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[mirror_ubuntu-artful-kernel.git] / sound / usb / usbmidi.c
1 /*
2 * usbmidi.c - ALSA USB MIDI driver
3 *
4 * Copyright (c) 2002-2005 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 <sound/driver.h>
39 #include <linux/kernel.h>
40 #include <linux/types.h>
41 #include <linux/bitops.h>
42 #include <linux/interrupt.h>
43 #include <linux/spinlock.h>
44 #include <linux/string.h>
45 #include <linux/init.h>
46 #include <linux/slab.h>
47 #include <linux/usb.h>
48 #include <sound/core.h>
49 #include <sound/minors.h>
50 #include <sound/rawmidi.h>
51 #include "usbaudio.h"
52
53
54 /*
55 * define this to log all USB packets
56 */
57 /* #define DUMP_PACKETS */
58
59
60 MODULE_AUTHOR("Clemens Ladisch <clemens@ladisch.de>");
61 MODULE_DESCRIPTION("USB Audio/MIDI helper module");
62 MODULE_LICENSE("Dual BSD/GPL");
63
64
65 struct usb_ms_header_descriptor {
66 __u8 bLength;
67 __u8 bDescriptorType;
68 __u8 bDescriptorSubtype;
69 __u8 bcdMSC[2];
70 __le16 wTotalLength;
71 } __attribute__ ((packed));
72
73 struct usb_ms_endpoint_descriptor {
74 __u8 bLength;
75 __u8 bDescriptorType;
76 __u8 bDescriptorSubtype;
77 __u8 bNumEmbMIDIJack;
78 __u8 baAssocJackID[0];
79 } __attribute__ ((packed));
80
81 typedef struct snd_usb_midi snd_usb_midi_t;
82 typedef struct snd_usb_midi_endpoint snd_usb_midi_endpoint_t;
83 typedef struct snd_usb_midi_out_endpoint snd_usb_midi_out_endpoint_t;
84 typedef struct snd_usb_midi_in_endpoint snd_usb_midi_in_endpoint_t;
85 typedef struct usbmidi_out_port usbmidi_out_port_t;
86 typedef struct usbmidi_in_port usbmidi_in_port_t;
87
88 struct usb_protocol_ops {
89 void (*input)(snd_usb_midi_in_endpoint_t*, uint8_t*, int);
90 void (*output)(snd_usb_midi_out_endpoint_t*);
91 void (*output_packet)(struct urb*, uint8_t, uint8_t, uint8_t, uint8_t);
92 void (*init_out_endpoint)(snd_usb_midi_out_endpoint_t*);
93 void (*finish_out_endpoint)(snd_usb_midi_out_endpoint_t*);
94 };
95
96 struct snd_usb_midi {
97 snd_usb_audio_t *chip;
98 struct usb_interface *iface;
99 const snd_usb_audio_quirk_t *quirk;
100 snd_rawmidi_t* rmidi;
101 struct usb_protocol_ops* usb_protocol_ops;
102 struct list_head list;
103
104 struct snd_usb_midi_endpoint {
105 snd_usb_midi_out_endpoint_t *out;
106 snd_usb_midi_in_endpoint_t *in;
107 } endpoints[MIDI_MAX_ENDPOINTS];
108 unsigned long input_triggered;
109 };
110
111 struct snd_usb_midi_out_endpoint {
112 snd_usb_midi_t* umidi;
113 struct urb* urb;
114 int urb_active;
115 int max_transfer; /* size of urb buffer */
116 struct tasklet_struct tasklet;
117
118 spinlock_t buffer_lock;
119
120 struct usbmidi_out_port {
121 snd_usb_midi_out_endpoint_t* ep;
122 snd_rawmidi_substream_t* substream;
123 int active;
124 uint8_t cable; /* cable number << 4 */
125 uint8_t state;
126 #define STATE_UNKNOWN 0
127 #define STATE_1PARAM 1
128 #define STATE_2PARAM_1 2
129 #define STATE_2PARAM_2 3
130 #define STATE_SYSEX_0 4
131 #define STATE_SYSEX_1 5
132 #define STATE_SYSEX_2 6
133 uint8_t data[2];
134 } ports[0x10];
135 int current_port;
136 };
137
138 struct snd_usb_midi_in_endpoint {
139 snd_usb_midi_t* umidi;
140 struct urb* urb;
141 struct usbmidi_in_port {
142 snd_rawmidi_substream_t* substream;
143 } ports[0x10];
144 int seen_f5;
145 int current_port;
146 };
147
148 static void snd_usbmidi_do_output(snd_usb_midi_out_endpoint_t* ep);
149
150 static const uint8_t snd_usbmidi_cin_length[] = {
151 0, 0, 2, 3, 3, 1, 2, 3, 3, 3, 3, 3, 2, 2, 3, 1
152 };
153
154 /*
155 * Submits the URB, with error handling.
156 */
157 static int snd_usbmidi_submit_urb(struct urb* urb, int flags)
158 {
159 int err = usb_submit_urb(urb, flags);
160 if (err < 0 && err != -ENODEV)
161 snd_printk(KERN_ERR "usb_submit_urb: %d\n", err);
162 return err;
163 }
164
165 /*
166 * Error handling for URB completion functions.
167 */
168 static int snd_usbmidi_urb_error(int status)
169 {
170 if (status == -ENOENT)
171 return status; /* killed */
172 if (status == -EILSEQ ||
173 status == -ECONNRESET ||
174 status == -ETIMEDOUT)
175 return -ENODEV; /* device removed/shutdown */
176 snd_printk(KERN_ERR "urb status %d\n", status);
177 return 0; /* continue */
178 }
179
180 /*
181 * Receives a chunk of MIDI data.
182 */
183 static void snd_usbmidi_input_data(snd_usb_midi_in_endpoint_t* ep, int portidx,
184 uint8_t* data, int length)
185 {
186 usbmidi_in_port_t* port = &ep->ports[portidx];
187
188 if (!port->substream) {
189 snd_printd("unexpected port %d!\n", portidx);
190 return;
191 }
192 if (!test_bit(port->substream->number, &ep->umidi->input_triggered))
193 return;
194 snd_rawmidi_receive(port->substream, data, length);
195 }
196
197 #ifdef DUMP_PACKETS
198 static void dump_urb(const char *type, const u8 *data, int length)
199 {
200 snd_printk(KERN_DEBUG "%s packet: [", type);
201 for (; length > 0; ++data, --length)
202 printk(" %02x", *data);
203 printk(" ]\n");
204 }
205 #else
206 #define dump_urb(type, data, length) /* nothing */
207 #endif
208
209 /*
210 * Processes the data read from the device.
211 */
212 static void snd_usbmidi_in_urb_complete(struct urb* urb, struct pt_regs *regs)
213 {
214 snd_usb_midi_in_endpoint_t* ep = urb->context;
215
216 if (urb->status == 0) {
217 dump_urb("received", urb->transfer_buffer, urb->actual_length);
218 ep->umidi->usb_protocol_ops->input(ep, urb->transfer_buffer,
219 urb->actual_length);
220 } else {
221 if (snd_usbmidi_urb_error(urb->status) < 0)
222 return;
223 }
224
225 if (usb_pipe_needs_resubmit(urb->pipe)) {
226 urb->dev = ep->umidi->chip->dev;
227 snd_usbmidi_submit_urb(urb, GFP_ATOMIC);
228 }
229 }
230
231 static void snd_usbmidi_out_urb_complete(struct urb* urb, struct pt_regs *regs)
232 {
233 snd_usb_midi_out_endpoint_t* ep = urb->context;
234
235 spin_lock(&ep->buffer_lock);
236 ep->urb_active = 0;
237 spin_unlock(&ep->buffer_lock);
238 if (urb->status < 0) {
239 if (snd_usbmidi_urb_error(urb->status) < 0)
240 return;
241 }
242 snd_usbmidi_do_output(ep);
243 }
244
245 /*
246 * This is called when some data should be transferred to the device
247 * (from one or more substreams).
