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-rw-r--r--drivers/Kconfig2
-rw-r--r--drivers/Makefile1
-rw-r--r--drivers/char/bsr.c2
-rw-r--r--drivers/char/dsp56k.c2
-rw-r--r--drivers/char/i8k.c123
-rw-r--r--drivers/char/xilinx_hwicap/xilinx_hwicap.c1
-rw-r--r--drivers/dma/Kconfig18
-rw-r--r--drivers/dma/Makefile1
-rw-r--r--drivers/dma/mic_x100_dma.c774
-rw-r--r--drivers/dma/mic_x100_dma.h286
-rw-r--r--drivers/extcon/Kconfig38
-rw-r--r--drivers/extcon/Makefile7
-rw-r--r--drivers/extcon/extcon-adc-jack.c1
-rw-r--r--drivers/extcon/extcon-arizona.c74
-rw-r--r--drivers/extcon/extcon-class.c2
-rw-r--r--drivers/extcon/extcon-gpio.c1
-rw-r--r--drivers/extcon/extcon-max14577.c5
-rw-r--r--drivers/extcon/extcon-max77693.c41
-rw-r--r--drivers/extcon/extcon-max8997.c5
-rw-r--r--drivers/extcon/extcon-palmas.c3
-rw-r--r--drivers/extcon/extcon-sm5502.c724
-rw-r--r--drivers/hv/channel.c6
-rw-r--r--drivers/ipack/carriers/tpci200.c2
-rw-r--r--drivers/ipack/devices/ipoctal.c20
-rw-r--r--drivers/mfd/Kconfig1
-rw-r--r--drivers/mfd/Makefile2
-rw-r--r--drivers/mfd/max77693-irq.c336
-rw-r--r--drivers/mfd/max77693.c210
-rw-r--r--drivers/misc/bh1770glc.c35
-rw-r--r--drivers/misc/bh1780gli.c33
-rw-r--r--drivers/misc/carma/carma-fpga.c5
-rw-r--r--drivers/misc/dummy-irq.c1
-rw-r--r--drivers/misc/genwqe/Kconfig6
-rw-r--r--drivers/misc/genwqe/card_base.c217
-rw-r--r--drivers/misc/genwqe/card_base.h2
-rw-r--r--drivers/misc/genwqe/card_ddcb.c28
-rw-r--r--drivers/misc/genwqe/card_debugfs.c7
-rw-r--r--drivers/misc/genwqe/card_dev.c5
-rw-r--r--drivers/misc/genwqe/card_sysfs.c25
-rw-r--r--drivers/misc/genwqe/card_utils.c20
-rw-r--r--drivers/misc/genwqe/genwqe_driver.h2
-rw-r--r--drivers/misc/lattice-ecp3-config.c16
-rw-r--r--drivers/misc/lkdtm.c1
-rw-r--r--drivers/misc/mei/client.c17
-rw-r--r--drivers/misc/mei/hw-me-regs.h1
-rw-r--r--drivers/misc/mei/hw-me.c54
-rw-r--r--drivers/misc/mei/hw-txe.c32
-rw-r--r--drivers/misc/mei/main.c148
-rw-r--r--drivers/misc/mei/mei_dev.h12
-rw-r--r--drivers/misc/mei/pci-me.c6
-rw-r--r--drivers/misc/mei/pci-txe.c4
-rw-r--r--drivers/misc/mic/Kconfig21
-rw-r--r--drivers/misc/mic/Makefile1
-rw-r--r--drivers/misc/mic/bus/Makefile5
-rw-r--r--drivers/misc/mic/bus/mic_bus.c218
-rw-r--r--drivers/misc/mic/card/mic_device.c23
-rw-r--r--drivers/misc/mic/card/mic_device.h9
-rw-r--r--drivers/misc/mic/card/mic_virtio.c7
-rw-r--r--drivers/misc/mic/card/mic_x100.c62
-rw-r--r--drivers/misc/mic/host/mic_boot.c83
-rw-r--r--drivers/misc/mic/host/mic_device.h24
-rw-r--r--drivers/misc/mic/host/mic_intr.c121
-rw-r--r--drivers/misc/mic/host/mic_intr.h27
-rw-r--r--drivers/misc/mic/host/mic_main.c7
-rw-r--r--drivers/misc/mic/host/mic_virtio.c187
-rw-r--r--drivers/misc/mic/host/mic_virtio.h21
-rw-r--r--drivers/misc/mic/host/mic_x100.c8
-rw-r--r--drivers/misc/ti-st/st_kim.c8
-rw-r--r--drivers/misc/vexpress-syscfg.c4
-rw-r--r--drivers/misc/vmw_vmci/vmci_guest.c2
-rw-r--r--drivers/pci/pci-driver.c18
-rw-r--r--drivers/pci/quirks.c104
-rw-r--r--drivers/pcmcia/Kconfig2
-rw-r--r--drivers/pcmcia/Makefile1
-rw-r--r--drivers/pcmcia/bcm63xx_pcmcia.c2
-rw-r--r--drivers/pcmcia/i82092.c2
-rw-r--r--drivers/pcmcia/pd6729.c2
-rw-r--r--drivers/pcmcia/sa1111_jornada720.c10
-rw-r--r--drivers/pcmcia/vrc4173_cardu.c2
-rw-r--r--drivers/pcmcia/yenta_socket.c2
-rw-r--r--drivers/regulator/max77693.c12
-rw-r--r--drivers/spmi/spmi.c1
-rw-r--r--drivers/thunderbolt/Kconfig13
-rw-r--r--drivers/thunderbolt/Makefile3
-rw-r--r--drivers/thunderbolt/cap.c116
-rw-r--r--drivers/thunderbolt/ctl.c731
-rw-r--r--drivers/thunderbolt/ctl.h75
-rw-r--r--drivers/thunderbolt/eeprom.c449
-rw-r--r--drivers/thunderbolt/nhi.c675
-rw-r--r--drivers/thunderbolt/nhi.h114
-rw-r--r--drivers/thunderbolt/nhi_regs.h101
-rw-r--r--drivers/thunderbolt/path.c215
-rw-r--r--drivers/thunderbolt/switch.c507
-rw-r--r--drivers/thunderbolt/tb.c436
-rw-r--r--drivers/thunderbolt/tb.h271
-rw-r--r--drivers/thunderbolt/tb_regs.h213
-rw-r--r--drivers/thunderbolt/tunnel_pci.c232
-rw-r--r--drivers/thunderbolt/tunnel_pci.h30
-rw-r--r--drivers/uio/uio_pruss.c37
-rw-r--r--drivers/vme/bridges/vme_ca91cx42.h1
-rw-r--r--drivers/w1/masters/ds1wm.c2
-rw-r--r--drivers/w1/masters/ds2482.c2
-rw-r--r--drivers/w1/masters/ds2490.c50
-rw-r--r--drivers/w1/masters/mxc_w1.c64
-rw-r--r--drivers/w1/slaves/Kconfig8
-rw-r--r--drivers/w1/slaves/Makefile1
-rw-r--r--drivers/w1/slaves/w1_ds2406.c168
-rw-r--r--drivers/w1/slaves/w1_ds2760.c3
-rw-r--r--drivers/w1/w1.c10
-rw-r--r--drivers/w1/w1_family.c2
-rw-r--r--drivers/w1/w1_family.h1
-rw-r--r--drivers/w1/w1_int.c19
-rw-r--r--drivers/w1/w1_log.h4
-rw-r--r--drivers/w1/w1_netlink.c3
114 files changed, 7914 insertions, 1003 deletions
diff --git a/drivers/Kconfig b/drivers/Kconfig
index 4e6e66c3c8d6..622fa266b29e 100644
--- a/drivers/Kconfig
+++ b/drivers/Kconfig
@@ -178,4 +178,6 @@ source "drivers/mcb/Kconfig"
source "drivers/ras/Kconfig"
+source "drivers/thunderbolt/Kconfig"
+
endmenu
diff --git a/drivers/Makefile b/drivers/Makefile
index 65c32b1cea3d..54bfae1f09a4 100644
--- a/drivers/Makefile
+++ b/drivers/Makefile
@@ -159,3 +159,4 @@ obj-$(CONFIG_FMC) += fmc/
obj-$(CONFIG_POWERCAP) += powercap/
obj-$(CONFIG_MCB) += mcb/
obj-$(CONFIG_RAS) += ras/
+obj-$(CONFIG_THUNDERBOLT) += thunderbolt/
diff --git a/drivers/char/bsr.c b/drivers/char/bsr.c
index 8fedbc250414..a6cef548e01e 100644
--- a/drivers/char/bsr.c
+++ b/drivers/char/bsr.c
@@ -259,7 +259,7 @@ static int bsr_add_node(struct device_node *bn)
}
cur->bsr_device = device_create(bsr_class, NULL, cur->bsr_dev,
- cur, cur->bsr_name);
+ cur, "%s", cur->bsr_name);
if (IS_ERR(cur->bsr_device)) {
printk(KERN_ERR "device_create failed for %s\n",
cur->bsr_name);
diff --git a/drivers/char/dsp56k.c b/drivers/char/dsp56k.c
index 01a5ca7425d7..8bf70e8c3f79 100644
--- a/drivers/char/dsp56k.c
+++ b/drivers/char/dsp56k.c
@@ -383,7 +383,7 @@ static long dsp56k_ioctl(struct file *file, unsigned int cmd,
return put_user(status, &hf->status);
}
case DSP56K_HOST_CMD:
- if (arg > 31 || arg < 0)
+ if (arg > 31)
return -EINVAL;
mutex_lock(&dsp56k_mutex);
dsp56k_host_interface.cvr = (u_char)((arg & DSP56K_CVR_HV_MASK) |
diff --git a/drivers/char/i8k.c b/drivers/char/i8k.c
index 93dcad0c1cbe..65525c7e903c 100644
--- a/drivers/char/i8k.c
+++ b/drivers/char/i8k.c
@@ -65,6 +65,8 @@ static char bios_version[4];
static struct device *i8k_hwmon_dev;
static u32 i8k_hwmon_flags;
static int i8k_fan_mult;
+static int i8k_pwm_mult;
+static int i8k_fan_max = I8K_FAN_HIGH;
#define I8K_HWMON_HAVE_TEMP1 (1 << 0)
#define I8K_HWMON_HAVE_TEMP2 (1 << 1)
@@ -97,6 +99,10 @@ static int fan_mult = I8K_FAN_MULT;
module_param(fan_mult, int, 0);
MODULE_PARM_DESC(fan_mult, "Factor to multiply fan speed with");
+static int fan_max = I8K_FAN_HIGH;
+module_param(fan_max, int, 0);
+MODULE_PARM_DESC(fan_max, "Maximum configurable fan speed");
+
static int i8k_open_fs(struct inode *inode, struct file *file);
static long i8k_ioctl(struct file *, unsigned int, unsigned long);
@@ -276,7 +282,7 @@ static int i8k_set_fan(int fan, int speed)
{
struct smm_regs regs = { .eax = I8K_SMM_SET_FAN, };
- speed = (speed < 0) ? 0 : ((speed > I8K_FAN_MAX) ? I8K_FAN_MAX : speed);
+ speed = (speed < 0) ? 0 : ((speed > i8k_fan_max) ? i8k_fan_max : speed);
regs.ebx = (fan & 0xff) | (speed << 8);
return i8k_smm(&regs) ? : i8k_get_fan_status(fan);
@@ -521,7 +527,7 @@ static ssize_t i8k_hwmon_show_pwm(struct device *dev,
status = i8k_get_fan_status(index);
if (status < 0)
return -EIO;
- return sprintf(buf, "%d\n", clamp_val(status * 128, 0, 255));
+ return sprintf(buf, "%d\n", clamp_val(status * i8k_pwm_mult, 0, 255));
}
static ssize_t i8k_hwmon_set_pwm(struct device *dev,
@@ -535,7 +541,7 @@ static ssize_t i8k_hwmon_set_pwm(struct device *dev,
err = kstrtoul(buf, 10, &val);
if (err)
return err;
- val = clamp_val(DIV_ROUND_CLOSEST(val, 128), 0, 2);
+ val = clamp_val(DIV_ROUND_CLOSEST(val, i8k_pwm_mult), 0, i8k_fan_max);
mutex_lock(&i8k_mutex);
err = i8k_set_fan(index, val);
@@ -544,20 +550,6 @@ static ssize_t i8k_hwmon_set_pwm(struct device *dev,
return err < 0 ? -EIO : count;
}
-static ssize_t i8k_hwmon_show_label(struct device *dev,
- struct device_attribute *devattr,
- char *buf)
-{
- static const char *labels[3] = {
- "CPU",
- "Left Fan",
- "Right Fan",
- };
- int index = to_sensor_dev_attr(devattr)->index;
-
- return sprintf(buf, "%s\n", labels[index]);
-}
-
static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, i8k_hwmon_show_temp, NULL, 0);
static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, i8k_hwmon_show_temp, NULL, 1);
static SENSOR_DEVICE_ATTR(temp3_input, S_IRUGO, i8k_hwmon_show_temp, NULL, 2);
@@ -570,41 +562,34 @@ static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, i8k_hwmon_show_fan, NULL,
I8K_FAN_RIGHT);
static SENSOR_DEVICE_ATTR(pwm2, S_IRUGO | S_IWUSR, i8k_hwmon_show_pwm,
i8k_hwmon_set_pwm, I8K_FAN_RIGHT);
-static SENSOR_DEVICE_ATTR(temp1_label, S_IRUGO, i8k_hwmon_show_label, NULL, 0);
-static SENSOR_DEVICE_ATTR(fan1_label, S_IRUGO, i8k_hwmon_show_label, NULL, 1);
-static SENSOR_DEVICE_ATTR(fan2_label, S_IRUGO, i8k_hwmon_show_label, NULL, 2);
static struct attribute *i8k_attrs[] = {
&sensor_dev_attr_temp1_input.dev_attr.attr, /* 0 */
- &sensor_dev_attr_temp1_label.dev_attr.attr, /* 1 */
- &sensor_dev_attr_temp2_input.dev_attr.attr, /* 2 */
- &sensor_dev_attr_temp3_input.dev_attr.attr, /* 3 */
- &sensor_dev_attr_temp4_input.dev_attr.attr, /* 4 */
- &sensor_dev_attr_fan1_input.dev_attr.attr, /* 5 */
- &sensor_dev_attr_pwm1.dev_attr.attr, /* 6 */
- &sensor_dev_attr_fan1_label.dev_attr.attr, /* 7 */
- &sensor_dev_attr_fan2_input.dev_attr.attr, /* 8 */
- &sensor_dev_attr_pwm2.dev_attr.attr, /* 9 */
- &sensor_dev_attr_fan2_label.dev_attr.attr, /* 10 */
+ &sensor_dev_attr_temp2_input.dev_attr.attr, /* 1 */
+ &sensor_dev_attr_temp3_input.dev_attr.attr, /* 2 */
+ &sensor_dev_attr_temp4_input.dev_attr.attr, /* 3 */
+ &sensor_dev_attr_fan1_input.dev_attr.attr, /* 4 */
+ &sensor_dev_attr_pwm1.dev_attr.attr, /* 5 */
+ &sensor_dev_attr_fan2_input.dev_attr.attr, /* 6 */
+ &sensor_dev_attr_pwm2.dev_attr.attr, /* 7 */
NULL
};
static umode_t i8k_is_visible(struct kobject *kobj, struct attribute *attr,
int index)
{
- if ((index == 0 || index == 1) &&
- !(i8k_hwmon_flags & I8K_HWMON_HAVE_TEMP1))
+ if (index == 0 && !(i8k_hwmon_flags & I8K_HWMON_HAVE_TEMP1))
return 0;
- if (index == 2 && !(i8k_hwmon_flags & I8K_HWMON_HAVE_TEMP2))
+ if (index == 1 && !(i8k_hwmon_flags & I8K_HWMON_HAVE_TEMP2))
return 0;
- if (index == 3 && !(i8k_hwmon_flags & I8K_HWMON_HAVE_TEMP3))
+ if (index == 2 && !(i8k_hwmon_flags & I8K_HWMON_HAVE_TEMP3))
return 0;
- if (index == 4 && !(i8k_hwmon_flags & I8K_HWMON_HAVE_TEMP4))
+ if (index == 3 && !(i8k_hwmon_flags & I8K_HWMON_HAVE_TEMP4))
return 0;
- if (index >= 5 && index <= 7 &&
+ if (index >= 4 && index <= 5 &&
!(i8k_hwmon_flags & I8K_HWMON_HAVE_FAN1))
return 0;
- if (index >= 8 && index <= 10 &&
+ if (index >= 6 && index <= 7 &&
!(i8k_hwmon_flags & I8K_HWMON_HAVE_FAN2))
return 0;
@@ -659,6 +644,37 @@ static int __init i8k_init_hwmon(void)
return 0;
}
+struct i8k_config_data {
+ int fan_mult;
+ int fan_max;
+};
+
+enum i8k_configs {
+ DELL_LATITUDE_D520,
+ DELL_PRECISION_490,
+ DELL_STUDIO,
+ DELL_XPS_M140,
+};
+
+static const struct i8k_config_data i8k_config_data[] = {
+ [DELL_LATITUDE_D520] = {
+ .fan_mult = 1,
+ .fan_max = I8K_FAN_TURBO,
+ },
+ [DELL_PRECISION_490] = {
+ .fan_mult = 1,
+ .fan_max = I8K_FAN_TURBO,
+ },
+ [DELL_STUDIO] = {
+ .fan_mult = 1,
+ .fan_max = I8K_FAN_HIGH,
+ },
+ [DELL_XPS_M140] = {
+ .fan_mult = 1,
+ .fan_max = I8K_FAN_HIGH,
+ },
+};
+
static struct dmi_system_id i8k_dmi_table[] __initdata = {
{
.ident = "Dell Inspiron",
@@ -682,6 +698,14 @@ static struct dmi_system_id i8k_dmi_table[] __initdata = {
},
},
{
+ .ident = "Dell Latitude D520",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
+ DMI_MATCH(DMI_PRODUCT_NAME, "Latitude D520"),
+ },
+ .driver_data = (void *)&i8k_config_data[DELL_LATITUDE_D520],
+ },
+ {
.ident = "Dell Latitude 2",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
@@ -703,6 +727,15 @@ static struct dmi_system_id i8k_dmi_table[] __initdata = {
},
},
{
+ .ident = "Dell Precision 490",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
+ DMI_MATCH(DMI_PRODUCT_NAME,
+ "Precision WorkStation 490"),
+ },
+ .driver_data = (void *)&i8k_config_data[DELL_PRECISION_490],
+ },
+ {
.ident = "Dell Precision",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
@@ -729,7 +762,7 @@ static struct dmi_system_id i8k_dmi_table[] __initdata = {
DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
DMI_MATCH(DMI_PRODUCT_NAME, "Studio"),
},
- .driver_data = (void *)1, /* fan multiplier override */
+ .driver_data = (void *)&i8k_config_data[DELL_STUDIO],
},
{
.ident = "Dell XPS M140",
@@ -737,7 +770,7 @@ static struct dmi_system_id i8k_dmi_table[] __initdata = {
DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
DMI_MATCH(DMI_PRODUCT_NAME, "MXC051"),
},
- .driver_data = (void *)1, /* fan multiplier override */
+ .driver_data = (void *)&i8k_config_data[DELL_XPS_M140],
},
{ }
};
@@ -777,9 +810,17 @@ static int __init i8k_probe(void)
}
i8k_fan_mult = fan_mult;
+ i8k_fan_max = fan_max ? : I8K_FAN_HIGH; /* Must not be 0 */
id = dmi_first_match(i8k_dmi_table);
- if (id && fan_mult == I8K_FAN_MULT && id->driver_data)
- i8k_fan_mult = (unsigned long)id->driver_data;
+ if (id && id->driver_data) {
+ const struct i8k_config_data *conf = id->driver_data;
+
+ if (fan_mult == I8K_FAN_MULT && conf->fan_mult)
+ i8k_fan_mult = conf->fan_mult;
+ if (fan_max == I8K_FAN_HIGH && conf->fan_max)
+ i8k_fan_max = conf->fan_max;
+ }
+ i8k_pwm_mult = DIV_ROUND_UP(255, i8k_fan_max);
return 0;
}
diff --git a/drivers/char/xilinx_hwicap/xilinx_hwicap.c b/drivers/char/xilinx_hwicap/xilinx_hwicap.c
index f6345f932e46..9b1a5ac4881d 100644
--- a/drivers/char/xilinx_hwicap/xilinx_hwicap.c
+++ b/drivers/char/xilinx_hwicap/xilinx_hwicap.c
@@ -661,6 +661,7 @@ static int hwicap_setup(struct device *dev, int id,
drvdata->base_address = ioremap(drvdata->mem_start, drvdata->mem_size);
if (!drvdata->base_address) {
dev_err(dev, "ioremap() failed\n");
+ retval = -ENOMEM;
goto failed2;
}
diff --git a/drivers/dma/Kconfig b/drivers/dma/Kconfig
index 1eca7b9760e6..8f6afbf9ba54 100644
--- a/drivers/dma/Kconfig
+++ b/drivers/dma/Kconfig
@@ -33,6 +33,24 @@ if DMADEVICES
comment "DMA Devices"
+config INTEL_MIC_X100_DMA
+ tristate "Intel MIC X100 DMA Driver"
+ depends on 64BIT && X86 && INTEL_MIC_BUS
+ select DMA_ENGINE
+ help
+ This enables DMA support for the Intel Many Integrated Core
+ (MIC) family of PCIe form factor coprocessor X100 devices that
+ run a 64 bit Linux OS. This driver will be used by both MIC
+ host and card drivers.
+
+ If you are building host kernel with a MIC device or a card
+ kernel for a MIC device, then say M (recommended) or Y, else
+ say N. If unsure say N.
+
+ More information about the Intel MIC family as well as the Linux
+ OS and tools for MIC to use with this driver are available from
+ <http://software.intel.com/en-us/mic-developer>.
+
config INTEL_MID_DMAC
tristate "Intel MID DMA support for Peripheral DMA controllers"
depends on PCI && X86
diff --git a/drivers/dma/Makefile b/drivers/dma/Makefile
index c779e1eb2db2..bd9e7fa928bd 100644
--- a/drivers/dma/Makefile
+++ b/drivers/dma/Makefile
@@ -47,3 +47,4 @@ obj-$(CONFIG_MOXART_DMA) += moxart-dma.o
obj-$(CONFIG_FSL_EDMA) += fsl-edma.o
obj-$(CONFIG_QCOM_BAM_DMA) += qcom_bam_dma.o
obj-y += xilinx/
+obj-$(CONFIG_INTEL_MIC_X100_DMA) += mic_x100_dma.o
diff --git a/drivers/dma/mic_x100_dma.c b/drivers/dma/mic_x100_dma.c
new file mode 100644
index 000000000000..6de2e677be04
--- /dev/null
+++ b/drivers/dma/mic_x100_dma.c
@@ -0,0 +1,774 @@
+/*
+ * Intel MIC Platform Software Stack (MPSS)
+ *
+ * Copyright(c) 2014 Intel Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License, version 2, as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * The full GNU General Public License is included in this distribution in
+ * the file called "COPYING".
+ *
+ * Intel MIC X100 DMA Driver.
+ *
+ * Adapted from IOAT dma driver.
+ */
+#include <linux/module.h>
+#include <linux/io.h>
+#include <linux/seq_file.h>
+
+#include "mic_x100_dma.h"
+
+#define MIC_DMA_MAX_XFER_SIZE_CARD (1 * 1024 * 1024 -\
+ MIC_DMA_ALIGN_BYTES)
+#define MIC_DMA_MAX_XFER_SIZE_HOST (1 * 1024 * 1024 >> 1)
+#define MIC_DMA_DESC_TYPE_SHIFT 60
+#define MIC_DMA_MEMCPY_LEN_SHIFT 46
+#define MIC_DMA_STAT_INTR_SHIFT 59
+
+/* high-water mark for pushing dma descriptors */
+static int mic_dma_pending_level = 4;
+
+/* Status descriptor is used to write a 64 bit value to a memory location */
+enum mic_dma_desc_format_type {
+ MIC_DMA_MEMCPY = 1,
+ MIC_DMA_STATUS,
+};
+
+static inline u32 mic_dma_hw_ring_inc(u32 val)
+{
+ return (val + 1) % MIC_DMA_DESC_RX_SIZE;
+}
+
+static inline u32 mic_dma_hw_ring_dec(u32 val)
+{
+ return val ? val - 1 : MIC_DMA_DESC_RX_SIZE - 1;
+}
+
+static inline void mic_dma_hw_ring_inc_head(struct mic_dma_chan *ch)
+{
+ ch->head = mic_dma_hw_ring_inc(ch->head);
+}
+
+/* Prepare a memcpy desc */
+static inline void mic_dma_memcpy_desc(struct mic_dma_desc *desc,
+ dma_addr_t src_phys, dma_addr_t dst_phys, u64 size)
+{
+ u64 qw0, qw1;
+
+ qw0 = src_phys;
+ qw0 |= (size >> MIC_DMA_ALIGN_SHIFT) << MIC_DMA_MEMCPY_LEN_SHIFT;
+ qw1 = MIC_DMA_MEMCPY;
+ qw1 <<= MIC_DMA_DESC_TYPE_SHIFT;
+ qw1 |= dst_phys;
+ desc->qw0 = qw0;
+ desc->qw1 = qw1;
+}
+
+/* Prepare a status desc. with @data to be written at @dst_phys */
+static inline void mic_dma_prep_status_desc(struct mic_dma_desc *desc, u64 data,
+ dma_addr_t dst_phys, bool generate_intr)
+{
+ u64 qw0, qw1;
+
+ qw0 = data;
+ qw1 = (u64) MIC_DMA_STATUS << MIC_DMA_DESC_TYPE_SHIFT | dst_phys;
+ if (generate_intr)
+ qw1 |= (1ULL << MIC_DMA_STAT_INTR_SHIFT);
+ desc->qw0 = qw0;
+ desc->qw1 = qw1;
+}
+
+static void mic_dma_cleanup(struct mic_dma_chan *ch)
+{
+ struct dma_async_tx_descriptor *tx;
+ u32 tail;
+ u32 last_tail;
+
+ spin_lock(&ch->cleanup_lock);
+ tail = mic_dma_read_cmp_cnt(ch);
+ /*
+ * This is the barrier pair for smp_wmb() in fn.
+ * mic_dma_tx_submit_unlock. It's required so that we read the
+ * updated cookie value from tx->cookie.
+ */
+ smp_rmb();
+ for (last_tail = ch->last_tail; tail != last_tail;) {
+ tx = &ch->tx_array[last_tail];
+ if (tx->cookie) {
+ dma_cookie_complete(tx);
+ if (tx->callback) {
+ tx->callback(tx->callback_param);
+ tx->callback = NULL;
+ }
+ }
+ last_tail = mic_dma_hw_ring_inc(last_tail);
+ }
+ /* finish all completion callbacks before incrementing tail */
+ smp_mb();
+ ch->last_tail = last_tail;
+ spin_unlock(&ch->cleanup_lock);
+}
+
+static u32 mic_dma_ring_count(u32 head, u32 tail)
+{
+ u32 count;
+
+ if (head >= tail)
+ count = (tail - 0) + (MIC_DMA_DESC_RX_SIZE - head);
+ else
+ count = tail - head;
+ return count - 1;
+}
+
+/* Returns the num. of free descriptors on success, -ENOMEM on failure */
+static int mic_dma_avail_desc_ring_space(struct mic_dma_chan *ch, int required)
+{
+ struct device *dev = mic_dma_ch_to_device(ch);
+ u32 count;
+
+ count = mic_dma_ring_count(ch->head, ch->last_tail);
+ if (count < required) {
+ mic_dma_cleanup(ch);
+ count = mic_dma_ring_count(ch->head, ch->last_tail);
+ }
+
+ if (count < required) {
+ dev_dbg(dev, "Not enough desc space");
+ dev_dbg(dev, "%s %d required=%u, avail=%u\n",
+ __func__, __LINE__, required, count);
+ return -ENOMEM;
+ } else {
+ return count;
+ }
+}
+
+/* Program memcpy descriptors into the descriptor ring and update s/w head ptr*/
+static int mic_dma_prog_memcpy_desc(struct mic_dma_chan *ch, dma_addr_t src,
+ dma_addr_t dst, size_t len)
+{
+ size_t current_transfer_len;
+ size_t max_xfer_size = to_mic_dma_dev(ch)->max_xfer_size;
+ /* 3 is added to make sure we have enough space for status desc */
+ int num_desc = len / max_xfer_size + 3;
+ int ret;
+
+ if (len % max_xfer_size)
+ num_desc++;
+
+ ret = mic_dma_avail_desc_ring_space(ch, num_desc);
+ if (ret < 0)
+ return ret;
+ do {
+ current_transfer_len = min(len, max_xfer_size);
+ mic_dma_memcpy_desc(&ch->desc_ring[ch->head],
+ src, dst, current_transfer_len);
+ mic_dma_hw_ring_inc_head(ch);
+ len -= current_transfer_len;
+ dst = dst + current_transfer_len;
+ src = src + current_transfer_len;
+ } while (len > 0);
+ return 0;
+}
+
+/* It's a h/w quirk and h/w needs 2 status descriptors for every status desc */
+static void mic_dma_prog_intr(struct mic_dma_chan *ch)
+{
+ mic_dma_prep_status_desc(&ch->desc_ring[ch->head], 0,
+ ch->status_dest_micpa, false);
+ mic_dma_hw_ring_inc_head(ch);
+ mic_dma_prep_status_desc(&ch->desc_ring[ch->head], 0,
+ ch->status_dest_micpa, true);
+ mic_dma_hw_ring_inc_head(ch);
+}
+
+/* Wrapper function to program memcpy descriptors/status descriptors */
+static int mic_dma_do_dma(struct mic_dma_chan *ch, int flags, dma_addr_t src,
+ dma_addr_t dst, size_t len)
+{
+ if (-ENOMEM == mic_dma_prog_memcpy_desc(ch, src, dst, len))
+ return -ENOMEM;
+ /* Above mic_dma_prog_memcpy_desc() makes sure we have enough space */
+ if (flags & DMA_PREP_FENCE) {
+ mic_dma_prep_status_desc(&ch->desc_ring[ch->head], 0,
+ ch->status_dest_micpa, false);
+ mic_dma_hw_ring_inc_head(ch);
+ }
+
+ if (flags & DMA_PREP_INTERRUPT)
+ mic_dma_prog_intr(ch);
+
+ return 0;
+}
+
+static inline void mic_dma_issue_pending(struct dma_chan *ch)
+{
+ struct mic_dma_chan *mic_ch = to_mic_dma_chan(ch);
+
+ spin_lock(&mic_ch->issue_lock);
+ /*
+ * Write to head triggers h/w to act on the descriptors.
+ * On MIC, writing the same head value twice causes
+ * a h/w error. On second write, h/w assumes we filled
+ * the entire ring & overwrote some of the descriptors.
+ */
+ if (mic_ch->issued == mic_ch->submitted)
+ goto out;
+ mic_ch->issued = mic_ch->submitted;
+ /*
+ * make descriptor updates visible before advancing head,
+ * this is purposefully not smp_wmb() since we are also
+ * publishing the descriptor updates to a dma device
+ */
+ wmb();
+ mic_dma_write_reg(mic_ch, MIC_DMA_REG_DHPR, mic_ch->issued);
+out:
+ spin_unlock(&mic_ch->issue_lock);
+}
+
+static inline void mic_dma_update_pending(struct mic_dma_chan *ch)
+{
+ if (mic_dma_ring_count(ch->issued, ch->submitted)
+ > mic_dma_pending_level)
+ mic_dma_issue_pending(&ch->api_ch);
+}
+
+static dma_cookie_t mic_dma_tx_submit_unlock(struct dma_async_tx_descriptor *tx)
+{
+ struct mic_dma_chan *mic_ch = to_mic_dma_chan(tx->chan);
+ dma_cookie_t cookie;
+
+ dma_cookie_assign(tx);
+ cookie = tx->cookie;
+ /*
+ * We need an smp write barrier here because another CPU might see
+ * an update to submitted and update h/w head even before we
+ * assigned a cookie to this tx.
+ */
+ smp_wmb();
+ mic_ch->submitted = mic_ch->head;
+ spin_unlock(&mic_ch->prep_lock);
+ mic_dma_update_pending(mic_ch);
+ return cookie;
+}
+
+static inline struct dma_async_tx_descriptor *
+allocate_tx(struct mic_dma_chan *ch)
+{
+ u32 idx = mic_dma_hw_ring_dec(ch->head);
+ struct dma_async_tx_descriptor *tx = &ch->tx_array[idx];
+
+ dma_async_tx_descriptor_init(tx, &ch->api_ch);
+ tx->tx_submit = mic_dma_tx_submit_unlock;
+ return tx;
+}
+
+/*
+ * Prepare a memcpy descriptor to be added to the ring.
+ * Note that the temporary descriptor adds an extra overhead of copying the
+ * descriptor to ring. So, we copy directly to the descriptor ring
+ */
+static struct dma_async_tx_descriptor *
+mic_dma_prep_memcpy_lock(struct dma_chan *ch, dma_addr_t dma_dest,
+ dma_addr_t dma_src, size_t len, unsigned long flags)
+{
+ struct mic_dma_chan *mic_ch = to_mic_dma_chan(ch);
+ struct device *dev = mic_dma_ch_to_device(mic_ch);
+ int result;
+
+ if (!len && !flags)
+ return NULL;
+
+ spin_lock(&mic_ch->prep_lock);
+ result = mic_dma_do_dma(mic_ch, flags, dma_src, dma_dest, len);
+ if (result >= 0)
+ return allocate_tx(mic_ch);
+ dev_err(dev, "Error enqueueing dma, error=%d\n", result);
+ spin_unlock(&mic_ch->prep_lock);
+ return NULL;
+}
+
+static struct dma_async_tx_descriptor *
+mic_dma_prep_interrupt_lock(struct dma_chan *ch, unsigned long flags)
+{
+ struct mic_dma_chan *mic_ch = to_mic_dma_chan(ch);
+ int ret;
+
+ spin_lock(&mic_ch->prep_lock);
+ ret = mic_dma_do_dma(mic_ch, flags, 0, 0, 0);
+ if (!ret)
+ return allocate_tx(mic_ch);
+ spin_unlock(&mic_ch->prep_lock);
+ return NULL;
+}
+
+/* Return the status of the transaction */
+static enum dma_status
+mic_dma_tx_status(struct dma_chan *ch, dma_cookie_t cookie,
+ struct dma_tx_state *txstate)
+{
+ struct mic_dma_chan *mic_ch = to_mic_dma_chan(ch);
+
+ if (DMA_COMPLETE != dma_cookie_status(ch, cookie, txstate))
+ mic_dma_cleanup(mic_ch);
+
+ return dma_cookie_status(ch, cookie, txstate);
+}
+
+static irqreturn_t mic_dma_thread_fn(int irq, void *data)
+{
+ mic_dma_cleanup((struct mic_dma_chan *)data);
+ return IRQ_HANDLED;
+}
+
+static irqreturn_t mic_dma_intr_handler(int irq, void *data)
+{
+ struct mic_dma_chan *ch = ((struct mic_dma_chan *)data);
+
+ mic_dma_ack_interrupt(ch);
+ return IRQ_WAKE_THREAD;
+}
+
+static int mic_dma_alloc_desc_ring(struct mic_dma_chan *ch)
+{
+ u64 desc_ring_size = MIC_DMA_DESC_RX_SIZE * sizeof(*ch->desc_ring);
+ struct device *dev = &to_mbus_device(ch)->dev;
+
+ desc_ring_size = ALIGN(desc_ring_size, MIC_DMA_ALIGN_BYTES);
+ ch->desc_ring = kzalloc(desc_ring_size, GFP_KERNEL);
+
+ if (!ch->desc_ring)
+ return -ENOMEM;
+
+ ch->desc_ring_micpa = dma_map_single(dev, ch->desc_ring,
+ desc_ring_size, DMA_BIDIRECTIONAL);
+ if (dma_mapping_error(dev, ch->desc_ring_micpa))
+ goto map_error;
+
+ ch->tx_array = vzalloc(MIC_DMA_DESC_RX_SIZE * sizeof(*ch->tx_array));
+ if (!ch->tx_array)
+ goto tx_error;
+ return 0;
+tx_error:
+ dma_unmap_single(dev, ch->desc_ring_micpa, desc_ring_size,
+ DMA_BIDIRECTIONAL);
+map_error:
+ kfree(ch->desc_ring);
+ return -ENOMEM;
+}
+
+static void mic_dma_free_desc_ring(struct mic_dma_chan *ch)
+{
+ u64 desc_ring_size = MIC_DMA_DESC_RX_SIZE * sizeof(*ch->desc_ring);
+
+ vfree(ch->tx_array);
+ desc_ring_size = ALIGN(desc_ring_size, MIC_DMA_ALIGN_BYTES);
+ dma_unmap_single(&to_mbus_device(ch)->dev, ch->desc_ring_micpa,
+ desc_ring_size, DMA_BIDIRECTIONAL);
+ kfree(ch->desc_ring);
+ ch->desc_ring = NULL;
+}
+
+static void mic_dma_free_status_dest(struct mic_dma_chan *ch)
+{
+ dma_unmap_single(&to_mbus_device(ch)->dev, ch->status_dest_micpa,
+ L1_CACHE_BYTES, DMA_BIDIRECTIONAL);
+ kfree(ch->status_dest);
+}
+
+static int mic_dma_alloc_status_dest(struct mic_dma_chan *ch)
+{
+ struct device *dev = &to_mbus_device(ch)->dev;
+
+ ch->status_dest = kzalloc(L1_CACHE_BYTES, GFP_KERNEL);
+ if (!ch->status_dest)
+ return -ENOMEM;
+ ch->status_dest_micpa = dma_map_single(dev, ch->status_dest,
+ L1_CACHE_BYTES, DMA_BIDIRECTIONAL);
+ if (dma_mapping_error(dev, ch->status_dest_micpa)) {
+ kfree(ch->status_dest);
+ ch->status_dest = NULL;
+ return -ENOMEM;
+ }
+ return 0;
+}
+
+static int mic_dma_check_chan(struct mic_dma_chan *ch)
+{
+ if (mic_dma_read_reg(ch, MIC_DMA_REG_DCHERR) ||
+ mic_dma_read_reg(ch, MIC_DMA_REG_DSTAT) & MIC_DMA_CHAN_QUIESCE) {
+ mic_dma_disable_chan(ch);
+ mic_dma_chan_mask_intr(ch);
+ dev_err(mic_dma_ch_to_device(ch),
+ "%s %d error setting up mic dma chan %d\n",
+ __func__, __LINE__, ch->ch_num);
+ return -EBUSY;
+ }
+ return 0;
+}
+
+static int mic_dma_chan_setup(struct mic_dma_chan *ch)
+{
+ if (MIC_DMA_CHAN_MIC == ch->owner)
+ mic_dma_chan_set_owner(ch);
+ mic_dma_disable_chan(ch);
+ mic_dma_chan_mask_intr(ch);
+ mic_dma_write_reg(ch, MIC_DMA_REG_DCHERRMSK, 0);
+ mic_dma_chan_set_desc_ring(ch);
+ ch->last_tail = mic_dma_read_reg(ch, MIC_DMA_REG_DTPR);
+ ch->head = ch->last_tail;
+ ch->issued = 0;
+ mic_dma_chan_unmask_intr(ch);
+ mic_dma_enable_chan(ch);
+ return mic_dma_check_chan(ch);
+}
+
+static void mic_dma_chan_destroy(struct mic_dma_chan *ch)
+{
+ mic_dma_disable_chan(ch);
+ mic_dma_chan_mask_intr(ch);
+}
+
+static void mic_dma_unregister_dma_device(struct mic_dma_device *mic_dma_dev)
+{
+ dma_async_device_unregister(&mic_dma_dev->dma_dev);
+}
+
+static int mic_dma_setup_irq(struct mic_dma_chan *ch)
+{
+ ch->cookie =
+ to_mbus_hw_ops(ch)->request_threaded_irq(to_mbus_device(ch),
+ mic_dma_intr_handler, mic_dma_thread_fn,
+ "mic dma_channel", ch, ch->ch_num);
+ if (IS_ERR(ch->cookie))
+ return IS_ERR(ch->cookie);
+ return 0;
+}
+
+static inline void mic_dma_free_irq(struct mic_dma_chan *ch)
+{
+ to_mbus_hw_ops(ch)->free_irq(to_mbus_device(ch), ch->cookie, ch);
+}
+
+static int mic_dma_chan_init(struct mic_dma_chan *ch)
+{
+ int ret = mic_dma_alloc_desc_ring(ch);
+
+ if (ret)
+ goto ring_error;
+ ret = mic_dma_alloc_status_dest(ch);
+ if (ret)
+ goto status_error;
+ ret = mic_dma_chan_setup(ch);
+ if (ret)
+ goto chan_error;
+ return ret;
+chan_error:
+ mic_dma_free_status_dest(ch);
+status_error:
+ mic_dma_free_desc_ring(ch);
+ring_error:
+ return ret;
+}
+
+static int mic_dma_drain_chan(struct mic_dma_chan *ch)
+{
+ struct dma_async_tx_descriptor *tx;
+ int err = 0;
+ dma_cookie_t cookie;
+
+ tx = mic_dma_prep_memcpy_lock(&ch->api_ch, 0, 0, 0, DMA_PREP_FENCE);
+ if (!tx) {
+ err = -ENOMEM;
+ goto error;
+ }
+
+ cookie = tx->tx_submit(tx);
+ if (dma_submit_error(cookie))
+ err = -ENOMEM;
+ else
+ err = dma_sync_wait(&ch->api_ch, cookie);
+ if (err) {
+ dev_err(mic_dma_ch_to_device(ch), "%s %d TO chan 0x%x\n",
+ __func__, __LINE__, ch->ch_num);
+ err = -EIO;
+ }
+error:
+ mic_dma_cleanup(ch);
+ return err;
+}
+
+static inline void mic_dma_chan_uninit(struct mic_dma_chan *ch)
+{
+ mic_dma_chan_destroy(ch);
+ mic_dma_cleanup(ch);
+ mic_dma_free_status_dest(ch);
+ mic_dma_free_desc_ring(ch);
+}
+
+static int mic_dma_init(struct mic_dma_device *mic_dma_dev,
+ enum mic_dma_chan_owner owner)
+{
+ int i, first_chan = mic_dma_dev->start_ch;
+ struct mic_dma_chan *ch;
+ int ret;
+
+ for (i = first_chan; i < first_chan + MIC_DMA_NUM_CHAN; i++) {
+ unsigned long data;
+ ch = &mic_dma_dev->mic_ch[i];
+ data = (unsigned long)ch;
+ ch->ch_num = i;
+ ch->owner = owner;
+ spin_lock_init(&ch->cleanup_lock);
+ spin_lock_init(&ch->prep_lock);
+ spin_lock_init(&ch->issue_lock);
+ ret = mic_dma_setup_irq(ch);
+ if (ret)
+ goto error;
+ }
+ return 0;
+error:
+ for (i = i - 1; i >= first_chan; i--)
+ mic_dma_free_irq(ch);
+ return ret;
+}
+
+static void mic_dma_uninit(struct mic_dma_device *mic_dma_dev)
+{
+ int i, first_chan = mic_dma_dev->start_ch;
+ struct mic_dma_chan *ch;
+
+ for (i = first_chan; i < first_chan + MIC_DMA_NUM_CHAN; i++) {
+ ch = &mic_dma_dev->mic_ch[i];
+ mic_dma_free_irq(ch);
+ }
+}
+
+static int mic_dma_alloc_chan_resources(struct dma_chan *ch)
+{
+ int ret = mic_dma_chan_init(to_mic_dma_chan(ch));
+ if (ret)
+ return ret;
+ return MIC_DMA_DESC_RX_SIZE;
+}
+
+static void mic_dma_free_chan_resources(struct dma_chan *ch)
+{
+ struct mic_dma_chan *mic_ch = to_mic_dma_chan(ch);
+ mic_dma_drain_chan(mic_ch);
+ mic_dma_chan_uninit(mic_ch);
+}
+
+/* Set the fn. handlers and register the dma device with dma api */
+static int mic_dma_register_dma_device(struct mic_dma_device *mic_dma_dev,
+ enum mic_dma_chan_owner owner)
+{
+ int i, first_chan = mic_dma_dev->start_ch;
+
+ dma_cap_zero(mic_dma_dev->dma_dev.cap_mask);
+ /*
+ * This dma engine is not capable of host memory to host memory
+ * transfers
+ */
+ dma_cap_set(DMA_MEMCPY, mic_dma_dev->dma_dev.cap_mask);
+
+ if (MIC_DMA_CHAN_HOST == owner)
+ dma_cap_set(DMA_PRIVATE, mic_dma_dev->dma_dev.cap_mask);
+ mic_dma_dev->dma_dev.device_alloc_chan_resources =
+ mic_dma_alloc_chan_resources;
+ mic_dma_dev->dma_dev.device_free_chan_resources =
+ mic_dma_free_chan_resources;
+ mic_dma_dev->dma_dev.device_tx_status = mic_dma_tx_status;
+ mic_dma_dev->dma_dev.device_prep_dma_memcpy = mic_dma_prep_memcpy_lock;
+ mic_dma_dev->dma_dev.device_prep_dma_interrupt =
+ mic_dma_prep_interrupt_lock;
+ mic_dma_dev->dma_dev.device_issue_pending = mic_dma_issue_pending;
+ mic_dma_dev->dma_dev.copy_align = MIC_DMA_ALIGN_SHIFT;
+ INIT_LIST_HEAD(&mic_dma_dev->dma_dev.channels);
+ for (i = first_chan; i < first_chan + MIC_DMA_NUM_CHAN; i++) {
+ mic_dma_dev->mic_ch[i].api_ch.device = &mic_dma_dev->dma_dev;
+ dma_cookie_init(&mic_dma_dev->mic_ch[i].api_ch);
+ list_add_tail(&mic_dma_dev->mic_ch[i].api_ch.device_node,
+ &mic_dma_dev->dma_dev.channels);
+ }
+ return dma_async_device_register(&mic_dma_dev->dma_dev);
+}
+
+/*
+ * Initializes dma channels and registers the dma device with the
+ * dma engine api.
+ */
+static struct mic_dma_device *mic_dma_dev_reg(struct mbus_device *mbdev,
+ enum mic_dma_chan_owner owner)
+{
+ struct mic_dma_device *mic_dma_dev;
+ int ret;
+ struct device *dev = &mbdev->dev;
+
+ mic_dma_dev = kzalloc(sizeof(*mic_dma_dev), GFP_KERNEL);
+ if (!mic_dma_dev) {
+ ret = -ENOMEM;
+ goto alloc_error;
+ }
+ mic_dma_dev->mbdev = mbdev;
+ mic_dma_dev->dma_dev.dev = dev;
+ mic_dma_dev->mmio = mbdev->mmio_va;
+ if (MIC_DMA_CHAN_HOST == owner) {
+ mic_dma_dev->start_ch = 0;
+ mic_dma_dev->max_xfer_size = MIC_DMA_MAX_XFER_SIZE_HOST;
+ } else {
+ mic_dma_dev->start_ch = 4;
+ mic_dma_dev->max_xfer_size = MIC_DMA_MAX_XFER_SIZE_CARD;
+ }
+ ret = mic_dma_init(mic_dma_dev, owner);
+ if (ret)
+ goto init_error;
+ ret = mic_dma_register_dma_device(mic_dma_dev, owner);
+ if (ret)
+ goto reg_error;
+ return mic_dma_dev;
+reg_error:
+ mic_dma_uninit(mic_dma_dev);
+init_error:
+ kfree(mic_dma_dev);
+ mic_dma_dev = NULL;
+alloc_error:
+ dev_err(dev, "Error at %s %d ret=%d\n", __func__, __LINE__, ret);
+ return mic_dma_dev;
+}
+
+static void mic_dma_dev_unreg(struct mic_dma_device *mic_dma_dev)
+{
+ mic_dma_unregister_dma_device(mic_dma_dev);
+ mic_dma_uninit(mic_dma_dev);
+ kfree(mic_dma_dev);
+}
+
+/* DEBUGFS CODE */
+static int mic_dma_reg_seq_show(struct seq_file *s, void *pos)
+{
+ struct mic_dma_device *mic_dma_dev = s->private;
+ int i, chan_num, first_chan = mic_dma_dev->start_ch;
+ struct mic_dma_chan *ch;
+
+ seq_printf(s, "SBOX_DCR: %#x\n",
+ mic_dma_mmio_read(&mic_dma_dev->mic_ch[first_chan],
+ MIC_DMA_SBOX_BASE + MIC_DMA_SBOX_DCR));
+ seq_puts(s, "DMA Channel Registers\n");
+ seq_printf(s, "%-10s| %-10s %-10s %-10s %-10s %-10s",
+ "Channel", "DCAR", "DTPR", "DHPR", "DRAR_HI", "DRAR_LO");
+ seq_printf(s, " %-11s %-14s %-10s\n", "DCHERR", "DCHERRMSK", "DSTAT");
+ for (i = first_chan; i < first_chan + MIC_DMA_NUM_CHAN; i++) {
+ ch = &mic_dma_dev->mic_ch[i];
+ chan_num = ch->ch_num;
+ seq_printf(s, "%-10i| %-#10x %-#10x %-#10x %-#10x",
+ chan_num,
+ mic_dma_read_reg(ch, MIC_DMA_REG_DCAR),
+ mic_dma_read_reg(ch, MIC_DMA_REG_DTPR),
+ mic_dma_read_reg(ch, MIC_DMA_REG_DHPR),
+ mic_dma_read_reg(ch, MIC_DMA_REG_DRAR_HI));
+ seq_printf(s, " %-#10x %-#10x %-#14x %-#10x\n",
+ mic_dma_read_reg(ch, MIC_DMA_REG_DRAR_LO),
+ mic_dma_read_reg(ch, MIC_DMA_REG_DCHERR),
+ mic_dma_read_reg(ch, MIC_DMA_REG_DCHERRMSK),
+ mic_dma_read_reg(ch, MIC_DMA_REG_DSTAT));
+ }
+ return 0;
+}
+
+static int mic_dma_reg_debug_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, mic_dma_reg_seq_show, inode->i_private);
+}
+
+static int mic_dma_reg_debug_release(struct inode *inode, struct file *file)
+{
+ return single_release(inode, file);
+}
+
+static const struct file_operations mic_dma_reg_ops = {
+ .owner = THIS_MODULE,
+ .open = mic_dma_reg_debug_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = mic_dma_reg_debug_release
+};
+
+/* Debugfs parent dir */
+static struct dentry *mic_dma_dbg;
+
+static int mic_dma_driver_probe(struct mbus_device *mbdev)
+{
+ struct mic_dma_device *mic_dma_dev;
+ enum mic_dma_chan_owner owner;
+
+ if (MBUS_DEV_DMA_MIC == mbdev->id.device)
+ owner = MIC_DMA_CHAN_MIC;
+ else
+ owner = MIC_DMA_CHAN_HOST;
+
+ mic_dma_dev = mic_dma_dev_reg(mbdev, owner);
+ dev_set_drvdata(&mbdev->dev, mic_dma_dev);
+
+ if (mic_dma_dbg) {
+ mic_dma_dev->dbg_dir = debugfs_create_dir(dev_name(&mbdev->dev),
+ mic_dma_dbg);
+ if (mic_dma_dev->dbg_dir)
+ debugfs_create_file("mic_dma_reg", 0444,
+ mic_dma_dev->dbg_dir, mic_dma_dev,
+ &mic_dma_reg_ops);
+ }
+ return 0;
+}
+
+static void mic_dma_driver_remove(struct mbus_device *mbdev)
+{
+ struct mic_dma_device *mic_dma_dev;
+
+ mic_dma_dev = dev_get_drvdata(&mbdev->dev);
+ debugfs_remove_recursive(mic_dma_dev->dbg_dir);
+ mic_dma_dev_unreg(mic_dma_dev);
+}
+
+static struct mbus_device_id id_table[] = {
+ {MBUS_DEV_DMA_MIC, MBUS_DEV_ANY_ID},
+ {MBUS_DEV_DMA_HOST, MBUS_DEV_ANY_ID},
+ {0},
+};
+
+static struct mbus_driver mic_dma_driver = {
+ .driver.name = KBUILD_MODNAME,
+ .driver.owner = THIS_MODULE,
+ .id_table = id_table,
+ .probe = mic_dma_driver_probe,
+ .remove = mic_dma_driver_remove,
+};
+
+static int __init mic_x100_dma_init(void)
+{
+ int rc = mbus_register_driver(&mic_dma_driver);
+ if (rc)
+ return rc;
+ mic_dma_dbg = debugfs_create_dir(KBUILD_MODNAME, NULL);
+ return 0;
+}
+
+static void __exit mic_x100_dma_exit(void)
+{
+ debugfs_remove_recursive(mic_dma_dbg);
+ mbus_unregister_driver(&mic_dma_driver);
+}
+
+module_init(mic_x100_dma_init);
+module_exit(mic_x100_dma_exit);
+
+MODULE_DEVICE_TABLE(mbus, id_table);
+MODULE_AUTHOR("Intel Corporation");
+MODULE_DESCRIPTION("Intel(R) MIC X100 DMA Driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/dma/mic_x100_dma.h b/drivers/dma/mic_x100_dma.h
new file mode 100644
index 000000000000..f663b0bdd11d
--- /dev/null
+++ b/drivers/dma/mic_x100_dma.h
@@ -0,0 +1,286 @@
+/*
+ * Intel MIC Platform Software Stack (MPSS)
+ *
+ * Copyright(c) 2014 Intel Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License, version 2, as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * The full GNU General Public License is included in this distribution in
+ * the file called "COPYING".
+ *
+ * Intel MIC X100 DMA Driver.
+ *
+ * Adapted from IOAT dma driver.
+ */
+#ifndef _MIC_X100_DMA_H_
+#define _MIC_X100_DMA_H_
+
+#include <linux/kernel.h>
+#include <linux/delay.h>
+#include <linux/sched.h>
+#include <linux/debugfs.h>
+#include <linux/slab.h>
+#include <linux/interrupt.h>
+#include <linux/mic_bus.h>
+
+#include "dmaengine.h"
+
+/*
+ * MIC has a total of 8 dma channels.
+ * Four channels are assigned for host SW use & the remaining for MIC SW.
+ * MIC DMA transfer size & addresses need to be 64 byte aligned.
+ */
+#define MIC_DMA_MAX_NUM_CHAN 8
+#define MIC_DMA_NUM_CHAN 4
+#define MIC_DMA_ALIGN_SHIFT 6
+#define MIC_DMA_ALIGN_BYTES (1 << MIC_DMA_ALIGN_SHIFT)
+#define MIC_DMA_DESC_RX_SIZE (128 * 1024 - 4)
+
+/*
+ * Register descriptions
+ * All the registers are 32 bit registers.
+ * DCR is a global register and all others are per-channel.
