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authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 18:20:36 -0400
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 18:20:36 -0400
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /drivers/usb/class/usb-midi.c
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
Diffstat (limited to 'drivers/usb/class/usb-midi.c')
-rw-r--r--drivers/usb/class/usb-midi.c2154
1 files changed, 2154 insertions, 0 deletions
diff --git a/drivers/usb/class/usb-midi.c b/drivers/usb/class/usb-midi.c
new file mode 100644
index 000000000000..5f8af35e7633
--- /dev/null
+++ b/drivers/usb/class/usb-midi.c
@@ -0,0 +1,2154 @@
1/*
2 usb-midi.c -- USB-MIDI driver
3
4 Copyright (C) 2001
5 NAGANO Daisuke <breeze.nagano@nifty.ne.jp>
6
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2, or (at your option)
10 any later version.
11
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
16
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
20
21 This driver is based on:
22 - 'Universal Serial Bus Device Class Definition for MIDI Device'
23 - linux/drivers/sound/es1371.c, linux/drivers/usb/audio.c
24 - alsa/lowlevel/pci/cs64xx.c
25 - umidi.c for NetBSD
26 */
27
28/* ------------------------------------------------------------------------- */
29
30
31#include <linux/module.h>
32#include <linux/kernel.h>
33#include <linux/sched.h>
34#include <linux/list.h>
35#include <linux/slab.h>
36#include <linux/usb.h>
37#include <linux/poll.h>
38#include <linux/sound.h>
39#include <linux/init.h>
40#include <asm/semaphore.h>
41
42#include "usb-midi.h"
43
44/* ------------------------------------------------------------------------- */
45
46/* More verbose on syslog */
47#undef MIDI_DEBUG
48
49#define MIDI_IN_BUFSIZ 1024
50
51#define HAVE_SUPPORT_USB_MIDI_CLASS
52
53#undef HAVE_SUPPORT_ALSA
54
55/* ------------------------------------------------------------------------- */
56
57static int singlebyte = 0;
58module_param(singlebyte, int, 0);
59MODULE_PARM_DESC(singlebyte,"Enable sending MIDI messages with single message packet");
60
61static int maxdevices = 4;
62module_param(maxdevices, int, 0);
63MODULE_PARM_DESC(maxdevices,"Max number of allocatable MIDI device");
64
65static int uvendor = -1;
66module_param(uvendor, int, 0);
67MODULE_PARM_DESC(uvendor, "The USB Vendor ID of a semi-compliant interface");
68
69static int uproduct = -1;
70module_param(uproduct, int, 0);
71MODULE_PARM_DESC(uproduct, "The USB Product ID of a semi-compliant interface");
72
73static int uinterface = -1;
74module_param(uinterface, int, 0);
75MODULE_PARM_DESC(uinterface, "The Interface number of a semi-compliant interface");
76
77static int ualt = -1;
78module_param(ualt, int, 0);
79MODULE_PARM_DESC(ualt, "The optional alternative setting of a semi-compliant interface");
80
81static int umin = -1;
82module_param(umin, int, 0);
83MODULE_PARM_DESC(umin, "The input endpoint of a semi-compliant interface");
84
85static int umout = -1;
86module_param(umout, int, 0);
87MODULE_PARM_DESC(umout, "The output endpoint of a semi-compliant interface");
88
89static int ucable = -1;
90module_param(ucable, int, 0);
91MODULE_PARM_DESC(ucable, "The cable number used for a semi-compliant interface");
92
93/** Note -- the usb_string() returns only Latin-1 characters.
94 * (unicode chars <= 255). To support Japanese, a unicode16LE-to-EUC or
95 * unicode16LE-to-JIS routine is needed to wrap around usb_get_string().
96 **/
97static unsigned short ulangid = 0x0409; /** 0x0411 for Japanese **/
98module_param(ulangid, ushort, 0);
99MODULE_PARM_DESC(ulangid, "The optional preferred USB Language ID for all devices");
100
101MODULE_AUTHOR("NAGANO Daisuke <breeze.nagano@nifty.ne.jp>");
102MODULE_DESCRIPTION("USB-MIDI driver");
103MODULE_LICENSE("GPL");
104
105/* ------------------------------------------------------------------------- */
106
107/** MIDIStreaming Class-Specific Interface Descriptor Subtypes **/
108
109#define MS_DESCRIPTOR_UNDEFINED 0
110#define MS_HEADER 1
111#define MIDI_IN_JACK 2
112#define MIDI_OUT_JACK 3
113/* Spec reads: ELEMENT */
114#define ELEMENT_DESCRIPTOR 4
115
116#define MS_HEADER_LENGTH 7
117
118/** MIDIStreaming Class-Specific Endpoint Descriptor Subtypes **/
119
120#define DESCRIPTOR_UNDEFINED 0
121/* Spec reads: MS_GENERAL */
122#define MS_GENERAL_ENDPOINT 1
123
124/** MIDIStreaming MIDI IN and OUT Jack Types **/
125
126#define JACK_TYPE_UNDEFINED 0
127/* Spec reads: EMBEDDED */
128#define EMBEDDED_JACK 1
129/* Spec reads: EXTERNAL */
130#define EXTERNAL_JACK 2
131
132
133/* structure summary
134
135 usb_midi_state usb_device
136 | |
137 *| *| per ep
138 in_ep out_ep
139 | |
140 *| *| per cable
141 min mout
142 | | (cable to device pairing magic)
143 | |
144 usb_midi_dev dev_id (major,minor) == file->private_data
145
146*/
147
148/* usb_midi_state: corresponds to a USB-MIDI module */
149struct usb_midi_state {
150 struct list_head mididev;
151
152 struct usb_device *usbdev;
153
154 struct list_head midiDevList;
155 struct list_head inEndpointList;
156 struct list_head outEndpointList;
157
158 spinlock_t lock;
159
160 unsigned int count; /* usage counter */
161};
162
163/* midi_out_endpoint: corresponds to an output endpoint */
164struct midi_out_endpoint {
165 struct list_head list;
166
167 struct usb_device *usbdev;
168 int endpoint;
169 spinlock_t lock;
170 wait_queue_head_t wait;
171
172 unsigned char *buf;
173 int bufWrPtr;
174 int bufSize;
175
176 struct urb *urb;
177};
178
179/* midi_in_endpoint: corresponds to an input endpoint */
180struct midi_in_endpoint {
181 struct list_head list;
182
183 struct usb_device *usbdev;
184 int endpoint;
185 spinlock_t lock;
186 wait_queue_head_t wait;
187
188 struct usb_mididev *cables[16]; // cables open for read
189 int readers; // number of cables open for read
190
191 struct urb *urb;
192 unsigned char *recvBuf;
193 int recvBufSize;
194 int urbSubmitted; //FIXME: == readers > 0
195};
196
197/* usb_mididev: corresponds to a logical device */
198struct usb_mididev {
199 struct list_head list;
200
201 struct usb_midi_state *midi;
202 int dev_midi;
203 mode_t open_mode;
204
205 struct {
206 struct midi_in_endpoint *ep;
207 int cableId;
208
209// as we are pushing data from usb_bulk_read to usb_midi_read,
210// we need a larger, cyclic buffer here.
211 unsigned char buf[MIDI_IN_BUFSIZ];
212 int bufRdPtr;
213 int bufWrPtr;
214 int bufRemains;
215 } min;
216
217 struct {
218 struct midi_out_endpoint *ep;
219 int cableId;
220
221 unsigned char buf[3];
222 int bufPtr;
223 int bufRemains;
224
225 int isInExclusive;
226 unsigned char lastEvent;
227 } mout;
228
229 int singlebyte;
230};
231
232/** Map the high nybble of MIDI voice messages to number of Message bytes.
233 * High nyble ranges from 0x8 to 0xe
234 */
235
236static int remains_80e0[] = {
237 3, /** 0x8X Note Off **/
238 3, /** 0x9X Note On **/
239 3, /** 0xAX Poly-key pressure **/
240 3, /** 0xBX Control Change **/
241 2, /** 0xCX Program Change **/
242 2, /** 0xDX Channel pressure **/
243 3 /** 0xEX PitchBend Change **/
244};
245
246/** Map the messages to a number of Message bytes.
247 *
248 **/
249static int remains_f0f6[] = {
250 0, /** 0xF0 **/
251 2, /** 0XF1 **/
252 3, /** 0XF2 **/
253 2, /** 0XF3 **/
254 2, /** 0XF4 (Undefined by MIDI Spec, and subject to change) **/
255 2, /** 0XF5 (Undefined by MIDI Spec, and subject to change) **/
256 1 /** 0XF6 **/
257};
258
259/** Map the messages to a CIN (Code Index Number).
260 *
261 **/
262static int cin_f0ff[] = {
263 4, /** 0xF0 System Exclusive Message Start (special cases may be 6 or 7) */
264 2, /** 0xF1 **/
265 3, /** 0xF2 **/
266 2, /** 0xF3 **/
267 2, /** 0xF4 **/
268 2, /** 0xF5 **/
269 5, /** 0xF6 **/
270 5, /** 0xF7 End of System Exclusive Message (May be 6 or 7) **/
271 5, /** 0xF8 **/
272 5, /** 0xF9 **/
273 5, /** 0xFA **/
274 5, /** 0xFB **/
275 5, /** 0xFC **/
276 5, /** 0xFD **/
277 5, /** 0xFE **/
278 5 /** 0xFF **/
279};
280
281/** Map MIDIStreaming Event packet Code Index Number (low nybble of byte 0)
282 * to the number of bytes of valid MIDI data.
283 *
284 * CIN of 0 and 1 are NOT USED in MIDIStreaming 1.0.
