1
2
3
4
5
6
7
8
9
10
11
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
82
83 if (usb_urb_ep_type_check(line6->urb_listen)) {
84 dev_err(line6->ifcdev, "invalid control EP\n");
85 return -EINVAL;
86 }
87
88 line6->urb_listen->actual_length = 0;
89 err = usb_submit_urb(line6->urb_listen, GFP_ATOMIC);
90 return err;
91}
92
93
94
95
96static void line6_stop_listen(struct usb_line6 *line6)
97{
98 usb_kill_urb(line6->urb_listen);
99}
100
101
102
103
104static int line6_send_raw_message(struct usb_line6 *line6, const char *buffer,
105 int size)
106{
107 int i, done = 0;
108 const struct line6_properties *properties = line6->properties;
109
110 for (i = 0; i < size; i += line6->max_packet_size) {
111 int partial;
112 const char *frag_buf = buffer + i;
113 int frag_size = min(line6->max_packet_size, size - i);
114 int retval;
115
116 if (properties->capabilities & LINE6_CAP_CONTROL_MIDI) {
117 retval = usb_interrupt_msg(line6->usbdev,
118 usb_sndintpipe(line6->usbdev, properties->ep_ctrl_w),
119 (char *)frag_buf, frag_size,
120 &partial, LINE6_TIMEOUT * HZ);
121 } else {
122 retval = usb_bulk_msg(line6->usbdev,
123 usb_sndbulkpipe(line6->usbdev, properties->ep_ctrl_w),
124 (char *)frag_buf, frag_size,
125 &partial, LINE6_TIMEOUT * HZ);
126 }
127
128 if (retval) {
129 dev_err(line6->ifcdev,
130 "usb_bulk_msg failed (%d)\n", retval);
131 break;
132 }
133
134 done += frag_size;
135 }
136
137 return done;
138}
139
140
141
142
143static void line6_async_request_sent(struct urb *urb)
144{
145 struct message *msg = (struct message *)urb->context;
146
147 if (msg->done >= msg->size) {
148 usb_free_urb(urb);
149 kfree(msg);
150 } else
151 line6_send_raw_message_async_part(msg, urb);
152}
153
154
155
156
157static int line6_send_raw_message_async_part(struct message *msg,
158 struct urb *urb)
159{
160 int retval;
161 struct usb_line6 *line6 = msg->line6;
162 int done = msg->done;
163 int bytes = min(msg->size - done, line6->max_packet_size);
164
165 if (line6->properties->capabilities & LINE6_CAP_CONTROL_MIDI) {
166 usb_fill_int_urb(urb, line6->usbdev,
167 usb_sndintpipe(line6->usbdev, line6->properties->ep_ctrl_w),
168 (char *)msg->buffer + done, bytes,
169 line6_async_request_sent, msg, line6->interval);
170 } else {
171 usb_fill_bulk_urb(urb, line6->usbdev,
172 usb_sndbulkpipe(line6->usbdev, line6->properties->ep_ctrl_w),
173 (char *)msg->buffer + done, bytes,
174 line6_async_request_sent, msg);
175 }
176
177 msg->done += bytes;
178
179
180 retval = usb_urb_ep_type_check(urb);
181 if (retval < 0)
182 goto error;
183
184 retval = usb_submit_urb(urb, GFP_ATOMIC);
185 if (retval < 0)
186 goto error;
187
188 return 0;
189
190 error:
191 dev_err(line6->ifcdev, "%s: usb_submit_urb failed (%d)\n",
192 __func__, retval);
193 usb_free_urb(urb);
194 kfree(msg);
195 return retval;
196}
197
198
199
200
201void line6_start_timer(struct timer_list *timer, unsigned long msecs,
202 void (*function)(struct timer_list *t))
203{
204 timer->function = function;
205 mod_timer(timer, jiffies + msecs_to_jiffies(msecs));
206}
207EXPORT_SYMBOL_GPL(line6_start_timer);
208
209
210
211
212int line6_send_raw_message_async(struct usb_line6 *line6, const char *buffer,
