36 static void snd_seq_timer_set_tick_resolution(struct snd_seq_timer *tmr)  in snd_seq_timer_set_tick_resolution()  argument
38 	if (tmr->tempo < 1000000)  in snd_seq_timer_set_tick_resolution()
39 		tmr->tick.resolution = (tmr->tempo * 1000) / tmr->ppq;  in snd_seq_timer_set_tick_resolution()
43 		s = tmr->tempo % tmr->ppq;  in snd_seq_timer_set_tick_resolution()
44 		s = (s * 1000) / tmr->ppq;  in snd_seq_timer_set_tick_resolution()
45 		tmr->tick.resolution = (tmr->tempo / tmr->ppq) * 1000;  in snd_seq_timer_set_tick_resolution()
46 		tmr->tick.resolution += s;  in snd_seq_timer_set_tick_resolution()
48 	if (tmr->tick.resolution <= 0)  in snd_seq_timer_set_tick_resolution()
49 		tmr->tick.resolution = 1;  in snd_seq_timer_set_tick_resolution()
50 	snd_seq_timer_update_tick(&tmr->tick, 0);  in snd_seq_timer_set_tick_resolution()
56 	struct snd_seq_timer *tmr;  in snd_seq_timer_new()  local
58 	tmr = kzalloc(sizeof(*tmr), GFP_KERNEL);  in snd_seq_timer_new()
59 	if (!tmr)  in snd_seq_timer_new()
61 	spin_lock_init(&tmr->lock);  in snd_seq_timer_new()
64 	snd_seq_timer_defaults(tmr);  in snd_seq_timer_new()
67 	snd_seq_timer_reset(tmr);  in snd_seq_timer_new()
69 	return tmr;  in snd_seq_timer_new()
73 void snd_seq_timer_delete(struct snd_seq_timer **tmr)  in snd_seq_timer_delete()  argument
75 	struct snd_seq_timer *t = *tmr;  in snd_seq_timer_delete()
76 	*tmr = NULL;  in snd_seq_timer_delete()
91 void snd_seq_timer_defaults(struct snd_seq_timer * tmr)  in snd_seq_timer_defaults()  argument
95 	spin_lock_irqsave(&tmr->lock, flags);  in snd_seq_timer_defaults()
97 	tmr->ppq = 96;		/* 96 PPQ */  in snd_seq_timer_defaults()
98 	tmr->tempo = 500000;	/* 120 BPM */  in snd_seq_timer_defaults()
99 	snd_seq_timer_set_tick_resolution(tmr);  in snd_seq_timer_defaults()
100 	tmr->running = 0;  in snd_seq_timer_defaults()
102 	tmr->type = SNDRV_SEQ_TIMER_ALSA;  in snd_seq_timer_defaults()
103 	tmr->alsa_id.dev_class = seq_default_timer_class;  in snd_seq_timer_defaults()
104 	tmr->alsa_id.dev_sclass = seq_default_timer_sclass;  in snd_seq_timer_defaults()
105 	tmr->alsa_id.card = seq_default_timer_card;  in snd_seq_timer_defaults()
106 	tmr->alsa_id.device = seq_default_timer_device;  in snd_seq_timer_defaults()
107 	tmr->alsa_id.subdevice = seq_default_timer_subdevice;  in snd_seq_timer_defaults()
108 	tmr->preferred_resolution = seq_default_timer_resolution;  in snd_seq_timer_defaults()
110 	tmr->skew = tmr->skew_base = SKEW_BASE;  in snd_seq_timer_defaults()
111 	spin_unlock_irqrestore(&tmr->lock, flags);  in snd_seq_timer_defaults()
114 static void seq_timer_reset(struct snd_seq_timer *tmr)  in seq_timer_reset()  argument
117 	tmr->cur_time.tv_sec = 0;  in seq_timer_reset()
118 	tmr->cur_time.tv_nsec = 0;  in seq_timer_reset()
120 	tmr->tick.cur_tick = 0;  in seq_timer_reset()
121 	tmr->tick.fraction = 0;  in seq_timer_reset()
