1 // SPDX-License-Identifier: GPL-2.0-or-later
4 * Copyright (c) 2002-2004 by Karsten Wiese
8 * (Tentative) USB Audio Driver for ALSA
12 * Copyright (c) 2002 by Takashi Iwai <tiwai@suse.de>
14 * Many codes borrowed from audio.c by
15 * Alan Cox (alan@lxorguk.ukuu.org.uk)
16 * Thomas Sailer (sailer@ife.ee.ethz.ch)
20 #include <linux/interrupt.h>
21 #include <linux/slab.h>
22 #include <linux/usb.h>
23 #include <linux/moduleparam.h>
24 #include <sound/core.h>
25 #include <sound/info.h>
26 #include <sound/pcm.h>
27 #include <sound/pcm_params.h>
31 #define USX2Y_NRPACKS 4 /* Default value used for nr of packs per urb.
32 1 to 4 have been tested ok on uhci.
33 To use 3 on ohci, you'd need a patch:
34 look for "0000425-linux-2.6.9-rc4-mm1_ohci-hcd.patch.gz" on
35 "https://bugtrack.alsa-project.org/alsa-bug/bug_view_page.php?bug_id=0000425"
37 1, 2 and 4 work out of the box on ohci, if I recall correctly.
38 Bigger is safer operation,
39 smaller gives lower latencies.
41 #define USX2Y_NRPACKS_VARIABLE y /* If your system works ok with this module's parameter
42 nrpacks set to 1, you might as well comment
43 this #define out, and thereby produce smaller, faster code.
44 You'd also set USX2Y_NRPACKS to 1 then.
47 #ifdef USX2Y_NRPACKS_VARIABLE
48 static int nrpacks = USX2Y_NRPACKS; /* number of packets per urb */
49 #define nr_of_packs() nrpacks
50 module_param(nrpacks, int, 0444);
51 MODULE_PARM_DESC(nrpacks, "Number of packets per URB.");
53 #define nr_of_packs() USX2Y_NRPACKS
57 static int usX2Y_urb_capt_retire(struct snd_usX2Y_substream *subs)
59 struct urb *urb = subs->completed_urb;
60 struct snd_pcm_runtime *runtime = subs->pcm_substream->runtime;
62 int i, len, lens = 0, hwptr_done = subs->hwptr_done;
63 struct usX2Ydev *usX2Y = subs->usX2Y;
65 for (i = 0; i < nr_of_packs(); i++) {
66 cp = (unsigned char*)urb->transfer_buffer + urb->iso_frame_desc[i].offset;
67 if (urb->iso_frame_desc[i].status) { /* active? hmm, skip this */
68 snd_printk(KERN_ERR "active frame status %i. "
69 "Most probably some hardware problem.\n",
70 urb->iso_frame_desc[i].status);
71 return urb->iso_frame_desc[i].status;
73 len = urb->iso_frame_desc[i].actual_length / usX2Y->stride;
75 snd_printd("0 == len ERROR!\n");
79 /* copy a data chunk */
80 if ((hwptr_done + len) > runtime->buffer_size) {
81 int cnt = runtime->buffer_size - hwptr_done;
82 int blen = cnt * usX2Y->stride;
83 memcpy(runtime->dma_area + hwptr_done * usX2Y->stride, cp, blen);
84 memcpy(runtime->dma_area, cp + blen, len * usX2Y->stride - blen);
86 memcpy(runtime->dma_area + hwptr_done * usX2Y->stride, cp,
90 if ((hwptr_done += len) >= runtime->buffer_size)
91 hwptr_done -= runtime->buffer_size;
94 subs->hwptr_done = hwptr_done;
95 subs->transfer_done += lens;
96 /* update the pointer, call callback if necessary */
97 if (subs->transfer_done >= runtime->period_size) {
98 subs->transfer_done -= runtime->period_size;
99 snd_pcm_period_elapsed(subs->pcm_substream);
104 * prepare urb for playback data pipe
106 * we copy the data directly from the pcm buffer.
