/drivers/video/sis/sis_main.c

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/*
 * SiS 300/540/630[S]/730[S],
 * SiS 315[E|PRO]/550/[M]65x/[M]66x[F|M|G]X/[M]74x[GX]/330/[M]76x[GX],
 * XGI V3XT/V5/V8, Z7
 * frame buffer driver for Linux kernels >= 2.4.14 and >=2.6.3
 *
 * Copyright (C) 2001-2005 Thomas Winischhofer, Vienna, Austria.
 *
 * 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 named License,
 * or 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
 *
 * Author:	Thomas Winischhofer <thomas@winischhofer.net>
 *
 * Author of (practically wiped) code base:
 *		SiS (www.sis.com)
 *		Copyright (C) 1999 Silicon Integrated Systems, Inc.
 *
 * See http://www.winischhofer.net/ for more information and updates
 *
 * Originally based on the VBE 2.0 compliant graphic boards framebuffer driver,
 * which is (c) 1998 Gerd Knorr <kraxel@goldbach.in-berlin.de>
 *
 */

#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/kernel.h>
#include <linux/spinlock.h>
#include <linux/errno.h>
#include <linux/string.h>
#include <linux/mm.h>
#include <linux/screen_info.h>
#include <linux/slab.h>
#include <linux/fb.h>
#include <linux/selection.h>
#include <linux/ioport.h>
#include <linux/init.h>
#include <linux/pci.h>
#include <linux/vmalloc.h>
#include <linux/capability.h>
#include <linux/fs.h>
#include <linux/types.h>
#include <linux/uaccess.h>
#include <asm/io.h>
#ifdef CONFIG_MTRR
#include <asm/mtrr.h>
#endif

#include "sis.h"
#include "sis_main.h"

#if !defined(CONFIG_FB_SIS_300) && !defined(CONFIG_FB_SIS_315)
#warning Neither CONFIG_FB_SIS_300 nor CONFIG_FB_SIS_315 is set
#warning sisfb will not work!
#endif

static void sisfb_handle_command(struct sis_video_info *ivideo,
				 struct sisfb_cmd *sisfb_command);

/* ------------------ Internal helper routines ----------------- */

static void __init
sisfb_setdefaultparms(void)
{
	sisfb_off		= 0;
	sisfb_parm_mem		= 0;
	sisfb_accel		= -1;
	sisfb_ypan		= -1;
	sisfb_max		= -1;
	sisfb_userom		= -1;
	sisfb_useoem		= -1;
	sisfb_mode_idx		= -1;
	sisfb_parm_rate		= -1;
	sisfb_crt1off		= 0;
	sisfb_forcecrt1		= -1;
	sisfb_crt2type		= -1;
	sisfb_crt2flags		= 0;
	sisfb_pdc		= 0xff;
	sisfb_pdca		= 0xff;
	sisfb_scalelcd		= -1;
	sisfb_specialtiming 	= CUT_NONE;
	sisfb_lvdshl		= -1;
	sisfb_dstn		= 0;
	sisfb_fstn		= 0;
	sisfb_tvplug		= -1;
	sisfb_tvstd		= -1;
	sisfb_tvxposoffset	= 0;
	sisfb_tvyposoffset	= 0;
	sisfb_nocrt2rate	= 0;
#if !defined(__i386__) && !defined(__x86_64__)
	sisfb_resetcard		= 0;
	sisfb_videoram		= 0;
#endif
}

/* ------------- Parameter parsing -------------- */

static void __devinit
sisfb_search_vesamode(unsigned int vesamode, bool quiet)
{
	int i = 0, j = 0;

	/* We don't know the hardware specs yet and there is no ivideo */

	if(vesamode == 0) {
		if(!quiet)
			printk(KERN_ERR "sisfb: Invalid mode. Using default.\n");

		sisfb_mode_idx = DEFAULT_MODE;

		return;
	}

	vesamode &= 0x1dff;  /* Clean VESA mode number from other flags */

	while(sisbios_mode[i++].mode_no[0] != 0) {
		if( (sisbios_mode[i-1].vesa_mode_no_1 == vesamode) ||
		    (sisbios_mode[i-1].vesa_mode_no_2 == vesamode) ) {
			if(sisfb_fstn) {
				if(sisbios_mode[i-1].mode_no[1] == 0x50 ||
				   sisbios_mode[i-1].mode_no[1] == 0x56 ||
				   sisbios_mode[i-1].mode_no[1] == 0x53)
					continue;
			} else {
				if(sisbios_mode[i-1].mode_no[1] == 0x5a ||
				   sisbios_mode[i-1].mode_no[1] == 0x5b)
					continue;
			}
			sisfb_mode_idx = i - 1;
			j = 1;
			break;
		}
	}
	if((!j) && !quiet)
		printk(KERN_ERR "sisfb: Invalid VESA mode 0x%x'\n", vesamode);
}

static void __devinit
sisfb_search_mode(char *name, bool quiet)
{
	unsigned int j = 0, xres = 0, yres = 0, depth = 0, rate = 0;
	int i = 0;
	char strbuf[16], strbuf1[20];
	char *nameptr = name;

	/* We don't know the hardware specs yet and there is no ivideo */

	if(name == NULL) {
		if(!quiet)
			printk(KERN_ERR "sisfb: Internal error, using default mode.\n");

		sisfb_mode_idx = DEFAULT_MODE;
		return;
	}

	if(!strnicmp(name, sisbios_mode[MODE_INDEX_NONE].name, strlen(name))) {
		if(!quiet)
			printk(KERN_ERR "sisfb: Mode 'none' not supported anymore. Using default.\n");

		sisfb_mode_idx = DEFAULT_MODE;
		return;
	}

	if(strlen(name) <= 19) {
		strcpy(strbuf1, name);
		for(i = 0; i < strlen(strbuf1); i++) {
			if(strbuf1[i] < '0' || strbuf1[i] > '9') strbuf1[i] = ' ';
		}

		/* This does some fuzzy mode naming detection */
		if(sscanf(strbuf1, "%u %u %u %u", &xres, &yres, &depth, &rate) == 4) {
			if((rate <= 32) || (depth > 32)) {
				j = rate; rate = depth; depth = j;
			}
			sprintf(strbuf, "%ux%ux%u", xres, yres, depth);
			nameptr = strbuf;
			sisfb_parm_rate = rate;
		} else if(sscanf(strbuf1, "%u %u %u", &xres, &yres, &depth) == 3) {
			sprintf(strbuf, "%ux%ux%u", xres, yres, depth);
			nameptr = strbuf;
		} else {
			xres = 0;
			if((sscanf(strbuf1, "%u %u", &xres, &yres) == 2) && (xres != 0)) {
				sprintf(strbuf, "%ux%ux8", xres, yres);
				nameptr = strbuf;
			} else {
				sisfb_search_vesamode(simple_strtoul(name, NULL, 0), quiet);
				return;
			}
		}
	}

	i = 0; j = 0;
	while(sisbios_mode[i].mode_no[0] != 0) {
		if(!strnicmp(nameptr, sisbios_mode[i++].name, strlen(nameptr))) {
			if(sisfb_fstn) {
				if(sisbios_mode[i-1].mode_no[1] == 0x50 ||
				   sisbios_mode[i-1].mode_no[1] == 0x56 ||
				   sisbios_mode[i-1].mode_no[1] == 0x53)
					continue;
			} else {
				if(sisbios_mode[i-1].mode_no[1] == 0x5a ||
				   sisbios_mode[i-1].mode_no[1] == 0x5b)
					continue;
			}
			sisfb_mode_idx = i - 1;
			j = 1;
			break;
		}
	}

	if((!j) && !quiet)
		printk(KERN_ERR "sisfb: Invalid mode '%s'\n", nameptr);
}

#ifndef MODULE
static void __devinit
sisfb_get_vga_mode_from_kernel(void)
{
#ifdef CONFIG_X86
	char mymode[32];
	int  mydepth = screen_info.lfb_depth;

	if(screen_info.orig_video_isVGA != VIDEO_TYPE_VLFB) return;

	if( (screen_info.lfb_width >= 320) && (screen_info.lfb_width <= 2048) &&
	    (screen_info.lfb_height >= 200) && (screen_info.lfb_height <= 1536) &&
	    (mydepth >= 8) && (mydepth <= 32) ) {

		if(mydepth == 24) mydepth = 32;

		sprintf(mymode, "%ux%ux%u", screen_info.lfb_width,
					screen_info.lfb_height,
					mydepth);

		printk(KERN_DEBUG
			"sisfb: Using vga mode %s pre-set by kernel as default\n",
			mymode);

		sisfb_search_mode(mymode, true);
	}
#endif
	return;
}
#endif

static void __init
sisfb_search_crt2type(const char *name)
{
	int i = 0;