124 void snd_seq_timer_reset(struct snd_seq_timer *tmr)  in snd_seq_timer_reset()  argument
128 	spin_lock_irqsave(&tmr->lock, flags);  in snd_seq_timer_reset()
129 	seq_timer_reset(tmr);  in snd_seq_timer_reset()
130 	spin_unlock_irqrestore(&tmr->lock, flags);  in snd_seq_timer_reset()
141 	struct snd_seq_timer *tmr;  in snd_seq_timer_interrupt()  local
145 	tmr = q->timer;  in snd_seq_timer_interrupt()
146 	if (tmr == NULL)  in snd_seq_timer_interrupt()
148 	spin_lock_irqsave(&tmr->lock, flags);  in snd_seq_timer_interrupt()
149 	if (!tmr->running) {  in snd_seq_timer_interrupt()
150 		spin_unlock_irqrestore(&tmr->lock, flags);  in snd_seq_timer_interrupt()
155 	if (tmr->skew != tmr->skew_base) {  in snd_seq_timer_interrupt()
157 		resolution = (resolution >> 16) * tmr->skew +  in snd_seq_timer_interrupt()
158 			(((resolution & 0xffff) * tmr->skew) >> 16);  in snd_seq_timer_interrupt()
162 	snd_seq_inc_time_nsec(&tmr->cur_time, resolution);  in snd_seq_timer_interrupt()
165 	snd_seq_timer_update_tick(&tmr->tick, resolution);  in snd_seq_timer_interrupt()
168 	ktime_get_ts64(&tmr->last_update);  in snd_seq_timer_interrupt()
170 	spin_unlock_irqrestore(&tmr->lock, flags);  in snd_seq_timer_interrupt()
177 int snd_seq_timer_set_tempo(struct snd_seq_timer * tmr, int tempo)  in snd_seq_timer_set_tempo()  argument
181 	if (snd_BUG_ON(!tmr))  in snd_seq_timer_set_tempo()
185 	spin_lock_irqsave(&tmr->lock, flags);  in snd_seq_timer_set_tempo()
186 	if ((unsigned int)tempo != tmr->tempo) {  in snd_seq_timer_set_tempo()
187 		tmr->tempo = tempo;  in snd_seq_timer_set_tempo()
188 		snd_seq_timer_set_tick_resolution(tmr);  in snd_seq_timer_set_tempo()
190 	spin_unlock_irqrestore(&tmr->lock, flags);  in snd_seq_timer_set_tempo()
195 int snd_seq_timer_set_tempo_ppq(struct snd_seq_timer *tmr, int tempo, int ppq)  in snd_seq_timer_set_tempo_ppq()  argument
200 	if (snd_BUG_ON(!tmr))  in snd_seq_timer_set_tempo_ppq()
204 	spin_lock_irqsave(&tmr->lock, flags);  in snd_seq_timer_set_tempo_ppq()
205 	if (tmr->running && (ppq != tmr->ppq)) {  in snd_seq_timer_set_tempo_ppq()
208 		spin_unlock_irqrestore(&tmr->lock, flags);  in snd_seq_timer_set_tempo_ppq()
212 	changed = (tempo != tmr->tempo) || (ppq != tmr->ppq);  in snd_seq_timer_set_tempo_ppq()
213 	tmr->tempo = tempo;  in snd_seq_timer_set_tempo_ppq()
214 	tmr->ppq = ppq;  in snd_seq_timer_set_tempo_ppq()
216 		snd_seq_timer_set_tick_resolution(tmr);  in snd_seq_timer_set_tempo_ppq()
217 	spin_unlock_irqrestore(&tmr->lock, flags);  in snd_seq_timer_set_tempo_ppq()
222 int snd_seq_timer_set_position_tick(struct snd_seq_timer *tmr,  in snd_seq_timer_set_position_tick()  argument
227 	if (snd_BUG_ON(!tmr))  in snd_seq_timer_set_position_tick()
230 	spin_lock_irqsave(&tmr->lock, flags);  in snd_seq_timer_set_position_tick()
231 	tmr->tick.cur_tick = position;  in snd_seq_timer_set_position_tick()
