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 down_read(&card->controls_rwsem);
422 list_for_each_entry(kctl, &card->ctl_files, list) {
423 if (kctl->pid == current->pid) {
424 subdevice = kctl->prefer_rawmidi_subdevice;
429 up_read(&card->controls_rwsem);
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 snd_assert(rfile != NULL, return -ENXIO);
474 snd_assert(rfile->input != NULL || rfile->output != NULL, return -ENXIO);
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 *buf, long count, int kernel)
917 long result = 0, count1;
918 struct snd_rawmidi_runtime *runtime = substream->runtime;
920 while (count > 0 && runtime->avail) {
921 count1 = runtime->buffer_size - runtime->appl_ptr;
924 spin_lock_irqsave(&runtime->lock, flags);
925 if (count1 > (int)runtime->avail)
926 count1 = runtime->avail;
928 memcpy(buf + result, runtime->buffer + runtime->appl_ptr, count1);
930 spin_unlock_irqrestore(&runtime->lock, flags);
931 if (copy_to_user((char __user *)buf + result,
932 runtime->buffer + runtime->appl_ptr, count1)) {
933 return result > 0 ? result : -EFAULT;
935 spin_lock_irqsave(&runtime->lock, flags);
937 runtime->appl_ptr += count1;
938 runtime->appl_ptr %= runtime->buffer_size;
939 runtime->avail -= count1;
940 spin_unlock_irqrestore(&runtime->lock, flags);
947 long snd_rawmidi_kernel_read(struct snd_rawmidi_substream *substream,
948 unsigned char *buf, long count)
950 snd_rawmidi_input_trigger(substream, 1);
951 return snd_rawmidi_kernel_read1(substream, buf, count, 1);
954 static ssize_t snd_rawmidi_read(struct file *file, char __user *buf, size_t count,
959 struct snd_rawmidi_file *rfile;
960 struct snd_rawmidi_substream *substream;
961 struct snd_rawmidi_runtime *runtime;
963 rfile = file->private_data;
964 substream = rfile->input;
965 if (substream == NULL)
967 runtime = substream->runtime;
968 snd_rawmidi_input_trigger(substream, 1);
971 spin_lock_irq(&runtime->lock);
972 while (!snd_rawmidi_ready(substream)) {
974 if ((file->f_flags & O_NONBLOCK) != 0 || result > 0) {
975 spin_unlock_irq(&runtime->lock);
976 return result > 0 ? result : -EAGAIN;
978 init_waitqueue_entry(&wait, current);
979 add_wait_queue(&runtime->sleep, &wait);
980 set_current_state(TASK_INTERRUPTIBLE);
981 spin_unlock_irq(&runtime->lock);
983 remove_wait_queue(&runtime->sleep, &wait);
984 if (signal_pending(current))
985 return result > 0 ? result : -ERESTARTSYS;
987 return result > 0 ? result : -EIO;
988 spin_lock_irq(&runtime->lock);
990 spin_unlock_irq(&runtime->lock);
991 count1 = snd_rawmidi_kernel_read1(substream,
992 (unsigned char __force *)buf,
995 return result > 0 ? result : count1;
1004 * snd_rawmidi_transmit_empty - check whether the output buffer is empty
1005 * @substream: the rawmidi substream
1007 * Returns 1 if the internal output buffer is empty, 0 if not.
1009 int snd_rawmidi_transmit_empty(struct snd_rawmidi_substream *substream)
1011 struct snd_rawmidi_runtime *runtime = substream->runtime;
1013 unsigned long flags;
1015 if (runtime->buffer == NULL) {
1016 snd_printd("snd_rawmidi_transmit_empty: output is not active!!!\n");
1019 spin_lock_irqsave(&runtime->lock, flags);
1020 result = runtime->avail >= runtime->buffer_size;
1021 spin_unlock_irqrestore(&runtime->lock, flags);
1026 * snd_rawmidi_transmit_peek - copy data from the internal buffer
1027 * @substream: the rawmidi substream
1028 * @buffer: the buffer pointer
1029 * @count: data size to transfer
1031 * Copies data from the internal output buffer to the given buffer.