107 * the current position to be copied is held in hwptr field.
108 * since a urb can handle only a single linear buffer, if the total
109 * transferred area overflows the buffer boundary, we cannot send
110 * it directly from the buffer. thus the data is once copied to
111 * a temporary buffer and urb points to that.
113 static int usX2Y_urb_play_prepare(struct snd_usX2Y_substream *subs,
117 int count, counts, pack;
118 struct usX2Ydev *usX2Y = subs->usX2Y;
119 struct snd_pcm_runtime *runtime = subs->pcm_substream->runtime;
122 for (pack = 0; pack < nr_of_packs(); pack++) {
123 /* calculate the size of a packet */
124 counts = cap_urb->iso_frame_desc[pack].actual_length / usX2Y->stride;
126 if (counts < 43 || counts > 50) {
127 snd_printk(KERN_ERR "should not be here with counts=%i\n", counts);
130 /* set up descriptor */
131 urb->iso_frame_desc[pack].offset = pack ?
132 urb->iso_frame_desc[pack - 1].offset +
133 urb->iso_frame_desc[pack - 1].length :
135 urb->iso_frame_desc[pack].length = cap_urb->iso_frame_desc[pack].actual_length;
137 if (atomic_read(&subs->state) >= state_PRERUNNING)
138 if (subs->hwptr + count > runtime->buffer_size) {
139 /* err, the transferred area goes over buffer boundary.
140 * copy the data to the temp buffer.
143 len = runtime->buffer_size - subs->hwptr;
144 urb->transfer_buffer = subs->tmpbuf;
145 memcpy(subs->tmpbuf, runtime->dma_area +
146 subs->hwptr * usX2Y->stride, len * usX2Y->stride);
147 memcpy(subs->tmpbuf + len * usX2Y->stride,
148 runtime->dma_area, (count - len) * usX2Y->stride);
149 subs->hwptr += count;
150 subs->hwptr -= runtime->buffer_size;
152 /* set the buffer pointer */
153 urb->transfer_buffer = runtime->dma_area + subs->hwptr * usX2Y->stride;
154 if ((subs->hwptr += count) >= runtime->buffer_size)
155 subs->hwptr -= runtime->buffer_size;
158 urb->transfer_buffer = subs->tmpbuf;
159 urb->transfer_buffer_length = count * usX2Y->stride;
164 * process after playback data complete
166 * update the current position and call callback if a period is processed.
168 static void usX2Y_urb_play_retire(struct snd_usX2Y_substream *subs, struct urb *urb)
170 struct snd_pcm_runtime *runtime = subs->pcm_substream->runtime;
171 int len = urb->actual_length / subs->usX2Y->stride;
173 subs->transfer_done += len;
174 subs->hwptr_done += len;
175 if (subs->hwptr_done >= runtime->buffer_size)
176 subs->hwptr_done -= runtime->buffer_size;
177 if (subs->transfer_done >= runtime->period_size) {
178 subs->transfer_done -= runtime->period_size;
179 snd_pcm_period_elapsed(subs->pcm_substream);
183 static int usX2Y_urb_submit(struct snd_usX2Y_substream *subs, struct urb *urb, int frame)
188 urb->start_frame = (frame + NRURBS * nr_of_packs()); // let hcd do rollover sanity checks
190 urb->dev = subs->usX2Y->dev; /* we need to set this at each time */
191 if ((err = usb_submit_urb(urb, GFP_ATOMIC)) < 0) {
192 snd_printk(KERN_ERR "usb_submit_urb() returned %i\n", err);
