Line data Source code
1 : /* $OpenBSD: vga_subr.c,v 1.5 2015/07/18 00:48:05 miod Exp $ */
2 : /* $NetBSD: vga_subr.c,v 1.6 2000/01/25 02:44:03 ad Exp $ */
3 :
4 : /*
5 : * Copyright (c) 1998
6 : * Matthias Drochner. All rights reserved.
7 : *
8 : * Redistribution and use in source and binary forms, with or without
9 : * modification, are permitted provided that the following conditions
10 : * are met:
11 : * 1. Redistributions of source code must retain the above copyright
12 : * notice, this list of conditions and the following disclaimer.
13 : * 2. Redistributions in binary form must reproduce the above copyright
14 : * notice, this list of conditions and the following disclaimer in the
15 : * documentation and/or other materials provided with the distribution.
16 : *
17 : * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18 : * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 : * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 : * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 : * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 : * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 : * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 : * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 : * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 : * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 : *
28 : */
29 :
30 : #include <sys/param.h>
31 : #include <sys/systm.h>
32 : #include <sys/device.h>
33 : #include <sys/queue.h>
34 : #include <machine/bus.h>
35 :
36 : #include <dev/ic/mc6845reg.h>
37 : #include <dev/ic/pcdisplayvar.h>
38 : #include <dev/ic/vgareg.h>
39 :
40 : #include <dev/wscons/wsdisplayvar.h>
41 : #include <dev/ic/vgavar.h>
42 :
43 : static void fontram(struct vga_handle *);
44 : static void textram(struct vga_handle *);
45 :
46 : static void
47 0 : fontram(struct vga_handle *vh)
48 : {
49 : /* program sequencer to access character generator */
50 :
51 0 : vga_ts_write(vh, syncreset, 0x01); /* synchronous reset */
52 0 : vga_ts_write(vh, wrplmask, 0x04); /* write to map 2 */
53 0 : vga_ts_write(vh, memmode, 0x07); /* sequential addressing */
54 0 : vga_ts_write(vh, syncreset, 0x03); /* clear synchronous reset */
55 :
56 : /* program graphics controller to access character generator */
57 :
58 0 : vga_gdc_write(vh, rdplanesel, 0x02); /* select map 2 for cpu reads */
59 0 : vga_gdc_write(vh, mode, 0x00); /* disable odd-even addressing */
60 0 : vga_gdc_write(vh, misc, 0x04); /* map starts at 0xA000 */
61 0 : }
62 :
63 : static void
64 0 : textram(struct vga_handle *vh)
65 : {
66 : /* program sequencer to access video ram */
67 :
68 0 : vga_ts_write(vh, syncreset, 0x01); /* synchronous reset */
69 0 : vga_ts_write(vh, wrplmask, 0x03); /* write to map 0 & 1 */
70 0 : vga_ts_write(vh, memmode, 0x03); /* odd-even addressing */
71 0 : vga_ts_write(vh, syncreset, 0x03); /* clear synchronous reset */
72 :
73 : /* program graphics controller for text mode */
74 :
75 0 : vga_gdc_write(vh, rdplanesel, 0x00); /* select map 0 for cpu reads */
76 0 : vga_gdc_write(vh, mode, 0x10); /* enable odd-even addressing */
77 : /* map starts at 0xb800 or 0xb000 (mono) */
78 0 : vga_gdc_write(vh, misc, (vh->vh_mono ? 0x0a : 0x0e));
79 0 : }
80 :
81 : void
82 0 : vga_loadchars(struct vga_handle *vh, int fontset, int first, int num, int lpc,
83 : char *data)
84 : {
85 : int offset, i, j, s;
86 :
87 : /* fontset number swizzle done in vga_setfontset() */
88 0 : offset = (fontset << 13) | (first << 5);
89 :
90 0 : s = splhigh();
91 0 : fontram(vh);
92 :
93 0 : for (i = 0; i < num; i++)
94 0 : for (j = 0; j < lpc; j++)
95 0 : bus_space_write_1(vh->vh_memt, vh->vh_allmemh,
96 : offset + (i << 5) + j,
97 : data[i * lpc + j]);
98 :
99 0 : textram(vh);
100 0 : splx(s);
101 0 : }
102 :
103 : void
104 0 : vga_setfontset(struct vga_handle *vh, int fontset1, int fontset2)
105 : {
106 : u_int8_t cmap;
107 : static const u_int8_t cmaptaba[] = {
108 : 0x00, 0x10, 0x01, 0x11,
109 : 0x02, 0x12, 0x03, 0x13
110 : };
111 : static const u_int8_t cmaptabb[] = {
112 : 0x00, 0x20, 0x04, 0x24,
113 : 0x08, 0x28, 0x0c, 0x2c
114 : };
115 :
116 : /* extended font if fontset1 != fontset2 */
117 0 : cmap = cmaptaba[fontset1] | cmaptabb[fontset2];
118 :
119 0 : vga_ts_write(vh, fontsel, cmap);
120 0 : }
121 :
122 : void
123 0 : vga_setscreentype(struct vga_handle *vh, const struct wsscreen_descr *type)
124 : {
125 0 : vga_6845_write(vh, maxrow, type->fontheight - 1);
126 :
127 : /* lo byte */
128 0 : vga_6845_write(vh, vde, type->fontheight * type->nrows - 1);
129 :
130 : #ifndef PCDISPLAY_SOFTCURSOR
131 : /* set cursor to last 2 lines */
132 0 : vga_6845_write(vh, curstart, type->fontheight - 2);
133 0 : vga_6845_write(vh, curend, type->fontheight - 1);
134 : #endif
135 : /*
136 : * disable colour plane 3 if needed for font selection
137 : */
138 0 : if (type->capabilities & WSSCREEN_HILIT) {
139 : /*
140 : * these are the screens which don't support
141 : * 512-character fonts
142 : */
143 0 : vga_attr_write(vh, colplen, 0x0f);
144 0 : } else
145 0 : vga_attr_write(vh, colplen, 0x07);
146 0 : }
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