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[ALSA] usb-audio: use usb_buffer_alloc/free
[deliverable/linux.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 * "raw" protocol: used by the MOTU FastLane.
528 */
529
530 static void snd_usbmidi_raw_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_raw_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_raw_ops = {
553 .input = snd_usbmidi_raw_input,
554 .output = snd_usbmidi_raw_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 usb_buffer_free(ep->umidi->chip->dev,
769 ep->urb->transfer_buffer_length,
770 ep->urb->transfer_buffer,
771 ep->urb->transfer_dma);
772 usb_free_urb(ep->urb);
773 }
774 kfree(ep);
775 }
776
777 /*
778 * Creates an input endpoint.
779 */
780 static int snd_usbmidi_in_endpoint_create(snd_usb_midi_t* umidi,
781 snd_usb_midi_endpoint_info_t* ep_info,
782 snd_usb_midi_endpoint_t* rep)
783 {
784 snd_usb_midi_in_endpoint_t* ep;
785 void* buffer;
786 unsigned int pipe;
787 int length;
788
789 rep->in = NULL;
790 ep = kcalloc(1, sizeof(*ep), GFP_KERNEL);
791 if (!ep)
792 return -ENOMEM;
793 ep->umidi = umidi;
794
795 ep->urb = usb_alloc_urb(0, GFP_KERNEL);
796 if (!ep->urb) {
797 snd_usbmidi_in_endpoint_delete(ep);
798 return -ENOMEM;
799 }
800 if (ep_info->in_interval)
801 pipe = usb_rcvintpipe(umidi->chip->dev, ep_info->in_ep);
802 else
803 pipe = usb_rcvbulkpipe(umidi->chip->dev, ep_info->in_ep);
804 length = usb_maxpacket(umidi->chip->dev, pipe, 0);
805 buffer = usb_buffer_alloc(umidi->chip->dev, length, GFP_KERNEL,
806 &ep->urb->transfer_dma);
807 if (!buffer) {
808 snd_usbmidi_in_endpoint_delete(ep);
809 return -ENOMEM;
810 }
811 if (ep_info->in_interval)
812 usb_fill_int_urb(ep->urb, umidi->chip->dev, pipe, buffer, length,
813 snd_usb_complete_callback(snd_usbmidi_in_urb_complete),
814 ep, ep_info->in_interval);
815 else
816 usb_fill_bulk_urb(ep->urb, umidi->chip->dev, pipe, buffer, length,
817 snd_usb_complete_callback(snd_usbmidi_in_urb_complete),
818 ep);
819 ep->urb->transfer_flags = URB_NO_TRANSFER_DMA_MAP;
820
821 rep->in = ep;
822 return 0;
823 }
824
825 static unsigned int snd_usbmidi_count_bits(unsigned int x)
826 {
827 unsigned int bits = 0;
828
829 for (; x; x >>= 1)
830 bits += x & 1;
831 return bits;
832 }
833
834 /*
835 * Frees an output endpoint.
836 * May be called when ep hasn't been initialized completely.
837 */
838 static void snd_usbmidi_out_endpoint_delete(snd_usb_midi_out_endpoint_t* ep)
839 {
840 if (ep->tasklet.func)
841 tasklet_kill(&ep->tasklet);
842 if (ep->urb) {
843 usb_buffer_free(ep->umidi->chip->dev, ep->max_transfer,
844 ep->urb->transfer_buffer,
845 ep->urb->transfer_dma);
846 usb_free_urb(ep->urb);
847 }
848 kfree(ep);
849 }
850
851 /*
852 * Creates an output endpoint, and initializes output ports.
