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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/usb/midi.h>
51#include <linux/module.h>
52
53#include <sound/core.h>
54#include <sound/control.h>
55#include <sound/rawmidi.h>
56#include <sound/asequencer.h>
57#include "usbaudio.h"
58#include "midi.h"
59#include "power.h"
60#include "helper.h"
61
62/*
63 * define this to log all USB packets
64 */
65/* #define DUMP_PACKETS */
66
67/*
68 * how long to wait after some USB errors, so that hub_wq can disconnect() us
69 * without too many spurious errors
70 */
71#define ERROR_DELAY_JIFFIES (HZ / 10)
72
73#define OUTPUT_URBS 7
74#define INPUT_URBS 7
75
76
77MODULE_AUTHOR("Clemens Ladisch <clemens@ladisch.de>");
78MODULE_DESCRIPTION("USB Audio/MIDI helper module");
79MODULE_LICENSE("Dual BSD/GPL");
80
81struct snd_usb_midi_in_endpoint;
82struct snd_usb_midi_out_endpoint;
83struct snd_usb_midi_endpoint;
84
85struct usb_protocol_ops {
86 void (*input)(struct snd_usb_midi_in_endpoint*, uint8_t*, int);
87 void (*output)(struct snd_usb_midi_out_endpoint *ep, struct urb *urb);
88 void (*output_packet)(struct urb*, uint8_t, uint8_t, uint8_t, uint8_t);
89 void (*init_out_endpoint)(struct snd_usb_midi_out_endpoint *);
90 void (*finish_out_endpoint)(struct snd_usb_midi_out_endpoint *);
91};
92
93struct snd_usb_midi {
94 struct usb_device *dev;
95 struct snd_card *card;
96 struct usb_interface *iface;
97 const struct snd_usb_audio_quirk *quirk;
98 struct snd_rawmidi *rmidi;
99 const struct usb_protocol_ops *usb_protocol_ops;
100 struct list_head list;
101 struct timer_list error_timer;
102 spinlock_t disc_lock;
103 struct rw_semaphore disc_rwsem;
104 struct mutex mutex;
105 u32 usb_id;
106 int next_midi_device;
107
108 struct snd_usb_midi_endpoint {
109 struct snd_usb_midi_out_endpoint *out;
110 struct snd_usb_midi_in_endpoint *in;
111 } endpoints[MIDI_MAX_ENDPOINTS];
112 unsigned long input_triggered;
113 unsigned int opened[2];
114 unsigned char disconnected;
115 unsigned char input_running;
116
117 struct snd_kcontrol *roland_load_ctl;
118};
119
120struct snd_usb_midi_out_endpoint {
121 struct snd_usb_midi *umidi;
122 struct out_urb_context {
123 struct urb *urb;
124 struct snd_usb_midi_out_endpoint *ep;
125 } urbs[OUTPUT_URBS];
126 unsigned int active_urbs;
127 unsigned int drain_urbs;
128 int max_transfer; /* size of urb buffer */
129 struct work_struct work;
130 unsigned int next_urb;
131 spinlock_t buffer_lock;
132
133 struct usbmidi_out_port {
134 struct snd_usb_midi_out_endpoint *ep;
135 struct snd_rawmidi_substream *substream;
136 int active;
137 uint8_t cable; /* cable number << 4 */
138 uint8_t state;
139#define STATE_UNKNOWN 0
140#define STATE_1PARAM 1
141#define STATE_2PARAM_1 2
142#define STATE_2PARAM_2 3
143#define STATE_SYSEX_0 4
144#define STATE_SYSEX_1 5
145#define STATE_SYSEX_2 6
146 uint8_t data[2];
147 } ports[0x10];
148 int current_port;
149
150 wait_queue_head_t drain_wait;
151};
152
153struct snd_usb_midi_in_endpoint {
154 struct snd_usb_midi *umidi;
155 struct urb *urbs[INPUT_URBS];
156 struct usbmidi_in_port {
157 struct snd_rawmidi_substream *substream;
158 u8 running_status_length;
159 } ports[0x10];
160 u8 seen_f5;
161 bool in_sysex;
162 u8 last_cin;
163 u8 error_resubmit;
164 int current_port;
165};
166
167static void snd_usbmidi_do_output(struct snd_usb_midi_out_endpoint *ep);
168
169static const uint8_t snd_usbmidi_cin_length[] = {
170 0, 0, 2, 3, 3, 1, 2, 3, 3, 3, 3, 3, 2, 2, 3, 1
171};
172
173/*
174 * Submits the URB, with error handling.
175 */
176static int snd_usbmidi_submit_urb(struct urb *urb, gfp_t flags)
177{
178 int err = usb_submit_urb(urb, flags);
179 if (err < 0 && err != -ENODEV)
180 dev_err(&urb->dev->dev, "usb_submit_urb: %d\n", err);
181 return err;
182}
183
184/*
185 * Error handling for URB completion functions.
186 */
187static int snd_usbmidi_urb_error(const struct urb *urb)
188{
189 switch (urb->status) {
190 /* manually unlinked, or device gone */
191 case -ENOENT:
192 case -ECONNRESET:
193 case -ESHUTDOWN:
194 case -ENODEV:
195 return -ENODEV;
196 /* errors that might occur during unplugging */
197 case -EPROTO:
198 case -ETIME:
199 case -EILSEQ:
200 return -EIO;
201 default:
202 dev_err(&urb->dev->dev, "urb status %d\n", urb->status);
203 return 0; /* continue */
204 }
205}
206
207/*
208 * Receives a chunk of MIDI data.
209 */
210static void snd_usbmidi_input_data(struct snd_usb_midi_in_endpoint *ep,
211 int portidx, uint8_t *data, int length)
212{
213 struct usbmidi_in_port *port = &ep->ports[portidx];
214
215 if (!port->substream) {
216 dev_dbg(&ep->umidi->dev->dev, "unexpected port %d!\n", portidx);
217 return;
218 }
219 if (!test_bit(port->substream->number, &ep->umidi->input_triggered))
220 return;
221 snd_rawmidi_receive(port->substream, data, length);
222}
223
224#ifdef DUMP_PACKETS
225static void dump_urb(const char *type, const u8 *data, int length)
226{
227 snd_printk(KERN_DEBUG "%s packet: [", type);
228 for (; length > 0; ++data, --length)
229 printk(KERN_CONT " %02x", *data);
230 printk(KERN_CONT " ]\n");
231}
232#else
233#define dump_urb(type, data, length) /* nothing */
234#endif
235
236/*
237 * Processes the data read from the device.
238 */
239static void snd_usbmidi_in_urb_complete(struct urb *urb)
240{
241 struct snd_usb_midi_in_endpoint *ep = urb->context;
242
243 if (urb->status == 0) {
244 dump_urb("received", urb->transfer_buffer, urb->actual_length);
245 ep->umidi->usb_protocol_ops->input(ep, urb->transfer_buffer,
246 urb->actual_length);
247 } else {
248 int err = snd_usbmidi_urb_error(urb);
249 if (err < 0) {
250 if (err != -ENODEV) {
251 ep->error_resubmit = 1;
252 mod_timer(&ep->umidi->error_timer,
253 jiffies + ERROR_DELAY_JIFFIES);
254 }
255 return;
256 }
257 }
258
259 urb->dev = ep->umidi->dev;
260 snd_usbmidi_submit_urb(urb, GFP_ATOMIC);
261}
262
263static void snd_usbmidi_out_urb_complete(struct urb *urb)
264{
265 struct out_urb_context *context = urb->context;
266 struct snd_usb_midi_out_endpoint *ep = context->ep;
267 unsigned int urb_index;
268 unsigned long flags;
269
270 spin_lock_irqsave(&ep->buffer_lock, flags);
271 urb_index = context - ep->urbs;
272 ep->active_urbs &= ~(1 << urb_index);
273 if (unlikely(ep->drain_urbs)) {
274 ep->drain_urbs &= ~(1 << urb_index);
275 wake_up(&ep->drain_wait);
276 }
277 spin_unlock_irqrestore(&ep->buffer_lock, flags);
278 if (urb->status < 0) {
279 int err = snd_usbmidi_urb_error(urb);
280 if (err < 0) {
281 if (err != -ENODEV)
282 mod_timer(&ep->umidi->error_timer,
283 jiffies + ERROR_DELAY_JIFFIES);
284 return;
285 }
286 }
287 snd_usbmidi_do_output(ep);
288}
289
290/*
291 * This is called when some data should be transferred to the device
292 * (from one or more substreams).
293 */
294static void snd_usbmidi_do_output(struct snd_usb_midi_out_endpoint *ep)
295{
296 unsigned int urb_index;
297 struct urb *urb;
298 unsigned long flags;
299
300 spin_lock_irqsave(&ep->buffer_lock, flags);
301 if (ep->umidi->disconnected) {
302 spin_unlock_irqrestore(&ep->buffer_lock, flags);
303 return;
304 }
305
306 urb_index = ep->next_urb;
307 for (;;) {
308 if (!(ep->active_urbs & (1 << urb_index))) {
309 urb = ep->urbs[urb_index].urb;
310 urb->transfer_buffer_length = 0;
311 ep->umidi->usb_protocol_ops->output(ep, urb);
312 if (urb->transfer_buffer_length == 0)
313 break;
314
315 dump_urb("sending", urb->transfer_buffer,
316 urb->transfer_buffer_length);
317 urb->dev = ep->umidi->dev;
318 if (snd_usbmidi_submit_urb(urb, GFP_ATOMIC) < 0)
319 break;
320 ep->active_urbs |= 1 << urb_index;
321 }
322 if (++urb_index >= OUTPUT_URBS)
323 urb_index = 0;
324 if (urb_index == ep->next_urb)
325 break;
326 }
327 ep->next_urb = urb_index;
328 spin_unlock_irqrestore(&ep->buffer_lock, flags);
329}
330
331static void snd_usbmidi_out_work(struct work_struct *work)
332{
333 struct snd_usb_midi_out_endpoint *ep =
334 container_of(work, struct snd_usb_midi_out_endpoint, work);
335
336 snd_usbmidi_do_output(ep);
337}
338
339/* called after transfers had been interrupted due to some USB error */
340static void snd_usbmidi_error_timer(struct timer_list *t)
341{
342 struct snd_usb_midi *umidi = from_timer(umidi, t, error_timer);
343 unsigned int i, j;
344
345 spin_lock(&umidi->disc_lock);
346 if (umidi->disconnected) {
347 spin_unlock(&umidi->disc_lock);
348 return;
349 }
350 for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i) {
351 struct snd_usb_midi_in_endpoint *in = umidi->endpoints[i].in;
352 if (in && in->error_resubmit) {
353 in->error_resubmit = 0;
354 for (j = 0; j < INPUT_URBS; ++j) {
355 if (atomic_read(&in->urbs[j]->use_count))
356 continue;
357 in->urbs[j]->dev = umidi->dev;
358 snd_usbmidi_submit_urb(in->urbs[j], GFP_ATOMIC);
359 }
360 }
361 if (umidi->endpoints[i].out)
362 snd_usbmidi_do_output(umidi->endpoints[i].out);
363 }
364 spin_unlock(&umidi->disc_lock);
365}
366
367/* helper function to send static data that may not DMA-able */
368static int send_bulk_static_data(struct snd_usb_midi_out_endpoint *ep,
369 const void *data, int len)
370{
371 int err = 0;
372 void *buf = kmemdup(data, len, GFP_KERNEL);
373 if (!buf)
374 return -ENOMEM;
375 dump_urb("sending", buf, len);
376 if (ep->urbs[0].urb)
377 err = usb_bulk_msg(ep->umidi->dev, ep->urbs[0].urb->pipe,
378 buf, len, NULL, 250);
379 kfree(buf);
380 return err;
381}
382
383/*
384 * Standard USB MIDI protocol: see the spec.
385 * Midiman protocol: like the standard protocol, but the control byte is the
386 * fourth byte in each packet, and uses length instead of CIN.
387 */
388
389static void snd_usbmidi_standard_input(struct snd_usb_midi_in_endpoint *ep,
390 uint8_t *buffer, int buffer_length)
391{
392 int i;
393
394 for (i = 0; i + 3 < buffer_length; i += 4)
395 if (buffer[i] != 0) {
396 int cable = buffer[i] >> 4;
397 int length = snd_usbmidi_cin_length[buffer[i] & 0x0f];
398 snd_usbmidi_input_data(ep, cable, &buffer[i + 1],
399 length);
400 }
401}
402
403static void snd_usbmidi_midiman_input(struct snd_usb_midi_in_endpoint *ep,
404 uint8_t *buffer, int buffer_length)
405{
406 int i;
407
408 for (i = 0; i + 3 < buffer_length; i += 4)
409 if (buffer[i + 3] != 0) {
410 int port = buffer[i + 3] >> 4;
411 int length = buffer[i + 3] & 3;
412 snd_usbmidi_input_data(ep, port, &buffer[i], length);
413 }
414}
415
416/*
417 * Buggy M-Audio device: running status on input results in a packet that has
418 * the data bytes but not the status byte and that is marked with CIN 4.
419 */
420static void snd_usbmidi_maudio_broken_running_status_input(
421 struct snd_usb_midi_in_endpoint *ep,
422 uint8_t *buffer, int buffer_length)
423{
424 int i;
425
426 for (i = 0; i + 3 < buffer_length; i += 4)
427 if (buffer[i] != 0) {
428 int cable = buffer[i] >> 4;
429 u8 cin = buffer[i] & 0x0f;
430 struct usbmidi_in_port *port = &ep->ports[cable];
431 int length;
432
433 length = snd_usbmidi_cin_length[cin];
434 if (cin == 0xf && buffer[i + 1] >= 0xf8)
435 ; /* realtime msg: no running status change */
436 else if (cin >= 0x8 && cin <= 0xe)
437 /* channel msg */
438 port->running_status_length = length - 1;
439 else if (cin == 0x4 &&
440 port->running_status_length != 0 &&
441 buffer[i + 1] < 0x80)
442 /* CIN 4 that is not a SysEx */
443 length = port->running_status_length;
444 else
445 /*
446 * All other msgs cannot begin running status.
447 * (A channel msg sent as two or three CIN 0xF
448 * packets could in theory, but this device
449 * doesn't use this format.)
450 */
451 port->running_status_length = 0;
452 snd_usbmidi_input_data(ep, cable, &buffer[i + 1],
453 length);
454 }
455}
456
457/*
458 * QinHeng CH345 is buggy: every second packet inside a SysEx has not CIN 4
459 * but the previously seen CIN, but still with three data bytes.
460 */
461static void ch345_broken_sysex_input(struct snd_usb_midi_in_endpoint *ep,
462 uint8_t *buffer, int buffer_length)
463{
464 unsigned int i, cin, length;
465
466 for (i = 0; i + 3 < buffer_length; i += 4) {
467 if (buffer[i] == 0 && i > 0)
468 break;
469 cin = buffer[i] & 0x0f;
470 if (ep->in_sysex &&
471 cin == ep->last_cin &&
472 (buffer[i + 1 + (cin == 0x6)] & 0x80) == 0)
473 cin = 0x4;
474#if 0
475 if (buffer[i + 1] == 0x90) {
476 /*
477 * Either a corrupted running status or a real note-on
478 * message; impossible to detect reliably.
479 */
480 }
481#endif
482 length = snd_usbmidi_cin_length[cin];
483 snd_usbmidi_input_data(ep, 0, &buffer[i + 1], length);
484 ep->in_sysex = cin == 0x4;
485 if (!ep->in_sysex)
486 ep->last_cin = cin;
487 }
488}
489
490/*
491 * CME protocol: like the standard protocol, but SysEx commands are sent as a
492 * single USB packet preceded by a 0x0F byte.
493 */
494static void snd_usbmidi_cme_input(struct snd_usb_midi_in_endpoint *ep,
495 uint8_t *buffer, int buffer_length)
496{
497 if (buffer_length < 2 || (buffer[0] & 0x0f) != 0x0f)
498 snd_usbmidi_standard_input(ep, buffer, buffer_length);
499 else
500 snd_usbmidi_input_data(ep, buffer[0] >> 4,
501 &buffer[1], buffer_length - 1);
502}
503
504/*
505 * Adds one USB MIDI packet to the output buffer.
506 */
507static void snd_usbmidi_output_standard_packet(struct urb *urb, uint8_t p0,
508 uint8_t p1, uint8_t p2,
509 uint8_t p3)
510{
511
512 uint8_t *buf =
513 (uint8_t *)urb->transfer_buffer + urb->transfer_buffer_length;
514 buf[0] = p0;
515 buf[1] = p1;
516 buf[2] = p2;
517 buf[3] = p3;
518 urb->transfer_buffer_length += 4;
519}
520
521/*
522 * Adds one Midiman packet to the output buffer.
523 */
524static void snd_usbmidi_output_midiman_packet(struct urb *urb, uint8_t p0,
525 uint8_t p1, uint8_t p2,
526 uint8_t p3)
527{
528
529 uint8_t *buf =
530 (uint8_t *)urb->transfer_buffer + urb->transfer_buffer_length;
531 buf[0] = p1;
532 buf[1] = p2;
533 buf[2] = p3;
534 buf[3] = (p0 & 0xf0) | snd_usbmidi_cin_length[p0 & 0x0f];
535 urb->transfer_buffer_length += 4;
536}
537
538/*
539 * Converts MIDI commands to USB MIDI packets.
540 */
541static void snd_usbmidi_transmit_byte(struct usbmidi_out_port *port,
542 uint8_t b, struct urb *urb)
543{
544 uint8_t p0 = port->cable;
545 void (*output_packet)(struct urb*, uint8_t, uint8_t, uint8_t, uint8_t) =
546 port->ep->umidi->usb_protocol_ops->output_packet;
547
548 if (b >= 0xf8) {
549 output_packet(urb, p0 | 0x0f, b, 0, 0);
550 } else if (b >= 0xf0) {
551 switch (b) {
552 case 0xf0:
553 port->data[0] = b;
554 port->state = STATE_SYSEX_1;
555 break;
556 case 0xf1:
557 case 0xf3:
558 port->data[0] = b;
559 port->state = STATE_1PARAM;
560 break;
561 case 0xf2:
562 port->data[0] = b;
563 port->state = STATE_2PARAM_1;
564 break;
565 case 0xf4:
566 case 0xf5:
567 port->state = STATE_UNKNOWN;
568 break;
569 case 0xf6:
570 output_packet(urb, p0 | 0x05, 0xf6, 0, 0);
571 port->state = STATE_UNKNOWN;
572 break;
573 case 0xf7:
574 switch (port->state) {
575 case STATE_SYSEX_0:
576 output_packet(urb, p0 | 0x05, 0xf7, 0, 0);
577 break;
578 case STATE_SYSEX_1:
579 output_packet(urb, p0 | 0x06, port->data[0],
580 0xf7, 0);
581 break;
582 case STATE_SYSEX_2:
583 output_packet(urb, p0 | 0x07, port->data[0],
584 port->data[1], 0xf7);
585 break;
586 }
587 port->state = STATE_UNKNOWN;
588 break;
589 }
590 } else if (b >= 0x80) {
591 port->data[0] = b;
592 if (b >= 0xc0 && b <= 0xdf)
593 port->state = STATE_1PARAM;
594 else
595 port->state = STATE_2PARAM_1;
596 } else { /* b < 0x80 */
597 switch (port->state) {
598 case STATE_1PARAM:
599 if (port->data[0] < 0xf0) {
600 p0 |= port->data[0] >> 4;
601 } else {
602 p0 |= 0x02;
603 port->state = STATE_UNKNOWN;
604 }
605 output_packet(urb, p0, port->data[0], b, 0);
606 break;
607 case STATE_2PARAM_1:
608 port->data[1] = b;
609 port->state = STATE_2PARAM_2;
610 break;
611 case STATE_2PARAM_2:
612 if (port->data[0] < 0xf0) {
613 p0 |= port->data[0] >> 4;
614 port->state = STATE_2PARAM_1;
615 } else {
616 p0 |= 0x03;
617 port->state = STATE_UNKNOWN;
618 }
619 output_packet(urb, p0, port->data[0], port->data[1], b);
620 break;
621 case STATE_SYSEX_0:
622 port->data[0] = b;
623 port->state = STATE_SYSEX_1;
624 break;
625 case STATE_SYSEX_1:
626 port->data[1] = b;
627 port->state = STATE_SYSEX_2;
628 break;
629 case STATE_SYSEX_2:
630 output_packet(urb, p0 | 0x04, port->data[0],
631 port->data[1], b);
632 port->state = STATE_SYSEX_0;
633 break;
634 }
635 }
636}
637
638static void snd_usbmidi_standard_output(struct snd_usb_midi_out_endpoint *ep,
639 struct urb *urb)
640{
641 int p;
642
643 /* FIXME: lower-numbered ports can starve higher-numbered ports */
644 for (p = 0; p < 0x10; ++p) {
645 struct usbmidi_out_port *port = &ep->ports[p];
646 if (!port->active)
647 continue;
648 while (urb->transfer_buffer_length + 3 < ep->max_transfer) {
649 uint8_t b;
650 if (snd_rawmidi_transmit(port->substream, &b, 1) != 1) {
651 port->active = 0;
652 break;
653 }
654 snd_usbmidi_transmit_byte(port, b, urb);
655 }
656 }
657}
658
659static const struct usb_protocol_ops snd_usbmidi_standard_ops = {
660 .input = snd_usbmidi_standard_input,
661 .output = snd_usbmidi_standard_output,
662 .output_packet = snd_usbmidi_output_standard_packet,
663};
664
665static const struct usb_protocol_ops snd_usbmidi_midiman_ops = {
666 .input = snd_usbmidi_midiman_input,
667 .output = snd_usbmidi_standard_output,
668 .output_packet = snd_usbmidi_output_midiman_packet,
669};
670
671static const
672struct usb_protocol_ops snd_usbmidi_maudio_broken_running_status_ops = {
673 .input = snd_usbmidi_maudio_broken_running_status_input,
674 .output = snd_usbmidi_standard_output,
675 .output_packet = snd_usbmidi_output_standard_packet,
676};
677
678static const struct usb_protocol_ops snd_usbmidi_cme_ops = {
679 .input = snd_usbmidi_cme_input,
680 .output = snd_usbmidi_standard_output,
681 .output_packet = snd_usbmidi_output_standard_packet,
682};
683
684static const struct usb_protocol_ops snd_usbmidi_ch345_broken_sysex_ops = {
685 .input = ch345_broken_sysex_input,
686 .output = snd_usbmidi_standard_output,
687 .output_packet = snd_usbmidi_output_standard_packet,
688};
689
690/*
691 * AKAI MPD16 protocol:
692 *
693 * For control port (endpoint 1):
694 * ==============================
695 * One or more chunks consisting of first byte of (0x10 | msg_len) and then a
696 * SysEx message (msg_len=9 bytes long).
697 *
698 * For data port (endpoint 2):
699 * ===========================
700 * One or more chunks consisting of first byte of (0x20 | msg_len) and then a
701 * MIDI message (msg_len bytes long)
702 *
703 * Messages sent: Active Sense, Note On, Poly Pressure, Control Change.
704 */
705static void snd_usbmidi_akai_input(struct snd_usb_midi_in_endpoint *ep,
706 uint8_t *buffer, int buffer_length)
707{
708 unsigned int pos = 0;
709 unsigned int len = (unsigned int)buffer_length;
710 while (pos < len) {
711 unsigned int port = (buffer[pos] >> 4) - 1;
712 unsigned int msg_len = buffer[pos] & 0x0f;
713 pos++;
714 if (pos + msg_len <= len && port < 2)
715 snd_usbmidi_input_data(ep, 0, &buffer[pos], msg_len);
716 pos += msg_len;
717 }
718}
719
720#define MAX_AKAI_SYSEX_LEN 9
721
722static void snd_usbmidi_akai_output(struct snd_usb_midi_out_endpoint *ep,
723 struct urb *urb)
724{
725 uint8_t *msg;
726 int pos, end, count, buf_end;
727 uint8_t tmp[MAX_AKAI_SYSEX_LEN];
728 struct snd_rawmidi_substream *substream = ep->ports[0].substream;
729
730 if (!ep->ports[0].active)
731 return;
732
733 msg = urb->transfer_buffer + urb->transfer_buffer_length;
734 buf_end = ep->max_transfer - MAX_AKAI_SYSEX_LEN - 1;
735
736 /* only try adding more data when there's space for at least 1 SysEx */
737 while (urb->transfer_buffer_length < buf_end) {
738 count = snd_rawmidi_transmit_peek(substream,
739 tmp, MAX_AKAI_SYSEX_LEN);
740 if (!count) {
741 ep->ports[0].active = 0;
742 return;
743 }
744 /* try to skip non-SysEx data */
745 for (pos = 0; pos < count && tmp[pos] != 0xF0; pos++)
746 ;
747
748 if (pos > 0) {
749 snd_rawmidi_transmit_ack(substream, pos);
750 continue;
751 }
752
753 /* look for the start or end marker */
754 for (end = 1; end < count && tmp[end] < 0xF0; end++)
755 ;
756
757 /* next SysEx started before the end of current one */
758 if (end < count && tmp[end] == 0xF0) {
759 /* it's incomplete - drop it */
760 snd_rawmidi_transmit_ack(substream, end);
761 continue;
762 }
763 /* SysEx complete */
764 if (end < count && tmp[end] == 0xF7) {
765 /* queue it, ack it, and get the next one */
766 count = end + 1;
767 msg[0] = 0x10 | count;
768 memcpy(&msg[1], tmp, count);
769 snd_rawmidi_transmit_ack(substream, count);
770 urb->transfer_buffer_length += count + 1;
771 msg += count + 1;
772 continue;
773 }
774 /* less than 9 bytes and no end byte - wait for more */
775 if (count < MAX_AKAI_SYSEX_LEN) {
776 ep->ports[0].active = 0;
777 return;
778 }
779 /* 9 bytes and no end marker in sight - malformed, skip it */
780 snd_rawmidi_transmit_ack(substream, count);
781 }
782}
783
784static const struct usb_protocol_ops snd_usbmidi_akai_ops = {
785 .input = snd_usbmidi_akai_input,
786 .output = snd_usbmidi_akai_output,
787};
788
789/*
790 * Novation USB MIDI protocol: number of data bytes is in the first byte
791 * (when receiving) (+1!) or in the second byte (when sending); data begins
792 * at the third byte.
