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 <sound/driver.h>
35 #include <linux/interrupt.h>
36 #include <linux/usb.h>
37 #include <sound/core.h>
38 #include <sound/info.h>
39 #include <sound/pcm.h>
40 #include <sound/pcm_params.h>
44 #define USX2Y_NRPACKS 4 /* Default value used for nr of packs per urb.
45 1 to 4 have been tested ok on uhci.
46 To use 3 on ohci, you'd need a patch:
47 look for "0000425-linux-2.6.9-rc4-mm1_ohci-hcd.patch.gz" on
48 "https://bugtrack.alsa-project.org/alsa-bug/bug_view_page.php?bug_id=0000425"
50 1, 2 and 4 work out of the box on ohci, if I recall correctly.
51 Bigger is safer operation,
52 smaller gives lower latencies.
54 #define USX2Y_NRPACKS_VARIABLE y /* If your system works ok with this module's parameter
55 nrpacks set to 1, you might as well comment
56 this #define out, and thereby produce smaller, faster code.
57 You'd also set USX2Y_NRPACKS to 1 then.
60 #ifdef USX2Y_NRPACKS_VARIABLE
61 static int nrpacks = USX2Y_NRPACKS; /* number of packets per urb */
62 #define nr_of_packs() nrpacks
63 module_param(nrpacks, int, 0444);
64 MODULE_PARM_DESC(nrpacks, "Number of packets per URB.");
66 #define nr_of_packs() USX2Y_NRPACKS
70 static int usX2Y_urb_capt_retire(snd_usX2Y_substream_t *subs)
72 struct urb *urb = subs->completed_urb;
73 snd_pcm_runtime_t *runtime = subs->pcm_substream->runtime;
75 int i, len, lens = 0, hwptr_done = subs->hwptr_done;
76 usX2Ydev_t *usX2Y = subs->usX2Y;
78 for (i = 0; i < nr_of_packs(); i++) {
79 cp = (unsigned char*)urb->transfer_buffer + urb->iso_frame_desc[i].offset;
80 if (urb->iso_frame_desc[i].status) { /* active? hmm, skip this */
81 snd_printk("activ frame status %i. Most propably some hardware problem.\n", urb->iso_frame_desc[i].status);
82 return urb->iso_frame_desc[i].status;
84 len = urb->iso_frame_desc[i].actual_length / usX2Y->stride;
86 snd_printd("0 == len ERROR!\n");
90 /* copy a data chunk */
91 if ((hwptr_done + len) > runtime->buffer_size) {
92 int cnt = runtime->buffer_size - hwptr_done;
93 int blen = cnt * usX2Y->stride;
94 memcpy(runtime->dma_area + hwptr_done * usX2Y->stride, cp, blen);
95 memcpy(runtime->dma_area, cp + blen, len * usX2Y->stride - blen);
97 memcpy(runtime->dma_area + hwptr_done * usX2Y->stride, cp, len * usX2Y->stride);
100 if ((hwptr_done += len) >= runtime->buffer_size)
101 hwptr_done -= runtime->buffer_size;
104 subs->hwptr_done = hwptr_done;
105 subs->transfer_done += lens;
106 /* update the pointer, call callback if necessary */
107 if (subs->transfer_done >= runtime->period_size) {
108 subs->transfer_done -= runtime->period_size;
109 snd_pcm_period_elapsed(subs->pcm_substream);
114 * prepare urb for playback data pipe
116 * we copy the data directly from the pcm buffer.
117 * the current position to be copied is held in hwptr field.
118 * since a urb can handle only a single linear buffer, if the total
119 * transferred area overflows the buffer boundary, we cannot send
120 * it directly from the buffer. thus the data is once copied to
121 * a temporary buffer and urb points to that.
123 static int usX2Y_urb_play_prepare(snd_usX2Y_substream_t *subs,
127 int count, counts, pack;
128 usX2Ydev_t* usX2Y = subs->usX2Y;
129 snd_pcm_runtime_t *runtime = subs->pcm_substream->runtime;
132 for (pack = 0; pack < nr_of_packs(); pack++) {
133 /* calculate the size of a packet */
134 counts = cap_urb->iso_frame_desc[pack].actual_length / usX2Y->stride;
136 if (counts < 43 || counts > 50) {
137 snd_printk("should not be here with counts=%i\n", counts);
140 /* set up descriptor */
141 urb->iso_frame_desc[pack].offset = pack ?
