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/*
* This file is part of the MicroPython project, http://micropython.org/
*
* Original template for this file comes from:
* Low level disk I/O module skeleton for FatFs, (C)ChaN, 2013
*
* The MIT License (MIT)
*
* Copyright (c) 2013, 2014 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/mpconfig.h"
#if MICROPY_VFS && MICROPY_VFS_FAT
#include <stdint.h>
#include <stdio.h>
#include "py/mphal.h"
#include "py/runtime.h"
#include "py/binary.h"
#include "py/objarray.h"
#include "py/mperrno.h"
#include "lib/oofatfs/ff.h"
#include "lib/oofatfs/diskio.h"
#include "extmod/vfs_fat.h"
typedef void *bdev_t;
STATIC fs_user_mount_t *disk_get_device(void *bdev) {
return (fs_user_mount_t *)bdev;
}
/*-----------------------------------------------------------------------*/
/* Read Sector(s) */
/*-----------------------------------------------------------------------*/
DRESULT disk_read(
bdev_t pdrv, /* Physical drive nmuber (0..) */
BYTE *buff, /* Data buffer to store read data */
DWORD sector, /* Sector address (LBA) */
UINT count /* Number of sectors to read (1..128) */
) {
fs_user_mount_t *vfs = disk_get_device(pdrv);
if (vfs == NULL) {
return RES_PARERR;
}
int ret = mp_vfs_blockdev_read(&vfs->blockdev, sector, count, buff);
return ret == 0 ? RES_OK : RES_ERROR;
}
/*-----------------------------------------------------------------------*/
/* Write Sector(s) */
/*-----------------------------------------------------------------------*/
DRESULT disk_write(
bdev_t pdrv, /* Physical drive nmuber (0..) */
const BYTE *buff, /* Data to be written */
DWORD sector, /* Sector address (LBA) */
UINT count /* Number of sectors to write (1..128) */
) {
fs_user_mount_t *vfs = disk_get_device(pdrv);
if (vfs == NULL) {
return RES_PARERR;
}
int ret = mp_vfs_blockdev_write(&vfs->blockdev, sector, count, buff);
if (ret == -MP_EROFS) {
// read-only block device
return RES_WRPRT;
}
return ret == 0 ? RES_OK : RES_ERROR;
}
/*-----------------------------------------------------------------------*/
/* Miscellaneous Functions */
/*-----------------------------------------------------------------------*/
DRESULT disk_ioctl(
bdev_t pdrv, /* Physical drive nmuber (0..) */
BYTE cmd, /* Control code */
void *buff /* Buffer to send/receive control data */
) {
fs_user_mount_t *vfs = disk_get_device(pdrv);
if (vfs == NULL) {
return RES_PARERR;
}
// First part: call the relevant method of the underlying block device
static const uint8_t op_map[8] = {
[CTRL_SYNC] = MP_BLOCKDEV_IOCTL_SYNC,
[GET_SECTOR_COUNT] = MP_BLOCKDEV_IOCTL_BLOCK_COUNT,
[GET_SECTOR_SIZE] = MP_BLOCKDEV_IOCTL_BLOCK_SIZE,
[IOCTL_INIT] = MP_BLOCKDEV_IOCTL_INIT,
};
uint8_t bp_op = op_map[cmd & 7];
mp_obj_t ret = mp_const_none;
if (bp_op != 0) {
ret = mp_vfs_blockdev_ioctl(&vfs->blockdev, bp_op, 0);
}
// Second part: convert the result for return
switch (cmd) {
case CTRL_SYNC:
return RES_OK;
case GET_SECTOR_COUNT: {
*((DWORD *)buff) = mp_obj_get_int(ret);
return RES_OK;
}
case GET_SECTOR_SIZE: {
if (ret == mp_const_none) {
// Default sector size
*((WORD *)buff) = 512;
} else {
*((WORD *)buff) = mp_obj_get_int(ret);
}
// need to store ssize because we use it in disk_read/disk_write
vfs->blockdev.block_size = *((WORD *)buff);
return RES_OK;
}
case GET_BLOCK_SIZE:
*((DWORD *)buff) = 1; // erase block size in units of sector size
return RES_OK;
case IOCTL_INIT:
case IOCTL_STATUS: {
DSTATUS stat;
if (ret != mp_const_none && MP_OBJ_SMALL_INT_VALUE(ret) != 0) {
// error initialising
stat = STA_NOINIT;
} else if (vfs->blockdev.writeblocks[0] == MP_OBJ_NULL) {
stat = STA_PROTECT;
} else {
stat = 0;
}
*((DSTATUS *)buff) = stat;
return RES_OK;
}
default:
return RES_PARERR;
}
}
#endif // MICROPY_VFS && MICROPY_VFS_FAT
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