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204#include <linux/module.h>
205
206#include <linux/poll.h>
207#include <linux/smp_lock.h>
208#include <linux/types.h>
209#include <linux/stddef.h>
210#include <linux/timer.h>
211#include <linux/fcntl.h>
212#include <linux/slab.h>
213#include <linux/stat.h>
214#include <linux/proc_fs.h>
215#include <linux/seq_file.h>
216#include <linux/miscdevice.h>
217#include <linux/apm_bios.h>
218#include <linux/init.h>
219#include <linux/time.h>
220#include <linux/sched.h>
221#include <linux/pm.h>
222#include <linux/capability.h>
223#include <linux/device.h>
224#include <linux/kernel.h>
225#include <linux/freezer.h>
226#include <linux/smp.h>
227#include <linux/dmi.h>
228#include <linux/suspend.h>
229#include <linux/kthread.h>
230#include <linux/jiffies.h>
231
232#include <asm/system.h>
233#include <asm/uaccess.h>
234#include <asm/desc.h>
235#include <asm/i8253.h>
236#include <asm/olpc.h>
237#include <asm/paravirt.h>
238#include <asm/reboot.h>
239
240#if defined(CONFIG_APM_DISPLAY_BLANK) && defined(CONFIG_VT)
241extern int (*console_blank_hook)(int);
242#endif
243
244
245
246
247
248#define APM_MINOR_DEV 134
249
250
251
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293
294
295#define ALWAYS_CALL_BUSY 1
296
297
298
299
300
301
302#define APM_ZERO_SEGS
303
304#include <asm/apm.h>
305
306
307
308
309
310
311#undef INIT_TIMER_AFTER_SUSPEND
312
313#ifdef INIT_TIMER_AFTER_SUSPEND
314#include <linux/timex.h>
315#include <asm/io.h>
316#include <linux/delay.h>
317#endif
318
319
320
321
322#define APM_CHECK_TIMEOUT (HZ)
323
324
325
326
327#define DEFAULT_BOUNCE_INTERVAL (3 * HZ)
328
329
330
331
332#define APM_MAX_EVENTS 20
333
334
335
336
337struct apm_user {
338 int magic;
339 struct apm_user *next;
340 unsigned int suser: 1;
341 unsigned int writer: 1;
342 unsigned int reader: 1;
343 unsigned int suspend_wait: 1;
344 int suspend_result;
345 int suspends_pending;
346 int standbys_pending;
347 int suspends_read;
348 int standbys_read;
349 int event_head;
350 int event_tail;
351 apm_event_t events[APM_MAX_EVENTS];
352};
353
354
355
356
357#define APM_BIOS_MAGIC 0x4101
358
359
360
361
362#ifdef CONFIG_APM_CPU_IDLE
363#define DEFAULT_IDLE_THRESHOLD 95
364#else
365#define DEFAULT_IDLE_THRESHOLD 100
366#endif
367#define DEFAULT_IDLE_PERIOD (100 / 3)
368
369
370
371
372static struct {
373 unsigned long offset;
374 unsigned short segment;
375} apm_bios_entry;
376static int clock_slowed;
377static int idle_threshold __read_mostly = DEFAULT_IDLE_THRESHOLD;
378static int idle_period __read_mostly = DEFAULT_IDLE_PERIOD;
379static int set_pm_idle;
380static int suspends_pending;
381static int standbys_pending;
382static int ignore_sys_suspend;
383static int ignore_normal_resume;
384static int bounce_interval __read_mostly = DEFAULT_BOUNCE_INTERVAL;
385
386static int debug __read_mostly;
387static int smp __read_mostly;
388static int apm_disabled = -1;
389#ifdef CONFIG_SMP
390static int power_off;
391#else
392static int power_off = 1;
393#endif
394static int realmode_power_off;
395#ifdef CONFIG_APM_ALLOW_INTS
396static int allow_ints = 1;
397#else
398static int allow_ints;
399#endif
400static int broken_psr;
401
402static DECLARE_WAIT_QUEUE_HEAD(apm_waitqueue);
403static DECLARE_WAIT_QUEUE_HEAD(apm_suspend_waitqueue);
404static struct apm_user *user_list;
405static DEFINE_SPINLOCK(user_list_lock);
406
407
408
409
410
411
412
413static struct desc_struct bad_bios_desc = GDT_ENTRY_INIT(0x4092,
414 (unsigned long)__va(0x400UL), PAGE_SIZE - 0x400 - 1);
415
416static const char driver_version[] = "1.16ac";
417
418static struct task_struct *kapmd_task;
419
420
421
422
423
424static const char * const apm_event_name[] = {
425 "system standby",
426 "system suspend",
427 "normal resume",
428 "critical resume",
429 "low battery",
430 "power status change",
431 "update time",
432 "critical suspend",
433 "user standby",
434 "user suspend",
435 "system standby resume",
436 "capabilities change"
437};
438#define NR_APM_EVENT_NAME ARRAY_SIZE(apm_event_name)
439
440typedef struct lookup_t {
441 int key;
442 char *msg;
443} lookup_t;
444
445
446
447
448
449
450static const lookup_t error_table[] = {
451
452 { APM_DISABLED, "Power management disabled" },
453 { APM_CONNECTED, "Real mode interface already connected" },
454 { APM_NOT_CONNECTED, "Interface not connected" },
455 { APM_16_CONNECTED, "16 bit interface already connected" },
456
457 { APM_32_CONNECTED, "32 bit interface already connected" },
458 { APM_32_UNSUPPORTED, "32 bit interface not supported" },
459 { APM_BAD_DEVICE, "Unrecognized device ID" },
460 { APM_BAD_PARAM, "Parameter out of range" },
461 { APM_NOT_ENGAGED, "Interface not engaged" },
462 { APM_BAD_FUNCTION, "Function not supported" },
463 { APM_RESUME_DISABLED, "Resume timer disabled" },
464 { APM_BAD_STATE, "Unable to enter requested state" },
465
466 { APM_NO_ERROR, "BIOS did not set a return code" },
467 { APM_NOT_PRESENT, "No APM present" }
468};
469#define ERROR_COUNT ARRAY_SIZE(error_table)
470
471
472
473
474
475
476
477
478
479
480static void apm_error(char *str, int err)
481{
482 int i;
483
484 for (i = 0; i < ERROR_COUNT; i++)
485 if (error_table[i].key == err)
486 break;
487 if (i < ERROR_COUNT)
488 printk(KERN_NOTICE "apm: %s: %s\n", str, error_table[i].msg);
489 else if (err < 0)
490 printk(KERN_NOTICE "apm: %s: linux error code %i\n", str, err);
491 else
492 printk(KERN_NOTICE "apm: %s: unknown error code %#2.2x\n",
493 str, err);
494}
495
496
497
498
499
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509
510
511
512
513static inline unsigned long __apm_irq_save(void)
514{
515 unsigned long flags;
516 local_save_flags(flags);
517 if (apm_info.allow_ints) {
518 if (irqs_disabled_flags(flags))
519 local_irq_enable();
520 } else
521 local_irq_disable();
522
523 return flags;
524}
525
526#define apm_irq_save(flags) \
527 do { flags = __apm_irq_save(); } while (0)
528
529static inline void apm_irq_restore(unsigned long flags)
530{
531 if (irqs_disabled_flags(flags))
532 local_irq_disable();
533 else if (irqs_disabled())
534 local_irq_enable();
535}
536
537#ifdef APM_ZERO_SEGS
538# define APM_DECL_SEGS \
539 unsigned int saved_fs; unsigned int saved_gs;
540# define APM_DO_SAVE_SEGS \
541 savesegment(fs, saved_fs); savesegment(gs, saved_gs)
542# define APM_DO_RESTORE_SEGS \
543 loadsegment(fs, saved_fs); loadsegment(gs, saved_gs)
544#else
545# define APM_DECL_SEGS
546# define APM_DO_SAVE_SEGS
547# define APM_DO_RESTORE_SEGS
548#endif
549
550struct apm_bios_call {
