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[ALSA] Remove xxx_t typedefs: OSS-emulation
[linux-2.6.git] / sound / core / rawmidi.c
blobede0a6083d2933246dc976f84fa3df829f05fe65
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);
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