1 // SPDX-License-Identifier: GPL-2.0-or-later
12 #include <linux/time.h>
47 static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;	/* Index 0-MAX */
49 static bool enable[SNDRV_CARDS] = {1, [1 ... (SNDRV_CARDS - 1)] = 0};
50 static char *model[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = NULL};
51 static int pcm_devs[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 1};
52 static int pcm_substreams[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 8};
53 //static int midi_devs[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 2};
68 MODULE_PARM_DESC(pcm_devs, "PCM devices # (0-4) for dummy driver.");
70 MODULE_PARM_DESC(pcm_substreams, "PCM substreams # (1-128) for dummy driver.");
72 //MODULE_PARM_DESC(midi_devs, "MIDI devices # (0-2) for dummy driver.");
99 	(*(const struct dummy_timer_ops **)(substream)->runtime->private_data)
196 	.buffer_bytes_max = ((65536-64)*8),
197 	.period_bytes_max = (65536-64),
227 	unsigned int frac_pos;	/* fractional sample position (based HZ) */
238 	mod_timer(&dpcm->timer, jiffies +  in dummy_systimer_rearm()
239 		(dpcm->frac_period_rest + dpcm->rate - 1) / dpcm->rate);  in dummy_systimer_rearm()
246 	delta = jiffies - dpcm->base_time;  in dummy_systimer_update()
249 	dpcm->base_time += delta;  in dummy_systimer_update()
250 	delta *= dpcm->rate;  in dummy_systimer_update()
251 	dpcm->frac_pos += delta;  in dummy_systimer_update()
252 	while (dpcm->frac_pos >= dpcm->frac_buffer_size)  in dummy_systimer_update()
253 		dpcm->frac_pos -= dpcm->frac_buffer_size;  in dummy_systimer_update()
254 	while (dpcm->frac_period_rest <= delta) {  in dummy_systimer_update()
255 		dpcm->elapsed++;  in dummy_systimer_update()
256 		dpcm->frac_period_rest += dpcm->frac_period_size;  in dummy_systimer_update()
258 	dpcm->frac_period_rest -= delta;  in dummy_systimer_update()
263 	struct dummy_systimer_pcm *dpcm = substream->runtime->private_data;  in dummy_systimer_start()
264 	spin_lock(&dpcm->lock);  in dummy_systimer_start()
265 	dpcm->base_time = jiffies;  in dummy_systimer_start()
267 	spin_unlock(&dpcm->lock);  in dummy_systimer_start()
273 	struct dummy_systimer_pcm *dpcm = substream->runtime->private_data;  in dummy_systimer_stop()
274 	spin_lock(&dpcm->lock);  in dummy_systimer_stop()
275 	del_timer(&dpcm->timer);  in dummy_systimer_stop()
276 	spin_unlock(&dpcm->lock);  in dummy_systimer_stop()
282 	struct snd_pcm_runtime *runtime = substream->runtime;  in dummy_systimer_prepare()
283 	struct dummy_systimer_pcm *dpcm = runtime->private_data;  in dummy_systimer_prepare()
285 	dpcm->frac_pos = 0;  in dummy_systimer_prepare()
286 	dpcm->rate = runtime->rate;  in dummy_systimer_prepare()
287 	dpcm->frac_buffer_size = runtime->buffer_size * HZ;  in dummy_systimer_prepare()
288 	dpcm->frac_period_size = runtime->period_size * HZ;  in dummy_systimer_prepare()
289 	dpcm->frac_period_rest = dpcm->frac_period_size;  in dummy_systimer_prepare()
290 	dpcm->elapsed = 0;  in dummy_systimer_prepare()
301 	spin_lock_irqsave(&dpcm->lock, flags);  in dummy_systimer_callback()
304 	elapsed = dpcm->elapsed;  in dummy_systimer_callback()
305 	dpcm->elapsed = 0;  in dummy_systimer_callback()
