3 * Copyright (c) 2002-2004 by Karsten Wiese
7 * (Tentative) USB Audio Driver for ALSA
11 * Copyright (c) 2002 by Takashi Iwai <tiwai@suse.de>
13 * Many codes borrowed from audio.c by
14 * Alan Cox (alan@lxorguk.ukuu.org.uk)
15 * Thomas Sailer (sailer@ife.ee.ethz.ch)
18 * This program is free software; you can redistribute it and/or modify
19 * it under the terms of the GNU General Public License as published by
20 * the Free Software Foundation; either version 2 of the License, or
21 * (at your option) any later version.
23 * This program is distributed in the hope that it will be useful,
24 * but WITHOUT ANY WARRANTY; without even the implied warranty of
25 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
26 * GNU General Public License for more details.
28 * You should have received a copy of the GNU General Public License
29 * along with this program; if not, write to the Free Software
30 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
34 #include <linux/interrupt.h>
35 #include <linux/slab.h>
36 #include <linux/usb.h>
37 #include <linux/moduleparam.h>
38 #include <sound/core.h>
39 #include <sound/info.h>
40 #include <sound/pcm.h>
41 #include <sound/pcm_params.h>
45 #define USX2Y_NRPACKS 4 /* Default value used for nr of packs per urb.
46 1 to 4 have been tested ok on uhci.
47 To use 3 on ohci, you'd need a patch:
48 look for "0000425-linux-2.6.9-rc4-mm1_ohci-hcd.patch.gz" on
49 "https://bugtrack.alsa-project.org/alsa-bug/bug_view_page.php?bug_id=0000425"
51 1, 2 and 4 work out of the box on ohci, if I recall correctly.
52 Bigger is safer operation,
53 smaller gives lower latencies.
55 #define USX2Y_NRPACKS_VARIABLE y /* If your system works ok with this module's parameter
56 nrpacks set to 1, you might as well comment
57 this #define out, and thereby produce smaller, faster code.
58 You'd also set USX2Y_NRPACKS to 1 then.
61 #ifdef USX2Y_NRPACKS_VARIABLE
62 static int nrpacks = USX2Y_NRPACKS; /* number of packets per urb */
63 #define nr_of_packs() nrpacks
64 module_param(nrpacks, int, 0444);
65 MODULE_PARM_DESC(nrpacks, "Number of packets per URB.");
67 #define nr_of_packs() USX2Y_NRPACKS
71 static int usX2Y_urb_capt_retire(struct snd_usX2Y_substream *subs)
73 struct urb *urb = subs->completed_urb;
74 struct snd_pcm_runtime *runtime = subs->pcm_substream->runtime;
76 int i, len, lens = 0, hwptr_done = subs->hwptr_done;
77 struct usX2Ydev *usX2Y = subs->usX2Y;
79 for (i = 0; i < nr_of_packs(); i++) {
80 cp = (unsigned char*)urb->transfer_buffer + urb->iso_frame_desc[i].offset;
81 if (urb->iso_frame_desc[i].status) { /* active? hmm, skip this */
82 snd_printk(KERN_ERR "active frame status %i. "
83 "Most probably some hardware problem.\n",
84 urb->iso_frame_desc[i].status);
85 return urb->iso_frame_desc[i].status;
87 len = urb->iso_frame_desc[i].actual_length / usX2Y->stride;
89 snd_printd("0 == len ERROR!\n");
93 /* copy a data chunk */
94 if ((hwptr_done + len) > runtime->buffer_size) {
95 int cnt = runtime->buffer_size - hwptr_done;
96 int blen = cnt * usX2Y->stride;
97 memcpy(runtime->dma_area + hwptr_done * usX2Y->stride, cp, blen);
98 memcpy(runtime->dma_area, cp + blen, len * usX2Y->stride - blen);
100 memcpy(runtime->dma_area + hwptr_done * usX2Y->stride, cp,
101 len * usX2Y->stride);
104 if ((hwptr_done += len) >= runtime->buffer_size)
105 hwptr_done -= runtime->buffer_size;
108 subs->hwptr_done = hwptr_done;
109 subs->transfer_done += lens;
110 /* update the pointer, call callback if necessary */
111 if (subs->transfer_done >= runtime->period_size) {
112 subs->transfer_done -= runtime->period_size;
113 snd_pcm_period_elapsed(subs->pcm_substream);
118 * prepare urb for playback data pipe
120 * we copy the data directly from the pcm buffer.
