1 // SPDX-License-Identifier: GPL-2.0-or-later
5  * Copyright 2012-2013 (C) M2TECH S.r.l and Amarula Solutions B.V.
53 	bool panic; /* if set driver won't do anymore pcm on device */
114 	struct usb_device *device = rt->chip->dev;  in hiface_pcm_set_rate()  local
147 		dev_err(&device->dev, "Unsupported rate %d\n", rate);  in hiface_pcm_set_rate()
148 		return -EINVAL;  in hiface_pcm_set_rate()
159 	ret = usb_control_msg_send(device, 0,  in hiface_pcm_set_rate()
164 		dev_err(&device->dev, "Error setting samplerate %d.\n", rate);  in hiface_pcm_set_rate()
173 	struct device *device = &rt->chip->dev->dev;  in hiface_pcm_get_substream()  local
175 	if (alsa_sub->stream == SNDRV_PCM_STREAM_PLAYBACK)  in hiface_pcm_get_substream()
176 		return &rt->playback;  in hiface_pcm_get_substream()
178 	dev_err(device, "Error getting pcm substream slot.\n");  in hiface_pcm_get_substream()
187 	if (rt->stream_state != STREAM_DISABLED) {  in hiface_pcm_stream_stop()
188 		rt->stream_state = STREAM_STOPPING;  in hiface_pcm_stream_stop()
192 					&rt->out_urbs[i].submitted, 100);  in hiface_pcm_stream_stop()
195 					&rt->out_urbs[i].submitted);  in hiface_pcm_stream_stop()
196 			usb_kill_urb(&rt->out_urbs[i].instance);  in hiface_pcm_stream_stop()
199 		rt->stream_state = STREAM_DISABLED;  in hiface_pcm_stream_stop()
209 	if (rt->stream_state == STREAM_DISABLED) {  in hiface_pcm_stream_start()
212 		rt->panic = false;  in hiface_pcm_stream_start()
215 		rt->stream_state = STREAM_STARTING;  in hiface_pcm_stream_start()
217 			memset(rt->out_urbs[i].buffer, 0, PCM_PACKET_SIZE);  in hiface_pcm_stream_start()
218 			usb_anchor_urb(&rt->out_urbs[i].instance,  in hiface_pcm_stream_start()
219 				       &rt->out_urbs[i].submitted);  in hiface_pcm_stream_start()
220 			ret = usb_submit_urb(&rt->out_urbs[i].instance,  in hiface_pcm_stream_start()
229 		wait_event_timeout(rt->stream_wait_queue, rt->stream_wait_cond,  in hiface_pcm_stream_start()
231 		if (rt->stream_wait_cond) {  in hiface_pcm_stream_start()
232 			struct device *device = &rt->chip->dev->dev;  in hiface_pcm_stream_start()  local
233 			dev_dbg(device, "%s: Stream is running wakeup event\n",  in hiface_pcm_stream_start()
235 			rt->stream_state = STREAM_RUNNING;  in hiface_pcm_stream_start()
238 			return -EIO;  in hiface_pcm_stream_start()
244 /* The hardware wants word-swapped 32-bit values */
255 static bool hiface_pcm_playback(struct pcm_substream *sub, struct pcm_urb *urb)  in hiface_pcm_playback()  argument
257 	struct snd_pcm_runtime *alsa_rt = sub->instance->runtime;  in hiface_pcm_playback()
258 	struct device *device = &urb->chip->dev->dev;  in hiface_pcm_playback()  local
262 	WARN_ON(alsa_rt->format != SNDRV_PCM_FORMAT_S32_LE);  in hiface_pcm_playback()
264 	pcm_buffer_size = snd_pcm_lib_buffer_bytes(sub->instance);  in hiface_pcm_playback()
266 	if (sub->dma_off + PCM_PACKET_SIZE <= pcm_buffer_size) {  in hiface_pcm_playback()
