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Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
[deliverable/linux.git] / sound / usb / midi.c
1 /*
2 * usbmidi.c - ALSA USB MIDI driver
3 *
4 * Copyright (c) 2002-2009 Clemens Ladisch
5 * All rights reserved.
6 *
7 * Based on the OSS usb-midi driver by NAGANO Daisuke,
8 * NetBSD's umidi driver by Takuya SHIOZAKI,
9 * the "USB Device Class Definition for MIDI Devices" by Roland
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions, and the following disclaimer,
16 * without modification.
17 * 2. The name of the author may not be used to endorse or promote products
18 * derived from this software without specific prior written permission.
19 *
20 * Alternatively, this software may be distributed and/or modified under the
21 * terms of the GNU General Public License as published by the Free Software
22 * Foundation; either version 2 of the License, or (at your option) any later
23 * version.
24 *
25 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
28 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
29 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
35 * SUCH DAMAGE.
36 */
37
38 #include <linux/kernel.h>
39 #include <linux/types.h>
40 #include <linux/bitops.h>
41 #include <linux/interrupt.h>
42 #include <linux/spinlock.h>
43 #include <linux/string.h>
44 #include <linux/init.h>
45 #include <linux/slab.h>
46 #include <linux/timer.h>
47 #include <linux/usb.h>
48 #include <linux/wait.h>
49 #include <linux/usb/audio.h>
50 #include <linux/module.h>
51
52 #include <sound/core.h>
53 #include <sound/control.h>
54 #include <sound/rawmidi.h>
55 #include <sound/asequencer.h>
56 #include "usbaudio.h"
57 #include "midi.h"
58 #include "power.h"
59 #include "helper.h"
60
61 /*
62 * define this to log all USB packets
63 */
64 /* #define DUMP_PACKETS */
65
66 /*
67 * how long to wait after some USB errors, so that khubd can disconnect() us
68 * without too many spurious errors
69 */
70 #define ERROR_DELAY_JIFFIES (HZ / 10)
71
72 #define OUTPUT_URBS 7
73 #define INPUT_URBS 7
74
75
76 MODULE_AUTHOR("Clemens Ladisch <clemens@ladisch.de>");
77 MODULE_DESCRIPTION("USB Audio/MIDI helper module");
78 MODULE_LICENSE("Dual BSD/GPL");
79
80
81 struct usb_ms_header_descriptor {
82 __u8 bLength;
83 __u8 bDescriptorType;
84 __u8 bDescriptorSubtype;
85 __u8 bcdMSC[2];
86 __le16 wTotalLength;
87 } __attribute__ ((packed));
88
89 struct usb_ms_endpoint_descriptor {
90 __u8 bLength;
91 __u8 bDescriptorType;
92 __u8 bDescriptorSubtype;
93 __u8 bNumEmbMIDIJack;
94 __u8 baAssocJackID[0];
95 } __attribute__ ((packed));
96
97 struct snd_usb_midi_in_endpoint;
98 struct snd_usb_midi_out_endpoint;
99 struct snd_usb_midi_endpoint;
100
101 struct usb_protocol_ops {
102 void (*input)(struct snd_usb_midi_in_endpoint*, uint8_t*, int);
103 void (*output)(struct snd_usb_midi_out_endpoint *ep, struct urb *urb);
104 void (*output_packet)(struct urb*, uint8_t, uint8_t, uint8_t, uint8_t);
105 void (*init_out_endpoint)(struct snd_usb_midi_out_endpoint*);
106 void (*finish_out_endpoint)(struct snd_usb_midi_out_endpoint*);
107 };
108
109 struct snd_usb_midi {
110 struct usb_device *dev;
111 struct snd_card *card;
112 struct usb_interface *iface;
113 const struct snd_usb_audio_quirk *quirk;
114 struct snd_rawmidi *rmidi;
115 struct usb_protocol_ops* usb_protocol_ops;
116 struct list_head list;
117 struct timer_list error_timer;
118 spinlock_t disc_lock;
119 struct rw_semaphore disc_rwsem;
120 struct mutex mutex;
121 u32 usb_id;
122 int next_midi_device;
123
124 struct snd_usb_midi_endpoint {
125 struct snd_usb_midi_out_endpoint *out;
126 struct snd_usb_midi_in_endpoint *in;
127 } endpoints[MIDI_MAX_ENDPOINTS];
128 unsigned long input_triggered;
129 unsigned int opened[2];
130 unsigned char disconnected;
131 unsigned char input_running;
132
133 struct snd_kcontrol *roland_load_ctl;
134 };
135
136 struct snd_usb_midi_out_endpoint {
137 struct snd_usb_midi* umidi;
138 struct out_urb_context {
139 struct urb *urb;
140 struct snd_usb_midi_out_endpoint *ep;
141 } urbs[OUTPUT_URBS];
142 unsigned int active_urbs;
143 unsigned int drain_urbs;
144 int max_transfer; /* size of urb buffer */
145 struct tasklet_struct tasklet;
146 unsigned int next_urb;
147 spinlock_t buffer_lock;
148
149 struct usbmidi_out_port {
150 struct snd_usb_midi_out_endpoint* ep;
151 struct snd_rawmidi_substream *substream;
152 int active;
153 uint8_t cable; /* cable number << 4 */
154 uint8_t state;
155 #define STATE_UNKNOWN 0
156 #define STATE_1PARAM 1
157 #define STATE_2PARAM_1 2
158 #define STATE_2PARAM_2 3
159 #define STATE_SYSEX_0 4
160 #define STATE_SYSEX_1 5
161 #define STATE_SYSEX_2 6
162 uint8_t data[2];
163 } ports[0x10];
164 int current_port;
165
166 wait_queue_head_t drain_wait;
167 };
168
169 struct snd_usb_midi_in_endpoint {
170 struct snd_usb_midi* umidi;
171 struct urb* urbs[INPUT_URBS];
172 struct usbmidi_in_port {
173 struct snd_rawmidi_substream *substream;
174 u8 running_status_length;
175 } ports[0x10];
176 u8 seen_f5;
177 u8 error_resubmit;
178 int current_port;
179 };
180
181 static void snd_usbmidi_do_output(struct snd_usb_midi_out_endpoint* ep);
182
183 static const uint8_t snd_usbmidi_cin_length[] = {
184 0, 0, 2, 3, 3, 1, 2, 3, 3, 3, 3, 3, 2, 2, 3, 1
185 };
186
187 /*
188 * Submits the URB, with error handling.
189 */
190 static int snd_usbmidi_submit_urb(struct urb* urb, gfp_t flags)
191 {
192 int err = usb_submit_urb(urb, flags);
193 if (err < 0 && err != -ENODEV)
194 dev_err(&urb->dev->dev, "usb_submit_urb: %d\n", err);
195 return err;
196 }
197
198 /*
199 * Error handling for URB completion functions.
200 */
201 static int snd_usbmidi_urb_error(const struct urb *urb)
202 {
203 switch (urb->status) {
204 /* manually unlinked, or device gone */
205 case -ENOENT:
206 case -ECONNRESET:
207 case -ESHUTDOWN:
208 case -ENODEV:
209 return -ENODEV;
210 /* errors that might occur during unplugging */
211 case -EPROTO:
212 case -ETIME:
213 case -EILSEQ:
214 return -EIO;
215 default:
216 dev_err(&urb->dev->dev, "urb status %d\n", urb->status);
217 return 0; /* continue */
218 }
219 }
220
221 /*
222 * Receives a chunk of MIDI data.
223 */
224 static void snd_usbmidi_input_data(struct snd_usb_midi_in_endpoint* ep, int portidx,
225 uint8_t* data, int length)
226 {
227 struct usbmidi_in_port* port = &ep->ports[portidx];
228
229 if (!port->substream) {
230 dev_dbg(&ep->umidi->dev->dev, "unexpected port %d!\n", portidx);
231 return;
232 }
233 if (!test_bit(port->substream->number, &ep->umidi->input_triggered))
234 return;
235 snd_rawmidi_receive(port->substream, data, length);
236 }
237
238 #ifdef DUMP_PACKETS
239 static void dump_urb(const char *type, const u8 *data, int length)
240 {
241 snd_printk(KERN_DEBUG "%s packet: [", type);
242 for (; length > 0; ++data, --length)
243 printk(" %02x", *data);
244 printk(" ]\n");
245 }
246 #else
247 #define dump_urb(type, data, length) /* nothing */
248 #endif
249
250 /*
251 * Processes the data read from the device.
252 */
253 static void snd_usbmidi_in_urb_complete(struct urb* urb)
254 {
255 struct snd_usb_midi_in_endpoint* ep = urb->context;
256
257 if (urb->status == 0) {
258 dump_urb("received", urb->transfer_buffer, urb->actual_length);
259 ep->umidi->usb_protocol_ops->input(ep, urb->transfer_buffer,
260 urb->actual_length);
261 } else {
262 int err = snd_usbmidi_urb_error(urb);
263 if (err < 0) {
264 if (err != -ENODEV) {
265 ep->error_resubmit = 1;
266 mod_timer(&ep->umidi->error_timer,
267 jiffies + ERROR_DELAY_JIFFIES);
268 }
269 return;
270 }
271 }
272
273 urb->dev = ep->umidi->dev;
274 snd_usbmidi_submit_urb(urb, GFP_ATOMIC);
275 }
276
277 static void snd_usbmidi_out_urb_complete(struct urb* urb)
278 {
279 struct out_urb_context *context = urb->context;
280 struct snd_usb_midi_out_endpoint* ep = context->ep;
281 unsigned int urb_index;
282
283 spin_lock(&ep->buffer_lock);
284 urb_index = context - ep->urbs;
285 ep->active_urbs &= ~(1 << urb_index);
286 if (unlikely(ep->drain_urbs)) {
287 ep->drain_urbs &= ~(1 << urb_index);
288 wake_up(&ep->drain_wait);
289 }
290 spin_unlock(&ep->buffer_lock);
291 if (urb->status < 0) {
292 int err = snd_usbmidi_urb_error(urb);
293 if (err < 0) {
294 if (err != -ENODEV)
295 mod_timer(&ep->umidi->error_timer,
296 jiffies + ERROR_DELAY_JIFFIES);
297 return;
298 }
299 }
300 snd_usbmidi_do_output(ep);
301 }
302
303 /*
304 * This is called when some data should be transferred to the device
305 * (from one or more substreams).
306 */
307 static void snd_usbmidi_do_output(struct snd_usb_midi_out_endpoint* ep)
308 {
309 unsigned int urb_index;
310 struct urb* urb;
311 unsigned long flags;
312
313 spin_lock_irqsave(&ep->buffer_lock, flags);
314 if (ep->umidi->disconnected) {
315 spin_unlock_irqrestore(&ep->buffer_lock, flags);
316 return;
317 }
318
319 urb_index = ep->next_urb;
320 for (;;) {
321 if (!(ep->active_urbs & (1 << urb_index))) {
322 urb = ep->urbs[urb_index].urb;
323 urb->transfer_buffer_length = 0;
324 ep->umidi->usb_protocol_ops->output(ep, urb);
325 if (urb->transfer_buffer_length == 0)
326 break;
327
328 dump_urb("sending", urb->transfer_buffer,
329 urb->transfer_buffer_length);
330 urb->dev = ep->umidi->dev;
331 if (snd_usbmidi_submit_urb(urb, GFP_ATOMIC) < 0)
332 break;
333 ep->active_urbs |= 1 << urb_index;
334 }
335 if (++urb_index >= OUTPUT_URBS)
336 urb_index = 0;
337 if (urb_index == ep->next_urb)
338 break;
339 }
340 ep->next_urb = urb_index;
341 spin_unlock_irqrestore(&ep->buffer_lock, flags);
342 }
343
344 static void snd_usbmidi_out_tasklet(unsigned long data)
345 {
346 struct snd_usb_midi_out_endpoint* ep = (struct snd_usb_midi_out_endpoint *) data;
347
348 snd_usbmidi_do_output(ep);
349 }
350
351 /* called after transfers had been interrupted due to some USB error */
352 static void snd_usbmidi_error_timer(unsigned long data)
353 {
354 struct snd_usb_midi *umidi = (struct snd_usb_midi *)data;
355 unsigned int i, j;
356
357 spin_lock(&umidi->disc_lock);
358 if (umidi->disconnected) {
359 spin_unlock(&umidi->disc_lock);
360 return;
361 }
362 for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i) {
363 struct snd_usb_midi_in_endpoint *in = umidi->endpoints[i].in;
364 if (in && in->error_resubmit) {
365 in->error_resubmit = 0;
366 for (j = 0; j < INPUT_URBS; ++j) {
367 in->urbs[j]->dev = umidi->dev;
368 snd_usbmidi_submit_urb(in->urbs[j], GFP_ATOMIC);
369 }
370 }
371 if (umidi->endpoints[i].out)
372 snd_usbmidi_do_output(umidi->endpoints[i].out);
373 }
374 spin_unlock(&umidi->disc_lock);
375 }
376
377 /* helper function to send static data that may not DMA-able */
378 static int send_bulk_static_data(struct snd_usb_midi_out_endpoint* ep,
379 const void *data, int len)
380 {
381 int err = 0;
382 void *buf = kmemdup(data, len, GFP_KERNEL);
383 if (!buf)
384 return -ENOMEM;
385 dump_urb("sending", buf, len);
386 if (ep->urbs[0].urb)
387 err = usb_bulk_msg(ep->umidi->dev, ep->urbs[0].urb->pipe,
388 buf, len, NULL, 250);
389 kfree(buf);
390 return err;
391 }
392
393 /*
394 * Standard USB MIDI protocol: see the spec.
