esp-idf/components/spi_flash/spi_flash_chip_issi.c

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// Copyright 2015-2019 Espressif Systems (Shanghai) PTE LTD
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//
// 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
//
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// 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.
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#include <stdlib.h>
#include "spi_flash_chip_generic.h"
#include "spi_flash_chip_issi.h"
#include "spi_flash_defs.h"
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/* 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)
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{
/* 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;
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}
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;
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}
return ESP_OK;
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}
esp_err_t spi_flash_chip_issi_set_io_mode(esp_flash_t *chip)
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{
/* ISSI uses bit 6 of "basic" SR as Quad Enable */
const uint8_t BIT_QE = 1 << 6;
return spi_flash_common_set_io_mode(chip,
spi_flash_common_write_status_8b_wrsr,
spi_flash_common_read_status_8b_rdsr,
BIT_QE);
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}
esp_err_t spi_flash_chip_issi_get_io_mode(esp_flash_t *chip, esp_flash_io_mode_t* out_io_mode)
{
/* ISSI uses bit 6 of "basic" SR as Quad Enable */
const uint8_t BIT_QE = 1 << 6;
uint32_t sr;
esp_err_t ret = spi_flash_common_read_status_8b_rdsr(chip, &sr);
if (ret == ESP_OK) {
*out_io_mode = ((sr & BIT_QE)? SPI_FLASH_QOUT: 0);
}
return ret;
}
spi_flash_caps_t spi_flash_chip_issi_get_caps(esp_flash_t *chip)
{
spi_flash_caps_t caps_flags = 0;
// 32-bit-address flash is not supported
// flash-suspend is not supported
// flash read unique id.
caps_flags |= SPI_FLASH_CHIP_CAP_UNIQUE_ID;
return caps_flags;
}
static const char chip_name[] = "issi";
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// 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,
.timeout = &spi_flash_chip_generic_timeout,
.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,
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.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,
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.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,
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.page_size = 256,
.write_encrypted = spi_flash_chip_generic_write_encrypted,
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.wait_idle = spi_flash_chip_generic_wait_idle,
.set_io_mode = spi_flash_chip_issi_set_io_mode,
.get_io_mode = spi_flash_chip_issi_get_io_mode,
.read_reg = spi_flash_chip_generic_read_reg,
.yield = spi_flash_chip_generic_yield,
.sus_setup = spi_flash_chip_generic_suspend_cmd_conf,
.read_unique_id = spi_flash_chip_generic_read_unique_id,
.get_chip_caps = spi_flash_chip_issi_get_caps,
.config_host_io_mode = spi_flash_chip_generic_config_host_io_mode,
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};