2 * Conexant Cx231xx audio extension
4 * Copyright (C) 2008 <srinivasa.deevi at conexant dot com>
5 * Based on em28xx driver
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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>
42 module_param(debug, int, 0644);
43 MODULE_PARM_DESC(debug, "activates debug info");
45 static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;
47 static int cx231xx_isoc_audio_deinit(struct cx231xx *dev)
51 dev_dbg(dev->dev, "Stopping isoc\n");
53 for (i = 0; i < CX231XX_AUDIO_BUFS; i++) {
54 if (dev->adev.urb[i]) {
56 usb_kill_urb(dev->adev.urb[i]);
58 usb_unlink_urb(dev->adev.urb[i]);
60 usb_free_urb(dev->adev.urb[i]);
61 dev->adev.urb[i] = NULL;
63 kfree(dev->adev.transfer_buffer[i]);
64 dev->adev.transfer_buffer[i] = NULL;
71 static int cx231xx_bulk_audio_deinit(struct cx231xx *dev)
75 dev_dbg(dev->dev, "Stopping bulk\n");
77 for (i = 0; i < CX231XX_AUDIO_BUFS; i++) {
78 if (dev->adev.urb[i]) {
80 usb_kill_urb(dev->adev.urb[i]);
82 usb_unlink_urb(dev->adev.urb[i]);
84 usb_free_urb(dev->adev.urb[i]);
85 dev->adev.urb[i] = NULL;
87 kfree(dev->adev.transfer_buffer[i]);
88 dev->adev.transfer_buffer[i] = NULL;
95 static void cx231xx_audio_isocirq(struct urb *urb)
97 struct cx231xx *dev = urb->context;
100 int period_elapsed = 0;
104 struct snd_pcm_substream *substream;
105 struct snd_pcm_runtime *runtime;
107 if (dev->state & DEV_DISCONNECTED)
110 switch (urb->status) {
111 case 0: /* success */
112 case -ETIMEDOUT: /* NAK */
114 case -ECONNRESET: /* kill */
119 dev_dbg(dev->dev, "urb completition error %d.\n",
124 if (atomic_read(&dev->stream_started) == 0)
127 if (dev->adev.capture_pcm_substream) {
128 substream = dev->adev.capture_pcm_substream;
129 runtime = substream->runtime;
130 stride = runtime->frame_bits >> 3;
132 for (i = 0; i < urb->number_of_packets; i++) {
133 int length = urb->iso_frame_desc[i].actual_length /
135 cp = (unsigned char *)urb->transfer_buffer +
136 urb->iso_frame_desc[i].offset;
141 oldptr = dev->adev.hwptr_done_capture;
142 if (oldptr + length >= runtime->buffer_size) {
145 cnt = runtime->buffer_size - oldptr;
146 memcpy(runtime->dma_area + oldptr * stride, cp,
148 memcpy(runtime->dma_area, cp + cnt * stride,
149 length * stride - cnt * stride);
151 memcpy(runtime->dma_area + oldptr * stride, cp,
155 snd_pcm_stream_lock(substream);
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;
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;
170 snd_pcm_stream_unlock(substream);
173 snd_pcm_period_elapsed(substream);
177 status = usb_submit_urb(urb, GFP_ATOMIC);
180 "resubmit of audio urb failed (error=%i)\n",
186 static void cx231xx_audio_bulkirq(struct urb *urb)
188 struct cx231xx *dev = urb->context;
190 int period_elapsed = 0;
194 struct snd_pcm_substream *substream;
195 struct snd_pcm_runtime *runtime;
197 if (dev->state & DEV_DISCONNECTED)
200 switch (urb->status) {
201 case 0: /* success */
202 case -ETIMEDOUT: /* NAK */
204 case -ECONNRESET: /* kill */
209 dev_dbg(dev->dev, "urb completition error %d.\n",
214 if (atomic_read(&dev->stream_started) == 0)
217 if (dev->adev.capture_pcm_substream) {
218 substream = dev->adev.capture_pcm_substream;
219 runtime = substream->runtime;
220 stride = runtime->frame_bits >> 3;
223 int length = urb->actual_length /
225 cp = (unsigned char *)urb->transfer_buffer;
227 oldptr = dev->adev.hwptr_done_capture;
228 if (oldptr + length >= runtime->buffer_size) {
231 cnt = runtime->buffer_size - oldptr;
232 memcpy(runtime->dma_area + oldptr * stride, cp,
234 memcpy(runtime->dma_area, cp + cnt * stride,
235 length * stride - cnt * stride);
