1 /*
2 * US-X2Y AUDIO
3 * Copyright (c) 2002-2004 by Karsten Wiese
4 *
5 * based on
6 *
7 * (Tentative) USB Audio Driver for ALSA
8 *
9 * Main and PCM part
10 *
11 * Copyright (c) 2002 by Takashi Iwai <tiwai@suse.de>
12 *
13 * Many codes borrowed from audio.c by
14 * Alan Cox (alan@lxorguk.ukuu.org.uk)
15 * Thomas Sailer (sailer@ife.ee.ethz.ch)
16 *
17 *
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.
22 *
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.
27 *
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
31 */
32
33
34 #include <linux/interrupt.h>
35 #include <linux/usb.h>
36 #include <sound/core.h>
37 #include <sound/info.h>
38 #include <sound/pcm.h>
39 #include <sound/pcm_params.h>
40 #include "usx2y.h"
41 #include "usbusx2y.h"
42
43 #define USX2Y_NRPACKS 4 /* Default value used for nr of packs per urb.
44 1 to 4 have been tested ok on uhci.
45 To use 3 on ohci, you'd need a patch:
46 look for "0000425-linux-2.6.9-rc4-mm1_ohci-hcd.patch.gz" on
47 "https://bugtrack.alsa-project.org/alsa-bug/bug_view_page.php?bug_id=0000425"
48 .
49 1, 2 and 4 work out of the box on ohci, if I recall correctly.
50 Bigger is safer operation,
51 smaller gives lower latencies.
52 */
53 #define USX2Y_NRPACKS_VARIABLE y /* If your system works ok with this module's parameter
54 nrpacks set to 1, you might as well comment
55 this #define out, and thereby produce smaller, faster code.
56 You'd also set USX2Y_NRPACKS to 1 then.
57 */
58
59 #ifdef USX2Y_NRPACKS_VARIABLE
60 static int nrpacks = USX2Y_NRPACKS; /* number of packets per urb */
61 #define nr_of_packs() nrpacks
62 module_param(nrpacks, int, 0444);
63 MODULE_PARM_DESC(nrpacks, "Number of packets per URB.");
64 #else
65 #define nr_of_packs() USX2Y_NRPACKS
66 #endif
67
68
usX2Y_urb_capt_retire(struct snd_usX2Y_substream * subs)69 static int usX2Y_urb_capt_retire(struct snd_usX2Y_substream *subs)
70 {
71 struct urb *urb = subs->completed_urb;
72 struct snd_pcm_runtime *runtime = subs->pcm_substream->runtime;
73 unsigned char *cp;
74 int i, len, lens = 0, hwptr_done = subs->hwptr_done;
75 struct usX2Ydev *usX2Y = subs->usX2Y;
76
77 for (i = 0; i < nr_of_packs(); i++) {
78 cp = (unsigned char*)urb->transfer_buffer + urb->iso_frame_desc[i].offset;
79 if (urb->iso_frame_desc[i].status) { /* active? hmm, skip this */
80 snd_printk(KERN_ERR "active frame status %i. "
81 "Most propably some hardware problem.\n",
82 urb->iso_frame_desc[i].status);
83 return urb->iso_frame_desc[i].status;
84 }
85 len = urb->iso_frame_desc[i].actual_length / usX2Y->stride;
86 if (! len) {
87 snd_printd("0 == len ERROR!\n");
88 continue;
89 }
90
91 /* copy a data chunk */
92 if ((hwptr_done + len) > runtime->buffer_size) {
93 int cnt = runtime->buffer_size - hwptr_done;
94 int blen = cnt * usX2Y->stride;
95 memcpy(runtime->dma_area + hwptr_done * usX2Y->stride, cp, blen);
96 memcpy(runtime->dma_area, cp + blen, len * usX2Y->stride - blen);
97 } else {
98 memcpy(runtime->dma_area + hwptr_done * usX2Y->stride, cp,
99 len * usX2Y->stride);
100 }
101 lens += len;
102 if ((hwptr_done += len) >= runtime->buffer_size)
103 hwptr_done -= runtime->buffer_size;
104 }
105
106 subs->hwptr_done = hwptr_done;
107 subs->transfer_done += lens;
108 /* update the pointer, call callback if necessary */
109 if (subs->transfer_done >= runtime->period_size) {
110 subs->transfer_done -= runtime->period_size;
111 snd_pcm_period_elapsed(subs->pcm_substream);
112 }
113 return 0;
114 }
115 /*
116 * prepare urb for playback data pipe
117 *
118 * we copy the data directly from the pcm buffer.
119 * the current position to be copied is held in hwptr field.
120 * since a urb can handle only a single linear buffer, if the total
121 * transferred area overflows the buffer boundary, we cannot send
122 * it directly from the buffer. thus the data is once copied to
123 * a temporary buffer and urb points to that.
124 */
usX2Y_urb_play_prepare(struct snd_usX2Y_substream * subs,struct urb * cap_urb,struct urb * urb)125 static int usX2Y_urb_play_prepare(struct snd_usX2Y_substream *subs,
126 struct urb *cap_urb,
127 struct urb *urb)
128 {
129 int count, counts, pack;
130 struct usX2Ydev *usX2Y = subs->usX2Y;
131 struct snd_pcm_runtime *runtime = subs->pcm_substream->runtime;
132
133 count = 0;
134 for (pack = 0; pack < nr_of_packs(); pack++) {
135 /* calculate the size of a packet */
136 counts = cap_urb->iso_frame_desc[pack].actual_length / usX2Y->stride;
137 count += counts;
138 if (counts < 43 || counts > 50) {
139 snd_printk(KERN_ERR "should not be here with counts=%i\n", counts);
140 return -EPIPE;
141 }
142 /* set up descriptor */
143 urb->iso_frame_desc[pack].offset = pack ?
