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 if (substream
->runtime
->dma_area
) {
503 dev_dbg(dev
->dev
, "freeing\n");
504 vfree(substream
->runtime
->dma_area
);
505 substream
->runtime
->dma_area
= NULL
;
507 mutex_unlock(&dev
->lock
);
509 if (dev
->adev
.users
== 0 && dev
->adev
.shutdown
== 1) {
510 dev_dbg(dev
->dev
, "audio users: %d\n", dev
->adev
.users
);
511 dev_dbg(dev
->dev
, "disabling audio stream!\n");
512 dev
->adev
.shutdown
= 0;
513 dev_dbg(dev
->dev
, "released lock\n");
514 if (atomic_read(&dev
->stream_started
) > 0) {
515 atomic_set(&dev
->stream_started
, 0);
516 schedule_work(&dev
->wq_trigger
);
522 static int snd_cx231xx_hw_capture_params(struct snd_pcm_substream
*substream
,
523 struct snd_pcm_hw_params
*hw_params
)
525 struct cx231xx
*dev
= snd_pcm_substream_chip(substream
);
528 dev_dbg(dev
->dev
, "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 dev_dbg(dev
->dev
, "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 dev_dbg(dev
->dev
, "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 dev_dbg(dev
->dev
, "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) */
670 "probing for cx231xx non standard usbaudio\n");
672 err
= snd_card_new(dev
->dev
, index
[devnr
], "Cx231xx Audio",
673 THIS_MODULE
, 0, &card
);
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 strcpy(card
->driver
, "Cx231xx-Audio");
690 strcpy(card
->shortname
, "Cx231xx Audio");
691 strcpy(card
->longname
, "Conexant cx231xx Audio");
693 INIT_WORK(&dev
->wq_trigger
, audio_trigger
);
695 err
= snd_card_register(card
);
700 adev
->sndcard
= card
;
701 adev
->udev
= dev
->udev
;
703 /* compute alternate max packet sizes for Audio */
705 dev
->udev
->actconfig
->interface
[dev
->current_pcb_config
.
706 hs_config_info
[0].interface_info
.
709 adev
->end_point_addr
=
710 uif
->altsetting
[0].endpoint
[isoc_pipe
].desc
.
713 adev
->num_alt
= uif
->num_altsetting
;
715 "audio 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
)
722 for (i
= 0; i
< adev
->num_alt
; i
++) {
724 le16_to_cpu(uif
->altsetting
[i
].endpoint
[isoc_pipe
].desc
.
726 adev
->alt_max_pkt_size
[i
] =
727 (tmp
& 0x07ff) * (((tmp
& 0x1800) >> 11) + 1);
729 "audio alternate setting %i, max size= %i\n", i
,
730 adev
->alt_max_pkt_size
[i
]);
736 static int cx231xx_audio_fini(struct cx231xx
*dev
)
741 if (dev
->has_alsa_audio
!= 1) {
742 /* This device does not support the extension (in this case
743 the device is expecting the snd-usb-audio module or
744 doesn't have analog audio support at all) */
748 if (dev
->adev
.sndcard
) {
749 snd_card_free(dev
->adev
.sndcard
);
750 kfree(dev
->adev
.alt_max_pkt_size
);
751 dev
->adev
.sndcard
= NULL
;
757 static struct cx231xx_ops audio_ops
= {
759 .name
= "Cx231xx Audio Extension",
760 .init
= cx231xx_audio_init
,
761 .fini
= cx231xx_audio_fini
,
764 static int __init
cx231xx_alsa_register(void)
766 return cx231xx_register_extension(&audio_ops
);
769 static void __exit
cx231xx_alsa_unregister(void)
771 cx231xx_unregister_extension(&audio_ops
);
774 MODULE_LICENSE("GPL");
775 MODULE_AUTHOR("Srinivasa Deevi <srinivasa.deevi@conexant.com>");
776 MODULE_DESCRIPTION("Cx231xx Audio driver");
778 module_init(cx231xx_alsa_register
);
779 module_exit(cx231xx_alsa_unregister
);