This source file includes following definitions.
- cx231xx_isoc_audio_deinit
- cx231xx_bulk_audio_deinit
- cx231xx_audio_isocirq
- cx231xx_audio_bulkirq
- cx231xx_init_audio_isoc
- cx231xx_init_audio_bulk
- snd_pcm_alloc_vmalloc_buffer
- snd_cx231xx_capture_open
- snd_cx231xx_pcm_close
- snd_cx231xx_hw_capture_params
- snd_cx231xx_hw_capture_free
- snd_cx231xx_prepare
- audio_trigger
- snd_cx231xx_capture_trigger
- snd_cx231xx_capture_pointer
- snd_pcm_get_vmalloc_page
- cx231xx_audio_init
- cx231xx_audio_fini
- cx231xx_alsa_register
- cx231xx_alsa_unregister
1
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5
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7
8
9 #include "cx231xx.h"
10 #include <linux/kernel.h>
11 #include <linux/init.h>
12 #include <linux/sound.h>
13 #include <linux/spinlock.h>
14 #include <linux/soundcard.h>
15 #include <linux/slab.h>
16 #include <linux/vmalloc.h>
17 #include <linux/proc_fs.h>
18 #include <linux/module.h>
19 #include <sound/core.h>
20 #include <sound/pcm.h>
21 #include <sound/pcm_params.h>
22 #include <sound/info.h>
23 #include <sound/initval.h>
24 #include <sound/control.h>
25 #include <media/v4l2-common.h>
26
27 static int debug;
28 module_param(debug, int, 0644);
29 MODULE_PARM_DESC(debug, "activates debug info");
30
31 static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;
32
33 static int cx231xx_isoc_audio_deinit(struct cx231xx *dev)
34 {
35 int i;
36
37 dev_dbg(dev->dev, "Stopping isoc\n");
38
39 for (i = 0; i < CX231XX_AUDIO_BUFS; i++) {
40 if (dev->adev.urb[i]) {
41 if (!irqs_disabled())
42 usb_kill_urb(dev->adev.urb[i]);
43 else
44 usb_unlink_urb(dev->adev.urb[i]);
45
46 usb_free_urb(dev->adev.urb[i]);
47 dev->adev.urb[i] = NULL;
48
49 kfree(dev->adev.transfer_buffer[i]);
50 dev->adev.transfer_buffer[i] = NULL;
51 }
52 }
53
54 return 0;
55 }
56
57 static int cx231xx_bulk_audio_deinit(struct cx231xx *dev)
58 {
59 int i;
60
61 dev_dbg(dev->dev, "Stopping bulk\n");
62
63 for (i = 0; i < CX231XX_AUDIO_BUFS; i++) {
64 if (dev->adev.urb[i]) {
65 if (!irqs_disabled())
66 usb_kill_urb(dev->adev.urb[i]);
67 else
68 usb_unlink_urb(dev->adev.urb[i]);
69
70 usb_free_urb(dev->adev.urb[i]);
71 dev->adev.urb[i] = NULL;
72
73 kfree(dev->adev.transfer_buffer[i]);
74 dev->adev.transfer_buffer[i] = NULL;
75 }
76 }
77
78 return 0;
79 }
80
81 static void cx231xx_audio_isocirq(struct urb *urb)
82 {
83 struct cx231xx *dev = urb->context;
84 int i;
85 unsigned int oldptr;
86 int period_elapsed = 0;
87 int status;
88 unsigned char *cp;
89 unsigned int stride;
90 struct snd_pcm_substream *substream;
91 struct snd_pcm_runtime *runtime;
92
93 if (dev->state & DEV_DISCONNECTED)
94 return;
95
96 switch (urb->status) {
97 case 0:
98 case -ETIMEDOUT:
99 break;
100 case -ECONNRESET:
101 case -ENOENT:
102 case -ESHUTDOWN:
103 return;
104 default:
105 dev_dbg(dev->dev, "urb completion error %d.\n",
106 urb->status);
107 break;
108 }
109
110 if (atomic_read(&dev->stream_started) == 0)
111 return;
112
