2 * Abstract layer for MIDI v1.0 stream
3 * Copyright (c) by Jaroslav Kysela <perex@perex.cz>
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22 #include <sound/core.h>
23 #include <linux/major.h>
24 #include <linux/init.h>
25 #include <linux/sched.h>
26 #include <linux/slab.h>
27 #include <linux/time.h>
28 #include <linux/wait.h>
29 #include <linux/mutex.h>
30 #include <linux/moduleparam.h>
31 #include <linux/delay.h>
32 #include <sound/rawmidi.h>
33 #include <sound/info.h>
34 #include <sound/control.h>
35 #include <sound/minors.h>
36 #include <sound/initval.h>
38 MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>");
39 MODULE_DESCRIPTION("Midlevel RawMidi code for ALSA.");
40 MODULE_LICENSE("GPL");
42 #ifdef CONFIG_SND_OSSEMUL
43 static int midi_map
[SNDRV_CARDS
];
44 static int amidi_map
[SNDRV_CARDS
] = {[0 ... (SNDRV_CARDS
-1)] = 1};
45 module_param_array(midi_map
, int, NULL
, 0444);
46 MODULE_PARM_DESC(midi_map
, "Raw MIDI device number assigned to 1st OSS device.");
47 module_param_array(amidi_map
, int, NULL
, 0444);
48 MODULE_PARM_DESC(amidi_map
, "Raw MIDI device number assigned to 2nd OSS device.");
49 #endif /* CONFIG_SND_OSSEMUL */
51 static int snd_rawmidi_free(struct snd_rawmidi
*rawmidi
);
52 static int snd_rawmidi_dev_free(struct snd_device
*device
);
53 static int snd_rawmidi_dev_register(struct snd_device
*device
);
54 static int snd_rawmidi_dev_disconnect(struct snd_device
*device
);
56 static LIST_HEAD(snd_rawmidi_devices
);
57 static DEFINE_MUTEX(register_mutex
);
59 static struct snd_rawmidi
*snd_rawmidi_search(struct snd_card
*card
, int device
)
61 struct snd_rawmidi
*rawmidi
;
63 list_for_each_entry(rawmidi
, &snd_rawmidi_devices
, list
)
64 if (rawmidi
->card
== card
&& rawmidi
->device
== device
)
69 static inline unsigned short snd_rawmidi_file_flags(struct file
*file
)
71 switch (file
->f_mode
& (FMODE_READ
| FMODE_WRITE
)) {
73 return SNDRV_RAWMIDI_LFLG_OUTPUT
;
75 return SNDRV_RAWMIDI_LFLG_INPUT
;
77 return SNDRV_RAWMIDI_LFLG_OPEN
;
81 static inline int snd_rawmidi_ready(struct snd_rawmidi_substream
*substream
)
83 struct snd_rawmidi_runtime
*runtime
= substream
->runtime
;
84 return runtime
->avail
>= runtime
->avail_min
;
87 static inline int snd_rawmidi_ready_append(struct snd_rawmidi_substream
*substream
,
90 struct snd_rawmidi_runtime
*runtime
= substream
->runtime
;
91 return runtime
->avail
>= runtime
->avail_min
&&
92 (!substream
->append
|| runtime
->avail
>= count
);
95 static void snd_rawmidi_input_event_tasklet(unsigned long data
)
97 struct snd_rawmidi_substream
*substream
= (struct snd_rawmidi_substream
*)data
;
98 substream
->runtime
->event(substream
);
101 static void snd_rawmidi_output_trigger_tasklet(unsigned long data
)
103 struct snd_rawmidi_substream
*substream
= (struct snd_rawmidi_substream
*)data
;
104 substream
->ops
->trigger(substream
, 1);
107 static int snd_rawmidi_runtime_create(struct snd_rawmidi_substream
*substream
)
109 struct snd_rawmidi_runtime
*runtime
;
111 if ((runtime
= kzalloc(sizeof(*runtime
), GFP_KERNEL
)) == NULL
)
113 spin_lock_init(&runtime
->lock
);
114 init_waitqueue_head(&runtime
->sleep
);
115 if (substream
->stream
== SNDRV_RAWMIDI_STREAM_INPUT
)
116 tasklet_init(&runtime
->tasklet
,
117 snd_rawmidi_input_event_tasklet
,
118 (unsigned long)substream
);
120 tasklet_init(&runtime
->tasklet
,
121 snd_rawmidi_output_trigger_tasklet
,
122 (unsigned long)substream
);
123 runtime
->event
= NULL
;
124 runtime
->buffer_size
= PAGE_SIZE
;
125 runtime
->avail_min
= 1;
126 if (substream
->stream
== SNDRV_RAWMIDI_STREAM_INPUT
)
129 runtime
->avail
= runtime
->buffer_size
;
130 if ((runtime
->buffer
= kmalloc(runtime
->buffer_size
, GFP_KERNEL
)) == NULL
) {
134 runtime
->appl_ptr
= runtime
->hw_ptr
= 0;
135 substream
->runtime
= runtime
;
139 static int snd_rawmidi_runtime_free(struct snd_rawmidi_substream
*substream
)
141 struct snd_rawmidi_runtime
*runtime
= substream
->runtime
;
143 kfree(runtime
->buffer
);
145 substream
->runtime
= NULL
;
149 static inline void snd_rawmidi_output_trigger(struct snd_rawmidi_substream
*substream
,int up
)
152 tasklet_hi_schedule(&substream
->runtime
->tasklet
);
154 tasklet_kill(&substream
->runtime
->tasklet
);
155 substream
->ops
->trigger(substream
, 0);
159 static void snd_rawmidi_input_trigger(struct snd_rawmidi_substream
*substream
, int up
)
161 substream
->ops
->trigger(substream
, up
);
162 if (!up
&& substream
->runtime
->event
)
163 tasklet_kill(&substream
->runtime
->tasklet
);
166 int snd_rawmidi_drop_output(struct snd_rawmidi_substream
*substream
)
169 struct snd_rawmidi_runtime
*runtime
= substream
->runtime
;
171 snd_rawmidi_output_trigger(substream
, 0);
173 spin_lock_irqsave(&runtime
->lock
, flags
);
174 runtime
->appl_ptr
= runtime
->hw_ptr
= 0;
175 runtime
->avail
= runtime
->buffer_size
;
176 spin_unlock_irqrestore(&runtime
->lock
, flags
);
180 int snd_rawmidi_drain_output(struct snd_rawmidi_substream
*substream
)
184 struct snd_rawmidi_runtime
*runtime
= substream
->runtime
;
188 timeout
= wait_event_interruptible_timeout(runtime
->sleep
,
189 (runtime
->avail
>= runtime
->buffer_size
),
191 if (signal_pending(current
))
193 if (runtime
->avail
< runtime
->buffer_size
&& !timeout
) {
194 snd_printk(KERN_WARNING
"rawmidi drain error (avail = %li, buffer_size = %li)\n", (long)runtime
