aboutsummaryrefslogtreecommitdiff
path: root/tests/tmp105-test.c
blob: 66c7a0147f6903cc79ca83cc9214a8ac1a9e1945 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
/*
 * 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 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, &reg, 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, &reg, 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(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;
}