	/* We don't know the hardware specs yet and there is no ivideo */

	if(name == NULL) return;

	while(sis_crt2type[i].type_no != -1) {
		if(!strnicmp(name, sis_crt2type[i].name, strlen(sis_crt2type[i].name))) {
			sisfb_crt2type = sis_crt2type[i].type_no;
			sisfb_tvplug = sis_crt2type[i].tvplug_no;
			sisfb_crt2flags = sis_crt2type[i].flags;
			break;
		}
		i++;
	}

	sisfb_dstn = (sisfb_crt2flags & FL_550_DSTN) ? 1 : 0;
	sisfb_fstn = (sisfb_crt2flags & FL_550_FSTN) ? 1 : 0;

	if(sisfb_crt2type < 0)
		printk(KERN_ERR "sisfb: Invalid CRT2 type: %s\n", name);
}

static void __init
sisfb_search_tvstd(const char *name)
{
	int i = 0;

	/* We don't know the hardware specs yet and there is no ivideo */

	if(name == NULL)
		return;

	while(sis_tvtype[i].type_no != -1) {
		if(!strnicmp(name, sis_tvtype[i].name, strlen(sis_tvtype[i].name))) {
			sisfb_tvstd = sis_tvtype[i].type_no;
			break;
		}
		i++;
	}
}

static void __init
sisfb_search_specialtiming(const char *name)
{
	int i = 0;
	bool found = false;

	/* We don't know the hardware specs yet and there is no ivideo */

	if(name == NULL)
		return;

	if(!strnicmp(name, "none", 4)) {
		sisfb_specialtiming = CUT_FORCENONE;
		printk(KERN_DEBUG "sisfb: Special timing disabled\n");
	} else {
		while(mycustomttable[i].chipID != 0) {
			if(!strnicmp(name,mycustomttable[i].optionName,
			   strlen(mycustomttable[i].optionName))) {
				sisfb_specialtiming = mycustomttable[i].SpecialID;
				found = true;
				printk(KERN_INFO "sisfb: Special timing for %s %s forced (\"%s\")\n",
					mycustomttable[i].vendorName,
					mycustomttable[i].cardName,
					mycustomttable[i].optionName);
				break;
			}
			i++;
		}
		if(!found) {
			printk(KERN_WARNING "sisfb: Invalid SpecialTiming parameter, valid are:");
			printk(KERN_WARNING "\t\"none\" (to disable special timings)\n");
			i = 0;
			while(mycustomttable[i].chipID != 0) {
				printk(KERN_WARNING "\t\"%s\" (for %s %s)\n",
					mycustomttable[i].optionName,
					mycustomttable[i].vendorName,
					mycustomttable[i].cardName);
				i++;
			}
		}
	}
}

/* ----------- Various detection routines ----------- */

static void __devinit
sisfb_detect_custom_timing(struct sis_video_info *ivideo)
{
	unsigned char *biosver = NULL;
	unsigned char *biosdate = NULL;
	bool footprint;
	u32 chksum = 0;
	int i, j;

	if(ivideo->SiS_Pr.UseROM) {
		biosver = ivideo->SiS_Pr.VirtualRomBase + 0x06;
		biosdate = ivideo->SiS_Pr.VirtualRomBase + 0x2c;
		for(i = 0; i < 32768; i++)
			chksum += ivideo->SiS_Pr.VirtualRomBase[i];
	}

	i = 0;
	do {
		if( (mycustomttable[i].chipID == ivideo->chip)			&&
		    ((!strlen(mycustomttable[i].biosversion)) ||
		     (ivideo->SiS_Pr.UseROM &&
		      (!strncmp(mycustomttable[i].biosversion, biosver,
				strlen(mycustomttable[i].biosversion)))))	&&
		    ((!strlen(mycustomttable[i].biosdate)) ||
		     (ivideo->SiS_Pr.UseROM &&
		      (!strncmp(mycustomttable[i].biosdate, biosdate,
				strlen(mycustomttable[i].biosdate)))))		&&
		    ((!mycustomttable[i].bioschksum) ||
		     (ivideo->SiS_Pr.UseROM &&
		      (mycustomttable[i].bioschksum == chksum)))		&&
		    (mycustomttable[i].pcisubsysvendor == ivideo->subsysvendor) &&
		    (mycustomttable[i].pcisubsyscard == ivideo->subsysdevice) ) {
			footprint = true;
			for(j = 0; j < 5; j++) {
				if(mycustomttable[i].biosFootprintAddr[j]) {
					if(ivideo->SiS_Pr.UseROM) {
						if(ivideo->SiS_Pr.VirtualRomBase[mycustomttable[i].biosFootprintAddr[j]] !=
							mycustomttable[i].biosFootprintData[j]) {
							footprint = false;
						}
					} else
						footprint = false;
				}
			}
			if(footprint) {
				ivideo->SiS_Pr.SiS_CustomT = mycustomttable[i].SpecialID;
				printk(KERN_DEBUG "sisfb: Identified [%s %s], special timing applies\n",
					mycustomttable[i].vendorName,
				mycustomttable[i].cardName);
				printk(KERN_DEBUG "sisfb: [specialtiming parameter name: %s]\n",
					mycustomttable[i].optionName);
				break;
			}
		}
		i++;
	} while(mycustomttable[i].chipID);
}

static bool __devinit
sisfb_interpret_edid(struct sisfb_monitor *monitor, u8 *buffer)
{
	int i, j, xres, yres, refresh, index;
	u32 emodes;

	if(buffer[0] != 0x00 || buffer[1] != 0xff ||
	   buffer[2] != 0xff || buffer[3] != 0xff ||
	   buffer[4] != 0xff || buffer[5] != 0xff ||
	   buffer[6] != 0xff || buffer[7] != 0x00) {
		printk(KERN_DEBUG "sisfb: Bad EDID header\n");
		return false;
	}

	if(buffer[0x12] != 0x01) {
		printk(KERN_INFO "sisfb: EDID version %d not supported\n",
			buffer[0x12]);
		return false;
	}

	monitor->feature = buffer[0x18];

	if(!(buffer[0x14] & 0x80)) {
		if(!(buffer[0x14] & 0x08)) {
			printk(KERN_INFO
				"sisfb: WARNING: Monitor does not support separate syncs\n");
		}
	}

	if(buffer[0x13] >= 0x01) {
	   /* EDID V1 rev 1 and 2: Search for monitor descriptor
	    * to extract ranges
	    */
	    j = 0x36;
	    for(i=0; i<4; i++) {
	       if(buffer[j]     == 0x00 && buffer[j + 1] == 0x00 &&
		  buffer[j + 2] == 0x00 && buffer[j + 3] == 0xfd &&
		  buffer[j + 4] == 0x00) {
		  monitor->hmin = buffer[j + 7];
		  monitor->hmax = buffer[j + 8];
		  monitor->vmin = buffer[j + 5];
		  monitor->vmax = buffer[j + 6];
		  monitor->dclockmax = buffer[j + 9] * 10 * 1000;
		  monitor->datavalid = true;
		  break;
	       }
	       j += 18;
	    }
	}

	if(!monitor->datavalid) {
	   /* Otherwise: Get a range from the list of supported
	    * Estabished Timings. This is not entirely accurate,
	    * because fixed frequency monitors are not supported
	    * that way.
	    */
	   monitor->hmin = 65535; monitor->hmax = 0;
	   monitor->vmin = 65535; monitor->vmax = 0;
	   monitor->dclockmax = 0;
	   emodes = buffer[0x23] | (buffer[0x24] << 8) | (buffer[0x25] << 16);
	   for(i = 0; i < 13; i++) {
	      if(emodes & sisfb_ddcsmodes[i].mask) {
		 if(monitor->hmin > sisfb_ddcsmodes[i].h) monitor->hmin = sisfb_ddcsmodes[i].h;
		 if(monitor->hmax < sisfb_ddcsmodes[i].h) monitor->hmax = sisfb_ddcsmodes[i].h + 1;
		 if(monitor->vmin > sisfb_ddcsmodes[i].v) monitor->vmin = sisfb_ddcsmodes[i].v;
		 if(monitor->vmax < sisfb_ddcsmodes[i].v) monitor->vmax = sisfb_ddcsmodes[i].v;
		 if(monitor->dclockmax < sisfb_ddcsmodes[i].d) monitor->dclockmax = sisfb_ddcsmodes[i].d;
	      }
	   }
	   index = 0x26;
	   for(i = 0; i < 8; i++) {
	      xres = (buffer[index] + 31) * 8;
	      switch(buffer[index + 1] & 0xc0) {
		 case 0xc0: yres = (xres * 9) / 16; break;
		 case 0x80: yres = (xres * 4) /  5; break;
		 case 0x40: yres = (xres * 3) /  4; break;
		 default:   yres = xres;	    break;
	      }
	      refresh = (buffer[index + 1] & 0x3f) + 60;
	      if((xres >= 640) && (yres >= 480)) {
		 for(j = 0; j < 8; j++) {
		    if((xres == sisfb_ddcfmodes[j].x) &&
		       (yres == sisfb_ddcfmodes[j].y) &&
		       (refresh == sisfb_ddcfmodes[j].v)) {
		      if(monitor->hmin > sisfb_ddcfmodes[j].h) monitor->hmin = sisfb_ddcfmodes[j].h;
		      if(monitor->hmax < sisfb_ddcfmodes[j].h) monitor->hmax = sisfb_ddcfmodes[j].h + 1;
		      if(monitor->vmin > sisfb_ddcsmodes[j].v) monitor->vmin = sisfb_ddcsmodes[j].v;
		      if(monitor->vmax < sisfb_ddcsmodes[j].v) monitor->vmax = sisfb_ddcsmodes[j].v;
		      if(monitor->dclockmax < sisfb_ddcsmodes[j].d) monitor->dclockmax = sisfb_ddcsmodes[j].d;
		    }
		 }
	      }
	      index += 2;
	   }
	   if((monitor->hmin <= monitor->hmax) && (monitor->vmin <= monitor->vmax)) {
	      monitor->datavalid = true;
	   }
	}