198 static inline int usX2Y_usbframe_complete(struct snd_usX2Y_substream *capsubs,
199 struct snd_usX2Y_substream *playbacksubs,
203 struct urb *urb = playbacksubs->completed_urb;
205 state = atomic_read(&playbacksubs->state);
207 if (state == state_RUNNING)
208 usX2Y_urb_play_retire(playbacksubs, urb);
209 else if (state >= state_PRERUNNING)
210 atomic_inc(&playbacksubs->state);
213 case state_STARTING1:
214 urb = playbacksubs->urb[0];
215 atomic_inc(&playbacksubs->state);
217 case state_STARTING2:
218 urb = playbacksubs->urb[1];
219 atomic_inc(&playbacksubs->state);
224 if ((err = usX2Y_urb_play_prepare(playbacksubs, capsubs->completed_urb, urb)) ||
225 (err = usX2Y_urb_submit(playbacksubs, urb, frame))) {
230 playbacksubs->completed_urb = NULL;
232 state = atomic_read(&capsubs->state);
233 if (state >= state_PREPARED) {
234 if (state == state_RUNNING) {
235 if ((err = usX2Y_urb_capt_retire(capsubs)))
237 } else if (state >= state_PRERUNNING)
238 atomic_inc(&capsubs->state);
239 if ((err = usX2Y_urb_submit(capsubs, capsubs->completed_urb, frame)))
242 capsubs->completed_urb = NULL;
247 static void usX2Y_clients_stop(struct usX2Ydev *usX2Y)
251 for (s = 0; s < 4; s++) {
252 struct snd_usX2Y_substream *subs = usX2Y->subs[s];
254 snd_printdd("%i %p state=%i\n", s, subs, atomic_read(&subs->state));
255 atomic_set(&subs->state, state_STOPPED);
258 for (s = 0; s < 4; s++) {
259 struct snd_usX2Y_substream *subs = usX2Y->subs[s];
261 if (atomic_read(&subs->state) >= state_PRERUNNING)
262 snd_pcm_stop_xrun(subs->pcm_substream);
263 for (u = 0; u < NRURBS; u++) {
264 struct urb *urb = subs->urb[u];
266 snd_printdd("%i status=%i start_frame=%i\n",
267 u, urb->status, urb->start_frame);
271 usX2Y->prepare_subs = NULL;
272 wake_up(&usX2Y->prepare_wait_queue);
275 static void usX2Y_error_urb_status(struct usX2Ydev *usX2Y,
276 struct snd_usX2Y_substream *subs, struct urb *urb)
278 snd_printk(KERN_ERR "ep=%i stalled with status=%i\n", subs->endpoint, urb->status);
280 usX2Y_clients_stop(usX2Y);
283 static void i_usX2Y_urb_complete(struct urb *urb)
285 struct snd_usX2Y_substream *subs = urb->context;
286 struct usX2Ydev *usX2Y = subs->usX2Y;
288 if (unlikely(atomic_read(&subs->state) < state_PREPARED)) {
289 snd_printdd("hcd_frame=%i ep=%i%s status=%i start_frame=%i\n",
290 usb_get_current_frame_number(usX2Y->dev),
291 subs->endpoint, usb_pipein(urb->pipe) ? "in" : "out",
292 urb->status, urb->start_frame);
295 if (unlikely(urb->status)) {
296 usX2Y_error_urb_status(usX2Y, subs, urb);
300 subs->completed_urb = urb;
303 struct snd_usX2Y_substream *capsubs = usX2Y->subs[SNDRV_PCM_STREAM_CAPTURE],
304 *playbacksubs = usX2Y->subs[SNDRV_PCM_STREAM_PLAYBACK];
305 if (capsubs->completed_urb &&
306 atomic_read(&capsubs->state) >= state_PREPARED &&
307 (playbacksubs->completed_urb ||
308 atomic_read(&playbacksubs->state) < state_PREPARED)) {
309 if (!usX2Y_usbframe_complete(capsubs, playbacksubs, urb->start_frame))
310 usX2Y->wait_iso_frame += nr_of_packs();
