17  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
26 #include <linux/time.h>
61 static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;	/* Index 0-MAX */
63 static bool enable[SNDRV_CARDS] = {1, [1 ... (SNDRV_CARDS - 1)] = 0};
64 static char *model[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = NULL};
65 static int pcm_devs[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 1};
66 static int pcm_substreams[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 8};
67 //static int midi_devs[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 2};
82 MODULE_PARM_DESC(pcm_devs, "PCM devices # (0-4) for dummy driver.");
84 MODULE_PARM_DESC(pcm_substreams, "PCM substreams # (1-128) for dummy driver.");
86 //MODULE_PARM_DESC(midi_devs, "MIDI devices # (0-2) for dummy driver.");
113 	(*(const struct dummy_timer_ops **)(substream)->runtime->private_data)
210 	.buffer_bytes_max = ((65536-64)*8),
211 	.period_bytes_max = (65536-64),
241 	unsigned int frac_pos;	/* fractional sample position (based HZ) */
252 	mod_timer(&dpcm->timer, jiffies +  in dummy_systimer_rearm()
253 		(dpcm->frac_period_rest + dpcm->rate - 1) / dpcm->rate);  in dummy_systimer_rearm()
260 	delta = jiffies - dpcm->base_time;  in dummy_systimer_update()
263 	dpcm->base_time += delta;  in dummy_systimer_update()
264 	delta *= dpcm->rate;  in dummy_systimer_update()
265 	dpcm->frac_pos += delta;  in dummy_systimer_update()
266 	while (dpcm->frac_pos >= dpcm->frac_buffer_size)  in dummy_systimer_update()
267 		dpcm->frac_pos -= dpcm->frac_buffer_size;  in dummy_systimer_update()
268 	while (dpcm->frac_period_rest <= delta) {  in dummy_systimer_update()
269 		dpcm->elapsed++;  in dummy_systimer_update()
270 		dpcm->frac_period_rest += dpcm->frac_period_size;  in dummy_systimer_update()
272 	dpcm->frac_period_rest -= delta;  in dummy_systimer_update()
277 	struct dummy_systimer_pcm *dpcm = substream->runtime->private_data;  in dummy_systimer_start()
278 	spin_lock(&dpcm->lock);  in dummy_systimer_start()
279 	dpcm->base_time = jiffies;  in dummy_systimer_start()
281 	spin_unlock(&dpcm->lock);  in dummy_systimer_start()
287 	struct dummy_systimer_pcm *dpcm = substream->runtime->private_data;  in dummy_systimer_stop()
288 	spin_lock(&dpcm->lock);  in dummy_systimer_stop()
289 	del_timer(&dpcm->timer);  in dummy_systimer_stop()
290 	spin_unlock(&dpcm->lock);  in dummy_systimer_stop()
296 	struct snd_pcm_runtime *runtime = substream->runtime;  in dummy_systimer_prepare()
297 	struct dummy_systimer_pcm *dpcm = runtime->private_data;  in dummy_systimer_prepare()
299 	dpcm->frac_pos = 0;  in dummy_systimer_prepare()
300 	dpcm->rate = runtime->rate;  in dummy_systimer_prepare()
301 	dpcm->frac_buffer_size = runtime->buffer_size * HZ;  in dummy_systimer_prepare()
302 	dpcm->frac_period_size = runtime->period_size * HZ;  in dummy_systimer_prepare()
303 	dpcm->frac_period_rest = dpcm->frac_period_size;  in dummy_systimer_prepare()
304 	dpcm->elapsed = 0;  in dummy_systimer_prepare()
315 	spin_lock_irqsave(&dpcm->lock, flags);  in dummy_systimer_callback()
318 	elapsed = dpcm->elapsed;  in dummy_systimer_callback()
319 	dpcm->elapsed = 0;  in dummy_systimer_callback()
