ALSA: hda - Add SSID table for iMac7,1.
[linux-2.6.git] / sound / core / rawmidi.c
1 /*
2  *  Abstract layer for MIDI v1.0 stream
3  *  Copyright (c) by Jaroslav Kysela <perex@perex.cz>
4  *
5  *
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.
10  *
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.
15  *
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
19  *
20  */
21
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>
37
38 MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>");
39 MODULE_DESCRIPTION("Midlevel RawMidi code for ALSA.");
40 MODULE_LICENSE("GPL");
41
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 */
50
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);
55
56 static LIST_HEAD(snd_rawmidi_devices);
57 static DEFINE_MUTEX(register_mutex);
58
59 static struct snd_rawmidi *snd_rawmidi_search(struct snd_card *card, int device)
60 {
61         struct snd_rawmidi *rawmidi;
62
63         list_for_each_entry(rawmidi, &snd_rawmidi_devices, list)
64                 if (rawmidi->card == card && rawmidi->device == device)
65                         return rawmidi;
66         return NULL;
67 }
68
69 static inline unsigned short snd_rawmidi_file_flags(struct file *file)
70 {
71         switch (file->f_mode & (FMODE_READ | FMODE_WRITE)) {
72         case FMODE_WRITE:
73                 return SNDRV_RAWMIDI_LFLG_OUTPUT;
74         case FMODE_READ:
75                 return SNDRV_RAWMIDI_LFLG_INPUT;
76         default:
77                 return SNDRV_RAWMIDI_LFLG_OPEN;
78         }
79 }
80
81 static inline int snd_rawmidi_ready(struct snd_rawmidi_substream *substream)
82 {
83         struct snd_rawmidi_runtime *runtime = substream->runtime;
84         return runtime->avail >= runtime->avail_min;
85 }
86
87 static inline int snd_rawmidi_ready_append(struct snd_rawmidi_substream *substream,
88                                            size_t count)
89 {
90         struct snd_rawmidi_runtime *runtime = substream->runtime;
91         return runtime->avail >= runtime->avail_min &&
92                (!substream->append || runtime->avail >= count);
93 }
94
95 static void snd_rawmidi_input_event_tasklet(unsigned long data)
96 {
97         struct snd_rawmidi_substream *substream = (struct snd_rawmidi_substream *)data;
98         substream->runtime->event(substream);
99 }
100
101 static void snd_rawmidi_output_trigger_tasklet(unsigned long data)
102 {
103         struct snd_rawmidi_substream *substream = (struct snd_rawmidi_substream *)data;
104         substream->ops->trigger(substream, 1);
105 }
106
107 static int snd_rawmidi_runtime_create(struct snd_rawmidi_substream *substream)
108 {
109         struct snd_rawmidi_runtime *runtime;
110
111         if ((runtime = kzalloc(sizeof(*runtime), GFP_KERNEL)) == NULL)
112                 return -ENOMEM;
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);
119         else
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)
127                 runtime->avail = 0;
128         else
129                 runtime->avail = runtime->buffer_size;
130         if ((runtime->buffer = kmalloc(runtime->buffer_size, GFP_KERNEL)) == NULL) {
131                 kfree(runtime);
132                 return -ENOMEM;
133         }
134         runtime->appl_ptr = runtime->hw_ptr = 0;
135         substream->runtime = runtime;
136         return 0;
137 }
138
139 static int snd_rawmidi_runtime_free(struct snd_rawmidi_substream *substream)
140 {
141         struct snd_rawmidi_runtime *runtime = substream->runtime;
142
143         kfree(runtime->buffer);
144         kfree(runtime);
145         substream->runtime = NULL;
146         return 0;
147 }
148
149 static inline void snd_rawmidi_output_trigger(struct snd_rawmidi_substream *substream,int up)
150 {
151         if (!substream->opened)
152                 return;
153         if (up) {
154                 tasklet_schedule(&substream->runtime->tasklet);
155         } else {
156                 tasklet_kill(&substream->runtime->tasklet);
157                 substream->ops->trigger(substream, 0);
158         }
159 }
160
161 static void snd_rawmidi_input_trigger(struct snd_rawmidi_substream *substream, int up)
162 {
163         if (!substream->opened)
164                 return;
165         substream->ops->trigger(substream, up);
166         if (!up && substream->runtime->event)
167                 tasklet_kill(&substream->runtime->tasklet);
168 }
169
170 int snd_rawmidi_drop_output(struct snd_rawmidi_substream *substream)
171 {
172         unsigned long flags;
173         struct snd_rawmidi_runtime *runtime = substream->runtime;
174
175         snd_rawmidi_output_trigger(substream, 0);
176         runtime->drain = 0;
177         spin_lock_irqsave(&runtime->lock, flags);
178         runtime->appl_ptr = runtime->hw_ptr = 0;
179         runtime->avail = runtime->buffer_size;
180         spin_unlock_irqrestore(&runtime->lock, flags);
181         return 0;
182 }
183
184 int snd_rawmidi_drain_output(struct snd_rawmidi_substream *substream)
185 {
186         int err;
187         long timeout;
188         struct snd_rawmidi_runtime *runtime = substream->runtime;
189
190         err = 0;
191         runtime->drain = 1;
192         timeout = wait_event_interruptible_timeout(runtime->sleep,
193                                 (runtime->avail >= runtime->buffer_size),
194                                 10*HZ);
195         if (signal_pending(current))
196                 err = -ERESTARTSYS;
197         if (runtime->avail < runtime->buffer_size && !timeout) {
198                 snd_printk(KERN_WARNING "rawmidi drain error (avail = %li, buffer_size = %li)\n", (long)runtime->avail, (long)runtime->buffer_size);
199                 err = -EIO;
200         }
201         runtime->drain = 0;
202         if (err != -ERESTARTSYS) {
203                 /* we need wait a while to make sure that Tx FIFOs are empty */
204                 if (substream->ops->drain)
205                         substream->ops->drain(substream);
206                 else
207                         msleep(50);
208                 snd_rawmidi_drop_output(substream);
209         }
210         return err;
211 }
212
213 int snd_rawmidi_drain_input(struct snd_rawmidi_substream *substream)
214 {
215         unsigned long flags;
216         struct snd_rawmidi_runtime *runtime = substream->runtime;
217
218         snd_rawmidi_input_trigger(substream, 0);
219         runtime->drain = 0;
220         spin_lock_irqsave(&runtime->lock, flags);
221         runtime->appl_ptr = runtime->hw_ptr = 0;
222         runtime->avail = 0;
223         spin_unlock_irqrestore(&runtime->lock, flags);
224         return 0;
225 }
226
227 /* look for an available substream for the given stream direction;
228  * if a specific subdevice is given, try to assign it
229  */
230 static int assign_substream(struct snd_rawmidi *rmidi, int subdevice,
231                             int stream, int mode,
232                             struct snd_rawmidi_substream **sub_ret)
233 {
234         struct snd_rawmidi_substream *substream;
235         struct snd_rawmidi_str *s = &rmidi->streams[stream];
236         static unsigned int info_flags[2] = {
237                 [SNDRV_RAWMIDI_STREAM_OUTPUT] = SNDRV_RAWMIDI_INFO_OUTPUT,
238                 [SNDRV_RAWMIDI_STREAM_INPUT] = SNDRV_RAWMIDI_INFO_INPUT,
239         };
240
241         if (!(rmidi->info_flags & info_flags[stream]))
242                 return -ENXIO;
243         if (subdevice >= 0 && subdevice >= s->substream_count)
244                 return -ENODEV;
245
246         list_for_each_entry(substream, &s->substreams, list) {
247                 if (substream->opened) {
248                         if (stream == SNDRV_RAWMIDI_STREAM_INPUT ||
249                             !(mode & SNDRV_RAWMIDI_LFLG_APPEND) ||
250                             !substream->append)
251                                 continue;
252                 }
253                 if (subdevice < 0 || subdevice == substream->number) {
254                         *sub_ret = substream;
255                         return 0;
256                 }
257         }
258         return -EAGAIN;
259 }
260
261 /* open and do ref-counting for the given substream */
262 static int open_substream(struct snd_rawmidi *rmidi,
263                           struct snd_rawmidi_substream *substream,
264                           int mode)
265 {
266         int err;
267
268         if (substream->use_count == 0) {
269                 err = snd_rawmidi_runtime_create(substream);
270                 if (err < 0)
271                         return err;
272                 err = substream->ops->open(substream);
273                 if (err < 0) {
274                         snd_rawmidi_runtime_free(substream);
275                         return err;
276                 }
277                 substream->opened = 1;
278                 substream->active_sensing = 0;
