fd7b794e81
This change allows readonly FATFS to be mounted without wear levelling support. This will provide the customers a simple way to mount FATFS images generated on host and flashed onto the chip during factory provisioning. Since NVS encryption is not supported yet and NVS entry size is limited, the change will provide an easy alternative for securing the provisioning data by just marking FATFS parition as encrypted.
105 lines
2.8 KiB
C
105 lines
2.8 KiB
C
// Copyright 2015-2018 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 <string.h>
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#include "diskio.h"
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#include "ffconf.h"
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#include "ff.h"
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#include "esp_log.h"
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#include "diskio_rawflash.h"
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static const char* TAG = "diskio_rawflash";
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const esp_partition_t* ff_raw_handles[FF_VOLUMES];
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DSTATUS ff_raw_initialize (BYTE pdrv)
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{
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return 0;
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}
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DSTATUS ff_raw_status (BYTE pdrv)
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{
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return 0;
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}
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DRESULT ff_raw_read (BYTE pdrv, BYTE *buff, DWORD sector, UINT count)
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{
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ESP_LOGV(TAG, "ff_raw_read - pdrv=%i, sector=%i, count=%in", (unsigned int)pdrv, (unsigned int)sector, (unsigned int)count);
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const esp_partition_t* part = ff_raw_handles[pdrv];
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assert(part);
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esp_err_t err = esp_partition_read(part, sector * SPI_FLASH_SEC_SIZE, buff, count * SPI_FLASH_SEC_SIZE);
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if (err != ESP_OK) {
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ESP_LOGE(TAG, "esp_partition_read failed (0x%x)", err);
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return RES_ERROR;
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}
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return RES_OK;
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}
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DRESULT ff_raw_write (BYTE pdrv, const BYTE *buff, DWORD sector, UINT count)
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{
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return RES_ERROR;
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}
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DRESULT ff_raw_ioctl (BYTE pdrv, BYTE cmd, void *buff)
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{
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const esp_partition_t* part = ff_raw_handles[pdrv];
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ESP_LOGV(TAG, "ff_raw_ioctl: cmd=%in", cmd);
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assert(part);
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switch (cmd) {
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case CTRL_SYNC:
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return RES_OK;
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case GET_SECTOR_COUNT:
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*((DWORD *) buff) = part->size / SPI_FLASH_SEC_SIZE;
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return RES_OK;
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case GET_SECTOR_SIZE:
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*((WORD *) buff) = SPI_FLASH_SEC_SIZE;
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return RES_OK;
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case GET_BLOCK_SIZE:
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return RES_ERROR;
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}
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return RES_ERROR;
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}
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esp_err_t ff_diskio_register_raw_partition(BYTE pdrv, const esp_partition_t* part_handle)
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{
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if (pdrv >= FF_VOLUMES) {
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return ESP_ERR_INVALID_ARG;
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}
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static const ff_diskio_impl_t raw_impl = {
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.init = &ff_raw_initialize,
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.status = &ff_raw_status,
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.read = &ff_raw_read,
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.write = &ff_raw_write,
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.ioctl = &ff_raw_ioctl
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};
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ff_diskio_register(pdrv, &raw_impl);
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ff_raw_handles[pdrv] = part_handle;
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return ESP_OK;
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}
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BYTE ff_diskio_get_pdrv_raw(const esp_partition_t* part_handle)
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{
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for (int i = 0; i < FF_VOLUMES; i++) {
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if (part_handle == ff_raw_handles[i]) {
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return i;
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}
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}
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return 0xff;
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}
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