1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * US-X2Y AUDIO
4 * Copyright (c) 2002-2004 by Karsten Wiese
5 *
6 * based on
7 *
8 * (Tentative) USB Audio Driver for ALSA
9 *
10 * Main and PCM part
11 *
12 * Copyright (c) 2002 by Takashi Iwai <tiwai@suse.de>
13 *
14 * Many codes borrowed from audio.c by
15 * Alan Cox (alan@lxorguk.ukuu.org.uk)
16 * Thomas Sailer (sailer@ife.ee.ethz.ch)
17 */
18
19
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>
28 #include "usx2y.h"
29 #include "usbusx2y.h"
30
31 /* 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"
36 *
37 * 1, 2 and 4 work out of the box on ohci, if I recall correctly.
38 * Bigger is safer operation, smaller gives lower latencies.
39 */
40 #define USX2Y_NRPACKS 4
41
42 /* If your system works ok with this module's parameter
43 * nrpacks set to 1, you might as well comment
44 * this define out, and thereby produce smaller, faster code.
45 * You'd also set USX2Y_NRPACKS to 1 then.
46 */
47 #define USX2Y_NRPACKS_VARIABLE 1
48
49 #ifdef USX2Y_NRPACKS_VARIABLE
50 static int nrpacks = USX2Y_NRPACKS; /* number of packets per urb */
51 #define nr_of_packs() nrpacks
52 module_param(nrpacks, int, 0444);
53 MODULE_PARM_DESC(nrpacks, "Number of packets per URB.");
54 #else
55 #define nr_of_packs() USX2Y_NRPACKS
56 #endif
57
usx2y_urb_capt_retire(struct snd_usx2y_substream * subs)58 static int usx2y_urb_capt_retire(struct snd_usx2y_substream *subs)
59 {
60 struct urb *urb = subs->completed_urb;
61 struct snd_pcm_runtime *runtime = subs->pcm_substream->runtime;
62 unsigned char *cp;
63 int i, len, lens = 0, hwptr_done = subs->hwptr_done;
64 int cnt, blen;
65 struct usx2ydev *usx2y = subs->usx2y;
66
67 for (i = 0; i < nr_of_packs(); i++) {
68 cp = (unsigned char *)urb->transfer_buffer + urb->iso_frame_desc[i].offset;
69 if (urb->iso_frame_desc[i].status) { /* active? hmm, skip this */
70 snd_printk(KERN_ERR
71 "active frame status %i. Most probably some hardware problem.\n",
72 urb->iso_frame_desc[i].status);
73 return urb->iso_frame_desc[i].status;
74 }
75 len = urb->iso_frame_desc[i].actual_length / usx2y->stride;
76 if (!len) {
77 snd_printd("0 == len ERROR!\n");
78 continue;
79 }
80
81 /* copy a data chunk */
82 if ((hwptr_done + len) > runtime->buffer_size) {
83 cnt = runtime->buffer_size - hwptr_done;
84 blen = cnt * usx2y->stride;
85 memcpy(runtime->dma_area + hwptr_done * usx2y->stride, cp, blen);
86 memcpy(runtime->dma_area, cp + blen, len * usx2y->stride - blen);
87 } else {
88 memcpy(runtime->dma_area + hwptr_done * usx2y->stride, cp,
89 len * usx2y->stride);
90 }
91 lens += len;
92 hwptr_done += len;
93 if (hwptr_done >= runtime->buffer_size)
94 hwptr_done -= runtime->buffer_size;
95 }
96
97 subs->hwptr_done = hwptr_done;
98 subs->transfer_done += lens;
99 /* update the pointer, call callback if necessary */
100 if (subs->transfer_done >= runtime->period_size) {
101 subs->transfer_done -= runtime->period_size;
102 snd_pcm_period_elapsed(subs->pcm_substream);
103 }
104 return 0;
105 }
106
107 /*
108 * prepare urb for playback data pipe
109 *
110 * we copy the data directly from the pcm buffer.
111 * the current position to be copied is held in hwptr field.
112 * since a urb can handle only a single linear buffer, if the total
113 * transferred area overflows the buffer boundary, we cannot send
114 * it directly from the buffer. thus the data is once copied to
115 * a temporary buffer and urb points to that.
116 */
usx2y_urb_play_prepare(struct snd_usx2y_substream * subs,struct urb * cap_urb,struct urb * urb)117 static int usx2y_urb_play_prepare(struct snd_usx2y_substream *subs,
118 struct urb *cap_urb,
119 struct urb *urb)
120 {
121 struct usx2ydev *usx2y = subs->usx2y;
122 struct snd_pcm_runtime *runtime = subs->pcm_substream->runtime;
123 int count, counts, pack, len;
124
125 count = 0;
126 for (pack = 0; pack < nr_of_packs(); pack++) {
127 /* calculate the size of a packet */
128 counts = cap_urb->iso_frame_desc[pack].actual_length / usx2y->stride;
129 count += counts;
130 if (counts < 43 || counts > 50) {
131 snd_printk(KERN_ERR "should not be here with counts=%i\n", counts);
132 return -EPIPE;
133 }
134 /* set up descriptor */
135 urb->iso_frame_desc[pack].offset = pack ?
