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: stable/10/sys/i386/bios/apm.c 241885 2012-10-22 13:06:09Z eadler $");
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 TUNABLE_INT("machdep.apm_swab_batt_minutes", &apm_swab_batt_minutes);
138 SYSCTL_INT(_machdep, OID_AUTO, apm_swab_batt_minutes, CTLFLAG_RW,
139 &apm_swab_batt_minutes, 0, "Byte swap battery time value.");
140
141 #ifdef PC98
142 static __inline void
apm_enable_smm(sc)143 apm_enable_smm(sc)
144 struct apm_softc *sc;
145 {
146 bus_space_tag_t iot = sc->sc_iot;
147 bus_space_handle_t ioh = sc->sc_ioh;
148 if (apm_necsmm_addr != 0)
149 bus_space_write_1(iot, ioh, 0,
150 (bus_space_read_1(iot, ioh, 0) | ~apm_necsmm_mask));
151 }
152
153 static __inline void
apm_disable_smm(sc)154 apm_disable_smm(sc)
155 struct apm_softc *sc;
156 {
157 bus_space_tag_t iot = sc->sc_iot;
158 bus_space_handle_t ioh = sc->sc_ioh;
159 if (apm_necsmm_addr != 0)
160 bus_space_write_1(iot, ioh, 0,
161 (bus_space_read_1(iot, ioh, 0) & apm_necsmm_mask));
162 }
163 #endif
164
165 /*
166 * return 0 if the function successfull,
167 * return 1 if the function unsuccessfull,
168 * return -1 if the function unsupported.
169 */
170 static int
apm_bioscall(void)171 apm_bioscall(void)
172 {
173 struct apm_softc *sc = &apm_softc;
174 int errno = 0;
175 u_int apm_func = sc->bios.r.eax & 0xff;
176
177 if (!apm_check_function_supported(sc->intversion, apm_func)) {
178 APM_DPRINT("apm_bioscall: function 0x%x is not supported in v%d.%d\n",
179 apm_func, sc->majorversion, sc->minorversion);
180 return (-1);
181 }
182
183 sc->bios_busy = 1;
184 #ifdef PC98
185 set_bios_selectors(&sc->bios.seg, BIOSCODE_FLAG | BIOSDATA_FLAG);
186 if (bios32_apm98(&sc->bios.r, sc->bios.entry,
187 GSEL(GBIOSCODE32_SEL, SEL_KPL)) != 0)
188 return 1;
189 #else
190 if (sc->connectmode == APM_PROT32CONNECT) {
191 set_bios_selectors(&sc->bios.seg,
192 BIOSCODE_FLAG | BIOSDATA_FLAG);
193 errno = bios32(&sc->bios.r,
194 sc->bios.entry, GSEL(GBIOSCODE32_SEL, SEL_KPL));
195 } else {
196 errno = bios16(&sc->bios, NULL);
197 }
198 #endif
199 sc->bios_busy = 0;
200 return (errno);
201 }
202
203 /* check whether APM function is supported (1) or not (0). */
204 static int
apm_check_function_supported(u_int version,u_int func)205 apm_check_function_supported(u_int version, u_int func)
206 {
207 /* except driver version */
208 if (func == APM_DRVVERSION) {
209 return (1);
210 }
211 #ifdef PC98
212 if (func == APM_GETPWSTATUS) {
213 return (1);
214 }
215 #endif
216
217 switch (version) {
218 case INTVERSION(1, 0):
219 if (func > APM_GETPMEVENT) {
220 return (0); /* not supported */
221 }
222 break;
223 case INTVERSION(1, 1):
224 if (func > APM_ENGAGEDISENGAGEPM &&
225 func < APM_OEMFUNC) {
226 return (0); /* not supported */
227 }
228 break;
229 case INTVERSION(1, 2):
230 break;
231 }
232
233 return (1); /* supported */
234 }
235
236 /* enable/disable power management */
237 static int
apm_enable_disable_pm(int enable)238 apm_enable_disable_pm(int enable)
239 {
240 struct apm_softc *sc = &apm_softc;
241
242 sc->bios.r.eax = (APM_BIOS << 8) | APM_ENABLEDISABLEPM;
243
244 if (sc->intversion >= INTVERSION(1, 1))
245 sc->bios.r.ebx = PMDV_ALLDEV;
246 else
247 sc->bios.r.ebx = 0xffff; /* APM version 1.0 only */
248 sc->bios.r.ecx = enable;
249 sc->bios.r.edx = 0;
250 return (apm_bioscall());
251 }
252
253 /* register driver version (APM 1.1 or later) */
254 static int
apm_driver_version(int version)255 apm_driver_version(int version)
256 {
257 struct apm_softc *sc = &apm_softc;
258
259 sc->bios.r.eax = (APM_BIOS << 8) | APM_DRVVERSION;
260 sc->bios.r.ebx = 0x0;
261 sc->bios.r.ecx = version;
262 sc->bios.r.edx = 0;
263
264 if (apm_bioscall() == 0 && sc->bios.r.eax == version)
265 return (0);
266
267 /* Some old BIOSes don't return the connection version in %ax. */
268 if (sc->bios.r.eax == ((APM_BIOS << 8) | APM_DRVVERSION))
269 return (0);
270
271 return (1);
272 }
273
274 /* engage/disengage power management (APM 1.1 or later) */
275 static int
apm_engage_disengage_pm(int engage)276 apm_engage_disengage_pm(int engage)
277 {
278 struct apm_softc *sc = &apm_softc;
279
280 sc->bios.r.eax = (APM_BIOS << 8) | APM_ENGAGEDISENGAGEPM;
281 sc->bios.r.ebx = PMDV_ALLDEV;
282 sc->bios.r.ecx = engage;
283 sc->bios.r.edx = 0;
284 return (apm_bioscall());
285 }
286
287 /* get PM event */
288 static u_int
apm_getevent(void)289 apm_getevent(void)
290 {
291 struct apm_softc *sc = &apm_softc;
292
293 sc->bios.r.eax = (APM_BIOS << 8) | APM_GETPMEVENT;
294
295 sc->bios.r.ebx = 0;
296 sc->bios.r.ecx = 0;
297 sc->bios.r.edx = 0;
298 if (apm_bioscall())
299 return (PMEV_NOEVENT);
300 return (sc->bios.r.ebx & 0xffff);
301 }
302
303 /* suspend entire system */
304 static int
apm_suspend_system(int state)305 apm_suspend_system(int state)
306 {
307 struct apm_softc *sc = &apm_softc;
308
309 sc->bios.r.eax = (APM_BIOS << 8) | APM_SETPWSTATE;
310 sc->bios.r.ebx = PMDV_ALLDEV;
311 sc->bios.r.ecx = state;
312 sc->bios.r.edx = 0;
313
314 #ifdef PC98
315 apm_disable_smm(sc);
316 #endif
317 if (apm_bioscall()) {
318 printf("Entire system suspend failure: errcode = %d\n",
319 0xff & (sc->bios.r.eax >> 8));
320 return 1;
321 }
322 #ifdef PC98
323 apm_enable_smm(sc);
324 #endif
325 return 0;
326 }
327
328 /* Display control */
329 /*
330 * Experimental implementation: My laptop machine can't handle this function
331 * If your laptop can control the display via APM, please inform me.
