207 lines
6.2 KiB
C
207 lines
6.2 KiB
C
/*
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* Copyright (c) 2015-2018, Texas Instruments Incorporated
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* * Neither the name of Texas Instruments Incorporated nor the names of
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* its contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
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* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
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* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* ======== diskio.c ========
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* Generic definition of all disk APIs. This should be shared amongst all media
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*
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*/
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#include <stddef.h>
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#include <stdint.h>
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#include "ffconf.h"
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#include "diskio.h"
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static diskio_fxns drive_fxn_table[FF_VOLUMES] = {
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{NULL, NULL, NULL, NULL, NULL},
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{NULL, NULL, NULL, NULL, NULL},
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{NULL, NULL, NULL, NULL, NULL},
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{NULL, NULL, NULL, NULL, NULL}
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};
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extern int32_t fatfs_getFatTime(void);
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/*
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* ======== disk_register ========
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*/
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DRESULT disk_register(
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BYTE drive,
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DSTATUS (*d_init) (BYTE drive),
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DSTATUS (*d_status)(BYTE drive),
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DRESULT (*d_read) (BYTE drive, BYTE *buf, DWORD sector, UINT num),
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DRESULT (*d_write) (BYTE drive, const BYTE *buf, DWORD sector, UINT num),
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DRESULT (*d_ioctl) (BYTE drive, BYTE cmd, void * buf))
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{
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if (drive >= FF_VOLUMES) {
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return RES_PARERR;
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}
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drive_fxn_table[drive].d_init = d_init;
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drive_fxn_table[drive].d_status = d_status;
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drive_fxn_table[drive].d_read = d_read;
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drive_fxn_table[drive].d_write = d_write;
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drive_fxn_table[drive].d_ioctl = d_ioctl;
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return RES_OK;
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}
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/*
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* ======== disk_unregister ========
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*/
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DRESULT disk_unregister(BYTE drive)
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{
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if (drive >= FF_VOLUMES) {
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return RES_PARERR;
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}
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drive_fxn_table[drive].d_init = NULL;
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drive_fxn_table[drive].d_status = NULL;
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drive_fxn_table[drive].d_read = NULL;
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drive_fxn_table[drive].d_write = NULL;
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drive_fxn_table[drive].d_ioctl = NULL;
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return RES_OK;
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}
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/*-----------------------------------------------------------------------*/
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/* Get Drive Status */
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/*-----------------------------------------------------------------------*/
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DSTATUS disk_status (
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BYTE pdrv /* Physical drive nmuber to identify the drive */
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)
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{
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if (drive_fxn_table[pdrv].d_status == NULL) {
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return RES_PARERR;
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}
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else {
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/* call registered status function */
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return ((*(drive_fxn_table[pdrv].d_status)) (pdrv));
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}
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}
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/*-----------------------------------------------------------------------*/
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/* Inidialize a Drive */
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/*-----------------------------------------------------------------------*/
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DSTATUS disk_initialize (
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BYTE pdrv /* Physical drive nmuber to identify the drive */
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)
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{
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if (drive_fxn_table[pdrv].d_init == NULL) {
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return RES_PARERR;
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}
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else {
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/* call registered init function */
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return ((*(drive_fxn_table[pdrv].d_init)) (pdrv));
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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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BYTE pdrv, /* Physical drive nmuber to identify the drive */
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BYTE *buff, /* Data buffer to store read data */
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DWORD sector, /* Start sector in LBA */
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UINT count /* Number of sectors to read */
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)
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{
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if (drive_fxn_table[pdrv].d_read == NULL) {
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return RES_PARERR;
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}
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else {
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/* call registered read function */
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return ((*(drive_fxn_table[pdrv].d_read)) (pdrv, buff, sector, count));
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}
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}
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/*-----------------------------------------------------------------------*/
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/* Write Sector(s) */
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/*-----------------------------------------------------------------------*/
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DRESULT disk_write (
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BYTE pdrv, /* Physical drive nmuber to identify the drive */
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const BYTE *buff, /* Data to be written */
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DWORD sector, /* Start sector in LBA */
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UINT count /* Number of sectors to write */
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)
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{
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if (drive_fxn_table[pdrv].d_write == NULL) {
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return RES_PARERR;
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}
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else {
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/* call registered write function */
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return ((*(drive_fxn_table[pdrv].d_write)) (pdrv, buff, sector, count));
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}
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}
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/*-----------------------------------------------------------------------*/
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/* Miscellaneous Functions */
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/*-----------------------------------------------------------------------*/
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DRESULT disk_ioctl (
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BYTE 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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if (drive_fxn_table[pdrv].d_ioctl == NULL) {
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return RES_PARERR;
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}
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else {
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/* call registered write function */
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return ((*(drive_fxn_table[pdrv].d_ioctl)) (pdrv, cmd, buff));
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}
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}
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/*
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* ======== get_fattime ========
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*/
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DWORD get_fattime(void)
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{
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/* call TI dummy implementation or user defined hook function */
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return (fatfs_getFatTime());
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}
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