121 * the current position to be copied is held in hwptr field.
122 * since a urb can handle only a single linear buffer, if the total
123 * transferred area overflows the buffer boundary, we cannot send
124 * it directly from the buffer. thus the data is once copied to
125 * a temporary buffer and urb points to that.
127 static int usX2Y_urb_play_prepare(struct snd_usX2Y_substream *subs,
131 int count, counts, pack;
132 struct usX2Ydev *usX2Y = subs->usX2Y;
133 struct snd_pcm_runtime *runtime = subs->pcm_substream->runtime;
136 for (pack = 0; pack < nr_of_packs(); pack++) {
137 /* calculate the size of a packet */
138 counts = cap_urb->iso_frame_desc[pack].actual_length / usX2Y->stride;
140 if (counts < 43 || counts > 50) {
141 snd_printk(KERN_ERR "should not be here with counts=%i\n", counts);
144 /* set up descriptor */
145 urb->iso_frame_desc[pack].offset = pack ?
146 urb->iso_frame_desc[pack - 1].offset +
147 urb->iso_frame_desc[pack - 1].length :
149 urb->iso_frame_desc[pack].length = cap_urb->iso_frame_desc[pack].actual_length;
151 if (atomic_read(&subs->state) >= state_PRERUNNING)
152 if (subs->hwptr + count > runtime->buffer_size) {
153 /* err, the transferred area goes over buffer boundary.
154 * copy the data to the temp buffer.
157 len = runtime->buffer_size - subs->hwptr;
158 urb->transfer_buffer = subs->tmpbuf;
159 memcpy(subs->tmpbuf, runtime->dma_area +
160 subs->hwptr * usX2Y->stride, len * usX2Y->stride);
161 memcpy(subs->tmpbuf + len * usX2Y->stride,
162 runtime->dma_area, (count - len) * usX2Y->stride);
163 subs->hwptr += count;
164 subs->hwptr -= runtime->buffer_size;
166 /* set the buffer pointer */
167 urb->transfer_buffer = runtime->dma_area + subs->hwptr * usX2Y->stride;
168 if ((subs->hwptr += count) >= runtime->buffer_size)
169 subs->hwptr -= runtime->buffer_size;
172 urb->transfer_buffer = subs->tmpbuf;
173 urb->transfer_buffer_length = count * usX2Y->stride;
178 * process after playback data complete
180 * update the current position and call callback if a period is processed.
182 static void usX2Y_urb_play_retire(struct snd_usX2Y_substream *subs, struct urb *urb)
184 struct snd_pcm_runtime *runtime = subs->pcm_substream->runtime;
185 int len = urb->actual_length / subs->usX2Y->stride;
187 subs->transfer_done += len;
188 subs->hwptr_done += len;
189 if (subs->hwptr_done >= runtime->buffer_size)
190 subs->hwptr_done -= runtime->buffer_size;
191 if (subs->transfer_done >= runtime->period_size) {
192 subs->transfer_done -= runtime->period_size;
193 snd_pcm_period_elapsed(subs->pcm_substream);
197 static int usX2Y_urb_submit(struct snd_usX2Y_substream *subs, struct urb *urb, int frame)
202 urb->start_frame = (frame + NRURBS * nr_of_packs()); // let hcd do rollover sanity checks
204 urb->dev = subs->usX2Y->dev; /* we need to set this at each time */
205 if ((err = usb_submit_urb(urb, GFP_ATOMIC)) < 0) {
206 snd_printk(KERN_ERR "usb_submit_urb() returned %i\n", err);
