74 lines
2.5 KiB
C
74 lines
2.5 KiB
C
// Copyright 2017 Espressif Systems (Shanghai) PTE LTD
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#include <stdlib.h>
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#include "spi_flash_lowlevel_driver.h"
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#include "spi_flash_lowlevel_generic.h"
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/* Driver for ISSI flash chip, as used in ESP32 D2WD */
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esp_flash_err_t issi_probe(esp_flash_chip_t *chip, uint32_t flash_id)
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{
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/* Check manufacturer and product IDs match our desired masks */
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const uint8_t MFG_ID = 0x9D;
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if (flash_id >> 16 != MFG_ID) {
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return FLASH_ERR_NOT_FOUND;
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}
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const uint16_t FLASH_ID_MASK = 0xCF00;
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const uint16_t FLASH_ID_VALUE = 0x4000;
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if ((flash_id & FLASH_ID_MASK) != FLASH_ID_VALUE) {
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return FLASH_ERR_NOT_FOUND;
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}
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return FLASH_OK;
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}
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esp_flash_err_t issi_set_read_mode(const esp_flash_chip_t *chip)
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{
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/* ISSI uses bit 6 of "basic" SR as Quad Enable */
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const uint8_t BIT_QE = 1<<6;
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return spi_flash_common_set_read_mode(chip, CMD_RDSR, CMD_WRSR, 8, BIT_QE);
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}
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const esp_flash_driver_t esp_flash_issi_chip_driver = {
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.probe = issi_probe,
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.read_id = spi_flash_generic_read_id,
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.detect_size = spi_flash_generic_detect_size,
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.erase_chip = spi_flash_generic_erase_chip,
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.erase_sector = spi_flash_generic_erase_sector,
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.erase_block = spi_flash_generic_erase_block,
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.sector_size = 4 * 1024,
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.block_erase_size = 64 * 1024,
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// TODO: support get/set chip write protect for ISSI flash
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.get_chip_write_protect = NULL,
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.set_chip_write_protect = NULL,
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// TODO support protected regions on ISSI flash
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.num_protectable_regions = 0,
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.protectable_regions = NULL,
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.get_protected_regions = NULL,
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.set_protected_regions = NULL,
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.read = spi_flash_generic_read,
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.write = spi_flash_generic_write,
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.page_program = spi_flash_generic_page_program,
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.page_size = 256,
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.write_encrypted = spi_flash_generic_write_encrypted,
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.write_enable = spi_flash_generic_write_enable,
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.wait_idle = spi_flash_generic_wait_idle,
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.set_read_mode = issi_set_read_mode,
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};
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