2 * Line6 Linux USB driver - 0.9.1beta
4 * Copyright (C) 2004-2010 Markus Grabner (grabner@icg.tugraz.at)
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License as
8 * published by the Free Software Foundation, version 2.
12 #include <linux/slab.h>
13 #include <sound/core.h>
14 #include <sound/control.h>
15 #include <sound/pcm.h>
16 #include <sound/pcm_params.h>
24 #ifdef CONFIG_LINE6_USB_IMPULSE_RESPONSE
26 static struct snd_line6_pcm
*dev2pcm(struct device
*dev
)
28 struct usb_interface
*interface
= to_usb_interface(dev
);
29 struct usb_line6
*line6
= usb_get_intfdata(interface
);
30 struct snd_line6_pcm
*line6pcm
= line6
->line6pcm
;
35 "read" request on "impulse_volume" special file.
37 static ssize_t
pcm_get_impulse_volume(struct device
*dev
,
38 struct device_attribute
*attr
, char *buf
)
40 return sprintf(buf
, "%d\n", dev2pcm(dev
)->impulse_volume
);
44 "write" request on "impulse_volume" special file.
46 static ssize_t
pcm_set_impulse_volume(struct device
*dev
,
47 struct device_attribute
*attr
,
48 const char *buf
, size_t count
)
50 struct snd_line6_pcm
*line6pcm
= dev2pcm(dev
);
54 ret
= kstrtoint(buf
, 10, &value
);
58 line6pcm
->impulse_volume
= value
;
61 line6_pcm_acquire(line6pcm
, LINE6_BITS_PCM_IMPULSE
);
63 line6_pcm_release(line6pcm
, LINE6_BITS_PCM_IMPULSE
);
69 "read" request on "impulse_period" special file.
71 static ssize_t
pcm_get_impulse_period(struct device
*dev
,
72 struct device_attribute
*attr
, char *buf
)
74 return sprintf(buf
, "%d\n", dev2pcm(dev
)->impulse_period
);
78 "write" request on "impulse_period" special file.
80 static ssize_t
pcm_set_impulse_period(struct device
*dev
,
81 struct device_attribute
*attr
,
82 const char *buf
, size_t count
)
87 ret
= kstrtoint(buf
, 10, &value
);
91 dev2pcm(dev
)->impulse_period
= value
;
95 static DEVICE_ATTR(impulse_volume
, S_IWUSR
| S_IRUGO
, pcm_get_impulse_volume
,
96 pcm_set_impulse_volume
);
97 static DEVICE_ATTR(impulse_period
, S_IWUSR
| S_IRUGO
, pcm_get_impulse_period
,
98 pcm_set_impulse_period
);
102 static bool test_flags(unsigned long flags0
, unsigned long flags1
,
105 return ((flags0
& mask
) == 0) && ((flags1
& mask
) != 0);
108 int line6_pcm_acquire(struct snd_line6_pcm
*line6pcm
, int channels
)
110 unsigned long flags_old
, flags_new
, flags_final
;
114 flags_old
= ACCESS_ONCE(line6pcm
->flags
);
115 flags_new
= flags_old
| channels
;
116 } while (cmpxchg(&line6pcm
->flags
, flags_old
, flags_new
) != flags_old
);
118 flags_final
= flags_old
;
120 line6pcm
->prev_fbuf
= NULL
;
122 if (test_flags(flags_old
, flags_new
, LINE6_BITS_CAPTURE_BUFFER
)) {
123 /* Invoked multiple times in a row so allocate once only */
124 if (!line6pcm
->buffer_in
) {
125 line6pcm
->buffer_in
=
126 kmalloc(LINE6_ISO_BUFFERS
* LINE6_ISO_PACKETS
*
127 line6pcm
->max_packet_size
, GFP_KERNEL
);
128 if (!line6pcm
->buffer_in
) {
130 goto pcm_acquire_error
;
133 flags_final
|= channels
& LINE6_BITS_CAPTURE_BUFFER
;
137 if (test_flags(flags_old
, flags_new
, LINE6_BITS_CAPTURE_STREAM
)) {
139 Waiting for completion of active URBs in the stop handler is
140 a bug, we therefore report an error if capturing is restarted
143 if (line6pcm
->active_urb_in
| line6pcm
->unlink_urb_in
) {
144 dev_err(line6pcm
->line6
->ifcdev
, "Device not yet ready\n");
148 line6pcm
->count_in
= 0;
149 line6pcm
->prev_fsize
= 0;
150 err
= line6_submit_audio_in_all_urbs(line6pcm
);
153 goto pcm_acquire_error
;
155 flags_final
|= channels
& LINE6_BITS_CAPTURE_STREAM
;
158 if (test_flags(flags_old
, flags_new
, LINE6_BITS_PLAYBACK_BUFFER
)) {
159 /* Invoked multiple times in a row so allocate once only */
160 if (!line6pcm
->buffer_out
) {
161 line6pcm
->buffer_out
=
162 kmalloc(LINE6_ISO_BUFFERS
* LINE6_ISO_PACKETS
*
163 line6pcm
->max_packet_size
, GFP_KERNEL
);
164 if (!line6pcm
->buffer_out
) {
166 goto pcm_acquire_error
;
169 flags_final
|= channels
& LINE6_BITS_PLAYBACK_BUFFER
;
