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bnx2x: Move common function into aggregated function
[pohmelfs.git] / sound / usb / midi.c
blobb9c2bc65f51ae7bd24da9adfaf8b62c241c2846f
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
51 #include <sound/core.h>
52 #include <sound/control.h>
53 #include <sound/rawmidi.h>
54 #include <sound/asequencer.h>
55 #include "usbaudio.h"
56 #include "midi.h"
57 #include "helper.h"
58
59 /*
60 * define this to log all USB packets
61 */
62 /* #define DUMP_PACKETS */
63
64 /*
65 * how long to wait after some USB errors, so that khubd can disconnect() us
66 * without too many spurious errors
67 */
68 #define ERROR_DELAY_JIFFIES (HZ / 10)
69
70 #define OUTPUT_URBS 7
71 #define INPUT_URBS 7
72
73
74 MODULE_AUTHOR("Clemens Ladisch <clemens@ladisch.de>");
75 MODULE_DESCRIPTION("USB Audio/MIDI helper module");
76 MODULE_LICENSE("Dual BSD/GPL");
77
78
79 struct usb_ms_header_descriptor {
80 __u8 bLength;
81 __u8 bDescriptorType;
82 __u8 bDescriptorSubtype;
83 __u8 bcdMSC[2];
84 __le16 wTotalLength;
85 } __attribute__ ((packed));
86
87 struct usb_ms_endpoint_descriptor {
88 __u8 bLength;
89 __u8 bDescriptorType;
90 __u8 bDescriptorSubtype;
91 __u8 bNumEmbMIDIJack;
92 __u8 baAssocJackID[0];
93 } __attribute__ ((packed));
94
95 struct snd_usb_midi_in_endpoint;
96 struct snd_usb_midi_out_endpoint;
97 struct snd_usb_midi_endpoint;
98
99 struct usb_protocol_ops {
100 void (*input)(struct snd_usb_midi_in_endpoint*, uint8_t*, int);
101 void (*output)(struct snd_usb_midi_out_endpoint *ep, struct urb *urb);
102 void (*output_packet)(struct urb*, uint8_t, uint8_t, uint8_t, uint8_t);
103 void (*init_out_endpoint)(struct snd_usb_midi_out_endpoint*);
104 void (*finish_out_endpoint)(struct snd_usb_midi_out_endpoint*);
105 };
106
107 struct snd_usb_midi {
108 struct usb_device *dev;
109 struct snd_card *card;
110 struct usb_interface *iface;
111 const struct snd_usb_audio_quirk *quirk;
112 struct snd_rawmidi *rmidi;
113 struct usb_protocol_ops* usb_protocol_ops;
114 struct list_head list;
115 struct timer_list error_timer;
116 spinlock_t disc_lock;
117 struct mutex mutex;
118 u32 usb_id;
119 int next_midi_device;
120
121 struct snd_usb_midi_endpoint {
122 struct snd_usb_midi_out_endpoint *out;
123 struct snd_usb_midi_in_endpoint *in;
124 } endpoints[MIDI_MAX_ENDPOINTS];
125 unsigned long input_triggered;
126 unsigned int opened;
127 unsigned char disconnected;
128
129 struct snd_kcontrol *roland_load_ctl;
130 };
131
132 struct snd_usb_midi_out_endpoint {
133 struct snd_usb_midi* umidi;
134 struct out_urb_context {
135 struct urb *urb;
136 struct snd_usb_midi_out_endpoint *ep;
137 } urbs[OUTPUT_URBS];
138 unsigned int active_urbs;
139 unsigned int drain_urbs;
140 int max_transfer; /* size of urb buffer */
141 struct tasklet_struct tasklet;
142 unsigned int next_urb;
143 spinlock_t buffer_lock;
144
145 struct usbmidi_out_port {
146 struct snd_usb_midi_out_endpoint* ep;
147 struct snd_rawmidi_substream *substream;
148 int active;
149 uint8_t cable; /* cable number << 4 */
150 uint8_t state;
151 #define STATE_UNKNOWN 0
152 #define STATE_1PARAM 1
153 #define STATE_2PARAM_1 2
154 #define STATE_2PARAM_2 3
155 #define STATE_SYSEX_0 4
156 #define STATE_SYSEX_1 5
157 #define STATE_SYSEX_2 6
158 uint8_t data[2];
159 } ports[0x10];
160 int current_port;
161
162 wait_queue_head_t drain_wait;
163 };
164
165 struct snd_usb_midi_in_endpoint {
166 struct snd_usb_midi* umidi;
167 struct urb* urbs[INPUT_URBS];
168 struct usbmidi_in_port {
169 struct snd_rawmidi_substream *substream;
170 u8 running_status_length;
171 } ports[0x10];
172 u8 seen_f5;
173 u8 error_resubmit;
174 int current_port;
175 };
176
177 static void snd_usbmidi_do_output(struct snd_usb_midi_out_endpoint* ep);
178
179 static const uint8_t snd_usbmidi_cin_length[] = {
180 0, 0, 2, 3, 3, 1, 2, 3, 3, 3, 3, 3, 2, 2, 3, 1
181 };
182
183 /*
184 * Submits the URB, with error handling.
185 */
186 static int snd_usbmidi_submit_urb(struct urb* urb, gfp_t flags)
187 {
188 int err = usb_submit_urb(urb, flags);
189 if (err < 0 && err != -ENODEV)
190 snd_printk(KERN_ERR "usb_submit_urb: %d\n", err);
191 return err;
192 }
193
194 /*
195 * Error handling for URB completion functions.
196 */
197 static int snd_usbmidi_urb_error(int status)
198 {
199 switch (status) {
200 /* manually unlinked, or device gone */
201 case -ENOENT:
202 case -ECONNRESET:
203 case -ESHUTDOWN:
204 case -ENODEV:
205 return -ENODEV;
206 /* errors that might occur during unplugging */
207 case -EPROTO:
208 case -ETIME:
209 case -EILSEQ:
210 return -EIO;
211 default:
212 snd_printk(KERN_ERR "urb status %d\n", status);
213 return 0; /* continue */
214 }
215 }
216
217 /*
218 * Receives a chunk of MIDI data.
219 */
220 static void snd_usbmidi_input_data(struct snd_usb_midi_in_endpoint* ep, int portidx,
221 uint8_t* data, int length)
222 {
223 struct usbmidi_in_port* port = &ep->ports[portidx];
224
225 if (!port->substream) {
226 snd_printd("unexpected port %d!\n", portidx);
227 return;
228 }
229 if (!test_bit(port->substream->number, &ep->umidi->input_triggered))
230 return;
231 snd_rawmidi_receive(port->substream, data, length);
232 }
233
234 #ifdef DUMP_PACKETS
235 static void dump_urb(const char *type, const u8 *data, int length)
236 {
237 snd_printk(KERN_DEBUG "%s packet: [", type);
238 for (; length > 0; ++data, --length)
239 printk(" %02x", *data);
240 printk(" ]\n");
241 }
242 #else
243 #define dump_urb(type, data, length) /* nothing */
244 #endif
245
246 /*
247 * Processes the data read from the device.
248 */
249 static void snd_usbmidi_in_urb_complete(struct urb* urb)
250 {
251 struct snd_usb_midi_in_endpoint* ep = urb->context;
252
253 if (urb->status == 0) {
254 dump_urb("received", urb->transfer_buffer, urb->actual_length);
255 ep->umidi->usb_protocol_ops->input(ep, urb->transfer_buffer,
256 urb->actual_length);
257 } else {
258 int err = snd_usbmidi_urb_error(urb->status);
259 if (err < 0) {
260 if (err != -ENODEV) {
261 ep->error_resubmit = 1;
262 mod_timer(&ep->umidi->error_timer,
263 jiffies + ERROR_DELAY_JIFFIES);
264 }
265 return;
266 }
267 }
268
269 urb->dev = ep->umidi->dev;
270 snd_usbmidi_submit_urb(urb, GFP_ATOMIC);
271 }
272
273 static void snd_usbmidi_out_urb_complete(struct urb* urb)
274 {
275 struct out_urb_context *context = urb->context;
276 struct snd_usb_midi_out_endpoint* ep = context->ep;
277 unsigned int urb_index;
278
279 spin_lock(&ep->buffer_lock);
280 urb_index = context - ep->urbs;
281 ep->active_urbs &= ~(1 << urb_index);
282 if (unlikely(ep->drain_urbs)) {
283 ep->drain_urbs &= ~(1 << urb_index);
284 wake_up(&ep->drain_wait);
285 }
286 spin_unlock(&ep->buffer_lock);
287 if (urb->status < 0) {
288 int err = snd_usbmidi_urb_error(urb->status);
289 if (err < 0) {
290 if (err != -ENODEV)
291 mod_timer(&ep->umidi->error_timer,
292 jiffies + ERROR_DELAY_JIFFIES);
293 return;
294 }
295 }
296 snd_usbmidi_do_output(ep);
297 }
298
299 /*
300 * This is called when some data should be transferred to the device
301 * (from one or more substreams).
302 */
303 static void snd_usbmidi_do_output(struct snd_usb_midi_out_endpoint* ep)
304 {
305 unsigned int urb_index;
306 struct urb* urb;
307 unsigned long flags;
308
309 spin_lock_irqsave(&ep->buffer_lock, flags);
310 if (ep->umidi->disconnected) {
311 spin_unlock_irqrestore(&ep->buffer_lock, flags);
312 return;
313 }
314
315 urb_index = ep->next_urb;
316 for (;;) {
317 if (!(ep->active_urbs & (1 << urb_index))) {
318 urb = ep->urbs[urb_index].urb;
319 urb->transfer_buffer_length = 0;
320 ep->umidi->usb_protocol_ops->output(ep, urb);
321 if (urb->transfer_buffer_length == 0)
322 break;
323
324 dump_urb("sending", urb->transfer_buffer,
325 urb->transfer_buffer_length);
326 urb->dev = ep->umidi->dev;
327 if (snd_usbmidi_submit_urb(urb, GFP_ATOMIC) < 0)
328 break;
329 ep->active_urbs |= 1 << urb_index;
330 }
331 if (++urb_index >= OUTPUT_URBS)
332 urb_index = 0;
333 if (urb_index == ep->next_urb)
334 break;
335 }
336 ep->next_urb = urb_index;
337 spin_unlock_irqrestore(&ep->buffer_lock, flags);
338 }
339
340 static void snd_usbmidi_out_tasklet(unsigned long data)
341 {
342 struct snd_usb_midi_out_endpoint* ep = (struct snd_usb_midi_out_endpoint *) data;
343
344 snd_usbmidi_do_output(ep);
345 }
346
347 /* called after transfers had been interrupted due to some USB error */
348 static void snd_usbmidi_error_timer(unsigned long data)
349 {
350 struct snd_usb_midi *umidi = (struct snd_usb_midi *)data;
351 unsigned int i, j;
352
353 spin_lock(&umidi->disc_lock);
354 if (umidi->disconnected) {
355 spin_unlock(&umidi->disc_lock);
356 return;
357 }
358 for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i) {
359 struct snd_usb_midi_in_endpoint *in = umidi->endpoints[i].in;
360 if (in && in->error_resubmit) {
361 in->error_resubmit = 0;
362 for (j = 0; j < INPUT_URBS; ++j) {
363 in->urbs[j]->dev = umidi->dev;
364 snd_usbmidi_submit_urb(in->urbs[j], GFP_ATOMIC);
365 }
366 }
367 if (umidi->endpoints[i].out)
368 snd_usbmidi_do_output(umidi->endpoints[i].out);
369 }
370 spin_unlock(&umidi->disc_lock);
371 }
372
373 /* helper function to send static data that may not DMA-able */
374 static int send_bulk_static_data(struct snd_usb_midi_out_endpoint* ep,
375 const void *data, int len)
376 {
377 int err = 0;
378 void *buf = kmemdup(data, len, GFP_KERNEL);
379 if (!buf)
380 return -ENOMEM;
381 dump_urb("sending", buf, len);
382 if (ep->urbs[0].urb)
383 err = usb_bulk_msg(ep->umidi->dev, ep->urbs[0].urb->pipe,
384 buf, len, NULL, 250);
385 kfree(buf);
386 return err;
387 }
388
389 /*
390 * Standard USB MIDI protocol: see the spec.