	return monitor->datavalid;
}

static void __devinit
sisfb_handle_ddc(struct sis_video_info *ivideo, struct sisfb_monitor *monitor, int crtno)
{
	unsigned short temp, i, realcrtno = crtno;
	unsigned char  buffer[256];

	monitor->datavalid = false;

	if(crtno) {
	   if(ivideo->vbflags & CRT2_LCD)      realcrtno = 1;
	   else if(ivideo->vbflags & CRT2_VGA) realcrtno = 2;
	   else return;
	}

	if((ivideo->sisfb_crt1off) && (!crtno))
		return;

	temp = SiS_HandleDDC(&ivideo->SiS_Pr, ivideo->vbflags, ivideo->sisvga_engine,
				realcrtno, 0, &buffer[0], ivideo->vbflags2);
	if((!temp) || (temp == 0xffff)) {
	   printk(KERN_INFO "sisfb: CRT%d DDC probing failed\n", crtno + 1);
	   return;
	} else {
	   printk(KERN_INFO "sisfb: CRT%d DDC supported\n", crtno + 1);
	   printk(KERN_INFO "sisfb: CRT%d DDC level: %s%s%s%s\n",
		crtno + 1,
		(temp & 0x1a) ? "" : "[none of the supported]",
		(temp & 0x02) ? "2 " : "",
		(temp & 0x08) ? "D&P" : "",
		(temp & 0x10) ? "FPDI-2" : "");
	   if(temp & 0x02) {
	      i = 3;  /* Number of retrys */
	      do {
		 temp = SiS_HandleDDC(&ivideo->SiS_Pr, ivideo->vbflags, ivideo->sisvga_engine,
				     realcrtno, 1, &buffer[0], ivideo->vbflags2);
	      } while((temp) && i--);
	      if(!temp) {
		 if(sisfb_interpret_edid(monitor, &buffer[0])) {
		    printk(KERN_INFO "sisfb: Monitor range H %d-%dKHz, V %d-%dHz, Max. dotclock %dMHz\n",
			monitor->hmin, monitor->hmax, monitor->vmin, monitor->vmax,
			monitor->dclockmax / 1000);
		 } else {
		    printk(KERN_INFO "sisfb: CRT%d DDC EDID corrupt\n", crtno + 1);
		 }
	      } else {
		 printk(KERN_INFO "sisfb: CRT%d DDC reading failed\n", crtno + 1);
	      }
	   } else {
	      printk(KERN_INFO "sisfb: VESA D&P and FPDI-2 not supported yet\n");
	   }
	}
}

/* -------------- Mode validation --------------- */

static bool
sisfb_verify_rate(struct sis_video_info *ivideo, struct sisfb_monitor *monitor,
		int mode_idx, int rate_idx, int rate)
{
	int htotal, vtotal;
	unsigned int dclock, hsync;

	if(!monitor->datavalid)
		return true;

	if(mode_idx < 0)
		return false;

	/* Skip for 320x200, 320x240, 640x400 */
	switch(sisbios_mode[mode_idx].mode_no[ivideo->mni]) {
	case 0x59:
	case 0x41:
	case 0x4f:
	case 0x50:
	case 0x56:
	case 0x53:
	case 0x2f:
	case 0x5d:
	case 0x5e:
		return true;
#ifdef CONFIG_FB_SIS_315
	case 0x5a:
	case 0x5b:
		if(ivideo->sisvga_engine == SIS_315_VGA) return true;
#endif
	}

	if(rate < (monitor->vmin - 1))
		return false;
	if(rate > (monitor->vmax + 1))
		return false;

	if(sisfb_gettotalfrommode(&ivideo->SiS_Pr,
				  sisbios_mode[mode_idx].mode_no[ivideo->mni],
				  &htotal, &vtotal, rate_idx)) {
		dclock = (htotal * vtotal * rate) / 1000;
		if(dclock > (monitor->dclockmax + 1000))
			return false;
		hsync = dclock / htotal;
		if(hsync < (monitor->hmin - 1))
			return false;
		if(hsync > (monitor->hmax + 1))
			return false;
        } else {
		return false;
	}
	return true;
}

static int
sisfb_validate_mode(struct sis_video_info *ivideo, int myindex, u32 vbflags)
{
	u16 xres=0, yres, myres;

#ifdef CONFIG_FB_SIS_300
	if(ivideo->sisvga_engine == SIS_300_VGA) {
		if(!(sisbios_mode[myindex].chipset & MD_SIS300))
			return -1 ;
	}
#endif
#ifdef CONFIG_FB_SIS_315
	if(ivideo->sisvga_engine == SIS_315_VGA) {
		if(!(sisbios_mode[myindex].chipset & MD_SIS315))
			return -1;
	}
#endif

	myres = sisbios_mode[myindex].yres;

	switch(vbflags & VB_DISPTYPE_DISP2) {

	case CRT2_LCD:
		xres = ivideo->lcdxres; yres = ivideo->lcdyres;

		if((ivideo->SiS_Pr.SiS_CustomT != CUT_PANEL848) &&
		   (ivideo->SiS_Pr.SiS_CustomT != CUT_PANEL856)) {
			if(sisbios_mode[myindex].xres > xres)
				return -1;
			if(myres > yres)
				return -1;
		}

		if(ivideo->sisfb_fstn) {
			if(sisbios_mode[myindex].xres == 320) {
				if(myres == 240) {
					switch(sisbios_mode[myindex].mode_no[1]) {
						case 0x50: myindex = MODE_FSTN_8;  break;
						case 0x56: myindex = MODE_FSTN_16; break;
						case 0x53: return -1;
					}
				}
			}
		}

		if(SiS_GetModeID_LCD(ivideo->sisvga_engine, vbflags, sisbios_mode[myindex].xres,
			 	sisbios_mode[myindex].yres, 0, ivideo->sisfb_fstn,
			 	ivideo->SiS_Pr.SiS_CustomT, xres, yres, ivideo->vbflags2) < 0x14) {
			return -1;
		}
		break;

	case CRT2_TV:
		if(SiS_GetModeID_TV(ivideo->sisvga_engine, vbflags, sisbios_mode[myindex].xres,
				sisbios_mode[myindex].yres, 0, ivideo->vbflags2) < 0x14) {
			return -1;
		}
		break;

	case CRT2_VGA:
		if(SiS_GetModeID_VGA2(ivideo->sisvga_engine, vbflags, sisbios_mode[myindex].xres,
				sisbios_mode[myindex].yres, 0, ivideo->vbflags2) < 0x14) {
			return -1;
		}
		break;
	}

	return myindex;
}

static u8
sisfb_search_refresh_rate(struct sis_video_info *ivideo, unsigned int rate, int mode_idx)
{
	int i = 0;
	u16 xres = sisbios_mode[mode_idx].xres;
	u16 yres = sisbios_mode[mode_idx].yres;

