Warning: Attempt to read property "date" on null in /usr/local/www/websvn.planix.org/blame.php on line 247

Warning: Attempt to read property "msg" on null in /usr/local/www/websvn.planix.org/blame.php on line 247
WebSVN – planix.SVN – Blame – /os/branches/feature_posix/sys/src/cmd/aux/vga/att20c49x.c – Rev 2

Subversion Repositories planix.SVN

Rev

Go to most recent revision | Details | Last modification | View Log | RSS feed

Rev Author Line No. Line
2 - 1 
#include <u.h>
2 
#include <libc.h>
3 
#include <bio.h>
4 
 
5 
#include "pci.h"
6 
#include "vga.h"
7 
 
8 
/*
9 
 * ATT20C490 and ATT20C49[12] True-Color CMOS RAMDACs.
10 
 */
11 
enum {
12 
	Cr0		= 0x00,		/* Control register 0 */
13 
};
14 
 
15 
static void
16 
init(Vga* vga, Ctlr* ctlr)
17 
{
18 
	ulong pclk;
19 
	char *p;
20 
 
21 
	/*
22 
	 * Part comes in -100, -80, -65 and -55MHz speed-grades.
23 
	 * Work out the part speed-grade from name.  Name can have,
24 
	 * e.g. '-100' on the end  for 100MHz part.
25 
	 */
26 
	pclk = 55000000;
27 
	if(p = strrchr(ctlr->name, '-'))
28 
		pclk = strtoul(p+1, 0, 0) * 1000000;
29 
 
30 
	/*
31 
	 * If we don't already have a desired pclk,
32 
	 * take it from the mode.
33 
	 * Check it's within range.
34 
	 */
35 
	if(vga->f == 0)
36 
		vga->f[0] = vga->mode->frequency;
37 
	if(vga->f[0] > pclk)
38 
		error("%s: invalid pclk - %ld\n", ctlr->name, vga->f[0]);
39 
}
40 
 
41 
static void
42 
load(Vga* vga, Ctlr* ctlr)
43 
{
44 
	uchar mode, x;
45 
 
46 
	/*
47 
	 * Put the chip to sleep if possible.
48 
	 */
49 
	if(ctlr->name[8] == '1'){
50 
		x = attdaci(Cr0);
51 
		attdaco(Cr0, x|0x04);
52 
	}
53 
 
54 
	/*
55 
	 * Set the mode in the RAMDAC, setting 6/8-bit colour
56 
	 * as appropriate and waking the chip back up.
57 
	 */
58 
	mode = 0x00;
59 
	if(vga->mode->z == 8 && ctlr->name[8] == '1' && 0)
60 
		mode |= 0x02;
61 
	attdaco(Cr0, mode);
62 
}
63 
 
64 
static void
65 
dump(Vga*, Ctlr* ctlr)
66 
{
67 
	printitem(ctlr->name, "Cr0");
68 
	printreg(attdaci(Cr0));
69 
}
70 
 
71 
Ctlr att20c490 = {
72 
	"att20c490",			/* name */
73 
	0,				/* snarf */
74 
	0,				/* options */
75 
	init,				/* init */
76 
	load,				/* load */
77 
	dump,				/* dump */
78 
};
79 
 
80 
Ctlr att20c491 = {
81 
	"att20c491",			/* name */
82 
	0,				/* snarf */
83 
	0,				/* options */
84 
	init,				/* init */
85 
	load,				/* load */
86 
	dump,				/* dump */
87 
};
88 
 
89 
Ctlr att20c492 = {
90 
	"att20c492",			/* name */
91 
	0,				/* snarf */
92 
	0,				/* options */
93 
	init,				/* init */
94 
	load,				/* load */
95 
	dump,				/* dump */
96 
};