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12#include <linux/kernel.h>
13#include <linux/module.h>
14#include <linux/export.h>
15#include <linux/slab.h>
16#include <linux/usb.h>
17
18#include <sound/core.h>
19#include <sound/initval.h>
20#include <sound/hwdep.h>
21
22#include "capture.h"
23#include "driver.h"
24#include "midi.h"
25#include "playback.h"
26
27#define DRIVER_AUTHOR "Markus Grabner <grabner@icg.tugraz.at>"
28#define DRIVER_DESC "Line 6 USB Driver"
29
30
31
32
33const unsigned char line6_midi_id[3] = {
34 0x00, 0x01, 0x0c
35};
36EXPORT_SYMBOL_GPL(line6_midi_id);
37
38
39
40
41
42static const char line6_request_version[] = {
43 0xf0, 0x7e, 0x7f, 0x06, 0x01, 0xf7
44};
45
46
47
48
49struct message {
50 struct usb_line6 *line6;
51 const char *buffer;
52 int size;
53 int done;
54};
55
56
57
58
59static void line6_data_received(struct urb *urb);
60static int line6_send_raw_message_async_part(struct message *msg,
61 struct urb *urb);
62
63
64
65
66static int line6_start_listen(struct usb_line6 *line6)
67{
68 int err;
69
70 if (line6->properties->capabilities & LINE6_CAP_CONTROL_MIDI) {
71 usb_fill_int_urb(line6->urb_listen, line6->usbdev,
72 usb_rcvintpipe(line6->usbdev, line6->properties->ep_ctrl_r),
73 line6->buffer_listen, LINE6_BUFSIZE_LISTEN,
74 line6_data_received, line6, line6->interval);
75 } else {
76 usb_fill_bulk_urb(line6->urb_listen, line6->usbdev,
77 usb_rcvbulkpipe(line6->usbdev, line6->properties->ep_ctrl_r),
78 line6->buffer_listen, LINE6_BUFSIZE_LISTEN,
79 line6_data_received, line6);
80 }
81 line6->urb_listen->actual_length = 0;
82 err = usb_submit_urb(line6->urb_listen, GFP_ATOMIC);
83 return err;
84}
85
86
87
88
89static void line6_stop_listen(struct usb_line6 *line6)
90{
91 usb_kill_urb(line6->urb_listen);
92}
93
94
95
96
97static int line6_send_raw_message(struct usb_line6 *line6, const char *buffer,
98 int size)
99{
100 int i, done = 0;
101 const struct line6_properties *properties = line6->properties;
102
103 for (i = 0; i < size; i += line6->max_packet_size) {
104 int partial;
105 const char *frag_buf = buffer + i;
106 int frag_size = min(line6->max_packet_size, size - i);
107 int retval;
108
109 if (properties->capabilities & LINE6_CAP_CONTROL_MIDI) {
110 retval = usb_interrupt_msg(line6->usbdev,
111 usb_sndintpipe(line6->usbdev, properties->ep_ctrl_w),
112 (char *)frag_buf, frag_size,
113 &partial, LINE6_TIMEOUT * HZ);
114 } else {
115 retval = usb_bulk_msg(line6->usbdev,
116 usb_sndbulkpipe(line6->usbdev, properties->ep_ctrl_w),
117 (char *)frag_buf, frag_size,
118 &partial, LINE6_TIMEOUT * HZ);
119 }
120
121 if (retval) {
122 dev_err(line6->ifcdev,
123 "usb_bulk_msg failed (%d)\n", retval);
124 break;
125 }
126
127 done += frag_size;
128 }
129
130 return done;
131}
132
133
134
135
136static void line6_async_request_sent(struct urb *urb)
137{
138 struct message *msg = (struct message *)urb->context;
139
140 if (msg->done >= msg->size) {
141 usb_free_urb(urb);
142 kfree(msg);
143 } else
144 line6_send_raw_message_async_part(msg, urb);
145}
146
147
148
149
150static int line6_send_raw_message_async_part(struct message *msg,
151 struct urb *urb)
152{
153 int retval;
154 struct usb_line6 *line6 = msg->line6;
155 int done = msg->done;
156 int bytes = min(msg->size - done, line6->max_packet_size);
157
158 if (line6->properties->capabilities & LINE6_CAP_CONTROL_MIDI) {
