include/hw/i2c/smbus_master.h

   1 /*
   2  * QEMU SMBus host (master) API
   3  *
   4  * Copyright (c) 2007 Arastra, Inc.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a copy
   7  * of this software and associated documentation files (the "Software"), to deal
   8  * in the Software without restriction, including without limitation the rights
   9  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  10  * copies of the Software, and to permit persons to whom the Software is
  11  * furnished to do so, subject to the following conditions:
  12  *
  13  * The above copyright notice and this permission notice shall be included in
  14  * all copies or substantial portions of the Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  19  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  20  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  21  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  22  * THE SOFTWARE.
  23  */
  24
  25 #ifndef HW_SMBUS_MASTER_H
  26 #define HW_SMBUS_MASTER_H
  27
  28 #include "hw/i2c/i2c.h"
  29
  30 /* Master device commands.  */
  31 int smbus_quick_command(I2CBus *bus, uint8_t addr, int read);
  32 int smbus_receive_byte(I2CBus *bus, uint8_t addr);
  33 int smbus_send_byte(I2CBus *bus, uint8_t addr, uint8_t data);
  34 int smbus_read_byte(I2CBus *bus, uint8_t addr, uint8_t command);
  35 int smbus_write_byte(I2CBus *bus, uint8_t addr, uint8_t command, uint8_t data);
  36 int smbus_read_word(I2CBus *bus, uint8_t addr, uint8_t command);
  37 int smbus_write_word(I2CBus *bus, uint8_t addr, uint8_t command, uint16_t data);
  38
  39 /*
  40  * Do a block transfer from an I2C device.  If recv_len is set, then the
  41  * first received byte is a length field and is used to know how much data
  42  * to receive.  Otherwise receive "len" bytes.  If send_cmd is set, send
  43  * the command byte first before receiving the data.
  44  */
  45 int smbus_read_block(I2CBus *bus, uint8_t addr, uint8_t command, uint8_t *data,
  46                      int len, bool recv_len, bool send_cmd);
  47
  48 /*
  49  * Do a block transfer to an I2C device.  If send_len is set, send the
  50  * "len" value before the data.
  51  */
  52 int smbus_write_block(I2CBus *bus, uint8_t addr, uint8_t command, uint8_t *data,
  53                       int len, bool send_len);
  54
  55 #endif