332 * HOSOKAWA, Tatsumi <hosokawa@jp.FreeBSD.org>
333 */
334 int
apm_display(int newstate)335 apm_display(int newstate)
336 {
337 struct apm_softc *sc = &apm_softc;
338
339 sc->bios.r.eax = (APM_BIOS << 8) | APM_SETPWSTATE;
340 sc->bios.r.ebx = PMDV_DISP0;
341 sc->bios.r.ecx = newstate ? PMST_APMENABLED:PMST_SUSPEND;
342 sc->bios.r.edx = 0;
343 if (apm_bioscall() == 0) {
344 return 0;
345 }
346
347 /* If failed, then try to blank all display devices instead. */
348 sc->bios.r.eax = (APM_BIOS << 8) | APM_SETPWSTATE;
349 sc->bios.r.ebx = PMDV_DISPALL; /* all display devices */
350 sc->bios.r.ecx = newstate ? PMST_APMENABLED:PMST_SUSPEND;
351 sc->bios.r.edx = 0;
352 if (apm_bioscall() == 0) {
353 return 0;
354 }
355 printf("Display off failure: errcode = %d\n",
356 0xff & (sc->bios.r.eax >> 8));
357 return 1;
358 }
359
360 /*
361 * Turn off the entire system.
362 */
363 static void
apm_power_off(void * junk,int howto)364 apm_power_off(void *junk, int howto)
365 {
366 struct apm_softc *sc = &apm_softc;
367
368 /* Not halting powering off, or not active */
369 if (!(howto & RB_POWEROFF) || !apm_softc.active)
370 return;
371 sc->bios.r.eax = (APM_BIOS << 8) | APM_SETPWSTATE;
372 sc->bios.r.ebx = PMDV_ALLDEV;
373 sc->bios.r.ecx = PMST_OFF;
374 sc->bios.r.edx = 0;
375 (void) apm_bioscall();
376 }
377
378 /* APM Battery low handler */
379 static void
apm_battery_low(void)380 apm_battery_low(void)
381 {
382 printf("\007\007 * * * BATTERY IS LOW * * * \007\007");
383 }
384
385 /* APM hook manager */
386 static struct apmhook *
apm_add_hook(struct apmhook ** list,struct apmhook * ah)387 apm_add_hook(struct apmhook **list, struct apmhook *ah)
388 {
389 int s;
390 struct apmhook *p, *prev;
391
392 APM_DPRINT("Add hook \"%s\"\n", ah->ah_name);
393
394 s = splhigh();
395 if (ah == NULL)
396 panic("illegal apm_hook!");
397 prev = NULL;
398 for (p = *list; p != NULL; prev = p, p = p->ah_next)
399 if (p->ah_order > ah->ah_order)
400 break;
401
402 if (prev == NULL) {
403 ah->ah_next = *list;
404 *list = ah;
405 } else {
406 ah->ah_next = prev->ah_next;
407 prev->ah_next = ah;
408 }
409 splx(s);
410 return ah;
411 }
412
413 static void
apm_del_hook(struct apmhook ** list,struct apmhook * ah)414 apm_del_hook(struct apmhook **list, struct apmhook *ah)
415 {
416 int s;
417 struct apmhook *p, *prev;
418
419 s = splhigh();
420 prev = NULL;
421 for (p = *list; p != NULL; prev = p, p = p->ah_next)
422 if (p == ah)
423 goto deleteit;
424 panic("Tried to delete unregistered apm_hook.");
425 goto nosuchnode;
426 deleteit:
427 if (prev != NULL)
428 prev->ah_next = p->ah_next;
429 else
430 *list = p->ah_next;
431 nosuchnode:
432 splx(s);
433 }
434
435
436 /* APM driver calls some functions automatically */
437 static void
apm_execute_hook(struct apmhook * list)438 apm_execute_hook(struct apmhook *list)
439 {
440 struct apmhook *p;
441
442 for (p = list; p != NULL; p = p->ah_next) {
443 APM_DPRINT("Execute APM hook \"%s.\"\n", p->ah_name);
444 if ((*(p->ah_fun))(p->ah_arg))
445 printf("Warning: APM hook \"%s\" failed", p->ah_name);
446 }
447 }
448
449
450 /* establish an apm hook */
451 struct apmhook *
apm_hook_establish(int apmh,struct apmhook * ah)452 apm_hook_establish(int apmh, struct apmhook *ah)
453 {
454 if (apmh < 0 || apmh >= NAPM_HOOK)
455 return NULL;
456
457 return apm_add_hook(&hook[apmh], ah);
458 }
459
460 /* disestablish an apm hook */
461 void
apm_hook_disestablish(int apmh,struct apmhook * ah)462 apm_hook_disestablish(int apmh, struct apmhook *ah)
463 {
464 if (apmh < 0 || apmh >= NAPM_HOOK)
465 return;
466
467 apm_del_hook(&hook[apmh], ah);
468 }
469
470 static int apm_record_event(struct apm_softc *, u_int);
471 static void apm_processevent(void);
472
473 static u_int apm_op_inprog = 0;
474
475 static void
apm_do_suspend(void)476 apm_do_suspend(void)
477 {
478 struct apm_softc *sc = &apm_softc;
479 int error;
480
481 if (sc == NULL || sc->initialized == 0)
482 return;
483
484 apm_op_inprog = 0;
485 sc->suspends = sc->suspend_countdown = 0;
486
487 EVENTHANDLER_INVOKE(power_suspend);
488
489 /*
490 * Be sure to hold Giant across DEVICE_SUSPEND/RESUME since
491 * non-MPSAFE drivers need this.
492 */
493 mtx_lock(&Giant);
494 error = DEVICE_SUSPEND(root_bus);
495 if (error)
496 goto backout;
497
498 apm_execute_hook(hook[APM_HOOK_SUSPEND]);
499 if (apm_suspend_system(PMST_SUSPEND) == 0) {
500 sc->suspending = 1;
501 apm_processevent();
502 mtx_unlock(&Giant);
503 return;
504 }
505
506 /* Failure, 'resume' the system again */
507 apm_execute_hook(hook[APM_HOOK_RESUME]);
508 DEVICE_RESUME(root_bus);
509 backout:
510 mtx_unlock(&Giant);
511 EVENTHANDLER_INVOKE(power_resume);
512 }
513
514 static void
apm_do_standby(void)515 apm_do_standby(void)
516 {
517 struct apm_softc *sc = &apm_softc;
518
519 if (sc == NULL || sc->initialized == 0)
520 return;
521
522 apm_op_inprog = 0;
523 sc->standbys = sc->standby_countdown = 0;
524
525 /*
526 * As far as standby, we don't need to execute
527 * all of suspend hooks.