237 memcpy(runtime->dma_area + oldptr * stride, cp,
241 snd_pcm_stream_lock(substream);
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;
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;
256 snd_pcm_stream_unlock(substream);
259 snd_pcm_period_elapsed(substream);
263 status = usb_submit_urb(urb, GFP_ATOMIC);
266 "resubmit of audio urb failed (error=%i)\n",
272 static int cx231xx_init_audio_isoc(struct cx231xx *dev)
278 "%s: Starting ISO AUDIO transfers\n", __func__);
280 if (dev->state & DEV_DISCONNECTED)
283 sb_size = CX231XX_ISO_NUM_AUDIO_PACKETS * dev->adev.max_pkt_size;
285 for (i = 0; i < CX231XX_AUDIO_BUFS; i++) {
289 dev->adev.transfer_buffer[i] = kmalloc(sb_size, GFP_ATOMIC);
290 if (!dev->adev.transfer_buffer[i])
293 memset(dev->adev.transfer_buffer[i], 0x80, sb_size);
294 urb = usb_alloc_urb(CX231XX_ISO_NUM_AUDIO_PACKETS, GFP_ATOMIC);
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]);
304 urb->dev = dev->udev;
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];
311 urb->complete = cx231xx_audio_isocirq;
312 urb->number_of_packets = CX231XX_ISO_NUM_AUDIO_PACKETS;
313 urb->transfer_buffer_length = sb_size;
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;
320 dev->adev.urb[i] = urb;
323 for (i = 0; i < CX231XX_AUDIO_BUFS; i++) {
324 errCode = usb_submit_urb(dev->adev.urb[i], GFP_ATOMIC);
326 cx231xx_isoc_audio_deinit(dev);
334 static int cx231xx_init_audio_bulk(struct cx231xx *dev)
340 "%s: Starting BULK AUDIO transfers\n", __func__);
342 if (dev->state & DEV_DISCONNECTED)
345 sb_size = CX231XX_NUM_AUDIO_PACKETS * dev->adev.max_pkt_size;
347 for (i = 0; i < CX231XX_AUDIO_BUFS; i++) {
351 dev->adev.transfer_buffer[i] = kmalloc(sb_size, GFP_ATOMIC);
352 if (!dev->adev.transfer_buffer[i])
355 memset(dev->adev.transfer_buffer[i], 0x80, sb_size);
356 urb = usb_alloc_urb(CX231XX_NUM_AUDIO_PACKETS, GFP_ATOMIC);
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]);
366 urb->dev = dev->udev;
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;
375 dev->adev.urb[i] = urb;
379 for (i = 0; i < CX231XX_AUDIO_BUFS; i++) {
380 errCode = usb_submit_urb(dev->adev.urb[i], GFP_ATOMIC);
382 cx231xx_bulk_audio_deinit(dev);
390 static int snd_pcm_alloc_vmalloc_buffer(struct snd_pcm_substream *subs,
393 struct snd_pcm_runtime *runtime = subs->runtime;
394 struct cx231xx *dev = snd_pcm_substream_chip(subs);
396 dev_dbg(dev->dev, "Allocating vbuffer\n");
397 if (runtime->dma_area) {
398 if (runtime->dma_bytes > size)
401 vfree(runtime->dma_area);
403 runtime->dma_area = vmalloc(size);
404 if (!runtime->dma_area)
407 runtime->dma_bytes = size;
412 static 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,
418 .formats = SNDRV_PCM_FMTBIT_S16_LE,
420 .rates = SNDRV_PCM_RATE_CONTINUOUS | SNDRV_PCM_RATE_KNOT,
426 .buffer_bytes_max = 62720 * 8, /* just about the value in usbaudio.c */
427 .period_bytes_min = 64, /* 12544/2, */
428 .period_bytes_max = 12544,
430 .periods_max = 98, /* 12544, */
433 static int snd_cx231xx_capture_open(struct snd_pcm_substream *substream)
435 struct cx231xx *dev = snd_pcm_substream_chip(substream);
436 struct snd_pcm_runtime *runtime = substream->runtime;
440 "opening device and trying to acquire exclusive lock\n");
442 if (dev->state & DEV_DISCONNECTED) {
444 "Can't open. the device was removed.\n");
448 /* set alternate setting for audio interface */
449 /* 1 - 48000 samples per sec */
450 mutex_lock(&dev->lock);
452 ret = cx231xx_set_alt_setting(dev, INDEX_AUDIO, 1);
454 ret = cx231xx_set_alt_setting(dev, INDEX_AUDIO, 0);
455 mutex_unlock(&dev->lock);
458 "failed to set alternate setting !\n");
463 runtime->hw = snd_cx231xx_hw_capture;
