124 lines
3.6 KiB
C
124 lines
3.6 KiB
C
/*
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* This file is part of the MicroPython project, http://micropython.org/
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*
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* The MIT License (MIT)
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*
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* Copyright (c) 2019-2020 Damien P. George
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include "py/mphal.h"
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#include "lib/oofatfs/ff.h"
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#include "lib/oofatfs/diskio.h"
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#include "mboot.h"
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#include "vfs.h"
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#if MBOOT_FSLOAD && MBOOT_VFS_FAT
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#if FF_MAX_SS == FF_MIN_SS
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#define SECSIZE (FF_MIN_SS)
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#else
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#error Unsupported
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#endif
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DRESULT disk_read(void *pdrv, BYTE *buf, DWORD sector, UINT count) {
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vfs_fat_context_t *ctx = pdrv;
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if (0 <= sector && sector < ctx->bdev_num_blocks) {
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mboot_addr_t addr = ctx->bdev_base_addr + (mboot_addr_t)sector * (mboot_addr_t)SECSIZE;
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hw_read(addr, count * SECSIZE, buf);
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return RES_OK;
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}
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return RES_PARERR;
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}
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DRESULT disk_ioctl(void *pdrv, BYTE cmd, void *buf) {
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vfs_fat_context_t *ctx = pdrv;
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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 *)buf) = ctx->bdev_num_blocks;
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return RES_OK;
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case GET_SECTOR_SIZE:
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*((WORD *)buf) = SECSIZE;
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return RES_OK;
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case GET_BLOCK_SIZE:
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*((DWORD *)buf) = 1; // erase block size in units of sector size
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return RES_OK;
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case IOCTL_INIT:
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case IOCTL_STATUS:
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*((DSTATUS *)buf) = STA_PROTECT;
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return RES_OK;
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default:
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return RES_PARERR;
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}
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}
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int vfs_fat_mount(vfs_fat_context_t *ctx, mboot_addr_t base_addr, mboot_addr_t byte_len) {
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ctx->bdev_base_addr = base_addr;
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ctx->bdev_num_blocks = byte_len / SECSIZE;
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ctx->fatfs.drv = ctx;
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FRESULT res = f_mount(&ctx->fatfs);
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if (res != FR_OK) {
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return -MBOOT_ERRNO_VFS_FAT_MOUNT_FAILED;
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}
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return 0;
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}
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static int vfs_fat_stream_open(void *stream_in, const char *fname) {
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vfs_fat_context_t *stream = stream_in;
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FRESULT res = f_open(&stream->fatfs, &stream->fp, fname, FA_READ);
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if (res != FR_OK) {
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return -MBOOT_ERRNO_VFS_FAT_OPEN_FAILED;
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}
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return 0;
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}
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static void vfs_fat_stream_close(void *stream_in) {
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vfs_fat_context_t *stream = stream_in;
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f_close(&stream->fp);
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}
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static int vfs_fat_stream_read(void *stream_in, uint8_t *buf, size_t len) {
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vfs_fat_context_t *stream = stream_in;
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UINT n;
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FRESULT res = f_read(&stream->fp, buf, len, &n);
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if (res != FR_OK) {
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return -1;
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}
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return n;
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}
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const stream_methods_t vfs_fat_stream_methods = {
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vfs_fat_stream_open,
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vfs_fat_stream_close,
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vfs_fat_stream_read,
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};
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#endif // MBOOT_FSLOAD && MBOOT_VFS_FAT
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