->avail
, (long)runtime
->buffer_size
);
198 if (err
!= -ERESTARTSYS
) {
199 /* we need wait a while to make sure that Tx FIFOs are empty */
200 if (substream
->ops
->drain
)
201 substream
->ops
->drain(substream
);
204 snd_rawmidi_drop_output(substream
);
209 int snd_rawmidi_drain_input(struct snd_rawmidi_substream
*substream
)
212 struct snd_rawmidi_runtime
*runtime
= substream
->runtime
;
214 snd_rawmidi_input_trigger(substream
, 0);
216 spin_lock_irqsave(&runtime
->lock
, flags
);
217 runtime
->appl_ptr
= runtime
->hw_ptr
= 0;
219 spin_unlock_irqrestore(&runtime
->lock
, flags
);
223 int snd_rawmidi_kernel_open(struct snd_card
*card
, int device
, int subdevice
,
224 int mode
, struct snd_rawmidi_file
* rfile
)
226 struct snd_rawmidi
*rmidi
;
227 struct list_head
*list1
, *list2
;
228 struct snd_rawmidi_substream
*sinput
= NULL
, *soutput
= NULL
;
229 struct snd_rawmidi_runtime
*input
= NULL
, *output
= NULL
;
233 rfile
->input
= rfile
->output
= NULL
;
234 mutex_lock(®ister_mutex
);
235 rmidi
= snd_rawmidi_search(card
, device
);
236 mutex_unlock(®ister_mutex
);
241 if (!try_module_get(rmidi
->card
->module
)) {
245 if (!(mode
& SNDRV_RAWMIDI_LFLG_NOOPENLOCK
))
246 mutex_lock(&rmidi
->open_mutex
);
247 if (mode
& SNDRV_RAWMIDI_LFLG_INPUT
) {
248 if (!(rmidi
->info_flags
& SNDRV_RAWMIDI_INFO_INPUT
)) {
252 if (subdevice
>= 0 && (unsigned int)subdevice
>= rmidi
->streams
[SNDRV_RAWMIDI_STREAM_INPUT
].substream_count
) {
256 if (rmidi
->streams
[SNDRV_RAWMIDI_STREAM_INPUT
].substream_opened
>=
257 rmidi
->streams
[SNDRV_RAWMIDI_STREAM_INPUT
].substream_count
) {
262 if (mode
& SNDRV_RAWMIDI_LFLG_OUTPUT
) {
263 if (!(rmidi
->info_flags
& SNDRV_RAWMIDI_INFO_OUTPUT
)) {
267 if (subdevice
>= 0 && (unsigned int)subdevice
>= rmidi
->streams
[SNDRV_RAWMIDI_STREAM_OUTPUT
].substream_count
) {
271 if (rmidi
->streams
[SNDRV_RAWMIDI_STREAM_OUTPUT
].substream_opened
>=
272 rmidi
->streams
[SNDRV_RAWMIDI_STREAM_OUTPUT
].substream_count
) {
277 list1
= rmidi
->streams
[SNDRV_RAWMIDI_STREAM_INPUT
].substreams
.next
;
279 if (list1
== &rmidi
->streams
[SNDRV_RAWMIDI_STREAM_INPUT
].substreams
) {
281 if (mode
& SNDRV_RAWMIDI_LFLG_INPUT
) {
287 sinput
= list_entry(list1
, struct snd_rawmidi_substream
, list
);
288 if ((mode
& SNDRV_RAWMIDI_LFLG_INPUT
) && sinput
->opened
)
290 if (subdevice
< 0 || (subdevice
>= 0 && subdevice
== sinput
->number
))
295 list2
= rmidi
->streams
[SNDRV_RAWMIDI_STREAM_OUTPUT
].substreams
.next
;
297 if (list2
== &rmidi
->streams
[SNDRV_RAWMIDI_STREAM_OUTPUT
].substreams
) {
299 if (mode
& SNDRV_RAWMIDI_LFLG_OUTPUT
) {
305 soutput
= list_entry(list2
, struct snd_rawmidi_substream
, list
);
306 if (mode
& SNDRV_RAWMIDI_LFLG_OUTPUT
) {
307 if (mode
& SNDRV_RAWMIDI_LFLG_APPEND
) {
308 if (soutput
->opened
&& !soutput
->append
)
315 if (subdevice
< 0 || (subdevice
>= 0 && subdevice
== soutput
->number
))
320 if (mode
& SNDRV_RAWMIDI_LFLG_INPUT
) {
321 if ((err
= snd_rawmidi_runtime_create(sinput
)) < 0)
323 input
= sinput
->runtime
;
324 if ((err
= sinput
->ops
->open(sinput
)) < 0)
327 rmidi
->streams
[SNDRV_RAWMIDI_STREAM_INPUT
].substream_opened
++;
331 if (mode
& SNDRV_RAWMIDI_LFLG_OUTPUT
) {
334 if ((err
= snd_rawmidi_runtime_create(soutput
)) < 0) {
335 if (mode
& SNDRV_RAWMIDI_LFLG_INPUT
)
336 sinput
->ops
->close(sinput
);
339 output
= soutput
->runtime
;
340 if ((err
= soutput
->ops
->open(soutput
)) < 0) {
341 if (mode
& SNDRV_RAWMIDI_LFLG_INPUT
)
342 sinput
->ops
->close(sinput
);
347 if (mode
& SNDRV_RAWMIDI_LFLG_APPEND
)
349 if (soutput
->use_count
++ == 0)
350 soutput
->active_sensing
= 1;
351 rmidi
->streams
[SNDRV_RAWMIDI_STREAM_OUTPUT
].substream_opened
++;
355 if (!(mode
& SNDRV_RAWMIDI_LFLG_NOOPENLOCK
))
356 mutex_unlock(&rmidi
->open_mutex
);
358 rfile
->rmidi
= rmidi
;
359 rfile
->input
= sinput
;
360 rfile
->output
= soutput
;
366 snd_rawmidi_runtime_free(sinput
);
368 snd_rawmidi_runtime_free(soutput
);
369 module_put(rmidi
->card
->module
);
370 if (!(mode
& SNDRV_RAWMIDI_LFLG_NOOPENLOCK
))
371 mutex_unlock(&rmidi
->open_mutex
);
376 static int snd_rawmidi_open(struct inode
*inode
, struct file
*file
)
378 int maj
= imajor(inode
);
379 struct snd_card
*card
;
381 unsigned short fflags
;
383 struct snd_rawmidi
*rmidi
;
384 struct snd_rawmidi_file
*rawmidi_file
;
386 struct snd_ctl_file
*kctl
;
388 if (maj
== snd_major
) {
389 rmidi
= snd_lookup_minor_data(iminor(inode
),
390 SNDRV_DEVICE_TYPE_RAWMIDI
);
391 #ifdef CONFIG_SND_OSSEMUL
392 } else if (maj
== SOUND_MAJOR
) {
393 rmidi
= snd_lookup_oss_minor_data(iminor(inode
),
394 SNDRV_OSS_DEVICE_TYPE_MIDI
);
401 if ((file
->f_flags
& O_APPEND
) && !(file
->f_flags
& O_NONBLOCK
))
402 return -EINVAL
; /* invalid combination */
404 err
= snd_card_file_add(card
, file
);
407 fflags
= snd_rawmidi_file_flags(file
);
408 if ((file
->f_flags
& O_APPEND
) || maj
== SOUND_MAJOR
) /* OSS emul? */
409 fflags
|= SNDRV_RAWMIDI_LFLG_APPEND
;
410 fflags
|= SNDRV_RAWMIDI_LFLG_NOOPENLOCK
;
411 rawmidi_file
= kmalloc(sizeof(*rawmidi_file
), GFP_KERNEL
);
412 if (rawmidi_file
== NULL
) {
413 snd_card_file_remove(card
, file
);
416 init_waitqueue_entry(&wait
, current
);
417 add_wait_queue(&rmidi
->open_wait
, &wait
);
418 mutex_lock(&rmidi
->open_mutex
);
421 read_lock(&card
->ctl_files_rwlock
);
422 list_for_each_entry(kctl
, &card
->ctl_files
, list
