hekate/bootloader/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>
#include "../../../common/memory_map.h"
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#include "diskio.h" /* FatFs lower layer API */
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#include "../../storage/sdmmc.h"
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extern sdmmc_storage_t sd_storage;
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/*-----------------------------------------------------------------------*/
/* Get Drive Status */
/*-----------------------------------------------------------------------*/
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DSTATUS disk_status (
BYTE pdrv /* Physical drive nmuber to identify the drive */
)
{
return 0;
}
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/*-----------------------------------------------------------------------*/
/* Inidialize a Drive */
/*-----------------------------------------------------------------------*/
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DSTATUS disk_initialize (
BYTE pdrv /* Physical drive nmuber to identify the drive */
)
{
return 0;
}
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/*-----------------------------------------------------------------------*/
/* Read Sector(s) */
/*-----------------------------------------------------------------------*/
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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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// Ensure that buffer resides in DRAM and it's DMA aligned.
if (((u32)buff >= DRAM_START) && !((u32)buff % 8))
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return sdmmc_storage_read(&sd_storage, sector, count, buff) ? RES_OK : RES_ERROR;
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u8 *buf = (u8 *)SDMMC_UPPER_BUFFER;
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if (sdmmc_storage_read(&sd_storage, sector, count, buf))
{
memcpy(buff, buf, 512 * count);
return RES_OK;
}
return RES_ERROR;
}
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/*-----------------------------------------------------------------------*/
/* Write Sector(s) */
/*-----------------------------------------------------------------------*/
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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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// Ensure that buffer resides in DRAM and it's DMA aligned.
if (((u32)buff >= DRAM_START) && !((u32)buff % 8))
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return sdmmc_storage_write(&sd_storage, sector, count, (void *)buff) ? RES_OK : RES_ERROR;
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u8 *buf = (u8 *)SDMMC_UPPER_BUFFER;
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memcpy(buf, buff, 512 * count);
if (sdmmc_storage_write(&sd_storage, sector, count, buf))
return RES_OK;
return RES_ERROR;
}
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/*-----------------------------------------------------------------------*/
/* Miscellaneous Functions */
/*-----------------------------------------------------------------------*/
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DRESULT disk_ioctl (
BYTE pdrv, /* Physical drive nmuber (0..) */
BYTE cmd, /* Control code */
void *buff /* Buffer to send/receive control data */
)
{
return RES_OK;
}