306 	spin_unlock_irqrestore(&dpcm->lock, flags);  in dummy_systimer_callback()
308 		snd_pcm_period_elapsed(dpcm->substream);  in dummy_systimer_callback()
314 	struct dummy_systimer_pcm *dpcm = substream->runtime->private_data;  in dummy_systimer_pointer()
317 	spin_lock(&dpcm->lock);  in dummy_systimer_pointer()
319 	pos = dpcm->frac_pos / HZ;  in dummy_systimer_pointer()
320 	spin_unlock(&dpcm->lock);  in dummy_systimer_pointer()
330 		return -ENOMEM;  in dummy_systimer_create()
331 	substream->runtime->private_data = dpcm;  in dummy_systimer_create()
332 	timer_setup(&dpcm->timer, dummy_systimer_callback, 0);  in dummy_systimer_create()
333 	spin_lock_init(&dpcm->lock);  in dummy_systimer_create()
334 	dpcm->substream = substream;  in dummy_systimer_create()
340 	kfree(substream->runtime->private_data);  in dummy_systimer_free()
372 	if (!atomic_read(&dpcm->running))  in dummy_hrtimer_callback()
378 	snd_pcm_period_elapsed(dpcm->substream);  in dummy_hrtimer_callback()
379 	if (!atomic_read(&dpcm->running))  in dummy_hrtimer_callback()
382 	hrtimer_forward_now(timer, dpcm->period_time);  in dummy_hrtimer_callback()
388 	struct dummy_hrtimer_pcm *dpcm = substream->runtime->private_data;  in dummy_hrtimer_start()
390 	dpcm->base_time = hrtimer_cb_get_time(&dpcm->timer);  in dummy_hrtimer_start()
391 	hrtimer_start(&dpcm->timer, dpcm->period_time, HRTIMER_MODE_REL_SOFT);  in dummy_hrtimer_start()
392 	atomic_set(&dpcm->running, 1);  in dummy_hrtimer_start()
398 	struct dummy_hrtimer_pcm *dpcm = substream->runtime->private_data;  in dummy_hrtimer_stop()
400 	atomic_set(&dpcm->running, 0);  in dummy_hrtimer_stop()
401 	if (!hrtimer_callback_running(&dpcm->timer))  in dummy_hrtimer_stop()
402 		hrtimer_cancel(&dpcm->timer);  in dummy_hrtimer_stop()
408 	hrtimer_cancel(&dpcm->timer);  in dummy_hrtimer_sync()
414 	struct snd_pcm_runtime *runtime = substream->runtime;  in dummy_hrtimer_pointer()
415 	struct dummy_hrtimer_pcm *dpcm = runtime->private_data;  in dummy_hrtimer_pointer()
419 	delta = ktime_us_delta(hrtimer_cb_get_time(&dpcm->timer),  in dummy_hrtimer_pointer()
420 			       dpcm->base_time);  in dummy_hrtimer_pointer()
421 	delta = div_u64(delta * runtime->rate + 999999, 1000000);  in dummy_hrtimer_pointer()
422 	div_u64_rem(delta, runtime->buffer_size, &pos);  in dummy_hrtimer_pointer()
428 	struct snd_pcm_runtime *runtime = substream->runtime;  in dummy_hrtimer_prepare()
429 	struct dummy_hrtimer_pcm *dpcm = runtime->private_data;  in dummy_hrtimer_prepare()
432 	unsigned long nsecs;  in dummy_hrtimer_prepare()  local
435 	period = runtime->period_size;  in dummy_hrtimer_prepare()
436 	rate = runtime->rate;  in dummy_hrtimer_prepare()
439 	nsecs = div_u64((u64)period * 1000000000UL + rate - 1, rate);  in dummy_hrtimer_prepare()
440 	dpcm->period_time = ktime_set(sec, nsecs);  in dummy_hrtimer_prepare()
451 		return -ENOMEM;  in dummy_hrtimer_create()
452 	substream->runtime->private_data = dpcm;  in dummy_hrtimer_create()
453 	hrtimer_init(&dpcm->timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL_SOFT);  in dummy_hrtimer_create()
