[ALSA] Remove xxx_t typedefs: Raw MIDI
[linux-2.6.git] / sound / core / rawmidi.c
1 /*
2  *  Abstract layer for MIDI v1.0 stream
3  *  Copyright (c) by Jaroslav Kysela <perex@suse.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/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>
39
40 MODULE_AUTHOR("Jaroslav Kysela <perex@suse.cz>");
41 MODULE_DESCRIPTION("Midlevel RawMidi code for ALSA.");
42 MODULE_LICENSE("GPL");
43
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 */
52
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);
58
59 static struct snd_rawmidi *snd_rawmidi_devices[SNDRV_CARDS * SNDRV_RAWMIDI_DEVICES];
60
61 static DECLARE_MUTEX(register_mutex);
62
63 static inline unsigned short snd_rawmidi_file_flags(struct file *file)
64 {
65         switch (file->f_mode & (FMODE_READ | FMODE_WRITE)) {
66         case FMODE_WRITE:
67                 return SNDRV_RAWMIDI_LFLG_OUTPUT;
68         case FMODE_READ:
69                 return SNDRV_RAWMIDI_LFLG_INPUT;
70         default:
71                 return SNDRV_RAWMIDI_LFLG_OPEN;
72         }
73 }
74
75 static inline int snd_rawmidi_ready(struct snd_rawmidi_substream *substream)
76 {
77         struct snd_rawmidi_runtime *runtime = substream->runtime;
78         return runtime->avail >= runtime->avail_min;
79 }
80
81 static inline int snd_rawmidi_ready_append(struct snd_rawmidi_substream *substream,
82                                            size_t count)
83 {
84         struct snd_rawmidi_runtime *runtime = substream->runtime;
85         return runtime->avail >= runtime->avail_min &&
86                (!substream->append || runtime->avail >= count);
87 }
88
89 static void snd_rawmidi_input_event_tasklet(unsigned long data)
90 {
91         struct snd_rawmidi_substream *substream = (struct snd_rawmidi_substream *)data;
92         substream->runtime->event(substream);
93 }
94
95 static void snd_rawmidi_output_trigger_tasklet(unsigned long data)
96 {
97         struct snd_rawmidi_substream *substream = (struct snd_rawmidi_substream *)data;
98         substream->ops->trigger(substream, 1);
99 }
100
101 static int snd_rawmidi_runtime_create(struct snd_rawmidi_substream *substream)
102 {
103         struct snd_rawmidi_runtime *runtime;
104
105         if ((runtime = kzalloc(sizeof(*runtime), GFP_KERNEL)) == NULL)
106                 return -ENOMEM;
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);
113         else
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)
121                 runtime->avail = 0;
122         else
123                 runtime->avail = runtime->buffer_size;
124         if ((runtime->buffer = kmalloc(runtime->buffer_size, GFP_KERNEL)) == NULL) {
125                 kfree(runtime);
126                 return -ENOMEM;
127         }
128         runtime->appl_ptr = runtime->hw_ptr = 0;
129         substream->runtime = runtime;
130         return 0;
131 }
132
133 static int snd_rawmidi_runtime_free(struct snd_rawmidi_substream *substream)
134 {
135         struct snd_rawmidi_runtime *runtime = substream->runtime;
136
137         kfree(runtime->buffer);
138         kfree(runtime);
139         substream->runtime = NULL;
140         return 0;
141 }
142
143 static inline void snd_rawmidi_output_trigger(struct snd_rawmidi_substream *substream,int up)
144 {
145         if (up) {
146                 tasklet_hi_schedule(&substream->runtime->tasklet);
147         } else {
148                 tasklet_kill(&substream->runtime->tasklet);
149                 substream->ops->trigger(substream, 0);
150         }
151 }
152
153 static void snd_rawmidi_input_trigger(struct snd_rawmidi_substream *substream, int up)
154 {
155         substream->ops->trigger(substream, up);
156         if (!up && substream->runtime->event)
157                 tasklet_kill(&substream->runtime->tasklet);
158 }
159
160 int snd_rawmidi_drop_output(struct snd_rawmidi_substream *substream)
161 {
162         unsigned long flags;
163         struct snd_rawmidi_runtime *runtime = substream->runtime;
164
165         snd_rawmidi_output_trigger(substream, 0);
166         runtime->drain = 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);
171         return 0;
172 }
173
174 int snd_rawmidi_drain_output(struct snd_rawmidi_substream *substream)
175 {
176         int err;
177         long timeout;
178         struct snd_rawmidi_runtime *runtime = substream->runtime;
179
180         err = 0;
181         runtime->drain = 1;
182         timeout = wait_event_interruptible_timeout(runtime->sleep,
183                                 (runtime->avail >= runtime->buffer_size),
184                                 10*HZ);
185         if (signal_pending(current))
186                 err = -ERESTARTSYS;
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);
189                 err = -EIO;
190         }
191         runtime->drain = 0;
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);
196                 else
197                         msleep(50);
198                 snd_rawmidi_drop_output(substream);
199         }
200         return err;
201 }
202
203 int snd_rawmidi_drain_input(struct snd_rawmidi_substream *substream)
204 {
205         unsigned long flags;
206         struct snd_rawmidi_runtime *runtime = substream->runtime;
207
208         snd_rawmidi_input_trigger(substream, 0);
209         runtime->drain = 0;
210         spin_lock_irqsave(&runtime->lock, flags);
211         runtime->appl_ptr = runtime->hw_ptr = 0;
212         runtime->avail = 0;
213         spin_unlock_irqrestore(&runtime->lock, flags);
214         return 0;
215 }
216
217 int snd_rawmidi_kernel_open(int cardnum, int device, int subdevice,
218                             int mode, struct snd_rawmidi_file * rfile)
219 {
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;
224         int err;
225
226         if (rfile)
227                 rfile->input = rfile->output = NULL;
228         rmidi = snd_rawmidi_devices[(cardnum * SNDRV_RAWMIDI_DEVICES) + device];
229         if (rmidi == NULL) {
230                 err = -ENODEV;
231                 goto __error1;
232         }
233         if (!try_module_get(rmidi->card->module)) {
234                 err = -EFAULT;
235                 goto __error1;
236         }
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)) {
241                         err = -ENXIO;
242                         goto __error;
243                 }
244                 if (subdevice >= 0 && (unsigned int)subdevice >= rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substream_count) {
245                         err = -ENODEV;
246                         goto __error;
247                 }
248                 if (rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substream_opened >=
249                     rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substream_count) {
250                         err = -EAGAIN;
251                         goto __error;
252                 }
253         }
254         if (mode & SNDRV_RAWMIDI_LFLG_OUTPUT) {
255                 if (!(rmidi->info_flags & SNDRV_RAWMIDI_INFO_OUTPUT)) {
256                         err = -ENXIO;
257                         goto __error;
258                 }
259                 if (subdevice >= 0 && (unsigned int)subdevice >= rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substream_count) {
260                         err = -ENODEV;
261                         goto __error;
262                 }
263                 if (rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substream_opened >=
264                     rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substream_count) {
265                         err = -EAGAIN;
266                         goto __error;
267                 }
268         }
269         list1 = rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substreams.next;
270         while (1) {
271                 if (list1 == &rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substreams) {
272                         sinput = NULL;
273                         if (mode & SNDRV_RAWMIDI_LFLG_INPUT) {
274                                 err = -EAGAIN;
275                                 goto __error;
276                         }
277                         break;
278                 }
279                 sinput = list_entry(list1, struct snd_rawmidi_substream, list);
280                 if ((mode & SNDRV_RAWMIDI_LFLG_INPUT) && sinput->opened)
281                         goto __nexti;
282                 if (subdevice < 0 || (subdevice >= 0 && subdevice == sinput->number))
283                         break;
284               __nexti:
285                 list1 = list1->next;
286         }
287         list2 = rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substreams.next;
288         while (1) {
289                 if (list2 == &rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substreams) {
290                         soutput = NULL;
291                         if (mode & SNDRV_RAWMIDI_LFLG_OUTPUT) {
292                                 err = -EAGAIN;
293                                 goto __error;
294                         }
295                         break;
296                 }
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)
301                                         goto __nexto;
302                         } else {
303                                 if (soutput->opened)
304                                         goto __nexto;
305                         }
306                 }
307                 if (subdevice < 0 || (subdevice >= 0 && subdevice == soutput->number))
