syscons_cbus.c revision 177642 
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 177642 2008-03-26 20:09:21Z phk $
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/pc98/pc98_machdep.h>
45
46#include <dev/syscons/syscons.h>
47
48#include <isa/isavar.h>
49
50static devclass_t	sc_devclass;
51
52static sc_softc_t main_softc;
53#ifdef SC_NO_SUSPEND_VTYSWITCH
54static int sc_no_suspend_vtswitch = 1;
55#else
56static int sc_no_suspend_vtswitch = 0;
57#endif
58static int sc_cur_scr;
59
60TUNABLE_INT("hw.syscons.sc_no_suspend_vtswitch", (int *)&sc_no_suspend_vtswitch);
61SYSCTL_DECL(_hw_syscons);
62SYSCTL_INT(_hw_syscons, OID_AUTO, sc_no_suspend_vtswitch, CTLFLAG_RW,
63	&sc_no_suspend_vtswitch, 0, "Disable VT switch before suspend.");
64
65static void
66scidentify (driver_t *driver, device_t parent)
67{
68	BUS_ADD_CHILD(parent, ISA_ORDER_SPECULATIVE, "sc", 0);
69}
70
71static int
72scprobe(device_t dev)
73{
74	/* No pnp support */
75	if (isa_get_vendorid(dev))
76		return (ENXIO);
77
78	device_set_desc(dev, "System console");
79	return sc_probe_unit(device_get_unit(dev), device_get_flags(dev));
80}
81
82static int
83scattach(device_t dev)
84{
85	return sc_attach_unit(device_get_unit(dev), device_get_flags(dev));
86}
87
88static int
89scsuspend(device_t dev)
90{
91	int		retry = 10;
92	sc_softc_t	*sc;
93
94	sc = &main_softc;
95
96	if (sc->cur_scp == NULL)
97		return (0);
98
99	sc_cur_scr = sc->cur_scp->index;
100
101	if (sc_no_suspend_vtswitch)
102		return (0);
103
104	do {
105		sc_switch_scr(sc, 0);
106		if (!sc->switch_in_progress) {
107			break;
108		}
109		pause("scsuspend", hz);
110	} while (retry--);
111
112	return (0);
113}
114
115static int
116scresume(device_t dev)
117{
118	sc_softc_t	*sc;
119
120	if (sc_no_suspend_vtswitch)
121		return (0);
122
123	sc = &main_softc;
124	sc_switch_scr(sc, sc_cur_scr);
125
126	return (0);
127}
128
129int
130sc_max_unit(void)
131{
132	return devclass_get_maxunit(sc_devclass);
133}
134
135sc_softc_t
136*sc_get_softc(int unit, int flags)
137{
138	sc_softc_t *sc;
139
140	if (unit < 0)
141		return NULL;
142	if (flags & SC_KERNEL_CONSOLE) {
143		/* FIXME: clear if it is wired to another unit! */
144		sc = &main_softc;
145	} else {
146	        sc = (sc_softc_t *)device_get_softc(devclass_get_device(sc_devclass, unit));
147		if (sc == NULL)
148			return NULL;
149	}
150	sc->unit = unit;
151	if (!(sc->flags & SC_INIT_DONE)) {
152		sc->keyboard = -1;
153		sc->adapter = -1;
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	const char *at;
186	int u, f;
187
188	*unit = -1;
189	for (u = 0; u < 16; u++) {
190		if (resource_disabled(SC_DRIVER_NAME, u))
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
229	if (herz) {
230		/* enable counter 1 */
231		ppi_spkr_on();
232		/* set command for counter 1, 2 byte write */
233		if (timer_spkr_acquire())
234			return EBUSY;
235		/* set pitch */
236		timer_spkr_setfreq(herz);
237	} else {
238		/* disable counter 1 */
239		ppi_spkr_off();
240		timer_spkr_release();
241	}
242	return 0;
243}
244
245static device_method_t sc_methods[] = {
246	DEVMETHOD(device_identify,	scidentify),
247	DEVMETHOD(device_probe,         scprobe),
248	DEVMETHOD(device_attach,        scattach),
249	DEVMETHOD(device_suspend,       scsuspend),
250	DEVMETHOD(device_resume,        scresume),
251	{ 0, 0 }
252};
253
254static driver_t sc_driver = {
255	SC_DRIVER_NAME,
256	sc_methods,
257	sizeof(sc_softc_t),
258};
259
260DRIVER_MODULE(sc, isa, sc_driver, sc_devclass, 0, 0);
261