2 * Abstract layer for MIDI v1.0 stream
3 * Copyright (c) by Jaroslav Kysela <perex@suse.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/driver.h>
23 #include <sound/core.h>
24 #include <linux/major.h>
25 #include <linux/init.h>
26 #include <linux/smp_lock.h>
27 #include <linux/sched.h>
28 #include <linux/slab.h>
29 #include <linux/time.h>
30 #include <linux/wait.h>
31 #include <linux/moduleparam.h>
32 #include <linux/delay.h>
33 #include <linux/wait.h>
34 #include <sound/rawmidi.h>
35 #include <sound/info.h>
36 #include <sound/control.h>
37 #include <sound/minors.h>
38 #include <sound/initval.h>
40 MODULE_AUTHOR("Jaroslav Kysela <perex@suse.cz>");
41 MODULE_DESCRIPTION("Midlevel RawMidi code for ALSA.");
42 MODULE_LICENSE("GPL");
44 #ifdef CONFIG_SND_OSSEMUL
45 static int midi_map[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS-1)] = 0};
46 static int amidi_map[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS-1)] = 1};
47 module_param_array(midi_map, int, NULL, 0444);
48 MODULE_PARM_DESC(midi_map, "Raw MIDI device number assigned to 1st OSS device.");
49 module_param_array(amidi_map, int, NULL, 0444);
50 MODULE_PARM_DESC(amidi_map, "Raw MIDI device number assigned to 2nd OSS device.");
51 #endif /* CONFIG_SND_OSSEMUL */
53 static int snd_rawmidi_free(struct snd_rawmidi *rawmidi);
54 static int snd_rawmidi_dev_free(struct snd_device *device);
55 static int snd_rawmidi_dev_register(struct snd_device *device);
56 static int snd_rawmidi_dev_disconnect(struct snd_device *device);
57 static int snd_rawmidi_dev_unregister(struct snd_device *device);
59 static struct snd_rawmidi *snd_rawmidi_devices[SNDRV_CARDS * SNDRV_RAWMIDI_DEVICES];
61 static DECLARE_MUTEX(register_mutex);
63 static inline unsigned short snd_rawmidi_file_flags(struct file *file)
65 switch (file->f_mode & (FMODE_READ | FMODE_WRITE)) {
67 return SNDRV_RAWMIDI_LFLG_OUTPUT;
69 return SNDRV_RAWMIDI_LFLG_INPUT;
71 return SNDRV_RAWMIDI_LFLG_OPEN;
75 static inline int snd_rawmidi_ready(struct snd_rawmidi_substream *substream)
77 struct snd_rawmidi_runtime *runtime = substream->runtime;
78 return runtime->avail >= runtime->avail_min;
81 static inline int snd_rawmidi_ready_append(struct snd_rawmidi_substream *substream,
84 struct snd_rawmidi_runtime *runtime = substream->runtime;
85 return runtime->avail >= runtime->avail_min &&
86 (!substream->append || runtime->avail >= count);
89 static void snd_rawmidi_input_event_tasklet(unsigned long data)
91 struct snd_rawmidi_substream *substream = (struct snd_rawmidi_substream *)data;
92 substream->runtime->event(substream);
95 static void snd_rawmidi_output_trigger_tasklet(unsigned long data)
97 struct snd_rawmidi_substream *substream = (struct snd_rawmidi_substream *)data;
98 substream->ops->trigger(substream, 1);
101 static int snd_rawmidi_runtime_create(struct snd_rawmidi_substream *substream)
103 struct snd_rawmidi_runtime *runtime;
105 if ((runtime = kzalloc(sizeof(*runtime), GFP_KERNEL)) == NULL)
107 spin_lock_init(&runtime->lock);
108 init_waitqueue_head(&runtime->sleep);
109 if (substream->stream == SNDRV_RAWMIDI_STREAM_INPUT)
110 tasklet_init(&runtime->tasklet,
111 snd_rawmidi_input_event_tasklet,
112 (unsigned long)substream);
114 tasklet_init(&runtime->tasklet,
115 snd_rawmidi_output_trigger_tasklet,
116 (unsigned long)substream);
117 runtime->event = NULL;
118 runtime->buffer_size = PAGE_SIZE;
119 runtime->avail_min = 1;
120 if (substream->stream == SNDRV_RAWMIDI_STREAM_INPUT)
123 runtime->avail = runtime->buffer_size;
124 if ((runtime->buffer = kmalloc(runtime->buffer_size, GFP_KERNEL)) == NULL) {
128 runtime->appl_ptr = runtime->hw_ptr = 0;
129 substream->runtime = runtime;
133 static int snd_rawmidi_runtime_free(struct snd_rawmidi_substream *substream)
135 struct snd_rawmidi_runtime *runtime = substream->runtime;
137 kfree(runtime->buffer);
139 substream->runtime = NULL;
143 static inline void snd_rawmidi_output_trigger(struct snd_rawmidi_substream *substream,int up)