) {
423 if (kctl
->pid
== current
->pid
) {
424 subdevice
= kctl
->prefer_rawmidi_subdevice
;
429 read_unlock(&card
->ctl_files_rwlock
);
430 err
= snd_rawmidi_kernel_open(rmidi
->card
, rmidi
->device
,
431 subdevice
, fflags
, rawmidi_file
);
434 if (err
== -EAGAIN
) {
435 if (file
->f_flags
& O_NONBLOCK
) {
441 set_current_state(TASK_INTERRUPTIBLE
);
442 mutex_unlock(&rmidi
->open_mutex
);
444 mutex_lock(&rmidi
->open_mutex
);
445 if (signal_pending(current
)) {
450 #ifdef CONFIG_SND_OSSEMUL
451 if (rawmidi_file
->input
&& rawmidi_file
->input
->runtime
)
452 rawmidi_file
->input
->runtime
->oss
= (maj
== SOUND_MAJOR
);
453 if (rawmidi_file
->output
&& rawmidi_file
->output
->runtime
)
454 rawmidi_file
->output
->runtime
->oss
= (maj
== SOUND_MAJOR
);
456 remove_wait_queue(&rmidi
->open_wait
, &wait
);
458 file
->private_data
= rawmidi_file
;
460 snd_card_file_remove(card
, file
);
463 mutex_unlock(&rmidi
->open_mutex
);
467 int snd_rawmidi_kernel_release(struct snd_rawmidi_file
* rfile
)
469 struct snd_rawmidi
*rmidi
;
470 struct snd_rawmidi_substream
*substream
;
471 struct snd_rawmidi_runtime
*runtime
;
473 if (snd_BUG_ON(!rfile
))
475 rmidi
= rfile
->rmidi
;
476 mutex_lock(&rmidi
->open_mutex
);
477 if (rfile
->input
!= NULL
) {
478 substream
= rfile
->input
;
480 runtime
= substream
->runtime
;
481 snd_rawmidi_input_trigger(substream
, 0);
482 substream
->ops
->close(substream
);
483 if (runtime
->private_free
!= NULL
)
484 runtime
->private_free(substream
);
485 snd_rawmidi_runtime_free(substream
);
486 substream
->opened
= 0;
487 rmidi
->streams
[SNDRV_RAWMIDI_STREAM_INPUT
].substream_opened
--;
489 if (rfile
->output
!= NULL
) {
490 substream
= rfile
->output
;
491 rfile
->output
= NULL
;
492 if (--substream
->use_count
== 0) {
493 runtime
= substream
->runtime
;
494 if (substream
->active_sensing
) {
495 unsigned char buf
= 0xfe;
496 /* sending single active sensing message to shut the device up */
497 snd_rawmidi_kernel_write(substream
, &buf
, 1);
499 if (snd_rawmidi_drain_output(substream
) == -ERESTARTSYS
)
500 snd_rawmidi_output_trigger(substream
, 0);
501 substream
->ops
->close(substream
);
502 if (runtime
->private_free
!= NULL
)
503 runtime
->private_free(substream
);
504 snd_rawmidi_runtime_free(substream
);
505 substream
->opened
= 0;
506 substream
->append
= 0;
508 rmidi
->streams
[SNDRV_RAWMIDI_STREAM_OUTPUT
].substream_opened
--;
510 mutex_unlock(&rmidi
->open_mutex
);
511 module_put(rmidi
->card
->module
);
515 static int snd_rawmidi_release(struct inode
*inode
, struct file
*file
)
517 struct snd_rawmidi_file
*rfile
;
518 struct snd_rawmidi
*rmidi
;
521 rfile
= file
->private_data
;
522 err
= snd_rawmidi_kernel_release(rfile
);
523 rmidi
= rfile
->rmidi
;
524 wake_up(&rmidi
->open_wait
);
526 snd_card_file_remove(rmidi
->card
, file
);
530 static int snd_rawmidi_info(struct snd_rawmidi_substream
*substream
,
531 struct snd_rawmidi_info
*info
)
533 struct snd_rawmidi
*rmidi
;
535 if (substream
== NULL
)
537 rmidi
= substream
->rmidi
;
538 memset(info
, 0, sizeof(*info
));
539 info
->card
= rmidi
->card
->number
;
540 info
->device
= rmidi
->device
;
541 info
->subdevice
= substream
->number
;
542 info
->stream
= substream
->stream
;
543 info
->flags
= rmidi
->info_flags
;
544 strcpy(info
->id
, rmidi
->id
);
545 strcpy(info
->name
, rmidi
->name
);
546 strcpy(info
->subname
, substream
->name
);
547 info
->subdevices_count
= substream
->pstr
->substream_count
;
548 info
->subdevices_avail
= (substream
->pstr
->substream_count
-
549 substream
->pstr
->substream_opened
);
553 static int snd_rawmidi_info_user(struct snd_rawmidi_substream
*substream
,
554 struct snd_rawmidi_info __user
* _info
)
556 struct snd_rawmidi_info info
;
558 if ((err
= snd_rawmidi_info(substream
, &info
)) < 0)
560 if (copy_to_user(_info
, &info
, sizeof(struct snd_rawmidi_info
)))
565 int snd_rawmidi_info_select(struct snd_card
*card
, struct snd_rawmidi_info
*info
)
567 struct snd_rawmidi
*rmidi
;
568 struct snd_rawmidi_str
*pstr
;
569 struct snd_rawmidi_substream
*substream
;
571 mutex_lock(®ister_mutex
);
572 rmidi
= snd_rawmidi_search(card
, info
->device
);
573 mutex_unlock(®ister_mutex
);
576 if (info
->stream
< 0 || info
->stream
> 1)
578 pstr
= &rmidi
->streams
[info
->stream
];
579 if (pstr
->substream_count
== 0)
581 if (info
->subdevice
>= pstr
->substream_count
)
583 list_for_each_entry(substream
, &pstr
->substreams
, list
) {
584 if ((unsigned int)substream
->number
== info
->subdevice
)
585 return snd_rawmidi_info(substream
, info
);
590 static int snd_rawmidi_info_select_user(struct snd_card
*card
,
591 struct snd_rawmidi_info __user
*_info
)
594 struct snd_rawmidi_info info
;
595 if (get_user(info
.device
, &_info
->device
))
597 if (get_user(info
.stream
, &_info
->stream
))
599 if (get_user(info
.subdevice
, &_info
->subdevice
))
601 if ((err
= snd_rawmidi_info_select(card
, &info
)) < 0)
603 if (copy_to_user(_info
, &info
, sizeof(struct snd_rawmidi_info
)))
608 int snd_rawmidi_output_params(struct snd_rawmidi_substream
*substream
,
609 struct snd_rawmidi_params
* params
)
612 struct snd_rawmidi_runtime
*runtime
= substream
->runtime
;
614 if (substream
->append
&& substream
->use_count
> 1)
616 snd_rawmidi_drain_output(substream
);
617 if (params
->buffer_size
< 32 || params
->buffer_size
> 1024L * 1024L) {
