syscons_isa.c revision 177642 
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
27#include <sys/cdefs.h>
28__FBSDID("$FreeBSD: head/sys/isa/syscons_isa.c 177642 2008-03-26 20:09:21Z phk $");
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/kbio.h>
39#include <sys/consio.h>
40#include <sys/sysctl.h>
41
42#if defined(__i386__) || defined(__amd64__)
43
44#include <machine/clock.h>
45#include <machine/md_var.h>
46#include <machine/ppireg.h>
47#include <machine/timerreg.h>
48#include <machine/pc/bios.h>
49
50#include <vm/vm.h>
51#include <vm/pmap.h>
52#include <vm/vm_param.h>
53
54#define BIOS_CLKED	(1 << 6)
55#define BIOS_NLKED	(1 << 5)
56#define BIOS_SLKED	(1 << 4)
57#define BIOS_ALKED	0
58
59#endif
60
61#include <dev/syscons/syscons.h>
62
63#include <isa/isavar.h>
64
65#include "opt_xbox.h"
66
67#ifdef XBOX
68#include <machine/xbox.h>
69#endif
70
71static devclass_t	sc_devclass;
72
73static sc_softc_t main_softc;
74#ifdef SC_NO_SUSPEND_VTYSWITCH
75static int sc_no_suspend_vtswitch = 1;
76#else
77static int sc_no_suspend_vtswitch = 0;
78#endif
79static int sc_cur_scr;
80
81TUNABLE_INT("hw.syscons.sc_no_suspend_vtswitch", (int *)&sc_no_suspend_vtswitch);
82SYSCTL_DECL(_hw_syscons);
83SYSCTL_INT(_hw_syscons, OID_AUTO, sc_no_suspend_vtswitch, CTLFLAG_RW,
84	&sc_no_suspend_vtswitch, 0, "Disable VT switch before suspend.");
85
86static void
87scidentify (driver_t *driver, device_t parent)
88{
89	BUS_ADD_CHILD(parent, ISA_ORDER_SPECULATIVE, "sc", 0);
90}
91
92static int
93scprobe(device_t dev)
94{
95	/* No pnp support */
96	if (isa_get_vendorid(dev))
97		return (ENXIO);
98
99	device_set_desc(dev, "System console");
100	return sc_probe_unit(device_get_unit(dev), device_get_flags(dev));
101}
102
103static int
104scattach(device_t dev)
105{
106	return sc_attach_unit(device_get_unit(dev), device_get_flags(dev));
107}
108
109static int
110scsuspend(device_t dev)
111{
112	int		retry = 10;
113	sc_softc_t	*sc;
114
115	sc = &main_softc;
116
117	if (sc->cur_scp == NULL)
118		return (0);
119
120	sc_cur_scr = sc->cur_scp->index;
121
122	if (sc_no_suspend_vtswitch)
123		return (0);
124
125	do {
126		sc_switch_scr(sc, 0);
127		if (!sc->switch_in_progress) {
128			break;
129		}
130		pause("scsuspend", hz);
131	} while (retry--);
132
133	return (0);
134}
135
136static int
137scresume(device_t dev)
138{
139	sc_softc_t	*sc;
140
141	if (sc_no_suspend_vtswitch)
142		return (0);
143
144	sc = &main_softc;
145	sc_switch_scr(sc, sc_cur_scr);
146
147	return (0);
148}
149
150int
151sc_max_unit(void)
152{
153	return devclass_get_maxunit(sc_devclass);
154}
155
156sc_softc_t
157*sc_get_softc(int unit, int flags)
158{
159	sc_softc_t *sc;
160
161	if (unit < 0)
162		return NULL;
163	if (flags & SC_KERNEL_CONSOLE) {
164		/* FIXME: clear if it is wired to another unit! */
165		sc = &main_softc;
166	} else {
167	        sc = (sc_softc_t *)device_get_softc(devclass_get_device(sc_devclass, unit));
168		if (sc == NULL)
169			return NULL;
170	}
171	sc->unit = unit;
172	if (!(sc->flags & SC_INIT_DONE)) {
173		sc->keyboard = -1;
174		sc->adapter = -1;
175		sc->cursor_char = SC_CURSOR_CHAR;
176		sc->mouse_char = SC_MOUSE_CHAR;
177	}
178	return sc;
179}
180
181sc_softc_t
182*sc_find_softc(struct video_adapter *adp, struct keyboard *kbd)
183{
184	sc_softc_t *sc;
185	int units;
186	int i;
187
188	sc = &main_softc;
189	if (((adp == NULL) || (adp == sc->adp))
190	    && ((kbd == NULL) || (kbd == sc->kbd)))
191		return sc;
192	units = devclass_get_maxunit(sc_devclass);
193	for (i = 0; i < units; ++i) {
194	        sc = (sc_softc_t *)device_get_softc(devclass_get_device(sc_devclass, i));
195		if (sc == NULL)
196			continue;
197		if (((adp == NULL) || (adp == sc->adp))
198		    && ((kbd == NULL) || (kbd == sc->kbd)))
199			return sc;
200	}
201	return NULL;
202}
203
204int
205sc_get_cons_priority(int *unit, int *flags)
206{
207	const char *at;
208	int u, f;
209
210#ifdef XBOX
211	/*
212	 * The XBox Loader does not support hints, which makes our initial
213	 * console probe fail. Therefore, if an XBox is found, we hardcode the
214	 * existence of the console, as it is always there anyway.