113 if (dev->adev.capture_pcm_substream) {
114 substream = dev->adev.capture_pcm_substream;
115 runtime = substream->runtime;
116 stride = runtime->frame_bits >> 3;
117
118 for (i = 0; i < urb->number_of_packets; i++) {
119 unsigned long flags;
120 int length = urb->iso_frame_desc[i].actual_length /
121 stride;
122 cp = (unsigned char *)urb->transfer_buffer +
123 urb->iso_frame_desc[i].offset;
124
125 if (!length)
126 continue;
127
128 oldptr = dev->adev.hwptr_done_capture;
129 if (oldptr + length >= runtime->buffer_size) {
130 unsigned int cnt;
131
132 cnt = runtime->buffer_size - oldptr;
133 memcpy(runtime->dma_area + oldptr * stride, cp,
134 cnt * stride);
135 memcpy(runtime->dma_area, cp + cnt * stride,
136 length * stride - cnt * stride);
137 } else {
138 memcpy(runtime->dma_area + oldptr * stride, cp,
139 length * stride);
140 }
141
142 snd_pcm_stream_lock_irqsave(substream, flags);
143
144 dev->adev.hwptr_done_capture += length;
145 if (dev->adev.hwptr_done_capture >=
146 runtime->buffer_size)
147 dev->adev.hwptr_done_capture -=
148 runtime->buffer_size;
149
150 dev->adev.capture_transfer_done += length;
151 if (dev->adev.capture_transfer_done >=
152 runtime->period_size) {
153 dev->adev.capture_transfer_done -=
154 runtime->period_size;
155 period_elapsed = 1;
156 }
157 snd_pcm_stream_unlock_irqrestore(substream, flags);
158 }
159 if (period_elapsed)
160 snd_pcm_period_elapsed(substream);
161 }
162 urb->status = 0;
163
164 status = usb_submit_urb(urb, GFP_ATOMIC);
165 if (status < 0) {
166 dev_err(dev->dev,
167 "resubmit of audio urb failed (error=%i)\n",
168 status);
169 }
170 return;
171 }
172
173 static void cx231xx_audio_bulkirq(struct urb *urb)
174 {
175 struct cx231xx *dev = urb->context;
176 unsigned int oldptr;
177 int period_elapsed = 0;
178 int status;
179 unsigned char *cp;
180 unsigned int stride;
181 struct snd_pcm_substream *substream;
182 struct snd_pcm_runtime *runtime;
183
184 if (dev->state & DEV_DISCONNECTED)
185 return;
186
187 switch (urb->status) {
188 case 0:
189 case -ETIMEDOUT:
190 break;
191 case -ECONNRESET:
192 case -ENOENT:
193 case -ESHUTDOWN:
194 return;
195 default:
196 dev_dbg(dev->dev, "urb completion error %d.\n",
197 urb->status);
198 break;
199 }
200
201 if (atomic_read(&dev->stream_started) == 0)
202 return;
203
204 if (dev->adev.capture_pcm_substream) {
205 substream = dev->adev.capture_pcm_substream;
206 runtime = substream->runtime;
207 stride = runtime->frame_bits >> 3;
208
209 if (1) {
210 unsigned long flags;
211 int length = urb->actual_length /
212 stride;
213 cp = (unsigned char *)urb->transfer_buffer;
214
215 oldptr = dev->adev.hwptr_done_capture;
216 if (oldptr + length >= runtime->buffer_size) {
217 unsigned int cnt;
218
219 cnt = runtime->buffer_size - oldptr;
220 memcpy(runtime->dma_area + oldptr * stride, cp,
221 cnt * stride);
222 memcpy(runtime->dma_area, cp + cnt * stride,
223 length * stride - cnt * stride);
224 } else {
225 memcpy(runtime->dma_area + oldptr * stride, cp,
226 length * stride);
