init301.c

内核linux2.4.20,可跟rtlinux3.2打补丁 组成实时linux系统,编译内核

	if (ModeNo <= 0x13) {
		modeflag = SiS_SModeIDTable[ModeIdIndex].St_ModeFlag;	/* si+St_ResInfo */
		resinfo = SiS_SModeIDTable[ModeIdIndex].St_ResInfo;
	} else {
		modeflag = SiS_EModeIDTable[ModeIdIndex].Ext_ModeFlag;	/* si+Ext_ResInfo */
		resinfo = SiS_EModeIDTable[ModeIdIndex].Ext_RESINFO;
	}

	tempax = SiS_LCDHDES;
	tempbx = SiS_HDE;
	tempcx = SiS_HT;

	if (SiS_LCDInfo & LCDNonExpanding) {
		if (SiS_LCDResInfo == Panel1280x1024)
			tempbx = 1280;
		if (SiS_LCDResInfo == Panel1024x768)
			tempbx = 1024;
	}
	tempcx = tempcx - tempbx;	/* HT-HDE  */
	push1 = tempax;
	tempax = tempax + tempbx;	/* lcdhdee  */
	tempbx = SiS_HT;
	if (tempax >= tempbx) {
		tempax = tempax - tempbx;
	}
	push2 = tempax;
	/* push ax   lcdhdee  */
	tempcx = tempcx >> 2;	/* temp  */
	tempcx = tempcx + tempax;	/* lcdhrs  */
	if (tempcx >= tempbx) {
		tempcx = tempcx - tempbx;
	}
	/* v ah,cl  */
	tempax = tempcx;
	tempax = tempax >> 3;	/* BPLHRS */
	temp = tempax & 0x00FF;
	SiS_SetReg1 (SiS_Part1Port, 0x14, temp);	/* Part1_14h  */
	temp = (tempax & 0x00FF) + 10;
	temp = temp & 0x01F;
	temp = temp | (((tempcx & 0x00ff) & 0x07) << 5);
	SiS_SetReg1 (SiS_Part1Port, 0x15, temp);	/* Part1_15h  */
	tempbx = push2;		/* lcdhdee  */
	tempcx = push1;		/* lcdhdes  */
	temp = (tempcx & 0x00FF);
	temp = temp & 0x07;	/* BPLHDESKEW  */
	SiS_SetReg1 (SiS_Part1Port, 0x1A, temp);	/* Part1_1Ah  */
	tempcx = tempcx >> 3;	/* BPLHDES */
	temp = (tempcx & 0x00FF);
	SiS_SetReg1 (SiS_Part1Port, 0x16, temp);	/* Part1_16h  */
	if (tempbx & 0x07)
		tempbx = tempbx + 8;
	tempbx = tempbx >> 3;	/* BPLHDEE  */
	temp = tempbx & 0x00FF;
	SiS_SetReg1 (SiS_Part1Port, 0x17, temp);	/* Part1_17h  */

	tempcx = SiS_VGAVT;
	tempbx = SiS_VGAVDE;
	tempcx = tempcx - tempbx;	/* GAVT-VGAVDE  */
	tempbx = SiS_LCDVDES;	/* VGAVDES  */
	push1 = tempbx;		/* push bx temppush1 */
	if (SiS_IF_DEF_TRUMPION == 0) {
		if (SiS_IF_DEF_CH7005 == 1) {
			if (SiS_VBInfo & SetCRT2ToTV) {
				tempax = SiS_VGAVDE;
			}
		}

		if (SiS_LCDResInfo == Panel1024x768)
			tempax = 768;
		if (SiS_LCDResInfo == Panel1280x1024)
			tempax = 1024;