	ivideo->rate_idx = 0;
	while((sisfb_vrate[i].idx != 0) && (sisfb_vrate[i].xres <= xres)) {
		if((sisfb_vrate[i].xres == xres) && (sisfb_vrate[i].yres == yres)) {
			if(sisfb_vrate[i].refresh == rate) {
				ivideo->rate_idx = sisfb_vrate[i].idx;
				break;
			} else if(sisfb_vrate[i].refresh > rate) {
				if((sisfb_vrate[i].refresh - rate) <= 3) {
					DPRINTK("sisfb: Adjusting rate from %d up to %d\n",
						rate, sisfb_vrate[i].refresh);
					ivideo->rate_idx = sisfb_vrate[i].idx;
					ivideo->refresh_rate = sisfb_vrate[i].refresh;
				} else if((sisfb_vrate[i].idx != 1) &&
						((rate - sisfb_vrate[i-1].refresh) <= 2)) {
					DPRINTK("sisfb: Adjusting rate from %d down to %d\n",
						rate, sisfb_vrate[i-1].refresh);
					ivideo->rate_idx = sisfb_vrate[i-1].idx;
					ivideo->refresh_rate = sisfb_vrate[i-1].refresh;
				}
				break;
			} else if((rate - sisfb_vrate[i].refresh) <= 2) {
				DPRINTK("sisfb: Adjusting rate from %d down to %d\n",
						rate, sisfb_vrate[i].refresh);
				ivideo->rate_idx = sisfb_vrate[i].idx;
				break;
			}
		}
		i++;
	}
	if(ivideo->rate_idx > 0) {
		return ivideo->rate_idx;
	} else {
		printk(KERN_INFO "sisfb: Unsupported rate %d for %dx%d\n",
				rate, xres, yres);
		return 0;
	}
}

static bool
sisfb_bridgeisslave(struct sis_video_info *ivideo)
{
	unsigned char P1_00;

	if(!(ivideo->vbflags2 & VB2_VIDEOBRIDGE))
		return false;

	P1_00 = SiS_GetReg(SISPART1, 0x00);
	if( ((ivideo->sisvga_engine == SIS_300_VGA) && (P1_00 & 0xa0) == 0x20) ||
	    ((ivideo->sisvga_engine == SIS_315_VGA) && (P1_00 & 0x50) == 0x10) ) {
		return true;
	} else {
		return false;
	}
}

static bool
sisfballowretracecrt1(struct sis_video_info *ivideo)
{
	u8 temp;

	temp = SiS_GetReg(SISCR, 0x17);
	if(!(temp & 0x80))
		return false;

	temp = SiS_GetReg(SISSR, 0x1f);
	if(temp & 0xc0)
		return false;

	return true;
}

static bool
sisfbcheckvretracecrt1(struct sis_video_info *ivideo)
{
	if(!sisfballowretracecrt1(ivideo))
		return false;

	if (SiS_GetRegByte(SISINPSTAT) & 0x08)
		return true;
	else
		return false;
}

static void
sisfbwaitretracecrt1(struct sis_video_info *ivideo)
{
	int watchdog;

	if(!sisfballowretracecrt1(ivideo))
		return;

	watchdog = 65536;
	while ((!(SiS_GetRegByte(SISINPSTAT) & 0x08)) && --watchdog);
	watchdog = 65536;
	while ((SiS_GetRegByte(SISINPSTAT) & 0x08) && --watchdog);
}

static bool
sisfbcheckvretracecrt2(struct sis_video_info *ivideo)
{
	unsigned char temp, reg;

	switch(ivideo->sisvga_engine) {
	case SIS_300_VGA: reg = 0x25; break;
	case SIS_315_VGA: reg = 0x30; break;
	default:	  return false;
	}

	temp = SiS_GetReg(SISPART1, reg);
	if(temp & 0x02)
		return true;
	else
		return false;
}

static bool
sisfb_CheckVBRetrace(struct sis_video_info *ivideo)
{
	if(ivideo->currentvbflags & VB_DISPTYPE_DISP2) {
		if(!sisfb_bridgeisslave(ivideo)) {
			return sisfbcheckvretracecrt2(ivideo);
		}
	}
	return sisfbcheckvretracecrt1(ivideo);
}

static u32
sisfb_setupvbblankflags(struct sis_video_info *ivideo, u32 *vcount, u32 *hcount)
{
	u8 idx, reg1, reg2, reg3, reg4;
	u32 ret = 0;

	(*vcount) = (*hcount) = 0;

	if((ivideo->currentvbflags & VB_DISPTYPE_DISP2) && (!(sisfb_bridgeisslave(ivideo)))) {

		ret |= (FB_VBLANK_HAVE_VSYNC  |
			FB_VBLANK_HAVE_HBLANK |
			FB_VBLANK_HAVE_VBLANK |
			FB_VBLANK_HAVE_VCOUNT |
			FB_VBLANK_HAVE_HCOUNT);
		switch(ivideo->sisvga_engine) {
			case SIS_300_VGA: idx = 0x25; break;
			default:
			case SIS_315_VGA: idx = 0x30; break;
		}
		reg1 = SiS_GetReg(SISPART1, (idx+0)); /* 30 */
		reg2 = SiS_GetReg(SISPART1, (idx+1)); /* 31 */
		reg3 = SiS_GetReg(SISPART1, (idx+2)); /* 32 */
		reg4 = SiS_GetReg(SISPART1, (idx+3)); /* 33 */
		if(reg1 & 0x01) ret |= FB_VBLANK_VBLANKING;
		if(reg1 & 0x02) ret |= FB_VBLANK_VSYNCING;
		if(reg4 & 0x80) ret |= FB_VBLANK_HBLANKING;
		(*vcount) = reg3 | ((reg4 & 0x70) << 4);
		(*hcount) = reg2 | ((reg4 & 0x0f) << 8);

	} else if(sisfballowretracecrt1(ivideo)) {

		ret |= (FB_VBLANK_HAVE_VSYNC  |
			FB_VBLANK_HAVE_VBLANK |
			FB_VBLANK_HAVE_VCOUNT |
			FB_VBLANK_HAVE_HCOUNT);
		reg1 = SiS_GetRegByte(SISINPSTAT);
		if(reg1 & 0x08) ret |= FB_VBLANK_VSYNCING;
		if(reg1 & 0x01) ret |= FB_VBLANK_VBLANKING;
		reg1 = SiS_GetReg(SISCR, 0x20);
		reg1 = SiS_GetReg(SISCR, 0x1b);
		reg2 = SiS_GetReg(SISCR, 0x1c);
		reg3 = SiS_GetReg(SISCR, 0x1d);
		(*vcount) = reg2 | ((reg3 & 0x07) << 8);
		(*hcount) = (reg1 | ((reg3 & 0x10) << 4)) << 3;
	}

	return ret;
}

static int
sisfb_myblank(struct sis_video_info *ivideo, int blank)
{
	u8 sr01, sr11, sr1f, cr63=0, p2_0, p1_13;
	bool backlight = true;

	switch(blank) {
		case FB_BLANK_UNBLANK:	/* on */
			sr01  = 0x00;
			sr11  = 0x00;
			sr1f  = 0x00;
			cr63  = 0x00;
			p2_0  = 0x20;
			p1_13 = 0x00;
			backlight = true;
			break;
		case FB_BLANK_NORMAL:	/* blank */
			sr01  = 0x20;
			sr11  = 0x00;
			sr1f  = 0x00;
			cr63  = 0x00;
			p2_0  = 0x20;
			p1_13 = 0x00;
			backlight = true;
			break;
		case FB_BLANK_VSYNC_SUSPEND:	/* no vsync */
			sr01  = 0x20;
			sr11  = 0x08;
			sr1f  = 0x80;
			cr63  = 0x40;
			p2_0  = 0x40;
			p1_13 = 0x80;
			backlight = false;
			break;
		case FB_BLANK_HSYNC_SUSPEND:	/* no hsync */
			sr01  = 0x20;
			sr11  = 0x08;
			sr1f  = 0x40;
			cr63  = 0x40;
			p2_0  = 0x80;
			p1_13 = 0x40;
			backlight = false;
			break;
		case FB_BLANK_POWERDOWN:	/* off */
			sr01  = 0x20;
			sr11  = 0x08;
			sr1f  = 0xc0;
			cr63  = 0x40;
			p2_0  = 0xc0;
			p1_13 = 0xc0;
			backlight = false;
			break;
		default:
			return 1;
	}

	if(ivideo->currentvbflags & VB_DISPTYPE_CRT1) {

		if( (!ivideo->sisfb_thismonitor.datavalid) ||
		    ((ivideo->sisfb_thismonitor.datavalid) &&
		     (ivideo->sisfb_thismonitor.feature & 0xe0))) {

			if(ivideo->sisvga_engine == SIS_315_VGA) {
				SiS_SetRegANDOR(SISCR, ivideo->SiS_Pr.SiS_MyCR63, 0xbf, cr63);
			}

			if(!(sisfb_bridgeisslave(ivideo))) {
				SiS_SetRegANDOR(SISSR, 0x01, ~0x20, sr01);
				SiS_SetRegANDOR(SISSR, 0x1f, 0x3f, sr1f);
			}
		}

