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         int of_offset;
  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         of_offset = dev_of_offset(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, of_offset,
  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, of_offset,
  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);