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.
23 #include <linux/kernel.h>
24 #include <linux/usb.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>
43 module_param(debug, int, 0644);
44 MODULE_PARM_DESC(debug, "activates debug info");
46 #define dprintk(fmt, arg...) do { \
48 printk(KERN_INFO "cx231xx-audio %s: " fmt, \
52 static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;
54 static int cx231xx_isoc_audio_deinit(struct cx231xx *dev)
58 dprintk("Stopping isoc\n");
60 for (i = 0; i < CX231XX_AUDIO_BUFS; i++) {
61 if (dev->adev.urb[i]) {
63 usb_kill_urb(dev->adev.urb[i]);
65 usb_unlink_urb(dev->adev.urb[i]);
67 usb_free_urb(dev->adev.urb[i]);
68 dev->adev.urb[i] = NULL;
70 kfree(dev->adev.transfer_buffer[i]);
71 dev->adev.transfer_buffer[i] = NULL;
78 static int cx231xx_bulk_audio_deinit(struct cx231xx *dev)
82 dprintk("Stopping bulk\n");
84 for (i = 0; i < CX231XX_AUDIO_BUFS; i++) {
85 if (dev->adev.urb[i]) {
87 usb_kill_urb(dev->adev.urb[i]);
89 usb_unlink_urb(dev->adev.urb[i]);
91 usb_free_urb(dev->adev.urb[i]);
92 dev->adev.urb[i] = NULL;
94 kfree(dev->adev.transfer_buffer[i]);
95 dev->adev.transfer_buffer[i] = NULL;
102 static void cx231xx_audio_isocirq(struct urb *urb)
104 struct cx231xx *dev = urb->context;
107 int period_elapsed = 0;
111 struct snd_pcm_substream *substream;
112 struct snd_pcm_runtime *runtime;
114 if (dev->state & DEV_DISCONNECTED)
117 switch (urb->status) {
118 case 0: /* success */
119 case -ETIMEDOUT: /* NAK */
121 case -ECONNRESET: /* kill */
126 dprintk("urb completition error %d.\n", urb->status);
130 if (atomic_read(&dev->stream_started) == 0)
133 if (dev->adev.capture_pcm_substream) {
134 substream = dev->adev.capture_pcm_substream;
135 runtime = substream->runtime;
136 stride = runtime->frame_bits >> 3;
138 for (i = 0; i < urb->number_of_packets; i++) {
139 int length = urb->iso_frame_desc[i].actual_length /
141 cp = (unsigned char *)urb->transfer_buffer +
142 urb->iso_frame_desc[i].offset;
147 oldptr = dev->adev.hwptr_done_capture;
148 if (oldptr + length >= runtime->buffer_size) {
151 cnt = runtime->buffer_size - oldptr;
152 memcpy(runtime->dma_area + oldptr * stride, cp,
154 memcpy(runtime->dma_area, cp + cnt * stride,
155 length * stride - cnt * stride);
157 memcpy(runtime->dma_area + oldptr * stride, cp,
161 snd_pcm_stream_lock(substream);
163 dev->adev.hwptr_done_capture += length;
164 if (dev->adev.hwptr_done_capture >=
165 runtime->buffer_size)
166 dev->adev.hwptr_done_capture -=
167 runtime->buffer_size;
169 dev->adev.capture_transfer_done += length;
170 if (dev->adev.capture_transfer_done >=
171 runtime->period_size) {
172 dev->adev.capture_transfer_done -=
173 runtime->period_size;
176 snd_pcm_stream_unlock(substream);
179 snd_pcm_period_elapsed(substream);
183 status = usb_submit_urb(urb, GFP_ATOMIC);
185 cx231xx_errdev("resubmit of audio urb failed (error=%i)\n",
191 static void cx231xx_audio_bulkirq(struct urb *urb)
193 struct cx231xx *dev = urb->context;
195 int period_elapsed = 0;
199 struct snd_pcm_substream *substream;
200 struct snd_pcm_runtime *runtime;
202 if (dev->state & DEV_DISCONNECTED)
205 switch (urb->status) {
206 case 0: /* success */
207 case -ETIMEDOUT: /* NAK */
209 case -ECONNRESET: /* kill */
214 dprintk("urb completition error %d.\n", urb->status);
218 if (atomic_read(&dev->stream_started) == 0)
221 if (dev->adev.capture_pcm_substream) {
222 substream = dev->adev.capture_pcm_substream;
223 runtime = substream->runtime;
224 stride = runtime->frame_bits >> 3;
227 int length = urb->actual_length /
229 cp = (unsigned char *)urb->transfer_buffer;
231 oldptr = dev->adev.hwptr_done_capture;
232 if (oldptr + length >= runtime->buffer_size) {