853 */
854 static int snd_usbmidi_out_endpoint_create(snd_usb_midi_t* umidi,
855 snd_usb_midi_endpoint_info_t* ep_info,
856 snd_usb_midi_endpoint_t* rep)
857 {
858 snd_usb_midi_out_endpoint_t* ep;
859 int i;
860 unsigned int pipe;
861 void* buffer;
862
863 rep->out = NULL;
864 ep = kcalloc(1, sizeof(*ep), GFP_KERNEL);
865 if (!ep)
866 return -ENOMEM;
867 ep->umidi = umidi;
868
869 ep->urb = usb_alloc_urb(0, GFP_KERNEL);
870 if (!ep->urb) {
871 snd_usbmidi_out_endpoint_delete(ep);
872 return -ENOMEM;
873 }
874 /* we never use interrupt output pipes */
875 pipe = usb_sndbulkpipe(umidi->chip->dev, ep_info->out_ep);
876 ep->max_transfer = usb_maxpacket(umidi->chip->dev, pipe, 1);
877 buffer = usb_buffer_alloc(umidi->chip->dev, ep->max_transfer,
878 GFP_KERNEL, &ep->urb->transfer_dma);
879 if (!buffer) {
880 snd_usbmidi_out_endpoint_delete(ep);
881 return -ENOMEM;
882 }
883 usb_fill_bulk_urb(ep->urb, umidi->chip->dev, pipe, buffer,
884 ep->max_transfer,
885 snd_usb_complete_callback(snd_usbmidi_out_urb_complete), ep);
886 ep->urb->transfer_flags = URB_NO_TRANSFER_DMA_MAP;
887
888 spin_lock_init(&ep->buffer_lock);
889 tasklet_init(&ep->tasklet, snd_usbmidi_out_tasklet, (unsigned long)ep);
890
891 for (i = 0; i < 0x10; ++i)
892 if (ep_info->out_cables & (1 << i)) {
893 ep->ports[i].ep = ep;
894 ep->ports[i].cable = i << 4;
895 }
896
897 if (umidi->usb_protocol_ops->init_out_endpoint)
898 umidi->usb_protocol_ops->init_out_endpoint(ep);
899
900 rep->out = ep;
901 return 0;
902 }
903
904 /*
905 * Frees everything.
906 */
907 static void snd_usbmidi_free(snd_usb_midi_t* umidi)
908 {
909 int i;
910
911 for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i) {
912 snd_usb_midi_endpoint_t* ep = &umidi->endpoints[i];
913 if (ep->out)
914 snd_usbmidi_out_endpoint_delete(ep->out);
915 if (ep->in)
916 snd_usbmidi_in_endpoint_delete(ep->in);
917 }
918 kfree(umidi);
919 }
920
921 /*
922 * Unlinks all URBs (must be done before the usb_device is deleted).
923 */
924 void snd_usbmidi_disconnect(struct list_head* p)
925 {
926 snd_usb_midi_t* umidi;
927 int i;
928
929 umidi = list_entry(p, snd_usb_midi_t, list);
930 for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i) {
931 snd_usb_midi_endpoint_t* ep = &umidi->endpoints[i];
932 if (ep->out && ep->out->urb) {
933 usb_kill_urb(ep->out->urb);
934 if (umidi->usb_protocol_ops->finish_out_endpoint)
935 umidi->usb_protocol_ops->finish_out_endpoint(ep->out);
936 }
937 if (ep->in && ep->in->urb)
938 usb_kill_urb(ep->in->urb);
939 }
940 }
941
942 static void snd_usbmidi_rawmidi_free(snd_rawmidi_t* rmidi)
943 {
944 snd_usb_midi_t* umidi = rmidi->private_data;
945 snd_usbmidi_free(umidi);
946 }
947
948 static snd_rawmidi_substream_t* snd_usbmidi_find_substream(snd_usb_midi_t* umidi,
949 int stream, int number)
950 {
951 struct list_head* list;
952
953 list_for_each(list, &umidi->rmidi->streams[stream].substreams) {
954 snd_rawmidi_substream_t* substream = list_entry(list, snd_rawmidi_substream_t, list);
955 if (substream->number == number)
956 return substream;
957 }
958 return NULL;
959 }
960
961 /*
962 * This list specifies names for ports that do not fit into the standard
963 * "(product) MIDI (n)" schema because they aren't external MIDI ports,
964 * such as internal control or synthesizer ports.