227 }
228
229 snd_pcm_stream_lock_irqsave(substream, flags);
230
231 dev->adev.hwptr_done_capture += length;
232 if (dev->adev.hwptr_done_capture >=
233 runtime->buffer_size)
234 dev->adev.hwptr_done_capture -=
235 runtime->buffer_size;
236
237 dev->adev.capture_transfer_done += length;
238 if (dev->adev.capture_transfer_done >=
239 runtime->period_size) {
240 dev->adev.capture_transfer_done -=
241 runtime->period_size;
242 period_elapsed = 1;
243 }
244 snd_pcm_stream_unlock_irqrestore(substream, flags);
245 }
246 if (period_elapsed)
247 snd_pcm_period_elapsed(substream);
248 }
249 urb->status = 0;
250
251 status = usb_submit_urb(urb, GFP_ATOMIC);
252 if (status < 0) {
253 dev_err(dev->dev,
254 "resubmit of audio urb failed (error=%i)\n",
255 status);
256 }
257 return;
258 }
259
260 static int cx231xx_init_audio_isoc(struct cx231xx *dev)
261 {
262 int i, errCode;
263 int sb_size;
264
265 dev_dbg(dev->dev,
266 "%s: Starting ISO AUDIO transfers\n", __func__);
267
268 if (dev->state & DEV_DISCONNECTED)
269 return -ENODEV;
270
271 sb_size = CX231XX_ISO_NUM_AUDIO_PACKETS * dev->adev.max_pkt_size;
272
273 for (i = 0; i < CX231XX_AUDIO_BUFS; i++) {
274 struct urb *urb;
275 int j, k;
276
277 dev->adev.transfer_buffer[i] = kmalloc(sb_size, GFP_ATOMIC);
278 if (!dev->adev.transfer_buffer[i])
279 return -ENOMEM;
280
281 memset(dev->adev.transfer_buffer[i], 0x80, sb_size);
282 urb = usb_alloc_urb(CX231XX_ISO_NUM_AUDIO_PACKETS, GFP_ATOMIC);
283 if (!urb) {
284 for (j = 0; j < i; j++) {
285 usb_free_urb(dev->adev.urb[j]);
286 kfree(dev->adev.transfer_buffer[j]);
287 }
288 return -ENOMEM;
289 }
290
291 urb->dev = dev->udev;
292 urb->context = dev;
293 urb->pipe = usb_rcvisocpipe(dev->udev,
294 dev->adev.end_point_addr);
295 urb->transfer_flags = URB_ISO_ASAP;
296 urb->transfer_buffer = dev->adev.transfer_buffer[i];
297 urb->interval = 1;
298 urb->complete = cx231xx_audio_isocirq;
299 urb->number_of_packets = CX231XX_ISO_NUM_AUDIO_PACKETS;
300 urb->transfer_buffer_length = sb_size;
301
302 for (j = k = 0; j < CX231XX_ISO_NUM_AUDIO_PACKETS;
303 j++, k += dev->adev.max_pkt_size) {
304 urb->iso_frame_desc[j].offset = k;
305 urb->iso_frame_desc[j].length = dev->adev.max_pkt_size;
306 }
307 dev->adev.urb[i] = urb;
308 }
309
310 for (i = 0; i < CX231XX_AUDIO_BUFS; i++) {
311 errCode = usb_submit_urb(dev->adev.urb[i], GFP_ATOMIC);
312 if (errCode < 0) {
313 cx231xx_isoc_audio_deinit(dev);
314 return errCode;
315 }
316 }
317
318 return errCode;
319 }
320
321 static int cx231xx_init_audio_bulk(struct cx231xx *dev)
322 {
323 int i, errCode;
324 int sb_size;
325
326 dev_dbg(dev->dev,
327 "%s: Starting BULK AUDIO transfers\n", __func__);
328
329 if (dev->state & DEV_DISCONNECTED)
330 return -ENODEV;
331
332 sb_size = CX231XX_NUM_AUDIO_PACKETS * dev->adev.max_pkt_size;
333
334 for (i = 0; i < CX231XX_AUDIO_BUFS; i++) {
335 struct urb *urb;
336 int j;
337
338 dev->adev.transfer_buffer[i] = kmalloc(sb_size, GFP_ATOMIC);
339 if (!dev->adev.transfer_buffer[i])
340 return -ENOMEM;