620 if (params
->avail_min
< 1 || params
->avail_min
> params
->buffer_size
) {
623 if (params
->buffer_size
!= runtime
->buffer_size
) {
624 newbuf
= kmalloc(params
->buffer_size
, GFP_KERNEL
);
627 kfree(runtime
->buffer
);
628 runtime
->buffer
= newbuf
;
629 runtime
->buffer_size
= params
->buffer_size
;
630 runtime
->avail
= runtime
->buffer_size
;
632 runtime
->avail_min
= params
->avail_min
;
633 substream
->active_sensing
= !params
->no_active_sensing
;
637 int snd_rawmidi_input_params(struct snd_rawmidi_substream
*substream
,
638 struct snd_rawmidi_params
* params
)
641 struct snd_rawmidi_runtime
*runtime
= substream
->runtime
;
643 snd_rawmidi_drain_input(substream
);
644 if (params
->buffer_size
< 32 || params
->buffer_size
> 1024L * 1024L) {
647 if (params
->avail_min
< 1 || params
->avail_min
> params
->buffer_size
) {
650 if (params
->buffer_size
!= runtime
->buffer_size
) {
651 newbuf
= kmalloc(params
->buffer_size
, GFP_KERNEL
);
654 kfree(runtime
->buffer
);
655 runtime
->buffer
= newbuf
;
656 runtime
->buffer_size
= params
->buffer_size
;
658 runtime
->avail_min
= params
->avail_min
;
662 static int snd_rawmidi_output_status(struct snd_rawmidi_substream
*substream
,
663 struct snd_rawmidi_status
* status
)
665 struct snd_rawmidi_runtime
*runtime
= substream
->runtime
;
667 memset(status
, 0, sizeof(*status
));
668 status
->stream
= SNDRV_RAWMIDI_STREAM_OUTPUT
;
669 spin_lock_irq(&runtime
->lock
);
670 status
->avail
= runtime
->avail
;
671 spin_unlock_irq(&runtime
->lock
);
675 static int snd_rawmidi_input_status(struct snd_rawmidi_substream
*substream
,
676 struct snd_rawmidi_status
* status
)
678 struct snd_rawmidi_runtime
*runtime
= substream
->runtime
;
680 memset(status
, 0, sizeof(*status
));
681 status
->stream
= SNDRV_RAWMIDI_STREAM_INPUT
;
682 spin_lock_irq(&runtime
->lock
);
683 status
->avail
= runtime
->avail
;
684 status
->xruns
= runtime
->xruns
;
686 spin_unlock_irq(&runtime
->lock
);
690 static long snd_rawmidi_ioctl(struct file
*file
, unsigned int cmd
, unsigned long arg
)
692 struct snd_rawmidi_file
*rfile
;
693 void __user
*argp
= (void __user
*)arg
;
695 rfile
= file
->private_data
;
696 if (((cmd
>> 8) & 0xff) != 'W')
699 case SNDRV_RAWMIDI_IOCTL_PVERSION
:
700 return put_user(SNDRV_RAWMIDI_VERSION
, (int __user
*)argp
) ? -EFAULT
: 0;
701 case SNDRV_RAWMIDI_IOCTL_INFO
:
704 struct snd_rawmidi_info __user
*info
= argp
;
705 if (get_user(stream
, &info
->stream
))
708 case SNDRV_RAWMIDI_STREAM_INPUT
:
709 return snd_rawmidi_info_user(rfile
->input
, info
);
710 case SNDRV_RAWMIDI_STREAM_OUTPUT
:
711 return snd_rawmidi_info_user(rfile
->output
, info
);
716 case SNDRV_RAWMIDI_IOCTL_PARAMS
:
718 struct snd_rawmidi_params params
;
719 if (copy_from_user(¶ms
, argp
, sizeof(struct snd_rawmidi_params
)))
721 switch (params
.stream
) {
722 case SNDRV_RAWMIDI_STREAM_OUTPUT
:
723 if (rfile
->output
== NULL
)
725 return snd_rawmidi_output_params(rfile
->output
, ¶ms
);
726 case SNDRV_RAWMIDI_STREAM_INPUT
:
727 if (rfile
->input
== NULL
)
729 return snd_rawmidi_input_params(rfile
->input
, ¶ms
);
734 case SNDRV_RAWMIDI_IOCTL_STATUS
:
737 struct snd_rawmidi_status status
;
738 if (copy_from_user(&status
, argp
, sizeof(struct snd_rawmidi_status
)))
740 switch (status
.stream
) {
741 case SNDRV_RAWMIDI_STREAM_OUTPUT
:
742 if (rfile
->output
== NULL
)
744 err
= snd_rawmidi_output_status(rfile
->output
, &status
);
746 case SNDRV_RAWMIDI_STREAM_INPUT
:
747 if (rfile
->input
== NULL
)
749 err
= snd_rawmidi_input_status(rfile
->input
, &status
);
756 if (copy_to_user(argp
, &status
, sizeof(struct snd_rawmidi_status
)))
760 case SNDRV_RAWMIDI_IOCTL_DROP
:
763 if (get_user(val
, (int __user
*) argp
))
766 case SNDRV_RAWMIDI_STREAM_OUTPUT
:
767 if (rfile
->output
== NULL
)
769 return snd_rawmidi_drop_output(rfile
->output
);
774 case SNDRV_RAWMIDI_IOCTL_DRAIN
:
777 if (get_user(val
, (int __user
*) argp
))
780 case SNDRV_RAWMIDI_STREAM_OUTPUT
:
781 if (rfile
->output
== NULL
)
783 return snd_rawmidi_drain_output(rfile
->output
);
784 case SNDRV_RAWMIDI_STREAM_INPUT
:
785 if (rfile
->input
== NULL
)
787 return snd_rawmidi_drain_input(rfile
->input
);
792 #ifdef CONFIG_SND_DEBUG
794 snd_printk(KERN_WARNING
"rawmidi: unknown command = 0x%x\n", cmd
);
800 static int snd_rawmidi_control_ioctl(struct snd_card
*card
,
801 struct snd_ctl_file
*control
,
805 void __user
*argp
= (void __user
*)arg
;
808 case SNDRV_CTL_IOCTL_RAWMIDI_NEXT_DEVICE
:
812 if (get_user(device
, (int __user
*)argp
))
814 mutex_lock(®ister_mutex
);
815 device
= device
< 0 ? 0 : device
+ 1;
816 while (device
< SNDRV_RAWMIDI_DEVICES
) {
817 if (snd_rawmidi_search(card
, device
))
821 if (device
== SNDRV_RAWMIDI_DEVICES
)
823 mutex_unlock(®ister_mutex
);
824 if (put_user(device
, (int __user
*)argp
))
828 case SNDRV_CTL_IOCTL_RAWMIDI_PREFER_SUBDEVICE
:
832 if (get_user(val
, (int __user
*)argp
))
834 control
->prefer_rawmidi_subdevice
= val
;
837 case SNDRV_CTL_IOCTL_RAWMIDI_INFO
:
838 return snd_rawmidi_info_select_user(card
, argp
);
844 * snd_rawmidi_receive - receive the input data from the device
845 * @substream: the rawmidi substream
846 * @buffer: the buffer pointer
847 * @count: the data size to read
849 * Reads the data from the internal buffer.
851 * Returns the size of read data, or a negative error code on failure.
