1 /*-
2 * APM (Advanced Power Management) BIOS Device Driver
3 *
4 * Copyright (c) 1994 UKAI, Fumitoshi.
5 * Copyright (c) 1994-1995 by HOSOKAWA, Tatsumi <hosokawa@jp.FreeBSD.org>
6 * Copyright (c) 1996 Nate Williams <nate@FreeBSD.org>
7 * Copyright (c) 1997 Poul-Henning Kamp <phk@FreeBSD.org>
8 *
9 * This software may be used, modified, copied, and distributed, in
10 * both source and binary form provided that the above copyright and
11 * these terms are retained. Under no circumstances is the author
12 * responsible for the proper functioning of this software, nor does
13 * the author assume any responsibility for damages incurred with its
14 * use.
15 *
16 * Sep, 1994 Implemented on FreeBSD 1.1.5.1R (Toshiba AVS001WD)
17 */
18
19 #include <sys/cdefs.h>
20 __FBSDID("$FreeBSD$");
21
22 #include <sys/param.h>
23 #include <sys/systm.h>
24 #include <sys/bus.h>
25 #include <sys/conf.h>
26 #include <sys/condvar.h>
27 #include <sys/eventhandler.h>
28 #include <sys/fcntl.h>
29 #include <sys/kernel.h>
30 #include <sys/kthread.h>
31 #include <sys/lock.h>
32 #include <sys/module.h>
33 #include <sys/mutex.h>
34 #include <sys/poll.h>
35 #include <sys/power.h>
36 #include <sys/reboot.h>
37 #include <sys/selinfo.h>
38 #include <sys/signalvar.h>
39 #include <sys/sysctl.h>
40 #include <sys/syslog.h>
41 #include <sys/time.h>
42 #include <sys/uio.h>
43
44 #include <machine/apm_bios.h>
45 #include <machine/clock.h>
46 #include <machine/endian.h>
47 #include <machine/pc/bios.h>
48 #include <machine/cpufunc.h>
49 #include <machine/segments.h>
50 #include <machine/stdarg.h>
51 #include <machine/vm86.h>
52
53 #include <machine/bus.h>
54 #include <machine/resource.h>
55 #include <sys/rman.h>
56
57 #include <vm/vm.h>
58 #include <vm/pmap.h>
59 #include <vm/vm_param.h>
60
61 #include <i386/bios/apm.h>
62 #include <isa/rtc.h>
63
64 /* Used by the apm_saver screen saver module */
65 int apm_display(int newstate);
66 struct apm_softc apm_softc;
67
68 static void apm_resume(void);
69 static int apm_bioscall(void);
70 static int apm_check_function_supported(u_int version, u_int func);
71
72 static int apm_pm_func(u_long, void*, ...);
73
74 static u_long apm_version;
75
76 int apm_evindex;
77
78 #define SCFLAG_ONORMAL 0x0000001
79 #define SCFLAG_OCTL 0x0000002
80 #define SCFLAG_OPEN (SCFLAG_ONORMAL|SCFLAG_OCTL)
81
82 #define APMDEV_NORMAL 0
83 #define APMDEV_CTL 1
84
85 #ifdef PC98
86 extern int bios32_apm98(struct bios_regs *, u_int, u_short);
87
88 /* PC98's SMM definition */
89 #define APM_NECSMM_PORT 0x6b8e
90 #define APM_NECSMM_PORTSZ 1
91 #define APM_NECSMM_EN 0x10
92 static __inline void apm_enable_smm(struct apm_softc *);
93 static __inline void apm_disable_smm(struct apm_softc *);
94 int apm_necsmm_addr;
95 u_int32_t apm_necsmm_mask;
96 #endif
97
98 static struct apmhook *hook[NAPM_HOOK]; /* XXX */
99
100 #define is_enabled(foo) ((foo) ? "enabled" : "disabled")
101
102 /* Map version number to integer (keeps ordering of version numbers) */
103 #define INTVERSION(major, minor) ((major)*100 + (minor))
104
105 static d_open_t apmopen;
106 static d_close_t apmclose;
107 static d_write_t apmwrite;
108 static d_ioctl_t apmioctl;
109 static d_poll_t apmpoll;
110
111 static struct cdevsw apm_cdevsw = {
112 .d_version = D_VERSION,
113 .d_flags = D_NEEDGIANT,
114 .d_open = apmopen,
115 .d_close = apmclose,
116 .d_write = apmwrite,
117 .d_ioctl = apmioctl,
118 .d_poll = apmpoll,
119 .d_name = "apm",
120 };
121
122 static int apm_suspend_delay = 1;
123 static int apm_standby_delay = 1;
124 static int apm_swab_batt_minutes = 0;
125 static int apm_debug = 0;
126
127 #define APM_DPRINT(args...) do { \
128 if (apm_debug) { \
129 printf(args); \
130 } \
131 } while (0)
132
133 SYSCTL_INT(_machdep, OID_AUTO, apm_suspend_delay, CTLFLAG_RW, &apm_suspend_delay, 1, "");
134 SYSCTL_INT(_machdep, OID_AUTO, apm_standby_delay, CTLFLAG_RW, &apm_standby_delay, 1, "");
135 SYSCTL_INT(_debug, OID_AUTO, apm_debug, CTLFLAG_RW, &apm_debug, 0, "");
136
137 SYSCTL_INT(_machdep, OID_AUTO, apm_swab_batt_minutes, CTLFLAG_RWTUN,
138 &apm_swab_batt_minutes, 0, "Byte swap battery time value.");
139
140 #ifdef PC98
141 static __inline void
apm_enable_smm(sc)142 apm_enable_smm(sc)
143 struct apm_softc *sc;
144 {
145 bus_space_tag_t iot = sc->sc_iot;
146 bus_space_handle_t ioh = sc->sc_ioh;
147 if (apm_necsmm_addr != 0)
148 bus_space_write_1(iot, ioh, 0,
149 (bus_space_read_1(iot, ioh, 0) | ~apm_necsmm_mask));
150 }
151
152 static __inline void
apm_disable_smm(sc)153 apm_disable_smm(sc)
154 struct apm_softc *sc;
155 {
156 bus_space_tag_t iot = sc->sc_iot;
157 bus_space_handle_t ioh = sc->sc_ioh;
158 if (apm_necsmm_addr != 0)
159 bus_space_write_1(iot, ioh, 0,
160 (bus_space_read_1(iot, ioh, 0) & apm_necsmm_mask));
161 }
162 #endif
163
164 /*
165 * return 0 if the function successfull,
166 * return 1 if the function unsuccessfull,
167 * return -1 if the function unsupported.
