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/*
* This file is part of the MicroPython project, http://micropython.org/
*
* The MIT License (MIT)
*
* Copyright (c) 2016, 2017, 2018 Scott Shawcroft for Adafruit Industries
*
* 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 "supervisor/spi_flash_api.h"
#include "supervisor/shared/external_flash/common_commands.h"
#include "supervisor/shared/external_flash/qspi_flash.h"
void check_quad_enable(const external_flash_device *device) {
if (device->quad_enable_bit_mask == 0x00) {
return;
}
// Verify that QSPI mode is enabled.
uint8_t status;
if (device->single_status_byte) {
spi_flash_read_command(CMD_READ_STATUS, &status, 1);
} else {
spi_flash_read_command(CMD_READ_STATUS2, &status, 1);
}
// Check the quad enable bit.
if ((status & device->quad_enable_bit_mask) == 0) {
uint8_t full_status[2] = {0x00, device->quad_enable_bit_mask};
spi_flash_command(CMD_ENABLE_WRITE);
if (device->write_status_register_split) {
spi_flash_write_command(CMD_WRITE_STATUS_BYTE2, full_status + 1, 1);
} else if (device->single_status_byte) {
spi_flash_write_command(CMD_WRITE_STATUS_BYTE1, full_status + 1, 1);
} else {
spi_flash_write_command(CMD_WRITE_STATUS_BYTE1, full_status, 2);
}
}
}
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