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-rw-r--r--meta-bytedance/meta-g220a/recipes-kernel/linux/linux-aspeed/0003-misc-aspeed-Add-Aspeed-UART-routing-control-driver.patch521
1 files changed, 0 insertions, 521 deletions
diff --git a/meta-bytedance/meta-g220a/recipes-kernel/linux/linux-aspeed/0003-misc-aspeed-Add-Aspeed-UART-routing-control-driver.patch b/meta-bytedance/meta-g220a/recipes-kernel/linux/linux-aspeed/0003-misc-aspeed-Add-Aspeed-UART-routing-control-driver.patch
deleted file mode 100644
index 317f94b05..000000000
--- a/meta-bytedance/meta-g220a/recipes-kernel/linux/linux-aspeed/0003-misc-aspeed-Add-Aspeed-UART-routing-control-driver.patch
+++ /dev/null
@@ -1,521 +0,0 @@
-From e0769dda0adcabc41d322726b16148e3960473c1 Mon Sep 17 00:00:00 2001
-From: Oskar Senft <osk@google.com>
-Date: Wed, 8 Aug 2018 10:15:05 -0400
-Subject: [PATCH] misc: aspeed: Add Aspeed UART routing control driver.
-
-This driver adds sysfs files that allow the BMC userspace to configure
-how UARTs and physical serial I/O ports are routed.
-
-Tested: Checked correct behavior (both read & write) on TYAN S7106
-board by manually changing routing settings and confirming that bits
-flow as expected. Tested for UART1 and UART3 as this board doesn't have
-the other UARTs wired up in a testable way.
-
-Signed-off-by: Oskar Senft <osk@google.com>
-Signed-off-by: Yong Li <yong.b.li@linux.intel.com>
-Signed-off-by: Vernon Mauery <vernon.mauery@linux.intel.com>
-Signed-off-by: John Wang <wangzhiqiang.bj@bytedance.com>
----
- .../stable/sysfs-driver-aspeed-uart-routing | 14 +
- .../misc-devices/aspeed-uart-routing.txt | 49 +++
- drivers/misc/Kconfig | 6 +
- drivers/misc/Makefile | 1 +
- drivers/misc/aspeed-uart-routing.c | 383 ++++++++++++++++++
- 5 files changed, 453 insertions(+)
- create mode 100644 Documentation/ABI/stable/sysfs-driver-aspeed-uart-routing
- create mode 100644 Documentation/misc-devices/aspeed-uart-routing.txt
- create mode 100644 drivers/misc/aspeed-uart-routing.c
-
-diff --git a/Documentation/ABI/stable/sysfs-driver-aspeed-uart-routing b/Documentation/ABI/stable/sysfs-driver-aspeed-uart-routing
-new file mode 100644
-index 000000000000..5068737d9c12
---- /dev/null
-+++ b/Documentation/ABI/stable/sysfs-driver-aspeed-uart-routing
-@@ -0,0 +1,14 @@
-+What: /sys/bus/platform/drivers/aspeed-uart-routing/*/io*
-+Date: August 2018
-+Contact: Oskar Senft <osk@google.com>
-+Description: Configures the input source for the specific physical
-+ serial I/O port.
-+Users: OpenBMC. Proposed changes should be mailed to
-+ openbmc@lists.ozlabs.org
-+
-+What: /sys/bus/platform/drivers/aspeed-uart-routing/*/uart*
-+Date: August 2018
-+Contact: Oskar Senft <osk@google.com>
-+Description: Configures the input source for the specific UART.
-+Users: OpenBMC. Proposed changes should be mailed to
-+ openbmc@lists.ozlabs.org
-diff --git a/Documentation/misc-devices/aspeed-uart-routing.txt b/Documentation/misc-devices/aspeed-uart-routing.txt
-new file mode 100644
-index 000000000000..cf1c2a466875
---- /dev/null
-+++ b/Documentation/misc-devices/aspeed-uart-routing.txt
-@@ -0,0 +1,49 @@
-+Kernel driver aspeed-uart-routing
-+=================================
-+
-+Supported chips:
-+ASPEED AST2500/AST2600
-+
-+Author:
-+Google LLC
-+
-+Description
-+-----------
-+
-+The Aspeed AST2500/AST2600 allows to dynamically route the inputs for the
-+built-in UARTS and physical serial I/O ports.