	} else
		tempax = SiS_VGAVDE;
	tempbx = tempbx + tempax;
	tempax = SiS_VT;	/* VT  */
	if (tempbx >= SiS_VT) {
		tempbx = tempbx - tempax;
	}
	push2 = tempbx;		/* push bx  temppush2  */
	tempcx = tempcx >> 1;
	tempbx = tempbx + tempcx;
	tempbx++;		/* BPLVRS  */
	if (tempbx >= tempax) {
		tempbx = tempbx - tempax;
	}
	temp = tempbx & 0x00FF;
	SiS_SetReg1 (SiS_Part1Port, 0x18, temp);	/* Part1_18h  */
	tempcx = tempcx >> 3;
	tempcx = tempcx + tempbx;
	tempcx++;		/* BPLVRE  */
	temp = tempcx & 0x00FF;
	temp = temp & 0x0F;
	SiS_SetRegANDOR (SiS_Part1Port, 0x19, ~0x00F, temp);	/* Part1_19h  */
	temp = (tempbx & 0xFF00) >> 8;
	temp = temp & 0x07;
	temp = temp << 3;	/* BPLDESKEW =0 */
	tempbx = SiS_VGAVDE;
	if (tempbx != SiS_VDE) {
		temp = temp | 0x40;
	}
	if (SiS_SetFlag & EnableLVDSDDA) {
		temp = temp | 0x40;
	}
	if (SiS_LCDInfo & LCDRGB18Bit) {
		temp = temp | 0x80;
	}
	SiS_SetRegANDOR (SiS_Part1Port, 0x1A, 0x07, temp);	/* Part1_1Ah */

	tempbx = push2;		/* p bx temppush2 BPLVDEE  */
	tempcx = push1;		/* pop cx temppush1 NPLVDES */
	push1 = (USHORT) (tempeax & 0xFFFF);

	if (!(SiS_VBInfo & SetInSlaveMode)) {
		if (SiS_LCDResInfo == Panel800x600) {
			if (resinfo == 7)
				tempcx++;
		} else {
			if (SiS_LCDResInfo == Panel1024x768) {
				if (resinfo == 8)
					tempcx++;
			}
		}
	}

	temp = (tempbx & 0xFF00) >> 8;
	temp = temp & 0x07;
	temp = temp << 3;
	temp = temp | (((tempcx & 0xFF00) >> 8) & 0x07);
	SiS_SetReg1 (SiS_Part1Port, 0x1D, temp);	/* Part1_1Dh */
	temp = tempbx & 0x00FF;
	SiS_SetReg1 (SiS_Part1Port, 0x1C, temp);	/* Part1_1Ch  */
	temp = tempcx & 0x00FF;
	SiS_SetReg1 (SiS_Part1Port, 0x1B, temp);	/* Part1_1Bh  */

	tempecx = SiS_VGAVT;
	tempebx = SiS_VDE;
	tempeax = SiS_VGAVDE;
	tempecx = tempecx - tempeax;	/* VGAVT-VGAVDE  */
	tempeax = tempeax << 18;
	temp = (USHORT) (tempeax % tempebx);
	tempeax = tempeax / tempebx;
	if (temp != 0) {
		tempeax++;
	}
	tempebx = tempeax;	/* BPLVCFACT  */
	tempvcfact = tempeax;	/*301b */
	temp = (USHORT) (tempebx & 0x00FF);
	SiS_SetReg1 (SiS_Part1Port, 0x37, temp);
	temp = (USHORT) ((tempebx & 0x00FF00) >> 8);
	SiS_SetReg1 (SiS_Part1Port, 0x36, temp);
	temp = (USHORT) ((tempebx & 0x00030000) >> 16);
	if (SiS_VDE == SiS_VGAVDE) {
		temp = temp | 0x04;
	}

	SiS_SetReg1 (SiS_Part1Port, 0x35, temp);

	tempecx = SiS_VGAHDE;
	tempebx = SiS_HDE;
	tempeax = tempecx;
	tempeax = tempeax << 6;
	tempeax = tempeax << 10;
	tempeax = tempeax / tempebx;
	if (tempebx == tempecx) {
		tempeax = 65535;
	}
	tempecx = tempeax;
	tempeax = SiS_VGAHDE;	/*301b to change HT->HDE */
	tempeax = tempeax << 6;
	tempeax = tempeax << 10;
	tempeax = tempeax / tempecx;
	tempecx = tempecx << 16;
	tempeax = tempeax - 1;
	tempecx = tempecx | (tempeax & 0x00FFFF);
	temp = (USHORT) (tempecx & 0x00FF);
	SiS_SetReg1 (SiS_Part1Port, 0x1F, temp);	/* Part1_1Fh  */

	tempeax = SiS_VGAVDE;
	tempeax = tempeax << 18;	/*301b */
	tempeax = tempeax / tempvcfact;
	tempbx = (USHORT) (tempeax & 0x0FFFF);
	if (SiS_LCDResInfo == Panel1024x768)
		tempbx--;
	if (SiS_SetFlag & EnableLVDSDDA) {
		tempbx = 1;
	}
	temp = ((tempbx & 0xFF00) >> 8) << 3;
	temp = temp | (USHORT) (((tempecx & 0x0000FF00) >> 8) & 0x07);
	SiS_SetReg1 (SiS_Part1Port, 0x20, temp);	/* Part1_20h */
	temp = tempbx & 0x00FF;
	SiS_SetReg1 (SiS_Part1Port, 0x21, temp);	/* Part1_21h */
	tempecx = tempecx >> 16;	/* BPLHCFACT  */

