use system wide i2c-dev.h instead of local copy
This commit is contained in:
Axel Schwenke
parent
7c6c0d3b3c
commit
59bbb85f00
1 changed files with 0 additions and 361 deletions
361
i2c-dev.h
361
i2c-dev.h
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/*
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i2c-dev.h - i2c-bus driver, char device interface
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Copyright (C) 1995-97 Simon G. Vogl
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Copyright (C) 1998-99 Frodo Looijaard <frodol@dds.nl>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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/* $Id: i2c-dev.h,v 1.4 2003/11/27 23:08:06 tat Exp $ */
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#ifndef LIB_I2CDEV_H
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#define LIB_I2CDEV_H
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#include <linux/types.h>
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#include <sys/ioctl.h>
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/* -- i2c.h -- */
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/*
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* I2C Message - used for pure i2c transaction, also from /dev interface
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*/
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struct i2c_msg {
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__u16 addr; /* slave address */
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unsigned short flags;
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#define I2C_M_TEN 0x10 /* we have a ten bit chip address */
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#define I2C_M_RD 0x01
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#define I2C_M_NOSTART 0x4000
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#define I2C_M_REV_DIR_ADDR 0x2000
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#define I2C_M_IGNORE_NAK 0x1000
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#define I2C_M_NO_RD_ACK 0x0800
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short len; /* msg length */
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char *buf; /* pointer to msg data */
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int err;
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short done;
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};
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/* To determine what functionality is present */
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#define I2C_FUNC_I2C 0x00000001
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#define I2C_FUNC_10BIT_ADDR 0x00000002
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#define I2C_FUNC_PROTOCOL_MANGLING 0x00000004 /* I2C_M_{REV_DIR_ADDR,NOSTART,..} */
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#define I2C_FUNC_SMBUS_HWPEC_CALC 0x00000008 /* SMBus 2.0 */
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#define I2C_FUNC_SMBUS_READ_WORD_DATA_PEC 0x00000800 /* SMBus 2.0 */
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#define I2C_FUNC_SMBUS_WRITE_WORD_DATA_PEC 0x00001000 /* SMBus 2.0 */
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#define I2C_FUNC_SMBUS_PROC_CALL_PEC 0x00002000 /* SMBus 2.0 */
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#define I2C_FUNC_SMBUS_BLOCK_PROC_CALL_PEC 0x00004000 /* SMBus 2.0 */
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#define I2C_FUNC_SMBUS_BLOCK_PROC_CALL 0x00008000 /* SMBus 2.0 */
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#define I2C_FUNC_SMBUS_QUICK 0x00010000
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#define I2C_FUNC_SMBUS_READ_BYTE 0x00020000
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#define I2C_FUNC_SMBUS_WRITE_BYTE 0x00040000
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#define I2C_FUNC_SMBUS_READ_BYTE_DATA 0x00080000
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#define I2C_FUNC_SMBUS_WRITE_BYTE_DATA 0x00100000
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#define I2C_FUNC_SMBUS_READ_WORD_DATA 0x00200000
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#define I2C_FUNC_SMBUS_WRITE_WORD_DATA 0x00400000
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#define I2C_FUNC_SMBUS_PROC_CALL 0x00800000
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#define I2C_FUNC_SMBUS_READ_BLOCK_DATA 0x01000000
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#define I2C_FUNC_SMBUS_WRITE_BLOCK_DATA 0x02000000
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#define I2C_FUNC_SMBUS_READ_I2C_BLOCK 0x04000000 /* I2C-like block xfer */
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#define I2C_FUNC_SMBUS_WRITE_I2C_BLOCK 0x08000000 /* w/ 1-byte reg. addr. */
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#define I2C_FUNC_SMBUS_READ_I2C_BLOCK_2 0x10000000 /* I2C-like block xfer */
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#define I2C_FUNC_SMBUS_WRITE_I2C_BLOCK_2 0x20000000 /* w/ 2-byte reg. addr. */
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#define I2C_FUNC_SMBUS_READ_BLOCK_DATA_PEC 0x40000000 /* SMBus 2.0 */
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#define I2C_FUNC_SMBUS_WRITE_BLOCK_DATA_PEC 0x80000000 /* SMBus 2.0 */
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#define I2C_FUNC_SMBUS_BYTE I2C_FUNC_SMBUS_READ_BYTE | \
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I2C_FUNC_SMBUS_WRITE_BYTE
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#define I2C_FUNC_SMBUS_BYTE_DATA I2C_FUNC_SMBUS_READ_BYTE_DATA | \
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I2C_FUNC_SMBUS_WRITE_BYTE_DATA
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#define I2C_FUNC_SMBUS_WORD_DATA I2C_FUNC_SMBUS_READ_WORD_DATA | \
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I2C_FUNC_SMBUS_WRITE_WORD_DATA
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#define I2C_FUNC_SMBUS_BLOCK_DATA I2C_FUNC_SMBUS_READ_BLOCK_DATA | \
