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Merge remote-tracking branch 'selinux/next'
[deliverable/linux.git] / drivers / media / usb / cx231xx / cx231xx-audio.c
CommitLineData
e0d3bafd
SD		 1/*
2 * Conexant Cx231xx audio extension
3 *
4 * Copyright (C) 2008 <srinivasa.deevi at conexant dot com>
5 * Based on em28xx driver
6 *
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
21 */
22
589dadf2 23#include "cx231xx.h"
e0d3bafd 24#include <linux/kernel.h>
e0d3bafd
SD		 25#include <linux/init.h>
26#include <linux/sound.h>
27#include <linux/spinlock.h>
28#include <linux/soundcard.h>
29#include <linux/slab.h>
30#include <linux/vmalloc.h>
31#include <linux/proc_fs.h>
32#include <linux/module.h>
33#include <sound/core.h>
34#include <sound/pcm.h>
35#include <sound/pcm_params.h>
36#include <sound/info.h>
37#include <sound/initval.h>
38#include <sound/control.h>
39#include <media/v4l2-common.h>
e0d3bafd
SD		 40
41static int debug;
42module_param(debug, int, 0644);
43MODULE_PARM_DESC(debug, "activates debug info");
44
e0d3bafd
SD		 45static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;
46
47static int cx231xx_isoc_audio_deinit(struct cx231xx *dev)
48{
49 int i;
50
336fea92 51 dev_dbg(dev->dev, "Stopping isoc\n");
e0d3bafd 52
e0d3bafd 53 for (i = 0; i < CX231XX_AUDIO_BUFS; i++) {
84b5dbf3
MCC		 54 if (dev->adev.urb[i]) {
55 if (!irqs_disabled())
56 usb_kill_urb(dev->adev.urb[i]);
57 else
58 usb_unlink_urb(dev->adev.urb[i]);
e0d3bafd 59
84b5dbf3
MCC		 60 usb_free_urb(dev->adev.urb[i]);
61 dev->adev.urb[i] = NULL;
e0d3bafd 62
84b5dbf3
MCC		 63 kfree(dev->adev.transfer_buffer[i]);
64 dev->adev.transfer_buffer[i] = NULL;
84b5dbf3 65 }
e0d3bafd
SD		 66 }
67
68 return 0;
69}
70
64fbf444
PB		 71static int cx231xx_bulk_audio_deinit(struct cx231xx *dev)
72{
73 int i;
74
336fea92 75 dev_dbg(dev->dev, "Stopping bulk\n");
64fbf444
PB		 76
77 for (i = 0; i < CX231XX_AUDIO_BUFS; i++) {
78 if (dev->adev.urb[i]) {
79 if (!irqs_disabled())
80 usb_kill_urb(dev->adev.urb[i]);
81 else
82 usb_unlink_urb(dev->adev.urb[i]);
83
84 usb_free_urb(dev->adev.urb[i]);
85 dev->adev.urb[i] = NULL;
86
87 kfree(dev->adev.transfer_buffer[i]);
88 dev->adev.transfer_buffer[i] = NULL;
89 }
90 }
91
92 return 0;
93}
94
e0d3bafd
SD		 95static void cx231xx_audio_isocirq(struct urb *urb)
96{
84b5dbf3
MCC		 97 struct cx231xx *dev = urb->context;
98 int i;
99 unsigned int oldptr;
100 int period_elapsed = 0;
101 int status;
102 unsigned char *cp;
103 unsigned int stride;
e0d3bafd 104 struct snd_pcm_substream *substream;
84b5dbf3
MCC		 105 struct snd_pcm_runtime *runtime;
106
990862a2
MCC		 107 if (dev->state & DEV_DISCONNECTED)
108 return;
109
84b5dbf3
MCC		 110 switch (urb->status) {
111 case 0: /* success */
112 case -ETIMEDOUT: /* NAK */
113 break;
114 case -ECONNRESET: /* kill */
115 case -ENOENT:
116 case -ESHUTDOWN:
117 return;
118 default: /* error */
336fea92 119 dev_dbg(dev->dev, "urb completition error %d.\n",
56d8a3b0 120 urb->status);
