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ALSA: echoaudio: Remove incorrect part of assertion
[zen-stable.git] / sound / usb / midi.c
blobc83f6143c0eb34d8f77f969e1928427458b4268a
1 /*
2 * usbmidi.c - ALSA USB MIDI driver
3 *
4 * Copyright (c) 2002-2009 Clemens Ladisch
5 * All rights reserved.
6 *
7 * Based on the OSS usb-midi driver by NAGANO Daisuke,
8 * NetBSD's umidi driver by Takuya SHIOZAKI,
9 * the "USB Device Class Definition for MIDI Devices" by Roland
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions, and the following disclaimer,
16 * without modification.
17 * 2. The name of the author may not be used to endorse or promote products
18 * derived from this software without specific prior written permission.
19 *
20 * Alternatively, this software may be distributed and/or modified under the
21 * terms of the GNU General Public License as published by the Free Software
22 * Foundation; either version 2 of the License, or (at your option) any later
23 * version.
24 *
25 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
28 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
29 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
35 * SUCH DAMAGE.
36 */
37
38 #include <linux/kernel.h>
39 #include <linux/types.h>
40 #include <linux/bitops.h>
41 #include <linux/interrupt.h>
42 #include <linux/spinlock.h>
43 #include <linux/string.h>
44 #include <linux/init.h>
45 #include <linux/slab.h>
46 #include <linux/timer.h>
47 #include <linux/usb.h>
48 #include <linux/wait.h>
49 #include <linux/usb/audio.h>
50 #include <linux/module.h>
51
52 #include <sound/core.h>
53 #include <sound/control.h>
54 #include <sound/rawmidi.h>
55 #include <sound/asequencer.h>
56 #include "usbaudio.h"
57 #include "midi.h"
58 #include "power.h"
59 #include "helper.h"
60
61 /*
62 * define this to log all USB packets
63 */
64 /* #define DUMP_PACKETS */
65
66 /*
67 * how long to wait after some USB errors, so that khubd can disconnect() us
68 * without too many spurious errors
69 */
70 #define ERROR_DELAY_JIFFIES (HZ / 10)
71
72 #define OUTPUT_URBS 7
73 #define INPUT_URBS 7
74
75
76 MODULE_AUTHOR("Clemens Ladisch <clemens@ladisch.de>");
77 MODULE_DESCRIPTION("USB Audio/MIDI helper module");
78 MODULE_LICENSE("Dual BSD/GPL");
79
80
81 struct usb_ms_header_descriptor {
82 __u8 bLength;
83 __u8 bDescriptorType;
84 __u8 bDescriptorSubtype;
85 __u8 bcdMSC[2];
86 __le16 wTotalLength;
87 } __attribute__ ((packed));
88
89 struct usb_ms_endpoint_descriptor {
90 __u8 bLength;
91 __u8 bDescriptorType;
92 __u8 bDescriptorSubtype;
93 __u8 bNumEmbMIDIJack;
94 __u8 baAssocJackID[0];
95 } __attribute__ ((packed));
96
97 struct snd_usb_midi_in_endpoint;
98 struct snd_usb_midi_out_endpoint;
99 struct snd_usb_midi_endpoint;
100
101 struct usb_protocol_ops {
102 void (*input)(struct snd_usb_midi_in_endpoint*, uint8_t*, int);
103 void (*output)(struct snd_usb_midi_out_endpoint *ep, struct urb *urb);
104 void (*output_packet)(struct urb*, uint8_t, uint8_t, uint8_t, uint8_t);
105 void (*init_out_endpoint)(struct snd_usb_midi_out_endpoint*);
106 void (*finish_out_endpoint)(struct snd_usb_midi_out_endpoint*);
107 };
108
109 struct snd_usb_midi {
110 struct usb_device *dev;
111 struct snd_card *card;
112 struct usb_interface *iface;
113 const struct snd_usb_audio_quirk *quirk;
114 struct snd_rawmidi *rmidi;
115 struct usb_protocol_ops* usb_protocol_ops;
116 struct list_head list;
117 struct timer_list error_timer;
118 spinlock_t disc_lock;
119 struct mutex mutex;
120 u32 usb_id;
121 int next_midi_device;
122
123 struct snd_usb_midi_endpoint {
124 struct snd_usb_midi_out_endpoint *out;
125 struct snd_usb_midi_in_endpoint *in;
126 } endpoints[MIDI_MAX_ENDPOINTS];
127 unsigned long input_triggered;
128 unsigned int opened;
129 unsigned char disconnected;
130
131 struct snd_kcontrol *roland_load_ctl;
132 };
133
134 struct snd_usb_midi_out_endpoint {
135 struct snd_usb_midi* umidi;
136 struct out_urb_context {
137 struct urb *urb;
138 struct snd_usb_midi_out_endpoint *ep;
139 } urbs[OUTPUT_URBS];
140 unsigned int active_urbs;
141 unsigned int drain_urbs;
142 int max_transfer; /* size of urb buffer */
143 struct tasklet_struct tasklet;
144 unsigned int next_urb;
145 spinlock_t buffer_lock;
146
147 struct usbmidi_out_port {
148 struct snd_usb_midi_out_endpoint* ep;
149 struct snd_rawmidi_substream *substream;
150 int active;
151 uint8_t cable; /* cable number << 4 */
152 uint8_t state;
153 #define STATE_UNKNOWN 0
154 #define STATE_1PARAM 1
155 #define STATE_2PARAM_1 2
156 #define STATE_2PARAM_2 3
157 #define STATE_SYSEX_0 4
158 #define STATE_SYSEX_1 5
159 #define STATE_SYSEX_2 6
160 uint8_t data[2];
161 } ports[0x10];
162 int current_port;
163
164 wait_queue_head_t drain_wait;
165 };
166
167 struct snd_usb_midi_in_endpoint {
168 struct snd_usb_midi* umidi;
169 struct urb* urbs[INPUT_URBS];
170 struct usbmidi_in_port {
171 struct snd_rawmidi_substream *substream;
172 u8 running_status_length;
173 } ports[0x10];
174 u8 seen_f5;
175 u8 error_resubmit;
176 int current_port;
177 };
178
179 static void snd_usbmidi_do_output(struct snd_usb_midi_out_endpoint* ep);
180
181 static const uint8_t snd_usbmidi_cin_length[] = {
182 0, 0, 2, 3, 3, 1, 2, 3, 3, 3, 3, 3, 2, 2, 3, 1
183 };
184
185 /*
186 * Submits the URB, with error handling.
187 */
188 static int snd_usbmidi_submit_urb(struct urb* urb, gfp_t flags)
189 {
190 int err = usb_submit_urb(urb, flags);
191 if (err < 0 && err != -ENODEV)
192 snd_printk(KERN_ERR "usb_submit_urb: %d\n", err);
193 return err;
194 }
195
196 /*
197 * Error handling for URB completion functions.
198 */
199 static int snd_usbmidi_urb_error(int status)
200 {
201 switch (status) {
202 /* manually unlinked, or device gone */
203 case -ENOENT:
204 case -ECONNRESET:
205 case -ESHUTDOWN:
206 case -ENODEV:
207 return -ENODEV;
208 /* errors that might occur during unplugging */
209 case -EPROTO:
210 case -ETIME:
211 case -EILSEQ:
212 return -EIO;
213 default:
214 snd_printk(KERN_ERR "urb status %d\n", status);
215 return 0; /* continue */
216 }
217 }
218
219 /*
220 * Receives a chunk of MIDI data.
221 */
222 static void snd_usbmidi_input_data(struct snd_usb_midi_in_endpoint* ep, int portidx,
223 uint8_t* data, int length)
224 {
225 struct usbmidi_in_port* port = &ep->ports[portidx];
226
227 if (!port->substream) {
228 snd_printd("unexpected port %d!\n", portidx);
229 return;
230 }
231 if (!test_bit(port->substream->number, &ep->umidi->input_triggered))
232 return;
233 snd_rawmidi_receive(port->substream, data, length);
234 }
235
236 #ifdef DUMP_PACKETS
237 static void dump_urb(const char *type, const u8 *data, int length)
238 {
239 snd_printk(KERN_DEBUG "%s packet: [", type);
240 for (; length > 0; ++data, --length)
241 printk(" %02x", *data);
242 printk(" ]\n");
243 }
244 #else
245 #define dump_urb(type, data, length) /* nothing */
246 #endif
247
248 /*
249 * Processes the data read from the device.
250 */
251 static void snd_usbmidi_in_urb_complete(struct urb* urb)
252 {
253 struct snd_usb_midi_in_endpoint* ep = urb->context;
254
255 if (urb->status == 0) {
256 dump_urb("received", urb->transfer_buffer, urb->actual_length);
257 ep->umidi->usb_protocol_ops->input(ep, urb->transfer_buffer,
258 urb->actual_length);
259 } else {
260 int err = snd_usbmidi_urb_error(urb->status);
261 if (err < 0) {
262 if (err != -ENODEV) {
263 ep->error_resubmit = 1;
264 mod_timer(&ep->umidi->error_timer,
265 jiffies + ERROR_DELAY_JIFFIES);
266 }
267 return;
268 }
269 }
270
271 urb->dev = ep->umidi->dev;
272 snd_usbmidi_submit_urb(urb, GFP_ATOMIC);
273 }
274
275 static void snd_usbmidi_out_urb_complete(struct urb* urb)
276 {
277 struct out_urb_context *context = urb->context;
278 struct snd_usb_midi_out_endpoint* ep = context->ep;
279 unsigned int urb_index;
280
281 spin_lock(&ep->buffer_lock);
282 urb_index = context - ep->urbs;
283 ep->active_urbs &= ~(1 << urb_index);
284 if (unlikely(ep->drain_urbs)) {
285 ep->drain_urbs &= ~(1 << urb_index);
286 wake_up(&ep->drain_wait);
287 }
288 spin_unlock(&ep->buffer_lock);
289 if (urb->status < 0) {
290 int err = snd_usbmidi_urb_error(urb->status);
291 if (err < 0) {
292 if (err != -ENODEV)
293 mod_timer(&ep->umidi->error_timer,
294 jiffies + ERROR_DELAY_JIFFIES);
295 return;
296 }
297 }
298 snd_usbmidi_do_output(ep);
299 }
300
301 /*
302 * This is called when some data should be transferred to the device
303 * (from one or more substreams).