551 u32 func;
552
553 u32 ebx;
554 u32 ecx;
555
556 u32 eax;
557 u32 edx;
558 u32 esi;
559
560
561 int err;
562};
563
564
565
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577
578static long __apm_bios_call(void *_call)
579{
580 APM_DECL_SEGS
581 unsigned long flags;
582 int cpu;
583 struct desc_struct save_desc_40;
584 struct desc_struct *gdt;
585 struct apm_bios_call *call = _call;
586
587 cpu = get_cpu();
588 BUG_ON(cpu != 0);
589 gdt = get_cpu_gdt_table(cpu);
590 save_desc_40 = gdt[0x40 / 8];
591 gdt[0x40 / 8] = bad_bios_desc;
592
593 apm_irq_save(flags);
594 APM_DO_SAVE_SEGS;
595 apm_bios_call_asm(call->func, call->ebx, call->ecx,
596 &call->eax, &call->ebx, &call->ecx, &call->edx,
597 &call->esi);
598 APM_DO_RESTORE_SEGS;
599 apm_irq_restore(flags);
600 gdt[0x40 / 8] = save_desc_40;
601 put_cpu();
602
603 return call->eax & 0xff;
604}
605
606
607static int on_cpu0(long (*fn)(void *), struct apm_bios_call *call)
608{
609 int ret;
610
611
612
613 if (get_cpu() == 0) {
614 ret = fn(call);
615 put_cpu();
616 } else {
617 put_cpu();
618 ret = work_on_cpu(0, fn, call);
619 }
620
621
622 if (ret < 0)
623 call->err = ret;
624 else
625 call->err = (call->eax >> 8) & 0xff;
626
627 return ret;
628}
629
630
631
632
633
634
635
636static int apm_bios_call(struct apm_bios_call *call)
637{
638 return on_cpu0(__apm_bios_call, call);
639}
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641
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644
645
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650
651
652
653static long __apm_bios_call_simple(void *_call)
654{
655 u8 error;
656 APM_DECL_SEGS
657 unsigned long flags;
658 int cpu;
659 struct desc_struct save_desc_40;
660 struct desc_struct *gdt;
661 struct apm_bios_call *call = _call;
662
663 cpu = get_cpu();
664 BUG_ON(cpu != 0);
665 gdt = get_cpu_gdt_table(cpu);
666 save_desc_40 = gdt[0x40 / 8];
667 gdt[0x40 / 8] = bad_bios_desc;
668
669 apm_irq_save(flags);
670 APM_DO_SAVE_SEGS;
671 error = apm_bios_call_simple_asm(call->func, call->ebx, call->ecx,
672 &call->eax);
673 APM_DO_RESTORE_SEGS;
674 apm_irq_restore(flags);
675 gdt[0x40 / 8] = save_desc_40;
676 put_cpu();
677 return error;
678}
679
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693
694static int apm_bios_call_simple(u32 func, u32 ebx_in, u32 ecx_in, u32 *eax,
695 int *err)
696{
697 struct apm_bios_call call;
698 int ret;
699
700 call.func = func;
701 call.ebx = ebx_in;
702 call.ecx = ecx_in;
703
704 ret = on_cpu0(__apm_bios_call_simple, &call);
705 *eax = call.eax;
706 *err = call.err;
707 return ret;
708}
709
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724
725
726static int apm_driver_version(u_short *val)
727{
728 u32 eax;
729 int err;
730
731 if (apm_bios_call_simple(APM_FUNC_VERSION, 0, *val, &eax, &err))
732 return err;
733 *val = eax;
734 return APM_SUCCESS;
735}
736
737
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753static int apm_get_event(apm_event_t *event, apm_eventinfo_t *info)
754{
755 struct apm_bios_call call;
756
757 call.func = APM_FUNC_GET_EVENT;
758 call.ebx = call.ecx = 0;
759
760 if (apm_bios_call(&call))
761 return call.err;
762
763 *event = call.ebx;
764 if (apm_info.connection_version < 0x0102)
765 *info = ~0;
766 else
767 *info = call.ecx;
768 return APM_SUCCESS;
769}
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784
785static int set_power_state(u_short what, u_short state)
786{
787 u32 eax;
788 int err;
789
790 if (apm_bios_call_simple(APM_FUNC_SET_STATE, what, state, &eax, &err))
791 return err;
792 return APM_SUCCESS;
793}
794
795
796
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799
800
801
802static int set_system_power_state(u_short state)
803{
804 return set_power_state(APM_DEVICE_ALL, state);
805}
806
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811
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814
815
816static int apm_do_idle(void)
817{
818 u32 eax;
819 u8 ret = 0;
820 int idled = 0;
821 int polling;
822 int err = 0;
823
824 polling = !!(current_thread_info()->status & TS_POLLING);
825 if (polling) {
826 current_thread_info()->status &= ~TS_POLLING;
827
828
829
830
831 smp_mb();
832 }
833 if (!need_resched()) {
834 idled = 1;
835 ret = apm_bios_call_simple(APM_FUNC_IDLE, 0, 0, &eax, &err);
836 }
837 if (polling)
838 current_thread_info()->status |= TS_POLLING;
839
840 if (!idled)
841 return 0;
842
843 if (ret) {
844 static unsigned long t;
845
846
847
848
849 if (++t < 5) {
850 printk(KERN_DEBUG "apm_do_idle failed (%d)\n", err);
851 t = jiffies;
852 }
853 return -1;
854 }
855 clock_slowed = (apm_info.bios.flags & APM_IDLE_SLOWS_CLOCK) != 0;
856 return clock_slowed;
857}
858
859
860
861
862
863
864
865static void apm_do_busy(void)
866{
867 u32 dummy;
868 int err;
869
870 if (clock_slowed || ALWAYS_CALL_BUSY) {
871 (void)apm_bios_call_simple(APM_FUNC_BUSY, 0, 0, &dummy, &err);
872 clock_slowed = 0;
873 }
874}
875
876
877
878
879
880
881
882#define IDLE_CALC_LIMIT (HZ * 100)
883#define IDLE_LEAKY_MAX 16
884
885static void (*original_pm_idle)(void) __read_mostly;
886
887
888
889
890
891
892
893
894
895static void apm_cpu_idle(void)
896{
897 static int use_apm_idle;
898 static unsigned int last_jiffies;
899 static unsigned int last_stime;
900
901 int apm_idle_done = 0;
902 unsigned int jiffies_since_last_check = jiffies - last_jiffies;
903 unsigned int bucket;
904
905recalc:
906 if (jiffies_since_last_check > IDLE_CALC_LIMIT) {
907 use_apm_idle = 0;
908 last_jiffies = jiffies;
909 last_stime = current->stime;
910 } else if (jiffies_since_last_check > idle_period) {
911 unsigned int idle_percentage;
912
913 idle_percentage = current->stime - last_stime;
914 idle_percentage *= 100;
915 idle_percentage /= jiffies_since_last_check;
916 use_apm_idle = (idle_percentage > idle_threshold);
917 if (apm_info.forbid_idle)
918 use_apm_idle = 0;
919 last_jiffies = jiffies;
920 last_stime = current->stime;
921 }
922
923 bucket = IDLE_LEAKY_MAX;
924
925 while (!need_resched()) {
926 if (use_apm_idle) {
927 unsigned int t;
928
929 t = jiffies;
930 switch (apm_do_idle()) {
931 case 0:
932 apm_idle_done = 1;
933 if (t != jiffies) {
934 if (bucket) {
935 bucket = IDLE_LEAKY_MAX;
936 continue;
937 }
938 } else if (bucket) {
939 bucket--;
940 continue;
941 }
942 break;
943 case 1:
944 apm_idle_done = 1;
945 break;
946 default:
947 break;
948 }
949 }
950 if (original_pm_idle)
951 original_pm_idle();
952 else
953 default_idle();
954 local_irq_disable();
955 jiffies_since_last_check = jiffies - last_jiffies;