965 */
966 static struct {
967 u32 id;
968 int port;
969 const char *name_format;
970 } snd_usbmidi_port_names[] = {
971 /* Roland UA-100 */
972 { USB_ID(0x0582, 0x0000), 2, "%s Control" },
973 /* Roland SC-8850 */
974 { USB_ID(0x0582, 0x0003), 0, "%s Part A" },
975 { USB_ID(0x0582, 0x0003), 1, "%s Part B" },
976 { USB_ID(0x0582, 0x0003), 2, "%s Part C" },
977 { USB_ID(0x0582, 0x0003), 3, "%s Part D" },
978 { USB_ID(0x0582, 0x0003), 4, "%s MIDI 1" },
979 { USB_ID(0x0582, 0x0003), 5, "%s MIDI 2" },
980 /* Roland U-8 */
981 { USB_ID(0x0582, 0x0004), 0, "%s MIDI" },
982 { USB_ID(0x0582, 0x0004), 1, "%s Control" },
983 /* Roland SC-8820 */
984 { USB_ID(0x0582, 0x0007), 0, "%s Part A" },
985 { USB_ID(0x0582, 0x0007), 1, "%s Part B" },
986 { USB_ID(0x0582, 0x0007), 2, "%s MIDI" },
987 /* Roland SK-500 */
988 { USB_ID(0x0582, 0x000b), 0, "%s Part A" },
989 { USB_ID(0x0582, 0x000b), 1, "%s Part B" },
990 { USB_ID(0x0582, 0x000b), 2, "%s MIDI" },
991 /* Roland SC-D70 */
992 { USB_ID(0x0582, 0x000c), 0, "%s Part A" },
993 { USB_ID(0x0582, 0x000c), 1, "%s Part B" },
994 { USB_ID(0x0582, 0x000c), 2, "%s MIDI" },
995 /* Edirol UM-880 */
996 { USB_ID(0x0582, 0x0014), 8, "%s Control" },
997 /* Edirol SD-90 */
998 { USB_ID(0x0582, 0x0016), 0, "%s Part A" },
999 { USB_ID(0x0582, 0x0016), 1, "%s Part B" },
1000 { USB_ID(0x0582, 0x0016), 2, "%s MIDI 1" },
1001 { USB_ID(0x0582, 0x0016), 3, "%s MIDI 2" },
1002 /* Edirol UM-550 */
1003 { USB_ID(0x0582, 0x0023), 5, "%s Control" },
1004 /* Edirol SD-20 */
1005 { USB_ID(0x0582, 0x0027), 0, "%s Part A" },
1006 { USB_ID(0x0582, 0x0027), 1, "%s Part B" },
1007 { USB_ID(0x0582, 0x0027), 2, "%s MIDI" },
1008 /* Edirol SD-80 */
1009 { USB_ID(0x0582, 0x0029), 0, "%s Part A" },
1010 { USB_ID(0x0582, 0x0029), 1, "%s Part B" },
1011 { USB_ID(0x0582, 0x0029), 2, "%s MIDI 1" },
1012 { USB_ID(0x0582, 0x0029), 3, "%s MIDI 2" },
1013 /* Edirol UA-700 */
1014 { USB_ID(0x0582, 0x002b), 0, "%s MIDI" },
1015 { USB_ID(0x0582, 0x002b), 1, "%s Control" },
1016 /* Roland VariOS */
1017 { USB_ID(0x0582, 0x002f), 0, "%s MIDI" },
1018 { USB_ID(0x0582, 0x002f), 1, "%s External MIDI" },
1019 { USB_ID(0x0582, 0x002f), 2, "%s Sync" },
1020 /* Edirol PCR */
1021 { USB_ID(0x0582, 0x0033), 0, "%s MIDI" },
1022 { USB_ID(0x0582, 0x0033), 1, "%s 1" },
1023 { USB_ID(0x0582, 0x0033), 2, "%s 2" },
1024 /* BOSS GS-10 */
1025 { USB_ID(0x0582, 0x003b), 0, "%s MIDI" },
1026 { USB_ID(0x0582, 0x003b), 1, "%s Control" },
1027 /* Edirol UA-1000 */
1028 { USB_ID(0x0582, 0x0044), 0, "%s MIDI" },
1029 { USB_ID(0x0582, 0x0044), 1, "%s Control" },
1030 /* Edirol UR-80 */
1031 { USB_ID(0x0582, 0x0048), 0, "%s MIDI" },
1032 { USB_ID(0x0582, 0x0048), 1, "%s 1" },
1033 { USB_ID(0x0582, 0x0048), 2, "%s 2" },
1034 /* Edirol PCR-A */
1035 { USB_ID(0x0582, 0x004d), 0, "%s MIDI" },
1036 { USB_ID(0x0582, 0x004d), 1, "%s 1" },
1037 { USB_ID(0x0582, 0x004d), 2, "%s 2" },
1038 /* M-Audio MidiSport 8x8 */
1039 { USB_ID(0x0763, 0x1031), 8, "%s Control" },
1040 { USB_ID(0x0763, 0x1033), 8, "%s Control" },
1041 /* MOTU Fastlane */
1042 { USB_ID(0x07fd, 0x0001), 0, "%s MIDI A" },
1043 { USB_ID(0x07fd, 0x0001), 1, "%s MIDI B" },
1044 /* Emagic Unitor8/AMT8/MT4 */
1045 { USB_ID(0x086a, 0x0001), 8, "%s Broadcast" },
1046 { USB_ID(0x086a, 0x0002), 8, "%s Broadcast" },
1047 { USB_ID(0x086a, 0x0003), 4, "%s Broadcast" },
1048 };
1049
1050 static void snd_usbmidi_init_substream(snd_usb_midi_t* umidi,
1051 int stream, int number,
1052 snd_rawmidi_substream_t** rsubstream)
1053 {
1054 int i;
1055 const char *name_format;
1056
1057 snd_rawmidi_substream_t* substream = snd_usbmidi_find_substream(umidi, stream, number);
1058 if (!substream) {
1059 snd_printd(KERN_ERR "substream %d:%d not found\n", stream, number);
1060 return;
1061 }
1062
1063 /* TODO: read port name from jack descriptor */
1064 name_format = "%s MIDI %d";
1065 for (i = 0; i < ARRAY_SIZE(snd_usbmidi_port_names); ++i) {
1066 if (snd_usbmidi_port_names[i].id == umidi->chip->usb_id &&
1067 snd_usbmidi_port_names[i].port == number) {
1068 name_format = snd_usbmidi_port_names[i].name_format;
1069 break;
1070 }
1071 }
1072 snprintf(substream->name, sizeof(substream->name),
1073 name_format, umidi->chip->card->shortname, number + 1);
1074
1075 *rsubstream = substream;
1076 }
1077
1078 /*
1079 * Creates the endpoints and their ports.