793 */
794
795static void snd_usbmidi_novation_input(struct snd_usb_midi_in_endpoint *ep,
796 uint8_t *buffer, int buffer_length)
797{
798 if (buffer_length < 2 || !buffer[0] || buffer_length < buffer[0] + 1)
799 return;
800 snd_usbmidi_input_data(ep, 0, &buffer[2], buffer[0] - 1);
801}
802
803static void snd_usbmidi_novation_output(struct snd_usb_midi_out_endpoint *ep,
804 struct urb *urb)
805{
806 uint8_t *transfer_buffer;
807 int count;
808
809 if (!ep->ports[0].active)
810 return;
811 transfer_buffer = urb->transfer_buffer;
812 count = snd_rawmidi_transmit(ep->ports[0].substream,
813 &transfer_buffer[2],
814 ep->max_transfer - 2);
815 if (count < 1) {
816 ep->ports[0].active = 0;
817 return;
818 }
819 transfer_buffer[0] = 0;
820 transfer_buffer[1] = count;
821 urb->transfer_buffer_length = 2 + count;
822}
823
824static const struct usb_protocol_ops snd_usbmidi_novation_ops = {
825 .input = snd_usbmidi_novation_input,
826 .output = snd_usbmidi_novation_output,
827};
828
829/*
830 * "raw" protocol: just move raw MIDI bytes from/to the endpoint
831 */
832
833static void snd_usbmidi_raw_input(struct snd_usb_midi_in_endpoint *ep,
834 uint8_t *buffer, int buffer_length)
835{
836 snd_usbmidi_input_data(ep, 0, buffer, buffer_length);
837}
838
839static void snd_usbmidi_raw_output(struct snd_usb_midi_out_endpoint *ep,
840 struct urb *urb)
841{
842 int count;
843
844 if (!ep->ports[0].active)
845 return;
846 count = snd_rawmidi_transmit(ep->ports[0].substream,
847 urb->transfer_buffer,
848 ep->max_transfer);
849 if (count < 1) {
850 ep->ports[0].active = 0;
851 return;
852 }
853 urb->transfer_buffer_length = count;
854}
855
856static const struct usb_protocol_ops snd_usbmidi_raw_ops = {
857 .input = snd_usbmidi_raw_input,
858 .output = snd_usbmidi_raw_output,
859};
860
861/*
862 * FTDI protocol: raw MIDI bytes, but input packets have two modem status bytes.
863 */
864
865static void snd_usbmidi_ftdi_input(struct snd_usb_midi_in_endpoint *ep,
866 uint8_t *buffer, int buffer_length)
867{
868 if (buffer_length > 2)
869 snd_usbmidi_input_data(ep, 0, buffer + 2, buffer_length - 2);
870}
871
872static const struct usb_protocol_ops snd_usbmidi_ftdi_ops = {
873 .input = snd_usbmidi_ftdi_input,
874 .output = snd_usbmidi_raw_output,
875};
876
877static void snd_usbmidi_us122l_input(struct snd_usb_midi_in_endpoint *ep,
878 uint8_t *buffer, int buffer_length)
879{
880 if (buffer_length != 9)
881 return;
882 buffer_length = 8;
883 while (buffer_length && buffer[buffer_length - 1] == 0xFD)
884 buffer_length--;
885 if (buffer_length)
886 snd_usbmidi_input_data(ep, 0, buffer, buffer_length);
887}
888
889static void snd_usbmidi_us122l_output(struct snd_usb_midi_out_endpoint *ep,
890 struct urb *urb)
891{
892 int count;
893
894 if (!ep->ports[0].active)
895 return;
896 switch (snd_usb_get_speed(ep->umidi->dev)) {
897 case USB_SPEED_HIGH:
898 case USB_SPEED_SUPER:
899 case USB_SPEED_SUPER_PLUS:
900 count = 1;
901 break;
902 default:
903 count = 2;
904 }
905 count = snd_rawmidi_transmit(ep->ports[0].substream,
906 urb->transfer_buffer,
907 count);
908 if (count < 1) {
909 ep->ports[0].active = 0;
910 return;
911 }
912
913 memset(urb->transfer_buffer + count, 0xFD, ep->max_transfer - count);
914 urb->transfer_buffer_length = ep->max_transfer;
915}
916
917static const struct usb_protocol_ops snd_usbmidi_122l_ops = {
918 .input = snd_usbmidi_us122l_input,
919 .output = snd_usbmidi_us122l_output,
920};
921
922/*
923 * Emagic USB MIDI protocol: raw MIDI with "F5 xx" port switching.
924 */
925
926static void snd_usbmidi_emagic_init_out(struct snd_usb_midi_out_endpoint *ep)
927{
928 static const u8 init_data[] = {
929 /* initialization magic: "get version" */
930 0xf0,
931 0x00, 0x20, 0x31, /* Emagic */
932 0x64, /* Unitor8 */
933 0x0b, /* version number request */
934 0x00, /* command version */
935 0x00, /* EEPROM, box 0 */
936 0xf7
937 };
938 send_bulk_static_data(ep, init_data, sizeof(init_data));
939 /* while we're at it, pour on more magic */
940 send_bulk_static_data(ep, init_data, sizeof(init_data));
941}
942
943static void snd_usbmidi_emagic_finish_out(struct snd_usb_midi_out_endpoint *ep)
944{
945 static const u8 finish_data[] = {
946 /* switch to patch mode with last preset */
947 0xf0,
948 0x00, 0x20, 0x31, /* Emagic */
949 0x64, /* Unitor8 */
950 0x10, /* patch switch command */
951 0x00, /* command version */
952 0x7f, /* to all boxes */
953 0x40, /* last preset in EEPROM */
954 0xf7
955 };
956 send_bulk_static_data(ep, finish_data, sizeof(finish_data));
957}
958
959static void snd_usbmidi_emagic_input(struct snd_usb_midi_in_endpoint *ep,
960 uint8_t *buffer, int buffer_length)
961{
962 int i;
963
964 /* FF indicates end of valid data */
965 for (i = 0; i < buffer_length; ++i)
966 if (buffer[i] == 0xff) {
967 buffer_length = i;
968 break;
969 }
970
971 /* handle F5 at end of last buffer */
972 if (ep->seen_f5)
973 goto switch_port;
974
975 while (buffer_length > 0) {
976 /* determine size of data until next F5 */
977 for (i = 0; i < buffer_length; ++i)
978 if (buffer[i] == 0xf5)
979 break;
980 snd_usbmidi_input_data(ep, ep->current_port, buffer, i);
981 buffer += i;
982 buffer_length -= i;
983
984 if (buffer_length <= 0)
985 break;
986 /* assert(buffer[0] == 0xf5); */
987 ep->seen_f5 = 1;
988 ++buffer;
989 --buffer_length;
990
991 switch_port:
992 if (buffer_length <= 0)
993 break;
994 if (buffer[0] < 0x80) {
995 ep->current_port = (buffer[0] - 1) & 15;
996 ++buffer;
997 --buffer_length;
998 }
999 ep->seen_f5 = 0;
1000 }
1001}
1002
1003static void snd_usbmidi_emagic_output(struct snd_usb_midi_out_endpoint *ep,
1004 struct urb *urb)
1005{
1006 int port0 = ep->current_port;
1007 uint8_t *buf = urb->transfer_buffer;
1008 int buf_free = ep->max_transfer;
1009 int length, i;
1010
1011 for (i = 0; i < 0x10; ++i) {
1012 /* round-robin, starting at the last current port */
1013 int portnum = (port0 + i) & 15;
1014 struct usbmidi_out_port *port = &ep->ports[portnum];
1015
1016 if (!port->active)
1017 continue;
1018 if (snd_rawmidi_transmit_peek(port->substream, buf, 1) != 1) {
1019 port->active = 0;
1020 continue;
1021 }
1022
1023 if (portnum != ep->current_port) {
1024 if (buf_free < 2)
1025 break;
1026 ep->current_port = portnum;
1027 buf[0] = 0xf5;
1028 buf[1] = (portnum + 1) & 15;
1029 buf += 2;
1030 buf_free -= 2;
1031 }
1032
1033 if (buf_free < 1)
1034 break;
1035 length = snd_rawmidi_transmit(port->substream, buf, buf_free);
1036 if (length > 0) {
1037 buf += length;
1038 buf_free -= length;
1039 if (buf_free < 1)
1040 break;
1041 }
1042 }
1043 if (buf_free < ep->max_transfer && buf_free > 0) {
1044 *buf = 0xff;
1045 --buf_free;
1046 }
1047 urb->transfer_buffer_length = ep->max_transfer - buf_free;
1048}
1049
1050static const struct usb_protocol_ops snd_usbmidi_emagic_ops = {
1051 .input = snd_usbmidi_emagic_input,
1052 .output = snd_usbmidi_emagic_output,
1053 .init_out_endpoint = snd_usbmidi_emagic_init_out,
1054 .finish_out_endpoint = snd_usbmidi_emagic_finish_out,
1055};
1056
1057
1058static void update_roland_altsetting(struct snd_usb_midi *umidi)
1059{
1060 struct usb_interface *intf;
1061 struct usb_host_interface *hostif;
1062 struct usb_interface_descriptor *intfd;
1063 int is_light_load;
1064
1065 intf = umidi->iface;
1066 is_light_load = intf->cur_altsetting != intf->altsetting;
1067 if (umidi->roland_load_ctl->private_value == is_light_load)
1068 return;
1069 hostif = &intf->altsetting[umidi->roland_load_ctl->private_value];
1070 intfd = get_iface_desc(hostif);
1071 snd_usbmidi_input_stop(&umidi->list);
1072 usb_set_interface(umidi->dev, intfd->bInterfaceNumber,
1073 intfd->bAlternateSetting);
1074 snd_usbmidi_input_start(&umidi->list);
1075}
1076
1077static int substream_open(struct snd_rawmidi_substream *substream, int dir,
1078 int open)
1079{
1080 struct snd_usb_midi *umidi = substream->rmidi->private_data;
1081 struct snd_kcontrol *ctl;
1082
1083 down_read(&umidi->disc_rwsem);
1084 if (umidi->disconnected) {
1085 up_read(&umidi->disc_rwsem);
1086 return open ? -ENODEV : 0;
1087 }
1088
1089 mutex_lock(&umidi->mutex);
1090 if (open) {
1091 if (!umidi->opened[0] && !umidi->opened[1]) {
1092 if (umidi->roland_load_ctl) {
1093 ctl = umidi->roland_load_ctl;
1094 ctl->vd[0].access |=
1095 SNDRV_CTL_ELEM_ACCESS_INACTIVE;
1096 snd_ctl_notify(umidi->card,
1097 SNDRV_CTL_EVENT_MASK_INFO, &ctl->id);
1098 update_roland_altsetting(umidi);
1099 }
1100 }
1101 umidi->opened[dir]++;
1102 if (umidi->opened[1])
1103 snd_usbmidi_input_start(&umidi->list);
1104 } else {
1105 umidi->opened[dir]--;
1106 if (!umidi->opened[1])
1107 snd_usbmidi_input_stop(&umidi->list);
1108 if (!umidi->opened[0] && !umidi->opened[1]) {
1109 if (umidi->roland_load_ctl) {
1110 ctl = umidi->roland_load_ctl;
1111 ctl->vd[0].access &=
1112 ~SNDRV_CTL_ELEM_ACCESS_INACTIVE;
1113 snd_ctl_notify(umidi->card,
1114 SNDRV_CTL_EVENT_MASK_INFO, &ctl->id);
1115 }
1116 }
1117 }
1118 mutex_unlock(&umidi->mutex);
1119 up_read(&umidi->disc_rwsem);
1120 return 0;
1121}
1122
1123static int snd_usbmidi_output_open(struct snd_rawmidi_substream *substream)
1124{
1125 struct snd_usb_midi *umidi = substream->rmidi->private_data;
1126 struct usbmidi_out_port *port = NULL;
1127 int i, j;
1128
1129 for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i)
1130 if (umidi->endpoints[i].out)
1131 for (j = 0; j < 0x10; ++j)
1132 if (umidi->endpoints[i].out->ports[j].substream == substream) {
1133 port = &umidi->endpoints[i].out->ports[j];
1134 break;
1135 }
1136 if (!port) {
1137 snd_BUG();
1138 return -ENXIO;
1139 }
1140
1141 substream->runtime->private_data = port;
1142 port->state = STATE_UNKNOWN;
1143 return substream_open(substream, 0, 1);
1144}
1145
1146static int snd_usbmidi_output_close(struct snd_rawmidi_substream *substream)
1147{
1148 return substream_open(substream, 0, 0);
1149}
1150
1151static void snd_usbmidi_output_trigger(struct snd_rawmidi_substream *substream,
1152 int up)
1153{
1154 struct usbmidi_out_port *port =
1155 (struct usbmidi_out_port *)substream->runtime->private_data;
1156
1157 port->active = up;
1158 if (up) {
1159 if (port->ep->umidi->disconnected) {
1160 /* gobble up remaining bytes to prevent wait in
1161 * snd_rawmidi_drain_output */
1162 snd_rawmidi_proceed(substream);
1163 return;
1164 }
1165 queue_work(system_highpri_wq, &port->ep->work);
1166 }
1167}
1168
1169static void snd_usbmidi_output_drain(struct snd_rawmidi_substream *substream)
1170{
1171 struct usbmidi_out_port *port = substream->runtime->private_data;
1172 struct snd_usb_midi_out_endpoint *ep = port->ep;
1173 unsigned int drain_urbs;
1174 DEFINE_WAIT(wait);
1175 long timeout = msecs_to_jiffies(50);
1176
1177 if (ep->umidi->disconnected)
1178 return;
1179 /*
1180 * The substream buffer is empty, but some data might still be in the
1181 * currently active URBs, so we have to wait for those to complete.
1182 */
1183 spin_lock_irq(&ep->buffer_lock);
1184 drain_urbs = ep->active_urbs;
1185 if (drain_urbs) {
1186 ep->drain_urbs |= drain_urbs;
1187 do {
1188 prepare_to_wait(&ep->drain_wait, &wait,
1189 TASK_UNINTERRUPTIBLE);
1190 spin_unlock_irq(&ep->buffer_lock);
1191 timeout = schedule_timeout(timeout);
1192 spin_lock_irq(&ep->buffer_lock);
1193 drain_urbs &= ep->drain_urbs;
1194 } while (drain_urbs && timeout);
1195 finish_wait(&ep->drain_wait, &wait);
1196 }
1197 spin_unlock_irq(&ep->buffer_lock);
1198}
1199
1200static int snd_usbmidi_input_open(struct snd_rawmidi_substream *substream)
1201{
1202 return substream_open(substream, 1, 1);
1203}
1204
1205static int snd_usbmidi_input_close(struct snd_rawmidi_substream *substream)
1206{
1207 return substream_open(substream, 1, 0);
1208}
1209
1210static void snd_usbmidi_input_trigger(struct snd_rawmidi_substream *substream,
1211 int up)
1212{
1213 struct snd_usb_midi *umidi = substream->rmidi->private_data;
1214
1215 if (up)
1216 set_bit(substream->number, &umidi->input_triggered);
1217 else
1218 clear_bit(substream->number, &umidi->input_triggered);
1219}
1220
1221static const struct snd_rawmidi_ops snd_usbmidi_output_ops = {
1222 .open = snd_usbmidi_output_open,
1223 .close = snd_usbmidi_output_close,
1224 .trigger = snd_usbmidi_output_trigger,
1225 .drain = snd_usbmidi_output_drain,
1226};
1227
1228static const struct snd_rawmidi_ops snd_usbmidi_input_ops = {
1229 .open = snd_usbmidi_input_open,
1230 .close = snd_usbmidi_input_close,
1231 .trigger = snd_usbmidi_input_trigger
1232};
1233
1234static void free_urb_and_buffer(struct snd_usb_midi *umidi, struct urb *urb,
1235 unsigned int buffer_length)
1236{
1237 usb_free_coherent(umidi->dev, buffer_length,
1238 urb->transfer_buffer, urb->transfer_dma);
1239 usb_free_urb(urb);
1240}
1241
1242/*
1243 * Frees an input endpoint.
1244 * May be called when ep hasn't been initialized completely.
1245 */
1246static void snd_usbmidi_in_endpoint_delete(struct snd_usb_midi_in_endpoint *ep)
1247{
1248 unsigned int i;
1249
1250 for (i = 0; i < INPUT_URBS; ++i)
1251 if (ep->urbs[i])
1252 free_urb_and_buffer(ep->umidi, ep->urbs[i],
1253 ep->urbs[i]->transfer_buffer_length);
1254 kfree(ep);
1255}
1256
1257/*
1258 * Creates an input endpoint.
1259 */
1260static int snd_usbmidi_in_endpoint_create(struct snd_usb_midi *umidi,
1261 struct snd_usb_midi_endpoint_info *ep_info,
1262 struct snd_usb_midi_endpoint *rep)
1263{
1264 struct snd_usb_midi_in_endpoint *ep;
1265 void *buffer;
1266 unsigned int pipe;
1267 int length;
1268 unsigned int i;
1269 int err;
1270
1271 rep->in = NULL;
1272 ep = kzalloc(sizeof(*ep), GFP_KERNEL);
1273 if (!ep)
1274 return -ENOMEM;
1275 ep->umidi = umidi;
1276
1277 for (i = 0; i < INPUT_URBS; ++i) {
1278 ep->urbs[i] = usb_alloc_urb(0, GFP_KERNEL);
1279 if (!ep->urbs[i]) {
1280 err = -ENOMEM;
1281 goto error;
1282 }
1283 }
1284 if (ep_info->in_interval)
1285 pipe = usb_rcvintpipe(umidi->dev, ep_info->in_ep);
1286 else
1287 pipe = usb_rcvbulkpipe(umidi->dev, ep_info->in_ep);
1288 length = usb_maxpacket(umidi->dev, pipe, 0);
1289 for (i = 0; i < INPUT_URBS; ++i) {
1290 buffer = usb_alloc_coherent(umidi->dev, length, GFP_KERNEL,
1291 &ep->urbs[i]->transfer_dma);
1292 if (!buffer) {
1293 err = -ENOMEM;
1294 goto error;
1295 }
1296 if (ep_info->in_interval)
1297 usb_fill_int_urb(ep->urbs[i], umidi->dev,
1298 pipe, buffer, length,
1299 snd_usbmidi_in_urb_complete,
1300 ep, ep_info->in_interval);
1301 else
1302 usb_fill_bulk_urb(ep->urbs[i], umidi->dev,
1303 pipe, buffer, length,
1304 snd_usbmidi_in_urb_complete, ep);
1305 ep->urbs[i]->transfer_flags = URB_NO_TRANSFER_DMA_MAP;
1306 err = usb_urb_ep_type_check(ep->urbs[i]);
1307 if (err < 0) {
1308 dev_err(&umidi->dev->dev, "invalid MIDI in EP %x\n",
1309 ep_info->in_ep);
1310 goto error;
1311 }
1312 }
1313
1314 rep->in = ep;
1315 return 0;
1316
1317 error:
1318 snd_usbmidi_in_endpoint_delete(ep);
1319 return err;
1320}
1321
1322/*
1323 * Frees an output endpoint.
1324 * May be called when ep hasn't been initialized completely.
1325 */
1326static void snd_usbmidi_out_endpoint_clear(struct snd_usb_midi_out_endpoint *ep)
1327{
1328 unsigned int i;
1329
1330 for (i = 0; i < OUTPUT_URBS; ++i)
1331 if (ep->urbs[i].urb) {
1332 free_urb_and_buffer(ep->umidi, ep->urbs[i].urb,
1333 ep->max_transfer);
1334 ep->urbs[i].urb = NULL;
1335 }
1336}
1337
1338static void snd_usbmidi_out_endpoint_delete(struct snd_usb_midi_out_endpoint *ep)
1339{
1340 snd_usbmidi_out_endpoint_clear(ep);
1341 kfree(ep);
1342}
1343
1344/*
1345 * Creates an output endpoint, and initializes output ports.
1346 */
1347static int snd_usbmidi_out_endpoint_create(struct snd_usb_midi *umidi,
1348 struct snd_usb_midi_endpoint_info *ep_info,
1349 struct snd_usb_midi_endpoint *rep)
1350{
1351 struct snd_usb_midi_out_endpoint *ep;
1352 unsigned int i;
1353 unsigned int pipe;
1354 void *buffer;
1355 int err;
1356
1357 rep->out = NULL;
1358 ep = kzalloc(sizeof(*ep), GFP_KERNEL);
1359 if (!ep)
1360 return -ENOMEM;
1361 ep->umidi = umidi;
1362
1363 for (i = 0; i < OUTPUT_URBS; ++i) {
1364 ep->urbs[i].urb = usb_alloc_urb(0, GFP_KERNEL);
1365 if (!ep->urbs[i].urb) {
1366 err = -ENOMEM;
1367 goto error;
1368 }
1369 ep->urbs[i].ep = ep;
1370 }
1371 if (ep_info->out_interval)
1372 pipe = usb_sndintpipe(umidi->dev, ep_info->out_ep);
1373 else
1374 pipe = usb_sndbulkpipe(umidi->dev, ep_info->out_ep);
1375 switch (umidi->usb_id) {
1376 default:
1377 ep->max_transfer = usb_maxpacket(umidi->dev, pipe, 1);
1378 break;
1379 /*
1380 * Various chips declare a packet size larger than 4 bytes, but
1381 * do not actually work with larger packets:
1382 */
1383 case USB_ID(0x0a67, 0x5011): /* Medeli DD305 */
1384 case USB_ID(0x0a92, 0x1020): /* ESI M4U */
1385 case USB_ID(0x1430, 0x474b): /* RedOctane GH MIDI INTERFACE */
1386 case USB_ID(0x15ca, 0x0101): /* Textech USB Midi Cable */
1387 case USB_ID(0x15ca, 0x1806): /* Textech USB Midi Cable */
1388 case USB_ID(0x1a86, 0x752d): /* QinHeng CH345 "USB2.0-MIDI" */
1389 case USB_ID(0xfc08, 0x0101): /* Unknown vendor Cable */
1390 ep->max_transfer = 4;
1391 break;
1392 /*
1393 * Some devices only work with 9 bytes packet size:
1394 */
1395 case USB_ID(0x0644, 0x800e): /* Tascam US-122L */
1396 case USB_ID(0x0644, 0x800f): /* Tascam US-144 */
1397 ep->max_transfer = 9;
1398 break;
1399 }
1400 for (i = 0; i < OUTPUT_URBS; ++i) {
1401 buffer = usb_alloc_coherent(umidi->dev,
1402 ep->max_transfer, GFP_KERNEL,
1403 &ep->urbs[i].urb->transfer_dma);
1404 if (!buffer) {
1405 err = -ENOMEM;
1406 goto error;
1407 }
1408 if (ep_info->out_interval)
1409 usb_fill_int_urb(ep->urbs[i].urb, umidi->dev,
1410 pipe, buffer, ep->max_transfer,
1411 snd_usbmidi_out_urb_complete,
1412 &ep->urbs[i], ep_info->out_interval);
1413 else
1414 usb_fill_bulk_urb(ep->urbs[i].urb, umidi->dev,
1415 pipe, buffer, ep->max_transfer,
1416 snd_usbmidi_out_urb_complete,
1417 &ep->urbs[i]);
1418 err = usb_urb_ep_type_check(ep->urbs[i].urb);
1419 if (err < 0) {
1420 dev_err(&umidi->dev->dev, "invalid MIDI out EP %x\n",
1421 ep_info->out_ep);
1422 goto error;
1423 }
1424 ep->urbs[i].urb->transfer_flags = URB_NO_TRANSFER_DMA_MAP;
1425 }
1426
1427 spin_lock_init(&ep->buffer_lock);
1428 INIT_WORK(&ep->work, snd_usbmidi_out_work);
1429 init_waitqueue_head(&ep->drain_wait);
1430
1431 for (i = 0; i < 0x10; ++i)
1432 if (ep_info->out_cables & (1 << i)) {
1433 ep->ports[i].ep = ep;
1434 ep->ports[i].cable = i << 4;
1435 }
1436
1437 if (umidi->usb_protocol_ops->init_out_endpoint)
1438 umidi->usb_protocol_ops->init_out_endpoint(ep);
1439
1440 rep->out = ep;
1441 return 0;
1442
1443 error:
1444 snd_usbmidi_out_endpoint_delete(ep);
1445 return err;
1446}
1447
1448/*
1449 * Frees everything.
1450 */
1451static void snd_usbmidi_free(struct snd_usb_midi *umidi)
1452{
1453 int i;
1454
1455 for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i) {
1456 struct snd_usb_midi_endpoint *ep = &umidi->endpoints[i];
1457 if (ep->out)
1458 snd_usbmidi_out_endpoint_delete(ep->out);
1459 if (ep->in)
1460 snd_usbmidi_in_endpoint_delete(ep->in);
1461 }
1462 mutex_destroy(&umidi->mutex);
1463 kfree(umidi);
1464}
1465
1466/*
1467 * Unlinks all URBs (must be done before the usb_device is deleted).
1468 */
1469void snd_usbmidi_disconnect(struct list_head *p)
1470{
1471 struct snd_usb_midi *umidi;
1472 unsigned int i, j;
1473
1474 umidi = list_entry(p, struct snd_usb_midi, list);
1475 /*
1476 * an URB's completion handler may start the timer and
1477 * a timer may submit an URB. To reliably break the cycle
1478 * a flag under lock must be used
1479 */
1480 down_write(&umidi->disc_rwsem);
1481 spin_lock_irq(&umidi->disc_lock);
1482 umidi->disconnected = 1;
1483 spin_unlock_irq(&umidi->disc_lock);
1484 up_write(&umidi->disc_rwsem);
1485
1486 del_timer_sync(&umidi->error_timer);
1487
1488 for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i) {
1489 struct snd_usb_midi_endpoint *ep = &umidi->endpoints[i];
1490 if (ep->out)
1491 cancel_work_sync(&ep->out->work);
1492 if (ep->out) {
1493 for (j = 0; j < OUTPUT_URBS; ++j)
1494 usb_kill_urb(ep->out->urbs[j].urb);
1495 if (umidi->usb_protocol_ops->finish_out_endpoint)
1496 umidi->usb_protocol_ops->finish_out_endpoint(ep->out);
1497 ep->out->active_urbs = 0;
1498 if (ep->out->drain_urbs) {
1499 ep->out->drain_urbs = 0;
1500 wake_up(&ep->out->drain_wait);
1501 }
1502 }
1503 if (ep->in)
1504 for (j = 0; j < INPUT_URBS; ++j)
1505 usb_kill_urb(ep->in->urbs[j]);
1506 /* free endpoints here; later call can result in Oops */
1507 if (ep->out)
1508 snd_usbmidi_out_endpoint_clear(ep->out);
1509 if (ep->in) {
1510 snd_usbmidi_in_endpoint_delete(ep->in);
1511 ep->in = NULL;
1512 }
1513 }
1514}
1515EXPORT_SYMBOL(snd_usbmidi_disconnect);
1516
1517static void snd_usbmidi_rawmidi_free(struct snd_rawmidi *rmidi)
1518{
1519 struct snd_usb_midi *umidi = rmidi->private_data;
1520 snd_usbmidi_free(umidi);
1521}
1522
1523static struct snd_rawmidi_substream *snd_usbmidi_find_substream(struct snd_usb_midi *umidi,
1524 int stream,
1525 int number)
1526{
1527 struct snd_rawmidi_substream *substream;
1528
1529 list_for_each_entry(substream, &umidi->rmidi->streams[stream].substreams,
1530 list) {
1531 if (substream->number == number)
1532 return substream;
1533 }
1534 return NULL;
1535}
1536
1537/*
1538 * This list specifies names for ports that do not fit into the standard
1539 * "(product) MIDI (n)" schema because they aren't external MIDI ports,
1540 * such as internal control or synthesizer ports.
