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rfkill: always call get_state() hook on resume
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / sound / core / rawmidi.c
blob39672f68ce5d2a2c86b4b944377ea115a9c37032
1 /*
2 * Abstract layer for MIDI v1.0 stream
3 * Copyright (c) by Jaroslav Kysela <perex@perex.cz>
4 *
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19 *
20 */
21
22 #include <sound/core.h>
23 #include <linux/major.h>
24 #include <linux/init.h>
25 #include <linux/sched.h>
26 #include <linux/slab.h>
27 #include <linux/time.h>
28 #include <linux/wait.h>
29 #include <linux/mutex.h>
30 #include <linux/moduleparam.h>
31 #include <linux/delay.h>
32 #include <sound/rawmidi.h>
33 #include <sound/info.h>
34 #include <sound/control.h>
35 #include <sound/minors.h>
36 #include <sound/initval.h>
37
38 MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>");
39 MODULE_DESCRIPTION("Midlevel RawMidi code for ALSA.");
40 MODULE_LICENSE("GPL");
41
42 #ifdef CONFIG_SND_OSSEMUL
43 static int midi_map[SNDRV_CARDS];
44 static int amidi_map[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS-1)] = 1};
45 module_param_array(midi_map, int, NULL, 0444);
46 MODULE_PARM_DESC(midi_map, "Raw MIDI device number assigned to 1st OSS device.");
47 module_param_array(amidi_map, int, NULL, 0444);
48 MODULE_PARM_DESC(amidi_map, "Raw MIDI device number assigned to 2nd OSS device.");
49 #endif /* CONFIG_SND_OSSEMUL */
50
51 static int snd_rawmidi_free(struct snd_rawmidi *rawmidi);
52 static int snd_rawmidi_dev_free(struct snd_device *device);
53 static int snd_rawmidi_dev_register(struct snd_device *device);
54 static int snd_rawmidi_dev_disconnect(struct snd_device *device);
55
56 static LIST_HEAD(snd_rawmidi_devices);
57 static DEFINE_MUTEX(register_mutex);
58
59 static struct snd_rawmidi *snd_rawmidi_search(struct snd_card *card, int device)
60 {
61 struct snd_rawmidi *rawmidi;
62
63 list_for_each_entry(rawmidi, &snd_rawmidi_devices, list)
64 if (rawmidi->card == card && rawmidi->device == device)
65 return rawmidi;
66 return NULL;
67 }
68
69 static inline unsigned short snd_rawmidi_file_flags(struct file *file)
70 {
71 switch (file->f_mode & (FMODE_READ | FMODE_WRITE)) {
72 case FMODE_WRITE:
73 return SNDRV_RAWMIDI_LFLG_OUTPUT;
74 case FMODE_READ:
75 return SNDRV_RAWMIDI_LFLG_INPUT;
76 default:
77 return SNDRV_RAWMIDI_LFLG_OPEN;
78 }
79 }
80
81 static inline int snd_rawmidi_ready(struct snd_rawmidi_substream *substream)
82 {
83 struct snd_rawmidi_runtime *runtime = substream->runtime;
84 return runtime->avail >= runtime->avail_min;
85 }
86
87 static inline int snd_rawmidi_ready_append(struct snd_rawmidi_substream *substream,
88 size_t count)
89 {
90 struct snd_rawmidi_runtime *runtime = substream->runtime;
91 return runtime->avail >= runtime->avail_min &&
92 (!substream->append || runtime->avail >= count);
93 }
94
95 static void snd_rawmidi_input_event_tasklet(unsigned long data)
96 {
97 struct snd_rawmidi_substream *substream = (struct snd_rawmidi_substream *)data;
98 substream->runtime->event(substream);
99 }
100
101 static void snd_rawmidi_output_trigger_tasklet(unsigned long data)
102 {
103 struct snd_rawmidi_substream *substream = (struct snd_rawmidi_substream *)data;
104 substream->ops->trigger(substream, 1);
105 }
106
107 static int snd_rawmidi_runtime_create(struct snd_rawmidi_substream *substream)
108 {
109 struct snd_rawmidi_runtime *runtime;
110
111 if ((runtime = kzalloc(sizeof(*runtime), GFP_KERNEL)) == NULL)
112 return -ENOMEM;
113 spin_lock_init(&runtime->lock);
114 init_waitqueue_head(&runtime->sleep);
115 if (substream->stream == SNDRV_RAWMIDI_STREAM_INPUT)
116 tasklet_init(&runtime->tasklet,
117 snd_rawmidi_input_event_tasklet,
118 (unsigned long)substream);
119 else
120 tasklet_init(&runtime->tasklet,
121 snd_rawmidi_output_trigger_tasklet,
122 (unsigned long)substream);
123 runtime->event = NULL;
124 runtime->buffer_size = PAGE_SIZE;
125 runtime->avail_min = 1;
126 if (substream->stream == SNDRV_RAWMIDI_STREAM_INPUT)
127 runtime->avail = 0;
128 else
129 runtime->avail = runtime->buffer_size;
130 if ((runtime->buffer = kmalloc(runtime->buffer_size, GFP_KERNEL)) == NULL) {
131 kfree(runtime);
132 return -ENOMEM;
133 }
134 runtime->appl_ptr = runtime->hw_ptr = 0;
135 substream->runtime = runtime;
136 return 0;
137 }
138
139 static int snd_rawmidi_runtime_free(struct snd_rawmidi_substream *substream)
140 {
141 struct snd_rawmidi_runtime *runtime = substream->runtime;
142
143 kfree(runtime->buffer);
144 kfree(runtime);
145 substream->runtime = NULL;
146 return 0;
147 }
148
149 static inline void snd_rawmidi_output_trigger(struct snd_rawmidi_substream *substream,int up)
150 {
151 if (!substream->opened)
152 return;
153 if (up) {
154 tasklet_hi_schedule(&substream->runtime->tasklet);
155 } else {
156 tasklet_kill(&substream->runtime->tasklet);
157 substream->ops->trigger(substream, 0);
158 }
159 }
160
161 static void snd_rawmidi_input_trigger(struct snd_rawmidi_substream *substream, int up)
162 {
163 if (!substream->opened)
164 return;
165 substream->ops->trigger(substream, up);
166 if (!up && substream->runtime->event)
167 tasklet_kill(&substream->runtime->tasklet);
168 }
169
170 int snd_rawmidi_drop_output(struct snd_rawmidi_substream *substream)
171 {
172 unsigned long flags;
173 struct snd_rawmidi_runtime *runtime = substream->runtime;
174
175 snd_rawmidi_output_trigger(substream, 0);
176 runtime->drain = 0;
177 spin_lock_irqsave(&runtime->lock, flags);
178 runtime->appl_ptr = runtime->hw_ptr = 0;
179 runtime->avail = runtime->buffer_size;
180 spin_unlock_irqrestore(&runtime->lock, flags);
181 return 0;
182 }
183
184 int snd_rawmidi_drain_output(struct snd_rawmidi_substream *substream)
185 {
186 int err;
187 long timeout;
188 struct snd_rawmidi_runtime *runtime = substream->runtime;
189
190 err = 0;
191 runtime->drain = 1;
192 timeout = wait_event_interruptible_timeout(runtime->sleep,
193 (runtime->avail >= runtime->buffer_size),
194 10*HZ);
195 if (signal_pending(current))
196 err = -ERESTARTSYS;
197 if (runtime->avail < runtime->buffer_size && !timeout) {
198 snd_printk(KERN_WARNING "rawmidi drain error (avail = %li, buffer_size = %li)\n", (long)runtime->avail, (long)runtime->buffer_size);
199 err = -EIO;
200 }
201 runtime->drain = 0;
202 if (err != -ERESTARTSYS) {
203 /* we need wait a while to make sure that Tx FIFOs are empty */
204 if (substream->ops->drain)
205 substream->ops->drain(substream);
206 else
207 msleep(50);
