65 	struct ct_timer_instance *ti = from_timer(ti, t, timer);  in ct_systimer_callback()  local
66 	struct snd_pcm_substream *substream = ti->substream;  in ct_systimer_callback()
68 	struct ct_atc_pcm *apcm = ti->apcm;  in ct_systimer_callback()
75 	dist = (position + buffer_size - ti->position) % buffer_size;  in ct_systimer_callback()
77 	    position / period_size != ti->position / period_size) {  in ct_systimer_callback()
79 		ti->position = position;  in ct_systimer_callback()
85 	spin_lock_irqsave(&ti->lock, flags);  in ct_systimer_callback()
86 	if (ti->running)  in ct_systimer_callback()
87 		mod_timer(&ti->timer, jiffies + interval);  in ct_systimer_callback()
88 	spin_unlock_irqrestore(&ti->lock, flags);  in ct_systimer_callback()
91 static void ct_systimer_init(struct ct_timer_instance *ti)  in ct_systimer_init()  argument
93 	timer_setup(&ti->timer, ct_systimer_callback, 0);  in ct_systimer_init()
96 static void ct_systimer_start(struct ct_timer_instance *ti)  in ct_systimer_start()  argument
98 	struct snd_pcm_runtime *runtime = ti->substream->runtime;  in ct_systimer_start()
101 	spin_lock_irqsave(&ti->lock, flags);  in ct_systimer_start()
102 	ti->running = 1;  in ct_systimer_start()
103 	mod_timer(&ti->timer,  in ct_systimer_start()
106 	spin_unlock_irqrestore(&ti->lock, flags);  in ct_systimer_start()
109 static void ct_systimer_stop(struct ct_timer_instance *ti)  in ct_systimer_stop()  argument
113 	spin_lock_irqsave(&ti->lock, flags);  in ct_systimer_stop()
114 	ti->running = 0;  in ct_systimer_stop()
115 	del_timer(&ti->timer);  in ct_systimer_stop()
116 	spin_unlock_irqrestore(&ti->lock, flags);  in ct_systimer_stop()
119 static void ct_systimer_prepare(struct ct_timer_instance *ti)  in ct_systimer_prepare()  argument
121 	ct_systimer_stop(ti);  in ct_systimer_prepare()
122 	try_to_del_timer_sync(&ti->timer);  in ct_systimer_prepare()
181 	struct ct_timer_instance *ti;  in ct_xfitimer_reprogram()  local
195 	list_for_each_entry(ti, &atimer->running_head, running_list) {  in ct_xfitimer_reprogram()
196 		if (ti->frag_count > diff)  in ct_xfitimer_reprogram()
197 			ti->frag_count -= diff;  in ct_xfitimer_reprogram()
202 			period_size = ti->substream->runtime->period_size;  in ct_xfitimer_reprogram()
203 			rate = ti->substream->runtime->rate;  in ct_xfitimer_reprogram()
204 			pos = ti->substream->ops->pointer(ti->substream);  in ct_xfitimer_reprogram()
205 			if (pos / period_size != ti->position / period_size) {  in ct_xfitimer_reprogram()
206 				ti->need_update = 1;  in ct_xfitimer_reprogram()
207 				ti->position = pos;  in ct_xfitimer_reprogram()
212 			ti->frag_count = div_u64((u64)pos * CT_TIMER_FREQ +  in ct_xfitimer_reprogram()
215 		if (ti->need_update && !can_update)  in ct_xfitimer_reprogram()
217 		if (ti->frag_count < min_intr)  in ct_xfitimer_reprogram()
218 			min_intr = ti->frag_count;  in ct_xfitimer_reprogram()
231 	struct ct_timer_instance *ti;  in ct_xfitimer_check_period()  local
235 	list_for_each_entry(ti, &atimer->instance_head, instance_list) {  in ct_xfitimer_check_period()