395 * Midiman protocol: like the standard protocol, but the control byte is the
396 * fourth byte in each packet, and uses length instead of CIN.
397 */
398
399 static void snd_usbmidi_standard_input(struct snd_usb_midi_in_endpoint* ep,
400 uint8_t* buffer, int buffer_length)
401 {
402 int i;
403
404 for (i = 0; i + 3 < buffer_length; i += 4)
405 if (buffer[i] != 0) {
406 int cable = buffer[i] >> 4;
407 int length = snd_usbmidi_cin_length[buffer[i] & 0x0f];
408 snd_usbmidi_input_data(ep, cable, &buffer[i + 1], length);
409 }
410 }
411
412 static void snd_usbmidi_midiman_input(struct snd_usb_midi_in_endpoint* ep,
413 uint8_t* buffer, int buffer_length)
414 {
415 int i;
416
417 for (i = 0; i + 3 < buffer_length; i += 4)
418 if (buffer[i + 3] != 0) {
419 int port = buffer[i + 3] >> 4;
420 int length = buffer[i + 3] & 3;
421 snd_usbmidi_input_data(ep, port, &buffer[i], length);
422 }
423 }
424
425 /*
426 * Buggy M-Audio device: running status on input results in a packet that has
427 * the data bytes but not the status byte and that is marked with CIN 4.
428 */
429 static void snd_usbmidi_maudio_broken_running_status_input(
430 struct snd_usb_midi_in_endpoint* ep,
431 uint8_t* buffer, int buffer_length)
432 {
433 int i;
434
435 for (i = 0; i + 3 < buffer_length; i += 4)
436 if (buffer[i] != 0) {
437 int cable = buffer[i] >> 4;
438 u8 cin = buffer[i] & 0x0f;
439 struct usbmidi_in_port *port = &ep->ports[cable];
440 int length;
441
442 length = snd_usbmidi_cin_length[cin];
443 if (cin == 0xf && buffer[i + 1] >= 0xf8)
444 ; /* realtime msg: no running status change */
445 else if (cin >= 0x8 && cin <= 0xe)
446 /* channel msg */
447 port->running_status_length = length - 1;
448 else if (cin == 0x4 &&
449 port->running_status_length != 0 &&
450 buffer[i + 1] < 0x80)
451 /* CIN 4 that is not a SysEx */
452 length = port->running_status_length;
453 else
454 /*
455 * All other msgs cannot begin running status.
456 * (A channel msg sent as two or three CIN 0xF
457 * packets could in theory, but this device
458 * doesn't use this format.)
459 */
460 port->running_status_length = 0;
461 snd_usbmidi_input_data(ep, cable, &buffer[i + 1], length);
462 }
463 }
464
465 /*
466 * CME protocol: like the standard protocol, but SysEx commands are sent as a
467 * single USB packet preceded by a 0x0F byte.
468 */
469 static void snd_usbmidi_cme_input(struct snd_usb_midi_in_endpoint *ep,
470 uint8_t *buffer, int buffer_length)
471 {
472 if (buffer_length < 2 || (buffer[0] & 0x0f) != 0x0f)
473 snd_usbmidi_standard_input(ep, buffer, buffer_length);
474 else
475 snd_usbmidi_input_data(ep, buffer[0] >> 4,
476 &buffer[1], buffer_length - 1);
477 }
478
479 /*
480 * Adds one USB MIDI packet to the output buffer.
481 */
482 static void snd_usbmidi_output_standard_packet(struct urb* urb, uint8_t p0,
483 uint8_t p1, uint8_t p2, uint8_t p3)
484 {
485
486 uint8_t* buf = (uint8_t*)urb->transfer_buffer + urb->transfer_buffer_length;
487 buf[0] = p0;
488 buf[1] = p1;
489 buf[2] = p2;
490 buf[3] = p3;
491 urb->transfer_buffer_length += 4;
492 }
493
494 /*
495 * Adds one Midiman packet to the output buffer.
496 */
497 static void snd_usbmidi_output_midiman_packet(struct urb* urb, uint8_t p0,
498 uint8_t p1, uint8_t p2, uint8_t p3)
499 {
500
501 uint8_t* buf = (uint8_t*)urb->transfer_buffer + urb->transfer_buffer_length;
502 buf[0] = p1;
503 buf[1] = p2;
504 buf[2] = p3;
505 buf[3] = (p0 & 0xf0) | snd_usbmidi_cin_length[p0 & 0x0f];
506 urb->transfer_buffer_length += 4;
507 }
508
509 /*
510 * Converts MIDI commands to USB MIDI packets.
511 */
512 static void snd_usbmidi_transmit_byte(struct usbmidi_out_port* port,
513 uint8_t b, struct urb* urb)
514 {
515 uint8_t p0 = port->cable;
516 void (*output_packet)(struct urb*, uint8_t, uint8_t, uint8_t, uint8_t) =
517 port->ep->umidi->usb_protocol_ops->output_packet;
518
519 if (b >= 0xf8) {
520 output_packet(urb, p0 | 0x0f, b, 0, 0);
521 } else if (b >= 0xf0) {
522 switch (b) {
523 case 0xf0:
524 port->data[0] = b;
525 port->state = STATE_SYSEX_1;
526 break;
527 case 0xf1:
528 case 0xf3:
529 port->data[0] = b;
530 port->state = STATE_1PARAM;
531 break;
532 case 0xf2:
533 port->data[0] = b;
534 port->state = STATE_2PARAM_1;
535 break;
536 case 0xf4:
537 case 0xf5:
538 port->state = STATE_UNKNOWN;
539 break;
540 case 0xf6:
541 output_packet(urb, p0 | 0x05, 0xf6, 0, 0);
542 port->state = STATE_UNKNOWN;
543 break;
544 case 0xf7:
545 switch (port->state) {
546 case STATE_SYSEX_0:
547 output_packet(urb, p0 | 0x05, 0xf7, 0, 0);
548 break;
549 case STATE_SYSEX_1:
550 output_packet(urb, p0 | 0x06, port->data[0], 0xf7, 0);
551 break;
552 case STATE_SYSEX_2:
553 output_packet(urb, p0 | 0x07, port->data[0], port->data[1], 0xf7);
554 break;
555 }
556 port->state = STATE_UNKNOWN;
557 break;
558 }
559 } else if (b >= 0x80) {
560 port->data[0] = b;
561 if (b >= 0xc0 && b <= 0xdf)
562 port->state = STATE_1PARAM;
563 else
564 port->state = STATE_2PARAM_1;
565 } else { /* b < 0x80 */
566 switch (port->state) {
567 case STATE_1PARAM:
568 if (port->data[0] < 0xf0) {
569 p0 |= port->data[0] >> 4;
570 } else {
571 p0 |= 0x02;
572 port->state = STATE_UNKNOWN;
573 }
574 output_packet(urb, p0, port->data[0], b, 0);
575 break;
576 case STATE_2PARAM_1:
577 port->data[1] = b;
578 port->state = STATE_2PARAM_2;
579 break;
580 case STATE_2PARAM_2:
581 if (port->data[0] < 0xf0) {
582 p0 |= port->data[0] >> 4;
583 port->state = STATE_2PARAM_1;
584 } else {
585 p0 |= 0x03;
586 port->state = STATE_UNKNOWN;
587 }
588 output_packet(urb, p0, port->data[0], port->data[1], b);
589 break;
590 case STATE_SYSEX_0:
591 port->data[0] = b;
592 port->state = STATE_SYSEX_1;
593 break;
594 case STATE_SYSEX_1:
595 port->data[1] = b;
596 port->state = STATE_SYSEX_2;
597 break;
598 case STATE_SYSEX_2:
599 output_packet(urb, p0 | 0x04, port->data[0], port->data[1], b);
600 port->state = STATE_SYSEX_0;
601 break;
602 }
603 }
604 }
605
606 static void snd_usbmidi_standard_output(struct snd_usb_midi_out_endpoint* ep,
607 struct urb *urb)
608 {
609 int p;
610
611 /* FIXME: lower-numbered ports can starve higher-numbered ports */
612 for (p = 0; p < 0x10; ++p) {
613 struct usbmidi_out_port* port = &ep->ports[p];
614 if (!port->active)
615 continue;
616 while (urb->transfer_buffer_length + 3 < ep->max_transfer) {
617 uint8_t b;
618 if (snd_rawmidi_transmit(port->substream, &b, 1) != 1) {
619 port->active = 0;
620 break;
621 }
622 snd_usbmidi_transmit_byte(port, b, urb);
623 }
624 }
625 }
626
627 static struct usb_protocol_ops snd_usbmidi_standard_ops = {
628 .input = snd_usbmidi_standard_input,
629 .output = snd_usbmidi_standard_output,
630 .output_packet = snd_usbmidi_output_standard_packet,
631 };
632
633 static struct usb_protocol_ops snd_usbmidi_midiman_ops = {
634 .input = snd_usbmidi_midiman_input,
635 .output = snd_usbmidi_standard_output,
636 .output_packet = snd_usbmidi_output_midiman_packet,
637 };
638
639 static struct usb_protocol_ops snd_usbmidi_maudio_broken_running_status_ops = {
640 .input = snd_usbmidi_maudio_broken_running_status_input,
641 .output = snd_usbmidi_standard_output,
642 .output_packet = snd_usbmidi_output_standard_packet,
643 };
644
645 static struct usb_protocol_ops snd_usbmidi_cme_ops = {
646 .input = snd_usbmidi_cme_input,
647 .output = snd_usbmidi_standard_output,
648 .output_packet = snd_usbmidi_output_standard_packet,
649 };
650
651 /*
652 * AKAI MPD16 protocol:
653 *
654 * For control port (endpoint 1):
655 * ==============================
656 * One or more chunks consisting of first byte of (0x10 | msg_len) and then a
657 * SysEx message (msg_len=9 bytes long).
658 *
659 * For data port (endpoint 2):
660 * ===========================
661 * One or more chunks consisting of first byte of (0x20 | msg_len) and then a
662 * MIDI message (msg_len bytes long)
663 *
664 * Messages sent: Active Sense, Note On, Poly Pressure, Control Change.