136 urb->iso_frame_desc[pack - 1].offset +
137 urb->iso_frame_desc[pack - 1].length :
138 0;
139 urb->iso_frame_desc[pack].length = cap_urb->iso_frame_desc[pack].actual_length;
140 }
141 if (atomic_read(&subs->state) >= STATE_PRERUNNING) {
142 if (subs->hwptr + count > runtime->buffer_size) {
143 /* err, the transferred area goes over buffer boundary.
144 * copy the data to the temp buffer.
145 */
146 len = runtime->buffer_size - subs->hwptr;
147 urb->transfer_buffer = subs->tmpbuf;
148 memcpy(subs->tmpbuf, runtime->dma_area +
149 subs->hwptr * usx2y->stride, len * usx2y->stride);
150 memcpy(subs->tmpbuf + len * usx2y->stride,
151 runtime->dma_area, (count - len) * usx2y->stride);
152 subs->hwptr += count;
153 subs->hwptr -= runtime->buffer_size;
154 } else {
155 /* set the buffer pointer */
156 urb->transfer_buffer = runtime->dma_area + subs->hwptr * usx2y->stride;
157 subs->hwptr += count;
158 if (subs->hwptr >= runtime->buffer_size)
159 subs->hwptr -= runtime->buffer_size;
160 }
161 } else {
162 urb->transfer_buffer = subs->tmpbuf;
163 }
164 urb->transfer_buffer_length = count * usx2y->stride;
165 return 0;
166 }
167
168 /*
169 * process after playback data complete
170 *
171 * update the current position and call callback if a period is processed.
172 */
usx2y_urb_play_retire(struct snd_usx2y_substream * subs,struct urb * urb)173 static void usx2y_urb_play_retire(struct snd_usx2y_substream *subs, struct urb *urb)
174 {
175 struct snd_pcm_runtime *runtime = subs->pcm_substream->runtime;
176 int len = urb->actual_length / subs->usx2y->stride;
177
178 subs->transfer_done += len;
179 subs->hwptr_done += len;
180 if (subs->hwptr_done >= runtime->buffer_size)
181 subs->hwptr_done -= runtime->buffer_size;
182 if (subs->transfer_done >= runtime->period_size) {
183 subs->transfer_done -= runtime->period_size;
184 snd_pcm_period_elapsed(subs->pcm_substream);
185 }
186 }
187
usx2y_urb_submit(struct snd_usx2y_substream * subs,struct urb * urb,int frame)188 static int usx2y_urb_submit(struct snd_usx2y_substream *subs, struct urb *urb, int frame)
189 {
190 int err;
191
192 if (!urb)
193 return -ENODEV;
194 urb->start_frame = frame + NRURBS * nr_of_packs(); // let hcd do rollover sanity checks
195 urb->hcpriv = NULL;
196 urb->dev = subs->usx2y->dev; /* we need to set this at each time */
197 err = usb_submit_urb(urb, GFP_ATOMIC);
198 if (err < 0) {
199 snd_printk(KERN_ERR "usb_submit_urb() returned %i\n", err);
200 return err;
201 }
202 return 0;
203 }
204
usx2y_usbframe_complete(struct snd_usx2y_substream * capsubs,struct snd_usx2y_substream * playbacksubs,int frame)205 static int usx2y_usbframe_complete(struct snd_usx2y_substream *capsubs,
206 struct snd_usx2y_substream *playbacksubs,
207 int frame)
208 {
209 int err, state;
210 struct urb *urb = playbacksubs->completed_urb;
211
212 state = atomic_read(&playbacksubs->state);
213 if (urb) {
214 if (state == STATE_RUNNING)
215 usx2y_urb_play_retire(playbacksubs, urb);
216 else if (state >= STATE_PRERUNNING)
217 atomic_inc(&playbacksubs->state);
218 } else {
219 switch (state) {
220 case STATE_STARTING1:
221 urb = playbacksubs->urb[0];
222 atomic_inc(&playbacksubs->state);
223 break;
224 case STATE_STARTING2:
225 urb = playbacksubs->urb[1];
226 atomic_inc(&playbacksubs->state);
227 break;
228 }
229 }
230 if (urb) {
231 err = usx2y_urb_play_prepare(playbacksubs, capsubs->completed_urb, urb);
232 if (err)
233 return err;
234 err = usx2y_urb_submit(playbacksubs, urb, frame);
235 if (err)
236 return err;
237 }
238
239 playbacksubs->completed_urb = NULL;
240
241 state = atomic_read(&capsubs->state);
242 if (state >= STATE_PREPARED) {
243 if (state == STATE_RUNNING) {
244 err = usx2y_urb_capt_retire(capsubs);
245 if (err)
246 return err;
247 } else if (state >= STATE_PRERUNNING) {
