595 lines
23 KiB
C
595 lines
23 KiB
C
![]() |
/* ------------------------------------------------------------------------- */
|
|||
|
/* */
|
|||
|
/* i2c.h - definitions for the i2c-bus interface */
|
|||
|
/* */
|
|||
|
/* ------------------------------------------------------------------------- */
|
|||
|
/* Copyright (C) 1995-2000 Simon G. Vogl
|
|||
|
|
|||
|
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., 675 Mass Ave, Cambridge, MA 02139, USA. */
|
|||
|
/* ------------------------------------------------------------------------- */
|
|||
|
|
|||
|
/* With some changes from Ky<4B>sti M<>lkki <kmalkki@cc.hut.fi> and
|
|||
|
Frodo Looijaard <frodol@dds.nl> */
|
|||
|
|
|||
|
/* $Id: i2c.h,v 1.68 2003/01/21 08:08:16 kmalkki Exp $ */
|
|||
|
|
|||
|
#ifndef _LINUX_I2C_H
|
|||
|
#define _LINUX_I2C_H
|
|||
|
|
|||
|
#include <linux/module.h>
|
|||
|
#include <linux/types.h>
|
|||
|
#include <linux/i2c-id.h>
|
|||
|
#include <linux/device.h> /* for struct device */
|
|||
|
#include <asm/semaphore.h>
|
|||
|
|
|||
|
/* --- General options ------------------------------------------------ */
|
|||
|
|
|||
|
struct i2c_msg;
|
|||
|
struct i2c_algorithm;
|
|||
|
struct i2c_adapter;
|
|||
|
struct i2c_client;
|
|||
|
struct i2c_driver;
|
|||
|
struct i2c_client_address_data;
|
|||
|
union i2c_smbus_data;
|
|||
|
|
|||
|
/*
|
|||
|
* The master routines are the ones normally used to transmit data to devices
|
|||
|
* on a bus (or read from them). Apart from two basic transfer functions to
|
|||
|
* transmit one message at a time, a more complex version can be used to
|
|||
|
* transmit an arbitrary number of messages without interruption.
|
|||
|
*/
|
|||
|
extern int i2c_master_send(struct i2c_client *,const char* ,int);
|
|||
|
extern int i2c_master_recv(struct i2c_client *,char* ,int);
|
|||
|
|
|||
|
/* Transfer num messages.
|
|||
|
*/
|
|||
|
extern int i2c_transfer(struct i2c_adapter *adap, struct i2c_msg *msgs, int num);
|
|||
|
|
|||
|
/*
|
|||
|
* Some adapter types (i.e. PCF 8584 based ones) may support slave behaviuor.
|
|||
|
* This is not tested/implemented yet and will change in the future.
|
|||
|
*/
|
|||
|
extern int i2c_slave_send(struct i2c_client *,char*,int);
|
|||
|
extern int i2c_slave_recv(struct i2c_client *,char*,int);
|
|||
|
|
|||
|
|
|||
|
|
|||
|
/* This is the very generalized SMBus access routine. You probably do not
|
|||
|
want to use this, though; one of the functions below may be much easier,
|
|||
|
and probably just as fast.
|
|||
|
Note that we use i2c_adapter here, because you do not need a specific
|
|||
|
smbus adapter to call this function. */
|
|||
|
extern s32 i2c_smbus_xfer (struct i2c_adapter * adapter, u16 addr,
|
|||
|
unsigned short flags,
|
|||
|
char read_write, u8 command, int size,
|
|||
|
union i2c_smbus_data * data);
|
|||
|
|
|||
|
/* Now follow the 'nice' access routines. These also document the calling
|
|||
|
conventions of smbus_access. */
|
|||
|
|
|||
|
extern s32 i2c_smbus_write_quick(struct i2c_client * client, u8 value);
|
|||
|
extern s32 i2c_smbus_read_byte(struct i2c_client * client);
|
|||
|
extern s32 i2c_smbus_write_byte(struct i2c_client * client, u8 value);
|
|||
|
extern s32 i2c_smbus_read_byte_data(struct i2c_client * client, u8 command);
|
|||
|
extern s32 i2c_smbus_write_byte_data(struct i2c_client * client,
|
|||
|
u8 command, u8 value);
|
|||
|
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 bytes transferred */
|
|||
|
extern s32 i2c_smbus_write_block_data(struct i2c_client * client,
|
|||
|
u8 command, u8 length,
|
|||
|
u8 *values);
|
|||
|
extern s32 i2c_smbus_read_i2c_block_data(struct i2c_client * client,
|
|||
|
u8 command, u8 *values);
|
|||
|
|
|||
|
/*
|
|||
|
* A driver is capable of handling one or more physical devices present on
|
|||
|
* I2C adapters. This information is used to inform the driver of adapter
|
|||
|
* events.
