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Tom Rini83d290c2018-05-06 17:58:06 -04001// SPDX-License-Identifier: GPL-2.0+
Simon Glassecc2ed52014-12-10 08:55:55 -07002/*
3 * Copyright (C) 2013 Google, Inc
4 *
Simon Glassecc2ed52014-12-10 08:55:55 -07005 * Note: Test coverage does not include 10-bit addressing
6 */
7
8#include <common.h>
9#include <dm.h>
10#include <fdtdec.h>
11#include <i2c.h>
Joe Hershbergere721b882015-05-20 14:27:27 -050012#include <asm/state.h>
13#include <asm/test.h>
Simon Glassecc2ed52014-12-10 08:55:55 -070014#include <dm/device-internal.h>
15#include <dm/test.h>
16#include <dm/uclass-internal.h>
Simon Glassecc2ed52014-12-10 08:55:55 -070017#include <dm/util.h>
Joe Hershbergere721b882015-05-20 14:27:27 -050018#include <test/ut.h>
Simon Glassecc2ed52014-12-10 08:55:55 -070019
20static const int busnum;
21static const int chip = 0x2c;
22
23/* Test that we can find buses and chips */
Joe Hershbergere721b882015-05-20 14:27:27 -050024static int dm_test_i2c_find(struct unit_test_state *uts)
Simon Glassecc2ed52014-12-10 08:55:55 -070025{
26 struct udevice *bus, *dev;
27 const int no_chip = 0x10;
28
29 ut_asserteq(-ENODEV, uclass_find_device_by_seq(UCLASS_I2C, busnum,
30 false, &bus));
31
32 /*
Simon Glass91195482016-07-05 17:10:10 -060033 * The post_bind() method will bind devices to chip selects. Check
34 * this then remove the emulation and the slave device.
Simon Glassecc2ed52014-12-10 08:55:55 -070035 */
36 ut_assertok(uclass_get_device_by_seq(UCLASS_I2C, busnum, &bus));
Simon Glassf9a4c2d2015-01-12 18:02:07 -070037 ut_assertok(dm_i2c_probe(bus, chip, 0, &dev));
38 ut_asserteq(-ENODEV, dm_i2c_probe(bus, no_chip, 0, &dev));
Simon Glassecc2ed52014-12-10 08:55:55 -070039 ut_asserteq(-ENODEV, uclass_get_device_by_seq(UCLASS_I2C, 1, &bus));
40
41 return 0;
42}
43DM_TEST(dm_test_i2c_find, DM_TESTF_SCAN_PDATA | DM_TESTF_SCAN_FDT);
44
Joe Hershbergere721b882015-05-20 14:27:27 -050045static int dm_test_i2c_read_write(struct unit_test_state *uts)
Simon Glassecc2ed52014-12-10 08:55:55 -070046{
47 struct udevice *bus, *dev;
48 uint8_t buf[5];
49
50 ut_assertok(uclass_get_device_by_seq(UCLASS_I2C, busnum, &bus));
Simon Glass25ab4b02015-01-25 08:26:55 -070051 ut_assertok(i2c_get_chip(bus, chip, 1, &dev));
Simon Glassf9a4c2d2015-01-12 18:02:07 -070052 ut_assertok(dm_i2c_read(dev, 0, buf, 5));
Simon Glassecc2ed52014-12-10 08:55:55 -070053 ut_assertok(memcmp(buf, "\0\0\0\0\0", sizeof(buf)));
Simon Glassf9a4c2d2015-01-12 18:02:07 -070054 ut_assertok(dm_i2c_write(dev, 2, (uint8_t *)"AB", 2));
55 ut_assertok(dm_i2c_read(dev, 0, buf, 5));
Simon Glassecc2ed52014-12-10 08:55:55 -070056 ut_assertok(memcmp(buf, "\0\0AB\0", sizeof(buf)));
57
58 return 0;
59}
60DM_TEST(dm_test_i2c_read_write, DM_TESTF_SCAN_PDATA | DM_TESTF_SCAN_FDT);
61