391 * Midiman protocol: like the standard protocol, but the control byte is the
392 * fourth byte in each packet, and uses length instead of CIN.
393 */
394
395 static void snd_usbmidi_standard_input(struct snd_usb_midi_in_endpoint* ep,
396 uint8_t* buffer, int buffer_length)
397 {
398 int i;
399
400 for (i = 0; i + 3 < buffer_length; i += 4)
401 if (buffer[i] != 0) {
402 int cable = buffer[i] >> 4;
403 int length = snd_usbmidi_cin_length[buffer[i] & 0x0f];
404 snd_usbmidi_input_data(ep, cable, &buffer[i + 1], length);
405 }
406 }
407
408 static void snd_usbmidi_midiman_input(struct snd_usb_midi_in_endpoint* ep,
409 uint8_t* buffer, int buffer_length)
410 {
411 int i;
412
413 for (i = 0; i + 3 < buffer_length; i += 4)
414 if (buffer[i + 3] != 0) {
415 int port = buffer[i + 3] >> 4;
416 int length = buffer[i + 3] & 3;
417 snd_usbmidi_input_data(ep, port, &buffer[i], length);
418 }
419 }
420
421 /*
422 * Buggy M-Audio device: running status on input results in a packet that has
423 * the data bytes but not the status byte and that is marked with CIN 4.
424 */
425 static void snd_usbmidi_maudio_broken_running_status_input(
426 struct snd_usb_midi_in_endpoint* ep,
427 uint8_t* buffer, int buffer_length)
428 {
429 int i;
430
431 for (i = 0; i + 3 < buffer_length; i += 4)
432 if (buffer[i] != 0) {
433 int cable = buffer[i] >> 4;
434 u8 cin = buffer[i] & 0x0f;
435 struct usbmidi_in_port *port = &ep->ports[cable];
436 int length;
437
438 length = snd_usbmidi_cin_length[cin];
439 if (cin == 0xf && buffer[i + 1] >= 0xf8)
440 ; /* realtime msg: no running status change */
441 else if (cin >= 0x8 && cin <= 0xe)
442 /* channel msg */
443 port->running_status_length = length - 1;
444 else if (cin == 0x4 &&
445 port->running_status_length != 0 &&
446 buffer[i + 1] < 0x80)
447 /* CIN 4 that is not a SysEx */
448 length = port->running_status_length;
449 else
450 /*
451 * All other msgs cannot begin running status.
452 * (A channel msg sent as two or three CIN 0xF
453 * packets could in theory, but this device
454 * doesn't use this format.)
455 */
456 port->running_status_length = 0;
457 snd_usbmidi_input_data(ep, cable, &buffer[i + 1], length);
458 }
459 }
460
461 /*
462 * CME protocol: like the standard protocol, but SysEx commands are sent as a
463 * single USB packet preceded by a 0x0F byte.
464 */
465 static void snd_usbmidi_cme_input(struct snd_usb_midi_in_endpoint *ep,
466 uint8_t *buffer, int buffer_length)
467 {
468 if (buffer_length < 2 || (buffer[0] & 0x0f) != 0x0f)
469 snd_usbmidi_standard_input(ep, buffer, buffer_length);
470 else
471 snd_usbmidi_input_data(ep, buffer[0] >> 4,
472 &buffer[1], buffer_length - 1);
473 }
474
475 /*
476 * Adds one USB MIDI packet to the output buffer.
477 */
478 static void snd_usbmidi_output_standard_packet(struct urb* urb, uint8_t p0,
479 uint8_t p1, uint8_t p2, uint8_t p3)
480 {
481
482 uint8_t* buf = (uint8_t*)urb->transfer_buffer + urb->transfer_buffer_length;
483 buf[0] = p0;
484 buf[1] = p1;
485 buf[2] = p2;
486 buf[3] = p3;
487 urb->transfer_buffer_length += 4;
488 }
489
490 /*
491 * Adds one Midiman packet to the output buffer.
492 */
493 static void snd_usbmidi_output_midiman_packet(struct urb* urb, uint8_t p0,
494 uint8_t p1, uint8_t p2, uint8_t p3)
495 {
496
497 uint8_t* buf = (uint8_t*)urb->transfer_buffer + urb->transfer_buffer_length;
498 buf[0] = p1;
499 buf[1] = p2;
500 buf[2] = p3;
501 buf[3] = (p0 & 0xf0) | snd_usbmidi_cin_length[p0 & 0x0f];
502 urb->transfer_buffer_length += 4;
503 }
504
505 /*
506 * Converts MIDI commands to USB MIDI packets.
507 */
508 static void snd_usbmidi_transmit_byte(struct usbmidi_out_port* port,
509 uint8_t b, struct urb* urb)
510 {
511 uint8_t p0 = port->cable;
512 void (*output_packet)(struct urb*, uint8_t, uint8_t, uint8_t, uint8_t) =
513 port->ep->umidi->usb_protocol_ops->output_packet;
514
515 if (b >= 0xf8) {
516 output_packet(urb, p0 | 0x0f, b, 0, 0);
517 } else if (b >= 0xf0) {
518 switch (b) {
519 case 0xf0:
520 port->data[0] = b;
521 port->state = STATE_SYSEX_1;
522 break;
523 case 0xf1:
524 case 0xf3:
525 port->data[0] = b;
526 port->state = STATE_1PARAM;
527 break;
528 case 0xf2:
529 port->data[0] = b;
530 port->state = STATE_2PARAM_1;
531 break;
532 case 0xf4:
533 case 0xf5:
534 port->state = STATE_UNKNOWN;
535 break;
536 case 0xf6:
537 output_packet(urb, p0 | 0x05, 0xf6, 0, 0);
538 port->state = STATE_UNKNOWN;
539 break;
540 case 0xf7:
541 switch (port->state) {
542 case STATE_SYSEX_0:
543 output_packet(urb, p0 | 0x05, 0xf7, 0, 0);
544 break;
545 case STATE_SYSEX_1:
546 output_packet(urb, p0 | 0x06, port->data[0], 0xf7, 0);
547 break;
548 case STATE_SYSEX_2:
549 output_packet(urb, p0 | 0x07, port->data[0], port->data[1], 0xf7);
550 break;
551 }
552 port->state = STATE_UNKNOWN;
553 break;
554 }
555 } else if (b >= 0x80) {
556 port->data[0] = b;
557 if (b >= 0xc0 && b <= 0xdf)
558 port->state = STATE_1PARAM;
559 else
560 port->state = STATE_2PARAM_1;
561 } else { /* b < 0x80 */
562 switch (port->state) {
563 case STATE_1PARAM:
564 if (port->data[0] < 0xf0) {
565 p0 |= port->data[0] >> 4;
566 } else {
567 p0 |= 0x02;
568 port->state = STATE_UNKNOWN;
569 }
570 output_packet(urb, p0, port->data[0], b, 0);
571 break;
572 case STATE_2PARAM_1:
573 port->data[1] = b;
574 port->state = STATE_2PARAM_2;
575 break;
576 case STATE_2PARAM_2:
577 if (port->data[0] < 0xf0) {
578 p0 |= port->data[0] >> 4;
579 port->state = STATE_2PARAM_1;
580 } else {
581 p0 |= 0x03;
582 port->state = STATE_UNKNOWN;
583 }
584 output_packet(urb, p0, port->data[0], port->data[1], b);
585 break;
586 case STATE_SYSEX_0:
587 port->data[0] = b;
588 port->state = STATE_SYSEX_1;
589 break;
590 case STATE_SYSEX_1:
591 port->data[1] = b;
592 port->state = STATE_SYSEX_2;
593 break;
594 case STATE_SYSEX_2:
595 output_packet(urb, p0 | 0x04, port->data[0], port->data[1], b);
596 port->state = STATE_SYSEX_0;
597 break;
598 }
599 }
600 }
601
602 static void snd_usbmidi_standard_output(struct snd_usb_midi_out_endpoint* ep,
603 struct urb *urb)
604 {
605 int p;
606
607 /* FIXME: lower-numbered ports can starve higher-numbered ports */
608 for (p = 0; p < 0x10; ++p) {
609 struct usbmidi_out_port* port = &ep->ports[p];
610 if (!port->active)
611 continue;
612 while (urb->transfer_buffer_length + 3 < ep->max_transfer) {
613 uint8_t b;
614 if (snd_rawmidi_transmit(port->substream, &b, 1) != 1) {
615 port->active = 0;
616 break;
617 }
618 snd_usbmidi_transmit_byte(port, b, urb);
619 }
620 }
621 }
622
623 static struct usb_protocol_ops snd_usbmidi_standard_ops = {
624 .input = snd_usbmidi_standard_input,
625 .output = snd_usbmidi_standard_output,
626 .output_packet = snd_usbmidi_output_standard_packet,
627 };
628
629 static struct usb_protocol_ops snd_usbmidi_midiman_ops = {
630 .input = snd_usbmidi_midiman_input,
631 .output = snd_usbmidi_standard_output,
632 .output_packet = snd_usbmidi_output_midiman_packet,
633 };
634
635 static struct usb_protocol_ops snd_usbmidi_maudio_broken_running_status_ops = {
636 .input = snd_usbmidi_maudio_broken_running_status_input,
637 .output = snd_usbmidi_standard_output,
638 .output_packet = snd_usbmidi_output_standard_packet,
639 };
640
641 static struct usb_protocol_ops snd_usbmidi_cme_ops = {
642 .input = snd_usbmidi_cme_input,
643 .output = snd_usbmidi_standard_output,
644 .output_packet = snd_usbmidi_output_standard_packet,
645 };
646
647 /*
648 * AKAI MPD16 protocol:
649 *
650 * For control port (endpoint 1):
651 * ==============================
652 * One or more chunks consisting of first byte of (0x10 | msg_len) and then a
653 * SysEx message (msg_len=9 bytes long).
654 *
655 * For data port (endpoint 2):
656 * ===========================
657 * One or more chunks consisting of first byte of (0x20 | msg_len) and then a
658 * MIDI message (msg_len bytes long)
659 *
660 * Messages sent: Active Sense, Note On, Poly Pressure, Control Change.
