| 1 | /* |
| 2 | * QTest I2C driver |
| 3 | * |
| 4 | * Copyright (c) 2012 Andreas Färber |
| 5 | * |
| 6 | * This work is licensed under the terms of the GNU GPL, version 2 or later. |
| 7 | * See the COPYING file in the top-level directory. |
| 8 | */ |
| 9 | #include "qemu/osdep.h" |
| 10 | #include "i2c.h" |
| 11 | #include "../libqtest.h" |
| 12 | |
| 13 | void qi2c_send(QI2CDevice *i2cdev, const uint8_t *buf, uint16_t len) |
| 14 | { |
| 15 | i2cdev->bus->send(i2cdev->bus, i2cdev->addr, buf, len); |
| 16 | } |
| 17 | |
| 18 | void qi2c_recv(QI2CDevice *i2cdev, uint8_t *buf, uint16_t len) |
| 19 | { |
| 20 | i2cdev->bus->recv(i2cdev->bus, i2cdev->addr, buf, len); |
| 21 | } |
| 22 | |
| 23 | void i2c_read_block(QI2CDevice *i2cdev, uint8_t reg, |
| 24 | uint8_t *buf, uint16_t len) |
| 25 | { |
| 26 | qi2c_send(i2cdev, ®, 1); |
| 27 | qi2c_recv(i2cdev, buf, len); |
| 28 | } |
| 29 | |
| 30 | void i2c_write_block(QI2CDevice *i2cdev, uint8_t reg, |
| 31 | const uint8_t *buf, uint16_t len) |
| 32 | { |
| 33 | uint8_t *cmd = g_malloc(len + 1); |
| 34 | cmd[0] = reg; |
| 35 | memcpy(&cmd[1], buf, len); |
| 36 | qi2c_send(i2cdev, cmd, len + 1); |
| 37 | g_free(cmd); |
| 38 | } |
| 39 | |
| 40 | uint8_t i2c_get8(QI2CDevice *i2cdev, uint8_t reg) |
| 41 | { |
| 42 | uint8_t resp[1]; |
| 43 | i2c_read_block(i2cdev, reg, resp, sizeof(resp)); |
| 44 | return resp[0]; |
| 45 | } |
| 46 | |
| 47 | uint16_t i2c_get16(QI2CDevice *i2cdev, uint8_t reg) |
| 48 | { |
| 49 | uint8_t resp[2]; |
| 50 | i2c_read_block(i2cdev, reg, resp, sizeof(resp)); |
| 51 | return (resp[0] << 8) | resp[1]; |
| 52 | } |
| 53 | |
| 54 | void i2c_set8(QI2CDevice *i2cdev, uint8_t reg, uint8_t value) |
| 55 | { |
| 56 | i2c_write_block(i2cdev, reg, &value, 1); |
| 57 | } |
| 58 | |
| 59 | void i2c_set16(QI2CDevice *i2cdev, uint8_t reg, uint16_t value) |
| 60 | { |
| 61 | uint8_t data[2]; |
| 62 | |
| 63 | data[0] = value >> 8; |
| 64 | data[1] = value & 255; |
| 65 | i2c_write_block(i2cdev, reg, data, sizeof(data)); |
| 66 | } |
| 67 | |
| 68 | void *i2c_device_create(void *i2c_bus, QGuestAllocator *alloc, void *addr) |
| 69 | { |
| 70 | QI2CDevice *i2cdev = g_new0(QI2CDevice, 1); |
| 71 | |
| 72 | i2cdev->bus = i2c_bus; |
| 73 | if (addr) { |
| 74 | i2cdev->addr = ((QI2CAddress *)addr)->addr; |
| 75 | } |
| 76 | return &i2cdev->obj; |
| 77 | } |
| 78 | |
| 79 | void add_qi2c_address(QOSGraphEdgeOptions *opts, QI2CAddress *addr) |
| 80 | { |
| 81 | g_assert(addr); |
| 82 | |
| 83 | opts->arg = addr; |
| 84 | opts->size_arg = sizeof(QI2CAddress); |
| 85 | } |