304 */
305 static void snd_usbmidi_do_output(struct snd_usb_midi_out_endpoint* ep)
306 {
307 unsigned int urb_index;
308 struct urb* urb;
309 unsigned long flags;
310
311 spin_lock_irqsave(&ep->buffer_lock, flags);
312 if (ep->umidi->disconnected) {
313 spin_unlock_irqrestore(&ep->buffer_lock, flags);
314 return;
315 }
316
317 urb_index = ep->next_urb;
318 for (;;) {
319 if (!(ep->active_urbs & (1 << urb_index))) {
320 urb = ep->urbs[urb_index].urb;
321 urb->transfer_buffer_length = 0;
322 ep->umidi->usb_protocol_ops->output(ep, urb);
323 if (urb->transfer_buffer_length == 0)
324 break;
325
326 dump_urb("sending", urb->transfer_buffer,
327 urb->transfer_buffer_length);
328 urb->dev = ep->umidi->dev;
329 if (snd_usbmidi_submit_urb(urb, GFP_ATOMIC) < 0)
330 break;
331 ep->active_urbs |= 1 << urb_index;
332 }
333 if (++urb_index >= OUTPUT_URBS)
334 urb_index = 0;
335 if (urb_index == ep->next_urb)
336 break;
337 }
338 ep->next_urb = urb_index;
339 spin_unlock_irqrestore(&ep->buffer_lock, flags);
340 }
341
342 static void snd_usbmidi_out_tasklet(unsigned long data)
343 {
344 struct snd_usb_midi_out_endpoint* ep = (struct snd_usb_midi_out_endpoint *) data;
345
346 snd_usbmidi_do_output(ep);
347 }
348
349 /* called after transfers had been interrupted due to some USB error */
350 static void snd_usbmidi_error_timer(unsigned long data)
351 {
352 struct snd_usb_midi *umidi = (struct snd_usb_midi *)data;
353 unsigned int i, j;
354
355 spin_lock(&umidi->disc_lock);
356 if (umidi->disconnected) {
357 spin_unlock(&umidi->disc_lock);
358 return;
359 }
360 for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i) {
361 struct snd_usb_midi_in_endpoint *in = umidi->endpoints[i].in;
362 if (in && in->error_resubmit) {
363 in->error_resubmit = 0;
364 for (j = 0; j < INPUT_URBS; ++j) {
365 in->urbs[j]->dev = umidi->dev;
366 snd_usbmidi_submit_urb(in->urbs[j], GFP_ATOMIC);
367 }
368 }
369 if (umidi->endpoints[i].out)
370 snd_usbmidi_do_output(umidi->endpoints[i].out);
371 }
372 spin_unlock(&umidi->disc_lock);
373 }
374
375 /* helper function to send static data that may not DMA-able */
376 static int send_bulk_static_data(struct snd_usb_midi_out_endpoint* ep,
377 const void *data, int len)
378 {
379 int err = 0;
380 void *buf = kmemdup(data, len, GFP_KERNEL);
381 if (!buf)
382 return -ENOMEM;
383 dump_urb("sending", buf, len);
384 if (ep->urbs[0].urb)
385 err = usb_bulk_msg(ep->umidi->dev, ep->urbs[0].urb->pipe,
386 buf, len, NULL, 250);
387 kfree(buf);
388 return err;
389 }
390
391 /*
392 * Standard USB MIDI protocol: see the spec.
393 * Midiman protocol: like the standard protocol, but the control byte is the
394 * fourth byte in each packet, and uses length instead of CIN.
395 */
396
397 static void snd_usbmidi_standard_input(struct snd_usb_midi_in_endpoint* ep,
398 uint8_t* buffer, int buffer_length)
399 {
400 int i;
401
402 for (i = 0; i + 3 < buffer_length; i += 4)
403 if (buffer[i] != 0) {
404 int cable = buffer[i] >> 4;
405 int length = snd_usbmidi_cin_length[buffer[i] & 0x0f];
406 snd_usbmidi_input_data(ep, cable, &buffer[i + 1], length);
407 }
408 }
409
410 static void snd_usbmidi_midiman_input(struct snd_usb_midi_in_endpoint* ep,
411 uint8_t* buffer, int buffer_length)
412 {
413 int i;
414
415 for (i = 0; i + 3 < buffer_length; i += 4)
416 if (buffer[i + 3] != 0) {
417 int port = buffer[i + 3] >> 4;
418 int length = buffer[i + 3] & 3;
419 snd_usbmidi_input_data(ep, port, &buffer[i], length);
420 }
421 }
422
423 /*
424 * Buggy M-Audio device: running status on input results in a packet that has
425 * the data bytes but not the status byte and that is marked with CIN 4.
426 */
427 static void snd_usbmidi_maudio_broken_running_status_input(
428 struct snd_usb_midi_in_endpoint* ep,
429 uint8_t* buffer, int buffer_length)
430 {
431 int i;
432
433 for (i = 0; i + 3 < buffer_length; i += 4)
434 if (buffer[i] != 0) {
435 int cable = buffer[i] >> 4;
436 u8 cin = buffer[i] & 0x0f;
437 struct usbmidi_in_port *port = &ep->ports[cable];
438 int length;
439
440 length = snd_usbmidi_cin_length[cin];
441 if (cin == 0xf && buffer[i + 1] >= 0xf8)
442 ; /* realtime msg: no running status change */
443 else if (cin >= 0x8 && cin <= 0xe)
444 /* channel msg */
445 port->running_status_length = length - 1;
446 else if (cin == 0x4 &&
447 port->running_status_length != 0 &&
448 buffer[i + 1] < 0x80)
449 /* CIN 4 that is not a SysEx */
450 length = port->running_status_length;
451 else
452 /*
453 * All other msgs cannot begin running status.
454 * (A channel msg sent as two or three CIN 0xF
455 * packets could in theory, but this device
456 * doesn't use this format.)
457 */
458 port->running_status_length = 0;
459 snd_usbmidi_input_data(ep, cable, &buffer[i + 1], length);
460 }
461 }
462
463 /*
464 * CME protocol: like the standard protocol, but SysEx commands are sent as a
465 * single USB packet preceded by a 0x0F byte.
466 */
467 static void snd_usbmidi_cme_input(struct snd_usb_midi_in_endpoint *ep,
468 uint8_t *buffer, int buffer_length)
469 {
470 if (buffer_length < 2 || (buffer[0] & 0x0f) != 0x0f)
471 snd_usbmidi_standard_input(ep, buffer, buffer_length);
472 else
473 snd_usbmidi_input_data(ep, buffer[0] >> 4,
474 &buffer[1], buffer_length - 1);
475 }
476
477 /*
478 * Adds one USB MIDI packet to the output buffer.
479 */
480 static void snd_usbmidi_output_standard_packet(struct urb* urb, uint8_t p0,
481 uint8_t p1, uint8_t p2, uint8_t p3)
482 {
483
484 uint8_t* buf = (uint8_t*)urb->transfer_buffer + urb->transfer_buffer_length;
485 buf[0] = p0;
486 buf[1] = p1;
487 buf[2] = p2;
488 buf[3] = p3;
489 urb->transfer_buffer_length += 4;
490 }
491
492 /*
493 * Adds one Midiman packet to the output buffer.
494 */
495 static void snd_usbmidi_output_midiman_packet(struct urb* urb, uint8_t p0,
496 uint8_t p1, uint8_t p2, uint8_t p3)
497 {
498
499 uint8_t* buf = (uint8_t*)urb->transfer_buffer + urb->transfer_buffer_length;
500 buf[0] = p1;
501 buf[1] = p2;
502 buf[2] = p3;
503 buf[3] = (p0 & 0xf0) | snd_usbmidi_cin_length[p0 & 0x0f];
504 urb->transfer_buffer_length += 4;
505 }
506
507 /*
508 * Converts MIDI commands to USB MIDI packets.
509 */
510 static void snd_usbmidi_transmit_byte(struct usbmidi_out_port* port,
511 uint8_t b, struct urb* urb)
512 {
513 uint8_t p0 = port->cable;
514 void (*output_packet)(struct urb*, uint8_t, uint8_t, uint8_t, uint8_t) =
515 port->ep->umidi->usb_protocol_ops->output_packet;
516
517 if (b >= 0xf8) {
518 output_packet(urb, p0 | 0x0f, b, 0, 0);
519 } else if (b >= 0xf0) {
520 switch (b) {
521 case 0xf0:
522 port->data[0] = b;
523 port->state = STATE_SYSEX_1;
524 break;
525 case 0xf1:
526 case 0xf3:
527 port->data[0] = b;
528 port->state = STATE_1PARAM;
529 break;
530 case 0xf2:
531 port->data[0] = b;
532 port->state = STATE_2PARAM_1;
533 break;
534 case 0xf4:
535 case 0xf5:
536 port->state = STATE_UNKNOWN;
537 break;
538 case 0xf6:
539 output_packet(urb, p0 | 0x05, 0xf6, 0, 0);
540 port->state = STATE_UNKNOWN;
541 break;
542 case 0xf7:
543 switch (port->state) {
544 case STATE_SYSEX_0:
545 output_packet(urb, p0 | 0x05, 0xf7, 0, 0);
546 break;
547 case STATE_SYSEX_1:
548 output_packet(urb, p0 | 0x06, port->data[0], 0xf7, 0);
549 break;
550 case STATE_SYSEX_2:
551 output_packet(urb, p0 | 0x07, port->data[0], port->data[1], 0xf7);
552 break;
553 }
554 port->state = STATE_UNKNOWN;
555 break;
556 }
557 } else if (b >= 0x80) {
558 port->data[0] = b;
559 if (b >= 0xc0 && b <= 0xdf)
560 port->state = STATE_1PARAM;
561 else
562 port->state = STATE_2PARAM_1;
563 } else { /* b < 0x80 */
564 switch (port->state) {
565 case STATE_1PARAM:
566 if (port->data[0] < 0xf0) {
567 p0 |= port->data[0] >> 4;
568 } else {
569 p0 |= 0x02;
570 port->state = STATE_UNKNOWN;
571 }
572 output_packet(urb, p0, port->data[0], b, 0);
573 break;
574 case STATE_2PARAM_1:
575 port->data[1] = b;
576 port->state = STATE_2PARAM_2;
577 break;
578 case STATE_2PARAM_2:
579 if (port->data[0] < 0xf0) {
580 p0 |= port->data[0] >> 4;
581 port->state = STATE_2PARAM_1;
582 } else {
583 p0 |= 0x03;
584 port->state = STATE_UNKNOWN;
585 }
586 output_packet(urb, p0, port->data[0], port->data[1], b);
587 break;
588 case STATE_SYSEX_0:
589 port->data[0] = b;
590 port->state = STATE_SYSEX_1;
591 break;
592 case STATE_SYSEX_1:
593 port->data[1] = b;
594 port->state = STATE_SYSEX_2;
595 break;
596 case STATE_SYSEX_2:
597 output_packet(urb, p0 | 0x04, port->data[0], port->data[1], b);
598 port->state = STATE_SYSEX_0;
599 break;
600 }
601 }
602 }
603
604 static void snd_usbmidi_standard_output(struct snd_usb_midi_out_endpoint* ep,
605 struct urb *urb)
606 {
607 int p;
608
609 /* FIXME: lower-numbered ports can starve higher-numbered ports */
610 for (p = 0; p < 0x10; ++p) {
611 struct usbmidi_out_port* port = &ep->ports[p];
612 if (!port->active)
613 continue;
614 while (urb->transfer_buffer_length + 3 < ep->max_transfer) {
615 uint8_t b;
616 if (snd_rawmidi_transmit(port->substream, &b, 1) != 1) {
617 port->active = 0;
618 break;
619 }
620 snd_usbmidi_transmit_byte(port, b, urb);
621 }
622 }
623 }
624
625 static struct usb_protocol_ops snd_usbmidi_standard_ops = {
626 .input = snd_usbmidi_standard_input,
627 .output = snd_usbmidi_standard_output,
628 .output_packet = snd_usbmidi_output_standard_packet,
629 };
630
631 static struct usb_protocol_ops snd_usbmidi_midiman_ops = {
632 .input = snd_usbmidi_midiman_input,
633 .output = snd_usbmidi_standard_output,
634 .output_packet = snd_usbmidi_output_midiman_packet,
635 };
636
637 static struct usb_protocol_ops snd_usbmidi_maudio_broken_running_status_ops = {
638 .input = snd_usbmidi_maudio_broken_running_status_input,
639 .output = snd_usbmidi_standard_output,
640 .output_packet = snd_usbmidi_output_standard_packet,
641 };
642
643 static struct usb_protocol_ops snd_usbmidi_cme_ops = {
644 .input = snd_usbmidi_cme_input,
645 .output = snd_usbmidi_standard_output,
646 .output_packet = snd_usbmidi_output_standard_packet,
647 };
648
649 /*
650 * AKAI MPD16 protocol:
651 *
652 * For control port (endpoint 1):
653 * ==============================
654 * One or more chunks consisting of first byte of (0x10 | msg_len) and then a
655 * SysEx message (msg_len=9 bytes long).