212 static inline int usX2Y_usbframe_complete(struct snd_usX2Y_substream *capsubs,
213 struct snd_usX2Y_substream *playbacksubs,
217 struct urb *urb = playbacksubs->completed_urb;
219 state = atomic_read(&playbacksubs->state);
221 if (state == state_RUNNING)
222 usX2Y_urb_play_retire(playbacksubs, urb);
223 else if (state >= state_PRERUNNING)
224 atomic_inc(&playbacksubs->state);
227 case state_STARTING1:
228 urb = playbacksubs->urb[0];
229 atomic_inc(&playbacksubs->state);
231 case state_STARTING2:
232 urb = playbacksubs->urb[1];
233 atomic_inc(&playbacksubs->state);
238 if ((err = usX2Y_urb_play_prepare(playbacksubs, capsubs->completed_urb, urb)) ||
239 (err = usX2Y_urb_submit(playbacksubs, urb, frame))) {
244 playbacksubs->completed_urb = NULL;
246 state = atomic_read(&capsubs->state);
247 if (state >= state_PREPARED) {
248 if (state == state_RUNNING) {
249 if ((err = usX2Y_urb_capt_retire(capsubs)))
251 } else if (state >= state_PRERUNNING)
252 atomic_inc(&capsubs->state);
253 if ((err = usX2Y_urb_submit(capsubs, capsubs->completed_urb, frame)))
256 capsubs->completed_urb = NULL;
261 static void usX2Y_clients_stop(struct usX2Ydev *usX2Y)
265 for (s = 0; s < 4; s++) {
266 struct snd_usX2Y_substream *subs = usX2Y->subs[s];
268 snd_printdd("%i %p state=%i\n", s, subs, atomic_read(&subs->state));
269 atomic_set(&subs->state, state_STOPPED);
272 for (s = 0; s < 4; s++) {
273 struct snd_usX2Y_substream *subs = usX2Y->subs[s];
275 if (atomic_read(&subs->state) >= state_PRERUNNING)
276 snd_pcm_stop_xrun(subs->pcm_substream);
277 for (u = 0; u < NRURBS; u++) {
278 struct urb *urb = subs->urb[u];
280 snd_printdd("%i status=%i start_frame=%i\n",
281 u, urb->status, urb->start_frame);
285 usX2Y->prepare_subs = NULL;
286 wake_up(&usX2Y->prepare_wait_queue);
289 static void usX2Y_error_urb_status(struct usX2Ydev *usX2Y,
290 struct snd_usX2Y_substream *subs, struct urb *urb)
292 snd_printk(KERN_ERR "ep=%i stalled with status=%i\n", subs->endpoint, urb->status);
294 usX2Y_clients_stop(usX2Y);
297 static void i_usX2Y_urb_complete(struct urb *urb)
299 struct snd_usX2Y_substream *subs = urb->context;
300 struct usX2Ydev *usX2Y = subs->usX2Y;
302 if (unlikely(atomic_read(&subs->state) < state_PREPARED)) {
303 snd_printdd("hcd_frame=%i ep=%i%s status=%i start_frame=%i\n",
304 usb_get_current_frame_number(usX2Y->dev),
305 subs->endpoint, usb_pipein(urb->pipe) ? "in" : "out",
306 urb->status, urb->start_frame);
309 if (unlikely(urb->status)) {
310 usX2Y_error_urb_status(usX2Y, subs, urb);
314 subs->completed_urb = urb;
317 struct snd_usX2Y_substream *capsubs = usX2Y->subs[SNDRV_PCM_STREAM_CAPTURE],
318 *playbacksubs = usX2Y->subs[SNDRV_PCM_STREAM_PLAYBACK];
319 if (capsubs->completed_urb &&
320 atomic_read(&capsubs->state) >= state_PREPARED &&
321 (playbacksubs->completed_urb ||
322 atomic_read(&playbacksubs->state) < state_PREPARED)) {
323 if (!usX2Y_usbframe_complete(capsubs, playbacksubs, urb->start_frame))
324 usX2Y->wait_iso_frame += nr_of_packs();