248 */
249 static void snd_usbmidi_do_output(snd_usb_midi_out_endpoint_t* ep)
250 {
251 struct urb* urb = ep->urb;
252 unsigned long flags;
253
254 spin_lock_irqsave(&ep->buffer_lock, flags);
255 if (ep->urb_active || ep->umidi->chip->shutdown) {
256 spin_unlock_irqrestore(&ep->buffer_lock, flags);
257 return;
258 }
259
260 urb->transfer_buffer_length = 0;
261 ep->umidi->usb_protocol_ops->output(ep);
262
263 if (urb->transfer_buffer_length > 0) {
264 dump_urb("sending", urb->transfer_buffer,
265 urb->transfer_buffer_length);
266 urb->dev = ep->umidi->chip->dev;
267 ep->urb_active = snd_usbmidi_submit_urb(urb, GFP_ATOMIC) >= 0;
268 }
269 spin_unlock_irqrestore(&ep->buffer_lock, flags);
270 }
271
272 static void snd_usbmidi_out_tasklet(unsigned long data)
273 {
274 snd_usb_midi_out_endpoint_t* ep = (snd_usb_midi_out_endpoint_t *) data;
275
276 snd_usbmidi_do_output(ep);
277 }
278
279 /* helper function to send static data that may not DMA-able */
280 static int send_bulk_static_data(snd_usb_midi_out_endpoint_t* ep,
281 const void *data, int len)
282 {
283 int err;
284 void *buf = kmalloc(len, GFP_KERNEL);
285 if (!buf)
286 return -ENOMEM;
287 memcpy(buf, data, len);
288 dump_urb("sending", buf, len);
289 err = usb_bulk_msg(ep->umidi->chip->dev, ep->urb->pipe, buf, len,
290 NULL, 250);
291 kfree(buf);
292 return err;
293 }
294
295 /*
296 * Standard USB MIDI protocol: see the spec.
297 * Midiman protocol: like the standard protocol, but the control byte is the
298 * fourth byte in each packet, and uses length instead of CIN.
299 */
300
301 static void snd_usbmidi_standard_input(snd_usb_midi_in_endpoint_t* ep,
302 uint8_t* buffer, int buffer_length)
303 {
304 int i;
305
306 for (i = 0; i + 3 < buffer_length; i += 4)
307 if (buffer[i] != 0) {
308 int cable = buffer[i] >> 4;
309 int length = snd_usbmidi_cin_length[buffer[i] & 0x0f];
310 snd_usbmidi_input_data(ep, cable, &buffer[i + 1], length);
311 }
312 }
313
314 static void snd_usbmidi_midiman_input(snd_usb_midi_in_endpoint_t* ep,
315 uint8_t* buffer, int buffer_length)
316 {
317 int i;
318
319 for (i = 0; i + 3 < buffer_length; i += 4)
320 if (buffer[i + 3] != 0) {
321 int port = buffer[i + 3] >> 4;
322 int length = buffer[i + 3] & 3;
323 snd_usbmidi_input_data(ep, port, &buffer[i], length);
324 }
325 }
326
327 /*
328 * Adds one USB MIDI packet to the output buffer.
329 */
330 static void snd_usbmidi_output_standard_packet(struct urb* urb, uint8_t p0,
331 uint8_t p1, uint8_t p2, uint8_t p3)
332 {
333
334 uint8_t* buf = (uint8_t*)urb->transfer_buffer + urb->transfer_buffer_length;
335 buf[0] = p0;
336 buf[1] = p1;
337 buf[2] = p2;
338 buf[3] = p3;
339 urb->transfer_buffer_length += 4;
340 }
341
342 /*
343 * Adds one Midiman packet to the output buffer.
344 */
345 static void snd_usbmidi_output_midiman_packet(struct urb* urb, uint8_t p0,
346 uint8_t p1, uint8_t p2, uint8_t p3)
347 {
348
349 uint8_t* buf = (uint8_t*)urb->transfer_buffer + urb->transfer_buffer_length;
350 buf[0] = p1;
351 buf[1] = p2;
352 buf[2] = p3;
353 buf[3] = (p0 & 0xf0) | snd_usbmidi_cin_length[p0 & 0x0f];
354 urb->transfer_buffer_length += 4;
355 }
356
357 /*
358 * Converts MIDI commands to USB MIDI packets.
359 */
360 static void snd_usbmidi_transmit_byte(usbmidi_out_port_t* port,
361 uint8_t b, struct urb* urb)
362 {
363 uint8_t p0 = port->cable;
364 void (*output_packet)(struct urb*, uint8_t, uint8_t, uint8_t, uint8_t) =
365 port->ep->umidi->usb_protocol_ops->output_packet;
366
367 if (b >= 0xf8) {
368 output_packet(urb, p0 | 0x0f, b, 0, 0);
369 } else if (b >= 0xf0) {
370 switch (b) {
371 case 0xf0:
372 port->data[0] = b;
373 port->state = STATE_SYSEX_1;
374 break;
375 case 0xf1:
376 case 0xf3:
377 port->data[0] = b;
378 port->state = STATE_1PARAM;
379 break;
380 case 0xf2:
381 port->data[0] = b;
382 port->state = STATE_2PARAM_1;
383 break;
384 case 0xf4:
385 case 0xf5:
386 port->state = STATE_UNKNOWN;
387 break;
388 case 0xf6:
389 output_packet(urb, p0 | 0x05, 0xf6, 0, 0);
390 port->state = STATE_UNKNOWN;
391 break;
392 case 0xf7:
393 switch (port->state) {
394 case STATE_SYSEX_0:
395 output_packet(urb, p0 | 0x05, 0xf7, 0, 0);
396 break;
397 case STATE_SYSEX_1:
398 output_packet(urb, p0 | 0x06, port->data[0], 0xf7, 0);
399 break;
400 case STATE_SYSEX_2:
401 output_packet(urb, p0 | 0x07, port->data[0], port->data[1], 0xf7);
402 break;
403 }
404 port->state = STATE_UNKNOWN;
405 break;
406 }
407 } else if (b >= 0x80) {
408 port->data[0] = b;
409 if (b >= 0xc0 && b <= 0xdf)
410 port->state = STATE_1PARAM;
411 else
412 port->state = STATE_2PARAM_1;
413 } else { /* b < 0x80 */
414 switch (port->state) {
415 case STATE_1PARAM:
416 if (port->data[0] < 0xf0) {
417 p0 |= port->data[0] >> 4;
418 } else {
419 p0 |= 0x02;
420 port->state = STATE_UNKNOWN;
421 }
422 output_packet(urb, p0, port->data[0], b, 0);
423 break;
424 case STATE_2PARAM_1:
425 port->data[1] = b;
426 port->state = STATE_2PARAM_2;
427 break;
428 case STATE_2PARAM_2:
429 if (port->data[0] < 0xf0) {
430 p0 |= port->data[0] >> 4;
431 port->state = STATE_2PARAM_1;
432 } else {
433 p0 |= 0x03;
434 port->state = STATE_UNKNOWN;
435 }
436 output_packet(urb, p0, port->data[0], port->data[1], b);
437 break;
438 case STATE_SYSEX_0:
439 port->data[0] = b;
440 port->state = STATE_SYSEX_1;
441 break;
442 case STATE_SYSEX_1:
443 port->data[1] = b;
444 port->state = STATE_SYSEX_2;
445 break;
446 case STATE_SYSEX_2:
447 output_packet(urb, p0 | 0x04, port->data[0], port->data[1], b);
448 port->state = STATE_SYSEX_0;
449 break;
450 }
451 }
452 }
453
454 static void snd_usbmidi_standard_output(snd_usb_midi_out_endpoint_t* ep)
455 {
456 struct urb* urb = ep->urb;
457 int p;
458
459 /* FIXME: lower-numbered ports can starve higher-numbered ports */
460 for (p = 0; p < 0x10; ++p) {
461 usbmidi_out_port_t* port = &ep->ports[p];
462 if (!port->active)
463 continue;
464 while (urb->transfer_buffer_length + 3 < ep->max_transfer) {
465 uint8_t b;
466 if (snd_rawmidi_transmit(port->substream, &b, 1) != 1) {
467 port->active = 0;
468 break;
469 }
470 snd_usbmidi_transmit_byte(port, b, urb);
471 }
472 }
473 }
474
475 static struct usb_protocol_ops snd_usbmidi_standard_ops = {
476 .input = snd_usbmidi_standard_input,
477 .output = snd_usbmidi_standard_output,
478 .output_packet = snd_usbmidi_output_standard_packet,
479 };
480
481 static struct usb_protocol_ops snd_usbmidi_midiman_ops = {
482 .input = snd_usbmidi_midiman_input,
483 .output = snd_usbmidi_standard_output,
484 .output_packet = snd_usbmidi_output_midiman_packet,
485 };
486
487 /*
488 * Novation USB MIDI protocol: number of data bytes is in the first byte
489 * (when receiving) (+1!) or in the second byte (when sending); data begins
490 * at the third byte.