656 *
657 * For data port (endpoint 2):
658 * ===========================
659 * One or more chunks consisting of first byte of (0x20 | msg_len) and then a
660 * MIDI message (msg_len bytes long)
661 *
662 * Messages sent: Active Sense, Note On, Poly Pressure, Control Change.
663 */
664 static void snd_usbmidi_akai_input(struct snd_usb_midi_in_endpoint *ep,
665 uint8_t *buffer, int buffer_length)
666 {
667 unsigned int pos = 0;
668 unsigned int len = (unsigned int)buffer_length;
669 while (pos < len) {
670 unsigned int port = (buffer[pos] >> 4) - 1;
671 unsigned int msg_len = buffer[pos] & 0x0f;
672 pos++;
673 if (pos + msg_len <= len && port < 2)
674 snd_usbmidi_input_data(ep, 0, &buffer[pos], msg_len);
675 pos += msg_len;
676 }
677 }
678
679 #define MAX_AKAI_SYSEX_LEN 9
680
681 static void snd_usbmidi_akai_output(struct snd_usb_midi_out_endpoint *ep,
682 struct urb *urb)
683 {
684 uint8_t *msg;
685 int pos, end, count, buf_end;
686 uint8_t tmp[MAX_AKAI_SYSEX_LEN];
687 struct snd_rawmidi_substream *substream = ep->ports[0].substream;
688
689 if (!ep->ports[0].active)
690 return;
691
692 msg = urb->transfer_buffer + urb->transfer_buffer_length;
693 buf_end = ep->max_transfer - MAX_AKAI_SYSEX_LEN - 1;
694
695 /* only try adding more data when there's space for at least 1 SysEx */
696 while (urb->transfer_buffer_length < buf_end) {
697 count = snd_rawmidi_transmit_peek(substream,
698 tmp, MAX_AKAI_SYSEX_LEN);
699 if (!count) {
700 ep->ports[0].active = 0;
701 return;
702 }
703 /* try to skip non-SysEx data */
704 for (pos = 0; pos < count && tmp[pos] != 0xF0; pos++)
705 ;
706
707 if (pos > 0) {
708 snd_rawmidi_transmit_ack(substream, pos);
709 continue;
710 }
711
712 /* look for the start or end marker */
713 for (end = 1; end < count && tmp[end] < 0xF0; end++)
714 ;
715
716 /* next SysEx started before the end of current one */
717 if (end < count && tmp[end] == 0xF0) {
718 /* it's incomplete - drop it */
719 snd_rawmidi_transmit_ack(substream, end);
720 continue;
721 }
722 /* SysEx complete */
723 if (end < count && tmp[end] == 0xF7) {
724 /* queue it, ack it, and get the next one */
725 count = end + 1;
726 msg[0] = 0x10 | count;
727 memcpy(&msg[1], tmp, count);
728 snd_rawmidi_transmit_ack(substream, count);
729 urb->transfer_buffer_length += count + 1;
730 msg += count + 1;
731 continue;
732 }
733 /* less than 9 bytes and no end byte - wait for more */
734 if (count < MAX_AKAI_SYSEX_LEN) {
735 ep->ports[0].active = 0;
736 return;
737 }
738 /* 9 bytes and no end marker in sight - malformed, skip it */
739 snd_rawmidi_transmit_ack(substream, count);
740 }
741 }
742
743 static struct usb_protocol_ops snd_usbmidi_akai_ops = {
744 .input = snd_usbmidi_akai_input,
745 .output = snd_usbmidi_akai_output,
746 };
747
748 /*
749 * Novation USB MIDI protocol: number of data bytes is in the first byte
750 * (when receiving) (+1!) or in the second byte (when sending); data begins
751 * at the third byte.
752 */
753
754 static void snd_usbmidi_novation_input(struct snd_usb_midi_in_endpoint* ep,
755 uint8_t* buffer, int buffer_length)
756 {
757 if (buffer_length < 2 || !buffer[0] || buffer_length < buffer[0] + 1)
758 return;
759 snd_usbmidi_input_data(ep, 0, &buffer[2], buffer[0] - 1);
760 }
761
762 static void snd_usbmidi_novation_output(struct snd_usb_midi_out_endpoint* ep,
763 struct urb *urb)
764 {
765 uint8_t* transfer_buffer;
766 int count;
767
768 if (!ep->ports[0].active)
769 return;
770 transfer_buffer = urb->transfer_buffer;
771 count = snd_rawmidi_transmit(ep->ports[0].substream,
772 &transfer_buffer[2],
773 ep->max_transfer - 2);
774 if (count < 1) {
775 ep->ports[0].active = 0;
776 return;
777 }
778 transfer_buffer[0] = 0;
779 transfer_buffer[1] = count;
780 urb->transfer_buffer_length = 2 + count;
781 }
782
783 static struct usb_protocol_ops snd_usbmidi_novation_ops = {
784 .input = snd_usbmidi_novation_input,
785 .output = snd_usbmidi_novation_output,
786 };
787
788 /*
789 * "raw" protocol: just move raw MIDI bytes from/to the endpoint
790 */
791
792 static void snd_usbmidi_raw_input(struct snd_usb_midi_in_endpoint* ep,
793 uint8_t* buffer, int buffer_length)
794 {
795 snd_usbmidi_input_data(ep, 0, buffer, buffer_length);
796 }
797
798 static void snd_usbmidi_raw_output(struct snd_usb_midi_out_endpoint* ep,
799 struct urb *urb)
800 {
801 int count;
802
803 if (!ep->ports[0].active)
804 return;
805 count = snd_rawmidi_transmit(ep->ports[0].substream,
806 urb->transfer_buffer,
807 ep->max_transfer);
808 if (count < 1) {
809 ep->ports[0].active = 0;
810 return;
811 }
812 urb->transfer_buffer_length = count;
813 }
814
815 static struct usb_protocol_ops snd_usbmidi_raw_ops = {
816 .input = snd_usbmidi_raw_input,
817 .output = snd_usbmidi_raw_output,
818 };
819
820 /*
821 * FTDI protocol: raw MIDI bytes, but input packets have two modem status bytes.
822 */
823
824 static void snd_usbmidi_ftdi_input(struct snd_usb_midi_in_endpoint* ep,
825 uint8_t* buffer, int buffer_length)
826 {
827 if (buffer_length > 2)
828 snd_usbmidi_input_data(ep, 0, buffer + 2, buffer_length - 2);
829 }
830
831 static struct usb_protocol_ops snd_usbmidi_ftdi_ops = {
832 .input = snd_usbmidi_ftdi_input,
833 .output = snd_usbmidi_raw_output,
834 };
835
836 static void snd_usbmidi_us122l_input(struct snd_usb_midi_in_endpoint *ep,
837 uint8_t *buffer, int buffer_length)
838 {
839 if (buffer_length != 9)
840 return;
841 buffer_length = 8;
842 while (buffer_length && buffer[buffer_length - 1] == 0xFD)
843 buffer_length--;
844 if (buffer_length)
845 snd_usbmidi_input_data(ep, 0, buffer, buffer_length);
846 }
847
848 static void snd_usbmidi_us122l_output(struct snd_usb_midi_out_endpoint *ep,
849 struct urb *urb)
850 {
851 int count;
852
853 if (!ep->ports[0].active)
854 return;
855 switch (snd_usb_get_speed(ep->umidi->dev)) {
856 case USB_SPEED_HIGH:
857 case USB_SPEED_SUPER:
858 count = 1;
859 break;
860 default:
861 count = 2;
862 }
863 count = snd_rawmidi_transmit(ep->ports[0].substream,
864 urb->transfer_buffer,
865 count);
866 if (count < 1) {
867 ep->ports[0].active = 0;
868 return;
869 }
870
871 memset(urb->transfer_buffer + count, 0xFD, ep->max_transfer - count);
872 urb->transfer_buffer_length = ep->max_transfer;
873 }
874
875 static struct usb_protocol_ops snd_usbmidi_122l_ops = {
876 .input = snd_usbmidi_us122l_input,
877 .output = snd_usbmidi_us122l_output,
878 };
879
880 /*
881 * Emagic USB MIDI protocol: raw MIDI with "F5 xx" port switching.