279                 if (mode & SNDRV_RAWMIDI_LFLG_APPEND)
280                         substream->append = 1;
281                 substream->pid = get_pid(task_pid(current));
282                 rmidi->streams[substream->stream].substream_opened++;
283         }
284         substream->use_count++;
285         return 0;
286 }
287
288 static void close_substream(struct snd_rawmidi *rmidi,
289                             struct snd_rawmidi_substream *substream,
290                             int cleanup);
291
292 static int rawmidi_open_priv(struct snd_rawmidi *rmidi, int subdevice, int mode,
293                              struct snd_rawmidi_file *rfile)
294 {
295         struct snd_rawmidi_substream *sinput = NULL, *soutput = NULL;
296         int err;
297
298         rfile->input = rfile->output = NULL;
299         if (mode & SNDRV_RAWMIDI_LFLG_INPUT) {
300                 err = assign_substream(rmidi, subdevice,
301                                        SNDRV_RAWMIDI_STREAM_INPUT,
302                                        mode, &sinput);
303                 if (err < 0)
304                         return err;
305         }
306         if (mode & SNDRV_RAWMIDI_LFLG_OUTPUT) {
307                 err = assign_substream(rmidi, subdevice,
308                                        SNDRV_RAWMIDI_STREAM_OUTPUT,
309                                        mode, &soutput);
310                 if (err < 0)
311                         return err;
312         }
313
314         if (sinput) {
315                 err = open_substream(rmidi, sinput, mode);
316                 if (err < 0)
317                         return err;
318         }
319         if (soutput) {
320                 err = open_substream(rmidi, soutput, mode);
321                 if (err < 0) {
322                         if (sinput)
323                                 close_substream(rmidi, sinput, 0);
324                         return err;
325                 }
326         }
327
328         rfile->rmidi = rmidi;
329         rfile->input = sinput;
330         rfile->output = soutput;
331         return 0;
332 }
333
334 /* called from sound/core/seq/seq_midi.c */
335 int snd_rawmidi_kernel_open(struct snd_card *card, int device, int subdevice,
336                             int mode, struct snd_rawmidi_file * rfile)
337 {
338         struct snd_rawmidi *rmidi;
339         int err;
340
341         if (snd_BUG_ON(!rfile))
342                 return -EINVAL;
343
344         mutex_lock(&register_mutex);
345         rmidi = snd_rawmidi_search(card, device);
346         if (rmidi == NULL) {
347                 mutex_unlock(&register_mutex);
348                 return -ENODEV;
349         }
350         if (!try_module_get(rmidi->card->module)) {
351                 mutex_unlock(&register_mutex);
352                 return -ENXIO;
353         }
354         mutex_unlock(&register_mutex);
355
356         mutex_lock(&rmidi->open_mutex);
357         err = rawmidi_open_priv(rmidi, subdevice, mode, rfile);
358         mutex_unlock(&rmidi->open_mutex);
359         if (err < 0)
360                 module_put(rmidi->card->module);
361         return err;
362 }
363
364 static int snd_rawmidi_open(struct inode *inode, struct file *file)
365 {
366         int maj = imajor(inode);
367         struct snd_card *card;
368         int subdevice;
369         unsigned short fflags;
370         int err;
371         struct snd_rawmidi *rmidi;
372         struct snd_rawmidi_file *rawmidi_file = NULL;
373         wait_queue_t wait;
374         struct snd_ctl_file *kctl;
375
376         if ((file->f_flags & O_APPEND) && !(file->f_flags & O_NONBLOCK)) 
377                 return -EINVAL;         /* invalid combination */
378
379         err = nonseekable_open(inode, file);
380         if (err < 0)
381                 return err;
382
383         if (maj == snd_major) {
384                 rmidi = snd_lookup_minor_data(iminor(inode),
385                                               SNDRV_DEVICE_TYPE_RAWMIDI);
386 #ifdef CONFIG_SND_OSSEMUL
387         } else if (maj == SOUND_MAJOR) {
388                 rmidi = snd_lookup_oss_minor_data(iminor(inode),
389                                                   SNDRV_OSS_DEVICE_TYPE_MIDI);
390 #endif
391         } else
392                 return -ENXIO;
393
394         if (rmidi == NULL)
395                 return -ENODEV;
396
397         if (!try_module_get(rmidi->card->module))
398                 return -ENXIO;
399
400         mutex_lock(&rmidi->open_mutex);
401         card = rmidi->card;
402         err = snd_card_file_add(card, file);
403         if (err < 0)
404                 goto __error_card;
405         fflags = snd_rawmidi_file_flags(file);
406         if ((file->f_flags & O_APPEND) || maj == SOUND_MAJOR) /* OSS emul? */
407                 fflags |= SNDRV_RAWMIDI_LFLG_APPEND;
408         rawmidi_file = kmalloc(sizeof(*rawmidi_file), GFP_KERNEL);
409         if (rawmidi_file == NULL) {
410                 err = -ENOMEM;
411                 goto __error;
412         }
413         init_waitqueue_entry(&wait, current);
414         add_wait_queue(&rmidi->open_wait, &wait);
415         while (1) {
416                 subdevice = -1;
417                 read_lock(&card->ctl_files_rwlock);
418                 list_for_each_entry(kctl, &card->ctl_files, list) {
419                         if (kctl->pid == task_pid(current)) {
420                                 subdevice = kctl->prefer_rawmidi_subdevice;
421                                 if (subdevice != -1)
422                                         break;
423                         }
424                 }
425                 read_unlock(&card->ctl_files_rwlock);
426                 err = rawmidi_open_priv(rmidi, subdevice, fflags, rawmidi_file);
427                 if (err >= 0)
428                         break;
429                 if (err == -EAGAIN) {
430                         if (file->f_flags & O_NONBLOCK) {
431                                 err = -EBUSY;
432                                 break;
433                         }
434                 } else
435                         break;
436                 set_current_state(TASK_INTERRUPTIBLE);
437                 mutex_unlock(&rmidi->open_mutex);
438                 schedule();
439                 mutex_lock(&rmidi->open_mutex);
440                 if (signal_pending(current)) {
441                         err = -ERESTARTSYS;
442                         break;
443                 }
444         }
445         remove_wait_queue(&rmidi->open_wait, &wait);
446         if (err < 0) {
447                 kfree(rawmidi_file);
448                 goto __error;
449         }
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);
455 #endif
456         file->private_data = rawmidi_file;
457         mutex_unlock(&rmidi->open_mutex);
458         return 0;
459
460  __error:
461         snd_card_file_remove(card, file);
462  __error_card:
463         mutex_unlock(&rmidi->open_mutex);
464         module_put(rmidi->card->module);
465         return err;
466 }
467
468 static void close_substream(struct snd_rawmidi *rmidi,
469                             struct snd_rawmidi_substream *substream,
470                             int cleanup)
471 {
472         if (--substream->use_count)
473                 return;
474
475         if (cleanup) {
476                 if (substream->stream == SNDRV_RAWMIDI_STREAM_INPUT)
477                         snd_rawmidi_input_trigger(substream, 0);
478                 else {
479                         if (substream->active_sensing) {
480                                 unsigned char buf = 0xfe;
481                                 /* sending single active sensing message
482                                  * to shut the device up
483                                  */
484                                 snd_rawmidi_kernel_write(substream, &buf, 1);
485                         }
486                         if (snd_rawmidi_drain_output(substream) == -ERESTARTSYS)
487                                 snd_rawmidi_output_trigger(substream, 0);
488                 }
489         }
490         substream->ops->close(substream);
491         if (substream->runtime->private_free)
492                 substream->runtime->private_free(substream);
493         snd_rawmidi_runtime_free(substream);
494         substream->opened = 0;
495         substream->append = 0;
496         put_pid(substream->pid);
497         substream->pid = NULL;
498         rmidi->streams[substream->stream].substream_opened--;
499 }
500
501 static void rawmidi_release_priv(struct snd_rawmidi_file *rfile)
502 {
503         struct snd_rawmidi *rmidi;
504
505         rmidi = rfile->rmidi;
506         mutex_lock(&rmidi->open_mutex);
507         if (rfile->input) {
508                 close_substream(rmidi, rfile->input, 1);
509                 rfile->input = NULL;
510         }
511         if (rfile->output) {