168 */
169 static int
apm_bioscall(void)170 apm_bioscall(void)
171 {
172 struct apm_softc *sc = &apm_softc;
173 int errno = 0;
174 u_int apm_func = sc->bios.r.eax & 0xff;
175
176 if (!apm_check_function_supported(sc->intversion, apm_func)) {
177 APM_DPRINT("apm_bioscall: function 0x%x is not supported in v%d.%d\n",
178 apm_func, sc->majorversion, sc->minorversion);
179 return (-1);
180 }
181
182 sc->bios_busy = 1;
183 #ifdef PC98
184 set_bios_selectors(&sc->bios.seg, BIOSCODE_FLAG | BIOSDATA_FLAG);
185 if (bios32_apm98(&sc->bios.r, sc->bios.entry,
186 GSEL(GBIOSCODE32_SEL, SEL_KPL)) != 0)
187 return 1;
188 #else
189 if (sc->connectmode == APM_PROT32CONNECT) {
190 set_bios_selectors(&sc->bios.seg,
191 BIOSCODE_FLAG | BIOSDATA_FLAG);
192 errno = bios32(&sc->bios.r,
193 sc->bios.entry, GSEL(GBIOSCODE32_SEL, SEL_KPL));
194 } else {
195 errno = bios16(&sc->bios, NULL);
196 }
197 #endif
198 sc->bios_busy = 0;
199 return (errno);
200 }
201
202 /* check whether APM function is supported (1) or not (0). */
203 static int
apm_check_function_supported(u_int version,u_int func)204 apm_check_function_supported(u_int version, u_int func)
205 {
206 /* except driver version */
207 if (func == APM_DRVVERSION) {
208 return (1);
209 }
210 #ifdef PC98
211 if (func == APM_GETPWSTATUS) {
212 return (1);
213 }
214 #endif
215
216 switch (version) {
217 case INTVERSION(1, 0):
218 if (func > APM_GETPMEVENT) {
219 return (0); /* not supported */
220 }
221 break;
222 case INTVERSION(1, 1):
223 if (func > APM_ENGAGEDISENGAGEPM &&
224 func < APM_OEMFUNC) {
225 return (0); /* not supported */
226 }
227 break;
228 case INTVERSION(1, 2):
229 break;
230 }
231
232 return (1); /* supported */
233 }
234
235 /* enable/disable power management */
236 static int
apm_enable_disable_pm(int enable)237 apm_enable_disable_pm(int enable)
238 {
239 struct apm_softc *sc = &apm_softc;
240
241 sc->bios.r.eax = (APM_BIOS << 8) | APM_ENABLEDISABLEPM;
242
243 if (sc->intversion >= INTVERSION(1, 1))
244 sc->bios.r.ebx = PMDV_ALLDEV;
245 else
246 sc->bios.r.ebx = 0xffff; /* APM version 1.0 only */
247 sc->bios.r.ecx = enable;
248 sc->bios.r.edx = 0;
249 return (apm_bioscall());
250 }
251
252 /* register driver version (APM 1.1 or later) */
253 static int
apm_driver_version(int version)254 apm_driver_version(int version)
255 {
256 struct apm_softc *sc = &apm_softc;
257
258 sc->bios.r.eax = (APM_BIOS << 8) | APM_DRVVERSION;
259 sc->bios.r.ebx = 0x0;
260 sc->bios.r.ecx = version;
261 sc->bios.r.edx = 0;
262
263 if (apm_bioscall() == 0 && sc->bios.r.eax == version)
264 return (0);
265
266 /* Some old BIOSes don't return the connection version in %ax. */
267 if (sc->bios.r.eax == ((APM_BIOS << 8) | APM_DRVVERSION))
268 return (0);
269
270 return (1);
271 }
272
273 /* engage/disengage power management (APM 1.1 or later) */
274 static int
apm_engage_disengage_pm(int engage)275 apm_engage_disengage_pm(int engage)
276 {
277 struct apm_softc *sc = &apm_softc;
278
279 sc->bios.r.eax = (APM_BIOS << 8) | APM_ENGAGEDISENGAGEPM;
280 sc->bios.r.ebx = PMDV_ALLDEV;
281 sc->bios.r.ecx = engage;
282 sc->bios.r.edx = 0;
283 return (apm_bioscall());
284 }
285
286 /* get PM event */
287 static u_int
apm_getevent(void)288 apm_getevent(void)
289 {
290 struct apm_softc *sc = &apm_softc;
291
292 sc->bios.r.eax = (APM_BIOS << 8) | APM_GETPMEVENT;
293
294 sc->bios.r.ebx = 0;
295 sc->bios.r.ecx = 0;
296 sc->bios.r.edx = 0;
297 if (apm_bioscall())
298 return (PMEV_NOEVENT);
299 return (sc->bios.r.ebx & 0xffff);
300 }
301
302 /* suspend entire system */
303 static int
apm_suspend_system(int state)304 apm_suspend_system(int state)
305 {
306 struct apm_softc *sc = &apm_softc;
307
308 sc->bios.r.eax = (APM_BIOS << 8) | APM_SETPWSTATE;
309 sc->bios.r.ebx = PMDV_ALLDEV;
310 sc->bios.r.ecx = state;
311 sc->bios.r.edx = 0;
312
313 #ifdef PC98
314 apm_disable_smm(sc);
315 #endif
316 if (apm_bioscall()) {
317 printf("Entire system suspend failure: errcode = %d\n",
318 0xff & (sc->bios.r.eax >> 8));
319 return 1;
320 }
321 #ifdef PC98
322 apm_enable_smm(sc);
323 #endif
324 return 0;
325 }
326
327 /* Display control */
328 /*
329 * Experimental implementation: My laptop machine can't handle this function
330 * If your laptop can control the display via APM, please inform me.
331 * HOSOKAWA, Tatsumi <hosokawa@jp.FreeBSD.org>
332 */
333 int
apm_display(int newstate)334 apm_display(int newstate)
335 {
336 struct apm_softc *sc = &apm_softc;
337
338 sc->bios.r.eax = (APM_BIOS << 8) | APM_SETPWSTATE;
339 sc->bios.r.ebx = PMDV_DISP0;
340 sc->bios.r.ecx = newstate ? PMST_APMENABLED:PMST_SUSPEND;
341 sc->bios.r.edx = 0;
342 if (apm_bioscall() == 0) {
343 return 0;
344 }
345
346 /* If failed, then try to blank all display devices instead. */
347 sc->bios.r.eax = (APM_BIOS << 8) | APM_SETPWSTATE;
348 sc->bios.r.ebx = PMDV_DISPALL; /* all display devices */
349 sc->bios.r.ecx = newstate ? PMST_APMENABLED:PMST_SUSPEND;
350 sc->bios.r.edx = 0;
351 if (apm_bioscall() == 0) {
352 return 0;
353 }
354 printf("Display off failure: errcode = %d\n",
355 0xff & (sc->bios.r.eax >> 8));
356 return 1;
357 }
358
359 /*
360 * Turn off the entire system.