313 usX2Y_clients_stop(usX2Y);
319 static void usX2Y_urbs_set_complete(struct usX2Ydev * usX2Y,
320 void (*complete)(struct urb *))
323 for (s = 0; s < 4; s++) {
324 struct snd_usX2Y_substream *subs = usX2Y->subs[s];
326 for (u = 0; u < NRURBS; u++) {
327 struct urb * urb = subs->urb[u];
329 urb->complete = complete;
334 static void usX2Y_subs_startup_finish(struct usX2Ydev * usX2Y)
336 usX2Y_urbs_set_complete(usX2Y, i_usX2Y_urb_complete);
337 usX2Y->prepare_subs = NULL;
340 static void i_usX2Y_subs_startup(struct urb *urb)
342 struct snd_usX2Y_substream *subs = urb->context;
343 struct usX2Ydev *usX2Y = subs->usX2Y;
344 struct snd_usX2Y_substream *prepare_subs = usX2Y->prepare_subs;
345 if (NULL != prepare_subs)
346 if (urb->start_frame == prepare_subs->urb[0]->start_frame) {
347 usX2Y_subs_startup_finish(usX2Y);
348 atomic_inc(&prepare_subs->state);
349 wake_up(&usX2Y->prepare_wait_queue);
352 i_usX2Y_urb_complete(urb);
355 static void usX2Y_subs_prepare(struct snd_usX2Y_substream *subs)
357 snd_printdd("usX2Y_substream_prepare(%p) ep=%i urb0=%p urb1=%p\n",
358 subs, subs->endpoint, subs->urb[0], subs->urb[1]);
359 /* reset the pointer */
361 subs->hwptr_done = 0;
362 subs->transfer_done = 0;
366 static void usX2Y_urb_release(struct urb **urb, int free_tb)
371 kfree((*urb)->transfer_buffer);
377 * release a substreams urbs
379 static void usX2Y_urbs_release(struct snd_usX2Y_substream *subs)
382 snd_printdd("usX2Y_urbs_release() %i\n", subs->endpoint);
383 for (i = 0; i < NRURBS; i++)
384 usX2Y_urb_release(subs->urb + i,
385 subs != subs->usX2Y->subs[SNDRV_PCM_STREAM_PLAYBACK]);
391 * initialize a substream's urbs
393 static int usX2Y_urbs_allocate(struct snd_usX2Y_substream *subs)
397 int is_playback = subs == subs->usX2Y->subs[SNDRV_PCM_STREAM_PLAYBACK];
398 struct usb_device *dev = subs->usX2Y->dev;
400 pipe = is_playback ? usb_sndisocpipe(dev, subs->endpoint) :
401 usb_rcvisocpipe(dev, subs->endpoint);
402 subs->maxpacksize = usb_maxpacket(dev, pipe, is_playback);
403 if (!subs->maxpacksize)
406 if (is_playback && NULL == subs->tmpbuf) { /* allocate a temporary buffer for playback */
407 subs->tmpbuf = kcalloc(nr_of_packs(), subs->maxpacksize, GFP_KERNEL);
411 /* allocate and initialize data urbs */
412 for (i = 0; i < NRURBS; i++) {
413 struct urb **purb = subs->urb + i;
418 *purb = usb_alloc_urb(nr_of_packs(), GFP_KERNEL);
420 usX2Y_urbs_release(subs);
423 if (!is_playback && !(*purb)->transfer_buffer) {
424 /* allocate a capture buffer per urb */
425 (*purb)->transfer_buffer =
426 kmalloc_array(subs->maxpacksize,
427 nr_of_packs(), GFP_KERNEL);
428 if (NULL == (*purb)->transfer_buffer) {
429 usX2Y_urbs_release(subs);
434 (*purb)->pipe = pipe;
435 (*purb)->number_of_packets = nr_of_packs();
436 (*purb)->context = subs;
437 (*purb)->interval = 1;
438 (*purb)->complete = i_usX2Y_subs_startup;
443 static void usX2Y_subs_startup(struct snd_usX2Y_substream *subs)
445 struct usX2Ydev *usX2Y = subs->usX2Y;