327 usX2Y_clients_stop(usX2Y);
333 static void usX2Y_urbs_set_complete(struct usX2Ydev * usX2Y,
334 void (*complete)(struct urb *))
337 for (s = 0; s < 4; s++) {
338 struct snd_usX2Y_substream *subs = usX2Y->subs[s];
340 for (u = 0; u < NRURBS; u++) {
341 struct urb * urb = subs->urb[u];
343 urb->complete = complete;
348 static void usX2Y_subs_startup_finish(struct usX2Ydev * usX2Y)
350 usX2Y_urbs_set_complete(usX2Y, i_usX2Y_urb_complete);
351 usX2Y->prepare_subs = NULL;
354 static void i_usX2Y_subs_startup(struct urb *urb)
356 struct snd_usX2Y_substream *subs = urb->context;
357 struct usX2Ydev *usX2Y = subs->usX2Y;
358 struct snd_usX2Y_substream *prepare_subs = usX2Y->prepare_subs;
359 if (NULL != prepare_subs)
360 if (urb->start_frame == prepare_subs->urb[0]->start_frame) {
361 usX2Y_subs_startup_finish(usX2Y);
362 atomic_inc(&prepare_subs->state);
363 wake_up(&usX2Y->prepare_wait_queue);
366 i_usX2Y_urb_complete(urb);
369 static void usX2Y_subs_prepare(struct snd_usX2Y_substream *subs)
371 snd_printdd("usX2Y_substream_prepare(%p) ep=%i urb0=%p urb1=%p\n",
372 subs, subs->endpoint, subs->urb[0], subs->urb[1]);
373 /* reset the pointer */
375 subs->hwptr_done = 0;
376 subs->transfer_done = 0;
380 static void usX2Y_urb_release(struct urb **urb, int free_tb)
385 kfree((*urb)->transfer_buffer);
391 * release a substreams urbs
393 static void usX2Y_urbs_release(struct snd_usX2Y_substream *subs)
396 snd_printdd("usX2Y_urbs_release() %i\n", subs->endpoint);
397 for (i = 0; i < NRURBS; i++)
398 usX2Y_urb_release(subs->urb + i,
399 subs != subs->usX2Y->subs[SNDRV_PCM_STREAM_PLAYBACK]);
405 * initialize a substream's urbs
407 static int usX2Y_urbs_allocate(struct snd_usX2Y_substream *subs)
411 int is_playback = subs == subs->usX2Y->subs[SNDRV_PCM_STREAM_PLAYBACK];
412 struct usb_device *dev = subs->usX2Y->dev;
414 pipe = is_playback ? usb_sndisocpipe(dev, subs->endpoint) :
415 usb_rcvisocpipe(dev, subs->endpoint);
416 subs->maxpacksize = usb_maxpacket(dev, pipe, is_playback);
417 if (!subs->maxpacksize)
420 if (is_playback && NULL == subs->tmpbuf) { /* allocate a temporary buffer for playback */
421 subs->tmpbuf = kcalloc(nr_of_packs(), subs->maxpacksize, GFP_KERNEL);
422 if (NULL == subs->tmpbuf) {
423 snd_printk(KERN_ERR "cannot malloc tmpbuf\n");
427 /* allocate and initialize data urbs */
428 for (i = 0; i < NRURBS; i++) {
429 struct urb **purb = subs->urb + i;
434 *purb = usb_alloc_urb(nr_of_packs(), GFP_KERNEL);
436 usX2Y_urbs_release(subs);
439 if (!is_playback && !(*purb)->transfer_buffer) {
440 /* allocate a capture buffer per urb */
441 (*purb)->transfer_buffer = kmalloc(subs->maxpacksize * nr_of_packs(), GFP_KERNEL);
442 if (NULL == (*purb)->transfer_buffer) {
443 usX2Y_urbs_release(subs);
448 (*purb)->pipe = pipe;
449 (*purb)->number_of_packets = nr_of_packs();
450 (*purb)->context = subs;
451 (*purb)->interval = 1;
452 (*purb)->complete = i_usX2Y_subs_startup;
457 static void usX2Y_subs_startup(struct snd_usX2Y_substream *subs)