142 urb->iso_frame_desc[pack - 1].offset + urb->iso_frame_desc[pack - 1].length :
144 urb->iso_frame_desc[pack].length = cap_urb->iso_frame_desc[pack].actual_length;
146 if (atomic_read(&subs->state) >= state_PRERUNNING)
147 if (subs->hwptr + count > runtime->buffer_size) {
148 /* err, the transferred area goes over buffer boundary.
149 * copy the data to the temp buffer.
152 len = runtime->buffer_size - subs->hwptr;
153 urb->transfer_buffer = subs->tmpbuf;
154 memcpy(subs->tmpbuf, runtime->dma_area + subs->hwptr * usX2Y->stride, len * usX2Y->stride);
155 memcpy(subs->tmpbuf + len * usX2Y->stride, runtime->dma_area, (count - len) * usX2Y->stride);
156 subs->hwptr += count;
157 subs->hwptr -= runtime->buffer_size;
159 /* set the buffer pointer */
160 urb->transfer_buffer = runtime->dma_area + subs->hwptr * usX2Y->stride;
161 if ((subs->hwptr += count) >= runtime->buffer_size)
162 subs->hwptr -= runtime->buffer_size;
165 urb->transfer_buffer = subs->tmpbuf;
166 urb->transfer_buffer_length = count * usX2Y->stride;
171 * process after playback data complete
173 * update the current position and call callback if a period is processed.
175 static void usX2Y_urb_play_retire(snd_usX2Y_substream_t *subs, struct urb *urb)
177 snd_pcm_runtime_t *runtime = subs->pcm_substream->runtime;
178 int len = urb->actual_length / subs->usX2Y->stride;
180 subs->transfer_done += len;
181 subs->hwptr_done += len;
182 if (subs->hwptr_done >= runtime->buffer_size)
183 subs->hwptr_done -= runtime->buffer_size;
184 if (subs->transfer_done >= runtime->period_size) {
185 subs->transfer_done -= runtime->period_size;
186 snd_pcm_period_elapsed(subs->pcm_substream);
190 static int usX2Y_urb_submit(snd_usX2Y_substream_t *subs, struct urb *urb, int frame)
195 urb->start_frame = (frame + NRURBS * nr_of_packs()); // let hcd do rollover sanity checks
197 urb->dev = subs->usX2Y->chip.dev; /* we need to set this at each time */
198 if ((err = usb_submit_urb(urb, GFP_ATOMIC)) < 0) {
199 snd_printk("usb_submit_urb() returned %i\n", err);
205 static inline int usX2Y_usbframe_complete(snd_usX2Y_substream_t *capsubs, snd_usX2Y_substream_t *playbacksubs, int frame)
209 struct urb *urb = playbacksubs->completed_urb;
211 state = atomic_read(&playbacksubs->state);
213 if (state == state_RUNNING)
214 usX2Y_urb_play_retire(playbacksubs, urb);
216 if (state >= state_PRERUNNING) {
217 atomic_inc(&playbacksubs->state);
221 case state_STARTING1:
222 urb = playbacksubs->urb[0];
223 atomic_inc(&playbacksubs->state);
225 case state_STARTING2:
226 urb = playbacksubs->urb[1];
227 atomic_inc(&playbacksubs->state);
232 if ((err = usX2Y_urb_play_prepare(playbacksubs, capsubs->completed_urb, urb)) ||
233 (err = usX2Y_urb_submit(playbacksubs, urb, frame))) {
238 playbacksubs->completed_urb = NULL;
240 state = atomic_read(&capsubs->state);
241 if (state >= state_PREPARED) {
242 if (state == state_RUNNING) {
243 if ((err = usX2Y_urb_capt_retire(capsubs)))
246 if (state >= state_PRERUNNING) {
