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