208 snd_rawmidi_drop_output(substream);
209 }
210 return err;
211 }
212
213 int snd_rawmidi_drain_input(struct snd_rawmidi_substream *substream)
214 {
215 unsigned long flags;
216 struct snd_rawmidi_runtime *runtime = substream->runtime;
217
218 snd_rawmidi_input_trigger(substream, 0);
219 runtime->drain = 0;
220 spin_lock_irqsave(&runtime->lock, flags);
221 runtime->appl_ptr = runtime->hw_ptr = 0;
222 runtime->avail = 0;
223 spin_unlock_irqrestore(&runtime->lock, flags);
224 return 0;
225 }
226
227 int snd_rawmidi_kernel_open(struct snd_card *card, int device, int subdevice,
228 int mode, struct snd_rawmidi_file * rfile)
229 {
230 struct snd_rawmidi *rmidi;
231 struct list_head *list1, *list2;
232 struct snd_rawmidi_substream *sinput = NULL, *soutput = NULL;
233 struct snd_rawmidi_runtime *input = NULL, *output = NULL;
234 int err;
235
236 if (rfile)
237 rfile->input = rfile->output = NULL;
238 mutex_lock(&register_mutex);
239 rmidi = snd_rawmidi_search(card, device);
240 mutex_unlock(&register_mutex);
241 if (rmidi == NULL) {
242 err = -ENODEV;
243 goto __error1;
244 }
245 if (!try_module_get(rmidi->card->module)) {
246 err = -EFAULT;
247 goto __error1;
248 }
249 if (!(mode & SNDRV_RAWMIDI_LFLG_NOOPENLOCK))
250 mutex_lock(&rmidi->open_mutex);
251 if (mode & SNDRV_RAWMIDI_LFLG_INPUT) {
252 if (!(rmidi->info_flags & SNDRV_RAWMIDI_INFO_INPUT)) {
253 err = -ENXIO;
254 goto __error;
255 }
256 if (subdevice >= 0 && (unsigned int)subdevice >= rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substream_count) {
257 err = -ENODEV;
258 goto __error;
259 }
260 if (rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substream_opened >=
261 rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substream_count) {
262 err = -EAGAIN;
263 goto __error;
264 }
265 }
266 if (mode & SNDRV_RAWMIDI_LFLG_OUTPUT) {
267 if (!(rmidi->info_flags & SNDRV_RAWMIDI_INFO_OUTPUT)) {
268 err = -ENXIO;
269 goto __error;
270 }
271 if (subdevice >= 0 && (unsigned int)subdevice >= rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substream_count) {
272 err = -ENODEV;
273 goto __error;
274 }
275 if (rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substream_opened >=
276 rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substream_count) {
277 err = -EAGAIN;
278 goto __error;
279 }
280 }
281 list1 = rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substreams.next;
282 while (1) {
283 if (list1 == &rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substreams) {
284 sinput = NULL;
285 if (mode & SNDRV_RAWMIDI_LFLG_INPUT) {
286 err = -EAGAIN;
287 goto __error;
288 }
289 break;
290 }
291 sinput = list_entry(list1, struct snd_rawmidi_substream, list);
292 if ((mode & SNDRV_RAWMIDI_LFLG_INPUT) && sinput->opened)
293 goto __nexti;
294 if (subdevice < 0 || (subdevice >= 0 && subdevice == sinput->number))
295 break;
296 __nexti:
297 list1 = list1->next;
298 }
299 list2 = rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substreams.next;
300 while (1) {
301 if (list2 == &rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substreams) {
302 soutput = NULL;
303 if (mode & SNDRV_RAWMIDI_LFLG_OUTPUT) {
304 err = -EAGAIN;
305 goto __error;
306 }
307 break;
308 }
309 soutput = list_entry(list2, struct snd_rawmidi_substream, list);
310 if (mode & SNDRV_RAWMIDI_LFLG_OUTPUT) {
311 if (mode & SNDRV_RAWMIDI_LFLG_APPEND) {
312 if (soutput->opened && !soutput->append)
313 goto __nexto;
314 } else {
315 if (soutput->opened)
316 goto __nexto;
317 }
318 }
319 if (subdevice < 0 || (subdevice >= 0 && subdevice == soutput->number))
320 break;
321 __nexto:
322 list2 = list2->next;
323 }
324 if (mode & SNDRV_RAWMIDI_LFLG_INPUT) {
325 if ((err = snd_rawmidi_runtime_create(sinput)) < 0)
326 goto __error;
327 input = sinput->runtime;
328 if ((err = sinput->ops->open(sinput)) < 0)
329 goto __error;
330 sinput->opened = 1;
331 rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substream_opened++;
332 } else {
333 sinput = NULL;
334 }
335 if (mode & SNDRV_RAWMIDI_LFLG_OUTPUT) {
336 if (soutput->opened)
337 goto __skip_output;
338 if ((err = snd_rawmidi_runtime_create(soutput)) < 0) {
339 if (mode & SNDRV_RAWMIDI_LFLG_INPUT)
340 sinput->ops->close(sinput);
341 goto __error;
342 }
343 output = soutput->runtime;
344 if ((err = soutput->ops->open(soutput)) < 0) {
345 if (mode & SNDRV_RAWMIDI_LFLG_INPUT)
346 sinput->ops->close(sinput);
347 goto __error;
348 }
349 __skip_output:
350 soutput->opened = 1;
351 if (mode & SNDRV_RAWMIDI_LFLG_APPEND)
352 soutput->append = 1;
353 if (soutput->use_count++ == 0)
354 soutput->active_sensing = 1;
355 rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substream_opened++;
356 } else {
357 soutput = NULL;
358 }
359 if (!(mode & SNDRV_RAWMIDI_LFLG_NOOPENLOCK))
360 mutex_unlock(&rmidi->open_mutex);
361 if (rfile) {
362 rfile->rmidi = rmidi;
363 rfile->input = sinput;
364 rfile->output = soutput;
365 }
366 return 0;
367
368 __error:
369 if (input != NULL)
370 snd_rawmidi_runtime_free(sinput);
371 if (output != NULL)
372 snd_rawmidi_runtime_free(soutput);
373 module_put(rmidi->card->module);
374 if (!(mode & SNDRV_RAWMIDI_LFLG_NOOPENLOCK))
375 mutex_unlock(&rmidi->open_mutex);
376 __error1:
377 return err;
378 }
379
380 static int snd_rawmidi_open(struct inode *inode, struct file *file)
381 {
382 int maj = imajor(inode);
383 struct snd_card *card;
384 int subdevice;
385 unsigned short fflags;
386 int err;
387 struct snd_rawmidi *rmidi;
388 struct snd_rawmidi_file *rawmidi_file;
389 wait_queue_t wait;
390 struct snd_ctl_file *kctl;
391
392 if (maj == snd_major) {
393 rmidi = snd_lookup_minor_data(iminor(inode),
394 SNDRV_DEVICE_TYPE_RAWMIDI);
395 #ifdef CONFIG_SND_OSSEMUL
396 } else if (maj == SOUND_MAJOR) {
397 rmidi = snd_lookup_oss_minor_data(iminor(inode),
398 SNDRV_OSS_DEVICE_TYPE_MIDI);
399 #endif
400 } else
401 return -ENXIO;
402
403 if (rmidi == NULL)
404 return -ENODEV;
405 if ((file->f_flags & O_APPEND) && !(file->f_flags & O_NONBLOCK))
406 return -EINVAL; /* invalid combination */
407 card = rmidi->card;
408 err = snd_card_file_add(card, file);
409 if (err < 0)
410 return -ENODEV;
411 fflags = snd_rawmidi_file_flags(file);
412 if ((file->f_flags & O_APPEND) || maj == SOUND_MAJOR) /* OSS emul? */
413 fflags |= SNDRV_RAWMIDI_LFLG_APPEND;
414 fflags |= SNDRV_RAWMIDI_LFLG_NOOPENLOCK;
415 rawmidi_file = kmalloc(sizeof(*rawmidi_file), GFP_KERNEL);
416 if (rawmidi_file == NULL) {
417 snd_card_file_remove(card, file);
418 return -ENOMEM;
419 }