144 urb->iso_frame_desc[pack - 1].offset +
145 urb->iso_frame_desc[pack - 1].length :
146 0;
147 urb->iso_frame_desc[pack].length = cap_urb->iso_frame_desc[pack].actual_length;
148 }
149 if (atomic_read(&subs->state) >= state_PRERUNNING)
150 if (subs->hwptr + count > runtime->buffer_size) {
151 /* err, the transferred area goes over buffer boundary.
152 * copy the data to the temp buffer.
153 */
154 int len;
155 len = runtime->buffer_size - subs->hwptr;
156 urb->transfer_buffer = subs->tmpbuf;
157 memcpy(subs->tmpbuf, runtime->dma_area +
158 subs->hwptr * usX2Y->stride, len * usX2Y->stride);
159 memcpy(subs->tmpbuf + len * usX2Y->stride,
160 runtime->dma_area, (count - len) * usX2Y->stride);
161 subs->hwptr += count;
162 subs->hwptr -= runtime->buffer_size;
163 } else {
164 /* set the buffer pointer */
165 urb->transfer_buffer = runtime->dma_area + subs->hwptr * usX2Y->stride;
166 if ((subs->hwptr += count) >= runtime->buffer_size)
167 subs->hwptr -= runtime->buffer_size;
168 }
169 else
170 urb->transfer_buffer = subs->tmpbuf;
171 urb->transfer_buffer_length = count * usX2Y->stride;
172 return 0;
173 }
174
175 /*
176 * process after playback data complete
177 *
178 * update the current position and call callback if a period is processed.
179 */
usX2Y_urb_play_retire(struct snd_usX2Y_substream * subs,struct urb * urb)180 static void usX2Y_urb_play_retire(struct snd_usX2Y_substream *subs, struct urb *urb)
181 {
182 struct snd_pcm_runtime *runtime = subs->pcm_substream->runtime;
183 int len = urb->actual_length / subs->usX2Y->stride;
184
185 subs->transfer_done += len;
186 subs->hwptr_done += len;
187 if (subs->hwptr_done >= runtime->buffer_size)
188 subs->hwptr_done -= runtime->buffer_size;
189 if (subs->transfer_done >= runtime->period_size) {
190 subs->transfer_done -= runtime->period_size;
191 snd_pcm_period_elapsed(subs->pcm_substream);
192 }
193 }
194
usX2Y_urb_submit(struct snd_usX2Y_substream * subs,struct urb * urb,int frame)195 static int usX2Y_urb_submit(struct snd_usX2Y_substream *subs, struct urb *urb, int frame)
196 {
197 int err;
198 if (!urb)
199 return -ENODEV;
200 urb->start_frame = (frame + NRURBS * nr_of_packs()); // let hcd do rollover sanity checks
201 urb->hcpriv = NULL;
202 urb->dev = subs->usX2Y->chip.dev; /* we need to set this at each time */
203 if ((err = usb_submit_urb(urb, GFP_ATOMIC)) < 0) {
204 snd_printk(KERN_ERR "usb_submit_urb() returned %i\n", err);
205 return err;
206 }
207 return 0;
208 }
209
usX2Y_usbframe_complete(struct snd_usX2Y_substream * capsubs,struct snd_usX2Y_substream * playbacksubs,int frame)210 static inline int usX2Y_usbframe_complete(struct snd_usX2Y_substream *capsubs,
211 struct snd_usX2Y_substream *playbacksubs,
212 int frame)
213 {
214 int err, state;
215 struct urb *urb = playbacksubs->completed_urb;
216
217 state = atomic_read(&playbacksubs->state);
218 if (NULL != urb) {
219 if (state == state_RUNNING)
220 usX2Y_urb_play_retire(playbacksubs, urb);
221 else if (state >= state_PRERUNNING)
222 atomic_inc(&playbacksubs->state);
223 } else {
224 switch (state) {
225 case state_STARTING1:
226 urb = playbacksubs->urb[0];
227 atomic_inc(&playbacksubs->state);
228 break;
229 case state_STARTING2:
230 urb = playbacksubs->urb[1];
231 atomic_inc(&playbacksubs->state);
232 break;
233 }
234 }
235 if (urb) {
236 if ((err = usX2Y_urb_play_prepare(playbacksubs, capsubs->completed_urb, urb)) ||
237 (err = usX2Y_urb_submit(playbacksubs, urb, frame))) {
238 return err;
239 }
240 }
241
242 playbacksubs->completed_urb = NULL;
243
244 state = atomic_read(&capsubs->state);
245 if (state >= state_PREPARED) {
246 if (state == state_RUNNING) {
247 if ((err = usX2Y_urb_capt_retire(capsubs)))
248 return err;
249 } else if (state >= state_PRERUNNING)
250 atomic_inc(&capsubs->state);
251 if ((err = usX2Y_urb_submit(capsubs, capsubs->completed_urb, frame)))
252 return err;
253 }
254 capsubs->completed_urb = NULL;
255 return 0;
256 }
257
258
usX2Y_clients_stop(struct usX2Ydev * usX2Y)259 static void usX2Y_clients_stop(struct usX2Ydev *usX2Y)
260 {
261 int s, u;
262
263 for (s = 0; s < 4; s++) {
264 struct snd_usX2Y_substream *subs = usX2Y->subs[s];
265 if (subs) {
266 snd_printdd("%i %p state=%i\n", s, subs, atomic_read(&subs->state));
267 atomic_set(&subs->state, state_STOPPED);
268 }
269 }
270 for (s = 0; s < 4; s++) {
271 struct snd_usX2Y_substream *subs = usX2Y->subs[s];
272 if (subs) {