853 int snd_rawmidi_receive(struct snd_rawmidi_substream
*substream
,
854 const unsigned char *buffer
, int count
)
857 int result
= 0, count1
;
858 struct snd_rawmidi_runtime
*runtime
= substream
->runtime
;
860 if (runtime
->buffer
== NULL
) {
861 snd_printd("snd_rawmidi_receive: input is not active!!!\n");
864 spin_lock_irqsave(&runtime
->lock
, flags
);
865 if (count
== 1) { /* special case, faster code */
867 if (runtime
->avail
< runtime
->buffer_size
) {
868 runtime
->buffer
[runtime
->hw_ptr
++] = buffer
[0];
869 runtime
->hw_ptr
%= runtime
->buffer_size
;
876 substream
->bytes
+= count
;
877 count1
= runtime
->buffer_size
- runtime
->hw_ptr
;
880 if (count1
> (int)(runtime
->buffer_size
- runtime
->avail
))
881 count1
= runtime
->buffer_size
- runtime
->avail
;
882 memcpy(runtime
->buffer
+ runtime
->hw_ptr
, buffer
, count1
);
883 runtime
->hw_ptr
+= count1
;
884 runtime
->hw_ptr
%= runtime
->buffer_size
;
885 runtime
->avail
+= count1
;
891 if (count1
> (int)(runtime
->buffer_size
- runtime
->avail
)) {
892 count1
= runtime
->buffer_size
- runtime
->avail
;
893 runtime
->xruns
+= count
- count1
;
896 memcpy(runtime
->buffer
, buffer
, count1
);
897 runtime
->hw_ptr
= count1
;
898 runtime
->avail
+= count1
;
905 tasklet_hi_schedule(&runtime
->tasklet
);
906 else if (snd_rawmidi_ready(substream
))
907 wake_up(&runtime
->sleep
);
909 spin_unlock_irqrestore(&runtime
->lock
, flags
);
913 static long snd_rawmidi_kernel_read1(struct snd_rawmidi_substream
*substream
,
914 unsigned char __user
*userbuf
,
915 unsigned char *kernelbuf
, long count
)
918 long result
= 0, count1
;
919 struct snd_rawmidi_runtime
*runtime
= substream
->runtime
;
921 while (count
> 0 && runtime
->avail
) {
922 count1
= runtime
->buffer_size
- runtime
->appl_ptr
;
925 spin_lock_irqsave(&runtime
->lock
, flags
);
926 if (count1
> (int)runtime
->avail
)
927 count1
= runtime
->avail
;
929 memcpy(kernelbuf
+ result
, runtime
->buffer
+ runtime
->appl_ptr
, count1
);
931 spin_unlock_irqrestore(&runtime
->lock
, flags
);
932 if (copy_to_user(userbuf
+ result
,
933 runtime
->buffer
+ runtime
->appl_ptr
, count1
)) {
934 return result
> 0 ? result
: -EFAULT
;
936 spin_lock_irqsave(&runtime
->lock
, flags
);
938 runtime
->appl_ptr
+= count1
;
939 runtime
->appl_ptr
%= runtime
->buffer_size
;
940 runtime
->avail
-= count1
;
941 spin_unlock_irqrestore(&runtime
->lock
, flags
);
948 long snd_rawmidi_kernel_read(struct snd_rawmidi_substream
*substream
,
949 unsigned char *buf
, long count
)
951 snd_rawmidi_input_trigger(substream
, 1);
952 return snd_rawmidi_kernel_read1(substream
, NULL
/*userbuf*/, buf
, count
);
955 static ssize_t
snd_rawmidi_read(struct file
*file
, char __user
*buf
, size_t count
,
960 struct snd_rawmidi_file
*rfile
;
961 struct snd_rawmidi_substream
*substream
;
962 struct snd_rawmidi_runtime
*runtime
;
964 rfile
= file
->private_data
;
965 substream
= rfile
->input
;
966 if (substream
== NULL
)
968 runtime
= substream
->runtime
;
969 snd_rawmidi_input_trigger(substream
, 1);
972 spin_lock_irq(&runtime
->lock
);
973 while (!snd_rawmidi_ready(substream
)) {
975 if ((file
->f_flags
& O_NONBLOCK
) != 0 || result
> 0) {
976 spin_unlock_irq(&runtime
->lock
);
977 return result
> 0 ? result
: -EAGAIN
;
979 init_waitqueue_entry(&wait
, current
);
980 add_wait_queue(&runtime
->sleep
, &wait
);
981 set_current_state(TASK_INTERRUPTIBLE
);
982 spin_unlock_irq(&runtime
->lock
);
984 remove_wait_queue(&runtime
->sleep
, &wait
);
985 if (signal_pending(current
))
986 return result
> 0 ? result
: -ERESTARTSYS
;
988 return result
> 0 ? result
: -EIO
;
989 spin_lock_irq(&runtime
->lock
);
991 spin_unlock_irq(&runtime
->lock
);
992 count1
= snd_rawmidi_kernel_read1(substream
,
993 (unsigned char __user
*)buf
,
997 return result
> 0 ? result
: count1
;
1006 * snd_rawmidi_transmit_empty - check whether the output buffer is empty
1007 * @substream: the rawmidi substream
1009 * Returns 1 if the internal output buffer is empty, 0 if not.
1011 int snd_rawmidi_transmit_empty(struct snd_rawmidi_substream
*substream
)
1013 struct snd_rawmidi_runtime
*runtime
= substream
->runtime
;
1015 unsigned long flags
;
1017 if (runtime
->buffer
== NULL
) {
1018 snd_printd("snd_rawmidi_transmit_empty: output is not active!!!\n");
1021 spin_lock_irqsave(&runtime
->lock
, flags
);
1022 result
= runtime
->avail
>= runtime
->buffer_size
;
1023 spin_unlock_irqrestore(&runtime
->lock
, flags
);
1028 * snd_rawmidi_transmit_peek - copy data from the internal buffer
1029 * @substream: the rawmidi substream
1030 * @buffer: the buffer pointer
1031 * @count: data size to transfer
1033 * Copies data from the internal output buffer to the given buffer.
1035 * Call this in the interrupt handler when the midi output is ready,
1036 * and call snd_rawmidi_transmit_ack() after the transmission is
1039 * Returns the size of copied data, or a negative error code on failure.
1041 int snd_rawmidi_transmit_peek(struct snd_rawmidi_substream
*substream
,
1042 unsigned char *buffer
, int count
)
1044 unsigned long flags
;
1046 struct snd_rawmidi_runtime
*runtime
= substream
->runtime
;
1048 if (runtime
->buffer
== NULL
) {
1049 snd_printd("snd_rawmidi_transmit_peek: output is not active!!!\n");
1053 spin_lock_irqsave(&runtime
->lock
, flags
);
1054 if (runtime
->avail
>= runtime
->buffer_size
) {
1055 /* warning: lowlevel layer MUST trigger down the hardware */
1058 if (count
== 1) { /* special case, faster code */
1059 *buffer
= runtime
->buffer
[runtime
->hw_ptr
];
1062 count1
= runtime
->buffer_size
- runtime
->hw_ptr
;
1065 if (count1
> (int)(runtime
->buffer_size
- runtime
->avail
))
1066 count1
= runtime
->buffer_size
- runtime
->avail
;
1067 memcpy(buffer
, runtime
->buffer
+ runtime
->hw_ptr
, count1
);
1071 if (count
> (int)(runtime
->buffer_size
- runtime
->avail
- count1
))
1072 count
= runtime
->buffer_size
- runtime
->avail
- count1
;
1073 memcpy(buffer
+ count1
, runtime
->buffer
, count
);
1078 spin_unlock_irqrestore(&runtime
->lock
, flags
);
1083 * snd_rawmidi_transmit_ack - acknowledge the transmission
1084 * @substream: the rawmidi substream
1085 * @count: the tranferred count
1087 * Advances the hardware pointer for the internal output buffer with
1088 * the given size and updates the condition.
1089 * Call after the transmission is finished.
1091 * Returns the advanced size if successful, or a negative error code on failure.
1093 int snd_rawmidi_transmit_ack(struct snd_rawmidi_substream
*substream
, int count
)
1095 unsigned long flags
;
1096 struct snd_rawmidi_runtime
*runtime
= substream
->runtime
;
1098 if (runtime
->buffer
== NULL
) {
1099 snd_printd("snd_rawmidi_transmit_ack: output is not active!!!\n");
1102 spin_lock_irqsave(&runtime
->lock
, flags
);
1103 snd_BUG_ON(runtime
->avail
+ count
> runtime
->buffer_size
);
1104 runtime
->hw_ptr
+= count
;
1105 runtime
->hw_ptr
%= runtime
->buffer_size
;
1106 runtime
->avail
+= count
;
1107 substream
->bytes
+= count
;
1109 if (runtime
->drain
|| snd_rawmidi_ready(substream
))
1110 wake_up(&runtime
->sleep
);
1112 spin_unlock_irqrestore(&runtime
->lock
, flags
);
1117 * snd_rawmidi_transmit - copy from the buffer to the device
1118 * @substream: the rawmidi substream
1119 * @buffer: the buffer pointer
1120 * @count: the data size to transfer
1122 * Copies data from the buffer to the device and advances the pointer.