420 init_waitqueue_entry(&wait, current);
421 add_wait_queue(&rmidi->open_wait, &wait);
422 mutex_lock(&rmidi->open_mutex);
423 while (1) {
424 subdevice = -1;
425 read_lock(&card->ctl_files_rwlock);
426 list_for_each_entry(kctl, &card->ctl_files, list) {
427 if (kctl->pid == current->pid) {
428 subdevice = kctl->prefer_rawmidi_subdevice;
429 if (subdevice != -1)
430 break;
431 }
432 }
433 read_unlock(&card->ctl_files_rwlock);
434 err = snd_rawmidi_kernel_open(rmidi->card, rmidi->device,
435 subdevice, fflags, rawmidi_file);
436 if (err >= 0)
437 break;
438 if (err == -EAGAIN) {
439 if (file->f_flags & O_NONBLOCK) {
440 err = -EBUSY;
441 break;
442 }
443 } else
444 break;
445 set_current_state(TASK_INTERRUPTIBLE);
446 mutex_unlock(&rmidi->open_mutex);
447 schedule();
448 mutex_lock(&rmidi->open_mutex);
449 if (signal_pending(current)) {
450 err = -ERESTARTSYS;
451 break;
452 }
453 }
454 #ifdef CONFIG_SND_OSSEMUL
455 if (rawmidi_file->input && rawmidi_file->input->runtime)
456 rawmidi_file->input->runtime->oss = (maj == SOUND_MAJOR);
457 if (rawmidi_file->output && rawmidi_file->output->runtime)
458 rawmidi_file->output->runtime->oss = (maj == SOUND_MAJOR);
459 #endif
460 remove_wait_queue(&rmidi->open_wait, &wait);
461 if (err >= 0) {
462 file->private_data = rawmidi_file;
463 } else {
464 snd_card_file_remove(card, file);
465 kfree(rawmidi_file);
466 }
467 mutex_unlock(&rmidi->open_mutex);
468 return err;
469 }
470
471 int snd_rawmidi_kernel_release(struct snd_rawmidi_file * rfile)
472 {
473 struct snd_rawmidi *rmidi;
474 struct snd_rawmidi_substream *substream;
475 struct snd_rawmidi_runtime *runtime;
476
477 if (snd_BUG_ON(!rfile))
478 return -ENXIO;
479 rmidi = rfile->rmidi;
480 mutex_lock(&rmidi->open_mutex);
481 if (rfile->input != NULL) {
482 substream = rfile->input;
483 rfile->input = NULL;
484 runtime = substream->runtime;
485 snd_rawmidi_input_trigger(substream, 0);
486 substream->ops->close(substream);
487 if (runtime->private_free != NULL)
488 runtime->private_free(substream);
489 snd_rawmidi_runtime_free(substream);
490 substream->opened = 0;
491 rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substream_opened--;
492 }
493 if (rfile->output != NULL) {
494 substream = rfile->output;
495 rfile->output = NULL;
496 if (--substream->use_count == 0) {
497 runtime = substream->runtime;
498 if (substream->active_sensing) {
499 unsigned char buf = 0xfe;
500 /* sending single active sensing message to shut the device up */
501 snd_rawmidi_kernel_write(substream, &buf, 1);
502 }
503 if (snd_rawmidi_drain_output(substream) == -ERESTARTSYS)
504 snd_rawmidi_output_trigger(substream, 0);
505 substream->ops->close(substream);
506 if (runtime->private_free != NULL)
507 runtime->private_free(substream);
508 snd_rawmidi_runtime_free(substream);
509 substream->opened = 0;
510 substream->append = 0;
511 }
512 rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substream_opened--;
513 }
514 mutex_unlock(&rmidi->open_mutex);
515 module_put(rmidi->card->module);
516 return 0;
517 }
518
519 static int snd_rawmidi_release(struct inode *inode, struct file *file)
520 {
521 struct snd_rawmidi_file *rfile;
522 struct snd_rawmidi *rmidi;
523 int err;
524
525 rfile = file->private_data;
526 err = snd_rawmidi_kernel_release(rfile);
527 rmidi = rfile->rmidi;
528 wake_up(&rmidi->open_wait);
529 kfree(rfile);
530 snd_card_file_remove(rmidi->card, file);
531 return err;
532 }
533
534 static int snd_rawmidi_info(struct snd_rawmidi_substream *substream,
535 struct snd_rawmidi_info *info)
536 {
537 struct snd_rawmidi *rmidi;
538
539 if (substream == NULL)
540 return -ENODEV;
541 rmidi = substream->rmidi;
542 memset(info, 0, sizeof(*info));
543 info->card = rmidi->card->number;
544 info->device = rmidi->device;
545 info->subdevice = substream->number;
546 info->stream = substream->stream;
547 info->flags = rmidi->info_flags;
548 strcpy(info->id, rmidi->id);
549 strcpy(info->name, rmidi->name);
550 strcpy(info->subname, substream->name);
551 info->subdevices_count = substream->pstr->substream_count;
552 info->subdevices_avail = (substream->pstr->substream_count -
553 substream->pstr->substream_opened);
554 return 0;
555 }
556
557 static int snd_rawmidi_info_user(struct snd_rawmidi_substream *substream,
558 struct snd_rawmidi_info __user * _info)
559 {
560 struct snd_rawmidi_info info;
561 int err;
562 if ((err = snd_rawmidi_info(substream, &info)) < 0)
563 return err;
564 if (copy_to_user(_info, &info, sizeof(struct snd_rawmidi_info)))
565 return -EFAULT;
566 return 0;
567 }
568
569 int snd_rawmidi_info_select(struct snd_card *card, struct snd_rawmidi_info *info)
570 {
571 struct snd_rawmidi *rmidi;
572 struct snd_rawmidi_str *pstr;
573 struct snd_rawmidi_substream *substream;
574
575 mutex_lock(&register_mutex);
576 rmidi = snd_rawmidi_search(card, info->device);
577 mutex_unlock(&register_mutex);
578 if (!rmidi)
579 return -ENXIO;
580 if (info->stream < 0 || info->stream > 1)
581 return -EINVAL;
582 pstr = &rmidi->streams[info->stream];
583 if (pstr->substream_count == 0)
584 return -ENOENT;
585 if (info->subdevice >= pstr->substream_count)
586 return -ENXIO;
587 list_for_each_entry(substream, &pstr->substreams, list) {
588 if ((unsigned int)substream->number == info->subdevice)
589 return snd_rawmidi_info(substream, info);
590 }
591 return -ENXIO;
592 }
593
594 static int snd_rawmidi_info_select_user(struct snd_card *card,
595 struct snd_rawmidi_info __user *_info)
596 {
597 int err;
598 struct snd_rawmidi_info info;
599 if (get_user(info.device, &_info->device))
600 return -EFAULT;
601 if (get_user(info.stream, &_info->stream))
602 return -EFAULT;
603 if (get_user(info.subdevice, &_info->subdevice))
604 return -EFAULT;
605 if ((err = snd_rawmidi_info_select(card, &info)) < 0)
606 return err;
607 if (copy_to_user(_info, &info, sizeof(struct snd_rawmidi_info)))
608 return -EFAULT;
609 return 0;
610 }
611
612 int snd_rawmidi_output_params(struct snd_rawmidi_substream *substream,
613 struct snd_rawmidi_params * params)
614 {
615 char *newbuf;
616 struct snd_rawmidi_runtime *runtime = substream->runtime;
617
618 if (substream->append && substream->use_count > 1)
619 return -EBUSY;
620 snd_rawmidi_drain_output(substream);
621 if (params->buffer_size < 32 || params->buffer_size > 1024L * 1024L) {
622 return -EINVAL;
623 }
624 if (params->avail_min < 1 || params->avail_min > params->buffer_size) {
625 return -EINVAL;
626 }
627 if (params->buffer_size != runtime->buffer_size) {
