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Merge branch 'for-3.11-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj...
[linux-block.git] / sound / usb / usx2y / usbusx2yaudio.c
CommitLineData
1da177e4
LT		 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
1da177e4 34#include <linux/interrupt.h>
5a0e3ad6 35#include <linux/slab.h>
1da177e4 36#include <linux/usb.h>
31623caa 37#include <linux/moduleparam.h>
1da177e4
LT		 38#include <sound/core.h>
39#include <sound/info.h>
40#include <sound/pcm.h>
41#include <sound/pcm_params.h>
42#include "usx2y.h"
43#include "usbusx2y.h"
44
45#define USX2Y_NRPACKS 4 /* Default value used for nr of packs per urb.
46 1 to 4 have been tested ok on uhci.
47 To use 3 on ohci, you'd need a patch:
48 look for "0000425-linux-2.6.9-rc4-mm1_ohci-hcd.patch.gz" on
49 "https://bugtrack.alsa-project.org/alsa-bug/bug_view_page.php?bug_id=0000425"
50 .
51 1, 2 and 4 work out of the box on ohci, if I recall correctly.
52 Bigger is safer operation,
53 smaller gives lower latencies.
54 */
55#define USX2Y_NRPACKS_VARIABLE y /* If your system works ok with this module's parameter
56 nrpacks set to 1, you might as well comment
57 this #define out, and thereby produce smaller, faster code.
58 You'd also set USX2Y_NRPACKS to 1 then.
59 */
60
61#ifdef USX2Y_NRPACKS_VARIABLE
62 static int nrpacks = USX2Y_NRPACKS; /* number of packets per urb */
63 #define nr_of_packs() nrpacks
64 module_param(nrpacks, int, 0444);
65 MODULE_PARM_DESC(nrpacks, "Number of packets per URB.");
66#else
67 #define nr_of_packs() USX2Y_NRPACKS
68#endif
69
70
bbe85bbd 71static int usX2Y_urb_capt_retire(struct snd_usX2Y_substream *subs)
1da177e4
LT		 72{
73 struct urb *urb = subs->completed_urb;
bbe85bbd 74 struct snd_pcm_runtime *runtime = subs->pcm_substream->runtime;
1da177e4
LT		 75 unsigned char *cp;
76 int i, len, lens = 0, hwptr_done = subs->hwptr_done;
bbe85bbd 77 struct usX2Ydev *usX2Y = subs->usX2Y;
1da177e4
LT		 78
79 for (i = 0; i < nr_of_packs(); i++) {
80 cp = (unsigned char*)urb->transfer_buffer + urb->iso_frame_desc[i].offset;
81 if (urb->iso_frame_desc[i].status) { /* active? hmm, skip this */
bbe85bbd 82 snd_printk(KERN_ERR "active frame status %i. "
6e8d5d2f 83 "Most probably some hardware problem.\n",
bbe85bbd 84 urb->iso_frame_desc[i].status);
1da177e4
LT		 85 return urb->iso_frame_desc[i].status;
86 }
87 len = urb->iso_frame_desc[i].actual_length / usX2Y->stride;
88 if (! len) {
89 snd_printd("0 == len ERROR!\n");
90 continue;
91 }
92
93 /* copy a data chunk */
94 if ((hwptr_done + len) > runtime->buffer_size) {
95 int cnt = runtime->buffer_size - hwptr_done;
96 int blen = cnt * usX2Y->stride;
97 memcpy(runtime->dma_area + hwptr_done * usX2Y->stride, cp, blen);
98 memcpy(runtime->dma_area, cp + blen, len * usX2Y->stride - blen);
99 } else {
bbe85bbd
TI		 100 memcpy(runtime->dma_area + hwptr_done * usX2Y->stride, cp,
101 len * usX2Y->stride);
1da177e4
LT		 102 }
103 lens += len;
104 if ((hwptr_done += len) >= runtime->buffer_size)
105 hwptr_done -= runtime->buffer_size;
106 }
107
108 subs->hwptr_done = hwptr_done;
109 subs->transfer_done += lens;
110 /* update the pointer, call callback if necessary */
111 if (subs->transfer_done >= runtime->period_size) {
112 subs->transfer_done -= runtime->period_size;
113 snd_pcm_period_elapsed(subs->pcm_substream);
114 }
115 return 0;
116}
117/*
118 * prepare urb for playback data pipe
119 *
120 * we copy the data directly from the pcm buffer.
121 * the current position to be copied is held in hwptr field.
122 * since a urb can handle only a single linear buffer, if the total
123 * transferred area overflows the buffer boundary, we cannot send
124 * it directly from the buffer. thus the data is once copied to
125 * a temporary buffer and urb points to that.
126 */
bbe85bbd 127static int usX2Y_urb_play_prepare(struct snd_usX2Y_substream *subs,
1da177e4
LT		 128 struct urb *cap_urb,
129 struct urb *urb)
130{
131 int count, counts, pack;
bbe85bbd
TI		 132 struct usX2Ydev *usX2Y = subs->usX2Y;
133 struct snd_pcm_runtime *runtime = subs->pcm_substream->runtime;
1da177e4
LT		 134
135 count = 0;
136 for (pack = 0; pack < nr_of_packs(); pack++) {
137 /* calculate the size of a packet */
138 counts = cap_urb->iso_frame_desc[pack].actual_length / usX2Y->stride;
139 count += counts;
140 if (counts < 43 || counts > 50) {
d3d579f8 141 snd_printk(KERN_ERR "should not be here with counts=%i\n", counts);
1da177e4
LT		 142 return -EPIPE;
143 }
144 /* set up descriptor */
145 urb->iso_frame_desc[pack].offset = pack ?
bbe85bbd
TI		 146 urb->iso_frame_desc[pack - 1].offset +
147 urb->iso_frame_desc[pack - 1].length :
1da177e4
LT		 148 0;
149 urb->iso_frame_desc[pack].length = cap_urb->iso_frame_desc[pack].actual_length;
150 }
151 if (atomic_read(&subs->state) >= state_PRERUNNING)
152 if (subs->hwptr + count > runtime->buffer_size) {
153 /* err, the transferred area goes over buffer boundary.