491 */
492
493 static void snd_usbmidi_novation_input(snd_usb_midi_in_endpoint_t* ep,
494 uint8_t* buffer, int buffer_length)
495 {
496 if (buffer_length < 2 || !buffer[0] || buffer_length < buffer[0] + 1)
497 return;
498 snd_usbmidi_input_data(ep, 0, &buffer[2], buffer[0] - 1);
499 }
500
501 static void snd_usbmidi_novation_output(snd_usb_midi_out_endpoint_t* ep)
502 {
503 uint8_t* transfer_buffer;
504 int count;
505
506 if (!ep->ports[0].active)
507 return;
508 transfer_buffer = ep->urb->transfer_buffer;
509 count = snd_rawmidi_transmit(ep->ports[0].substream,
510 &transfer_buffer[2],
511 ep->max_transfer - 2);
512 if (count < 1) {
513 ep->ports[0].active = 0;
514 return;
515 }
516 transfer_buffer[0] = 0;
517 transfer_buffer[1] = count;
518 ep->urb->transfer_buffer_length = 2 + count;
519 }
520
521 static struct usb_protocol_ops snd_usbmidi_novation_ops = {
522 .input = snd_usbmidi_novation_input,
523 .output = snd_usbmidi_novation_output,
524 };
525
526 /*
527 * Mark of the Unicorn USB MIDI protocol: raw MIDI.
528 */
529
530 static void snd_usbmidi_motu_input(snd_usb_midi_in_endpoint_t* ep,
531 uint8_t* buffer, int buffer_length)
532 {
533 snd_usbmidi_input_data(ep, 0, buffer, buffer_length);
534 }
535
536 static void snd_usbmidi_motu_output(snd_usb_midi_out_endpoint_t* ep)
537 {
538 int count;
539
540 if (!ep->ports[0].active)
541 return;
542 count = snd_rawmidi_transmit(ep->ports[0].substream,
543 ep->urb->transfer_buffer,
544 ep->max_transfer);
545 if (count < 1) {
546 ep->ports[0].active = 0;
547 return;
548 }
549 ep->urb->transfer_buffer_length = count;
550 }
551
552 static struct usb_protocol_ops snd_usbmidi_motu_ops = {
553 .input = snd_usbmidi_motu_input,
554 .output = snd_usbmidi_motu_output,
555 };
556
557 /*
558 * Emagic USB MIDI protocol: raw MIDI with "F5 xx" port switching.
559 */
560
561 static void snd_usbmidi_emagic_init_out(snd_usb_midi_out_endpoint_t* ep)
562 {
563 static const u8 init_data[] = {
564 /* initialization magic: "get version" */
565 0xf0,
566 0x00, 0x20, 0x31, /* Emagic */
567 0x64, /* Unitor8 */
568 0x0b, /* version number request */
569 0x00, /* command version */
570 0x00, /* EEPROM, box 0 */
571 0xf7
572 };
573 send_bulk_static_data(ep, init_data, sizeof(init_data));
574 /* while we're at it, pour on more magic */
575 send_bulk_static_data(ep, init_data, sizeof(init_data));
576 }
577
578 static void snd_usbmidi_emagic_finish_out(snd_usb_midi_out_endpoint_t* ep)
579 {
580 static const u8 finish_data[] = {
581 /* switch to patch mode with last preset */
582 0xf0,
583 0x00, 0x20, 0x31, /* Emagic */
584 0x64, /* Unitor8 */
585 0x10, /* patch switch command */
586 0x00, /* command version */
587 0x7f, /* to all boxes */
588 0x40, /* last preset in EEPROM */
589 0xf7
590 };
591 send_bulk_static_data(ep, finish_data, sizeof(finish_data));
592 }
593
594 static void snd_usbmidi_emagic_input(snd_usb_midi_in_endpoint_t* ep,
595 uint8_t* buffer, int buffer_length)
596 {
597 /* ignore padding bytes at end of buffer */
598 while (buffer_length > 0 && buffer[buffer_length - 1] == 0xff)
599 --buffer_length;
600
601 /* handle F5 at end of last buffer */
602 if (ep->seen_f5)
603 goto switch_port;
604
605 while (buffer_length > 0) {
606 int i;
607
608 /* determine size of data until next F5 */
609 for (i = 0; i < buffer_length; ++i)
610 if (buffer[i] == 0xf5)
611 break;
612 snd_usbmidi_input_data(ep, ep->current_port, buffer, i);
613 buffer += i;
614 buffer_length -= i;
615
616 if (buffer_length <= 0)
617 break;
618 /* assert(buffer[0] == 0xf5); */
619 ep->seen_f5 = 1;
620 ++buffer;
621 --buffer_length;
622
623 switch_port:
624 if (buffer_length <= 0)
625 break;
626 if (buffer[0] < 0x80) {
627 ep->current_port = (buffer[0] - 1) & 15;
628 ++buffer;
629 --buffer_length;
630 }
631 ep->seen_f5 = 0;
632 }
633 }
634
635 static void snd_usbmidi_emagic_output(snd_usb_midi_out_endpoint_t* ep)
636 {
637 int port0 = ep->current_port;
638 uint8_t* buf = ep->urb->transfer_buffer;
639 int buf_free = ep->max_transfer;
640 int length, i;
641
642 for (i = 0; i < 0x10; ++i) {
643 /* round-robin, starting at the last current port */
644 int portnum = (port0 + i) & 15;
645 usbmidi_out_port_t* port = &ep->ports[portnum];
646
647 if (!port->active)
648 continue;
649 if (snd_rawmidi_transmit_peek(port->substream, buf, 1) != 1) {
650 port->active = 0;
651 continue;
652 }
653
654 if (portnum != ep->current_port) {
655 if (buf_free < 2)
656 break;
657 ep->current_port = portnum;
658 buf[0] = 0xf5;
659 buf[1] = (portnum + 1) & 15;
660 buf += 2;
661 buf_free -= 2;
662 }
663
664 if (buf_free < 1)
665 break;
666 length = snd_rawmidi_transmit(port->substream, buf, buf_free);
667 if (length > 0) {
668 buf += length;
669 buf_free -= length;
670 if (buf_free < 1)
671 break;
672 }
673 }
674 ep->urb->transfer_buffer_length = ep->max_transfer - buf_free;
675 }
676
677 static struct usb_protocol_ops snd_usbmidi_emagic_ops = {
678 .input = snd_usbmidi_emagic_input,
679 .output = snd_usbmidi_emagic_output,
680 .init_out_endpoint = snd_usbmidi_emagic_init_out,
681 .finish_out_endpoint = snd_usbmidi_emagic_finish_out,
682 };
683
684
685 static int snd_usbmidi_output_open(snd_rawmidi_substream_t* substream)
686 {
687 snd_usb_midi_t* umidi = substream->rmidi->private_data;
688 usbmidi_out_port_t* port = NULL;
689 int i, j;
690
691 for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i)
692 if (umidi->endpoints[i].out)
693 for (j = 0; j < 0x10; ++j)