341
342 memset(dev->adev.transfer_buffer[i], 0x80, sb_size);
343 urb = usb_alloc_urb(CX231XX_NUM_AUDIO_PACKETS, GFP_ATOMIC);
344 if (!urb) {
345 for (j = 0; j < i; j++) {
346 usb_free_urb(dev->adev.urb[j]);
347 kfree(dev->adev.transfer_buffer[j]);
348 }
349 return -ENOMEM;
350 }
351
352 urb->dev = dev->udev;
353 urb->context = dev;
354 urb->pipe = usb_rcvbulkpipe(dev->udev,
355 dev->adev.end_point_addr);
356 urb->transfer_flags = 0;
357 urb->transfer_buffer = dev->adev.transfer_buffer[i];
358 urb->complete = cx231xx_audio_bulkirq;
359 urb->transfer_buffer_length = sb_size;
360
361 dev->adev.urb[i] = urb;
362
363 }
364
365 for (i = 0; i < CX231XX_AUDIO_BUFS; i++) {
366 errCode = usb_submit_urb(dev->adev.urb[i], GFP_ATOMIC);
367 if (errCode < 0) {
368 cx231xx_bulk_audio_deinit(dev);
369 return errCode;
370 }
371 }
372
373 return errCode;
374 }
375
376 static int snd_pcm_alloc_vmalloc_buffer(struct snd_pcm_substream *subs,
377 size_t size)
378 {
379 struct snd_pcm_runtime *runtime = subs->runtime;
380 struct cx231xx *dev = snd_pcm_substream_chip(subs);
381
382 dev_dbg(dev->dev, "Allocating vbuffer\n");
383 if (runtime->dma_area) {
384 if (runtime->dma_bytes > size)
385 return 0;
386
387 vfree(runtime->dma_area);
388 }
389 runtime->dma_area = vmalloc(size);
390 if (!runtime->dma_area)
391 return -ENOMEM;
392
393 runtime->dma_bytes = size;
394
395 return 0;
396 }
397
398 static const struct snd_pcm_hardware snd_cx231xx_hw_capture = {
399 .info = SNDRV_PCM_INFO_BLOCK_TRANSFER |
400 SNDRV_PCM_INFO_MMAP |
401 SNDRV_PCM_INFO_INTERLEAVED |
402 SNDRV_PCM_INFO_MMAP_VALID,
403
404 .formats = SNDRV_PCM_FMTBIT_S16_LE,
405
406 .rates = SNDRV_PCM_RATE_CONTINUOUS | SNDRV_PCM_RATE_KNOT,
407
408 .rate_min = 48000,
409 .rate_max = 48000,
410 .channels_min = 2,
411 .channels_max = 2,
412 .buffer_bytes_max = 62720 * 8,
413 .period_bytes_min = 64,
414 .period_bytes_max = 12544,
415 .periods_min = 2,
416 .periods_max = 98,
417 };
418
419 static int snd_cx231xx_capture_open(struct snd_pcm_substream *substream)
420 {
421 struct cx231xx *dev = snd_pcm_substream_chip(substream);
422 struct snd_pcm_runtime *runtime = substream->runtime;
423 int ret = 0;
424
425 dev_dbg(dev->dev,
426 "opening device and trying to acquire exclusive lock\n");
427
428 if (dev->state & DEV_DISCONNECTED) {
429 dev_err(dev->dev,
430 "Can't open. the device was removed.\n");
431 return -ENODEV;
432 }
433
434
435
436 mutex_lock(&dev->lock);
437 if (dev->USE_ISO)
438 ret = cx231xx_set_alt_setting(dev, INDEX_AUDIO, 1);
439 else
440 ret = cx231xx_set_alt_setting(dev, INDEX_AUDIO, 0);
441 mutex_unlock(&dev->lock);
442 if (ret < 0) {
443 dev_err(dev->dev,
444 "failed to set alternate setting !\n");
445
446 return ret;
447 }
448
449 runtime->hw = snd_cx231xx_hw_capture;
450
451 mutex_lock(&dev->lock);
452
453 ret = cx231xx_capture_start(dev, 1, Audio);
454
455 dev->adev.users++;
456 mutex_unlock(&dev->lock);
457
458 snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS);
459 dev->adev.capture_pcm_substream = substream;
