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/ut.h>
  17
  18/* Test that we can find buses and chip-selects */
  19static 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        ofnode node;
  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        node = dev_ofnode(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, node,
  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, node,
  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}
  94DM_TEST(dm_test_spi_find, DM_TESTF_SCAN_PDATA | DM_TESTF_SCAN_FDT);
  95
  96/* Test that sandbox SPI works correctly */
  97static 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}
 126DM_TEST(dm_test_spi_xfer, DM_TESTF_SCAN_PDATA | DM_TESTF_SCAN_FDT);
 127