syscons_isa.c revision 105312 
1/*-
2 * Copyright (c) 1999 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 AUTHORS ``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 AUTHORS 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/isa/syscons_isa.c 105312 2002-10-17 07:04:31Z iwasaki $
27 */
28
29#include "opt_syscons.h"
30
31#include <sys/param.h>
32#include <sys/systm.h>
33#include <sys/kernel.h>
34#include <sys/module.h>
35#include <sys/bus.h>
36#include <sys/cons.h>
37#include <sys/kbio.h>
38#include <sys/consio.h>
39
40
41#ifdef __i386__
42
43#include <machine/clock.h>
44#include <machine/md_var.h>
45#include <machine/pc/bios.h>
46
47#include <vm/vm.h>
48#include <vm/pmap.h>
49
50#include <i386/isa/timerreg.h>
51
52#define BIOS_CLKED	(1 << 6)
53#define BIOS_NLKED	(1 << 5)
54#define BIOS_SLKED	(1 << 4)
55#define BIOS_ALKED	0
56
57#endif /* __i386__ */
58
59#include <dev/syscons/syscons.h>
60
61#include <isa/isareg.h>
62#include <isa/isavar.h>
63
64static devclass_t	sc_devclass;
65
66static sc_softc_t main_softc;
67
68static void
69scidentify (driver_t *driver, device_t parent)
70{
71	BUS_ADD_CHILD(parent, ISA_ORDER_SPECULATIVE, "sc", 0);
72}
73
74static int
75scprobe(device_t dev)
76{
77	/* No pnp support */
78	if (isa_get_vendorid(dev))
79		return (ENXIO);
80
81	device_set_desc(dev, "System console");
82	return sc_probe_unit(device_get_unit(dev), device_get_flags(dev));
83}
84
85static int
86scattach(device_t dev)
87{
88	return sc_attach_unit(device_get_unit(dev), device_get_flags(dev));
89}
90
91static int	sc_cur_scr;
92
93static int
94scsuspend(device_t dev)
95{
96#ifndef SC_NO_SUSPEND_VTYSWITCH
97	int		retry = 10;
98	static int	dummy;
99	sc_softc_t	*sc;
100
101	sc = &main_softc;
102	sc_cur_scr = sc->cur_scp->index;
103	do {
104		sc_switch_scr(sc, 0);
105		if (!sc->switch_in_progress) {
106			break;
107		}
108		tsleep(&dummy, 0, "scsuspend", 100);
109	} while (retry--);
110
111#endif
112	return (0);
113}
114
115static int
116scresume(device_t dev)
117{
118#ifndef SC_NO_SUSPEND_VTYSWITCH
119	sc_softc_t	*sc;
120
121	sc = &main_softc;
122	sc_switch_scr(sc, sc_cur_scr);
123
124#endif
125	return (0);
126}
127
128int
129sc_max_unit(void)
130{
131	return devclass_get_maxunit(sc_devclass);
132}
133
134sc_softc_t
135*sc_get_softc(int unit, int flags)
136{
137	sc_softc_t *sc;
138
139	if (unit < 0)
140		return NULL;
141	if (flags & SC_KERNEL_CONSOLE) {
142		/* FIXME: clear if it is wired to another unit! */
143		sc = &main_softc;
144	} else {
145	        sc = (sc_softc_t *)device_get_softc(devclass_get_device(sc_devclass, unit));
146		if (sc == NULL)
147			return NULL;
148	}
149	sc->unit = unit;
150	if (!(sc->flags & SC_INIT_DONE)) {
151		sc->keyboard = -1;
152		sc->adapter = -1;
153		sc->cursor_char = SC_CURSOR_CHAR;
154		sc->mouse_char = SC_MOUSE_CHAR;
155	}
156	return sc;
157}
158
159sc_softc_t
160*sc_find_softc(struct video_adapter *adp, struct keyboard *kbd)
161{
162	sc_softc_t *sc;
163	int units;
164	int i;
165
166	sc = &main_softc;
167	if (((adp == NULL) || (adp == sc->adp))
