syscons_cbus.c revision 208563 
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
27#include <sys/cdefs.h>
28__FBSDID("$FreeBSD: head/sys/pc98/cbus/syscons_cbus.c 208563 2010-05-26 11:31:57Z nyan $");
29
30#include "opt_syscons.h"
31
32#include <sys/param.h>
33#include <sys/systm.h>
34#include <sys/kernel.h>
35#include <sys/module.h>
36#include <sys/bus.h>
37#include <sys/cons.h>
38#include <sys/consio.h>
39#include <sys/sysctl.h>
40
41#include <machine/clock.h>
42
43#include <pc98/pc98/pc98_machdep.h>
44
45#include <dev/syscons/syscons.h>
46
47#include <isa/isavar.h>
48
49static devclass_t	sc_devclass;
50
51static sc_softc_t	main_softc;
52#ifdef SC_NO_SUSPEND_VTYSWITCH
53static int sc_no_suspend_vtswitch = 1;
54#else
55static int sc_no_suspend_vtswitch = 0;
56#endif
57static int sc_cur_scr;
58
59TUNABLE_INT("hw.syscons.sc_no_suspend_vtswitch", &sc_no_suspend_vtswitch);
60SYSCTL_DECL(_hw_syscons);
61SYSCTL_INT(_hw_syscons, OID_AUTO, sc_no_suspend_vtswitch, CTLFLAG_RW,
62    &sc_no_suspend_vtswitch, 0, "Disable VT switch before suspend.");
63
64static void
65scidentify(driver_t *driver, device_t parent)
66{
67
68	BUS_ADD_CHILD(parent, ISA_ORDER_SPECULATIVE, "sc", 0);
69}
70
71static int
72scprobe(device_t dev)
73{
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
87	return sc_attach_unit(device_get_unit(dev), device_get_flags(dev));
88}
89
90static int
91scsuspend(device_t dev)
92{
93	int		retry = 10;
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		pause("scsuspend", hz);
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
135	return (devclass_get_maxunit(sc_devclass));
136}
137
138sc_softc_t
139*sc_get_softc(int unit, int flags)
140{
141	sc_softc_t *sc;
142
143	if (unit < 0)
144		return (NULL);
145	if ((flags & SC_KERNEL_CONSOLE) != 0) {
146		/* FIXME: clear if it is wired to another unit! */
147		sc = &main_softc;
148	} else {
149	        sc = device_get_softc(devclass_get_device(sc_devclass, unit));
150		if (sc == NULL)
151			return (NULL);
152	}
153	sc->unit = unit;
154	if ((sc->flags & SC_INIT_DONE) == 0) {
155		sc->keyboard = -1;
156		sc->adapter = -1;
157		sc->mouse_char = SC_MOUSE_CHAR;
158	}
159	return (sc);
160}
161
162sc_softc_t
163*sc_find_softc(struct video_adapter *adp, struct keyboard *kbd)
164{
165	sc_softc_t *sc;
166	int i;
167	int units;
168
169	sc = &main_softc;
170	if ((adp == NULL || adp == sc->adp) &&
171	    (kbd == NULL || kbd == sc->kbd))
172		return (sc);
173	units = devclass_get_maxunit(sc_devclass);
174	for (i = 0; i < units; ++i) {
175	        sc = device_get_softc(devclass_get_device(sc_devclass, i));
176		if (sc == NULL)
177			continue;
178		if ((adp == NULL || adp == sc->adp) &&
179		    (kbd == NULL || kbd == sc->kbd))
180			return (sc);
181	}
182	return (NULL);
183}
184
185int
186sc_get_cons_priority(int *unit, int *flags)
187{
188	const char *at;
189	int f, u;
190
191	*unit = -1;
192	for (u = 0; u < 16; u++) {
193		if (resource_disabled(SC_DRIVER_NAME, u))
194			continue;
195		if (resource_string_value(SC_DRIVER_NAME, u, "at", &at) != 0)
196			continue;
197		if (resource_int_value(SC_DRIVER_NAME, u, "flags", &f) != 0)
198			f = 0;
199		if (f & SC_KERNEL_CONSOLE) {
200			/* the user designates this unit to be the console */
201			*unit = u;
202			*flags = f;
203			break;
204		}
205		if (*unit < 0) {
206			/* ...otherwise remember the first found unit */
207			*unit = u;
208			*flags = f;
209		}
210	}
211	if (*unit < 0) {
212		*unit = 0;
213		*flags = 0;
214	}
215	return (CN_INTERNAL);
216}
217
218void
219sc_get_bios_values(bios_values_t *values)
220{
221	values->cursor_start = 15;
222	values->cursor_end = 16;
223	values->shift_state = 0;
224	values->bell_pitch = BELL_PITCH;
225}
226
227int
228sc_tone(int herz)
229{
230
231	if (herz) {
232		if (timer_spkr_acquire())
233			return (EBUSY);
234		timer_spkr_setfreq(herz);
235	} else
236		timer_spkr_release();
237
238	return (0);
239}
240
241static device_method_t sc_methods[] = {
242	DEVMETHOD(device_identify,	scidentify),
243	DEVMETHOD(device_probe,         scprobe),
244	DEVMETHOD(device_attach,        scattach),
245	DEVMETHOD(device_suspend,       scsuspend),
246	DEVMETHOD(device_resume,        scresume),
247	{ 0, 0 }
248};
249
250static driver_t sc_driver = {
251	SC_DRIVER_NAME,
252	sc_methods,
253	sizeof(sc_softc_t),
254};
255
256DRIVER_MODULE(sc, isa, sc_driver, sc_devclass, 0, 0);
257