232 	tmr->tick.fraction = 0;  in snd_seq_timer_set_position_tick()
233 	spin_unlock_irqrestore(&tmr->lock, flags);  in snd_seq_timer_set_position_tick()
238 int snd_seq_timer_set_position_time(struct snd_seq_timer *tmr,  in snd_seq_timer_set_position_time()  argument
243 	if (snd_BUG_ON(!tmr))  in snd_seq_timer_set_position_time()
247 	spin_lock_irqsave(&tmr->lock, flags);  in snd_seq_timer_set_position_time()
248 	tmr->cur_time = position;  in snd_seq_timer_set_position_time()
249 	spin_unlock_irqrestore(&tmr->lock, flags);  in snd_seq_timer_set_position_time()
254 int snd_seq_timer_set_skew(struct snd_seq_timer *tmr, unsigned int skew,  in snd_seq_timer_set_skew()  argument
259 	if (snd_BUG_ON(!tmr))  in snd_seq_timer_set_skew()
267 	spin_lock_irqsave(&tmr->lock, flags);  in snd_seq_timer_set_skew()
268 	tmr->skew = skew;  in snd_seq_timer_set_skew()
269 	spin_unlock_irqrestore(&tmr->lock, flags);  in snd_seq_timer_set_skew()
276 	struct snd_seq_timer *tmr;  in snd_seq_timer_open()  local
280 	tmr = q->timer;  in snd_seq_timer_open()
281 	if (snd_BUG_ON(!tmr))  in snd_seq_timer_open()
283 	if (tmr->timeri)  in snd_seq_timer_open()
286 	if (tmr->type != SNDRV_SEQ_TIMER_ALSA)	/* standard ALSA timer */  in snd_seq_timer_open()
288 	if (tmr->alsa_id.dev_class != SNDRV_TIMER_CLASS_SLAVE)  in snd_seq_timer_open()
289 		tmr->alsa_id.dev_sclass = SNDRV_TIMER_SCLASS_SEQUENCER;  in snd_seq_timer_open()
290 	err = snd_timer_open(&t, str, &tmr->alsa_id, q->queue);  in snd_seq_timer_open()
291 	if (err < 0 && tmr->alsa_id.dev_class != SNDRV_TIMER_CLASS_SLAVE) {  in snd_seq_timer_open()
292 		if (tmr->alsa_id.dev_class != SNDRV_TIMER_CLASS_GLOBAL ||  in snd_seq_timer_open()
293 		    tmr->alsa_id.device != SNDRV_TIMER_GLOBAL_SYSTEM) {  in snd_seq_timer_open()
310 	spin_lock_irq(&tmr->lock);  in snd_seq_timer_open()
311 	tmr->timeri = t;  in snd_seq_timer_open()
312 	spin_unlock_irq(&tmr->lock);  in snd_seq_timer_open()
318 	struct snd_seq_timer *tmr;  in snd_seq_timer_close()  local
321 	tmr = q->timer;  in snd_seq_timer_close()
322 	if (snd_BUG_ON(!tmr))  in snd_seq_timer_close()
324 	spin_lock_irq(&tmr->lock);  in snd_seq_timer_close()
325 	t = tmr->timeri;  in snd_seq_timer_close()
326 	tmr->timeri = NULL;  in snd_seq_timer_close()
327 	spin_unlock_irq(&tmr->lock);  in snd_seq_timer_close()
333 static int seq_timer_stop(struct snd_seq_timer *tmr)  in seq_timer_stop()  argument
335 	if (! tmr->timeri)  in seq_timer_stop()
337 	if (!tmr->running)  in seq_timer_stop()
339 	tmr->running = 0;  in seq_timer_stop()
340 	snd_timer_pause(tmr->timeri);  in seq_timer_stop()
344 int snd_seq_timer_stop(struct snd_seq_timer *tmr)  in snd_seq_timer_stop()  argument
349 	spin_lock_irqsave(&tmr->lock, flags);  in snd_seq_timer_stop()
350 	err = seq_timer_stop(tmr);  in snd_seq_timer_stop()
