309 lines
9.8 KiB
C
309 lines
9.8 KiB
C
/*
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* This file is part of the Micro Python project, http://micropython.org/
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*
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* Original template for this file comes from:
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* Low level disk I/O module skeleton for FatFs, (C)ChaN, 2013
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*
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* The MIT License (MIT)
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*
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* Copyright (c) 2013, 2014 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/mpconfig.h"
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#if MICROPY_VFS || MICROPY_FSUSERMOUNT
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#include <stdint.h>
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#include <stdio.h>
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#include "py/mphal.h"
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#include "py/runtime.h"
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#if MICROPY_FATFS_OO
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#include "lib/oofatfs/ff.h"
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#include "lib/oofatfs/diskio.h"
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#else
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#include "lib/fatfs/ff.h" /* FatFs lower layer API */
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#include "lib/fatfs/diskio.h" /* FatFs lower layer API */
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#endif
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#include "extmod/fsusermount.h"
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#if _MAX_SS == _MIN_SS
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#define SECSIZE(fs) (_MIN_SS)
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#else
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#define SECSIZE(fs) ((fs)->ssize)
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#endif
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#if MICROPY_FATFS_OO
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typedef void *bdev_t;
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STATIC fs_user_mount_t *disk_get_device(void *bdev) {
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return (fs_user_mount_t*)bdev;
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}
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#else
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typedef BYTE bdev_t;
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STATIC fs_user_mount_t *disk_get_device(uint id) {
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if (id < MP_ARRAY_SIZE(MP_STATE_PORT(fs_user_mount))) {
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return MP_STATE_PORT(fs_user_mount)[id];
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} else {
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return NULL;
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}
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}
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#endif
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/*-----------------------------------------------------------------------*/
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/* Initialize a Drive */
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/*-----------------------------------------------------------------------*/
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#if MICROPY_FATFS_OO
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STATIC
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#endif
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DSTATUS disk_initialize (
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bdev_t pdrv /* Physical drive nmuber (0..) */
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)
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{
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fs_user_mount_t *vfs = disk_get_device(pdrv);
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if (vfs == NULL) {
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return STA_NOINIT;
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}
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if (vfs->flags & FSUSER_HAVE_IOCTL) {
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// new protocol with ioctl; call ioctl(INIT, 0)
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vfs->u.ioctl[2] = MP_OBJ_NEW_SMALL_INT(BP_IOCTL_INIT);
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vfs->u.ioctl[3] = MP_OBJ_NEW_SMALL_INT(0); // unused
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mp_obj_t ret = mp_call_method_n_kw(2, 0, vfs->u.ioctl);
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if (ret != mp_const_none && MP_OBJ_SMALL_INT_VALUE(ret) != 0) {
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// error initialising
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return STA_NOINIT;
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}
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}
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if (vfs->writeblocks[0] == MP_OBJ_NULL) {
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return STA_PROTECT;
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} else {
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return 0;
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}
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}
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/*-----------------------------------------------------------------------*/
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/* Get Disk Status */
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/*-----------------------------------------------------------------------*/
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#if MICROPY_FATFS_OO
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STATIC
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#endif
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DSTATUS disk_status (
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bdev_t pdrv /* Physical drive nmuber (0..) */
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)
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{
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fs_user_mount_t *vfs = disk_get_device(pdrv);
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if (vfs == NULL) {
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return STA_NOINIT;
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}
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if (vfs->writeblocks[0] == MP_OBJ_NULL) {
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return STA_PROTECT;
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} else {
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return 0;
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}
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}
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/*-----------------------------------------------------------------------*/
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/* Read Sector(s) */
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/*-----------------------------------------------------------------------*/
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DRESULT disk_read (
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bdev_t pdrv, /* Physical drive nmuber (0..) */
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BYTE *buff, /* Data buffer to store read data */
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DWORD sector, /* Sector address (LBA) */
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UINT count /* Number of sectors to read (1..128) */
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)
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{
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fs_user_mount_t *vfs = disk_get_device(pdrv);
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if (vfs == NULL) {
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return RES_PARERR;
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}
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if (vfs->flags & FSUSER_NATIVE) {
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mp_uint_t (*f)(uint8_t*, uint32_t, uint32_t) = (void*)(uintptr_t)vfs->readblocks[2];
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if (f(buff, sector, count) != 0) {
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return RES_ERROR;
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}
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} else {
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vfs->readblocks[2] = MP_OBJ_NEW_SMALL_INT(sector);
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vfs->readblocks[3] = mp_obj_new_bytearray_by_ref(count * SECSIZE(&vfs->fatfs), buff);
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mp_call_method_n_kw(2, 0, vfs->readblocks);
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// TODO handle error return
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}
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return RES_OK;
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}
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/*-----------------------------------------------------------------------*/
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/* Write Sector(s) */
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/*-----------------------------------------------------------------------*/
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#if MICROPY_FATFS_OO || _USE_WRITE
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DRESULT disk_write (
