LXR qemu/tests/libqos/i2c.c

   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 "libqos/i2c.h"
  11#include "libqtest.h"
  12
  13void i2c_send(QI2CDevice *i2cdev, const uint8_t *buf, uint16_t len)
  14{
  15    i2cdev->bus->send(i2cdev->bus, i2cdev->addr, buf, len);
  16}
  17
  18void i2c_recv(QI2CDevice *i2cdev, uint8_t *buf, uint16_t len)
  19{
  20    i2cdev->bus->recv(i2cdev->bus, i2cdev->addr, buf, len);
  21}
  22
  23void i2c_read_block(QI2CDevice *i2cdev, uint8_t reg,
  24                    uint8_t *buf, uint16_t len)
  25{
  26    i2c_send(i2cdev, &reg, 1);
  27    i2c_recv(i2cdev, buf, len);
  28}
  29
  30void 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    i2c_send(i2cdev, cmd, len + 1);
  37    g_free(cmd);
  38}
  39
  40uint8_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
  47uint16_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
  54void i2c_set8(QI2CDevice *i2cdev, uint8_t reg, uint8_t value)
  55{
  56    i2c_write_block(i2cdev, reg, &value, 1);
  57}
  58
  59void 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
  68void *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
  79void 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