/* * QTest testcase for the TMP105 temperature sensor * * Copyright (c) 2012 Andreas Färber * * This work is licensed under the terms of the GNU GPL, version 2 or later. * See the COPYING file in the top-level directory. */ #include <glib.h> #include "libqtest.h" #include "libqos/i2c.h" #include "hw/misc/tmp105_regs.h" #define OMAP2_I2C_1_BASE 0x48070000 #define TMP105_TEST_ID "tmp105-test" #define TMP105_TEST_ADDR 0x49 static I2CAdapter *i2c; static uint16_t tmp105_get8(I2CAdapter *i2c, uint8_t addr, uint8_t reg) { uint8_t resp[1]; i2c_send(i2c, addr, ®, 1); i2c_recv(i2c, addr, resp, 1); return resp[0]; } static uint16_t tmp105_get16(I2CAdapter *i2c, uint8_t addr, uint8_t reg) { uint8_t resp[2]; i2c_send(i2c, addr, ®, 1); i2c_recv(i2c, addr, resp, 2); return (resp[0] << 8) | resp[1]; } static void tmp105_set8(I2CAdapter *i2c, uint8_t addr, uint8_t reg, uint8_t value) { uint8_t cmd[2]; uint8_t resp[1]; cmd[0] = reg; cmd[1] = value; i2c_send(i2c, addr, cmd, 2); i2c_recv(i2c, addr, resp, 1); g_assert_cmphex(resp[0], ==, cmd[1]); } static void tmp105_set16(I2CAdapter *i2c, uint8_t addr, uint8_t reg, uint16_t value) { uint8_t cmd[3]; uint8_t resp[2]; cmd[0] = reg; cmd[1] = value >> 8; cmd[2] = value & 255; i2c_send(i2c, addr, cmd, 3); i2c_recv(i2c, addr, resp, 2); g_assert_cmphex(resp[0], ==, cmd[1]); g_assert_cmphex(resp[1], ==, cmd[2]); } static int qmp_tmp105_get_temperature(const char *id) { QDict *response; int ret; response = qmp("{ 'execute': 'qom-get', 'arguments': { 'path': %s, " "'property': 'temperature' } }", id); g_assert(qdict_haskey(response, "return")); ret = qdict_get_int(response, "return"); QDECREF(response); return ret; } static void qmp_tmp105_set_temperature(const char *id, int value) { QDict *response; response = qmp("{ 'execute': 'qom-set', 'arguments': { 'path': %s, " "'property': 'temperature', 'value': %d } }", id, value); g_assert(qdict_haskey(response, "return")); QDECREF(response); } #define TMP105_PRECISION (1000/16) static void send_and_receive(void) { uint16_t value; value = qmp_tmp105_get_temperature(TMP105_TEST_ID); g_assert_cmpuint(value, ==, 0); value = tmp105_get16(i2c, TMP105_TEST_ADDR, TMP105_REG_TEMPERATURE); g_assert_cmphex(value, ==, 0); qmp_tmp105_set_temperature(TMP105_TEST_ID, 20000); value = qmp_tmp105_get_temperature(TMP105_TEST_ID); g_assert_cmpuint(value, ==, 20000); value = tmp105_get16(i2c, TMP105_TEST_ADDR, TMP105_REG_TEMPERATURE); g_assert_cmphex(value, ==, 0x1400); qmp_tmp105_set_temperature(TMP105_TEST_ID, 20938); /* 20 + 15/16 */ value = qmp_tmp105_get_temperature(TMP105_TEST_ID); g_assert_cmpuint(value, >=, 20938 - TMP105_PRECISION/2); g_assert_cmpuint(value, <, 20938 + TMP105_PRECISION/2); /* Set config */ tmp105_set8(i2c, TMP105_TEST_ADDR, TMP105_REG_CONFIG, 0x60); value = tmp105_get8(i2c, TMP105_TEST_ADDR, TMP105_REG_CONFIG); g_assert_cmphex(value, ==, 0x60); value = tmp105_get16(i2c, TMP105_TEST_ADDR, TMP105_REG_TEMPERATURE); g_assert_cmphex(value, ==, 0x14f0); /* Set precision to 9, 10, 11 bits. */ tmp105_set8(i2c, TMP105_TEST_ADDR, TMP105_REG_CONFIG, 0x00); value = tmp105_get16(i2c, TMP105_TEST_ADDR, TMP105_REG_TEMPERATURE); g_assert_cmphex(value, ==, 0x1480); tmp105_set8(i2c, TMP105_TEST_ADDR, TMP105_REG_CONFIG, 0x20); value = tmp105_get16(i2c, TMP105_TEST_ADDR, TMP105_REG_TEMPERATURE); g_assert_cmphex(value, ==, 0x14c0); tmp105_set8(i2c, TMP105_TEST_ADDR, TMP105_REG_CONFIG, 0x40); value = tmp105_get16(i2c, TMP105_TEST_ADDR, TMP105_REG_TEMPERATURE); g_assert_cmphex(value, ==, 0x14e0); /* stored precision remains the same */ value = qmp_tmp105_get_temperature(TMP105_TEST_ID); g_assert_cmpuint(value, >=, 20938 - TMP105_PRECISION/2); g_assert_cmpuint(value, <, 20938 + TMP105_PRECISION/2); tmp105_set8(i2c, TMP105_TEST_ADDR, TMP105_REG_CONFIG, 0x60); value = tmp105_get16(i2c, TMP105_TEST_ADDR, TMP105_REG_TEMPERATURE); g_assert_cmphex(value, ==, 0x14f0); tmp105_set16(i2c, TMP105_TEST_ADDR, TMP105_REG_T_LOW, 0x1234); tmp105_set16(i2c, TMP105_TEST_ADDR, TMP105_REG_T_HIGH, 0x4231); } int main(int argc, char **argv) { QTestState *s = NULL; int ret; g_test_init(&argc, &argv, NULL); s = qtest_start("-machine n800 " "-device tmp105,bus=i2c-bus.0,id=" TMP105_TEST_ID ",address=0x49"); i2c = omap_i2c_create(OMAP2_I2C_1_BASE); qtest_add_func("/tmp105/tx-rx", send_and_receive); ret = g_test_run(); if (s) { qtest_quit(s); } g_free(i2c); return ret; }