LXR uboot/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/test.h>
  17#include <test/ut.h>
  18
  19/* Test that we can find buses and chip-selects */
  20static 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        ofnode node;
  28
  29        ut_asserteq(-ENODEV, uclass_find_device_by_seq(UCLASS_SPI, busnum,
  30                                                       false, &bus));
  31
  32        /*
  33         * The post_bind() method will bind devices to chip selects. Check
  34         * this then 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        node = dev_ofnode(info.dev);
  39        device_remove(info.dev, DM_REMOVE_NORMAL);
  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                                                "jedec_spi_nor", "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, node,
  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                                       "jedec_spi_nor", "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, node,
  80                                         "name"));
  81        ut_asserteq(-EINVAL, spi_get_bus_and_cs(busnum, cs_b, speed, mode,
  82                                       "jedec_spi_nor", "name", &bus, &slave));
  83        ut_asserteq(-EINVAL, spi_cs_info(bus, cs_b, &info));
  84        ut_asserteq_ptr(NULL, info.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}
  95DM_TEST(dm_test_spi_find, UT_TESTF_SCAN_PDATA | UT_TESTF_SCAN_FDT);
  96
  97/* Test that sandbox SPI works correctly */
  98static 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#if CONFIG_IS_ENABLED(DM_SPI_FLASH)
 122        sandbox_sf_unbind_emul(state_get_current(), busnum, cs);
 123#endif
 124
 125        return 0;
 126}
 127DM_TEST(dm_test_spi_xfer, UT_TESTF_SCAN_PDATA | UT_TESTF_SCAN_FDT);
 128