| 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 |