1080 */
1081 static int snd_usbmidi_create_endpoints(snd_usb_midi_t* umidi,
1082 snd_usb_midi_endpoint_info_t* endpoints)
1083 {
1084 int i, j, err;
1085 int out_ports = 0, in_ports = 0;
1086
1087 for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i) {
1088 if (endpoints[i].out_cables) {
1089 err = snd_usbmidi_out_endpoint_create(umidi, &endpoints[i],
1090 &umidi->endpoints[i]);
1091 if (err < 0)
1092 return err;
1093 }
1094 if (endpoints[i].in_cables) {
1095 err = snd_usbmidi_in_endpoint_create(umidi, &endpoints[i],
1096 &umidi->endpoints[i]);
1097 if (err < 0)
1098 return err;
1099 }
1100
1101 for (j = 0; j < 0x10; ++j) {
1102 if (endpoints[i].out_cables & (1 << j)) {
1103 snd_usbmidi_init_substream(umidi, SNDRV_RAWMIDI_STREAM_OUTPUT, out_ports,
1104 &umidi->endpoints[i].out->ports[j].substream);
1105 ++out_ports;
1106 }
1107 if (endpoints[i].in_cables & (1 << j)) {
1108 snd_usbmidi_init_substream(umidi, SNDRV_RAWMIDI_STREAM_INPUT, in_ports,
1109 &umidi->endpoints[i].in->ports[j].substream);
1110 ++in_ports;
1111 }
1112 }
1113 }
1114 snd_printdd(KERN_INFO "created %d output and %d input ports\n",
1115 out_ports, in_ports);
1116 return 0;
1117 }
1118
1119 /*
1120 * Returns MIDIStreaming device capabilities.
1121 */
1122 static int snd_usbmidi_get_ms_info(snd_usb_midi_t* umidi,
1123 snd_usb_midi_endpoint_info_t* endpoints)
1124 {
1125 struct usb_interface* intf;
1126 struct usb_host_interface *hostif;
1127 struct usb_interface_descriptor* intfd;
1128 struct usb_ms_header_descriptor* ms_header;
1129 struct usb_host_endpoint *hostep;
1130 struct usb_endpoint_descriptor* ep;
1131 struct usb_ms_endpoint_descriptor* ms_ep;
1132 int i, epidx;
1133
1134 intf = umidi->iface;
1135 if (!intf)
1136 return -ENXIO;
1137 hostif = &intf->altsetting[0];
1138 intfd = get_iface_desc(hostif);
1139 ms_header = (struct usb_ms_header_descriptor*)hostif->extra;
1140 if (hostif->extralen >= 7 &&
1141 ms_header->bLength >= 7 &&
1142 ms_header->bDescriptorType == USB_DT_CS_INTERFACE &&
1143 ms_header->bDescriptorSubtype == HEADER)
1144 snd_printdd(KERN_INFO "MIDIStreaming version %02x.%02x\n",
1145 ms_header->bcdMSC[1], ms_header->bcdMSC[0]);
1146 else
1147 snd_printk(KERN_WARNING "MIDIStreaming interface descriptor not found\n");
1148
1149 epidx = 0;
1150 for (i = 0; i < intfd->bNumEndpoints; ++i) {
1151 hostep = &hostif->endpoint[i];
1152 ep = get_ep_desc(hostep);
1153 if ((ep->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) != USB_ENDPOINT_XFER_BULK &&
1154 (ep->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) != USB_ENDPOINT_XFER_INT)
1155 continue;
1156 ms_ep = (struct usb_ms_endpoint_descriptor*)hostep->extra;
1157 if (hostep->extralen < 4 ||
1158 ms_ep->bLength < 4 ||
1159 ms_ep->bDescriptorType != USB_DT_CS_ENDPOINT ||
1160 ms_ep->bDescriptorSubtype != MS_GENERAL)
1161 continue;
1162 if ((ep->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == USB_DIR_OUT) {
1163 if (endpoints[epidx].out_ep) {
1164 if (++epidx >= MIDI_MAX_ENDPOINTS) {
1165 snd_printk(KERN_WARNING "too many endpoints\n");
1166 break;
1167 }
1168 }
1169 endpoints[epidx].out_ep = ep->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK;
1170 if ((ep->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) == USB_ENDPOINT_XFER_INT)
1171 endpoints[epidx].out_interval = ep->bInterval;
1172 endpoints[epidx].out_cables = (1 << ms_ep->bNumEmbMIDIJack) - 1;
1173 snd_printdd(KERN_INFO "EP %02X: %d jack(s)\n",
1174 ep->bEndpointAddress, ms_ep->bNumEmbMIDIJack);
1175 } else {
1176 if (endpoints[epidx].in_ep) {