361 */
362 static void
apm_power_off(void * junk,int howto)363 apm_power_off(void *junk, int howto)
364 {
365 struct apm_softc *sc = &apm_softc;
366
367 /* Not halting powering off, or not active */
368 if (!(howto & RB_POWEROFF) || !apm_softc.active)
369 return;
370 sc->bios.r.eax = (APM_BIOS << 8) | APM_SETPWSTATE;
371 sc->bios.r.ebx = PMDV_ALLDEV;
372 sc->bios.r.ecx = PMST_OFF;
373 sc->bios.r.edx = 0;
374 (void) apm_bioscall();
375 }
376
377 /* APM Battery low handler */
378 static void
apm_battery_low(void)379 apm_battery_low(void)
380 {
381 printf("\007\007 * * * BATTERY IS LOW * * * \007\007");
382 }
383
384 /* APM hook manager */
385 static struct apmhook *
apm_add_hook(struct apmhook ** list,struct apmhook * ah)386 apm_add_hook(struct apmhook **list, struct apmhook *ah)
387 {
388 int s;
389 struct apmhook *p, *prev;
390
391 APM_DPRINT("Add hook \"%s\"\n", ah->ah_name);
392
393 s = splhigh();
394 if (ah == NULL)
395 panic("illegal apm_hook!");
396 prev = NULL;
397 for (p = *list; p != NULL; prev = p, p = p->ah_next)
398 if (p->ah_order > ah->ah_order)
399 break;
400
401 if (prev == NULL) {
402 ah->ah_next = *list;
403 *list = ah;
404 } else {
405 ah->ah_next = prev->ah_next;
406 prev->ah_next = ah;
407 }
408 splx(s);
409 return ah;
410 }
411
412 static void
apm_del_hook(struct apmhook ** list,struct apmhook * ah)413 apm_del_hook(struct apmhook **list, struct apmhook *ah)
414 {
415 int s;
416 struct apmhook *p, *prev;
417
418 s = splhigh();
419 prev = NULL;
420 for (p = *list; p != NULL; prev = p, p = p->ah_next)
421 if (p == ah)
422 goto deleteit;
423 panic("Tried to delete unregistered apm_hook.");
424 goto nosuchnode;
425 deleteit:
426 if (prev != NULL)
427 prev->ah_next = p->ah_next;
428 else
429 *list = p->ah_next;
430 nosuchnode:
431 splx(s);
432 }
433
434
435 /* APM driver calls some functions automatically */
436 static void
apm_execute_hook(struct apmhook * list)437 apm_execute_hook(struct apmhook *list)
438 {
439 struct apmhook *p;
440
441 for (p = list; p != NULL; p = p->ah_next) {
442 APM_DPRINT("Execute APM hook \"%s.\"\n", p->ah_name);
443 if ((*(p->ah_fun))(p->ah_arg))
444 printf("Warning: APM hook \"%s\" failed", p->ah_name);
445 }
446 }
447
448
449 /* establish an apm hook */
450 struct apmhook *
apm_hook_establish(int apmh,struct apmhook * ah)451 apm_hook_establish(int apmh, struct apmhook *ah)
452 {
453 if (apmh < 0 || apmh >= NAPM_HOOK)
454 return NULL;
455
456 return apm_add_hook(&hook[apmh], ah);
457 }
458
459 /* disestablish an apm hook */
460 void
apm_hook_disestablish(int apmh,struct apmhook * ah)461 apm_hook_disestablish(int apmh, struct apmhook *ah)
462 {
463 if (apmh < 0 || apmh >= NAPM_HOOK)
464 return;
465
466 apm_del_hook(&hook[apmh], ah);
467 }
468
469 static int apm_record_event(struct apm_softc *, u_int);
470 static void apm_processevent(void);
471
472 static u_int apm_op_inprog = 0;
473
474 static void
apm_do_suspend(void)475 apm_do_suspend(void)
476 {
477 struct apm_softc *sc = &apm_softc;
478 int error;
479
480 if (sc == NULL || sc->initialized == 0)
481 return;
482
483 apm_op_inprog = 0;
484 sc->suspends = sc->suspend_countdown = 0;
485
486 EVENTHANDLER_INVOKE(power_suspend);
487
488 /*
489 * Be sure to hold Giant across DEVICE_SUSPEND/RESUME since
490 * non-MPSAFE drivers need this.
491 */
492 mtx_lock(&Giant);
493 error = DEVICE_SUSPEND(root_bus);
494 if (error)
495 goto backout;
496
497 apm_execute_hook(hook[APM_HOOK_SUSPEND]);
498 if (apm_suspend_system(PMST_SUSPEND) == 0) {
499 sc->suspending = 1;
500 apm_processevent();
501 mtx_unlock(&Giant);
502 return;
503 }
504
505 /* Failure, 'resume' the system again */
506 apm_execute_hook(hook[APM_HOOK_RESUME]);
507 DEVICE_RESUME(root_bus);
508 backout:
509 mtx_unlock(&Giant);
510 EVENTHANDLER_INVOKE(power_resume);
511 }
512
513 static void
apm_do_standby(void)514 apm_do_standby(void)
515 {
516 struct apm_softc *sc = &apm_softc;
517
518 if (sc == NULL || sc->initialized == 0)
519 return;
520
521 apm_op_inprog = 0;
522 sc->standbys = sc->standby_countdown = 0;
523
524 /*
525 * As far as standby, we don't need to execute
526 * all of suspend hooks.
527 */
528 if (apm_suspend_system(PMST_STANDBY) == 0)
529 apm_processevent();
530 return;
531 }
532
533 static void
apm_lastreq_notify(void)534 apm_lastreq_notify(void)
535 {
536 struct apm_softc *sc = &apm_softc;
537
538 sc->bios.r.eax = (APM_BIOS << 8) | APM_SETPWSTATE;
539 sc->bios.r.ebx = PMDV_ALLDEV;
540 sc->bios.r.ecx = PMST_LASTREQNOTIFY;
541 sc->bios.r.edx = 0;
542 apm_bioscall();
543 }
544
545 static int
apm_lastreq_rejected(void)546 apm_lastreq_rejected(void)
547 {
548 struct apm_softc *sc = &apm_softc;
549
550 if (apm_op_inprog == 0) {
551 return 1; /* no operation in progress */
552 }
553
554 sc->bios.r.eax = (APM_BIOS << 8) | APM_SETPWSTATE;
555 sc->bios.r.ebx = PMDV_ALLDEV;
556 sc->bios.r.ecx = PMST_LASTREQREJECT;
557 sc->bios.r.edx = 0;
558
559 if (apm_bioscall()) {
560 APM_DPRINT("apm_lastreq_rejected: failed\n");
561 return 1;
562 }
563 apm_op_inprog = 0;
564 return 0;
565 }
566
567 /*
568 * Public interface to the suspend/resume:
569 *
570 * Execute suspend and resume hook before and after sleep, respectively.
