xref: /openbmc/u-boot/test/dm/spi.c (revision 9d1b2987)
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);
128