Genesis-Plus-GX/source/ngc/gui/mcard.c
ekeeke31 30997a1c43 - changelog updated
- added VFAT support and old files saved
- corrected some docs
- added SRAM crc calculation after SRAM saving on SDCARD
- modified reload_rom actions order
- fixed some vdp status bits
2007-08-16 10:03:18 +00:00

589 lines
16 KiB
C

/****************************************************************************
* Genesis Plus 1.2a
*
* Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003 Charles Mac Donald
*
* 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; either version 2 of the License, or
* (at your option) any later version.
*
* 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 "shared.h"
#include "dvd.h"
#include "font.h"
#include "rominfo.h"
#include "saveicon.h" /*** Nice little icon - thanks brakken! ***/
/* Support for MemCards */
/**
* libOGC System Work Area
*/
static u8 SysArea[CARD_WORKAREA] ATTRIBUTE_ALIGN (32);
/**
* DMA Transfer Area.
* Must be 32-byte aligned.
* 64k SRAM + 2k Icon
*/
unsigned char savebuffer[0x24000] ATTRIBUTE_ALIGN (32);
card_dir CardDir;
card_file CardFile;
card_stat CardStatus;
extern int CARDSLOT;
extern int use_SDCARD;
int ManageSRAM (int direction);
int ManageState (int direction);
/****************************************************************************
* SRAM autoload
*
* the detection order is the following:
* MCARD (SLOTA) > MCARD (SLOTB) > SDCARD (SLOTA) > SDCARD (SLOTB)
*
*****************************************************************************/
extern u8 SILENT;
void sram_autoload()
{
int ret = 0;
int i = 0;
int old_cardslot = CARDSLOT;
int old_sdcard = use_SDCARD;
SILENT = 1; /* this should be transparent to the user */
while ((i < 4) && (!ret))
{
use_SDCARD = (i&2) ? 1 : 0;
CARDSLOT = (i&1) ? CARD_SLOTB : CARD_SLOTA;
ret = ManageSRAM(1);
i++;
}
if (!ret)
{
/* restore old settings if not found */
CARDSLOT = old_cardslot;
use_SDCARD = old_sdcard;
}
SILENT = 0;
}
/****************************************************************************
* SDCARD Access functions
*
* We use the same buffer as for Memory Card manager
* Function returns TRUE on success.
*****************************************************************************/
int SD_ManageFile(char *filename, int direction, int filetype)
{
char name[1024];
sd_file *handle;
int len = 0;
int offset = 0;
int filesize;
unsigned long inbytes,outbytes;
/* build complete SDCARD filename */
sprintf (name, "dev%d:\\genplus\\saves\\%s", CARDSLOT, filename);
/* open file */
handle = direction ? SDCARD_OpenFile (name, "rb") :
SDCARD_OpenFile (name, "wb");
if (handle == NULL)
{
sprintf (filename, "Error opening %s", name);
WaitPrompt(filename);
return 0;
}
switch (direction)
{
case 0: /* SAVING */
if (filetype) /* SRAM */
{
inbytes = 0x10000;
outbytes = 0x12000;
compress2 ((char *) &savebuffer[sizeof(outbytes)], &outbytes, (char *) &sram.sram, inbytes, 9);
memcpy(&savebuffer[0], &outbytes, sizeof(outbytes));
filesize = outbytes + sizeof(outbytes);
}
else filesize = state_save(&savebuffer[0]); /* STATE */
len = SDCARD_WriteFile (handle, savebuffer, filesize);
SDCARD_CloseFile (handle);
if (len != filesize)
{
sprintf (filename, "Error writing %s", name);
WaitPrompt (filename);
return 0;
}
if (filetype) sram.crc = crc32 (0, &sram.sram[0], 0x10000);
sprintf (filename, "Saved %d bytes successfully", filesize);
WaitPrompt (filename);
return 1;
case 1: /* LOADING */
while ((len = SDCARD_ReadFile (handle, &savebuffer[offset], 2048)) > 0) offset += len;
if (filetype) /* SRAM */
{
memcpy(&inbytes,&savebuffer[0],sizeof(inbytes));
outbytes = 0x10000;
uncompress ((char *) &sram.sram, &outbytes, (char *) &savebuffer[sizeof(inbytes)], inbytes);
sram.crc = crc32 (0, &sram.sram[0], outbytes);
system_reset ();
}
else state_load(&savebuffer[0]); /* STATE */
SDCARD_CloseFile (handle);
sprintf (filename, "Loaded %d bytes successfully", offset);
WaitPrompt (filename);
return 1;
}
return 0;
}
/****************************************************************************
* MountTheCard
*
* libOGC provides the CARD_Mount function, and it should be all you need.
