171 static int acpi_ec_query(struct acpi_ec *ec, u8 *data);
172 static void advance_transaction(struct acpi_ec *ec);
229 #define ec_dbg_ref(ec, fmt, ...) \  argument
230 	ec_dbg_raw("%lu: " fmt, ec->reference_count, ## __VA_ARGS__)
236 static bool acpi_ec_started(struct acpi_ec *ec)  in acpi_ec_started()  argument
238 	return test_bit(EC_FLAGS_STARTED, &ec->flags) &&  in acpi_ec_started()
239 	       !test_bit(EC_FLAGS_STOPPED, &ec->flags);  in acpi_ec_started()
242 static bool acpi_ec_event_enabled(struct acpi_ec *ec)  in acpi_ec_event_enabled()  argument
249 	if (!test_bit(EC_FLAGS_QUERY_ENABLED, &ec->flags))  in acpi_ec_event_enabled()
261 		return acpi_ec_started(ec);  in acpi_ec_event_enabled()
263 		return test_bit(EC_FLAGS_STARTED, &ec->flags);  in acpi_ec_event_enabled()
266 static bool acpi_ec_flushed(struct acpi_ec *ec)  in acpi_ec_flushed()  argument
268 	return ec->reference_count == 1;  in acpi_ec_flushed()
275 static inline u8 acpi_ec_read_status(struct acpi_ec *ec)  in acpi_ec_read_status()  argument
277 	u8 x = inb(ec->command_addr);  in acpi_ec_read_status()
290 static inline u8 acpi_ec_read_data(struct acpi_ec *ec)  in acpi_ec_read_data()  argument
292 	u8 x = inb(ec->data_addr);  in acpi_ec_read_data()
294 	ec->timestamp = jiffies;  in acpi_ec_read_data()
299 static inline void acpi_ec_write_cmd(struct acpi_ec *ec, u8 command)  in acpi_ec_write_cmd()  argument
302 	outb(command, ec->command_addr);  in acpi_ec_write_cmd()
303 	ec->timestamp = jiffies;  in acpi_ec_write_cmd()
306 static inline void acpi_ec_write_data(struct acpi_ec *ec, u8 data)  in acpi_ec_write_data()  argument
309 	outb(data, ec->data_addr);  in acpi_ec_write_data()
310 	ec->timestamp = jiffies;  in acpi_ec_write_data()
338 static inline bool acpi_ec_is_gpe_raised(struct acpi_ec *ec)  in acpi_ec_is_gpe_raised()  argument
342 	(void)acpi_get_gpe_status(NULL, ec->gpe, &gpe_status);  in acpi_ec_is_gpe_raised()
346 static inline void acpi_ec_enable_gpe(struct acpi_ec *ec, bool open)  in acpi_ec_enable_gpe()  argument
349 		acpi_enable_gpe(NULL, ec->gpe);  in acpi_ec_enable_gpe()
351 		BUG_ON(ec->reference_count < 1);  in acpi_ec_enable_gpe()
352 		acpi_set_gpe(NULL, ec->gpe, ACPI_GPE_ENABLE);  in acpi_ec_enable_gpe()
354 	if (acpi_ec_is_gpe_raised(ec)) {  in acpi_ec_enable_gpe()
361 		advance_transaction(ec);  in acpi_ec_enable_gpe()
365 static inline void acpi_ec_disable_gpe(struct acpi_ec *ec, bool close)  in acpi_ec_disable_gpe()  argument
368 		acpi_disable_gpe(NULL, ec->gpe);  in acpi_ec_disable_gpe()
370 		BUG_ON(ec->reference_count < 1);  in acpi_ec_disable_gpe()
371 		acpi_set_gpe(NULL, ec->gpe, ACPI_GPE_DISABLE);  in acpi_ec_disable_gpe()
375 static inline void acpi_ec_clear_gpe(struct acpi_ec *ec)  in acpi_ec_clear_gpe()  argument
387 	if (!acpi_ec_is_gpe_raised(ec))  in acpi_ec_clear_gpe()
389 	acpi_clear_gpe(NULL, ec->gpe);  in acpi_ec_clear_gpe()
396 static void acpi_ec_submit_request(struct acpi_ec *ec)  in acpi_ec_submit_request()  argument
398 	ec->reference_count++;  in acpi_ec_submit_request()
399 	if (test_bit(EC_FLAGS_EVENT_HANDLER_INSTALLED, &ec->flags) &&  in acpi_ec_submit_request()
400 	    ec->gpe >= 0 && ec->reference_count == 1)  in acpi_ec_submit_request()
401 		acpi_ec_enable_gpe(ec, true);  in acpi_ec_submit_request()
404 static void acpi_ec_complete_request(struct acpi_ec *ec)  in acpi_ec_complete_request()  argument
408 	ec->reference_count--;  in acpi_ec_complete_request()
409 	if (test_bit(EC_FLAGS_EVENT_HANDLER_INSTALLED, &ec->flags) &&  in acpi_ec_complete_request()
410 	    ec->gpe >= 0 && ec->reference_count == 0)  in acpi_ec_complete_request()
411 		acpi_ec_disable_gpe(ec, true);  in acpi_ec_complete_request()