665 */
666 static void snd_usbmidi_akai_input(struct snd_usb_midi_in_endpoint *ep,
667 uint8_t *buffer, int buffer_length)
668 {
669 unsigned int pos = 0;
670 unsigned int len = (unsigned int)buffer_length;
671 while (pos < len) {
672 unsigned int port = (buffer[pos] >> 4) - 1;
673 unsigned int msg_len = buffer[pos] & 0x0f;
674 pos++;
675 if (pos + msg_len <= len && port < 2)
676 snd_usbmidi_input_data(ep, 0, &buffer[pos], msg_len);
677 pos += msg_len;
678 }
679 }
680
681 #define MAX_AKAI_SYSEX_LEN 9
682
683 static void snd_usbmidi_akai_output(struct snd_usb_midi_out_endpoint *ep,
684 struct urb *urb)
685 {
686 uint8_t *msg;
687 int pos, end, count, buf_end;
688 uint8_t tmp[MAX_AKAI_SYSEX_LEN];
689 struct snd_rawmidi_substream *substream = ep->ports[0].substream;
690
691 if (!ep->ports[0].active)
692 return;
693
694 msg = urb->transfer_buffer + urb->transfer_buffer_length;
695 buf_end = ep->max_transfer - MAX_AKAI_SYSEX_LEN - 1;
696
697 /* only try adding more data when there's space for at least 1 SysEx */
698 while (urb->transfer_buffer_length < buf_end) {
699 count = snd_rawmidi_transmit_peek(substream,
700 tmp, MAX_AKAI_SYSEX_LEN);
701 if (!count) {
702 ep->ports[0].active = 0;
703 return;
704 }
705 /* try to skip non-SysEx data */
706 for (pos = 0; pos < count && tmp[pos] != 0xF0; pos++)
707 ;
708
709 if (pos > 0) {
710 snd_rawmidi_transmit_ack(substream, pos);
711 continue;
712 }
713
714 /* look for the start or end marker */
715 for (end = 1; end < count && tmp[end] < 0xF0; end++)
716 ;
717
718 /* next SysEx started before the end of current one */
719 if (end < count && tmp[end] == 0xF0) {
720 /* it's incomplete - drop it */
721 snd_rawmidi_transmit_ack(substream, end);
722 continue;
723 }
724 /* SysEx complete */
725 if (end < count && tmp[end] == 0xF7) {
726 /* queue it, ack it, and get the next one */
727 count = end + 1;
728 msg[0] = 0x10 | count;
729 memcpy(&msg[1], tmp, count);
730 snd_rawmidi_transmit_ack(substream, count);
731 urb->transfer_buffer_length += count + 1;
732 msg += count + 1;
733 continue;
734 }
735 /* less than 9 bytes and no end byte - wait for more */
736 if (count < MAX_AKAI_SYSEX_LEN) {
737 ep->ports[0].active = 0;
738 return;
739 }
740 /* 9 bytes and no end marker in sight - malformed, skip it */
741 snd_rawmidi_transmit_ack(substream, count);
742 }
743 }
744
745 static struct usb_protocol_ops snd_usbmidi_akai_ops = {
746 .input = snd_usbmidi_akai_input,
747 .output = snd_usbmidi_akai_output,
748 };
749
750 /*
751 * Novation USB MIDI protocol: number of data bytes is in the first byte
752 * (when receiving) (+1!) or in the second byte (when sending); data begins
753 * at the third byte.
754 */
755
756 static void snd_usbmidi_novation_input(struct snd_usb_midi_in_endpoint* ep,
757 uint8_t* buffer, int buffer_length)
758 {
759 if (buffer_length < 2 || !buffer[0] || buffer_length < buffer[0] + 1)
760 return;
761 snd_usbmidi_input_data(ep, 0, &buffer[2], buffer[0] - 1);
762 }
763
764 static void snd_usbmidi_novation_output(struct snd_usb_midi_out_endpoint* ep,
765 struct urb *urb)
766 {
767 uint8_t* transfer_buffer;
768 int count;
769
770 if (!ep->ports[0].active)
771 return;
772 transfer_buffer = urb->transfer_buffer;
773 count = snd_rawmidi_transmit(ep->ports[0].substream,
774 &transfer_buffer[2],
775 ep->max_transfer - 2);
776 if (count < 1) {
777 ep->ports[0].active = 0;
778 return;
779 }
780 transfer_buffer[0] = 0;
781 transfer_buffer[1] = count;
782 urb->transfer_buffer_length = 2 + count;
783 }
784
785 static struct usb_protocol_ops snd_usbmidi_novation_ops = {
786 .input = snd_usbmidi_novation_input,
787 .output = snd_usbmidi_novation_output,
788 };
789
790 /*
791 * "raw" protocol: just move raw MIDI bytes from/to the endpoint
792 */
793
794 static void snd_usbmidi_raw_input(struct snd_usb_midi_in_endpoint* ep,
795 uint8_t* buffer, int buffer_length)
796 {
797 snd_usbmidi_input_data(ep, 0, buffer, buffer_length);
798 }
799
800 static void snd_usbmidi_raw_output(struct snd_usb_midi_out_endpoint* ep,
801 struct urb *urb)
802 {
803 int count;
804
805 if (!ep->ports[0].active)
806 return;
807 count = snd_rawmidi_transmit(ep->ports[0].substream,
808 urb->transfer_buffer,
809 ep->max_transfer);
810 if (count < 1) {
811 ep->ports[0].active = 0;
812 return;
813 }
814 urb->transfer_buffer_length = count;
815 }
816
817 static struct usb_protocol_ops snd_usbmidi_raw_ops = {
818 .input = snd_usbmidi_raw_input,
819 .output = snd_usbmidi_raw_output,
820 };
821
822 /*
823 * FTDI protocol: raw MIDI bytes, but input packets have two modem status bytes.
824 */
825
826 static void snd_usbmidi_ftdi_input(struct snd_usb_midi_in_endpoint* ep,
827 uint8_t* buffer, int buffer_length)
828 {
829 if (buffer_length > 2)
830 snd_usbmidi_input_data(ep, 0, buffer + 2, buffer_length - 2);
831 }
832
833 static struct usb_protocol_ops snd_usbmidi_ftdi_ops = {
834 .input = snd_usbmidi_ftdi_input,
835 .output = snd_usbmidi_raw_output,
836 };
837
838 static void snd_usbmidi_us122l_input(struct snd_usb_midi_in_endpoint *ep,
839 uint8_t *buffer, int buffer_length)
840 {
841 if (buffer_length != 9)
842 return;
843 buffer_length = 8;
844 while (buffer_length && buffer[buffer_length - 1] == 0xFD)
845 buffer_length--;
846 if (buffer_length)
847 snd_usbmidi_input_data(ep, 0, buffer, buffer_length);
848 }
849
850 static void snd_usbmidi_us122l_output(struct snd_usb_midi_out_endpoint *ep,
851 struct urb *urb)
852 {
853 int count;
854
855 if (!ep->ports[0].active)
856 return;
857 switch (snd_usb_get_speed(ep->umidi->dev)) {
858 case USB_SPEED_HIGH:
859 case USB_SPEED_SUPER:
860 count = 1;
861 break;
862 default:
863 count = 2;
864 }
865 count = snd_rawmidi_transmit(ep->ports[0].substream,
866 urb->transfer_buffer,
867 count);
868 if (count < 1) {
869 ep->ports[0].active = 0;
870 return;
871 }
872
873 memset(urb->transfer_buffer + count, 0xFD, ep->max_transfer - count);
874 urb->transfer_buffer_length = ep->max_transfer;
875 }
876
877 static struct usb_protocol_ops snd_usbmidi_122l_ops = {
878 .input = snd_usbmidi_us122l_input,
879 .output = snd_usbmidi_us122l_output,
880 };
881
882 /*
883 * Emagic USB MIDI protocol: raw MIDI with "F5 xx" port switching.
884 */
885
886 static void snd_usbmidi_emagic_init_out(struct snd_usb_midi_out_endpoint* ep)
887 {
888 static const u8 init_data[] = {
889 /* initialization magic: "get version" */
890 0xf0,
891 0x00, 0x20, 0x31, /* Emagic */
892 0x64, /* Unitor8 */
893 0x0b, /* version number request */
894 0x00, /* command version */
895 0x00, /* EEPROM, box 0 */
896 0xf7
897 };
898 send_bulk_static_data(ep, init_data, sizeof(init_data));
899 /* while we're at it, pour on more magic */
900 send_bulk_static_data(ep, init_data, sizeof(init_data));
901 }
902
903 static void snd_usbmidi_emagic_finish_out(struct snd_usb_midi_out_endpoint* ep)
904 {
905 static const u8 finish_data[] = {
906 /* switch to patch mode with last preset */
907 0xf0,
908 0x00, 0x20, 0x31, /* Emagic */
909 0x64, /* Unitor8 */
910 0x10, /* patch switch command */
911 0x00, /* command version */
912 0x7f, /* to all boxes */
913 0x40, /* last preset in EEPROM */
914 0xf7
915 };
916 send_bulk_static_data(ep, finish_data, sizeof(finish_data));
917 }
918
919 static void snd_usbmidi_emagic_input(struct snd_usb_midi_in_endpoint* ep,
920 uint8_t* buffer, int buffer_length)
921 {
922 int i;
923
924 /* FF indicates end of valid data */
925 for (i = 0; i < buffer_length; ++i)
926 if (buffer[i] == 0xff) {
927 buffer_length = i;
928 break;
929 }
930
931 /* handle F5 at end of last buffer */
932 if (ep->seen_f5)
933 goto switch_port;
934
935 while (buffer_length > 0) {
936 /* determine size of data until next F5 */
937 for (i = 0; i < buffer_length; ++i)
938 if (buffer[i] == 0xf5)
939 break;
940 snd_usbmidi_input_data(ep, ep->current_port, buffer, i);
941 buffer += i;
942 buffer_length -= i;
943
944 if (buffer_length <= 0)
945 break;
946 /* assert(buffer[0] == 0xf5); */
947 ep->seen_f5 = 1;
948 ++buffer;
949 --buffer_length;
950
951 switch_port:
952 if (buffer_length <= 0)
953 break;
954 if (buffer[0] < 0x80) {
955 ep->current_port = (buffer[0] - 1) & 15;
956 ++buffer;
957 --buffer_length;
958 }
959 ep->seen_f5 = 0;
960 }
961 }
962
963 static void snd_usbmidi_emagic_output(struct snd_usb_midi_out_endpoint* ep,
964 struct urb *urb)
965 {
966 int port0 = ep->current_port;
967 uint8_t* buf = urb->transfer_buffer;
968 int buf_free = ep->max_transfer;
969 int length, i;
970
971 for (i = 0; i < 0x10; ++i) {
972 /* round-robin, starting at the last current port */
973 int portnum = (port0 + i) & 15;
974 struct usbmidi_out_port* port = &ep->ports[portnum];
975
976 if (!port->active)
977 continue;
978 if (snd_rawmidi_transmit_peek(port->substream, buf, 1) != 1) {
979 port->active = 0;
980 continue;
981 }
982
983 if (portnum != ep->current_port) {
984 if (buf_free < 2)
985 break;
986 ep->current_port = portnum;
987 buf[0] = 0xf5;
988 buf[1] = (portnum + 1) & 15;
989 buf += 2;
990 buf_free -= 2;
991 }
992
993 if (buf_free < 1)
994 break;
995 length = snd_rawmidi_transmit(port->substream, buf, buf_free);
996 if (length > 0) {
997 buf += length;
998 buf_free -= length;
999 if (buf_free < 1)
1000 break;
1001 }
1002 }
1003 if (buf_free < ep->max_transfer && buf_free > 0) {
1004 *buf = 0xff;
1005 --buf_free;
1006 }
1007 urb->transfer_buffer_length = ep->max_transfer - buf_free;
1008 }
1009
1010 static struct usb_protocol_ops snd_usbmidi_emagic_ops = {
1011 .input = snd_usbmidi_emagic_input,
1012 .output = snd_usbmidi_emagic_output,
1013 .init_out_endpoint = snd_usbmidi_emagic_init_out,
1014 .finish_out_endpoint = snd_usbmidi_emagic_finish_out,
1015 };
1016
1017
1018 static void update_roland_altsetting(struct snd_usb_midi* umidi)
1019 {
1020 struct usb_interface *intf;
1021 struct usb_host_interface *hostif;
1022 struct usb_interface_descriptor *intfd;
1023 int is_light_load;
1024
1025 intf = umidi->iface;
1026 is_light_load = intf->cur_altsetting != intf->altsetting;
1027 if (umidi->roland_load_ctl->private_value == is_light_load)
1028 return;
1029 hostif = &intf->altsetting[umidi->roland_load_ctl->private_value];
1030 intfd = get_iface_desc(hostif);
1031 snd_usbmidi_input_stop(&umidi->list);
1032 usb_set_interface(umidi->dev, intfd->bInterfaceNumber,
1033 intfd->bAlternateSetting);
1034 snd_usbmidi_input_start(&umidi->list);
1035 }
1036
1037 static int substream_open(struct snd_rawmidi_substream *substream, int dir,