1124 * Returns the copied size if successful, or a negative error code on failure.
1126 int snd_rawmidi_transmit(struct snd_rawmidi_substream
*substream
,
1127 unsigned char *buffer
, int count
)
1129 count
= snd_rawmidi_transmit_peek(substream
, buffer
, count
);
1132 return snd_rawmidi_transmit_ack(substream
, count
);
1135 static long snd_rawmidi_kernel_write1(struct snd_rawmidi_substream
*substream
,
1136 const unsigned char __user
*userbuf
,
1137 const unsigned char *kernelbuf
,
1140 unsigned long flags
;
1141 long count1
, result
;
1142 struct snd_rawmidi_runtime
*runtime
= substream
->runtime
;
1144 if (snd_BUG_ON(!kernelbuf
&& !userbuf
))
1146 if (snd_BUG_ON(!runtime
->buffer
))
1150 spin_lock_irqsave(&runtime
->lock
, flags
);
1151 if (substream
->append
) {
1152 if ((long)runtime
->avail
< count
) {
1153 spin_unlock_irqrestore(&runtime
->lock
, flags
);
1157 while (count
> 0 && runtime
->avail
> 0) {
1158 count1
= runtime
->buffer_size
- runtime
->appl_ptr
;
1161 if (count1
> (long)runtime
->avail
)
1162 count1
= runtime
->avail
;
1164 memcpy(runtime
->buffer
+ runtime
->appl_ptr
,
1165 kernelbuf
+ result
, count1
);
1167 spin_unlock_irqrestore(&runtime
->lock
, flags
);
1168 if (copy_from_user(runtime
->buffer
+ runtime
->appl_ptr
,
1169 userbuf
+ result
, count1
)) {
1170 spin_lock_irqsave(&runtime
->lock
, flags
);
1171 result
= result
> 0 ? result
: -EFAULT
;
1174 spin_lock_irqsave(&runtime
->lock
, flags
);
1176 runtime
->appl_ptr
+= count1
;
1177 runtime
->appl_ptr
%= runtime
->buffer_size
;
1178 runtime
->avail
-= count1
;
1183 count1
= runtime
->avail
< runtime
->buffer_size
;
1184 spin_unlock_irqrestore(&runtime
->lock
, flags
);
1186 snd_rawmidi_output_trigger(substream
, 1);
1190 long snd_rawmidi_kernel_write(struct snd_rawmidi_substream
*substream
,
1191 const unsigned char *buf
, long count
)
1193 return snd_rawmidi_kernel_write1(substream
, NULL
, buf
, count
);
1196 static ssize_t
snd_rawmidi_write(struct file
*file
, const char __user
*buf
,
1197 size_t count
, loff_t
*offset
)
1199 long result
, timeout
;
1201 struct snd_rawmidi_file
*rfile
;
1202 struct snd_rawmidi_runtime
*runtime
;
1203 struct snd_rawmidi_substream
*substream
;
1205 rfile
= file
->private_data
;
1206 substream
= rfile
->output
;
1207 runtime
= substream
->runtime
;
1208 /* we cannot put an atomic message to our buffer */
1209 if (substream
->append
&& count
> runtime
->buffer_size
)
1213 spin_lock_irq(&runtime
->lock
);
1214 while (!snd_rawmidi_ready_append(substream
, count
)) {
1216 if (file
->f_flags
& O_NONBLOCK
) {
1217 spin_unlock_irq(&runtime
->lock
);
1218 return result
> 0 ? result
: -EAGAIN
;
1220 init_waitqueue_entry(&wait
, current
);
1221 add_wait_queue(&runtime
->sleep
, &wait
);
1222 set_current_state(TASK_INTERRUPTIBLE
);
1223 spin_unlock_irq(&runtime
->lock
);
1224 timeout
= schedule_timeout(30 * HZ
);
1225 remove_wait_queue(&runtime
->sleep
, &wait
);
1226 if (signal_pending(current
))
1227 return result
> 0 ? result
: -ERESTARTSYS
;
1228 if (!runtime
->avail
&& !timeout
)
1229 return result
> 0 ? result
: -EIO
;
1230 spin_lock_irq(&runtime
->lock
);
1232 spin_unlock_irq(&runtime
->lock
);
1233 count1
= snd_rawmidi_kernel_write1(substream
, buf
, NULL
, count
);
1235 return result
> 0 ? result
: count1
;
1238 if ((size_t)count1
< count
&& (file
->f_flags
& O_NONBLOCK
))
1242 if (file
->f_flags
& O_SYNC
) {
1243 spin_lock_irq(&runtime
->lock
);
1244 while (runtime
->avail
!= runtime
->buffer_size
) {
1246 unsigned int last_avail
= runtime
->avail
;
1247 init_waitqueue_entry(&wait
, current
);
1248 add_wait_queue(&runtime
->sleep
, &wait
);
1249 set_current_state(TASK_INTERRUPTIBLE
);
1250 spin_unlock_irq(&runtime
->lock
);
1251 timeout
= schedule_timeout(30 * HZ
);
1252 remove_wait_queue(&runtime
->sleep
, &wait
);
1253 if (signal_pending(current
))
1254 return result
> 0 ? result
: -ERESTARTSYS
;
1255 if (runtime
->avail
== last_avail
&& !timeout
)
1256 return result
> 0 ? result
: -EIO
;
1257 spin_lock_irq(&runtime
->lock
);
1259 spin_unlock_irq(&runtime
->lock
);
1264 static unsigned int snd_rawmidi_poll(struct file
*file
, poll_table
* wait
)
1266 struct snd_rawmidi_file
*rfile
;
1267 struct snd_rawmidi_runtime
*runtime
;
1270 rfile
= file
->private_data
;
1271 if (rfile
->input
!= NULL
) {
1272 runtime
= rfile
->input
->runtime
;
1273 snd_rawmidi_input_trigger(rfile
->input
, 1);
1274 poll_wait(file
, &runtime
->sleep
, wait
);
1276 if (rfile
->output
!= NULL
) {
1277 runtime
= rfile
->output
->runtime
;
1278 poll_wait(file
, &runtime
->sleep
, wait
);
1281 if (rfile
->input
!= NULL
) {
1282 if (snd_rawmidi_ready(rfile
->input
))
1283 mask
|= POLLIN
| POLLRDNORM
;
1285 if (rfile
->output
!= NULL
) {
1286 if (snd_rawmidi_ready(rfile
->output
))
1287 mask
|= POLLOUT
| POLLWRNORM
;
1294 #ifdef CONFIG_COMPAT
1295 #include "rawmidi_compat.c"
1297 #define snd_rawmidi_ioctl_compat NULL
1304 static void snd_rawmidi_proc_info_read(struct snd_info_entry
*entry
,
1305 struct snd_info_buffer
*buffer
)
1307 struct snd_rawmidi
*rmidi
;
1308 struct snd_rawmidi_substream
*substream
;
1309 struct snd_rawmidi_runtime
*runtime
;
1311 rmidi
= entry
->private_data
;
1312 snd_iprintf(buffer
, "%s\n\n", rmidi
->name
);
1313 mutex_lock(&rmidi
->open_mutex
);
1314 if (rmidi
->info_flags
& SNDRV_RAWMIDI_INFO_OUTPUT
) {
1315 list_for_each_entry(substream
,
1316 &rmidi
->streams