460 runtime->private_data = dev;
461
462 return 0;
463 }
464
465 static int snd_cx231xx_pcm_close(struct snd_pcm_substream *substream)
466 {
467 int ret;
468 struct cx231xx *dev = snd_pcm_substream_chip(substream);
469
470 dev_dbg(dev->dev, "closing device\n");
471
472
473 mutex_lock(&dev->lock);
474 ret = cx231xx_capture_start(dev, 0, Audio);
475
476
477
478 ret = cx231xx_set_alt_setting(dev, INDEX_AUDIO, 0);
479 if (ret < 0) {
480 dev_err(dev->dev,
481 "failed to set alternate setting !\n");
482
483 mutex_unlock(&dev->lock);
484 return ret;
485 }
486
487 dev->adev.users--;
488 if (substream->runtime->dma_area) {
489 dev_dbg(dev->dev, "freeing\n");
490 vfree(substream->runtime->dma_area);
491 substream->runtime->dma_area = NULL;
492 }
493 mutex_unlock(&dev->lock);
494
495 if (dev->adev.users == 0 && dev->adev.shutdown == 1) {
496 dev_dbg(dev->dev, "audio users: %d\n", dev->adev.users);
497 dev_dbg(dev->dev, "disabling audio stream!\n");
498 dev->adev.shutdown = 0;
499 dev_dbg(dev->dev, "released lock\n");
500 if (atomic_read(&dev->stream_started) > 0) {
501 atomic_set(&dev->stream_started, 0);
502 schedule_work(&dev->wq_trigger);
503 }
504 }
505 return 0;
506 }
507
508 static int snd_cx231xx_hw_capture_params(struct snd_pcm_substream *substream,
509 struct snd_pcm_hw_params *hw_params)
510 {
511 struct cx231xx *dev = snd_pcm_substream_chip(substream);
512 int ret;
513
514 dev_dbg(dev->dev, "Setting capture parameters\n");
515
516 ret = snd_pcm_alloc_vmalloc_buffer(substream,
517 params_buffer_bytes(hw_params));
518 #if 0
519
520
521
522 unsigned int channels, rate, format;
523
524 format = params_format(hw_params);
525 rate = params_rate(hw_params);
526 channels = params_channels(hw_params);
527 #endif
528
529 return ret;
530 }
531
532 static int snd_cx231xx_hw_capture_free(struct snd_pcm_substream *substream)
533 {
534 struct cx231xx *dev = snd_pcm_substream_chip(substream);
535
536 dev_dbg(dev->dev, "Stop capture, if needed\n");
537
538 if (atomic_read(&dev->stream_started) > 0) {
539 atomic_set(&dev->stream_started, 0);
540 schedule_work(&dev->wq_trigger);
541 }
542
543 return 0;
544 }
545
546 static int snd_cx231xx_prepare(struct snd_pcm_substream *substream)
547 {
548 struct cx231xx *dev = snd_pcm_substream_chip(substream);
549
550 dev->adev.hwptr_done_capture = 0;
551 dev->adev.capture_transfer_done = 0;
552
553 return 0;
554 }
555
556 static void audio_trigger(struct work_struct *work)
557 {
558 struct cx231xx *dev = container_of(work, struct cx231xx, wq_trigger);
559
560 if (atomic_read(&dev->stream_started)) {
561 dev_dbg(dev->dev, "starting capture");
562 if (is_fw_load(dev) == 0)
563 cx25840_call(dev, core, load_fw);
564 if (dev->USE_ISO)
565 cx231xx_init_audio_isoc(dev);
566 else
567 cx231xx_init_audio_bulk(dev);
568 } else {
569 dev_dbg(dev->dev, "stopping capture");
570 cx231xx_isoc_audio_deinit(dev);
571 }
572 }
573
574 static int snd_cx231xx_capture_trigger(struct snd_pcm_substream *substream,
575 int cmd)