	temp = (USHORT) ((tempecx & 0x0000FF00) >> 8);
	SiS_SetReg1 (SiS_Part1Port, 0x22, temp);	/* Part1_22h */
	temp = (USHORT) (tempecx & 0x000000FF);
	SiS_SetReg1 (SiS_Part1Port, 0x23, temp);
	return;
}

/*end 301b*/
void
SiS_SetTPData ()
{
	return;
}

void
SiS_SetCRT2Offset (USHORT SiS_Part1Port, ULONG ROMAddr, USHORT ModeNo,
		   USHORT ModeIdIndex, USHORT RefreshRateTableIndex,
		   PSIS_HW_DEVICE_INFO HwDeviceExtension)
{
	USHORT offset;
	UCHAR temp;

	if (SiS_VBInfo & SetInSlaveMode) {
		return;
	}
	offset =
	    SiS_GetOffset (ROMAddr, ModeNo, ModeIdIndex, RefreshRateTableIndex,
			   HwDeviceExtension);
	temp = (UCHAR) (offset & 0xFF);
	SiS_SetReg1 (SiS_Part1Port, 0x07, temp);
	temp = (UCHAR) ((offset & 0xFF00) >> 8);
	SiS_SetReg1 (SiS_Part1Port, 0x09, temp);
	temp = (UCHAR) (((offset >> 3) & 0xFF) + 1);
	SiS_SetReg1 (SiS_Part1Port, 0x03, temp);
}

USHORT
SiS_GetOffset (ULONG ROMAddr, USHORT ModeNo, USHORT ModeIdIndex,
	       USHORT RefreshRateTableIndex,
	       PSIS_HW_DEVICE_INFO HwDeviceExtension)
{
	USHORT temp, colordepth;
	USHORT modeinfo, index, infoflag;
	USHORT ColorDepth[] = { 0x01, 0x02, 0x04 };

	modeinfo = SiS_EModeIDTable[ModeIdIndex].Ext_ModeInfo;
	infoflag = SiS_RefIndex[RefreshRateTableIndex].Ext_InfoFlag;
	if (HwDeviceExtension->jChipType < SIS_315H) {	/* 300 series */
		index = (modeinfo >> 4) & 0xFF;
	} else {		/* 310 series */

		index = (modeinfo >> 8) & 0xFF;
	}
	temp = SiS_ScreenOffset[index];
	if (infoflag & InterlaceMode) {
		temp = temp << 1;
	}
	colordepth = SiS_GetColorDepth (ROMAddr, ModeNo, ModeIdIndex);

	if ((ModeNo >= 0x7C) && (ModeNo <= 0x7E)) {
		temp = ModeNo - 0x7C;
		colordepth = ColorDepth[temp];
		temp = 0x6B;
		if (infoflag & InterlaceMode) {
			temp = temp << 1;
		}
		return (temp * colordepth);
	} else
		return (temp * colordepth);
}

USHORT
SiS_GetColorDepth (ULONG ROMAddr, USHORT ModeNo, USHORT ModeIdIndex)
{
	USHORT ColorDepth[6] = { 1, 2, 4, 4, 6, 8 };
	SHORT index;
	USHORT modeflag;

	if (ModeNo <= 0x13) {
		modeflag = SiS_SModeIDTable[ModeIdIndex].St_ModeFlag;
	} else {
		modeflag = SiS_EModeIDTable[ModeIdIndex].Ext_ModeFlag;
	}
	index = (modeflag & ModeInfoFlag) - ModeEGA;
	if (index < 0)
		index = 0;
	return (ColorDepth[index]);
}

void
SiS_SetCRT2Sync (USHORT BaseAddr, ULONG ROMAddr, USHORT ModeNo,
		 USHORT RefreshRateTableIndex)
{
	USHORT tempah = 0, infoflag, flag;

	flag = 0;
	infoflag = SiS_RefIndex[RefreshRateTableIndex].Ext_InfoFlag;
	if (SiS_IF_DEF_LVDS == 1) {
		if (SiS_VBInfo & SetCRT2ToLCD) {
			tempah = SiS_LCDInfo;
			if (tempah & LCDSync) {
				flag = 1;
			}
		}
	}
	if (flag != 1)
		tempah = infoflag >> 8;
	tempah = tempah & 0xC0;
	tempah = tempah | 0x20;
	if (!(SiS_LCDInfo & LCDRGB18Bit))
		tempah = tempah | 0x10;
	if (SiS_IF_DEF_CH7005 == 1)
		tempah = tempah | 0xC0;