628 newbuf = kmalloc(params->buffer_size, GFP_KERNEL);
629 if (!newbuf)
630 return -ENOMEM;
631 kfree(runtime->buffer);
632 runtime->buffer = newbuf;
633 runtime->buffer_size = params->buffer_size;
634 runtime->avail = runtime->buffer_size;
635 }
636 runtime->avail_min = params->avail_min;
637 substream->active_sensing = !params->no_active_sensing;
638 return 0;
639 }
640
641 int snd_rawmidi_input_params(struct snd_rawmidi_substream *substream,
642 struct snd_rawmidi_params * params)
643 {
644 char *newbuf;
645 struct snd_rawmidi_runtime *runtime = substream->runtime;
646
647 snd_rawmidi_drain_input(substream);
648 if (params->buffer_size < 32 || params->buffer_size > 1024L * 1024L) {
649 return -EINVAL;
650 }
651 if (params->avail_min < 1 || params->avail_min > params->buffer_size) {
652 return -EINVAL;
653 }
654 if (params->buffer_size != runtime->buffer_size) {
655 newbuf = kmalloc(params->buffer_size, GFP_KERNEL);
656 if (!newbuf)
657 return -ENOMEM;
658 kfree(runtime->buffer);
659 runtime->buffer = newbuf;
660 runtime->buffer_size = params->buffer_size;
661 }
662 runtime->avail_min = params->avail_min;
663 return 0;
664 }
665
666 static int snd_rawmidi_output_status(struct snd_rawmidi_substream *substream,
667 struct snd_rawmidi_status * status)
668 {
669 struct snd_rawmidi_runtime *runtime = substream->runtime;
670
671 memset(status, 0, sizeof(*status));
672 status->stream = SNDRV_RAWMIDI_STREAM_OUTPUT;
673 spin_lock_irq(&runtime->lock);
674 status->avail = runtime->avail;
675 spin_unlock_irq(&runtime->lock);
676 return 0;
677 }
678
679 static int snd_rawmidi_input_status(struct snd_rawmidi_substream *substream,
680 struct snd_rawmidi_status * status)
681 {
682 struct snd_rawmidi_runtime *runtime = substream->runtime;
683
684 memset(status, 0, sizeof(*status));
685 status->stream = SNDRV_RAWMIDI_STREAM_INPUT;
686 spin_lock_irq(&runtime->lock);
687 status->avail = runtime->avail;
688 status->xruns = runtime->xruns;
689 runtime->xruns = 0;
690 spin_unlock_irq(&runtime->lock);
691 return 0;
692 }
693
694 static long snd_rawmidi_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
695 {
696 struct snd_rawmidi_file *rfile;
697 void __user *argp = (void __user *)arg;
698
699 rfile = file->private_data;
700 if (((cmd >> 8) & 0xff) != 'W')
701 return -ENOTTY;
702 switch (cmd) {
703 case SNDRV_RAWMIDI_IOCTL_PVERSION:
704 return put_user(SNDRV_RAWMIDI_VERSION, (int __user *)argp) ? -EFAULT : 0;
705 case SNDRV_RAWMIDI_IOCTL_INFO:
706 {
707 int stream;
708 struct snd_rawmidi_info __user *info = argp;
709 if (get_user(stream, &info->stream))
710 return -EFAULT;
711 switch (stream) {
712 case SNDRV_RAWMIDI_STREAM_INPUT:
713 return snd_rawmidi_info_user(rfile->input, info);
714 case SNDRV_RAWMIDI_STREAM_OUTPUT:
715 return snd_rawmidi_info_user(rfile->output, info);
716 default:
717 return -EINVAL;
718 }
719 }
720 case SNDRV_RAWMIDI_IOCTL_PARAMS:
721 {
722 struct snd_rawmidi_params params;
723 if (copy_from_user(&params, argp, sizeof(struct snd_rawmidi_params)))
724 return -EFAULT;
725 switch (params.stream) {
726 case SNDRV_RAWMIDI_STREAM_OUTPUT:
727 if (rfile->output == NULL)
728 return -EINVAL;
729 return snd_rawmidi_output_params(rfile->output, &params);
730 case SNDRV_RAWMIDI_STREAM_INPUT:
731 if (rfile->input == NULL)
732 return -EINVAL;
733 return snd_rawmidi_input_params(rfile->input, &params);
734 default:
735 return -EINVAL;
736 }
737 }
738 case SNDRV_RAWMIDI_IOCTL_STATUS:
739 {
740 int err = 0;
741 struct snd_rawmidi_status status;
742 if (copy_from_user(&status, argp, sizeof(struct snd_rawmidi_status)))
743 return -EFAULT;
744 switch (status.stream) {
745 case SNDRV_RAWMIDI_STREAM_OUTPUT:
746 if (rfile->output == NULL)
747 return -EINVAL;
748 err = snd_rawmidi_output_status(rfile->output, &status);
749 break;
750 case SNDRV_RAWMIDI_STREAM_INPUT:
751 if (rfile->input == NULL)
752 return -EINVAL;
753 err = snd_rawmidi_input_status(rfile->input, &status);
754 break;
755 default:
756 return -EINVAL;
757 }
758 if (err < 0)
759 return err;
760 if (copy_to_user(argp, &status, sizeof(struct snd_rawmidi_status)))
761 return -EFAULT;
762 return 0;
763 }
764 case SNDRV_RAWMIDI_IOCTL_DROP:
765 {
766 int val;
767 if (get_user(val, (int __user *) argp))
768 return -EFAULT;
769 switch (val) {
770 case SNDRV_RAWMIDI_STREAM_OUTPUT:
771 if (rfile->output == NULL)
772 return -EINVAL;
773 return snd_rawmidi_drop_output(rfile->output);
774 default:
775 return -EINVAL;
776 }
777 }
778 case SNDRV_RAWMIDI_IOCTL_DRAIN:
779 {
780 int val;
781 if (get_user(val, (int __user *) argp))
782 return -EFAULT;
783 switch (val) {
784 case SNDRV_RAWMIDI_STREAM_OUTPUT:
785 if (rfile->output == NULL)
786 return -EINVAL;
787 return snd_rawmidi_drain_output(rfile->output);
788 case SNDRV_RAWMIDI_STREAM_INPUT:
789 if (rfile->input == NULL)
790 return -EINVAL;
791 return snd_rawmidi_drain_input(rfile->input);
792 default:
793 return -EINVAL;
794 }
795 }
796 #ifdef CONFIG_SND_DEBUG
797 default:
798 snd_printk(KERN_WARNING "rawmidi: unknown command = 0x%x\n", cmd);
799 #endif
800 }
801 return -ENOTTY;
802 }
803
804 static int snd_rawmidi_control_ioctl(struct snd_card *card,
805 struct snd_ctl_file *control,
806 unsigned int cmd,
807 unsigned long arg)
808 {
809 void __user *argp = (void __user *)arg;
810
811 switch (cmd) {
812 case SNDRV_CTL_IOCTL_RAWMIDI_NEXT_DEVICE:
813 {
814 int device;
815
816 if (get_user(device, (int __user *)argp))
817 return -EFAULT;
818 mutex_lock(&register_mutex);
819 device = device < 0 ? 0 : device + 1;
820 while (device < SNDRV_RAWMIDI_DEVICES) {
821 if (snd_rawmidi_search(card, device))
822 break;
823 device++;
824 }
825 if (device == SNDRV_RAWMIDI_DEVICES)
826 device = -1;
827 mutex_unlock(&register_mutex);
828 if (put_user(device, (int __user *)argp))
829 return -EFAULT;
830 return 0;
831 }
832 case SNDRV_CTL_IOCTL_RAWMIDI_PREFER_SUBDEVICE:
833 {
834 int val;
835
836 if (get_user(val, (int __user *)argp))
837 return -EFAULT;
838 control->prefer_rawmidi_subdevice = val;
839 return 0;
840 }
841 case SNDRV_CTL_IOCTL_RAWMIDI_INFO:
842 return snd_rawmidi_info_select_user(card, argp);
843 }
844 return -ENOIOCTLCMD;
845 }
846
847 /**
848 * snd_rawmidi_receive - receive the input data from the device
849 * @substream: the rawmidi substream
850 * @buffer: the buffer pointer
851 * @count: the data size to read
852 *
853 * Reads the data from the internal buffer.
854 *
855 * Returns the size of read data, or a negative error code on failure.