285 *
286 **/
287static int cin_to_len[] = {
288 0, 0, 2, 3,
289 3, 1, 2, 3,
290 3, 3, 3, 3,
291 2, 2, 3, 1
292};
293
294
295/* ------------------------------------------------------------------------- */
296
297static struct list_head mididevs = LIST_HEAD_INIT(mididevs);
298
299static DECLARE_MUTEX(open_sem);
300static DECLARE_WAIT_QUEUE_HEAD(open_wait);
301
302
303/* ------------------------------------------------------------------------- */
304
305static void usb_write_callback(struct urb *urb, struct pt_regs *regs)
306{
307 struct midi_out_endpoint *ep = (struct midi_out_endpoint *)urb->context;
308
309 if ( waitqueue_active( &ep->wait ) )
310 wake_up_interruptible( &ep->wait );
311}
312
313
314static int usb_write( struct midi_out_endpoint *ep, unsigned char *buf, int len )
315{
316 struct usb_device *d;
317 int pipe;
318 int ret = 0;
319 int status;
320 int maxretry = 50;
321
322 DECLARE_WAITQUEUE(wait,current);
323 init_waitqueue_head(&ep->wait);
324
325 d = ep->usbdev;
326 pipe = usb_sndbulkpipe(d, ep->endpoint);
327 usb_fill_bulk_urb( ep->urb, d, pipe, (unsigned char*)buf, len,
328 usb_write_callback, ep );
329
330 status = usb_submit_urb(ep->urb, GFP_KERNEL);
331
332 if (status) {
333 printk(KERN_ERR "usbmidi: Cannot submit urb (%d)\n",status);
334 ret = -EIO;
335 goto error;
336 }
337
338 add_wait_queue( &ep->wait, &wait );
339 set_current_state( TASK_INTERRUPTIBLE );
340
341 while( ep->urb->status == -EINPROGRESS ) {
342 if ( maxretry-- < 0 ) {
343 printk(KERN_ERR "usbmidi: usb_bulk_msg timed out\n");
344 ret = -ETIME;
345 break;
346 }
347 interruptible_sleep_on_timeout( &ep->wait, 10 );
348 }
349 set_current_state( TASK_RUNNING );
350 remove_wait_queue( &ep->wait, &wait );
351
352error:
353 return ret;
354}
355
356
357/** Copy data from URB to In endpoint buf.
358 * Discard if CIN == 0 or CIN = 1.
359 *
360 *
361 **/
362
363static void usb_bulk_read(struct urb *urb, struct pt_regs *regs)
364{
365 struct midi_in_endpoint *ep = (struct midi_in_endpoint *)(urb->context);
366 unsigned char *data = urb->transfer_buffer;
367 int i, j, wake;
368
369 if ( !ep->urbSubmitted ) {
370 return;
371 }
372
373 if ( (urb->status == 0) && (urb->actual_length > 0) ) {
374 wake = 0;
375 spin_lock( &ep->lock );
376
377 for(j = 0; j < urb->actual_length; j += 4) {
378 int cin = (data[j]>>0)&0xf;
379 int cab = (data[j]>>4)&0xf;
380 struct usb_mididev *cable = ep->cables[cab];
381 if ( cable ) {
382 int len = cin_to_len[cin]; /** length of MIDI data **/
383 for (i = 0; i < len; i++) {
384 cable->min.buf[cable->min.bufWrPtr] = data[1+i+j];
385 cable->min.bufWrPtr = (cable->min.bufWrPtr+1)%MIDI_IN_BUFSIZ;
386 if (cable->min.bufRemains < MIDI_IN_BUFSIZ)
387 cable->min.bufRemains += 1;
388 else /** need to drop data **/
389 cable->min.bufRdPtr += (cable->min.bufRdPtr+1)%MIDI_IN_BUFSIZ;
390 wake = 1;
391 }
392 }
393 }
394
395 spin_unlock ( &ep->lock );
396 if ( wake ) {
397 wake_up( &ep->wait );
398 }
399 }
400
401 /* urb->dev must be reinitialized on 2.4.x kernels */
402 urb->dev = ep->usbdev;
403
404 urb->actual_length = 0;
405 usb_submit_urb(urb, GFP_ATOMIC);
406}
407
408
409
410/* ------------------------------------------------------------------------- */
411
412/* This routine must be called with spin_lock */
413
414/** Wrapper around usb_write().
415 * This routine must be called with spin_lock held on ep.
416 * Called by midiWrite(), putOneMidiEvent(), and usb_midi_write();
417 **/
418static int flush_midi_buffer( struct midi_out_endpoint *ep )
419{
420 int ret=0;
421
422 if ( ep->bufWrPtr > 0 ) {
423 ret = usb_write( ep, ep->buf, ep->bufWrPtr );
424 ep->bufWrPtr = 0;
425 }
426
427 return ret;
428}
429
430
431/* ------------------------------------------------------------------------- */
432
433
434/** Given a MIDI Event, determine size of data to be attached to
435 * USB-MIDI packet.
436 * Returns 1, 2 or 3.
437 * Called by midiWrite();
438 * Uses remains_80e0 and remains_f0f6;
439 **/
440static int get_remains(int event)
441{
442 int ret;
443
444 if ( event < 0x80 ) {
445 ret = 1;
446 } else if ( event < 0xf0 ) {
447 ret = remains_80e0[((event-0x80)>>4)&0x0f];
448 } else if ( event < 0xf7 ) {
449 ret = remains_f0f6[event-0xf0];
450 } else {
451 ret = 1;
452 }
453
454 return ret;
455}
456
457/** Given the output MIDI data in the output buffer, computes a reasonable
458 * CIN.
459 * Called by putOneMidiEvent().
460 **/
461static int get_CIN( struct usb_mididev *m )
462{
463 int cin;
464
465 if ( m->mout.buf[0] == 0xf7 ) {
466 cin = 5;
467 }
468 else if ( m->mout.buf[1] == 0xf7 ) {
469 cin = 6;
470 }
471 else if ( m->mout.buf[2] == 0xf7 ) {
472 cin = 7;
473 }
474 else {
475 if ( m->mout.isInExclusive == 1 ) {
476 cin = 4;
477 } else if ( m->mout.buf[0] < 0x80 ) {
478 /** One byte that we know nothing about. **/
479 cin = 0xF;
480 } else if ( m->mout.buf[0] < 0xf0 ) {
481 /** MIDI Voice messages 0x8X to 0xEX map to cin 0x8 to 0xE. **/
482 cin = (m->mout.buf[0]>>4)&0x0f;
483 }
484 else {
485 /** Special lookup table exists for real-time events. **/
486 cin = cin_f0ff[m->mout.buf[0]-0xf0];
487 }
488 }
489
490 return cin;
491}
492
493
494/* ------------------------------------------------------------------------- */
495
496
497
498/** Move data to USB endpoint buffer.
499 *
500 **/
501static int put_one_midi_event(struct usb_mididev *m)
502{
503 int cin;
504 unsigned long flags;
505 struct midi_out_endpoint *ep = m->mout.ep;
506 int ret=0;
507
508 cin = get_CIN( m );
509 if ( cin > 0x0f || cin < 0 ) {
510 return -EINVAL;
511 }
512
513 spin_lock_irqsave( &ep->lock, flags );
514 ep->buf[ep->bufWrPtr++] = (m->mout.cableId<<4) | cin;
515 ep->buf[ep->bufWrPtr++] = m->mout.buf[0];
516 ep->buf[ep->bufWrPtr++] = m->mout.buf[1];
517 ep->buf[ep->bufWrPtr++] = m->mout.buf[2];
518 if ( ep->bufWrPtr >= ep->bufSize ) {
519 ret = flush_midi_buffer( ep );
520 }
521 spin_unlock_irqrestore( &ep->lock, flags);
522
523 m->mout.buf[0] = m->mout.buf[1] = m->mout.buf[2] = 0;
524 m->mout.bufPtr = 0;
525
526 return ret;
527}
528
529/** Write the MIDI message v on the midi device.
530 * Called by usb_midi_write();
531 * Responsible for packaging a MIDI data stream into USB-MIDI packets.
532 **/
533
534static int midi_write( struct usb_mididev *m, int v )
535{
536 unsigned long flags;
537 struct midi_out_endpoint *ep = m->mout.ep;
538 int ret=0;
539 unsigned char c = (unsigned char)v;
540 unsigned char sysrt_buf[4];
541
542 if ( m->singlebyte != 0 ) {
543 /** Simple code to handle the single-byte USB-MIDI protocol. */
544 spin_lock_irqsave( &ep->lock, flags );
545 if ( ep->bufWrPtr+4 > ep->bufSize ) {
546 ret = flush_midi_buffer( ep );
547 if ( !ret ) {
548 spin_unlock_irqrestore( &ep->lock, flags );
549 return ret;
550 }
551 }
552 ep->buf[ep->bufWrPtr++] = (m->mout.cableId<<4) | 0x0f; /* single byte */
553 ep->buf[ep->bufWrPtr++] = c;
554 ep->buf[ep->bufWrPtr++] = 0;
555 ep->buf[ep->bufWrPtr++] = 0;
556 if ( ep->bufWrPtr >= ep->bufSize ) {
557 ret = flush_midi_buffer( ep );
558 }
559 spin_unlock_irqrestore( &ep->lock, flags );
560
561 return ret;
562 }
563 /** Normal USB-MIDI protocol begins here. */
564
565 if ( c > 0xf7 ) { /* system: Realtime messages */
566 /** Realtime messages are written IMMEDIATELY. */
567 sysrt_buf[0] = (m->mout.cableId<<4) | 0x0f;
568 sysrt_buf[1] = c;
569 sysrt_buf[2] = 0;
570 sysrt_buf[3] = 0;
571 spin_lock_irqsave( &ep->lock, flags );
572 ret = usb_write( ep, sysrt_buf, 4 );
573 spin_unlock_irqrestore( &ep->lock, flags );
574 /* m->mout.lastEvent = 0; */
575
576 return ret;
577 }
578
579 if ( c >= 0x80 ) {
580 if ( c < 0xf0 ) {
581 m->mout.lastEvent = c;
582 m->mout.isInExclusive = 0;
583 m->mout.bufRemains = get_remains(c);
584 } else if ( c == 0xf0 ) {
585 /* m->mout.lastEvent = 0; */
586 m->mout.isInExclusive = 1;
587 m->mout.bufRemains = get_remains(c);
588 } else if ( c == 0xf7 && m->mout.isInExclusive == 1 ) {
589 /* m->mout.lastEvent = 0; */
590 m->mout.isInExclusive = 0;
591 m->mout.bufRemains = 1;
592 } else if ( c > 0xf0 ) {
593 /* m->mout.lastEvent = 0; */
594 m->mout.isInExclusive = 0;
595 m->mout.bufRemains = get_remains(c);
596 }
597
598 } else if ( m->mout.bufRemains == 0 && m->mout.isInExclusive == 0 ) {
599 if ( m->mout.lastEvent == 0 ) {
600 return 0; /* discard, waiting for the first event */
601 }
602 /** track status **/
603 m->mout.buf[0] = m->mout.lastEvent;
604 m->mout.bufPtr = 1;
605 m->mout.bufRemains = get_remains(m->mout.lastEvent)-1;
606 }
607
608 m->mout.buf[m->mout.bufPtr++] = c;
609 m->mout.bufRemains--;
610 if ( m->mout.bufRemains == 0 || m->mout.bufPtr >= 3) {
611 ret = put_one_midi_event(m);
612 }
613
614 return ret;
615}
616
617
618/* ------------------------------------------------------------------------- */
619
620/** Basic operation on /dev/midiXX as registered through struct file_operations.