1541 */
1542static struct port_info {
1543 u32 id;
1544 short int port;
1545 short int voices;
1546 const char *name;
1547 unsigned int seq_flags;
1548} snd_usbmidi_port_info[] = {
1549#define PORT_INFO(vendor, product, num, name_, voices_, flags) \
1550 { .id = USB_ID(vendor, product), \
1551 .port = num, .voices = voices_, \
1552 .name = name_, .seq_flags = flags }
1553#define EXTERNAL_PORT(vendor, product, num, name) \
1554 PORT_INFO(vendor, product, num, name, 0, \
1555 SNDRV_SEQ_PORT_TYPE_MIDI_GENERIC | \
1556 SNDRV_SEQ_PORT_TYPE_HARDWARE | \
1557 SNDRV_SEQ_PORT_TYPE_PORT)
1558#define CONTROL_PORT(vendor, product, num, name) \
1559 PORT_INFO(vendor, product, num, name, 0, \
1560 SNDRV_SEQ_PORT_TYPE_MIDI_GENERIC | \
1561 SNDRV_SEQ_PORT_TYPE_HARDWARE)
1562#define GM_SYNTH_PORT(vendor, product, num, name, voices) \
1563 PORT_INFO(vendor, product, num, name, voices, \
1564 SNDRV_SEQ_PORT_TYPE_MIDI_GENERIC | \
1565 SNDRV_SEQ_PORT_TYPE_MIDI_GM | \
1566 SNDRV_SEQ_PORT_TYPE_HARDWARE | \
1567 SNDRV_SEQ_PORT_TYPE_SYNTHESIZER)
1568#define ROLAND_SYNTH_PORT(vendor, product, num, name, voices) \
1569 PORT_INFO(vendor, product, num, name, voices, \
1570 SNDRV_SEQ_PORT_TYPE_MIDI_GENERIC | \
1571 SNDRV_SEQ_PORT_TYPE_MIDI_GM | \
1572 SNDRV_SEQ_PORT_TYPE_MIDI_GM2 | \
1573 SNDRV_SEQ_PORT_TYPE_MIDI_GS | \
1574 SNDRV_SEQ_PORT_TYPE_MIDI_XG | \
1575 SNDRV_SEQ_PORT_TYPE_HARDWARE | \
1576 SNDRV_SEQ_PORT_TYPE_SYNTHESIZER)
1577#define SOUNDCANVAS_PORT(vendor, product, num, name, voices) \
1578 PORT_INFO(vendor, product, num, name, voices, \
1579 SNDRV_SEQ_PORT_TYPE_MIDI_GENERIC | \
1580 SNDRV_SEQ_PORT_TYPE_MIDI_GM | \
1581 SNDRV_SEQ_PORT_TYPE_MIDI_GM2 | \
1582 SNDRV_SEQ_PORT_TYPE_MIDI_GS | \
1583 SNDRV_SEQ_PORT_TYPE_MIDI_XG | \
1584 SNDRV_SEQ_PORT_TYPE_MIDI_MT32 | \
1585 SNDRV_SEQ_PORT_TYPE_HARDWARE | \
1586 SNDRV_SEQ_PORT_TYPE_SYNTHESIZER)
1587 /* Yamaha MOTIF XF */
1588 GM_SYNTH_PORT(0x0499, 0x105c, 0, "%s Tone Generator", 128),
1589 CONTROL_PORT(0x0499, 0x105c, 1, "%s Remote Control"),
1590 EXTERNAL_PORT(0x0499, 0x105c, 2, "%s Thru"),
1591 CONTROL_PORT(0x0499, 0x105c, 3, "%s Editor"),
1592 /* Roland UA-100 */
1593 CONTROL_PORT(0x0582, 0x0000, 2, "%s Control"),
1594 /* Roland SC-8850 */
1595 SOUNDCANVAS_PORT(0x0582, 0x0003, 0, "%s Part A", 128),
1596 SOUNDCANVAS_PORT(0x0582, 0x0003, 1, "%s Part B", 128),
1597 SOUNDCANVAS_PORT(0x0582, 0x0003, 2, "%s Part C", 128),
1598 SOUNDCANVAS_PORT(0x0582, 0x0003, 3, "%s Part D", 128),
1599 EXTERNAL_PORT(0x0582, 0x0003, 4, "%s MIDI 1"),
1600 EXTERNAL_PORT(0x0582, 0x0003, 5, "%s MIDI 2"),
1601 /* Roland U-8 */
1602 EXTERNAL_PORT(0x0582, 0x0004, 0, "%s MIDI"),
1603 CONTROL_PORT(0x0582, 0x0004, 1, "%s Control"),
1604 /* Roland SC-8820 */
1605 SOUNDCANVAS_PORT(0x0582, 0x0007, 0, "%s Part A", 64),
1606 SOUNDCANVAS_PORT(0x0582, 0x0007, 1, "%s Part B", 64),
1607 EXTERNAL_PORT(0x0582, 0x0007, 2, "%s MIDI"),
1608 /* Roland SK-500 */
1609 SOUNDCANVAS_PORT(0x0582, 0x000b, 0, "%s Part A", 64),
1610 SOUNDCANVAS_PORT(0x0582, 0x000b, 1, "%s Part B", 64),
1611 EXTERNAL_PORT(0x0582, 0x000b, 2, "%s MIDI"),
1612 /* Roland SC-D70 */
1613 SOUNDCANVAS_PORT(0x0582, 0x000c, 0, "%s Part A", 64),
1614 SOUNDCANVAS_PORT(0x0582, 0x000c, 1, "%s Part B", 64),
1615 EXTERNAL_PORT(0x0582, 0x000c, 2, "%s MIDI"),
1616 /* Edirol UM-880 */
1617 CONTROL_PORT(0x0582, 0x0014, 8, "%s Control"),
1618 /* Edirol SD-90 */
1619 ROLAND_SYNTH_PORT(0x0582, 0x0016, 0, "%s Part A", 128),
1620 ROLAND_SYNTH_PORT(0x0582, 0x0016, 1, "%s Part B", 128),
1621 EXTERNAL_PORT(0x0582, 0x0016, 2, "%s MIDI 1"),
1622 EXTERNAL_PORT(0x0582, 0x0016, 3, "%s MIDI 2"),
1623 /* Edirol UM-550 */
1624 CONTROL_PORT(0x0582, 0x0023, 5, "%s Control"),
1625 /* Edirol SD-20 */
1626 ROLAND_SYNTH_PORT(0x0582, 0x0027, 0, "%s Part A", 64),
1627 ROLAND_SYNTH_PORT(0x0582, 0x0027, 1, "%s Part B", 64),
1628 EXTERNAL_PORT(0x0582, 0x0027, 2, "%s MIDI"),
1629 /* Edirol SD-80 */
1630 ROLAND_SYNTH_PORT(0x0582, 0x0029, 0, "%s Part A", 128),
1631 ROLAND_SYNTH_PORT(0x0582, 0x0029, 1, "%s Part B", 128),
1632 EXTERNAL_PORT(0x0582, 0x0029, 2, "%s MIDI 1"),
1633 EXTERNAL_PORT(0x0582, 0x0029, 3, "%s MIDI 2"),
1634 /* Edirol UA-700 */
1635 EXTERNAL_PORT(0x0582, 0x002b, 0, "%s MIDI"),
1636 CONTROL_PORT(0x0582, 0x002b, 1, "%s Control"),
1637 /* Roland VariOS */
1638 EXTERNAL_PORT(0x0582, 0x002f, 0, "%s MIDI"),
1639 EXTERNAL_PORT(0x0582, 0x002f, 1, "%s External MIDI"),
1640 EXTERNAL_PORT(0x0582, 0x002f, 2, "%s Sync"),
1641 /* Edirol PCR */
1642 EXTERNAL_PORT(0x0582, 0x0033, 0, "%s MIDI"),
1643 EXTERNAL_PORT(0x0582, 0x0033, 1, "%s 1"),
1644 EXTERNAL_PORT(0x0582, 0x0033, 2, "%s 2"),
1645 /* BOSS GS-10 */
1646 EXTERNAL_PORT(0x0582, 0x003b, 0, "%s MIDI"),
1647 CONTROL_PORT(0x0582, 0x003b, 1, "%s Control"),
1648 /* Edirol UA-1000 */
1649 EXTERNAL_PORT(0x0582, 0x0044, 0, "%s MIDI"),
1650 CONTROL_PORT(0x0582, 0x0044, 1, "%s Control"),
1651 /* Edirol UR-80 */
1652 EXTERNAL_PORT(0x0582, 0x0048, 0, "%s MIDI"),
1653 EXTERNAL_PORT(0x0582, 0x0048, 1, "%s 1"),
1654 EXTERNAL_PORT(0x0582, 0x0048, 2, "%s 2"),
1655 /* Edirol PCR-A */
1656 EXTERNAL_PORT(0x0582, 0x004d, 0, "%s MIDI"),
1657 EXTERNAL_PORT(0x0582, 0x004d, 1, "%s 1"),
1658 EXTERNAL_PORT(0x0582, 0x004d, 2, "%s 2"),
1659 /* BOSS GT-PRO */
1660 CONTROL_PORT(0x0582, 0x0089, 0, "%s Control"),
1661 /* Edirol UM-3EX */
1662 CONTROL_PORT(0x0582, 0x009a, 3, "%s Control"),
1663 /* Roland VG-99 */
1664 CONTROL_PORT(0x0582, 0x00b2, 0, "%s Control"),
1665 EXTERNAL_PORT(0x0582, 0x00b2, 1, "%s MIDI"),
1666 /* Cakewalk Sonar V-Studio 100 */
1667 EXTERNAL_PORT(0x0582, 0x00eb, 0, "%s MIDI"),
1668 CONTROL_PORT(0x0582, 0x00eb, 1, "%s Control"),
1669 /* Roland VB-99 */
1670 CONTROL_PORT(0x0582, 0x0102, 0, "%s Control"),
1671 EXTERNAL_PORT(0x0582, 0x0102, 1, "%s MIDI"),
1672 /* Roland A-PRO */
1673 EXTERNAL_PORT(0x0582, 0x010f, 0, "%s MIDI"),
1674 CONTROL_PORT(0x0582, 0x010f, 1, "%s 1"),
1675 CONTROL_PORT(0x0582, 0x010f, 2, "%s 2"),
1676 /* Roland SD-50 */
1677 ROLAND_SYNTH_PORT(0x0582, 0x0114, 0, "%s Synth", 128),
1678 EXTERNAL_PORT(0x0582, 0x0114, 1, "%s MIDI"),
1679 CONTROL_PORT(0x0582, 0x0114, 2, "%s Control"),
1680 /* Roland OCTA-CAPTURE */
1681 EXTERNAL_PORT(0x0582, 0x0120, 0, "%s MIDI"),
1682 CONTROL_PORT(0x0582, 0x0120, 1, "%s Control"),
1683 EXTERNAL_PORT(0x0582, 0x0121, 0, "%s MIDI"),
1684 CONTROL_PORT(0x0582, 0x0121, 1, "%s Control"),
1685 /* Roland SPD-SX */
1686 CONTROL_PORT(0x0582, 0x0145, 0, "%s Control"),
1687 EXTERNAL_PORT(0x0582, 0x0145, 1, "%s MIDI"),
1688 /* Roland A-Series */
1689 CONTROL_PORT(0x0582, 0x0156, 0, "%s Keyboard"),
1690 EXTERNAL_PORT(0x0582, 0x0156, 1, "%s MIDI"),
1691 /* Roland INTEGRA-7 */
1692 ROLAND_SYNTH_PORT(0x0582, 0x015b, 0, "%s Synth", 128),
1693 CONTROL_PORT(0x0582, 0x015b, 1, "%s Control"),
1694 /* M-Audio MidiSport 8x8 */
1695 CONTROL_PORT(0x0763, 0x1031, 8, "%s Control"),
1696 CONTROL_PORT(0x0763, 0x1033, 8, "%s Control"),
1697 /* MOTU Fastlane */
1698 EXTERNAL_PORT(0x07fd, 0x0001, 0, "%s MIDI A"),
1699 EXTERNAL_PORT(0x07fd, 0x0001, 1, "%s MIDI B"),
1700 /* Emagic Unitor8/AMT8/MT4 */
1701 EXTERNAL_PORT(0x086a, 0x0001, 8, "%s Broadcast"),
1702 EXTERNAL_PORT(0x086a, 0x0002, 8, "%s Broadcast"),
1703 EXTERNAL_PORT(0x086a, 0x0003, 4, "%s Broadcast"),
1704 /* Akai MPD16 */
1705 CONTROL_PORT(0x09e8, 0x0062, 0, "%s Control"),
1706 PORT_INFO(0x09e8, 0x0062, 1, "%s MIDI", 0,
1707 SNDRV_SEQ_PORT_TYPE_MIDI_GENERIC |
1708 SNDRV_SEQ_PORT_TYPE_HARDWARE),
1709 /* Access Music Virus TI */
1710 EXTERNAL_PORT(0x133e, 0x0815, 0, "%s MIDI"),
1711 PORT_INFO(0x133e, 0x0815, 1, "%s Synth", 0,
1712 SNDRV_SEQ_PORT_TYPE_MIDI_GENERIC |
1713 SNDRV_SEQ_PORT_TYPE_HARDWARE |
1714 SNDRV_SEQ_PORT_TYPE_SYNTHESIZER),
1715};
1716
1717static struct port_info *find_port_info(struct snd_usb_midi *umidi, int number)
1718{
1719 int i;
1720
1721 for (i = 0; i < ARRAY_SIZE(snd_usbmidi_port_info); ++i) {
1722 if (snd_usbmidi_port_info[i].id == umidi->usb_id &&
1723 snd_usbmidi_port_info[i].port == number)
1724 return &snd_usbmidi_port_info[i];
1725 }
1726 return NULL;
1727}
1728
1729static void snd_usbmidi_get_port_info(struct snd_rawmidi *rmidi, int number,
1730 struct snd_seq_port_info *seq_port_info)
1731{
1732 struct snd_usb_midi *umidi = rmidi->private_data;
1733 struct port_info *port_info;
1734
1735 /* TODO: read port flags from descriptors */
1736 port_info = find_port_info(umidi, number);
1737 if (port_info) {
1738 seq_port_info->type = port_info->seq_flags;
1739 seq_port_info->midi_voices = port_info->voices;
1740 }
1741}
1742
1743static struct usb_midi_in_jack_descriptor *find_usb_in_jack_descriptor(
1744 struct usb_host_interface *hostif, uint8_t jack_id)
1745{
1746 unsigned char *extra = hostif->extra;
1747 int extralen = hostif->extralen;
1748
1749 while (extralen > 4) {
1750 struct usb_midi_in_jack_descriptor *injd =
1751 (struct usb_midi_in_jack_descriptor *)extra;
1752
1753 if (injd->bLength >= sizeof(*injd) &&
1754 injd->bDescriptorType == USB_DT_CS_INTERFACE &&
1755 injd->bDescriptorSubtype == UAC_MIDI_IN_JACK &&
1756 injd->bJackID == jack_id)
1757 return injd;
1758 if (!extra[0])
1759 break;
1760 extralen -= extra[0];
1761 extra += extra[0];
1762 }
1763 return NULL;
1764}
1765
1766static struct usb_midi_out_jack_descriptor *find_usb_out_jack_descriptor(
1767 struct usb_host_interface *hostif, uint8_t jack_id)
1768{
1769 unsigned char *extra = hostif->extra;
1770 int extralen = hostif->extralen;
1771
1772 while (extralen > 4) {
1773 struct usb_midi_out_jack_descriptor *outjd =
1774 (struct usb_midi_out_jack_descriptor *)extra;
1775
1776 if (outjd->bLength >= sizeof(*outjd) &&
1777 outjd->bDescriptorType == USB_DT_CS_INTERFACE &&
1778 outjd->bDescriptorSubtype == UAC_MIDI_OUT_JACK &&
1779 outjd->bJackID == jack_id)
1780 return outjd;
1781 if (!extra[0])
1782 break;
1783 extralen -= extra[0];
1784 extra += extra[0];
1785 }
1786 return NULL;
1787}
1788
1789static void snd_usbmidi_init_substream(struct snd_usb_midi *umidi,
1790 int stream, int number, int jack_id,
1791 struct snd_rawmidi_substream **rsubstream)
1792{
1793 struct port_info *port_info;
1794 const char *name_format;
1795 struct usb_interface *intf;
1796 struct usb_host_interface *hostif;
1797 struct usb_midi_in_jack_descriptor *injd;
1798 struct usb_midi_out_jack_descriptor *outjd;
1799 uint8_t jack_name_buf[32];
1800 uint8_t *default_jack_name = "MIDI";
1801 uint8_t *jack_name = default_jack_name;
1802 uint8_t iJack;
1803 size_t sz;
1804 int res;
1805
1806 struct snd_rawmidi_substream *substream =
1807 snd_usbmidi_find_substream(umidi, stream, number);
1808 if (!substream) {
1809 dev_err(&umidi->dev->dev, "substream %d:%d not found\n", stream,
1810 number);
1811 return;
1812 }
1813
1814 intf = umidi->iface;
1815 if (intf && jack_id >= 0) {
1816 hostif = intf->cur_altsetting;
1817 iJack = 0;
1818 if (stream != SNDRV_RAWMIDI_STREAM_OUTPUT) {
1819 /* in jacks connect to outs */
1820 outjd = find_usb_out_jack_descriptor(hostif, jack_id);
1821 if (outjd) {
1822 sz = USB_DT_MIDI_OUT_SIZE(outjd->bNrInputPins);
1823 if (outjd->bLength >= sz)
1824 iJack = *(((uint8_t *) outjd) + sz - sizeof(uint8_t));
1825 }
1826 } else {
1827 /* and out jacks connect to ins */
1828 injd = find_usb_in_jack_descriptor(hostif, jack_id);
1829 if (injd)
1830 iJack = injd->iJack;
1831 }
1832 if (iJack != 0) {
1833 res = usb_string(umidi->dev, iJack, jack_name_buf,
1834 ARRAY_SIZE(jack_name_buf));
1835 if (res)
1836 jack_name = jack_name_buf;
1837 }
1838 }
1839
1840 port_info = find_port_info(umidi, number);
1841 name_format = port_info ? port_info->name :
1842 (jack_name != default_jack_name ? "%s %s" : "%s %s %d");
1843 snprintf(substream->name, sizeof(substream->name),
1844 name_format, umidi->card->shortname, jack_name, number + 1);
1845
1846 *rsubstream = substream;
1847}
1848
1849/*
1850 * Creates the endpoints and their ports.
1851 */
1852static int snd_usbmidi_create_endpoints(struct snd_usb_midi *umidi,
1853 struct snd_usb_midi_endpoint_info *endpoints)
1854{
1855 int i, j, err;
1856 int out_ports = 0, in_ports = 0;
1857
1858 for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i) {
1859 if (endpoints[i].out_cables) {
1860 err = snd_usbmidi_out_endpoint_create(umidi,
1861 &endpoints[i],
1862 &umidi->endpoints[i]);
1863 if (err < 0)
1864 return err;
1865 }
1866 if (endpoints[i].in_cables) {
1867 err = snd_usbmidi_in_endpoint_create(umidi,
1868 &endpoints[i],
1869 &umidi->endpoints[i]);
1870 if (err < 0)
1871 return err;
1872 }
1873
1874 for (j = 0; j < 0x10; ++j) {
1875 if (endpoints[i].out_cables & (1 << j)) {
1876 snd_usbmidi_init_substream(umidi,
1877 SNDRV_RAWMIDI_STREAM_OUTPUT,
1878 out_ports,
1879 endpoints[i].assoc_out_jacks[j],
1880 &umidi->endpoints[i].out->ports[j].substream);
1881 ++out_ports;
1882 }
1883 if (endpoints[i].in_cables & (1 << j)) {
1884 snd_usbmidi_init_substream(umidi,
1885 SNDRV_RAWMIDI_STREAM_INPUT,
1886 in_ports,
1887 endpoints[i].assoc_in_jacks[j],
1888 &umidi->endpoints[i].in->ports[j].substream);
1889 ++in_ports;
1890 }
1891 }
1892 }
1893 dev_dbg(&umidi->dev->dev, "created %d output and %d input ports\n",
1894 out_ports, in_ports);
1895 return 0;
1896}
1897
1898static struct usb_ms_endpoint_descriptor *find_usb_ms_endpoint_descriptor(
1899 struct usb_host_endpoint *hostep)
1900{
1901 unsigned char *extra = hostep->extra;
1902 int extralen = hostep->extralen;
1903
1904 while (extralen > 3) {
1905 struct usb_ms_endpoint_descriptor *ms_ep =
1906 (struct usb_ms_endpoint_descriptor *)extra;
1907
1908 if (ms_ep->bLength > 3 &&
1909 ms_ep->bDescriptorType == USB_DT_CS_ENDPOINT &&
1910 ms_ep->bDescriptorSubtype == UAC_MS_GENERAL)
1911 return ms_ep;
1912 if (!extra[0])
1913 break;
1914 extralen -= extra[0];
1915 extra += extra[0];
1916 }
1917 return NULL;
1918}
1919
1920/*
1921 * Returns MIDIStreaming device capabilities.
1922 */
1923static int snd_usbmidi_get_ms_info(struct snd_usb_midi *umidi,
1924 struct snd_usb_midi_endpoint_info *endpoints)
1925{
1926 struct usb_interface *intf;
1927 struct usb_host_interface *hostif;
1928 struct usb_interface_descriptor *intfd;
1929 struct usb_ms_header_descriptor *ms_header;
1930 struct usb_host_endpoint *hostep;
1931 struct usb_endpoint_descriptor *ep;
1932 struct usb_ms_endpoint_descriptor *ms_ep;
1933 int i, j, epidx;
1934
1935 intf = umidi->iface;
1936 if (!intf)
1937 return -ENXIO;
1938 hostif = &intf->altsetting[0];
1939 intfd = get_iface_desc(hostif);
1940 ms_header = (struct usb_ms_header_descriptor *)hostif->extra;
1941 if (hostif->extralen >= 7 &&
1942 ms_header->bLength >= 7 &&
1943 ms_header->bDescriptorType == USB_DT_CS_INTERFACE &&
1944 ms_header->bDescriptorSubtype == UAC_HEADER)
1945 dev_dbg(&umidi->dev->dev, "MIDIStreaming version %02x.%02x\n",
1946 ((uint8_t *)&ms_header->bcdMSC)[1], ((uint8_t *)&ms_header->bcdMSC)[0]);
1947 else
1948 dev_warn(&umidi->dev->dev,
1949 "MIDIStreaming interface descriptor not found\n");
1950
1951 epidx = 0;
1952 for (i = 0; i < intfd->bNumEndpoints; ++i) {
1953 hostep = &hostif->endpoint[i];
1954 ep = get_ep_desc(hostep);
1955 if (!usb_endpoint_xfer_bulk(ep) && !usb_endpoint_xfer_int(ep))
1956 continue;
1957 ms_ep = find_usb_ms_endpoint_descriptor(hostep);
1958 if (!ms_ep)
1959 continue;
1960 if (ms_ep->bLength <= sizeof(*ms_ep))
1961 continue;
1962 if (ms_ep->bNumEmbMIDIJack > 0x10)
1963 continue;
1964 if (ms_ep->bLength < sizeof(*ms_ep) + ms_ep->bNumEmbMIDIJack)
1965 continue;
1966 if (usb_endpoint_dir_out(ep)) {
1967 if (endpoints[epidx].out_ep) {
1968 if (++epidx >= MIDI_MAX_ENDPOINTS) {
1969 dev_warn(&umidi->dev->dev,
1970 "too many endpoints\n");
1971 break;
1972 }
1973 }
1974 endpoints[epidx].out_ep = usb_endpoint_num(ep);
1975 if (usb_endpoint_xfer_int(ep))
1976 endpoints[epidx].out_interval = ep->bInterval;
1977 else if (snd_usb_get_speed(umidi->dev) == USB_SPEED_LOW)
1978 /*
1979 * Low speed bulk transfers don't exist, so
1980 * force interrupt transfers for devices like
1981 * ESI MIDI Mate that try to use them anyway.
