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authorLinus Torvalds <torvalds@woody.linux-foundation.org>2007-05-05 04:46:27 +0400
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-05-05 04:46:27 +0400
commit8d41f0e8d51742aba5bbcab9acb5238a8578c917 (patch)
treec69e7ffaf2a8598283422d20643154a298d08293 /include
parent8bc8493063f938c932819958a7b5a0d56046bc96 (diff)
parent5b68790cd5e2879067bcbc45b01eeb6081e7d731 (diff)
downloadlinux-8d41f0e8d51742aba5bbcab9acb5238a8578c917.tar.xz
Merge branch 'i2c-for-linus' of git://jdelvare.pck.nerim.net/jdelvare-2.6
* 'i2c-for-linus' of git://jdelvare.pck.nerim.net/jdelvare-2.6: (44 commits) i2c-s3c2410: Fix bug in releasing driver i2c-s3c2410: Fix I2C SDA to SCL setup time i2c: New i2c-tiny-usb bus driver i2c: Documentation update i2c: SPIN_LOCK_UNLOCKED cleanup i2c: Obsolete i2c-ixp2000, i2c-ixp4xx and scx200_i2c i2c: New Simtec I2C bus driver i2c: Bitbanging I2C bus driver using the GPIO API Use menuconfig objects - I2C i2c: Restore i2c_smbus_read_block_data i2c-pxa: Clean transaction stop i2c-algo-bit: Improve debugging i2c-algo-bit: Implement a 50/50 SCL duty cycle i2c-omap: Switch to static adapter numbering i2c: Blackfin Two Wire Interface driver i2c-algo-sgi: Comment and whitespace cleanups i2c: Make i2c_del_driver a void function i2c: Move i2c-isa-only exported symbol declarations i2c: Document i2c_new_device() i2c: Add i2c_new_probed_device() ... Fixed trivial conflict in Documentation/feature-removal-schedule.txt manually. Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include')
-rw-r--r--include/linux/i2c-algo-bit.h7
-rw-r--r--include/linux/i2c-gpio.h38
-rw-r--r--include/linux/i2c-id.h3
-rw-r--r--include/linux/i2c.h123
-rw-r--r--include/linux/pci_ids.h2
-rw-r--r--include/media/ovcamchip.h1
-rw-r--r--include/media/tuner.h1
7 files changed, 151 insertions, 24 deletions
diff --git a/include/linux/i2c-algo-bit.h b/include/linux/i2c-algo-bit.h
index 937da70cb4c4..9ee0f800592f 100644
--- a/include/linux/i2c-algo-bit.h
+++ b/include/linux/i2c-algo-bit.h
@@ -38,11 +38,14 @@ struct i2c_algo_bit_data {
int (*getscl) (void *data);
/* local settings */
- int udelay; /* half-clock-cycle time in microsecs */
- /* i.e. clock is (500 / udelay) KHz */
+ int udelay; /* half clock cycle time in us,
+ minimum 2 us for fast-mode I2C,
+ minimum 5 us for standard-mode I2C and SMBus,
+ maximum 50 us for SMBus */
int timeout; /* in jiffies */
};
int i2c_bit_add_bus(struct i2c_adapter *);
+int i2c_bit_add_numbered_bus(struct i2c_adapter *);
#endif /* _LINUX_I2C_ALGO_BIT_H */
diff --git a/include/linux/i2c-gpio.h b/include/linux/i2c-gpio.h
new file mode 100644
index 000000000000..c1bcb1f1d73b
--- /dev/null
+++ b/include/linux/i2c-gpio.h
@@ -0,0 +1,38 @@
+/*
+ * i2c-gpio interface to platform code
+ *
+ * Copyright (C) 2007 Atmel 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.
+ */
+#ifndef _LINUX_I2C_GPIO_H
+#define _LINUX_I2C_GPIO_H
+
+/**
+ * struct i2c_gpio_platform_data - Platform-dependent data for i2c-gpio
+ * @sda_pin: GPIO pin ID to use for SDA
+ * @scl_pin: GPIO pin ID to use for SCL
+ * @udelay: signal toggle delay. SCL frequency is (500 / udelay) kHz
+ * @timeout: clock stretching timeout in jiffies. If the slave keeps
+ * SCL low for longer than this, the transfer will time out.
+ * @sda_is_open_drain: SDA is configured as open drain, i.e. the pin
+ * isn't actively driven high when setting the output value high.
