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
77 MODULE_AUTHOR("Clemens Ladisch <clemens@ladisch.de>");
78 MODULE_DESCRIPTION("USB Audio/MIDI helper module");
79 MODULE_LICENSE("Dual BSD/GPL");
80
81 struct snd_usb_midi_in_endpoint;
82 struct snd_usb_midi_out_endpoint;
83 struct snd_usb_midi_endpoint;
84
85 struct 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
93 struct 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
120 struct 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
153 struct 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
167 static void snd_usbmidi_do_output(struct snd_usb_midi_out_endpoint *ep);
168
169 static 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 */
snd_usbmidi_submit_urb(struct urb * urb,gfp_t flags)176 static 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 */
snd_usbmidi_urb_error(const struct urb * urb)187 static 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 */
snd_usbmidi_input_data(struct snd_usb_midi_in_endpoint * ep,int portidx,uint8_t * data,int length)210 static 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
dump_urb(const char * type,const u8 * data,int length)225 static 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 */
snd_usbmidi_in_urb_complete(struct urb * urb)239 static 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
snd_usbmidi_out_urb_complete(struct urb * urb)263 static 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 */
snd_usbmidi_do_output(struct snd_usb_midi_out_endpoint * ep)294 static 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
snd_usbmidi_out_work(struct work_struct * work)331 static 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 */
snd_usbmidi_error_timer(struct timer_list * t)340 static 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 */
send_bulk_static_data(struct snd_usb_midi_out_endpoint * ep,const void * data,int len)368 static 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
snd_usbmidi_standard_input(struct snd_usb_midi_in_endpoint * ep,uint8_t * buffer,int buffer_length)389 static 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
snd_usbmidi_midiman_input(struct snd_usb_midi_in_endpoint * ep,uint8_t * buffer,int buffer_length)403 static 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 */
snd_usbmidi_maudio_broken_running_status_input(struct snd_usb_midi_in_endpoint * ep,uint8_t * buffer,int buffer_length)420 static 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 */
ch345_broken_sysex_input(struct snd_usb_midi_in_endpoint * ep,uint8_t * buffer,int buffer_length)461 static 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 */
snd_usbmidi_cme_input(struct snd_usb_midi_in_endpoint * ep,uint8_t * buffer,int buffer_length)494 static 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 */
snd_usbmidi_output_standard_packet(struct urb * urb,uint8_t p0,uint8_t p1,uint8_t p2,uint8_t p3)507 static 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 */
snd_usbmidi_output_midiman_packet(struct urb * urb,uint8_t p0,uint8_t p1,uint8_t p2,uint8_t p3)524 static 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 */
snd_usbmidi_transmit_byte(struct usbmidi_out_port * port,uint8_t b,struct urb * urb)541 static 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
snd_usbmidi_standard_output(struct snd_usb_midi_out_endpoint * ep,struct urb * urb)638 static 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
659 static 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
665 static 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
671 static const
672 struct 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
678 static 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
684 static 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 */
snd_usbmidi_akai_input(struct snd_usb_midi_in_endpoint * ep,uint8_t * buffer,int buffer_length)705 static 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
snd_usbmidi_akai_output(struct snd_usb_midi_out_endpoint * ep,struct urb * urb)722 static 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
784 static 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
snd_usbmidi_novation_input(struct snd_usb_midi_in_endpoint * ep,uint8_t * buffer,int buffer_length)795 static 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
snd_usbmidi_novation_output(struct snd_usb_midi_out_endpoint * ep,struct urb * urb)803 static 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
824 static 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
snd_usbmidi_raw_input(struct snd_usb_midi_in_endpoint * ep,uint8_t * buffer,int buffer_length)833 static 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
snd_usbmidi_raw_output(struct snd_usb_midi_out_endpoint * ep,struct urb * urb)839 static 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
856 static 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
snd_usbmidi_ftdi_input(struct snd_usb_midi_in_endpoint * ep,uint8_t * buffer,int buffer_length)865 static 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
872 static const struct usb_protocol_ops snd_usbmidi_ftdi_ops = {
873 .input = snd_usbmidi_ftdi_input,
874 .output = snd_usbmidi_raw_output,
875 };
876
snd_usbmidi_us122l_input(struct snd_usb_midi_in_endpoint * ep,uint8_t * buffer,int buffer_length)877 static 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
snd_usbmidi_us122l_output(struct snd_usb_midi_out_endpoint * ep,struct urb * urb)889 static 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
917 static 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
snd_usbmidi_emagic_init_out(struct snd_usb_midi_out_endpoint * ep)926 static 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
snd_usbmidi_emagic_finish_out(struct snd_usb_midi_out_endpoint * ep)943 static 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
snd_usbmidi_emagic_input(struct snd_usb_midi_in_endpoint * ep,uint8_t * buffer,int buffer_length)959 static 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
snd_usbmidi_emagic_output(struct snd_usb_midi_out_endpoint * ep,struct urb * urb)1003 static 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
1050 static 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
update_roland_altsetting(struct snd_usb_midi * umidi)1058 static 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
substream_open(struct snd_rawmidi_substream * substream,int dir,int open)1077 static 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