621 *
622 * Basic contract: Used to change the current read/write position in a file.
623 * On success, the non-negative position is reported.
624 * On failure, the negative of an error code is reported.
625 *
626 * Because a MIDIStream is not a file, all seek operations are doomed to fail.
627 *
628 **/
629static loff_t usb_midi_llseek(struct file *file, loff_t offset, int origin)
630{
631 /** Tell user you cannot seek on a PIPE-like device. **/
632 return -ESPIPE;
633}
634
635
636/** Basic operation on /dev/midiXX as registered through struct file_operations.
637 *
638 * Basic contract: Block until count bytes have been read or an error occurs.
639 *
640 **/
641
642static ssize_t usb_midi_read(struct file *file, char __user *buffer, size_t count, loff_t *ppos)
643{
644 struct usb_mididev *m = (struct usb_mididev *)file->private_data;
645 struct midi_in_endpoint *ep = m->min.ep;
646 ssize_t ret;
647 DECLARE_WAITQUEUE(wait, current);
648
649 if ( !access_ok(VERIFY_READ, buffer, count) ) {
650 return -EFAULT;
651 }
652 if ( count == 0 ) {
653 return 0;
654 }
655
656 add_wait_queue( &ep->wait, &wait );
657 ret = 0;
658 while( count > 0 ) {
659 int cnt;
660 int d = (int)count;
661
662 cnt = m->min.bufRemains;
663 if ( cnt > d ) {
664 cnt = d;
665 }
666
667 if ( cnt <= 0 ) {
668 if ( file->f_flags & O_NONBLOCK ) {
669 if (!ret)
670 ret = -EAGAIN;
671 break;
672 }
673 __set_current_state(TASK_INTERRUPTIBLE);
674 schedule();
675 if (signal_pending(current)) {
676 if(!ret)
677 ret=-ERESTARTSYS;
678 break;
679 }
680 continue;
681 }
682
683 {
684 int i;
685 unsigned long flags; /* used to synchronize access to the endpoint */
686 spin_lock_irqsave( &ep->lock, flags );
687 for (i = 0; i < cnt; i++) {
688 if ( copy_to_user( buffer+i, m->min.buf+m->min.bufRdPtr, 1 ) ) {
689 if ( !ret )
690 ret = -EFAULT;
691 break;
692 }
693 m->min.bufRdPtr = (m->min.bufRdPtr+1)%MIDI_IN_BUFSIZ;
694 m->min.bufRemains -= 1;
695 }
696 spin_unlock_irqrestore( &ep->lock, flags );
697 }
698
699 count-=cnt;
700 buffer+=cnt;
701 ret+=cnt;
702
703 break;
704 }
705
706 remove_wait_queue( &ep->wait, &wait );
707 set_current_state(TASK_RUNNING);
708
709 return ret;
710}
711
712
713/** Basic operation on /dev/midiXX as registered through struct file_operations.
714 *
715 * Basic Contract: Take MIDI data byte-by-byte and pass it to
716 * writeMidi() which packages MIDI data into USB-MIDI stream.
717 * Then flushMidiData() is called to ensure all bytes have been written
718 * in a timely fashion.
719 *
720 **/
721
722static ssize_t usb_midi_write(struct file *file, const char __user *buffer, size_t count, loff_t *ppos)
723{
724 struct usb_mididev *m = (struct usb_mididev *)file->private_data;
725 ssize_t ret;
726 unsigned long int flags;
727
728 if ( !access_ok(VERIFY_READ, buffer, count) ) {
729 return -EFAULT;
730 }
731 if ( count == 0 ) {
732 return 0;
733 }
734
735 ret = 0;
736 while( count > 0 ) {
737 unsigned char c;
738
739 if (copy_from_user((unsigned char *)&c, buffer, 1)) {
740 if ( ret == 0 )
741 ret = -EFAULT;
742 break;
743 }
744 if( midi_write(m, (int)c) ) {
745 if ( ret == 0 )
746 ret = -EFAULT;
747 break;
748 }
749 count--;
750 buffer++;
751 ret++;
752 }
753
754 spin_lock_irqsave( &m->mout.ep->lock, flags );
755 if ( flush_midi_buffer(m->mout.ep) < 0 ) {
756 ret = -EFAULT;
757 }
758 spin_unlock_irqrestore( &m->mout.ep->lock, flags );
759
760 return ret;
761}
762
763/** Basic operation on /dev/midiXX as registered through struct file_operations.
764 *
765 * Basic contract: Wait (spin) until ready to read or write on the file.
766 *
767 **/
768static unsigned int usb_midi_poll(struct file *file, struct poll_table_struct *wait)
769{
770 struct usb_mididev *m = (struct usb_mididev *)file->private_data;
771 struct midi_in_endpoint *iep = m->min.ep;
772 struct midi_out_endpoint *oep = m->mout.ep;
773 unsigned long flags;
774 unsigned int mask = 0;
775
776 if ( file->f_mode & FMODE_READ ) {
777 poll_wait( file, &iep->wait, wait );
778 spin_lock_irqsave( &iep->lock, flags );
779 if ( m->min.bufRemains > 0 )
780 mask |= POLLIN | POLLRDNORM;
781 spin_unlock_irqrestore( &iep->lock, flags );
782 }
783
784 if ( file->f_mode & FMODE_WRITE ) {
785 poll_wait( file, &oep->wait, wait );
786 spin_lock_irqsave( &oep->lock, flags );
787 if ( oep->bufWrPtr < oep->bufSize )
788 mask |= POLLOUT | POLLWRNORM;
789 spin_unlock_irqrestore( &oep->lock, flags );
790 }
791
792 return mask;
793}
794
795
796/** Basic operation on /dev/midiXX as registered through struct file_operations.
797 *
798 * Basic contract: This is always the first operation performed on the
799 * device node. If no method is defined, the open succeeds without any
800 * notification given to the module.
801 *
802 **/
803
804static int usb_midi_open(struct inode *inode, struct file *file)
805{
806 int minor = iminor(inode);
807 DECLARE_WAITQUEUE(wait, current);
808 struct usb_midi_state *s;
809 struct usb_mididev *m;
810 unsigned long flags;
811 int succeed = 0;
812
813#if 0
814 printk(KERN_INFO "usb-midi: Open minor= %d.\n", minor);
815#endif
816
817 for(;;) {
818 down(&open_sem);
819 list_for_each_entry(s, &mididevs, mididev) {
820 list_for_each_entry(m, &s->midiDevList, list) {
821 if ( !((m->dev_midi ^ minor) & ~0xf) )
822 goto device_found;
823 }
824 }
825 up(&open_sem);
826 return -ENODEV;
827
828 device_found:
829 if ( !s->usbdev ) {
830 up(&open_sem);
831 return -EIO;
832 }
833 if ( !(m->open_mode & file->f_mode) ) {
834 break;
835 }
836 if ( file->f_flags & O_NONBLOCK ) {
837 up(&open_sem);
838 return -EBUSY;
839 }
840 __set_current_state(TASK_INTERRUPTIBLE);
841 add_wait_queue( &open_wait, &wait );
842 up(&open_sem);
843 schedule();
844 remove_wait_queue( &open_wait, &wait );
845 if ( signal_pending(current) ) {
846 return -ERESTARTSYS;
847 }
848 }
849
850 file->private_data = m;
851 spin_lock_irqsave( &s->lock, flags );
852
853 if ( !(m->open_mode & (FMODE_READ | FMODE_WRITE)) ) {
854 //FIXME: intented semantics unclear here
855 m->min.bufRdPtr = 0;
856 m->min.bufWrPtr = 0;
857 m->min.bufRemains = 0;
858 spin_lock_init(&m->min.ep->lock);
859
860 m->mout.bufPtr = 0;
861 m->mout.bufRemains = 0;
862 m->mout.isInExclusive = 0;
863 m->mout.lastEvent = 0;
864 spin_lock_init(&m->mout.ep->lock);
865 }
866
867 if ( (file->f_mode & FMODE_READ) && m->min.ep != NULL ) {
868 unsigned long int flagsep;
869 spin_lock_irqsave( &m->min.ep->lock, flagsep );
870 m->min.ep->cables[m->min.cableId] = m;
871 m->min.ep->readers += 1;
872 m->min.bufRdPtr = 0;
873 m->min.bufWrPtr = 0;
874 m->min.bufRemains = 0;
875 spin_unlock_irqrestore( &m->min.ep->lock, flagsep );
876
877 if ( !(m->min.ep->urbSubmitted)) {
878
879 /* urb->dev must be reinitialized on 2.4.x kernels */
880 m->min.ep->urb->dev = m->min.ep->usbdev;
881
882 if ( usb_submit_urb(m->min.ep->urb, GFP_ATOMIC) ) {
883 printk(KERN_ERR "usbmidi: Cannot submit urb for MIDI-IN\n");
884 }
885 m->min.ep->urbSubmitted = 1;
886 }
887 m->open_mode |= FMODE_READ;
888 succeed = 1;
889 }
890
891 if ( (file->f_mode & FMODE_WRITE) && m->mout.ep != NULL ) {
892 m->mout.bufPtr = 0;
893 m->mout.bufRemains = 0;
894 m->mout.isInExclusive = 0;
895 m->mout.lastEvent = 0;
896 m->open_mode |= FMODE_WRITE;
897 succeed = 1;
898 }
899
900 spin_unlock_irqrestore( &s->lock, flags );
901
902 s->count++;
903 up(&open_sem);
904
905 /** Changed to prevent extra increments to USE_COUNT. **/
906 if (!succeed) {
907 return -EBUSY;
908 }
909
910#if 0
911 printk(KERN_INFO "usb-midi: Open Succeeded. minor= %d.\n", minor);
912#endif
913
914 return nonseekable_open(inode, file); /** Success. **/
915}
916
917
918/** Basic operation on /dev/midiXX as registered through struct file_operations.