412 	flushed = acpi_ec_flushed(ec);  in acpi_ec_complete_request()
414 		wake_up(&ec->wait);  in acpi_ec_complete_request()
417 static void acpi_ec_mask_events(struct acpi_ec *ec)  in acpi_ec_mask_events()  argument
419 	if (!test_bit(EC_FLAGS_EVENTS_MASKED, &ec->flags)) {  in acpi_ec_mask_events()
420 		if (ec->gpe >= 0)  in acpi_ec_mask_events()
421 			acpi_ec_disable_gpe(ec, false);  in acpi_ec_mask_events()
423 			disable_irq_nosync(ec->irq);  in acpi_ec_mask_events()
426 		set_bit(EC_FLAGS_EVENTS_MASKED, &ec->flags);  in acpi_ec_mask_events()
430 static void acpi_ec_unmask_events(struct acpi_ec *ec)  in acpi_ec_unmask_events()  argument
432 	if (test_bit(EC_FLAGS_EVENTS_MASKED, &ec->flags)) {  in acpi_ec_unmask_events()
433 		clear_bit(EC_FLAGS_EVENTS_MASKED, &ec->flags);  in acpi_ec_unmask_events()
434 		if (ec->gpe >= 0)  in acpi_ec_unmask_events()
435 			acpi_ec_enable_gpe(ec, false);  in acpi_ec_unmask_events()
437 			enable_irq(ec->irq);  in acpi_ec_unmask_events()
454 static bool acpi_ec_submit_flushable_request(struct acpi_ec *ec)  in acpi_ec_submit_flushable_request()  argument
456 	if (!acpi_ec_started(ec))  in acpi_ec_submit_flushable_request()
458 	acpi_ec_submit_request(ec);  in acpi_ec_submit_flushable_request()
462 static void acpi_ec_submit_query(struct acpi_ec *ec)  in acpi_ec_submit_query()  argument
464 	acpi_ec_mask_events(ec);  in acpi_ec_submit_query()
465 	if (!acpi_ec_event_enabled(ec))  in acpi_ec_submit_query()
467 	if (!test_and_set_bit(EC_FLAGS_QUERY_PENDING, &ec->flags)) {  in acpi_ec_submit_query()
470 		ec->nr_pending_queries++;  in acpi_ec_submit_query()
471 		queue_work(ec_wq, &ec->work);  in acpi_ec_submit_query()
475 static void acpi_ec_complete_query(struct acpi_ec *ec)  in acpi_ec_complete_query()  argument
477 	if (test_and_clear_bit(EC_FLAGS_QUERY_PENDING, &ec->flags))  in acpi_ec_complete_query()
480 	acpi_ec_unmask_events(ec);  in acpi_ec_complete_query()
483 static inline void __acpi_ec_enable_event(struct acpi_ec *ec)  in __acpi_ec_enable_event()  argument
485 	if (!test_and_set_bit(EC_FLAGS_QUERY_ENABLED, &ec->flags))  in __acpi_ec_enable_event()
491 	advance_transaction(ec);  in __acpi_ec_enable_event()
494 static inline void __acpi_ec_disable_event(struct acpi_ec *ec)  in __acpi_ec_disable_event()  argument
496 	if (test_and_clear_bit(EC_FLAGS_QUERY_ENABLED, &ec->flags))  in __acpi_ec_disable_event()
504 static void acpi_ec_clear(struct acpi_ec *ec)  in acpi_ec_clear()  argument
510 		status = acpi_ec_query(ec, &value);  in acpi_ec_clear()
520 static void acpi_ec_enable_event(struct acpi_ec *ec)  in acpi_ec_enable_event()  argument
524 	spin_lock_irqsave(&ec->lock, flags);  in acpi_ec_enable_event()
525 	if (acpi_ec_started(ec))  in acpi_ec_enable_event()
526 		__acpi_ec_enable_event(ec);  in acpi_ec_enable_event()
527 	spin_unlock_irqrestore(&ec->lock, flags);  in acpi_ec_enable_event()
531 		acpi_ec_clear(ec);  in acpi_ec_enable_event()
541 static void acpi_ec_disable_event(struct acpi_ec *ec)  in acpi_ec_disable_event()  argument
545 	spin_lock_irqsave(&ec->lock, flags);  in acpi_ec_disable_event()
546 	__acpi_ec_disable_event(ec);  in acpi_ec_disable_event()
547 	spin_unlock_irqrestore(&ec->lock, flags);  in acpi_ec_disable_event()
566 static bool acpi_ec_guard_event(struct acpi_ec *ec)  in acpi_ec_guard_event()  argument
571 	spin_lock_irqsave(&ec->lock, flags);  in acpi_ec_guard_event()
588 	    !test_bit(EC_FLAGS_QUERY_PENDING, &ec->flags) ||  in acpi_ec_guard_event()
589 	    (ec->curr && ec->curr->command == ACPI_EC_COMMAND_QUERY))  in acpi_ec_guard_event()
591 	spin_unlock_irqrestore(&ec->lock, flags);  in acpi_ec_guard_event()