512                 close_substream(rmidi, rfile->output, 1);
513                 rfile->output = NULL;
514         }
515         rfile->rmidi = NULL;
516         mutex_unlock(&rmidi->open_mutex);
517         wake_up(&rmidi->open_wait);
518 }
519
520 /* called from sound/core/seq/seq_midi.c */
521 int snd_rawmidi_kernel_release(struct snd_rawmidi_file *rfile)
522 {
523         struct snd_rawmidi *rmidi;
524
525         if (snd_BUG_ON(!rfile))
526                 return -ENXIO;
527         
528         rmidi = rfile->rmidi;
529         rawmidi_release_priv(rfile);
530         module_put(rmidi->card->module);
531         return 0;
532 }
533
534 static int snd_rawmidi_release(struct inode *inode, struct file *file)
535 {
536         struct snd_rawmidi_file *rfile;
537         struct snd_rawmidi *rmidi;
538
539         rfile = file->private_data;
540         rmidi = rfile->rmidi;
541         rawmidi_release_priv(rfile);
542         kfree(rfile);
543         snd_card_file_remove(rmidi->card, file);
544         module_put(rmidi->card->module);
545         return 0;
546 }
547
548 static int snd_rawmidi_info(struct snd_rawmidi_substream *substream,
549                             struct snd_rawmidi_info *info)
550 {
551         struct snd_rawmidi *rmidi;
552         
553         if (substream == NULL)
554                 return -ENODEV;
555         rmidi = substream->rmidi;
556         memset(info, 0, sizeof(*info));
557         info->card = rmidi->card->number;
558         info->device = rmidi->device;
559         info->subdevice = substream->number;
560         info->stream = substream->stream;
561         info->flags = rmidi->info_flags;
562         strcpy(info->id, rmidi->id);
563         strcpy(info->name, rmidi->name);
564         strcpy(info->subname, substream->name);
565         info->subdevices_count = substream->pstr->substream_count;
566         info->subdevices_avail = (substream->pstr->substream_count -
567                                   substream->pstr->substream_opened);
568         return 0;
569 }
570
571 static int snd_rawmidi_info_user(struct snd_rawmidi_substream *substream,
572                                  struct snd_rawmidi_info __user * _info)
573 {
574         struct snd_rawmidi_info info;
575         int err;
576         if ((err = snd_rawmidi_info(substream, &info)) < 0)
577                 return err;
578         if (copy_to_user(_info, &info, sizeof(struct snd_rawmidi_info)))
579                 return -EFAULT;
580         return 0;
581 }
582
583 int snd_rawmidi_info_select(struct snd_card *card, struct snd_rawmidi_info *info)
584 {
585         struct snd_rawmidi *rmidi;
586         struct snd_rawmidi_str *pstr;
587         struct snd_rawmidi_substream *substream;
588
589         mutex_lock(&register_mutex);
590         rmidi = snd_rawmidi_search(card, info->device);
591         mutex_unlock(&register_mutex);
592         if (!rmidi)
593                 return -ENXIO;
594         if (info->stream < 0 || info->stream > 1)
595                 return -EINVAL;
596         pstr = &rmidi->streams[info->stream];
597         if (pstr->substream_count == 0)
598                 return -ENOENT;
599         if (info->subdevice >= pstr->substream_count)
600                 return -ENXIO;
601         list_for_each_entry(substream, &pstr->substreams, list) {
602                 if ((unsigned int)substream->number == info->subdevice)
603                         return snd_rawmidi_info(substream, info);
604         }
605         return -ENXIO;
606 }
607
608 static int snd_rawmidi_info_select_user(struct snd_card *card,
609                                         struct snd_rawmidi_info __user *_info)
610 {
611         int err;
612         struct snd_rawmidi_info info;
613         if (get_user(info.device, &_info->device))
614                 return -EFAULT;
615         if (get_user(info.stream, &_info->stream))
616                 return -EFAULT;
617         if (get_user(info.subdevice, &_info->subdevice))
618                 return -EFAULT;
619         if ((err = snd_rawmidi_info_select(card, &info)) < 0)
620                 return err;
621         if (copy_to_user(_info, &info, sizeof(struct snd_rawmidi_info)))
622                 return -EFAULT;
623         return 0;
624 }
625
626 int snd_rawmidi_output_params(struct snd_rawmidi_substream *substream,
627                               struct snd_rawmidi_params * params)
628 {
629         char *newbuf;
630         struct snd_rawmidi_runtime *runtime = substream->runtime;
631         
632         if (substream->append && substream->use_count > 1)
633                 return -EBUSY;
634         snd_rawmidi_drain_output(substream);
635         if (params->buffer_size < 32 || params->buffer_size > 1024L * 1024L) {
636                 return -EINVAL;
637         }
638         if (params->avail_min < 1 || params->avail_min > params->buffer_size) {
639                 return -EINVAL;
640         }
641         if (params->buffer_size != runtime->buffer_size) {
642                 newbuf = kmalloc(params->buffer_size, GFP_KERNEL);
643                 if (!newbuf)
644                         return -ENOMEM;
645                 kfree(runtime->buffer);
646                 runtime->buffer = newbuf;
647                 runtime->buffer_size = params->buffer_size;
648                 runtime->avail = runtime->buffer_size;
649         }
650         runtime->avail_min = params->avail_min;
651         substream->active_sensing = !params->no_active_sensing;
652         return 0;
653 }
654
655 int snd_rawmidi_input_params(struct snd_rawmidi_substream *substream,
656                              struct snd_rawmidi_params * params)
657 {
658         char *newbuf;
659         struct snd_rawmidi_runtime *runtime = substream->runtime;
660
661         snd_rawmidi_drain_input(substream);
662         if (params->buffer_size < 32 || params->buffer_size > 1024L * 1024L) {
663                 return -EINVAL;
664         }
665         if (params->avail_min < 1 || params->avail_min > params->buffer_size) {
666                 return -EINVAL;
667         }
668         if (params->buffer_size != runtime->buffer_size) {
669                 newbuf = kmalloc(params->buffer_size, GFP_KERNEL);
670                 if (!newbuf)
671                         return -ENOMEM;
672                 kfree(runtime->buffer);
673                 runtime->buffer = newbuf;
674                 runtime->buffer_size = params->buffer_size;
675         }
676         runtime->avail_min = params->avail_min;
677         return 0;
678 }
679
680 static int snd_rawmidi_output_status(struct snd_rawmidi_substream *substream,
681                                      struct snd_rawmidi_status * status)
682 {
683         struct snd_rawmidi_runtime *runtime = substream->runtime;
684
685         memset(status, 0, sizeof(*status));
686         status->stream = SNDRV_RAWMIDI_STREAM_OUTPUT;
687         spin_lock_irq(&runtime->lock);
688         status->avail = runtime->avail;
689         spin_unlock_irq(&runtime->lock);
690         return 0;
691 }
692
693 static int snd_rawmidi_input_status(struct snd_rawmidi_substream *substream,
694                                     struct snd_rawmidi_status * status)
695 {
696         struct snd_rawmidi_runtime *runtime = substream->runtime;
697
698         memset(status, 0, sizeof(*status));
699         status->stream = SNDRV_RAWMIDI_STREAM_INPUT;
700         spin_lock_irq(&runtime->lock);
701         status->avail = runtime->avail;
702         status->xruns = runtime->xruns;
703         runtime->xruns = 0;
704         spin_unlock_irq(&runtime->lock);
705         return 0;
706 }
707
708 static long snd_rawmidi_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
709 {
710         struct snd_rawmidi_file *rfile;
711         void __user *argp = (void __user *)arg;
712
713         rfile = file->private_data;
714         if (((cmd >> 8) & 0xff) != 'W')
715                 return -ENOTTY;
716         switch (cmd) {
717         case SNDRV_RAWMIDI_IOCTL_PVERSION:
718                 return put_user(SNDRV_RAWMIDI_VERSION, (int __user *)argp) ? -EFAULT : 0;
719         case SNDRV_RAWMIDI_IOCTL_INFO:
720         {
721                 int stream;
722                 struct snd_rawmidi_info __user *info = argp;
723                 if (get_user(stream, &info->stream))
724                         return -EFAULT;
725                 switch (stream) {
726                 case SNDRV_RAWMIDI_STREAM_INPUT:
727                         return snd_rawmidi_info_user(rfile->input, info);
728                 case SNDRV_RAWMIDI_STREAM_OUTPUT:
729                         return snd_rawmidi_info_user(rfile->output, info);
730                 default:
731                         return -EINVAL;
732                 }
733         }
734         case SNDRV_RAWMIDI_IOCTL_PARAMS:
735         {
736                 struct snd_rawmidi_params params;
737                 if (copy_from_user(&params, argp, sizeof(struct snd_rawmidi_params)))