84b5dbf3 121 break;
e0d3bafd
SD		 122 }
123
61b04cb2
MCC		 124 if (atomic_read(&dev->stream_started) == 0)
125 return;
126
e0d3bafd
SD		 127 if (dev->adev.capture_pcm_substream) {
128 substream = dev->adev.capture_pcm_substream;
129 runtime = substream->runtime;
130 stride = runtime->frame_bits >> 3;
131
132 for (i = 0; i < urb->number_of_packets; i++) {
cde4362f
MCC		 133 int length = urb->iso_frame_desc[i].actual_length /
134 stride;
e0d3bafd 135 cp = (unsigned char *)urb->transfer_buffer +
cde4362f 136 urb->iso_frame_desc[i].offset;
e0d3bafd
SD		 137
138 if (!length)
139 continue;
140
141 oldptr = dev->adev.hwptr_done_capture;
142 if (oldptr + length >= runtime->buffer_size) {
cde4362f
MCC		 143 unsigned int cnt;
144
145 cnt = runtime->buffer_size - oldptr;
e0d3bafd
SD		 146 memcpy(runtime->dma_area + oldptr * stride, cp,
147 cnt * stride);
148 memcpy(runtime->dma_area, cp + cnt * stride,
149 length * stride - cnt * stride);
150 } else {
151 memcpy(runtime->dma_area + oldptr * stride, cp,
152 length * stride);
153 }
154
155 snd_pcm_stream_lock(substream);
156
157 dev->adev.hwptr_done_capture += length;
b9255176
SD		 158 if (dev->adev.hwptr_done_capture >=
159 runtime->buffer_size)
160 dev->adev.hwptr_done_capture -=
161 runtime->buffer_size;
e0d3bafd
SD		 162
163 dev->adev.capture_transfer_done += length;
b9255176
SD		 164 if (dev->adev.capture_transfer_done >=
165 runtime->period_size) {
166 dev->adev.capture_transfer_done -=
167 runtime->period_size;
e0d3bafd
SD		 168 period_elapsed = 1;
169 }
e0d3bafd
SD		 170 snd_pcm_stream_unlock(substream);
171 }
172 if (period_elapsed)
173 snd_pcm_period_elapsed(substream);
174 }
175 urb->status = 0;
176
177 status = usb_submit_urb(urb, GFP_ATOMIC);
178 if (status < 0) {
336fea92 179 dev_err(dev->dev,
b7085c08
MCC		 180 "resubmit of audio urb failed (error=%i)\n",
181 status);
e0d3bafd
SD		 182 }
183 return;
184}
185
64fbf444
PB		 186static void cx231xx_audio_bulkirq(struct urb *urb)
187{
188 struct cx231xx *dev = urb->context;
189 unsigned int oldptr;
190 int period_elapsed = 0;
191 int status;
192 unsigned char *cp;
193 unsigned int stride;
194 struct snd_pcm_substream *substream;
195 struct snd_pcm_runtime *runtime;
196
990862a2
MCC		 197 if (dev->state & DEV_DISCONNECTED)
198 return;
199
64fbf444
PB		 200 switch (urb->status) {
201 case 0: /* success */
202 case -ETIMEDOUT: /* NAK */
203 break;
204 case -ECONNRESET: /* kill */
205 case -ENOENT:
206 case -ESHUTDOWN:
207 return;
208 default: /* error */
336fea92 209 dev_dbg(dev->dev, "urb completition error %d.\n",
56d8a3b0 210 urb->status);
64fbf444
PB		 211 break;
212 }
213
61b04cb2
MCC		 214 if (atomic_read(&dev->stream_started) == 0)
215 return;
216
64fbf444
PB		 217 if (dev->adev.capture_pcm_substream) {
218 substream = dev->adev.capture_pcm_substream;
219 runtime = substream->runtime;
220 stride = runtime->frame_bits >> 3;
221
222 if (1) {
223 int length = urb->actual_length /
224 stride;
225 cp = (unsigned char *)urb->transfer_buffer;