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I2C_FUNC_SMBUS_WRITE_BLOCK_DATA
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#define I2C_FUNC_SMBUS_I2C_BLOCK I2C_FUNC_SMBUS_READ_I2C_BLOCK | \
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I2C_FUNC_SMBUS_WRITE_I2C_BLOCK
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#define I2C_FUNC_SMBUS_I2C_BLOCK_2 I2C_FUNC_SMBUS_READ_I2C_BLOCK_2 | \
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I2C_FUNC_SMBUS_WRITE_I2C_BLOCK_2
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#define I2C_FUNC_SMBUS_BLOCK_DATA_PEC I2C_FUNC_SMBUS_READ_BLOCK_DATA_PEC | \
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I2C_FUNC_SMBUS_WRITE_BLOCK_DATA_PEC
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#define I2C_FUNC_SMBUS_WORD_DATA_PEC I2C_FUNC_SMBUS_READ_WORD_DATA_PEC | \
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I2C_FUNC_SMBUS_WRITE_WORD_DATA_PEC
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#define I2C_FUNC_SMBUS_READ_BYTE_PEC I2C_FUNC_SMBUS_READ_BYTE_DATA
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#define I2C_FUNC_SMBUS_WRITE_BYTE_PEC I2C_FUNC_SMBUS_WRITE_BYTE_DATA
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#define I2C_FUNC_SMBUS_READ_BYTE_DATA_PEC I2C_FUNC_SMBUS_READ_WORD_DATA
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#define I2C_FUNC_SMBUS_WRITE_BYTE_DATA_PEC I2C_FUNC_SMBUS_WRITE_WORD_DATA
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#define I2C_FUNC_SMBUS_BYTE_PEC I2C_FUNC_SMBUS_BYTE_DATA
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#define I2C_FUNC_SMBUS_BYTE_DATA_PEC I2C_FUNC_SMBUS_WORD_DATA
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#define I2C_FUNC_SMBUS_EMUL I2C_FUNC_SMBUS_QUICK | \
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I2C_FUNC_SMBUS_BYTE | \
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I2C_FUNC_SMBUS_BYTE_DATA | \
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I2C_FUNC_SMBUS_WORD_DATA | \
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I2C_FUNC_SMBUS_PROC_CALL | \
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I2C_FUNC_SMBUS_WRITE_BLOCK_DATA | \
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I2C_FUNC_SMBUS_WRITE_BLOCK_DATA_PEC | \
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I2C_FUNC_SMBUS_I2C_BLOCK
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/*
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* Data for SMBus Messages
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*/
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#define I2C_SMBUS_BLOCK_MAX 32 /* As specified in SMBus standard */
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#define I2C_SMBUS_I2C_BLOCK_MAX 32 /* Not specified but we use same structure */
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union i2c_smbus_data {
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__u8 byte;
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__u16 word;
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__u8 block[I2C_SMBUS_BLOCK_MAX + 3]; /* block[0] is used for length */
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/* one more for read length in block process call */
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/* and one more for PEC */
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};
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/* smbus_access read or write markers */
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#define I2C_SMBUS_READ 1
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#define I2C_SMBUS_WRITE 0
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/* SMBus transaction types (size parameter in the above functions)
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Note: these no longer correspond to the (arbitrary) PIIX4 internal codes! */
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#define I2C_SMBUS_QUICK 0
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#define I2C_SMBUS_BYTE 1
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#define I2C_SMBUS_BYTE_DATA 2
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#define I2C_SMBUS_WORD_DATA 3
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#define I2C_SMBUS_PROC_CALL 4
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#define I2C_SMBUS_BLOCK_DATA 5
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#define I2C_SMBUS_I2C_BLOCK_DATA 6
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#define I2C_SMBUS_BLOCK_PROC_CALL 7 /* SMBus 2.0 */
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#define I2C_SMBUS_BLOCK_DATA_PEC 8 /* SMBus 2.0 */
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#define I2C_SMBUS_PROC_CALL_PEC 9 /* SMBus 2.0 */
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#define I2C_SMBUS_BLOCK_PROC_CALL_PEC 10 /* SMBus 2.0 */
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#define I2C_SMBUS_WORD_DATA_PEC 11 /* SMBus 2.0 */
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/* ----- commands for the ioctl like i2c_command call:
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* note that additional calls are defined in the algorithm and hw
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* dependent layers - these can be listed here, or see the
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* corresponding header files.
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*/
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/* -> bit-adapter specific ioctls */
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#define I2C_RETRIES 0x0701 /* number of times a device address */
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/* should be polled when not */
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/* acknowledging */
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#define I2C_TIMEOUT 0x0702 /* set timeout - call with int */
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/* this is for i2c-dev.c */