308                         break;
309               __nexto:
310                 list2 = list2->next;
311         }
312         if (mode & SNDRV_RAWMIDI_LFLG_INPUT) {
313                 if ((err = snd_rawmidi_runtime_create(sinput)) < 0)
314                         goto __error;
315                 input = sinput->runtime;
316                 if ((err = sinput->ops->open(sinput)) < 0)
317                         goto __error;
318                 sinput->opened = 1;
319                 rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substream_opened++;
320         } else {
321                 sinput = NULL;
322         }
323         if (mode & SNDRV_RAWMIDI_LFLG_OUTPUT) {
324                 if (soutput->opened)
325                         goto __skip_output;
326                 if ((err = snd_rawmidi_runtime_create(soutput)) < 0) {
327                         if (mode & SNDRV_RAWMIDI_LFLG_INPUT)
328                                 sinput->ops->close(sinput);
329                         goto __error;
330                 }
331                 output = soutput->runtime;
332                 if ((err = soutput->ops->open(soutput)) < 0) {
333                         if (mode & SNDRV_RAWMIDI_LFLG_INPUT)
334                                 sinput->ops->close(sinput);
335                         goto __error;
336                 }
337               __skip_output:
338                 soutput->opened = 1;
339                 if (mode & SNDRV_RAWMIDI_LFLG_APPEND)
340                         soutput->append = 1;
341                 if (soutput->use_count++ == 0)
342                         soutput->active_sensing = 1;
343                 rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substream_opened++;
344         } else {
345                 soutput = NULL;
346         }
347         if (!(mode & SNDRV_RAWMIDI_LFLG_NOOPENLOCK))
348                 up(&rmidi->open_mutex);
349         if (rfile) {
350                 rfile->rmidi = rmidi;
351                 rfile->input = sinput;
352                 rfile->output = soutput;
353         }
354         return 0;
355
356       __error:
357         if (input != NULL)
358                 snd_rawmidi_runtime_free(sinput);
359         if (output != NULL)
360                 snd_rawmidi_runtime_free(soutput);
361         module_put(rmidi->card->module);
362         if (!(mode & SNDRV_RAWMIDI_LFLG_NOOPENLOCK))
363                 up(&rmidi->open_mutex);
364       __error1:
365         return err;
366 }
367
368 static int snd_rawmidi_open(struct inode *inode, struct file *file)
369 {
370         int maj = imajor(inode);
371         int cardnum;
372         struct snd_card *card;
373         int device, subdevice;
374         unsigned short fflags;
375         int err;
376         struct snd_rawmidi *rmidi;
377         struct snd_rawmidi_file *rawmidi_file;
378         wait_queue_t wait;
379         struct list_head *list;
380         struct snd_ctl_file *kctl;
381
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];
393 #endif
394         } else
395                 return -ENXIO;
396
397         rmidi = snd_rawmidi_devices[(cardnum * SNDRV_RAWMIDI_DEVICES) + device];
398         if (rmidi == NULL)
399                 return -ENODEV;
400 #ifdef CONFIG_SND_OSSEMUL
401         if (maj == SOUND_MAJOR && !rmidi->ossreg)
402                 return -ENXIO;
403 #endif
404         if ((file->f_flags & O_APPEND) && !(file->f_flags & O_NONBLOCK)) 
405                 return -EINVAL;         /* invalid combination */
406         card = rmidi->card;
407         err = snd_card_file_add(card, file);
408         if (err < 0)
409                 return -ENODEV;
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);
417                 return -ENOMEM;
418         }
419         init_waitqueue_entry(&wait, current);
420         add_wait_queue(&rmidi->open_wait, &wait);
421         down(&rmidi->open_mutex);
422         while (1) {
423                 subdevice = -1;
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;
429                                 break;
430                         }
431                 }
432                 up_read(&card->controls_rwsem);
433                 err = snd_rawmidi_kernel_open(cardnum, device, subdevice, fflags, rawmidi_file);
434                 if (err >= 0)
435                         break;
436                 if (err == -EAGAIN) {
437                         if (file->f_flags & O_NONBLOCK) {
438                                 err = -EBUSY;
439                                 break;
440                         }
441                 } else
442                         break;
443                 set_current_state(TASK_INTERRUPTIBLE);
444                 up(&rmidi->open_mutex);
445                 schedule();
446                 down(&rmidi->open_mutex);
447                 if (signal_pending(current)) {
448                         err = -ERESTARTSYS;
449                         break;
450                 }
451         }
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);
457 #endif
458         remove_wait_queue(&rmidi->open_wait, &wait);
459         if (err >= 0) {
460                 file->private_data = rawmidi_file;
461         } else {
462                 snd_card_file_remove(card, file);
463                 kfree(rawmidi_file);
464         }
465         up(&rmidi->open_mutex);
466         return err;
467 }
468
469 int snd_rawmidi_kernel_release(struct snd_rawmidi_file * rfile)
470 {
471         struct snd_rawmidi *rmidi;
472         struct snd_rawmidi_substream *substream;
473         struct snd_rawmidi_runtime *runtime;
474
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;
481                 rfile->input = NULL;
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--;
490         }
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);
500                         }
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;
509                 }
510                 rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substream_opened--;
511         }
512         up(&rmidi->open_mutex);
513         module_put(rmidi->card->module);
514         return 0;
515 }
516
517 static int snd_rawmidi_release(struct inode *inode, struct file *file)
518 {
519         struct snd_rawmidi_file *rfile;
520         struct snd_rawmidi *rmidi;
521         int err;
522
523         rfile = file->private_data;
524         err = snd_rawmidi_kernel_release(rfile);
525         rmidi = rfile->rmidi;
526         wake_up(&rmidi->open_wait);
527         kfree(rfile);
528         snd_card_file_remove(rmidi->card, file);
529         return err;
530 }
531
532 int snd_rawmidi_info(struct snd_rawmidi_substream *substream,
533                      struct snd_rawmidi_info *info)
534 {
535         struct snd_rawmidi *rmidi;
536         
537         if (substream == NULL)
538                 return -ENODEV;
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);
552         return 0;
553 }
554
555 static int snd_rawmidi_info_user(struct snd_rawmidi_substream *substream,
556                                  struct snd_rawmidi_info __user * _info)
557 {
558         struct snd_rawmidi_info info;
559         int err;
560         if ((err = snd_rawmidi_info(substream, &info)) < 0)
561                 return err;
562         if (copy_to_user(_info, &info, sizeof(struct snd_rawmidi_info)))
563                 return -EFAULT;
564         return 0;
565 }
566
567 int snd_rawmidi_info_select(struct snd_card *card, struct snd_rawmidi_info *info)
568 {
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)
574                 return -ENXIO;
575         rmidi = snd_rawmidi_devices[card->number * SNDRV_RAWMIDI_DEVICES + info->device];
576         if (info->stream < 0 || info->stream > 1)
577                 return -EINVAL;
578         pstr = &rmidi->streams[info->stream];
579         if (pstr->substream_count == 0)
580                 return -ENOENT;
581         if (info->subdevice >= pstr->substream_count)
582                 return -ENXIO;
583         list_for_each(list, &pstr->substreams) {
584                 substream = list_entry(list, struct snd_rawmidi_substream, list);
585                 if ((unsigned int)substream->number == info->subdevice)
586                         return snd_rawmidi_info(substream, info);
587         }
588         return -ENXIO;
589 }
590
591 static int snd_rawmidi_info_select_user(struct snd_card *card,
592                                         struct snd_rawmidi_info __user *_info)
593 {
594         int err;
595         struct snd_rawmidi_info info;
596         if (get_user(info.device, &_info->device))
597                 return -EFAULT;
598         if (get_user(info.stream, &_info->stream))
599                 return -EFAULT;
600         if (get_user(info.subdevice, &_info->subdevice))
601                 return -EFAULT;
602         if ((err = snd_rawmidi_info_select(card, &info)) < 0)
603                 return err;
604         if (copy_to_user(_info, &info, sizeof(struct snd_rawmidi_info)))
605                 return -EFAULT;
606         return 0;
607 }
608
609 int snd_rawmidi_output_params(struct snd_rawmidi_substream *substream,
610                               struct snd_rawmidi_params * params)
611 {
612         char *newbuf;
613         struct snd_rawmidi_runtime *runtime = substream->runtime;
614         
615         if (substream->append && substream->use_count > 1)
616                 return -EBUSY;
617         snd_rawmidi_drain_output(substream);
618         if (params->buffer_size < 32 || params->buffer_size > 1024L * 1024L) {