+ * DCR - bits 0, 2, 4, 6, 8, 10, 12, 14 - enable bits for channels 0 to 7
+ * bits 1, 3, 5, 7, 9, 11, 13, 15 - owner bits for channels 0 to 7
+ * DCAR - bit 24 & 25 interrupt masks for mic owned & host owned channels
+ * DHPR - head of the descriptor ring updated by s/w
+ * DTPR - tail of the descriptor ring updated by h/w
+ * DRAR_LO - lower 32 bits of descriptor ring's mic address
+ * DRAR_HI - 3:0 - remaining 4 bits of descriptor ring's mic address
+ * 20:4 descriptor ring size
+ * 25:21 mic smpt entry number
+ * DSTAT - 16:0 h/w completion count; 31:28 dma engine status
+ * DCHERR - this register is non-zero on error
+ * DCHERRMSK - interrupt mask register
+ */
+#define MIC_DMA_HW_CMP_CNT_MASK 0x1ffff
+#define MIC_DMA_CHAN_QUIESCE 0x20000000
+#define MIC_DMA_SBOX_BASE 0x00010000
+#define MIC_DMA_SBOX_DCR 0x0000A280
+#define MIC_DMA_SBOX_CH_BASE 0x0001A000
+#define MIC_DMA_SBOX_CHAN_OFF 0x40
+#define MIC_DMA_SBOX_DCAR_IM0 (0x1 << 24)
+#define MIC_DMA_SBOX_DCAR_IM1 (0x1 << 25)
+#define MIC_DMA_SBOX_DRARHI_SYS_MASK (0x1 << 26)
+#define MIC_DMA_REG_DCAR 0
+#define MIC_DMA_REG_DHPR 4
+#define MIC_DMA_REG_DTPR 8
+#define MIC_DMA_REG_DRAR_LO 20
+#define MIC_DMA_REG_DRAR_HI 24
+#define MIC_DMA_REG_DSTAT 32
+#define MIC_DMA_REG_DCHERR 44
+#define MIC_DMA_REG_DCHERRMSK 48
+
+/* HW dma desc */
+struct mic_dma_desc {
+ u64 qw0;
+ u64 qw1;
+};
+
+enum mic_dma_chan_owner {
+ MIC_DMA_CHAN_MIC = 0,
+ MIC_DMA_CHAN_HOST
+};
+
+/*
+ * mic_dma_chan - channel specific information
+ * @ch_num: channel number
+ * @owner: owner of this channel
+ * @last_tail: cached value of descriptor ring tail
+ * @head: index of next descriptor in desc_ring
+ * @issued: hardware notification point
+ * @submitted: index that will be used to submit descriptors to h/w
+ * @api_ch: dma engine api channel
+ * @desc_ring: dma descriptor ring
+ * @desc_ring_micpa: mic physical address of desc_ring
+ * @status_dest: destination for status (fence) descriptor
+ * @status_dest_micpa: mic address for status_dest,
+ * DMA controller uses this address
+ * @tx_array: array of async_tx
+ * @cleanup_lock: lock held when processing completed tx
+ * @prep_lock: lock held in prep_memcpy & released in tx_submit
+ * @issue_lock: lock used to synchronize writes to head
+ * @cookie: mic_irq cookie used with mic irq request
+ */
+struct mic_dma_chan {
+ int ch_num;
+ enum mic_dma_chan_owner owner;
+ u32 last_tail;
+ u32 head;
+ u32 issued;
+ u32 submitted;
+ struct dma_chan api_ch;
+ struct mic_dma_desc *desc_ring;
+ dma_addr_t desc_ring_micpa;
+ u64 *status_dest;
+ dma_addr_t status_dest_micpa;
+ struct dma_async_tx_descriptor *tx_array;
+ spinlock_t cleanup_lock;
+ spinlock_t prep_lock;
+ spinlock_t issue_lock;
+ struct mic_irq *cookie;
+};
+
+/*
+ * struct mic_dma_device - per mic device
+ * @mic_ch: dma channels
+ * @dma_dev: underlying dma device
+ * @mbdev: mic bus dma device
+ * @mmio: virtual address of the mmio space
+ * @dbg_dir: debugfs directory
+ * @start_ch: first channel number that can be used
+ * @max_xfer_size: maximum transfer size per dma descriptor
+ */
+struct mic_dma_device {
+ struct mic_dma_chan mic_ch[MIC_DMA_MAX_NUM_CHAN];
+ struct dma_device dma_dev;
+ struct mbus_device *mbdev;
+ void __iomem *mmio;
+ struct dentry *dbg_dir;
+ int start_ch;
+ size_t max_xfer_size;
+};
+
+static inline struct mic_dma_chan *to_mic_dma_chan(struct dma_chan *ch)
+{
+ return container_of(ch, struct mic_dma_chan, api_ch);
+}
+
+static inline struct mic_dma_device *to_mic_dma_dev(struct mic_dma_chan *ch)
+{
+ return
+ container_of((const typeof(((struct mic_dma_device *)0)->mic_ch)*)
+ (ch - ch->ch_num), struct mic_dma_device, mic_ch);
+}
+
+static inline struct mbus_device *to_mbus_device(struct mic_dma_chan *ch)
+{
+ return to_mic_dma_dev(ch)->mbdev;
+}
+
+static inline struct mbus_hw_ops *to_mbus_hw_ops(struct mic_dma_chan *ch)
+{
+ return to_mbus_device(ch)->hw_ops;
+}
+
+static inline struct device *mic_dma_ch_to_device(struct mic_dma_chan *ch)
+{
+ return to_mic_dma_dev(ch)->dma_dev.dev;
+}
+
+static inline void __iomem *mic_dma_chan_to_mmio(struct mic_dma_chan *ch)
+{
+ return to_mic_dma_dev(ch)->mmio;
+}
+
+static inline u32 mic_dma_read_reg(struct mic_dma_chan *ch, u32 reg)
+{
+ return ioread32(mic_dma_chan_to_mmio(ch) + MIC_DMA_SBOX_CH_BASE +
+ ch->ch_num * MIC_DMA_SBOX_CHAN_OFF + reg);
+}
+
+static inline void mic_dma_write_reg(struct mic_dma_chan *ch, u32 reg, u32 val)
+{
+ iowrite32(val, mic_dma_chan_to_mmio(ch) + MIC_DMA_SBOX_CH_BASE +
+ ch->ch_num * MIC_DMA_SBOX_CHAN_OFF + reg);
+}
+
+static inline u32 mic_dma_mmio_read(struct mic_dma_chan *ch, u32 offset)
+{
+ return ioread32(mic_dma_chan_to_mmio(ch) + offset);
+}
+
+static inline void mic_dma_mmio_write(struct mic_dma_chan *ch, u32 val,
+ u32 offset)
+{
+ iowrite32(val, mic_dma_chan_to_mmio(ch) + offset);
+}
+
+static inline u32 mic_dma_read_cmp_cnt(struct mic_dma_chan *ch)
+{
+ return mic_dma_read_reg(ch, MIC_DMA_REG_DSTAT) &
+ MIC_DMA_HW_CMP_CNT_MASK;
+}
+
+static inline void mic_dma_chan_set_owner(struct mic_dma_chan *ch)
+{
+ u32 dcr = mic_dma_mmio_read(ch, MIC_DMA_SBOX_BASE + MIC_DMA_SBOX_DCR);
+ u32 chan_num = ch->ch_num;
+
+ dcr = (dcr & ~(0x1 << (chan_num * 2))) | (ch->owner << (chan_num * 2));
+ mic_dma_mmio_write(ch, dcr, MIC_DMA_SBOX_BASE + MIC_DMA_SBOX_DCR);
+}
+
+static inline void mic_dma_enable_chan(struct mic_dma_chan *ch)
+{
+ u32 dcr = mic_dma_mmio_read(ch, MIC_DMA_SBOX_BASE + MIC_DMA_SBOX_DCR);
+
+ dcr |= 2 << (ch->ch_num << 1);
+ mic_dma_mmio_write(ch, dcr, MIC_DMA_SBOX_BASE + MIC_DMA_SBOX_DCR);
+}
+
+static inline void mic_dma_disable_chan(struct mic_dma_chan *ch)
+{
+ u32 dcr = mic_dma_mmio_read(ch, MIC_DMA_SBOX_BASE + MIC_DMA_SBOX_DCR);
+
+ dcr &= ~(2 << (ch->ch_num << 1));
+ mic_dma_mmio_write(ch, dcr, MIC_DMA_SBOX_BASE + MIC_DMA_SBOX_DCR);
+}
+
+static void mic_dma_chan_set_desc_ring(struct mic_dma_chan *ch)
+{
+ u32 drar_hi;
+ dma_addr_t desc_ring_micpa = ch->desc_ring_micpa;
+
+ drar_hi = (MIC_DMA_DESC_RX_SIZE & 0x1ffff) << 4;
+ if (MIC_DMA_CHAN_MIC == ch->owner) {
+ drar_hi |= (desc_ring_micpa >> 32) & 0xf;
+ } else {
+ drar_hi |= MIC_DMA_SBOX_DRARHI_SYS_MASK;
+ drar_hi |= ((desc_ring_micpa >> 34)
+ & 0x1f) << 21;
+ drar_hi |= (desc_ring_micpa >> 32) & 0x3;
+ }
+ mic_dma_write_reg(ch, MIC_DMA_REG_DRAR_LO, (u32) desc_ring_micpa);
+ mic_dma_write_reg(ch, MIC_DMA_REG_DRAR_HI, drar_hi);
+}
+
+static inline void mic_dma_chan_mask_intr(struct mic_dma_chan *ch)
+{
+ u32 dcar = mic_dma_read_reg(ch, MIC_DMA_REG_DCAR);
+
+ if (MIC_DMA_CHAN_MIC == ch->owner)
+ dcar |= MIC_DMA_SBOX_DCAR_IM0;
+ else
+ dcar |= MIC_DMA_SBOX_DCAR_IM1;
+ mic_dma_write_reg(ch, MIC_DMA_REG_DCAR, dcar);
+}
+
+static inline void mic_dma_chan_unmask_intr(struct mic_dma_chan *ch)
+{
+ u32 dcar = mic_dma_read_reg(ch, MIC_DMA_REG_DCAR);
+
+ if (MIC_DMA_CHAN_MIC == ch->owner)
+ dcar &= ~MIC_DMA_SBOX_DCAR_IM0;
+ else
+ dcar &= ~MIC_DMA_SBOX_DCAR_IM1;
+ mic_dma_write_reg(ch, MIC_DMA_REG_DCAR, dcar);
+}
+
+static void mic_dma_ack_interrupt(struct mic_dma_chan *ch)
+{
+ if (MIC_DMA_CHAN_MIC == ch->owner) {
+ /* HW errata */
+ mic_dma_chan_mask_intr(ch);
+ mic_dma_chan_unmask_intr(ch);
+ }
+ to_mbus_hw_ops(ch)->ack_interrupt(to_mbus_device(ch), ch->ch_num);
+}
+#endif
diff --git a/drivers/extcon/Kconfig b/drivers/extcon/Kconfig
index aebde489c291..6f2f4727de2c 100644
--- a/drivers/extcon/Kconfig
+++ b/drivers/extcon/Kconfig
@@ -14,6 +14,20 @@ if EXTCON
comment "Extcon Device Drivers"
+config EXTCON_ADC_JACK
+ tristate "ADC Jack extcon support"
+ depends on IIO
+ help
+ Say Y here to enable extcon device driver based on ADC values.
+
+config EXTCON_ARIZONA
+ tristate "Wolfson Arizona EXTCON support"
+ depends on MFD_ARIZONA && INPUT && SND_SOC
+ help
+ Say Y here to enable support for external accessory detection
+ with Wolfson Arizona devices. These are audio CODECs with
+ advanced audio accessory detection support.
+
config EXTCON_GPIO
tristate "GPIO extcon support"
depends on GPIOLIB
@@ -21,12 +35,6 @@ config EXTCON_GPIO
Say Y here to enable GPIO based extcon support. Note that GPIO
extcon supports single state per extcon instance.
-config EXTCON_ADC_JACK
- tristate "ADC Jack extcon support"
- depends on IIO
- help
- Say Y here to enable extcon device driver based on ADC values.
-
config EXTCON_MAX14577
tristate "MAX14577/77836 EXTCON Support"
depends on MFD_MAX14577
@@ -55,14 +63,6 @@ config EXTCON_MAX8997
Maxim MAX8997 PMIC. The MAX8997 MUIC is a USB port accessory
detector and switch.
-config EXTCON_ARIZONA
- tristate "Wolfson Arizona EXTCON support"
- depends on MFD_ARIZONA && INPUT && SND_SOC
- help
- Say Y here to enable support for external accessory detection
- with Wolfson Arizona devices. These are audio CODECs with
- advanced audio accessory detection support.
-
config EXTCON_PALMAS
tristate "Palmas USB EXTCON support"
depends on MFD_PALMAS
@@ -70,4 +70,14 @@ config EXTCON_PALMAS
Say Y here to enable support for USB peripheral and USB host
detection by palmas usb.
+config EXTCON_SM5502
+ tristate "SM5502 EXTCON support"
+ select IRQ_DOMAIN
+ select REGMAP_I2C
+ select REGMAP_IRQ
+ help
+ If you say yes here you get support for the MUIC device of
+ Silicon Mitus SM5502. The SM5502 is a USB port accessory
+ detector and switch.
+
endif # MULTISTATE_SWITCH
diff --git a/drivers/extcon/Makefile b/drivers/extcon/Makefile
index bf7861ec0906..b38546eb522a 100644
--- a/drivers/extcon/Makefile
+++ b/drivers/extcon/Makefile
@@ -1,12 +1,13 @@
-#
+
# Makefile for external connector class (extcon) devices
#
obj-$(CONFIG_EXTCON) += extcon-class.o
-obj-$(CONFIG_EXTCON_GPIO) += extcon-gpio.o
obj-$(CONFIG_EXTCON_ADC_JACK) += extcon-adc-jack.o
+obj-$(CONFIG_EXTCON_ARIZONA) += extcon-arizona.o
+obj-$(CONFIG_EXTCON_GPIO) += extcon-gpio.o
obj-$(CONFIG_EXTCON_MAX14577) += extcon-max14577.o
obj-$(CONFIG_EXTCON_MAX77693) += extcon-max77693.o
obj-$(CONFIG_EXTCON_MAX8997) += extcon-max8997.o
-obj-$(CONFIG_EXTCON_ARIZONA) += extcon-arizona.o
obj-$(CONFIG_EXTCON_PALMAS) += extcon-palmas.o
+obj-$(CONFIG_EXTCON_SM5502) += extcon-sm5502.o
diff --git a/drivers/extcon/extcon-adc-jack.c b/drivers/extcon/extcon-adc-jack.c
index e18f95be3733..d860229e4de1 100644
--- a/drivers/extcon/extcon-adc-jack.c
+++ b/drivers/extcon/extcon-adc-jack.c
@@ -112,7 +112,6 @@ static int adc_jack_probe(struct platform_device *pdev)
dev_err(&pdev->dev, "failed to allocate extcon device\n");
return -ENOMEM;
}
- data->edev->dev.parent = &pdev->dev;
data->edev->name = pdata->name;
/* Check the length of array and set num_cables */
diff --git a/drivers/extcon/extcon-arizona.c b/drivers/extcon/extcon-arizona.c
index 6c84e3d12043..ba51588cc000 100644
--- a/drivers/extcon/extcon-arizona.c
+++ b/drivers/extcon/extcon-arizona.c
@@ -39,6 +39,11 @@
#define ARIZONA_ACCDET_MODE_HPL 1
#define ARIZONA_ACCDET_MODE_HPR 2
+#define ARIZONA_MICD_CLAMP_MODE_JDL 0x4
+#define ARIZONA_MICD_CLAMP_MODE_JDH 0x5
+#define ARIZONA_MICD_CLAMP_MODE_JDL_GP5H 0x9
+#define ARIZONA_MICD_CLAMP_MODE_JDH_GP5H 0xb
+
#define ARIZONA_HPDET_MAX 10000
#define HPDET_DEBOUNCE 500
@@ -324,14 +329,17 @@ static void arizona_stop_mic(struct arizona_extcon_info *info)
}
static struct {
+ unsigned int threshold;
unsigned int factor_a;
unsigned int factor_b;
} arizona_hpdet_b_ranges[] = {
- { 5528, 362464 },
- { 11084, 6186851 },
- { 11065, 65460395 },
+ { 100, 5528, 362464 },
+ { 169, 11084, 6186851 },
+ { 169, 11065, 65460395 },
};
+#define ARIZONA_HPDET_B_RANGE_MAX 0x3fb
+
static struct {
int min;
int max;
@@ -386,7 +394,8 @@ static int arizona_hpdet_read(struct arizona_extcon_info *info)
>> ARIZONA_HP_IMPEDANCE_RANGE_SHIFT;
if (range < ARRAY_SIZE(arizona_hpdet_b_ranges) - 1 &&
- (val < 100 || val >= 0x3fb)) {
+ (val < arizona_hpdet_b_ranges[range].threshold ||
+ val >= ARIZONA_HPDET_B_RANGE_MAX)) {
range++;
dev_dbg(arizona->dev, "Moving to HPDET range %d\n",
range);
@@ -399,7 +408,8 @@ static int arizona_hpdet_read(struct arizona_extcon_info *info)
}
/* If we go out of range report top of range */
- if (val < 100 || val >= 0x3fb) {
+ if (val < arizona_hpdet_b_ranges[range].threshold ||
+ val >= ARIZONA_HPDET_B_RANGE_MAX) {
dev_dbg(arizona->dev, "Measurement out of range\n");
return ARIZONA_HPDET_MAX;
}
@@ -664,9 +674,8 @@ err:
ARIZONA_ACCDET_MODE_MASK, ARIZONA_ACCDET_MODE_MIC);
/* Just report headphone */
- ret = extcon_update_state(info->edev,
- 1 << ARIZONA_CABLE_HEADPHONE,
- 1 << ARIZONA_CABLE_HEADPHONE);
+ ret = extcon_set_cable_state_(info->edev,
+ ARIZONA_CABLE_HEADPHONE, true);
if (ret != 0)
dev_err(arizona->dev, "Failed to report headphone: %d\n", ret);
@@ -723,9 +732,8 @@ err:
ARIZONA_ACCDET_MODE_MASK, ARIZONA_ACCDET_MODE_MIC);
/* Just report headphone */
- ret = extcon_update_state(info->edev,
- 1 << ARIZONA_CABLE_HEADPHONE,
- 1 << ARIZONA_CABLE_HEADPHONE);
+ ret = extcon_set_cable_state_(info->edev,
+ ARIZONA_CABLE_HEADPHONE, true);
if (ret != 0)
dev_err(arizona->dev, "Failed to report headphone: %d\n", ret);
@@ -812,16 +820,15 @@ static void arizona_micd_detect(struct work_struct *work)
if (info->detecting && (val & ARIZONA_MICD_LVL_8)) {
arizona_identify_headphone(info);
- ret = extcon_update_state(info->edev,
- 1 << ARIZONA_CABLE_MICROPHONE,
- 1 << ARIZONA_CABLE_MICROPHONE);
+ ret = extcon_set_cable_state_(info->edev,
+ ARIZONA_CABLE_MICROPHONE, true);
if (ret != 0)
dev_err(arizona->dev, "Headset report failed: %d\n",
ret);
/* Don't need to regulate for button detection */
- ret = regulator_allow_bypass(info->micvdd, false);
+ ret = regulator_allow_bypass(info->micvdd, true);
if (ret != 0) {
dev_err(arizona->dev, "Failed to bypass MICVDD: %d\n",
ret);
@@ -962,10 +969,16 @@ static irqreturn_t arizona_jackdet(int irq, void *data)
if (arizona->pdata.jd_gpio5) {
mask = ARIZONA_MICD_CLAMP_STS;
- present = 0;
+ if (arizona->pdata.jd_invert)
+ present = ARIZONA_MICD_CLAMP_STS;
+ else
+ present = 0;
} else {
mask = ARIZONA_JD1_STS;
- present = ARIZONA_JD1_STS;
+ if (arizona->pdata.jd_invert)
+ present = 0;
+ else
+ present = ARIZONA_JD1_STS;
}
ret = regmap_read(arizona->regmap, ARIZONA_AOD_IRQ_RAW_STATUS, &val);
@@ -1096,6 +1109,7 @@ static int arizona_extcon_probe(struct platform_device *pdev)
struct arizona_pdata *pdata = &arizona->pdata;
struct arizona_extcon_info *info;
unsigned int val;
+ unsigned int clamp_mode;
int jack_irq_fall, jack_irq_rise;
int ret, mode, i, j;
@@ -1103,12 +1117,10 @@ static int arizona_extcon_probe(struct platform_device *pdev)
return -EPROBE_DEFER;
info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL);
- if (!info) {
- dev_err(&pdev->dev, "Failed to allocate memory\n");
+ if (!info)
return -ENOMEM;
- }
- info->micvdd = devm_regulator_get(arizona->dev, "MICVDD");
+ info->micvdd = devm_regulator_get(&pdev->dev, "MICVDD");
if (IS_ERR(info->micvdd)) {
ret = PTR_ERR(info->micvdd);
dev_err(arizona->dev, "Failed to get MICVDD: %d\n", ret);
@@ -1156,7 +1168,6 @@ static int arizona_extcon_probe(struct platform_device *pdev)
return -ENOMEM;
}
info->edev->name = "Headset Jack";
- info->edev->dev.parent = arizona->dev;
ret = devm_extcon_dev_register(&pdev->dev, info->edev);
if (ret < 0) {
@@ -1174,7 +1185,6 @@ static int arizona_extcon_probe(struct platform_device *pdev)
info->input->name = "Headset";
info->input->phys = "arizona/extcon";
- info->input->dev.parent = &pdev->dev;
if (pdata->num_micd_configs) {
info->micd_modes = pdata->micd_configs;
@@ -1305,16 +1315,22 @@ static int arizona_extcon_probe(struct platform_device *pdev)
regmap_write(arizona->regmap, ARIZONA_GPIO5_CTRL,
val);
- regmap_update_bits(arizona->regmap,
- ARIZONA_MICD_CLAMP_CONTROL,
- ARIZONA_MICD_CLAMP_MODE_MASK, 0x9);
+ if (arizona->pdata.jd_invert)
+ clamp_mode = ARIZONA_MICD_CLAMP_MODE_JDH_GP5H;
+ else
+ clamp_mode = ARIZONA_MICD_CLAMP_MODE_JDL_GP5H;
} else {
- regmap_update_bits(arizona->regmap,
- ARIZONA_MICD_CLAMP_CONTROL,
- ARIZONA_MICD_CLAMP_MODE_MASK, 0x4);
+ if (arizona->pdata.jd_invert)
+ clamp_mode = ARIZONA_MICD_CLAMP_MODE_JDH;
+ else
+ clamp_mode = ARIZONA_MICD_CLAMP_MODE_JDL;
}
regmap_update_bits(arizona->regmap,
+ ARIZONA_MICD_CLAMP_CONTROL,
+ ARIZONA_MICD_CLAMP_MODE_MASK, clamp_mode);
+
+ regmap_update_bits(arizona->regmap,
ARIZONA_JACK_DETECT_DEBOUNCE,
ARIZONA_MICD_CLAMP_DB,
ARIZONA_MICD_CLAMP_DB);
diff --git a/drivers/extcon/extcon-class.c b/drivers/extcon/extcon-class.c
index 18d42c0e4581..4c2f2c543bb7 100644
--- a/drivers/extcon/extcon-class.c
+++ b/drivers/extcon/extcon-class.c
@@ -645,6 +645,8 @@ struct extcon_dev *devm_extcon_dev_allocate(struct device *dev,
return edev;
}
+ edev->dev.parent = dev;
+
*ptr = edev;
devres_add(dev, ptr);
diff --git a/drivers/extcon/extcon-gpio.c b/drivers/extcon/extcon-gpio.c
index 645b28356819..5b7ec274cb63 100644
--- a/drivers/extcon/extcon-gpio.c
+++ b/drivers/extcon/extcon-gpio.c
@@ -105,7 +105,6 @@ static int gpio_extcon_probe(struct platform_device *pdev)
return -ENOMEM;
}
extcon_data->edev->name = pdata->name;
- extcon_data->edev->dev.parent = &pdev->dev;
extcon_data->gpio = pdata->gpio;
extcon_data->gpio_active_low = pdata->gpio_active_low;
diff --git a/drivers/extcon/extcon-max14577.c b/drivers/extcon/extcon-max14577.c
index d49e891b5675..7309743d0da1 100644
--- a/drivers/extcon/extcon-max14577.c
+++ b/drivers/extcon/extcon-max14577.c
@@ -692,10 +692,9 @@ static int max14577_muic_probe(struct platform_device *pdev)
u8 id;
info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL);
- if (!info) {
- dev_err(&pdev->dev, "failed to allocate memory\n");
+ if (!info)
return -ENOMEM;
- }
+
info->dev = &pdev->dev;
info->max14577 = max14577;
diff --git a/drivers/extcon/extcon-max77693.c b/drivers/extcon/extcon-max77693.c
index 2c7c3e191591..77460f2c1ca1 100644
--- a/drivers/extcon/extcon-max77693.c
+++ b/drivers/extcon/extcon-max77693.c
@@ -255,10 +255,10 @@ static int max77693_muic_set_debounce_time(struct max77693_muic_info *info,
case ADC_DEBOUNCE_TIME_10MS:
case ADC_DEBOUNCE_TIME_25MS:
case ADC_DEBOUNCE_TIME_38_62MS:
- ret = max77693_update_reg(info->max77693->regmap_muic,
+ ret = regmap_update_bits(info->max77693->regmap_muic,
MAX77693_MUIC_REG_CTRL3,
- time << CONTROL3_ADCDBSET_SHIFT,
- CONTROL3_ADCDBSET_MASK);
+ CONTROL3_ADCDBSET_MASK,
+ time << CONTROL3_ADCDBSET_SHIFT);
if (ret) {
dev_err(info->dev, "failed to set ADC debounce time\n");
return ret;
@@ -286,15 +286,15 @@ static int max77693_muic_set_path(struct max77693_muic_info *info,
u8 val, bool attached)
{
int ret = 0;
- u8 ctrl1, ctrl2 = 0;
+ unsigned int ctrl1, ctrl2 = 0;
if (attached)
ctrl1 = val;
else
ctrl1 = CONTROL1_SW_OPEN;
- ret = max77693_update_reg(info->max77693->regmap_muic,
- MAX77693_MUIC_REG_CTRL1, ctrl1, COMP_SW_MASK);
+ ret = regmap_update_bits(info->max77693->regmap_muic,
+ MAX77693_MUIC_REG_CTRL1, COMP_SW_MASK, ctrl1);
if (ret < 0) {
dev_err(info->dev, "failed to update MUIC register\n");
return ret;
@@ -305,9 +305,9 @@ static int max77693_muic_set_path(struct max77693_muic_info *info,
else
ctrl2 |= CONTROL2_LOWPWR_MASK; /* LowPwr=1, CPEn=0 */
- ret = max77693_update_reg(info->max77693->regmap_muic,
- MAX77693_MUIC_REG_CTRL2, ctrl2,
- CONTROL2_LOWPWR_MASK | CONTROL2_CPEN_MASK);
+ ret = regmap_update_bits(info->max77693->regmap_muic,
+ MAX77693_MUIC_REG_CTRL2,
+ CONTROL2_LOWPWR_MASK | CONTROL2_CPEN_MASK, ctrl2);
if (ret < 0) {
dev_err(info->dev, "failed to update MUIC register\n");
return ret;
@@ -969,8 +969,8 @@ static void max77693_muic_irq_work(struct work_struct *work)
if (info->irq == muic_irqs[i].virq)
irq_type = muic_irqs[i].irq;
- ret = max77693_bulk_read(info->max77693->regmap_muic,
- MAX77693_MUIC_REG_STATUS1, 2, info->status);
+ ret = regmap_bulk_read(info->max77693->regmap_muic,
+ MAX77693_MUIC_REG_STATUS1, info->status, 2);
if (ret) {
dev_err(info->dev, "failed to read MUIC register\n");
mutex_unlock(&info->mutex);
@@ -1042,8 +1042,8 @@ static int max77693_muic_detect_accessory(struct max77693_muic_info *info)
mutex_lock(&info->mutex);
/* Read STATUSx register to detect accessory */
- ret = max77693_bulk_read(info->max77693->regmap_muic,
- MAX77693_MUIC_REG_STATUS1, 2, info->status);
+ ret = regmap_bulk_read(info->max77693->regmap_muic,
+ MAX77693_MUIC_REG_STATUS1, info->status, 2);
if (ret) {
dev_err(info->dev, "failed to read MUIC register\n");
mutex_unlock(&info->mutex);
@@ -1095,14 +1095,13 @@ static int max77693_muic_probe(struct platform_device *pdev)
int delay_jiffies;
int ret;
int i;
- u8 id;
+ unsigned int id;
info = devm_kzalloc(&pdev->dev, sizeof(struct max77693_muic_info),
GFP_KERNEL);
- if (!info) {
- dev_err(&pdev->dev, "failed to allocate memory\n");
+ if (!info)
return -ENOMEM;
- }
+
info->dev = &pdev->dev;
info->max77693 = max77693;
if (info->max77693->regmap_muic) {
@@ -1154,7 +1153,8 @@ static int max77693_muic_probe(struct platform_device *pdev)
struct max77693_muic_irq *muic_irq = &muic_irqs[i];
unsigned int virq = 0;
- virq = irq_create_mapping(max77693->irq_domain, muic_irq->irq);
+ virq = regmap_irq_get_virq(max77693->irq_data_muic,
+ muic_irq->irq);
if (!virq) {
ret = -EINVAL;
goto err_irq;
@@ -1183,7 +1183,6 @@ static int max77693_muic_probe(struct platform_device *pdev)
goto err_irq;
}
info->edev->name = DEV_NAME;
- info->edev->dev.parent = &pdev->dev;
ret = devm_extcon_dev_register(&pdev->dev, info->edev);
if (ret) {
@@ -1204,7 +1203,7 @@ static int max77693_muic_probe(struct platform_device *pdev)
enum max77693_irq_source irq_src
= MAX77693_IRQ_GROUP_NR;
- max77693_write_reg(info->max77693->regmap_muic,
+ regmap_write(info->max77693->regmap_muic,
init_data[i].addr,
init_data[i].data);
@@ -1262,7 +1261,7 @@ static int max77693_muic_probe(struct platform_device *pdev)
max77693_muic_set_path(info, info->path_uart, true);
/* Check revision number of MUIC device*/
- ret = max77693_read_reg(info->max77693->regmap_muic,
+ ret = regmap_read(info->max77693->regmap_muic,
MAX77693_MUIC_REG_ID, &id);
if (ret < 0) {
dev_err(&pdev->dev, "failed to read revision number\n");
diff --git a/drivers/extcon/extcon-max8997.c b/drivers/extcon/extcon-max8997.c
index d9f7f1baaa03..75e501c98005 100644
--- a/drivers/extcon/extcon-max8997.c
+++ b/drivers/extcon/extcon-max8997.c
@@ -661,10 +661,8 @@ static int max8997_muic_probe(struct platform_device *pdev)
info = devm_kzalloc(&pdev->dev, sizeof(struct max8997_muic_info),
GFP_KERNEL);
- if (!info) {
- dev_err(&pdev->dev, "failed to allocate memory\n");
+ if (!info)
return -ENOMEM;
- }
info->dev = &pdev->dev;
info->muic = max8997->muic;
@@ -706,7 +704,6 @@ static int max8997_muic_probe(struct platform_device *pdev)
goto err_irq;
}
info->edev->name = DEV_NAME;
- info->edev->dev.parent = &pdev->dev;
ret = devm_extcon_dev_register(&pdev->dev, info->edev);
if (ret) {
diff --git a/drivers/extcon/extcon-palmas.c b/drivers/extcon/extcon-palmas.c
index 7417ce84eb2d..230e1220ce48 100644
--- a/drivers/extcon/extcon-palmas.c
+++ b/drivers/extcon/extcon-palmas.c
@@ -194,7 +194,6 @@ static int palmas_usb_probe(struct platform_device *pdev)
return -ENOMEM;
}
palmas_usb->edev->name = kstrdup(node->name, GFP_KERNEL);
- palmas_usb->edev->dev.parent = palmas_usb->dev;
palmas_usb->edev->mutually_exclusive = mutually_exclusive;
status = devm_extcon_dev_register(&pdev->dev, palmas_usb->edev);
@@ -278,7 +277,7 @@ static int palmas_usb_resume(struct device *dev)
static SIMPLE_DEV_PM_OPS(palmas_pm_ops, palmas_usb_suspend, palmas_usb_resume);
-static struct of_device_id of_palmas_match_tbl[] = {
+static const struct of_device_id of_palmas_match_tbl[] = {
{ .compatible = "ti,palmas-usb", },
{ .compatible = "ti,palmas-usb-vid", },
{ .compatible = "ti,twl6035-usb", },
diff --git a/drivers/extcon/extcon-sm5502.c b/drivers/extcon/extcon-sm5502.c
new file mode 100644
index 000000000000..560d7dccec7b
--- /dev/null
+++ b/drivers/extcon/extcon-sm5502.c
@@ -0,0 +1,724 @@
+/*
+ * extcon-sm5502.c - Silicon Mitus SM5502 extcon drvier to support USB switches
+ *
+ * Copyright (c) 2014 Samsung Electronics Co., Ltd
+ * Author: Chanwoo Choi <cw00.choi@samsung.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/err.h>
+#include <linux/i2c.h>
+#include <linux/input.h>
+#include <linux/interrupt.h>
+#include <linux/irqdomain.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+#include <linux/slab.h>
+#include <linux/extcon.h>
+#include <linux/extcon/sm5502.h>
+
+#define DELAY_MS_DEFAULT 17000 /* unit: millisecond */
+
+struct muic_irq {
+ unsigned int irq;
+ const char *name;
+ unsigned int virq;
+};
+
+struct reg_data {
+ u8 reg;
+ unsigned int val;
+ bool invert;
+};
+
+struct sm5502_muic_info {
+ struct device *dev;
+ struct extcon_dev *edev;
+
+ struct i2c_client *i2c;
+ struct regmap *regmap;
+
+ struct regmap_irq_chip_data *irq_data;
+ struct muic_irq *muic_irqs;
+ unsigned int num_muic_irqs;
+ int irq;
+ bool irq_attach;
+ bool irq_detach;
+ struct work_struct irq_work;
+
+ struct reg_data *reg_data;
+ unsigned int num_reg_data;
+
+ struct mutex mutex;
+
+ /*
+ * Use delayed workqueue to detect cable state and then
+ * notify cable state to notifiee/platform through uevent.
+ * After completing the booting of platform, the extcon provider
+ * driver should notify cable state to upper layer.
+ */
+ struct delayed_work wq_detcable;
+};
+
+/* Default value of SM5502 register to bring up MUIC device. */
+static struct reg_data sm5502_reg_data[] = {
+ {
+ .reg = SM5502_REG_CONTROL,
+ .val = SM5502_REG_CONTROL_MASK_INT_MASK,
+ .invert = false,
+ }, {
+ .reg = SM5502_REG_INTMASK1,
+ .val = SM5502_REG_INTM1_KP_MASK
+ | SM5502_REG_INTM1_LKP_MASK
+ | SM5502_REG_INTM1_LKR_MASK,
+ .invert = true,
+ }, {
+ .reg = SM5502_REG_INTMASK2,
+ .val = SM5502_REG_INTM2_VBUS_DET_MASK
+ | SM5502_REG_INTM2_REV_ACCE_MASK
+ | SM5502_REG_INTM2_ADC_CHG_MASK
+ | SM5502_REG_INTM2_STUCK_KEY_MASK
+ | SM5502_REG_INTM2_STUCK_KEY_RCV_MASK
+ | SM5502_REG_INTM2_MHL_MASK,
+ .invert = true,
+ },
+ { }
+};
+
+/* List of detectable cables */
+enum {
+ EXTCON_CABLE_USB = 0,
+ EXTCON_CABLE_USB_HOST,
+ EXTCON_CABLE_TA,
+
+ EXTCON_CABLE_END,
+};
+
+static const char *sm5502_extcon_cable[] = {
+ [EXTCON_CABLE_USB] = "USB",
+ [EXTCON_CABLE_USB_HOST] = "USB-Host",
+ [EXTCON_CABLE_TA] = "TA",
+ NULL,
+};
+
+/* Define supported accessory type */
+enum sm5502_muic_acc_type {
+ SM5502_MUIC_ADC_GROUND = 0x0,
+ SM5502_MUIC_ADC_SEND_END_BUTTON,
+ SM5502_MUIC_ADC_REMOTE_S1_BUTTON,
+ SM5502_MUIC_ADC_REMOTE_S2_BUTTON,
+ SM5502_MUIC_ADC_REMOTE_S3_BUTTON,
+ SM5502_MUIC_ADC_REMOTE_S4_BUTTON,
+ SM5502_MUIC_ADC_REMOTE_S5_BUTTON,
+ SM5502_MUIC_ADC_REMOTE_S6_BUTTON,
+ SM5502_MUIC_ADC_REMOTE_S7_BUTTON,
+ SM5502_MUIC_ADC_REMOTE_S8_BUTTON,
+ SM5502_MUIC_ADC_REMOTE_S9_BUTTON,
+ SM5502_MUIC_ADC_REMOTE_S10_BUTTON,
+ SM5502_MUIC_ADC_REMOTE_S11_BUTTON,
+ SM5502_MUIC_ADC_REMOTE_S12_BUTTON,
+ SM5502_MUIC_ADC_RESERVED_ACC_1,
+ SM5502_MUIC_ADC_RESERVED_ACC_2,
+ SM5502_MUIC_ADC_RESERVED_ACC_3,
+ SM5502_MUIC_ADC_RESERVED_ACC_4,
+ SM5502_MUIC_ADC_RESERVED_ACC_5,
+ SM5502_MUIC_ADC_AUDIO_TYPE2,
+ SM5502_MUIC_ADC_PHONE_POWERED_DEV,
+ SM5502_MUIC_ADC_TTY_CONVERTER,
+ SM5502_MUIC_ADC_UART_CABLE,
+ SM5502_MUIC_ADC_TYPE1_CHARGER,
+ SM5502_MUIC_ADC_FACTORY_MODE_BOOT_OFF_USB,
+ SM5502_MUIC_ADC_FACTORY_MODE_BOOT_ON_USB,
+ SM5502_MUIC_ADC_AUDIO_VIDEO_CABLE,
+ SM5502_MUIC_ADC_TYPE2_CHARGER,
+ SM5502_MUIC_ADC_FACTORY_MODE_BOOT_OFF_UART,
+ SM5502_MUIC_ADC_FACTORY_MODE_BOOT_ON_UART,
+ SM5502_MUIC_ADC_AUDIO_TYPE1,
+ SM5502_MUIC_ADC_OPEN = 0x1f,
+
+ /* The below accessories have same ADC value (0x1f or 0x1e).
+ So, Device type1 is used to separate specific accessory. */
+ /* |---------|--ADC| */
+ /* | [7:5]|[4:0]| */
+ SM5502_MUIC_ADC_AUDIO_TYPE1_FULL_REMOTE = 0x3e, /* | 001|11110| */
+ SM5502_MUIC_ADC_AUDIO_TYPE1_SEND_END = 0x5e, /* | 010|11110| */
+ /* |Dev Type1|--ADC| */
+ SM5502_MUIC_ADC_OPEN_USB = 0x5f, /* | 010|11111| */
+ SM5502_MUIC_ADC_OPEN_TA = 0xdf, /* | 110|11111| */
+ SM5502_MUIC_ADC_OPEN_USB_OTG = 0xff, /* | 111|11111| */
+};
+
+/* List of supported interrupt for SM5502 */
+static struct muic_irq sm5502_muic_irqs[] = {
+ { SM5502_IRQ_INT1_ATTACH, "muic-attach" },
+ { SM5502_IRQ_INT1_DETACH, "muic-detach" },
+ { SM5502_IRQ_INT1_KP, "muic-kp" },
+ { SM5502_IRQ_INT1_LKP, "muic-lkp" },
+ { SM5502_IRQ_INT1_LKR, "muic-lkr" },
+ { SM5502_IRQ_INT1_OVP_EVENT, "muic-ovp-event" },
+ { SM5502_IRQ_INT1_OCP_EVENT, "muic-ocp-event" },
+ { SM5502_IRQ_INT1_OVP_OCP_DIS, "muic-ovp-ocp-dis" },
+ { SM5502_IRQ_INT2_VBUS_DET, "muic-vbus-det" },
+ { SM5502_IRQ_INT2_REV_ACCE, "muic-rev-acce" },
+ { SM5502_IRQ_INT2_ADC_CHG, "muic-adc-chg" },
+ { SM5502_IRQ_INT2_STUCK_KEY, "muic-stuck-key" },
+ { SM5502_IRQ_INT2_STUCK_KEY_RCV, "muic-stuck-key-rcv" },
+ { SM5502_IRQ_INT2_MHL, "muic-mhl" },
+};
+
+/* Define interrupt list of SM5502 to register regmap_irq */
+static const struct regmap_irq sm5502_irqs[] = {
+ /* INT1 interrupts */
+ { .reg_offset = 0, .mask = SM5502_IRQ_INT1_ATTACH_MASK, },
+ { .reg_offset = 0, .mask = SM5502_IRQ_INT1_DETACH_MASK, },
+ { .reg_offset = 0, .mask = SM5502_IRQ_INT1_KP_MASK, },
+ { .reg_offset = 0, .mask = SM5502_IRQ_INT1_LKP_MASK, },
+ { .reg_offset = 0, .mask = SM5502_IRQ_INT1_LKR_MASK, },
+ { .reg_offset = 0, .mask = SM5502_IRQ_INT1_OVP_EVENT_MASK, },
+ { .reg_offset = 0, .mask = SM5502_IRQ_INT1_OCP_EVENT_MASK, },
+ { .reg_offset = 0, .mask = SM5502_IRQ_INT1_OVP_OCP_DIS_MASK, },
+
+ /* INT2 interrupts */
+ { .reg_offset = 1, .mask = SM5502_IRQ_INT2_VBUS_DET_MASK,},
+ { .reg_offset = 1, .mask = SM5502_IRQ_INT2_REV_ACCE_MASK, },
+ { .reg_offset = 1, .mask = SM5502_IRQ_INT2_ADC_CHG_MASK, },
+ { .reg_offset = 1, .mask = SM5502_IRQ_INT2_STUCK_KEY_MASK, },
+ { .reg_offset = 1, .mask = SM5502_IRQ_INT2_STUCK_KEY_RCV_MASK, },
+ { .reg_offset = 1, .mask = SM5502_IRQ_INT2_MHL_MASK, },
+};
+
+static const struct regmap_irq_chip sm5502_muic_irq_chip = {
+ .name = "sm5502",
+ .status_base = SM5502_REG_INT1,
+ .mask_base = SM5502_REG_INTMASK1,
+ .mask_invert = false,
+ .num_regs = 2,
+ .irqs = sm5502_irqs,
+ .num_irqs = ARRAY_SIZE(sm5502_irqs),
+};
+
+/* Define regmap configuration of SM5502 for I2C communication */
+static bool sm5502_muic_volatile_reg(struct device *dev, unsigned int reg)
+{
+ switch (reg) {
+ case SM5502_REG_INTMASK1:
+ case SM5502_REG_INTMASK2:
+ return true;
+ default:
+ break;
+ }
+ return false;
+}
+
+static const struct regmap_config sm5502_muic_regmap_config = {
+ .reg_bits = 8,
+ .val_bits = 8,
+ .volatile_reg = sm5502_muic_volatile_reg,
+ .max_register = SM5502_REG_END,
+};
+
+/* Change DM_CON/DP_CON/VBUSIN switch according to cable type */
+static int sm5502_muic_set_path(struct sm5502_muic_info *info,
+ unsigned int con_sw, unsigned int vbus_sw,
+ bool attached)
+{
+ int ret;
+
+ if (!attached) {
+ con_sw = DM_DP_SWITCH_OPEN;
+ vbus_sw = VBUSIN_SWITCH_OPEN;
+ }
+
+ switch (con_sw) {
+ case DM_DP_SWITCH_OPEN:
+ case DM_DP_SWITCH_USB:
+ case DM_DP_SWITCH_AUDIO:
+ case DM_DP_SWITCH_UART:
+ ret = regmap_update_bits(info->regmap, SM5502_REG_MANUAL_SW1,
+ SM5502_REG_MANUAL_SW1_DP_MASK |
+ SM5502_REG_MANUAL_SW1_DM_MASK,
+ con_sw);
+ if (ret < 0) {
+ dev_err(info->dev,
+ "cannot update DM_CON/DP_CON switch\n");
+ return ret;
+ }
+ break;
+ default:
+ dev_err(info->dev, "Unknown DM_CON/DP_CON switch type (%d)\n",
+ con_sw);
+ return -EINVAL;
+ };
+
+ switch (vbus_sw) {
+ case VBUSIN_SWITCH_OPEN:
+ case VBUSIN_SWITCH_VBUSOUT:
+ case VBUSIN_SWITCH_MIC:
+ case VBUSIN_SWITCH_VBUSOUT_WITH_USB:
+ ret = regmap_update_bits(info->regmap, SM5502_REG_MANUAL_SW1,
+ SM5502_REG_MANUAL_SW1_VBUSIN_MASK,
+ vbus_sw);
+ if (ret < 0) {
+ dev_err(info->dev,
+ "cannot update VBUSIN switch\n");
+ return ret;
+ }
+ break;
+ default:
+ dev_err(info->dev, "Unknown VBUS switch type (%d)\n", vbus_sw);
+ return -EINVAL;
+ };
+
+ return 0;
+}
+
+/* Return cable type of attached or detached accessories */
+static unsigned int sm5502_muic_get_cable_type(struct sm5502_muic_info *info)
+{
+ unsigned int cable_type = -1, adc, dev_type1;
+ int ret;
+
+ /* Read ADC value according to external cable or button */
+ ret = regmap_read(info->regmap, SM5502_REG_ADC, &adc);
+ if (ret) {
+ dev_err(info->dev, "failed to read ADC register\n");
+ return ret;
+ }
+
+ /*
+ * If ADC is SM5502_MUIC_ADC_GROUND(0x0), external cable hasn't
+ * connected with to MUIC device.
+ */
+ cable_type &= SM5502_REG_ADC_MASK;
+ if (cable_type == SM5502_MUIC_ADC_GROUND)
+ return SM5502_MUIC_ADC_GROUND;
+
+ switch (cable_type) {
+ case SM5502_MUIC_ADC_GROUND:
+ case SM5502_MUIC_ADC_SEND_END_BUTTON:
+ case SM5502_MUIC_ADC_REMOTE_S1_BUTTON:
+ case SM5502_MUIC_ADC_REMOTE_S2_BUTTON:
+ case SM5502_MUIC_ADC_REMOTE_S3_BUTTON:
+ case SM5502_MUIC_ADC_REMOTE_S4_BUTTON:
+ case SM5502_MUIC_ADC_REMOTE_S5_BUTTON:
+ case SM5502_MUIC_ADC_REMOTE_S6_BUTTON:
+ case SM5502_MUIC_ADC_REMOTE_S7_BUTTON:
+ case SM5502_MUIC_ADC_REMOTE_S8_BUTTON:
+ case SM5502_MUIC_ADC_REMOTE_S9_BUTTON:
+ case SM5502_MUIC_ADC_REMOTE_S10_BUTTON:
+ case SM5502_MUIC_ADC_REMOTE_S11_BUTTON:
+ case SM5502_MUIC_ADC_REMOTE_S12_BUTTON:
+ case SM5502_MUIC_ADC_RESERVED_ACC_1:
+ case SM5502_MUIC_ADC_RESERVED_ACC_2:
+ case SM5502_MUIC_ADC_RESERVED_ACC_3:
+ case SM5502_MUIC_ADC_RESERVED_ACC_4:
+ case SM5502_MUIC_ADC_RESERVED_ACC_5:
+ case SM5502_MUIC_ADC_AUDIO_TYPE2:
+ case SM5502_MUIC_ADC_PHONE_POWERED_DEV:
+ case SM5502_MUIC_ADC_TTY_CONVERTER:
+ case SM5502_MUIC_ADC_UART_CABLE:
+ case SM5502_MUIC_ADC_TYPE1_CHARGER:
+ case SM5502_MUIC_ADC_FACTORY_MODE_BOOT_OFF_USB:
+ case SM5502_MUIC_ADC_FACTORY_MODE_BOOT_ON_USB:
+ case SM5502_MUIC_ADC_AUDIO_VIDEO_CABLE:
+ case SM5502_MUIC_ADC_TYPE2_CHARGER:
+ case SM5502_MUIC_ADC_FACTORY_MODE_BOOT_OFF_UART:
+ case SM5502_MUIC_ADC_FACTORY_MODE_BOOT_ON_UART:
+ break;
+ case SM5502_MUIC_ADC_AUDIO_TYPE1:
+ /*
+ * Check whether cable type is
+ * SM5502_MUIC_ADC_AUDIO_TYPE1_FULL_REMOTE
+ * or SM5502_MUIC_ADC_AUDIO_TYPE1_SEND_END
+ * by using Button event.
+ */
+ break;
+ case SM5502_MUIC_ADC_OPEN:
+ ret = regmap_read(info->regmap, SM5502_REG_DEV_TYPE1,
+ &dev_type1);
+ if (ret) {
+ dev_err(info->dev, "failed to read DEV_TYPE1 reg\n");
+ return ret;
+ }
+
+ switch (dev_type1) {
+ case SM5502_REG_DEV_TYPE1_USB_SDP_MASK:
+ cable_type = SM5502_MUIC_ADC_OPEN_USB;
+ break;
+ case SM5502_REG_DEV_TYPE1_DEDICATED_CHG_MASK:
+ cable_type = SM5502_MUIC_ADC_OPEN_TA;
+ break;
+ case SM5502_REG_DEV_TYPE1_USB_OTG_MASK:
+ cable_type = SM5502_MUIC_ADC_OPEN_USB_OTG;
+ break;
+ default:
+ dev_dbg(info->dev,
+ "cannot identify the cable type: adc(0x%x) "
+ "dev_type1(0x%x)\n", adc, dev_type1);
+ return -EINVAL;
+ };
+ break;
+ default:
+ dev_err(info->dev,
+ "failed to identify the cable type: adc(0x%x)\n", adc);
+ return -EINVAL;
+ };
+
+ return cable_type;
+}
+
+static int sm5502_muic_cable_handler(struct sm5502_muic_info *info,
+ bool attached)
+{
+ static unsigned int prev_cable_type = SM5502_MUIC_ADC_GROUND;
+ const char **cable_names = info->edev->supported_cable;
+ unsigned int cable_type = SM5502_MUIC_ADC_GROUND;
+ unsigned int con_sw = DM_DP_SWITCH_OPEN;
+ unsigned int vbus_sw = VBUSIN_SWITCH_OPEN;
+ unsigned int idx = 0;
+ int ret;
+
+ if (!cable_names)
+ return 0;
+
+ /* Get the type of attached or detached cable */
+ if (attached)
+ cable_type = sm5502_muic_get_cable_type(info);
+ else if (!attached)
+ cable_type = prev_cable_type;
+ prev_cable_type = cable_type;
+
+ switch (cable_type) {
+ case SM5502_MUIC_ADC_OPEN_USB:
+ idx = EXTCON_CABLE_USB;
+ con_sw = DM_DP_SWITCH_USB;
+ vbus_sw = VBUSIN_SWITCH_VBUSOUT_WITH_USB;
+ break;
+ case SM5502_MUIC_ADC_OPEN_TA:
+ idx = EXTCON_CABLE_TA;
+ con_sw = DM_DP_SWITCH_OPEN;
+ vbus_sw = VBUSIN_SWITCH_VBUSOUT;
+ break;
+ case SM5502_MUIC_ADC_OPEN_USB_OTG:
+ idx = EXTCON_CABLE_USB_HOST;
+ con_sw = DM_DP_SWITCH_USB;
+ vbus_sw = VBUSIN_SWITCH_OPEN;
+ break;
+ default:
+ dev_dbg(info->dev,
+ "cannot handle this cable_type (0x%x)\n", cable_type);
+ return 0;
+ };
+
+ /* Change internal hardware path(DM_CON/DP_CON, VBUSIN) */
+ ret = sm5502_muic_set_path(info, con_sw, vbus_sw, attached);
+ if (ret < 0)
+ return ret;
+
+ /* Change the state of external accessory */
+ extcon_set_cable_state(info->edev, cable_names[idx], attached);
+
+ return 0;
+}
+
+static void sm5502_muic_irq_work(struct work_struct *work)
+{
+ struct sm5502_muic_info *info = container_of(work,
+ struct sm5502_muic_info, irq_work);
+ int ret = 0;
+
+ if (!info->edev)
+ return;
+
+ mutex_lock(&info->mutex);
+
+ /* Detect attached or detached cables */
+ if (info->irq_attach) {
+ ret = sm5502_muic_cable_handler(info, true);
+ info->irq_attach = false;
+ }
+ if (info->irq_detach) {
+ ret = sm5502_muic_cable_handler(info, false);
+ info->irq_detach = false;
+ }
+
+ if (ret < 0)
+ dev_err(info->dev, "failed to handle MUIC interrupt\n");
+
+ mutex_unlock(&info->mutex);
+
+ return;
+}
+
+/*
+ * Sets irq_attach or irq_detach in sm5502_muic_info and returns 0.
+ * Returns -ESRCH if irq_type does not match registered IRQ for this dev type.
+ */
+static int sm5502_parse_irq(struct sm5502_muic_info *info, int irq_type)
+{
+ switch (irq_type) {
+ case SM5502_IRQ_INT1_ATTACH:
+ info->irq_attach = true;
+ break;
+ case SM5502_IRQ_INT1_DETACH:
+ info->irq_detach = true;
+ break;
+ case SM5502_IRQ_INT1_KP:
+ case SM5502_IRQ_INT1_LKP:
+ case SM5502_IRQ_INT1_LKR:
+ case SM5502_IRQ_INT1_OVP_EVENT:
+ case SM5502_IRQ_INT1_OCP_EVENT:
+ case SM5502_IRQ_INT1_OVP_OCP_DIS:
+ case SM5502_IRQ_INT2_VBUS_DET:
+ case SM5502_IRQ_INT2_REV_ACCE:
+ case SM5502_IRQ_INT2_ADC_CHG:
+ case SM5502_IRQ_INT2_STUCK_KEY:
+ case SM5502_IRQ_INT2_STUCK_KEY_RCV:
+ case SM5502_IRQ_INT2_MHL:
+ default:
+ break;
+ }
+
+ return 0;
+}
+
+static irqreturn_t sm5502_muic_irq_handler(int irq, void *data)
+{
+ struct sm5502_muic_info *info = data;
+ int i, irq_type = -1, ret;
+
+ for (i = 0; i < info->num_muic_irqs; i++)
+ if (irq == info->muic_irqs[i].virq)
+ irq_type = info->muic_irqs[i].irq;
+
+ ret = sm5502_parse_irq(info, irq_type);
+ if (ret < 0) {
+ dev_warn(info->dev, "cannot handle is interrupt:%d\n",
+ irq_type);
+ return IRQ_HANDLED;
+ }
+ schedule_work(&info->irq_work);
+
+ return IRQ_HANDLED;
+}
+
+static void sm5502_muic_detect_cable_wq(struct work_struct *work)
+{
+ struct sm5502_muic_info *info = container_of(to_delayed_work(work),
+ struct sm5502_muic_info, wq_detcable);
+ int ret;
+
+ /* Notify the state of connector cable or not */
+ ret = sm5502_muic_cable_handler(info, true);
+ if (ret < 0)
+ dev_warn(info->dev, "failed to detect cable state\n");
+}
+
+static void sm5502_init_dev_type(struct sm5502_muic_info *info)
+{
+ unsigned int reg_data, vendor_id, version_id;
+ int i, ret;
+
+ /* To test I2C, Print version_id and vendor_id of SM5502 */
+ ret = regmap_read(info->regmap, SM5502_REG_DEVICE_ID, &reg_data);
+ if (ret) {
+ dev_err(info->dev,
+ "failed to read DEVICE_ID register: %d\n", ret);
+ return;
+ }
+
+ vendor_id = ((reg_data & SM5502_REG_DEVICE_ID_VENDOR_MASK) >>
+ SM5502_REG_DEVICE_ID_VENDOR_SHIFT);
+ version_id = ((reg_data & SM5502_REG_DEVICE_ID_VERSION_MASK) >>
+ SM5502_REG_DEVICE_ID_VERSION_SHIFT);
+
+ dev_info(info->dev, "Device type: version: 0x%x, vendor: 0x%x\n",
+ version_id, vendor_id);
+
+ /* Initiazle the register of SM5502 device to bring-up */
+ for (i = 0; i < info->num_reg_data; i++) {
+ unsigned int val = 0;
+
+ if (!info->reg_data[i].invert)
+ val |= ~info->reg_data[i].val;
+ else
+ val = info->reg_data[i].val;
+ regmap_write(info->regmap, info->reg_data[i].reg, val);
+ }
+}
+
+static int sm5022_muic_i2c_probe(struct i2c_client *i2c,
+ const struct i2c_device_id *id)
+{
+ struct device_node *np = i2c->dev.of_node;
+ struct sm5502_muic_info *info;
+ int i, ret, irq_flags;
+
+ if (!np)
+ return -EINVAL;
+
+ info = devm_kzalloc(&i2c->dev, sizeof(*info), GFP_KERNEL);
+ if (!info)
+ return -ENOMEM;
+ i2c_set_clientdata(i2c, info);
+
+ info->dev = &i2c->dev;
+ info->i2c = i2c;
+ info->irq = i2c->irq;
+ info->muic_irqs = sm5502_muic_irqs;
+ info->num_muic_irqs = ARRAY_SIZE(sm5502_muic_irqs);
+ info->reg_data = sm5502_reg_data;
+ info->num_reg_data = ARRAY_SIZE(sm5502_reg_data);
+
+ mutex_init(&info->mutex);
+
+ INIT_WORK(&info->irq_work, sm5502_muic_irq_work);
+
+ info->regmap = devm_regmap_init_i2c(i2c, &sm5502_muic_regmap_config);
+ if (IS_ERR(info->regmap)) {
+ ret = PTR_ERR(info->regmap);
+ dev_err(info->dev, "failed to allocate register map: %d\n",
+ ret);
+ return ret;
+ }
+
+ /* Support irq domain for SM5502 MUIC device */
+ irq_flags = IRQF_TRIGGER_FALLING | IRQF_ONESHOT | IRQF_SHARED;
+ ret = regmap_add_irq_chip(info->regmap, info->irq, irq_flags, 0,
+ &sm5502_muic_irq_chip, &info->irq_data);
+ if (ret != 0) {
+ dev_err(info->dev, "failed to request IRQ %d: %d\n",
+ info->irq, ret);
+ return ret;
+ }
+
+ for (i = 0; i < info->num_muic_irqs; i++) {
+ struct muic_irq *muic_irq = &info->muic_irqs[i];
+ unsigned int virq = 0;
+
+ virq = regmap_irq_get_virq(info->irq_data, muic_irq->irq);
+ if (virq <= 0)
+ return -EINVAL;
+ muic_irq->virq = virq;
+
+ ret = devm_request_threaded_irq(info->dev, virq, NULL,
+ sm5502_muic_irq_handler,
+ IRQF_NO_SUSPEND,
+ muic_irq->name, info);
+ if (ret) {
+ dev_err(info->dev, "failed: irq request (IRQ: %d,"
+ " error :%d)\n", muic_irq->irq, ret);
+ return ret;
+ }
+ }
+
+ /* Allocate extcon device */
+ info->edev = devm_extcon_dev_allocate(info->dev, sm5502_extcon_cable);
+ if (IS_ERR(info->edev)) {
+ dev_err(info->dev, "failed to allocate memory for extcon\n");
+ return -ENOMEM;
+ }
+ info->edev->name = np->name;
+
+ /* Register extcon device */
+ ret = devm_extcon_dev_register(info->dev, info->edev);
+ if (ret) {
+ dev_err(info->dev, "failed to register extcon device\n");
+ return ret;
+ }
+
+ /*
+ * Detect accessory after completing the initialization of platform
+ *
+ * - Use delayed workqueue to detect cable state and then
+ * notify cable state to notifiee/platform through uevent.
+ * After completing the booting of platform, the extcon provider
+ * driver should notify cable state to upper layer.