956 if (jiffies_since_last_check > idle_period)
957 goto recalc;
958 }
959
960 if (apm_idle_done)
961 apm_do_busy();
962
963 local_irq_enable();
964}
965
966
967
968
969
970
971
972
973
974
975
976static void apm_power_off(void)
977{
978 unsigned char po_bios_call[] = {
979 0xb8, 0x00, 0x10,
980 0x8e, 0xd0,
981 0xbc, 0x00, 0xf0,
982 0xb8, 0x07, 0x53,
983 0xbb, 0x01, 0x00,
984 0xb9, 0x03, 0x00,
985 0xcd, 0x15
986 };
987
988
989 if (apm_info.realmode_power_off) {
990 set_cpus_allowed_ptr(current, cpumask_of(0));
991 machine_real_restart(po_bios_call, sizeof(po_bios_call));
992 } else {
993 (void)set_system_power_state(APM_STATE_OFF);
994 }
995}
996
997#ifdef CONFIG_APM_DO_ENABLE
998
999
1000
1001
1002
1003
1004
1005
1006static int apm_enable_power_management(int enable)
1007{
1008 u32 eax;
1009 int err;
1010
1011 if ((enable == 0) && (apm_info.bios.flags & APM_BIOS_DISENGAGED))
1012 return APM_NOT_ENGAGED;
1013 if (apm_bios_call_simple(APM_FUNC_ENABLE_PM, APM_DEVICE_BALL,
1014 enable, &eax, &err))
1015 return err;
1016 if (enable)
1017 apm_info.bios.flags &= ~APM_BIOS_DISABLED;
1018 else
1019 apm_info.bios.flags |= APM_BIOS_DISABLED;
1020 return APM_SUCCESS;
1021}
1022#endif
1023
1024
1025
1026
1027
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1030
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1034
1035
1036
1037
1038static int apm_get_power_status(u_short *status, u_short *bat, u_short *life)
1039{
1040 struct apm_bios_call call;
1041
1042 call.func = APM_FUNC_GET_STATUS;
1043 call.ebx = APM_DEVICE_ALL;
1044 call.ecx = 0;
1045
1046 if (apm_info.get_power_status_broken)
1047 return APM_32_UNSUPPORTED;
1048 if (apm_bios_call(&call))
1049 return call.err;
1050 *status = call.ebx;
1051 *bat = call.ecx;
1052 if (apm_info.get_power_status_swabinminutes) {
1053 *life = swab16((u16)call.edx);
1054 *life |= 0x8000;
1055 } else
1056 *life = call.edx;
1057 return APM_SUCCESS;
1058}
1059
1060#if 0
1061static int apm_get_battery_status(u_short which, u_short *status,
1062 u_short *bat, u_short *life, u_short *nbat)
1063{
1064 u32 eax;
1065 u32 ebx;
1066 u32 ecx;
1067 u32 edx;
1068 u32 esi;
1069
1070 if (apm_info.connection_version < 0x0102) {
1071
1072 if (which != 1)
1073 return APM_BAD_DEVICE;
1074 *nbat = 1;
1075 return apm_get_power_status(status, bat, life);
1076 }
1077
1078 if (apm_bios_call(APM_FUNC_GET_STATUS, (0x8000 | (which)), 0, &eax,
1079 &ebx, &ecx, &edx, &esi))
1080 return (eax >> 8) & 0xff;
1081 *status = ebx;
1082 *bat = ecx;
1083 *life = edx;
1084 *nbat = esi;
1085 return APM_SUCCESS;
1086}
1087#endif
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098static int apm_engage_power_management(u_short device, int enable)
1099{
1100 u32 eax;
1101 int err;
1102
1103 if ((enable == 0) && (device == APM_DEVICE_ALL)
1104 && (apm_info.bios.flags & APM_BIOS_DISABLED))
1105 return APM_DISABLED;
1106 if (apm_bios_call_simple(APM_FUNC_ENGAGE_PM, device, enable,
1107 &eax, &err))
1108 return err;
1109 if (device == APM_DEVICE_ALL) {
1110 if (enable)
1111 apm_info.bios.flags &= ~APM_BIOS_DISENGAGED;
1112 else
1113 apm_info.bios.flags |= APM_BIOS_DISENGAGED;
1114 }
1115 return APM_SUCCESS;
1116}
1117
1118#if defined(CONFIG_APM_DISPLAY_BLANK) && defined(CONFIG_VT)
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130static int apm_console_blank(int blank)
1131{
1132 int error = APM_NOT_ENGAGED;
1133 int i;
1134 u_short state;
1135 static const u_short dev[3] = { 0x100, 0x1FF, 0x101 };
1136
1137 state = blank ? APM_STATE_STANDBY : APM_STATE_READY;
1138
1139 for (i = 0; i < ARRAY_SIZE(dev); i++) {
1140 error = set_power_state(dev[i], state);
1141
1142 if ((error == APM_SUCCESS) || (error == APM_NO_ERROR))
1143 return 1;
1144
1145 if (error == APM_NOT_ENGAGED)
1146 break;
1147 }
1148
1149 if (error == APM_NOT_ENGAGED) {
1150 static int tried;
1151 int eng_error;
1152 if (tried++ == 0) {
1153 eng_error = apm_engage_power_management(APM_DEVICE_ALL, 1);
1154 if (eng_error) {
1155 apm_error("set display", error);
1156 apm_error("engage interface", eng_error);
1157 return 0;
1158 } else
1159 return apm_console_blank(blank);
1160 }
1161 }
1162 apm_error("set display", error);
1163 return 0;
1164}
1165#endif
1166
1167static int queue_empty(struct apm_user *as)
1168{
1169 return as->event_head == as->event_tail;
1170}
1171
1172static apm_event_t get_queued_event(struct apm_user *as)
1173{
1174 if (++as->event_tail >= APM_MAX_EVENTS)
1175 as->event_tail = 0;
1176 return as->events[as->event_tail];
1177}
1178
1179static void queue_event(apm_event_t event, struct apm_user *sender)
1180{
1181 struct apm_user *as;
1182
1183 spin_lock(&user_list_lock);
1184 if (user_list == NULL)
1185 goto out;
1186 for (as = user_list; as != NULL; as = as->next) {
1187 if ((as == sender) || (!as->reader))
1188 continue;
1189 if (++as->event_head >= APM_MAX_EVENTS)
1190 as->event_head = 0;
1191
1192 if (as->event_head == as->event_tail) {
1193 static int notified;
1194
1195 if (notified++ == 0)
1196 printk(KERN_ERR "apm: an event queue overflowed\n");
1197 if (++as->event_tail >= APM_MAX_EVENTS)
1198 as->event_tail = 0;
1199 }
1200 as->events[as->event_head] = event;
1201 if (!as->suser || !as->writer)
1202 continue;
1203 switch (event) {
1204 case APM_SYS_SUSPEND:
1205 case APM_USER_SUSPEND:
1206 as->suspends_pending++;
1207 suspends_pending++;
1208 break;
1209
1210 case APM_SYS_STANDBY:
1211 case APM_USER_STANDBY:
1212 as->standbys_pending++;
1213 standbys_pending++;
1214 break;
1215 }
1216 }
1217 wake_up_interruptible(&apm_waitqueue);
1218out:
1219 spin_unlock(&user_list_lock);
1220}
1221
1222static void reinit_timer(void)
1223{
1224#ifdef INIT_TIMER_AFTER_SUSPEND
1225 unsigned long flags;
1226
1227 spin_lock_irqsave(&i8253_lock, flags);
1228
1229 outb_pit(0x34, PIT_MODE);
1230 udelay(10);
1231 outb_pit(LATCH & 0xff, PIT_CH0);
1232 udelay(10);
1233 outb_pit(LATCH >> 8, PIT_CH0);
1234 udelay(10);
1235 spin_unlock_irqrestore(&i8253_lock, flags);
1236#endif
1237}
1238
1239static int suspend(int vetoable)
1240{
1241 int err;
1242 struct apm_user *as;
1243
1244 dpm_suspend_start(PMSG_SUSPEND);
1245
1246 dpm_suspend_noirq(PMSG_SUSPEND);
1247
1248 local_irq_disable();
1249 sysdev_suspend(PMSG_SUSPEND);
1250
1251 local_irq_enable();
1252
1253 save_processor_state();
1254 err = set_system_power_state(APM_STATE_SUSPEND);
1255 ignore_normal_resume = 1;
1256 restore_processor_state();
1257
1258 local_irq_disable();
1259 reinit_timer();
1260
1261 if (err == APM_NO_ERROR)
1262 err = APM_SUCCESS;
1263 if (err != APM_SUCCESS)
