circuitpython/ports/stm32/mboot/diskio.c

81 lines
2.4 KiB
C

/*
* This file is part of the MicroPython project, http://micropython.org/
*
* The MIT License (MIT)
*
* Copyright (c) 2019 Damien P. George
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include "py/mphal.h"
#include "lib/oofatfs/ff.h"
#include "lib/oofatfs/diskio.h"
#include "mboot.h"
#if MBOOT_FSLOAD
#if FF_MAX_SS == FF_MIN_SS
#define SECSIZE (FF_MIN_SS)
#else
#error Unsupported
#endif
DRESULT disk_read(void *pdrv, BYTE *buf, DWORD sector, UINT count) {
fsload_bdev_t *bdev = pdrv;
if (0 <= sector && sector < bdev->byte_len / 512) {
do_read(bdev->base_addr + sector * SECSIZE, count * SECSIZE, buf);
return RES_OK;
}
return RES_PARERR;
}
DRESULT disk_ioctl(void *pdrv, BYTE cmd, void *buf) {
fsload_bdev_t *bdev = pdrv;
switch (cmd) {
case CTRL_SYNC:
return RES_OK;
case GET_SECTOR_COUNT:
*((DWORD*)buf) = bdev->byte_len / SECSIZE;
return RES_OK;
case GET_SECTOR_SIZE:
*((WORD*)buf) = SECSIZE;
return RES_OK;
case GET_BLOCK_SIZE:
*((DWORD*)buf) = 1; // erase block size in units of sector size
return RES_OK;
case IOCTL_INIT:
case IOCTL_STATUS:
*((DSTATUS*)buf) = STA_PROTECT;
return RES_OK;
default:
return RES_PARERR;
}
}
#endif // MBOOT_FSLOAD