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 } 86