68 	struct ct_timer_instance *ti = (struct ct_timer_instance *)data;  in ct_systimer_callback()  local
69 	struct snd_pcm_substream *substream = ti->substream;  in ct_systimer_callback()
71 	struct ct_atc_pcm *apcm = ti->apcm;  in ct_systimer_callback()
78 	dist = (position + buffer_size - ti->position) % buffer_size;  in ct_systimer_callback()
80 	    position / period_size != ti->position / period_size) {  in ct_systimer_callback()
82 		ti->position = position;  in ct_systimer_callback()
88 	spin_lock_irqsave(&ti->lock, flags);  in ct_systimer_callback()
89 	if (ti->running)  in ct_systimer_callback()
90 		mod_timer(&ti->timer, jiffies + interval);  in ct_systimer_callback()
91 	spin_unlock_irqrestore(&ti->lock, flags);  in ct_systimer_callback()
94 static void ct_systimer_init(struct ct_timer_instance *ti)  in ct_systimer_init()  argument
96 	setup_timer(&ti->timer, ct_systimer_callback,  in ct_systimer_init()
97 		    (unsigned long)ti);  in ct_systimer_init()
100 static void ct_systimer_start(struct ct_timer_instance *ti)  in ct_systimer_start()  argument
102 	struct snd_pcm_runtime *runtime = ti->substream->runtime;  in ct_systimer_start()
105 	spin_lock_irqsave(&ti->lock, flags);  in ct_systimer_start()
106 	ti->running = 1;  in ct_systimer_start()
107 	mod_timer(&ti->timer,  in ct_systimer_start()
110 	spin_unlock_irqrestore(&ti->lock, flags);  in ct_systimer_start()
113 static void ct_systimer_stop(struct ct_timer_instance *ti)  in ct_systimer_stop()  argument
117 	spin_lock_irqsave(&ti->lock, flags);  in ct_systimer_stop()
118 	ti->running = 0;  in ct_systimer_stop()
119 	del_timer(&ti->timer);  in ct_systimer_stop()
120 	spin_unlock_irqrestore(&ti->lock, flags);  in ct_systimer_stop()
123 static void ct_systimer_prepare(struct ct_timer_instance *ti)  in ct_systimer_prepare()  argument
125 	ct_systimer_stop(ti);  in ct_systimer_prepare()
126 	try_to_del_timer_sync(&ti->timer);  in ct_systimer_prepare()
185 	struct ct_timer_instance *ti;  in ct_xfitimer_reprogram()  local
199 	list_for_each_entry(ti, &atimer->running_head, running_list) {  in ct_xfitimer_reprogram()
200 		if (ti->frag_count > diff)  in ct_xfitimer_reprogram()
201 			ti->frag_count -= diff;  in ct_xfitimer_reprogram()
206 			period_size = ti->substream->runtime->period_size;  in ct_xfitimer_reprogram()
207 			rate = ti->substream->runtime->rate;  in ct_xfitimer_reprogram()
208 			pos = ti->substream->ops->pointer(ti->substream);  in ct_xfitimer_reprogram()
209 			if (pos / period_size != ti->position / period_size) {  in ct_xfitimer_reprogram()
210 				ti->need_update = 1;  in ct_xfitimer_reprogram()
211 				ti->position = pos;  in ct_xfitimer_reprogram()
216 			ti->frag_count = div_u64((u64)pos * CT_TIMER_FREQ +  in ct_xfitimer_reprogram()
219 		if (ti->need_update && !can_update)  in ct_xfitimer_reprogram()
221 		if (ti->frag_count < min_intr)  in ct_xfitimer_reprogram()
222 			min_intr = ti->frag_count;  in ct_xfitimer_reprogram()
235 	struct ct_timer_instance *ti;  in ct_xfitimer_check_period()  local
239 	list_for_each_entry(ti, &atimer->instance_head, instance_list) {  in ct_xfitimer_check_period()