+ */
+ INIT_DELAYED_WORK(&info->wq_detcable, sm5502_muic_detect_cable_wq);
+ queue_delayed_work(system_power_efficient_wq, &info->wq_detcable,
+ msecs_to_jiffies(DELAY_MS_DEFAULT));
+
+ /* Initialize SM5502 device and print vendor id and version id */
+ sm5502_init_dev_type(info);
+
+ return 0;
+}
+
+static int sm5502_muic_i2c_remove(struct i2c_client *i2c)
+{
+ struct sm5502_muic_info *info = i2c_get_clientdata(i2c);
+
+ regmap_del_irq_chip(info->irq, info->irq_data);
+
+ return 0;
+}
+
+static struct of_device_id sm5502_dt_match[] = {
+ { .compatible = "siliconmitus,sm5502-muic" },
+ { },
+};
+
+#ifdef CONFIG_PM_SLEEP
+static int sm5502_muic_suspend(struct device *dev)
+{
+ struct i2c_client *i2c = container_of(dev, struct i2c_client, dev);
+ struct sm5502_muic_info *info = i2c_get_clientdata(i2c);
+
+ enable_irq_wake(info->irq);
+
+ return 0;
+}
+
+static int sm5502_muic_resume(struct device *dev)
+{
+ struct i2c_client *i2c = container_of(dev, struct i2c_client, dev);
+ struct sm5502_muic_info *info = i2c_get_clientdata(i2c);
+
+ disable_irq_wake(info->irq);
+
+ return 0;
+}
+#endif
+
+static SIMPLE_DEV_PM_OPS(sm5502_muic_pm_ops,
+ sm5502_muic_suspend, sm5502_muic_resume);
+
+static const struct i2c_device_id sm5502_i2c_id[] = {
+ { "sm5502", TYPE_SM5502 },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, sm5502_i2c_id);
+
+static struct i2c_driver sm5502_muic_i2c_driver = {
+ .driver = {
+ .name = "sm5502",
+ .owner = THIS_MODULE,
+ .pm = &sm5502_muic_pm_ops,
+ .of_match_table = sm5502_dt_match,
+ },
+ .probe = sm5022_muic_i2c_probe,
+ .remove = sm5502_muic_i2c_remove,
+ .id_table = sm5502_i2c_id,
+};
+
+static int __init sm5502_muic_i2c_init(void)
+{
+ return i2c_add_driver(&sm5502_muic_i2c_driver);
+}
+subsys_initcall(sm5502_muic_i2c_init);
+
+MODULE_DESCRIPTION("Silicon Mitus SM5502 Extcon driver");
+MODULE_AUTHOR("Chanwoo Choi <cw00.choi@samsung.com>");
+MODULE_LICENSE("GPL");
diff --git a/drivers/hv/channel.c b/drivers/hv/channel.c
index 284cf66489f4..531a593912ec 100644
--- a/drivers/hv/channel.c
+++ b/drivers/hv/channel.c
@@ -808,12 +808,8 @@ int vmbus_recvpacket_raw(struct vmbus_channel *channel, void *buffer,
*buffer_actual_len = packetlen;
- if (packetlen > bufferlen) {
- pr_err("Buffer too small - needed %d bytes but "
- "got space for only %d bytes\n",
- packetlen, bufferlen);
+ if (packetlen > bufferlen)
return -ENOBUFS;
- }
*requestid = desc.trans_id;
diff --git a/drivers/ipack/carriers/tpci200.c b/drivers/ipack/carriers/tpci200.c
index c276fde318e5..de5e32151a1e 100644
--- a/drivers/ipack/carriers/tpci200.c
+++ b/drivers/ipack/carriers/tpci200.c
@@ -618,7 +618,7 @@ static void tpci200_pci_remove(struct pci_dev *dev)
__tpci200_pci_remove(tpci200);
}
-static DEFINE_PCI_DEVICE_TABLE(tpci200_idtable) = {
+static const struct pci_device_id tpci200_idtable[] = {
{ TPCI200_VENDOR_ID, TPCI200_DEVICE_ID, TPCI200_SUBVENDOR_ID,
TPCI200_SUBDEVICE_ID },
{ 0, },
diff --git a/drivers/ipack/devices/ipoctal.c b/drivers/ipack/devices/ipoctal.c
index 141094e7c06e..e41bef048c23 100644
--- a/drivers/ipack/devices/ipoctal.c
+++ b/drivers/ipack/devices/ipoctal.c
@@ -177,19 +177,20 @@ static void ipoctal_irq_tx(struct ipoctal_channel *channel)
if (channel->nb_bytes == 0)
return;
+ spin_lock(&channel->lock);
value = channel->tty_port.xmit_buf[*pointer_write];
iowrite8(value, &channel->regs->w.thr);
channel->stats.tx++;
(*pointer_write)++;
*pointer_write = *pointer_write % PAGE_SIZE;
channel->nb_bytes--;
+ spin_unlock(&channel->lock);
}
static void ipoctal_irq_channel(struct ipoctal_channel *channel)
{
u8 isr, sr;
- spin_lock(&channel->lock);
/* The HW is organized in pair of channels. See which register we need
* to read from */
isr = ioread8(&channel->block_regs->r.isr);
@@ -213,8 +214,6 @@ static void ipoctal_irq_channel(struct ipoctal_channel *channel)
/* TX of each character */
if ((isr & channel->isr_tx_rdy_mask) && (sr & SR_TX_READY))
ipoctal_irq_tx(channel);
-
- spin_unlock(&channel->lock);
}
static irqreturn_t ipoctal_irq_handler(void *arg)
@@ -324,13 +323,6 @@ static int ipoctal_inst_slot(struct ipoctal *ipoctal, unsigned int bus_nr,
&block_regs[i].w.imr);
}
- /*
- * IP-OCTAL has different addresses to copy its IRQ vector.
- * Depending of the carrier these addresses are accesible or not.
- * More info in the datasheet.
- */
- ipoctal->dev->bus->ops->request_irq(ipoctal->dev,
- ipoctal_irq_handler, ipoctal);
/* Dummy write */
iowrite8(1, ipoctal->mem8_space + 1);
@@ -391,6 +383,14 @@ static int ipoctal_inst_slot(struct ipoctal *ipoctal, unsigned int bus_nr,
dev_set_drvdata(tty_dev, channel);
}
+ /*
+ * IP-OCTAL has different addresses to copy its IRQ vector.
+ * Depending of the carrier these addresses are accesible or not.
+ * More info in the datasheet.
+ */
+ ipoctal->dev->bus->ops->request_irq(ipoctal->dev,
+ ipoctal_irq_handler, ipoctal);
+
return 0;
}
diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
index 6cc4b6acc22a..fb824f501197 100644
--- a/drivers/mfd/Kconfig
+++ b/drivers/mfd/Kconfig
@@ -384,6 +384,7 @@ config MFD_MAX77693
depends on I2C=y
select MFD_CORE
select REGMAP_I2C
+ select REGMAP_IRQ
help
Say yes here to add support for Maxim Semiconductor MAX77693.
This is a companion Power Management IC with Flash, Haptic, Charger,
diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile
index 8afedba535c7..8c6e7bba4660 100644
--- a/drivers/mfd/Makefile
+++ b/drivers/mfd/Makefile
@@ -116,7 +116,7 @@ obj-$(CONFIG_MFD_DA9063) += da9063.o
obj-$(CONFIG_MFD_MAX14577) += max14577.o
obj-$(CONFIG_MFD_MAX77686) += max77686.o max77686-irq.o
-obj-$(CONFIG_MFD_MAX77693) += max77693.o max77693-irq.o
+obj-$(CONFIG_MFD_MAX77693) += max77693.o
obj-$(CONFIG_MFD_MAX8907) += max8907.o
max8925-objs := max8925-core.o max8925-i2c.o
obj-$(CONFIG_MFD_MAX8925) += max8925.o
diff --git a/drivers/mfd/max77693-irq.c b/drivers/mfd/max77693-irq.c
deleted file mode 100644
index 66b58fe77094..000000000000
--- a/drivers/mfd/max77693-irq.c
+++ /dev/null
@@ -1,336 +0,0 @@
-/*
- * max77693-irq.c - Interrupt controller support for MAX77693
- *
- * Copyright (C) 2012 Samsung Electronics Co.Ltd
- * SangYoung Son <hello.son@samsung.com>
- *
- * This program is not provided / owned by Maxim Integrated Products.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- *
- * This driver is based on max8997-irq.c
- */
-
-#include <linux/err.h>
-#include <linux/irq.h>
-#include <linux/interrupt.h>
-#include <linux/module.h>
-#include <linux/irqdomain.h>
-#include <linux/mfd/max77693.h>
-#include <linux/mfd/max77693-private.h>
-
-static const u8 max77693_mask_reg[] = {
- [LED_INT] = MAX77693_LED_REG_FLASH_INT_MASK,
- [TOPSYS_INT] = MAX77693_PMIC_REG_TOPSYS_INT_MASK,
- [CHG_INT] = MAX77693_CHG_REG_CHG_INT_MASK,
- [MUIC_INT1] = MAX77693_MUIC_REG_INTMASK1,
- [MUIC_INT2] = MAX77693_MUIC_REG_INTMASK2,
- [MUIC_INT3] = MAX77693_MUIC_REG_INTMASK3,
-};
-
-static struct regmap *max77693_get_regmap(struct max77693_dev *max77693,
- enum max77693_irq_source src)
-{
- switch (src) {
- case LED_INT ... CHG_INT:
- return max77693->regmap;
- case MUIC_INT1 ... MUIC_INT3:
- return max77693->regmap_muic;
- default:
- return ERR_PTR(-EINVAL);
- }
-}
-
-struct max77693_irq_data {
- int mask;
- enum max77693_irq_source group;
-};
-
-#define DECLARE_IRQ(idx, _group, _mask) \
- [(idx)] = { .group = (_group), .mask = (_mask) }
-static const struct max77693_irq_data max77693_irqs[] = {
- DECLARE_IRQ(MAX77693_LED_IRQ_FLED2_OPEN, LED_INT, 1 << 0),
- DECLARE_IRQ(MAX77693_LED_IRQ_FLED2_SHORT, LED_INT, 1 << 1),
- DECLARE_IRQ(MAX77693_LED_IRQ_FLED1_OPEN, LED_INT, 1 << 2),
- DECLARE_IRQ(MAX77693_LED_IRQ_FLED1_SHORT, LED_INT, 1 << 3),
- DECLARE_IRQ(MAX77693_LED_IRQ_MAX_FLASH, LED_INT, 1 << 4),
-
- DECLARE_IRQ(MAX77693_TOPSYS_IRQ_T120C_INT, TOPSYS_INT, 1 << 0),
- DECLARE_IRQ(MAX77693_TOPSYS_IRQ_T140C_INT, TOPSYS_INT, 1 << 1),
- DECLARE_IRQ(MAX77693_TOPSYS_IRQ_LOWSYS_INT, TOPSYS_INT, 1 << 3),
-
- DECLARE_IRQ(MAX77693_CHG_IRQ_BYP_I, CHG_INT, 1 << 0),
- DECLARE_IRQ(MAX77693_CHG_IRQ_THM_I, CHG_INT, 1 << 2),
- DECLARE_IRQ(MAX77693_CHG_IRQ_BAT_I, CHG_INT, 1 << 3),
- DECLARE_IRQ(MAX77693_CHG_IRQ_CHG_I, CHG_INT, 1 << 4),
- DECLARE_IRQ(MAX77693_CHG_IRQ_CHGIN_I, CHG_INT, 1 << 6),
-
- DECLARE_IRQ(MAX77693_MUIC_IRQ_INT1_ADC, MUIC_INT1, 1 << 0),
- DECLARE_IRQ(MAX77693_MUIC_IRQ_INT1_ADC_LOW, MUIC_INT1, 1 << 1),
- DECLARE_IRQ(MAX77693_MUIC_IRQ_INT1_ADC_ERR, MUIC_INT1, 1 << 2),
- DECLARE_IRQ(MAX77693_MUIC_IRQ_INT1_ADC1K, MUIC_INT1, 1 << 3),
-
- DECLARE_IRQ(MAX77693_MUIC_IRQ_INT2_CHGTYP, MUIC_INT2, 1 << 0),
- DECLARE_IRQ(MAX77693_MUIC_IRQ_INT2_CHGDETREUN, MUIC_INT2, 1 << 1),
- DECLARE_IRQ(MAX77693_MUIC_IRQ_INT2_DCDTMR, MUIC_INT2, 1 << 2),
- DECLARE_IRQ(MAX77693_MUIC_IRQ_INT2_DXOVP, MUIC_INT2, 1 << 3),
- DECLARE_IRQ(MAX77693_MUIC_IRQ_INT2_VBVOLT, MUIC_INT2, 1 << 4),
- DECLARE_IRQ(MAX77693_MUIC_IRQ_INT2_VIDRM, MUIC_INT2, 1 << 5),
-
- DECLARE_IRQ(MAX77693_MUIC_IRQ_INT3_EOC, MUIC_INT3, 1 << 0),
- DECLARE_IRQ(MAX77693_MUIC_IRQ_INT3_CGMBC, MUIC_INT3, 1 << 1),
- DECLARE_IRQ(MAX77693_MUIC_IRQ_INT3_OVP, MUIC_INT3, 1 << 2),
- DECLARE_IRQ(MAX77693_MUIC_IRQ_INT3_MBCCHG_ERR, MUIC_INT3, 1 << 3),
- DECLARE_IRQ(MAX77693_MUIC_IRQ_INT3_CHG_ENABLED, MUIC_INT3, 1 << 4),
- DECLARE_IRQ(MAX77693_MUIC_IRQ_INT3_BAT_DET, MUIC_INT3, 1 << 5),
-};
-
-static void max77693_irq_lock(struct irq_data *data)
-{
- struct max77693_dev *max77693 = irq_get_chip_data(data->irq);
-
- mutex_lock(&max77693->irqlock);
-}
-
-static void max77693_irq_sync_unlock(struct irq_data *data)
-{
- struct max77693_dev *max77693 = irq_get_chip_data(data->irq);
- int i;
-
- for (i = 0; i < MAX77693_IRQ_GROUP_NR; i++) {
- u8 mask_reg = max77693_mask_reg[i];
- struct regmap *map = max77693_get_regmap(max77693, i);
-
- if (mask_reg == MAX77693_REG_INVALID ||
- IS_ERR_OR_NULL(map))
- continue;
- max77693->irq_masks_cache[i] = max77693->irq_masks_cur[i];
-
- max77693_write_reg(map, max77693_mask_reg[i],
- max77693->irq_masks_cur[i]);
- }
-
- mutex_unlock(&max77693->irqlock);
-}
-
-static const inline struct max77693_irq_data *
-irq_to_max77693_irq(struct max77693_dev *max77693, int irq)
-{
- struct irq_data *data = irq_get_irq_data(irq);
- return &max77693_irqs[data->hwirq];
-}
-
-static void max77693_irq_mask(struct irq_data *data)
-{
- struct max77693_dev *max77693 = irq_get_chip_data(data->irq);
- const struct max77693_irq_data *irq_data =
- irq_to_max77693_irq(max77693, data->irq);
-
- if (irq_data->group >= MAX77693_IRQ_GROUP_NR)
- return;
-
- if (irq_data->group >= MUIC_INT1 && irq_data->group <= MUIC_INT3)
- max77693->irq_masks_cur[irq_data->group] &= ~irq_data->mask;
- else
- max77693->irq_masks_cur[irq_data->group] |= irq_data->mask;
-}
-
-static void max77693_irq_unmask(struct irq_data *data)
-{
- struct max77693_dev *max77693 = irq_get_chip_data(data->irq);
- const struct max77693_irq_data *irq_data =
- irq_to_max77693_irq(max77693, data->irq);
-
- if (irq_data->group >= MAX77693_IRQ_GROUP_NR)
- return;
-
- if (irq_data->group >= MUIC_INT1 && irq_data->group <= MUIC_INT3)
- max77693->irq_masks_cur[irq_data->group] |= irq_data->mask;
- else
- max77693->irq_masks_cur[irq_data->group] &= ~irq_data->mask;
-}
-
-static struct irq_chip max77693_irq_chip = {
- .name = "max77693",
- .irq_bus_lock = max77693_irq_lock,
- .irq_bus_sync_unlock = max77693_irq_sync_unlock,
- .irq_mask = max77693_irq_mask,
- .irq_unmask = max77693_irq_unmask,
-};
-
-#define MAX77693_IRQSRC_CHG (1 << 0)
-#define MAX77693_IRQSRC_TOP (1 << 1)
-#define MAX77693_IRQSRC_FLASH (1 << 2)
-#define MAX77693_IRQSRC_MUIC (1 << 3)
-static irqreturn_t max77693_irq_thread(int irq, void *data)
-{
- struct max77693_dev *max77693 = data;
- u8 irq_reg[MAX77693_IRQ_GROUP_NR] = {};
- u8 irq_src;
- int ret;
- int i, cur_irq;
-
- ret = max77693_read_reg(max77693->regmap, MAX77693_PMIC_REG_INTSRC,
- &irq_src);
- if (ret < 0) {
- dev_err(max77693->dev, "Failed to read interrupt source: %d\n",
- ret);
- return IRQ_NONE;
- }
-
- if (irq_src & MAX77693_IRQSRC_CHG)
- /* CHG_INT */
- ret = max77693_read_reg(max77693->regmap, MAX77693_CHG_REG_CHG_INT,
- &irq_reg[CHG_INT]);
-
- if (irq_src & MAX77693_IRQSRC_TOP)
- /* TOPSYS_INT */
- ret = max77693_read_reg(max77693->regmap,
- MAX77693_PMIC_REG_TOPSYS_INT, &irq_reg[TOPSYS_INT]);
-
- if (irq_src & MAX77693_IRQSRC_FLASH)
- /* LED_INT */
- ret = max77693_read_reg(max77693->regmap,
- MAX77693_LED_REG_FLASH_INT, &irq_reg[LED_INT]);
-
- if (irq_src & MAX77693_IRQSRC_MUIC)
- /* MUIC INT1 ~ INT3 */
- max77693_bulk_read(max77693->regmap_muic, MAX77693_MUIC_REG_INT1,
- MAX77693_NUM_IRQ_MUIC_REGS, &irq_reg[MUIC_INT1]);
-
- /* Apply masking */
- for (i = 0; i < MAX77693_IRQ_GROUP_NR; i++) {
- if (i >= MUIC_INT1 && i <= MUIC_INT3)
- irq_reg[i] &= max77693->irq_masks_cur[i];
- else
- irq_reg[i] &= ~max77693->irq_masks_cur[i];
- }
-
- /* Report */
- for (i = 0; i < MAX77693_IRQ_NR; i++) {
- if (irq_reg[max77693_irqs[i].group] & max77693_irqs[i].mask) {
- cur_irq = irq_find_mapping(max77693->irq_domain, i);
- if (cur_irq)
- handle_nested_irq(cur_irq);
- }
- }
-
- return IRQ_HANDLED;
-}
-
-int max77693_irq_resume(struct max77693_dev *max77693)
-{
- if (max77693->irq)
- max77693_irq_thread(0, max77693);
-
- return 0;
-}
-
-static int max77693_irq_domain_map(struct irq_domain *d, unsigned int irq,
- irq_hw_number_t hw)
-{
- struct max77693_dev *max77693 = d->host_data;
-
- irq_set_chip_data(irq, max77693);
- irq_set_chip_and_handler(irq, &max77693_irq_chip, handle_edge_irq);
- irq_set_nested_thread(irq, 1);
-#ifdef CONFIG_ARM
- set_irq_flags(irq, IRQF_VALID);
-#else
- irq_set_noprobe(irq);
-#endif
- return 0;
-}
-
-static struct irq_domain_ops max77693_irq_domain_ops = {
- .map = max77693_irq_domain_map,
-};
-
-int max77693_irq_init(struct max77693_dev *max77693)
-{
- struct irq_domain *domain;
- int i;
- int ret = 0;
- u8 intsrc_mask;
-
- mutex_init(&max77693->irqlock);
-
- /* Mask individual interrupt sources */
- for (i = 0; i < MAX77693_IRQ_GROUP_NR; i++) {
- struct regmap *map;
- /* MUIC IRQ 0:MASK 1:NOT MASK */
- /* Other IRQ 1:MASK 0:NOT MASK */
- if (i >= MUIC_INT1 && i <= MUIC_INT3) {
- max77693->irq_masks_cur[i] = 0x00;
- max77693->irq_masks_cache[i] = 0x00;
- } else {
- max77693->irq_masks_cur[i] = 0xff;
- max77693->irq_masks_cache[i] = 0xff;
- }
- map = max77693_get_regmap(max77693, i);
-
- if (IS_ERR_OR_NULL(map))
- continue;
- if (max77693_mask_reg[i] == MAX77693_REG_INVALID)
- continue;
- if (i >= MUIC_INT1 && i <= MUIC_INT3)
- max77693_write_reg(map, max77693_mask_reg[i], 0x00);
- else
- max77693_write_reg(map, max77693_mask_reg[i], 0xff);
- }
-
- domain = irq_domain_add_linear(NULL, MAX77693_IRQ_NR,
- &max77693_irq_domain_ops, max77693);
- if (!domain) {
- dev_err(max77693->dev, "could not create irq domain\n");
- ret = -ENODEV;
- goto err_irq;
- }
- max77693->irq_domain = domain;
-
- /* Unmask max77693 interrupt */
- ret = max77693_read_reg(max77693->regmap,
- MAX77693_PMIC_REG_INTSRC_MASK, &intsrc_mask);
- if (ret < 0) {
- dev_err(max77693->dev, "fail to read PMIC register\n");
- goto err_irq;
- }
-
- intsrc_mask &= ~(MAX77693_IRQSRC_CHG);
- intsrc_mask &= ~(MAX77693_IRQSRC_FLASH);
- intsrc_mask &= ~(MAX77693_IRQSRC_MUIC);
- ret = max77693_write_reg(max77693->regmap,
- MAX77693_PMIC_REG_INTSRC_MASK, intsrc_mask);
- if (ret < 0) {
- dev_err(max77693->dev, "fail to write PMIC register\n");
- goto err_irq;
- }
-
- ret = request_threaded_irq(max77693->irq, NULL, max77693_irq_thread,
- IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
- "max77693-irq", max77693);
- if (ret)
- dev_err(max77693->dev, "Failed to request IRQ %d: %d\n",
- max77693->irq, ret);
-
-err_irq:
- return ret;
-}
-
-void max77693_irq_exit(struct max77693_dev *max77693)
-{
- if (max77693->irq)
- free_irq(max77693->irq, max77693);
-}
diff --git a/drivers/mfd/max77693.c b/drivers/mfd/max77693.c
index 7e05428c756d..249c139ef04a 100644
--- a/drivers/mfd/max77693.c
+++ b/drivers/mfd/max77693.c
@@ -49,62 +49,62 @@ static const struct mfd_cell max77693_devs[] = {
{ .name = "max77693-haptic", },
};
-int max77693_read_reg(struct regmap *map, u8 reg, u8 *dest)
-{
- unsigned int val;
- int ret;
-
- ret = regmap_read(map, reg, &val);
- *dest = val;
-
- return ret;
-}
-EXPORT_SYMBOL_GPL(max77693_read_reg);
-
-int max77693_bulk_read(struct regmap *map, u8 reg, int count, u8 *buf)
-{
- int ret;
-
- ret = regmap_bulk_read(map, reg, buf, count);
-
- return ret;
-}
-EXPORT_SYMBOL_GPL(max77693_bulk_read);
-
-int max77693_write_reg(struct regmap *map, u8 reg, u8 value)
-{
- int ret;
-
- ret = regmap_write(map, reg, value);
-
- return ret;
-}
-EXPORT_SYMBOL_GPL(max77693_write_reg);
-
-int max77693_bulk_write(struct regmap *map, u8 reg, int count, u8 *buf)
-{
- int ret;
+static const struct regmap_config max77693_regmap_config = {
+ .reg_bits = 8,
+ .val_bits = 8,
+ .max_register = MAX77693_PMIC_REG_END,
+};
- ret = regmap_bulk_write(map, reg, buf, count);
+static const struct regmap_irq max77693_led_irqs[] = {
+ { .mask = LED_IRQ_FLED2_OPEN, },
+ { .mask = LED_IRQ_FLED2_SHORT, },
+ { .mask = LED_IRQ_FLED1_OPEN, },
+ { .mask = LED_IRQ_FLED1_SHORT, },
+ { .mask = LED_IRQ_MAX_FLASH, },
+};
- return ret;
-}
-EXPORT_SYMBOL_GPL(max77693_bulk_write);
+static const struct regmap_irq_chip max77693_led_irq_chip = {
+ .name = "max77693-led",
+ .status_base = MAX77693_LED_REG_FLASH_INT,
+ .mask_base = MAX77693_LED_REG_FLASH_INT_MASK,
+ .mask_invert = false,
+ .num_regs = 1,
+ .irqs = max77693_led_irqs,
+ .num_irqs = ARRAY_SIZE(max77693_led_irqs),
+};
-int max77693_update_reg(struct regmap *map, u8 reg, u8 val, u8 mask)
-{
- int ret;
+static const struct regmap_irq max77693_topsys_irqs[] = {
+ { .mask = TOPSYS_IRQ_T120C_INT, },
+ { .mask = TOPSYS_IRQ_T140C_INT, },
+ { .mask = TOPSYS_IRQ_LOWSYS_INT, },
+};
- ret = regmap_update_bits(map, reg, mask, val);
+static const struct regmap_irq_chip max77693_topsys_irq_chip = {
+ .name = "max77693-topsys",
+ .status_base = MAX77693_PMIC_REG_TOPSYS_INT,
+ .mask_base = MAX77693_PMIC_REG_TOPSYS_INT_MASK,
+ .mask_invert = false,
+ .num_regs = 1,
+ .irqs = max77693_topsys_irqs,
+ .num_irqs = ARRAY_SIZE(max77693_topsys_irqs),
+};
- return ret;
-}
-EXPORT_SYMBOL_GPL(max77693_update_reg);
+static const struct regmap_irq max77693_charger_irqs[] = {
+ { .mask = CHG_IRQ_BYP_I, },
+ { .mask = CHG_IRQ_THM_I, },
+ { .mask = CHG_IRQ_BAT_I, },
+ { .mask = CHG_IRQ_CHG_I, },
+ { .mask = CHG_IRQ_CHGIN_I, },
+};
-static const struct regmap_config max77693_regmap_config = {
- .reg_bits = 8,
- .val_bits = 8,
- .max_register = MAX77693_PMIC_REG_END,
+static const struct regmap_irq_chip max77693_charger_irq_chip = {
+ .name = "max77693-charger",
+ .status_base = MAX77693_CHG_REG_CHG_INT,
+ .mask_base = MAX77693_CHG_REG_CHG_INT_MASK,
+ .mask_invert = false,
+ .num_regs = 1,
+ .irqs = max77693_charger_irqs,
+ .num_irqs = ARRAY_SIZE(max77693_charger_irqs),
};
static const struct regmap_config max77693_regmap_muic_config = {
@@ -113,11 +113,42 @@ static const struct regmap_config max77693_regmap_muic_config = {
.max_register = MAX77693_MUIC_REG_END,
};
+static const struct regmap_irq max77693_muic_irqs[] = {
+ { .reg_offset = 0, .mask = MUIC_IRQ_INT1_ADC, },
+ { .reg_offset = 0, .mask = MUIC_IRQ_INT1_ADC_LOW, },
+ { .reg_offset = 0, .mask = MUIC_IRQ_INT1_ADC_ERR, },
+ { .reg_offset = 0, .mask = MUIC_IRQ_INT1_ADC1K, },
+
+ { .reg_offset = 1, .mask = MUIC_IRQ_INT2_CHGTYP, },
+ { .reg_offset = 1, .mask = MUIC_IRQ_INT2_CHGDETREUN, },
+ { .reg_offset = 1, .mask = MUIC_IRQ_INT2_DCDTMR, },
+ { .reg_offset = 1, .mask = MUIC_IRQ_INT2_DXOVP, },
+ { .reg_offset = 1, .mask = MUIC_IRQ_INT2_VBVOLT, },
+ { .reg_offset = 1, .mask = MUIC_IRQ_INT2_VIDRM, },
+
+ { .reg_offset = 2, .mask = MUIC_IRQ_INT3_EOC, },
+ { .reg_offset = 2, .mask = MUIC_IRQ_INT3_CGMBC, },
+ { .reg_offset = 2, .mask = MUIC_IRQ_INT3_OVP, },
+ { .reg_offset = 2, .mask = MUIC_IRQ_INT3_MBCCHG_ERR, },
+ { .reg_offset = 2, .mask = MUIC_IRQ_INT3_CHG_ENABLED, },
+ { .reg_offset = 2, .mask = MUIC_IRQ_INT3_BAT_DET, },
+};
+
+static const struct regmap_irq_chip max77693_muic_irq_chip = {
+ .name = "max77693-muic",
+ .status_base = MAX77693_MUIC_REG_INT1,
+ .mask_base = MAX77693_MUIC_REG_INTMASK1,
+ .mask_invert = true,
+ .num_regs = 3,
+ .irqs = max77693_muic_irqs,
+ .num_irqs = ARRAY_SIZE(max77693_muic_irqs),
+};
+
static int max77693_i2c_probe(struct i2c_client *i2c,
const struct i2c_device_id *id)
{
struct max77693_dev *max77693;
- u8 reg_data;
+ unsigned int reg_data;
int ret = 0;
max77693 = devm_kzalloc(&i2c->dev,
@@ -139,7 +170,7 @@ static int max77693_i2c_probe(struct i2c_client *i2c,
return ret;
}
- ret = max77693_read_reg(max77693->regmap, MAX77693_PMIC_REG_PMIC_ID2,
+ ret = regmap_read(max77693->regmap, MAX77693_PMIC_REG_PMIC_ID2,
&reg_data);
if (ret < 0) {
dev_err(max77693->dev, "device not found on this channel\n");
@@ -176,9 +207,45 @@ static int max77693_i2c_probe(struct i2c_client *i2c,
goto err_regmap_muic;
}
- ret = max77693_irq_init(max77693);
- if (ret < 0)
- goto err_irq;
+ ret = regmap_add_irq_chip(max77693->regmap, max77693->irq,
+ IRQF_ONESHOT | IRQF_SHARED |
+ IRQF_TRIGGER_FALLING, 0,
+ &max77693_led_irq_chip,
+ &max77693->irq_data_led);
+ if (ret) {
+ dev_err(max77693->dev, "failed to add irq chip: %d\n", ret);
+ goto err_regmap_muic;
+ }
+
+ ret = regmap_add_irq_chip(max77693->regmap, max77693->irq,
+ IRQF_ONESHOT | IRQF_SHARED |
+ IRQF_TRIGGER_FALLING, 0,
+ &max77693_topsys_irq_chip,
+ &max77693->irq_data_topsys);
+ if (ret) {
+ dev_err(max77693->dev, "failed to add irq chip: %d\n", ret);
+ goto err_irq_topsys;
+ }
+
+ ret = regmap_add_irq_chip(max77693->regmap, max77693->irq,
+ IRQF_ONESHOT | IRQF_SHARED |
+ IRQF_TRIGGER_FALLING, 0,
+ &max77693_charger_irq_chip,
+ &max77693->irq_data_charger);
+ if (ret) {
+ dev_err(max77693->dev, "failed to add irq chip: %d\n", ret);
+ goto err_irq_charger;
+ }
+
+ ret = regmap_add_irq_chip(max77693->regmap, max77693->irq,
+ IRQF_ONESHOT | IRQF_SHARED |
+ IRQF_TRIGGER_FALLING, 0,
+ &max77693_muic_irq_chip,
+ &max77693->irq_data_muic);
+ if (ret) {
+ dev_err(max77693->dev, "failed to add irq chip: %d\n", ret);
+ goto err_irq_muic;
+ }
pm_runtime_set_active(max77693->dev);
@@ -190,8 +257,14 @@ static int max77693_i2c_probe(struct i2c_client *i2c,
return ret;
err_mfd:
- max77693_irq_exit(max77693);
-err_irq:
+ mfd_remove_devices(max77693->dev);
+ regmap_del_irq_chip(max77693->irq, max77693->irq_data_muic);
+err_irq_muic:
+ regmap_del_irq_chip(max77693->irq, max77693->irq_data_charger);
+err_irq_charger:
+ regmap_del_irq_chip(max77693->irq, max77693->irq_data_topsys);
+err_irq_topsys:
+ regmap_del_irq_chip(max77693->irq, max77693->irq_data_led);
err_regmap_muic:
i2c_unregister_device(max77693->haptic);
err_i2c_haptic:
@@ -204,7 +277,12 @@ static int max77693_i2c_remove(struct i2c_client *i2c)
struct max77693_dev *max77693 = i2c_get_clientdata(i2c);
mfd_remove_devices(max77693->dev);
- max77693_irq_exit(max77693);
+
+ regmap_del_irq_chip(max77693->irq, max77693->irq_data_muic);
+ regmap_del_irq_chip(max77693->irq, max77693->irq_data_charger);
+ regmap_del_irq_chip(max77693->irq, max77693->irq_data_topsys);
+ regmap_del_irq_chip(max77693->irq, max77693->irq_data_led);
+
i2c_unregister_device(max77693->muic);
i2c_unregister_device(max77693->haptic);
@@ -222,8 +300,11 @@ static int max77693_suspend(struct device *dev)
struct i2c_client *i2c = container_of(dev, struct i2c_client, dev);
struct max77693_dev *max77693 = i2c_get_clientdata(i2c);
- if (device_may_wakeup(dev))
- irq_set_irq_wake(max77693->irq, 1);
+ if (device_may_wakeup(dev)) {
+ enable_irq_wake(max77693->irq);
+ disable_irq(max77693->irq);
+ }
+
return 0;
}
@@ -232,9 +313,12 @@ static int max77693_resume(struct device *dev)
struct i2c_client *i2c = container_of(dev, struct i2c_client, dev);
struct max77693_dev *max77693 = i2c_get_clientdata(i2c);
- if (device_may_wakeup(dev))
- irq_set_irq_wake(max77693->irq, 0);
- return max77693_irq_resume(max77693);
+ if (device_may_wakeup(dev)) {
+ disable_irq_wake(max77693->irq);
+ enable_irq(max77693->irq);
+ }
+
+ return 0;
}
static const struct dev_pm_ops max77693_pm = {
diff --git a/drivers/misc/bh1770glc.c b/drivers/misc/bh1770glc.c
index 99a04686e45f..7b55f8a152d4 100644
--- a/drivers/misc/bh1770glc.c
+++ b/drivers/misc/bh1770glc.c
@@ -1185,7 +1185,7 @@ static int bh1770_probe(struct i2c_client *client,
struct bh1770_chip *chip;
int err;
- chip = kzalloc(sizeof *chip, GFP_KERNEL);
+ chip = devm_kzalloc(&client->dev, sizeof *chip, GFP_KERNEL);
if (!chip)
return -ENOMEM;
@@ -1198,8 +1198,7 @@ static int bh1770_probe(struct i2c_client *client,
if (client->dev.platform_data == NULL) {
dev_err(&client->dev, "platform data is mandatory\n");
- err = -EINVAL;
- goto fail1;
+ return -EINVAL;
}
chip->pdata = client->dev.platform_data;
@@ -1224,24 +1223,24 @@ static int bh1770_probe(struct i2c_client *client,
chip->regs[0].supply = reg_vcc;
chip->regs[1].supply = reg_vleds;
- err = regulator_bulk_get(&client->dev,
- ARRAY_SIZE(chip->regs), chip->regs);
+ err = devm_regulator_bulk_get(&client->dev,
+ ARRAY_SIZE(chip->regs), chip->regs);
if (err < 0) {
dev_err(&client->dev, "Cannot get regulators\n");
- goto fail1;
+ return err;
}
err = regulator_bulk_enable(ARRAY_SIZE(chip->regs),
chip->regs);
if (err < 0) {
dev_err(&client->dev, "Cannot enable regulators\n");
- goto fail2;
+ return err;
}
usleep_range(BH1770_STARTUP_DELAY, BH1770_STARTUP_DELAY * 2);
err = bh1770_detect(chip);
if (err < 0)
- goto fail3;
+ goto fail0;
/* Start chip */
bh1770_chip_on(chip);
@@ -1252,14 +1251,14 @@ static int bh1770_probe(struct i2c_client *client,
if (chip->lux_corr == 0) {
dev_err(&client->dev, "Improper correction values\n");
err = -EINVAL;
- goto fail3;
+ goto fail0;
}
if (chip->pdata->setup_resources) {
err = chip->pdata->setup_resources();
if (err) {
err = -EINVAL;
- goto fail3;
+ goto fail0;
}
}
@@ -1267,7 +1266,7 @@ static int bh1770_probe(struct i2c_client *client,
&bh1770_attribute_group);
if (err < 0) {
dev_err(&chip->client->dev, "Sysfs registration failed\n");
- goto fail4;
+ goto fail1;
}
/*
@@ -1283,22 +1282,18 @@ static int bh1770_probe(struct i2c_client *client,
if (err) {
dev_err(&client->dev, "could not get IRQ %d\n",
client->irq);
- goto fail5;
+ goto fail2;
}
regulator_bulk_disable(ARRAY_SIZE(chip->regs), chip->regs);
return err;
-fail5:
+fail2:
sysfs_remove_group(&chip->client->dev.kobj,
&bh1770_attribute_group);
-fail4:
+fail1:
if (chip->pdata->release_resources)
chip->pdata->release_resources();
-fail3:
+fail0:
regulator_bulk_disable(ARRAY_SIZE(chip->regs), chip->regs);
-fail2:
- regulator_bulk_free(ARRAY_SIZE(chip->regs), chip->regs);
-fail1:
- kfree(chip);
return err;
}
@@ -1322,8 +1317,6 @@ static int bh1770_remove(struct i2c_client *client)
pm_runtime_disable(&client->dev);
pm_runtime_set_suspended(&client->dev);
- regulator_bulk_free(ARRAY_SIZE(chip->regs), chip->regs);
- kfree(chip);
return 0;
}
diff --git a/drivers/misc/bh1780gli.c b/drivers/misc/bh1780gli.c
index 48ea33d15a79..4c4a59b25537 100644
--- a/drivers/misc/bh1780gli.c
+++ b/drivers/misc/bh1780gli.c
@@ -149,50 +149,35 @@ static int bh1780_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
int ret;
- struct bh1780_data *ddata = NULL;
+ struct bh1780_data *ddata;
struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent);
- if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE)) {
- ret = -EIO;
- goto err_op_failed;
- }
+ if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE))
+ return -EIO;
- ddata = kzalloc(sizeof(struct bh1780_data), GFP_KERNEL);
- if (ddata == NULL) {
- ret = -ENOMEM;
- goto err_op_failed;
- }
+ ddata = devm_kzalloc(&client->dev, sizeof(struct bh1780_data),
+ GFP_KERNEL);
+ if (ddata == NULL)
+ return -ENOMEM;
ddata->client = client;
i2c_set_clientdata(client, ddata);
ret = bh1780_read(ddata, BH1780_REG_PARTID, "PART ID");
if (ret < 0)
- goto err_op_failed;
+ return ret;
dev_info(&client->dev, "Ambient Light Sensor, Rev : %d\n",
(ret & BH1780_REVMASK));
mutex_init(&ddata->lock);
- ret = sysfs_create_group(&client->dev.kobj, &bh1780_attr_group);
- if (ret)
- goto err_op_failed;
-
- return 0;
-
-err_op_failed:
- kfree(ddata);
- return ret;
+ return sysfs_create_group(&client->dev.kobj, &bh1780_attr_group);
}
static int bh1780_remove(struct i2c_client *client)
{
- struct bh1780_data *ddata;
-
- ddata = i2c_get_clientdata(client);
sysfs_remove_group(&client->dev.kobj, &bh1780_attr_group);
- kfree(ddata);
return 0;
}
diff --git a/drivers/misc/carma/carma-fpga.c b/drivers/misc/carma/carma-fpga.c
index 14d90eae605b..55e913b7eb11 100644
--- a/drivers/misc/carma/carma-fpga.c
+++ b/drivers/misc/carma/carma-fpga.c
@@ -954,10 +954,7 @@ static int data_debugfs_init(struct fpga_device *priv)
{
priv->dbg_entry = debugfs_create_file(drv_name, S_IRUGO, NULL, priv,
&data_debug_fops);
- if (IS_ERR(priv->dbg_entry))
- return PTR_ERR(priv->dbg_entry);
-
- return 0;
+ return PTR_ERR_OR_ZERO(priv->dbg_entry);
}
static void data_debugfs_exit(struct fpga_device *priv)
diff --git a/drivers/misc/dummy-irq.c b/drivers/misc/dummy-irq.c
index 4d0db15df115..acbbe0390be4 100644
--- a/drivers/misc/dummy-irq.c
+++ b/drivers/misc/dummy-irq.c
@@ -61,3 +61,4 @@ MODULE_LICENSE("GPL");
MODULE_AUTHOR("Jiri Kosina");
module_param(irq, uint, 0444);
MODULE_PARM_DESC(irq, "The IRQ to register for");
+MODULE_DESCRIPTION("Dummy IRQ handler driver");
diff --git a/drivers/misc/genwqe/Kconfig b/drivers/misc/genwqe/Kconfig
index 6069d8cd79d7..4c0a033cbfdb 100644
--- a/drivers/misc/genwqe/Kconfig
+++ b/drivers/misc/genwqe/Kconfig
@@ -11,3 +11,9 @@ menuconfig GENWQE
Enables PCIe card driver for IBM GenWQE accelerators.
The user-space interface is described in
include/linux/genwqe/genwqe_card.h.
+
+config GENWQE_PLATFORM_ERROR_RECOVERY
+ int "Use platform recovery procedures (0=off, 1=on)"
+ depends on GENWQE
+ default 1 if PPC64
+ default 0
diff --git a/drivers/misc/genwqe/card_base.c b/drivers/misc/genwqe/card_base.c
index 74d51c9bb858..43bbabc96b6c 100644
--- a/drivers/misc/genwqe/card_base.c
+++ b/drivers/misc/genwqe/card_base.c
@@ -38,7 +38,6 @@
#include <linux/notifier.h>
#include <linux/device.h>
#include <linux/log2.h>
-#include <linux/genwqe/genwqe_card.h>
#include "card_base.h"
#include "card_ddcb.h"
@@ -58,7 +57,7 @@ static struct dentry *debugfs_genwqe;
static struct genwqe_dev *genwqe_devices[GENWQE_CARD_NO_MAX];
/* PCI structure for identifying device by PCI vendor and device ID */
-static DEFINE_PCI_DEVICE_TABLE(genwqe_device_table) = {
+static const struct pci_device_id genwqe_device_table[] = {
{ .vendor = PCI_VENDOR_ID_IBM,
.device = PCI_DEVICE_GENWQE,
.subvendor = PCI_SUBVENDOR_ID_IBM,
@@ -140,6 +139,12 @@ static struct genwqe_dev *genwqe_dev_alloc(void)
cd->class_genwqe = class_genwqe;
cd->debugfs_genwqe = debugfs_genwqe;
+ /*
+ * This comes from kernel config option and can be overritten via
+ * debugfs.
+ */
+ cd->use_platform_recovery = CONFIG_GENWQE_PLATFORM_ERROR_RECOVERY;
+
init_waitqueue_head(&cd->queue_waitq);
spin_lock_init(&cd->file_lock);
@@ -761,6 +766,124 @@ static u64 genwqe_fir_checking(struct genwqe_dev *cd)
}
/**
+ * genwqe_pci_fundamental_reset() - trigger a PCIe fundamental reset on the slot
+ *
+ * Note: pci_set_pcie_reset_state() is not implemented on all archs, so this
+ * reset method will not work in all cases.
+ *
+ * Return: 0 on success or error code from pci_set_pcie_reset_state()
+ */
+static int genwqe_pci_fundamental_reset(struct pci_dev *pci_dev)
+{
+ int rc;
+
+ /*
+ * lock pci config space access from userspace,
+ * save state and issue PCIe fundamental reset
+ */
+ pci_cfg_access_lock(pci_dev);
+ pci_save_state(pci_dev);
+ rc = pci_set_pcie_reset_state(pci_dev, pcie_warm_reset);
+ if (!rc) {
+ /* keep PCIe reset asserted for 250ms */
+ msleep(250);
+ pci_set_pcie_reset_state(pci_dev, pcie_deassert_reset);
+ /* Wait for 2s to reload flash and train the link */
+ msleep(2000);
+ }
+ pci_restore_state(pci_dev);
+ pci_cfg_access_unlock(pci_dev);
+ return rc;
+}
+
+
+static int genwqe_platform_recovery(struct genwqe_dev *cd)
+{
+ struct pci_dev *pci_dev = cd->pci_dev;
+ int rc;
+
+ dev_info(&pci_dev->dev,
+ "[%s] resetting card for error recovery\n", __func__);
+
+ /* Clear out error injection flags */
+ cd->err_inject &= ~(GENWQE_INJECT_HARDWARE_FAILURE |
+ GENWQE_INJECT_GFIR_FATAL |
+ GENWQE_INJECT_GFIR_INFO);
+
+ genwqe_stop(cd);
+
+ /* Try recoverying the card with fundamental reset */
+ rc = genwqe_pci_fundamental_reset(pci_dev);
+ if (!rc) {
+ rc = genwqe_start(cd);
+ if (!rc)
+ dev_info(&pci_dev->dev,
+ "[%s] card recovered\n", __func__);
+ else
+ dev_err(&pci_dev->dev,
+ "[%s] err: cannot start card services! (err=%d)\n",
+ __func__, rc);
+ } else {
+ dev_err(&pci_dev->dev,
+ "[%s] card reset failed\n", __func__);
+ }
+
+ return rc;
+}
+
+/*
+ * genwqe_reload_bistream() - reload card bitstream
+ *
+ * Set the appropriate register and call fundamental reset to reaload the card
+ * bitstream.
+ *
+ * Return: 0 on success, error code otherwise
+ */
+static int genwqe_reload_bistream(struct genwqe_dev *cd)
+{
+ struct pci_dev *pci_dev = cd->pci_dev;
+ int rc;
+
+ dev_info(&pci_dev->dev,
+ "[%s] resetting card for bitstream reload\n",
+ __func__);
+
+ genwqe_stop(cd);
+
+ /*
+ * Cause a CPLD reprogram with the 'next_bitstream'
+ * partition on PCIe hot or fundamental reset
+ */
+ __genwqe_writeq(cd, IO_SLC_CFGREG_SOFTRESET,
+ (cd->softreset & 0xcull) | 0x70ull);
+
+ rc = genwqe_pci_fundamental_reset(pci_dev);
+ if (rc) {
+ /*
+ * A fundamental reset failure can be caused
+ * by lack of support on the arch, so we just
+ * log the error and try to start the card
+ * again.
+ */
+ dev_err(&pci_dev->dev,
+ "[%s] err: failed to reset card for bitstream reload\n",
+ __func__);
+ }
+
+ rc = genwqe_start(cd);
+ if (rc) {
+ dev_err(&pci_dev->dev,
+ "[%s] err: cannot start card services! (err=%d)\n",
+ __func__, rc);
+ return rc;
+ }
+ dev_info(&pci_dev->dev,
+ "[%s] card reloaded\n", __func__);
+ return 0;
+}
+
+
+/**
* genwqe_health_thread() - Health checking thread
*
* This thread is only started for the PF of the card.
@@ -786,6 +909,7 @@ static int genwqe_health_thread(void *data)
struct pci_dev *pci_dev = cd->pci_dev;
u64 gfir, gfir_masked, slu_unitcfg, app_unitcfg;
+ health_thread_begin:
while (!kthread_should_stop()) {
rc = wait_event_interruptible_timeout(cd->health_waitq,
(genwqe_health_check_cond(cd, &gfir) ||
@@ -846,6 +970,13 @@ static int genwqe_health_thread(void *data)
}
}
+ if (cd->card_state == GENWQE_CARD_RELOAD_BITSTREAM) {
+ /* Userspace requested card bitstream reload */
+ rc = genwqe_reload_bistream(cd);
+ if (rc)
+ goto fatal_error;
+ }
+
cd->last_gfir = gfir;
cond_resched();
}
@@ -853,6 +984,28 @@ static int genwqe_health_thread(void *data)
return 0;
fatal_error:
+ if (cd->use_platform_recovery) {
+ /*
+ * Since we use raw accessors, EEH errors won't be detected
+ * by the platform until we do a non-raw MMIO or config space
+ * read
+ */
+ readq(cd->mmio + IO_SLC_CFGREG_GFIR);
+
+ /* We do nothing if the card is going over PCI recovery */
+ if (pci_channel_offline(pci_dev))
+ return -EIO;
+
+ /*
+ * If it's supported by the platform, we try a fundamental reset
+ * to recover from a fatal error. Otherwise, we continue to wait
+ * for an external recovery procedure to take care of it.
+ */
+ rc = genwqe_platform_recovery(cd);
+ if (!rc)
+ goto health_thread_begin;
+ }
+
dev_err(&pci_dev->dev,
"[%s] card unusable. Please trigger unbind!\n", __func__);
@@ -958,6 +1111,9 @@ static int genwqe_pci_setup(struct genwqe_dev *cd)
pci_set_master(pci_dev);
pci_enable_pcie_error_reporting(pci_dev);
+ /* EEH recovery requires PCIe fundamental reset */
+ pci_dev->needs_freset = 1;
+
/* request complete BAR-0 space (length = 0) */
cd->mmio_len = pci_resource_len(pci_dev, 0);
cd->mmio = pci_iomap(pci_dev, 0, 0);
@@ -1096,23 +1252,40 @@ static pci_ers_result_t genwqe_err_error_detected(struct pci_dev *pci_dev,
dev_err(&pci_dev->dev, "[%s] state=%d\n", __func__, state);
- if (pci_dev == NULL)
- return PCI_ERS_RESULT_NEED_RESET;
-
cd = dev_get_drvdata(&pci_dev->dev);
if (cd == NULL)
- return PCI_ERS_RESULT_NEED_RESET;
+ return PCI_ERS_RESULT_DISCONNECT;
- switch (state) {
- case pci_channel_io_normal:
- return PCI_ERS_RESULT_CAN_RECOVER;
- case pci_channel_io_frozen:
- return PCI_ERS_RESULT_NEED_RESET;
- case pci_channel_io_perm_failure:
+ /* Stop the card */
+ genwqe_health_check_stop(cd);
+ genwqe_stop(cd);
+
+ /*
+ * On permanent failure, the PCI code will call device remove
+ * after the return of this function.
+ * genwqe_stop() can be called twice.
+ */
+ if (state == pci_channel_io_perm_failure) {
return PCI_ERS_RESULT_DISCONNECT;
+ } else {
+ genwqe_pci_remove(cd);
+ return PCI_ERS_RESULT_NEED_RESET;
}
+}
+
+static pci_ers_result_t genwqe_err_slot_reset(struct pci_dev *pci_dev)
+{
+ int rc;
+ struct genwqe_dev *cd = dev_get_drvdata(&pci_dev->dev);
- return PCI_ERS_RESULT_NEED_RESET;
+ rc = genwqe_pci_setup(cd);
+ if (!rc) {
+ return PCI_ERS_RESULT_RECOVERED;
+ } else {
+ dev_err(&pci_dev->dev,
+ "err: problems with PCI setup (err=%d)\n", rc);
+ return PCI_ERS_RESULT_DISCONNECT;
+ }
}
static pci_ers_result_t genwqe_err_result_none(struct pci_dev *dev)
@@ -1120,8 +1293,22 @@ static pci_ers_result_t genwqe_err_result_none(struct pci_dev *dev)
return PCI_ERS_RESULT_NONE;
}
-static void genwqe_err_resume(struct pci_dev *dev)
+static void genwqe_err_resume(struct pci_dev *pci_dev)
{
+ int rc;
+ struct genwqe_dev *cd = dev_get_drvdata(&pci_dev->dev);
+
+ rc = genwqe_start(cd);
+ if (!rc) {
+ rc = genwqe_health_check_start(cd);
+ if (rc)
+ dev_err(&pci_dev->dev,
+ "err: cannot start health checking! (err=%d)\n",
+ rc);
+ } else {
+ dev_err(&pci_dev->dev,
+ "err: cannot start card services! (err=%d)\n", rc);
+ }
}
static int genwqe_sriov_configure(struct pci_dev *dev, int numvfs)
@@ -1144,7 +1331,7 @@ static struct pci_error_handlers genwqe_err_handler = {
.error_detected = genwqe_err_error_detected,
.mmio_enabled = genwqe_err_result_none,
.link_reset = genwqe_err_result_none,
- .slot_reset = genwqe_err_result_none,
+ .slot_reset = genwqe_err_slot_reset,
.resume = genwqe_err_resume,
};
diff --git a/drivers/misc/genwqe/card_base.h b/drivers/misc/genwqe/card_base.h
index 0e608a288603..67abd8cb2247 100644
--- a/drivers/misc/genwqe/card_base.h
+++ b/drivers/misc/genwqe/card_base.h
@@ -291,6 +291,8 @@ struct genwqe_dev {
struct task_struct *health_thread;
wait_queue_head_t health_waitq;
+ int use_platform_recovery; /* use platform recovery mechanisms */
+
/* char device */
dev_t devnum_genwqe; /* major/minor num card */
struct class *class_genwqe; /* reference to class object */
diff --git a/drivers/misc/genwqe/card_ddcb.c b/drivers/misc/genwqe/card_ddcb.c
index c8046db2d5a2..dc9851a5540e 100644
--- a/drivers/misc/genwqe/card_ddcb.c
+++ b/drivers/misc/genwqe/card_ddcb.c
@@ -1118,7 +1118,21 @@ static irqreturn_t genwqe_pf_isr(int irq, void *dev_id)
* safer, but slower for the good-case ... See above.
*/
gfir = __genwqe_readq(cd, IO_SLC_CFGREG_GFIR);
- if ((gfir & GFIR_ERR_TRIGGER) != 0x0) {
+ if (((gfir & GFIR_ERR_TRIGGER) != 0x0) &&
+ !pci_channel_offline(pci_dev)) {
+
+ if (cd->use_platform_recovery) {
+ /*
+ * Since we use raw accessors, EEH errors won't be
+ * detected by the platform until we do a non-raw
+ * MMIO or config space read
+ */
+ readq(cd->mmio + IO_SLC_CFGREG_GFIR);
+
+ /* Don't do anything if the PCI channel is frozen */
+ if (pci_channel_offline(pci_dev))
+ goto exit;
+ }
wake_up_interruptible(&cd->health_waitq);
@@ -1126,12 +1140,12 @@ static irqreturn_t genwqe_pf_isr(int irq, void *dev_id)
* By default GFIRs causes recovery actions. This
* count is just for debug when recovery is masked.
