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 OMAP2_I2C_1_BASE 0x48070000
  18
  19 #define TMP105_TEST_ID   "tmp105-test"
  20 #define TMP105_TEST_ADDR 0x49
  21
  22 static I2CAdapter *i2c;
  23
  24 static 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
  32 static 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
  40 static 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
  53 static 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
  68 static 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
  81 static 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)
  92 static 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
 148 int 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(s, OMAP2_I2C_1_BASE);
 159
 160     qtest_add_func("/tmp105/tx-rx", send_and_receive);
 161
 162     ret = g_test_run();
 163
 164     qtest_quit(s);
 165     g_free(i2c);
 166
 167     return ret;
 168 }