661 */
662 static void snd_usbmidi_akai_input(struct snd_usb_midi_in_endpoint *ep,
663 uint8_t *buffer, int buffer_length)
664 {
665 unsigned int pos = 0;
666 unsigned int len = (unsigned int)buffer_length;
667 while (pos < len) {
668 unsigned int port = (buffer[pos] >> 4) - 1;
669 unsigned int msg_len = buffer[pos] & 0x0f;
670 pos++;
671 if (pos + msg_len <= len && port < 2)
672 snd_usbmidi_input_data(ep, 0, &buffer[pos], msg_len);
673 pos += msg_len;
674 }
675 }
676
677 #define MAX_AKAI_SYSEX_LEN 9
678
679 static void snd_usbmidi_akai_output(struct snd_usb_midi_out_endpoint *ep,
680 struct urb *urb)
681 {
682 uint8_t *msg;
683 int pos, end, count, buf_end;
684 uint8_t tmp[MAX_AKAI_SYSEX_LEN];
685 struct snd_rawmidi_substream *substream = ep->ports[0].substream;
686
687 if (!ep->ports[0].active)
688 return;
689
690 msg = urb->transfer_buffer + urb->transfer_buffer_length;
691 buf_end = ep->max_transfer - MAX_AKAI_SYSEX_LEN - 1;
692
693 /* only try adding more data when there's space for at least 1 SysEx */
694 while (urb->transfer_buffer_length < buf_end) {
695 count = snd_rawmidi_transmit_peek(substream,
696 tmp, MAX_AKAI_SYSEX_LEN);
697 if (!count) {
698 ep->ports[0].active = 0;
699 return;
700 }
701 /* try to skip non-SysEx data */
702 for (pos = 0; pos < count && tmp[pos] != 0xF0; pos++)
703 ;
704
705 if (pos > 0) {
706 snd_rawmidi_transmit_ack(substream, pos);
707 continue;
708 }
709
710 /* look for the start or end marker */
711 for (end = 1; end < count && tmp[end] < 0xF0; end++)
712 ;
713
714 /* next SysEx started before the end of current one */
715 if (end < count && tmp[end] == 0xF0) {
716 /* it's incomplete - drop it */
717 snd_rawmidi_transmit_ack(substream, end);
718 continue;
719 }
720 /* SysEx complete */
721 if (end < count && tmp[end] == 0xF7) {
722 /* queue it, ack it, and get the next one */
723 count = end + 1;
724 msg[0] = 0x10 | count;
725 memcpy(&msg[1], tmp, count);
726 snd_rawmidi_transmit_ack(substream, count);
727 urb->transfer_buffer_length += count + 1;
728 msg += count + 1;
729 continue;
730 }
731 /* less than 9 bytes and no end byte - wait for more */
732 if (count < MAX_AKAI_SYSEX_LEN) {
733 ep->ports[0].active = 0;
734 return;
735 }
736 /* 9 bytes and no end marker in sight - malformed, skip it */
737 snd_rawmidi_transmit_ack(substream, count);
738 }
739 }
740
741 static struct usb_protocol_ops snd_usbmidi_akai_ops = {
742 .input = snd_usbmidi_akai_input,
743 .output = snd_usbmidi_akai_output,
744 };
745
746 /*
747 * Novation USB MIDI protocol: number of data bytes is in the first byte
748 * (when receiving) (+1!) or in the second byte (when sending); data begins
749 * at the third byte.
750 */
751
752 static void snd_usbmidi_novation_input(struct snd_usb_midi_in_endpoint* ep,
753 uint8_t* buffer, int buffer_length)
754 {
755 if (buffer_length < 2 || !buffer[0] || buffer_length < buffer[0] + 1)
756 return;
757 snd_usbmidi_input_data(ep, 0, &buffer[2], buffer[0] - 1);
758 }
759
760 static void snd_usbmidi_novation_output(struct snd_usb_midi_out_endpoint* ep,
761 struct urb *urb)
762 {
763 uint8_t* transfer_buffer;
764 int count;
765
766 if (!ep->ports[0].active)
767 return;
768 transfer_buffer = urb->transfer_buffer;
769 count = snd_rawmidi_transmit(ep->ports[0].substream,
770 &transfer_buffer[2],
771 ep->max_transfer - 2);
772 if (count < 1) {
773 ep->ports[0].active = 0;
774 return;
775 }
776 transfer_buffer[0] = 0;
777 transfer_buffer[1] = count;
778 urb->transfer_buffer_length = 2 + count;
779 }
780
781 static struct usb_protocol_ops snd_usbmidi_novation_ops = {
782 .input = snd_usbmidi_novation_input,
783 .output = snd_usbmidi_novation_output,
784 };
785
786 /*
787 * "raw" protocol: used by the MOTU FastLane.
788 */
789
790 static void snd_usbmidi_raw_input(struct snd_usb_midi_in_endpoint* ep,
791 uint8_t* buffer, int buffer_length)
792 {
793 snd_usbmidi_input_data(ep, 0, buffer, buffer_length);
794 }
795
796 static void snd_usbmidi_raw_output(struct snd_usb_midi_out_endpoint* ep,
797 struct urb *urb)
798 {
799 int count;
800
801 if (!ep->ports[0].active)
802 return;
803 count = snd_rawmidi_transmit(ep->ports[0].substream,
804 urb->transfer_buffer,
805 ep->max_transfer);
806 if (count < 1) {
807 ep->ports[0].active = 0;
808 return;
809 }
810 urb->transfer_buffer_length = count;
811 }
812
813 static struct usb_protocol_ops snd_usbmidi_raw_ops = {
814 .input = snd_usbmidi_raw_input,
815 .output = snd_usbmidi_raw_output,
816 };
817
818 static void snd_usbmidi_us122l_input(struct snd_usb_midi_in_endpoint *ep,
819 uint8_t *buffer, int buffer_length)
820 {
821 if (buffer_length != 9)
822 return;
823 buffer_length = 8;
824 while (buffer_length && buffer[buffer_length - 1] == 0xFD)
825 buffer_length--;
826 if (buffer_length)
827 snd_usbmidi_input_data(ep, 0, buffer, buffer_length);
828 }
829
830 static void snd_usbmidi_us122l_output(struct snd_usb_midi_out_endpoint *ep,
831 struct urb *urb)
832 {
833 int count;
834
835 if (!ep->ports[0].active)
836 return;
837 count = snd_usb_get_speed(ep->umidi->dev) == USB_SPEED_HIGH ? 1 : 2;
838 count = snd_rawmidi_transmit(ep->ports[0].substream,
839 urb->transfer_buffer,
840 count);
841 if (count < 1) {
842 ep->ports[0].active = 0;
843 return;
844 }
845
846 memset(urb->transfer_buffer + count, 0xFD, 9 - count);
847 urb->transfer_buffer_length = count;
848 }
849
850 static struct usb_protocol_ops snd_usbmidi_122l_ops = {
851 .input = snd_usbmidi_us122l_input,
852 .output = snd_usbmidi_us122l_output,
853 };
854
855 /*
856 * Emagic USB MIDI protocol: raw MIDI with "F5 xx" port switching.
857 */
858
859 static void snd_usbmidi_emagic_init_out(struct snd_usb_midi_out_endpoint* ep)
860 {
861 static const u8 init_data[] = {
862 /* initialization magic: "get version" */
863 0xf0,
864 0x00, 0x20, 0x31, /* Emagic */
865 0x64, /* Unitor8 */
866 0x0b, /* version number request */
867 0x00, /* command version */
868 0x00, /* EEPROM, box 0 */
869 0xf7
870 };
871 send_bulk_static_data(ep, init_data, sizeof(init_data));
872 /* while we're at it, pour on more magic */
873 send_bulk_static_data(ep, init_data, sizeof(init_data));
874 }
875
876 static void snd_usbmidi_emagic_finish_out(struct snd_usb_midi_out_endpoint* ep)
877 {
878 static const u8 finish_data[] = {
879 /* switch to patch mode with last preset */
880 0xf0,
881 0x00, 0x20, 0x31, /* Emagic */
882 0x64, /* Unitor8 */
883 0x10, /* patch switch command */
884 0x00, /* command version */
885 0x7f, /* to all boxes */
886 0x40, /* last preset in EEPROM */
887 0xf7
888 };
889 send_bulk_static_data(ep, finish_data, sizeof(finish_data));
890 }
891
892 static void snd_usbmidi_emagic_input(struct snd_usb_midi_in_endpoint* ep,
893 uint8_t* buffer, int buffer_length)
894 {
895 int i;
896
897 /* FF indicates end of valid data */
898 for (i = 0; i < buffer_length; ++i)
899 if (buffer[i] == 0xff) {
900 buffer_length = i;
901 break;
902 }
903
904 /* handle F5 at end of last buffer */
905 if (ep->seen_f5)
906 goto switch_port;
907
908 while (buffer_length > 0) {
909 /* determine size of data until next F5 */
910 for (i = 0; i < buffer_length; ++i)
911 if (buffer[i] == 0xf5)
912 break;
913 snd_usbmidi_input_data(ep, ep->current_port, buffer, i);
914 buffer += i;
915 buffer_length -= i;
916
917 if (buffer_length <= 0)
918 break;
919 /* assert(buffer[0] == 0xf5); */
920 ep->seen_f5 = 1;
921 ++buffer;
922 --buffer_length;
923
924 switch_port:
925 if (buffer_length <= 0)
926 break;
927 if (buffer[0] < 0x80) {
928 ep->current_port = (buffer[0] - 1) & 15;
929 ++buffer;
930 --buffer_length;
931 }
932 ep->seen_f5 = 0;
933 }
934 }
935
936 static void snd_usbmidi_emagic_output(struct snd_usb_midi_out_endpoint* ep,
937 struct urb *urb)
938 {
939 int port0 = ep->current_port;
940 uint8_t* buf = urb->transfer_buffer;
941 int buf_free = ep->max_transfer;
942 int length, i;
943
944 for (i = 0; i < 0x10; ++i) {
945 /* round-robin, starting at the last current port */
946 int portnum = (port0 + i) & 15;
947 struct usbmidi_out_port* port = &ep->ports[portnum];
948
949 if (!port->active)
950 continue;
951 if (snd_rawmidi_transmit_peek(port->substream, buf, 1) != 1) {
952 port->active = 0;
953 continue;
954 }
955
956 if (portnum != ep->current_port) {
957 if (buf_free < 2)
958 break;
959 ep->current_port = portnum;
960 buf[0] = 0xf5;
961 buf[1] = (portnum + 1) & 15;
962 buf += 2;
963 buf_free -= 2;
964 }
965
966 if (buf_free < 1)
967 break;