595 static int ec_transaction_polled(struct acpi_ec *ec)  in ec_transaction_polled()  argument
600 	spin_lock_irqsave(&ec->lock, flags);  in ec_transaction_polled()
601 	if (ec->curr && (ec->curr->flags & ACPI_EC_COMMAND_POLL))  in ec_transaction_polled()
603 	spin_unlock_irqrestore(&ec->lock, flags);  in ec_transaction_polled()
607 static int ec_transaction_completed(struct acpi_ec *ec)  in ec_transaction_completed()  argument
612 	spin_lock_irqsave(&ec->lock, flags);  in ec_transaction_completed()
613 	if (ec->curr && (ec->curr->flags & ACPI_EC_COMMAND_COMPLETE))  in ec_transaction_completed()
615 	spin_unlock_irqrestore(&ec->lock, flags);  in ec_transaction_completed()
619 static inline void ec_transaction_transition(struct acpi_ec *ec, unsigned long flag)  in ec_transaction_transition()  argument
621 	ec->curr->flags |= flag;  in ec_transaction_transition()
622 	if (ec->curr->command == ACPI_EC_COMMAND_QUERY) {  in ec_transaction_transition()
625 			acpi_ec_complete_query(ec);  in ec_transaction_transition()
628 			acpi_ec_complete_query(ec);  in ec_transaction_transition()
631 			set_bit(EC_FLAGS_QUERY_GUARDING, &ec->flags);  in ec_transaction_transition()
635 static void advance_transaction(struct acpi_ec *ec)  in advance_transaction()  argument
648 	if (ec->gpe >= 0)  in advance_transaction()
649 		acpi_ec_clear_gpe(ec);  in advance_transaction()
651 	status = acpi_ec_read_status(ec);  in advance_transaction()
652 	t = ec->curr;  in advance_transaction()
659 		    (!ec->nr_pending_queries ||  in advance_transaction()
660 		     test_bit(EC_FLAGS_QUERY_GUARDING, &ec->flags))) {  in advance_transaction()
661 			clear_bit(EC_FLAGS_QUERY_GUARDING, &ec->flags);  in advance_transaction()
662 			acpi_ec_complete_query(ec);  in advance_transaction()
670 				acpi_ec_write_data(ec, t->wdata[t->wi++]);  in advance_transaction()
675 				t->rdata[t->ri++] = acpi_ec_read_data(ec);  in advance_transaction()
677 					ec_transaction_transition(ec, ACPI_EC_COMMAND_COMPLETE);  in advance_transaction()
687 			ec_transaction_transition(ec, ACPI_EC_COMMAND_COMPLETE);  in advance_transaction()
692 		acpi_ec_write_cmd(ec, t->command);  in advance_transaction()
693 		ec_transaction_transition(ec, ACPI_EC_COMMAND_POLL);  in advance_transaction()
707 				acpi_ec_mask_events(ec);  in advance_transaction()
712 		acpi_ec_submit_query(ec);  in advance_transaction()
714 		wake_up(&ec->wait);  in advance_transaction()
717 static void start_transaction(struct acpi_ec *ec)  in start_transaction()  argument
719 	ec->curr->irq_count = ec->curr->wi = ec->curr->ri = 0;  in start_transaction()
720 	ec->curr->flags = 0;  in start_transaction()
723 static int ec_guard(struct acpi_ec *ec)  in ec_guard()  argument
725 	unsigned long guard = usecs_to_jiffies(ec->polling_guard);  in ec_guard()
726 	unsigned long timeout = ec->timestamp + guard;  in ec_guard()
730 		if (ec->busy_polling) {  in ec_guard()
732 			if (ec_transaction_completed(ec))  in ec_guard()
746 			if (!ec_transaction_polled(ec) &&  in ec_guard()
747 			    !acpi_ec_guard_event(ec))  in ec_guard()
749 			if (wait_event_timeout(ec->wait,  in ec_guard()
750 					       ec_transaction_completed(ec),  in ec_guard()
758 static int ec_poll(struct acpi_ec *ec)  in ec_poll()  argument
767 			if (!ec_guard(ec))  in ec_poll()
769 			spin_lock_irqsave(&ec->lock, flags);  in ec_poll()
770 			advance_transaction(ec);  in ec_poll()
771 			spin_unlock_irqrestore(&ec->lock, flags);  in ec_poll()
774 		spin_lock_irqsave(&ec->lock, flags);  in ec_poll()
775 		start_transaction(ec);  in ec_poll()
776 		spin_unlock_irqrestore(&ec->lock, flags);  in ec_poll()
