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204#define pr_fmt(fmt) "apm: " fmt
205
206#include <linux/module.h>
207
208#include <linux/poll.h>
209#include <linux/types.h>
210#include <linux/stddef.h>
211#include <linux/timer.h>
212#include <linux/fcntl.h>
213#include <linux/slab.h>
214#include <linux/stat.h>
215#include <linux/proc_fs.h>
216#include <linux/seq_file.h>
217#include <linux/miscdevice.h>
218#include <linux/apm_bios.h>
219#include <linux/init.h>
220#include <linux/time.h>
221#include <linux/sched.h>
222#include <linux/pm.h>
223#include <linux/capability.h>
224#include <linux/device.h>
225#include <linux/kernel.h>
226#include <linux/freezer.h>
227#include <linux/smp.h>
228#include <linux/dmi.h>
229#include <linux/suspend.h>
230#include <linux/kthread.h>
231#include <linux/jiffies.h>
232#include <linux/acpi.h>
233#include <linux/syscore_ops.h>
234#include <linux/i8253.h>
235#include <linux/cpuidle.h>
236
237#include <asm/uaccess.h>
238#include <asm/desc.h>
239#include <asm/olpc.h>
240#include <asm/paravirt.h>
241#include <asm/reboot.h>
242
243#if defined(CONFIG_APM_DISPLAY_BLANK) && defined(CONFIG_VT)
244extern int (*console_blank_hook)(int);
245#endif
246
247
248
249
250
251#define APM_MINOR_DEV 134
252
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295
296#define ALWAYS_CALL_BUSY 1
297
298
299
300
301
302
303#define APM_ZERO_SEGS
304
305#include <asm/apm.h>
306
307
308
309
310
311
312#undef INIT_TIMER_AFTER_SUSPEND
313
314#ifdef INIT_TIMER_AFTER_SUSPEND
315#include <linux/timex.h>
316#include <asm/io.h>
317#include <linux/delay.h>
318#endif
319
320
321
322
323#define APM_CHECK_TIMEOUT (HZ)
324
325
326
327
328#define DEFAULT_BOUNCE_INTERVAL (3 * HZ)
329
330
331
332
333#define APM_MAX_EVENTS 20
334
335
336
337
338struct apm_user {
339 int magic;
340 struct apm_user *next;
341 unsigned int suser: 1;
342 unsigned int writer: 1;
343 unsigned int reader: 1;
344 unsigned int suspend_wait: 1;
345 int suspend_result;
346 int suspends_pending;
347 int standbys_pending;
348 int suspends_read;
349 int standbys_read;
350 int event_head;
351 int event_tail;
352 apm_event_t events[APM_MAX_EVENTS];
353};
354
355
356
357
358#define APM_BIOS_MAGIC 0x4101
359
360
361
362
363#ifdef CONFIG_APM_CPU_IDLE
364#define DEFAULT_IDLE_THRESHOLD 95
365#else
366#define DEFAULT_IDLE_THRESHOLD 100
367#endif
368#define DEFAULT_IDLE_PERIOD (100 / 3)
369
370static int apm_cpu_idle(struct cpuidle_device *dev,
371 struct cpuidle_driver *drv, int index);
372
373static struct cpuidle_driver apm_idle_driver = {
374 .name = "apm_idle",
375 .owner = THIS_MODULE,
376 .states = {
377 { },
378 {
379 .name = "APM",
380 .desc = "APM idle",
381 .exit_latency = 250,
382 .target_residency = 500,
383 .enter = &apm_cpu_idle
384 },
385 },
386 .state_count = 2,
387};
388
389static struct cpuidle_device apm_cpuidle_device;
390
391
392
393
394__visible struct {
395 unsigned long offset;
396 unsigned short segment;
397} apm_bios_entry;
398static int clock_slowed;
399static int idle_threshold __read_mostly = DEFAULT_IDLE_THRESHOLD;
400static int idle_period __read_mostly = DEFAULT_IDLE_PERIOD;
401static int suspends_pending;
402static int standbys_pending;
403static int ignore_sys_suspend;
404static int ignore_normal_resume;
405static int bounce_interval __read_mostly = DEFAULT_BOUNCE_INTERVAL;
406
407static bool debug __read_mostly;
408static bool smp __read_mostly;
409static int apm_disabled = -1;
410#ifdef CONFIG_SMP
411static bool power_off;
412#else
413static bool power_off = 1;
414#endif
415static bool realmode_power_off;
416#ifdef CONFIG_APM_ALLOW_INTS
417static bool allow_ints = 1;
418#else
419static bool allow_ints;
420#endif
421static bool broken_psr;
422
423static DECLARE_WAIT_QUEUE_HEAD(apm_waitqueue);
424static DECLARE_WAIT_QUEUE_HEAD(apm_suspend_waitqueue);
425static struct apm_user *user_list;
426static DEFINE_SPINLOCK(user_list_lock);
427static DEFINE_MUTEX(apm_mutex);
428
429
430
431
432
433
434
435static struct desc_struct bad_bios_desc = GDT_ENTRY_INIT(0x4092,
436 (unsigned long)__va(0x400UL), PAGE_SIZE - 0x400 - 1);
437
438static const char driver_version[] = "1.16ac";
439
440static struct task_struct *kapmd_task;
441
442
443
444
445
446static const char * const apm_event_name[] = {
447 "system standby",
448 "system suspend",
449 "normal resume",
450 "critical resume",
451 "low battery",
452 "power status change",
453 "update time",
454 "critical suspend",
455 "user standby",
456 "user suspend",
457 "system standby resume",
458 "capabilities change"
459};
460#define NR_APM_EVENT_NAME ARRAY_SIZE(apm_event_name)
461
462typedef struct lookup_t {
463 int key;
464 char *msg;
465} lookup_t;
466
467
468
469
470
471
472static const lookup_t error_table[] = {
473
474 { APM_DISABLED, "Power management disabled" },
475 { APM_CONNECTED, "Real mode interface already connected" },
476 { APM_NOT_CONNECTED, "Interface not connected" },
477 { APM_16_CONNECTED, "16 bit interface already connected" },
478
479 { APM_32_CONNECTED, "32 bit interface already connected" },
480 { APM_32_UNSUPPORTED, "32 bit interface not supported" },
481 { APM_BAD_DEVICE, "Unrecognized device ID" },
482 { APM_BAD_PARAM, "Parameter out of range" },
483 { APM_NOT_ENGAGED, "Interface not engaged" },
484 { APM_BAD_FUNCTION, "Function not supported" },
485 { APM_RESUME_DISABLED, "Resume timer disabled" },
486 { APM_BAD_STATE, "Unable to enter requested state" },
487
488 { APM_NO_ERROR, "BIOS did not set a return code" },
489 { APM_NOT_PRESENT, "No APM present" }
490};
491#define ERROR_COUNT ARRAY_SIZE(error_table)
492
493
494
495
496
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498
499
500
501
502static void apm_error(char *str, int err)
503{
504 int i;
505
506 for (i = 0; i < ERROR_COUNT; i++)
507 if (error_table[i].key == err)
508 break;
509 if (i < ERROR_COUNT)
510 pr_notice("%s: %s\n", str, error_table[i].msg);
511 else if (err < 0)
512 pr_notice("%s: linux error code %i\n", str, err);
513 else
514 pr_notice("%s: unknown error code %#2.2x\n",
515 str, err);
516}
517
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532
533
534
535static inline unsigned long __apm_irq_save(void)
536{
537 unsigned long flags;
538 local_save_flags(flags);
539 if (apm_info.allow_ints) {
540 if (irqs_disabled_flags(flags))
541 local_irq_enable();
542 } else
543 local_irq_disable();
544
545 return flags;
546}
547
548#define apm_irq_save(flags) \
549 do { flags = __apm_irq_save(); } while (0)
550
551static inline void apm_irq_restore(unsigned long flags)
552{
553 if (irqs_disabled_flags(flags))
554 local_irq_disable();
555 else if (irqs_disabled())
556 local_irq_enable();
557}
558
559#ifdef APM_ZERO_SEGS
560# define APM_DECL_SEGS \
561 unsigned int saved_fs; unsigned int saved_gs;
562# define APM_DO_SAVE_SEGS \
563 savesegment(fs, saved_fs); savesegment(gs, saved_gs)
564# define APM_DO_RESTORE_SEGS \
565 loadsegment(fs, saved_fs); loadsegment(gs, saved_gs)
566#else
567# define APM_DECL_SEGS
568# define APM_DO_SAVE_SEGS
569# define APM_DO_RESTORE_SEGS
570#endif
571
572struct apm_bios_call {
573 u32 func;
574
575 u32 ebx;
576 u32 ecx;
577
578 u32 eax;
579 u32 edx;
580 u32 esi;
581
582
583 int err;
584};
585
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599
600static long __apm_bios_call(void *_call)
601{
602 APM_DECL_SEGS
603 unsigned long flags;
604 int cpu;
605 struct desc_struct save_desc_40;
606 struct desc_struct *gdt;
607 struct apm_bios_call *call = _call;
608
609 cpu = get_cpu();
610 BUG_ON(cpu != 0);
611 gdt = get_cpu_gdt_table(cpu);
612 save_desc_40 = gdt[0x40 / 8];
613 gdt[0x40 / 8] = bad_bios_desc;
614
615 apm_irq_save(flags);
616 APM_DO_SAVE_SEGS;
617 apm_bios_call_asm(call->func, call->ebx, call->ecx,
618 &call->eax, &call->ebx, &call->ecx, &call->edx,
619 &call->esi);
620 APM_DO_RESTORE_SEGS;
621 apm_irq_restore(flags);
622 gdt[0x40 / 8] = save_desc_40;
623 put_cpu();
624
625 return call->eax & 0xff;
626}
627
628
629static int on_cpu0(long (*fn)(void *), struct apm_bios_call *call)
630{
631 int ret;
632
633
634
635 if (get_cpu() == 0) {
636 ret = fn(call);
637 put_cpu();
638 } else {
639 put_cpu();
640 ret = work_on_cpu(0, fn, call);
641 }
642
643
644 if (ret < 0)
645 call->err = ret;
646 else
647 call->err = (call->eax >> 8) & 0xff;
648
649 return ret;
650}
651
652
653
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655
656
657
658static int apm_bios_call(struct apm_bios_call *call)
659{
660 return on_cpu0(__apm_bios_call, call);
661}
662
663
664
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673
674
675static long __apm_bios_call_simple(void *_call)
676{
677 u8 error;
678 APM_DECL_SEGS
679 unsigned long flags;
680 int cpu;
681 struct desc_struct save_desc_40;
682 struct desc_struct *gdt;
683 struct apm_bios_call *call = _call;
684
685 cpu = get_cpu();
686 BUG_ON(cpu != 0);
687 gdt = get_cpu_gdt_table(cpu);
688 save_desc_40 = gdt[0x40 / 8];
689 gdt[0x40 / 8] = bad_bios_desc;
690
691 apm_irq_save(flags);
692 APM_DO_SAVE_SEGS;
693 error = apm_bios_call_simple_asm(call->func, call->ebx, call->ecx,
694 &call->eax);
695 APM_DO_RESTORE_SEGS;
696 apm_irq_restore(flags);
697 gdt[0x40 / 8] = save_desc_40;
698 put_cpu();
699 return error;
700}
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715
716static int apm_bios_call_simple(u32 func, u32 ebx_in, u32 ecx_in, u32 *eax,
717 int *err)
718{
719 struct apm_bios_call call;
720 int ret;
721
722 call.func = func;
723 call.ebx = ebx_in;
724 call.ecx = ecx_in;
725
726 ret = on_cpu0(__apm_bios_call_simple, &call);
727 *eax = call.eax;
728 *err = call.err;
729 return ret;
730}
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746
747
748static int apm_driver_version(u_short *val)
749{
750 u32 eax;
751 int err;
752
753 if (apm_bios_call_simple(APM_FUNC_VERSION, 0, *val, &eax, &err))
754 return err;
755 *val = eax;
756 return APM_SUCCESS;
757}
758
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775static int apm_get_event(apm_event_t *event, apm_eventinfo_t *info)
776{
777 struct apm_bios_call call;
778
779 call.func = APM_FUNC_GET_EVENT;
780 call.ebx = call.ecx = 0;
781
782 if (apm_bios_call(&call))
783 return call.err;
784
785 *event = call.ebx;
786 if (apm_info.connection_version < 0x0102)
787 *info = ~0;
788 else
789 *info = call.ecx;
790 return APM_SUCCESS;
791}
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807static int set_power_state(u_short what, u_short state)
808{
809 u32 eax;
810 int err;
811
812 if (apm_bios_call_simple(APM_FUNC_SET_STATE, what, state, &eax, &err))
813 return err;
814 return APM_SUCCESS;
815}
816
817
818
819
820
821
822
823
824static int set_system_power_state(u_short state)
825{
826 return set_power_state(APM_DEVICE_ALL, state);
827}
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829
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831
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834
835
836
837
838static int apm_do_idle(void)
839{
840 u32 eax;
841 u8 ret = 0;
842 int idled = 0;
843 int err = 0;
844
845 if (!need_resched()) {
846 idled = 1;
847 ret = apm_bios_call_simple(APM_FUNC_IDLE, 0, 0, &eax, &err);
848 }
849
850 if (!idled)
851 return 0;
852
853 if (ret) {
854 static unsigned long t;
855
856
857
858
859 if (++t < 5) {
860 printk(KERN_DEBUG "apm_do_idle failed (%d)\n", err);
861 t = jiffies;
862 }
863 return -1;
864 }
865 clock_slowed = (apm_info.bios.flags & APM_IDLE_SLOWS_CLOCK) != 0;
866 return clock_slowed;
867}
868
869
870
871
872
873
874
875static void apm_do_busy(void)
876{
877 u32 dummy;
878 int err;
879
880 if (clock_slowed || ALWAYS_CALL_BUSY) {
881 (void)apm_bios_call_simple(APM_FUNC_BUSY, 0, 0, &dummy, &err);
882 clock_slowed = 0;
883 }
884}
885
886
887
888
889
890
891
892#define IDLE_CALC_LIMIT (HZ * 100)
893#define IDLE_LEAKY_MAX 16
894
895
896
897
898
899
900
901
902
903static int apm_cpu_idle(struct cpuidle_device *dev,
904 struct cpuidle_driver *drv, int index)
905{
906 static int use_apm_idle;
907 static unsigned int last_jiffies;
908 static unsigned int last_stime;
909 cputime_t stime;
910
911 int apm_idle_done = 0;
912 unsigned int jiffies_since_last_check = jiffies - last_jiffies;
913 unsigned int bucket;
914
915recalc:
916 task_cputime(current, NULL, &stime);
917 if (jiffies_since_last_check > IDLE_CALC_LIMIT) {
918 use_apm_idle = 0;
919 } else if (jiffies_since_last_check > idle_period) {
920 unsigned int idle_percentage;
921
922 idle_percentage = cputime_to_jiffies(stime - last_stime);
923 idle_percentage *= 100;
924 idle_percentage /= jiffies_since_last_check;
925 use_apm_idle = (idle_percentage > idle_threshold);
926 if (apm_info.forbid_idle)
927 use_apm_idle = 0;
928 }
929
930 last_jiffies = jiffies;
931 last_stime = stime;
932
933 bucket = IDLE_LEAKY_MAX;
934
935 while (!need_resched()) {
936 if (use_apm_idle) {
937 unsigned int t;
938
939 t = jiffies;
940 switch (apm_do_idle()) {
941 case 0:
942 apm_idle_done = 1;
943 if (t != jiffies) {
944 if (bucket) {
945 bucket = IDLE_LEAKY_MAX;
946 continue;
947 }
948 } else if (bucket) {
949 bucket--;
950 continue;
951 }
952 break;
953 case 1:
954 apm_idle_done = 1;
955 break;
956 default:
957 break;
958 }
959 }
960 default_idle();
961 local_irq_disable();
962 jiffies_since_last_check = jiffies - last_jiffies;
963 if (jiffies_since_last_check > idle_period)
964 goto recalc;
965 }
966
967 if (apm_idle_done)
968 apm_do_busy();
969
970 return index;
971}
972
973
974
975
976
977
978
979
980
981
982
983static void apm_power_off(void)
984{
985
986 if (apm_info.realmode_power_off) {
987 set_cpus_allowed_ptr(current, cpumask_of(0));
988 machine_real_restart(MRR_APM);
989 } else {
990 (void)set_system_power_state(APM_STATE_OFF);
991 }
992}
993
994#ifdef CONFIG_APM_DO_ENABLE
995
996
997
998
999
1000
1001
1002
1003static int apm_enable_power_management(int enable)
1004{
1005 u32 eax;
1006 int err;
1007
1008 if ((enable == 0) && (apm_info.bios.flags & APM_BIOS_DISENGAGED))
1009 return APM_NOT_ENGAGED;
1010 if (apm_bios_call_simple(APM_FUNC_ENABLE_PM, APM_DEVICE_BALL,
1011 enable, &eax, &err))
1012 return err;
1013 if (enable)
1014 apm_info.bios.flags &= ~APM_BIOS_DISABLED;
1015 else
1016 apm_info.bios.flags |= APM_BIOS_DISABLED;
1017 return APM_SUCCESS;
1018}
1019#endif
1020
1021
1022
1023
1024
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1031
1032
1033
1034
1035static int apm_get_power_status(u_short *status, u_short *bat, u_short *life)
1036{
1037 struct apm_bios_call call;
1038
1039 call.func = APM_FUNC_GET_STATUS;
1040 call.ebx = APM_DEVICE_ALL;
1041 call.ecx = 0;
1042
1043 if (apm_info.get_power_status_broken)
1044 return APM_32_UNSUPPORTED;
1045 if (apm_bios_call(&call))
1046 return call.err;
1047 *status = call.ebx;
1048 *bat = call.ecx;
1049 if (apm_info.get_power_status_swabinminutes) {
1050 *life = swab16((u16)call.edx);
1051 *life |= 0x8000;
1052 } else
1053 *life = call.edx;
1054 return APM_SUCCESS;
1055}
1056
1057#if 0
1058static int apm_get_battery_status(u_short which, u_short *status,
1059 u_short *bat, u_short *life, u_short *nbat)
1060{
1061 u32 eax;
1062 u32 ebx;
1063 u32 ecx;
1064 u32 edx;
1065 u32 esi;
1066
1067 if (apm_info.connection_version < 0x0102) {
1068
1069 if (which != 1)
1070 return APM_BAD_DEVICE;
1071 *nbat = 1;
1072 return apm_get_power_status(status, bat, life);
1073 }
1074
1075 if (apm_bios_call(APM_FUNC_GET_STATUS, (0x8000 | (which)), 0, &eax,
1076 &ebx, &ecx, &edx, &esi))
1077 return (eax >> 8) & 0xff;
1078 *status = ebx;
1079 *bat = ecx;
1080 *life = edx;
1081 *nbat = esi;
1082 return APM_SUCCESS;
1083}
1084#endif
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095static int apm_engage_power_management(u_short device, int enable)
1096{
1097 u32 eax;
1098 int err;
1099
1100 if ((enable == 0) && (device == APM_DEVICE_ALL)
1101 && (apm_info.bios.flags & APM_BIOS_DISABLED))
1102 return APM_DISABLED;
1103 if (apm_bios_call_simple(APM_FUNC_ENGAGE_PM, device, enable,
1104 &eax, &err))
1105 return err;
1106 if (device == APM_DEVICE_ALL) {
1107 if (enable)
1108 apm_info.bios.flags &= ~APM_BIOS_DISENGAGED;
1109 else
1110 apm_info.bios.flags |= APM_BIOS_DISENGAGED;
1111 }
1112 return APM_SUCCESS;
1113}
1114
1115#if defined(CONFIG_APM_DISPLAY_BLANK) && defined(CONFIG_VT)
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127static int apm_console_blank(int blank)
1128{
1129 int error = APM_NOT_ENGAGED;
1130 int i;
1131 u_short state;
1132 static const u_short dev[3] = { 0x100, 0x1FF, 0x101 };
1133
1134 state = blank ? APM_STATE_STANDBY : APM_STATE_READY;
1135
1136 for (i = 0; i < ARRAY_SIZE(dev); i++) {
1137 error = set_power_state(dev[i], state);
1138
1139 if ((error == APM_SUCCESS) || (error == APM_NO_ERROR))
1140 return 1;
1141
1142 if (error == APM_NOT_ENGAGED)
1143 break;
1144 }
1145
1146 if (error == APM_NOT_ENGAGED) {
1147 static int tried;
1148 int eng_error;
1149 if (tried++ == 0) {
1150 eng_error = apm_engage_power_management(APM_DEVICE_ALL, 1);
1151 if (eng_error) {
1152 apm_error("set display", error);
1153 apm_error("engage interface", eng_error);
1154 return 0;
1155 } else
1156 return apm_console_blank(blank);
1157 }
1158 }
1159 apm_error("set display", error);
1160 return 0;
1161}
1162#endif
1163
1164static int queue_empty(struct apm_user *as)
1165{
1166 return as->event_head == as->event_tail;
1167}
1168
1169static apm_event_t get_queued_event(struct apm_user *as)
1170{
1171 if (++as->event_tail >= APM_MAX_EVENTS)
1172 as->event_tail = 0;
1173 return as->events[as->event_tail];
1174}
1175
1176static void queue_event(apm_event_t event, struct apm_user *sender)
1177{
1178 struct apm_user *as;
1179
1180 spin_lock(&user_list_lock);
1181 if (user_list == NULL)
1182 goto out;
1183 for (as = user_list; as != NULL; as = as->next) {
1184 if ((as == sender) || (!as->reader))
1185 continue;
1186 if (++as->event_head >= APM_MAX_EVENTS)
1187 as->event_head = 0;
1188
1189 if (as->event_head == as->event_tail) {
1190 static int notified;
1191
1192 if (notified++ == 0)
1193 pr_err("an event queue overflowed\n");
1194 if (++as->event_tail >= APM_MAX_EVENTS)
1195 as->event_tail = 0;
1196 }
1197 as->events[as->event_head] = event;
1198 if (!as->suser || !as->writer)
1199 continue;
1200 switch (event) {
1201 case APM_SYS_SUSPEND:
1202 case APM_USER_SUSPEND:
1203 as->suspends_pending++;
1204 suspends_pending++;
1205 break;
1206
1207 case APM_SYS_STANDBY:
1208 case APM_USER_STANDBY:
1209 as->standbys_pending++;
1210 standbys_pending++;
1211 break;
1212 }
1213 }
1214 wake_up_interruptible(&apm_waitqueue);
1215out:
1216 spin_unlock(&user_list_lock);
1217}
1218
1219static void reinit_timer(void)
1220{
1221#ifdef INIT_TIMER_AFTER_SUSPEND
1222 unsigned long flags;
1223
1224 raw_spin_lock_irqsave(&i8253_lock, flags);
1225
1226 outb_p(0x34, PIT_MODE);
1227 udelay(10);
1228 outb_p(LATCH & 0xff, PIT_CH0);
1229 udelay(10);
1230 outb_p(LATCH >> 8, PIT_CH0);
1231 udelay(10);
1232 raw_spin_unlock_irqrestore(&i8253_lock, flags);
1233#endif
1234}
1235
1236static int suspend(int vetoable)
1237{
1238 int err;
1239 struct apm_user *as;
1240
1241 dpm_suspend_start(PMSG_SUSPEND);
1242 dpm_suspend_end(PMSG_SUSPEND);
1243
1244 local_irq_disable();
1245 syscore_suspend();
1246
1247 local_irq_enable();
1248
1249 save_processor_state();
1250 err = set_system_power_state(APM_STATE_SUSPEND);
1251 ignore_normal_resume = 1;
1252 restore_processor_state();
1253
1254 local_irq_disable();
1255 reinit_timer();
1256
1257 if (err == APM_NO_ERROR)
1258 err = APM_SUCCESS;
1259 if (err != APM_SUCCESS)
1260 apm_error("suspend", err);
1261 err = (err == APM_SUCCESS) ? 0 : -EIO;
1262
1263 syscore_resume();
1264 local_irq_enable();
1265
1266 dpm_resume_start(PMSG_RESUME);
1267 dpm_resume_end(PMSG_RESUME);
1268
1269 queue_event(APM_NORMAL_RESUME, NULL);
1270 spin_lock(&user_list_lock);
1271 for (as = user_list; as != NULL; as = as->next) {
1272 as->suspend_wait = 0;
1273 as->suspend_result = err;
1274 }
1275 spin_unlock(&user_list_lock);
1276 wake_up_interruptible(&apm_suspend_waitqueue);
1277 return err;
1278}
1279
1280static void standby(void)
1281{
1282 int err;
1283
1284 dpm_suspend_end(PMSG_SUSPEND);
1285
1286 local_irq_disable();
1287 syscore_suspend();
1288 local_irq_enable();
1289
1290 err = set_system_power_state(APM_STATE_STANDBY);
1291 if ((err != APM_SUCCESS) && (err != APM_NO_ERROR))
1292 apm_error("standby", err);
1293
1294 local_irq_disable();
1295 syscore_resume();
1296 local_irq_enable();
1297
1298 dpm_resume_start(PMSG_RESUME);
1299}
1300
1301static apm_event_t get_event(void)
1302{
1303 int error;
1304 apm_event_t event = APM_NO_EVENTS;
1305 apm_eventinfo_t info;
1306
1307 static int notified;
1308
1309
1310 error = apm_get_event(&event, &info);
1311 if (error == APM_SUCCESS)
1312 return event;
1313
1314 if ((error != APM_NO_EVENTS) && (notified++ == 0))
1315 apm_error("get_event", error);
1316
1317 return 0;
1318}
1319
1320static void check_events(void)
1321{
1322 apm_event_t event;
1323 static unsigned long last_resume;
1324 static int ignore_bounce;
1325
1326 while ((event = get_event()) != 0) {
1327 if (debug) {
1328 if (event <= NR_APM_EVENT_NAME)
1329 printk(KERN_DEBUG "apm: received %s notify\n",
1330 apm_event_name[event - 1]);
1331 else
1332 printk(KERN_DEBUG "apm: received unknown "
1333 "event 0x%02x\n", event);
1334 }
1335 if (ignore_bounce
1336 && (time_after(jiffies, last_resume + bounce_interval)))
1337 ignore_bounce = 0;
1338
1339 switch (event) {
1340 case APM_SYS_STANDBY:
1341 case APM_USER_STANDBY:
1342 queue_event(event, NULL);
1343 if (standbys_pending <= 0)
1344 standby();
1345 break;
1346
1347 case APM_USER_SUSPEND:
1348#ifdef CONFIG_APM_IGNORE_USER_SUSPEND
1349 if (apm_info.connection_version > 0x100)
1350 set_system_power_state(APM_STATE_REJECT);
1351 break;
1352#endif
1353 case APM_SYS_SUSPEND:
1354 if (ignore_bounce) {
1355 if (apm_info.connection_version > 0x100)
1356 set_system_power_state(APM_STATE_REJECT);
1357 break;
1358 }
1359
1360
1361
1362
1363
1364
1365
1366
1367 if (ignore_sys_suspend)
1368 return;
1369 ignore_sys_suspend = 1;
1370 queue_event(event, NULL);
1371 if (suspends_pending <= 0)
1372 (void) suspend(1);
1373 break;
1374
1375 case APM_NORMAL_RESUME:
1376 case APM_CRITICAL_RESUME:
1377 case APM_STANDBY_RESUME:
1378 ignore_sys_suspend = 0;
1379 last_resume = jiffies;
1380 ignore_bounce = 1;
1381 if ((event != APM_NORMAL_RESUME)
1382 || (ignore_normal_resume == 0)) {
1383 dpm_resume_end(PMSG_RESUME);
1384 queue_event(event, NULL);
1385 }
1386 ignore_normal_resume = 0;
1387 break;
1388
1389 case APM_CAPABILITY_CHANGE:
1390 case APM_LOW_BATTERY:
1391 case APM_POWER_STATUS_CHANGE:
1392 queue_event(event, NULL);
1393
1394 break;
1395
1396 case APM_UPDATE_TIME:
1397 break;
1398
1399 case APM_CRITICAL_SUSPEND:
1400
1401
1402
1403 (void)suspend(0);
1404 break;
1405 }
1406 }
1407}
1408
1409static void apm_event_handler(void)
1410{
1411 static int pending_count = 4;
1412 int err;
1413
1414 if ((standbys_pending > 0) || (suspends_pending > 0)) {
1415 if ((apm_info.connection_version > 0x100) &&
1416 (pending_count-- <= 0)) {
1417 pending_count = 4;
1418 if (debug)
1419 printk(KERN_DEBUG "apm: setting state busy\n");
1420 err = set_system_power_state(APM_STATE_BUSY);
1421 if (err)
1422 apm_error("busy", err);
1423 }
1424 } else
1425 pending_count = 4;
1426 check_events();
1427}
1428
1429
1430
1431
1432
1433static void apm_mainloop(void)
1434{
1435 DECLARE_WAITQUEUE(wait, current);
1436
1437 add_wait_queue(&apm_waitqueue, &wait);
1438 set_current_state(TASK_INTERRUPTIBLE);
1439 for (;;) {
1440 schedule_timeout(APM_CHECK_TIMEOUT);
1441 if (kthread_should_stop())
1442 break;
1443
1444
1445
1446
1447 set_current_state(TASK_INTERRUPTIBLE);
1448 apm_event_handler();
1449 }
1450 remove_wait_queue(&apm_waitqueue, &wait);
1451}
1452
1453static int check_apm_user(struct apm_user *as, const char *func)
1454{
1455 if (as == NULL || as->magic != APM_BIOS_MAGIC) {
1456 pr_err("%s passed bad filp\n", func);
1457 return 1;
1458 }
1459 return 0;
1460}
1461
1462static ssize_t do_read(struct file *fp, char __user *buf, size_t count, loff_t *ppos)
1463{
1464 struct apm_user *as;
1465 int i;
1466 apm_event_t event;
1467
1468 as = fp->private_data;
1469 if (check_apm_user(as, "read"))
1470 return -EIO;
1471 if ((int)count < sizeof(apm_event_t))
1472 return -EINVAL;
1473 if ((queue_empty(as)) && (fp->f_flags & O_NONBLOCK))
1474 return -EAGAIN;
1475 wait_event_interruptible(apm_waitqueue, !queue_empty(as));
1476 i = count;
1477 while ((i >= sizeof(event)) && !queue_empty(as)) {
1478 event = get_queued_event(as);
1479 if (copy_to_user(buf, &event, sizeof(event))) {
1480 if (i < count)
1481 break;
1482 return -EFAULT;
1483 }
1484 switch (event) {
1485 case APM_SYS_SUSPEND:
1486 case APM_USER_SUSPEND:
1487 as->suspends_read++;
1488 break;
1489
1490 case APM_SYS_STANDBY:
1491 case APM_USER_STANDBY:
1492 as->standbys_read++;
1493 break;
1494 }
1495 buf += sizeof(event);
1496 i -= sizeof(event);
1497 }
1498 if (i < count)
1499 return count - i;
1500 if (signal_pending(current))
1501 return -ERESTARTSYS;
1502 return 0;
1503}
1504
1505static unsigned int do_poll(struct file *fp, poll_table *wait)
1506{
1507 struct apm_user *as;
1508
1509 as = fp->private_data;
1510 if (check_apm_user(as, "poll"))
1511 return 0;
1512 poll_wait(fp, &apm_waitqueue, wait);
1513 if (!queue_empty(as))
1514 return POLLIN | POLLRDNORM;
1515 return 0;
1516}
1517
1518static long do_ioctl(struct file *filp, u_int cmd, u_long arg)
1519{
1520 struct apm_user *as;
1521 int ret;
1522
1523 as = filp->private_data;
1524 if (check_apm_user(as, "ioctl"))
1525 return -EIO;
1526 if (!as->suser || !as->writer)
1527 return -EPERM;
1528 switch (cmd) {
1529 case APM_IOC_STANDBY:
1530 mutex_lock(&apm_mutex);
1531 if (as->standbys_read > 0) {
1532 as->standbys_read--;
1533 as->standbys_pending--;
1534 standbys_pending--;
1535 } else
1536 queue_event(APM_USER_STANDBY, as);
1537 if (standbys_pending <= 0)
1538 standby();
1539 mutex_unlock(&apm_mutex);
1540 break;
1541 case APM_IOC_SUSPEND:
1542 mutex_lock(&apm_mutex);
1543 if (as->suspends_read > 0) {
1544 as->suspends_read--;
1545 as->suspends_pending--;
1546 suspends_pending--;
1547 } else
1548 queue_event(APM_USER_SUSPEND, as);
1549 if (suspends_pending <= 0) {
1550 ret = suspend(1);
1551 mutex_unlock(&apm_mutex);
1552 } else {
1553 as->suspend_wait = 1;
1554 mutex_unlock(&apm_mutex);
1555 wait_event_interruptible(apm_suspend_waitqueue,
1556 as->suspend_wait == 0);
1557 ret = as->suspend_result;
1558 }
1559 return ret;
1560 default:
1561 return -ENOTTY;
1562 }
1563 return 0;
1564}
1565
1566static int do_release(struct inode *inode, struct file *filp)
1567{
1568 struct apm_user *as;
1569
1570 as = filp->private_data;
1571 if (check_apm_user(as, "release"))
1572 return 0;
1573 filp->private_data = NULL;
1574 if (as->standbys_pending > 0) {
1575 standbys_pending -= as->standbys_pending;
1576 if (standbys_pending <= 0)
1577 standby();
1578 }
1579 if (as->suspends_pending > 0) {
1580 suspends_pending -= as->suspends_pending;
1581 if (suspends_pending <= 0)
1582 (void) suspend(1);
1583 }
1584 spin_lock(&user_list_lock);
1585 if (user_list == as)
1586 user_list = as->next;
1587 else {
1588 struct apm_user *as1;
1589
1590 for (as1 = user_list;
1591 (as1 != NULL) && (as1->next != as);
1592 as1 = as1->next)
1593 ;
1594 if (as1 == NULL)
1595 pr_err("filp not in user list\n");
1596 else
1597 as1->next = as->next;
1598 }
1599 spin_unlock(&user_list_lock);
1600 kfree(as);
1601 return 0;
1602}
1603
1604static int do_open(struct inode *inode, struct file *filp)
1605{
1606 struct apm_user *as;
1607
1608 as = kmalloc(sizeof(*as), GFP_KERNEL);
1609 if (as == NULL)
1610 return -ENOMEM;
1611
1612 as->magic = APM_BIOS_MAGIC;
1613 as->event_tail = as->event_head = 0;
1614 as->suspends_pending = as->standbys_pending = 0;
1615 as->suspends_read = as->standbys_read = 0;
1616
1617
1618
1619
1620
1621
1622
1623 as->suser = capable(CAP_SYS_ADMIN);
1624 as->writer = (filp->f_mode & FMODE_WRITE) == FMODE_WRITE;
1625 as->reader = (filp->f_mode & FMODE_READ) == FMODE_READ;
1626 spin_lock(&user_list_lock);
1627 as->next = user_list;
1628 user_list = as;
1629 spin_unlock(&user_list_lock);
1630 filp->private_data = as;
1631 return 0;
1632}
1633
1634static int proc_apm_show(struct seq_file *m, void *v)
1635{
1636 unsigned short bx;
1637 unsigned short cx;
1638 unsigned short dx;
1639 int error;
1640 unsigned short ac_line_status = 0xff;
1641 unsigned short battery_status = 0xff;
1642 unsigned short battery_flag = 0xff;
1643 int percentage = -1;
1644 int time_units = -1;
1645 char *units = "?";
1646
1647 if ((num_online_cpus() == 1) &&
1648 !(error = apm_get_power_status(&bx, &cx, &dx))) {
1649 ac_line_status = (bx >> 8) & 0xff;
1650 battery_status = bx & 0xff;
1651 if ((cx & 0xff) != 0xff)
1652 percentage = cx & 0xff;
1653
1654 if (apm_info.connection_version > 0x100) {
1655 battery_flag = (cx >> 8) & 0xff;
1656 if (dx != 0xffff) {
1657 units = (dx & 0x8000) ? "min" : "sec";
1658 time_units = dx & 0x7fff;
1659 }
1660 }
1661 }
1662
1663
1664
1665
1666
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 seq_printf(m, "%s %d.%d 0x%02x 0x%02x 0x%02x 0x%02x %d%% %d %s\n",
1701 driver_version,
1702 (apm_info.bios.version >> 8) & 0xff,
1703 apm_info.bios.version & 0xff,
1704 apm_info.bios.flags,
1705 ac_line_status,
1706 battery_status,
1707 battery_flag,
1708 percentage,
1709 time_units,
1710 units);
1711 return 0;
1712}
1713
1714static int proc_apm_open(struct inode *inode, struct file *file)
1715{
1716 return single_open(file, proc_apm_show, NULL);
1717}
1718
1719static const struct file_operations apm_file_ops = {
1720 .owner = THIS_MODULE,
1721 .open = proc_apm_open,
1722 .read = seq_read,
1723 .llseek = seq_lseek,
1724 .release = single_release,
1725};
1726
1727static int apm(void *unused)
1728{
1729 unsigned short bx;
1730 unsigned short cx;
1731 unsigned short dx;
1732 int error;
1733 char *power_stat;
1734 char *bat_stat;
1735
1736
1737
1738
1739
1740
1741
1742 set_cpus_allowed_ptr(current, cpumask_of(0));
1743 BUG_ON(smp_processor_id() != 0);
1744
1745 if (apm_info.connection_version == 0) {
1746 apm_info.connection_version = apm_info.bios.version;
1747 if (apm_info.connection_version > 0x100) {
1748
1749
1750
1751 if (apm_info.connection_version > 0x0102)
1752 apm_info.connection_version = 0x0102;
1753 error = apm_driver_version(&apm_info.connection_version);
1754 if (error != APM_SUCCESS) {
1755 apm_error("driver version", error);
1756
1757 apm_info.connection_version = 0x100;
1758 }
1759 }
1760 }
1761
1762 if (debug)
1763 printk(KERN_INFO "apm: Connection version %d.%d\n",
1764 (apm_info.connection_version >> 8) & 0xff,
1765 apm_info.connection_version & 0xff);
1766
1767#ifdef CONFIG_APM_DO_ENABLE
1768 if (apm_info.bios.flags & APM_BIOS_DISABLED) {
1769
1770
1771
1772
1773
1774 error = apm_enable_power_management(1);
1775 if (error) {
1776 apm_error("enable power management", error);
1777 return -1;
1778 }
1779 }
1780#endif
1781
1782 if ((apm_info.bios.flags & APM_BIOS_DISENGAGED)
1783 && (apm_info.connection_version > 0x0100)) {
1784 error = apm_engage_power_management(APM_DEVICE_ALL, 1);
1785 if (error) {
1786 apm_error("engage power management", error);
1787 return -1;
1788 }
1789 }
1790
1791 if (debug && (num_online_cpus() == 1 || smp)) {
1792 error = apm_get_power_status(&bx, &cx, &dx);
1793 if (error)
1794 printk(KERN_INFO "apm: power status not available\n");
1795 else {
1796 switch ((bx >> 8) & 0xff) {
1797 case 0:
1798 power_stat = "off line";
1799 break;
1800 case 1:
1801 power_stat = "on line";
1802 break;
1803 case 2:
1804 power_stat = "on backup power";
1805 break;
1806 default:
1807 power_stat = "unknown";
1808 break;
1809 }
1810 switch (bx & 0xff) {
1811 case 0:
1812 bat_stat = "high";
1813 break;
1814 case 1:
1815 bat_stat = "low";
1816 break;
1817 case 2:
1818 bat_stat = "critical";
1819 break;
1820 case 3:
1821 bat_stat = "charging";
1822 break;
1823 default:
1824 bat_stat = "unknown";
1825 break;
1826 }
1827 printk(KERN_INFO
1828 "apm: AC %s, battery status %s, battery life ",
1829 power_stat, bat_stat);
1830 if ((cx & 0xff) == 0xff)
1831 printk("unknown\n");
1832 else
1833 printk("%d%%\n", cx & 0xff);
1834 if (apm_info.connection_version > 0x100) {
1835 printk(KERN_INFO
1836 "apm: battery flag 0x%02x, battery life ",
1837 (cx >> 8) & 0xff);
1838 if (dx == 0xffff)
1839 printk("unknown\n");
1840 else
1841 printk("%d %s\n", dx & 0x7fff,
1842 (dx & 0x8000) ?
