diff options
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/i2c-algo-bit.h | 7 | ||||
| -rw-r--r-- | include/linux/i2c-gpio.h | 38 | ||||
| -rw-r--r-- | include/linux/i2c-id.h | 3 | ||||
| -rw-r--r-- | include/linux/i2c.h | 123 | ||||
| -rw-r--r-- | include/linux/pci_ids.h | 2 |
5 files changed, 150 insertions, 23 deletions
diff --git a/include/linux/i2c-algo-bit.h b/include/linux/i2c-algo-bit.h index 937da70cb4c..9ee0f800592 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 00000000000..c1bcb1f1d73 --- /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 9c21dc793d7..0e8da684ce6 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 9428092017e..cae7d618030 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 1b0ddbb8a80..5a48e963d06 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 |