619                 return -EINVAL;
620         }
621         if (params->avail_min < 1 || params->avail_min > params->buffer_size) {
622                 return -EINVAL;
623         }
624         if (params->buffer_size != runtime->buffer_size) {
625                 if ((newbuf = (char *) kmalloc(params->buffer_size, GFP_KERNEL)) == NULL)
626                         return -ENOMEM;
627                 kfree(runtime->buffer);
628                 runtime->buffer = newbuf;
629                 runtime->buffer_size = params->buffer_size;
630         }
631         runtime->avail_min = params->avail_min;
632         substream->active_sensing = !params->no_active_sensing;
633         return 0;
634 }
635
636 int snd_rawmidi_input_params(struct snd_rawmidi_substream *substream,
637                              struct snd_rawmidi_params * params)
638 {
639         char *newbuf;
640         struct snd_rawmidi_runtime *runtime = substream->runtime;
641
642         snd_rawmidi_drain_input(substream);
643         if (params->buffer_size < 32 || params->buffer_size > 1024L * 1024L) {
644                 return -EINVAL;
645         }
646         if (params->avail_min < 1 || params->avail_min > params->buffer_size) {
647                 return -EINVAL;
648         }
649         if (params->buffer_size != runtime->buffer_size) {
650                 if ((newbuf = (char *) kmalloc(params->buffer_size, GFP_KERNEL)) == NULL)
651                         return -ENOMEM;
652                 kfree(runtime->buffer);
653                 runtime->buffer = newbuf;
654                 runtime->buffer_size = params->buffer_size;
655         }
656         runtime->avail_min = params->avail_min;
657         return 0;
658 }
659
660 static int snd_rawmidi_output_status(struct snd_rawmidi_substream *substream,
661                                      struct snd_rawmidi_status * status)
662 {
663         struct snd_rawmidi_runtime *runtime = substream->runtime;
664
665         memset(status, 0, sizeof(*status));
666         status->stream = SNDRV_RAWMIDI_STREAM_OUTPUT;
667         spin_lock_irq(&runtime->lock);
668         status->avail = runtime->avail;
669         spin_unlock_irq(&runtime->lock);
670         return 0;
671 }
672
673 static int snd_rawmidi_input_status(struct snd_rawmidi_substream *substream,
674                                     struct snd_rawmidi_status * status)
675 {
676         struct snd_rawmidi_runtime *runtime = substream->runtime;
677
678         memset(status, 0, sizeof(*status));
679         status->stream = SNDRV_RAWMIDI_STREAM_INPUT;
680         spin_lock_irq(&runtime->lock);
681         status->avail = runtime->avail;
682         status->xruns = runtime->xruns;
683         runtime->xruns = 0;
684         spin_unlock_irq(&runtime->lock);
685         return 0;
686 }
687
688 static long snd_rawmidi_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
689 {
690         struct snd_rawmidi_file *rfile;
691         void __user *argp = (void __user *)arg;
692
693         rfile = file->private_data;
694         if (((cmd >> 8) & 0xff) != 'W')
695                 return -ENOTTY;
696         switch (cmd) {
697         case SNDRV_RAWMIDI_IOCTL_PVERSION:
698                 return put_user(SNDRV_RAWMIDI_VERSION, (int __user *)argp) ? -EFAULT : 0;
699         case SNDRV_RAWMIDI_IOCTL_INFO:
700         {
701                 int stream;
702                 struct snd_rawmidi_info __user *info = argp;
703                 if (get_user(stream, &info->stream))
704                         return -EFAULT;
705                 switch (stream) {
706                 case SNDRV_RAWMIDI_STREAM_INPUT:
707                         return snd_rawmidi_info_user(rfile->input, info);
708                 case SNDRV_RAWMIDI_STREAM_OUTPUT:
709                         return snd_rawmidi_info_user(rfile->output, info);
710                 default:
711                         return -EINVAL;
712                 }
713         }
714         case SNDRV_RAWMIDI_IOCTL_PARAMS:
715         {
716                 struct snd_rawmidi_params params;
717                 if (copy_from_user(&params, argp, sizeof(struct snd_rawmidi_params)))
718                         return -EFAULT;
719                 switch (params.stream) {
720                 case SNDRV_RAWMIDI_STREAM_OUTPUT:
721                         if (rfile->output == NULL)
722                                 return -EINVAL;
723                         return snd_rawmidi_output_params(rfile->output, &params);
724                 case SNDRV_RAWMIDI_STREAM_INPUT:
725                         if (rfile->input == NULL)
726                                 return -EINVAL;
727                         return snd_rawmidi_input_params(rfile->input, &params);
728                 default:
729                         return -EINVAL;
730                 }
731         }
732         case SNDRV_RAWMIDI_IOCTL_STATUS:
733         {
734                 int err = 0;
735                 struct snd_rawmidi_status status;
736                 if (copy_from_user(&status, argp, sizeof(struct snd_rawmidi_status)))
737                         return -EFAULT;
738                 switch (status.stream) {
739                 case SNDRV_RAWMIDI_STREAM_OUTPUT:
740                         if (rfile->output == NULL)
741                                 return -EINVAL;
742                         err = snd_rawmidi_output_status(rfile->output, &status);
743                         break;
744                 case SNDRV_RAWMIDI_STREAM_INPUT:
745                         if (rfile->input == NULL)
746                                 return -EINVAL;
747                         err = snd_rawmidi_input_status(rfile->input, &status);
748                         break;
749                 default:
750                         return -EINVAL;
751                 }
752                 if (err < 0)
753                         return err;
754                 if (copy_to_user(argp, &status, sizeof(struct snd_rawmidi_status)))
755                         return -EFAULT;
756                 return 0;
757         }
758         case SNDRV_RAWMIDI_IOCTL_DROP:
759         {
760                 int val;
761                 if (get_user(val, (int __user *) argp))
762                         return -EFAULT;
763                 switch (val) {
764                 case SNDRV_RAWMIDI_STREAM_OUTPUT:
765                         if (rfile->output == NULL)
766                                 return -EINVAL;
767                         return snd_rawmidi_drop_output(rfile->output);
768                 default:
769                         return -EINVAL;
770                 }
771         }
772         case SNDRV_RAWMIDI_IOCTL_DRAIN:
773         {
774                 int val;
775                 if (get_user(val, (int __user *) argp))
776                         return -EFAULT;
777                 switch (val) {
778                 case SNDRV_RAWMIDI_STREAM_OUTPUT:
779                         if (rfile->output == NULL)
780                                 return -EINVAL;
781                         return snd_rawmidi_drain_output(rfile->output);
782                 case SNDRV_RAWMIDI_STREAM_INPUT:
783                         if (rfile->input == NULL)
784                                 return -EINVAL;
785                         return snd_rawmidi_drain_input(rfile->input);
786                 default:
787                         return -EINVAL;
788                 }
789         }
790 #ifdef CONFIG_SND_DEBUG
791         default:
792                 snd_printk(KERN_WARNING "rawmidi: unknown command = 0x%x\n", cmd);
793 #endif
794         }
795         return -ENOTTY;
796 }
797
798 static int snd_rawmidi_control_ioctl(struct snd_card *card,
799                                      struct snd_ctl_file *control,
800                                      unsigned int cmd,
801                                      unsigned long arg)
802 {
803         void __user *argp = (void __user *)arg;
804         unsigned int tmp;
805
806         tmp = card->number * SNDRV_RAWMIDI_DEVICES;
807         switch (cmd) {
808         case SNDRV_CTL_IOCTL_RAWMIDI_NEXT_DEVICE:
809         {
810                 int device;
811                 
812                 if (get_user(device, (int __user *)argp))
813                         return -EFAULT;
814                 device = device < 0 ? 0 : device + 1;
815                 while (device < SNDRV_RAWMIDI_DEVICES) {
816                         if (snd_rawmidi_devices[tmp + device])
817                                 break;
818                         device++;
819                 }
820                 if (device == SNDRV_RAWMIDI_DEVICES)
821                         device = -1;
822                 if (put_user(device, (int __user *)argp))
823                         return -EFAULT;
824                 return 0;
825         }
826         case SNDRV_CTL_IOCTL_RAWMIDI_PREFER_SUBDEVICE:
827         {
828                 int val;
829                 
830                 if (get_user(val, (int __user *)argp))
831                         return -EFAULT;
832                 control->prefer_rawmidi_subdevice = val;
833                 return 0;
834         }
835         case SNDRV_CTL_IOCTL_RAWMIDI_INFO:
836                 return snd_rawmidi_info_select_user(card, argp);
837         }
838         return -ENOIOCTLCMD;
839 }
840
841 /**
842  * snd_rawmidi_receive - receive the input data from the device
843  * @substream: the rawmidi substream
844  * @buffer: the buffer pointer
845  * @count: the data size to read
846  *
847  * Reads the data from the internal buffer.