781 static int acpi_ec_transaction_unlocked(struct acpi_ec *ec,  in acpi_ec_transaction_unlocked()  argument
788 	spin_lock_irqsave(&ec->lock, tmp);  in acpi_ec_transaction_unlocked()
790 	if (!acpi_ec_submit_flushable_request(ec)) {  in acpi_ec_transaction_unlocked()
794 	ec_dbg_ref(ec, "Increase command");  in acpi_ec_transaction_unlocked()
796 	ec->curr = t;  in acpi_ec_transaction_unlocked()
798 	start_transaction(ec);  in acpi_ec_transaction_unlocked()
799 	spin_unlock_irqrestore(&ec->lock, tmp);  in acpi_ec_transaction_unlocked()
801 	ret = ec_poll(ec);  in acpi_ec_transaction_unlocked()
803 	spin_lock_irqsave(&ec->lock, tmp);  in acpi_ec_transaction_unlocked()
805 		acpi_ec_unmask_events(ec);  in acpi_ec_transaction_unlocked()
807 	ec->curr = NULL;  in acpi_ec_transaction_unlocked()
809 	acpi_ec_complete_request(ec);  in acpi_ec_transaction_unlocked()
810 	ec_dbg_ref(ec, "Decrease command");  in acpi_ec_transaction_unlocked()
812 	spin_unlock_irqrestore(&ec->lock, tmp);  in acpi_ec_transaction_unlocked()
816 static int acpi_ec_transaction(struct acpi_ec *ec, struct transaction *t)  in acpi_ec_transaction()  argument
821 	if (!ec || (!t) || (t->wlen && !t->wdata) || (t->rlen && !t->rdata))  in acpi_ec_transaction()
826 	mutex_lock(&ec->mutex);  in acpi_ec_transaction()
827 	if (ec->global_lock) {  in acpi_ec_transaction()
835 	status = acpi_ec_transaction_unlocked(ec, t);  in acpi_ec_transaction()
837 	if (ec->global_lock)  in acpi_ec_transaction()
840 	mutex_unlock(&ec->mutex);  in acpi_ec_transaction()
844 static int acpi_ec_burst_enable(struct acpi_ec *ec)  in acpi_ec_burst_enable()  argument
851 	return acpi_ec_transaction(ec, &t);  in acpi_ec_burst_enable()
854 static int acpi_ec_burst_disable(struct acpi_ec *ec)  in acpi_ec_burst_disable()  argument
860 	return (acpi_ec_read_status(ec) & ACPI_EC_FLAG_BURST) ?  in acpi_ec_burst_disable()
861 				acpi_ec_transaction(ec, &t) : 0;  in acpi_ec_burst_disable()
864 static int acpi_ec_read(struct acpi_ec *ec, u8 address, u8 *data)  in acpi_ec_read()  argument
872 	result = acpi_ec_transaction(ec, &t);  in acpi_ec_read()
877 static int acpi_ec_write(struct acpi_ec *ec, u8 address, u8 data)  in acpi_ec_write()  argument
884 	return acpi_ec_transaction(ec, &t);  in acpi_ec_write()
942 static void acpi_ec_start(struct acpi_ec *ec, bool resuming)  in acpi_ec_start()  argument
946 	spin_lock_irqsave(&ec->lock, flags);  in acpi_ec_start()
947 	if (!test_and_set_bit(EC_FLAGS_STARTED, &ec->flags)) {  in acpi_ec_start()
951 			acpi_ec_submit_request(ec);  in acpi_ec_start()
952 			ec_dbg_ref(ec, "Increase driver");  in acpi_ec_start()
956 	spin_unlock_irqrestore(&ec->lock, flags);  in acpi_ec_start()
959 static bool acpi_ec_stopped(struct acpi_ec *ec)  in acpi_ec_stopped()  argument
964 	spin_lock_irqsave(&ec->lock, flags);  in acpi_ec_stopped()
965 	flushed = acpi_ec_flushed(ec);  in acpi_ec_stopped()
966 	spin_unlock_irqrestore(&ec->lock, flags);  in acpi_ec_stopped()
970 static void acpi_ec_stop(struct acpi_ec *ec, bool suspending)  in acpi_ec_stop()  argument
974 	spin_lock_irqsave(&ec->lock, flags);  in acpi_ec_stop()
975 	if (acpi_ec_started(ec)) {  in acpi_ec_stop()
977 		set_bit(EC_FLAGS_STOPPED, &ec->flags);  in acpi_ec_stop()
978 		spin_unlock_irqrestore(&ec->lock, flags);  in acpi_ec_stop()
979 		wait_event(ec->wait, acpi_ec_stopped(ec));  in acpi_ec_stop()
980 		spin_lock_irqsave(&ec->lock, flags);  in acpi_ec_stop()
983 			acpi_ec_complete_request(ec);  in acpi_ec_stop()
984 			ec_dbg_ref(ec, "Decrease driver");  in acpi_ec_stop()
986 			__acpi_ec_disable_event(ec);  in acpi_ec_stop()
987 		clear_bit(EC_FLAGS_STARTED, &ec->flags);  in acpi_ec_stop()
988 		clear_bit(EC_FLAGS_STOPPED, &ec->flags);  in acpi_ec_stop()