1033 * Call this in the interrupt handler when the midi output is ready,
1034 * and call snd_rawmidi_transmit_ack() after the transmission is
1037 * Returns the size of copied data, or a negative error code on failure.
1039 int snd_rawmidi_transmit_peek(struct snd_rawmidi_substream *substream,
1040 unsigned char *buffer, int count)
1042 unsigned long flags;
1044 struct snd_rawmidi_runtime *runtime = substream->runtime;
1046 if (runtime->buffer == NULL) {
1047 snd_printd("snd_rawmidi_transmit_peek: output is not active!!!\n");
1051 spin_lock_irqsave(&runtime->lock, flags);
1052 if (runtime->avail >= runtime->buffer_size) {
1053 /* warning: lowlevel layer MUST trigger down the hardware */
1056 if (count == 1) { /* special case, faster code */
1057 *buffer = runtime->buffer[runtime->hw_ptr];
1060 count1 = runtime->buffer_size - runtime->hw_ptr;
1063 if (count1 > (int)(runtime->buffer_size - runtime->avail))
1064 count1 = runtime->buffer_size - runtime->avail;
1065 memcpy(buffer, runtime->buffer + runtime->hw_ptr, count1);
1069 if (count > (int)(runtime->buffer_size - runtime->avail - count1))
1070 count = runtime->buffer_size - runtime->avail - count1;
1071 memcpy(buffer + count1, runtime->buffer, count);
1076 spin_unlock_irqrestore(&runtime->lock, flags);
1081 * snd_rawmidi_transmit_ack - acknowledge the transmission
1082 * @substream: the rawmidi substream
1083 * @count: the tranferred count
1085 * Advances the hardware pointer for the internal output buffer with
1086 * the given size and updates the condition.
1087 * Call after the transmission is finished.
1089 * Returns the advanced size if successful, or a negative error code on failure.
1091 int snd_rawmidi_transmit_ack(struct snd_rawmidi_substream *substream, int count)
1093 unsigned long flags;
1094 struct snd_rawmidi_runtime *runtime = substream->runtime;
1096 if (runtime->buffer == NULL) {
1097 snd_printd("snd_rawmidi_transmit_ack: output is not active!!!\n");
1100 spin_lock_irqsave(&runtime->lock, flags);
1101 snd_assert(runtime->avail + count <= runtime->buffer_size, );
1102 runtime->hw_ptr += count;
1103 runtime->hw_ptr %= runtime->buffer_size;
1104 runtime->avail += count;
1105 substream->bytes += count;
1107 if (runtime->drain || snd_rawmidi_ready(substream))
1108 wake_up(&runtime->sleep);
1110 spin_unlock_irqrestore(&runtime->lock, flags);
1115 * snd_rawmidi_transmit - copy from the buffer to the device
1116 * @substream: the rawmidi substream
1117 * @buffer: the buffer pointer
1118 * @count: the data size to transfer
1120 * Copies data from the buffer to the device and advances the pointer.
1122 * Returns the copied size if successful, or a negative error code on failure.