*/
- printk_ratelimited(KERN_ERR
- "%s %s: [%s] GFIR=%016llx\n",
- GENWQE_DEVNAME, dev_name(&pci_dev->dev),
- __func__, gfir);
+ dev_err_ratelimited(&pci_dev->dev,
+ "[%s] GFIR=%016llx\n",
+ __func__, gfir);
}
+ exit:
return IRQ_HANDLED;
}
@@ -1237,9 +1251,7 @@ int genwqe_setup_service_layer(struct genwqe_dev *cd)
}
rc = genwqe_set_interrupt_capability(cd, GENWQE_MSI_IRQS);
- if (rc > 0)
- rc = genwqe_set_interrupt_capability(cd, rc);
- if (rc != 0) {
+ if (rc) {
rc = -ENODEV;
goto stop_kthread;
}
diff --git a/drivers/misc/genwqe/card_debugfs.c b/drivers/misc/genwqe/card_debugfs.c
index 0a33ade64109..c9b4d6d0eb99 100644
--- a/drivers/misc/genwqe/card_debugfs.c
+++ b/drivers/misc/genwqe/card_debugfs.c
@@ -485,6 +485,13 @@ int genwqe_init_debugfs(struct genwqe_dev *cd)
goto err1;
}
+ file = debugfs_create_u32("use_platform_recovery", 0666, root,
+ &cd->use_platform_recovery);
+ if (!file) {
+ ret = -ENOMEM;
+ goto err1;
+ }
+
cd->debugfs_root = root;
return 0;
err1:
diff --git a/drivers/misc/genwqe/card_dev.c b/drivers/misc/genwqe/card_dev.c
index 1d2f163a1906..aae42555e2ca 100644
--- a/drivers/misc/genwqe/card_dev.c
+++ b/drivers/misc/genwqe/card_dev.c
@@ -1048,10 +1048,15 @@ static long genwqe_ioctl(struct file *filp, unsigned int cmd,
int rc = 0;
struct genwqe_file *cfile = (struct genwqe_file *)filp->private_data;
struct genwqe_dev *cd = cfile->cd;
+ struct pci_dev *pci_dev = cd->pci_dev;
struct genwqe_reg_io __user *io;
u64 val;
u32 reg_offs;
+ /* Return -EIO if card hit EEH */
+ if (pci_channel_offline(pci_dev))
+ return -EIO;
+
if (_IOC_TYPE(cmd) != GENWQE_IOC_CODE)
return -EINVAL;
diff --git a/drivers/misc/genwqe/card_sysfs.c b/drivers/misc/genwqe/card_sysfs.c
index a72a99266c3c..7232e40a3ad9 100644
--- a/drivers/misc/genwqe/card_sysfs.c
+++ b/drivers/misc/genwqe/card_sysfs.c
@@ -223,6 +223,30 @@ static ssize_t next_bitstream_store(struct device *dev,
}
static DEVICE_ATTR_RW(next_bitstream);
+static ssize_t reload_bitstream_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ int reload;
+ struct genwqe_dev *cd = dev_get_drvdata(dev);
+
+ if (kstrtoint(buf, 0, &reload) < 0)
+ return -EINVAL;
+
+ if (reload == 0x1) {
+ if (cd->card_state == GENWQE_CARD_UNUSED ||
+ cd->card_state == GENWQE_CARD_USED)
+ cd->card_state = GENWQE_CARD_RELOAD_BITSTREAM;
+ else
+ return -EIO;
+ } else {
+ return -EINVAL;
+ }
+
+ return count;
+}
+static DEVICE_ATTR_WO(reload_bitstream);
+
/*
* Create device_attribute structures / params: name, mode, show, store
* additional flag if valid in VF
@@ -239,6 +263,7 @@ static struct attribute *genwqe_attributes[] = {
&dev_attr_status.attr,
&dev_attr_freerunning_timer.attr,
&dev_attr_queue_working_time.attr,
+ &dev_attr_reload_bitstream.attr,
NULL,
};
diff --git a/drivers/misc/genwqe/card_utils.c b/drivers/misc/genwqe/card_utils.c
index 62cc6bb3f62e..a6400f09229c 100644
--- a/drivers/misc/genwqe/card_utils.c
+++ b/drivers/misc/genwqe/card_utils.c
@@ -53,12 +53,17 @@
*/
int __genwqe_writeq(struct genwqe_dev *cd, u64 byte_offs, u64 val)
{
+ struct pci_dev *pci_dev = cd->pci_dev;
+
if (cd->err_inject & GENWQE_INJECT_HARDWARE_FAILURE)
return -EIO;
if (cd->mmio == NULL)
return -EIO;
+ if (pci_channel_offline(pci_dev))
+ return -EIO;
+
__raw_writeq((__force u64)cpu_to_be64(val), cd->mmio + byte_offs);
return 0;
}
@@ -99,12 +104,17 @@ u64 __genwqe_readq(struct genwqe_dev *cd, u64 byte_offs)
*/
int __genwqe_writel(struct genwqe_dev *cd, u64 byte_offs, u32 val)
{
+ struct pci_dev *pci_dev = cd->pci_dev;
+
if (cd->err_inject & GENWQE_INJECT_HARDWARE_FAILURE)
return -EIO;
if (cd->mmio == NULL)
return -EIO;
+ if (pci_channel_offline(pci_dev))
+ return -EIO;
+
__raw_writel((__force u32)cpu_to_be32(val), cd->mmio + byte_offs);
return 0;
}
@@ -718,10 +728,12 @@ int genwqe_set_interrupt_capability(struct genwqe_dev *cd, int count)
int rc;
struct pci_dev *pci_dev = cd->pci_dev;
- rc = pci_enable_msi_exact(pci_dev, count);
- if (rc == 0)
- cd->flags |= GENWQE_FLAG_MSI_ENABLED;
- return rc;
+ rc = pci_enable_msi_range(pci_dev, 1, count);
+ if (rc < 0)
+ return rc;
+
+ cd->flags |= GENWQE_FLAG_MSI_ENABLED;
+ return 0;
}
/**
diff --git a/drivers/misc/genwqe/genwqe_driver.h b/drivers/misc/genwqe/genwqe_driver.h
index cd5263163a6e..a506e9aa2d57 100644
--- a/drivers/misc/genwqe/genwqe_driver.h
+++ b/drivers/misc/genwqe/genwqe_driver.h
@@ -36,7 +36,7 @@
#include <asm/byteorder.h>
#include <linux/genwqe/genwqe_card.h>
-#define DRV_VERS_STRING "2.0.15"
+#define DRV_VERS_STRING "2.0.21"
/*
* Static minor number assignement, until we decide/implement
diff --git a/drivers/misc/lattice-ecp3-config.c b/drivers/misc/lattice-ecp3-config.c
index 0a1565e63c71..7ffdb589841e 100644
--- a/drivers/misc/lattice-ecp3-config.c
+++ b/drivers/misc/lattice-ecp3-config.c
@@ -15,6 +15,7 @@
#include <linux/spi/spi.h>
#include <linux/platform_device.h>
#include <linux/delay.h>
+#include <asm/unaligned.h>
#define FIRMWARE_NAME "lattice-ecp3.bit"
@@ -91,8 +92,8 @@ static void firmware_load(const struct firmware *fw, void *context)
/* Trying to speak with the FPGA via SPI... */
txbuf[0] = FPGA_CMD_READ_ID;
ret = spi_write_then_read(spi, txbuf, 8, rxbuf, rx_len);
- dev_dbg(&spi->dev, "FPGA JTAG ID=%08x\n", *(u32 *)&rxbuf[4]);
- jedec_id = *(u32 *)&rxbuf[4];
+ jedec_id = get_unaligned_be32(&rxbuf[4]);
+ dev_dbg(&spi->dev, "FPGA JTAG ID=%08x\n", jedec_id);
for (i = 0; i < ARRAY_SIZE(ecp3_dev); i++) {
if (jedec_id == ecp3_dev[i].jedec_id)
@@ -109,7 +110,8 @@ static void firmware_load(const struct firmware *fw, void *context)
txbuf[0] = FPGA_CMD_READ_STATUS;
ret = spi_write_then_read(spi, txbuf, 8, rxbuf, rx_len);
- dev_dbg(&spi->dev, "FPGA Status=%08x\n", *(u32 *)&rxbuf[4]);
+ status = get_unaligned_be32(&rxbuf[4]);
+ dev_dbg(&spi->dev, "FPGA Status=%08x\n", status);
buffer = kzalloc(fw->size + 8, GFP_KERNEL);
if (!buffer) {
@@ -141,7 +143,7 @@ static void firmware_load(const struct firmware *fw, void *context)
for (i = 0; i < FPGA_CLEAR_LOOP_COUNT; i++) {
txbuf[0] = FPGA_CMD_READ_STATUS;
ret = spi_write_then_read(spi, txbuf, 8, rxbuf, rx_len);
- status = *(u32 *)&rxbuf[4];
+ status = get_unaligned_be32(&rxbuf[4]);
if (status == FPGA_STATUS_CLEARED)
break;
@@ -164,8 +166,8 @@ static void firmware_load(const struct firmware *fw, void *context)
txbuf[0] = FPGA_CMD_READ_STATUS;
ret = spi_write_then_read(spi, txbuf, 8, rxbuf, rx_len);
- dev_dbg(&spi->dev, "FPGA Status=%08x\n", *(u32 *)&rxbuf[4]);
- status = *(u32 *)&rxbuf[4];
+ status = get_unaligned_be32(&rxbuf[4]);
+ dev_dbg(&spi->dev, "FPGA Status=%08x\n", status);
/* Check result */
if (status & FPGA_STATUS_DONE)
@@ -196,7 +198,7 @@ static int lattice_ecp3_probe(struct spi_device *spi)
spi_set_drvdata(spi, data);
init_completion(&data->fw_loaded);
- err = request_firmware_nowait(THIS_MODULE, FW_ACTION_NOHOTPLUG,
+ err = request_firmware_nowait(THIS_MODULE, FW_ACTION_HOTPLUG,
FIRMWARE_NAME, &spi->dev,
GFP_KERNEL, spi, firmware_load);
if (err) {
diff --git a/drivers/misc/lkdtm.c b/drivers/misc/lkdtm.c
index d66a2f24f6b3..b5abe34120b8 100644
--- a/drivers/misc/lkdtm.c
+++ b/drivers/misc/lkdtm.c
@@ -870,3 +870,4 @@ module_init(lkdtm_module_init);
module_exit(lkdtm_module_exit);
MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("Kprobe module for testing crash dumps");
diff --git a/drivers/misc/mei/client.c b/drivers/misc/mei/client.c
index 59d20c599b16..324e1de93687 100644
--- a/drivers/misc/mei/client.c
+++ b/drivers/misc/mei/client.c
@@ -459,7 +459,7 @@ int mei_cl_disconnect(struct mei_cl *cl)
{
struct mei_device *dev;
struct mei_cl_cb *cb;
- int rets, err;
+ int rets;
if (WARN_ON(!cl || !cl->dev))
return -ENODEV;
@@ -491,6 +491,7 @@ int mei_cl_disconnect(struct mei_cl *cl)
cl_err(dev, cl, "failed to disconnect.\n");
goto free;
}
+ cl->timer_count = MEI_CONNECT_TIMEOUT;
mdelay(10); /* Wait for hardware disconnection ready */
list_add_tail(&cb->list, &dev->ctrl_rd_list.list);
} else {
@@ -500,23 +501,18 @@ int mei_cl_disconnect(struct mei_cl *cl)
}
mutex_unlock(&dev->device_lock);
- err = wait_event_timeout(dev->wait_recvd_msg,
+ wait_event_timeout(dev->wait_recvd_msg,
MEI_FILE_DISCONNECTED == cl->state,
mei_secs_to_jiffies(MEI_CL_CONNECT_TIMEOUT));
mutex_lock(&dev->device_lock);
+
if (MEI_FILE_DISCONNECTED == cl->state) {
rets = 0;
cl_dbg(dev, cl, "successfully disconnected from FW client.\n");
} else {
- rets = -ENODEV;
- if (MEI_FILE_DISCONNECTED != cl->state)
- cl_err(dev, cl, "wrong status client disconnect.\n");
-
- if (err)
- cl_dbg(dev, cl, "wait failed disconnect err=%d\n", err);
-
- cl_err(dev, cl, "failed to disconnect from FW client.\n");
+ cl_dbg(dev, cl, "timeout on disconnect from FW client.\n");
+ rets = -ETIME;
}
mei_io_list_flush(&dev->ctrl_rd_list, cl);
@@ -616,6 +612,7 @@ int mei_cl_connect(struct mei_cl *cl, struct file *file)
mutex_lock(&dev->device_lock);
if (cl->state != MEI_FILE_CONNECTED) {
+ cl->state = MEI_FILE_DISCONNECTED;
/* something went really wrong */
if (!cl->status)
cl->status = -EFAULT;
diff --git a/drivers/misc/mei/hw-me-regs.h b/drivers/misc/mei/hw-me-regs.h
index a7856c0ac576..c5feafdd58a8 100644
--- a/drivers/misc/mei/hw-me-regs.h
+++ b/drivers/misc/mei/hw-me-regs.h
@@ -115,6 +115,7 @@
#define MEI_DEV_ID_LPT_HR 0x8CBA /* Lynx Point H Refresh */
#define MEI_DEV_ID_WPT_LP 0x9CBA /* Wildcat Point LP */
+#define MEI_DEV_ID_WPT_LP_2 0x9CBB /* Wildcat Point LP 2 */
/* Host Firmware Status Registers in PCI Config Space */
#define PCI_CFG_HFS_1 0x40
diff --git a/drivers/misc/mei/hw-me.c b/drivers/misc/mei/hw-me.c
index 6a2d272cea43..a9a0d08f758e 100644
--- a/drivers/misc/mei/hw-me.c
+++ b/drivers/misc/mei/hw-me.c
@@ -710,64 +710,10 @@ end:
return IRQ_HANDLED;
}
-/**
- * mei_me_fw_status - retrieve fw status from the pci config space
- *
- * @dev: the device structure
- * @fw_status: fw status registers storage
- *
- * returns 0 on success an error code otherwise
- */
-static int mei_me_fw_status(struct mei_device *dev,
- struct mei_fw_status *fw_status)
-{
- const u32 pci_cfg_reg[] = {PCI_CFG_HFS_1, PCI_CFG_HFS_2};
- int i;
-
- if (!fw_status)
- return -EINVAL;
-
- switch (dev->pdev->device) {
- case MEI_DEV_ID_IBXPK_1:
- case MEI_DEV_ID_IBXPK_2:
- case MEI_DEV_ID_CPT_1:
- case MEI_DEV_ID_PBG_1:
- case MEI_DEV_ID_PPT_1:
- case MEI_DEV_ID_PPT_2:
- case MEI_DEV_ID_PPT_3:
- case MEI_DEV_ID_LPT_H:
- case MEI_DEV_ID_LPT_W:
- case MEI_DEV_ID_LPT_LP:
- case MEI_DEV_ID_LPT_HR:
- case MEI_DEV_ID_WPT_LP:
- fw_status->count = 2;
- break;
- case MEI_DEV_ID_ICH10_1:
- case MEI_DEV_ID_ICH10_2:
- case MEI_DEV_ID_ICH10_3:
- case MEI_DEV_ID_ICH10_4:
- fw_status->count = 1;
- break;
- default:
- fw_status->count = 0;
- break;
- }
-
- for (i = 0; i < fw_status->count && i < MEI_FW_STATUS_MAX; i++) {
- int ret;
- ret = pci_read_config_dword(dev->pdev,
- pci_cfg_reg[i], &fw_status->status[i]);
- if (ret)
- return ret;
- }
- return 0;
-}
-
static const struct mei_hw_ops mei_me_hw_ops = {
.pg_state = mei_me_pg_state,
- .fw_status = mei_me_fw_status,
.host_is_ready = mei_me_host_is_ready,
.hw_is_ready = mei_me_hw_is_ready,
diff --git a/drivers/misc/mei/hw-txe.c b/drivers/misc/mei/hw-txe.c
index 93273783dec5..f1cd166094f2 100644
--- a/drivers/misc/mei/hw-txe.c
+++ b/drivers/misc/mei/hw-txe.c
@@ -1042,40 +1042,8 @@ end:
return IRQ_HANDLED;
}
-
-/**
- * mei_txe_fw_status - retrieve fw status from the pci config space
- *
- * @dev: the device structure
- * @fw_status: fw status registers storage
- *
- * returns: 0 on success an error code otherwise
- */
-static int mei_txe_fw_status(struct mei_device *dev,
- struct mei_fw_status *fw_status)
-{
- const u32 pci_cfg_reg[] = {PCI_CFG_TXE_FW_STS0, PCI_CFG_TXE_FW_STS1};
- int i;
-
- if (!fw_status)
- return -EINVAL;
-
- fw_status->count = 2;
-
- for (i = 0; i < fw_status->count && i < MEI_FW_STATUS_MAX; i++) {
- int ret;
- ret = pci_read_config_dword(dev->pdev,
- pci_cfg_reg[i], &fw_status->status[i]);
- if (ret)
- return ret;
- }
-
- return 0;
-}
-
static const struct mei_hw_ops mei_txe_hw_ops = {
- .fw_status = mei_txe_fw_status,
.host_is_ready = mei_txe_host_is_ready,
.pg_state = mei_txe_pg_state,
diff --git a/drivers/misc/mei/main.c b/drivers/misc/mei/main.c
index 66f0a1a06451..401a3d526cd0 100644
--- a/drivers/misc/mei/main.c
+++ b/drivers/misc/mei/main.c
@@ -32,7 +32,6 @@
#include <linux/compat.h>
#include <linux/jiffies.h>
#include <linux/interrupt.h>
-#include <linux/miscdevice.h>
#include <linux/mei.h>
@@ -49,19 +48,12 @@
*/
static int mei_open(struct inode *inode, struct file *file)
{
- struct miscdevice *misc = file->private_data;
- struct pci_dev *pdev;
- struct mei_cl *cl;
struct mei_device *dev;
+ struct mei_cl *cl;
int err;
- if (!misc->parent)
- return -ENODEV;
-
- pdev = container_of(misc->parent, struct pci_dev, dev);
-
- dev = pci_get_drvdata(pdev);
+ dev = container_of(inode->i_cdev, struct mei_device, cdev);
if (!dev)
return -ENODEV;
@@ -667,46 +659,148 @@ static const struct file_operations mei_fops = {
.llseek = no_llseek
};
-/*
- * Misc Device Struct
+static struct class *mei_class;
+static dev_t mei_devt;
+#define MEI_MAX_DEVS MINORMASK
+static DEFINE_MUTEX(mei_minor_lock);
+static DEFINE_IDR(mei_idr);
+
+/**
+ * mei_minor_get - obtain next free device minor number
+ *
+ * @dev: device pointer
+ *
+ * returns allocated minor, or -ENOSPC if no free minor left
*/
-static struct miscdevice mei_misc_device = {
- .name = "mei",
- .fops = &mei_fops,
- .minor = MISC_DYNAMIC_MINOR,
-};
+static int mei_minor_get(struct mei_device *dev)
+{
+ int ret;
+
+ mutex_lock(&mei_minor_lock);
+ ret = idr_alloc(&mei_idr, dev, 0, MEI_MAX_DEVS, GFP_KERNEL);
+ if (ret >= 0)
+ dev->minor = ret;
+ else if (ret == -ENOSPC)
+ dev_err(&dev->pdev->dev, "too many mei devices\n");
+ mutex_unlock(&mei_minor_lock);
+ return ret;
+}
-int mei_register(struct mei_device *dev)
+/**
+ * mei_minor_free - mark device minor number as free
+ *
+ * @dev: device pointer
+ */
+static void mei_minor_free(struct mei_device *dev)
{
- int ret;
- mei_misc_device.parent = &dev->pdev->dev;
- ret = misc_register(&mei_misc_device);
- if (ret)
+ mutex_lock(&mei_minor_lock);
+ idr_remove(&mei_idr, dev->minor);
+ mutex_unlock(&mei_minor_lock);
+}
+
+int mei_register(struct mei_device *dev, struct device *parent)
+{
+ struct device *clsdev; /* class device */
+ int ret, devno;
+
+ ret = mei_minor_get(dev);
+ if (ret < 0)
return ret;
- if (mei_dbgfs_register(dev, mei_misc_device.name))
- dev_err(&dev->pdev->dev, "cannot register debugfs\n");
+ /* Fill in the data structures */
+ devno = MKDEV(MAJOR(mei_devt), dev->minor);
+ cdev_init(&dev->cdev, &mei_fops);
+ dev->cdev.owner = mei_fops.owner;
+
+ /* Add the device */
+ ret = cdev_add(&dev->cdev, devno, 1);
+ if (ret) {
+ dev_err(parent, "unable to add device %d:%d\n",
+ MAJOR(mei_devt), dev->minor);
+ goto err_dev_add;
+ }
+
+ clsdev = device_create(mei_class, parent, devno,
+ NULL, "mei%d", dev->minor);
+
+ if (IS_ERR(clsdev)) {
+ dev_err(parent, "unable to create device %d:%d\n",
+ MAJOR(mei_devt), dev->minor);
+ ret = PTR_ERR(clsdev);
+ goto err_dev_create;
+ }
+
+ ret = mei_dbgfs_register(dev, dev_name(clsdev));
+ if (ret) {
+ dev_err(clsdev, "cannot register debugfs ret = %d\n", ret);
+ goto err_dev_dbgfs;
+ }
return 0;
+
+err_dev_dbgfs:
+ device_destroy(mei_class, devno);
+err_dev_create:
+ cdev_del(&dev->cdev);
+err_dev_add:
+ mei_minor_free(dev);
+ return ret;
}
EXPORT_SYMBOL_GPL(mei_register);
void mei_deregister(struct mei_device *dev)
{
+ int devno;
+
+ devno = dev->cdev.dev;
+ cdev_del(&dev->cdev);
+
mei_dbgfs_deregister(dev);
- misc_deregister(&mei_misc_device);
- mei_misc_device.parent = NULL;
+
+ device_destroy(mei_class, devno);
+
+ mei_minor_free(dev);
}
EXPORT_SYMBOL_GPL(mei_deregister);
static int __init mei_init(void)
{
- return mei_cl_bus_init();
+ int ret;
+
+ mei_class = class_create(THIS_MODULE, "mei");
+ if (IS_ERR(mei_class)) {
+ pr_err("couldn't create class\n");
+ ret = PTR_ERR(mei_class);
+ goto err;
+ }
+
+ ret = alloc_chrdev_region(&mei_devt, 0, MEI_MAX_DEVS, "mei");
+ if (ret < 0) {
+ pr_err("unable to allocate char dev region\n");
+ goto err_class;
+ }
+
+ ret = mei_cl_bus_init();
+ if (ret < 0) {
+ pr_err("unable to initialize bus\n");
+ goto err_chrdev;
+ }
+
+ return 0;
+
+err_chrdev:
+ unregister_chrdev_region(mei_devt, MEI_MAX_DEVS);
+err_class:
+ class_destroy(mei_class);
+err:
+ return ret;
}
static void __exit mei_exit(void)
{
+ unregister_chrdev_region(mei_devt, MEI_MAX_DEVS);
+ class_destroy(mei_class);
mei_cl_bus_exit();
}
diff --git a/drivers/misc/mei/mei_dev.h b/drivers/misc/mei/mei_dev.h
index 5c7e990e2f22..0b0d6135543b 100644
--- a/drivers/misc/mei/mei_dev.h
+++ b/drivers/misc/mei/mei_dev.h
@@ -227,7 +227,6 @@ struct mei_cl {
/** struct mei_hw_ops
*
- * @fw_status - read FW status from PCI config space
* @host_is_ready - query for host readiness
* @hw_is_ready - query if hw is ready
@@ -255,8 +254,6 @@ struct mei_cl {
*/
struct mei_hw_ops {
- int (*fw_status)(struct mei_device *dev,
- struct mei_fw_status *fw_status);
bool (*host_is_ready)(struct mei_device *dev);
bool (*hw_is_ready)(struct mei_device *dev);
@@ -400,6 +397,10 @@ struct mei_cfg {
/**
* struct mei_device - MEI private device struct
+ * @pdev - pointer to pci device struct
+ * @cdev - character device
+ * @minor - minor number allocated for device
+ *
* @reset_count - limits the number of consecutive resets
* @hbm_state - state of host bus message protocol
* @pg_event - power gating event
@@ -412,6 +413,9 @@ struct mei_cfg {
*/
struct mei_device {
struct pci_dev *pdev; /* pointer to pci device struct */
+ struct cdev cdev;
+ int minor;
+
/*
* lists of queues
*/
@@ -741,7 +745,7 @@ static inline int mei_dbgfs_register(struct mei_device *dev, const char *name)
static inline void mei_dbgfs_deregister(struct mei_device *dev) {}
#endif /* CONFIG_DEBUG_FS */
-int mei_register(struct mei_device *dev);
+int mei_register(struct mei_device *dev, struct device *parent);
void mei_deregister(struct mei_device *dev);
#define MEI_HDR_FMT "hdr:host=%02d me=%02d len=%d internal=%1d comp=%1d"
diff --git a/drivers/misc/mei/pci-me.c b/drivers/misc/mei/pci-me.c
index 1b46c64a649f..a0e9422b55a2 100644
--- a/drivers/misc/mei/pci-me.c
+++ b/drivers/misc/mei/pci-me.c
@@ -31,7 +31,6 @@
#include <linux/compat.h>
#include <linux/jiffies.h>
#include <linux/interrupt.h>
-#include <linux/miscdevice.h>
#include <linux/pm_runtime.h>
@@ -82,6 +81,7 @@ static const struct pci_device_id mei_me_pci_tbl[] = {
{MEI_PCI_DEVICE(MEI_DEV_ID_LPT_LP, mei_me_pch_cfg)},
{MEI_PCI_DEVICE(MEI_DEV_ID_LPT_HR, mei_me_lpt_cfg)},
{MEI_PCI_DEVICE(MEI_DEV_ID_WPT_LP, mei_me_pch_cfg)},
+ {MEI_PCI_DEVICE(MEI_DEV_ID_WPT_LP_2, mei_me_pch_cfg)},
/* required last entry */
{0, }
@@ -207,7 +207,7 @@ static int mei_me_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
pm_runtime_set_autosuspend_delay(&pdev->dev, MEI_ME_RPM_TIMEOUT);
pm_runtime_use_autosuspend(&pdev->dev);
- err = mei_register(dev);
+ err = mei_register(dev, &pdev->dev);
if (err)
goto release_irq;
@@ -369,7 +369,7 @@ static int mei_me_pm_runtime_idle(struct device *device)
if (!dev)
return -ENODEV;
if (mei_write_is_idle(dev))
- pm_schedule_suspend(device, MEI_ME_RPM_TIMEOUT * 2);
+ pm_runtime_autosuspend(device);
return -EBUSY;
}
diff --git a/drivers/misc/mei/pci-txe.c b/drivers/misc/mei/pci-txe.c
index 2343c6236df9..19de57368b7a 100644
--- a/drivers/misc/mei/pci-txe.c
+++ b/drivers/misc/mei/pci-txe.c
@@ -149,7 +149,7 @@ static int mei_txe_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
pm_runtime_set_autosuspend_delay(&pdev->dev, MEI_TXI_RPM_TIMEOUT);
pm_runtime_use_autosuspend(&pdev->dev);
- err = mei_register(dev);
+ err = mei_register(dev, &pdev->dev);
if (err)
goto release_irq;
@@ -306,7 +306,7 @@ static int mei_txe_pm_runtime_idle(struct device *device)
if (!dev)
return -ENODEV;
if (mei_write_is_idle(dev))
- pm_schedule_suspend(device, MEI_TXI_RPM_TIMEOUT * 2);
+ pm_runtime_autosuspend(device);
return -EBUSY;
}
diff --git a/drivers/misc/mic/Kconfig b/drivers/misc/mic/Kconfig
index 462a5b1d8651..cc4eef040c14 100644
--- a/drivers/misc/mic/Kconfig
+++ b/drivers/misc/mic/Kconfig
@@ -1,8 +1,25 @@
+comment "Intel MIC Bus Driver"
+
+config INTEL_MIC_BUS
+ tristate "Intel MIC Bus Driver"
+ depends on 64BIT && PCI && X86 && X86_DEV_DMA_OPS
+ help
+ This option is selected by any driver which registers a
+ device or driver on the MIC Bus, such as CONFIG_INTEL_MIC_HOST,
+ CONFIG_INTEL_MIC_CARD, CONFIG_INTEL_MIC_X100_DMA etc.
+
+ If you are building a host/card kernel with an Intel MIC device
+ then say M (recommended) or Y, else say N. If unsure say N.
+
+ More information about the Intel MIC family as well as the Linux
+ OS and tools for MIC to use with this driver are available from
+ <http://software.intel.com/en-us/mic-developer>.
+
comment "Intel MIC Host Driver"
config INTEL_MIC_HOST
tristate "Intel MIC Host Driver"
- depends on 64BIT && PCI && X86
+ depends on 64BIT && PCI && X86 && INTEL_MIC_BUS
select VHOST_RING
help
This enables Host Driver support for the Intel Many Integrated
@@ -22,7 +39,7 @@ comment "Intel MIC Card Driver"
config INTEL_MIC_CARD
tristate "Intel MIC Card Driver"
- depends on 64BIT && X86
+ depends on 64BIT && X86 && INTEL_MIC_BUS
select VIRTIO
help
This enables card driver support for the Intel Many Integrated
diff --git a/drivers/misc/mic/Makefile b/drivers/misc/mic/Makefile
index 05b34d683a58..e9bf148755e2 100644
--- a/drivers/misc/mic/Makefile
+++ b/drivers/misc/mic/Makefile
@@ -4,3 +4,4 @@
#
obj-$(CONFIG_INTEL_MIC_HOST) += host/
obj-$(CONFIG_INTEL_MIC_CARD) += card/
+obj-$(CONFIG_INTEL_MIC_BUS) += bus/
diff --git a/drivers/misc/mic/bus/Makefile b/drivers/misc/mic/bus/Makefile
new file mode 100644
index 000000000000..d85c7f2a0af4
--- /dev/null
+++ b/drivers/misc/mic/bus/Makefile
@@ -0,0 +1,5 @@
+#
+# Makefile - Intel MIC Linux driver.
+# Copyright(c) 2014, Intel Corporation.
+#
+obj-$(CONFIG_INTEL_MIC_BUS) += mic_bus.o
diff --git a/drivers/misc/mic/bus/mic_bus.c b/drivers/misc/mic/bus/mic_bus.c
new file mode 100644
index 000000000000..961ae90aae47
--- /dev/null
+++ b/drivers/misc/mic/bus/mic_bus.c
@@ -0,0 +1,218 @@
+/*
+ * Intel MIC Platform Software Stack (MPSS)
+ *
+ * Copyright(c) 2014 Intel Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License, version 2, as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * The full GNU General Public License is included in this distribution in
+ * the file called "COPYING".
+ *
+ * Intel MIC Bus driver.
+ *
+ * This implementation is very similar to the the virtio bus driver
+ * implementation @ drivers/virtio/virtio.c
+ */
+#include <linux/slab.h>
+#include <linux/module.h>
+#include <linux/idr.h>
+#include <linux/mic_bus.h>
+
+/* Unique numbering for mbus devices. */
+static DEFINE_IDA(mbus_index_ida);
+
+static ssize_t device_show(struct device *d,
+ struct device_attribute *attr, char *buf)
+{
+ struct mbus_device *dev = dev_to_mbus(d);
+ return sprintf(buf, "0x%04x\n", dev->id.device);
+}
+static DEVICE_ATTR_RO(device);
+
+static ssize_t vendor_show(struct device *d,
+ struct device_attribute *attr, char *buf)
+{
+ struct mbus_device *dev = dev_to_mbus(d);
+ return sprintf(buf, "0x%04x\n", dev->id.vendor);
+}
+static DEVICE_ATTR_RO(vendor);
+
+static ssize_t modalias_show(struct device *d,
+ struct device_attribute *attr, char *buf)
+{
+ struct mbus_device *dev = dev_to_mbus(d);
+ return sprintf(buf, "mbus:d%08Xv%08X\n",
+ dev->id.device, dev->id.vendor);
+}
+static DEVICE_ATTR_RO(modalias);
+
+static struct attribute *mbus_dev_attrs[] = {
+ &dev_attr_device.attr,
+ &dev_attr_vendor.attr,
+ &dev_attr_modalias.attr,
+ NULL,
+};
+ATTRIBUTE_GROUPS(mbus_dev);
+
+static inline int mbus_id_match(const struct mbus_device *dev,
+ const struct mbus_device_id *id)
+{
+ if (id->device != dev->id.device && id->device != MBUS_DEV_ANY_ID)
+ return 0;
+
+ return id->vendor == MBUS_DEV_ANY_ID || id->vendor == dev->id.vendor;
+}
+
+/*
+ * This looks through all the IDs a driver claims to support. If any of them
+ * match, we return 1 and the kernel will call mbus_dev_probe().
+ */
+static int mbus_dev_match(struct device *dv, struct device_driver *dr)
+{
+ unsigned int i;
+ struct mbus_device *dev = dev_to_mbus(dv);
+ const struct mbus_device_id *ids;
+
+ ids = drv_to_mbus(dr)->id_table;
+ for (i = 0; ids[i].device; i++)
+ if (mbus_id_match(dev, &ids[i]))
+ return 1;
+ return 0;
+}
+
+static int mbus_uevent(struct device *dv, struct kobj_uevent_env *env)
+{
+ struct mbus_device *dev = dev_to_mbus(dv);
+
+ return add_uevent_var(env, "MODALIAS=mbus:d%08Xv%08X",
+ dev->id.device, dev->id.vendor);
+}
+
+static int mbus_dev_probe(struct device *d)
+{
+ int err;
+ struct mbus_device *dev = dev_to_mbus(d);
+ struct mbus_driver *drv = drv_to_mbus(dev->dev.driver);
+
+ err = drv->probe(dev);
+ if (!err)
+ if (drv->scan)
+ drv->scan(dev);
+ return err;
+}
+
+static int mbus_dev_remove(struct device *d)
+{
+ struct mbus_device *dev = dev_to_mbus(d);
+ struct mbus_driver *drv = drv_to_mbus(dev->dev.driver);
+
+ drv->remove(dev);
+ return 0;
+}
+
+static struct bus_type mic_bus = {
+ .name = "mic_bus",
+ .match = mbus_dev_match,
+ .dev_groups = mbus_dev_groups,
+ .uevent = mbus_uevent,
+ .probe = mbus_dev_probe,
+ .remove = mbus_dev_remove,
+};
+
+int mbus_register_driver(struct mbus_driver *driver)
+{
+ driver->driver.bus = &mic_bus;
+ return driver_register(&driver->driver);
+}
+EXPORT_SYMBOL_GPL(mbus_register_driver);
+
+void mbus_unregister_driver(struct mbus_driver *driver)
+{
+ driver_unregister(&driver->driver);
+}
+EXPORT_SYMBOL_GPL(mbus_unregister_driver);
+
+static void mbus_release_dev(struct device *d)
+{
+ struct mbus_device *mbdev = dev_to_mbus(d);
+ kfree(mbdev);
+}
+
+struct mbus_device *
+mbus_register_device(struct device *pdev, int id, struct dma_map_ops *dma_ops,
+ struct mbus_hw_ops *hw_ops, void __iomem *mmio_va)
+{
+ int ret;
+ struct mbus_device *mbdev;
+
+ mbdev = kzalloc(sizeof(*mbdev), GFP_KERNEL);
+ if (!mbdev)
+ return ERR_PTR(-ENOMEM);
+
+ mbdev->mmio_va = mmio_va;
+ mbdev->dev.parent = pdev;
+ mbdev->id.device = id;
+ mbdev->id.vendor = MBUS_DEV_ANY_ID;
+ mbdev->dev.archdata.dma_ops = dma_ops;
+ mbdev->dev.dma_mask = &mbdev->dev.coherent_dma_mask;
+ dma_set_mask(&mbdev->dev, DMA_BIT_MASK(64));
+ mbdev->dev.release = mbus_release_dev;
+ mbdev->hw_ops = hw_ops;
+ mbdev->dev.bus = &mic_bus;
+
+ /* Assign a unique device index and hence name. */
+ ret = ida_simple_get(&mbus_index_ida, 0, 0, GFP_KERNEL);
+ if (ret < 0)
+ goto free_mbdev;
+
+ mbdev->index = ret;
+ dev_set_name(&mbdev->dev, "mbus-dev%u", mbdev->index);
+ /*
+ * device_register() causes the bus infrastructure to look for a
+ * matching driver.
+ */
+ ret = device_register(&mbdev->dev);
+ if (ret)
+ goto ida_remove;
+ return mbdev;
+ida_remove:
+ ida_simple_remove(&mbus_index_ida, mbdev->index);
+free_mbdev:
+ kfree(mbdev);
+ return ERR_PTR(ret);
+}
+EXPORT_SYMBOL_GPL(mbus_register_device);
+
+void mbus_unregister_device(struct mbus_device *mbdev)
+{
+ int index = mbdev->index; /* save for after device release */
+
+ device_unregister(&mbdev->dev);
+ ida_simple_remove(&mbus_index_ida, index);
+}
+EXPORT_SYMBOL_GPL(mbus_unregister_device);
+
+static int __init mbus_init(void)
+{
+ return bus_register(&mic_bus);
+}
+
+static void __exit mbus_exit(void)
+{
+ bus_unregister(&mic_bus);
+ ida_destroy(&mbus_index_ida);
+}
+
+core_initcall(mbus_init);
+module_exit(mbus_exit);
+
+MODULE_AUTHOR("Intel Corporation");
+MODULE_DESCRIPTION("Intel(R) MIC Bus driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/misc/mic/card/mic_device.c b/drivers/misc/mic/card/mic_device.c
index d0980ff96833..83819eee553b 100644
--- a/drivers/misc/mic/card/mic_device.c
+++ b/drivers/misc/mic/card/mic_device.c
@@ -83,8 +83,8 @@ static int mic_shutdown_init(void)
int shutdown_db;
shutdown_db = mic_next_card_db();
- shutdown_cookie = mic_request_card_irq(mic_shutdown_isr,
- "Shutdown", mdrv, shutdown_db);
+ shutdown_cookie = mic_request_card_irq(mic_shutdown_isr, NULL,
+ "Shutdown", mdrv, shutdown_db);
if (IS_ERR(shutdown_cookie))
rc = PTR_ERR(shutdown_cookie);
else
@@ -136,7 +136,8 @@ static void mic_dp_uninit(void)
/**
* mic_request_card_irq - request an irq.
*
- * @func: The callback function that handles the interrupt.
+ * @handler: interrupt handler passed to request_threaded_irq.
+ * @thread_fn: thread fn. passed to request_threaded_irq.
* @name: The ASCII name of the callee requesting the irq.
* @data: private data that is returned back when calling the
* function handler.
@@ -149,17 +150,19 @@ static void mic_dp_uninit(void)
* error code.
*
*/
-struct mic_irq *mic_request_card_irq(irqreturn_t (*func)(int irq, void *data),
- const char *name, void *data, int index)
+struct mic_irq *
+mic_request_card_irq(irq_handler_t handler,
+ irq_handler_t thread_fn, const char *name,
+ void *data, int index)
{
int rc = 0;
unsigned long cookie;
struct mic_driver *mdrv = g_drv;
- rc = request_irq(mic_db_to_irq(mdrv, index), func,
- 0, name, data);
+ rc = request_threaded_irq(mic_db_to_irq(mdrv, index), handler,
+ thread_fn, 0, name, data);
if (rc) {
- dev_err(mdrv->dev, "request_irq failed rc = %d\n", rc);
+ dev_err(mdrv->dev, "request_threaded_irq failed rc = %d\n", rc);
goto err;
}
mdrv->irq_info.irq_usage_count[index]++;
@@ -172,9 +175,9 @@ err:
/**
* mic_free_card_irq - free irq.
*
- * @cookie: cookie obtained during a successful call to mic_request_irq
+ * @cookie: cookie obtained during a successful call to mic_request_threaded_irq
* @data: private data specified by the calling function during the
- * mic_request_irq
+ * mic_request_threaded_irq
*
* returns: none.
*/
diff --git a/drivers/misc/mic/card/mic_device.h b/drivers/misc/mic/card/mic_device.h
index 306f502be95e..844be8fc9b22 100644
--- a/drivers/misc/mic/card/mic_device.h
+++ b/drivers/misc/mic/card/mic_device.h
@@ -30,6 +30,8 @@
#include <linux/workqueue.h>
#include <linux/io.h>
#include <linux/irqreturn.h>
+#include <linux/interrupt.h>
+#include <linux/mic_bus.h>
/**
* struct mic_intr_info - Contains h/w specific interrupt sources info
@@ -70,6 +72,7 @@ struct mic_device {
* @hotplug_work: Hot plug work for adding/removing virtio devices.
* @irq_info: The OS specific irq information
* @intr_info: H/W specific interrupt information.
+ * @dma_mbdev: dma device on the MIC virtual bus.
*/
struct mic_driver {
char name[20];
@@ -80,6 +83,7 @@ struct mic_driver {
struct work_struct hotplug_work;
struct mic_irq_info irq_info;
struct mic_intr_info intr_info;
+ struct mbus_device *dma_mbdev;
};
/**
@@ -116,8 +120,9 @@ mic_mmio_write(struct mic_mw *mw, u32 val, u32 offset)
int mic_driver_init(struct mic_driver *mdrv);
void mic_driver_uninit(struct mic_driver *mdrv);
int mic_next_card_db(void);
-struct mic_irq *mic_request_card_irq(irqreturn_t (*func)(int irq, void *data),
- const char *name, void *data, int intr_src);
+struct mic_irq *
+mic_request_card_irq(irq_handler_t handler, irq_handler_t thread_fn,
+ const char *name, void *data, int intr_src);
void mic_free_card_irq(struct mic_irq *cookie, void *data);
u32 mic_read_spad(struct mic_device *mdev, unsigned int idx);
void mic_send_intr(struct mic_device *mdev, int doorbell);
diff --git a/drivers/misc/mic/card/mic_virtio.c b/drivers/misc/mic/card/mic_virtio.c
index 653799b96bfa..f14b60080c21 100644
--- a/drivers/misc/mic/card/mic_virtio.c
+++ b/drivers/misc/mic/card/mic_virtio.c
@@ -417,7 +417,7 @@ static int mic_add_device(struct mic_device_desc __iomem *d,
virtio_db = mic_next_card_db();
mvdev->virtio_cookie = mic_request_card_irq(mic_virtio_intr_handler,
- "virtio intr", mvdev, virtio_db);
+ NULL, "virtio intr", mvdev, virtio_db);
if (IS_ERR(mvdev->virtio_cookie)) {
ret = PTR_ERR(mvdev->virtio_cookie);
goto kfree;
@@ -606,8 +606,9 @@ int mic_devices_init(struct mic_driver *mdrv)
mic_scan_devices(mdrv, !REMOVE_DEVICES);
config_db = mic_next_card_db();
- virtio_config_cookie = mic_request_card_irq(mic_extint_handler,
- "virtio_config_intr", mdrv, config_db);
+ virtio_config_cookie = mic_request_card_irq(mic_extint_handler, NULL,
+ "virtio_config_intr", mdrv,
+ config_db);
if (IS_ERR(virtio_config_cookie)) {
rc = PTR_ERR(virtio_config_cookie);
goto exit;
diff --git a/drivers/misc/mic/card/mic_x100.c b/drivers/misc/mic/card/mic_x100.c
index 2868945c9a4d..9d57545d64f6 100644
--- a/drivers/misc/mic/card/mic_x100.c
+++ b/drivers/misc/mic/card/mic_x100.c
@@ -148,6 +148,47 @@ void mic_card_unmap(struct mic_device *mdev, void __iomem *addr)
iounmap(addr);
}
+static inline struct mic_driver *mbdev_to_mdrv(struct mbus_device *mbdev)
+{
+ return dev_get_drvdata(mbdev->dev.parent);
+}
+
+static struct mic_irq *
+_mic_request_threaded_irq(struct mbus_device *mbdev,
+ irq_handler_t handler, irq_handler_t thread_fn,
+ const char *name, void *data, int intr_src)
+{
+ int rc = 0;
+ unsigned int irq = intr_src;
+ unsigned long cookie = irq;
+
+ rc = request_threaded_irq(irq, handler, thread_fn, 0, name, data);
+ if (rc) {
+ dev_err(mbdev_to_mdrv(mbdev)->dev,
+ "request_threaded_irq failed rc = %d\n", rc);
+ return ERR_PTR(rc);
+ }
+ return (struct mic_irq *)cookie;
+}
+
+static void _mic_free_irq(struct mbus_device *mbdev,
+ struct mic_irq *cookie, void *data)
+{
+ unsigned long irq = (unsigned long)cookie;
+ free_irq(irq, data);
+}
+
+static void _mic_ack_interrupt(struct mbus_device *mbdev, int num)
+{
+ mic_ack_interrupt(&mbdev_to_mdrv(mbdev)->mdev);
+}
+
+static struct mbus_hw_ops mbus_hw_ops = {
+ .request_threaded_irq = _mic_request_threaded_irq,
+ .free_irq = _mic_free_irq,
+ .ack_interrupt = _mic_ack_interrupt,
+};
+
static int __init mic_probe(struct platform_device *pdev)
{
struct mic_driver *mdrv = &g_drv;
@@ -159,32 +200,41 @@ static int __init mic_probe(struct platform_device *pdev)
mdev->mmio.pa = MIC_X100_MMIO_BASE;
mdev->mmio.len = MIC_X100_MMIO_LEN;
- mdev->mmio.va = ioremap(MIC_X100_MMIO_BASE, MIC_X100_MMIO_LEN);
+ mdev->mmio.va = devm_ioremap(&pdev->dev, MIC_X100_MMIO_BASE,
+ MIC_X100_MMIO_LEN);
if (!mdev->mmio.va) {
dev_err(&pdev->dev, "Cannot remap MMIO BAR\n");
rc = -EIO;
goto done;
}
mic_hw_intr_init(mdrv);
+ platform_set_drvdata(pdev, mdrv);
+ mdrv->dma_mbdev = mbus_register_device(mdrv->dev, MBUS_DEV_DMA_MIC,
+ NULL, &mbus_hw_ops,
+ mdrv->mdev.mmio.va);
+ if (IS_ERR(mdrv->dma_mbdev)) {
+ rc = PTR_ERR(mdrv->dma_mbdev);
+ dev_err(&pdev->dev, "mbus_add_device failed rc %d\n", rc);
+ goto done;
+ }
rc = mic_driver_init(mdrv);
if (rc) {
dev_err(&pdev->dev, "mic_driver_init failed rc %d\n", rc);
- goto iounmap;
+ goto remove_dma;
}
done:
return rc;
-iounmap:
- iounmap(mdev->mmio.va);
+remove_dma:
+ mbus_unregister_device(mdrv->dma_mbdev);
return rc;
}
static int mic_remove(struct platform_device *pdev)
{
struct mic_driver *mdrv = &g_drv;
- struct mic_device *mdev = &mdrv->mdev;
mic_driver_uninit(mdrv);
- iounmap(mdev->mmio.va);
+ mbus_unregister_device(mdrv->dma_mbdev);
return 0;
}
diff --git a/drivers/misc/mic/host/mic_boot.c b/drivers/misc/mic/host/mic_boot.c
index b75c6b5cc20f..ff2b0fb1a6be 100644
--- a/drivers/misc/mic/host/mic_boot.c
+++ b/drivers/misc/mic/host/mic_boot.c
@@ -23,11 +23,70 @@
#include <linux/pci.h>
#include <linux/mic_common.h>
+#include <linux/mic_bus.h>
#include "../common/mic_dev.h"
#include "mic_device.h"
#include "mic_smpt.h"
#include "mic_virtio.h"
+static inline struct mic_device *mbdev_to_mdev(struct mbus_device *mbdev)
+{
+ return dev_get_drvdata(mbdev->dev.parent);
+}
+
+static dma_addr_t
+mic_dma_map_page(struct device *dev, struct page *page,
+ unsigned long offset, size_t size, enum dma_data_direction dir,
+ struct dma_attrs *attrs)
+{
+ void *va = phys_to_virt(page_to_phys(page)) + offset;
+ struct mic_device *mdev = dev_get_drvdata(dev->parent);
+
+ return mic_map_single(mdev, va, size);
+}
+
+static void
+mic_dma_unmap_page(struct device *dev, dma_addr_t dma_addr,
+ size_t size, enum dma_data_direction dir,
+ struct dma_attrs *attrs)
+{
+ struct mic_device *mdev = dev_get_drvdata(dev->parent);
+ mic_unmap_single(mdev, dma_addr, size);
+}
+
+static struct dma_map_ops mic_dma_ops = {
+ .map_page = mic_dma_map_page,
+ .unmap_page = mic_dma_unmap_page,
+};
+
+static struct mic_irq *
+_mic_request_threaded_irq(struct mbus_device *mbdev,
+ irq_handler_t handler, irq_handler_t thread_fn,
+ const char *name, void *data, int intr_src)
+{
+ return mic_request_threaded_irq(mbdev_to_mdev(mbdev), handler,
+ thread_fn, name, data,
+ intr_src, MIC_INTR_DMA);
+}
+
+static void _mic_free_irq(struct mbus_device *mbdev,
+ struct mic_irq *cookie, void *data)
+{
+ return mic_free_irq(mbdev_to_mdev(mbdev), cookie, data);
+}
+
+static void _mic_ack_interrupt(struct mbus_device *mbdev, int num)
+{
+ struct mic_device *mdev = mbdev_to_mdev(mbdev);
+ mdev->ops->intr_workarounds(mdev);
+}
+
+static struct mbus_hw_ops mbus_hw_ops = {
+ .request_threaded_irq = _mic_request_threaded_irq,
+ .free_irq = _mic_free_irq,
+ .ack_interrupt = _mic_ack_interrupt,
+};
+
/**
* mic_reset - Reset the MIC device.
* @mdev: pointer to mic_device instance
@@ -95,9 +154,21 @@ retry:
*/
goto retry;
}
+ mdev->dma_mbdev = mbus_register_device(mdev->sdev->parent,
+ MBUS_DEV_DMA_HOST, &mic_dma_ops,
+ &mbus_hw_ops, mdev->mmio.va);
+ if (IS_ERR(mdev->dma_mbdev)) {
+ rc = PTR_ERR(mdev->dma_mbdev);
+ goto unlock_ret;
+ }
+ mdev->dma_ch = mic_request_dma_chan(mdev);
+ if (!mdev->dma_ch) {
+ rc = -ENXIO;
+ goto dma_remove;
+ }
rc = mdev->ops->load_mic_fw(mdev, buf);
if (rc)
- goto unlock_ret;
+ goto dma_release;
mic_smpt_restore(mdev);
mic_intr_restore(mdev);
mdev->intr_ops->enable_interrupts(mdev);
@@ -105,6 +176,11 @@ retry:
mdev->ops->write_spad(mdev, MIC_DPHI_SPAD, mdev->dp_dma_addr >> 32);
mdev->ops->send_firmware_intr(mdev);
mic_set_state(mdev, MIC_ONLINE);
+ goto unlock_ret;
+dma_release:
+ dma_release_channel(mdev->dma_ch);
+dma_remove:
+ mbus_unregister_device(mdev->dma_mbdev);
unlock_ret:
mutex_unlock(&mdev->mic_mutex);
return rc;
@@ -122,6 +198,11 @@ void mic_stop(struct mic_device *mdev, bool force)
mutex_lock(&mdev->mic_mutex);
if (MIC_OFFLINE != mdev->state || force) {
mic_virtio_reset_devices(mdev);
+ if (mdev->dma_ch) {
+ dma_release_channel(mdev->dma_ch);
+ mdev->dma_ch = NULL;
+ }
+ mbus_unregister_device(mdev->dma_mbdev);
mic_bootparam_init(mdev);
mic_reset(mdev);
if (MIC_RESET_FAILED == mdev->state)
diff --git a/drivers/misc/mic/host/mic_device.h b/drivers/misc/mic/host/mic_device.h
index 0398c696d257..016bd15a7bd1 100644
--- a/drivers/misc/mic/host/mic_device.h
+++ b/drivers/misc/mic/host/mic_device.h
@@ -25,6 +25,8 @@
#include <linux/idr.h>
#include <linux/notifier.h>
#include <linux/irqreturn.h>
+#include <linux/dmaengine.h>
+#include <linux/mic_bus.h>
#include "mic_intr.h"
@@ -87,6 +89,8 @@ enum mic_stepping {
* @cdev: Character device for MIC.
* @vdev_list: list of virtio devices.
* @pm_notifier: Handles PM notifications from the OS.
+ * @dma_mbdev: MIC BUS DMA device.
+ * @dma_ch: DMA channel reserved by this driver for use by virtio devices.
*/
struct mic_device {
struct mic_mw mmio;
@@ -124,6 +128,8 @@ struct mic_device {
struct cdev cdev;
struct list_head vdev_list;
struct notifier_block pm_notifier;
+ struct mbus_device *dma_mbdev;
+ struct dma_chan *dma_ch;
};
/**
@@ -144,6 +150,7 @@ struct mic_device {
* @load_mic_fw: Load firmware segments required to boot the card
* into card memory. This includes the kernel, command line, ramdisk etc.
* @get_postcode: Get post code status from firmware.
+ * @dma_filter: DMA filter function to be used.
*/
struct mic_hw_ops {
u8 aper_bar;
@@ -159,6 +166,7 @@ struct mic_hw_ops {
void (*send_firmware_intr)(struct mic_device *mdev);
int (*load_mic_fw)(struct mic_device *mdev, const char *buf);
u32 (*get_postcode)(struct mic_device *mdev);
+ bool (*dma_filter)(struct dma_chan *chan, void *param);
};
/**
@@ -187,6 +195,22 @@ mic_mmio_write(struct mic_mw *mw, u32 val, u32 offset)
iowrite32(val, mw->va + offset);
}
+static inline struct dma_chan *mic_request_dma_chan(struct mic_device *mdev)
+{
+ dma_cap_mask_t mask;
+ struct dma_chan *chan;
+
+ dma_cap_zero(mask);
+ dma_cap_set(DMA_MEMCPY, mask);
+ chan = dma_request_channel(mask, mdev->ops->dma_filter,
+ mdev->sdev->parent);
+ if (chan)
+ return chan;
+ dev_err(mdev->sdev->parent, "%s %d unable to acquire channel\n",
+ __func__, __LINE__);
+ return NULL;
+}
+
void mic_sysfs_init(struct mic_device *mdev);
int mic_start(struct mic_device *mdev, const char *buf);
void mic_stop(struct mic_device *mdev, bool force);
diff --git a/drivers/misc/mic/host/mic_intr.c b/drivers/misc/mic/host/mic_intr.c
index dbc5afde1392..d686f2846ac7 100644
--- a/drivers/misc/mic/host/mic_intr.c
+++ b/drivers/misc/mic/host/mic_intr.c
@@ -24,28 +24,29 @@
#include "../common/mic_dev.h"
#include "mic_device.h"
-/*
- * mic_invoke_callback - Invoke callback functions registered for
- * the corresponding source id.
- *
- * @mdev: pointer to the mic_device instance
- * @idx: The interrupt source id.
- *
- * Returns none.
- */
-static inline void mic_invoke_callback(struct mic_device *mdev, int idx)
+static irqreturn_t mic_thread_fn(int irq, void *dev)
{
+ struct mic_device *mdev = dev;
+ struct mic_intr_info *intr_info = mdev->intr_info;
+ struct mic_irq_info *irq_info = &mdev->irq_info;
struct mic_intr_cb *intr_cb;
struct pci_dev *pdev = container_of(mdev->sdev->parent,
- struct pci_dev, dev);
+ struct pci_dev, dev);
+ int i;
- spin_lock(&mdev->irq_info.mic_intr_lock);
- list_for_each_entry(intr_cb, &mdev->irq_info.cb_list[idx], list)
- if (intr_cb->func)
- intr_cb->func(pdev->irq, intr_cb->data);
- spin_unlock(&mdev->irq_info.mic_intr_lock);
+ spin_lock(&irq_info->mic_thread_lock);
+ for (i = intr_info->intr_start_idx[MIC_INTR_DB];
+ i < intr_info->intr_len[MIC_INTR_DB]; i++)
+ if (test_and_clear_bit(i, &irq_info->mask)) {
+ list_for_each_entry(intr_cb, &irq_info->cb_list[i],
+ list)
+ if (intr_cb->thread_fn)
+ intr_cb->thread_fn(pdev->irq,
+ intr_cb->data);
+ }
+ spin_unlock(&irq_info->mic_thread_lock);
+ return IRQ_HANDLED;
}
-
/**
* mic_interrupt - Generic interrupt handler for
* MSI and INTx based interrupts.
@@ -53,7 +54,11 @@ static inline void mic_invoke_callback(struct mic_device *mdev, int idx)
static irqreturn_t mic_interrupt(int irq, void *dev)
{
struct mic_device *mdev = dev;
- struct mic_intr_info *info = mdev->intr_info;
+ struct mic_intr_info *intr_info = mdev->intr_info;
+ struct mic_irq_info *irq_info = &mdev->irq_info;
+ struct mic_intr_cb *intr_cb;
+ struct pci_dev *pdev = container_of(mdev->sdev->parent,
+ struct pci_dev, dev);
u32 mask;
int i;
@@ -61,12 +66,19 @@ static irqreturn_t mic_interrupt(int irq, void *dev)
if (!mask)
return IRQ_NONE;
- for (i = info->intr_start_idx[MIC_INTR_DB];
- i < info->intr_len[MIC_INTR_DB]; i++)
- if (mask & BIT(i))
- mic_invoke_callback(mdev, i);
-
- return IRQ_HANDLED;
+ spin_lock(&irq_info->mic_intr_lock);
+ for (i = intr_info->intr_start_idx[MIC_INTR_DB];
+ i < intr_info->intr_len[MIC_INTR_DB]; i++)
+ if (mask & BIT(i)) {
+ list_for_each_entry(intr_cb, &irq_info->cb_list[i],
+ list)
+ if (intr_cb->handler)
+ intr_cb->handler(pdev->irq,
+ intr_cb->data);
+ set_bit(i, &irq_info->mask);
+ }
+ spin_unlock(&irq_info->mic_intr_lock);
+ return IRQ_WAKE_THREAD;
}
/* Return the interrupt offset from the index. Index is 0 based. */
@@ -99,14 +111,15 @@ static struct msix_entry *mic_get_available_vector(struct mic_device *mdev)
*
* @mdev: pointer to the mic_device instance
* @idx: The source id to be registered.
- * @func: The function to be called when the source id receives
+ * @handler: The function to be called when the source id receives
* the interrupt.
+ * @thread_fn: thread fn. corresponding to the handler
* @data: Private data of the requester.
* Return the callback structure that was registered or an
* appropriate error on failure.