248 atomic_inc(&capsubs->state);
249 }
250 err = usx2y_urb_submit(capsubs, capsubs->completed_urb, frame);
251 if (err)
252 return err;
253 }
254 capsubs->completed_urb = NULL;
255 return 0;
256 }
257
usx2y_clients_stop(struct usx2ydev * usx2y)258 static void usx2y_clients_stop(struct usx2ydev *usx2y)
259 {
260 struct snd_usx2y_substream *subs;
261 struct urb *urb;
262 int s, u;
263
264 for (s = 0; s < 4; s++) {
265 subs = usx2y->subs[s];
266 if (subs) {
267 snd_printdd("%i %p state=%i\n", s, subs, atomic_read(&subs->state));
268 atomic_set(&subs->state, STATE_STOPPED);
269 }
270 }
271 for (s = 0; s < 4; s++) {
272 subs = usx2y->subs[s];
273 if (subs) {
274 if (atomic_read(&subs->state) >= STATE_PRERUNNING)
275 snd_pcm_stop_xrun(subs->pcm_substream);
276 for (u = 0; u < NRURBS; u++) {
277 urb = subs->urb[u];
278 if (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
i_usx2y_urb_complete(struct urb * urb)296 static void i_usx2y_urb_complete(struct urb *urb)
297 {
298 struct snd_usx2y_substream *subs = urb->context;
299 struct usx2ydev *usx2y = subs->usx2y;
300 struct snd_usx2y_substream *capsubs, *playbacksubs;
301
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);
307 return;
308 }
309 if (unlikely(urb->status)) {
310 usx2y_error_urb_status(usx2y, subs, urb);
311 return;
312 }
313
314 subs->completed_urb = urb;
315
316 capsubs = usx2y->subs[SNDRV_PCM_STREAM_CAPTURE];
317 playbacksubs = usx2y->subs[SNDRV_PCM_STREAM_PLAYBACK];
318
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();
325 } else {
326 snd_printdd("\n");
327 usx2y_clients_stop(usx2y);
328 }
329 }
330 }
331
usx2y_urbs_set_complete(struct usx2ydev * usx2y,void (* complete)(struct urb *))332 static void usx2y_urbs_set_complete(struct usx2ydev *usx2y,
333 void (*complete)(struct urb *))
334 {
335 struct snd_usx2y_substream *subs;
336 struct urb *urb;
337 int s, u;
338
339 for (s = 0; s < 4; s++) {
340 subs = usx2y->subs[s];
341 if (subs) {
342 for (u = 0; u < NRURBS; u++) {
343 urb = subs->urb[u];
344 if (urb)
345 urb->complete = complete;
346 }
347 }
348 }
349 }
350
usx2y_subs_startup_finish(struct usx2ydev * usx2y)351 static void usx2y_subs_startup_finish(struct usx2ydev *usx2y)
352 {
353 usx2y_urbs_set_complete(usx2y, i_usx2y_urb_complete);
354 usx2y->prepare_subs = NULL;
355 }
356
i_usx2y_subs_startup(struct urb * urb)357 static void i_usx2y_subs_startup(struct urb *urb)
358 {
359 struct snd_usx2y_substream *subs = urb->context;
360 struct usx2ydev *usx2y = subs->usx2y;
361 struct snd_usx2y_substream *prepare_subs = usx2y->prepare_subs;
362
363 if (prepare_subs) {
364 if (urb->start_frame == prepare_subs->urb[0]->start_frame) {
365 usx2y_subs_startup_finish(usx2y);
366 atomic_inc(&prepare_subs->state);
367 wake_up(&usx2y->prepare_wait_queue);
368 }
369 }
370
371 i_usx2y_urb_complete(urb);
372 }
373
usx2y_subs_prepare(struct snd_usx2y_substream * subs)374 static void usx2y_subs_prepare(struct snd_usx2y_substream *subs)
375 {
376 snd_printdd("usx2y_substream_prepare(%p) ep=%i urb0=%p urb1=%p\n",
377 subs, subs->endpoint, subs->urb[0], subs->urb[1]);
378 /* reset the pointer */
379 subs->hwptr = 0;
380 subs->hwptr_done = 0;
381 subs->transfer_done = 0;
382 }
383
usx2y_urb_release(struct urb ** urb,int free_tb)384 static void usx2y_urb_release(struct urb **urb, int free_tb)
385 {
386 if (*urb) {
387 usb_kill_urb(*urb);
388 if (free_tb)
389 kfree((*urb)->transfer_buffer);
390 usb_free_urb(*urb);
391 *urb = NULL;
392 }
393 }
394
395 /*
396 * release a substreams urbs
397 */
usx2y_urbs_release(struct snd_usx2y_substream * subs)398 static void usx2y_urbs_release(struct snd_usx2y_substream *subs)
399 {
400 int i;
401
402 snd_printdd("%s %i\n", __func__, subs->endpoint);
403 for (i = 0; i < NRURBS; i++)
404 usx2y_urb_release(subs->urb + i,