* However, experience with previous emulators has taught me that you are
* better off doing a little bit more than that!
*
* Function returns TRUE on success.
*****************************************************************************/
int MountTheCard ()
{
int tries = 0;
int CardError;
while (tries < 10)
{
*(unsigned long *) (0xcc006800) |= 1 << 13; /*** Disable Encryption ***/
uselessinquiry ();
VIDEO_WaitVSync ();
CardError = CARD_Mount (CARDSLOT, SysArea, NULL); /*** Don't need or want a callback ***/
if (CardError == 0) return 1;
else EXI_ProbeReset ();
tries++;
}
return 0;
}
/****************************************************************************
* CardFileExists
*
* Wrapper to search through the files on the card.
* Returns TRUE if found.
****************************************************************************/
int CardFileExists (char *filename)
{
int CardError = CARD_FindFirst (CARDSLOT, &CardDir, TRUE);
while (CardError != CARD_ERROR_NOFILE)
{
CardError = CARD_FindNext (&CardDir);
if (strcmp ((char *) CardDir.filename, filename) == 0) return 1;
}
return 0;
}
/****************************************************************************
* ManageSRAM
*
* Here is the main SRAM Management stuff.
* The output file contains an icon (2K), 64 bytes comment and the SRAM (64k).
* As memcards are allocated in blocks of 8k or more, you have a around
* 6k bytes to save/load any other data you wish without altering any of the
* main save / load code.
*
* direction == 0 save, 1 load.
****************************************************************************/
int ManageSRAM (int direction)
{
char filename[128];
char action[80];
int CardError;
unsigned int SectorSize;
int blocks;
char comment[2][32] = { {"Genesis Plus 1.2a"}, {"SRAM Save"} };
int outbytes = 0;
int sbo;
int i;
unsigned long inzipped,outzipped;
if (!genromsize) return 0;
if (direction) ShowAction ("Loading SRAM ...");
else ShowAction ("Saving SRAM ...");
/* First, build a filename based on the information retrieved for this ROM */
if (strlen (rominfo.domestic)) strcpy (filename, rominfo.domestic);
else strcpy (filename, rominfo.international);
/* As these names tend to be bulked with spaces, let's strip them */
/* Name should be in 16 character blocks, so take first 16 */
filename[16] = 0;
for (i = strlen (filename) - 1; i > 0; i--)
if (filename[i] != 32) break;
filename[i + 1] = 0;
/* Now add the 16bit checksum, to ensure it's the same ROM */
sprintf (filename, "%s%02X.srm", filename, rominfo.checksum);
strcpy (comment[1], filename);
/* device is SDCARD, let's go */
if (use_SDCARD) return SD_ManageFile(filename,direction,1);
/* device is MCARD, we continue */
if (direction == 0) /*** Saving ***/
{
/*** Build the output buffer ***/
memcpy (&savebuffer, &icon, 2048);
memcpy (&savebuffer[2048], &comment[0], 64);
inzipped = 0x10000;
outzipped = 0x12000;
compress2 ((char *) &savebuffer[2112+sizeof(outzipped)], &outzipped, (char *) &sram.sram, inzipped, 9);
memcpy(&savebuffer[2112], &outzipped, sizeof(outzipped));
}
outbytes = 2048 + 64 + outzipped + sizeof(outzipped);
/*** Initialise the CARD system ***/
memset (&SysArea, 0, CARD_WORKAREA);
CARD_Init ("GENP", "00");
/*** Attempt to mount the card ***/
CardError = MountTheCard ();
