LXR qemu/include/hw/i2c/smbus

   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.  */
  31int smbus_quick_command(I2CBus *bus, uint8_t addr, int read);
  32int smbus_receive_byte(I2CBus *bus, uint8_t addr);
  33int smbus_send_byte(I2CBus *bus, uint8_t addr, uint8_t data);
  34int smbus_read_byte(I2CBus *bus, uint8_t addr, uint8_t command);
  35int smbus_write_byte(I2CBus *bus, uint8_t addr, uint8_t command, uint8_t data);
  36int smbus_read_word(I2CBus *bus, uint8_t addr, uint8_t command);
  37int 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 */
  45int 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 */
  52int smbus_write_block(I2CBus *bus, uint8_t addr, uint8_t command, uint8_t *data,
  53                      int len, bool send_len);
  54
  55#endif
  56