Jan Dabros | b0800d3 | 2020-05-06 16:01:27 +0200 | [diff] [blame] | 1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
Jan Dabros | a67cc5f | 2020-04-20 14:34:16 +0200 | [diff] [blame] | 2 | |
Jan Dabros | a67cc5f | 2020-04-20 14:34:16 +0200 | [diff] [blame] | 3 | #include <device/i2c_simple.h> |
Julius Werner | 2174481 | 2020-05-04 17:44:04 -0700 | [diff] [blame] | 4 | #include <limits.h> |
| 5 | #include <tests/test.h> |
Jan Dabros | a67cc5f | 2020-04-20 14:34:16 +0200 | [diff] [blame] | 6 | |
| 7 | /* Simulate two i2c devices, both on bus 0, each with three uint8_t regs |
| 8 | implemented. */ |
| 9 | typedef struct { |
| 10 | uint8_t reg; |
| 11 | uint8_t data; |
| 12 | } i2c_ex_regs_t; |
| 13 | |
| 14 | typedef struct { |
| 15 | unsigned int bus; |
| 16 | uint8_t slave; |
| 17 | i2c_ex_regs_t regs[3]; |
| 18 | } i2c_ex_devs_t; |
| 19 | |
| 20 | i2c_ex_devs_t i2c_ex_devs[] = { |
Jakub Czapiga | c08b6a7 | 2022-01-10 13:36:47 +0000 | [diff] [blame] | 21 | { |
| 22 | .bus = 0, |
| 23 | .slave = 0xA, |
| 24 | .regs = { |
| 25 | {.reg = 0x0, .data = 0xB}, |
| 26 | {.reg = 0x1, .data = 0x6}, |
| 27 | {.reg = 0x2, .data = 0xF}, |
| 28 | } |
| 29 | }, |
| 30 | { |
| 31 | .bus = 0, |
| 32 | .slave = 0x3, |
| 33 | .regs = { |
| 34 | {.reg = 0x0, .data = 0xDE}, |
| 35 | {.reg = 0x1, .data = 0xAD}, |
| 36 | {.reg = 0x2, .data = 0xBE}, |
| 37 | } |
| 38 | }, |
Jan Dabros | a67cc5f | 2020-04-20 14:34:16 +0200 | [diff] [blame] | 39 | }; |
| 40 | |
Jakub Czapiga | c08b6a7 | 2022-01-10 13:36:47 +0000 | [diff] [blame] | 41 | int platform_i2c_transfer(unsigned int bus, struct i2c_msg *segments, int count) |
Jan Dabros | a67cc5f | 2020-04-20 14:34:16 +0200 | [diff] [blame] | 42 | { |
| 43 | int i; |
| 44 | int reg; |
| 45 | struct i2c_msg *tmp = segments; |
| 46 | i2c_ex_devs_t *i2c_dev = NULL; |
| 47 | |
| 48 | check_expected(count); |
| 49 | |
| 50 | for (i = 0; i < count; i++, segments++) { |
| 51 | check_expected_ptr(segments->buf); |
| 52 | check_expected(segments->flags); |
| 53 | } |
| 54 | |
| 55 | reg = tmp->buf[0]; |
| 56 | |
| 57 | /* Find object for requested device */ |
Julius Werner | 1e14de8 | 2020-06-10 15:35:08 -0700 | [diff] [blame] | 58 | for (i = 0; i < ARRAY_SIZE(i2c_ex_devs); i++) |
Jan Dabros | a67cc5f | 2020-04-20 14:34:16 +0200 | [diff] [blame] | 59 | if (i2c_ex_devs[i].slave == tmp->slave) { |
| 60 | i2c_dev = &i2c_ex_devs[i]; |
| 61 | break; |
| 62 | } |
| 63 | |
| 64 | if (i2c_dev == NULL) |
| 65 | return -1; |
| 66 | |
| 67 | /* Write commands */ |
| 68 | if (tmp->len > 1) { |
| 69 | i2c_dev->regs[reg].data = tmp->buf[1]; |
| 70 | }; |
| 71 | |
| 72 | /* Read commands */ |
