|
|
/*/****************************************************************************
* name: GetMGAConfiguration** description: This function will read the strappings of the specified MGA* device from the Titan DSTi1-0 registers (with the PATCH).* Also this function will return a DAC id and some other* relevent informations.** designed: Bart Simpson, february 10, 1993* last modified: $Author: ctoutant $, $Date: 94/06/14 13:05:50 $** version: $Id: GETCFG.C 1.17 94/06/14 13:05:50 ctoutant Exp $** parameters: _Far BYTE *pMGA, DWORD* DST1, DWORD* DST0, DWORD* Info* modifies: *DST1, *DST0, *Info* calls: -* returns: DST0, DST1, Info*** NOTE: DST1, DST0 are in Titan format.** Info is 0x uuuu uuuu uuuu uuuu uuuu uuuu uuuu dddd** dddd : 2 MSB are DAC extended id* 2 LSB are DAC DUBIC id** 0000 : BT481* 0100 : BT482* 1000 : ATT* 1100 : Sierra** 0001 : ViewPoint** 0010 : BT484* 0110 : BT485** 0111 : PX2085** 0011 : Chameleon*******************************************************************************/
#define DEBUG_OUTPUT 0
#include "switches.h"
#include "g3dstd.h"
#include "caddi.h"
#include "def.h"
#include "mga.h"
#include "global.h"
#include "proto.h"
#include "mgai.h"
#if DEBUG_OUTPUT
extern VOID printf();#endif
#ifdef WINDOWS_NT
#if defined(ALLOC_PRAGMA)
#pragma alloc_text(PAGE,GetMGAConfiguration)
#endif
#if defined(ALLOC_PRAGMA)
#pragma data_seg("PAGE")
#endif
#include "video.h"
#endif /* #ifdef WINDOWS_NT */
VOID GetMGAConfiguration(volatile BYTE _Far *pDevice, DWORD *DST0, DWORD *DST1, DWORD *Info){ DWORD TmpDword; BYTE reg0, TmpByte, TmpByte1, TmpByte2, FifoCount; BYTE DacDetected; static DWORD DST0Cache, DST1Cache, InfoCache; static BOOL CacheFlag=FALSE;
if (0) { *DST0 = DST0Cache; *DST1 = DST1Cache; *Info = InfoCache; } else { { DWORD Opmode, SrcPage;
/*** Apply the patch procedure to get the straps in the DST1 and DST0 ***/
/** Wait until the FIFO is empty, Then we're sure that the Titan
*** is ready to process the DATA transfers. **/
FifoCount = 0; while (FifoCount < 32) mgaReadBYTE(*(pDevice + TITAN_OFFSET+TITAN_FIFOSTATUS),FifoCount);
/* Wait for the drawing engine to be idle */ mgaPollBYTE(*(pDevice + TITAN_OFFSET + TITAN_STATUS + 2),0x00,0x01);
mgaReadDWORD(*(pDevice + TITAN_OFFSET + TITAN_OPMODE), Opmode); mgaReadDWORD(*(pDevice + TITAN_OFFSET + TITAN_SRCPAGE), SrcPage);
mgaWriteDWORD(*(pDevice + TITAN_OFFSET + TITAN_OPMODE), Opmode & ~((DWORD)TITAN_FBM_M | (DWORD)TITAN_PSEUDODMA_M)); mgaWriteDWORD(*(pDevice + TITAN_OFFSET + TITAN_MCTLWTST), 0xffffffff); mgaWriteDWORD(*(pDevice + TITAN_OFFSET + TITAN_SRCPAGE), 0x00f80000);
mgaReadDWORD(*(pDevice + SRC_WIN_OFFSET), TmpDword); mgaReadDWORD(*(pDevice + SRC_WIN_OFFSET), TmpDword); mgaReadDWORD(*(pDevice + SRC_WIN_OFFSET), TmpDword); mgaReadDWORD(*(pDevice + SRC_WIN_OFFSET), TmpDword); mgaReadDWORD(*(pDevice + SRC_WIN_OFFSET), TmpDword); mgaReadDWORD(*(pDevice + SRC_WIN_OFFSET), TmpDword); mgaReadDWORD(*(pDevice + SRC_WIN_OFFSET), TmpDword); mgaReadDWORD(*(pDevice + SRC_WIN_OFFSET), TmpDword); TmpDword = TmpDword;
mgaReadDWORD(*(pDevice + TITAN_OFFSET + TITAN_DST0), (*DST0)); mgaReadDWORD(*(pDevice + TITAN_OFFSET + TITAN_DST1), (*DST1));
/*** Reset Opmode with pseudo-dma off first and then to its previous state ***/