991 	spin_unlock_irqrestore(&ec->lock, flags);  in acpi_ec_stop()
994 static void acpi_ec_enter_noirq(struct acpi_ec *ec)  in acpi_ec_enter_noirq()  argument
998 	spin_lock_irqsave(&ec->lock, flags);  in acpi_ec_enter_noirq()
999 	ec->busy_polling = true;  in acpi_ec_enter_noirq()
1000 	ec->polling_guard = 0;  in acpi_ec_enter_noirq()
1002 	spin_unlock_irqrestore(&ec->lock, flags);  in acpi_ec_enter_noirq()
1005 static void acpi_ec_leave_noirq(struct acpi_ec *ec)  in acpi_ec_leave_noirq()  argument
1009 	spin_lock_irqsave(&ec->lock, flags);  in acpi_ec_leave_noirq()
1010 	ec->busy_polling = ec_busy_polling;  in acpi_ec_leave_noirq()
1011 	ec->polling_guard = ec_polling_guard;  in acpi_ec_leave_noirq()
1013 	spin_unlock_irqrestore(&ec->lock, flags);  in acpi_ec_leave_noirq()
1018 	struct acpi_ec *ec = first_ec;  in acpi_ec_block_transactions()  local
1020 	if (!ec)  in acpi_ec_block_transactions()
1023 	mutex_lock(&ec->mutex);  in acpi_ec_block_transactions()
1025 	acpi_ec_stop(ec, true);  in acpi_ec_block_transactions()
1026 	mutex_unlock(&ec->mutex);  in acpi_ec_block_transactions()
1043 acpi_ec_get_query_handler_by_value(struct acpi_ec *ec, u8 value)  in acpi_ec_get_query_handler_by_value()  argument
1047 	mutex_lock(&ec->mutex);  in acpi_ec_get_query_handler_by_value()
1048 	list_for_each_entry(handler, &ec->list, node) {  in acpi_ec_get_query_handler_by_value()
1051 			mutex_unlock(&ec->mutex);  in acpi_ec_get_query_handler_by_value()
1055 	mutex_unlock(&ec->mutex);  in acpi_ec_get_query_handler_by_value()
1072 int acpi_ec_add_query_handler(struct acpi_ec *ec, u8 query_bit,  in acpi_ec_add_query_handler()  argument
1086 	mutex_lock(&ec->mutex);  in acpi_ec_add_query_handler()
1088 	list_add(&handler->node, &ec->list);  in acpi_ec_add_query_handler()
1089 	mutex_unlock(&ec->mutex);  in acpi_ec_add_query_handler()
1094 static void acpi_ec_remove_query_handlers(struct acpi_ec *ec,  in acpi_ec_remove_query_handlers()  argument
1100 	mutex_lock(&ec->mutex);  in acpi_ec_remove_query_handlers()
1101 	list_for_each_entry_safe(handler, tmp, &ec->list, node) {  in acpi_ec_remove_query_handlers()
1107 	mutex_unlock(&ec->mutex);  in acpi_ec_remove_query_handlers()
1112 void acpi_ec_remove_query_handler(struct acpi_ec *ec, u8 query_bit)  in acpi_ec_remove_query_handler()  argument
1114 	acpi_ec_remove_query_handlers(ec, false, query_bit);  in acpi_ec_remove_query_handler()
1157 static int acpi_ec_query(struct acpi_ec *ec, u8 *data)  in acpi_ec_query()  argument
1172 	result = acpi_ec_transaction(ec, &q->transaction);  in acpi_ec_query()
1178 	q->handler = acpi_ec_get_query_handler_by_value(ec, value);  in acpi_ec_query()
1207 static void acpi_ec_check_event(struct acpi_ec *ec)  in acpi_ec_check_event()  argument
1212 		if (ec_guard(ec)) {  in acpi_ec_check_event()
1213 			spin_lock_irqsave(&ec->lock, flags);  in acpi_ec_check_event()
1218 			if (!ec->curr)  in acpi_ec_check_event()
1219 				advance_transaction(ec);  in acpi_ec_check_event()
1220 			spin_unlock_irqrestore(&ec->lock, flags);  in acpi_ec_check_event()
1228 	struct acpi_ec *ec = container_of(work, struct acpi_ec, work);  in acpi_ec_event_handler()  local
1232 	spin_lock_irqsave(&ec->lock, flags);  in acpi_ec_event_handler()
1233 	while (ec->nr_pending_queries) {  in acpi_ec_event_handler()
1234 		spin_unlock_irqrestore(&ec->lock, flags);  in acpi_ec_event_handler()
1235 		(void)acpi_ec_query(ec, NULL);  in acpi_ec_event_handler()
1236 		spin_lock_irqsave(&ec->lock, flags);  in acpi_ec_event_handler()
1237 		ec->nr_pending_queries--;  in acpi_ec_event_handler()
1244 		if (!ec->nr_pending_queries) {  in acpi_ec_event_handler()