1982 */
1983 endpoints[epidx].out_interval = 1;
1984 endpoints[epidx].out_cables =
1985 (1 << ms_ep->bNumEmbMIDIJack) - 1;
1986 for (j = 0; j < ms_ep->bNumEmbMIDIJack; ++j)
1987 endpoints[epidx].assoc_out_jacks[j] = ms_ep->baAssocJackID[j];
1988 for (; j < ARRAY_SIZE(endpoints[epidx].assoc_out_jacks); ++j)
1989 endpoints[epidx].assoc_out_jacks[j] = -1;
1990 dev_dbg(&umidi->dev->dev, "EP %02X: %d jack(s)\n",
1991 ep->bEndpointAddress, ms_ep->bNumEmbMIDIJack);
1992 } else {
1993 if (endpoints[epidx].in_ep) {
1994 if (++epidx >= MIDI_MAX_ENDPOINTS) {
1995 dev_warn(&umidi->dev->dev,
1996 "too many endpoints\n");
1997 break;
1998 }
1999 }
2000 endpoints[epidx].in_ep = usb_endpoint_num(ep);
2001 if (usb_endpoint_xfer_int(ep))
2002 endpoints[epidx].in_interval = ep->bInterval;
2003 else if (snd_usb_get_speed(umidi->dev) == USB_SPEED_LOW)
2004 endpoints[epidx].in_interval = 1;
2005 endpoints[epidx].in_cables =
2006 (1 << ms_ep->bNumEmbMIDIJack) - 1;
2007 for (j = 0; j < ms_ep->bNumEmbMIDIJack; ++j)
2008 endpoints[epidx].assoc_in_jacks[j] = ms_ep->baAssocJackID[j];
2009 for (; j < ARRAY_SIZE(endpoints[epidx].assoc_in_jacks); ++j)
2010 endpoints[epidx].assoc_in_jacks[j] = -1;
2011 dev_dbg(&umidi->dev->dev, "EP %02X: %d jack(s)\n",
2012 ep->bEndpointAddress, ms_ep->bNumEmbMIDIJack);
2013 }
2014 }
2015 return 0;
2016}
2017
2018static int roland_load_info(struct snd_kcontrol *kcontrol,
2019 struct snd_ctl_elem_info *info)
2020{
2021 static const char *const names[] = { "High Load", "Light Load" };
2022
2023 return snd_ctl_enum_info(info, 1, 2, names);
2024}
2025
2026static int roland_load_get(struct snd_kcontrol *kcontrol,
2027 struct snd_ctl_elem_value *value)
2028{
2029 value->value.enumerated.item[0] = kcontrol->private_value;
2030 return 0;
2031}
2032
2033static int roland_load_put(struct snd_kcontrol *kcontrol,
2034 struct snd_ctl_elem_value *value)
2035{
2036 struct snd_usb_midi *umidi = kcontrol->private_data;
2037 int changed;
2038
2039 if (value->value.enumerated.item[0] > 1)
2040 return -EINVAL;
2041 mutex_lock(&umidi->mutex);
2042 changed = value->value.enumerated.item[0] != kcontrol->private_value;
2043 if (changed)
2044 kcontrol->private_value = value->value.enumerated.item[0];
2045 mutex_unlock(&umidi->mutex);
2046 return changed;
2047}
2048
2049static const struct snd_kcontrol_new roland_load_ctl = {
2050 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
2051 .name = "MIDI Input Mode",
2052 .info = roland_load_info,
2053 .get = roland_load_get,
2054 .put = roland_load_put,
2055 .private_value = 1,
2056};
2057
2058/*
2059 * On Roland devices, use the second alternate setting to be able to use
2060 * the interrupt input endpoint.
2061 */
2062static void snd_usbmidi_switch_roland_altsetting(struct snd_usb_midi *umidi)
2063{
2064 struct usb_interface *intf;
2065 struct usb_host_interface *hostif;
2066 struct usb_interface_descriptor *intfd;
2067
2068 intf = umidi->iface;
2069 if (!intf || intf->num_altsetting != 2)
2070 return;
2071
2072 hostif = &intf->altsetting[1];
2073 intfd = get_iface_desc(hostif);
2074 /* If either or both of the endpoints support interrupt transfer,
2075 * then use the alternate setting
2076 */
2077 if (intfd->bNumEndpoints != 2 ||
2078 !((get_endpoint(hostif, 0)->bmAttributes &
2079 USB_ENDPOINT_XFERTYPE_MASK) == USB_ENDPOINT_XFER_INT ||
2080 (get_endpoint(hostif, 1)->bmAttributes &
2081 USB_ENDPOINT_XFERTYPE_MASK) == USB_ENDPOINT_XFER_INT))
2082 return;
2083
2084 dev_dbg(&umidi->dev->dev, "switching to altsetting %d with int ep\n",
2085 intfd->bAlternateSetting);
2086 usb_set_interface(umidi->dev, intfd->bInterfaceNumber,
2087 intfd->bAlternateSetting);
2088
2089 umidi->roland_load_ctl = snd_ctl_new1(&roland_load_ctl, umidi);
2090 if (snd_ctl_add(umidi->card, umidi->roland_load_ctl) < 0)
2091 umidi->roland_load_ctl = NULL;
2092}
2093
2094/*
2095 * Try to find any usable endpoints in the interface.
2096 */
2097static int snd_usbmidi_detect_endpoints(struct snd_usb_midi *umidi,
2098 struct snd_usb_midi_endpoint_info *endpoint,
2099 int max_endpoints)
2100{
2101 struct usb_interface *intf;
2102 struct usb_host_interface *hostif;
2103 struct usb_interface_descriptor *intfd;
2104 struct usb_endpoint_descriptor *epd;
2105 int i, out_eps = 0, in_eps = 0;
2106
2107 if (USB_ID_VENDOR(umidi->usb_id) == 0x0582)
2108 snd_usbmidi_switch_roland_altsetting(umidi);
2109
2110 if (endpoint[0].out_ep || endpoint[0].in_ep)
2111 return 0;
2112
2113 intf = umidi->iface;
2114 if (!intf || intf->num_altsetting < 1)
2115 return -ENOENT;
2116 hostif = intf->cur_altsetting;
2117 intfd = get_iface_desc(hostif);
2118
2119 for (i = 0; i < intfd->bNumEndpoints; ++i) {
2120 epd = get_endpoint(hostif, i);
2121 if (!usb_endpoint_xfer_bulk(epd) &&
2122 !usb_endpoint_xfer_int(epd))
2123 continue;
2124 if (out_eps < max_endpoints &&
2125 usb_endpoint_dir_out(epd)) {
2126 endpoint[out_eps].out_ep = usb_endpoint_num(epd);
2127 if (usb_endpoint_xfer_int(epd))
2128 endpoint[out_eps].out_interval = epd->bInterval;
2129 ++out_eps;
2130 }
2131 if (in_eps < max_endpoints &&
2132 usb_endpoint_dir_in(epd)) {
2133 endpoint[in_eps].in_ep = usb_endpoint_num(epd);
2134 if (usb_endpoint_xfer_int(epd))
2135 endpoint[in_eps].in_interval = epd->bInterval;
2136 ++in_eps;
2137 }
2138 }
2139 return (out_eps || in_eps) ? 0 : -ENOENT;
2140}
2141
2142/*
2143 * Detects the endpoints for one-port-per-endpoint protocols.
2144 */
2145static int snd_usbmidi_detect_per_port_endpoints(struct snd_usb_midi *umidi,
2146 struct snd_usb_midi_endpoint_info *endpoints)
2147{
2148 int err, i;
2149
2150 err = snd_usbmidi_detect_endpoints(umidi, endpoints, MIDI_MAX_ENDPOINTS);
2151 for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i) {
2152 if (endpoints[i].out_ep)
2153 endpoints[i].out_cables = 0x0001;
2154 if (endpoints[i].in_ep)
2155 endpoints[i].in_cables = 0x0001;
2156 }
2157 return err;
2158}
2159
2160/*
2161 * Detects the endpoints and ports of Yamaha devices.
2162 */
2163static int snd_usbmidi_detect_yamaha(struct snd_usb_midi *umidi,
2164 struct snd_usb_midi_endpoint_info *endpoint)
2165{
2166 struct usb_interface *intf;
2167 struct usb_host_interface *hostif;
2168 struct usb_interface_descriptor *intfd;
2169 uint8_t *cs_desc;
2170
2171 intf = umidi->iface;
2172 if (!intf)
2173 return -ENOENT;
2174 hostif = intf->altsetting;
2175 intfd = get_iface_desc(hostif);
2176 if (intfd->bNumEndpoints < 1)
2177 return -ENOENT;
2178
2179 /*
2180 * For each port there is one MIDI_IN/OUT_JACK descriptor, not
2181 * necessarily with any useful contents. So simply count 'em.
2182 */
2183 for (cs_desc = hostif->extra;
2184 cs_desc < hostif->extra + hostif->extralen && cs_desc[0] >= 2;
2185 cs_desc += cs_desc[0]) {
2186 if (cs_desc[1] == USB_DT_CS_INTERFACE) {
2187 if (cs_desc[2] == UAC_MIDI_IN_JACK)
2188 endpoint->in_cables =
2189 (endpoint->in_cables << 1) | 1;
2190 else if (cs_desc[2] == UAC_MIDI_OUT_JACK)
2191 endpoint->out_cables =
2192 (endpoint->out_cables << 1) | 1;
2193 }
2194 }
2195 if (!endpoint->in_cables && !endpoint->out_cables)
2196 return -ENOENT;
2197
2198 return snd_usbmidi_detect_endpoints(umidi, endpoint, 1);
2199}
2200
2201/*
2202 * Detects the endpoints and ports of Roland devices.
2203 */
2204static int snd_usbmidi_detect_roland(struct snd_usb_midi *umidi,
2205 struct snd_usb_midi_endpoint_info *endpoint)
2206{
2207 struct usb_interface *intf;
2208 struct usb_host_interface *hostif;
2209 u8 *cs_desc;
2210
2211 intf = umidi->iface;
2212 if (!intf)
2213 return -ENOENT;
2214 hostif = intf->altsetting;
2215 /*
2216 * Some devices have a descriptor <06 24 F1 02 <inputs> <outputs>>,
2217 * some have standard class descriptors, or both kinds, or neither.
2218 */
2219 for (cs_desc = hostif->extra;
2220 cs_desc < hostif->extra + hostif->extralen && cs_desc[0] >= 2;
2221 cs_desc += cs_desc[0]) {
2222 if (cs_desc[0] >= 6 &&
2223 cs_desc[1] == USB_DT_CS_INTERFACE &&
2224 cs_desc[2] == 0xf1 &&
2225 cs_desc[3] == 0x02) {
2226 if (cs_desc[4] > 0x10 || cs_desc[5] > 0x10)
2227 continue;
2228 endpoint->in_cables = (1 << cs_desc[4]) - 1;
2229 endpoint->out_cables = (1 << cs_desc[5]) - 1;
2230 return snd_usbmidi_detect_endpoints(umidi, endpoint, 1);
2231 } else if (cs_desc[0] >= 7 &&
2232 cs_desc[1] == USB_DT_CS_INTERFACE &&
2233 cs_desc[2] == UAC_HEADER) {
2234 return snd_usbmidi_get_ms_info(umidi, endpoint);
2235 }
2236 }
2237
2238 return -ENODEV;
2239}
2240
2241/*
2242 * Creates the endpoints and their ports for Midiman devices.
2243 */
2244static int snd_usbmidi_create_endpoints_midiman(struct snd_usb_midi *umidi,
2245 struct snd_usb_midi_endpoint_info *endpoint)
2246{
2247 struct snd_usb_midi_endpoint_info ep_info;
2248 struct usb_interface *intf;
2249 struct usb_host_interface *hostif;
2250 struct usb_interface_descriptor *intfd;
2251 struct usb_endpoint_descriptor *epd;
2252 int cable, err;
2253
2254 intf = umidi->iface;
2255 if (!intf)
2256 return -ENOENT;
2257 hostif = intf->altsetting;
2258 intfd = get_iface_desc(hostif);
2259 /*
2260 * The various MidiSport devices have more or less random endpoint
2261 * numbers, so we have to identify the endpoints by their index in
2262 * the descriptor array, like the driver for that other OS does.
2263 *
2264 * There is one interrupt input endpoint for all input ports, one
2265 * bulk output endpoint for even-numbered ports, and one for odd-
2266 * numbered ports. Both bulk output endpoints have corresponding
2267 * input bulk endpoints (at indices 1 and 3) which aren't used.
2268 */
2269 if (intfd->bNumEndpoints < (endpoint->out_cables > 0x0001 ? 5 : 3)) {
2270 dev_dbg(&umidi->dev->dev, "not enough endpoints\n");
2271 return -ENOENT;
2272 }
2273
2274 epd = get_endpoint(hostif, 0);
2275 if (!usb_endpoint_dir_in(epd) || !usb_endpoint_xfer_int(epd)) {
2276 dev_dbg(&umidi->dev->dev, "endpoint[0] isn't interrupt\n");
2277 return -ENXIO;
2278 }
2279 epd = get_endpoint(hostif, 2);
2280 if (!usb_endpoint_dir_out(epd) || !usb_endpoint_xfer_bulk(epd)) {
2281 dev_dbg(&umidi->dev->dev, "endpoint[2] isn't bulk output\n");
2282 return -ENXIO;
2283 }
2284 if (endpoint->out_cables > 0x0001) {
2285 epd = get_endpoint(hostif, 4);
2286 if (!usb_endpoint_dir_out(epd) ||
2287 !usb_endpoint_xfer_bulk(epd)) {
2288 dev_dbg(&umidi->dev->dev,
2289 "endpoint[4] isn't bulk output\n");
2290 return -ENXIO;
2291 }
2292 }
2293
2294 ep_info.out_ep = get_endpoint(hostif, 2)->bEndpointAddress &
2295 USB_ENDPOINT_NUMBER_MASK;
2296 ep_info.out_interval = 0;
2297 ep_info.out_cables = endpoint->out_cables & 0x5555;
2298 err = snd_usbmidi_out_endpoint_create(umidi, &ep_info,
2299 &umidi->endpoints[0]);
2300 if (err < 0)
2301 return err;
2302
2303 ep_info.in_ep = get_endpoint(hostif, 0)->bEndpointAddress &
2304 USB_ENDPOINT_NUMBER_MASK;
2305 ep_info.in_interval = get_endpoint(hostif, 0)->bInterval;
2306 ep_info.in_cables = endpoint->in_cables;
2307 err = snd_usbmidi_in_endpoint_create(umidi, &ep_info,
2308 &umidi->endpoints[0]);
2309 if (err < 0)
2310 return err;
2311
2312 if (endpoint->out_cables > 0x0001) {
2313 ep_info.out_ep = get_endpoint(hostif, 4)->bEndpointAddress &
2314 USB_ENDPOINT_NUMBER_MASK;
2315 ep_info.out_cables = endpoint->out_cables & 0xaaaa;
2316 err = snd_usbmidi_out_endpoint_create(umidi, &ep_info,
2317 &umidi->endpoints[1]);
2318 if (err < 0)
2319 return err;
2320 }
2321
2322 for (cable = 0; cable < 0x10; ++cable) {
2323 if (endpoint->out_cables & (1 << cable))
2324 snd_usbmidi_init_substream(umidi,
2325 SNDRV_RAWMIDI_STREAM_OUTPUT,
2326 cable,
2327 -1 /* prevent trying to find jack */,
2328 &umidi->endpoints[cable & 1].out->ports[cable].substream);
2329 if (endpoint->in_cables & (1 << cable))
2330 snd_usbmidi_init_substream(umidi,
2331 SNDRV_RAWMIDI_STREAM_INPUT,
2332 cable,
2333 -1 /* prevent trying to find jack */,
2334 &umidi->endpoints[0].in->ports[cable].substream);
2335 }
2336 return 0;
2337}
2338
2339static const struct snd_rawmidi_global_ops snd_usbmidi_ops = {
2340 .get_port_info = snd_usbmidi_get_port_info,
2341};
2342
2343static int snd_usbmidi_create_rawmidi(struct snd_usb_midi *umidi,
2344 int out_ports, int in_ports)
2345{
2346 struct snd_rawmidi *rmidi;
2347 int err;
2348
2349 err = snd_rawmidi_new(umidi->card, "USB MIDI",
2350 umidi->next_midi_device++,
2351 out_ports, in_ports, &rmidi);
2352 if (err < 0)
2353 return err;
2354 strcpy(rmidi->name, umidi->card->shortname);
2355 rmidi->info_flags = SNDRV_RAWMIDI_INFO_OUTPUT |
2356 SNDRV_RAWMIDI_INFO_INPUT |
2357 SNDRV_RAWMIDI_INFO_DUPLEX;
2358 rmidi->ops = &snd_usbmidi_ops;
2359 rmidi->private_data = umidi;
2360 rmidi->private_free = snd_usbmidi_rawmidi_free;
2361 snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT,
2362 &snd_usbmidi_output_ops);
2363 snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_INPUT,
2364 &snd_usbmidi_input_ops);
2365
2366 umidi->rmidi = rmidi;
2367 return 0;
2368}
2369
2370/*
2371 * Temporarily stop input.
2372 */
2373void snd_usbmidi_input_stop(struct list_head *p)
2374{
2375 struct snd_usb_midi *umidi;
2376 unsigned int i, j;
2377
2378 umidi = list_entry(p, struct snd_usb_midi, list);
2379 if (!umidi->input_running)
2380 return;
2381 for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i) {
2382 struct snd_usb_midi_endpoint *ep = &umidi->endpoints[i];
2383 if (ep->in)
2384 for (j = 0; j < INPUT_URBS; ++j)
2385 usb_kill_urb(ep->in->urbs[j]);
2386 }
2387 umidi->input_running = 0;
2388}
2389EXPORT_SYMBOL(snd_usbmidi_input_stop);
2390
2391static void snd_usbmidi_input_start_ep(struct snd_usb_midi *umidi,
2392 struct snd_usb_midi_in_endpoint *ep)
2393{
2394 unsigned int i;
2395 unsigned long flags;
2396
2397 if (!ep)
2398 return;
2399 for (i = 0; i < INPUT_URBS; ++i) {
2400 struct urb *urb = ep->urbs[i];
2401 spin_lock_irqsave(&umidi->disc_lock, flags);
2402 if (!atomic_read(&urb->use_count)) {
2403 urb->dev = ep->umidi->dev;
2404 snd_usbmidi_submit_urb(urb, GFP_ATOMIC);
2405 }
2406 spin_unlock_irqrestore(&umidi->disc_lock, flags);
2407 }
2408}
2409
2410/*
2411 * Resume input after a call to snd_usbmidi_input_stop().
2412 */
2413void snd_usbmidi_input_start(struct list_head *p)
2414{
2415 struct snd_usb_midi *umidi;
2416 int i;
2417
2418 umidi = list_entry(p, struct snd_usb_midi, list);
2419 if (umidi->input_running || !umidi->opened[1])
2420 return;
2421 for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i)
2422 snd_usbmidi_input_start_ep(umidi, umidi->endpoints[i].in);
2423 umidi->input_running = 1;
2424}
2425EXPORT_SYMBOL(snd_usbmidi_input_start);
2426
2427/*
2428 * Prepare for suspend. Typically called from the USB suspend callback.
2429 */
2430void snd_usbmidi_suspend(struct list_head *p)
2431{
2432 struct snd_usb_midi *umidi;
2433
2434 umidi = list_entry(p, struct snd_usb_midi, list);
2435 mutex_lock(&umidi->mutex);
2436 snd_usbmidi_input_stop(p);
2437 mutex_unlock(&umidi->mutex);
2438}
2439EXPORT_SYMBOL(snd_usbmidi_suspend);
2440
2441/*
2442 * Resume. Typically called from the USB resume callback.
2443 */
2444void snd_usbmidi_resume(struct list_head *p)
2445{
2446 struct snd_usb_midi *umidi;
2447
2448 umidi = list_entry(p, struct snd_usb_midi, list);
2449 mutex_lock(&umidi->mutex);
2450 snd_usbmidi_input_start(p);
2451 mutex_unlock(&umidi->mutex);
2452}
2453EXPORT_SYMBOL(snd_usbmidi_resume);
2454
2455/*
2456 * Creates and registers everything needed for a MIDI streaming interface.
2457 */
2458int __snd_usbmidi_create(struct snd_card *card,
2459 struct usb_interface *iface,
2460 struct list_head *midi_list,
2461 const struct snd_usb_audio_quirk *quirk,
2462 unsigned int usb_id)
2463{
2464 struct snd_usb_midi *umidi;
2465 struct snd_usb_midi_endpoint_info endpoints[MIDI_MAX_ENDPOINTS];
2466 int out_ports, in_ports;
2467 int i, err;
2468
2469 umidi = kzalloc(sizeof(*umidi), GFP_KERNEL);
2470 if (!umidi)
2471 return -ENOMEM;
2472 umidi->dev = interface_to_usbdev(iface);
2473 umidi->card = card;
2474 umidi->iface = iface;
2475 umidi->quirk = quirk;
2476 umidi->usb_protocol_ops = &snd_usbmidi_standard_ops;
2477 spin_lock_init(&umidi->disc_lock);
2478 init_rwsem(&umidi->disc_rwsem);
2479 mutex_init(&umidi->mutex);
2480 if (!usb_id)
2481 usb_id = USB_ID(le16_to_cpu(umidi->dev->descriptor.idVendor),
2482 le16_to_cpu(umidi->dev->descriptor.idProduct));
2483 umidi->usb_id = usb_id;
2484 timer_setup(&umidi->error_timer, snd_usbmidi_error_timer, 0);
2485
2486 /* detect the endpoint(s) to use */
2487 memset(endpoints, 0, sizeof(endpoints));
2488 switch (quirk ? quirk->type : QUIRK_MIDI_STANDARD_INTERFACE) {
2489 case QUIRK_MIDI_STANDARD_INTERFACE:
2490 err = snd_usbmidi_get_ms_info(umidi, endpoints);
2491 if (umidi->usb_id == USB_ID(0x0763, 0x0150)) /* M-Audio Uno */
2492 umidi->usb_protocol_ops =
2493 &snd_usbmidi_maudio_broken_running_status_ops;
2494 break;
2495 case QUIRK_MIDI_US122L:
2496 umidi->usb_protocol_ops = &snd_usbmidi_122l_ops;
2497 fallthrough;
2498 case QUIRK_MIDI_FIXED_ENDPOINT:
2499 memcpy(&endpoints[0], quirk->data,
2500 sizeof(struct snd_usb_midi_endpoint_info));
2501 err = snd_usbmidi_detect_endpoints(umidi, &endpoints[0], 1);
2502 break;
2503 case QUIRK_MIDI_YAMAHA:
2504 err = snd_usbmidi_detect_yamaha(umidi, &endpoints[0]);
2505 break;
2506 case QUIRK_MIDI_ROLAND:
2507 err = snd_usbmidi_detect_roland(umidi, &endpoints[0]);
2508 break;
2509 case QUIRK_MIDI_MIDIMAN:
2510 umidi->usb_protocol_ops = &snd_usbmidi_midiman_ops;
2511 memcpy(&endpoints[0], quirk->data,
2512 sizeof(struct snd_usb_midi_endpoint_info));
2513 err = 0;
2514 break;
2515 case QUIRK_MIDI_NOVATION:
2516 umidi->usb_protocol_ops = &snd_usbmidi_novation_ops;
2517 err = snd_usbmidi_detect_per_port_endpoints(umidi, endpoints);
2518 break;
2519 case QUIRK_MIDI_RAW_BYTES:
2520 umidi->usb_protocol_ops = &snd_usbmidi_raw_ops;
2521 /*
2522 * Interface 1 contains isochronous endpoints, but with the same
2523 * numbers as in interface 0. Since it is interface 1 that the
2524 * USB core has most recently seen, these descriptors are now
2525 * associated with the endpoint numbers. This will foul up our
2526 * attempts to submit bulk/interrupt URBs to the endpoints in
2527 * interface 0, so we have to make sure that the USB core looks
2528 * again at interface 0 by calling usb_set_interface() on it.