1264 apm_error("suspend", err);
1265 err = (err == APM_SUCCESS) ? 0 : -EIO;
1266
1267 sysdev_resume();
1268 local_irq_enable();
1269
1270 dpm_resume_noirq(PMSG_RESUME);
1271
1272 dpm_resume_end(PMSG_RESUME);
1273 queue_event(APM_NORMAL_RESUME, NULL);
1274 spin_lock(&user_list_lock);
1275 for (as = user_list; as != NULL; as = as->next) {
1276 as->suspend_wait = 0;
1277 as->suspend_result = err;
1278 }
1279 spin_unlock(&user_list_lock);
1280 wake_up_interruptible(&apm_suspend_waitqueue);
1281 return err;
1282}
1283
1284static void standby(void)
1285{
1286 int err;
1287
1288 dpm_suspend_noirq(PMSG_SUSPEND);
1289
1290 local_irq_disable();
1291 sysdev_suspend(PMSG_SUSPEND);
1292 local_irq_enable();
1293
1294 err = set_system_power_state(APM_STATE_STANDBY);
1295 if ((err != APM_SUCCESS) && (err != APM_NO_ERROR))
1296 apm_error("standby", err);
1297
1298 local_irq_disable();
1299 sysdev_resume();
1300 local_irq_enable();
1301
1302 dpm_resume_noirq(PMSG_RESUME);
1303}
1304
1305static apm_event_t get_event(void)
1306{
1307 int error;
1308 apm_event_t event = APM_NO_EVENTS;
1309 apm_eventinfo_t info;
1310
1311 static int notified;
1312
1313
1314 error = apm_get_event(&event, &info);
1315 if (error == APM_SUCCESS)
1316 return event;
1317
1318 if ((error != APM_NO_EVENTS) && (notified++ == 0))
1319 apm_error("get_event", error);
1320
1321 return 0;
1322}
1323
1324static void check_events(void)
1325{
1326 apm_event_t event;
1327 static unsigned long last_resume;
1328 static int ignore_bounce;
1329
1330 while ((event = get_event()) != 0) {
1331 if (debug) {
1332 if (event <= NR_APM_EVENT_NAME)
1333 printk(KERN_DEBUG "apm: received %s notify\n",
1334 apm_event_name[event - 1]);
1335 else
1336 printk(KERN_DEBUG "apm: received unknown "
1337 "event 0x%02x\n", event);
1338 }
1339 if (ignore_bounce
1340 && (time_after(jiffies, last_resume + bounce_interval)))
1341 ignore_bounce = 0;
1342
1343 switch (event) {
1344 case APM_SYS_STANDBY:
1345 case APM_USER_STANDBY:
1346 queue_event(event, NULL);
1347 if (standbys_pending <= 0)
1348 standby();
1349 break;
1350
1351 case APM_USER_SUSPEND:
1352#ifdef CONFIG_APM_IGNORE_USER_SUSPEND
1353 if (apm_info.connection_version > 0x100)
1354 set_system_power_state(APM_STATE_REJECT);
1355 break;
1356#endif
1357 case APM_SYS_SUSPEND:
1358 if (ignore_bounce) {
1359 if (apm_info.connection_version > 0x100)
1360 set_system_power_state(APM_STATE_REJECT);
1361 break;
1362 }
1363
1364
1365
1366
1367
1368
1369
1370
1371 if (ignore_sys_suspend)
1372 return;
1373 ignore_sys_suspend = 1;
1374 queue_event(event, NULL);
1375 if (suspends_pending <= 0)
1376 (void) suspend(1);
1377 break;
1378
1379 case APM_NORMAL_RESUME:
1380 case APM_CRITICAL_RESUME:
1381 case APM_STANDBY_RESUME:
1382 ignore_sys_suspend = 0;
1383 last_resume = jiffies;
1384 ignore_bounce = 1;
1385 if ((event != APM_NORMAL_RESUME)
1386 || (ignore_normal_resume == 0)) {
1387 dpm_resume_end(PMSG_RESUME);
1388 queue_event(event, NULL);
1389 }
1390 ignore_normal_resume = 0;
1391 break;
1392
1393 case APM_CAPABILITY_CHANGE:
1394 case APM_LOW_BATTERY:
1395 case APM_POWER_STATUS_CHANGE:
1396 queue_event(event, NULL);
1397
1398 break;
1399
1400 case APM_UPDATE_TIME:
1401 break;
1402
1403 case APM_CRITICAL_SUSPEND:
1404
1405
1406
1407 (void)suspend(0);
1408 break;
1409 }
1410 }
1411}
1412
1413static void apm_event_handler(void)
1414{
1415 static int pending_count = 4;
1416 int err;
1417
1418 if ((standbys_pending > 0) || (suspends_pending > 0)) {
1419 if ((apm_info.connection_version > 0x100) &&
1420 (pending_count-- <= 0)) {
1421 pending_count = 4;
1422 if (debug)
1423 printk(KERN_DEBUG "apm: setting state busy\n");
1424 err = set_system_power_state(APM_STATE_BUSY);
1425 if (err)
1426 apm_error("busy", err);
1427 }
1428 } else
1429 pending_count = 4;
1430 check_events();
1431}
1432
1433
1434
1435
1436
1437static void apm_mainloop(void)
1438{
1439 DECLARE_WAITQUEUE(wait, current);
1440
1441 add_wait_queue(&apm_waitqueue, &wait);
1442 set_current_state(TASK_INTERRUPTIBLE);
1443 for (;;) {
1444 schedule_timeout(APM_CHECK_TIMEOUT);
1445 if (kthread_should_stop())
1446 break;
1447
1448
1449
1450
1451 set_current_state(TASK_INTERRUPTIBLE);
1452 apm_event_handler();
1453 }
1454 remove_wait_queue(&apm_waitqueue, &wait);
1455}
1456
1457static int check_apm_user(struct apm_user *as, const char *func)
1458{
1459 if (as == NULL || as->magic != APM_BIOS_MAGIC) {
1460 printk(KERN_ERR "apm: %s passed bad filp\n", func);
1461 return 1;
1462 }
1463 return 0;
1464}
1465
1466static ssize_t do_read(struct file *fp, char __user *buf, size_t count, loff_t *ppos)
1467{
1468 struct apm_user *as;
1469 int i;
1470 apm_event_t event;
1471
1472 as = fp->private_data;
1473 if (check_apm_user(as, "read"))
1474 return -EIO;
1475 if ((int)count < sizeof(apm_event_t))
1476 return -EINVAL;
1477 if ((queue_empty(as)) && (fp->f_flags & O_NONBLOCK))
1478 return -EAGAIN;
1479 wait_event_interruptible(apm_waitqueue, !queue_empty(as));
1480 i = count;
1481 while ((i >= sizeof(event)) && !queue_empty(as)) {
1482 event = get_queued_event(as);
1483 if (copy_to_user(buf, &event, sizeof(event))) {
1484 if (i < count)
1485 break;
1486 return -EFAULT;
1487 }
1488 switch (event) {
1489 case APM_SYS_SUSPEND:
1490 case APM_USER_SUSPEND:
1491 as->suspends_read++;
1492 break;
1493
1494 case APM_SYS_STANDBY:
1495 case APM_USER_STANDBY:
1496 as->standbys_read++;
1497 break;
1498 }
1499 buf += sizeof(event);
1500 i -= sizeof(event);
1501 }
1502 if (i < count)
1503 return count - i;
1504 if (signal_pending(current))
1505 return -ERESTARTSYS;
1506 return 0;
1507}
1508
1509static unsigned int do_poll(struct file *fp, poll_table *wait)
1510{
1511 struct apm_user *as;
1512
1513 as = fp->private_data;
1514 if (check_apm_user(as, "poll"))
1515 return 0;
1516 poll_wait(fp, &apm_waitqueue, wait);
1517 if (!queue_empty(as))
1518 return POLLIN | POLLRDNORM;
1519 return 0;
1520}
1521
1522static long do_ioctl(struct file *filp, u_int cmd, u_long arg)
1523{
1524 struct apm_user *as;
1525 int ret;
1526
1527 as = filp->private_data;
1528 if (check_apm_user(as, "ioctl"))
1529 return -EIO;
1530 if (!as->suser || !as->writer)
1531 return -EPERM;
1532 switch (cmd) {
1533 case APM_IOC_STANDBY:
1534 lock_kernel();
1535 if (as->standbys_read > 0) {
1536 as->standbys_read--;
1537 as->standbys_pending--;
1538 standbys_pending--;
1539 } else
1540 queue_event(APM_USER_STANDBY, as);
1541 if (standbys_pending <= 0)
1542 standby();
1543 unlock_kernel();
1544 break;
1545 case APM_IOC_SUSPEND:
1546 lock_kernel();
1547 if (as->suspends_read > 0) {
