git subrepo clone --branch=develop https://github.com/m4xw/emummc emummc

subrepo:
  subdir:   "emummc"
  merged:   "a9d569594"
upstream:
  origin:   "https://github.com/m4xw/emummc"
  branch:   "develop"
  commit:   "a9d569594"
git-subrepo:
  version:  "0.4.1"
  origin:   "???"
  commit:   "???"

emummc/source/libs/fatfs/diskio.c

@@ -0,0 +1,72 @@
+/*-----------------------------------------------------------------------*/
+/* 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 "diskio.h"		/* FatFs lower layer API */
+#include "../../emmc/sdmmc.h"
+
+extern sdmmc_storage_t sd_storage;
+
+/*-----------------------------------------------------------------------*/
+/* 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 */
+)
+{
+	return sdmmc_storage_read(&sd_storage, sector, count, buff) ? RES_OK : 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 */
+)
+{
+	return sdmmc_storage_write(&sd_storage, sector, count, (void *)buff) ? RES_OK : 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 */
+)
+{
+	return RES_OK;
+}