919 *
920 * Basic contract: Close an opened file and deallocate anything we allocated.
921 * Like open(), this can be missing. If open set file->private_data,
922 * release() must clear it.
923 *
924 **/
925
926static int usb_midi_release(struct inode *inode, struct file *file)
927{
928 struct usb_mididev *m = (struct usb_mididev *)file->private_data;
929 struct usb_midi_state *s = (struct usb_midi_state *)m->midi;
930
931#if 0
932 printk(KERN_INFO "usb-midi: Close.\n");
933#endif
934
935 down(&open_sem);
936
937 if ( m->open_mode & FMODE_WRITE ) {
938 m->open_mode &= ~FMODE_WRITE;
939 usb_kill_urb( m->mout.ep->urb );
940 }
941
942 if ( m->open_mode & FMODE_READ ) {
943 unsigned long int flagsep;
944 spin_lock_irqsave( &m->min.ep->lock, flagsep );
945 m->min.ep->cables[m->min.cableId] = NULL; // discard cable
946 m->min.ep->readers -= 1;
947 m->open_mode &= ~FMODE_READ;
948 if ( m->min.ep->readers == 0 &&
949 m->min.ep->urbSubmitted ) {
950 m->min.ep->urbSubmitted = 0;
951 usb_kill_urb(m->min.ep->urb);
952 }
953 spin_unlock_irqrestore( &m->min.ep->lock, flagsep );
954 }
955
956 s->count--;
957
958 up(&open_sem);
959 wake_up(&open_wait);
960
961 file->private_data = NULL;
962 return 0;
963}
964
965static struct file_operations usb_midi_fops = {
966 .owner = THIS_MODULE,
967 .llseek = usb_midi_llseek,
968 .read = usb_midi_read,
969 .write = usb_midi_write,
970 .poll = usb_midi_poll,
971 .open = usb_midi_open,
972 .release = usb_midi_release,
973};
974
975/* ------------------------------------------------------------------------- */
976
977/** Returns filled midi_in_endpoint structure or null on failure.
978 *
979 * Parameters:
980 * d - a usb_device
981 * endPoint - An usb endpoint in the range 0 to 15.
982 * Called by allocUsbMidiDev();
983 *
984 **/
985
986static struct midi_in_endpoint *alloc_midi_in_endpoint( struct usb_device *d, int endPoint )
987{
988 struct midi_in_endpoint *ep;
989 int bufSize;
990 int pipe;
991
992 endPoint &= 0x0f; /* Silently force endPoint to lie in range 0 to 15. */
993
994 pipe = usb_rcvbulkpipe( d, endPoint );
995 bufSize = usb_maxpacket( d, pipe, 0 );
996 /* usb_pipein() = ! usb_pipeout() = true for an in Endpoint */
997
998 ep = (struct midi_in_endpoint *)kmalloc(sizeof(struct midi_in_endpoint), GFP_KERNEL);
999 if ( !ep ) {
1000 printk(KERN_ERR "usbmidi: no memory for midi in-endpoint\n");
1001 return NULL;
1002 }
1003 memset( ep, 0, sizeof(struct midi_in_endpoint) );
1004// this sets cables[] and readers to 0, too.
1005// for (i=0; i<16; i++) ep->cables[i] = 0; // discard cable
1006// ep->readers = 0;
1007
1008 ep->endpoint = endPoint;
1009
1010 ep->recvBuf = (unsigned char *)kmalloc(sizeof(unsigned char)*(bufSize), GFP_KERNEL);
1011 if ( !ep->recvBuf ) {
1012 printk(KERN_ERR "usbmidi: no memory for midi in-endpoint buffer\n");
1013 kfree(ep);
1014 return NULL;
1015 }
1016
1017 ep->urb = usb_alloc_urb(0, GFP_KERNEL); /* no ISO */
1018 if ( !ep->urb ) {
1019 printk(KERN_ERR "usbmidi: no memory for midi in-endpoint urb\n");
1020 kfree(ep->recvBuf);
1021 kfree(ep);
1022 return NULL;
1023 }
1024 usb_fill_bulk_urb( ep->urb, d,
1025 usb_rcvbulkpipe(d, endPoint),
1026 (unsigned char *)ep->recvBuf, bufSize,
1027 usb_bulk_read, ep );
1028
1029 /* ep->bufRdPtr = 0; */
1030 /* ep->bufWrPtr = 0; */
1031 /* ep->bufRemains = 0; */
1032 /* ep->urbSubmitted = 0; */
1033 ep->recvBufSize = bufSize;
1034
1035 init_waitqueue_head(&ep->wait);
1036
1037 return ep;
1038}
1039
1040static int remove_midi_in_endpoint( struct midi_in_endpoint *min )
1041{
1042 usb_kill_urb( min->urb );
1043 usb_free_urb( min->urb );
1044 kfree( min->recvBuf );
1045 kfree( min );
1046
1047 return 0;
1048}
1049
1050/** Returns filled midi_out_endpoint structure or null on failure.
1051 *
1052 * Parameters:
1053 * d - a usb_device
1054 * endPoint - An usb endpoint in the range 0 to 15.
1055 * Called by allocUsbMidiDev();
1056 *
1057 **/
1058static struct midi_out_endpoint *alloc_midi_out_endpoint( struct usb_device *d, int endPoint )
1059{
1060 struct midi_out_endpoint *ep = NULL;
1061 int pipe;
1062 int bufSize;
1063
1064 endPoint &= 0x0f;
1065 pipe = usb_sndbulkpipe( d, endPoint );
1066 bufSize = usb_maxpacket( d, pipe, 1 );
1067
1068 ep = (struct midi_out_endpoint *)kmalloc(sizeof(struct midi_out_endpoint), GFP_KERNEL);
1069 if ( !ep ) {
1070 printk(KERN_ERR "usbmidi: no memory for midi out-endpoint\n");
1071 return NULL;
1072 }
1073 memset( ep, 0, sizeof(struct midi_out_endpoint) );
1074
1075 ep->endpoint = endPoint;
1076 ep->buf = (unsigned char *)kmalloc(sizeof(unsigned char)*bufSize, GFP_KERNEL);
1077 if ( !ep->buf ) {
1078 printk(KERN_ERR "usbmidi: no memory for midi out-endpoint buffer\n");
1079 kfree(ep);
1080 return NULL;
1081 }
1082
1083 ep->urb = usb_alloc_urb(0, GFP_KERNEL); /* no ISO */
1084 if ( !ep->urb ) {
1085 printk(KERN_ERR "usbmidi: no memory for midi out-endpoint urb\n");
1086 kfree(ep->buf);
1087 kfree(ep);
1088 return NULL;
1089 }
1090
1091 ep->bufSize = bufSize;
1092 /* ep->bufWrPtr = 0; */
1093
1094 init_waitqueue_head(&ep->wait);
1095
1096 return ep;
1097}
1098
1099
1100static int remove_midi_out_endpoint( struct midi_out_endpoint *mout )
1101{
1102 usb_kill_urb( mout->urb );
1103 usb_free_urb( mout->urb );
1104 kfree( mout->buf );
1105 kfree( mout );
1106
1107 return 0;
1108}
1109
1110
1111/** Returns a filled usb_mididev structure, registered as a Linux MIDI device.
1112 *
1113 * Returns null if memory is not available or the device cannot be registered.