882 */
883
884 static void snd_usbmidi_emagic_init_out(struct snd_usb_midi_out_endpoint* ep)
885 {
886 static const u8 init_data[] = {
887 /* initialization magic: "get version" */
888 0xf0,
889 0x00, 0x20, 0x31, /* Emagic */
890 0x64, /* Unitor8 */
891 0x0b, /* version number request */
892 0x00, /* command version */
893 0x00, /* EEPROM, box 0 */
894 0xf7
895 };
896 send_bulk_static_data(ep, init_data, sizeof(init_data));
897 /* while we're at it, pour on more magic */
898 send_bulk_static_data(ep, init_data, sizeof(init_data));
899 }
900
901 static void snd_usbmidi_emagic_finish_out(struct snd_usb_midi_out_endpoint* ep)
902 {
903 static const u8 finish_data[] = {
904 /* switch to patch mode with last preset */
905 0xf0,
906 0x00, 0x20, 0x31, /* Emagic */
907 0x64, /* Unitor8 */
908 0x10, /* patch switch command */
909 0x00, /* command version */
910 0x7f, /* to all boxes */
911 0x40, /* last preset in EEPROM */
912 0xf7
913 };
914 send_bulk_static_data(ep, finish_data, sizeof(finish_data));
915 }
916
917 static void snd_usbmidi_emagic_input(struct snd_usb_midi_in_endpoint* ep,
918 uint8_t* buffer, int buffer_length)
919 {
920 int i;
921
922 /* FF indicates end of valid data */
923 for (i = 0; i < buffer_length; ++i)
924 if (buffer[i] == 0xff) {
925 buffer_length = i;
926 break;
927 }
928
929 /* handle F5 at end of last buffer */
930 if (ep->seen_f5)
931 goto switch_port;
932
933 while (buffer_length > 0) {
934 /* determine size of data until next F5 */
935 for (i = 0; i < buffer_length; ++i)
936 if (buffer[i] == 0xf5)
937 break;
938 snd_usbmidi_input_data(ep, ep->current_port, buffer, i);
939 buffer += i;
940 buffer_length -= i;
941
942 if (buffer_length <= 0)
943 break;
944 /* assert(buffer[0] == 0xf5); */
945 ep->seen_f5 = 1;
946 ++buffer;
947 --buffer_length;
948
949 switch_port:
950 if (buffer_length <= 0)
951 break;
952 if (buffer[0] < 0x80) {
953 ep->current_port = (buffer[0] - 1) & 15;
954 ++buffer;
955 --buffer_length;
956 }
957 ep->seen_f5 = 0;
958 }
959 }
960
961 static void snd_usbmidi_emagic_output(struct snd_usb_midi_out_endpoint* ep,
962 struct urb *urb)
963 {
964 int port0 = ep->current_port;
965 uint8_t* buf = urb->transfer_buffer;
966 int buf_free = ep->max_transfer;
967 int length, i;
968
969 for (i = 0; i < 0x10; ++i) {
970 /* round-robin, starting at the last current port */
971 int portnum = (port0 + i) & 15;
972 struct usbmidi_out_port* port = &ep->ports[portnum];
973
974 if (!port->active)
975 continue;
976 if (snd_rawmidi_transmit_peek(port->substream, buf, 1) != 1) {
977 port->active = 0;
978 continue;
979 }
980
981 if (portnum != ep->current_port) {
982 if (buf_free < 2)
983 break;
984 ep->current_port = portnum;
985 buf[0] = 0xf5;
986 buf[1] = (portnum + 1) & 15;
987 buf += 2;
988 buf_free -= 2;
989 }
990
991 if (buf_free < 1)
992 break;
993 length = snd_rawmidi_transmit(port->substream, buf, buf_free);
994 if (length > 0) {
995 buf += length;
996 buf_free -= length;
997 if (buf_free < 1)
998 break;
999 }
1000 }
1001 if (buf_free < ep->max_transfer && buf_free > 0) {
1002 *buf = 0xff;
1003 --buf_free;
1004 }
1005 urb->transfer_buffer_length = ep->max_transfer - buf_free;
1006 }
1007
1008 static struct usb_protocol_ops snd_usbmidi_emagic_ops = {
1009 .input = snd_usbmidi_emagic_input,
1010 .output = snd_usbmidi_emagic_output,
1011 .init_out_endpoint = snd_usbmidi_emagic_init_out,
1012 .finish_out_endpoint = snd_usbmidi_emagic_finish_out,
1013 };
1014
1015
1016 static void update_roland_altsetting(struct snd_usb_midi* umidi)
1017 {
1018 struct usb_interface *intf;
1019 struct usb_host_interface *hostif;
1020 struct usb_interface_descriptor *intfd;
1021 int is_light_load;
1022
1023 intf = umidi->iface;
1024 is_light_load = intf->cur_altsetting != intf->altsetting;
1025 if (umidi->roland_load_ctl->private_value == is_light_load)
1026 return;
1027 hostif = &intf->altsetting[umidi->roland_load_ctl->private_value];
1028 intfd = get_iface_desc(hostif);
1029 snd_usbmidi_input_stop(&umidi->list);
1030 usb_set_interface(umidi->dev, intfd->bInterfaceNumber,
1031 intfd->bAlternateSetting);
1032 snd_usbmidi_input_start(&umidi->list);
1033 }
1034
1035 static void substream_open(struct snd_rawmidi_substream *substream, int open)
1036 {
1037 struct snd_usb_midi* umidi = substream->rmidi->private_data;
1038 struct snd_kcontrol *ctl;
1039
1040 mutex_lock(&umidi->mutex);
1041 if (open) {
1042 if (umidi->opened++ == 0 && umidi->roland_load_ctl) {
1043 ctl = umidi->roland_load_ctl;
1044 ctl->vd[0].access |= SNDRV_CTL_ELEM_ACCESS_INACTIVE;
1045 snd_ctl_notify(umidi->card,
1046 SNDRV_CTL_EVENT_MASK_INFO, &ctl->id);
1047 update_roland_altsetting(umidi);
1048 }
1049 } else {
1050 if (--umidi->opened == 0 && umidi->roland_load_ctl) {
1051 ctl = umidi->roland_load_ctl;
1052 ctl->vd[0].access &= ~SNDRV_CTL_ELEM_ACCESS_INACTIVE;
1053 snd_ctl_notify(umidi->card,
1054 SNDRV_CTL_EVENT_MASK_INFO, &ctl->id);
1055 }
1056 }
1057 mutex_unlock(&umidi->mutex);
1058 }
1059
1060 static int snd_usbmidi_output_open(struct snd_rawmidi_substream *substream)
1061 {
1062 struct snd_usb_midi* umidi = substream->rmidi->private_data;
1063 struct usbmidi_out_port* port = NULL;
1064 int i, j;
1065 int err;
1066
1067 for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i)
1068 if (umidi->endpoints[i].out)
1069 for (j = 0; j < 0x10; ++j)
1070 if (umidi->endpoints[i].out->ports[j].substream == substream) {
1071 port = &umidi->endpoints[i].out->ports[j];
1072 break;
1073 }
1074 if (!port) {
1075 snd_BUG();
1076 return -ENXIO;
1077 }
1078 err = usb_autopm_get_interface(umidi->iface);
1079 if (err < 0)
1080 return -EIO;
1081 substream->runtime->private_data = port;
1082 port->state = STATE_UNKNOWN;
1083 substream_open(substream, 1);
1084 return 0;
1085 }
1086
1087 static int snd_usbmidi_output_close(struct snd_rawmidi_substream *substream)
1088 {
1089 struct snd_usb_midi* umidi = substream->rmidi->private_data;
1090
1091 substream_open(substream, 0);
1092 usb_autopm_put_interface(umidi->iface);
1093 return 0;
1094 }
1095
1096 static void snd_usbmidi_output_trigger(struct snd_rawmidi_substream *substream, int up)
1097 {
1098 struct usbmidi_out_port* port = (struct usbmidi_out_port*)substream->runtime->private_data;
1099
1100 port->active = up;
1101 if (up) {
1102 if (port->ep->umidi->disconnected) {
1103 /* gobble up remaining bytes to prevent wait in
1104 * snd_rawmidi_drain_output */
1105 while (!snd_rawmidi_transmit_empty(substream))
1106 snd_rawmidi_transmit_ack(substream, 1);
1107 return;
1108 }
1109 tasklet_schedule(&port->ep->tasklet);
1110 }
1111 }
1112
1113 static void snd_usbmidi_output_drain(struct snd_rawmidi_substream *substream)
1114 {
1115 struct usbmidi_out_port* port = substream->runtime->private_data;
1116 struct snd_usb_midi_out_endpoint *ep = port->ep;
1117 unsigned int drain_urbs;
1118 DEFINE_WAIT(wait);
1119 long timeout = msecs_to_jiffies(50);
1120
1121 if (ep->umidi->disconnected)
1122 return;
1123 /*
1124 * The substream buffer is empty, but some data might still be in the
1125 * currently active URBs, so we have to wait for those to complete.
1126 */
1127 spin_lock_irq(&ep->buffer_lock);
1128 drain_urbs = ep->active_urbs;
1129 if (drain_urbs) {
1130 ep->drain_urbs |= drain_urbs;
1131 do {
1132 prepare_to_wait(&ep->drain_wait, &wait,
1133 TASK_UNINTERRUPTIBLE);
1134 spin_unlock_irq(&ep->buffer_lock);
1135 timeout = schedule_timeout(timeout);
1136 spin_lock_irq(&ep->buffer_lock);
1137 drain_urbs &= ep->drain_urbs;
1138 } while (drain_urbs && timeout);
1139 finish_wait(&ep->drain_wait, &wait);
1140 }
1141 spin_unlock_irq(&ep->buffer_lock);
1142 }
1143
1144 static int snd_usbmidi_input_open(struct snd_rawmidi_substream *substream)
1145 {
1146 substream_open(substream, 1);
1147 return 0;
1148 }
1149
1150 static int snd_usbmidi_input_close(struct snd_rawmidi_substream *substream)
1151 {
1152 substream_open(substream, 0);
1153 return 0;
1154 }
1155
1156 static void snd_usbmidi_input_trigger(struct snd_rawmidi_substream *substream, int up)
1157 {
1158 struct snd_usb_midi* umidi = substream->rmidi->private_data;
1159
1160 if (up)
1161 set_bit(substream->number, &umidi->input_triggered);
1162 else
1163 clear_bit(substream->number, &umidi->input_triggered);
1164 }
1165
1166 static struct snd_rawmidi_ops snd_usbmidi_output_ops = {
1167 .open = snd_usbmidi_output_open,
1168 .close = snd_usbmidi_output_close,
1169 .trigger = snd_usbmidi_output_trigger,
1170 .drain = snd_usbmidi_output_drain,
1171 };
1172
1173 static struct snd_rawmidi_ops snd_usbmidi_input_ops = {
1174 .open = snd_usbmidi_input_open,
1175 .close = snd_usbmidi_input_close,
1176 .trigger = snd_usbmidi_input_trigger
1177 };
1178
1179 static void free_urb_and_buffer(struct snd_usb_midi *umidi, struct urb *urb,
1180 unsigned int buffer_length)
1181 {
1182 usb_free_coherent(umidi->dev, buffer_length,
1183 urb->transfer_buffer, urb->transfer_dma);
1184 usb_free_urb(urb);
1185 }
1186
1187 /*
1188 * Frees an input endpoint.
1189 * May be called when ep hasn't been initialized completely.
1190 */
1191 static void snd_usbmidi_in_endpoint_delete(struct snd_usb_midi_in_endpoint* ep)
1192 {
1193 unsigned int i;
1194
1195 for (i = 0; i < INPUT_URBS; ++i)
1196 if (ep->urbs[i])
1197 free_urb_and_buffer(ep->umidi, ep->urbs[i],
1198 ep->urbs[i]->transfer_buffer_length);
1199 kfree(ep);
1200 }
1201
1202 /*
1203 * Creates an input endpoint.
1204 */
1205 static int snd_usbmidi_in_endpoint_create(struct snd_usb_midi* umidi,
1206 struct snd_usb_midi_endpoint_info* ep_info,
1207 struct snd_usb_midi_endpoint* rep)
1208 {
1209 struct snd_usb_midi_in_endpoint* ep;
1210 void* buffer;
1211 unsigned int pipe;
1212 int length;
1213 unsigned int i;
1214
1215 rep->in = NULL;
1216 ep = kzalloc(sizeof(*ep), GFP_KERNEL);
1217 if (!ep)
1218 return -ENOMEM;
1219 ep->umidi = umidi;
1220
1221 for (i = 0; i < INPUT_URBS; ++i) {
1222 ep->urbs[i] = usb_alloc_urb(0, GFP_KERNEL);
1223 if (!ep->urbs[i]) {
1224 snd_usbmidi_in_endpoint_delete(ep);
1225 return -ENOMEM;
1226 }
1227 }
1228 if (ep_info->in_interval)
1229 pipe = usb_rcvintpipe(umidi->dev, ep_info->in_ep);
1230 else
1231 pipe = usb_rcvbulkpipe(umidi->dev, ep_info->in_ep);
1232 length = usb_maxpacket(umidi->dev, pipe, 0);
1233 for (i = 0; i < INPUT_URBS; ++i) {
1234 buffer = usb_alloc_coherent(umidi->dev, length, GFP_KERNEL,
1235 &ep->urbs[i]->transfer_dma);
1236 if (!buffer) {
1237 snd_usbmidi_in_endpoint_delete(ep);
1238 return -ENOMEM;
1239 }
1240 if (ep_info->in_interval)
1241 usb_fill_int_urb(ep->urbs[i], umidi->dev,
1242 pipe, buffer, length,
1243 snd_usbmidi_in_urb_complete,
1244 ep, ep_info->in_interval);
1245 else
1246 usb_fill_bulk_urb(ep->urbs[i], umidi->dev,
1247 pipe, buffer, length,
1248 snd_usbmidi_in_urb_complete, ep);
1249 ep->urbs[i]->transfer_flags = URB_NO_TRANSFER_DMA_MAP;
1250 }
1251
1252 rep->in = ep;
1253 return 0;
1254 }
1255
1256 /*
1257 * Frees an output endpoint.
1258 * May be called when ep hasn't been initialized completely.
1259 */
1260 static void snd_usbmidi_out_endpoint_clear(struct snd_usb_midi_out_endpoint *ep)
1261 {
1262 unsigned int i;
1263
1264 for (i = 0; i < OUTPUT_URBS; ++i)
1265 if (ep->urbs[i].urb) {
1266 free_urb_and_buffer(ep->umidi, ep->urbs[i].urb,
1267 ep->max_transfer);
1268 ep->urbs[i].urb = NULL;
1269 }
1270 }
1271
1272 static void snd_usbmidi_out_endpoint_delete(struct snd_usb_midi_out_endpoint *ep)
1273 {
1274 snd_usbmidi_out_endpoint_clear(ep);
1275 kfree(ep);
1276 }
1277
1278 /*
1279 * Creates an output endpoint, and initializes output ports.