+ * gpio_get_value() must return the actual pin state even if the
+ * pin is configured as an output.
+ * @scl_is_open_drain: SCL is set up as open drain. Same requirements
+ * as for sda_is_open_drain apply.
+ * @scl_is_output_only: SCL output drivers cannot be turned off.
+ */
+struct i2c_gpio_platform_data {
+ unsigned int sda_pin;
+ unsigned int scl_pin;
+ int udelay;
+ int timeout;
+ unsigned int sda_is_open_drain:1;
+ unsigned int scl_is_open_drain:1;
+ unsigned int scl_is_output_only:1;
+};
+
+#endif /* _LINUX_I2C_GPIO_H */
diff --git a/include/linux/i2c-id.h b/include/linux/i2c-id.h
index 9c21dc793d7b..0e8da684ce68 100644
--- a/include/linux/i2c-id.h
+++ b/include/linux/i2c-id.h
@@ -258,8 +258,9 @@
/* --- MCP107 adapter */
#define I2C_HW_MPC107 0x0d0000
-/* --- Marvell mv64xxx i2c adapter */
+/* --- Embedded adapters */
#define I2C_HW_MV64XXX 0x190000
+#define I2C_HW_BLACKFIN 0x190001 /* ADI Blackfin I2C TWI driver */
/* --- Miscellaneous adapters */
#define I2C_HW_SAA7146 0x060000 /* SAA7146 video decoder bus */
diff --git a/include/linux/i2c.h b/include/linux/i2c.h
index 9428092017e3..cae7d618030c 100644
--- a/include/linux/i2c.h
+++ b/include/linux/i2c.h
@@ -35,11 +35,6 @@
#include <linux/sched.h> /* for completion */
#include <linux/mutex.h>
-/* --- For i2c-isa ---------------------------------------------------- */
-
-extern void i2c_adapter_dev_release(struct device *dev);
-extern struct device_driver i2c_adapter_driver;
-extern struct class i2c_adapter_class;
extern struct bus_type i2c_bus_type;
/* --- General options ------------------------------------------------ */
@@ -87,6 +82,9 @@ extern s32 i2c_smbus_write_byte_data(struct i2c_client * client,
extern s32 i2c_smbus_read_word_data(struct i2c_client * client, u8 command);
extern s32 i2c_smbus_write_word_data(struct i2c_client * client,
u8 command, u16 value);
+/* Returns the number of read bytes */
+extern s32 i2c_smbus_read_block_data(struct i2c_client *client,
+ u8 command, u8 *values);
extern s32 i2c_smbus_write_block_data(struct i2c_client * client,
u8 command, u8 length,
const u8 *values);
@@ -114,7 +112,7 @@ struct i2c_driver {
* can be used by the driver to test if the bus meets its conditions
* & seek for the presence of the chip(s) it supports. If found, it
* registers the client(s) that are on the bus to the i2c admin. via
- * i2c_attach_client.
+ * i2c_attach_client. (LEGACY I2C DRIVERS ONLY)
*/
int (*attach_adapter)(struct i2c_adapter *);
int (*detach_adapter)(struct i2c_adapter *);
@@ -122,10 +120,17 @@ struct i2c_driver {
/* tells the driver that a client is about to be deleted & gives it
* the chance to remove its private data. Also, if the client struct
* has been dynamically allocated by the driver in the function above,
- * it must be freed here.
+ * it must be freed here. (LEGACY I2C DRIVERS ONLY)
*/
int (*detach_client)(struct i2c_client *);
+ /* Standard driver model interfaces, for "new style" i2c drivers.
+ * With the driver model, device enumeration is NEVER done by drivers;
+ * it's done by infrastructure. (NEW STYLE DRIVERS ONLY)
+ */
+ int (*probe)(struct i2c_client *);
+ int (*remove)(struct i2c_client *);
+
/* driver model interfaces that don't relate to enumeration */
void (*shutdown)(struct i2c_client *);
int (*suspend)(struct i2c_client *, pm_message_t mesg);
@@ -141,25 +146,34 @@ struct i2c_driver {
};
#define to_i2c_driver(d) container_of(d, struct i2c_driver, driver)
-#define I2C_NAME_SIZE 50
+#define I2C_NAME_SIZE 20
-/*
- * i2c_client identifies a single device (i.e. chip) that is connected to an
- * i2c bus. The behaviour is defined by the routines of the driver. This
- * function is mainly used for lookup & other admin. functions.