154 * copy the data to the temp buffer.
155 */
156 int len;
157 len = runtime->buffer_size - subs->hwptr;
158 urb->transfer_buffer = subs->tmpbuf;
bbe85bbd
TI		 159 memcpy(subs->tmpbuf, runtime->dma_area +
160 subs->hwptr * usX2Y->stride, len * usX2Y->stride);
161 memcpy(subs->tmpbuf + len * usX2Y->stride,
162 runtime->dma_area, (count - len) * usX2Y->stride);
1da177e4
LT		 163 subs->hwptr += count;
164 subs->hwptr -= runtime->buffer_size;
165 } else {
166 /* set the buffer pointer */
167 urb->transfer_buffer = runtime->dma_area + subs->hwptr * usX2Y->stride;
168 if ((subs->hwptr += count) >= runtime->buffer_size)
169 subs->hwptr -= runtime->buffer_size;
170 }
171 else
172 urb->transfer_buffer = subs->tmpbuf;
173 urb->transfer_buffer_length = count * usX2Y->stride;
174 return 0;
175}
176
177/*
178 * process after playback data complete
179 *
180 * update the current position and call callback if a period is processed.
181 */
bbe85bbd 182static void usX2Y_urb_play_retire(struct snd_usX2Y_substream *subs, struct urb *urb)
1da177e4 183{
bbe85bbd 184 struct snd_pcm_runtime *runtime = subs->pcm_substream->runtime;
1da177e4
LT		 185 int len = urb->actual_length / subs->usX2Y->stride;
186
187 subs->transfer_done += len;
188 subs->hwptr_done += len;
189 if (subs->hwptr_done >= runtime->buffer_size)
190 subs->hwptr_done -= runtime->buffer_size;
191 if (subs->transfer_done >= runtime->period_size) {
192 subs->transfer_done -= runtime->period_size;
193 snd_pcm_period_elapsed(subs->pcm_substream);
194 }
195}
196
bbe85bbd 197static int usX2Y_urb_submit(struct snd_usX2Y_substream *subs, struct urb *urb, int frame)
1da177e4
LT		 198{
199 int err;
200 if (!urb)
201 return -ENODEV;
202 urb->start_frame = (frame + NRURBS * nr_of_packs()); // let hcd do rollover sanity checks
203 urb->hcpriv = NULL;
a014bbad 204 urb->dev = subs->usX2Y->dev; /* we need to set this at each time */
1da177e4 205 if ((err = usb_submit_urb(urb, GFP_ATOMIC)) < 0) {
d3d579f8 206 snd_printk(KERN_ERR "usb_submit_urb() returned %i\n", err);
1da177e4
LT		 207 return err;
208 }
209 return 0;
210}
211
bbe85bbd
TI		 212static inline int usX2Y_usbframe_complete(struct snd_usX2Y_substream *capsubs,
213 struct snd_usX2Y_substream *playbacksubs,
214 int frame)
1da177e4
LT		 215{
216 int err, state;
cb432379
TI		 217 struct urb *urb = playbacksubs->completed_urb;
218
219 state = atomic_read(&playbacksubs->state);
220 if (NULL != urb) {
221 if (state == state_RUNNING)
222 usX2Y_urb_play_retire(playbacksubs, urb);
bbe85bbd
TI		 223 else if (state >= state_PRERUNNING)
224 atomic_inc(&playbacksubs->state);
cb432379
TI		 225 } else {
226 switch (state) {
227 case state_STARTING1:
228 urb = playbacksubs->urb[0];
229 atomic_inc(&playbacksubs->state);
230 break;
231 case state_STARTING2:
232 urb = playbacksubs->urb[1];
233 atomic_inc(&playbacksubs->state);
234 break;
1da177e4 235 }
1da177e4 236 }
cb432379
TI		 237 if (urb) {
238 if ((err = usX2Y_urb_play_prepare(playbacksubs, capsubs->completed_urb, urb)) ||
bbe85bbd 239 (err = usX2Y_urb_submit(playbacksubs, urb, frame))) {
cb432379 240 return err;
bbe85bbd 241 }
cb432379
TI		 242 }
243
244 playbacksubs->completed_urb = NULL;
245
1da177e4
LT		 246 state = atomic_read(&capsubs->state);
247 if (state >= state_PREPARED) {
248 if (state == state_RUNNING) {
249 if ((err = usX2Y_urb_capt_retire(capsubs)))
250 return err;
cb432379
TI		 251 } else if (state >= state_PRERUNNING)
252 atomic_inc(&capsubs->state);
1da177e4
LT		 253 if ((err = usX2Y_urb_submit(capsubs, capsubs->completed_urb, frame)))
254 return err;
255 }
256 capsubs->completed_urb = NULL;
257 return 0;
258}
259
260
bbe85bbd 261static void usX2Y_clients_stop(struct usX2Ydev *usX2Y)
1da177e4
LT		 262{
263 int s, u;
bbe85bbd 264
1da177e4 265 for (s = 0; s < 4; s++) {
bbe85bbd 266 struct snd_usX2Y_substream *subs = usX2Y->subs[s];
1da177e4
LT		 267 if (subs) {
268 snd_printdd("%i %p state=%i\n", s, subs, atomic_read(&subs->state));
269 atomic_set(&subs->state, state_STOPPED);
270 }
271 }
272 for (s = 0; s < 4; s++) {
bbe85bbd 273 struct snd_usX2Y_substream *subs = usX2Y->subs[s];
1da177e4
LT		 274 if (subs) {
275 if (atomic_read(&subs->state) >= state_PRERUNNING) {
5be1efb4
TI		 276 unsigned long flags;
277
278 snd_pcm_stream_lock_irqsave(subs->pcm_substream, flags);
1da177e4 279 snd_pcm_stop(subs->pcm_substream, SNDRV_PCM_STATE_XRUN);
5be1efb4 280 snd_pcm_stream_unlock_irqrestore(subs->pcm_substream, flags);