247 atomic_inc(&capsubs->state);
249 if ((err = usX2Y_urb_submit(capsubs, capsubs->completed_urb, frame)))
252 capsubs->completed_urb = NULL;
257 static void usX2Y_clients_stop(usX2Ydev_t *usX2Y)
260 for (s = 0; s < 4; s++) {
261 snd_usX2Y_substream_t *subs = usX2Y->subs[s];
263 snd_printdd("%i %p state=%i\n", s, subs, atomic_read(&subs->state));
264 atomic_set(&subs->state, state_STOPPED);
267 for (s = 0; s < 4; s++) {
268 snd_usX2Y_substream_t *subs = usX2Y->subs[s];
270 if (atomic_read(&subs->state) >= state_PRERUNNING) {
271 snd_pcm_stop(subs->pcm_substream, SNDRV_PCM_STATE_XRUN);
273 for (u = 0; u < NRURBS; u++) {
274 struct urb *urb = subs->urb[u];
276 snd_printdd("%i status=%i start_frame=%i\n", u, urb->status, urb->start_frame);
280 usX2Y->prepare_subs = NULL;
281 wake_up(&usX2Y->prepare_wait_queue);
284 static void usX2Y_error_urb_status(usX2Ydev_t *usX2Y, snd_usX2Y_substream_t *subs, struct urb *urb)
286 snd_printk("ep=%i stalled with status=%i\n", subs->endpoint, urb->status);
288 usX2Y_clients_stop(usX2Y);
291 static void usX2Y_error_sequence(usX2Ydev_t *usX2Y, snd_usX2Y_substream_t *subs, struct urb *urb)
293 snd_printk("Sequence Error!(hcd_frame=%i ep=%i%s;wait=%i,frame=%i).\n"
294 "Most propably some urb of usb-frame %i is still missing.\n"
295 "Cause could be too long delays in usb-hcd interrupt handling.\n",
296 usb_get_current_frame_number(usX2Y->chip.dev),
297 subs->endpoint, usb_pipein(urb->pipe) ? "in" : "out", usX2Y->wait_iso_frame, urb->start_frame, usX2Y->wait_iso_frame);
298 usX2Y_clients_stop(usX2Y);
301 static void i_usX2Y_urb_complete(struct urb *urb, struct pt_regs *regs)
303 snd_usX2Y_substream_t *subs = (snd_usX2Y_substream_t*)urb->context;
304 usX2Ydev_t *usX2Y = subs->usX2Y;
306 if (unlikely(atomic_read(&subs->state) < state_PREPARED)) {
307 snd_printdd("hcd_frame=%i ep=%i%s status=%i start_frame=%i\n", usb_get_current_frame_number(usX2Y->chip.dev), subs->endpoint, usb_pipein(urb->pipe) ? "in" : "out", urb->status, urb->start_frame);
310 if (unlikely(urb->status)) {
311 usX2Y_error_urb_status(usX2Y, subs, urb);
314 if (likely((0xFFFF & urb->start_frame) == usX2Y->wait_iso_frame))
315 subs->completed_urb = urb;
317 usX2Y_error_sequence(usX2Y, subs, urb);
321 snd_usX2Y_substream_t *capsubs = usX2Y->subs[SNDRV_PCM_STREAM_CAPTURE],
322 *playbacksubs = usX2Y->subs[SNDRV_PCM_STREAM_PLAYBACK];
323 if (capsubs->completed_urb && atomic_read(&capsubs->state) >= state_PREPARED &&
324 (playbacksubs->completed_urb || atomic_read(&playbacksubs->state) < state_PREPARED)) {
325 if (!usX2Y_usbframe_complete(capsubs, playbacksubs, urb->start_frame)) {
326 if (nr_of_packs() <= urb->start_frame &&
327 urb->start_frame <= (2 * nr_of_packs() - 1)) // uhci and ohci
328 usX2Y->wait_iso_frame = urb->start_frame - nr_of_packs();
330 usX2Y->wait_iso_frame += nr_of_packs();
333 usX2Y_clients_stop(usX2Y);
339 static void usX2Y_urbs_set_complete(usX2Ydev_t * usX2Y, void (*complete)(struct urb *, struct pt_regs *))