159 usb_fill_int_urb(urb, line6->usbdev,
160 usb_sndintpipe(line6->usbdev, line6->properties->ep_ctrl_w),
161 (char *)msg->buffer + done, bytes,
162 line6_async_request_sent, msg, line6->interval);
163 } else {
164 usb_fill_bulk_urb(urb, line6->usbdev,
165 usb_sndbulkpipe(line6->usbdev, line6->properties->ep_ctrl_w),
166 (char *)msg->buffer + done, bytes,
167 line6_async_request_sent, msg);
168 }
169
170 msg->done += bytes;
171 retval = usb_submit_urb(urb, GFP_ATOMIC);
172
173 if (retval < 0) {
174 dev_err(line6->ifcdev, "%s: usb_submit_urb failed (%d)\n",
175 __func__, retval);
176 usb_free_urb(urb);
177 kfree(msg);
178 return retval;
179 }
180
181 return 0;
182}
183
184
185
186
187void line6_start_timer(struct timer_list *timer, unsigned long msecs,
188 void (*function)(unsigned long), unsigned long data)
189{
190 setup_timer(timer, function, data);
191 mod_timer(timer, jiffies + msecs_to_jiffies(msecs));
192}
193EXPORT_SYMBOL_GPL(line6_start_timer);
194
195
196
197
198int line6_send_raw_message_async(struct usb_line6 *line6, const char *buffer,
199 int size)
200{
201 struct message *msg;
202 struct urb *urb;
203
204
205 msg = kmalloc(sizeof(struct message), GFP_ATOMIC);
206 if (msg == NULL)
207 return -ENOMEM;
208
209
210 urb = usb_alloc_urb(0, GFP_ATOMIC);
211
212 if (urb == NULL) {
213 kfree(msg);
214 return -ENOMEM;
215 }
216
217
218 msg->line6 = line6;
219 msg->buffer = buffer;
220 msg->size = size;
221 msg->done = 0;
222
223
224 return line6_send_raw_message_async_part(msg, urb);
225}
226EXPORT_SYMBOL_GPL(line6_send_raw_message_async);
227
228
229
230
231int line6_version_request_async(struct usb_line6 *line6)
232{
233 char *buffer;
234 int retval;
235
236 buffer = kmemdup(line6_request_version,
237 sizeof(line6_request_version), GFP_ATOMIC);
238 if (buffer == NULL)
239 return -ENOMEM;
240
241 retval = line6_send_raw_message_async(line6, buffer,
242 sizeof(line6_request_version));
243 kfree(buffer);
244 return retval;
245}
246EXPORT_SYMBOL_GPL(line6_version_request_async);
247
248
249
250
251int line6_send_sysex_message(struct usb_line6 *line6, const char *buffer,
252 int size)
253{
254 return line6_send_raw_message(line6, buffer,
255 size + SYSEX_EXTRA_SIZE) -
256 SYSEX_EXTRA_SIZE;
257}
258EXPORT_SYMBOL_GPL(line6_send_sysex_message);
259
260
261
262
263
264
265char *line6_alloc_sysex_buffer(struct usb_line6 *line6, int code1, int code2,
266 int size)
267{
268 char *buffer = kmalloc(size + SYSEX_EXTRA_SIZE, GFP_ATOMIC);
269
270 if (!buffer)
271 return NULL;
272
273 buffer[0] = LINE6_SYSEX_BEGIN;
274 memcpy(buffer + 1, line6_midi_id, sizeof(line6_midi_id));
275 buffer[sizeof(line6_midi_id) + 1] = code1;
276 buffer[sizeof(line6_midi_id) + 2] = code2;
277 buffer[sizeof(line6_midi_id) + 3 + size] = LINE6_SYSEX_END;
278 return buffer;
279}
280EXPORT_SYMBOL_GPL(line6_alloc_sysex_buffer);
281
282
283
284
285static void line6_data_received(struct urb *urb)
286{
287 struct usb_line6 *line6 = (struct usb_line6 *)urb->context;
288 struct midi_buffer *mb = &line6->line6midi->midibuf_in;
289 int done;
290
291 if (urb->status == -ESHUTDOWN)
292 return;
293
294 if (line6->properties->capabilities & LINE6_CAP_CONTROL_MIDI) {
295 done =
296 line6_midibuf_write(mb, urb->transfer_buffer, urb->actual_length);
297
298 if (done < urb->actual_length) {
299 line6_midibuf_ignore(mb, done);