405 subs != subs->usx2y->subs[SNDRV_PCM_STREAM_PLAYBACK]);
406
407 kfree(subs->tmpbuf);
408 subs->tmpbuf = NULL;
409 }
410
411 /*
412 * initialize a substream's urbs
413 */
usx2y_urbs_allocate(struct snd_usx2y_substream * subs)414 static int usx2y_urbs_allocate(struct snd_usx2y_substream *subs)
415 {
416 int i;
417 unsigned int pipe;
418 int is_playback = subs == subs->usx2y->subs[SNDRV_PCM_STREAM_PLAYBACK];
419 struct usb_device *dev = subs->usx2y->dev;
420 struct urb **purb;
421
422 pipe = is_playback ? usb_sndisocpipe(dev, subs->endpoint) :
423 usb_rcvisocpipe(dev, subs->endpoint);
424 subs->maxpacksize = usb_maxpacket(dev, pipe, is_playback);
425 if (!subs->maxpacksize)
426 return -EINVAL;
427
428 if (is_playback && !subs->tmpbuf) { /* allocate a temporary buffer for playback */
429 subs->tmpbuf = kcalloc(nr_of_packs(), subs->maxpacksize, GFP_KERNEL);
430 if (!subs->tmpbuf)
431 return -ENOMEM;
432 }
433 /* allocate and initialize data urbs */
434 for (i = 0; i < NRURBS; i++) {
435 purb = subs->urb + i;
436 if (*purb) {
437 usb_kill_urb(*purb);
438 continue;
439 }
440 *purb = usb_alloc_urb(nr_of_packs(), GFP_KERNEL);
441 if (!*purb) {
442 usx2y_urbs_release(subs);
443 return -ENOMEM;
444 }
445 if (!is_playback && !(*purb)->transfer_buffer) {
446 /* allocate a capture buffer per urb */
447 (*purb)->transfer_buffer =
448 kmalloc_array(subs->maxpacksize,
449 nr_of_packs(), GFP_KERNEL);
450 if (!(*purb)->transfer_buffer) {
451 usx2y_urbs_release(subs);
452 return -ENOMEM;
453 }
454 }
455 (*purb)->dev = dev;
456 (*purb)->pipe = pipe;
457 (*purb)->number_of_packets = nr_of_packs();
458 (*purb)->context = subs;
459 (*purb)->interval = 1;
460 (*purb)->complete = i_usx2y_subs_startup;
461 }
462 return 0;
463 }
464
usx2y_subs_startup(struct snd_usx2y_substream * subs)465 static void usx2y_subs_startup(struct snd_usx2y_substream *subs)
466 {
467 struct usx2ydev *usx2y = subs->usx2y;
468
469 usx2y->prepare_subs = subs;
470 subs->urb[0]->start_frame = -1;
471 wmb();
472 usx2y_urbs_set_complete(usx2y, i_usx2y_subs_startup);
473 }
474
usx2y_urbs_start(struct snd_usx2y_substream * subs)475 static int usx2y_urbs_start(struct snd_usx2y_substream *subs)
476 {
477 int i, err;
478 struct usx2ydev *usx2y = subs->usx2y;
479 struct urb *urb;
480 unsigned long pack;
481
482 err = usx2y_urbs_allocate(subs);
483 if (err < 0)
484 return err;
485 subs->completed_urb = NULL;
486 for (i = 0; i < 4; i++) {
487 struct snd_usx2y_substream *subs = usx2y->subs[i];
488
489 if (subs && atomic_read(&subs->state) >= STATE_PREPARED)
490 goto start;
491 }
492
493 start:
494 usx2y_subs_startup(subs);
495 for (i = 0; i < NRURBS; i++) {
496 urb = subs->urb[i];
497 if (usb_pipein(urb->pipe)) {
498 if (!i)
499 atomic_set(&subs->state, STATE_STARTING3);
500 urb->dev = usx2y->dev;
501 for (pack = 0; pack < nr_of_packs(); pack++) {
502 urb->iso_frame_desc[pack].offset = subs->maxpacksize * pack;
503 urb->iso_frame_desc[pack].length = subs->maxpacksize;
504 }
505 urb->transfer_buffer_length = subs->maxpacksize * nr_of_packs();
506 err = usb_submit_urb(urb, GFP_ATOMIC);
507 if (err < 0) {
508 snd_printk(KERN_ERR "cannot submit datapipe for urb %d, err = %d\n", i, err);
509 err = -EPIPE;
510 goto cleanup;
511 } else {
512 if (!i)
513 usx2y->wait_iso_frame = urb->start_frame;
514 }
515 urb->transfer_flags = 0;
516 } else {
517 atomic_set(&subs->state, STATE_STARTING1);
518 break;
519 }
520 }
521 err = 0;
522 wait_event(usx2y->prepare_wait_queue, !usx2y->prepare_subs);
523 if (atomic_read(&subs->state) != STATE_PREPARED)
524 err = -EPIPE;
525
526 cleanup:
527 if (err) {
528 usx2y_subs_startup_finish(usx2y);
529 usx2y_clients_stop(usx2y); // something is completely wrong > stop everything
530 }
531 return err;
532 }
533
534 /*
535 * return the current pcm pointer. just return the hwptr_done value.