1548 as->suspends_read--;
1549 as->suspends_pending--;
1550 suspends_pending--;
1551 } else
1552 queue_event(APM_USER_SUSPEND, as);
1553 if (suspends_pending <= 0) {
1554 ret = suspend(1);
1555 } else {
1556 as->suspend_wait = 1;
1557 wait_event_interruptible(apm_suspend_waitqueue,
1558 as->suspend_wait == 0);
1559 ret = as->suspend_result;
1560 }
1561 unlock_kernel();
1562 return ret;
1563 default:
1564 return -ENOTTY;
1565 }
1566 return 0;
1567}
1568
1569static int do_release(struct inode *inode, struct file *filp)
1570{
1571 struct apm_user *as;
1572
1573 as = filp->private_data;
1574 if (check_apm_user(as, "release"))
1575 return 0;
1576 filp->private_data = NULL;
1577 if (as->standbys_pending > 0) {
1578 standbys_pending -= as->standbys_pending;
1579 if (standbys_pending <= 0)
1580 standby();
1581 }
1582 if (as->suspends_pending > 0) {
1583 suspends_pending -= as->suspends_pending;
1584 if (suspends_pending <= 0)
1585 (void) suspend(1);
1586 }
1587 spin_lock(&user_list_lock);
1588 if (user_list == as)
1589 user_list = as->next;
1590 else {
1591 struct apm_user *as1;
1592
1593 for (as1 = user_list;
1594 (as1 != NULL) && (as1->next != as);
1595 as1 = as1->next)
1596 ;
1597 if (as1 == NULL)
1598 printk(KERN_ERR "apm: filp not in user list\n");
1599 else
1600 as1->next = as->next;
1601 }
1602 spin_unlock(&user_list_lock);
1603 kfree(as);
1604 return 0;
1605}
1606
1607static int do_open(struct inode *inode, struct file *filp)
1608{
1609 struct apm_user *as;
1610
1611 lock_kernel();
1612 as = kmalloc(sizeof(*as), GFP_KERNEL);
1613 if (as == NULL) {
1614 printk(KERN_ERR "apm: cannot allocate struct of size %d bytes\n",
1615 sizeof(*as));
1616 unlock_kernel();
1617 return -ENOMEM;
1618 }
1619 as->magic = APM_BIOS_MAGIC;
1620 as->event_tail = as->event_head = 0;
1621 as->suspends_pending = as->standbys_pending = 0;
1622 as->suspends_read = as->standbys_read = 0;
1623
1624
1625
1626
1627
1628
1629
1630 as->suser = capable(CAP_SYS_ADMIN);
1631 as->writer = (filp->f_mode & FMODE_WRITE) == FMODE_WRITE;
1632 as->reader = (filp->f_mode & FMODE_READ) == FMODE_READ;
1633 spin_lock(&user_list_lock);
1634 as->next = user_list;
1635 user_list = as;
1636 spin_unlock(&user_list_lock);
1637 filp->private_data = as;
1638 unlock_kernel();
1639 return 0;
1640}
1641
1642static int proc_apm_show(struct seq_file *m, void *v)
1643{
1644 unsigned short bx;
1645 unsigned short cx;
1646 unsigned short dx;
1647 int error;
1648 unsigned short ac_line_status = 0xff;
1649 unsigned short battery_status = 0xff;
1650 unsigned short battery_flag = 0xff;
1651 int percentage = -1;
1652 int time_units = -1;
1653 char *units = "?";
1654
1655 if ((num_online_cpus() == 1) &&
1656 !(error = apm_get_power_status(&bx, &cx, &dx))) {
1657 ac_line_status = (bx >> 8) & 0xff;
1658 battery_status = bx & 0xff;
1659 if ((cx & 0xff) != 0xff)
1660 percentage = cx & 0xff;
1661
1662 if (apm_info.connection_version > 0x100) {
1663 battery_flag = (cx >> 8) & 0xff;
1664 if (dx != 0xffff) {
1665 units = (dx & 0x8000) ? "min" : "sec";
1666 time_units = dx & 0x7fff;
1667 }
1668 }
1669 }
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703
1704
1705
1706
1707
1708 seq_printf(m, "%s %d.%d 0x%02x 0x%02x 0x%02x 0x%02x %d%% %d %s\n",
1709 driver_version,
1710 (apm_info.bios.version >> 8) & 0xff,
1711 apm_info.bios.version & 0xff,
1712 apm_info.bios.flags,
1713 ac_line_status,
1714 battery_status,
1715 battery_flag,
1716 percentage,
1717 time_units,
1718 units);
1719 return 0;
1720}
1721
1722static int proc_apm_open(struct inode *inode, struct file *file)
1723{
1724 return single_open(file, proc_apm_show, NULL);
1725}
1726
1727static const struct file_operations apm_file_ops = {
1728 .owner = THIS_MODULE,
1729 .open = proc_apm_open,
1730 .read = seq_read,
1731 .llseek = seq_lseek,
1732 .release = single_release,
1733};
1734
1735static int apm(void *unused)
1736{
1737 unsigned short bx;
1738 unsigned short cx;
1739 unsigned short dx;
1740 int error;
1741 char *power_stat;
1742 char *bat_stat;
1743
1744
1745
1746
1747
1748
1749
1750 set_cpus_allowed_ptr(current, cpumask_of(0));
1751 BUG_ON(smp_processor_id() != 0);
1752
1753 if (apm_info.connection_version == 0) {
1754 apm_info.connection_version = apm_info.bios.version;
1755 if (apm_info.connection_version > 0x100) {
1756
1757
1758
1759 if (apm_info.connection_version > 0x0102)
1760 apm_info.connection_version = 0x0102;
1761 error = apm_driver_version(&apm_info.connection_version);
1762 if (error != APM_SUCCESS) {
1763 apm_error("driver version", error);
1764
1765 apm_info.connection_version = 0x100;
1766 }
1767 }
1768 }
1769
1770 if (debug)
1771 printk(KERN_INFO "apm: Connection version %d.%d\n",
1772 (apm_info.connection_version >> 8) & 0xff,
1773 apm_info.connection_version & 0xff);
1774
1775#ifdef CONFIG_APM_DO_ENABLE
1776 if (apm_info.bios.flags & APM_BIOS_DISABLED) {
1777
1778
1779
1780
1781
1782 error = apm_enable_power_management(1);
1783 if (error) {
1784 apm_error("enable power management", error);
1785 return -1;
1786 }
1787 }
1788#endif
1789
1790 if ((apm_info.bios.flags & APM_BIOS_DISENGAGED)
1791 && (apm_info.connection_version > 0x0100)) {
1792 error = apm_engage_power_management(APM_DEVICE_ALL, 1);
1793 if (error) {
1794 apm_error("engage power management", error);
1795 return -1;
1796 }
1797 }
1798
1799 if (debug && (num_online_cpus() == 1 || smp)) {
1800 error = apm_get_power_status(&bx, &cx, &dx);
1801 if (error)
1802 printk(KERN_INFO "apm: power status not available\n");
1803 else {
1804 switch ((bx >> 8) & 0xff) {
1805 case 0:
1806 power_stat = "off line";
1807 break;
1808 case 1:
1809 power_stat = "on line";
1810 break;
1811 case 2:
1812 power_stat = "on backup power";
1813 break;
1814 default:
1815 power_stat = "unknown";
1816 break;
1817 }
1818 switch (bx & 0xff) {
1819 case 0:
1820 bat_stat = "high";
1821 break;
1822 case 1:
1823 bat_stat = "low";
1824 break;
1825 case 2:
1826 bat_stat = "critical";
1827 break;
1828 case 3:
1829 bat_stat = "charging";
1830 break;
1831 default:
1832 bat_stat = "unknown";
1833 break;
1834 }
1835 printk(KERN_INFO
1836 "apm: AC %s, battery status %s, battery life ",
1837 power_stat, bat_stat);
1838 if ((cx & 0xff) == 0xff)
1839 printk("unknown\n");
1840 else
1841 printk("%d%%\n", cx & 0xff);
1842 if (apm_info.connection_version > 0x100) {
1843 printk(KERN_INFO
1844 "apm: battery flag 0x%02x, battery life ",
1845 (cx >> 8) & 0xff);
1846 if (dx == 0xffff)
1847 printk("unknown\n");
1848 else
1849 printk("%d %s\n", dx & 0x7fff,
1850 (dx & 0x8000) ?