528 */
529 if (apm_suspend_system(PMST_STANDBY) == 0)
530 apm_processevent();
531 return;
532 }
533
534 static void
apm_lastreq_notify(void)535 apm_lastreq_notify(void)
536 {
537 struct apm_softc *sc = &apm_softc;
538
539 sc->bios.r.eax = (APM_BIOS << 8) | APM_SETPWSTATE;
540 sc->bios.r.ebx = PMDV_ALLDEV;
541 sc->bios.r.ecx = PMST_LASTREQNOTIFY;
542 sc->bios.r.edx = 0;
543 apm_bioscall();
544 }
545
546 static int
apm_lastreq_rejected(void)547 apm_lastreq_rejected(void)
548 {
549 struct apm_softc *sc = &apm_softc;
550
551 if (apm_op_inprog == 0) {
552 return 1; /* no operation in progress */
553 }
554
555 sc->bios.r.eax = (APM_BIOS << 8) | APM_SETPWSTATE;
556 sc->bios.r.ebx = PMDV_ALLDEV;
557 sc->bios.r.ecx = PMST_LASTREQREJECT;
558 sc->bios.r.edx = 0;
559
560 if (apm_bioscall()) {
561 APM_DPRINT("apm_lastreq_rejected: failed\n");
562 return 1;
563 }
564 apm_op_inprog = 0;
565 return 0;
566 }
567
568 /*
569 * Public interface to the suspend/resume:
570 *
571 * Execute suspend and resume hook before and after sleep, respectively.
572 *
573 */
574
575 void
apm_suspend(int state)576 apm_suspend(int state)
577 {
578 struct apm_softc *sc = &apm_softc;
579
580 if (sc == NULL || sc->initialized == 0)
581 return;
582
583 switch (state) {
584 case PMST_SUSPEND:
585 if (sc->suspends)
586 return;
587 sc->suspends++;
588 sc->suspend_countdown = apm_suspend_delay;
589 break;
590 case PMST_STANDBY:
591 if (sc->standbys)
592 return;
593 sc->standbys++;
594 sc->standby_countdown = apm_standby_delay;
595 break;
596 default:
597 printf("apm_suspend: Unknown Suspend state 0x%x\n", state);
598 return;
599 }
600
601 apm_op_inprog++;
602 apm_lastreq_notify();
603 }
604
605 static void
apm_resume(void)606 apm_resume(void)
607 {
608 struct apm_softc *sc = &apm_softc;
609
610 if (sc == NULL || sc->initialized == 0 || sc->suspending == 0)
611 return;
612
613 sc->suspending = 0;
614 apm_execute_hook(hook[APM_HOOK_RESUME]);
615 mtx_lock(&Giant);
616 DEVICE_RESUME(root_bus);
617 mtx_unlock(&Giant);
618 EVENTHANDLER_INVOKE(power_resume);
619 }
620
621
622 /* get power status per battery */
623 static int
apm_get_pwstatus(apm_pwstatus_t app)624 apm_get_pwstatus(apm_pwstatus_t app)
625 {
626 struct apm_softc *sc = &apm_softc;
627
628 if (app->ap_device != PMDV_ALLDEV &&
629 (app->ap_device < PMDV_BATT0 || app->ap_device > PMDV_BATT_ALL))
630 return 1;
631
632 sc->bios.r.eax = (APM_BIOS << 8) | APM_GETPWSTATUS;
633 sc->bios.r.ebx = app->ap_device;
634 sc->bios.r.ecx = 0;
635 sc->bios.r.edx = 0xffff; /* default to unknown battery time */
636
637 if (apm_bioscall())
638 return 1;
639
640 app->ap_acline = (sc->bios.r.ebx >> 8) & 0xff;
641 app->ap_batt_stat = sc->bios.r.ebx & 0xff;
642 app->ap_batt_flag = (sc->bios.r.ecx >> 8) & 0xff;
643 app->ap_batt_life = sc->bios.r.ecx & 0xff;
644 sc->bios.r.edx &= 0xffff;
645 if (apm_swab_batt_minutes)
646 sc->bios.r.edx = __bswap16(sc->bios.r.edx) | 0x8000;
647 if (sc->bios.r.edx == 0xffff) /* Time is unknown */
648 app->ap_batt_time = -1;
649 else if (sc->bios.r.edx & 0x8000) /* Time is in minutes */
650 app->ap_batt_time = (sc->bios.r.edx & 0x7fff) * 60;
651 else /* Time is in seconds */
652 app->ap_batt_time = sc->bios.r.edx;
653
654 return 0;
655 }
656
657
658 /* get APM information */
659 static int
apm_get_info(apm_info_t aip)660 apm_get_info(apm_info_t aip)
661 {
662 struct apm_softc *sc = &apm_softc;
663 struct apm_pwstatus aps;
664
665 bzero(&aps, sizeof(aps));
666 aps.ap_device = PMDV_ALLDEV;
667 if (apm_get_pwstatus(&aps))
668 return 1;
669
670 aip->ai_infoversion = 1;
671 aip->ai_acline = aps.ap_acline;
672 aip->ai_batt_stat = aps.ap_batt_stat;
673 aip->ai_batt_life = aps.ap_batt_life;
674 aip->ai_batt_time = aps.ap_batt_time;
675 aip->ai_major = (u_int)sc->majorversion;
676 aip->ai_minor = (u_int)sc->minorversion;
677 aip->ai_status = (u_int)sc->active;
678
679 sc->bios.r.eax = (APM_BIOS << 8) | APM_GETCAPABILITIES;
680 sc->bios.r.ebx = 0;
681 sc->bios.r.ecx = 0;
682 sc->bios.r.edx = 0;
683 if (apm_bioscall()) {
684 aip->ai_batteries = 0xffffffff; /* Unknown */
685 aip->ai_capabilities = 0xff00; /* Unknown, with no bits set */
686 } else {
687 aip->ai_batteries = sc->bios.r.ebx & 0xff;
688 aip->ai_capabilities = sc->bios.r.ecx & 0xff;
689 }
690
691 bzero(aip->ai_spare, sizeof aip->ai_spare);
692
693 return 0;
694 }
695
696
697 /* inform APM BIOS that CPU is idle */
698 void
apm_cpu_idle(void)699 apm_cpu_idle(void)
700 {
701 struct apm_softc *sc = &apm_softc;
702
703 if (sc->active) {
704
705 sc->bios.r.eax = (APM_BIOS <<8) | APM_CPUIDLE;
706 sc->bios.r.edx = sc->bios.r.ecx = sc->bios.r.ebx = 0;
707 (void) apm_bioscall();
708 }
709 /*
710 * Some APM implementation halts CPU in BIOS, whenever
711 * "CPU-idle" function are invoked, but swtch() of
712 * FreeBSD halts CPU, therefore, CPU is halted twice
713 * in the sched loop. It makes the interrupt latency
714 * terribly long and be able to cause a serious problem
715 * in interrupt processing. We prevent it by removing
716 * "hlt" operation from swtch() and managed it under
717 * APM driver.