536 */
snd_usx2y_pcm_pointer(struct snd_pcm_substream * substream)537 static snd_pcm_uframes_t snd_usx2y_pcm_pointer(struct snd_pcm_substream *substream)
538 {
539 struct snd_usx2y_substream *subs = substream->runtime->private_data;
540
541 return subs->hwptr_done;
542 }
543
544 /*
545 * start/stop substream
546 */
snd_usx2y_pcm_trigger(struct snd_pcm_substream * substream,int cmd)547 static int snd_usx2y_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
548 {
549 struct snd_usx2y_substream *subs = substream->runtime->private_data;
550
551 switch (cmd) {
552 case SNDRV_PCM_TRIGGER_START:
553 snd_printdd("%s(START)\n", __func__);
554 if (atomic_read(&subs->state) == STATE_PREPARED &&
555 atomic_read(&subs->usx2y->subs[SNDRV_PCM_STREAM_CAPTURE]->state) >= STATE_PREPARED) {
556 atomic_set(&subs->state, STATE_PRERUNNING);
557 } else {
558 snd_printdd("\n");
559 return -EPIPE;
560 }
561 break;
562 case SNDRV_PCM_TRIGGER_STOP:
563 snd_printdd("%s(STOP)\n", __func__);
564 if (atomic_read(&subs->state) >= STATE_PRERUNNING)
565 atomic_set(&subs->state, STATE_PREPARED);
566 break;
567 default:
568 return -EINVAL;
569 }
570 return 0;
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 struct s_c2 {
582 char c1, c2;
583 };
584
585 static const struct s_c2 setrate_44100[] = {
586 { 0x14, 0x08}, // this line sets 44100, well actually a little less
587 { 0x18, 0x40}, // only tascam / frontier design knows the further lines .......
588 { 0x18, 0x42},
589 { 0x18, 0x45},
590 { 0x18, 0x46},
591 { 0x18, 0x48},
592 { 0x18, 0x4A},
593 { 0x18, 0x4C},
594 { 0x18, 0x4E},
595 { 0x18, 0x50},
596 { 0x18, 0x52},
597 { 0x18, 0x54},
598 { 0x18, 0x56},
599 { 0x18, 0x58},
600 { 0x18, 0x5A},
601 { 0x18, 0x5C},
602 { 0x18, 0x5E},
603 { 0x18, 0x60},
604 { 0x18, 0x62},
605 { 0x18, 0x64},
606 { 0x18, 0x66},
607 { 0x18, 0x68},
608 { 0x18, 0x6A},
609 { 0x18, 0x6C},
610 { 0x18, 0x6E},
611 { 0x18, 0x70},
612 { 0x18, 0x72},
613 { 0x18, 0x74},
614 { 0x18, 0x76},
615 { 0x18, 0x78},
616 { 0x18, 0x7A},
617 { 0x18, 0x7C},
618 { 0x18, 0x7E}
619 };
620
621 static const struct s_c2 setrate_48000[] = {
622 { 0x14, 0x09}, // this line sets 48000, well actually a little less
623 { 0x18, 0x40}, // only tascam / frontier design knows the further lines .......
624 { 0x18, 0x42},
625 { 0x18, 0x45},
626 { 0x18, 0x46},
627 { 0x18, 0x48},
628 { 0x18, 0x4A},
629 { 0x18, 0x4C},
630 { 0x18, 0x4E},
631 { 0x18, 0x50},
632 { 0x18, 0x52},
633 { 0x18, 0x54},
634 { 0x18, 0x56},
635 { 0x18, 0x58},
636 { 0x18, 0x5A},
637 { 0x18, 0x5C},
638 { 0x18, 0x5E},
639 { 0x18, 0x60},
640 { 0x18, 0x62},
641 { 0x18, 0x64},
642 { 0x18, 0x66},
643 { 0x18, 0x68},
644 { 0x18, 0x6A},
645 { 0x18, 0x6C},
646 { 0x18, 0x6E},
647 { 0x18, 0x70},
648 { 0x18, 0x73},
649 { 0x18, 0x74},
650 { 0x18, 0x76},
651 { 0x18, 0x78},
652 { 0x18, 0x7A},
653 { 0x18, 0x7C},
654 { 0x18, 0x7E}
655 };
656
657 #define NOOF_SETRATE_URBS ARRAY_SIZE(setrate_48000)
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 (!--usx2y->us04->len)
666 wake_up(&usx2y->in04_wait_queue);
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_urb_seq *us = NULL;
673 int *usbdata = NULL;
674 const struct s_c2 *ra = rate == 48000 ? setrate_48000 : setrate_44100;
675 struct urb *urb;
676
677 if (usx2y->rate != rate) {
678 us = kzalloc(sizeof(*us) + sizeof(struct urb *) * NOOF_SETRATE_URBS, GFP_KERNEL);
679 if (!us) {
680 err = -ENOMEM;
681 goto cleanup;
682 }
683 usbdata = kmalloc_array(NOOF_SETRATE_URBS, sizeof(int),
684 GFP_KERNEL);
685 if (!usbdata) {
686 err = -ENOMEM;
687 goto cleanup;
688 }
689 for (i = 0; i < NOOF_SETRATE_URBS; ++i) {
690 us->urb[i] = usb_alloc_urb(0, GFP_KERNEL);
