RC11 preliminary update - includes
git-svn-id: svn://kolibrios.org@1964 a494cfbc-eb01-0410-851d-a64ba20cac60
This commit is contained in:
Sergey Semyonov (Serge)
@@ -26,27 +26,22 @@
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#ifndef _LINUX_I2C_H
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#define _LINUX_I2C_H
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#include <types.h>
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#include <list.h>
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#include <linux/types.h>
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#ifdef __KERNEL__
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#include <linux/module.h>
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#include <linux/i2c-id.h>
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#include <linux/mod_devicetable.h>
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#define I2C_NAME_SIZE 20
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#define I2C_MODULE_PREFIX "i2c:"
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struct i2c_device_id {
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char name[I2C_NAME_SIZE];
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u32 driver_data /* Data private to the driver */
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__attribute__((aligned(sizeof(u32))));
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};
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/* --- General options ------------------------------------------------ */
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struct i2c_msg;
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struct i2c_algorithm;
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struct i2c_adapter;
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struct i2c_client;
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struct i2c_driver;
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union i2c_smbus_data;
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struct i2c_board_info;
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/* Transfer num messages.
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@@ -64,6 +59,7 @@ extern int i2c_transfer(struct i2c_adapter *adap, struct i2c_msg *msgs,
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* @shutdown: Callback for device shutdown
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* @suspend: Callback for device suspend
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* @resume: Callback for device resume
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* @alert: Alert callback, for example for the SMBus alert protocol
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* @command: Callback for bus-wide signaling (optional)
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* @driver: Device driver model driver
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* @id_table: List of I2C devices supported by this driver
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@@ -95,8 +91,8 @@ struct i2c_driver {
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unsigned int class;
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/* Notifies the driver that a new bus has appeared or is about to be
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* removed. You should avoid using this if you can, it will probably
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* be removed in a near future.
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* removed. You should avoid using this, it will be removed in a
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* near future.
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*/
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int (*attach_adapter)(struct i2c_adapter *);
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int (*detach_adapter)(struct i2c_adapter *);
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@@ -158,14 +154,59 @@ struct i2c_client {
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char name[I2C_NAME_SIZE];
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struct i2c_adapter *adapter; /* the adapter we sit on */
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struct i2c_driver *driver; /* and our access routines */
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// struct device dev; /* the device structure */
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int irq; /* irq issued by device (or -1) */
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struct device dev; /* the device structure */
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int irq; /* irq issued by device */
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struct list_head detected;
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};
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#define to_i2c_client(d) container_of(d, struct i2c_client, dev)
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extern struct i2c_client *i2c_verify_client(struct device *dev);
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/**
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* struct i2c_board_info - template for device creation
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* @type: chip type, to initialize i2c_client.name
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* @flags: to initialize i2c_client.flags
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* @addr: stored in i2c_client.addr
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* @platform_data: stored in i2c_client.dev.platform_data
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* @archdata: copied into i2c_client.dev.archdata
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* @of_node: pointer to OpenFirmware device node
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* @irq: stored in i2c_client.irq
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*
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* I2C doesn't actually support hardware probing, although controllers and
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* devices may be able to use I2C_SMBUS_QUICK to tell whether or not there's
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* a device at a given address. Drivers commonly need more information than
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* that, such as chip type, configuration, associated IRQ, and so on.
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*
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* i2c_board_info is used to build tables of information listing I2C devices
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* that are present. This information is used to grow the driver model tree.
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* For mainboards this is done statically using i2c_register_board_info();
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* bus numbers identify adapters that aren't yet available. For add-on boards,
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* i2c_new_device() does this dynamically with the adapter already known.
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*/
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struct i2c_board_info {
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char type[I2C_NAME_SIZE];
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unsigned short flags;
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unsigned short addr;
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void *platform_data;
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struct dev_archdata *archdata;
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#ifdef CONFIG_OF
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struct device_node *of_node;
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#endif
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int irq;
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};
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/**
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* I2C_BOARD_INFO - macro used to list an i2c device and its address
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* @dev_type: identifies the device type
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* @dev_addr: the device's address on the bus.