446 usX2Y->prepare_subs = subs;
447 subs->urb[0]->start_frame = -1;
449 usX2Y_urbs_set_complete(usX2Y, i_usX2Y_subs_startup);
452 static int usX2Y_urbs_start(struct snd_usX2Y_substream *subs)
455 struct usX2Ydev *usX2Y = subs->usX2Y;
457 if ((err = usX2Y_urbs_allocate(subs)) < 0)
459 subs->completed_urb = NULL;
460 for (i = 0; i < 4; i++) {
461 struct snd_usX2Y_substream *subs = usX2Y->subs[i];
462 if (subs != NULL && atomic_read(&subs->state) >= state_PREPARED)
467 usX2Y_subs_startup(subs);
468 for (i = 0; i < NRURBS; i++) {
469 struct urb *urb = subs->urb[i];
470 if (usb_pipein(urb->pipe)) {
473 atomic_set(&subs->state, state_STARTING3);
474 urb->dev = usX2Y->dev;
475 for (pack = 0; pack < nr_of_packs(); pack++) {
476 urb->iso_frame_desc[pack].offset = subs->maxpacksize * pack;
477 urb->iso_frame_desc[pack].length = subs->maxpacksize;
479 urb->transfer_buffer_length = subs->maxpacksize * nr_of_packs();
480 if ((err = usb_submit_urb(urb, GFP_ATOMIC)) < 0) {
481 snd_printk (KERN_ERR "cannot submit datapipe for urb %d, err = %d\n", i, err);
486 usX2Y->wait_iso_frame = urb->start_frame;
487 urb->transfer_flags = 0;
489 atomic_set(&subs->state, state_STARTING1);
494 wait_event(usX2Y->prepare_wait_queue, NULL == usX2Y->prepare_subs);
495 if (atomic_read(&subs->state) != state_PREPARED)
500 usX2Y_subs_startup_finish(usX2Y);
501 usX2Y_clients_stop(usX2Y); // something is completely wroong > stop evrything
507 * return the current pcm pointer. just return the hwptr_done value.
509 static snd_pcm_uframes_t snd_usX2Y_pcm_pointer(struct snd_pcm_substream *substream)
511 struct snd_usX2Y_substream *subs = substream->runtime->private_data;
512 return subs->hwptr_done;
515 * start/stop substream
517 static int snd_usX2Y_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
519 struct snd_usX2Y_substream *subs = substream->runtime->private_data;
522 case SNDRV_PCM_TRIGGER_START:
523 snd_printdd("snd_usX2Y_pcm_trigger(START)\n");
524 if (atomic_read(&subs->state) == state_PREPARED &&
525 atomic_read(&subs->usX2Y->subs[SNDRV_PCM_STREAM_CAPTURE]->state) >= state_PREPARED) {
526 atomic_set(&subs->state, state_PRERUNNING);
532 case SNDRV_PCM_TRIGGER_STOP:
533 snd_printdd("snd_usX2Y_pcm_trigger(STOP)\n");
534 if (atomic_read(&subs->state) >= state_PRERUNNING)
535 atomic_set(&subs->state, state_PREPARED);
545 * allocate a buffer, setup samplerate
547 * so far we use a physically linear buffer although packetize transfer
548 * doesn't need a continuous area.
549 * if sg buffer is supported on the later version of alsa, we'll follow
552 static const struct s_c2
558 { 0x14, 0x08}, // this line sets 44100, well actually a little less
559 { 0x18, 0x40}, // only tascam / frontier design knows the further lines .......
592 static const struct s_c2 SetRate48000[] =
594 { 0x14, 0x09}, // this line sets 48000, well actually a little less
595 { 0x18, 0x40}, // only tascam / frontier design knows the further lines .......
