4 * Copyright (c) 2012 Andreas Färber
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.
9 #include "qemu/osdep.h"
10 #include "libqos/i2c.h"
13 void i2c_send(QI2CDevice *i2cdev, const uint8_t *buf, uint16_t len)
15 i2cdev->bus->send(i2cdev->bus, i2cdev->addr, buf, len);
18 void i2c_recv(QI2CDevice *i2cdev, uint8_t *buf, uint16_t len)
20 i2cdev->bus->recv(i2cdev->bus, i2cdev->addr, buf, len);
23 void i2c_read_block(QI2CDevice *i2cdev, uint8_t reg,
24 uint8_t *buf, uint16_t len)
26 i2c_send(i2cdev, ®, 1);
27 i2c_recv(i2cdev, buf, len);
30 void i2c_write_block(QI2CDevice *i2cdev, uint8_t reg,
31 const uint8_t *buf, uint16_t len)
33 uint8_t *cmd = g_malloc(len + 1);
35 memcpy(&cmd[1], buf, len);
36 i2c_send(i2cdev, cmd, len + 1);
40 uint8_t i2c_get8(QI2CDevice *i2cdev, uint8_t reg)
43 i2c_read_block(i2cdev, reg, resp, sizeof(resp));
47 uint16_t i2c_get16(QI2CDevice *i2cdev, uint8_t reg)
50 i2c_read_block(i2cdev, reg, resp, sizeof(resp));
51 return (resp[0] << 8) | resp[1];
54 void i2c_set8(QI2CDevice *i2cdev, uint8_t reg, uint8_t value)
56 i2c_write_block(i2cdev, reg, &value, 1);
59 void i2c_set16(QI2CDevice *i2cdev, uint8_t reg, uint16_t value)
64 data[1] = value & 255;
65 i2c_write_block(i2cdev, reg, data, sizeof(data));
68 void *i2c_device_create(void *i2c_bus, QGuestAllocator *alloc, void *addr)
70 QI2CDevice *i2cdev = g_new0(QI2CDevice, 1);
72 i2cdev->bus = i2c_bus;
74 i2cdev->addr = ((QI2CAddress *)addr)->addr;
79 void add_qi2c_address(QOSGraphEdgeOptions *opts, QI2CAddress *addr)
84 opts->size_arg = sizeof(QI2CAddress);