235 cnt = runtime->buffer_size - oldptr;
236 memcpy(runtime->dma_area + oldptr * stride, cp,
238 memcpy(runtime->dma_area, cp + cnt * stride,
239 length * stride - cnt * stride);
241 memcpy(runtime->dma_area + oldptr * stride, cp,
245 snd_pcm_stream_lock(substream);
247 dev->adev.hwptr_done_capture += length;
248 if (dev->adev.hwptr_done_capture >=
249 runtime->buffer_size)
250 dev->adev.hwptr_done_capture -=
251 runtime->buffer_size;
253 dev->adev.capture_transfer_done += length;
254 if (dev->adev.capture_transfer_done >=
255 runtime->period_size) {
256 dev->adev.capture_transfer_done -=
257 runtime->period_size;
260 snd_pcm_stream_unlock(substream);
263 snd_pcm_period_elapsed(substream);
267 status = usb_submit_urb(urb, GFP_ATOMIC);
269 cx231xx_errdev("resubmit of audio urb failed (error=%i)\n",
275 static int cx231xx_init_audio_isoc(struct cx231xx *dev)
280 cx231xx_info("%s: Starting ISO AUDIO transfers\n", __func__);
282 if (dev->state & DEV_DISCONNECTED)
285 sb_size = CX231XX_ISO_NUM_AUDIO_PACKETS * dev->adev.max_pkt_size;
287 for (i = 0; i < CX231XX_AUDIO_BUFS; i++) {
291 dev->adev.transfer_buffer[i] = kmalloc(sb_size, GFP_ATOMIC);
292 if (!dev->adev.transfer_buffer[i])
295 memset(dev->adev.transfer_buffer[i], 0x80, sb_size);
296 urb = usb_alloc_urb(CX231XX_ISO_NUM_AUDIO_PACKETS, GFP_ATOMIC);
298 cx231xx_errdev("usb_alloc_urb failed!\n");
299 for (j = 0; j < i; j++) {
300 usb_free_urb(dev->adev.urb[j]);
301 kfree(dev->adev.transfer_buffer[j]);
306 urb->dev = dev->udev;
308 urb->pipe = usb_rcvisocpipe(dev->udev,
309 dev->adev.end_point_addr);
310 urb->transfer_flags = URB_ISO_ASAP | URB_NO_TRANSFER_DMA_MAP;
311 urb->transfer_buffer = dev->adev.transfer_buffer[i];
313 urb->complete = cx231xx_audio_isocirq;
314 urb->number_of_packets = CX231XX_ISO_NUM_AUDIO_PACKETS;
315 urb->transfer_buffer_length = sb_size;
317 for (j = k = 0; j < CX231XX_ISO_NUM_AUDIO_PACKETS;
318 j++, k += dev->adev.max_pkt_size) {
319 urb->iso_frame_desc[j].offset = k;
320 urb->iso_frame_desc[j].length = dev->adev.max_pkt_size;
322 dev->adev.urb[i] = urb;
325 for (i = 0; i < CX231XX_AUDIO_BUFS; i++) {
326 errCode = usb_submit_urb(dev->adev.urb[i], GFP_ATOMIC);
328 cx231xx_isoc_audio_deinit(dev);
336 static int cx231xx_init_audio_bulk(struct cx231xx *dev)
341 cx231xx_info("%s: Starting BULK AUDIO transfers\n", __func__);
343 if (dev->state & DEV_DISCONNECTED)
346 sb_size = CX231XX_NUM_AUDIO_PACKETS * dev->adev.max_pkt_size;
348 for (i = 0; i < CX231XX_AUDIO_BUFS; i++) {
352 dev->adev.transfer_buffer[i] = kmalloc(sb_size, GFP_ATOMIC);
353 if (!dev->adev.transfer_buffer[i])
356 memset(dev->adev.transfer_buffer[i], 0x80, sb_size);
357 urb = usb_alloc_urb(CX231XX_NUM_AUDIO_PACKETS, GFP_ATOMIC);
359 cx231xx_errdev("usb_alloc_urb failed!\n");
360 for (j = 0; j < i; j++) {
361 usb_free_urb(dev->adev.urb[j]);
362 kfree(dev->adev.transfer_buffer[j]);
367 urb->dev = dev->udev;
369 urb->pipe = usb_rcvbulkpipe(dev->udev,
370 dev->adev.end_point_addr);
371 urb->transfer_flags = URB_NO_TRANSFER_DMA_MAP;
372 urb->transfer_buffer = dev->adev.transfer_buffer[i];
373 urb->complete = cx231xx_audio_bulkirq;
374 urb->transfer_buffer_length = sb_size;
376 dev->adev.urb[i] = urb;
380 for (i = 0; i < CX231XX_AUDIO_BUFS; i++) {
381 errCode = usb_submit_urb(dev->adev.urb[i], GFP_ATOMIC);
383 cx231xx_bulk_audio_deinit(dev);
391 static int snd_pcm_alloc_vmalloc_buffer(struct snd_pcm_substream *subs,
394 struct snd_pcm_runtime *runtime = subs->runtime;
396 dprintk("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;
439 dprintk("opening device and trying to acquire exclusive lock\n");
442 cx231xx_errdev("BUG: cx231xx can't find device struct."