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#define I2C_SLAVE 0x0703 /* Change slave address */
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/* Attn.: Slave address is 7 or 10 bits */
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#define I2C_SLAVE_FORCE 0x0706 /* Change slave address */
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/* Attn.: Slave address is 7 or 10 bits */
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/* This changes the address, even if it */
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/* is already taken! */
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#define I2C_TENBIT 0x0704 /* 0 for 7 bit addrs, != 0 for 10 bit */
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#define I2C_FUNCS 0x0705 /* Get the adapter functionality */
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#define I2C_RDWR 0x0707 /* Combined R/W transfer (one stop only)*/
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#define I2C_PEC 0x0708 /* != 0 for SMBus PEC */
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#if 0
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#define I2C_ACK_TEST 0x0710 /* See if a slave is at a specific address */
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#endif
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#define I2C_SMBUS 0x0720 /* SMBus-level access */
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/* -- i2c.h -- */
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/* Note: 10-bit addresses are NOT supported! */
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/* This is the structure as used in the I2C_SMBUS ioctl call */
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struct i2c_smbus_ioctl_data {
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char read_write;
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__u8 command;
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int size;
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union i2c_smbus_data *data;
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};
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/* This is the structure as used in the I2C_RDWR ioctl call */
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struct i2c_rdwr_ioctl_data {
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struct i2c_msg *msgs; /* pointers to i2c_msgs */
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int nmsgs; /* number of i2c_msgs */
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};
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static inline __s32 i2c_smbus_access(int file, char read_write, __u8 command,
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int size, union i2c_smbus_data *data)
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{
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struct i2c_smbus_ioctl_data args;
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args.read_write = read_write;
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args.command = command;
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args.size = size;
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args.data = data;
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return ioctl(file,I2C_SMBUS,&args);
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}
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static inline __s32 i2c_smbus_write_quick(int file, __u8 value)
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{
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return i2c_smbus_access(file,value,0,I2C_SMBUS_QUICK,NULL);
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}
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static inline __s32 i2c_smbus_read_byte(int file)
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{
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union i2c_smbus_data data;
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if (i2c_smbus_access(file,I2C_SMBUS_READ,0,I2C_SMBUS_BYTE,&data))
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return -1;
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else
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return 0x0FF & data.byte;
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}
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static inline __s32 i2c_smbus_write_byte(int file, __u8 value)
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{
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return i2c_smbus_access(file,I2C_SMBUS_WRITE,value,
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I2C_SMBUS_BYTE,NULL);
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}
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static inline __s32 i2c_smbus_read_byte_data(int file, __u8 command)
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{
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union i2c_smbus_data data;
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if (i2c_smbus_access(file,I2C_SMBUS_READ,command,
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I2C_SMBUS_BYTE_DATA,&data))
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return -1;
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else
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return 0x0FF & data.byte;
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}
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static inline __s32 i2c_smbus_write_byte_data(int file, __u8 command,
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__u8 value)
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{
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union i2c_smbus_data data;
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data.byte = value;
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return i2c_smbus_access(file,I2C_SMBUS_WRITE,command,
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I2C_SMBUS_BYTE_DATA, &data);
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}