691 if (!us->urb[i]) {
692 err = -ENOMEM;
693 goto cleanup;
694 }
695 ((char *)(usbdata + i))[0] = ra[i].c1;
696 ((char *)(usbdata + i))[1] = ra[i].c2;
697 usb_fill_bulk_urb(us->urb[i], usx2y->dev, usb_sndbulkpipe(usx2y->dev, 4),
698 usbdata + i, 2, i_usx2y_04int, usx2y);
699 }
700 err = usb_urb_ep_type_check(us->urb[0]);
701 if (err < 0)
702 goto cleanup;
703 us->submitted = 0;
704 us->len = NOOF_SETRATE_URBS;
705 usx2y->us04 = us;
706 wait_event_timeout(usx2y->in04_wait_queue, !us->len, HZ);
707 usx2y->us04 = NULL;
708 if (us->len)
709 err = -ENODEV;
710 cleanup:
711 if (us) {
712 us->submitted = 2*NOOF_SETRATE_URBS;
713 for (i = 0; i < NOOF_SETRATE_URBS; ++i) {
714 urb = us->urb[i];
715 if (!urb)
716 continue;
717 if (urb->status) {
718 if (!err)
719 err = -ENODEV;
720 usb_kill_urb(urb);
721 }
722 usb_free_urb(urb);
723 }
724 usx2y->us04 = NULL;
725 kfree(usbdata);
726 kfree(us);
727 if (!err)
728 usx2y->rate = rate;
729 }
730 }
731
732 return err;
733 }
734
usx2y_format_set(struct usx2ydev * usx2y,snd_pcm_format_t format)735 static int usx2y_format_set(struct usx2ydev *usx2y, snd_pcm_format_t format)
736 {
737 int alternate, err;
738 struct list_head *p;
739
740 if (format == SNDRV_PCM_FORMAT_S24_3LE) {
741 alternate = 2;
742 usx2y->stride = 6;
743 } else {
744 alternate = 1;
745 usx2y->stride = 4;
746 }
747 list_for_each(p, &usx2y->midi_list) {
748 snd_usbmidi_input_stop(p);
749 }
750 usb_kill_urb(usx2y->in04_urb);
751 err = usb_set_interface(usx2y->dev, 0, alternate);
752 if (err) {
753 snd_printk(KERN_ERR "usb_set_interface error\n");
754 return err;
755 }
756 usx2y->in04_urb->dev = usx2y->dev;
757 err = usb_submit_urb(usx2y->in04_urb, GFP_KERNEL);
758 list_for_each(p, &usx2y->midi_list) {
759 snd_usbmidi_input_start(p);
760 }
761 usx2y->format = format;
762 usx2y->rate = 0;
763 return err;
764 }
765
766
snd_usx2y_pcm_hw_params(struct snd_pcm_substream * substream,struct snd_pcm_hw_params * hw_params)767 static int snd_usx2y_pcm_hw_params(struct snd_pcm_substream *substream,
768 struct snd_pcm_hw_params *hw_params)
769 {
770 int err = 0;
771 unsigned int rate = params_rate(hw_params);
772 snd_pcm_format_t format = params_format(hw_params);
773 struct snd_card *card = substream->pstr->pcm->card;
774 struct usx2ydev *dev = usx2y(card);
775 struct snd_usx2y_substream *subs;
776 struct snd_pcm_substream *test_substream;
777 int i;
778
779 mutex_lock(&usx2y(card)->pcm_mutex);
780 snd_printdd("snd_usx2y_hw_params(%p, %p)\n", substream, hw_params);
781 /* all pcm substreams off one usx2y have to operate at the same
782 * rate & format
783 */
784 for (i = 0; i < dev->pcm_devs * 2; i++) {
785 subs = dev->subs[i];
786 if (!subs)
787 continue;
788 test_substream = subs->pcm_substream;
789 if (!test_substream || test_substream == substream ||
790 !test_substream->runtime)
791 continue;
792 if ((test_substream->runtime->format &&
793 test_substream->runtime->format != format) ||
794 (test_substream->runtime->rate &&
795 test_substream->runtime->rate != rate)) {
796 err = -EINVAL;
797 goto error;
798 }
799 }
800
801 error:
802 mutex_unlock(&usx2y(card)->pcm_mutex);
803 return err;
804 }
805
806 /*
807 * free the buffer
808 */
snd_usx2y_pcm_hw_free(struct snd_pcm_substream * substream)809 static int snd_usx2y_pcm_hw_free(struct snd_pcm_substream *substream)
810 {
811 struct snd_pcm_runtime *runtime = substream->runtime;
812 struct snd_usx2y_substream *subs = runtime->private_data;
813 struct snd_usx2y_substream *cap_subs, *playback_subs;
814
815 mutex_lock(&subs->usx2y->pcm_mutex);
816 snd_printdd("snd_usx2y_hw_free(%p)\n", substream);