465 mutex_lock(&dev->lock);
466 /* inform hardware to start streaming */
467 ret = cx231xx_capture_start(dev, 1, Audio);
470 mutex_unlock(&dev->lock);
472 snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS);
473 dev->adev.capture_pcm_substream = substream;
474 runtime->private_data = dev;
479 static int snd_cx231xx_pcm_close(struct snd_pcm_substream *substream)
482 struct cx231xx *dev = snd_pcm_substream_chip(substream);
484 dev_dbg(dev->dev, "closing device\n");
486 /* inform hardware to stop streaming */
487 mutex_lock(&dev->lock);
488 ret = cx231xx_capture_start(dev, 0, Audio);
490 /* set alternate setting for audio interface */
491 /* 1 - 48000 samples per sec */
492 ret = cx231xx_set_alt_setting(dev, INDEX_AUDIO, 0);
495 "failed to set alternate setting !\n");
497 mutex_unlock(&dev->lock);
502 mutex_unlock(&dev->lock);
504 if (dev->adev.users == 0 && dev->adev.shutdown == 1) {
505 dev_dbg(dev->dev, "audio users: %d\n", dev->adev.users);
506 dev_dbg(dev->dev, "disabling audio stream!\n");
507 dev->adev.shutdown = 0;
508 dev_dbg(dev->dev, "released lock\n");
509 if (atomic_read(&dev->stream_started) > 0) {
510 atomic_set(&dev->stream_started, 0);
511 schedule_work(&dev->wq_trigger);
517 static int snd_cx231xx_hw_capture_params(struct snd_pcm_substream *substream,
518 struct snd_pcm_hw_params *hw_params)
520 struct cx231xx *dev = snd_pcm_substream_chip(substream);
523 dev_dbg(dev->dev, "Setting capture parameters\n");
525 ret = snd_pcm_alloc_vmalloc_buffer(substream,
526 params_buffer_bytes(hw_params));
528 /* TODO: set up cx231xx audio chip to deliver the correct audio format,
529 current default is 48000hz multiplexed => 96000hz mono
530 which shouldn't matter since analogue TV only supports mono */
531 unsigned int channels, rate, format;
533 format = params_format(hw_params);
534 rate = params_rate(hw_params);
535 channels = params_channels(hw_params);
541 static int snd_cx231xx_hw_capture_free(struct snd_pcm_substream *substream)
543 struct cx231xx *dev = snd_pcm_substream_chip(substream);
545 dev_dbg(dev->dev, "Stop capture, if needed\n");
547 if (atomic_read(&dev->stream_started) > 0) {
548 atomic_set(&dev->stream_started, 0);
549 schedule_work(&dev->wq_trigger);
555 static int snd_cx231xx_prepare(struct snd_pcm_substream *substream)
557 struct cx231xx *dev = snd_pcm_substream_chip(substream);
559 dev->adev.hwptr_done_capture = 0;
560 dev->adev.capture_transfer_done = 0;
565 static void audio_trigger(struct work_struct *work)
567 struct cx231xx *dev = container_of(work, struct cx231xx, wq_trigger);
569 if (atomic_read(&dev->stream_started)) {
570 dev_dbg(dev->dev, "starting capture");
571 if (is_fw_load(dev) == 0)
572 cx25840_call(dev, core, load_fw);
574 cx231xx_init_audio_isoc(dev);
576 cx231xx_init_audio_bulk(dev);
578 dev_dbg(dev->dev, "stopping capture");
579 cx231xx_isoc_audio_deinit(dev);
583 static int snd_cx231xx_capture_trigger(struct snd_pcm_substream *substream,
586 struct cx231xx *dev = snd_pcm_substream_chip(substream);
589 if (dev->state & DEV_DISCONNECTED)
592 spin_lock(&dev->adev.slock);
594 case SNDRV_PCM_TRIGGER_START:
595 atomic_set(&dev->stream_started, 1);
597 case SNDRV_PCM_TRIGGER_STOP:
598 atomic_set(&dev->stream_started, 0);
604 spin_unlock(&dev->adev.slock);
606 schedule_work(&dev->wq_trigger);
611 static snd_pcm_uframes_t snd_cx231xx_capture_pointer(struct snd_pcm_substream
616 snd_pcm_uframes_t hwptr_done;
618 dev = snd_pcm_substream_chip(substream);
620 spin_lock_irqsave(&dev->adev.slock, flags);
621 hwptr_done = dev->adev.hwptr_done_capture;
622 spin_unlock_irqrestore(&dev->adev.slock, flags);