351 	spin_unlock_irqrestore(&tmr->lock, flags);  in snd_seq_timer_stop()
355 static int initialize_timer(struct snd_seq_timer *tmr)  in initialize_timer()  argument
360 	t = tmr->timeri->timer;  in initialize_timer()
364 	freq = tmr->preferred_resolution;  in initialize_timer()
372 	tmr->ticks = 1;  in initialize_timer()
374 		unsigned long r = snd_timer_resolution(tmr->timeri);  in initialize_timer()
376 			tmr->ticks = (unsigned int)(1000000000uL / (r * freq));  in initialize_timer()
377 			if (! tmr->ticks)  in initialize_timer()
378 				tmr->ticks = 1;  in initialize_timer()
381 	tmr->initialized = 1;  in initialize_timer()
385 static int seq_timer_start(struct snd_seq_timer *tmr)  in seq_timer_start()  argument
387 	if (! tmr->timeri)  in seq_timer_start()
389 	if (tmr->running)  in seq_timer_start()
390 		seq_timer_stop(tmr);  in seq_timer_start()
391 	seq_timer_reset(tmr);  in seq_timer_start()
392 	if (initialize_timer(tmr) < 0)  in seq_timer_start()
394 	snd_timer_start(tmr->timeri, tmr->ticks);  in seq_timer_start()
395 	tmr->running = 1;  in seq_timer_start()
396 	ktime_get_ts64(&tmr->last_update);  in seq_timer_start()
400 int snd_seq_timer_start(struct snd_seq_timer *tmr)  in snd_seq_timer_start()  argument
405 	spin_lock_irqsave(&tmr->lock, flags);  in snd_seq_timer_start()
406 	err = seq_timer_start(tmr);  in snd_seq_timer_start()
407 	spin_unlock_irqrestore(&tmr->lock, flags);  in snd_seq_timer_start()
411 static int seq_timer_continue(struct snd_seq_timer *tmr)  in seq_timer_continue()  argument
413 	if (! tmr->timeri)  in seq_timer_continue()
415 	if (tmr->running)  in seq_timer_continue()
417 	if (! tmr->initialized) {  in seq_timer_continue()
418 		seq_timer_reset(tmr);  in seq_timer_continue()
419 		if (initialize_timer(tmr) < 0)  in seq_timer_continue()
422 	snd_timer_start(tmr->timeri, tmr->ticks);  in seq_timer_continue()
423 	tmr->running = 1;  in seq_timer_continue()
424 	ktime_get_ts64(&tmr->last_update);  in seq_timer_continue()
428 int snd_seq_timer_continue(struct snd_seq_timer *tmr)  in snd_seq_timer_continue()  argument
433 	spin_lock_irqsave(&tmr->lock, flags);  in snd_seq_timer_continue()
434 	err = seq_timer_continue(tmr);  in snd_seq_timer_continue()
435 	spin_unlock_irqrestore(&tmr->lock, flags);  in snd_seq_timer_continue()
440 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 (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
464 	return tmr->tick.cur_tick;  in snd_seq_timer_get_cur_tick()
475 	struct snd_seq_timer *tmr;  in snd_seq_info_timer_read()  local
483 		if ((tmr = q->timer) == NULL ||  in snd_seq_info_timer_read()
484 		    (ti = tmr->timeri) == NULL) {  in snd_seq_info_timer_read()
489 		resolution = snd_timer_resolution(ti) * tmr->ticks;  in snd_seq_info_timer_read()
491 		snd_iprintf(buffer, "  Skew : %u / %u\n", tmr->skew, tmr->skew_base);  in snd_seq_info_timer_read()