if (CardError)
{
/*** Retrieve the sector size ***/
CardError = CARD_GetSectorSize (CARDSLOT, &SectorSize);
switch (direction)
{
case 0: /*** Saving ***/
/*** Determine number of blocks on this card ***/
blocks = (outbytes / SectorSize) * SectorSize;
if (outbytes % SectorSize) blocks += SectorSize;
/*** Check if a previous save exists ***/
if (CardFileExists (filename))
{
CardError = CARD_Open (CARDSLOT, filename, &CardFile);
if (CardError)
{
sprintf (action, "Error Open : %d", CardError);
WaitPrompt (action);
CARD_Unmount (CARDSLOT);
return 0;
}
int size = CardFile.len;
CARD_Close (&CardFile);
if (size < blocks)
{
/* new size is bigger: check if there is enough space left */
CardError = CARD_Create (CARDSLOT, "TEMP", blocks-size, &CardFile);
if (CardError)
{
sprintf (action, "Error Update : %d", CardError);
WaitPrompt (action);
CARD_Unmount (CARDSLOT);
return 0;
}
CARD_Close (&CardFile);
CARD_Delete(CARDSLOT, "TEMP");
}
/* always delete existing slot */
CARD_Delete(CARDSLOT, filename);
}
/*** Create a new slot ***/
CardError = CARD_Create (CARDSLOT, filename, blocks, &CardFile);
if (CardError)
{
sprintf (action, "Error create : %d %d", CardError, CARDSLOT);
WaitPrompt (action);
CARD_Unmount (CARDSLOT);
return 0;
}
/*** Continue and save ***/
CARD_GetStatus (CARDSLOT, CardFile.filenum, &CardStatus);
CardStatus.icon_addr = 0x0;
CardStatus.icon_fmt = 2;
CardStatus.icon_speed = 1;
CardStatus.comment_addr = 2048;
CARD_SetStatus (CARDSLOT, CardFile.filenum, &CardStatus);
/*** And write the blocks out ***/
sbo = 0;
while (outbytes > 0)
{
CardError = CARD_Write (&CardFile, &savebuffer[sbo], SectorSize, sbo);
outbytes -= SectorSize;
sbo += SectorSize;
}
CARD_Close (&CardFile);
CARD_Unmount (CARDSLOT);
sram.crc = crc32 (0, &sram.sram[0], 0x10000);
sprintf (action, "Saved %d bytes successfully", blocks);
WaitPrompt (action);
return 1;
default: /*** Loading ***/
if (!CardFileExists (filename))
{
WaitPrompt ("No SRAM File Found");
CARD_Unmount (CARDSLOT);
return 0;
}
memset (&CardFile, 0, sizeof (CardFile));
CardError = CARD_Open (CARDSLOT, filename, &CardFile);
if (CardError)
{
sprintf (action, "Error Open : %d", CardError);
WaitPrompt (action);
CARD_Unmount (CARDSLOT);
return 0;
}
blocks = CardFile.len;
if (blocks < SectorSize) blocks = SectorSize;
if (blocks % SectorSize) blocks++;
/*** Just read the file back in ***/
sbo = 0;
int size = blocks;
while (blocks > 0)
{
CARD_Read (&CardFile, &savebuffer[sbo], SectorSize, sbo);
sbo += SectorSize;
blocks -= SectorSize;
}
CARD_Close (&CardFile);
CARD_Unmount (CARDSLOT);
/* Copy to SRAM */
memcpy(&inzipped,&savebuffer[2112],sizeof(inzipped));
outzipped = 0x10000;
uncompress ((char *) &sram.sram, &outzipped, (char *) &savebuffer[2112+sizeof(inzipped)], inzipped);
sram.crc = crc32 (0, &sram.sram[0], 0x10000);
system_reset ();
/*** Inform user ***/
sprintf (action, "Loaded %d bytes successfully", size);
WaitPrompt (action);
return 1;
}
}
else WaitPrompt ("Unable to mount memory card");
return 0; /*** Signal failure ***/
}
/****************************************************************************
* ManageSTATE
*
* Here is the main Freeze File Management stuff.
* The output file contains an icon (2K), 64 bytes comment and the STATE (~128k)
*
* direction == 0 save, 1 load.