738                         return -EFAULT;
739                 switch (params.stream) {
740                 case SNDRV_RAWMIDI_STREAM_OUTPUT:
741                         if (rfile->output == NULL)
742                                 return -EINVAL;
743                         return snd_rawmidi_output_params(rfile->output, &params);
744                 case SNDRV_RAWMIDI_STREAM_INPUT:
745                         if (rfile->input == NULL)
746                                 return -EINVAL;
747                         return snd_rawmidi_input_params(rfile->input, &params);
748                 default:
749                         return -EINVAL;
750                 }
751         }
752         case SNDRV_RAWMIDI_IOCTL_STATUS:
753         {
754                 int err = 0;
755                 struct snd_rawmidi_status status;
756                 if (copy_from_user(&status, argp, sizeof(struct snd_rawmidi_status)))
757                         return -EFAULT;
758                 switch (status.stream) {
759                 case SNDRV_RAWMIDI_STREAM_OUTPUT:
760                         if (rfile->output == NULL)
761                                 return -EINVAL;
762                         err = snd_rawmidi_output_status(rfile->output, &status);
763                         break;
764                 case SNDRV_RAWMIDI_STREAM_INPUT:
765                         if (rfile->input == NULL)
766                                 return -EINVAL;
767                         err = snd_rawmidi_input_status(rfile->input, &status);
768                         break;
769                 default:
770                         return -EINVAL;
771                 }
772                 if (err < 0)
773                         return err;
774                 if (copy_to_user(argp, &status, sizeof(struct snd_rawmidi_status)))
775                         return -EFAULT;
776                 return 0;
777         }
778         case SNDRV_RAWMIDI_IOCTL_DROP:
779         {
780                 int val;
781                 if (get_user(val, (int __user *) argp))
782                         return -EFAULT;
783                 switch (val) {
784                 case SNDRV_RAWMIDI_STREAM_OUTPUT:
785                         if (rfile->output == NULL)
786                                 return -EINVAL;
787                         return snd_rawmidi_drop_output(rfile->output);
788                 default:
789                         return -EINVAL;
790                 }
791         }
792         case SNDRV_RAWMIDI_IOCTL_DRAIN:
793         {
794                 int val;
795                 if (get_user(val, (int __user *) argp))
796                         return -EFAULT;
797                 switch (val) {
798                 case SNDRV_RAWMIDI_STREAM_OUTPUT:
799                         if (rfile->output == NULL)
800                                 return -EINVAL;
801                         return snd_rawmidi_drain_output(rfile->output);
802                 case SNDRV_RAWMIDI_STREAM_INPUT:
803                         if (rfile->input == NULL)
804                                 return -EINVAL;
805                         return snd_rawmidi_drain_input(rfile->input);
806                 default:
807                         return -EINVAL;
808                 }
809         }
810 #ifdef CONFIG_SND_DEBUG
811         default:
812                 snd_printk(KERN_WARNING "rawmidi: unknown command = 0x%x\n", cmd);
813 #endif
814         }
815         return -ENOTTY;
816 }
817
818 static int snd_rawmidi_control_ioctl(struct snd_card *card,
819                                      struct snd_ctl_file *control,
820                                      unsigned int cmd,
821                                      unsigned long arg)
822 {
823         void __user *argp = (void __user *)arg;
824
825         switch (cmd) {
826         case SNDRV_CTL_IOCTL_RAWMIDI_NEXT_DEVICE:
827         {
828                 int device;
829                 
830                 if (get_user(device, (int __user *)argp))
831                         return -EFAULT;
832                 mutex_lock(&register_mutex);
833                 device = device < 0 ? 0 : device + 1;
834                 while (device < SNDRV_RAWMIDI_DEVICES) {
835                         if (snd_rawmidi_search(card, device))
836                                 break;
837                         device++;
838                 }
839                 if (device == SNDRV_RAWMIDI_DEVICES)
840                         device = -1;
841                 mutex_unlock(&register_mutex);
842                 if (put_user(device, (int __user *)argp))
843                         return -EFAULT;
844                 return 0;
845         }
846         case SNDRV_CTL_IOCTL_RAWMIDI_PREFER_SUBDEVICE:
847         {
848                 int val;
849                 
850                 if (get_user(val, (int __user *)argp))
851                         return -EFAULT;
852                 control->prefer_rawmidi_subdevice = val;
853                 return 0;
854         }
855         case SNDRV_CTL_IOCTL_RAWMIDI_INFO:
856                 return snd_rawmidi_info_select_user(card, argp);
857         }
858         return -ENOIOCTLCMD;
859 }
860
861 /**
862  * snd_rawmidi_receive - receive the input data from the device
863  * @substream: the rawmidi substream
864  * @buffer: the buffer pointer
865  * @count: the data size to read
866  *
867  * Reads the data from the internal buffer.
868  *
869  * Returns the size of read data, or a negative error code on failure.
870  */
871 int snd_rawmidi_receive(struct snd_rawmidi_substream *substream,
872                         const unsigned char *buffer, int count)
873 {
874         unsigned long flags;
875         int result = 0, count1;
876         struct snd_rawmidi_runtime *runtime = substream->runtime;
877
878         if (!substream->opened)
879                 return -EBADFD;
880         if (runtime->buffer == NULL) {
881                 snd_printd("snd_rawmidi_receive: input is not active!!!\n");
882                 return -EINVAL;
883         }
884         spin_lock_irqsave(&runtime->lock, flags);
885         if (count == 1) {       /* special case, faster code */
886                 substream->bytes++;
887                 if (runtime->avail < runtime->buffer_size) {
888                         runtime->buffer[runtime->hw_ptr++] = buffer[0];
889                         runtime->hw_ptr %= runtime->buffer_size;
890                         runtime->avail++;
891                         result++;
892                 } else {
893                         runtime->xruns++;
894                 }
895         } else {
896                 substream->bytes += count;
897                 count1 = runtime->buffer_size - runtime->hw_ptr;
898                 if (count1 > count)
899                         count1 = count;
900                 if (count1 > (int)(runtime->buffer_size - runtime->avail))
901                         count1 = runtime->buffer_size - runtime->avail;
902                 memcpy(runtime->buffer + runtime->hw_ptr, buffer, count1);
903                 runtime->hw_ptr += count1;
904                 runtime->hw_ptr %= runtime->buffer_size;
905                 runtime->avail += count1;
906                 count -= count1;
907                 result += count1;
908                 if (count > 0) {
909                         buffer += count1;
910                         count1 = count;
911                         if (count1 > (int)(runtime->buffer_size - runtime->avail)) {
912                                 count1 = runtime->buffer_size - runtime->avail;
913                                 runtime->xruns += count - count1;
914                         }
915                         if (count1 > 0) {
916                                 memcpy(runtime->buffer, buffer, count1);
917                                 runtime->hw_ptr = count1;
918                                 runtime->avail += count1;
919                                 result += count1;
920                         }
921                 }
922         }
923         if (result > 0) {
924                 if (runtime->event)
925                         tasklet_schedule(&runtime->tasklet);
926                 else if (snd_rawmidi_ready(substream))
927                         wake_up(&runtime->sleep);
928         }
929         spin_unlock_irqrestore(&runtime->lock, flags);
930         return result;
931 }
932
933 static long snd_rawmidi_kernel_read1(struct snd_rawmidi_substream *substream,
934                                      unsigned char __user *userbuf,
935                                      unsigned char *kernelbuf, long count)
936 {
937         unsigned long flags;
938         long result = 0, count1;
939         struct snd_rawmidi_runtime *runtime = substream->runtime;
940
941         while (count > 0 && runtime->avail) {
942                 count1 = runtime->buffer_size - runtime->appl_ptr;
