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1 /*
2  * Copyright (C) 2013 Google, Inc
3  *
4  * SPDX-License-Identifier:     GPL-2.0+
5  */
6
7 #include <common.h>
8 #include <dm.h>
9 #include <fdtdec.h>
10 #include <spi.h>
11 #include <spi_flash.h>
12 #include <asm/state.h>
13 #include <dm/device-internal.h>
14 #include <dm/test.h>
15 #include <dm/uclass-internal.h>
16 #include <dm/util.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 = 1;
26         struct spi_cs_info info;
27         int of_offset;
28
29         ut_asserteq(-ENODEV, uclass_find_device_by_seq(UCLASS_SPI, busnum,
30                                                        false, &bus));
31
32         /*
33          * spi_post_bind() will bind devices to chip selects. Check this then
34          * remove the emulation and the slave device.
35          */
36         ut_asserteq(0, uclass_get_device_by_seq(UCLASS_SPI, busnum, &bus));
37         ut_assertok(spi_cs_info(bus, cs, &info));
38         of_offset = info.dev->of_offset;
39         device_remove(info.dev);
40         device_unbind(info.dev);
41
42         /*
43          * Even though the device is gone, the sandbox SPI drivers always
44          * reports that CS 0 is present
45          */
46         ut_assertok(spi_cs_info(bus, cs, &info));
47         ut_asserteq_ptr(NULL, info.dev);
48
49         /* This finds nothing because we removed the device */
50         ut_asserteq(-ENODEV, spi_find_bus_and_cs(busnum, cs, &bus, &dev));
51         ut_asserteq(-ENODEV, spi_get_bus_and_cs(busnum, cs, speed, mode,
52                                                 NULL, 0, &bus, &slave));
53
54         /*
55          * This forces the device to be re-added, but there is no emulation
56          * connected so the probe will fail. We require that bus is left
57          * alone on failure, and that the spi_get_bus_and_cs() does not add
58          * a 'partially-inited' device.
59          */
60         ut_asserteq(-ENODEV, spi_find_bus_and_cs(busnum, cs, &bus, &dev));
61         ut_asserteq(-ENOENT, spi_get_bus_and_cs(busnum, cs, speed, mode,
62                                                 "spi_flash_std", "name", &bus,
63                                                 &slave));
64         sandbox_sf_unbind_emul(state_get_current(), busnum, cs);
65         ut_assertok(spi_cs_info(bus, cs, &info));
66         ut_asserteq_ptr(NULL, info.dev);
67
68         /* Add the emulation and try again */
69         ut_assertok(sandbox_sf_bind_emul(state, busnum, cs, bus, of_offset,
70                                          "name"));
71         ut_assertok(spi_find_bus_and_cs(busnum, cs, &bus, &dev));
72         ut_assertok(spi_get_bus_and_cs(busnum, cs, speed, mode,
73                                        "spi_flash_std", "name", &bus, &slave));
74
75         ut_assertok(spi_cs_info(bus, cs, &info));
76         ut_asserteq_ptr(info.dev, slave->dev);
77
78         /* We should be able to add something to another chip select */
79         ut_assertok(sandbox_sf_bind_emul(state, busnum, cs_b, bus, of_offset,
80                                          "name"));
81         ut_assertok(spi_get_bus_and_cs(busnum, cs_b, speed, mode,
82                                        "spi_flash_std", "name", &bus, &slave));
83         ut_assertok(spi_cs_info(bus, cs_b, &info));
84         ut_asserteq_ptr(info.dev, slave->dev);
85
86         /*
87          * Since we are about to destroy all devices, we must tell sandbox
88          * to forget the emulation device
89          */
90         sandbox_sf_unbind_emul(state_get_current(), busnum, cs);
91         sandbox_sf_unbind_emul(state_get_current(), busnum, cs_b);
92
93         return 0;
94 }
95 DM_TEST(dm_test_spi_find, DM_TESTF_SCAN_PDATA | DM_TESTF_SCAN_FDT);
96
97 /* Test that sandbox SPI works correctly */
98 static int dm_test_spi_xfer(struct unit_test_state *uts)
99 {
100         struct spi_slave *slave;
101         struct udevice *bus;
102         const int busnum = 0, cs = 0, mode = 0;
103         const char dout[5] = {0x9f};
104         unsigned char din[5];
105
106         ut_assertok(spi_get_bus_and_cs(busnum, cs, 1000000, mode, NULL, 0,
107                                        &bus, &slave));
108         ut_assertok(spi_claim_bus(slave));
109         ut_assertok(spi_xfer(slave, 40, dout, din,
110                              SPI_XFER_BEGIN | SPI_XFER_END));
111         ut_asserteq(0xff, din[0]);
112         ut_asserteq(0x20, din[1]);
113         ut_asserteq(0x20, din[2]);
114         ut_asserteq(0x15, din[3]);
115         spi_release_bus(slave);
116
117         /*
118          * Since we are about to destroy all devices, we must tell sandbox
119          * to forget the emulation device
120          */
121 #ifdef CONFIG_DM_SPI_FLASH
122         sandbox_sf_unbind_emul(state_get_current(), busnum, cs);
123 #endif
124
125         return 0;
126 }
127 DM_TEST(dm_test_spi_xfer, DM_TESTF_SCAN_PDATA | DM_TESTF_SCAN_FDT);