	}

	if(ivideo->currentvbflags & CRT2_LCD) {

		if(ivideo->vbflags2 & VB2_SISLVDSBRIDGE) {
			if(backlight) {
				SiS_SiS30xBLOn(&ivideo->SiS_Pr);
			} else {
				SiS_SiS30xBLOff(&ivideo->SiS_Pr);
			}
		} else if(ivideo->sisvga_engine == SIS_315_VGA) {
#ifdef CONFIG_FB_SIS_315
			if(ivideo->vbflags2 & VB2_CHRONTEL) {
				if(backlight) {
					SiS_Chrontel701xBLOn(&ivideo->SiS_Pr);
				} else {
					SiS_Chrontel701xBLOff(&ivideo->SiS_Pr);
				}
			}
#endif
		}

		if(((ivideo->sisvga_engine == SIS_300_VGA) &&
		    (ivideo->vbflags2 & (VB2_301|VB2_30xBDH|VB2_LVDS))) ||
		   ((ivideo->sisvga_engine == SIS_315_VGA) &&
		    ((ivideo->vbflags2 & (VB2_LVDS | VB2_CHRONTEL)) == VB2_LVDS))) {
			SiS_SetRegANDOR(SISSR, 0x11, ~0x0c, sr11);
		}

		if(ivideo->sisvga_engine == SIS_300_VGA) {
			if((ivideo->vbflags2 & VB2_30xB) &&
			   (!(ivideo->vbflags2 & VB2_30xBDH))) {
				SiS_SetRegANDOR(SISPART1, 0x13, 0x3f, p1_13);
			}
		} else if(ivideo->sisvga_engine == SIS_315_VGA) {
			if((ivideo->vbflags2 & VB2_30xB) &&
			   (!(ivideo->vbflags2 & VB2_30xBDH))) {
				SiS_SetRegANDOR(SISPART2, 0x00, 0x1f, p2_0);
			}
		}

	} else if(ivideo->currentvbflags & CRT2_VGA) {

		if(ivideo->vbflags2 & VB2_30xB) {
			SiS_SetRegANDOR(SISPART2, 0x00, 0x1f, p2_0);
		}

	}

	return 0;
}

/* ------------- Callbacks from init.c/init301.c  -------------- */

#ifdef CONFIG_FB_SIS_300
unsigned int
sisfb_read_nbridge_pci_dword(struct SiS_Private *SiS_Pr, int reg)
{
   struct sis_video_info *ivideo = (struct sis_video_info *)SiS_Pr->ivideo;
   u32 val = 0;

   pci_read_config_dword(ivideo->nbridge, reg, &val);
   return (unsigned int)val;
}

void
sisfb_write_nbridge_pci_dword(struct SiS_Private *SiS_Pr, int reg, unsigned int val)
{
   struct sis_video_info *ivideo = (struct sis_video_info *)SiS_Pr->ivideo;

   pci_write_config_dword(ivideo->nbridge, reg, (u32)val);
}

unsigned int
sisfb_read_lpc_pci_dword(struct SiS_Private *SiS_Pr, int reg)
{
   struct sis_video_info *ivideo = (struct sis_video_info *)SiS_Pr->ivideo;
   u32 val = 0;

   if(!ivideo->lpcdev) return 0;

   pci_read_config_dword(ivideo->lpcdev, reg, &val);
   return (unsigned int)val;
}
#endif

#ifdef CONFIG_FB_SIS_315
void
sisfb_write_nbridge_pci_byte(struct SiS_Private *SiS_Pr, int reg, unsigned char val)
{
   struct sis_video_info *ivideo = (struct sis_video_info *)SiS_Pr->ivideo;

   pci_write_config_byte(ivideo->nbridge, reg, (u8)val);
}

unsigned int
sisfb_read_mio_pci_word(struct SiS_Private *SiS_Pr, int reg)
{
   struct sis_video_info *ivideo = (struct sis_video_info *)SiS_Pr->ivideo;
   u16 val = 0;

   if(!ivideo->lpcdev) return 0;

   pci_read_config_word(ivideo->lpcdev, reg, &val);
   return (unsigned int)val;
}
#endif

/* ----------- FBDev related routines for all series ----------- */

static int
sisfb_get_cmap_len(const struct fb_var_screeninfo *var)
{
	return (var->bits_per_pixel == 8) ? 256 : 16;
}

static void
sisfb_set_vparms(struct sis_video_info *ivideo)
{
	switch(ivideo->video_bpp) {
	case 8:
		ivideo->DstColor = 0x0000;
		ivideo->SiS310_AccelDepth = 0x00000000;
		ivideo->video_cmap_len = 256;
		break;
	case 16:
		ivideo->DstColor = 0x8000;
		ivideo->SiS310_AccelDepth = 0x00010000;
		ivideo->video_cmap_len = 16;
		break;
	case 32:
		ivideo->DstColor = 0xC000;
		ivideo->SiS310_AccelDepth = 0x00020000;
		ivideo->video_cmap_len = 16;
		break;
	default:
		ivideo->video_cmap_len = 16;
		printk(KERN_ERR "sisfb: Unsupported depth %d", ivideo->video_bpp);
		ivideo->accel = 0;
	}
}

static int
sisfb_calc_maxyres(struct sis_video_info *ivideo, struct fb_var_screeninfo *var)
{
	int maxyres = ivideo->sisfb_mem / (var->xres_virtual * (var->bits_per_pixel >> 3));

	if(maxyres > 32767) maxyres = 32767;

	return maxyres;
}

static void
sisfb_calc_pitch(struct sis_video_info *ivideo, struct fb_var_screeninfo *var)
{
	ivideo->video_linelength = var->xres_virtual * (var->bits_per_pixel >> 3);
	ivideo->scrnpitchCRT1 = ivideo->video_linelength;
	if(!(ivideo->currentvbflags & CRT1_LCDA)) {
		if((var->vmode & FB_VMODE_MASK) == FB_VMODE_INTERLACED) {
			ivideo->scrnpitchCRT1 <<= 1;
		}
	}
}

static void
sisfb_set_pitch(struct sis_video_info *ivideo)
{
	bool isslavemode = false;
	unsigned short HDisplay1 = ivideo->scrnpitchCRT1 >> 3;
	unsigned short HDisplay2 = ivideo->video_linelength >> 3;

	if(sisfb_bridgeisslave(ivideo)) isslavemode = true;

	/* We need to set pitch for CRT1 if bridge is in slave mode, too */
	if((ivideo->currentvbflags & VB_DISPTYPE_DISP1) || (isslavemode)) {
		SiS_SetReg(SISCR, 0x13, (HDisplay1 & 0xFF));
		SiS_SetRegANDOR(SISSR, 0x0E, 0xF0, (HDisplay1 >> 8));
	}

	/* We must not set the pitch for CRT2 if bridge is in slave mode */
	if((ivideo->currentvbflags & VB_DISPTYPE_DISP2) && (!isslavemode)) {
		SiS_SetRegOR(SISPART1, ivideo->CRT2_write_enable, 0x01);
		SiS_SetReg(SISPART1, 0x07, (HDisplay2 & 0xFF));
		SiS_SetRegANDOR(SISPART1, 0x09, 0xF0, (HDisplay2 >> 8));
	}
}

static void
sisfb_bpp_to_var(struct sis_video_info *ivideo, struct fb_var_screeninfo *var)
{
	ivideo->video_cmap_len = sisfb_get_cmap_len(var);

	switch(var->bits_per_pixel) {
	case 8:
		var->red.offset = var->green.offset = var->blue.offset = 0;
		var->red.length = var->green.length = var->blue.length = 8;
		break;
	case 16:
		var->red.offset = 11;
		var->red.length = 5;
		var->green.offset = 5;
		var->green.length = 6;
		var->blue.offset = 0;
		var->blue.length = 5;
		var->transp.offset = 0;
		var->transp.length = 0;
		break;
	case 32:
		var->red.offset = 16;
		var->red.length = 8;
		var->green.offset = 8;
		var->green.length = 8;
		var->blue.offset = 0;
		var->blue.length = 8;
		var->transp.offset = 24;
		var->transp.length = 8;
		break;
	}
}

static int
sisfb_set_mode(struct sis_video_info *ivideo, int clrscrn)
{
	unsigned short modeno = ivideo->mode_no;

	/* >=2.6.12's fbcon clears the screen anyway */
	modeno |= 0x80;

	SiS_SetReg(SISSR, IND_SIS_PASSWORD, SIS_PASSWORD);

	sisfb_pre_setmode(ivideo);

	if(!SiSSetMode(&ivideo->SiS_Pr, modeno)) {
		printk(KERN_ERR "sisfb: Setting mode[0x%x] failed\n", ivideo->mode_no);
		return -EINVAL;
	}