+/**
+ * struct i2c_client - represent an I2C slave device
+ * @addr: Address used on the I2C bus connected to the parent adapter.
+ * @name: Indicates the type of the device, usually a chip name that's
+ * generic enough to hide second-sourcing and compatible revisions.
+ * @dev: Driver model device node for the slave.
+ * @driver_name: Identifies new-style driver used with this device; also
+ * used as the module name for hotplug/coldplug modprobe support.
+ *
+ * An i2c_client identifies a single device (i.e. chip) connected to an
+ * i2c bus. The behaviour is defined by the routines of the driver.
*/
struct i2c_client {
- unsigned int flags; /* div., see below */
+ unsigned short flags; /* div., see below */
unsigned short addr; /* chip address - NOTE: 7bit */
/* addresses are stored in the */
/* _LOWER_ 7 bits */
+ char name[I2C_NAME_SIZE];
struct i2c_adapter *adapter; /* the adapter we sit on */
struct i2c_driver *driver; /* and our access routines */
int usage_count; /* How many accesses currently */
/* to the client */
struct device dev; /* the device structure */
+ int irq; /* irq issued by device (or -1) */
+ char driver_name[KOBJ_NAME_LEN];
struct list_head list;
- char name[I2C_NAME_SIZE];
struct completion released;
};
#define to_i2c_client(d) container_of(d, struct i2c_client, dev)
@@ -179,6 +193,76 @@ static inline void i2c_set_clientdata (struct i2c_client *dev, void *data)
dev_set_drvdata (&dev->dev, data);
}
+/**
+ * struct i2c_board_info - template for device creation
+ * @driver_name: identifies the driver to be bound to the device
+ * @type: optional chip type information, to initialize i2c_client.name
+ * @flags: to initialize i2c_client.flags
+ * @addr: stored in i2c_client.addr
+ * @platform_data: stored in i2c_client.dev.platform_data
+ * @irq: stored in i2c_client.irq
+
+ * I2C doesn't actually support hardware probing, although controllers and
+ * devices may be able to use I2C_SMBUS_QUICK to tell whether or not there's
+ * a device at a given address. Drivers commonly need more information than
+ * that, such as chip type, configuration, associated IRQ, and so on.
+ *
+ * i2c_board_info is used to build tables of information listing I2C devices
+ * that are present. This information is used to grow the driver model tree
+ * for "new style" I2C drivers. For mainboards this is done statically using
+ * i2c_register_board_info(), where @bus_num represents an adapter that isn't
+ * yet available. For add-on boards, i2c_new_device() does this dynamically
+ * with the adapter already known.
+ */
+struct i2c_board_info {
+ char driver_name[KOBJ_NAME_LEN];
+ char type[I2C_NAME_SIZE];
+ unsigned short flags;
+ unsigned short addr;
+ void *platform_data;
+ int irq;
+};
+
+/**
+ * I2C_BOARD_INFO - macro used to list an i2c device and its driver
+ * @driver: identifies the driver to use with the device
+ * @dev_addr: the device's address on the bus.
+ *
+ * This macro initializes essential fields of a struct i2c_board_info,
+ * declaring what has been provided on a particular board. Optional
+ * fields (such as the chip type, its associated irq, or device-specific
+ * platform_data) are provided using conventional syntax.
+ */
+#define I2C_BOARD_INFO(driver,dev_addr) \
+ .driver_name = (driver), .addr = (dev_addr)
+
+
+/* Add-on boards should register/unregister their devices; e.g. a board
+ * with integrated I2C, a config eeprom, sensors, and a codec that's
+ * used in conjunction with the primary hardware.
+ */
+extern struct i2c_client *
+i2c_new_device(struct i2c_adapter *adap, struct i2c_board_info const *info);
+
+/* If you don't know the exact address of an I2C device, use this variant
+ * instead, which can probe for device presence in a list of possible
+ * addresses.
+ */
+extern struct i2c_client *
+i2c_new_probed_device(struct i2c_adapter *adap,
+ struct i2c_board_info *info,
+ unsigned short const *addr_list);
+
+extern void i2c_unregister_device(struct i2c_client *);
+
+/* Mainboard arch_initcall() code should register all its I2C devices.
+ * This is done at arch_initcall time, before declaring any i2c adapters.