273 if (atomic_read(&subs->state) >= state_PRERUNNING) {
274 snd_pcm_stop(subs->pcm_substream, SNDRV_PCM_STATE_XRUN);
275 }
276 for (u = 0; u < NRURBS; u++) {
277 struct urb *urb = subs->urb[u];
278 if (NULL != urb)
279 snd_printdd("%i status=%i start_frame=%i\n",
280 u, urb->status, urb->start_frame);
281 }
282 }
283 }
284 usX2Y->prepare_subs = NULL;
285 wake_up(&usX2Y->prepare_wait_queue);
286 }
287
usX2Y_error_urb_status(struct usX2Ydev * usX2Y,struct snd_usX2Y_substream * subs,struct urb * urb)288 static void usX2Y_error_urb_status(struct usX2Ydev *usX2Y,
289 struct snd_usX2Y_substream *subs, struct urb *urb)
290 {
291 snd_printk(KERN_ERR "ep=%i stalled with status=%i\n", subs->endpoint, urb->status);
292 urb->status = 0;
293 usX2Y_clients_stop(usX2Y);
294 }
295
usX2Y_error_sequence(struct usX2Ydev * usX2Y,struct snd_usX2Y_substream * subs,struct urb * urb)296 static void usX2Y_error_sequence(struct usX2Ydev *usX2Y,
297 struct snd_usX2Y_substream *subs, struct urb *urb)
298 {
299 snd_printk(KERN_ERR "Sequence Error!(hcd_frame=%i ep=%i%s;wait=%i,frame=%i).\n"
300 KERN_ERR "Most propably some urb of usb-frame %i is still missing.\n"
301 KERN_ERR "Cause could be too long delays in usb-hcd interrupt handling.\n",
302 usb_get_current_frame_number(usX2Y->chip.dev),
303 subs->endpoint, usb_pipein(urb->pipe) ? "in" : "out",
304 usX2Y->wait_iso_frame, urb->start_frame, usX2Y->wait_iso_frame);
305 usX2Y_clients_stop(usX2Y);
306 }
307
i_usX2Y_urb_complete(struct urb * urb)308 static void i_usX2Y_urb_complete(struct urb *urb)
309 {
310 struct snd_usX2Y_substream *subs = urb->context;
311 struct usX2Ydev *usX2Y = subs->usX2Y;
312
313 if (unlikely(atomic_read(&subs->state) < state_PREPARED)) {
314 snd_printdd("hcd_frame=%i ep=%i%s status=%i start_frame=%i\n",
315 usb_get_current_frame_number(usX2Y->chip.dev),
316 subs->endpoint, usb_pipein(urb->pipe) ? "in" : "out",
317 urb->status, urb->start_frame);
318 return;
319 }
320 if (unlikely(urb->status)) {
321 usX2Y_error_urb_status(usX2Y, subs, urb);
322 return;
323 }
324 if (likely((urb->start_frame & 0xFFFF) == (usX2Y->wait_iso_frame & 0xFFFF)))
325 subs->completed_urb = urb;
326 else {
327 usX2Y_error_sequence(usX2Y, subs, urb);
328 return;
329 }
330 {
331 struct snd_usX2Y_substream *capsubs = usX2Y->subs[SNDRV_PCM_STREAM_CAPTURE],
332 *playbacksubs = usX2Y->subs[SNDRV_PCM_STREAM_PLAYBACK];
333 if (capsubs->completed_urb &&
334 atomic_read(&capsubs->state) >= state_PREPARED &&
335 (playbacksubs->completed_urb ||
336 atomic_read(&playbacksubs->state) < state_PREPARED)) {
337 if (!usX2Y_usbframe_complete(capsubs, playbacksubs, urb->start_frame))
338 usX2Y->wait_iso_frame += nr_of_packs();
339 else {
340 snd_printdd("\n");
341 usX2Y_clients_stop(usX2Y);
342 }
343 }
344 }
345 }
346
usX2Y_urbs_set_complete(struct usX2Ydev * usX2Y,void (* complete)(struct urb *))347 static void usX2Y_urbs_set_complete(struct usX2Ydev * usX2Y,
348 void (*complete)(struct urb *))
349 {
350 int s, u;
351 for (s = 0; s < 4; s++) {
352 struct snd_usX2Y_substream *subs = usX2Y->subs[s];
353 if (NULL != subs)
354 for (u = 0; u < NRURBS; u++) {
355 struct urb * urb = subs->urb[u];
356 if (NULL != urb)
357 urb->complete = complete;
358 }
359 }
360 }
361
usX2Y_subs_startup_finish(struct usX2Ydev * usX2Y)362 static void usX2Y_subs_startup_finish(struct usX2Ydev * usX2Y)
363 {
364 usX2Y_urbs_set_complete(usX2Y, i_usX2Y_urb_complete);
365 usX2Y->prepare_subs = NULL;
366 }
367
i_usX2Y_subs_startup(struct urb * urb)368 static void i_usX2Y_subs_startup(struct urb *urb)
369 {
370 struct snd_usX2Y_substream *subs = urb->context;
371 struct usX2Ydev *usX2Y = subs->usX2Y;
372 struct snd_usX2Y_substream *prepare_subs = usX2Y->prepare_subs;
373 if (NULL != prepare_subs)
374 if (urb->start_frame == prepare_subs->urb[0]->start_frame) {
375 usX2Y_subs_startup_finish(usX2Y);
376 atomic_inc(&prepare_subs->state);
377 wake_up(&usX2Y->prepare_wait_queue);
378 }
379
380 i_usX2Y_urb_complete(urb);
381 }
382
usX2Y_subs_prepare(struct snd_usX2Y_substream * subs)383 static void usX2Y_subs_prepare(struct snd_usX2Y_substream *subs)
384 {
385 snd_printdd("usX2Y_substream_prepare(%p) ep=%i urb0=%p urb1=%p\n",
386 subs, subs->endpoint, subs->urb[0], subs->urb[1]);
387 /* reset the pointer */
388 subs->hwptr = 0;
389 subs->hwptr_done = 0;
390 subs->transfer_done = 0;
391 }
392
393
usX2Y_urb_release(struct urb ** urb,int free_tb)394 static void usX2Y_urb_release(struct urb **urb, int free_tb)
