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
  20 static I2CAdapter *i2c;
  21
  22 static 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
  30 static 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
  38 static 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
  51 static 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
  66 static 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
  79 static 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)
  90 static 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
 146 int 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 }