943                 if (count1 > count)
944                         count1 = count;
945                 spin_lock_irqsave(&runtime->lock, flags);
946                 if (count1 > (int)runtime->avail)
947                         count1 = runtime->avail;
948                 if (kernelbuf)
949                         memcpy(kernelbuf + result, runtime->buffer + runtime->appl_ptr, count1);
950                 if (userbuf) {
951                         spin_unlock_irqrestore(&runtime->lock, flags);
952                         if (copy_to_user(userbuf + result,
953                                          runtime->buffer + runtime->appl_ptr, count1)) {
954                                 return result > 0 ? result : -EFAULT;
955                         }
956                         spin_lock_irqsave(&runtime->lock, flags);
957                 }
958                 runtime->appl_ptr += count1;
959                 runtime->appl_ptr %= runtime->buffer_size;
960                 runtime->avail -= count1;
961                 spin_unlock_irqrestore(&runtime->lock, flags);
962                 result += count1;
963                 count -= count1;
964         }
965         return result;
966 }
967
968 long snd_rawmidi_kernel_read(struct snd_rawmidi_substream *substream,
969                              unsigned char *buf, long count)
970 {
971         snd_rawmidi_input_trigger(substream, 1);
972         return snd_rawmidi_kernel_read1(substream, NULL/*userbuf*/, buf, count);
973 }
974
975 static ssize_t snd_rawmidi_read(struct file *file, char __user *buf, size_t count,
976                                 loff_t *offset)
977 {
978         long result;
979         int count1;
980         struct snd_rawmidi_file *rfile;
981         struct snd_rawmidi_substream *substream;
982         struct snd_rawmidi_runtime *runtime;
983
984         rfile = file->private_data;
985         substream = rfile->input;
986         if (substream == NULL)
987                 return -EIO;
988         runtime = substream->runtime;
989         snd_rawmidi_input_trigger(substream, 1);
990         result = 0;
991         while (count > 0) {
992                 spin_lock_irq(&runtime->lock);
993                 while (!snd_rawmidi_ready(substream)) {
994                         wait_queue_t wait;
995                         if ((file->f_flags & O_NONBLOCK) != 0 || result > 0) {
996                                 spin_unlock_irq(&runtime->lock);
997                                 return result > 0 ? result : -EAGAIN;
998                         }
999                         init_waitqueue_entry(&wait, current);
1000                         add_wait_queue(&runtime->sleep, &wait);
1001                         set_current_state(TASK_INTERRUPTIBLE);
1002                         spin_unlock_irq(&runtime->lock);
1003                         schedule();
1004                         remove_wait_queue(&runtime->sleep, &wait);
1005                         if (signal_pending(current))
1006                                 return result > 0 ? result : -ERESTARTSYS;
1007                         if (!runtime->avail)
1008                                 return result > 0 ? result : -EIO;
1009                         spin_lock_irq(&runtime->lock);
1010                 }
1011                 spin_unlock_irq(&runtime->lock);
1012                 count1 = snd_rawmidi_kernel_read1(substream,
1013                                                   (unsigned char __user *)buf,
1014                                                   NULL/*kernelbuf*/,
1015                                                   count);
1016                 if (count1 < 0)
1017                         return result > 0 ? result : count1;
1018                 result += count1;
1019                 buf += count1;
1020                 count -= count1;
1021         }
1022         return result;
1023 }
1024
1025 /**
1026  * snd_rawmidi_transmit_empty - check whether the output buffer is empty
1027  * @substream: the rawmidi substream
1028  * 
1029  * Returns 1 if the internal output buffer is empty, 0 if not.
1030  */
1031 int snd_rawmidi_transmit_empty(struct snd_rawmidi_substream *substream)
1032 {
1033         struct snd_rawmidi_runtime *runtime = substream->runtime;
1034         int result;
1035         unsigned long flags;
1036
1037         if (runtime->buffer == NULL) {
1038                 snd_printd("snd_rawmidi_transmit_empty: output is not active!!!\n");
1039                 return 1;
1040         }
1041         spin_lock_irqsave(&runtime->lock, flags);
1042         result = runtime->avail >= runtime->buffer_size;
1043         spin_unlock_irqrestore(&runtime->lock, flags);
1044         return result;          
1045 }
1046
1047 /**
1048  * snd_rawmidi_transmit_peek - copy data from the internal buffer
1049  * @substream: the rawmidi substream
1050  * @buffer: the buffer pointer
1051  * @count: data size to transfer
1052  *
1053  * Copies data from the internal output buffer to the given buffer.
1054  *
1055  * Call this in the interrupt handler when the midi output is ready,
1056  * and call snd_rawmidi_transmit_ack() after the transmission is
1057  * finished.
1058  *
1059  * Returns the size of copied data, or a negative error code on failure.
1060  */
1061 int snd_rawmidi_transmit_peek(struct snd_rawmidi_substream *substream,
1062                               unsigned char *buffer, int count)
1063 {
1064         unsigned long flags;
1065         int result, count1;
1066         struct snd_rawmidi_runtime *runtime = substream->runtime;
1067
1068         if (runtime->buffer == NULL) {
1069                 snd_printd("snd_rawmidi_transmit_peek: output is not active!!!\n");
1070                 return -EINVAL;
1071         }
1072         result = 0;
1073         spin_lock_irqsave(&runtime->lock, flags);
1074         if (runtime->avail >= runtime->buffer_size) {
1075                 /* warning: lowlevel layer MUST trigger down the hardware */
1076                 goto __skip;
1077         }
1078         if (count == 1) {       /* special case, faster code */
1079                 *buffer = runtime->buffer[runtime->hw_ptr];
1080                 result++;
1081         } else {
1082                 count1 = runtime->buffer_size - runtime->hw_ptr;
1083                 if (count1 > count)
1084                         count1 = count;
1085                 if (count1 > (int)(runtime->buffer_size - runtime->avail))
1086                         count1 = runtime->buffer_size - runtime->avail;
1087                 memcpy(buffer, runtime->buffer + runtime->hw_ptr, count1);
1088                 count -= count1;
1089                 result += count1;
1090                 if (count > 0) {
1091                         if (count > (int)(runtime->buffer_size - runtime->avail - count1))
1092                                 count = runtime->buffer_size - runtime->avail - count1;
1093                         memcpy(buffer + count1, runtime->buffer, count);
1094                         result += count;
1095                 }
1096         }
1097       __skip:
1098         spin_unlock_irqrestore(&runtime->lock, flags);
1099         return result;
1100 }
1101
1102 /**
1103  * snd_rawmidi_transmit_ack - acknowledge the transmission
1104  * @substream: the rawmidi substream
1105  * @count: the tranferred count
1106  *
1107  * Advances the hardware pointer for the internal output buffer with
1108  * the given size and updates the condition.
1109  * Call after the transmission is finished.
1110  *
1111  * Returns the advanced size if successful, or a negative error code on failure.
1112  */
1113 int snd_rawmidi_transmit_ack(struct snd_rawmidi_substream *substream, int count)
1114 {
1115         unsigned long flags;
1116         struct snd_rawmidi_runtime *runtime = substream->runtime;
1117
1118         if (runtime->buffer == NULL) {
1119                 snd_printd("snd_rawmidi_transmit_ack: output is not active!!!\n");
1120                 return -EINVAL;
1121         }
1122         spin_lock_irqsave(&runtime->lock, flags);
1123         snd_BUG_ON(runtime->avail + count > runtime->buffer_size);
1124         runtime->hw_ptr += count;
1125         runtime->hw_ptr %= runtime->buffer_size;
1126         runtime->avail += count;
1127         substream->bytes += count;
1128         if (count > 0) {
1129                 if (runtime->drain || snd_rawmidi_ready(substream))
1130                         wake_up(&runtime->sleep);
1131         }
1132         spin_unlock_irqrestore(&runtime->lock, flags);
1133         return count;
1134 }
1135
1136 /**
1137  * snd_rawmidi_transmit - copy from the buffer to the device
1138  * @substream: the rawmidi substream
1139  * @buffer: the buffer pointer
1140  * @count: the data size to transfer
1141  * 
1142  * Copies data from the buffer to the device and advances the pointer.
1143  *
1144  * Returns the copied size if successful, or a negative error code on failure.