395 {
396 if (*urb) {
397 usb_kill_urb(*urb);
398 if (free_tb)
399 kfree((*urb)->transfer_buffer);
400 usb_free_urb(*urb);
401 *urb = NULL;
402 }
403 }
404 /*
405 * release a substreams urbs
406 */
usX2Y_urbs_release(struct snd_usX2Y_substream * subs)407 static void usX2Y_urbs_release(struct snd_usX2Y_substream *subs)
408 {
409 int i;
410 snd_printdd("usX2Y_urbs_release() %i\n", subs->endpoint);
411 for (i = 0; i < NRURBS; i++)
412 usX2Y_urb_release(subs->urb + i,
413 subs != subs->usX2Y->subs[SNDRV_PCM_STREAM_PLAYBACK]);
414
415 kfree(subs->tmpbuf);
416 subs->tmpbuf = NULL;
417 }
418 /*
419 * initialize a substream's urbs
420 */
usX2Y_urbs_allocate(struct snd_usX2Y_substream * subs)421 static int usX2Y_urbs_allocate(struct snd_usX2Y_substream *subs)
422 {
423 int i;
424 unsigned int pipe;
425 int is_playback = subs == subs->usX2Y->subs[SNDRV_PCM_STREAM_PLAYBACK];
426 struct usb_device *dev = subs->usX2Y->chip.dev;
427
428 pipe = is_playback ? usb_sndisocpipe(dev, subs->endpoint) :
429 usb_rcvisocpipe(dev, subs->endpoint);
430 subs->maxpacksize = usb_maxpacket(dev, pipe, is_playback);
431 if (!subs->maxpacksize)
432 return -EINVAL;
433
434 if (is_playback && NULL == subs->tmpbuf) { /* allocate a temporary buffer for playback */
435 subs->tmpbuf = kcalloc(nr_of_packs(), subs->maxpacksize, GFP_KERNEL);
436 if (NULL == subs->tmpbuf) {
437 snd_printk(KERN_ERR "cannot malloc tmpbuf\n");
438 return -ENOMEM;
439 }
440 }
441 /* allocate and initialize data urbs */
442 for (i = 0; i < NRURBS; i++) {
443 struct urb **purb = subs->urb + i;
444 if (*purb) {
445 usb_kill_urb(*purb);
446 continue;
447 }
448 *purb = usb_alloc_urb(nr_of_packs(), GFP_KERNEL);
449 if (NULL == *purb) {
450 usX2Y_urbs_release(subs);
451 return -ENOMEM;
452 }
453 if (!is_playback && !(*purb)->transfer_buffer) {
454 /* allocate a capture buffer per urb */
455 (*purb)->transfer_buffer = kmalloc(subs->maxpacksize * nr_of_packs(), GFP_KERNEL);
456 if (NULL == (*purb)->transfer_buffer) {
457 usX2Y_urbs_release(subs);
458 return -ENOMEM;
459 }
460 }
461 (*purb)->dev = dev;
462 (*purb)->pipe = pipe;
463 (*purb)->number_of_packets = nr_of_packs();
464 (*purb)->context = subs;
465 (*purb)->interval = 1;
466 (*purb)->complete = i_usX2Y_subs_startup;
467 }
468 return 0;
469 }
470
usX2Y_subs_startup(struct snd_usX2Y_substream * subs)471 static void usX2Y_subs_startup(struct snd_usX2Y_substream *subs)
472 {
473 struct usX2Ydev *usX2Y = subs->usX2Y;
474 usX2Y->prepare_subs = subs;
475 subs->urb[0]->start_frame = -1;
476 wmb();
477 usX2Y_urbs_set_complete(usX2Y, i_usX2Y_subs_startup);
478 }
479
usX2Y_urbs_start(struct snd_usX2Y_substream * subs)480 static int usX2Y_urbs_start(struct snd_usX2Y_substream *subs)
481 {
482 int i, err;
483 struct usX2Ydev *usX2Y = subs->usX2Y;
484
485 if ((err = usX2Y_urbs_allocate(subs)) < 0)
486 return err;
487 subs->completed_urb = NULL;
488 for (i = 0; i < 4; i++) {
489 struct snd_usX2Y_substream *subs = usX2Y->subs[i];
490 if (subs != NULL && atomic_read(&subs->state) >= state_PREPARED)
491 goto start;
492 }
493
494 start:
495 usX2Y_subs_startup(subs);
496 for (i = 0; i < NRURBS; i++) {
497 struct urb *urb = subs->urb[i];
498 if (usb_pipein(urb->pipe)) {
499 unsigned long pack;
500 if (0 == i)
501 atomic_set(&subs->state, state_STARTING3);
502 urb->dev = usX2Y->chip.dev;
503 urb->transfer_flags = URB_ISO_ASAP;
504 for (pack = 0; pack < nr_of_packs(); pack++) {
505 urb->iso_frame_desc[pack].offset = subs->maxpacksize * pack;
506 urb->iso_frame_desc[pack].length = subs->maxpacksize;
507 }
508 urb->transfer_buffer_length = subs->maxpacksize * nr_of_packs();
509 if ((err = usb_submit_urb(urb, GFP_ATOMIC)) < 0) {
510 snd_printk (KERN_ERR "cannot submit datapipe for urb %d, err = %d\n", i, err);
511 err = -EPIPE;
512 goto cleanup;
513 } else
514 if (i == 0)
515 usX2Y->wait_iso_frame = urb->start_frame;
516 urb->transfer_flags = 0;
517 } else {
518 atomic_set(&subs->state, state_STARTING1);
519 break;
520 }
521 }
522 err = 0;
523 wait_event(usX2Y->prepare_wait_queue, NULL == usX2Y->prepare_subs);
524 if (atomic_read(&subs->state) != state_PREPARED)
525 err = -EPIPE;
526
527 cleanup:
528 if (err) {
529 usX2Y_subs_startup_finish(usX2Y);
530 usX2Y_clients_stop(usX2Y); // something is completely wroong > stop evrything
531 }
532 return err;
533 }
534
535 /*
536 * return the current pcm pointer. just return the hwptr_done value.