1280 */
1281 static int snd_usbmidi_out_endpoint_create(struct snd_usb_midi* umidi,
1282 struct snd_usb_midi_endpoint_info* ep_info,
1283 struct snd_usb_midi_endpoint* rep)
1284 {
1285 struct snd_usb_midi_out_endpoint* ep;
1286 unsigned int i;
1287 unsigned int pipe;
1288 void* buffer;
1289
1290 rep->out = NULL;
1291 ep = kzalloc(sizeof(*ep), GFP_KERNEL);
1292 if (!ep)
1293 return -ENOMEM;
1294 ep->umidi = umidi;
1295
1296 for (i = 0; i < OUTPUT_URBS; ++i) {
1297 ep->urbs[i].urb = usb_alloc_urb(0, GFP_KERNEL);
1298 if (!ep->urbs[i].urb) {
1299 snd_usbmidi_out_endpoint_delete(ep);
1300 return -ENOMEM;
1301 }
1302 ep->urbs[i].ep = ep;
1303 }
1304 if (ep_info->out_interval)
1305 pipe = usb_sndintpipe(umidi->dev, ep_info->out_ep);
1306 else
1307 pipe = usb_sndbulkpipe(umidi->dev, ep_info->out_ep);
1308 switch (umidi->usb_id) {
1309 default:
1310 ep->max_transfer = usb_maxpacket(umidi->dev, pipe, 1);
1311 break;
1312 /*
1313 * Various chips declare a packet size larger than 4 bytes, but
1314 * do not actually work with larger packets:
1315 */
1316 case USB_ID(0x0a92, 0x1020): /* ESI M4U */
1317 case USB_ID(0x1430, 0x474b): /* RedOctane GH MIDI INTERFACE */
1318 case USB_ID(0x15ca, 0x0101): /* Textech USB Midi Cable */
1319 case USB_ID(0x15ca, 0x1806): /* Textech USB Midi Cable */
1320 case USB_ID(0x1a86, 0x752d): /* QinHeng CH345 "USB2.0-MIDI" */
1321 case USB_ID(0xfc08, 0x0101): /* Unknown vendor Cable */
1322 ep->max_transfer = 4;
1323 break;
1324 /*
1325 * Some devices only work with 9 bytes packet size:
1326 */
1327 case USB_ID(0x0644, 0x800E): /* Tascam US-122L */
1328 case USB_ID(0x0644, 0x800F): /* Tascam US-144 */
1329 ep->max_transfer = 9;
1330 break;
1331 }
1332 for (i = 0; i < OUTPUT_URBS; ++i) {
1333 buffer = usb_alloc_coherent(umidi->dev,
1334 ep->max_transfer, GFP_KERNEL,
1335 &ep->urbs[i].urb->transfer_dma);
1336 if (!buffer) {
1337 snd_usbmidi_out_endpoint_delete(ep);
1338 return -ENOMEM;
1339 }
1340 if (ep_info->out_interval)
1341 usb_fill_int_urb(ep->urbs[i].urb, umidi->dev,
1342 pipe, buffer, ep->max_transfer,
1343 snd_usbmidi_out_urb_complete,
1344 &ep->urbs[i], ep_info->out_interval);
1345 else
1346 usb_fill_bulk_urb(ep->urbs[i].urb, umidi->dev,
1347 pipe, buffer, ep->max_transfer,
1348 snd_usbmidi_out_urb_complete,
1349 &ep->urbs[i]);
1350 ep->urbs[i].urb->transfer_flags = URB_NO_TRANSFER_DMA_MAP;
1351 }
1352
1353 spin_lock_init(&ep->buffer_lock);
1354 tasklet_init(&ep->tasklet, snd_usbmidi_out_tasklet, (unsigned long)ep);
1355 init_waitqueue_head(&ep->drain_wait);
1356
1357 for (i = 0; i < 0x10; ++i)
1358 if (ep_info->out_cables & (1 << i)) {
1359 ep->ports[i].ep = ep;
1360 ep->ports[i].cable = i << 4;
1361 }
1362
1363 if (umidi->usb_protocol_ops->init_out_endpoint)
1364 umidi->usb_protocol_ops->init_out_endpoint(ep);
1365
1366 rep->out = ep;
1367 return 0;
1368 }
1369
1370 /*
1371 * Frees everything.
1372 */
1373 static void snd_usbmidi_free(struct snd_usb_midi* umidi)
1374 {
1375 int i;
1376
1377 for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i) {
1378 struct snd_usb_midi_endpoint* ep = &umidi->endpoints[i];
1379 if (ep->out)
1380 snd_usbmidi_out_endpoint_delete(ep->out);
1381 if (ep->in)
1382 snd_usbmidi_in_endpoint_delete(ep->in);
1383 }
1384 mutex_destroy(&umidi->mutex);
1385 kfree(umidi);
1386 }
1387
1388 /*
1389 * Unlinks all URBs (must be done before the usb_device is deleted).
1390 */
1391 void snd_usbmidi_disconnect(struct list_head* p)
1392 {
1393 struct snd_usb_midi* umidi;
1394 unsigned int i, j;
1395
1396 umidi = list_entry(p, struct snd_usb_midi, list);
1397 /*
1398 * an URB's completion handler may start the timer and
1399 * a timer may submit an URB. To reliably break the cycle
1400 * a flag under lock must be used
1401 */
1402 spin_lock_irq(&umidi->disc_lock);
1403 umidi->disconnected = 1;
1404 spin_unlock_irq(&umidi->disc_lock);
1405 for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i) {
1406 struct snd_usb_midi_endpoint* ep = &umidi->endpoints[i];
1407 if (ep->out)
1408 tasklet_kill(&ep->out->tasklet);
1409 if (ep->out) {
1410 for (j = 0; j < OUTPUT_URBS; ++j)
1411 usb_kill_urb(ep->out->urbs[j].urb);
1412 if (umidi->usb_protocol_ops->finish_out_endpoint)
1413 umidi->usb_protocol_ops->finish_out_endpoint(ep->out);
1414 ep->out->active_urbs = 0;
1415 if (ep->out->drain_urbs) {
1416 ep->out->drain_urbs = 0;
1417 wake_up(&ep->out->drain_wait);
1418 }
1419 }
1420 if (ep->in)
1421 for (j = 0; j < INPUT_URBS; ++j)
1422 usb_kill_urb(ep->in->urbs[j]);
1423 /* free endpoints here; later call can result in Oops */
1424 if (ep->out)
1425 snd_usbmidi_out_endpoint_clear(ep->out);
1426 if (ep->in) {
1427 snd_usbmidi_in_endpoint_delete(ep->in);
1428 ep->in = NULL;
1429 }
1430 }
1431 del_timer_sync(&umidi->error_timer);
1432 }
1433
1434 static void snd_usbmidi_rawmidi_free(struct snd_rawmidi *rmidi)
1435 {
1436 struct snd_usb_midi* umidi = rmidi->private_data;
1437 snd_usbmidi_free(umidi);
1438 }
1439
1440 static struct snd_rawmidi_substream *snd_usbmidi_find_substream(struct snd_usb_midi* umidi,
1441 int stream, int number)
1442 {
1443 struct list_head* list;
1444
1445 list_for_each(list, &umidi->rmidi->streams[stream].substreams) {
1446 struct snd_rawmidi_substream *substream = list_entry(list, struct snd_rawmidi_substream, list);
1447 if (substream->number == number)
1448 return substream;
1449 }
1450 return NULL;
1451 }
1452
1453 /*
1454 * This list specifies names for ports that do not fit into the standard
1455 * "(product) MIDI (n)" schema because they aren't external MIDI ports,
1456 * such as internal control or synthesizer ports.
1457 */
1458 static struct port_info {
1459 u32 id;
1460 short int port;
1461 short int voices;
1462 const char *name;
1463 unsigned int seq_flags;
1464 } snd_usbmidi_port_info[] = {
1465 #define PORT_INFO(vendor, product, num, name_, voices_, flags) \
1466 { .id = USB_ID(vendor, product), \
1467 .port = num, .voices = voices_, \
1468 .name = name_, .seq_flags = flags }
1469 #define EXTERNAL_PORT(vendor, product, num, name) \
1470 PORT_INFO(vendor, product, num, name, 0, \
1471 SNDRV_SEQ_PORT_TYPE_MIDI_GENERIC | \
1472 SNDRV_SEQ_PORT_TYPE_HARDWARE | \
1473 SNDRV_SEQ_PORT_TYPE_PORT)
1474 #define CONTROL_PORT(vendor, product, num, name) \
1475 PORT_INFO(vendor, product, num, name, 0, \
1476 SNDRV_SEQ_PORT_TYPE_MIDI_GENERIC | \
1477 SNDRV_SEQ_PORT_TYPE_HARDWARE)
1478 #define ROLAND_SYNTH_PORT(vendor, product, num, name, voices) \
1479 PORT_INFO(vendor, product, num, name, voices, \
1480 SNDRV_SEQ_PORT_TYPE_MIDI_GENERIC | \
1481 SNDRV_SEQ_PORT_TYPE_MIDI_GM | \
1482 SNDRV_SEQ_PORT_TYPE_MIDI_GM2 | \
1483 SNDRV_SEQ_PORT_TYPE_MIDI_GS | \
1484 SNDRV_SEQ_PORT_TYPE_MIDI_XG | \
1485 SNDRV_SEQ_PORT_TYPE_HARDWARE | \
1486 SNDRV_SEQ_PORT_TYPE_SYNTHESIZER)
1487 #define SOUNDCANVAS_PORT(vendor, product, num, name, voices) \
1488 PORT_INFO(vendor, product, num, name, voices, \
1489 SNDRV_SEQ_PORT_TYPE_MIDI_GENERIC | \
1490 SNDRV_SEQ_PORT_TYPE_MIDI_GM | \
1491 SNDRV_SEQ_PORT_TYPE_MIDI_GM2 | \
1492 SNDRV_SEQ_PORT_TYPE_MIDI_GS | \
1493 SNDRV_SEQ_PORT_TYPE_MIDI_XG | \
1494 SNDRV_SEQ_PORT_TYPE_MIDI_MT32 | \
1495 SNDRV_SEQ_PORT_TYPE_HARDWARE | \
1496 SNDRV_SEQ_PORT_TYPE_SYNTHESIZER)
1497 /* Roland UA-100 */
1498 CONTROL_PORT(0x0582, 0x0000, 2, "%s Control"),
1499 /* Roland SC-8850 */
1500 SOUNDCANVAS_PORT(0x0582, 0x0003, 0, "%s Part A", 128),
1501 SOUNDCANVAS_PORT(0x0582, 0x0003, 1, "%s Part B", 128),
1502 SOUNDCANVAS_PORT(0x0582, 0x0003, 2, "%s Part C", 128),
1503 SOUNDCANVAS_PORT(0x0582, 0x0003, 3, "%s Part D", 128),
1504 EXTERNAL_PORT(0x0582, 0x0003, 4, "%s MIDI 1"),
1505 EXTERNAL_PORT(0x0582, 0x0003, 5, "%s MIDI 2"),
1506 /* Roland U-8 */
1507 EXTERNAL_PORT(0x0582, 0x0004, 0, "%s MIDI"),
1508 CONTROL_PORT(0x0582, 0x0004, 1, "%s Control"),
1509 /* Roland SC-8820 */
1510 SOUNDCANVAS_PORT(0x0582, 0x0007, 0, "%s Part A", 64),
1511 SOUNDCANVAS_PORT(0x0582, 0x0007, 1, "%s Part B", 64),
1512 EXTERNAL_PORT(0x0582, 0x0007, 2, "%s MIDI"),
1513 /* Roland SK-500 */
1514 SOUNDCANVAS_PORT(0x0582, 0x000b, 0, "%s Part A", 64),
1515 SOUNDCANVAS_PORT(0x0582, 0x000b, 1, "%s Part B", 64),