1851 "minutes" : "seconds");
1852 }
1853 }
1854 }
1855
1856
1857 if (power_off)
1858 pm_power_off = apm_power_off;
1859
1860 if (num_online_cpus() == 1 || smp) {
1861#if defined(CONFIG_APM_DISPLAY_BLANK) && defined(CONFIG_VT)
1862 console_blank_hook = apm_console_blank;
1863#endif
1864 apm_mainloop();
1865#if defined(CONFIG_APM_DISPLAY_BLANK) && defined(CONFIG_VT)
1866 console_blank_hook = NULL;
1867#endif
1868 }
1869
1870 return 0;
1871}
1872
1873#ifndef MODULE
1874static int __init apm_setup(char *str)
1875{
1876 int invert;
1877
1878 while ((str != NULL) && (*str != '\0')) {
1879 if (strncmp(str, "off", 3) == 0)
1880 apm_disabled = 1;
1881 if (strncmp(str, "on", 2) == 0)
1882 apm_disabled = 0;
1883 if ((strncmp(str, "bounce-interval=", 16) == 0) ||
1884 (strncmp(str, "bounce_interval=", 16) == 0))
1885 bounce_interval = simple_strtol(str + 16, NULL, 0);
1886 if ((strncmp(str, "idle-threshold=", 15) == 0) ||
1887 (strncmp(str, "idle_threshold=", 15) == 0))
1888 idle_threshold = simple_strtol(str + 15, NULL, 0);
1889 if ((strncmp(str, "idle-period=", 12) == 0) ||
1890 (strncmp(str, "idle_period=", 12) == 0))
1891 idle_period = simple_strtol(str + 12, NULL, 0);
1892 invert = (strncmp(str, "no-", 3) == 0) ||
1893 (strncmp(str, "no_", 3) == 0);
1894 if (invert)
1895 str += 3;
1896 if (strncmp(str, "debug", 5) == 0)
1897 debug = !invert;
1898 if ((strncmp(str, "power-off", 9) == 0) ||
1899 (strncmp(str, "power_off", 9) == 0))
1900 power_off = !invert;
1901 if (strncmp(str, "smp", 3) == 0) {
1902 smp = !invert;
1903 idle_threshold = 100;
1904 }
1905 if ((strncmp(str, "allow-ints", 10) == 0) ||
1906 (strncmp(str, "allow_ints", 10) == 0))
1907 apm_info.allow_ints = !invert;
1908 if ((strncmp(str, "broken-psr", 10) == 0) ||
1909 (strncmp(str, "broken_psr", 10) == 0))
1910 apm_info.get_power_status_broken = !invert;
1911 if ((strncmp(str, "realmode-power-off", 18) == 0) ||
1912 (strncmp(str, "realmode_power_off", 18) == 0))
1913 apm_info.realmode_power_off = !invert;
1914 str = strchr(str, ',');
1915 if (str != NULL)
1916 str += strspn(str, ", \t");
1917 }
1918 return 1;
1919}
1920
1921__setup("apm=", apm_setup);
1922#endif
1923
1924static const struct file_operations apm_bios_fops = {
1925 .owner = THIS_MODULE,
1926 .read = do_read,
1927 .poll = do_poll,
1928 .unlocked_ioctl = do_ioctl,
1929 .open = do_open,
1930 .release = do_release,
1931};
1932
1933static struct miscdevice apm_device = {
1934 APM_MINOR_DEV,
1935 "apm_bios",
1936 &apm_bios_fops
1937};
1938
1939
1940
1941static int __init print_if_true(const struct dmi_system_id *d)
1942{
1943 printk("%s\n", d->ident);
1944 return 0;
1945}
1946
1947
1948
1949
1950
1951static int __init broken_ps2_resume(const struct dmi_system_id *d)
1952{
1953 printk(KERN_INFO "%s machine detected. Mousepad Resume Bug "
1954 "workaround hopefully not needed.\n", d->ident);
1955 return 0;
1956}
1957
1958
1959static int __init set_realmode_power_off(const struct dmi_system_id *d)
1960{
1961 if (apm_info.realmode_power_off == 0) {
1962 apm_info.realmode_power_off = 1;
1963 printk(KERN_INFO "%s bios detected. "
1964 "Using realmode poweroff only.\n", d->ident);
1965 }
1966 return 0;
1967}
1968
1969
1970static int __init set_apm_ints(const struct dmi_system_id *d)
1971{
1972 if (apm_info.allow_ints == 0) {
1973 apm_info.allow_ints = 1;
1974 printk(KERN_INFO "%s machine detected. "
1975 "Enabling interrupts during APM calls.\n", d->ident);
1976 }
1977 return 0;
1978}
1979
1980
1981static int __init apm_is_horked(const struct dmi_system_id *d)
1982{
1983 if (apm_info.disabled == 0) {
1984 apm_info.disabled = 1;
1985 printk(KERN_INFO "%s machine detected. "
1986 "Disabling APM.\n", d->ident);
1987 }
1988 return 0;
1989}
1990
1991static int __init apm_is_horked_d850md(const struct dmi_system_id *d)
1992{
1993 if (apm_info.disabled == 0) {
1994 apm_info.disabled = 1;
1995 printk(KERN_INFO "%s machine detected. "
1996 "Disabling APM.\n", d->ident);
1997 printk(KERN_INFO "This bug is fixed in bios P15 which is available for \n");
1998 printk(KERN_INFO "download from support.intel.com \n");
1999 }
2000 return 0;
2001}
2002
2003
2004static int __init apm_likes_to_melt(const struct dmi_system_id *d)
2005{
2006 if (apm_info.forbid_idle == 0) {
2007 apm_info.forbid_idle = 1;
2008 printk(KERN_INFO "%s machine detected. "
2009 "Disabling APM idle calls.\n", d->ident);
2010 }
2011 return 0;
2012}
2013
2014
2015
2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
2027
2028
2029static int __init broken_apm_power(const struct dmi_system_id *d)
2030{
2031 apm_info.get_power_status_broken = 1;
2032 printk(KERN_WARNING "BIOS strings suggest APM bugs, "
2033 "disabling power status reporting.\n");
2034 return 0;
2035}
2036
2037
2038
2039
2040
2041static int __init swab_apm_power_in_minutes(const struct dmi_system_id *d)
2042{
2043 apm_info.get_power_status_swabinminutes = 1;
2044 printk(KERN_WARNING "BIOS strings suggest APM reports battery life "
2045 "in minutes and wrong byte order.\n");
2046 return 0;
2047}
2048
2049static struct dmi_system_id __initdata apm_dmi_table[] = {
2050 {
2051 print_if_true,
2052 KERN_WARNING "IBM T23 - BIOS 1.03b+ and controller firmware 1.02+ may be needed for Linux APM.",
2053 { DMI_MATCH(DMI_SYS_VENDOR, "IBM"),
2054 DMI_MATCH(DMI_BIOS_VERSION, "1AET38WW (1.01b)"), },
2055 },
2056 {
2057 broken_ps2_resume, "Dell Latitude C600",
2058 { DMI_MATCH(DMI_SYS_VENDOR, "Dell"),
2059 DMI_MATCH(DMI_PRODUCT_NAME, "Latitude C600"), },
2060 },
2061 {
2062 set_apm_ints, "Dell Latitude",
2063 { DMI_MATCH(DMI_SYS_VENDOR, "Dell Computer Corporation"),
2064 DMI_MATCH(DMI_PRODUCT_NAME, "Latitude C510"), }
2065 },
2066 {
2067 apm_is_horked, "Dell Inspiron 2500",
2068 { DMI_MATCH(DMI_SYS_VENDOR, "Dell Computer Corporation"),
2069 DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 2500"),
2070 DMI_MATCH(DMI_BIOS_VENDOR, "Phoenix Technologies LTD"),
2071 DMI_MATCH(DMI_BIOS_VERSION, "A11"), },
2072 },
2073 {