226
227 oldptr = dev->adev.hwptr_done_capture;
228 if (oldptr + length >= runtime->buffer_size) {
229 unsigned int cnt;
230
231 cnt = runtime->buffer_size - oldptr;
232 memcpy(runtime->dma_area + oldptr * stride, cp,
233 cnt * stride);
234 memcpy(runtime->dma_area, cp + cnt * stride,
235 length * stride - cnt * stride);
236 } else {
237 memcpy(runtime->dma_area + oldptr * stride, cp,
238 length * stride);
239 }
240
241 snd_pcm_stream_lock(substream);
242
243 dev->adev.hwptr_done_capture += length;
244 if (dev->adev.hwptr_done_capture >=
245 runtime->buffer_size)
246 dev->adev.hwptr_done_capture -=
247 runtime->buffer_size;
248
249 dev->adev.capture_transfer_done += length;
250 if (dev->adev.capture_transfer_done >=
251 runtime->period_size) {
252 dev->adev.capture_transfer_done -=
253 runtime->period_size;
254 period_elapsed = 1;
255 }
256 snd_pcm_stream_unlock(substream);
257 }
258 if (period_elapsed)
259 snd_pcm_period_elapsed(substream);
260 }
261 urb->status = 0;
262
263 status = usb_submit_urb(urb, GFP_ATOMIC);
264 if (status < 0) {
336fea92 265 dev_err(dev->dev,
b7085c08
MCC		 266 "resubmit of audio urb failed (error=%i)\n",
267 status);
64fbf444
PB		 268 }
269 return;
270}
271
e0d3bafd
SD		 272static int cx231xx_init_audio_isoc(struct cx231xx *dev)
273{
84b5dbf3
MCC		 274 int i, errCode;
275 int sb_size;
e0d3bafd 276
336fea92 277 dev_dbg(dev->dev,
b7085c08 278 "%s: Starting ISO AUDIO transfers\n", __func__);
e0d3bafd 279
990862a2
MCC		 280 if (dev->state & DEV_DISCONNECTED)
281 return -ENODEV;
282
64fbf444 283 sb_size = CX231XX_ISO_NUM_AUDIO_PACKETS * dev->adev.max_pkt_size;
e0d3bafd
SD		 284
285 for (i = 0; i < CX231XX_AUDIO_BUFS; i++) {
286 struct urb *urb;
287 int j, k;
288
289 dev->adev.transfer_buffer[i] = kmalloc(sb_size, GFP_ATOMIC);
290 if (!dev->adev.transfer_buffer[i])
291 return -ENOMEM;
292
293 memset(dev->adev.transfer_buffer[i], 0x80, sb_size);
64fbf444 294 urb = usb_alloc_urb(CX231XX_ISO_NUM_AUDIO_PACKETS, GFP_ATOMIC);
e0d3bafd 295 if (!urb) {
e0d3bafd
SD		 296 for (j = 0; j < i; j++) {
297 usb_free_urb(dev->adev.urb[j]);
298 kfree(dev->adev.transfer_buffer[j]);
299 }
300 return -ENOMEM;
301 }
302
303 urb->dev = dev->udev;
304 urb->context = dev;
b9255176
SD		 305 urb->pipe = usb_rcvisocpipe(dev->udev,
306 dev->adev.end_point_addr);
cd5534be 307 urb->transfer_flags = URB_ISO_ASAP;
e0d3bafd
SD		 308 urb->transfer_buffer = dev->adev.transfer_buffer[i];
309 urb->interval = 1;
310 urb->complete = cx231xx_audio_isocirq;
64fbf444 311 urb->number_of_packets = CX231XX_ISO_NUM_AUDIO_PACKETS;
e0d3bafd
SD		 312 urb->transfer_buffer_length = sb_size;
313
64fbf444 314 for (j = k = 0; j < CX231XX_ISO_NUM_AUDIO_PACKETS;
b9255176 315 j++, k += dev->adev.max_pkt_size) {
e0d3bafd 316 urb->iso_frame_desc[j].offset = k;
84b5dbf3 317 urb->iso_frame_desc[j].length = dev->adev.max_pkt_size;
e0d3bafd
SD		 318 }
319 dev->adev.urb[i] = urb;
320 }
321
322 for (i = 0; i < CX231XX_AUDIO_BUFS; i++) {
