syscons_cbus.c revision 146211 
1/*-
2 * Copyright (c) 1999 FreeBSD(98) Porting Team.
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/pc98/cbus/syscons_cbus.c 146211 2005-05-14 09:10:02Z nyan $
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/consio.h>
38#include <sys/sysctl.h>
39
40#include <machine/clock.h>
41#include <machine/ppireg.h>
42#include <machine/timerreg.h>
43
44#include <pc98/cbus/cbus.h>
45#include <pc98/pc98/pc98_machdep.h>
46
47#include <dev/syscons/syscons.h>
48
49#include <isa/isavar.h>
50
51static devclass_t	sc_devclass;
52
53static sc_softc_t main_softc;
54#ifdef SC_NO_SUSPEND_VTYSWITCH
55static int sc_no_suspend_vtswitch = 1;
56#else
57static int sc_no_suspend_vtswitch = 0;
58#endif
59static int sc_cur_scr;
60
61TUNABLE_INT("hw.syscons.sc_no_suspend_vtswitch", (int *)&sc_no_suspend_vtswitch);
62SYSCTL_DECL(_hw_syscons);
63SYSCTL_INT(_hw_syscons, OID_AUTO, sc_no_suspend_vtswitch, CTLFLAG_RW,
64	&sc_no_suspend_vtswitch, 0, "Disable VT switch before suspend.");
65
66static void
67scidentify (driver_t *driver, device_t parent)
68{
69	BUS_ADD_CHILD(parent, ISA_ORDER_SPECULATIVE, "sc", 0);
70}
71
72static int
73scprobe(device_t dev)
74{
75	/* No pnp support */
76	if (isa_get_vendorid(dev))
77		return (ENXIO);
78
79	device_set_desc(dev, "System console");
80	return sc_probe_unit(device_get_unit(dev), device_get_flags(dev));
81}
82
83static int
84scattach(device_t dev)
85{
86	return sc_attach_unit(device_get_unit(dev), device_get_flags(dev));
87}
88
89static int
90scsuspend(device_t dev)
91{
92	int		retry = 10;
93	static int	dummy;
94	sc_softc_t	*sc;
95
96	sc = &main_softc;
97
98	if (sc->cur_scp == NULL)
99		return (0);
100
101	sc_cur_scr = sc->cur_scp->index;
102
103	if (sc_no_suspend_vtswitch)
104		return (0);
105
106	do {
107		sc_switch_scr(sc, 0);
108		if (!sc->switch_in_progress) {
109			break;
110		}
111		tsleep(&dummy, 0, "scsuspend", 100);
112	} while (retry--);
113
114	return (0);
115}
116
117static int
118scresume(device_t dev)
119{
120	sc_softc_t	*sc;
121
122	if (sc_no_suspend_vtswitch)
123		return (0);
124
125	sc = &main_softc;
126	sc_switch_scr(sc, sc_cur_scr);
127
128	return (0);
129}
130
131int
132sc_max_unit(void)
133{
134	return devclass_get_maxunit(sc_devclass);
135}
136
137sc_softc_t
138*sc_get_softc(int unit, int flags)
139{
140	sc_softc_t *sc;
141
142	if (unit < 0)
143		return NULL;
144	if (flags & SC_KERNEL_CONSOLE) {
145		/* FIXME: clear if it is wired to another unit! */
146		sc = &main_softc;
147	} else {
148	        sc = (sc_softc_t *)device_get_softc(devclass_get_device(sc_devclass, unit));
149		if (sc == NULL)
150			return NULL;
151	}
152	sc->unit = unit;
153	if (!(sc->flags & SC_INIT_DONE)) {
154		sc->keyboard = -1;
155		sc->adapter = -1;
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	const char *at;
188	int u, f;
189
190	*unit = -1;
191	for (u = 0; u < 16; u++) {
192		if (resource_disabled(SC_DRIVER_NAME, u))
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	return CN_INTERNAL;
213}
214
215void
216sc_get_bios_values(bios_values_t *values)
217{
218	values->cursor_start = 15;
219	values->cursor_end = 16;
220	values->shift_state = 0;
221	if (pc98_machine_type & M_8M)
222		values->bell_pitch = BELL_PITCH_8M;
223	else
224		values->bell_pitch = BELL_PITCH_5M;
225}
226
227int
228sc_tone(int herz)
229{
230
231	if (herz) {
232		/* enable counter 1 */
233		ppi_spkr_on();
234		/* set command for counter 1, 2 byte write */
235		if (timer_spkr_acquire())
236			return EBUSY;
237		/* set pitch */
238		spkr_set_pitch(timer_freq / herz);
239	} else {
240		/* disable counter 1 */
241		ppi_spkr_off();
242		timer_spkr_release();
243	}
244	return 0;
245}
246
247static device_method_t sc_methods[] = {
248	DEVMETHOD(device_identify,	scidentify),
249	DEVMETHOD(device_probe,         scprobe),
250	DEVMETHOD(device_attach,        scattach),
251	DEVMETHOD(device_suspend,       scsuspend),
252	DEVMETHOD(device_resume,        scresume),
253	{ 0, 0 }
254};
255
256static driver_t sc_driver = {
257	SC_DRIVER_NAME,
258	sc_methods,
259	sizeof(sc_softc_t),
260};
261
262DRIVER_MODULE(sc, isa, sc_driver, sc_devclass, 0, 0);
263