267 		dev_dbg(device, "%s: (1) buffer_size %#x dma_offset %#x\n", __func__,  in hiface_pcm_playback()
269 			 (unsigned int) sub->dma_off);  in hiface_pcm_playback()
271 		source = alsa_rt->dma_area + sub->dma_off;  in hiface_pcm_playback()
272 		memcpy_swahw32(urb->buffer, source, PCM_PACKET_SIZE);  in hiface_pcm_playback()
277 		dev_dbg(device, "%s: (2) buffer_size %#x dma_offset %#x\n", __func__,  in hiface_pcm_playback()
279 			 (unsigned int) sub->dma_off);  in hiface_pcm_playback()
281 		len = pcm_buffer_size - sub->dma_off;  in hiface_pcm_playback()
283 		source = alsa_rt->dma_area + sub->dma_off;  in hiface_pcm_playback()
284 		memcpy_swahw32(urb->buffer, source, len);  in hiface_pcm_playback()
286 		source = alsa_rt->dma_area;  in hiface_pcm_playback()
287 		memcpy_swahw32(urb->buffer + len, source,  in hiface_pcm_playback()
288 			       PCM_PACKET_SIZE - len);  in hiface_pcm_playback()
290 	sub->dma_off += PCM_PACKET_SIZE;  in hiface_pcm_playback()
291 	if (sub->dma_off >= pcm_buffer_size)  in hiface_pcm_playback()
292 		sub->dma_off -= pcm_buffer_size;  in hiface_pcm_playback()
294 	sub->period_off += PCM_PACKET_SIZE;  in hiface_pcm_playback()
295 	if (sub->period_off >= alsa_rt->period_size) {  in hiface_pcm_playback()
296 		sub->period_off %= alsa_rt->period_size;  in hiface_pcm_playback()
304 	struct pcm_urb *out_urb = usb_urb->context;  in hiface_pcm_out_urb_handler()
305 	struct pcm_runtime *rt = out_urb->chip->pcm;  in hiface_pcm_out_urb_handler()
306 	struct pcm_substream *sub;  in hiface_pcm_out_urb_handler()  local
311 	if (rt->panic || rt->stream_state == STREAM_STOPPING)  in hiface_pcm_out_urb_handler()
314 	if (unlikely(usb_urb->status == -ENOENT ||	/* unlinked */  in hiface_pcm_out_urb_handler()
315 		     usb_urb->status == -ENODEV ||	/* device removed */  in hiface_pcm_out_urb_handler()
316 		     usb_urb->status == -ECONNRESET ||	/* unlinked */  in hiface_pcm_out_urb_handler()
317 		     usb_urb->status == -ESHUTDOWN)) {	/* device disabled */  in hiface_pcm_out_urb_handler()
321 	if (rt->stream_state == STREAM_STARTING) {  in hiface_pcm_out_urb_handler()
322 		rt->stream_wait_cond = true;  in hiface_pcm_out_urb_handler()
323 		wake_up(&rt->stream_wait_queue);  in hiface_pcm_out_urb_handler()
327 	sub = &rt->playback;  in hiface_pcm_out_urb_handler()
328 	spin_lock_irqsave(&sub->lock, flags);  in hiface_pcm_out_urb_handler()
329 	if (sub->active)  in hiface_pcm_out_urb_handler()
330 		do_period_elapsed = hiface_pcm_playback(sub, out_urb);  in hiface_pcm_out_urb_handler()
332 		memset(out_urb->buffer, 0, PCM_PACKET_SIZE);  in hiface_pcm_out_urb_handler()
334 	spin_unlock_irqrestore(&sub->lock, flags);  in hiface_pcm_out_urb_handler()
337 		snd_pcm_period_elapsed(sub->instance);  in hiface_pcm_out_urb_handler()
339 	ret = usb_submit_urb(&out_urb->instance, GFP_ATOMIC);  in hiface_pcm_out_urb_handler()
346 	rt->panic = true;  in hiface_pcm_out_urb_handler()
352 	struct pcm_substream *sub = NULL;  in hiface_pcm_open()  local