213 int size)
214{
215 struct message *msg;
216 struct urb *urb;
217
218
219 msg = kmalloc(sizeof(struct message), GFP_ATOMIC);
220 if (msg == NULL)
221 return -ENOMEM;
222
223
224 urb = usb_alloc_urb(0, GFP_ATOMIC);
225
226 if (urb == NULL) {
227 kfree(msg);
228 return -ENOMEM;
229 }
230
231
232 msg->line6 = line6;
233 msg->buffer = buffer;
234 msg->size = size;
235 msg->done = 0;
236
237
238 return line6_send_raw_message_async_part(msg, urb);
239}
240EXPORT_SYMBOL_GPL(line6_send_raw_message_async);
241
242
243
244
245int line6_version_request_async(struct usb_line6 *line6)
246{
247 char *buffer;
248 int retval;
249
250 buffer = kmemdup(line6_request_version,
251 sizeof(line6_request_version), GFP_ATOMIC);
252 if (buffer == NULL)
253 return -ENOMEM;
254
255 retval = line6_send_raw_message_async(line6, buffer,
256 sizeof(line6_request_version));
257 kfree(buffer);
258 return retval;
259}
260EXPORT_SYMBOL_GPL(line6_version_request_async);
261
262
263
264
265int line6_send_sysex_message(struct usb_line6 *line6, const char *buffer,
266 int size)
267{
268 return line6_send_raw_message(line6, buffer,
269 size + SYSEX_EXTRA_SIZE) -
270 SYSEX_EXTRA_SIZE;
271}
272EXPORT_SYMBOL_GPL(line6_send_sysex_message);
273
274
275
276
277
278
279char *line6_alloc_sysex_buffer(struct usb_line6 *line6, int code1, int code2,
280 int size)
281{
282 char *buffer = kmalloc(size + SYSEX_EXTRA_SIZE, GFP_ATOMIC);
283
284 if (!buffer)
285 return NULL;
286
287 buffer[0] = LINE6_SYSEX_BEGIN;
288 memcpy(buffer + 1, line6_midi_id, sizeof(line6_midi_id));
289 buffer[sizeof(line6_midi_id) + 1] = code1;
290 buffer[sizeof(line6_midi_id) + 2] = code2;
291 buffer[sizeof(line6_midi_id) + 3 + size] = LINE6_SYSEX_END;
292 return buffer;
293}
294EXPORT_SYMBOL_GPL(line6_alloc_sysex_buffer);
295
296
297
298
299static void line6_data_received(struct urb *urb)
300{
301 struct usb_line6 *line6 = (struct usb_line6 *)urb->context;
302 struct midi_buffer *mb = &line6->line6midi->midibuf_in;
303 int done;
304
305 if (urb->status == -ESHUTDOWN)
306 return;
307
308 if (line6->properties->capabilities & LINE6_CAP_CONTROL_MIDI) {
309 done =
310 line6_midibuf_write(mb, urb->transfer_buffer, urb->actual_length);
311
312 if (done < urb->actual_length) {
313 line6_midibuf_ignore(mb, done);
314 dev_dbg(line6->ifcdev, "%d %d buffer overflow - message skipped\n",
315 done, urb->actual_length);
316 }
317
318 for (;;) {
319 done =
320 line6_midibuf_read(mb, line6->buffer_message,
321 LINE6_MIDI_MESSAGE_MAXLEN);
322
323 if (done == 0)
324 break;
325
326 line6->message_length = done;
327 line6_midi_receive(line6, line6->buffer_message, done);
328
329 if (line6->process_message)
330 line6->process_message(line6);
331 }
332 } else {
333 line6->buffer_message = urb->transfer_buffer;
334 line6->message_length = urb->actual_length;
335 if (line6->process_message)
336 line6->process_message(line6);
337 line6->buffer_message = NULL;
338 }
339
340 line6_start_listen(line6);
341}
342
343#define LINE6_READ_WRITE_STATUS_DELAY 2
344#define LINE6_READ_WRITE_MAX_RETRIES 50
345
346
347
348
349int line6_read_data(struct usb_line6 *line6, unsigned address, void *data,