2529 */
2530 if (umidi->usb_id == USB_ID(0x07fd, 0x0001)) /* MOTU Fastlane */
2531 usb_set_interface(umidi->dev, 0, 0);
2532 err = snd_usbmidi_detect_per_port_endpoints(umidi, endpoints);
2533 break;
2534 case QUIRK_MIDI_EMAGIC:
2535 umidi->usb_protocol_ops = &snd_usbmidi_emagic_ops;
2536 memcpy(&endpoints[0], quirk->data,
2537 sizeof(struct snd_usb_midi_endpoint_info));
2538 err = snd_usbmidi_detect_endpoints(umidi, &endpoints[0], 1);
2539 break;
2540 case QUIRK_MIDI_CME:
2541 umidi->usb_protocol_ops = &snd_usbmidi_cme_ops;
2542 err = snd_usbmidi_detect_per_port_endpoints(umidi, endpoints);
2543 break;
2544 case QUIRK_MIDI_AKAI:
2545 umidi->usb_protocol_ops = &snd_usbmidi_akai_ops;
2546 err = snd_usbmidi_detect_per_port_endpoints(umidi, endpoints);
2547 /* endpoint 1 is input-only */
2548 endpoints[1].out_cables = 0;
2549 break;
2550 case QUIRK_MIDI_FTDI:
2551 umidi->usb_protocol_ops = &snd_usbmidi_ftdi_ops;
2552
2553 /* set baud rate to 31250 (48 MHz / 16 / 96) */
2554 err = usb_control_msg(umidi->dev, usb_sndctrlpipe(umidi->dev, 0),
2555 3, 0x40, 0x60, 0, NULL, 0, 1000);
2556 if (err < 0)
2557 break;
2558
2559 err = snd_usbmidi_detect_per_port_endpoints(umidi, endpoints);
2560 break;
2561 case QUIRK_MIDI_CH345:
2562 umidi->usb_protocol_ops = &snd_usbmidi_ch345_broken_sysex_ops;
2563 err = snd_usbmidi_detect_per_port_endpoints(umidi, endpoints);
2564 break;
2565 default:
2566 dev_err(&umidi->dev->dev, "invalid quirk type %d\n",
2567 quirk->type);
2568 err = -ENXIO;
2569 break;
2570 }
2571 if (err < 0)
2572 goto free_midi;
2573
2574 /* create rawmidi device */
2575 out_ports = 0;
2576 in_ports = 0;
2577 for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i) {
2578 out_ports += hweight16(endpoints[i].out_cables);
2579 in_ports += hweight16(endpoints[i].in_cables);
2580 }
2581 err = snd_usbmidi_create_rawmidi(umidi, out_ports, in_ports);
2582 if (err < 0)
2583 goto free_midi;
2584
2585 /* create endpoint/port structures */
2586 if (quirk && quirk->type == QUIRK_MIDI_MIDIMAN)
2587 err = snd_usbmidi_create_endpoints_midiman(umidi, &endpoints[0]);
2588 else
2589 err = snd_usbmidi_create_endpoints(umidi, endpoints);
2590 if (err < 0)
2591 goto exit;
2592
2593 usb_autopm_get_interface_no_resume(umidi->iface);
2594
2595 list_add_tail(&umidi->list, midi_list);
2596 return 0;
2597
2598free_midi:
2599 kfree(umidi);
2600exit:
2601 return err;
2602}
2603EXPORT_SYMBOL(__snd_usbmidi_create);
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/usb/midi.h>
51#include <linux/module.h>
52
53#include <sound/core.h>
54#include <sound/control.h>
55#include <sound/rawmidi.h>
56#include <sound/asequencer.h>
57#include "usbaudio.h"
58#include "midi.h"
59#include "power.h"
60#include "helper.h"
61
62/*
63 * define this to log all USB packets
64 */
65/* #define DUMP_PACKETS */
66
67/*
68 * how long to wait after some USB errors, so that hub_wq can disconnect() us
69 * without too many spurious errors
70 */
71#define ERROR_DELAY_JIFFIES (HZ / 10)
72
73#define OUTPUT_URBS 7
74#define INPUT_URBS 7
75
76
77MODULE_AUTHOR("Clemens Ladisch <clemens@ladisch.de>");
78MODULE_DESCRIPTION("USB Audio/MIDI helper module");
79MODULE_LICENSE("Dual BSD/GPL");
80
81struct snd_usb_midi_in_endpoint;
82struct snd_usb_midi_out_endpoint;
83struct snd_usb_midi_endpoint;
84
85struct usb_protocol_ops {
86 void (*input)(struct snd_usb_midi_in_endpoint*, uint8_t*, int);
87 void (*output)(struct snd_usb_midi_out_endpoint *ep, struct urb *urb);
88 void (*output_packet)(struct urb*, uint8_t, uint8_t, uint8_t, uint8_t);
89 void (*init_out_endpoint)(struct snd_usb_midi_out_endpoint *);
90 void (*finish_out_endpoint)(struct snd_usb_midi_out_endpoint *);
91};
92
93struct snd_usb_midi {
94 struct usb_device *dev;
95 struct snd_card *card;
96 struct usb_interface *iface;
97 const struct snd_usb_audio_quirk *quirk;
98 struct snd_rawmidi *rmidi;
99 const struct usb_protocol_ops *usb_protocol_ops;
100 struct list_head list;
101 struct timer_list error_timer;
102 spinlock_t disc_lock;
103 struct rw_semaphore disc_rwsem;
104 struct mutex mutex;
105 u32 usb_id;
106 int next_midi_device;
107
108 struct snd_usb_midi_endpoint {
109 struct snd_usb_midi_out_endpoint *out;
110 struct snd_usb_midi_in_endpoint *in;
111 } endpoints[MIDI_MAX_ENDPOINTS];
112 unsigned long input_triggered;
113 unsigned int opened[2];
114 unsigned char disconnected;
115 unsigned char input_running;
116
117 struct snd_kcontrol *roland_load_ctl;
118};
119
120struct snd_usb_midi_out_endpoint {
121 struct snd_usb_midi *umidi;
122 struct out_urb_context {
123 struct urb *urb;
124 struct snd_usb_midi_out_endpoint *ep;
125 } urbs[OUTPUT_URBS];
126 unsigned int active_urbs;
127 unsigned int drain_urbs;
128 int max_transfer; /* size of urb buffer */
129 struct work_struct work;
130 unsigned int next_urb;
131 spinlock_t buffer_lock;
132
133 struct usbmidi_out_port {
134 struct snd_usb_midi_out_endpoint *ep;
135 struct snd_rawmidi_substream *substream;
136 int active;
137 uint8_t cable; /* cable number << 4 */
138 uint8_t state;
139#define STATE_UNKNOWN 0
140#define STATE_1PARAM 1
141#define STATE_2PARAM_1 2
142#define STATE_2PARAM_2 3
143#define STATE_SYSEX_0 4
144#define STATE_SYSEX_1 5
145#define STATE_SYSEX_2 6
146 uint8_t data[2];
147 } ports[0x10];
148 int current_port;
149
150 wait_queue_head_t drain_wait;
151};
152
153struct snd_usb_midi_in_endpoint {
154 struct snd_usb_midi *umidi;
155 struct urb *urbs[INPUT_URBS];
156 struct usbmidi_in_port {
157 struct snd_rawmidi_substream *substream;
158 u8 running_status_length;
159 } ports[0x10];
160 u8 seen_f5;
161 bool in_sysex;
162 u8 last_cin;
163 u8 error_resubmit;
164 int current_port;
165};
166
167static void snd_usbmidi_do_output(struct snd_usb_midi_out_endpoint *ep);
168
169static const uint8_t snd_usbmidi_cin_length[] = {
170 0, 0, 2, 3, 3, 1, 2, 3, 3, 3, 3, 3, 2, 2, 3, 1
171};
172
173/*
174 * Submits the URB, with error handling.
175 */
176static int snd_usbmidi_submit_urb(struct urb *urb, gfp_t flags)
177{
178 int err = usb_submit_urb(urb, flags);
179 if (err < 0 && err != -ENODEV)
180 dev_err(&urb->dev->dev, "usb_submit_urb: %d\n", err);
181 return err;
182}
183
184/*
185 * Error handling for URB completion functions.
186 */
187static int snd_usbmidi_urb_error(const struct urb *urb)
188{
189 switch (urb->status) {
190 /* manually unlinked, or device gone */
191 case -ENOENT:
192 case -ECONNRESET:
193 case -ESHUTDOWN:
194 case -ENODEV:
195 return -ENODEV;
196 /* errors that might occur during unplugging */
197 case -EPROTO:
198 case -ETIME:
199 case -EILSEQ:
200 return -EIO;
201 default:
202 dev_err(&urb->dev->dev, "urb status %d\n", urb->status);
203 return 0; /* continue */
204 }
205}
206
207/*
208 * Receives a chunk of MIDI data.
209 */
210static void snd_usbmidi_input_data(struct snd_usb_midi_in_endpoint *ep,
211 int portidx, uint8_t *data, int length)
212{
213 struct usbmidi_in_port *port = &ep->ports[portidx];
214
215 if (!port->substream) {
216 dev_dbg(&ep->umidi->dev->dev, "unexpected port %d!\n", portidx);
217 return;
218 }
219 if (!test_bit(port->substream->number, &ep->umidi->input_triggered))
220 return;
221 snd_rawmidi_receive(port->substream, data, length);
222}
223
224#ifdef DUMP_PACKETS
225static void dump_urb(const char *type, const u8 *data, int length)
226{
227 snd_printk(KERN_DEBUG "%s packet: [", type);
228 for (; length > 0; ++data, --length)
229 printk(KERN_CONT " %02x", *data);
230 printk(KERN_CONT " ]\n");
231}
232#else
233#define dump_urb(type, data, length) /* nothing */
234#endif
235
236/*
237 * Processes the data read from the device.
238 */
239static void snd_usbmidi_in_urb_complete(struct urb *urb)
240{
241 struct snd_usb_midi_in_endpoint *ep = urb->context;
242
243 if (urb->status == 0) {
244 dump_urb("received", urb->transfer_buffer, urb->actual_length);
245 ep->umidi->usb_protocol_ops->input(ep, urb->transfer_buffer,
246 urb->actual_length);
247 } else {
248 int err = snd_usbmidi_urb_error(urb);
249 if (err < 0) {
250 if (err != -ENODEV) {
251 ep->error_resubmit = 1;
252 mod_timer(&ep->umidi->error_timer,
253 jiffies + ERROR_DELAY_JIFFIES);
254 }
255 return;
256 }
257 }
258
259 urb->dev = ep->umidi->dev;
260 snd_usbmidi_submit_urb(urb, GFP_ATOMIC);
261}
262
263static void snd_usbmidi_out_urb_complete(struct urb *urb)
264{
265 struct out_urb_context *context = urb->context;
266 struct snd_usb_midi_out_endpoint *ep = context->ep;
267 unsigned int urb_index;
268 unsigned long flags;
269
270 spin_lock_irqsave(&ep->buffer_lock, flags);
271 urb_index = context - ep->urbs;
272 ep->active_urbs &= ~(1 << urb_index);
273 if (unlikely(ep->drain_urbs)) {
274 ep->drain_urbs &= ~(1 << urb_index);
275 wake_up(&ep->drain_wait);
276 }
277 spin_unlock_irqrestore(&ep->buffer_lock, flags);
278 if (urb->status < 0) {
279 int err = snd_usbmidi_urb_error(urb);
280 if (err < 0) {
281 if (err != -ENODEV)
282 mod_timer(&ep->umidi->error_timer,
283 jiffies + ERROR_DELAY_JIFFIES);
284 return;
285 }
286 }
287 snd_usbmidi_do_output(ep);
288}
289
290/*
291 * This is called when some data should be transferred to the device
292 * (from one or more substreams).
293 */
294static void snd_usbmidi_do_output(struct snd_usb_midi_out_endpoint *ep)
295{
296 unsigned int urb_index;
297 struct urb *urb;
298 unsigned long flags;
299
300 spin_lock_irqsave(&ep->buffer_lock, flags);
301 if (ep->umidi->disconnected) {
302 spin_unlock_irqrestore(&ep->buffer_lock, flags);
303 return;
304 }
305
306 urb_index = ep->next_urb;
307 for (;;) {
308 if (!(ep->active_urbs & (1 << urb_index))) {
309 urb = ep->urbs[urb_index].urb;
310 urb->transfer_buffer_length = 0;
311 ep->umidi->usb_protocol_ops->output(ep, urb);
312 if (urb->transfer_buffer_length == 0)
313 break;
314
315 dump_urb("sending", urb->transfer_buffer,
316 urb->transfer_buffer_length);
317 urb->dev = ep->umidi->dev;
318 if (snd_usbmidi_submit_urb(urb, GFP_ATOMIC) < 0)
319 break;
320 ep->active_urbs |= 1 << urb_index;
321 }
322 if (++urb_index >= OUTPUT_URBS)
323 urb_index = 0;
324 if (urb_index == ep->next_urb)
325 break;
326 }
327 ep->next_urb = urb_index;
328 spin_unlock_irqrestore(&ep->buffer_lock, flags);
329}
330
331static void snd_usbmidi_out_work(struct work_struct *work)
332{
333 struct snd_usb_midi_out_endpoint *ep =
334 container_of(work, struct snd_usb_midi_out_endpoint, work);
335
336 snd_usbmidi_do_output(ep);
337}
338
339/* called after transfers had been interrupted due to some USB error */
340static void snd_usbmidi_error_timer(struct timer_list *t)
341{
342 struct snd_usb_midi *umidi = from_timer(umidi, t, error_timer);
343 unsigned int i, j;
344
345 spin_lock(&umidi->disc_lock);
346 if (umidi->disconnected) {
347 spin_unlock(&umidi->disc_lock);
348 return;
349 }
350 for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i) {
351 struct snd_usb_midi_in_endpoint *in = umidi->endpoints[i].in;
352 if (in && in->error_resubmit) {
353 in->error_resubmit = 0;
354 for (j = 0; j < INPUT_URBS; ++j) {
355 if (atomic_read(&in->urbs[j]->use_count))
356 continue;
357 in->urbs[j]->dev = umidi->dev;
358 snd_usbmidi_submit_urb(in->urbs[j], GFP_ATOMIC);
359 }
360 }
361 if (umidi->endpoints[i].out)
362 snd_usbmidi_do_output(umidi->endpoints[i].out);
363 }
364 spin_unlock(&umidi->disc_lock);
365}
366
367/* helper function to send static data that may not DMA-able */
368static int send_bulk_static_data(struct snd_usb_midi_out_endpoint *ep,
369 const void *data, int len)
370{
371 int err = 0;
372 void *buf = kmemdup(data, len, GFP_KERNEL);
373 if (!buf)
374 return -ENOMEM;
375 dump_urb("sending", buf, len);
376 if (ep->urbs[0].urb)
377 err = usb_bulk_msg(ep->umidi->dev, ep->urbs[0].urb->pipe,
378 buf, len, NULL, 250);
379 kfree(buf);
380 return err;
381}
382
383/*
384 * Standard USB MIDI protocol: see the spec.
385 * Midiman protocol: like the standard protocol, but the control byte is the
386 * fourth byte in each packet, and uses length instead of CIN.
387 */
388
389static void snd_usbmidi_standard_input(struct snd_usb_midi_in_endpoint *ep,
390 uint8_t *buffer, int buffer_length)
391{
392 int i;
393
394 for (i = 0; i + 3 < buffer_length; i += 4)
395 if (buffer[i] != 0) {
396 int cable = buffer[i] >> 4;
397 int length = snd_usbmidi_cin_length[buffer[i] & 0x0f];
398 snd_usbmidi_input_data(ep, cable, &buffer[i + 1],
399 length);
400 }
401}
402
403static void snd_usbmidi_midiman_input(struct snd_usb_midi_in_endpoint *ep,
404 uint8_t *buffer, int buffer_length)
405{
406 int i;
407
408 for (i = 0; i + 3 < buffer_length; i += 4)
409 if (buffer[i + 3] != 0) {
410 int port = buffer[i + 3] >> 4;
411 int length = buffer[i + 3] & 3;
412 snd_usbmidi_input_data(ep, port, &buffer[i], length);
413 }
414}
415
416/*
417 * Buggy M-Audio device: running status on input results in a packet that has
418 * the data bytes but not the status byte and that is marked with CIN 4.
419 */
420static void snd_usbmidi_maudio_broken_running_status_input(
421 struct snd_usb_midi_in_endpoint *ep,
422 uint8_t *buffer, int buffer_length)
423{
424 int i;
425
426 for (i = 0; i + 3 < buffer_length; i += 4)
427 if (buffer[i] != 0) {
428 int cable = buffer[i] >> 4;
429 u8 cin = buffer[i] & 0x0f;
430 struct usbmidi_in_port *port = &ep->ports[cable];
431 int length;
432
433 length = snd_usbmidi_cin_length[cin];
434 if (cin == 0xf && buffer[i + 1] >= 0xf8)
435 ; /* realtime msg: no running status change */
436 else if (cin >= 0x8 && cin <= 0xe)
437 /* channel msg */
438 port->running_status_length = length - 1;
439 else if (cin == 0x4 &&
440 port->running_status_length != 0 &&
441 buffer[i + 1] < 0x80)
442 /* CIN 4 that is not a SysEx */
443 length = port->running_status_length;
444 else
445 /*
446 * All other msgs cannot begin running status.
447 * (A channel msg sent as two or three CIN 0xF
448 * packets could in theory, but this device
449 * doesn't use this format.)
450 */
451 port->running_status_length = 0;
452 snd_usbmidi_input_data(ep, cable, &buffer[i + 1],
453 length);
454 }
455}
456
457/*
458 * QinHeng CH345 is buggy: every second packet inside a SysEx has not CIN 4
459 * but the previously seen CIN, but still with three data bytes.
460 */
461static void ch345_broken_sysex_input(struct snd_usb_midi_in_endpoint *ep,
462 uint8_t *buffer, int buffer_length)
463{
464 unsigned int i, cin, length;
465
466 for (i = 0; i + 3 < buffer_length; i += 4) {
467 if (buffer[i] == 0 && i > 0)
468 break;
469 cin = buffer[i] & 0x0f;
470 if (ep->in_sysex &&
471 cin == ep->last_cin &&
472 (buffer[i + 1 + (cin == 0x6)] & 0x80) == 0)
473 cin = 0x4;
474#if 0
475 if (buffer[i + 1] == 0x90) {
476 /*
477 * Either a corrupted running status or a real note-on
478 * message; impossible to detect reliably.
479 */
480 }
481#endif
482 length = snd_usbmidi_cin_length[cin];
483 snd_usbmidi_input_data(ep, 0, &buffer[i + 1], length);
484 ep->in_sysex = cin == 0x4;
485 if (!ep->in_sysex)
486 ep->last_cin = cin;
487 }
488}
489
490/*
491 * CME protocol: like the standard protocol, but SysEx commands are sent as a
492 * single USB packet preceded by a 0x0F byte.
493 */
494static void snd_usbmidi_cme_input(struct snd_usb_midi_in_endpoint *ep,
495 uint8_t *buffer, int buffer_length)
496{
497 if (buffer_length < 2 || (buffer[0] & 0x0f) != 0x0f)
498 snd_usbmidi_standard_input(ep, buffer, buffer_length);
499 else
500 snd_usbmidi_input_data(ep, buffer[0] >> 4,
501 &buffer[1], buffer_length - 1);
502}
503
504/*
505 * Adds one USB MIDI packet to the output buffer.
506 */
507static void snd_usbmidi_output_standard_packet(struct urb *urb, uint8_t p0,
508 uint8_t p1, uint8_t p2,
509 uint8_t p3)
510{
511
512 uint8_t *buf =
513 (uint8_t *)urb->transfer_buffer + urb->transfer_buffer_length;
514 buf[0] = p0;
515 buf[1] = p1;
516 buf[2] = p2;
517 buf[3] = p3;
518 urb->transfer_buffer_length += 4;
519}
520
521/*
522 * Adds one Midiman packet to the output buffer.
523 */
524static void snd_usbmidi_output_midiman_packet(struct urb *urb, uint8_t p0,
525 uint8_t p1, uint8_t p2,
526 uint8_t p3)
527{
528
529 uint8_t *buf =
530 (uint8_t *)urb->transfer_buffer + urb->transfer_buffer_length;
531 buf[0] = p1;
532 buf[1] = p2;
533 buf[2] = p3;
534 buf[3] = (p0 & 0xf0) | snd_usbmidi_cin_length[p0 & 0x0f];
535 urb->transfer_buffer_length += 4;
536}
537
538/*
539 * Converts MIDI commands to USB MIDI packets.
540 */
541static void snd_usbmidi_transmit_byte(struct usbmidi_out_port *port,
542 uint8_t b, struct urb *urb)
543{
544 uint8_t p0 = port->cable;
545 void (*output_packet)(struct urb*, uint8_t, uint8_t, uint8_t, uint8_t) =
546 port->ep->umidi->usb_protocol_ops->output_packet;
547
548 if (b >= 0xf8) {
549 output_packet(urb, p0 | 0x0f, b, 0, 0);
550 } else if (b >= 0xf0) {
551 switch (b) {
552 case 0xf0:
553 port->data[0] = b;
554 port->state = STATE_SYSEX_1;
555 break;
556 case 0xf1:
557 case 0xf3:
558 port->data[0] = b;
559 port->state = STATE_1PARAM;
560 break;
561 case 0xf2:
562 port->data[0] = b;
563 port->state = STATE_2PARAM_1;
564 break;
565 case 0xf4:
566 case 0xf5:
567 port->state = STATE_UNKNOWN;
568 break;
569 case 0xf6:
570 output_packet(urb, p0 | 0x05, 0xf6, 0, 0);
571 port->state = STATE_UNKNOWN;
572 break;
573 case 0xf7:
574 switch (port->state) {
575 case STATE_SYSEX_0:
576 output_packet(urb, p0 | 0x05, 0xf7, 0, 0);
577 break;
578 case STATE_SYSEX_1:
579 output_packet(urb, p0 | 0x06, port->data[0],
580 0xf7, 0);
581 break;
582 case STATE_SYSEX_2:
583 output_packet(urb, p0 | 0x07, port->data[0],
584 port->data[1], 0xf7);
585 break;
586 }
587 port->state = STATE_UNKNOWN;
588 break;
589 }
590 } else if (b >= 0x80) {
591 port->data[0] = b;
592 if (b >= 0xc0 && b <= 0xdf)
593 port->state = STATE_1PARAM;
594 else
595 port->state = STATE_2PARAM_1;
596 } else { /* b < 0x80 */
597 switch (port->state) {
598 case STATE_1PARAM:
599 if (port->data[0] < 0xf0) {
600 p0 |= port->data[0] >> 4;
601 } else {
602 p0 |= 0x02;
603 port->state = STATE_UNKNOWN;
604 }
605 output_packet(urb, p0, port->data[0], b, 0);
606 break;
607 case STATE_2PARAM_1:
608 port->data[1] = b;
609 port->state = STATE_2PARAM_2;
610 break;
611 case STATE_2PARAM_2:
612 if (port->data[0] < 0xf0) {
613 p0 |= port->data[0] >> 4;
614 port->state = STATE_2PARAM_1;
615 } else {
616 p0 |= 0x03;
617 port->state = STATE_UNKNOWN;
618 }
619 output_packet(urb, p0, port->data[0], port->data[1], b);
620 break;
621 case STATE_SYSEX_0:
622 port->data[0] = b;
623 port->state = STATE_SYSEX_1;
624 break;
625 case STATE_SYSEX_1:
626 port->data[1] = b;
627 port->state = STATE_SYSEX_2;
628 break;
629 case STATE_SYSEX_2:
630 output_packet(urb, p0 | 0x04, port->data[0],
631 port->data[1], b);
632 port->state = STATE_SYSEX_0;
633 break;
634 }
635 }
636}
637
638static void snd_usbmidi_standard_output(struct snd_usb_midi_out_endpoint *ep,
639 struct urb *urb)
640{
641 int p;
642
643 /* FIXME: lower-numbered ports can starve higher-numbered ports */
644 for (p = 0; p < 0x10; ++p) {
645 struct usbmidi_out_port *port = &ep->ports[p];
646 if (!port->active)
647 continue;
648 while (urb->transfer_buffer_length + 3 < ep->max_transfer) {
649 uint8_t b;
650 if (snd_rawmidi_transmit(port->substream, &b, 1) != 1) {
651 port->active = 0;
652 break;
653 }
654 snd_usbmidi_transmit_byte(port, b, urb);
655 }
656 }
657}
658
659static const struct usb_protocol_ops snd_usbmidi_standard_ops = {
660 .input = snd_usbmidi_standard_input,
661 .output = snd_usbmidi_standard_output,
662 .output_packet = snd_usbmidi_output_standard_packet,
663};
664
665static const struct usb_protocol_ops snd_usbmidi_midiman_ops = {
666 .input = snd_usbmidi_midiman_input,
667 .output = snd_usbmidi_standard_output,
668 .output_packet = snd_usbmidi_output_midiman_packet,
669};
670
671static const
672struct usb_protocol_ops snd_usbmidi_maudio_broken_running_status_ops = {
673 .input = snd_usbmidi_maudio_broken_running_status_input,
674 .output = snd_usbmidi_standard_output,
675 .output_packet = snd_usbmidi_output_standard_packet,
676};
677
678static const struct usb_protocol_ops snd_usbmidi_cme_ops = {
679 .input = snd_usbmidi_cme_input,
680 .output = snd_usbmidi_standard_output,
681 .output_packet = snd_usbmidi_output_standard_packet,
682};
683
684static const struct usb_protocol_ops snd_usbmidi_ch345_broken_sysex_ops = {
685 .input = ch345_broken_sysex_input,
686 .output = snd_usbmidi_standard_output,
687 .output_packet = snd_usbmidi_output_standard_packet,
688};
689
690/*
691 * AKAI MPD16 protocol:
692 *
693 * For control port (endpoint 1):
694 * ==============================
695 * One or more chunks consisting of first byte of (0x10 | msg_len) and then a
696 * SysEx message (msg_len=9 bytes long).
697 *
698 * For data port (endpoint 2):
699 * ===========================
700 * One or more chunks consisting of first byte of (0x20 | msg_len) and then a
701 * MIDI message (msg_len bytes long)
702 *
703 * Messages sent: Active Sense, Note On, Poly Pressure, Control Change.
704 */
705static void snd_usbmidi_akai_input(struct snd_usb_midi_in_endpoint *ep,
706 uint8_t *buffer, int buffer_length)
707{
708 unsigned int pos = 0;
709 unsigned int len = (unsigned int)buffer_length;
710 while (pos < len) {
711 unsigned int port = (buffer[pos] >> 4) - 1;
712 unsigned int msg_len = buffer[pos] & 0x0f;
713 pos++;
714 if (pos + msg_len <= len && port < 2)
715 snd_usbmidi_input_data(ep, 0, &buffer[pos], msg_len);
716 pos += msg_len;
717 }
718}
719
720#define MAX_AKAI_SYSEX_LEN 9
721
722static void snd_usbmidi_akai_output(struct snd_usb_midi_out_endpoint *ep,
723 struct urb *urb)
724{
725 uint8_t *msg;
726 int pos, end, count, buf_end;
727 uint8_t tmp[MAX_AKAI_SYSEX_LEN];
728 struct snd_rawmidi_substream *substream = ep->ports[0].substream;
729
730 if (!ep->ports[0].active)
731 return;
732
733 msg = urb->transfer_buffer + urb->transfer_buffer_length;
734 buf_end = ep->max_transfer - MAX_AKAI_SYSEX_LEN - 1;
735
736 /* only try adding more data when there's space for at least 1 SysEx */
737 while (urb->transfer_buffer_length < buf_end) {
738 count = snd_rawmidi_transmit_peek(substream,
739 tmp, MAX_AKAI_SYSEX_LEN);
740 if (!count) {
741 ep->ports[0].active = 0;
742 return;
743 }
744 /* try to skip non-SysEx data */
745 for (pos = 0; pos < count && tmp[pos] != 0xF0; pos++)
746 ;
747
748 if (pos > 0) {
749 snd_rawmidi_transmit_ack(substream, pos);
750 continue;
751 }
752
753 /* look for the start or end marker */
754 for (end = 1; end < count && tmp[end] < 0xF0; end++)
755 ;
756
757 /* next SysEx started before the end of current one */
758 if (end < count && tmp[end] == 0xF0) {
759 /* it's incomplete - drop it */
760 snd_rawmidi_transmit_ack(substream, end);
761 continue;
762 }
763 /* SysEx complete */
764 if (end < count && tmp[end] == 0xF7) {
765 /* queue it, ack it, and get the next one */
766 count = end + 1;
767 msg[0] = 0x10 | count;
768 memcpy(&msg[1], tmp, count);
769 snd_rawmidi_transmit_ack(substream, count);
770 urb->transfer_buffer_length += count + 1;
771 msg += count + 1;
772 continue;
773 }
774 /* less than 9 bytes and no end byte - wait for more */
775 if (count < MAX_AKAI_SYSEX_LEN) {
776 ep->ports[0].active = 0;
777 return;
778 }
779 /* 9 bytes and no end marker in sight - malformed, skip it */
780 snd_rawmidi_transmit_ack(substream, count);
781 }
782}
783
784static const struct usb_protocol_ops snd_usbmidi_akai_ops = {
785 .input = snd_usbmidi_akai_input,
786 .output = snd_usbmidi_akai_output,
787};
788
789/*
790 * Novation USB MIDI protocol: number of data bytes is in the first byte
791 * (when receiving) (+1!) or in the second byte (when sending); data begins
792 * at the third byte.
