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[Gamecube] fixed broken DVD support

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This commit is contained in:
EkeEke 2014-03-02 17:14:45 +01:00
parent e7754fd7cb
commit 9352c3414f
2 changed files with 87 additions and 12 deletions
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91
gx/fileio/file_load.c
View File

@ -3,7 +3,7 @@
*
* ROM File loading support
*
* Copyright Eke-Eke (2008-2012)
* Copyright Eke-Eke (2008-2014)
*
* Redistribution and use of this code or any derivative works are permitted
* provided that the following conditions are met:
@ -62,9 +62,9 @@ static const char rootdir[TYPE_RECENT][10] = {"/","dvd:/"};
/* DVD interface */
#ifdef HW_RVL
static const DISC_INTERFACE* dvd = &__io_wiidvd;
static DISC_INTERFACE* dvd = (DISC_INTERFACE*) &__io_wiidvd;
#else
static const DISC_INTERFACE* dvd = &__io_gcdvd;
static DISC_INTERFACE* dvd = (DISC_INTERFACE*) &__io_gcdvd;
#endif
/* current directory */
@ -76,8 +76,74 @@ static int deviceType = -1;
/* current file type */
static int fileType = -1;
/* DVD status flag */
static u8 dvd_mounted = 0;
/* DVD interface status flags */
static u8 dvdInited = 0;
static u8 dvdMounted = 0;
#ifndef HW_RVL
static u8 dvdBuffer[2048] ATTRIBUTE_ALIGN(32);
static bool dvdStartup()
{
DVD_Mount();
return true;
}
static bool dvdIsInserted()
{
return true;
}
static bool dvdReadSectors(u32 offset,u32 len,void *buffer)
{
vu32* const dvd = (u32*)0xCC006000;
offset = offset << 9;
len = len << 11;
/* DVD transfer must be done into a 32-byte aligned buffer */
while (len >= 2048)
{
DCInvalidateRange((void *)dvdBuffer, 2048);
dvd[0] = 0x2E;
dvd[1] = 0;
dvd[2] = 0xA8000000;
dvd[3] = offset;
dvd[4] = 2048;
dvd[5] = (u32) dvdBuffer;
dvd[6] = 2048;
dvd[7] = 3;
while (dvd[7] & 1);
if (dvd[0] & 4) return false;
memcpy (buffer, dvdBuffer, 2048);
len -= 2048;
buffer += 2048;
offset += 512;
}
/* Process remaining bytes (normally not needed since libiso9960 already deals with this but you never know) */
if (len)
{
/* DVD transfer length should be aligned to 32 bytes */
u32 dmasize = (len + 0x1f) & ~0x1f;
DCInvalidateRange((void *)dvdBuffer, dmasize);
dvd[0] = 0x2E;
dvd[1] = 0;
dvd[2] = 0xA8000000;
dvd[3] = offset;
dvd[4] = dmasize;
dvd[5] = (u32) dvdBuffer;
dvd[6] = dmasize;
dvd[7] = 3;
while (dvd[7] & 1);
if (dvd[0] & 4) return false;
memcpy (buffer, dvdBuffer, len);
}
return true;
}
#endif
/***************************************************************************
* MountDVD
@ -89,18 +155,27 @@ static int MountDVD(void)
GUI_MsgBoxOpen("Information", "Mounting DVD ...",1);
/* initialize DVD interface if needed */
if (!dvdInited)
{
#ifdef HW_RVL
DI_Init();
#else
DVD_Init();
/* patch libogc DVD interface which appears to be broken on Gamecube */
dvd->startup = (FN_MEDIUM_STARTUP)dvdStartup;
dvd->isInserted = (FN_MEDIUM_ISINSERTED)dvdIsInserted;
dvd->readSectors = (FN_MEDIUM_READSECTORS)dvdReadSectors;
#endif
dvdInited = 1;
}
/* check if DVD is already mounted */
if (dvd_mounted)
if (dvdMounted)
{
/* unmount DVD */
ISO9660_Unmount("dvd:");
dvd_mounted = 0;
dvdMounted = 0;
}
/* check if disc is found */
@ -118,7 +193,7 @@ static int MountDVD(void)
}
/* DVD is mounted */
dvd_mounted = 1;
dvdMounted = 1;
GUI_MsgBoxClose();
return 1;

2
gx/fileio/file_load.h
View File

@ -3,7 +3,7 @@
*
* ROM File loading support
*
* Copyright Eke-Eke (2008-2012)
* Copyright Eke-Eke (2008-2014)
*
* Redistribution and use of this code or any derivative works are permitted
* provided that the following conditions are met: