172 static int acpi_ec_query(struct acpi_ec *ec, u8 *data);
173 static void advance_transaction(struct acpi_ec *ec);
230 #define ec_dbg_ref(ec, fmt, ...) \  argument
231 	ec_dbg_raw("%lu: " fmt, ec->reference_count, ## __VA_ARGS__)
237 static bool acpi_ec_started(struct acpi_ec *ec)  in acpi_ec_started()  argument
239 	return test_bit(EC_FLAGS_STARTED, &ec->flags) &&  in acpi_ec_started()
240 	       !test_bit(EC_FLAGS_STOPPED, &ec->flags);  in acpi_ec_started()
243 static bool acpi_ec_event_enabled(struct acpi_ec *ec)  in acpi_ec_event_enabled()  argument
250 	if (!test_bit(EC_FLAGS_QUERY_ENABLED, &ec->flags))  in acpi_ec_event_enabled()
262 		return acpi_ec_started(ec);  in acpi_ec_event_enabled()
264 		return test_bit(EC_FLAGS_STARTED, &ec->flags);  in acpi_ec_event_enabled()
267 static bool acpi_ec_flushed(struct acpi_ec *ec)  in acpi_ec_flushed()  argument
269 	return ec->reference_count == 1;  in acpi_ec_flushed()
276 static inline u8 acpi_ec_read_status(struct acpi_ec *ec)  in acpi_ec_read_status()  argument
278 	u8 x = inb(ec->command_addr);  in acpi_ec_read_status()
291 static inline u8 acpi_ec_read_data(struct acpi_ec *ec)  in acpi_ec_read_data()  argument
293 	u8 x = inb(ec->data_addr);  in acpi_ec_read_data()
295 	ec->timestamp = jiffies;  in acpi_ec_read_data()
300 static inline void acpi_ec_write_cmd(struct acpi_ec *ec, u8 command)  in acpi_ec_write_cmd()  argument
303 	outb(command, ec->command_addr);  in acpi_ec_write_cmd()
304 	ec->timestamp = jiffies;  in acpi_ec_write_cmd()
307 static inline void acpi_ec_write_data(struct acpi_ec *ec, u8 data)  in acpi_ec_write_data()  argument
310 	outb(data, ec->data_addr);  in acpi_ec_write_data()
311 	ec->timestamp = jiffies;  in acpi_ec_write_data()
339 static inline bool acpi_ec_is_gpe_raised(struct acpi_ec *ec)  in acpi_ec_is_gpe_raised()  argument
343 	(void)acpi_get_gpe_status(NULL, ec->gpe, &gpe_status);  in acpi_ec_is_gpe_raised()
347 static inline void acpi_ec_enable_gpe(struct acpi_ec *ec, bool open)  in acpi_ec_enable_gpe()  argument
350 		acpi_enable_gpe(NULL, ec->gpe);  in acpi_ec_enable_gpe()
352 		BUG_ON(ec->reference_count < 1);  in acpi_ec_enable_gpe()
353 		acpi_set_gpe(NULL, ec->gpe, ACPI_GPE_ENABLE);  in acpi_ec_enable_gpe()
355 	if (acpi_ec_is_gpe_raised(ec)) {  in acpi_ec_enable_gpe()
362 		advance_transaction(ec);  in acpi_ec_enable_gpe()
366 static inline void acpi_ec_disable_gpe(struct acpi_ec *ec, bool close)  in acpi_ec_disable_gpe()  argument
369 		acpi_disable_gpe(NULL, ec->gpe);  in acpi_ec_disable_gpe()
371 		BUG_ON(ec->reference_count < 1);  in acpi_ec_disable_gpe()
372 		acpi_set_gpe(NULL, ec->gpe, ACPI_GPE_DISABLE);  in acpi_ec_disable_gpe()
376 static inline void acpi_ec_clear_gpe(struct acpi_ec *ec)  in acpi_ec_clear_gpe()  argument
388 	if (!acpi_ec_is_gpe_raised(ec))  in acpi_ec_clear_gpe()
390 	acpi_clear_gpe(NULL, ec->gpe);  in acpi_ec_clear_gpe()
397 static void acpi_ec_submit_request(struct acpi_ec *ec)  in acpi_ec_submit_request()  argument
399 	ec->reference_count++;  in acpi_ec_submit_request()
400 	if (test_bit(EC_FLAGS_GPE_HANDLER_INSTALLED, &ec->flags) &&  in acpi_ec_submit_request()
401 	    ec->reference_count == 1)  in acpi_ec_submit_request()
402 		acpi_ec_enable_gpe(ec, true);  in acpi_ec_submit_request()
405 static void acpi_ec_complete_request(struct acpi_ec *ec)  in acpi_ec_complete_request()  argument
409 	ec->reference_count--;  in acpi_ec_complete_request()
410 	if (test_bit(EC_FLAGS_GPE_HANDLER_INSTALLED, &ec->flags) &&  in acpi_ec_complete_request()
411 	    ec->reference_count == 0)  in acpi_ec_complete_request()
412 		acpi_ec_disable_gpe(ec, true);  in acpi_ec_complete_request()
413 	flushed = acpi_ec_flushed(ec);  in acpi_ec_complete_request()
415 		wake_up(&ec->wait);  in acpi_ec_complete_request()
418 static void acpi_ec_mask_gpe(struct acpi_ec *ec)  in acpi_ec_mask_gpe()  argument
420 	if (!test_bit(EC_FLAGS_GPE_MASKED, &ec->flags)) {  in acpi_ec_mask_gpe()
421 		acpi_ec_disable_gpe(ec, false);  in acpi_ec_mask_gpe()
423 		set_bit(EC_FLAGS_GPE_MASKED, &ec->flags);  in acpi_ec_mask_gpe()
427 static void acpi_ec_unmask_gpe(struct acpi_ec *ec)  in acpi_ec_unmask_gpe()  argument
429 	if (test_bit(EC_FLAGS_GPE_MASKED, &ec->flags)) {  in acpi_ec_unmask_gpe()
430 		clear_bit(EC_FLAGS_GPE_MASKED, &ec->flags);  in acpi_ec_unmask_gpe()
431 		acpi_ec_enable_gpe(ec, false);  in acpi_ec_unmask_gpe()
447 static bool acpi_ec_submit_flushable_request(struct acpi_ec *ec)  in acpi_ec_submit_flushable_request()  argument
449 	if (!acpi_ec_started(ec))  in acpi_ec_submit_flushable_request()
451 	acpi_ec_submit_request(ec);  in acpi_ec_submit_flushable_request()
455 static void acpi_ec_submit_query(struct acpi_ec *ec)  in acpi_ec_submit_query()  argument
457 	acpi_ec_mask_gpe(ec);  in acpi_ec_submit_query()
458 	if (!acpi_ec_event_enabled(ec))  in acpi_ec_submit_query()
460 	if (!test_and_set_bit(EC_FLAGS_QUERY_PENDING, &ec->flags)) {  in acpi_ec_submit_query()
463 		ec->nr_pending_queries++;  in acpi_ec_submit_query()
464 		schedule_work(&ec->work);  in acpi_ec_submit_query()
468 static void acpi_ec_complete_query(struct acpi_ec *ec)  in acpi_ec_complete_query()  argument
470 	if (test_and_clear_bit(EC_FLAGS_QUERY_PENDING, &ec->flags))  in acpi_ec_complete_query()
473 	acpi_ec_unmask_gpe(ec);  in acpi_ec_complete_query()
476 static inline void __acpi_ec_enable_event(struct acpi_ec *ec)  in __acpi_ec_enable_event()  argument
478 	if (!test_and_set_bit(EC_FLAGS_QUERY_ENABLED, &ec->flags))  in __acpi_ec_enable_event()
484 	advance_transaction(ec);  in __acpi_ec_enable_event()
487 static inline void __acpi_ec_disable_event(struct acpi_ec *ec)  in __acpi_ec_disable_event()  argument
489 	if (test_and_clear_bit(EC_FLAGS_QUERY_ENABLED, &ec->flags))  in __acpi_ec_disable_event()
497 static void acpi_ec_clear(struct acpi_ec *ec)  in acpi_ec_clear()  argument
503 		status = acpi_ec_query(ec, &value);  in acpi_ec_clear()
513 static void acpi_ec_enable_event(struct acpi_ec *ec)  in acpi_ec_enable_event()  argument
517 	spin_lock_irqsave(&ec->lock, flags);  in acpi_ec_enable_event()
518 	if (acpi_ec_started(ec))  in acpi_ec_enable_event()
519 		__acpi_ec_enable_event(ec);  in acpi_ec_enable_event()
520 	spin_unlock_irqrestore(&ec->lock, flags);  in acpi_ec_enable_event()
524 		acpi_ec_clear(ec);  in acpi_ec_enable_event()
528 static bool acpi_ec_query_flushed(struct acpi_ec *ec)  in acpi_ec_query_flushed()  argument
533 	spin_lock_irqsave(&ec->lock, flags);  in acpi_ec_query_flushed()
534 	flushed = !ec->nr_pending_queries;  in acpi_ec_query_flushed()
535 	spin_unlock_irqrestore(&ec->lock, flags);  in acpi_ec_query_flushed()
539 static void __acpi_ec_flush_event(struct acpi_ec *ec)  in __acpi_ec_flush_event()  argument
545 	wait_event(ec->wait, acpi_ec_query_flushed(ec));  in __acpi_ec_flush_event()
550 static void acpi_ec_disable_event(struct acpi_ec *ec)  in acpi_ec_disable_event()  argument
554 	spin_lock_irqsave(&ec->lock, flags);  in acpi_ec_disable_event()
555 	__acpi_ec_disable_event(ec);  in acpi_ec_disable_event()
556 	spin_unlock_irqrestore(&ec->lock, flags);  in acpi_ec_disable_event()
557 	__acpi_ec_flush_event(ec);  in acpi_ec_disable_event()
569 static bool acpi_ec_guard_event(struct acpi_ec *ec)  in acpi_ec_guard_event()  argument
574 	spin_lock_irqsave(&ec->lock, flags);  in acpi_ec_guard_event()
591 	    !test_bit(EC_FLAGS_QUERY_PENDING, &ec->flags) ||  in acpi_ec_guard_event()
592 	    (ec->curr && ec->curr->command == ACPI_EC_COMMAND_QUERY))  in acpi_ec_guard_event()
594 	spin_unlock_irqrestore(&ec->lock, flags);  in acpi_ec_guard_event()
598 static int ec_transaction_polled(struct acpi_ec *ec)  in ec_transaction_polled()  argument
603 	spin_lock_irqsave(&ec->lock, flags);  in ec_transaction_polled()
604 	if (ec->curr && (ec->curr->flags & ACPI_EC_COMMAND_POLL))  in ec_transaction_polled()
606 	spin_unlock_irqrestore(&ec->lock, flags);  in ec_transaction_polled()
610 static int ec_transaction_completed(struct acpi_ec *ec)  in ec_transaction_completed()  argument
615 	spin_lock_irqsave(&ec->lock, flags);  in ec_transaction_completed()
616 	if (ec->curr && (ec->curr->flags & ACPI_EC_COMMAND_COMPLETE))  in ec_transaction_completed()
618 	spin_unlock_irqrestore(&ec->lock, flags);  in ec_transaction_completed()
622 static inline void ec_transaction_transition(struct acpi_ec *ec, unsigned long flag)  in ec_transaction_transition()  argument
624 	ec->curr->flags |= flag;  in ec_transaction_transition()
625 	if (ec->curr->command == ACPI_EC_COMMAND_QUERY) {  in ec_transaction_transition()
628 			acpi_ec_complete_query(ec);  in ec_transaction_transition()
631 			acpi_ec_complete_query(ec);  in ec_transaction_transition()
634 			set_bit(EC_FLAGS_QUERY_GUARDING, &ec->flags);  in ec_transaction_transition()
638 static void advance_transaction(struct acpi_ec *ec)  in advance_transaction()  argument
651 	acpi_ec_clear_gpe(ec);  in advance_transaction()
652 	status = acpi_ec_read_status(ec);  in advance_transaction()
653 	t = ec->curr;  in advance_transaction()
660 		    (!ec->nr_pending_queries ||  in advance_transaction()
661 		     test_bit(EC_FLAGS_QUERY_GUARDING, &ec->flags))) {  in advance_transaction()
662 			clear_bit(EC_FLAGS_QUERY_GUARDING, &ec->flags);  in advance_transaction()
663 			acpi_ec_complete_query(ec);  in advance_transaction()
671 				acpi_ec_write_data(ec, t->wdata[t->wi++]);  in advance_transaction()
676 				t->rdata[t->ri++] = acpi_ec_read_data(ec);  in advance_transaction()
678 					ec_transaction_transition(ec, ACPI_EC_COMMAND_COMPLETE);  in advance_transaction()
688 			ec_transaction_transition(ec, ACPI_EC_COMMAND_COMPLETE);  in advance_transaction()
696 			ec_transaction_transition(ec, ACPI_EC_COMMAND_POLL);  in advance_transaction()
698 			ec_transaction_transition(ec, ACPI_EC_COMMAND_COMPLETE);  in advance_transaction()
703 			acpi_ec_write_cmd(ec, t->command);  in advance_transaction()
704 			ec_transaction_transition(ec, ACPI_EC_COMMAND_POLL);  in advance_transaction()
720 				acpi_ec_mask_gpe(ec);  in advance_transaction()
725 		acpi_ec_submit_query(ec);  in advance_transaction()
727 		wake_up(&ec->wait);  in advance_transaction()
730 static void start_transaction(struct acpi_ec *ec)  in start_transaction()  argument
732 	ec->curr->irq_count = ec->curr->wi = ec->curr->ri = 0;  in start_transaction()
733 	ec->curr->flags = 0;  in start_transaction()
736 static int ec_guard(struct acpi_ec *ec)  in ec_guard()  argument
738 	unsigned long guard = usecs_to_jiffies(ec->polling_guard);  in ec_guard()
739 	unsigned long timeout = ec->timestamp + guard;  in ec_guard()
743 		if (ec->busy_polling) {  in ec_guard()
745 			if (ec_transaction_completed(ec))  in ec_guard()
759 			if (!ec_transaction_polled(ec) &&  in ec_guard()
760 			    !acpi_ec_guard_event(ec))  in ec_guard()
762 			if (wait_event_timeout(ec->wait,  in ec_guard()
763 					       ec_transaction_completed(ec),  in ec_guard()
771 static int ec_poll(struct acpi_ec *ec)  in ec_poll()  argument
780 			if (!ec_guard(ec))  in ec_poll()
782 			spin_lock_irqsave(&ec->lock, flags);  in ec_poll()
783 			advance_transaction(ec);  in ec_poll()
784 			spin_unlock_irqrestore(&ec->lock, flags);  in ec_poll()
787 		spin_lock_irqsave(&ec->lock, flags);  in ec_poll()
788 		start_transaction(ec);  in ec_poll()
789 		spin_unlock_irqrestore(&ec->lock, flags);  in ec_poll()
794 static int acpi_ec_transaction_unlocked(struct acpi_ec *ec,  in acpi_ec_transaction_unlocked()  argument
801 	spin_lock_irqsave(&ec->lock, tmp);  in acpi_ec_transaction_unlocked()
803 	if (!acpi_ec_submit_flushable_request(ec)) {  in acpi_ec_transaction_unlocked()
807 	ec_dbg_ref(ec, "Increase command");  in acpi_ec_transaction_unlocked()
809 	ec->curr = t;  in acpi_ec_transaction_unlocked()
811 	start_transaction(ec);  in acpi_ec_transaction_unlocked()
812 	spin_unlock_irqrestore(&ec->lock, tmp);  in acpi_ec_transaction_unlocked()
814 	ret = ec_poll(ec);  in acpi_ec_transaction_unlocked()
816 	spin_lock_irqsave(&ec->lock, tmp);  in acpi_ec_transaction_unlocked()
818 		acpi_ec_unmask_gpe(ec);  in acpi_ec_transaction_unlocked()
820 	ec->curr = NULL;  in acpi_ec_transaction_unlocked()
822 	acpi_ec_complete_request(ec);  in acpi_ec_transaction_unlocked()
823 	ec_dbg_ref(ec, "Decrease command");  in acpi_ec_transaction_unlocked()
825 	spin_unlock_irqrestore(&ec->lock, tmp);  in acpi_ec_transaction_unlocked()
829 static int acpi_ec_transaction(struct acpi_ec *ec, struct transaction *t)  in acpi_ec_transaction()  argument
834 	if (!ec || (!t) || (t->wlen && !t->wdata) || (t->rlen && !t->rdata))  in acpi_ec_transaction()
839 	mutex_lock(&ec->mutex);  in acpi_ec_transaction()
840 	if (ec->global_lock) {  in acpi_ec_transaction()
848 	status = acpi_ec_transaction_unlocked(ec, t);  in acpi_ec_transaction()
850 	if (ec->global_lock)  in acpi_ec_transaction()
853 	mutex_unlock(&ec->mutex);  in acpi_ec_transaction()
857 static int acpi_ec_burst_enable(struct acpi_ec *ec)  in acpi_ec_burst_enable()  argument
864 	return acpi_ec_transaction(ec, &t);  in acpi_ec_burst_enable()
867 static int acpi_ec_burst_disable(struct acpi_ec *ec)  in acpi_ec_burst_disable()  argument
873 	return (acpi_ec_read_status(ec) & ACPI_EC_FLAG_BURST) ?  in acpi_ec_burst_disable()
874 				acpi_ec_transaction(ec, &t) : 0;  in acpi_ec_burst_disable()
877 static int acpi_ec_read(struct acpi_ec *ec, u8 address, u8 *data)  in acpi_ec_read()  argument
885 	result = acpi_ec_transaction(ec, &t);  in acpi_ec_read()
890 static int acpi_ec_write(struct acpi_ec *ec, u8 address, u8 data)  in acpi_ec_write()  argument
897 	return acpi_ec_transaction(ec, &t);  in acpi_ec_write()
955 static void acpi_ec_start(struct acpi_ec *ec, bool resuming)  in acpi_ec_start()  argument
959 	spin_lock_irqsave(&ec->lock, flags);  in acpi_ec_start()
960 	if (!test_and_set_bit(EC_FLAGS_STARTED, &ec->flags)) {  in acpi_ec_start()
964 			acpi_ec_submit_request(ec);  in acpi_ec_start()
965 			ec_dbg_ref(ec, "Increase driver");  in acpi_ec_start()
969 	spin_unlock_irqrestore(&ec->lock, flags);  in acpi_ec_start()
972 static bool acpi_ec_stopped(struct acpi_ec *ec)  in acpi_ec_stopped()  argument
977 	spin_lock_irqsave(&ec->lock, flags);  in acpi_ec_stopped()
978 	flushed = acpi_ec_flushed(ec);  in acpi_ec_stopped()
979 	spin_unlock_irqrestore(&ec->lock, flags);  in acpi_ec_stopped()
983 static void acpi_ec_stop(struct acpi_ec *ec, bool suspending)  in acpi_ec_stop()  argument
987 	spin_lock_irqsave(&ec->lock, flags);  in acpi_ec_stop()
988 	if (acpi_ec_started(ec)) {  in acpi_ec_stop()
990 		set_bit(EC_FLAGS_STOPPED, &ec->flags);  in acpi_ec_stop()
991 		spin_unlock_irqrestore(&ec->lock, flags);  in acpi_ec_stop()
992 		wait_event(ec->wait, acpi_ec_stopped(ec));  in acpi_ec_stop()
993 		spin_lock_irqsave(&ec->lock, flags);  in acpi_ec_stop()
996 			acpi_ec_complete_request(ec);  in acpi_ec_stop()
997 			ec_dbg_ref(ec, "Decrease driver");  in acpi_ec_stop()
999 			__acpi_ec_disable_event(ec);  in acpi_ec_stop()
1000 		clear_bit(EC_FLAGS_STARTED, &ec->flags);  in acpi_ec_stop()
1001 		clear_bit(EC_FLAGS_STOPPED, &ec->flags);  in acpi_ec_stop()
1004 	spin_unlock_irqrestore(&ec->lock, flags);  in acpi_ec_stop()
1007 static void acpi_ec_enter_noirq(struct acpi_ec *ec)  in acpi_ec_enter_noirq()  argument
1011 	spin_lock_irqsave(&ec->lock, flags);  in acpi_ec_enter_noirq()
1012 	ec->busy_polling = true;  in acpi_ec_enter_noirq()
1013 	ec->polling_guard = 0;  in acpi_ec_enter_noirq()
1015 	spin_unlock_irqrestore(&ec->lock, flags);  in acpi_ec_enter_noirq()
1018 static void acpi_ec_leave_noirq(struct acpi_ec *ec)  in acpi_ec_leave_noirq()  argument
1022 	spin_lock_irqsave(&ec->lock, flags);  in acpi_ec_leave_noirq()
1023 	ec->busy_polling = ec_busy_polling;  in acpi_ec_leave_noirq()
1024 	ec->polling_guard = ec_polling_guard;  in acpi_ec_leave_noirq()
1026 	spin_unlock_irqrestore(&ec->lock, flags);  in acpi_ec_leave_noirq()
1031 	struct acpi_ec *ec = first_ec;  in acpi_ec_block_transactions()  local
1033 	if (!ec)  in acpi_ec_block_transactions()
1036 	mutex_lock(&ec->mutex);  in acpi_ec_block_transactions()
1038 	acpi_ec_stop(ec, true);  in acpi_ec_block_transactions()
1039 	mutex_unlock(&ec->mutex);  in acpi_ec_block_transactions()
1064 acpi_ec_get_query_handler_by_value(struct acpi_ec *ec, u8 value)  in acpi_ec_get_query_handler_by_value()  argument
1069 	mutex_lock(&ec->mutex);  in acpi_ec_get_query_handler_by_value()
1070 	list_for_each_entry(handler, &ec->list, node) {  in acpi_ec_get_query_handler_by_value()
1076 	mutex_unlock(&ec->mutex);  in acpi_ec_get_query_handler_by_value()
1093 int acpi_ec_add_query_handler(struct acpi_ec *ec, u8 query_bit,  in acpi_ec_add_query_handler()  argument
1107 	mutex_lock(&ec->mutex);  in acpi_ec_add_query_handler()
1109 	list_add(&handler->node, &ec->list);  in acpi_ec_add_query_handler()
1110 	mutex_unlock(&ec->mutex);  in acpi_ec_add_query_handler()
1115 static void acpi_ec_remove_query_handlers(struct acpi_ec *ec,  in acpi_ec_remove_query_handlers()  argument
1121 	mutex_lock(&ec->mutex);  in acpi_ec_remove_query_handlers()
1122 	list_for_each_entry_safe(handler, tmp, &ec->list, node) {  in acpi_ec_remove_query_handlers()
1128 	mutex_unlock(&ec->mutex);  in acpi_ec_remove_query_handlers()
1133 void acpi_ec_remove_query_handler(struct acpi_ec *ec, u8 query_bit)  in acpi_ec_remove_query_handler()  argument
1135 	acpi_ec_remove_query_handlers(ec, false, query_bit);  in acpi_ec_remove_query_handler()
1178 static int acpi_ec_query(struct acpi_ec *ec, u8 *data)  in acpi_ec_query()  argument
1193 	result = acpi_ec_transaction(ec, &q->transaction);  in acpi_ec_query()
1199 	q->handler = acpi_ec_get_query_handler_by_value(ec, value);  in acpi_ec_query()
1228 static void acpi_ec_check_event(struct acpi_ec *ec)  in acpi_ec_check_event()  argument
1233 		if (ec_guard(ec)) {  in acpi_ec_check_event()
1234 			spin_lock_irqsave(&ec->lock, flags);  in acpi_ec_check_event()
1239 			if (!ec->curr)  in acpi_ec_check_event()
1240 				advance_transaction(ec);  in acpi_ec_check_event()
1241 			spin_unlock_irqrestore(&ec->lock, flags);  in acpi_ec_check_event()
1249 	struct acpi_ec *ec = container_of(work, struct acpi_ec, work);  in acpi_ec_event_handler()  local
1253 	spin_lock_irqsave(&ec->lock, flags);  in acpi_ec_event_handler()
1254 	while (ec->nr_pending_queries) {  in acpi_ec_event_handler()
1255 		spin_unlock_irqrestore(&ec->lock, flags);  in acpi_ec_event_handler()
1256 		(void)acpi_ec_query(ec, NULL);  in acpi_ec_event_handler()
1257 		spin_lock_irqsave(&ec->lock, flags);  in acpi_ec_event_handler()
1258 		ec->nr_pending_queries--;  in acpi_ec_event_handler()
1265 		if (!ec->nr_pending_queries) {  in acpi_ec_event_handler()
1268 				acpi_ec_complete_query(ec);  in acpi_ec_event_handler()
1271 	spin_unlock_irqrestore(&ec->lock, flags);  in acpi_ec_event_handler()
1275 	acpi_ec_check_event(ec);  in acpi_ec_event_handler()
1282 	struct acpi_ec *ec = data;  in acpi_ec_gpe_handler()  local
1284 	spin_lock_irqsave(&ec->lock, flags);  in acpi_ec_gpe_handler()
1285 	advance_transaction(ec);  in acpi_ec_gpe_handler()
1286 	spin_unlock_irqrestore(&ec->lock, flags);  in acpi_ec_gpe_handler()
1299 	struct acpi_ec *ec = handler_context;  in acpi_ec_space_handler()  local
1309 	if (ec->busy_polling || bits > 8)  in acpi_ec_space_handler()
1310 		acpi_ec_burst_enable(ec);  in acpi_ec_space_handler()
1314 			acpi_ec_read(ec, address, value) :  in acpi_ec_space_handler()
1315 			acpi_ec_write(ec, address, *value);  in acpi_ec_space_handler()
1317 	if (ec->busy_polling || bits > 8)  in acpi_ec_space_handler()
1318 		acpi_ec_burst_disable(ec);  in acpi_ec_space_handler()
1339 static void acpi_ec_free(struct acpi_ec *ec)  in acpi_ec_free()  argument
1341 	if (first_ec == ec)  in acpi_ec_free()
1343 	if (boot_ec == ec)  in acpi_ec_free()
1345 	kfree(ec);  in acpi_ec_free()
1350 	struct acpi_ec *ec = kzalloc(sizeof(struct acpi_ec), GFP_KERNEL);  in acpi_ec_alloc()  local
1352 	if (!ec)  in acpi_ec_alloc()
1354 	mutex_init(&ec->mutex);  in acpi_ec_alloc()
1355 	init_waitqueue_head(&ec->wait);  in acpi_ec_alloc()
1356 	INIT_LIST_HEAD(&ec->list);  in acpi_ec_alloc()
1357 	spin_lock_init(&ec->lock);  in acpi_ec_alloc()
1358 	INIT_WORK(&ec->work, acpi_ec_event_handler);  in acpi_ec_alloc()
1359 	ec->timestamp = jiffies;  in acpi_ec_alloc()
1360 	ec->busy_polling = true;  in acpi_ec_alloc()
1361 	ec->polling_guard = 0;  in acpi_ec_alloc()
1362 	return ec;  in acpi_ec_alloc()
1371 	struct acpi_ec *ec = context;  in acpi_ec_register_query_methods()  local
1378 		acpi_ec_add_query_handler(ec, value, handle, NULL, NULL);  in acpi_ec_register_query_methods()
1387 	struct acpi_ec *ec = context;  in ec_parse_device()  local
1390 	ec->command_addr = ec->data_addr = 0;  in ec_parse_device()
1393 				     ec_parse_io_ports, ec);  in ec_parse_device()
1396 	if (ec->data_addr == 0 || ec->command_addr == 0)  in ec_parse_device()
1404 		ec->gpe = boot_ec->gpe;  in ec_parse_device()
1411 		ec->gpe = tmp;  in ec_parse_device()
1416 	ec->global_lock = tmp;  in ec_parse_device()
1417 	ec->handle = handle;  in ec_parse_device()
1426 static int ec_install_handlers(struct acpi_ec *ec, bool handle_events)  in ec_install_handlers()  argument
1430 	acpi_ec_start(ec, false);  in ec_install_handlers()
1432 	if (!test_bit(EC_FLAGS_EC_HANDLER_INSTALLED, &ec->flags)) {  in ec_install_handlers()
1433 		acpi_ec_enter_noirq(ec);  in ec_install_handlers()
1434 		status = acpi_install_address_space_handler(ec->handle,  in ec_install_handlers()
1437 							    NULL, ec);  in ec_install_handlers()
1449 				acpi_ec_stop(ec, false);  in ec_install_handlers()
1453 		set_bit(EC_FLAGS_EC_HANDLER_INSTALLED, &ec->flags);  in ec_install_handlers()
1459 	if (!test_bit(EC_FLAGS_EVT_HANDLER_INSTALLED, &ec->flags)) {  in ec_install_handlers()
1461 		acpi_walk_namespace(ACPI_TYPE_METHOD, ec->handle, 1,  in ec_install_handlers()
1463 				    NULL, ec, NULL);  in ec_install_handlers()
1464 		set_bit(EC_FLAGS_EVT_HANDLER_INSTALLED, &ec->flags);  in ec_install_handlers()
1466 	if (!test_bit(EC_FLAGS_GPE_HANDLER_INSTALLED, &ec->flags)) {  in ec_install_handlers()
1467 		status = acpi_install_gpe_raw_handler(NULL, ec->gpe,  in ec_install_handlers()
1469 					  &acpi_ec_gpe_handler, ec);  in ec_install_handlers()
1472 			set_bit(EC_FLAGS_GPE_HANDLER_INSTALLED, &ec->flags);  in ec_install_handlers()
1473 			acpi_ec_leave_noirq(ec);  in ec_install_handlers()
1474 			if (test_bit(EC_FLAGS_STARTED, &ec->flags) &&  in ec_install_handlers()
1475 			    ec->reference_count >= 1)  in ec_install_handlers()
1476 				acpi_ec_enable_gpe(ec, true);  in ec_install_handlers()
1480 	acpi_ec_enable_event(ec);  in ec_install_handlers()
1485 static void ec_remove_handlers(struct acpi_ec *ec)  in ec_remove_handlers()  argument
1487 	if (test_bit(EC_FLAGS_EC_HANDLER_INSTALLED, &ec->flags)) {  in ec_remove_handlers()
1488 		if (ACPI_FAILURE(acpi_remove_address_space_handler(ec->handle,  in ec_remove_handlers()
1491 		clear_bit(EC_FLAGS_EC_HANDLER_INSTALLED, &ec->flags);  in ec_remove_handlers()
1505 	acpi_ec_stop(ec, false);  in ec_remove_handlers()
1507 	if (test_bit(EC_FLAGS_GPE_HANDLER_INSTALLED, &ec->flags)) {  in ec_remove_handlers()
1508 		if (ACPI_FAILURE(acpi_remove_gpe_handler(NULL, ec->gpe,  in ec_remove_handlers()
1511 		clear_bit(EC_FLAGS_GPE_HANDLER_INSTALLED, &ec->flags);  in ec_remove_handlers()
1513 	if (test_bit(EC_FLAGS_EVT_HANDLER_INSTALLED, &ec->flags)) {  in ec_remove_handlers()
1514 		acpi_ec_remove_query_handlers(ec, true, 0);  in ec_remove_handlers()
1515 		clear_bit(EC_FLAGS_EVT_HANDLER_INSTALLED, &ec->flags);  in ec_remove_handlers()
1519 static int acpi_ec_setup(struct acpi_ec *ec, bool handle_events)  in acpi_ec_setup()  argument
1523 	ret = ec_install_handlers(ec, handle_events);  in acpi_ec_setup()
1529 		first_ec = ec;  in acpi_ec_setup()
1533 	acpi_handle_info(ec->handle,  in acpi_ec_setup()
1535 			 ec->gpe, ec->command_addr, ec->data_addr);  in acpi_ec_setup()
1560 	struct acpi_ec *ec = NULL;  in acpi_ec_add()  local
1570 		ec = boot_ec;  in acpi_ec_add()
1573 		ec = acpi_ec_alloc();  in acpi_ec_add()
1574 		if (!ec)  in acpi_ec_add()
1577 		status = ec_parse_device(device->handle, 0, ec, NULL);  in acpi_ec_add()
1583 		if (boot_ec && ec->command_addr == boot_ec->command_addr &&  in acpi_ec_add()
1584 		    ec->data_addr == boot_ec->data_addr) {  in acpi_ec_add()
1592 			boot_ec->handle = ec->handle;  in acpi_ec_add()
1593 			acpi_handle_debug(ec->handle, "duplicated.\n");  in acpi_ec_add()
1594 			acpi_ec_free(ec);  in acpi_ec_add()
1595 			ec = boot_ec;  in acpi_ec_add()
1599 	ret = acpi_ec_setup(ec, true);  in acpi_ec_add()
1603 	if (ec == boot_ec)  in acpi_ec_add()
1608 	device->driver_data = ec;  in acpi_ec_add()
1610 	ret = !!request_region(ec->data_addr, 1, "EC data");  in acpi_ec_add()
1611 	WARN(!ret, "Could not request EC data io port 0x%lx", ec->data_addr);  in acpi_ec_add()
1612 	ret = !!request_region(ec->command_addr, 1, "EC cmd");  in acpi_ec_add()
1613 	WARN(!ret, "Could not request EC cmd io port 0x%lx", ec->command_addr);  in acpi_ec_add()
1617 		acpi_walk_dep_device_list(ec->handle);  in acpi_ec_add()
1619 	acpi_handle_debug(ec->handle, "enumerated.\n");  in acpi_ec_add()
1623 	if (ec != boot_ec)  in acpi_ec_add()
1624 		acpi_ec_remove_query_handlers(ec, true, 0);  in acpi_ec_add()
1626 	if (ec != boot_ec)  in acpi_ec_add()
1627 		acpi_ec_free(ec);  in acpi_ec_add()
1633 	struct acpi_ec *ec;  in acpi_ec_remove()  local
1638 	ec = acpi_driver_data(device);  in acpi_ec_remove()
1639 	release_region(ec->data_addr, 1);  in acpi_ec_remove()
1640 	release_region(ec->command_addr, 1);  in acpi_ec_remove()
1642 	if (ec != boot_ec) {  in acpi_ec_remove()
1643 		ec_remove_handlers(ec);  in acpi_ec_remove()
1644 		acpi_ec_free(ec);  in acpi_ec_remove()
1652 	struct acpi_ec *ec = context;  in ec_parse_io_ports()  local
1662 	if (ec->data_addr == 0)  in ec_parse_io_ports()
1663 		ec->data_addr = resource->data.io.minimum;  in ec_parse_io_ports()
1664 	else if (ec->command_addr == 0)  in ec_parse_io_ports()
1665 		ec->command_addr = resource->data.io.minimum;  in ec_parse_io_ports()
1685 	struct acpi_ec *ec;  in acpi_ec_dsdt_probe()  local
1698 	ec = acpi_ec_alloc();  in acpi_ec_dsdt_probe()
1699 	if (!ec)  in acpi_ec_dsdt_probe()
1706 	status = acpi_get_devices(ec_device_ids[0].id, ec_parse_device, ec, NULL);  in acpi_ec_dsdt_probe()
1707 	if (ACPI_FAILURE(status) || !ec->handle) {  in acpi_ec_dsdt_probe()
1708 		acpi_ec_free(ec);  in acpi_ec_dsdt_probe()
1719 	ret = acpi_ec_setup(ec, false);  in acpi_ec_dsdt_probe()
1721 		acpi_ec_free(ec);  in acpi_ec_dsdt_probe()
1725 	boot_ec = ec;  in acpi_ec_dsdt_probe()
1727 	acpi_handle_info(ec->handle,  in acpi_ec_dsdt_probe()
1862 	struct acpi_ec *ec;  in acpi_ec_ecdt_probe()  local
1881 	ec = acpi_ec_alloc();  in acpi_ec_ecdt_probe()
1882 	if (!ec)  in acpi_ec_ecdt_probe()
1886 		ec->command_addr = ecdt_ptr->data.address;  in acpi_ec_ecdt_probe()
1887 		ec->data_addr = ecdt_ptr->control.address;  in acpi_ec_ecdt_probe()
1889 		ec->command_addr = ecdt_ptr->control.address;  in acpi_ec_ecdt_probe()
1890 		ec->data_addr = ecdt_ptr->data.address;  in acpi_ec_ecdt_probe()
1892 	ec->gpe = ecdt_ptr->gpe;  in acpi_ec_ecdt_probe()
1893 	ec->handle = ACPI_ROOT_OBJECT;  in acpi_ec_ecdt_probe()
1899 	ret = acpi_ec_setup(ec, false);  in acpi_ec_ecdt_probe()
1901 		acpi_ec_free(ec);  in acpi_ec_ecdt_probe()
1905 	boot_ec = ec;  in acpi_ec_ecdt_probe()
1914 	struct acpi_ec *ec =  in acpi_ec_suspend()  local
1918 		acpi_ec_disable_event(ec);  in acpi_ec_suspend()
1924 	struct acpi_ec *ec = acpi_driver_data(to_acpi_device(dev));  in acpi_ec_suspend_noirq()  local
1930 	if (ec_no_wakeup && test_bit(EC_FLAGS_STARTED, &ec->flags) &&  in acpi_ec_suspend_noirq()
1931 	    ec->reference_count >= 1)  in acpi_ec_suspend_noirq()
1932 		acpi_set_gpe(NULL, ec->gpe, ACPI_GPE_DISABLE);  in acpi_ec_suspend_noirq()
1934 	acpi_ec_enter_noirq(ec);  in acpi_ec_suspend_noirq()
1941 	struct acpi_ec *ec = acpi_driver_data(to_acpi_device(dev));  in acpi_ec_resume_noirq()  local
1943 	acpi_ec_leave_noirq(ec);  in acpi_ec_resume_noirq()
1945 	if (ec_no_wakeup && test_bit(EC_FLAGS_STARTED, &ec->flags) &&  in acpi_ec_resume_noirq()
1946 	    ec->reference_count >= 1)  in acpi_ec_resume_noirq()
1947 		acpi_set_gpe(NULL, ec->gpe, ACPI_GPE_ENABLE);  in acpi_ec_resume_noirq()
1954 	struct acpi_ec *ec =  in acpi_ec_resume()  local
1957 	acpi_ec_enable_event(ec);  in acpi_ec_resume()