| /* |
| * Copyright (c) 2016 Intel Corporation. |
| * |
| * 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 <string.h> |
| #include <stdint.h> |
| #include <misc/__assert.h> |
| #include <diskio.h> |
| #include <ff.h> |
| |
| static uint8_t file_buff[CONFIG_FS_VOLUME_SIZE]; |
| |
| static void *lba_to_address(uint32_t lba) |
| { |
| __ASSERT(((lba * _MIN_SS) < CONFIG_FS_VOLUME_SIZE), "FS bound error"); |
| return &file_buff[(lba * _MIN_SS)]; |
| } |
| |
| DSTATUS fat_disk_status(void) |
| { |
| return RES_OK; |
| } |
| |
| DSTATUS fat_disk_initialize(void) |
| { |
| return RES_OK; |
| } |
| |
| DRESULT fat_disk_read(void *buff, uint32_t sector, uint32_t count) |
| { |
| memcpy(buff, lba_to_address(sector), count * _MIN_SS); |
| |
| return RES_OK; |
| } |
| |
| DRESULT fat_disk_write(void *buff, uint32_t sector, uint32_t count) |
| { |
| memcpy(lba_to_address(sector), buff, count * _MIN_SS); |
| |
| return RES_OK; |
| } |
| |
| DRESULT fat_disk_ioctl(uint8_t cmd, void *buff) |
| { |
| switch (cmd) { |
| case CTRL_SYNC: |
| return RES_OK; |
| case GET_SECTOR_COUNT: |
| *(uint32_t *) buff = CONFIG_FS_VOLUME_SIZE / _MIN_SS; |
| return RES_OK; |
| case GET_BLOCK_SIZE: |
| *(uint32_t *) buff = CONFIG_FS_BLOCK_SIZE / _MIN_SS; |
| return RES_OK; |
| case CTRL_TRIM: |
| break; |
| } |
| |
| return RES_PARERR; |
| } |