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