1114 * Called by allocUsbMidiDev();
1115 *
1116 **/
1117static struct usb_mididev *allocMidiDev(
1118 struct usb_midi_state *s,
1119 struct midi_in_endpoint *min,
1120 struct midi_out_endpoint *mout,
1121 int inCableId,
1122 int outCableId )
1123{
1124 struct usb_mididev *m;
1125
1126 m = (struct usb_mididev *)kmalloc(sizeof(struct usb_mididev), GFP_KERNEL);
1127 if (!m) {
1128 printk(KERN_ERR "usbmidi: no memory for midi device\n");
1129 return NULL;
1130 }
1131
1132 memset(m, 0, sizeof(struct usb_mididev));
1133
1134 if ((m->dev_midi = register_sound_midi(&usb_midi_fops, -1)) < 0) {
1135 printk(KERN_ERR "usbmidi: cannot register midi device\n");
1136 kfree(m);
1137 return NULL;
1138 }
1139
1140 m->midi = s;
1141 /* m->open_mode = 0; */
1142
1143 if ( min ) {
1144 m->min.ep = min;
1145 m->min.ep->usbdev = s->usbdev;
1146 m->min.cableId = inCableId;
1147 }
1148 /* m->min.bufPtr = 0; */
1149 /* m->min.bufRemains = 0; */
1150
1151 if ( mout ) {
1152 m->mout.ep = mout;
1153 m->mout.ep->usbdev = s->usbdev;
1154 m->mout.cableId = outCableId;
1155 }
1156 /* m->mout.bufPtr = 0; */
1157 /* m->mout.bufRemains = 0; */
1158 /* m->mout.isInExclusive = 0; */
1159 /* m->mout.lastEvent = 0; */
1160
1161 m->singlebyte = singlebyte;
1162
1163 return m;
1164}
1165
1166
1167static void release_midi_device( struct usb_midi_state *s )
1168{
1169 struct usb_mididev *m;
1170 struct midi_in_endpoint *min;
1171 struct midi_out_endpoint *mout;
1172
1173 if ( s->count > 0 ) {
1174 up(&open_sem);
1175 return;
1176 }
1177 up( &open_sem );
1178 wake_up( &open_wait );
1179
1180 while(!list_empty(&s->inEndpointList)) {
1181 min = list_entry(s->inEndpointList.next, struct midi_in_endpoint, list);
1182 list_del(&min->list);
1183 remove_midi_in_endpoint(min);
1184 }
1185
1186 while(!list_empty(&s->outEndpointList)) {
1187 mout = list_entry(s->outEndpointList.next, struct midi_out_endpoint, list);
1188 list_del(&mout->list);
1189 remove_midi_out_endpoint(mout);
1190 }
1191
1192 while(!list_empty(&s->midiDevList)) {
1193 m = list_entry(s->midiDevList.next, struct usb_mididev, list);
1194 list_del(&m->list);
1195 kfree(m);
1196 }
1197
1198 kfree(s);
1199
1200 return;
1201}
1202
1203
1204/* ------------------------------------------------------------------------- */
1205
1206/** Utility routine to find a descriptor in a dump of many descriptors.
1207 * Returns start of descriptor or NULL if not found.
1208 * descStart pointer to list of interfaces.
1209 * descLength length (in bytes) of dump
1210 * after (ignored if NULL) this routine returns only descriptors after "after"
1211 * dtype (mandatory) The descriptor type.
1212 * iface (ignored if -1) returns descriptor at/following given interface
1213 * altSetting (ignored if -1) returns descriptor at/following given altSetting
1214 *
1215 *
1216 * Called by parseDescriptor(), find_csinterface_descriptor();
1217 *
1218 */
1219static void *find_descriptor( void *descStart, unsigned int descLength, void *after, unsigned char dtype, int iface, int altSetting )
1220{
1221 unsigned char *p, *end, *next;
1222 int interfaceNumber = -1, altSet = -1;
1223
1224 p = descStart;
1225 end = p + descLength;
1226 for( ; p < end; ) {
1227 if ( p[0] < 2 )
1228 return NULL;
1229 next = p + p[0];
1230 if ( next > end )
1231 return NULL;
1232 if ( p[1] == USB_DT_INTERFACE ) {
1233 if ( p[0] < USB_DT_INTERFACE_SIZE )
1234 return NULL;
1235 interfaceNumber = p[2];
1236 altSet = p[3];
1237 }
1238 if ( p[1] == dtype &&
1239 ( !after || ( p > (unsigned char *)after) ) &&
1240 ( ( iface == -1) || (iface == interfaceNumber) ) &&
1241 ( (altSetting == -1) || (altSetting == altSet) )) {
1242 return p;
1243 }
1244 p = next;
1245 }
1246 return NULL;
1247}
1248
1249/** Utility to find a class-specific interface descriptor.
1250 * dsubtype is a descriptor subtype
1251 * Called by parseDescriptor();
1252 **/
1253static void *find_csinterface_descriptor(void *descStart, unsigned int descLength, void *after, u8 dsubtype, int iface, int altSetting)
1254{
1255 unsigned char *p;
1256
1257 p = find_descriptor( descStart, descLength, after, USB_DT_CS_INTERFACE, iface, altSetting );
1258 while ( p ) {
1259 if ( p[0] >= 3 && p[2] == dsubtype )
1260 return p;
1261 p = find_descriptor( descStart, descLength, p, USB_DT_CS_INTERFACE,
1262 iface, altSetting );
1263 }
1264 return NULL;
1265}
1266
1267
1268/** The magic of making a new usb_midi_device from config happens here.
1269 *
1270 * The caller is responsible for free-ing this return value (if not NULL).
1271 *
1272 **/
1273static struct usb_midi_device *parse_descriptor( struct usb_device *d, unsigned char *buffer, int bufSize, unsigned int ifnum , unsigned int altSetting, int quirks)
1274{
1275 struct usb_midi_device *u;
1276 unsigned char *p1;
1277 unsigned char *p2;
1278 unsigned char *next;
1279 int iep, oep;
1280 int length;
1281 unsigned long longBits;
1282 int pins, nbytes, offset, shift, jack;
1283#ifdef HAVE_JACK_STRINGS
1284 /** Jacks can have associated names. **/
1285 unsigned char jack2string[256];
1286#endif
1287
1288 u = NULL;
1289 /* find audiocontrol interface */
1290 p1 = find_csinterface_descriptor( buffer, bufSize, NULL,
1291 MS_HEADER, ifnum, altSetting);
1292
1293 if ( !p1 ) {
1294 goto error_end;
1295 }
1296
1297 if ( p1[0] < MS_HEADER_LENGTH ) {
1298 goto error_end;
1299 }
1300
1301 /* Assume success. Since the device corresponds to USB-MIDI spec, we assume
1302 that the rest of the USB 2.0 spec is obeyed. */
1303
1304 u = (struct usb_midi_device *)kmalloc( sizeof(struct usb_midi_device), GFP_KERNEL );
1305 if ( !u ) {
1306 return NULL;
1307 }
1308 u->deviceName = NULL;
1309 u->idVendor = le16_to_cpu(d->descriptor.idVendor);
1310 u->idProduct = le16_to_cpu(d->descriptor.idProduct);
1311 u->interface = ifnum;
1312 u->altSetting = altSetting;
1313 u->in[0].endpoint = -1;
1314 u->in[0].cableId = -1;
1315 u->out[0].endpoint = -1;
1316 u->out[0].cableId = -1;
1317
1318
1319 printk(KERN_INFO "usb-midi: Found MIDIStreaming device corresponding to Release %d.%02d of spec.\n",
1320 (p1[4] >> 4) * 10 + (p1[4] & 0x0f ),
1321 (p1[3] >> 4) * 10 + (p1[3] & 0x0f )
1322 );
1323
1324 length = p1[5] | (p1[6] << 8);
1325
1326#ifdef HAVE_JACK_STRINGS
1327 memset(jack2string, 0, sizeof(unsigned char) * 256);
1328#endif
1329
1330 length -= p1[0];
1331 for (p2 = p1 + p1[0]; length > 0; p2 = next) {
1332 next = p2 + p2[0];
1333 length -= p2[0];
1334
1335 if (p2[0] < 2 )
1336 break;
1337 if (p2[1] != USB_DT_CS_INTERFACE)
1338 break;
1339 if (p2[2] == MIDI_IN_JACK && p2[0] >= 6 ) {
1340 jack = p2[4];
1341#ifdef HAVE_JACK_STRINGS
1342 jack2string[jack] = p2[5];
1343#endif
1344 printk(KERN_INFO "usb-midi: Found IN Jack 0x%02x %s\n",
1345 jack, (p2[3] == EMBEDDED_JACK)?"EMBEDDED":"EXTERNAL" );
1346 } else if ( p2[2] == MIDI_OUT_JACK && p2[0] >= 6) {
1347 pins = p2[5];
1348 if ( p2[0] < (6 + 2 * pins) )
1349 continue;
1350 jack = p2[4];
1351#ifdef HAVE_JACK_STRINGS
1352 jack2string[jack] = p2[5 + 2 * pins];
1353#endif
1354 printk(KERN_INFO "usb-midi: Found OUT Jack 0x%02x %s, %d pins\n",
1355 jack, (p2[3] == EMBEDDED_JACK)?"EMBEDDED":"EXTERNAL", pins );
1356 } else if ( p2[2] == ELEMENT_DESCRIPTOR && p2[0] >= 10) {
1357 pins = p2[4];
1358 if ( p2[0] < (9 + 2 * pins ) )
1359 continue;
1360 nbytes = p2[8 + 2 * pins ];
1361 if ( p2[0] < (10 + 2 * pins + nbytes) )
1362 continue;
1363 longBits = 0L;