576 {
577 struct cx231xx *dev = snd_pcm_substream_chip(substream);
578 int retval = 0;
579
580 if (dev->state & DEV_DISCONNECTED)
581 return -ENODEV;
582
583 spin_lock(&dev->adev.slock);
584 switch (cmd) {
585 case SNDRV_PCM_TRIGGER_START:
586 atomic_set(&dev->stream_started, 1);
587 break;
588 case SNDRV_PCM_TRIGGER_STOP:
589 atomic_set(&dev->stream_started, 0);
590 break;
591 default:
592 retval = -EINVAL;
593 break;
594 }
595 spin_unlock(&dev->adev.slock);
596
597 schedule_work(&dev->wq_trigger);
598
599 return retval;
600 }
601
602 static snd_pcm_uframes_t snd_cx231xx_capture_pointer(struct snd_pcm_substream
603 *substream)
604 {
605 struct cx231xx *dev;
606 unsigned long flags;
607 snd_pcm_uframes_t hwptr_done;
608
609 dev = snd_pcm_substream_chip(substream);
610
611 spin_lock_irqsave(&dev->adev.slock, flags);
612 hwptr_done = dev->adev.hwptr_done_capture;
613 spin_unlock_irqrestore(&dev->adev.slock, flags);
614
615 return hwptr_done;
616 }
617
618 static struct page *snd_pcm_get_vmalloc_page(struct snd_pcm_substream *subs,
619 unsigned long offset)
620 {
621 void *pageptr = subs->runtime->dma_area + offset;
622
623 return vmalloc_to_page(pageptr);
624 }
625
626 static const struct snd_pcm_ops snd_cx231xx_pcm_capture = {
627 .open = snd_cx231xx_capture_open,
628 .close = snd_cx231xx_pcm_close,
629 .ioctl = snd_pcm_lib_ioctl,
630 .hw_params = snd_cx231xx_hw_capture_params,
631 .hw_free = snd_cx231xx_hw_capture_free,
632 .prepare = snd_cx231xx_prepare,
633 .trigger = snd_cx231xx_capture_trigger,
634 .pointer = snd_cx231xx_capture_pointer,
635 .page = snd_pcm_get_vmalloc_page,
636 };
637
638 static int cx231xx_audio_init(struct cx231xx *dev)
639 {
640 struct cx231xx_audio *adev = &dev->adev;
641 struct snd_pcm *pcm;
642 struct snd_card *card;
643 static int devnr;
644 int err;
645 struct usb_interface *uif;
646 int i, isoc_pipe = 0;
647
648 if (dev->has_alsa_audio != 1) {
649
650
651
652 return 0;
653 }
654
655 dev_dbg(dev->dev,
656 "probing for cx231xx non standard usbaudio\n");
657
658 err = snd_card_new(dev->dev, index[devnr], "Cx231xx Audio",
659 THIS_MODULE, 0, &card);
660 if (err < 0)
661 return err;
662
663 spin_lock_init(&adev->slock);
664 err = snd_pcm_new(card, "Cx231xx Audio", 0, 0, 1, &pcm);
665 if (err < 0)
666 goto err_free_card;
667
668 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE,
669 &snd_cx231xx_pcm_capture);
670 pcm->info_flags = 0;
671 pcm->private_data = dev;
672 strscpy(pcm->name, "Conexant cx231xx Capture", sizeof(pcm->name));
673 strscpy(card->driver, "Cx231xx-Audio", sizeof(card->driver));
674 strscpy(card->shortname, "Cx231xx Audio", sizeof(card->shortname));
675 strscpy(card->longname, "Conexant cx231xx Audio", sizeof(card->longname));
676
677 INIT_WORK(&dev->wq_trigger, audio_trigger);
678
679 err = snd_card_register(card);
680 if (err < 0)
681 goto err_free_card;
682
683 adev->sndcard = card;
684 adev->udev = dev->udev;
685
686
687 uif =
688 dev->udev->actconfig->interface[dev->current_pcb_config.