848  *
849  * Returns the size of read data, or a negative error code on failure.
850  */
851 int snd_rawmidi_receive(struct snd_rawmidi_substream *substream,
852                         const unsigned char *buffer, int count)
853 {
854         unsigned long flags;
855         int result = 0, count1;
856         struct snd_rawmidi_runtime *runtime = substream->runtime;
857
858         if (runtime->buffer == NULL) {
859                 snd_printd("snd_rawmidi_receive: input is not active!!!\n");
860                 return -EINVAL;
861         }
862         spin_lock_irqsave(&runtime->lock, flags);
863         if (count == 1) {       /* special case, faster code */
864                 substream->bytes++;
865                 if (runtime->avail < runtime->buffer_size) {
866                         runtime->buffer[runtime->hw_ptr++] = buffer[0];
867                         runtime->hw_ptr %= runtime->buffer_size;
868                         runtime->avail++;
869                         result++;
870                 } else {
871                         runtime->xruns++;
872                 }
873         } else {
874                 substream->bytes += count;
875                 count1 = runtime->buffer_size - runtime->hw_ptr;
876                 if (count1 > count)
877                         count1 = count;
878                 if (count1 > (int)(runtime->buffer_size - runtime->avail))
879                         count1 = runtime->buffer_size - runtime->avail;
880                 memcpy(runtime->buffer + runtime->hw_ptr, buffer, count1);
881                 runtime->hw_ptr += count1;
882                 runtime->hw_ptr %= runtime->buffer_size;
883                 runtime->avail += count1;
884                 count -= count1;
885                 result += count1;
886                 if (count > 0) {
887                         buffer += count1;
888                         count1 = count;
889                         if (count1 > (int)(runtime->buffer_size - runtime->avail)) {
890                                 count1 = runtime->buffer_size - runtime->avail;
891                                 runtime->xruns += count - count1;
892                         }
893                         if (count1 > 0) {
894                                 memcpy(runtime->buffer, buffer, count1);
895                                 runtime->hw_ptr = count1;
896                                 runtime->avail += count1;
897                                 result += count1;
898                         }
899                 }
900         }
901         if (result > 0) {
902                 if (runtime->event)
903                         tasklet_hi_schedule(&runtime->tasklet);
904                 else if (snd_rawmidi_ready(substream))
905                         wake_up(&runtime->sleep);
906         }
907         spin_unlock_irqrestore(&runtime->lock, flags);
908         return result;
909 }
910
911 static long snd_rawmidi_kernel_read1(struct snd_rawmidi_substream *substream,
912                                      unsigned char *buf, long count, int kernel)
913 {
914         unsigned long flags;
915         long result = 0, count1;
916         struct snd_rawmidi_runtime *runtime = substream->runtime;
917
918         while (count > 0 && runtime->avail) {
919                 count1 = runtime->buffer_size - runtime->appl_ptr;
920                 if (count1 > count)
921                         count1 = count;
922                 spin_lock_irqsave(&runtime->lock, flags);
923                 if (count1 > (int)runtime->avail)
924                         count1 = runtime->avail;
925                 if (kernel) {
926                         memcpy(buf + result, runtime->buffer + runtime->appl_ptr, count1);
927                 } else {
928                         spin_unlock_irqrestore(&runtime->lock, flags);
929                         if (copy_to_user((char __user *)buf + result,
930                                          runtime->buffer + runtime->appl_ptr, count1)) {
931                                 return result > 0 ? result : -EFAULT;
932                         }
933                         spin_lock_irqsave(&runtime->lock, flags);
934                 }
935                 runtime->appl_ptr += count1;
936                 runtime->appl_ptr %= runtime->buffer_size;
937                 runtime->avail -= count1;
938                 spin_unlock_irqrestore(&runtime->lock, flags);
939                 result += count1;
940                 count -= count1;
941         }
942         return result;
943 }
944
945 long snd_rawmidi_kernel_read(struct snd_rawmidi_substream *substream,
946                              unsigned char *buf, long count)
947 {
948         snd_rawmidi_input_trigger(substream, 1);
949         return snd_rawmidi_kernel_read1(substream, buf, count, 1);
950 }
951
952 static ssize_t snd_rawmidi_read(struct file *file, char __user *buf, size_t count,
953                                 loff_t *offset)
954 {
955         long result;
956         int count1;
957         struct snd_rawmidi_file *rfile;
958         struct snd_rawmidi_substream *substream;
959         struct snd_rawmidi_runtime *runtime;
960
961         rfile = file->private_data;
962         substream = rfile->input;
963         if (substream == NULL)
964                 return -EIO;
965         runtime = substream->runtime;
966         snd_rawmidi_input_trigger(substream, 1);
967         result = 0;
968         while (count > 0) {
969                 spin_lock_irq(&runtime->lock);
970                 while (!snd_rawmidi_ready(substream)) {
971                         wait_queue_t wait;
972                         if ((file->f_flags & O_NONBLOCK) != 0 || result > 0) {
973                                 spin_unlock_irq(&runtime->lock);
974                                 return result > 0 ? result : -EAGAIN;
975                         }
976                         init_waitqueue_entry(&wait, current);
977                         add_wait_queue(&runtime->sleep, &wait);
978                         set_current_state(TASK_INTERRUPTIBLE);
979                         spin_unlock_irq(&runtime->lock);
980                         schedule();
981                         remove_wait_queue(&runtime->sleep, &wait);
982                         if (signal_pending(current))
983                                 return result > 0 ? result : -ERESTARTSYS;
984                         if (!runtime->avail)
985                                 return result > 0 ? result : -EIO;
986                         spin_lock_irq(&runtime->lock);
987                 }
988                 spin_unlock_irq(&runtime->lock);
989                 count1 = snd_rawmidi_kernel_read1(substream,
990                                                   (unsigned char __force *)buf,
991                                                   count, 0);
992                 if (count1 < 0)
993                         return result > 0 ? result : count1;
994                 result += count1;
995                 buf += count1;
996                 count -= count1;
997         }
998         return result;
999 }
1000
1001 /**
1002  * snd_rawmidi_transmit_empty - check whether the output buffer is empty
1003  * @substream: the rawmidi substream
1004  * 
1005  * Returns 1 if the internal output buffer is empty, 0 if not.
