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