146 tasklet_hi_schedule(&substream->runtime->tasklet);
148 tasklet_kill(&substream->runtime->tasklet);
149 substream->ops->trigger(substream, 0);
153 static void snd_rawmidi_input_trigger(struct snd_rawmidi_substream *substream, int up)
155 substream->ops->trigger(substream, up);
156 if (!up && substream->runtime->event)
157 tasklet_kill(&substream->runtime->tasklet);
160 int snd_rawmidi_drop_output(struct snd_rawmidi_substream *substream)
163 struct snd_rawmidi_runtime *runtime = substream->runtime;
165 snd_rawmidi_output_trigger(substream, 0);
167 spin_lock_irqsave(&runtime->lock, flags);
168 runtime->appl_ptr = runtime->hw_ptr = 0;
169 runtime->avail = runtime->buffer_size;
170 spin_unlock_irqrestore(&runtime->lock, flags);
174 int snd_rawmidi_drain_output(struct snd_rawmidi_substream *substream)
178 struct snd_rawmidi_runtime *runtime = substream->runtime;
182 timeout = wait_event_interruptible_timeout(runtime->sleep,
183 (runtime->avail >= runtime->buffer_size),
185 if (signal_pending(current))
187 if (runtime->avail < runtime->buffer_size && !timeout) {
188 snd_printk(KERN_WARNING "rawmidi drain error (avail = %li, buffer_size = %li)\n", (long)runtime->avail, (long)runtime->buffer_size);
192 if (err != -ERESTARTSYS) {
193 /* we need wait a while to make sure that Tx FIFOs are empty */
194 if (substream->ops->drain)
195 substream->ops->drain(substream);
198 snd_rawmidi_drop_output(substream);
203 int snd_rawmidi_drain_input(struct snd_rawmidi_substream *substream)
206 struct snd_rawmidi_runtime *runtime = substream->runtime;
208 snd_rawmidi_input_trigger(substream, 0);
210 spin_lock_irqsave(&runtime->lock, flags);
211 runtime->appl_ptr = runtime->hw_ptr = 0;
213 spin_unlock_irqrestore(&runtime->lock, flags);
217 int snd_rawmidi_kernel_open(int cardnum, int device, int subdevice,
218 int mode, struct snd_rawmidi_file * rfile)
220 struct snd_rawmidi *rmidi;
221 struct list_head *list1, *list2;
222 struct snd_rawmidi_substream *sinput = NULL, *soutput = NULL;
223 struct snd_rawmidi_runtime *input = NULL, *output = NULL;
227 rfile->input = rfile->output = NULL;
228 rmidi = snd_rawmidi_devices[(cardnum * SNDRV_RAWMIDI_DEVICES) + device];
233 if (!try_module_get(rmidi->card->module)) {
237 if (!(mode & SNDRV_RAWMIDI_LFLG_NOOPENLOCK))
238 down(&rmidi->open_mutex);
239 if (mode & SNDRV_RAWMIDI_LFLG_INPUT) {
240 if (!(rmidi->info_flags & SNDRV_RAWMIDI_INFO_INPUT)) {
244 if (subdevice >= 0 && (unsigned int)subdevice >= rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substream_count) {
248 if (rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substream_opened >=
249 rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substream_count) {
254 if (mode & SNDRV_RAWMIDI_LFLG_OUTPUT) {
255 if (!(rmidi->info_flags & SNDRV_RAWMIDI_INFO_OUTPUT)) {
259 if (subdevice >= 0 && (unsigned int)subdevice >= rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substream_count) {
263 if (rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substream_opened >=
264 rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substream_count) {
269 list1 = rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substreams.next;
271 if (list1 == &rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substreams) {
273 if (mode & SNDRV_RAWMIDI_LFLG_INPUT) {
279 sinput = list_entry(list1, struct snd_rawmidi_substream, list);
280 if ((mode & SNDRV_RAWMIDI_LFLG_INPUT) && sinput->opened)
282 if (subdevice < 0 || (subdevice >= 0 && subdevice == sinput->number))
287 list2 = rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substreams.next;
289 if (list2 == &rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substreams) {
291 if (mode & SNDRV_RAWMIDI_LFLG_OUTPUT) {
297 soutput = list_entry(list2, struct snd_rawmidi_substream, list);
298 if (mode & SNDRV_RAWMIDI_LFLG_OUTPUT) {
299 if (mode & SNDRV_RAWMIDI_LFLG_APPEND) {