443 " Can't proceed with open\n");
447 if (dev->state & DEV_DISCONNECTED) {
448 cx231xx_errdev("Can't open. the device was removed.\n");
452 /* Sets volume, mute, etc */
455 /* set alternate setting for audio interface */
456 /* 1 - 48000 samples per sec */
457 mutex_lock(&dev->lock);
459 ret = cx231xx_set_alt_setting(dev, INDEX_AUDIO, 1);
461 ret = cx231xx_set_alt_setting(dev, INDEX_AUDIO, 0);
462 mutex_unlock(&dev->lock);
464 cx231xx_errdev("failed to set alternate setting !\n");
469 runtime->hw = snd_cx231xx_hw_capture;
471 mutex_lock(&dev->lock);
472 /* inform hardware to start streaming */
473 ret = cx231xx_capture_start(dev, 1, Audio);
476 mutex_unlock(&dev->lock);
478 snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS);
479 dev->adev.capture_pcm_substream = substream;
480 runtime->private_data = dev;
485 static int snd_cx231xx_pcm_close(struct snd_pcm_substream *substream)
488 struct cx231xx *dev = snd_pcm_substream_chip(substream);
490 dprintk("closing device\n");
492 /* inform hardware to stop streaming */
493 mutex_lock(&dev->lock);
494 ret = cx231xx_capture_start(dev, 0, Audio);
496 /* set alternate setting for audio interface */
497 /* 1 - 48000 samples per sec */
498 ret = cx231xx_set_alt_setting(dev, INDEX_AUDIO, 0);
500 cx231xx_errdev("failed to set alternate setting !\n");
502 mutex_unlock(&dev->lock);
508 mutex_unlock(&dev->lock);
510 if (dev->adev.users == 0 && dev->adev.shutdown == 1) {
511 dprintk("audio users: %d\n", dev->adev.users);
512 dprintk("disabling audio stream!\n");
513 dev->adev.shutdown = 0;
514 dprintk("released lock\n");
515 if (atomic_read(&dev->stream_started) > 0) {
516 atomic_set(&dev->stream_started, 0);
517 schedule_work(&dev->wq_trigger);
523 static int snd_cx231xx_hw_capture_params(struct snd_pcm_substream *substream,
524 struct snd_pcm_hw_params *hw_params)
528 dprintk("Setting capture parameters\n");
530 ret = snd_pcm_alloc_vmalloc_buffer(substream,
531 params_buffer_bytes(hw_params));
533 /* TODO: set up cx231xx audio chip to deliver the correct audio format,
534 current default is 48000hz multiplexed => 96000hz mono
535 which shouldn't matter since analogue TV only supports mono */
536 unsigned int channels, rate, format;
538 format = params_format(hw_params);
539 rate = params_rate(hw_params);
540 channels = params_channels(hw_params);
546 static int snd_cx231xx_hw_capture_free(struct snd_pcm_substream *substream)
548 struct cx231xx *dev = snd_pcm_substream_chip(substream);
550 dprintk("Stop capture, if needed\n");
552 if (atomic_read(&dev->stream_started) > 0) {
553 atomic_set(&dev->stream_started, 0);
554 schedule_work(&dev->wq_trigger);
560 static int snd_cx231xx_prepare(struct snd_pcm_substream *substream)
562 struct cx231xx *dev = snd_pcm_substream_chip(substream);
564 dev->adev.hwptr_done_capture = 0;
565 dev->adev.capture_transfer_done = 0;
570 static void audio_trigger(struct work_struct *work)
572 struct cx231xx *dev = container_of(work, struct cx231xx, wq_trigger);
574 if (atomic_read(&dev->stream_started)) {
575 dprintk("starting capture");
576 if (is_fw_load(dev) == 0)