350 unsigned datalen)
351{
352 struct usb_device *usbdev = line6->usbdev;
353 int ret;
354 unsigned char len;
355 unsigned count;
356
357 if (address > 0xffff || datalen > 0xff)
358 return -EINVAL;
359
360
361 ret = usb_control_msg(usbdev, usb_sndctrlpipe(usbdev, 0), 0x67,
362 USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT,
363 (datalen << 8) | 0x21, address,
364 NULL, 0, LINE6_TIMEOUT * HZ);
365
366 if (ret < 0) {
367 dev_err(line6->ifcdev, "read request failed (error %d)\n", ret);
368 return ret;
369 }
370
371
372 for (count = 0; count < LINE6_READ_WRITE_MAX_RETRIES; count++) {
373 mdelay(LINE6_READ_WRITE_STATUS_DELAY);
374
375 ret = usb_control_msg(usbdev, usb_rcvctrlpipe(usbdev, 0), 0x67,
376 USB_TYPE_VENDOR | USB_RECIP_DEVICE |
377 USB_DIR_IN,
378 0x0012, 0x0000, &len, 1,
379 LINE6_TIMEOUT * HZ);
380 if (ret < 0) {
381 dev_err(line6->ifcdev,
382 "receive length failed (error %d)\n", ret);
383 return ret;
384 }
385
386 if (len != 0xff)
387 break;
388 }
389
390 if (len == 0xff) {
391 dev_err(line6->ifcdev, "read failed after %d retries\n",
392 count);
393 return -EIO;
394 } else if (len != datalen) {
395
396 dev_err(line6->ifcdev,
397 "length mismatch (expected %d, got %d)\n",
398 (int)datalen, (int)len);
399 return -EIO;
400 }
401
402
403 ret = usb_control_msg(usbdev, usb_rcvctrlpipe(usbdev, 0), 0x67,
404 USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN,
405 0x0013, 0x0000, data, datalen,
406 LINE6_TIMEOUT * HZ);
407
408 if (ret < 0) {
409 dev_err(line6->ifcdev, "read failed (error %d)\n", ret);
410 return ret;
411 }
412
413 return 0;
414}
415EXPORT_SYMBOL_GPL(line6_read_data);
416
417
418
419
420int line6_write_data(struct usb_line6 *line6, unsigned address, void *data,
421 unsigned datalen)
422{
423 struct usb_device *usbdev = line6->usbdev;
424 int ret;
425 unsigned char status;
426 int count;
427
428 if (address > 0xffff || datalen > 0xffff)
429 return -EINVAL;
430
431 ret = usb_control_msg(usbdev, usb_sndctrlpipe(usbdev, 0), 0x67,
432 USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT,
433 0x0022, address, data, datalen,
434 LINE6_TIMEOUT * HZ);
435
436 if (ret < 0) {
437 dev_err(line6->ifcdev,
438 "write request failed (error %d)\n", ret);
439 return ret;
440 }
441
442 for (count = 0; count < LINE6_READ_WRITE_MAX_RETRIES; count++) {
443 mdelay(LINE6_READ_WRITE_STATUS_DELAY);
444
445 ret = usb_control_msg(usbdev, usb_rcvctrlpipe(usbdev, 0),
446 0x67,
447 USB_TYPE_VENDOR | USB_RECIP_DEVICE |
448 USB_DIR_IN,
449 0x0012, 0x0000,
450 &status, 1, LINE6_TIMEOUT * HZ);
451
452 if (ret < 0) {
453 dev_err(line6->ifcdev,
454 "receiving status failed (error %d)\n", ret);
455 return ret;
456 }
457
458 if (status != 0xff)
459 break;
460 }
461
462 if (status == 0xff) {
463 dev_err(line6->ifcdev, "write failed after %d retries\n",
464 count);
465 return -EIO;
466 } else if (status != 0) {
467 dev_err(line6->ifcdev, "write failed (error %d)\n", ret);
468 return -EIO;
469 }
470
471 return 0;
472}
473EXPORT_SYMBOL_GPL(line6_write_data);
474
475
476
477
478
479int line6_read_serial_number(struct usb_line6 *line6, u32 *serial_number)
480{
481 return line6_read_data(line6, 0x80d0, serial_number,