342 for (s = 0; s < 4; s++) {
343 snd_usX2Y_substream_t *subs = usX2Y->subs[s];
345 for (u = 0; u < NRURBS; u++) {
346 struct urb * urb = subs->urb[u];
348 urb->complete = complete;
353 static void usX2Y_subs_startup_finish(usX2Ydev_t * usX2Y)
355 usX2Y_urbs_set_complete(usX2Y, i_usX2Y_urb_complete);
356 usX2Y->prepare_subs = NULL;
359 static void i_usX2Y_subs_startup(struct urb *urb, struct pt_regs *regs)
361 snd_usX2Y_substream_t *subs = (snd_usX2Y_substream_t*)urb->context;
362 usX2Ydev_t *usX2Y = subs->usX2Y;
363 snd_usX2Y_substream_t *prepare_subs = usX2Y->prepare_subs;
364 if (NULL != prepare_subs)
365 if (urb->start_frame == prepare_subs->urb[0]->start_frame) {
366 usX2Y_subs_startup_finish(usX2Y);
367 atomic_inc(&prepare_subs->state);
368 wake_up(&usX2Y->prepare_wait_queue);
371 i_usX2Y_urb_complete(urb, regs);
374 static void usX2Y_subs_prepare(snd_usX2Y_substream_t *subs)
376 snd_printdd("usX2Y_substream_prepare(%p) ep=%i urb0=%p urb1=%p\n", subs, subs->endpoint, subs->urb[0], subs->urb[1]);
377 /* reset the pointer */
379 subs->hwptr_done = 0;
380 subs->transfer_done = 0;
384 static void usX2Y_urb_release(struct urb** urb, int free_tb)
389 kfree((*urb)->transfer_buffer);
395 * release a substreams urbs
397 static void usX2Y_urbs_release(snd_usX2Y_substream_t *subs)
400 snd_printdd("usX2Y_urbs_release() %i\n", subs->endpoint);
401 for (i = 0; i < NRURBS; i++)
402 usX2Y_urb_release(subs->urb + i, subs != subs->usX2Y->subs[SNDRV_PCM_STREAM_PLAYBACK]);
410 * initialize a substream's urbs
412 static int usX2Y_urbs_allocate(snd_usX2Y_substream_t *subs)
416 int is_playback = subs == subs->usX2Y->subs[SNDRV_PCM_STREAM_PLAYBACK];
417 struct usb_device *dev = subs->usX2Y->chip.dev;
419 pipe = is_playback ? usb_sndisocpipe(dev, subs->endpoint) :
420 usb_rcvisocpipe(dev, subs->endpoint);
421 subs->maxpacksize = usb_maxpacket(dev, pipe, is_playback);
422 if (!subs->maxpacksize)
425 if (is_playback && NULL == subs->tmpbuf) { /* allocate a temporary buffer for playback */
426 subs->tmpbuf = kcalloc(nr_of_packs(), subs->maxpacksize, GFP_KERNEL);
427 if (NULL == subs->tmpbuf) {
428 snd_printk(KERN_ERR "cannot malloc tmpbuf\n");
432 /* allocate and initialize data urbs */
433 for (i = 0; i < NRURBS; i++) {
434 struct urb** purb = subs->urb + i;
439 *purb = usb_alloc_urb(nr_of_packs(), GFP_KERNEL);
441 usX2Y_urbs_release(subs);
444 if (!is_playback && !(*purb)->transfer_buffer) {
445 /* allocate a capture buffer per urb */
446 (*purb)->transfer_buffer = kmalloc(subs->maxpacksize * nr_of_packs(), GFP_KERNEL);
447 if (NULL == (*purb)->transfer_buffer) {
448 usX2Y_urbs_release(subs);
453 (*purb)->pipe = pipe;
454 (*purb)->number_of_packets = nr_of_packs();
455 (*purb)->context = subs;
456 (*purb)->interval = 1;
457 (*purb)->complete = i_usX2Y_subs_startup;
462 static void usX2Y_subs_startup(snd_usX2Y_substream_t *subs)
464 usX2Ydev_t *usX2Y = subs->usX2Y;
465 usX2Y->prepare_subs = subs;
466 subs->urb[0]->start_frame = -1;
