21 static void snd_seq_timer_set_tick_resolution(struct snd_seq_timer *tmr)  in snd_seq_timer_set_tick_resolution()  argument
23 	if (tmr->tempo < 1000000)  in snd_seq_timer_set_tick_resolution()
24 		tmr->tick.resolution = (tmr->tempo * 1000) / tmr->ppq;  in snd_seq_timer_set_tick_resolution()
28 		s = tmr->tempo % tmr->ppq;  in snd_seq_timer_set_tick_resolution()
29 		s = (s * 1000) / tmr->ppq;  in snd_seq_timer_set_tick_resolution()
30 		tmr->tick.resolution = (tmr->tempo / tmr->ppq) * 1000;  in snd_seq_timer_set_tick_resolution()
31 		tmr->tick.resolution += s;  in snd_seq_timer_set_tick_resolution()
33 	if (tmr->tick.resolution <= 0)  in snd_seq_timer_set_tick_resolution()
34 		tmr->tick.resolution = 1;  in snd_seq_timer_set_tick_resolution()
35 	snd_seq_timer_update_tick(&tmr->tick, 0);  in snd_seq_timer_set_tick_resolution()
41 	struct snd_seq_timer *tmr;  in snd_seq_timer_new()  local
43 	tmr = kzalloc(sizeof(*tmr), GFP_KERNEL);  in snd_seq_timer_new()
44 	if (!tmr)  in snd_seq_timer_new()
46 	spin_lock_init(&tmr->lock);  in snd_seq_timer_new()
49 	snd_seq_timer_defaults(tmr);  in snd_seq_timer_new()
52 	snd_seq_timer_reset(tmr);  in snd_seq_timer_new()
54 	return tmr;  in snd_seq_timer_new()
58 void snd_seq_timer_delete(struct snd_seq_timer **tmr)  in snd_seq_timer_delete()  argument
60 	struct snd_seq_timer *t = *tmr;  in snd_seq_timer_delete()
61 	*tmr = NULL;  in snd_seq_timer_delete()
76 void snd_seq_timer_defaults(struct snd_seq_timer * tmr)  in snd_seq_timer_defaults()  argument
80 	spin_lock_irqsave(&tmr->lock, flags);  in snd_seq_timer_defaults()
82 	tmr->ppq = 96;		/* 96 PPQ */  in snd_seq_timer_defaults()
83 	tmr->tempo = 500000;	/* 120 BPM */  in snd_seq_timer_defaults()
84 	snd_seq_timer_set_tick_resolution(tmr);  in snd_seq_timer_defaults()
85 	tmr->running = 0;  in snd_seq_timer_defaults()
87 	tmr->type = SNDRV_SEQ_TIMER_ALSA;  in snd_seq_timer_defaults()
88 	tmr->alsa_id.dev_class = seq_default_timer_class;  in snd_seq_timer_defaults()
89 	tmr->alsa_id.dev_sclass = seq_default_timer_sclass;  in snd_seq_timer_defaults()
90 	tmr->alsa_id.card = seq_default_timer_card;  in snd_seq_timer_defaults()
91 	tmr->alsa_id.device = seq_default_timer_device;  in snd_seq_timer_defaults()
92 	tmr->alsa_id.subdevice = seq_default_timer_subdevice;  in snd_seq_timer_defaults()
93 	tmr->preferred_resolution = seq_default_timer_resolution;  in snd_seq_timer_defaults()
95 	tmr->skew = tmr->skew_base = SKEW_BASE;  in snd_seq_timer_defaults()
96 	spin_unlock_irqrestore(&tmr->lock, flags);  in snd_seq_timer_defaults()
99 static void seq_timer_reset(struct snd_seq_timer *tmr)  in seq_timer_reset()  argument
102 	tmr->cur_time.tv_sec = 0;  in seq_timer_reset()
103 	tmr->cur_time.tv_nsec = 0;  in seq_timer_reset()
105 	tmr->tick.cur_tick = 0;  in seq_timer_reset()
106 	tmr->tick.fraction = 0;  in seq_timer_reset()
109 void snd_seq_timer_reset(struct snd_seq_timer *tmr)  in snd_seq_timer_reset()  argument
113 	spin_lock_irqsave(&tmr->lock, flags);  in snd_seq_timer_reset()
