/* * QEMU SMBus API * * Copyright (c) 2007 Arastra, Inc. * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */#include "i2c.h"struct SMBusDevice {    /* The SMBus protocol is implemented on top of I2C.  */    i2c_slave i2c;    /* Callbacks set by the device.  */    void (*quick_cmd)(SMBusDevice *dev, uint8_t read);    void (*send_byte)(SMBusDevice *dev, uint8_t val);    uint8_t (*receive_byte)(SMBusDevice *dev);    /* We can't distinguish between a word write and a block write with       length 1, so pass the whole data block including the length byte       (if present).  The device is responsible figuring out what type of       command  this is.  */    void (*write_data)(SMBusDevice *dev, uint8_t cmd, uint8_t *buf, int len);    /* Likewise we can't distinguish between different reads, or even know       the length of the read until the read is complete, so read data a       byte at a time.  The device is responsible for adding the length       byte on block reads.  */    uint8_t (*read_data)(SMBusDevice *dev, uint8_t cmd, int n);    /* Remaining fields for internal use only.  */    int mode;    int data_len;    uint8_t data_buf[34]; /* command + len + 32 bytes of data.  */    uint8_t command;};/* Create a slave device.  */SMBusDevice *smbus_device_init(i2c_bus *bus, int address, int size);/* Master device commands.  */void smbus_quick_command(i2c_bus *bus, int addr, int read);uint8_t smbus_receive_byte(i2c_bus *bus, int addr);void smbus_send_byte(i2c_bus *bus, int addr, uint8_t data);uint8_t smbus_read_byte(i2c_bus *bus, int addr, uint8_t command);void smbus_write_byte(i2c_bus *bus, int addr, uint8_t command, uint8_t data);uint16_t smbus_read_word(i2c_bus *bus, int addr, uint8_t command);void smbus_write_word(i2c_bus *bus, int addr, uint8_t command, uint16_t data);int smbus_read_block(i2c_bus *bus, int addr, uint8_t command, uint8_t *data);void smbus_write_block(i2c_bus *bus, int addr, uint8_t command, uint8_t *data,                       int len);/* smbus_eeprom.c */void smbus_eeprom_device_init(i2c_bus *bus, uint8_t addr, uint8_t *buf);