468 usX2Y_urbs_set_complete(usX2Y, i_usX2Y_subs_startup);
471 static int usX2Y_urbs_start(snd_usX2Y_substream_t *subs)
474 usX2Ydev_t *usX2Y = subs->usX2Y;
476 if ((err = usX2Y_urbs_allocate(subs)) < 0)
478 subs->completed_urb = NULL;
479 for (i = 0; i < 4; i++) {
480 snd_usX2Y_substream_t *subs = usX2Y->subs[i];
481 if (subs != NULL && atomic_read(&subs->state) >= state_PREPARED)
484 usX2Y->wait_iso_frame = -1;
487 usX2Y_subs_startup(subs);
488 for (i = 0; i < NRURBS; i++) {
489 struct urb *urb = subs->urb[i];
490 if (usb_pipein(urb->pipe)) {
493 atomic_set(&subs->state, state_STARTING3);
494 urb->dev = usX2Y->chip.dev;
495 urb->transfer_flags = URB_ISO_ASAP;
496 for (pack = 0; pack < nr_of_packs(); pack++) {
497 urb->iso_frame_desc[pack].offset = subs->maxpacksize * pack;
498 urb->iso_frame_desc[pack].length = subs->maxpacksize;
500 urb->transfer_buffer_length = subs->maxpacksize * nr_of_packs();
501 if ((err = usb_submit_urb(urb, GFP_ATOMIC)) < 0) {
502 snd_printk (KERN_ERR "cannot submit datapipe for urb %d, err = %d\n", i, err);
506 if (0 > usX2Y->wait_iso_frame)
507 usX2Y->wait_iso_frame = urb->start_frame;
509 urb->transfer_flags = 0;
511 atomic_set(&subs->state, state_STARTING1);
516 wait_event(usX2Y->prepare_wait_queue, NULL == usX2Y->prepare_subs);
517 if (atomic_read(&subs->state) != state_PREPARED) {
523 usX2Y_subs_startup_finish(usX2Y);
524 usX2Y_clients_stop(usX2Y); // something is completely wroong > stop evrything
531 * return the current pcm pointer. just return the hwptr_done value.
533 static snd_pcm_uframes_t snd_usX2Y_pcm_pointer(snd_pcm_substream_t *substream)
535 snd_usX2Y_substream_t *subs = (snd_usX2Y_substream_t *)substream->runtime->private_data;
536 return subs->hwptr_done;
539 * start/stop substream
541 static int snd_usX2Y_pcm_trigger(snd_pcm_substream_t *substream, int cmd)
543 snd_usX2Y_substream_t *subs = (snd_usX2Y_substream_t *)substream->runtime->private_data;
546 case SNDRV_PCM_TRIGGER_START:
547 snd_printdd("snd_usX2Y_pcm_trigger(START)\n");
548 if (atomic_read(&subs->state) == state_PREPARED &&
549 atomic_read(&subs->usX2Y->subs[SNDRV_PCM_STREAM_CAPTURE]->state) >= state_PREPARED) {
550 atomic_set(&subs->state, state_PRERUNNING);
556 case SNDRV_PCM_TRIGGER_STOP:
557 snd_printdd("snd_usX2Y_pcm_trigger(STOP)\n");
558 if (atomic_read(&subs->state) >= state_PRERUNNING)
559 atomic_set(&subs->state, state_PREPARED);
569 * allocate a buffer, setup samplerate
571 * so far we use a physically linear buffer although packetize transfer
572 * doesn't need a continuous area.
573 * if sg buffer is supported on the later version of alsa, we'll follow
582 { 0x14, 0x08}, // this line sets 44100, well actually a little less
583 { 0x18, 0x40}, // only tascam / frontier design knows the further lines .......
616 static struct s_c2 SetRate48000[] =
618 { 0x14, 0x09}, // this line sets 48000, well actually a little less
619 { 0x18, 0x40}, // only tascam / frontier design knows the further lines .......