856 */
857 int snd_rawmidi_receive(struct snd_rawmidi_substream *substream,
858 const unsigned char *buffer, int count)
859 {
860 unsigned long flags;
861 int result = 0, count1;
862 struct snd_rawmidi_runtime *runtime = substream->runtime;
863
864 if (!substream->opened)
865 return -EBADFD;
866 if (runtime->buffer == NULL) {
867 snd_printd("snd_rawmidi_receive: input is not active!!!\n");
868 return -EINVAL;
869 }
870 spin_lock_irqsave(&runtime->lock, flags);
871 if (count == 1) { /* special case, faster code */
872 substream->bytes++;
873 if (runtime->avail < runtime->buffer_size) {
874 runtime->buffer[runtime->hw_ptr++] = buffer[0];
875 runtime->hw_ptr %= runtime->buffer_size;
876 runtime->avail++;
877 result++;
878 } else {
879 runtime->xruns++;
880 }
881 } else {
882 substream->bytes += count;
883 count1 = runtime->buffer_size - runtime->hw_ptr;
884 if (count1 > count)
885 count1 = count;
886 if (count1 > (int)(runtime->buffer_size - runtime->avail))
887 count1 = runtime->buffer_size - runtime->avail;
888 memcpy(runtime->buffer + runtime->hw_ptr, buffer, count1);
889 runtime->hw_ptr += count1;
890 runtime->hw_ptr %= runtime->buffer_size;
891 runtime->avail += count1;
892 count -= count1;
893 result += count1;
894 if (count > 0) {
895 buffer += count1;
896 count1 = count;
897 if (count1 > (int)(runtime->buffer_size - runtime->avail)) {
898 count1 = runtime->buffer_size - runtime->avail;
899 runtime->xruns += count - count1;
900 }
901 if (count1 > 0) {
902 memcpy(runtime->buffer, buffer, count1);
903 runtime->hw_ptr = count1;
904 runtime->avail += count1;
905 result += count1;
906 }
907 }
908 }
909 if (result > 0) {
910 if (runtime->event)
911 tasklet_hi_schedule(&runtime->tasklet);
912 else if (snd_rawmidi_ready(substream))
913 wake_up(&runtime->sleep);
914 }
915 spin_unlock_irqrestore(&runtime->lock, flags);
916 return result;
917 }
918
919 static long snd_rawmidi_kernel_read1(struct snd_rawmidi_substream *substream,
920 unsigned char __user *userbuf,
921 unsigned char *kernelbuf, long count)
922 {
923 unsigned long flags;
924 long result = 0, count1;
925 struct snd_rawmidi_runtime *runtime = substream->runtime;
926
927 while (count > 0 && runtime->avail) {
928 count1 = runtime->buffer_size - runtime->appl_ptr;
929 if (count1 > count)
930 count1 = count;
931 spin_lock_irqsave(&runtime->lock, flags);
932 if (count1 > (int)runtime->avail)
933 count1 = runtime->avail;
934 if (kernelbuf)
935 memcpy(kernelbuf + result, runtime->buffer + runtime->appl_ptr, count1);
936 if (userbuf) {
937 spin_unlock_irqrestore(&runtime->lock, flags);
938 if (copy_to_user(userbuf + result,
939 runtime->buffer + runtime->appl_ptr, count1)) {
940 return result > 0 ? result : -EFAULT;
941 }
942 spin_lock_irqsave(&runtime->lock, flags);
943 }
944 runtime->appl_ptr += count1;
945 runtime->appl_ptr %= runtime->buffer_size;
946 runtime->avail -= count1;
947 spin_unlock_irqrestore(&runtime->lock, flags);
948 result += count1;
949 count -= count1;
950 }
951 return result;
952 }
953
954 long snd_rawmidi_kernel_read(struct snd_rawmidi_substream *substream,
955 unsigned char *buf, long count)
956 {
957 snd_rawmidi_input_trigger(substream, 1);
958 return snd_rawmidi_kernel_read1(substream, NULL/*userbuf*/, buf, count);
959 }
960
961 static ssize_t snd_rawmidi_read(struct file *file, char __user *buf, size_t count,
962 loff_t *offset)
963 {
964 long result;
965 int count1;
966 struct snd_rawmidi_file *rfile;
967 struct snd_rawmidi_substream *substream;
968 struct snd_rawmidi_runtime *runtime;
969
970 rfile = file->private_data;
971 substream = rfile->input;
972 if (substream == NULL)
973 return -EIO;
974 runtime = substream->runtime;
975 snd_rawmidi_input_trigger(substream, 1);
976 result = 0;
977 while (count > 0) {
978 spin_lock_irq(&runtime->lock);
979 while (!snd_rawmidi_ready(substream)) {
980 wait_queue_t wait;
981 if ((file->f_flags & O_NONBLOCK) != 0 || result > 0) {
982 spin_unlock_irq(&runtime->lock);
983 return result > 0 ? result : -EAGAIN;
984 }
985 init_waitqueue_entry(&wait, current);
986 add_wait_queue(&runtime->sleep, &wait);
987 set_current_state(TASK_INTERRUPTIBLE);
988 spin_unlock_irq(&runtime->lock);
989 schedule();
990 remove_wait_queue(&runtime->sleep, &wait);
991 if (signal_pending(current))
992 return result > 0 ? result : -ERESTARTSYS;
993 if (!runtime->avail)
994 return result > 0 ? result : -EIO;
995 spin_lock_irq(&runtime->lock);
996 }
997 spin_unlock_irq(&runtime->lock);
998 count1 = snd_rawmidi_kernel_read1(substream,
999 (unsigned char __user *)buf,
1000 NULL/*kernelbuf*/,
1001 count);
1002 if (count1 < 0)
1003 return result > 0 ? result : count1;
1004 result += count1;
1005 buf += count1;
1006 count -= count1;
1007 }
1008 return result;
1009 }
1010
1011 /**
1012 * snd_rawmidi_transmit_empty - check whether the output buffer is empty
1013 * @substream: the rawmidi substream
1014 *
1015 * Returns 1 if the internal output buffer is empty, 0 if not.
1016 */
1017 int snd_rawmidi_transmit_empty(struct snd_rawmidi_substream *substream)
1018 {
1019 struct snd_rawmidi_runtime *runtime = substream->runtime;
1020 int result;
1021 unsigned long flags;
1022
1023 if (runtime->buffer == NULL) {
1024 snd_printd("snd_rawmidi_transmit_empty: output is not active!!!\n");
1025 return 1;
1026 }
1027 spin_lock_irqsave(&runtime->lock, flags);
1028 result = runtime->avail >= runtime->buffer_size;
1029 spin_unlock_irqrestore(&runtime->lock, flags);
1030 return result;
1031 }
1032
1033 /**
1034 * snd_rawmidi_transmit_peek - copy data from the internal buffer
1035 * @substream: the rawmidi substream
1036 * @buffer: the buffer pointer
1037 * @count: data size to transfer
1038 *
1039 * Copies data from the internal output buffer to the given buffer.
1040 *
1041 * Call this in the interrupt handler when the midi output is ready,
1042 * and call snd_rawmidi_transmit_ack() after the transmission is
1043 * finished.
1044 *
1045 * Returns the size of copied data, or a negative error code on failure.
1046 */
1047 int snd_rawmidi_transmit_peek(struct snd_rawmidi_substream *substream,
1048 unsigned char *buffer, int count)
1049 {
1050 unsigned long flags;
1051 int result, count1;
1052 struct snd_rawmidi_runtime *runtime = substream->runtime;
1053
1054 if (runtime->buffer == NULL) {
1055 snd_printd("snd_rawmidi_transmit_peek: output is not active!!!\n");
1056 return -EINVAL;
1057 }
1058 result = 0;
1059 spin_lock_irqsave(&runtime->lock, flags);
1060 if (runtime->avail >= runtime->buffer_size) {
1061 /* warning: lowlevel layer MUST trigger down the hardware */
1062 goto __skip;
1063 }
1064 if (count == 1) { /* special case, faster code */
1065 *buffer = runtime->buffer[runtime->hw_ptr];
1066 result++;
1067 } else {
1068 count1 = runtime->buffer_size - runtime->hw_ptr;
1069 if (count1 > count)
1070 count1 = count;
1071 if (count1 > (int)(runtime->buffer_size - runtime->avail))
1072 count1 = runtime->buffer_size - runtime->avail;
1073 memcpy(buffer, runtime->buffer + runtime->hw_ptr, count1);
1074 count -= count1;
1075 result += count1;
1076 if (count > 0) {
1077 if (count > (int)(runtime->buffer_size - runtime->avail - count1))
1078 count = runtime->buffer_size - runtime->avail - count1;
1079 memcpy(buffer + count1, runtime->buffer, count);
1080 result += count;
1081 }
1082 }
1083 __skip:
1084 spin_unlock_irqrestore(&runtime->lock, flags);
1085 return result;
1086 }
1087
1088 /**
1089 * snd_rawmidi_transmit_ack - acknowledge the transmission
1090 * @substream: the rawmidi substream
1091 * @count: the tranferred count
1092 *
1093 * Advances the hardware pointer for the internal output buffer with
1094 * the given size and updates the condition.
1095 * Call after the transmission is finished.
1096 *
1097 * Returns the advanced size if successful, or a negative error code on failure.