-+
-+This allows, for example, to connect the output of UART to another UART.
-+This can be used to enable host<->BMC communication via UARTs, e.g. to allow
-+access to the host's serial console.
-+
-+This driver is for the BMC side. The sysfs files allow the BMC userspace
-+which owns the system configuration policy, to configure how UARTs and
-+physical serial I/O ports are routed.
-+
-+The driver provides the following files in sysfs:
-+uart1 Configure the input signal to UART1.
-+uart2 Configure the input signal to UART2.
-+uart3 Configure the input signal to UART3.
-+uart4 Configure the input signal to UART4.
-+uart5 Configure the input signal to UART5.
-+io1 Configure the input signal to physical serial port 1.
-+io2 Configure the input signal to physical serial port 2.
-+io3 Configure the input signal to physical serial port 3.
-+io4 Configure the input signal to physical serial port 4.
-+io5 Configure the input signal to physical serial port 5.
-+
-+When read, each file shows the list of available options with the currently
-+selected option marked by square brackets "[]". The list of available options
-+depends on the selected file.
-+
-+Example:
-+$ cat /sys/bus/platform/drivers/aspeed-uart-routing/*.uart_routing/uart1
-+[io1] io2 io3 io4 uart2 uart3 uart4 io6
-+
-+In this case, UART1 gets its input signal from IO1 (physical serial port 1).
-+
-+$ echo -n "uart3" \
-+ >/sys/bus/platform/drivers/aspeed-uart-routing/*.uart_routing/uart1
-+$ cat /sys/bus/platform/drivers/aspeed-uart-routing/*.uart_routing/uart1
-+io1 io2 io3 io4 uart2 [uart3] uart4 io6
-diff --git a/drivers/misc/Kconfig b/drivers/misc/Kconfig
-index 54cfb599cd3e..9d2d95ab313a 100644
---- a/drivers/misc/Kconfig
-+++ b/drivers/misc/Kconfig
-@@ -487,6 +487,12 @@ config NPCM7XX_JTAG_MASTER
- help
- Control PSPI/GPIO to transmit jtag signals to support jtag master function.
-
-+config ASPEED_UART_ROUTING
-+ tristate "Aspeed ast2500 UART routing control"
-+ help
-+ If you want to configure UART routing on Aspeed BMC platforms, enable
-+ this option.
-+
- source "drivers/misc/c2port/Kconfig"
- source "drivers/misc/eeprom/Kconfig"
- source "drivers/misc/cb710/Kconfig"
-diff --git a/drivers/misc/Makefile b/drivers/misc/Makefile
-index 39e5ba5d0985..77e95db728da 100644
---- a/drivers/misc/Makefile
-+++ b/drivers/misc/Makefile
-@@ -60,3 +60,4 @@ obj-$(CONFIG_HISI_HIKEY_USB) += hisi_hikey_usb.o
- obj-$(CONFIG_NPCM7XX_LPC_BPC) += npcm7xx-lpc-bpc.o
- obj-$(CONFIG_NPCM7XX_PCI_MBOX) += npcm7xx-pci-mbox.o
- obj-$(CONFIG_NPCM7XX_JTAG_MASTER) += npcm7xx-jtag-master.o
-+obj-$(CONFIG_ASPEED_UART_ROUTING) += aspeed-uart-routing.o
-diff --git a/drivers/misc/aspeed-uart-routing.c b/drivers/misc/aspeed-uart-routing.c
-new file mode 100644
-index 000000000000..21ef5d98c317
---- /dev/null
-+++ b/drivers/misc/aspeed-uart-routing.c
-@@ -0,0 +1,383 @@
-+/*
-+ * UART Routing driver for Aspeed AST2500
-+ *
-+ * Copyright (c) 2018 Google LLC
-+ *
-+ * 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.