1843 "minutes" : "seconds");
1844 }
1845 }
1846 }
1847
1848
1849 if (power_off)
1850 pm_power_off = apm_power_off;
1851
1852 if (num_online_cpus() == 1 || smp) {
1853#if defined(CONFIG_APM_DISPLAY_BLANK) && defined(CONFIG_VT)
1854 console_blank_hook = apm_console_blank;
1855#endif
1856 apm_mainloop();
1857#if defined(CONFIG_APM_DISPLAY_BLANK) && defined(CONFIG_VT)
1858 console_blank_hook = NULL;
1859#endif
1860 }
1861
1862 return 0;
1863}
1864
1865#ifndef MODULE
1866static int __init apm_setup(char *str)
1867{
1868 int invert;
1869
1870 while ((str != NULL) && (*str != '\0')) {
1871 if (strncmp(str, "off", 3) == 0)
1872 apm_disabled = 1;
1873 if (strncmp(str, "on", 2) == 0)
1874 apm_disabled = 0;
1875 if ((strncmp(str, "bounce-interval=", 16) == 0) ||
1876 (strncmp(str, "bounce_interval=", 16) == 0))
1877 bounce_interval = simple_strtol(str + 16, NULL, 0);
1878 if ((strncmp(str, "idle-threshold=", 15) == 0) ||
1879 (strncmp(str, "idle_threshold=", 15) == 0))
1880 idle_threshold = simple_strtol(str + 15, NULL, 0);
1881 if ((strncmp(str, "idle-period=", 12) == 0) ||
1882 (strncmp(str, "idle_period=", 12) == 0))
1883 idle_period = simple_strtol(str + 12, NULL, 0);
1884 invert = (strncmp(str, "no-", 3) == 0) ||
1885 (strncmp(str, "no_", 3) == 0);
1886 if (invert)
1887 str += 3;
1888 if (strncmp(str, "debug", 5) == 0)
1889 debug = !invert;
1890 if ((strncmp(str, "power-off", 9) == 0) ||
1891 (strncmp(str, "power_off", 9) == 0))
1892 power_off = !invert;
1893 if (strncmp(str, "smp", 3) == 0) {
1894 smp = !invert;
1895 idle_threshold = 100;
1896 }
1897 if ((strncmp(str, "allow-ints", 10) == 0) ||
1898 (strncmp(str, "allow_ints", 10) == 0))
1899 apm_info.allow_ints = !invert;
1900 if ((strncmp(str, "broken-psr", 10) == 0) ||
1901 (strncmp(str, "broken_psr", 10) == 0))
1902 apm_info.get_power_status_broken = !invert;
1903 if ((strncmp(str, "realmode-power-off", 18) == 0) ||
1904 (strncmp(str, "realmode_power_off", 18) == 0))
1905 apm_info.realmode_power_off = !invert;
1906 str = strchr(str, ',');
1907 if (str != NULL)
1908 str += strspn(str, ", \t");
1909 }
1910 return 1;
1911}
1912
1913__setup("apm=", apm_setup);
1914#endif
1915
1916static const struct file_operations apm_bios_fops = {
1917 .owner = THIS_MODULE,
1918 .read = do_read,
1919 .poll = do_poll,
1920 .unlocked_ioctl = do_ioctl,
1921 .open = do_open,
1922 .release = do_release,
1923 .llseek = noop_llseek,
1924};
1925
1926static struct miscdevice apm_device = {
1927 APM_MINOR_DEV,
1928 "apm_bios",
1929 &apm_bios_fops
1930};
1931
1932
1933
1934static int __init print_if_true(const struct dmi_system_id *d)
1935{
1936 printk("%s\n", d->ident);
1937 return 0;
1938}
1939
1940
1941
1942
1943
1944static int __init broken_ps2_resume(const struct dmi_system_id *d)
1945{
1946 printk(KERN_INFO "%s machine detected. Mousepad Resume Bug "
1947 "workaround hopefully not needed.\n", d->ident);
1948 return 0;
1949}
1950
1951
1952static int __init set_realmode_power_off(const struct dmi_system_id *d)
1953{
1954 if (apm_info.realmode_power_off == 0) {
1955 apm_info.realmode_power_off = 1;
1956 printk(KERN_INFO "%s bios detected. "
1957 "Using realmode poweroff only.\n", d->ident);
1958 }
1959 return 0;
1960}
1961
1962
1963static int __init set_apm_ints(const struct dmi_system_id *d)
1964{
1965 if (apm_info.allow_ints == 0) {
1966 apm_info.allow_ints = 1;
1967 printk(KERN_INFO "%s machine detected. "
1968 "Enabling interrupts during APM calls.\n", d->ident);
1969 }
1970 return 0;
1971}
1972
1973
1974static int __init apm_is_horked(const struct dmi_system_id *d)
1975{
1976 if (apm_info.disabled == 0) {
1977 apm_info.disabled = 1;
1978 printk(KERN_INFO "%s machine detected. "
1979 "Disabling APM.\n", d->ident);
1980 }
1981 return 0;
1982}
1983
1984static int __init apm_is_horked_d850md(const struct dmi_system_id *d)
1985{
1986 if (apm_info.disabled == 0) {
1987 apm_info.disabled = 1;
1988 printk(KERN_INFO "%s machine detected. "
1989 "Disabling APM.\n", d->ident);
1990 printk(KERN_INFO "This bug is fixed in bios P15 which is available for\n");
1991 printk(KERN_INFO "download from support.intel.com\n");
1992 }
1993 return 0;
1994}
1995
1996
1997static int __init apm_likes_to_melt(const struct dmi_system_id *d)
1998{
1999 if (apm_info.forbid_idle == 0) {
2000 apm_info.forbid_idle = 1;
2001 printk(KERN_INFO "%s machine detected. "
2002 "Disabling APM idle calls.\n", d->ident);
2003 }
2004 return 0;
2005}
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
2021
2022static int __init broken_apm_power(const struct dmi_system_id *d)
2023{
2024 apm_info.get_power_status_broken = 1;
2025 printk(KERN_WARNING "BIOS strings suggest APM bugs, "
2026 "disabling power status reporting.\n");
2027 return 0;
2028}
2029
2030
2031
2032
2033
2034static int __init swab_apm_power_in_minutes(const struct dmi_system_id *d)
2035{
2036 apm_info.get_power_status_swabinminutes = 1;
2037 printk(KERN_WARNING "BIOS strings suggest APM reports battery life "
2038 "in minutes and wrong byte order.\n");
2039 return 0;
2040}
2041
2042static struct dmi_system_id __initdata apm_dmi_table[] = {
2043 {
2044 print_if_true,
2045 KERN_WARNING "IBM T23 - BIOS 1.03b+ and controller firmware 1.02+ may be needed for Linux APM.",
2046 { DMI_MATCH(DMI_SYS_VENDOR, "IBM"),
2047 DMI_MATCH(DMI_BIOS_VERSION, "1AET38WW (1.01b)"), },
2048 },
2049 {
2050 broken_ps2_resume, "Dell Latitude C600",
2051 { DMI_MATCH(DMI_SYS_VENDOR, "Dell"),
2052 DMI_MATCH(DMI_PRODUCT_NAME, "Latitude C600"), },
2053 },
2054 {
2055 set_apm_ints, "Dell Latitude",
2056 { DMI_MATCH(DMI_SYS_VENDOR, "Dell Computer Corporation"),
2057 DMI_MATCH(DMI_PRODUCT_NAME, "Latitude C510"), }
2058 },
2059 {
2060 apm_is_horked, "Dell Inspiron 2500",
2061 { DMI_MATCH(DMI_SYS_VENDOR, "Dell Computer Corporation"),
2062 DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 2500"),
2063 DMI_MATCH(DMI_BIOS_VENDOR, "Phoenix Technologies LTD"),