320 	spin_unlock_irqrestore(&dpcm->lock, flags);  in dummy_systimer_callback()
322 		snd_pcm_period_elapsed(dpcm->substream);  in dummy_systimer_callback()
328 	struct dummy_systimer_pcm *dpcm = substream->runtime->private_data;  in dummy_systimer_pointer()
331 	spin_lock(&dpcm->lock);  in dummy_systimer_pointer()
333 	pos = dpcm->frac_pos / HZ;  in dummy_systimer_pointer()
334 	spin_unlock(&dpcm->lock);  in dummy_systimer_pointer()
344 		return -ENOMEM;  in dummy_systimer_create()
345 	substream->runtime->private_data = dpcm;  in dummy_systimer_create()
346 	timer_setup(&dpcm->timer, dummy_systimer_callback, 0);  in dummy_systimer_create()
347 	spin_lock_init(&dpcm->lock);  in dummy_systimer_create()
348 	dpcm->substream = substream;  in dummy_systimer_create()
354 	kfree(substream->runtime->private_data);  in dummy_systimer_free()
386 	if (!atomic_read(&dpcm->running))  in dummy_hrtimer_callback()
392 	snd_pcm_period_elapsed(dpcm->substream);  in dummy_hrtimer_callback()
393 	if (!atomic_read(&dpcm->running))  in dummy_hrtimer_callback()
396 	hrtimer_forward_now(timer, dpcm->period_time);  in dummy_hrtimer_callback()
402 	struct dummy_hrtimer_pcm *dpcm = substream->runtime->private_data;  in dummy_hrtimer_start()
404 	dpcm->base_time = hrtimer_cb_get_time(&dpcm->timer);  in dummy_hrtimer_start()
405 	hrtimer_start(&dpcm->timer, dpcm->period_time, HRTIMER_MODE_REL_SOFT);  in dummy_hrtimer_start()
406 	atomic_set(&dpcm->running, 1);  in dummy_hrtimer_start()
412 	struct dummy_hrtimer_pcm *dpcm = substream->runtime->private_data;  in dummy_hrtimer_stop()
414 	atomic_set(&dpcm->running, 0);  in dummy_hrtimer_stop()
415 	if (!hrtimer_callback_running(&dpcm->timer))  in dummy_hrtimer_stop()
416 		hrtimer_cancel(&dpcm->timer);  in dummy_hrtimer_stop()
422 	hrtimer_cancel(&dpcm->timer);  in dummy_hrtimer_sync()
428 	struct snd_pcm_runtime *runtime = substream->runtime;  in dummy_hrtimer_pointer()
429 	struct dummy_hrtimer_pcm *dpcm = runtime->private_data;  in dummy_hrtimer_pointer()
433 	delta = ktime_us_delta(hrtimer_cb_get_time(&dpcm->timer),  in dummy_hrtimer_pointer()
434 			       dpcm->base_time);  in dummy_hrtimer_pointer()
435 	delta = div_u64(delta * runtime->rate + 999999, 1000000);  in dummy_hrtimer_pointer()
436 	div_u64_rem(delta, runtime->buffer_size, &pos);  in dummy_hrtimer_pointer()
442 	struct snd_pcm_runtime *runtime = substream->runtime;  in dummy_hrtimer_prepare()
443 	struct dummy_hrtimer_pcm *dpcm = runtime->private_data;  in dummy_hrtimer_prepare()
446 	unsigned long nsecs;  in dummy_hrtimer_prepare()  local
449 	period = runtime->period_size;  in dummy_hrtimer_prepare()
450 	rate = runtime->rate;  in dummy_hrtimer_prepare()
453 	nsecs = div_u64((u64)period * 1000000000UL + rate - 1, rate);  in dummy_hrtimer_prepare()
454 	dpcm->period_time = ktime_set(sec, nsecs);  in dummy_hrtimer_prepare()
465 		return -ENOMEM;  in dummy_hrtimer_create()
466 	substream->runtime->private_data = dpcm;  in dummy_hrtimer_create()
467 	hrtimer_init(&dpcm->timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL_SOFT);  in dummy_hrtimer_create()
468 	dpcm->timer.function = dummy_hrtimer_callback;  in dummy_hrtimer_create()
469 	dpcm->substream = substream;  in dummy_hrtimer_create()