1da177e4
LT		 281 }
282 for (u = 0; u < NRURBS; u++) {
283 struct urb *urb = subs->urb[u];
284 if (NULL != urb)
bbe85bbd
TI		 285 snd_printdd("%i status=%i start_frame=%i\n",
286 u, urb->status, urb->start_frame);
1da177e4
LT		 287 }
288 }
289 }
290 usX2Y->prepare_subs = NULL;
291 wake_up(&usX2Y->prepare_wait_queue);
292}
293
bbe85bbd
TI		 294static void usX2Y_error_urb_status(struct usX2Ydev *usX2Y,
295 struct snd_usX2Y_substream *subs, struct urb *urb)
1da177e4 296{
d3d579f8 297 snd_printk(KERN_ERR "ep=%i stalled with status=%i\n", subs->endpoint, urb->status);
1da177e4
LT		 298 urb->status = 0;
299 usX2Y_clients_stop(usX2Y);
300}
301
bbe85bbd
TI		 302static void usX2Y_error_sequence(struct usX2Ydev *usX2Y,
303 struct snd_usX2Y_substream *subs, struct urb *urb)
1da177e4 304{
ad361c98
JP		 305 snd_printk(KERN_ERR
306"Sequence Error!(hcd_frame=%i ep=%i%s;wait=%i,frame=%i).\n"
6e8d5d2f 307"Most probably some urb of usb-frame %i is still missing.\n"
ad361c98 308"Cause could be too long delays in usb-hcd interrupt handling.\n",
a014bbad 309 usb_get_current_frame_number(usX2Y->dev),
bbe85bbd
TI		 310 subs->endpoint, usb_pipein(urb->pipe) ? "in" : "out",
311 usX2Y->wait_iso_frame, urb->start_frame, usX2Y->wait_iso_frame);
1da177e4
LT		 312 usX2Y_clients_stop(usX2Y);
313}
314
7d12e780 315static void i_usX2Y_urb_complete(struct urb *urb)
1da177e4 316{
bbe85bbd
TI		 317 struct snd_usX2Y_substream *subs = urb->context;
318 struct usX2Ydev *usX2Y = subs->usX2Y;
1da177e4
LT		 319
320 if (unlikely(atomic_read(&subs->state) < state_PREPARED)) {
bbe85bbd 321 snd_printdd("hcd_frame=%i ep=%i%s status=%i start_frame=%i\n",
a014bbad 322 usb_get_current_frame_number(usX2Y->dev),
bbe85bbd
TI		 323 subs->endpoint, usb_pipein(urb->pipe) ? "in" : "out",
324 urb->status, urb->start_frame);
1da177e4
LT		 325 return;
326 }
327 if (unlikely(urb->status)) {
328 usX2Y_error_urb_status(usX2Y, subs, urb);
329 return;
330 }
bc6191b1 331 if (likely((urb->start_frame & 0xFFFF) == (usX2Y->wait_iso_frame & 0xFFFF)))
1da177e4
LT		 332 subs->completed_urb = urb;
333 else {
334 usX2Y_error_sequence(usX2Y, subs, urb);
335 return;
336 }
337 {
bbe85bbd 338 struct snd_usX2Y_substream *capsubs = usX2Y->subs[SNDRV_PCM_STREAM_CAPTURE],
1da177e4 339 *playbacksubs = usX2Y->subs[SNDRV_PCM_STREAM_PLAYBACK];
bbe85bbd
TI		 340 if (capsubs->completed_urb &&
341 atomic_read(&capsubs->state) >= state_PREPARED &&
342 (playbacksubs->completed_urb ||
343 atomic_read(&playbacksubs->state) < state_PREPARED)) {
635bbb35
KW		 344 if (!usX2Y_usbframe_complete(capsubs, playbacksubs, urb->start_frame))
345 usX2Y->wait_iso_frame += nr_of_packs();
346 else {
1da177e4
LT		 347 snd_printdd("\n");
348 usX2Y_clients_stop(usX2Y);
349 }
350 }
351 }
352}
353
bbe85bbd 354static void usX2Y_urbs_set_complete(struct usX2Ydev * usX2Y,
7d12e780 355 void (*complete)(struct urb *))
1da177e4
LT		 356{
357 int s, u;
358 for (s = 0; s < 4; s++) {
bbe85bbd 359 struct snd_usX2Y_substream *subs = usX2Y->subs[s];
1da177e4
LT		 360 if (NULL != subs)
361 for (u = 0; u < NRURBS; u++) {
362 struct urb * urb = subs->urb[u];
363 if (NULL != urb)
364 urb->complete = complete;
365 }
366 }
367}
368
bbe85bbd 369static void usX2Y_subs_startup_finish(struct usX2Ydev * usX2Y)
1da177e4
LT		 370{
371 usX2Y_urbs_set_complete(usX2Y, i_usX2Y_urb_complete);
372 usX2Y->prepare_subs = NULL;
373}
374
7d12e780 375static void i_usX2Y_subs_startup(struct urb *urb)
1da177e4 376{
bbe85bbd
TI		 377 struct snd_usX2Y_substream *subs = urb->context;
378 struct usX2Ydev *usX2Y = subs->usX2Y;
379 struct snd_usX2Y_substream *prepare_subs = usX2Y->prepare_subs;
1da177e4
LT		 380 if (NULL != prepare_subs)
381 if (urb->start_frame == prepare_subs->urb[0]->start_frame) {
382 usX2Y_subs_startup_finish(usX2Y);
383 atomic_inc(&prepare_subs->state);
384 wake_up(&usX2Y->prepare_wait_queue);
385 }
386
7d12e780 387 i_usX2Y_urb_complete(urb);
1da177e4
LT		 388}
389
bbe85bbd 390static void usX2Y_subs_prepare(struct snd_usX2Y_substream *subs)
1da177e4 391{
bbe85bbd
TI		 392 snd_printdd("usX2Y_substream_prepare(%p) ep=%i urb0=%p urb1=%p\n",
393 subs, subs->endpoint, subs->urb[0], subs->urb[1]);
1da177e4
LT		 394 /* reset the pointer */
395 subs->hwptr = 0;
396 subs->hwptr_done = 0;
397 subs->transfer_done = 0;
398}
399
400
bbe85bbd 401static void usX2Y_urb_release(struct urb **urb, int free_tb)
1da177e4
LT		 402{
403 if (*urb) {
404 usb_kill_urb(*urb);
405 if (free_tb)
