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1// SPDX-License-Identifier: GPL-2.0-or-later2/*3 * SiS 300/540/630[S]/730[S]4 * SiS 315[E|PRO]/550/[M]65x/[M]66x[F|M|G]X/[M]74x[GX]/330/[M]76x[GX]5 * XGI V3XT/V5/V8, Z76 * frame buffer driver for Linux kernels >= 2.4.14 and >=2.6.37 *8 * Linux kernel specific extensions to init.c/init301.c9 *10 * Copyright (C) 2001-2005 Thomas Winischhofer, Vienna, Austria.11 *12 * Author: Thomas Winischhofer <thomas@winischhofer.net>13 */14 15#include "initdef.h"16#include "vgatypes.h"17#include "vstruct.h"18 19#include <linux/types.h>20#include <linux/fb.h>21 22int sisfb_mode_rate_to_dclock(struct SiS_Private *SiS_Pr,23 unsigned char modeno, unsigned char rateindex);24int sisfb_mode_rate_to_ddata(struct SiS_Private *SiS_Pr, unsigned char modeno,25 unsigned char rateindex, struct fb_var_screeninfo *var);26bool sisfb_gettotalfrommode(struct SiS_Private *SiS_Pr, unsigned char modeno,27 int *htotal, int *vtotal, unsigned char rateindex);28 29extern bool SiSInitPtr(struct SiS_Private *SiS_Pr);30extern bool SiS_SearchModeID(struct SiS_Private *SiS_Pr, unsigned short *ModeNo,31 unsigned short *ModeIdIndex);32extern void SiS_Generic_ConvertCRData(struct SiS_Private *SiS_Pr, unsigned char *crdata,33 int xres, int yres, struct fb_var_screeninfo *var, bool writeres);34 35int36sisfb_mode_rate_to_dclock(struct SiS_Private *SiS_Pr, unsigned char modeno,37 unsigned char rateindex)38{39 unsigned short ModeNo = modeno;40 unsigned short ModeIdIndex = 0, ClockIndex = 0;41 unsigned short RRTI = 0;42 int Clock;43 44 if(!SiSInitPtr(SiS_Pr)) return 65000;45 46 if(rateindex > 0) rateindex--;47 48#ifdef CONFIG_FB_SIS_31549 switch(ModeNo) {50 case 0x5a: ModeNo = 0x50; break;51 case 0x5b: ModeNo = 0x56;52 }53#endif54 55 if(!(SiS_SearchModeID(SiS_Pr, &ModeNo, &ModeIdIndex))) {56 printk(KERN_ERR "Could not find mode %x\n", ModeNo);57 return 65000;58 }59 60 RRTI = SiS_Pr->SiS_EModeIDTable[ModeIdIndex].REFindex;61 62 if(SiS_Pr->SiS_RefIndex[RRTI].Ext_InfoFlag & HaveWideTiming) {63 if(SiS_Pr->SiS_UseWide == 1) {64 /* Wide screen: Ignore rateindex */65 ClockIndex = SiS_Pr->SiS_RefIndex[RRTI].Ext_CRTVCLK_WIDE;66 } else {67 RRTI += rateindex;68 ClockIndex = SiS_Pr->SiS_RefIndex[RRTI].Ext_CRTVCLK_NORM;69 }70 } else {71 RRTI += rateindex;72 ClockIndex = SiS_Pr->SiS_RefIndex[RRTI].Ext_CRTVCLK;73 }74 75 Clock = SiS_Pr->SiS_VCLKData[ClockIndex].CLOCK * 1000;76 77 return Clock;78}79 80int81sisfb_mode_rate_to_ddata(struct SiS_Private *SiS_Pr, unsigned char modeno,82 unsigned char rateindex, struct fb_var_screeninfo *var)83{84 unsigned short ModeNo = modeno;85 unsigned short ModeIdIndex = 0, index = 0, RRTI = 0;86 int j;87 88 if(!SiSInitPtr(SiS_Pr)) return 0;89 90 if(rateindex > 0) rateindex--;91 92#ifdef CONFIG_FB_SIS_31593 switch(ModeNo) {94 case 0x5a: ModeNo = 0x50; break;95 case 0x5b: ModeNo = 0x56;96 }97#endif98 99 if(!