537 */
snd_usX2Y_pcm_pointer(struct snd_pcm_substream * substream)538 static snd_pcm_uframes_t snd_usX2Y_pcm_pointer(struct snd_pcm_substream *substream)
539 {
540 struct snd_usX2Y_substream *subs = substream->runtime->private_data;
541 return subs->hwptr_done;
542 }
543 /*
544 * start/stop substream
545 */
snd_usX2Y_pcm_trigger(struct snd_pcm_substream * substream,int cmd)546 static int snd_usX2Y_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
547 {
548 struct snd_usX2Y_substream *subs = substream->runtime->private_data;
549
550 switch (cmd) {
551 case SNDRV_PCM_TRIGGER_START:
552 snd_printdd("snd_usX2Y_pcm_trigger(START)\n");
553 if (atomic_read(&subs->state) == state_PREPARED &&
554 atomic_read(&subs->usX2Y->subs[SNDRV_PCM_STREAM_CAPTURE]->state) >= state_PREPARED) {
555 atomic_set(&subs->state, state_PRERUNNING);
556 } else {
557 snd_printdd("\n");
558 return -EPIPE;
559 }
560 break;
561 case SNDRV_PCM_TRIGGER_STOP:
562 snd_printdd("snd_usX2Y_pcm_trigger(STOP)\n");
563 if (atomic_read(&subs->state) >= state_PRERUNNING)
564 atomic_set(&subs->state, state_PREPARED);
565 break;
566 default:
567 return -EINVAL;
568 }
569 return 0;
570 }
571
572
573 /*
574 * allocate a buffer, setup samplerate
575 *
576 * so far we use a physically linear buffer although packetize transfer
577 * doesn't need a continuous area.
578 * if sg buffer is supported on the later version of alsa, we'll follow
579 * that.
580 */
581 static struct s_c2
582 {
583 char c1, c2;
584 }
585 SetRate44100[] =
586 {
587 { 0x14, 0x08}, // this line sets 44100, well actually a little less
588 { 0x18, 0x40}, // only tascam / frontier design knows the further lines .......
589 { 0x18, 0x42},
590 { 0x18, 0x45},
591 { 0x18, 0x46},
592 { 0x18, 0x48},
593 { 0x18, 0x4A},
594 { 0x18, 0x4C},
595 { 0x18, 0x4E},
596 { 0x18, 0x50},
597 { 0x18, 0x52},
598 { 0x18, 0x54},
599 { 0x18, 0x56},
600 { 0x18, 0x58},
601 { 0x18, 0x5A},
602 { 0x18, 0x5C},
603 { 0x18, 0x5E},
604 { 0x18, 0x60},
605 { 0x18, 0x62},
606 { 0x18, 0x64},
607 { 0x18, 0x66},
608 { 0x18, 0x68},
609 { 0x18, 0x6A},
610 { 0x18, 0x6C},
611 { 0x18, 0x6E},
612 { 0x18, 0x70},
613 { 0x18, 0x72},
614 { 0x18, 0x74},
615 { 0x18, 0x76},
616 { 0x18, 0x78},
617 { 0x18, 0x7A},
618 { 0x18, 0x7C},
619 { 0x18, 0x7E}
620 };
621 static struct s_c2 SetRate48000[] =
622 {
623 { 0x14, 0x09}, // this line sets 48000, well actually a little less
624 { 0x18, 0x40}, // only tascam / frontier design knows the further lines .......
