LXR qemu/tests/tmp105-test.c

   1/*
   2 * QTest testcase for the TMP105 temperature sensor
   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
  10#include "qemu/osdep.h"
  11#include <glib.h>
  12
  13#include "libqtest.h"
  14#include "libqos/i2c.h"
  15#include "hw/misc/tmp105_regs.h"
  16
  17#define OMAP2_I2C_1_BASE 0x48070000
  18
  19#define TMP105_TEST_ID   "tmp105-test"
  20#define TMP105_TEST_ADDR 0x49
  21
  22static I2CAdapter *i2c;
  23
  24static uint16_t tmp105_get8(I2CAdapter *i2c, uint8_t addr, uint8_t reg)
  25{
  26    uint8_t resp[1];
  27    i2c_send(i2c, addr, &reg, 1);
  28    i2c_recv(i2c, addr, resp, 1);
  29    return resp[0];
  30}
  31
  32static uint16_t tmp105_get16(I2CAdapter *i2c, uint8_t addr, uint8_t reg)
  33{
  34    uint8_t resp[2];
  35    i2c_send(i2c, addr, &reg, 1);
  36    i2c_recv(i2c, addr, resp, 2);
  37    return (resp[0] << 8) | resp[1];
  38}
  39
  40static void tmp105_set8(I2CAdapter *i2c, uint8_t addr, uint8_t reg,
  41                        uint8_t value)
  42{
  43    uint8_t cmd[2];
  44    uint8_t resp[1];
  45
  46    cmd[0] = reg;
  47    cmd[1] = value;
  48    i2c_send(i2c, addr, cmd, 2);
  49    i2c_recv(i2c, addr, resp, 1);
  50    g_assert_cmphex(resp[0], ==, cmd[1]);
  51}
  52
  53static void tmp105_set16(I2CAdapter *i2c, uint8_t addr, uint8_t reg,
  54                         uint16_t value)
  55{
  56    uint8_t cmd[3];
  57    uint8_t resp[2];
  58
  59    cmd[0] = reg;
  60    cmd[1] = value >> 8;
  61    cmd[2] = value & 255;
  62    i2c_send(i2c, addr, cmd, 3);
  63    i2c_recv(i2c, addr, resp, 2);
  64    g_assert_cmphex(resp[0], ==, cmd[1]);
  65    g_assert_cmphex(resp[1], ==, cmd[2]);
  66}
  67
  68static int qmp_tmp105_get_temperature(const char *id)
  69{
  70    QDict *response;
  71    int ret;
  72
  73    response = qmp("{ 'execute': 'qom-get', 'arguments': { 'path': %s, "
  74                   "'property': 'temperature' } }", id);
  75    g_assert(qdict_haskey(response, "return"));
  76    ret = qdict_get_int(response, "return");
  77    QDECREF(response);
  78    return ret;
  79}
  80
  81static void qmp_tmp105_set_temperature(const char *id, int value)
  82{
  83    QDict *response;
  84
  85    response = qmp("{ 'execute': 'qom-set', 'arguments': { 'path': %s, "
  86                   "'property': 'temperature', 'value': %d } }", id, value);
  87    g_assert(qdict_haskey(response, "return"));
  88    QDECREF(response);
  89}
  90
  91#define TMP105_PRECISION (1000/16)
  92static void send_and_receive(void)
  93{
  94    uint16_t value;
  95
  96    value = qmp_tmp105_get_temperature(TMP105_TEST_ID);
  97    g_assert_cmpuint(value, ==, 0);
  98
  99    value = tmp105_get16(i2c, TMP105_TEST_ADDR, TMP105_REG_TEMPERATURE);
 100    g_assert_cmphex(value, ==, 0);
 101
 102    qmp_tmp105_set_temperature(TMP105_TEST_ID, 20000);
 103    value = qmp_tmp105_get_temperature(TMP105_TEST_ID);
 104    g_assert_cmpuint(value, ==, 20000);
 105
 106    value = tmp105_get16(i2c, TMP105_TEST_ADDR, TMP105_REG_TEMPERATURE);
 107    g_assert_cmphex(value, ==, 0x1400);
 108
 109    qmp_tmp105_set_temperature(TMP105_TEST_ID, 20938); /* 20 + 15/16 */
 110    value = qmp_tmp105_get_temperature(TMP105_TEST_ID);
 111    g_assert_cmpuint(value, >=, 20938 - TMP105_PRECISION/2);
 112    g_assert_cmpuint(value, <, 20938 + TMP105_PRECISION/2);
 113
 114    /* Set config */
 115    tmp105_set8(i2c, TMP105_TEST_ADDR, TMP105_REG_CONFIG, 0x60);
 116    value = tmp105_get8(i2c, TMP105_TEST_ADDR, TMP105_REG_CONFIG);
 117    g_assert_cmphex(value, ==, 0x60);
 118
 119    value = tmp105_get16(i2c, TMP105_TEST_ADDR, TMP105_REG_TEMPERATURE);
 120    g_assert_cmphex(value, ==, 0x14f0);
 121
 122    /* Set precision to 9, 10, 11 bits.  */
 123    tmp105_set8(i2c, TMP105_TEST_ADDR, TMP105_REG_CONFIG, 0x00);
 124    value = tmp105_get16(i2c, TMP105_TEST_ADDR, TMP105_REG_TEMPERATURE);
 125    g_assert_cmphex(value, ==, 0x1480);
 126
 127    tmp105_set8(i2c, TMP105_TEST_ADDR, TMP105_REG_CONFIG, 0x20);
 128    value = tmp105_get16(i2c, TMP105_TEST_ADDR, TMP105_REG_TEMPERATURE);
 129    g_assert_cmphex(value, ==, 0x14c0);
 130
 131    tmp105_set8(i2c, TMP105_TEST_ADDR, TMP105_REG_CONFIG, 0x40);
 132    value = tmp105_get16(i2c, TMP105_TEST_ADDR, TMP105_REG_TEMPERATURE);
 133    g_assert_cmphex(value, ==, 0x14e0);
 134
 135    /* stored precision remains the same */
 136    value = qmp_tmp105_get_temperature(TMP105_TEST_ID);
 137    g_assert_cmpuint(value, >=, 20938 - TMP105_PRECISION/2);
 138    g_assert_cmpuint(value, <, 20938 + TMP105_PRECISION/2);
 139
 140    tmp105_set8(i2c, TMP105_TEST_ADDR, TMP105_REG_CONFIG, 0x60);
 141    value = tmp105_get16(i2c, TMP105_TEST_ADDR, TMP105_REG_TEMPERATURE);
 142    g_assert_cmphex(value, ==, 0x14f0);
 143
 144    tmp105_set16(i2c, TMP105_TEST_ADDR, TMP105_REG_T_LOW, 0x1234);
 145    tmp105_set16(i2c, TMP105_TEST_ADDR, TMP105_REG_T_HIGH, 0x4231);
 146}
 147
 148int main(int argc, char **argv)
 149{
 150    QTestState *s = NULL;
 151    int ret;
 152
 153    g_test_init(&argc, &argv, NULL);
 154
 155    s = qtest_start("-machine n800 "
 156                    "-device tmp105,bus=i2c-bus.0,id=" TMP105_TEST_ID
 157                    ",address=0x49");
 158    i2c = omap_i2c_create(OMAP2_I2C_1_BASE);
 159
 160    qtest_add_func("/tmp105/tx-rx", send_and_receive);
 161
 162    ret = g_test_run();
 163
 164    if (s) {
 165        qtest_quit(s);
 166    }
 167    g_free(i2c);
 168
 169    return ret;
 170}
 171