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
  21 static I2CAdapter *i2c;
  22
  23 static 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
  31 static 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
  39 static 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
  52 static 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
  67 static 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
  80 static 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)
  91 static 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
 147 int 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 }