1177 if (++epidx >= MIDI_MAX_ENDPOINTS) {
1178 snd_printk(KERN_WARNING "too many endpoints\n");
1179 break;
1180 }
1181 }
1182 endpoints[epidx].in_ep = ep->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK;
1183 if ((ep->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) == USB_ENDPOINT_XFER_INT)
1184 endpoints[epidx].in_interval = ep->bInterval;
1185 endpoints[epidx].in_cables = (1 << ms_ep->bNumEmbMIDIJack) - 1;
1186 snd_printdd(KERN_INFO "EP %02X: %d jack(s)\n",
1187 ep->bEndpointAddress, ms_ep->bNumEmbMIDIJack);
1188 }
1189 }
1190 return 0;
1191 }
1192
1193 /*
1194 * On Roland devices, use the second alternate setting to be able to use
1195 * the interrupt input endpoint.
1196 */
1197 static void snd_usbmidi_switch_roland_altsetting(snd_usb_midi_t* umidi)
1198 {
1199 struct usb_interface* intf;
1200 struct usb_host_interface *hostif;
1201 struct usb_interface_descriptor* intfd;
1202
1203 intf = umidi->iface;
1204 if (!intf || intf->num_altsetting != 2)
1205 return;
1206
1207 hostif = &intf->altsetting[1];
1208 intfd = get_iface_desc(hostif);
1209 if (intfd->bNumEndpoints != 2 ||
1210 (get_endpoint(hostif, 0)->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) != USB_ENDPOINT_XFER_BULK ||
1211 (get_endpoint(hostif, 1)->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) != USB_ENDPOINT_XFER_INT)
1212 return;
1213
1214 snd_printdd(KERN_INFO "switching to altsetting %d with int ep\n",
1215 intfd->bAlternateSetting);
1216 usb_set_interface(umidi->chip->dev, intfd->bInterfaceNumber,
1217 intfd->bAlternateSetting);
1218 }
1219
1220 /*
1221 * Try to find any usable endpoints in the interface.
1222 */
1223 static int snd_usbmidi_detect_endpoints(snd_usb_midi_t* umidi,
1224 snd_usb_midi_endpoint_info_t* endpoint,
1225 int max_endpoints)
1226 {
1227 struct usb_interface* intf;
1228 struct usb_host_interface *hostif;
1229 struct usb_interface_descriptor* intfd;
1230 struct usb_endpoint_descriptor* epd;
1231 int i, out_eps = 0, in_eps = 0;
1232
1233 if (USB_ID_VENDOR(umidi->chip->usb_id) == 0x0582)
1234 snd_usbmidi_switch_roland_altsetting(umidi);
1235
1236 if (endpoint[0].out_ep || endpoint[0].in_ep)
1237 return 0;
1238
1239 intf = umidi->iface;
1240 if (!intf || intf->num_altsetting < 1)
1241 return -ENOENT;
1242 hostif = intf->cur_altsetting;
1243 intfd = get_iface_desc(hostif);
1244
1245 for (i = 0; i < intfd->bNumEndpoints; ++i) {
1246 epd = get_endpoint(hostif, i);
1247 if ((epd->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) != USB_ENDPOINT_XFER_BULK &&
1248 (epd->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) != USB_ENDPOINT_XFER_INT)
1249 continue;
1250 if (out_eps < max_endpoints &&
1251 (epd->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == USB_DIR_OUT) {
1252 endpoint[out_eps].out_ep = epd->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK;
1253 if ((epd->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) == USB_ENDPOINT_XFER_INT)
1254 endpoint[out_eps].out_interval = epd->bInterval;
1255 ++out_eps;
1256 }
1257 if (in_eps < max_endpoints &&
1258 (epd->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == USB_DIR_IN) {
1259 endpoint[in_eps].in_ep = epd->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK;
1260 if ((epd->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) == USB_ENDPOINT_XFER_INT)
1261 endpoint[in_eps].in_interval = epd->bInterval;
1262 ++in_eps;
1263 }
1264 }
1265 return (out_eps || in_eps) ? 0 : -ENOENT;
1266 }
1267
1268 /*
1269 * Detects the endpoints for one-port-per-endpoint protocols.