1006  */
1007 int snd_rawmidi_transmit_empty(struct snd_rawmidi_substream *substream)
1008 {
1009         struct snd_rawmidi_runtime *runtime = substream->runtime;
1010         int result;
1011         unsigned long flags;
1012
1013         if (runtime->buffer == NULL) {
1014                 snd_printd("snd_rawmidi_transmit_empty: output is not active!!!\n");
1015                 return 1;
1016         }
1017         spin_lock_irqsave(&runtime->lock, flags);
1018         result = runtime->avail >= runtime->buffer_size;
1019         spin_unlock_irqrestore(&runtime->lock, flags);
1020         return result;          
1021 }
1022
1023 /**
1024  * snd_rawmidi_transmit_peek - copy data from the internal buffer
1025  * @substream: the rawmidi substream
1026  * @buffer: the buffer pointer
1027  * @count: data size to transfer
1028  *
1029  * Copies data from the internal output buffer to the given buffer.
1030  *
1031  * Call this in the interrupt handler when the midi output is ready,
1032  * and call snd_rawmidi_transmit_ack() after the transmission is
1033  * finished.
1034  *
1035  * Returns the size of copied data, or a negative error code on failure.
1036  */
1037 int snd_rawmidi_transmit_peek(struct snd_rawmidi_substream *substream,
1038                               unsigned char *buffer, int count)
1039 {
1040         unsigned long flags;
1041         int result, count1;
1042         struct snd_rawmidi_runtime *runtime = substream->runtime;
1043
1044         if (runtime->buffer == NULL) {
1045                 snd_printd("snd_rawmidi_transmit_peek: output is not active!!!\n");
1046                 return -EINVAL;
1047         }
1048         result = 0;
1049         spin_lock_irqsave(&runtime->lock, flags);
1050         if (runtime->avail >= runtime->buffer_size) {
1051                 /* warning: lowlevel layer MUST trigger down the hardware */
1052                 goto __skip;
1053         }
1054         if (count == 1) {       /* special case, faster code */
1055                 *buffer = runtime->buffer[runtime->hw_ptr];
1056                 result++;
1057         } else {
1058                 count1 = runtime->buffer_size - runtime->hw_ptr;
1059                 if (count1 > count)
1060                         count1 = count;
1061                 if (count1 > (int)(runtime->buffer_size - runtime->avail))
1062                         count1 = runtime->buffer_size - runtime->avail;
1063                 memcpy(buffer, runtime->buffer + runtime->hw_ptr, count1);
1064                 count -= count1;
1065                 result += count1;
1066                 if (count > 0) {
1067                         if (count > (int)(runtime->buffer_size - runtime->avail - count1))
1068                                 count = runtime->buffer_size - runtime->avail - count1;
1069                         memcpy(buffer + count1, runtime->buffer, count);
1070                         result += count;
1071                 }
1072         }
1073       __skip:
1074         spin_unlock_irqrestore(&runtime->lock, flags);
1075         return result;
1076 }
1077
1078 /**
1079  * snd_rawmidi_transmit_ack - acknowledge the transmission
1080  * @substream: the rawmidi substream
1081  * @count: the tranferred count
1082  *
1083  * Advances the hardware pointer for the internal output buffer with
1084  * the given size and updates the condition.
1085  * Call after the transmission is finished.
1086  *
1087  * Returns the advanced size if successful, or a negative error code on failure.
1088  */
1089 int snd_rawmidi_transmit_ack(struct snd_rawmidi_substream *substream, int count)
1090 {
1091         unsigned long flags;
1092         struct snd_rawmidi_runtime *runtime = substream->runtime;
1093
1094         if (runtime->buffer == NULL) {
1095                 snd_printd("snd_rawmidi_transmit_ack: output is not active!!!\n");
1096                 return -EINVAL;
1097         }
1098         spin_lock_irqsave(&runtime->lock, flags);
1099         snd_assert(runtime->avail + count <= runtime->buffer_size, );
1100         runtime->hw_ptr += count;
1101         runtime->hw_ptr %= runtime->buffer_size;
1102         runtime->avail += count;
1103         substream->bytes += count;
1104         if (count > 0) {
1105                 if (runtime->drain || snd_rawmidi_ready(substream))
1106                         wake_up(&runtime->sleep);
1107         }
1108         spin_unlock_irqrestore(&runtime->lock, flags);
1109         return count;
1110 }
1111
1112 /**
1113  * snd_rawmidi_transmit - copy from the buffer to the device
1114  * @substream: the rawmidi substream
1115  * @buffer: the buffer pointer
1116  * @count: the data size to transfer
1117  * 
1118  * Copies data from the buffer to the device and advances the pointer.
1119  *
1120  * Returns the copied size if successful, or a negative error code on failure.
1121  */
1122 int snd_rawmidi_transmit(struct snd_rawmidi_substream *substream,
1123                          unsigned char *buffer, int count)
1124 {
1125         count = snd_rawmidi_transmit_peek(substream, buffer, count);
1126         if (count < 0)
1127                 return count;
1128         return snd_rawmidi_transmit_ack(substream, count);
1129 }
1130
1131 static long snd_rawmidi_kernel_write1(struct snd_rawmidi_substream *substream,
1132                                       const unsigned char *buf, long count, int kernel)
1133 {
1134         unsigned long flags;
1135         long count1, result;
1136         struct snd_rawmidi_runtime *runtime = substream->runtime;
1137
1138         snd_assert(buf != NULL, return -EINVAL);
1139         snd_assert(runtime->buffer != NULL, return -EINVAL);
1140
1141         result = 0;
1142         spin_lock_irqsave(&runtime->lock, flags);
1143         if (substream->append) {
1144                 if ((long)runtime->avail < count) {
1145                         spin_unlock_irqrestore(&runtime->lock, flags);
1146                         return -EAGAIN;
1147                 }
1148         }
1149         while (count > 0 && runtime->avail > 0) {
1150                 count1 = runtime->buffer_size - runtime->appl_ptr;
1151                 if (count1 > count)
1152                         count1 = count;
1153                 if (count1 > (long)runtime->avail)
1154                         count1 = runtime->avail;
1155                 if (kernel) {
1156                         memcpy(runtime->buffer + runtime->appl_ptr, buf, count1);
1157                 } else {
1158                         spin_unlock_irqrestore(&runtime->lock, flags);
1159                         if (copy_from_user(runtime->buffer + runtime->appl_ptr,
1160                                            (char __user *)buf, count1)) {
1161                                 spin_lock_irqsave(&runtime->lock, flags);
1162                                 result = result > 0 ? result : -EFAULT;
1163                                 goto __end;
1164                         }
1165                         spin_lock_irqsave(&runtime->lock, flags);
1166                 }
1167                 runtime->appl_ptr += count1;
1168                 runtime->appl_ptr %= runtime->buffer_size;
1169                 runtime->avail -= count1;
1170                 result += count1;
1171                 buf += count1;
1172                 count -= count1;
1173         }
1174       __end:
1175         count1 = runtime->avail < runtime->buffer_size;
1176         spin_unlock_irqrestore(&runtime->lock, flags);
1177         if (count1)
1178                 snd_rawmidi_output_trigger(substream, 1);
1179         return result;
1180 }
1181
1182 long snd_rawmidi_kernel_write(struct snd_rawmidi_substream *substream,
1183                               const unsigned char *buf, long count)
1184 {
1185         return snd_rawmidi_kernel_write1(substream, buf, count, 1);
1186 }
1187
1188 static ssize_t snd_rawmidi_write(struct file *file, const char __user *buf,
1189                                  size_t count, loff_t *offset)
1190 {
1191         long result, timeout;
1192         int count1;
1193         struct snd_rawmidi_file *rfile;
1194         struct snd_rawmidi_runtime *runtime;
1195         struct snd_rawmidi_substream *substream;
1196
1197         rfile = file->private_data;
1198         substream = rfile->output;
1199         runtime = substream->runtime;
1200         /* we cannot put an atomic message to our buffer */
1201         if (substream->append && count > runtime->buffer_size)
1202                 return -EIO;
1203         result = 0;
1204         while (count > 0) {
1205                 spin_lock_irq(&runtime->lock);
1206                 while (!snd_rawmidi_ready_append(substream, count)) {
1207                         wait_queue_t wait;
1208                         if (file->f_flags & O_NONBLOCK) {
1209                                 spin_unlock_irq(&runtime->lock);
1210                                 return result > 0 ? result : -EAGAIN;