625 { 0x18, 0x42},
626 { 0x18, 0x45},
627 { 0x18, 0x46},
628 { 0x18, 0x48},
629 { 0x18, 0x4A},
630 { 0x18, 0x4C},
631 { 0x18, 0x4E},
632 { 0x18, 0x50},
633 { 0x18, 0x52},
634 { 0x18, 0x54},
635 { 0x18, 0x56},
636 { 0x18, 0x58},
637 { 0x18, 0x5A},
638 { 0x18, 0x5C},
639 { 0x18, 0x5E},
640 { 0x18, 0x60},
641 { 0x18, 0x62},
642 { 0x18, 0x64},
643 { 0x18, 0x66},
644 { 0x18, 0x68},
645 { 0x18, 0x6A},
646 { 0x18, 0x6C},
647 { 0x18, 0x6E},
648 { 0x18, 0x70},
649 { 0x18, 0x73},
650 { 0x18, 0x74},
651 { 0x18, 0x76},
652 { 0x18, 0x78},
653 { 0x18, 0x7A},
654 { 0x18, 0x7C},
655 { 0x18, 0x7E}
656 };
657 #define NOOF_SETRATE_URBS ARRAY_SIZE(SetRate48000)
658
i_usX2Y_04Int(struct urb * urb)659 static void i_usX2Y_04Int(struct urb *urb)
660 {
661 struct usX2Ydev *usX2Y = urb->context;
662
663 if (urb->status)
664 snd_printk(KERN_ERR "snd_usX2Y_04Int() urb->status=%i\n", urb->status);
665 if (0 == --usX2Y->US04->len)
666 wake_up(&usX2Y->In04WaitQueue);
667 }
668
usX2Y_rate_set(struct usX2Ydev * usX2Y,int rate)669 static int usX2Y_rate_set(struct usX2Ydev *usX2Y, int rate)
670 {
671 int err = 0, i;
672 struct snd_usX2Y_urbSeq *us = NULL;
673 int *usbdata = NULL;
674 struct s_c2 *ra = rate == 48000 ? SetRate48000 : SetRate44100;
675
676 if (usX2Y->rate != rate) {
677 us = kzalloc(sizeof(*us) + sizeof(struct urb*) * NOOF_SETRATE_URBS, GFP_KERNEL);
678 if (NULL == us) {
679 err = -ENOMEM;
680 goto cleanup;
681 }
682 usbdata = kmalloc(sizeof(int) * NOOF_SETRATE_URBS, GFP_KERNEL);
683 if (NULL == usbdata) {
684 err = -ENOMEM;
685 goto cleanup;
686 }
687 for (i = 0; i < NOOF_SETRATE_URBS; ++i) {
688 if (NULL == (us->urb[i] = usb_alloc_urb(0, GFP_KERNEL))) {
689 err = -ENOMEM;
690 goto cleanup;
691 }
692 ((char*)(usbdata + i))[0] = ra[i].c1;
693 ((char*)(usbdata + i))[1] = ra[i].c2;
694 usb_fill_bulk_urb(us->urb[i], usX2Y->chip.dev, usb_sndbulkpipe(usX2Y->chip.dev, 4),
695 usbdata + i, 2, i_usX2Y_04Int, usX2Y);
696 #ifdef OLD_USB
697 us->urb[i]->transfer_flags = USB_QUEUE_BULK;
698 #endif
699 }
700 us->submitted = 0;
701 us->len = NOOF_SETRATE_URBS;
702 usX2Y->US04 = us;
703 wait_event_timeout(usX2Y->In04WaitQueue, 0 == us->len, HZ);
704 usX2Y->US04 = NULL;
705 if (us->len)
706 err = -ENODEV;
707 cleanup:
708 if (us) {
709 us->submitted = 2*NOOF_SETRATE_URBS;
710 for (i = 0; i < NOOF_SETRATE_URBS; ++i) {
711 struct urb *urb = us->urb[i];
712 if (urb->status) {
713 if (!err)
714 err = -ENODEV;
715 usb_kill_urb(urb);
716 }
717 usb_free_urb(urb);
718 }
719 usX2Y->US04 = NULL;
720 kfree(usbdata);
721 kfree(us);
722 if (!err)
723 usX2Y->rate = rate;
724 }
725 }
726
727 return err;
728 }
729
730
usX2Y_format_set(struct usX2Ydev * usX2Y,snd_pcm_format_t format)731 static int usX2Y_format_set(struct usX2Ydev *usX2Y, snd_pcm_format_t format)
732 {
733 int alternate, err;
734 struct list_head* p;
735 if (format == SNDRV_PCM_FORMAT_S24_3LE) {
736 alternate = 2;
737 usX2Y->stride = 6;
738 } else {
739 alternate = 1;
740 usX2Y->stride = 4;
741 }
742 list_for_each(p, &usX2Y->chip.midi_list) {
743 snd_usbmidi_input_stop(p);
744 }
745 usb_kill_urb(usX2Y->In04urb);
746 if ((err = usb_set_interface(usX2Y->chip.dev, 0, alternate))) {
747 snd_printk(KERN_ERR "usb_set_interface error \n");
748 return err;
749 }
750 usX2Y->In04urb->dev = usX2Y->chip.dev;
751 err = usb_submit_urb(usX2Y->In04urb, GFP_KERNEL);
752 list_for_each(p, &usX2Y->chip.midi_list) {
753 snd_usbmidi_input_start(p);
754 }
755 usX2Y->format = format;
756 usX2Y->rate = 0;
757 return err;
758 }
759
760
snd_usX2Y_pcm_hw_params(struct snd_pcm_substream * substream,struct snd_pcm_hw_params * hw_params)761 static int snd_usX2Y_pcm_hw_params(struct snd_pcm_substream *substream,
762 struct snd_pcm_hw_params *hw_params)
763 {
764 int err = 0;
765 unsigned int rate = params_rate(hw_params);
766 snd_pcm_format_t format = params_format(hw_params);
767 struct snd_card *card = substream->pstr->pcm->card;
768 struct list_head *list;
769
770 snd_printdd("snd_usX2Y_hw_params(%p, %p)\n", substream, hw_params);
771 // all pcm substreams off one usX2Y have to operate at the same rate & format
772 list_for_each(list, &card->devices) {
773 struct snd_device *dev;
774 struct snd_pcm *pcm;
775 int s;
776 dev = snd_device(list);
777 if (dev->type != SNDRV_DEV_PCM)
778 continue;
779 pcm = dev->device_data;
780 for (s = 0; s < 2; ++s) {