300 dev_dbg(line6->ifcdev, "%d %d buffer overflow - message skipped\n",
301 done, urb->actual_length);
302 }
303
304 for (;;) {
305 done =
306 line6_midibuf_read(mb, line6->buffer_message,
307 LINE6_MIDI_MESSAGE_MAXLEN);
308
309 if (done == 0)
310 break;
311
312 line6->message_length = done;
313 line6_midi_receive(line6, line6->buffer_message, done);
314
315 if (line6->process_message)
316 line6->process_message(line6);
317 }
318 } else {
319 line6->buffer_message = urb->transfer_buffer;
320 line6->message_length = urb->actual_length;
321 if (line6->process_message)
322 line6->process_message(line6);
323 line6->buffer_message = NULL;
324 }
325
326 line6_start_listen(line6);
327}
328
329#define LINE6_READ_WRITE_STATUS_DELAY 2
330#define LINE6_READ_WRITE_MAX_RETRIES 50
331
332
333
334
335int line6_read_data(struct usb_line6 *line6, unsigned address, void *data,
336 unsigned datalen)
337{
338 struct usb_device *usbdev = line6->usbdev;
339 int ret;
340 unsigned char len;
341 unsigned count;
342
343 if (address > 0xffff || datalen > 0xff)
344 return -EINVAL;
345
346
347 ret = usb_control_msg(usbdev, usb_sndctrlpipe(usbdev, 0), 0x67,
348 USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT,
349 (datalen << 8) | 0x21, address,
350 NULL, 0, LINE6_TIMEOUT * HZ);
351
352 if (ret < 0) {
353 dev_err(line6->ifcdev, "read request failed (error %d)\n", ret);
354 return ret;
355 }
356
357
358 for (count = 0; count < LINE6_READ_WRITE_MAX_RETRIES; count++) {
359 mdelay(LINE6_READ_WRITE_STATUS_DELAY);
360
361 ret = usb_control_msg(usbdev, usb_rcvctrlpipe(usbdev, 0), 0x67,
362 USB_TYPE_VENDOR | USB_RECIP_DEVICE |
363 USB_DIR_IN,
364 0x0012, 0x0000, &len, 1,
365 LINE6_TIMEOUT * HZ);
366 if (ret < 0) {
367 dev_err(line6->ifcdev,
368 "receive length failed (error %d)\n", ret);
369 return ret;
370 }
371
372 if (len != 0xff)
373 break;
374 }
375
376 if (len == 0xff) {
377 dev_err(line6->ifcdev, "read failed after %d retries\n",
378 count);
379 return -EIO;
380 } else if (len != datalen) {
381
382 dev_err(line6->ifcdev,
383 "length mismatch (expected %d, got %d)\n",
384 (int)datalen, (int)len);
385 return -EIO;
386 }
387
388
389 ret = usb_control_msg(usbdev, usb_rcvctrlpipe(usbdev, 0), 0x67,
390 USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN,
391 0x0013, 0x0000, data, datalen,
392 LINE6_TIMEOUT * HZ);
393
394 if (ret < 0) {
395 dev_err(line6->ifcdev, "read failed (error %d)\n", ret);
396 return ret;
397 }
398
399 return 0;
400}
401EXPORT_SYMBOL_GPL(line6_read_data);
402
403
404
405
406int line6_write_data(struct usb_line6 *line6, unsigned address, void *data,
407 unsigned datalen)
408{
409 struct usb_device *usbdev = line6->usbdev;
410 int ret;
411 unsigned char status;
412 int count;
413
414 if (address > 0xffff || datalen > 0xffff)
415 return -EINVAL;
416
417 ret = usb_control_msg(usbdev, usb_sndctrlpipe(usbdev, 0), 0x67,
418 USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT,
419 0x0022, address, data, datalen,
420 LINE6_TIMEOUT * HZ);
421
422 if (ret < 0) {
423 dev_err(line6->ifcdev,
424 "write request failed (error %d)\n", ret);
425 return ret;
426 }
427
428 for (count = 0; count < LINE6_READ_WRITE_MAX_RETRIES; count++) {
429 mdelay(LINE6_READ_WRITE_STATUS_DELAY);
430
431 ret = usb_control_msg(usbdev, usb_rcvctrlpipe(usbdev, 0),
432 0x67,
433 USB_TYPE_VENDOR | USB_RECIP_DEVICE |
434 USB_DIR_IN,
435 0x0012, 0x0000,
436 &status, 1, LINE6_TIMEOUT * HZ);
