sw_straps_test.c

// Copyright lowRISC contributors (OpenTitan project).
// Licensed under the Apache License, Version 2.0, see LICENSE for details.
// SPDX-License-Identifier: Apache-2.0
 
#include "sw/device/lib/base/macros.h"
#include "sw/device/lib/base/mmio.h"
#include "sw/device/lib/base/status.h"
#include "sw/device/lib/dif/dif_gpio.h"
#include "sw/device/lib/dif/dif_pinmux.h"
#include "sw/device/lib/runtime/log.h"
#include "sw/device/lib/testing/json/command.h"
#include "sw/device/lib/testing/pinmux_testutils.h"
#include "sw/device/lib/testing/test_framework/check.h"
#include "sw/device/lib/testing/test_framework/ottf_main.h"
#include "sw/device/lib/testing/test_framework/ujson_ottf.h"
#include "sw/device/lib/ujson/ujson.h"
 
#include "hw/top_earlgrey/sw/autogen/top_earlgrey.h"
 
static dif_gpio_t gpio;
static dif_pinmux_t pinmux;
OTTF_DEFINE_TEST_CONFIG();
 
status_t test_sw_strap_read(ujson_t *uj) {
  const char bits[] = {'s', 'w', 'W', 'S'};
  char pattern[4] = {0};
  uint32_t strap = pinmux_testutils_read_straps(&pinmux, &gpio);
  for (size_t i = 0; i < 3; ++i) {
    uint32_t v = (strap >> (2 * i)) & 3;
    pattern[2 - i] = bits[v];
  }
  LOG_INFO("strap = %02x, pattern = %s", strap, pattern);
  return RESP_OK_STATUS(uj, (int32_t)strap);
}
 
status_t command_processor(ujson_t *uj) {
  while (true) {
    test_command_t command;
    TRY(ujson_deserialize_test_command_t(uj, &command));
    switch (command) {
      case kTestCommandSwStrapRead:
        RESP_ERR(uj, test_sw_strap_read(uj));
        break;
      default:
        LOG_ERROR("Unrecognized command: %d", command);
        RESP_ERR(uj, INVALID_ARGUMENT());
    }
  }
  return OK_STATUS(0);
}
 
bool test_main(void) {
  CHECK_DIF_OK(dif_pinmux_init(
      mmio_region_from_addr(TOP_EARLGREY_PINMUX_AON_BASE_ADDR), &pinmux));
  CHECK_DIF_OK(
      dif_gpio_init(mmio_region_from_addr(TOP_EARLGREY_GPIO_BASE_ADDR), &gpio));
 
  uint32_t strap = pinmux_testutils_read_straps(&pinmux, &gpio);
  LOG_INFO("Initial sw_strap=%d", strap);
 
  ujson_t uj = ujson_ottf_console();
  return status_ok(command_processor(&uj));
}