Joe Hershbergere721b882015-05-20 14:27:27 -050062static int dm_test_i2c_speed(struct unit_test_state *uts)
Simon Glassecc2ed52014-12-10 08:55:55 -070063{
64 struct udevice *bus, *dev;
65 uint8_t buf[5];
66
67 ut_assertok(uclass_get_device_by_seq(UCLASS_I2C, busnum, &bus));
Simon Glass182bf922015-04-20 12:37:15 -060068
69 /* Use test mode so we create the required errors for invalid speeds */
70 sandbox_i2c_set_test_mode(bus, true);
Simon Glass25ab4b02015-01-25 08:26:55 -070071 ut_assertok(i2c_get_chip(bus, chip, 1, &dev));
Simon Glassca88b9b2015-02-05 21:41:32 -070072 ut_assertok(dm_i2c_set_bus_speed(bus, 100000));
Simon Glassf9a4c2d2015-01-12 18:02:07 -070073 ut_assertok(dm_i2c_read(dev, 0, buf, 5));
Simon Glassca88b9b2015-02-05 21:41:32 -070074 ut_assertok(dm_i2c_set_bus_speed(bus, 400000));
75 ut_asserteq(400000, dm_i2c_get_bus_speed(bus));
Simon Glassf9a4c2d2015-01-12 18:02:07 -070076 ut_assertok(dm_i2c_read(dev, 0, buf, 5));
77 ut_asserteq(-EINVAL, dm_i2c_write(dev, 0, buf, 5));
Simon Glass182bf922015-04-20 12:37:15 -060078 sandbox_i2c_set_test_mode(bus, false);
Simon Glassecc2ed52014-12-10 08:55:55 -070079
80 return 0;
81}
82DM_TEST(dm_test_i2c_speed, DM_TESTF_SCAN_PDATA | DM_TESTF_SCAN_FDT);
83
Joe Hershbergere721b882015-05-20 14:27:27 -050084static int dm_test_i2c_offset_len(struct unit_test_state *uts)
Simon Glassecc2ed52014-12-10 08:55:55 -070085{
86 struct udevice *bus, *dev;
87 uint8_t buf[5];
88
89 ut_assertok(uclass_get_device_by_seq(UCLASS_I2C, busnum, &bus));
Simon Glass25ab4b02015-01-25 08:26:55 -070090 ut_assertok(i2c_get_chip(bus, chip, 1, &dev));
Simon Glassecc2ed52014-12-10 08:55:55 -070091 ut_assertok(i2c_set_chip_offset_len(dev, 1));
Simon Glassf9a4c2d2015-01-12 18:02:07 -070092 ut_assertok(dm_i2c_read(dev, 0, buf, 5));
Simon Glassecc2ed52014-12-10 08:55:55 -070093
94 /* This is not supported by the uclass */
95 ut_asserteq(-EINVAL, i2c_set_chip_offset_len(dev, 5));
96
97 return 0;
98}
99DM_TEST(dm_test_i2c_offset_len, DM_TESTF_SCAN_PDATA | DM_TESTF_SCAN_FDT);
100
Joe Hershbergere721b882015-05-20 14:27:27 -0500101static int dm_test_i2c_probe_empty(struct unit_test_state *uts)
Simon Glassecc2ed52014-12-10 08:55:55 -0700102{
103 struct udevice *bus, *dev;
104
105 ut_assertok(uclass_get_device_by_seq(UCLASS_I2C, busnum, &bus));
Simon Glass182bf922015-04-20 12:37:15 -0600106
107 /* Use test mode so that this chip address will always probe */
108 sandbox_i2c_set_test_mode(bus, true);
Simon Glassf9a4c2d2015-01-12 18:02:07 -0700109 ut_assertok(dm_i2c_probe(bus, SANDBOX_I2C_TEST_ADDR, 0, &dev));
Simon Glass182bf922015-04-20 12:37:15 -0600110 sandbox_i2c_set_test_mode(bus, false);
Simon Glassecc2ed52014-12-10 08:55:55 -0700111
112 return 0;
113}
114DM_TEST(dm_test_i2c_probe_empty, DM_TESTF_SCAN_PDATA | DM_TESTF_SCAN_FDT);
115
Joe Hershbergere721b882015-05-20 14:27:27 -0500116static int dm_test_i2c_bytewise(struct unit_test_state *uts)
