]> Joshua Wise's Git repositories - netwatch.git/blob - video/tnt2.c
add checksumrect utilities
[netwatch.git] / 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                 break;
37         default:
38                 tnt2_fb.curmode.text = 1;
39                 outputf("Unknown TNT2 format %x", vgard(0x28));
40                 break;
41         }
42 }
43
44 static int tnt2_probe(struct pci_dev *pci, void *data)
45 {
46         unsigned int p;
47
48         if (pci->bars[1].type != PCI_BAR_MEMORY32)
49         {
50                 output("TNT2 BAR1 is not memory32?");
51                 return 0;
52         }
53         
54         /* Map 32M of memory. */
55         for (p = 0; p < 32; p += 4)
56                 addmap_4m(0x40000000 + p*1024*1024, pci->bars[1].addr + p*1024*1024);
57         tnt2_fb.fbaddr = (void *)0x40000000;
58         
59         fb = &tnt2_fb;
60         outputf("Found TNT2 with FB at %08x, mapped to %08x", pci->bars[1].addr, tnt2_fb.fbaddr);
61         return 1;
62 }
63
64 static struct pci_id tnt2_pci[] = {
65         {0x10DE, 0x0028, "TNT2", "RIVA TNT2"}
66 };
67
68 struct pci_driver tnt2_driver = {
69         .name     = "tnt2",
70         .probe    = tnt2_probe,
71         .ids      = tnt2_pci,
72         .id_count = sizeof(tnt2_pci)/sizeof(tnt2_pci[0]),
73 };
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