FreeBSD/Linux Kernel Cross Reference
sys/isa/syscons_isa.c
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: releng/8.3/sys/isa/syscons_isa.c 210303 2010-07-20 18:28:34Z jkim $");
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/pc/bios.h>
47
48 #include <vm/vm.h>
49 #include <vm/pmap.h>
50 #include <vm/vm_param.h>
51
52 #define BIOS_CLKED (1 << 6)
53 #define BIOS_NLKED (1 << 5)
54 #define BIOS_SLKED (1 << 4)
55 #define BIOS_ALKED 0
56
57 #endif
58
59 #include <dev/syscons/syscons.h>
60
61 #include <isa/isavar.h>
62
63 #include "opt_xbox.h"
64
65 #ifdef XBOX
66 #include <machine/xbox.h>
67 #endif
68
69 static devclass_t sc_devclass;
70
71 static sc_softc_t main_softc;
72 #ifdef SC_NO_SUSPEND_VTYSWITCH
73 static int sc_no_suspend_vtswitch = 1;
74 #else
75 static int sc_no_suspend_vtswitch = 0;
76 #endif
77 static int sc_cur_scr;
78
79 TUNABLE_INT("hw.syscons.sc_no_suspend_vtswitch", &sc_no_suspend_vtswitch);
80 SYSCTL_DECL(_hw_syscons);
81 SYSCTL_INT(_hw_syscons, OID_AUTO, sc_no_suspend_vtswitch, CTLFLAG_RW,
82 &sc_no_suspend_vtswitch, 0, "Disable VT switch before suspend.");
83
84 static void
85 scidentify(driver_t *driver, device_t parent)
86 {
87
88 BUS_ADD_CHILD(parent, ISA_ORDER_SPECULATIVE, "sc", 0);
89 }
90
91 static int
92 scprobe(device_t dev)
93 {
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
107 return (sc_attach_unit(device_get_unit(dev), device_get_flags(dev) |
108 SC_AUTODETECT_KBD));
109 }
110
111 static int
112 scsuspend(device_t dev)
113 {
114 int retry = 10;
115 sc_softc_t *sc;
116
117 sc = &main_softc;
118
119 if (sc->cur_scp == NULL)
120 return (0);
121
122 if (sc->suspend_in_progress == 0) {
123 sc_cur_scr = sc->cur_scp->index;
124 if (!sc_no_suspend_vtswitch && sc_cur_scr != 0)
125 do {
126 sc_switch_scr(sc, 0);
127 if (!sc->switch_in_progress)
128 break;
129 pause("scsuspend", hz);
130 } while (retry--);
131 }
132 sc->suspend_in_progress++;
133
134 return (0);
135 }
136
137 static int
138 scresume(device_t dev)
139 {
140 sc_softc_t *sc;
141
142 sc = &main_softc;
143
144 if (sc->cur_scp == NULL)
145 return (0);
146
147 sc->suspend_in_progress--;
148 if (sc->suspend_in_progress == 0) {
149 if (!sc_no_suspend_vtswitch && sc_cur_scr != 0)
150 sc_switch_scr(sc, sc_cur_scr);
151 else
152 mark_all(sc->cur_scp);
153 }
154
155 return (0);
156 }
157
158 int
159 sc_max_unit(void)
160 {
161
162 return (devclass_get_maxunit(sc_devclass));
163 }
164
165 sc_softc_t
166 *sc_get_softc(int unit, int flags)
167 {
168 sc_softc_t *sc;
169
170 if (unit < 0)
171 return (NULL);
172 if ((flags & SC_KERNEL_CONSOLE) != 0) {
173 /* FIXME: clear if it is wired to another unit! */
174 sc = &main_softc;
175 } else {
176 sc = device_get_softc(devclass_get_device(sc_devclass, unit));
177 if (sc == NULL)
178 return (NULL);
179 }
180 sc->unit = unit;
181 if ((sc->flags & SC_INIT_DONE) == 0) {
182 sc->keyboard = -1;
183 sc->adapter = -1;
184 sc->cursor_char = SC_CURSOR_CHAR;
185 sc->mouse_char = SC_MOUSE_CHAR;
186 }
187 return (sc);
188 }
189
190 sc_softc_t
191 *sc_find_softc(struct video_adapter *adp, struct keyboard *kbd)
192 {
193 sc_softc_t *sc;
194 int i;
195 int units;
196
197 sc = &main_softc;
198 if ((adp == NULL || adp == sc->adp) &&
199 (kbd == NULL || kbd == sc->kbd))
200 return (sc);
201 units = devclass_get_maxunit(sc_devclass);
202 for (i = 0; i < units; ++i) {
203 sc = device_get_softc(devclass_get_device(sc_devclass, i));
204 if (sc == NULL)
205 continue;
206 if ((adp == NULL || adp == sc->adp) &&
207 (kbd == NULL || kbd == sc->kbd))
208 return (sc);
209 }
210 return (NULL);
211 }
212
213 int
214 sc_get_cons_priority(int *unit, int *flags)
215 {
216 const char *at;
217 int f, u;
218
219 #ifdef XBOX
220 /*
221 * The XBox Loader does not support hints, which makes our initial
222 * console probe fail. Therefore, if an XBox is found, we hardcode the
223 * existence of the console, as it is always there anyway.
