smbus_master.h (2399B)
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