Simon Glassecc2ed52014-12-10 08:55:55 -0700117{
118 struct udevice *bus, *dev;
119 struct udevice *eeprom;
120 uint8_t buf[5];
121
122 ut_assertok(uclass_get_device_by_seq(UCLASS_I2C, busnum, &bus));
Simon Glass25ab4b02015-01-25 08:26:55 -0700123 ut_assertok(i2c_get_chip(bus, chip, 1, &dev));
Simon Glassf9a4c2d2015-01-12 18:02:07 -0700124 ut_assertok(dm_i2c_read(dev, 0, buf, 5));
Simon Glassecc2ed52014-12-10 08:55:55 -0700125 ut_assertok(memcmp(buf, "\0\0\0\0\0", sizeof(buf)));
126
127 /* Tell the EEPROM to only read/write one register at a time */
128 ut_assertok(uclass_first_device(UCLASS_I2C_EMUL, &eeprom));
129 ut_assertnonnull(eeprom);
130 sandbox_i2c_eeprom_set_test_mode(eeprom, SIE_TEST_MODE_SINGLE_BYTE);
131
132 /* Now we only get the first byte - the rest will be 0xff */
Simon Glassf9a4c2d2015-01-12 18:02:07 -0700133 ut_assertok(dm_i2c_read(dev, 0, buf, 5));
Simon Glassecc2ed52014-12-10 08:55:55 -0700134 ut_assertok(memcmp(buf, "\0\xff\xff\xff\xff", sizeof(buf)));
135
136 /* If we do a separate transaction for each byte, it works */
137 ut_assertok(i2c_set_chip_flags(dev, DM_I2C_CHIP_RD_ADDRESS));
Simon Glassf9a4c2d2015-01-12 18:02:07 -0700138 ut_assertok(dm_i2c_read(dev, 0, buf, 5));
Simon Glassecc2ed52014-12-10 08:55:55 -0700139 ut_assertok(memcmp(buf, "\0\0\0\0\0", sizeof(buf)));
140
141 /* This will only write A */
142 ut_assertok(i2c_set_chip_flags(dev, 0));
Simon Glassf9a4c2d2015-01-12 18:02:07 -0700143 ut_assertok(dm_i2c_write(dev, 2, (uint8_t *)"AB", 2));
144 ut_assertok(dm_i2c_read(dev, 0, buf, 5));
Simon Glassecc2ed52014-12-10 08:55:55 -0700145 ut_assertok(memcmp(buf, "\0\xff\xff\xff\xff", sizeof(buf)));
146
147 /* Check that the B was ignored */
148 ut_assertok(i2c_set_chip_flags(dev, DM_I2C_CHIP_RD_ADDRESS));
Simon Glassf9a4c2d2015-01-12 18:02:07 -0700149 ut_assertok(dm_i2c_read(dev, 0, buf, 5));
Simon Glassecc2ed52014-12-10 08:55:55 -0700150 ut_assertok(memcmp(buf, "\0\0A\0\0\0", sizeof(buf)));
151
152 /* Now write it again with the new flags, it should work */
153 ut_assertok(i2c_set_chip_flags(dev, DM_I2C_CHIP_WR_ADDRESS));
Simon Glassf9a4c2d2015-01-12 18:02:07 -0700154 ut_assertok(dm_i2c_write(dev, 2, (uint8_t *)"AB", 2));
155 ut_assertok(dm_i2c_read(dev, 0, buf, 5));
Simon Glassecc2ed52014-12-10 08:55:55 -0700156 ut_assertok(memcmp(buf, "\0\xff\xff\xff\xff", sizeof(buf)));
157
158 ut_assertok(i2c_set_chip_flags(dev, DM_I2C_CHIP_WR_ADDRESS |
159 DM_I2C_CHIP_RD_ADDRESS));
Simon Glassf9a4c2d2015-01-12 18:02:07 -0700160 ut_assertok(dm_i2c_read(dev, 0, buf, 5));
Simon Glassecc2ed52014-12-10 08:55:55 -0700161 ut_assertok(memcmp(buf, "\0\0AB\0\0", sizeof(buf)));
162
163 /* Restore defaults */
164 sandbox_i2c_eeprom_set_test_mode(eeprom, SIE_TEST_MODE_NONE);
165 ut_assertok(i2c_set_chip_flags(dev, 0));
166