1247 				acpi_ec_complete_query(ec);  in acpi_ec_event_handler()
1250 	spin_unlock_irqrestore(&ec->lock, flags);  in acpi_ec_event_handler()
1254 	acpi_ec_check_event(ec);  in acpi_ec_event_handler()
1257 static void acpi_ec_handle_interrupt(struct acpi_ec *ec)  in acpi_ec_handle_interrupt()  argument
1261 	spin_lock_irqsave(&ec->lock, flags);  in acpi_ec_handle_interrupt()
1262 	advance_transaction(ec);  in acpi_ec_handle_interrupt()
1263 	spin_unlock_irqrestore(&ec->lock, flags);  in acpi_ec_handle_interrupt()
1288 	struct acpi_ec *ec = handler_context;  in acpi_ec_space_handler()  local
1298 	if (ec->busy_polling || bits > 8)  in acpi_ec_space_handler()
1299 		acpi_ec_burst_enable(ec);  in acpi_ec_space_handler()
1303 			acpi_ec_read(ec, address, value) :  in acpi_ec_space_handler()
1304 			acpi_ec_write(ec, address, *value);  in acpi_ec_space_handler()
1306 	if (ec->busy_polling || bits > 8)  in acpi_ec_space_handler()
1307 		acpi_ec_burst_disable(ec);  in acpi_ec_space_handler()
1328 static void acpi_ec_free(struct acpi_ec *ec)  in acpi_ec_free()  argument
1330 	if (first_ec == ec)  in acpi_ec_free()
1332 	if (boot_ec == ec)  in acpi_ec_free()
1334 	kfree(ec);  in acpi_ec_free()
1339 	struct acpi_ec *ec = kzalloc(sizeof(struct acpi_ec), GFP_KERNEL);  in acpi_ec_alloc()  local
1341 	if (!ec)  in acpi_ec_alloc()
1343 	mutex_init(&ec->mutex);  in acpi_ec_alloc()
1344 	init_waitqueue_head(&ec->wait);  in acpi_ec_alloc()
1345 	INIT_LIST_HEAD(&ec->list);  in acpi_ec_alloc()
1346 	spin_lock_init(&ec->lock);  in acpi_ec_alloc()
1347 	INIT_WORK(&ec->work, acpi_ec_event_handler);  in acpi_ec_alloc()
1348 	ec->timestamp = jiffies;  in acpi_ec_alloc()
1349 	ec->busy_polling = true;  in acpi_ec_alloc()
1350 	ec->polling_guard = 0;  in acpi_ec_alloc()
1351 	ec->gpe = -1;  in acpi_ec_alloc()
1352 	ec->irq = -1;  in acpi_ec_alloc()
1353 	return ec;  in acpi_ec_alloc()
1362 	struct acpi_ec *ec = context;  in acpi_ec_register_query_methods()  local
1369 		acpi_ec_add_query_handler(ec, value, handle, NULL, NULL);  in acpi_ec_register_query_methods()
1378 	struct acpi_ec *ec = context;  in ec_parse_device()  local
1381 	ec->command_addr = ec->data_addr = 0;  in ec_parse_device()
1384 				     ec_parse_io_ports, ec);  in ec_parse_device()
1387 	if (ec->data_addr == 0 || ec->command_addr == 0)  in ec_parse_device()
1395 		ec->gpe = boot_ec->gpe;  in ec_parse_device()
1401 			ec->gpe = tmp;  in ec_parse_device()
1411 	ec->global_lock = tmp;  in ec_parse_device()
1412 	ec->handle = handle;  in ec_parse_device()
1416 static bool install_gpe_event_handler(struct acpi_ec *ec)  in install_gpe_event_handler()  argument
1420 	status = acpi_install_gpe_raw_handler(NULL, ec->gpe,  in install_gpe_event_handler()
1422 					      &acpi_ec_gpe_handler, ec);  in install_gpe_event_handler()
1426 	if (test_bit(EC_FLAGS_STARTED, &ec->flags) && ec->reference_count >= 1)  in install_gpe_event_handler()
1427 		acpi_ec_enable_gpe(ec, true);  in install_gpe_event_handler()
1432 static bool install_gpio_irq_event_handler(struct acpi_ec *ec)  in install_gpio_irq_event_handler()  argument
1434 	return request_irq(ec->irq, acpi_ec_irq_handler, IRQF_SHARED,  in install_gpio_irq_event_handler()
1435 			   "ACPI EC", ec) >= 0;  in install_gpio_irq_event_handler()
1454 static int ec_install_handlers(struct acpi_ec *ec, struct acpi_device *device)  in ec_install_handlers()  argument
1458 	acpi_ec_start(ec, false);  in ec_install_handlers()
1460 	if (!test_bit(EC_FLAGS_EC_HANDLER_INSTALLED, &ec->flags)) {  in ec_install_handlers()
1461 		acpi_ec_enter_noirq(ec);  in ec_install_handlers()
1462 		status = acpi_install_address_space_handler(ec->handle,  in ec_install_handlers()
