syscons_isa.c revision 105333 
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 105333 2002-10-17 16:09:13Z jhb $
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
91#ifndef SC_NO_SUSPEND_VTYSWITCH
92static int	sc_cur_scr;
93#endif
94
95static int
96scsuspend(device_t dev)
97{
98#ifndef SC_NO_SUSPEND_VTYSWITCH
99	int		retry = 10;
100	static int	dummy;
101	sc_softc_t	*sc;
102
103	sc = &main_softc;
104	sc_cur_scr = sc->cur_scp->index;
105	do {
106		sc_switch_scr(sc, 0);
107		if (!sc->switch_in_progress) {
108			break;
109		}
110		tsleep(&dummy, 0, "scsuspend", 100);
111	} while (retry--);
112
113#endif
114	return (0);
115}
116
117static int
118scresume(device_t dev)
119{
120#ifndef SC_NO_SUSPEND_VTYSWITCH
121	sc_softc_t	*sc;
122
123	sc = &main_softc;
124	sc_switch_scr(sc, sc_cur_scr);
125
126#endif
127	return (0);
128}
129
130int
131sc_max_unit(void)
132{
133	return devclass_get_maxunit(sc_devclass);
134}
135
136sc_softc_t
137*sc_get_softc(int unit, int flags)
138{
139	sc_softc_t *sc;
140
141	if (unit < 0)
142		return NULL;
143	if (flags & SC_KERNEL_CONSOLE) {
144		/* FIXME: clear if it is wired to another unit! */
145		sc = &main_softc;
146	} else {
147	        sc = (sc_softc_t *)device_get_softc(devclass_get_device(sc_devclass, unit));
148		if (sc == NULL)
149			return NULL;
150	}
151	sc->unit = unit;
152	if (!(sc->flags & SC_INIT_DONE)) {
153		sc->keyboard = -1;
154		sc->adapter = -1;
155		sc->cursor_char = SC_CURSOR_CHAR;
156		sc->mouse_char = SC_MOUSE_CHAR;
157	}
158	return sc;
159}
160
161sc_softc_t
162*sc_find_softc(struct video_adapter *adp, struct keyboard *kbd)
163{
164	sc_softc_t *sc;
165	int units;
166	int i;
167
168	sc = &main_softc;
169	if (((adp == NULL) || (adp == sc->adp))
170	    && ((kbd == NULL) || (kbd == sc->kbd)))
171		return sc;
172	units = devclass_get_maxunit(sc_devclass);
173	for (i = 0; i < units; ++i) {
174	        sc = (sc_softc_t *)device_get_softc(devclass_get_device(sc_devclass, i));
175		if (sc == NULL)
176			continue;
177		if (((adp == NULL) || (adp == sc->adp))
178		    && ((kbd == NULL) || (kbd == sc->kbd)))
179			return sc;
180	}
181	return NULL;
182}
183
184int
185sc_get_cons_priority(int *unit, int *flags)
186{
187	int disabled;
188	const char *at;
189	int u, f;
190
191	*unit = -1;
192	for (u = 0; u < 16; u++) {
193		if ((resource_int_value(SC_DRIVER_NAME, u, "disabled",
194					&disabled) == 0) && disabled)
195			continue;
196		if (resource_string_value(SC_DRIVER_NAME, u, "at", &at) != 0)
197			continue;
198		if (resource_int_value(SC_DRIVER_NAME, u, "flags", &f) != 0)
199			f = 0;
200		if (f & SC_KERNEL_CONSOLE) {
201			/* the user designates this unit to be the console */
202			*unit = u;
203			*flags = f;
204			break;
205		}
206		if (*unit < 0) {
207			/* ...otherwise remember the first found unit */
208			*unit = u;
209			*flags = f;
210		}
211	}
212	if (*unit < 0)
213		return CN_DEAD;
214#if 0
215	return ((*flags & SC_KERNEL_CONSOLE) ? CN_INTERNAL : CN_NORMAL);
216#endif
217	return CN_INTERNAL;
218}
219
220void
221sc_get_bios_values(bios_values_t *values)
222{
223#ifdef __i386__
224	u_int8_t shift;
225
226	values->cursor_start = *(u_int8_t *)BIOS_PADDRTOVADDR(0x461);
227	values->cursor_end = *(u_int8_t *)BIOS_PADDRTOVADDR(0x460);
228	shift = *(u_int8_t *)BIOS_PADDRTOVADDR(0x417);
229	values->shift_state = ((shift & BIOS_CLKED) ? CLKED : 0)
230			       | ((shift & BIOS_NLKED) ? NLKED : 0)
231			       | ((shift & BIOS_SLKED) ? SLKED : 0)
232			       | ((shift & BIOS_ALKED) ? ALKED : 0);
233	values->bell_pitch = BELL_PITCH;
234#else /* !__i386__ */
235	values->cursor_start = 0;
236	values->cursor_end = 32;
237	values->shift_state = 0;
238	values->bell_pitch = BELL_PITCH;
239#endif /* __i386__ */
240}
241
242int
243sc_tone(int herz)
244{
245#ifdef __i386__
246	int pitch;
247
248	if (herz) {
249		/* set command for counter 2, 2 byte write */
250		if (acquire_timer2(TIMER_16BIT | TIMER_SQWAVE))
251			return EBUSY;
252		/* set pitch */
253		pitch = timer_freq/herz;
254		outb(TIMER_CNTR2, pitch);
255		outb(TIMER_CNTR2, pitch >> 8);
256		/* enable counter 2 output to speaker */
257		outb(IO_PPI, inb(IO_PPI) | 3);
258	} else {
259		/* disable counter 2 output to speaker */
260		outb(IO_PPI, inb(IO_PPI) & 0xFC);
261		release_timer2();
262	}
263#endif /* __i386__ */
264
265	return 0;
266}
267
268static device_method_t sc_methods[] = {
269	DEVMETHOD(device_identify,	scidentify),
270	DEVMETHOD(device_probe,         scprobe),
271	DEVMETHOD(device_attach,        scattach),
272	DEVMETHOD(device_suspend,       scsuspend),
273	DEVMETHOD(device_resume,        scresume),
274	{ 0, 0 }
275};
276
277static driver_t sc_driver = {
278	SC_DRIVER_NAME,
279	sc_methods,
280	sizeof(sc_softc_t),
281};
282
283DRIVER_MODULE(sc, isa, sc_driver, sc_devclass, 0, 0);
284