RTEMS: cpukit/include/linux/i2c.h Source File

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i2c.h
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1
9/*
10 * Copyright (c) 2014 embedded brains GmbH. All rights reserved.
11 *
12 * embedded brains GmbH
13 * Dornierstr. 4
14 * 82178 Puchheim
15 * Germany
16 * <rtems@embedded-brains.de>
17 *
18 * The license and distribution terms for this file may be
19 * found in the file LICENSE in this distribution or at
20 * http://www.rtems.org/license/LICENSE.
21 */
22
23#ifndef _UAPI_LINUX_I2C_H
24#define _UAPI_LINUX_I2C_H
25
26#include <stdint.h>
27
59#define I2C_M_TEN 0x0010
60
66#define I2C_M_RD 0x0001
67
77#define I2C_M_STOP 0x8000
78
87#define I2C_M_NOSTART 0x4000
88
97#define I2C_M_REV_DIR_ADDR 0x2000
98
107#define I2C_M_IGNORE_NAK 0x1000
108
118#define I2C_M_NO_RD_ACK 0x0800
119
131#define I2C_M_RECV_LEN 0x0400
132
138 struct i2c_msg {
145 uint16_t addr;
146
160 uint16_t flags;
161
165 uint16_t len;
166
170 uint8_t *buf;
171};
172
179#define I2C_FUNC_I2C 0x00000001
180#define I2C_FUNC_10BIT_ADDR 0x00000002
181#define I2C_FUNC_PROTOCOL_MANGLING 0x00000004
182#define I2C_FUNC_SMBUS_PEC 0x00000008
183#define I2C_FUNC_NOSTART 0x00000010
184#define I2C_FUNC_SMBUS_BLOCK_PROC_CALL 0x00008000
185#define I2C_FUNC_SMBUS_QUICK 0x00010000
186#define I2C_FUNC_SMBUS_READ_BYTE 0x00020000
187#define I2C_FUNC_SMBUS_WRITE_BYTE 0x00040000
188#define I2C_FUNC_SMBUS_READ_BYTE_DATA 0x00080000
189#define I2C_FUNC_SMBUS_WRITE_BYTE_DATA 0x00100000
190#define I2C_FUNC_SMBUS_READ_WORD_DATA 0x00200000
191#define I2C_FUNC_SMBUS_WRITE_WORD_DATA 0x00400000
192#define I2C_FUNC_SMBUS_PROC_CALL 0x00800000
193#define I2C_FUNC_SMBUS_READ_BLOCK_DATA 0x01000000
194#define I2C_FUNC_SMBUS_WRITE_BLOCK_DATA 0x02000000
195#define I2C_FUNC_SMBUS_READ_I2C_BLOCK 0x04000000
196#define I2C_FUNC_SMBUS_WRITE_I2C_BLOCK 0x08000000
197
198#define I2C_FUNC_SMBUS_BYTE \
199 (I2C_FUNC_SMBUS_READ_BYTE | I2C_FUNC_SMBUS_WRITE_BYTE)
200
201#define I2C_FUNC_SMBUS_BYTE_DATA \
202 (I2C_FUNC_SMBUS_READ_BYTE_DATA | I2C_FUNC_SMBUS_WRITE_BYTE_DATA)
203
204#define I2C_FUNC_SMBUS_WORD_DATA \
205 (I2C_FUNC_SMBUS_READ_WORD_DATA | I2C_FUNC_SMBUS_WRITE_WORD_DATA)
206
207#define I2C_FUNC_SMBUS_BLOCK_DATA \
208 (I2C_FUNC_SMBUS_READ_BLOCK_DATA | I2C_FUNC_SMBUS_WRITE_BLOCK_DATA)
209
210#define I2C_FUNC_SMBUS_I2C_BLOCK \
211 (I2C_FUNC_SMBUS_READ_I2C_BLOCK | I2C_FUNC_SMBUS_WRITE_I2C_BLOCK)
212
213#define I2C_FUNC_SMBUS_EMUL \
214 (I2C_FUNC_SMBUS_QUICK | I2C_FUNC_SMBUS_BYTE | I2C_FUNC_SMBUS_BYTE_DATA \
215 | I2C_FUNC_SMBUS_WORD_DATA | I2C_FUNC_SMBUS_PROC_CALL \
216 | I2C_FUNC_SMBUS_WRITE_BLOCK_DATA | I2C_FUNC_SMBUS_I2C_BLOCK \
217 | I2C_FUNC_SMBUS_PEC)
218
224#define I2C_SMBUS_BLOCK_MAX 32
225
229 union i2c_smbus_data {
230 uint8_t byte;
231 uint16_t word;
232 uint8_t block[I2C_SMBUS_BLOCK_MAX + 2];
233};
234
241#define I2C_SMBUS_READ 1
242
243#define I2C_SMBUS_WRITE 0
244
253#define I2C_SMBUS_QUICK 0
254
255#define I2C_SMBUS_BYTE 1
256
257#define I2C_SMBUS_BYTE_DATA 2
258
259#define I2C_SMBUS_WORD_DATA 3
260
261#define I2C_SMBUS_PROC_CALL 4
262
263#define I2C_SMBUS_BLOCK_DATA 5
264
265#define I2C_SMBUS_I2C_BLOCK_BROKEN 6
266
267#define I2C_SMBUS_BLOCK_PROC_CALL 7
268
269#define I2C_SMBUS_I2C_BLOCK_DATA 8
270
275#endif /* _UAPI_LINUX_I2C_H */
I2C_SMBUS_BLOCK_MAX
#define I2C_SMBUS_BLOCK_MAX
Maximum SMBus data block count.
Definition: i2c.h:224
i2c_msg
I2C transfer message.
Definition: i2c.h:138
i2c_msg::len
uint16_t len
The message data length in bytes.
Definition: i2c.h:165
i2c_msg::flags
uint16_t flags
The message flags.
Definition: i2c.h:160
i2c_msg::buf
uint8_t * buf
Pointer to the message data.
Definition: i2c.h:170
i2c_msg::addr
uint16_t addr
The slave address.
Definition: i2c.h:145
i2c_smbus_data
SMBus data.
Definition: i2c.h:229