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archived-lcd4linux/lcd4linux_i2c.h

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/* $Id$
* $URL$
*
* user space i2c sturctures and defines, taken from the official kernel i2c
* includes to solve the problem when compiling user space application
* (lcd4linux) with kernel space includes.
* Should be removed when the kernel team decides on how to solve this
* user space/kernel space compilation problem in kernel 2.8 or so.
*
* Copyright (C) 2005 Paul Kamphuis <pk_richman@users.sourceforge.net>
* Copyright (C) 2005 The LCD4Linux Team <lcd4linux-devel@users.sourceforge.net>
*
* taken from kernel includes i2c.h and i2c-dev.h to prevent using kernel includes
* Copyright (C) 1995-2000 Simon G. Vogl
* With some changes from Kyösti Mälkki <kmalkki@cc.hut.fi> and
* Frodo Looijaard <frodol@dds.nl>
*
* This file is part of LCD4Linux.
*
* LCD4Linux 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, or (at your option)
* any later version.
*
* LCD4Linux 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.
*
*/
#ifndef _LCD4LINUX_I2C_H
#define _LCD4LINUX_I2C_H
typedef signed int s32;
typedef signed int __s32;
typedef unsigned char u8;
typedef unsigned short u16;
typedef unsigned char __u8;
typedef unsigned short __u16;
typedef unsigned int u32;
typedef unsigned int __u32;
/* --- 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 *msg, 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.
*/
/*flags for the driver struct: */
#define I2C_DF_NOTIFY 0x01 /* notify on bus (de/a)ttaches */
/*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 0xfffe
#define I2C_CLIENT_ISA_END 0xfffefffe
/* The numbers to use to set I2C bus address */
#define ANY_I2C_BUS 0xffff
#define ANY_I2C_ISA_BUS 9191
/* The length of the option lists */
#define I2C_CLIENT_MAX_OPTS 48
/* ----- 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 */
extern u32 i2c_get_functionality(struct i2c_adapter *adap);
/* Return 1 if adapter supports everything we need, 0 if not. */
extern int i2c_check_functionality(struct i2c_adapter *adap, u32 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 */
/* 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}
/* This is ugly. We need to evaluate I2C_CLIENT_MAX_OPTS before it is
stringified */
#define I2C_CLIENT_MODPARM_AUX1(x) "1-" #x "h"
#define I2C_CLIENT_MODPARM_AUX(x) I2C_CLIENT_MODPARM_AUX1(x)
#define I2C_CLIENT_MODPARM I2C_CLIENT_MODPARM_AUX(I2C_CLIENT_MAX_OPTS)
/* 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_PARM(var,I2C_CLIENT_MODPARM);*/ \
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)
/* Some IOCTL commands are defined in <linux/i2c.h> */
/* Note: 10-bit addresses are NOT supported! */
/* This is the structure as used in the I2C_SMBUS ioctl call */
struct i2c_smbus_ioctl_data {
__u8 read_write;
__u8 command;
__u32 size;
union i2c_smbus_data *data;
};
/* This is the structure as used in the I2C_RDWR ioctl call */
struct i2c_rdwr_ioctl_data {
struct i2c_msg *msgs; /* pointers to i2c_msgs */
__u32 nmsgs; /* number of i2c_msgs */
};
#define I2C_RDRW_IOCTL_MAX_MSGS 42
#include <stdlib.h>
#include <sys/ioctl.h>
static inline __s32 i2c_smbus_access(int file, char read_write, __u8 command, int size, union i2c_smbus_data *data)
{
struct i2c_smbus_ioctl_data args;
args.read_write = read_write;
args.command = command;
args.size = size;
args.data = data;
return ioctl(file, I2C_SMBUS, &args);
}
static inline __s32 i2c_smbus_write_quick(int file, __u8 value)
{