114 	seq_timer_reset(tmr);  in snd_seq_timer_reset()
115 	spin_unlock_irqrestore(&tmr->lock, flags);  in snd_seq_timer_reset()
126 	struct snd_seq_timer *tmr;  in snd_seq_timer_interrupt()  local
130 	tmr = q->timer;  in snd_seq_timer_interrupt()
131 	if (tmr == NULL)  in snd_seq_timer_interrupt()
133 	spin_lock_irqsave(&tmr->lock, flags);  in snd_seq_timer_interrupt()
134 	if (!tmr->running) {  in snd_seq_timer_interrupt()
135 		spin_unlock_irqrestore(&tmr->lock, flags);  in snd_seq_timer_interrupt()
140 	if (tmr->skew != tmr->skew_base) {  in snd_seq_timer_interrupt()
142 		resolution = (resolution >> 16) * tmr->skew +  in snd_seq_timer_interrupt()
143 			(((resolution & 0xffff) * tmr->skew) >> 16);  in snd_seq_timer_interrupt()
147 	snd_seq_inc_time_nsec(&tmr->cur_time, resolution);  in snd_seq_timer_interrupt()
150 	snd_seq_timer_update_tick(&tmr->tick, resolution);  in snd_seq_timer_interrupt()
153 	ktime_get_ts64(&tmr->last_update);  in snd_seq_timer_interrupt()
155 	spin_unlock_irqrestore(&tmr->lock, flags);  in snd_seq_timer_interrupt()
162 int snd_seq_timer_set_tempo(struct snd_seq_timer * tmr, int tempo)  in snd_seq_timer_set_tempo()  argument
166 	if (snd_BUG_ON(!tmr))  in snd_seq_timer_set_tempo()
170 	spin_lock_irqsave(&tmr->lock, flags);  in snd_seq_timer_set_tempo()
171 	if ((unsigned int)tempo != tmr->tempo) {  in snd_seq_timer_set_tempo()
172 		tmr->tempo = tempo;  in snd_seq_timer_set_tempo()
173 		snd_seq_timer_set_tick_resolution(tmr);  in snd_seq_timer_set_tempo()
175 	spin_unlock_irqrestore(&tmr->lock, flags);  in snd_seq_timer_set_tempo()
180 int snd_seq_timer_set_tempo_ppq(struct snd_seq_timer *tmr, int tempo, int ppq)  in snd_seq_timer_set_tempo_ppq()  argument
185 	if (snd_BUG_ON(!tmr))  in snd_seq_timer_set_tempo_ppq()
189 	spin_lock_irqsave(&tmr->lock, flags);  in snd_seq_timer_set_tempo_ppq()
190 	if (tmr->running && (ppq != tmr->ppq)) {  in snd_seq_timer_set_tempo_ppq()
193 		spin_unlock_irqrestore(&tmr->lock, flags);  in snd_seq_timer_set_tempo_ppq()
197 	changed = (tempo != tmr->tempo) || (ppq != tmr->ppq);  in snd_seq_timer_set_tempo_ppq()
198 	tmr->tempo = tempo;  in snd_seq_timer_set_tempo_ppq()
199 	tmr->ppq = ppq;  in snd_seq_timer_set_tempo_ppq()
201 		snd_seq_timer_set_tick_resolution(tmr);  in snd_seq_timer_set_tempo_ppq()
202 	spin_unlock_irqrestore(&tmr->lock, flags);  in snd_seq_timer_set_tempo_ppq()
207 int snd_seq_timer_set_position_tick(struct snd_seq_timer *tmr,  in snd_seq_timer_set_position_tick()  argument
212 	if (snd_BUG_ON(!tmr))  in snd_seq_timer_set_position_tick()
215 	spin_lock_irqsave(&tmr->lock, flags);  in snd_seq_timer_set_position_tick()
216 	tmr->tick.cur_tick = position;  in snd_seq_timer_set_position_tick()
217 	tmr->tick.fraction = 0;  in snd_seq_timer_set_position_tick()
218 	spin_unlock_irqrestore(&tmr->lock, flags);  in snd_seq_timer_set_position_tick()
223 int snd_seq_timer_set_position_time(struct snd_seq_timer *tmr,  in snd_seq_timer_set_position_time()  argument
228 	if (snd_BUG_ON(!tmr))  in snd_seq_timer_set_position_time()