173 if (test_flags(flags_old
, flags_new
, LINE6_BITS_PLAYBACK_STREAM
)) {
175 See comment above regarding PCM restart.
177 if (line6pcm
->active_urb_out
| line6pcm
->unlink_urb_out
) {
178 dev_err(line6pcm
->line6
->ifcdev
, "Device not yet ready\n");
182 line6pcm
->count_out
= 0;
183 err
= line6_submit_audio_out_all_urbs(line6pcm
);
186 goto pcm_acquire_error
;
188 flags_final
|= channels
& LINE6_BITS_PLAYBACK_STREAM
;
195 If not all requested resources/streams could be obtained, release
196 those which were successfully obtained (if any).
198 line6_pcm_release(line6pcm
, flags_final
& channels
);
202 int line6_pcm_release(struct snd_line6_pcm
*line6pcm
, int channels
)
204 unsigned long flags_old
, flags_new
;
207 flags_old
= ACCESS_ONCE(line6pcm
->flags
);
208 flags_new
= flags_old
& ~channels
;
209 } while (cmpxchg(&line6pcm
->flags
, flags_old
, flags_new
) != flags_old
);
211 if (test_flags(flags_new
, flags_old
, LINE6_BITS_CAPTURE_STREAM
))
212 line6_unlink_audio_in_urbs(line6pcm
);
214 if (test_flags(flags_new
, flags_old
, LINE6_BITS_CAPTURE_BUFFER
)) {
215 line6_wait_clear_audio_in_urbs(line6pcm
);
216 line6_free_capture_buffer(line6pcm
);
219 if (test_flags(flags_new
, flags_old
, LINE6_BITS_PLAYBACK_STREAM
))
220 line6_unlink_audio_out_urbs(line6pcm
);
222 if (test_flags(flags_new
, flags_old
, LINE6_BITS_PLAYBACK_BUFFER
)) {
223 line6_wait_clear_audio_out_urbs(line6pcm
);
224 line6_free_playback_buffer(line6pcm
);
230 /* trigger callback */
231 int snd_line6_trigger(struct snd_pcm_substream
*substream
, int cmd
)
233 struct snd_line6_pcm
*line6pcm
= snd_pcm_substream_chip(substream
);
234 struct snd_pcm_substream
*s
;
238 spin_lock_irqsave(&line6pcm
->lock_trigger
, flags
);
239 clear_bit(LINE6_INDEX_PREPARED
, &line6pcm
->flags
);
241 snd_pcm_group_for_each_entry(s
, substream
) {
243 case SNDRV_PCM_STREAM_PLAYBACK
:
244 err
= snd_line6_playback_trigger(line6pcm
, cmd
);
247 spin_unlock_irqrestore(&line6pcm
->lock_trigger
,
254 case SNDRV_PCM_STREAM_CAPTURE
:
255 err
= snd_line6_capture_trigger(line6pcm
, cmd
);
258 spin_unlock_irqrestore(&line6pcm
->lock_trigger
,
266 dev_err(line6pcm
->line6
->ifcdev
,
267 "Unknown stream direction %d\n", s
->stream
);
271 spin_unlock_irqrestore(&line6pcm
->lock_trigger
, flags
);
275 /* control info callback */
276 static int snd_line6_control_playback_info(struct snd_kcontrol
*kcontrol
,
277 struct snd_ctl_elem_info
*uinfo
)
279 uinfo
->type
= SNDRV_CTL_ELEM_TYPE_INTEGER
;
281 uinfo
->value
.integer
.min
= 0;
282 uinfo
->value
.integer
.max
= 256;
286 /* control get callback */
287 static int snd_line6_control_playback_get(struct snd_kcontrol
*kcontrol
,
288 struct snd_ctl_elem_value
*ucontrol
)
291 struct snd_line6_pcm
*line6pcm
= snd_kcontrol_chip(kcontrol
);
294 ucontrol
->value
.integer
.value
[i
] = line6pcm
->volume_playback
[i
];
299 /* control put callback */
300 static int snd_line6_control_playback_put(struct snd_kcontrol
*kcontrol
,
301 struct snd_ctl_elem_value
*ucontrol
)
304 struct snd_line6_pcm
*line6pcm
= snd_kcontrol_chip(kcontrol
);
307 if (line6pcm
->volume_playback
[i
] !=
308 ucontrol
->value
.integer
.value
[i
]) {
309 line6pcm
->volume_playback
[i
] =
310 ucontrol
->value
.integer
.value
[i
];