|
|||
|
*/
|
|||
|
|
|||
|
struct i2c_driver {
|
|||
|
struct module *owner;
|
|||
|
char name[32];
|
|||
|
int id;
|
|||
|
unsigned int class;
|
|||
|
unsigned int flags; /* div., see below */
|
|||
|
|
|||
|
/* Notifies the driver that a new bus has appeared. This routine
|
|||
|
* 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.
|
|||
|
*/
|
|||
|
int (*attach_adapter)(struct i2c_adapter *);
|
|||
|
int (*detach_adapter)(struct i2c_adapter *);
|
|||
|
|
|||
|
/* 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.
|
|||
|
*/
|
|||
|
int (*detach_client)(struct i2c_client *);
|
|||
|
|
|||
|
/* a ioctl like command that can be used to perform specific functions
|
|||
|
* with the device.
|
|||
|
*/
|
|||
|
int (*command)(struct i2c_client *client,unsigned int cmd, void *arg);
|
|||
|
|
|||
|
struct device_driver driver;
|
|||
|
struct list_head list;
|
|||
|
};
|
|||
|
#define to_i2c_driver(d) container_of(d, struct i2c_driver, driver)
|
|||
|
|
|||
|
#define I2C_NAME_SIZE 50
|
|||
|
|
|||
|
/*
|
|||
|
* 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 {
|
|||
|
unsigned int flags; /* div., see below */
|
|||
|
unsigned int addr; /* chip address - NOTE: 7bit */
|
|||
|
/* addresses are stored in the */
|
|||
|
/* _LOWER_ 7 bits of this char */
|
|||
|
/* addr: unsigned int to make lm_sensors i2c-isa adapter work
|
|||
|
more cleanly. It does not take any more memory space, due to
|
|||
|
alignment considerations */
|
|||
|
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 */
|
|||
|
struct list_head list;
|
|||
|
char name[I2C_NAME_SIZE];
|
|||
|
struct completion released;
|
|||
|
};
|
|||
|
#define to_i2c_client(d) container_of(d, struct i2c_client, dev)
|
|||
|
|
|||
|
static inline void *i2c_get_clientdata (struct i2c_client *dev)
|
|||
|
{
|
|||
|
return dev_get_drvdata (&dev->dev);
|
|||
|
}
|
|||
|
|
|||
|
static inline void i2c_set_clientdata (struct i2c_client *dev, void *data)
|
|||
|
{
|
|||
|
dev_set_drvdata (&dev->dev, data);
|
|||
|
}
|
|||
|
|
|||
|
#define I2C_DEVNAME(str) .name = str
|
|||
|
|
|||
|
static inline char *i2c_clientname(struct i2c_client *c)
|
|||
|
{
|
|||
|
return &c->name[0];
|
|||
|
}
|
|||
|
|
|||
|
/*
|
|||
|
* 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
|
|||
|
* be addressed using the same bus algorithms - i.e. bit-banging or the PCF8584
|
|||
|
* to name two of the most common.