718 */
719 if (!sc->active || sc->always_halt_cpu)
720 halt(); /* wait for interrupt */
721 }
722
723 /* inform APM BIOS that CPU is busy */
724 void
apm_cpu_busy(void)725 apm_cpu_busy(void)
726 {
727 struct apm_softc *sc = &apm_softc;
728
729 /*
730 * The APM specification says this is only necessary if your BIOS
731 * slows down the processor in the idle task, otherwise it's not
732 * necessary.
733 */
734 if (sc->slow_idle_cpu && sc->active) {
735
736 sc->bios.r.eax = (APM_BIOS <<8) | APM_CPUBUSY;
737 sc->bios.r.edx = sc->bios.r.ecx = sc->bios.r.ebx = 0;
738 apm_bioscall();
739 }
740 }
741
742
743 /*
744 * APM thread loop.
745 *
746 * This routine wakes up from time to time to deal with delaying the
747 * suspend of the system, or other events.
748 */
749 static void
apm_event_thread(void * arg)750 apm_event_thread(void *arg)
751 {
752 struct apm_softc *sc = &apm_softc;
753
754 sc->running = 1;
755 while (sc->active) {
756 if (apm_op_inprog)
757 apm_lastreq_notify();
758 if (sc->standbys && sc->standby_countdown-- <= 0)
759 apm_do_standby();
760 if (sc->suspends && sc->suspend_countdown-- <= 0)
761 apm_do_suspend();
762 if (!sc->bios_busy)
763 apm_processevent();
764 mtx_lock(&sc->mtx);
765 cv_timedwait(&sc->cv, &sc->mtx, 10 * hz / 9);
766 mtx_unlock(&sc->mtx);
767 }
768 sc->running = 0;
769 kproc_exit(0);
770 }
771
772 /* enable APM BIOS */
773 static void
apm_event_enable(void)774 apm_event_enable(void)
775 {
776 struct apm_softc *sc = &apm_softc;
777
778 APM_DPRINT("called apm_event_enable()\n");
779
780 if (sc == NULL || sc->initialized == 0)
781 return;
782
783 /* Start the thread */
784 sc->active = 1;
785 if (kproc_create(apm_event_thread, sc, &sc->event_thread, 0, 0,
786 "apm worker"))
787 panic("Cannot create apm worker thread");
788
789 return;
790 }
791
792 /* disable APM BIOS */
793 static void
apm_event_disable(void)794 apm_event_disable(void)
795 {
796 struct apm_softc *sc = &apm_softc;
797
798 APM_DPRINT("called apm_event_disable()\n");
799
800 if (sc == NULL || sc->initialized == 0)
801 return;
802
803 mtx_lock(&sc->mtx);
804 sc->active = 0;
805 while (sc->running) {
806 cv_broadcast(&sc->cv);
807 msleep(sc->event_thread, &sc->mtx, PWAIT, "apmdie", 0);
808 }
809 mtx_unlock(&sc->mtx);
810 sc->event_thread = NULL;
811 return;
812 }
813
814 /* halt CPU in scheduling loop */
815 static void
apm_halt_cpu(void)816 apm_halt_cpu(void)
817 {
818 struct apm_softc *sc = &apm_softc;
819
820 if (sc == NULL || sc->initialized == 0)
821 return;
822
823 sc->always_halt_cpu = 1;
824
825 return;
826 }
827
828 /* don't halt CPU in scheduling loop */
829 static void
apm_not_halt_cpu(void)830 apm_not_halt_cpu(void)
831 {
832 struct apm_softc *sc = &apm_softc;
833
834 if (sc == NULL || sc->initialized == 0)
835 return;
836
837 sc->always_halt_cpu = 0;
838
839 return;
840 }
841
842 /* device driver definitions */
843
844 /*
845 * Module event
846 */
847
848 static int
apm_modevent(struct module * mod,int event,void * junk)849 apm_modevent(struct module *mod, int event, void *junk)
850 {
851
852 switch (event) {
853 case MOD_LOAD:
854 if (!cold)
855 return (EPERM);
856 break;
857 case MOD_UNLOAD:
858 if (!cold && power_pm_get_type() == POWER_PM_TYPE_APM)
859 return (EBUSY);
860 break;
861 default:
862 break;
863 }
864
865 return (0);
866 }
867
868 /*
869 * Create "connection point"
870 */
871 static void
apm_identify(driver_t * driver,device_t parent)872 apm_identify(driver_t *driver, device_t parent)
873 {
874 device_t child;
875
876 if (!cold) {
877 printf("Don't load this driver from userland!!\n");
878 return;
879 }
880
881 if (resource_disabled("apm", 0))
882 return;
883
884 child = BUS_ADD_CHILD(parent, 0, "apm", 0);
885 if (child == NULL)
886 panic("apm_identify");
887 }
888
889 /*
890 * probe for APM BIOS
891 */
892 static int
apm_probe(device_t dev)893 apm_probe(device_t dev)
894 {
895 #define APM_KERNBASE KERNBASE
896 struct vm86frame vmf;
897 struct apm_softc *sc = &apm_softc;
898 #ifdef PC98
899 int rid;
900 #endif
901
902 device_set_desc(dev, "APM BIOS");
903 if (device_get_unit(dev) > 0) {
904 printf("apm: Only one APM driver supported.\n");
905 return ENXIO;
906 }
907
908 if (power_pm_get_type() != POWER_PM_TYPE_NONE &&
909 power_pm_get_type() != POWER_PM_TYPE_APM) {
910 printf("apm: Other PM system enabled.\n");
911 return ENXIO;
912 }
913
914 bzero(&vmf, sizeof(struct vm86frame)); /* safety */
915 bzero(&apm_softc, sizeof(apm_softc));