232 	spin_lock_irqsave(&tmr->lock, flags);  in snd_seq_timer_set_position_time()
233 	tmr->cur_time = position;  in snd_seq_timer_set_position_time()
234 	spin_unlock_irqrestore(&tmr->lock, flags);  in snd_seq_timer_set_position_time()
239 int snd_seq_timer_set_skew(struct snd_seq_timer *tmr, unsigned int skew,  in snd_seq_timer_set_skew()  argument
244 	if (snd_BUG_ON(!tmr))  in snd_seq_timer_set_skew()
252 	spin_lock_irqsave(&tmr->lock, flags);  in snd_seq_timer_set_skew()
253 	tmr->skew = skew;  in snd_seq_timer_set_skew()
254 	spin_unlock_irqrestore(&tmr->lock, flags);  in snd_seq_timer_set_skew()
261 	struct snd_seq_timer *tmr;  in snd_seq_timer_open()  local
265 	tmr = q->timer;  in snd_seq_timer_open()
266 	if (snd_BUG_ON(!tmr))  in snd_seq_timer_open()
268 	if (tmr->timeri)  in snd_seq_timer_open()
271 	if (tmr->type != SNDRV_SEQ_TIMER_ALSA)	/* standard ALSA timer */  in snd_seq_timer_open()
273 	if (tmr->alsa_id.dev_class != SNDRV_TIMER_CLASS_SLAVE)  in snd_seq_timer_open()
274 		tmr->alsa_id.dev_sclass = SNDRV_TIMER_SCLASS_SEQUENCER;  in snd_seq_timer_open()
281 	err = snd_timer_open(t, &tmr->alsa_id, q->queue);  in snd_seq_timer_open()
282 	if (err < 0 && tmr->alsa_id.dev_class != SNDRV_TIMER_CLASS_SLAVE) {  in snd_seq_timer_open()
283 		if (tmr->alsa_id.dev_class != SNDRV_TIMER_CLASS_GLOBAL ||  in snd_seq_timer_open()
284 		    tmr->alsa_id.device != SNDRV_TIMER_GLOBAL_SYSTEM) {  in snd_seq_timer_open()
299 	spin_lock_irq(&tmr->lock);  in snd_seq_timer_open()
300 	if (tmr->timeri)  in snd_seq_timer_open()
303 		tmr->timeri = t;  in snd_seq_timer_open()
304 	spin_unlock_irq(&tmr->lock);  in snd_seq_timer_open()
315 	struct snd_seq_timer *tmr;  in snd_seq_timer_close()  local
318 	tmr = q->timer;  in snd_seq_timer_close()
319 	if (snd_BUG_ON(!tmr))  in snd_seq_timer_close()
321 	spin_lock_irq(&tmr->lock);  in snd_seq_timer_close()
322 	t = tmr->timeri;  in snd_seq_timer_close()
323 	tmr->timeri = NULL;  in snd_seq_timer_close()
324 	spin_unlock_irq(&tmr->lock);  in snd_seq_timer_close()
332 static int seq_timer_stop(struct snd_seq_timer *tmr)  in seq_timer_stop()  argument
334 	if (! tmr->timeri)  in seq_timer_stop()
336 	if (!tmr->running)  in seq_timer_stop()
338 	tmr->running = 0;  in seq_timer_stop()
339 	snd_timer_pause(tmr->timeri);  in seq_timer_stop()
343 int snd_seq_timer_stop(struct snd_seq_timer *tmr)  in snd_seq_timer_stop()  argument
348 	spin_lock_irqsave(&tmr->lock, flags);  in snd_seq_timer_stop()
349 	err = seq_timer_stop(tmr);  in snd_seq_timer_stop()
350 	spin_unlock_irqrestore(&tmr->lock, flags);  in snd_seq_timer_stop()
354 static int initialize_timer(struct snd_seq_timer *tmr)  in initialize_timer()  argument
359 	t = tmr->timeri->timer;  in initialize_timer()
363 	freq = tmr->preferred_resolution;  in initialize_timer()
371 	tmr->ticks = 1;  in initialize_timer()
373 		unsigned long r = snd_timer_resolution(tmr->timeri);  in initialize_timer()
375 			tmr->ticks = (unsigned int)(1000000000uL / (r * freq));  in initialize_timer()
376 			if (! tmr->ticks)  in initialize_timer()