215	 */
216	if (arch_i386_is_xbox) {
217		*unit = 0;
218		*flags = SC_KERNEL_CONSOLE;
219		return CN_INTERNAL;
220	}
221#endif
222
223	*unit = -1;
224	for (u = 0; u < 16; u++) {
225		if (resource_disabled(SC_DRIVER_NAME, u))
226			continue;
227		if (resource_string_value(SC_DRIVER_NAME, u, "at", &at) != 0)
228			continue;
229		if (resource_int_value(SC_DRIVER_NAME, u, "flags", &f) != 0)
230			f = 0;
231		if (f & SC_KERNEL_CONSOLE) {
232			/* the user designates this unit to be the console */
233			*unit = u;
234			*flags = f;
235			break;
236		}
237		if (*unit < 0) {
238			/* ...otherwise remember the first found unit */
239			*unit = u;
240			*flags = f;
241		}
242	}
243	if (*unit < 0)
244		return CN_DEAD;
245#if 0
246	return ((*flags & SC_KERNEL_CONSOLE) ? CN_INTERNAL : CN_NORMAL);
247#endif
248	return CN_INTERNAL;
249}
250
251void
252sc_get_bios_values(bios_values_t *values)
253{
254#if defined(__i386__) || defined(__amd64__)
255	u_int8_t shift;
256
257	values->cursor_start = *(u_int8_t *)BIOS_PADDRTOVADDR(0x461);
258	values->cursor_end = *(u_int8_t *)BIOS_PADDRTOVADDR(0x460);
259	shift = *(u_int8_t *)BIOS_PADDRTOVADDR(0x417);
260	values->shift_state = ((shift & BIOS_CLKED) ? CLKED : 0)
261			       | ((shift & BIOS_NLKED) ? NLKED : 0)
262			       | ((shift & BIOS_SLKED) ? SLKED : 0)
263			       | ((shift & BIOS_ALKED) ? ALKED : 0);
264#else
265	values->cursor_start = 0;
266	values->cursor_end = 32;
267	values->shift_state = 0;
268#endif
269	values->bell_pitch = BELL_PITCH;
270}
271
272int
273sc_tone(int herz)
274{
275#if defined(__i386__) || defined(__amd64__)
276	if (herz) {
277		/* set command for counter 2, 2 byte write */
278		if (timer_spkr_acquire())
279			return EBUSY;
280		/* set pitch */
281		timer_spkr_setfreq(herz);
282		/* enable counter 2 output to speaker */
283		ppi_spkr_on();
284	} else {
285		/* disable counter 2 output to speaker */
286		ppi_spkr_off();
287		timer_spkr_release();
288	}
289#endif
290
291	return 0;
292}
293
294static device_method_t sc_methods[] = {
295	DEVMETHOD(device_identify,	scidentify),
296	DEVMETHOD(device_probe,         scprobe),
297	DEVMETHOD(device_attach,        scattach),
298	DEVMETHOD(device_suspend,       scsuspend),
299	DEVMETHOD(device_resume,        scresume),
300	{ 0, 0 }
301};
302
303static driver_t sc_driver = {
304	SC_DRIVER_NAME,
305	sc_methods,
306	sizeof(sc_softc_t),
307};
308
309DRIVER_MODULE(sc, isa, sc_driver, sc_devclass, 0, 0);
310