459 struct usX2Ydev *usX2Y = subs->usX2Y;
460 usX2Y->prepare_subs = subs;
461 subs->urb[0]->start_frame = -1;
463 usX2Y_urbs_set_complete(usX2Y, i_usX2Y_subs_startup);
466 static int usX2Y_urbs_start(struct snd_usX2Y_substream *subs)
469 struct usX2Ydev *usX2Y = subs->usX2Y;
471 if ((err = usX2Y_urbs_allocate(subs)) < 0)
473 subs->completed_urb = NULL;
474 for (i = 0; i < 4; i++) {
475 struct snd_usX2Y_substream *subs = usX2Y->subs[i];
476 if (subs != NULL && atomic_read(&subs->state) >= state_PREPARED)
481 usX2Y_subs_startup(subs);
482 for (i = 0; i < NRURBS; i++) {
483 struct urb *urb = subs->urb[i];
484 if (usb_pipein(urb->pipe)) {
487 atomic_set(&subs->state, state_STARTING3);
488 urb->dev = usX2Y->dev;
489 for (pack = 0; pack < nr_of_packs(); pack++) {
490 urb->iso_frame_desc[pack].offset = subs->maxpacksize * pack;
491 urb->iso_frame_desc[pack].length = subs->maxpacksize;
493 urb->transfer_buffer_length = subs->maxpacksize * nr_of_packs();
494 if ((err = usb_submit_urb(urb, GFP_ATOMIC)) < 0) {
495 snd_printk (KERN_ERR "cannot submit datapipe for urb %d, err = %d\n", i, err);
500 usX2Y->wait_iso_frame = urb->start_frame;
501 urb->transfer_flags = 0;
503 atomic_set(&subs->state, state_STARTING1);
508 wait_event(usX2Y->prepare_wait_queue, NULL == usX2Y->prepare_subs);
509 if (atomic_read(&subs->state) != state_PREPARED)
514 usX2Y_subs_startup_finish(usX2Y);
515 usX2Y_clients_stop(usX2Y); // something is completely wroong > stop evrything
521 * return the current pcm pointer. just return the hwptr_done value.
523 static snd_pcm_uframes_t snd_usX2Y_pcm_pointer(struct snd_pcm_substream *substream)
525 struct snd_usX2Y_substream *subs = substream->runtime->private_data;
526 return subs->hwptr_done;
529 * start/stop substream
531 static int snd_usX2Y_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
533 struct snd_usX2Y_substream *subs = substream->runtime->private_data;
536 case SNDRV_PCM_TRIGGER_START:
537 snd_printdd("snd_usX2Y_pcm_trigger(START)\n");
538 if (atomic_read(&subs->state) == state_PREPARED &&
539 atomic_read(&subs->usX2Y->subs[SNDRV_PCM_STREAM_CAPTURE]->state) >= state_PREPARED) {
540 atomic_set(&subs->state, state_PRERUNNING);
546 case SNDRV_PCM_TRIGGER_STOP:
547 snd_printdd("snd_usX2Y_pcm_trigger(STOP)\n");
548 if (atomic_read(&subs->state) >= state_PRERUNNING)
549 atomic_set(&subs->state, state_PREPARED);
559 * allocate a buffer, setup samplerate
561 * so far we use a physically linear buffer although packetize transfer
562 * doesn't need a continuous area.
563 * if sg buffer is supported on the later version of alsa, we'll follow
572 { 0x14, 0x08}, // this line sets 44100, well actually a little less
573 { 0x18, 0x40}, // only tascam / frontier design knows the further lines .......
606 static struct s_c2 SetRate48000[] =
608 { 0x14, 0x09}, // this line sets 48000, well actually a little less
609 { 0x18, 0x40}, // only tascam / frontier design knows the further lines .......
