mirror of
https://github.com/wiiu-env/libfat.git
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185 lines
4.7 KiB
C
185 lines
4.7 KiB
C
/*
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disc.c
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uniformed io-interface to work with Chishm's FAT library
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Written by MightyMax
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Copyright (c) 2006 Michael "Chishm" Chisholm
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Redistribution and use in source and binary forms, with or without modification,
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are permitted provided that the following conditions are met:
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1. Redistributions of source code must retain the above copyright notice,
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this list of conditions and the following disclaimer.
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2. Redistributions in binary form must reproduce the above copyright notice,
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this list of conditions and the following disclaimer in the documentation and/or
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other materials provided with the distribution.
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3. The name of the author may not be used to endorse or promote products derived
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from this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
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WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
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AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE
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LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
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EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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2005-11-06 - Chishm
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* Added WAIT_CR modifications for NDS
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2006-02-03 www.neoflash.com
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* Added SUPPORT_* defines, comment out any of the SUPPORT_* defines in disc_io.h to remove support
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for the given interface and stop code being linked to the binary
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* Added support for MK2 MMC interface
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* Added disc_Cache* functions
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2006-02-05 - Chishm
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* Added Supercard SD support
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2006-02-26 - Cytex
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* Added EFA2 support
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2006-05-18 - Chishm
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* Rewritten for FATlib disc.c
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2006-06-19 - Chishm
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* Changed read and write interface to accept a u32 instead of a u8 for the number of sectors
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2006-07-11 - Chishm
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* Removed disc_Cache* functions, since there is now a proper unified cache
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* Removed SUPPORT_* defines
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* Rewrote device detection functions
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* First libfat release
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*/
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#include "disc.h"
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#include "disc_io.h"
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#ifdef NDS
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#include <nds.h>
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#endif
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// Include known io-interfaces:
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#include "io_mpcf.h"
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#include "io_m3cf.h"
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#include "io_m3sd.h"
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#include "io_sccf.h"
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#include "io_scsd.h"
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#include "io_fcsr.h"
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#include "io_nmmc.h"
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#include "io_efa2.h"
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#include "io_mmcf.h"
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IO_INTERFACE* ioInterfaces[] = {
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#ifdef NDS
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// Place Slot 1 (DS Card) interfaces here
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&_io_nmmc,
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#endif
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// Place Slot 2 (GBA Cart) interfaces here
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&_io_mpcf, &_io_m3cf, &_io_sccf, &_io_scsd, &_io_m3sd, &_io_fcsr
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// Experimental Slot 2 interfaces
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, &_io_mmcf, &_io_efa2
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};
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/*
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Hardware level disc funtions
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*/
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IO_INTERFACE* _FAT_disc_gbaSlotFindInterface (void)
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{
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// If running on an NDS, make sure the correct CPU can access
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// the GBA cart. First implemented by SaTa.
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#ifdef NDS
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#ifdef ARM9
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WAIT_CR &= ~ARM9_OWNS_ROM;
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#endif
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#ifdef ARM7
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WAIT_CR |= ARM9_OWNS_ROM;
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#endif
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#endif
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int i;
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for (i = 0; i < (sizeof(ioInterfaces) / sizeof(IO_INTERFACE*)); i++) {
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if ((ioInterfaces[i]->features & FEATURE_SLOT_GBA) && (ioInterfaces[i]->fn_startup())) {
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return ioInterfaces[i];
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}
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}
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return NULL;
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}
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#ifdef NDS
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/*
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* Check the DS card slot for a valid memory card interface
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* If an interface is found, it is set as the default interace
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* and it returns true. Otherwise the default interface is left
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* untouched and it returns false.
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*/
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IO_INTERFACE* _FAT_disc_dsSlotFindInterface (void)
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{
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#ifdef ARM9
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WAIT_CR &= ~ARM9_OWNS_CARD;
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#endif
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#ifdef ARM7
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WAIT_CR |= ARM9_OWNS_CARD;
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#endif
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int i;
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for (i = 0; i < (sizeof(ioInterfaces) / sizeof(IO_INTERFACE*)); i++) {
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if ((ioInterfaces[i]->features & FEATURE_SLOT_NDS) && (ioInterfaces[i]->fn_startup())) {
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return ioInterfaces[i];
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}
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}
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return NULL;
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}
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#endif
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/*
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* When running on an NDS, check the either slot for a valid memory
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* card interface.
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* When running on a GBA, call _FAT_disc_gbaSlotFindInterface
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* If an interface is found, it is set as the default interace
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* and it returns true. Otherwise the default interface is left
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* untouched and it returns false.
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*/
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#ifdef NDS
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IO_INTERFACE* _FAT_disc_findInterface (void)
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{
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#ifdef ARM9
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WAIT_CR &= ~(ARM9_OWNS_CARD | ARM9_OWNS_ROM);
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#endif
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#ifdef ARM7
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WAIT_CR |= (ARM9_OWNS_CARD | ARM9_OWNS_ROM);
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#endif
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int i;
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for (i = 0; i < (sizeof(ioInterfaces) / sizeof(IO_INTERFACE*)); i++) {
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if (ioInterfaces[i]->fn_startup()) {
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return ioInterfaces[i];
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}
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}
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return NULL;
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}
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#else
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IO_INTERFACE* _FAT_disc_findInterface (void)
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{
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return _FAT_disc_gbaSlotFindInterface();
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}
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#endif
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