1516 EXTERNAL_PORT(0x0582, 0x000b, 2, "%s MIDI"),
1517 /* Roland SC-D70 */
1518 SOUNDCANVAS_PORT(0x0582, 0x000c, 0, "%s Part A", 64),
1519 SOUNDCANVAS_PORT(0x0582, 0x000c, 1, "%s Part B", 64),
1520 EXTERNAL_PORT(0x0582, 0x000c, 2, "%s MIDI"),
1521 /* Edirol UM-880 */
1522 CONTROL_PORT(0x0582, 0x0014, 8, "%s Control"),
1523 /* Edirol SD-90 */
1524 ROLAND_SYNTH_PORT(0x0582, 0x0016, 0, "%s Part A", 128),
1525 ROLAND_SYNTH_PORT(0x0582, 0x0016, 1, "%s Part B", 128),
1526 EXTERNAL_PORT(0x0582, 0x0016, 2, "%s MIDI 1"),
1527 EXTERNAL_PORT(0x0582, 0x0016, 3, "%s MIDI 2"),
1528 /* Edirol UM-550 */
1529 CONTROL_PORT(0x0582, 0x0023, 5, "%s Control"),
1530 /* Edirol SD-20 */
1531 ROLAND_SYNTH_PORT(0x0582, 0x0027, 0, "%s Part A", 64),
1532 ROLAND_SYNTH_PORT(0x0582, 0x0027, 1, "%s Part B", 64),
1533 EXTERNAL_PORT(0x0582, 0x0027, 2, "%s MIDI"),
1534 /* Edirol SD-80 */
1535 ROLAND_SYNTH_PORT(0x0582, 0x0029, 0, "%s Part A", 128),
1536 ROLAND_SYNTH_PORT(0x0582, 0x0029, 1, "%s Part B", 128),
1537 EXTERNAL_PORT(0x0582, 0x0029, 2, "%s MIDI 1"),
1538 EXTERNAL_PORT(0x0582, 0x0029, 3, "%s MIDI 2"),
1539 /* Edirol UA-700 */
1540 EXTERNAL_PORT(0x0582, 0x002b, 0, "%s MIDI"),
1541 CONTROL_PORT(0x0582, 0x002b, 1, "%s Control"),
1542 /* Roland VariOS */
1543 EXTERNAL_PORT(0x0582, 0x002f, 0, "%s MIDI"),
1544 EXTERNAL_PORT(0x0582, 0x002f, 1, "%s External MIDI"),
1545 EXTERNAL_PORT(0x0582, 0x002f, 2, "%s Sync"),
1546 /* Edirol PCR */
1547 EXTERNAL_PORT(0x0582, 0x0033, 0, "%s MIDI"),
1548 EXTERNAL_PORT(0x0582, 0x0033, 1, "%s 1"),
1549 EXTERNAL_PORT(0x0582, 0x0033, 2, "%s 2"),
1550 /* BOSS GS-10 */
1551 EXTERNAL_PORT(0x0582, 0x003b, 0, "%s MIDI"),
1552 CONTROL_PORT(0x0582, 0x003b, 1, "%s Control"),
1553 /* Edirol UA-1000 */
1554 EXTERNAL_PORT(0x0582, 0x0044, 0, "%s MIDI"),
1555 CONTROL_PORT(0x0582, 0x0044, 1, "%s Control"),
1556 /* Edirol UR-80 */
1557 EXTERNAL_PORT(0x0582, 0x0048, 0, "%s MIDI"),
1558 EXTERNAL_PORT(0x0582, 0x0048, 1, "%s 1"),
1559 EXTERNAL_PORT(0x0582, 0x0048, 2, "%s 2"),
1560 /* Edirol PCR-A */
1561 EXTERNAL_PORT(0x0582, 0x004d, 0, "%s MIDI"),
1562 EXTERNAL_PORT(0x0582, 0x004d, 1, "%s 1"),
1563 EXTERNAL_PORT(0x0582, 0x004d, 2, "%s 2"),
1564 /* Edirol UM-3EX */
1565 CONTROL_PORT(0x0582, 0x009a, 3, "%s Control"),
1566 /* M-Audio MidiSport 8x8 */
1567 CONTROL_PORT(0x0763, 0x1031, 8, "%s Control"),
1568 CONTROL_PORT(0x0763, 0x1033, 8, "%s Control"),
1569 /* MOTU Fastlane */
1570 EXTERNAL_PORT(0x07fd, 0x0001, 0, "%s MIDI A"),
1571 EXTERNAL_PORT(0x07fd, 0x0001, 1, "%s MIDI B"),
1572 /* Emagic Unitor8/AMT8/MT4 */
1573 EXTERNAL_PORT(0x086a, 0x0001, 8, "%s Broadcast"),
1574 EXTERNAL_PORT(0x086a, 0x0002, 8, "%s Broadcast"),
1575 EXTERNAL_PORT(0x086a, 0x0003, 4, "%s Broadcast"),
1576 /* Akai MPD16 */
1577 CONTROL_PORT(0x09e8, 0x0062, 0, "%s Control"),
1578 PORT_INFO(0x09e8, 0x0062, 1, "%s MIDI", 0,
1579 SNDRV_SEQ_PORT_TYPE_MIDI_GENERIC |
1580 SNDRV_SEQ_PORT_TYPE_HARDWARE),
1581 /* Access Music Virus TI */
1582 EXTERNAL_PORT(0x133e, 0x0815, 0, "%s MIDI"),
1583 PORT_INFO(0x133e, 0x0815, 1, "%s Synth", 0,
1584 SNDRV_SEQ_PORT_TYPE_MIDI_GENERIC |
1585 SNDRV_SEQ_PORT_TYPE_HARDWARE |
1586 SNDRV_SEQ_PORT_TYPE_SYNTHESIZER),
1587 };
1588
1589 static struct port_info *find_port_info(struct snd_usb_midi* umidi, int number)
1590 {
1591 int i;
1592
1593 for (i = 0; i < ARRAY_SIZE(snd_usbmidi_port_info); ++i) {
1594 if (snd_usbmidi_port_info[i].id == umidi->usb_id &&
1595 snd_usbmidi_port_info[i].port == number)
1596 return &snd_usbmidi_port_info[i];
1597 }
1598 return NULL;
1599 }
1600
1601 static void snd_usbmidi_get_port_info(struct snd_rawmidi *rmidi, int number,
1602 struct snd_seq_port_info *seq_port_info)
1603 {
1604 struct snd_usb_midi *umidi = rmidi->private_data;
1605 struct port_info *port_info;
1606
1607 /* TODO: read port flags from descriptors */
1608 port_info = find_port_info(umidi, number);
1609 if (port_info) {
1610 seq_port_info->type = port_info->seq_flags;
1611 seq_port_info->midi_voices = port_info->voices;
1612 }
1613 }
1614
1615 static void snd_usbmidi_init_substream(struct snd_usb_midi* umidi,
1616 int stream, int number,
1617 struct snd_rawmidi_substream ** rsubstream)
1618 {
1619 struct port_info *port_info;
1620 const char *name_format;
1621
1622 struct snd_rawmidi_substream *substream = snd_usbmidi_find_substream(umidi, stream, number);
1623 if (!substream) {
1624 snd_printd(KERN_ERR "substream %d:%d not found\n", stream, number);
1625 return;
1626 }
1627
1628 /* TODO: read port name from jack descriptor */
1629 port_info = find_port_info(umidi, number);
1630 name_format = port_info ? port_info->name : "%s MIDI %d";
1631 snprintf(substream->name, sizeof(substream->name),
1632 name_format, umidi->card->shortname, number + 1);
1633
1634 *rsubstream = substream;
1635 }
1636
1637 /*
1638 * Creates the endpoints and their ports.
1639 */
1640 static int snd_usbmidi_create_endpoints(struct snd_usb_midi* umidi,
1641 struct snd_usb_midi_endpoint_info* endpoints)
1642 {
1643 int i, j, err;
1644 int out_ports = 0, in_ports = 0;
1645
1646 for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i) {
1647 if (endpoints[i].out_cables) {
1648 err = snd_usbmidi_out_endpoint_create(umidi, &endpoints[i],
1649 &umidi->endpoints[i]);
1650 if (err < 0)
1651 return err;
1652 }
1653 if (endpoints[i].in_cables) {
1654 err = snd_usbmidi_in_endpoint_create(umidi, &endpoints[i],
1655 &umidi->endpoints[i]);
1656 if (err < 0)
1657 return err;
1658 }
1659
1660 for (j = 0; j < 0x10; ++j) {
1661 if (endpoints[i].out_cables & (1 << j)) {
1662 snd_usbmidi_init_substream(umidi, SNDRV_RAWMIDI_STREAM_OUTPUT, out_ports,
1663 &umidi->endpoints[i].out->ports[j].substream);
1664 ++out_ports;
1665 }
1666 if (endpoints[i].in_cables & (1 << j)) {
1667 snd_usbmidi_init_substream(umidi, SNDRV_RAWMIDI_STREAM_INPUT, in_ports,
1668 &umidi->endpoints[i].in->ports[j].substream);
1669 ++in_ports;
1670 }
1671 }
1672 }
1673 snd_printdd(KERN_INFO "created %d output and %d input ports\n",
1674 out_ports, in_ports);
1675 return 0;
1676 }
1677
1678 /*
1679 * Returns MIDIStreaming device capabilities.
1680 */
1681 static int snd_usbmidi_get_ms_info(struct snd_usb_midi* umidi,
1682 struct snd_usb_midi_endpoint_info* endpoints)
1683 {
1684 struct usb_interface* intf;
1685 struct usb_host_interface *hostif;
1686 struct usb_interface_descriptor* intfd;
1687 struct usb_ms_header_descriptor* ms_header;
1688 struct usb_host_endpoint *hostep;
1689 struct usb_endpoint_descriptor* ep;
1690 struct usb_ms_endpoint_descriptor* ms_ep;
1691 int i, epidx;
1692
1693 intf = umidi->iface;
1694 if (!intf)
1695 return -ENXIO;
1696 hostif = &intf->altsetting[0];
1697 intfd = get_iface_desc(hostif);
1698 ms_header = (struct usb_ms_header_descriptor*)hostif->extra;
1699 if (hostif->extralen >= 7 &&
1700 ms_header->bLength >= 7 &&
1701 ms_header->bDescriptorType == USB_DT_CS_INTERFACE &&
1702 ms_header->bDescriptorSubtype == UAC_HEADER)
1703 snd_printdd(KERN_INFO "MIDIStreaming version %02x.%02x\n",
1704 ms_header->bcdMSC[1], ms_header->bcdMSC[0]);
1705 else
1706 snd_printk(KERN_WARNING "MIDIStreaming interface descriptor not found\n");
1707
1708 epidx = 0;
1709 for (i = 0; i < intfd->bNumEndpoints; ++i) {
1710 hostep = &hostif->endpoint[i];
1711 ep = get_ep_desc(hostep);
1712 if (!usb_endpoint_xfer_bulk(ep) && !usb_endpoint_xfer_int(ep))
1713 continue;
1714 ms_ep = (struct usb_ms_endpoint_descriptor*)hostep->extra;
1715 if (hostep->extralen < 4 ||
1716 ms_ep->bLength < 4 ||
1717 ms_ep->bDescriptorType != USB_DT_CS_ENDPOINT ||
1718 ms_ep->bDescriptorSubtype != UAC_MS_GENERAL)
1719 continue;
1720 if (usb_endpoint_dir_out(ep)) {
1721 if (endpoints[epidx].out_ep) {
1722 if (++epidx >= MIDI_MAX_ENDPOINTS) {
1723 snd_printk(KERN_WARNING "too many endpoints\n");
1724 break;
1725 }
1726 }
1727 endpoints[epidx].out_ep = usb_endpoint_num(ep);
1728 if (usb_endpoint_xfer_int(ep))
1729 endpoints[epidx].out_interval = ep->bInterval;
1730 else if (snd_usb_get_speed(umidi->dev) == USB_SPEED_LOW)
1731 /*
1732 * Low speed bulk transfers don't exist, so
1733 * force interrupt transfers for devices like
1734 * ESI MIDI Mate that try to use them anyway.
