2 // rc-ir-raw.c - handle IR pulse/space events
13 /* Used to keep track of IR raw clients, protected by ir_raw_handler_lock */
16 /* Used to handle IR raw handler extensions */
25 	struct ir_raw_event_ctrl *raw = data;  in ir_raw_event_thread()  local
26 	struct rc_dev *dev = raw->dev;  in ir_raw_event_thread()
30 		while (kfifo_out(&raw->kfifo, &ev, 1)) {  in ir_raw_event_thread()
34 				if (is_timing_event(raw->prev_ev) &&  in ir_raw_event_thread()
35 				    !is_transition(&ev, &raw->prev_ev))  in ir_raw_event_thread()
44 			raw->prev_ev = ev;  in ir_raw_event_thread()
53 		} else if (!kfifo_is_empty(&raw->kfifo))  in ir_raw_event_thread()
63  * ir_raw_event_store() - pass a pulse/space duration to the raw ir decoders
68  * pulse/space duration for the raw ir decoding state machines. Pulses are
74 	if (!dev->raw)  in ir_raw_event_store()
80 	if (!kfifo_put(&dev->raw->kfifo, *ev)) {  in ir_raw_event_store()
90  * ir_raw_event_store_edge() - notify raw ir decoders of the start of a pulse/space
96  * reception) for the raw ir decoding state machines. This is used by
105 	if (!dev->raw)  in ir_raw_event_store_edge()
109 	ev.duration = ktime_to_us(ktime_sub(now, dev->raw->last_event));  in ir_raw_event_store_edge()
117  * ir_raw_event_store_with_timeout() - pass a pulse/space duration to the raw
124  * pulse/space duration for the raw ir decoding state machines, schedules
132 	if (!dev->raw)  in ir_raw_event_store_with_timeout()
137 	spin_lock(&dev->raw->edge_spinlock);  in ir_raw_event_store_with_timeout()
140 	dev->raw->last_event = now;  in ir_raw_event_store_with_timeout()
143 	if (!timer_pending(&dev->raw->edge_handle) ||  in ir_raw_event_store_with_timeout()
144 	    time_after(dev->raw->edge_handle.expires,  in ir_raw_event_store_with_timeout()
146 		mod_timer(&dev->raw->edge_handle,  in ir_raw_event_store_with_timeout()
149 	spin_unlock(&dev->raw->edge_spinlock);  in ir_raw_event_store_with_timeout()
169 	if (!dev->raw)  in ir_raw_event_store_with_filter()
178 	if (!dev->raw->this_ev.duration)  in ir_raw_event_store_with_filter()
179 		dev->raw->this_ev = *ev;  in ir_raw_event_store_with_filter()
180 	else if (ev->pulse == dev->raw->this_ev.pulse)  in ir_raw_event_store_with_filter()
181 		dev->raw->this_ev.duration += ev->duration;  in ir_raw_event_store_with_filter()
183 		ir_raw_event_store(dev, &dev->raw->this_ev);  in ir_raw_event_store_with_filter()
184 		dev->raw->this_ev = *ev;  in ir_raw_event_store_with_filter()
189 	    dev->raw->this_ev.duration >= dev->timeout)  in ir_raw_event_store_with_filter()
203 	if (!dev->raw)  in ir_raw_event_set_idle()
209 		dev->raw->this_ev.timeout = true;  in ir_raw_event_set_idle()
210 		ir_raw_event_store(dev, &dev->raw->this_ev);  in ir_raw_event_set_idle()
211 		dev->raw->this_ev = (struct ir_raw_event) {};  in ir_raw_event_set_idle()
229 	if (!dev->raw || !dev->raw->thread)  in ir_raw_event_handle()
232 	wake_up_process(dev->raw->thread);  in ir_raw_event_handle()
301  *		each raw event filled.
302  * @max:	Maximum number of raw events to fill.
309  * to @max raw IR events using the *@ev pointer.
381  * ir_raw_gen_pd() - Encode data to raw events with pulse-distance modulation.
383  *		each raw event filled.
384  * @max:	Maximum number of raw events to fill.
391  * to @max raw IR events using the *@ev pointer.
440  * ir_raw_gen_pl() - Encode data to raw events with pulse-length modulation.
442  *		each raw event filled.
443  * @max:	Maximum number of raw events to fill.
450  * to @max raw IR events using the *@ev pointer.
504  * ir_raw_encode_scancode() - Encode a scancode as raw events
508  * @events:		array of raw events to write into
509  * @max:		max number of raw events
511  * Attempts to encode the scancode as raw events.
555 	struct ir_raw_event_ctrl *raw = from_timer(raw, t, edge_handle);  in ir_raw_edge_handle()  local
556 	struct rc_dev *dev = raw->dev;  in ir_raw_edge_handle()
560 	spin_lock_irqsave(&dev->raw->edge_spinlock, flags);  in ir_raw_edge_handle()
561 	interval = ktime_sub(ktime_get(), dev->raw->last_event);  in ir_raw_edge_handle()
570 		mod_timer(&dev->raw->edge_handle,  in ir_raw_edge_handle()
574 	spin_unlock_irqrestore(&dev->raw->edge_spinlock, flags);  in ir_raw_edge_handle()
610  * Used to (un)register raw event clients
617 	dev->raw = kzalloc(sizeof(*dev->raw), GFP_KERNEL);  in ir_raw_event_prepare()
618 	if (!dev->raw)  in ir_raw_event_prepare()
621 	dev->raw->dev = dev;  in ir_raw_event_prepare()
624 	spin_lock_init(&dev->raw->edge_spinlock);  in ir_raw_event_prepare()
625 	timer_setup(&dev->raw->edge_handle, ir_raw_edge_handle, 0);  in ir_raw_event_prepare()
626 	INIT_KFIFO(dev->raw->kfifo);  in ir_raw_event_prepare()
635 	thread = kthread_run(ir_raw_event_thread, dev->raw, "rc%u", dev->minor);  in ir_raw_event_register()
639 	dev->raw->thread = thread;  in ir_raw_event_register()
642 	list_add_tail(&dev->raw->list, &ir_raw_client_list);  in ir_raw_event_register()
653 	kfree(dev->raw);  in ir_raw_event_free()
654 	dev->raw = NULL;  in ir_raw_event_free()
661 	if (!dev || !dev->raw)  in ir_raw_event_unregister()
664 	kthread_stop(dev->raw->thread);  in ir_raw_event_unregister()
665 	del_timer_sync(&dev->raw->edge_handle);  in ir_raw_event_unregister()
668 	list_del(&dev->raw->list);  in ir_raw_event_unregister()
680 	 * ensure that the raw member is null on unlock; this is how  in ir_raw_event_unregister()
703 	struct ir_raw_event_ctrl *raw;  in ir_raw_handler_unregister()  local
708 	list_for_each_entry(raw, &ir_raw_client_list, list) {  in ir_raw_handler_unregister()
710 		    (raw->dev->enabled_protocols & protocols))  in ir_raw_handler_unregister()
711 			ir_raw_handler->raw_unregister(raw->dev);  in ir_raw_handler_unregister()
712 		ir_raw_disable_protocols(raw->dev, protocols);  in ir_raw_handler_unregister()