470 	atomic_set(&dpcm->running, 0);  in dummy_hrtimer_create()
476 	struct dummy_hrtimer_pcm *dpcm = substream->runtime->private_data;  in dummy_hrtimer_free()
501 		return get_dummy_ops(substream)->start(substream);  in dummy_pcm_trigger()
504 		return get_dummy_ops(substream)->stop(substream);  in dummy_pcm_trigger()
506 	return -EINVAL;  in dummy_pcm_trigger()
511 	return get_dummy_ops(substream)->prepare(substream);  in dummy_pcm_prepare()
516 	return get_dummy_ops(substream)->pointer(substream);  in dummy_pcm_pointer()
542 		/* runtime->dma_bytes has to be set manually to allow mmap */  in dummy_pcm_hw_params()
543 		substream->runtime->dma_bytes = params_buffer_bytes(hw_params);  in dummy_pcm_hw_params()
560 	struct dummy_model *model = dummy->model;  in dummy_pcm_open()
561 	struct snd_pcm_runtime *runtime = substream->runtime;  in dummy_pcm_open()
571 	err = ops->create(substream);  in dummy_pcm_open()
576 	runtime->hw = dummy->pcm_hw;  in dummy_pcm_open()
577 	if (substream->pcm->device & 1) {  in dummy_pcm_open()
578 		runtime->hw.info &= ~SNDRV_PCM_INFO_INTERLEAVED;  in dummy_pcm_open()
579 		runtime->hw.info |= SNDRV_PCM_INFO_NONINTERLEAVED;  in dummy_pcm_open()
581 	if (substream->pcm->device & 2)  in dummy_pcm_open()
582 		runtime->hw.info &= ~(SNDRV_PCM_INFO_MMAP |  in dummy_pcm_open()
588 	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {  in dummy_pcm_open()
589 		if (model->playback_constraints)  in dummy_pcm_open()
590 			err = model->playback_constraints(substream->runtime);  in dummy_pcm_open()
592 		if (model->capture_constraints)  in dummy_pcm_open()
593 			err = model->capture_constraints(substream->runtime);  in dummy_pcm_open()
596 		get_dummy_ops(substream)->free(substream);  in dummy_pcm_open()
604 	get_dummy_ops(substream)->free(substream);  in dummy_pcm_close()
636 			return -ENOMEM;  in alloc_fake_buffer()
666 	return virt_to_page(dummy_page[substream->stream]); /* the same page */  in dummy_pcm_page()
702 	err = snd_pcm_new(dummy->card, "Dummy PCM", device,  in snd_card_dummy_pcm()
706 	dummy->pcm = pcm;  in snd_card_dummy_pcm()
713 	pcm->private_data = dummy;  in snd_card_dummy_pcm()
714 	pcm->info_flags = 0;  in snd_card_dummy_pcm()
715 	strcpy(pcm->name, "Dummy PCM");  in snd_card_dummy_pcm()
741 	uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;  in snd_dummy_volume_info()
742 	uinfo->count = 2;  in snd_dummy_volume_info()
743 	uinfo->value.integer.min = -50;  in snd_dummy_volume_info()
744 	uinfo->value.integer.max = 100;  in snd_dummy_volume_info()
752 	int addr = kcontrol->private_value;  in snd_dummy_volume_get()
754 	spin_lock_irq(&dummy->mixer_lock);  in snd_dummy_volume_get()
755 	ucontrol->value.integer.value[0] = dummy->mixer_volume[addr][0];  in snd_dummy_volume_get()
756 	ucontrol->value.integer.value[1] = dummy->mixer_volume[addr][1];  in snd_dummy_volume_get()
757 	spin_unlock_irq(&dummy->mixer_lock);  in snd_dummy_volume_get()
765 	int change, addr = kcontrol->private_value;  in snd_dummy_volume_put()
768 	left = ucontrol->value.integer.value[0];  in snd_dummy_volume_put()
769 	if (left < -50)  in snd_dummy_volume_put()
770 		left = -50;  in snd_dummy_volume_put()
773 	right = ucontrol->value.integer.value[1];  in snd_dummy_volume_put()
