1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * Conexant Cx231xx audio extension
5 * Copyright (C) 2008 <srinivasa.deevi at conexant dot com>
6 * Based on em28xx driver
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>
27 module_param(debug, int, 0644);
28 MODULE_PARM_DESC(debug, "activates debug info");
30 static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;
32 static int cx231xx_isoc_audio_deinit(struct cx231xx *dev)
36 dev_dbg(dev->dev, "Stopping isoc\n");
38 for (i = 0; i < CX231XX_AUDIO_BUFS; i++) {
39 if (dev->adev.urb[i]) {
41 usb_kill_urb(dev->adev.urb[i]);
43 usb_unlink_urb(dev->adev.urb[i]);
45 usb_free_urb(dev->adev.urb[i]);
46 dev->adev.urb[i] = NULL;
48 kfree(dev->adev.transfer_buffer[i]);
49 dev->adev.transfer_buffer[i] = NULL;
56 static int cx231xx_bulk_audio_deinit(struct cx231xx *dev)
60 dev_dbg(dev->dev, "Stopping bulk\n");
62 for (i = 0; i < CX231XX_AUDIO_BUFS; i++) {
63 if (dev->adev.urb[i]) {
65 usb_kill_urb(dev->adev.urb[i]);
67 usb_unlink_urb(dev->adev.urb[i]);
69 usb_free_urb(dev->adev.urb[i]);
70 dev->adev.urb[i] = NULL;
72 kfree(dev->adev.transfer_buffer[i]);
73 dev->adev.transfer_buffer[i] = NULL;
80 static void cx231xx_audio_isocirq(struct urb *urb)
82 struct cx231xx *dev = urb->context;
85 int period_elapsed = 0;
89 struct snd_pcm_substream *substream;
90 struct snd_pcm_runtime *runtime;
92 if (dev->state & DEV_DISCONNECTED)
95 switch (urb->status) {
97 case -ETIMEDOUT: /* NAK */
99 case -ECONNRESET: /* kill */
104 dev_dbg(dev->dev, "urb completion error %d.\n",
109 if (atomic_read(&dev->stream_started) == 0)
112 if (dev->adev.capture_pcm_substream) {
113 substream = dev->adev.capture_pcm_substream;
114 runtime = substream->runtime;
115 stride = runtime->frame_bits >> 3;
117 for (i = 0; i < urb->number_of_packets; i++) {
119 int length = urb->iso_frame_desc[i].actual_length /
121 cp = (unsigned char *)urb->transfer_buffer +
122 urb->iso_frame_desc[i].offset;
127 oldptr = dev->adev.hwptr_done_capture;
128 if (oldptr + length >= runtime->buffer_size) {
131 cnt = runtime->buffer_size - oldptr;
132 memcpy(runtime->dma_area + oldptr * stride, cp,
134 memcpy(runtime->dma_area, cp + cnt * stride,
135 length * stride - cnt * stride);
137 memcpy(runtime->dma_area + oldptr * stride, cp,
141 snd_pcm_stream_lock_irqsave(substream, flags);
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;
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;
156 snd_pcm_stream_unlock_irqrestore(substream, flags);
159 snd_pcm_period_elapsed(substream);
163 status = usb_submit_urb(urb, GFP_ATOMIC);
166 "resubmit of audio urb failed (error=%i)\n",
172 static void cx231xx_audio_bulkirq(struct urb *urb)
174 struct cx231xx *dev = urb->context;
176 int period_elapsed = 0;
180 struct snd_pcm_substream *substream;
181 struct snd_pcm_runtime *runtime;
183 if (dev->state & DEV_DISCONNECTED)
186 switch (urb->status) {
187 case 0: /* success */
188 case -ETIMEDOUT: /* NAK */
190 case -ECONNRESET: /* kill */
195 dev_dbg(dev->dev, "urb completion error %d.\n",
200 if (atomic_read(&dev->stream_started) == 0)
203 if (dev->adev.capture_pcm_substream) {
204 substream = dev->adev.capture_pcm_substream;
205 runtime = substream->runtime;
206 stride = runtime->frame_bits >> 3;
210 int length = urb->actual_length /
212 cp = (unsigned char *)urb->transfer_buffer;
214 oldptr = dev->adev.hwptr_done_capture;