1211                         }
1212                         init_waitqueue_entry(&wait, current);
1213                         add_wait_queue(&runtime->sleep, &wait);
1214                         set_current_state(TASK_INTERRUPTIBLE);
1215                         spin_unlock_irq(&runtime->lock);
1216                         timeout = schedule_timeout(30 * HZ);
1217                         remove_wait_queue(&runtime->sleep, &wait);
1218                         if (signal_pending(current))
1219                                 return result > 0 ? result : -ERESTARTSYS;
1220                         if (!runtime->avail && !timeout)
1221                                 return result > 0 ? result : -EIO;
1222                         spin_lock_irq(&runtime->lock);
1223                 }
1224                 spin_unlock_irq(&runtime->lock);
1225                 count1 = snd_rawmidi_kernel_write1(substream,
1226                                                    (unsigned char __force *)buf,
1227                                                    count, 0);
1228                 if (count1 < 0)
1229                         return result > 0 ? result : count1;
1230                 result += count1;
1231                 buf += count1;
1232                 if ((size_t)count1 < count && (file->f_flags & O_NONBLOCK))
1233                         break;
1234                 count -= count1;
1235         }
1236         if (file->f_flags & O_SYNC) {
1237                 spin_lock_irq(&runtime->lock);
1238                 while (runtime->avail != runtime->buffer_size) {
1239                         wait_queue_t wait;
1240                         unsigned int last_avail = runtime->avail;
1241                         init_waitqueue_entry(&wait, current);
1242                         add_wait_queue(&runtime->sleep, &wait);
1243                         set_current_state(TASK_INTERRUPTIBLE);
1244                         spin_unlock_irq(&runtime->lock);
1245                         timeout = schedule_timeout(30 * HZ);
1246                         remove_wait_queue(&runtime->sleep, &wait);
1247                         if (signal_pending(current))
1248                                 return result > 0 ? result : -ERESTARTSYS;
1249                         if (runtime->avail == last_avail && !timeout)
1250                                 return result > 0 ? result : -EIO;
1251                         spin_lock_irq(&runtime->lock);
1252                 }
1253                 spin_unlock_irq(&runtime->lock);
1254         }
1255         return result;
1256 }
1257
1258 static unsigned int snd_rawmidi_poll(struct file *file, poll_table * wait)
1259 {
1260         struct snd_rawmidi_file *rfile;
1261         struct snd_rawmidi_runtime *runtime;
1262         unsigned int mask;
1263
1264         rfile = file->private_data;
1265         if (rfile->input != NULL) {
1266                 runtime = rfile->input->runtime;
1267                 snd_rawmidi_input_trigger(rfile->input, 1);
1268                 poll_wait(file, &runtime->sleep, wait);
1269         }
1270         if (rfile->output != NULL) {
1271                 runtime = rfile->output->runtime;
1272                 poll_wait(file, &runtime->sleep, wait);
1273         }
1274         mask = 0;
1275         if (rfile->input != NULL) {
1276                 if (snd_rawmidi_ready(rfile->input))
1277                         mask |= POLLIN | POLLRDNORM;
1278         }
1279         if (rfile->output != NULL) {
1280                 if (snd_rawmidi_ready(rfile->output))
1281                         mask |= POLLOUT | POLLWRNORM;
1282         }
1283         return mask;
1284 }
1285
1286 /*
1287  */
1288 #ifdef CONFIG_COMPAT
1289 #include "rawmidi_compat.c"
1290 #else
1291 #define snd_rawmidi_ioctl_compat        NULL
1292 #endif
1293
1294 /*
1295
1296  */
1297
1298 static void snd_rawmidi_proc_info_read(struct snd_info_entry *entry,
1299                                        struct snd_info_buffer *buffer)
1300 {
1301         struct snd_rawmidi *rmidi;
1302         struct snd_rawmidi_substream *substream;
1303         struct snd_rawmidi_runtime *runtime;
1304         struct list_head *list;
1305
1306         rmidi = entry->private_data;
1307         snd_iprintf(buffer, "%s\n\n", rmidi->name);
1308         down(&rmidi->open_mutex);
1309         if (rmidi->info_flags & SNDRV_RAWMIDI_INFO_OUTPUT) {
1310                 list_for_each(list, &rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substreams) {
1311                         substream = list_entry(list, struct snd_rawmidi_substream, list);
1312                         snd_iprintf(buffer,
1313                                     "Output %d\n"
1314                                     "  Tx bytes     : %lu\n",
1315                                     substream->number,
1316                                     (unsigned long) substream->bytes);
1317                         if (substream->opened) {
1318                                 runtime = substream->runtime;
1319                                 snd_iprintf(buffer,
1320                                     "  Mode         : %s\n"
1321                                     "  Buffer size  : %lu\n"
1322                                     "  Avail        : %lu\n",
1323                                     runtime->oss ? "OSS compatible" : "native",
1324                                     (unsigned long) runtime->buffer_size,
1325                                     (unsigned long) runtime->avail);
1326                         }
1327                 }
1328         }
1329         if (rmidi->info_flags & SNDRV_RAWMIDI_INFO_INPUT) {
1330                 list_for_each(list, &rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substreams) {
1331                         substream = list_entry(list, struct snd_rawmidi_substream, list);
1332                         snd_iprintf(buffer,
1333                                     "Input %d\n"
1334                                     "  Rx bytes     : %lu\n",
1335                                     substream->number,
1336                                     (unsigned long) substream->bytes);
1337                         if (substream->opened) {
1338                                 runtime = substream->runtime;
1339                                 snd_iprintf(buffer,
1340                                             "  Buffer size  : %lu\n"
1341                                             "  Avail        : %lu\n"
1342                                             "  Overruns     : %lu\n",
1343                                             (unsigned long) runtime->buffer_size,
1344                                             (unsigned long) runtime->avail,
1345                                             (unsigned long) runtime->xruns);
1346                         }
1347                 }
1348         }
1349         up(&rmidi->open_mutex);
1350 }
1351
1352 /*
1353  *  Register functions
1354  */
1355
1356 static struct file_operations snd_rawmidi_f_ops =
1357 {
1358         .owner =        THIS_MODULE,
1359         .read =         snd_rawmidi_read,
1360         .write =        snd_rawmidi_write,
1361         .open =         snd_rawmidi_open,
1362         .release =      snd_rawmidi_release,
1363         .poll =         snd_rawmidi_poll,
1364         .unlocked_ioctl =       snd_rawmidi_ioctl,
1365         .compat_ioctl = snd_rawmidi_ioctl_compat,
1366 };
1367
1368 static struct snd_minor snd_rawmidi_reg =
1369 {
1370         .comment =      "raw midi",
1371         .f_ops =        &snd_rawmidi_f_ops,
1372 };
1373
1374 static int snd_rawmidi_alloc_substreams(struct snd_rawmidi *rmidi,
1375                                         struct snd_rawmidi_str *stream,
1376                                         int direction,
1377                                         int count)
1378 {
1379         struct snd_rawmidi_substream *substream;
1380         int idx;
1381
1382         INIT_LIST_HEAD(&stream->substreams);
1383         for (idx = 0; idx < count; idx++) {
1384                 substream = kzalloc(sizeof(*substream), GFP_KERNEL);
1385                 if (substream == NULL)
1386                         return -ENOMEM;
1387                 substream->stream = direction;
1388                 substream->number = idx;
1389                 substream->rmidi = rmidi;
1390                 substream->pstr = stream;
1391                 list_add_tail(&substream->list, &stream->substreams);
1392                 stream->substream_count++;
1393         }
1394         return 0;
1395 }
1396
1397 /**
1398  * snd_rawmidi_new - create a rawmidi instance
1399  * @card: the card instance
1400  * @id: the id string
1401  * @device: the device index
1402  * @output_count: the number of output streams
1403  * @input_count: the number of input streams
1404  * @rrawmidi: the pointer to store the new rawmidi instance
1405  *
1406  * Creates a new rawmidi instance.