323 errCode = usb_submit_urb(dev->adev.urb[i], GFP_ATOMIC);
324 if (errCode < 0) {
325 cx231xx_isoc_audio_deinit(dev);
326 return errCode;
327 }
328 }
329
330 return errCode;
331}
332
64fbf444
PB		 333static int cx231xx_init_audio_bulk(struct cx231xx *dev)
334{
335 int i, errCode;
336 int sb_size;
337
336fea92 338 dev_dbg(dev->dev,
b7085c08 339 "%s: Starting BULK AUDIO transfers\n", __func__);
64fbf444 340
990862a2
MCC		 341 if (dev->state & DEV_DISCONNECTED)
342 return -ENODEV;
343
64fbf444
PB		 344 sb_size = CX231XX_NUM_AUDIO_PACKETS * dev->adev.max_pkt_size;
345
346 for (i = 0; i < CX231XX_AUDIO_BUFS; i++) {
347 struct urb *urb;
348 int j;
349
350 dev->adev.transfer_buffer[i] = kmalloc(sb_size, GFP_ATOMIC);
351 if (!dev->adev.transfer_buffer[i])
352 return -ENOMEM;
353
354 memset(dev->adev.transfer_buffer[i], 0x80, sb_size);
355 urb = usb_alloc_urb(CX231XX_NUM_AUDIO_PACKETS, GFP_ATOMIC);
356 if (!urb) {
64fbf444
PB		 357 for (j = 0; j < i; j++) {
358 usb_free_urb(dev->adev.urb[j]);
359 kfree(dev->adev.transfer_buffer[j]);
360 }
361 return -ENOMEM;
362 }
363
364 urb->dev = dev->udev;
365 urb->context = dev;
366 urb->pipe = usb_rcvbulkpipe(dev->udev,
367 dev->adev.end_point_addr);
cd5534be 368 urb->transfer_flags = 0;
64fbf444
PB		 369 urb->transfer_buffer = dev->adev.transfer_buffer[i];
370 urb->complete = cx231xx_audio_bulkirq;
371 urb->transfer_buffer_length = sb_size;
372
373 dev->adev.urb[i] = urb;
374
375 }
376
377 for (i = 0; i < CX231XX_AUDIO_BUFS; i++) {
378 errCode = usb_submit_urb(dev->adev.urb[i], GFP_ATOMIC);
379 if (errCode < 0) {
380 cx231xx_bulk_audio_deinit(dev);
381 return errCode;
382 }
383 }
384
385 return errCode;
386}
387
e0d3bafd
SD		 388static int snd_pcm_alloc_vmalloc_buffer(struct snd_pcm_substream *subs,
389 size_t size)
390{
391 struct snd_pcm_runtime *runtime = subs->runtime;
56d8a3b0 392 struct cx231xx *dev = snd_pcm_substream_chip(subs);
e0d3bafd 393
336fea92 394 dev_dbg(dev->dev, "Allocating vbuffer\n");
e0d3bafd
SD		 395 if (runtime->dma_area) {
396 if (runtime->dma_bytes > size)
397 return 0;
398
399 vfree(runtime->dma_area);
400 }
401 runtime->dma_area = vmalloc(size);
402 if (!runtime->dma_area)
403 return -ENOMEM;
404
405 runtime->dma_bytes = size;
406
407 return 0;
408}
409
410static struct snd_pcm_hardware snd_cx231xx_hw_capture = {
6e4f574b
SD		 411 .info = SNDRV_PCM_INFO_BLOCK_TRANSFER |
412 SNDRV_PCM_INFO_MMAP |
413 SNDRV_PCM_INFO_INTERLEAVED |
414 SNDRV_PCM_INFO_MMAP_VALID,
e0d3bafd
SD		 415
416 .formats = SNDRV_PCM_FMTBIT_S16_LE,
417
418 .rates = SNDRV_PCM_RATE_CONTINUOUS | SNDRV_PCM_RATE_KNOT,
419
420 .rate_min = 48000,
421 .rate_max = 48000,
422 .channels_min = 2,
423 .channels_max = 2,
424 .buffer_bytes_max = 62720 * 8, /* just about the value in usbaudio.c */
cde4362f 425 .period_bytes_min = 64, /* 12544/2, */
e0d3bafd
SD		 426 .period_bytes_max = 12544,
427 .periods_min = 2,
cde4362f 428 .periods_max = 98, /* 12544, */
e0d3bafd
SD		 429};
430