return i2c_smbus_access(file, value, 0, I2C_SMBUS_QUICK, NULL);
}
static inline __s32 i2c_smbus_read_byte(int file)
{
union i2c_smbus_data data;
if (i2c_smbus_access(file, I2C_SMBUS_READ, 0, I2C_SMBUS_BYTE, &data))
return -1;
else
return 0x0FF & data.byte;
}
static inline __s32 i2c_smbus_write_byte(int file, __u8 value)
{
return i2c_smbus_access(file, I2C_SMBUS_WRITE, value, I2C_SMBUS_BYTE, NULL);
}
static inline __s32 i2c_smbus_read_byte_data(int file, __u8 command)
{
union i2c_smbus_data data;
if (i2c_smbus_access(file, I2C_SMBUS_READ, command, I2C_SMBUS_BYTE_DATA, &data))
return -1;
else
return 0x0FF & data.byte;
}
static inline __s32 i2c_smbus_write_byte_data(int file, __u8 command, __u8 value)
{
union i2c_smbus_data data;
data.byte = value;
return i2c_smbus_access(file, I2C_SMBUS_WRITE, command, I2C_SMBUS_BYTE_DATA, &data);
}
static inline __s32 i2c_smbus_read_word_data(int file, __u8 command)
{
union i2c_smbus_data data;
if (i2c_smbus_access(file, I2C_SMBUS_READ, command, I2C_SMBUS_WORD_DATA, &data))
return -1;
else
return 0x0FFFF & data.word;
}
static inline __s32 i2c_smbus_write_word_data(int file, __u8 command, __u16 value)
{
union i2c_smbus_data data;
data.word = value;
return i2c_smbus_access(file, I2C_SMBUS_WRITE, command, I2C_SMBUS_WORD_DATA, &data);
}
static inline __s32 i2c_smbus_process_call(int file, __u8 command, __u16 value)
{
union i2c_smbus_data data;
data.word = value;
if (i2c_smbus_access(file, I2C_SMBUS_WRITE, command, I2C_SMBUS_PROC_CALL, &data))
return -1;
else
return 0x0FFFF & data.word;
}
/* Returns the number of read bytes */
static inline __s32 i2c_smbus_read_block_data(int file, __u8 command, __u8 * values)
{
union i2c_smbus_data data;
int i;
if (i2c_smbus_access(file, I2C_SMBUS_READ, command, I2C_SMBUS_BLOCK_DATA, &data))
return -1;
else {
for (i = 1; i <= data.block[0]; i++)
values[i - 1] = data.block[i];
return data.block[0];
}
}
static inline __s32 i2c_smbus_write_block_data(int file, __u8 command, __u8 length, __u8 * values)
{
union i2c_smbus_data data;
int i;
if (length > 32)
length = 32;
for (i = 1; i <= length; i++)
data.block[i] = values[i - 1];
data.block[0] = length;
return i2c_smbus_access(file, I2C_SMBUS_WRITE, command, I2C_SMBUS_BLOCK_DATA, &data);
}
/* Returns the number of read bytes */
static inline __s32 i2c_smbus_read_i2c_block_data(int file, __u8 command, __u8 * values)
{
union i2c_smbus_data data;
int i;
if (i2c_smbus_access(file, I2C_SMBUS_READ, command, I2C_SMBUS_I2C_BLOCK_DATA, &data))
return -1;
else {
for (i = 1; i <= data.block[0]; i++)
values[i - 1] = data.block[i];
return data.block[0];
}
}
static inline __s32 i2c_smbus_write_i2c_block_data(int file, __u8 command, __u8 length, __u8 * values)
{
union i2c_smbus_data data;
int i;
if (length > 32)
length = 32;
for (i = 1; i <= length; i++)
data.block[i] = values[i - 1];
data.block[0] = length;
return i2c_smbus_access(file, I2C_SMBUS_WRITE, command, I2C_SMBUS_I2C_BLOCK_DATA, &data);
}
/* Returns the number of read bytes */
static inline __s32 i2c_smbus_block_process_call(int file, __u8 command, __u8 length, __u8 * values)
{
union i2c_smbus_data data;
int i;
if (length > 32)
length = 32;
for (i = 1; i <= length; i++)
data.block[i] = values[i - 1];
data.block[0] = length;
if (i2c_smbus_access(file, I2C_SMBUS_WRITE, command, I2C_SMBUS_BLOCK_PROC_CALL, &data))
return -1;
else {
for (i = 1; i <= data.block[0]; i++)
values[i - 1] = data.block[i];
return data.block[0];
}
}
#endif /* _LCD4LINUX_I2C_H */
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