968 length = snd_rawmidi_transmit(port->substream, buf, buf_free);
969 if (length > 0) {
970 buf += length;
971 buf_free -= length;
972 if (buf_free < 1)
973 break;
974 }
975 }
976 if (buf_free < ep->max_transfer && buf_free > 0) {
977 *buf = 0xff;
978 --buf_free;
979 }
980 urb->transfer_buffer_length = ep->max_transfer - buf_free;
981 }
982
983 static struct usb_protocol_ops snd_usbmidi_emagic_ops = {
984 .input = snd_usbmidi_emagic_input,
985 .output = snd_usbmidi_emagic_output,
986 .init_out_endpoint = snd_usbmidi_emagic_init_out,
987 .finish_out_endpoint = snd_usbmidi_emagic_finish_out,
988 };
989
990
991 static void update_roland_altsetting(struct snd_usb_midi* umidi)
992 {
993 struct usb_interface *intf;
994 struct usb_host_interface *hostif;
995 struct usb_interface_descriptor *intfd;
996 int is_light_load;
997
998 intf = umidi->iface;
999 is_light_load = intf->cur_altsetting != intf->altsetting;
1000 if (umidi->roland_load_ctl->private_value == is_light_load)
1001 return;
1002 hostif = &intf->altsetting[umidi->roland_load_ctl->private_value];
1003 intfd = get_iface_desc(hostif);
1004 snd_usbmidi_input_stop(&umidi->list);
1005 usb_set_interface(umidi->dev, intfd->bInterfaceNumber,
1006 intfd->bAlternateSetting);
1007 snd_usbmidi_input_start(&umidi->list);
1008 }
1009
1010 static void substream_open(struct snd_rawmidi_substream *substream, int open)
1011 {
1012 struct snd_usb_midi* umidi = substream->rmidi->private_data;
1013 struct snd_kcontrol *ctl;
1014
1015 mutex_lock(&umidi->mutex);
1016 if (open) {
1017 if (umidi->opened++ == 0 && umidi->roland_load_ctl) {
1018 ctl = umidi->roland_load_ctl;
1019 ctl->vd[0].access |= SNDRV_CTL_ELEM_ACCESS_INACTIVE;
1020 snd_ctl_notify(umidi->card,
1021 SNDRV_CTL_EVENT_MASK_INFO, &ctl->id);
1022 update_roland_altsetting(umidi);
1023 }
1024 } else {
1025 if (--umidi->opened == 0 && umidi->roland_load_ctl) {
1026 ctl = umidi->roland_load_ctl;
1027 ctl->vd[0].access &= ~SNDRV_CTL_ELEM_ACCESS_INACTIVE;
1028 snd_ctl_notify(umidi->card,
1029 SNDRV_CTL_EVENT_MASK_INFO, &ctl->id);
1030 }
1031 }
1032 mutex_unlock(&umidi->mutex);
1033 }
1034
1035 static int snd_usbmidi_output_open(struct snd_rawmidi_substream *substream)
1036 {
1037 struct snd_usb_midi* umidi = substream->rmidi->private_data;
1038 struct usbmidi_out_port* port = NULL;
1039 int i, j;
1040
1041 for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i)
1042 if (umidi->endpoints[i].out)
1043 for (j = 0; j < 0x10; ++j)
1044 if (umidi->endpoints[i].out->ports[j].substream == substream) {
1045 port = &umidi->endpoints[i].out->ports[j];
1046 break;
1047 }
1048 if (!port) {
1049 snd_BUG();
1050 return -ENXIO;
1051 }
1052 substream->runtime->private_data = port;
1053 port->state = STATE_UNKNOWN;
1054 substream_open(substream, 1);
1055 return 0;
1056 }
1057
1058 static int snd_usbmidi_output_close(struct snd_rawmidi_substream *substream)
1059 {
1060 substream_open(substream, 0);
1061 return 0;
1062 }
1063
1064 static void snd_usbmidi_output_trigger(struct snd_rawmidi_substream *substream, int up)
1065 {
1066 struct usbmidi_out_port* port = (struct usbmidi_out_port*)substream->runtime->private_data;
1067
1068 port->active = up;
1069 if (up) {
1070 if (port->ep->umidi->disconnected) {
1071 /* gobble up remaining bytes to prevent wait in
1072 * snd_rawmidi_drain_output */
1073 while (!snd_rawmidi_transmit_empty(substream))
1074 snd_rawmidi_transmit_ack(substream, 1);
1075 return;
1076 }
1077 tasklet_schedule(&port->ep->tasklet);
1078 }
1079 }
1080
1081 static void snd_usbmidi_output_drain(struct snd_rawmidi_substream *substream)
1082 {
1083 struct usbmidi_out_port* port = substream->runtime->private_data;
1084 struct snd_usb_midi_out_endpoint *ep = port->ep;
1085 unsigned int drain_urbs;
1086 DEFINE_WAIT(wait);
1087 long timeout = msecs_to_jiffies(50);
1088
1089 if (ep->umidi->disconnected)
1090 return;
1091 /*
1092 * The substream buffer is empty, but some data might still be in the
1093 * currently active URBs, so we have to wait for those to complete.
1094 */
1095 spin_lock_irq(&ep->buffer_lock);
1096 drain_urbs = ep->active_urbs;
1097 if (drain_urbs) {
1098 ep->drain_urbs |= drain_urbs;
1099 do {
1100 prepare_to_wait(&ep->drain_wait, &wait,
1101 TASK_UNINTERRUPTIBLE);
1102 spin_unlock_irq(&ep->buffer_lock);
1103 timeout = schedule_timeout(timeout);
1104 spin_lock_irq(&ep->buffer_lock);
1105 drain_urbs &= ep->drain_urbs;
1106 } while (drain_urbs && timeout);
1107 finish_wait(&ep->drain_wait, &wait);
1108 }
1109 spin_unlock_irq(&ep->buffer_lock);
1110 }
1111
1112 static int snd_usbmidi_input_open(struct snd_rawmidi_substream *substream)
1113 {
1114 substream_open(substream, 1);
1115 return 0;
1116 }
1117
1118 static int snd_usbmidi_input_close(struct snd_rawmidi_substream *substream)
1119 {
1120 substream_open(substream, 0);
1121 return 0;
1122 }
1123
1124 static void snd_usbmidi_input_trigger(struct snd_rawmidi_substream *substream, int up)
1125 {
1126 struct snd_usb_midi* umidi = substream->rmidi->private_data;
1127
1128 if (up)
1129 set_bit(substream->number, &umidi->input_triggered);
1130 else
1131 clear_bit(substream->number, &umidi->input_triggered);
1132 }
1133
1134 static struct snd_rawmidi_ops snd_usbmidi_output_ops = {
1135 .open = snd_usbmidi_output_open,
1136 .close = snd_usbmidi_output_close,
1137 .trigger = snd_usbmidi_output_trigger,
1138 .drain = snd_usbmidi_output_drain,
1139 };
1140
1141 static struct snd_rawmidi_ops snd_usbmidi_input_ops = {
1142 .open = snd_usbmidi_input_open,
1143 .close = snd_usbmidi_input_close,
1144 .trigger = snd_usbmidi_input_trigger
1145 };
1146
1147 static void free_urb_and_buffer(struct snd_usb_midi *umidi, struct urb *urb,
1148 unsigned int buffer_length)
1149 {
1150 usb_free_coherent(umidi->dev, buffer_length,
1151 urb->transfer_buffer, urb->transfer_dma);
1152 usb_free_urb(urb);
1153 }
1154
1155 /*
1156 * Frees an input endpoint.
1157 * May be called when ep hasn't been initialized completely.
1158 */
1159 static void snd_usbmidi_in_endpoint_delete(struct snd_usb_midi_in_endpoint* ep)
1160 {
1161 unsigned int i;
1162
1163 for (i = 0; i < INPUT_URBS; ++i)
1164 if (ep->urbs[i])
1165 free_urb_and_buffer(ep->umidi, ep->urbs[i],
1166 ep->urbs[i]->transfer_buffer_length);
1167 kfree(ep);
1168 }
1169
1170 /*
1171 * Creates an input endpoint.
1172 */
1173 static int snd_usbmidi_in_endpoint_create(struct snd_usb_midi* umidi,
1174 struct snd_usb_midi_endpoint_info* ep_info,
1175 struct snd_usb_midi_endpoint* rep)
1176 {
1177 struct snd_usb_midi_in_endpoint* ep;
1178 void* buffer;
1179 unsigned int pipe;
1180 int length;
1181 unsigned int i;
1182
1183 rep->in = NULL;
1184 ep = kzalloc(sizeof(*ep), GFP_KERNEL);
1185 if (!ep)
1186 return -ENOMEM;
1187 ep->umidi = umidi;
1188
1189 for (i = 0; i < INPUT_URBS; ++i) {
1190 ep->urbs[i] = usb_alloc_urb(0, GFP_KERNEL);
1191 if (!ep->urbs[i]) {
1192 snd_usbmidi_in_endpoint_delete(ep);
1193 return -ENOMEM;
1194 }
1195 }
1196 if (ep_info->in_interval)
1197 pipe = usb_rcvintpipe(umidi->dev, ep_info->in_ep);
1198 else
1199 pipe = usb_rcvbulkpipe(umidi->dev, ep_info->in_ep);
1200 length = usb_maxpacket(umidi->dev, pipe, 0);
1201 for (i = 0; i < INPUT_URBS; ++i) {
1202 buffer = usb_alloc_coherent(umidi->dev, length, GFP_KERNEL,
1203 &ep->urbs[i]->transfer_dma);
1204 if (!buffer) {
1205 snd_usbmidi_in_endpoint_delete(ep);
1206 return -ENOMEM;
1207 }
1208 if (ep_info->in_interval)
1209 usb_fill_int_urb(ep->urbs[i], umidi->dev,
1210 pipe, buffer, length,
1211 snd_usbmidi_in_urb_complete,
1212 ep, ep_info->in_interval);
1213 else
1214 usb_fill_bulk_urb(ep->urbs[i], umidi->dev,
1215 pipe, buffer, length,
1216 snd_usbmidi_in_urb_complete, ep);
1217 ep->urbs[i]->transfer_flags = URB_NO_TRANSFER_DMA_MAP;
1218 }
1219
1220 rep->in = ep;
1221 return 0;
1222 }
1223
1224 /*
1225 * Frees an output endpoint.
1226 * May be called when ep hasn't been initialized completely.
1227 */
1228 static void snd_usbmidi_out_endpoint_clear(struct snd_usb_midi_out_endpoint *ep)
1229 {
1230 unsigned int i;
1231
1232 for (i = 0; i < OUTPUT_URBS; ++i)
1233 if (ep->urbs[i].urb) {
1234 free_urb_and_buffer(ep->umidi, ep->urbs[i].urb,
1235 ep->max_transfer);
1236 ep->urbs[i].urb = NULL;
1237 }
1238 }
1239
1240 static void snd_usbmidi_out_endpoint_delete(struct snd_usb_midi_out_endpoint *ep)
1241 {
1242 snd_usbmidi_out_endpoint_clear(ep);
1243 kfree(ep);
1244 }
1245
1246 /*
1247 * Creates an output endpoint, and initializes output ports.