1098 */
1099 int snd_rawmidi_transmit_ack(struct snd_rawmidi_substream *substream, int count)
1100 {
1101 unsigned long flags;
1102 struct snd_rawmidi_runtime *runtime = substream->runtime;
1103
1104 if (runtime->buffer == NULL) {
1105 snd_printd("snd_rawmidi_transmit_ack: output is not active!!!\n");
1106 return -EINVAL;
1107 }
1108 spin_lock_irqsave(&runtime->lock, flags);
1109 snd_BUG_ON(runtime->avail + count > runtime->buffer_size);
1110 runtime->hw_ptr += count;
1111 runtime->hw_ptr %= runtime->buffer_size;
1112 runtime->avail += count;
1113 substream->bytes += count;
1114 if (count > 0) {
1115 if (runtime->drain || snd_rawmidi_ready(substream))
1116 wake_up(&runtime->sleep);
1117 }
1118 spin_unlock_irqrestore(&runtime->lock, flags);
1119 return count;
1120 }
1121
1122 /**
1123 * snd_rawmidi_transmit - copy from the buffer to the device
1124 * @substream: the rawmidi substream
1125 * @buffer: the buffer pointer
1126 * @count: the data size to transfer
1127 *
1128 * Copies data from the buffer to the device and advances the pointer.
1129 *
1130 * Returns the copied size if successful, or a negative error code on failure.
1131 */
1132 int snd_rawmidi_transmit(struct snd_rawmidi_substream *substream,
1133 unsigned char *buffer, int count)
1134 {
1135 if (!substream->opened)
1136 return -EBADFD;
1137 count = snd_rawmidi_transmit_peek(substream, buffer, count);
1138 if (count < 0)
1139 return count;
1140 return snd_rawmidi_transmit_ack(substream, count);
1141 }
1142
1143 static long snd_rawmidi_kernel_write1(struct snd_rawmidi_substream *substream,
1144 const unsigned char __user *userbuf,
1145 const unsigned char *kernelbuf,
1146 long count)
1147 {
1148 unsigned long flags;
1149 long count1, result;
1150 struct snd_rawmidi_runtime *runtime = substream->runtime;
1151
1152 if (snd_BUG_ON(!kernelbuf && !userbuf))
1153 return -EINVAL;
1154 if (snd_BUG_ON(!runtime->buffer))
1155 return -EINVAL;
1156
1157 result = 0;
1158 spin_lock_irqsave(&runtime->lock, flags);
1159 if (substream->append) {
1160 if ((long)runtime->avail < count) {
1161 spin_unlock_irqrestore(&runtime->lock, flags);
1162 return -EAGAIN;
1163 }
1164 }
1165 while (count > 0 && runtime->avail > 0) {
1166 count1 = runtime->buffer_size - runtime->appl_ptr;
1167 if (count1 > count)
1168 count1 = count;
1169 if (count1 > (long)runtime->avail)
1170 count1 = runtime->avail;
1171 if (kernelbuf)
1172 memcpy(runtime->buffer + runtime->appl_ptr,
1173 kernelbuf + result, count1);
1174 else if (userbuf) {
1175 spin_unlock_irqrestore(&runtime->lock, flags);
1176 if (copy_from_user(runtime->buffer + runtime->appl_ptr,
1177 userbuf + result, count1)) {
1178 spin_lock_irqsave(&runtime->lock, flags);
1179 result = result > 0 ? result : -EFAULT;
1180 goto __end;
1181 }
1182 spin_lock_irqsave(&runtime->lock, flags);
1183 }
1184 runtime->appl_ptr += count1;
1185 runtime->appl_ptr %= runtime->buffer_size;
1186 runtime->avail -= count1;
1187 result += count1;
1188 count -= count1;
1189 }
1190 __end:
1191 count1 = runtime->avail < runtime->buffer_size;
1192 spin_unlock_irqrestore(&runtime->lock, flags);
1193 if (count1)
1194 snd_rawmidi_output_trigger(substream, 1);
1195 return result;
1196 }
1197
1198 long snd_rawmidi_kernel_write(struct snd_rawmidi_substream *substream,
1199 const unsigned char *buf, long count)
1200 {
1201 return snd_rawmidi_kernel_write1(substream, NULL, buf, count);
1202 }
1203
1204 static ssize_t snd_rawmidi_write(struct file *file, const char __user *buf,
1205 size_t count, loff_t *offset)
1206 {
1207 long result, timeout;
1208 int count1;
1209 struct snd_rawmidi_file *rfile;
1210 struct snd_rawmidi_runtime *runtime;
1211 struct snd_rawmidi_substream *substream;
1212
1213 rfile = file->private_data;
1214 substream = rfile->output;
1215 runtime = substream->runtime;
1216 /* we cannot put an atomic message to our buffer */
1217 if (substream->append && count > runtime->buffer_size)
1218 return -EIO;
1219 result = 0;
1220 while (count > 0) {
1221 spin_lock_irq(&runtime->lock);
1222 while (!snd_rawmidi_ready_append(substream, count)) {
1223 wait_queue_t wait;
1224 if (file->f_flags & O_NONBLOCK) {
1225 spin_unlock_irq(&runtime->lock);
1226 return result > 0 ? result : -EAGAIN;
1227 }
1228 init_waitqueue_entry(&wait, current);
1229 add_wait_queue(&runtime->sleep, &wait);
1230 set_current_state(TASK_INTERRUPTIBLE);
1231 spin_unlock_irq(&runtime->lock);
1232 timeout = schedule_timeout(30 * HZ);
1233 remove_wait_queue(&runtime->sleep, &wait);
1234 if (signal_pending(current))
1235 return result > 0 ? result : -ERESTARTSYS;
1236 if (!runtime->avail && !timeout)
1237 return result > 0 ? result : -EIO;
1238 spin_lock_irq(&runtime->lock);
1239 }
1240 spin_unlock_irq(&runtime->lock);
1241 count1 = snd_rawmidi_kernel_write1(substream, buf, NULL, count);
1242 if (count1 < 0)
1243 return result > 0 ? result : count1;
1244 result += count1;
1245 buf += count1;
1246 if ((size_t)count1 < count && (file->f_flags & O_NONBLOCK))
1247 break;
1248 count -= count1;
1249 }
1250 if (file->f_flags & O_SYNC) {
1251 spin_lock_irq(&runtime->lock);
1252 while (runtime->avail != runtime->buffer_size) {
1253 wait_queue_t wait;
1254 unsigned int last_avail = runtime->avail;
1255 init_waitqueue_entry(&wait, current);
1256 add_wait_queue(&runtime->sleep, &wait);
1257 set_current_state(TASK_INTERRUPTIBLE);
1258 spin_unlock_irq(&runtime->lock);
1259 timeout = schedule_timeout(30 * HZ);
1260 remove_wait_queue(&runtime->sleep, &wait);
1261 if (signal_pending(current))
1262 return result > 0 ? result : -ERESTARTSYS;
1263 if (runtime->avail == last_avail && !timeout)
1264 return result > 0 ? result : -EIO;
1265 spin_lock_irq(&runtime->lock);
1266 }
1267 spin_unlock_irq(&runtime->lock);
1268 }
1269 return result;
1270 }
1271
1272 static unsigned int snd_rawmidi_poll(struct file *file, poll_table * wait)
1273 {
1274 struct snd_rawmidi_file *rfile;
1275 struct snd_rawmidi_runtime *runtime;
1276 unsigned int mask;
1277
1278 rfile = file->private_data;
1279 if (rfile->input != NULL) {
1280 runtime = rfile->input->runtime;
1281 snd_rawmidi_input_trigger(rfile->input, 1);
1282 poll_wait(file, &runtime->sleep, wait);
1283 }
1284 if (rfile->output != NULL) {
1285 runtime = rfile->output->runtime;
1286 poll_wait(file, &runtime->sleep, wait);
1287 }
1288 mask = 0;
1289 if (rfile->input != NULL) {
1290 if (snd_rawmidi_ready(rfile->input))
1291 mask |= POLLIN | POLLRDNORM;
1292 }
