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
35 int sisfb_mode_rate_to_dclock(struct SiS_Private *SiS_Pr,
36 unsigned char modeno, unsigned char rateindex);
37 int sisfb_mode_rate_to_ddata(struct SiS_Private *SiS_Pr, unsigned char modeno,
38 unsigned char rateindex, struct fb_var_screeninfo *var);
39 bool sisfb_gettotalfrommode(struct SiS_Private *SiS_Pr, unsigned char modeno,
40 int *htotal, int *vtotal, unsigned char rateindex);
41
42 extern bool SiSInitPtr(struct SiS_Private *SiS_Pr);
43 extern bool SiS_SearchModeID(struct SiS_Private *SiS_Pr, unsigned short *ModeNo,
44 unsigned short *ModeIdIndex);
45 extern 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
48 int
sisfb_mode_rate_to_dclock(struct SiS_Private * SiS_Pr,unsigned char modeno,unsigned char rateindex)49 sisfb_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
93 int
sisfb_mode_rate_to_ddata(struct SiS_Private * SiS_Pr,unsigned char modeno,unsigned char rateindex,struct fb_var_screeninfo * var)94 sisfb_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
176 bool
sisfb_gettotalfrommode(struct SiS_Private * SiS_Pr,unsigned char modeno,int * htotal,int * vtotal,unsigned char rateindex)177 sisfb_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
232