571 *
572 */
573
574 void
apm_suspend(int state)575 apm_suspend(int state)
576 {
577 struct apm_softc *sc = &apm_softc;
578
579 if (sc == NULL || sc->initialized == 0)
580 return;
581
582 switch (state) {
583 case PMST_SUSPEND:
584 if (sc->suspends)
585 return;
586 sc->suspends++;
587 sc->suspend_countdown = apm_suspend_delay;
588 break;
589 case PMST_STANDBY:
590 if (sc->standbys)
591 return;
592 sc->standbys++;
593 sc->standby_countdown = apm_standby_delay;
594 break;
595 default:
596 printf("apm_suspend: Unknown Suspend state 0x%x\n", state);
597 return;
598 }
599
600 apm_op_inprog++;
601 apm_lastreq_notify();
602 }
603
604 static void
apm_resume(void)605 apm_resume(void)
606 {
607 struct apm_softc *sc = &apm_softc;
608
609 if (sc == NULL || sc->initialized == 0 || sc->suspending == 0)
610 return;
611
612 sc->suspending = 0;
613 apm_execute_hook(hook[APM_HOOK_RESUME]);
614 mtx_lock(&Giant);
615 DEVICE_RESUME(root_bus);
616 mtx_unlock(&Giant);
617 EVENTHANDLER_INVOKE(power_resume);
618 }
619
620
621 /* get power status per battery */
622 static int
apm_get_pwstatus(apm_pwstatus_t app)623 apm_get_pwstatus(apm_pwstatus_t app)
624 {
625 struct apm_softc *sc = &apm_softc;
626
627 if (app->ap_device != PMDV_ALLDEV &&
628 (app->ap_device < PMDV_BATT0 || app->ap_device > PMDV_BATT_ALL))
629 return 1;
630
631 sc->bios.r.eax = (APM_BIOS << 8) | APM_GETPWSTATUS;
632 sc->bios.r.ebx = app->ap_device;
633 sc->bios.r.ecx = 0;
634 sc->bios.r.edx = 0xffff; /* default to unknown battery time */
635
636 if (apm_bioscall())
637 return 1;
638
639 app->ap_acline = (sc->bios.r.ebx >> 8) & 0xff;
640 app->ap_batt_stat = sc->bios.r.ebx & 0xff;
641 app->ap_batt_flag = (sc->bios.r.ecx >> 8) & 0xff;
642 app->ap_batt_life = sc->bios.r.ecx & 0xff;
643 sc->bios.r.edx &= 0xffff;
644 if (apm_swab_batt_minutes)
645 sc->bios.r.edx = __bswap16(sc->bios.r.edx) | 0x8000;
646 if (sc->bios.r.edx == 0xffff) /* Time is unknown */
647 app->ap_batt_time = -1;
648 else if (sc->bios.r.edx & 0x8000) /* Time is in minutes */
649 app->ap_batt_time = (sc->bios.r.edx & 0x7fff) * 60;
650 else /* Time is in seconds */
651 app->ap_batt_time = sc->bios.r.edx;
652
653 return 0;
654 }
655
656
657 /* get APM information */
658 static int
apm_get_info(apm_info_t aip)659 apm_get_info(apm_info_t aip)
660 {
661 struct apm_softc *sc = &apm_softc;
662 struct apm_pwstatus aps;
663
664 bzero(&aps, sizeof(aps));
665 aps.ap_device = PMDV_ALLDEV;
666 if (apm_get_pwstatus(&aps))
667 return 1;
668
669 aip->ai_infoversion = 1;
670 aip->ai_acline = aps.ap_acline;
671 aip->ai_batt_stat = aps.ap_batt_stat;
672 aip->ai_batt_life = aps.ap_batt_life;
673 aip->ai_batt_time = aps.ap_batt_time;
674 aip->ai_major = (u_int)sc->majorversion;
675 aip->ai_minor = (u_int)sc->minorversion;
676 aip->ai_status = (u_int)sc->active;
677
678 sc->bios.r.eax = (APM_BIOS << 8) | APM_GETCAPABILITIES;
679 sc->bios.r.ebx = 0;
680 sc->bios.r.ecx = 0;
681 sc->bios.r.edx = 0;
682 if (apm_bioscall()) {
683 aip->ai_batteries = 0xffffffff; /* Unknown */
684 aip->ai_capabilities = 0xff00; /* Unknown, with no bits set */
685 } else {
686 aip->ai_batteries = sc->bios.r.ebx & 0xff;
687 aip->ai_capabilities = sc->bios.r.ecx & 0xff;
688 }
689
690 bzero(aip->ai_spare, sizeof aip->ai_spare);
691
692 return 0;
693 }
694
695
696 /* inform APM BIOS that CPU is idle */
697 void
apm_cpu_idle(void)698 apm_cpu_idle(void)
699 {
700 struct apm_softc *sc = &apm_softc;
701
702 if (sc->active) {
703
704 sc->bios.r.eax = (APM_BIOS <<8) | APM_CPUIDLE;
705 sc->bios.r.edx = sc->bios.r.ecx = sc->bios.r.ebx = 0;
706 (void) apm_bioscall();
707 }
708 /*
709 * Some APM implementation halts CPU in BIOS, whenever
710 * "CPU-idle" function are invoked, but swtch() of
711 * FreeBSD halts CPU, therefore, CPU is halted twice
712 * in the sched loop. It makes the interrupt latency
713 * terribly long and be able to cause a serious problem
714 * in interrupt processing. We prevent it by removing
715 * "hlt" operation from swtch() and managed it under
716 * APM driver.
717 */
718 if (!sc->active || sc->always_halt_cpu)
719 halt(); /* wait for interrupt */
720 }
721
722 /* inform APM BIOS that CPU is busy */
723 void
apm_cpu_busy(void)724 apm_cpu_busy(void)
725 {
726 struct apm_softc *sc = &apm_softc;
727
728 /*
729 * The APM specification says this is only necessary if your BIOS
730 * slows down the processor in the idle task, otherwise it's not
731 * necessary.
732 */
733 if (sc->slow_idle_cpu && sc->active) {
734
735 sc->bios.r.eax = (APM_BIOS <<8) | APM_CPUBUSY;
736 sc->bios.r.edx = sc->bios.r.ecx = sc->bios.r.ebx = 0;
737 apm_bioscall();
738 }
739 }
740
741
742 /*
743 * APM thread loop.
744 *
745 * This routine wakes up from time to time to deal with delaying the
746 * suspend of the system, or other events.
747 */
748 static void
apm_event_thread(void * arg)749 apm_event_thread(void *arg)
750 {
751 struct apm_softc *sc = &apm_softc;
752
753 sc->running = 1;
754 while (sc->active) {
755 if (apm_op_inprog)
756 apm_lastreq_notify();
757 if (sc->standbys && sc->standby_countdown-- <= 0)
758 apm_do_standby();
759 if (sc->suspends && sc->suspend_countdown-- <= 0)
760 apm_do_suspend();
761 if (!sc->bios_busy)
762 apm_processevent();
763 mtx_lock(&sc->mtx);
764 cv_timedwait(&sc->cv, &sc->mtx, 10 * hz / 9);
765 mtx_unlock(&sc->mtx);
766 }
767 sc->running = 0;
768 kproc_exit(0);
769 }
770
771 /* enable APM BIOS */
772 static void
apm_event_enable(void)773 apm_event_enable(void)
774 {
775 struct apm_softc *sc = &apm_softc;
776
777 APM_DPRINT("called apm_event_enable()\n");
778
779 if (sc == NULL || sc->initialized == 0)
780 return;
781
782 /* Start the thread */
783 sc->active = 1;
784 if (kproc_create(apm_event_thread, sc, &sc->event_thread, 0, 0,
785 "apm worker"))
786 panic("Cannot create apm worker thread");
787
788 return;
789 }
790
791 /* disable APM BIOS */