168	    && ((kbd == NULL) || (kbd == sc->kbd)))
169		return sc;
170	units = devclass_get_maxunit(sc_devclass);
171	for (i = 0; i < units; ++i) {
172	        sc = (sc_softc_t *)device_get_softc(devclass_get_device(sc_devclass, i));
173		if (sc == NULL)
174			continue;
175		if (((adp == NULL) || (adp == sc->adp))
176		    && ((kbd == NULL) || (kbd == sc->kbd)))
177			return sc;
178	}
179	return NULL;
180}
181
182int
183sc_get_cons_priority(int *unit, int *flags)
184{
185	int disabled;
186	const char *at;
187	int u, f;
188
189	*unit = -1;
190	for (u = 0; u < 16; u++) {
191		if ((resource_int_value(SC_DRIVER_NAME, u, "disabled",
192					&disabled) == 0) && disabled)
193			continue;
194		if (resource_string_value(SC_DRIVER_NAME, u, "at", &at) != 0)
195			continue;
196		if (resource_int_value(SC_DRIVER_NAME, u, "flags", &f) != 0)
197			f = 0;
198		if (f & SC_KERNEL_CONSOLE) {
199			/* the user designates this unit to be the console */
200			*unit = u;
201			*flags = f;
202			break;
203		}
204		if (*unit < 0) {
205			/* ...otherwise remember the first found unit */
206			*unit = u;
207			*flags = f;
208		}
209	}
210	if (*unit < 0)
211		return CN_DEAD;
212#if 0
213	return ((*flags & SC_KERNEL_CONSOLE) ? CN_INTERNAL : CN_NORMAL);
214#endif
215	return CN_INTERNAL;
216}
217
218void
219sc_get_bios_values(bios_values_t *values)
220{
221#ifdef __i386__
222	u_int8_t shift;
223
224	values->cursor_start = *(u_int8_t *)BIOS_PADDRTOVADDR(0x461);
225	values->cursor_end = *(u_int8_t *)BIOS_PADDRTOVADDR(0x460);
226	shift = *(u_int8_t *)BIOS_PADDRTOVADDR(0x417);
227	values->shift_state = ((shift & BIOS_CLKED) ? CLKED : 0)
228			       | ((shift & BIOS_NLKED) ? NLKED : 0)
229			       | ((shift & BIOS_SLKED) ? SLKED : 0)
230			       | ((shift & BIOS_ALKED) ? ALKED : 0);
231	values->bell_pitch = BELL_PITCH;
232#else /* !__i386__ */
233	values->cursor_start = 0;
234	values->cursor_end = 32;
235	values->shift_state = 0;
236	values->bell_pitch = BELL_PITCH;
237#endif /* __i386__ */
238}
239
240int
241sc_tone(int herz)
242{
243#ifdef __i386__
244	int pitch;
245
246	if (herz) {
247		/* set command for counter 2, 2 byte write */
248		if (acquire_timer2(TIMER_16BIT | TIMER_SQWAVE))
249			return EBUSY;
250		/* set pitch */
251		pitch = timer_freq/herz;
252		outb(TIMER_CNTR2, pitch);
253		outb(TIMER_CNTR2, pitch >> 8);
254		/* enable counter 2 output to speaker */
255		outb(IO_PPI, inb(IO_PPI) | 3);
256	} else {
257		/* disable counter 2 output to speaker */
258		outb(IO_PPI, inb(IO_PPI) & 0xFC);
259		release_timer2();
260	}
261#endif /* __i386__ */
262
263	return 0;
264}
265
266static device_method_t sc_methods[] = {
267	DEVMETHOD(device_identify,	scidentify),
268	DEVMETHOD(device_probe,         scprobe),
269	DEVMETHOD(device_attach,        scattach),
270	DEVMETHOD(device_suspend,       scsuspend),
271	DEVMETHOD(device_resume,        scresume),
272	{ 0, 0 }
273};
274
275static driver_t sc_driver = {
276	SC_DRIVER_NAME,
277	sc_methods,
278	sizeof(sc_softc_t),
279};
280
281DRIVER_MODULE(sc, isa, sc_driver, sc_devclass, 0, 0);
282