1 /* $NetBSD: grf_gv.c,v 1.15 2011/02/08 20:20:25 rmind Exp $ */
2
3 /*
4 * Copyright (c) 1988 University of Utah.
5 * Copyright (c) 1990, 1993
6 * The Regents of the University of California. All rights reserved.
7 *
8 * This code is derived from software contributed to Berkeley by
9 * the Systems Programming Group of the University of Utah Computer
10 * Science Department.
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 * 1. Redistributions of source code must retain the above copyright
16 * notice, this list of conditions and the following disclaimer.
17 * 2. Redistributions in binary form must reproduce the above copyright
18 * notice, this list of conditions and the following disclaimer in the
19 * documentation and/or other materials provided with the distribution.
20 * 3. Neither the name of the University nor the names of its contributors
21 * may be used to endorse or promote products derived from this software
22 * without specific prior written permission.
23 *
24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * SUCH DAMAGE.
35 *
36 * from: Utah $Hdr: grf_tc.c 1.20 93/08/13$
37 *
38 * @(#)grf_tc.c 8.4 (Berkeley) 1/12/94
39 */
40
41 /*
42 * Graphics routines for the X68K native custom chip set.
43 */
44
45 #include <sys/cdefs.h>
46 __KERNEL_RCSID(0, "$NetBSD: grf_gv.c,v 1.15 2011/02/08 20:20:25 rmind Exp $");
47
48 #include <sys/param.h>
49 #include <sys/device.h>
50 #include <sys/errno.h>
51
52 #include <machine/cpu.h>
53 #include <machine/grfioctl.h>
54
55 #include <x68k/dev/grfvar.h>
56 #include <x68k/x68k/iodevice.h>
57
58 int gv_init(struct grf_softc *, void *);
59 int gv_mode(struct grf_softc *, u_long, void *);
60
61 /* Initialize hardware.
62 * Must fill in the grfinfo structure in g_softc.
63 * Returns 0 if hardware not present, non-zero ow.
64 */
65 int
gv_init(struct grf_softc * gp,void * addr)66 gv_init(struct grf_softc *gp, void *addr)
67 {
68 struct grfinfo *gi = &gp->g_display;
69
70 gi->gd_fbwidth = 1024;
71 gi->gd_fbheight = 1024;
72 gi->gd_planes = 4;
73 gi->gd_regaddr = (void *)0x00e80000;
74 gi->gd_regsize = 0x00010000; /* contains system port */
75 gi->gd_fbaddr = (void *)0x00c00000;
76 gi->gd_fbsize = gi->gd_fbwidth * gi->gd_fbheight * 2;
77 gp->g_regkva = addr;
78 gp->g_fbkva = addr;
79 switch(IODEVbase->io_sram[0x1d]) {
80 case 18:
81 /*
82 * mode 18, 24kHz
83 */
84 gi->gd_dwidth = 1024;
85 gi->gd_dheight = 848;
86 break;
87 case 19:
88 /*
89 * mode 19, 31kHz VGA mode
90 */
91 gi->gd_dwidth = 640;
92 gi->gd_dheight = 480;
93 break;
94 default:
95 /*
96 * mode 16, 31kHz (default)
97 */
98 gi->gd_dwidth = 768;
99 gi->gd_dheight = 512;
100 break;
101 }
102 gi->gd_colors = 16;
103
104 return 1;
105 }
106
107 /*
108 * Change the mode of the display.
109 * Right now all we can do is grfon/grfoff.
110 * Return a UNIX error number or 0 for success.
111 */
112 /*ARGSUSED*/
113 int
gv_mode(struct grf_softc * gp,u_long cmd,void * data)114 gv_mode(struct grf_softc *gp, u_long cmd, void *data)
115 {
116 int error = 0;
117
118 switch (cmd) {
119 case GM_GRFON:
120 case GM_GRFOFF:
121 break;
122
123 /*
124 * Remember UVA of mapping for GCDESCRIBE.
125 * XXX this should be per-process.
126 */
127 case GM_MAP:
128 gp->g_data = data;
129 break;
130
131 case GM_UNMAP:
132 gp->g_data = 0;
133 break;
134
135 case GM_GRFSETVMODE:
136 if (*(int *)data == 1) {
137 struct grfinfo *gi = &gp->g_display;
138 volatile struct crtc *crtc = &IODEVbase->io_crtc;
139 /* Reset CRTC, set dwidth and dheight accordingly */
140 crtc->r20 = (crtc->r20 & 0xFF00) | 0x1a;
141 crtc->r08 = 0x1b;
142 crtc->r07 = 0x19c;
143 crtc->r06 = 0x1c;
144 crtc->r05 = 0x02;
145 crtc->r04 = 0x019f;
146 crtc->r03 = 0x9a;
147 crtc->r02 = 0x1a;
148 crtc->r01 = 0x09;
149 crtc->r00 = 0xa4;
150 gi->gd_dwidth = 1024;
151 gi->gd_dheight = 768;
152 }
153 break;
154
155 default:
156 error = EINVAL;
157 break;
158 }
159 return error;
160 }
161