-+ */
-+#include <linux/device.h>
-+#include <linux/module.h>
-+#include <linux/of_address.h>
-+#include <linux/of_platform.h>
-+
-+/* The Aspeed AST2500 allows to dynamically route the inputs for the built-in
-+ * UARTS and physical serial I/O ports.
-+ *
-+ * This allows, for example, to connect the output of UART to another UART.
-+ * This can be used to enable host<->BMC communication via UARTs, e.g. to allow
-+ * access to the host's serial console.
-+ *
-+ * This driver is for the BMC side. The sysfs files allow the BMC userspace
-+ * which owns the system configuration policy, to configure how UARTs and
-+ * physical serial I/O ports are routed.
-+ */
-+
-+#define ASPEED_HICRA_IO1 "io1"
-+#define ASPEED_HICRA_IO2 "io2"
-+#define ASPEED_HICRA_IO3 "io3"
-+#define ASPEED_HICRA_IO4 "io4"
-+#define ASPEED_HICRA_IO5 "io5"
-+#define ASPEED_HICRA_IO6 "io6"
-+#define ASPEED_HICRA_UART1 "uart1"
-+#define ASPEED_HICRA_UART2 "uart2"
-+#define ASPEED_HICRA_UART3 "uart3"
-+#define ASPEED_HICRA_UART4 "uart4"
-+#define ASPEED_HICRA_UART5 "uart5"
-+
-+struct aspeed_uart_routing {
-+ struct device *dev;
-+ void __iomem *regs;
-+ spinlock_t lock;
-+};
-+
-+struct aspeed_uart_routing_selector {
-+ struct device_attribute dev_attr;
-+ int shift;
-+ int mask;
-+ const char * const options[];
-+};
-+
-+#define to_routing_selector(_dev_attr) \
-+ container_of(_dev_attr, struct aspeed_uart_routing_selector, dev_attr)
-+
-+
-+static ssize_t aspeed_uart_routing_show(struct device *dev,
-+ struct device_attribute *attr,
-+ char *buf);
-+
-+static ssize_t aspeed_uart_routing_store(struct device *dev,
-+ struct device_attribute *attr,
-+ const char *buf, size_t count);
-+
-+#define ROUTING_ATTR(_name) { \
-+ .attr = {.name = _name, \
-+ .mode = VERIFY_OCTAL_PERMISSIONS(S_IWUSR | S_IRUGO) }, \
-+ .show = aspeed_uart_routing_show, \
-+ .store = aspeed_uart_routing_store, \
-+}
-+
-+static struct aspeed_uart_routing_selector uart5_sel = {
-+ .dev_attr = ROUTING_ATTR(ASPEED_HICRA_UART5),
-+ .shift = 28,
-+ .mask = 0xf,
-+ .options = {
-+ ASPEED_HICRA_IO5, // 0
-+ ASPEED_HICRA_IO1, // 1
-+ ASPEED_HICRA_IO2, // 2
-+ ASPEED_HICRA_IO3, // 3
-+ ASPEED_HICRA_IO4, // 4
-+ ASPEED_HICRA_UART1, // 5
-+ ASPEED_HICRA_UART2, // 6
-+ ASPEED_HICRA_UART3, // 7
-+ ASPEED_HICRA_UART4, // 8
-+ ASPEED_HICRA_IO6, // 9
-+ NULL, // NULL termination
-+ },
-+};
-+
-+static struct aspeed_uart_routing_selector uart4_sel = {
-+ .dev_attr = ROUTING_ATTR(ASPEED_HICRA_UART4),