781 struct snd_pcm_substream *test_substream;
782 test_substream = pcm->streams[s].substream;
783 if (test_substream && test_substream != substream &&
784 test_substream->runtime &&
785 ((test_substream->runtime->format &&
786 test_substream->runtime->format != format) ||
787 (test_substream->runtime->rate &&
788 test_substream->runtime->rate != rate)))
789 return -EINVAL;
790 }
791 }
792 if (0 > (err = snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(hw_params)))) {
793 snd_printk(KERN_ERR "snd_pcm_lib_malloc_pages(%p, %i) returned %i\n",
794 substream, params_buffer_bytes(hw_params), err);
795 return err;
796 }
797 return 0;
798 }
799
800 /*
801 * free the buffer
802 */
snd_usX2Y_pcm_hw_free(struct snd_pcm_substream * substream)803 static int snd_usX2Y_pcm_hw_free(struct snd_pcm_substream *substream)
804 {
805 struct snd_pcm_runtime *runtime = substream->runtime;
806 struct snd_usX2Y_substream *subs = runtime->private_data;
807 mutex_lock(&subs->usX2Y->prepare_mutex);
808 snd_printdd("snd_usX2Y_hw_free(%p)\n", substream);
809
810 if (SNDRV_PCM_STREAM_PLAYBACK == substream->stream) {
811 struct snd_usX2Y_substream *cap_subs = subs->usX2Y->subs[SNDRV_PCM_STREAM_CAPTURE];
812 atomic_set(&subs->state, state_STOPPED);
813 usX2Y_urbs_release(subs);
814 if (!cap_subs->pcm_substream ||
815 !cap_subs->pcm_substream->runtime ||
816 !cap_subs->pcm_substream->runtime->status ||
817 cap_subs->pcm_substream->runtime->status->state < SNDRV_PCM_STATE_PREPARED) {
818 atomic_set(&cap_subs->state, state_STOPPED);
819 usX2Y_urbs_release(cap_subs);
820 }
821 } else {
822 struct snd_usX2Y_substream *playback_subs = subs->usX2Y->subs[SNDRV_PCM_STREAM_PLAYBACK];
823 if (atomic_read(&playback_subs->state) < state_PREPARED) {
824 atomic_set(&subs->state, state_STOPPED);
825 usX2Y_urbs_release(subs);
826 }
827 }
828 mutex_unlock(&subs->usX2Y->prepare_mutex);
829 return snd_pcm_lib_free_pages(substream);
830 }
831 /*
832 * prepare callback
833 *
834 * set format and initialize urbs
835 */
snd_usX2Y_pcm_prepare(struct snd_pcm_substream * substream)836 static int snd_usX2Y_pcm_prepare(struct snd_pcm_substream *substream)
837 {
838 struct snd_pcm_runtime *runtime = substream->runtime;
839 struct snd_usX2Y_substream *subs = runtime->private_data;
840 struct usX2Ydev *usX2Y = subs->usX2Y;
841 struct snd_usX2Y_substream *capsubs = subs->usX2Y->subs[SNDRV_PCM_STREAM_CAPTURE];
842 int err = 0;
843 snd_printdd("snd_usX2Y_pcm_prepare(%p)\n", substream);
844
845 mutex_lock(&usX2Y->prepare_mutex);
846 usX2Y_subs_prepare(subs);
847 // Start hardware streams
848 // SyncStream first....
849 if (atomic_read(&capsubs->state) < state_PREPARED) {
850 if (usX2Y->format != runtime->format)
851 if ((err = usX2Y_format_set(usX2Y, runtime->format)) < 0)
852 goto up_prepare_mutex;
853 if (usX2Y->rate != runtime->rate)
854 if ((err = usX2Y_rate_set(usX2Y, runtime->rate)) < 0)
855 goto up_prepare_mutex;
856 snd_printdd("starting capture pipe for %s\n", subs == capsubs ? "self" : "playpipe");
857 if (0 > (err = usX2Y_urbs_start(capsubs)))
858 goto up_prepare_mutex;
859 }
860
861 if (subs != capsubs && atomic_read(&subs->state) < state_PREPARED)
862 err = usX2Y_urbs_start(subs);
863
864 up_prepare_mutex:
865 mutex_unlock(&usX2Y->prepare_mutex);
866 return err;
867 }
868
869 static struct snd_pcm_hardware snd_usX2Y_2c =
870 {
871 .info = (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
872 SNDRV_PCM_INFO_BLOCK_TRANSFER |
873 SNDRV_PCM_INFO_MMAP_VALID),
874 .formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_3LE,
875 .rates = SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000,
876 .rate_min = 44100,
877 .rate_max = 48000,
878 .channels_min = 2,
879 .channels_max = 2,
880 .buffer_bytes_max = (2*128*1024),
881 .period_bytes_min = 64,
882 .period_bytes_max = (128*1024),
883 .periods_min = 2,
884 .periods_max = 1024,
885 .fifo_size = 0
886 };
887
888
889
snd_usX2Y_pcm_open(struct snd_pcm_substream * substream)890 static int snd_usX2Y_pcm_open(struct snd_pcm_substream *substream)
891 {
892 struct snd_usX2Y_substream *subs = ((struct snd_usX2Y_substream **)
893 snd_pcm_substream_chip(substream))[substream->stream];
894 struct snd_pcm_runtime *runtime = substream->runtime;
895
896 if (subs->usX2Y->chip_status & USX2Y_STAT_CHIP_MMAP_PCM_URBS)
897 return -EBUSY;
898
899 runtime->hw = snd_usX2Y_2c;