| 73 | for (i = 0; i < count; i++, tmp++) |
| 74 | if (tmp->flags & I2C_M_RD) { |
| 75 | *(tmp->buf) = i2c_dev->regs[reg].data; |
| 76 | }; |
Julius Werner | 1e14de8 | 2020-06-10 15:35:08 -0700 | [diff] [blame] | 77 | |
| 78 | return 0; |
Jan Dabros | a67cc5f | 2020-04-20 14:34:16 +0200 | [diff] [blame] | 79 | } |
| 80 | |
| 81 | static void mock_expect_params_platform_i2c_transfer(void) |
| 82 | { |
Jakub Czapiga | c08b6a7 | 2022-01-10 13:36:47 +0000 | [diff] [blame] | 83 | unsigned long int expected_flags[] = {0, I2C_M_RD, I2C_M_TEN, I2C_M_RECV_LEN, |
| 84 | I2C_M_NOSTART}; |
Jan Dabros | a67cc5f | 2020-04-20 14:34:16 +0200 | [diff] [blame] | 85 | |
| 86 | /* Flags should always be only within supported range */ |
Jakub Czapiga | c08b6a7 | 2022-01-10 13:36:47 +0000 | [diff] [blame] | 87 | expect_in_set_count(platform_i2c_transfer, segments->flags, expected_flags, -1); |
Jan Dabros | a67cc5f | 2020-04-20 14:34:16 +0200 | [diff] [blame] | 88 | |
Jakub Czapiga | c08b6a7 | 2022-01-10 13:36:47 +0000 | [diff] [blame] | 89 | expect_not_value_count(platform_i2c_transfer, segments->buf, NULL, -1); |
Jan Dabros | a67cc5f | 2020-04-20 14:34:16 +0200 | [diff] [blame] | 90 | |
Jakub Czapiga | c08b6a7 | 2022-01-10 13:36:47 +0000 | [diff] [blame] | 91 | expect_in_range_count(platform_i2c_transfer, count, 1, INT_MAX, -1); |
Jan Dabros | a67cc5f | 2020-04-20 14:34:16 +0200 | [diff] [blame] | 92 | } |
| 93 | |
Jakub Czapiga | c08b6a7 | 2022-01-10 13:36:47 +0000 | [diff] [blame] | 94 | #define MASK 0x3 |
| 95 | #define SHIFT 0x1 |
Jan Dabros | a67cc5f | 2020-04-20 14:34:16 +0200 | [diff] [blame] | 96 | |
| 97 | static void i2c_read_field_test(void **state) |
| 98 | { |
Jan Dabros | a67cc5f | 2020-04-20 14:34:16 +0200 | [diff] [blame] | 99 | int i, j; |
| 100 | uint8_t buf; |
| 101 | |
| 102 | mock_expect_params_platform_i2c_transfer(); |
| 103 | |
| 104 | /* Read particular bits in all registers in all devices, then compare |
| 105 | with expected value. */ |
| 106 | for (i = 0; i < ARRAY_SIZE(i2c_ex_devs); i++) |
| 107 | for (j = 0; j < ARRAY_SIZE(i2c_ex_devs[0].regs); j++) { |
Jakub Czapiga | c08b6a7 | 2022-01-10 13:36:47 +0000 | [diff] [blame] | 108 | i2c_read_field(i2c_ex_devs[i].bus, i2c_ex_devs[i].slave, |
| 109 | i2c_ex_devs[i].regs[j].reg, &buf, MASK, SHIFT); |
| 110 | assert_int_equal( |
| 111 | (i2c_ex_devs[i].regs[j].data & (MASK << SHIFT)) >> SHIFT, buf); |
Jan Dabros | a67cc5f | 2020-04-20 14:34:16 +0200 | [diff] [blame] | 112 | }; |
| 113 | |
| 114 | /* Read whole registers */ |
| 115 | for (i = 0; i < ARRAY_SIZE(i2c_ex_devs); i++) |
| 116 | for (j = 0; j < ARRAY_SIZE(i2c_ex_devs[0].regs); j++) { |