1364 for ( offset = 0, shift = 0; offset < nbytes && offset < 8; offset ++, shift += 8) {
1365 longBits |= ((long)(p2[9 + 2 * pins + offset])) << shift;
1366 }
1367 jack = p2[3];
1368#ifdef HAVE_JACK_STRINGS
1369 jack2string[jack] = p2[9 + 2 * pins + nbytes];
1370#endif
1371 printk(KERN_INFO "usb-midi: Found ELEMENT 0x%02x, %d/%d pins in/out, bits: 0x%016lx\n",
1372 jack, pins, (int)(p2[5 + 2 * pins]), (long)longBits );
1373 } else {
1374 }
1375 }
1376
1377 iep=0;
1378 oep=0;
1379
1380 if (quirks==0) {
1381 /* MIDISTREAM */
1382 p2 = NULL;
1383 for (p1 = find_descriptor(buffer, bufSize, NULL, USB_DT_ENDPOINT,
1384 ifnum, altSetting ); p1; p1 = next ) {
1385 next = find_descriptor(buffer, bufSize, p1, USB_DT_ENDPOINT,
1386 ifnum, altSetting );
1387 p2 = find_descriptor(buffer, bufSize, p1, USB_DT_CS_ENDPOINT,
1388 ifnum, altSetting );
1389
1390 if ( p2 && next && ( p2 > next ) )
1391 p2 = NULL;
1392
1393 if ( p1[0] < 9 || !p2 || p2[0] < 4 )
1394 continue;
1395
1396 if ( (p1[2] & 0x80) == 0x80 ) {
1397 if ( iep < 15 ) {
1398 pins = p2[3]; /* not pins -- actually "cables" */
1399 if ( pins > 16 )
1400 pins = 16;
1401 u->in[iep].endpoint = p1[2];
1402 u->in[iep].cableId = ( 1 << pins ) - 1;
1403 if ( u->in[iep].cableId )
1404 iep ++;
1405 if ( iep < 15 ) {
1406 u->in[iep].endpoint = -1;
1407 u->in[iep].cableId = -1;
1408 }
1409 }
1410 } else {
1411 if ( oep < 15 ) {
1412 pins = p2[3]; /* not pins -- actually "cables" */
1413 if ( pins > 16 )
1414 pins = 16;
1415 u->out[oep].endpoint = p1[2];
1416 u->out[oep].cableId = ( 1 << pins ) - 1;
1417 if ( u->out[oep].cableId )
1418 oep ++;
1419 if ( oep < 15 ) {
1420 u->out[oep].endpoint = -1;
1421 u->out[oep].cableId = -1;
1422 }
1423 }
1424 }
1425
1426 }
1427 } else if (quirks==1) {
1428 /* YAMAHA quirks */
1429 for (p1 = find_descriptor(buffer, bufSize, NULL, USB_DT_ENDPOINT,
1430 ifnum, altSetting ); p1; p1 = next ) {
1431 next = find_descriptor(buffer, bufSize, p1, USB_DT_ENDPOINT,
1432 ifnum, altSetting );
1433
1434 if ( p1[0] < 7 )
1435 continue;
1436
1437 if ( (p1[2] & 0x80) == 0x80 ) {
1438 if ( iep < 15 ) {
1439 pins = iep+1;
1440 if ( pins > 16 )
1441 pins = 16;
1442 u->in[iep].endpoint = p1[2];
1443 u->in[iep].cableId = ( 1 << pins ) - 1;
1444 if ( u->in[iep].cableId )
1445 iep ++;
1446 if ( iep < 15 ) {
1447 u->in[iep].endpoint = -1;
1448 u->in[iep].cableId = -1;
1449 }
1450 }
1451 } else {
1452 if ( oep < 15 ) {
1453 pins = oep+1;
1454 u->out[oep].endpoint = p1[2];
1455 u->out[oep].cableId = ( 1 << pins ) - 1;
1456 if ( u->out[oep].cableId )
1457 oep ++;
1458 if ( oep < 15 ) {
1459 u->out[oep].endpoint = -1;
1460 u->out[oep].cableId = -1;
1461 }
1462 }
1463 }
1464
1465 }
1466 }
1467
1468 if ( !iep && ! oep ) {
1469 goto error_end;
1470 }
1471
1472 return u;
1473
1474error_end:
1475 kfree(u);
1476 return NULL;
1477}
1478
1479/* ------------------------------------------------------------------------- */
1480
1481/** Returns number between 0 and 16.
1482 *
1483 **/
1484static int on_bits( unsigned short v )
1485{
1486 int i;
1487 int ret=0;
1488
1489 for ( i=0 ; i<16 ; i++ ) {
1490 if ( v & (1<<i) )
1491 ret++;
1492 }
1493
1494 return ret;
1495}
1496
1497
1498/** USB-device will be interrogated for altSetting.
1499 *
1500 * Returns negative on error.
1501 * Called by allocUsbMidiDev();
1502 *
1503 **/
1504
1505static int get_alt_setting( struct usb_device *d, int ifnum )
1506{
1507 int alts, alt=0;
1508 struct usb_interface *iface;
1509 struct usb_host_interface *interface;
1510 struct usb_endpoint_descriptor *ep;
1511 int epin, epout;
1512 int i;
1513
1514 iface = usb_ifnum_to_if( d, ifnum );
1515 alts = iface->num_altsetting;
1516
1517 for ( alt=0 ; alt<alts ; alt++ ) {
1518 interface = &iface->altsetting[alt];
1519 epin = -1;
1520 epout = -1;
1521
1522 for ( i=0 ; i<interface->desc.bNumEndpoints ; i++ ) {
1523 ep = &interface->endpoint[i].desc;
1524 if ( (ep->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) != USB_ENDPOINT_XFER_BULK ) {
1525 continue;
1526 }
1527 if ( (ep->bEndpointAddress & USB_DIR_IN) && epin < 0 ) {
1528 epin = i;
1529 } else if ( epout < 0 ) {
1530 epout = i;
1531 }
1532 if ( epin >= 0 && epout >= 0 ) {
1533 return interface->desc.bAlternateSetting;
1534 }
1535 }
1536 }
1537
1538 return -ENODEV;
1539}
1540
1541
1542/* ------------------------------------------------------------------------- */
1543
1544
1545/** Returns 0 if successful in allocating and registering internal structures.
1546 * Returns negative on failure.
1547 * Calls allocMidiDev which additionally registers /dev/midiXX devices.
1548 * Writes messages on success to indicate which /dev/midiXX is which physical
1549 * endpoint.
1550 *
1551 **/
1552static int alloc_usb_midi_device( struct usb_device *d, struct usb_midi_state *s, struct usb_midi_device *u )
1553{
1554 struct usb_mididev **mdevs=NULL;
1555 struct midi_in_endpoint *mins[15], *min;
1556 struct midi_out_endpoint *mouts[15], *mout;
1557 int inDevs=0, outDevs=0;
1558 int inEndpoints=0, outEndpoints=0;
1559 int inEndpoint, outEndpoint;
1560 int inCableId, outCableId;
1561 int i;
1562 int devices = 0;
1563 int alt = 0;
1564
1565 /* Obtain altSetting or die.. */
1566 alt = u->altSetting;
1567 if ( alt < 0 ) {
1568 alt = get_alt_setting( d, u->interface );
1569 }
1570 if ( alt < 0 )
1571 return -ENXIO;
1572
1573 /* Configure interface */
1574 if ( usb_set_interface( d, u->interface, alt ) < 0 ) {
1575 return -ENXIO;
1576 }
1577
1578 for ( i = 0 ; i < 15 ; i++ ) {
1579 mins[i] = NULL;
1580 mouts[i] = NULL;
1581 }
1582
1583 /* Begin Allocation */
1584 while( inEndpoints < 15
1585 && inDevs < maxdevices
1586 && u->in[inEndpoints].cableId >= 0 ) {
1587 inDevs += on_bits((unsigned short)u->in[inEndpoints].cableId);
1588 mins[inEndpoints] = alloc_midi_in_endpoint( d, u->in[inEndpoints].endpoint );
1589 if ( mins[inEndpoints] == NULL )
1590 goto error_end;
1591 inEndpoints++;
1592 }
1593
1594 while( outEndpoints < 15
1595 && outDevs < maxdevices
1596 && u->out[outEndpoints].cableId >= 0 ) {
1597 outDevs += on_bits((unsigned short)u->out[outEndpoints].cableId);
1598 mouts[outEndpoints] = alloc_midi_out_endpoint( d, u->out[outEndpoints].endpoint );
1599 if ( mouts[outEndpoints] == NULL )
1600 goto error_end;
1601 outEndpoints++;
1602 }
1603
1604 devices = inDevs > outDevs ? inDevs : outDevs;
1605 devices = maxdevices > devices ? devices : maxdevices;
1606
1607 /* obtain space for device name (iProduct) if not known. */
1608 if ( ! u->deviceName ) {
1609 mdevs = (struct usb_mididev **)
1610 kmalloc(sizeof(struct usb_mididevs *)*devices
1611 + sizeof(char) * 256, GFP_KERNEL);
1612 } else {
1613 mdevs = (struct usb_mididev **)
1614 kmalloc(sizeof(struct usb_mididevs *)*devices, GFP_KERNEL);
1615 }
1616
1617 if ( !mdevs ) {
1618 /* devices = 0; */
1619 /* mdevs = NULL; */
1620 goto error_end;
1621 }
1622 for ( i=0 ; i<devices ; i++ ) {
1623 mdevs[i] = NULL;
1624 }
1625
1626 /* obtain device name (iProduct) if not known. */
1627 if ( ! u->deviceName ) {
1628 u->deviceName = (char *) (mdevs + devices);
1629 if ( ! d->have_langid && d->descriptor.iProduct) {
1630 alt = usb_get_string(d, 0, 0, u->deviceName, 250);
1631 if (alt < 0) {
1632 printk(KERN_INFO "error getting string descriptor 0 (error=%d)\n", alt);
1633 } else if (u->deviceName[0] < 4) {
1634 printk(KERN_INFO "string descriptor 0 too short (length = %d)\n", alt);
1635 } else {
1636 printk(KERN_INFO "string descriptor 0 found (length = %d)\n", alt);