406 kfree((*urb)->transfer_buffer);
407 usb_free_urb(*urb);
408 *urb = NULL;
409 }
410}
411/*
412 * release a substreams urbs
413 */
bbe85bbd 414static void usX2Y_urbs_release(struct snd_usX2Y_substream *subs)
1da177e4
LT		 415{
416 int i;
417 snd_printdd("usX2Y_urbs_release() %i\n", subs->endpoint);
418 for (i = 0; i < NRURBS; i++)
bbe85bbd
TI		 419 usX2Y_urb_release(subs->urb + i,
420 subs != subs->usX2Y->subs[SNDRV_PCM_STREAM_PLAYBACK]);
1da177e4 421
4d572776
JJ		 422 kfree(subs->tmpbuf);
423 subs->tmpbuf = NULL;
1da177e4
LT		 424}
425/*
426 * initialize a substream's urbs
427 */
bbe85bbd 428static int usX2Y_urbs_allocate(struct snd_usX2Y_substream *subs)
1da177e4
LT		 429{
430 int i;
431 unsigned int pipe;
432 int is_playback = subs == subs->usX2Y->subs[SNDRV_PCM_STREAM_PLAYBACK];
a014bbad 433 struct usb_device *dev = subs->usX2Y->dev;
1da177e4
LT		 434
435 pipe = is_playback ? usb_sndisocpipe(dev, subs->endpoint) :
436 usb_rcvisocpipe(dev, subs->endpoint);
437 subs->maxpacksize = usb_maxpacket(dev, pipe, is_playback);
438 if (!subs->maxpacksize)
439 return -EINVAL;
440
441 if (is_playback && NULL == subs->tmpbuf) { /* allocate a temporary buffer for playback */
442 subs->tmpbuf = kcalloc(nr_of_packs(), subs->maxpacksize, GFP_KERNEL);
443 if (NULL == subs->tmpbuf) {
444 snd_printk(KERN_ERR "cannot malloc tmpbuf\n");
445 return -ENOMEM;
446 }
447 }
448 /* allocate and initialize data urbs */
449 for (i = 0; i < NRURBS; i++) {
cb432379 450 struct urb **purb = subs->urb + i;
1da177e4
LT		 451 if (*purb) {
452 usb_kill_urb(*purb);
453 continue;
454 }
455 *purb = usb_alloc_urb(nr_of_packs(), GFP_KERNEL);
456 if (NULL == *purb) {
457 usX2Y_urbs_release(subs);
458 return -ENOMEM;
459 }
460 if (!is_playback && !(*purb)->transfer_buffer) {
461 /* allocate a capture buffer per urb */
462 (*purb)->transfer_buffer = kmalloc(subs->maxpacksize * nr_of_packs(), GFP_KERNEL);
463 if (NULL == (*purb)->transfer_buffer) {
464 usX2Y_urbs_release(subs);
465 return -ENOMEM;
466 }
467 }
468 (*purb)->dev = dev;
469 (*purb)->pipe = pipe;
470 (*purb)->number_of_packets = nr_of_packs();
471 (*purb)->context = subs;
472 (*purb)->interval = 1;
473 (*purb)->complete = i_usX2Y_subs_startup;
474 }
475 return 0;
476}
477
bbe85bbd 478static void usX2Y_subs_startup(struct snd_usX2Y_substream *subs)
1da177e4 479{
bbe85bbd 480 struct usX2Ydev *usX2Y = subs->usX2Y;
1da177e4
LT		 481 usX2Y->prepare_subs = subs;
482 subs->urb[0]->start_frame = -1;
483 wmb();
484 usX2Y_urbs_set_complete(usX2Y, i_usX2Y_subs_startup);
485}
486
bbe85bbd 487static int usX2Y_urbs_start(struct snd_usX2Y_substream *subs)
1da177e4
LT		 488{
489 int i, err;
bbe85bbd 490 struct usX2Ydev *usX2Y = subs->usX2Y;
1da177e4
LT		 491
492 if ((err = usX2Y_urbs_allocate(subs)) < 0)
493 return err;
494 subs->completed_urb = NULL;
495 for (i = 0; i < 4; i++) {
bbe85bbd 496 struct snd_usX2Y_substream *subs = usX2Y->subs[i];
1da177e4
LT		 497 if (subs != NULL && atomic_read(&subs->state) >= state_PREPARED)
498 goto start;
499 }
cb432379 500
1da177e4 501 start:
cb432379
TI		 502 usX2Y_subs_startup(subs);
503 for (i = 0; i < NRURBS; i++) {
504 struct urb *urb = subs->urb[i];
505 if (usb_pipein(urb->pipe)) {
506 unsigned long pack;
507 if (0 == i)
508 atomic_set(&subs->state, state_STARTING3);
a014bbad 509 urb->dev = usX2Y->dev;
cb432379
TI		 510 for (pack = 0; pack < nr_of_packs(); pack++) {
511 urb->iso_frame_desc[pack].offset = subs->maxpacksize * pack;
512 urb->iso_frame_desc[pack].length = subs->maxpacksize;
513 }
514 urb->transfer_buffer_length = subs->maxpacksize * nr_of_packs();
515 if ((err = usb_submit_urb(urb, GFP_ATOMIC)) < 0) {
516 snd_printk (KERN_ERR "cannot submit datapipe for urb %d, err = %d\n", i, err);
517 err = -EPIPE;
518 goto cleanup;
635bbb35
KW		 519 } else
520 if (i == 0)
cb432379 521 usX2Y->wait_iso_frame = urb->start_frame;
cb432379
TI		 522 urb->transfer_flags = 0;
523 } else {
524 atomic_set(&subs->state, state_STARTING1);
525 break;
1da177e4 526 }
cb432379
TI		 527 }
528 err = 0;
529 wait_event(usX2Y->prepare_wait_queue, NULL == usX2Y->prepare_subs);
530 if (atomic_read(&subs->state) != state_PREPARED)
531 err = -EPIPE;
532
533 cleanup:
534 if (err) {
535 usX2Y_subs_startup_finish(usX2Y);
536 usX2Y_clients_stop(usX2Y); // something is completely wroong > stop evrything
1da177e4
LT		 537 }
538 return err;
539}
540
541/*
542 * return the current pcm pointer. just return the hwptr_done value.