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static inline __s32 i2c_smbus_read_word_data(int file, __u8 command)
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{
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union i2c_smbus_data data;
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if (i2c_smbus_access(file,I2C_SMBUS_READ,command,
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I2C_SMBUS_WORD_DATA,&data))
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return -1;
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else
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return 0x0FFFF & data.word;
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}
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static inline __s32 i2c_smbus_write_word_data(int file, __u8 command,
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__u16 value)
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{
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union i2c_smbus_data data;
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data.word = value;
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return i2c_smbus_access(file,I2C_SMBUS_WRITE,command,
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I2C_SMBUS_WORD_DATA, &data);
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}
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static inline __s32 i2c_smbus_process_call(int file, __u8 command, __u16 value)
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{
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union i2c_smbus_data data;
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data.word = value;
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if (i2c_smbus_access(file,I2C_SMBUS_WRITE,command,
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I2C_SMBUS_PROC_CALL,&data))
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return -1;
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else
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return 0x0FFFF & data.word;
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}
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/* Returns the number of read bytes */
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static inline __s32 i2c_smbus_read_block_data(int file, __u8 command,
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__u8 *values)
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{
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union i2c_smbus_data data;
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int i;
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if (i2c_smbus_access(file,I2C_SMBUS_READ,command,
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I2C_SMBUS_BLOCK_DATA,&data))
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return -1;
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else {
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for (i = 1; i <= data.block[0]; i++)
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values[i-1] = data.block[i];
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return data.block[0];
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}
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}
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static inline __s32 i2c_smbus_write_block_data(int file, __u8 command,
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__u8 length, __u8 *values)
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{
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union i2c_smbus_data data;
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int i;
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if (length > 32)
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length = 32;
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for (i = 1; i <= length; i++)
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data.block[i] = values[i-1];
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data.block[0] = length;
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return i2c_smbus_access(file,I2C_SMBUS_WRITE,command,
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I2C_SMBUS_BLOCK_DATA, &data);
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}
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/* Returns the number of read bytes */
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static inline __s32 i2c_smbus_read_i2c_block_data(int file, __u8 command,
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__u8 *values)
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{
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union i2c_smbus_data data;
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int i;
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if (i2c_smbus_access(file,I2C_SMBUS_READ,command,
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I2C_SMBUS_I2C_BLOCK_DATA,&data))
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return -1;
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else {
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for (i = 1; i <= data.block[0]; i++)
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values[i-1] = data.block[i];
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return data.block[0];
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}
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}
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static inline __s32 i2c_smbus_write_i2c_block_data(int file, __u8 command,
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__u8 length, __u8 *values)
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{
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union i2c_smbus_data data;
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int i;
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||||||
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 /* LIB_I2CDEV_H */
|
|
||||||
Loading…
Reference in a new issue