// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* SiS 300/540/630[S]/730[S]
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* SiS 315[E|PRO]/550/[M]65x/[M]66x[F|M|G]X/[M]74x[GX]/330/[M]76x[GX]
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* XGI V3XT/V5/V8, Z7
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* frame buffer driver for Linux kernels >= 2.4.14 and >=2.6.3
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*
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* Linux kernel specific extensions to init.c/init301.c
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*
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* Copyright (C) 2001-2005 Thomas Winischhofer, Vienna, Austria.
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*
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* Author: Thomas Winischhofer <thomas@winischhofer.net>
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*/
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#include "initdef.h"
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#include "vgatypes.h"
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#include "vstruct.h"
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#include <linux/types.h>
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#include <linux/fb.h>
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int sisfb_mode_rate_to_dclock(struct SiS_Private *SiS_Pr,
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unsigned char modeno, unsigned char rateindex);
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int sisfb_mode_rate_to_ddata(struct SiS_Private *SiS_Pr, unsigned char modeno,
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unsigned char rateindex, struct fb_var_screeninfo *var);
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bool sisfb_gettotalfrommode(struct SiS_Private *SiS_Pr, unsigned char modeno,
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int *htotal, int *vtotal, unsigned char rateindex);
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extern bool SiSInitPtr(struct SiS_Private *SiS_Pr);
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extern bool SiS_SearchModeID(struct SiS_Private *SiS_Pr, unsigned short *ModeNo,
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unsigned short *ModeIdIndex);
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extern void SiS_Generic_ConvertCRData(struct SiS_Private *SiS_Pr, unsigned char *crdata,
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int xres, int yres, struct fb_var_screeninfo *var, bool writeres);
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int
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sisfb_mode_rate_to_dclock(struct SiS_Private *SiS_Pr, unsigned char modeno,
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unsigned char rateindex)
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{
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unsigned short ModeNo = modeno;
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unsigned short ModeIdIndex = 0, ClockIndex = 0;
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unsigned short RRTI = 0;
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int Clock;
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if(!SiSInitPtr(SiS_Pr)) return 65000;
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if(rateindex > 0) rateindex--;
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#ifdef CONFIG_FB_SIS_315
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switch(ModeNo) {
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case 0x5a: ModeNo = 0x50; break;
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case 0x5b: ModeNo = 0x56;
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}
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#endif
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if(!(SiS_SearchModeID(SiS_Pr, &ModeNo, &ModeIdIndex))) {
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printk(KERN_ERR "Could not find mode %x\n", ModeNo);
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return 65000;
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}
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RRTI = SiS_Pr->SiS_EModeIDTable[ModeIdIndex].REFindex;
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if(SiS_Pr->SiS_RefIndex[RRTI].Ext_InfoFlag & HaveWideTiming) {
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if(SiS_Pr->SiS_UseWide == 1) {
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/* Wide screen: Ignore rateindex */
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ClockIndex = SiS_Pr->SiS_RefIndex[RRTI].Ext_CRTVCLK_WIDE;
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} else {
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RRTI += rateindex;
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ClockIndex = SiS_Pr->SiS_RefIndex[RRTI].Ext_CRTVCLK_NORM;
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}
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} else {
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RRTI += rateindex;
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ClockIndex = SiS_Pr->SiS_RefIndex[RRTI].Ext_CRTVCLK;
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}
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Clock = SiS_Pr->SiS_VCLKData[ClockIndex].CLOCK * 1000;
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return Clock;
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}
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int
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sisfb_mode_rate_to_ddata(struct SiS_Private *SiS_Pr, unsigned char modeno,
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unsigned char rateindex, struct fb_var_screeninfo *var)
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{
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unsigned short ModeNo = modeno;
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unsigned short ModeIdIndex = 0, index = 0, RRTI = 0;
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int j;
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if(!SiSInitPtr(SiS_Pr)) return 0;
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if(rateindex > 0) rateindex--;
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#ifdef CONFIG_FB_SIS_315
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switch(ModeNo) {
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case 0x5a: ModeNo = 0x50; break;
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case 0x5b: ModeNo = 0x56;
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}
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#endif
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if(!(SiS_SearchModeID(SiS_Pr, &ModeNo, &ModeIdIndex))) return 0;
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RRTI = SiS_Pr->SiS_EModeIDTable[ModeIdIndex].REFindex;
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if(SiS_Pr->SiS_RefIndex[RRTI].Ext_InfoFlag & HaveWideTiming) {
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if(SiS_Pr->SiS_UseWide == 1) {
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/* Wide screen: Ignore rateindex */
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index = SiS_Pr->SiS_RefIndex[RRTI].Ext_CRT1CRTC_WIDE;
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} else {
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RRTI += rateindex;
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index = SiS_Pr->SiS_RefIndex[RRTI].Ext_CRT1CRTC_NORM;
