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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("$FreeBSD$");
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
71 static devclass_t       sc_devclass;
72
73 static sc_softc_t main_softc;
74 #ifdef SC_NO_SUSPEND_VTYSWITCH
75 static int sc_no_suspend_vtswitch = 1;
76 #else
77 static int sc_no_suspend_vtswitch = 0;
78 #endif
79 static int sc_cur_scr;
80
81 TUNABLE_INT("hw.syscons.sc_no_suspend_vtswitch", (int *)&sc_no_suspend_vtswitch);
82 SYSCTL_DECL(_hw_syscons);
83 SYSCTL_INT(_hw_syscons, OID_AUTO, sc_no_suspend_vtswitch, CTLFLAG_RW,
84         &sc_no_suspend_vtswitch, 0, "Disable VT switch before suspend.");
85
86 static void
87 scidentify (driver_t *driver, device_t parent)
88 {
89         BUS_ADD_CHILD(parent, ISA_ORDER_SPECULATIVE, "sc", 0);
90 }
91
92 static int
93 scprobe(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
103 static int
104 scattach(device_t dev)
105 {
106         return sc_attach_unit(device_get_unit(dev), device_get_flags(dev));
107 }
108
109 static int
110 scsuspend(device_t dev)
111 {
112         int             retry = 10;
113         static int      dummy;
114         sc_softc_t      *sc;
115
116         sc = &main_softc;
117
118         if (sc->cur_scp == NULL)
119                 return (0);
120
121         sc_cur_scr = sc->cur_scp->index;
122
123         if (sc_no_suspend_vtswitch)
124                 return (0);
125
126         do {
127                 sc_switch_scr(sc, 0);
128                 if (!sc->switch_in_progress) {
129                         break;
130                 }
131                 tsleep(&dummy, 0, "scsuspend", 100);
132         } while (retry--);
133
134         return (0);
135 }
136
137 static int
138 scresume(device_t dev)
139 {
140         sc_softc_t      *sc;
141
142         if (sc_no_suspend_vtswitch)
143                 return (0);
144
145         sc = &main_softc;
146         sc_switch_scr(sc, sc_cur_scr);
147
148         return (0);
149 }
150
151 int
152 sc_max_unit(void)
153 {
154         return devclass_get_maxunit(sc_devclass);
155 }
156
157 sc_softc_t
158 *sc_get_softc(int unit, int flags)
159 {
160         sc_softc_t *sc;
161
162         if (unit < 0)
163                 return NULL;
164         if (flags & SC_KERNEL_CONSOLE) {
165                 /* FIXME: clear if it is wired to another unit! */
166                 sc = &main_softc;
167         } else {
168                 sc = (sc_softc_t *)device_get_softc(devclass_get_device(sc_devclass, unit));
169                 if (sc == NULL)
170                         return NULL;
171         }
172         sc->unit = unit;
173         if (!(sc->flags & SC_INIT_DONE)) {
174                 sc->keyboard = -1;
175                 sc->adapter = -1;
176                 sc->cursor_char = SC_CURSOR_CHAR;
177                 sc->mouse_char = SC_MOUSE_CHAR;
178         }
179         return sc;
180 }
181
182 sc_softc_t
183 *sc_find_softc(struct video_adapter *adp, struct keyboard *kbd)
184 {
185         sc_softc_t *sc;
186         int units;
187         int i;
188
189         sc = &main_softc;
190         if (((adp == NULL) || (adp == sc->adp))
191             && ((kbd == NULL) || (kbd == sc->kbd)))
192                 return sc;
193         units = devclass_get_maxunit(sc_devclass);
194         for (i = 0; i < units; ++i) {
195                 sc = (sc_softc_t *)device_get_softc(devclass_get_device(sc_devclass, i));
196                 if (sc == NULL)
197                         continue;
198                 if (((adp == NULL) || (adp == sc->adp))
199                     && ((kbd == NULL) || (kbd == sc->kbd)))
200                         return sc;
201         }
202         return NULL;
203 }
204
205 int
206 sc_get_cons_priority(int *unit, int *flags)
207 {
208         const char *at;
209         int u, f;
210
211 #ifdef XBOX
212         /*
213          * The XBox Loader does not support hints, which makes our initial
214          * console probe fail. Therefore, if an XBox is found, we hardcode the
215          * existence of the console, as it is always there anyway.