1270 */
1271 static int snd_usbmidi_detect_per_port_endpoints(snd_usb_midi_t* umidi,
1272 snd_usb_midi_endpoint_info_t* endpoints)
1273 {
1274 int err, i;
1275
1276 err = snd_usbmidi_detect_endpoints(umidi, endpoints, MIDI_MAX_ENDPOINTS);
1277 for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i) {
1278 if (endpoints[i].out_ep)
1279 endpoints[i].out_cables = 0x0001;
1280 if (endpoints[i].in_ep)
1281 endpoints[i].in_cables = 0x0001;
1282 }
1283 return err;
1284 }
1285
1286 /*
1287 * Detects the endpoints and ports of Yamaha devices.
1288 */
1289 static int snd_usbmidi_detect_yamaha(snd_usb_midi_t* umidi,
1290 snd_usb_midi_endpoint_info_t* endpoint)
1291 {
1292 struct usb_interface* intf;
1293 struct usb_host_interface *hostif;
1294 struct usb_interface_descriptor* intfd;
1295 uint8_t* cs_desc;
1296
1297 intf = umidi->iface;
1298 if (!intf)
1299 return -ENOENT;
1300 hostif = intf->altsetting;
1301 intfd = get_iface_desc(hostif);
1302 if (intfd->bNumEndpoints < 1)
1303 return -ENOENT;
1304
1305 /*
1306 * For each port there is one MIDI_IN/OUT_JACK descriptor, not
1307 * necessarily with any useful contents. So simply count 'em.
1308 */
1309 for (cs_desc = hostif->extra;
1310 cs_desc < hostif->extra + hostif->extralen && cs_desc[0] >= 2;
1311 cs_desc += cs_desc[0]) {
1312 if (cs_desc[1] == CS_AUDIO_INTERFACE) {
1313 if (cs_desc[2] == MIDI_IN_JACK)
1314 endpoint->in_cables = (endpoint->in_cables << 1) | 1;
1315 else if (cs_desc[2] == MIDI_OUT_JACK)
1316 endpoint->out_cables = (endpoint->out_cables << 1) | 1;
1317 }
1318 }
1319 if (!endpoint->in_cables && !endpoint->out_cables)
1320 return -ENOENT;
1321
1322 return snd_usbmidi_detect_endpoints(umidi, endpoint, 1);
1323 }
1324
1325 /*
1326 * Creates the endpoints and their ports for Midiman devices.
1327 */
1328 static int snd_usbmidi_create_endpoints_midiman(snd_usb_midi_t* umidi,
1329 snd_usb_midi_endpoint_info_t* endpoint)
1330 {
1331 snd_usb_midi_endpoint_info_t ep_info;
1332 struct usb_interface* intf;
1333 struct usb_host_interface *hostif;
1334 struct usb_interface_descriptor* intfd;
1335 struct usb_endpoint_descriptor* epd;
1336 int cable, err;
1337
1338 intf = umidi->iface;
1339 if (!intf)
1340 return -ENOENT;
1341 hostif = intf->altsetting;
1342 intfd = get_iface_desc(hostif);
1343 /*
1344 * The various MidiSport devices have more or less random endpoint
1345 * numbers, so we have to identify the endpoints by their index in
1346 * the descriptor array, like the driver for that other OS does.
1347 *
1348 * There is one interrupt input endpoint for all input ports, one
1349 * bulk output endpoint for even-numbered ports, and one for odd-
1350 * numbered ports. Both bulk output endpoints have corresponding
1351 * input bulk endpoints (at indices 1 and 3) which aren't used.