431static int snd_cx231xx_capture_open(struct snd_pcm_substream *substream)
432{
433 struct cx231xx *dev = snd_pcm_substream_chip(substream);
434 struct snd_pcm_runtime *runtime = substream->runtime;
435 int ret = 0;
436
336fea92 437 dev_dbg(dev->dev,
56d8a3b0 438 "opening device and trying to acquire exclusive lock\n");
e0d3bafd 439
990862a2 440 if (dev->state & DEV_DISCONNECTED) {
336fea92 441 dev_err(dev->dev,
b7085c08 442 "Can't open. the device was removed.\n");
990862a2
MCC		 443 return -ENODEV;
444 }
445
84b5dbf3 446 /* set alternate setting for audio interface */
b9255176 447 /* 1 - 48000 samples per sec */
61b04cb2 448 mutex_lock(&dev->lock);
64fbf444
PB		 449 if (dev->USE_ISO)
450 ret = cx231xx_set_alt_setting(dev, INDEX_AUDIO, 1);
451 else
452 ret = cx231xx_set_alt_setting(dev, INDEX_AUDIO, 0);
61b04cb2 453 mutex_unlock(&dev->lock);
84b5dbf3 454 if (ret < 0) {
336fea92 455 dev_err(dev->dev,
b7085c08 456 "failed to set alternate setting !\n");
e0d3bafd 457
84b5dbf3
MCC		 458 return ret;
459 }
e0d3bafd 460
e0d3bafd
SD		 461 runtime->hw = snd_cx231xx_hw_capture;
462
84b5dbf3 463 mutex_lock(&dev->lock);
61b04cb2
MCC		 464 /* inform hardware to start streaming */
465 ret = cx231xx_capture_start(dev, 1, Audio);
466
e0d3bafd 467 dev->adev.users++;
84b5dbf3 468 mutex_unlock(&dev->lock);
e0d3bafd
SD		 469
470 snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS);
471 dev->adev.capture_pcm_substream = substream;
472 runtime->private_data = dev;
473
474 return 0;
475}
476
477static int snd_cx231xx_pcm_close(struct snd_pcm_substream *substream)
478{
84b5dbf3 479 int ret;
e0d3bafd
SD		 480 struct cx231xx *dev = snd_pcm_substream_chip(substream);
481
336fea92 482 dev_dbg(dev->dev, "closing device\n");
e0d3bafd 483
61b04cb2
MCC		 484 /* inform hardware to stop streaming */
485 mutex_lock(&dev->lock);
64fbf444
PB		 486 ret = cx231xx_capture_start(dev, 0, Audio);
487
84b5dbf3 488 /* set alternate setting for audio interface */
b9255176
SD		 489 /* 1 - 48000 samples per sec */
490 ret = cx231xx_set_alt_setting(dev, INDEX_AUDIO, 0);
84b5dbf3 491 if (ret < 0) {
336fea92 492 dev_err(dev->dev,
b7085c08 493 "failed to set alternate setting !\n");
e0d3bafd 494
61b04cb2 495 mutex_unlock(&dev->lock);
84b5dbf3
MCC		 496 return ret;
497 }
e0d3bafd 498
84b5dbf3 499 dev->adev.users--;
9dd73448
JBT		 500 if (substream->runtime->dma_area) {
501 dev_dbg(dev->dev, "freeing\n");
502 vfree(substream->runtime->dma_area);
503 substream->runtime->dma_area = NULL;
504 }
e0d3bafd
SD		 505 mutex_unlock(&dev->lock);
506
507 if (dev->adev.users == 0 && dev->adev.shutdown == 1) {
336fea92
MCC		 508 dev_dbg(dev->dev, "audio users: %d\n", dev->adev.users);
509 dev_dbg(dev->dev, "disabling audio stream!\n");
e0d3bafd 510 dev->adev.shutdown = 0;
336fea92 511 dev_dbg(dev->dev, "released lock\n");
61b04cb2
MCC		 512 if (atomic_read(&dev->stream_started) > 0) {
513 atomic_set(&dev->stream_started, 0);
514 schedule_work(&dev->wq_trigger);
515 }
e0d3bafd
SD		 516 }
517 return 0;