2074 set_apm_ints, "Dell Inspiron", {
2075 DMI_MATCH(DMI_SYS_VENDOR, "Dell Computer Corporation"),
2076 DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 4000"), },
2077 },
2078 {
2079 broken_apm_power, "Dell Inspiron 5000e",
2080 { DMI_MATCH(DMI_BIOS_VENDOR, "Phoenix Technologies LTD"),
2081 DMI_MATCH(DMI_BIOS_VERSION, "A04"),
2082 DMI_MATCH(DMI_BIOS_DATE, "08/24/2000"), },
2083 },
2084 {
2085 broken_apm_power, "Dell Inspiron 2500",
2086 { DMI_MATCH(DMI_BIOS_VENDOR, "Phoenix Technologies LTD"),
2087 DMI_MATCH(DMI_BIOS_VERSION, "A12"),
2088 DMI_MATCH(DMI_BIOS_DATE, "02/04/2002"), },
2089 },
2090 {
2091 apm_is_horked, "Dell Dimension 4100",
2092 { DMI_MATCH(DMI_SYS_VENDOR, "Dell Computer Corporation"),
2093 DMI_MATCH(DMI_PRODUCT_NAME, "XPS-Z"),
2094 DMI_MATCH(DMI_BIOS_VENDOR, "Intel Corp."),
2095 DMI_MATCH(DMI_BIOS_VERSION, "A11"), },
2096 },
2097 {
2098 set_apm_ints, "Compaq 12XL125",
2099 { DMI_MATCH(DMI_SYS_VENDOR, "Compaq"),
2100 DMI_MATCH(DMI_PRODUCT_NAME, "Compaq PC"),
2101 DMI_MATCH(DMI_BIOS_VENDOR, "Phoenix Technologies LTD"),
2102 DMI_MATCH(DMI_BIOS_VERSION, "4.06"), },
2103 },
2104 {
2105 set_apm_ints, "ASUSTeK",
2106 { DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK Computer Inc."),
2107 DMI_MATCH(DMI_PRODUCT_NAME, "L8400K series Notebook PC"), },
2108 },
2109 {
2110 apm_is_horked, "ABIT KX7-333[R]",
2111 { DMI_MATCH(DMI_BOARD_VENDOR, "ABIT"),
2112 DMI_MATCH(DMI_BOARD_NAME, "VT8367-8233A (KX7-333[R])"), },
2113 },
2114 {
2115 apm_is_horked, "Trigem Delhi3",
2116 { DMI_MATCH(DMI_SYS_VENDOR, "TriGem Computer, Inc"),
2117 DMI_MATCH(DMI_PRODUCT_NAME, "Delhi3"), },
2118 },
2119 {
2120 apm_is_horked, "Fujitsu-Siemens",
2121 { DMI_MATCH(DMI_BIOS_VENDOR, "hoenix/FUJITSU SIEMENS"),
2122 DMI_MATCH(DMI_BIOS_VERSION, "Version1.01"), },
2123 },
2124 {
2125 apm_is_horked_d850md, "Intel D850MD",
2126 { DMI_MATCH(DMI_BIOS_VENDOR, "Intel Corp."),
2127 DMI_MATCH(DMI_BIOS_VERSION, "MV85010A.86A.0016.P07.0201251536"), },
2128 },
2129 {
2130 apm_is_horked, "Intel D810EMO",
2131 { DMI_MATCH(DMI_BIOS_VENDOR, "Intel Corp."),
2132 DMI_MATCH(DMI_BIOS_VERSION, "MO81010A.86A.0008.P04.0004170800"), },
2133 },
2134 {
2135 apm_is_horked, "Dell XPS-Z",
2136 { DMI_MATCH(DMI_BIOS_VENDOR, "Intel Corp."),
2137 DMI_MATCH(DMI_BIOS_VERSION, "A11"),
2138 DMI_MATCH(DMI_PRODUCT_NAME, "XPS-Z"), },
2139 },
2140 {
2141 apm_is_horked, "Sharp PC-PJ/AX",
2142 { DMI_MATCH(DMI_SYS_VENDOR, "SHARP"),
2143 DMI_MATCH(DMI_PRODUCT_NAME, "PC-PJ/AX"),
2144 DMI_MATCH(DMI_BIOS_VENDOR, "SystemSoft"),
2145 DMI_MATCH(DMI_BIOS_VERSION, "Version R2.08"), },
2146 },
2147 {
2148 apm_is_horked, "Dell Inspiron 2500",
2149 { DMI_MATCH(DMI_SYS_VENDOR, "Dell Computer Corporation"),
2150 DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 2500"),
2151 DMI_MATCH(DMI_BIOS_VENDOR, "Phoenix Technologies LTD"),
2152 DMI_MATCH(DMI_BIOS_VERSION, "A11"), },
2153 },
2154 {
2155 apm_likes_to_melt, "Jabil AMD",
2156 { DMI_MATCH(DMI_BIOS_VENDOR, "American Megatrends Inc."),
2157 DMI_MATCH(DMI_BIOS_VERSION, "0AASNP06"), },
2158 },
2159 {
2160 apm_likes_to_melt, "AMI Bios",
2161 { DMI_MATCH(DMI_BIOS_VENDOR, "American Megatrends Inc."),
2162 DMI_MATCH(DMI_BIOS_VERSION, "0AASNP05"), },
2163 },
2164 {
2165 swab_apm_power_in_minutes, "Sony VAIO",
2166 { DMI_MATCH(DMI_BIOS_VENDOR, "Phoenix Technologies LTD"),
2167 DMI_MATCH(DMI_BIOS_VERSION, "R0206H"),
2168 DMI_MATCH(DMI_BIOS_DATE, "08/23/99"), },
2169 },
2170 {
2171 swab_apm_power_in_minutes, "Sony VAIO",
2172 { DMI_MATCH(DMI_BIOS_VENDOR, "Phoenix Technologies LTD"),
2173 DMI_MATCH(DMI_BIOS_VERSION, "W2K06H0"),
2174 DMI_MATCH(DMI_BIOS_DATE, "02/03/00"), },
2175 },
2176 {
2177 swab_apm_power_in_minutes, "Sony VAIO",
2178 { DMI_MATCH(DMI_BIOS_VENDOR, "Phoenix Technologies LTD"),
2179 DMI_MATCH(DMI_BIOS_VERSION, "R0117A0"),
2180 DMI_MATCH(DMI_BIOS_DATE, "04/25/00"), },
2181 },
2182 {
2183 swab_apm_power_in_minutes, "Sony VAIO",
2184 { DMI_MATCH(DMI_BIOS_VENDOR, "Phoenix Technologies LTD"),
2185 DMI_MATCH(DMI_BIOS_VERSION, "R0121Z1"),
2186 DMI_MATCH(DMI_BIOS_DATE, "05/11/00"), },
2187 },
2188 {
2189 swab_apm_power_in_minutes, "Sony VAIO",
2190 { DMI_MATCH(DMI_BIOS_VENDOR, "Phoenix Technologies LTD"),
2191 DMI_MATCH(DMI_BIOS_VERSION, "WME01Z1"),
2192 DMI_MATCH(DMI_BIOS_DATE, "08/11/00"), },
2193 },
2194 {
2195 swab_apm_power_in_minutes, "Sony VAIO",
2196 { DMI_MATCH(DMI_BIOS_VENDOR, "Phoenix Technologies LTD"),
2197 DMI_MATCH(DMI_BIOS_VERSION, "R0206Z3"),
2198 DMI_MATCH(DMI_BIOS_DATE, "12/25/00"), },
2199 },
2200 {
2201 swab_apm_power_in_minutes, "Sony VAIO",
2202 { DMI_MATCH(DMI_BIOS_VENDOR, "Phoenix Technologies LTD"),
2203 DMI_MATCH(DMI_BIOS_VERSION, "R0203D0"),
2204 DMI_MATCH(DMI_BIOS_DATE, "05/12/00"), },
2205 },
2206 {
2207 swab_apm_power_in_minutes, "Sony VAIO",
2208 { DMI_MATCH(DMI_BIOS_VENDOR, "Phoenix Technologies LTD"),
2209 DMI_MATCH(DMI_BIOS_VERSION, "R0203Z3"),
2210 DMI_MATCH(DMI_BIOS_DATE, "08/25/00"), },
2211 },
2212 {
2213 swab_apm_power_in_minutes, "Sony VAIO",
2214 { DMI_MATCH(DMI_BIOS_VENDOR, "Phoenix Technologies LTD"),
2215 DMI_MATCH(DMI_BIOS_VERSION, "R0209Z3"),
2216 DMI_MATCH(DMI_BIOS_DATE, "05/12/01"), },
2217 },
2218 {
2219 swab_apm_power_in_minutes, "Sony VAIO",
2220 { DMI_MATCH(DMI_BIOS_VENDOR, "Phoenix Technologies LTD"),
2221 DMI_MATCH(DMI_BIOS_VERSION, "R0204K2"),
2222 DMI_MATCH(DMI_BIOS_DATE, "08/28/00"), },
2223 },
2224
2225 {
2226 swab_apm_power_in_minutes, "Sony VAIO",
2227 { DMI_MATCH(DMI_BIOS_VENDOR, "Phoenix Technologies LTD"),
2228 DMI_MATCH(DMI_BIOS_VERSION, "R0208P1"),
2229 DMI_MATCH(DMI_BIOS_DATE, "11/09/00"), },
2230 },
2231 {
2232 swab_apm_power_in_minutes, "Sony VAIO",
2233 { DMI_MATCH(DMI_BIOS_VENDOR, "Phoenix Technologies LTD"),
2234 DMI_MATCH(DMI_BIOS_VERSION, "R0204P1"),
2235 DMI_MATCH(DMI_BIOS_DATE, "09/12/00"), },
2236 },
2237 {
2238 swab_apm_power_in_minutes, "Sony VAIO",
2239 { DMI_MATCH(DMI_BIOS_VENDOR, "Phoenix Technologies LTD"),
2240 DMI_MATCH(DMI_BIOS_VERSION, "WXPO1Z3"),