2064 DMI_MATCH(DMI_BIOS_VERSION, "A11"), },
2065 },
2066 {
2067 set_apm_ints, "Dell Inspiron", {
2068 DMI_MATCH(DMI_SYS_VENDOR, "Dell Computer Corporation"),
2069 DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 4000"), },
2070 },
2071 {
2072 broken_apm_power, "Dell Inspiron 5000e",
2073 { DMI_MATCH(DMI_BIOS_VENDOR, "Phoenix Technologies LTD"),
2074 DMI_MATCH(DMI_BIOS_VERSION, "A04"),
2075 DMI_MATCH(DMI_BIOS_DATE, "08/24/2000"), },
2076 },
2077 {
2078 broken_apm_power, "Dell Inspiron 2500",
2079 { DMI_MATCH(DMI_BIOS_VENDOR, "Phoenix Technologies LTD"),
2080 DMI_MATCH(DMI_BIOS_VERSION, "A12"),
2081 DMI_MATCH(DMI_BIOS_DATE, "02/04/2002"), },
2082 },
2083 {
2084 apm_is_horked, "Dell Dimension 4100",
2085 { DMI_MATCH(DMI_SYS_VENDOR, "Dell Computer Corporation"),
2086 DMI_MATCH(DMI_PRODUCT_NAME, "XPS-Z"),
2087 DMI_MATCH(DMI_BIOS_VENDOR, "Intel Corp."),
2088 DMI_MATCH(DMI_BIOS_VERSION, "A11"), },
2089 },
2090 {
2091 set_apm_ints, "Compaq 12XL125",
2092 { DMI_MATCH(DMI_SYS_VENDOR, "Compaq"),
2093 DMI_MATCH(DMI_PRODUCT_NAME, "Compaq PC"),
2094 DMI_MATCH(DMI_BIOS_VENDOR, "Phoenix Technologies LTD"),
2095 DMI_MATCH(DMI_BIOS_VERSION, "4.06"), },
2096 },
2097 {
2098 set_apm_ints, "ASUSTeK",
2099 { DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK Computer Inc."),
2100 DMI_MATCH(DMI_PRODUCT_NAME, "L8400K series Notebook PC"), },
2101 },
2102 {
2103 apm_is_horked, "ABIT KX7-333[R]",
2104 { DMI_MATCH(DMI_BOARD_VENDOR, "ABIT"),
2105 DMI_MATCH(DMI_BOARD_NAME, "VT8367-8233A (KX7-333[R])"), },
2106 },
2107 {
2108 apm_is_horked, "Trigem Delhi3",
2109 { DMI_MATCH(DMI_SYS_VENDOR, "TriGem Computer, Inc"),
2110 DMI_MATCH(DMI_PRODUCT_NAME, "Delhi3"), },
2111 },
2112 {
2113 apm_is_horked, "Fujitsu-Siemens",
2114 { DMI_MATCH(DMI_BIOS_VENDOR, "hoenix/FUJITSU SIEMENS"),
2115 DMI_MATCH(DMI_BIOS_VERSION, "Version1.01"), },
2116 },
2117 {
2118 apm_is_horked_d850md, "Intel D850MD",
2119 { DMI_MATCH(DMI_BIOS_VENDOR, "Intel Corp."),
2120 DMI_MATCH(DMI_BIOS_VERSION, "MV85010A.86A.0016.P07.0201251536"), },
2121 },
2122 {
2123 apm_is_horked, "Intel D810EMO",
2124 { DMI_MATCH(DMI_BIOS_VENDOR, "Intel Corp."),
2125 DMI_MATCH(DMI_BIOS_VERSION, "MO81010A.86A.0008.P04.0004170800"), },
2126 },
2127 {
2128 apm_is_horked, "Dell XPS-Z",
2129 { DMI_MATCH(DMI_BIOS_VENDOR, "Intel Corp."),
2130 DMI_MATCH(DMI_BIOS_VERSION, "A11"),
2131 DMI_MATCH(DMI_PRODUCT_NAME, "XPS-Z"), },
2132 },
2133 {
2134 apm_is_horked, "Sharp PC-PJ/AX",
2135 { DMI_MATCH(DMI_SYS_VENDOR, "SHARP"),
2136 DMI_MATCH(DMI_PRODUCT_NAME, "PC-PJ/AX"),
2137 DMI_MATCH(DMI_BIOS_VENDOR, "SystemSoft"),
2138 DMI_MATCH(DMI_BIOS_VERSION, "Version R2.08"), },
2139 },
2140 {
2141 apm_is_horked, "Dell Inspiron 2500",
2142 { DMI_MATCH(DMI_SYS_VENDOR, "Dell Computer Corporation"),
2143 DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 2500"),
2144 DMI_MATCH(DMI_BIOS_VENDOR, "Phoenix Technologies LTD"),
2145 DMI_MATCH(DMI_BIOS_VERSION, "A11"), },
2146 },
2147 {
2148 apm_likes_to_melt, "Jabil AMD",
2149 { DMI_MATCH(DMI_BIOS_VENDOR, "American Megatrends Inc."),
2150 DMI_MATCH(DMI_BIOS_VERSION, "0AASNP06"), },
2151 },
2152 {
2153 apm_likes_to_melt, "AMI Bios",
2154 { DMI_MATCH(DMI_BIOS_VENDOR, "American Megatrends Inc."),
2155 DMI_MATCH(DMI_BIOS_VERSION, "0AASNP05"), },
2156 },
2157 {
2158 swab_apm_power_in_minutes, "Sony VAIO",
2159 { DMI_MATCH(DMI_BIOS_VENDOR, "Phoenix Technologies LTD"),
2160 DMI_MATCH(DMI_BIOS_VERSION, "R0206H"),
2161 DMI_MATCH(DMI_BIOS_DATE, "08/23/99"), },
2162 },
2163 {
2164 swab_apm_power_in_minutes, "Sony VAIO",
2165 { DMI_MATCH(DMI_BIOS_VENDOR, "Phoenix Technologies LTD"),
2166 DMI_MATCH(DMI_BIOS_VERSION, "W2K06H0"),
2167 DMI_MATCH(DMI_BIOS_DATE, "02/03/00"), },
2168 },
2169 {
2170 swab_apm_power_in_minutes, "Sony VAIO",
2171 { DMI_MATCH(DMI_BIOS_VENDOR, "Phoenix Technologies LTD"),
2172 DMI_MATCH(DMI_BIOS_VERSION, "R0117A0"),
2173 DMI_MATCH(DMI_BIOS_DATE, "04/25/00"), },
2174 },
2175 {
2176 swab_apm_power_in_minutes, "Sony VAIO",
2177 { DMI_MATCH(DMI_BIOS_VENDOR, "Phoenix Technologies LTD"),
2178 DMI_MATCH(DMI_BIOS_VERSION, "R0121Z1"),
2179 DMI_MATCH(DMI_BIOS_DATE, "05/11/00"), },
2180 },
2181 {
2182 swab_apm_power_in_minutes, "Sony VAIO",
2183 { DMI_MATCH(DMI_BIOS_VENDOR, "Phoenix Technologies LTD"),
2184 DMI_MATCH(DMI_BIOS_VERSION, "WME01Z1"),
2185 DMI_MATCH(DMI_BIOS_DATE, "08/11/00"), },
2186 },
2187 {
2188 swab_apm_power_in_minutes, "Sony VAIO",
2189 { DMI_MATCH(DMI_BIOS_VENDOR, "Phoenix Technologies LTD"),
2190 DMI_MATCH(DMI_BIOS_VERSION, "R0206Z3"),
2191 DMI_MATCH(DMI_BIOS_DATE, "12/25/00"), },
2192 },
2193 {
2194 swab_apm_power_in_minutes, "Sony VAIO",
2195 { DMI_MATCH(DMI_BIOS_VENDOR, "Phoenix Technologies LTD"),
2196 DMI_MATCH(DMI_BIOS_VERSION, "R0203D0"),
2197 DMI_MATCH(DMI_BIOS_DATE, "05/12/00"), },
2198 },
2199 {
2200 swab_apm_power_in_minutes, "Sony VAIO",
2201 { DMI_MATCH(DMI_BIOS_VENDOR, "Phoenix Technologies LTD"),
2202 DMI_MATCH(DMI_BIOS_VERSION, "R0203Z3"),
2203 DMI_MATCH(DMI_BIOS_DATE, "08/25/00"), },
2204 },
2205 {
2206 swab_apm_power_in_minutes, "Sony VAIO",
2207 { DMI_MATCH(DMI_BIOS_VENDOR, "Phoenix Technologies LTD"),
2208 DMI_MATCH(DMI_BIOS_VERSION, "R0209Z3"),
2209 DMI_MATCH(DMI_BIOS_DATE, "05/12/01"), },
2210 },
2211 {
2212 swab_apm_power_in_minutes, "Sony VAIO",
2213 { DMI_MATCH(DMI_BIOS_VENDOR, "Phoenix Technologies LTD"),
2214 DMI_MATCH(DMI_BIOS_VERSION, "R0204K2"),
2215 DMI_MATCH(DMI_BIOS_DATE, "08/28/00"), },
2216 },
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, "R0208P1"),
2222 DMI_MATCH(DMI_BIOS_DATE, "11/09/00"), },
2223 },
2224 {
2225 swab_apm_power_in_minutes, "Sony VAIO",
2226 { DMI_MATCH(DMI_BIOS_VENDOR, "Phoenix Technologies LTD"),
2227 DMI_MATCH(DMI_BIOS_VERSION, "R0204P1"),
2228 DMI_MATCH(DMI_BIOS_DATE, "09/12/00"), },
2229 },
2230 {
2231 swab_apm_power_in_minutes, "Sony VAIO",
2232 { DMI_MATCH(DMI_BIOS_VENDOR, "Phoenix Technologies LTD"),
2233 DMI_MATCH(DMI_BIOS_VERSION, "WXPO1Z3"),