1038 int open)
1039 {
1040 struct snd_usb_midi* umidi = substream->rmidi->private_data;
1041 struct snd_kcontrol *ctl;
1042
1043 down_read(&umidi->disc_rwsem);
1044 if (umidi->disconnected) {
1045 up_read(&umidi->disc_rwsem);
1046 return open ? -ENODEV : 0;
1047 }
1048
1049 mutex_lock(&umidi->mutex);
1050 if (open) {
1051 if (!umidi->opened[0] && !umidi->opened[1]) {
1052 if (umidi->roland_load_ctl) {
1053 ctl = umidi->roland_load_ctl;
1054 ctl->vd[0].access |= SNDRV_CTL_ELEM_ACCESS_INACTIVE;
1055 snd_ctl_notify(umidi->card,
1056 SNDRV_CTL_EVENT_MASK_INFO, &ctl->id);
1057 update_roland_altsetting(umidi);
1058 }
1059 }
1060 umidi->opened[dir]++;
1061 if (umidi->opened[1])
1062 snd_usbmidi_input_start(&umidi->list);
1063 } else {
1064 umidi->opened[dir]--;
1065 if (!umidi->opened[1])
1066 snd_usbmidi_input_stop(&umidi->list);
1067 if (!umidi->opened[0] && !umidi->opened[1]) {
1068 if (umidi->roland_load_ctl) {
1069 ctl = umidi->roland_load_ctl;
1070 ctl->vd[0].access &= ~SNDRV_CTL_ELEM_ACCESS_INACTIVE;
1071 snd_ctl_notify(umidi->card,
1072 SNDRV_CTL_EVENT_MASK_INFO, &ctl->id);
1073 }
1074 }
1075 }
1076 mutex_unlock(&umidi->mutex);
1077 up_read(&umidi->disc_rwsem);
1078 return 0;
1079 }
1080
1081 static int snd_usbmidi_output_open(struct snd_rawmidi_substream *substream)
1082 {
1083 struct snd_usb_midi* umidi = substream->rmidi->private_data;
1084 struct usbmidi_out_port* port = NULL;
1085 int i, j;
1086
1087 for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i)
1088 if (umidi->endpoints[i].out)
1089 for (j = 0; j < 0x10; ++j)
1090 if (umidi->endpoints[i].out->ports[j].substream == substream) {
1091 port = &umidi->endpoints[i].out->ports[j];
1092 break;
1093 }
1094 if (!port) {
1095 snd_BUG();
1096 return -ENXIO;
1097 }
1098
1099 substream->runtime->private_data = port;
1100 port->state = STATE_UNKNOWN;
1101 return substream_open(substream, 0, 1);
1102 }
1103
1104 static int snd_usbmidi_output_close(struct snd_rawmidi_substream *substream)
1105 {
1106 return substream_open(substream, 0, 0);
1107 }
1108
1109 static void snd_usbmidi_output_trigger(struct snd_rawmidi_substream *substream, int up)
1110 {
1111 struct usbmidi_out_port* port = (struct usbmidi_out_port*)substream->runtime->private_data;
1112
1113 port->active = up;
1114 if (up) {
1115 if (port->ep->umidi->disconnected) {
1116 /* gobble up remaining bytes to prevent wait in
1117 * snd_rawmidi_drain_output */
1118 while (!snd_rawmidi_transmit_empty(substream))
1119 snd_rawmidi_transmit_ack(substream, 1);
1120 return;
1121 }
1122 tasklet_schedule(&port->ep->tasklet);
1123 }
1124 }
1125
1126 static void snd_usbmidi_output_drain(struct snd_rawmidi_substream *substream)
1127 {
1128 struct usbmidi_out_port* port = substream->runtime->private_data;
1129 struct snd_usb_midi_out_endpoint *ep = port->ep;
1130 unsigned int drain_urbs;
1131 DEFINE_WAIT(wait);
1132 long timeout = msecs_to_jiffies(50);
1133
1134 if (ep->umidi->disconnected)
1135 return;
1136 /*
1137 * The substream buffer is empty, but some data might still be in the
1138 * currently active URBs, so we have to wait for those to complete.
1139 */
1140 spin_lock_irq(&ep->buffer_lock);
1141 drain_urbs = ep->active_urbs;
1142 if (drain_urbs) {
1143 ep->drain_urbs |= drain_urbs;
1144 do {
1145 prepare_to_wait(&ep->drain_wait, &wait,
1146 TASK_UNINTERRUPTIBLE);
1147 spin_unlock_irq(&ep->buffer_lock);
1148 timeout = schedule_timeout(timeout);
1149 spin_lock_irq(&ep->buffer_lock);
1150 drain_urbs &= ep->drain_urbs;
1151 } while (drain_urbs && timeout);
1152 finish_wait(&ep->drain_wait, &wait);
1153 }
1154 spin_unlock_irq(&ep->buffer_lock);
1155 }
1156
1157 static int snd_usbmidi_input_open(struct snd_rawmidi_substream *substream)
1158 {
1159 return substream_open(substream, 1, 1);
1160 }
1161
1162 static int snd_usbmidi_input_close(struct snd_rawmidi_substream *substream)
1163 {
1164 return substream_open(substream, 1, 0);
1165 }
1166
1167 static void snd_usbmidi_input_trigger(struct snd_rawmidi_substream *substream, int up)
1168 {
1169 struct snd_usb_midi* umidi = substream->rmidi->private_data;
1170
1171 if (up)
1172 set_bit(substream->number, &umidi->input_triggered);
1173 else
1174 clear_bit(substream->number, &umidi->input_triggered);
1175 }
1176
1177 static struct snd_rawmidi_ops snd_usbmidi_output_ops = {
1178 .open = snd_usbmidi_output_open,
1179 .close = snd_usbmidi_output_close,
1180 .trigger = snd_usbmidi_output_trigger,
1181 .drain = snd_usbmidi_output_drain,
1182 };
1183
1184 static struct snd_rawmidi_ops snd_usbmidi_input_ops = {
1185 .open = snd_usbmidi_input_open,
1186 .close = snd_usbmidi_input_close,
1187 .trigger = snd_usbmidi_input_trigger
1188 };
1189
1190 static void free_urb_and_buffer(struct snd_usb_midi *umidi, struct urb *urb,
1191 unsigned int buffer_length)
1192 {
1193 usb_free_coherent(umidi->dev, buffer_length,
1194 urb->transfer_buffer, urb->transfer_dma);
1195 usb_free_urb(urb);
1196 }
1197
1198 /*
1199 * Frees an input endpoint.
1200 * May be called when ep hasn't been initialized completely.
1201 */
1202 static void snd_usbmidi_in_endpoint_delete(struct snd_usb_midi_in_endpoint* ep)
1203 {
1204 unsigned int i;
1205
1206 for (i = 0; i < INPUT_URBS; ++i)
1207 if (ep->urbs[i])
1208 free_urb_and_buffer(ep->umidi, ep->urbs[i],
1209 ep->urbs[i]->transfer_buffer_length);
1210 kfree(ep);
1211 }
1212
1213 /*
1214 * Creates an input endpoint.
1215 */
1216 static int snd_usbmidi_in_endpoint_create(struct snd_usb_midi* umidi,
1217 struct snd_usb_midi_endpoint_info* ep_info,
1218 struct snd_usb_midi_endpoint* rep)
1219 {
1220 struct snd_usb_midi_in_endpoint* ep;
1221 void* buffer;
1222 unsigned int pipe;
1223 int length;
1224 unsigned int i;
1225
1226 rep->in = NULL;
1227 ep = kzalloc(sizeof(*ep), GFP_KERNEL);
1228 if (!ep)
1229 return -ENOMEM;
1230 ep->umidi = umidi;
1231
1232 for (i = 0; i < INPUT_URBS; ++i) {
1233 ep->urbs[i] = usb_alloc_urb(0, GFP_KERNEL);
1234 if (!ep->urbs[i]) {
1235 snd_usbmidi_in_endpoint_delete(ep);
1236 return -ENOMEM;
1237 }
1238 }
1239 if (ep_info->in_interval)
1240 pipe = usb_rcvintpipe(umidi->dev, ep_info->in_ep);
1241 else
1242 pipe = usb_rcvbulkpipe(umidi->dev, ep_info->in_ep);
1243 length = usb_maxpacket(umidi->dev, pipe, 0);
1244 for (i = 0; i < INPUT_URBS; ++i) {
1245 buffer = usb_alloc_coherent(umidi->dev, length, GFP_KERNEL,
1246 &ep->urbs[i]->transfer_dma);
1247 if (!buffer) {
1248 snd_usbmidi_in_endpoint_delete(ep);
1249 return -ENOMEM;
1250 }
1251 if (ep_info->in_interval)
1252 usb_fill_int_urb(ep->urbs[i], umidi->dev,
1253 pipe, buffer, length,
1254 snd_usbmidi_in_urb_complete,
1255 ep, ep_info->in_interval);
1256 else
1257 usb_fill_bulk_urb(ep->urbs[i], umidi->dev,
1258 pipe, buffer, length,
1259 snd_usbmidi_in_urb_complete, ep);
1260 ep->urbs[i]->transfer_flags = URB_NO_TRANSFER_DMA_MAP;
1261 }
1262
1263 rep->in = ep;
1264 return 0;
1265 }
1266
1267 /*
1268 * Frees an output endpoint.
1269 * May be called when ep hasn't been initialized completely.
1270 */
1271 static void snd_usbmidi_out_endpoint_clear(struct snd_usb_midi_out_endpoint *ep)
1272 {
1273 unsigned int i;
1274
1275 for (i = 0; i < OUTPUT_URBS; ++i)
1276 if (ep->urbs[i].urb) {
1277 free_urb_and_buffer(ep->umidi, ep->urbs[i].urb,
1278 ep->max_transfer);
1279 ep->urbs[i].urb = NULL;
1280 }
1281 }
1282
1283 static void snd_usbmidi_out_endpoint_delete(struct snd_usb_midi_out_endpoint *ep)
1284 {
1285 snd_usbmidi_out_endpoint_clear(ep);
1286 kfree(ep);
1287 }
1288
1289 /*
1290 * Creates an output endpoint, and initializes output ports.
1291 */
1292 static int snd_usbmidi_out_endpoint_create(struct snd_usb_midi* umidi,
1293 struct snd_usb_midi_endpoint_info* ep_info,
1294 struct snd_usb_midi_endpoint* rep)
1295 {
1296 struct snd_usb_midi_out_endpoint* ep;
1297 unsigned int i;
1298 unsigned int pipe;
1299 void* buffer;
1300
1301 rep->out = NULL;
1302 ep = kzalloc(sizeof(*ep), GFP_KERNEL);
1303 if (!ep)
1304 return -ENOMEM;
1305 ep->umidi = umidi;
1306
1307 for (i = 0; i < OUTPUT_URBS; ++i) {
1308 ep->urbs[i].urb = usb_alloc_urb(0, GFP_KERNEL);
1309 if (!ep->urbs[i].urb) {
1310 snd_usbmidi_out_endpoint_delete(ep);
1311 return -ENOMEM;
1312 }
1313 ep->urbs[i].ep = ep;
1314 }
1315 if (ep_info->out_interval)
1316 pipe = usb_sndintpipe(umidi->dev, ep_info->out_ep);
1317 else
1318 pipe = usb_sndbulkpipe(umidi->dev, ep_info->out_ep);
1319 switch (umidi->usb_id) {
1320 default:
1321 ep->max_transfer = usb_maxpacket(umidi->dev, pipe, 1);
1322 break;
1323 /*
1324 * Various chips declare a packet size larger than 4 bytes, but
1325 * do not actually work with larger packets:
1326 */
1327 case USB_ID(0x0a92, 0x1020): /* ESI M4U */
1328 case USB_ID(0x1430, 0x474b): /* RedOctane GH MIDI INTERFACE */
1329 case USB_ID(0x15ca, 0x0101): /* Textech USB Midi Cable */
1330 case USB_ID(0x15ca, 0x1806): /* Textech USB Midi Cable */
1331 case USB_ID(0x1a86, 0x752d): /* QinHeng CH345 "USB2.0-MIDI" */
1332 case USB_ID(0xfc08, 0x0101): /* Unknown vendor Cable */
1333 ep->max_transfer = 4;
1334 break;
1335 /*
1336 * Some devices only work with 9 bytes packet size:
1337 */
1338 case USB_ID(0x0644, 0x800E): /* Tascam US-122L */
1339 case USB_ID(0x0644, 0x800F): /* Tascam US-144 */
1340 ep->max_transfer = 9;
1341 break;
1342 }
1343 for (i = 0; i < OUTPUT_URBS; ++i) {
1344 buffer = usb_alloc_coherent(umidi->dev,
1345 ep->max_transfer, GFP_KERNEL,
1346 &ep->urbs[i].urb->transfer_dma);
1347 if (!buffer) {
1348 snd_usbmidi_out_endpoint_delete(ep);
1349 return -ENOMEM;
1350 }
1351 if (ep_info->out_interval)
1352 usb_fill_int_urb(ep->urbs[i].urb, umidi->dev,
1353 pipe, buffer, ep->max_transfer,
1354 snd_usbmidi_out_urb_complete,
1355 &ep->urbs[i], ep_info->out_interval);
1356 else
1357 usb_fill_bulk_urb(ep->urbs[i].urb, umidi->dev,
1358 pipe, buffer, ep->max_transfer,
1359 snd_usbmidi_out_urb_complete,
1360 &ep->urbs[i]);
1361 ep->urbs[i].urb->transfer_flags = URB_NO_TRANSFER_DMA_MAP;
1362 }
1363
1364 spin_lock_init(&ep->buffer_lock);
1365 tasklet_init(&ep->tasklet, snd_usbmidi_out_tasklet, (unsigned long)ep);
1366 init_waitqueue_head(&ep->drain_wait);
1367
1368 for (i = 0; i < 0x10; ++i)
1369 if (ep_info->out_cables & (1 << i)) {
1370 ep->ports[i].ep = ep;
1371 ep->ports[i].cable = i << 4;
1372 }
1373
1374 if (umidi->usb_protocol_ops->init_out_endpoint)
1375 umidi->usb_protocol_ops->init_out_endpoint(ep);
1376
1377 rep->out = ep;
1378 return 0;
1379 }
1380
1381 /*
1382 * Frees everything.