1124 int snd_rawmidi_transmit(struct snd_rawmidi_substream *substream,
1125 unsigned char *buffer, int count)
1127 count = snd_rawmidi_transmit_peek(substream, buffer, count);
1130 return snd_rawmidi_transmit_ack(substream, count);
1133 static long snd_rawmidi_kernel_write1(struct snd_rawmidi_substream *substream,
1134 const unsigned char *buf, long count, int kernel)
1136 unsigned long flags;
1137 long count1, result;
1138 struct snd_rawmidi_runtime *runtime = substream->runtime;
1140 snd_assert(buf != NULL, return -EINVAL);
1141 snd_assert(runtime->buffer != NULL, return -EINVAL);
1144 spin_lock_irqsave(&runtime->lock, flags);
1145 if (substream->append) {
1146 if ((long)runtime->avail < count) {
1147 spin_unlock_irqrestore(&runtime->lock, flags);
1151 while (count > 0 && runtime->avail > 0) {
1152 count1 = runtime->buffer_size - runtime->appl_ptr;
1155 if (count1 > (long)runtime->avail)
1156 count1 = runtime->avail;
1158 memcpy(runtime->buffer + runtime->appl_ptr, buf, count1);
1160 spin_unlock_irqrestore(&runtime->lock, flags);
1161 if (copy_from_user(runtime->buffer + runtime->appl_ptr,
1162 (char __user *)buf, count1)) {
1163 spin_lock_irqsave(&runtime->lock, flags);
1164 result = result > 0 ? result : -EFAULT;
1167 spin_lock_irqsave(&runtime->lock, flags);
1169 runtime->appl_ptr += count1;
1170 runtime->appl_ptr %= runtime->buffer_size;
1171 runtime->avail -= count1;
1177 count1 = runtime->avail < runtime->buffer_size;
1178 spin_unlock_irqrestore(&runtime->lock, flags);
1180 snd_rawmidi_output_trigger(substream, 1);
1184 long snd_rawmidi_kernel_write(struct snd_rawmidi_substream *substream,
1185 const unsigned char *buf, long count)
1187 return snd_rawmidi_kernel_write1(substream, buf, count, 1);
1190 static ssize_t snd_rawmidi_write(struct file *file, const char __user *buf,
1191 size_t count, loff_t *offset)
1193 long result, timeout;
1195 struct snd_rawmidi_file *rfile;
1196 struct snd_rawmidi_runtime *runtime;
1197 struct snd_rawmidi_substream *substream;
1199 rfile = file->private_data;
1200 substream = rfile->output;
1201 runtime = substream->runtime;
1202 /* we cannot put an atomic message to our buffer */
1203 if (substream->append && count > runtime->buffer_size)
1207 spin_lock_irq(&runtime->lock);
1208 while (!snd_rawmidi_ready_append(substream, count)) {
1210 if (file->f_flags & O_NONBLOCK) {
1211 spin_unlock_irq(&runtime->lock);
1212 return result > 0 ? result : -EAGAIN;
1214 init_waitqueue_entry(&wait, current);
1215 add_wait_queue(&runtime->sleep, &wait);
1216 set_current_state(TASK_INTERRUPTIBLE);
1217 spin_unlock_irq(&runtime->lock);
1218 timeout = schedule_timeout(30 * HZ);
1219 remove_wait_queue(&runtime->sleep, &wait);
1220 if (signal_pending(current))
1221 return result > 0 ? result : -ERESTARTSYS;
1222 if (!runtime->avail && !timeout)
1223 return result > 0 ? result : -EIO;
1224 spin_lock_irq(&runtime->lock);
1226 spin_unlock_irq(&runtime->lock);
1227 count1 = snd_rawmidi_kernel_write1(substream,
1228 (unsigned char __force *)buf,
1231 return result > 0 ? result : count1;
1234 if ((size_t)count1 < count && (file->f_flags & O_NONBLOCK))
1238 if (file->f_flags & O_SYNC) {
1239 spin_lock_irq(&runtime->lock);
1240 while (runtime->avail != runtime->buffer_size) {
1242 unsigned int last_avail = runtime->avail;
1243 init_waitqueue_entry(&wait, current);
1244 add_wait_queue(&runtime->sleep, &wait);
1245 set_current_state(TASK_INTERRUPTIBLE);
1246 spin_unlock_irq(&runtime->lock);
1247 timeout = schedule_timeout(30 * HZ);
1248 remove_wait_queue(&runtime->sleep, &wait);
1249 if (signal_pending(current))