215 if (oldptr + length >= runtime->buffer_size) {
218 cnt = runtime->buffer_size - oldptr;
219 memcpy(runtime->dma_area + oldptr * stride, cp,
221 memcpy(runtime->dma_area, cp + cnt * stride,
222 length * stride - cnt * stride);
224 memcpy(runtime->dma_area + oldptr * stride, cp,
228 snd_pcm_stream_lock_irqsave(substream, flags);
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;
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;
243 snd_pcm_stream_unlock_irqrestore(substream, flags);
246 snd_pcm_period_elapsed(substream);
250 status = usb_submit_urb(urb, GFP_ATOMIC);
253 "resubmit of audio urb failed (error=%i)\n",
259 static int cx231xx_init_audio_isoc(struct cx231xx *dev)
265 "%s: Starting ISO AUDIO transfers\n", __func__);
267 if (dev->state & DEV_DISCONNECTED)
270 sb_size = CX231XX_ISO_NUM_AUDIO_PACKETS * dev->adev.max_pkt_size;
272 for (i = 0; i < CX231XX_AUDIO_BUFS; i++) {
276 dev->adev.transfer_buffer[i] = kmalloc(sb_size, GFP_ATOMIC);
277 if (!dev->adev.transfer_buffer[i])
280 memset(dev->adev.transfer_buffer[i], 0x80, sb_size);
281 urb = usb_alloc_urb(CX231XX_ISO_NUM_AUDIO_PACKETS, GFP_ATOMIC);
283 for (j = 0; j < i; j++) {
284 usb_free_urb(dev->adev.urb[j]);
285 kfree(dev->adev.transfer_buffer[j]);
290 urb->dev = dev->udev;
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];
297 urb->complete = cx231xx_audio_isocirq;
298 urb->number_of_packets = CX231XX_ISO_NUM_AUDIO_PACKETS;
299 urb->transfer_buffer_length = sb_size;
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;
306 dev->adev.urb[i] = urb;
309 for (i = 0; i < CX231XX_AUDIO_BUFS; i++) {
310 errCode = usb_submit_urb(dev->adev.urb[i], GFP_ATOMIC);
312 cx231xx_isoc_audio_deinit(dev);
320 static int cx231xx_init_audio_bulk(struct cx231xx *dev)
326 "%s: Starting BULK AUDIO transfers\n", __func__);
328 if (dev->state & DEV_DISCONNECTED)
331 sb_size = CX231XX_NUM_AUDIO_PACKETS * dev->adev.max_pkt_size;
333 for (i = 0; i < CX231XX_AUDIO_BUFS; i++) {
337 dev->adev.transfer_buffer[i] = kmalloc(sb_size, GFP_ATOMIC);
338 if (!dev->adev.transfer_buffer[i])
341 memset(dev->adev.transfer_buffer[i], 0x80, sb_size);
342 urb = usb_alloc_urb(CX231XX_NUM_AUDIO_PACKETS, GFP_ATOMIC);
344 for (j = 0; j < i; j++) {
345 usb_free_urb(dev->adev.urb[j]);
346 kfree(dev->adev.transfer_buffer[j]);
351 urb->dev = dev->udev;
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;
360 dev->adev.urb[i] = urb;
364 for (i = 0; i < CX231XX_AUDIO_BUFS; i++) {
365 errCode = usb_submit_urb(dev->adev.urb[i], GFP_ATOMIC);
367 cx231xx_bulk_audio_deinit(dev);
375 static int snd_pcm_alloc_vmalloc_buffer(struct snd_pcm_substream *subs,
378 struct snd_pcm_runtime *runtime = subs->runtime;
379 struct cx231xx *dev = snd_pcm_substream_chip(subs);
381 dev_dbg(dev->dev, "Allocating vbuffer\n");
382 if (runtime->dma_area) {
383 if (runtime->dma_bytes > size)
386 vfree(runtime->dma_area);
388 runtime->dma_area = vmalloc(size);
389 if (!runtime->dma_area)
392 runtime->dma_bytes = size;
397 static 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,
403 .formats = SNDRV_PCM_FMTBIT_S16_LE,
405 .rates = SNDRV_PCM_RATE_CONTINUOUS | SNDRV_PCM_RATE_KNOT,
411 .buffer_bytes_max = 62720 * 8, /* just about the value in usbaudio.c */
412 .period_bytes_min = 64, /* 12544/2, */
413 .period_bytes_max = 12544,
415 .periods_max = 98, /* 12544, */
418 static int snd_cx231xx_capture_open(struct snd_pcm_substream *substream)