916 vmf.vmf_ah = APM_BIOS;
917 vmf.vmf_al = APM_INSTCHECK;
918 vmf.vmf_bx = 0;
919 if (vm86_intcall(APM_INT, &vmf))
920 return ENXIO; /* APM not found */
921 if (vmf.vmf_bx != 0x504d) {
922 printf("apm: incorrect signature (0x%x)\n", vmf.vmf_bx);
923 return ENXIO;
924 }
925 if ((vmf.vmf_cx & (APM_32BIT_SUPPORT | APM_16BIT_SUPPORT)) == 0) {
926 printf("apm: protected mode connections are not supported\n");
927 return ENXIO;
928 }
929
930 apm_version = vmf.vmf_ax;
931 sc->slow_idle_cpu = ((vmf.vmf_cx & APM_CPUIDLE_SLOW) != 0);
932 sc->disabled = ((vmf.vmf_cx & APM_DISABLED) != 0);
933 sc->disengaged = ((vmf.vmf_cx & APM_DISENGAGED) != 0);
934
935 vmf.vmf_ah = APM_BIOS;
936 vmf.vmf_al = APM_DISCONNECT;
937 vmf.vmf_bx = 0;
938 vm86_intcall(APM_INT, &vmf); /* disconnect, just in case */
939
940 #ifdef PC98
941 /* PC98 have bogos APM 32bit BIOS */
942 if ((vmf.vmf_cx & APM_32BIT_SUPPORT) == 0)
943 return ENXIO;
944 rid = 0;
945 bus_set_resource(dev, SYS_RES_IOPORT, rid,
946 APM_NECSMM_PORT, APM_NECSMM_PORTSZ);
947 sc->sc_res = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid,
948 APM_NECSMM_PORT, ~0, APM_NECSMM_PORTSZ, RF_ACTIVE);
949 if (sc->sc_res == NULL) {
950 printf("apm: cannot open NEC smm device\n");
951 return ENXIO;
952 }
953 bus_release_resource(dev, SYS_RES_IOPORT, rid, sc->sc_res);
954
955 vmf.vmf_ah = APM_BIOS;
956 vmf.vmf_al = APM_PROT32CONNECT;
957 vmf.vmf_bx = 0;
958 if (vm86_intcall(APM_INT, &vmf)) {
959 printf("apm: 32-bit connection error.\n");
960 return (ENXIO);
961 }
962
963 sc->bios.seg.code32.base = (vmf.vmf_ax << 4) + APM_KERNBASE;
964 sc->bios.seg.code32.limit = 0xffff;
965 sc->bios.seg.code16.base = (vmf.vmf_cx << 4) + APM_KERNBASE;
966 sc->bios.seg.code16.limit = 0xffff;
967 sc->bios.seg.data.base = (vmf.vmf_dx << 4) + APM_KERNBASE;
968 sc->bios.seg.data.limit = 0xffff;
969 sc->bios.entry = vmf.vmf_ebx;
970 sc->connectmode = APM_PROT32CONNECT;
971 #else
972 if ((vmf.vmf_cx & APM_32BIT_SUPPORT) != 0) {
973 vmf.vmf_ah = APM_BIOS;
974 vmf.vmf_al = APM_PROT32CONNECT;
975 vmf.vmf_bx = 0;
976 if (vm86_intcall(APM_INT, &vmf)) {
977 printf("apm: 32-bit connection error.\n");
978 return (ENXIO);
979 }
980 sc->bios.seg.code32.base = (vmf.vmf_ax << 4) + APM_KERNBASE;
981 sc->bios.seg.code32.limit = 0xffff;
982 sc->bios.seg.code16.base = (vmf.vmf_cx << 4) + APM_KERNBASE;
983 sc->bios.seg.code16.limit = 0xffff;
984 sc->bios.seg.data.base = (vmf.vmf_dx << 4) + APM_KERNBASE;
985 sc->bios.seg.data.limit = 0xffff;
986 sc->bios.entry = vmf.vmf_ebx;
987 sc->connectmode = APM_PROT32CONNECT;
988 } else {
989 /* use 16-bit connection */
990 vmf.vmf_ah = APM_BIOS;
991 vmf.vmf_al = APM_PROT16CONNECT;
992 vmf.vmf_bx = 0;
993 if (vm86_intcall(APM_INT, &vmf)) {
994 printf("apm: 16-bit connection error.\n");
995 return (ENXIO);
996 }
997 sc->bios.seg.code16.base = (vmf.vmf_ax << 4) + APM_KERNBASE;
998 sc->bios.seg.code16.limit = 0xffff;
999 sc->bios.seg.data.base = (vmf.vmf_cx << 4) + APM_KERNBASE;
1000 sc->bios.seg.data.limit = 0xffff;
1001 sc->bios.entry = vmf.vmf_bx;
1002 sc->connectmode = APM_PROT16CONNECT;
1003 }
1004 #endif
1005 return(0);
1006 }
1007
1008
1009 /*
1010 * return 0 if the user will notice and handle the event,
1011 * return 1 if the kernel driver should do so.
1012 */
1013 static int
apm_record_event(struct apm_softc * sc,u_int event_type)1014 apm_record_event(struct apm_softc *sc, u_int event_type)
1015 {
1016 struct apm_event_info *evp;
1017
1018 if ((sc->sc_flags & SCFLAG_OPEN) == 0)
1019 return 1; /* no user waiting */
1020 if (sc->event_count == APM_NEVENTS)
1021 return 1; /* overflow */
1022 if (sc->event_filter[event_type] == 0)
1023 return 1; /* not registered */
1024 evp = &sc->event_list[sc->event_ptr];
1025 sc->event_count++;
1026 sc->event_ptr++;
1027 sc->event_ptr %= APM_NEVENTS;
1028 evp->type = event_type;
1029 evp->index = ++apm_evindex;
1030 selwakeuppri(&sc->sc_rsel, PZERO);
1031 return (sc->sc_flags & SCFLAG_OCTL) ? 0 : 1; /* user may handle */
1032 }
1033
1034 /* Power profile */
1035 static void
apm_power_profile(struct apm_softc * sc)1036 apm_power_profile(struct apm_softc *sc)
1037 {
1038 int state;
1039 struct apm_info info;
1040 static int apm_acline = 0;
1041
1042 if (apm_get_info(&info))
1043 return;
1044
1045 if (apm_acline != info.ai_acline) {
1046 apm_acline = info.ai_acline;
1047 state = apm_acline ? POWER_PROFILE_PERFORMANCE : POWER_PROFILE_ECONOMY;