689 hs_config_info[0].interface_info.
690 audio_index + 1];
691
692 if (uif->altsetting[0].desc.bNumEndpoints < isoc_pipe + 1) {
693 err = -ENODEV;
694 goto err_free_card;
695 }
696
697 adev->end_point_addr =
698 uif->altsetting[0].endpoint[isoc_pipe].desc.
699 bEndpointAddress;
700
701 adev->num_alt = uif->num_altsetting;
702 dev_info(dev->dev,
703 "audio EndPoint Addr 0x%x, Alternate settings: %i\n",
704 adev->end_point_addr, adev->num_alt);
705 adev->alt_max_pkt_size = kmalloc_array(32, adev->num_alt, GFP_KERNEL);
706 if (!adev->alt_max_pkt_size) {
707 err = -ENOMEM;
708 goto err_free_card;
709 }
710
711 for (i = 0; i < adev->num_alt; i++) {
712 u16 tmp;
713
714 if (uif->altsetting[i].desc.bNumEndpoints < isoc_pipe + 1) {
715 err = -ENODEV;
716 goto err_free_pkt_size;
717 }
718
719 tmp = le16_to_cpu(uif->altsetting[i].endpoint[isoc_pipe].desc.
720 wMaxPacketSize);
721 adev->alt_max_pkt_size[i] =
722 (tmp & 0x07ff) * (((tmp & 0x1800) >> 11) + 1);
723 dev_dbg(dev->dev,
724 "audio alternate setting %i, max size= %i\n", i,
725 adev->alt_max_pkt_size[i]);
726 }
727
728 return 0;
729
730 err_free_pkt_size:
731 kfree(adev->alt_max_pkt_size);
732 err_free_card:
733 snd_card_free(card);
734
735 return err;
736 }
737
738 static int cx231xx_audio_fini(struct cx231xx *dev)
739 {
740 if (dev == NULL)
741 return 0;
742
743 if (dev->has_alsa_audio != 1) {
744
745
746
747 return 0;
748 }
749
750 if (dev->adev.sndcard) {
751 snd_card_free(dev->adev.sndcard);
752 kfree(dev->adev.alt_max_pkt_size);
753 dev->adev.sndcard = NULL;
754 }
755
756 return 0;
757 }
758
759 static struct cx231xx_ops audio_ops = {
760 .id = CX231XX_AUDIO,
761 .name = "Cx231xx Audio Extension",
762 .init = cx231xx_audio_init,
763 .fini = cx231xx_audio_fini,
764 };
765
766 static int __init cx231xx_alsa_register(void)
767 {
768 return cx231xx_register_extension(&audio_ops);
769 }
770
771 static void __exit cx231xx_alsa_unregister(void)
772 {
773 cx231xx_unregister_extension(&audio_ops);
774 }
775
776 MODULE_LICENSE("GPL");
777 MODULE_AUTHOR("Srinivasa Deevi <srinivasa.deevi@conexant.com>");
778 MODULE_DESCRIPTION("Cx231xx Audio driver");
779
780 module_init(cx231xx_alsa_register);
781 module_exit(cx231xx_alsa_unregister);