454 	dpcm->timer.function = dummy_hrtimer_callback;  in dummy_hrtimer_create()
455 	dpcm->substream = substream;  in dummy_hrtimer_create()
456 	atomic_set(&dpcm->running, 0);  in dummy_hrtimer_create()
462 	struct dummy_hrtimer_pcm *dpcm = substream->runtime->private_data;  in dummy_hrtimer_free()
487 		return get_dummy_ops(substream)->start(substream);  in dummy_pcm_trigger()
490 		return get_dummy_ops(substream)->stop(substream);  in dummy_pcm_trigger()
492 	return -EINVAL;  in dummy_pcm_trigger()
497 	return get_dummy_ops(substream)->prepare(substream);  in dummy_pcm_prepare()
502 	return get_dummy_ops(substream)->pointer(substream);  in dummy_pcm_pointer()
528 		/* runtime->dma_bytes has to be set manually to allow mmap */  in dummy_pcm_hw_params()
529 		substream->runtime->dma_bytes = params_buffer_bytes(hw_params);  in dummy_pcm_hw_params()
538 	const struct dummy_model *model = dummy->model;  in dummy_pcm_open()
539 	struct snd_pcm_runtime *runtime = substream->runtime;  in dummy_pcm_open()
549 	err = ops->create(substream);  in dummy_pcm_open()
554 	runtime->hw = dummy->pcm_hw;  in dummy_pcm_open()
555 	if (substream->pcm->device & 1) {  in dummy_pcm_open()
556 		runtime->hw.info &= ~SNDRV_PCM_INFO_INTERLEAVED;  in dummy_pcm_open()
557 		runtime->hw.info |= SNDRV_PCM_INFO_NONINTERLEAVED;  in dummy_pcm_open()
559 	if (substream->pcm->device & 2)  in dummy_pcm_open()
560 		runtime->hw.info &= ~(SNDRV_PCM_INFO_MMAP |  in dummy_pcm_open()
566 	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {  in dummy_pcm_open()
567 		if (model->playback_constraints)  in dummy_pcm_open()
568 			err = model->playback_constraints(substream->runtime);  in dummy_pcm_open()
570 		if (model->capture_constraints)  in dummy_pcm_open()
571 			err = model->capture_constraints(substream->runtime);  in dummy_pcm_open()
574 		get_dummy_ops(substream)->free(substream);  in dummy_pcm_open()
582 	get_dummy_ops(substream)->free(substream);  in dummy_pcm_close()
614 			return -ENOMEM;  in alloc_fake_buffer()
644 	return virt_to_page(dummy_page[substream->stream]); /* the same page */  in dummy_pcm_page()
676 	err = snd_pcm_new(dummy->card, "Dummy PCM", device,  in snd_card_dummy_pcm()
680 	dummy->pcm = pcm;  in snd_card_dummy_pcm()
687 	pcm->private_data = dummy;  in snd_card_dummy_pcm()
688 	pcm->info_flags = 0;  in snd_card_dummy_pcm()
689 	strcpy(pcm->name, "Dummy PCM");  in snd_card_dummy_pcm()
715 	uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;  in snd_dummy_volume_info()
716 	uinfo->count = 2;  in snd_dummy_volume_info()
717 	uinfo->value.integer.min = -50;  in snd_dummy_volume_info()
718 	uinfo->value.integer.max = 100;  in snd_dummy_volume_info()
726 	int addr = kcontrol->private_value;  in snd_dummy_volume_get()
728 	spin_lock_irq(&dummy->mixer_lock);  in snd_dummy_volume_get()
729 	ucontrol->value.integer.value[0] = dummy->mixer_volume[addr][0];  in snd_dummy_volume_get()
730 	ucontrol->value.integer.value[1] = dummy->mixer_volume[addr][1];  in snd_dummy_volume_get()
731 	spin_unlock_irq(&dummy->mixer_lock);  in snd_dummy_volume_get()
739 	int change, addr = kcontrol->private_value;  in snd_dummy_volume_put()