snd_usbmidi_output_open(struct snd_rawmidi_substream * substream)1123 static 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
snd_usbmidi_output_close(struct snd_rawmidi_substream * substream)1144 static 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
snd_usbmidi_output_trigger(struct snd_rawmidi_substream * substream,int up)1152 static 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
snd_usbmidi_output_drain(struct snd_rawmidi_substream * substream)1170 static 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
snd_usbmidi_input_open(struct snd_rawmidi_substream * substream)1202 static int snd_usbmidi_input_open(struct snd_rawmidi_substream *substream)
1203 {
1204 return substream_open(substream, 1, 1);
1205 }
1206
snd_usbmidi_input_close(struct snd_rawmidi_substream * substream)1207 static int snd_usbmidi_input_close(struct snd_rawmidi_substream *substream)
1208 {
1209 return substream_open(substream, 1, 0);
1210 }
1211
snd_usbmidi_input_trigger(struct snd_rawmidi_substream * substream,int up)1212 static 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
1223 static 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
1230 static 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
free_urb_and_buffer(struct snd_usb_midi * umidi,struct urb * urb,unsigned int buffer_length)1236 static 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 */
snd_usbmidi_in_endpoint_delete(struct snd_usb_midi_in_endpoint * ep)1248 static 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 */
snd_usbmidi_in_endpoint_create(struct snd_usb_midi * umidi,struct snd_usb_midi_endpoint_info * ep_info,struct snd_usb_midi_endpoint * rep)1262 static 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 */
snd_usbmidi_out_endpoint_clear(struct snd_usb_midi_out_endpoint * ep)1328 static 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
snd_usbmidi_out_endpoint_delete(struct snd_usb_midi_out_endpoint * ep)1340 static 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 */
snd_usbmidi_out_endpoint_create(struct snd_usb_midi * umidi,struct snd_usb_midi_endpoint_info * ep_info,struct snd_usb_midi_endpoint * rep)1349 static 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 */
snd_usbmidi_free(struct snd_usb_midi * umidi)1453 static 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 */
snd_usbmidi_disconnect(struct list_head * p)1471 void 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 }
1517 EXPORT_SYMBOL(snd_usbmidi_disconnect);
1518
snd_usbmidi_rawmidi_free(struct snd_rawmidi * rmidi)1519 static 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
snd_usbmidi_find_substream(struct snd_usb_midi * umidi,int stream,int number)1525 static 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 */
1544 static 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
find_port_info(struct snd_usb_midi * umidi,int number)1719 static 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
snd_usbmidi_get_port_info(struct snd_rawmidi * rmidi,int number,struct snd_seq_port_info * seq_port_info)1731 static 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
find_usb_in_jack_descriptor(struct usb_host_interface * hostif,uint8_t jack_id)1745 static 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
find_usb_out_jack_descriptor(struct usb_host_interface * hostif,uint8_t jack_id)1768 static 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
snd_usbmidi_init_substream(struct snd_usb_midi * umidi,int stream,int number,int jack_id,struct snd_rawmidi_substream ** rsubstream)1791 static 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 */
snd_usbmidi_create_endpoints(struct snd_usb_midi * umidi,struct snd_usb_midi_endpoint_info * endpoints)1854 static 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
find_usb_ms_endpoint_descriptor(struct usb_host_endpoint * hostep)1900 static 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 */
snd_usbmidi_get_ms_info(struct snd_usb_midi * umidi,struct snd_usb_midi_endpoint_info * endpoints)1925 static 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
roland_load_info(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_info * info)2020 static 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
roland_load_get(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * value)2028 static 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
roland_load_put(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * value)2035 static 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
2051 static 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 */
snd_usbmidi_switch_roland_altsetting(struct snd_usb_midi * umidi)2064 static 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 */
snd_usbmidi_detect_endpoints(struct snd_usb_midi * umidi,struct snd_usb_midi_endpoint_info * endpoint,int max_endpoints)2099 static 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 */
snd_usbmidi_detect_per_port_endpoints(struct snd_usb_midi * umidi,struct snd_usb_midi_endpoint_info * endpoints)2147 static 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 */
snd_usbmidi_detect_yamaha(struct snd_usb_midi * umidi,struct snd_usb_midi_endpoint_info * endpoint)2165 static 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 */
snd_usbmidi_detect_roland(struct snd_usb_midi * umidi,struct snd_usb_midi_endpoint_info * endpoint)2206 static 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 */
snd_usbmidi_create_endpoints_midiman(struct snd_usb_midi * umidi,struct snd_usb_midi_endpoint_info * endpoint)2246 static 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
2341 static const struct snd_rawmidi_global_ops snd_usbmidi_ops = {
2342 .get_port_info = snd_usbmidi_get_port_info,
2343 };
2344
snd_usbmidi_create_rawmidi(struct snd_usb_midi * umidi,int out_ports,int in_ports)2345 static 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 */
snd_usbmidi_input_stop(struct list_head * p)2375 void 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 }
2391 EXPORT_SYMBOL(snd_usbmidi_input_stop);
2392
snd_usbmidi_input_start_ep(struct snd_usb_midi * umidi,struct snd_usb_midi_in_endpoint * ep)2393 static 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 */
snd_usbmidi_input_start(struct list_head * p)2415 void 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 }
2427 EXPORT_SYMBOL(snd_usbmidi_input_start);
2428
2429 /*
2430 * Prepare for suspend. Typically called from the USB suspend callback.