300 if (soutput->opened && !soutput->append)
307 if (subdevice < 0 || (subdevice >= 0 && subdevice == soutput->number))
312 if (mode & SNDRV_RAWMIDI_LFLG_INPUT) {
313 if ((err = snd_rawmidi_runtime_create(sinput)) < 0)
315 input = sinput->runtime;
316 if ((err = sinput->ops->open(sinput)) < 0)
319 rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substream_opened++;
323 if (mode & SNDRV_RAWMIDI_LFLG_OUTPUT) {
326 if ((err = snd_rawmidi_runtime_create(soutput)) < 0) {
327 if (mode & SNDRV_RAWMIDI_LFLG_INPUT)
328 sinput->ops->close(sinput);
331 output = soutput->runtime;
332 if ((err = soutput->ops->open(soutput)) < 0) {
333 if (mode & SNDRV_RAWMIDI_LFLG_INPUT)
334 sinput->ops->close(sinput);
339 if (mode & SNDRV_RAWMIDI_LFLG_APPEND)
341 if (soutput->use_count++ == 0)
342 soutput->active_sensing = 1;
343 rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substream_opened++;
347 if (!(mode & SNDRV_RAWMIDI_LFLG_NOOPENLOCK))
348 up(&rmidi->open_mutex);
350 rfile->rmidi = rmidi;
351 rfile->input = sinput;
352 rfile->output = soutput;
358 snd_rawmidi_runtime_free(sinput);
360 snd_rawmidi_runtime_free(soutput);
361 module_put(rmidi->card->module);
362 if (!(mode & SNDRV_RAWMIDI_LFLG_NOOPENLOCK))
363 up(&rmidi->open_mutex);
368 static int snd_rawmidi_open(struct inode *inode, struct file *file)
370 int maj = imajor(inode);
372 struct snd_card *card;
373 int device, subdevice;
374 unsigned short fflags;
376 struct snd_rawmidi *rmidi;
377 struct snd_rawmidi_file *rawmidi_file;
379 struct list_head *list;
380 struct snd_ctl_file *kctl;
382 if (maj == snd_major) {
383 cardnum = SNDRV_MINOR_CARD(iminor(inode));
384 cardnum %= SNDRV_CARDS;
385 device = SNDRV_MINOR_DEVICE(iminor(inode)) - SNDRV_MINOR_RAWMIDI;
386 device %= SNDRV_MINOR_RAWMIDIS;
387 #ifdef CONFIG_SND_OSSEMUL
388 } else if (maj == SOUND_MAJOR) {
389 cardnum = SNDRV_MINOR_OSS_CARD(iminor(inode));
390 cardnum %= SNDRV_CARDS;
391 device = SNDRV_MINOR_OSS_DEVICE(iminor(inode)) == SNDRV_MINOR_OSS_MIDI ?
392 midi_map[cardnum] : amidi_map[cardnum];
397 rmidi = snd_rawmidi_devices[(cardnum * SNDRV_RAWMIDI_DEVICES) + device];
400 #ifdef CONFIG_SND_OSSEMUL
401 if (maj == SOUND_MAJOR && !rmidi->ossreg)
404 if ((file->f_flags & O_APPEND) && !(file->f_flags & O_NONBLOCK))
405 return -EINVAL; /* invalid combination */
407 err = snd_card_file_add(card, file);
410 fflags = snd_rawmidi_file_flags(file);
411 if ((file->f_flags & O_APPEND) || maj == SOUND_MAJOR) /* OSS emul? */
412 fflags |= SNDRV_RAWMIDI_LFLG_APPEND;
413 fflags |= SNDRV_RAWMIDI_LFLG_NOOPENLOCK;
414 rawmidi_file = kmalloc(sizeof(*rawmidi_file), GFP_KERNEL);
415 if (rawmidi_file == NULL) {
416 snd_card_file_remove(card, file);
419 init_waitqueue_entry(&wait, current);
420 add_wait_queue(&rmidi->open_wait, &wait);
421 down(&rmidi->open_mutex);
424 down_read(&card->controls_rwsem);
425 list_for_each(list, &card->ctl_files) {
426 kctl = snd_ctl_file(list);
427 if (kctl->pid == current->pid) {
428 subdevice = kctl->prefer_rawmidi_subdevice;
432 up_read(&card->controls_rwsem);
433 err = snd_rawmidi_kernel_open(cardnum, device, subdevice, fflags, rawmidi_file);
436 if (err == -EAGAIN) {
437 if (file->f_flags & O_NONBLOCK) {
443 set_current_state(TASK_INTERRUPTIBLE);
444 up(&rmidi->open_mutex);
446 down(&rmidi->open_mutex);
447 if (signal_pending(current)) {
452 #ifdef CONFIG_SND_OSSEMUL
453 if (rawmidi_file->input && rawmidi_file->input->runtime)
454 rawmidi_file->input->runtime->oss = (maj == SOUND_MAJOR);
455 if (rawmidi_file->output && rawmidi_file->output->runtime)
456 rawmidi_file->output->runtime->oss = (maj == SOUND_MAJOR);
458 remove_wait_queue(&rmidi->open_wait, &wait);
460 file->private_data = rawmidi_file;
462 snd_card_file_remove(card, file);
465 up(&rmidi->open_mutex);
469 int snd_rawmidi_kernel_release(struct snd_rawmidi_file * rfile)
471 struct snd_rawmidi *rmidi;
472 struct snd_rawmidi_substream *substream;
473 struct snd_rawmidi_runtime *runtime;
