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
  13 void i2c_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 i2c_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     i2c_send(i2cdev, &reg, 1);
  27     i2c_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     i2c_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 }