1145  */
1146 int snd_rawmidi_transmit(struct snd_rawmidi_substream *substream,
1147                          unsigned char *buffer, int count)
1148 {
1149         if (!substream->opened)
1150                 return -EBADFD;
1151         count = snd_rawmidi_transmit_peek(substream, buffer, count);
1152         if (count < 0)
1153                 return count;
1154         return snd_rawmidi_transmit_ack(substream, count);
1155 }
1156
1157 static long snd_rawmidi_kernel_write1(struct snd_rawmidi_substream *substream,
1158                                       const unsigned char __user *userbuf,
1159                                       const unsigned char *kernelbuf,
1160                                       long count)
1161 {
1162         unsigned long flags;
1163         long count1, result;
1164         struct snd_rawmidi_runtime *runtime = substream->runtime;
1165
1166         if (snd_BUG_ON(!kernelbuf && !userbuf))
1167                 return -EINVAL;
1168         if (snd_BUG_ON(!runtime->buffer))
1169                 return -EINVAL;
1170
1171         result = 0;
1172         spin_lock_irqsave(&runtime->lock, flags);
1173         if (substream->append) {
1174                 if ((long)runtime->avail < count) {
1175                         spin_unlock_irqrestore(&runtime->lock, flags);
1176                         return -EAGAIN;
1177                 }
1178         }
1179         while (count > 0 && runtime->avail > 0) {
1180                 count1 = runtime->buffer_size - runtime->appl_ptr;
1181                 if (count1 > count)
1182                         count1 = count;
1183                 if (count1 > (long)runtime->avail)
1184                         count1 = runtime->avail;
1185                 if (kernelbuf)
1186                         memcpy(runtime->buffer + runtime->appl_ptr,
1187                                kernelbuf + result, count1);
1188                 else if (userbuf) {
1189                         spin_unlock_irqrestore(&runtime->lock, flags);
1190                         if (copy_from_user(runtime->buffer + runtime->appl_ptr,
1191                                            userbuf + result, count1)) {
1192                                 spin_lock_irqsave(&runtime->lock, flags);
1193                                 result = result > 0 ? result : -EFAULT;
1194                                 goto __end;
1195                         }
1196                         spin_lock_irqsave(&runtime->lock, flags);
1197                 }
1198                 runtime->appl_ptr += count1;
1199                 runtime->appl_ptr %= runtime->buffer_size;
1200                 runtime->avail -= count1;
1201                 result += count1;
1202                 count -= count1;
1203         }
1204       __end:
1205         count1 = runtime->avail < runtime->buffer_size;
1206         spin_unlock_irqrestore(&runtime->lock, flags);
1207         if (count1)
1208                 snd_rawmidi_output_trigger(substream, 1);
1209         return result;
1210 }
1211
1212 long snd_rawmidi_kernel_write(struct snd_rawmidi_substream *substream,
1213                               const unsigned char *buf, long count)
1214 {
1215         return snd_rawmidi_kernel_write1(substream, NULL, buf, count);
1216 }
1217
1218 static ssize_t snd_rawmidi_write(struct file *file, const char __user *buf,
1219                                  size_t count, loff_t *offset)
1220 {
1221         long result, timeout;
1222         int count1;
1223         struct snd_rawmidi_file *rfile;
1224         struct snd_rawmidi_runtime *runtime;
1225         struct snd_rawmidi_substream *substream;
1226
1227         rfile = file->private_data;
1228         substream = rfile->output;
1229         runtime = substream->runtime;
1230         /* we cannot put an atomic message to our buffer */
1231         if (substream->append && count > runtime->buffer_size)
1232                 return -EIO;
1233         result = 0;
1234         while (count > 0) {
1235                 spin_lock_irq(&runtime->lock);
1236                 while (!snd_rawmidi_ready_append(substream, count)) {
1237                         wait_queue_t wait;
1238                         if (file->f_flags & O_NONBLOCK) {
1239                                 spin_unlock_irq(&runtime->lock);
1240                                 return result > 0 ? result : -EAGAIN;
1241                         }
1242                         init_waitqueue_entry(&wait, current);
1243                         add_wait_queue(&runtime->sleep, &wait);
1244                         set_current_state(TASK_INTERRUPTIBLE);
1245                         spin_unlock_irq(&runtime->lock);
1246                         timeout = schedule_timeout(30 * HZ);
1247                         remove_wait_queue(&runtime->sleep, &wait);
1248                         if (signal_pending(current))
1249                                 return result > 0 ? result : -ERESTARTSYS;
1250                         if (!runtime->avail && !timeout)
1251                                 return result > 0 ? result : -EIO;
1252                         spin_lock_irq(&runtime->lock);
1253                 }
1254                 spin_unlock_irq(&runtime->lock);
1255                 count1 = snd_rawmidi_kernel_write1(substream, buf, NULL, count);
1256                 if (count1 < 0)
1257                         return result > 0 ? result : count1;
1258                 result += count1;
1259                 buf += count1;
1260                 if ((size_t)count1 < count && (file->f_flags & O_NONBLOCK))
1261                         break;
1262                 count -= count1;
1263         }
1264         if (file->f_flags & O_DSYNC) {
1265                 spin_lock_irq(&runtime->lock);
1266                 while (runtime->avail != runtime->buffer_size) {
1267                         wait_queue_t wait;
1268                         unsigned int last_avail = runtime->avail;
1269                         init_waitqueue_entry(&wait, current);
1270                         add_wait_queue(&runtime->sleep, &wait);
1271                         set_current_state(TASK_INTERRUPTIBLE);
1272                         spin_unlock_irq(&runtime->lock);
1273                         timeout = schedule_timeout(30 * HZ);
1274                         remove_wait_queue(&runtime->sleep, &wait);
1275                         if (signal_pending(current))
1276                                 return result > 0 ? result : -ERESTARTSYS;
1277                         if (runtime->avail == last_avail && !timeout)
1278                                 return result > 0 ? result : -EIO;
1279                         spin_lock_irq(&runtime->lock);
1280                 }
1281                 spin_unlock_irq(&runtime->lock);
1282         }
1283         return result;
1284 }
1285
1286 static unsigned int snd_rawmidi_poll(struct file *file, poll_table * wait)
1287 {
1288         struct snd_rawmidi_file *rfile;
1289         struct snd_rawmidi_runtime *runtime;
1290         unsigned int mask;
1291
1292         rfile = file->private_data;
1293         if (rfile->input != NULL) {
1294                 runtime = rfile->input->runtime;
1295                 snd_rawmidi_input_trigger(rfile->input, 1);
1296                 poll_wait(file, &runtime->sleep, wait);
1297         }
1298         if (rfile->output != NULL) {
1299                 runtime = rfile->output->runtime;
1300                 poll_wait(file, &runtime->sleep, wait);
1301         }
1302         mask = 0;
1303         if (rfile->input != NULL) {
1304                 if (snd_rawmidi_ready(rfile->input))
1305                         mask |= POLLIN | POLLRDNORM;
1306         }
1307         if (rfile->output != NULL) {
1308                 if (snd_rawmidi_ready(rfile->output))
1309                         mask |= POLLOUT | POLLWRNORM;
1310         }
1311         return mask;
1312 }
1313
1314 /*
1315  */
1316 #ifdef CONFIG_COMPAT
1317 #include "rawmidi_compat.c"
1318 #else
1319 #define snd_rawmidi_ioctl_compat        NULL
1320 #endif
1321
1322 /*
1323
1324  */
1325
1326 static void snd_rawmidi_proc_info_read(struct snd_info_entry *entry,
1327                                        struct snd_info_buffer *buffer)
1328 {
1329         struct snd_rawmidi *rmidi;
1330         struct snd_rawmidi_substream *substream;
1331         struct snd_rawmidi_runtime *runtime;
1332
1333         rmidi = entry->private_data;
1334         snd_iprintf(buffer, "%s\n\n", rmidi->name);
1335         mutex_lock(&rmidi->open_mutex);
1336         if (rmidi->info_flags & SNDRV_RAWMIDI_INFO_OUTPUT) {