317 /* control definition */
318 static struct snd_kcontrol_new line6_control_playback
= {
319 .iface
= SNDRV_CTL_ELEM_IFACE_MIXER
,
320 .name
= "PCM Playback Volume",
322 .access
= SNDRV_CTL_ELEM_ACCESS_READWRITE
,
323 .info
= snd_line6_control_playback_info
,
324 .get
= snd_line6_control_playback_get
,
325 .put
= snd_line6_control_playback_put
329 Cleanup the PCM device.
331 static void line6_cleanup_pcm(struct snd_pcm
*pcm
)
334 struct snd_line6_pcm
*line6pcm
= snd_pcm_chip(pcm
);
336 #ifdef CONFIG_LINE6_USB_IMPULSE_RESPONSE
337 device_remove_file(line6pcm
->line6
->ifcdev
, &dev_attr_impulse_volume
);
338 device_remove_file(line6pcm
->line6
->ifcdev
, &dev_attr_impulse_period
);
341 for (i
= LINE6_ISO_BUFFERS
; i
--;) {
342 if (line6pcm
->urb_audio_out
[i
]) {
343 usb_kill_urb(line6pcm
->urb_audio_out
[i
]);
344 usb_free_urb(line6pcm
->urb_audio_out
[i
]);
346 if (line6pcm
->urb_audio_in
[i
]) {
347 usb_kill_urb(line6pcm
->urb_audio_in
[i
]);
348 usb_free_urb(line6pcm
->urb_audio_in
[i
]);
353 /* create a PCM device */
354 static int snd_line6_new_pcm(struct snd_line6_pcm
*line6pcm
)
359 err
= snd_pcm_new(line6pcm
->line6
->card
,
360 (char *)line6pcm
->line6
->properties
->name
,
365 pcm
->private_data
= line6pcm
;
366 pcm
->private_free
= line6_cleanup_pcm
;
368 strcpy(pcm
->name
, line6pcm
->line6
->properties
->name
);
371 snd_pcm_set_ops(pcm
, SNDRV_PCM_STREAM_PLAYBACK
,
372 &snd_line6_playback_ops
);
373 snd_pcm_set_ops(pcm
, SNDRV_PCM_STREAM_CAPTURE
, &snd_line6_capture_ops
);
375 /* pre-allocation of buffers */
376 snd_pcm_lib_preallocate_pages_for_all(pcm
, SNDRV_DMA_TYPE_CONTINUOUS
,
377 snd_dma_continuous_data
378 (GFP_KERNEL
), 64 * 1024,
384 /* PCM device destructor */
385 static int snd_line6_pcm_free(struct snd_device
*device
)
391 Stop substream if still running.
393 static void pcm_disconnect_substream(struct snd_pcm_substream
*substream
)
395 if (substream
->runtime
&& snd_pcm_running(substream
))
396 snd_pcm_stop(substream
, SNDRV_PCM_STATE_DISCONNECTED
);
402 void line6_pcm_disconnect(struct snd_line6_pcm
*line6pcm
)
404 pcm_disconnect_substream(get_substream
405 (line6pcm
, SNDRV_PCM_STREAM_CAPTURE
));
406 pcm_disconnect_substream(get_substream
407 (line6pcm
, SNDRV_PCM_STREAM_PLAYBACK
));
408 line6_unlink_wait_clear_audio_out_urbs(line6pcm
);
409 line6_unlink_wait_clear_audio_in_urbs(line6pcm
);