543 */
bbe85bbd 544static snd_pcm_uframes_t snd_usX2Y_pcm_pointer(struct snd_pcm_substream *substream)
1da177e4 545{
bbe85bbd 546 struct snd_usX2Y_substream *subs = substream->runtime->private_data;
1da177e4
LT		 547 return subs->hwptr_done;
548}
549/*
550 * start/stop substream
551 */
bbe85bbd 552static int snd_usX2Y_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
1da177e4 553{
bbe85bbd 554 struct snd_usX2Y_substream *subs = substream->runtime->private_data;
1da177e4
LT		 555
556 switch (cmd) {
557 case SNDRV_PCM_TRIGGER_START:
558 snd_printdd("snd_usX2Y_pcm_trigger(START)\n");
559 if (atomic_read(&subs->state) == state_PREPARED &&
560 atomic_read(&subs->usX2Y->subs[SNDRV_PCM_STREAM_CAPTURE]->state) >= state_PREPARED) {
561 atomic_set(&subs->state, state_PRERUNNING);
562 } else {
563 snd_printdd("\n");
564 return -EPIPE;
565 }
566 break;
567 case SNDRV_PCM_TRIGGER_STOP:
568 snd_printdd("snd_usX2Y_pcm_trigger(STOP)\n");
569 if (atomic_read(&subs->state) >= state_PRERUNNING)
570 atomic_set(&subs->state, state_PREPARED);
571 break;
572 default:
573 return -EINVAL;
574 }
575 return 0;
576}
577
578
579/*
580 * allocate a buffer, setup samplerate
581 *
582 * so far we use a physically linear buffer although packetize transfer
583 * doesn't need a continuous area.
584 * if sg buffer is supported on the later version of alsa, we'll follow
585 * that.
586 */
587static struct s_c2
588{
589 char c1, c2;
590}
591 SetRate44100[] =
592{
593 { 0x14, 0x08}, // this line sets 44100, well actually a little less
594 { 0x18, 0x40}, // only tascam / frontier design knows the further lines .......
595 { 0x18, 0x42},
596 { 0x18, 0x45},
597 { 0x18, 0x46},
598 { 0x18, 0x48},
599 { 0x18, 0x4A},
600 { 0x18, 0x4C},
601 { 0x18, 0x4E},
602 { 0x18, 0x50},
603 { 0x18, 0x52},
604 { 0x18, 0x54},
605 { 0x18, 0x56},
606 { 0x18, 0x58},
607 { 0x18, 0x5A},
608 { 0x18, 0x5C},
609 { 0x18, 0x5E},
610 { 0x18, 0x60},
611 { 0x18, 0x62},
612 { 0x18, 0x64},
613 { 0x18, 0x66},
614 { 0x18, 0x68},
615 { 0x18, 0x6A},
616 { 0x18, 0x6C},
617 { 0x18, 0x6E},
618 { 0x18, 0x70},
619 { 0x18, 0x72},
620 { 0x18, 0x74},
621 { 0x18, 0x76},
622 { 0x18, 0x78},
623 { 0x18, 0x7A},
624 { 0x18, 0x7C},
625 { 0x18, 0x7E}
626};
627static struct s_c2 SetRate48000[] =
628{
629 { 0x14, 0x09}, // this line sets 48000, well actually a little less
630 { 0x18, 0x40}, // only tascam / frontier design knows the further lines .......