-+ .shift = 25,
-+ .mask = 0x7,
-+ .options = {
-+ ASPEED_HICRA_IO4, // 0
-+ ASPEED_HICRA_IO1, // 1
-+ ASPEED_HICRA_IO2, // 2
-+ ASPEED_HICRA_IO3, // 3
-+ ASPEED_HICRA_UART1, // 4
-+ ASPEED_HICRA_UART2, // 5
-+ ASPEED_HICRA_UART3, // 6
-+ ASPEED_HICRA_IO6, // 7
-+ NULL, // NULL termination
-+ },
-+};
-+
-+static struct aspeed_uart_routing_selector uart3_sel = {
-+ .dev_attr = ROUTING_ATTR(ASPEED_HICRA_UART3),
-+ .shift = 22,
-+ .mask = 0x7,
-+ .options = {
-+ ASPEED_HICRA_IO3, // 0
-+ ASPEED_HICRA_IO4, // 1
-+ ASPEED_HICRA_IO1, // 2
-+ ASPEED_HICRA_IO2, // 3
-+ ASPEED_HICRA_UART4, // 4
-+ ASPEED_HICRA_UART1, // 5
-+ ASPEED_HICRA_UART2, // 6
-+ ASPEED_HICRA_IO6, // 7
-+ NULL, // NULL termination
-+ },
-+};
-+
-+static struct aspeed_uart_routing_selector uart2_sel = {
-+ .dev_attr = ROUTING_ATTR(ASPEED_HICRA_UART2),
-+ .shift = 19,
-+ .mask = 0x7,
-+ .options = {
-+ ASPEED_HICRA_IO2, // 0
-+ ASPEED_HICRA_IO3, // 1
-+ ASPEED_HICRA_IO4, // 2
-+ ASPEED_HICRA_IO1, // 3
-+ ASPEED_HICRA_UART3, // 4
-+ ASPEED_HICRA_UART4, // 5
-+ ASPEED_HICRA_UART1, // 6
-+ ASPEED_HICRA_IO6, // 7
-+ NULL, // NULL termination
-+ },
-+};
-+
-+static struct aspeed_uart_routing_selector uart1_sel = {
-+ .dev_attr = ROUTING_ATTR(ASPEED_HICRA_UART1),
-+ .shift = 16,
-+ .mask = 0x7,
-+ .options = {
-+ ASPEED_HICRA_IO1, // 0
-+ ASPEED_HICRA_IO2, // 1
-+ ASPEED_HICRA_IO3, // 2
-+ ASPEED_HICRA_IO4, // 3
-+ ASPEED_HICRA_UART2, // 4
-+ ASPEED_HICRA_UART3, // 5
-+ ASPEED_HICRA_UART4, // 6
-+ ASPEED_HICRA_IO6, // 7
-+ NULL, // NULL termination
-+ },
-+};
-+
-+static struct aspeed_uart_routing_selector io5_sel = {
-+ .dev_attr = ROUTING_ATTR(ASPEED_HICRA_IO5),
-+ .shift = 12,
-+ .mask = 0x7,
-+ .options = {
-+ ASPEED_HICRA_UART5, // 0
-+ ASPEED_HICRA_UART1, // 1
-+ ASPEED_HICRA_UART2, // 2
-+ ASPEED_HICRA_UART3, // 3
-+ ASPEED_HICRA_UART4, // 4
-+ ASPEED_HICRA_IO1, // 5
-+ ASPEED_HICRA_IO3, // 6
-+ ASPEED_HICRA_IO6, // 7
-+ NULL, // NULL termination
-+ },
-+};
-+
-+static struct aspeed_uart_routing_selector io4_sel = {
-+ .dev_attr = ROUTING_ATTR(ASPEED_HICRA_IO4),
-+ .shift = 9,
-+ .mask = 0x7,
-+ .options = {
-+ ASPEED_HICRA_UART4, // 0
-+ ASPEED_HICRA_UART5, // 1
-+ ASPEED_HICRA_UART1, // 2
-+ ASPEED_HICRA_UART2, // 3
-+ ASPEED_HICRA_UART3, // 4
-+ ASPEED_HICRA_IO1, // 5
-+ ASPEED_HICRA_IO2, // 6
-+ ASPEED_HICRA_IO6, // 7
-+ NULL, // NULL termination
-+ },
-+};
-+
-+static struct aspeed_uart_routing_selector io3_sel = {