817
818 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
819 cap_subs = subs->usx2y->subs[SNDRV_PCM_STREAM_CAPTURE];
820 atomic_set(&subs->state, STATE_STOPPED);
821 usx2y_urbs_release(subs);
822 if (!cap_subs->pcm_substream ||
823 !cap_subs->pcm_substream->runtime ||
824 !cap_subs->pcm_substream->runtime->status ||
825 cap_subs->pcm_substream->runtime->status->state < SNDRV_PCM_STATE_PREPARED) {
826 atomic_set(&cap_subs->state, STATE_STOPPED);
827 usx2y_urbs_release(cap_subs);
828 }
829 } else {
830 playback_subs = subs->usx2y->subs[SNDRV_PCM_STREAM_PLAYBACK];
831 if (atomic_read(&playback_subs->state) < STATE_PREPARED) {
832 atomic_set(&subs->state, STATE_STOPPED);
833 usx2y_urbs_release(subs);
834 }
835 }
836 mutex_unlock(&subs->usx2y->pcm_mutex);
837 return 0;
838 }
839
840 /*
841 * prepare callback
842 *
843 * set format and initialize urbs
844 */
snd_usx2y_pcm_prepare(struct snd_pcm_substream * substream)845 static int snd_usx2y_pcm_prepare(struct snd_pcm_substream *substream)
846 {
847 struct snd_pcm_runtime *runtime = substream->runtime;
848 struct snd_usx2y_substream *subs = runtime->private_data;
849 struct usx2ydev *usx2y = subs->usx2y;
850 struct snd_usx2y_substream *capsubs = subs->usx2y->subs[SNDRV_PCM_STREAM_CAPTURE];
851 int err = 0;
852
853 snd_printdd("%s(%p)\n", __func__, substream);
854
855 mutex_lock(&usx2y->pcm_mutex);
856 usx2y_subs_prepare(subs);
857 // Start hardware streams
858 // SyncStream first....
859 if (atomic_read(&capsubs->state) < STATE_PREPARED) {
860 if (usx2y->format != runtime->format) {
861 err = usx2y_format_set(usx2y, runtime->format);
862 if (err < 0)
863 goto up_prepare_mutex;
864 }
865 if (usx2y->rate != runtime->rate) {
866 err = usx2y_rate_set(usx2y, runtime->rate);
867 if (err < 0)
868 goto up_prepare_mutex;
869 }
870 snd_printdd("starting capture pipe for %s\n", subs == capsubs ? "self" : "playpipe");
871 err = usx2y_urbs_start(capsubs);
872 if (err < 0)
873 goto up_prepare_mutex;
874 }
875
876 if (subs != capsubs && atomic_read(&subs->state) < STATE_PREPARED)
877 err = usx2y_urbs_start(subs);
878
879 up_prepare_mutex:
880 mutex_unlock(&usx2y->pcm_mutex);
881 return err;
882 }
883
884 static const struct snd_pcm_hardware snd_usx2y_2c = {
885 .info = (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
886 SNDRV_PCM_INFO_BLOCK_TRANSFER |
887 SNDRV_PCM_INFO_MMAP_VALID |
888 SNDRV_PCM_INFO_BATCH),
889 .formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_3LE,
890 .rates = SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000,
891 .rate_min = 44100,
892 .rate_max = 48000,
893 .channels_min = 2,
894 .channels_max = 2,
895 .buffer_bytes_max = (2*128*1024),
896 .period_bytes_min = 64,
897 .period_bytes_max = (128*1024),
898 .periods_min = 2,
899 .periods_max = 1024,
900 .fifo_size = 0
901 };
902
snd_usx2y_pcm_open(struct snd_pcm_substream * substream)903 static int snd_usx2y_pcm_open(struct snd_pcm_substream *substream)
904 {
905 struct snd_usx2y_substream *subs =
906 ((struct snd_usx2y_substream **)
907 snd_pcm_substream_chip(substream))[substream->stream];
908 struct snd_pcm_runtime *runtime = substream->runtime;
909
910 if (subs->usx2y->chip_status & USX2Y_STAT_CHIP_MMAP_PCM_URBS)
911 return -EBUSY;
912
913 runtime->hw = snd_usx2y_2c;
914 runtime->private_data = subs;
915 subs->pcm_substream = substream;
916 snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_TIME, 1000, 200000);
917 return 0;
918 }
919
snd_usx2y_pcm_close(struct snd_pcm_substream * substream)920 static int snd_usx2y_pcm_close(struct snd_pcm_substream *substream)
921 {
922 struct snd_pcm_runtime *runtime = substream->runtime;