694 if (umidi->endpoints[i].out->ports[j].substream == substream) {
695 port = &umidi->endpoints[i].out->ports[j];
696 break;
697 }
698 if (!port) {
699 snd_BUG();
700 return -ENXIO;
701 }
702 substream->runtime->private_data = port;
703 port->state = STATE_UNKNOWN;
704 return 0;
705 }
706
707 static int snd_usbmidi_output_close(snd_rawmidi_substream_t* substream)
708 {
709 return 0;
710 }
711
712 static void snd_usbmidi_output_trigger(snd_rawmidi_substream_t* substream, int up)
713 {
714 usbmidi_out_port_t* port = (usbmidi_out_port_t*)substream->runtime->private_data;
715
716 port->active = up;
717 if (up) {
718 if (port->ep->umidi->chip->shutdown) {
719 /* gobble up remaining bytes to prevent wait in
720 * snd_rawmidi_drain_output */
721 while (!snd_rawmidi_transmit_empty(substream))
722 snd_rawmidi_transmit_ack(substream, 1);
723 return;
724 }
725 tasklet_hi_schedule(&port->ep->tasklet);
726 }
727 }
728
729 static int snd_usbmidi_input_open(snd_rawmidi_substream_t* substream)
730 {
731 return 0;
732 }
733
734 static int snd_usbmidi_input_close(snd_rawmidi_substream_t* substream)
735 {
736 return 0;
737 }
738
739 static void snd_usbmidi_input_trigger(snd_rawmidi_substream_t* substream, int up)
740 {
741 snd_usb_midi_t* umidi = substream->rmidi->private_data;
742
743 if (up)
744 set_bit(substream->number, &umidi->input_triggered);
745 else
746 clear_bit(substream->number, &umidi->input_triggered);
747 }
748
749 static snd_rawmidi_ops_t snd_usbmidi_output_ops = {
750 .open = snd_usbmidi_output_open,
751 .close = snd_usbmidi_output_close,
752 .trigger = snd_usbmidi_output_trigger,
753 };
754
755 static snd_rawmidi_ops_t snd_usbmidi_input_ops = {
756 .open = snd_usbmidi_input_open,
757 .close = snd_usbmidi_input_close,
758 .trigger = snd_usbmidi_input_trigger
759 };
760
761 /*
762 * Frees an input endpoint.
763 * May be called when ep hasn't been initialized completely.
764 */
765 static void snd_usbmidi_in_endpoint_delete(snd_usb_midi_in_endpoint_t* ep)
766 {
767 if (ep->urb) {
768 kfree(ep->urb->transfer_buffer);
769 usb_free_urb(ep->urb);
770 }
771 kfree(ep);
772 }
773
774 /*
775 * Creates an input endpoint.
776 */
777 static int snd_usbmidi_in_endpoint_create(snd_usb_midi_t* umidi,
778 snd_usb_midi_endpoint_info_t* ep_info,
779 snd_usb_midi_endpoint_t* rep)
780 {
781 snd_usb_midi_in_endpoint_t* ep;
782 void* buffer;
783 unsigned int pipe;
784 int length;
785
786 rep->in = NULL;
787 ep = kcalloc(1, sizeof(*ep), GFP_KERNEL);
788 if (!ep)
789 return -ENOMEM;
790 ep->umidi = umidi;
791
792 ep->urb = usb_alloc_urb(0, GFP_KERNEL);
793 if (!ep->urb) {
794 snd_usbmidi_in_endpoint_delete(ep);
795 return -ENOMEM;
796 }
797 if (ep_info->in_interval)
798 pipe = usb_rcvintpipe(umidi->chip->dev, ep_info->in_ep);
799 else
800 pipe = usb_rcvbulkpipe(umidi->chip->dev, ep_info->in_ep);
801 length = usb_maxpacket(umidi->chip->dev, pipe, 0);
802 buffer = kmalloc(length, GFP_KERNEL);
803 if (!buffer) {
804 snd_usbmidi_in_endpoint_delete(ep);
805 return -ENOMEM;
806 }
807 if (ep_info->in_interval)
808 usb_fill_int_urb(ep->urb, umidi->chip->dev, pipe, buffer, length,
809 snd_usb_complete_callback(snd_usbmidi_in_urb_complete),
810 ep, ep_info->in_interval);
811 else
812 usb_fill_bulk_urb(ep->urb, umidi->chip->dev, pipe, buffer, length,
813 snd_usb_complete_callback(snd_usbmidi_in_urb_complete),
814 ep);
815
816 rep->in = ep;
817 return 0;
818 }
819
820 static unsigned int snd_usbmidi_count_bits(unsigned int x)
821 {
822 unsigned int bits = 0;
823
824 for (; x; x >>= 1)
825 bits += x & 1;
826 return bits;
827 }
828
829 /*
830 * Frees an output endpoint.
831 * May be called when ep hasn't been initialized completely.
832 */
833 static void snd_usbmidi_out_endpoint_delete(snd_usb_midi_out_endpoint_t* ep)
834 {
835 if (ep->tasklet.func)
836 tasklet_kill(&ep->tasklet);
837 if (ep->urb) {
838 kfree(ep->urb->transfer_buffer);
839 usb_free_urb(ep->urb);
840 }
841 kfree(ep);
842 }
843
844 /*
845 * Creates an output endpoint, and initializes output ports.
846 */
847 static int snd_usbmidi_out_endpoint_create(snd_usb_midi_t* umidi,
848 snd_usb_midi_endpoint_info_t* ep_info,
849 snd_usb_midi_endpoint_t* rep)
850 {
851 snd_usb_midi_out_endpoint_t* ep;
852 int i;
853 unsigned int pipe;
854 void* buffer;
855
856 rep->out = NULL;
857 ep = kcalloc(1, sizeof(*ep), GFP_KERNEL);
858 if (!ep)
859 return -ENOMEM;
860 ep->umidi = umidi;
861
862 ep->urb = usb_alloc_urb(0, GFP_KERNEL);
863 if (!ep->urb) {
864 snd_usbmidi_out_endpoint_delete(ep);
865 return -ENOMEM;
866 }
867 /* we never use interrupt output pipes */
868 pipe = usb_sndbulkpipe(umidi->chip->dev, ep_info->out_ep);
869 ep->max_transfer = usb_maxpacket(umidi->chip->dev, pipe, 1);
870 buffer = kmalloc(ep->max_transfer, GFP_KERNEL);
871 if (!buffer) {
872 snd_usbmidi_out_endpoint_delete(ep);
873 return -ENOMEM;
874 }
875 usb_fill_bulk_urb(ep->urb, umidi->chip->dev, pipe, buffer,
876 ep->max_transfer,
877 snd_usb_complete_callback(snd_usbmidi_out_urb_complete), ep);
878
879 spin_lock_init(&ep->buffer_lock);
880 tasklet_init(&ep->tasklet, snd_usbmidi_out_tasklet, (unsigned long)ep);
881
882 for (i = 0; i < 0x10; ++i)
883 if (ep_info->out_cables & (1 << i)) {
884 ep->ports[i].ep = ep;
885 ep->ports[i].cable = i << 4;
886 }
887
888 if (umidi->usb_protocol_ops->init_out_endpoint)
889 umidi->usb_protocol_ops->init_out_endpoint(ep);
890
891 rep->out = ep;
892 return 0;
893 }
894
895 /*
896 * Frees everything.
