OVMS3-idf/components/spi_flash/spi_flash_chip_issi.c
2019-08-08 23:18:01 +08:00

77 lines
2.7 KiB
C

// Copyright 2015-2019 Espressif Systems (Shanghai) PTE LTD
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include <stdlib.h>
#include "spi_flash_chip_generic.h"
#include "spi_flash_defs.h"
/* Driver for ISSI flash chip, as used in ESP32 D2WD */
esp_err_t spi_flash_chip_issi_probe(esp_flash_t *chip, uint32_t flash_id)
{
/* Check manufacturer and product IDs match our desired masks */
const uint8_t MFG_ID = 0x9D;
if (flash_id >> 16 != MFG_ID) {
return ESP_ERR_NOT_FOUND;
}
const uint16_t FLASH_ID_MASK = 0xCF00;
const uint16_t FLASH_ID_VALUE = 0x4000;
if ((flash_id & FLASH_ID_MASK) != FLASH_ID_VALUE) {
return ESP_ERR_NOT_FOUND;
}
return ESP_OK;
}
esp_err_t spi_flash_chip_issi_set_read_mode(esp_flash_t *chip)
{
/* ISSI uses bit 6 of "basic" SR as Quad Enable */
const uint8_t BIT_QE = 1 << 6;
return spi_flash_common_set_read_mode(chip, CMD_RDSR, CMD_WRSR, 8, BIT_QE);
}
static const char chip_name[] = "issi";
// The issi chip can use the functions for generic chips except from set read mode and probe,
// So we only replace these two functions.
const spi_flash_chip_t esp_flash_chip_issi = {
.name = chip_name,
.probe = spi_flash_chip_issi_probe,
.reset = spi_flash_chip_generic_reset,
.detect_size = spi_flash_chip_generic_detect_size,
.erase_chip = spi_flash_chip_generic_erase_chip,
.erase_sector = spi_flash_chip_generic_erase_sector,
.erase_block = spi_flash_chip_generic_erase_block,
.sector_size = 4 * 1024,
.block_erase_size = 64 * 1024,
.get_chip_write_protect = spi_flash_chip_generic_get_write_protect,
.set_chip_write_protect = spi_flash_chip_generic_set_write_protect,
// TODO support protected regions on ISSI flash
.num_protectable_regions = 0,
.protectable_regions = NULL,
.get_protected_regions = NULL,
.set_protected_regions = NULL,
.read = spi_flash_chip_generic_read,
.write = spi_flash_chip_generic_write,
.program_page = spi_flash_chip_generic_page_program,
.page_size = 256,
.write_encrypted = spi_flash_chip_generic_write_encrypted,
.wait_idle = spi_flash_chip_generic_wait_idle,
.set_read_mode = spi_flash_chip_issi_set_read_mode,
};