236 		if (ti->running && ti->need_update) {  in ct_xfitimer_check_period()
237 			ti->need_update = 0;  in ct_xfitimer_check_period()
238 			ti->apcm->interrupt(ti->apcm);  in ct_xfitimer_check_period()
263 static void ct_xfitimer_prepare(struct ct_timer_instance *ti)  in ct_xfitimer_prepare()  argument
265 	ti->frag_count = ti->substream->runtime->period_size;  in ct_xfitimer_prepare()
266 	ti->running = 0;  in ct_xfitimer_prepare()
267 	ti->need_update = 0;  in ct_xfitimer_prepare()
289 static void ct_xfitimer_start(struct ct_timer_instance *ti)  in ct_xfitimer_start()  argument
291 	struct ct_timer *atimer = ti->timer_base;  in ct_xfitimer_start()
295 	if (list_empty(&ti->running_list))  in ct_xfitimer_start()
297 	ti->running = 1;  in ct_xfitimer_start()
298 	ti->need_update = 0;  in ct_xfitimer_start()
299 	list_add(&ti->running_list, &atimer->running_head);  in ct_xfitimer_start()
304 static void ct_xfitimer_stop(struct ct_timer_instance *ti)  in ct_xfitimer_stop()  argument
306 	struct ct_timer *atimer = ti->timer_base;  in ct_xfitimer_stop()
310 	list_del_init(&ti->running_list);  in ct_xfitimer_stop()
311 	ti->running = 0;  in ct_xfitimer_stop()
336 	struct ct_timer_instance *ti;  in ct_timer_instance_new()  local
338 	ti = kzalloc(sizeof(*ti), GFP_KERNEL);  in ct_timer_instance_new()
339 	if (!ti)  in ct_timer_instance_new()
341 	spin_lock_init(&ti->lock);  in ct_timer_instance_new()
342 	INIT_LIST_HEAD(&ti->instance_list);  in ct_timer_instance_new()
343 	INIT_LIST_HEAD(&ti->running_list);  in ct_timer_instance_new()
344 	ti->timer_base = atimer;  in ct_timer_instance_new()
345 	ti->apcm = apcm;  in ct_timer_instance_new()
346 	ti->substream = apcm->substream;  in ct_timer_instance_new()
348 		atimer->ops->init(ti);  in ct_timer_instance_new()
351 	list_add(&ti->instance_list, &atimer->instance_head);  in ct_timer_instance_new()
354 	return ti;  in ct_timer_instance_new()
357 void ct_timer_prepare(struct ct_timer_instance *ti)  in ct_timer_prepare()  argument
359 	if (ti->timer_base->ops->prepare)  in ct_timer_prepare()
360 		ti->timer_base->ops->prepare(ti);  in ct_timer_prepare()
361 	ti->position = 0;  in ct_timer_prepare()
362 	ti->running = 0;  in ct_timer_prepare()
365 void ct_timer_start(struct ct_timer_instance *ti)  in ct_timer_start()  argument
367 	struct ct_timer *atimer = ti->timer_base;  in ct_timer_start()
368 	atimer->ops->start(ti);  in ct_timer_start()
371 void ct_timer_stop(struct ct_timer_instance *ti)  in ct_timer_stop()  argument
373 	struct ct_timer *atimer = ti->timer_base;  in ct_timer_stop()
374 	atimer->ops->stop(ti);  in ct_timer_stop()
377 void ct_timer_instance_free(struct ct_timer_instance *ti)  in ct_timer_instance_free()  argument
379 	struct ct_timer *atimer = ti->timer_base;  in ct_timer_instance_free()
381 	atimer->ops->stop(ti); /* to be sure */  in ct_timer_instance_free()
383 		atimer->ops->free_instance(ti);  in ct_timer_instance_free()
386 	list_del(&ti->instance_list);  in ct_timer_instance_free()
389 	kfree(ti);  in ct_timer_instance_free()