437
438 if (ret < 0) {
439 dev_err(line6->ifcdev,
440 "receiving status failed (error %d)\n", ret);
441 return ret;
442 }
443
444 if (status != 0xff)
445 break;
446 }
447
448 if (status == 0xff) {
449 dev_err(line6->ifcdev, "write failed after %d retries\n",
450 count);
451 return -EIO;
452 } else if (status != 0) {
453 dev_err(line6->ifcdev, "write failed (error %d)\n", ret);
454 return -EIO;
455 }
456
457 return 0;
458}
459EXPORT_SYMBOL_GPL(line6_write_data);
460
461
462
463
464
465int line6_read_serial_number(struct usb_line6 *line6, u32 *serial_number)
466{
467 return line6_read_data(line6, 0x80d0, serial_number,
468 sizeof(*serial_number));
469}
470EXPORT_SYMBOL_GPL(line6_read_serial_number);
471
472
473
474
475static void line6_destruct(struct snd_card *card)
476{
477 struct usb_line6 *line6 = card->private_data;
478 struct usb_device *usbdev = line6->usbdev;
479
480
481
482
483 kfree(line6->buffer_message);
484
485 kfree(line6->buffer_listen);
486
487
488 usb_free_urb(line6->urb_listen);
489 line6->urb_listen = NULL;
490
491
492 usb_put_dev(usbdev);
493}
494
495static void line6_get_usb_properties(struct usb_line6 *line6)
496{
497 struct usb_device *usbdev = line6->usbdev;
498 const struct line6_properties *properties = line6->properties;
499 int pipe;
500 struct usb_host_endpoint *ep = NULL;
501
502 if (properties->capabilities & LINE6_CAP_CONTROL) {
503 if (properties->capabilities & LINE6_CAP_CONTROL_MIDI) {
504 pipe = usb_rcvintpipe(line6->usbdev,
505 line6->properties->ep_ctrl_r);
506 } else {
507 pipe = usb_rcvbulkpipe(line6->usbdev,
508 line6->properties->ep_ctrl_r);
509 }
510 ep = usbdev->ep_in[usb_pipeendpoint(pipe)];
511 }
512
513
514 if (ep) {
515 line6->interval = ep->desc.bInterval;
516 line6->max_packet_size = le16_to_cpu(ep->desc.wMaxPacketSize);
517 } else {
518 if (properties->capabilities & LINE6_CAP_CONTROL) {
519 dev_err(line6->ifcdev,
520 "endpoint not available, using fallback values");
521 }
522 line6->interval = LINE6_FALLBACK_INTERVAL;
523 line6->max_packet_size = LINE6_FALLBACK_MAXPACKETSIZE;
524 }
525
526
527 if (usbdev->speed == USB_SPEED_LOW) {
528 line6->intervals_per_second = USB_LOW_INTERVALS_PER_SECOND;
529 line6->iso_buffers = USB_LOW_ISO_BUFFERS;
530 } else {
531 line6->intervals_per_second = USB_HIGH_INTERVALS_PER_SECOND;
532 line6->iso_buffers = USB_HIGH_ISO_BUFFERS;
533 }
534}
535
536
537static int line6_hwdep_open(struct snd_hwdep *hw, struct file *file)
538{
539 struct usb_line6 *line6 = hw->private_data;
540
541
542
543 line6->messages.active = 1;
544
545 return 0;
546}
547
548
549static int line6_hwdep_release(struct snd_hwdep *hw, struct file *file)
550{
551 struct usb_line6 *line6 = hw->private_data;
552
553 line6->messages.active = 0;
554
555 return 0;
556}
557
558
559static long
560line6_hwdep_read(struct snd_hwdep *hwdep, char __user *buf, long count,
561 loff_t *offset)
562{
563 struct usb_line6 *line6 = hwdep->private_data;
564 long rv = 0;
565 unsigned int out_count;
566
567 if (mutex_lock_interruptible(&line6->messages.read_lock))
568 return -ERESTARTSYS;
569
570 while (kfifo_len(&line6->messages.fifo) == 0) {
571 mutex_unlock(&line6->messages.read_lock);
572
573 rv = wait_event_interruptible(
574 line6->messages.wait_queue,
575 kfifo_len(&line6->messages.fifo) != 0);
576 if (rv < 0)
577 return rv;
578
579 if (mutex_lock_interruptible(&line6->messages.read_lock))