628 #define NOOF_SETRATE_URBS ARRAY_SIZE(SetRate48000)
630 static void i_usX2Y_04Int(struct urb *urb)
632 struct usX2Ydev *usX2Y = urb->context;
635 snd_printk(KERN_ERR "snd_usX2Y_04Int() urb->status=%i\n", urb->status);
636 if (0 == --usX2Y->US04->len)
637 wake_up(&usX2Y->In04WaitQueue);
640 static int usX2Y_rate_set(struct usX2Ydev *usX2Y, int rate)
643 struct snd_usX2Y_urbSeq *us = NULL;
645 const struct s_c2 *ra = rate == 48000 ? SetRate48000 : SetRate44100;
647 if (usX2Y->rate != rate) {
648 us = kzalloc(sizeof(*us) + sizeof(struct urb*) * NOOF_SETRATE_URBS, GFP_KERNEL);
653 usbdata = kmalloc_array(NOOF_SETRATE_URBS, sizeof(int),
655 if (NULL == usbdata) {
659 for (i = 0; i < NOOF_SETRATE_URBS; ++i) {
660 if (NULL == (us->urb[i] = usb_alloc_urb(0, GFP_KERNEL))) {
664 ((char*)(usbdata + i))[0] = ra[i].c1;
665 ((char*)(usbdata + i))[1] = ra[i].c2;
666 usb_fill_bulk_urb(us->urb[i], usX2Y->dev, usb_sndbulkpipe(usX2Y->dev, 4),
667 usbdata + i, 2, i_usX2Y_04Int, usX2Y);
669 err = usb_urb_ep_type_check(us->urb[0]);
673 us->len = NOOF_SETRATE_URBS;
675 wait_event_timeout(usX2Y->In04WaitQueue, 0 == us->len, HZ);
681 us->submitted = 2*NOOF_SETRATE_URBS;
682 for (i = 0; i < NOOF_SETRATE_URBS; ++i) {
683 struct urb *urb = us->urb[i];
705 static int usX2Y_format_set(struct usX2Ydev *usX2Y, snd_pcm_format_t format)
709 if (format == SNDRV_PCM_FORMAT_S24_3LE) {
716 list_for_each(p, &usX2Y->midi_list) {
717 snd_usbmidi_input_stop(p);
719 usb_kill_urb(usX2Y->In04urb);
720 if ((err = usb_set_interface(usX2Y->dev, 0, alternate))) {
721 snd_printk(KERN_ERR "usb_set_interface error \n");
724 usX2Y->In04urb->dev = usX2Y->dev;
725 err = usb_submit_urb(usX2Y->In04urb, GFP_KERNEL);
726 list_for_each(p, &usX2Y->midi_list) {
727 snd_usbmidi_input_start(p);
729 usX2Y->format = format;
735 static int snd_usX2Y_pcm_hw_params(struct snd_pcm_substream *substream,
736 struct snd_pcm_hw_params *hw_params)
739 unsigned int rate = params_rate(hw_params);
740 snd_pcm_format_t format = params_format(hw_params);
741 struct snd_card *card = substream->pstr->pcm->card;
742 struct usX2Ydev *dev = usX2Y(card);
745 mutex_lock(&usX2Y(card)->pcm_mutex);
746 snd_printdd("snd_usX2Y_hw_params(%p, %p)\n", substream, hw_params);
747 /* all pcm substreams off one usX2Y have to operate at the same
750 for (i = 0; i < dev->pcm_devs * 2; i++) {
751 struct snd_usX2Y_substream *subs = dev->subs[i];
752 struct snd_pcm_substream *test_substream;
756 test_substream = subs->pcm_substream;
757 if (!test_substream || test_substream == substream ||
758 !test_substream->runtime)
760 if ((test_substream->runtime->format &&
761 test_substream->runtime->format != format) ||
762 (test_substream->runtime->rate &&
763 test_substream->runtime->rate != rate)) {
770 mutex_unlock(&usX2Y(card)->pcm_mutex);
777 static int snd_usX2Y_pcm_hw_free(struct snd_pcm_substream *substream)
779 struct snd_pcm_runtime *runtime = substream->runtime;
780 struct snd_usX2Y_substream *subs = runtime->private_data;