631 { 0x18, 0x42},
632 { 0x18, 0x45},
633 { 0x18, 0x46},
634 { 0x18, 0x48},
635 { 0x18, 0x4A},
636 { 0x18, 0x4C},
637 { 0x18, 0x4E},
638 { 0x18, 0x50},
639 { 0x18, 0x52},
640 { 0x18, 0x54},
641 { 0x18, 0x56},
642 { 0x18, 0x58},
643 { 0x18, 0x5A},
644 { 0x18, 0x5C},
645 { 0x18, 0x5E},
646 { 0x18, 0x60},
647 { 0x18, 0x62},
648 { 0x18, 0x64},
649 { 0x18, 0x66},
650 { 0x18, 0x68},
651 { 0x18, 0x6A},
652 { 0x18, 0x6C},
653 { 0x18, 0x6E},
654 { 0x18, 0x70},
655 { 0x18, 0x73},
656 { 0x18, 0x74},
657 { 0x18, 0x76},
658 { 0x18, 0x78},
659 { 0x18, 0x7A},
660 { 0x18, 0x7C},
661 { 0x18, 0x7E}
662};
663#define NOOF_SETRATE_URBS ARRAY_SIZE(SetRate48000)
664
7d12e780 665static void i_usX2Y_04Int(struct urb *urb)
1da177e4 666{
bbe85bbd 667 struct usX2Ydev *usX2Y = urb->context;
1da177e4 668
d3d579f8
TI		 669 if (urb->status)
670 snd_printk(KERN_ERR "snd_usX2Y_04Int() urb->status=%i\n", urb->status);
1da177e4
LT		 671 if (0 == --usX2Y->US04->len)
672 wake_up(&usX2Y->In04WaitQueue);
673}
674
bbe85bbd 675static int usX2Y_rate_set(struct usX2Ydev *usX2Y, int rate)
1da177e4
LT		 676{
677 int err = 0, i;
bbe85bbd 678 struct snd_usX2Y_urbSeq *us = NULL;
1da177e4
LT		 679 int *usbdata = NULL;
680 struct s_c2 *ra = rate == 48000 ? SetRate48000 : SetRate44100;
681
682 if (usX2Y->rate != rate) {
cb432379 683 us = kzalloc(sizeof(*us) + sizeof(struct urb*) * NOOF_SETRATE_URBS, GFP_KERNEL);
1da177e4
LT		 684 if (NULL == us) {
685 err = -ENOMEM;
686 goto cleanup;
687 }
cb432379 688 usbdata = kmalloc(sizeof(int) * NOOF_SETRATE_URBS, GFP_KERNEL);
1da177e4
LT		 689 if (NULL == usbdata) {
690 err = -ENOMEM;
691 goto cleanup;
692 }
693 for (i = 0; i < NOOF_SETRATE_URBS; ++i) {
694 if (NULL == (us->urb[i] = usb_alloc_urb(0, GFP_KERNEL))) {
695 err = -ENOMEM;
696 goto cleanup;
697 }
698 ((char*)(usbdata + i))[0] = ra[i].c1;
699 ((char*)(usbdata + i))[1] = ra[i].c2;
a014bbad 700 usb_fill_bulk_urb(us->urb[i], usX2Y->dev, usb_sndbulkpipe(usX2Y->dev, 4),
1da177e4 701 usbdata + i, 2, i_usX2Y_04Int, usX2Y);
1da177e4
LT		 702 }
703 us->submitted = 0;
704 us->len = NOOF_SETRATE_URBS;
705 usX2Y->US04 = us;
706 wait_event_timeout(usX2Y->In04WaitQueue, 0 == 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 struct urb *urb = us->urb[i];
715 if (urb->status) {
716 if (!err)
717 err = -ENODEV;
718 usb_kill_urb(urb);
719 }
720 usb_free_urb(urb);
721 }
722 usX2Y->US04 = NULL;
723 kfree(usbdata);
724 kfree(us);
cb432379 725 if (!err)
1da177e4 726 usX2Y->rate = rate;
1da177e4
LT		 727 }
728 }
729
730 return err;
731}
732
733
bbe85bbd 734static int usX2Y_format_set(struct usX2Ydev *usX2Y, snd_pcm_format_t format)
1da177e4
LT		 735{
736 int alternate, err;
737 struct list_head* p;
738 if (format == SNDRV_PCM_FORMAT_S24_3LE) {
739 alternate = 2;
740 usX2Y->stride = 6;
741 } else {
742 alternate = 1;
743 usX2Y->stride = 4;
744 }
d82af9f9 745 list_for_each(p, &usX2Y->midi_list) {
1da177e4
LT		 746 snd_usbmidi_input_stop(p);
747 }
748 usb_kill_urb(usX2Y->In04urb);
a014bbad 749 if ((err = usb_set_interface(usX2Y->dev, 0, alternate))) {
d3d579f8 750 snd_printk(KERN_ERR "usb_set_interface error \n");
1da177e4
LT		 751 return err;
752 }
a014bbad 753 usX2Y->In04urb->dev = usX2Y->dev;
1da177e4 754 err = usb_submit_urb(usX2Y->In04urb, GFP_KERNEL);
d82af9f9 755 list_for_each(p, &usX2Y->midi_list) {
1da177e4
LT		 756 snd_usbmidi_input_start(p);
757 }
758 usX2Y->format = format;
759 usX2Y->rate = 0;
760 return err;
761}
762
763
bbe85bbd
TI		 764static int snd_usX2Y_pcm_hw_params(struct snd_pcm_substream *substream,
765 struct snd_pcm_hw_params *hw_params)
1da177e4
LT		 766{
767 int err = 0;
768 unsigned int rate = params_rate(hw_params);
769 snd_pcm_format_t format = params_format(hw_params);
bbe85bbd
TI		 770 struct snd_card *card = substream->pstr->pcm->card;
771 struct list_head *list;
cb432379
TI		 772
773 snd_printdd("snd_usX2Y_hw_params(%p, %p)\n", substream, hw_params);
774 // all pcm substreams off one usX2Y have to operate at the same rate & format
775 list_for_each(list, &card->devices) {
bbe85bbd
TI		 776 struct snd_device *dev;
777 struct snd_pcm *pcm;
cb432379
TI		 778 int s;
779 dev = snd_device(list);
780 if (dev->type != SNDRV_DEV_PCM)
781 continue;
782 pcm = dev->device_data;
783 for (s = 0; s < 2; ++s) {
bbe85bbd 784 struct snd_pcm_substream *test_substream;
cb432379
TI		 785 test_substream = pcm->streams[s].substream;
786 if (test_substream && test_substream != substream &&