577 cx25840_call(dev, core, load_fw);
579 cx231xx_init_audio_isoc(dev);
581 cx231xx_init_audio_bulk(dev);
583 dprintk("stopping capture");
584 cx231xx_isoc_audio_deinit(dev);
588 static int snd_cx231xx_capture_trigger(struct snd_pcm_substream *substream,
591 struct cx231xx *dev = snd_pcm_substream_chip(substream);
594 if (dev->state & DEV_DISCONNECTED)
597 spin_lock(&dev->adev.slock);
599 case SNDRV_PCM_TRIGGER_START:
600 atomic_set(&dev->stream_started, 1);
602 case SNDRV_PCM_TRIGGER_STOP:
603 atomic_set(&dev->stream_started, 0);
609 spin_unlock(&dev->adev.slock);
611 schedule_work(&dev->wq_trigger);
616 static snd_pcm_uframes_t snd_cx231xx_capture_pointer(struct snd_pcm_substream
621 snd_pcm_uframes_t hwptr_done;
623 dev = snd_pcm_substream_chip(substream);
625 spin_lock_irqsave(&dev->adev.slock, flags);
626 hwptr_done = dev->adev.hwptr_done_capture;
627 spin_unlock_irqrestore(&dev->adev.slock, flags);
632 static struct page *snd_pcm_get_vmalloc_page(struct snd_pcm_substream *subs,
633 unsigned long offset)
635 void *pageptr = subs->runtime->dma_area + offset;
637 return vmalloc_to_page(pageptr);
640 static 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,
652 static int cx231xx_audio_init(struct cx231xx *dev)
654 struct cx231xx_audio *adev = &dev->adev;
656 struct snd_card *card;
659 struct usb_interface *uif;
660 int i, isoc_pipe = 0;
662 if (dev->has_alsa_audio != 1) {
663 /* This device does not support the extension (in this case
664 the device is expecting the snd-usb-audio module or
665 doesn't have analog audio support at all) */
669 cx231xx_info("cx231xx-audio.c: probing for cx231xx "
670 "non standard usbaudio\n");
672 err = snd_card_create(index[devnr], "Cx231xx Audio", THIS_MODULE,
677 spin_lock_init(&adev->slock);
678 err = snd_pcm_new(card, "Cx231xx Audio", 0, 0, 1, &pcm);
684 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE,
685 &snd_cx231xx_pcm_capture);
687 pcm->private_data = dev;
688 strcpy(pcm->name, "Conexant cx231xx Capture");
689 snd_card_set_dev(card, &dev->udev->dev);
690 strcpy(card->driver, "Cx231xx-Audio");
691 strcpy(card->shortname, "Cx231xx Audio");
692 strcpy(card->longname, "Conexant cx231xx Audio");
694 INIT_WORK(&dev->wq_trigger, audio_trigger);
696 err = snd_card_register(card);
701 adev->sndcard = card;
702 adev->udev = dev->udev;
704 /* compute alternate max packet sizes for Audio */
706 dev->udev->actconfig->interface[dev->current_pcb_config.
707 hs_config_info[0].interface_info.
710 adev->end_point_addr =
711 le16_to_cpu(uif->altsetting[0].endpoint[isoc_pipe].desc.
714 adev->num_alt = uif->num_altsetting;
715 cx231xx_info("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);
719 if (adev->alt_max_pkt_size == NULL) {
720 cx231xx_errdev("out of memory!\n");
724 for (i = 0; i < adev->num_alt; i++) {
726 le16_to_cpu(uif->altsetting[i].endpoint[isoc_pipe].desc.
728 adev->alt_max_pkt_size[i] =
729 (tmp & 0x07ff) * (((tmp & 0x1800) >> 11) + 1);
730 cx231xx_info("Alternate setting %i, max size= %i\n", i,
731 adev->alt_max_pkt_size[i]);
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);