xref: /freebsd/sys/dev/syscons/scvesactl.c (revision 41466b50c1d5bfd1cf6adaae547a579a75d7c04e)
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  * $FreeBSD$
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 #include <sys/fbio.h>
39 #include <sys/consio.h>
40 
41 #include <machine/pc/vesa.h>
42 
43 #include <dev/fb/fbreg.h>
44 #include <dev/syscons/syscons.h>
45 
46 static d_ioctl_t *prev_user_ioctl;
47 
48 static int
49 vesa_ioctl(dev_t dev, u_long cmd, caddr_t data, int flag, struct thread *td)
50 {
51 	scr_stat *scp;
52 	struct tty *tp;
53 	int mode;
54 
55 	tp = dev->si_tty;
56 	if (!tp)
57 		return ENXIO;
58 	scp = SC_STAT(tp->t_dev);
59 
60 	switch (cmd) {
61 
62 	/* generic text modes */
63 	case SW_TEXT_132x25: case SW_TEXT_132x30:
64 	case SW_TEXT_132x43: case SW_TEXT_132x50:
65 	case SW_TEXT_132x60:
66 		if (!(scp->sc->adp->va_flags & V_ADP_MODECHANGE))
67 			return ENODEV;
68 		return sc_set_text_mode(scp, tp, cmd & 0xff, 0, 0, 0);
69 
70 	/* text modes */
71 	case SW_VESA_C80x60:
72 	case SW_VESA_C132x25:
73 	case SW_VESA_C132x43:
74 	case SW_VESA_C132x50:
75 	case SW_VESA_C132x60:
76 		if (!(scp->sc->adp->va_flags & V_ADP_MODECHANGE))
77 			return ENODEV;
78 		mode = (cmd & 0xff) + M_VESA_BASE;
79 		return sc_set_text_mode(scp, tp, mode, 0, 0, 0);
80 
81 	/* graphics modes */
82 	case SW_VESA_32K_320: 	case SW_VESA_64K_320:
83 	case SW_VESA_FULL_320:
84 
85 	case SW_VESA_CG640x400:
86 
87 	case SW_VESA_CG640x480:
88 	case SW_VESA_32K_640:	case SW_VESA_64K_640:
89 	case SW_VESA_FULL_640:
90 
91 	case SW_VESA_800x600:	case SW_VESA_CG800x600:
92 	case SW_VESA_32K_800:	case SW_VESA_64K_800:
93 	case SW_VESA_FULL_800:
94 
95 	case SW_VESA_1024x768:	case SW_VESA_CG1024x768:
96 	case SW_VESA_32K_1024:	case SW_VESA_64K_1024:
97 	case SW_VESA_FULL_1024:
98 
99 	case SW_VESA_1280x1024:	case SW_VESA_CG1280x1024:
100 	case SW_VESA_32K_1280:	case SW_VESA_64K_1280:
101 	case SW_VESA_FULL_1280:
102 		if (!(scp->sc->adp->va_flags & V_ADP_MODECHANGE))
103 			return ENODEV;
104 		mode = (cmd & 0xff) + M_VESA_BASE;
105 		return sc_set_graphics_mode(scp, tp, mode);
106 	}
107 
108 	if (prev_user_ioctl)
109 		return (*prev_user_ioctl)(dev, cmd, data, flag, td);
110 	else
111 		return ENOIOCTL;
112 }
113 
114 int
115 vesa_load_ioctl(void)
116 {
117 	if (prev_user_ioctl)
118 		return EBUSY;
119 	prev_user_ioctl = sc_user_ioctl;
120 	sc_user_ioctl = vesa_ioctl;
121 	return 0;
122 }
123 
124 int
125 vesa_unload_ioctl(void)
126 {
127 	if (sc_user_ioctl != vesa_ioctl)
128 		return EBUSY;
129 	sc_user_ioctl = prev_user_ioctl;
130 	prev_user_ioctl = NULL;
131 	return 0;
132 }
133 
134 #endif	/* SC_NO_MODE_CHANGE */
135