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109 lines
3.8 KiB
C
109 lines
3.8 KiB
C
// Copyright 2015-2019 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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//
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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_chip_generic.h"
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#include "spi_flash_defs.h"
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#define FLASH_ID_MASK 0xFF00
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#define FLASH_SIZE_MASK 0xFF
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#define GD25Q_PRODUCT_ID 0x4000
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#define GD25LQ_PRODUCT_ID 0x6000
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#define WRSR_16B_REQUIRED(chip_id) (((chip_id) & FLASH_ID_MASK) == GD25LQ_PRODUCT_ID || \
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((chip_id) & FLASH_SIZE_MASK) <= 0x15)
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/* Driver for GD flash chip */
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esp_err_t spi_flash_chip_gd_probe(esp_flash_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 = 0xC8;
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if (flash_id >> 16 != MFG_ID) {
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return ESP_ERR_NOT_FOUND;
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}
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uint32_t product_id = flash_id & FLASH_ID_MASK;
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if (product_id != GD25Q_PRODUCT_ID && product_id != GD25LQ_PRODUCT_ID) {
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return ESP_ERR_NOT_FOUND;
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}
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return ESP_OK;
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}
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esp_err_t spi_flash_chip_gd_set_io_mode(esp_flash_t *chip)
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{
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if (WRSR_16B_REQUIRED(chip->chip_id)) {
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const uint32_t qe = 1<<9;
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return spi_flash_common_set_io_mode(chip,
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spi_flash_common_write_status_16b_wrsr,
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spi_flash_common_read_status_16b_rdsr_rdsr2,
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qe);
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} else {
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const uint32_t qe = 1<<1;
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return spi_flash_common_set_io_mode(chip,
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spi_flash_common_write_status_8b_wrsr2,
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spi_flash_common_read_status_8b_rdsr2,
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qe);
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}
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}
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esp_err_t spi_flash_chip_gd_get_io_mode(esp_flash_t *chip, esp_flash_io_mode_t* out_io_mode)
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{
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/* GD uses bit 1 of SR2 as Quad Enable */
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const uint8_t BIT_QE = 1 << 1;
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uint32_t sr;
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esp_err_t ret = spi_flash_common_read_status_8b_rdsr2(chip, &sr);
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if (ret == ESP_OK) {
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*out_io_mode = ((sr & BIT_QE)? SPI_FLASH_QOUT: 0);
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}
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return ret;
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}
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static const char chip_name[] = "gd";
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// The issi chip can use the functions for generic chips except from set read mode and probe,
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// So we only replace these two functions.
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const spi_flash_chip_t esp_flash_chip_gd = {
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.name = chip_name,
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.probe = spi_flash_chip_gd_probe,
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.reset = spi_flash_chip_generic_reset,
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.detect_size = spi_flash_chip_generic_detect_size,
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.erase_chip = spi_flash_chip_generic_erase_chip,
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.erase_sector = spi_flash_chip_generic_erase_sector,
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.erase_block = spi_flash_chip_generic_erase_block,
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.sector_size = 4 * 1024,
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.block_erase_size = 64 * 1024,
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.get_chip_write_protect = spi_flash_chip_generic_get_write_protect,
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.set_chip_write_protect = spi_flash_chip_generic_set_write_protect,
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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_chip_generic_read,
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.write = spi_flash_chip_generic_write,
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.program_page = spi_flash_chip_generic_page_program,
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.page_size = 256,
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.write_encrypted = spi_flash_chip_generic_write_encrypted,
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.wait_idle = spi_flash_chip_generic_wait_idle,
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.set_io_mode = spi_flash_chip_gd_set_io_mode,
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.get_io_mode = spi_flash_chip_gd_get_io_mode,
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};
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