1337                 list_for_each_entry(substream,
1338                                     &rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substreams,
1339                                     list) {
1340                         snd_iprintf(buffer,
1341                                     "Output %d\n"
1342                                     "  Tx bytes     : %lu\n",
1343                                     substream->number,
1344                                     (unsigned long) substream->bytes);
1345                         if (substream->opened) {
1346                                 snd_iprintf(buffer,
1347                                     "  Owner PID    : %d\n",
1348                                     pid_vnr(substream->pid));
1349                                 runtime = substream->runtime;
1350                                 snd_iprintf(buffer,
1351                                     "  Mode         : %s\n"
1352                                     "  Buffer size  : %lu\n"
1353                                     "  Avail        : %lu\n",
1354                                     runtime->oss ? "OSS compatible" : "native",
1355                                     (unsigned long) runtime->buffer_size,
1356                                     (unsigned long) runtime->avail);
1357                         }
1358                 }
1359         }
1360         if (rmidi->info_flags & SNDRV_RAWMIDI_INFO_INPUT) {
1361                 list_for_each_entry(substream,
1362                                     &rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substreams,
1363                                     list) {
1364                         snd_iprintf(buffer,
1365                                     "Input %d\n"
1366                                     "  Rx bytes     : %lu\n",
1367                                     substream->number,
1368                                     (unsigned long) substream->bytes);
1369                         if (substream->opened) {
1370                                 snd_iprintf(buffer,
1371                                             "  Owner PID    : %d\n",
1372                                             pid_vnr(substream->pid));
1373                                 runtime = substream->runtime;
1374                                 snd_iprintf(buffer,
1375                                             "  Buffer size  : %lu\n"
1376                                             "  Avail        : %lu\n"
1377                                             "  Overruns     : %lu\n",
1378                                             (unsigned long) runtime->buffer_size,
1379                                             (unsigned long) runtime->avail,
1380                                             (unsigned long) runtime->xruns);
1381                         }
1382                 }
1383         }
1384         mutex_unlock(&rmidi->open_mutex);
1385 }
1386
1387 /*
1388  *  Register functions
1389  */
1390
1391 static const struct file_operations snd_rawmidi_f_ops =
1392 {
1393         .owner =        THIS_MODULE,
1394         .read =         snd_rawmidi_read,
1395         .write =        snd_rawmidi_write,
1396         .open =         snd_rawmidi_open,
1397         .release =      snd_rawmidi_release,
1398         .llseek =       no_llseek,
1399         .poll =         snd_rawmidi_poll,
1400         .unlocked_ioctl =       snd_rawmidi_ioctl,
1401         .compat_ioctl = snd_rawmidi_ioctl_compat,
1402 };
1403
1404 static int snd_rawmidi_alloc_substreams(struct snd_rawmidi *rmidi,
1405                                         struct snd_rawmidi_str *stream,
1406                                         int direction,
1407                                         int count)
1408 {
1409         struct snd_rawmidi_substream *substream;
1410         int idx;
1411
1412         for (idx = 0; idx < count; idx++) {
1413                 substream = kzalloc(sizeof(*substream), GFP_KERNEL);
1414                 if (substream == NULL) {
1415                         snd_printk(KERN_ERR "rawmidi: cannot allocate substream\n");
1416                         return -ENOMEM;
1417                 }
1418                 substream->stream = direction;
1419                 substream->number = idx;
1420                 substream->rmidi = rmidi;
1421                 substream->pstr = stream;
1422                 list_add_tail(&substream->list, &stream->substreams);
1423                 stream->substream_count++;
1424         }
1425         return 0;
1426 }
1427
1428 /**
1429  * snd_rawmidi_new - create a rawmidi instance
1430  * @card: the card instance
1431  * @id: the id string
1432  * @device: the device index
1433  * @output_count: the number of output streams
1434  * @input_count: the number of input streams
1435  * @rrawmidi: the pointer to store the new rawmidi instance
1436  *
1437  * Creates a new rawmidi instance.
1438  * Use snd_rawmidi_set_ops() to set the operators to the new instance.
1439  *
1440  * Returns zero if successful, or a negative error code on failure.
1441  */
1442 int snd_rawmidi_new(struct snd_card *card, char *id, int device,
1443                     int output_count, int input_count,
1444                     struct snd_rawmidi ** rrawmidi)
1445 {
1446         struct snd_rawmidi *rmidi;
1447         int err;
1448         static struct snd_device_ops ops = {
1449                 .dev_free = snd_rawmidi_dev_free,
1450                 .dev_register = snd_rawmidi_dev_register,
1451                 .dev_disconnect = snd_rawmidi_dev_disconnect,
1452         };
1453
1454         if (snd_BUG_ON(!card))
1455                 return -ENXIO;
1456         if (rrawmidi)
1457                 *rrawmidi = NULL;
1458         rmidi = kzalloc(sizeof(*rmidi), GFP_KERNEL);
1459         if (rmidi == NULL) {
1460                 snd_printk(KERN_ERR "rawmidi: cannot allocate\n");
1461                 return -ENOMEM;
1462         }
1463         rmidi->card = card;
1464         rmidi->device = device;
1465         mutex_init(&rmidi->open_mutex);
1466         init_waitqueue_head(&rmidi->open_wait);
1467         INIT_LIST_HEAD(&rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substreams);
1468         INIT_LIST_HEAD(&rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substreams);
1469
1470         if (id != NULL)
1471                 strlcpy(rmidi->id, id, sizeof(rmidi->id));
1472         if ((err = snd_rawmidi_alloc_substreams(rmidi,
1473                                                 &rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT],
1474                                                 SNDRV_RAWMIDI_STREAM_INPUT,
1475                                                 input_count)) < 0) {
1476                 snd_rawmidi_free(rmidi);
1477                 return err;
1478         }
1479         if ((err = snd_rawmidi_alloc_substreams(rmidi,
1480                                                 &rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT],
1481                                                 SNDRV_RAWMIDI_STREAM_OUTPUT,
1482                                                 output_count)) < 0) {
1483                 snd_rawmidi_free(rmidi);
1484                 return err;
1485         }
1486         if ((err = snd_device_new(card, SNDRV_DEV_RAWMIDI, rmidi, &ops)) < 0) {
1487                 snd_rawmidi_free(rmidi);
1488                 return err;
1489         }
1490         if (rrawmidi)
1491                 *rrawmidi = rmidi;
1492         return 0;
1493 }
1494
1495 static void snd_rawmidi_free_substreams(struct snd_rawmidi_str *stream)
1496 {
1497         struct snd_rawmidi_substream *substream;
1498
1499         while (!list_empty(&stream->substreams)) {
1500                 substream = list_entry(stream->substreams.next, struct snd_rawmidi_substream, list);
1501                 list_del(&substream->list);
1502                 kfree(substream);
1503         }
1504 }
1505
1506 static int snd_rawmidi_free(struct snd_rawmidi *rmidi)
1507 {
1508         if (!rmidi)
1509                 return 0;
1510
1511         snd_info_free_entry(rmidi->proc_entry);
1512         rmidi->proc_entry = NULL;
1513         mutex_lock(&register_mutex);
1514         if (rmidi->ops && rmidi->ops->dev_unregister)
1515                 rmidi->ops->dev_unregister(rmidi);
1516         mutex_unlock(&register_mutex);
1517
1518         snd_rawmidi_free_substreams(&rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT]);
1519         snd_rawmidi_free_substreams(&rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT]);
1520         if (rmidi->private_free)
