drivers/video/fbdev/sis/initextlfb.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   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, Z7
   6  * frame buffer driver for Linux kernels >= 2.4.14 and >=2.6.3
   7  *
   8  * Linux kernel specific extensions to init.c/init301.c
   9  *
  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
  22 int             sisfb_mode_rate_to_dclock(struct SiS_Private *SiS_Pr,
  23                         unsigned char modeno, unsigned char rateindex);
  24 int             sisfb_mode_rate_to_ddata(struct SiS_Private *SiS_Pr, unsigned char modeno,
  25                         unsigned char rateindex, struct fb_var_screeninfo *var);
  26 bool            sisfb_gettotalfrommode(struct SiS_Private *SiS_Pr, unsigned char modeno,
  27                         int *htotal, int *vtotal, unsigned char rateindex);
  28
  29 extern bool     SiSInitPtr(struct SiS_Private *SiS_Pr);
  30 extern bool     SiS_SearchModeID(struct SiS_Private *SiS_Pr, unsigned short *ModeNo,
  31                         unsigned short *ModeIdIndex);
  32 extern 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
  35 int
  36 sisfb_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_315
  49     switch(ModeNo) {
  50     case 0x5a: ModeNo = 0x50; break;
  51     case 0x5b: ModeNo = 0x56;
  52     }
  53 #endif
  54
  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
  80 int
  81 sisfb_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_315
  93     switch(ModeNo) {
  94        case 0x5a: ModeNo = 0x50; break;
  95        case 0x5b: ModeNo = 0x56;
  96     }
  97 #endif
  98
  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     else
 124        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     else
 129        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 #endif
 154     } 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
 163 bool
 164 sisfb_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_315
 177     switch(ModeNo) {
 178        case 0x5a: ModeNo = 0x50; break;
 179        case 0x5b: ModeNo = 0x56;
 180     }
 181 #endif
 182
 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