1383 */
1384 static void snd_usbmidi_free(struct snd_usb_midi* umidi)
1385 {
1386 int i;
1387
1388 for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i) {
1389 struct snd_usb_midi_endpoint* ep = &umidi->endpoints[i];
1390 if (ep->out)
1391 snd_usbmidi_out_endpoint_delete(ep->out);
1392 if (ep->in)
1393 snd_usbmidi_in_endpoint_delete(ep->in);
1394 }
1395 mutex_destroy(&umidi->mutex);
1396 kfree(umidi);
1397 }
1398
1399 /*
1400 * Unlinks all URBs (must be done before the usb_device is deleted).
1401 */
1402 void snd_usbmidi_disconnect(struct list_head* p)
1403 {
1404 struct snd_usb_midi* umidi;
1405 unsigned int i, j;
1406
1407 umidi = list_entry(p, struct snd_usb_midi, list);
1408 /*
1409 * an URB's completion handler may start the timer and
1410 * a timer may submit an URB. To reliably break the cycle
1411 * a flag under lock must be used
1412 */
1413 down_write(&umidi->disc_rwsem);
1414 spin_lock_irq(&umidi->disc_lock);
1415 umidi->disconnected = 1;
1416 spin_unlock_irq(&umidi->disc_lock);
1417 up_write(&umidi->disc_rwsem);
1418
1419 for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i) {
1420 struct snd_usb_midi_endpoint* ep = &umidi->endpoints[i];
1421 if (ep->out)
1422 tasklet_kill(&ep->out->tasklet);
1423 if (ep->out) {
1424 for (j = 0; j < OUTPUT_URBS; ++j)
1425 usb_kill_urb(ep->out->urbs[j].urb);
1426 if (umidi->usb_protocol_ops->finish_out_endpoint)
1427 umidi->usb_protocol_ops->finish_out_endpoint(ep->out);
1428 ep->out->active_urbs = 0;
1429 if (ep->out->drain_urbs) {
1430 ep->out->drain_urbs = 0;
1431 wake_up(&ep->out->drain_wait);
1432 }
1433 }
1434 if (ep->in)
1435 for (j = 0; j < INPUT_URBS; ++j)
1436 usb_kill_urb(ep->in->urbs[j]);
1437 /* free endpoints here; later call can result in Oops */
1438 if (ep->out)
1439 snd_usbmidi_out_endpoint_clear(ep->out);
1440 if (ep->in) {
1441 snd_usbmidi_in_endpoint_delete(ep->in);
1442 ep->in = NULL;
1443 }
1444 }
1445 del_timer_sync(&umidi->error_timer);
1446 }
1447 EXPORT_SYMBOL(snd_usbmidi_disconnect);
1448
1449 static void snd_usbmidi_rawmidi_free(struct snd_rawmidi *rmidi)
1450 {
1451 struct snd_usb_midi* umidi = rmidi->private_data;
1452 snd_usbmidi_free(umidi);
1453 }
1454
1455 static struct snd_rawmidi_substream *snd_usbmidi_find_substream(struct snd_usb_midi* umidi,
1456 int stream, int number)
1457 {
1458 struct snd_rawmidi_substream *substream;
1459
1460 list_for_each_entry(substream, &umidi->rmidi->streams[stream].substreams, list) {
1461 if (substream->number == number)
1462 return substream;
1463 }
1464 return NULL;
1465 }
1466
1467 /*
1468 * This list specifies names for ports that do not fit into the standard
1469 * "(product) MIDI (n)" schema because they aren't external MIDI ports,
1470 * such as internal control or synthesizer ports.
1471 */
1472 static struct port_info {
1473 u32 id;
1474 short int port;
1475 short int voices;
1476 const char *name;
1477 unsigned int seq_flags;
1478 } snd_usbmidi_port_info[] = {
1479 #define PORT_INFO(vendor, product, num, name_, voices_, flags) \
1480 { .id = USB_ID(vendor, product), \
1481 .port = num, .voices = voices_, \
1482 .name = name_, .seq_flags = flags }
1483 #define EXTERNAL_PORT(vendor, product, num, name) \
1484 PORT_INFO(vendor, product, num, name, 0, \
1485 SNDRV_SEQ_PORT_TYPE_MIDI_GENERIC | \
1486 SNDRV_SEQ_PORT_TYPE_HARDWARE | \
1487 SNDRV_SEQ_PORT_TYPE_PORT)
1488 #define CONTROL_PORT(vendor, product, num, name) \
1489 PORT_INFO(vendor, product, num, name, 0, \
1490 SNDRV_SEQ_PORT_TYPE_MIDI_GENERIC | \
1491 SNDRV_SEQ_PORT_TYPE_HARDWARE)
1492 #define ROLAND_SYNTH_PORT(vendor, product, num, name, voices) \
1493 PORT_INFO(vendor, product, num, name, voices, \
1494 SNDRV_SEQ_PORT_TYPE_MIDI_GENERIC | \
1495 SNDRV_SEQ_PORT_TYPE_MIDI_GM | \
1496 SNDRV_SEQ_PORT_TYPE_MIDI_GM2 | \
1497 SNDRV_SEQ_PORT_TYPE_MIDI_GS | \
1498 SNDRV_SEQ_PORT_TYPE_MIDI_XG | \
1499 SNDRV_SEQ_PORT_TYPE_HARDWARE | \
1500 SNDRV_SEQ_PORT_TYPE_SYNTHESIZER)
1501 #define SOUNDCANVAS_PORT(vendor, product, num, name, voices) \
1502 PORT_INFO(vendor, product, num, name, voices, \
1503 SNDRV_SEQ_PORT_TYPE_MIDI_GENERIC | \
1504 SNDRV_SEQ_PORT_TYPE_MIDI_GM | \
1505 SNDRV_SEQ_PORT_TYPE_MIDI_GM2 | \
1506 SNDRV_SEQ_PORT_TYPE_MIDI_GS | \
1507 SNDRV_SEQ_PORT_TYPE_MIDI_XG | \
1508 SNDRV_SEQ_PORT_TYPE_MIDI_MT32 | \
1509 SNDRV_SEQ_PORT_TYPE_HARDWARE | \
1510 SNDRV_SEQ_PORT_TYPE_SYNTHESIZER)
1511 /* Roland UA-100 */
1512 CONTROL_PORT(0x0582, 0x0000, 2, "%s Control"),
1513 /* Roland SC-8850 */
1514 SOUNDCANVAS_PORT(0x0582, 0x0003, 0, "%s Part A", 128),
1515 SOUNDCANVAS_PORT(0x0582, 0x0003, 1, "%s Part B", 128),
1516 SOUNDCANVAS_PORT(0x0582, 0x0003, 2, "%s Part C", 128),
1517 SOUNDCANVAS_PORT(0x0582, 0x0003, 3, "%s Part D", 128),
1518 EXTERNAL_PORT(0x0582, 0x0003, 4, "%s MIDI 1"),
1519 EXTERNAL_PORT(0x0582, 0x0003, 5, "%s MIDI 2"),
1520 /* Roland U-8 */
1521 EXTERNAL_PORT(0x0582, 0x0004, 0, "%s MIDI"),
1522 CONTROL_PORT(0x0582, 0x0004, 1, "%s Control"),
1523 /* Roland SC-8820 */
1524 SOUNDCANVAS_PORT(0x0582, 0x0007, 0, "%s Part A", 64),
1525 SOUNDCANVAS_PORT(0x0582, 0x0007, 1, "%s Part B", 64),
1526 EXTERNAL_PORT(0x0582, 0x0007, 2, "%s MIDI"),
1527 /* Roland SK-500 */
1528 SOUNDCANVAS_PORT(0x0582, 0x000b, 0, "%s Part A", 64),
1529 SOUNDCANVAS_PORT(0x0582, 0x000b, 1, "%s Part B", 64),
1530 EXTERNAL_PORT(0x0582, 0x000b, 2, "%s MIDI"),
1531 /* Roland SC-D70 */
1532 SOUNDCANVAS_PORT(0x0582, 0x000c, 0, "%s Part A", 64),
1533 SOUNDCANVAS_PORT(0x0582, 0x000c, 1, "%s Part B", 64),
1534 EXTERNAL_PORT(0x0582, 0x000c, 2, "%s MIDI"),
1535 /* Edirol UM-880 */
1536 CONTROL_PORT(0x0582, 0x0014, 8, "%s Control"),
1537 /* Edirol SD-90 */
1538 ROLAND_SYNTH_PORT(0x0582, 0x0016, 0, "%s Part A", 128),
1539 ROLAND_SYNTH_PORT(0x0582, 0x0016, 1, "%s Part B", 128),
1540 EXTERNAL_PORT(0x0582, 0x0016, 2, "%s MIDI 1"),
1541 EXTERNAL_PORT(0x0582, 0x0016, 3, "%s MIDI 2"),
1542 /* Edirol UM-550 */
1543 CONTROL_PORT(0x0582, 0x0023, 5, "%s Control"),
1544 /* Edirol SD-20 */
1545 ROLAND_SYNTH_PORT(0x0582, 0x0027, 0, "%s Part A", 64),
1546 ROLAND_SYNTH_PORT(0x0582, 0x0027, 1, "%s Part B", 64),
1547 EXTERNAL_PORT(0x0582, 0x0027, 2, "%s MIDI"),
1548 /* Edirol SD-80 */
1549 ROLAND_SYNTH_PORT(0x0582, 0x0029, 0, "%s Part A", 128),
1550 ROLAND_SYNTH_PORT(0x0582, 0x0029, 1, "%s Part B", 128),
1551 EXTERNAL_PORT(0x0582, 0x0029, 2, "%s MIDI 1"),
1552 EXTERNAL_PORT(0x0582, 0x0029, 3, "%s MIDI 2"),
1553 /* Edirol UA-700 */
1554 EXTERNAL_PORT(0x0582, 0x002b, 0, "%s MIDI"),
1555 CONTROL_PORT(0x0582, 0x002b, 1, "%s Control"),
1556 /* Roland VariOS */
1557 EXTERNAL_PORT(0x0582, 0x002f, 0, "%s MIDI"),
1558 EXTERNAL_PORT(0x0582, 0x002f, 1, "%s External MIDI"),
1559 EXTERNAL_PORT(0x0582, 0x002f, 2, "%s Sync"),
1560 /* Edirol PCR */
1561 EXTERNAL_PORT(0x0582, 0x0033, 0, "%s MIDI"),
1562 EXTERNAL_PORT(0x0582, 0x0033, 1, "%s 1"),
1563 EXTERNAL_PORT(0x0582, 0x0033, 2, "%s 2"),
1564 /* BOSS GS-10 */
1565 EXTERNAL_PORT(0x0582, 0x003b, 0, "%s MIDI"),
1566 CONTROL_PORT(0x0582, 0x003b, 1, "%s Control"),
1567 /* Edirol UA-1000 */
1568 EXTERNAL_PORT(0x0582, 0x0044, 0, "%s MIDI"),
1569 CONTROL_PORT(0x0582, 0x0044, 1, "%s Control"),
1570 /* Edirol UR-80 */
1571 EXTERNAL_PORT(0x0582, 0x0048, 0, "%s MIDI"),
1572 EXTERNAL_PORT(0x0582, 0x0048, 1, "%s 1"),
1573 EXTERNAL_PORT(0x0582, 0x0048, 2, "%s 2"),
1574 /* Edirol PCR-A */
1575 EXTERNAL_PORT(0x0582, 0x004d, 0, "%s MIDI"),
1576 EXTERNAL_PORT(0x0582, 0x004d, 1, "%s 1"),
1577 EXTERNAL_PORT(0x0582, 0x004d, 2, "%s 2"),