792 static void
apm_event_disable(void)793 apm_event_disable(void)
794 {
795 struct apm_softc *sc = &apm_softc;
796
797 APM_DPRINT("called apm_event_disable()\n");
798
799 if (sc == NULL || sc->initialized == 0)
800 return;
801
802 mtx_lock(&sc->mtx);
803 sc->active = 0;
804 while (sc->running) {
805 cv_broadcast(&sc->cv);
806 msleep(sc->event_thread, &sc->mtx, PWAIT, "apmdie", 0);
807 }
808 mtx_unlock(&sc->mtx);
809 sc->event_thread = NULL;
810 return;
811 }
812
813 /* halt CPU in scheduling loop */
814 static void
apm_halt_cpu(void)815 apm_halt_cpu(void)
816 {
817 struct apm_softc *sc = &apm_softc;
818
819 if (sc == NULL || sc->initialized == 0)
820 return;
821
822 sc->always_halt_cpu = 1;
823
824 return;
825 }
826
827 /* don't halt CPU in scheduling loop */
828 static void
apm_not_halt_cpu(void)829 apm_not_halt_cpu(void)
830 {
831 struct apm_softc *sc = &apm_softc;
832
833 if (sc == NULL || sc->initialized == 0)
834 return;
835
836 sc->always_halt_cpu = 0;
837
838 return;
839 }
840
841 /* device driver definitions */
842
843 /*
844 * Module event
845 */
846
847 static int
apm_modevent(struct module * mod,int event,void * junk)848 apm_modevent(struct module *mod, int event, void *junk)
849 {
850
851 switch (event) {
852 case MOD_LOAD:
853 if (!cold)
854 return (EPERM);
855 break;
856 case MOD_UNLOAD:
857 if (!cold && power_pm_get_type() == POWER_PM_TYPE_APM)
858 return (EBUSY);
859 break;
860 default:
861 break;
862 }
863
864 return (0);
865 }
866
867 /*
868 * Create "connection point"
869 */
870 static void
apm_identify(driver_t * driver,device_t parent)871 apm_identify(driver_t *driver, device_t parent)
872 {
873 device_t child;
874
875 if (!cold) {
876 printf("Don't load this driver from userland!!\n");
877 return;
878 }
879
880 if (resource_disabled("apm", 0))
881 return;
882
883 child = BUS_ADD_CHILD(parent, 0, "apm", 0);
884 if (child == NULL)
885 panic("apm_identify");
886 }
887
888 /*
889 * probe for APM BIOS
890 */
891 static int
apm_probe(device_t dev)892 apm_probe(device_t dev)
893 {
894 #define APM_KERNBASE KERNBASE
895 struct vm86frame vmf;
896 struct apm_softc *sc = &apm_softc;
897 #ifdef PC98
898 int rid;
899 #endif
900
901 device_set_desc(dev, "APM BIOS");
902 if (device_get_unit(dev) > 0) {
903 printf("apm: Only one APM driver supported.\n");
904 return ENXIO;
905 }
906
907 if (power_pm_get_type() != POWER_PM_TYPE_NONE &&
908 power_pm_get_type() != POWER_PM_TYPE_APM) {
909 printf("apm: Other PM system enabled.\n");
910 return ENXIO;
911 }
912
913 bzero(&vmf, sizeof(struct vm86frame)); /* safety */
914 bzero(&apm_softc, sizeof(apm_softc));
915 vmf.vmf_ah = APM_BIOS;
916 vmf.vmf_al = APM_INSTCHECK;
917 vmf.vmf_bx = 0;
918 if (vm86_intcall(APM_INT, &vmf))
919 return ENXIO; /* APM not found */
920 if (vmf.vmf_bx != 0x504d) {
921 printf("apm: incorrect signature (0x%x)\n", vmf.vmf_bx);
922 return ENXIO;
923 }
924 if ((vmf.vmf_cx & (APM_32BIT_SUPPORT | APM_16BIT_SUPPORT)) == 0) {
925 printf("apm: protected mode connections are not supported\n");
926 return ENXIO;
927 }
928
929 apm_version = vmf.vmf_ax;
930 sc->slow_idle_cpu = ((vmf.vmf_cx & APM_CPUIDLE_SLOW) != 0);
931 sc->disabled = ((vmf.vmf_cx & APM_DISABLED) != 0);
932 sc->disengaged = ((vmf.vmf_cx & APM_DISENGAGED) != 0);
933
934 vmf.vmf_ah = APM_BIOS;
935 vmf.vmf_al = APM_DISCONNECT;
936 vmf.vmf_bx = 0;
937 vm86_intcall(APM_INT, &vmf); /* disconnect, just in case */
938
939 #ifdef PC98
940 /* PC98 have bogos APM 32bit BIOS */
941 if ((vmf.vmf_cx & APM_32BIT_SUPPORT) == 0)
942 return ENXIO;
943 rid = 0;
944 bus_set_resource(dev, SYS_RES_IOPORT, rid,
945 APM_NECSMM_PORT, APM_NECSMM_PORTSZ);
946 sc->sc_res = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid,
947 APM_NECSMM_PORT, ~0, APM_NECSMM_PORTSZ, RF_ACTIVE);
948 if (sc->sc_res == NULL) {
949 printf("apm: cannot open NEC smm device\n");
950 return ENXIO;
951 }
952 bus_release_resource(dev, SYS_RES_IOPORT, rid, sc->sc_res);
953
954 vmf.vmf_ah = APM_BIOS;
955 vmf.vmf_al = APM_PROT32CONNECT;
956 vmf.vmf_bx = 0;
957 if (vm86_intcall(APM_INT, &vmf)) {
958 printf("apm: 32-bit connection error.\n");
959 return (ENXIO);
960 }
961
962 sc->bios.seg.code32.base = (vmf.vmf_ax << 4) + APM_KERNBASE;
963 sc->bios.seg.code32.limit = 0xffff;
964 sc->bios.seg.code16.base = (vmf.vmf_cx << 4) + APM_KERNBASE;
965 sc->bios.seg.code16.limit = 0xffff;
966 sc->bios.seg.data.base = (vmf.vmf_dx << 4) + APM_KERNBASE;
967 sc->bios.seg.data.limit = 0xffff;
968 sc->bios.entry = vmf.vmf_ebx;
969 sc->connectmode = APM_PROT32CONNECT;
970 #else
971 if ((vmf.vmf_cx & APM_32BIT_SUPPORT) != 0) {
972 vmf.vmf_ah = APM_BIOS;
973 vmf.vmf_al = APM_PROT32CONNECT;
974 vmf.vmf_bx = 0;
975 if (vm86_intcall(APM_INT, &vmf)) {
976 printf("apm: 32-bit connection error.\n");
977 return (ENXIO);
978 }
979 sc->bios.seg.code32.base = (vmf.vmf_ax << 4) + APM_KERNBASE;
980 sc->bios.seg.code32.limit = 0xffff;
981 sc->bios.seg.code16.base = (vmf.vmf_cx << 4) + APM_KERNBASE;
982 sc->bios.seg.code16.limit = 0xffff;
983 sc->bios.seg.data.base = (vmf.vmf_dx << 4) + APM_KERNBASE;
984 sc->bios.seg.data.limit = 0xffff;
985 sc->bios.entry = vmf.vmf_ebx;
986 sc->connectmode = APM_PROT32CONNECT;
987 } else {
988 /* use 16-bit connection */
989 vmf.vmf_ah = APM_BIOS;
990 vmf.vmf_al = APM_PROT16CONNECT;
991 vmf.vmf_bx = 0;
992 if (vm86_intcall(APM_INT, &vmf)) {
993 printf("apm: 16-bit connection error.\n");
994 return (ENXIO);
995 }
996 sc->bios.seg.code16.base = (vmf.vmf_ax << 4) + APM_KERNBASE;
997 sc->bios.seg.code16.limit = 0xffff;
998 sc->bios.seg.data.base = (vmf.vmf_cx << 4) + APM_KERNBASE;
999 sc->bios.seg.data.limit = 0xffff;
1000 sc->bios.entry = vmf.vmf_bx;
1001 sc->connectmode = APM_PROT16CONNECT;
1002 }
1003 #endif
1004 return(0);
1005 }
1006
1007
1008 /*
1009 * return 0 if the user will notice and handle the event,
1010 * return 1 if the kernel driver should do so.