*/
static struct mic_intr_cb *mic_register_intr_callback(struct mic_device *mdev,
- u8 idx, irqreturn_t (*func) (int irq, void *dev),
+ u8 idx, irq_handler_t handler, irq_handler_t thread_fn,
void *data)
{
struct mic_intr_cb *intr_cb;
@@ -117,7 +130,8 @@ static struct mic_intr_cb *mic_register_intr_callback(struct mic_device *mdev,
if (!intr_cb)
return ERR_PTR(-ENOMEM);
- intr_cb->func = func;
+ intr_cb->handler = handler;
+ intr_cb->thread_fn = thread_fn;
intr_cb->data = data;
intr_cb->cb_id = ida_simple_get(&mdev->irq_info.cb_ida,
0, 0, GFP_KERNEL);
@@ -126,9 +140,11 @@ static struct mic_intr_cb *mic_register_intr_callback(struct mic_device *mdev,
goto ida_fail;
}
+ spin_lock(&mdev->irq_info.mic_thread_lock);
spin_lock_irqsave(&mdev->irq_info.mic_intr_lock, flags);
list_add_tail(&intr_cb->list, &mdev->irq_info.cb_list[idx]);
spin_unlock_irqrestore(&mdev->irq_info.mic_intr_lock, flags);
+ spin_unlock(&mdev->irq_info.mic_thread_lock);
return intr_cb;
ida_fail:
@@ -152,8 +168,9 @@ static u8 mic_unregister_intr_callback(struct mic_device *mdev, u32 idx)
unsigned long flags;
int i;
+ spin_lock(&mdev->irq_info.mic_thread_lock);
+ spin_lock_irqsave(&mdev->irq_info.mic_intr_lock, flags);
for (i = 0; i < MIC_NUM_OFFSETS; i++) {
- spin_lock_irqsave(&mdev->irq_info.mic_intr_lock, flags);
list_for_each_safe(pos, tmp, &mdev->irq_info.cb_list[i]) {
intr_cb = list_entry(pos, struct mic_intr_cb, list);
if (intr_cb->cb_id == idx) {
@@ -163,11 +180,13 @@ static u8 mic_unregister_intr_callback(struct mic_device *mdev, u32 idx)
kfree(intr_cb);
spin_unlock_irqrestore(
&mdev->irq_info.mic_intr_lock, flags);
+ spin_unlock(&mdev->irq_info.mic_thread_lock);
return i;
}
}
- spin_unlock_irqrestore(&mdev->irq_info.mic_intr_lock, flags);
}
+ spin_unlock_irqrestore(&mdev->irq_info.mic_intr_lock, flags);
+ spin_unlock(&mdev->irq_info.mic_thread_lock);
return MIC_NUM_OFFSETS;
}
@@ -242,6 +261,7 @@ static int mic_setup_callbacks(struct mic_device *mdev)
INIT_LIST_HEAD(&mdev->irq_info.cb_list[i]);
ida_init(&mdev->irq_info.cb_ida);
spin_lock_init(&mdev->irq_info.mic_intr_lock);
+ spin_lock_init(&mdev->irq_info.mic_thread_lock);
return 0;
}
@@ -258,14 +278,12 @@ static void mic_release_callbacks(struct mic_device *mdev)
struct mic_intr_cb *intr_cb;
int i;
+ spin_lock(&mdev->irq_info.mic_thread_lock);
+ spin_lock_irqsave(&mdev->irq_info.mic_intr_lock, flags);
for (i = 0; i < MIC_NUM_OFFSETS; i++) {
- spin_lock_irqsave(&mdev->irq_info.mic_intr_lock, flags);
- if (list_empty(&mdev->irq_info.cb_list[i])) {
- spin_unlock_irqrestore(&mdev->irq_info.mic_intr_lock,
- flags);
+ if (list_empty(&mdev->irq_info.cb_list[i]))
break;
- }
list_for_each_safe(pos, tmp, &mdev->irq_info.cb_list[i]) {
intr_cb = list_entry(pos, struct mic_intr_cb, list);
@@ -274,8 +292,9 @@ static void mic_release_callbacks(struct mic_device *mdev)
intr_cb->cb_id);
kfree(intr_cb);
}
- spin_unlock_irqrestore(&mdev->irq_info.mic_intr_lock, flags);
}
+ spin_unlock_irqrestore(&mdev->irq_info.mic_intr_lock, flags);
+ spin_unlock(&mdev->irq_info.mic_thread_lock);
ida_destroy(&mdev->irq_info.cb_ida);
kfree(mdev->irq_info.cb_list);
}
@@ -313,7 +332,8 @@ static int mic_setup_msi(struct mic_device *mdev, struct pci_dev *pdev)
goto err_nomem2;
}
- rc = request_irq(pdev->irq, mic_interrupt, 0 , "mic-msi", mdev);
+ rc = request_threaded_irq(pdev->irq, mic_interrupt, mic_thread_fn,
+ 0, "mic-msi", mdev);
if (rc) {
dev_err(&pdev->dev, "Error allocating MSI interrupt\n");
goto err_irq_req_fail;
@@ -353,8 +373,8 @@ static int mic_setup_intx(struct mic_device *mdev, struct pci_dev *pdev)
goto err_nomem;
}
- rc = request_irq(pdev->irq, mic_interrupt,
- IRQF_SHARED, "mic-intx", mdev);
+ rc = request_threaded_irq(pdev->irq, mic_interrupt, mic_thread_fn,
+ IRQF_SHARED, "mic-intx", mdev);
if (rc)
goto err;
@@ -391,13 +411,14 @@ int mic_next_db(struct mic_device *mdev)
#define MK_COOKIE(x, y) ((x) | (y) << COOKIE_ID_SHIFT)
/**
- * mic_request_irq - request an irq. mic_mutex needs
+ * mic_request_threaded_irq - request an irq. mic_mutex needs
* to be held before calling this function.
*
* @mdev: pointer to mic_device instance
- * @func: The callback function that handles the interrupt.
+ * @handler: The callback function that handles the interrupt.
* The function needs to call ack_interrupts
* (mdev->ops->ack_interrupt(mdev)) when handling the interrupts.
+ * @thread_fn: thread fn required by request_threaded_irq.
* @name: The ASCII name of the callee requesting the irq.
* @data: private data that is returned back when calling the
* function handler.
@@ -412,10 +433,11 @@ int mic_next_db(struct mic_device *mdev)
* error code.
*
*/
-struct mic_irq *mic_request_irq(struct mic_device *mdev,
- irqreturn_t (*func)(int irq, void *dev),
- const char *name, void *data, int intr_src,
- enum mic_intr_type type)
+struct mic_irq *
+mic_request_threaded_irq(struct mic_device *mdev,
+ irq_handler_t handler, irq_handler_t thread_fn,
+ const char *name, void *data, int intr_src,
+ enum mic_intr_type type)
{
u16 offset;
int rc = 0;
@@ -444,7 +466,8 @@ struct mic_irq *mic_request_irq(struct mic_device *mdev,
goto err;
}
- rc = request_irq(msix->vector, func, 0, name, data);
+ rc = request_threaded_irq(msix->vector, handler, thread_fn,
+ 0, name, data);
if (rc) {
dev_dbg(mdev->sdev->parent,
"request irq failed rc = %d\n", rc);
@@ -458,8 +481,8 @@ struct mic_irq *mic_request_irq(struct mic_device *mdev,
dev_dbg(mdev->sdev->parent, "irq: %d assigned for src: %d\n",
msix->vector, intr_src);
} else {
- intr_cb = mic_register_intr_callback(mdev,
- offset, func, data);
+ intr_cb = mic_register_intr_callback(mdev, offset, handler,
+ thread_fn, data);
if (IS_ERR(intr_cb)) {
dev_err(mdev->sdev->parent,
"No available callback entries for use\n");
@@ -487,9 +510,9 @@ err:
* needs to be held before calling this function.
*
* @mdev: pointer to mic_device instance
- * @cookie: cookie obtained during a successful call to mic_request_irq
+ * @cookie: cookie obtained during a successful call to mic_request_threaded_irq
* @data: private data specified by the calling function during the
- * mic_request_irq
+ * mic_request_threaded_irq
*
* returns: none.
*/
diff --git a/drivers/misc/mic/host/mic_intr.h b/drivers/misc/mic/host/mic_intr.h
index 6091aa97e116..9f783d4ad7f1 100644
--- a/drivers/misc/mic/host/mic_intr.h
+++ b/drivers/misc/mic/host/mic_intr.h
@@ -21,12 +21,15 @@
#ifndef _MIC_INTR_H_
#define _MIC_INTR_H_
+#include <linux/bitops.h>
+#include <linux/interrupt.h>
/*
* The minimum number of msix vectors required for normal operation.
* 3 for virtio network, console and block devices.
* 1 for card shutdown notifications.
+ * 4 for host owned DMA channels.
*/
-#define MIC_MIN_MSIX 4
+#define MIC_MIN_MSIX 8
#define MIC_NUM_OFFSETS 32
/**
@@ -68,7 +71,11 @@ struct mic_intr_info {
* @num_vectors: The number of MSI/MSI-x vectors that have been allocated.
* @cb_ida: callback ID allocator to track the callbacks registered.
* @mic_intr_lock: spinlock to protect the interrupt callback list.
+ * @mic_thread_lock: spinlock to protect the thread callback list.
+ * This lock is used to protect against thread_fn while
+ * mic_intr_lock is used to protect against interrupt handler.
* @cb_list: Array of callback lists one for each source.
+ * @mask: Mask used by the main thread fn to call the underlying thread fns.
*/
struct mic_irq_info {
int next_avail_src;
@@ -77,19 +84,23 @@ struct mic_irq_info {
u16 num_vectors;
struct ida cb_ida;
spinlock_t mic_intr_lock;
+ spinlock_t mic_thread_lock;
struct list_head *cb_list;
+ unsigned long mask;
};
/**
* struct mic_intr_cb - Interrupt callback structure.
*
- * @func: The callback function
+ * @handler: The callback function
+ * @thread_fn: The thread_fn.
* @data: Private data of the requester.
* @cb_id: The callback id. Identifies this callback.
* @list: list head pointing to the next callback structure.
*/
struct mic_intr_cb {
- irqreturn_t (*func) (int irq, void *data);
+ irq_handler_t handler;
+ irq_handler_t thread_fn;
void *data;
int cb_id;
struct list_head list;
@@ -124,11 +135,11 @@ struct mic_hw_intr_ops {
};
int mic_next_db(struct mic_device *mdev);
-struct mic_irq *mic_request_irq(struct mic_device *mdev,
- irqreturn_t (*func)(int irq, void *data),
- const char *name, void *data, int intr_src,
- enum mic_intr_type type);
-
+struct mic_irq *
+mic_request_threaded_irq(struct mic_device *mdev,
+ irq_handler_t handler, irq_handler_t thread_fn,
+ const char *name, void *data, int intr_src,
+ enum mic_intr_type type);
void mic_free_irq(struct mic_device *mdev,
struct mic_irq *cookie, void *data);
int mic_setup_interrupts(struct mic_device *mdev, struct pci_dev *pdev);
diff --git a/drivers/misc/mic/host/mic_main.c b/drivers/misc/mic/host/mic_main.c
index c04a021e20c7..ab37a3117d23 100644
--- a/drivers/misc/mic/host/mic_main.c
+++ b/drivers/misc/mic/host/mic_main.c
@@ -38,7 +38,7 @@
static const char mic_driver_name[] = "mic";
-static DEFINE_PCI_DEVICE_TABLE(mic_pci_tbl) = {
+static const struct pci_device_id mic_pci_tbl[] = {
{PCI_DEVICE(PCI_VENDOR_ID_INTEL, MIC_X100_PCI_DEVICE_2250)},
{PCI_DEVICE(PCI_VENDOR_ID_INTEL, MIC_X100_PCI_DEVICE_2251)},
{PCI_DEVICE(PCI_VENDOR_ID_INTEL, MIC_X100_PCI_DEVICE_2252)},
@@ -389,8 +389,9 @@ static int mic_probe(struct pci_dev *pdev,
mutex_lock(&mdev->mic_mutex);
mdev->shutdown_db = mic_next_db(mdev);
- mdev->shutdown_cookie = mic_request_irq(mdev, mic_shutdown_db,
- "shutdown-interrupt", mdev, mdev->shutdown_db, MIC_INTR_DB);
+ mdev->shutdown_cookie = mic_request_threaded_irq(mdev, mic_shutdown_db,
+ NULL, "shutdown-interrupt", mdev,
+ mdev->shutdown_db, MIC_INTR_DB);
if (IS_ERR(mdev->shutdown_cookie)) {
rc = PTR_ERR(mdev->shutdown_cookie);
mutex_unlock(&mdev->mic_mutex);
diff --git a/drivers/misc/mic/host/mic_virtio.c b/drivers/misc/mic/host/mic_virtio.c
index 7e1ef0ebbb80..a020e4eb435a 100644
--- a/drivers/misc/mic/host/mic_virtio.c
+++ b/drivers/misc/mic/host/mic_virtio.c
@@ -21,60 +21,157 @@
#include <linux/pci.h>
#include <linux/sched.h>
#include <linux/uaccess.h>
-
+#include <linux/dmaengine.h>
#include <linux/mic_common.h>
+
#include "../common/mic_dev.h"
#include "mic_device.h"
#include "mic_smpt.h"
#include "mic_virtio.h"
/*
- * Initiates the copies across the PCIe bus from card memory to
- * a user space buffer.
+ * Size of the internal buffer used during DMA's as an intermediate buffer
+ * for copy to/from user.
*/
-static int mic_virtio_copy_to_user(struct mic_vdev *mvdev,
- void __user *ubuf, size_t len, u64 addr)
+#define MIC_INT_DMA_BUF_SIZE PAGE_ALIGN(64 * 1024ULL)
+
+static int mic_sync_dma(struct mic_device *mdev, dma_addr_t dst,
+ dma_addr_t src, size_t len)
{
- int err;
- void __iomem *dbuf = mvdev->mdev->aper.va + addr;
- /*
- * We are copying from IO below an should ideally use something
- * like copy_to_user_fromio(..) if it existed.
- */
- if (copy_to_user(ubuf, (void __force *)dbuf, len)) {
- err = -EFAULT;
- dev_err(mic_dev(mvdev), "%s %d err %d\n",
+ int err = 0;
+ struct dma_async_tx_descriptor *tx;
+ struct dma_chan *mic_ch = mdev->dma_ch;
+
+ if (!mic_ch) {
+ err = -EBUSY;
+ goto error;
+ }
+
+ tx = mic_ch->device->device_prep_dma_memcpy(mic_ch, dst, src, len,
+ DMA_PREP_FENCE);
+ if (!tx) {
+ err = -ENOMEM;
+ goto error;
+ } else {
+ dma_cookie_t cookie = tx->tx_submit(tx);
+
+ err = dma_submit_error(cookie);
+ if (err)
+ goto error;
+ err = dma_sync_wait(mic_ch, cookie);
+ }
+error:
+ if (err)
+ dev_err(mdev->sdev->parent, "%s %d err %d\n",
__func__, __LINE__, err);
- goto err;
+ return err;
+}
+
+/*
+ * Initiates the copies across the PCIe bus from card memory to a user
+ * space buffer. When transfers are done using DMA, source/destination
+ * addresses and transfer length must follow the alignment requirements of
+ * the MIC DMA engine.
+ */
+static int mic_virtio_copy_to_user(struct mic_vdev *mvdev, void __user *ubuf,
+ size_t len, u64 daddr, size_t dlen,
+ int vr_idx)
+{
+ struct mic_device *mdev = mvdev->mdev;
+ void __iomem *dbuf = mdev->aper.va + daddr;
+ struct mic_vringh *mvr = &mvdev->mvr[vr_idx];
+ size_t dma_alignment = 1 << mdev->dma_ch->device->copy_align;
+ size_t dma_offset;
+ size_t partlen;
+ int err;
+
+ dma_offset = daddr - round_down(daddr, dma_alignment);
+ daddr -= dma_offset;
+ len += dma_offset;
+
+ while (len) {
+ partlen = min_t(size_t, len, MIC_INT_DMA_BUF_SIZE);
+
+ err = mic_sync_dma(mdev, mvr->buf_da, daddr,
+ ALIGN(partlen, dma_alignment));
+ if (err)
+ goto err;
+
+ if (copy_to_user(ubuf, mvr->buf + dma_offset,
+ partlen - dma_offset)) {
+ err = -EFAULT;
+ goto err;
+ }
+ daddr += partlen;
+ ubuf += partlen;
+ dbuf += partlen;
+ mvdev->in_bytes_dma += partlen;
+ mvdev->in_bytes += partlen;
+ len -= partlen;
+ dma_offset = 0;
}
- mvdev->in_bytes += len;
- err = 0;
+ return 0;
err:
+ dev_err(mic_dev(mvdev), "%s %d err %d\n", __func__, __LINE__, err);
return err;
}
/*
- * Initiates copies across the PCIe bus from a user space
- * buffer to card memory.
+ * Initiates copies across the PCIe bus from a user space buffer to card
+ * memory. When transfers are done using DMA, source/destination addresses
+ * and transfer length must follow the alignment requirements of the MIC
+ * DMA engine.
*/
-static int mic_virtio_copy_from_user(struct mic_vdev *mvdev,
- void __user *ubuf, size_t len, u64 addr)
+static int mic_virtio_copy_from_user(struct mic_vdev *mvdev, void __user *ubuf,
+ size_t len, u64 daddr, size_t dlen,
+ int vr_idx)
{
+ struct mic_device *mdev = mvdev->mdev;
+ void __iomem *dbuf = mdev->aper.va + daddr;
+ struct mic_vringh *mvr = &mvdev->mvr[vr_idx];
+ size_t dma_alignment = 1 << mdev->dma_ch->device->copy_align;
+ size_t partlen;
int err;
- void __iomem *dbuf = mvdev->mdev->aper.va + addr;
+
+ if (daddr & (dma_alignment - 1)) {
+ mvdev->tx_dst_unaligned += len;
+ goto memcpy;
+ } else if (ALIGN(len, dma_alignment) > dlen) {
+ mvdev->tx_len_unaligned += len;
+ goto memcpy;
+ }
+
+ while (len) {
+ partlen = min_t(size_t, len, MIC_INT_DMA_BUF_SIZE);
+
+ if (copy_from_user(mvr->buf, ubuf, partlen)) {
+ err = -EFAULT;
+ goto err;
+ }
+ err = mic_sync_dma(mdev, daddr, mvr->buf_da,
+ ALIGN(partlen, dma_alignment));
+ if (err)
+ goto err;
+ daddr += partlen;
+ ubuf += partlen;
+ dbuf += partlen;
+ mvdev->out_bytes_dma += partlen;
+ mvdev->out_bytes += partlen;
+ len -= partlen;
+ }
+memcpy:
/*
* We are copying to IO below and should ideally use something
* like copy_from_user_toio(..) if it existed.
*/
if (copy_from_user((void __force *)dbuf, ubuf, len)) {
err = -EFAULT;
- dev_err(mic_dev(mvdev), "%s %d err %d\n",
- __func__, __LINE__, err);
goto err;
}
mvdev->out_bytes += len;
- err = 0;
+ return 0;
err:
+ dev_err(mic_dev(mvdev), "%s %d err %d\n", __func__, __LINE__, err);
return err;
}
@@ -110,7 +207,8 @@ static inline u32 mic_vringh_iov_consumed(struct vringh_kiov *iov)
* way to override the VRINGH xfer(..) routines as of v3.10.
*/
static int mic_vringh_copy(struct mic_vdev *mvdev, struct vringh_kiov *iov,
- void __user *ubuf, size_t len, bool read, size_t *out_len)
+ void __user *ubuf, size_t len, bool read, int vr_idx,
+ size_t *out_len)
{
int ret = 0;
size_t partlen, tot_len = 0;
@@ -118,13 +216,15 @@ static int mic_vringh_copy(struct mic_vdev *mvdev, struct vringh_kiov *iov,
while (len && iov->i < iov->used) {
partlen = min(iov->iov[iov->i].iov_len, len);
if (read)
- ret = mic_virtio_copy_to_user(mvdev,
- ubuf, partlen,
- (u64)iov->iov[iov->i].iov_base);
+ ret = mic_virtio_copy_to_user(mvdev, ubuf, partlen,
+ (u64)iov->iov[iov->i].iov_base,
+ iov->iov[iov->i].iov_len,
+ vr_idx);
else
- ret = mic_virtio_copy_from_user(mvdev,
- ubuf, partlen,
- (u64)iov->iov[iov->i].iov_base);
+ ret = mic_virtio_copy_from_user(mvdev, ubuf, partlen,
+ (u64)iov->iov[iov->i].iov_base,
+ iov->iov[iov->i].iov_len,
+ vr_idx);
if (ret) {
dev_err(mic_dev(mvdev), "%s %d err %d\n",
__func__, __LINE__, ret);
@@ -192,8 +292,8 @@ static int _mic_virtio_copy(struct mic_vdev *mvdev,
ubuf = iov.iov_base;
}
/* Issue all the read descriptors first */
- ret = mic_vringh_copy(mvdev, riov, ubuf, len,
- MIC_VRINGH_READ, &out_len);
+ ret = mic_vringh_copy(mvdev, riov, ubuf, len, MIC_VRINGH_READ,
+ copy->vr_idx, &out_len);
if (ret) {
dev_err(mic_dev(mvdev), "%s %d err %d\n",
__func__, __LINE__, ret);
@@ -203,8 +303,8 @@ static int _mic_virtio_copy(struct mic_vdev *mvdev,
ubuf += out_len;
copy->out_len += out_len;
/* Issue the write descriptors next */
- ret = mic_vringh_copy(mvdev, wiov, ubuf, len,
- !MIC_VRINGH_READ, &out_len);
+ ret = mic_vringh_copy(mvdev, wiov, ubuf, len, !MIC_VRINGH_READ,
+ copy->vr_idx, &out_len);
if (ret) {
dev_err(mic_dev(mvdev), "%s %d err %d\n",
__func__, __LINE__, ret);
@@ -589,13 +689,19 @@ int mic_virtio_add_device(struct mic_vdev *mvdev,
dev_dbg(mdev->sdev->parent,
"%s %d index %d va %p info %p vr_size 0x%x\n",
__func__, __LINE__, i, vr->va, vr->info, vr_size);
+ mvr->buf = (void *)__get_free_pages(GFP_KERNEL,
+ get_order(MIC_INT_DMA_BUF_SIZE));
+ mvr->buf_da = mic_map_single(mvdev->mdev, mvr->buf,
+ MIC_INT_DMA_BUF_SIZE);
}
snprintf(irqname, sizeof(irqname), "mic%dvirtio%d", mdev->id,
mvdev->virtio_id);
mvdev->virtio_db = mic_next_db(mdev);
- mvdev->virtio_cookie = mic_request_irq(mdev, mic_virtio_intr_handler,
- irqname, mvdev, mvdev->virtio_db, MIC_INTR_DB);
+ mvdev->virtio_cookie = mic_request_threaded_irq(mdev,
+ mic_virtio_intr_handler,
+ NULL, irqname, mvdev,
+ mvdev->virtio_db, MIC_INTR_DB);
if (IS_ERR(mvdev->virtio_cookie)) {
ret = PTR_ERR(mvdev->virtio_cookie);
dev_dbg(mdev->sdev->parent, "request irq failed\n");
@@ -671,6 +777,11 @@ skip_hot_remove:
vqconfig = mic_vq_config(mvdev->dd);
for (i = 0; i < mvdev->dd->num_vq; i++) {
struct mic_vringh *mvr = &mvdev->mvr[i];
+
+ mic_unmap_single(mvdev->mdev, mvr->buf_da,
+ MIC_INT_DMA_BUF_SIZE);
+ free_pages((unsigned long)mvr->buf,
+ get_order(MIC_INT_DMA_BUF_SIZE));
vringh_kiov_cleanup(&mvr->riov);
vringh_kiov_cleanup(&mvr->wiov);
mic_unmap_single(mdev, le64_to_cpu(vqconfig[i].address),
diff --git a/drivers/misc/mic/host/mic_virtio.h b/drivers/misc/mic/host/mic_virtio.h
index 184f3c84805b..d574efb853d9 100644
--- a/drivers/misc/mic/host/mic_virtio.h
+++ b/drivers/misc/mic/host/mic_virtio.h
@@ -46,18 +46,23 @@
* @vrh: The host VRINGH used for accessing the card vrings.
* @riov: The VRINGH read kernel IOV.
* @wiov: The VRINGH write kernel IOV.
- * @head: The VRINGH head index address passed to vringh_getdesc_kern(..).
* @vr_mutex: Mutex for synchronizing access to the VRING.
+ * @buf: Temporary kernel buffer used to copy in/out data
+ * from/to the card via DMA.
+ * @buf_da: dma address of buf.
* @mvdev: Back pointer to MIC virtio device for vringh_notify(..).
+ * @head: The VRINGH head index address passed to vringh_getdesc_kern(..).
*/
struct mic_vringh {
struct mic_vring vring;
struct vringh vrh;
struct vringh_kiov riov;
struct vringh_kiov wiov;
- u16 head;
struct mutex vr_mutex;
+ void *buf;
+ dma_addr_t buf_da;
struct mic_vdev *mvdev;
+ u16 head;
};
/**
@@ -69,6 +74,14 @@ struct mic_vringh {
* @poll_wake - Used for waking up threads blocked in poll.
* @out_bytes - Debug stats for number of bytes copied from host to card.
* @in_bytes - Debug stats for number of bytes copied from card to host.
+ * @out_bytes_dma - Debug stats for number of bytes copied from host to card
+ * using DMA.
+ * @in_bytes_dma - Debug stats for number of bytes copied from card to host
+ * using DMA.
+ * @tx_len_unaligned - Debug stats for number of bytes copied to the card where
+ * the transfer length did not have the required DMA alignment.
+ * @tx_dst_unaligned - Debug stats for number of bytes copied where the
+ * destination address on the card did not have the required DMA alignment.
* @mvr - Store per VRING data structures.
* @virtio_bh_work - Work struct used to schedule virtio bottom half handling.
* @dd - Virtio device descriptor.
@@ -84,6 +97,10 @@ struct mic_vdev {
int poll_wake;
unsigned long out_bytes;
unsigned long in_bytes;
+ unsigned long out_bytes_dma;
+ unsigned long in_bytes_dma;
+ unsigned long tx_len_unaligned;
+ unsigned long tx_dst_unaligned;
struct mic_vringh mvr[MIC_MAX_VRINGS];
struct work_struct virtio_bh_work;
struct mic_device_desc *dd;
diff --git a/drivers/misc/mic/host/mic_x100.c b/drivers/misc/mic/host/mic_x100.c
index 5562fdd3ef4e..b7a21e11dcdf 100644
--- a/drivers/misc/mic/host/mic_x100.c
+++ b/drivers/misc/mic/host/mic_x100.c
@@ -549,6 +549,13 @@ struct mic_smpt_ops mic_x100_smpt_ops = {
.set = mic_x100_smpt_set,
};
+static bool mic_x100_dma_filter(struct dma_chan *chan, void *param)
+{
+ if (chan->device->dev->parent == (struct device *)param)
+ return true;
+ return false;
+}
+
struct mic_hw_ops mic_x100_ops = {
.aper_bar = MIC_X100_APER_BAR,
.mmio_bar = MIC_X100_MMIO_BAR,
@@ -563,6 +570,7 @@ struct mic_hw_ops mic_x100_ops = {
.send_firmware_intr = mic_x100_send_firmware_intr,
.load_mic_fw = mic_x100_load_firmware,
.get_postcode = mic_x100_get_postcode,
+ .dma_filter = mic_x100_dma_filter,
};
struct mic_hw_intr_ops mic_x100_intr_ops = {
diff --git a/drivers/misc/ti-st/st_kim.c b/drivers/misc/ti-st/st_kim.c
index 9d3dbb28734b..21c2337bad68 100644
--- a/drivers/misc/ti-st/st_kim.c
+++ b/drivers/misc/ti-st/st_kim.c
@@ -244,7 +244,8 @@ static long read_local_version(struct kim_data_s *kim_gdata, char *bts_scr_name)
if (version & 0x8000)
maj_ver |= 0x0008;
- sprintf(bts_scr_name, "TIInit_%d.%d.%d.bts", chip, maj_ver, min_ver);
+ sprintf(bts_scr_name, "ti-connectivity/TIInit_%d.%d.%d.bts",
+ chip, maj_ver, min_ver);
/* to be accessed later via sysfs entry */
kim_gdata->version.full = version;
@@ -287,7 +288,7 @@ static long download_firmware(struct kim_data_s *kim_gdata)
long len = 0;
unsigned char *ptr = NULL;
unsigned char *action_ptr = NULL;
- unsigned char bts_scr_name[30] = { 0 }; /* 30 char long bts scr name? */
+ unsigned char bts_scr_name[40] = { 0 }; /* 40 char long bts scr name? */
int wr_room_space;
int cmd_size;
unsigned long timeout;
@@ -778,7 +779,7 @@ static int kim_probe(struct platform_device *pdev)
pr_info("sysfs entries created\n");
kim_debugfs_dir = debugfs_create_dir("ti-st", NULL);
- if (IS_ERR(kim_debugfs_dir)) {
+ if (!kim_debugfs_dir) {
pr_err(" debugfs entries creation failed ");
err = -EIO;
goto err_debugfs_dir;
@@ -788,7 +789,6 @@ static int kim_probe(struct platform_device *pdev)
kim_gdata, &version_debugfs_fops);
debugfs_create_file("protocols", S_IRUGO, kim_debugfs_dir,
kim_gdata, &list_debugfs_fops);
- pr_info(" debugfs entries created ");
return 0;
err_debugfs_dir:
diff --git a/drivers/misc/vexpress-syscfg.c b/drivers/misc/vexpress-syscfg.c
index 3250fc1df0aa..b3a812384a6f 100644
--- a/drivers/misc/vexpress-syscfg.c
+++ b/drivers/misc/vexpress-syscfg.c
@@ -130,7 +130,7 @@ static int vexpress_syscfg_write(void *context, unsigned int index,
return vexpress_syscfg_exec(func, index, true, &val);
}
-struct regmap_config vexpress_syscfg_regmap_config = {
+static struct regmap_config vexpress_syscfg_regmap_config = {
.lock = vexpress_config_lock,
.unlock = vexpress_config_unlock,
.reg_bits = 32,
@@ -276,7 +276,7 @@ int vexpress_syscfg_device_register(struct platform_device *pdev)
}
-int vexpress_syscfg_probe(struct platform_device *pdev)
+static int vexpress_syscfg_probe(struct platform_device *pdev)
{
struct vexpress_syscfg *syscfg;
struct resource *res;
diff --git a/drivers/misc/vmw_vmci/vmci_guest.c b/drivers/misc/vmw_vmci/vmci_guest.c
index e0d5017785e5..248399a881af 100644
--- a/drivers/misc/vmw_vmci/vmci_guest.c
+++ b/drivers/misc/vmw_vmci/vmci_guest.c
@@ -748,7 +748,7 @@ static void vmci_guest_remove_device(struct pci_dev *pdev)
/* The rest are managed resources and will be freed by PCI core */
}
-static DEFINE_PCI_DEVICE_TABLE(vmci_ids) = {
+static const struct pci_device_id vmci_ids[] = {
{ PCI_DEVICE(PCI_VENDOR_ID_VMWARE, PCI_DEVICE_ID_VMWARE_VMCI), },
{ 0 },
};
diff --git a/drivers/pci/pci-driver.c b/drivers/pci/pci-driver.c
index 3f8e3dbcaa7c..d04c5adafc16 100644
--- a/drivers/pci/pci-driver.c
+++ b/drivers/pci/pci-driver.c
@@ -582,7 +582,7 @@ static int pci_legacy_suspend_late(struct device *dev, pm_message_t state)
WARN_ONCE(pci_dev->current_state != prev,
"PCI PM: Device state not saved by %pF\n",
drv->suspend_late);
- return 0;
+ goto Fixup;
}
}
@@ -591,6 +591,9 @@ static int pci_legacy_suspend_late(struct device *dev, pm_message_t state)
pci_pm_set_unknown_state(pci_dev);
+Fixup:
+ pci_fixup_device(pci_fixup_suspend_late, pci_dev);
+
return 0;
}
@@ -734,7 +737,7 @@ static int pci_pm_suspend_noirq(struct device *dev)
if (!pm) {
pci_save_state(pci_dev);
- return 0;
+ goto Fixup;
}
if (pm->suspend_noirq) {
@@ -751,7 +754,7 @@ static int pci_pm_suspend_noirq(struct device *dev)
WARN_ONCE(pci_dev->current_state != prev,
"PCI PM: State of device not saved by %pF\n",
pm->suspend_noirq);
- return 0;
+ goto Fixup;
}
}
@@ -775,6 +778,9 @@ static int pci_pm_suspend_noirq(struct device *dev)
if (pci_dev->class == PCI_CLASS_SERIAL_USB_EHCI)
pci_write_config_word(pci_dev, PCI_COMMAND, 0);
+Fixup:
+ pci_fixup_device(pci_fixup_suspend_late, pci_dev);
+
return 0;
}
@@ -999,8 +1005,10 @@ static int pci_pm_poweroff_noirq(struct device *dev)
if (pci_has_legacy_pm_support(to_pci_dev(dev)))
return pci_legacy_suspend_late(dev, PMSG_HIBERNATE);
- if (!drv || !drv->pm)
+ if (!drv || !drv->pm) {
+ pci_fixup_device(pci_fixup_suspend_late, pci_dev);
return 0;
+ }
if (drv->pm->poweroff_noirq) {
int error;
@@ -1021,6 +1029,8 @@ static int pci_pm_poweroff_noirq(struct device *dev)
if (pci_dev->class == PCI_CLASS_SERIAL_USB_EHCI)
pci_write_config_word(pci_dev, PCI_COMMAND, 0);
+ pci_fixup_device(pci_fixup_suspend_late, pci_dev);
+
if (pcibios_pm_ops.poweroff_noirq)
return pcibios_pm_ops.poweroff_noirq(dev);
diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
index ad566827b547..80c2d014283d 100644
--- a/drivers/pci/quirks.c
+++ b/drivers/pci/quirks.c
@@ -2986,6 +2986,103 @@ DECLARE_PCI_FIXUP_HEADER(0x1814, 0x0601, /* Ralink RT2800 802.11n PCI */
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_REALTEK, 0x8169,
quirk_broken_intx_masking);
+#ifdef CONFIG_ACPI
+/*
+ * Apple: Shutdown Cactus Ridge Thunderbolt controller.
+ *
+ * On Apple hardware the Cactus Ridge Thunderbolt controller needs to be
+ * shutdown before suspend. Otherwise the native host interface (NHI) will not
+ * be present after resume if a device was plugged in before suspend.
+ *
+ * The thunderbolt controller consists of a pcie switch with downstream
+ * bridges leading to the NHI and to the tunnel pci bridges.
+ *
+ * This quirk cuts power to the whole chip. Therefore we have to apply it
+ * during suspend_noirq of the upstream bridge.
+ *
+ * Power is automagically restored before resume. No action is needed.
+ */
+static void quirk_apple_poweroff_thunderbolt(struct pci_dev *dev)
+{
+ acpi_handle bridge, SXIO, SXFP, SXLV;
+
+ if (!dmi_match(DMI_BOARD_VENDOR, "Apple Inc."))
+ return;
+ if (pci_pcie_type(dev) != PCI_EXP_TYPE_UPSTREAM)
+ return;
+ bridge = ACPI_HANDLE(&dev->dev);
+ if (!bridge)
+ return;
+ /*
+ * SXIO and SXLV are present only on machines requiring this quirk.
+ * TB bridges in external devices might have the same device id as those
+ * on the host, but they will not have the associated ACPI methods. This
+ * implicitly checks that we are at the right bridge.
+ */
+ if (ACPI_FAILURE(acpi_get_handle(bridge, "DSB0.NHI0.SXIO", &SXIO))
+ || ACPI_FAILURE(acpi_get_handle(bridge, "DSB0.NHI0.SXFP", &SXFP))
+ || ACPI_FAILURE(acpi_get_handle(bridge, "DSB0.NHI0.SXLV", &SXLV)))
+ return;
+ dev_info(&dev->dev, "quirk: cutting power to thunderbolt controller...\n");
+
+ /* magic sequence */
+ acpi_execute_simple_method(SXIO, NULL, 1);
+ acpi_execute_simple_method(SXFP, NULL, 0);
+ msleep(300);
+ acpi_execute_simple_method(SXLV, NULL, 0);
+ acpi_execute_simple_method(SXIO, NULL, 0);
+ acpi_execute_simple_method(SXLV, NULL, 0);
+}
+DECLARE_PCI_FIXUP_SUSPEND_LATE(PCI_VENDOR_ID_INTEL, 0x1547,
+ quirk_apple_poweroff_thunderbolt);
+
+/*
+ * Apple: Wait for the thunderbolt controller to reestablish pci tunnels.
+ *
+ * During suspend the thunderbolt controller is reset and all pci
+ * tunnels are lost. The NHI driver will try to reestablish all tunnels
+ * during resume. We have to manually wait for the NHI since there is
+ * no parent child relationship between the NHI and the tunneled
+ * bridges.
+ */
+static void quirk_apple_wait_for_thunderbolt(struct pci_dev *dev)
+{
+ struct pci_dev *sibling = NULL;
+ struct pci_dev *nhi = NULL;
+
+ if (!dmi_match(DMI_BOARD_VENDOR, "Apple Inc."))
+ return;
+ if (pci_pcie_type(dev) != PCI_EXP_TYPE_DOWNSTREAM)
+ return;
+ /*
+ * Find the NHI and confirm that we are a bridge on the tb host
+ * controller and not on a tb endpoint.
+ */
+ sibling = pci_get_slot(dev->bus, 0x0);
+ if (sibling == dev)
+ goto out; /* we are the downstream bridge to the NHI */
+ if (!sibling || !sibling->subordinate)
+ goto out;
+ nhi = pci_get_slot(sibling->subordinate, 0x0);
+ if (!nhi)
+ goto out;
+ if (nhi->vendor != PCI_VENDOR_ID_INTEL
+ || (nhi->device != 0x1547 && nhi->device != 0x156c)
+ || nhi->subsystem_vendor != 0x2222
+ || nhi->subsystem_device != 0x1111)
+ goto out;
+ dev_info(&dev->dev, "quirk: wating for thunderbolt to reestablish pci tunnels...\n");
+ device_pm_wait_for_dev(&dev->dev, &nhi->dev);
+out:
+ pci_dev_put(nhi);
+ pci_dev_put(sibling);
+}
+DECLARE_PCI_FIXUP_RESUME_EARLY(PCI_VENDOR_ID_INTEL, 0x1547,
+ quirk_apple_wait_for_thunderbolt);
+DECLARE_PCI_FIXUP_RESUME_EARLY(PCI_VENDOR_ID_INTEL, 0x156d,
+ quirk_apple_wait_for_thunderbolt);
+#endif
+
static void pci_do_fixups(struct pci_dev *dev, struct pci_fixup *f,
struct pci_fixup *end)
{
@@ -3018,6 +3115,8 @@ extern struct pci_fixup __start_pci_fixups_resume_early[];
extern struct pci_fixup __end_pci_fixups_resume_early[];
extern struct pci_fixup __start_pci_fixups_suspend[];
extern struct pci_fixup __end_pci_fixups_suspend[];
+extern struct pci_fixup __start_pci_fixups_suspend_late[];
+extern struct pci_fixup __end_pci_fixups_suspend_late[];
static bool pci_apply_fixup_final_quirks;
@@ -3063,6 +3162,11 @@ void pci_fixup_device(enum pci_fixup_pass pass, struct pci_dev *dev)
end = __end_pci_fixups_suspend;
break;
+ case pci_fixup_suspend_late:
+ start = __start_pci_fixups_suspend_late;
+ end = __end_pci_fixups_suspend_late;
+ break;
+
default:
/* stupid compiler warning, you would think with an enum... */
return;
diff --git a/drivers/pcmcia/Kconfig b/drivers/pcmcia/Kconfig
index 0c657d6af03d..51cf8083b299 100644
--- a/drivers/pcmcia/Kconfig
+++ b/drivers/pcmcia/Kconfig
@@ -202,6 +202,7 @@ config PCMCIA_SA1111
depends on ARM && SA1111 && PCMCIA
select PCMCIA_SOC_COMMON
select PCMCIA_SA11XX_BASE if ARCH_SA1100
+ select PCMCIA_PXA2XX if ARCH_LUBBOCK && SA1111
help
Say Y here to include support for SA1111-based PCMCIA or CF
sockets, found on the Jornada 720, Graphicsmaster and other
@@ -217,7 +218,6 @@ config PCMCIA_PXA2XX
|| ARCOM_PCMCIA || ARCH_PXA_ESERIES || MACH_STARGATE2 \
|| MACH_VPAC270 || MACH_BALLOON3 || MACH_COLIBRI \
|| MACH_COLIBRI320 || MACH_H4700)
- select PCMCIA_SA1111 if ARCH_LUBBOCK && SA1111
select PCMCIA_SOC_COMMON
help
Say Y here to include support for the PXA2xx PCMCIA controller
diff --git a/drivers/pcmcia/Makefile b/drivers/pcmcia/Makefile
index 7745b512a87c..fd55a6951402 100644
--- a/drivers/pcmcia/Makefile
+++ b/drivers/pcmcia/Makefile
@@ -49,6 +49,7 @@ sa1100_cs-y += sa1100_generic.o
sa1100_cs-$(CONFIG_SA1100_ASSABET) += sa1100_assabet.o
sa1100_cs-$(CONFIG_SA1100_CERF) += sa1100_cerf.o
sa1100_cs-$(CONFIG_SA1100_COLLIE) += pxa2xx_sharpsl.o
+sa1100_cs-$(CONFIG_SA1100_H3100) += sa1100_h3600.o
sa1100_cs-$(CONFIG_SA1100_H3600) += sa1100_h3600.o
sa1100_cs-$(CONFIG_SA1100_NANOENGINE) += sa1100_nanoengine.o
sa1100_cs-$(CONFIG_SA1100_SHANNON) += sa1100_shannon.o
diff --git a/drivers/pcmcia/bcm63xx_pcmcia.c b/drivers/pcmcia/bcm63xx_pcmcia.c
index 0c6aac1232fc..0802e0bc7d0c 100644
--- a/drivers/pcmcia/bcm63xx_pcmcia.c
+++ b/drivers/pcmcia/bcm63xx_pcmcia.c
@@ -475,7 +475,7 @@ static void bcm63xx_cb_exit(struct pci_dev *dev)
bcm63xx_cb_dev = NULL;
}
-static DEFINE_PCI_DEVICE_TABLE(bcm63xx_cb_table) = {
+static const struct pci_device_id bcm63xx_cb_table[] = {
{
.vendor = PCI_VENDOR_ID_BROADCOM,
.device = BCM6348_CPU_ID,
diff --git a/drivers/pcmcia/i82092.c b/drivers/pcmcia/i82092.c
index 7d47456429a1..aae7e6df99cd 100644
--- a/drivers/pcmcia/i82092.c
+++ b/drivers/pcmcia/i82092.c
@@ -25,7 +25,7 @@
MODULE_LICENSE("GPL");
/* PCI core routines */
-static DEFINE_PCI_DEVICE_TABLE(i82092aa_pci_ids) = {
+static const struct pci_device_id i82092aa_pci_ids[] = {
{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82092AA_0) },
{ }
};
diff --git a/drivers/pcmcia/pd6729.c b/drivers/pcmcia/pd6729.c
index 622dd6fe7347..34ace4854dc2 100644
--- a/drivers/pcmcia/pd6729.c
+++ b/drivers/pcmcia/pd6729.c
@@ -764,7 +764,7 @@ static void pd6729_pci_remove(struct pci_dev *dev)
kfree(socket);
}
-static DEFINE_PCI_DEVICE_TABLE(pd6729_pci_ids) = {
+static const struct pci_device_id pd6729_pci_ids[] = {
{ PCI_DEVICE(PCI_VENDOR_ID_CIRRUS, PCI_DEVICE_ID_CIRRUS_6729) },
{ }
};
diff --git a/drivers/pcmcia/sa1111_jornada720.c b/drivers/pcmcia/sa1111_jornada720.c
index 3baa3ef09682..40e040314503 100644
--- a/drivers/pcmcia/sa1111_jornada720.c
+++ b/drivers/pcmcia/sa1111_jornada720.c
@@ -9,6 +9,7 @@
#include <linux/device.h>
#include <linux/errno.h>
#include <linux/init.h>
+#include <linux/io.h>
#include <mach/hardware.h>
#include <asm/hardware/sa1111.h>
@@ -94,6 +95,7 @@ static struct pcmcia_low_level jornada720_pcmcia_ops = {
int pcmcia_jornada720_init(struct device *dev)
{
int ret = -ENODEV;
+ struct sa1111_dev *sadev = SA1111_DEV(dev);
if (machine_is_jornada720()) {
unsigned int pin = GPIO_A0 | GPIO_A1 | GPIO_A2 | GPIO_A3;
@@ -101,12 +103,12 @@ int pcmcia_jornada720_init(struct device *dev)
GRER |= 0x00000002;
/* Set GPIO_A<3:1> to be outputs for PCMCIA/CF power controller: */
- sa1111_set_io_dir(dev, pin, 0, 0);
- sa1111_set_io(dev, pin, 0);
- sa1111_set_sleep_io(dev, pin, 0);
+ sa1111_set_io_dir(sadev, pin, 0, 0);
+ sa1111_set_io(sadev, pin, 0);
+ sa1111_set_sleep_io(sadev, pin, 0);
sa11xx_drv_pcmcia_ops(&jornada720_pcmcia_ops);
- ret = sa1111_pcmcia_add(dev, &jornada720_pcmcia_ops,
+ ret = sa1111_pcmcia_add(sadev, &jornada720_pcmcia_ops,
sa11xx_drv_pcmcia_add_one);
}
diff --git a/drivers/pcmcia/vrc4173_cardu.c b/drivers/pcmcia/vrc4173_cardu.c
index d92692056e24..9fb0c3addfd4 100644
--- a/drivers/pcmcia/vrc4173_cardu.c
+++ b/drivers/pcmcia/vrc4173_cardu.c
@@ -563,7 +563,7 @@ static int vrc4173_cardu_setup(char *options)
__setup("vrc4173_cardu=", vrc4173_cardu_setup);
-static DEFINE_PCI_DEVICE_TABLE(vrc4173_cardu_id_table) = {
+static const struct pci_device_id vrc4173_cardu_id_table[] = {
{ PCI_DEVICE(PCI_VENDOR_ID_NEC, PCI_DEVICE_ID_NEC_NAPCCARD) },
{0, }
};
diff --git a/drivers/pcmcia/yenta_socket.c b/drivers/pcmcia/yenta_socket.c
index 946f90ef6020..8a23ccb41213 100644
--- a/drivers/pcmcia/yenta_socket.c
+++ b/drivers/pcmcia/yenta_socket.c
@@ -1352,7 +1352,7 @@ static const struct dev_pm_ops yenta_pm_ops = {
.driver_data = CARDBUS_TYPE_##type, \
}
-static DEFINE_PCI_DEVICE_TABLE(yenta_table) = {
+static const struct pci_device_id yenta_table[] = {
CB_ID(PCI_VENDOR_ID_TI, PCI_DEVICE_ID_TI_1031, TI),
/*
diff --git a/drivers/regulator/max77693.c b/drivers/regulator/max77693.c
index 653a58b49cdf..c67ff05fc1dd 100644
--- a/drivers/regulator/max77693.c
+++ b/drivers/regulator/max77693.c
@@ -31,6 +31,7 @@
#include <linux/mfd/max77693.h>
#include <linux/mfd/max77693-private.h>
#include <linux/regulator/of_regulator.h>
+#include <linux/regmap.h>
#define CHGIN_ILIM_STEP_20mA 20000
@@ -39,9 +40,9 @@
static int max77693_chg_is_enabled(struct regulator_dev *rdev)
{
int ret;
- u8 val;
+ unsigned int val;
- ret = max77693_read_reg(rdev->regmap, rdev->desc->enable_reg, &val);
+ ret = regmap_read(rdev->regmap, rdev->desc->enable_reg, &val);
if (ret)
return ret;
@@ -57,12 +58,11 @@ static int max77693_chg_get_current_limit(struct regulator_dev *rdev)
{
unsigned int chg_min_uA = rdev->constraints->min_uA;
unsigned int chg_max_uA = rdev->constraints->max_uA;
- u8 reg, sel;
+ unsigned int reg, sel;
unsigned int val;
int ret;
- ret = max77693_read_reg(rdev->regmap,
- MAX77693_CHG_REG_CHG_CNFG_09, &reg);
+ ret = regmap_read(rdev->regmap, MAX77693_CHG_REG_CHG_CNFG_09, &reg);
if (ret < 0)
return ret;
@@ -96,7 +96,7 @@ static int max77693_chg_set_current_limit(struct regulator_dev *rdev,
/* the first four codes for charger current are all 60mA */
sel += 3;
- return max77693_write_reg(rdev->regmap,
+ return regmap_write(rdev->regmap,
MAX77693_CHG_REG_CHG_CNFG_09, sel);
}
/* end of CHARGER regulator ops */
diff --git a/drivers/spmi/spmi.c b/drivers/spmi/spmi.c
index 3b5780710d50..1d92f5103ebf 100644
--- a/drivers/spmi/spmi.c
+++ b/drivers/spmi/spmi.c
@@ -18,7 +18,6 @@
#include <linux/of_device.h>
#include <linux/platform_device.h>
#include <linux/spmi.h>
-#include <linux/module.h>
#include <linux/pm_runtime.h>
#include <dt-bindings/spmi/spmi.h>
diff --git a/drivers/thunderbolt/Kconfig b/drivers/thunderbolt/Kconfig
new file mode 100644
index 000000000000..c121acc15bfe
--- /dev/null
+++ b/drivers/thunderbolt/Kconfig
@@ -0,0 +1,13 @@
+menuconfig THUNDERBOLT
+ tristate "Thunderbolt support for Apple devices"
+ depends on PCI
+ select CRC32
+ help
+ Cactus Ridge Thunderbolt Controller driver
+ This driver is required if you want to hotplug Thunderbolt devices on
+ Apple hardware.
+
+ Device chaining is currently not supported.
+
+ To compile this driver a module, choose M here. The module will be
+ called thunderbolt.
diff --git a/drivers/thunderbolt/Makefile b/drivers/thunderbolt/Makefile
new file mode 100644
index 000000000000..5d1053cdfa54
--- /dev/null
+++ b/drivers/thunderbolt/Makefile
@@ -0,0 +1,3 @@
+obj-${CONFIG_THUNDERBOLT} := thunderbolt.o
+thunderbolt-objs := nhi.o ctl.o tb.o switch.o cap.o path.o tunnel_pci.o eeprom.o
+
diff --git a/drivers/thunderbolt/cap.c b/drivers/thunderbolt/cap.c
new file mode 100644
index 000000000000..a7b47e7cddbd
--- /dev/null
+++ b/drivers/thunderbolt/cap.c
@@ -0,0 +1,116 @@
+/*
+ * Thunderbolt Cactus Ridge driver - capabilities lookup
+ *
+ * Copyright (c) 2014 Andreas Noever <andreas.noever@gmail.com>
+ */
+
+#include <linux/slab.h>
+#include <linux/errno.h>
+
+#include "tb.h"
+
+
+struct tb_cap_any {
+ union {
+ struct tb_cap_basic basic;
+ struct tb_cap_extended_short extended_short;
+ struct tb_cap_extended_long extended_long;
+ };
+} __packed;
+
+static bool tb_cap_is_basic(struct tb_cap_any *cap)
+{
+ /* basic.cap is u8. This checks only the lower 8 bit of cap. */
+ return cap->basic.cap != 5;
+}
+
+static bool tb_cap_is_long(struct tb_cap_any *cap)
+{
+ return !tb_cap_is_basic(cap)
+ && cap->extended_short.next == 0
+ && cap->extended_short.length == 0;
+}
+
+static enum tb_cap tb_cap(struct tb_cap_any *cap)
+{
+ if (tb_cap_is_basic(cap))
+ return cap->basic.cap;
+ else
+ /* extended_short/long have cap at the same offset. */
+ return cap->extended_short.cap;
+}
+
+static u32 tb_cap_next(struct tb_cap_any *cap, u32 offset)
+{
+ int next;
+ if (offset == 1) {
+ /*
+ * The first pointer is part of the switch header and always
+ * a simple pointer.
+ */
+ next = cap->basic.next;
+ } else {
+ /*
+ * Somehow Intel decided to use 3 different types of capability
+ * headers. It is not like anyone could have predicted that
+ * single byte offsets are not enough...
+ */
+ if (tb_cap_is_basic(cap))
+ next = cap->basic.next;
+ else if (!tb_cap_is_long(cap))
+ next = cap->extended_short.next;
+ else
+ next = cap->extended_long.next;
+ }
+ /*
+ * "Hey, we could terminate some capability lists with a null offset
+ * and others with a pointer to the last element." - "Great idea!"
+ */
+ if (next == offset)
+ return 0;
+ return next;
+}
+
+/**
+ * tb_find_cap() - find a capability
+ *
+ * Return: Returns a positive offset if the capability was found and 0 if not.
+ * Returns an error code on failure.
+ */
+int tb_find_cap(struct tb_port *port, enum tb_cfg_space space, enum tb_cap cap)
+{
+ u32 offset = 1;
+ struct tb_cap_any header;
+ int res;
+ int retries = 10;
+ while (retries--) {
+ res = tb_port_read(port, &header, space, offset, 1);
+ if (res) {
+ /* Intel needs some help with linked lists. */
+ if (space == TB_CFG_PORT && offset == 0xa
+ && port->config.type == TB_TYPE_DP_HDMI_OUT) {
+ offset = 0x39;
+ continue;
+ }
+ return res;
+ }
+ if (offset != 1) {
+ if (tb_cap(&header) == cap)
+ return offset;
+ if (tb_cap_is_long(&header)) {
+ /* tb_cap_extended_long is 2 dwords */
+ res = tb_port_read(port, &header, space,
+ offset, 2);
+ if (res)
+ return res;
+ }
+ }
+ offset = tb_cap_next(&header, offset);
+ if (!offset)
+ return 0;
+ }
+ tb_port_WARN(port,
+ "run out of retries while looking for cap %#x in config space %d, last offset: %#x\n",
+ cap, space, offset);
+ return -EIO;
+}
diff --git a/drivers/thunderbolt/ctl.c b/drivers/thunderbolt/ctl.c
new file mode 100644
index 000000000000..799634b382c6
--- /dev/null
+++ b/drivers/thunderbolt/ctl.c
@@ -0,0 +1,731 @@
+/*
+ * Thunderbolt Cactus Ridge driver - control channel and configuration commands
+ *
+ * Copyright (c) 2014 Andreas Noever <andreas.noever@gmail.com>
+ */
+
+#include <linux/crc32.h>
+#include <linux/slab.h>
+#include <linux/pci.h>
+#include <linux/dmapool.h>
+#include <linux/workqueue.h>
+#include <linux/kfifo.h>
+
+#include "ctl.h"
+
+
+struct ctl_pkg {
+ struct tb_ctl *ctl;
+ void *buffer;
+ struct ring_frame frame;
+};
+
+#define TB_CTL_RX_PKG_COUNT 10
+
+/**
+ * struct tb_cfg - thunderbolt control channel
+ */
+struct tb_ctl {
+ struct tb_nhi *nhi;
+ struct tb_ring *tx;
+ struct tb_ring *rx;
+
+ struct dma_pool *frame_pool;
+ struct ctl_pkg *rx_packets[TB_CTL_RX_PKG_COUNT];
+ DECLARE_KFIFO(response_fifo, struct ctl_pkg*, 16);
+ struct completion response_ready;
+
+ hotplug_cb callback;
+ void *callback_data;
+};
+
+
+#define tb_ctl_WARN(ctl, format, arg...) \
+ dev_WARN(&(ctl)->nhi->pdev->dev, format, ## arg)
+
+#define tb_ctl_err(ctl, format, arg...) \
+ dev_err(&(ctl)->nhi->pdev->dev, format, ## arg)
+
+#define tb_ctl_warn(ctl, format, arg...) \
+ dev_warn(&(ctl)->nhi->pdev->dev, format, ## arg)
+
+#define tb_ctl_info(ctl, format, arg...) \
+ dev_info(&(ctl)->nhi->pdev->dev, format, ## arg)
+
+
+/* configuration packets definitions */
+
+enum tb_cfg_pkg_type {
+ TB_CFG_PKG_READ = 1,
+ TB_CFG_PKG_WRITE = 2,
+ TB_CFG_PKG_ERROR = 3,
+ TB_CFG_PKG_NOTIFY_ACK = 4,
+ TB_CFG_PKG_EVENT = 5,
+ TB_CFG_PKG_XDOMAIN_REQ = 6,
+ TB_CFG_PKG_XDOMAIN_RESP = 7,
+ TB_CFG_PKG_OVERRIDE = 8,
+ TB_CFG_PKG_RESET = 9,
+ TB_CFG_PKG_PREPARE_TO_SLEEP = 0xd,
+};
+
+/* common header */
+struct tb_cfg_header {
+ u32 route_hi:22;
+ u32 unknown:10; /* highest order bit is set on replies */
+ u32 route_lo;
+} __packed;
+
+/* additional header for read/write packets */
+struct tb_cfg_address {
+ u32 offset:13; /* in dwords */
+ u32 length:6; /* in dwords */
+ u32 port:6;
+ enum tb_cfg_space space:2;
+ u32 seq:2; /* sequence number */
+ u32 zero:3;
+} __packed;
+
+/* TB_CFG_PKG_READ, response for TB_CFG_PKG_WRITE */
+struct cfg_read_pkg {
+ struct tb_cfg_header header;
+ struct tb_cfg_address addr;
+} __packed;
+
+/* TB_CFG_PKG_WRITE, response for TB_CFG_PKG_READ */
+struct cfg_write_pkg {
+ struct tb_cfg_header header;
+ struct tb_cfg_address addr;
+ u32 data[64]; /* maximum size, tb_cfg_address.length has 6 bits */
+} __packed;
+
+/* TB_CFG_PKG_ERROR */
+struct cfg_error_pkg {
+ struct tb_cfg_header header;
+ enum tb_cfg_error error:4;
+ u32 zero1:4;
+ u32 port:6;
+ u32 zero2:2; /* Both should be zero, still they are different fields. */
+ u32 zero3:16;
+} __packed;
+
+/* TB_CFG_PKG_EVENT */
+struct cfg_event_pkg {
+ struct tb_cfg_header header;
+ u32 port:6;
+ u32 zero:25;
+ bool unplug:1;
+} __packed;
+
+/* TB_CFG_PKG_RESET */
+struct cfg_reset_pkg {
+ struct tb_cfg_header header;
+} __packed;
+
+/* TB_CFG_PKG_PREPARE_TO_SLEEP */
+struct cfg_pts_pkg {
+ struct tb_cfg_header header;
+ u32 data;
+} __packed;
+
+
+/* utility functions */
+
+static u64 get_route(struct tb_cfg_header header)
+{
+ return (u64) header.route_hi << 32 | header.route_lo;
+}
+
+static struct tb_cfg_header make_header(u64 route)
+{
+ struct tb_cfg_header header = {
+ .route_hi = route >> 32,
+ .route_lo = route,
+ };
+ /* check for overflow, route_hi is not 32 bits! */
+ WARN_ON(get_route(header) != route);
+ return header;
+}
+
+static int check_header(struct ctl_pkg *pkg, u32 len, enum tb_cfg_pkg_type type,
+ u64 route)
+{
+ struct tb_cfg_header *header = pkg->buffer;
+
+ /* check frame, TODO: frame flags */
+ if (WARN(len != pkg->frame.size,
+ "wrong framesize (expected %#x, got %#x)\n",
+ len, pkg->frame.size))
+ return -EIO;
+ if (WARN(type != pkg->frame.eof, "wrong eof (expected %#x, got %#x)\n",
+ type, pkg->frame.eof))
+ return -EIO;
+ if (WARN(pkg->frame.sof, "wrong sof (expected 0x0, got %#x)\n",
+ pkg->frame.sof))
+ return -EIO;
+
+ /* check header */
+ if (WARN(header->unknown != 1 << 9,
+ "header->unknown is %#x\n", header->unknown))
+ return -EIO;
+ if (WARN(route != get_route(*header),
+ "wrong route (expected %llx, got %llx)",
+ route, get_route(*header)))
+ return -EIO;
+ return 0;
+}
+
+static int check_config_address(struct tb_cfg_address addr,
+ enum tb_cfg_space space, u32 offset,
+ u32 length)
+{
+ if (WARN(addr.zero, "addr.zero is %#x\n", addr.zero))
+ return -EIO;
+ if (WARN(space != addr.space, "wrong space (expected %x, got %x\n)",
+ space, addr.space))
+ return -EIO;
+ if (WARN(offset != addr.offset, "wrong offset (expected %x, got %x\n)",
+ offset, addr.offset))
+ return -EIO;
+ if (WARN(length != addr.length, "wrong space (expected %x, got %x\n)",
+ length, addr.length))
+ return -EIO;
+ if (WARN(addr.seq, "addr.seq is %#x\n", addr.seq))
+ return -EIO;
+ /*
+ * We cannot check addr->port as it is set to the upstream port of the
+ * sender.