475 snd_assert(rfile != NULL, return -ENXIO);
476 snd_assert(rfile->input != NULL || rfile->output != NULL, return -ENXIO);
477 rmidi = rfile->rmidi;
478 down(&rmidi->open_mutex);
479 if (rfile->input != NULL) {
480 substream = rfile->input;
482 runtime = substream->runtime;
483 snd_rawmidi_input_trigger(substream, 0);
484 substream->ops->close(substream);
485 if (runtime->private_free != NULL)
486 runtime->private_free(substream);
487 snd_rawmidi_runtime_free(substream);
488 substream->opened = 0;
489 rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substream_opened--;
491 if (rfile->output != NULL) {
492 substream = rfile->output;
493 rfile->output = NULL;
494 if (--substream->use_count == 0) {
495 runtime = substream->runtime;
496 if (substream->active_sensing) {
497 unsigned char buf = 0xfe;
498 /* sending single active sensing message to shut the device up */
499 snd_rawmidi_kernel_write(substream, &buf, 1);
501 if (snd_rawmidi_drain_output(substream) == -ERESTARTSYS)
502 snd_rawmidi_output_trigger(substream, 0);
503 substream->ops->close(substream);
504 if (runtime->private_free != NULL)
505 runtime->private_free(substream);
506 snd_rawmidi_runtime_free(substream);
507 substream->opened = 0;
508 substream->append = 0;
510 rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substream_opened--;
512 up(&rmidi->open_mutex);
513 module_put(rmidi->card->module);
517 static int snd_rawmidi_release(struct inode *inode, struct file *file)
519 struct snd_rawmidi_file *rfile;
520 struct snd_rawmidi *rmidi;
523 rfile = file->private_data;
524 err = snd_rawmidi_kernel_release(rfile);
525 rmidi = rfile->rmidi;
526 wake_up(&rmidi->open_wait);
528 snd_card_file_remove(rmidi->card, file);
532 int snd_rawmidi_info(struct snd_rawmidi_substream *substream,
533 struct snd_rawmidi_info *info)
535 struct snd_rawmidi *rmidi;
537 if (substream == NULL)
539 rmidi = substream->rmidi;
540 memset(info, 0, sizeof(*info));
541 info->card = rmidi->card->number;
542 info->device = rmidi->device;
543 info->subdevice = substream->number;
544 info->stream = substream->stream;
545 info->flags = rmidi->info_flags;
546 strcpy(info->id, rmidi->id);
547 strcpy(info->name, rmidi->name);
548 strcpy(info->subname, substream->name);
549 info->subdevices_count = substream->pstr->substream_count;
550 info->subdevices_avail = (substream->pstr->substream_count -
551 substream->pstr->substream_opened);
555 static int snd_rawmidi_info_user(struct snd_rawmidi_substream *substream,
556 struct snd_rawmidi_info __user * _info)
558 struct snd_rawmidi_info info;
560 if ((err = snd_rawmidi_info(substream, &info)) < 0)
562 if (copy_to_user(_info, &info, sizeof(struct snd_rawmidi_info)))
567 int snd_rawmidi_info_select(struct snd_card *card, struct snd_rawmidi_info *info)
569 struct snd_rawmidi *rmidi;
570 struct snd_rawmidi_str *pstr;
571 struct snd_rawmidi_substream *substream;
572 struct list_head *list;
573 if (info->device >= SNDRV_RAWMIDI_DEVICES)
575 rmidi = snd_rawmidi_devices[card->number * SNDRV_RAWMIDI_DEVICES + info->device];
578 if (info->stream < 0 || info->stream > 1)
580 pstr = &rmidi->streams[info->stream];
581 if (pstr->substream_count == 0)
583 if (info->subdevice >= pstr->substream_count)
585 list_for_each(list, &pstr->substreams) {
586 substream = list_entry(list, struct snd_rawmidi_substream, list);
587 if ((unsigned int)substream->number == info->subdevice)
588 return snd_rawmidi_info(substream, info);
593 static int snd_rawmidi_info_select_user(struct snd_card *card,
594 struct snd_rawmidi_info __user *_info)
597 struct snd_rawmidi_info info;
598 if (get_user(info.device, &_info->device))
600 if (get_user(info.stream, &_info->stream))
602 if (get_user(info.subdevice, &_info->subdevice))
604 if ((err = snd_rawmidi_info_select(card, &info)) < 0)
606 if (copy_to_user(_info, &info, sizeof(struct snd_rawmidi_info)))
611 int snd_rawmidi_output_params(struct snd_rawmidi_substream *substream,