627 static struct page *snd_pcm_get_vmalloc_page(struct snd_pcm_substream *subs,
628 unsigned long offset)
630 void *pageptr = subs->runtime->dma_area + offset;
632 return vmalloc_to_page(pageptr);
635 static struct snd_pcm_ops snd_cx231xx_pcm_capture = {
636 .open = snd_cx231xx_capture_open,
637 .close = snd_cx231xx_pcm_close,
638 .ioctl = snd_pcm_lib_ioctl,
639 .hw_params = snd_cx231xx_hw_capture_params,
640 .hw_free = snd_cx231xx_hw_capture_free,
641 .prepare = snd_cx231xx_prepare,
642 .trigger = snd_cx231xx_capture_trigger,
643 .pointer = snd_cx231xx_capture_pointer,
644 .page = snd_pcm_get_vmalloc_page,
647 static int cx231xx_audio_init(struct cx231xx *dev)
649 struct cx231xx_audio *adev = &dev->adev;
651 struct snd_card *card;
654 struct usb_interface *uif;
655 int i, isoc_pipe = 0;
657 if (dev->has_alsa_audio != 1) {
658 /* This device does not support the extension (in this case
659 the device is expecting the snd-usb-audio module or
660 doesn't have analog audio support at all) */
665 "probing for cx231xx non standard usbaudio\n");
667 err = snd_card_new(dev->dev, index[devnr], "Cx231xx Audio",
668 THIS_MODULE, 0, &card);
672 spin_lock_init(&adev->slock);
673 err = snd_pcm_new(card, "Cx231xx Audio", 0, 0, 1, &pcm);
677 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE,
678 &snd_cx231xx_pcm_capture);
680 pcm->private_data = dev;
681 strcpy(pcm->name, "Conexant cx231xx Capture");
682 strcpy(card->driver, "Cx231xx-Audio");
683 strcpy(card->shortname, "Cx231xx Audio");
684 strcpy(card->longname, "Conexant cx231xx Audio");
686 INIT_WORK(&dev->wq_trigger, audio_trigger);
688 err = snd_card_register(card);
692 adev->sndcard = card;
693 adev->udev = dev->udev;
695 /* compute alternate max packet sizes for Audio */
697 dev->udev->actconfig->interface[dev->current_pcb_config.
698 hs_config_info[0].interface_info.
701 if (uif->altsetting[0].desc.bNumEndpoints < isoc_pipe + 1) {
706 adev->end_point_addr =
707 uif->altsetting[0].endpoint[isoc_pipe].desc.
710 adev->num_alt = uif->num_altsetting;
712 "audio EndPoint Addr 0x%x, Alternate settings: %i\n",
713 adev->end_point_addr, adev->num_alt);
714 adev->alt_max_pkt_size = kmalloc(32 * adev->num_alt, GFP_KERNEL);
715 if (!adev->alt_max_pkt_size) {
720 for (i = 0; i < adev->num_alt; i++) {
723 if (uif->altsetting[i].desc.bNumEndpoints < isoc_pipe + 1) {
725 goto err_free_pkt_size;
728 tmp = le16_to_cpu(uif->altsetting[i].endpoint[isoc_pipe].desc.
730 adev->alt_max_pkt_size[i] =
731 (tmp & 0x07ff) * (((tmp & 0x1800) >> 11) + 1);
733 "audio alternate setting %i, max size= %i\n", i,
734 adev->alt_max_pkt_size[i]);
740 kfree(adev->alt_max_pkt_size);
747 static int cx231xx_audio_fini(struct cx231xx *dev)
752 if (dev->has_alsa_audio != 1) {
753 /* This device does not support the extension (in this case
754 the device is expecting the snd-usb-audio module or
755 doesn't have analog audio support at all) */
759 if (dev->adev.sndcard) {
760 snd_card_free(dev->adev.sndcard);
761 kfree(dev->adev.alt_max_pkt_size);
762 dev->adev.sndcard = NULL;
768 static struct cx231xx_ops audio_ops = {
770 .name = "Cx231xx Audio Extension",
771 .init = cx231xx_audio_init,
772 .fini = cx231xx_audio_fini,
775 static int __init cx231xx_alsa_register(void)
777 return cx231xx_register_extension(&audio_ops);
780 static void __exit cx231xx_alsa_unregister(void)
782 cx231xx_unregister_extension(&audio_ops);
785 MODULE_LICENSE("GPL");
786 MODULE_AUTHOR("Srinivasa Deevi <srinivasa.deevi@conexant.com>");
787 MODULE_DESCRIPTION("Cx231xx Audio driver");
789 module_init(cx231xx_alsa_register);
790 module_exit(cx231xx_alsa_unregister);