781 mutex_lock(&subs->usX2Y->pcm_mutex);
782 snd_printdd("snd_usX2Y_hw_free(%p)\n", substream);
784 if (SNDRV_PCM_STREAM_PLAYBACK == substream->stream) {
785 struct snd_usX2Y_substream *cap_subs = subs->usX2Y->subs[SNDRV_PCM_STREAM_CAPTURE];
786 atomic_set(&subs->state, state_STOPPED);
787 usX2Y_urbs_release(subs);
788 if (!cap_subs->pcm_substream ||
789 !cap_subs->pcm_substream->runtime ||
790 !cap_subs->pcm_substream->runtime->status ||
791 cap_subs->pcm_substream->runtime->status->state < SNDRV_PCM_STATE_PREPARED) {
792 atomic_set(&cap_subs->state, state_STOPPED);
793 usX2Y_urbs_release(cap_subs);
796 struct snd_usX2Y_substream *playback_subs = subs->usX2Y->subs[SNDRV_PCM_STREAM_PLAYBACK];
797 if (atomic_read(&playback_subs->state) < state_PREPARED) {
798 atomic_set(&subs->state, state_STOPPED);
799 usX2Y_urbs_release(subs);
802 mutex_unlock(&subs->usX2Y->pcm_mutex);
808 * set format and initialize urbs
810 static int snd_usX2Y_pcm_prepare(struct snd_pcm_substream *substream)
812 struct snd_pcm_runtime *runtime = substream->runtime;
813 struct snd_usX2Y_substream *subs = runtime->private_data;
814 struct usX2Ydev *usX2Y = subs->usX2Y;
815 struct snd_usX2Y_substream *capsubs = subs->usX2Y->subs[SNDRV_PCM_STREAM_CAPTURE];
817 snd_printdd("snd_usX2Y_pcm_prepare(%p)\n", substream);
819 mutex_lock(&usX2Y->pcm_mutex);
820 usX2Y_subs_prepare(subs);
821 // Start hardware streams
822 // SyncStream first....
823 if (atomic_read(&capsubs->state) < state_PREPARED) {
824 if (usX2Y->format != runtime->format)
825 if ((err = usX2Y_format_set(usX2Y, runtime->format)) < 0)
826 goto up_prepare_mutex;
827 if (usX2Y->rate != runtime->rate)
828 if ((err = usX2Y_rate_set(usX2Y, runtime->rate)) < 0)
829 goto up_prepare_mutex;
830 snd_printdd("starting capture pipe for %s\n", subs == capsubs ? "self" : "playpipe");
831 if (0 > (err = usX2Y_urbs_start(capsubs)))
832 goto up_prepare_mutex;
835 if (subs != capsubs && atomic_read(&subs->state) < state_PREPARED)
836 err = usX2Y_urbs_start(subs);
839 mutex_unlock(&usX2Y->pcm_mutex);
843 static const struct snd_pcm_hardware snd_usX2Y_2c =
845 .info = (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
846 SNDRV_PCM_INFO_BLOCK_TRANSFER |
847 SNDRV_PCM_INFO_MMAP_VALID |
848 SNDRV_PCM_INFO_BATCH),
849 .formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_3LE,
850 .rates = SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000,
855 .buffer_bytes_max = (2*128*1024),
856 .period_bytes_min = 64,
857 .period_bytes_max = (128*1024),
865 static int snd_usX2Y_pcm_open(struct snd_pcm_substream *substream)
867 struct snd_usX2Y_substream *subs = ((struct snd_usX2Y_substream **)
868 snd_pcm_substream_chip(substream))[substream->stream];
869 struct snd_pcm_runtime *runtime = substream->runtime;
871 if (subs->usX2Y->chip_status & USX2Y_STAT_CHIP_MMAP_PCM_URBS)
874 runtime->hw = snd_usX2Y_2c;
875 runtime->private_data = subs;
876 subs->pcm_substream = substream;