518}
519
520static int snd_cx231xx_hw_capture_params(struct snd_pcm_substream *substream,
84b5dbf3 521 struct snd_pcm_hw_params *hw_params)
e0d3bafd 522{
56d8a3b0 523 struct cx231xx *dev = snd_pcm_substream_chip(substream);
e0d3bafd
SD		 524 int ret;
525
336fea92 526 dev_dbg(dev->dev, "Setting capture parameters\n");
e0d3bafd
SD		 527
528 ret = snd_pcm_alloc_vmalloc_buffer(substream,
84b5dbf3 529 params_buffer_bytes(hw_params));
da983503
HV		 530#if 0
531 /* TODO: set up cx231xx audio chip to deliver the correct audio format,
532 current default is 48000hz multiplexed => 96000hz mono
533 which shouldn't matter since analogue TV only supports mono */
534 unsigned int channels, rate, format;
535
e0d3bafd
SD		 536 format = params_format(hw_params);
537 rate = params_rate(hw_params);
538 channels = params_channels(hw_params);
da983503 539#endif
e0d3bafd 540
da983503 541 return ret;
e0d3bafd
SD		 542}
543
544static int snd_cx231xx_hw_capture_free(struct snd_pcm_substream *substream)
545{
546 struct cx231xx *dev = snd_pcm_substream_chip(substream);
547
336fea92 548 dev_dbg(dev->dev, "Stop capture, if needed\n");
e0d3bafd 549
61b04cb2
MCC		 550 if (atomic_read(&dev->stream_started) > 0) {
551 atomic_set(&dev->stream_started, 0);
552 schedule_work(&dev->wq_trigger);
553 }
e0d3bafd
SD		 554
555 return 0;
556}
557
558static int snd_cx231xx_prepare(struct snd_pcm_substream *substream)
559{
64fbf444
PB		 560 struct cx231xx *dev = snd_pcm_substream_chip(substream);
561
562 dev->adev.hwptr_done_capture = 0;
563 dev->adev.capture_transfer_done = 0;
564
e0d3bafd
SD		 565 return 0;
566}
567
61b04cb2
MCC		 568static void audio_trigger(struct work_struct *work)
569{
570 struct cx231xx *dev = container_of(work, struct cx231xx, wq_trigger);
571
572 if (atomic_read(&dev->stream_started)) {
336fea92 573 dev_dbg(dev->dev, "starting capture");
61b04cb2
MCC		 574 if (is_fw_load(dev) == 0)
575 cx25840_call(dev, core, load_fw);
576 if (dev->USE_ISO)
577 cx231xx_init_audio_isoc(dev);
578 else
579 cx231xx_init_audio_bulk(dev);
580 } else {
336fea92 581 dev_dbg(dev->dev, "stopping capture");
61b04cb2
MCC		 582 cx231xx_isoc_audio_deinit(dev);
583 }
584}
585
e0d3bafd 586static int snd_cx231xx_capture_trigger(struct snd_pcm_substream *substream,
84b5dbf3 587 int cmd)
e0d3bafd
SD		 588{
589 struct cx231xx *dev = snd_pcm_substream_chip(substream);
da983503 590 int retval = 0;
e0d3bafd 591
990862a2
MCC		 592 if (dev->state & DEV_DISCONNECTED)
593 return -ENODEV;
594
84b5dbf3 595 spin_lock(&dev->adev.slock);
e0d3bafd
SD		 596 switch (cmd) {
597 case SNDRV_PCM_TRIGGER_START:
61b04cb2 598 atomic_set(&dev->stream_started, 1);
e0d3bafd
SD		 599 break;
600 case SNDRV_PCM_TRIGGER_STOP:
61b04cb2 601 atomic_set(&dev->stream_started, 0);
84b5dbf3 602 break;
e0d3bafd
SD		 603 default:
604 retval = -EINVAL;
da983503 605 break;
e0d3bafd 606 }
84b5dbf3 607 spin_unlock(&dev->adev.slock);
61b04cb2
MCC		 608
609 schedule_work(&dev->wq_trigger);
610
da983503 611 return retval;