612 struct snd_rawmidi_params * params)
615 struct snd_rawmidi_runtime *runtime = substream->runtime;
617 if (substream->append && substream->use_count > 1)
619 snd_rawmidi_drain_output(substream);
620 if (params->buffer_size < 32 || params->buffer_size > 1024L * 1024L) {
623 if (params->avail_min < 1 || params->avail_min > params->buffer_size) {
626 if (params->buffer_size != runtime->buffer_size) {
627 if ((newbuf = (char *) kmalloc(params->buffer_size, GFP_KERNEL)) == NULL)
629 kfree(runtime->buffer);
630 runtime->buffer = newbuf;
631 runtime->buffer_size = params->buffer_size;
633 runtime->avail_min = params->avail_min;
634 substream->active_sensing = !params->no_active_sensing;
638 int snd_rawmidi_input_params(struct snd_rawmidi_substream *substream,
639 struct snd_rawmidi_params * params)
642 struct snd_rawmidi_runtime *runtime = substream->runtime;
644 snd_rawmidi_drain_input(substream);
645 if (params->buffer_size < 32 || params->buffer_size > 1024L * 1024L) {
648 if (params->avail_min < 1 || params->avail_min > params->buffer_size) {
651 if (params->buffer_size != runtime->buffer_size) {
652 if ((newbuf = (char *) kmalloc(params->buffer_size, GFP_KERNEL)) == NULL)
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 tmp = card->number * SNDRV_RAWMIDI_DEVICES;
810 case SNDRV_CTL_IOCTL_RAWMIDI_NEXT_DEVICE:
814 if (get_user(device, (int __user *)argp))
816 device = device < 0 ? 0 : device + 1;
817 while (device < SNDRV_RAWMIDI_DEVICES) {
818 if (snd_rawmidi_devices[tmp + device])
822 if (device == SNDRV_RAWMIDI_DEVICES)
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;
1306 struct list_head *list;
1308 rmidi = entry->private_data;
1309 snd_iprintf(buffer, "%s\n\n", rmidi->name);
1310 down(&rmidi->open_mutex);
1311 if (rmidi->info_flags & SNDRV_RAWMIDI_INFO_OUTPUT) {
1312 list_for_each(list, &rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substreams) {
1313 substream = list_entry(list, struct snd_rawmidi_substream, list);
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(list, &rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substreams) {
1333 substream = list_entry(list, struct snd_rawmidi_substream, list);
1336 " Rx bytes : %lu\n",
1338 (unsigned long) substream->bytes);
1339 if (substream->opened) {
1340 runtime = substream->runtime;
1342 " Buffer size : %lu\n"
1344 " Overruns : %lu\n",
1345 (unsigned long) runtime->buffer_size,
1346 (unsigned long) runtime->avail,
1347 (unsigned long) runtime->xruns);
1351 up(&rmidi->open_mutex);
1355 * Register functions
1358 static struct file_operations snd_rawmidi_f_ops =
1360 .owner = THIS_MODULE,
1361 .read = snd_rawmidi_read,
1362 .write = snd_rawmidi_write,
1363 .open = snd_rawmidi_open,
1364 .release = snd_rawmidi_release,
1365 .poll = snd_rawmidi_poll,
1366 .unlocked_ioctl = snd_rawmidi_ioctl,
1367 .compat_ioctl = snd_rawmidi_ioctl_compat,
1370 static struct snd_minor snd_rawmidi_reg =
1372 .comment = "raw midi",
1373 .f_ops = &snd_rawmidi_f_ops,
1376 static int snd_rawmidi_alloc_substreams(struct snd_rawmidi *rmidi,
1377 struct snd_rawmidi_str *stream,
1381 struct snd_rawmidi_substream *substream;
1384 INIT_LIST_HEAD(&stream->substreams);
1385 for (idx = 0; idx < count; idx++) {
1386 substream = kzalloc(sizeof(*substream), GFP_KERNEL);
1387 if (substream == NULL) {
1388 snd_printk(KERN_ERR "rawmidi: cannot allocate substream\n");
1391 substream->stream = direction;
1392 substream->number = idx;
1393 substream->rmidi = rmidi;
1394 substream->pstr = stream;
1395 list_add_tail(&substream->list, &stream->substreams);
1396 stream->substream_count++;
1402 * snd_rawmidi_new - create a rawmidi instance
1403 * @card: the card instance
1404 * @id: the id string
1405 * @device: the device index
1406 * @output_count: the number of output streams
1407 * @input_count: the number of input streams
1408 * @rrawmidi: the pointer to store the new rawmidi instance
1410 * Creates a new rawmidi instance.