mgaWriteDWORD(*(pDevice + TITAN_OFFSET + TITAN_OPMODE), Opmode & ~((DWORD)TITAN_PSEUDODMA_M)); mgaWriteDWORD(*(pDevice + TITAN_OFFSET + TITAN_OPMODE), Opmode); mgaWriteDWORD(*(pDevice + TITAN_OFFSET + TITAN_MCTLWTST), GetMGAMctlwtst(*DST0, *DST1)); mgaWriteDWORD(*(pDevice + TITAN_OFFSET + TITAN_SRCPAGE), SrcPage); }
#if DEBUG_OUTPUT
printf ("DST0=%lx, DST1=%lx\n", *DST0, *DST1); #endif
/** Because the Titan DSTi0-1 spec has changed after the binding
*** developpement (i.e. the rambank[0] bit has moved from bit 0 of DST0 *** to bit 3 of DST1) we duplicate the DST1[3] to DST0[24] because the *** binding has nothing to do with the new VGA BANK 0 bit **/ /*** Clear bit rambank 0 ***/ (*DST0) &= ~((DWORD)0x1 << TITAN_DST0_RAMBANK_A);
/*** DUPLICATE ***/ (*DST0) |= ((((*DST1) & (DWORD)TITAN_DST1_RAMBANK0_M) >> TITAN_DST1_RAMBANK0_A) << TITAN_DST0_RAMBANK_A);
/***** DETECT DAC TYPE *****/ mgaReadBYTE(*(pDevice + RAMDAC_OFFSET + VPOINT_INDEX), TmpByte2); mgaWriteBYTE(*(pDevice + RAMDAC_OFFSET + VPOINT_INDEX),VPOINT_ID); mgaReadBYTE(*(pDevice + RAMDAC_OFFSET + VPOINT_DATA), TmpByte); if (TmpByte == 0x20) DacDetected = (BYTE)Info_Dac_ViewPoint; else { mgaWriteBYTE(*(pDevice + RAMDAC_OFFSET + VPOINT_INDEX),TmpByte2); mgaWriteBYTE(*(pDevice + RAMDAC_OFFSET + TVP3026_INDEX),TVP3026_ID); mgaReadBYTE(*(pDevice + RAMDAC_OFFSET + TVP3026_DATA), TmpByte); if (TmpByte == 0x26) DacDetected = (BYTE)Info_Dac_TVP3026; else { mgaWriteBYTE(*(pDevice + RAMDAC_OFFSET + BT485_WADR_PAL), 0x00); mgaWriteBYTE(*(pDevice + RAMDAC_OFFSET + BT485_PIX_RD_MSK), 0xff); mgaReadBYTE(*(pDevice + RAMDAC_OFFSET + BT485_STATUS), TmpByte);
if ((TmpByte & (BYTE)ATT20C505_ID_M) == (BYTE)ATT20C505_ID) DacDetected = (BYTE)Info_Dac_ATT2050; else {/*** BEN TEST SPECIAL NE VEUT PAS ENTRER DANS CE IF ***/ if ((TmpByte & (BYTE)BT485_ID_M) == (BYTE)0x77)/* if ((TmpByte & (BYTE)BT485_ID_M) == (BYTE)BT485_ID) */ DacDetected = (BYTE)Info_Dac_BT485; else if ((TmpByte & (BYTE)BT484_ID_M) == (BYTE)BT484_ID) DacDetected = (BYTE)Info_Dac_BT484; else { mgaWriteBYTE(*(pDevice + RAMDAC_OFFSET + BT485_CUR_XLOW),0x00); mgaWriteBYTE(*(pDevice + RAMDAC_OFFSET + BT485_WADR_OVL),0x55); mgaReadBYTE(*(pDevice + RAMDAC_OFFSET + BT485_CUR_XLOW), TmpByte); if (TmpByte == 0x55) DacDetected = (BYTE)Info_Dac_BT482; /* SIERRA */ else { /*** Procedure to detect CL_PX2085 ***/ mgaWriteBYTE(*(pDevice + RAMDAC_OFFSET + BT485_CMD_REG0),0x82);
/*** Set index register ***/ mgaReadBYTE(*(pDevice + RAMDAC_OFFSET + BT485_STATUS),TmpByte2); TmpByte = TmpByte2 & 0x0f; TmpByte |= 0x40; mgaWriteBYTE(*(pDevice + RAMDAC_OFFSET + BT485_STATUS),TmpByte);
mgaReadBYTE(*(pDevice + RAMDAC_OFFSET + BT485_CMD_REG0),reg0); mgaWriteBYTE(*(pDevice + RAMDAC_OFFSET + BT485_CMD_REG0),0x02);
/*** Set direct register ***/ mgaReadBYTE(*(pDevice + RAMDAC_OFFSET + BT485_STATUS),TmpByte1); TmpByte = TmpByte & 0x0f; mgaWriteBYTE(*(pDevice + RAMDAC_OFFSET + BT485_STATUS),TmpByte);
mgaReadBYTE(*(pDevice + RAMDAC_OFFSET + BT485_CMD_REG0),TmpByte); mgaWriteBYTE(*(pDevice + RAMDAC_OFFSET + BT485_STATUS),TmpByte1); mgaWriteBYTE(*(pDevice + RAMDAC_OFFSET + BT485_CMD_REG0),reg0); mgaWriteBYTE(*(pDevice + RAMDAC_OFFSET + BT485_STATUS),TmpByte2);
if(TmpByte == 0x82) DacDetected = (BYTE)Info_Dac_PX2085; else DacDetected = (BYTE)Info_Dac_BT485; /* other DAC same as BT485 */
} } } }
}
*Info = (DWORD)DacDetected;
DST0Cache = *DST0; DST1Cache = *DST1; InfoCache = *Info; CacheFlag = TRUE; }}
|