413 Create and register the PCM device and mixer entries.
414 Create URBs for playback and capture.
416 int line6_init_pcm(struct usb_line6
*line6
,
417 struct line6_pcm_properties
*properties
)
419 static struct snd_device_ops pcm_ops
= {
420 .dev_free
= snd_line6_pcm_free
,
424 int ep_read
= 0, ep_write
= 0;
425 struct snd_line6_pcm
*line6pcm
;
427 if (!(line6
->properties
->capabilities
& LINE6_BIT_PCM
))
428 return 0; /* skip PCM initialization and report success */
430 /* initialize PCM subsystem based on product id: */
431 switch (line6
->product
) {
432 case LINE6_DEVID_BASSPODXT
:
433 case LINE6_DEVID_BASSPODXTLIVE
:
434 case LINE6_DEVID_BASSPODXTPRO
:
435 case LINE6_DEVID_PODXT
:
436 case LINE6_DEVID_PODXTLIVE
:
437 case LINE6_DEVID_PODXTPRO
:
438 case LINE6_DEVID_PODHD300
:
443 case LINE6_DEVID_PODHD500
:
444 case LINE6_DEVID_PODX3
:
445 case LINE6_DEVID_PODX3LIVE
:
450 case LINE6_DEVID_POCKETPOD
:
455 case LINE6_DEVID_GUITARPORT
:
456 case LINE6_DEVID_PODSTUDIO_GX
:
457 case LINE6_DEVID_PODSTUDIO_UX1
:
458 case LINE6_DEVID_PODSTUDIO_UX2
:
459 case LINE6_DEVID_TONEPORT_GX
:
460 case LINE6_DEVID_TONEPORT_UX1
:
461 case LINE6_DEVID_TONEPORT_UX2
:
466 /* this is for interface_number == 1:
467 case LINE6_DEVID_TONEPORT_UX2:
468 case LINE6_DEVID_PODSTUDIO_UX2:
477 line6pcm
= kzalloc(sizeof(struct snd_line6_pcm
), GFP_KERNEL
);
479 if (line6pcm
== NULL
)
482 line6pcm
->volume_playback
[0] = line6pcm
->volume_playback
[1] = 255;
483 line6pcm
->volume_monitor
= 255;
484 line6pcm
->line6
= line6
;
485 line6pcm
->ep_audio_read
= ep_read
;
486 line6pcm
->ep_audio_write
= ep_write
;
488 /* Read and write buffers are sized identically, so choose minimum */
489 line6pcm
->max_packet_size
= min(
490 usb_maxpacket(line6
->usbdev
,
491 usb_rcvisocpipe(line6
->usbdev
, ep_read
), 0),
492 usb_maxpacket(line6
->usbdev
,
493 usb_sndisocpipe(line6
->usbdev
, ep_write
), 1));
495 line6pcm
->properties
= properties
;
496 line6
->line6pcm
= line6pcm
;
499 err
= snd_device_new(line6
->card
, SNDRV_DEV_PCM
, line6
, &pcm_ops
);
503 snd_card_set_dev(line6
->card
, line6
->ifcdev
);
505 err
= snd_line6_new_pcm(line6pcm
);
509 spin_lock_init(&line6pcm
->lock_audio_out
);
510 spin_lock_init(&line6pcm
->lock_audio_in
);
511 spin_lock_init(&line6pcm
->lock_trigger
);
513 err
= line6_create_audio_out_urbs(line6pcm
);
517 err
= line6_create_audio_in_urbs(line6pcm
);
523 snd_ctl_add(line6
->card
,
524 snd_ctl_new1(&line6_control_playback
, line6pcm
));
528 #ifdef CONFIG_LINE6_USB_IMPULSE_RESPONSE
529 /* impulse response test: */
530 err
= device_create_file(line6
->ifcdev
, &dev_attr_impulse_volume
);
534 err
= device_create_file(line6
->ifcdev
, &dev_attr_impulse_period
);
538 line6pcm
->impulse_period
= LINE6_IMPULSE_DEFAULT_PERIOD
;
544 /* prepare pcm callback */
545 int snd_line6_prepare(struct snd_pcm_substream
*substream
)
547 struct snd_line6_pcm
*line6pcm
= snd_pcm_substream_chip(substream
);
549 switch (substream
->stream
) {
550 case SNDRV_PCM_STREAM_PLAYBACK
:
551 if ((line6pcm
->flags
& LINE6_BITS_PLAYBACK_STREAM
) == 0)
552 line6_unlink_wait_clear_audio_out_urbs(line6pcm
);
556 case SNDRV_PCM_STREAM_CAPTURE
:
557 if ((line6pcm
->flags
& LINE6_BITS_CAPTURE_STREAM
) == 0)
558 line6_unlink_wait_clear_audio_in_urbs(line6pcm
);
566 if (!test_and_set_bit(LINE6_INDEX_PREPARED
, &line6pcm
->flags
)) {
567 line6pcm
->count_out
= 0;
568 line6pcm
->pos_out
= 0;
569 line6pcm
->pos_out_done
= 0;
570 line6pcm
->bytes_out
= 0;
571 line6pcm
->count_in
= 0;
572 line6pcm
->pos_in_done
= 0;
573 line6pcm
->bytes_in
= 0;