1407  * Use snd_rawmidi_set_ops() to set the operators to the new instance.
1408  *
1409  * Returns zero if successful, or a negative error code on failure.
1410  */
1411 int snd_rawmidi_new(struct snd_card *card, char *id, int device,
1412                     int output_count, int input_count,
1413                     struct snd_rawmidi ** rrawmidi)
1414 {
1415         struct snd_rawmidi *rmidi;
1416         int err;
1417         static struct snd_device_ops ops = {
1418                 .dev_free = snd_rawmidi_dev_free,
1419                 .dev_register = snd_rawmidi_dev_register,
1420                 .dev_disconnect = snd_rawmidi_dev_disconnect,
1421                 .dev_unregister = snd_rawmidi_dev_unregister
1422         };
1423
1424         snd_assert(rrawmidi != NULL, return -EINVAL);
1425         *rrawmidi = NULL;
1426         snd_assert(card != NULL, return -ENXIO);
1427         rmidi = kzalloc(sizeof(*rmidi), GFP_KERNEL);
1428         if (rmidi == NULL)
1429                 return -ENOMEM;
1430         rmidi->card = card;
1431         rmidi->device = device;
1432         init_MUTEX(&rmidi->open_mutex);
1433         init_waitqueue_head(&rmidi->open_wait);
1434         if (id != NULL)
1435                 strlcpy(rmidi->id, id, sizeof(rmidi->id));
1436         if ((err = snd_rawmidi_alloc_substreams(rmidi, &rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT], SNDRV_RAWMIDI_STREAM_INPUT, input_count)) < 0) {
1437                 snd_rawmidi_free(rmidi);
1438                 return err;
1439         }
1440         if ((err = snd_rawmidi_alloc_substreams(rmidi, &rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT], SNDRV_RAWMIDI_STREAM_OUTPUT, output_count)) < 0) {
1441                 snd_rawmidi_free(rmidi);
1442                 return err;
1443         }
1444         if ((err = snd_device_new(card, SNDRV_DEV_RAWMIDI, rmidi, &ops)) < 0) {
1445                 snd_rawmidi_free(rmidi);
1446                 return err;
1447         }
1448         *rrawmidi = rmidi;
1449         return 0;
1450 }
1451
1452 static void snd_rawmidi_free_substreams(struct snd_rawmidi_str *stream)
1453 {
1454         struct snd_rawmidi_substream *substream;
1455
1456         while (!list_empty(&stream->substreams)) {
1457                 substream = list_entry(stream->substreams.next, struct snd_rawmidi_substream, list);
1458                 list_del(&substream->list);
1459                 kfree(substream);
1460         }
1461 }
1462
1463 static int snd_rawmidi_free(struct snd_rawmidi *rmidi)
1464 {
1465         snd_assert(rmidi != NULL, return -ENXIO);       
1466         snd_rawmidi_free_substreams(&rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT]);
1467         snd_rawmidi_free_substreams(&rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT]);
1468         if (rmidi->private_free)
1469                 rmidi->private_free(rmidi);
1470         kfree(rmidi);
1471         return 0;
1472 }
1473
1474 static int snd_rawmidi_dev_free(struct snd_device *device)
1475 {
1476         struct snd_rawmidi *rmidi = device->device_data;
1477         return snd_rawmidi_free(rmidi);
1478 }
1479
1480 #if defined(CONFIG_SND_SEQUENCER) || (defined(MODULE) && defined(CONFIG_SND_SEQUENCER_MODULE))
1481 static void snd_rawmidi_dev_seq_free(struct snd_seq_device *device)
1482 {
1483         struct snd_rawmidi *rmidi = device->private_data;
1484         rmidi->seq_dev = NULL;
1485 }
1486 #endif
1487
1488 static int snd_rawmidi_dev_register(struct snd_device *device)
1489 {
1490         int idx, err;
1491         struct snd_info_entry *entry;
1492         char name[16];
1493         struct snd_rawmidi *rmidi = device->device_data;
1494
1495         if (rmidi->device >= SNDRV_RAWMIDI_DEVICES)
1496                 return -ENOMEM;
1497         down(&register_mutex);
1498         idx = (rmidi->card->number * SNDRV_RAWMIDI_DEVICES) + rmidi->device;
1499         if (snd_rawmidi_devices[idx] != NULL) {
1500                 up(&register_mutex);
1501                 return -EBUSY;
1502         }
1503         snd_rawmidi_devices[idx] = rmidi;
1504         sprintf(name, "midiC%iD%i", rmidi->card->number, rmidi->device);
1505         if ((err = snd_register_device(SNDRV_DEVICE_TYPE_RAWMIDI,
1506                                        rmidi->card, rmidi->device,
1507                                        &snd_rawmidi_reg, name)) < 0) {
1508                 snd_printk(KERN_ERR "unable to register rawmidi device %i:%i\n", rmidi->card->number, rmidi->device);
1509                 snd_rawmidi_devices[idx] = NULL;
1510                 up(&register_mutex);
1511                 return err;
1512         }
1513         if (rmidi->ops && rmidi->ops->dev_register &&
1514             (err = rmidi->ops->dev_register(rmidi)) < 0) {
1515                 snd_unregister_device(SNDRV_DEVICE_TYPE_RAWMIDI, rmidi->card, rmidi->device);
1516                 snd_rawmidi_devices[idx] = NULL;
1517                 up(&register_mutex);
1518                 return err;
1519         }
1520 #ifdef CONFIG_SND_OSSEMUL
1521         rmidi->ossreg = 0;
1522         if ((int)rmidi->device == midi_map[rmidi->card->number]) {
1523                 if (snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_MIDI,
1524                                             rmidi->card, 0, &snd_rawmidi_reg, name) < 0) {
1525                         snd_printk(KERN_ERR "unable to register OSS rawmidi device %i:%i\n", rmidi->card->number, 0);
1526                 } else {
1527                         rmidi->ossreg++;
1528 #ifdef SNDRV_OSS_INFO_DEV_MIDI
1529                         snd_oss_info_register(SNDRV_OSS_INFO_DEV_MIDI, rmidi->card->number, rmidi->name);
1530 #endif
1531                 }
1532         }
1533         if ((int)rmidi->device == amidi_map[rmidi->card->number]) {
1534                 if (snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_MIDI,
1535                                             rmidi->card, 1, &snd_rawmidi_reg, name) < 0) {
1536                         snd_printk(KERN_ERR "unable to register OSS rawmidi device %i:%i\n", rmidi->card->number, 1);
1537                 } else {
1538                         rmidi->ossreg++;
1539                 }
1540         }
1541 #endif /* CONFIG_SND_OSSEMUL */
1542         up(&register_mutex);
1543         sprintf(name, "midi%d", rmidi->device);
