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