test/dm/spi.c

   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 <dm/device-internal.h>
  13 #include <dm/test.h>
  14 #include <dm/uclass-internal.h>
  15 #include <dm/ut.h>
  16 #include <dm/util.h>
  17 #include <asm/state.h>
  18
  19 /* Test that we can find buses and chip-selects */
  20 static int dm_test_spi_find(struct dm_test_state *dms)
  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         sandbox_sf_unbind_emul(state_get_current(), busnum, cs);
  40         device_remove(info.dev);
  41         device_unbind(info.dev);
  42
  43         /*
  44          * Even though the device is gone, the sandbox SPI drivers always
  45          * reports that CS 0 is present
  46          */
  47         ut_assertok(spi_cs_info(bus, cs, &info));
  48         ut_asserteq_ptr(info.dev, NULL);
  49
  50         /* This finds nothing because we removed the device */
  51         ut_asserteq(-ENODEV, spi_find_bus_and_cs(busnum, cs, &bus, &dev));
  52         ut_asserteq(-ENODEV, spi_get_bus_and_cs(busnum, cs, speed, mode,
  53                                                 NULL, 0, &bus, &slave));
  54
  55         /*
  56          * This forces the device to be re-added, but there is no emulation
  57          * connected so the probe will fail. We require that bus is left
  58          * alone on failure, and that the spi_get_bus_and_cs() does not add
  59          * a 'partially-inited' device.
  60          */
  61         ut_asserteq(-ENODEV, spi_find_bus_and_cs(busnum, cs, &bus, &dev));
  62         ut_asserteq(-ENOENT, spi_get_bus_and_cs(busnum, cs, speed, mode,
  63                                                 "spi_flash_std", "name", &bus,
  64                                                 &slave));
  65         ut_assertok(spi_cs_info(bus, cs, &info));
  66         ut_asserteq_ptr(info.dev, NULL);
  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 dm_test_state *dms)
  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);