652 #define NOOF_SETRATE_URBS ARRAY_SIZE(SetRate48000)
654 static void i_usX2Y_04Int(struct urb* urb, struct pt_regs *regs)
656 usX2Ydev_t* usX2Y = urb->context;
659 snd_printk("snd_usX2Y_04Int() urb->status=%i\n", urb->status);
661 if (0 == --usX2Y->US04->len)
662 wake_up(&usX2Y->In04WaitQueue);
665 static int usX2Y_rate_set(usX2Ydev_t *usX2Y, int rate)
668 snd_usX2Y_urbSeq_t *us = NULL;
670 struct s_c2 *ra = rate == 48000 ? SetRate48000 : SetRate44100;
672 if (usX2Y->rate != rate) {
673 us = kmalloc(sizeof(*us) + sizeof(struct urb*) * NOOF_SETRATE_URBS, GFP_KERNEL);
678 memset(us, 0, sizeof(*us) + sizeof(struct urb*) * NOOF_SETRATE_URBS);
679 usbdata = kmalloc(sizeof(int)*NOOF_SETRATE_URBS, GFP_KERNEL);
680 if (NULL == usbdata) {
684 for (i = 0; i < NOOF_SETRATE_URBS; ++i) {
685 if (NULL == (us->urb[i] = usb_alloc_urb(0, GFP_KERNEL))) {
689 ((char*)(usbdata + i))[0] = ra[i].c1;
690 ((char*)(usbdata + i))[1] = ra[i].c2;
691 usb_fill_bulk_urb(us->urb[i], usX2Y->chip.dev, usb_sndbulkpipe(usX2Y->chip.dev, 4),
692 usbdata + i, 2, i_usX2Y_04Int, usX2Y);
694 us->urb[i]->transfer_flags = USB_QUEUE_BULK;
698 us->len = NOOF_SETRATE_URBS;
700 wait_event_timeout(usX2Y->In04WaitQueue, 0 == us->len, HZ);
706 us->submitted = 2*NOOF_SETRATE_URBS;
707 for (i = 0; i < NOOF_SETRATE_URBS; ++i) {
708 struct urb *urb = us->urb[i];
729 static int usX2Y_format_set(usX2Ydev_t *usX2Y, snd_pcm_format_t format)
733 if (format == SNDRV_PCM_FORMAT_S24_3LE) {
740 list_for_each(p, &usX2Y->chip.midi_list) {
741 snd_usbmidi_input_stop(p);
743 usb_kill_urb(usX2Y->In04urb);
744 if ((err = usb_set_interface(usX2Y->chip.dev, 0, alternate))) {
745 snd_printk("usb_set_interface error \n");
748 usX2Y->In04urb->dev = usX2Y->chip.dev;
749 err = usb_submit_urb(usX2Y->In04urb, GFP_KERNEL);
750 list_for_each(p, &usX2Y->chip.midi_list) {
751 snd_usbmidi_input_start(p);
753 usX2Y->format = format;
759 static int snd_usX2Y_pcm_hw_params(snd_pcm_substream_t *substream,
760 snd_pcm_hw_params_t *hw_params)
763 unsigned int rate = params_rate(hw_params);
764 snd_pcm_format_t format = params_format(hw_params);
765 snd_printdd("snd_usX2Y_hw_params(%p, %p)\n", substream, hw_params);
767 { // all pcm substreams off one usX2Y have to operate at the same rate & format
768 snd_card_t *card = substream->pstr->pcm->card;
769 struct list_head *list;
770 list_for_each(list, &card->devices) {
774 dev = snd_device(list);
775 if (dev->type != SNDRV_DEV_PCM)
777 pcm = dev->device_data;
778 for (s = 0; s < 2; ++s) {
779 snd_pcm_substream_t *test_substream;
780 test_substream = pcm->streams[s].substream;
781 if (test_substream && test_substream != substream &&
782 test_substream->runtime &&
783 ((test_substream->runtime->format &&
784 test_substream->runtime->format != format) ||
785 (test_substream->runtime->rate &&
786 test_substream->runtime->rate != rate)))
791 if (0 > (err = snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(hw_params)))) {
792 snd_printk("snd_pcm_lib_malloc_pages(%p, %i) returned %i\n", substream, params_buffer_bytes(hw_params), err);
801 static int snd_usX2Y_pcm_hw_free(snd_pcm_substream_t *substream)
803 snd_pcm_runtime_t *runtime = substream->runtime;
804 snd_usX2Y_substream_t *subs = (snd_usX2Y_substream_t *)runtime->private_data;