1048 power_profile_set_state(state);
1049 }
1050 }
1051
1052 /* Process APM event */
1053 static void
apm_processevent(void)1054 apm_processevent(void)
1055 {
1056 int apm_event;
1057 struct apm_softc *sc = &apm_softc;
1058
1059 #define OPMEV_DEBUGMESSAGE(symbol) case symbol: \
1060 APM_DPRINT("Received APM Event: " #symbol "\n");
1061
1062 do {
1063 apm_event = apm_getevent();
1064 switch (apm_event) {
1065 OPMEV_DEBUGMESSAGE(PMEV_STANDBYREQ);
1066 if (apm_op_inprog == 0) {
1067 apm_op_inprog++;
1068 if (apm_record_event(sc, apm_event)) {
1069 apm_suspend(PMST_STANDBY);
1070 }
1071 }
1072 break;
1073 OPMEV_DEBUGMESSAGE(PMEV_USERSTANDBYREQ);
1074 if (apm_op_inprog == 0) {
1075 apm_op_inprog++;
1076 if (apm_record_event(sc, apm_event)) {
1077 apm_suspend(PMST_STANDBY);
1078 }
1079 }
1080 break;
1081 OPMEV_DEBUGMESSAGE(PMEV_SUSPENDREQ);
1082 apm_lastreq_notify();
1083 if (apm_op_inprog == 0) {
1084 apm_op_inprog++;
1085 if (apm_record_event(sc, apm_event)) {
1086 apm_do_suspend();
1087 }
1088 }
1089 return; /* XXX skip the rest */
1090 OPMEV_DEBUGMESSAGE(PMEV_USERSUSPENDREQ);
1091 apm_lastreq_notify();
1092 if (apm_op_inprog == 0) {
1093 apm_op_inprog++;
1094 if (apm_record_event(sc, apm_event)) {
1095 apm_do_suspend();
1096 }
1097 }
1098 return; /* XXX skip the rest */
1099 OPMEV_DEBUGMESSAGE(PMEV_CRITSUSPEND);
1100 apm_do_suspend();
1101 break;
1102 OPMEV_DEBUGMESSAGE(PMEV_NORMRESUME);
1103 apm_record_event(sc, apm_event);
1104 apm_resume();
1105 break;
1106 OPMEV_DEBUGMESSAGE(PMEV_CRITRESUME);
1107 apm_record_event(sc, apm_event);
1108 apm_resume();
1109 break;
1110 OPMEV_DEBUGMESSAGE(PMEV_STANDBYRESUME);
1111 apm_record_event(sc, apm_event);
1112 break;
1113 OPMEV_DEBUGMESSAGE(PMEV_BATTERYLOW);
1114 if (apm_record_event(sc, apm_event)) {
1115 apm_battery_low();
1116 apm_suspend(PMST_SUSPEND);
1117 }
1118 break;
1119 OPMEV_DEBUGMESSAGE(PMEV_POWERSTATECHANGE);
1120 apm_record_event(sc, apm_event);
1121 apm_power_profile(sc);
1122 break;
1123 OPMEV_DEBUGMESSAGE(PMEV_UPDATETIME);
1124 apm_record_event(sc, apm_event);
1125 inittodr(0); /* adjust time to RTC */
1126 break;
1127 OPMEV_DEBUGMESSAGE(PMEV_CAPABILITIESCHANGE);
1128 apm_record_event(sc, apm_event);
1129 apm_power_profile(sc);
1130 break;
1131 case PMEV_NOEVENT:
1132 break;
1133 default:
1134 printf("Unknown Original APM Event 0x%x\n", apm_event);
1135 break;
1136 }
1137 } while (apm_event != PMEV_NOEVENT);
1138 #ifdef PC98
1139 apm_disable_smm(sc);
1140 #endif
1141 }
1142
1143 /*
1144 * Attach APM:
1145 *
1146 * Initialize APM driver
1147 */
1148
1149 static int
apm_attach(device_t dev)1150 apm_attach(device_t dev)
1151 {
1152 struct apm_softc *sc = &apm_softc;
1153 int drv_version;
1154 #ifdef PC98
1155 int rid;
1156 #endif
1157 mtx_init(&sc->mtx, device_get_nameunit(dev), "apm", MTX_DEF);
1158 cv_init(&sc->cv, "cbb cv");
1159
1160 #ifndef PC98
1161 if (device_get_flags(dev) & 0x20)
1162 atrtcclock_disable = 1;
1163 #endif
1164
1165 sc->initialized = 0;
1166
1167 /* Must be externally enabled */
1168 sc->active = 0;
1169
1170 /* Always call HLT in idle loop */
1171 sc->always_halt_cpu = 1;
1172
1173 getenv_int("debug.apm_debug", &apm_debug);
1174
1175 /* print bootstrap messages */
1176 APM_DPRINT("apm: APM BIOS version %04lx\n", apm_version);
1177 APM_DPRINT("apm: Code16 0x%08x, Data 0x%08x\n",
1178 sc->bios.seg.code16.base, sc->bios.seg.data.base);
1179 APM_DPRINT("apm: Code entry 0x%08x, Idling CPU %s, Management %s\n",
1180 sc->bios.entry, is_enabled(sc->slow_idle_cpu),
1181 is_enabled(!sc->disabled));
1182 APM_DPRINT("apm: CS_limit=0x%x, DS_limit=0x%x\n",
1183 sc->bios.seg.code16.limit, sc->bios.seg.data.limit);
1184
1185 #ifdef PC98
1186 rid = 0;
1187 sc->sc_res = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid,
1188 APM_NECSMM_PORT, ~0, APM_NECSMM_PORTSZ, RF_ACTIVE);
1189 if (sc->sc_res == NULL)
1190 panic("%s: counldn't map I/O ports", device_get_name(dev));
1191 sc->sc_iot = rman_get_bustag(sc->sc_res);
1192 sc->sc_ioh = rman_get_bushandle(sc->sc_res);
1193
1194 if (apm_version==0x112 || apm_version==0x111 || apm_version==0x110)
1195 apm_necsmm_addr = APM_NECSMM_PORT;
1196 else
1197 apm_necsmm_addr = 0;
1198 apm_necsmm_mask = ~APM_NECSMM_EN;
1199 #endif /* PC98 */
1200
1201 /*
1202 * In one test, apm bios version was 1.02; an attempt to register
1203 * a 1.04 driver resulted in a 1.00 connection! Registering a
1204 * 1.02 driver resulted in a 1.02 connection.