1411 * Use snd_rawmidi_set_ops() to set the operators to the new instance.
1413 * Returns zero if successful, or a negative error code on failure.
1415 int snd_rawmidi_new(struct snd_card *card, char *id, int device,
1416 int output_count, int input_count,
1417 struct snd_rawmidi ** rrawmidi)
1419 struct snd_rawmidi *rmidi;
1421 static struct snd_device_ops ops = {
1422 .dev_free = snd_rawmidi_dev_free,
1423 .dev_register = snd_rawmidi_dev_register,
1424 .dev_disconnect = snd_rawmidi_dev_disconnect,
1425 .dev_unregister = snd_rawmidi_dev_unregister
1428 snd_assert(rrawmidi != NULL, return -EINVAL);
1430 snd_assert(card != NULL, return -ENXIO);
1431 rmidi = kzalloc(sizeof(*rmidi), GFP_KERNEL);
1432 if (rmidi == NULL) {
1433 snd_printk(KERN_ERR "rawmidi: cannot allocate\n");
1437 rmidi->device = device;
1438 init_MUTEX(&rmidi->open_mutex);
1439 init_waitqueue_head(&rmidi->open_wait);
1441 strlcpy(rmidi->id, id, sizeof(rmidi->id));
1442 if ((err = snd_rawmidi_alloc_substreams(rmidi,
1443 &rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT],
1444 SNDRV_RAWMIDI_STREAM_INPUT,
1445 input_count)) < 0) {
1446 snd_rawmidi_free(rmidi);
1449 if ((err = snd_rawmidi_alloc_substreams(rmidi,
1450 &rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT],
1451 SNDRV_RAWMIDI_STREAM_OUTPUT,
1452 output_count)) < 0) {
1453 snd_rawmidi_free(rmidi);
1456 if ((err = snd_device_new(card, SNDRV_DEV_RAWMIDI, rmidi, &ops)) < 0) {
1457 snd_rawmidi_free(rmidi);
1464 static void snd_rawmidi_free_substreams(struct snd_rawmidi_str *stream)
1466 struct snd_rawmidi_substream *substream;
1468 while (!list_empty(&stream->substreams)) {
1469 substream = list_entry(stream->substreams.next, struct snd_rawmidi_substream, list);
1470 list_del(&substream->list);
1475 static int snd_rawmidi_free(struct snd_rawmidi *rmidi)
1477 snd_assert(rmidi != NULL, return -ENXIO);
1478 snd_rawmidi_free_substreams(&rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT]);
1479 snd_rawmidi_free_substreams(&rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT]);
1480 if (rmidi->private_free)
1481 rmidi->private_free(rmidi);
1486 static int snd_rawmidi_dev_free(struct snd_device *device)
1488 struct snd_rawmidi *rmidi = device->device_data;
1489 return snd_rawmidi_free(rmidi);
1492 #if defined(CONFIG_SND_SEQUENCER) || (defined(MODULE) && defined(CONFIG_SND_SEQUENCER_MODULE))
1493 static void snd_rawmidi_dev_seq_free(struct snd_seq_device *device)
1495 struct snd_rawmidi *rmidi = device->private_data;
1496 rmidi->seq_dev = NULL;
1500 static int snd_rawmidi_dev_register(struct snd_device *device)
1503 struct snd_info_entry *entry;
1505 struct snd_rawmidi *rmidi = device->device_data;
1507 if (rmidi->device >= SNDRV_RAWMIDI_DEVICES)
1509 down(®ister_mutex);
1510 idx = (rmidi->card->number * SNDRV_RAWMIDI_DEVICES) + rmidi->device;
1511 if (snd_rawmidi_devices[idx] != NULL) {
1512 up(®ister_mutex);
1515 snd_rawmidi_devices[idx] = rmidi;
1516 sprintf(name, "midiC%iD%i", rmidi->card->number, rmidi->device);
1517 if ((err = snd_register_device(SNDRV_DEVICE_TYPE_RAWMIDI,