793 */
794
795static void snd_usbmidi_novation_input(struct snd_usb_midi_in_endpoint *ep,
796 uint8_t *buffer, int buffer_length)
797{
798 if (buffer_length < 2 || !buffer[0] || buffer_length < buffer[0] + 1)
799 return;
800 snd_usbmidi_input_data(ep, 0, &buffer[2], buffer[0] - 1);
801}
802
803static void snd_usbmidi_novation_output(struct snd_usb_midi_out_endpoint *ep,
804 struct urb *urb)
805{
806 uint8_t *transfer_buffer;
807 int count;
808
809 if (!ep->ports[0].active)
810 return;
811 transfer_buffer = urb->transfer_buffer;
812 count = snd_rawmidi_transmit(ep->ports[0].substream,
813 &transfer_buffer[2],
814 ep->max_transfer - 2);
815 if (count < 1) {
816 ep->ports[0].active = 0;
817 return;
818 }
819 transfer_buffer[0] = 0;
820 transfer_buffer[1] = count;
821 urb->transfer_buffer_length = 2 + count;
822}
823
824static const struct usb_protocol_ops snd_usbmidi_novation_ops = {
825 .input = snd_usbmidi_novation_input,
826 .output = snd_usbmidi_novation_output,
827};
828
829/*
830 * "raw" protocol: just move raw MIDI bytes from/to the endpoint
831 */
832
833static void snd_usbmidi_raw_input(struct snd_usb_midi_in_endpoint *ep,
834 uint8_t *buffer, int buffer_length)
835{
836 snd_usbmidi_input_data(ep, 0, buffer, buffer_length);
837}
838
839static void snd_usbmidi_raw_output(struct snd_usb_midi_out_endpoint *ep,
840 struct urb *urb)
841{
842 int count;
843
844 if (!ep->ports[0].active)
845 return;
846 count = snd_rawmidi_transmit(ep->ports[0].substream,
847 urb->transfer_buffer,
848 ep->max_transfer);
849 if (count < 1) {
850 ep->ports[0].active = 0;
851 return;
852 }
853 urb->transfer_buffer_length = count;
854}
855
856static const struct usb_protocol_ops snd_usbmidi_raw_ops = {
857 .input = snd_usbmidi_raw_input,
858 .output = snd_usbmidi_raw_output,
859};
860
861/*
862 * FTDI protocol: raw MIDI bytes, but input packets have two modem status bytes.
863 */
864
865static void snd_usbmidi_ftdi_input(struct snd_usb_midi_in_endpoint *ep,
866 uint8_t *buffer, int buffer_length)
867{
868 if (buffer_length > 2)
869 snd_usbmidi_input_data(ep, 0, buffer + 2, buffer_length - 2);
870}
871
872static const struct usb_protocol_ops snd_usbmidi_ftdi_ops = {
873 .input = snd_usbmidi_ftdi_input,
874 .output = snd_usbmidi_raw_output,
875};
876
877static void snd_usbmidi_us122l_input(struct snd_usb_midi_in_endpoint *ep,
878 uint8_t *buffer, int buffer_length)
879{
880 if (buffer_length != 9)
881 return;
882 buffer_length = 8;
883 while (buffer_length && buffer[buffer_length - 1] == 0xFD)
884 buffer_length--;
885 if (buffer_length)
886 snd_usbmidi_input_data(ep, 0, buffer, buffer_length);
887}
888
889static void snd_usbmidi_us122l_output(struct snd_usb_midi_out_endpoint *ep,
890 struct urb *urb)
891{
892 int count;
893
894 if (!ep->ports[0].active)
895 return;
896 switch (snd_usb_get_speed(ep->umidi->dev)) {
897 case USB_SPEED_HIGH:
898 case USB_SPEED_SUPER:
899 case USB_SPEED_SUPER_PLUS:
900 count = 1;
901 break;
902 default:
903 count = 2;
904 }
905 count = snd_rawmidi_transmit(ep->ports[0].substream,
906 urb->transfer_buffer,
907 count);
908 if (count < 1) {
909 ep->ports[0].active = 0;
910 return;
911 }
912
913 memset(urb->transfer_buffer + count, 0xFD, ep->max_transfer - count);
914 urb->transfer_buffer_length = ep->max_transfer;
915}
916
917static const struct usb_protocol_ops snd_usbmidi_122l_ops = {
918 .input = snd_usbmidi_us122l_input,
919 .output = snd_usbmidi_us122l_output,
920};
921
922/*
923 * Emagic USB MIDI protocol: raw MIDI with "F5 xx" port switching.
924 */
925
926static void snd_usbmidi_emagic_init_out(struct snd_usb_midi_out_endpoint *ep)
927{
928 static const u8 init_data[] = {
929 /* initialization magic: "get version" */
930 0xf0,
931 0x00, 0x20, 0x31, /* Emagic */
932 0x64, /* Unitor8 */
933 0x0b, /* version number request */
934 0x00, /* command version */
935 0x00, /* EEPROM, box 0 */
936 0xf7
937 };
938 send_bulk_static_data(ep, init_data, sizeof(init_data));
939 /* while we're at it, pour on more magic */
940 send_bulk_static_data(ep, init_data, sizeof(init_data));
941}
942
943static void snd_usbmidi_emagic_finish_out(struct snd_usb_midi_out_endpoint *ep)
944{
945 static const u8 finish_data[] = {
946 /* switch to patch mode with last preset */
947 0xf0,
948 0x00, 0x20, 0x31, /* Emagic */
949 0x64, /* Unitor8 */
950 0x10, /* patch switch command */
951 0x00, /* command version */
952 0x7f, /* to all boxes */
953 0x40, /* last preset in EEPROM */
954 0xf7
955 };
956 send_bulk_static_data(ep, finish_data, sizeof(finish_data));
957}
958
959static void snd_usbmidi_emagic_input(struct snd_usb_midi_in_endpoint *ep,
960 uint8_t *buffer, int buffer_length)
961{
962 int i;
963
964 /* FF indicates end of valid data */
965 for (i = 0; i < buffer_length; ++i)
966 if (buffer[i] == 0xff) {
967 buffer_length = i;
968 break;
969 }
970
971 /* handle F5 at end of last buffer */
972 if (ep->seen_f5)
973 goto switch_port;
974
975 while (buffer_length > 0) {
976 /* determine size of data until next F5 */
977 for (i = 0; i < buffer_length; ++i)
978 if (buffer[i] == 0xf5)
979 break;
980 snd_usbmidi_input_data(ep, ep->current_port, buffer, i);
981 buffer += i;
982 buffer_length -= i;
983
984 if (buffer_length <= 0)
985 break;
986 /* assert(buffer[0] == 0xf5); */
987 ep->seen_f5 = 1;
988 ++buffer;
989 --buffer_length;
990
991 switch_port:
992 if (buffer_length <= 0)
993 break;
994 if (buffer[0] < 0x80) {
995 ep->current_port = (buffer[0] - 1) & 15;
996 ++buffer;
997 --buffer_length;
998 }
999 ep->seen_f5 = 0;
1000 }
1001}
1002
1003static void snd_usbmidi_emagic_output(struct snd_usb_midi_out_endpoint *ep,
1004 struct urb *urb)
1005{
1006 int port0 = ep->current_port;
1007 uint8_t *buf = urb->transfer_buffer;
1008 int buf_free = ep->max_transfer;
1009 int length, i;
1010
1011 for (i = 0; i < 0x10; ++i) {
1012 /* round-robin, starting at the last current port */
1013 int portnum = (port0 + i) & 15;
1014 struct usbmidi_out_port *port = &ep->ports[portnum];
1015
1016 if (!port->active)
1017 continue;
1018 if (snd_rawmidi_transmit_peek(port->substream, buf, 1) != 1) {
1019 port->active = 0;
1020 continue;
1021 }
1022
1023 if (portnum != ep->current_port) {
1024 if (buf_free < 2)
1025 break;
1026 ep->current_port = portnum;
1027 buf[0] = 0xf5;
1028 buf[1] = (portnum + 1) & 15;
1029 buf += 2;
1030 buf_free -= 2;
1031 }
1032
1033 if (buf_free < 1)
1034 break;
1035 length = snd_rawmidi_transmit(port->substream, buf, buf_free);
1036 if (length > 0) {
1037 buf += length;
1038 buf_free -= length;
1039 if (buf_free < 1)
1040 break;
1041 }
1042 }
1043 if (buf_free < ep->max_transfer && buf_free > 0) {
1044 *buf = 0xff;
1045 --buf_free;
1046 }
1047 urb->transfer_buffer_length = ep->max_transfer - buf_free;
1048}
1049
1050static const struct usb_protocol_ops snd_usbmidi_emagic_ops = {
1051 .input = snd_usbmidi_emagic_input,
1052 .output = snd_usbmidi_emagic_output,
1053 .init_out_endpoint = snd_usbmidi_emagic_init_out,
1054 .finish_out_endpoint = snd_usbmidi_emagic_finish_out,
1055};
1056
1057
1058static void update_roland_altsetting(struct snd_usb_midi *umidi)
1059{
1060 struct usb_interface *intf;
1061 struct usb_host_interface *hostif;
1062 struct usb_interface_descriptor *intfd;
1063 int is_light_load;
1064
1065 intf = umidi->iface;
1066 is_light_load = intf->cur_altsetting != intf->altsetting;
1067 if (umidi->roland_load_ctl->private_value == is_light_load)
1068 return;
1069 hostif = &intf->altsetting[umidi->roland_load_ctl->private_value];
1070 intfd = get_iface_desc(hostif);
1071 snd_usbmidi_input_stop(&umidi->list);
1072 usb_set_interface(umidi->dev, intfd->bInterfaceNumber,
1073 intfd->bAlternateSetting);
1074 snd_usbmidi_input_start(&umidi->list);
1075}
1076
1077static int substream_open(struct snd_rawmidi_substream *substream, int dir,
1078 int open)
1079{
1080 struct snd_usb_midi *umidi = substream->rmidi->private_data;
1081 struct snd_kcontrol *ctl;
1082
1083 down_read(&umidi->disc_rwsem);
1084 if (umidi->disconnected) {
1085 up_read(&umidi->disc_rwsem);
1086 return open ? -ENODEV : 0;
1087 }
1088
1089 mutex_lock(&umidi->mutex);
1090 if (open) {
1091 if (!umidi->opened[0] && !umidi->opened[1]) {
1092 if (umidi->roland_load_ctl) {
1093 ctl = umidi->roland_load_ctl;
1094 ctl->vd[0].access |=
1095 SNDRV_CTL_ELEM_ACCESS_INACTIVE;
1096 snd_ctl_notify(umidi->card,
1097 SNDRV_CTL_EVENT_MASK_INFO, &ctl->id);
1098 update_roland_altsetting(umidi);
1099 }
1100 }
1101 umidi->opened[dir]++;
1102 if (umidi->opened[1])
1103 snd_usbmidi_input_start(&umidi->list);
1104 } else {
1105 umidi->opened[dir]--;
1106 if (!umidi->opened[1])
1107 snd_usbmidi_input_stop(&umidi->list);
1108 if (!umidi->opened[0] && !umidi->opened[1]) {
1109 if (umidi->roland_load_ctl) {
1110 ctl = umidi->roland_load_ctl;
1111 ctl->vd[0].access &=
1112 ~SNDRV_CTL_ELEM_ACCESS_INACTIVE;
1113 snd_ctl_notify(umidi->card,
1114 SNDRV_CTL_EVENT_MASK_INFO, &ctl->id);
1115 }
1116 }
1117 }
1118 mutex_unlock(&umidi->mutex);
1119 up_read(&umidi->disc_rwsem);
1120 return 0;
1121}
1122
1123static int snd_usbmidi_output_open(struct snd_rawmidi_substream *substream)
1124{
1125 struct snd_usb_midi *umidi = substream->rmidi->private_data;
1126 struct usbmidi_out_port *port = NULL;
1127 int i, j;
1128
1129 for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i)
1130 if (umidi->endpoints[i].out)
1131 for (j = 0; j < 0x10; ++j)
1132 if (umidi->endpoints[i].out->ports[j].substream == substream) {
1133 port = &umidi->endpoints[i].out->ports[j];
1134 break;
1135 }
1136 if (!port)
1137 return -ENXIO;
1138
1139 substream->runtime->private_data = port;
1140 port->state = STATE_UNKNOWN;
1141 return substream_open(substream, 0, 1);
1142}
1143
1144static int snd_usbmidi_output_close(struct snd_rawmidi_substream *substream)
1145{
1146 struct usbmidi_out_port *port = substream->runtime->private_data;
1147
1148 cancel_work_sync(&port->ep->work);
1149 return substream_open(substream, 0, 0);
1150}
1151
1152static void snd_usbmidi_output_trigger(struct snd_rawmidi_substream *substream,
1153 int up)
1154{
1155 struct usbmidi_out_port *port =
1156 (struct usbmidi_out_port *)substream->runtime->private_data;
1157
1158 port->active = up;
1159 if (up) {
1160 if (port->ep->umidi->disconnected) {
1161 /* gobble up remaining bytes to prevent wait in
1162 * snd_rawmidi_drain_output */
1163 snd_rawmidi_proceed(substream);
1164 return;
1165 }
1166 queue_work(system_highpri_wq, &port->ep->work);
1167 }
1168}
1169
1170static void snd_usbmidi_output_drain(struct snd_rawmidi_substream *substream)
1171{
1172 struct usbmidi_out_port *port = substream->runtime->private_data;
1173 struct snd_usb_midi_out_endpoint *ep = port->ep;
1174 unsigned int drain_urbs;
1175 DEFINE_WAIT(wait);
1176 long timeout = msecs_to_jiffies(50);
1177
1178 if (ep->umidi->disconnected)
1179 return;
1180 /*
1181 * The substream buffer is empty, but some data might still be in the
1182 * currently active URBs, so we have to wait for those to complete.
1183 */
1184 spin_lock_irq(&ep->buffer_lock);
1185 drain_urbs = ep->active_urbs;
1186 if (drain_urbs) {
1187 ep->drain_urbs |= drain_urbs;
1188 do {
1189 prepare_to_wait(&ep->drain_wait, &wait,
1190 TASK_UNINTERRUPTIBLE);
1191 spin_unlock_irq(&ep->buffer_lock);
1192 timeout = schedule_timeout(timeout);
1193 spin_lock_irq(&ep->buffer_lock);
1194 drain_urbs &= ep->drain_urbs;
1195 } while (drain_urbs && timeout);
1196 finish_wait(&ep->drain_wait, &wait);
1197 }
1198 port->active = 0;
1199 spin_unlock_irq(&ep->buffer_lock);
1200}
1201
1202static int snd_usbmidi_input_open(struct snd_rawmidi_substream *substream)
1203{
1204 return substream_open(substream, 1, 1);
1205}
1206
1207static int snd_usbmidi_input_close(struct snd_rawmidi_substream *substream)
1208{
1209 return substream_open(substream, 1, 0);
1210}
1211
1212static void snd_usbmidi_input_trigger(struct snd_rawmidi_substream *substream,
1213 int up)
1214{
1215 struct snd_usb_midi *umidi = substream->rmidi->private_data;
1216
1217 if (up)
1218 set_bit(substream->number, &umidi->input_triggered);
1219 else
1220 clear_bit(substream->number, &umidi->input_triggered);
1221}
1222
1223static const struct snd_rawmidi_ops snd_usbmidi_output_ops = {
1224 .open = snd_usbmidi_output_open,
1225 .close = snd_usbmidi_output_close,
1226 .trigger = snd_usbmidi_output_trigger,
1227 .drain = snd_usbmidi_output_drain,
1228};
1229
1230static const struct snd_rawmidi_ops snd_usbmidi_input_ops = {
1231 .open = snd_usbmidi_input_open,
1232 .close = snd_usbmidi_input_close,
1233 .trigger = snd_usbmidi_input_trigger
1234};
1235
1236static void free_urb_and_buffer(struct snd_usb_midi *umidi, struct urb *urb,
1237 unsigned int buffer_length)
1238{
1239 usb_free_coherent(umidi->dev, buffer_length,
1240 urb->transfer_buffer, urb->transfer_dma);
1241 usb_free_urb(urb);
1242}
1243
1244/*
1245 * Frees an input endpoint.
1246 * May be called when ep hasn't been initialized completely.
1247 */
1248static void snd_usbmidi_in_endpoint_delete(struct snd_usb_midi_in_endpoint *ep)
1249{
1250 unsigned int i;
1251
1252 for (i = 0; i < INPUT_URBS; ++i)
1253 if (ep->urbs[i])
1254 free_urb_and_buffer(ep->umidi, ep->urbs[i],
1255 ep->urbs[i]->transfer_buffer_length);
1256 kfree(ep);
1257}
1258
1259/*
1260 * Creates an input endpoint.
1261 */
1262static int snd_usbmidi_in_endpoint_create(struct snd_usb_midi *umidi,
1263 struct snd_usb_midi_endpoint_info *ep_info,
1264 struct snd_usb_midi_endpoint *rep)
1265{
1266 struct snd_usb_midi_in_endpoint *ep;
1267 void *buffer;
1268 unsigned int pipe;
1269 int length;
1270 unsigned int i;
1271 int err;
1272
1273 rep->in = NULL;
1274 ep = kzalloc(sizeof(*ep), GFP_KERNEL);
1275 if (!ep)
1276 return -ENOMEM;
1277 ep->umidi = umidi;
1278
1279 for (i = 0; i < INPUT_URBS; ++i) {
1280 ep->urbs[i] = usb_alloc_urb(0, GFP_KERNEL);
1281 if (!ep->urbs[i]) {
1282 err = -ENOMEM;
1283 goto error;
1284 }
1285 }
1286 if (ep_info->in_interval)
1287 pipe = usb_rcvintpipe(umidi->dev, ep_info->in_ep);
1288 else
1289 pipe = usb_rcvbulkpipe(umidi->dev, ep_info->in_ep);
1290 length = usb_maxpacket(umidi->dev, pipe);
1291 for (i = 0; i < INPUT_URBS; ++i) {
1292 buffer = usb_alloc_coherent(umidi->dev, length, GFP_KERNEL,
1293 &ep->urbs[i]->transfer_dma);
1294 if (!buffer) {
1295 err = -ENOMEM;
1296 goto error;
1297 }
1298 if (ep_info->in_interval)
1299 usb_fill_int_urb(ep->urbs[i], umidi->dev,
1300 pipe, buffer, length,
1301 snd_usbmidi_in_urb_complete,
1302 ep, ep_info->in_interval);
1303 else
1304 usb_fill_bulk_urb(ep->urbs[i], umidi->dev,
1305 pipe, buffer, length,
1306 snd_usbmidi_in_urb_complete, ep);
1307 ep->urbs[i]->transfer_flags = URB_NO_TRANSFER_DMA_MAP;
1308 err = usb_urb_ep_type_check(ep->urbs[i]);
1309 if (err < 0) {
1310 dev_err(&umidi->dev->dev, "invalid MIDI in EP %x\n",
1311 ep_info->in_ep);
1312 goto error;
1313 }
1314 }
1315
1316 rep->in = ep;
1317 return 0;
1318
1319 error:
1320 snd_usbmidi_in_endpoint_delete(ep);
1321 return err;
1322}
1323
1324/*
1325 * Frees an output endpoint.
1326 * May be called when ep hasn't been initialized completely.
1327 */
1328static void snd_usbmidi_out_endpoint_clear(struct snd_usb_midi_out_endpoint *ep)
1329{
1330 unsigned int i;
1331
1332 for (i = 0; i < OUTPUT_URBS; ++i)
1333 if (ep->urbs[i].urb) {
1334 free_urb_and_buffer(ep->umidi, ep->urbs[i].urb,
1335 ep->max_transfer);
1336 ep->urbs[i].urb = NULL;
1337 }
1338}
1339
1340static void snd_usbmidi_out_endpoint_delete(struct snd_usb_midi_out_endpoint *ep)
1341{
1342 snd_usbmidi_out_endpoint_clear(ep);
1343 kfree(ep);
1344}
1345
1346/*
1347 * Creates an output endpoint, and initializes output ports.
1348 */
1349static int snd_usbmidi_out_endpoint_create(struct snd_usb_midi *umidi,
1350 struct snd_usb_midi_endpoint_info *ep_info,
1351 struct snd_usb_midi_endpoint *rep)
1352{
1353 struct snd_usb_midi_out_endpoint *ep;
1354 unsigned int i;
1355 unsigned int pipe;
1356 void *buffer;
1357 int err;
1358
1359 rep->out = NULL;
1360 ep = kzalloc(sizeof(*ep), GFP_KERNEL);
1361 if (!ep)
1362 return -ENOMEM;
1363 ep->umidi = umidi;
1364
1365 for (i = 0; i < OUTPUT_URBS; ++i) {
1366 ep->urbs[i].urb = usb_alloc_urb(0, GFP_KERNEL);
1367 if (!ep->urbs[i].urb) {
1368 err = -ENOMEM;
1369 goto error;
1370 }
1371 ep->urbs[i].ep = ep;
1372 }
1373 if (ep_info->out_interval)
1374 pipe = usb_sndintpipe(umidi->dev, ep_info->out_ep);
1375 else
1376 pipe = usb_sndbulkpipe(umidi->dev, ep_info->out_ep);
1377 switch (umidi->usb_id) {
1378 default:
1379 ep->max_transfer = usb_maxpacket(umidi->dev, pipe);
1380 break;
1381 /*
1382 * Various chips declare a packet size larger than 4 bytes, but
1383 * do not actually work with larger packets:
1384 */
1385 case USB_ID(0x0a67, 0x5011): /* Medeli DD305 */
1386 case USB_ID(0x0a92, 0x1020): /* ESI M4U */
1387 case USB_ID(0x1430, 0x474b): /* RedOctane GH MIDI INTERFACE */
1388 case USB_ID(0x15ca, 0x0101): /* Textech USB Midi Cable */
1389 case USB_ID(0x15ca, 0x1806): /* Textech USB Midi Cable */
1390 case USB_ID(0x1a86, 0x752d): /* QinHeng CH345 "USB2.0-MIDI" */
1391 case USB_ID(0xfc08, 0x0101): /* Unknown vendor Cable */
1392 ep->max_transfer = 4;
1393 break;
1394 /*
1395 * Some devices only work with 9 bytes packet size:
1396 */
1397 case USB_ID(0x0644, 0x800e): /* Tascam US-122L */
1398 case USB_ID(0x0644, 0x800f): /* Tascam US-144 */
1399 ep->max_transfer = 9;
1400 break;
1401 }
1402 for (i = 0; i < OUTPUT_URBS; ++i) {
1403 buffer = usb_alloc_coherent(umidi->dev,
1404 ep->max_transfer, GFP_KERNEL,
1405 &ep->urbs[i].urb->transfer_dma);
1406 if (!buffer) {
1407 err = -ENOMEM;
1408 goto error;
1409 }
1410 if (ep_info->out_interval)
1411 usb_fill_int_urb(ep->urbs[i].urb, umidi->dev,
1412 pipe, buffer, ep->max_transfer,
1413 snd_usbmidi_out_urb_complete,
1414 &ep->urbs[i], ep_info->out_interval);
1415 else
1416 usb_fill_bulk_urb(ep->urbs[i].urb, umidi->dev,
1417 pipe, buffer, ep->max_transfer,
1418 snd_usbmidi_out_urb_complete,
1419 &ep->urbs[i]);
1420 err = usb_urb_ep_type_check(ep->urbs[i].urb);
1421 if (err < 0) {
1422 dev_err(&umidi->dev->dev, "invalid MIDI out EP %x\n",
1423 ep_info->out_ep);
1424 goto error;
1425 }
1426 ep->urbs[i].urb->transfer_flags = URB_NO_TRANSFER_DMA_MAP;
1427 }
1428
1429 spin_lock_init(&ep->buffer_lock);
1430 INIT_WORK(&ep->work, snd_usbmidi_out_work);
1431 init_waitqueue_head(&ep->drain_wait);
1432
1433 for (i = 0; i < 0x10; ++i)
1434 if (ep_info->out_cables & (1 << i)) {
1435 ep->ports[i].ep = ep;
1436 ep->ports[i].cable = i << 4;
1437 }
1438
1439 if (umidi->usb_protocol_ops->init_out_endpoint)
1440 umidi->usb_protocol_ops->init_out_endpoint(ep);
1441
1442 rep->out = ep;
1443 return 0;
1444
1445 error:
1446 snd_usbmidi_out_endpoint_delete(ep);
1447 return err;
1448}
1449
1450/*
1451 * Frees everything.
1452 */
1453static void snd_usbmidi_free(struct snd_usb_midi *umidi)
1454{
1455 int i;
1456
1457 for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i) {
1458 struct snd_usb_midi_endpoint *ep = &umidi->endpoints[i];
1459 if (ep->out)
1460 snd_usbmidi_out_endpoint_delete(ep->out);
1461 if (ep->in)
1462 snd_usbmidi_in_endpoint_delete(ep->in);
1463 }
1464 mutex_destroy(&umidi->mutex);
1465 kfree(umidi);
1466}
1467
1468/*
1469 * Unlinks all URBs (must be done before the usb_device is deleted).
1470 */
1471void snd_usbmidi_disconnect(struct list_head *p)
1472{
1473 struct snd_usb_midi *umidi;
1474 unsigned int i, j;
1475
1476 umidi = list_entry(p, struct snd_usb_midi, list);
1477 /*
1478 * an URB's completion handler may start the timer and
1479 * a timer may submit an URB. To reliably break the cycle
1480 * a flag under lock must be used
1481 */
1482 down_write(&umidi->disc_rwsem);
1483 spin_lock_irq(&umidi->disc_lock);
1484 umidi->disconnected = 1;
1485 spin_unlock_irq(&umidi->disc_lock);
1486 up_write(&umidi->disc_rwsem);
1487
1488 del_timer_sync(&umidi->error_timer);
1489
1490 for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i) {
1491 struct snd_usb_midi_endpoint *ep = &umidi->endpoints[i];
1492 if (ep->out)
1493 cancel_work_sync(&ep->out->work);
1494 if (ep->out) {
1495 for (j = 0; j < OUTPUT_URBS; ++j)
1496 usb_kill_urb(ep->out->urbs[j].urb);
1497 if (umidi->usb_protocol_ops->finish_out_endpoint)
1498 umidi->usb_protocol_ops->finish_out_endpoint(ep->out);
1499 ep->out->active_urbs = 0;
1500 if (ep->out->drain_urbs) {
1501 ep->out->drain_urbs = 0;
1502 wake_up(&ep->out->drain_wait);
1503 }
1504 }
1505 if (ep->in)
1506 for (j = 0; j < INPUT_URBS; ++j)
1507 usb_kill_urb(ep->in->urbs[j]);
1508 /* free endpoints here; later call can result in Oops */
1509 if (ep->out)
1510 snd_usbmidi_out_endpoint_clear(ep->out);
1511 if (ep->in) {
1512 snd_usbmidi_in_endpoint_delete(ep->in);
1513 ep->in = NULL;
1514 }
1515 }
1516}
1517EXPORT_SYMBOL(snd_usbmidi_disconnect);
1518
1519static void snd_usbmidi_rawmidi_free(struct snd_rawmidi *rmidi)
1520{
1521 struct snd_usb_midi *umidi = rmidi->private_data;
1522 snd_usbmidi_free(umidi);
1523}
1524
1525static struct snd_rawmidi_substream *snd_usbmidi_find_substream(struct snd_usb_midi *umidi,
1526 int stream,
1527 int number)
1528{
1529 struct snd_rawmidi_substream *substream;
1530
1531 list_for_each_entry(substream, &umidi->rmidi->streams[stream].substreams,
1532 list) {
1533 if (substream->number == number)
1534 return substream;
1535 }
1536 return NULL;
1537}
1538
1539/*
1540 * This list specifies names for ports that do not fit into the standard
1541 * "(product) MIDI (n)" schema because they aren't external MIDI ports,
1542 * such as internal control or synthesizer ports.