1250 return result > 0 ? result : -ERESTARTSYS;
1251 if (runtime->avail == last_avail && !timeout)
1252 return result > 0 ? result : -EIO;
1253 spin_lock_irq(&runtime->lock);
1255 spin_unlock_irq(&runtime->lock);
1260 static unsigned int snd_rawmidi_poll(struct file *file, poll_table * wait)
1262 struct snd_rawmidi_file *rfile;
1263 struct snd_rawmidi_runtime *runtime;
1266 rfile = file->private_data;
1267 if (rfile->input != NULL) {
1268 runtime = rfile->input->runtime;
1269 snd_rawmidi_input_trigger(rfile->input, 1);
1270 poll_wait(file, &runtime->sleep, wait);
1272 if (rfile->output != NULL) {
1273 runtime = rfile->output->runtime;
1274 poll_wait(file, &runtime->sleep, wait);
1277 if (rfile->input != NULL) {
1278 if (snd_rawmidi_ready(rfile->input))
1279 mask |= POLLIN | POLLRDNORM;
1281 if (rfile->output != NULL) {
1282 if (snd_rawmidi_ready(rfile->output))
1283 mask |= POLLOUT | POLLWRNORM;
1290 #ifdef CONFIG_COMPAT
1291 #include "rawmidi_compat.c"
1293 #define snd_rawmidi_ioctl_compat NULL
1300 static void snd_rawmidi_proc_info_read(struct snd_info_entry *entry,
1301 struct snd_info_buffer *buffer)
1303 struct snd_rawmidi *rmidi;
1304 struct snd_rawmidi_substream *substream;
1305 struct snd_rawmidi_runtime *runtime;
1307 rmidi = entry->private_data;
1308 snd_iprintf(buffer, "%s\n\n", rmidi->name);
1309 mutex_lock(&rmidi->open_mutex);
1310 if (rmidi->info_flags & SNDRV_RAWMIDI_INFO_OUTPUT) {
1311 list_for_each_entry(substream,
1312 &rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substreams,
1316 " Tx bytes : %lu\n",
1318 (unsigned long) substream->bytes);
1319 if (substream->opened) {
1320 runtime = substream->runtime;
1323 " Buffer size : %lu\n"
1325 runtime->oss ? "OSS compatible" : "native",
1326 (unsigned long) runtime->buffer_size,
1327 (unsigned long) runtime->avail);
1331 if (rmidi->info_flags & SNDRV_RAWMIDI_INFO_INPUT) {
1332 list_for_each_entry(substream,
1333 &rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substreams,
1337 " Rx bytes : %lu\n",
1339 (unsigned long) substream->bytes);
1340 if (substream->opened) {
1341 runtime = substream->runtime;
1343 " Buffer size : %lu\n"
1345 " Overruns : %lu\n",
1346 (unsigned long) runtime->buffer_size,
1347 (unsigned long) runtime->avail,
1348 (unsigned long) runtime->xruns);
1352 mutex_unlock(&rmidi->open_mutex);
1356 * Register functions
1359 static const struct file_operations snd_rawmidi_f_ops =
1361 .owner = THIS_MODULE,
1362 .read = snd_rawmidi_read,
1363 .write = snd_rawmidi_write,
1364 .open = snd_rawmidi_open,
1365 .release = snd_rawmidi_release,
1366 .poll = snd_rawmidi_poll,
1367 .unlocked_ioctl = snd_rawmidi_ioctl,
1368 .compat_ioctl = snd_rawmidi_ioctl_compat,
1371 static int snd_rawmidi_alloc_substreams(struct snd_rawmidi *rmidi,
1372 struct snd_rawmidi_str *stream,
1376 struct snd_rawmidi_substream *substream;
1379 for (idx = 0; idx < count; idx++) {
1380 substream = kzalloc(sizeof(*substream), GFP_KERNEL);
1381 if (substream == NULL) {
1382 snd_printk(KERN_ERR "rawmidi: cannot allocate substream\n");
1385 substream->stream = direction;
1386 substream->number = idx;
1387 substream->rmidi = rmidi;
1388 substream->pstr = stream;
1389 list_add_tail(&substream->list, &stream->substreams);
1390 stream->substream_count++;
1396 * snd_rawmidi_new - create a rawmidi instance
1397 * @card: the card instance
1398 * @id: the id string
1399 * @device: the device index
1400 * @output_count: the number of output streams
1401 * @input_count: the number of input streams
1402 * @rrawmidi: the pointer to store the new rawmidi instance
1404 * Creates a new rawmidi instance.