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}
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} else {
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RRTI += rateindex;
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index = SiS_Pr->SiS_RefIndex[RRTI].Ext_CRT1CRTC;
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}
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SiS_Generic_ConvertCRData(SiS_Pr,
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(unsigned char *)&SiS_Pr->SiS_CRT1Table[index].CR[0],
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SiS_Pr->SiS_RefIndex[RRTI].XRes,
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SiS_Pr->SiS_RefIndex[RRTI].YRes,
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var, false);
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if(SiS_Pr->SiS_RefIndex[RRTI].Ext_InfoFlag & 0x8000)
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var->sync &= ~FB_SYNC_VERT_HIGH_ACT;
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else
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var->sync |= FB_SYNC_VERT_HIGH_ACT;
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if(SiS_Pr->SiS_RefIndex[RRTI].Ext_InfoFlag & 0x4000)
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var->sync &= ~FB_SYNC_HOR_HIGH_ACT;
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else
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var->sync |= FB_SYNC_HOR_HIGH_ACT;
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var->vmode = FB_VMODE_NONINTERLACED;
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if(SiS_Pr->SiS_RefIndex[RRTI].Ext_InfoFlag & 0x0080)
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var->vmode = FB_VMODE_INTERLACED;
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else {
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j = 0;
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while(SiS_Pr->SiS_EModeIDTable[j].Ext_ModeID != 0xff) {
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if(SiS_Pr->SiS_EModeIDTable[j].Ext_ModeID ==
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SiS_Pr->SiS_RefIndex[RRTI].ModeID) {
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if(SiS_Pr->SiS_EModeIDTable[j].Ext_ModeFlag & DoubleScanMode) {
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var->vmode = FB_VMODE_DOUBLE;
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}
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break;
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}
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j++;
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}
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}
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if((var->vmode & FB_VMODE_MASK) == FB_VMODE_INTERLACED) {
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#if 0 /* Do this? */
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var->upper_margin <<= 1;
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var->lower_margin <<= 1;
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var->vsync_len <<= 1;
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#endif
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} else if((var->vmode & FB_VMODE_MASK) == FB_VMODE_DOUBLE) {
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var->upper_margin >>= 1;
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var->lower_margin >>= 1;
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var->vsync_len >>= 1;
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}
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return 1;
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}
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bool
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sisfb_gettotalfrommode(struct SiS_Private *SiS_Pr, unsigned char modeno, int *htotal,
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int *vtotal, unsigned char rateindex)
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{
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unsigned short ModeNo = modeno;
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unsigned short ModeIdIndex = 0, CRT1Index = 0;
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unsigned short RRTI = 0;
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unsigned char sr_data, cr_data, cr_data2;
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if(!SiSInitPtr(SiS_Pr)) return false;
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if(rateindex > 0) rateindex--;
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#ifdef CONFIG_FB_SIS_315
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switch(ModeNo) {
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case 0x5a: ModeNo = 0x50; break;
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case 0x5b: ModeNo = 0x56;
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}
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#endif
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if(!(SiS_SearchModeID(SiS_Pr, &ModeNo, &ModeIdIndex))) return false;
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RRTI = SiS_Pr->SiS_EModeIDTable[ModeIdIndex].REFindex;
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if(SiS_Pr->SiS_RefIndex[RRTI].Ext_InfoFlag & HaveWideTiming) {
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if(SiS_Pr->SiS_UseWide == 1) {
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/* Wide screen: Ignore rateindex */
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CRT1Index = SiS_Pr->SiS_RefIndex[RRTI].Ext_CRT1CRTC_WIDE;
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} else {
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RRTI += rateindex;
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CRT1Index = SiS_Pr->SiS_RefIndex[RRTI].Ext_CRT1CRTC_NORM;
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}
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} else {
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RRTI += rateindex;
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CRT1Index = SiS_Pr->SiS_RefIndex[RRTI].Ext_CRT1CRTC;
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}
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sr_data = SiS_Pr->SiS_CRT1Table[CRT1Index].CR[14];
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cr_data = SiS_Pr->SiS_CRT1Table[CRT1Index].CR[0];
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*htotal = (((cr_data & 0xff) | ((unsigned short) (sr_data & 0x03) << 8)) + 5) * 8;
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sr_data = SiS_Pr->SiS_CRT1Table[CRT1Index].CR[13];
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cr_data = SiS_Pr->SiS_CRT1Table[CRT1Index].CR[6];
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cr_data2 = SiS_Pr->SiS_CRT1Table[CRT1Index].CR[7];
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*vtotal = ((cr_data & 0xFF) |
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((unsigned short)(cr_data2 & 0x01) << 8) |
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((unsigned short)(cr_data2 & 0x20) << 4) |
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((unsigned short)(sr_data & 0x01) << 10)) + 2;
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if(SiS_Pr->SiS_RefIndex[RRTI].Ext_InfoFlag & InterlaceMode)
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*vtotal *= 2;
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return true;
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}
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