]> Git Repo - u-boot.git/blob - test/dm/spi.c
Merge branch 'master' of https://source.denx.de/u-boot/custodians/u-boot-sh
[u-boot.git] / test / dm / spi.c
1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3  * Copyright (C) 2013 Google, Inc
4  */
5
6 #include <dm.h>
7 #include <fdtdec.h>
8 #include <spi.h>
9 #include <spi_flash.h>
10 #include <asm/state.h>
11 #include <asm/test.h>
12 #include <dm/device-internal.h>
13 #include <dm/test.h>
14 #include <dm/uclass-internal.h>
15 #include <dm/util.h>
16 #include <test/test.h>
17 #include <test/ut.h>
18
19 /* Test that we can find buses and chip-selects */
20 static int dm_test_spi_find(struct unit_test_state *uts)
21 {
22         struct sandbox_state *state = state_get_current();
23         struct spi_slave *slave;
24         struct udevice *bus, *dev;
25         const int busnum = 0, cs = 0, mode = 0, speed = 1000000, cs_b = 2;
26         struct spi_cs_info info;
27         ofnode node;
28
29         /*
30          * The post_bind() method will bind devices to chip selects. Check
31          * this then remove the emulation and the slave device.
32          */
33         ut_asserteq(0, uclass_get_device_by_seq(UCLASS_SPI, busnum, &bus));
34         ut_assertok(spi_cs_info(bus, cs, &info));
35         node = dev_ofnode(info.dev);
36         device_remove(info.dev, DM_REMOVE_NORMAL);
37         device_unbind(info.dev);
38
39         /*
40          * Even though the device is gone, the sandbox SPI drivers always
41          * reports that CS 0 is present
42          */
43         ut_assertok(spi_cs_info(bus, cs, &info));
44         ut_asserteq_ptr(NULL, info.dev);
45
46         /* This finds nothing because we removed the device */
47         ut_asserteq(-ENODEV, spi_find_bus_and_cs(busnum, cs, &bus, &dev));
48         ut_asserteq(-ENODEV, spi_get_bus_and_cs(busnum, cs, &bus, &slave));
49
50         /*
51          * This forces the device to be re-added, but there is no emulation
52          * connected so the probe will fail. We require that bus is left
53          * alone on failure, and that the _spi_get_bus_and_cs() does not add
54          * a 'partially-inited' device.
55          */
56         ut_asserteq(-ENODEV, spi_find_bus_and_cs(busnum, cs, &bus, &dev));
57         ut_asserteq(-ENOENT, _spi_get_bus_and_cs(busnum, cs, speed, mode,
58                                                  "jedec_spi_nor", "name", &bus,
59                                                  &slave));
60         sandbox_sf_unbind_emul(state_get_current(), busnum, cs);
61         ut_assertok(spi_cs_info(bus, cs, &info));
62         ut_asserteq_ptr(NULL, info.dev);
63
64         /* Add the emulation and try again */
65         ut_assertok(sandbox_sf_bind_emul(state, busnum, cs, bus, node,
66                                          "name"));
67         ut_assertok(spi_find_bus_and_cs(busnum, cs, &bus, &dev));
68         ut_assertok(_spi_get_bus_and_cs(busnum, cs, speed, mode,
69                                         "jedec_spi_nor", "name", &bus, &slave));
70
71         ut_assertok(spi_cs_info(bus, cs, &info));
72         ut_asserteq_ptr(info.dev, slave->dev);
73
74         /* We should be able to add something to another chip select */
75         ut_assertok(sandbox_sf_bind_emul(state, busnum, cs_b, bus, node,
76                                          "name"));
77         ut_asserteq(-EINVAL, _spi_get_bus_and_cs(busnum, cs_b, speed, mode,
78                                                  "jedec_spi_nor", "name", &bus,
79                                                  &slave));
80         ut_asserteq(-EINVAL, spi_cs_info(bus, cs_b, &info));
81         ut_asserteq_ptr(NULL, info.dev);
82
83         /*
84          * Since we are about to destroy all devices, we must tell sandbox
85          * to forget the emulation device
86          */
87         sandbox_sf_unbind_emul(state_get_current(), busnum, cs);
88         sandbox_sf_unbind_emul(state_get_current(), busnum, cs_b);
89
90         return 0;
91 }
92 DM_TEST(dm_test_spi_find, UTF_SCAN_PDATA | UTF_SCAN_FDT);
93
94 /* dm_test_spi_switch_slaves - Helper function to check whether spi_claim_bus
95  *                             operates correctly with two spi slaves.
96  *
97  * Check that switching back and forth between two slaves claiming the bus
98  * will update dm_spi_bus->speed and sandbox_spi bus speed/mode correctly.