353 	struct snd_pcm_runtime *alsa_rt = alsa_sub->runtime;  in hiface_pcm_open()
356 	if (rt->panic)  in hiface_pcm_open()
357 		return -EPIPE;  in hiface_pcm_open()
359 	mutex_lock(&rt->stream_mutex);  in hiface_pcm_open()
360 	alsa_rt->hw = pcm_hw;  in hiface_pcm_open()
362 	if (alsa_sub->stream == SNDRV_PCM_STREAM_PLAYBACK)  in hiface_pcm_open()
363 		sub = &rt->playback;  in hiface_pcm_open()
365 	if (!sub) {  in hiface_pcm_open()
366 		struct device *device = &rt->chip->dev->dev;  in hiface_pcm_open()  local
367 		mutex_unlock(&rt->stream_mutex);  in hiface_pcm_open()
368 		dev_err(device, "Invalid stream type\n");  in hiface_pcm_open()
369 		return -EINVAL;  in hiface_pcm_open()
372 	if (rt->extra_freq) {  in hiface_pcm_open()
373 		alsa_rt->hw.rates |= SNDRV_PCM_RATE_KNOT;  in hiface_pcm_open()
374 		alsa_rt->hw.rate_max = 384000;  in hiface_pcm_open()
377 		ret = snd_pcm_hw_constraint_list(alsa_sub->runtime, 0,  in hiface_pcm_open()
381 			mutex_unlock(&rt->stream_mutex);  in hiface_pcm_open()
386 	sub->instance = alsa_sub;  in hiface_pcm_open()
387 	sub->active = false;  in hiface_pcm_open()
388 	mutex_unlock(&rt->stream_mutex);  in hiface_pcm_open()
395 	struct pcm_substream *sub = hiface_pcm_get_substream(alsa_sub);  in hiface_pcm_close()  local
398 	if (rt->panic)  in hiface_pcm_close()
401 	mutex_lock(&rt->stream_mutex);  in hiface_pcm_close()
402 	if (sub) {  in hiface_pcm_close()
406 		spin_lock_irqsave(&sub->lock, flags);  in hiface_pcm_close()
407 		sub->instance = NULL;  in hiface_pcm_close()
408 		sub->active = false;  in hiface_pcm_close()
409 		spin_unlock_irqrestore(&sub->lock, flags);  in hiface_pcm_close()
412 	mutex_unlock(&rt->stream_mutex);  in hiface_pcm_close()
419 	struct pcm_substream *sub = hiface_pcm_get_substream(alsa_sub);  in hiface_pcm_prepare()  local
420 	struct snd_pcm_runtime *alsa_rt = alsa_sub->runtime;  in hiface_pcm_prepare()
423 	if (rt->panic)  in hiface_pcm_prepare()
424 		return -EPIPE;  in hiface_pcm_prepare()
425 	if (!sub)  in hiface_pcm_prepare()
426 		return -ENODEV;  in hiface_pcm_prepare()
428 	mutex_lock(&rt->stream_mutex);  in hiface_pcm_prepare()
432 	sub->dma_off = 0;  in hiface_pcm_prepare()
433 	sub->period_off = 0;  in hiface_pcm_prepare()
435 	if (rt->stream_state == STREAM_DISABLED) {  in hiface_pcm_prepare()
437 		ret = hiface_pcm_set_rate(rt, alsa_rt->rate);  in hiface_pcm_prepare()
439 			mutex_unlock(&rt->stream_mutex);  in hiface_pcm_prepare()
444 			mutex_unlock(&rt->stream_mutex);  in hiface_pcm_prepare()
448 	mutex_unlock(&rt->stream_mutex);  in hiface_pcm_prepare()
454 	struct pcm_substream *sub = hiface_pcm_get_substream(alsa_sub);  in hiface_pcm_trigger()  local
457 	if (rt->panic)  in hiface_pcm_trigger()
458 		return -EPIPE;  in hiface_pcm_trigger()
459 	if (!sub)  in hiface_pcm_trigger()
460 		return -ENODEV;  in hiface_pcm_trigger()
465 		spin_lock_irq(&sub->lock);  in hiface_pcm_trigger()
466 		sub->active = true;  in hiface_pcm_trigger()
