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
sisfb_mode_rate_to_dclock(struct SiS_Private * SiS_Pr,unsigned char modeno,unsigned char rateindex)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
sisfb_mode_rate_to_ddata(struct SiS_Private * SiS_Pr,unsigned char modeno,unsigned char rateindex,struct fb_var_screeninfo * var)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
sisfb_gettotalfrommode(struct SiS_Private * SiS_Pr,unsigned char modeno,int * htotal,int * vtotal,unsigned char rateindex)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
219