	SiS_SetReg(SISSR, IND_SIS_PASSWORD, SIS_PASSWORD);

	sisfb_post_setmode(ivideo);

	return 0;
}


static int
sisfb_do_set_var(struct fb_var_screeninfo *var, int isactive, struct fb_info *info)
{
	struct sis_video_info *ivideo = (struct sis_video_info *)info->par;
	unsigned int htotal = 0, vtotal = 0;
	unsigned int drate = 0, hrate = 0;
	int found_mode = 0, ret;
	int old_mode;
	u32 pixclock;

	htotal = var->left_margin + var->xres + var->right_margin + var->hsync_len;

	vtotal = var->upper_margin + var->lower_margin + var->vsync_len;

	pixclock = var->pixclock;

	if((var->vmode & FB_VMODE_MASK) == FB_VMODE_NONINTERLACED) {
		vtotal += var->yres;
		vtotal <<= 1;
	} else if((var->vmode & FB_VMODE_MASK) == FB_VMODE_DOUBLE) {
		vtotal += var->yres;
		vtotal <<= 2;
	} else if((var->vmode & FB_VMODE_MASK) == FB_VMODE_INTERLACED) {
		vtotal += var->yres;
		vtotal <<= 1;
	} else 	vtotal += var->yres;

	if(!(htotal) || !(vtotal)) {
		DPRINTK("sisfb: Invalid 'var' information\n");
		return -EINVAL;
	}

	if(pixclock && htotal && vtotal) {
		drate = 1000000000 / pixclock;
		hrate = (drate * 1000) / htotal;
		ivideo->refresh_rate = (unsigned int) (hrate * 2 / vtotal);
	} else {
		ivideo->refresh_rate = 60;
	}

	old_mode = ivideo->sisfb_mode_idx;
	ivideo->sisfb_mode_idx = 0;

	while( (sisbios_mode[ivideo->sisfb_mode_idx].mode_no[0] != 0) &&
	       (sisbios_mode[ivideo->sisfb_mode_idx].xres <= var->xres) ) {
		if( (sisbios_mode[ivideo->sisfb_mode_idx].xres == var->xres) &&
		    (sisbios_mode[ivideo->sisfb_mode_idx].yres == var->yres) &&
		    (sisbios_mode[ivideo->sisfb_mode_idx].bpp == var->bits_per_pixel)) {
			ivideo->mode_no = sisbios_mode[ivideo->sisfb_mode_idx].mode_no[ivideo->mni];
			found_mode = 1;
			break;
		}
		ivideo->sisfb_mode_idx++;
	}

	if(found_mode) {
		ivideo->sisfb_mode_idx = sisfb_validate_mode(ivideo,
				ivideo->sisfb_mode_idx, ivideo->currentvbflags);
	} else {
		ivideo->sisfb_mode_idx = -1;
	}

       	if(ivideo->sisfb_mode_idx < 0) {
		printk(KERN_ERR "sisfb: Mode %dx%dx%d not supported\n", var->xres,
		       var->yres, var->bits_per_pixel);
		ivideo->sisfb_mode_idx = old_mode;
		return -EINVAL;
	}

	ivideo->mode_no = sisbios_mode[ivideo->sisfb_mode_idx].mode_no[ivideo->mni];

	if(sisfb_search_refresh_rate(ivideo, ivideo->refresh_rate, ivideo->sisfb_mode_idx) == 0) {
		ivideo->rate_idx = sisbios_mode[ivideo->sisfb_mode_idx].rate_idx;
		ivideo->refresh_rate = 60;
	}

	if(isactive) {
		/* If acceleration to be used? Need to know
		 * before pre/post_set_mode()
		 */
		ivideo->accel = 0;
#if defined(FBINFO_HWACCEL_DISABLED) && defined(FBINFO_HWACCEL_XPAN)
#ifdef STUPID_ACCELF_TEXT_SHIT
		if(var->accel_flags & FB_ACCELF_TEXT) {
			info->flags &= ~FBINFO_HWACCEL_DISABLED;
		} else {
			info->flags |= FBINFO_HWACCEL_DISABLED;
		}
#endif
		if(!(info->flags & FBINFO_HWACCEL_DISABLED)) ivideo->accel = -1;
#else
		if(var->accel_flags & FB_ACCELF_TEXT) ivideo->accel = -1;
#endif

		if((ret = sisfb_set_mode(ivideo, 1))) {
			return ret;
		}

		ivideo->video_bpp    = sisbios_mode[ivideo->sisfb_mode_idx].bpp;
		ivideo->video_width  = sisbios_mode[ivideo->sisfb_mode_idx].xres;
		ivideo->video_height = sisbios_mode[ivideo->sisfb_mode_idx].yres;

		sisfb_calc_pitch(ivideo, var);
		sisfb_set_pitch(ivideo);

		sisfb_set_vparms(ivideo);

		ivideo->current_width = ivideo->video_width;
		ivideo->current_height = ivideo->video_height;
		ivideo->current_bpp = ivideo->video_bpp;
		ivideo->current_htotal = htotal;
		ivideo->current_vtotal = vtotal;
		ivideo->current_linelength = ivideo->video_linelength;
		ivideo->current_pixclock = var->pixclock;
		ivideo->current_refresh_rate = ivideo->refresh_rate;
		ivideo->sisfb_lastrates[ivideo->mode_no] = ivideo->refresh_rate;
	}

	return 0;
}

static void
sisfb_set_base_CRT1(struct sis_video_info *ivideo, unsigned int base)
{
	SiS_SetReg(SISSR, IND_SIS_PASSWORD, SIS_PASSWORD);

	SiS_SetReg(SISCR, 0x0D, base & 0xFF);
	SiS_SetReg(SISCR, 0x0C, (base >> 8) & 0xFF);
	SiS_SetReg(SISSR, 0x0D, (base >> 16) & 0xFF);
	if(ivideo->sisvga_engine == SIS_315_VGA) {
		SiS_SetRegANDOR(SISSR, 0x37, 0xFE, (base >> 24) & 0x01);
	}
}

static void
sisfb_set_base_CRT2(struct sis_video_info *ivideo, unsigned int base)
{
	if(ivideo->currentvbflags & VB_DISPTYPE_DISP2) {
		SiS_SetRegOR(SISPART1, ivideo->CRT2_write_enable, 0x01);
		SiS_SetReg(SISPART1, 0x06, (base & 0xFF));
		SiS_SetReg(SISPART1, 0x05, ((base >> 8) & 0xFF));
		SiS_SetReg(SISPART1, 0x04, ((base >> 16) & 0xFF));
		if(ivideo->sisvga_engine == SIS_315_VGA) {
			SiS_SetRegANDOR(SISPART1, 0x02, 0x7F, ((base >> 24) & 0x01) << 7);
		}
	}
}

static int
sisfb_pan_var(struct sis_video_info *ivideo, struct fb_var_screeninfo *var)
{
	if(var->xoffset > (var->xres_virtual - var->xres)) {
		return -EINVAL;
	}
	if(var->yoffset > (var->yres_virtual - var->yres)) {
		return -EINVAL;
	}

	ivideo->current_base = (var->yoffset * var->xres_virtual) + var->xoffset;

	/* calculate base bpp dep. */
	switch(var->bits_per_pixel) {
	case 32:
		break;
	case 16:
		ivideo->current_base >>= 1;
		break;
	case 8:
	default:
		ivideo->current_base >>= 2;
		break;
	}

	ivideo->current_base += (ivideo->video_offset >> 2);

	sisfb_set_base_CRT1(ivideo, ivideo->current_base);
	sisfb_set_base_CRT2(ivideo, ivideo->current_base);

	return 0;
}

static int
sisfb_open(struct fb_info *info, int user)
{
	return 0;
}

static int
sisfb_release(struct fb_info *info, int user)
{
	return 0;
}

static int
sisfb_setcolreg(unsigned regno, unsigned red, unsigned green, unsigned blue,
		unsigned transp, struct fb_info *info)
{
	struct sis_video_info *ivideo = (struct sis_video_info *)info->par;

	if(regno >= sisfb_get_cmap_len(&info->var))
		return 1;

	switch(info->var.bits_per_pixel) {
	case 8:
		SiS_SetRegByte(SISDACA, regno);
		SiS_SetRegByte(SISDACD, (red >> 10));
		SiS_SetRegByte(SISDACD, (green >> 10));
		SiS_SetRegByte(SISDACD, (blue >> 10));
		if(ivideo->currentvbflags & VB_DISPTYPE_DISP2) {
			SiS_SetRegByte(SISDAC2A, regno);
			SiS_SetRegByte(SISDAC2D, (red >> 8));
			SiS_SetRegByte(SISDAC2D, (green >> 8));
			SiS_SetRegByte(SISDAC2D, (blue >> 8));
		}
		break;
	case 16:
		if (regno >= 16)
			break;