467 		spin_unlock_irq(&sub->lock);  in hiface_pcm_trigger()
472 		spin_lock_irq(&sub->lock);  in hiface_pcm_trigger()
473 		sub->active = false;  in hiface_pcm_trigger()
474 		spin_unlock_irq(&sub->lock);  in hiface_pcm_trigger()
478 		return -EINVAL;  in hiface_pcm_trigger()
484 	struct pcm_substream *sub = hiface_pcm_get_substream(alsa_sub);  in hiface_pcm_pointer()  local
489 	if (rt->panic || !sub)  in hiface_pcm_pointer()
492 	spin_lock_irqsave(&sub->lock, flags);  in hiface_pcm_pointer()
493 	dma_offset = sub->dma_off;  in hiface_pcm_pointer()
494 	spin_unlock_irqrestore(&sub->lock, flags);  in hiface_pcm_pointer()
495 	return bytes_to_frames(alsa_sub->runtime, dma_offset);  in hiface_pcm_pointer()
511 	urb->chip = chip;  in hiface_pcm_init_urb()
512 	usb_init_urb(&urb->instance);  in hiface_pcm_init_urb()
514 	urb->buffer = kzalloc(PCM_PACKET_SIZE, GFP_KERNEL);  in hiface_pcm_init_urb()
515 	if (!urb->buffer)  in hiface_pcm_init_urb()
516 		return -ENOMEM;  in hiface_pcm_init_urb()
518 	usb_fill_bulk_urb(&urb->instance, chip->dev,  in hiface_pcm_init_urb()
519 			  usb_sndbulkpipe(chip->dev, ep), (void *)urb->buffer,  in hiface_pcm_init_urb()
521 	if (usb_urb_ep_type_check(&urb->instance))  in hiface_pcm_init_urb()
522 		return -EINVAL;  in hiface_pcm_init_urb()
523 	init_usb_anchor(&urb->submitted);  in hiface_pcm_init_urb()
530 	struct pcm_runtime *rt = chip->pcm;  in hiface_pcm_abort()
533 		rt->panic = true;  in hiface_pcm_abort()
535 		mutex_lock(&rt->stream_mutex);  in hiface_pcm_abort()
537 		mutex_unlock(&rt->stream_mutex);  in hiface_pcm_abort()
543 	struct pcm_runtime *rt = chip->pcm;  in hiface_pcm_destroy()
547 		kfree(rt->out_urbs[i].buffer);  in hiface_pcm_destroy()
549 	kfree(chip->pcm);  in hiface_pcm_destroy()
550 	chip->pcm = NULL;  in hiface_pcm_destroy()
555 	struct pcm_runtime *rt = pcm->private_data;  in hiface_pcm_free()
558 		hiface_pcm_destroy(rt->chip);  in hiface_pcm_free()
570 		return -ENOMEM;  in hiface_pcm_init()
572 	rt->chip = chip;  in hiface_pcm_init()
573 	rt->stream_state = STREAM_DISABLED;  in hiface_pcm_init()
575 		rt->extra_freq = 1;  in hiface_pcm_init()
577 	init_waitqueue_head(&rt->stream_wait_queue);  in hiface_pcm_init()
578 	mutex_init(&rt->stream_mutex);  in hiface_pcm_init()
579 	spin_lock_init(&rt->playback.lock);  in hiface_pcm_init()
582 		ret = hiface_pcm_init_urb(&rt->out_urbs[i], chip, OUT_EP,  in hiface_pcm_init()
588 	ret = snd_pcm_new(chip->card, "USB-SPDIF Audio", 0, 1, 0, &pcm);  in hiface_pcm_init()
590 		dev_err(&chip->dev->dev, "Cannot create pcm instance\n");  in hiface_pcm_init()
594 	pcm->private_data = rt;  in hiface_pcm_init()
595 	pcm->private_free = hiface_pcm_free;  in hiface_pcm_init()
597 	strscpy(pcm->name, "USB-SPDIF Audio", sizeof(pcm->name));  in hiface_pcm_init()
602 	rt->instance = pcm;  in hiface_pcm_init()
604 	chip->pcm = rt;  in hiface_pcm_init()
609 		kfree(rt->out_urbs[i].buffer);  in hiface_pcm_init()