@samitouri / QOSamiQemu
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1 /*
2 * QTest testcase for Broadcom Serial Controller (BSC)
3 *
4 * Copyright (c) 2024 Rayhan Faizel <rayhan.faizel@gmail.com>
5 *
6 * SPDX-License-Identifier: MIT
7 *
8 * Permission is hereby granted, free of charge, to any person obtaining a copy
9 * of this software and associated documentation files (the "Software"), to deal
10 * in the Software without restriction, including without limitation the rights
11 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
12 * copies of the Software, and to permit persons to whom the Software is
13 * furnished to do so, subject to the following conditions:
14 *
15 * The above copyright notice and this permission notice shall be included in
16 * all copies or substantial portions of the Software.
17 *
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
19 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
20 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
21 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
22 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
23 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
24 * THE SOFTWARE.
25 */
26
27 #include "qemu/osdep.h"
28 #include "libqtest-single.h"
29
30 #include "hw/i2c/bcm2835_i2c.h"
31 #include "hw/sensor/tmp105_regs.h"
32
33 static const uint32_t bsc_base_addrs[] = {
34 0x3f205000, /* I2C0 */
35 0x3f804000, /* I2C1 */
36 0x3f805000, /* I2C2 */
37 };
38
39 static void bcm2835_i2c_init_transfer(uint32_t base_addr, bool read)
40 {
41 /* read flag is bit 0 so we can write it directly */
42 int interrupt = read ? BCM2835_I2C_C_INTR : BCM2835_I2C_C_INTT;
43
44 writel(base_addr + BCM2835_I2C_C,
45 BCM2835_I2C_C_I2CEN | BCM2835_I2C_C_INTD |
46 BCM2835_I2C_C_ST | BCM2835_I2C_C_CLEAR | interrupt | read);
47 }
48
49 static void test_i2c_read_write(gconstpointer data)
50 {
51 uint32_t i2cdata;
52 intptr_t index = (intptr_t) data;
53 uint32_t base_addr = bsc_base_addrs[index];
54
55 /* Write to TMP105 register */
56 writel(base_addr + BCM2835_I2C_A, 0x50);
57 writel(base_addr + BCM2835_I2C_DLEN, 3);
58
59 bcm2835_i2c_init_transfer(base_addr, 0);
60
61 writel(base_addr + BCM2835_I2C_FIFO, TMP105_REG_T_HIGH);
62 writel(base_addr + BCM2835_I2C_FIFO, 0xde);
63 writel(base_addr + BCM2835_I2C_FIFO, 0xad);
64
65 /* Clear flags */
66 writel(base_addr + BCM2835_I2C_S, BCM2835_I2C_S_DONE | BCM2835_I2C_S_ERR |
67 BCM2835_I2C_S_CLKT);
68
69 /* Read from TMP105 register */
70 writel(base_addr + BCM2835_I2C_A, 0x50);
71 writel(base_addr + BCM2835_I2C_DLEN, 1);
72
73 bcm2835_i2c_init_transfer(base_addr, 0);
74
75 writel(base_addr + BCM2835_I2C_FIFO, TMP105_REG_T_HIGH);
76
77 writel(base_addr + BCM2835_I2C_DLEN, 2);
78 bcm2835_i2c_init_transfer(base_addr, 1);
79
80 i2cdata = readl(base_addr + BCM2835_I2C_FIFO);
81 g_assert_cmpint(i2cdata, ==, 0xde);
82
83 i2cdata = readl(base_addr + BCM2835_I2C_FIFO);
84 g_assert_cmpint(i2cdata, ==, 0xa0);
85
86 /* Clear flags */
87 writel(base_addr + BCM2835_I2C_S, BCM2835_I2C_S_DONE | BCM2835_I2C_S_ERR |
88 BCM2835_I2C_S_CLKT);
89
90 }
91
92 int main(int argc, char **argv)
93 {
94 int ret;
95 int i;
96
97 g_test_init(&argc, &argv, NULL);
98
99 for (i = 0; i < 3; i++) {
100 g_autofree char *test_name =
101 g_strdup_printf("/bcm2835/bcm2835-i2c%d/read_write", i);
102 qtest_add_data_func(test_name, (void *)(intptr_t) i,
103 test_i2c_read_write);
104 }
105
106 /* Run I2C tests with TMP105 slaves on all three buses */
107 qtest_start("-M raspi3b "
108 "-device tmp105,address=0x50,bus=i2c-bus.0 "
109 "-device tmp105,address=0x50,bus=i2c-bus.1 "
110 "-device tmp105,address=0x50,bus=i2c-bus.2");
111 ret = g_test_run();
112 qtest_end();
113
114 return ret;
115 }