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https://github.com/CTCaer/hekate.git
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91 lines
3.5 KiB
C
91 lines
3.5 KiB
C
/*-----------------------------------------------------------------------*/
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/* Low level disk I/O module skeleton for FatFs (C)ChaN, 2016 */
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/*-----------------------------------------------------------------------*/
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/* If a working storage control module is available, it should be */
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/* attached to the FatFs via a glue function rather than modifying it. */
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/* This is an example of glue functions to attach various exsisting */
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/* storage control modules to the FatFs module with a defined API. */
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/*-----------------------------------------------------------------------*/
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#include <string.h>
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#include "diskio.h" /* FatFs lower layer API */
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#include "../../storage/sdmmc.h"
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#define SDMMC_UPPER_BUFFER 0xB8000000
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#define DRAM_START 0x80000000
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extern sdmmc_storage_t sd_storage;
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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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return 0;
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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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return 0;
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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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// Ensure that buffer resides in DRAM and it's DMA aligned.
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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))
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{
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memcpy(buff, buf, 512 * count);
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return RES_OK;
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}
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return RES_ERROR;
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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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// Ensure that buffer resides in DRAM and it's DMA aligned.
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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);
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if (sdmmc_storage_write(&sd_storage, sector, count, buf))
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return RES_OK;
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return RES_ERROR;
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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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return RES_OK;
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}
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