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