1405 * Use snd_rawmidi_set_ops() to set the operators to the new instance.
1407 * Returns zero if successful, or a negative error code on failure.
1409 int snd_rawmidi_new(struct snd_card *card, char *id, int device,
1410 int output_count, int input_count,
1411 struct snd_rawmidi ** rrawmidi)
1413 struct snd_rawmidi *rmidi;
1415 static struct snd_device_ops ops = {
1416 .dev_free = snd_rawmidi_dev_free,
1417 .dev_register = snd_rawmidi_dev_register,
1418 .dev_disconnect = snd_rawmidi_dev_disconnect,
1421 snd_assert(rrawmidi != NULL, return -EINVAL);
1423 snd_assert(card != NULL, return -ENXIO);
1424 rmidi = kzalloc(sizeof(*rmidi), GFP_KERNEL);
1425 if (rmidi == NULL) {
1426 snd_printk(KERN_ERR "rawmidi: cannot allocate\n");
1430 rmidi->device = device;
1431 mutex_init(&rmidi->open_mutex);
1432 init_waitqueue_head(&rmidi->open_wait);
1433 INIT_LIST_HEAD(&rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substreams);
1434 INIT_LIST_HEAD(&rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substreams);
1437 strlcpy(rmidi->id, id, sizeof(rmidi->id));
1438 if ((err = snd_rawmidi_alloc_substreams(rmidi,
1439 &rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT],
1440 SNDRV_RAWMIDI_STREAM_INPUT,
1441 input_count)) < 0) {
1442 snd_rawmidi_free(rmidi);
1445 if ((err = snd_rawmidi_alloc_substreams(rmidi,
1446 &rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT],
1447 SNDRV_RAWMIDI_STREAM_OUTPUT,
1448 output_count)) < 0) {
1449 snd_rawmidi_free(rmidi);
1452 if ((err = snd_device_new(card, SNDRV_DEV_RAWMIDI, rmidi, &ops)) < 0) {
1453 snd_rawmidi_free(rmidi);
1460 static void snd_rawmidi_free_substreams(struct snd_rawmidi_str *stream)
1462 struct snd_rawmidi_substream *substream;
1464 while (!list_empty(&stream->substreams)) {
1465 substream = list_entry(stream->substreams.next, struct snd_rawmidi_substream, list);
1466 list_del(&substream->list);
1471 static int snd_rawmidi_free(struct snd_rawmidi *rmidi)
1473 snd_assert(rmidi != NULL, return -ENXIO);
1475 snd_info_free_entry(rmidi->proc_entry);
1476 rmidi->proc_entry = NULL;
1477 mutex_lock(®ister_mutex);
1478 if (rmidi->ops && rmidi->ops->dev_unregister)
1479 rmidi->ops->dev_unregister(rmidi);
1480 mutex_unlock(®ister_mutex);
1482 snd_rawmidi_free_substreams(&rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT]);
1483 snd_rawmidi_free_substreams(&rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT]);
1484 if (rmidi->private_free)
1485 rmidi->private_free(rmidi);
1490 static int snd_rawmidi_dev_free(struct snd_device *device)
1492 struct snd_rawmidi *rmidi = device->device_data;
1493 return snd_rawmidi_free(rmidi);
1496 #if defined(CONFIG_SND_SEQUENCER) || (defined(MODULE) && defined(CONFIG_SND_SEQUENCER_MODULE))
1497 static void snd_rawmidi_dev_seq_free(struct snd_seq_device *device)
1499 struct snd_rawmidi *rmidi = device->private_data;
1500 rmidi->seq_dev = NULL;
1504 static int snd_rawmidi_dev_register(struct snd_device *device)
1507 struct snd_info_entry *entry;
1509 struct snd_rawmidi *rmidi = device->device_data;
1511 if (rmidi->device >= SNDRV_RAWMIDI_DEVICES)
1513 mutex_lock(®ister_mutex);
1514 if (snd_rawmidi_search(rmidi->card, rmidi->device)) {
1515 mutex_unlock(®ister_mutex);
1518 list_add_tail(&rmidi->list, &snd_rawmidi_devices);
1519 sprintf(name, "midiC%iD%i", rmidi->card->number, rmidi->device);