|
|||
|
*/
|
|||
|
struct i2c_algorithm {
|
|||
|
char name[32]; /* textual description */
|
|||
|
unsigned int id;
|
|||
|
|
|||
|
/* If an adapter algorithm can't do I2C-level access, set master_xfer
|
|||
|
to NULL. If an adapter algorithm can do SMBus access, set
|
|||
|
smbus_xfer. If set to NULL, the SMBus protocol is simulated
|
|||
|
using common I2C messages */
|
|||
|
int (*master_xfer)(struct i2c_adapter *adap,struct i2c_msg *msgs,
|
|||
|
int num);
|
|||
|
int (*smbus_xfer) (struct i2c_adapter *adap, u16 addr,
|
|||
|
unsigned short flags, char read_write,
|
|||
|
u8 command, int size, union i2c_smbus_data * data);
|
|||
|
|
|||
|
/* --- these optional/future use for some adapter types.*/
|
|||
|
int (*slave_send)(struct i2c_adapter *,char*,int);
|
|||
|
int (*slave_recv)(struct i2c_adapter *,char*,int);
|
|||
|
|
|||
|
/* --- ioctl like call to set div. parameters. */
|
|||
|
int (*algo_control)(struct i2c_adapter *, unsigned int, unsigned long);
|
|||
|
|
|||
|
/* To determine what the adapter supports */
|
|||
|
u32 (*functionality) (struct i2c_adapter *);
|
|||
|
};
|
|||
|
|
|||
|
/*
|
|||
|
* i2c_adapter is the structure used to identify a physical i2c bus along
|
|||
|
* with the access algorithms necessary to access it.
|
|||
|
*/
|
|||
|
struct i2c_adapter {
|
|||
|
struct module *owner;
|
|||
|
unsigned int id;/* == is algo->id | hwdep.struct->id, */
|
|||
|
/* for registered values see below */
|
|||
|
unsigned int class;
|
|||
|
struct i2c_algorithm *algo;/* the algorithm to access the bus */
|
|||
|
void *algo_data;
|
|||
|
|
|||
|
/* --- administration stuff. */
|
|||
|
int (*client_register)(struct i2c_client *);
|
|||
|
int (*client_unregister)(struct i2c_client *);
|
|||
|
|
|||
|
/* data fields that are valid for all devices */
|
|||
|
struct semaphore bus_lock;
|
|||
|
struct semaphore clist_lock;
|
|||
|
|
|||
|
int timeout;
|
|||
|
int retries;
|
|||
|
struct device dev; /* the adapter device */
|
|||
|
struct class_device class_dev; /* the class device */
|
|||
|
|
|||
|
#ifdef CONFIG_PROC_FS
|
|||
|
/* No need to set this when you initialize the adapter */
|
|||
|
int inode;
|
|||
|
#endif /* def CONFIG_PROC_FS */
|
|||
|
|
|||
|
int nr;
|
|||
|
struct list_head clients;
|
|||
|
struct list_head list;
|
|||
|
char name[I2C_NAME_SIZE];
|
|||
|
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)
|
|||
|
|
|||
|
static inline void *i2c_get_adapdata (struct i2c_adapter *dev)
|
|||
|
{
|
|||
|
return dev_get_drvdata (&dev->dev);
|
|||
|
}
|
|||
|
|
|||
|
static inline void i2c_set_adapdata (struct i2c_adapter *dev, void *data)
|
|||
|
{
|
|||
|
dev_set_drvdata (&dev->dev, data);
|
|||
|
}
|
|||
|
|
|||
|
/*flags for the driver struct: */
|
|||
|
#define I2C_DF_NOTIFY 0x01 /* notify on bus (de/a)ttaches */
|
|||
|
#if 0
|
|||
|
/* this flag is gone -- there is a (optional) driver->detach_adapter
|
|||
|
* callback now which can be used instead */
|
|||
|
# define I2C_DF_DUMMY 0x02
|
|||
|
#endif
|
|||
|
|
|||
|
/*flags for the client struct: */
|
|||
|
#define I2C_CLIENT_ALLOW_USE 0x01 /* Client allows access */
|
|||
|
#define I2C_CLIENT_ALLOW_MULTIPLE_USE 0x02 /* Allow multiple access-locks */
|
|||
|
/* on an i2c_client */
|
|||
|
#define I2C_CLIENT_PEC 0x04 /* Use Packet Error Checking */
|
|||
|
#define I2C_CLIENT_TEN 0x10 /* we have a ten bit chip address */
|
|||
|
/* Must equal I2C_M_TEN below */
|
|||
|
|
|||
|
/* i2c adapter classes (bitmask) */
|
|||
|
#define I2C_CLASS_HWMON (1<<0) /* lm_sensors, ... */
|
|||
|
