scvesactl.c revision 165927 
1/*-
2 * Copyright (c) 1998 Kazutaka YOKOTA <yokota@zodiac.mech.utsunomiya-u.ac.jp>
3 * All rights reserved.
4 *
5 * This code is derived from software contributed to The DragonFly Project
6 * by Sascha Wildner <saw@online.de>
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 as
13 *    the first lines of this file unmodified.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 *    notice, this list of conditions and the following disclaimer in the
16 *    documentation and/or other materials provided with the distribution.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
23 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 *
29 */
30
31#include <sys/cdefs.h>
32__FBSDID("$FreeBSD: head/sys/dev/syscons/scvesactl.c 165927 2007-01-10 19:04:00Z marius $");
33
34#include "opt_vga.h"
35
36#ifndef VGA_NO_MODE_CHANGE
37
38#include <sys/param.h>
39#include <sys/systm.h>
40#include <sys/conf.h>
41#include <sys/tty.h>
42#include <sys/kernel.h>
43#include <sys/fbio.h>
44#include <sys/consio.h>
45
46#include <machine/pc/vesa.h>
47
48#include <dev/fb/fbreg.h>
49#include <dev/syscons/syscons.h>
50
51static d_ioctl_t *prev_user_ioctl;
52
53static int
54vesa_ioctl(struct cdev *dev, u_long cmd, caddr_t data, int flag, struct thread *td)
55{
56	scr_stat *scp;
57	struct tty *tp;
58	int mode;
59
60	tp = dev->si_tty;
61	if (!tp)
62		return ENXIO;
63	scp = SC_STAT(tp->t_dev);
64
65	switch (cmd) {
66
67	/* generic text modes */
68	case SW_TEXT_132x25: case SW_TEXT_132x30:
69	case SW_TEXT_132x43: case SW_TEXT_132x50:
70	case SW_TEXT_132x60:
71		if (!(scp->sc->adp->va_flags & V_ADP_MODECHANGE))
72			return ENODEV;
73		return sc_set_text_mode(scp, tp, cmd & 0xff, 0, 0, 0, 0);
74
75	/* text modes */
76	case SW_VESA_C80x60:
77	case SW_VESA_C132x25:
78	case SW_VESA_C132x43:
79	case SW_VESA_C132x50:
80	case SW_VESA_C132x60:
81		if (!(scp->sc->adp->va_flags & V_ADP_MODECHANGE))
82			return ENODEV;
83		mode = (cmd & 0xff) + M_VESA_BASE;
84		return sc_set_text_mode(scp, tp, mode, 0, 0, 0, 0);
85
86	/* graphics modes */
87	case SW_VESA_32K_320: 	case SW_VESA_64K_320:
88	case SW_VESA_FULL_320:
89
90	case SW_VESA_CG640x400:
91
92	case SW_VESA_CG640x480:
93	case SW_VESA_32K_640:	case SW_VESA_64K_640:
94	case SW_VESA_FULL_640:
95
96	case SW_VESA_800x600:	case SW_VESA_CG800x600:
97	case SW_VESA_32K_800:	case SW_VESA_64K_800:
98	case SW_VESA_FULL_800:
99
100	case SW_VESA_1024x768:	case SW_VESA_CG1024x768:
101	case SW_VESA_32K_1024:	case SW_VESA_64K_1024:
102	case SW_VESA_FULL_1024:
103
104	case SW_VESA_1280x1024:	case SW_VESA_CG1280x1024:
105	case SW_VESA_32K_1280:	case SW_VESA_64K_1280:
106	case SW_VESA_FULL_1280:
107		if (!(scp->sc->adp->va_flags & V_ADP_MODECHANGE))
108			return ENODEV;
109		mode = (cmd & 0xff) + M_VESA_BASE;
110		return sc_set_graphics_mode(scp, tp, mode);
111	default:
112		if (IOCGROUP(cmd) == 'V') {
113			if (!(scp->sc->adp->va_flags & V_ADP_MODECHANGE))
114				return ENODEV;
115
116			mode = (cmd & 0xff) + M_VESA_BASE;
117
118			if (((cmd & IOC_DIRMASK) == IOC_VOID) &&
119			    (mode > M_VESA_FULL_1280) &&
120			    (mode < M_VESA_MODE_MAX))
121				return sc_set_graphics_mode(scp, tp, mode);
122		}
123	}
124
125	if (prev_user_ioctl)
126		return (*prev_user_ioctl)(dev, cmd, data, flag, td);
127	else
128		return ENOIOCTL;
129}
130
131int
132vesa_load_ioctl(void)
133{
134	if (prev_user_ioctl)
135		return EBUSY;
136	prev_user_ioctl = sc_user_ioctl;
137	sc_user_ioctl = vesa_ioctl;
138	return 0;
139}
140
141int
142vesa_unload_ioctl(void)
143{
144	if (sc_user_ioctl != vesa_ioctl)
145		return EBUSY;
146	sc_user_ioctl = prev_user_ioctl;
147	prev_user_ioctl = NULL;
148	return 0;
149}
150
151#endif /* VGA_NO_MODE_CHANGE */
152