Annotation of sys/arch/sparc/dev/bt_subr.c, Revision 1.1.1.1
1.1 nbrk 1: /* $OpenBSD: bt_subr.c,v 1.9 2003/06/02 23:27:53 millert Exp $ */
2: /* $NetBSD: bt_subr.c,v 1.5 1996/03/14 19:44:32 christos Exp $ */
3:
4: /*
5: * Copyright (c) 1993
6: * The Regents of the University of California. All rights reserved.
7: *
8: * This software was developed by the Computer Systems Engineering group
9: * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
10: * contributed to Berkeley.
11: *
12: * All advertising materials mentioning features or use of this software
13: * must display the following acknowledgement:
14: * This product includes software developed by the University of
15: * California, Lawrence Berkeley Laboratory.
16: *
17: * Redistribution and use in source and binary forms, with or without
18: * modification, are permitted provided that the following conditions
19: * are met:
20: * 1. Redistributions of source code must retain the above copyright
21: * notice, this list of conditions and the following disclaimer.
22: * 2. Redistributions in binary form must reproduce the above copyright
23: * notice, this list of conditions and the following disclaimer in the
24: * documentation and/or other materials provided with the distribution.
25: * 3. Neither the name of the University nor the names of its contributors
26: * may be used to endorse or promote products derived from this software
27: * without specific prior written permission.
28: *
29: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
30: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
31: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
32: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
33: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
34: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
35: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
36: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
37: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
38: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
39: * SUCH DAMAGE.
40: *
41: * @(#)bt_subr.c 8.2 (Berkeley) 1/21/94
42: */
43:
44: #include <sys/param.h>
45: #include <sys/systm.h>
46: #include <sys/buf.h>
47: #include <sys/errno.h>
48:
49: #include <uvm/uvm_extern.h>
50:
51: #include <dev/wscons/wsconsio.h>
52:
53: #include <sparc/dev/btreg.h>
54: #include <sparc/dev/btvar.h>
55:
56: /*
57: * Common code for dealing with Brooktree video DACs.
58: */
59:
60: int
61: bt_getcmap(bcm, rcm)
62: union bt_cmap *bcm;
63: struct wsdisplay_cmap *rcm;
64: {
65: u_int index = rcm->index, count = rcm->count, i;
66: int error;
67:
68: if (index >= 256 || count > 256 - index)
69: return (EINVAL);
70: for (i = 0; i < count; i++) {
71: if ((error = copyout(&bcm->cm_map[index + i][0],
72: &rcm->red[i], 1)) != 0)
73: return (error);
74: if ((error = copyout(&bcm->cm_map[index + i][1],
75: &rcm->green[i], 1)) != 0)
76: return (error);
77: if ((error = copyout(&bcm->cm_map[index + i][2],
78: &rcm->blue[i], 1)) != 0)
79: return (error);
80: }
81: return (0);
82: }
83:
84: int
85: bt_putcmap(bcm, rcm)
86: union bt_cmap *bcm;
87: struct wsdisplay_cmap *rcm;
88: {
89: u_int index = rcm->index, count = rcm->count, i;
90: int error;
91:
92: if (index >= 256 || count > 256 - index)
93: return (EINVAL);
94: for (i = 0; i < count; i++) {
95: if ((error = copyin(&rcm->red[i],
96: &bcm->cm_map[index + i][0], 1)) != 0)
97: return (error);
98: if ((error = copyin(&rcm->green[i],
99: &bcm->cm_map[index + i][1], 1)) != 0)
100: return (error);
101: if ((error = copyin(&rcm->blue[i],
102: &bcm->cm_map[index + i][2], 1)) != 0)
103: return (error);
104: }
105: return (0);
106: }
107:
108: void
109: bt_loadcmap(cm, bt, start, ncolors, cgsix)
110: union bt_cmap *cm;
111: volatile struct bt_regs *bt;
112: u_int start, ncolors;
113: int cgsix;
114: {
115: u_int *ip, i;
116: int count;
117:
118: ip = &cm->cm_chip[BT_D4M3(start)]; /* start/4 * 3 */
119: count = BT_D4M3(start + ncolors - 1) - BT_D4M3(start) + 3;
120:
121: if (cgsix) {
122: /* hardware that makes one want to pound boards with hammers */
123: bt->bt_addr = BT_D4M4(start) << 24;
124: while (--count >= 0) {
125: i = *ip++;
126: bt->bt_cmap = i;
127: bt->bt_cmap = i << 8;
128: bt->bt_cmap = i << 16;
129: bt->bt_cmap = i << 24;
130: }
131: } else {
132: bt->bt_addr = BT_D4M4(start);
133: while (--count >= 0)
134: bt->bt_cmap = *ip++;
135: }
136: }
137:
138: void
139: bt_setcolor(cm, bt, index, r, g, b, cgsix)
140: union bt_cmap *cm;
141: volatile struct bt_regs *bt;
142: u_int index;
143: u_int8_t r, g, b;
144: int cgsix;
145: {
146:
147: cm->cm_map[index][0] = r;
148: cm->cm_map[index][1] = g;
149: cm->cm_map[index][2] = b;
150: bt_loadcmap(cm, bt, index, 1, cgsix);
151: }
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