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Adjust screen width if HDTV cable in use

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svn path=/trunk/; revision=11856
This commit is contained in:
Gé van Geldorp 2004-11-28 21:54:11 +00:00
parent bbc25623e4
commit 90a424deea
1 changed files with 116 additions and 2 deletions
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118
freeldr/freeldr/arch/i386/xboxvideo.c
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@ -1,4 +1,4 @@
/* $Id: xboxvideo.c,v 1.4 2004/11/23 11:28:02 gvg Exp $
/* $Id: xboxvideo.c,v 1.5 2004/11/28 21:54:11 gvg Exp $
*
* FreeLoader
*
@ -25,6 +25,9 @@
#include "rtl.h"
#include "machine.h"
#include "machxbox.h"
#include "portio.h"
#define I2C_IO_BASE 0xc000
static PVOID FrameBuffer;
static U32 ScreenWidth;
@ -121,11 +124,122 @@ XboxVideoPutChar(int Ch, U8 Attr, unsigned X, unsigned Y)
XboxVideoOutputChar(Ch, X, Y, FgColor, BgColor);
}
static BOOL
ReadfromSMBus(UCHAR Address, UCHAR bRegister, UCHAR Size, U32 *Data_to_smbus)
{
int nRetriesToLive=50;
while (0 != (READ_PORT_USHORT((PU16) (I2C_IO_BASE + 0)) & 0x0800))
{
; /* Franz's spin while bus busy with any master traffic */
}
while (0 != nRetriesToLive--)
{
UCHAR b;
int temp;
WRITE_PORT_UCHAR((PUCHAR) (I2C_IO_BASE + 4), (Address << 1) | 1);
WRITE_PORT_UCHAR((PUCHAR) (I2C_IO_BASE + 8), bRegister);
temp = READ_PORT_USHORT((U16 *) (I2C_IO_BASE + 0));
WRITE_PORT_USHORT((PU16) (I2C_IO_BASE + 0), temp); /* clear down all preexisting errors */
switch (Size)
{
case 4:
WRITE_PORT_UCHAR((PUCHAR) (I2C_IO_BASE + 2), 0x0d); /* DWORD modus ? */
break;
case 2:
WRITE_PORT_UCHAR((PUCHAR) (I2C_IO_BASE + 2), 0x0b); /* WORD modus */
break;
default:
WRITE_PORT_UCHAR((PUCHAR) (I2C_IO_BASE + 2), 0x0a); // BYTE
break;
}
b = 0;
while (0 == (b & 0x36))
{
b = READ_PORT_UCHAR((PUCHAR) (I2C_IO_BASE + 0));
}
if (0 != (b & 0x24))
{
/* printf("I2CTransmitByteGetReturn error %x\n", b); */
}
if(0 == (b & 0x10))
{
/* printf("I2CTransmitByteGetReturn no complete, retry\n"); */
}
else
{
switch (Size)
{
case 4:
READ_PORT_UCHAR((PUCHAR) (I2C_IO_BASE + 6));
READ_PORT_UCHAR((PUCHAR) (I2C_IO_BASE + 9));
READ_PORT_UCHAR((PUCHAR) (I2C_IO_BASE + 9));
READ_PORT_UCHAR((PUCHAR) (I2C_IO_BASE + 9));
READ_PORT_UCHAR((PUCHAR) (I2C_IO_BASE + 9));
break;
case 2:
*Data_to_smbus = READ_PORT_USHORT((U16 *) (I2C_IO_BASE + 6));
break;
default:
*Data_to_smbus = READ_PORT_UCHAR((PUCHAR) (I2C_IO_BASE + 6));
break;
}
return TRUE;
}
}
return FALSE;
}
static BOOL
I2CTransmitByteGetReturn(UCHAR bPicAddressI2cFormat, UCHAR bDataToWrite, U32 *Return)
{
return ReadfromSMBus(bPicAddressI2cFormat, bDataToWrite, 1, Return);
}
VOID
XboxVideoInit(VOID)
{
U32 AvMode;
FrameBuffer = (PVOID)((U32) XboxMemReserveMemory(FB_SIZE_MB) | 0xf0000000);
ScreenWidth = 640;
if (I2CTransmitByteGetReturn(0x10, 0x04, &AvMode))
{
if (1 == AvMode) /* HDTV */
{
ScreenWidth = 720;
}
else
{
/* FIXME Other possible values of AvMode:
* 0 - AV_SCART_RGB
* 2 - AV_VGA_SOG
* 4 - AV_SVIDEO
* 6 - AV_COMPOSITE
* 7 - AV_VGA
* other AV_COMPOSITE
*/
ScreenWidth = 640;
}
}
else
{
ScreenWidth = 640;
}
ScreenHeight = 480;
BytesPerPixel = 4;
Delta = (ScreenWidth * BytesPerPixel + 3) & ~ 0x3;