2431 */
snd_usbmidi_suspend(struct list_head * p)2432 void 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 }
2441 EXPORT_SYMBOL(snd_usbmidi_suspend);
2442
2443 /*
2444 * Resume. Typically called from the USB resume callback.
2445 */
snd_usbmidi_resume(struct list_head * p)2446 void 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 }
2455 EXPORT_SYMBOL(snd_usbmidi_resume);
2456
2457 /*
2458 * Creates and registers everything needed for a MIDI streaming interface.
2459 */
__snd_usbmidi_create(struct snd_card * card,struct usb_interface * iface,struct list_head * midi_list,const struct snd_usb_audio_quirk * quirk,unsigned int usb_id,unsigned int * num_rawmidis)2460 int __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 unsigned int *num_rawmidis)
2466 {
2467 struct snd_usb_midi *umidi;
2468 struct snd_usb_midi_endpoint_info endpoints[MIDI_MAX_ENDPOINTS];
2469 int out_ports, in_ports;
2470 int i, err;
2471
2472 umidi = kzalloc(sizeof(*umidi), GFP_KERNEL);
2473 if (!umidi)
2474 return -ENOMEM;
2475 umidi->dev = interface_to_usbdev(iface);
2476 umidi->card = card;
2477 umidi->iface = iface;
2478 umidi->quirk = quirk;
2479 umidi->usb_protocol_ops = &snd_usbmidi_standard_ops;
2480 if (num_rawmidis)
2481 umidi->next_midi_device = *num_rawmidis;
2482 spin_lock_init(&umidi->disc_lock);
2483 init_rwsem(&umidi->disc_rwsem);
2484 mutex_init(&umidi->mutex);
2485 if (!usb_id)
2486 usb_id = USB_ID(le16_to_cpu(umidi->dev->descriptor.idVendor),
2487 le16_to_cpu(umidi->dev->descriptor.idProduct));
2488 umidi->usb_id = usb_id;
2489 timer_setup(&umidi->error_timer, snd_usbmidi_error_timer, 0);
2490
2491 /* detect the endpoint(s) to use */
2492 memset(endpoints, 0, sizeof(endpoints));
2493 switch (quirk ? quirk->type : QUIRK_MIDI_STANDARD_INTERFACE) {
2494 case QUIRK_MIDI_STANDARD_INTERFACE:
2495 err = snd_usbmidi_get_ms_info(umidi, endpoints);
2496 if (umidi->usb_id == USB_ID(0x0763, 0x0150)) /* M-Audio Uno */
2497 umidi->usb_protocol_ops =
2498 &snd_usbmidi_maudio_broken_running_status_ops;
2499 break;
2500 case QUIRK_MIDI_US122L:
2501 umidi->usb_protocol_ops = &snd_usbmidi_122l_ops;
2502 fallthrough;
2503 case QUIRK_MIDI_FIXED_ENDPOINT:
2504 memcpy(&endpoints[0], quirk->data,
2505 sizeof(struct snd_usb_midi_endpoint_info));
2506 err = snd_usbmidi_detect_endpoints(umidi, &endpoints[0], 1);
2507 break;
2508 case QUIRK_MIDI_YAMAHA:
2509 err = snd_usbmidi_detect_yamaha(umidi, &endpoints[0]);
2510 break;
2511 case QUIRK_MIDI_ROLAND:
2512 err = snd_usbmidi_detect_roland(umidi, &endpoints[0]);
2513 break;
2514 case QUIRK_MIDI_MIDIMAN:
2515 umidi->usb_protocol_ops = &snd_usbmidi_midiman_ops;
2516 memcpy(&endpoints[0], quirk->data,
2517 sizeof(struct snd_usb_midi_endpoint_info));
2518 err = 0;
2519 break;
2520 case QUIRK_MIDI_NOVATION:
2521 umidi->usb_protocol_ops = &snd_usbmidi_novation_ops;
2522 err = snd_usbmidi_detect_per_port_endpoints(umidi, endpoints);
2523 break;
2524 case QUIRK_MIDI_RAW_BYTES:
2525 umidi->usb_protocol_ops = &snd_usbmidi_raw_ops;
2526 /*
2527 * Interface 1 contains isochronous endpoints, but with the same
2528 * numbers as in interface 0. Since it is interface 1 that the
2529 * USB core has most recently seen, these descriptors are now
2530 * associated with the endpoint numbers. This will foul up our
2531 * attempts to submit bulk/interrupt URBs to the endpoints in
2532 * interface 0, so we have to make sure that the USB core looks
2533 * again at interface 0 by calling usb_set_interface() on it.
