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
 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
 35int
 36sisfb_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
 80int
 81sisfb_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
163bool
164sisfb_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