#define I2C_CLASS_TV_ANALOG (1<<1) /* bttv + friends */
|
|||
|
#define I2C_CLASS_TV_DIGITAL (1<<2) /* dvb cards */
|
|||
|
#define I2C_CLASS_DDC (1<<3) /* i2c-matroxfb ? */
|
|||
|
#define I2C_CLASS_CAM_ANALOG (1<<4) /* camera with analog CCD */
|
|||
|
#define I2C_CLASS_CAM_DIGITAL (1<<5) /* most webcams */
|
|||
|
#define I2C_CLASS_SOUND (1<<6) /* sound devices */
|
|||
|
#define I2C_CLASS_ALL (UINT_MAX) /* all of the above */
|
|||
|
|
|||
|
/* i2c_client_address_data is the struct for holding default client
|
|||
|
* addresses for a driver and for the parameters supplied on the
|
|||
|
* command line
|
|||
|
*/
|
|||
|
struct i2c_client_address_data {
|
|||
|
unsigned short *normal_i2c;
|
|||
|
unsigned short *normal_i2c_range;
|
|||
|
unsigned short *probe;
|
|||
|
unsigned short *probe_range;
|
|||
|
unsigned short *ignore;
|
|||
|
unsigned short *ignore_range;
|
|||
|
unsigned short *force;
|
|||
|
};
|
|||
|
|
|||
|
/* Internal numbers to terminate lists */
|
|||
|
#define I2C_CLIENT_END 0xfffeU
|
|||
|
#define I2C_CLIENT_ISA_END 0xfffefffeU
|
|||
|
|
|||
|
/* The numbers to use to set I2C bus address */
|
|||
|
#define ANY_I2C_BUS 0xffff
|
|||
|
#define ANY_I2C_ISA_BUS 9191
|
|||
|
|
|||
|
|
|||
|
/* ----- functions exported by i2c.o */
|
|||
|
|
|||
|
/* administration...
|
|||
|
*/
|
|||
|
extern int i2c_add_adapter(struct i2c_adapter *);
|
|||
|
extern int i2c_del_adapter(struct i2c_adapter *);
|
|||
|
|
|||
|
extern int i2c_add_driver(struct i2c_driver *);
|
|||
|
extern int i2c_del_driver(struct i2c_driver *);
|
|||
|
|
|||
|
extern int i2c_attach_client(struct i2c_client *);
|
|||
|
extern int i2c_detach_client(struct i2c_client *);
|
|||
|
|
|||
|
/* New function: This is to get an i2c_client-struct for controlling the
|
|||
|
client either by using i2c_control-function or having the
|
|||
|
client-module export functions that can be used with the i2c_client
|
|||
|
-struct. */
|
|||
|
extern struct i2c_client *i2c_get_client(int driver_id, int adapter_id,
|
|||
|
struct i2c_client *prev);
|
|||
|
|
|||
|
/* Should be used with new function
|
|||
|
extern struct i2c_client *i2c_get_client(int,int,struct i2c_client *);
|
|||
|
to make sure that client-struct is valid and that it is okay to access
|
|||
|
the i2c-client.
|
|||
|
returns -EACCES if client doesn't allow use (default)
|
|||
|
returns -EBUSY if client doesn't allow multiple use (default) and
|
|||
|
usage_count >0 */
|
|||
|
extern int i2c_use_client(struct i2c_client *);
|
|||
|
extern int i2c_release_client(struct i2c_client *);
|
|||
|
|
|||
|
/* call the i2c_client->command() of all attached clients with
|
|||
|
* the given arguments */
|
|||
|
extern void i2c_clients_command(struct i2c_adapter *adap,
|
|||
|
unsigned int cmd, void *arg);
|
|||
|
|
|||
|
/* returns -EBUSY if address has been taken, 0 if not. Note that the only
|
|||
|
other place at which this is called is within i2c_attach_client; so
|
|||
|
you can cheat by simply not registering. Not recommended, of course! */
|
|||
|
extern int i2c_check_addr (struct i2c_adapter *adapter, int addr);
|
|||
|
|
|||
|
/* Detect function. It iterates over all possible addresses itself.
|
|||
|
* It will only call found_proc if some client is connected at the
|
|||
|
* specific address (unless a 'force' matched);
|
|||
|
*/
|
|||
|
extern int i2c_probe(struct i2c_adapter *adapter,
|
|||
|
struct i2c_client_address_data *address_data,
|
|||
|
int (*found_proc) (struct i2c_adapter *, int, int));
|
|||
|
|
|||
|
/* An ioctl like call to set div. parameters of the adapter.