805 down(&subs->usX2Y->prepare_mutex);
806 snd_printdd("snd_usX2Y_hw_free(%p)\n", substream);
808 if (SNDRV_PCM_STREAM_PLAYBACK == substream->stream) {
809 snd_usX2Y_substream_t *cap_subs = subs->usX2Y->subs[SNDRV_PCM_STREAM_CAPTURE];
810 atomic_set(&subs->state, state_STOPPED);
811 usX2Y_urbs_release(subs);
812 if (!cap_subs->pcm_substream ||
813 !cap_subs->pcm_substream->runtime ||
814 !cap_subs->pcm_substream->runtime->status ||
815 cap_subs->pcm_substream->runtime->status->state < SNDRV_PCM_STATE_PREPARED) {
816 atomic_set(&cap_subs->state, state_STOPPED);
817 usX2Y_urbs_release(cap_subs);
820 snd_usX2Y_substream_t *playback_subs = subs->usX2Y->subs[SNDRV_PCM_STREAM_PLAYBACK];
821 if (atomic_read(&playback_subs->state) < state_PREPARED) {
822 atomic_set(&subs->state, state_STOPPED);
823 usX2Y_urbs_release(subs);
826 up(&subs->usX2Y->prepare_mutex);
827 return snd_pcm_lib_free_pages(substream);
832 * set format and initialize urbs
834 static int snd_usX2Y_pcm_prepare(snd_pcm_substream_t *substream)
836 snd_pcm_runtime_t *runtime = substream->runtime;
837 snd_usX2Y_substream_t *subs = (snd_usX2Y_substream_t *)runtime->private_data;
838 usX2Ydev_t *usX2Y = subs->usX2Y;
839 snd_usX2Y_substream_t *capsubs = subs->usX2Y->subs[SNDRV_PCM_STREAM_CAPTURE];
841 snd_printdd("snd_usX2Y_pcm_prepare(%p)\n", substream);
843 down(&usX2Y->prepare_mutex);
844 usX2Y_subs_prepare(subs);
845 // Start hardware streams
846 // SyncStream first....
847 if (atomic_read(&capsubs->state) < state_PREPARED) {
848 if (usX2Y->format != runtime->format)
849 if ((err = usX2Y_format_set(usX2Y, runtime->format)) < 0)
850 goto up_prepare_mutex;
851 if (usX2Y->rate != runtime->rate)
852 if ((err = usX2Y_rate_set(usX2Y, runtime->rate)) < 0)
853 goto up_prepare_mutex;
854 snd_printdd("starting capture pipe for %s\n", subs == capsubs ? "self" : "playpipe");
855 if (0 > (err = usX2Y_urbs_start(capsubs)))
856 goto up_prepare_mutex;
859 if (subs != capsubs && atomic_read(&subs->state) < state_PREPARED)
860 err = usX2Y_urbs_start(subs);
863 up(&usX2Y->prepare_mutex);
867 static snd_pcm_hardware_t snd_usX2Y_2c =
869 .info = (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
870 SNDRV_PCM_INFO_BLOCK_TRANSFER |
871 SNDRV_PCM_INFO_MMAP_VALID),
872 .formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_3LE,
873 .rates = SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000,
878 .buffer_bytes_max = (2*128*1024),
879 .period_bytes_min = 64,
880 .period_bytes_max = (128*1024),
888 static int snd_usX2Y_pcm_open(snd_pcm_substream_t *substream)
890 snd_usX2Y_substream_t *subs = ((snd_usX2Y_substream_t **)
891 snd_pcm_substream_chip(substream))[substream->stream];
892 snd_pcm_runtime_t *runtime = substream->runtime;
894 if (subs->usX2Y->chip_status & USX2Y_STAT_CHIP_MMAP_PCM_URBS)
897 runtime->hw = snd_usX2Y_2c;
898 runtime->private_data = subs;
899 subs->pcm_substream = substream;
900 snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_TIME, 1000, 200000);
906 static int snd_usX2Y_pcm_close(snd_pcm_substream_t *substream)
908 snd_pcm_runtime_t *runtime = substream->runtime;
909 snd_usX2Y_substream_t *subs = (snd_usX2Y_substream_t *)runtime->private_data;
912 subs->pcm_substream = NULL;