1578 /* BOSS GT-PRO */
1579 CONTROL_PORT(0x0582, 0x0089, 0, "%s Control"),
1580 /* Edirol UM-3EX */
1581 CONTROL_PORT(0x0582, 0x009a, 3, "%s Control"),
1582 /* Roland VG-99 */
1583 CONTROL_PORT(0x0582, 0x00b2, 0, "%s Control"),
1584 EXTERNAL_PORT(0x0582, 0x00b2, 1, "%s MIDI"),
1585 /* Cakewalk Sonar V-Studio 100 */
1586 EXTERNAL_PORT(0x0582, 0x00eb, 0, "%s MIDI"),
1587 CONTROL_PORT(0x0582, 0x00eb, 1, "%s Control"),
1588 /* Roland VB-99 */
1589 CONTROL_PORT(0x0582, 0x0102, 0, "%s Control"),
1590 EXTERNAL_PORT(0x0582, 0x0102, 1, "%s MIDI"),
1591 /* Roland A-PRO */
1592 EXTERNAL_PORT(0x0582, 0x010f, 0, "%s MIDI"),
1593 CONTROL_PORT(0x0582, 0x010f, 1, "%s 1"),
1594 CONTROL_PORT(0x0582, 0x010f, 2, "%s 2"),
1595 /* Roland SD-50 */
1596 ROLAND_SYNTH_PORT(0x0582, 0x0114, 0, "%s Synth", 128),
1597 EXTERNAL_PORT(0x0582, 0x0114, 1, "%s MIDI"),
1598 CONTROL_PORT(0x0582, 0x0114, 2, "%s Control"),
1599 /* Roland OCTA-CAPTURE */
1600 EXTERNAL_PORT(0x0582, 0x0120, 0, "%s MIDI"),
1601 CONTROL_PORT(0x0582, 0x0120, 1, "%s Control"),
1602 EXTERNAL_PORT(0x0582, 0x0121, 0, "%s MIDI"),
1603 CONTROL_PORT(0x0582, 0x0121, 1, "%s Control"),
1604 /* Roland SPD-SX */
1605 CONTROL_PORT(0x0582, 0x0145, 0, "%s Control"),
1606 EXTERNAL_PORT(0x0582, 0x0145, 1, "%s MIDI"),
1607 /* Roland A-Series */
1608 CONTROL_PORT(0x0582, 0x0156, 0, "%s Keyboard"),
1609 EXTERNAL_PORT(0x0582, 0x0156, 1, "%s MIDI"),
1610 /* Roland INTEGRA-7 */
1611 ROLAND_SYNTH_PORT(0x0582, 0x015b, 0, "%s Synth", 128),
1612 CONTROL_PORT(0x0582, 0x015b, 1, "%s Control"),
1613 /* M-Audio MidiSport 8x8 */
1614 CONTROL_PORT(0x0763, 0x1031, 8, "%s Control"),
1615 CONTROL_PORT(0x0763, 0x1033, 8, "%s Control"),
1616 /* MOTU Fastlane */
1617 EXTERNAL_PORT(0x07fd, 0x0001, 0, "%s MIDI A"),
1618 EXTERNAL_PORT(0x07fd, 0x0001, 1, "%s MIDI B"),
1619 /* Emagic Unitor8/AMT8/MT4 */
1620 EXTERNAL_PORT(0x086a, 0x0001, 8, "%s Broadcast"),
1621 EXTERNAL_PORT(0x086a, 0x0002, 8, "%s Broadcast"),
1622 EXTERNAL_PORT(0x086a, 0x0003, 4, "%s Broadcast"),
1623 /* Akai MPD16 */
1624 CONTROL_PORT(0x09e8, 0x0062, 0, "%s Control"),
1625 PORT_INFO(0x09e8, 0x0062, 1, "%s MIDI", 0,
1626 SNDRV_SEQ_PORT_TYPE_MIDI_GENERIC |
1627 SNDRV_SEQ_PORT_TYPE_HARDWARE),
1628 /* Access Music Virus TI */
1629 EXTERNAL_PORT(0x133e, 0x0815, 0, "%s MIDI"),
1630 PORT_INFO(0x133e, 0x0815, 1, "%s Synth", 0,
1631 SNDRV_SEQ_PORT_TYPE_MIDI_GENERIC |
1632 SNDRV_SEQ_PORT_TYPE_HARDWARE |
1633 SNDRV_SEQ_PORT_TYPE_SYNTHESIZER),
1634 };
1635
1636 static struct port_info *find_port_info(struct snd_usb_midi* umidi, int number)
1637 {
1638 int i;
1639
1640 for (i = 0; i < ARRAY_SIZE(snd_usbmidi_port_info); ++i) {
1641 if (snd_usbmidi_port_info[i].id == umidi->usb_id &&
1642 snd_usbmidi_port_info[i].port == number)
1643 return &snd_usbmidi_port_info[i];
1644 }
1645 return NULL;
1646 }
1647
1648 static void snd_usbmidi_get_port_info(struct snd_rawmidi *rmidi, int number,
1649 struct snd_seq_port_info *seq_port_info)
1650 {
1651 struct snd_usb_midi *umidi = rmidi->private_data;
1652 struct port_info *port_info;
1653
1654 /* TODO: read port flags from descriptors */
1655 port_info = find_port_info(umidi, number);
1656 if (port_info) {
1657 seq_port_info->type = port_info->seq_flags;
1658 seq_port_info->midi_voices = port_info->voices;
1659 }
1660 }
1661
1662 static void snd_usbmidi_init_substream(struct snd_usb_midi* umidi,
1663 int stream, int number,
1664 struct snd_rawmidi_substream ** rsubstream)
1665 {
1666 struct port_info *port_info;
1667 const char *name_format;
1668
1669 struct snd_rawmidi_substream *substream = snd_usbmidi_find_substream(umidi, stream, number);
1670 if (!substream) {
1671 dev_err(&umidi->dev->dev, "substream %d:%d not found\n", stream, number);
1672 return;
1673 }
1674
1675 /* TODO: read port name from jack descriptor */
1676 port_info = find_port_info(umidi, number);
1677 name_format = port_info ? port_info->name : "%s MIDI %d";
1678 snprintf(substream->name, sizeof(substream->name),
1679 name_format, umidi->card->shortname, number + 1);
1680
1681 *rsubstream = substream;
1682 }
1683
1684 /*
1685 * Creates the endpoints and their ports.
1686 */
1687 static int snd_usbmidi_create_endpoints(struct snd_usb_midi* umidi,
1688 struct snd_usb_midi_endpoint_info* endpoints)
1689 {
1690 int i, j, err;
1691 int out_ports = 0, in_ports = 0;
1692
1693 for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i) {
1694 if (endpoints[i].out_cables) {
1695 err = snd_usbmidi_out_endpoint_create(umidi, &endpoints[i],
1696 &umidi->endpoints[i]);
1697 if (err < 0)
1698 return err;
1699 }
1700 if (endpoints[i].in_cables) {
1701 err = snd_usbmidi_in_endpoint_create(umidi, &endpoints[i],
1702 &umidi->endpoints[i]);
1703 if (err < 0)
1704 return err;
1705 }
1706
1707 for (j = 0; j < 0x10; ++j) {
1708 if (endpoints[i].out_cables & (1 << j)) {
1709 snd_usbmidi_init_substream(umidi, SNDRV_RAWMIDI_STREAM_OUTPUT, out_ports,
1710 &umidi->endpoints[i].out->ports[j].substream);
1711 ++out_ports;
1712 }
1713 if (endpoints[i].in_cables & (1 << j)) {
1714 snd_usbmidi_init_substream(umidi, SNDRV_RAWMIDI_STREAM_INPUT, in_ports,
1715 &umidi->endpoints[i].in->ports[j].substream);
1716 ++in_ports;
1717 }
1718 }
1719 }
1720 dev_dbg(&umidi->dev->dev, "created %d output and %d input ports\n",
1721 out_ports, in_ports);
1722 return 0;
1723 }
1724
1725 /*
1726 * Returns MIDIStreaming device capabilities.
1727 */
1728 static int snd_usbmidi_get_ms_info(struct snd_usb_midi* umidi,
1729 struct snd_usb_midi_endpoint_info* endpoints)
1730 {
1731 struct usb_interface* intf;
1732 struct usb_host_interface *hostif;
1733 struct usb_interface_descriptor* intfd;
1734 struct usb_ms_header_descriptor* ms_header;
1735 struct usb_host_endpoint *hostep;
1736 struct usb_endpoint_descriptor* ep;
1737 struct usb_ms_endpoint_descriptor* ms_ep;
1738 int i, epidx;
1739
1740 intf = umidi->iface;
1741 if (!intf)
1742 return -ENXIO;
1743 hostif = &intf->altsetting[0];
1744 intfd = get_iface_desc(hostif);
1745 ms_header = (struct usb_ms_header_descriptor*)hostif->extra;
1746 if (hostif->extralen >= 7 &&
1747 ms_header->bLength >= 7 &&
1748 ms_header->bDescriptorType == USB_DT_CS_INTERFACE &&
1749 ms_header->bDescriptorSubtype == UAC_HEADER)
1750 dev_dbg(&umidi->dev->dev, "MIDIStreaming version %02x.%02x\n",
1751 ms_header->bcdMSC[1], ms_header->bcdMSC[0]);
1752 else
1753 dev_warn(&umidi->dev->dev,
1754 "MIDIStreaming interface descriptor not found\n");
1755
1756 epidx = 0;
1757 for (i = 0; i < intfd->bNumEndpoints; ++i) {
1758 hostep = &hostif->endpoint[i];
1759 ep = get_ep_desc(hostep);
1760 if (!usb_endpoint_xfer_bulk(ep) && !usb_endpoint_xfer_int(ep))
1761 continue;
1762 ms_ep = (struct usb_ms_endpoint_descriptor*)hostep->extra;
1763 if (hostep->extralen < 4 ||
1764 ms_ep->bLength < 4 ||
1765 ms_ep->bDescriptorType != USB_DT_CS_ENDPOINT ||
1766 ms_ep->bDescriptorSubtype != UAC_MS_GENERAL)
1767 continue;
1768 if (usb_endpoint_dir_out(ep)) {
1769 if (endpoints[epidx].out_ep) {
1770 if (++epidx >= MIDI_MAX_ENDPOINTS) {
1771 dev_warn(&umidi->dev->dev,
1772 "too many endpoints\n");
1773 break;
1774 }
1775 }
1776 endpoints[epidx].out_ep = usb_endpoint_num(ep);
1777 if (usb_endpoint_xfer_int(ep))
1778 endpoints[epidx].out_interval = ep->bInterval;
1779 else if (snd_usb_get_speed(umidi->dev) == USB_SPEED_LOW)
1780 /*
1781 * Low speed bulk transfers don't exist, so
1782 * force interrupt transfers for devices like
1783 * ESI MIDI Mate that try to use them anyway.
