sys/src/cmd/aux/vga/vision964.c

   1 #include <u.h>
   2 #include <libc.h>
   3 #include <bio.h>
   4
   5 #include "pci.h"
   6 #include "vga.h"
   7
   8 /*
   9  * S3 Vision964 GUI Accelerator.
  10  */
  11 static void
  12 snarf(Vga* vga, Ctlr* ctlr)
  13 {
  14         s3generic.snarf(vga, ctlr);
  15         vga->crt[0x22] = vgaxi(Crtx, 0x22);
  16         vga->crt[0x24] = vgaxi(Crtx, 0x24);
  17         vga->crt[0x26] = vgaxi(Crtx, 0x26);
  18 }
  19
  20 static void
  21 options(Vga*, Ctlr* ctlr)
  22 {
  23         ctlr->flag |= Hlinear|Henhanced|Foptions;
  24 }
  25
  26 static void
  27 init(Vga* vga, Ctlr* ctlr)
  28 {
  29         Mode *mode;
  30         ulong x;
  31         int sid, dbl, bpp, divide;
  32         char *val;
  33
  34         if(vga->mode->z > 8)
  35                 error("depth %d not supported\n", vga->mode->z);
  36
  37         mode = vga->mode;
  38         if(vga->ramdac && (vga->ramdac->flag & Uclk2)){
  39                 resyncinit(vga, ctlr, Uenhanced, 0);
  40                 vga->crt[0x00] = ((mode->ht/2)>>3)-5;
  41                 vga->crt[0x01] = ((mode->x/2)>>3)-1;
  42                 vga->crt[0x02] = ((mode->shb/2)>>3)-1;
  43
  44                 x = (mode->ehb/2)>>3;
  45                 vga->crt[0x03] = 0x80|(x & 0x1F);
  46                 vga->crt[0x04] = (mode->shs/2)>>3;
  47                 vga->crt[0x05] = ((mode->ehs/2)>>3) & 0x1F;
  48                 if(x & 0x20)
  49                         vga->crt[0x05] |= 0x80;
  50                 vga->crt[0x13] = mode->x/8;
  51         }
  52         else if(mode->z == 8)
  53                 resyncinit(vga, ctlr, Uenhanced, 0);
  54         s3generic.init(vga, ctlr);
  55         /*
  56         if((ctlr->flag & Uenhanced) == 0)
  57                 vga->crt[0x33] &= ~0x20;
  58          */
  59         vga->crt[0x3B] = (vga->crt[0]+vga->crt[4]+1)/2;
  60         if(vga->crt[0x3B] & 0x100)
  61                 vga->crt[0x5D] |= 0x40;
  62         vga->crt[0x55] = 0x00;
  63
  64         vga->crt[0x40] &= ~0x10;
  65         vga->crt[0x53] &= ~0x20;
  66         vga->crt[0x58] &= ~0x48;
  67         if(dbattr(vga->attr, "sam512") == 0)
  68                 vga->crt[0x58] |= 0x40;         /* set 256 word SAM, always works */
  69         vga->crt[0x65] = 0x00;
  70         vga->crt[0x66] &= ~0x07;
  71         vga->crt[0x6D] = 0x00;
  72         if(ctlr->flag & Uenhanced){
  73                 if(vga->ramdac && (vga->ramdac->flag & Hsid32))
  74                         sid = 32;
  75                 else
  76                         sid = 64;
  77                 if(vga->ramdac && (vga->ramdac->flag & Uclk2))
  78                         dbl = 2;
  79                 else
  80                         dbl = 1;
  81                 if(mode->z < 4)
  82                         bpp = 4;
  83                 else
  84                         bpp = mode->z;
  85                 divide = sid/(dbl*bpp);
  86                 switch(divide){
  87                 case 2:
  88                         vga->crt[0x66] |= 0x01;
  89                         break;
  90                 case 4:
  91                         vga->crt[0x66] |= 0x02;
  92                         break;
  93                 case 8:
  94                         vga->crt[0x66] |= 0x03;
  95                         break;
  96                 case 16:
  97                         vga->crt[0x66] |= 0x04;
  98                         break;
  99                 case 32:
 100                         vga->crt[0x66] |= 0x05;
 101                         break;
 102                 }
 103
 104                 vga->crt[0x40] |= 0x10;
 105                 vga->crt[0x65] |= 0x02;
 106                 if(vga->ramdac && (vga->ramdac->flag & Hsid32))
 107                         vga->crt[0x66] |= 0x10;
 108
 109                 /*
 110                  * Some heuristics (what part of aux/vga isn't?)
 111                  * to prevent some of the right border appearing
 112                  * on the left edge of the screen.
 113                  */
 114                 if(dbattr(vga->attr, "vclkphs"))
 115                         vga->crt[0x67] |= 0x01;
 116                 if(val = dbattr(vga->attr, "delaybl"))
 117                         vga->crt[0x6D] |= strtoul(val, 0, 0) & 0x07;
 118                 else if(mode->x > 1024)
 119                         vga->crt[0x6D] |= 0x01;
 120                 else
 121                         vga->crt[0x6D] |= 0x03;
 122
 123                 if(val = dbattr(vga->attr, "delaysc"))
 124                         vga->crt[0x6D] |= (strtoul(val, 0, 0) & 0x07)<<4;
 125         }
 126 }
 127
 128 static void
 129 load(Vga* vga, Ctlr* ctlr)
 130 {
 131         ushort advfunc;
 132
 133         s3generic.load(vga, ctlr);
 134         vgaxo(Crtx, 0x65, vga->crt[0x65]);
 135         vgaxo(Crtx, 0x66, vga->crt[0x66]);
 136         vgaxo(Crtx, 0x6D, vga->crt[0x6D]);
 137
 138         advfunc = 0x0000;
 139         if(ctlr->flag & Uenhanced)
 140                 advfunc = 0x0001;
 141         outportw(0x4AE8, advfunc);
 142 }
 143
 144 static void
 145 dump(Vga* vga, Ctlr* ctlr)
 146 {
 147         s3generic.dump(vga, ctlr);
 148         printitem(ctlr->name, "Crt22");
 149         printreg(vga->crt[0x22]);
 150         printitem(ctlr->name, "Crt24");
 151         printreg(vga->crt[0x24]);
 152         printitem(ctlr->name, "Crt26");
 153         printreg(vga->crt[0x26]);
 154 }
 155
 156 Ctlr vision964 = {
 157         "vision964",                    /* name */
 158         snarf,                          /* snarf */
 159         options,                        /* options */
 160         init,                           /* init */
 161         load,                           /* load */
 162         dump,                           /* dump */
 163 };