742 	left = ucontrol->value.integer.value[0];  in snd_dummy_volume_put()
743 	if (left < -50)  in snd_dummy_volume_put()
744 		left = -50;  in snd_dummy_volume_put()
747 	right = ucontrol->value.integer.value[1];  in snd_dummy_volume_put()
748 	if (right < -50)  in snd_dummy_volume_put()
749 		right = -50;  in snd_dummy_volume_put()
752 	spin_lock_irq(&dummy->mixer_lock);  in snd_dummy_volume_put()
753 	change = dummy->mixer_volume[addr][0] != left ||  in snd_dummy_volume_put()
754 	         dummy->mixer_volume[addr][1] != right;  in snd_dummy_volume_put()
755 	dummy->mixer_volume[addr][0] = left;  in snd_dummy_volume_put()
756 	dummy->mixer_volume[addr][1] = right;  in snd_dummy_volume_put()
757 	spin_unlock_irq(&dummy->mixer_lock);  in snd_dummy_volume_put()
761 static const DECLARE_TLV_DB_SCALE(db_scale_dummy, -4500, 30, 0);
775 	int addr = kcontrol->private_value;  in snd_dummy_capsrc_get()
777 	spin_lock_irq(&dummy->mixer_lock);  in snd_dummy_capsrc_get()
778 	ucontrol->value.integer.value[0] = dummy->capture_source[addr][0];  in snd_dummy_capsrc_get()
779 	ucontrol->value.integer.value[1] = dummy->capture_source[addr][1];  in snd_dummy_capsrc_get()
780 	spin_unlock_irq(&dummy->mixer_lock);  in snd_dummy_capsrc_get()
787 	int change, addr = kcontrol->private_value;  in snd_dummy_capsrc_put()
790 	left = ucontrol->value.integer.value[0] & 1;  in snd_dummy_capsrc_put()
791 	right = ucontrol->value.integer.value[1] & 1;  in snd_dummy_capsrc_put()
792 	spin_lock_irq(&dummy->mixer_lock);  in snd_dummy_capsrc_put()
793 	change = dummy->capture_source[addr][0] != left &&  in snd_dummy_capsrc_put()
794 	         dummy->capture_source[addr][1] != right;  in snd_dummy_capsrc_put()
795 	dummy->capture_source[addr][0] = left;  in snd_dummy_capsrc_put()
796 	dummy->capture_source[addr][1] = right;  in snd_dummy_capsrc_put()
797 	spin_unlock_irq(&dummy->mixer_lock);  in snd_dummy_capsrc_put()
814 	value->value.enumerated.item[0] = dummy->iobox;  in snd_dummy_iobox_get()
824 	if (value->value.enumerated.item[0] > 1)  in snd_dummy_iobox_put()
825 		return -EINVAL;  in snd_dummy_iobox_put()
827 	changed = value->value.enumerated.item[0] != dummy->iobox;  in snd_dummy_iobox_put()
829 		dummy->iobox = value->value.enumerated.item[0];  in snd_dummy_iobox_put()
831 		if (dummy->iobox) {  in snd_dummy_iobox_put()
832 			dummy->cd_volume_ctl->vd[0].access &=  in snd_dummy_iobox_put()
834 			dummy->cd_switch_ctl->vd[0].access &=  in snd_dummy_iobox_put()
837 			dummy->cd_volume_ctl->vd[0].access |=  in snd_dummy_iobox_put()
839 			dummy->cd_switch_ctl->vd[0].access |=  in snd_dummy_iobox_put()
843 		snd_ctl_notify(dummy->card, SNDRV_CTL_EVENT_MASK_INFO,  in snd_dummy_iobox_put()
844 			       &dummy->cd_volume_ctl->id);  in snd_dummy_iobox_put()
845 		snd_ctl_notify(dummy->card, SNDRV_CTL_EVENT_MASK_INFO,  in snd_dummy_iobox_put()
846 			       &dummy->cd_switch_ctl->id);  in snd_dummy_iobox_put()
874 	struct snd_card *card = dummy->card;  in snd_card_dummy_new_mixer()
879 	spin_lock_init(&dummy->mixer_lock);  in snd_card_dummy_new_mixer()
880 	strcpy(card->mixername, "Dummy Mixer");  in snd_card_dummy_new_mixer()
881 	dummy->iobox = 1;  in snd_card_dummy_new_mixer()