1784 */
1785 endpoints[epidx].out_interval = 1;
1786 endpoints[epidx].out_cables = (1 << ms_ep->bNumEmbMIDIJack) - 1;
1787 dev_dbg(&umidi->dev->dev, "EP %02X: %d jack(s)\n",
1788 ep->bEndpointAddress, ms_ep->bNumEmbMIDIJack);
1789 } else {
1790 if (endpoints[epidx].in_ep) {
1791 if (++epidx >= MIDI_MAX_ENDPOINTS) {
1792 dev_warn(&umidi->dev->dev,
1793 "too many endpoints\n");
1794 break;
1795 }
1796 }
1797 endpoints[epidx].in_ep = usb_endpoint_num(ep);
1798 if (usb_endpoint_xfer_int(ep))
1799 endpoints[epidx].in_interval = ep->bInterval;
1800 else if (snd_usb_get_speed(umidi->dev) == USB_SPEED_LOW)
1801 endpoints[epidx].in_interval = 1;
1802 endpoints[epidx].in_cables = (1 << ms_ep->bNumEmbMIDIJack) - 1;
1803 dev_dbg(&umidi->dev->dev, "EP %02X: %d jack(s)\n",
1804 ep->bEndpointAddress, ms_ep->bNumEmbMIDIJack);
1805 }
1806 }
1807 return 0;
1808 }
1809
1810 static int roland_load_info(struct snd_kcontrol *kcontrol,
1811 struct snd_ctl_elem_info *info)
1812 {
1813 static const char *const names[] = { "High Load", "Light Load" };
1814
1815 return snd_ctl_enum_info(info, 1, 2, names);
1816 }
1817
1818 static int roland_load_get(struct snd_kcontrol *kcontrol,
1819 struct snd_ctl_elem_value *value)
1820 {
1821 value->value.enumerated.item[0] = kcontrol->private_value;
1822 return 0;
1823 }
1824
1825 static int roland_load_put(struct snd_kcontrol *kcontrol,
1826 struct snd_ctl_elem_value *value)
1827 {
1828 struct snd_usb_midi* umidi = kcontrol->private_data;
1829 int changed;
1830
1831 if (value->value.enumerated.item[0] > 1)
1832 return -EINVAL;
1833 mutex_lock(&umidi->mutex);
1834 changed = value->value.enumerated.item[0] != kcontrol->private_value;
1835 if (changed)
1836 kcontrol->private_value = value->value.enumerated.item[0];
1837 mutex_unlock(&umidi->mutex);
1838 return changed;
1839 }
1840
1841 static struct snd_kcontrol_new roland_load_ctl = {
1842 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
1843 .name = "MIDI Input Mode",
1844 .info = roland_load_info,
1845 .get = roland_load_get,
1846 .put = roland_load_put,
1847 .private_value = 1,
1848 };
1849
1850 /*
1851 * On Roland devices, use the second alternate setting to be able to use
1852 * the interrupt input endpoint.
1853 */
1854 static void snd_usbmidi_switch_roland_altsetting(struct snd_usb_midi* umidi)
1855 {
1856 struct usb_interface* intf;
1857 struct usb_host_interface *hostif;
1858 struct usb_interface_descriptor* intfd;
1859
1860 intf = umidi->iface;
1861 if (!intf || intf->num_altsetting != 2)
1862 return;
1863
1864 hostif = &intf->altsetting[1];
1865 intfd = get_iface_desc(hostif);
1866 if (intfd->bNumEndpoints != 2 ||
1867 (get_endpoint(hostif, 0)->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) != USB_ENDPOINT_XFER_BULK ||
1868 (get_endpoint(hostif, 1)->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) != USB_ENDPOINT_XFER_INT)
1869 return;
1870
1871 dev_dbg(&umidi->dev->dev, "switching to altsetting %d with int ep\n",
1872 intfd->bAlternateSetting);
1873 usb_set_interface(umidi->dev, intfd->bInterfaceNumber,
1874 intfd->bAlternateSetting);
1875
1876 umidi->roland_load_ctl = snd_ctl_new1(&roland_load_ctl, umidi);
1877 if (snd_ctl_add(umidi->card, umidi->roland_load_ctl) < 0)
1878 umidi->roland_load_ctl = NULL;
1879 }
1880
1881 /*
1882 * Try to find any usable endpoints in the interface.
1883 */
1884 static int snd_usbmidi_detect_endpoints(struct snd_usb_midi* umidi,
1885 struct snd_usb_midi_endpoint_info* endpoint,
1886 int max_endpoints)
1887 {
1888 struct usb_interface* intf;
1889 struct usb_host_interface *hostif;
1890 struct usb_interface_descriptor* intfd;
1891 struct usb_endpoint_descriptor* epd;
1892 int i, out_eps = 0, in_eps = 0;
1893
1894 if (USB_ID_VENDOR(umidi->usb_id) == 0x0582)
1895 snd_usbmidi_switch_roland_altsetting(umidi);
1896
1897 if (endpoint[0].out_ep || endpoint[0].in_ep)
1898 return 0;
1899
1900 intf = umidi->iface;
1901 if (!intf || intf->num_altsetting < 1)
1902 return -ENOENT;
1903 hostif = intf->cur_altsetting;
1904 intfd = get_iface_desc(hostif);
1905
1906 for (i = 0; i < intfd->bNumEndpoints; ++i) {
1907 epd = get_endpoint(hostif, i);
1908 if (!usb_endpoint_xfer_bulk(epd) &&
1909 !usb_endpoint_xfer_int(epd))
1910 continue;
1911 if (out_eps < max_endpoints &&
1912 usb_endpoint_dir_out(epd)) {
1913 endpoint[out_eps].out_ep = usb_endpoint_num(epd);
1914 if (usb_endpoint_xfer_int(epd))
1915 endpoint[out_eps].out_interval = epd->bInterval;
1916 ++out_eps;
1917 }
1918 if (in_eps < max_endpoints &&
1919 usb_endpoint_dir_in(epd)) {
1920 endpoint[in_eps].in_ep = usb_endpoint_num(epd);
1921 if (usb_endpoint_xfer_int(epd))
1922 endpoint[in_eps].in_interval = epd->bInterval;
1923 ++in_eps;
1924 }
1925 }
1926 return (out_eps || in_eps) ? 0 : -ENOENT;
1927 }
1928
1929 /*
1930 * Detects the endpoints for one-port-per-endpoint protocols.
1931 */
1932 static int snd_usbmidi_detect_per_port_endpoints(struct snd_usb_midi* umidi,
1933 struct snd_usb_midi_endpoint_info* endpoints)
1934 {
1935 int err, i;
1936
1937 err = snd_usbmidi_detect_endpoints(umidi, endpoints, MIDI_MAX_ENDPOINTS);
1938 for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i) {
1939 if (endpoints[i].out_ep)
1940 endpoints[i].out_cables = 0x0001;
1941 if (endpoints[i].in_ep)
1942 endpoints[i].in_cables = 0x0001;
1943 }
1944 return err;
1945 }
1946
1947 /*
1948 * Detects the endpoints and ports of Yamaha devices.
1949 */
1950 static int snd_usbmidi_detect_yamaha(struct snd_usb_midi* umidi,
1951 struct snd_usb_midi_endpoint_info* endpoint)
1952 {
1953 struct usb_interface* intf;
1954 struct usb_host_interface *hostif;
1955 struct usb_interface_descriptor* intfd;
1956 uint8_t* cs_desc;
1957
1958 intf = umidi->iface;
1959 if (!intf)
1960 return -ENOENT;
1961 hostif = intf->altsetting;
1962 intfd = get_iface_desc(hostif);
1963 if (intfd->bNumEndpoints < 1)
1964 return -ENOENT;
1965
1966 /*
1967 * For each port there is one MIDI_IN/OUT_JACK descriptor, not
1968 * necessarily with any useful contents. So simply count 'em.
1969 */
1970 for (cs_desc = hostif->extra;
1971 cs_desc < hostif->extra + hostif->extralen && cs_desc[0] >= 2;
1972 cs_desc += cs_desc[0]) {
1973 if (cs_desc[1] == USB_DT_CS_INTERFACE) {
1974 if (cs_desc[2] == UAC_MIDI_IN_JACK)
1975 endpoint->in_cables = (endpoint->in_cables << 1) | 1;
1976 else if (cs_desc[2] == UAC_MIDI_OUT_JACK)
1977 endpoint->out_cables = (endpoint->out_cables << 1) | 1;
1978 }
1979 }
1980 if (!endpoint->in_cables && !endpoint->out_cables)
1981 return -ENOENT;
1982
1983 return snd_usbmidi_detect_endpoints(umidi, endpoint, 1);
1984 }
1985
1986 /*
1987 * Detects the endpoints and ports of Roland devices.
1988 */
1989 static int snd_usbmidi_detect_roland(struct snd_usb_midi* umidi,
1990 struct snd_usb_midi_endpoint_info* endpoint)
1991 {
1992 struct usb_interface* intf;
1993 struct usb_host_interface *hostif;
1994 u8* cs_desc;
1995
1996 intf = umidi->iface;
1997 if (!intf)
1998 return -ENOENT;
1999 hostif = intf->altsetting;
2000 /*
2001 * Some devices have a descriptor <06 24 F1 02 <inputs> <outputs>>,
2002 * some have standard class descriptors, or both kinds, or neither.
2003 */
2004 for (cs_desc = hostif->extra;
2005 cs_desc < hostif->extra + hostif->extralen && cs_desc[0] >= 2;
2006 cs_desc += cs_desc[0]) {
2007 if (cs_desc[0] >= 6 &&
2008 cs_desc[1] == USB_DT_CS_INTERFACE &&
2009 cs_desc[2] == 0xf1 &&
2010 cs_desc[3] == 0x02) {
2011 endpoint->in_cables = (1 << cs_desc[4]) - 1;
2012 endpoint->out_cables = (1 << cs_desc[5]) - 1;
2013 return snd_usbmidi_detect_endpoints(umidi, endpoint, 1);
2014 } else if (cs_desc[0] >= 7 &&
2015 cs_desc[1] == USB_DT_CS_INTERFACE &&
2016 cs_desc[2] == UAC_HEADER) {
2017 return snd_usbmidi_get_ms_info(umidi, endpoint);
2018 }
2019 }
2020
2021 return -ENODEV;
2022 }
2023
2024 /*
2025 * Creates the endpoints and their ports for Midiman devices.
2026 */
2027 static int snd_usbmidi_create_endpoints_midiman(struct snd_usb_midi* umidi,
2028 struct snd_usb_midi_endpoint_info* endpoint)
2029 {
2030 struct snd_usb_midi_endpoint_info ep_info;
2031 struct usb_interface* intf;
2032 struct usb_host_interface *hostif;
2033 struct usb_interface_descriptor* intfd;
2034 struct usb_endpoint_descriptor* epd;
2035 int cable, err;
2036
2037 intf = umidi->iface;
2038 if (!intf)
2039 return -ENOENT;
2040 hostif = intf->altsetting;
2041 intfd = get_iface_desc(hostif);
2042 /*
2043 * The various MidiSport devices have more or less random endpoint
2044 * numbers, so we have to identify the endpoints by their index in
2045 * the descriptor array, like the driver for that other OS does.
2046 *
2047 * There is one interrupt input endpoint for all input ports, one
2048 * bulk output endpoint for even-numbered ports, and one for odd-
2049 * numbered ports. Both bulk output endpoints have corresponding
2050 * input bulk endpoints (at indices 1 and 3) which aren't used.