1543 */
1544static struct port_info {
1545 u32 id;
1546 short int port;
1547 short int voices;
1548 const char *name;
1549 unsigned int seq_flags;
1550} snd_usbmidi_port_info[] = {
1551#define PORT_INFO(vendor, product, num, name_, voices_, flags) \
1552 { .id = USB_ID(vendor, product), \
1553 .port = num, .voices = voices_, \
1554 .name = name_, .seq_flags = flags }
1555#define EXTERNAL_PORT(vendor, product, num, name) \
1556 PORT_INFO(vendor, product, num, name, 0, \
1557 SNDRV_SEQ_PORT_TYPE_MIDI_GENERIC | \
1558 SNDRV_SEQ_PORT_TYPE_HARDWARE | \
1559 SNDRV_SEQ_PORT_TYPE_PORT)
1560#define CONTROL_PORT(vendor, product, num, name) \
1561 PORT_INFO(vendor, product, num, name, 0, \
1562 SNDRV_SEQ_PORT_TYPE_MIDI_GENERIC | \
1563 SNDRV_SEQ_PORT_TYPE_HARDWARE)
1564#define GM_SYNTH_PORT(vendor, product, num, name, voices) \
1565 PORT_INFO(vendor, product, num, name, voices, \
1566 SNDRV_SEQ_PORT_TYPE_MIDI_GENERIC | \
1567 SNDRV_SEQ_PORT_TYPE_MIDI_GM | \
1568 SNDRV_SEQ_PORT_TYPE_HARDWARE | \
1569 SNDRV_SEQ_PORT_TYPE_SYNTHESIZER)
1570#define ROLAND_SYNTH_PORT(vendor, product, num, name, voices) \
1571 PORT_INFO(vendor, product, num, name, voices, \
1572 SNDRV_SEQ_PORT_TYPE_MIDI_GENERIC | \
1573 SNDRV_SEQ_PORT_TYPE_MIDI_GM | \
1574 SNDRV_SEQ_PORT_TYPE_MIDI_GM2 | \
1575 SNDRV_SEQ_PORT_TYPE_MIDI_GS | \
1576 SNDRV_SEQ_PORT_TYPE_MIDI_XG | \
1577 SNDRV_SEQ_PORT_TYPE_HARDWARE | \
1578 SNDRV_SEQ_PORT_TYPE_SYNTHESIZER)
1579#define SOUNDCANVAS_PORT(vendor, product, num, name, voices) \
1580 PORT_INFO(vendor, product, num, name, voices, \
1581 SNDRV_SEQ_PORT_TYPE_MIDI_GENERIC | \
1582 SNDRV_SEQ_PORT_TYPE_MIDI_GM | \
1583 SNDRV_SEQ_PORT_TYPE_MIDI_GM2 | \
1584 SNDRV_SEQ_PORT_TYPE_MIDI_GS | \
1585 SNDRV_SEQ_PORT_TYPE_MIDI_XG | \
1586 SNDRV_SEQ_PORT_TYPE_MIDI_MT32 | \
1587 SNDRV_SEQ_PORT_TYPE_HARDWARE | \
1588 SNDRV_SEQ_PORT_TYPE_SYNTHESIZER)
1589 /* Yamaha MOTIF XF */
1590 GM_SYNTH_PORT(0x0499, 0x105c, 0, "%s Tone Generator", 128),
1591 CONTROL_PORT(0x0499, 0x105c, 1, "%s Remote Control"),
1592 EXTERNAL_PORT(0x0499, 0x105c, 2, "%s Thru"),
1593 CONTROL_PORT(0x0499, 0x105c, 3, "%s Editor"),
1594 /* Roland UA-100 */
1595 CONTROL_PORT(0x0582, 0x0000, 2, "%s Control"),
1596 /* Roland SC-8850 */
1597 SOUNDCANVAS_PORT(0x0582, 0x0003, 0, "%s Part A", 128),
1598 SOUNDCANVAS_PORT(0x0582, 0x0003, 1, "%s Part B", 128),
1599 SOUNDCANVAS_PORT(0x0582, 0x0003, 2, "%s Part C", 128),
1600 SOUNDCANVAS_PORT(0x0582, 0x0003, 3, "%s Part D", 128),
1601 EXTERNAL_PORT(0x0582, 0x0003, 4, "%s MIDI 1"),
1602 EXTERNAL_PORT(0x0582, 0x0003, 5, "%s MIDI 2"),
1603 /* Roland U-8 */
1604 EXTERNAL_PORT(0x0582, 0x0004, 0, "%s MIDI"),
1605 CONTROL_PORT(0x0582, 0x0004, 1, "%s Control"),
1606 /* Roland SC-8820 */
1607 SOUNDCANVAS_PORT(0x0582, 0x0007, 0, "%s Part A", 64),
1608 SOUNDCANVAS_PORT(0x0582, 0x0007, 1, "%s Part B", 64),
1609 EXTERNAL_PORT(0x0582, 0x0007, 2, "%s MIDI"),
1610 /* Roland SK-500 */
1611 SOUNDCANVAS_PORT(0x0582, 0x000b, 0, "%s Part A", 64),
1612 SOUNDCANVAS_PORT(0x0582, 0x000b, 1, "%s Part B", 64),
1613 EXTERNAL_PORT(0x0582, 0x000b, 2, "%s MIDI"),
1614 /* Roland SC-D70 */
1615 SOUNDCANVAS_PORT(0x0582, 0x000c, 0, "%s Part A", 64),
1616 SOUNDCANVAS_PORT(0x0582, 0x000c, 1, "%s Part B", 64),
1617 EXTERNAL_PORT(0x0582, 0x000c, 2, "%s MIDI"),
1618 /* Edirol UM-880 */
1619 CONTROL_PORT(0x0582, 0x0014, 8, "%s Control"),
1620 /* Edirol SD-90 */
1621 ROLAND_SYNTH_PORT(0x0582, 0x0016, 0, "%s Part A", 128),
1622 ROLAND_SYNTH_PORT(0x0582, 0x0016, 1, "%s Part B", 128),
1623 EXTERNAL_PORT(0x0582, 0x0016, 2, "%s MIDI 1"),
1624 EXTERNAL_PORT(0x0582, 0x0016, 3, "%s MIDI 2"),
1625 /* Edirol UM-550 */
1626 CONTROL_PORT(0x0582, 0x0023, 5, "%s Control"),
1627 /* Edirol SD-20 */
1628 ROLAND_SYNTH_PORT(0x0582, 0x0027, 0, "%s Part A", 64),
1629 ROLAND_SYNTH_PORT(0x0582, 0x0027, 1, "%s Part B", 64),
1630 EXTERNAL_PORT(0x0582, 0x0027, 2, "%s MIDI"),
1631 /* Edirol SD-80 */
1632 ROLAND_SYNTH_PORT(0x0582, 0x0029, 0, "%s Part A", 128),
1633 ROLAND_SYNTH_PORT(0x0582, 0x0029, 1, "%s Part B", 128),
1634 EXTERNAL_PORT(0x0582, 0x0029, 2, "%s MIDI 1"),
1635 EXTERNAL_PORT(0x0582, 0x0029, 3, "%s MIDI 2"),
1636 /* Edirol UA-700 */
1637 EXTERNAL_PORT(0x0582, 0x002b, 0, "%s MIDI"),
1638 CONTROL_PORT(0x0582, 0x002b, 1, "%s Control"),
1639 /* Roland VariOS */
1640 EXTERNAL_PORT(0x0582, 0x002f, 0, "%s MIDI"),
1641 EXTERNAL_PORT(0x0582, 0x002f, 1, "%s External MIDI"),
1642 EXTERNAL_PORT(0x0582, 0x002f, 2, "%s Sync"),
1643 /* Edirol PCR */
1644 EXTERNAL_PORT(0x0582, 0x0033, 0, "%s MIDI"),
1645 EXTERNAL_PORT(0x0582, 0x0033, 1, "%s 1"),
1646 EXTERNAL_PORT(0x0582, 0x0033, 2, "%s 2"),
1647 /* BOSS GS-10 */
1648 EXTERNAL_PORT(0x0582, 0x003b, 0, "%s MIDI"),
1649 CONTROL_PORT(0x0582, 0x003b, 1, "%s Control"),
1650 /* Edirol UA-1000 */
1651 EXTERNAL_PORT(0x0582, 0x0044, 0, "%s MIDI"),
1652 CONTROL_PORT(0x0582, 0x0044, 1, "%s Control"),
1653 /* Edirol UR-80 */
1654 EXTERNAL_PORT(0x0582, 0x0048, 0, "%s MIDI"),
1655 EXTERNAL_PORT(0x0582, 0x0048, 1, "%s 1"),
1656 EXTERNAL_PORT(0x0582, 0x0048, 2, "%s 2"),
1657 /* Edirol PCR-A */
1658 EXTERNAL_PORT(0x0582, 0x004d, 0, "%s MIDI"),
1659 EXTERNAL_PORT(0x0582, 0x004d, 1, "%s 1"),
1660 EXTERNAL_PORT(0x0582, 0x004d, 2, "%s 2"),
1661 /* BOSS GT-PRO */
1662 CONTROL_PORT(0x0582, 0x0089, 0, "%s Control"),
1663 /* Edirol UM-3EX */
1664 CONTROL_PORT(0x0582, 0x009a, 3, "%s Control"),
1665 /* Roland VG-99 */
1666 CONTROL_PORT(0x0582, 0x00b2, 0, "%s Control"),
1667 EXTERNAL_PORT(0x0582, 0x00b2, 1, "%s MIDI"),
1668 /* Cakewalk Sonar V-Studio 100 */
1669 EXTERNAL_PORT(0x0582, 0x00eb, 0, "%s MIDI"),
1670 CONTROL_PORT(0x0582, 0x00eb, 1, "%s Control"),
1671 /* Roland VB-99 */
1672 CONTROL_PORT(0x0582, 0x0102, 0, "%s Control"),
1673 EXTERNAL_PORT(0x0582, 0x0102, 1, "%s MIDI"),
1674 /* Roland A-PRO */
1675 EXTERNAL_PORT(0x0582, 0x010f, 0, "%s MIDI"),
1676 CONTROL_PORT(0x0582, 0x010f, 1, "%s 1"),
1677 CONTROL_PORT(0x0582, 0x010f, 2, "%s 2"),
1678 /* Roland SD-50 */
1679 ROLAND_SYNTH_PORT(0x0582, 0x0114, 0, "%s Synth", 128),
1680 EXTERNAL_PORT(0x0582, 0x0114, 1, "%s MIDI"),
1681 CONTROL_PORT(0x0582, 0x0114, 2, "%s Control"),
1682 /* Roland OCTA-CAPTURE */
1683 EXTERNAL_PORT(0x0582, 0x0120, 0, "%s MIDI"),
1684 CONTROL_PORT(0x0582, 0x0120, 1, "%s Control"),
1685 EXTERNAL_PORT(0x0582, 0x0121, 0, "%s MIDI"),
1686 CONTROL_PORT(0x0582, 0x0121, 1, "%s Control"),
1687 /* Roland SPD-SX */
1688 CONTROL_PORT(0x0582, 0x0145, 0, "%s Control"),
1689 EXTERNAL_PORT(0x0582, 0x0145, 1, "%s MIDI"),
1690 /* Roland A-Series */
1691 CONTROL_PORT(0x0582, 0x0156, 0, "%s Keyboard"),
1692 EXTERNAL_PORT(0x0582, 0x0156, 1, "%s MIDI"),
1693 /* Roland INTEGRA-7 */
1694 ROLAND_SYNTH_PORT(0x0582, 0x015b, 0, "%s Synth", 128),
1695 CONTROL_PORT(0x0582, 0x015b, 1, "%s Control"),
1696 /* M-Audio MidiSport 8x8 */
1697 CONTROL_PORT(0x0763, 0x1031, 8, "%s Control"),
1698 CONTROL_PORT(0x0763, 0x1033, 8, "%s Control"),
1699 /* MOTU Fastlane */
1700 EXTERNAL_PORT(0x07fd, 0x0001, 0, "%s MIDI A"),
1701 EXTERNAL_PORT(0x07fd, 0x0001, 1, "%s MIDI B"),
1702 /* Emagic Unitor8/AMT8/MT4 */
1703 EXTERNAL_PORT(0x086a, 0x0001, 8, "%s Broadcast"),
1704 EXTERNAL_PORT(0x086a, 0x0002, 8, "%s Broadcast"),
1705 EXTERNAL_PORT(0x086a, 0x0003, 4, "%s Broadcast"),
1706 /* Akai MPD16 */
1707 CONTROL_PORT(0x09e8, 0x0062, 0, "%s Control"),
1708 PORT_INFO(0x09e8, 0x0062, 1, "%s MIDI", 0,
1709 SNDRV_SEQ_PORT_TYPE_MIDI_GENERIC |
1710 SNDRV_SEQ_PORT_TYPE_HARDWARE),
1711 /* Access Music Virus TI */
1712 EXTERNAL_PORT(0x133e, 0x0815, 0, "%s MIDI"),
1713 PORT_INFO(0x133e, 0x0815, 1, "%s Synth", 0,
1714 SNDRV_SEQ_PORT_TYPE_MIDI_GENERIC |
1715 SNDRV_SEQ_PORT_TYPE_HARDWARE |
1716 SNDRV_SEQ_PORT_TYPE_SYNTHESIZER),
1717};
1718
1719static struct port_info *find_port_info(struct snd_usb_midi *umidi, int number)
1720{
1721 int i;
1722
1723 for (i = 0; i < ARRAY_SIZE(snd_usbmidi_port_info); ++i) {
1724 if (snd_usbmidi_port_info[i].id == umidi->usb_id &&
1725 snd_usbmidi_port_info[i].port == number)
1726 return &snd_usbmidi_port_info[i];
1727 }
1728 return NULL;
1729}
1730
1731static void snd_usbmidi_get_port_info(struct snd_rawmidi *rmidi, int number,
1732 struct snd_seq_port_info *seq_port_info)
1733{
1734 struct snd_usb_midi *umidi = rmidi->private_data;
1735 struct port_info *port_info;
1736
1737 /* TODO: read port flags from descriptors */
1738 port_info = find_port_info(umidi, number);
1739 if (port_info) {
1740 seq_port_info->type = port_info->seq_flags;
1741 seq_port_info->midi_voices = port_info->voices;
1742 }
1743}
1744
1745static struct usb_midi_in_jack_descriptor *find_usb_in_jack_descriptor(
1746 struct usb_host_interface *hostif, uint8_t jack_id)
1747{
1748 unsigned char *extra = hostif->extra;
1749 int extralen = hostif->extralen;
1750
1751 while (extralen > 4) {
1752 struct usb_midi_in_jack_descriptor *injd =
1753 (struct usb_midi_in_jack_descriptor *)extra;
1754
1755 if (injd->bLength >= sizeof(*injd) &&
1756 injd->bDescriptorType == USB_DT_CS_INTERFACE &&
1757 injd->bDescriptorSubtype == UAC_MIDI_IN_JACK &&
1758 injd->bJackID == jack_id)
1759 return injd;
1760 if (!extra[0])
1761 break;
1762 extralen -= extra[0];
1763 extra += extra[0];
1764 }
1765 return NULL;
1766}
1767
1768static struct usb_midi_out_jack_descriptor *find_usb_out_jack_descriptor(
1769 struct usb_host_interface *hostif, uint8_t jack_id)
1770{
1771 unsigned char *extra = hostif->extra;
1772 int extralen = hostif->extralen;
1773
1774 while (extralen > 4) {
1775 struct usb_midi_out_jack_descriptor *outjd =
1776 (struct usb_midi_out_jack_descriptor *)extra;
1777
1778 if (outjd->bLength >= sizeof(*outjd) &&
1779 outjd->bDescriptorType == USB_DT_CS_INTERFACE &&
1780 outjd->bDescriptorSubtype == UAC_MIDI_OUT_JACK &&
1781 outjd->bJackID == jack_id)
1782 return outjd;
1783 if (!extra[0])
1784 break;
1785 extralen -= extra[0];
1786 extra += extra[0];
1787 }
1788 return NULL;
1789}
1790
1791static void snd_usbmidi_init_substream(struct snd_usb_midi *umidi,
1792 int stream, int number, int jack_id,
1793 struct snd_rawmidi_substream **rsubstream)
1794{
1795 struct port_info *port_info;
1796 const char *name_format;
1797 struct usb_interface *intf;
1798 struct usb_host_interface *hostif;
1799 struct usb_midi_in_jack_descriptor *injd;
1800 struct usb_midi_out_jack_descriptor *outjd;
1801 uint8_t jack_name_buf[32];
1802 uint8_t *default_jack_name = "MIDI";
1803 uint8_t *jack_name = default_jack_name;
1804 uint8_t iJack;
1805 size_t sz;
1806 int res;
1807
1808 struct snd_rawmidi_substream *substream =
1809 snd_usbmidi_find_substream(umidi, stream, number);
1810 if (!substream) {
1811 dev_err(&umidi->dev->dev, "substream %d:%d not found\n", stream,
1812 number);
1813 return;
1814 }
1815
1816 intf = umidi->iface;
1817 if (intf && jack_id >= 0) {
1818 hostif = intf->cur_altsetting;
1819 iJack = 0;
1820 if (stream != SNDRV_RAWMIDI_STREAM_OUTPUT) {
1821 /* in jacks connect to outs */
1822 outjd = find_usb_out_jack_descriptor(hostif, jack_id);
1823 if (outjd) {
1824 sz = USB_DT_MIDI_OUT_SIZE(outjd->bNrInputPins);
1825 if (outjd->bLength >= sz)
1826 iJack = *(((uint8_t *) outjd) + sz - sizeof(uint8_t));
1827 }
1828 } else {
1829 /* and out jacks connect to ins */
1830 injd = find_usb_in_jack_descriptor(hostif, jack_id);
1831 if (injd)
1832 iJack = injd->iJack;
1833 }
1834 if (iJack != 0) {
1835 res = usb_string(umidi->dev, iJack, jack_name_buf,
1836 ARRAY_SIZE(jack_name_buf));
1837 if (res)
1838 jack_name = jack_name_buf;
1839 }
1840 }
1841
1842 port_info = find_port_info(umidi, number);
1843 name_format = port_info ? port_info->name :
1844 (jack_name != default_jack_name ? "%s %s" : "%s %s %d");
1845 snprintf(substream->name, sizeof(substream->name),
1846 name_format, umidi->card->shortname, jack_name, number + 1);
1847
1848 *rsubstream = substream;
1849}
1850
1851/*
1852 * Creates the endpoints and their ports.
1853 */
1854static int snd_usbmidi_create_endpoints(struct snd_usb_midi *umidi,
1855 struct snd_usb_midi_endpoint_info *endpoints)
1856{
1857 int i, j, err;
1858 int out_ports = 0, in_ports = 0;
1859
1860 for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i) {
1861 if (endpoints[i].out_cables) {
1862 err = snd_usbmidi_out_endpoint_create(umidi,
1863 &endpoints[i],
1864 &umidi->endpoints[i]);
1865 if (err < 0)
1866 return err;
1867 }
1868 if (endpoints[i].in_cables) {
1869 err = snd_usbmidi_in_endpoint_create(umidi,
1870 &endpoints[i],
1871 &umidi->endpoints[i]);
1872 if (err < 0)
1873 return err;
1874 }
1875
1876 for (j = 0; j < 0x10; ++j) {
1877 if (endpoints[i].out_cables & (1 << j)) {
1878 snd_usbmidi_init_substream(umidi,
1879 SNDRV_RAWMIDI_STREAM_OUTPUT,
1880 out_ports,
1881 endpoints[i].assoc_out_jacks[j],
1882 &umidi->endpoints[i].out->ports[j].substream);
1883 ++out_ports;
1884 }
1885 if (endpoints[i].in_cables & (1 << j)) {
1886 snd_usbmidi_init_substream(umidi,
1887 SNDRV_RAWMIDI_STREAM_INPUT,
1888 in_ports,
1889 endpoints[i].assoc_in_jacks[j],
1890 &umidi->endpoints[i].in->ports[j].substream);
1891 ++in_ports;
1892 }
1893 }
1894 }
1895 dev_dbg(&umidi->dev->dev, "created %d output and %d input ports\n",
1896 out_ports, in_ports);
1897 return 0;
1898}
1899
1900static struct usb_ms_endpoint_descriptor *find_usb_ms_endpoint_descriptor(
1901 struct usb_host_endpoint *hostep)
1902{
1903 unsigned char *extra = hostep->extra;
1904 int extralen = hostep->extralen;
1905
1906 while (extralen > 3) {
1907 struct usb_ms_endpoint_descriptor *ms_ep =
1908 (struct usb_ms_endpoint_descriptor *)extra;
1909
1910 if (ms_ep->bLength > 3 &&
1911 ms_ep->bDescriptorType == USB_DT_CS_ENDPOINT &&
1912 ms_ep->bDescriptorSubtype == UAC_MS_GENERAL)
1913 return ms_ep;
1914 if (!extra[0])
1915 break;
1916 extralen -= extra[0];
1917 extra += extra[0];
1918 }
1919 return NULL;
1920}
1921
1922/*
1923 * Returns MIDIStreaming device capabilities.
1924 */
1925static int snd_usbmidi_get_ms_info(struct snd_usb_midi *umidi,
1926 struct snd_usb_midi_endpoint_info *endpoints)
1927{
1928 struct usb_interface *intf;
1929 struct usb_host_interface *hostif;
1930 struct usb_interface_descriptor *intfd;
1931 struct usb_ms_header_descriptor *ms_header;
1932 struct usb_host_endpoint *hostep;
1933 struct usb_endpoint_descriptor *ep;
1934 struct usb_ms_endpoint_descriptor *ms_ep;
1935 int i, j, epidx;
1936
1937 intf = umidi->iface;
1938 if (!intf)
1939 return -ENXIO;
1940 hostif = &intf->altsetting[0];
1941 intfd = get_iface_desc(hostif);
1942 ms_header = (struct usb_ms_header_descriptor *)hostif->extra;
1943 if (hostif->extralen >= 7 &&
1944 ms_header->bLength >= 7 &&
1945 ms_header->bDescriptorType == USB_DT_CS_INTERFACE &&
1946 ms_header->bDescriptorSubtype == UAC_HEADER)
1947 dev_dbg(&umidi->dev->dev, "MIDIStreaming version %02x.%02x\n",
1948 ((uint8_t *)&ms_header->bcdMSC)[1], ((uint8_t *)&ms_header->bcdMSC)[0]);
1949 else
1950 dev_warn(&umidi->dev->dev,
1951 "MIDIStreaming interface descriptor not found\n");
1952
1953 epidx = 0;
1954 for (i = 0; i < intfd->bNumEndpoints; ++i) {
1955 hostep = &hostif->endpoint[i];
1956 ep = get_ep_desc(hostep);
1957 if (!usb_endpoint_xfer_bulk(ep) && !usb_endpoint_xfer_int(ep))
1958 continue;
1959 ms_ep = find_usb_ms_endpoint_descriptor(hostep);
1960 if (!ms_ep)
1961 continue;
1962 if (ms_ep->bLength <= sizeof(*ms_ep))
1963 continue;
1964 if (ms_ep->bNumEmbMIDIJack > 0x10)
1965 continue;
1966 if (ms_ep->bLength < sizeof(*ms_ep) + ms_ep->bNumEmbMIDIJack)
1967 continue;
1968 if (usb_endpoint_dir_out(ep)) {
1969 if (endpoints[epidx].out_ep) {
1970 if (++epidx >= MIDI_MAX_ENDPOINTS) {
1971 dev_warn(&umidi->dev->dev,
1972 "too many endpoints\n");
1973 break;
1974 }
1975 }
1976 endpoints[epidx].out_ep = usb_endpoint_num(ep);
1977 if (usb_endpoint_xfer_int(ep))
1978 endpoints[epidx].out_interval = ep->bInterval;
1979 else if (snd_usb_get_speed(umidi->dev) == USB_SPEED_LOW)
1980 /*
1981 * Low speed bulk transfers don't exist, so
1982 * force interrupt transfers for devices like
1983 * ESI MIDI Mate that try to use them anyway.
