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