216          */
217         if (arch_i386_is_xbox) {
218                 *unit = 0;
219                 *flags = SC_KERNEL_CONSOLE;
220                 return CN_INTERNAL;
221         }
222 #endif
223
224         *unit = -1;
225         for (u = 0; u < 16; u++) {
226                 if (resource_disabled(SC_DRIVER_NAME, u))
227                         continue;
228                 if (resource_string_value(SC_DRIVER_NAME, u, "at", &at) != 0)
229                         continue;
230                 if (resource_int_value(SC_DRIVER_NAME, u, "flags", &f) != 0)
231                         f = 0;
232                 if (f & SC_KERNEL_CONSOLE) {
233                         /* the user designates this unit to be the console */
234                         *unit = u;
235                         *flags = f;
236                         break;
237                 }
238                 if (*unit < 0) {
239                         /* ...otherwise remember the first found unit */
240                         *unit = u;
241                         *flags = f;
242                 }
243         }
244         if (*unit < 0)
245                 return CN_DEAD;
246 #if 0
247         return ((*flags & SC_KERNEL_CONSOLE) ? CN_INTERNAL : CN_NORMAL);
248 #endif
249         return CN_INTERNAL;
250 }
251
252 void
253 sc_get_bios_values(bios_values_t *values)
254 {
255 #if defined(__i386__) || defined(__amd64__)
256         u_int8_t shift;
257
258         values->cursor_start = *(u_int8_t *)BIOS_PADDRTOVADDR(0x461);
259         values->cursor_end = *(u_int8_t *)BIOS_PADDRTOVADDR(0x460);
260         shift = *(u_int8_t *)BIOS_PADDRTOVADDR(0x417);
261         values->shift_state = ((shift & BIOS_CLKED) ? CLKED : 0)
262                                | ((shift & BIOS_NLKED) ? NLKED : 0)
263                                | ((shift & BIOS_SLKED) ? SLKED : 0)
264                                | ((shift & BIOS_ALKED) ? ALKED : 0);
265 #else
266         values->cursor_start = 0;
267         values->cursor_end = 32;
268         values->shift_state = 0;
269 #endif
270         values->bell_pitch = BELL_PITCH;
271 }
272
273 int
274 sc_tone(int herz)
275 {
276 #if defined(__i386__) || defined(__amd64__)
277         if (herz) {
278                 /* set command for counter 2, 2 byte write */
279                 if (timer_spkr_acquire())
280                         return EBUSY;
281                 /* set pitch */
282                 spkr_set_pitch(timer_freq / herz);
283                 /* enable counter 2 output to speaker */
284                 ppi_spkr_on();
285         } else {
286                 /* disable counter 2 output to speaker */
287                 ppi_spkr_off();
288                 timer_spkr_release();
289         }
290 #endif
291
292         return 0;
293 }
294
295 static device_method_t sc_methods[] = {
296         DEVMETHOD(device_identify,      scidentify),
297         DEVMETHOD(device_probe,         scprobe),
298         DEVMETHOD(device_attach,        scattach),
299         DEVMETHOD(device_suspend,       scsuspend),
300         DEVMETHOD(device_resume,        scresume),
301         { 0, 0 }
302 };
303
304 static driver_t sc_driver = {
305         SC_DRIVER_NAME,
306         sc_methods,
307         sizeof(sc_softc_t),
308 };
309
310 DRIVER_MODULE(sc, isa, sc_driver, sc_devclass, 0, 0);