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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#include <text.h>
8
9#include "generic.h"
10
11static void tnt2_getvmode(void *priv);
12
13static struct fbdevice tnt2_fb = {
14 .getvmode = &tnt2_getvmode,
15};
16
17static unsigned int vgard(unsigned char a)
18{
19 outb(0x3D4, a);
20 return (unsigned int)inb(0x3D5);
21}
22
23static void tnt2_getvmode(void *priv)
24{
25 tnt2_fb.curmode.xres = (vgard(0x1) + 1) * 8;
26 tnt2_fb.curmode.yres = (vgard(0x12) | (vgard(0x7) & 2) << 7 | (vgard(0x7) & 0x40) << 3) + 1;
27 switch (vgard(0x28))
28 {
29 case 3:
30 tnt2_fb.curmode.format = FB_RGB888;
31 tnt2_fb.curmode.bytestride = 4;
32 tnt2_fb.curmode.text = 0;
33 tnt2_fb.checksum_rect = checksum_rect_generic32;
34 tnt2_fb.copy_pixels = copy_pixels_generic32;
35 break;
36 case 0:
37 tnt2_fb.curmode.text = 1;
38 tnt2_fb.checksum_rect = text_checksum;
39 tnt2_fb.copy_pixels = text_render;
40 break;
41 default:
42 tnt2_fb.curmode.text = 1;
43 tnt2_fb.checksum_rect = text_checksum;
44 tnt2_fb.copy_pixels = text_render;
45 outputf("Unknown TNT2 format %x", vgard(0x28));
46 break;
47 }
48}
49
50static int tnt2_probe(struct pci_dev *pci, void *data)
51{
52 unsigned int p;
53
54 if (pci->bars[1].type != PCI_BAR_MEMORY32)
55 {
56 output("TNT2 BAR1 is not memory32?");
57 return 0;
58 }
59
60 /* Map 32M of memory. */
61 for (p = 0; p < 32; p += 4)
62 addmap_4m(0x40000000 + p*1024*1024, pci->bars[1].addr + p*1024*1024);
63 tnt2_fb.fbaddr = (void *)0x40000000;
64
65 fb = &tnt2_fb;
66 outputf("Found TNT2 with FB at %08x, mapped to %08x", pci->bars[1].addr, tnt2_fb.fbaddr);
67 return 1;
68}
69
70static struct pci_id tnt2_pci[] = {
71 {0x10DE, 0x0028, "TNT2", "RIVA TNT2"}
72};
73
74struct pci_driver tnt2_driver = {
75 .name = "tnt2",
76 .probe = tnt2_probe,
77 .ids = tnt2_pci,
78 .id_count = sizeof(tnt2_pci)/sizeof(tnt2_pci[0]),
79};
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