1205 */
1206 drv_version = apm_version > 0x102 ? 0x102 : apm_version;
1207 for (; drv_version > 0x100; drv_version--)
1208 if (apm_driver_version(drv_version) == 0)
1209 break;
1210 sc->minorversion = ((drv_version & 0x00f0) >> 4) * 10 +
1211 ((drv_version & 0x000f) >> 0);
1212 sc->majorversion = ((drv_version & 0xf000) >> 12) * 10 +
1213 ((apm_version & 0x0f00) >> 8);
1214
1215 sc->intversion = INTVERSION(sc->majorversion, sc->minorversion);
1216
1217 if (sc->intversion >= INTVERSION(1, 1))
1218 APM_DPRINT("apm: Engaged control %s\n", is_enabled(!sc->disengaged));
1219 device_printf(dev, "found APM BIOS v%ld.%ld, connected at v%d.%d\n",
1220 ((apm_version & 0xf000) >> 12) * 10 + ((apm_version & 0x0f00) >> 8),
1221 ((apm_version & 0x00f0) >> 4) * 10 + ((apm_version & 0x000f) >> 0),
1222 sc->majorversion, sc->minorversion);
1223
1224
1225 APM_DPRINT("apm: Slow Idling CPU %s\n", is_enabled(sc->slow_idle_cpu));
1226 /* enable power management */
1227 if (sc->disabled) {
1228 if (apm_enable_disable_pm(1)) {
1229 APM_DPRINT("apm: *Warning* enable function failed! [%x]\n",
1230 (sc->bios.r.eax >> 8) & 0xff);
1231 }
1232 }
1233
1234 /* engage power managment (APM 1.1 or later) */
1235 if (sc->intversion >= INTVERSION(1, 1) && sc->disengaged) {
1236 if (apm_engage_disengage_pm(1)) {
1237 APM_DPRINT("apm: *Warning* engage function failed err=[%x]",
1238 (sc->bios.r.eax >> 8) & 0xff);
1239 APM_DPRINT(" (Docked or using external power?).\n");
1240 }
1241 }
1242
1243 /* Power the system off using APM */
1244 EVENTHANDLER_REGISTER(shutdown_final, apm_power_off, NULL,
1245 SHUTDOWN_PRI_LAST);
1246
1247 /* Register APM again to pass the correct argument of pm_func. */
1248 power_pm_register(POWER_PM_TYPE_APM, apm_pm_func, sc);
1249
1250 sc->initialized = 1;
1251 sc->suspending = 0;
1252 sc->running = 0;
1253
1254 make_dev(&apm_cdevsw, APMDEV_NORMAL,
1255 UID_ROOT, GID_OPERATOR, 0664, "apm");
1256 make_dev(&apm_cdevsw, APMDEV_CTL,
1257 UID_ROOT, GID_OPERATOR, 0660, "apmctl");
1258 return 0;
1259 }
1260
1261 static int
apmopen(struct cdev * dev,int flag,int fmt,struct thread * td)1262 apmopen(struct cdev *dev, int flag, int fmt, struct thread *td)
1263 {
1264 struct apm_softc *sc = &apm_softc;
1265
1266 if (sc == NULL || sc->initialized == 0)
1267 return (ENXIO);
1268
1269 switch (dev2unit(dev)) {
1270 case APMDEV_CTL:
1271 if (!(flag & FWRITE))
1272 return EINVAL;
1273 if (sc->sc_flags & SCFLAG_OCTL)
1274 return EBUSY;
1275 sc->sc_flags |= SCFLAG_OCTL;
1276 bzero(sc->event_filter, sizeof sc->event_filter);
1277 break;
1278 case APMDEV_NORMAL:
1279 sc->sc_flags |= SCFLAG_ONORMAL;
1280 break;
1281 }
1282 return 0;
1283 }
1284
1285 static int
apmclose(struct cdev * dev,int flag,int fmt,struct thread * td)1286 apmclose(struct cdev *dev, int flag, int fmt, struct thread *td)
1287 {
1288 struct apm_softc *sc = &apm_softc;
1289
1290 switch (dev2unit(dev)) {
1291 case APMDEV_CTL:
1292 apm_lastreq_rejected();
1293 sc->sc_flags &= ~SCFLAG_OCTL;
1294 bzero(sc->event_filter, sizeof sc->event_filter);
1295 break;
1296 case APMDEV_NORMAL:
1297 sc->sc_flags &= ~SCFLAG_ONORMAL;
1298 break;
1299 }
1300 if ((sc->sc_flags & SCFLAG_OPEN) == 0) {
1301 sc->event_count = 0;
1302 sc->event_ptr = 0;
1303 }
1304 return 0;
1305 }
1306
1307 static int
apmioctl(struct cdev * dev,u_long cmd,caddr_t addr,int flag,struct thread * td)1308 apmioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flag, struct thread *td)
1309 {
1310 struct apm_softc *sc = &apm_softc;
1311 struct apm_bios_arg *args;
1312 int error = 0;
1313 int ret;
1314 int newstate;
1315
1316 if (sc == NULL || sc->initialized == 0)
1317 return (ENXIO);
1318
1319 APM_DPRINT("APM ioctl: cmd = 0x%lx\n", cmd);
1320 switch (cmd) {
1321 case APMIO_SUSPEND:
1322 if (!(flag & FWRITE))
1323 return (EPERM);
1324 if (sc->active)
1325 apm_suspend(PMST_SUSPEND);
1326 else
1327 error = EINVAL;
1328 break;
1329
1330 case APMIO_STANDBY:
1331 if (!(flag & FWRITE))
1332 return (EPERM);
1333 if (sc->active)
1334 apm_suspend(PMST_STANDBY);
1335 else
1336 error = EINVAL;
1337 break;
1338
1339 case APMIO_GETINFO_OLD:
1340 {
1341 struct apm_info info;
1342 apm_info_old_t aiop;
1343
1344 if (apm_get_info(&info))
1345 error = ENXIO;
1346 aiop = (apm_info_old_t)addr;
1347 aiop->ai_major = info.ai_major;
1348 aiop->ai_minor = info.ai_minor;
1349 aiop->ai_acline = info.ai_acline;
1350 aiop->ai_batt_stat = info.ai_batt_stat;
1351 aiop->ai_batt_life = info.ai_batt_life;
1352 aiop->ai_status = info.ai_status;
1353 }
1354 break;
1355 case APMIO_GETINFO:
1356 if (apm_get_info((apm_info_t)addr))
1357 error = ENXIO;
1358 break;
1359 case APMIO_GETPWSTATUS:
1360 if (apm_get_pwstatus((apm_pwstatus_t)addr))
1361 error = ENXIO;
1362 break;
1363 case APMIO_ENABLE:
1364 if (!(flag & FWRITE))
1365 return (EPERM);
1366 apm_event_enable();
1367 break;
1368 case APMIO_DISABLE:
1369 if (!(flag & FWRITE))
1370 return (EPERM);
1371 apm_event_disable();
1372 break;
1373 case APMIO_HALTCPU:
1374 if (!(flag & FWRITE))
1375 return (EPERM);
1376 apm_halt_cpu();
1377 break;
1378 case APMIO_NOTHALTCPU:
1379 if (!(flag & FWRITE))
1380 return (EPERM);
1381 apm_not_halt_cpu();
1382 break;
1383 case APMIO_DISPLAY:
1384 if (!(flag & FWRITE))
1385 return (EPERM);
1386 newstate = *(int *)addr;
1387 if (apm_display(newstate))
1388 error = ENXIO;
1389 break;
1390 case APMIO_BIOS:
1391 if (!(flag & FWRITE))
1392 return (EPERM);
1393 /* XXX compatibility with the old interface */
1394 args = (struct apm_bios_arg *)addr;
1395 #ifdef PC98
1396 if (((args->eax >> 8) & 0xff) == 0x53) {
1397 sc->bios.r.eax = args->eax & ~0xffff;
1398 sc->bios.r.eax |= APM_BIOS << 8;
1399 switch (args->eax & 0xff) {
1400 case 0x0a:
1401 sc->bios.r.eax |= APM_GETPWSTATUS;
1402 break;
1403 case 0x0e:
1404 sc->bios.r.eax |= APM_DRVVERSION;
1405 break;
1406 default:
1407 sc->bios.r.eax |= args->eax & 0xff;
1408 break;
1409 }
1410 } else
1411 #endif
1412 sc->bios.r.eax = args->eax;
1413 sc->bios.r.ebx = args->ebx;
1414 sc->bios.r.ecx = args->ecx;
1415 sc->bios.r.edx = args->edx;
1416 sc->bios.r.esi = args->esi;
1417 sc->bios.r.edi = args->edi;
1418 if ((ret = apm_bioscall())) {
1419 /*
1420 * Return code 1 means bios call was unsuccessful.