877 snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_TIME, 1000, 200000);
883 static int snd_usX2Y_pcm_close(struct snd_pcm_substream *substream)
885 struct snd_pcm_runtime *runtime = substream->runtime;
886 struct snd_usX2Y_substream *subs = runtime->private_data;
888 subs->pcm_substream = NULL;
894 static const struct snd_pcm_ops snd_usX2Y_pcm_ops =
896 .open = snd_usX2Y_pcm_open,
897 .close = snd_usX2Y_pcm_close,
898 .hw_params = snd_usX2Y_pcm_hw_params,
899 .hw_free = snd_usX2Y_pcm_hw_free,
900 .prepare = snd_usX2Y_pcm_prepare,
901 .trigger = snd_usX2Y_pcm_trigger,
902 .pointer = snd_usX2Y_pcm_pointer,
907 * free a usb stream instance
909 static void usX2Y_audio_stream_free(struct snd_usX2Y_substream **usX2Y_substream)
913 for_each_pcm_streams(stream) {
914 kfree(usX2Y_substream[stream]);
915 usX2Y_substream[stream] = NULL;
919 static void snd_usX2Y_pcm_private_free(struct snd_pcm *pcm)
921 struct snd_usX2Y_substream **usX2Y_stream = pcm->private_data;
923 usX2Y_audio_stream_free(usX2Y_stream);
926 static int usX2Y_audio_stream_new(struct snd_card *card, int playback_endpoint, int capture_endpoint)
930 struct snd_usX2Y_substream **usX2Y_substream =
931 usX2Y(card)->subs + 2 * usX2Y(card)->pcm_devs;
933 for (i = playback_endpoint ? SNDRV_PCM_STREAM_PLAYBACK : SNDRV_PCM_STREAM_CAPTURE;
934 i <= SNDRV_PCM_STREAM_CAPTURE; ++i) {
935 usX2Y_substream[i] = kzalloc(sizeof(struct snd_usX2Y_substream), GFP_KERNEL);
936 if (!usX2Y_substream[i])
939 usX2Y_substream[i]->usX2Y = usX2Y(card);
942 if (playback_endpoint)
943 usX2Y_substream[SNDRV_PCM_STREAM_PLAYBACK]->endpoint = playback_endpoint;
944 usX2Y_substream[SNDRV_PCM_STREAM_CAPTURE]->endpoint = capture_endpoint;
946 err = snd_pcm_new(card, NAME_ALLCAPS" Audio", usX2Y(card)->pcm_devs,
947 playback_endpoint ? 1 : 0, 1,
950 usX2Y_audio_stream_free(usX2Y_substream);
954 if (playback_endpoint)
955 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_usX2Y_pcm_ops);
956 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_usX2Y_pcm_ops);
958 pcm->private_data = usX2Y_substream;
959 pcm->private_free = snd_usX2Y_pcm_private_free;
962 sprintf(pcm->name, NAME_ALLCAPS" Audio #%d", usX2Y(card)->pcm_devs);
964 if (playback_endpoint) {
965 snd_pcm_set_managed_buffer(pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream,
966 SNDRV_DMA_TYPE_CONTINUOUS,
971 snd_pcm_set_managed_buffer(pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream,
972 SNDRV_DMA_TYPE_CONTINUOUS,
975 usX2Y(card)->pcm_devs++;
981 * create a chip instance and set its names.
983 int usX2Y_audio_create(struct snd_card *card)
987 INIT_LIST_HEAD(&usX2Y(card)->pcm_list);
989 if (0 > (err = usX2Y_audio_stream_new(card, 0xA, 0x8)))
991 if (le16_to_cpu(usX2Y(card)->dev->descriptor.idProduct) == USB_ID_US428)
992 if (0 > (err = usX2Y_audio_stream_new(card, 0, 0xA)))
994 if (le16_to_cpu(usX2Y(card)->dev->descriptor.idProduct) != USB_ID_US122)
995 err = usX2Y_rate_set(usX2Y(card), 44100); // Lets us428 recognize output-volume settings, disturbs us122.