642 #define NOOF_SETRATE_URBS ARRAY_SIZE(SetRate48000)
644 static void i_usX2Y_04Int(struct urb *urb)
646 struct usX2Ydev *usX2Y = urb->context;
649 snd_printk(KERN_ERR "snd_usX2Y_04Int() urb->status=%i\n", urb->status);
650 if (0 == --usX2Y->US04->len)
651 wake_up(&usX2Y->In04WaitQueue);
654 static int usX2Y_rate_set(struct usX2Ydev *usX2Y, int rate)
657 struct snd_usX2Y_urbSeq *us = NULL;
659 struct s_c2 *ra = rate == 48000 ? SetRate48000 : SetRate44100;
661 if (usX2Y->rate != rate) {
662 us = kzalloc(sizeof(*us) + sizeof(struct urb*) * NOOF_SETRATE_URBS, GFP_KERNEL);
667 usbdata = kmalloc(sizeof(int) * NOOF_SETRATE_URBS, GFP_KERNEL);
668 if (NULL == usbdata) {
672 for (i = 0; i < NOOF_SETRATE_URBS; ++i) {
673 if (NULL == (us->urb[i] = usb_alloc_urb(0, GFP_KERNEL))) {
677 ((char*)(usbdata + i))[0] = ra[i].c1;
678 ((char*)(usbdata + i))[1] = ra[i].c2;
679 usb_fill_bulk_urb(us->urb[i], usX2Y->dev, usb_sndbulkpipe(usX2Y->dev, 4),
680 usbdata + i, 2, i_usX2Y_04Int, usX2Y);
683 us->len = NOOF_SETRATE_URBS;
685 wait_event_timeout(usX2Y->In04WaitQueue, 0 == us->len, HZ);
691 us->submitted = 2*NOOF_SETRATE_URBS;
692 for (i = 0; i < NOOF_SETRATE_URBS; ++i) {
693 struct urb *urb = us->urb[i];
713 static int usX2Y_format_set(struct usX2Ydev *usX2Y, snd_pcm_format_t format)
717 if (format == SNDRV_PCM_FORMAT_S24_3LE) {
724 list_for_each(p, &usX2Y->midi_list) {
725 snd_usbmidi_input_stop(p);
727 usb_kill_urb(usX2Y->In04urb);
728 if ((err = usb_set_interface(usX2Y->dev, 0, alternate))) {
729 snd_printk(KERN_ERR "usb_set_interface error \n");
732 usX2Y->In04urb->dev = usX2Y->dev;
733 err = usb_submit_urb(usX2Y->In04urb, GFP_KERNEL);
734 list_for_each(p, &usX2Y->midi_list) {
735 snd_usbmidi_input_start(p);
737 usX2Y->format = format;
743 static int snd_usX2Y_pcm_hw_params(struct snd_pcm_substream *substream,
744 struct snd_pcm_hw_params *hw_params)
747 unsigned int rate = params_rate(hw_params);
748 snd_pcm_format_t format = params_format(hw_params);
749 struct snd_card *card = substream->pstr->pcm->card;
750 struct usX2Ydev *dev = usX2Y(card);
753 mutex_lock(&usX2Y(card)->pcm_mutex);
754 snd_printdd("snd_usX2Y_hw_params(%p, %p)\n", substream, hw_params);
755 /* all pcm substreams off one usX2Y have to operate at the same
758 for (i = 0; i < dev->pcm_devs * 2; i++) {
759 struct snd_usX2Y_substream *subs = dev->subs[i];
760 struct snd_pcm_substream *test_substream;
764 test_substream = subs->pcm_substream;
765 if (!test_substream || test_substream == substream ||
766 !test_substream->runtime)
768 if ((test_substream->runtime->format &&
769 test_substream->runtime->format != format) ||
770 (test_substream->runtime->rate &&
771 test_substream->runtime->rate != rate)) {
777 err = snd_pcm_lib_malloc_pages(substream,
778 params_buffer_bytes(hw_params));
780 snd_printk(KERN_ERR "snd_pcm_lib_malloc_pages(%p, %i) returned %i\n",
781 substream, params_buffer_bytes(hw_params), err);
786 mutex_unlock(&usX2Y(card)->pcm_mutex);
793 static int snd_usX2Y_pcm_hw_free(struct snd_pcm_substream *substream)
795 struct snd_pcm_runtime *runtime = substream->runtime;
796 struct snd_usX2Y_substream *subs = runtime->private_data;
797 mutex_lock(&subs->usX2Y->pcm_mutex);