1637 for(; alt >= 4; alt -= 2) {
1638 i = u->deviceName[alt-2] | (u->deviceName[alt-1]<< 8);
1639 printk(KERN_INFO "usb-midi: langid(%d) 0x%04x\n",
1640 (alt-4) >> 1, i);
1641 if ( ( ( i ^ ulangid ) & 0xff ) == 0 ) {
1642 d->have_langid = 1;
1643 d->string_langid = i;
1644 printk(KERN_INFO "usb-midi: langid(match) 0x%04x\n", i);
1645 if ( i == ulangid )
1646 break;
1647 }
1648 }
1649 }
1650 }
1651 u->deviceName[0] = (char) 0;
1652 if (d->descriptor.iProduct) {
1653 printk(KERN_INFO "usb-midi: fetchString(%d)\n", d->descriptor.iProduct);
1654 alt = usb_string(d, d->descriptor.iProduct, u->deviceName, 255);
1655 if( alt < 0 ) {
1656 u->deviceName[0] = (char) 0;
1657 }
1658 printk(KERN_INFO "usb-midi: fetchString = %d\n", alt);
1659 }
1660 /* Failsafe */
1661 if ( !u->deviceName[0] ) {
1662 if (le16_to_cpu(d->descriptor.idVendor) == USB_VENDOR_ID_ROLAND ) {
1663 strcpy(u->deviceName, "Unknown Roland");
1664 } else if (le16_to_cpu(d->descriptor.idVendor) == USB_VENDOR_ID_STEINBERG ) {
1665 strcpy(u->deviceName, "Unknown Steinberg");
1666 } else if (le16_to_cpu(d->descriptor.idVendor) == USB_VENDOR_ID_YAMAHA ) {
1667 strcpy(u->deviceName, "Unknown Yamaha");
1668 } else {
1669 strcpy(u->deviceName, "Unknown");
1670 }
1671 }
1672 }
1673
1674 inEndpoint = 0; inCableId = -1;
1675 outEndpoint = 0; outCableId = -1;
1676
1677 for ( i=0 ; i<devices ; i++ ) {
1678 for ( inCableId ++ ;
1679 inEndpoint <15
1680 && mins[inEndpoint]
1681 && !(u->in[inEndpoint].cableId & (1<<inCableId)) ;
1682 inCableId++ ) {
1683 if ( inCableId >= 16 ) {
1684 inEndpoint ++;
1685 inCableId = 0;
1686 }
1687 }
1688 min = mins[inEndpoint];
1689 for ( outCableId ++ ;
1690 outEndpoint <15
1691 && mouts[outEndpoint]
1692 && !(u->out[outEndpoint].cableId & (1<<outCableId)) ;
1693 outCableId++ ) {
1694 if ( outCableId >= 16 ) {
1695 outEndpoint ++;
1696 outCableId = 0;
1697 }
1698 }
1699 mout = mouts[outEndpoint];
1700
1701 mdevs[i] = allocMidiDev( s, min, mout, inCableId, outCableId );
1702 if ( mdevs[i] == NULL )
1703 goto error_end;
1704
1705 }
1706
1707 /* Success! */
1708 for ( i=0 ; i<devices ; i++ ) {
1709 list_add_tail( &mdevs[i]->list, &s->midiDevList );
1710 }
1711 for ( i=0 ; i<inEndpoints ; i++ ) {
1712 list_add_tail( &mins[i]->list, &s->inEndpointList );
1713 }
1714 for ( i=0 ; i<outEndpoints ; i++ ) {
1715 list_add_tail( &mouts[i]->list, &s->outEndpointList );
1716 }
1717
1718 printk(KERN_INFO "usbmidi: found [ %s ] (0x%04x:0x%04x), attached:\n", u->deviceName, u->idVendor, u->idProduct );
1719 for ( i=0 ; i<devices ; i++ ) {
1720 int dm = (mdevs[i]->dev_midi-2)>>4;
1721 if ( mdevs[i]->mout.ep != NULL && mdevs[i]->min.ep != NULL ) {
1722 printk(KERN_INFO "usbmidi: /dev/midi%02d: in (ep:%02x cid:%2d bufsiz:%2d) out (ep:%02x cid:%2d bufsiz:%2d)\n",
1723 dm,
1724 mdevs[i]->min.ep->endpoint|USB_DIR_IN, mdevs[i]->min.cableId, mdevs[i]->min.ep->recvBufSize,
1725 mdevs[i]->mout.ep->endpoint, mdevs[i]->mout.cableId, mdevs[i]->mout.ep->bufSize);
1726 } else if ( mdevs[i]->min.ep != NULL ) {
1727 printk(KERN_INFO "usbmidi: /dev/midi%02d: in (ep:%02x cid:%2d bufsiz:%02d)\n",
1728 dm,
1729 mdevs[i]->min.ep->endpoint|USB_DIR_IN, mdevs[i]->min.cableId, mdevs[i]->min.ep->recvBufSize);
1730 } else if ( mdevs[i]->mout.ep != NULL ) {
1731 printk(KERN_INFO "usbmidi: /dev/midi%02d: out (ep:%02x cid:%2d bufsiz:%02d)\n",
1732 dm,
1733 mdevs[i]->mout.ep->endpoint, mdevs[i]->mout.cableId, mdevs[i]->mout.ep->bufSize);
1734 }
1735 }
1736
1737 kfree(mdevs);
1738 return 0;
1739
1740 error_end:
1741 if ( mdevs != NULL ) {
1742 for ( i=0 ; i<devices ; i++ ) {
1743 if ( mdevs[i] != NULL ) {
1744 unregister_sound_midi( mdevs[i]->dev_midi );
1745 kfree(mdevs[i]);
1746 }
1747 }
1748 kfree(mdevs);
1749 }
1750
1751 for ( i=0 ; i<15 ; i++ ) {
1752 if ( mins[i] != NULL ) {
1753 remove_midi_in_endpoint( mins[i] );
1754 }
1755 if ( mouts[i] != NULL ) {
1756 remove_midi_out_endpoint( mouts[i] );
1757 }
1758 }
1759
1760 return -ENOMEM;
1761}
1762
1763/* ------------------------------------------------------------------------- */
1764
1765/** Attempt to scan YAMAHA's device descriptor and detect correct values of
1766 * them.
1767 * Return 0 on succes, negative on failure.
1768 * Called by usb_midi_probe();
1769 **/
1770
1771static int detect_yamaha_device( struct usb_device *d,
1772 struct usb_interface *iface, unsigned int ifnum,
1773 struct usb_midi_state *s)
1774{
1775 struct usb_host_interface *interface;
1776 struct usb_midi_device *u;
1777 unsigned char *buffer;
1778 int bufSize;
1779 int i;
1780 int alts=-1;
1781 int ret;
1782
1783 if (le16_to_cpu(d->descriptor.idVendor) != USB_VENDOR_ID_YAMAHA) {
1784 return -EINVAL;
1785 }
1786
1787 for ( i=0 ; i < iface->num_altsetting; i++ ) {
1788 interface = iface->altsetting + i;
1789
1790 if ( interface->desc.bInterfaceClass != 255 ||
1791 interface->desc.bInterfaceSubClass != 0 )
1792 continue;
1793 alts = interface->desc.bAlternateSetting;
1794 }
1795 if ( alts == -1 ) {
1796 return -EINVAL;
1797 }
1798
1799 printk(KERN_INFO "usb-midi: Found YAMAHA USB-MIDI device on dev %04x:%04x, iface %d\n",
1800 le16_to_cpu(d->descriptor.idVendor),
1801 le16_to_cpu(d->descriptor.idProduct), ifnum);
1802
1803 i = d->actconfig - d->config;
1804 buffer = d->rawdescriptors[i];
1805 bufSize = le16_to_cpu(d->actconfig->desc.wTotalLength);
1806
1807 u = parse_descriptor( d, buffer, bufSize, ifnum, alts, 1);
1808 if ( u == NULL ) {
1809 return -EINVAL;
1810 }
1811
1812 ret = alloc_usb_midi_device( d, s, u );
1813
1814 kfree(u);
1815
1816 return ret;
1817}
1818
1819
1820/** Scan table of known devices which are only partially compliant with
1821 * the MIDIStreaming specification.
1822 * Called by usb_midi_probe();
1823 *
1824 **/
1825
1826static int detect_vendor_specific_device( struct usb_device *d, unsigned int ifnum, struct usb_midi_state *s )
1827{
1828 struct usb_midi_device *u;
1829 int i;
1830 int ret = -ENXIO;
1831
1832 for ( i=0; i<VENDOR_SPECIFIC_USB_MIDI_DEVICES ; i++ ) {
1833 u=&(usb_midi_devices[i]);
1834
1835 if ( le16_to_cpu(d->descriptor.idVendor) != u->idVendor ||
1836 le16_to_cpu(d->descriptor.idProduct) != u->idProduct ||
1837 ifnum != u->interface )
1838 continue;
1839
1840 ret = alloc_usb_midi_device( d, s, u );
1841 break;
1842 }
1843
1844 return ret;
1845}
1846
1847
1848/** Attempt to match any config of an interface to a MIDISTREAMING interface.
1849 * Returns 0 on success, negative on failure.
1850 * Called by usb_midi_probe();
1851 **/
1852static int detect_midi_subclass(struct usb_device *d,
1853 struct usb_interface *iface, unsigned int ifnum,
1854 struct usb_midi_state *s)
1855{
1856 struct usb_host_interface *interface;
1857 struct usb_midi_device *u;
1858 unsigned char *buffer;
1859 int bufSize;
1860 int i;
1861 int alts=-1;
1862 int ret;
1863
1864 for ( i=0 ; i < iface->num_altsetting; i++ ) {
1865 interface = iface->altsetting + i;
1866
1867 if ( interface->desc.bInterfaceClass != USB_CLASS_AUDIO ||
1868 interface->desc.bInterfaceSubClass != USB_SUBCLASS_MIDISTREAMING )
1869 continue;
1870 alts = interface->desc.bAlternateSetting;
1871 }
1872 if ( alts == -1 ) {
1873 return -EINVAL;
1874 }
1875
1876 printk(KERN_INFO "usb-midi: Found MIDISTREAMING on dev %04x:%04x, iface %d\n",
1877 le16_to_cpu(d->descriptor.idVendor),
1878 le16_to_cpu(d->descriptor.idProduct), ifnum);
1879
1880
1881 /* From USB Spec v2.0, Section 9.5.