1735 */
1736 endpoints[epidx].out_interval = 1;
1737 endpoints[epidx].out_cables = (1 << ms_ep->bNumEmbMIDIJack) - 1;
1738 snd_printdd(KERN_INFO "EP %02X: %d jack(s)\n",
1739 ep->bEndpointAddress, ms_ep->bNumEmbMIDIJack);
1740 } else {
1741 if (endpoints[epidx].in_ep) {
1742 if (++epidx >= MIDI_MAX_ENDPOINTS) {
1743 snd_printk(KERN_WARNING "too many endpoints\n");
1744 break;
1745 }
1746 }
1747 endpoints[epidx].in_ep = usb_endpoint_num(ep);
1748 if (usb_endpoint_xfer_int(ep))
1749 endpoints[epidx].in_interval = ep->bInterval;
1750 else if (snd_usb_get_speed(umidi->dev) == USB_SPEED_LOW)
1751 endpoints[epidx].in_interval = 1;
1752 endpoints[epidx].in_cables = (1 << ms_ep->bNumEmbMIDIJack) - 1;
1753 snd_printdd(KERN_INFO "EP %02X: %d jack(s)\n",
1754 ep->bEndpointAddress, ms_ep->bNumEmbMIDIJack);
1755 }
1756 }
1757 return 0;
1758 }
1759
1760 static int roland_load_info(struct snd_kcontrol *kcontrol,
1761 struct snd_ctl_elem_info *info)
1762 {
1763 static const char *const names[] = { "High Load", "Light Load" };
1764
1765 return snd_ctl_enum_info(info, 1, 2, names);
1766 }
1767
1768 static int roland_load_get(struct snd_kcontrol *kcontrol,
1769 struct snd_ctl_elem_value *value)
1770 {
1771 value->value.enumerated.item[0] = kcontrol->private_value;
1772 return 0;
1773 }
1774
1775 static int roland_load_put(struct snd_kcontrol *kcontrol,
1776 struct snd_ctl_elem_value *value)
1777 {
1778 struct snd_usb_midi* umidi = kcontrol->private_data;
1779 int changed;
1780
1781 if (value->value.enumerated.item[0] > 1)
1782 return -EINVAL;
1783 mutex_lock(&umidi->mutex);
1784 changed = value->value.enumerated.item[0] != kcontrol->private_value;
1785 if (changed)
1786 kcontrol->private_value = value->value.enumerated.item[0];
1787 mutex_unlock(&umidi->mutex);
1788 return changed;
1789 }
1790
1791 static struct snd_kcontrol_new roland_load_ctl = {
1792 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
1793 .name = "MIDI Input Mode",
1794 .info = roland_load_info,
1795 .get = roland_load_get,
1796 .put = roland_load_put,
1797 .private_value = 1,
1798 };
1799
1800 /*
1801 * On Roland devices, use the second alternate setting to be able to use
1802 * the interrupt input endpoint.
1803 */
1804 static void snd_usbmidi_switch_roland_altsetting(struct snd_usb_midi* umidi)
1805 {
1806 struct usb_interface* intf;
1807 struct usb_host_interface *hostif;
1808 struct usb_interface_descriptor* intfd;
1809
1810 intf = umidi->iface;
1811 if (!intf || intf->num_altsetting != 2)
1812 return;
1813
1814 hostif = &intf->altsetting[1];
1815 intfd = get_iface_desc(hostif);
1816 if (intfd->bNumEndpoints != 2 ||
1817 (get_endpoint(hostif, 0)->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) != USB_ENDPOINT_XFER_BULK ||
1818 (get_endpoint(hostif, 1)->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) != USB_ENDPOINT_XFER_INT)
1819 return;
1820
1821 snd_printdd(KERN_INFO "switching to altsetting %d with int ep\n",
1822 intfd->bAlternateSetting);
1823 usb_set_interface(umidi->dev, intfd->bInterfaceNumber,
1824 intfd->bAlternateSetting);
1825
1826 umidi->roland_load_ctl = snd_ctl_new1(&roland_load_ctl, umidi);
1827 if (snd_ctl_add(umidi->card, umidi->roland_load_ctl) < 0)
1828 umidi->roland_load_ctl = NULL;
1829 }
1830
1831 /*
1832 * Try to find any usable endpoints in the interface.
1833 */
1834 static int snd_usbmidi_detect_endpoints(struct snd_usb_midi* umidi,
1835 struct snd_usb_midi_endpoint_info* endpoint,
1836 int max_endpoints)
1837 {
1838 struct usb_interface* intf;
1839 struct usb_host_interface *hostif;
1840 struct usb_interface_descriptor* intfd;
1841 struct usb_endpoint_descriptor* epd;
1842 int i, out_eps = 0, in_eps = 0;
1843
1844 if (USB_ID_VENDOR(umidi->usb_id) == 0x0582)
1845 snd_usbmidi_switch_roland_altsetting(umidi);
1846
1847 if (endpoint[0].out_ep || endpoint[0].in_ep)
1848 return 0;
1849
1850 intf = umidi->iface;
1851 if (!intf || intf->num_altsetting < 1)
1852 return -ENOENT;
1853 hostif = intf->cur_altsetting;
1854 intfd = get_iface_desc(hostif);
1855
1856 for (i = 0; i < intfd->bNumEndpoints; ++i) {
1857 epd = get_endpoint(hostif, i);
1858 if (!usb_endpoint_xfer_bulk(epd) &&
1859 !usb_endpoint_xfer_int(epd))
1860 continue;
1861 if (out_eps < max_endpoints &&
1862 usb_endpoint_dir_out(epd)) {
1863 endpoint[out_eps].out_ep = usb_endpoint_num(epd);
1864 if (usb_endpoint_xfer_int(epd))
1865 endpoint[out_eps].out_interval = epd->bInterval;
1866 ++out_eps;
1867 }
1868 if (in_eps < max_endpoints &&
1869 usb_endpoint_dir_in(epd)) {
1870 endpoint[in_eps].in_ep = usb_endpoint_num(epd);
1871 if (usb_endpoint_xfer_int(epd))
1872 endpoint[in_eps].in_interval = epd->bInterval;
1873 ++in_eps;
1874 }
1875 }
1876 return (out_eps || in_eps) ? 0 : -ENOENT;
1877 }
1878
1879 /*
1880 * Detects the endpoints for one-port-per-endpoint protocols.
1881 */
1882 static int snd_usbmidi_detect_per_port_endpoints(struct snd_usb_midi* umidi,
1883 struct snd_usb_midi_endpoint_info* endpoints)
1884 {
1885 int err, i;
1886
1887 err = snd_usbmidi_detect_endpoints(umidi, endpoints, MIDI_MAX_ENDPOINTS);
1888 for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i) {
1889 if (endpoints[i].out_ep)
1890 endpoints[i].out_cables = 0x0001;
1891 if (endpoints[i].in_ep)
1892 endpoints[i].in_cables = 0x0001;
1893 }
1894 return err;
1895 }
1896
1897 /*
1898 * Detects the endpoints and ports of Yamaha devices.
1899 */
1900 static int snd_usbmidi_detect_yamaha(struct snd_usb_midi* umidi,
1901 struct snd_usb_midi_endpoint_info* endpoint)
1902 {
1903 struct usb_interface* intf;
1904 struct usb_host_interface *hostif;
1905 struct usb_interface_descriptor* intfd;
1906 uint8_t* cs_desc;
1907
1908 intf = umidi->iface;
1909 if (!intf)
1910 return -ENOENT;
1911 hostif = intf->altsetting;
1912 intfd = get_iface_desc(hostif);
1913 if (intfd->bNumEndpoints < 1)
1914 return -ENOENT;
1915
1916 /*
1917 * For each port there is one MIDI_IN/OUT_JACK descriptor, not
1918 * necessarily with any useful contents. So simply count 'em.
1919 */
1920 for (cs_desc = hostif->extra;
1921 cs_desc < hostif->extra + hostif->extralen && cs_desc[0] >= 2;
1922 cs_desc += cs_desc[0]) {
1923 if (cs_desc[1] == USB_DT_CS_INTERFACE) {
1924 if (cs_desc[2] == UAC_MIDI_IN_JACK)
1925 endpoint->in_cables = (endpoint->in_cables << 1) | 1;
1926 else if (cs_desc[2] == UAC_MIDI_OUT_JACK)
1927 endpoint->out_cables = (endpoint->out_cables << 1) | 1;
1928 }
1929 }
1930 if (!endpoint->in_cables && !endpoint->out_cables)
1931 return -ENOENT;
1932
1933 return snd_usbmidi_detect_endpoints(umidi, endpoint, 1);
1934 }
1935
1936 /*
1937 * Creates the endpoints and their ports for Midiman devices.
1938 */
1939 static int snd_usbmidi_create_endpoints_midiman(struct snd_usb_midi* umidi,
1940 struct snd_usb_midi_endpoint_info* endpoint)
1941 {
1942 struct snd_usb_midi_endpoint_info ep_info;
1943 struct usb_interface* intf;
1944 struct usb_host_interface *hostif;
1945 struct usb_interface_descriptor* intfd;
1946 struct usb_endpoint_descriptor* epd;
1947 int cable, err;
1948
1949 intf = umidi->iface;
1950 if (!intf)
1951 return -ENOENT;
1952 hostif = intf->altsetting;
1953 intfd = get_iface_desc(hostif);
1954 /*
1955 * The various MidiSport devices have more or less random endpoint
1956 * numbers, so we have to identify the endpoints by their index in
1957 * the descriptor array, like the driver for that other OS does.
1958 *
1959 * There is one interrupt input endpoint for all input ports, one
1960 * bulk output endpoint for even-numbered ports, and one for odd-
1961 * numbered ports. Both bulk output endpoints have corresponding
1962 * input bulk endpoints (at indices 1 and 3) which aren't used.