1521                 rmidi->private_free(rmidi);
1522         kfree(rmidi);
1523         return 0;
1524 }
1525
1526 static int snd_rawmidi_dev_free(struct snd_device *device)
1527 {
1528         struct snd_rawmidi *rmidi = device->device_data;
1529         return snd_rawmidi_free(rmidi);
1530 }
1531
1532 #if defined(CONFIG_SND_SEQUENCER) || (defined(MODULE) && defined(CONFIG_SND_SEQUENCER_MODULE))
1533 static void snd_rawmidi_dev_seq_free(struct snd_seq_device *device)
1534 {
1535         struct snd_rawmidi *rmidi = device->private_data;
1536         rmidi->seq_dev = NULL;
1537 }
1538 #endif
1539
1540 static int snd_rawmidi_dev_register(struct snd_device *device)
1541 {
1542         int err;
1543         struct snd_info_entry *entry;
1544         char name[16];
1545         struct snd_rawmidi *rmidi = device->device_data;
1546
1547         if (rmidi->device >= SNDRV_RAWMIDI_DEVICES)
1548                 return -ENOMEM;
1549         mutex_lock(&register_mutex);
1550         if (snd_rawmidi_search(rmidi->card, rmidi->device)) {
1551                 mutex_unlock(&register_mutex);
1552                 return -EBUSY;
1553         }
1554         list_add_tail(&rmidi->list, &snd_rawmidi_devices);
1555         sprintf(name, "midiC%iD%i", rmidi->card->number, rmidi->device);
1556         if ((err = snd_register_device(SNDRV_DEVICE_TYPE_RAWMIDI,
1557                                        rmidi->card, rmidi->device,
1558                                        &snd_rawmidi_f_ops, rmidi, name)) < 0) {
1559                 snd_printk(KERN_ERR "unable to register rawmidi device %i:%i\n", rmidi->card->number, rmidi->device);
1560                 list_del(&rmidi->list);
1561                 mutex_unlock(&register_mutex);
1562                 return err;
1563         }
1564         if (rmidi->ops && rmidi->ops->dev_register &&
1565             (err = rmidi->ops->dev_register(rmidi)) < 0) {
1566                 snd_unregister_device(SNDRV_DEVICE_TYPE_RAWMIDI, rmidi->card, rmidi->device);
1567                 list_del(&rmidi->list);
1568                 mutex_unlock(&register_mutex);
1569                 return err;
1570         }
1571 #ifdef CONFIG_SND_OSSEMUL
1572         rmidi->ossreg = 0;
1573         if ((int)rmidi->device == midi_map[rmidi->card->number]) {
1574                 if (snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_MIDI,
1575                                             rmidi->card, 0, &snd_rawmidi_f_ops,
1576                                             rmidi, name) < 0) {
1577                         snd_printk(KERN_ERR "unable to register OSS rawmidi device %i:%i\n", rmidi->card->number, 0);
1578                 } else {
1579                         rmidi->ossreg++;
1580 #ifdef SNDRV_OSS_INFO_DEV_MIDI
1581                         snd_oss_info_register(SNDRV_OSS_INFO_DEV_MIDI, rmidi->card->number, rmidi->name);
1582 #endif
1583                 }
1584         }
1585         if ((int)rmidi->device == amidi_map[rmidi->card->number]) {
1586                 if (snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_MIDI,
1587                                             rmidi->card, 1, &snd_rawmidi_f_ops,
1588                                             rmidi, name) < 0) {
1589                         snd_printk(KERN_ERR "unable to register OSS rawmidi device %i:%i\n", rmidi->card->number, 1);
1590                 } else {
1591                         rmidi->ossreg++;
1592                 }
1593         }
1594 #endif /* CONFIG_SND_OSSEMUL */
1595         mutex_unlock(&register_mutex);
1596         sprintf(name, "midi%d", rmidi->device);
1597         entry = snd_info_create_card_entry(rmidi->card, name, rmidi->card->proc_root);
1598         if (entry) {
1599                 entry->private_data = rmidi;
1600                 entry->c.text.read = snd_rawmidi_proc_info_read;
1601                 if (snd_info_register(entry) < 0) {
1602                         snd_info_free_entry(entry);
1603                         entry = NULL;
1604                 }
1605         }
1606         rmidi->proc_entry = entry;
1607 #if defined(CONFIG_SND_SEQUENCER) || (defined(MODULE) && defined(CONFIG_SND_SEQUENCER_MODULE))
1608         if (!rmidi->ops || !rmidi->ops->dev_register) { /* own registration mechanism */
1609                 if (snd_seq_device_new(rmidi->card, rmidi->device, SNDRV_SEQ_DEV_ID_MIDISYNTH, 0, &rmidi->seq_dev) >= 0) {
1610                         rmidi->seq_dev->private_data = rmidi;
1611                         rmidi->seq_dev->private_free = snd_rawmidi_dev_seq_free;
1612                         sprintf(rmidi->seq_dev->name, "MIDI %d-%d", rmidi->card->number, rmidi->device);
1613                         snd_device_register(rmidi->card, rmidi->seq_dev);
1614                 }
1615         }
1616 #endif
1617         return 0;
1618 }
1619
1620 static int snd_rawmidi_dev_disconnect(struct snd_device *device)
1621 {
1622         struct snd_rawmidi *rmidi = device->device_data;
1623
1624         mutex_lock(&register_mutex);
1625         list_del_init(&rmidi->list);
1626 #ifdef CONFIG_SND_OSSEMUL
1627         if (rmidi->ossreg) {
1628                 if ((int)rmidi->device == midi_map[rmidi->card->number]) {
1629                         snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_MIDI, rmidi->card, 0);
1630 #ifdef SNDRV_OSS_INFO_DEV_MIDI
1631                         snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_MIDI, rmidi->card->number);
1632 #endif
1633                 }
1634                 if ((int)rmidi->device == amidi_map[rmidi->card->number])
1635                         snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_MIDI, rmidi->card, 1);
1636                 rmidi->ossreg = 0;
1637         }
1638 #endif /* CONFIG_SND_OSSEMUL */
1639         snd_unregister_device(SNDRV_DEVICE_TYPE_RAWMIDI, rmidi->card, rmidi->device);
1640         mutex_unlock(&register_mutex);
1641         return 0;
1642 }
1643
1644 /**
1645  * snd_rawmidi_set_ops - set the rawmidi operators
1646  * @rmidi: the rawmidi instance
1647  * @stream: the stream direction, SNDRV_RAWMIDI_STREAM_XXX
1648  * @ops: the operator table
1649  *
1650  * Sets the rawmidi operators for the given stream direction.
1651  */
1652 void snd_rawmidi_set_ops(struct snd_rawmidi *rmidi, int stream,
1653                          struct snd_rawmidi_ops *ops)
1654 {
1655         struct snd_rawmidi_substream *substream;
1656         
1657         list_for_each_entry(substream, &rmidi->streams[stream].substreams, list)
1658                 substream->ops = ops;
1659 }
1660
1661 /*
1662  *  ENTRY functions
1663  */
1664
1665 static int __init alsa_rawmidi_init(void)
1666 {
1667
1668         snd_ctl_register_ioctl(snd_rawmidi_control_ioctl);
1669         snd_ctl_register_ioctl_compat(snd_rawmidi_control_ioctl);
1670 #ifdef CONFIG_SND_OSSEMUL
1671         { int i;
1672         /* check device map table */
1673         for (i = 0; i < SNDRV_CARDS; i++) {
1674                 if (midi_map[i] < 0 || midi_map[i] >= SNDRV_RAWMIDI_DEVICES) {
1675                         snd_printk(KERN_ERR "invalid midi_map[%d] = %d\n", i, midi_map[i]);
1676                         midi_map[i] = 0;
1677                 }
1678                 if (amidi_map[i] < 0 || amidi_map[i] >= SNDRV_RAWMIDI_DEVICES) {
1679                         snd_printk(KERN_ERR "invalid amidi_map[%d] = %d\n", i, amidi_map[i]);
1680                         amidi_map[i] = 1;
1681                 }
1682         }
1683         }
1684 #endif /* CONFIG_SND_OSSEMUL */
1685         return 0;
1686 }
1687
1688 static void __exit alsa_rawmidi_exit(void)
1689 {
1690         snd_ctl_unregister_ioctl(snd_rawmidi_control_ioctl);
1691         snd_ctl_unregister_ioctl_compat(snd_rawmidi_control_ioctl);
1692 }
1693
1694 module_init(alsa_rawmidi_init)
1695 module_exit(alsa_rawmidi_exit)
1696
1697 EXPORT_SYMBOL(snd_rawmidi_output_params);
1698 EXPORT_SYMBOL(snd_rawmidi_input_params);
1699 EXPORT_SYMBOL(snd_rawmidi_drop_output);
1700 EXPORT_SYMBOL(snd_rawmidi_drain_output);
1701 EXPORT_SYMBOL(snd_rawmidi_drain_input);
1702 EXPORT_SYMBOL(snd_rawmidi_receive);
1703 EXPORT_SYMBOL(snd_rawmidi_transmit_empty);
1704 EXPORT_SYMBOL(snd_rawmidi_transmit_peek);
1705 EXPORT_SYMBOL(snd_rawmidi_transmit_ack);
1706 EXPORT_SYMBOL(snd_rawmidi_transmit);
1707 EXPORT_SYMBOL(snd_rawmidi_new);
1708 EXPORT_SYMBOL(snd_rawmidi_set_ops);
1709 EXPORT_SYMBOL(snd_rawmidi_info_select);
1710 EXPORT_SYMBOL(snd_rawmidi_kernel_open);
1711 EXPORT_SYMBOL(snd_rawmidi_kernel_release);
1712 EXPORT_SYMBOL(snd_rawmidi_kernel_read);
1713 EXPORT_SYMBOL(snd_rawmidi_kernel_write);