774 	if (right < -50)  in snd_dummy_volume_put()
775 		right = -50;  in snd_dummy_volume_put()
778 	spin_lock_irq(&dummy->mixer_lock);  in snd_dummy_volume_put()
779 	change = dummy->mixer_volume[addr][0] != left ||  in snd_dummy_volume_put()
780 	         dummy->mixer_volume[addr][1] != right;  in snd_dummy_volume_put()
781 	dummy->mixer_volume[addr][0] = left;  in snd_dummy_volume_put()
782 	dummy->mixer_volume[addr][1] = right;  in snd_dummy_volume_put()
783 	spin_unlock_irq(&dummy->mixer_lock);  in snd_dummy_volume_put()
787 static const DECLARE_TLV_DB_SCALE(db_scale_dummy, -4500, 30, 0);
801 	int addr = kcontrol->private_value;  in snd_dummy_capsrc_get()
803 	spin_lock_irq(&dummy->mixer_lock);  in snd_dummy_capsrc_get()
804 	ucontrol->value.integer.value[0] = dummy->capture_source[addr][0];  in snd_dummy_capsrc_get()
805 	ucontrol->value.integer.value[1] = dummy->capture_source[addr][1];  in snd_dummy_capsrc_get()
806 	spin_unlock_irq(&dummy->mixer_lock);  in snd_dummy_capsrc_get()
813 	int change, addr = kcontrol->private_value;  in snd_dummy_capsrc_put()
816 	left = ucontrol->value.integer.value[0] & 1;  in snd_dummy_capsrc_put()
817 	right = ucontrol->value.integer.value[1] & 1;  in snd_dummy_capsrc_put()
818 	spin_lock_irq(&dummy->mixer_lock);  in snd_dummy_capsrc_put()
819 	change = dummy->capture_source[addr][0] != left &&  in snd_dummy_capsrc_put()
820 	         dummy->capture_source[addr][1] != right;  in snd_dummy_capsrc_put()
821 	dummy->capture_source[addr][0] = left;  in snd_dummy_capsrc_put()
822 	dummy->capture_source[addr][1] = right;  in snd_dummy_capsrc_put()
823 	spin_unlock_irq(&dummy->mixer_lock);  in snd_dummy_capsrc_put()
840 	value->value.enumerated.item[0] = dummy->iobox;  in snd_dummy_iobox_get()
850 	if (value->value.enumerated.item[0] > 1)  in snd_dummy_iobox_put()
851 		return -EINVAL;  in snd_dummy_iobox_put()
853 	changed = value->value.enumerated.item[0] != dummy->iobox;  in snd_dummy_iobox_put()
855 		dummy->iobox = value->value.enumerated.item[0];  in snd_dummy_iobox_put()
857 		if (dummy->iobox) {  in snd_dummy_iobox_put()
858 			dummy->cd_volume_ctl->vd[0].access &=  in snd_dummy_iobox_put()
860 			dummy->cd_switch_ctl->vd[0].access &=  in snd_dummy_iobox_put()
863 			dummy->cd_volume_ctl->vd[0].access |=  in snd_dummy_iobox_put()
865 			dummy->cd_switch_ctl->vd[0].access |=  in snd_dummy_iobox_put()
869 		snd_ctl_notify(dummy->card, SNDRV_CTL_EVENT_MASK_INFO,  in snd_dummy_iobox_put()
870 			       &dummy->cd_volume_ctl->id);  in snd_dummy_iobox_put()
871 		snd_ctl_notify(dummy->card, SNDRV_CTL_EVENT_MASK_INFO,  in snd_dummy_iobox_put()
872 			       &dummy->cd_switch_ctl->id);  in snd_dummy_iobox_put()
900 	struct snd_card *card = dummy->card;  in snd_card_dummy_new_mixer()
905 	spin_lock_init(&dummy->mixer_lock);  in snd_card_dummy_new_mixer()
906 	strcpy(card->mixername, "Dummy Mixer");  in snd_card_dummy_new_mixer()
907 	dummy->iobox = 1;  in snd_card_dummy_new_mixer()
914 		if (!strcmp(kcontrol->id.name, "CD Volume"))  in snd_card_dummy_new_mixer()
915 			dummy->cd_volume_ctl = kcontrol;  in snd_card_dummy_new_mixer()
916 		else if (!strcmp(kcontrol->id.name, "CD Capture Switch"))  in snd_card_dummy_new_mixer()