482 sizeof(*serial_number));
483}
484EXPORT_SYMBOL_GPL(line6_read_serial_number);
485
486
487
488
489static void line6_destruct(struct snd_card *card)
490{
491 struct usb_line6 *line6 = card->private_data;
492 struct usb_device *usbdev = line6->usbdev;
493
494
495
496
497 kfree(line6->buffer_message);
498
499 kfree(line6->buffer_listen);
500
501
502 usb_free_urb(line6->urb_listen);
503 line6->urb_listen = NULL;
504
505
506 usb_put_dev(usbdev);
507}
508
509static void line6_get_usb_properties(struct usb_line6 *line6)
510{
511 struct usb_device *usbdev = line6->usbdev;
512 const struct line6_properties *properties = line6->properties;
513 int pipe;
514 struct usb_host_endpoint *ep = NULL;
515
516 if (properties->capabilities & LINE6_CAP_CONTROL) {
517 if (properties->capabilities & LINE6_CAP_CONTROL_MIDI) {
518 pipe = usb_rcvintpipe(line6->usbdev,
519 line6->properties->ep_ctrl_r);
520 } else {
521 pipe = usb_rcvbulkpipe(line6->usbdev,
522 line6->properties->ep_ctrl_r);
523 }
524 ep = usbdev->ep_in[usb_pipeendpoint(pipe)];
525 }
526
527
528 if (ep) {
529 line6->interval = ep->desc.bInterval;
530 line6->max_packet_size = le16_to_cpu(ep->desc.wMaxPacketSize);
531 } else {
532 if (properties->capabilities & LINE6_CAP_CONTROL) {
533 dev_err(line6->ifcdev,
534 "endpoint not available, using fallback values");
535 }
536 line6->interval = LINE6_FALLBACK_INTERVAL;
537 line6->max_packet_size = LINE6_FALLBACK_MAXPACKETSIZE;
538 }
539
540
541 if (usbdev->speed == USB_SPEED_LOW) {
542 line6->intervals_per_second = USB_LOW_INTERVALS_PER_SECOND;
543 line6->iso_buffers = USB_LOW_ISO_BUFFERS;
544 } else {
545 line6->intervals_per_second = USB_HIGH_INTERVALS_PER_SECOND;
546 line6->iso_buffers = USB_HIGH_ISO_BUFFERS;
547 }
548}
549
550
551static int line6_hwdep_open(struct snd_hwdep *hw, struct file *file)
552{
553 struct usb_line6 *line6 = hw->private_data;
554
555
556
557 line6->messages.active = 1;
558
559 return 0;
560}
561
562
563static int line6_hwdep_release(struct snd_hwdep *hw, struct file *file)
564{
565 struct usb_line6 *line6 = hw->private_data;
566
567 line6->messages.active = 0;
568
569 return 0;
570}
571
572
573static long
574line6_hwdep_read(struct snd_hwdep *hwdep, char __user *buf, long count,
575 loff_t *offset)
576{
577 struct usb_line6 *line6 = hwdep->private_data;
578 long rv = 0;
579 unsigned int out_count;
580
581 if (mutex_lock_interruptible(&line6->messages.read_lock))
582 return -ERESTARTSYS;
583
584 while (kfifo_len(&line6->messages.fifo) == 0) {
585 mutex_unlock(&line6->messages.read_lock);
586
587 rv = wait_event_interruptible(
588 line6->messages.wait_queue,
589 kfifo_len(&line6->messages.fifo) != 0);
590 if (rv < 0)
591 return rv;
592
593 if (mutex_lock_interruptible(&line6->messages.read_lock))
594 return -ERESTARTSYS;
595 }
596
597 if (kfifo_peek_len(&line6->messages.fifo) > count) {
598
599 rv = -EINVAL;
600 } else {
601 rv = kfifo_to_user(&line6->messages.fifo, buf, count, &out_count);
602 if (rv == 0)
603 rv = out_count;
604 }
605
606 mutex_unlock(&line6->messages.read_lock);
607 return rv;
608}
609
610
611static long
612line6_hwdep_write(struct snd_hwdep *hwdep, const char __user *data, long count,