	SiS_SetRegANDOR (SiS_Part1Port, 0x19, 0x3F, tempah);
}

void
SiS_SetCRT2FIFO (USHORT SiS_Part1Port, ULONG ROMAddr, USHORT ModeNo,
		 PSIS_HW_DEVICE_INFO HwDeviceExtension)
{
	USHORT temp, index;
	USHORT modeidindex, refreshratetableindex;
	USHORT VCLK, MCLK, colorth = 0, data, data2;
	ULONG eax;
	UCHAR LatencyFactor[] = { 97, 88, 86, 79, 77, 00,	/*; 64  bit    BQ=2   */
		00, 87, 85, 78, 76, 54,	/*; 64  bit    BQ=1   */
		97, 88, 86, 79, 77, 00,	/*; 128 bit    BQ=2   */
		00, 79, 77, 70, 68, 48,	/*; 128 bit    BQ=1   */
		80, 72, 69, 63, 61, 00,	/*; 64  bit    BQ=2   */
		00, 70, 68, 61, 59, 37,	/*; 64  bit    BQ=1   */
		86, 77, 75, 68, 66, 00,	/*; 128 bit    BQ=2   */
		00, 68, 66, 59, 57, 37
	};			/*; 128 bit    BQ=1   */

	SiS_SearchModeID (ROMAddr, ModeNo, &modeidindex);
	SiS_SetFlag = SiS_SetFlag & (~ProgrammingCRT2);
	SiS_SelectCRT2Rate = 0;
	refreshratetableindex = SiS_GetRatePtrCRT2 (ROMAddr, ModeNo, modeidindex);	/* 11.GetRatePtr */
	if (ModeNo >= 0x13) {
		index = SiS_RefIndex[refreshratetableindex].Ext_CRTVCLK;
		index = index & 0x3F;
		VCLK = SiS_VCLKData[index].CLOCK;	/* Get VCLK  */
		index = SiS_GetReg1 (SiS_P3c4, 0x1A);
		index = index & 07;
		MCLK = SiS_MCLKData[index].CLOCK;	/* Get MCLK  */
		data2 = SiS_ModeType - 0x02;
		switch (data2) {
		case 0:
			colorth = 1;
			break;
		case 1:
			colorth = 1;
			break;
		case 2:
			colorth = 2;
			break;
		case 3:
			colorth = 2;
			break;
		case 4:
			colorth = 3;
			break;
		case 5:
			colorth = 4;
			break;
		}
		data2 = (data2 * VCLK) / MCLK;	/*  bx */

		temp = SiS_GetReg1 (SiS_P3c4, 0x14);
		temp = ((temp & 0x00FF) >> 6) << 1;
		if (temp == 0)
			temp = 1;
		temp = temp << 2;

		data2 = temp - data2;
		if (data2 % (28 * 16)) {
			data2 = data2 / (28 * 16);
			data2++;
		} else {
			data2 = data2 / (28 * 16);
		}

		index = 0;
		temp = SiS_GetReg1 (SiS_P3c4, 0x14);
		if (temp & 0x0080)
			index = index + 12;
		SiS_SetReg4 (0xcf8, 0x800000A0);
		eax = SiS_GetReg3 (0xcfc);
		temp = (USHORT) (eax >> 24);
		if (!(temp & 0x01))
			index = index + 24;

		SiS_SetReg4 (0xcf8, 0x80000050);
		eax = SiS_GetReg3 (0xcfc);
		temp = (USHORT) (eax >> 24);
		if (temp & 0x01)
			index = index + 6;
		temp = (temp & 0x0F) >> 1;
		index = index + temp;
		data = LatencyFactor[index];
		data = data + 15;
		temp = SiS_GetReg1 (SiS_P3c4, 0x14);
		if (!(temp & 0x80))
			data = data + 5;
		data = data + data2;

