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fatfs: Add Ramdisk support

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This commit is contained in:
CTCaer
2020-04-30 15:03:25 +03:00
parent c8d6da5a23
commit a2bb576c03
5 changed files with 86 additions and 11 deletions
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70
nyx/nyx_gui/libs/fatfs/diskio.c
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@@ -12,6 +12,7 @@
#include "diskio.h" /* FatFs lower layer API */
#include "../../../../common/memory_map.h"
#include "../../storage/nx_sd.h"
#include "../../storage/ramdisk.h"
#include "../../storage/sdmmc.h"
/*-----------------------------------------------------------------------*/
@@ -44,7 +45,15 @@ DRESULT disk_read (
UINT count /* Number of sectors to read */
)
{
return sdmmc_storage_read(&sd_storage, sector, count, buff) ? RES_OK : RES_ERROR;
switch (pdrv)
{
case DRIVE_SD:
return sdmmc_storage_read(&sd_storage, sector, count, (void *)buff) ? RES_OK : RES_ERROR;
case DRIVE_RAM:
return ram_disk_read(sector, count, (void *)buff);
}
return RES_ERROR;
}
/*-----------------------------------------------------------------------*/
@@ -57,17 +66,74 @@ DRESULT disk_write (
UINT count /* Number of sectors to write */
)
{
return sdmmc_storage_write(&sd_storage, sector, count, (void *)buff) ? RES_OK : RES_ERROR;
switch (pdrv)
{
case DRIVE_SD:
return sdmmc_storage_write(&sd_storage, sector, count, (void *)buff) ? RES_OK : RES_ERROR;
case DRIVE_RAM:
return ram_disk_write(sector, count, (void *)buff);
}
return RES_ERROR;
}
/*-----------------------------------------------------------------------*/
/* Miscellaneous Functions */
/*-----------------------------------------------------------------------*/
static u32 part_rsvd_size = 0;
DRESULT disk_ioctl (
BYTE pdrv, /* Physical drive nmuber (0..) */
BYTE cmd, /* Control code */
void *buff /* Buffer to send/receive control data */
)
{
DWORD *buf = (DWORD *)buff;
if (pdrv == DRIVE_SD)
{
switch (cmd)
{
case GET_SECTOR_COUNT:
*buf = sd_storage.sec_cnt - part_rsvd_size;
break;
case GET_BLOCK_SIZE:
*buf = 32768; // Align to 16MB.
break;
}
}
else if (pdrv == DRIVE_RAM)
{
switch (cmd)
{
case GET_SECTOR_COUNT:
*buf = RAM_DISK_SZ >> 9; // 1GB.
break;
case GET_BLOCK_SIZE:
*buf = 2048; // Align to 1MB.
break;
}
}
return RES_OK;
}
DRESULT disk_set_info (
BYTE pdrv, /* Physical drive nmuber (0..) */
BYTE cmd, /* Control code */
void *buff /* Buffer to send/receive control data */
)
{
DWORD *buf = (DWORD *)buff;
if (pdrv == DRIVE_SD)
{
switch (cmd)
{
case SET_SECTOR_COUNT:
part_rsvd_size = *buf;
break;
}
}
return RES_OK;
}