Jakub Czapiga | c08b6a7 | 2022-01-10 13:36:47 +0000 | [diff] [blame] | 117 | i2c_read_field(i2c_ex_devs[i].bus, i2c_ex_devs[i].slave, |
| 118 | i2c_ex_devs[i].regs[j].reg, &buf, 0xFF, 0); |
Jan Dabros | a67cc5f | 2020-04-20 14:34:16 +0200 | [diff] [blame] | 119 | assert_int_equal(i2c_ex_devs[i].regs[j].data, buf); |
| 120 | }; |
| 121 | } |
| 122 | |
| 123 | static void i2c_write_field_test(void **state) |
| 124 | { |
Jan Dabros | a67cc5f | 2020-04-20 14:34:16 +0200 | [diff] [blame] | 125 | int i, j; |
| 126 | uint8_t buf, tmp; |
| 127 | |
| 128 | mock_expect_params_platform_i2c_transfer(); |
| 129 | |
| 130 | /* Clear particular bits in all registers in all devices, then compare |
| 131 | with expected value. */ |
| 132 | for (i = 0; i < ARRAY_SIZE(i2c_ex_devs); i++) |
| 133 | for (j = 0; j < ARRAY_SIZE(i2c_ex_devs[0].regs); j++) { |
| 134 | buf = 0x0; |
| 135 | tmp = i2c_ex_devs[i].regs[j].data; |
Jakub Czapiga | c08b6a7 | 2022-01-10 13:36:47 +0000 | [diff] [blame] | 136 | i2c_write_field(i2c_ex_devs[i].bus, i2c_ex_devs[i].slave, |
| 137 | i2c_ex_devs[i].regs[j].reg, buf, MASK, SHIFT); |
Jan Dabros | a67cc5f | 2020-04-20 14:34:16 +0200 | [diff] [blame] | 138 | assert_int_equal(i2c_ex_devs[i].regs[j].data, |
Jakub Czapiga | c08b6a7 | 2022-01-10 13:36:47 +0000 | [diff] [blame] | 139 | (tmp & ~(MASK << SHIFT)) | (buf << SHIFT)); |
Jan Dabros | a67cc5f | 2020-04-20 14:34:16 +0200 | [diff] [blame] | 140 | }; |
| 141 | |
| 142 | /* Set all bits in all registers, this time verify using |
| 143 | i2c_read_field() accessor. */ |
| 144 | for (i = 0; i < ARRAY_SIZE(i2c_ex_devs); i++) |
| 145 | for (j = 0; j < ARRAY_SIZE(i2c_ex_devs[0].regs); j++) { |
Jakub Czapiga | c08b6a7 | 2022-01-10 13:36:47 +0000 | [diff] [blame] | 146 | i2c_write_field(i2c_ex_devs[i].bus, i2c_ex_devs[i].slave, |
| 147 | i2c_ex_devs[i].regs[j].reg, 0xFF, 0xFF, 0); |
| 148 | i2c_read_field(i2c_ex_devs[i].bus, i2c_ex_devs[i].slave, |
| 149 | i2c_ex_devs[i].regs[j].reg, &buf, 0xFF, 0); |
Jan Dabros | a67cc5f | 2020-04-20 14:34:16 +0200 | [diff] [blame] | 150 | assert_int_equal(buf, 0xFF); |
| 151 | }; |
| 152 | } |
| 153 | |
| 154 | int main(void) |
| 155 | { |
Jakub Czapiga | c08b6a7 | 2022-01-10 13:36:47 +0000 | [diff] [blame] | 156 | const struct CMUnitTest tests[] = {cmocka_unit_test(i2c_read_field_test), |
| 157 | cmocka_unit_test(i2c_write_field_test)}; |
Jan Dabros | a67cc5f | 2020-04-20 14:34:16 +0200 | [diff] [blame] | 158 | |
Jakub Czapiga | 7c6081e | 2021-08-25 16:27:35 +0200 | [diff] [blame] | 159 | return cb_run_group_tests(tests, NULL, NULL); |
Jan Dabros | a67cc5f | 2020-04-20 14:34:16 +0200 | [diff] [blame] | 160 | } |