text: /*
   * This file is part of the MicroPython project, http://micropython.org/
   *
   * The MIT License (MIT)
   *
   * Copyright (c) 2021 Damien P. George
   *
   * Permission is hereby granted, free of charge, to any person obtaining a copy
   * of this software and associated documentation files (the "Software"), to deal
   * in the Software without restriction, including without limitation the rights
   * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
   * copies of the Software, and to permit persons to whom the Software is
   * furnished to do so, subject to the following conditions:
   *
   * The above copyright notice and this permission notice shall be included in
   * all copies or substantial portions of the Software.
   *
   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
   * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
   * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
   * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
   * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
   * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
   * THE SOFTWARE.
   */
  
  #include "py/obj.h"
  #include "storage.h"
  
  #define CMD_EXIT_4_BYTE_ADDRESS_MODE (0xE9)
  
  STATIC const mp_soft_spi_obj_t soft_spi_bus = {
      .delay_half = MICROPY_HW_SOFTSPI_MIN_DELAY,
      .polarity = 0,
      .phase = 0,
      .sck = MICROPY_HW_SPIFLASH_SCK,
      .mosi = MICROPY_HW_SPIFLASH_MOSI,
      .miso = MICROPY_HW_SPIFLASH_MISO,
  };
  
  STATIC mp_spiflash_cache_t spi_bdev_cache;
  
  const mp_spiflash_config_t spiflash_config = {
      .bus_kind = MP_SPIFLASH_BUS_SPI,
      .bus.u_spi.cs = MICROPY_HW_SPIFLASH_NSS,
      .bus.u_spi.data = (void *)&soft_spi_bus,
      .bus.u_spi.proto = &mp_soft_spi_proto,
      .cache = &spi_bdev_cache,
  };
  
  spi_bdev_t spi_bdev;
  
  int32_t board_bdev_ioctl(void) {
      int32_t ret = spi_bdev_ioctl(&spi_bdev, BDEV_IOCTL_INIT, (uint32_t)&spiflash_config);
  
      // Exit 4-byte address mode
      uint8_t cmd = CMD_EXIT_4_BYTE_ADDRESS_MODE;
      mp_hal_pin_write(MICROPY_HW_SPIFLASH_NSS, 0);
      mp_soft_spi_proto.transfer(MP_OBJ_FROM_PTR(&soft_spi_bus), 1, &cmd, NULL);
      mp_hal_pin_write(MICROPY_HW_SPIFLASH_NSS, 1);
  
      return ret;
  }
  