798 snd_printdd("snd_usX2Y_hw_free(%p)\n", substream);
800 if (SNDRV_PCM_STREAM_PLAYBACK == substream->stream) {
801 struct snd_usX2Y_substream *cap_subs = subs->usX2Y->subs[SNDRV_PCM_STREAM_CAPTURE];
802 atomic_set(&subs->state, state_STOPPED);
803 usX2Y_urbs_release(subs);
804 if (!cap_subs->pcm_substream ||
805 !cap_subs->pcm_substream->runtime ||
806 !cap_subs->pcm_substream->runtime->status ||
807 cap_subs->pcm_substream->runtime->status->state < SNDRV_PCM_STATE_PREPARED) {
808 atomic_set(&cap_subs->state, state_STOPPED);
809 usX2Y_urbs_release(cap_subs);
812 struct snd_usX2Y_substream *playback_subs = subs->usX2Y->subs[SNDRV_PCM_STREAM_PLAYBACK];
813 if (atomic_read(&playback_subs->state) < state_PREPARED) {
814 atomic_set(&subs->state, state_STOPPED);
815 usX2Y_urbs_release(subs);
818 mutex_unlock(&subs->usX2Y->pcm_mutex);
819 return snd_pcm_lib_free_pages(substream);
824 * set format and initialize urbs
826 static int snd_usX2Y_pcm_prepare(struct snd_pcm_substream *substream)
828 struct snd_pcm_runtime *runtime = substream->runtime;
829 struct snd_usX2Y_substream *subs = runtime->private_data;
830 struct usX2Ydev *usX2Y = subs->usX2Y;
831 struct snd_usX2Y_substream *capsubs = subs->usX2Y->subs[SNDRV_PCM_STREAM_CAPTURE];
833 snd_printdd("snd_usX2Y_pcm_prepare(%p)\n", substream);
835 mutex_lock(&usX2Y->pcm_mutex);
836 usX2Y_subs_prepare(subs);
837 // Start hardware streams
838 // SyncStream first....
839 if (atomic_read(&capsubs->state) < state_PREPARED) {
840 if (usX2Y->format != runtime->format)
841 if ((err = usX2Y_format_set(usX2Y, runtime->format)) < 0)
842 goto up_prepare_mutex;
843 if (usX2Y->rate != runtime->rate)
844 if ((err = usX2Y_rate_set(usX2Y, runtime->rate)) < 0)
845 goto up_prepare_mutex;
846 snd_printdd("starting capture pipe for %s\n", subs == capsubs ? "self" : "playpipe");
847 if (0 > (err = usX2Y_urbs_start(capsubs)))
848 goto up_prepare_mutex;
851 if (subs != capsubs && atomic_read(&subs->state) < state_PREPARED)
852 err = usX2Y_urbs_start(subs);
855 mutex_unlock(&usX2Y->pcm_mutex);
859 static struct snd_pcm_hardware snd_usX2Y_2c =
861 .info = (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
862 SNDRV_PCM_INFO_BLOCK_TRANSFER |
863 SNDRV_PCM_INFO_MMAP_VALID |
864 SNDRV_PCM_INFO_BATCH),
865 .formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_3LE,
866 .rates = SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000,
871 .buffer_bytes_max = (2*128*1024),
872 .period_bytes_min = 64,
873 .period_bytes_max = (128*1024),
881 static int snd_usX2Y_pcm_open(struct snd_pcm_substream *substream)
883 struct snd_usX2Y_substream *subs = ((struct snd_usX2Y_substream **)
884 snd_pcm_substream_chip(substream))[substream->stream];
885 struct snd_pcm_runtime *runtime = substream->runtime;
887 if (subs->usX2Y->chip_status & USX2Y_STAT_CHIP_MMAP_PCM_URBS)
890 runtime->hw = snd_usX2Y_2c;
891 runtime->private_data = subs;
892 subs->pcm_substream = substream;
893 snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_TIME, 1000, 200000);
899 static int snd_usX2Y_pcm_close(struct snd_pcm_substream *substream)
901 struct snd_pcm_runtime *runtime = substream->runtime;