1248 */
1249 static int snd_usbmidi_out_endpoint_create(struct snd_usb_midi* umidi,
1250 struct snd_usb_midi_endpoint_info* ep_info,
1251 struct snd_usb_midi_endpoint* rep)
1252 {
1253 struct snd_usb_midi_out_endpoint* ep;
1254 unsigned int i;
1255 unsigned int pipe;
1256 void* buffer;
1257
1258 rep->out = NULL;
1259 ep = kzalloc(sizeof(*ep), GFP_KERNEL);
1260 if (!ep)
1261 return -ENOMEM;
1262 ep->umidi = umidi;
1263
1264 for (i = 0; i < OUTPUT_URBS; ++i) {
1265 ep->urbs[i].urb = usb_alloc_urb(0, GFP_KERNEL);
1266 if (!ep->urbs[i].urb) {
1267 snd_usbmidi_out_endpoint_delete(ep);
1268 return -ENOMEM;
1269 }
1270 ep->urbs[i].ep = ep;
1271 }
1272 if (ep_info->out_interval)
1273 pipe = usb_sndintpipe(umidi->dev, ep_info->out_ep);
1274 else
1275 pipe = usb_sndbulkpipe(umidi->dev, ep_info->out_ep);
1276 switch (umidi->usb_id) {
1277 default:
1278 ep->max_transfer = usb_maxpacket(umidi->dev, pipe, 1);
1279 break;
1280 /*
1281 * Various chips declare a packet size larger than 4 bytes, but
1282 * do not actually work with larger packets:
1283 */
1284 case USB_ID(0x0a92, 0x1020): /* ESI M4U */
1285 case USB_ID(0x1430, 0x474b): /* RedOctane GH MIDI INTERFACE */
1286 case USB_ID(0x15ca, 0x0101): /* Textech USB Midi Cable */
1287 case USB_ID(0x15ca, 0x1806): /* Textech USB Midi Cable */
1288 case USB_ID(0x1a86, 0x752d): /* QinHeng CH345 "USB2.0-MIDI" */
1289 ep->max_transfer = 4;
1290 break;
1291 }
1292 for (i = 0; i < OUTPUT_URBS; ++i) {
1293 buffer = usb_alloc_coherent(umidi->dev,
1294 ep->max_transfer, GFP_KERNEL,
1295 &ep->urbs[i].urb->transfer_dma);
1296 if (!buffer) {
1297 snd_usbmidi_out_endpoint_delete(ep);
1298 return -ENOMEM;
1299 }
1300 if (ep_info->out_interval)
1301 usb_fill_int_urb(ep->urbs[i].urb, umidi->dev,
1302 pipe, buffer, ep->max_transfer,
1303 snd_usbmidi_out_urb_complete,
1304 &ep->urbs[i], ep_info->out_interval);
1305 else
1306 usb_fill_bulk_urb(ep->urbs[i].urb, umidi->dev,
1307 pipe, buffer, ep->max_transfer,
1308 snd_usbmidi_out_urb_complete,
1309 &ep->urbs[i]);
1310 ep->urbs[i].urb->transfer_flags = URB_NO_TRANSFER_DMA_MAP;
1311 }
1312
1313 spin_lock_init(&ep->buffer_lock);
1314 tasklet_init(&ep->tasklet, snd_usbmidi_out_tasklet, (unsigned long)ep);
1315 init_waitqueue_head(&ep->drain_wait);
1316
1317 for (i = 0; i < 0x10; ++i)
1318 if (ep_info->out_cables & (1 << i)) {
1319 ep->ports[i].ep = ep;
1320 ep->ports[i].cable = i << 4;
1321 }
1322
1323 if (umidi->usb_protocol_ops->init_out_endpoint)
1324 umidi->usb_protocol_ops->init_out_endpoint(ep);
1325
1326 rep->out = ep;
1327 return 0;
1328 }
1329
1330 /*
1331 * Frees everything.
1332 */
1333 static void snd_usbmidi_free(struct snd_usb_midi* umidi)
1334 {
1335 int i;
1336
1337 for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i) {
1338 struct snd_usb_midi_endpoint* ep = &umidi->endpoints[i];
1339 if (ep->out)
1340 snd_usbmidi_out_endpoint_delete(ep->out);
1341 if (ep->in)
1342 snd_usbmidi_in_endpoint_delete(ep->in);
1343 }
1344 mutex_destroy(&umidi->mutex);
1345 kfree(umidi);
1346 }
1347
1348 /*
1349 * Unlinks all URBs (must be done before the usb_device is deleted).
1350 */
1351 void snd_usbmidi_disconnect(struct list_head* p)
1352 {
1353 struct snd_usb_midi* umidi;
1354 unsigned int i, j;
1355
1356 umidi = list_entry(p, struct snd_usb_midi, list);
1357 /*
1358 * an URB's completion handler may start the timer and
1359 * a timer may submit an URB. To reliably break the cycle
1360 * a flag under lock must be used
1361 */
1362 spin_lock_irq(&umidi->disc_lock);
1363 umidi->disconnected = 1;
1364 spin_unlock_irq(&umidi->disc_lock);
1365 for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i) {
1366 struct snd_usb_midi_endpoint* ep = &umidi->endpoints[i];
1367 if (ep->out)
1368 tasklet_kill(&ep->out->tasklet);
1369 if (ep->out) {
1370 for (j = 0; j < OUTPUT_URBS; ++j)
1371 usb_kill_urb(ep->out->urbs[j].urb);
1372 if (umidi->usb_protocol_ops->finish_out_endpoint)
1373 umidi->usb_protocol_ops->finish_out_endpoint(ep->out);
1374 ep->out->active_urbs = 0;
1375 if (ep->out->drain_urbs) {
1376 ep->out->drain_urbs = 0;
1377 wake_up(&ep->out->drain_wait);
1378 }
1379 }
1380 if (ep->in)
1381 for (j = 0; j < INPUT_URBS; ++j)
1382 usb_kill_urb(ep->in->urbs[j]);
1383 /* free endpoints here; later call can result in Oops */
1384 if (ep->out)
1385 snd_usbmidi_out_endpoint_clear(ep->out);
1386 if (ep->in) {
1387 snd_usbmidi_in_endpoint_delete(ep->in);
1388 ep->in = NULL;
1389 }
1390 }
1391 del_timer_sync(&umidi->error_timer);
1392 }
1393
1394 static void snd_usbmidi_rawmidi_free(struct snd_rawmidi *rmidi)
1395 {
1396 struct snd_usb_midi* umidi = rmidi->private_data;
1397 snd_usbmidi_free(umidi);
1398 }
1399
1400 static struct snd_rawmidi_substream *snd_usbmidi_find_substream(struct snd_usb_midi* umidi,
1401 int stream, int number)
1402 {
1403 struct list_head* list;
1404
1405 list_for_each(list, &umidi->rmidi->streams[stream].substreams) {
1406 struct snd_rawmidi_substream *substream = list_entry(list, struct snd_rawmidi_substream, list);
1407 if (substream->number == number)
1408 return substream;
1409 }
1410 return NULL;
1411 }
1412
1413 /*
1414 * This list specifies names for ports that do not fit into the standard
1415 * "(product) MIDI (n)" schema because they aren't external MIDI ports,
1416 * such as internal control or synthesizer ports.
1417 */
1418 static struct port_info {
1419 u32 id;
1420 short int port;
1421 short int voices;
1422 const char *name;
1423 unsigned int seq_flags;
1424 } snd_usbmidi_port_info[] = {
1425 #define PORT_INFO(vendor, product, num, name_, voices_, flags) \
1426 { .id = USB_ID(vendor, product), \
1427 .port = num, .voices = voices_, \
1428 .name = name_, .seq_flags = flags }
1429 #define EXTERNAL_PORT(vendor, product, num, name) \
1430 PORT_INFO(vendor, product, num, name, 0, \
1431 SNDRV_SEQ_PORT_TYPE_MIDI_GENERIC | \
1432 SNDRV_SEQ_PORT_TYPE_HARDWARE | \
1433 SNDRV_SEQ_PORT_TYPE_PORT)
1434 #define CONTROL_PORT(vendor, product, num, name) \
1435 PORT_INFO(vendor, product, num, name, 0, \
1436 SNDRV_SEQ_PORT_TYPE_MIDI_GENERIC | \
1437 SNDRV_SEQ_PORT_TYPE_HARDWARE)
1438 #define ROLAND_SYNTH_PORT(vendor, product, num, name, voices) \
1439 PORT_INFO(vendor, product, num, name, voices, \
1440 SNDRV_SEQ_PORT_TYPE_MIDI_GENERIC | \
1441 SNDRV_SEQ_PORT_TYPE_MIDI_GM | \
1442 SNDRV_SEQ_PORT_TYPE_MIDI_GM2 | \
1443 SNDRV_SEQ_PORT_TYPE_MIDI_GS | \
1444 SNDRV_SEQ_PORT_TYPE_MIDI_XG | \
1445 SNDRV_SEQ_PORT_TYPE_HARDWARE | \
1446 SNDRV_SEQ_PORT_TYPE_SYNTHESIZER)
1447 #define SOUNDCANVAS_PORT(vendor, product, num, name, voices) \
1448 PORT_INFO(vendor, product, num, name, voices, \
1449 SNDRV_SEQ_PORT_TYPE_MIDI_GENERIC | \
1450 SNDRV_SEQ_PORT_TYPE_MIDI_GM | \
1451 SNDRV_SEQ_PORT_TYPE_MIDI_GM2 | \
1452 SNDRV_SEQ_PORT_TYPE_MIDI_GS | \
1453 SNDRV_SEQ_PORT_TYPE_MIDI_XG | \
1454 SNDRV_SEQ_PORT_TYPE_MIDI_MT32 | \
1455 SNDRV_SEQ_PORT_TYPE_HARDWARE | \
1456 SNDRV_SEQ_PORT_TYPE_SYNTHESIZER)
1457 /* Roland UA-100 */
1458 CONTROL_PORT(0x0582, 0x0000, 2, "%s Control"),
1459 /* Roland SC-8850 */
1460 SOUNDCANVAS_PORT(0x0582, 0x0003, 0, "%s Part A", 128),
1461 SOUNDCANVAS_PORT(0x0582, 0x0003, 1, "%s Part B", 128),
1462 SOUNDCANVAS_PORT(0x0582, 0x0003, 2, "%s Part C", 128),
1463 SOUNDCANVAS_PORT(0x0582, 0x0003, 3, "%s Part D", 128),
1464 EXTERNAL_PORT(0x0582, 0x0003, 4, "%s MIDI 1"),
1465 EXTERNAL_PORT(0x0582, 0x0003, 5, "%s MIDI 2"),
1466 /* Roland U-8 */
1467 EXTERNAL_PORT(0x0582, 0x0004, 0, "%s MIDI"),
1468 CONTROL_PORT(0x0582, 0x0004, 1, "%s Control"),
1469 /* Roland SC-8820 */
1470 SOUNDCANVAS_PORT(0x0582, 0x0007, 0, "%s Part A", 64),
1471 SOUNDCANVAS_PORT(0x0582, 0x0007, 1, "%s Part B", 64),
1472 EXTERNAL_PORT(0x0582, 0x0007, 2, "%s MIDI"),
1473 /* Roland SK-500 */
1474 SOUNDCANVAS_PORT(0x0582, 0x000b, 0, "%s Part A", 64),
1475 SOUNDCANVAS_PORT(0x0582, 0x000b, 1, "%s Part B", 64),
1476 EXTERNAL_PORT(0x0582, 0x000b, 2, "%s MIDI"),
1477 /* Roland SC-D70 */
1478 SOUNDCANVAS_PORT(0x0582, 0x000c, 0, "%s Part A", 64),
