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[oweals/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 <common.h>
7 #include <dm.h>
8 #include <fdtdec.h>
9 #include <spi.h>
10 #include <spi_flash.h>
11 #include <asm/state.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/ut.h>
17
18 /* Test that we can find buses and chip-selects */
19 static int dm_test_spi_find(struct unit_test_state *uts)
20 {
21         struct sandbox_state *state = state_get_current();
22         struct spi_slave *slave;
23         struct udevice *bus, *dev;
24         const int busnum = 0, cs = 0, mode = 0, speed = 1000000, cs_b = 1;
25         struct spi_cs_info info;
26         ofnode node;
27
28         ut_asserteq(-ENODEV, uclass_find_device_by_seq(UCLASS_SPI, busnum,
29                                                        false, &bus));
30
31         /*
32          * The post_bind() method will bind devices to chip selects. Check
33          * this then remove the emulation and the slave device.
34          */
35         ut_asserteq(0, uclass_get_device_by_seq(UCLASS_SPI, busnum, &bus));
36         ut_assertok(spi_cs_info(bus, cs, &info));
37         node = dev_ofnode(info.dev);
38         device_remove(info.dev, DM_REMOVE_NORMAL);
39         device_unbind(info.dev);
40
41         /*
42          * Even though the device is gone, the sandbox SPI drivers always
43          * reports that CS 0 is present
44          */
45         ut_assertok(spi_cs_info(bus, cs, &info));
46         ut_asserteq_ptr(NULL, info.dev);
47
48         /* This finds nothing because we removed the device */
49         ut_asserteq(-ENODEV, spi_find_bus_and_cs(busnum, cs, &bus, &dev));
50         ut_asserteq(-ENODEV, spi_get_bus_and_cs(busnum, cs, speed, mode,
51                                                 NULL, 0, &bus, &slave));
52
53         /*
54          * This forces the device to be re-added, but there is no emulation
55          * connected so the probe will fail. We require that bus is left
56          * alone on failure, and that the spi_get_bus_and_cs() does not add
57          * a 'partially-inited' device.
58          */
59         ut_asserteq(-ENODEV, spi_find_bus_and_cs(busnum, cs, &bus, &dev));
60         ut_asserteq(-ENOENT, spi_get_bus_and_cs(busnum, cs, speed, mode,
61                                                 "spi_flash_std", "name", &bus,
62                                                 &slave));
63         sandbox_sf_unbind_emul(state_get_current(), busnum, cs);
64         ut_assertok(spi_cs_info(bus, cs, &info));
65         ut_asserteq_ptr(NULL, info.dev);
66
67         /* Add the emulation and try again */
68         ut_assertok(sandbox_sf_bind_emul(state, busnum, cs, bus, node,
69                                          "name"));
70         ut_assertok(spi_find_bus_and_cs(busnum, cs, &bus, &dev));
71         ut_assertok(spi_get_bus_and_cs(busnum, cs, speed, mode,
72                                        "spi_flash_std", "name", &bus, &slave));
73
74         ut_assertok(spi_cs_info(bus, cs, &info));
75         ut_asserteq_ptr(info.dev, slave->dev);
76
77         /* We should be able to add something to another chip select */
78         ut_assertok(sandbox_sf_bind_emul(state, busnum, cs_b, bus, node,
79                                          "name"));
80         ut_assertok(spi_get_bus_and_cs(busnum, cs_b, speed, mode,
81                                        "spi_flash_std", "name", &bus, &slave));
82         ut_assertok(spi_cs_info(bus, cs_b, &info));
83         ut_asserteq_ptr(info.dev, slave->dev);
84
85         /*
86          * Since we are about to destroy all devices, we must tell sandbox
87          * to forget the emulation device
88          */
89         sandbox_sf_unbind_emul(state_get_current(), busnum, cs);
90         sandbox_sf_unbind_emul(state_get_current(), busnum, cs_b);
91
92         return 0;
93 }
94 DM_TEST(dm_test_spi_find, DM_TESTF_SCAN_PDATA | DM_TESTF_SCAN_FDT);
95
96 /* Test that sandbox SPI works correctly */
97 static int dm_test_spi_xfer(struct unit_test_state *uts)
98 {
99         struct spi_slave *slave;
100         struct udevice *bus;
101         const int busnum = 0, cs = 0, mode = 0;
102         const char dout[5] = {0x9f};
103         unsigned char din[5];
104
105         ut_assertok(spi_get_bus_and_cs(busnum, cs, 1000000, mode, NULL, 0,
106                                        &bus, &slave));
107         ut_assertok(spi_claim_bus(slave));
108         ut_assertok(spi_xfer(slave, 40, dout, din,
109                              SPI_XFER_BEGIN | SPI_XFER_END));
110         ut_asserteq(0xff, din[0]);
111         ut_asserteq(0x20, din[1]);
112         ut_asserteq(0x20, din[2]);
113         ut_asserteq(0x15, din[3]);
114         spi_release_bus(slave);
115
116         /*
117          * Since we are about to destroy all devices, we must tell sandbox
118          * to forget the emulation device
119          */
120 #ifdef CONFIG_DM_SPI_FLASH
121         sandbox_sf_unbind_emul(state_get_current(), busnum, cs);
122 #endif
123
124         return 0;
125 }
126 DM_TEST(dm_test_spi_xfer, DM_TESTF_SCAN_PDATA | DM_TESTF_SCAN_FDT);