[SNDRV_RAWMIDI_STREAM_OUTPUT
].substreams
,
1320 " Tx bytes : %lu\n",
1322 (unsigned long) substream
->bytes
);
1323 if (substream
->opened
) {
1324 runtime
= substream
->runtime
;
1327 " Buffer size : %lu\n"
1329 runtime
->oss
? "OSS compatible" : "native",
1330 (unsigned long) runtime
->buffer_size
,
1331 (unsigned long) runtime
->avail
);
1335 if (rmidi
->info_flags
& SNDRV_RAWMIDI_INFO_INPUT
) {
1336 list_for_each_entry(substream
,
1337 &rmidi
->streams
[SNDRV_RAWMIDI_STREAM_INPUT
].substreams
,
1341 " Rx bytes : %lu\n",
1343 (unsigned long) substream
->bytes
);
1344 if (substream
->opened
) {
1345 runtime
= substream
->runtime
;
1347 " Buffer size : %lu\n"
1349 " Overruns : %lu\n",
1350 (unsigned long) runtime
->buffer_size
,
1351 (unsigned long) runtime
->avail
,
1352 (unsigned long) runtime
->xruns
);
1356 mutex_unlock(&rmidi
->open_mutex
);
1360 * Register functions
1363 static const struct file_operations snd_rawmidi_f_ops
=
1365 .owner
= THIS_MODULE
,
1366 .read
= snd_rawmidi_read
,
1367 .write
= snd_rawmidi_write
,
1368 .open
= snd_rawmidi_open
,
1369 .release
= snd_rawmidi_release
,
1370 .poll
= snd_rawmidi_poll
,
1371 .unlocked_ioctl
= snd_rawmidi_ioctl
,
1372 .compat_ioctl
= snd_rawmidi_ioctl_compat
,
1375 static int snd_rawmidi_alloc_substreams(struct snd_rawmidi
*rmidi
,
1376 struct snd_rawmidi_str
*stream
,
1380 struct snd_rawmidi_substream
*substream
;
1383 for (idx
= 0; idx
< count
; idx
++) {
1384 substream
= kzalloc(sizeof(*substream
), GFP_KERNEL
);
1385 if (substream
== NULL
) {
1386 snd_printk(KERN_ERR
"rawmidi: cannot allocate substream\n");
1389 substream
->stream
= direction
;
1390 substream
->number
= idx
;
1391 substream
->rmidi
= rmidi
;
1392 substream
->pstr
= stream
;
1393 list_add_tail(&substream
->list
, &stream
->substreams
);
1394 stream
->substream_count
++;
1400 * snd_rawmidi_new - create a rawmidi instance
1401 * @card: the card instance
1402 * @id: the id string
1403 * @device: the device index
1404 * @output_count: the number of output streams
1405 * @input_count: the number of input streams
1406 * @rrawmidi: the pointer to store the new rawmidi instance
1408 * Creates a new rawmidi instance.
1409 * Use snd_rawmidi_set_ops() to set the operators to the new instance.
1411 * Returns zero if successful, or a negative error code on failure.
1413 int snd_rawmidi_new(struct snd_card
*card
, char *id
, int device
,
1414 int output_count
, int input_count
,
1415 struct snd_rawmidi
** rrawmidi
)
1417 struct snd_rawmidi
*rmidi
;
1419 static struct snd_device_ops ops
= {
1420 .dev_free
= snd_rawmidi_dev_free
,
1421 .dev_register
= snd_rawmidi_dev_register
,
1422 .dev_disconnect
= snd_rawmidi_dev_disconnect
,
1425 if (snd_BUG_ON(!card
))
1429 rmidi
= kzalloc(sizeof(*rmidi
), GFP_KERNEL
);
1430 if (rmidi
== NULL
) {
1431 snd_printk(KERN_ERR
"rawmidi: cannot allocate\n");
1435 rmidi
->device
= device
;
1436 mutex_init(&rmidi
->open_mutex
);
1437 init_waitqueue_head(&rmidi
->open_wait
);
1438 INIT_LIST_HEAD(&rmidi
->streams
[SNDRV_RAWMIDI_STREAM_INPUT
].substreams
);
1439 INIT_LIST_HEAD(&rmidi
->streams
[SNDRV_RAWMIDI_STREAM_OUTPUT
].substreams
);
1442 strlcpy(rmidi
->id
, id
, sizeof(rmidi
->id
));
1443 if ((err
= snd_rawmidi_alloc_substreams(rmidi
,
1444 &rmidi
->streams
[SNDRV_RAWMIDI_STREAM_INPUT
],
1445 SNDRV_RAWMIDI_STREAM_INPUT
,
1446 input_count
)) < 0) {
1447 snd_rawmidi_free(rmidi
);
1450 if ((err
= snd_rawmidi_alloc_substreams(rmidi
,
1451 &rmidi
->streams
[SNDRV_RAWMIDI_STREAM_OUTPUT
],
1452 SNDRV_RAWMIDI_STREAM_OUTPUT
,
1453 output_count
)) < 0) {
1454 snd_rawmidi_free(rmidi
);
1457 if ((err
= snd_device_new(card
, SNDRV_DEV_RAWMIDI
, rmidi
, &ops
)) < 0) {
1458 snd_rawmidi_free(rmidi
);
1466 static void snd_rawmidi_free_substreams(struct snd_rawmidi_str
*stream
)
1468 struct snd_rawmidi_substream
*substream
;
1470 while (!list_empty(&stream
->substreams
)) {
1471 substream
= list_entry(stream
->substreams
.next
, struct snd_rawmidi_substream
, list
);
1472 list_del(&substream
->list
);
1477 static int snd_rawmidi_free(struct snd_rawmidi
*rmidi
)
1482 snd_info_free_entry(rmidi
->proc_entry
);
1483 rmidi
->proc_entry
= NULL
;
1484 mutex_lock(®ister_mutex
);
1485 if (rmidi
->ops
&& rmidi
->ops
->dev_unregister
)
1486 rmidi
->ops
->dev_unregister(rmidi
);
1487 mutex_unlock(®ister_mutex
);
1489 snd_rawmidi_free_substreams(&rmidi
->streams
[SNDRV_RAWMIDI_STREAM_INPUT
]);
1490 snd_rawmidi_free_substreams(&rmidi
->streams
[SNDRV_RAWMIDI_STREAM_OUTPUT
]);
1491 if (rmidi
->private_free
)
1492 rmidi
->private_free(rmidi
);
1497 static int snd_rawmidi_dev_free(struct snd_device
*device
)
1499 struct snd_rawmidi
*rmidi
= device
->device_data
;
1500 return snd_rawmidi_free(rmidi
);
1503 #if defined(CONFIG_SND_SEQUENCER) || (defined(MODULE) && defined(CONFIG_SND_SEQUENCER_MODULE))
1504 static void snd_rawmidi_dev_seq_free(struct snd_seq_device
*device
)
1506 struct snd_rawmidi
*rmidi
= device
->private_data
;
1507 rmidi
->seq_dev
= NULL
;
1511 static int snd_rawmidi_dev_register(struct snd_device
*device
)
1514 struct snd_info_entry
*entry
;
1516 struct snd_rawmidi
*rmidi
= device
->device_data
;
1518 if (rmidi
->device
>= SNDRV_RAWMIDI_DEVICES
)
1520 mutex_lock(®ister_mutex
);
1521 if (snd_rawmidi_search(rmidi
->card
, rmidi
->device
)) {
1522 mutex_unlock(®ister_mutex
);
1525 list_add_tail(&rmidi
->list
, &snd_rawmidi_devices
);
1526 sprintf(name
