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