+ */
+ return 0;
+}
+
+static struct tb_cfg_result decode_error(struct ctl_pkg *response)
+{
+ struct cfg_error_pkg *pkg = response->buffer;
+ struct tb_cfg_result res = { 0 };
+ res.response_route = get_route(pkg->header);
+ res.response_port = 0;
+ res.err = check_header(response, sizeof(*pkg), TB_CFG_PKG_ERROR,
+ get_route(pkg->header));
+ if (res.err)
+ return res;
+
+ WARN(pkg->zero1, "pkg->zero1 is %#x\n", pkg->zero1);
+ WARN(pkg->zero2, "pkg->zero1 is %#x\n", pkg->zero1);
+ WARN(pkg->zero3, "pkg->zero1 is %#x\n", pkg->zero1);
+ res.err = 1;
+ res.tb_error = pkg->error;
+ res.response_port = pkg->port;
+ return res;
+
+}
+
+static struct tb_cfg_result parse_header(struct ctl_pkg *pkg, u32 len,
+ enum tb_cfg_pkg_type type, u64 route)
+{
+ struct tb_cfg_header *header = pkg->buffer;
+ struct tb_cfg_result res = { 0 };
+
+ if (pkg->frame.eof == TB_CFG_PKG_ERROR)
+ return decode_error(pkg);
+
+ res.response_port = 0; /* will be updated later for cfg_read/write */
+ res.response_route = get_route(*header);
+ res.err = check_header(pkg, len, type, route);
+ return res;
+}
+
+static void tb_cfg_print_error(struct tb_ctl *ctl,
+ const struct tb_cfg_result *res)
+{
+ WARN_ON(res->err != 1);
+ switch (res->tb_error) {
+ case TB_CFG_ERROR_PORT_NOT_CONNECTED:
+ /* Port is not connected. This can happen during surprise
+ * removal. Do not warn. */
+ return;
+ case TB_CFG_ERROR_INVALID_CONFIG_SPACE:
+ /*
+ * Invalid cfg_space/offset/length combination in
+ * cfg_read/cfg_write.
+ */
+ tb_ctl_WARN(ctl,
+ "CFG_ERROR(%llx:%x): Invalid config space of offset\n",
+ res->response_route, res->response_port);
+ return;
+ case TB_CFG_ERROR_NO_SUCH_PORT:
+ /*
+ * - The route contains a non-existent port.
+ * - The route contains a non-PHY port (e.g. PCIe).
+ * - The port in cfg_read/cfg_write does not exist.
+ */
+ tb_ctl_WARN(ctl, "CFG_ERROR(%llx:%x): Invalid port\n",
+ res->response_route, res->response_port);
+ return;
+ case TB_CFG_ERROR_LOOP:
+ tb_ctl_WARN(ctl, "CFG_ERROR(%llx:%x): Route contains a loop\n",
+ res->response_route, res->response_port);
+ return;
+ default:
+ /* 5,6,7,9 and 11 are also valid error codes */
+ tb_ctl_WARN(ctl, "CFG_ERROR(%llx:%x): Unknown error\n",
+ res->response_route, res->response_port);
+ return;
+ }
+}
+
+static void cpu_to_be32_array(__be32 *dst, u32 *src, size_t len)
+{
+ int i;
+ for (i = 0; i < len; i++)
+ dst[i] = cpu_to_be32(src[i]);
+}
+
+static void be32_to_cpu_array(u32 *dst, __be32 *src, size_t len)
+{
+ int i;
+ for (i = 0; i < len; i++)
+ dst[i] = be32_to_cpu(src[i]);
+}
+
+static __be32 tb_crc(void *data, size_t len)
+{
+ return cpu_to_be32(~__crc32c_le(~0, data, len));
+}
+
+static void tb_ctl_pkg_free(struct ctl_pkg *pkg)
+{
+ if (pkg) {
+ dma_pool_free(pkg->ctl->frame_pool,
+ pkg->buffer, pkg->frame.buffer_phy);
+ kfree(pkg);
+ }
+}
+
+static struct ctl_pkg *tb_ctl_pkg_alloc(struct tb_ctl *ctl)
+{
+ struct ctl_pkg *pkg = kzalloc(sizeof(*pkg), GFP_KERNEL);
+ if (!pkg)
+ return NULL;
+ pkg->ctl = ctl;
+ pkg->buffer = dma_pool_alloc(ctl->frame_pool, GFP_KERNEL,
+ &pkg->frame.buffer_phy);
+ if (!pkg->buffer) {
+ kfree(pkg);
+ return NULL;
+ }
+ return pkg;
+}
+
+
+/* RX/TX handling */
+
+static void tb_ctl_tx_callback(struct tb_ring *ring, struct ring_frame *frame,
+ bool canceled)
+{
+ struct ctl_pkg *pkg = container_of(frame, typeof(*pkg), frame);
+ tb_ctl_pkg_free(pkg);
+}
+
+/**
+ * tb_cfg_tx() - transmit a packet on the control channel
+ *
+ * len must be a multiple of four.
+ *
+ * Return: Returns 0 on success or an error code on failure.
+ */
+static int tb_ctl_tx(struct tb_ctl *ctl, void *data, size_t len,
+ enum tb_cfg_pkg_type type)
+{
+ int res;
+ struct ctl_pkg *pkg;
+ if (len % 4 != 0) { /* required for le->be conversion */
+ tb_ctl_WARN(ctl, "TX: invalid size: %zu\n", len);
+ return -EINVAL;
+ }
+ if (len > TB_FRAME_SIZE - 4) { /* checksum is 4 bytes */
+ tb_ctl_WARN(ctl, "TX: packet too large: %zu/%d\n",
+ len, TB_FRAME_SIZE - 4);
+ return -EINVAL;
+ }
+ pkg = tb_ctl_pkg_alloc(ctl);
+ if (!pkg)
+ return -ENOMEM;
+ pkg->frame.callback = tb_ctl_tx_callback;
+ pkg->frame.size = len + 4;
+ pkg->frame.sof = type;
+ pkg->frame.eof = type;
+ cpu_to_be32_array(pkg->buffer, data, len / 4);
+ *(__be32 *) (pkg->buffer + len) = tb_crc(pkg->buffer, len);
+
+ res = ring_tx(ctl->tx, &pkg->frame);
+ if (res) /* ring is stopped */
+ tb_ctl_pkg_free(pkg);
+ return res;
+}
+
+/**
+ * tb_ctl_handle_plug_event() - acknowledge a plug event, invoke ctl->callback
+ */
+static void tb_ctl_handle_plug_event(struct tb_ctl *ctl,
+ struct ctl_pkg *response)
+{
+ struct cfg_event_pkg *pkg = response->buffer;
+ u64 route = get_route(pkg->header);
+
+ if (check_header(response, sizeof(*pkg), TB_CFG_PKG_EVENT, route)) {
+ tb_ctl_warn(ctl, "malformed TB_CFG_PKG_EVENT\n");
+ return;
+ }
+
+ if (tb_cfg_error(ctl, route, pkg->port, TB_CFG_ERROR_ACK_PLUG_EVENT))
+ tb_ctl_warn(ctl, "could not ack plug event on %llx:%x\n",
+ route, pkg->port);
+ WARN(pkg->zero, "pkg->zero is %#x\n", pkg->zero);
+ ctl->callback(ctl->callback_data, route, pkg->port, pkg->unplug);
+}
+
+static void tb_ctl_rx_submit(struct ctl_pkg *pkg)
+{
+ ring_rx(pkg->ctl->rx, &pkg->frame); /*
+ * We ignore failures during stop.
+ * All rx packets are referenced
+ * from ctl->rx_packets, so we do
+ * not loose them.
+ */
+}
+
+static void tb_ctl_rx_callback(struct tb_ring *ring, struct ring_frame *frame,
+ bool canceled)
+{
+ struct ctl_pkg *pkg = container_of(frame, typeof(*pkg), frame);
+
+ if (canceled)
+ return; /*
+ * ring is stopped, packet is referenced from
+ * ctl->rx_packets.
+ */
+
+ if (frame->size < 4 || frame->size % 4 != 0) {
+ tb_ctl_err(pkg->ctl, "RX: invalid size %#x, dropping packet\n",
+ frame->size);
+ goto rx;
+ }
+
+ frame->size -= 4; /* remove checksum */
+ if (*(__be32 *) (pkg->buffer + frame->size)
+ != tb_crc(pkg->buffer, frame->size)) {
+ tb_ctl_err(pkg->ctl,
+ "RX: checksum mismatch, dropping packet\n");
+ goto rx;
+ }
+ be32_to_cpu_array(pkg->buffer, pkg->buffer, frame->size / 4);
+
+ if (frame->eof == TB_CFG_PKG_EVENT) {
+ tb_ctl_handle_plug_event(pkg->ctl, pkg);
+ goto rx;
+ }
+ if (!kfifo_put(&pkg->ctl->response_fifo, pkg)) {
+ tb_ctl_err(pkg->ctl, "RX: fifo is full\n");
+ goto rx;
+ }
+ complete(&pkg->ctl->response_ready);
+ return;
+rx:
+ tb_ctl_rx_submit(pkg);
+}
+
+/**
+ * tb_ctl_rx() - receive a packet from the control channel
+ */
+static struct tb_cfg_result tb_ctl_rx(struct tb_ctl *ctl, void *buffer,
+ size_t length, int timeout_msec,
+ u64 route, enum tb_cfg_pkg_type type)
+{
+ struct tb_cfg_result res;
+ struct ctl_pkg *pkg;
+
+ if (!wait_for_completion_timeout(&ctl->response_ready,
+ msecs_to_jiffies(timeout_msec))) {
+ tb_ctl_WARN(ctl, "RX: timeout\n");
+ return (struct tb_cfg_result) { .err = -ETIMEDOUT };
+ }
+ if (!kfifo_get(&ctl->response_fifo, &pkg)) {
+ tb_ctl_WARN(ctl, "empty kfifo\n");
+ return (struct tb_cfg_result) { .err = -EIO };
+ }
+
+ res = parse_header(pkg, length, type, route);
+ if (!res.err)
+ memcpy(buffer, pkg->buffer, length);
+ tb_ctl_rx_submit(pkg);
+ return res;
+}
+
+
+/* public interface, alloc/start/stop/free */
+
+/**
+ * tb_ctl_alloc() - allocate a control channel
+ *
+ * cb will be invoked once for every hot plug event.
+ *
+ * Return: Returns a pointer on success or NULL on failure.
+ */
+struct tb_ctl *tb_ctl_alloc(struct tb_nhi *nhi, hotplug_cb cb, void *cb_data)
+{
+ int i;
+ struct tb_ctl *ctl = kzalloc(sizeof(*ctl), GFP_KERNEL);
+ if (!ctl)
+ return NULL;
+ ctl->nhi = nhi;
+ ctl->callback = cb;
+ ctl->callback_data = cb_data;
+
+ init_completion(&ctl->response_ready);
+ INIT_KFIFO(ctl->response_fifo);
+ ctl->frame_pool = dma_pool_create("thunderbolt_ctl", &nhi->pdev->dev,
+ TB_FRAME_SIZE, 4, 0);
+ if (!ctl->frame_pool)
+ goto err;
+
+ ctl->tx = ring_alloc_tx(nhi, 0, 10);
+ if (!ctl->tx)
+ goto err;
+
+ ctl->rx = ring_alloc_rx(nhi, 0, 10);
+ if (!ctl->rx)
+ goto err;
+
+ for (i = 0; i < TB_CTL_RX_PKG_COUNT; i++) {
+ ctl->rx_packets[i] = tb_ctl_pkg_alloc(ctl);
+ if (!ctl->rx_packets[i])
+ goto err;
+ ctl->rx_packets[i]->frame.callback = tb_ctl_rx_callback;
+ }
+
+ tb_ctl_info(ctl, "control channel created\n");
+ return ctl;
+err:
+ tb_ctl_free(ctl);
+ return NULL;
+}
+
+/**
+ * tb_ctl_free() - free a control channel
+ *
+ * Must be called after tb_ctl_stop.
+ *
+ * Must NOT be called from ctl->callback.
+ */
+void tb_ctl_free(struct tb_ctl *ctl)
+{
+ int i;
+ if (ctl->rx)
+ ring_free(ctl->rx);
+ if (ctl->tx)
+ ring_free(ctl->tx);
+
+ /* free RX packets */
+ for (i = 0; i < TB_CTL_RX_PKG_COUNT; i++)
+ tb_ctl_pkg_free(ctl->rx_packets[i]);
+
+
+ if (ctl->frame_pool)
+ dma_pool_destroy(ctl->frame_pool);
+ kfree(ctl);
+}
+
+/**
+ * tb_cfg_start() - start/resume the control channel
+ */
+void tb_ctl_start(struct tb_ctl *ctl)
+{
+ int i;
+ tb_ctl_info(ctl, "control channel starting...\n");
+ ring_start(ctl->tx); /* is used to ack hotplug packets, start first */
+ ring_start(ctl->rx);
+ for (i = 0; i < TB_CTL_RX_PKG_COUNT; i++)
+ tb_ctl_rx_submit(ctl->rx_packets[i]);
+}
+
+/**
+ * control() - pause the control channel
+ *
+ * All invocations of ctl->callback will have finished after this method
+ * returns.
+ *
+ * Must NOT be called from ctl->callback.
+ */
+void tb_ctl_stop(struct tb_ctl *ctl)
+{
+ ring_stop(ctl->rx);
+ ring_stop(ctl->tx);
+
+ if (!kfifo_is_empty(&ctl->response_fifo))
+ tb_ctl_WARN(ctl, "dangling response in response_fifo\n");
+ kfifo_reset(&ctl->response_fifo);
+ tb_ctl_info(ctl, "control channel stopped\n");
+}
+
+/* public interface, commands */
+
+/**
+ * tb_cfg_error() - send error packet
+ *
+ * Return: Returns 0 on success or an error code on failure.
+ */
+int tb_cfg_error(struct tb_ctl *ctl, u64 route, u32 port,
+ enum tb_cfg_error error)
+{
+ struct cfg_error_pkg pkg = {
+ .header = make_header(route),
+ .port = port,
+ .error = error,
+ };
+ tb_ctl_info(ctl, "resetting error on %llx:%x.\n", route, port);
+ return tb_ctl_tx(ctl, &pkg, sizeof(pkg), TB_CFG_PKG_ERROR);
+}
+
+/**
+ * tb_cfg_reset() - send a reset packet and wait for a response
+ *
+ * If the switch at route is incorrectly configured then we will not receive a
+ * reply (even though the switch will reset). The caller should check for
+ * -ETIMEDOUT and attempt to reconfigure the switch.
+ */
+struct tb_cfg_result tb_cfg_reset(struct tb_ctl *ctl, u64 route,
+ int timeout_msec)
+{
+ int err;
+ struct cfg_reset_pkg request = { .header = make_header(route) };
+ struct tb_cfg_header reply;
+
+ err = tb_ctl_tx(ctl, &request, sizeof(request), TB_CFG_PKG_RESET);
+ if (err)
+ return (struct tb_cfg_result) { .err = err };
+
+ return tb_ctl_rx(ctl, &reply, sizeof(reply), timeout_msec, route,
+ TB_CFG_PKG_RESET);
+}
+
+/**
+ * tb_cfg_read() - read from config space into buffer
+ *
+ * Offset and length are in dwords.
+ */
+struct tb_cfg_result tb_cfg_read_raw(struct tb_ctl *ctl, void *buffer,
+ u64 route, u32 port, enum tb_cfg_space space,
+ u32 offset, u32 length, int timeout_msec)
+{
+ struct tb_cfg_result res = { 0 };
+ struct cfg_read_pkg request = {
+ .header = make_header(route),
+ .addr = {
+ .port = port,
+ .space = space,
+ .offset = offset,
+ .length = length,
+ },
+ };
+ struct cfg_write_pkg reply;
+
+ res.err = tb_ctl_tx(ctl, &request, sizeof(request), TB_CFG_PKG_READ);
+ if (res.err)
+ return res;
+
+ res = tb_ctl_rx(ctl, &reply, 12 + 4 * length, timeout_msec, route,
+ TB_CFG_PKG_READ);
+ if (res.err)
+ return res;
+
+ res.response_port = reply.addr.port;
+ res.err = check_config_address(reply.addr, space, offset, length);
+ if (!res.err)
+ memcpy(buffer, &reply.data, 4 * length);
+ return res;
+}
+
+/**
+ * tb_cfg_write() - write from buffer into config space
+ *
+ * Offset and length are in dwords.
+ */
+struct tb_cfg_result tb_cfg_write_raw(struct tb_ctl *ctl, void *buffer,
+ u64 route, u32 port, enum tb_cfg_space space,
+ u32 offset, u32 length, int timeout_msec)
+{
+ struct tb_cfg_result res = { 0 };
+ struct cfg_write_pkg request = {
+ .header = make_header(route),
+ .addr = {
+ .port = port,
+ .space = space,
+ .offset = offset,
+ .length = length,
+ },
+ };
+ struct cfg_read_pkg reply;
+
+ memcpy(&request.data, buffer, length * 4);
+
+ res.err = tb_ctl_tx(ctl, &request, 12 + 4 * length, TB_CFG_PKG_WRITE);
+ if (res.err)
+ return res;
+
+ res = tb_ctl_rx(ctl, &reply, sizeof(reply), timeout_msec, route,
+ TB_CFG_PKG_WRITE);
+ if (res.err)
+ return res;
+
+ res.response_port = reply.addr.port;
+ res.err = check_config_address(reply.addr, space, offset, length);
+ return res;
+}
+
+int tb_cfg_read(struct tb_ctl *ctl, void *buffer, u64 route, u32 port,
+ enum tb_cfg_space space, u32 offset, u32 length)
+{
+ struct tb_cfg_result res = tb_cfg_read_raw(ctl, buffer, route, port,
+ space, offset, length, TB_CFG_DEFAULT_TIMEOUT);
+ if (res.err == 1) {
+ tb_cfg_print_error(ctl, &res);
+ return -EIO;
+ }
+ WARN(res.err, "tb_cfg_read: %d\n", res.err);
+ return res.err;
+}
+
+int tb_cfg_write(struct tb_ctl *ctl, void *buffer, u64 route, u32 port,
+ enum tb_cfg_space space, u32 offset, u32 length)
+{
+ struct tb_cfg_result res = tb_cfg_write_raw(ctl, buffer, route, port,
+ space, offset, length, TB_CFG_DEFAULT_TIMEOUT);
+ if (res.err == 1) {
+ tb_cfg_print_error(ctl, &res);
+ return -EIO;
+ }
+ WARN(res.err, "tb_cfg_write: %d\n", res.err);
+ return res.err;
+}
+
+/**
+ * tb_cfg_get_upstream_port() - get upstream port number of switch at route
+ *
+ * Reads the first dword from the switches TB_CFG_SWITCH config area and
+ * returns the port number from which the reply originated.
+ *
+ * Return: Returns the upstream port number on success or an error code on
+ * failure.
+ */
+int tb_cfg_get_upstream_port(struct tb_ctl *ctl, u64 route)
+{
+ u32 dummy;
+ struct tb_cfg_result res = tb_cfg_read_raw(ctl, &dummy, route, 0,
+ TB_CFG_SWITCH, 0, 1,
+ TB_CFG_DEFAULT_TIMEOUT);
+ if (res.err == 1)
+ return -EIO;
+ if (res.err)
+ return res.err;
+ return res.response_port;
+}
diff --git a/drivers/thunderbolt/ctl.h b/drivers/thunderbolt/ctl.h
new file mode 100644
index 000000000000..ba87d6e731dd
--- /dev/null
+++ b/drivers/thunderbolt/ctl.h
@@ -0,0 +1,75 @@
+/*
+ * Thunderbolt Cactus Ridge driver - control channel and configuration commands
+ *
+ * Copyright (c) 2014 Andreas Noever <andreas.noever@gmail.com>
+ */
+
+#ifndef _TB_CFG
+#define _TB_CFG
+
+#include "nhi.h"
+
+/* control channel */
+struct tb_ctl;
+
+typedef void (*hotplug_cb)(void *data, u64 route, u8 port, bool unplug);
+
+struct tb_ctl *tb_ctl_alloc(struct tb_nhi *nhi, hotplug_cb cb, void *cb_data);
+void tb_ctl_start(struct tb_ctl *ctl);
+void tb_ctl_stop(struct tb_ctl *ctl);
+void tb_ctl_free(struct tb_ctl *ctl);
+
+/* configuration commands */
+
+#define TB_CFG_DEFAULT_TIMEOUT 5000 /* msec */
+
+enum tb_cfg_space {
+ TB_CFG_HOPS = 0,
+ TB_CFG_PORT = 1,
+ TB_CFG_SWITCH = 2,
+ TB_CFG_COUNTERS = 3,
+};
+
+enum tb_cfg_error {
+ TB_CFG_ERROR_PORT_NOT_CONNECTED = 0,
+ TB_CFG_ERROR_INVALID_CONFIG_SPACE = 2,
+ TB_CFG_ERROR_NO_SUCH_PORT = 4,
+ TB_CFG_ERROR_ACK_PLUG_EVENT = 7, /* send as reply to TB_CFG_PKG_EVENT */
+ TB_CFG_ERROR_LOOP = 8,
+};
+
+struct tb_cfg_result {
+ u64 response_route;
+ u32 response_port; /*
+ * If err = 1 then this is the port that send the
+ * error.
+ * If err = 0 and if this was a cfg_read/write then
+ * this is the the upstream port of the responding
+ * switch.
+ * Otherwise the field is set to zero.
+ */
+ int err; /* negative errors, 0 for success, 1 for tb errors */
+ enum tb_cfg_error tb_error; /* valid if err == 1 */
+};
+
+
+int tb_cfg_error(struct tb_ctl *ctl, u64 route, u32 port,
+ enum tb_cfg_error error);
+struct tb_cfg_result tb_cfg_reset(struct tb_ctl *ctl, u64 route,
+ int timeout_msec);
+struct tb_cfg_result tb_cfg_read_raw(struct tb_ctl *ctl, void *buffer,
+ u64 route, u32 port,
+ enum tb_cfg_space space, u32 offset,
+ u32 length, int timeout_msec);
+struct tb_cfg_result tb_cfg_write_raw(struct tb_ctl *ctl, void *buffer,
+ u64 route, u32 port,
+ enum tb_cfg_space space, u32 offset,
+ u32 length, int timeout_msec);
+int tb_cfg_read(struct tb_ctl *ctl, void *buffer, u64 route, u32 port,
+ enum tb_cfg_space space, u32 offset, u32 length);
+int tb_cfg_write(struct tb_ctl *ctl, void *buffer, u64 route, u32 port,
+ enum tb_cfg_space space, u32 offset, u32 length);
+int tb_cfg_get_upstream_port(struct tb_ctl *ctl, u64 route);
+
+
+#endif
diff --git a/drivers/thunderbolt/eeprom.c b/drivers/thunderbolt/eeprom.c
new file mode 100644
index 000000000000..0dde34e3a7c5
--- /dev/null
+++ b/drivers/thunderbolt/eeprom.c
@@ -0,0 +1,449 @@
+/*
+ * Thunderbolt Cactus Ridge driver - eeprom access
+ *
+ * Copyright (c) 2014 Andreas Noever <andreas.noever@gmail.com>
+ */
+
+#include <linux/crc32.h>
+#include <linux/slab.h>
+#include "tb.h"
+
+/**
+ * tb_eeprom_ctl_write() - write control word
+ */
+static int tb_eeprom_ctl_write(struct tb_switch *sw, struct tb_eeprom_ctl *ctl)
+{
+ return tb_sw_write(sw, ctl, TB_CFG_SWITCH, sw->cap_plug_events + 4, 1);
+}
+
+/**
+ * tb_eeprom_ctl_write() - read control word
+ */
+static int tb_eeprom_ctl_read(struct tb_switch *sw, struct tb_eeprom_ctl *ctl)
+{
+ return tb_sw_read(sw, ctl, TB_CFG_SWITCH, sw->cap_plug_events + 4, 1);
+}
+
+enum tb_eeprom_transfer {
+ TB_EEPROM_IN,
+ TB_EEPROM_OUT,
+};
+
+/**
+ * tb_eeprom_active - enable rom access
+ *
+ * WARNING: Always disable access after usage. Otherwise the controller will
+ * fail to reprobe.
+ */
+static int tb_eeprom_active(struct tb_switch *sw, bool enable)
+{
+ struct tb_eeprom_ctl ctl;
+ int res = tb_eeprom_ctl_read(sw, &ctl);
+ if (res)
+ return res;
+ if (enable) {
+ ctl.access_high = 1;
+ res = tb_eeprom_ctl_write(sw, &ctl);
+ if (res)
+ return res;
+ ctl.access_low = 0;
+ return tb_eeprom_ctl_write(sw, &ctl);
+ } else {
+ ctl.access_low = 1;
+ res = tb_eeprom_ctl_write(sw, &ctl);
+ if (res)
+ return res;
+ ctl.access_high = 0;
+ return tb_eeprom_ctl_write(sw, &ctl);
+ }
+}
+
+/**
+ * tb_eeprom_transfer - transfer one bit
+ *
+ * If TB_EEPROM_IN is passed, then the bit can be retrieved from ctl->data_in.
+ * If TB_EEPROM_OUT is passed, then ctl->data_out will be written.
+ */
+static int tb_eeprom_transfer(struct tb_switch *sw, struct tb_eeprom_ctl *ctl,
+ enum tb_eeprom_transfer direction)
+{
+ int res;
+ if (direction == TB_EEPROM_OUT) {
+ res = tb_eeprom_ctl_write(sw, ctl);
+ if (res)
+ return res;
+ }
+ ctl->clock = 1;
+ res = tb_eeprom_ctl_write(sw, ctl);
+ if (res)
+ return res;
+ if (direction == TB_EEPROM_IN) {
+ res = tb_eeprom_ctl_read(sw, ctl);
+ if (res)
+ return res;
+ }
+ ctl->clock = 0;
+ return tb_eeprom_ctl_write(sw, ctl);
+}
+
+/**
+ * tb_eeprom_out - write one byte to the bus
+ */
+static int tb_eeprom_out(struct tb_switch *sw, u8 val)
+{
+ struct tb_eeprom_ctl ctl;
+ int i;
+ int res = tb_eeprom_ctl_read(sw, &ctl);
+ if (res)
+ return res;
+ for (i = 0; i < 8; i++) {
+ ctl.data_out = val & 0x80;
+ res = tb_eeprom_transfer(sw, &ctl, TB_EEPROM_OUT);
+ if (res)
+ return res;
+ val <<= 1;
+ }
+ return 0;
+}
+
+/**
+ * tb_eeprom_in - read one byte from the bus
+ */
+static int tb_eeprom_in(struct tb_switch *sw, u8 *val)
+{
+ struct tb_eeprom_ctl ctl;
+ int i;
+ int res = tb_eeprom_ctl_read(sw, &ctl);
+ if (res)
+ return res;
+ *val = 0;
+ for (i = 0; i < 8; i++) {
+ *val <<= 1;
+ res = tb_eeprom_transfer(sw, &ctl, TB_EEPROM_IN);
+ if (res)
+ return res;
+ *val |= ctl.data_in;
+ }
+ return 0;
+}
+
+/**
+ * tb_eeprom_read_n - read count bytes from offset into val
+ */
+static int tb_eeprom_read_n(struct tb_switch *sw, u16 offset, u8 *val,
+ size_t count)
+{
+ int i, res;
+ res = tb_eeprom_active(sw, true);
+ if (res)
+ return res;
+ res = tb_eeprom_out(sw, 3);
+ if (res)
+ return res;
+ res = tb_eeprom_out(sw, offset >> 8);
+ if (res)
+ return res;
+ res = tb_eeprom_out(sw, offset);
+ if (res)
+ return res;
+ for (i = 0; i < count; i++) {
+ res = tb_eeprom_in(sw, val + i);
+ if (res)
+ return res;
+ }
+ return tb_eeprom_active(sw, false);
+}
+
+static u8 tb_crc8(u8 *data, int len)
+{
+ int i, j;
+ u8 val = 0xff;
+ for (i = 0; i < len; i++) {
+ val ^= data[i];
+ for (j = 0; j < 8; j++)
+ val = (val << 1) ^ ((val & 0x80) ? 7 : 0);
+ }
+ return val;
+}
+
+static u32 tb_crc32(void *data, size_t len)
+{
+ return ~__crc32c_le(~0, data, len);
+}
+
+#define TB_DROM_DATA_START 13
+struct tb_drom_header {
+ /* BYTE 0 */
+ u8 uid_crc8; /* checksum for uid */
+ /* BYTES 1-8 */
+ u64 uid;
+ /* BYTES 9-12 */
+ u32 data_crc32; /* checksum for data_len bytes starting at byte 13 */
+ /* BYTE 13 */
+ u8 device_rom_revision; /* should be <= 1 */
+ u16 data_len:10;
+ u8 __unknown1:6;
+ /* BYTES 16-21 */
+ u16 vendor_id;
+ u16 model_id;
+ u8 model_rev;
+ u8 eeprom_rev;
+} __packed;
+
+enum tb_drom_entry_type {
+ /* force unsigned to prevent "one-bit signed bitfield" warning */
+ TB_DROM_ENTRY_GENERIC = 0U,
+ TB_DROM_ENTRY_PORT,
+};
+
+struct tb_drom_entry_header {
+ u8 len;
+ u8 index:6;
+ bool port_disabled:1; /* only valid if type is TB_DROM_ENTRY_PORT */
+ enum tb_drom_entry_type type:1;
+} __packed;
+
+struct tb_drom_entry_port {
+ /* BYTES 0-1 */
+ struct tb_drom_entry_header header;
+ /* BYTE 2 */
+ u8 dual_link_port_rid:4;
+ u8 link_nr:1;
+ u8 unknown1:2;
+ bool has_dual_link_port:1;
+
+ /* BYTE 3 */
+ u8 dual_link_port_nr:6;
+ u8 unknown2:2;
+
+ /* BYTES 4 - 5 TODO decode */
+ u8 micro2:4;
+ u8 micro1:4;
+ u8 micro3;
+
+ /* BYTES 5-6, TODO: verify (find hardware that has these set) */
+ u8 peer_port_rid:4;
+ u8 unknown3:3;
+ bool has_peer_port:1;
+ u8 peer_port_nr:6;
+ u8 unknown4:2;
+} __packed;
+
+
+/**
+ * tb_eeprom_get_drom_offset - get drom offset within eeprom
+ */
+static int tb_eeprom_get_drom_offset(struct tb_switch *sw, u16 *offset)
+{
+ struct tb_cap_plug_events cap;
+ int res;
+ if (!sw->cap_plug_events) {
+ tb_sw_warn(sw, "no TB_CAP_PLUG_EVENTS, cannot read eeprom\n");
+ return -ENOSYS;
+ }
+ res = tb_sw_read(sw, &cap, TB_CFG_SWITCH, sw->cap_plug_events,
+ sizeof(cap) / 4);
+ if (res)
+ return res;
+
+ if (!cap.eeprom_ctl.present || cap.eeprom_ctl.not_present) {
+ tb_sw_warn(sw, "no NVM\n");
+ return -ENOSYS;
+ }
+
+ if (cap.drom_offset > 0xffff) {
+ tb_sw_warn(sw, "drom offset is larger than 0xffff: %#x\n",
+ cap.drom_offset);
+ return -ENXIO;
+ }
+ *offset = cap.drom_offset;
+ return 0;
+}
+
+/**
+ * tb_drom_read_uid_only - read uid directly from drom
+ *
+ * Does not use the cached copy in sw->drom. Used during resume to check switch
+ * identity.
+ */
+int tb_drom_read_uid_only(struct tb_switch *sw, u64 *uid)
+{
+ u8 data[9];
+ u16 drom_offset;
+ u8 crc;
+ int res = tb_eeprom_get_drom_offset(sw, &drom_offset);
+ if (res)
+ return res;
+
+ /* read uid */
+ res = tb_eeprom_read_n(sw, drom_offset, data, 9);
+ if (res)
+ return res;
+
+ crc = tb_crc8(data + 1, 8);
+ if (crc != data[0]) {
+ tb_sw_warn(sw, "uid crc8 missmatch (expected: %#x, got: %#x)\n",
+ data[0], crc);
+ return -EIO;
+ }
+
+ *uid = *(u64 *)(data+1);
+ return 0;
+}
+
+static void tb_drom_parse_port_entry(struct tb_port *port,
+ struct tb_drom_entry_port *entry)
+{
+ port->link_nr = entry->link_nr;
+ if (entry->has_dual_link_port)
+ port->dual_link_port =
+ &port->sw->ports[entry->dual_link_port_nr];
+}
+
+static int tb_drom_parse_entry(struct tb_switch *sw,
+ struct tb_drom_entry_header *header)
+{
+ struct tb_port *port;
+ int res;
+ enum tb_port_type type;
+
+ if (header->type != TB_DROM_ENTRY_PORT)
+ return 0;
+
+ port = &sw->ports[header->index];
+ port->disabled = header->port_disabled;
+ if (port->disabled)
+ return 0;
+
+ res = tb_port_read(port, &type, TB_CFG_PORT, 2, 1);
+ if (res)
+ return res;
+ type &= 0xffffff;
+
+ if (type == TB_TYPE_PORT) {
+ struct tb_drom_entry_port *entry = (void *) header;
+ if (header->len != sizeof(*entry)) {
+ tb_sw_warn(sw,
+ "port entry has size %#x (expected %#zx)\n",
+ header->len, sizeof(struct tb_drom_entry_port));
+ return -EIO;
+ }
+ tb_drom_parse_port_entry(port, entry);
+ }
+ return 0;
+}
+
+/**
+ * tb_drom_parse_entries - parse the linked list of drom entries
+ *
+ * Drom must have been copied to sw->drom.
+ */
+static int tb_drom_parse_entries(struct tb_switch *sw)
+{
+ struct tb_drom_header *header = (void *) sw->drom;
+ u16 pos = sizeof(*header);
+ u16 drom_size = header->data_len + TB_DROM_DATA_START;
+
+ while (pos < drom_size) {
+ struct tb_drom_entry_header *entry = (void *) (sw->drom + pos);
+ if (pos + 1 == drom_size || pos + entry->len > drom_size
+ || !entry->len) {
+ tb_sw_warn(sw, "drom buffer overrun, aborting\n");
+ return -EIO;
+ }
+
+ tb_drom_parse_entry(sw, entry);
+
+ pos += entry->len;
+ }
+ return 0;
+}
+
+/**
+ * tb_drom_read - copy drom to sw->drom and parse it
+ */
+int tb_drom_read(struct tb_switch *sw)
+{
+ u16 drom_offset;
+ u16 size;
+ u32 crc;
+ struct tb_drom_header *header;
+ int res;
+ if (sw->drom)
+ return 0;
+
+ if (tb_route(sw) == 0) {
+ /*
+ * The root switch contains only a dummy drom (header only,
+ * no entries). Hardcode the configuration here.
+ */
+ tb_drom_read_uid_only(sw, &sw->uid);
+
+ sw->ports[1].link_nr = 0;
+ sw->ports[2].link_nr = 1;
+ sw->ports[1].dual_link_port = &sw->ports[2];
+ sw->ports[2].dual_link_port = &sw->ports[1];
+
+ sw->ports[3].link_nr = 0;
+ sw->ports[4].link_nr = 1;
+ sw->ports[3].dual_link_port = &sw->ports[4];
+ sw->ports[4].dual_link_port = &sw->ports[3];
+ return 0;
+ }
+
+ res = tb_eeprom_get_drom_offset(sw, &drom_offset);
+ if (res)
+ return res;
+
+ res = tb_eeprom_read_n(sw, drom_offset + 14, (u8 *) &size, 2);
+ if (res)
+ return res;
+ size &= 0x3ff;
+ size += TB_DROM_DATA_START;
+ tb_sw_info(sw, "reading drom (length: %#x)\n", size);
+ if (size < sizeof(*header)) {
+ tb_sw_warn(sw, "drom too small, aborting\n");
+ return -EIO;
+ }
+
+ sw->drom = kzalloc(size, GFP_KERNEL);
+ if (!sw->drom)
+ return -ENOMEM;
+ res = tb_eeprom_read_n(sw, drom_offset, sw->drom, size);
+ if (res)
+ goto err;
+
+ header = (void *) sw->drom;
+
+ if (header->data_len + TB_DROM_DATA_START != size) {
+ tb_sw_warn(sw, "drom size mismatch, aborting\n");
+ goto err;
+ }
+
+ crc = tb_crc8((u8 *) &header->uid, 8);
+ if (crc != header->uid_crc8) {
+ tb_sw_warn(sw,
+ "drom uid crc8 mismatch (expected: %#x, got: %#x), aborting\n",
+ header->uid_crc8, crc);
+ goto err;
+ }
+ sw->uid = header->uid;
+
+ crc = tb_crc32(sw->drom + TB_DROM_DATA_START, header->data_len);
+ if (crc != header->data_crc32) {
+ tb_sw_warn(sw,
+ "drom data crc32 mismatch (expected: %#x, got: %#x), aborting\n",
+ header->data_crc32, crc);
+ goto err;
+ }
+
+ if (header->device_rom_revision > 1)
+ tb_sw_warn(sw, "drom device_rom_revision %#x unknown\n",
+ header->device_rom_revision);
+
+ return tb_drom_parse_entries(sw);
+err:
+ kfree(sw->drom);
+ return -EIO;
+
+}
diff --git a/drivers/thunderbolt/nhi.c b/drivers/thunderbolt/nhi.c
new file mode 100644
index 000000000000..c68fe1222c16
--- /dev/null
+++ b/drivers/thunderbolt/nhi.c
@@ -0,0 +1,675 @@
+/*
+ * Thunderbolt Cactus Ridge driver - NHI driver
+ *
+ * The NHI (native host interface) is the pci device that allows us to send and
+ * receive frames from the thunderbolt bus.
+ *
+ * Copyright (c) 2014 Andreas Noever <andreas.noever@gmail.com>
+ */
+
+#include <linux/pm_runtime.h>
+#include <linux/slab.h>
+#include <linux/errno.h>
+#include <linux/pci.h>
+#include <linux/interrupt.h>
+#include <linux/module.h>
+#include <linux/dmi.h>
+
+#include "nhi.h"
+#include "nhi_regs.h"
+#include "tb.h"
+
+#define RING_TYPE(ring) ((ring)->is_tx ? "TX ring" : "RX ring")
+
+
+static int ring_interrupt_index(struct tb_ring *ring)
+{
+ int bit = ring->hop;
+ if (!ring->is_tx)
+ bit += ring->nhi->hop_count;
+ return bit;
+}
+
+/**
+ * ring_interrupt_active() - activate/deactivate interrupts for a single ring
+ *
+ * ring->nhi->lock must be held.
+ */
+static void ring_interrupt_active(struct tb_ring *ring, bool active)
+{
+ int reg = REG_RING_INTERRUPT_BASE + ring_interrupt_index(ring) / 32;
+ int bit = ring_interrupt_index(ring) & 31;
+ int mask = 1 << bit;
+ u32 old, new;
+ old = ioread32(ring->nhi->iobase + reg);
+ if (active)
+ new = old | mask;
+ else
+ new = old & ~mask;
+
+ dev_info(&ring->nhi->pdev->dev,
+ "%s interrupt at register %#x bit %d (%#x -> %#x)\n",
+ active ? "enabling" : "disabling", reg, bit, old, new);
+
+ if (new == old)
+ dev_WARN(&ring->nhi->pdev->dev,
+ "interrupt for %s %d is already %s\n",
+ RING_TYPE(ring), ring->hop,
+ active ? "enabled" : "disabled");
+ iowrite32(new, ring->nhi->iobase + reg);
+}
+
+/**
+ * nhi_disable_interrupts() - disable interrupts for all rings
+ *
+ * Use only during init and shutdown.
+ */
+static void nhi_disable_interrupts(struct tb_nhi *nhi)
+{
+ int i = 0;
+ /* disable interrupts */
+ for (i = 0; i < RING_INTERRUPT_REG_COUNT(nhi); i++)
+ iowrite32(0, nhi->iobase + REG_RING_INTERRUPT_BASE + 4 * i);
+
+ /* clear interrupt status bits */
+ for (i = 0; i < RING_NOTIFY_REG_COUNT(nhi); i++)
+ ioread32(nhi->iobase + REG_RING_NOTIFY_BASE + 4 * i);
+}
+
+/* ring helper methods */
+
+static void __iomem *ring_desc_base(struct tb_ring *ring)
+{
+ void __iomem *io = ring->nhi->iobase;
+ io += ring->is_tx ? REG_TX_RING_BASE : REG_RX_RING_BASE;
+ io += ring->hop * 16;
+ return io;
+}
+
+static void __iomem *ring_options_base(struct tb_ring *ring)
+{
+ void __iomem *io = ring->nhi->iobase;
+ io += ring->is_tx ? REG_TX_OPTIONS_BASE : REG_RX_OPTIONS_BASE;
+ io += ring->hop * 32;
+ return io;
+}
+
+static void ring_iowrite16desc(struct tb_ring *ring, u32 value, u32 offset)
+{
+ iowrite16(value, ring_desc_base(ring) + offset);
+}
+
+static void ring_iowrite32desc(struct tb_ring *ring, u32 value, u32 offset)
+{
+ iowrite32(value, ring_desc_base(ring) + offset);
+}
+
+static void ring_iowrite64desc(struct tb_ring *ring, u64 value, u32 offset)
+{
+ iowrite32(value, ring_desc_base(ring) + offset);
+ iowrite32(value >> 32, ring_desc_base(ring) + offset + 4);
+}
+
+static void ring_iowrite32options(struct tb_ring *ring, u32 value, u32 offset)
+{
+ iowrite32(value, ring_options_base(ring) + offset);
+}
+
+static bool ring_full(struct tb_ring *ring)
+{
+ return ((ring->head + 1) % ring->size) == ring->tail;
+}
+
+static bool ring_empty(struct tb_ring *ring)
+{
+ return ring->head == ring->tail;
+}
+
+/**
+ * ring_write_descriptors() - post frames from ring->queue to the controller
+ *
+ * ring->lock is held.
+ */
+static void ring_write_descriptors(struct tb_ring *ring)
+{
+ struct ring_frame *frame, *n;
+ struct ring_desc *descriptor;
+ list_for_each_entry_safe(frame, n, &ring->queue, list) {
+ if (ring_full(ring))
+ break;
+ list_move_tail(&frame->list, &ring->in_flight);
+ descriptor = &ring->descriptors[ring->head];
+ descriptor->phys = frame->buffer_phy;
+ descriptor->time = 0;
+ descriptor->flags = RING_DESC_POSTED | RING_DESC_INTERRUPT;
+ if (ring->is_tx) {
+ descriptor->length = frame->size;
+ descriptor->eof = frame->eof;
+ descriptor->sof = frame->sof;
+ }
+ ring->head = (ring->head + 1) % ring->size;
+ ring_iowrite16desc(ring, ring->head, ring->is_tx ? 10 : 8);
+ }
+}
+
+/**
+ * ring_work() - progress completed frames
+ *
+ * If the ring is shutting down then all frames are marked as canceled and
+ * their callbacks are invoked.
+ *
+ * Otherwise we collect all completed frame from the ring buffer, write new
+ * frame to the ring buffer and invoke the callbacks for the completed frames.
+ */
+static void ring_work(struct work_struct *work)
+{
+ struct tb_ring *ring = container_of(work, typeof(*ring), work);
+ struct ring_frame *frame;
+ bool canceled = false;
+ LIST_HEAD(done);
+ mutex_lock(&ring->lock);
+
+ if (!ring->running) {
+ /* Move all frames to done and mark them as canceled. */
+ list_splice_tail_init(&ring->in_flight, &done);
+ list_splice_tail_init(&ring->queue, &done);
+ canceled = true;
+ goto invoke_callback;
+ }
+
+ while (!ring_empty(ring)) {
+ if (!(ring->descriptors[ring->tail].flags
+ & RING_DESC_COMPLETED))
+ break;
+ frame = list_first_entry(&ring->in_flight, typeof(*frame),
+ list);
+ list_move_tail(&frame->list, &done);
+ if (!ring->is_tx) {
+ frame->size = ring->descriptors[ring->tail].length;
+ frame->eof = ring->descriptors[ring->tail].eof;
+ frame->sof = ring->descriptors[ring->tail].sof;
+ frame->flags = ring->descriptors[ring->tail].flags;
+ if (frame->sof != 0)
+ dev_WARN(&ring->nhi->pdev->dev,
+ "%s %d got unexpected SOF: %#x\n",
+ RING_TYPE(ring), ring->hop,
+ frame->sof);
+ /*
+ * known flags:
+ * raw not enabled, interupt not set: 0x2=0010
+ * raw enabled: 0xa=1010
+ * raw not enabled: 0xb=1011
+ * partial frame (>MAX_FRAME_SIZE): 0xe=1110
+ */
+ if (frame->flags != 0xa)
+ dev_WARN(&ring->nhi->pdev->dev,
+ "%s %d got unexpected flags: %#x\n",
+ RING_TYPE(ring), ring->hop,
+ frame->flags);
+ }
+ ring->tail = (ring->tail + 1) % ring->size;
+ }
+ ring_write_descriptors(ring);
+
+invoke_callback:
+ mutex_unlock(&ring->lock); /* allow callbacks to schedule new work */
+ while (!list_empty(&done)) {
+ frame = list_first_entry(&done, typeof(*frame), list);
+ /*
+ * The callback may reenqueue or delete frame.
+ * Do not hold on to it.
+ */
+ list_del_init(&frame->list);
+ frame->callback(ring, frame, canceled);
+ }
+}
+
+int __ring_enqueue(struct tb_ring *ring, struct ring_frame *frame)
+{
+ int ret = 0;
+ mutex_lock(&ring->lock);
+ if (ring->running) {
+ list_add_tail(&frame->list, &ring->queue);
+ ring_write_descriptors(ring);
+ } else {
+ ret = -ESHUTDOWN;
+ }
+ mutex_unlock(&ring->lock);
+ return ret;
+}
+
+static struct tb_ring *ring_alloc(struct tb_nhi *nhi, u32 hop, int size,
+ bool transmit)
+{
+ struct tb_ring *ring = NULL;
+ dev_info(&nhi->pdev->dev, "allocating %s ring %d of size %d\n",
+ transmit ? "TX" : "RX", hop, size);
+
+ mutex_lock(&nhi->lock);
+ if (hop >= nhi->hop_count) {
+ dev_WARN(&nhi->pdev->dev, "invalid hop: %d\n", hop);
+ goto err;
+ }
+ if (transmit && nhi->tx_rings[hop]) {
+ dev_WARN(&nhi->pdev->dev, "TX hop %d already allocated\n", hop);
+ goto err;
+ } else if (!transmit && nhi->rx_rings[hop]) {
+ dev_WARN(&nhi->pdev->dev, "RX hop %d already allocated\n", hop);
+ goto err;
+ }
+ ring = kzalloc(sizeof(*ring), GFP_KERNEL);
+ if (!ring)
+ goto err;
+
+ mutex_init(&ring->lock);
+ INIT_LIST_HEAD(&ring->queue);
+ INIT_LIST_HEAD(&ring->in_flight);
+ INIT_WORK(&ring->work, ring_work);
+
+ ring->nhi = nhi;
+ ring->hop = hop;
+ ring->is_tx = transmit;
+ ring->size = size;
+ ring->head = 0;
+ ring->tail = 0;
+ ring->running = false;
+ ring->descriptors = dma_alloc_coherent(&ring->nhi->pdev->dev,
+ size * sizeof(*ring->descriptors),
+ &ring->descriptors_dma, GFP_KERNEL | __GFP_ZERO);
+ if (!ring->descriptors)
+ goto err;
+
+ if (transmit)
+ nhi->tx_rings[hop] = ring;
+ else
+ nhi->rx_rings[hop] = ring;
+ mutex_unlock(&nhi->lock);
+ return ring;
+
+err:
+ if (ring)
+ mutex_destroy(&ring->lock);
+ kfree(ring);
+ mutex_unlock(&nhi->lock);
+ return NULL;
+}
+
+struct tb_ring *ring_alloc_tx(struct tb_nhi *nhi, int hop, int size)
+{
+ return ring_alloc(nhi, hop, size, true);
+}
+
+struct tb_ring *ring_alloc_rx(struct tb_nhi *nhi, int hop, int size)
+{
+ return ring_alloc(nhi, hop, size, false);
+}
+
+/**
+ * ring_start() - enable a ring
+ *
+ * Must not be invoked in parallel with ring_stop().
+ */
+void ring_start(struct tb_ring *ring)
+{
+ mutex_lock(&ring->nhi->lock);
+ mutex_lock(&ring->lock);
+ if (ring->running) {
+ dev_WARN(&ring->nhi->pdev->dev, "ring already started\n");
+ goto err;
+ }
+ dev_info(&ring->nhi->pdev->dev, "starting %s %d\n",
+ RING_TYPE(ring), ring->hop);
+
+ ring_iowrite64desc(ring, ring->descriptors_dma, 0);
+ if (ring->is_tx) {
+ ring_iowrite32desc(ring, ring->size, 12);
+ ring_iowrite32options(ring, 0, 4); /* time releated ? */
+ ring_iowrite32options(ring,
+ RING_FLAG_ENABLE | RING_FLAG_RAW, 0);
+ } else {
+ ring_iowrite32desc(ring,
+ (TB_FRAME_SIZE << 16) | ring->size, 12);
+ ring_iowrite32options(ring, 0xffffffff, 4); /* SOF EOF mask */
+ ring_iowrite32options(ring,
+ RING_FLAG_ENABLE | RING_FLAG_RAW, 0);
+ }
+ ring_interrupt_active(ring, true);
+ ring->running = true;
+err:
+ mutex_unlock(&ring->lock);
+ mutex_unlock(&ring->nhi->lock);
+}
+
+
+/**
+ * ring_stop() - shutdown a ring
+ *
+ * Must not be invoked from a callback.
+ *
+ * This method will disable the ring. Further calls to ring_tx/ring_rx will
+ * return -ESHUTDOWN until ring_stop has been called.
+ *
+ * All enqueued frames will be canceled and their callbacks will be executed
+ * with frame->canceled set to true (on the callback thread). This method
+ * returns only after all callback invocations have finished.
+ */
+void ring_stop(struct tb_ring *ring)
+{
+ mutex_lock(&ring->nhi->lock);
+ mutex_lock(&ring->lock);
+ dev_info(&ring->nhi->pdev->dev, "stopping %s %d\n",
+ RING_TYPE(ring), ring->hop);
+ if (!ring->running) {
+ dev_WARN(&ring->nhi->pdev->dev, "%s %d already stopped\n",
+ RING_TYPE(ring), ring->hop);
+ goto err;
+ }
+ ring_interrupt_active(ring, false);
+
+ ring_iowrite32options(ring, 0, 0);
+ ring_iowrite64desc(ring, 0, 0);
+ ring_iowrite16desc(ring, 0, ring->is_tx ? 10 : 8);
+ ring_iowrite32desc(ring, 0, 12);
+ ring->head = 0;
+ ring->tail = 0;
+ ring->running = false;
+
+err:
+ mutex_unlock(&ring->lock);
+ mutex_unlock(&ring->nhi->lock);
+
+ /*
+ * schedule ring->work to invoke callbacks on all remaining frames.
+ */
+ schedule_work(&ring->work);
+ flush_work(&ring->work);
+}
+
+/*
+ * ring_free() - free ring
+ *
+ * When this method returns all invocations of ring->callback will have
+ * finished.
+ *
+ * Ring must be stopped.
+ *
+ * Must NOT be called from ring_frame->callback!
+ */
+void ring_free(struct tb_ring *ring)
+{
+ mutex_lock(&ring->nhi->lock);
+ /*
+ * Dissociate the ring from the NHI. This also ensures that
+ * nhi_interrupt_work cannot reschedule ring->work.
+ */
+ if (ring->is_tx)
+ ring->nhi->tx_rings[ring->hop] = NULL;
+ else
+ ring->nhi->rx_rings[ring->hop] = NULL;
+
+ if (ring->running) {
+ dev_WARN(&ring->nhi->pdev->dev, "%s %d still running\n",
+ RING_TYPE(ring), ring->hop);
+ }
+
+ dma_free_coherent(&ring->nhi->pdev->dev,
+ ring->size * sizeof(*ring->descriptors),
+ ring->descriptors, ring->descriptors_dma);
+
+ ring->descriptors = NULL;
+ ring->descriptors_dma = 0;
+
+
+ dev_info(&ring->nhi->pdev->dev,
+ "freeing %s %d\n",
+ RING_TYPE(ring),
+ ring->hop);
+
+ mutex_unlock(&ring->nhi->lock);
+ /**
+ * ring->work can no longer be scheduled (it is scheduled only by
+ * nhi_interrupt_work and ring_stop). Wait for it to finish before
+ * freeing the ring.
+ */
+ flush_work(&ring->work);
+ mutex_destroy(&ring->lock);
+ kfree(ring);
+}
+
+static void nhi_interrupt_work(struct work_struct *work)
+{
+ struct tb_nhi *nhi = container_of(work, typeof(*nhi), interrupt_work);
+ int value = 0; /* Suppress uninitialized usage warning. */
+ int bit;
+ int hop = -1;
+ int type = 0; /* current interrupt type 0: TX, 1: RX, 2: RX overflow */
+ struct tb_ring *ring;
+
+ mutex_lock(&nhi->lock);
+
+ /*
+ * Starting at REG_RING_NOTIFY_BASE there are three status bitfields
+ * (TX, RX, RX overflow). We iterate over the bits and read a new
+ * dwords as required. The registers are cleared on read.
+ */
+ for (bit = 0; bit < 3 * nhi->hop_count; bit++) {
+ if (bit % 32 == 0)
+ value = ioread32(nhi->iobase
+ + REG_RING_NOTIFY_BASE
+ + 4 * (bit / 32));
+ if (++hop == nhi->hop_count) {
+ hop = 0;
+ type++;
+ }
+ if ((value & (1 << (bit % 32))) == 0)
+ continue;
+ if (type == 2) {
+ dev_warn(&nhi->pdev->dev,
+ "RX overflow for ring %d\n",
+ hop);
+ continue;
+ }
+ if (type == 0)
+ ring = nhi->tx_rings[hop];
+ else
+ ring = nhi->rx_rings[hop];
+ if (ring == NULL) {
+ dev_warn(&nhi->pdev->dev,
+ "got interrupt for inactive %s ring %d\n",
+ type ? "RX" : "TX",
+ hop);
+ continue;
+ }
+ /* we do not check ring->running, this is done in ring->work */
+ schedule_work(&ring->work);
+ }
+ mutex_unlock(&nhi->lock);
+}
+
+static irqreturn_t nhi_msi(int irq, void *data)
+{
+ struct tb_nhi *nhi = data;
+ schedule_work(&nhi->interrupt_work);
+ return IRQ_HANDLED;
+}
+
+static int nhi_suspend_noirq(struct device *dev)
+{
+ struct pci_dev *pdev = to_pci_dev(dev);
+ struct tb *tb = pci_get_drvdata(pdev);
+ thunderbolt_suspend(tb);
+ return 0;
+}
+
+static int nhi_resume_noirq(struct device *dev)
+{
+ struct pci_dev *pdev = to_pci_dev(dev);
+ struct tb *tb = pci_get_drvdata(pdev);
+ thunderbolt_resume(tb);
+ return 0;
+}
+
+static void nhi_shutdown(struct tb_nhi *nhi)
+{
+ int i;
+ dev_info(&nhi->pdev->dev, "shutdown\n");
+
+ for (i = 0; i < nhi->hop_count; i++) {
+ if (nhi->tx_rings[i])
+ dev_WARN(&nhi->pdev->dev,
+ "TX ring %d is still active\n", i);
+ if (nhi->rx_rings[i])
+ dev_WARN(&nhi->pdev->dev,
+ "RX ring %d is still active\n", i);
+ }
+ nhi_disable_interrupts(nhi);
+ /*
+ * We have to release the irq before calling flush_work. Otherwise an
+ * already executing IRQ handler could call schedule_work again.