|
|||
|
*/
|
|||
|
extern int i2c_control(struct i2c_client *,unsigned int, unsigned long);
|
|||
|
|
|||
|
/* This call returns a unique low identifier for each registered adapter,
|
|||
|
* or -1 if the adapter was not registered.
|
|||
|
*/
|
|||
|
extern int i2c_adapter_id(struct i2c_adapter *adap);
|
|||
|
extern struct i2c_adapter* i2c_get_adapter(int id);
|
|||
|
extern void i2c_put_adapter(struct i2c_adapter *adap);
|
|||
|
|
|||
|
|
|||
|
/* Return the functionality mask */
|
|||
|
static inline u32 i2c_get_functionality(struct i2c_adapter *adap)
|
|||
|
{
|
|||
|
return adap->algo->functionality(adap);
|
|||
|
}
|
|||
|
|
|||
|
/* Return 1 if adapter supports everything we need, 0 if not. */
|
|||
|
static inline int i2c_check_functionality(struct i2c_adapter *adap, u32 func)
|
|||
|
{
|
|||
|
return (func & i2c_get_functionality(adap)) == func;
|
|||
|
}
|
|||
|
|
|||
|
/*
|
|||
|
* I2C Message - used for pure i2c transaction, also from /dev interface
|
|||
|
*/
|
|||
|
struct i2c_msg {
|
|||
|
__u16 addr; /* slave address */
|
|||
|
__u16 flags;
|
|||
|
#define I2C_M_TEN 0x10 /* we have a ten bit chip address */
|
|||
|
#define I2C_M_RD 0x01
|
|||
|
#define I2C_M_NOSTART 0x4000
|
|||
|
#define I2C_M_REV_DIR_ADDR 0x2000
|
|||
|
#define I2C_M_IGNORE_NAK 0x1000
|
|||
|
#define I2C_M_NO_RD_ACK 0x0800
|
|||
|
__u16 len; /* msg length */
|
|||
|
__u8 *buf; /* pointer to msg data */
|
|||
|
};
|
|||
|
|
|||
|
/* To determine what functionality is present */
|
|||
|
|
|||
|
#define I2C_FUNC_I2C 0x00000001
|
|||
|
#define I2C_FUNC_10BIT_ADDR 0x00000002
|
|||
|
#define I2C_FUNC_PROTOCOL_MANGLING 0x00000004 /* I2C_M_{REV_DIR_ADDR,NOSTART,..} */
|
|||
|
#define I2C_FUNC_SMBUS_HWPEC_CALC 0x00000008 /* SMBus 2.0 */
|
|||
|
#define I2C_FUNC_SMBUS_READ_WORD_DATA_PEC 0x00000800 /* SMBus 2.0 */
|
|||
|
#define I2C_FUNC_SMBUS_WRITE_WORD_DATA_PEC 0x00001000 /* SMBus 2.0 */
|
|||
|
#define I2C_FUNC_SMBUS_PROC_CALL_PEC 0x00002000 /* SMBus 2.0 */
|
|||
|
#define I2C_FUNC_SMBUS_BLOCK_PROC_CALL_PEC 0x00004000 /* SMBus 2.0 */
|
|||
|
#define I2C_FUNC_SMBUS_BLOCK_PROC_CALL 0x00008000 /* SMBus 2.0 */
|
|||
|
#define I2C_FUNC_SMBUS_QUICK 0x00010000
|
