scvesactl.c revision 56836 
1/*-
2 * Copyright (c) 1998 Kazutaka YOKOTA <yokota@zodiac.mech.utsunomiya-u.ac.jp>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer as
10 *    the first lines of this file unmodified.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 *    notice, this list of conditions and the following disclaimer in the
13 *    documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 *
26 * $FreeBSD: head/sys/dev/syscons/scvesactl.c 56836 2000-01-29 15:08:56Z peter $
27 */
28
29#include "opt_vga.h"
30
31#ifndef VGA_NO_MODE_CHANGE
32
33#include <sys/param.h>
34#include <sys/systm.h>
35#include <sys/conf.h>
36#include <sys/tty.h>
37#include <sys/kernel.h>
38
39#include <machine/console.h>
40#include <machine/pc/vesa.h>
41
42#include <dev/fb/fbreg.h>
43#include <dev/syscons/syscons.h>
44
45static d_ioctl_t *prev_user_ioctl;
46
47static int
48vesa_ioctl(dev_t dev, u_long cmd, caddr_t data, int flag, struct proc *p)
49{
50	scr_stat *scp;
51	struct tty *tp;
52	int mode;
53
54	tp = dev->si_tty;
55	if (!tp)
56		return ENXIO;
57	scp = SC_STAT(tp->t_dev);
58
59	switch (cmd) {
60
61	/* generic text modes */
62	case SW_TEXT_132x25: case SW_TEXT_132x30:
63	case SW_TEXT_132x43: case SW_TEXT_132x50:
64	case SW_TEXT_132x60:
65		if (!(scp->sc->adp->va_flags & V_ADP_MODECHANGE))
66			return ENODEV;
67		return sc_set_text_mode(scp, tp, cmd & 0xff, 0, 0, 0);
68
69	/* text modes */
70	case SW_VESA_C80x60:
71	case SW_VESA_C132x25:
72	case SW_VESA_C132x43:
73	case SW_VESA_C132x50:
74	case SW_VESA_C132x60:
75		if (!(scp->sc->adp->va_flags & V_ADP_MODECHANGE))
76			return ENODEV;
77		mode = (cmd & 0xff) + M_VESA_BASE;
78		return sc_set_text_mode(scp, tp, mode, 0, 0, 0);
79
80	/* graphics modes */
81	case SW_VESA_32K_320: 	case SW_VESA_64K_320:
82	case SW_VESA_FULL_320:
83
84	case SW_VESA_CG640x400:
85
86	case SW_VESA_CG640x480:
87	case SW_VESA_32K_640:	case SW_VESA_64K_640:
88	case SW_VESA_FULL_640:
89
90	case SW_VESA_800x600:	case SW_VESA_CG800x600:
91	case SW_VESA_32K_800:	case SW_VESA_64K_800:
92	case SW_VESA_FULL_800:
93
94	case SW_VESA_1024x768:	case SW_VESA_CG1024x768:
95	case SW_VESA_32K_1024:	case SW_VESA_64K_1024:
96	case SW_VESA_FULL_1024:
97
98	case SW_VESA_1280x1024:	case SW_VESA_CG1280x1024:
99	case SW_VESA_32K_1280:	case SW_VESA_64K_1280:
100	case SW_VESA_FULL_1280:
101		if (!(scp->sc->adp->va_flags & V_ADP_MODECHANGE))
102			return ENODEV;
103		mode = (cmd & 0xff) + M_VESA_BASE;
104		return sc_set_graphics_mode(scp, tp, mode);
105	}
106
107	if (prev_user_ioctl)
108		return (*prev_user_ioctl)(dev, cmd, data, flag, p);
109	else
110		return ENOIOCTL;
111}
112
113int
114vesa_load_ioctl(void)
115{
116	if (prev_user_ioctl)
117		return EBUSY;
118	prev_user_ioctl = sc_user_ioctl;
119	sc_user_ioctl = vesa_ioctl;
120	return 0;
121}
122
123int
124vesa_unload_ioctl(void)
125{
126	if (sc_user_ioctl != vesa_ioctl)
127		return EBUSY;
128	sc_user_ioctl = prev_user_ioctl;
129	prev_user_ioctl = NULL;
130	return 0;
131}
132
133#endif	/* SC_NO_MODE_CHANGE */
134