2534 */
2535 if (umidi->usb_id == USB_ID(0x07fd, 0x0001)) /* MOTU Fastlane */
2536 usb_set_interface(umidi->dev, 0, 0);
2537 err = snd_usbmidi_detect_per_port_endpoints(umidi, endpoints);
2538 break;
2539 case QUIRK_MIDI_EMAGIC:
2540 umidi->usb_protocol_ops = &snd_usbmidi_emagic_ops;
2541 memcpy(&endpoints[0], quirk->data,
2542 sizeof(struct snd_usb_midi_endpoint_info));
2543 err = snd_usbmidi_detect_endpoints(umidi, &endpoints[0], 1);
2544 break;
2545 case QUIRK_MIDI_CME:
2546 umidi->usb_protocol_ops = &snd_usbmidi_cme_ops;
2547 err = snd_usbmidi_detect_per_port_endpoints(umidi, endpoints);
2548 break;
2549 case QUIRK_MIDI_AKAI:
2550 umidi->usb_protocol_ops = &snd_usbmidi_akai_ops;
2551 err = snd_usbmidi_detect_per_port_endpoints(umidi, endpoints);
2552 /* endpoint 1 is input-only */
2553 endpoints[1].out_cables = 0;
2554 break;
2555 case QUIRK_MIDI_FTDI:
2556 umidi->usb_protocol_ops = &snd_usbmidi_ftdi_ops;
2557
2558 /* set baud rate to 31250 (48 MHz / 16 / 96) */
2559 err = usb_control_msg(umidi->dev, usb_sndctrlpipe(umidi->dev, 0),
2560 3, 0x40, 0x60, 0, NULL, 0, 1000);
2561 if (err < 0)
2562 break;
2563
2564 err = snd_usbmidi_detect_per_port_endpoints(umidi, endpoints);
2565 break;
2566 case QUIRK_MIDI_CH345:
2567 umidi->usb_protocol_ops = &snd_usbmidi_ch345_broken_sysex_ops;
2568 err = snd_usbmidi_detect_per_port_endpoints(umidi, endpoints);
2569 break;
2570 default:
2571 dev_err(&umidi->dev->dev, "invalid quirk type %d\n",
2572 quirk->type);
2573 err = -ENXIO;
2574 break;
2575 }
2576 if (err < 0)
2577 goto free_midi;
2578
2579 /* create rawmidi device */
2580 out_ports = 0;
2581 in_ports = 0;
2582 for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i) {
2583 out_ports += hweight16(endpoints[i].out_cables);
2584 in_ports += hweight16(endpoints[i].in_cables);
2585 }
2586 err = snd_usbmidi_create_rawmidi(umidi, out_ports, in_ports);
2587 if (err < 0)
2588 goto free_midi;
2589
2590 /* create endpoint/port structures */
2591 if (quirk && quirk->type == QUIRK_MIDI_MIDIMAN)
2592 err = snd_usbmidi_create_endpoints_midiman(umidi, &endpoints[0]);
2593 else
2594 err = snd_usbmidi_create_endpoints(umidi, endpoints);
2595 if (err < 0)
2596 goto exit;
2597
2598 usb_autopm_get_interface_no_resume(umidi->iface);
2599
2600 list_add_tail(&umidi->list, midi_list);
2601 if (num_rawmidis)
2602 *num_rawmidis = umidi->next_midi_device;
2603 return 0;
2604
2605 free_midi:
2606 kfree(umidi);
2607 exit:
2608 return err;
2609 }
2610 EXPORT_SYMBOL(__snd_usbmidi_create);
2611