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/*
* 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 "qemu/osdep.h"
#include "libqtest.h"
#include "libqos/i2c.h"
#include "qapi/qmp/qdict.h"
#include "hw/misc/tmp105_regs.h"
#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");
qobject_unref(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"));
qobject_unref(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(s, OMAP2_I2C_1_BASE);
qtest_add_func("/tmp105/tx-rx", send_and_receive);
ret = g_test_run();
qtest_quit(s);
g_free(i2c);
return ret;
}
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