917 			dummy->cd_switch_ctl = kcontrol;  in snd_card_dummy_new_mixer()
933 		if (dummy->pcm_hw.formats & (1ULL << i))  in print_formats()
947 	if (dummy->pcm_hw.rates & SNDRV_PCM_RATE_CONTINUOUS)  in print_rates()
949 	if (dummy->pcm_hw.rates & SNDRV_PCM_RATE_KNOT)  in print_rates()
952 		if (dummy->pcm_hw.rates & (1 << i))  in print_rates()
957 	(unsigned int *)((char *)&((dummy)->pcm_hw) + (ofs))
959 	(unsigned long long *)((char *)&((dummy)->pcm_hw) + (ofs))
990 	struct snd_dummy *dummy = entry->private_data;  in dummy_proc_read()
1012 	struct snd_dummy *dummy = entry->private_data;  in dummy_proc_write()
1042 	if (!snd_card_proc_new(chip->card, "dummy_pcm", &entry)) {  in dummy_proc_init()
1044 		entry->c.text.write = dummy_proc_write;  in dummy_proc_init()
1045 		entry->mode |= 0200;  in dummy_proc_init()
1046 		entry->private_data = chip;  in dummy_proc_init()
1059 	int dev = devptr->id;  in snd_dummy_probe()
1061 	err = snd_card_new(&devptr->dev, index[dev], id[dev], THIS_MODULE,  in snd_dummy_probe()
1065 	dummy = card->private_data;  in snd_dummy_probe()
1066 	dummy->card = card;  in snd_dummy_probe()
1068 		if (strcmp(model[dev], (*mdl)->name) == 0) {  in snd_dummy_probe()
1070 				"snd-dummy: Using model '%s' for card %i\n",  in snd_dummy_probe()
1071 				(*mdl)->name, card->number);  in snd_dummy_probe()
1072 			m = dummy->model = *mdl;  in snd_dummy_probe()
1086 	dummy->pcm_hw = dummy_pcm_hardware;  in snd_dummy_probe()
1088 		if (m->formats)  in snd_dummy_probe()
1089 			dummy->pcm_hw.formats = m->formats;  in snd_dummy_probe()
1090 		if (m->buffer_bytes_max)  in snd_dummy_probe()
1091 			dummy->pcm_hw.buffer_bytes_max = m->buffer_bytes_max;  in snd_dummy_probe()
1092 		if (m->period_bytes_min)  in snd_dummy_probe()
1093 			dummy->pcm_hw.period_bytes_min = m->period_bytes_min;  in snd_dummy_probe()
1094 		if (m->period_bytes_max)  in snd_dummy_probe()
1095 			dummy->pcm_hw.period_bytes_max = m->period_bytes_max;  in snd_dummy_probe()
1096 		if (m->periods_min)  in snd_dummy_probe()
1097 			dummy->pcm_hw.periods_min = m->periods_min;  in snd_dummy_probe()
1098 		if (m->periods_max)  in snd_dummy_probe()
1099 			dummy->pcm_hw.periods_max = m->periods_max;  in snd_dummy_probe()
1100 		if (m->rates)  in snd_dummy_probe()
1101 			dummy->pcm_hw.rates = m->rates;  in snd_dummy_probe()
1102 		if (m->rate_min)  in snd_dummy_probe()
1103 			dummy->pcm_hw.rate_min = m->rate_min;  in snd_dummy_probe()
1104 		if (m->rate_max)  in snd_dummy_probe()
1105 			dummy->pcm_hw.rate_max = m->rate_max;  in snd_dummy_probe()
1106 		if (m->channels_min)  in snd_dummy_probe()
1107 			dummy->pcm_hw.channels_min = m->channels_min;  in snd_dummy_probe()
1108 		if (m->channels_max)  in snd_dummy_probe()
1109 			dummy->pcm_hw.channels_max = m->channels_max;  in snd_dummy_probe()
1115 	strcpy(card->driver, "Dummy");  in snd_dummy_probe()
1116 	strcpy(card->shortname, "Dummy");  in snd_dummy_probe()
1117 	sprintf(card->longname, "Dummy %i", dev + 1);  in snd_dummy_probe()
1141 	struct snd_dummy *dummy = card->private_data;  in snd_dummy_suspend()
1144 	snd_pcm_suspend_all(dummy->pcm);  in snd_dummy_suspend()
1218 		return -ENODEV;  in alsa_card_dummy_init()