787 test_substream->runtime &&
788 ((test_substream->runtime->format &&
789 test_substream->runtime->format != format) ||
790 (test_substream->runtime->rate &&
791 test_substream->runtime->rate != rate)))
792 return -EINVAL;
1da177e4
LT		 793 }
794 }
795 if (0 > (err = snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(hw_params)))) {
bbe85bbd
TI		 796 snd_printk(KERN_ERR "snd_pcm_lib_malloc_pages(%p, %i) returned %i\n",
797 substream, params_buffer_bytes(hw_params), err);
1da177e4
LT		 798 return err;
799 }
800 return 0;
801}
802
803/*
804 * free the buffer
805 */
bbe85bbd 806static int snd_usX2Y_pcm_hw_free(struct snd_pcm_substream *substream)
1da177e4 807{
bbe85bbd
TI		 808 struct snd_pcm_runtime *runtime = substream->runtime;
809 struct snd_usX2Y_substream *subs = runtime->private_data;
12aa7579 810 mutex_lock(&subs->usX2Y->prepare_mutex);
1da177e4
LT		 811 snd_printdd("snd_usX2Y_hw_free(%p)\n", substream);
812
813 if (SNDRV_PCM_STREAM_PLAYBACK == substream->stream) {
bbe85bbd 814 struct snd_usX2Y_substream *cap_subs = subs->usX2Y->subs[SNDRV_PCM_STREAM_CAPTURE];
1da177e4
LT		 815 atomic_set(&subs->state, state_STOPPED);
816 usX2Y_urbs_release(subs);
817 if (!cap_subs->pcm_substream ||
818 !cap_subs->pcm_substream->runtime ||
819 !cap_subs->pcm_substream->runtime->status ||
820 cap_subs->pcm_substream->runtime->status->state < SNDRV_PCM_STATE_PREPARED) {
821 atomic_set(&cap_subs->state, state_STOPPED);
822 usX2Y_urbs_release(cap_subs);
823 }
824 } else {
bbe85bbd 825 struct snd_usX2Y_substream *playback_subs = subs->usX2Y->subs[SNDRV_PCM_STREAM_PLAYBACK];
1da177e4
LT		 826 if (atomic_read(&playback_subs->state) < state_PREPARED) {
827 atomic_set(&subs->state, state_STOPPED);
828 usX2Y_urbs_release(subs);
829 }
830 }
12aa7579 831 mutex_unlock(&subs->usX2Y->prepare_mutex);
1da177e4
LT		 832 return snd_pcm_lib_free_pages(substream);
833}
834/*
835 * prepare callback
836 *
837 * set format and initialize urbs
838 */
bbe85bbd 839static int snd_usX2Y_pcm_prepare(struct snd_pcm_substream *substream)
1da177e4 840{
bbe85bbd
TI		 841 struct snd_pcm_runtime *runtime = substream->runtime;
842 struct snd_usX2Y_substream *subs = runtime->private_data;
843 struct usX2Ydev *usX2Y = subs->usX2Y;
844 struct snd_usX2Y_substream *capsubs = subs->usX2Y->subs[SNDRV_PCM_STREAM_CAPTURE];
1da177e4
LT		 845 int err = 0;
846 snd_printdd("snd_usX2Y_pcm_prepare(%p)\n", substream);
847
12aa7579 848 mutex_lock(&usX2Y->prepare_mutex);
1da177e4
LT		 849 usX2Y_subs_prepare(subs);
850// Start hardware streams
851// SyncStream first....
852 if (atomic_read(&capsubs->state) < state_PREPARED) {
853 if (usX2Y->format != runtime->format)
854 if ((err = usX2Y_format_set(usX2Y, runtime->format)) < 0)
855 goto up_prepare_mutex;
856 if (usX2Y->rate != runtime->rate)
857 if ((err = usX2Y_rate_set(usX2Y, runtime->rate)) < 0)
858 goto up_prepare_mutex;
859 snd_printdd("starting capture pipe for %s\n", subs == capsubs ? "self" : "playpipe");
860 if (0 > (err = usX2Y_urbs_start(capsubs)))
861 goto up_prepare_mutex;
862 }
863
864 if (subs != capsubs && atomic_read(&subs->state) < state_PREPARED)
865 err = usX2Y_urbs_start(subs);
866
867 up_prepare_mutex:
12aa7579 868 mutex_unlock(&usX2Y->prepare_mutex);
1da177e4
LT		 869 return err;
870}
871
bbe85bbd 872static struct snd_pcm_hardware snd_usX2Y_2c =
1da177e4
LT		 873{
874 .info = (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
875 SNDRV_PCM_INFO_BLOCK_TRANSFER |
2008f137
TI		 876 SNDRV_PCM_INFO_MMAP_VALID |
877 SNDRV_PCM_INFO_BATCH),
1da177e4
LT		 878 .formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_3LE,
879 .rates = SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000,
880 .rate_min = 44100,
881 .rate_max = 48000,
882 .channels_min = 2,
883 .channels_max = 2,
884 .buffer_bytes_max = (2*128*1024),
885 .period_bytes_min = 64,
886 .period_bytes_max = (128*1024),
887 .periods_min = 2,
888 .periods_max = 1024,
889 .fifo_size = 0
890};
891
892
893
bbe85bbd 894static int snd_usX2Y_pcm_open(struct snd_pcm_substream *substream)
1da177e4 895{
bbe85bbd 896 struct snd_usX2Y_substream *subs = ((struct snd_usX2Y_substream **)
1da177e4 897 snd_pcm_substream_chip(substream))[substream->stream];
bbe85bbd 898 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 899
900 if (subs->usX2Y->chip_status & USX2Y_STAT_CHIP_MMAP_PCM_URBS)
901 return -EBUSY;
902
903 runtime->hw = snd_usX2Y_2c;
904 runtime->private_data = subs;
905 subs->pcm_substream = substream;