1293 if (rfile->output != NULL) {
1294 if (snd_rawmidi_ready(rfile->output))
1295 mask |= POLLOUT | POLLWRNORM;
1296 }
1297 return mask;
1298 }
1299
1300 /*
1301 */
1302 #ifdef CONFIG_COMPAT
1303 #include "rawmidi_compat.c"
1304 #else
1305 #define snd_rawmidi_ioctl_compat NULL
1306 #endif
1307
1308 /*
1309
1310 */
1311
1312 static void snd_rawmidi_proc_info_read(struct snd_info_entry *entry,
1313 struct snd_info_buffer *buffer)
1314 {
1315 struct snd_rawmidi *rmidi;
1316 struct snd_rawmidi_substream *substream;
1317 struct snd_rawmidi_runtime *runtime;
1318
1319 rmidi = entry->private_data;
1320 snd_iprintf(buffer, "%s\n\n", rmidi->name);
1321 mutex_lock(&rmidi->open_mutex);
1322 if (rmidi->info_flags & SNDRV_RAWMIDI_INFO_OUTPUT) {
1323 list_for_each_entry(substream,
1324 &rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substreams,
1325 list) {
1326 snd_iprintf(buffer,
1327 "Output %d\n"
1328 " Tx bytes : %lu\n",
1329 substream->number,
1330 (unsigned long) substream->bytes);
1331 if (substream->opened) {
1332 runtime = substream->runtime;
1333 snd_iprintf(buffer,
1334 " Mode : %s\n"
1335 " Buffer size : %lu\n"
1336 " Avail : %lu\n",
1337 runtime->oss ? "OSS compatible" : "native",
1338 (unsigned long) runtime->buffer_size,
1339 (unsigned long) runtime->avail);
1340 }
1341 }
1342 }
1343 if (rmidi->info_flags & SNDRV_RAWMIDI_INFO_INPUT) {
1344 list_for_each_entry(substream,
1345 &rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substreams,
1346 list) {
1347 snd_iprintf(buffer,
1348 "Input %d\n"
1349 " Rx bytes : %lu\n",
1350 substream->number,
1351 (unsigned long) substream->bytes);
1352 if (substream->opened) {
1353 runtime = substream->runtime;
1354 snd_iprintf(buffer,
1355 " Buffer size : %lu\n"
1356 " Avail : %lu\n"
1357 " Overruns : %lu\n",
1358 (unsigned long) runtime->buffer_size,
1359 (unsigned long) runtime->avail,
1360 (unsigned long) runtime->xruns);
1361 }
1362 }
1363 }
1364 mutex_unlock(&rmidi->open_mutex);
1365 }
1366
1367 /*
1368 * Register functions
1369 */
1370
1371 static const struct file_operations snd_rawmidi_f_ops =
1372 {
1373 .owner = THIS_MODULE,
1374 .read = snd_rawmidi_read,
1375 .write = snd_rawmidi_write,
1376 .open = snd_rawmidi_open,
1377 .release = snd_rawmidi_release,
1378 .poll = snd_rawmidi_poll,
1379 .unlocked_ioctl = snd_rawmidi_ioctl,
1380 .compat_ioctl = snd_rawmidi_ioctl_compat,
1381 };
1382
1383 static int snd_rawmidi_alloc_substreams(struct snd_rawmidi *rmidi,
1384 struct snd_rawmidi_str *stream,
1385 int direction,
1386 int count)
1387 {
1388 struct snd_rawmidi_substream *substream;
1389 int idx;
1390
1391 for (idx = 0; idx < count; idx++) {
1392 substream = kzalloc(sizeof(*substream), GFP_KERNEL);
1393 if (substream == NULL) {
1394 snd_printk(KERN_ERR "rawmidi: cannot allocate substream\n");
1395 return -ENOMEM;
1396 }
1397 substream->stream = direction;
1398 substream->number = idx;
1399 substream->rmidi = rmidi;
1400 substream->pstr = stream;
1401 list_add_tail(&substream->list, &stream->substreams);
1402 stream->substream_count++;
1403 }
1404 return 0;
1405 }
1406
1407 /**
1408 * snd_rawmidi_new - create a rawmidi instance
1409 * @card: the card instance
1410 * @id: the id string
1411 * @device: the device index
1412 * @output_count: the number of output streams
1413 * @input_count: the number of input streams
1414 * @rrawmidi: the pointer to store the new rawmidi instance
1415 *
1416 * Creates a new rawmidi instance.
1417 * Use snd_rawmidi_set_ops() to set the operators to the new instance.
1418 *
1419 * Returns zero if successful, or a negative error code on failure.
1420 */
1421 int snd_rawmidi_new(struct snd_card *card, char *id, int device,
1422 int output_count, int input_count,
1423 struct snd_rawmidi ** rrawmidi)
1424 {
1425 struct snd_rawmidi *rmidi;
1426 int err;
1427 static struct snd_device_ops ops = {
1428 .dev_free = snd_rawmidi_dev_free,
1429 .dev_register = snd_rawmidi_dev_register,
1430 .dev_disconnect = snd_rawmidi_dev_disconnect,
1431 };
1432
1433 if (snd_BUG_ON(!card))
1434 return -ENXIO;
1435 if (rrawmidi)
1436 *rrawmidi = NULL;
1437 rmidi = kzalloc(sizeof(*rmidi), GFP_KERNEL);
1438 if (rmidi == NULL) {
1439 snd_printk(KERN_ERR "rawmidi: cannot allocate\n");
1440 return -ENOMEM;
1441 }
1442 rmidi->card = card;
1443 rmidi->device = device;
1444 mutex_init(&rmidi->open_mutex);
1445 init_waitqueue_head(&rmidi->open_wait);
1446 INIT_LIST_HEAD(&rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substreams);
1447 INIT_LIST_HEAD(&rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substreams);
1448
1449 if (id != NULL)
1450 strlcpy(rmidi->id, id, sizeof(rmidi->id));
1451 if ((err = snd_rawmidi_alloc_substreams(rmidi,
1452 &rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT],
1453 SNDRV_RAWMIDI_STREAM_INPUT,
1454 input_count)) < 0) {
1455 snd_rawmidi_free(rmidi);
1456 return err;
1457 }
1458 if ((err = snd_rawmidi_alloc_substreams(rmidi,
1459 &rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT],
1460 SNDRV_RAWMIDI_STREAM_OUTPUT,
1461 output_count)) < 0) {
1462 snd_rawmidi_free(rmidi);
1463 return err;
1464 }
1465 if ((err = snd_device_new(card, SNDRV_DEV_RAWMIDI, rmidi, &ops)) < 0) {
1466 snd_rawmidi_free(rmidi);
1467 return err;
1468 }
1469 if (rrawmidi)
1470 *rrawmidi = rmidi;
1471 return 0;
1472 }
1473
1474 static void snd_rawmidi_free_substreams(struct snd_rawmidi_str *stream)
1475 {
1476 struct snd_rawmidi_substream *substream;
1477
1478 while (!list_empty(&stream->substreams)) {
1479 substream = list_entry(stream->substreams.next, struct snd_rawmidi_substream, list);
1480 list_del(&substream->list);
1481 kfree(substream);
1482 }
1483 }
1484
1485 static int snd_rawmidi_free(struct snd_rawmidi *rmidi)
1486 {
1487 if (!rmidi)
1488 return 0;
1489
1490 snd_info_free_entry(rmidi->proc_entry);
1491 rmidi->proc_entry = NULL;
1492 mutex_lock(&register_mutex);
1493 if (rmidi->ops && rmidi->ops->dev_unregister)
1494 rmidi->ops->dev_unregister(rmidi);
1495 mutex_unlock(&register_mutex);
1496
1497 snd_rawmidi_free_substreams(&rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT]);
1498 snd_rawmidi_free_substreams(&rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT]);
1499 if (rmidi->private_free)
1500 rmidi->private_free(rmidi);
1501 kfree(rmidi);
1502 return 0;
1503 }
1504
1505 static int snd_rawmidi_dev_free(struct snd_device *device)
1506 {
1507 struct snd_rawmidi *rmidi = device->device_data;
1508 return snd_rawmidi_free(rmidi);