1479 SOUNDCANVAS_PORT(0x0582, 0x000c, 1, "%s Part B", 64),
1480 EXTERNAL_PORT(0x0582, 0x000c, 2, "%s MIDI"),
1481 /* Edirol UM-880 */
1482 CONTROL_PORT(0x0582, 0x0014, 8, "%s Control"),
1483 /* Edirol SD-90 */
1484 ROLAND_SYNTH_PORT(0x0582, 0x0016, 0, "%s Part A", 128),
1485 ROLAND_SYNTH_PORT(0x0582, 0x0016, 1, "%s Part B", 128),
1486 EXTERNAL_PORT(0x0582, 0x0016, 2, "%s MIDI 1"),
1487 EXTERNAL_PORT(0x0582, 0x0016, 3, "%s MIDI 2"),
1488 /* Edirol UM-550 */
1489 CONTROL_PORT(0x0582, 0x0023, 5, "%s Control"),
1490 /* Edirol SD-20 */
1491 ROLAND_SYNTH_PORT(0x0582, 0x0027, 0, "%s Part A", 64),
1492 ROLAND_SYNTH_PORT(0x0582, 0x0027, 1, "%s Part B", 64),
1493 EXTERNAL_PORT(0x0582, 0x0027, 2, "%s MIDI"),
1494 /* Edirol SD-80 */
1495 ROLAND_SYNTH_PORT(0x0582, 0x0029, 0, "%s Part A", 128),
1496 ROLAND_SYNTH_PORT(0x0582, 0x0029, 1, "%s Part B", 128),
1497 EXTERNAL_PORT(0x0582, 0x0029, 2, "%s MIDI 1"),
1498 EXTERNAL_PORT(0x0582, 0x0029, 3, "%s MIDI 2"),
1499 /* Edirol UA-700 */
1500 EXTERNAL_PORT(0x0582, 0x002b, 0, "%s MIDI"),
1501 CONTROL_PORT(0x0582, 0x002b, 1, "%s Control"),
1502 /* Roland VariOS */
1503 EXTERNAL_PORT(0x0582, 0x002f, 0, "%s MIDI"),
1504 EXTERNAL_PORT(0x0582, 0x002f, 1, "%s External MIDI"),
1505 EXTERNAL_PORT(0x0582, 0x002f, 2, "%s Sync"),
1506 /* Edirol PCR */
1507 EXTERNAL_PORT(0x0582, 0x0033, 0, "%s MIDI"),
1508 EXTERNAL_PORT(0x0582, 0x0033, 1, "%s 1"),
1509 EXTERNAL_PORT(0x0582, 0x0033, 2, "%s 2"),
1510 /* BOSS GS-10 */
1511 EXTERNAL_PORT(0x0582, 0x003b, 0, "%s MIDI"),
1512 CONTROL_PORT(0x0582, 0x003b, 1, "%s Control"),
1513 /* Edirol UA-1000 */
1514 EXTERNAL_PORT(0x0582, 0x0044, 0, "%s MIDI"),
1515 CONTROL_PORT(0x0582, 0x0044, 1, "%s Control"),
1516 /* Edirol UR-80 */
1517 EXTERNAL_PORT(0x0582, 0x0048, 0, "%s MIDI"),
1518 EXTERNAL_PORT(0x0582, 0x0048, 1, "%s 1"),
1519 EXTERNAL_PORT(0x0582, 0x0048, 2, "%s 2"),
1520 /* Edirol PCR-A */
1521 EXTERNAL_PORT(0x0582, 0x004d, 0, "%s MIDI"),
1522 EXTERNAL_PORT(0x0582, 0x004d, 1, "%s 1"),
1523 EXTERNAL_PORT(0x0582, 0x004d, 2, "%s 2"),
1524 /* Edirol UM-3EX */
1525 CONTROL_PORT(0x0582, 0x009a, 3, "%s Control"),
1526 /* M-Audio MidiSport 8x8 */
1527 CONTROL_PORT(0x0763, 0x1031, 8, "%s Control"),
1528 CONTROL_PORT(0x0763, 0x1033, 8, "%s Control"),
1529 /* MOTU Fastlane */
1530 EXTERNAL_PORT(0x07fd, 0x0001, 0, "%s MIDI A"),
1531 EXTERNAL_PORT(0x07fd, 0x0001, 1, "%s MIDI B"),
1532 /* Emagic Unitor8/AMT8/MT4 */
1533 EXTERNAL_PORT(0x086a, 0x0001, 8, "%s Broadcast"),
1534 EXTERNAL_PORT(0x086a, 0x0002, 8, "%s Broadcast"),
1535 EXTERNAL_PORT(0x086a, 0x0003, 4, "%s Broadcast"),
1536 /* Akai MPD16 */
1537 CONTROL_PORT(0x09e8, 0x0062, 0, "%s Control"),
1538 PORT_INFO(0x09e8, 0x0062, 1, "%s MIDI", 0,
1539 SNDRV_SEQ_PORT_TYPE_MIDI_GENERIC |
1540 SNDRV_SEQ_PORT_TYPE_HARDWARE),
1541 /* Access Music Virus TI */
1542 EXTERNAL_PORT(0x133e, 0x0815, 0, "%s MIDI"),
1543 PORT_INFO(0x133e, 0x0815, 1, "%s Synth", 0,
1544 SNDRV_SEQ_PORT_TYPE_MIDI_GENERIC |
1545 SNDRV_SEQ_PORT_TYPE_HARDWARE |
1546 SNDRV_SEQ_PORT_TYPE_SYNTHESIZER),
1547 };
1548
1549 static struct port_info *find_port_info(struct snd_usb_midi* umidi, int number)
1550 {
1551 int i;
1552
1553 for (i = 0; i < ARRAY_SIZE(snd_usbmidi_port_info); ++i) {
1554 if (snd_usbmidi_port_info[i].id == umidi->usb_id &&
1555 snd_usbmidi_port_info[i].port == number)
1556 return &snd_usbmidi_port_info[i];
1557 }
1558 return NULL;
1559 }
1560
1561 static void snd_usbmidi_get_port_info(struct snd_rawmidi *rmidi, int number,
1562 struct snd_seq_port_info *seq_port_info)
1563 {
1564 struct snd_usb_midi *umidi = rmidi->private_data;
1565 struct port_info *port_info;
1566
1567 /* TODO: read port flags from descriptors */
1568 port_info = find_port_info(umidi, number);
1569 if (port_info) {
1570 seq_port_info->type = port_info->seq_flags;
1571 seq_port_info->midi_voices = port_info->voices;
1572 }
1573 }
1574
1575 static void snd_usbmidi_init_substream(struct snd_usb_midi* umidi,
1576 int stream, int number,
1577 struct snd_rawmidi_substream ** rsubstream)
1578 {
1579 struct port_info *port_info;
1580 const char *name_format;
1581
1582 struct snd_rawmidi_substream *substream = snd_usbmidi_find_substream(umidi, stream, number);
1583 if (!substream) {
1584 snd_printd(KERN_ERR "substream %d:%d not found\n", stream, number);
1585 return;
1586 }
1587
1588 /* TODO: read port name from jack descriptor */
1589 port_info = find_port_info(umidi, number);
1590 name_format = port_info ? port_info->name : "%s MIDI %d";
1591 snprintf(substream->name, sizeof(substream->name),
1592 name_format, umidi->card->shortname, number + 1);
1593
1594 *rsubstream = substream;
1595 }
1596
1597 /*
1598 * Creates the endpoints and their ports.
1599 */
1600 static int snd_usbmidi_create_endpoints(struct snd_usb_midi* umidi,
1601 struct snd_usb_midi_endpoint_info* endpoints)
1602 {
1603 int i, j, err;
1604 int out_ports = 0, in_ports = 0;
1605
1606 for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i) {
1607 if (endpoints[i].out_cables) {
1608 err = snd_usbmidi_out_endpoint_create(umidi, &endpoints[i],
1609 &umidi->endpoints[i]);
1610 if (err < 0)
1611 return err;
1612 }
1613 if (endpoints[i].in_cables) {
1614 err = snd_usbmidi_in_endpoint_create(umidi, &endpoints[i],
1615 &umidi->endpoints[i]);
1616 if (err < 0)
1617 return err;
1618 }
1619
1620 for (j = 0; j < 0x10; ++j) {
1621 if (endpoints[i].out_cables & (1 << j)) {
1622 snd_usbmidi_init_substream(umidi, SNDRV_RAWMIDI_STREAM_OUTPUT, out_ports,
1623 &umidi->endpoints[i].out->ports[j].substream);
1624 ++out_ports;
1625 }
1626 if (endpoints[i].in_cables & (1 << j)) {
1627 snd_usbmidi_init_substream(umidi, SNDRV_RAWMIDI_STREAM_INPUT, in_ports,
1628 &umidi->endpoints[i].in->ports[j].substream);
1629 ++in_ports;
1630 }
1631 }
1632 }
1633 snd_printdd(KERN_INFO "created %d output and %d input ports\n",
1634 out_ports, in_ports);
1635 return 0;
1636 }
1637
1638 /*
1639 * Returns MIDIStreaming device capabilities.
1640 */
1641 static int snd_usbmidi_get_ms_info(struct snd_usb_midi* umidi,
1642 struct snd_usb_midi_endpoint_info* endpoints)
1643 {
1644 struct usb_interface* intf;
1645 struct usb_host_interface *hostif;
1646 struct usb_interface_descriptor* intfd;
1647 struct usb_ms_header_descriptor* ms_header;
1648 struct usb_host_endpoint *hostep;
1649 struct usb_endpoint_descriptor* ep;
1650 struct usb_ms_endpoint_descriptor* ms_ep;
1651 int i, epidx;
1652
1653 intf = umidi->iface;
1654 if (!intf)
1655 return -ENXIO;
1656 hostif = &intf->altsetting[0];
1657 intfd = get_iface_desc(hostif);
1658 ms_header = (struct usb_ms_header_descriptor*)hostif->extra;
1659 if (hostif->extralen >= 7 &&
1660 ms_header->bLength >= 7 &&
1661 ms_header->bDescriptorType == USB_DT_CS_INTERFACE &&
1662 ms_header->bDescriptorSubtype == UAC_HEADER)
1663 snd_printdd(KERN_INFO "MIDIStreaming version %02x.%02x\n",
1664 ms_header->bcdMSC[1], ms_header->bcdMSC[0]);
1665 else
1666 snd_printk(KERN_WARNING "MIDIStreaming interface descriptor not found\n");
1667
1668 epidx = 0;
1669 for (i = 0; i < intfd->bNumEndpoints; ++i) {
1670 hostep = &hostif->endpoint[i];
1671 ep = get_ep_desc(hostep);
1672 if (!usb_endpoint_xfer_bulk(ep) && !usb_endpoint_xfer_int(ep))
1673 continue;
1674 ms_ep = (struct usb_ms_endpoint_descriptor*)hostep->extra;
1675 if (hostep->extralen < 4 ||
1676 ms_ep->bLength < 4 ||
1677 ms_ep->bDescriptorType != USB_DT_CS_ENDPOINT ||
1678 ms_ep->bDescriptorSubtype != UAC_MS_GENERAL)
1679 continue;
1680 if (usb_endpoint_dir_out(ep)) {
1681 if (endpoints[epidx].out_ep) {
1682 if (++epidx >= MIDI_MAX_ENDPOINTS) {
1683 snd_printk(KERN_WARNING "too many endpoints\n");
1684 break;
1685 }
1686 }
1687 endpoints[epidx].out_ep = usb_endpoint_num(ep);
1688 if (usb_endpoint_xfer_int(ep))
1689 endpoints[epidx].out_interval = ep->bInterval;
1690 else if (snd_usb_get_speed(umidi->dev) == USB_SPEED_LOW)
1691 /*
1692 * Low speed bulk transfers don't exist, so
1693 * force interrupt transfers for devices like
1694 * ESI MIDI Mate that try to use them anyway.