1882 If the class or vendor specific descriptors use the same format
1883 as standard descriptors (e.g., start with a length byte and
1884 followed by a type byte), they must be returned interleaved with
1885 standard descriptors in the configuration information returned by
1886 a GetDescriptor(Configuration) request. In this case, the class
1887 or vendor-specific descriptors must follow a related standard
1888 descriptor they modify or extend.
1889 */
1890
1891 i = d->actconfig - d->config;
1892 buffer = d->rawdescriptors[i];
1893 bufSize = le16_to_cpu(d->actconfig->desc.wTotalLength);
1894
1895 u = parse_descriptor( d, buffer, bufSize, ifnum, alts, 0);
1896 if ( u == NULL ) {
1897 return -EINVAL;
1898 }
1899
1900 ret = alloc_usb_midi_device( d, s, u );
1901
1902 kfree(u);
1903
1904 return ret;
1905}
1906
1907
1908/** When user has requested a specific device, match it exactly.
1909 *
1910 * Uses uvendor, uproduct, uinterface, ualt, umin, umout and ucable.
1911 * Called by usb_midi_probe();
1912 *
1913 **/
1914static int detect_by_hand(struct usb_device *d, unsigned int ifnum, struct usb_midi_state *s)
1915{
1916 struct usb_midi_device u;
1917
1918 if ( le16_to_cpu(d->descriptor.idVendor) != uvendor ||
1919 le16_to_cpu(d->descriptor.idProduct) != uproduct ||
1920 ifnum != uinterface ) {
1921 return -EINVAL;
1922 }
1923
1924 if ( ualt < 0 )
1925 ualt = -1;
1926
1927 if ( umin < 0 || umin > 15 )
1928 umin = 0x01 | USB_DIR_IN;
1929 if ( umout < 0 || umout > 15 )
1930 umout = 0x01;
1931 if ( ucable < 0 || ucable > 15 )
1932 ucable = 0;
1933
1934 u.deviceName = NULL; /* A flag for alloc_usb_midi_device to get device
1935 name from device. */
1936 u.idVendor = uvendor;
1937 u.idProduct = uproduct;
1938 u.interface = uinterface;
1939 u.altSetting = ualt;
1940
1941 u.in[0].endpoint = umin;
1942 u.in[0].cableId = (1<<ucable);
1943
1944 u.out[0].endpoint = umout;
1945 u.out[0].cableId = (1<<ucable);
1946
1947 return alloc_usb_midi_device( d, s, &u );
1948}
1949
1950
1951
1952/* ------------------------------------------------------------------------- */
1953
1954static int usb_midi_probe(struct usb_interface *intf,
1955 const struct usb_device_id *id)
1956{
1957 struct usb_midi_state *s;
1958 struct usb_device *dev = interface_to_usbdev(intf);
1959 int ifnum = intf->cur_altsetting->desc.bInterfaceNumber;
1960
1961 s = (struct usb_midi_state *)kmalloc(sizeof(struct usb_midi_state), GFP_KERNEL);
1962 if ( !s )
1963 return -ENOMEM;
1964
1965 memset( s, 0, sizeof(struct usb_midi_state) );
1966 INIT_LIST_HEAD(&s->midiDevList);
1967 INIT_LIST_HEAD(&s->inEndpointList);
1968 INIT_LIST_HEAD(&s->outEndpointList);
1969 s->usbdev = dev;
1970 s->count = 0;
1971 spin_lock_init(&s->lock);
1972
1973 if (
1974 detect_by_hand( dev, ifnum, s ) &&
1975 detect_midi_subclass( dev, intf, ifnum, s ) &&
1976 detect_vendor_specific_device( dev, ifnum, s ) &&
1977 detect_yamaha_device( dev, intf, ifnum, s) ) {
1978 kfree(s);
1979 return -EIO;
1980 }
1981
1982 down(&open_sem);
1983 list_add_tail(&s->mididev, &mididevs);
1984 up(&open_sem);
1985
1986 usb_set_intfdata (intf, s);
1987 return 0;
1988}
1989
1990
1991static void usb_midi_disconnect(struct usb_interface *intf)
1992{
1993 struct usb_midi_state *s = usb_get_intfdata (intf);
1994 struct usb_mididev *m;
1995
1996 if ( !s )
1997 return;
1998
1999 if ( s == (struct usb_midi_state *)-1 ) {
2000 return;
2001 }
2002 if ( !s->usbdev ) {
2003 return;
2004 }
2005 down(&open_sem);
2006 list_del(&s->mididev);
2007 INIT_LIST_HEAD(&s->mididev);
2008 s->usbdev = NULL;
2009 usb_set_intfdata (intf, NULL);
2010
2011 list_for_each_entry(m, &s->midiDevList, list) {
2012 wake_up(&(m->min.ep->wait));
2013 wake_up(&(m->mout.ep->wait));
2014 if ( m->dev_midi >= 0 ) {
2015 unregister_sound_midi(m->dev_midi);
2016 }
2017 m->dev_midi = -1;
2018 }
2019 release_midi_device(s);
2020 wake_up(&open_wait);
2021}
2022
2023/* we want to look at all devices by hand */
2024static struct usb_device_id id_table[] = {
2025 {.driver_info = 42},
2026 {}
2027};
2028
2029static struct usb_driver usb_midi_driver = {
2030 .owner = THIS_MODULE,
2031 .name = "midi",
2032 .probe = usb_midi_probe,
2033 .disconnect = usb_midi_disconnect,
2034 .id_table = id_table,
2035};
2036
2037/* ------------------------------------------------------------------------- */
2038
2039static int __init usb_midi_init(void)
2040{
2041 return usb_register(&usb_midi_driver);
2042}
2043
2044static void __exit usb_midi_exit(void)
2045{
2046 usb_deregister(&usb_midi_driver);
2047}
2048
2049module_init(usb_midi_init) ;
2050module_exit(usb_midi_exit) ;
2051
2052#ifdef HAVE_ALSA_SUPPORT
2053#define SNDRV_MAIN_OBJECT_FILE
2054#include "../../include/driver.h"
2055#include "../../include/control.h"
2056#include "../../include/info.h"
2057#include "../../include/cs46xx.h"
2058
2059/* ------------------------------------------------------------------------- */
2060
2061static int snd_usbmidi_input_close(snd_rawmidi_substream_t * substream)
2062{
2063 return 0;
2064}
2065
2066static int snd_usbmidi_input_open(snd_rawmidi_substream_t * substream )
2067{
2068 return 0;
2069}
2070
2071static void snd_usbmidi_input_trigger(snd_rawmidi_substream_t * substream, int up)
2072{
2073 return 0;
2074}
2075
2076
2077/* ------------------------------------------------------------------------- */
2078
2079static int snd_usbmidi_output_close(snd_rawmidi_substream_t * substream)
2080{
2081 return 0;
2082}
2083
2084static int snd_usbmidi_output_open(snd_rawmidi_substream_t * substream)
2085{
2086 return 0;
2087}
2088
2089static void snd_usb_midi_output_trigger(snd_rawmidi_substream_t * substream,
2090 int up)
2091{
2092 return 0;
2093}
2094
2095/* ------------------------------------------------------------------------- */
2096
2097static snd_rawmidi_ops_t snd_usbmidi_output =
2098{
2099 .open = snd_usbmidi_output_open,
2100 .close = snd_usbmidi_output_close,
2101 .trigger = snd_usbmidi_output_trigger,
2102};
2103static snd_rawmidi_ops_t snd_usbmidi_input =
2104{
2105 .open = snd_usbmidi_input_open,
2106 .close = snd_usbmidi_input_close,
2107 .trigger = snd_usbmidi_input_trigger,
2108};
2109
2110int snd_usbmidi_midi(cs46xx_t *chip, int device, snd_rawmidi_t **rrawmidi)
2111{
2112 snd_rawmidi_t *rmidi;
2113 int err;
2114
2115 if (rrawmidi)
2116 *rrawmidi = NULL;
2117 if ((err = snd_rawmidi_new(chip->card, "USB-MIDI", device, 1, 1, &rmidi)) < 0)
2118 return err;
2119 strcpy(rmidi->name, "USB-MIDI");
2120
2121 snd_rawmidi_set_ops( rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT, &snd_usbmidi_output );
2122 snd_rawmidi_set_ops( rmidi, SNDRV_RAWMIDI_STREAM_INPUT, &snd_usbmidi_input );
2123
2124 rmidi->info_flags |= SNDRV_RAWMIDI_INFO_OUTPUT | SNDRV_RAWMIDI_INFO_INPUT | SNDRV_RAWMIDI_INFO_DUPLEX;
2125
2126 rmidi->private_data = chip;
2127 chip->rmidi = rmidi;
2128 if (rrawmidi)
2129 *rrawmidi = NULL;
2130
2131 return 0;
2132}
2133
2134int snd_usbmidi_create( snd_card_t * card,
2135 struct pci_dev * pci,
2136 usbmidi_t ** rchip )
2137{
2138 usbmidi_t *chip;
2139 int err, idx;
2140 snd_region_t *region;
2141 static snd_device_opt_t ops = {
2142 .dev_free = snd_usbmidi_dev_free,
2143 };
2144
2145 *rchip = NULL;
2146 chip = snd_magic_kcalloc( usbmidi_t, 0, GFP_KERNEL );
2147 if ( chip == NULL )
2148 return -ENOMEM;
2149}
2150
2151EXPORT_SYMBOL(snd_usbmidi_create);
2152EXPORT_SYMBOL(snd_usbmidi_midi);
2153#endif /* HAVE_ALSA_SUPPORT */
2154
generated by cgit v1.2.2 (git 2.25.0) at 2024-12-13 11:29:37 -0500