1 // SPDX-License-Identifier: GPL-2.0-or-later
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]
6 * frame buffer driver for Linux kernels >= 2.4.14 and >=2.6.3
8 * Linux kernel specific extensions to init.c/init301.c
10 * Copyright (C) 2001-2005 Thomas Winischhofer, Vienna, Austria.
12 * Author: Thomas Winischhofer <thomas@winischhofer.net>
19 #include <linux/types.h>
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);
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);
36 sisfb_mode_rate_to_dclock(struct SiS_Private *SiS_Pr, unsigned char modeno,
37 unsigned char rateindex)
39 unsigned short ModeNo = modeno;
40 unsigned short ModeIdIndex = 0, ClockIndex = 0;
41 unsigned short RRTI = 0;
44 if(!SiSInitPtr(SiS_Pr)) return 65000;
46 if(rateindex > 0) rateindex--;
48 #ifdef CONFIG_FB_SIS_315
50 case 0x5a: ModeNo = 0x50; break;
51 case 0x5b: ModeNo = 0x56;
55 if(!(SiS_SearchModeID(SiS_Pr, &ModeNo, &ModeIdIndex))) {
56 printk(KERN_ERR "Could not find mode %x\n", ModeNo);
60 RRTI = SiS_Pr->SiS_EModeIDTable[ModeIdIndex].REFindex;
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;
68 ClockIndex = SiS_Pr->SiS_RefIndex[RRTI].Ext_CRTVCLK_NORM;
72 ClockIndex = SiS_Pr->SiS_RefIndex[RRTI].Ext_CRTVCLK;
75 Clock = SiS_Pr->SiS_VCLKData[ClockIndex].CLOCK * 1000;
81 sisfb_mode_rate_to_ddata(struct SiS_Private *SiS_Pr, unsigned char modeno,
82 unsigned char rateindex, struct fb_var_screeninfo *var)
84 unsigned short ModeNo = modeno;
85 unsigned short ModeIdIndex = 0, index = 0, RRTI = 0;
88 if(!SiSInitPtr(SiS_Pr)) return 0;
90 if(rateindex > 0) rateindex--;
92 #ifdef CONFIG_FB_SIS_315
94 case 0x5a: ModeNo = 0x50; break;
95 case 0x5b: ModeNo = 0x56;
99 if(!(SiS_SearchModeID(SiS_Pr, &ModeNo, &ModeIdIndex))) return 0;
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;
108 index = SiS_Pr->SiS_RefIndex[RRTI].Ext_CRT1CRTC_NORM;
112 index = SiS_Pr->SiS_RefIndex[RRTI].Ext_CRT1CRTC;
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,
121 if(SiS_Pr->SiS_RefIndex[RRTI].Ext_InfoFlag & 0x8000)
122 var->sync &= ~FB_SYNC_VERT_HIGH_ACT;
124 var->sync |= FB_SYNC_VERT_HIGH_ACT;
126 if(SiS_Pr->SiS_RefIndex[RRTI].Ext_InfoFlag & 0x4000)
127 var->sync &= ~FB_SYNC_HOR_HIGH_ACT;
129 var->sync |= FB_SYNC_HOR_HIGH_ACT;
131 var->vmode = FB_VMODE_NONINTERLACED;
132 if(SiS_Pr->SiS_RefIndex[RRTI].Ext_InfoFlag & 0x0080)
133 var->vmode = FB_VMODE_INTERLACED;
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;
148 if((var->vmode & FB_VMODE_MASK) == FB_VMODE_INTERLACED) {
150 var->upper_margin <<= 1;
151 var->lower_margin <<= 1;
152 var->vsync_len <<= 1;
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;
164 sisfb_gettotalfrommode(struct SiS_Private *SiS_Pr, unsigned char modeno, int *htotal,
165 int *vtotal, unsigned char rateindex)
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;
172 if(!SiSInitPtr(SiS_Pr)) return false;
174 if(rateindex > 0) rateindex--;
176 #ifdef CONFIG_FB_SIS_315
178 case 0x5a: ModeNo = 0x50; break;
179 case 0x5b: ModeNo = 0x56;
183 if(!(SiS_SearchModeID(SiS_Pr, &ModeNo, &ModeIdIndex))) return false;
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;
192 CRT1Index = SiS_Pr->SiS_RefIndex[RRTI].Ext_CRT1CRTC_NORM;
196 CRT1Index = SiS_Pr->SiS_RefIndex[RRTI].Ext_CRT1CRTC;
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;
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;
211 if(SiS_Pr->SiS_RefIndex[RRTI].Ext_InfoFlag & InterlaceMode)