99  *
100  * @uts - unit test state
101  * @slave_a - first spi slave used for testing
102  * @slave_b - second spi slave used for testing
103  */
104 static int dm_test_spi_switch_slaves(struct unit_test_state *uts,
105                                      struct spi_slave *slave_a,
106                                      struct spi_slave *slave_b)
107 {
108         struct udevice *bus;
109         struct dm_spi_bus *bus_data;
110
111         /* Check that slaves are on the same bus */
112         ut_asserteq_ptr(dev_get_parent(slave_a->dev),
113                         dev_get_parent(slave_b->dev));
114
115         bus = dev_get_parent(slave_a->dev);
116         bus_data = dev_get_uclass_priv(bus);
117
118         ut_assertok(spi_claim_bus(slave_a));
119         ut_asserteq(slave_a->max_hz, bus_data->speed);
120         ut_asserteq(slave_a->max_hz, sandbox_spi_get_speed(bus));
121         ut_asserteq(slave_a->mode, sandbox_spi_get_mode(bus));
122         spi_release_bus(slave_a);
123
124         ut_assertok(spi_claim_bus(slave_b));
125         ut_asserteq(slave_b->max_hz, bus_data->speed);
126         ut_asserteq(slave_b->max_hz, sandbox_spi_get_speed(bus));
127         ut_asserteq(slave_b->mode, sandbox_spi_get_mode(bus));
128         spi_release_bus(slave_b);
129
130         ut_assertok(spi_claim_bus(slave_a));
131         ut_asserteq(slave_a->max_hz, bus_data->speed);
132         ut_asserteq(slave_a->max_hz, sandbox_spi_get_speed(bus));
133         ut_asserteq(slave_a->mode, sandbox_spi_get_mode(bus));
134         spi_release_bus(slave_a);
135
136         return 0;
137 }
138
139 static int dm_test_spi_claim_bus(struct unit_test_state *uts)
140 {
141         struct udevice *bus;
142         struct spi_slave *slave_a, *slave_b;
143         struct dm_spi_slave_plat *slave_plat;
144         const int busnum = 0, cs_a = 0, cs_b = 1;
145
146         /* Get spi slave on CS0 */
147         ut_assertok(spi_get_bus_and_cs(busnum, cs_a, &bus, &slave_a));
148         /* Get spi slave on CS1 */
149         ut_assertok(spi_get_bus_and_cs(busnum, cs_b, &bus, &slave_b));
150
151         /* Different max_hz, different mode. */
152         ut_assert(slave_a->max_hz != slave_b->max_hz);
153         ut_assert(slave_a->mode != slave_b->mode);
154         dm_test_spi_switch_slaves(uts, slave_a, slave_b);
155
156         /* Different max_hz, same mode. */
157         slave_a->mode = slave_b->mode;
158         dm_test_spi_switch_slaves(uts, slave_a, slave_b);
159
160         /*
161          * Same max_hz, different mode.
162          * Restore original mode for slave_a, from platdata.
163          */
164         slave_plat = dev_get_parent_plat(slave_a->dev);
165         slave_a->mode = slave_plat->mode;
166         slave_a->max_hz = slave_b->max_hz;
167         dm_test_spi_switch_slaves(uts, slave_a, slave_b);
168
169         return 0;
170 }
171 DM_TEST(dm_test_spi_claim_bus, UTF_SCAN_PDATA | UTF_SCAN_FDT);
172
173 /* Test that sandbox SPI works correctly */
174 static int dm_test_spi_xfer(struct unit_test_state *uts)
175 {
176         struct spi_slave *slave;
177         struct udevice *bus;
178         const int busnum = 0, cs = 0;
179         const char dout[5] = {0x9f};
180         unsigned char din[5];
181
182         ut_assertok(spi_get_bus_and_cs(busnum, cs, &bus, &slave));
183         ut_assertok(spi_claim_bus(slave));
184         ut_assertok(spi_xfer(slave, 40, dout, din,
185                              SPI_XFER_BEGIN | SPI_XFER_END));
186         ut_asserteq(0xff, din[0]);
187         ut_asserteq(0x20, din[1]);
188         ut_asserteq(0x20, din[2]);
189         ut_asserteq(0x15, din[3]);
190         spi_release_bus(slave);
191
192         /*
193          * Since we are about to destroy all devices, we must tell sandbox
194          * to forget the emulation device
195          */
196 #if CONFIG_IS_ENABLED(DM_SPI_FLASH)
197         sandbox_sf_unbind_emul(state_get_current(), busnum, cs);
198 #endif
199
200         return 0;
201 }
202 DM_TEST(dm_test_spi_xfer, UTF_SCAN_PDATA | UTF_SCAN_FDT);
This page took 0.034772 seconds and 4 git commands to generate.