240 		if (ti->running && ti->need_update) {  in ct_xfitimer_check_period()
241 			ti->need_update = 0;  in ct_xfitimer_check_period()
242 			ti->apcm->interrupt(ti->apcm);  in ct_xfitimer_check_period()
267 static void ct_xfitimer_prepare(struct ct_timer_instance *ti)  in ct_xfitimer_prepare()  argument
269 	ti->frag_count = ti->substream->runtime->period_size;  in ct_xfitimer_prepare()
270 	ti->running = 0;  in ct_xfitimer_prepare()
271 	ti->need_update = 0;  in ct_xfitimer_prepare()
293 static void ct_xfitimer_start(struct ct_timer_instance *ti)  in ct_xfitimer_start()  argument
295 	struct ct_timer *atimer = ti->timer_base;  in ct_xfitimer_start()
299 	if (list_empty(&ti->running_list))  in ct_xfitimer_start()
301 	ti->running = 1;  in ct_xfitimer_start()
302 	ti->need_update = 0;  in ct_xfitimer_start()
303 	list_add(&ti->running_list, &atimer->running_head);  in ct_xfitimer_start()
308 static void ct_xfitimer_stop(struct ct_timer_instance *ti)  in ct_xfitimer_stop()  argument
310 	struct ct_timer *atimer = ti->timer_base;  in ct_xfitimer_stop()
314 	list_del_init(&ti->running_list);  in ct_xfitimer_stop()
315 	ti->running = 0;  in ct_xfitimer_stop()
340 	struct ct_timer_instance *ti;  in ct_timer_instance_new()  local
342 	ti = kzalloc(sizeof(*ti), GFP_KERNEL);  in ct_timer_instance_new()
343 	if (!ti)  in ct_timer_instance_new()
345 	spin_lock_init(&ti->lock);  in ct_timer_instance_new()
346 	INIT_LIST_HEAD(&ti->instance_list);  in ct_timer_instance_new()
347 	INIT_LIST_HEAD(&ti->running_list);  in ct_timer_instance_new()
348 	ti->timer_base = atimer;  in ct_timer_instance_new()
349 	ti->apcm = apcm;  in ct_timer_instance_new()
350 	ti->substream = apcm->substream;  in ct_timer_instance_new()
352 		atimer->ops->init(ti);  in ct_timer_instance_new()
355 	list_add(&ti->instance_list, &atimer->instance_head);  in ct_timer_instance_new()
358 	return ti;  in ct_timer_instance_new()
361 void ct_timer_prepare(struct ct_timer_instance *ti)  in ct_timer_prepare()  argument
363 	if (ti->timer_base->ops->prepare)  in ct_timer_prepare()
364 		ti->timer_base->ops->prepare(ti);  in ct_timer_prepare()
365 	ti->position = 0;  in ct_timer_prepare()
366 	ti->running = 0;  in ct_timer_prepare()
369 void ct_timer_start(struct ct_timer_instance *ti)  in ct_timer_start()  argument
371 	struct ct_timer *atimer = ti->timer_base;  in ct_timer_start()
372 	atimer->ops->start(ti);  in ct_timer_start()
375 void ct_timer_stop(struct ct_timer_instance *ti)  in ct_timer_stop()  argument
377 	struct ct_timer *atimer = ti->timer_base;  in ct_timer_stop()
378 	atimer->ops->stop(ti);  in ct_timer_stop()
381 void ct_timer_instance_free(struct ct_timer_instance *ti)  in ct_timer_instance_free()  argument
383 	struct ct_timer *atimer = ti->timer_base;  in ct_timer_instance_free()
385 	atimer->ops->stop(ti); /* to be sure */  in ct_timer_instance_free()
387 		atimer->ops->free_instance(ti);  in ct_timer_instance_free()
390 	list_del(&ti->instance_list);  in ct_timer_instance_free()
393 	kfree(ti);  in ct_timer_instance_free()