918 static snd_pcm_ops_t snd_usX2Y_pcm_ops =
920 .open = snd_usX2Y_pcm_open,
921 .close = snd_usX2Y_pcm_close,
922 .ioctl = snd_pcm_lib_ioctl,
923 .hw_params = snd_usX2Y_pcm_hw_params,
924 .hw_free = snd_usX2Y_pcm_hw_free,
925 .prepare = snd_usX2Y_pcm_prepare,
926 .trigger = snd_usX2Y_pcm_trigger,
927 .pointer = snd_usX2Y_pcm_pointer,
932 * free a usb stream instance
934 static void usX2Y_audio_stream_free(snd_usX2Y_substream_t **usX2Y_substream)
936 if (NULL != usX2Y_substream[SNDRV_PCM_STREAM_PLAYBACK]) {
937 kfree(usX2Y_substream[SNDRV_PCM_STREAM_PLAYBACK]);
938 usX2Y_substream[SNDRV_PCM_STREAM_PLAYBACK] = NULL;
940 kfree(usX2Y_substream[SNDRV_PCM_STREAM_CAPTURE]);
941 usX2Y_substream[SNDRV_PCM_STREAM_CAPTURE] = NULL;
944 static void snd_usX2Y_pcm_private_free(snd_pcm_t *pcm)
946 snd_usX2Y_substream_t **usX2Y_stream = pcm->private_data;
948 snd_pcm_lib_preallocate_free_for_all(pcm);
949 usX2Y_audio_stream_free(usX2Y_stream);
953 static int usX2Y_audio_stream_new(snd_card_t *card, int playback_endpoint, int capture_endpoint)
957 snd_usX2Y_substream_t **usX2Y_substream =
958 usX2Y(card)->subs + 2 * usX2Y(card)->chip.pcm_devs;
960 for (i = playback_endpoint ? SNDRV_PCM_STREAM_PLAYBACK : SNDRV_PCM_STREAM_CAPTURE;
961 i <= SNDRV_PCM_STREAM_CAPTURE; ++i) {
962 usX2Y_substream[i] = kcalloc(1, sizeof(snd_usX2Y_substream_t), GFP_KERNEL);
963 if (NULL == usX2Y_substream[i]) {
964 snd_printk(KERN_ERR "cannot malloc\n");
967 usX2Y_substream[i]->usX2Y = usX2Y(card);
970 if (playback_endpoint)
971 usX2Y_substream[SNDRV_PCM_STREAM_PLAYBACK]->endpoint = playback_endpoint;
972 usX2Y_substream[SNDRV_PCM_STREAM_CAPTURE]->endpoint = capture_endpoint;
974 err = snd_pcm_new(card, NAME_ALLCAPS" Audio", usX2Y(card)->chip.pcm_devs,
975 playback_endpoint ? 1 : 0, 1,
978 usX2Y_audio_stream_free(usX2Y_substream);
982 if (playback_endpoint)
983 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_usX2Y_pcm_ops);
984 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_usX2Y_pcm_ops);
986 pcm->private_data = usX2Y_substream;
987 pcm->private_free = snd_usX2Y_pcm_private_free;
990 sprintf(pcm->name, NAME_ALLCAPS" Audio #%d", usX2Y(card)->chip.pcm_devs);
992 if ((playback_endpoint &&
993 0 > (err = snd_pcm_lib_preallocate_pages(pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream,
994 SNDRV_DMA_TYPE_CONTINUOUS,
995 snd_dma_continuous_data(GFP_KERNEL),
996 64*1024, 128*1024))) ||
997 0 > (err = snd_pcm_lib_preallocate_pages(pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream,
998 SNDRV_DMA_TYPE_CONTINUOUS,
999 snd_dma_continuous_data(GFP_KERNEL),
1000 64*1024, 128*1024))) {
1001 snd_usX2Y_pcm_private_free(pcm);
1004 usX2Y(card)->chip.pcm_devs++;
1010 * create a chip instance and set its names.
1012 int usX2Y_audio_create(snd_card_t* card)
1016 INIT_LIST_HEAD(&usX2Y(card)->chip.pcm_list);
1018 if (0 > (err = usX2Y_audio_stream_new(card, 0xA, 0x8)))
1020 if (le16_to_cpu(usX2Y(card)->chip.dev->descriptor.idProduct) == USB_ID_US428)
1021 if (0 > (err = usX2Y_audio_stream_new(card, 0, 0xA)))
1023 if (le16_to_cpu(usX2Y(card)->chip.dev->descriptor.idProduct) != USB_ID_US122)
1024 err = usX2Y_rate_set(usX2Y(card), 44100); // Lets us428 recognize output-volume settings, disturbs us122.