-+ .dev_attr = ROUTING_ATTR(ASPEED_HICRA_IO3),
-+ .shift = 6,
-+ .mask = 0x7,
-+ .options = {
-+ ASPEED_HICRA_UART3, // 0
-+ ASPEED_HICRA_UART4, // 1
-+ ASPEED_HICRA_UART5, // 2
-+ ASPEED_HICRA_UART1, // 3
-+ ASPEED_HICRA_UART2, // 4
-+ ASPEED_HICRA_IO1, // 5
-+ ASPEED_HICRA_IO2, // 6
-+ ASPEED_HICRA_IO6, // 7
-+ NULL, // NULL termination
-+ },
-+};
-+
-+static struct aspeed_uart_routing_selector io2_sel = {
-+ .dev_attr = ROUTING_ATTR(ASPEED_HICRA_IO2),
-+ .shift = 3,
-+ .mask = 0x7,
-+ .options = {
-+ ASPEED_HICRA_UART2, // 0
-+ ASPEED_HICRA_UART3, // 1
-+ ASPEED_HICRA_UART4, // 2
-+ ASPEED_HICRA_UART5, // 3
-+ ASPEED_HICRA_UART1, // 4
-+ ASPEED_HICRA_IO3, // 5
-+ ASPEED_HICRA_IO4, // 6
-+ ASPEED_HICRA_IO6, // 7
-+ NULL, // NULL termination
-+ },
-+};
-+
-+static struct aspeed_uart_routing_selector io1_sel = {
-+ .dev_attr = ROUTING_ATTR(ASPEED_HICRA_IO1),
-+ .shift = 0,
-+ .mask = 0x7,
-+ .options = {
-+ ASPEED_HICRA_UART1, // 0
-+ ASPEED_HICRA_UART2, // 1
-+ ASPEED_HICRA_UART3, // 2
-+ ASPEED_HICRA_UART4, // 3
-+ ASPEED_HICRA_UART5, // 4
-+ ASPEED_HICRA_IO3, // 5
-+ ASPEED_HICRA_IO4, // 6
-+ ASPEED_HICRA_IO6, // 7
-+ NULL, // NULL termination
-+ },
-+};
-+
-+
-+static struct attribute *aspeed_uart_routing_attrs[] = {
-+ &uart1_sel.dev_attr.attr,
-+ &uart2_sel.dev_attr.attr,
-+ &uart3_sel.dev_attr.attr,
-+ &uart4_sel.dev_attr.attr,
-+ &uart5_sel.dev_attr.attr,
-+ &io1_sel.dev_attr.attr,
-+ &io2_sel.dev_attr.attr,
-+ &io3_sel.dev_attr.attr,
-+ &io4_sel.dev_attr.attr,
-+ &io5_sel.dev_attr.attr,
-+ NULL,
-+};
-+
-+static const struct attribute_group aspeed_uart_routing_attr_group = {
-+ .attrs = aspeed_uart_routing_attrs,
-+};
-+
-+static ssize_t aspeed_uart_routing_show(struct device *dev,
-+ struct device_attribute *attr,
-+ char *buf)
-+{
-+ struct aspeed_uart_routing *uart_routing = dev_get_drvdata(dev);
-+ struct aspeed_uart_routing_selector *sel = to_routing_selector(attr);
-+ int val, pos, len;
-+
-+ val = (readl(uart_routing->regs) >> sel->shift) & sel->mask;
-+
-+ len = 0;
-+ for (pos = 0; sel->options[pos] != NULL; ++pos) {
-+ if (pos == val) {
-+ len += snprintf(buf + len, PAGE_SIZE - 1 - len,
-+ "[%s] ", sel->options[pos]);
-+ } else {
-+ len += snprintf(buf + len, PAGE_SIZE - 1 - len,
-+ "%s ", sel->options[pos]);
-+ }
-+ }
-+
-+ if (val >= pos) {
-+ len += snprintf(buf + len, PAGE_SIZE - 1 - len,
-+ "[unknown(%d)]", val);
-+ }
-+
-+ len += snprintf(buf + len, PAGE_SIZE - 1 - len, "\n");
-+
-+ return len;
-+}
-+