897 */
898 static void snd_usbmidi_free(snd_usb_midi_t* umidi)
899 {
900 int i;
901
902 for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i) {
903 snd_usb_midi_endpoint_t* ep = &umidi->endpoints[i];
904 if (ep->out)
905 snd_usbmidi_out_endpoint_delete(ep->out);
906 if (ep->in)
907 snd_usbmidi_in_endpoint_delete(ep->in);
908 }
909 kfree(umidi);
910 }
911
912 /*
913 * Unlinks all URBs (must be done before the usb_device is deleted).
914 */
915 void snd_usbmidi_disconnect(struct list_head* p, struct usb_driver *driver)
916 {
917 snd_usb_midi_t* umidi;
918 int i;
919
920 umidi = list_entry(p, snd_usb_midi_t, list);
921 for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i) {
922 snd_usb_midi_endpoint_t* ep = &umidi->endpoints[i];
923 if (ep->out && ep->out->urb) {
924 usb_kill_urb(ep->out->urb);
925 if (umidi->usb_protocol_ops->finish_out_endpoint)
926 umidi->usb_protocol_ops->finish_out_endpoint(ep->out);
927 }
928 if (ep->in && ep->in->urb)
929 usb_kill_urb(ep->in->urb);
930 }
931 }
932
933 static void snd_usbmidi_rawmidi_free(snd_rawmidi_t* rmidi)
934 {
935 snd_usb_midi_t* umidi = rmidi->private_data;
936 snd_usbmidi_free(umidi);
937 }
938
939 static snd_rawmidi_substream_t* snd_usbmidi_find_substream(snd_usb_midi_t* umidi,
940 int stream, int number)
941 {
942 struct list_head* list;
943
944 list_for_each(list, &umidi->rmidi->streams[stream].substreams) {
945 snd_rawmidi_substream_t* substream = list_entry(list, snd_rawmidi_substream_t, list);
946 if (substream->number == number)
947 return substream;
948 }
949 return NULL;
950 }
951
952 /*
953 * This list specifies names for ports that do not fit into the standard
954 * "(product) MIDI (n)" schema because they aren't external MIDI ports,
955 * such as internal control or synthesizer ports.
956 */
957 static struct {
958 __u16 vendor;
959 __u16 product;
960 int port;
961 const char *name_format;
962 } snd_usbmidi_port_names[] = {
963 /* Roland UA-100 */
964 {0x0582, 0x0000, 2, "%s Control"},
965 /* Roland SC-8850 */
966 {0x0582, 0x0003, 0, "%s Part A"},
967 {0x0582, 0x0003, 1, "%s Part B"},
968 {0x0582, 0x0003, 2, "%s Part C"},
969 {0x0582, 0x0003, 3, "%s Part D"},
970 {0x0582, 0x0003, 4, "%s MIDI 1"},
971 {0x0582, 0x0003, 5, "%s MIDI 2"},
972 /* Roland U-8 */
973 {0x0582, 0x0004, 0, "%s MIDI"},
974 {0x0582, 0x0004, 1, "%s Control"},
975 /* Roland SC-8820 */
976 {0x0582, 0x0007, 0, "%s Part A"},
977 {0x0582, 0x0007, 1, "%s Part B"},
978 {0x0582, 0x0007, 2, "%s MIDI"},
979 /* Roland SK-500 */
980 {0x0582, 0x000b, 0, "%s Part A"},
981 {0x0582, 0x000b, 1, "%s Part B"},
982 {0x0582, 0x000b, 2, "%s MIDI"},
983 /* Roland SC-D70 */
984 {0x0582, 0x000c, 0, "%s Part A"},
985 {0x0582, 0x000c, 1, "%s Part B"},
986 {0x0582, 0x000c, 2, "%s MIDI"},
987 /* Edirol UM-880 */
988 {0x0582, 0x0014, 8, "%s Control"},
989 /* Edirol SD-90 */
990 {0x0582, 0x0016, 0, "%s Part A"},
991 {0x0582, 0x0016, 1, "%s Part B"},
992 {0x0582, 0x0016, 2, "%s MIDI 1"},
993 {0x0582, 0x0016, 3, "%s MIDI 2"},
994 /* Edirol UM-550 */
995 {0x0582, 0x0023, 5, "%s Control"},
996 /* Edirol SD-20 */
997 {0x0582, 0x0027, 0, "%s Part A"},
998 {0x0582, 0x0027, 1, "%s Part B"},
999 {0x0582, 0x0027, 2, "%s MIDI"},
1000 /* Edirol SD-80 */
1001 {0x0582, 0x0029, 0, "%s Part A"},
1002 {0x0582, 0x0029, 1, "%s Part B"},
1003 {0x0582, 0x0029, 2, "%s MIDI 1"},
1004 {0x0582, 0x0029, 3, "%s MIDI 2"},
1005 /* Edirol UA-700 */
1006 {0x0582, 0x002b, 0, "%s MIDI"},
1007 {0x0582, 0x002b, 1, "%s Control"},
1008 /* Roland VariOS */
1009 {0x0582, 0x002f, 0, "%s MIDI"},
1010 {0x0582, 0x002f, 1, "%s External MIDI"},
1011 {0x0582, 0x002f, 2, "%s Sync"},
1012 /* Edirol PCR */
1013 {0x0582, 0x0033, 0, "%s MIDI"},
1014 {0x0582, 0x0033, 1, "%s 1"},
1015 {0x0582, 0x0033, 2, "%s 2"},
1016 /* BOSS GS-10 */
1017 {0x0582, 0x003b, 0, "%s MIDI"},
1018 {0x0582, 0x003b, 1, "%s Control"},
1019 /* Edirol UA-1000 */
1020 {0x0582, 0x0044, 0, "%s MIDI"},
1021 {0x0582, 0x0044, 1, "%s Control"},
1022 /* Edirol UR-80 */
1023 {0x0582, 0x0048, 0, "%s MIDI"},
1024 {0x0582, 0x0048, 1, "%s 1"},
1025 {0x0582, 0x0048, 2, "%s 2"},
1026 /* Edirol PCR-A */
1027 {0x0582, 0x004d, 0, "%s MIDI"},
1028 {0x0582, 0x004d, 1, "%s 1"},
1029 {0x0582, 0x004d, 2, "%s 2"},
1030 /* M-Audio MidiSport 8x8 */
1031 {0x0763, 0x1031, 8, "%s Control"},
1032 {0x0763, 0x1033, 8, "%s Control"},
1033 /* MOTU Fastlane */
1034 {0x07fd, 0x0001, 0, "%s MIDI A"},
1035 {0x07fd, 0x0001, 1, "%s MIDI B"},
1036 /* Emagic Unitor8/AMT8/MT4 */
1037 {0x086a, 0x0001, 8, "%s Broadcast"},
1038 {0x086a, 0x0002, 8, "%s Broadcast"},
1039 {0x086a, 0x0003, 4, "%s Broadcast"},
1040 };
1041
1042 static void snd_usbmidi_init_substream(snd_usb_midi_t* umidi,
1043 int stream, int number,
1044 snd_rawmidi_substream_t** rsubstream)
1045 {
1046 int i;
1047 __u16 vendor, product;
1048 const char *name_format;
1049
1050 snd_rawmidi_substream_t* substream = snd_usbmidi_find_substream(umidi, stream, number);
1051 if (!substream) {
1052 snd_printd(KERN_ERR "substream %d:%d not found\n", stream, number);
1053 return;
1054 }
1055
1056 /* TODO: read port name from jack descriptor */
1057 name_format = "%s MIDI %d";
1058 vendor = le16_to_cpu(umidi->chip->dev->descriptor.idVendor);
1059 product = le16_to_cpu(umidi->chip->dev->descriptor.idProduct);
1060 for (i = 0; i < ARRAY_SIZE(snd_usbmidi_port_names); ++i) {
1061 if (snd_usbmidi_port_names[i].vendor == vendor &&
1062 snd_usbmidi_port_names[i].product == product &&
1063 snd_usbmidi_port_names[i].port == number) {
1064 name_format = snd_usbmidi_port_names[i].name_format;
1065 break;
1066 }
1067 }
1068 snprintf(substream->name, sizeof(substream->name),
1069 name_format, umidi->chip->card->shortname, number + 1);
1070
1071 *rsubstream = substream;
1072 }
1073
1074 /*
1075 * Creates the endpoints and their ports.