e0d3bafd
SD		 612}
613
614static snd_pcm_uframes_t snd_cx231xx_capture_pointer(struct snd_pcm_substream
84b5dbf3 615 *substream)
e0d3bafd
SD		 616{
617 struct cx231xx *dev;
84b5dbf3 618 unsigned long flags;
e0d3bafd
SD		 619 snd_pcm_uframes_t hwptr_done;
620
621 dev = snd_pcm_substream_chip(substream);
622
84b5dbf3 623 spin_lock_irqsave(&dev->adev.slock, flags);
e0d3bafd 624 hwptr_done = dev->adev.hwptr_done_capture;
84b5dbf3 625 spin_unlock_irqrestore(&dev->adev.slock, flags);
e0d3bafd
SD		 626
627 return hwptr_done;
628}
629
630static struct page *snd_pcm_get_vmalloc_page(struct snd_pcm_substream *subs,
631 unsigned long offset)
632{
633 void *pageptr = subs->runtime->dma_area + offset;
634
635 return vmalloc_to_page(pageptr);
636}
637
638static struct snd_pcm_ops snd_cx231xx_pcm_capture = {
84b5dbf3
MCC		 639 .open = snd_cx231xx_capture_open,
640 .close = snd_cx231xx_pcm_close,
641 .ioctl = snd_pcm_lib_ioctl,
e0d3bafd 642 .hw_params = snd_cx231xx_hw_capture_params,
84b5dbf3
MCC		 643 .hw_free = snd_cx231xx_hw_capture_free,
644 .prepare = snd_cx231xx_prepare,
645 .trigger = snd_cx231xx_capture_trigger,
646 .pointer = snd_cx231xx_capture_pointer,
647 .page = snd_pcm_get_vmalloc_page,
e0d3bafd
SD		 648};
649
650static int cx231xx_audio_init(struct cx231xx *dev)
651{
652 struct cx231xx_audio *adev = &dev->adev;
84b5dbf3
MCC		 653 struct snd_pcm *pcm;
654 struct snd_card *card;
655 static int devnr;
656 int err;
657 struct usb_interface *uif;
658 int i, isoc_pipe = 0;
e0d3bafd
SD		 659
660 if (dev->has_alsa_audio != 1) {
661 /* This device does not support the extension (in this case
662 the device is expecting the snd-usb-audio module or
663 doesn't have analog audio support at all) */
664 return 0;
665 }
666
336fea92 667 dev_dbg(dev->dev,
b7085c08 668 "probing for cx231xx non standard usbaudio\n");
e0d3bafd 669
336fea92 670 err = snd_card_new(dev->dev, index[devnr], "Cx231xx Audio",
e7356888 671 THIS_MODULE, 0, &card);
a938b8c5
MCC		 672 if (err < 0)
673 return err;
e0d3bafd
SD		 674
675 spin_lock_init(&adev->slock);
676 err = snd_pcm_new(card, "Cx231xx Audio", 0, 0, 1, &pcm);
677 if (err < 0) {
678 snd_card_free(card);
679 return err;
680 }
681
84b5dbf3
MCC		 682 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE,
683 &snd_cx231xx_pcm_capture);
e0d3bafd
SD		 684 pcm->info_flags = 0;
685 pcm->private_data = dev;
686 strcpy(pcm->name, "Conexant cx231xx Capture");
935539c9 687 strcpy(card->driver, "Cx231xx-Audio");
e0d3bafd
SD		 688 strcpy(card->shortname, "Cx231xx Audio");
689 strcpy(card->longname, "Conexant cx231xx Audio");
690
61b04cb2
MCC		 691 INIT_WORK(&dev->wq_trigger, audio_trigger);
692
e0d3bafd
SD		 693 err = snd_card_register(card);
694 if (err < 0) {
695 snd_card_free(card);
696 return err;
697 }
698 adev->sndcard = card;
699 adev->udev = dev->udev;
700
84b5dbf3
MCC		 701 /* compute alternate max packet sizes for Audio */
702 uif =
703 dev->udev->actconfig->interface[dev->current_pcb_config.