, "midiC%iD%i", rmidi
->card
->number
, rmidi
->device
);
1527 if ((err
= snd_register_device(SNDRV_DEVICE_TYPE_RAWMIDI
,
1528 rmidi
->card
, rmidi
->device
,
1529 &snd_rawmidi_f_ops
, rmidi
, name
)) < 0) {
1530 snd_printk(KERN_ERR
"unable to register rawmidi device %i:%i\n", rmidi
->card
->number
, rmidi
->device
);
1531 list_del(&rmidi
->list
);
1532 mutex_unlock(®ister_mutex
);
1535 if (rmidi
->ops
&& rmidi
->ops
->dev_register
&&
1536 (err
= rmidi
->ops
->dev_register(rmidi
)) < 0) {
1537 snd_unregister_device(SNDRV_DEVICE_TYPE_RAWMIDI
, rmidi
->card
, rmidi
->device
);
1538 list_del(&rmidi
->list
);
1539 mutex_unlock(®ister_mutex
);
1542 #ifdef CONFIG_SND_OSSEMUL
1544 if ((int)rmidi
->device
== midi_map
[rmidi
->card
->number
]) {
1545 if (snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_MIDI
,
1546 rmidi
->card
, 0, &snd_rawmidi_f_ops
,
1548 snd_printk(KERN_ERR
"unable to register OSS rawmidi device %i:%i\n", rmidi
->card
->number
, 0);
1551 #ifdef SNDRV_OSS_INFO_DEV_MIDI
1552 snd_oss_info_register(SNDRV_OSS_INFO_DEV_MIDI
, rmidi
->card
->number
, rmidi
->name
);
1556 if ((int)rmidi
->device
== amidi_map
[rmidi
->card
->number
]) {
1557 if (snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_MIDI
,
1558 rmidi
->card
, 1, &snd_rawmidi_f_ops
,
1560 snd_printk(KERN_ERR
"unable to register OSS rawmidi device %i:%i\n", rmidi
->card
->number
, 1);
1565 #endif /* CONFIG_SND_OSSEMUL */
1566 mutex_unlock(®ister_mutex
);
1567 sprintf(name
, "midi%d", rmidi
->device
);
1568 entry
= snd_info_create_card_entry(rmidi
->card
, name
, rmidi
->card
->proc_root
);
1570 entry
->private_data
= rmidi
;
1571 entry
->c
.text
.read
= snd_rawmidi_proc_info_read
;
1572 if (snd_info_register(entry
) < 0) {
1573 snd_info_free_entry(entry
);
1577 rmidi
->proc_entry
= entry
;
1578 #if defined(CONFIG_SND_SEQUENCER) || (defined(MODULE) && defined(CONFIG_SND_SEQUENCER_MODULE))
1579 if (!rmidi
->ops
|| !rmidi
->ops
->dev_register
) { /* own registration mechanism */
1580 if (snd_seq_device_new(rmidi
->card
, rmidi
->device
, SNDRV_SEQ_DEV_ID_MIDISYNTH
, 0, &rmidi
->seq_dev
) >= 0) {
1581 rmidi
->seq_dev
->private_data
= rmidi
;
1582 rmidi
->seq_dev
->private_free
= snd_rawmidi_dev_seq_free
;
1583 sprintf(rmidi
->seq_dev
->name
, "MIDI %d-%d", rmidi
->card
->number
, rmidi
->device
);
1584 snd_device_register(rmidi
->card
, rmidi
->seq_dev
);
1591 static int snd_rawmidi_dev_disconnect(struct snd_device
*device
)
1593 struct snd_rawmidi
*rmidi
= device
->device_data
;
1595 mutex_lock(®ister_mutex
);
1596 list_del_init(&rmidi
->list
);
1597 #ifdef CONFIG_SND_OSSEMUL
1598 if (rmidi
->ossreg
) {
1599 if ((int)rmidi
->device
== midi_map
[rmidi
->card
->number
]) {
1600 snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_MIDI
, rmidi
->card
, 0);
1601 #ifdef SNDRV_OSS_INFO_DEV_MIDI
1602 snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_MIDI
, rmidi
->card
->number
);
1605 if ((int)rmidi
->device
== amidi_map
[rmidi
->card
->number
])
1606 snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_MIDI
, rmidi
->card
, 1);
1609 #endif /* CONFIG_SND_OSSEMUL */
1610 snd_unregister_device(SNDRV_DEVICE_TYPE_RAWMIDI
, rmidi
->card
, rmidi
->device
);
1611 mutex_unlock(®ister_mutex
);
1616 * snd_rawmidi_set_ops - set the rawmidi operators
1617 * @rmidi: the rawmidi instance
1618 * @stream: the stream direction, SNDRV_RAWMIDI_STREAM_XXX
1619 * @ops: the operator table
1621 * Sets the rawmidi operators for the given stream direction.
1623 void snd_rawmidi_set_ops(struct snd_rawmidi
*rmidi
, int stream
,
1624 struct snd_rawmidi_ops
*ops
)
1626 struct snd_rawmidi_substream
*substream
;
1628 list_for_each_entry(substream
, &rmidi
->streams
[stream
].substreams
, list
)
1629 substream
->ops
= ops
;
1636 static int __init
alsa_rawmidi_init(void)
1639 snd_ctl_register_ioctl(snd_rawmidi_control_ioctl
);
1640 snd_ctl_register_ioctl_compat(snd_rawmidi_control_ioctl
);
1641 #ifdef CONFIG_SND_OSSEMUL
1643 /* check device map table */
1644 for (i
= 0; i
< SNDRV_CARDS
; i
++) {
1645 if (midi_map
[i
] < 0 || midi_map
[i
] >= SNDRV_RAWMIDI_DEVICES
) {
1646 snd_printk(KERN_ERR
"invalid midi_map[%d] = %d\n", i
, midi_map
[i
]);
1649 if (amidi_map
[i
] < 0 || amidi_map
[i
] >= SNDRV_RAWMIDI_DEVICES
) {
1650 snd_printk(KERN_ERR
"invalid amidi_map[%d] = %d\n", i
, amidi_map
[i
]);
1655 #endif /* CONFIG_SND_OSSEMUL */
1659 static void __exit
alsa_rawmidi_exit(void)
1661 snd_ctl_unregister_ioctl(snd_rawmidi_control_ioctl
);
1662 snd_ctl_unregister_ioctl_compat(snd_rawmidi_control_ioctl
);
1665 module_init(alsa_rawmidi_init
)
1666 module_exit(alsa_rawmidi_exit
)
1668 EXPORT_SYMBOL(snd_rawmidi_output_params
);
1669 EXPORT_SYMBOL(snd_rawmidi_input_params
);
1670 EXPORT_SYMBOL(snd_rawmidi_drop_output
);
1671 EXPORT_SYMBOL(snd_rawmidi_drain_output
);
1672 EXPORT_SYMBOL(snd_rawmidi_drain_input
);
1673 EXPORT_SYMBOL(snd_rawmidi_receive
);
1674 EXPORT_SYMBOL(snd_rawmidi_transmit_empty
);
1675 EXPORT_SYMBOL(snd_rawmidi_transmit_peek
);
1676 EXPORT_SYMBOL(snd_rawmidi_transmit_ack
);
1677 EXPORT_SYMBOL(snd_rawmidi_transmit
);
1678 EXPORT_SYMBOL(snd_rawmidi_new
);
1679 EXPORT_SYMBOL(snd_rawmidi_set_ops
);
1680 EXPORT_SYMBOL(snd_rawmidi_info_select
);
1681 EXPORT_SYMBOL(snd_rawmidi_kernel_open
);
1682 EXPORT_SYMBOL(snd_rawmidi_kernel_release
);
1683 EXPORT_SYMBOL(snd_rawmidi_kernel_read
);
1684 EXPORT_SYMBOL(snd_rawmidi_kernel_write
);