****************************************************************************/
int ManageState (int direction)
{
char filename[128];
char action[80];
int CardError;
unsigned int SectorSize;
int blocks;
char comment[2][32] = { {"Genesis Plus 1.2a [FRZ]"}, {"Freeze State"} };
int outbytes;
int sbo;
int i;
int state_size = 0;
if (!genromsize) return 0;
if (direction) ShowAction ("Loading State ...");
else ShowAction ("Saving State ...");
/* First, build a filename based on the information retrieved for this ROM */
if (strlen (rominfo.domestic)) strcpy (filename, rominfo.domestic);
else strcpy (filename, rominfo.international);
/* As these names tend to be bulked with spaces, let's strip them */
/* Name should be in 16 character blocks, so take first 16 */
filename[16] = 0;
for (i = strlen (filename) - 1; i > 0; i--) if (filename[i] != 32) break;
filename[i + 1] = 0;
/* Now add the 16bit checksum, to ensure it's the same ROM */
sprintf (filename, "%s%02X.gpz", filename, rominfo.checksum);
strcpy (comment[1], filename);
/* device is SDCARD, let's go */
if (use_SDCARD) return SD_ManageFile(filename,direction,0);
/* device is MCARD, we continue */
if (direction == 0) /* Saving */
{
/* Build the output buffer */
memcpy (&savebuffer, &icon, 2048);
memcpy (&savebuffer[2048], &comment[0], 64);
state_size = state_save(&savebuffer[2112]);
}
outbytes = 2048 + 64 + state_size;
/*** Initialise the CARD system ***/
memset (&SysArea, 0, CARD_WORKAREA);
CARD_Init ("GENP", "00");
/*** Attempt to mount the card ***/
CardError = MountTheCard ();
if (CardError)
{
/*** Retrieve the sector size ***/
CardError = CARD_GetSectorSize (CARDSLOT, &SectorSize);
switch (direction)
{
case 0: /*** Saving ***/
/*** Determine number of blocks on this card ***/
blocks = (outbytes / SectorSize) * SectorSize;
if (outbytes % SectorSize) blocks += SectorSize;
/*** Check if a previous save exists ***/
if (CardFileExists (filename))
{
CardError = CARD_Open (CARDSLOT, filename, &CardFile);
if (CardError)
{
sprintf (action, "Error Open : %d", CardError);
WaitPrompt (action);
CARD_Unmount (CARDSLOT);
return 0;
}
int size = CardFile.len;
CARD_Close (&CardFile);
if (size < blocks)
{
/* new size is bigger: check if there is enough space left */
CardError = CARD_Create (CARDSLOT, "TEMP", blocks-size, &CardFile);
if (CardError)
{
sprintf (action, "Error Update : %d", CardError);
WaitPrompt (action);
CARD_Unmount (CARDSLOT);
return 0;
}
CARD_Close (&CardFile);
CARD_Delete(CARDSLOT, "TEMP");
}
/* always delete existing slot */
CARD_Delete(CARDSLOT, filename);
}
/*** Create a new slot ***/
CardError = CARD_Create (CARDSLOT, filename, blocks, &CardFile);
if (CardError)
{
sprintf (action, "Error create : %d %d", CardError, CARDSLOT);
WaitPrompt (action);
CARD_Unmount (CARDSLOT);
return 0;
}
/*** Continue and save ***/
CARD_GetStatus (CARDSLOT, CardFile.filenum, &CardStatus);
CardStatus.icon_addr = 0x0;
CardStatus.icon_fmt = 2;
CardStatus.icon_speed = 1;
CardStatus.comment_addr = 2048;
CARD_SetStatus (CARDSLOT, CardFile.filenum, &CardStatus);
/*** And write the blocks out ***/
sbo = 0;
while (outbytes > 0)
{
CardError = CARD_Write (&CardFile, &savebuffer[sbo], SectorSize, sbo);
outbytes -= SectorSize;
sbo += SectorSize;
}
CARD_Close (&CardFile);
CARD_Unmount (CARDSLOT);
sprintf (action, "Saved %d bytes successfully", blocks);
WaitPrompt (action);
return 1;
default: /*** Loading ***/
if (!CardFileExists (filename))
{
WaitPrompt ("No Savestate Found");
CARD_Unmount (CARDSLOT);
return 0;
}
memset (&CardFile, 0, sizeof (CardFile));
CardError = CARD_Open (CARDSLOT, filename, &CardFile);
if (CardError)
{
sprintf (action, "Error Open : %d", CardError);
WaitPrompt (action);
CARD_Unmount (CARDSLOT);
return 0;
}
blocks = CardFile.len;
if (blocks < SectorSize) blocks = SectorSize;
if (blocks % SectorSize) blocks++;
/*** Just read the file back in ***/
sbo = 0;
int size = blocks;
while (blocks > 0)
{
CARD_Read (&CardFile, &savebuffer[sbo], SectorSize, sbo);
sbo += SectorSize;
blocks -= SectorSize;
}
CARD_Close (&CardFile);
CARD_Unmount (CARDSLOT);
state_load(&savebuffer[2112]);
/*** Inform user ***/
sprintf (action, "Loaded %d bytes successfully", size);
WaitPrompt (action);
return 1;
}
}
else WaitPrompt ("Unable to mount memory card");
return 0; /*** Signal failure ***/
}