1963 */
1964 if (intfd->bNumEndpoints < (endpoint->out_cables > 0x0001 ? 5 : 3)) {
1965 snd_printdd(KERN_ERR "not enough endpoints\n");
1966 return -ENOENT;
1967 }
1968
1969 epd = get_endpoint(hostif, 0);
1970 if (!usb_endpoint_dir_in(epd) || !usb_endpoint_xfer_int(epd)) {
1971 snd_printdd(KERN_ERR "endpoint[0] isn't interrupt\n");
1972 return -ENXIO;
1973 }
1974 epd = get_endpoint(hostif, 2);
1975 if (!usb_endpoint_dir_out(epd) || !usb_endpoint_xfer_bulk(epd)) {
1976 snd_printdd(KERN_ERR "endpoint[2] isn't bulk output\n");
1977 return -ENXIO;
1978 }
1979 if (endpoint->out_cables > 0x0001) {
1980 epd = get_endpoint(hostif, 4);
1981 if (!usb_endpoint_dir_out(epd) ||
1982 !usb_endpoint_xfer_bulk(epd)) {
1983 snd_printdd(KERN_ERR "endpoint[4] isn't bulk output\n");
1984 return -ENXIO;
1985 }
1986 }
1987
1988 ep_info.out_ep = get_endpoint(hostif, 2)->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK;
1989 ep_info.out_interval = 0;
1990 ep_info.out_cables = endpoint->out_cables & 0x5555;
1991 err = snd_usbmidi_out_endpoint_create(umidi, &ep_info, &umidi->endpoints[0]);
1992 if (err < 0)
1993 return err;
1994
1995 ep_info.in_ep = get_endpoint(hostif, 0)->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK;
1996 ep_info.in_interval = get_endpoint(hostif, 0)->bInterval;
1997 ep_info.in_cables = endpoint->in_cables;
1998 err = snd_usbmidi_in_endpoint_create(umidi, &ep_info, &umidi->endpoints[0]);
1999 if (err < 0)
2000 return err;
2001
2002 if (endpoint->out_cables > 0x0001) {
2003 ep_info.out_ep = get_endpoint(hostif, 4)->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK;
2004 ep_info.out_cables = endpoint->out_cables & 0xaaaa;
2005 err = snd_usbmidi_out_endpoint_create(umidi, &ep_info, &umidi->endpoints[1]);
2006 if (err < 0)
2007 return err;
2008 }
2009
2010 for (cable = 0; cable < 0x10; ++cable) {
2011 if (endpoint->out_cables & (1 << cable))
2012 snd_usbmidi_init_substream(umidi, SNDRV_RAWMIDI_STREAM_OUTPUT, cable,
2013 &umidi->endpoints[cable & 1].out->ports[cable].substream);
2014 if (endpoint->in_cables & (1 << cable))
2015 snd_usbmidi_init_substream(umidi, SNDRV_RAWMIDI_STREAM_INPUT, cable,
2016 &umidi->endpoints[0].in->ports[cable].substream);
2017 }
2018 return 0;
2019 }
2020
2021 static struct snd_rawmidi_global_ops snd_usbmidi_ops = {
2022 .get_port_info = snd_usbmidi_get_port_info,
2023 };
2024
2025 static int snd_usbmidi_create_rawmidi(struct snd_usb_midi* umidi,
2026 int out_ports, int in_ports)
2027 {
2028 struct snd_rawmidi *rmidi;
2029 int err;
2030
2031 err = snd_rawmidi_new(umidi->card, "USB MIDI",
2032 umidi->next_midi_device++,
2033 out_ports, in_ports, &rmidi);
2034 if (err < 0)
2035 return err;
2036 strcpy(rmidi->name, umidi->card->shortname);
2037 rmidi->info_flags = SNDRV_RAWMIDI_INFO_OUTPUT |
2038 SNDRV_RAWMIDI_INFO_INPUT |
2039 SNDRV_RAWMIDI_INFO_DUPLEX;
2040 rmidi->ops = &snd_usbmidi_ops;
2041 rmidi->private_data = umidi;
2042 rmidi->private_free = snd_usbmidi_rawmidi_free;
2043 snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT, &snd_usbmidi_output_ops);
2044 snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_INPUT, &snd_usbmidi_input_ops);
2045
2046 umidi->rmidi = rmidi;
2047 return 0;
2048 }
2049
2050 /*
2051 * Temporarily stop input.
2052 */
2053 void snd_usbmidi_input_stop(struct list_head* p)
2054 {
2055 struct snd_usb_midi* umidi;
2056 unsigned int i, j;
2057
2058 umidi = list_entry(p, struct snd_usb_midi, list);
2059 for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i) {
2060 struct snd_usb_midi_endpoint* ep = &umidi->endpoints[i];
2061 if (ep->in)
2062 for (j = 0; j < INPUT_URBS; ++j)
2063 usb_kill_urb(ep->in->urbs[j]);
2064 }
2065 }
2066
2067 static void snd_usbmidi_input_start_ep(struct snd_usb_midi_in_endpoint* ep)
2068 {
2069 unsigned int i;
2070
2071 if (!ep)
2072 return;
2073 for (i = 0; i < INPUT_URBS; ++i) {
2074 struct urb* urb = ep->urbs[i];
2075 urb->dev = ep->umidi->dev;
2076 snd_usbmidi_submit_urb(urb, GFP_KERNEL);
2077 }
2078 }
2079
2080 /*
2081 * Resume input after a call to snd_usbmidi_input_stop().
2082 */
2083 void snd_usbmidi_input_start(struct list_head* p)
2084 {
2085 struct snd_usb_midi* umidi;
2086 int i;
2087
2088 umidi = list_entry(p, struct snd_usb_midi, list);
2089 for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i)
2090 snd_usbmidi_input_start_ep(umidi->endpoints[i].in);
2091 }
2092
2093 /*
2094 * Creates and registers everything needed for a MIDI streaming interface.
2095 */
2096 int snd_usbmidi_create(struct snd_card *card,
2097 struct usb_interface* iface,
2098 struct list_head *midi_list,
2099 const struct snd_usb_audio_quirk* quirk)
2100 {
2101 struct snd_usb_midi* umidi;
2102 struct snd_usb_midi_endpoint_info endpoints[MIDI_MAX_ENDPOINTS];
2103 int out_ports, in_ports;
2104 int i, err;
2105
2106 umidi = kzalloc(sizeof(*umidi), GFP_KERNEL);
2107 if (!umidi)
2108 return -ENOMEM;
2109 umidi->dev = interface_to_usbdev(iface);
2110 umidi->card = card;
2111 umidi->iface = iface;
2112 umidi->quirk = quirk;
2113 umidi->usb_protocol_ops = &snd_usbmidi_standard_ops;
2114 init_timer(&umidi->error_timer);
2115 spin_lock_init(&umidi->disc_lock);
2116 mutex_init(&umidi->mutex);
2117 umidi->usb_id = USB_ID(le16_to_cpu(umidi->dev->descriptor.idVendor),
2118 le16_to_cpu(umidi->dev->descriptor.idProduct));
2119 umidi->error_timer.function = snd_usbmidi_error_timer;
2120 umidi->error_timer.data = (unsigned long)umidi;
2121
2122 /* detect the endpoint(s) to use */
2123 memset(endpoints, 0, sizeof(endpoints));
2124 switch (quirk ? quirk->type : QUIRK_MIDI_STANDARD_INTERFACE) {
2125 case QUIRK_MIDI_STANDARD_INTERFACE:
2126 err = snd_usbmidi_get_ms_info(umidi, endpoints);
2127 if (umidi->usb_id == USB_ID(0x0763, 0x0150)) /* M-Audio Uno */
2128 umidi->usb_protocol_ops =
2129 &snd_usbmidi_maudio_broken_running_status_ops;
2130 break;
2131 case QUIRK_MIDI_US122L:
2132 umidi->usb_protocol_ops = &snd_usbmidi_122l_ops;
2133 /* fall through */
2134 case QUIRK_MIDI_FIXED_ENDPOINT:
2135 memcpy(&endpoints[0], quirk->data,
2136 sizeof(struct snd_usb_midi_endpoint_info));
2137 err = snd_usbmidi_detect_endpoints(umidi, &endpoints[0], 1);
2138 break;
2139 case QUIRK_MIDI_YAMAHA:
2140 err = snd_usbmidi_detect_yamaha(umidi, &endpoints[0]);
2141 break;
2142 case QUIRK_MIDI_MIDIMAN:
2143 umidi->usb_protocol_ops = &snd_usbmidi_midiman_ops;
2144 memcpy(&endpoints[0], quirk->data,
2145 sizeof(struct snd_usb_midi_endpoint_info));
2146 err = 0;
2147 break;
2148 case QUIRK_MIDI_NOVATION:
2149 umidi->usb_protocol_ops = &snd_usbmidi_novation_ops;
2150 err = snd_usbmidi_detect_per_port_endpoints(umidi, endpoints);
2151 break;
2152 case QUIRK_MIDI_RAW_BYTES:
2153 umidi->usb_protocol_ops = &snd_usbmidi_raw_ops;
2154 /*
2155 * Interface 1 contains isochronous endpoints, but with the same
2156 * numbers as in interface 0. Since it is interface 1 that the
2157 * USB core has most recently seen, these descriptors are now
2158 * associated with the endpoint numbers. This will foul up our
2159 * attempts to submit bulk/interrupt URBs to the endpoints in
2160 * interface 0, so we have to make sure that the USB core looks
2161 * again at interface 0 by calling usb_set_interface() on it.
2162 */
2163 if (umidi->usb_id == USB_ID(0x07fd, 0x0001)) /* MOTU Fastlane */
2164 usb_set_interface(umidi->dev, 0, 0);
2165 err = snd_usbmidi_detect_per_port_endpoints(umidi, endpoints);
2166 break;
2167 case QUIRK_MIDI_EMAGIC:
2168 umidi->usb_protocol_ops = &snd_usbmidi_emagic_ops;
2169 memcpy(&endpoints[0], quirk->data,
2170 sizeof(struct snd_usb_midi_endpoint_info));
2171 err = snd_usbmidi_detect_endpoints(umidi, &endpoints[0], 1);
2172 break;
2173 case QUIRK_MIDI_CME:
2174 umidi->usb_protocol_ops = &snd_usbmidi_cme_ops;
2175 err = snd_usbmidi_detect_per_port_endpoints(umidi, endpoints);
2176 break;
2177 case QUIRK_MIDI_AKAI:
2178 umidi->usb_protocol_ops = &snd_usbmidi_akai_ops;
2179 err = snd_usbmidi_detect_per_port_endpoints(umidi, endpoints);
2180 /* endpoint 1 is input-only */
2181 endpoints[1].out_cables = 0;
2182 break;
2183 case QUIRK_MIDI_FTDI:
2184 umidi->usb_protocol_ops = &snd_usbmidi_ftdi_ops;
2185
2186 /* set baud rate to 31250 (48 MHz / 16 / 96) */
2187 err = usb_control_msg(umidi->dev, usb_sndctrlpipe(umidi->dev, 0),
2188 3, 0x40, 0x60, 0, NULL, 0, 1000);
2189 if (err < 0)
2190 break;
2191
2192 err = snd_usbmidi_detect_per_port_endpoints(umidi, endpoints);
2193 break;
2194 default:
2195 snd_printd(KERN_ERR "invalid quirk type %d\n", quirk->type);
2196 err = -ENXIO;
2197 break;
2198 }
2199 if (err < 0) {
2200 kfree(umidi);
2201 return err;
2202 }
2203
2204 /* create rawmidi device */
2205 out_ports = 0;
2206 in_ports = 0;
2207 for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i) {
2208 out_ports += hweight16(endpoints[i].out_cables);
2209 in_ports += hweight16(endpoints[i].in_cables);
2210 }
2211 err = snd_usbmidi_create_rawmidi(umidi, out_ports, in_ports);
2212 if (err < 0) {
2213 kfree(umidi);
2214 return err;
2215 }
2216
2217 /* create endpoint/port structures */
2218 if (quirk && quirk->type == QUIRK_MIDI_MIDIMAN)
2219 err = snd_usbmidi_create_endpoints_midiman(umidi, &endpoints[0]);
2220 else
2221 err = snd_usbmidi_create_endpoints(umidi, endpoints);
2222 if (err < 0) {
2223 snd_usbmidi_free(umidi);
2224 return err;
2225 }
2226
2227 list_add_tail(&umidi->list, midi_list);
2228
2229 for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i)
2230 snd_usbmidi_input_start_ep(umidi->endpoints[i].in);
2231 return 0;
2232 }
2233
2234 EXPORT_SYMBOL(snd_usbmidi_create);
2235 EXPORT_SYMBOL(snd_usbmidi_input_stop);
2236 EXPORT_SYMBOL(snd_usbmidi_input_start);
2237 EXPORT_SYMBOL(snd_usbmidi_disconnect);