2241 DMI_MATCH(DMI_BIOS_DATE, "10/26/01"), },
2242 },
2243 {
2244 set_realmode_power_off, "Award Software v4.60 PGMA",
2245 { DMI_MATCH(DMI_BIOS_VENDOR, "Award Software International, Inc."),
2246 DMI_MATCH(DMI_BIOS_VERSION, "4.60 PGMA"),
2247 DMI_MATCH(DMI_BIOS_DATE, "134526184"), },
2248 },
2249
2250
2251
2252 {
2253 set_apm_ints, "IBM",
2254 { DMI_MATCH(DMI_SYS_VENDOR, "IBM"), },
2255 },
2256
2257 { }
2258};
2259
2260
2261
2262
2263
2264
2265
2266
2267
2268
2269
2270static int __init apm_init(void)
2271{
2272 struct desc_struct *gdt;
2273 int err;
2274
2275 dmi_check_system(apm_dmi_table);
2276
2277 if (apm_info.bios.version == 0 || paravirt_enabled() || machine_is_olpc()) {
2278 printk(KERN_INFO "apm: BIOS not found.\n");
2279 return -ENODEV;
2280 }
2281 printk(KERN_INFO
2282 "apm: BIOS version %d.%d Flags 0x%02x (Driver version %s)\n",
2283 ((apm_info.bios.version >> 8) & 0xff),
2284 (apm_info.bios.version & 0xff),
2285 apm_info.bios.flags,
2286 driver_version);
2287 if ((apm_info.bios.flags & APM_32_BIT_SUPPORT) == 0) {
2288 printk(KERN_INFO "apm: no 32 bit BIOS support\n");
2289 return -ENODEV;
2290 }
2291
2292 if (allow_ints)
2293 apm_info.allow_ints = 1;
2294 if (broken_psr)
2295 apm_info.get_power_status_broken = 1;
2296 if (realmode_power_off)
2297 apm_info.realmode_power_off = 1;
2298
2299 if (apm_disabled != -1)
2300 apm_info.disabled = apm_disabled;
2301
2302
2303
2304
2305
2306 if (apm_info.bios.version == 0x001)
2307 apm_info.bios.version = 0x100;
2308
2309
2310 if (apm_info.bios.version < 0x102)
2311 apm_info.bios.cseg_16_len = 0;
2312
2313 if (debug) {
2314 printk(KERN_INFO "apm: entry %x:%x cseg16 %x dseg %x",
2315 apm_info.bios.cseg, apm_info.bios.offset,
2316 apm_info.bios.cseg_16, apm_info.bios.dseg);
2317 if (apm_info.bios.version > 0x100)
2318 printk(" cseg len %x, dseg len %x",
2319 apm_info.bios.cseg_len,
2320 apm_info.bios.dseg_len);
2321 if (apm_info.bios.version > 0x101)
2322 printk(" cseg16 len %x", apm_info.bios.cseg_16_len);
2323 printk("\n");
2324 }
2325
2326 if (apm_info.disabled) {
2327 printk(KERN_NOTICE "apm: disabled on user request.\n");
2328 return -ENODEV;
2329 }
2330 if ((num_online_cpus() > 1) && !power_off && !smp) {
2331 printk(KERN_NOTICE "apm: disabled - APM is not SMP safe.\n");
2332 apm_info.disabled = 1;
2333 return -ENODEV;
2334 }
2335 if (pm_flags & PM_ACPI) {
2336 printk(KERN_NOTICE "apm: overridden by ACPI.\n");
2337 apm_info.disabled = 1;
2338 return -ENODEV;
2339 }
2340 pm_flags |= PM_APM;
2341
2342
2343
2344
2345
2346 apm_bios_entry.offset = apm_info.bios.offset;
2347 apm_bios_entry.segment = APM_CS;
2348
2349
2350
2351
2352
2353
2354
2355
2356
2357
2358
2359 gdt = get_cpu_gdt_table(0);
2360 set_desc_base(&gdt[APM_CS >> 3],
2361 (unsigned long)__va((unsigned long)apm_info.bios.cseg << 4));
2362 set_desc_base(&gdt[APM_CS_16 >> 3],
2363 (unsigned long)__va((unsigned long)apm_info.bios.cseg_16 << 4));
2364 set_desc_base(&gdt[APM_DS >> 3],
2365 (unsigned long)__va((unsigned long)apm_info.bios.dseg << 4));
2366
2367 proc_create("apm", 0, NULL, &apm_file_ops);
2368
2369 kapmd_task = kthread_create(apm, NULL, "kapmd");
2370 if (IS_ERR(kapmd_task)) {
2371 printk(KERN_ERR "apm: disabled - Unable to start kernel "
2372 "thread.\n");
2373 err = PTR_ERR(kapmd_task);
2374 kapmd_task = NULL;
2375 remove_proc_entry("apm", NULL);
2376 return err;
2377 }
2378 wake_up_process(kapmd_task);
2379
2380 if (num_online_cpus() > 1 && !smp) {
2381 printk(KERN_NOTICE
2382 "apm: disabled - APM is not SMP safe (power off active).\n");
2383 return 0;
2384 }
2385
2386
2387
2388
2389
2390
2391 if (misc_register(&apm_device))
2392 printk(KERN_WARNING "apm: Could not register misc device.\n");
2393
2394 if (HZ != 100)
2395 idle_period = (idle_period * HZ) / 100;
2396 if (idle_threshold < 100) {
2397 original_pm_idle = pm_idle;
2398 pm_idle = apm_cpu_idle;
2399 set_pm_idle = 1;
2400 }
2401
2402 return 0;
2403}
2404
2405static void __exit apm_exit(void)
2406{
2407 int error;
2408
2409 if (set_pm_idle) {
2410 pm_idle = original_pm_idle;
2411
2412
2413
2414
2415
2416 cpu_idle_wait();
2417 }
2418 if (((apm_info.bios.flags & APM_BIOS_DISENGAGED) == 0)
2419 && (apm_info.connection_version > 0x0100)) {
2420 error = apm_engage_power_management(APM_DEVICE_ALL, 0);
2421 if (error)
2422 apm_error("disengage power management", error);
2423 }
2424 misc_deregister(&apm_device);
2425 remove_proc_entry("apm", NULL);
2426 if (power_off)
2427 pm_power_off = NULL;
2428 if (kapmd_task) {
2429 kthread_stop(kapmd_task);
2430 kapmd_task = NULL;
2431 }
2432 pm_flags &= ~PM_APM;
2433}
2434
2435module_init(apm_init);
2436module_exit(apm_exit);
2437
2438MODULE_AUTHOR("Stephen Rothwell");
2439MODULE_DESCRIPTION("Advanced Power Management");
2440MODULE_LICENSE("GPL");
2441module_param(debug, bool, 0644);
2442MODULE_PARM_DESC(debug, "Enable debug mode");
2443module_param(power_off, bool, 0444);
2444MODULE_PARM_DESC(power_off, "Enable power off");
2445module_param(bounce_interval, int, 0444);
2446MODULE_PARM_DESC(bounce_interval,
2447 "Set the number of ticks to ignore suspend bounces");
2448module_param(allow_ints, bool, 0444);
2449MODULE_PARM_DESC(allow_ints, "Allow interrupts during BIOS calls");
2450module_param(broken_psr, bool, 0444);
2451MODULE_PARM_DESC(broken_psr, "BIOS has a broken GetPowerStatus call");
2452module_param(realmode_power_off, bool, 0444);
2453MODULE_PARM_DESC(realmode_power_off,
2454 "Switch to real mode before powering off");
2455module_param(idle_threshold, int, 0444);
2456MODULE_PARM_DESC(idle_threshold,
2457 "System idle percentage above which to make APM BIOS idle calls");
2458module_param(idle_period, int, 0444);
2459MODULE_PARM_DESC(idle_period,
2460 "Period (in sec/100) over which to caculate the idle percentage");
2461module_param(smp, bool, 0444);
2462MODULE_PARM_DESC(smp,
2463 "Set this to enable APM use on an SMP platform. Use with caution on older systems");
2464MODULE_ALIAS_MISCDEV(APM_MINOR_DEV);
2465