|||
|
#define I2C_FUNC_SMBUS_READ_BYTE 0x00020000
|
|||
|
#define I2C_FUNC_SMBUS_WRITE_BYTE 0x00040000
|
|||
|
#define I2C_FUNC_SMBUS_READ_BYTE_DATA 0x00080000
|
|||
|
#define I2C_FUNC_SMBUS_WRITE_BYTE_DATA 0x00100000
|
|||
|
#define I2C_FUNC_SMBUS_READ_WORD_DATA 0x00200000
|
|||
|
#define I2C_FUNC_SMBUS_WRITE_WORD_DATA 0x00400000
|
|||
|
#define I2C_FUNC_SMBUS_PROC_CALL 0x00800000
|
|||
|
#define I2C_FUNC_SMBUS_READ_BLOCK_DATA 0x01000000
|
|||
|
#define I2C_FUNC_SMBUS_WRITE_BLOCK_DATA 0x02000000
|
|||
|
#define I2C_FUNC_SMBUS_READ_I2C_BLOCK 0x04000000 /* I2C-like block xfer */
|
|||
|
#define I2C_FUNC_SMBUS_WRITE_I2C_BLOCK 0x08000000 /* w/ 1-byte reg. addr. */
|
|||
|
#define I2C_FUNC_SMBUS_READ_I2C_BLOCK_2 0x10000000 /* I2C-like block xfer */
|
|||
|
#define I2C_FUNC_SMBUS_WRITE_I2C_BLOCK_2 0x20000000 /* w/ 2-byte reg. addr. */
|
|||
|
#define I2C_FUNC_SMBUS_READ_BLOCK_DATA_PEC 0x40000000 /* SMBus 2.0 */
|
|||
|
#define I2C_FUNC_SMBUS_WRITE_BLOCK_DATA_PEC 0x80000000 /* SMBus 2.0 */
|
|||
|
|
|||
|
#define I2C_FUNC_SMBUS_BYTE (I2C_FUNC_SMBUS_READ_BYTE | \
|
|||
|
I2C_FUNC_SMBUS_WRITE_BYTE)
|
|||
|
#define I2C_FUNC_SMBUS_BYTE_DATA (I2C_FUNC_SMBUS_READ_BYTE_DATA | \
|
|||
|
I2C_FUNC_SMBUS_WRITE_BYTE_DATA)
|
|||
|
#define I2C_FUNC_SMBUS_WORD_DATA (I2C_FUNC_SMBUS_READ_WORD_DATA | \
|
|||
|
I2C_FUNC_SMBUS_WRITE_WORD_DATA)
|
|||
|
#define I2C_FUNC_SMBUS_BLOCK_DATA (I2C_FUNC_SMBUS_READ_BLOCK_DATA | \
|
|||
|
I2C_FUNC_SMBUS_WRITE_BLOCK_DATA)
|
|||
|
#define I2C_FUNC_SMBUS_I2C_BLOCK (I2C_FUNC_SMBUS_READ_I2C_BLOCK | \
|
|||
|
I2C_FUNC_SMBUS_WRITE_I2C_BLOCK)
|
|||
|
#define I2C_FUNC_SMBUS_I2C_BLOCK_2 (I2C_FUNC_SMBUS_READ_I2C_BLOCK_2 | \
|
|||
|
I2C_FUNC_SMBUS_WRITE_I2C_BLOCK_2)
|
|||
|
#define I2C_FUNC_SMBUS_BLOCK_DATA_PEC (I2C_FUNC_SMBUS_READ_BLOCK_DATA_PEC | \
|
|||
|
I2C_FUNC_SMBUS_WRITE_BLOCK_DATA_PEC)
|
|||
|
#define I2C_FUNC_SMBUS_WORD_DATA_PEC (I2C_FUNC_SMBUS_READ_WORD_DATA_PEC | \
|
|||
|
I2C_FUNC_SMBUS_WRITE_WORD_DATA_PEC)
|
|||
|
|
|||
|
#define I2C_FUNC_SMBUS_READ_BYTE_PEC I2C_FUNC_SMBUS_READ_BYTE_DATA
|
|||
|
#define I2C_FUNC_SMBUS_WRITE_BYTE_PEC I2C_FUNC_SMBUS_WRITE_BYTE_DATA
|
|||
|
#define I2C_FUNC_SMBUS_READ_BYTE_DATA_PEC I2C_FUNC_SMBUS_READ_WORD_DATA
