57 lines
2.3 KiB
C
57 lines
2.3 KiB
C
/*
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* This file is part of the MicroPython project, http://micropython.org/
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*
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* The MIT License (MIT)
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*
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* Copyright (c) 2016, 2017, 2018 Scott Shawcroft for Adafruit Industries
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include "supervisor/spi_flash_api.h"
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#include "supervisor/shared/external_flash/common_commands.h"
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void check_quad_enable(const external_flash_device* device) {
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if (device->quad_enable_bit_mask == 0x00) {
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return;
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}
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// Verify that QSPI mode is enabled.
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uint8_t status;
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if (device->single_status_byte) {
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spi_flash_read_command(CMD_READ_STATUS, &status, 1);
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} else {
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spi_flash_read_command(CMD_READ_STATUS2, &status, 1);
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}
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// Check the quad enable bit.
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if ((status & device->quad_enable_bit_mask) == 0) {
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uint8_t full_status[2] = {0x00, device->quad_enable_bit_mask};
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spi_flash_command(CMD_ENABLE_WRITE);
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if (device->write_status_register_split) {
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spi_flash_write_command(CMD_WRITE_STATUS_BYTE2, full_status + 1, 1);
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} else if (device->single_status_byte) {
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spi_flash_write_command(CMD_WRITE_STATUS_BYTE1, full_status + 1, 1);
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} else {
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spi_flash_write_command(CMD_WRITE_STATUS_BYTE1, full_status, 2);
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}
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}
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}
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