		((u32 *)(info->pseudo_palette))[regno] =
				(red & 0xf800)          |
				((green & 0xfc00) >> 5) |
				((blue & 0xf800) >> 11);
		break;
	case 32:
		if (regno >= 16)
			break;

		red >>= 8;
		green >>= 8;
		blue >>= 8;
		((u32 *)(info->pseudo_palette))[regno] =
				(red << 16) | (green << 8) | (blue);
		break;
	}
	return 0;
}

static int
sisfb_set_par(struct fb_info *info)
{
	int err;

	if((err = sisfb_do_set_var(&info->var, 1, info)))
		return err;

	sisfb_get_fix(&info->fix, -1, info);

	return 0;
}

static int
sisfb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
{
	struct sis_video_info *ivideo = (struct sis_video_info *)info->par;
	unsigned int htotal = 0, vtotal = 0, myrateindex = 0;
	unsigned int drate = 0, hrate = 0, maxyres;
	int found_mode = 0;
	int refresh_rate, search_idx, tidx;
	bool recalc_clock = false;
	u32 pixclock;

	htotal = var->left_margin + var->xres + var->right_margin + var->hsync_len;

	vtotal = var->upper_margin + var->lower_margin + var->vsync_len;

	pixclock = var->pixclock;

	if((var->vmode & FB_VMODE_MASK) == FB_VMODE_NONINTERLACED) {
		vtotal += var->yres;
		vtotal <<= 1;
	} else if((var->vmode & FB_VMODE_MASK) == FB_VMODE_DOUBLE) {
		vtotal += var->yres;
		vtotal <<= 2;
	} else if((var->vmode & FB_VMODE_MASK) == FB_VMODE_INTERLACED) {
		vtotal += var->yres;
		vtotal <<= 1;
	} else
		vtotal += var->yres;

	if(!(htotal) || !(vtotal)) {
		SISFAIL("sisfb: no valid timing data");
	}

	search_idx = 0;
	while( (sisbios_mode[search_idx].mode_no[0] != 0) &&
	       (sisbios_mode[search_idx].xres <= var->xres) ) {
		if( (sisbios_mode[search_idx].xres == var->xres) &&
		    (sisbios_mode[search_idx].yres == var->yres) &&
		    (sisbios_mode[search_idx].bpp == var->bits_per_pixel)) {
			if((tidx = sisfb_validate_mode(ivideo, search_idx,
						ivideo->currentvbflags)) > 0) {
				found_mode = 1;
				search_idx = tidx;
				break;
			}
		}
		search_idx++;
	}

	if(!found_mode) {
		search_idx = 0;
		while(sisbios_mode[search_idx].mode_no[0] != 0) {
		   if( (var->xres <= sisbios_mode[search_idx].xres) &&
		       (var->yres <= sisbios_mode[search_idx].yres) &&
		       (var->bits_per_pixel == sisbios_mode[search_idx].bpp) ) {
			if((tidx = sisfb_validate_mode(ivideo,search_idx,
						ivideo->currentvbflags)) > 0) {
				found_mode = 1;
				search_idx = tidx;
				break;
			}
		   }
		   search_idx++;
		}
		if(found_mode) {
			printk(KERN_DEBUG
				"sisfb: Adapted from %dx%dx%d to %dx%dx%d\n",
				var->xres, var->yres, var->bits_per_pixel,
				sisbios_mode[search_idx].xres,
				sisbios_mode[search_idx].yres,
				var->bits_per_pixel);
			var->xres = sisbios_mode[search_idx].xres;
			var->yres = sisbios_mode[search_idx].yres;
		} else {
			printk(KERN_ERR
				"sisfb: Failed to find supported mode near %dx%dx%d\n",
				var->xres, var->yres, var->bits_per_pixel);
			return -EINVAL;
		}
	}

	if( ((ivideo->vbflags2 & VB2_LVDS) ||
	     ((ivideo->vbflags2 & VB2_30xBDH) && (ivideo->currentvbflags & CRT2_LCD))) &&
	    (var->bits_per_pixel == 8) ) {
		/* Slave modes on LVDS and 301B-DH */
		refresh_rate = 60;
		recalc_clock = true;
	} else if( (ivideo->current_htotal == htotal) &&
		   (ivideo->current_vtotal == vtotal) &&
		   (ivideo->current_pixclock == pixclock) ) {
		/* x=x & y=y & c=c -> assume depth change */
		drate = 1000000000 / pixclock;
		hrate = (drate * 1000) / htotal;
		refresh_rate = (unsigned int) (hrate * 2 / vtotal);
	} else if( ( (ivideo->current_htotal != htotal) ||
		     (ivideo->current_vtotal != vtotal) ) &&
		   (ivideo->current_pixclock == var->pixclock) ) {
		/* x!=x | y!=y & c=c -> invalid pixclock */
		if(ivideo->sisfb_lastrates[sisbios_mode[search_idx].mode_no[ivideo->mni]]) {
			refresh_rate =
				ivideo->sisfb_lastrates[sisbios_mode[search_idx].mode_no[ivideo->mni]];
		} else if(ivideo->sisfb_parm_rate != -1) {
			/* Sic, sisfb_parm_rate - want to know originally desired rate here */
			refresh_rate = ivideo->sisfb_parm_rate;
		} else {
			refresh_rate = 60;
		}
		recalc_clock = true;
	} else if((pixclock) && (htotal) && (vtotal)) {
		drate = 1000000000 / pixclock;
		hrate = (drate * 1000) / htotal;
		refresh_rate = (unsigned int) (hrate * 2 / vtotal);
	} else if(ivideo->current_refresh_rate) {
		refresh_rate = ivideo->current_refresh_rate;
		recalc_clock = true;
	} else {
		refresh_rate = 60;
		recalc_clock = true;
	}

	myrateindex = sisfb_search_refresh_rate(ivideo, refresh_rate, search_idx);

	/* Eventually recalculate timing and clock */
	if(recalc_clock) {
		if(!myrateindex) myrateindex = sisbios_mode[search_idx].rate_idx;
		var->pixclock = (u32) (1000000000 / sisfb_mode_rate_to_dclock(&ivideo->SiS_Pr,
						sisbios_mode[search_idx].mode_no[ivideo->mni],
						myrateindex));
		sisfb_mode_rate_to_ddata(&ivideo->SiS_Pr,
					sisbios_mode[search_idx].mode_no[ivideo->mni],
					myrateindex, var);
		if((var->vmode & FB_VMODE_MASK) == FB_VMODE_DOUBLE) {
			var->pixclock <<= 1;
		}
	}

	if(ivideo->sisfb_thismonitor.datavalid) {
		if(!sisfb_verify_rate(ivideo, &ivideo->sisfb_thismonitor, search_idx,
				myrateindex, refresh_rate)) {
			printk(KERN_INFO
				"sisfb: WARNING: Refresh rate exceeds monitor specs!\n");
		}
	}

	/* Adapt RGB settings */
	sisfb_bpp_to_var(ivideo, var);

	/* Sanity check for offsets */
	if(var->xoffset < 0) var->xoffset = 0;
	if(var->yoffset < 0) var->yoffset = 0;

	if(var->xres > var->xres_virtual)
		var->xres_virtual = var->xres;

	if(ivideo->sisfb_ypan) {
		maxyres = sisfb_calc_maxyres(ivideo, var);
		if(ivideo->sisfb_max) {
			var->yres_virtual = maxyres;
		} else {
			if(var->yres_virtual > maxyres) {
				var->yres_virtual = maxyres;
			}
		}
		if(var->yres_virtual <= var->yres) {
			var->yres_virtual = var->yres;
		}
	} else {
		if(var->yres != var->yres_virtual) {
			var->yres_virtual = var->yres;
		}
		var->xoffset = 0;
		var->yoffset = 0;
	}

	/* Truncate offsets to maximum if too high */
	if(var->xoffset > var->xres_virtual - var->xres) {
		var->xoffset = var->xres_virtual - var->xres - 1;
	}

	if(var->yoffset > var->yres_virtual - var->yres) {
		var->yoffset = var->yres_virtual - var->yres - 1;
	}