1695 */
1696 endpoints[epidx].out_interval = 1;
1697 endpoints[epidx].out_cables = (1 << ms_ep->bNumEmbMIDIJack) - 1;
1698 snd_printdd(KERN_INFO "EP %02X: %d jack(s)\n",
1699 ep->bEndpointAddress, ms_ep->bNumEmbMIDIJack);
1700 } else {
1701 if (endpoints[epidx].in_ep) {
1702 if (++epidx >= MIDI_MAX_ENDPOINTS) {
1703 snd_printk(KERN_WARNING "too many endpoints\n");
1704 break;
1705 }
1706 }
1707 endpoints[epidx].in_ep = usb_endpoint_num(ep);
1708 if (usb_endpoint_xfer_int(ep))
1709 endpoints[epidx].in_interval = ep->bInterval;
1710 else if (snd_usb_get_speed(umidi->dev) == USB_SPEED_LOW)
1711 endpoints[epidx].in_interval = 1;
1712 endpoints[epidx].in_cables = (1 << ms_ep->bNumEmbMIDIJack) - 1;
1713 snd_printdd(KERN_INFO "EP %02X: %d jack(s)\n",
1714 ep->bEndpointAddress, ms_ep->bNumEmbMIDIJack);
1715 }
1716 }
1717 return 0;
1718 }
1719
1720 static int roland_load_info(struct snd_kcontrol *kcontrol,
1721 struct snd_ctl_elem_info *info)
1722 {
1723 static const char *const names[] = { "High Load", "Light Load" };
1724
1725 info->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
1726 info->count = 1;
1727 info->value.enumerated.items = 2;
1728 if (info->value.enumerated.item > 1)
1729 info->value.enumerated.item = 1;
1730 strcpy(info->value.enumerated.name, names[info->value.enumerated.item]);
1731 return 0;
1732 }
1733
1734 static int roland_load_get(struct snd_kcontrol *kcontrol,
1735 struct snd_ctl_elem_value *value)
1736 {
1737 value->value.enumerated.item[0] = kcontrol->private_value;
1738 return 0;
1739 }
1740
1741 static int roland_load_put(struct snd_kcontrol *kcontrol,
1742 struct snd_ctl_elem_value *value)
1743 {
1744 struct snd_usb_midi* umidi = kcontrol->private_data;
1745 int changed;
1746
1747 if (value->value.enumerated.item[0] > 1)
1748 return -EINVAL;
1749 mutex_lock(&umidi->mutex);
1750 changed = value->value.enumerated.item[0] != kcontrol->private_value;
1751 if (changed)
1752 kcontrol->private_value = value->value.enumerated.item[0];
1753 mutex_unlock(&umidi->mutex);
1754 return changed;
1755 }
1756
1757 static struct snd_kcontrol_new roland_load_ctl = {
1758 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
1759 .name = "MIDI Input Mode",
1760 .info = roland_load_info,
1761 .get = roland_load_get,
1762 .put = roland_load_put,
1763 .private_value = 1,
1764 };
1765
1766 /*
1767 * On Roland devices, use the second alternate setting to be able to use
1768 * the interrupt input endpoint.
1769 */
1770 static void snd_usbmidi_switch_roland_altsetting(struct snd_usb_midi* umidi)
1771 {
1772 struct usb_interface* intf;
1773 struct usb_host_interface *hostif;
1774 struct usb_interface_descriptor* intfd;
1775
1776 intf = umidi->iface;
1777 if (!intf || intf->num_altsetting != 2)
1778 return;
1779
1780 hostif = &intf->altsetting[1];
1781 intfd = get_iface_desc(hostif);
1782 if (intfd->bNumEndpoints != 2 ||
1783 (get_endpoint(hostif, 0)->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) != USB_ENDPOINT_XFER_BULK ||
1784 (get_endpoint(hostif, 1)->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) != USB_ENDPOINT_XFER_INT)
1785 return;
1786
1787 snd_printdd(KERN_INFO "switching to altsetting %d with int ep\n",
1788 intfd->bAlternateSetting);
1789 usb_set_interface(umidi->dev, intfd->bInterfaceNumber,
1790 intfd->bAlternateSetting);
1791
1792 umidi->roland_load_ctl = snd_ctl_new1(&roland_load_ctl, umidi);
1793 if (snd_ctl_add(umidi->card, umidi->roland_load_ctl) < 0)
1794 umidi->roland_load_ctl = NULL;
1795 }
1796
1797 /*
1798 * Try to find any usable endpoints in the interface.
1799 */
1800 static int snd_usbmidi_detect_endpoints(struct snd_usb_midi* umidi,
1801 struct snd_usb_midi_endpoint_info* endpoint,
1802 int max_endpoints)
1803 {
1804 struct usb_interface* intf;
1805 struct usb_host_interface *hostif;
1806 struct usb_interface_descriptor* intfd;
1807 struct usb_endpoint_descriptor* epd;
1808 int i, out_eps = 0, in_eps = 0;
1809
1810 if (USB_ID_VENDOR(umidi->usb_id) == 0x0582)
1811 snd_usbmidi_switch_roland_altsetting(umidi);
1812
1813 if (endpoint[0].out_ep || endpoint[0].in_ep)
1814 return 0;
1815
1816 intf = umidi->iface;
1817 if (!intf || intf->num_altsetting < 1)
1818 return -ENOENT;
1819 hostif = intf->cur_altsetting;
1820 intfd = get_iface_desc(hostif);
1821
1822 for (i = 0; i < intfd->bNumEndpoints; ++i) {
1823 epd = get_endpoint(hostif, i);
1824 if (!usb_endpoint_xfer_bulk(epd) &&
1825 !usb_endpoint_xfer_int(epd))
1826 continue;
1827 if (out_eps < max_endpoints &&
1828 usb_endpoint_dir_out(epd)) {
1829 endpoint[out_eps].out_ep = usb_endpoint_num(epd);
1830 if (usb_endpoint_xfer_int(epd))
1831 endpoint[out_eps].out_interval = epd->bInterval;
1832 ++out_eps;
1833 }
1834 if (in_eps < max_endpoints &&
1835 usb_endpoint_dir_in(epd)) {
1836 endpoint[in_eps].in_ep = usb_endpoint_num(epd);
1837 if (usb_endpoint_xfer_int(epd))
1838 endpoint[in_eps].in_interval = epd->bInterval;
1839 ++in_eps;
1840 }
1841 }
1842 return (out_eps || in_eps) ? 0 : -ENOENT;
1843 }
1844
1845 /*
1846 * Detects the endpoints for one-port-per-endpoint protocols.
1847 */
1848 static int snd_usbmidi_detect_per_port_endpoints(struct snd_usb_midi* umidi,
1849 struct snd_usb_midi_endpoint_info* endpoints)
1850 {
1851 int err, i;
1852
1853 err = snd_usbmidi_detect_endpoints(umidi, endpoints, MIDI_MAX_ENDPOINTS);
1854 for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i) {
1855 if (endpoints[i].out_ep)
1856 endpoints[i].out_cables = 0x0001;
1857 if (endpoints[i].in_ep)
1858 endpoints[i].in_cables = 0x0001;
1859 }
1860 return err;
1861 }
1862
1863 /*
1864 * Detects the endpoints and ports of Yamaha devices.
1865 */
1866 static int snd_usbmidi_detect_yamaha(struct snd_usb_midi* umidi,
1867 struct snd_usb_midi_endpoint_info* endpoint)
1868 {
1869 struct usb_interface* intf;
1870 struct usb_host_interface *hostif;
1871 struct usb_interface_descriptor* intfd;
1872 uint8_t* cs_desc;
1873
1874 intf = umidi->iface;
1875 if (!intf)
1876 return -ENOENT;
1877 hostif = intf->altsetting;
1878 intfd = get_iface_desc(hostif);
1879 if (intfd->bNumEndpoints < 1)
1880 return -ENOENT;
1881
1882 /*
1883 * For each port there is one MIDI_IN/OUT_JACK descriptor, not
1884 * necessarily with any useful contents. So simply count 'em.
1885 */
1886 for (cs_desc = hostif->extra;
1887 cs_desc < hostif->extra + hostif->extralen && cs_desc[0] >= 2;
1888 cs_desc += cs_desc[0]) {
1889 if (cs_desc[1] == USB_DT_CS_INTERFACE) {
1890 if (cs_desc[2] == UAC_MIDI_IN_JACK)
1891 endpoint->in_cables = (endpoint->in_cables << 1) | 1;
1892 else if (cs_desc[2] == UAC_MIDI_OUT_JACK)
1893 endpoint->out_cables = (endpoint->out_cables << 1) | 1;
1894 }
1895 }
1896 if (!endpoint->in_cables && !endpoint->out_cables)
1897 return -ENOENT;
1898
1899 return snd_usbmidi_detect_endpoints(umidi, endpoint, 1);
1900 }
1901
1902 /*
1903 * Creates the endpoints and their ports for Midiman devices.
1904 */
1905 static int snd_usbmidi_create_endpoints_midiman(struct snd_usb_midi* umidi,
1906 struct snd_usb_midi_endpoint_info* endpoint)
1907 {
1908 struct snd_usb_midi_endpoint_info ep_info;
1909 struct usb_interface* intf;
1910 struct usb_host_interface *hostif;
1911 struct usb_interface_descriptor* intfd;
1912 struct usb_endpoint_descriptor* epd;
1913 int cable, err;
1914
1915 intf = umidi->iface;
1916 if (!intf)
1917 return -ENOENT;
1918 hostif = intf->altsetting;
1919 intfd = get_iface_desc(hostif);
1920 /*
1921 * The various MidiSport devices have more or less random endpoint
1922 * numbers, so we have to identify the endpoints by their index in
1923 * the descriptor array, like the driver for that other OS does.
1924 *
1925 * There is one interrupt input endpoint for all input ports, one
1926 * bulk output endpoint for even-numbered ports, and one for odd-
1927 * numbered ports. Both bulk output endpoints have corresponding
1928 * input bulk endpoints (at indices 1 and 3) which aren't used.