613 loff_t *offset)
614{
615 struct usb_line6 *line6 = hwdep->private_data;
616 int rv;
617 char *data_copy;
618
619 if (count > line6->max_packet_size * LINE6_RAW_MESSAGES_MAXCOUNT) {
620
621 return -EINVAL;
622 }
623
624 data_copy = memdup_user(data, count);
625 if (IS_ERR(data_copy))
626 return PTR_ERR(data_copy);
627
628 rv = line6_send_raw_message(line6, data_copy, count);
629
630 kfree(data_copy);
631 return rv;
632}
633
634static const struct snd_hwdep_ops hwdep_ops = {
635 .open = line6_hwdep_open,
636 .release = line6_hwdep_release,
637 .read = line6_hwdep_read,
638 .write = line6_hwdep_write,
639};
640
641
642static void line6_hwdep_push_message(struct usb_line6 *line6)
643{
644 if (!line6->messages.active)
645 return;
646
647 if (kfifo_avail(&line6->messages.fifo) >= line6->message_length) {
648
649 kfifo_in(&line6->messages.fifo,
650 line6->buffer_message, line6->message_length);
651 }
652
653 wake_up_interruptible(&line6->messages.wait_queue);
654}
655
656static int line6_hwdep_init(struct usb_line6 *line6)
657{
658 int err;
659 struct snd_hwdep *hwdep;
660
661
662 line6->process_message = line6_hwdep_push_message;
663 line6->messages.active = 0;
664 init_waitqueue_head(&line6->messages.wait_queue);
665 mutex_init(&line6->messages.read_lock);
666 INIT_KFIFO(line6->messages.fifo);
667
668 err = snd_hwdep_new(line6->card, "config", 0, &hwdep);
669 if (err < 0)
670 goto end;
671 strcpy(hwdep->name, "config");
672 hwdep->iface = SNDRV_HWDEP_IFACE_LINE6;
673 hwdep->ops = hwdep_ops;
674 hwdep->private_data = line6;
675 hwdep->exclusive = true;
676
677end:
678 return err;
679}
680
681static int line6_init_cap_control(struct usb_line6 *line6)
682{
683 int ret;
684
685
686 line6->buffer_listen = kmalloc(LINE6_BUFSIZE_LISTEN, GFP_KERNEL);
687 if (!line6->buffer_listen)
688 return -ENOMEM;
689
690 line6->urb_listen = usb_alloc_urb(0, GFP_KERNEL);
691 if (!line6->urb_listen)
692 return -ENOMEM;
693
694 if (line6->properties->capabilities & LINE6_CAP_CONTROL_MIDI) {
695 line6->buffer_message = kmalloc(LINE6_MIDI_MESSAGE_MAXLEN, GFP_KERNEL);
696 if (!line6->buffer_message)
697 return -ENOMEM;
698 } else {
699 ret = line6_hwdep_init(line6);
700 if (ret < 0)
701 return ret;
702 }
703
704 ret = line6_start_listen(line6);
705 if (ret < 0) {
706 dev_err(line6->ifcdev, "cannot start listening: %d\n", ret);
707 return ret;
708 }
709
710 return 0;
711}
712
713
714
715
716int line6_probe(struct usb_interface *interface,
717 const struct usb_device_id *id,
718 const char *driver_name,
719 const struct line6_properties *properties,
720 int (*private_init)(struct usb_line6 *, const struct usb_device_id *id),
721 size_t data_size)
722{
723 struct usb_device *usbdev = interface_to_usbdev(interface);
724 struct snd_card *card;
725 struct usb_line6 *line6;
726 int interface_number;
727 int ret;
728
729 if (WARN_ON(data_size < sizeof(*line6)))
730 return -EINVAL;
731
732
733 if (usbdev->descriptor.bNumConfigurations != 1)
734 return -ENODEV;
735
736 ret = snd_card_new(&interface->dev,
737 SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1,
738 THIS_MODULE, data_size, &card);