1518 rmidi->card, rmidi->device,
1519 &snd_rawmidi_reg, name)) < 0) {
1520 snd_printk(KERN_ERR "unable to register rawmidi device %i:%i\n", rmidi->card->number, rmidi->device);
1521 snd_rawmidi_devices[idx] = NULL;
1522 up(®ister_mutex);
1525 if (rmidi->ops && rmidi->ops->dev_register &&
1526 (err = rmidi->ops->dev_register(rmidi)) < 0) {
1527 snd_unregister_device(SNDRV_DEVICE_TYPE_RAWMIDI, rmidi->card, rmidi->device);
1528 snd_rawmidi_devices[idx] = NULL;
1529 up(®ister_mutex);
1532 #ifdef CONFIG_SND_OSSEMUL
1534 if ((int)rmidi->device == midi_map[rmidi->card->number]) {
1535 if (snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_MIDI,
1536 rmidi->card, 0, &snd_rawmidi_reg, name) < 0) {
1537 snd_printk(KERN_ERR "unable to register OSS rawmidi device %i:%i\n", rmidi->card->number, 0);
1540 #ifdef SNDRV_OSS_INFO_DEV_MIDI
1541 snd_oss_info_register(SNDRV_OSS_INFO_DEV_MIDI, rmidi->card->number, rmidi->name);
1545 if ((int)rmidi->device == amidi_map[rmidi->card->number]) {
1546 if (snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_MIDI,
1547 rmidi->card, 1, &snd_rawmidi_reg, name) < 0) {
1548 snd_printk(KERN_ERR "unable to register OSS rawmidi device %i:%i\n", rmidi->card->number, 1);
1553 #endif /* CONFIG_SND_OSSEMUL */
1554 up(®ister_mutex);
1555 sprintf(name, "midi%d", rmidi->device);
1556 entry = snd_info_create_card_entry(rmidi->card, name, rmidi->card->proc_root);
1558 entry->private_data = rmidi;
1559 entry->c.text.read_size = 1024;
1560 entry->c.text.read = snd_rawmidi_proc_info_read;
1561 if (snd_info_register(entry) < 0) {
1562 snd_info_free_entry(entry);
1566 rmidi->proc_entry = entry;
1567 #if defined(CONFIG_SND_SEQUENCER) || (defined(MODULE) && defined(CONFIG_SND_SEQUENCER_MODULE))
1568 if (!rmidi->ops || !rmidi->ops->dev_register) { /* own registration mechanism */
1569 if (snd_seq_device_new(rmidi->card, rmidi->device, SNDRV_SEQ_DEV_ID_MIDISYNTH, 0, &rmidi->seq_dev) >= 0) {
1570 rmidi->seq_dev->private_data = rmidi;
1571 rmidi->seq_dev->private_free = snd_rawmidi_dev_seq_free;
1572 sprintf(rmidi->seq_dev->name, "MIDI %d-%d", rmidi->card->number, rmidi->device);
1573 snd_device_register(rmidi->card, rmidi->seq_dev);
1580 static int snd_rawmidi_dev_disconnect(struct snd_device *device)
1582 struct snd_rawmidi *rmidi = device->device_data;
1585 down(®ister_mutex);
1586 idx = (rmidi->card->number * SNDRV_RAWMIDI_DEVICES) + rmidi->device;
1587 snd_rawmidi_devices[idx] = NULL;
1588 up(®ister_mutex);
1592 static int snd_rawmidi_dev_unregister(struct snd_device *device)
1595 struct snd_rawmidi *rmidi = device->device_data;
1597 snd_assert(rmidi != NULL, return -ENXIO);
1598 down(®ister_mutex);
1599 idx = (rmidi->card->number * SNDRV_RAWMIDI_DEVICES) + rmidi->device;
1600 snd_rawmidi_devices[idx] = NULL;
1601 if (rmidi->proc_entry) {
1602 snd_info_unregister(rmidi->proc_entry);
1603 rmidi->proc_entry = NULL;
1605 #ifdef CONFIG_SND_OSSEMUL
1606 if (rmidi->ossreg) {
1607 if ((int)rmidi->device == midi_map[rmidi->card->number]) {