1011 */
1012 static int
apm_record_event(struct apm_softc * sc,u_int event_type)1013 apm_record_event(struct apm_softc *sc, u_int event_type)
1014 {
1015 struct apm_event_info *evp;
1016
1017 if ((sc->sc_flags & SCFLAG_OPEN) == 0)
1018 return 1; /* no user waiting */
1019 if (sc->event_count == APM_NEVENTS)
1020 return 1; /* overflow */
1021 if (sc->event_filter[event_type] == 0)
1022 return 1; /* not registered */
1023 evp = &sc->event_list[sc->event_ptr];
1024 sc->event_count++;
1025 sc->event_ptr++;
1026 sc->event_ptr %= APM_NEVENTS;
1027 evp->type = event_type;
1028 evp->index = ++apm_evindex;
1029 selwakeuppri(&sc->sc_rsel, PZERO);
1030 return (sc->sc_flags & SCFLAG_OCTL) ? 0 : 1; /* user may handle */
1031 }
1032
1033 /* Power profile */
1034 static void
apm_power_profile(struct apm_softc * sc)1035 apm_power_profile(struct apm_softc *sc)
1036 {
1037 int state;
1038 struct apm_info info;
1039 static int apm_acline = 0;
1040
1041 if (apm_get_info(&info))
1042 return;
1043
1044 if (apm_acline != info.ai_acline) {
1045 apm_acline = info.ai_acline;
1046 state = apm_acline ? POWER_PROFILE_PERFORMANCE : POWER_PROFILE_ECONOMY;
1047 power_profile_set_state(state);
1048 }
1049 }
1050
1051 /* Process APM event */
1052 static void
apm_processevent(void)1053 apm_processevent(void)
1054 {
1055 int apm_event;
1056 struct apm_softc *sc = &apm_softc;
1057
1058 #define OPMEV_DEBUGMESSAGE(symbol) case symbol: \
1059 APM_DPRINT("Received APM Event: " #symbol "\n");
1060
1061 do {
1062 apm_event = apm_getevent();
1063 switch (apm_event) {
1064 OPMEV_DEBUGMESSAGE(PMEV_STANDBYREQ);
1065 if (apm_op_inprog == 0) {
1066 apm_op_inprog++;
1067 if (apm_record_event(sc, apm_event)) {
1068 apm_suspend(PMST_STANDBY);
1069 }
1070 }
1071 break;
1072 OPMEV_DEBUGMESSAGE(PMEV_USERSTANDBYREQ);
1073 if (apm_op_inprog == 0) {
1074 apm_op_inprog++;
1075 if (apm_record_event(sc, apm_event)) {
1076 apm_suspend(PMST_STANDBY);
1077 }
1078 }
1079 break;
1080 OPMEV_DEBUGMESSAGE(PMEV_SUSPENDREQ);
1081 apm_lastreq_notify();
1082 if (apm_op_inprog == 0) {
1083 apm_op_inprog++;
1084 if (apm_record_event(sc, apm_event)) {
1085 apm_do_suspend();
1086 }
1087 }
1088 return; /* XXX skip the rest */
1089 OPMEV_DEBUGMESSAGE(PMEV_USERSUSPENDREQ);
1090 apm_lastreq_notify();
1091 if (apm_op_inprog == 0) {
1092 apm_op_inprog++;
1093 if (apm_record_event(sc, apm_event)) {
1094 apm_do_suspend();
1095 }
1096 }
1097 return; /* XXX skip the rest */
1098 OPMEV_DEBUGMESSAGE(PMEV_CRITSUSPEND);
1099 apm_do_suspend();
1100 break;
1101 OPMEV_DEBUGMESSAGE(PMEV_NORMRESUME);
1102 apm_record_event(sc, apm_event);
1103 apm_resume();
1104 break;
1105 OPMEV_DEBUGMESSAGE(PMEV_CRITRESUME);
1106 apm_record_event(sc, apm_event);
1107 apm_resume();
1108 break;
1109 OPMEV_DEBUGMESSAGE(PMEV_STANDBYRESUME);
1110 apm_record_event(sc, apm_event);
1111 break;
1112 OPMEV_DEBUGMESSAGE(PMEV_BATTERYLOW);
1113 if (apm_record_event(sc, apm_event)) {
1114 apm_battery_low();
1115 apm_suspend(PMST_SUSPEND);
1116 }
1117 break;
1118 OPMEV_DEBUGMESSAGE(PMEV_POWERSTATECHANGE);
1119 apm_record_event(sc, apm_event);
1120 apm_power_profile(sc);
1121 break;
1122 OPMEV_DEBUGMESSAGE(PMEV_UPDATETIME);
1123 apm_record_event(sc, apm_event);
1124 inittodr(0); /* adjust time to RTC */
1125 break;
1126 OPMEV_DEBUGMESSAGE(PMEV_CAPABILITIESCHANGE);
1127 apm_record_event(sc, apm_event);
1128 apm_power_profile(sc);
1129 break;
1130 case PMEV_NOEVENT:
1131 break;
1132 default:
1133 printf("Unknown Original APM Event 0x%x\n", apm_event);
1134 break;
1135 }
1136 } while (apm_event != PMEV_NOEVENT);
1137 #ifdef PC98
1138 apm_disable_smm(sc);
1139 #endif
1140 }
1141
1142 /*
1143 * Attach APM:
1144 *
1145 * Initialize APM driver
1146 */
1147
1148 static int
apm_attach(device_t dev)1149 apm_attach(device_t dev)
1150 {
1151 struct apm_softc *sc = &apm_softc;
1152 int drv_version;
1153 #ifdef PC98
1154 int rid;
1155 #endif
1156 mtx_init(&sc->mtx, device_get_nameunit(dev), "apm", MTX_DEF);
1157 cv_init(&sc->cv, "cbb cv");
1158
1159 #ifndef PC98
1160 if (device_get_flags(dev) & 0x20)
1161 atrtcclock_disable = 1;
1162 #endif
1163
1164 sc->initialized = 0;
1165
1166 /* Must be externally enabled */
1167 sc->active = 0;
1168
1169 /* Always call HLT in idle loop */
1170 sc->always_halt_cpu = 1;
1171
1172 getenv_int("debug.apm_debug", &apm_debug);
1173
1174 /* print bootstrap messages */
1175 APM_DPRINT("apm: APM BIOS version %04lx\n", apm_version);
1176 APM_DPRINT("apm: Code16 0x%08x, Data 0x%08x\n",
1177 sc->bios.seg.code16.base, sc->bios.seg.data.base);
1178 APM_DPRINT("apm: Code entry 0x%08x, Idling CPU %s, Management %s\n",
1179 sc->bios.entry, is_enabled(sc->slow_idle_cpu),
1180 is_enabled(!sc->disabled));
1181 APM_DPRINT("apm: CS_limit=0x%x, DS_limit=0x%x\n",
1182 sc->bios.seg.code16.limit, sc->bios.seg.data.limit);
1183
1184 #ifdef PC98
1185 rid = 0;
1186 sc->sc_res = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid,
1187 APM_NECSMM_PORT, ~0, APM_NECSMM_PORTSZ, RF_ACTIVE);
1188 if (sc->sc_res == NULL)
1189 panic("%s: counldn't map I/O ports", device_get_name(dev));
1190 sc->sc_iot = rman_get_bustag(sc->sc_res);
1191 sc->sc_ioh = rman_get_bushandle(sc->sc_res);
1192
1193 if (apm_version==0x112 || apm_version==0x111 || apm_version==0x110)
1194 apm_necsmm_addr = APM_NECSMM_PORT;
1195 else
1196 apm_necsmm_addr = 0;
1197 apm_necsmm_mask = ~APM_NECSMM_EN;
1198 #endif /* PC98 */
1199
1200 /*
1201 * In one test, apm bios version was 1.02; an attempt to register
1202 * a 1.04 driver resulted in a 1.00 connection! Registering a
1203 * 1.02 driver resulted in a 1.02 connection.