580 return -ERESTARTSYS;
581 }
582
583 if (kfifo_peek_len(&line6->messages.fifo) > count) {
584
585 rv = -EINVAL;
586 } else {
587 rv = kfifo_to_user(&line6->messages.fifo, buf, count, &out_count);
588 if (rv == 0)
589 rv = out_count;
590 }
591
592 mutex_unlock(&line6->messages.read_lock);
593 return rv;
594}
595
596
597static long
598line6_hwdep_write(struct snd_hwdep *hwdep, const char __user *data, long count,
599 loff_t *offset)
600{
601 struct usb_line6 *line6 = hwdep->private_data;
602 int rv;
603 char *data_copy;
604
605 if (count > line6->max_packet_size * LINE6_RAW_MESSAGES_MAXCOUNT) {
606
607 return -EINVAL;
608 }
609
610 data_copy = memdup_user(data, count);
611 if (IS_ERR(data_copy))
612 return PTR_ERR(data_copy);
613
614 rv = line6_send_raw_message(line6, data_copy, count);
615
616 kfree(data_copy);
617 return rv;
618}
619
620static const struct snd_hwdep_ops hwdep_ops = {
621 .open = line6_hwdep_open,
622 .release = line6_hwdep_release,
623 .read = line6_hwdep_read,
624 .write = line6_hwdep_write,
625};
626
627
628static void line6_hwdep_push_message(struct usb_line6 *line6)
629{
630 if (!line6->messages.active)
631 return;
632
633 if (kfifo_avail(&line6->messages.fifo) >= line6->message_length) {
634
635 kfifo_in(&line6->messages.fifo,
636 line6->buffer_message, line6->message_length);
637 }
638
639 wake_up_interruptible(&line6->messages.wait_queue);
640}
641
642static int line6_hwdep_init(struct usb_line6 *line6)
643{
644 int err;
645 struct snd_hwdep *hwdep;
646
647
648 line6->process_message = line6_hwdep_push_message;
649 line6->messages.active = 0;
650 init_waitqueue_head(&line6->messages.wait_queue);
651 mutex_init(&line6->messages.read_lock);
652 INIT_KFIFO(line6->messages.fifo);
653
654 err = snd_hwdep_new(line6->card, "config", 0, &hwdep);
655 if (err < 0)
656 goto end;
657 strcpy(hwdep->name, "config");
658 hwdep->iface = SNDRV_HWDEP_IFACE_LINE6;
659 hwdep->ops = hwdep_ops;
660 hwdep->private_data = line6;
661 hwdep->exclusive = true;
662
663end:
664 return err;
665}
666
667static int line6_init_cap_control(struct usb_line6 *line6)
668{
669 int ret;
670
671
672 line6->buffer_listen = kmalloc(LINE6_BUFSIZE_LISTEN, GFP_KERNEL);
673 if (!line6->buffer_listen)
674 return -ENOMEM;
675
676 line6->urb_listen = usb_alloc_urb(0, GFP_KERNEL);
677 if (!line6->urb_listen)
678 return -ENOMEM;
679
680 if (line6->properties->capabilities & LINE6_CAP_CONTROL_MIDI) {
681 line6->buffer_message = kmalloc(LINE6_MIDI_MESSAGE_MAXLEN, GFP_KERNEL);
682 if (!line6->buffer_message)
683 return -ENOMEM;
684 } else {
685 ret = line6_hwdep_init(line6);
686 if (ret < 0)
687 return ret;
688 }
689
690 ret = line6_start_listen(line6);
691 if (ret < 0) {
692 dev_err(line6->ifcdev, "cannot start listening: %d\n", ret);
693 return ret;
694 }
695
696 return 0;
697}
698
699
700
701
702int line6_probe(struct usb_interface *interface,
703 const struct usb_device_id *id,
704 const char *driver_name,
705 const struct line6_properties *properties,
706 int (*private_init)(struct usb_line6 *, const struct usb_device_id *id),
707 size_t data_size)
708{
709 struct usb_device *usbdev = interface_to_usbdev(interface);
710 struct snd_card *card;
711 struct usb_line6 *line6;
712 int interface_number;
713 int ret;
714
715 if (WARN_ON(data_size < sizeof(*line6)))
716 return -EINVAL;
717
718