1352 */
1353 if (intfd->bNumEndpoints < (endpoint->out_cables > 0x0001 ? 5 : 3)) {
1354 snd_printdd(KERN_ERR "not enough endpoints\n");
1355 return -ENOENT;
1356 }
1357
1358 epd = get_endpoint(hostif, 0);
1359 if ((epd->bEndpointAddress & USB_ENDPOINT_DIR_MASK) != USB_DIR_IN ||
1360 (epd->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) != USB_ENDPOINT_XFER_INT) {
1361 snd_printdd(KERN_ERR "endpoint[0] isn't interrupt\n");
1362 return -ENXIO;
1363 }
1364 epd = get_endpoint(hostif, 2);
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[2] isn't bulk output\n");
1368 return -ENXIO;
1369 }
1370 if (endpoint->out_cables > 0x0001) {
1371 epd = get_endpoint(hostif, 4);
1372 if ((epd->bEndpointAddress & USB_ENDPOINT_DIR_MASK) != USB_DIR_OUT ||
1373 (epd->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) != USB_ENDPOINT_XFER_BULK) {
1374 snd_printdd(KERN_ERR "endpoint[4] isn't bulk output\n");
1375 return -ENXIO;
1376 }
1377 }
1378
1379 ep_info.out_ep = get_endpoint(hostif, 2)->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK;
1380 ep_info.out_cables = endpoint->out_cables & 0x5555;
1381 err = snd_usbmidi_out_endpoint_create(umidi, &ep_info, &umidi->endpoints[0]);
1382 if (err < 0)
1383 return err;
1384
1385 ep_info.in_ep = get_endpoint(hostif, 0)->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK;
1386 ep_info.in_interval = get_endpoint(hostif, 0)->bInterval;
1387 ep_info.in_cables = endpoint->in_cables;
1388 err = snd_usbmidi_in_endpoint_create(umidi, &ep_info, &umidi->endpoints[0]);
1389 if (err < 0)
1390 return err;
1391
1392 if (endpoint->out_cables > 0x0001) {
1393 ep_info.out_ep = get_endpoint(hostif, 4)->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK;
1394 ep_info.out_cables = endpoint->out_cables & 0xaaaa;
1395 err = snd_usbmidi_out_endpoint_create(umidi, &ep_info, &umidi->endpoints[1]);
1396 if (err < 0)
1397 return err;
1398 }
1399
1400 for (cable = 0; cable < 0x10; ++cable) {
1401 if (endpoint->out_cables & (1 << cable))
1402 snd_usbmidi_init_substream(umidi, SNDRV_RAWMIDI_STREAM_OUTPUT, cable,
1403 &umidi->endpoints[cable & 1].out->ports[cable].substream);
1404 if (endpoint->in_cables & (1 << cable))
1405 snd_usbmidi_init_substream(umidi, SNDRV_RAWMIDI_STREAM_INPUT, cable,
1406 &umidi->endpoints[0].in->ports[cable].substream);
1407 }
1408 return 0;
1409 }
1410
1411 static int snd_usbmidi_create_rawmidi(snd_usb_midi_t* umidi,
1412 int out_ports, int in_ports)
1413 {
1414 snd_rawmidi_t* rmidi;
1415 int err;
1416
1417 err = snd_rawmidi_new(umidi->chip->card, "USB MIDI",
1418 umidi->chip->next_midi_device++,
1419 out_ports, in_ports, &rmidi);
1420 if (err < 0)
1421 return err;
1422 strcpy(rmidi->name, umidi->chip->card->shortname);
1423 rmidi->info_flags = SNDRV_RAWMIDI_INFO_OUTPUT |
1424 SNDRV_RAWMIDI_INFO_INPUT |
1425 SNDRV_RAWMIDI_INFO_DUPLEX;
1426 rmidi->private_data = umidi;
1427 rmidi->private_free = snd_usbmidi_rawmidi_free;
1428 snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT, &snd_usbmidi_output_ops);
1429 snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_INPUT, &snd_usbmidi_input_ops);
1430
1431 umidi->rmidi = rmidi;
1432 return 0;
1433 }
1434
1435 /*
1436 * Temporarily stop input.
1437 */
1438 void snd_usbmidi_input_stop(struct list_head* p)
1439 {
1440 snd_usb_midi_t* umidi;
1441 int i;
1442
1443 umidi = list_entry(p, snd_usb_midi_t, list);
1444 for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i) {
1445 snd_usb_midi_endpoint_t* ep = &umidi->endpoints[i];
1446 if (ep->in)
1447 usb_kill_urb(ep->in->urb);
1448 }
1449 }
1450
1451 static void snd_usbmidi_input_start_ep(snd_usb_midi_in_endpoint_t* ep)
1452 {
1453 if (ep) {
1454 struct urb* urb = ep->urb;
1455 urb->dev = ep->umidi->chip->dev;
1456 snd_usbmidi_submit_urb(urb, GFP_KERNEL);
1457 }
1458 }
1459
1460 /*
1461 * Resume input after a call to snd_usbmidi_input_stop().
1462 */
1463 void snd_usbmidi_input_start(struct list_head* p)
1464 {
1465 snd_usb_midi_t* umidi;
1466 int i;
1467
1468 umidi = list_entry(p, snd_usb_midi_t, list);
1469 for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i)
1470 snd_usbmidi_input_start_ep(umidi->endpoints[i].in);
1471 }
1472
1473 /*
1474 * Creates and registers everything needed for a MIDI streaming interface.