1465 							    NULL, ec);  in ec_install_handlers()
1467 			acpi_ec_stop(ec, false);  in ec_install_handlers()
1470 		set_bit(EC_FLAGS_EC_HANDLER_INSTALLED, &ec->flags);  in ec_install_handlers()
1476 	if (ec->gpe < 0) {  in ec_install_handlers()
1486 			ec->irq = irq;  in ec_install_handlers()
1489 	if (!test_bit(EC_FLAGS_QUERY_METHODS_INSTALLED, &ec->flags)) {  in ec_install_handlers()
1491 		acpi_walk_namespace(ACPI_TYPE_METHOD, ec->handle, 1,  in ec_install_handlers()
1493 				    NULL, ec, NULL);  in ec_install_handlers()
1494 		set_bit(EC_FLAGS_QUERY_METHODS_INSTALLED, &ec->flags);  in ec_install_handlers()
1496 	if (!test_bit(EC_FLAGS_EVENT_HANDLER_INSTALLED, &ec->flags)) {  in ec_install_handlers()
1499 		if (ec->gpe >= 0)  in ec_install_handlers()
1500 			ready = install_gpe_event_handler(ec);  in ec_install_handlers()
1501 		else if (ec->irq >= 0)  in ec_install_handlers()
1502 			ready = install_gpio_irq_event_handler(ec);  in ec_install_handlers()
1505 			set_bit(EC_FLAGS_EVENT_HANDLER_INSTALLED, &ec->flags);  in ec_install_handlers()
1506 			acpi_ec_leave_noirq(ec);  in ec_install_handlers()
1514 	acpi_ec_enable_event(ec);  in ec_install_handlers()
1519 static void ec_remove_handlers(struct acpi_ec *ec)  in ec_remove_handlers()  argument
1521 	if (test_bit(EC_FLAGS_EC_HANDLER_INSTALLED, &ec->flags)) {  in ec_remove_handlers()
1522 		if (ACPI_FAILURE(acpi_remove_address_space_handler(ec->handle,  in ec_remove_handlers()
1525 		clear_bit(EC_FLAGS_EC_HANDLER_INSTALLED, &ec->flags);  in ec_remove_handlers()
1539 	acpi_ec_stop(ec, false);  in ec_remove_handlers()
1541 	if (test_bit(EC_FLAGS_EVENT_HANDLER_INSTALLED, &ec->flags)) {  in ec_remove_handlers()
1542 		if (ec->gpe >= 0 &&  in ec_remove_handlers()
1543 		    ACPI_FAILURE(acpi_remove_gpe_handler(NULL, ec->gpe,  in ec_remove_handlers()
1547 		if (ec->irq >= 0)  in ec_remove_handlers()
1548 			free_irq(ec->irq, ec);  in ec_remove_handlers()
1550 		clear_bit(EC_FLAGS_EVENT_HANDLER_INSTALLED, &ec->flags);  in ec_remove_handlers()
1552 	if (test_bit(EC_FLAGS_QUERY_METHODS_INSTALLED, &ec->flags)) {  in ec_remove_handlers()
1553 		acpi_ec_remove_query_handlers(ec, true, 0);  in ec_remove_handlers()
1554 		clear_bit(EC_FLAGS_QUERY_METHODS_INSTALLED, &ec->flags);  in ec_remove_handlers()
1558 static int acpi_ec_setup(struct acpi_ec *ec, struct acpi_device *device)  in acpi_ec_setup()  argument
1562 	ret = ec_install_handlers(ec, device);  in acpi_ec_setup()
1568 		first_ec = ec;  in acpi_ec_setup()
1570 	pr_info("EC_CMD/EC_SC=0x%lx, EC_DATA=0x%lx\n", ec->command_addr,  in acpi_ec_setup()
1571 		ec->data_addr);  in acpi_ec_setup()
1573 	if (test_bit(EC_FLAGS_EVENT_HANDLER_INSTALLED, &ec->flags)) {  in acpi_ec_setup()
1574 		if (ec->gpe >= 0)  in acpi_ec_setup()
1575 			pr_info("GPE=0x%x\n", ec->gpe);  in acpi_ec_setup()
1577 			pr_info("IRQ=%d\n", ec->irq);  in acpi_ec_setup()
1585 	struct acpi_ec *ec;  in acpi_ec_add()  local
1594 		ec = boot_ec;  in acpi_ec_add()
1598 		ec = acpi_ec_alloc();  in acpi_ec_add()
1599 		if (!ec)  in acpi_ec_add()
1602 		status = ec_parse_device(device->handle, 0, ec, NULL);  in acpi_ec_add()
1608 		if (boot_ec && ec->command_addr == boot_ec->command_addr &&  in acpi_ec_add()
1609 		    ec->data_addr == boot_ec->data_addr) {  in acpi_ec_add()
1616 			boot_ec->handle = ec->handle;  in acpi_ec_add()
1617 			acpi_handle_debug(ec->handle, "duplicated.\n");  in acpi_ec_add()
1618 			acpi_ec_free(ec);  in acpi_ec_add()
1619 			ec = boot_ec;  in acpi_ec_add()
1623 	ret = acpi_ec_setup(ec, device);  in acpi_ec_add()
1627 	if (ec == boot_ec)  in acpi_ec_add()
1632 	acpi_handle_info(ec->handle,  in acpi_ec_add()
1635 	device->driver_data = ec;  in acpi_ec_add()