719 if (usbdev->descriptor.bNumConfigurations != 1)
720 return -ENODEV;
721
722 ret = snd_card_new(&interface->dev,
723 SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1,
724 THIS_MODULE, data_size, &card);
725 if (ret < 0)
726 return ret;
727
728
729 line6 = card->private_data;
730 line6->card = card;
731 line6->properties = properties;
732 line6->usbdev = usbdev;
733 line6->ifcdev = &interface->dev;
734
735 strcpy(card->id, properties->id);
736 strcpy(card->driver, driver_name);
737 strcpy(card->shortname, properties->name);
738 sprintf(card->longname, "Line 6 %s at USB %s", properties->name,
739 dev_name(line6->ifcdev));
740 card->private_free = line6_destruct;
741
742 usb_set_intfdata(interface, line6);
743
744
745 usb_get_dev(usbdev);
746
747
748 dev_info(&interface->dev, "Line 6 %s found\n", properties->name);
749
750
751 interface_number = interface->cur_altsetting->desc.bInterfaceNumber;
752
753
754 ret = usb_set_interface(usbdev, interface_number,
755 properties->altsetting);
756 if (ret < 0) {
757 dev_err(&interface->dev, "set_interface failed\n");
758 goto error;
759 }
760
761 line6_get_usb_properties(line6);
762
763 if (properties->capabilities & LINE6_CAP_CONTROL) {
764 ret = line6_init_cap_control(line6);
765 if (ret < 0)
766 goto error;
767 }
768
769
770 ret = private_init(line6, id);
771 if (ret < 0)
772 goto error;
773
774
775
776 dev_info(&interface->dev, "Line 6 %s now attached\n",
777 properties->name);
778
779 return 0;
780
781 error:
782
783
784
785 line6_disconnect(interface);
786 return ret;
787}
788EXPORT_SYMBOL_GPL(line6_probe);
789
790
791
792
793void line6_disconnect(struct usb_interface *interface)
794{
795 struct usb_line6 *line6 = usb_get_intfdata(interface);
796 struct usb_device *usbdev = interface_to_usbdev(interface);
797
798 if (!line6)
799 return;
800
801 if (WARN_ON(usbdev != line6->usbdev))
802 return;
803
804 if (line6->urb_listen != NULL)
805 line6_stop_listen(line6);
806
807 snd_card_disconnect(line6->card);
808 if (line6->line6pcm)
809 line6_pcm_disconnect(line6->line6pcm);
810 if (line6->disconnect)
811 line6->disconnect(line6);
812
813 dev_info(&interface->dev, "Line 6 %s now disconnected\n",
814 line6->properties->name);
815
816
817 usb_set_intfdata(interface, NULL);
818
819 snd_card_free_when_closed(line6->card);
820}
821EXPORT_SYMBOL_GPL(line6_disconnect);
822
823#ifdef CONFIG_PM
824
825
826
827
828int line6_suspend(struct usb_interface *interface, pm_message_t message)
829{
830 struct usb_line6 *line6 = usb_get_intfdata(interface);
831 struct snd_line6_pcm *line6pcm = line6->line6pcm;
832
833 snd_power_change_state(line6->card, SNDRV_CTL_POWER_D3hot);
834
835 if (line6->properties->capabilities & LINE6_CAP_CONTROL)
836 line6_stop_listen(line6);
837
838 if (line6pcm != NULL) {
839 snd_pcm_suspend_all(line6pcm->pcm);
840 line6pcm->flags = 0;
841 }
842
843 return 0;
844}
845EXPORT_SYMBOL_GPL(line6_suspend);
846
847
848
849
850int line6_resume(struct usb_interface *interface)
851{
852 struct usb_line6 *line6 = usb_get_intfdata(interface);
853
854 if (line6->properties->capabilities & LINE6_CAP_CONTROL)
855 line6_start_listen(line6);
856
857 snd_power_change_state(line6->card, SNDRV_CTL_POWER_D0);
858 return 0;
859}
860EXPORT_SYMBOL_GPL(line6_resume);
861
862#endif
863
864MODULE_AUTHOR(DRIVER_AUTHOR);
865MODULE_DESCRIPTION(DRIVER_DESC);
866MODULE_LICENSE("GPL");
867
868