(SiS_SearchModeID(SiS_Pr, &ModeNo, &ModeIdIndex))) return 0;100 101 RRTI = SiS_Pr->SiS_EModeIDTable[ModeIdIndex].REFindex;102 if(SiS_Pr->SiS_RefIndex[RRTI].Ext_InfoFlag & HaveWideTiming) {103 if(SiS_Pr->SiS_UseWide == 1) {104 /* Wide screen: Ignore rateindex */105 index = SiS_Pr->SiS_RefIndex[RRTI].Ext_CRT1CRTC_WIDE;106 } else {107 RRTI += rateindex;108 index = SiS_Pr->SiS_RefIndex[RRTI].Ext_CRT1CRTC_NORM;109 }110 } else {111 RRTI += rateindex;112 index = SiS_Pr->SiS_RefIndex[RRTI].Ext_CRT1CRTC;113 }114 115 SiS_Generic_ConvertCRData(SiS_Pr,116 (unsigned char *)&SiS_Pr->SiS_CRT1Table[index].CR[0],117 SiS_Pr->SiS_RefIndex[RRTI].XRes,118 SiS_Pr->SiS_RefIndex[RRTI].YRes,119 var, false);120 121 if(SiS_Pr->SiS_RefIndex[RRTI].Ext_InfoFlag & 0x8000)122 var->sync &= ~FB_SYNC_VERT_HIGH_ACT;123 else124 var->sync |= FB_SYNC_VERT_HIGH_ACT;125 126 if(SiS_Pr->SiS_RefIndex[RRTI].Ext_InfoFlag & 0x4000)127 var->sync &= ~FB_SYNC_HOR_HIGH_ACT;128 else129 var->sync |= FB_SYNC_HOR_HIGH_ACT;130 131 var->vmode = FB_VMODE_NONINTERLACED;132 if(SiS_Pr->SiS_RefIndex[RRTI].Ext_InfoFlag & 0x0080)133 var->vmode = FB_VMODE_INTERLACED;134 else {135 j = 0;136 while(SiS_Pr->SiS_EModeIDTable[j].Ext_ModeID != 0xff) {137 if(SiS_Pr->SiS_EModeIDTable[j].Ext_ModeID ==138 SiS_Pr->SiS_RefIndex[RRTI].ModeID) {139 if(SiS_Pr->SiS_EModeIDTable[j].Ext_ModeFlag & DoubleScanMode) {140 var->vmode = FB_VMODE_DOUBLE;141 }142 break;143 }144 j++;145 }146 }147 148 if((var->vmode & FB_VMODE_MASK) == FB_VMODE_INTERLACED) {149#if 0 /* Do this? */150 var->upper_margin <<= 1;151 var->lower_margin <<= 1;152 var->vsync_len <<= 1;153#endif154 } else if((var->vmode & FB_VMODE_MASK) == FB_VMODE_DOUBLE) {155 var->upper_margin >>= 1;156 var->lower_margin >>= 1;157 var->vsync_len >>= 1;158 }159 160 return 1;161}162 163bool164sisfb_gettotalfrommode(struct SiS_Private *SiS_Pr, unsigned char modeno, int *htotal,165 int *vtotal, unsigned char rateindex)166{167 unsigned short ModeNo = modeno;168 unsigned short ModeIdIndex = 0, CRT1Index = 0;169 unsigned short RRTI = 0;170 unsigned char sr_data, cr_data, cr_data2;171 172 if(!SiSInitPtr(SiS_Pr)) return false;173 174 if(rateindex > 0) rateindex--;175 176#ifdef CONFIG_FB_SIS_315177 switch(ModeNo) {178 case 0x5a: ModeNo = 0x50; break;179 case 0x5b: ModeNo = 0x56;180 }181#endif182 183 if(!(SiS_SearchModeID(SiS_Pr, &ModeNo, &ModeIdIndex))) return false;184 185 RRTI = SiS_Pr->SiS_EModeIDTable[ModeIdIndex].REFindex;186 if(SiS_Pr->SiS_RefIndex[RRTI].Ext_InfoFlag & HaveWideTiming) {187 if(SiS_Pr->SiS_UseWide == 1) {188 /* Wide screen: Ignore rateindex */189 CRT1Index = SiS_Pr->SiS_RefIndex[RRTI].Ext_CRT1CRTC_WIDE;190 } else {191 RRTI += rateindex;192 CRT1Index = SiS_Pr->SiS_RefIndex[RRTI].Ext_CRT1CRTC_NORM;193 }194 } else {195 RRTI += rateindex;196 CRT1Index = SiS_Pr->SiS_RefIndex[RRTI].Ext_CRT1CRTC;197 }198 199 sr_data = SiS_Pr->SiS_CRT1Table[CRT1Index].CR[14];200 cr_data = SiS_Pr->SiS_CRT1Table[CRT1Index].CR[0];201 *htotal = (((cr_data & 0xff) | ((unsigned short) (sr_data & 0x03) << 8)) + 5) * 8;202 203 sr_data = SiS_Pr->SiS_CRT1Table[CRT1Index].CR[13];204 cr_data = SiS_Pr->SiS_CRT1Table[CRT1Index].CR[6];205 cr_data2 = SiS_Pr->SiS_CRT1Table[CRT1Index].CR[7];206 *vtotal = ((cr_data & 0xFF) |207 ((unsigned short)(cr_data2 & 0x01) << 8) |208 ((unsigned short)(cr_data2 & 0x20) << 4) |209 ((unsigned short)(sr_data & 0x01) << 10)) + 2;210 211 if(SiS_Pr->SiS_RefIndex[RRTI].Ext_InfoFlag & InterlaceMode)212 *vtotal *= 2;213 214 return true;215}216 217 218 219