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*
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* This macro initializes essential fields of a struct i2c_board_info,
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* declaring what has been provided on a particular board. Optional
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* fields (such as associated irq, or device-specific platform_data)
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* are provided using conventional syntax.
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*/
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#define I2C_BOARD_INFO(dev_type, dev_addr) \
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.type = dev_type, .addr = (dev_addr)
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/*
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* The following structs are for those who like to implement new bus drivers:
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* i2c_algorithm is the interface to a class of hardware solutions which can
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@@ -194,7 +235,7 @@ struct i2c_algorithm {
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* with the access algorithms necessary to access it.
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*/
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struct i2c_adapter {
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unsigned int id;
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struct module *owner;
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unsigned int class; /* classes to allow probing for */
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const struct i2c_algorithm *algo; /* the algorithm to access the bus */
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void *algo_data;
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@@ -211,7 +252,7 @@ struct i2c_adapter {
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};
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#define to_i2c_adapter(d) container_of(d, struct i2c_adapter, dev)
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static inline void *i2c_get_adapdata(struct i2c_adapter *dev)
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static inline void *i2c_get_adapdata(const struct i2c_adapter *dev)
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{
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return dev_get_drvdata(&dev->dev);
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}
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@@ -221,6 +262,10 @@ static inline void i2c_set_adapdata(struct i2c_adapter *dev, void *data)
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dev_set_drvdata(&dev->dev, data);
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}
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/* Adapter locking functions, exported for shared pin cases */
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void i2c_lock_adapter(struct i2c_adapter *);
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void i2c_unlock_adapter(struct i2c_adapter *);
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/*flags for the client struct: */
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#define I2C_CLIENT_PEC 0x04 /* Use Packet Error Checking */
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#define I2C_CLIENT_TEN 0x10 /* we have a ten bit chip address */
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@@ -229,10 +274,8 @@ static inline void i2c_set_adapdata(struct i2c_adapter *dev, void *data)
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/* i2c adapter classes (bitmask) */
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#define I2C_CLASS_HWMON (1<<0) /* lm_sensors, ... */
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#define I2C_CLASS_TV_ANALOG (1<<1) /* bttv + friends */
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#define I2C_CLASS_TV_DIGITAL (1<<2) /* dvb cards */
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#define I2C_CLASS_DDC (1<<3) /* DDC bus on graphics adapters */
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#define I2C_CLASS_SPD (1<<7) /* SPD EEPROMs and similar */
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#define I2C_CLASS_SPD (1<<7) /* Memory modules */
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/* Internal numbers to terminate lists */
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#define I2C_CLIENT_END 0xfffeU
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@@ -245,6 +288,7 @@ static inline void i2c_set_adapdata(struct i2c_adapter *dev, void *data)
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((const unsigned short []){ addr, ## addrs, I2C_CLIENT_END })
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#endif /* __KERNEL__ */
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/**
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* struct i2c_msg - an I2C transaction segment beginning with START
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* @addr: Slave address, either seven or ten bits. When this is a ten
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@@ -282,8 +326,8 @@ static inline void i2c_set_adapdata(struct i2c_adapter *dev, void *data)
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* need (one or more of IGNORE_NAK, NO_RD_ACK, NOSTART, and REV_DIR_ADDR).
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*/
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struct i2c_msg {
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u16 addr; /* slave address */
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u16 flags;
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__u16 addr; /* slave address */
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__u16 flags;
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#define I2C_M_TEN 0x0010 /* this is a ten bit chip address */
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#define I2C_M_RD 0x0001 /* read data, from slave to master */
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#define I2C_M_NOSTART 0x4000 /* if I2C_FUNC_PROTOCOL_MANGLING */
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@@ -291,8 +335,8 @@ struct i2c_msg {
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#define I2C_M_IGNORE_NAK 0x1000 /* if I2C_FUNC_PROTOCOL_MANGLING */
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#define I2C_M_NO_RD_ACK 0x0800 /* if I2C_FUNC_PROTOCOL_MANGLING */
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#define I2C_M_RECV_LEN 0x0400 /* length will be first received byte */
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u16 len; /* msg length */
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u8 *buf; /* pointer to msg data */
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__u16 len; /* msg length */
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__u8 *buf; /* pointer to msg data */
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};
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/* To determine what functionality is present */
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