sys/src/9/pc/vgai81x.c

   1 #include "u.h"
   2 #include "../port/lib.h"
   3 #include "mem.h"
   4 #include "dat.h"
   5 #include "fns.h"
   6 #include "io.h"
   7 #include "../port/error.h"
   8
   9 #define Image   IMAGE
  10 #include <draw.h>
  11 #include <memdraw.h>
  12 #include <cursor.h>
  13 #include "screen.h"
  14
  15 typedef struct
  16 {
  17         ushort  ctl;
  18         ushort  pad;
  19         ulong   base;
  20         ulong   pos;
  21 } CursorI81x;
  22
  23 enum {
  24         Fbsize          = 8*MB,
  25
  26         hwCur           = 0x70080,
  27         SRX             = 0x3c4,
  28         DPMSsync        = 0x5002,
  29 };
  30
  31 static void
  32 i81xblank(VGAscr *scr, int blank)
  33 {
  34         char *srx, *srxd, *dpms;
  35         char sr01, mode;
  36
  37         srx = (char *)scr->mmio+SRX;
  38         srxd = srx+1;
  39         dpms = (char *)scr->mmio+DPMSsync;
  40
  41         *srx = 0x01;
  42         sr01 = *srxd & ~0x20;
  43         mode = *dpms & 0xf0;
  44
  45         if(blank) {
  46                 sr01 |= 0x20;
  47                 mode |= 0x0a;
  48         }
  49         *srxd = sr01;
  50         *dpms = mode;
  51 }
  52
  53 static void
  54 i81xenable(VGAscr* scr)
  55 {
  56         Pcidev *p;
  57         int size;
  58         Mach *mach0;
  59         ulong *pgtbl, *rp, fbuf, fbend;
  60
  61         if(scr->mmio)
  62                 return;
  63         p = scr->pci;
  64         if(p == nil)
  65                 return;
  66         scr->mmio = vmap(p->mem[1].bar & ~0x0F, p->mem[1].size);
  67         if(scr->mmio == 0)
  68                 return;
  69         addvgaseg("i81xmmio", p->mem[1].bar&~0x0F, p->mem[1].size);
  70
  71         /* allocate page table */
  72         pgtbl = xspanalloc(64*1024, BY2PG, 0);
  73         scr->mmio[0x2020/4] = PADDR(pgtbl) | 1;
  74
  75         size = p->mem[0].size;
  76         if(size > 0)
  77                 size = Fbsize;
  78         vgalinearaddr(scr, p->mem[0].bar&~0xF, size);
  79         addvgaseg("i81xscreen", p->mem[0].bar&~0xF, size);
  80
  81         /*
  82          * allocate backing store for frame buffer
  83          * and populate device page tables.
  84          */
  85         fbuf = PADDR(xspanalloc(size, BY2PG, 0));
  86         fbend = PGROUND(fbuf+size);
  87         rp = scr->mmio+0x10000/4;
  88         while(fbuf < fbend) {
  89                 *rp++ = fbuf | 1;
  90                 fbuf += BY2PG;
  91         }
  92
  93         scr->storage = 0;
  94         scr->blank = i81xblank;
  95 }
  96
  97 static void
  98 i81xcurdisable(VGAscr* scr)
  99 {
 100         CursorI81x *hwcurs;
 101
 102         if(scr->mmio == 0)
 103                 return;
 104         hwcurs = (void*)((uchar*)scr->mmio+hwCur);
 105         hwcurs->ctl = (1<<4);
 106 }
 107
 108 static void
 109 i81xcurload(VGAscr* scr, Cursor* curs)
 110 {
 111         int y;
 112         uchar *p;
 113         CursorI81x *hwcurs;
 114
 115         if(scr->mmio == 0 || scr->storage == 0)
 116                 return;
 117         hwcurs = (void*)((uchar*)scr->mmio+hwCur);
 118
 119         /*
 120          * Disable the cursor then load the new image in
 121          * the top-left of the 32x32 array.
 122          * Unused portions of the image have been initialised to be
 123          * transparent.
 124          */
 125         hwcurs->ctl = (1<<4);
 126         p = (uchar*)scr->storage;
 127         for(y = 0; y < 16; y += 2) {
 128                 *p++ = ~(curs->clr[2*y]|curs->set[2*y]);
 129                 *p++ = ~(curs->clr[2*y+1]|curs->set[2*y+1]);
 130                 p += 2;
 131                 *p++ = ~(curs->clr[2*y+2]|curs->set[2*y+2]);
 132                 *p++ = ~(curs->clr[2*y+3]|curs->set[2*y+3]);
 133                 p += 2;
 134                 *p++ = curs->set[2*y];
 135                 *p++ = curs->set[2*y+1];
 136                 p += 2;
 137                 *p++ = curs->set[2*y+2];
 138                 *p++ = curs->set[2*y+3];
 139                 p += 2;
 140         }
 141
 142         /*
 143          * Save the cursor hotpoint and enable the cursor.
 144          * The 0,0 cursor point is top-left.
 145          */
 146         scr->offset.x = curs->offset.x;
 147         scr->offset.y = curs->offset.y;
 148         hwcurs->ctl = (1<<4)|1;
 149 }
 150
 151 static int
 152 i81xcurmove(VGAscr* scr, Point p)
 153 {
 154         int x, y;
 155         ulong pos;
 156         CursorI81x *hwcurs;
 157
 158         if(scr->mmio == 0)
 159                 return 1;
 160         hwcurs = (void*)((uchar*)scr->mmio+hwCur);
 161
 162         x = p.x+scr->offset.x;
 163         y = p.y+scr->offset.y;
 164         pos = 0;
 165         if(x < 0) {
 166                 pos |= (1<<15);
 167                 x = -x;
 168         }
 169         if(y < 0) {
 170                 pos |= (1<<31);
 171                 y = -y;
 172         }
 173         pos |= ((y&0x7ff)<<16)|(x&0x7ff);
 174         hwcurs->pos = pos;
 175
 176         return 0;
 177 }
 178
 179 static void
 180 i81xcurenable(VGAscr* scr)
 181 {
 182         int i;
 183         uchar *p;
 184
 185         i81xenable(scr);
 186         if(scr->mmio == 0)
 187                 return;
 188
 189         if(scr->storage == 0){
 190                 CursorI81x *hwcurs;
 191                 Page *pg = newpage(0, nil, 0);
 192                 scr->storage = (uintptr)vmap(pg->pa, BY2PG);
 193                 if(scr->storage == 0){
 194                         putpage(pg);
 195                         return;
 196                 }
 197                 hwcurs = (void*)((uchar*)scr->mmio+hwCur);
 198                 hwcurs->base = pg->pa;
 199         }
 200
 201         /*
 202          * Initialise the 32x32 cursor to be transparent in 2bpp mode.
 203          */
 204         p = (uchar*)scr->storage;
 205         for(i = 0; i < 32/2; i++) {
 206                 memset(p, 0xff, 8);
 207                 memset(p+8, 0, 8);
 208                 p += 16;
 209         }
 210
 211         /*
 212          * Load, locate and enable the 32x32 cursor in 2bpp mode.
 213          */
 214         i81xcurload(scr, &arrow);
 215         i81xcurmove(scr, ZP);
 216 }
 217
 218 VGAdev vgai81xdev = {
 219         "i81x",
 220
 221         i81xenable,
 222         nil,
 223         nil,
 224         nil,
 225 };
 226
 227 VGAcur vgai81xcur = {
 228         "i81xhwgc",
 229
 230         i81xcurenable,
 231         i81xcurdisable,
 232         i81xcurload,
 233         i81xcurmove,
 234 };