/drivers/video/sis/initextlfb.c

  1/*
  2 * SiS 300/540/630[S]/730[S]
  3 * SiS 315[E|PRO]/550/[M]65x/[M]66x[F|M|G]X/[M]74x[GX]/330/[M]76x[GX]
  4 * XGI V3XT/V5/V8, Z7
  5 * frame buffer driver for Linux kernels >= 2.4.14 and >=2.6.3
  6 *
  7 * Linux kernel specific extensions to init.c/init301.c
  8 *
  9 * Copyright (C) 2001-2005 Thomas Winischhofer, Vienna, Austria.
 10 *
 11 * This program is free software; you can redistribute it and/or modify
 12 * it under the terms of the GNU General Public License as published by
 13 * the Free Software Foundation; either version 2 of the named License,
 14 * or any later version.
 15 *
 16 * This program is distributed in the hope that it will be useful,
 17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 19 * GNU General Public License for more details.
 20 *
 21 * You should have received a copy of the GNU General Public License
 22 * along with this program; if not, write to the Free Software
 23 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA
 24 *
 25 * Author:	Thomas Winischhofer <thomas@winischhofer.net>
 26 */
 27
 28#include "initdef.h"
 29#include "vgatypes.h"
 30#include "vstruct.h"
 31
 32#include <linux/types.h>
 33#include <linux/fb.h>
 34
 35int		sisfb_mode_rate_to_dclock(struct SiS_Private *SiS_Pr,
 36			unsigned char modeno, unsigned char rateindex);
 37int		sisfb_mode_rate_to_ddata(struct SiS_Private *SiS_Pr, unsigned char modeno,
 38			unsigned char rateindex, struct fb_var_screeninfo *var);
 39bool		sisfb_gettotalfrommode(struct SiS_Private *SiS_Pr, unsigned char modeno,
 40			int *htotal, int *vtotal, unsigned char rateindex);
 41
 42extern bool	SiSInitPtr(struct SiS_Private *SiS_Pr);
 43extern bool	SiS_SearchModeID(struct SiS_Private *SiS_Pr, unsigned short *ModeNo,
 44			unsigned short *ModeIdIndex);
 45extern void	SiS_Generic_ConvertCRData(struct SiS_Private *SiS_Pr, unsigned char *crdata,
 46			int xres, int yres, struct fb_var_screeninfo *var, bool writeres);
 47
 48int
 49sisfb_mode_rate_to_dclock(struct SiS_Private *SiS_Pr, unsigned char modeno,
 50			unsigned char rateindex)
 51{
 52    unsigned short ModeNo = modeno;
 53    unsigned short ModeIdIndex = 0, ClockIndex = 0;
 54    unsigned short RRTI = 0;
 55    int Clock;
 56
 57    if(!SiSInitPtr(SiS_Pr)) return 65000;
 58
 59    if(rateindex > 0) rateindex--;
 60
 61#ifdef CONFIG_FB_SIS_315
 62    switch(ModeNo) {
 63    case 0x5a: ModeNo = 0x50; break;
 64    case 0x5b: ModeNo = 0x56;
 65    }
 66#endif
 67
 68    if(!(SiS_SearchModeID(SiS_Pr, &ModeNo, &ModeIdIndex))) {;
 69       printk(KERN_ERR "Could not find mode %x\n", ModeNo);
 70       return 65000;
 71    }
 72
 73    RRTI = SiS_Pr->SiS_EModeIDTable[ModeIdIndex].REFindex;
 74
 75    if(SiS_Pr->SiS_RefIndex[RRTI].Ext_InfoFlag & HaveWideTiming) {
 76       if(SiS_Pr->SiS_UseWide == 1) {
 77	  /* Wide screen: Ignore rateindex */
 78	  ClockIndex = SiS_Pr->SiS_RefIndex[RRTI].Ext_CRTVCLK_WIDE;
 79       } else {
 80	  RRTI += rateindex;
 81	  ClockIndex = SiS_Pr->SiS_RefIndex[RRTI].Ext_CRTVCLK_NORM;
 82       }
 83    } else {
 84       RRTI += rateindex;
 85       ClockIndex = SiS_Pr->SiS_RefIndex[RRTI].Ext_CRTVCLK;
 86    }
 87
 88    Clock = SiS_Pr->SiS_VCLKData[ClockIndex].CLOCK * 1000;
 89
 90    return Clock;
 91}
 92
 93int
 94sisfb_mode_rate_to_ddata(struct SiS_Private *SiS_Pr, unsigned char modeno,
 95			unsigned char rateindex, struct fb_var_screeninfo *var)
 96{
 97    unsigned short ModeNo = modeno;
 98    unsigned short ModeIdIndex = 0, index = 0, RRTI = 0;
 99    int            j;
100
101    if(!SiSInitPtr(SiS_Pr)) return 0;
102
103    if(rateindex > 0) rateindex--;
104
105#ifdef CONFIG_FB_SIS_315
106    switch(ModeNo) {
107       case 0x5a: ModeNo = 0x50; break;
108       case 0x5b: ModeNo = 0x56;
109    }
110#endif
111
112    if(!(SiS_SearchModeID(SiS_Pr, &ModeNo, &ModeIdIndex))) return 0;
113
