hekate/nyx/nyx_gui/libs/fatfs/diskio.c

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/*-----------------------------------------------------------------------*/
/* Low level disk I/O module skeleton for FatFs (C)ChaN, 2016 */
/*-----------------------------------------------------------------------*/
/* If a working storage control module is available, it should be */
/* attached to the FatFs via a glue function rather than modifying it. */
/* This is an example of glue functions to attach various exsisting */
/* storage control modules to the FatFs module with a defined API. */
/*-----------------------------------------------------------------------*/
#include <string.h>
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#include <bdk.h>
#include <libs/fatfs/diskio.h> /* FatFs lower layer API */
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#include "../../storage/nx_emmc_bis.h"
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static u32 sd_rsvd_sectors = 0;
static u32 ramdisk_sectors = 0;
static u32 emummc_sectors = 0;
/*-----------------------------------------------------------------------*/
/* Get Drive Status */
/*-----------------------------------------------------------------------*/
DSTATUS disk_status (
BYTE pdrv /* Physical drive nmuber to identify the drive */
)
{
return 0;
}
/*-----------------------------------------------------------------------*/
/* Inidialize a Drive */
/*-----------------------------------------------------------------------*/
DSTATUS disk_initialize (
BYTE pdrv /* Physical drive nmuber to identify the drive */
)
{
return 0;
}
/*-----------------------------------------------------------------------*/
/* Read Sector(s) */
/*-----------------------------------------------------------------------*/
DRESULT disk_read (
BYTE pdrv, /* Physical drive nmuber to identify the drive */
BYTE *buff, /* Data buffer to store read data */
DWORD sector, /* Start sector in LBA */
UINT count /* Number of sectors to read */
)
{
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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);
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case DRIVE_EMMC:
return sdmmc_storage_read(&emmc_storage, sector, count, (void *)buff) ? RES_OK : RES_ERROR;
case DRIVE_BIS:
case DRIVE_EMU:
return nx_emmc_bis_read(sector, count, (void *)buff) ? RES_OK : RES_ERROR;
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}
return RES_ERROR;
}
/*-----------------------------------------------------------------------*/
/* Write Sector(s) */
/*-----------------------------------------------------------------------*/
DRESULT disk_write (
BYTE pdrv, /* Physical drive nmuber to identify the drive */
const BYTE *buff, /* Data to be written */
DWORD sector, /* Start sector in LBA */
UINT count /* Number of sectors to write */
)
{
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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);
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case DRIVE_EMMC:
case DRIVE_BIS:
return RES_WRPRT;
case DRIVE_EMU:
return nx_emmc_bis_write(sector, count, (void *)buff) ? RES_OK : RES_ERROR;
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}
return RES_ERROR;
}
/*-----------------------------------------------------------------------*/
/* Miscellaneous Functions */
/*-----------------------------------------------------------------------*/
DRESULT disk_ioctl (
BYTE pdrv, /* Physical drive nmuber (0..) */
BYTE cmd, /* Control code */
void *buff /* Buffer to send/receive control data */
)
{
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DWORD *buf = (DWORD *)buff;
if (pdrv == DRIVE_SD)
{
switch (cmd)
{
case GET_SECTOR_COUNT:
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*buf = sd_storage.sec_cnt - sd_rsvd_sectors;
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break;
case GET_BLOCK_SIZE:
*buf = 32768; // Align to 16MB.
break;
}
}
else if (pdrv == DRIVE_RAM)
{
switch (cmd)
{
case GET_SECTOR_COUNT:
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*buf = ramdisk_sectors;
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break;
case GET_BLOCK_SIZE:
*buf = 2048; // Align to 1MB.
break;
}
}
else if (pdrv == DRIVE_EMU)
{
switch (cmd)
{
case GET_SECTOR_COUNT:
*buf = emummc_sectors;
break;
case GET_BLOCK_SIZE:
*buf = 32768; // Align to 16MB.
break;
}
}
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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;
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if (cmd == SET_SECTOR_COUNT)
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{
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switch (pdrv)
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{
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case DRIVE_SD:
sd_rsvd_sectors = *buf;
break;
case DRIVE_RAM:
ramdisk_sectors = *buf;
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break;
case DRIVE_EMU:
emummc_sectors = *buf;
break;
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}
}
return RES_OK;
}