	/* Set everything else to 0 */
	var->red.msb_right =
		var->green.msb_right =
		var->blue.msb_right =
		var->transp.offset =
		var->transp.length =
		var->transp.msb_right = 0;

	return 0;
}

static int
sisfb_pan_display(struct fb_var_screeninfo *var, struct fb_info* info)
{
	struct sis_video_info *ivideo = (struct sis_video_info *)info->par;
	int err;

	if(var->xoffset > (var->xres_virtual - var->xres))
		return -EINVAL;

	if(var->yoffset > (var->yres_virtual - var->yres))
		return -EINVAL;

	if(var->vmode & FB_VMODE_YWRAP)
		return -EINVAL;

	if(var->xoffset + info->var.xres > info->var.xres_virtual ||
	   var->yoffset + info->var.yres > info->var.yres_virtual)
		return -EINVAL;

	if((err = sisfb_pan_var(ivideo, var)) < 0)
		return err;

	info->var.xoffset = var->xoffset;
	info->var.yoffset = var->yoffset;

	return 0;
}

static int
sisfb_blank(int blank, struct fb_info *info)
{
	struct sis_video_info *ivideo = (struct sis_video_info *)info->par;

	return sisfb_myblank(ivideo, blank);
}

/* ----------- FBDev related routines for all series ---------- */

static int	sisfb_ioctl(struct fb_info *info, unsigned int cmd,
			    unsigned long arg)
{
	struct sis_video_info	*ivideo = (struct sis_video_info *)info->par;
	struct sis_memreq	sismemreq;
	struct fb_vblank	sisvbblank;
	u32			gpu32 = 0;
#ifndef __user
#define __user
#endif
	u32 __user 		*argp = (u32 __user *)arg;

	switch(cmd) {
	   case FBIO_ALLOC:
		if(!capable(CAP_SYS_RAWIO))
			return -EPERM;

		if(copy_from_user(&sismemreq, (void __user *)arg, sizeof(sismemreq)))
			return -EFAULT;

		sis_malloc(&sismemreq);

		if(copy_to_user((void __user *)arg, &sismemreq, sizeof(sismemreq))) {
			sis_free((u32)sismemreq.offset);
			return -EFAULT;
		}
		break;

	   case FBIO_FREE:
		if(!capable(CAP_SYS_RAWIO))
			return -EPERM;

		if(get_user(gpu32, argp))
			return -EFAULT;

		sis_free(gpu32);
		break;

	   case FBIOGET_VBLANK:

		memset(&sisvbblank, 0, sizeof(struct fb_vblank));

		sisvbblank.count = 0;
		sisvbblank.flags = sisfb_setupvbblankflags(ivideo, &sisvbblank.vcount, &sisvbblank.hcount);

		if(copy_to_user((void __user *)arg, &sisvbblank, sizeof(sisvbblank)))
			return -EFAULT;

		break;

	   case SISFB_GET_INFO_SIZE:
		return put_user(sizeof(struct sisfb_info), argp);

	   case SISFB_GET_INFO_OLD:
		if(ivideo->warncount++ < 10)
			printk(KERN_INFO
				"sisfb: Deprecated ioctl call received - update your application!\n");
	   case SISFB_GET_INFO:  /* For communication with X driver */
		ivideo->sisfb_infoblock.sisfb_id         = SISFB_ID;
		ivideo->sisfb_infoblock.sisfb_version    = VER_MAJOR;
		ivideo->sisfb_infoblock.sisfb_revision   = VER_MINOR;
		ivideo->sisfb_infoblock.sisfb_patchlevel = VER_LEVEL;
		ivideo->sisfb_infoblock.chip_id = ivideo->chip_id;
		ivideo->sisfb_infoblock.sisfb_pci_vendor = ivideo->chip_vendor;
		ivideo->sisfb_infoblock.memory = ivideo->video_size / 1024;
		ivideo->sisfb_infoblock.heapstart = ivideo->heapstart / 1024;
		if(ivideo->modechanged) {
			ivideo->sisfb_infoblock.fbvidmode = ivideo->mode_no;
		} else {
			ivideo->sisfb_infoblock.fbvidmode = ivideo->modeprechange;
		}
		ivideo->sisfb_infoblock.sisfb_caps = ivideo->caps;
		ivideo->sisfb_infoblock.sisfb_tqlen = ivideo->cmdQueueSize / 1024;
		ivideo->sisfb_infoblock.sisfb_pcibus = ivideo->pcibus;
		ivideo->sisfb_infoblock.sisfb_pcislot = ivideo->pcislot;
		ivideo->sisfb_infoblock.sisfb_pcifunc = ivideo->pcifunc;
		ivideo->sisfb_infoblock.sisfb_lcdpdc = ivideo->detectedpdc;
		ivideo->sisfb_infoblock.sisfb_lcdpdca = ivideo->detectedpdca;
		ivideo->sisfb_infoblock.sisfb_lcda = ivideo->detectedlcda;
		ivideo->sisfb_infoblock.sisfb_vbflags = ivideo->vbflags;
		ivideo->sisfb_infoblock.sisfb_currentvbflags = ivideo->currentvbflags;
		ivideo->sisfb_infoblock.sisfb_scalelcd = ivideo->SiS_Pr.UsePanelScaler;
		ivideo->sisfb_infoblock.sisfb_specialtiming = ivideo->SiS_Pr.SiS_CustomT;
		ivideo->sisfb_infoblock.sisfb_haveemi = ivideo->SiS_Pr.HaveEMI ? 1 : 0;
		ivideo->sisfb_infoblock.sisfb_haveemilcd = ivideo->SiS_Pr.HaveEMILCD ? 1 : 0;
		ivideo->sisfb_infoblock.sisfb_emi30 = ivideo->SiS_Pr.EMI_30;
		ivideo->sisfb_infoblock.sisfb_emi31 = ivideo->SiS_Pr.EMI_31;
		ivideo->sisfb_infoblock.sisfb_emi32 = ivideo->SiS_Pr.EMI_32;
		ivideo->sisfb_infoblock.sisfb_emi33 = ivideo->SiS_Pr.EMI_33;
		ivideo->sisfb_infoblock.sisfb_tvxpos = (u16)(ivideo->tvxpos + 32);
		ivideo->sisfb_infoblock.sisfb_tvypos = (u16)(ivideo->tvypos + 32);
		ivideo->sisfb_infoblock.sisfb_heapsize = ivideo->sisfb_heap_size / 1024;
		ivideo->sisfb_infoblock.sisfb_videooffset = ivideo->video_offset;
		ivideo->sisfb_infoblock.sisfb_curfstn = ivideo->curFSTN;
		ivideo->sisfb_infoblock.sisfb_curdstn = ivideo->curDSTN;
		ivideo->sisfb_infoblock.sisfb_vbflags2 = ivideo->vbflags2;
		ivideo->sisfb_infoblock.sisfb_can_post = ivideo->sisfb_can_post ? 1 : 0;
		ivideo->sisfb_infoblock.sisfb_card_posted = ivideo->sisfb_card_posted ? 1 : 0;
		ivideo->sisfb_infoblock.sisfb_was_boot_device = ivideo->sisfb_was_boot_device ? 1 : 0;

		if(copy_to_user((void __user *)arg, &ivideo->sisfb_infoblock,
						sizeof(ivideo->sisfb_infoblock)))
			return -EFAULT;

	        break;

	   case SISFB_GET_VBRSTATUS_OLD:
		if(ivideo->warncount++ < 10)
			printk(KERN_INFO
				"sisfb: Deprecated ioctl call received - update your application!\n");
	   case SISFB_GET_VBRSTATUS:
		if(sisfb_CheckVBRetrace(ivideo))
			return put_user((u32)1, argp);
		else
			return put_user((u32)0, argp);

	   case SISFB_GET_AUTOMAXIMIZE_OLD:
		if(ivideo->warncount++ < 10)
			printk(KERN_INFO
				"sisfb: Deprecated ioctl call received - update your application!\n");
	   case SISFB_GET_AUTOMAXIMIZE:
		if(ivideo->sisfb_max)
			return put_user((u32)1, argp);
		else
			return put_user((u32)0, argp);

	   case SISFB_SET_AUTOMAXIMIZE_OLD:
		if(ivideo->warncount++ < 10)
			printk(KERN_INFO
				"sisfb: Deprecated ioctl call received - update your application!\n");
	   case SISFB_SET_AUTOMAXIMIZE:
		if(get_user(gpu32, argp))
			return -EFAULT;

		ivideo->sisfb_max = (gpu32) ? 1 : 0;
		break;

	   case SISFB_SET_TVPOSOFFSET:
		if(get_user(gpu32, argp))
			return -EFAULT;

		sisfb_set_TVxposoffset(ivideo, ((int)(gpu32 >> 16)) - 32);
		sisfb_set_TVyposoffset(ivideo, ((int)(gpu32 & 0xffff)) - 32);
		break;

	   case SISFB_GET_TVPOSOFFSET:
		return put_user((u32)(((ivideo->tvxpos+32)<<16)|((ivideo->tvypos+32)&0xffff)),
							argp);

	   case SISFB_COMMAND:
		if(copy_from_user(&ivideo->sisfb_command, (void __user *)arg,
							sizeof(struct sisfb_cmd)))
			return -EFAULT;

		sisfb_handle_command(ivideo, &ivideo->sisfb_command);

		if(copy_to_user((void __user *)arg, &ivideo->sisfb_command,
							sizeof(struct sisfb_cmd)))
			return -EFAULT;

		break;

	   case SISFB_SET_LOCK:
		if(get_user(gp…