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/ics2494.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 
/*
2 
 * Integrated Circuit Systems, Inc.
3 
 * ICS2494[A] Dual Video/Memory Clock Generator.
4 
 */
5 
#include <u.h>
6 
#include <libc.h>
7 
#include <bio.h>
8 
 
9 
#include "pci.h"
10 
#include "vga.h"
11 
 
12 
typedef struct {
13 
	char*	name[2];
14 
	ulong	frequency[16];
15 
} Pattern;
16 
 
17 
static Pattern patterns[] = {
18 
	{ "237", "304",
19 
	 50350000,  56644000,  65000000,  72000000,  80000000,  89800000,  63000000,  75000000,
20 
	 25175000,  28322000,  31500000,  36000000,  40000000,  44900000,  50000000,  65000000,
21 
	},
22 
 
23 
	{ "324", 0,
24 
	 50350000,  56644000,  65000000,  72000000,  80000000,  89800000,  63000000,  75000000,
25 
	 83078000,  93463000, 100000000, 104000000, 108000000, 120000000, 130000000, 134700000,
26 
	},
27 
 
28 
	{ 0,
29 
	},
30 
};
31 
 
32 
static void
33 
init(Vga* vga, Ctlr* ctlr)
34 
{
35 
	Pattern *pattern;
36 
	char *p;
37 
	int f, index, divisor, maxdivisor;
38 
 
39 
	if(ctlr->flag & Finit)
40 
		return;
41 
 
42 
	if(vga->f[0] == 0)
43 
		vga->f[0] = vga->mode->frequency;
44 
 
45 
	if((p = strchr(ctlr->name, '-')) == 0)
46 
		error("%s: unknown pattern\n", ctlr->name);
47 
	p++;
48 
 
49 
	for(pattern = patterns; pattern->name[0]; pattern++){
50 
		if(strcmp(pattern->name[0], p) == 0)
51 
			break;
52 
		if(pattern->name[1] && strcmp(pattern->name[1], p) == 0)
53 
			break;
54 
	}
55 
	if(pattern->name[0] == 0)
56 
		error("%s: unknown pattern\n", ctlr->name);
57 
 
58 
	maxdivisor = 1;
59 
	if(vga->ctlr && (vga->ctlr->flag & Hclkdiv))
60 
		maxdivisor = 8;
61 
	for(index = 0; index < 16; index++){
62 
		for(divisor = 1; divisor <= maxdivisor; divisor <<= 1){
63 
			f = vga->f[0] - pattern->frequency[index]/divisor;
64 
			if(f < 0)
65 
				f = -f;
66 
			if(f < 1000000){
67 
				/*vga->f = pattern->frequency[index];*/
68 
				vga->d[0] = divisor;
69 
				vga->i[0] = index;
70 
 
71 
				ctlr->flag |= Finit;
72 
				return;
73 
			}
74 
		}
75 
	}
76 
	error("%s: can't find frequency %ld\n", ctlr->name, vga->f[0]);
77 
}
78 
 
79 
Ctlr ics2494 = {
80 
	"ics2494",			/* name */
81 
	0,				/* snarf */
82 
	0,				/* options */
83 
	init,				/* init */
84 
	0,				/* load */
85 
	0,				/* dump */
86 
};
87 
 
88 
Ctlr ics2494a = {
89 
	"ics2494a",			/* name */
90 
	0,				/* snarf */
91 
	0,				/* options */
92 
	init,				/* init */
93 
	0,				/* load */
94 
	0,				/* dump */
95 
};