902 struct snd_usX2Y_substream *subs = runtime->private_data;
904 subs->pcm_substream = NULL;
910 static struct snd_pcm_ops snd_usX2Y_pcm_ops =
912 .open = snd_usX2Y_pcm_open,
913 .close = snd_usX2Y_pcm_close,
914 .ioctl = snd_pcm_lib_ioctl,
915 .hw_params = snd_usX2Y_pcm_hw_params,
916 .hw_free = snd_usX2Y_pcm_hw_free,
917 .prepare = snd_usX2Y_pcm_prepare,
918 .trigger = snd_usX2Y_pcm_trigger,
919 .pointer = snd_usX2Y_pcm_pointer,
924 * free a usb stream instance
926 static void usX2Y_audio_stream_free(struct snd_usX2Y_substream **usX2Y_substream)
928 kfree(usX2Y_substream[SNDRV_PCM_STREAM_PLAYBACK]);
929 usX2Y_substream[SNDRV_PCM_STREAM_PLAYBACK] = NULL;
931 kfree(usX2Y_substream[SNDRV_PCM_STREAM_CAPTURE]);
932 usX2Y_substream[SNDRV_PCM_STREAM_CAPTURE] = NULL;
935 static void snd_usX2Y_pcm_private_free(struct snd_pcm *pcm)
937 struct snd_usX2Y_substream **usX2Y_stream = pcm->private_data;
939 usX2Y_audio_stream_free(usX2Y_stream);
942 static int usX2Y_audio_stream_new(struct snd_card *card, int playback_endpoint, int capture_endpoint)
946 struct snd_usX2Y_substream **usX2Y_substream =
947 usX2Y(card)->subs + 2 * usX2Y(card)->pcm_devs;
949 for (i = playback_endpoint ? SNDRV_PCM_STREAM_PLAYBACK : SNDRV_PCM_STREAM_CAPTURE;
950 i <= SNDRV_PCM_STREAM_CAPTURE; ++i) {
951 usX2Y_substream[i] = kzalloc(sizeof(struct snd_usX2Y_substream), GFP_KERNEL);
952 if (NULL == usX2Y_substream[i]) {
953 snd_printk(KERN_ERR "cannot malloc\n");
956 usX2Y_substream[i]->usX2Y = usX2Y(card);
959 if (playback_endpoint)
960 usX2Y_substream[SNDRV_PCM_STREAM_PLAYBACK]->endpoint = playback_endpoint;
961 usX2Y_substream[SNDRV_PCM_STREAM_CAPTURE]->endpoint = capture_endpoint;
963 err = snd_pcm_new(card, NAME_ALLCAPS" Audio", usX2Y(card)->pcm_devs,
964 playback_endpoint ? 1 : 0, 1,
967 usX2Y_audio_stream_free(usX2Y_substream);
971 if (playback_endpoint)
972 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_usX2Y_pcm_ops);
973 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_usX2Y_pcm_ops);
975 pcm->private_data = usX2Y_substream;
976 pcm->private_free = snd_usX2Y_pcm_private_free;
979 sprintf(pcm->name, NAME_ALLCAPS" Audio #%d", usX2Y(card)->pcm_devs);
981 if ((playback_endpoint &&
982 0 > (err = snd_pcm_lib_preallocate_pages(pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream,
983 SNDRV_DMA_TYPE_CONTINUOUS,
984 snd_dma_continuous_data(GFP_KERNEL),
985 64*1024, 128*1024))) ||
986 0 > (err = snd_pcm_lib_preallocate_pages(pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream,
987 SNDRV_DMA_TYPE_CONTINUOUS,
988 snd_dma_continuous_data(GFP_KERNEL),
989 64*1024, 128*1024))) {
990 snd_usX2Y_pcm_private_free(pcm);
993 usX2Y(card)->pcm_devs++;
999 * create a chip instance and set its names.
1001 int usX2Y_audio_create(struct snd_card *card)
1005 INIT_LIST_HEAD(&usX2Y(card)->pcm_list);
1007 if (0 > (err = usX2Y_audio_stream_new(card, 0xA, 0x8)))
1009 if (le16_to_cpu(usX2Y(card)->dev->descriptor.idProduct) == USB_ID_US428)
1010 if (0 > (err = usX2Y_audio_stream_new(card, 0, 0xA)))
1012 if (le16_to_cpu(usX2Y(card)->dev->descriptor.idProduct) != USB_ID_US122)
1013 err = usX2Y_rate_set(usX2Y(card), 44100); // Lets us428 recognize output-volume settings, disturbs us122.