888 		if (!strcmp(kcontrol->id.name, "CD Volume"))  in snd_card_dummy_new_mixer()
889 			dummy->cd_volume_ctl = kcontrol;  in snd_card_dummy_new_mixer()
890 		else if (!strcmp(kcontrol->id.name, "CD Capture Switch"))  in snd_card_dummy_new_mixer()
891 			dummy->cd_switch_ctl = kcontrol;  in snd_card_dummy_new_mixer()
907 		if (dummy->pcm_hw.formats & pcm_format_to_bits(i))  in print_formats()
921 	if (dummy->pcm_hw.rates & SNDRV_PCM_RATE_CONTINUOUS)  in print_rates()
923 	if (dummy->pcm_hw.rates & SNDRV_PCM_RATE_KNOT)  in print_rates()
926 		if (dummy->pcm_hw.rates & (1 << i))  in print_rates()
931 	(unsigned int *)((char *)&((dummy)->pcm_hw) + (ofs))
933 	(unsigned long long *)((char *)&((dummy)->pcm_hw) + (ofs))
964 	struct snd_dummy *dummy = entry->private_data;  in dummy_proc_read()
986 	struct snd_dummy *dummy = entry->private_data;  in dummy_proc_write()
1014 	snd_card_rw_proc_new(chip->card, "dummy_pcm", chip,  in dummy_proc_init()
1027 	int dev = devptr->id;  in snd_dummy_probe()
1029 	err = snd_card_new(&devptr->dev, index[dev], id[dev], THIS_MODULE,  in snd_dummy_probe()
1033 	dummy = card->private_data;  in snd_dummy_probe()
1034 	dummy->card = card;  in snd_dummy_probe()
1036 		if (strcmp(model[dev], (*mdl)->name) == 0) {  in snd_dummy_probe()
1038 				"snd-dummy: Using model '%s' for card %i\n",  in snd_dummy_probe()
1039 				(*mdl)->name, card->number);  in snd_dummy_probe()
1040 			m = dummy->model = *mdl;  in snd_dummy_probe()
1054 	dummy->pcm_hw = dummy_pcm_hardware;  in snd_dummy_probe()
1056 		if (m->formats)  in snd_dummy_probe()
1057 			dummy->pcm_hw.formats = m->formats;  in snd_dummy_probe()
1058 		if (m->buffer_bytes_max)  in snd_dummy_probe()
1059 			dummy->pcm_hw.buffer_bytes_max = m->buffer_bytes_max;  in snd_dummy_probe()
1060 		if (m->period_bytes_min)  in snd_dummy_probe()
1061 			dummy->pcm_hw.period_bytes_min = m->period_bytes_min;  in snd_dummy_probe()
1062 		if (m->period_bytes_max)  in snd_dummy_probe()
1063 			dummy->pcm_hw.period_bytes_max = m->period_bytes_max;  in snd_dummy_probe()
1064 		if (m->periods_min)  in snd_dummy_probe()
1065 			dummy->pcm_hw.periods_min = m->periods_min;  in snd_dummy_probe()
1066 		if (m->periods_max)  in snd_dummy_probe()
1067 			dummy->pcm_hw.periods_max = m->periods_max;  in snd_dummy_probe()
1068 		if (m->rates)  in snd_dummy_probe()
1069 			dummy->pcm_hw.rates = m->rates;  in snd_dummy_probe()
1070 		if (m->rate_min)  in snd_dummy_probe()
1071 			dummy->pcm_hw.rate_min = m->rate_min;  in snd_dummy_probe()
1072 		if (m->rate_max)  in snd_dummy_probe()
1073 			dummy->pcm_hw.rate_max = m->rate_max;  in snd_dummy_probe()
1074 		if (m->channels_min)  in snd_dummy_probe()
1075 			dummy->pcm_hw.channels_min = m->channels_min;  in snd_dummy_probe()
1076 		if (m->channels_max)  in snd_dummy_probe()
1077 			dummy->pcm_hw.channels_max = m->channels_max;  in snd_dummy_probe()
1083 	strcpy(card->driver, "Dummy");  in snd_dummy_probe()
1084 	strcpy(card->shortname, "Dummy");  in snd_dummy_probe()
1085 	sprintf(card->longname, "Dummy %i", dev + 1);  in snd_dummy_probe()
1184 		return -ENODEV;  in alsa_card_dummy_init()