1076 */
1077 static int snd_usbmidi_create_endpoints(snd_usb_midi_t* umidi,
1078 snd_usb_midi_endpoint_info_t* endpoints)
1079 {
1080 int i, j, err;
1081 int out_ports = 0, in_ports = 0;
1082
1083 for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i) {
1084 if (endpoints[i].out_cables) {
1085 err = snd_usbmidi_out_endpoint_create(umidi, &endpoints[i],
1086 &umidi->endpoints[i]);
1087 if (err < 0)
1088 return err;
1089 }
1090 if (endpoints[i].in_cables) {
1091 err = snd_usbmidi_in_endpoint_create(umidi, &endpoints[i],
1092 &umidi->endpoints[i]);
1093 if (err < 0)
1094 return err;
1095 }
1096
1097 for (j = 0; j < 0x10; ++j) {
1098 if (endpoints[i].out_cables & (1 << j)) {
1099 snd_usbmidi_init_substream(umidi, SNDRV_RAWMIDI_STREAM_OUTPUT, out_ports,
1100 &umidi->endpoints[i].out->ports[j].substream);
1101 ++out_ports;
1102 }
1103 if (endpoints[i].in_cables & (1 << j)) {
1104 snd_usbmidi_init_substream(umidi, SNDRV_RAWMIDI_STREAM_INPUT, in_ports,
1105 &umidi->endpoints[i].in->ports[j].substream);
1106 ++in_ports;
1107 }
1108 }
1109 }
1110 snd_printdd(KERN_INFO "created %d output and %d input ports\n",
1111 out_ports, in_ports);
1112 return 0;
1113 }
1114
1115 /*
1116 * Returns MIDIStreaming device capabilities.
1117 */
1118 static int snd_usbmidi_get_ms_info(snd_usb_midi_t* umidi,
1119 snd_usb_midi_endpoint_info_t* endpoints)
1120 {
1121 struct usb_interface* intf;
1122 struct usb_host_interface *hostif;
1123 struct usb_interface_descriptor* intfd;
1124 struct usb_ms_header_descriptor* ms_header;
1125 struct usb_host_endpoint *hostep;
1126 struct usb_endpoint_descriptor* ep;
1127 struct usb_ms_endpoint_descriptor* ms_ep;
1128 int i, epidx;
1129
1130 intf = umidi->iface;
1131 if (!intf)
1132 return -ENXIO;
1133 hostif = &intf->altsetting[0];
1134 intfd = get_iface_desc(hostif);
1135 ms_header = (struct usb_ms_header_descriptor*)hostif->extra;
1136 if (hostif->extralen >= 7 &&
1137 ms_header->bLength >= 7 &&
1138 ms_header->bDescriptorType == USB_DT_CS_INTERFACE &&
1139 ms_header->bDescriptorSubtype == HEADER)
1140 snd_printdd(KERN_INFO "MIDIStreaming version %02x.%02x\n",
1141 ms_header->bcdMSC[1], ms_header->bcdMSC[0]);
1142 else
1143 snd_printk(KERN_WARNING "MIDIStreaming interface descriptor not found\n");
1144
1145 epidx = 0;
1146 for (i = 0; i < intfd->bNumEndpoints; ++i) {
1147 hostep = &hostif->endpoint[i];
1148 ep = get_ep_desc(hostep);
1149 if ((ep->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) != USB_ENDPOINT_XFER_BULK &&
1150 (ep->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) != USB_ENDPOINT_XFER_INT)
1151 continue;
1152 ms_ep = (struct usb_ms_endpoint_descriptor*)hostep->extra;
1153 if (hostep->extralen < 4 ||
1154 ms_ep->bLength < 4 ||
1155 ms_ep->bDescriptorType != USB_DT_CS_ENDPOINT ||
1156 ms_ep->bDescriptorSubtype != MS_GENERAL)
1157 continue;
1158 if ((ep->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == USB_DIR_OUT) {
1159 if (endpoints[epidx].out_ep) {
1160 if (++epidx >= MIDI_MAX_ENDPOINTS) {
1161 snd_printk(KERN_WARNING "too many endpoints\n");
1162 break;
1163 }
1164 }
1165 endpoints[epidx].out_ep = ep->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK;
1166 if ((ep->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) == USB_ENDPOINT_XFER_INT)
1167 endpoints[epidx].out_interval = ep->bInterval;
1168 endpoints[epidx].out_cables = (1 << ms_ep->bNumEmbMIDIJack) - 1;
1169 snd_printdd(KERN_INFO "EP %02X: %d jack(s)\n",
1170 ep->bEndpointAddress, ms_ep->bNumEmbMIDIJack);
1171 } else {
1172 if (endpoints[epidx].in_ep) {
1173 if (++epidx >= MIDI_MAX_ENDPOINTS) {
1174 snd_printk(KERN_WARNING "too many endpoints\n");
1175 break;
1176 }
1177 }
1178 endpoints[epidx].in_ep = ep->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK;
1179 if ((ep->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) == USB_ENDPOINT_XFER_INT)
1180 endpoints[epidx].in_interval = ep->bInterval;
1181 endpoints[epidx].in_cables = (1 << ms_ep->bNumEmbMIDIJack) - 1;
1182 snd_printdd(KERN_INFO "EP %02X: %d jack(s)\n",
1183 ep->bEndpointAddress, ms_ep->bNumEmbMIDIJack);
1184 }
1185 }
1186 return 0;
1187 }
1188
1189 /*
1190 * On Roland devices, use the second alternate setting to be able to use
1191 * the interrupt input endpoint.
1192 */
1193 static void snd_usbmidi_switch_roland_altsetting(snd_usb_midi_t* umidi)
1194 {
1195 struct usb_interface* intf;
1196 struct usb_host_interface *hostif;
1197 struct usb_interface_descriptor* intfd;
1198
1199 intf = umidi->iface;
1200 if (!intf || intf->num_altsetting != 2)
1201 return;
1202
1203 hostif = &intf->altsetting[1];
1204 intfd = get_iface_desc(hostif);
1205 if (intfd->bNumEndpoints != 2 ||
1206 (get_endpoint(hostif, 0)->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) != USB_ENDPOINT_XFER_BULK ||
1207 (get_endpoint(hostif, 1)->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) != USB_ENDPOINT_XFER_INT)
1208 return;
1209
1210 snd_printdd(KERN_INFO "switching to altsetting %d with int ep\n",
1211 intfd->bAlternateSetting);
1212 usb_set_interface(umidi->chip->dev, intfd->bInterfaceNumber,
1213 intfd->bAlternateSetting);
1214 }
1215
1216 /*
1217 * Try to find any usable endpoints in the interface.
