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1 /* tnt2.c
2  * NVidia TNT2 driver.
3  * NetWatch system management mode administration console
4  *
5  * Copyright (c) 2008 Jacob Potter and Joshua Wise.  All rights reserved.
6  * This program is free software; you can redistribute and/or modify it under
7  * the terms found in the file LICENSE in the root of this source tree.
8  *
9  */
10
11 #include <minilib.h>
12 #include <io.h>
13 #include <pci.h>
14 #include <output.h>
15 #include <fb.h>
16 #include <paging.h>
17 #include <text.h>
18
19 #include "generic.h"
20
21 static void tnt2_getvmode(void *priv);
22
23 static struct fbdevice tnt2_fb = {
24         .getvmode = &tnt2_getvmode,
25 };
26
27 static unsigned int vgard(unsigned char a)
28 {
29         outb(0x3D4, a);
30         return (unsigned int)inb(0x3D5);
31 }
32
33 static void tnt2_getvmode(void *priv)
34 {
35         tnt2_fb.curmode.xres = (vgard(0x1) + 1) * 8;
36         tnt2_fb.curmode.yres = (vgard(0x12) | (vgard(0x7) & 2) << 7 | (vgard(0x7) & 0x40) << 3) + 1;
37         switch (vgard(0x28))
38         {
39         case 3:
40                 tnt2_fb.curmode.format = FB_RGB888;
41                 tnt2_fb.curmode.bytestride = 4;
42                 tnt2_fb.curmode.text = 0;
43                 tnt2_fb.checksum_rect = checksum_rect_generic32;
44                 tnt2_fb.copy_pixels = copy_pixels_generic32;
45                 break;
46         case 0:
47                 tnt2_fb.curmode.text = 1;
48                 tnt2_fb.checksum_rect = text_checksum;
49                 tnt2_fb.copy_pixels = text_render;
50                 break;
51         default:
52                 tnt2_fb.curmode.text = 1;
53                 tnt2_fb.checksum_rect = text_checksum;
54                 tnt2_fb.copy_pixels = text_render;
55                 outputf("Unknown TNT2 format %x", vgard(0x28));
56                 break;
57         }
58 }
59
60 static int tnt2_probe(struct pci_dev *pci, void *data)
61 {
62         unsigned int p;
63
64         if (pci->bars[1].type != PCI_BAR_MEMORY32)
65         {
66                 output("TNT2 BAR1 is not memory32?");
67                 return 0;
68         }
69         
70         /* Map 32M of memory. */
71         for (p = 0; p < 32; p += 4)
72                 addmap_4m(0x40000000 + p*1024*1024, pci->bars[1].addr + p*1024*1024);
73         tnt2_fb.fbaddr = (void *)0x40000000;
74         
75         fb = &tnt2_fb;
76         outputf("Found TNT2 with FB at %08x, mapped to %08x", pci->bars[1].addr, tnt2_fb.fbaddr);
77         return 1;
78 }
79
80 static struct pci_id tnt2_pci[] = {
81         {0x10DE, 0x0028, "TNT2", "RIVA TNT2"}
82 };
83
84 struct pci_driver tnt2_driver = {
85         .name     = "tnt2",
86         .probe    = tnt2_probe,
87         .ids      = tnt2_pci,
88         .id_count = sizeof(tnt2_pci)/sizeof(tnt2_pci[0]),
89 };
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