1520 if ((err = snd_register_device(SNDRV_DEVICE_TYPE_RAWMIDI,
1521 rmidi->card, rmidi->device,
1522 &snd_rawmidi_f_ops, rmidi, name)) < 0) {
1523 snd_printk(KERN_ERR "unable to register rawmidi device %i:%i\n", rmidi->card->number, rmidi->device);
1524 list_del(&rmidi->list);
1525 mutex_unlock(®ister_mutex);
1528 if (rmidi->ops && rmidi->ops->dev_register &&
1529 (err = rmidi->ops->dev_register(rmidi)) < 0) {
1530 snd_unregister_device(SNDRV_DEVICE_TYPE_RAWMIDI, rmidi->card, rmidi->device);
1531 list_del(&rmidi->list);
1532 mutex_unlock(®ister_mutex);
1535 #ifdef CONFIG_SND_OSSEMUL
1537 if ((int)rmidi->device == midi_map[rmidi->card->number]) {
1538 if (snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_MIDI,
1539 rmidi->card, 0, &snd_rawmidi_f_ops,
1541 snd_printk(KERN_ERR "unable to register OSS rawmidi device %i:%i\n", rmidi->card->number, 0);
1544 #ifdef SNDRV_OSS_INFO_DEV_MIDI
1545 snd_oss_info_register(SNDRV_OSS_INFO_DEV_MIDI, rmidi->card->number, rmidi->name);
1549 if ((int)rmidi->device == amidi_map[rmidi->card->number]) {
1550 if (snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_MIDI,
1551 rmidi->card, 1, &snd_rawmidi_f_ops,
1553 snd_printk(KERN_ERR "unable to register OSS rawmidi device %i:%i\n", rmidi->card->number, 1);
1558 #endif /* CONFIG_SND_OSSEMUL */
1559 mutex_unlock(®ister_mutex);
1560 sprintf(name, "midi%d", rmidi->device);
1561 entry = snd_info_create_card_entry(rmidi->card, name, rmidi->card->proc_root);
1563 entry->private_data = rmidi;
1564 entry->c.text.read = snd_rawmidi_proc_info_read;
1565 if (snd_info_register(entry) < 0) {
1566 snd_info_free_entry(entry);
1570 rmidi->proc_entry = entry;
1571 #if defined(CONFIG_SND_SEQUENCER) || (defined(MODULE) && defined(CONFIG_SND_SEQUENCER_MODULE))
1572 if (!rmidi->ops || !rmidi->ops->dev_register) { /* own registration mechanism */
1573 if (snd_seq_device_new(rmidi->card, rmidi->device, SNDRV_SEQ_DEV_ID_MIDISYNTH, 0, &rmidi->seq_dev) >= 0) {
1574 rmidi->seq_dev->private_data = rmidi;
1575 rmidi->seq_dev->private_free = snd_rawmidi_dev_seq_free;
1576 sprintf(rmidi->seq_dev->name, "MIDI %d-%d", rmidi->card->number, rmidi->device);
1577 snd_device_register(rmidi->card, rmidi->seq_dev);
1584 static int snd_rawmidi_dev_disconnect(struct snd_device *device)
1586 struct snd_rawmidi *rmidi = device->device_data;
1588 mutex_lock(®ister_mutex);
1589 list_del_init(&rmidi->list);
1590 #ifdef CONFIG_SND_OSSEMUL
1591 if (rmidi->ossreg) {
1592 if ((int)rmidi->device == midi_map[rmidi->card->number]) {
1593 snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_MIDI, rmidi->card, 0);
1594 #ifdef SNDRV_OSS_INFO_DEV_MIDI
1595 snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_MIDI, rmidi->card->number);
1598 if ((int)rmidi->device == amidi_map[rmidi->card->number])
1599 snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_MIDI, rmidi->card, 1);
1602 #endif /* CONFIG_SND_OSSEMUL */
1603 snd_unregister_device(SNDRV_DEVICE_TYPE_RAWMIDI, rmidi->card, rmidi->device);
1604 mutex_unlock(®ister_mutex);
1609 * snd_rawmidi_set_ops - set the rawmidi operators
1610 * @rmidi: the rawmidi instance
1611 * @stream: the stream direction, SNDRV_RAWMIDI_STREAM_XXX
1612 * @ops: the operator table
1614 * Sets the rawmidi operators for the given stream direction.