+ * Modules for add-on boards must use other calls.
+ */
+extern int
+i2c_register_board_info(int busnum, struct i2c_board_info const *info, unsigned n);
+
+
/*
* The following structs are for those who like to implement new bus drivers:
* i2c_algorithm is the interface to a class of hardware solutions which can
@@ -228,17 +312,14 @@ struct i2c_adapter {
int timeout;
int retries;
struct device dev; /* the adapter device */
- struct class_device class_dev; /* the class device */
int nr;
struct list_head clients;
struct list_head list;
- char name[I2C_NAME_SIZE];
+ char name[48];
struct completion dev_released;
- struct completion class_dev_released;
};
-#define dev_to_i2c_adapter(d) container_of(d, struct i2c_adapter, dev)
-#define class_dev_to_i2c_adapter(d) container_of(d, struct i2c_adapter, class_dev)
+#define to_i2c_adapter(d) container_of(d, struct i2c_adapter, dev)
static inline void *i2c_get_adapdata (struct i2c_adapter *dev)
{
@@ -290,9 +371,10 @@ struct i2c_client_address_data {
*/
extern int i2c_add_adapter(struct i2c_adapter *);
extern int i2c_del_adapter(struct i2c_adapter *);
+extern int i2c_add_numbered_adapter(struct i2c_adapter *);
extern int i2c_register_driver(struct module *, struct i2c_driver *);
-extern int i2c_del_driver(struct i2c_driver *);
+extern void i2c_del_driver(struct i2c_driver *);
static inline int i2c_add_driver(struct i2c_driver *driver)
{
@@ -365,6 +447,7 @@ struct i2c_msg {
#define I2C_M_REV_DIR_ADDR 0x2000
#define I2C_M_IGNORE_NAK 0x1000
#define I2C_M_NO_RD_ACK 0x0800
+#define I2C_M_RECV_LEN 0x0400 /* length will be first received byte */
__u16 len; /* msg length */
__u8 *buf; /* pointer to msg data */
};
diff --git a/include/linux/pci_ids.h b/include/linux/pci_ids.h
index 1b0ddbb8a804..5a48e963d06b 100644
--- a/include/linux/pci_ids.h
+++ b/include/linux/pci_ids.h
@@ -1213,11 +1213,13 @@
#define PCI_DEVICE_ID_NVIDIA_NVENET_16 0x03E5
#define PCI_DEVICE_ID_NVIDIA_NVENET_17 0x03E6
#define PCI_DEVICE_ID_NVIDIA_NFORCE_MCP61_SATA 0x03E7
+#define PCI_DEVICE_ID_NVIDIA_NFORCE_MCP61_SMBUS 0x03EB
#define PCI_DEVICE_ID_NVIDIA_NFORCE_MCP61_IDE 0x03EC
#define PCI_DEVICE_ID_NVIDIA_NVENET_18 0x03EE
#define PCI_DEVICE_ID_NVIDIA_NVENET_19 0x03EF
#define PCI_DEVICE_ID_NVIDIA_NFORCE_MCP61_SATA2 0x03F6
#define PCI_DEVICE_ID_NVIDIA_NFORCE_MCP61_SATA3 0x03F7
+#define PCI_DEVICE_ID_NVIDIA_NFORCE_MCP65_SMBUS 0x0446
#define PCI_DEVICE_ID_NVIDIA_NFORCE_MCP65_IDE 0x0448
#define PCI_DEVICE_ID_NVIDIA_NVENET_20 0x0450
#define PCI_DEVICE_ID_NVIDIA_NVENET_21 0x0451
diff --git a/include/media/ovcamchip.h b/include/media/ovcamchip.h
index 0f43451f8bb3..05b9569ef1c8 100644
--- a/include/media/ovcamchip.h
+++ b/include/media/ovcamchip.h
@@ -16,7 +16,6 @@
#include <linux/videodev.h>
#include <media/v4l2-common.h>
-#include <linux/i2c.h>
/* --------------------------------- */
/* ENUMERATIONS */
diff --git a/include/media/tuner.h b/include/media/tuner.h
index a41ac41113ac..6dcf3c45707d 100644
--- a/include/media/tuner.h
+++ b/include/media/tuner.h
@@ -23,6 +23,7 @@
#define _TUNER_H
#include <linux/videodev2.h>
+#include <linux/i2c.h>
#include <media/tuner-types.h>
extern int tuner_debug;