1984 */
1985 endpoints[epidx].out_interval = 1;
1986 endpoints[epidx].out_cables =
1987 (1 << ms_ep->bNumEmbMIDIJack) - 1;
1988 for (j = 0; j < ms_ep->bNumEmbMIDIJack; ++j)
1989 endpoints[epidx].assoc_out_jacks[j] = ms_ep->baAssocJackID[j];
1990 for (; j < ARRAY_SIZE(endpoints[epidx].assoc_out_jacks); ++j)
1991 endpoints[epidx].assoc_out_jacks[j] = -1;
1992 dev_dbg(&umidi->dev->dev, "EP %02X: %d jack(s)\n",
1993 ep->bEndpointAddress, ms_ep->bNumEmbMIDIJack);
1994 } else {
1995 if (endpoints[epidx].in_ep) {
1996 if (++epidx >= MIDI_MAX_ENDPOINTS) {
1997 dev_warn(&umidi->dev->dev,
1998 "too many endpoints\n");
1999 break;
2000 }
2001 }
2002 endpoints[epidx].in_ep = usb_endpoint_num(ep);
2003 if (usb_endpoint_xfer_int(ep))
2004 endpoints[epidx].in_interval = ep->bInterval;
2005 else if (snd_usb_get_speed(umidi->dev) == USB_SPEED_LOW)
2006 endpoints[epidx].in_interval = 1;
2007 endpoints[epidx].in_cables =
2008 (1 << ms_ep->bNumEmbMIDIJack) - 1;
2009 for (j = 0; j < ms_ep->bNumEmbMIDIJack; ++j)
2010 endpoints[epidx].assoc_in_jacks[j] = ms_ep->baAssocJackID[j];
2011 for (; j < ARRAY_SIZE(endpoints[epidx].assoc_in_jacks); ++j)
2012 endpoints[epidx].assoc_in_jacks[j] = -1;
2013 dev_dbg(&umidi->dev->dev, "EP %02X: %d jack(s)\n",
2014 ep->bEndpointAddress, ms_ep->bNumEmbMIDIJack);
2015 }
2016 }
2017 return 0;
2018}
2019
2020static int roland_load_info(struct snd_kcontrol *kcontrol,
2021 struct snd_ctl_elem_info *info)
2022{
2023 static const char *const names[] = { "High Load", "Light Load" };
2024
2025 return snd_ctl_enum_info(info, 1, 2, names);
2026}
2027
2028static int roland_load_get(struct snd_kcontrol *kcontrol,
2029 struct snd_ctl_elem_value *value)
2030{
2031 value->value.enumerated.item[0] = kcontrol->private_value;
2032 return 0;
2033}
2034
2035static int roland_load_put(struct snd_kcontrol *kcontrol,
2036 struct snd_ctl_elem_value *value)
2037{
2038 struct snd_usb_midi *umidi = kcontrol->private_data;
2039 int changed;
2040
2041 if (value->value.enumerated.item[0] > 1)
2042 return -EINVAL;
2043 mutex_lock(&umidi->mutex);
2044 changed = value->value.enumerated.item[0] != kcontrol->private_value;
2045 if (changed)
2046 kcontrol->private_value = value->value.enumerated.item[0];
2047 mutex_unlock(&umidi->mutex);
2048 return changed;
2049}
2050
2051static const struct snd_kcontrol_new roland_load_ctl = {
2052 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
2053 .name = "MIDI Input Mode",
2054 .info = roland_load_info,
2055 .get = roland_load_get,
2056 .put = roland_load_put,
2057 .private_value = 1,
2058};
2059
2060/*
2061 * On Roland devices, use the second alternate setting to be able to use
2062 * the interrupt input endpoint.
2063 */
2064static void snd_usbmidi_switch_roland_altsetting(struct snd_usb_midi *umidi)
2065{
2066 struct usb_interface *intf;
2067 struct usb_host_interface *hostif;
2068 struct usb_interface_descriptor *intfd;
2069
2070 intf = umidi->iface;
2071 if (!intf || intf->num_altsetting != 2)
2072 return;
2073
2074 hostif = &intf->altsetting[1];
2075 intfd = get_iface_desc(hostif);
2076 /* If either or both of the endpoints support interrupt transfer,
2077 * then use the alternate setting
2078 */
2079 if (intfd->bNumEndpoints != 2 ||
2080 !((get_endpoint(hostif, 0)->bmAttributes &
2081 USB_ENDPOINT_XFERTYPE_MASK) == USB_ENDPOINT_XFER_INT ||
2082 (get_endpoint(hostif, 1)->bmAttributes &
2083 USB_ENDPOINT_XFERTYPE_MASK) == USB_ENDPOINT_XFER_INT))
2084 return;
2085
2086 dev_dbg(&umidi->dev->dev, "switching to altsetting %d with int ep\n",
2087 intfd->bAlternateSetting);
2088 usb_set_interface(umidi->dev, intfd->bInterfaceNumber,
2089 intfd->bAlternateSetting);
2090
2091 umidi->roland_load_ctl = snd_ctl_new1(&roland_load_ctl, umidi);
2092 if (snd_ctl_add(umidi->card, umidi->roland_load_ctl) < 0)
2093 umidi->roland_load_ctl = NULL;
2094}
2095
2096/*
2097 * Try to find any usable endpoints in the interface.
2098 */
2099static int snd_usbmidi_detect_endpoints(struct snd_usb_midi *umidi,
2100 struct snd_usb_midi_endpoint_info *endpoint,
2101 int max_endpoints)
2102{
2103 struct usb_interface *intf;
2104 struct usb_host_interface *hostif;
2105 struct usb_interface_descriptor *intfd;
2106 struct usb_endpoint_descriptor *epd;
2107 int i, out_eps = 0, in_eps = 0;
2108
2109 if (USB_ID_VENDOR(umidi->usb_id) == 0x0582)
2110 snd_usbmidi_switch_roland_altsetting(umidi);
2111
2112 if (endpoint[0].out_ep || endpoint[0].in_ep)
2113 return 0;
2114
2115 intf = umidi->iface;
2116 if (!intf || intf->num_altsetting < 1)
2117 return -ENOENT;
2118 hostif = intf->cur_altsetting;
2119 intfd = get_iface_desc(hostif);
2120
2121 for (i = 0; i < intfd->bNumEndpoints; ++i) {
2122 epd = get_endpoint(hostif, i);
2123 if (!usb_endpoint_xfer_bulk(epd) &&
2124 !usb_endpoint_xfer_int(epd))
2125 continue;
2126 if (out_eps < max_endpoints &&
2127 usb_endpoint_dir_out(epd)) {
2128 endpoint[out_eps].out_ep = usb_endpoint_num(epd);
2129 if (usb_endpoint_xfer_int(epd))
2130 endpoint[out_eps].out_interval = epd->bInterval;
2131 ++out_eps;
2132 }
2133 if (in_eps < max_endpoints &&
2134 usb_endpoint_dir_in(epd)) {
2135 endpoint[in_eps].in_ep = usb_endpoint_num(epd);
2136 if (usb_endpoint_xfer_int(epd))
2137 endpoint[in_eps].in_interval = epd->bInterval;
2138 ++in_eps;
2139 }
2140 }
2141 return (out_eps || in_eps) ? 0 : -ENOENT;
2142}
2143
2144/*
2145 * Detects the endpoints for one-port-per-endpoint protocols.
2146 */
2147static int snd_usbmidi_detect_per_port_endpoints(struct snd_usb_midi *umidi,
2148 struct snd_usb_midi_endpoint_info *endpoints)
2149{
2150 int err, i;
2151
2152 err = snd_usbmidi_detect_endpoints(umidi, endpoints, MIDI_MAX_ENDPOINTS);
2153 for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i) {
2154 if (endpoints[i].out_ep)
2155 endpoints[i].out_cables = 0x0001;
2156 if (endpoints[i].in_ep)
2157 endpoints[i].in_cables = 0x0001;
2158 }
2159 return err;
2160}
2161
2162/*
2163 * Detects the endpoints and ports of Yamaha devices.
2164 */
2165static int snd_usbmidi_detect_yamaha(struct snd_usb_midi *umidi,
2166 struct snd_usb_midi_endpoint_info *endpoint)
2167{
2168 struct usb_interface *intf;
2169 struct usb_host_interface *hostif;
2170 struct usb_interface_descriptor *intfd;
2171 uint8_t *cs_desc;
2172
2173 intf = umidi->iface;
2174 if (!intf)
2175 return -ENOENT;
2176 hostif = intf->altsetting;
2177 intfd = get_iface_desc(hostif);
2178 if (intfd->bNumEndpoints < 1)
2179 return -ENOENT;
2180
2181 /*
2182 * For each port there is one MIDI_IN/OUT_JACK descriptor, not
2183 * necessarily with any useful contents. So simply count 'em.
2184 */
2185 for (cs_desc = hostif->extra;
2186 cs_desc < hostif->extra + hostif->extralen && cs_desc[0] >= 2;
2187 cs_desc += cs_desc[0]) {
2188 if (cs_desc[1] == USB_DT_CS_INTERFACE) {
2189 if (cs_desc[2] == UAC_MIDI_IN_JACK)
2190 endpoint->in_cables =
2191 (endpoint->in_cables << 1) | 1;
2192 else if (cs_desc[2] == UAC_MIDI_OUT_JACK)
2193 endpoint->out_cables =
2194 (endpoint->out_cables << 1) | 1;
2195 }
2196 }
2197 if (!endpoint->in_cables && !endpoint->out_cables)
2198 return -ENOENT;
2199
2200 return snd_usbmidi_detect_endpoints(umidi, endpoint, 1);
2201}
2202
2203/*
2204 * Detects the endpoints and ports of Roland devices.
2205 */
2206static int snd_usbmidi_detect_roland(struct snd_usb_midi *umidi,
2207 struct snd_usb_midi_endpoint_info *endpoint)
2208{
2209 struct usb_interface *intf;
2210 struct usb_host_interface *hostif;
2211 u8 *cs_desc;
2212
2213 intf = umidi->iface;
2214 if (!intf)
2215 return -ENOENT;
2216 hostif = intf->altsetting;
2217 /*
2218 * Some devices have a descriptor <06 24 F1 02 <inputs> <outputs>>,
2219 * some have standard class descriptors, or both kinds, or neither.
2220 */
2221 for (cs_desc = hostif->extra;
2222 cs_desc < hostif->extra + hostif->extralen && cs_desc[0] >= 2;
2223 cs_desc += cs_desc[0]) {
2224 if (cs_desc[0] >= 6 &&
2225 cs_desc[1] == USB_DT_CS_INTERFACE &&
2226 cs_desc[2] == 0xf1 &&
2227 cs_desc[3] == 0x02) {
2228 if (cs_desc[4] > 0x10 || cs_desc[5] > 0x10)
2229 continue;
2230 endpoint->in_cables = (1 << cs_desc[4]) - 1;
2231 endpoint->out_cables = (1 << cs_desc[5]) - 1;
2232 return snd_usbmidi_detect_endpoints(umidi, endpoint, 1);
2233 } else if (cs_desc[0] >= 7 &&
2234 cs_desc[1] == USB_DT_CS_INTERFACE &&
2235 cs_desc[2] == UAC_HEADER) {
2236 return snd_usbmidi_get_ms_info(umidi, endpoint);
2237 }
2238 }
2239
2240 return -ENODEV;
2241}
2242
2243/*
2244 * Creates the endpoints and their ports for Midiman devices.
2245 */
2246static int snd_usbmidi_create_endpoints_midiman(struct snd_usb_midi *umidi,
2247 struct snd_usb_midi_endpoint_info *endpoint)
2248{
2249 struct snd_usb_midi_endpoint_info ep_info;
2250 struct usb_interface *intf;
2251 struct usb_host_interface *hostif;
2252 struct usb_interface_descriptor *intfd;
2253 struct usb_endpoint_descriptor *epd;
2254 int cable, err;
2255
2256 intf = umidi->iface;
2257 if (!intf)
2258 return -ENOENT;
2259 hostif = intf->altsetting;
2260 intfd = get_iface_desc(hostif);
2261 /*
2262 * The various MidiSport devices have more or less random endpoint
2263 * numbers, so we have to identify the endpoints by their index in
2264 * the descriptor array, like the driver for that other OS does.
2265 *
2266 * There is one interrupt input endpoint for all input ports, one
2267 * bulk output endpoint for even-numbered ports, and one for odd-
2268 * numbered ports. Both bulk output endpoints have corresponding
2269 * input bulk endpoints (at indices 1 and 3) which aren't used.
2270 */
2271 if (intfd->bNumEndpoints < (endpoint->out_cables > 0x0001 ? 5 : 3)) {
2272 dev_dbg(&umidi->dev->dev, "not enough endpoints\n");
2273 return -ENOENT;
2274 }
2275
2276 epd = get_endpoint(hostif, 0);
2277 if (!usb_endpoint_dir_in(epd) || !usb_endpoint_xfer_int(epd)) {
2278 dev_dbg(&umidi->dev->dev, "endpoint[0] isn't interrupt\n");
2279 return -ENXIO;
2280 }
2281 epd = get_endpoint(hostif, 2);
2282 if (!usb_endpoint_dir_out(epd) || !usb_endpoint_xfer_bulk(epd)) {
2283 dev_dbg(&umidi->dev->dev, "endpoint[2] isn't bulk output\n");
2284 return -ENXIO;
2285 }
2286 if (endpoint->out_cables > 0x0001) {
2287 epd = get_endpoint(hostif, 4);
2288 if (!usb_endpoint_dir_out(epd) ||
2289 !usb_endpoint_xfer_bulk(epd)) {
2290 dev_dbg(&umidi->dev->dev,
2291 "endpoint[4] isn't bulk output\n");
2292 return -ENXIO;
2293 }
2294 }
2295
2296 ep_info.out_ep = get_endpoint(hostif, 2)->bEndpointAddress &
2297 USB_ENDPOINT_NUMBER_MASK;
2298 ep_info.out_interval = 0;
2299 ep_info.out_cables = endpoint->out_cables & 0x5555;
2300 err = snd_usbmidi_out_endpoint_create(umidi, &ep_info,
2301 &umidi->endpoints[0]);
2302 if (err < 0)
2303 return err;
2304
2305 ep_info.in_ep = get_endpoint(hostif, 0)->bEndpointAddress &
2306 USB_ENDPOINT_NUMBER_MASK;
2307 ep_info.in_interval = get_endpoint(hostif, 0)->bInterval;
2308 ep_info.in_cables = endpoint->in_cables;
2309 err = snd_usbmidi_in_endpoint_create(umidi, &ep_info,
2310 &umidi->endpoints[0]);
2311 if (err < 0)
2312 return err;
2313
2314 if (endpoint->out_cables > 0x0001) {
2315 ep_info.out_ep = get_endpoint(hostif, 4)->bEndpointAddress &
2316 USB_ENDPOINT_NUMBER_MASK;
2317 ep_info.out_cables = endpoint->out_cables & 0xaaaa;
2318 err = snd_usbmidi_out_endpoint_create(umidi, &ep_info,
2319 &umidi->endpoints[1]);
2320 if (err < 0)
2321 return err;
2322 }
2323
2324 for (cable = 0; cable < 0x10; ++cable) {
2325 if (endpoint->out_cables & (1 << cable))
2326 snd_usbmidi_init_substream(umidi,
2327 SNDRV_RAWMIDI_STREAM_OUTPUT,
2328 cable,
2329 -1 /* prevent trying to find jack */,
2330 &umidi->endpoints[cable & 1].out->ports[cable].substream);
2331 if (endpoint->in_cables & (1 << cable))
2332 snd_usbmidi_init_substream(umidi,
2333 SNDRV_RAWMIDI_STREAM_INPUT,
2334 cable,
2335 -1 /* prevent trying to find jack */,
2336 &umidi->endpoints[0].in->ports[cable].substream);
2337 }
2338 return 0;
2339}
2340
2341static const struct snd_rawmidi_global_ops snd_usbmidi_ops = {
2342 .get_port_info = snd_usbmidi_get_port_info,
2343};
2344
2345static int snd_usbmidi_create_rawmidi(struct snd_usb_midi *umidi,
2346 int out_ports, int in_ports)
2347{
2348 struct snd_rawmidi *rmidi;
2349 int err;
2350
2351 err = snd_rawmidi_new(umidi->card, "USB MIDI",
2352 umidi->next_midi_device++,
2353 out_ports, in_ports, &rmidi);
2354 if (err < 0)
2355 return err;
2356 strcpy(rmidi->name, umidi->card->shortname);
2357 rmidi->info_flags = SNDRV_RAWMIDI_INFO_OUTPUT |
2358 SNDRV_RAWMIDI_INFO_INPUT |
2359 SNDRV_RAWMIDI_INFO_DUPLEX;
2360 rmidi->ops = &snd_usbmidi_ops;
2361 rmidi->private_data = umidi;
2362 rmidi->private_free = snd_usbmidi_rawmidi_free;
2363 snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT,
2364 &snd_usbmidi_output_ops);
2365 snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_INPUT,
2366 &snd_usbmidi_input_ops);
2367
2368 umidi->rmidi = rmidi;
2369 return 0;
2370}
2371
2372/*
2373 * Temporarily stop input.
2374 */
2375void snd_usbmidi_input_stop(struct list_head *p)
2376{
2377 struct snd_usb_midi *umidi;
2378 unsigned int i, j;
2379
2380 umidi = list_entry(p, struct snd_usb_midi, list);
2381 if (!umidi->input_running)
2382 return;
2383 for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i) {
2384 struct snd_usb_midi_endpoint *ep = &umidi->endpoints[i];
2385 if (ep->in)
2386 for (j = 0; j < INPUT_URBS; ++j)
2387 usb_kill_urb(ep->in->urbs[j]);
2388 }
2389 umidi->input_running = 0;
2390}
2391EXPORT_SYMBOL(snd_usbmidi_input_stop);
2392
2393static void snd_usbmidi_input_start_ep(struct snd_usb_midi *umidi,
2394 struct snd_usb_midi_in_endpoint *ep)
2395{
2396 unsigned int i;
2397 unsigned long flags;
2398
2399 if (!ep)
2400 return;
2401 for (i = 0; i < INPUT_URBS; ++i) {
2402 struct urb *urb = ep->urbs[i];
2403 spin_lock_irqsave(&umidi->disc_lock, flags);
2404 if (!atomic_read(&urb->use_count)) {
2405 urb->dev = ep->umidi->dev;
2406 snd_usbmidi_submit_urb(urb, GFP_ATOMIC);
2407 }
2408 spin_unlock_irqrestore(&umidi->disc_lock, flags);
2409 }
2410}
2411
2412/*
2413 * Resume input after a call to snd_usbmidi_input_stop().
2414 */
2415void snd_usbmidi_input_start(struct list_head *p)
2416{
2417 struct snd_usb_midi *umidi;
2418 int i;
2419
2420 umidi = list_entry(p, struct snd_usb_midi, list);
2421 if (umidi->input_running || !umidi->opened[1])
2422 return;
2423 for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i)
2424 snd_usbmidi_input_start_ep(umidi, umidi->endpoints[i].in);
2425 umidi->input_running = 1;
2426}
2427EXPORT_SYMBOL(snd_usbmidi_input_start);
2428
2429/*
2430 * Prepare for suspend. Typically called from the USB suspend callback.
2431 */
2432void snd_usbmidi_suspend(struct list_head *p)
2433{
2434 struct snd_usb_midi *umidi;
2435
2436 umidi = list_entry(p, struct snd_usb_midi, list);
2437 mutex_lock(&umidi->mutex);
2438 snd_usbmidi_input_stop(p);
2439 mutex_unlock(&umidi->mutex);
2440}
2441EXPORT_SYMBOL(snd_usbmidi_suspend);
2442
2443/*
2444 * Resume. Typically called from the USB resume callback.
2445 */
2446void snd_usbmidi_resume(struct list_head *p)
2447{
2448 struct snd_usb_midi *umidi;
2449
2450 umidi = list_entry(p, struct snd_usb_midi, list);
2451 mutex_lock(&umidi->mutex);
2452 snd_usbmidi_input_start(p);
2453 mutex_unlock(&umidi->mutex);
2454}
2455EXPORT_SYMBOL(snd_usbmidi_resume);
2456
2457/*
2458 * Creates and registers everything needed for a MIDI streaming interface.
2459 */
2460int __snd_usbmidi_create(struct snd_card *card,
2461 struct usb_interface *iface,
2462 struct list_head *midi_list,
2463 const struct snd_usb_audio_quirk *quirk,
2464 unsigned int usb_id)
2465{
2466 struct snd_usb_midi *umidi;
2467 struct snd_usb_midi_endpoint_info endpoints[MIDI_MAX_ENDPOINTS];
2468 int out_ports, in_ports;
2469 int i, err;
2470
2471 umidi = kzalloc(sizeof(*umidi), GFP_KERNEL);
2472 if (!umidi)
2473 return -ENOMEM;
2474 umidi->dev = interface_to_usbdev(iface);
2475 umidi->card = card;
2476 umidi->iface = iface;
2477 umidi->quirk = quirk;
2478 umidi->usb_protocol_ops = &snd_usbmidi_standard_ops;
2479 spin_lock_init(&umidi->disc_lock);
2480 init_rwsem(&umidi->disc_rwsem);
2481 mutex_init(&umidi->mutex);
2482 if (!usb_id)
2483 usb_id = USB_ID(le16_to_cpu(umidi->dev->descriptor.idVendor),
2484 le16_to_cpu(umidi->dev->descriptor.idProduct));
2485 umidi->usb_id = usb_id;
2486 timer_setup(&umidi->error_timer, snd_usbmidi_error_timer, 0);
2487
2488 /* detect the endpoint(s) to use */
2489 memset(endpoints, 0, sizeof(endpoints));
2490 switch (quirk ? quirk->type : QUIRK_MIDI_STANDARD_INTERFACE) {
2491 case QUIRK_MIDI_STANDARD_INTERFACE:
2492 err = snd_usbmidi_get_ms_info(umidi, endpoints);
2493 if (umidi->usb_id == USB_ID(0x0763, 0x0150)) /* M-Audio Uno */
2494 umidi->usb_protocol_ops =
2495 &snd_usbmidi_maudio_broken_running_status_ops;
2496 break;
2497 case QUIRK_MIDI_US122L:
2498 umidi->usb_protocol_ops = &snd_usbmidi_122l_ops;
2499 fallthrough;
2500 case QUIRK_MIDI_FIXED_ENDPOINT:
2501 memcpy(&endpoints[0], quirk->data,
2502 sizeof(struct snd_usb_midi_endpoint_info));
2503 err = snd_usbmidi_detect_endpoints(umidi, &endpoints[0], 1);
2504 break;
2505 case QUIRK_MIDI_YAMAHA:
2506 err = snd_usbmidi_detect_yamaha(umidi, &endpoints[0]);
2507 break;
2508 case QUIRK_MIDI_ROLAND:
2509 err = snd_usbmidi_detect_roland(umidi, &endpoints[0]);
2510 break;
2511 case QUIRK_MIDI_MIDIMAN:
2512 umidi->usb_protocol_ops = &snd_usbmidi_midiman_ops;
2513 memcpy(&endpoints[0], quirk->data,
2514 sizeof(struct snd_usb_midi_endpoint_info));
2515 err = 0;
2516 break;
2517 case QUIRK_MIDI_NOVATION:
2518 umidi->usb_protocol_ops = &snd_usbmidi_novation_ops;
2519 err = snd_usbmidi_detect_per_port_endpoints(umidi, endpoints);
2520 break;
2521 case QUIRK_MIDI_RAW_BYTES:
2522 umidi->usb_protocol_ops = &snd_usbmidi_raw_ops;
2523 /*
2524 * Interface 1 contains isochronous endpoints, but with the same
2525 * numbers as in interface 0. Since it is interface 1 that the
2526 * USB core has most recently seen, these descriptors are now
2527 * associated with the endpoint numbers. This will foul up our
2528 * attempts to submit bulk/interrupt URBs to the endpoints in
2529 * interface 0, so we have to make sure that the USB core looks
2530 * again at interface 0 by calling usb_set_interface() on it.
2531 */
2532 if (umidi->usb_id == USB_ID(0x07fd, 0x0001)) /* MOTU Fastlane */
2533 usb_set_interface(umidi->dev, 0, 0);
2534 err = snd_usbmidi_detect_per_port_endpoints(umidi, endpoints);
2535 break;
2536 case QUIRK_MIDI_EMAGIC:
2537 umidi->usb_protocol_ops = &snd_usbmidi_emagic_ops;
2538 memcpy(&endpoints[0], quirk->data,
2539 sizeof(struct snd_usb_midi_endpoint_info));
2540 err = snd_usbmidi_detect_endpoints(umidi, &endpoints[0], 1);
2541 break;
2542 case QUIRK_MIDI_CME:
2543 umidi->usb_protocol_ops = &snd_usbmidi_cme_ops;
2544 err = snd_usbmidi_detect_per_port_endpoints(umidi, endpoints);
2545 break;
2546 case QUIRK_MIDI_AKAI:
2547 umidi->usb_protocol_ops = &snd_usbmidi_akai_ops;
2548 err = snd_usbmidi_detect_per_port_endpoints(umidi, endpoints);
2549 /* endpoint 1 is input-only */
2550 endpoints[1].out_cables = 0;
2551 break;
2552 case QUIRK_MIDI_FTDI:
2553 umidi->usb_protocol_ops = &snd_usbmidi_ftdi_ops;
2554
2555 /* set baud rate to 31250 (48 MHz / 16 / 96) */
2556 err = usb_control_msg(umidi->dev, usb_sndctrlpipe(umidi->dev, 0),
2557 3, 0x40, 0x60, 0, NULL, 0, 1000);
2558 if (err < 0)
2559 break;
2560
2561 err = snd_usbmidi_detect_per_port_endpoints(umidi, endpoints);
2562 break;
2563 case QUIRK_MIDI_CH345:
2564 umidi->usb_protocol_ops = &snd_usbmidi_ch345_broken_sysex_ops;
2565 err = snd_usbmidi_detect_per_port_endpoints(umidi, endpoints);
2566 break;
2567 default:
2568 dev_err(&umidi->dev->dev, "invalid quirk type %d\n",
2569 quirk->type);
2570 err = -ENXIO;
2571 break;
2572 }
2573 if (err < 0)
2574 goto free_midi;
2575
2576 /* create rawmidi device */
2577 out_ports = 0;
2578 in_ports = 0;
2579 for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i) {
2580 out_ports += hweight16(endpoints[i].out_cables);
2581 in_ports += hweight16(endpoints[i].in_cables);
2582 }
2583 err = snd_usbmidi_create_rawmidi(umidi, out_ports, in_ports);
2584 if (err < 0)
2585 goto free_midi;
2586
2587 /* create endpoint/port structures */
2588 if (quirk && quirk->type == QUIRK_MIDI_MIDIMAN)
2589 err = snd_usbmidi_create_endpoints_midiman(umidi, &endpoints[0]);
2590 else
2591 err = snd_usbmidi_create_endpoints(umidi, endpoints);
2592 if (err < 0)
2593 goto exit;
2594
2595 usb_autopm_get_interface_no_resume(umidi->iface);
2596
2597 list_add_tail(&umidi->list, midi_list);
2598 return 0;
2599
2600free_midi:
2601 kfree(umidi);
2602exit:
2603 return err;
2604}
2605EXPORT_SYMBOL(__snd_usbmidi_create);