1218 */
1219 static int snd_usbmidi_detect_endpoints(snd_usb_midi_t* umidi,
1220 snd_usb_midi_endpoint_info_t* endpoint,
1221 int max_endpoints)
1222 {
1223 struct usb_interface* intf;
1224 struct usb_host_interface *hostif;
1225 struct usb_interface_descriptor* intfd;
1226 struct usb_endpoint_descriptor* epd;
1227 int i, out_eps = 0, in_eps = 0;
1228
1229 if (le16_to_cpu(umidi->chip->dev->descriptor.idVendor) == 0x0582)
1230 snd_usbmidi_switch_roland_altsetting(umidi);
1231
1232 intf = umidi->iface;
1233 if (!intf || intf->num_altsetting < 1)
1234 return -ENOENT;
1235 hostif = intf->cur_altsetting;
1236 intfd = get_iface_desc(hostif);
1237
1238 for (i = 0; i < intfd->bNumEndpoints; ++i) {
1239 epd = get_endpoint(hostif, i);
1240 if ((epd->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) != USB_ENDPOINT_XFER_BULK &&
1241 (epd->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) != USB_ENDPOINT_XFER_INT)
1242 continue;
1243 if (out_eps < max_endpoints &&
1244 (epd->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == USB_DIR_OUT) {
1245 endpoint[out_eps].out_ep = epd->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK;
1246 if ((epd->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) == USB_ENDPOINT_XFER_INT)
1247 endpoint[out_eps].out_interval = epd->bInterval;
1248 ++out_eps;
1249 }
1250 if (in_eps < max_endpoints &&
1251 (epd->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == USB_DIR_IN) {
1252 endpoint[in_eps].in_ep = epd->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK;
1253 if ((epd->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) == USB_ENDPOINT_XFER_INT)
1254 endpoint[in_eps].in_interval = epd->bInterval;
1255 ++in_eps;
1256 }
1257 }
1258 return (out_eps || in_eps) ? 0 : -ENOENT;
1259 }
1260
1261 /*
1262 * Detects the endpoints for one-port-per-endpoint protocols.
1263 */
1264 static int snd_usbmidi_detect_per_port_endpoints(snd_usb_midi_t* umidi,
1265 snd_usb_midi_endpoint_info_t* endpoints)
1266 {
1267 int err, i;
1268
1269 err = snd_usbmidi_detect_endpoints(umidi, endpoints, MIDI_MAX_ENDPOINTS);
1270 for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i) {
1271 if (endpoints[i].out_ep)
1272 endpoints[i].out_cables = 0x0001;
1273 if (endpoints[i].in_ep)
1274 endpoints[i].in_cables = 0x0001;
1275 }
1276 return err;
1277 }
1278
1279 /*
1280 * Detects the endpoints and ports of Yamaha devices.
1281 */
1282 static int snd_usbmidi_detect_yamaha(snd_usb_midi_t* umidi,
1283 snd_usb_midi_endpoint_info_t* endpoint)
1284 {
1285 struct usb_interface* intf;
1286 struct usb_host_interface *hostif;
1287 struct usb_interface_descriptor* intfd;
1288 uint8_t* cs_desc;
1289
1290 intf = umidi->iface;
1291 if (!intf)
1292 return -ENOENT;
1293 hostif = intf->altsetting;
1294 intfd = get_iface_desc(hostif);
1295 if (intfd->bNumEndpoints < 1)
1296 return -ENOENT;
1297
1298 /*
1299 * For each port there is one MIDI_IN/OUT_JACK descriptor, not
1300 * necessarily with any useful contents. So simply count 'em.
1301 */
1302 for (cs_desc = hostif->extra;
1303 cs_desc < hostif->extra + hostif->extralen && cs_desc[0] >= 2;
1304 cs_desc += cs_desc[0]) {
1305 if (cs_desc[1] == CS_AUDIO_INTERFACE) {
1306 if (cs_desc[2] == MIDI_IN_JACK)
1307 endpoint->in_cables = (endpoint->in_cables << 1) | 1;
1308 else if (cs_desc[2] == MIDI_OUT_JACK)
1309 endpoint->out_cables = (endpoint->out_cables << 1) | 1;
1310 }
1311 }
1312 if (!endpoint->in_cables && !endpoint->out_cables)
1313 return -ENOENT;
1314
1315 return snd_usbmidi_detect_endpoints(umidi, endpoint, 1);
1316 }
1317
1318 /*
1319 * Creates the endpoints and their ports for Midiman devices.
1320 */
1321 static int snd_usbmidi_create_endpoints_midiman(snd_usb_midi_t* umidi,
1322 snd_usb_midi_endpoint_info_t* endpoint)
1323 {
1324 snd_usb_midi_endpoint_info_t ep_info;
1325 struct usb_interface* intf;
1326 struct usb_host_interface *hostif;
1327 struct usb_interface_descriptor* intfd;
1328 struct usb_endpoint_descriptor* epd;
1329 int cable, err;
1330
1331 intf = umidi->iface;
1332 if (!intf)
1333 return -ENOENT;
1334 hostif = intf->altsetting;
1335 intfd = get_iface_desc(hostif);
1336 /*
1337 * The various MidiSport devices have more or less random endpoint
1338 * numbers, so we have to identify the endpoints by their index in
1339 * the descriptor array, like the driver for that other OS does.
1340 *
1341 * There is one interrupt input endpoint for all input ports, one
1342 * bulk output endpoint for even-numbered ports, and one for odd-
1343 * numbered ports. Both bulk output endpoints have corresponding
1344 * input bulk endpoints (at indices 1 and 3) which aren't used.
1345 */
1346 if (intfd->bNumEndpoints < (endpoint->out_cables > 0x0001 ? 5 : 3)) {
1347 snd_printdd(KERN_ERR "not enough endpoints\n");
1348 return -ENOENT;
1349 }
1350
1351 epd = get_endpoint(hostif, 0);
1352 if ((epd->bEndpointAddress & USB_ENDPOINT_DIR_MASK) != USB_DIR_IN ||
1353 (epd->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) != USB_ENDPOINT_XFER_INT) {
1354 snd_printdd(KERN_ERR "endpoint[0] isn't interrupt\n");
1355 return -ENXIO;
1356 }
1357 epd = get_endpoint(hostif, 2);
1358 if ((epd->bEndpointAddress & USB_ENDPOINT_DIR_MASK) != USB_DIR_OUT ||
1359 (epd->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) != USB_ENDPOINT_XFER_BULK) {
1360 snd_printdd(KERN_ERR "endpoint[2] isn't bulk output\n");
1361 return -ENXIO;
1362 }
1363 if (endpoint->out_cables > 0x0001) {
1364 epd = get_endpoint(hostif, 4);
1365 if ((epd->bEndpointAddress & USB_ENDPOINT_DIR_MASK) != USB_DIR_OUT ||
1366 (epd->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) != USB_ENDPOINT_XFER_BULK) {
1367 snd_printdd(KERN_ERR "endpoint[4] isn't bulk output\n");
1368 return -ENXIO;
1369 }
1370 }
1371
1372 ep_info.out_ep = get_endpoint(hostif, 2)->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK;
1373 ep_info.out_cables = endpoint->out_cables & 0x5555;
1374 err = snd_usbmidi_out_endpoint_create(umidi, &ep_info, &umidi->endpoints[0]);
1375 if (err < 0)
1376 return err;
1377
1378 ep_info.in_ep = get_endpoint(hostif, 0)->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK;
1379 ep_info.in_interval = get_endpoint(hostif, 0)->bInterval;
1380 ep_info.in_cables = endpoint->in_cables;
1381 err = snd_usbmidi_in_endpoint_create(umidi, &ep_info, &umidi->endpoints[0]);
1382 if (err < 0)
1383 return err;
1384
1385 if (endpoint->out_cables > 0x0001) {
1386 ep_info.out_ep = get_endpoint(hostif, 4)->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK;
1387 ep_info.out_cables = endpoint->out_cables & 0xaaaa;
1388 err = snd_usbmidi_out_endpoint_create(umidi, &ep_info, &umidi->endpoints[1]);
1389 if (err < 0)
1390 return err;
1391 }
1392
1393 for (cable = 0; cable < 0x10; ++cable) {
1394 if (endpoint->out_cables & (1 << cable))
1395 snd_usbmidi_init_substream(umidi, SNDRV_RAWMIDI_STREAM_OUTPUT, cable,
1396 &umidi->endpoints[cable & 1].out->ports[cable].substream);
1397 if (endpoint->in_cables & (1 << cable))
1398 snd_usbmidi_init_substream(umidi, SNDRV_RAWMIDI_STREAM_INPUT, cable,
1399 &umidi->endpoints[0].in->ports[cable].substream);
1400 }
1401 return 0;
1402 }
1403
1404 static int snd_usbmidi_create_rawmidi(snd_usb_midi_t* umidi,
1405 int out_ports, int in_ports)
1406 {
1407 snd_rawmidi_t* rmidi;
1408 int err;
1409
1410 err = snd_rawmidi_new(umidi->chip->card, "USB MIDI",
1411 umidi->chip->next_midi_device++,
1412 out_ports, in_ports, &rmidi);
1413 if (err < 0)
1414 return err;
1415 strcpy(rmidi->name, umidi->chip->card->shortname);
1416 rmidi->info_flags = SNDRV_RAWMIDI_INFO_OUTPUT |
1417 SNDRV_RAWMIDI_INFO_INPUT |
1418 SNDRV_RAWMIDI_INFO_DUPLEX;
1419 rmidi->private_data = umidi;
1420 rmidi->private_free = snd_usbmidi_rawmidi_free;
1421 snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT, &snd_usbmidi_output_ops);
1422 snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_INPUT, &snd_usbmidi_input_ops);
1423
1424 umidi->rmidi = rmidi;
1425 return 0;
1426 }
1427
1428 /*
1429 * Temporarily stop input.