739 if (ret < 0)
740 return ret;
741
742
743 line6 = card->private_data;
744 line6->card = card;
745 line6->properties = properties;
746 line6->usbdev = usbdev;
747 line6->ifcdev = &interface->dev;
748
749 strcpy(card->id, properties->id);
750 strcpy(card->driver, driver_name);
751 strcpy(card->shortname, properties->name);
752 sprintf(card->longname, "Line 6 %s at USB %s", properties->name,
753 dev_name(line6->ifcdev));
754 card->private_free = line6_destruct;
755
756 usb_set_intfdata(interface, line6);
757
758
759 usb_get_dev(usbdev);
760
761
762 dev_info(&interface->dev, "Line 6 %s found\n", properties->name);
763
764
765 interface_number = interface->cur_altsetting->desc.bInterfaceNumber;
766
767
768 ret = usb_set_interface(usbdev, interface_number,
769 properties->altsetting);
770 if (ret < 0) {
771 dev_err(&interface->dev, "set_interface failed\n");
772 goto error;
773 }
774
775 line6_get_usb_properties(line6);
776
777 if (properties->capabilities & LINE6_CAP_CONTROL) {
778 ret = line6_init_cap_control(line6);
779 if (ret < 0)
780 goto error;
781 }
782
783
784 ret = private_init(line6, id);
785 if (ret < 0)
786 goto error;
787
788
789
790 dev_info(&interface->dev, "Line 6 %s now attached\n",
791 properties->name);
792
793 return 0;
794
795 error:
796
797
798
799 line6_disconnect(interface);
800 return ret;
801}
802EXPORT_SYMBOL_GPL(line6_probe);
803
804
805
806
807void line6_disconnect(struct usb_interface *interface)
808{
809 struct usb_line6 *line6 = usb_get_intfdata(interface);
810 struct usb_device *usbdev = interface_to_usbdev(interface);
811
812 if (!line6)
813 return;
814
815 if (WARN_ON(usbdev != line6->usbdev))
816 return;
817
818 if (line6->urb_listen != NULL)
819 line6_stop_listen(line6);
820
821 snd_card_disconnect(line6->card);
822 if (line6->line6pcm)
823 line6_pcm_disconnect(line6->line6pcm);
824 if (line6->disconnect)
825 line6->disconnect(line6);
826
827 dev_info(&interface->dev, "Line 6 %s now disconnected\n",
828 line6->properties->name);
829
830
831 usb_set_intfdata(interface, NULL);
832
833 snd_card_free_when_closed(line6->card);
834}
835EXPORT_SYMBOL_GPL(line6_disconnect);
836
837#ifdef CONFIG_PM
838
839
840
841
842int line6_suspend(struct usb_interface *interface, pm_message_t message)
843{
844 struct usb_line6 *line6 = usb_get_intfdata(interface);
845 struct snd_line6_pcm *line6pcm = line6->line6pcm;
846
847 snd_power_change_state(line6->card, SNDRV_CTL_POWER_D3hot);
848
849 if (line6->properties->capabilities & LINE6_CAP_CONTROL)
850 line6_stop_listen(line6);
851
852 if (line6pcm != NULL) {
853 snd_pcm_suspend_all(line6pcm->pcm);
854 line6pcm->flags = 0;
855 }
856
857 return 0;
858}
859EXPORT_SYMBOL_GPL(line6_suspend);
860
861
862
863
864int line6_resume(struct usb_interface *interface)
865{
866 struct usb_line6 *line6 = usb_get_intfdata(interface);
867
868 if (line6->properties->capabilities & LINE6_CAP_CONTROL)
869 line6_start_listen(line6);
870
871 snd_power_change_state(line6->card, SNDRV_CTL_POWER_D0);
872 return 0;
873}
874EXPORT_SYMBOL_GPL(line6_resume);
875
876#endif
877
878MODULE_AUTHOR(DRIVER_AUTHOR);
879MODULE_DESCRIPTION(DRIVER_DESC);
880MODULE_LICENSE("GPL");
881
882