224 */
225 if (arch_i386_is_xbox) {
226 *unit = 0;
227 *flags = SC_KERNEL_CONSOLE;
228 return (CN_INTERNAL);
229 }
230 #endif
231
232 *unit = -1;
233 for (u = 0; u < 16; u++) {
234 if (resource_disabled(SC_DRIVER_NAME, u))
235 continue;
236 if (resource_string_value(SC_DRIVER_NAME, u, "at", &at) != 0)
237 continue;
238 if (resource_int_value(SC_DRIVER_NAME, u, "flags", &f) != 0)
239 f = 0;
240 if (f & SC_KERNEL_CONSOLE) {
241 /* the user designates this unit to be the console */
242 *unit = u;
243 *flags = f;
244 break;
245 }
246 if (*unit < 0) {
247 /* ...otherwise remember the first found unit */
248 *unit = u;
249 *flags = f;
250 }
251 }
252 if (*unit < 0) {
253 *unit = 0;
254 *flags = 0;
255 }
256 #if 0
257 return ((*flags & SC_KERNEL_CONSOLE) != 0 ? CN_INTERNAL : CN_NORMAL);
258 #endif
259 return (CN_INTERNAL);
260 }
261
262 void
263 sc_get_bios_values(bios_values_t *values)
264 {
265 #if defined(__i386__) || defined(__amd64__)
266 uint8_t shift;
267
268 values->cursor_start = *(uint8_t *)BIOS_PADDRTOVADDR(0x461);
269 values->cursor_end = *(uint8_t *)BIOS_PADDRTOVADDR(0x460);
270 shift = *(uint8_t *)BIOS_PADDRTOVADDR(0x417);
271 values->shift_state = ((shift & BIOS_CLKED) != 0 ? CLKED : 0) |
272 ((shift & BIOS_NLKED) != 0 ? NLKED : 0) |
273 ((shift & BIOS_SLKED) != 0 ? SLKED : 0) |
274 ((shift & BIOS_ALKED) != 0 ? ALKED : 0);
275 #else
276 values->cursor_start = 0;
277 values->cursor_end = 32;
278 values->shift_state = 0;
279 #endif
280 values->bell_pitch = BELL_PITCH;
281 }
282
283 int
284 sc_tone(int herz)
285 {
286
287 #if defined(HAS_TIMER_SPKR)
288 if (herz) {
289 if (timer_spkr_acquire())
290 return (EBUSY);
291 timer_spkr_setfreq(herz);
292 } else
293 timer_spkr_release();
294 #endif
295
296 return (0);
297 }
298
299 static device_method_t sc_methods[] = {
300 DEVMETHOD(device_identify, scidentify),
301 DEVMETHOD(device_probe, scprobe),
302 DEVMETHOD(device_attach, scattach),
303 DEVMETHOD(device_suspend, scsuspend),
304 DEVMETHOD(device_resume, scresume),
305 { 0, 0 }
306 };
307
308 static driver_t sc_driver = {
309 SC_DRIVER_NAME,
310 sc_methods,
311 sizeof(sc_softc_t),
312 };
313
314 DRIVER_MODULE(sc, isa, sc_driver, sc_devclass, 0, 0);
315
316 static devclass_t scpm_devclass;
317
318 static void
319 scpm_identify(driver_t *driver, device_t parent)
320 {
321
322 device_add_child(parent, "scpm", 0);
323 }
324
325 static int
326 scpm_probe(device_t dev)
327 {
328
329 device_set_desc(dev, SC_DRIVER_NAME " suspend/resume");
330 device_quiet(dev);
331
332 return (BUS_PROBE_DEFAULT);
333 }
334
335 static int
336 scpm_attach(device_t dev)
337 {
338
339 bus_generic_probe(dev);
340 bus_generic_attach(dev);
341
342 return (0);
343 }
344
345 static int
346 scpm_suspend(device_t dev)
347 {
348 int error;
349
350 error = bus_generic_suspend(dev);
351 if (error != 0)
352 return (error);
353
354 return (scsuspend(dev));
355 }
356
357 static int
358 scpm_resume(device_t dev)
359 {
360
361 scresume(dev);
362
363 return (bus_generic_resume(dev));
364 }
365
366 static device_method_t scpm_methods[] = {
367 DEVMETHOD(device_identify, scpm_identify),
368 DEVMETHOD(device_probe, scpm_probe),
369 DEVMETHOD(device_attach, scpm_attach),
370 DEVMETHOD(device_suspend, scpm_suspend),
371 DEVMETHOD(device_resume, scpm_resume),
372 { 0, 0 }
373 };
374
375 static driver_t scpm_driver = {
376 "scpm",
377 scpm_methods,
378 0
379 };
380
381 DRIVER_MODULE(scpm, vgapm, scpm_driver, scpm_devclass, 0, 0);
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