+ */
+ devm_free_irq(&nhi->pdev->dev, nhi->pdev->irq, nhi);
+ flush_work(&nhi->interrupt_work);
+ mutex_destroy(&nhi->lock);
+}
+
+static int nhi_probe(struct pci_dev *pdev, const struct pci_device_id *id)
+{
+ struct tb_nhi *nhi;
+ struct tb *tb;
+ int res;
+
+ res = pcim_enable_device(pdev);
+ if (res) {
+ dev_err(&pdev->dev, "cannot enable PCI device, aborting\n");
+ return res;
+ }
+
+ res = pci_enable_msi(pdev);
+ if (res) {
+ dev_err(&pdev->dev, "cannot enable MSI, aborting\n");
+ return res;
+ }
+
+ res = pcim_iomap_regions(pdev, 1 << 0, "thunderbolt");
+ if (res) {
+ dev_err(&pdev->dev, "cannot obtain PCI resources, aborting\n");
+ return res;
+ }
+
+ nhi = devm_kzalloc(&pdev->dev, sizeof(*nhi), GFP_KERNEL);
+ if (!nhi)
+ return -ENOMEM;
+
+ nhi->pdev = pdev;
+ /* cannot fail - table is allocated bin pcim_iomap_regions */
+ nhi->iobase = pcim_iomap_table(pdev)[0];
+ nhi->hop_count = ioread32(nhi->iobase + REG_HOP_COUNT) & 0x3ff;
+ if (nhi->hop_count != 12)
+ dev_warn(&pdev->dev, "unexpected hop count: %d\n",
+ nhi->hop_count);
+ INIT_WORK(&nhi->interrupt_work, nhi_interrupt_work);
+
+ nhi->tx_rings = devm_kcalloc(&pdev->dev, nhi->hop_count,
+ sizeof(*nhi->tx_rings), GFP_KERNEL);
+ nhi->rx_rings = devm_kcalloc(&pdev->dev, nhi->hop_count,
+ sizeof(*nhi->rx_rings), GFP_KERNEL);
+ if (!nhi->tx_rings || !nhi->rx_rings)
+ return -ENOMEM;
+
+ nhi_disable_interrupts(nhi); /* In case someone left them on. */
+ res = devm_request_irq(&pdev->dev, pdev->irq, nhi_msi,
+ IRQF_NO_SUSPEND, /* must work during _noirq */
+ "thunderbolt", nhi);
+ if (res) {
+ dev_err(&pdev->dev, "request_irq failed, aborting\n");
+ return res;
+ }
+
+ mutex_init(&nhi->lock);
+
+ pci_set_master(pdev);
+
+ /* magic value - clock related? */
+ iowrite32(3906250 / 10000, nhi->iobase + 0x38c00);
+
+ dev_info(&nhi->pdev->dev, "NHI initialized, starting thunderbolt\n");
+ tb = thunderbolt_alloc_and_start(nhi);
+ if (!tb) {
+ /*
+ * At this point the RX/TX rings might already have been
+ * activated. Do a proper shutdown.
+ */
+ nhi_shutdown(nhi);
+ return -EIO;
+ }
+ pci_set_drvdata(pdev, tb);
+
+ return 0;
+}
+
+static void nhi_remove(struct pci_dev *pdev)
+{
+ struct tb *tb = pci_get_drvdata(pdev);
+ struct tb_nhi *nhi = tb->nhi;
+ thunderbolt_shutdown_and_free(tb);
+ nhi_shutdown(nhi);
+}
+
+/*
+ * The tunneled pci bridges are siblings of us. Use resume_noirq to reenable
+ * the tunnels asap. A corresponding pci quirk blocks the downstream bridges
+ * resume_noirq until we are done.
+ */
+static const struct dev_pm_ops nhi_pm_ops = {
+ .suspend_noirq = nhi_suspend_noirq,
+ .resume_noirq = nhi_resume_noirq,
+ .freeze_noirq = nhi_suspend_noirq, /*
+ * we just disable hotplug, the
+ * pci-tunnels stay alive.
+ */
+ .restore_noirq = nhi_resume_noirq,
+};
+
+static struct pci_device_id nhi_ids[] = {
+ /*
+ * We have to specify class, the TB bridges use the same device and
+ * vendor (sub)id.
+ */
+ {
+ .class = PCI_CLASS_SYSTEM_OTHER << 8, .class_mask = ~0,
+ .vendor = PCI_VENDOR_ID_INTEL, .device = 0x1547,
+ .subvendor = 0x2222, .subdevice = 0x1111,
+ },
+ {
+ .class = PCI_CLASS_SYSTEM_OTHER << 8, .class_mask = ~0,
+ .vendor = PCI_VENDOR_ID_INTEL, .device = 0x156c,
+ .subvendor = 0x2222, .subdevice = 0x1111,
+ },
+ { 0,}
+};
+
+MODULE_DEVICE_TABLE(pci, nhi_ids);
+MODULE_LICENSE("GPL");
+
+static struct pci_driver nhi_driver = {
+ .name = "thunderbolt",
+ .id_table = nhi_ids,
+ .probe = nhi_probe,
+ .remove = nhi_remove,
+ .driver.pm = &nhi_pm_ops,
+};
+
+static int __init nhi_init(void)
+{
+ if (!dmi_match(DMI_BOARD_VENDOR, "Apple Inc."))
+ return -ENOSYS;
+ return pci_register_driver(&nhi_driver);
+}
+
+static void __exit nhi_unload(void)
+{
+ pci_unregister_driver(&nhi_driver);
+}
+
+module_init(nhi_init);
+module_exit(nhi_unload);
diff --git a/drivers/thunderbolt/nhi.h b/drivers/thunderbolt/nhi.h
new file mode 100644
index 000000000000..317242939b31
--- /dev/null
+++ b/drivers/thunderbolt/nhi.h
@@ -0,0 +1,114 @@
+/*
+ * Thunderbolt Cactus Ridge driver - NHI driver
+ *
+ * Copyright (c) 2014 Andreas Noever <andreas.noever@gmail.com>
+ */
+
+#ifndef DSL3510_H_
+#define DSL3510_H_
+
+#include <linux/mutex.h>
+#include <linux/workqueue.h>
+
+/**
+ * struct tb_nhi - thunderbolt native host interface
+ */
+struct tb_nhi {
+ struct mutex lock; /*
+ * Must be held during ring creation/destruction.
+ * Is acquired by interrupt_work when dispatching
+ * interrupts to individual rings.
+ **/
+ struct pci_dev *pdev;
+ void __iomem *iobase;
+ struct tb_ring **tx_rings;
+ struct tb_ring **rx_rings;
+ struct work_struct interrupt_work;
+ u32 hop_count; /* Number of rings (end point hops) supported by NHI. */
+};
+
+/**
+ * struct tb_ring - thunderbolt TX or RX ring associated with a NHI
+ */
+struct tb_ring {
+ struct mutex lock; /* must be acquired after nhi->lock */
+ struct tb_nhi *nhi;
+ int size;
+ int hop;
+ int head; /* write next descriptor here */
+ int tail; /* complete next descriptor here */
+ struct ring_desc *descriptors;
+ dma_addr_t descriptors_dma;
+ struct list_head queue;
+ struct list_head in_flight;
+ struct work_struct work;
+ bool is_tx:1; /* rx otherwise */
+ bool running:1;
+};
+
+struct ring_frame;
+typedef void (*ring_cb)(struct tb_ring*, struct ring_frame*, bool canceled);
+
+/**
+ * struct ring_frame - for use with ring_rx/ring_tx
+ */
+struct ring_frame {
+ dma_addr_t buffer_phy;
+ ring_cb callback;
+ struct list_head list;
+ u32 size:12; /* TX: in, RX: out*/
+ u32 flags:12; /* RX: out */
+ u32 eof:4; /* TX:in, RX: out */
+ u32 sof:4; /* TX:in, RX: out */
+};
+
+#define TB_FRAME_SIZE 0x100 /* minimum size for ring_rx */
+
+struct tb_ring *ring_alloc_tx(struct tb_nhi *nhi, int hop, int size);
+struct tb_ring *ring_alloc_rx(struct tb_nhi *nhi, int hop, int size);
+void ring_start(struct tb_ring *ring);
+void ring_stop(struct tb_ring *ring);
+void ring_free(struct tb_ring *ring);
+
+int __ring_enqueue(struct tb_ring *ring, struct ring_frame *frame);
+
+/**
+ * ring_rx() - enqueue a frame on an RX ring
+ *
+ * frame->buffer, frame->buffer_phy and frame->callback have to be set. The
+ * buffer must contain at least TB_FRAME_SIZE bytes.
+ *
+ * frame->callback will be invoked with frame->size, frame->flags, frame->eof,
+ * frame->sof set once the frame has been received.
+ *
+ * If ring_stop is called after the packet has been enqueued frame->callback
+ * will be called with canceled set to true.
+ *
+ * Return: Returns ESHUTDOWN if ring_stop has been called. Zero otherwise.
+ */
+static inline int ring_rx(struct tb_ring *ring, struct ring_frame *frame)
+{
+ WARN_ON(ring->is_tx);
+ return __ring_enqueue(ring, frame);
+}
+
+/**
+ * ring_tx() - enqueue a frame on an TX ring
+ *
+ * frame->buffer, frame->buffer_phy, frame->callback, frame->size, frame->eof
+ * and frame->sof have to be set.
+ *
+ * frame->callback will be invoked with once the frame has been transmitted.
+ *
+ * If ring_stop is called after the packet has been enqueued frame->callback
+ * will be called with canceled set to true.
+ *
+ * Return: Returns ESHUTDOWN if ring_stop has been called. Zero otherwise.
+ */
+static inline int ring_tx(struct tb_ring *ring, struct ring_frame *frame)
+{
+ WARN_ON(!ring->is_tx);
+ return __ring_enqueue(ring, frame);
+}
+
+#endif
diff --git a/drivers/thunderbolt/nhi_regs.h b/drivers/thunderbolt/nhi_regs.h
new file mode 100644
index 000000000000..86b996c702a0
--- /dev/null
+++ b/drivers/thunderbolt/nhi_regs.h
@@ -0,0 +1,101 @@
+/*
+ * Thunderbolt Cactus Ridge driver - NHI registers
+ *
+ * Copyright (c) 2014 Andreas Noever <andreas.noever@gmail.com>
+ */
+
+#ifndef DSL3510_REGS_H_
+#define DSL3510_REGS_H_
+
+#include <linux/types.h>
+
+enum ring_flags {
+ RING_FLAG_ISOCH_ENABLE = 1 << 27, /* TX only? */
+ RING_FLAG_E2E_FLOW_CONTROL = 1 << 28,
+ RING_FLAG_PCI_NO_SNOOP = 1 << 29,
+ RING_FLAG_RAW = 1 << 30, /* ignore EOF/SOF mask, include checksum */
+ RING_FLAG_ENABLE = 1 << 31,
+};
+
+enum ring_desc_flags {
+ RING_DESC_ISOCH = 0x1, /* TX only? */
+ RING_DESC_COMPLETED = 0x2, /* set by NHI */
+ RING_DESC_POSTED = 0x4, /* always set this */
+ RING_DESC_INTERRUPT = 0x8, /* request an interrupt on completion */
+};
+
+/**
+ * struct ring_desc - TX/RX ring entry
+ *
+ * For TX set length/eof/sof.
+ * For RX length/eof/sof are set by the NHI.
+ */
+struct ring_desc {
+ u64 phys;
+ u32 length:12;
+ u32 eof:4;
+ u32 sof:4;
+ enum ring_desc_flags flags:12;
+ u32 time; /* write zero */
+} __packed;
+
+/* NHI registers in bar 0 */
+
+/*
+ * 16 bytes per entry, one entry for every hop (REG_HOP_COUNT)
+ * 00: physical pointer to an array of struct ring_desc
+ * 08: ring tail (set by NHI)
+ * 10: ring head (index of first non posted descriptor)
+ * 12: descriptor count
+ */
+#define REG_TX_RING_BASE 0x00000
+
+/*
+ * 16 bytes per entry, one entry for every hop (REG_HOP_COUNT)
+ * 00: physical pointer to an array of struct ring_desc
+ * 08: ring head (index of first not posted descriptor)
+ * 10: ring tail (set by NHI)
+ * 12: descriptor count
+ * 14: max frame sizes (anything larger than 0x100 has no effect)
+ */
+#define REG_RX_RING_BASE 0x08000
+
+/*
+ * 32 bytes per entry, one entry for every hop (REG_HOP_COUNT)
+ * 00: enum_ring_flags
+ * 04: isoch time stamp ?? (write 0)
+ * ..: unknown
+ */
+#define REG_TX_OPTIONS_BASE 0x19800
+
+/*
+ * 32 bytes per entry, one entry for every hop (REG_HOP_COUNT)
+ * 00: enum ring_flags
+ * If RING_FLAG_E2E_FLOW_CONTROL is set then bits 13-23 must be set to
+ * the corresponding TX hop id.
+ * 04: EOF/SOF mask (ignored for RING_FLAG_RAW rings)
+ * ..: unknown
+ */
+#define REG_RX_OPTIONS_BASE 0x29800
+
+/*
+ * three bitfields: tx, rx, rx overflow
+ * Every bitfield contains one bit for every hop (REG_HOP_COUNT). Registers are
+ * cleared on read. New interrupts are fired only after ALL registers have been
+ * read (even those containing only disabled rings).
+ */
+#define REG_RING_NOTIFY_BASE 0x37800
+#define RING_NOTIFY_REG_COUNT(nhi) ((31 + 3 * nhi->hop_count) / 32)
+
+/*
+ * two bitfields: rx, tx
+ * Both bitfields contains one bit for every hop (REG_HOP_COUNT). To
+ * enable/disable interrupts set/clear the corresponding bits.
+ */
+#define REG_RING_INTERRUPT_BASE 0x38200
+#define RING_INTERRUPT_REG_COUNT(nhi) ((31 + 2 * nhi->hop_count) / 32)
+
+/* The last 11 bits contain the number of hops supported by the NHI port. */
+#define REG_HOP_COUNT 0x39640
+
+#endif
diff --git a/drivers/thunderbolt/path.c b/drivers/thunderbolt/path.c
new file mode 100644
index 000000000000..8fcf8a7b6c22
--- /dev/null
+++ b/drivers/thunderbolt/path.c
@@ -0,0 +1,215 @@
+/*
+ * Thunderbolt Cactus Ridge driver - path/tunnel functionality
+ *
+ * Copyright (c) 2014 Andreas Noever <andreas.noever@gmail.com>
+ */
+
+#include <linux/slab.h>
+#include <linux/errno.h>
+
+#include "tb.h"
+
+
+static void tb_dump_hop(struct tb_port *port, struct tb_regs_hop *hop)
+{
+ tb_port_info(port, " Hop through port %d to hop %d (%s)\n",
+ hop->out_port, hop->next_hop,
+ hop->enable ? "enabled" : "disabled");
+ tb_port_info(port, " Weight: %d Priority: %d Credits: %d Drop: %d\n",
+ hop->weight, hop->priority,
+ hop->initial_credits, hop->drop_packages);
+ tb_port_info(port, " Counter enabled: %d Counter index: %d\n",
+ hop->counter_enable, hop->counter);
+ tb_port_info(port, " Flow Control (In/Eg): %d/%d Shared Buffer (In/Eg): %d/%d\n",
+ hop->ingress_fc, hop->egress_fc,
+ hop->ingress_shared_buffer, hop->egress_shared_buffer);
+ tb_port_info(port, " Unknown1: %#x Unknown2: %#x Unknown3: %#x\n",
+ hop->unknown1, hop->unknown2, hop->unknown3);
+}
+
+/**
+ * tb_path_alloc() - allocate a thunderbolt path
+ *
+ * Return: Returns a tb_path on success or NULL on failure.
+ */
+struct tb_path *tb_path_alloc(struct tb *tb, int num_hops)
+{
+ struct tb_path *path = kzalloc(sizeof(*path), GFP_KERNEL);
+ if (!path)
+ return NULL;
+ path->hops = kcalloc(num_hops, sizeof(*path->hops), GFP_KERNEL);
+ if (!path->hops) {
+ kfree(path);
+ return NULL;
+ }
+ path->tb = tb;
+ path->path_length = num_hops;
+ return path;
+}
+
+/**
+ * tb_path_free() - free a deactivated path
+ */
+void tb_path_free(struct tb_path *path)
+{
+ if (path->activated) {
+ tb_WARN(path->tb, "trying to free an activated path\n")
+ return;
+ }
+ kfree(path->hops);
+ kfree(path);
+}
+
+static void __tb_path_deallocate_nfc(struct tb_path *path, int first_hop)
+{
+ int i, res;
+ for (i = first_hop; i < path->path_length; i++) {
+ res = tb_port_add_nfc_credits(path->hops[i].in_port,
+ -path->nfc_credits);
+ if (res)
+ tb_port_warn(path->hops[i].in_port,
+ "nfc credits deallocation failed for hop %d\n",
+ i);
+ }
+}
+
+static void __tb_path_deactivate_hops(struct tb_path *path, int first_hop)
+{
+ int i, res;
+ struct tb_regs_hop hop = { };
+ for (i = first_hop; i < path->path_length; i++) {
+ res = tb_port_write(path->hops[i].in_port, &hop, TB_CFG_HOPS,
+ 2 * path->hops[i].in_hop_index, 2);
+ if (res)
+ tb_port_warn(path->hops[i].in_port,
+ "hop deactivation failed for hop %d, index %d\n",
+ i, path->hops[i].in_hop_index);
+ }
+}
+
+void tb_path_deactivate(struct tb_path *path)
+{
+ if (!path->activated) {
+ tb_WARN(path->tb, "trying to deactivate an inactive path\n");
+ return;
+ }
+ tb_info(path->tb,
+ "deactivating path from %llx:%x to %llx:%x\n",
+ tb_route(path->hops[0].in_port->sw),
+ path->hops[0].in_port->port,
+ tb_route(path->hops[path->path_length - 1].out_port->sw),
+ path->hops[path->path_length - 1].out_port->port);
+ __tb_path_deactivate_hops(path, 0);
+ __tb_path_deallocate_nfc(path, 0);
+ path->activated = false;
+}
+
+/**
+ * tb_path_activate() - activate a path
+ *
+ * Activate a path starting with the last hop and iterating backwards. The
+ * caller must fill path->hops before calling tb_path_activate().
+ *
+ * Return: Returns 0 on success or an error code on failure.
+ */
+int tb_path_activate(struct tb_path *path)
+{
+ int i, res;
+ enum tb_path_port out_mask, in_mask;
+ if (path->activated) {
+ tb_WARN(path->tb, "trying to activate already activated path\n");
+ return -EINVAL;
+ }
+
+ tb_info(path->tb,
+ "activating path from %llx:%x to %llx:%x\n",
+ tb_route(path->hops[0].in_port->sw),
+ path->hops[0].in_port->port,
+ tb_route(path->hops[path->path_length - 1].out_port->sw),
+ path->hops[path->path_length - 1].out_port->port);
+
+ /* Clear counters. */
+ for (i = path->path_length - 1; i >= 0; i--) {
+ if (path->hops[i].in_counter_index == -1)
+ continue;
+ res = tb_port_clear_counter(path->hops[i].in_port,
+ path->hops[i].in_counter_index);
+ if (res)
+ goto err;
+ }
+
+ /* Add non flow controlled credits. */
+ for (i = path->path_length - 1; i >= 0; i--) {
+ res = tb_port_add_nfc_credits(path->hops[i].in_port,
+ path->nfc_credits);
+ if (res) {
+ __tb_path_deallocate_nfc(path, i);
+ goto err;
+ }
+ }
+
+ /* Activate hops. */
+ for (i = path->path_length - 1; i >= 0; i--) {
+ struct tb_regs_hop hop;
+
+ /* dword 0 */
+ hop.next_hop = path->hops[i].next_hop_index;
+ hop.out_port = path->hops[i].out_port->port;
+ /* TODO: figure out why these are good values */
+ hop.initial_credits = (i == path->path_length - 1) ? 16 : 7;
+ hop.unknown1 = 0;
+ hop.enable = 1;
+
+ /* dword 1 */
+ out_mask = (i == path->path_length - 1) ?
+ TB_PATH_DESTINATION : TB_PATH_INTERNAL;
+ in_mask = (i == 0) ? TB_PATH_SOURCE : TB_PATH_INTERNAL;
+ hop.weight = path->weight;
+ hop.unknown2 = 0;
+ hop.priority = path->priority;
+ hop.drop_packages = path->drop_packages;
+ hop.counter = path->hops[i].in_counter_index;
+ hop.counter_enable = path->hops[i].in_counter_index != -1;
+ hop.ingress_fc = path->ingress_fc_enable & in_mask;
+ hop.egress_fc = path->egress_fc_enable & out_mask;
+ hop.ingress_shared_buffer = path->ingress_shared_buffer
+ & in_mask;
+ hop.egress_shared_buffer = path->egress_shared_buffer
+ & out_mask;
+ hop.unknown3 = 0;
+
+ tb_port_info(path->hops[i].in_port, "Writing hop %d, index %d",
+ i, path->hops[i].in_hop_index);
+ tb_dump_hop(path->hops[i].in_port, &hop);
+ res = tb_port_write(path->hops[i].in_port, &hop, TB_CFG_HOPS,
+ 2 * path->hops[i].in_hop_index, 2);
+ if (res) {
+ __tb_path_deactivate_hops(path, i);
+ __tb_path_deallocate_nfc(path, 0);
+ goto err;
+ }
+ }
+ path->activated = true;
+ tb_info(path->tb, "path activation complete\n");
+ return 0;
+err:
+ tb_WARN(path->tb, "path activation failed\n");
+ return res;
+}
+
+/**
+ * tb_path_is_invalid() - check whether any ports on the path are invalid
+ *
+ * Return: Returns true if the path is invalid, false otherwise.
+ */
+bool tb_path_is_invalid(struct tb_path *path)
+{
+ int i = 0;
+ for (i = 0; i < path->path_length; i++) {
+ if (path->hops[i].in_port->sw->is_unplugged)
+ return true;
+ if (path->hops[i].out_port->sw->is_unplugged)
+ return true;
+ }
+ return false;
+}
diff --git a/drivers/thunderbolt/switch.c b/drivers/thunderbolt/switch.c
new file mode 100644
index 000000000000..aeb982969629
--- /dev/null
+++ b/drivers/thunderbolt/switch.c
@@ -0,0 +1,507 @@
+/*
+ * Thunderbolt Cactus Ridge driver - switch/port utility functions
+ *
+ * Copyright (c) 2014 Andreas Noever <andreas.noever@gmail.com>
+ */
+
+#include <linux/delay.h>
+#include <linux/slab.h>
+
+#include "tb.h"
+
+/* port utility functions */
+
+static const char *tb_port_type(struct tb_regs_port_header *port)
+{
+ switch (port->type >> 16) {
+ case 0:
+ switch ((u8) port->type) {
+ case 0:
+ return "Inactive";
+ case 1:
+ return "Port";
+ case 2:
+ return "NHI";
+ default:
+ return "unknown";
+ }
+ case 0x2:
+ return "Ethernet";
+ case 0x8:
+ return "SATA";
+ case 0xe:
+ return "DP/HDMI";
+ case 0x10:
+ return "PCIe";
+ case 0x20:
+ return "USB";
+ default:
+ return "unknown";
+ }
+}
+
+static void tb_dump_port(struct tb *tb, struct tb_regs_port_header *port)
+{
+ tb_info(tb,
+ " Port %d: %x:%x (Revision: %d, TB Version: %d, Type: %s (%#x))\n",
+ port->port_number, port->vendor_id, port->device_id,
+ port->revision, port->thunderbolt_version, tb_port_type(port),
+ port->type);
+ tb_info(tb, " Max hop id (in/out): %d/%d\n",
+ port->max_in_hop_id, port->max_out_hop_id);
+ tb_info(tb, " Max counters: %d\n", port->max_counters);
+ tb_info(tb, " NFC Credits: %#x\n", port->nfc_credits);
+}
+
+/**
+ * tb_port_state() - get connectedness state of a port
+ *
+ * The port must have a TB_CAP_PHY (i.e. it should be a real port).
+ *
+ * Return: Returns an enum tb_port_state on success or an error code on failure.
+ */
+static int tb_port_state(struct tb_port *port)
+{
+ struct tb_cap_phy phy;
+ int res;
+ if (port->cap_phy == 0) {
+ tb_port_WARN(port, "does not have a PHY\n");
+ return -EINVAL;
+ }
+ res = tb_port_read(port, &phy, TB_CFG_PORT, port->cap_phy, 2);
+ if (res)
+ return res;
+ return phy.state;
+}
+
+/**
+ * tb_wait_for_port() - wait for a port to become ready
+ *
+ * Wait up to 1 second for a port to reach state TB_PORT_UP. If
+ * wait_if_unplugged is set then we also wait if the port is in state
+ * TB_PORT_UNPLUGGED (it takes a while for the device to be registered after
+ * switch resume). Otherwise we only wait if a device is registered but the link
+ * has not yet been established.
+ *
+ * Return: Returns an error code on failure. Returns 0 if the port is not
+ * connected or failed to reach state TB_PORT_UP within one second. Returns 1
+ * if the port is connected and in state TB_PORT_UP.
+ */
+int tb_wait_for_port(struct tb_port *port, bool wait_if_unplugged)
+{
+ int retries = 10;
+ int state;
+ if (!port->cap_phy) {
+ tb_port_WARN(port, "does not have PHY\n");
+ return -EINVAL;
+ }
+ if (tb_is_upstream_port(port)) {
+ tb_port_WARN(port, "is the upstream port\n");
+ return -EINVAL;
+ }
+
+ while (retries--) {
+ state = tb_port_state(port);
+ if (state < 0)
+ return state;
+ if (state == TB_PORT_DISABLED) {
+ tb_port_info(port, "is disabled (state: 0)\n");
+ return 0;
+ }
+ if (state == TB_PORT_UNPLUGGED) {
+ if (wait_if_unplugged) {
+ /* used during resume */
+ tb_port_info(port,
+ "is unplugged (state: 7), retrying...\n");
+ msleep(100);
+ continue;
+ }
+ tb_port_info(port, "is unplugged (state: 7)\n");
+ return 0;
+ }
+ if (state == TB_PORT_UP) {
+ tb_port_info(port,
+ "is connected, link is up (state: 2)\n");
+ return 1;
+ }
+
+ /*
+ * After plug-in the state is TB_PORT_CONNECTING. Give it some
+ * time.
+ */
+ tb_port_info(port,
+ "is connected, link is not up (state: %d), retrying...\n",
+ state);
+ msleep(100);
+ }
+ tb_port_warn(port,
+ "failed to reach state TB_PORT_UP. Ignoring port...\n");
+ return 0;
+}
+
+/**
+ * tb_port_add_nfc_credits() - add/remove non flow controlled credits to port
+ *
+ * Change the number of NFC credits allocated to @port by @credits. To remove
+ * NFC credits pass a negative amount of credits.
+ *
+ * Return: Returns 0 on success or an error code on failure.
+ */
+int tb_port_add_nfc_credits(struct tb_port *port, int credits)
+{
+ if (credits == 0)
+ return 0;
+ tb_port_info(port,
+ "adding %#x NFC credits (%#x -> %#x)",
+ credits,
+ port->config.nfc_credits,
+ port->config.nfc_credits + credits);
+ port->config.nfc_credits += credits;
+ return tb_port_write(port, &port->config.nfc_credits,
+ TB_CFG_PORT, 4, 1);
+}
+
+/**
+ * tb_port_clear_counter() - clear a counter in TB_CFG_COUNTER
+ *
+ * Return: Returns 0 on success or an error code on failure.
+ */
+int tb_port_clear_counter(struct tb_port *port, int counter)
+{
+ u32 zero[3] = { 0, 0, 0 };
+ tb_port_info(port, "clearing counter %d\n", counter);
+ return tb_port_write(port, zero, TB_CFG_COUNTERS, 3 * counter, 3);
+}
+
+/**
+ * tb_init_port() - initialize a port
+ *
+ * This is a helper method for tb_switch_alloc. Does not check or initialize
+ * any downstream switches.
+ *
+ * Return: Returns 0 on success or an error code on failure.
+ */
+static int tb_init_port(struct tb_port *port)
+{
+ int res;
+ int cap;
+
+ res = tb_port_read(port, &port->config, TB_CFG_PORT, 0, 8);
+ if (res)
+ return res;
+
+ /* Port 0 is the switch itself and has no PHY. */
+ if (port->config.type == TB_TYPE_PORT && port->port != 0) {
+ cap = tb_find_cap(port, TB_CFG_PORT, TB_CAP_PHY);
+
+ if (cap > 0)
+ port->cap_phy = cap;
+ else
+ tb_port_WARN(port, "non switch port without a PHY\n");
+ }
+
+ tb_dump_port(port->sw->tb, &port->config);
+
+ /* TODO: Read dual link port, DP port and more from EEPROM. */
+ return 0;
+
+}
+
+/* switch utility functions */
+
+static void tb_dump_switch(struct tb *tb, struct tb_regs_switch_header *sw)
+{
+ tb_info(tb,
+ " Switch: %x:%x (Revision: %d, TB Version: %d)\n",
+ sw->vendor_id, sw->device_id, sw->revision,
+ sw->thunderbolt_version);
+ tb_info(tb, " Max Port Number: %d\n", sw->max_port_number);
+ tb_info(tb, " Config:\n");
+ tb_info(tb,
+ " Upstream Port Number: %d Depth: %d Route String: %#llx Enabled: %d, PlugEventsDelay: %dms\n",
+ sw->upstream_port_number, sw->depth,
+ (((u64) sw->route_hi) << 32) | sw->route_lo,
+ sw->enabled, sw->plug_events_delay);
+ tb_info(tb,
+ " unknown1: %#x unknown4: %#x\n",
+ sw->__unknown1, sw->__unknown4);
+}
+
+/**
+ * reset_switch() - reconfigure route, enable and send TB_CFG_PKG_RESET
+ *
+ * Return: Returns 0 on success or an error code on failure.
+ */
+int tb_switch_reset(struct tb *tb, u64 route)
+{
+ struct tb_cfg_result res;
+ struct tb_regs_switch_header header = {
+ header.route_hi = route >> 32,
+ header.route_lo = route,
+ header.enabled = true,
+ };
+ tb_info(tb, "resetting switch at %llx\n", route);
+ res.err = tb_cfg_write(tb->ctl, ((u32 *) &header) + 2, route,
+ 0, 2, 2, 2);
+ if (res.err)
+ return res.err;
+ res = tb_cfg_reset(tb->ctl, route, TB_CFG_DEFAULT_TIMEOUT);
+ if (res.err > 0)
+ return -EIO;
+ return res.err;
+}
+
+struct tb_switch *get_switch_at_route(struct tb_switch *sw, u64 route)
+{
+ u8 next_port = route; /*
+ * Routes use a stride of 8 bits,
+ * eventhough a port index has 6 bits at most.
+ * */
+ if (route == 0)
+ return sw;
+ if (next_port > sw->config.max_port_number)
+ return NULL;
+ if (tb_is_upstream_port(&sw->ports[next_port]))
+ return NULL;
+ if (!sw->ports[next_port].remote)
+ return NULL;
+ return get_switch_at_route(sw->ports[next_port].remote->sw,
+ route >> TB_ROUTE_SHIFT);
+}
+
+/**
+ * tb_plug_events_active() - enable/disable plug events on a switch
+ *
+ * Also configures a sane plug_events_delay of 255ms.
+ *
+ * Return: Returns 0 on success or an error code on failure.
+ */
+static int tb_plug_events_active(struct tb_switch *sw, bool active)
+{
+ u32 data;
+ int res;
+
+ sw->config.plug_events_delay = 0xff;
+ res = tb_sw_write(sw, ((u32 *) &sw->config) + 4, TB_CFG_SWITCH, 4, 1);
+ if (res)
+ return res;
+
+ res = tb_sw_read(sw, &data, TB_CFG_SWITCH, sw->cap_plug_events + 1, 1);
+ if (res)
+ return res;
+
+ if (active) {
+ data = data & 0xFFFFFF83;
+ switch (sw->config.device_id) {
+ case 0x1513:
+ case 0x151a:
+ case 0x1549:
+ break;
+ default:
+ data |= 4;
+ }
+ } else {
+ data = data | 0x7c;
+ }
+ return tb_sw_write(sw, &data, TB_CFG_SWITCH,
+ sw->cap_plug_events + 1, 1);
+}
+
+
+/**
+ * tb_switch_free() - free a tb_switch and all downstream switches
+ */
+void tb_switch_free(struct tb_switch *sw)
+{
+ int i;
+ /* port 0 is the switch itself and never has a remote */
+ for (i = 1; i <= sw->config.max_port_number; i++) {
+ if (tb_is_upstream_port(&sw->ports[i]))
+ continue;
+ if (sw->ports[i].remote)
+ tb_switch_free(sw->ports[i].remote->sw);
+ sw->ports[i].remote = NULL;
+ }
+
+ if (!sw->is_unplugged)
+ tb_plug_events_active(sw, false);
+
+ kfree(sw->ports);
+ kfree(sw->drom);
+ kfree(sw);
+}
+
+/**
+ * tb_switch_alloc() - allocate and initialize a switch
+ *
+ * Return: Returns a NULL on failure.
+ */
+struct tb_switch *tb_switch_alloc(struct tb *tb, u64 route)
+{
+ int i;
+ int cap;
+ struct tb_switch *sw;
+ int upstream_port = tb_cfg_get_upstream_port(tb->ctl, route);
+ if (upstream_port < 0)
+ return NULL;
+
+ sw = kzalloc(sizeof(*sw), GFP_KERNEL);
+ if (!sw)
+ return NULL;
+
+ sw->tb = tb;
+ if (tb_cfg_read(tb->ctl, &sw->config, route, 0, 2, 0, 5))
+ goto err;
+ tb_info(tb,
+ "initializing Switch at %#llx (depth: %d, up port: %d)\n",
+ route, tb_route_length(route), upstream_port);
+ tb_info(tb, "old switch config:\n");
+ tb_dump_switch(tb, &sw->config);
+
+ /* configure switch */
+ sw->config.upstream_port_number = upstream_port;
+ sw->config.depth = tb_route_length(route);
+ sw->config.route_lo = route;
+ sw->config.route_hi = route >> 32;
+ sw->config.enabled = 1;
+ /* from here on we may use the tb_sw_* functions & macros */
+
+ if (sw->config.vendor_id != 0x8086)
+ tb_sw_warn(sw, "unknown switch vendor id %#x\n",
+ sw->config.vendor_id);
+
+ if (sw->config.device_id != 0x1547 && sw->config.device_id != 0x1549)
+ tb_sw_warn(sw, "unsupported switch device id %#x\n",
+ sw->config.device_id);
+
+ /* upload configuration */
+ if (tb_sw_write(sw, 1 + (u32 *) &sw->config, TB_CFG_SWITCH, 1, 3))
+ goto err;
+
+ /* initialize ports */
+ sw->ports = kcalloc(sw->config.max_port_number + 1, sizeof(*sw->ports),
+ GFP_KERNEL);
+ if (!sw->ports)
+ goto err;
+
+ for (i = 0; i <= sw->config.max_port_number; i++) {
+ /* minimum setup for tb_find_cap and tb_drom_read to work */
+ sw->ports[i].sw = sw;
+ sw->ports[i].port = i;
+ }
+
+ cap = tb_find_cap(&sw->ports[0], TB_CFG_SWITCH, TB_CAP_PLUG_EVENTS);
+ if (cap < 0) {
+ tb_sw_warn(sw, "cannot find TB_CAP_PLUG_EVENTS aborting\n");
+ goto err;
+ }
+ sw->cap_plug_events = cap;
+
+ /* read drom */
+ if (tb_drom_read(sw))
+ tb_sw_warn(sw, "tb_eeprom_read_rom failed, continuing\n");
+ tb_sw_info(sw, "uid: %#llx\n", sw->uid);
+
+ for (i = 0; i <= sw->config.max_port_number; i++) {
+ if (sw->ports[i].disabled) {
+ tb_port_info(&sw->ports[i], "disabled by eeprom\n");
+ continue;
+ }
+ if (tb_init_port(&sw->ports[i]))
+ goto err;
+ }
+
+ /* TODO: I2C, IECS, link controller */
+
+ if (tb_plug_events_active(sw, true))
+ goto err;
+
+ return sw;
+err:
+ kfree(sw->ports);
+ kfree(sw->drom);
+ kfree(sw);
+ return NULL;
+}
+
+/**
+ * tb_sw_set_unpplugged() - set is_unplugged on switch and downstream switches
+ */
+void tb_sw_set_unpplugged(struct tb_switch *sw)
+{
+ int i;
+ if (sw == sw->tb->root_switch) {
+ tb_sw_WARN(sw, "cannot unplug root switch\n");
+ return;
+ }
+ if (sw->is_unplugged) {
+ tb_sw_WARN(sw, "is_unplugged already set\n");
+ return;
+ }
+ sw->is_unplugged = true;
+ for (i = 0; i <= sw->config.max_port_number; i++) {
+ if (!tb_is_upstream_port(&sw->ports[i]) && sw->ports[i].remote)
+ tb_sw_set_unpplugged(sw->ports[i].remote->sw);
+ }
+}
+
+int tb_switch_resume(struct tb_switch *sw)
+{
+ int i, err;
+ u64 uid;
+ tb_sw_info(sw, "resuming switch\n");
+
+ err = tb_drom_read_uid_only(sw, &uid);
+ if (err) {
+ tb_sw_warn(sw, "uid read failed\n");
+ return err;
+ }
+ if (sw->uid != uid) {
+ tb_sw_info(sw,
+ "changed while suspended (uid %#llx -> %#llx)\n",
+ sw->uid, uid);
+ return -ENODEV;
+ }
+
+ /* upload configuration */
+ err = tb_sw_write(sw, 1 + (u32 *) &sw->config, TB_CFG_SWITCH, 1, 3);
+ if (err)
+ return err;
+
+ err = tb_plug_events_active(sw, true);
+ if (err)
+ return err;
+
+ /* check for surviving downstream switches */
+ for (i = 1; i <= sw->config.max_port_number; i++) {
+ struct tb_port *port = &sw->ports[i];
+ if (tb_is_upstream_port(port))
+ continue;
+ if (!port->remote)
+ continue;
+ if (tb_wait_for_port(port, true) <= 0
+ || tb_switch_resume(port->remote->sw)) {
+ tb_port_warn(port,
+ "lost during suspend, disconnecting\n");
+ tb_sw_set_unpplugged(port->remote->sw);
+ }
+ }
+ return 0;
+}
+
+void tb_switch_suspend(struct tb_switch *sw)
+{
+ int i, err;
+ err = tb_plug_events_active(sw, false);
+ if (err)
+ return;
+
+ for (i = 1; i <= sw->config.max_port_number; i++) {
+ if (!tb_is_upstream_port(&sw->ports[i]) && sw->ports[i].remote)
+ tb_switch_suspend(sw->ports[i].remote->sw);
+ }
+ /*
+ * TODO: invoke tb_cfg_prepare_to_sleep here? does not seem to have any
+ * effect?
+ */
+}
diff --git a/drivers/thunderbolt/tb.c b/drivers/thunderbolt/tb.c
new file mode 100644
index 000000000000..d2c3fe346e91
--- /dev/null
+++ b/drivers/thunderbolt/tb.c
@@ -0,0 +1,436 @@
+/*
+ * Thunderbolt Cactus Ridge driver - bus logic (NHI independent)
+ *
+ * Copyright (c) 2014 Andreas Noever <andreas.noever@gmail.com>
+ */
+
+#include <linux/slab.h>
+#include <linux/errno.h>
+#include <linux/delay.h>
+
+#include "tb.h"
+#include "tb_regs.h"
+#include "tunnel_pci.h"
+
+
+/* enumeration & hot plug handling */
+
+
+static void tb_scan_port(struct tb_port *port);
+
+/**
+ * tb_scan_switch() - scan for and initialize downstream switches
+ */
+static void tb_scan_switch(struct tb_switch *sw)
+{
+ int i;
+ for (i = 1; i <= sw->config.max_port_number; i++)
+ tb_scan_port(&sw->ports[i]);
+}
+
+/**
+ * tb_scan_port() - check for and initialize switches below port
+ */
+static void tb_scan_port(struct tb_port *port)
+{
+ struct tb_switch *sw;
+ if (tb_is_upstream_port(port))
+ return;
+ if (port->config.type != TB_TYPE_PORT)
+ return;
+ if (port->dual_link_port && port->link_nr)
+ return; /*
+ * Downstream switch is reachable through two ports.
+ * Only scan on the primary port (link_nr == 0).
+ */
+ if (tb_wait_for_port(port, false) <= 0)
+ return;
+ if (port->remote) {
+ tb_port_WARN(port, "port already has a remote!\n");
+ return;
+ }
+ sw = tb_switch_alloc(port->sw->tb, tb_downstream_route(port));
+ if (!sw)
+ return;
+ port->remote = tb_upstream_port(sw);
+ tb_upstream_port(sw)->remote = port;
+ tb_scan_switch(sw);
+}
+
+/**
+ * tb_free_invalid_tunnels() - destroy tunnels of devices that have gone away
+ */
+static void tb_free_invalid_tunnels(struct tb *tb)
+{
+ struct tb_pci_tunnel *tunnel;
+ struct tb_pci_tunnel *n;
+ list_for_each_entry_safe(tunnel, n, &tb->tunnel_list, list)
+ {
+ if (tb_pci_is_invalid(tunnel)) {
+ tb_pci_deactivate(tunnel);
+ tb_pci_free(tunnel);
+ }
+ }
+}
+
+/**
+ * tb_free_unplugged_children() - traverse hierarchy and free unplugged switches
+ */
+static void tb_free_unplugged_children(struct tb_switch *sw)
+{
+ int i;
+ for (i = 1; i <= sw->config.max_port_number; i++) {
+ struct tb_port *port = &sw->ports[i];
+ if (tb_is_upstream_port(port))
+ continue;
+ if (!port->remote)
+ continue;
+ if (port->remote->sw->is_unplugged) {
+ tb_switch_free(port->remote->sw);
+ port->remote = NULL;
+ } else {
+ tb_free_unplugged_children(port->remote->sw);
+ }
+ }
+}
+
+
+/**
+ * find_pci_up_port() - return the first PCIe up port on @sw or NULL
+ */
+static struct tb_port *tb_find_pci_up_port(struct tb_switch *sw)
+{
+ int i;
+ for (i = 1; i <= sw->config.max_port_number; i++)
+ if (sw->ports[i].config.type == TB_TYPE_PCIE_UP)
+ return &sw->ports[i];
+ return NULL;
+}
+
+/**
+ * find_unused_down_port() - return the first inactive PCIe down port on @sw
+ */
+static struct tb_port *tb_find_unused_down_port(struct tb_switch *sw)
+{
+ int i;
+ int cap;
+ int res;
+ int data;
+ for (i = 1; i <= sw->config.max_port_number; i++) {
+ if (tb_is_upstream_port(&sw->ports[i]))
+ continue;
+ if (sw->ports[i].config.type != TB_TYPE_PCIE_DOWN)
+ continue;
+ cap = tb_find_cap(&sw->ports[i], TB_CFG_PORT, TB_CAP_PCIE);
+ if (cap <= 0)
+ continue;
+ res = tb_port_read(&sw->ports[i], &data, TB_CFG_PORT, cap, 1);
+ if (res < 0)
+ continue;
+ if (data & 0x80000000)
+ continue;
+ return &sw->ports[i];
+ }
+ return NULL;
+}
+
+/**
+ * tb_activate_pcie_devices() - scan for and activate PCIe devices
+ *
+ * This method is somewhat ad hoc. For now it only supports one device
+ * per port and only devices at depth 1.
+ */
+static void tb_activate_pcie_devices(struct tb *tb)
+{
+ int i;
+ int cap;
+ u32 data;
+ struct tb_switch *sw;
+ struct tb_port *up_port;
+ struct tb_port *down_port;
+ struct tb_pci_tunnel *tunnel;
+ /* scan for pcie devices at depth 1*/
+ for (i = 1; i <= tb->root_switch->config.max_port_number; i++) {
+ if (tb_is_upstream_port(&tb->root_switch->ports[i]))
+ continue;
+ if (tb->root_switch->ports[i].config.type != TB_TYPE_PORT)
+ continue;
+ if (!tb->root_switch->ports[i].remote)
+ continue;
+ sw = tb->root_switch->ports[i].remote->sw;
+ up_port = tb_find_pci_up_port(sw);
+ if (!up_port) {
+ tb_sw_info(sw, "no PCIe devices found, aborting\n");
+ continue;
+ }
+
+ /* check whether port is already activated */
+ cap = tb_find_cap(up_port, TB_CFG_PORT, TB_CAP_PCIE);
+ if (cap <= 0)
+ continue;
+ if (tb_port_read(up_port, &data, TB_CFG_PORT, cap, 1))
+ continue;
+ if (data & 0x80000000) {
+ tb_port_info(up_port,
+ "PCIe port already activated, aborting\n");
+ continue;
+ }
+
+ down_port = tb_find_unused_down_port(tb->root_switch);
+ if (!down_port) {
+ tb_port_info(up_port,
+ "All PCIe down ports are occupied, aborting\n");
+ continue;
+ }
+ tunnel = tb_pci_alloc(tb, up_port, down_port);
+ if (!tunnel) {
+ tb_port_info(up_port,
+ "PCIe tunnel allocation failed, aborting\n");
+ continue;
+ }
+
+ if (tb_pci_activate(tunnel)) {
+ tb_port_info(up_port,
+ "PCIe tunnel activation failed, aborting\n");
+ tb_pci_free(tunnel);
+ }
+
+ }
+}
+
+/* hotplug handling */
+
+struct tb_hotplug_event {
+ struct work_struct work;
+ struct tb *tb;
+ u64 route;
+ u8 port;
+ bool unplug;
+};
+
+/**
+ * tb_handle_hotplug() - handle hotplug event
+ *
+ * Executes on tb->wq.
+ */
+static void tb_handle_hotplug(struct work_struct *work)
+{
+ struct tb_hotplug_event *ev = container_of(work, typeof(*ev), work);
+ struct tb *tb = ev->tb;
+ struct tb_switch *sw;
+ struct tb_port *port;
+ mutex_lock(&tb->lock);
+ if (!tb->hotplug_active)
+ goto out; /* during init, suspend or shutdown */
+
+ sw = get_switch_at_route(tb->root_switch, ev->route);
+ if (!sw) {
+ tb_warn(tb,
+ "hotplug event from non existent switch %llx:%x (unplug: %d)\n",
+ ev->route, ev->port, ev->unplug);
+ goto out;
+ }
+ if (ev->port > sw->config.max_port_number) {
+ tb_warn(tb,
+ "hotplug event from non existent port %llx:%x (unplug: %d)\n",
+ ev->route, ev->port, ev->unplug);
+ goto out;
+ }
+ port = &sw->ports[ev->port];
+ if (tb_is_upstream_port(port)) {
+ tb_warn(tb,
+ "hotplug event for upstream port %llx:%x (unplug: %d)\n",
+ ev->route, ev->port, ev->unplug);
+ goto out;
+ }
+ if (ev->unplug) {
+ if (port->remote) {
+ tb_port_info(port, "unplugged\n");
+ tb_sw_set_unpplugged(port->remote->sw);
+ tb_free_invalid_tunnels(tb);
+ tb_switch_free(port->remote->sw);
+ port->remote = NULL;
+ } else {
+ tb_port_info(port,
+ "got unplug event for disconnected port, ignoring\n");
+ }
+ } else if (port->remote) {
+ tb_port_info(port,
+ "got plug event for connected port, ignoring\n");
+ } else {
+ tb_port_info(port, "hotplug: scanning\n");
+ tb_scan_port(port);
+ if (!port->remote) {
+ tb_port_info(port, "hotplug: no switch found\n");
+ } else if (port->remote->sw->config.depth > 1) {
+ tb_sw_warn(port->remote->sw,
+ "hotplug: chaining not supported\n");
+ } else {
+ tb_sw_info(port->remote->sw,
+ "hotplug: activating pcie devices\n");
+ tb_activate_pcie_devices(tb);
+ }
+ }
+out:
+ mutex_unlock(&tb->lock);
+ kfree(ev);
+}
+
+/**
+ * tb_schedule_hotplug_handler() - callback function for the control channel
+ *
+ * Delegates to tb_handle_hotplug.
+ */
+static void tb_schedule_hotplug_handler(void *data, u64 route, u8 port,
+ bool unplug)
+{
+ struct tb *tb = data;
+ struct tb_hotplug_event *ev = kmalloc(sizeof(*ev), GFP_KERNEL);
+ if (!ev)
+ return;
+ INIT_WORK(&ev->work, tb_handle_hotplug);
+ ev->tb = tb;
+ ev->route = route;
+ ev->port = port;
+ ev->unplug = unplug;
+ queue_work(tb->wq, &ev->work);
+}
+
+/**
+ * thunderbolt_shutdown_and_free() - shutdown everything
+ *
+ * Free all switches and the config channel.
+ *
+ * Used in the error path of thunderbolt_alloc_and_start.
+ */
+void thunderbolt_shutdown_and_free(struct tb *tb)
+{
+ struct tb_pci_tunnel *tunnel;
+ struct tb_pci_tunnel *n;
+
+ mutex_lock(&tb->lock);
+
+ /* tunnels are only present after everything has been initialized */
+ list_for_each_entry_safe(tunnel, n, &tb->tunnel_list, list) {
+ tb_pci_deactivate(tunnel);
+ tb_pci_free(tunnel);
+ }
+
+ if (tb->root_switch)
+ tb_switch_free(tb->root_switch);
+ tb->root_switch = NULL;
+
+ if (tb->ctl) {
+ tb_ctl_stop(tb->ctl);
+ tb_ctl_free(tb->ctl);
+ }
+ tb->ctl = NULL;
+ tb->hotplug_active = false; /* signal tb_handle_hotplug to quit */
+
+ /* allow tb_handle_hotplug to acquire the lock */
+ mutex_unlock(&tb->lock);
+ if (tb->wq) {
+ flush_workqueue(tb->wq);
+ destroy_workqueue(tb->wq);
+ tb->wq = NULL;
+ }
+ mutex_destroy(&tb->lock);
+ kfree(tb);
+}
+
+/**
+ * thunderbolt_alloc_and_start() - setup the thunderbolt bus
+ *
+ * Allocates a tb_cfg control channel, initializes the root switch, enables
+ * plug events and activates pci devices.
+ *
+ * Return: Returns NULL on error.
+ */
+struct tb *thunderbolt_alloc_and_start(struct tb_nhi *nhi)
+{
+ struct tb *tb;
+
+ BUILD_BUG_ON(sizeof(struct tb_regs_switch_header) != 5 * 4);
+ BUILD_BUG_ON(sizeof(struct tb_regs_port_header) != 8 * 4);
+ BUILD_BUG_ON(sizeof(struct tb_regs_hop) != 2 * 4);
+
+ tb = kzalloc(sizeof(*tb), GFP_KERNEL);
+ if (!tb)
+ return NULL;
+
+ tb->nhi = nhi;
+ mutex_init(&tb->lock);
+ mutex_lock(&tb->lock);
+ INIT_LIST_HEAD(&tb->tunnel_list);
+
+ tb->wq = alloc_ordered_workqueue("thunderbolt", 0);
+ if (!tb->wq)
+ goto err_locked;
+
+ tb->ctl = tb_ctl_alloc(tb->nhi, tb_schedule_hotplug_handler, tb);
+ if (!tb->ctl)
+ goto err_locked;
+ /*
+ * tb_schedule_hotplug_handler may be called as soon as the config
+ * channel is started. Thats why we have to hold the lock here.
+ */
+ tb_ctl_start(tb->ctl);
+
+ tb->root_switch = tb_switch_alloc(tb, 0);
+ if (!tb->root_switch)
+ goto err_locked;
+
+ /* Full scan to discover devices added before the driver was loaded. */
+ tb_scan_switch(tb->root_switch);
+ tb_activate_pcie_devices(tb);
+
+ /* Allow tb_handle_hotplug to progress events */
+ tb->hotplug_active = true;
+ mutex_unlock(&tb->lock);
+ return tb;
+
+err_locked:
+ mutex_unlock(&tb->lock);
+ thunderbolt_shutdown_and_free(tb);
+ return NULL;
+}
+
+void thunderbolt_suspend(struct tb *tb)
+{
+ tb_info(tb, "suspending...\n");
+ mutex_lock(&tb->lock);
+ tb_switch_suspend(tb->root_switch);
+ tb_ctl_stop(tb->ctl);
+ tb->hotplug_active = false; /* signal tb_handle_hotplug to quit */
+ mutex_unlock(&tb->lock);
+ tb_info(tb, "suspend finished\n");
+}
+
+void thunderbolt_resume(struct tb *tb)
+{
+ struct tb_pci_tunnel *tunnel, *n;
+ tb_info(tb, "resuming...\n");
+ mutex_lock(&tb->lock);
+ tb_ctl_start(tb->ctl);
+
+ /* remove any pci devices the firmware might have setup */
+ tb_switch_reset(tb, 0);
+
+ tb_switch_resume(tb->root_switch);
+ tb_free_invalid_tunnels(tb);
+ tb_free_unplugged_children(tb->root_switch);
+ list_for_each_entry_safe(tunnel, n, &tb->tunnel_list, list)
+ tb_pci_restart(tunnel);
+ if (!list_empty(&tb->tunnel_list)) {
+ /*
+ * the pcie links need some time to get going.
+ * 100ms works for me...
+ */
+ tb_info(tb, "tunnels restarted, sleeping for 100ms\n");
+ msleep(100);
+ }
+ /* Allow tb_handle_hotplug to progress events */
+ tb->hotplug_active = true;
+ mutex_unlock(&tb->lock);
+ tb_info(tb, "resume finished\n");
+}
diff --git a/drivers/thunderbolt/tb.h b/drivers/thunderbolt/tb.h
new file mode 100644
index 000000000000..8b0d7cf2b6d6
--- /dev/null
+++ b/drivers/thunderbolt/tb.h
@@ -0,0 +1,271 @@
+/*
+ * Thunderbolt Cactus Ridge driver - bus logic (NHI independent)
+ *
+ * Copyright (c) 2014 Andreas Noever <andreas.noever@gmail.com>
+ */
+
+#ifndef TB_H_
+#define TB_H_
+
+#include <linux/pci.h>
+
+#include "tb_regs.h"
+#include "ctl.h"
+
+/**
+ * struct tb_switch - a thunderbolt switch
+ */
+struct tb_switch {
+ struct tb_regs_switch_header config;
+ struct tb_port *ports;
+ struct tb *tb;
+ u64 uid;
+ int cap_plug_events; /* offset, zero if not found */
+ bool is_unplugged; /* unplugged, will go away */
+ u8 *drom;
+};
+
+/**
+ * struct tb_port - a thunderbolt port, part of a tb_switch
+ */
+struct tb_port {
+ struct tb_regs_port_header config;
+ struct tb_switch *sw;
+ struct tb_port *remote; /* remote port, NULL if not connected */
+ int cap_phy; /* offset, zero if not found */
+ u8 port; /* port number on switch */
+ bool disabled; /* disabled by eeprom */
+ struct tb_port *dual_link_port;
+ u8 link_nr:1;
+};
+
+/**
+ * struct tb_path_hop - routing information for a tb_path
+ *
+ * Hop configuration is always done on the IN port of a switch.
+ * in_port and out_port have to be on the same switch. Packets arriving on
+ * in_port with "hop" = in_hop_index will get routed to through out_port. The
+ * next hop to take (on out_port->remote) is determined by next_hop_index.
+ *
+ * in_counter_index is the index of a counter (in TB_CFG_COUNTERS) on the in
+ * port.
+ */
+struct tb_path_hop {
+ struct tb_port *in_port;
+ struct tb_port *out_port;
+ int in_hop_index;
+ int in_counter_index; /* write -1 to disable counters for this hop. */
+ int next_hop_index;
+};
+
+/**
+ * enum tb_path_port - path options mask
+ */
+enum tb_path_port {
+ TB_PATH_NONE = 0,
+ TB_PATH_SOURCE = 1, /* activate on the first hop (out of src) */
+ TB_PATH_INTERNAL = 2, /* activate on other hops (not the first/last) */
+ TB_PATH_DESTINATION = 4, /* activate on the last hop (into dst) */
+ TB_PATH_ALL = 7,
+};
+
+/**
+ * struct tb_path - a unidirectional path between two ports
+ *
+ * A path consists of a number of hops (see tb_path_hop). To establish a PCIe
+ * tunnel two paths have to be created between the two PCIe ports.
+ *
+ */
+struct tb_path {
+ struct tb *tb;
+ int nfc_credits; /* non flow controlled credits */
+ enum tb_path_port ingress_shared_buffer;
+ enum tb_path_port egress_shared_buffer;
+ enum tb_path_port ingress_fc_enable;
+ enum tb_path_port egress_fc_enable;
+
+ int priority:3;
+ int weight:4;
+ bool drop_packages;
+ bool activated;
+ struct tb_path_hop *hops;
+ int path_length; /* number of hops */
+};
+
+
+/**
+ * struct tb - main thunderbolt bus structure
+ */
+struct tb {
+ struct mutex lock; /*
+ * Big lock. Must be held when accessing cfg or
+ * any struct tb_switch / struct tb_port.
+ */
+ struct tb_nhi *nhi;
+ struct tb_ctl *ctl;
+ struct workqueue_struct *wq; /* ordered workqueue for plug events */
+ struct tb_switch *root_switch;
+ struct list_head tunnel_list; /* list of active PCIe tunnels */
+ bool hotplug_active; /*
+ * tb_handle_hotplug will stop progressing plug
+ * events and exit if this is not set (it needs to
+ * acquire the lock one more time). Used to drain
+ * wq after cfg has been paused.
+ */
+
+};
+
+/* helper functions & macros */
+
+/**
+ * tb_upstream_port() - return the upstream port of a switch
+ *
+ * Every switch has an upstream port (for the root switch it is the NHI).
+ *
+ * During switch alloc/init tb_upstream_port()->remote may be NULL, even for
+ * non root switches (on the NHI port remote is always NULL).
+ *
+ * Return: Returns the upstream port of the switch.