		SiS_SetFlag = SiS_SetFlag | ProgrammingCRT2;
		data = data * VCLK * colorth;
		if (data % (MCLK << 4)) {
			data = data / (MCLK << 4);
			data++;
		} else {
			data = data / (MCLK << 4);
		}
		temp = 0x16;
/*  Revision ID  */
		temp = 0x13;
/*  Revision ID  */
		SiS_SetRegANDOR (SiS_Part1Port, 0x01, ~0x01F, temp);
		SiS_SetRegANDOR (SiS_Part1Port, 0x02, ~0x01F, temp);
	}
}

void
SiS_SetCRT2FIFO2 (USHORT SiS_Part1Port, ULONG ROMAddr, USHORT ModeNo,
		  PSIS_HW_DEVICE_INFO HwDeviceExtension)
{
#ifdef CONFIG_FB_SIS_315
	UCHAR CombCode[] = { 1, 1, 1, 4, 3, 1, 3, 4, 4, 1, 4, 4, 5, 1, 5, 4 };
	UCHAR CRT2ThLow[] =
	    { 39, 63, 55, 79, 78, 102, 90, 114, 55, 87, 84, 116, 103, 135, 119,
		    151 };
#endif
	USHORT temp, temp1, temp2, temp3;
	USHORT index;
	USHORT CRT1ModeNo, CRT2ModeNo;
	USHORT ModeIdIndex;
	USHORT RefreshRateTableIndex;

	SiS_SetReg1 (SiS_Part1Port, 0x1, 0x3B);
/* CRT1ModeNo=(UCHAR)SiS_GetReg1(SiS_P3d4,0x34); *//* get CRT1 ModeNo */
	CRT1ModeNo = SiS_CRT1Mode;
	/* CRT1ModeNo =ModeNo; */
	SiS_SearchModeID (ROMAddr, CRT1ModeNo, &ModeIdIndex);	/* Get ModeID Table */
	SiS_SetFlag = SiS_SetFlag & (~ProgrammingCRT2);

	RefreshRateTableIndex = SiS_GetRatePtrCRT2 (ROMAddr, CRT1ModeNo, ModeIdIndex);	/* Set REFIndex-> for crt1 refreshrate */
	index =
	    SiS_GetVCLK2Ptr (ROMAddr, CRT1ModeNo, ModeIdIndex,
			     RefreshRateTableIndex, HwDeviceExtension);
	temp1 = SiS_VCLKData[index].CLOCK;	/* Get VCLK  */

	temp2 = SiS_GetColorDepth (ROMAddr, CRT1ModeNo, ModeIdIndex);
#ifdef CONFIG_FB_SIS_315
	index = SiS_Get310DRAMType (ROMAddr);
#endif
	temp3 = SiS_MCLKData[index].CLOCK;	/* Get MCLK  */

	temp = SiS_GetReg1 (SiS_P3c4, 0x14);
	if (temp & 0x02)
		temp = 16;
	else
		temp = 8;

	temp = temp - temp1 * temp2 / temp3;	/* 16-DRamBus - DCLK*BytePerPixel/MCLK */

	if ((52 * 16 % temp) == 0)
		temp = 52 * 16 / temp + 40;
	else
		temp = 52 * 16 / temp + 40 + 1;

	/* get DRAM latency */
	temp1 = (SiS_GetReg1 (SiS_P3c4, 0x17) >> 3) & 0x7;	/* SR17[5:3] DRAM Queue depth */
	temp2 = (SiS_GetReg1 (SiS_P3c4, 0x17) >> 6) & 0x3;	/* SR17[7:6] DRAM Grant length */

#ifdef CONFIG_FB_SIS_315
	if (SiS_Get310DRAMType (ROMAddr) < 2) {
		for (temp3 = 0; temp3 < 16; temp3 += 2) {
			if ((CombCode[temp3] == temp1)
			    && (CombCode[temp3 + 1] == temp2)) {
				temp3 = CRT2ThLow[temp3 >> 1];
			}
		}
	} else {
		for (temp3 = 0; temp3 < 16; temp3 += 2) {
			if ((CombCode[temp3] == temp1)
			    && (CombCode[temp3 + 1] == temp2)) {
				temp3 = CRT2ThLow[8 + (temp3 >> 1)];
			}
		}
	}
#endif

	temp += temp3;		/* CRT1 Request Period */

	CRT2ModeNo = ModeNo;	/* get CRT2 ModeNo */
	SiS_SearchModeID (ROMAddr, CRT2ModeNo, &ModeIdIndex);	/* Get ModeID Table */