900 runtime->private_data = subs;
901 subs->pcm_substream = substream;
902 snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_TIME, 1000, 200000);
903 return 0;
904 }
905
906
907
snd_usX2Y_pcm_close(struct snd_pcm_substream * substream)908 static int snd_usX2Y_pcm_close(struct snd_pcm_substream *substream)
909 {
910 struct snd_pcm_runtime *runtime = substream->runtime;
911 struct snd_usX2Y_substream *subs = runtime->private_data;
912
913 subs->pcm_substream = NULL;
914
915 return 0;
916 }
917
918
919 static struct snd_pcm_ops snd_usX2Y_pcm_ops =
920 {
921 .open = snd_usX2Y_pcm_open,
922 .close = snd_usX2Y_pcm_close,
923 .ioctl = snd_pcm_lib_ioctl,
924 .hw_params = snd_usX2Y_pcm_hw_params,
925 .hw_free = snd_usX2Y_pcm_hw_free,
926 .prepare = snd_usX2Y_pcm_prepare,
927 .trigger = snd_usX2Y_pcm_trigger,
928 .pointer = snd_usX2Y_pcm_pointer,
929 };
930
931
932 /*
933 * free a usb stream instance
934 */
usX2Y_audio_stream_free(struct snd_usX2Y_substream ** usX2Y_substream)935 static void usX2Y_audio_stream_free(struct snd_usX2Y_substream **usX2Y_substream)
936 {
937 kfree(usX2Y_substream[SNDRV_PCM_STREAM_PLAYBACK]);
938 usX2Y_substream[SNDRV_PCM_STREAM_PLAYBACK] = NULL;
939
940 kfree(usX2Y_substream[SNDRV_PCM_STREAM_CAPTURE]);
941 usX2Y_substream[SNDRV_PCM_STREAM_CAPTURE] = NULL;
942 }
943
snd_usX2Y_pcm_private_free(struct snd_pcm * pcm)944 static void snd_usX2Y_pcm_private_free(struct snd_pcm *pcm)
945 {
946 struct snd_usX2Y_substream **usX2Y_stream = pcm->private_data;
947 if (usX2Y_stream)
948 usX2Y_audio_stream_free(usX2Y_stream);
949 }
950
usX2Y_audio_stream_new(struct snd_card * card,int playback_endpoint,int capture_endpoint)951 static int usX2Y_audio_stream_new(struct snd_card *card, int playback_endpoint, int capture_endpoint)
952 {
953 struct snd_pcm *pcm;
954 int err, i;
955 struct snd_usX2Y_substream **usX2Y_substream =
956 usX2Y(card)->subs + 2 * usX2Y(card)->chip.pcm_devs;
957
958 for (i = playback_endpoint ? SNDRV_PCM_STREAM_PLAYBACK : SNDRV_PCM_STREAM_CAPTURE;
959 i <= SNDRV_PCM_STREAM_CAPTURE; ++i) {
960 usX2Y_substream[i] = kzalloc(sizeof(struct snd_usX2Y_substream), GFP_KERNEL);
961 if (NULL == usX2Y_substream[i]) {
962 snd_printk(KERN_ERR "cannot malloc\n");
963 return -ENOMEM;
964 }
965 usX2Y_substream[i]->usX2Y = usX2Y(card);
966 }
967
968 if (playback_endpoint)
969 usX2Y_substream[SNDRV_PCM_STREAM_PLAYBACK]->endpoint = playback_endpoint;
970 usX2Y_substream[SNDRV_PCM_STREAM_CAPTURE]->endpoint = capture_endpoint;
971
972 err = snd_pcm_new(card, NAME_ALLCAPS" Audio", usX2Y(card)->chip.pcm_devs,
973 playback_endpoint ? 1 : 0, 1,
974 &pcm);
975 if (err < 0) {
976 usX2Y_audio_stream_free(usX2Y_substream);
977 return err;
978 }
979
980 if (playback_endpoint)
981 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_usX2Y_pcm_ops);
982 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_usX2Y_pcm_ops);
983
984 pcm->private_data = usX2Y_substream;
985 pcm->private_free = snd_usX2Y_pcm_private_free;
986 pcm->info_flags = 0;
987
988 sprintf(pcm->name, NAME_ALLCAPS" Audio #%d", usX2Y(card)->chip.pcm_devs);
989
990 if ((playback_endpoint &&
991 0 > (err = snd_pcm_lib_preallocate_pages(pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream,
992 SNDRV_DMA_TYPE_CONTINUOUS,
993 snd_dma_continuous_data(GFP_KERNEL),
994 64*1024, 128*1024))) ||
995 0 > (err = snd_pcm_lib_preallocate_pages(pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream,
996 SNDRV_DMA_TYPE_CONTINUOUS,
997 snd_dma_continuous_data(GFP_KERNEL),
998 64*1024, 128*1024))) {
999 snd_usX2Y_pcm_private_free(pcm);
1000 return err;
1001 }
1002 usX2Y(card)->chip.pcm_devs++;
1003
1004 return 0;
1005 }
1006
1007 /*
1008 * create a chip instance and set its names.
1009 */
usX2Y_audio_create(struct snd_card * card)1010 int usX2Y_audio_create(struct snd_card *card)
1011 {
1012 int err = 0;
1013
1014 INIT_LIST_HEAD(&usX2Y(card)->chip.pcm_list);
1015
1016 if (0 > (err = usX2Y_audio_stream_new(card, 0xA, 0x8)))
1017 return err;
1018 if (le16_to_cpu(usX2Y(card)->chip.dev->descriptor.idProduct) == USB_ID_US428)
1019 if (0 > (err = usX2Y_audio_stream_new(card, 0, 0xA)))
1020 return err;
1021 if (le16_to_cpu(usX2Y(card)->chip.dev->descriptor.idProduct) != USB_ID_US122)
1022 err = usX2Y_rate_set(usX2Y(card), 44100); // Lets us428 recognize output-volume settings, disturbs us122.
1023 return err;
1024 }
1025