1 // SPDX-License-Identifier: GPL-2.0+
3 * Copyright (C) 2013 Google, Inc
10 #include <asm/state.h>
12 #include <dm/device-internal.h>
14 #include <dm/uclass-internal.h>
16 #include <test/test.h>
19 /* Test that we can find buses and chip-selects */
20 static int dm_test_spi_find(struct unit_test_state *uts)
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;
30 * The post_bind() method will bind devices to chip selects. Check
31 * this then remove the emulation and the slave device.
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);
40 * Even though the device is gone, the sandbox SPI drivers always
41 * reports that CS 0 is present
43 ut_assertok(spi_cs_info(bus, cs, &info));
44 ut_asserteq_ptr(NULL, info.dev);
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));
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.
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,
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);
64 /* Add the emulation and try again */
65 ut_assertok(sandbox_sf_bind_emul(state, busnum, cs, bus, node,
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));
71 ut_assertok(spi_cs_info(bus, cs, &info));
72 ut_asserteq_ptr(info.dev, slave->dev);
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,
77 ut_asserteq(-EINVAL, _spi_get_bus_and_cs(busnum, cs_b, speed, mode,
78 "jedec_spi_nor", "name", &bus,
80 ut_asserteq(-EINVAL, spi_cs_info(bus, cs_b, &info));
81 ut_asserteq_ptr(NULL, info.dev);
84 * Since we are about to destroy all devices, we must tell sandbox
85 * to forget the emulation device
87 sandbox_sf_unbind_emul(state_get_current(), busnum, cs);
88 sandbox_sf_unbind_emul(state_get_current(), busnum, cs_b);
92 DM_TEST(dm_test_spi_find, UTF_SCAN_PDATA | UTF_SCAN_FDT);
94 /* dm_test_spi_switch_slaves - Helper function to check whether spi_claim_bus
95 * operates correctly with two spi slaves.
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.
100 * @uts - unit test state
101 * @slave_a - first spi slave used for testing
102 * @slave_b - second spi slave used for testing
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)
109 struct dm_spi_bus *bus_data;
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));
115 bus = dev_get_parent(slave_a->dev);
116 bus_data = dev_get_uclass_priv(bus);
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);
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);
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);
139 static int dm_test_spi_claim_bus(struct unit_test_state *uts)
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;
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));
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);
156 /* Different max_hz, same mode. */
157 slave_a->mode = slave_b->mode;
158 dm_test_spi_switch_slaves(uts, slave_a, slave_b);
161 * Same max_hz, different mode.
162 * Restore original mode for slave_a, from platdata.
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);
171 DM_TEST(dm_test_spi_claim_bus, UTF_SCAN_PDATA | UTF_SCAN_FDT);
173 /* Test that sandbox SPI works correctly */
174 static int dm_test_spi_xfer(struct unit_test_state *uts)
176 struct spi_slave *slave;
178 const int busnum = 0, cs = 0;
179 const char dout[5] = {0x9f};
180 unsigned char din[5];
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);
193 * Since we are about to destroy all devices, we must tell sandbox
194 * to forget the emulation device
196 #if CONFIG_IS_ENABLED(DM_SPI_FLASH)
197 sandbox_sf_unbind_emul(state_get_current(), busnum, cs);
202 DM_TEST(dm_test_spi_xfer, UTF_SCAN_PDATA | UTF_SCAN_FDT);