906 snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_TIME, 1000, 200000);
907 return 0;
908}
909
910
911
bbe85bbd 912static int snd_usX2Y_pcm_close(struct snd_pcm_substream *substream)
1da177e4 913{
bbe85bbd
TI		 914 struct snd_pcm_runtime *runtime = substream->runtime;
915 struct snd_usX2Y_substream *subs = runtime->private_data;
1da177e4
LT		 916
917 subs->pcm_substream = NULL;
918
bbe85bbd 919 return 0;
1da177e4
LT		 920}
921
922
bbe85bbd 923static struct snd_pcm_ops snd_usX2Y_pcm_ops =
1da177e4
LT		 924{
925 .open = snd_usX2Y_pcm_open,
926 .close = snd_usX2Y_pcm_close,
927 .ioctl = snd_pcm_lib_ioctl,
928 .hw_params = snd_usX2Y_pcm_hw_params,
929 .hw_free = snd_usX2Y_pcm_hw_free,
930 .prepare = snd_usX2Y_pcm_prepare,
931 .trigger = snd_usX2Y_pcm_trigger,
932 .pointer = snd_usX2Y_pcm_pointer,
933};
934
935
936/*
937 * free a usb stream instance
938 */
bbe85bbd 939static void usX2Y_audio_stream_free(struct snd_usX2Y_substream **usX2Y_substream)
1da177e4 940{
c111b8de
RK		 941 kfree(usX2Y_substream[SNDRV_PCM_STREAM_PLAYBACK]);
942 usX2Y_substream[SNDRV_PCM_STREAM_PLAYBACK] = NULL;
943
1da177e4
LT		 944 kfree(usX2Y_substream[SNDRV_PCM_STREAM_CAPTURE]);
945 usX2Y_substream[SNDRV_PCM_STREAM_CAPTURE] = NULL;
946}
947
bbe85bbd 948static void snd_usX2Y_pcm_private_free(struct snd_pcm *pcm)
1da177e4 949{
bbe85bbd 950 struct snd_usX2Y_substream **usX2Y_stream = pcm->private_data;
c3e6f7d8 951 if (usX2Y_stream)
1da177e4 952 usX2Y_audio_stream_free(usX2Y_stream);
1da177e4
LT		 953}
954
bbe85bbd 955static int usX2Y_audio_stream_new(struct snd_card *card, int playback_endpoint, int capture_endpoint)
1da177e4 956{
bbe85bbd 957 struct snd_pcm *pcm;
1da177e4 958 int err, i;
bbe85bbd 959 struct snd_usX2Y_substream **usX2Y_substream =
a014bbad 960 usX2Y(card)->subs + 2 * usX2Y(card)->pcm_devs;
1da177e4
LT		 961
962 for (i = playback_endpoint ? SNDRV_PCM_STREAM_PLAYBACK : SNDRV_PCM_STREAM_CAPTURE;
963 i <= SNDRV_PCM_STREAM_CAPTURE; ++i) {
bbe85bbd 964 usX2Y_substream[i] = kzalloc(sizeof(struct snd_usX2Y_substream), GFP_KERNEL);
1da177e4
LT		 965 if (NULL == usX2Y_substream[i]) {
966 snd_printk(KERN_ERR "cannot malloc\n");
967 return -ENOMEM;
968 }
969 usX2Y_substream[i]->usX2Y = usX2Y(card);
970 }
971
972 if (playback_endpoint)
973 usX2Y_substream[SNDRV_PCM_STREAM_PLAYBACK]->endpoint = playback_endpoint;
974 usX2Y_substream[SNDRV_PCM_STREAM_CAPTURE]->endpoint = capture_endpoint;
975
a014bbad 976 err = snd_pcm_new(card, NAME_ALLCAPS" Audio", usX2Y(card)->pcm_devs,
1da177e4
LT		 977 playback_endpoint ? 1 : 0, 1,
978 &pcm);
979 if (err < 0) {
980 usX2Y_audio_stream_free(usX2Y_substream);
981 return err;
982 }
983
984 if (playback_endpoint)
985 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_usX2Y_pcm_ops);
986 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_usX2Y_pcm_ops);
987
988 pcm->private_data = usX2Y_substream;
989 pcm->private_free = snd_usX2Y_pcm_private_free;
990 pcm->info_flags = 0;
991
a014bbad 992 sprintf(pcm->name, NAME_ALLCAPS" Audio #%d", usX2Y(card)->pcm_devs);
1da177e4
LT		 993
994 if ((playback_endpoint &&
995 0 > (err = snd_pcm_lib_preallocate_pages(pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream,
996 SNDRV_DMA_TYPE_CONTINUOUS,
997 snd_dma_continuous_data(GFP_KERNEL),
998 64*1024, 128*1024))) ||
999 0 > (err = snd_pcm_lib_preallocate_pages(pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream,
1000 SNDRV_DMA_TYPE_CONTINUOUS,
1001 snd_dma_continuous_data(GFP_KERNEL),
1002 64*1024, 128*1024))) {
1003 snd_usX2Y_pcm_private_free(pcm);
1004 return err;
1005 }
a014bbad 1006 usX2Y(card)->pcm_devs++;
1da177e4
LT		 1007
1008 return 0;
1009}
1010
1011/*
1012 * create a chip instance and set its names.
1013 */
bbe85bbd 1014int usX2Y_audio_create(struct snd_card *card)
1da177e4
LT		 1015{
1016 int err = 0;
1017
a014bbad 1018 INIT_LIST_HEAD(&usX2Y(card)->pcm_list);
1da177e4
LT		 1019
1020 if (0 > (err = usX2Y_audio_stream_new(card, 0xA, 0x8)))
1021 return err;
a014bbad 1022 if (le16_to_cpu(usX2Y(card)->dev->descriptor.idProduct) == USB_ID_US428)
1da177e4
LT		 1023 if (0 > (err = usX2Y_audio_stream_new(card, 0, 0xA)))
1024 return err;
a014bbad 1025 if (le16_to_cpu(usX2Y(card)->dev->descriptor.idProduct) != USB_ID_US122)
1da177e4
LT		 1026 err = usX2Y_rate_set(usX2Y(card), 44100); // Lets us428 recognize output-volume settings, disturbs us122.
1027 return err;
1028}
Linux 6.x block layer and io_uring tree(s)