420 struct cx231xx *dev = snd_pcm_substream_chip(substream);
421 struct snd_pcm_runtime *runtime = substream->runtime;
425 "opening device and trying to acquire exclusive lock\n");
427 if (dev->state & DEV_DISCONNECTED) {
429 "Can't open. the device was removed.\n");
433 /* set alternate setting for audio interface */
434 /* 1 - 48000 samples per sec */
435 mutex_lock(&dev->lock);
437 ret = cx231xx_set_alt_setting(dev, INDEX_AUDIO, 1);
439 ret = cx231xx_set_alt_setting(dev, INDEX_AUDIO, 0);
440 mutex_unlock(&dev->lock);
443 "failed to set alternate setting !\n");
448 runtime->hw = snd_cx231xx_hw_capture;
450 mutex_lock(&dev->lock);
451 /* inform hardware to start streaming */
452 ret = cx231xx_capture_start(dev, 1, Audio);
455 mutex_unlock(&dev->lock);
457 snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS);
458 dev->adev.capture_pcm_substream = substream;
459 runtime->private_data = dev;
464 static int snd_cx231xx_pcm_close(struct snd_pcm_substream *substream)
467 struct cx231xx *dev = snd_pcm_substream_chip(substream);
469 dev_dbg(dev->dev, "closing device\n");
471 /* inform hardware to stop streaming */
472 mutex_lock(&dev->lock);
473 ret = cx231xx_capture_start(dev, 0, Audio);
475 /* set alternate setting for audio interface */
476 /* 1 - 48000 samples per sec */
477 ret = cx231xx_set_alt_setting(dev, INDEX_AUDIO, 0);
480 "failed to set alternate setting !\n");
482 mutex_unlock(&dev->lock);
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;
492 mutex_unlock(&dev->lock);
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);
507 static int snd_cx231xx_hw_capture_params(struct snd_pcm_substream *substream,
508 struct snd_pcm_hw_params *hw_params)
510 struct cx231xx *dev = snd_pcm_substream_chip(substream);
513 dev_dbg(dev->dev, "Setting capture parameters\n");
515 ret = snd_pcm_alloc_vmalloc_buffer(substream,
516 params_buffer_bytes(hw_params));
518 /* TODO: set up cx231xx audio chip to deliver the correct audio format,
519 current default is 48000hz multiplexed => 96000hz mono
520 which shouldn't matter since analogue TV only supports mono */
521 unsigned int channels, rate, format;
523 format = params_format(hw_params);
524 rate = params_rate(hw_params);
525 channels = params_channels(hw_params);
531 static int snd_cx231xx_hw_capture_free(struct snd_pcm_substream *substream)
533 struct cx231xx *dev = snd_pcm_substream_chip(substream);
535 dev_dbg(dev->dev, "Stop capture, if needed\n");
537 if (atomic_read(&dev->stream_started) > 0) {
538 atomic_set(&dev->stream_started, 0);
539 schedule_work(&dev->wq_trigger);
545 static int snd_cx231xx_prepare(struct snd_pcm_substream *substream)
547 struct cx231xx *dev = snd_pcm_substream_chip(substream);
549 dev->adev.hwptr_done_capture = 0;
550 dev->adev.capture_transfer_done = 0;
555 static void audio_trigger(struct work_struct *work)
557 struct cx231xx *dev = container_of(work, struct cx231xx, wq_trigger);
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);
564 cx231xx_init_audio_isoc(dev);
566 cx231xx_init_audio_bulk(dev);
568 dev_dbg(dev->dev, "stopping capture");
569 cx231xx_isoc_audio_deinit(dev);
573 static int snd_cx231xx_capture_trigger(struct snd_pcm_substream *substream,
576 struct cx231xx *dev = snd_pcm_substream_chip(substream);
579 if (dev->state & DEV_DISCONNECTED)
582 spin_lock(&dev->adev.slock);
584 case SNDRV_PCM_TRIGGER_START:
585 atomic_set(&dev->stream_started, 1);
587 case SNDRV_PCM_TRIGGER_STOP:
588 atomic_set(&dev->stream_started, 0);
594 spin_unlock(&dev->adev.slock);
596 schedule_work(&dev->wq_trigger);
601 static snd_pcm_uframes_t snd_cx231xx_capture_pointer(struct snd_pcm_substream
606 snd_pcm_uframes_t hwptr_done;
608 dev = snd_pcm_substream_chip(substream);
610 spin_lock_irqsave(&dev->adev.slock, flags);
611 hwptr_done = dev->adev.hwptr_done_capture;
612 spin_unlock_irqrestore(&dev->adev.slock, flags);
617 static struct page *snd_pcm_get_vmalloc_page(struct snd_pcm_substream *subs,
618 unsigned long offset)
620 void *pageptr = subs->runtime->dma_area + offset;
622 return vmalloc_to_page(pageptr);
625 static 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,
637 static int cx231xx_audio_init(struct cx231xx *dev)
639 struct cx231xx_audio *adev = &dev->adev;
641 struct snd_card *card;
644 struct usb_interface *uif;
645 int i, isoc_pipe = 0;
647 if (dev->has_alsa_audio != 1) {
648 /* This device does not support the extension (in this case
649 the device is expecting the snd-usb-audio module or
650 doesn't have analog audio support at all) */
655 "probing for cx231xx non standard usbaudio\n");
657 err = snd_card_new(dev->dev, index[devnr], "Cx231xx Audio",
658 THIS_MODULE, 0, &card);
662 spin_lock_init(&adev->slock);
663 err = snd_pcm_new(card, "Cx231xx Audio", 0, 0, 1, &pcm);
667 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE,
668 &snd_cx231xx_pcm_capture);
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));
676 INIT_WORK(&dev->wq_trigger, audio_trigger);
678 err = snd_card_register(card);
682 adev->sndcard = card;
683 adev->udev = dev->udev;
685 /* compute alternate max packet sizes for Audio */
687 dev->udev->actconfig->interface[dev->current_pcb_config.
688 hs_config_info[0].interface_info.
691 if (uif->altsetting[0].desc.bNumEndpoints < isoc_pipe + 1) {
696 adev->end_point_addr =
697 uif->altsetting[0].endpoint[isoc_pipe].desc.
700 adev->num_alt = uif->num_altsetting;
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) {
710 for (i = 0; i < adev->num_alt; i++) {
713 if (uif->altsetting[i].desc.bNumEndpoints < isoc_pipe + 1) {
715 goto err_free_pkt_size;
718 tmp = le16_to_cpu(uif->altsetting[i].endpoint[isoc_pipe].desc.
720 adev->alt_max_pkt_size[i] =
721 (tmp & 0x07ff) * (((tmp & 0x1800) >> 11) + 1);
723 "audio alternate setting %i, max size= %i\n", i,
724 adev->alt_max_pkt_size[i]);
730 kfree(adev->alt_max_pkt_size);
737 static int cx231xx_audio_fini(struct cx231xx *dev)
742 if (dev->has_alsa_audio != 1) {
743 /* This device does not support the extension (in this case
744 the device is expecting the snd-usb-audio module or
745 doesn't have analog audio support at all) */
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;
758 static struct cx231xx_ops audio_ops = {
760 .name = "Cx231xx Audio Extension",
761 .init = cx231xx_audio_init,
762 .fini = cx231xx_audio_fini,
765 static int __init cx231xx_alsa_register(void)
767 return cx231xx_register_extension(&audio_ops);
770 static void __exit cx231xx_alsa_unregister(void)
772 cx231xx_unregister_extension(&audio_ops);
775 MODULE_LICENSE("GPL");
776 MODULE_AUTHOR("Srinivasa Deevi <srinivasa.deevi@conexant.com>");
777 MODULE_DESCRIPTION("Cx231xx Audio driver");
779 module_init(cx231xx_alsa_register);
780 module_exit(cx231xx_alsa_unregister);