syscons_cbus.c revision 109303 
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 109303 2003-01-15 13:12:12Z 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
42#include <pc98/pc98/pc98.h>
43#include <pc98/pc98/pc98_machdep.h>
44
45#include <dev/syscons/syscons.h>
46
47#include <i386/isa/timerreg.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	sc_cur_scr = sc->cur_scp->index;
98
99	if (sc_no_suspend_vtswitch)
100		return (0);
101
102	do {
103		sc_switch_scr(sc, 0);
104		if (!sc->switch_in_progress) {
105			break;
106		}
107		tsleep(&dummy, 0, "scsuspend", 100);
108	} while (retry--);
109
110	return (0);
111}
112
113static int
114scresume(device_t dev)
115{
116	sc_softc_t	*sc;
117
118	if (sc_no_suspend_vtswitch)
119		return (0);
120
121	sc = &main_softc;
122	sc_switch_scr(sc, sc_cur_scr);
123
124	return (0);
125}
126
127int
128sc_max_unit(void)
129{
130	return devclass_get_maxunit(sc_devclass);
131}
132
133sc_softc_t
134*sc_get_softc(int unit, int flags)
135{
136	sc_softc_t *sc;
137
138	if (unit < 0)
139		return NULL;
140	if (flags & SC_KERNEL_CONSOLE) {
141		/* FIXME: clear if it is wired to another unit! */
142		sc = &main_softc;
143	} else {
144	        sc = (sc_softc_t *)device_get_softc(devclass_get_device(sc_devclass, unit));
145		if (sc == NULL)
146			return NULL;
147	}
148	sc->unit = unit;
149	if (!(sc->flags & SC_INIT_DONE)) {
150		sc->keyboard = -1;
151		sc->adapter = -1;
152		sc->mouse_char = SC_MOUSE_CHAR;
153	}
154	return sc;
155}
156
157sc_softc_t
158*sc_find_softc(struct video_adapter *adp, struct keyboard *kbd)
159{
160	sc_softc_t *sc;
161	int units;
162	int i;
163
164	sc = &main_softc;
165	if (((adp == NULL) || (adp == sc->adp))
166	    && ((kbd == NULL) || (kbd == sc->kbd)))
167		return sc;
168	units = devclass_get_maxunit(sc_devclass);
169	for (i = 0; i < units; ++i) {
170	        sc = (sc_softc_t *)device_get_softc(devclass_get_device(sc_devclass, i));
171		if (sc == NULL)
172			continue;
173		if (((adp == NULL) || (adp == sc->adp))
174		    && ((kbd == NULL) || (kbd == sc->kbd)))
175			return sc;
176	}
177	return NULL;
178}
179
180int
181sc_get_cons_priority(int *unit, int *flags)
182{
183	int disabled;
184	const char *at;
185	int u, f;
186
187	*unit = -1;
188	for (u = 0; u < 16; u++) {
189		if ((resource_int_value(SC_DRIVER_NAME, u, "disabled",
190					&disabled) == 0) && disabled)
191			continue;
192		if (resource_string_value(SC_DRIVER_NAME, u, "at", &at) != 0)
193			continue;
194		if (resource_int_value(SC_DRIVER_NAME, u, "flags", &f) != 0)
195			f = 0;
196		if (f & SC_KERNEL_CONSOLE) {
197			/* the user designates this unit to be the console */
198			*unit = u;
199			*flags = f;
200			break;
201		}
202		if (*unit < 0) {
203			/* ...otherwise remember the first found unit */
204			*unit = u;
205			*flags = f;
206		}
207	}
208	if (*unit < 0)
209		return CN_DEAD;
210	return CN_INTERNAL;
211}
212
213void
214sc_get_bios_values(bios_values_t *values)
215{
216	values->cursor_start = 15;
217	values->cursor_end = 16;
218	values->shift_state = 0;
219	if (pc98_machine_type & M_8M)
220		values->bell_pitch = BELL_PITCH_8M;
221	else
222		values->bell_pitch = BELL_PITCH_5M;
223}
224
225int
226sc_tone(int herz)
227{
228	int pitch;
229
230	if (herz) {
231		/* enable counter 1 */
232		outb(0x35, inb(0x35) & 0xf7);
233		/* set command for counter 1, 2 byte write */
234		if (acquire_timer1(TIMER_16BIT | TIMER_SQWAVE))
235			return EBUSY;
236		/* set pitch */
237		pitch = timer_freq/herz;
238		outb(TIMER_CNTR1, pitch);
239		outb(TIMER_CNTR1, pitch >> 8);
240	} else {
241		/* disable counter 1 */
242		outb(0x35, inb(0x35) | 0x08);
243		release_timer1();
244	}
245	return 0;
246}
247
248static device_method_t sc_methods[] = {
249	DEVMETHOD(device_identify,	scidentify),
250	DEVMETHOD(device_probe,         scprobe),
251	DEVMETHOD(device_attach,        scattach),
252	DEVMETHOD(device_suspend,       scsuspend),
253	DEVMETHOD(device_resume,        scresume),
254	{ 0, 0 }
255};
256
257static driver_t sc_driver = {
258	SC_DRIVER_NAME,
259	sc_methods,
260	sizeof(sc_softc_t),
261};
262
263DRIVER_MODULE(sc, isa, sc_driver, sc_devclass, 0, 0);
264