923 struct snd_usx2y_substream *subs = runtime->private_data;
924
925 subs->pcm_substream = NULL;
926
927 return 0;
928 }
929
930 static const struct snd_pcm_ops snd_usx2y_pcm_ops = {
931 .open = snd_usx2y_pcm_open,
932 .close = snd_usx2y_pcm_close,
933 .hw_params = snd_usx2y_pcm_hw_params,
934 .hw_free = snd_usx2y_pcm_hw_free,
935 .prepare = snd_usx2y_pcm_prepare,
936 .trigger = snd_usx2y_pcm_trigger,
937 .pointer = snd_usx2y_pcm_pointer,
938 };
939
940 /*
941 * free a usb stream instance
942 */
usx2y_audio_stream_free(struct snd_usx2y_substream ** usx2y_substream)943 static void usx2y_audio_stream_free(struct snd_usx2y_substream **usx2y_substream)
944 {
945 int stream;
946
947 for_each_pcm_streams(stream) {
948 kfree(usx2y_substream[stream]);
949 usx2y_substream[stream] = NULL;
950 }
951 }
952
snd_usx2y_pcm_private_free(struct snd_pcm * pcm)953 static void snd_usx2y_pcm_private_free(struct snd_pcm *pcm)
954 {
955 struct snd_usx2y_substream **usx2y_stream = pcm->private_data;
956
957 if (usx2y_stream)
958 usx2y_audio_stream_free(usx2y_stream);
959 }
960
usx2y_audio_stream_new(struct snd_card * card,int playback_endpoint,int capture_endpoint)961 static int usx2y_audio_stream_new(struct snd_card *card, int playback_endpoint, int capture_endpoint)
962 {
963 struct snd_pcm *pcm;
964 int err, i;
965 struct snd_usx2y_substream **usx2y_substream =
966 usx2y(card)->subs + 2 * usx2y(card)->pcm_devs;
967
968 for (i = playback_endpoint ? SNDRV_PCM_STREAM_PLAYBACK : SNDRV_PCM_STREAM_CAPTURE;
969 i <= SNDRV_PCM_STREAM_CAPTURE; ++i) {
970 usx2y_substream[i] = kzalloc(sizeof(struct snd_usx2y_substream), GFP_KERNEL);
971 if (!usx2y_substream[i])
972 return -ENOMEM;
973
974 usx2y_substream[i]->usx2y = usx2y(card);
975 }
976
977 if (playback_endpoint)
978 usx2y_substream[SNDRV_PCM_STREAM_PLAYBACK]->endpoint = playback_endpoint;
979 usx2y_substream[SNDRV_PCM_STREAM_CAPTURE]->endpoint = capture_endpoint;
980
981 err = snd_pcm_new(card, NAME_ALLCAPS" Audio", usx2y(card)->pcm_devs,
982 playback_endpoint ? 1 : 0, 1,
983 &pcm);
984 if (err < 0) {
985 usx2y_audio_stream_free(usx2y_substream);
986 return err;
987 }
988
989 if (playback_endpoint)
990 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_usx2y_pcm_ops);
991 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_usx2y_pcm_ops);
992
993 pcm->private_data = usx2y_substream;
994 pcm->private_free = snd_usx2y_pcm_private_free;
995 pcm->info_flags = 0;
996
997 sprintf(pcm->name, NAME_ALLCAPS" Audio #%d", usx2y(card)->pcm_devs);
998
999 if (playback_endpoint) {
1000 snd_pcm_set_managed_buffer(pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream,
1001 SNDRV_DMA_TYPE_CONTINUOUS,
1002 NULL,
1003 64*1024, 128*1024);
1004 }
1005
1006 snd_pcm_set_managed_buffer(pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream,
1007 SNDRV_DMA_TYPE_CONTINUOUS,
1008 NULL,
1009 64*1024, 128*1024);
1010 usx2y(card)->pcm_devs++;
1011
1012 return 0;
1013 }
1014
1015 /*
1016 * create a chip instance and set its names.
1017 */
usx2y_audio_create(struct snd_card * card)1018 int usx2y_audio_create(struct snd_card *card)
1019 {
1020 int err;
1021
1022 err = usx2y_audio_stream_new(card, 0xA, 0x8);
1023 if (err < 0)
1024 return err;
1025 if (le16_to_cpu(usx2y(card)->dev->descriptor.idProduct) == USB_ID_US428) {
1026 err = usx2y_audio_stream_new(card, 0, 0xA);
1027 if (err < 0)
1028 return err;
1029 }
1030 if (le16_to_cpu(usx2y(card)->dev->descriptor.idProduct) != USB_ID_US122)
1031 err = usx2y_rate_set(usx2y(card), 44100); // Lets us428 recognize output-volume settings, disturbs us122.
1032 return err;
1033 }
1034