video/tnt2.c

   1 #include <minilib.h>
   2 #include <io.h>
   3 #include <pci.h>
   4 #include <output.h>
   5 #include <fb.h>
   6 #include <paging.h>
   7
   8 #include "checksumrect.h"
   9
  10 static void tnt2_getvmode(void *priv);
  11
  12 static struct fbdevice tnt2_fb = {
  13         .getvmode = &tnt2_getvmode,
  14 };
  15
  16 static unsigned int vgard(unsigned char a)
  17 {
  18         outb(0x3D4, a);
  19         return (unsigned int)inb(0x3D5);
  20 }
  21
  22 static void tnt2_getvmode(void *priv)
  23 {
  24         tnt2_fb.curmode.xres = (vgard(0x1) + 1) * 8;
  25         tnt2_fb.curmode.yres = (vgard(0x12) | (vgard(0x7) & 2) << 7 | (vgard(0x7) & 0x40) << 3) + 1;
  26         switch (vgard(0x28))
  27         {
  28         case 3:
  29                 tnt2_fb.curmode.format = FB_RGB888;
  30                 tnt2_fb.curmode.bytestride = 4;
  31                 tnt2_fb.curmode.text = 0;
  32                 tnt2_fb.checksum_rect = checksum_rect_generic32;
  33                 break;
  34         case 0:
  35                 tnt2_fb.curmode.text = 1;
  36                 tnt2_fb.checksum_rect = (checksum_rect_t) 0;
  37                 break;
  38         default:
  39                 tnt2_fb.curmode.text = 1;
  40                 tnt2_fb.checksum_rect = (checksum_rect_t) 0;
  41                 outputf("Unknown TNT2 format %x", vgard(0x28));
  42                 break;
  43         }
  44 }
  45
  46 static int tnt2_probe(struct pci_dev *pci, void *data)
  47 {
  48         unsigned int p;
  49
  50         if (pci->bars[1].type != PCI_BAR_MEMORY32)
  51         {
  52                 output("TNT2 BAR1 is not memory32?");
  53                 return 0;
  54         }
  55
  56         /* Map 32M of memory. */
  57         for (p = 0; p < 32; p += 4)
  58                 addmap_4m(0x40000000 + p*1024*1024, pci->bars[1].addr + p*1024*1024);
  59         tnt2_fb.fbaddr = (void *)0x40000000;
  60
  61         fb = &tnt2_fb;
  62         outputf("Found TNT2 with FB at %08x, mapped to %08x", pci->bars[1].addr, tnt2_fb.fbaddr);
  63         return 1;
  64 }
  65
  66 static struct pci_id tnt2_pci[] = {
  67         {0x10DE, 0x0028, "TNT2", "RIVA TNT2"}
  68 };
  69
  70 struct pci_driver tnt2_driver = {
  71         .name     = "tnt2",
  72         .probe    = tnt2_probe,
  73         .ids      = tnt2_pci,
  74         .id_count = sizeof(tnt2_pci)/sizeof(tnt2_pci[0]),
  75 };