1544         entry = snd_info_create_card_entry(rmidi->card, name, rmidi->card->proc_root);
1545         if (entry) {
1546                 entry->private_data = rmidi;
1547                 entry->c.text.read_size = 1024;
1548                 entry->c.text.read = snd_rawmidi_proc_info_read;
1549                 if (snd_info_register(entry) < 0) {
1550                         snd_info_free_entry(entry);
1551                         entry = NULL;
1552                 }
1553         }
1554         rmidi->proc_entry = entry;
1555 #if defined(CONFIG_SND_SEQUENCER) || (defined(MODULE) && defined(CONFIG_SND_SEQUENCER_MODULE))
1556         if (!rmidi->ops || !rmidi->ops->dev_register) { /* own registration mechanism */
1557                 if (snd_seq_device_new(rmidi->card, rmidi->device, SNDRV_SEQ_DEV_ID_MIDISYNTH, 0, &rmidi->seq_dev) >= 0) {
1558                         rmidi->seq_dev->private_data = rmidi;
1559                         rmidi->seq_dev->private_free = snd_rawmidi_dev_seq_free;
1560                         sprintf(rmidi->seq_dev->name, "MIDI %d-%d", rmidi->card->number, rmidi->device);
1561                         snd_device_register(rmidi->card, rmidi->seq_dev);
1562                 }
1563         }
1564 #endif
1565         return 0;
1566 }
1567
1568 static int snd_rawmidi_dev_disconnect(struct snd_device *device)
1569 {
1570         struct snd_rawmidi *rmidi = device->device_data;
1571         int idx;
1572
1573         down(&register_mutex);
1574         idx = (rmidi->card->number * SNDRV_RAWMIDI_DEVICES) + rmidi->device;
1575         snd_rawmidi_devices[idx] = NULL;
1576         up(&register_mutex);
1577         return 0;
1578 }
1579
1580 static int snd_rawmidi_dev_unregister(struct snd_device *device)
1581 {
1582         int idx;
1583         struct snd_rawmidi *rmidi = device->device_data;
1584
1585         snd_assert(rmidi != NULL, return -ENXIO);
1586         down(&register_mutex);
1587         idx = (rmidi->card->number * SNDRV_RAWMIDI_DEVICES) + rmidi->device;
1588         snd_rawmidi_devices[idx] = NULL;
1589         if (rmidi->proc_entry) {
1590                 snd_info_unregister(rmidi->proc_entry);
1591                 rmidi->proc_entry = NULL;
1592         }
1593 #ifdef CONFIG_SND_OSSEMUL
1594         if (rmidi->ossreg) {
1595                 if ((int)rmidi->device == midi_map[rmidi->card->number]) {
1596                         snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_MIDI, rmidi->card, 0);
1597 #ifdef SNDRV_OSS_INFO_DEV_MIDI
1598                         snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_MIDI, rmidi->card->number);
1599 #endif
1600                 }
1601                 if ((int)rmidi->device == amidi_map[rmidi->card->number])
1602                         snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_MIDI, rmidi->card, 1);
1603                 rmidi->ossreg = 0;
1604         }
1605 #endif /* CONFIG_SND_OSSEMUL */
1606         if (rmidi->ops && rmidi->ops->dev_unregister)
1607                 rmidi->ops->dev_unregister(rmidi);
1608         snd_unregister_device(SNDRV_DEVICE_TYPE_RAWMIDI, rmidi->card, rmidi->device);
1609         up(&register_mutex);
1610 #if defined(CONFIG_SND_SEQUENCER) || (defined(MODULE) && defined(CONFIG_SND_SEQUENCER_MODULE))
1611         if (rmidi->seq_dev) {
1612                 snd_device_free(rmidi->card, rmidi->seq_dev);
1613                 rmidi->seq_dev = NULL;
1614         }
1615 #endif
1616         return snd_rawmidi_free(rmidi);
1617 }
1618
1619 /**
1620  * snd_rawmidi_set_ops - set the rawmidi operators
1621  * @rmidi: the rawmidi instance
1622  * @stream: the stream direction, SNDRV_RAWMIDI_STREAM_XXX
1623  * @ops: the operator table
1624  *
1625  * Sets the rawmidi operators for the given stream direction.
1626  */
1627 void snd_rawmidi_set_ops(struct snd_rawmidi *rmidi, int stream,
1628                          struct snd_rawmidi_ops *ops)
1629 {
1630         struct list_head *list;
1631         struct snd_rawmidi_substream *substream;
1632         
1633         list_for_each(list, &rmidi->streams[stream].substreams) {
1634                 substream = list_entry(list, struct snd_rawmidi_substream, list);
1635                 substream->ops = ops;
1636         }
1637 }
1638
1639 /*
1640  *  ENTRY functions
1641  */
1642
1643 static int __init alsa_rawmidi_init(void)
1644 {
1645
1646         snd_ctl_register_ioctl(snd_rawmidi_control_ioctl);
1647         snd_ctl_register_ioctl_compat(snd_rawmidi_control_ioctl);
1648 #ifdef CONFIG_SND_OSSEMUL
1649         { int i;
1650         /* check device map table */
1651         for (i = 0; i < SNDRV_CARDS; i++) {
1652                 if (midi_map[i] < 0 || midi_map[i] >= SNDRV_RAWMIDI_DEVICES) {
1653                         snd_printk(KERN_ERR "invalid midi_map[%d] = %d\n", i, midi_map[i]);
1654                         midi_map[i] = 0;
1655                 }
1656                 if (amidi_map[i] < 0 || amidi_map[i] >= SNDRV_RAWMIDI_DEVICES) {
1657                         snd_printk(KERN_ERR "invalid amidi_map[%d] = %d\n", i, amidi_map[i]);
1658                         amidi_map[i] = 1;
1659                 }
1660         }
1661         }
1662 #endif /* CONFIG_SND_OSSEMUL */
1663         return 0;
1664 }
1665
1666 static void __exit alsa_rawmidi_exit(void)
1667 {
1668         snd_ctl_unregister_ioctl(snd_rawmidi_control_ioctl);
1669         snd_ctl_unregister_ioctl_compat(snd_rawmidi_control_ioctl);
1670 }
1671
1672 module_init(alsa_rawmidi_init)
1673 module_exit(alsa_rawmidi_exit)
1674
1675 EXPORT_SYMBOL(snd_rawmidi_output_params);
1676 EXPORT_SYMBOL(snd_rawmidi_input_params);
1677 EXPORT_SYMBOL(snd_rawmidi_drop_output);
1678 EXPORT_SYMBOL(snd_rawmidi_drain_output);
1679 EXPORT_SYMBOL(snd_rawmidi_drain_input);
1680 EXPORT_SYMBOL(snd_rawmidi_receive);
1681 EXPORT_SYMBOL(snd_rawmidi_transmit_empty);
1682 EXPORT_SYMBOL(snd_rawmidi_transmit_peek);
1683 EXPORT_SYMBOL(snd_rawmidi_transmit_ack);
1684 EXPORT_SYMBOL(snd_rawmidi_transmit);
1685 EXPORT_SYMBOL(snd_rawmidi_new);
1686 EXPORT_SYMBOL(snd_rawmidi_set_ops);
1687 EXPORT_SYMBOL(snd_rawmidi_info);
1688 EXPORT_SYMBOL(snd_rawmidi_info_select);
1689 EXPORT_SYMBOL(snd_rawmidi_kernel_open);
1690 EXPORT_SYMBOL(snd_rawmidi_kernel_release);
1691 EXPORT_SYMBOL(snd_rawmidi_kernel_read);
1692 EXPORT_SYMBOL(snd_rawmidi_kernel_write);