1421 * Error code is stored in %ah.
1422 * Return code -1 means bios call was unsupported
1423 * in the APM BIOS version.
1424 */
1425 if (ret == -1) {
1426 error = EINVAL;
1427 }
1428 } else {
1429 /*
1430 * Return code 0 means bios call was successful.
1431 * We need only %al and can discard %ah.
1432 */
1433 sc->bios.r.eax &= 0xff;
1434 }
1435 args->eax = sc->bios.r.eax;
1436 args->ebx = sc->bios.r.ebx;
1437 args->ecx = sc->bios.r.ecx;
1438 args->edx = sc->bios.r.edx;
1439 args->esi = sc->bios.r.esi;
1440 args->edi = sc->bios.r.edi;
1441 break;
1442 default:
1443 error = EINVAL;
1444 break;
1445 }
1446
1447 /* for /dev/apmctl */
1448 if (dev2unit(dev) == APMDEV_CTL) {
1449 struct apm_event_info *evp;
1450 int i;
1451
1452 error = 0;
1453 switch (cmd) {
1454 case APMIO_NEXTEVENT:
1455 if (!sc->event_count) {
1456 error = EAGAIN;
1457 } else {
1458 evp = (struct apm_event_info *)addr;
1459 i = sc->event_ptr + APM_NEVENTS - sc->event_count;
1460 i %= APM_NEVENTS;
1461 *evp = sc->event_list[i];
1462 sc->event_count--;
1463 }
1464 break;
1465 case APMIO_REJECTLASTREQ:
1466 if (apm_lastreq_rejected()) {
1467 error = EINVAL;
1468 }
1469 break;
1470 default:
1471 error = EINVAL;
1472 break;
1473 }
1474 }
1475
1476 return error;
1477 }
1478
1479 static int
apmwrite(struct cdev * dev,struct uio * uio,int ioflag)1480 apmwrite(struct cdev *dev, struct uio *uio, int ioflag)
1481 {
1482 struct apm_softc *sc = &apm_softc;
1483 u_int event_type;
1484 int error;
1485 u_char enabled;
1486
1487 if (dev2unit(dev) != APMDEV_CTL)
1488 return(ENODEV);
1489 if (uio->uio_resid != sizeof(u_int))
1490 return(E2BIG);
1491
1492 if ((error = uiomove((caddr_t)&event_type, sizeof(u_int), uio)))
1493 return(error);
1494
1495 if (event_type < 0 || event_type >= APM_NPMEV)
1496 return(EINVAL);
1497
1498 if (sc->event_filter[event_type] == 0) {
1499 enabled = 1;
1500 } else {
1501 enabled = 0;
1502 }
1503 sc->event_filter[event_type] = enabled;
1504 APM_DPRINT("apmwrite: event 0x%x %s\n", event_type, is_enabled(enabled));
1505
1506 return uio->uio_resid;
1507 }
1508
1509 static int
apmpoll(struct cdev * dev,int events,struct thread * td)1510 apmpoll(struct cdev *dev, int events, struct thread *td)
1511 {
1512 struct apm_softc *sc = &apm_softc;
1513 int revents = 0;
1514
1515 if (events & (POLLIN | POLLRDNORM)) {
1516 if (sc->event_count) {
1517 revents |= events & (POLLIN | POLLRDNORM);
1518 } else {
1519 selrecord(td, &sc->sc_rsel);
1520 }
1521 }
1522
1523 return (revents);
1524 }
1525
1526 static device_method_t apm_methods[] = {
1527 /* Device interface */
1528 DEVMETHOD(device_identify, apm_identify),
1529 DEVMETHOD(device_probe, apm_probe),
1530 DEVMETHOD(device_attach, apm_attach),
1531
1532 { 0, 0 }
1533 };
1534
1535 static driver_t apm_driver = {
1536 "apm",
1537 apm_methods,
1538 1, /* no softc (XXX) */
1539 };
1540
1541 static devclass_t apm_devclass;
1542
1543 DRIVER_MODULE(apm, legacy, apm_driver, apm_devclass, apm_modevent, 0);
1544 MODULE_VERSION(apm, 1);
1545
1546 static int
apm_pm_func(u_long cmd,void * arg,...)1547 apm_pm_func(u_long cmd, void *arg, ...)
1548 {
1549 int state, apm_state;
1550 int error;
1551 va_list ap;
1552
1553 error = 0;
1554 switch (cmd) {
1555 case POWER_CMD_SUSPEND:
1556 va_start(ap, arg);
1557 state = va_arg(ap, int);
1558 va_end(ap);
1559
1560 switch (state) {
1561 case POWER_SLEEP_STATE_STANDBY:
1562 apm_state = PMST_STANDBY;
1563 break;
1564 case POWER_SLEEP_STATE_SUSPEND:
1565 case POWER_SLEEP_STATE_HIBERNATE:
1566 apm_state = PMST_SUSPEND;
1567 break;
1568 default:
1569 error = EINVAL;
1570 goto out;
1571 }
1572
1573 apm_suspend(apm_state);
1574 break;
1575
1576 default:
1577 error = EINVAL;
1578 goto out;
1579 }
1580
1581 out:
1582 return (error);
1583 }
1584
1585 static void
apm_pm_register(void * arg)1586 apm_pm_register(void *arg)
1587 {
1588
1589 if (!resource_disabled("apm", 0))
1590 power_pm_register(POWER_PM_TYPE_APM, apm_pm_func, NULL);
1591 }
1592
1593 SYSINIT(power, SI_SUB_KLD, SI_ORDER_ANY, apm_pm_register, 0);
1594