|
|||
|
#define I2C_FUNC_SMBUS_WRITE_BYTE_DATA_PEC I2C_FUNC_SMBUS_WRITE_WORD_DATA
|
|||
|
#define I2C_FUNC_SMBUS_BYTE_PEC I2C_FUNC_SMBUS_BYTE_DATA
|
|||
|
#define I2C_FUNC_SMBUS_BYTE_DATA_PEC I2C_FUNC_SMBUS_WORD_DATA
|
|||
|
|
|||
|
#define I2C_FUNC_SMBUS_EMUL (I2C_FUNC_SMBUS_QUICK | \
|
|||
|
I2C_FUNC_SMBUS_BYTE | \
|
|||
|
I2C_FUNC_SMBUS_BYTE_DATA | \
|
|||
|
I2C_FUNC_SMBUS_WORD_DATA | \
|
|||
|
I2C_FUNC_SMBUS_PROC_CALL | \
|
|||
|
I2C_FUNC_SMBUS_WRITE_BLOCK_DATA | \
|
|||
|
I2C_FUNC_SMBUS_WRITE_BLOCK_DATA_PEC | \
|
|||
|
I2C_FUNC_SMBUS_I2C_BLOCK)
|
|||
|
|
|||
|
/*
|
|||
|
* Data for SMBus Messages
|
|||
|
*/
|
|||
|
#define I2C_SMBUS_BLOCK_MAX 32 /* As specified in SMBus standard */
|
|||
|
#define I2C_SMBUS_I2C_BLOCK_MAX 32 /* Not specified but we use same structure */
|
|||
|
union i2c_smbus_data {
|
|||
|
__u8 byte;
|
|||
|
__u16 word;
|
|||
|
__u8 block[I2C_SMBUS_BLOCK_MAX + 3]; /* block[0] is used for length */
|
|||
|
/* one more for read length in block process call */
|
|||
|
/* and one more for PEC */
|
|||
|
};
|
|||
|
|
|||
|
/* smbus_access read or write markers */
|
|||
|
#define I2C_SMBUS_READ 1
|
|||
|
#define I2C_SMBUS_WRITE 0
|
|||
|
|
|||
|
/* SMBus transaction types (size parameter in the above functions)
|
|||
|
Note: these no longer correspond to the (arbitrary) PIIX4 internal codes! */
|
|||
|
#define I2C_SMBUS_QUICK 0
|
|||
|
#define I2C_SMBUS_BYTE 1
|
|||
|
#define I2C_SMBUS_BYTE_DATA 2
|
|||
|
#define I2C_SMBUS_WORD_DATA 3
|
|||
|
#define I2C_SMBUS_PROC_CALL 4
|
|||
|
#define I2C_SMBUS_BLOCK_DATA 5
|
|||
|
#define I2C_SMBUS_I2C_BLOCK_DATA 6
|
|||
|
#define I2C_SMBUS_BLOCK_PROC_CALL 7 /* SMBus 2.0 */
|
|||
|
#define I2C_SMBUS_BLOCK_DATA_PEC 8 /* SMBus 2.0 */
|
|||
|
#define I2C_SMBUS_PROC_CALL_PEC 9 /* SMBus 2.0 */
|
|||
|
#define I2C_SMBUS_BLOCK_PROC_CALL_PEC 10 /* SMBus 2.0 */
|
|||
|
#define I2C_SMBUS_WORD_DATA_PEC 11 /* SMBus 2.0 */
|
|||
|
|
|||
|
|
|||
|
/* ----- commands for the ioctl like i2c_command call:
|
|||
|
* note that additional calls are defined in the algorithm and hw
|
|||
|
* dependent layers - these can be listed here, or see the
|
|||
|
* corresponding header files.
