mini/diskio.c

/*
	mini - a Free Software replacement for the Nintendo/BroadOn IOS.

	glue layer for FatFs

Copyright (C) 2008, 2009 	Sven Peter <svenpeter@gmail.com>
Copyright (C) 2008, 2009 	Haxx Enterprises <bushing@gmail.com>

This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, version 2.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

*/

#include "diskio.h"
#include "string.h"
#include "sdmmc.h"

#ifndef MEM2_BSS
#define MEM2_BSS
#endif

static u8 buffer[512] MEM2_BSS ALIGNED(32);

// Initialize a Drive

DSTATUS disk_initialize (BYTE drv) {
	if (sdmmc_check_card(SDMMC_DEFAULT_DEVICE) == SDMMC_NO_CARD)
		return STA_NOINIT;

	sdmmc_ack_card(SDMMC_DEFAULT_DEVICE);
	return disk_status(drv);
}



// Return Disk Status

DSTATUS disk_status (BYTE drv) {
	(void)drv;
	if (sdmmc_check_card(SDMMC_DEFAULT_DEVICE) == SDMMC_INSERTED)
		return 0;
	else
		return STA_NODISK;
}



// Read Sector(s)

DRESULT disk_read (BYTE drv, BYTE *buff, DWORD sector, BYTE count) {
	int i;
	(void)drv;
	for (i = 0; i < count; i++) {
		if (sdmmc_read(SDMMC_DEFAULT_DEVICE, sector+i, 1, buffer) != 0)
			return RES_ERROR;
		memcpy(buff + i * 512, buffer, 512);
	}

	return RES_OK;
}



// Write Sector(s)

#if _READONLY == 0
DRESULT disk_write (BYTE drv, const BYTE *buff, DWORD sector, BYTE count) {
	int i;

	for (i = 0; i < count; i++) {
		memcpy(buffer, buff + i * 512, 512);

		if(sdmmc_write(SDMMC_DEFAULT_DEVICE, sector + i, 1, buffer) != 0)
			return RES_ERROR;
	}

	return RES_OK;
}
#endif /* _READONLY */

#if _USE_IOCTL == 1
DRESULT disk_ioctl (BYTE drv, BYTE ctrl, void *buff) {
	if (ctrl == CTRL_SYNC)
		return RES_OK;

	return RES_PARERR;
}
#endif /* _USE_IOCTL */