2234 DMI_MATCH(DMI_BIOS_DATE, "10/26/01"), },
2235 },
2236 {
2237 set_realmode_power_off, "Award Software v4.60 PGMA",
2238 { DMI_MATCH(DMI_BIOS_VENDOR, "Award Software International, Inc."),
2239 DMI_MATCH(DMI_BIOS_VERSION, "4.60 PGMA"),
2240 DMI_MATCH(DMI_BIOS_DATE, "134526184"), },
2241 },
2242
2243
2244
2245 {
2246 set_apm_ints, "IBM",
2247 { DMI_MATCH(DMI_SYS_VENDOR, "IBM"), },
2248 },
2249
2250 { }
2251};
2252
2253
2254
2255
2256
2257
2258
2259
2260
2261
2262
2263static int __init apm_init(void)
2264{
2265 struct desc_struct *gdt;
2266 int err;
2267
2268 dmi_check_system(apm_dmi_table);
2269
2270 if (apm_info.bios.version == 0 || paravirt_enabled() || machine_is_olpc()) {
2271 printk(KERN_INFO "apm: BIOS not found.\n");
2272 return -ENODEV;
2273 }
2274 printk(KERN_INFO
2275 "apm: BIOS version %d.%d Flags 0x%02x (Driver version %s)\n",
2276 ((apm_info.bios.version >> 8) & 0xff),
2277 (apm_info.bios.version & 0xff),
2278 apm_info.bios.flags,
2279 driver_version);
2280 if ((apm_info.bios.flags & APM_32_BIT_SUPPORT) == 0) {
2281 printk(KERN_INFO "apm: no 32 bit BIOS support\n");
2282 return -ENODEV;
2283 }
2284
2285 if (allow_ints)
2286 apm_info.allow_ints = 1;
2287 if (broken_psr)
2288 apm_info.get_power_status_broken = 1;
2289 if (realmode_power_off)
2290 apm_info.realmode_power_off = 1;
2291
2292 if (apm_disabled != -1)
2293 apm_info.disabled = apm_disabled;
2294
2295
2296
2297
2298
2299 if (apm_info.bios.version == 0x001)
2300 apm_info.bios.version = 0x100;
2301
2302
2303 if (apm_info.bios.version < 0x102)
2304 apm_info.bios.cseg_16_len = 0;
2305
2306 if (debug) {
2307 printk(KERN_INFO "apm: entry %x:%x cseg16 %x dseg %x",
2308 apm_info.bios.cseg, apm_info.bios.offset,
2309 apm_info.bios.cseg_16, apm_info.bios.dseg);
2310 if (apm_info.bios.version > 0x100)
2311 printk(" cseg len %x, dseg len %x",
2312 apm_info.bios.cseg_len,
2313 apm_info.bios.dseg_len);
2314 if (apm_info.bios.version > 0x101)
2315 printk(" cseg16 len %x", apm_info.bios.cseg_16_len);
2316 printk("\n");
2317 }
2318
2319 if (apm_info.disabled) {
2320 pr_notice("disabled on user request.\n");
2321 return -ENODEV;
2322 }
2323 if ((num_online_cpus() > 1) && !power_off && !smp) {
2324 pr_notice("disabled - APM is not SMP safe.\n");
2325 apm_info.disabled = 1;
2326 return -ENODEV;
2327 }
2328 if (!acpi_disabled) {
2329 pr_notice("overridden by ACPI.\n");
2330 apm_info.disabled = 1;
2331 return -ENODEV;
2332 }
2333
2334
2335
2336
2337
2338 apm_bios_entry.offset = apm_info.bios.offset;
2339 apm_bios_entry.segment = APM_CS;
2340
2341
2342
2343
2344
2345
2346
2347
2348
2349
2350
2351 gdt = get_cpu_gdt_table(0);
2352 set_desc_base(&gdt[APM_CS >> 3],
2353 (unsigned long)__va((unsigned long)apm_info.bios.cseg << 4));
2354 set_desc_base(&gdt[APM_CS_16 >> 3],
2355 (unsigned long)__va((unsigned long)apm_info.bios.cseg_16 << 4));
2356 set_desc_base(&gdt[APM_DS >> 3],
2357 (unsigned long)__va((unsigned long)apm_info.bios.dseg << 4));
2358
2359 proc_create("apm", 0, NULL, &apm_file_ops);
2360
2361 kapmd_task = kthread_create(apm, NULL, "kapmd");
2362 if (IS_ERR(kapmd_task)) {
2363 pr_err("disabled - Unable to start kernel thread\n");
2364 err = PTR_ERR(kapmd_task);
2365 kapmd_task = NULL;
2366 remove_proc_entry("apm", NULL);
2367 return err;
2368 }
2369 wake_up_process(kapmd_task);
2370
2371 if (num_online_cpus() > 1 && !smp) {
2372 printk(KERN_NOTICE
2373 "apm: disabled - APM is not SMP safe (power off active).\n");
2374 return 0;
2375 }
2376
2377
2378
2379
2380
2381
2382 if (misc_register(&apm_device))
2383 printk(KERN_WARNING "apm: Could not register misc device.\n");
2384
2385 if (HZ != 100)
2386 idle_period = (idle_period * HZ) / 100;
2387 if (idle_threshold < 100) {
2388 if (!cpuidle_register_driver(&apm_idle_driver))
2389 if (cpuidle_register_device(&apm_cpuidle_device))
2390 cpuidle_unregister_driver(&apm_idle_driver);
2391 }
2392
2393 return 0;
2394}
2395
2396static void __exit apm_exit(void)
2397{
2398 int error;
2399
2400 cpuidle_unregister_device(&apm_cpuidle_device);
2401 cpuidle_unregister_driver(&apm_idle_driver);
2402
2403 if (((apm_info.bios.flags & APM_BIOS_DISENGAGED) == 0)
2404 && (apm_info.connection_version > 0x0100)) {
2405 error = apm_engage_power_management(APM_DEVICE_ALL, 0);
2406 if (error)
2407 apm_error("disengage power management", error);
2408 }
2409 misc_deregister(&apm_device);
2410 remove_proc_entry("apm", NULL);
2411 if (power_off)
2412 pm_power_off = NULL;
2413 if (kapmd_task) {
2414 kthread_stop(kapmd_task);
2415 kapmd_task = NULL;
2416 }
2417}
2418
2419module_init(apm_init);
2420module_exit(apm_exit);
2421
2422MODULE_AUTHOR("Stephen Rothwell");
2423MODULE_DESCRIPTION("Advanced Power Management");
2424MODULE_LICENSE("GPL");
2425module_param(debug, bool, 0644);
2426MODULE_PARM_DESC(debug, "Enable debug mode");
2427module_param(power_off, bool, 0444);
2428MODULE_PARM_DESC(power_off, "Enable power off");
2429module_param(bounce_interval, int, 0444);
2430MODULE_PARM_DESC(bounce_interval,
2431 "Set the number of ticks to ignore suspend bounces");
2432module_param(allow_ints, bool, 0444);
2433MODULE_PARM_DESC(allow_ints, "Allow interrupts during BIOS calls");
2434module_param(broken_psr, bool, 0444);
2435MODULE_PARM_DESC(broken_psr, "BIOS has a broken GetPowerStatus call");
2436module_param(realmode_power_off, bool, 0444);
2437MODULE_PARM_DESC(realmode_power_off,
2438 "Switch to real mode before powering off");
2439module_param(idle_threshold, int, 0444);
2440MODULE_PARM_DESC(idle_threshold,
2441 "System idle percentage above which to make APM BIOS idle calls");
2442module_param(idle_period, int, 0444);
2443MODULE_PARM_DESC(idle_period,
2444 "Period (in sec/100) over which to caculate the idle percentage");
2445module_param(smp, bool, 0444);
2446MODULE_PARM_DESC(smp,
2447 "Set this to enable APM use on an SMP platform. Use with caution on older systems");
2448MODULE_ALIAS_MISCDEV(APM_MINOR_DEV);
2449