704 hs_config_info[0].interface_info.
705 audio_index + 1];
e0d3bafd 706
84b5dbf3 707 adev->end_point_addr =
69a11a32
HV		 708 uif->altsetting[0].endpoint[isoc_pipe].desc.
709 bEndpointAddress;
e0d3bafd 710
84b5dbf3 711 adev->num_alt = uif->num_altsetting;
336fea92 712 dev_info(dev->dev,
b7085c08 713 "audio EndPoint Addr 0x%x, Alternate settings: %i\n",
ed0e3729 714 adev->end_point_addr, adev->num_alt);
84b5dbf3 715 adev->alt_max_pkt_size = kmalloc(32 * adev->num_alt, GFP_KERNEL);
e0d3bafd 716
ed0e3729 717 if (adev->alt_max_pkt_size == NULL)
84b5dbf3 718 return -ENOMEM;
e0d3bafd 719
84b5dbf3
MCC		 720 for (i = 0; i < adev->num_alt; i++) {
721 u16 tmp =
722 le16_to_cpu(uif->altsetting[i].endpoint[isoc_pipe].desc.
723 wMaxPacketSize);
724 adev->alt_max_pkt_size[i] =
725 (tmp & 0x07ff) * (((tmp & 0x1800) >> 11) + 1);
336fea92 726 dev_dbg(dev->dev,
b7085c08
MCC		 727 "audio alternate setting %i, max size= %i\n", i,
728 adev->alt_max_pkt_size[i]);
84b5dbf3 729 }
e0d3bafd
SD		 730
731 return 0;
732}
733
734static int cx231xx_audio_fini(struct cx231xx *dev)
735{
736 if (dev == NULL)
737 return 0;
738
739 if (dev->has_alsa_audio != 1) {
740 /* This device does not support the extension (in this case
741 the device is expecting the snd-usb-audio module or
742 doesn't have analog audio support at all) */
743 return 0;
744 }
745
746 if (dev->adev.sndcard) {
747 snd_card_free(dev->adev.sndcard);
84b5dbf3 748 kfree(dev->adev.alt_max_pkt_size);
e0d3bafd
SD		 749 dev->adev.sndcard = NULL;
750 }
751
752 return 0;
753}
754
755static struct cx231xx_ops audio_ops = {
84b5dbf3 756 .id = CX231XX_AUDIO,
e0d3bafd
SD		 757 .name = "Cx231xx Audio Extension",
758 .init = cx231xx_audio_init,
759 .fini = cx231xx_audio_fini,
760};
761
762static int __init cx231xx_alsa_register(void)
763{
764 return cx231xx_register_extension(&audio_ops);
765}
766
767static void __exit cx231xx_alsa_unregister(void)
768{
769 cx231xx_unregister_extension(&audio_ops);
770}
771
772MODULE_LICENSE("GPL");
773MODULE_AUTHOR("Srinivasa Deevi <srinivasa.deevi@conexant.com>");
774MODULE_DESCRIPTION("Cx231xx Audio driver");
775
776module_init(cx231xx_alsa_register);
777module_exit(cx231xx_alsa_unregister);
Linux kernel - Deliverables
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