114    RRTI = SiS_Pr->SiS_EModeIDTable[ModeIdIndex].REFindex;
115    if(SiS_Pr->SiS_RefIndex[RRTI].Ext_InfoFlag & HaveWideTiming) {
116       if(SiS_Pr->SiS_UseWide == 1) {
117	  /* Wide screen: Ignore rateindex */
118	  index = SiS_Pr->SiS_RefIndex[RRTI].Ext_CRT1CRTC_WIDE;
119       } else {
120	  RRTI += rateindex;
121	  index = SiS_Pr->SiS_RefIndex[RRTI].Ext_CRT1CRTC_NORM;
122       }
123    } else {
124       RRTI += rateindex;
125       index = SiS_Pr->SiS_RefIndex[RRTI].Ext_CRT1CRTC;
126    }
127
128    SiS_Generic_ConvertCRData(SiS_Pr,
129			(unsigned char *)&SiS_Pr->SiS_CRT1Table[index].CR[0],
130			SiS_Pr->SiS_RefIndex[RRTI].XRes,
131			SiS_Pr->SiS_RefIndex[RRTI].YRes,
132			var, false);
133
134    if(SiS_Pr->SiS_RefIndex[RRTI].Ext_InfoFlag & 0x8000)
135       var->sync &= ~FB_SYNC_VERT_HIGH_ACT;
136    else
137       var->sync |= FB_SYNC_VERT_HIGH_ACT;
138
139    if(SiS_Pr->SiS_RefIndex[RRTI].Ext_InfoFlag & 0x4000)
140       var->sync &= ~FB_SYNC_HOR_HIGH_ACT;
141    else
142       var->sync |= FB_SYNC_HOR_HIGH_ACT;
143
144    var->vmode = FB_VMODE_NONINTERLACED;
145    if(SiS_Pr->SiS_RefIndex[RRTI].Ext_InfoFlag & 0x0080)
146       var->vmode = FB_VMODE_INTERLACED;
147    else {
148       j = 0;
149       while(SiS_Pr->SiS_EModeIDTable[j].Ext_ModeID != 0xff) {
150	  if(SiS_Pr->SiS_EModeIDTable[j].Ext_ModeID ==
151	                  SiS_Pr->SiS_RefIndex[RRTI].ModeID) {
152	      if(SiS_Pr->SiS_EModeIDTable[j].Ext_ModeFlag & DoubleScanMode) {
153	      	  var->vmode = FB_VMODE_DOUBLE;
154	      }
155	      break;
156	  }
157	  j++;
158       }
159    }
160
161    if((var->vmode & FB_VMODE_MASK) == FB_VMODE_INTERLACED) {
162#if 0  /* Do this? */
163       var->upper_margin <<= 1;
164       var->lower_margin <<= 1;
165       var->vsync_len <<= 1;
166#endif
167    } else if((var->vmode & FB_VMODE_MASK) == FB_VMODE_DOUBLE) {
168       var->upper_margin >>= 1;
169       var->lower_margin >>= 1;
170       var->vsync_len >>= 1;
171    }
172
173    return 1;
174}
175
176bool
177sisfb_gettotalfrommode(struct SiS_Private *SiS_Pr, unsigned char modeno, int *htotal,
178			int *vtotal, unsigned char rateindex)
179{
180    unsigned short ModeNo = modeno;
181    unsigned short ModeIdIndex = 0, CRT1Index = 0;
182    unsigned short RRTI = 0;
183    unsigned char  sr_data, cr_data, cr_data2;
184
185    if(!SiSInitPtr(SiS_Pr)) return false;
186
187    if(rateindex > 0) rateindex--;
188
189#ifdef CONFIG_FB_SIS_315
190    switch(ModeNo) {
191       case 0x5a: ModeNo = 0x50; break;
192       case 0x5b: ModeNo = 0x56;
193    }
194#endif
195
196    if(!(SiS_SearchModeID(SiS_Pr, &ModeNo, &ModeIdIndex))) return false;
197
198    RRTI = SiS_Pr->SiS_EModeIDTable[ModeIdIndex].REFindex;
199    if(SiS_Pr->SiS_RefIndex[RRTI].Ext_InfoFlag & HaveWideTiming) {
200       if(SiS_Pr->SiS_UseWide == 1) {
201	  /* Wide screen: Ignore rateindex */
202	  CRT1Index = SiS_Pr->SiS_RefIndex[RRTI].Ext_CRT1CRTC_WIDE;
203       } else {
204	  RRTI += rateindex;
205	  CRT1Index = SiS_Pr->SiS_RefIndex[RRTI].Ext_CRT1CRTC_NORM;
206       }
207    } else {
208       RRTI += rateindex;
209       CRT1Index = SiS_Pr->SiS_RefIndex[RRTI].Ext_CRT1CRTC;
210    }
211
212    sr_data = SiS_Pr->SiS_CRT1Table[CRT1Index].CR[14];
213    cr_data = SiS_Pr->SiS_CRT1Table[CRT1Index].CR[0];
214    *htotal = (((cr_data & 0xff) | ((unsigned short) (sr_data & 0x03) << 8)) + 5) * 8;
215
216    sr_data = SiS_Pr->SiS_CRT1Table[CRT1Index].CR[13];
217    cr_data = SiS_Pr->SiS_CRT1Table[CRT1Index].CR[6];
218    cr_data2 = SiS_Pr->SiS_CRT1Table[CRT1Index].CR[7];
219    *vtotal = ((cr_data & 0xFF) |
220	       ((unsigned short)(cr_data2 & 0x01) <<  8) |
221	       ((unsigned short)(cr_data2 & 0x20) <<  4) |
222	       ((unsigned short)(sr_data  & 0x01) << 10)) + 2;
223
224    if(SiS_Pr->SiS_RefIndex[RRTI].Ext_InfoFlag & InterlaceMode)
225       *vtotal *= 2;
226
227    return true;
228}
229
230
231