1475 */
1476 int snd_usb_create_midi_interface(snd_usb_audio_t* chip,
1477 struct usb_interface* iface,
1478 const snd_usb_audio_quirk_t* quirk)
1479 {
1480 snd_usb_midi_t* umidi;
1481 snd_usb_midi_endpoint_info_t endpoints[MIDI_MAX_ENDPOINTS];
1482 int out_ports, in_ports;
1483 int i, err;
1484
1485 umidi = kcalloc(1, sizeof(*umidi), GFP_KERNEL);
1486 if (!umidi)
1487 return -ENOMEM;
1488 umidi->chip = chip;
1489 umidi->iface = iface;
1490 umidi->quirk = quirk;
1491 umidi->usb_protocol_ops = &snd_usbmidi_standard_ops;
1492
1493 /* detect the endpoint(s) to use */
1494 memset(endpoints, 0, sizeof(endpoints));
1495 if (!quirk) {
1496 err = snd_usbmidi_get_ms_info(umidi, endpoints);
1497 } else {
1498 switch (quirk->type) {
1499 case QUIRK_MIDI_FIXED_ENDPOINT:
1500 memcpy(&endpoints[0], quirk->data,
1501 sizeof(snd_usb_midi_endpoint_info_t));
1502 err = snd_usbmidi_detect_endpoints(umidi, &endpoints[0], 1);
1503 break;
1504 case QUIRK_MIDI_YAMAHA:
1505 err = snd_usbmidi_detect_yamaha(umidi, &endpoints[0]);
1506 break;
1507 case QUIRK_MIDI_MIDIMAN:
1508 umidi->usb_protocol_ops = &snd_usbmidi_midiman_ops;
1509 memcpy(&endpoints[0], quirk->data,
1510 sizeof(snd_usb_midi_endpoint_info_t));
1511 err = 0;
1512 break;
1513 case QUIRK_MIDI_NOVATION:
1514 umidi->usb_protocol_ops = &snd_usbmidi_novation_ops;
1515 err = snd_usbmidi_detect_per_port_endpoints(umidi, endpoints);
1516 break;
1517 case QUIRK_MIDI_RAW:
1518 umidi->usb_protocol_ops = &snd_usbmidi_raw_ops;
1519 err = snd_usbmidi_detect_per_port_endpoints(umidi, endpoints);
1520 break;
1521 case QUIRK_MIDI_EMAGIC:
1522 umidi->usb_protocol_ops = &snd_usbmidi_emagic_ops;
1523 memcpy(&endpoints[0], quirk->data,
1524 sizeof(snd_usb_midi_endpoint_info_t));
1525 err = snd_usbmidi_detect_endpoints(umidi, &endpoints[0], 1);
1526 break;
1527 case QUIRK_MIDI_MIDITECH:
1528 err = snd_usbmidi_detect_per_port_endpoints(umidi, endpoints);
1529 break;
1530 default:
1531 snd_printd(KERN_ERR "invalid quirk type %d\n", quirk->type);
1532 err = -ENXIO;
1533 break;
1534 }
1535 }
1536 if (err < 0) {
1537 kfree(umidi);
1538 return err;
1539 }
1540
1541 /* create rawmidi device */
1542 out_ports = 0;
1543 in_ports = 0;
1544 for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i) {
1545 out_ports += snd_usbmidi_count_bits(endpoints[i].out_cables);
1546 in_ports += snd_usbmidi_count_bits(endpoints[i].in_cables);
1547 }
1548 err = snd_usbmidi_create_rawmidi(umidi, out_ports, in_ports);
1549 if (err < 0) {
1550 kfree(umidi);
1551 return err;
1552 }
1553
1554 /* create endpoint/port structures */
1555 if (quirk && quirk->type == QUIRK_MIDI_MIDIMAN)
1556 err = snd_usbmidi_create_endpoints_midiman(umidi, &endpoints[0]);
1557 else
1558 err = snd_usbmidi_create_endpoints(umidi, endpoints);
1559 if (err < 0) {
1560 snd_usbmidi_free(umidi);
1561 return err;
1562 }
1563
1564 list_add(&umidi->list, &umidi->chip->midi_list);
1565
1566 for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i)
1567 snd_usbmidi_input_start_ep(umidi->endpoints[i].in);
1568 return 0;
1569 }
1570
1571 EXPORT_SYMBOL(snd_usb_create_midi_interface);
1572 EXPORT_SYMBOL(snd_usbmidi_input_stop);
1573 EXPORT_SYMBOL(snd_usbmidi_input_start);
1574 EXPORT_SYMBOL(snd_usbmidi_disconnect);
Linux kernel - Deliverables
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