1430 */
1431 void snd_usbmidi_input_stop(struct list_head* p)
1432 {
1433 snd_usb_midi_t* umidi;
1434 int i;
1435
1436 umidi = list_entry(p, snd_usb_midi_t, list);
1437 for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i) {
1438 snd_usb_midi_endpoint_t* ep = &umidi->endpoints[i];
1439 if (ep->in)
1440 usb_kill_urb(ep->in->urb);
1441 }
1442 }
1443
1444 static void snd_usbmidi_input_start_ep(snd_usb_midi_in_endpoint_t* ep)
1445 {
1446 if (ep) {
1447 struct urb* urb = ep->urb;
1448 urb->dev = ep->umidi->chip->dev;
1449 snd_usbmidi_submit_urb(urb, GFP_KERNEL);
1450 }
1451 }
1452
1453 /*
1454 * Resume input after a call to snd_usbmidi_input_stop().
1455 */
1456 void snd_usbmidi_input_start(struct list_head* p)
1457 {
1458 snd_usb_midi_t* umidi;
1459 int i;
1460
1461 umidi = list_entry(p, snd_usb_midi_t, list);
1462 for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i)
1463 snd_usbmidi_input_start_ep(umidi->endpoints[i].in);
1464 }
1465
1466 /*
1467 * Creates and registers everything needed for a MIDI streaming interface.
1468 */
1469 int snd_usb_create_midi_interface(snd_usb_audio_t* chip,
1470 struct usb_interface* iface,
1471 const snd_usb_audio_quirk_t* quirk)
1472 {
1473 snd_usb_midi_t* umidi;
1474 snd_usb_midi_endpoint_info_t endpoints[MIDI_MAX_ENDPOINTS];
1475 int out_ports, in_ports;
1476 int i, err;
1477
1478 umidi = kcalloc(1, sizeof(*umidi), GFP_KERNEL);
1479 if (!umidi)
1480 return -ENOMEM;
1481 umidi->chip = chip;
1482 umidi->iface = iface;
1483 umidi->quirk = quirk;
1484 umidi->usb_protocol_ops = &snd_usbmidi_standard_ops;
1485
1486 /* detect the endpoint(s) to use */
1487 memset(endpoints, 0, sizeof(endpoints));
1488 if (!quirk) {
1489 err = snd_usbmidi_get_ms_info(umidi, endpoints);
1490 } else {
1491 switch (quirk->type) {
1492 case QUIRK_MIDI_FIXED_ENDPOINT:
1493 memcpy(&endpoints[0], quirk->data,
1494 sizeof(snd_usb_midi_endpoint_info_t));
1495 err = snd_usbmidi_detect_endpoints(umidi, &endpoints[0], 1);
1496 break;
1497 case QUIRK_MIDI_YAMAHA:
1498 err = snd_usbmidi_detect_yamaha(umidi, &endpoints[0]);
1499 break;
1500 case QUIRK_MIDI_MIDIMAN:
1501 umidi->usb_protocol_ops = &snd_usbmidi_midiman_ops;
1502 memcpy(&endpoints[0], quirk->data,
1503 sizeof(snd_usb_midi_endpoint_info_t));
1504 err = 0;
1505 break;
1506 case QUIRK_MIDI_NOVATION:
1507 umidi->usb_protocol_ops = &snd_usbmidi_novation_ops;
1508 err = snd_usbmidi_detect_per_port_endpoints(umidi, endpoints);
1509 break;
1510 case QUIRK_MIDI_MOTU:
1511 umidi->usb_protocol_ops = &snd_usbmidi_motu_ops;
1512 err = snd_usbmidi_detect_per_port_endpoints(umidi, endpoints);
1513 break;
1514 case QUIRK_MIDI_EMAGIC:
1515 umidi->usb_protocol_ops = &snd_usbmidi_emagic_ops;
1516 memcpy(&endpoints[0], quirk->data,
1517 sizeof(snd_usb_midi_endpoint_info_t));
1518 err = snd_usbmidi_detect_endpoints(umidi, &endpoints[0], 1);
1519 break;
1520 default:
1521 snd_printd(KERN_ERR "invalid quirk type %d\n", quirk->type);
1522 err = -ENXIO;
1523 break;
1524 }
1525 }
1526 if (err < 0) {
1527 kfree(umidi);
1528 return err;
1529 }
1530
1531 /* create rawmidi device */
1532 out_ports = 0;
1533 in_ports = 0;
1534 for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i) {
1535 out_ports += snd_usbmidi_count_bits(endpoints[i].out_cables);
1536 in_ports += snd_usbmidi_count_bits(endpoints[i].in_cables);
1537 }
1538 err = snd_usbmidi_create_rawmidi(umidi, out_ports, in_ports);
1539 if (err < 0) {
1540 kfree(umidi);
1541 return err;
1542 }
1543
1544 /* create endpoint/port structures */
1545 if (quirk && quirk->type == QUIRK_MIDI_MIDIMAN)
1546 err = snd_usbmidi_create_endpoints_midiman(umidi, &endpoints[0]);
1547 else
1548 err = snd_usbmidi_create_endpoints(umidi, endpoints);
1549 if (err < 0) {
1550 snd_usbmidi_free(umidi);
1551 return err;
1552 }
1553
1554 list_add(&umidi->list, &umidi->chip->midi_list);
1555
1556 for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i)
1557 snd_usbmidi_input_start_ep(umidi->endpoints[i].in);
1558 return 0;
1559 }
1560
1561 EXPORT_SYMBOL(snd_usb_create_midi_interface);
1562 EXPORT_SYMBOL(snd_usbmidi_input_stop);
1563 EXPORT_SYMBOL(snd_usbmidi_input_start);
1564 EXPORT_SYMBOL(snd_usbmidi_disconnect);
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