1929 */
1930 if (intfd->bNumEndpoints < (endpoint->out_cables > 0x0001 ? 5 : 3)) {
1931 snd_printdd(KERN_ERR "not enough endpoints\n");
1932 return -ENOENT;
1933 }
1934
1935 epd = get_endpoint(hostif, 0);
1936 if (!usb_endpoint_dir_in(epd) || !usb_endpoint_xfer_int(epd)) {
1937 snd_printdd(KERN_ERR "endpoint[0] isn't interrupt\n");
1938 return -ENXIO;
1939 }
1940 epd = get_endpoint(hostif, 2);
1941 if (!usb_endpoint_dir_out(epd) || !usb_endpoint_xfer_bulk(epd)) {
1942 snd_printdd(KERN_ERR "endpoint[2] isn't bulk output\n");
1943 return -ENXIO;
1944 }
1945 if (endpoint->out_cables > 0x0001) {
1946 epd = get_endpoint(hostif, 4);
1947 if (!usb_endpoint_dir_out(epd) ||
1948 !usb_endpoint_xfer_bulk(epd)) {
1949 snd_printdd(KERN_ERR "endpoint[4] isn't bulk output\n");
1950 return -ENXIO;
1951 }
1952 }
1953
1954 ep_info.out_ep = get_endpoint(hostif, 2)->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK;
1955 ep_info.out_interval = 0;
1956 ep_info.out_cables = endpoint->out_cables & 0x5555;
1957 err = snd_usbmidi_out_endpoint_create(umidi, &ep_info, &umidi->endpoints[0]);
1958 if (err < 0)
1959 return err;
1960
1961 ep_info.in_ep = get_endpoint(hostif, 0)->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK;
1962 ep_info.in_interval = get_endpoint(hostif, 0)->bInterval;
1963 ep_info.in_cables = endpoint->in_cables;
1964 err = snd_usbmidi_in_endpoint_create(umidi, &ep_info, &umidi->endpoints[0]);
1965 if (err < 0)
1966 return err;
1967
1968 if (endpoint->out_cables > 0x0001) {
1969 ep_info.out_ep = get_endpoint(hostif, 4)->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK;
1970 ep_info.out_cables = endpoint->out_cables & 0xaaaa;
1971 err = snd_usbmidi_out_endpoint_create(umidi, &ep_info, &umidi->endpoints[1]);
1972 if (err < 0)
1973 return err;
1974 }
1975
1976 for (cable = 0; cable < 0x10; ++cable) {
1977 if (endpoint->out_cables & (1 << cable))
1978 snd_usbmidi_init_substream(umidi, SNDRV_RAWMIDI_STREAM_OUTPUT, cable,
1979 &umidi->endpoints[cable & 1].out->ports[cable].substream);
1980 if (endpoint->in_cables & (1 << cable))
1981 snd_usbmidi_init_substream(umidi, SNDRV_RAWMIDI_STREAM_INPUT, cable,
1982 &umidi->endpoints[0].in->ports[cable].substream);
1983 }
1984 return 0;
1985 }
1986
1987 static struct snd_rawmidi_global_ops snd_usbmidi_ops = {
1988 .get_port_info = snd_usbmidi_get_port_info,
1989 };
1990
1991 static int snd_usbmidi_create_rawmidi(struct snd_usb_midi* umidi,
1992 int out_ports, int in_ports)
1993 {
1994 struct snd_rawmidi *rmidi;
1995 int err;
1996
1997 err = snd_rawmidi_new(umidi->card, "USB MIDI",
1998 umidi->next_midi_device++,
1999 out_ports, in_ports, &rmidi);
2000 if (err < 0)
2001 return err;
2002 strcpy(rmidi->name, umidi->card->shortname);
2003 rmidi->info_flags = SNDRV_RAWMIDI_INFO_OUTPUT |
2004 SNDRV_RAWMIDI_INFO_INPUT |
2005 SNDRV_RAWMIDI_INFO_DUPLEX;
2006 rmidi->ops = &snd_usbmidi_ops;
2007 rmidi->private_data = umidi;
2008 rmidi->private_free = snd_usbmidi_rawmidi_free;
2009 snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT, &snd_usbmidi_output_ops);
2010 snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_INPUT, &snd_usbmidi_input_ops);
2011
2012 umidi->rmidi = rmidi;
2013 return 0;
2014 }
2015
2016 /*
2017 * Temporarily stop input.
2018 */
2019 void snd_usbmidi_input_stop(struct list_head* p)
2020 {
2021 struct snd_usb_midi* umidi;
2022 unsigned int i, j;
2023
2024 umidi = list_entry(p, struct snd_usb_midi, list);
2025 for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i) {
2026 struct snd_usb_midi_endpoint* ep = &umidi->endpoints[i];
2027 if (ep->in)
2028 for (j = 0; j < INPUT_URBS; ++j)
2029 usb_kill_urb(ep->in->urbs[j]);
2030 }
2031 }
2032
2033 static void snd_usbmidi_input_start_ep(struct snd_usb_midi_in_endpoint* ep)
2034 {
2035 unsigned int i;
2036
2037 if (!ep)
2038 return;
2039 for (i = 0; i < INPUT_URBS; ++i) {
2040 struct urb* urb = ep->urbs[i];
2041 urb->dev = ep->umidi->dev;
2042 snd_usbmidi_submit_urb(urb, GFP_KERNEL);
2043 }
2044 }
2045
2046 /*
2047 * Resume input after a call to snd_usbmidi_input_stop().
2048 */
2049 void snd_usbmidi_input_start(struct list_head* p)
2050 {
2051 struct snd_usb_midi* umidi;
2052 int i;
2053
2054 umidi = list_entry(p, struct snd_usb_midi, list);
2055 for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i)
2056 snd_usbmidi_input_start_ep(umidi->endpoints[i].in);
2057 }
2058
2059 /*
2060 * Creates and registers everything needed for a MIDI streaming interface.
2061 */
2062 int snd_usbmidi_create(struct snd_card *card,
2063 struct usb_interface* iface,
2064 struct list_head *midi_list,
2065 const struct snd_usb_audio_quirk* quirk)
2066 {
2067 struct snd_usb_midi* umidi;
2068 struct snd_usb_midi_endpoint_info endpoints[MIDI_MAX_ENDPOINTS];
2069 int out_ports, in_ports;
2070 int i, err;
2071
2072 umidi = kzalloc(sizeof(*umidi), GFP_KERNEL);
2073 if (!umidi)
2074 return -ENOMEM;
2075 umidi->dev = interface_to_usbdev(iface);
2076 umidi->card = card;
2077 umidi->iface = iface;
2078 umidi->quirk = quirk;
2079 umidi->usb_protocol_ops = &snd_usbmidi_standard_ops;
2080 init_timer(&umidi->error_timer);
2081 spin_lock_init(&umidi->disc_lock);
2082 mutex_init(&umidi->mutex);
2083 umidi->usb_id = USB_ID(le16_to_cpu(umidi->dev->descriptor.idVendor),
2084 le16_to_cpu(umidi->dev->descriptor.idProduct));
2085 umidi->error_timer.function = snd_usbmidi_error_timer;
2086 umidi->error_timer.data = (unsigned long)umidi;
2087
2088 /* detect the endpoint(s) to use */
2089 memset(endpoints, 0, sizeof(endpoints));
2090 switch (quirk ? quirk->type : QUIRK_MIDI_STANDARD_INTERFACE) {
2091 case QUIRK_MIDI_STANDARD_INTERFACE:
2092 err = snd_usbmidi_get_ms_info(umidi, endpoints);
2093 if (umidi->usb_id == USB_ID(0x0763, 0x0150)) /* M-Audio Uno */
2094 umidi->usb_protocol_ops =
2095 &snd_usbmidi_maudio_broken_running_status_ops;
2096 break;
2097 case QUIRK_MIDI_US122L:
2098 umidi->usb_protocol_ops = &snd_usbmidi_122l_ops;
2099 /* fall through */
2100 case QUIRK_MIDI_FIXED_ENDPOINT:
2101 memcpy(&endpoints[0], quirk->data,
2102 sizeof(struct snd_usb_midi_endpoint_info));
2103 err = snd_usbmidi_detect_endpoints(umidi, &endpoints[0], 1);
2104 break;
2105 case QUIRK_MIDI_YAMAHA:
2106 err = snd_usbmidi_detect_yamaha(umidi, &endpoints[0]);
2107 break;
2108 case QUIRK_MIDI_MIDIMAN:
2109 umidi->usb_protocol_ops = &snd_usbmidi_midiman_ops;
2110 memcpy(&endpoints[0], quirk->data,
2111 sizeof(struct snd_usb_midi_endpoint_info));
2112 err = 0;
2113 break;
2114 case QUIRK_MIDI_NOVATION:
2115 umidi->usb_protocol_ops = &snd_usbmidi_novation_ops;
2116 err = snd_usbmidi_detect_per_port_endpoints(umidi, endpoints);
2117 break;
2118 case QUIRK_MIDI_FASTLANE:
2119 umidi->usb_protocol_ops = &snd_usbmidi_raw_ops;
2120 /*
2121 * Interface 1 contains isochronous endpoints, but with the same
2122 * numbers as in interface 0. Since it is interface 1 that the
2123 * USB core has most recently seen, these descriptors are now
2124 * associated with the endpoint numbers. This will foul up our
2125 * attempts to submit bulk/interrupt URBs to the endpoints in
2126 * interface 0, so we have to make sure that the USB core looks
2127 * again at interface 0 by calling usb_set_interface() on it.
2128 */
2129 usb_set_interface(umidi->dev, 0, 0);
2130 err = snd_usbmidi_detect_per_port_endpoints(umidi, endpoints);
2131 break;
2132 case QUIRK_MIDI_EMAGIC:
2133 umidi->usb_protocol_ops = &snd_usbmidi_emagic_ops;
2134 memcpy(&endpoints[0], quirk->data,
2135 sizeof(struct snd_usb_midi_endpoint_info));
2136 err = snd_usbmidi_detect_endpoints(umidi, &endpoints[0], 1);
2137 break;
2138 case QUIRK_MIDI_CME:
2139 umidi->usb_protocol_ops = &snd_usbmidi_cme_ops;
2140 err = snd_usbmidi_detect_per_port_endpoints(umidi, endpoints);
2141 break;
2142 case QUIRK_MIDI_AKAI:
2143 umidi->usb_protocol_ops = &snd_usbmidi_akai_ops;
2144 err = snd_usbmidi_detect_per_port_endpoints(umidi, endpoints);
2145 /* endpoint 1 is input-only */
2146 endpoints[1].out_cables = 0;
2147 break;
2148 default:
2149 snd_printd(KERN_ERR "invalid quirk type %d\n", quirk->type);
2150 err = -ENXIO;
2151 break;
2152 }
2153 if (err < 0) {
2154 kfree(umidi);
2155 return err;
2156 }
2157
2158 /* create rawmidi device */
2159 out_ports = 0;
2160 in_ports = 0;
2161 for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i) {
2162 out_ports += hweight16(endpoints[i].out_cables);
2163 in_ports += hweight16(endpoints[i].in_cables);
2164 }
2165 err = snd_usbmidi_create_rawmidi(umidi, out_ports, in_ports);
2166 if (err < 0) {
2167 kfree(umidi);
2168 return err;
2169 }
2170
2171 /* create endpoint/port structures */
2172 if (quirk && quirk->type == QUIRK_MIDI_MIDIMAN)
2173 err = snd_usbmidi_create_endpoints_midiman(umidi, &endpoints[0]);
2174 else
2175 err = snd_usbmidi_create_endpoints(umidi, endpoints);
2176 if (err < 0) {
2177 snd_usbmidi_free(umidi);
2178 return err;
2179 }
2180
2181 list_add_tail(&umidi->list, midi_list);
2182
2183 for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i)
2184 snd_usbmidi_input_start_ep(umidi->endpoints[i].in);
2185 return 0;
2186 }
2187
2188 EXPORT_SYMBOL(snd_usbmidi_create);
2189 EXPORT_SYMBOL(snd_usbmidi_input_stop);
2190 EXPORT_SYMBOL(snd_usbmidi_input_start);
2191 EXPORT_SYMBOL(snd_usbmidi_disconnect);