1637 	ret = !!request_region(ec->data_addr, 1, "EC data");  in acpi_ec_add()
1638 	WARN(!ret, "Could not request EC data io port 0x%lx", ec->data_addr);  in acpi_ec_add()
1639 	ret = !!request_region(ec->command_addr, 1, "EC cmd");  in acpi_ec_add()
1640 	WARN(!ret, "Could not request EC cmd io port 0x%lx", ec->command_addr);  in acpi_ec_add()
1643 	acpi_walk_dep_device_list(ec->handle);  in acpi_ec_add()
1645 	acpi_handle_debug(ec->handle, "enumerated.\n");  in acpi_ec_add()
1649 	if (ec != boot_ec)  in acpi_ec_add()
1650 		acpi_ec_free(ec);  in acpi_ec_add()
1657 	struct acpi_ec *ec;  in acpi_ec_remove()  local
1662 	ec = acpi_driver_data(device);  in acpi_ec_remove()
1663 	release_region(ec->data_addr, 1);  in acpi_ec_remove()
1664 	release_region(ec->command_addr, 1);  in acpi_ec_remove()
1666 	if (ec != boot_ec) {  in acpi_ec_remove()
1667 		ec_remove_handlers(ec);  in acpi_ec_remove()
1668 		acpi_ec_free(ec);  in acpi_ec_remove()
1676 	struct acpi_ec *ec = context;  in ec_parse_io_ports()  local
1686 	if (ec->data_addr == 0)  in ec_parse_io_ports()
1687 		ec->data_addr = resource->data.io.minimum;  in ec_parse_io_ports()
1688 	else if (ec->command_addr == 0)  in ec_parse_io_ports()
1689 		ec->command_addr = resource->data.io.minimum;  in ec_parse_io_ports()
1709 	struct acpi_ec *ec;  in acpi_ec_dsdt_probe()  local
1722 	ec = acpi_ec_alloc();  in acpi_ec_dsdt_probe()
1723 	if (!ec)  in acpi_ec_dsdt_probe()
1730 	status = acpi_get_devices(ec_device_ids[0].id, ec_parse_device, ec, NULL);  in acpi_ec_dsdt_probe()
1731 	if (ACPI_FAILURE(status) || !ec->handle) {  in acpi_ec_dsdt_probe()
1732 		acpi_ec_free(ec);  in acpi_ec_dsdt_probe()
1743 	ret = acpi_ec_setup(ec, NULL);  in acpi_ec_dsdt_probe()
1745 		acpi_ec_free(ec);  in acpi_ec_dsdt_probe()
1749 	boot_ec = ec;  in acpi_ec_dsdt_probe()
1751 	acpi_handle_info(ec->handle,  in acpi_ec_dsdt_probe()
1878 	struct acpi_ec *ec;  in acpi_ec_ecdt_probe()  local
1897 	ec = acpi_ec_alloc();  in acpi_ec_ecdt_probe()
1898 	if (!ec)  in acpi_ec_ecdt_probe()
1902 		ec->command_addr = ecdt_ptr->data.address;  in acpi_ec_ecdt_probe()
1903 		ec->data_addr = ecdt_ptr->control.address;  in acpi_ec_ecdt_probe()
1905 		ec->command_addr = ecdt_ptr->control.address;  in acpi_ec_ecdt_probe()
1906 		ec->data_addr = ecdt_ptr->data.address;  in acpi_ec_ecdt_probe()
1914 		ec->gpe = ecdt_ptr->gpe;  in acpi_ec_ecdt_probe()
1916 	ec->handle = ACPI_ROOT_OBJECT;  in acpi_ec_ecdt_probe()
1922 	ret = acpi_ec_setup(ec, NULL);  in acpi_ec_ecdt_probe()
1924 		acpi_ec_free(ec);  in acpi_ec_ecdt_probe()
1928 	boot_ec = ec;  in acpi_ec_ecdt_probe()
1940 	struct acpi_ec *ec =  in acpi_ec_suspend()  local
1944 		acpi_ec_disable_event(ec);  in acpi_ec_suspend()
1950 	struct acpi_ec *ec = acpi_driver_data(to_acpi_device(dev));  in acpi_ec_suspend_noirq()  local
1956 	if (ec_no_wakeup && test_bit(EC_FLAGS_STARTED, &ec->flags) &&  in acpi_ec_suspend_noirq()
1957 	    ec->gpe >= 0 && ec->reference_count >= 1)  in acpi_ec_suspend_noirq()
1958 		acpi_set_gpe(NULL, ec->gpe, ACPI_GPE_DISABLE);  in acpi_ec_suspend_noirq()
1960 	acpi_ec_enter_noirq(ec);  in acpi_ec_suspend_noirq()
1967 	struct acpi_ec *ec = acpi_driver_data(to_acpi_device(dev));  in acpi_ec_resume_noirq()  local
1969 	acpi_ec_leave_noirq(ec);  in acpi_ec_resume_noirq()
1971 	if (ec_no_wakeup && test_bit(EC_FLAGS_STARTED, &ec->flags) &&  in acpi_ec_resume_noirq()
1972 	    ec->gpe >= 0 && ec->reference_count >= 1)  in acpi_ec_resume_noirq()
1973 		acpi_set_gpe(NULL, ec->gpe, ACPI_GPE_ENABLE);  in acpi_ec_resume_noirq()
1980 	struct acpi_ec *ec =  in acpi_ec_resume()  local
1983 	acpi_ec_enable_event(ec);  in acpi_ec_resume()