1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
|
/* $OpenBSD: vga_subr.c,v 1.3 2004/04/02 04:39:50 deraadt Exp $ */
/* $NetBSD: vga_subr.c,v 1.6 2000/01/25 02:44:03 ad Exp $ */
/*
* Copyright (c) 1998
* Matthias Drochner. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/device.h>
#include <sys/queue.h>
#include <machine/bus.h>
#include <dev/ic/mc6845reg.h>
#include <dev/ic/pcdisplayvar.h>
#include <dev/ic/vgareg.h>
#include <dev/ic/vgavar.h>
#include <dev/wscons/wsdisplayvar.h>
static void fontram(struct vga_handle *);
static void textram(struct vga_handle *);
static void
fontram(vh)
struct vga_handle *vh;
{
/* program sequencer to access character generator */
vga_ts_write(vh, syncreset, 0x01); /* synchronous reset */
vga_ts_write(vh, wrplmask, 0x04); /* write to map 2 */
vga_ts_write(vh, memmode, 0x07); /* sequential addressing */
vga_ts_write(vh, syncreset, 0x03); /* clear synchronous reset */
/* program graphics controller to access character generator */
vga_gdc_write(vh, rdplanesel, 0x02); /* select map 2 for cpu reads */
vga_gdc_write(vh, mode, 0x00); /* disable odd-even addressing */
vga_gdc_write(vh, misc, 0x04); /* map starts at 0xA000 */
}
static void
textram(vh)
struct vga_handle *vh;
{
/* program sequencer to access video ram */
vga_ts_write(vh, syncreset, 0x01); /* synchronous reset */
vga_ts_write(vh, wrplmask, 0x03); /* write to map 0 & 1 */
vga_ts_write(vh, memmode, 0x03); /* odd-even addressing */
vga_ts_write(vh, syncreset, 0x03); /* clear synchronous reset */
/* program graphics controller for text mode */
vga_gdc_write(vh, rdplanesel, 0x00); /* select map 0 for cpu reads */
vga_gdc_write(vh, mode, 0x10); /* enable odd-even addressing */
/* map starts at 0xb800 or 0xb000 (mono) */
vga_gdc_write(vh, misc, (vh->vh_mono ? 0x0a : 0x0e));
}
void
vga_loadchars(vh, fontset, first, num, lpc, data)
struct vga_handle *vh;
int fontset, first, num;
int lpc;
char *data;
{
int offset, i, j, s;
/* fontset number swizzle done in vga_setfontset() */
offset = (fontset << 13) | (first << 5);
s = splhigh();
fontram(vh);
for (i = 0; i < num; i++)
for (j = 0; j < lpc; j++)
bus_space_write_1(vh->vh_memt, vh->vh_allmemh,
offset + (i << 5) + j,
data[i * lpc + j]);
textram(vh);
splx(s);
}
void
vga_setfontset(vh, fontset1, fontset2)
struct vga_handle *vh;
int fontset1, fontset2;
{
u_int8_t cmap;
static u_int8_t cmaptaba[] = {
0x00, 0x10, 0x01, 0x11,
0x02, 0x12, 0x03, 0x13
};
static u_int8_t cmaptabb[] = {
0x00, 0x20, 0x04, 0x24,
0x08, 0x28, 0x0c, 0x2c
};
/* extended font if fontset1 != fontset2 */
cmap = cmaptaba[fontset1] | cmaptabb[fontset2];
vga_ts_write(vh, fontsel, cmap);
}
void
vga_setscreentype(vh, type)
struct vga_handle *vh;
const struct wsscreen_descr *type;
{
vga_6845_write(vh, maxrow, type->fontheight - 1);
/* lo byte */
vga_6845_write(vh, vde, type->fontheight * type->nrows - 1);
#ifndef PCDISPLAY_SOFTCURSOR
/* set cursor to last 2 lines */
vga_6845_write(vh, curstart, type->fontheight - 2);
vga_6845_write(vh, curend, type->fontheight - 1);
#endif
/*
* disable colour plane 3 if needed for font selection
*/
if (type->capabilities & WSSCREEN_HILIT) {
/*
* these are the screens which don't support
* 512-character fonts
*/
vga_attr_write(vh, colplen, 0x0f);
} else
vga_attr_write(vh, colplen, 0x07);
}
|