2051 */
2052 if (intfd->bNumEndpoints < (endpoint->out_cables > 0x0001 ? 5 : 3)) {
2053 dev_dbg(&umidi->dev->dev, "not enough endpoints\n");
2054 return -ENOENT;
2055 }
2056
2057 epd = get_endpoint(hostif, 0);
2058 if (!usb_endpoint_dir_in(epd) || !usb_endpoint_xfer_int(epd)) {
2059 dev_dbg(&umidi->dev->dev, "endpoint[0] isn't interrupt\n");
2060 return -ENXIO;
2061 }
2062 epd = get_endpoint(hostif, 2);
2063 if (!usb_endpoint_dir_out(epd) || !usb_endpoint_xfer_bulk(epd)) {
2064 dev_dbg(&umidi->dev->dev, "endpoint[2] isn't bulk output\n");
2065 return -ENXIO;
2066 }
2067 if (endpoint->out_cables > 0x0001) {
2068 epd = get_endpoint(hostif, 4);
2069 if (!usb_endpoint_dir_out(epd) ||
2070 !usb_endpoint_xfer_bulk(epd)) {
2071 dev_dbg(&umidi->dev->dev, "endpoint[4] isn't bulk output\n");
2072 return -ENXIO;
2073 }
2074 }
2075
2076 ep_info.out_ep = get_endpoint(hostif, 2)->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK;
2077 ep_info.out_interval = 0;
2078 ep_info.out_cables = endpoint->out_cables & 0x5555;
2079 err = snd_usbmidi_out_endpoint_create(umidi, &ep_info, &umidi->endpoints[0]);
2080 if (err < 0)
2081 return err;
2082
2083 ep_info.in_ep = get_endpoint(hostif, 0)->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK;
2084 ep_info.in_interval = get_endpoint(hostif, 0)->bInterval;
2085 ep_info.in_cables = endpoint->in_cables;
2086 err = snd_usbmidi_in_endpoint_create(umidi, &ep_info, &umidi->endpoints[0]);
2087 if (err < 0)
2088 return err;
2089
2090 if (endpoint->out_cables > 0x0001) {
2091 ep_info.out_ep = get_endpoint(hostif, 4)->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK;
2092 ep_info.out_cables = endpoint->out_cables & 0xaaaa;
2093 err = snd_usbmidi_out_endpoint_create(umidi, &ep_info, &umidi->endpoints[1]);
2094 if (err < 0)
2095 return err;
2096 }
2097
2098 for (cable = 0; cable < 0x10; ++cable) {
2099 if (endpoint->out_cables & (1 << cable))
2100 snd_usbmidi_init_substream(umidi, SNDRV_RAWMIDI_STREAM_OUTPUT, cable,
2101 &umidi->endpoints[cable & 1].out->ports[cable].substream);
2102 if (endpoint->in_cables & (1 << cable))
2103 snd_usbmidi_init_substream(umidi, SNDRV_RAWMIDI_STREAM_INPUT, cable,
2104 &umidi->endpoints[0].in->ports[cable].substream);
2105 }
2106 return 0;
2107 }
2108
2109 static struct snd_rawmidi_global_ops snd_usbmidi_ops = {
2110 .get_port_info = snd_usbmidi_get_port_info,
2111 };
2112
2113 static int snd_usbmidi_create_rawmidi(struct snd_usb_midi* umidi,
2114 int out_ports, int in_ports)
2115 {
2116 struct snd_rawmidi *rmidi;
2117 int err;
2118
2119 err = snd_rawmidi_new(umidi->card, "USB MIDI",
2120 umidi->next_midi_device++,
2121 out_ports, in_ports, &rmidi);
2122 if (err < 0)
2123 return err;
2124 strcpy(rmidi->name, umidi->card->shortname);
2125 rmidi->info_flags = SNDRV_RAWMIDI_INFO_OUTPUT |
2126 SNDRV_RAWMIDI_INFO_INPUT |
2127 SNDRV_RAWMIDI_INFO_DUPLEX;
2128 rmidi->ops = &snd_usbmidi_ops;
2129 rmidi->private_data = umidi;
2130 rmidi->private_free = snd_usbmidi_rawmidi_free;
2131 snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT, &snd_usbmidi_output_ops);
2132 snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_INPUT, &snd_usbmidi_input_ops);
2133
2134 umidi->rmidi = rmidi;
2135 return 0;
2136 }
2137
2138 /*
2139 * Temporarily stop input.
2140 */
2141 void snd_usbmidi_input_stop(struct list_head* p)
2142 {
2143 struct snd_usb_midi* umidi;
2144 unsigned int i, j;
2145
2146 umidi = list_entry(p, struct snd_usb_midi, list);
2147 if (!umidi->input_running)
2148 return;
2149 for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i) {
2150 struct snd_usb_midi_endpoint* ep = &umidi->endpoints[i];
2151 if (ep->in)
2152 for (j = 0; j < INPUT_URBS; ++j)
2153 usb_kill_urb(ep->in->urbs[j]);
2154 }
2155 umidi->input_running = 0;
2156 }
2157 EXPORT_SYMBOL(snd_usbmidi_input_stop);
2158
2159 static void snd_usbmidi_input_start_ep(struct snd_usb_midi_in_endpoint* ep)
2160 {
2161 unsigned int i;
2162
2163 if (!ep)
2164 return;
2165 for (i = 0; i < INPUT_URBS; ++i) {
2166 struct urb* urb = ep->urbs[i];
2167 urb->dev = ep->umidi->dev;
2168 snd_usbmidi_submit_urb(urb, GFP_KERNEL);
2169 }
2170 }
2171
2172 /*
2173 * Resume input after a call to snd_usbmidi_input_stop().
2174 */
2175 void snd_usbmidi_input_start(struct list_head* p)
2176 {
2177 struct snd_usb_midi* umidi;
2178 int i;
2179
2180 umidi = list_entry(p, struct snd_usb_midi, list);
2181 if (umidi->input_running || !umidi->opened[1])
2182 return;
2183 for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i)
2184 snd_usbmidi_input_start_ep(umidi->endpoints[i].in);
2185 umidi->input_running = 1;
2186 }
2187 EXPORT_SYMBOL(snd_usbmidi_input_start);
2188
2189 /*
2190 * Creates and registers everything needed for a MIDI streaming interface.
2191 */
2192 int snd_usbmidi_create(struct snd_card *card,
2193 struct usb_interface* iface,
2194 struct list_head *midi_list,
2195 const struct snd_usb_audio_quirk* quirk)
2196 {
2197 struct snd_usb_midi* umidi;
2198 struct snd_usb_midi_endpoint_info endpoints[MIDI_MAX_ENDPOINTS];
2199 int out_ports, in_ports;
2200 int i, err;
2201
2202 umidi = kzalloc(sizeof(*umidi), GFP_KERNEL);
2203 if (!umidi)
2204 return -ENOMEM;
2205 umidi->dev = interface_to_usbdev(iface);
2206 umidi->card = card;
2207 umidi->iface = iface;
2208 umidi->quirk = quirk;
2209 umidi->usb_protocol_ops = &snd_usbmidi_standard_ops;
2210 init_timer(&umidi->error_timer);
2211 spin_lock_init(&umidi->disc_lock);
2212 init_rwsem(&umidi->disc_rwsem);
2213 mutex_init(&umidi->mutex);
2214 umidi->usb_id = USB_ID(le16_to_cpu(umidi->dev->descriptor.idVendor),
2215 le16_to_cpu(umidi->dev->descriptor.idProduct));
2216 umidi->error_timer.function = snd_usbmidi_error_timer;
2217 umidi->error_timer.data = (unsigned long)umidi;
2218
2219 /* detect the endpoint(s) to use */
2220 memset(endpoints, 0, sizeof(endpoints));
2221 switch (quirk ? quirk->type : QUIRK_MIDI_STANDARD_INTERFACE) {
2222 case QUIRK_MIDI_STANDARD_INTERFACE:
2223 err = snd_usbmidi_get_ms_info(umidi, endpoints);
2224 if (umidi->usb_id == USB_ID(0x0763, 0x0150)) /* M-Audio Uno */
2225 umidi->usb_protocol_ops =
2226 &snd_usbmidi_maudio_broken_running_status_ops;
2227 break;
2228 case QUIRK_MIDI_US122L:
2229 umidi->usb_protocol_ops = &snd_usbmidi_122l_ops;
2230 /* fall through */
2231 case QUIRK_MIDI_FIXED_ENDPOINT:
2232 memcpy(&endpoints[0], quirk->data,
2233 sizeof(struct snd_usb_midi_endpoint_info));
2234 err = snd_usbmidi_detect_endpoints(umidi, &endpoints[0], 1);
2235 break;
2236 case QUIRK_MIDI_YAMAHA:
2237 err = snd_usbmidi_detect_yamaha(umidi, &endpoints[0]);
2238 break;
2239 case QUIRK_MIDI_ROLAND:
2240 err = snd_usbmidi_detect_roland(umidi, &endpoints[0]);
2241 break;
2242 case QUIRK_MIDI_MIDIMAN:
2243 umidi->usb_protocol_ops = &snd_usbmidi_midiman_ops;
2244 memcpy(&endpoints[0], quirk->data,
2245 sizeof(struct snd_usb_midi_endpoint_info));
2246 err = 0;
2247 break;
2248 case QUIRK_MIDI_NOVATION:
2249 umidi->usb_protocol_ops = &snd_usbmidi_novation_ops;
2250 err = snd_usbmidi_detect_per_port_endpoints(umidi, endpoints);
2251 break;
2252 case QUIRK_MIDI_RAW_BYTES:
2253 umidi->usb_protocol_ops = &snd_usbmidi_raw_ops;
2254 /*
2255 * Interface 1 contains isochronous endpoints, but with the same
2256 * numbers as in interface 0. Since it is interface 1 that the
2257 * USB core has most recently seen, these descriptors are now
2258 * associated with the endpoint numbers. This will foul up our
2259 * attempts to submit bulk/interrupt URBs to the endpoints in
2260 * interface 0, so we have to make sure that the USB core looks
2261 * again at interface 0 by calling usb_set_interface() on it.
2262 */
2263 if (umidi->usb_id == USB_ID(0x07fd, 0x0001)) /* MOTU Fastlane */
2264 usb_set_interface(umidi->dev, 0, 0);
2265 err = snd_usbmidi_detect_per_port_endpoints(umidi, endpoints);
2266 break;
2267 case QUIRK_MIDI_EMAGIC:
2268 umidi->usb_protocol_ops = &snd_usbmidi_emagic_ops;
2269 memcpy(&endpoints[0], quirk->data,
2270 sizeof(struct snd_usb_midi_endpoint_info));
2271 err = snd_usbmidi_detect_endpoints(umidi, &endpoints[0], 1);
2272 break;
2273 case QUIRK_MIDI_CME:
2274 umidi->usb_protocol_ops = &snd_usbmidi_cme_ops;
2275 err = snd_usbmidi_detect_per_port_endpoints(umidi, endpoints);
2276 break;
2277 case QUIRK_MIDI_AKAI:
2278 umidi->usb_protocol_ops = &snd_usbmidi_akai_ops;
2279 err = snd_usbmidi_detect_per_port_endpoints(umidi, endpoints);
2280 /* endpoint 1 is input-only */
2281 endpoints[1].out_cables = 0;
2282 break;
2283 case QUIRK_MIDI_FTDI:
2284 umidi->usb_protocol_ops = &snd_usbmidi_ftdi_ops;
2285
2286 /* set baud rate to 31250 (48 MHz / 16 / 96) */
2287 err = usb_control_msg(umidi->dev, usb_sndctrlpipe(umidi->dev, 0),
2288 3, 0x40, 0x60, 0, NULL, 0, 1000);
2289 if (err < 0)
2290 break;
2291
2292 err = snd_usbmidi_detect_per_port_endpoints(umidi, endpoints);
2293 break;
2294 default:
2295 dev_err(&umidi->dev->dev, "invalid quirk type %d\n", quirk->type);
2296 err = -ENXIO;
2297 break;
2298 }
2299 if (err < 0) {
2300 kfree(umidi);
2301 return err;
2302 }
2303
2304 /* create rawmidi device */
2305 out_ports = 0;
2306 in_ports = 0;
2307 for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i) {
2308 out_ports += hweight16(endpoints[i].out_cables);
2309 in_ports += hweight16(endpoints[i].in_cables);
2310 }
2311 err = snd_usbmidi_create_rawmidi(umidi, out_ports, in_ports);
2312 if (err < 0) {
2313 kfree(umidi);
2314 return err;
2315 }
2316
2317 /* create endpoint/port structures */
2318 if (quirk && quirk->type == QUIRK_MIDI_MIDIMAN)
2319 err = snd_usbmidi_create_endpoints_midiman(umidi, &endpoints[0]);
2320 else
2321 err = snd_usbmidi_create_endpoints(umidi, endpoints);
2322 if (err < 0) {
2323 snd_usbmidi_free(umidi);
2324 return err;
2325 }
2326
2327 usb_autopm_get_interface_no_resume(umidi->iface);
2328
2329 list_add_tail(&umidi->list, midi_list);
2330 return 0;
2331 }
2332 EXPORT_SYMBOL(snd_usbmidi_create);
Linux kernel - Deliverables
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