|
|||
|
*/
|
|||
|
/* -> bit-adapter specific ioctls */
|
|||
|
#define I2C_RETRIES 0x0701 /* number of times a device address */
|
|||
|
/* should be polled when not */
|
|||
|
/* acknowledging */
|
|||
|
#define I2C_TIMEOUT 0x0702 /* set timeout - call with int */
|
|||
|
|
|||
|
|
|||
|
/* this is for i2c-dev.c */
|
|||
|
#define I2C_SLAVE 0x0703 /* Change slave address */
|
|||
|
/* Attn.: Slave address is 7 or 10 bits */
|
|||
|
#define I2C_SLAVE_FORCE 0x0706 /* Change slave address */
|
|||
|
/* Attn.: Slave address is 7 or 10 bits */
|
|||
|
/* This changes the address, even if it */
|
|||
|
/* is already taken! */
|
|||
|
#define I2C_TENBIT 0x0704 /* 0 for 7 bit addrs, != 0 for 10 bit */
|
|||
|
|
|||
|
#define I2C_FUNCS 0x0705 /* Get the adapter functionality */
|
|||
|
#define I2C_RDWR 0x0707 /* Combined R/W transfer (one stop only)*/
|
|||
|
#define I2C_PEC 0x0708 /* != 0 for SMBus PEC */
|
|||
|
#if 0
|
|||
|
#define I2C_ACK_TEST 0x0710 /* See if a slave is at a specific address */
|
|||
|
#endif
|
|||
|
|
|||
|
#define I2C_SMBUS 0x0720 /* SMBus-level access */
|
|||
|
|
|||
|
/* ... algo-bit.c recognizes */
|
|||
|
#define I2C_UDELAY 0x0705 /* set delay in microsecs between each */
|
|||
|
/* written byte (except address) */
|
|||
|
#define I2C_MDELAY 0x0706 /* millisec delay between written bytes */
|
|||
|
|
|||
|
/* ----- I2C-DEV: char device interface stuff ------------------------- */
|
|||
|
|
|||
|
#define I2C_MAJOR 89 /* Device major number */
|
|||
|
|
|||
|
/* These defines are used for probing i2c client addresses */
|
|||
|
/* The length of the option lists */
|
|||
|
#define I2C_CLIENT_MAX_OPTS 48
|
|||
|
|
|||
|
/* Default fill of many variables */
|
|||
|
#define I2C_CLIENT_DEFAULTS {I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
|
|||
|
I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
|
|||
|
I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
|
|||
|
I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
|
|||
|
I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
|
|||
|
I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
|
|||
|
I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
|
|||
|
I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
|
|||
|
I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
|
|||
|
I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
|
|||
|
I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
|
|||
|
I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
|
|||
|
I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
|
|||
|
I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
|
|||
|
I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
|
|||
|
I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END}
|
|||
|
|
|||
|
/* I2C_CLIENT_MODULE_PARM creates a module parameter, and puts it in the
|
|||
|
module header */
|
|||
|
|
|||
|
#define I2C_CLIENT_MODULE_PARM(var,desc) \
|
|||
|
static unsigned short var[I2C_CLIENT_MAX_OPTS] = I2C_CLIENT_DEFAULTS; \
|
|||
|
static unsigned int var##_num; \
|
|||
|
module_param_array(var, short, &var##_num, 0); \
|
|||
|
MODULE_PARM_DESC(var,desc)
|
|||
|
|
|||
|
/* This is the one you want to use in your own modules */
|
|||
|
#define I2C_CLIENT_INSMOD \
|
|||
|
I2C_CLIENT_MODULE_PARM(probe, \
|
|||
|
"List of adapter,address pairs to scan additionally"); \
|
|||
|
I2C_CLIENT_MODULE_PARM(probe_range, \
|
|||
|
"List of adapter,start-addr,end-addr triples to scan " \
|
|||
|
"additionally"); \
|
|||
|
I2C_CLIENT_MODULE_PARM(ignore, \
|
|||
|
"List of adapter,address pairs not to scan"); \
|
|||
|
I2C_CLIENT_MODULE_PARM(ignore_range, \
|
|||
|
"List of adapter,start-addr,end-addr triples not to " \
|
|||
|
"scan"); \
|
|||
|
I2C_CLIENT_MODULE_PARM(force, \
|
|||
|
"List of adapter,address pairs to boldly assume " \
|
|||
|
"to be present"); \
|
|||
|
static struct i2c_client_address_data addr_data = { \
|
|||
|
.normal_i2c = normal_i2c, \
|
|||
|
.normal_i2c_range = normal_i2c_range, \
|
|||
|
.probe = probe, \
|
|||
|
.probe_range = probe_range, \
|
|||
|
.ignore = ignore, \
|
|||
|
.ignore_range = ignore_range, \
|
|||
|
.force = force, \
|
|||
|
}
|
|||
|
|
|||
|
/* Detect whether we are on the isa bus. If this returns true, all i2c
|
|||
|
access will fail! */
|
|||
|
#define i2c_is_isa_client(clientptr) \
|
|||
|
((clientptr)->adapter->algo->id == I2C_ALGO_ISA)
|
|||
|
#define i2c_is_isa_adapter(adapptr) \
|
|||
|
((adapptr)->algo->id == I2C_ALGO_ISA)
|
|||
|
|
|||
|
#endif /* _LINUX_I2C_H */
|