1204 */
1205 drv_version = apm_version > 0x102 ? 0x102 : apm_version;
1206 for (; drv_version > 0x100; drv_version--)
1207 if (apm_driver_version(drv_version) == 0)
1208 break;
1209 sc->minorversion = ((drv_version & 0x00f0) >> 4) * 10 +
1210 ((drv_version & 0x000f) >> 0);
1211 sc->majorversion = ((drv_version & 0xf000) >> 12) * 10 +
1212 ((apm_version & 0x0f00) >> 8);
1213
1214 sc->intversion = INTVERSION(sc->majorversion, sc->minorversion);
1215
1216 if (sc->intversion >= INTVERSION(1, 1))
1217 APM_DPRINT("apm: Engaged control %s\n", is_enabled(!sc->disengaged));
1218 device_printf(dev, "found APM BIOS v%ld.%ld, connected at v%d.%d\n",
1219 ((apm_version & 0xf000) >> 12) * 10 + ((apm_version & 0x0f00) >> 8),
1220 ((apm_version & 0x00f0) >> 4) * 10 + ((apm_version & 0x000f) >> 0),
1221 sc->majorversion, sc->minorversion);
1222
1223
1224 APM_DPRINT("apm: Slow Idling CPU %s\n", is_enabled(sc->slow_idle_cpu));
1225 /* enable power management */
1226 if (sc->disabled) {
1227 if (apm_enable_disable_pm(1)) {
1228 APM_DPRINT("apm: *Warning* enable function failed! [%x]\n",
1229 (sc->bios.r.eax >> 8) & 0xff);
1230 }
1231 }
1232
1233 /* engage power managment (APM 1.1 or later) */
1234 if (sc->intversion >= INTVERSION(1, 1) && sc->disengaged) {
1235 if (apm_engage_disengage_pm(1)) {
1236 APM_DPRINT("apm: *Warning* engage function failed err=[%x]",
1237 (sc->bios.r.eax >> 8) & 0xff);
1238 APM_DPRINT(" (Docked or using external power?).\n");
1239 }
1240 }
1241
1242 /* Power the system off using APM */
1243 EVENTHANDLER_REGISTER(shutdown_final, apm_power_off, NULL,
1244 SHUTDOWN_PRI_LAST);
1245
1246 /* Register APM again to pass the correct argument of pm_func. */
1247 power_pm_register(POWER_PM_TYPE_APM, apm_pm_func, sc);
1248
1249 sc->initialized = 1;
1250 sc->suspending = 0;
1251 sc->running = 0;
1252
1253 make_dev(&apm_cdevsw, APMDEV_NORMAL,
1254 UID_ROOT, GID_OPERATOR, 0664, "apm");
1255 make_dev(&apm_cdevsw, APMDEV_CTL,
1256 UID_ROOT, GID_OPERATOR, 0660, "apmctl");
1257 return 0;
1258 }
1259
1260 static int
apmopen(struct cdev * dev,int flag,int fmt,struct thread * td)1261 apmopen(struct cdev *dev, int flag, int fmt, struct thread *td)
1262 {
1263 struct apm_softc *sc = &apm_softc;
1264
1265 if (sc == NULL || sc->initialized == 0)
1266 return (ENXIO);
1267
1268 switch (dev2unit(dev)) {
1269 case APMDEV_CTL:
1270 if (!(flag & FWRITE))
1271 return EINVAL;
1272 if (sc->sc_flags & SCFLAG_OCTL)
1273 return EBUSY;
1274 sc->sc_flags |= SCFLAG_OCTL;
1275 bzero(sc->event_filter, sizeof sc->event_filter);
1276 break;
1277 case APMDEV_NORMAL:
1278 sc->sc_flags |= SCFLAG_ONORMAL;
1279 break;
1280 }
1281 return 0;
1282 }
1283
1284 static int
apmclose(struct cdev * dev,int flag,int fmt,struct thread * td)1285 apmclose(struct cdev *dev, int flag, int fmt, struct thread *td)
1286 {
1287 struct apm_softc *sc = &apm_softc;
1288
1289 switch (dev2unit(dev)) {
1290 case APMDEV_CTL:
1291 apm_lastreq_rejected();
1292 sc->sc_flags &= ~SCFLAG_OCTL;
1293 bzero(sc->event_filter, sizeof sc->event_filter);
1294 break;
1295 case APMDEV_NORMAL:
1296 sc->sc_flags &= ~SCFLAG_ONORMAL;
1297 break;
1298 }
1299 if ((sc->sc_flags & SCFLAG_OPEN) == 0) {
1300 sc->event_count = 0;
1301 sc->event_ptr = 0;
1302 }
1303 return 0;
1304 }
1305
1306 static int
apmioctl(struct cdev * dev,u_long cmd,caddr_t addr,int flag,struct thread * td)1307 apmioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flag, struct thread *td)
1308 {
1309 struct apm_softc *sc = &apm_softc;
1310 struct apm_bios_arg *args;
1311 int error = 0;
1312 int ret;
1313 int newstate;
1314
1315 if (sc == NULL || sc->initialized == 0)
1316 return (ENXIO);
1317
1318 APM_DPRINT("APM ioctl: cmd = 0x%lx\n", cmd);
1319 switch (cmd) {
1320 case APMIO_SUSPEND:
1321 if (!(flag & FWRITE))
1322 return (EPERM);
1323 if (sc->active)
1324 apm_suspend(PMST_SUSPEND);
1325 else
1326 error = EINVAL;
1327 break;
1328
1329 case APMIO_STANDBY:
1330 if (!(flag & FWRITE))
1331 return (EPERM);
1332 if (sc->active)
1333 apm_suspend(PMST_STANDBY);
1334 else
1335 error = EINVAL;
1336 break;
1337
1338 case APMIO_GETINFO_OLD:
1339 {
1340 struct apm_info info;
1341 apm_info_old_t aiop;
1342
1343 if (apm_get_info(&info))
1344 error = ENXIO;
1345 aiop = (apm_info_old_t)addr;
1346 aiop->ai_major = info.ai_major;
1347 aiop->ai_minor = info.ai_minor;
1348 aiop->ai_acline = info.ai_acline;
1349 aiop->ai_batt_stat = info.ai_batt_stat;
1350 aiop->ai_batt_life = info.ai_batt_life;
1351 aiop->ai_status = info.ai_status;
1352 }
1353 break;
1354 case APMIO_GETINFO:
1355 if (apm_get_info((apm_info_t)addr))
1356 error = ENXIO;
1357 break;
1358 case APMIO_GETPWSTATUS:
1359 if (apm_get_pwstatus((apm_pwstatus_t)addr))
1360 error = ENXIO;
1361 break;
1362 case APMIO_ENABLE:
1363 if (!(flag & FWRITE))
1364 return (EPERM);
1365 apm_event_enable();
1366 break;
1367 case APMIO_DISABLE:
1368 if (!(flag & FWRITE))
1369 return (EPERM);
1370 apm_event_disable();
1371 break;
1372 case APMIO_HALTCPU:
1373 if (!(flag & FWRITE))
1374 return (EPERM);
1375 apm_halt_cpu();
1376 break;
1377 case APMIO_NOTHALTCPU:
1378 if (!(flag & FWRITE))
1379 return (EPERM);
1380 apm_not_halt_cpu();
1381 break;
1382 case APMIO_DISPLAY:
1383 if (!(flag & FWRITE))
1384 return (EPERM);
1385 newstate = *(int *)addr;
1386 if (apm_display(newstate))
1387 error = ENXIO;
1388 break;
1389 case APMIO_BIOS:
1390 if (!(flag & FWRITE))
1391 return (EPERM);
1392 /* XXX compatibility with the old interface */
1393 args = (struct apm_bios_arg *)addr;
1394 #ifdef PC98
1395 if (((args->eax >> 8) & 0xff) == 0x53) {
1396 sc->bios.r.eax = args->eax & ~0xffff;
1397 sc->bios.r.eax |= APM_BIOS << 8;
1398 switch (args->eax & 0xff) {
1399 case 0x0a:
1400 sc->bios.r.eax |= APM_GETPWSTATUS;
1401 break;
1402 case 0x0e:
1403 sc->bios.r.eax |= APM_DRVVERSION;
1404 break;
1405 default:
1406 sc->bios.r.eax |= args->eax & 0xff;
1407 break;
1408 }
1409 } else
1410 #endif
1411 sc->bios.r.eax = args->eax;
1412 sc->bios.r.ebx = args->ebx;
1413 sc->bios.r.ecx = args->ecx;
1414 sc->bios.r.edx = args->edx;
1415 sc->bios.r.esi = args->esi;
1416 sc->bios.r.edi = args->edi;
1417 if ((ret = apm_bioscall())) {
1418 /*
1419 * Return code 1 means bios call was unsuccessful.