1608 snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_MIDI, rmidi->card, 0);
1609 #ifdef SNDRV_OSS_INFO_DEV_MIDI
1610 snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_MIDI, rmidi->card->number);
1613 if ((int)rmidi->device == amidi_map[rmidi->card->number])
1614 snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_MIDI, rmidi->card, 1);
1617 #endif /* CONFIG_SND_OSSEMUL */
1618 if (rmidi->ops && rmidi->ops->dev_unregister)
1619 rmidi->ops->dev_unregister(rmidi);
1620 snd_unregister_device(SNDRV_DEVICE_TYPE_RAWMIDI, rmidi->card, rmidi->device);
1621 up(®ister_mutex);
1622 #if defined(CONFIG_SND_SEQUENCER) || (defined(MODULE) && defined(CONFIG_SND_SEQUENCER_MODULE))
1623 if (rmidi->seq_dev) {
1624 snd_device_free(rmidi->card, rmidi->seq_dev);
1625 rmidi->seq_dev = NULL;
1628 return snd_rawmidi_free(rmidi);
1632 * snd_rawmidi_set_ops - set the rawmidi operators
1633 * @rmidi: the rawmidi instance
1634 * @stream: the stream direction, SNDRV_RAWMIDI_STREAM_XXX
1635 * @ops: the operator table
1637 * Sets the rawmidi operators for the given stream direction.
1639 void snd_rawmidi_set_ops(struct snd_rawmidi *rmidi, int stream,
1640 struct snd_rawmidi_ops *ops)
1642 struct list_head *list;
1643 struct snd_rawmidi_substream *substream;
1645 list_for_each(list, &rmidi->streams[stream].substreams) {
1646 substream = list_entry(list, struct snd_rawmidi_substream, list);
1647 substream->ops = ops;
1655 static int __init alsa_rawmidi_init(void)
1658 snd_ctl_register_ioctl(snd_rawmidi_control_ioctl);
1659 snd_ctl_register_ioctl_compat(snd_rawmidi_control_ioctl);
1660 #ifdef CONFIG_SND_OSSEMUL
1662 /* check device map table */
1663 for (i = 0; i < SNDRV_CARDS; i++) {
1664 if (midi_map[i] < 0 || midi_map[i] >= SNDRV_RAWMIDI_DEVICES) {
1665 snd_printk(KERN_ERR "invalid midi_map[%d] = %d\n", i, midi_map[i]);
1668 if (amidi_map[i] < 0 || amidi_map[i] >= SNDRV_RAWMIDI_DEVICES) {
1669 snd_printk(KERN_ERR "invalid amidi_map[%d] = %d\n", i, amidi_map[i]);
1674 #endif /* CONFIG_SND_OSSEMUL */
1678 static void __exit alsa_rawmidi_exit(void)
1680 snd_ctl_unregister_ioctl(snd_rawmidi_control_ioctl);
1681 snd_ctl_unregister_ioctl_compat(snd_rawmidi_control_ioctl);
1684 module_init(alsa_rawmidi_init)
1685 module_exit(alsa_rawmidi_exit)
1687 EXPORT_SYMBOL(snd_rawmidi_output_params);
1688 EXPORT_SYMBOL(snd_rawmidi_input_params);
1689 EXPORT_SYMBOL(snd_rawmidi_drop_output);
1690 EXPORT_SYMBOL(snd_rawmidi_drain_output);
1691 EXPORT_SYMBOL(snd_rawmidi_drain_input);
1692 EXPORT_SYMBOL(snd_rawmidi_receive);
1693 EXPORT_SYMBOL(snd_rawmidi_transmit_empty);
1694 EXPORT_SYMBOL(snd_rawmidi_transmit_peek);
1695 EXPORT_SYMBOL(snd_rawmidi_transmit_ack);
1696 EXPORT_SYMBOL(snd_rawmidi_transmit);
1697 EXPORT_SYMBOL(snd_rawmidi_new);
1698 EXPORT_SYMBOL(snd_rawmidi_set_ops);
1699 EXPORT_SYMBOL(snd_rawmidi_info);
1700 EXPORT_SYMBOL(snd_rawmidi_info_select);
1701 EXPORT_SYMBOL(snd_rawmidi_kernel_open);
1702 EXPORT_SYMBOL(snd_rawmidi_kernel_release);
1703 EXPORT_SYMBOL(snd_rawmidi_kernel_read);
1704 EXPORT_SYMBOL(snd_rawmidi_kernel_write);