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