1420 * Error code is stored in %ah.
1421 * Return code -1 means bios call was unsupported
1422 * in the APM BIOS version.
1423 */
1424 if (ret == -1) {
1425 error = EINVAL;
1426 }
1427 } else {
1428 /*
1429 * Return code 0 means bios call was successful.
1430 * We need only %al and can discard %ah.
1431 */
1432 sc->bios.r.eax &= 0xff;
1433 }
1434 args->eax = sc->bios.r.eax;
1435 args->ebx = sc->bios.r.ebx;
1436 args->ecx = sc->bios.r.ecx;
1437 args->edx = sc->bios.r.edx;
1438 args->esi = sc->bios.r.esi;
1439 args->edi = sc->bios.r.edi;
1440 break;
1441 default:
1442 error = EINVAL;
1443 break;
1444 }
1445
1446 /* for /dev/apmctl */
1447 if (dev2unit(dev) == APMDEV_CTL) {
1448 struct apm_event_info *evp;
1449 int i;
1450
1451 error = 0;
1452 switch (cmd) {
1453 case APMIO_NEXTEVENT:
1454 if (!sc->event_count) {
1455 error = EAGAIN;
1456 } else {
1457 evp = (struct apm_event_info *)addr;
1458 i = sc->event_ptr + APM_NEVENTS - sc->event_count;
1459 i %= APM_NEVENTS;
1460 *evp = sc->event_list[i];
1461 sc->event_count--;
1462 }
1463 break;
1464 case APMIO_REJECTLASTREQ:
1465 if (apm_lastreq_rejected()) {
1466 error = EINVAL;
1467 }
1468 break;
1469 default:
1470 error = EINVAL;
1471 break;
1472 }
1473 }
1474
1475 return error;
1476 }
1477
1478 static int
apmwrite(struct cdev * dev,struct uio * uio,int ioflag)1479 apmwrite(struct cdev *dev, struct uio *uio, int ioflag)
1480 {
1481 struct apm_softc *sc = &apm_softc;
1482 u_int event_type;
1483 int error;
1484 u_char enabled;
1485
1486 if (dev2unit(dev) != APMDEV_CTL)
1487 return(ENODEV);
1488 if (uio->uio_resid != sizeof(u_int))
1489 return(E2BIG);
1490
1491 if ((error = uiomove((caddr_t)&event_type, sizeof(u_int), uio)))
1492 return(error);
1493
1494 if (event_type < 0 || event_type >= APM_NPMEV)
1495 return(EINVAL);
1496
1497 if (sc->event_filter[event_type] == 0) {
1498 enabled = 1;
1499 } else {
1500 enabled = 0;
1501 }
1502 sc->event_filter[event_type] = enabled;
1503 APM_DPRINT("apmwrite: event 0x%x %s\n", event_type, is_enabled(enabled));
1504
1505 return uio->uio_resid;
1506 }
1507
1508 static int
apmpoll(struct cdev * dev,int events,struct thread * td)1509 apmpoll(struct cdev *dev, int events, struct thread *td)
1510 {
1511 struct apm_softc *sc = &apm_softc;
1512 int revents = 0;
1513
1514 if (events & (POLLIN | POLLRDNORM)) {
1515 if (sc->event_count) {
1516 revents |= events & (POLLIN | POLLRDNORM);
1517 } else {
1518 selrecord(td, &sc->sc_rsel);
1519 }
1520 }
1521
1522 return (revents);
1523 }
1524
1525 static device_method_t apm_methods[] = {
1526 /* Device interface */
1527 DEVMETHOD(device_identify, apm_identify),
1528 DEVMETHOD(device_probe, apm_probe),
1529 DEVMETHOD(device_attach, apm_attach),
1530
1531 { 0, 0 }
1532 };
1533
1534 static driver_t apm_driver = {
1535 "apm",
1536 apm_methods,
1537 1, /* no softc (XXX) */
1538 };
1539
1540 static devclass_t apm_devclass;
1541
1542 DRIVER_MODULE(apm, legacy, apm_driver, apm_devclass, apm_modevent, 0);
1543 MODULE_VERSION(apm, 1);
1544
1545 static int
apm_pm_func(u_long cmd,void * arg,...)1546 apm_pm_func(u_long cmd, void *arg, ...)
1547 {
1548 int state, apm_state;
1549 int error;
1550 va_list ap;
1551
1552 error = 0;
1553 switch (cmd) {
1554 case POWER_CMD_SUSPEND:
1555 va_start(ap, arg);
1556 state = va_arg(ap, int);
1557 va_end(ap);
1558
1559 switch (state) {
1560 case POWER_SLEEP_STATE_STANDBY:
1561 apm_state = PMST_STANDBY;
1562 break;
1563 case POWER_SLEEP_STATE_SUSPEND:
1564 case POWER_SLEEP_STATE_HIBERNATE:
1565 apm_state = PMST_SUSPEND;
1566 break;
1567 default:
1568 error = EINVAL;
1569 goto out;
1570 }
1571
1572 apm_suspend(apm_state);
1573 break;
1574
1575 default:
1576 error = EINVAL;
1577 goto out;
1578 }
1579
1580 out:
1581 return (error);
1582 }
1583
1584 static void
apm_pm_register(void * arg)1585 apm_pm_register(void *arg)
1586 {
1587
1588 if (!resource_disabled("apm", 0))
1589 power_pm_register(POWER_PM_TYPE_APM, apm_pm_func, NULL);
1590 }
1591
1592 SYSINIT(power, SI_SUB_KLD, SI_ORDER_ANY, apm_pm_register, NULL);
1593