167 return 0;
168}
169DM_TEST(dm_test_i2c_bytewise, DM_TESTF_SCAN_PDATA | DM_TESTF_SCAN_FDT);
170
Joe Hershbergere721b882015-05-20 14:27:27 -0500171static int dm_test_i2c_offset(struct unit_test_state *uts)
Simon Glassecc2ed52014-12-10 08:55:55 -0700172{
173 struct udevice *eeprom;
174 struct udevice *dev;
175 uint8_t buf[5];
176
Simon Glass25ab4b02015-01-25 08:26:55 -0700177 ut_assertok(i2c_get_chip_for_busnum(busnum, chip, 1, &dev));
Simon Glassecc2ed52014-12-10 08:55:55 -0700178
179 /* Do a transfer so we can find the emulator */
Simon Glassf9a4c2d2015-01-12 18:02:07 -0700180 ut_assertok(dm_i2c_read(dev, 0, buf, 5));
Simon Glassecc2ed52014-12-10 08:55:55 -0700181 ut_assertok(uclass_first_device(UCLASS_I2C_EMUL, &eeprom));
182
183 /* Offset length 0 */
184 sandbox_i2c_eeprom_set_offset_len(eeprom, 0);
185 ut_assertok(i2c_set_chip_offset_len(dev, 0));
Simon Glassf9a4c2d2015-01-12 18:02:07 -0700186 ut_assertok(dm_i2c_write(dev, 10 /* ignored */, (uint8_t *)"AB", 2));
187 ut_assertok(dm_i2c_read(dev, 0, buf, 5));
Simon Glassecc2ed52014-12-10 08:55:55 -0700188 ut_assertok(memcmp(buf, "AB\0\0\0\0", sizeof(buf)));
189
190 /* Offset length 1 */
191 sandbox_i2c_eeprom_set_offset_len(eeprom, 1);
192 ut_assertok(i2c_set_chip_offset_len(dev, 1));
Simon Glassf9a4c2d2015-01-12 18:02:07 -0700193 ut_assertok(dm_i2c_write(dev, 2, (uint8_t *)"AB", 2));
194 ut_assertok(dm_i2c_read(dev, 0, buf, 5));
Simon Glassecc2ed52014-12-10 08:55:55 -0700195 ut_assertok(memcmp(buf, "ABAB\0", sizeof(buf)));
196
197 /* Offset length 2 */
198 sandbox_i2c_eeprom_set_offset_len(eeprom, 2);
199 ut_assertok(i2c_set_chip_offset_len(dev, 2));
Simon Glassf9a4c2d2015-01-12 18:02:07 -0700200 ut_assertok(dm_i2c_write(dev, 0x210, (uint8_t *)"AB", 2));
201 ut_assertok(dm_i2c_read(dev, 0x210, buf, 5));
Simon Glassecc2ed52014-12-10 08:55:55 -0700202 ut_assertok(memcmp(buf, "AB\0\0\0", sizeof(buf)));
203
204 /* Offset length 3 */
205 sandbox_i2c_eeprom_set_offset_len(eeprom, 2);
206 ut_assertok(i2c_set_chip_offset_len(dev, 2));
Simon Glassf9a4c2d2015-01-12 18:02:07 -0700207 ut_assertok(dm_i2c_write(dev, 0x410, (uint8_t *)"AB", 2));
208 ut_assertok(dm_i2c_read(dev, 0x410, buf, 5));
Simon Glassecc2ed52014-12-10 08:55:55 -0700209 ut_assertok(memcmp(buf, "AB\0\0\0", sizeof(buf)));
210
211 /* Offset length 4 */
212 sandbox_i2c_eeprom_set_offset_len(eeprom, 2);
213 ut_assertok(i2c_set_chip_offset_len(dev, 2));
Simon Glassf9a4c2d2015-01-12 18:02:07 -0700214 ut_assertok(dm_i2c_write(dev, 0x420, (uint8_t *)"AB", 2));
215 ut_assertok(dm_i2c_read(dev, 0x420, buf, 5));
Simon Glassecc2ed52014-12-10 08:55:55 -0700216 ut_assertok(memcmp(buf, "AB\0\0\0", sizeof(buf)));
217
218 /* Restore defaults */
219 sandbox_i2c_eeprom_set_offset_len(eeprom, 1);
220
221 return 0;
222}
223DM_TEST(dm_test_i2c_offset, DM_TESTF_SCAN_PDATA | DM_TESTF_SCAN_FDT);