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bdev_t pdrv, /* Physical drive nmuber (0..) */
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const BYTE *buff, /* Data to be written */
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DWORD sector, /* Sector address (LBA) */
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UINT count /* Number of sectors to write (1..128) */
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)
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{
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fs_user_mount_t *vfs = disk_get_device(pdrv);
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if (vfs == NULL) {
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return RES_PARERR;
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}
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if (vfs->writeblocks[0] == MP_OBJ_NULL) {
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// read-only block device
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return RES_WRPRT;
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}
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if (vfs->flags & FSUSER_NATIVE) {
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mp_uint_t (*f)(const uint8_t*, uint32_t, uint32_t) = (void*)(uintptr_t)vfs->writeblocks[2];
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if (f(buff, sector, count) != 0) {
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return RES_ERROR;
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}
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} else {
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vfs->writeblocks[2] = MP_OBJ_NEW_SMALL_INT(sector);
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vfs->writeblocks[3] = mp_obj_new_bytearray_by_ref(count * SECSIZE(&vfs->fatfs), (void*)buff);
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mp_call_method_n_kw(2, 0, vfs->writeblocks);
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// TODO handle error return
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}
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return RES_OK;
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}
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#endif
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/*-----------------------------------------------------------------------*/
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/* Miscellaneous Functions */
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/*-----------------------------------------------------------------------*/
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#if MICROPY_FATFS_OO || _USE_IOCTL
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DRESULT disk_ioctl (
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bdev_t pdrv, /* Physical drive nmuber (0..) */
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BYTE cmd, /* Control code */
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void *buff /* Buffer to send/receive control data */
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)
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{
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fs_user_mount_t *vfs = disk_get_device(pdrv);
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if (vfs == NULL) {
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return RES_PARERR;
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}
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if (vfs->flags & FSUSER_HAVE_IOCTL) {
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// new protocol with ioctl
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switch (cmd) {
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case CTRL_SYNC:
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vfs->u.ioctl[2] = MP_OBJ_NEW_SMALL_INT(BP_IOCTL_SYNC);
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vfs->u.ioctl[3] = MP_OBJ_NEW_SMALL_INT(0); // unused
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mp_call_method_n_kw(2, 0, vfs->u.ioctl);
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return RES_OK;
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case GET_SECTOR_COUNT: {
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vfs->u.ioctl[2] = MP_OBJ_NEW_SMALL_INT(BP_IOCTL_SEC_COUNT);
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vfs->u.ioctl[3] = MP_OBJ_NEW_SMALL_INT(0); // unused
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mp_obj_t ret = mp_call_method_n_kw(2, 0, vfs->u.ioctl);
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*((DWORD*)buff) = mp_obj_get_int(ret);
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return RES_OK;
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}
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case GET_SECTOR_SIZE: {
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vfs->u.ioctl[2] = MP_OBJ_NEW_SMALL_INT(BP_IOCTL_SEC_SIZE);
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vfs->u.ioctl[3] = MP_OBJ_NEW_SMALL_INT(0); // unused
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mp_obj_t ret = mp_call_method_n_kw(2, 0, vfs->u.ioctl);
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if (ret == mp_const_none) {
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// Default sector size
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*((WORD*)buff) = 512;
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} else {
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*((WORD*)buff) = mp_obj_get_int(ret);
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}
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#if MICROPY_FATFS_OO && _MAX_SS != _MIN_SS
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// need to store ssize because we use it in disk_read/disk_write
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vfs->fatfs.ssize = *((WORD*)buff);
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#endif
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return RES_OK;
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}
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case GET_BLOCK_SIZE:
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*((DWORD*)buff) = 1; // erase block size in units of sector size
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return RES_OK;
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#if MICROPY_FATFS_OO
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case IOCTL_INIT:
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*((DSTATUS*)buff) = disk_initialize(pdrv);
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return RES_OK;
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case IOCTL_STATUS:
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*((DSTATUS*)buff) = disk_status(pdrv);
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return RES_OK;
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#endif
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default:
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return RES_PARERR;
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}
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} else {
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// old protocol with sync and count
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switch (cmd) {
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case CTRL_SYNC:
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if (vfs->u.old.sync[0] != MP_OBJ_NULL) {
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mp_call_method_n_kw(0, 0, vfs->u.old.sync);
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}
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return RES_OK;
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case GET_SECTOR_COUNT: {
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mp_obj_t ret = mp_call_method_n_kw(0, 0, vfs->u.old.count);
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*((DWORD*)buff) = mp_obj_get_int(ret);
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return RES_OK;
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}
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case GET_SECTOR_SIZE:
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*((WORD*)buff) = 512; // old protocol had fixed sector size
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#if MICROPY_FATFS_OO && _MAX_SS != _MIN_SS
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// need to store ssize because we use it in disk_read/disk_write
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vfs->fatfs.ssize = 512;
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#endif
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return RES_OK;
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case GET_BLOCK_SIZE:
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*((DWORD*)buff) = 1; // erase block size in units of sector size
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return RES_OK;
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#if MICROPY_FATFS_OO
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case IOCTL_INIT:
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*((DSTATUS*)buff) = disk_initialize(pdrv);
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return RES_OK;
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case IOCTL_STATUS:
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*((DSTATUS*)buff) = disk_status(pdrv);
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return RES_OK;
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#endif
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default:
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return RES_PARERR;
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}
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}
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}
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#endif
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#endif // MICROPY_VFS || MICROPY_FSUSERMOUNT
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