+ */
+static inline struct tb_port *tb_upstream_port(struct tb_switch *sw)
+{
+ return &sw->ports[sw->config.upstream_port_number];
+}
+
+static inline u64 tb_route(struct tb_switch *sw)
+{
+ return ((u64) sw->config.route_hi) << 32 | sw->config.route_lo;
+}
+
+static inline int tb_sw_read(struct tb_switch *sw, void *buffer,
+ enum tb_cfg_space space, u32 offset, u32 length)
+{
+ return tb_cfg_read(sw->tb->ctl,
+ buffer,
+ tb_route(sw),
+ 0,
+ space,
+ offset,
+ length);
+}
+
+static inline int tb_sw_write(struct tb_switch *sw, void *buffer,
+ enum tb_cfg_space space, u32 offset, u32 length)
+{
+ return tb_cfg_write(sw->tb->ctl,
+ buffer,
+ tb_route(sw),
+ 0,
+ space,
+ offset,
+ length);
+}
+
+static inline int tb_port_read(struct tb_port *port, void *buffer,
+ enum tb_cfg_space space, u32 offset, u32 length)
+{
+ return tb_cfg_read(port->sw->tb->ctl,
+ buffer,
+ tb_route(port->sw),
+ port->port,
+ space,
+ offset,
+ length);
+}
+
+static inline int tb_port_write(struct tb_port *port, void *buffer,
+ enum tb_cfg_space space, u32 offset, u32 length)
+{
+ return tb_cfg_write(port->sw->tb->ctl,
+ buffer,
+ tb_route(port->sw),
+ port->port,
+ space,
+ offset,
+ length);
+}
+
+#define tb_err(tb, fmt, arg...) dev_err(&(tb)->nhi->pdev->dev, fmt, ## arg)
+#define tb_WARN(tb, fmt, arg...) dev_WARN(&(tb)->nhi->pdev->dev, fmt, ## arg)
+#define tb_warn(tb, fmt, arg...) dev_warn(&(tb)->nhi->pdev->dev, fmt, ## arg)
+#define tb_info(tb, fmt, arg...) dev_info(&(tb)->nhi->pdev->dev, fmt, ## arg)
+
+
+#define __TB_SW_PRINT(level, sw, fmt, arg...) \
+ do { \
+ struct tb_switch *__sw = (sw); \
+ level(__sw->tb, "%llx: " fmt, \
+ tb_route(__sw), ## arg); \
+ } while (0)
+#define tb_sw_WARN(sw, fmt, arg...) __TB_SW_PRINT(tb_WARN, sw, fmt, ##arg)
+#define tb_sw_warn(sw, fmt, arg...) __TB_SW_PRINT(tb_warn, sw, fmt, ##arg)
+#define tb_sw_info(sw, fmt, arg...) __TB_SW_PRINT(tb_info, sw, fmt, ##arg)
+
+
+#define __TB_PORT_PRINT(level, _port, fmt, arg...) \
+ do { \
+ struct tb_port *__port = (_port); \
+ level(__port->sw->tb, "%llx:%x: " fmt, \
+ tb_route(__port->sw), __port->port, ## arg); \
+ } while (0)
+#define tb_port_WARN(port, fmt, arg...) \
+ __TB_PORT_PRINT(tb_WARN, port, fmt, ##arg)
+#define tb_port_warn(port, fmt, arg...) \
+ __TB_PORT_PRINT(tb_warn, port, fmt, ##arg)
+#define tb_port_info(port, fmt, arg...) \
+ __TB_PORT_PRINT(tb_info, port, fmt, ##arg)
+
+
+struct tb *thunderbolt_alloc_and_start(struct tb_nhi *nhi);
+void thunderbolt_shutdown_and_free(struct tb *tb);
+void thunderbolt_suspend(struct tb *tb);
+void thunderbolt_resume(struct tb *tb);
+
+struct tb_switch *tb_switch_alloc(struct tb *tb, u64 route);
+void tb_switch_free(struct tb_switch *sw);
+void tb_switch_suspend(struct tb_switch *sw);
+int tb_switch_resume(struct tb_switch *sw);
+int tb_switch_reset(struct tb *tb, u64 route);
+void tb_sw_set_unpplugged(struct tb_switch *sw);
+struct tb_switch *get_switch_at_route(struct tb_switch *sw, u64 route);
+
+int tb_wait_for_port(struct tb_port *port, bool wait_if_unplugged);
+int tb_port_add_nfc_credits(struct tb_port *port, int credits);
+int tb_port_clear_counter(struct tb_port *port, int counter);
+
+int tb_find_cap(struct tb_port *port, enum tb_cfg_space space, enum tb_cap cap);
+
+struct tb_path *tb_path_alloc(struct tb *tb, int num_hops);
+void tb_path_free(struct tb_path *path);
+int tb_path_activate(struct tb_path *path);
+void tb_path_deactivate(struct tb_path *path);
+bool tb_path_is_invalid(struct tb_path *path);
+
+int tb_drom_read(struct tb_switch *sw);
+int tb_drom_read_uid_only(struct tb_switch *sw, u64 *uid);
+
+
+static inline int tb_route_length(u64 route)
+{
+ return (fls64(route) + TB_ROUTE_SHIFT - 1) / TB_ROUTE_SHIFT;
+}
+
+static inline bool tb_is_upstream_port(struct tb_port *port)
+{
+ return port == tb_upstream_port(port->sw);
+}
+
+/**
+ * tb_downstream_route() - get route to downstream switch
+ *
+ * Port must not be the upstream port (otherwise a loop is created).
+ *
+ * Return: Returns a route to the switch behind @port.
+ */
+static inline u64 tb_downstream_route(struct tb_port *port)
+{
+ return tb_route(port->sw)
+ | ((u64) port->port << (port->sw->config.depth * 8));
+}
+
+#endif
diff --git a/drivers/thunderbolt/tb_regs.h b/drivers/thunderbolt/tb_regs.h
new file mode 100644
index 000000000000..6577af75d9dc
--- /dev/null
+++ b/drivers/thunderbolt/tb_regs.h
@@ -0,0 +1,213 @@
+/*
+ * Thunderbolt Cactus Ridge driver - Port/Switch config area registers
+ *
+ * Every thunderbolt device consists (logically) of a switch with multiple
+ * ports. Every port contains up to four config regions (HOPS, PORT, SWITCH,
+ * COUNTERS) which are used to configure the device.
+ *
+ * Copyright (c) 2014 Andreas Noever <andreas.noever@gmail.com>
+ */
+
+#ifndef _TB_REGS
+#define _TB_REGS
+
+#include <linux/types.h>
+
+
+#define TB_ROUTE_SHIFT 8 /* number of bits in a port entry of a route */
+
+
+/*
+ * TODO: should be 63? But we do not know how to receive frames larger than 256
+ * bytes at the frame level. (header + checksum = 16, 60*4 = 240)
+ */
+#define TB_MAX_CONFIG_RW_LENGTH 60
+
+enum tb_cap {
+ TB_CAP_PHY = 0x0001,
+ TB_CAP_TIME1 = 0x0003,
+ TB_CAP_PCIE = 0x0004,
+ TB_CAP_I2C = 0x0005,
+ TB_CAP_PLUG_EVENTS = 0x0105, /* also EEPROM */
+ TB_CAP_TIME2 = 0x0305,
+ TB_CAL_IECS = 0x0405,
+ TB_CAP_LINK_CONTROLLER = 0x0605, /* also IECS */
+};
+
+enum tb_port_state {
+ TB_PORT_DISABLED = 0, /* tb_cap_phy.disable == 1 */
+ TB_PORT_CONNECTING = 1, /* retry */
+ TB_PORT_UP = 2,
+ TB_PORT_UNPLUGGED = 7,
+};
+
+/* capability headers */
+
+struct tb_cap_basic {
+ u8 next;
+ /* enum tb_cap cap:8; prevent "narrower than values of its type" */
+ u8 cap; /* if cap == 0x05 then we have a extended capability */
+} __packed;
+
+struct tb_cap_extended_short {
+ u8 next; /* if next and length are zero then we have a long cap */
+ enum tb_cap cap:16;
+ u8 length;
+} __packed;
+
+struct tb_cap_extended_long {
+ u8 zero1;
+ enum tb_cap cap:16;
+ u8 zero2;
+ u16 next;
+ u16 length;
+} __packed;
+
+/* capabilities */
+
+struct tb_cap_link_controller {
+ struct tb_cap_extended_long cap_header;
+ u32 count:4; /* number of link controllers */
+ u32 unknown1:4;
+ u32 base_offset:8; /*
+ * offset (into this capability) of the configuration
+ * area of the first link controller
+ */
+ u32 length:12; /* link controller configuration area length */
+ u32 unknown2:4; /* TODO check that length is correct */
+} __packed;
+
+struct tb_cap_phy {
+ struct tb_cap_basic cap_header;
+ u32 unknown1:16;
+ u32 unknown2:14;
+ bool disable:1;
+ u32 unknown3:11;
+ enum tb_port_state state:4;
+ u32 unknown4:2;
+} __packed;
+
+struct tb_eeprom_ctl {
+ bool clock:1; /* send pulse to transfer one bit */
+ bool access_low:1; /* set to 0 before access */
+ bool data_out:1; /* to eeprom */
+ bool data_in:1; /* from eeprom */
+ bool access_high:1; /* set to 1 before access */
+ bool not_present:1; /* should be 0 */
+ bool unknown1:1;
+ bool present:1; /* should be 1 */
+ u32 unknown2:24;
+} __packed;
+
+struct tb_cap_plug_events {
+ struct tb_cap_extended_short cap_header;
+ u32 __unknown1:2;
+ u32 plug_events:5;
+ u32 __unknown2:25;
+ u32 __unknown3;
+ u32 __unknown4;
+ struct tb_eeprom_ctl eeprom_ctl;
+ u32 __unknown5[7];
+ u32 drom_offset; /* 32 bit register, but eeprom addresses are 16 bit */
+} __packed;
+
+/* device headers */
+
+/* Present on port 0 in TB_CFG_SWITCH at address zero. */
+struct tb_regs_switch_header {
+ /* DWORD 0 */
+ u16 vendor_id;
+ u16 device_id;
+ /* DWORD 1 */
+ u32 first_cap_offset:8;
+ u32 upstream_port_number:6;
+ u32 max_port_number:6;
+ u32 depth:3;
+ u32 __unknown1:1;
+ u32 revision:8;
+ /* DWORD 2 */
+ u32 route_lo;
+ /* DWORD 3 */
+ u32 route_hi:31;
+ bool enabled:1;
+ /* DWORD 4 */
+ u32 plug_events_delay:8; /*
+ * RW, pause between plug events in
+ * milliseconds. Writing 0x00 is interpreted
+ * as 255ms.
+ */
+ u32 __unknown4:16;
+ u32 thunderbolt_version:8;
+} __packed;
+
+enum tb_port_type {
+ TB_TYPE_INACTIVE = 0x000000,
+ TB_TYPE_PORT = 0x000001,
+ TB_TYPE_NHI = 0x000002,
+ /* TB_TYPE_ETHERNET = 0x020000, lower order bits are not known */
+ /* TB_TYPE_SATA = 0x080000, lower order bits are not known */
+ TB_TYPE_DP_HDMI_IN = 0x0e0101,
+ TB_TYPE_DP_HDMI_OUT = 0x0e0102,
+ TB_TYPE_PCIE_DOWN = 0x100101,
+ TB_TYPE_PCIE_UP = 0x100102,
+ /* TB_TYPE_USB = 0x200000, lower order bits are not known */
+};
+
+/* Present on every port in TB_CF_PORT at address zero. */
+struct tb_regs_port_header {
+ /* DWORD 0 */
+ u16 vendor_id;
+ u16 device_id;
+ /* DWORD 1 */
+ u32 first_cap_offset:8;
+ u32 max_counters:11;
+ u32 __unknown1:5;
+ u32 revision:8;
+ /* DWORD 2 */
+ enum tb_port_type type:24;
+ u32 thunderbolt_version:8;
+ /* DWORD 3 */
+ u32 __unknown2:20;
+ u32 port_number:6;
+ u32 __unknown3:6;
+ /* DWORD 4 */
+ u32 nfc_credits;
+ /* DWORD 5 */
+ u32 max_in_hop_id:11;
+ u32 max_out_hop_id:11;
+ u32 __unkown4:10;
+ /* DWORD 6 */
+ u32 __unknown5;
+ /* DWORD 7 */
+ u32 __unknown6;
+
+} __packed;
+
+/* Hop register from TB_CFG_HOPS. 8 byte per entry. */
+struct tb_regs_hop {
+ /* DWORD 0 */
+ u32 next_hop:11; /*
+ * hop to take after sending the packet through
+ * out_port (on the incoming port of the next switch)
+ */
+ u32 out_port:6; /* next port of the path (on the same switch) */
+ u32 initial_credits:8;
+ u32 unknown1:6; /* set to zero */
+ bool enable:1;
+
+ /* DWORD 1 */
+ u32 weight:4;
+ u32 unknown2:4; /* set to zero */
+ u32 priority:3;
+ bool drop_packages:1;
+ u32 counter:11; /* index into TB_CFG_COUNTERS on this port */
+ bool counter_enable:1;
+ bool ingress_fc:1;
+ bool egress_fc:1;
+ bool ingress_shared_buffer:1;
+ bool egress_shared_buffer:1;
+ u32 unknown3:4; /* set to zero */
+} __packed;
+
+
+#endif
diff --git a/drivers/thunderbolt/tunnel_pci.c b/drivers/thunderbolt/tunnel_pci.c
new file mode 100644
index 000000000000..baf1cd370446
--- /dev/null
+++ b/drivers/thunderbolt/tunnel_pci.c
@@ -0,0 +1,232 @@
+/*
+ * Thunderbolt Cactus Ridge driver - PCIe tunnel
+ *
+ * Copyright (c) 2014 Andreas Noever <andreas.noever@gmail.com>
+ */
+
+#include <linux/slab.h>
+#include <linux/list.h>
+
+#include "tunnel_pci.h"
+#include "tb.h"
+
+#define __TB_TUNNEL_PRINT(level, tunnel, fmt, arg...) \
+ do { \
+ struct tb_pci_tunnel *__tunnel = (tunnel); \
+ level(__tunnel->tb, "%llx:%x <-> %llx:%x (PCI): " fmt, \
+ tb_route(__tunnel->down_port->sw), \
+ __tunnel->down_port->port, \
+ tb_route(__tunnel->up_port->sw), \
+ __tunnel->up_port->port, \
+ ## arg); \
+ } while (0)
+
+#define tb_tunnel_WARN(tunnel, fmt, arg...) \
+ __TB_TUNNEL_PRINT(tb_WARN, tunnel, fmt, ##arg)
+#define tb_tunnel_warn(tunnel, fmt, arg...) \
+ __TB_TUNNEL_PRINT(tb_warn, tunnel, fmt, ##arg)
+#define tb_tunnel_info(tunnel, fmt, arg...) \
+ __TB_TUNNEL_PRINT(tb_info, tunnel, fmt, ##arg)
+
+static void tb_pci_init_path(struct tb_path *path)
+{
+ path->egress_fc_enable = TB_PATH_SOURCE | TB_PATH_INTERNAL;
+ path->egress_shared_buffer = TB_PATH_NONE;
+ path->ingress_fc_enable = TB_PATH_ALL;
+ path->ingress_shared_buffer = TB_PATH_NONE;
+ path->priority = 3;
+ path->weight = 1;
+ path->drop_packages = 0;
+ path->nfc_credits = 0;
+}
+
+/**
+ * tb_pci_alloc() - allocate a pci tunnel
+ *
+ * Allocate a PCI tunnel. The ports must be of type TB_TYPE_PCIE_UP and
+ * TB_TYPE_PCIE_DOWN.
+ *
+ * Currently only paths consisting of two hops are supported (that is the
+ * ports must be on "adjacent" switches).
+ *
+ * The paths are hard-coded to use hop 8 (the only working hop id available on
+ * my thunderbolt devices). Therefore at most ONE path per device may be
+ * activated.
+ *
+ * Return: Returns a tb_pci_tunnel on success or NULL on failure.
+ */
+struct tb_pci_tunnel *tb_pci_alloc(struct tb *tb, struct tb_port *up,
+ struct tb_port *down)
+{
+ struct tb_pci_tunnel *tunnel = kzalloc(sizeof(*tunnel), GFP_KERNEL);
+ if (!tunnel)
+ goto err;
+ tunnel->tb = tb;
+ tunnel->down_port = down;
+ tunnel->up_port = up;
+ INIT_LIST_HEAD(&tunnel->list);
+ tunnel->path_to_up = tb_path_alloc(up->sw->tb, 2);
+ if (!tunnel->path_to_up)
+ goto err;
+ tunnel->path_to_down = tb_path_alloc(up->sw->tb, 2);
+ if (!tunnel->path_to_down)
+ goto err;
+ tb_pci_init_path(tunnel->path_to_up);
+ tb_pci_init_path(tunnel->path_to_down);
+
+ tunnel->path_to_up->hops[0].in_port = down;
+ tunnel->path_to_up->hops[0].in_hop_index = 8;
+ tunnel->path_to_up->hops[0].in_counter_index = -1;
+ tunnel->path_to_up->hops[0].out_port = tb_upstream_port(up->sw)->remote;
+ tunnel->path_to_up->hops[0].next_hop_index = 8;
+
+ tunnel->path_to_up->hops[1].in_port = tb_upstream_port(up->sw);
+ tunnel->path_to_up->hops[1].in_hop_index = 8;
+ tunnel->path_to_up->hops[1].in_counter_index = -1;
+ tunnel->path_to_up->hops[1].out_port = up;
+ tunnel->path_to_up->hops[1].next_hop_index = 8;
+
+ tunnel->path_to_down->hops[0].in_port = up;
+ tunnel->path_to_down->hops[0].in_hop_index = 8;
+ tunnel->path_to_down->hops[0].in_counter_index = -1;
+ tunnel->path_to_down->hops[0].out_port = tb_upstream_port(up->sw);
+ tunnel->path_to_down->hops[0].next_hop_index = 8;
+
+ tunnel->path_to_down->hops[1].in_port =
+ tb_upstream_port(up->sw)->remote;
+ tunnel->path_to_down->hops[1].in_hop_index = 8;
+ tunnel->path_to_down->hops[1].in_counter_index = -1;
+ tunnel->path_to_down->hops[1].out_port = down;
+ tunnel->path_to_down->hops[1].next_hop_index = 8;
+ return tunnel;
+
+err:
+ if (tunnel) {
+ if (tunnel->path_to_down)
+ tb_path_free(tunnel->path_to_down);
+ if (tunnel->path_to_up)
+ tb_path_free(tunnel->path_to_up);
+ kfree(tunnel);
+ }
+ return NULL;
+}
+
+/**
+ * tb_pci_free() - free a tunnel
+ *
+ * The tunnel must have been deactivated.
+ */
+void tb_pci_free(struct tb_pci_tunnel *tunnel)
+{
+ if (tunnel->path_to_up->activated || tunnel->path_to_down->activated) {
+ tb_tunnel_WARN(tunnel, "trying to free an activated tunnel\n");
+ return;
+ }
+ tb_path_free(tunnel->path_to_up);
+ tb_path_free(tunnel->path_to_down);
+ kfree(tunnel);
+}
+
+/**
+ * tb_pci_is_invalid - check whether an activated path is still valid
+ */
+bool tb_pci_is_invalid(struct tb_pci_tunnel *tunnel)
+{
+ WARN_ON(!tunnel->path_to_up->activated);
+ WARN_ON(!tunnel->path_to_down->activated);
+
+ return tb_path_is_invalid(tunnel->path_to_up)
+ || tb_path_is_invalid(tunnel->path_to_down);
+}
+
+/**
+ * tb_pci_port_active() - activate/deactivate PCI capability
+ *
+ * Return: Returns 0 on success or an error code on failure.
+ */
+static int tb_pci_port_active(struct tb_port *port, bool active)
+{
+ u32 word = active ? 0x80000000 : 0x0;
+ int cap = tb_find_cap(port, TB_CFG_PORT, TB_CAP_PCIE);
+ if (cap <= 0) {
+ tb_port_warn(port, "TB_CAP_PCIE not found: %d\n", cap);
+ return cap ? cap : -ENXIO;
+ }
+ return tb_port_write(port, &word, TB_CFG_PORT, cap, 1);
+}
+
+/**
+ * tb_pci_restart() - activate a tunnel after a hardware reset
+ */
+int tb_pci_restart(struct tb_pci_tunnel *tunnel)
+{
+ int res;
+ tunnel->path_to_up->activated = false;
+ tunnel->path_to_down->activated = false;
+
+ tb_tunnel_info(tunnel, "activating\n");
+
+ res = tb_path_activate(tunnel->path_to_up);
+ if (res)
+ goto err;
+ res = tb_path_activate(tunnel->path_to_down);
+ if (res)
+ goto err;
+
+ res = tb_pci_port_active(tunnel->down_port, true);
+ if (res)
+ goto err;
+
+ res = tb_pci_port_active(tunnel->up_port, true);
+ if (res)
+ goto err;
+ return 0;
+err:
+ tb_tunnel_warn(tunnel, "activation failed\n");
+ tb_pci_deactivate(tunnel);
+ return res;
+}
+
+/**
+ * tb_pci_activate() - activate a tunnel
+ *
+ * Return: Returns 0 on success or an error code on failure.
+ */
+int tb_pci_activate(struct tb_pci_tunnel *tunnel)
+{
+ int res;
+ if (tunnel->path_to_up->activated || tunnel->path_to_down->activated) {
+ tb_tunnel_WARN(tunnel,
+ "trying to activate an already activated tunnel\n");
+ return -EINVAL;
+ }
+
+ res = tb_pci_restart(tunnel);
+ if (res)
+ return res;
+
+ list_add(&tunnel->list, &tunnel->tb->tunnel_list);
+ return 0;
+}
+
+
+
+/**
+ * tb_pci_deactivate() - deactivate a tunnel
+ */
+void tb_pci_deactivate(struct tb_pci_tunnel *tunnel)
+{
+ tb_tunnel_info(tunnel, "deactivating\n");
+ /*
+ * TODO: enable reset by writing 0x04000000 to TB_CAP_PCIE + 1 on up
+ * port. Seems to have no effect?
+ */
+ tb_pci_port_active(tunnel->up_port, false);
+ tb_pci_port_active(tunnel->down_port, false);
+ if (tunnel->path_to_down->activated)
+ tb_path_deactivate(tunnel->path_to_down);
+ if (tunnel->path_to_up->activated)
+ tb_path_deactivate(tunnel->path_to_up);
+ list_del_init(&tunnel->list);
+}
+
diff --git a/drivers/thunderbolt/tunnel_pci.h b/drivers/thunderbolt/tunnel_pci.h
new file mode 100644
index 000000000000..a67f93c140fa
--- /dev/null
+++ b/drivers/thunderbolt/tunnel_pci.h
@@ -0,0 +1,30 @@
+/*
+ * Thunderbolt Cactus Ridge driver - PCIe tunnel
+ *
+ * Copyright (c) 2014 Andreas Noever <andreas.noever@gmail.com>
+ */
+
+#ifndef TB_PCI_H_
+#define TB_PCI_H_
+
+#include "tb.h"
+
+struct tb_pci_tunnel {
+ struct tb *tb;
+ struct tb_port *up_port;
+ struct tb_port *down_port;
+ struct tb_path *path_to_up;
+ struct tb_path *path_to_down;
+ struct list_head list;
+};
+
+struct tb_pci_tunnel *tb_pci_alloc(struct tb *tb, struct tb_port *up,
+ struct tb_port *down);
+void tb_pci_free(struct tb_pci_tunnel *tunnel);
+int tb_pci_activate(struct tb_pci_tunnel *tunnel);
+int tb_pci_restart(struct tb_pci_tunnel *tunnel);
+void tb_pci_deactivate(struct tb_pci_tunnel *tunnel);
+bool tb_pci_is_invalid(struct tb_pci_tunnel *tunnel);
+
+#endif
+
diff --git a/drivers/uio/uio_pruss.c b/drivers/uio/uio_pruss.c
index 96c4a19b1918..c28d6e2e3df2 100644
--- a/drivers/uio/uio_pruss.c
+++ b/drivers/uio/uio_pruss.c
@@ -91,8 +91,7 @@ static irqreturn_t pruss_handler(int irq, struct uio_info *info)
return IRQ_HANDLED;
}
-static void pruss_cleanup(struct platform_device *dev,
- struct uio_pruss_dev *gdev)
+static void pruss_cleanup(struct device *dev, struct uio_pruss_dev *gdev)
{
int cnt;
struct uio_info *p = gdev->info;
@@ -103,7 +102,7 @@ static void pruss_cleanup(struct platform_device *dev,
}
iounmap(gdev->prussio_vaddr);
if (gdev->ddr_vaddr) {
- dma_free_coherent(&dev->dev, extram_pool_sz, gdev->ddr_vaddr,
+ dma_free_coherent(dev, extram_pool_sz, gdev->ddr_vaddr,
gdev->ddr_paddr);
}
if (gdev->sram_vaddr)
@@ -115,13 +114,14 @@ static void pruss_cleanup(struct platform_device *dev,
kfree(gdev);
}
-static int pruss_probe(struct platform_device *dev)
+static int pruss_probe(struct platform_device *pdev)
{
struct uio_info *p;
struct uio_pruss_dev *gdev;
struct resource *regs_prussio;
+ struct device *dev = &pdev->dev;
int ret = -ENODEV, cnt = 0, len;
- struct uio_pruss_pdata *pdata = dev_get_platdata(&dev->dev);
+ struct uio_pruss_pdata *pdata = dev_get_platdata(dev);
gdev = kzalloc(sizeof(struct uio_pruss_dev), GFP_KERNEL);
if (!gdev)
@@ -132,10 +132,11 @@ static int pruss_probe(struct platform_device *dev)
kfree(gdev);
return -ENOMEM;
}
+
/* Power on PRU in case its not done as part of boot-loader */
- gdev->pruss_clk = clk_get(&dev->dev, "pruss");
+ gdev->pruss_clk = clk_get(dev, "pruss");
if (IS_ERR(gdev->pruss_clk)) {
- dev_err(&dev->dev, "Failed to get clock\n");
+ dev_err(dev, "Failed to get clock\n");
ret = PTR_ERR(gdev->pruss_clk);
kfree(gdev->info);
kfree(gdev);
@@ -144,14 +145,14 @@ static int pruss_probe(struct platform_device *dev)
clk_enable(gdev->pruss_clk);
}
- regs_prussio = platform_get_resource(dev, IORESOURCE_MEM, 0);
+ regs_prussio = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!regs_prussio) {
- dev_err(&dev->dev, "No PRUSS I/O resource specified\n");
+ dev_err(dev, "No PRUSS I/O resource specified\n");
goto out_free;
}
if (!regs_prussio->start) {
- dev_err(&dev->dev, "Invalid memory resource\n");
+ dev_err(dev, "Invalid memory resource\n");
goto out_free;
}
@@ -161,27 +162,27 @@ static int pruss_probe(struct platform_device *dev)
(unsigned long)gen_pool_dma_alloc(gdev->sram_pool,
sram_pool_sz, &gdev->sram_paddr);
if (!gdev->sram_vaddr) {
- dev_err(&dev->dev, "Could not allocate SRAM pool\n");
+ dev_err(dev, "Could not allocate SRAM pool\n");
goto out_free;
}
}
- gdev->ddr_vaddr = dma_alloc_coherent(&dev->dev, extram_pool_sz,
+ gdev->ddr_vaddr = dma_alloc_coherent(dev, extram_pool_sz,
&(gdev->ddr_paddr), GFP_KERNEL | GFP_DMA);
if (!gdev->ddr_vaddr) {
- dev_err(&dev->dev, "Could not allocate external memory\n");
+ dev_err(dev, "Could not allocate external memory\n");
goto out_free;
}
len = resource_size(regs_prussio);
gdev->prussio_vaddr = ioremap(regs_prussio->start, len);
if (!gdev->prussio_vaddr) {
- dev_err(&dev->dev, "Can't remap PRUSS I/O address range\n");
+ dev_err(dev, "Can't remap PRUSS I/O address range\n");
goto out_free;
}
gdev->pintc_base = pdata->pintc_base;
- gdev->hostirq_start = platform_get_irq(dev, 0);
+ gdev->hostirq_start = platform_get_irq(pdev, 0);
for (cnt = 0, p = gdev->info; cnt < MAX_PRUSS_EVT; cnt++, p++) {
p->mem[0].addr = regs_prussio->start;
@@ -204,12 +205,12 @@ static int pruss_probe(struct platform_device *dev)
p->handler = pruss_handler;
p->priv = gdev;
- ret = uio_register_device(&dev->dev, p);
+ ret = uio_register_device(dev, p);
if (ret < 0)
goto out_free;
}
- platform_set_drvdata(dev, gdev);
+ platform_set_drvdata(pdev, gdev);
return 0;
out_free:
@@ -221,7 +222,7 @@ static int pruss_remove(struct platform_device *dev)
{
struct uio_pruss_dev *gdev = platform_get_drvdata(dev);
- pruss_cleanup(dev, gdev);
+ pruss_cleanup(&dev->dev, gdev);
return 0;
}
diff --git a/drivers/vme/bridges/vme_ca91cx42.h b/drivers/vme/bridges/vme_ca91cx42.h
index 02a7c794db05..d46b12dc3b82 100644
--- a/drivers/vme/bridges/vme_ca91cx42.h
+++ b/drivers/vme/bridges/vme_ca91cx42.h
@@ -360,7 +360,6 @@ static const int CA91CX42_VSI_TO[] = { VSI0_TO, VSI1_TO, VSI2_TO, VSI3_TO,
*/
#define CA91CX42_DCTL_L2V (1<<31)
#define CA91CX42_DCTL_VDW_M (3<<22)
-#define CA91CX42_DCTL_VDW_M (3<<22)
#define CA91CX42_DCTL_VDW_D8 0
#define CA91CX42_DCTL_VDW_D16 (1<<22)
#define CA91CX42_DCTL_VDW_D32 (1<<23)
diff --git a/drivers/w1/masters/ds1wm.c b/drivers/w1/masters/ds1wm.c
index 02df3b1381d2..e0b8a4bc73df 100644
--- a/drivers/w1/masters/ds1wm.c
+++ b/drivers/w1/masters/ds1wm.c
@@ -563,7 +563,7 @@ static struct platform_driver ds1wm_driver = {
static int __init ds1wm_init(void)
{
- printk("DS1WM w1 busmaster driver - (c) 2004 Szabolcs Gyurko\n");
+ pr_info("DS1WM w1 busmaster driver - (c) 2004 Szabolcs Gyurko\n");
return platform_driver_register(&ds1wm_driver);
}
diff --git a/drivers/w1/masters/ds2482.c b/drivers/w1/masters/ds2482.c
index e033491fe308..e76a9b39abb2 100644
--- a/drivers/w1/masters/ds2482.c
+++ b/drivers/w1/masters/ds2482.c
@@ -226,7 +226,7 @@ static int ds2482_wait_1wire_idle(struct ds2482_data *pdev)
}
if (retries >= DS2482_WAIT_IDLE_TIMEOUT)
- printk(KERN_ERR "%s: timeout on channel %d\n",
+ pr_err("%s: timeout on channel %d\n",
__func__, pdev->channel);
return temp;
diff --git a/drivers/w1/masters/ds2490.c b/drivers/w1/masters/ds2490.c
index 7404ad3062b7..1de6df87bfa3 100644
--- a/drivers/w1/masters/ds2490.c
+++ b/drivers/w1/masters/ds2490.c
@@ -206,7 +206,7 @@ static int ds_send_control_cmd(struct ds_device *dev, u16 value, u16 index)
err = usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, dev->ep[EP_CONTROL]),
CONTROL_CMD, VENDOR, value, index, NULL, 0, 1000);
if (err < 0) {
- printk(KERN_ERR "Failed to send command control message %x.%x: err=%d.\n",
+ pr_err("Failed to send command control message %x.%x: err=%d.\n",
value, index, err);
return err;
}
@@ -221,7 +221,7 @@ static int ds_send_control_mode(struct ds_device *dev, u16 value, u16 index)
err = usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, dev->ep[EP_CONTROL]),
MODE_CMD, VENDOR, value, index, NULL, 0, 1000);
if (err < 0) {
- printk(KERN_ERR "Failed to send mode control message %x.%x: err=%d.\n",
+ pr_err("Failed to send mode control message %x.%x: err=%d.\n",
value, index, err);
return err;
}
@@ -236,7 +236,7 @@ static int ds_send_control(struct ds_device *dev, u16 value, u16 index)
err = usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, dev->ep[EP_CONTROL]),
COMM_CMD, VENDOR, value, index, NULL, 0, 1000);
if (err < 0) {
- printk(KERN_ERR "Failed to send control message %x.%x: err=%d.\n",
+ pr_err("Failed to send control message %x.%x: err=%d.\n",
value, index, err);
return err;
}
@@ -255,7 +255,8 @@ static int ds_recv_status_nodump(struct ds_device *dev, struct ds_status *st,
err = usb_interrupt_msg(dev->udev, usb_rcvintpipe(dev->udev,
dev->ep[EP_STATUS]), buf, size, &count, 100);
if (err < 0) {
- printk(KERN_ERR "Failed to read 1-wire data from 0x%x: err=%d.\n", dev->ep[EP_STATUS], err);
+ pr_err("Failed to read 1-wire data from 0x%x: err=%d.\n",
+ dev->ep[EP_STATUS], err);
return err;
}
@@ -267,17 +268,17 @@ static int ds_recv_status_nodump(struct ds_device *dev, struct ds_status *st,
static inline void ds_print_msg(unsigned char *buf, unsigned char *str, int off)
{
- printk(KERN_INFO "%45s: %8x\n", str, buf[off]);
+ pr_info("%45s: %8x\n", str, buf[off]);
}
static void ds_dump_status(struct ds_device *dev, unsigned char *buf, int count)
{
int i;
- printk(KERN_INFO "0x%x: count=%d, status: ", dev->ep[EP_STATUS], count);
+ pr_info("0x%x: count=%d, status: ", dev->ep[EP_STATUS], count);
for (i=0; i<count; ++i)
- printk("%02x ", buf[i]);
- printk(KERN_INFO "\n");
+ pr_info("%02x ", buf[i]);
+ pr_info("\n");
if (count >= 16) {
ds_print_msg(buf, "enable flag", 0);
@@ -305,21 +306,21 @@ static void ds_dump_status(struct ds_device *dev, unsigned char *buf, int count)
}
ds_print_msg(buf, "Result Register Value: ", i);
if (buf[i] & RR_NRS)
- printk(KERN_INFO "NRS: Reset no presence or ...\n");
+ pr_info("NRS: Reset no presence or ...\n");
if (buf[i] & RR_SH)
- printk(KERN_INFO "SH: short on reset or set path\n");
+ pr_info("SH: short on reset or set path\n");
if (buf[i] & RR_APP)
- printk(KERN_INFO "APP: alarming presence on reset\n");
+ pr_info("APP: alarming presence on reset\n");
if (buf[i] & RR_VPP)
- printk(KERN_INFO "VPP: 12V expected not seen\n");
+ pr_info("VPP: 12V expected not seen\n");
if (buf[i] & RR_CMP)
- printk(KERN_INFO "CMP: compare error\n");
+ pr_info("CMP: compare error\n");
if (buf[i] & RR_CRC)
- printk(KERN_INFO "CRC: CRC error detected\n");
+ pr_info("CRC: CRC error detected\n");
if (buf[i] & RR_RDP)
- printk(KERN_INFO "RDP: redirected page\n");
+ pr_info("RDP: redirected page\n");
if (buf[i] & RR_EOS)
- printk(KERN_INFO "EOS: end of search error\n");
+ pr_info("EOS: end of search error\n");
}
}
@@ -330,15 +331,13 @@ static void ds_reset_device(struct ds_device *dev)
* the strong pullup.
*/
if (ds_send_control_mode(dev, MOD_PULSE_EN, PULSE_SPUE))
- printk(KERN_ERR "ds_reset_device: "
- "Error allowing strong pullup\n");
+ pr_err("ds_reset_device: Error allowing strong pullup\n");
/* Chip strong pullup time was cleared. */
if (dev->spu_sleep) {
/* lower 4 bits are 0, see ds_set_pullup */
u8 del = dev->spu_sleep>>4;
if (ds_send_control(dev, COMM_SET_DURATION | COMM_IM, del))
- printk(KERN_ERR "ds_reset_device: "
- "Error setting duration\n");
+ pr_err("ds_reset_device: Error setting duration\n");
}
}
@@ -363,7 +362,7 @@ static int ds_recv_data(struct ds_device *dev, unsigned char *buf, int size)
u8 buf[ST_SIZE];
int count;
- printk(KERN_INFO "Clearing ep0x%x.\n", dev->ep[EP_DATA_IN]);
+ pr_info("Clearing ep0x%x.\n", dev->ep[EP_DATA_IN]);
usb_clear_halt(dev->udev, usb_rcvbulkpipe(dev->udev, dev->ep[EP_DATA_IN]));
count = ds_recv_status_nodump(dev, &st, buf, sizeof(buf));
@@ -391,7 +390,7 @@ static int ds_send_data(struct ds_device *dev, unsigned char *buf, int len)
count = 0;
err = usb_bulk_msg(dev->udev, usb_sndbulkpipe(dev->udev, dev->ep[EP_DATA_OUT]), buf, len, &count, 1000);
if (err < 0) {
- printk(KERN_ERR "Failed to write 1-wire data to ep0x%x: "
+ pr_err("Failed to write 1-wire data to ep0x%x: "
"err=%d.\n", dev->ep[EP_DATA_OUT], err);
return err;
}
@@ -475,7 +474,7 @@ static int ds_wait_status(struct ds_device *dev, struct ds_status *st)
} while (!(st->status & ST_IDLE) && !(err < 0) && ++count < 100);
if (err >= 16 && st->status & ST_EPOF) {
- printk(KERN_INFO "Resetting device after ST_EPOF.\n");
+ pr_info("Resetting device after ST_EPOF.\n");
ds_reset_device(dev);
/* Always dump the device status. */
count = 101;
@@ -992,7 +991,7 @@ static int ds_probe(struct usb_interface *intf,
dev = kzalloc(sizeof(struct ds_device), GFP_KERNEL);
if (!dev) {
- printk(KERN_INFO "Failed to allocate new DS9490R structure.\n");
+ pr_info("Failed to allocate new DS9490R structure.\n");
return -ENOMEM;
}
dev->udev = usb_get_dev(udev);
@@ -1024,7 +1023,8 @@ static int ds_probe(struct usb_interface *intf,
iface_desc = &intf->altsetting[alt];
if (iface_desc->desc.bNumEndpoints != NUM_EP-1) {
- printk(KERN_INFO "Num endpoints=%d. It is not DS9490R.\n", iface_desc->desc.bNumEndpoints);
+ pr_info("Num endpoints=%d. It is not DS9490R.\n",
+ iface_desc->desc.bNumEndpoints);
err = -EINVAL;
goto err_out_clear;
}
diff --git a/drivers/w1/masters/mxc_w1.c b/drivers/w1/masters/mxc_w1.c
index a5df5e89d456..da3d0f0ad63c 100644
--- a/drivers/w1/masters/mxc_w1.c
+++ b/drivers/w1/masters/mxc_w1.c
@@ -15,16 +15,13 @@
#include <linux/clk.h>
#include <linux/delay.h>
#include <linux/io.h>
+#include <linux/jiffies.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include "../w1.h"
#include "../w1_int.h"
-/* According to the mx27 Datasheet the reset procedure should take up to about
- * 1350us. We set the timeout to 500*100us = 50ms for sure */
-#define MXC_W1_RESET_TIMEOUT 500
-
/*
* MXC W1 Register offsets
*/
@@ -35,6 +32,7 @@
# define MXC_W1_CONTROL_RPP BIT(7)
#define MXC_W1_TIME_DIVIDER 0x02
#define MXC_W1_RESET 0x04
+# define MXC_W1_RESET_RST BIT(0)
struct mxc_w1_device {
void __iomem *regs;
@@ -49,24 +47,25 @@ struct mxc_w1_device {
*/
static u8 mxc_w1_ds2_reset_bus(void *data)
{
- u8 reg_val;
- unsigned int timeout_cnt = 0;
struct mxc_w1_device *dev = data;
+ unsigned long timeout;
+
+ writeb(MXC_W1_CONTROL_RPP, dev->regs + MXC_W1_CONTROL);
- writeb(MXC_W1_CONTROL_RPP, (dev->regs + MXC_W1_CONTROL));
+ /* Wait for reset sequence 511+512us, use 1500us for sure */
+ timeout = jiffies + usecs_to_jiffies(1500);
- while (1) {
- reg_val = readb(dev->regs + MXC_W1_CONTROL);
+ udelay(511 + 512);
- if (!(reg_val & MXC_W1_CONTROL_RPP) ||
- timeout_cnt > MXC_W1_RESET_TIMEOUT)
- break;
- else
- timeout_cnt++;
+ do {
+ u8 ctrl = readb(dev->regs + MXC_W1_CONTROL);
- udelay(100);
- }
- return !(reg_val & MXC_W1_CONTROL_PST);
+ /* PST bit is valid after the RPP bit is self-cleared */
+ if (!(ctrl & MXC_W1_CONTROL_RPP))
+ return !(ctrl & MXC_W1_CONTROL_PST);
+ } while (time_is_after_jiffies(timeout));
+
+ return 1;
}
/*
@@ -76,22 +75,25 @@ static u8 mxc_w1_ds2_reset_bus(void *data)
*/
static u8 mxc_w1_ds2_touch_bit(void *data, u8 bit)
{
- struct mxc_w1_device *mdev = data;
- void __iomem *ctrl_addr = mdev->regs + MXC_W1_CONTROL;
- unsigned int timeout_cnt = 400; /* Takes max. 120us according to
- * datasheet.
- */
+ struct mxc_w1_device *dev = data;
+ unsigned long timeout;
- writeb(MXC_W1_CONTROL_WR(bit), ctrl_addr);
+ writeb(MXC_W1_CONTROL_WR(bit), dev->regs + MXC_W1_CONTROL);
- while (timeout_cnt--) {
- if (!(readb(ctrl_addr) & MXC_W1_CONTROL_WR(bit)))
- break;
+ /* Wait for read/write bit (60us, Max 120us), use 200us for sure */
+ timeout = jiffies + usecs_to_jiffies(200);
- udelay(1);
- }
+ udelay(60);
- return !!(readb(ctrl_addr) & MXC_W1_CONTROL_RDST);
+ do {
+ u8 ctrl = readb(dev->regs + MXC_W1_CONTROL);
+
+ /* RDST bit is valid after the WR1/RD bit is self-cleared */
+ if (!(ctrl & MXC_W1_CONTROL_WR(bit)))
+ return !!(ctrl & MXC_W1_CONTROL_RDST);
+ } while (time_is_after_jiffies(timeout));
+
+ return 0;
}
static int mxc_w1_probe(struct platform_device *pdev)
@@ -131,6 +133,10 @@ static int mxc_w1_probe(struct platform_device *pdev)
if (err)
return err;
+ /* Software reset 1-Wire module */
+ writeb(MXC_W1_RESET_RST, mdev->regs + MXC_W1_RESET);
+ writeb(0, mdev->regs + MXC_W1_RESET);
+
writeb(clkdiv - 1, mdev->regs + MXC_W1_TIME_DIVIDER);
mdev->bus_master.data = mdev;
diff --git a/drivers/w1/slaves/Kconfig b/drivers/w1/slaves/Kconfig
index 1cdce80b6abf..cfe74d09932e 100644
--- a/drivers/w1/slaves/Kconfig
+++ b/drivers/w1/slaves/Kconfig
@@ -38,6 +38,14 @@ config W1_SLAVE_DS2413
Say Y here if you want to use a 1-wire
DS2413 Dual Channel Addressable Switch device support
+config W1_SLAVE_DS2406
+ tristate "Dual Channel Addressable Switch 0x12 family support (DS2406)"
+ select CRC16
+ help
+ Say Y or M here if you want to use a 1-wire
+ DS2406 Dual Channel Addressable Switch. EPROM read/write
+ support for these devices is not implemented.
+
config W1_SLAVE_DS2423
tristate "Counter 1-wire device (DS2423)"
select CRC16
diff --git a/drivers/w1/slaves/Makefile b/drivers/w1/slaves/Makefile
index 06529f3157ab..1e9989afe7bf 100644
--- a/drivers/w1/slaves/Makefile
+++ b/drivers/w1/slaves/Makefile
@@ -6,6 +6,7 @@ obj-$(CONFIG_W1_SLAVE_THERM) += w1_therm.o
obj-$(CONFIG_W1_SLAVE_SMEM) += w1_smem.o
obj-$(CONFIG_W1_SLAVE_DS2408) += w1_ds2408.o
obj-$(CONFIG_W1_SLAVE_DS2413) += w1_ds2413.o
+obj-$(CONFIG_W1_SLAVE_DS2406) += w1_ds2406.o
obj-$(CONFIG_W1_SLAVE_DS2423) += w1_ds2423.o
obj-$(CONFIG_W1_SLAVE_DS2431) += w1_ds2431.o
obj-$(CONFIG_W1_SLAVE_DS2433) += w1_ds2433.o
diff --git a/drivers/w1/slaves/w1_ds2406.c b/drivers/w1/slaves/w1_ds2406.c
new file mode 100644
index 000000000000..d488961a8c90
--- /dev/null
+++ b/drivers/w1/slaves/w1_ds2406.c
@@ -0,0 +1,168 @@
+/*
+ * w1_ds2406.c - w1 family 12 (DS2406) driver
+ * based on w1_ds2413.c by Mariusz Bialonczyk <manio@skyboo.net>
+ *
+ * Copyright (c) 2014 Scott Alfter <scott@alfter.us>
+ *
+ * This source code is licensed under the GNU General Public License,
+ * Version 2. See the file COPYING for more details.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/device.h>
+#include <linux/types.h>
+#include <linux/delay.h>
+#include <linux/slab.h>
+#include <linux/crc16.h>
+
+#include "../w1.h"
+#include "../w1_int.h"
+#include "../w1_family.h"
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Scott Alfter <scott@alfter.us>");
+MODULE_DESCRIPTION("w1 family 12 driver for DS2406 2 Pin IO");
+
+#define W1_F12_FUNC_READ_STATUS 0xAA
+#define W1_F12_FUNC_WRITE_STATUS 0x55
+
+static ssize_t w1_f12_read_state(
+ struct file *filp, struct kobject *kobj,
+ struct bin_attribute *bin_attr,
+ char *buf, loff_t off, size_t count)
+{
+ u8 w1_buf[6]={W1_F12_FUNC_READ_STATUS, 7, 0, 0, 0, 0};
+ struct w1_slave *sl = kobj_to_w1_slave(kobj);
+ u16 crc=0;
+ int i;
+ ssize_t rtnval=1;
+
+ if (off != 0)
+ return 0;
+ if (!buf)
+ return -EINVAL;
+
+ mutex_lock(&sl->master->bus_mutex);
+
+ if (w1_reset_select_slave(sl)) {
+ mutex_unlock(&sl->master->bus_mutex);
+ return -EIO;
+ }
+
+ w1_write_block(sl->master, w1_buf, 3);
+ w1_read_block(sl->master, w1_buf+3, 3);
+ for (i=0; i<6; i++)
+ crc=crc16_byte(crc, w1_buf[i]);
+ if (crc==0xb001) /* good read? */
+ *buf=((w1_buf[3]>>5)&3)|0x30;
+ else
+ rtnval=-EIO;
+
+ mutex_unlock(&sl->master->bus_mutex);
+
+ return rtnval;
+}
+
+static ssize_t w1_f12_write_output(
+ struct file *filp, struct kobject *kobj,
+ struct bin_attribute *bin_attr,
+ char *buf, loff_t off, size_t count)
+{
+ struct w1_slave *sl = kobj_to_w1_slave(kobj);
+ u8 w1_buf[6]={W1_F12_FUNC_WRITE_STATUS, 7, 0, 0, 0, 0};
+ u16 crc=0;
+ int i;
+ ssize_t rtnval=1;
+
+ if (count != 1 || off != 0)
+ return -EFAULT;
+
+ mutex_lock(&sl->master->bus_mutex);
+
+ if (w1_reset_select_slave(sl)) {
+ mutex_unlock(&sl->master->bus_mutex);
+ return -EIO;
+ }
+
+ w1_buf[3] = (((*buf)&3)<<5)|0x1F;
+ w1_write_block(sl->master, w1_buf, 4);
+ w1_read_block(sl->master, w1_buf+4, 2);
+ for (i=0; i<6; i++)
+ crc=crc16_byte(crc, w1_buf[i]);
+ if (crc==0xb001) /* good read? */
+ w1_write_8(sl->master, 0xFF);
+ else
+ rtnval=-EIO;
+
+ mutex_unlock(&sl->master->bus_mutex);
+ return rtnval;
+}
+
+#define NB_SYSFS_BIN_FILES 2
+static struct bin_attribute w1_f12_sysfs_bin_files[NB_SYSFS_BIN_FILES] = {
+ {
+ .attr = {
+ .name = "state",
+ .mode = S_IRUGO,
+ },
+ .size = 1,
+ .read = w1_f12_read_state,
+ },
+ {
+ .attr = {
+ .name = "output",
+ .mode = S_IRUGO | S_IWUSR | S_IWGRP,
+ },
+ .size = 1,
+ .write = w1_f12_write_output,
+ }
+};
+
+static int w1_f12_add_slave(struct w1_slave *sl)
+{
+ int err = 0;
+ int i;
+
+ for (i = 0; i < NB_SYSFS_BIN_FILES && !err; ++i)
+ err = sysfs_create_bin_file(
+ &sl->dev.kobj,
+ &(w1_f12_sysfs_bin_files[i]));
+ if (err)
+ while (--i >= 0)
+ sysfs_remove_bin_file(&sl->dev.kobj,
+ &(w1_f12_sysfs_bin_files[i]));
+ return err;
+}
+
+static void w1_f12_remove_slave(struct w1_slave *sl)
+{
+ int i;
+ for (i = NB_SYSFS_BIN_FILES - 1; i >= 0; --i)
+ sysfs_remove_bin_file(&sl->dev.kobj,
+ &(w1_f12_sysfs_bin_files[i]));
+}
+
+static struct w1_family_ops w1_f12_fops = {
+ .add_slave = w1_f12_add_slave,
+ .remove_slave = w1_f12_remove_slave,
+};
+
+static struct w1_family w1_family_12 = {
+ .fid = W1_FAMILY_DS2406,
+ .fops = &w1_f12_fops,
+};
+
+static int __init w1_f12_init(void)
+{
+ return w1_register_family(&w1_family_12);
+}
+
+static void __exit w1_f12_exit(void)
+{
+ w1_unregister_family(&w1_family_12);
+}
+
+module_init(w1_f12_init);
+module_exit(w1_f12_exit);
diff --git a/drivers/w1/slaves/w1_ds2760.c b/drivers/w1/slaves/w1_ds2760.c
index 65f90dccd60e..d9079d48d112 100644
--- a/drivers/w1/slaves/w1_ds2760.c
+++ b/drivers/w1/slaves/w1_ds2760.c
@@ -181,8 +181,7 @@ static struct w1_family w1_ds2760_family = {
static int __init w1_ds2760_init(void)
{
- printk(KERN_INFO "1-Wire driver for the DS2760 battery monitor "
- " chip - (c) 2004-2005, Szabolcs Gyurko\n");
+ pr_info("1-Wire driver for the DS2760 battery monitor chip - (c) 2004-2005, Szabolcs Gyurko\n");
ida_init(&bat_ida);
return w1_register_family(&w1_ds2760_family);
}
diff --git a/drivers/w1/w1.c b/drivers/w1/w1.c
index 5d7341520544..592f7edc671e 100644
--- a/drivers/w1/w1.c
+++ b/drivers/w1/w1.c
@@ -1162,28 +1162,26 @@ static int __init w1_init(void)
{
int retval;
- printk(KERN_INFO "Driver for 1-wire Dallas network protocol.\n");
+ pr_info("Driver for 1-wire Dallas network protocol.\n");
w1_init_netlink();
retval = bus_register(&w1_bus_type);
if (retval) {
- printk(KERN_ERR "Failed to register bus. err=%d.\n", retval);
+ pr_err("Failed to register bus. err=%d.\n", retval);
goto err_out_exit_init;
}
retval = driver_register(&w1_master_driver);
if (retval) {
- printk(KERN_ERR
- "Failed to register master driver. err=%d.\n",
+ pr_err("Failed to register master driver. err=%d.\n",
retval);
goto err_out_bus_unregister;
}
retval = driver_register(&w1_slave_driver);
if (retval) {
- printk(KERN_ERR
- "Failed to register slave driver. err=%d.\n",
+ pr_err("Failed to register slave driver. err=%d.\n",
retval);
goto err_out_master_unregister;
}
diff --git a/drivers/w1/w1_family.c b/drivers/w1/w1_family.c
index 3651ec801f45..1dc3051f7d76 100644
--- a/drivers/w1/w1_family.c
+++ b/drivers/w1/w1_family.c
@@ -87,7 +87,7 @@ void w1_unregister_family(struct w1_family *fent)
w1_reconnect_slaves(fent, 0);
while (atomic_read(&fent->refcnt)) {
- printk(KERN_INFO "Waiting for family %u to become free: refcnt=%d.\n",
+ pr_info("Waiting for family %u to become free: refcnt=%d.\n",
fent->fid, atomic_read(&fent->refcnt));
if (msleep_interruptible(1000))
diff --git a/drivers/w1/w1_family.h b/drivers/w1/w1_family.h
index 26ca1343055b..0d18365b61ad 100644
--- a/drivers/w1/w1_family.h
+++ b/drivers/w1/w1_family.h
@@ -40,6 +40,7 @@
#define W1_FAMILY_DS2760 0x30
#define W1_FAMILY_DS2780 0x32
#define W1_FAMILY_DS2413 0x3A
+#define W1_FAMILY_DS2406 0x12
#define W1_THERM_DS1825 0x3B
#define W1_FAMILY_DS2781 0x3D
#define W1_THERM_DS28EA00 0x42
diff --git a/drivers/w1/w1_int.c b/drivers/w1/w1_int.c
index 728039d2efe1..47249a30eae3 100644
--- a/drivers/w1/w1_int.c
+++ b/drivers/w1/w1_int.c
@@ -38,7 +38,7 @@ module_param_named(search_count, w1_search_count, int, 0);
static int w1_enable_pullup = 1;
module_param_named(enable_pullup, w1_enable_pullup, int, 0);
-static struct w1_master * w1_alloc_dev(u32 id, int slave_count, int slave_ttl,
+static struct w1_master *w1_alloc_dev(u32 id, int slave_count, int slave_ttl,
struct device_driver *driver,
struct device *device)
{
@@ -50,8 +50,7 @@ static struct w1_master * w1_alloc_dev(u32 id, int slave_count, int slave_ttl,
*/
dev = kzalloc(sizeof(struct w1_master) + sizeof(struct w1_bus_master), GFP_KERNEL);
if (!dev) {
- printk(KERN_ERR
- "Failed to allocate %zd bytes for new w1 device.\n",
+ pr_err("Failed to allocate %zd bytes for new w1 device.\n",
sizeof(struct w1_master));
return NULL;
}
@@ -91,7 +90,7 @@ static struct w1_master * w1_alloc_dev(u32 id, int slave_count, int slave_ttl,
err = device_register(&dev->dev);
if (err) {
- printk(KERN_ERR "Failed to register master device. err=%d\n", err);
+ pr_err("Failed to register master device. err=%d\n", err);
memset(dev, 0, sizeof(struct w1_master));
kfree(dev);
dev = NULL;
@@ -116,13 +115,13 @@ int w1_add_master_device(struct w1_bus_master *master)
struct w1_netlink_msg msg;
int id, found;
- /* validate minimum functionality */
- if (!(master->touch_bit && master->reset_bus) &&
- !(master->write_bit && master->read_bit) &&
+ /* validate minimum functionality */
+ if (!(master->touch_bit && master->reset_bus) &&
+ !(master->write_bit && master->read_bit) &&
!(master->write_byte && master->read_byte && master->reset_bus)) {
- printk(KERN_ERR "w1_add_master_device: invalid function set\n");
+ pr_err("w1_add_master_device: invalid function set\n");
return(-EINVAL);
- }
+ }
/* Lock until the device is added (or not) to w1_masters. */
mutex_lock(&w1_mlock);
@@ -254,7 +253,7 @@ void w1_remove_master_device(struct w1_bus_master *bm)
}
if (!found) {
- printk(KERN_ERR "Device doesn't exist.\n");
+ pr_err("Device doesn't exist.\n");
return;
}
diff --git a/drivers/w1/w1_log.h b/drivers/w1/w1_log.h
index 9c7bd62e6bdc..f9eecff23b8d 100644
--- a/drivers/w1/w1_log.h
+++ b/drivers/w1/w1_log.h
@@ -29,8 +29,8 @@
#else
# define assert(expr) \
if(unlikely(!(expr))) { \
- printk(KERN_ERR "Assertion failed! %s,%s,%s,line=%d\n", \
- #expr, __FILE__, __func__, __LINE__); \
+ pr_err("Assertion failed! %s,%s,%s,line=%d\n", \
+ #expr, __FILE__, __func__, __LINE__); \
}
#endif
diff --git a/drivers/w1/w1_netlink.c b/drivers/w1/w1_netlink.c
index 351a2978ba72..dd9656237274 100644
--- a/drivers/w1/w1_netlink.c
+++ b/drivers/w1/w1_netlink.c
@@ -680,8 +680,7 @@ static void w1_cn_callback(struct cn_msg *cn, struct netlink_skb_parms *nsp)
if (sl)
dev = sl->master;
} else {
- printk(KERN_NOTICE
- "%s: cn: %x.%x, wrong type: %u, len: %u.\n",
+ pr_notice("%s: cn: %x.%x, wrong type: %u, len: %u.\n",
__func__, cn->id.idx, cn->id.val,
msg->type, msg->len);
err = -EPROTO;