1616 void snd_rawmidi_set_ops(struct snd_rawmidi *rmidi, int stream,
1617 struct snd_rawmidi_ops *ops)
1619 struct snd_rawmidi_substream *substream;
1621 list_for_each_entry(substream, &rmidi->streams[stream].substreams, list)
1622 substream->ops = ops;
1629 static int __init alsa_rawmidi_init(void)
1632 snd_ctl_register_ioctl(snd_rawmidi_control_ioctl);
1633 snd_ctl_register_ioctl_compat(snd_rawmidi_control_ioctl);
1634 #ifdef CONFIG_SND_OSSEMUL
1636 /* check device map table */
1637 for (i = 0; i < SNDRV_CARDS; i++) {
1638 if (midi_map[i] < 0 || midi_map[i] >= SNDRV_RAWMIDI_DEVICES) {
1639 snd_printk(KERN_ERR "invalid midi_map[%d] = %d\n", i, midi_map[i]);
1642 if (amidi_map[i] < 0 || amidi_map[i] >= SNDRV_RAWMIDI_DEVICES) {
1643 snd_printk(KERN_ERR "invalid amidi_map[%d] = %d\n", i, amidi_map[i]);
1648 #endif /* CONFIG_SND_OSSEMUL */
1652 static void __exit alsa_rawmidi_exit(void)
1654 snd_ctl_unregister_ioctl(snd_rawmidi_control_ioctl);
1655 snd_ctl_unregister_ioctl_compat(snd_rawmidi_control_ioctl);
1658 module_init(alsa_rawmidi_init)
1659 module_exit(alsa_rawmidi_exit)
1661 EXPORT_SYMBOL(snd_rawmidi_output_params);
1662 EXPORT_SYMBOL(snd_rawmidi_input_params);
1663 EXPORT_SYMBOL(snd_rawmidi_drop_output);
1664 EXPORT_SYMBOL(snd_rawmidi_drain_output);
1665 EXPORT_SYMBOL(snd_rawmidi_drain_input);
1666 EXPORT_SYMBOL(snd_rawmidi_receive);
1667 EXPORT_SYMBOL(snd_rawmidi_transmit_empty);
1668 EXPORT_SYMBOL(snd_rawmidi_transmit_peek);
1669 EXPORT_SYMBOL(snd_rawmidi_transmit_ack);
1670 EXPORT_SYMBOL(snd_rawmidi_transmit);
1671 EXPORT_SYMBOL(snd_rawmidi_new);
1672 EXPORT_SYMBOL(snd_rawmidi_set_ops);
1673 EXPORT_SYMBOL(snd_rawmidi_info_select);
1674 EXPORT_SYMBOL(snd_rawmidi_kernel_open);
1675 EXPORT_SYMBOL(snd_rawmidi_kernel_release);
1676 EXPORT_SYMBOL(snd_rawmidi_kernel_read);
1677 EXPORT_SYMBOL(snd_rawmidi_kernel_write);