-+static ssize_t aspeed_uart_routing_store(struct device *dev,
-+ struct device_attribute *attr,
-+ const char *buf, size_t count)
-+{
-+ struct aspeed_uart_routing *uart_routing = dev_get_drvdata(dev);
-+ struct aspeed_uart_routing_selector *sel = to_routing_selector(attr);
-+ int val;
-+ u32 reg;
-+
-+ val = match_string(sel->options, -1, buf);
-+ if (val < 0) {
-+ dev_err(dev, "invalid value \"%s\"\n", buf);
-+ return -EINVAL;
-+ }
-+
-+ spin_lock(&uart_routing->lock);
-+ reg = readl(uart_routing->regs);
-+ // Zero out existing value in specified bits.
-+ reg &= ~(sel->mask << sel->shift);
-+ // Set new value in specified bits.
-+ reg |= (val & sel->mask) << sel->shift;
-+ writel(reg, uart_routing->regs);
-+ spin_unlock(&uart_routing->lock);
-+
-+ return count;
-+}
-+
-+static int aspeed_uart_routing_probe(struct platform_device *pdev)
-+{
-+ struct aspeed_uart_routing *uart_routing;
-+ struct resource *res;
-+ int rc;
-+
-+ uart_routing = devm_kzalloc(&pdev->dev,
-+ sizeof(*uart_routing),
-+ GFP_KERNEL);
-+ if (!uart_routing)
-+ return -ENOMEM;
-+
-+ spin_lock_init(&uart_routing->lock);
-+ uart_routing->dev = &pdev->dev;
-+
-+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-+ uart_routing->regs = devm_ioremap_resource(&pdev->dev, res);
-+ if (IS_ERR(uart_routing->regs))
-+ return PTR_ERR(uart_routing->regs);
-+
-+ rc = sysfs_create_group(&uart_routing->dev->kobj,
-+ &aspeed_uart_routing_attr_group);
-+ if (rc < 0)
-+ return rc;
-+
-+ platform_set_drvdata(pdev, uart_routing);
-+
-+ return 0;
-+}
-+
-+static int aspeed_uart_routing_remove(struct platform_device *pdev)
-+{
-+ struct aspeed_uart_routing *uart_routing = platform_get_drvdata(pdev);
-+
-+ sysfs_remove_group(&uart_routing->dev->kobj,
-+ &aspeed_uart_routing_attr_group);
-+
-+ return 0;
-+}
-+
-+static const struct of_device_id aspeed_uart_routing_table[] = {
-+ { .compatible = "aspeed,ast2500-uart-routing" },
-+ { },
-+};
-+
-+static struct platform_driver aspeed_uart_routing_driver = {
-+ .driver = {
-+ .name = "aspeed-uart-routing",
-+ .of_match_table = aspeed_uart_routing_table,
-+ },
-+ .probe = aspeed_uart_routing_probe,
-+ .remove = aspeed_uart_routing_remove,
-+};
-+
-+module_platform_driver(aspeed_uart_routing_driver);
-+
-+MODULE_AUTHOR("Oskar Senft <osk@google.com>");
-+MODULE_LICENSE("GPL v2");
-+MODULE_DESCRIPTION("Driver to configure Aspeed UART routing");
---
-2.25.1
-
generated by cgit v1.2.3 (git 2.39.0) at 2024-06-02 00:23:48 +0300