145 lines
4.0 KiB
C
145 lines
4.0 KiB
C
/*-----------------------------------------------------------------------*/
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/* Low level disk I/O module skeleton for FatFs (C)ChaN, 2007 */
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/*-----------------------------------------------------------------------*/
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/* This is a stub disk I/O module that acts as front end of the existing */
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/* disk I/O modules and attach it to FatFs module with common interface. */
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/*-----------------------------------------------------------------------*/
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#include "hal.h"
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#include "ffconf.h"
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#include "diskio.h"
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#include "usbh.h"
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#include "usbh/dev/msd.h"
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/*-----------------------------------------------------------------------*/
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/* Correspondence between physical drive number and physical drive. */
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#define MSDLUN0 0
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/*-----------------------------------------------------------------------*/
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/* Inidialize a Drive */
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DSTATUS disk_initialize (
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BYTE pdrv /* Physical drive nmuber (0..) */
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)
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{
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DSTATUS stat;
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switch (pdrv) {
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case MSDLUN0:
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stat = 0;
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/* It is initialized externally, just reads the status.*/
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if (blkGetDriverState(&MSBLKD[0]) != BLK_READY)
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stat |= STA_NOINIT;
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return stat;
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}
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return STA_NOINIT;
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}
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/*-----------------------------------------------------------------------*/
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/* Return Disk Status */
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DSTATUS disk_status (
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BYTE pdrv /* Physical drive nmuber (0..) */
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)
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{
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DSTATUS stat;
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switch (pdrv) {
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case MSDLUN0:
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stat = 0;
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/* It is initialized externally, just reads the status.*/
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if (blkGetDriverState(&MSBLKD[0]) != BLK_READY)
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stat |= STA_NOINIT;
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return stat;
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}
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return STA_NOINIT;
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}
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/*-----------------------------------------------------------------------*/
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/* Read Sector(s) */
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DRESULT disk_read (
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BYTE 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..255) */
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)
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{
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switch (pdrv) {
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case MSDLUN0:
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/* It is initialized externally, just reads the status.*/
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if (blkGetDriverState(&MSBLKD[0]) != BLK_READY)
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return RES_NOTRDY;
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if (usbhmsdLUNRead(&MSBLKD[0], sector, buff, count))
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return RES_ERROR;
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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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/*-----------------------------------------------------------------------*/
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/* Write Sector(s) */
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#if _USE_WRITE
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DRESULT disk_write (
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BYTE 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..255) */
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)
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{
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switch (pdrv) {
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case MSDLUN0:
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/* It is initialized externally, just reads the status.*/
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if (blkGetDriverState(&MSBLKD[0]) != BLK_READY)
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return RES_NOTRDY;
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if (usbhmsdLUNWrite(&MSBLKD[0], sector, buff, count))
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return RES_ERROR;
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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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#endif /* _USE_WRITE */
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/*-----------------------------------------------------------------------*/
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/* Miscellaneous Functions */
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#if _USE_IOCTL
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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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switch (pdrv) {
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case MSDLUN0:
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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 *)buff) = MSBLKD[0].info.blk_num;
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return RES_OK;
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case GET_SECTOR_SIZE:
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*((WORD *)buff) = MSBLKD[0].info.blk_size;
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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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return RES_PARERR;
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}
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#endif /* _USE_IOCTL */
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DWORD get_fattime(void) {
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return ((uint32_t)0 | (1 << 16)) | (1 << 21); /* wrong but valid time */
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}
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