377 				tmr->ticks = 1;  in initialize_timer()
380 	tmr->initialized = 1;  in initialize_timer()
384 static int seq_timer_start(struct snd_seq_timer *tmr)  in seq_timer_start()  argument
386 	if (! tmr->timeri)  in seq_timer_start()
388 	if (tmr->running)  in seq_timer_start()
389 		seq_timer_stop(tmr);  in seq_timer_start()
390 	seq_timer_reset(tmr);  in seq_timer_start()
391 	if (initialize_timer(tmr) < 0)  in seq_timer_start()
393 	snd_timer_start(tmr->timeri, tmr->ticks);  in seq_timer_start()
394 	tmr->running = 1;  in seq_timer_start()
395 	ktime_get_ts64(&tmr->last_update);  in seq_timer_start()
399 int snd_seq_timer_start(struct snd_seq_timer *tmr)  in snd_seq_timer_start()  argument
404 	spin_lock_irqsave(&tmr->lock, flags);  in snd_seq_timer_start()
405 	err = seq_timer_start(tmr);  in snd_seq_timer_start()
406 	spin_unlock_irqrestore(&tmr->lock, flags);  in snd_seq_timer_start()
410 static int seq_timer_continue(struct snd_seq_timer *tmr)  in seq_timer_continue()  argument
412 	if (! tmr->timeri)  in seq_timer_continue()
414 	if (tmr->running)  in seq_timer_continue()
416 	if (! tmr->initialized) {  in seq_timer_continue()
417 		seq_timer_reset(tmr);  in seq_timer_continue()
418 		if (initialize_timer(tmr) < 0)  in seq_timer_continue()
421 	snd_timer_start(tmr->timeri, tmr->ticks);  in seq_timer_continue()
422 	tmr->running = 1;  in seq_timer_continue()
423 	ktime_get_ts64(&tmr->last_update);  in seq_timer_continue()
427 int snd_seq_timer_continue(struct snd_seq_timer *tmr)  in snd_seq_timer_continue()  argument
432 	spin_lock_irqsave(&tmr->lock, flags);  in snd_seq_timer_continue()
433 	err = seq_timer_continue(tmr);  in snd_seq_timer_continue()
434 	spin_unlock_irqrestore(&tmr->lock, flags);  in snd_seq_timer_continue()
439 snd_seq_real_time_t snd_seq_timer_get_cur_time(struct snd_seq_timer *tmr,  in snd_seq_timer_get_cur_time()  argument
445 	spin_lock_irqsave(&tmr->lock, flags);  in snd_seq_timer_get_cur_time()
446 	cur_time = tmr->cur_time;  in snd_seq_timer_get_cur_time()
447 	if (adjust_ktime && tmr->running) {  in snd_seq_timer_get_cur_time()
451 		tm = timespec64_sub(tm, tmr->last_update);  in snd_seq_timer_get_cur_time()
456 	spin_unlock_irqrestore(&tmr->lock, flags);  in snd_seq_timer_get_cur_time()
462 snd_seq_tick_time_t snd_seq_timer_get_cur_tick(struct snd_seq_timer *tmr)  in snd_seq_timer_get_cur_tick()  argument
467 	spin_lock_irqsave(&tmr->lock, flags);  in snd_seq_timer_get_cur_tick()
468 	cur_tick = tmr->tick.cur_tick;  in snd_seq_timer_get_cur_tick()
469 	spin_unlock_irqrestore(&tmr->lock, flags);  in snd_seq_timer_get_cur_tick()
481 	struct snd_seq_timer *tmr;  in snd_seq_info_timer_read()  local
490 		tmr = q->timer;  in snd_seq_info_timer_read()
491 		if (!tmr)  in snd_seq_info_timer_read()
493 		ti = tmr->timeri;  in snd_seq_info_timer_read()
497 		resolution = snd_timer_resolution(ti) * tmr->ticks;  in snd_seq_info_timer_read()
499 		snd_iprintf(buffer, "  Skew : %u / %u\n", tmr->skew, tmr->skew_base);  in snd_seq_info_timer_read()