1509 }
1510
1511 #if defined(CONFIG_SND_SEQUENCER) || (defined(MODULE) && defined(CONFIG_SND_SEQUENCER_MODULE))
1512 static void snd_rawmidi_dev_seq_free(struct snd_seq_device *device)
1513 {
1514 struct snd_rawmidi *rmidi = device->private_data;
1515 rmidi->seq_dev = NULL;
1516 }
1517 #endif
1518
1519 static int snd_rawmidi_dev_register(struct snd_device *device)
1520 {
1521 int err;
1522 struct snd_info_entry *entry;
1523 char name[16];
1524 struct snd_rawmidi *rmidi = device->device_data;
1525
1526 if (rmidi->device >= SNDRV_RAWMIDI_DEVICES)
1527 return -ENOMEM;
1528 mutex_lock(&register_mutex);
1529 if (snd_rawmidi_search(rmidi->card, rmidi->device)) {
1530 mutex_unlock(&register_mutex);
1531 return -EBUSY;
1532 }
1533 list_add_tail(&rmidi->list, &snd_rawmidi_devices);
1534 sprintf(name, "midiC%iD%i", rmidi->card->number, rmidi->device);
1535 if ((err = snd_register_device(SNDRV_DEVICE_TYPE_RAWMIDI,
1536 rmidi->card, rmidi->device,
1537 &snd_rawmidi_f_ops, rmidi, name)) < 0) {
1538 snd_printk(KERN_ERR "unable to register rawmidi device %i:%i\n", rmidi->card->number, rmidi->device);
1539 list_del(&rmidi->list);
1540 mutex_unlock(&register_mutex);
1541 return err;
1542 }
1543 if (rmidi->ops && rmidi->ops->dev_register &&
1544 (err = rmidi->ops->dev_register(rmidi)) < 0) {
1545 snd_unregister_device(SNDRV_DEVICE_TYPE_RAWMIDI, rmidi->card, rmidi->device);
1546 list_del(&rmidi->list);
1547 mutex_unlock(&register_mutex);
1548 return err;
1549 }
1550 #ifdef CONFIG_SND_OSSEMUL
1551 rmidi->ossreg = 0;
1552 if ((int)rmidi->device == midi_map[rmidi->card->number]) {
1553 if (snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_MIDI,
1554 rmidi->card, 0, &snd_rawmidi_f_ops,
1555 rmidi, name) < 0) {
1556 snd_printk(KERN_ERR "unable to register OSS rawmidi device %i:%i\n", rmidi->card->number, 0);
1557 } else {
1558 rmidi->ossreg++;
1559 #ifdef SNDRV_OSS_INFO_DEV_MIDI
1560 snd_oss_info_register(SNDRV_OSS_INFO_DEV_MIDI, rmidi->card->number, rmidi->name);
1561 #endif
1562 }
1563 }
1564 if ((int)rmidi->device == amidi_map[rmidi->card->number]) {
1565 if (snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_MIDI,
1566 rmidi->card, 1, &snd_rawmidi_f_ops,
1567 rmidi, name) < 0) {
1568 snd_printk(KERN_ERR "unable to register OSS rawmidi device %i:%i\n", rmidi->card->number, 1);
1569 } else {
1570 rmidi->ossreg++;
1571 }
1572 }
1573 #endif /* CONFIG_SND_OSSEMUL */
1574 mutex_unlock(&register_mutex);
1575 sprintf(name, "midi%d", rmidi->device);
1576 entry = snd_info_create_card_entry(rmidi->card, name, rmidi->card->proc_root);
1577 if (entry) {
1578 entry->private_data = rmidi;
1579 entry->c.text.read = snd_rawmidi_proc_info_read;
1580 if (snd_info_register(entry) < 0) {
1581 snd_info_free_entry(entry);
1582 entry = NULL;
1583 }
1584 }
1585 rmidi->proc_entry = entry;
1586 #if defined(CONFIG_SND_SEQUENCER) || (defined(MODULE) && defined(CONFIG_SND_SEQUENCER_MODULE))
1587 if (!rmidi->ops || !rmidi->ops->dev_register) { /* own registration mechanism */
1588 if (snd_seq_device_new(rmidi->card, rmidi->device, SNDRV_SEQ_DEV_ID_MIDISYNTH, 0, &rmidi->seq_dev) >= 0) {
1589 rmidi->seq_dev->private_data = rmidi;
1590 rmidi->seq_dev->private_free = snd_rawmidi_dev_seq_free;
1591 sprintf(rmidi->seq_dev->name, "MIDI %d-%d", rmidi->card->number, rmidi->device);
1592 snd_device_register(rmidi->card, rmidi->seq_dev);
1593 }
1594 }
1595 #endif
1596 return 0;
1597 }
1598
1599 static int snd_rawmidi_dev_disconnect(struct snd_device *device)
1600 {
1601 struct snd_rawmidi *rmidi = device->device_data;
1602
1603 mutex_lock(&register_mutex);
1604 list_del_init(&rmidi->list);
1605 #ifdef CONFIG_SND_OSSEMUL
1606 if (rmidi->ossreg) {
1607 if ((int)rmidi->device == midi_map[rmidi->card->number]) {
1608 snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_MIDI, rmidi->card, 0);
1609 #ifdef SNDRV_OSS_INFO_DEV_MIDI
1610 snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_MIDI, rmidi->card->number);
1611 #endif
1612 }
1613 if ((int)rmidi->device == amidi_map[rmidi->card->number])
1614 snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_MIDI, rmidi->card, 1);
1615 rmidi->ossreg = 0;
1616 }
1617 #endif /* CONFIG_SND_OSSEMUL */
1618 snd_unregister_device(SNDRV_DEVICE_TYPE_RAWMIDI, rmidi->card, rmidi->device);
1619 mutex_unlock(&register_mutex);
1620 return 0;
1621 }
1622
1623 /**
1624 * snd_rawmidi_set_ops - set the rawmidi operators
1625 * @rmidi: the rawmidi instance
1626 * @stream: the stream direction, SNDRV_RAWMIDI_STREAM_XXX
1627 * @ops: the operator table
1628 *
1629 * Sets the rawmidi operators for the given stream direction.
1630 */
1631 void snd_rawmidi_set_ops(struct snd_rawmidi *rmidi, int stream,
1632 struct snd_rawmidi_ops *ops)
1633 {
1634 struct snd_rawmidi_substream *substream;
1635
1636 list_for_each_entry(substream, &rmidi->streams[stream].substreams, list)
1637 substream->ops = ops;
1638 }
1639
1640 /*
1641 * ENTRY functions
1642 */
1643
1644 static int __init alsa_rawmidi_init(void)
1645 {
1646
1647 snd_ctl_register_ioctl(snd_rawmidi_control_ioctl);
1648 snd_ctl_register_ioctl_compat(snd_rawmidi_control_ioctl);
1649 #ifdef CONFIG_SND_OSSEMUL
1650 { int i;
1651 /* check device map table */
1652 for (i = 0; i < SNDRV_CARDS; i++) {
1653 if (midi_map[i] < 0 || midi_map[i] >= SNDRV_RAWMIDI_DEVICES) {
1654 snd_printk(KERN_ERR "invalid midi_map[%d] = %d\n", i, midi_map[i]);
1655 midi_map[i] = 0;
1656 }
1657 if (amidi_map[i] < 0 || amidi_map[i] >= SNDRV_RAWMIDI_DEVICES) {
1658 snd_printk(KERN_ERR "invalid amidi_map[%d] = %d\n", i, amidi_map[i]);
1659 amidi_map[i] = 1;
1660 }
1661 }
1662 }
1663 #endif /* CONFIG_SND_OSSEMUL */
1664 return 0;
1665 }
1666
1667 static void __exit alsa_rawmidi_exit(void)
1668 {
1669 snd_ctl_unregister_ioctl(snd_rawmidi_control_ioctl);
1670 snd_ctl_unregister_ioctl_compat(snd_rawmidi_control_ioctl);
1671 }
1672
1673 module_init(alsa_rawmidi_init)
1674 module_exit(alsa_rawmidi_exit)
1675
1676 EXPORT_SYMBOL(snd_rawmidi_output_params);
1677 EXPORT_SYMBOL(snd_rawmidi_input_params);
1678 EXPORT_SYMBOL(snd_rawmidi_drop_output);
1679 EXPORT_SYMBOL(snd_rawmidi_drain_output);
1680 EXPORT_SYMBOL(snd_rawmidi_drain_input);
1681 EXPORT_SYMBOL(snd_rawmidi_receive);
1682 EXPORT_SYMBOL(snd_rawmidi_transmit_empty);
1683 EXPORT_SYMBOL(snd_rawmidi_transmit_peek);
1684 EXPORT_SYMBOL(snd_rawmidi_transmit_ack);
1685 EXPORT_SYMBOL(snd_rawmidi_transmit);
1686 EXPORT_SYMBOL(snd_rawmidi_new);
1687 EXPORT_SYMBOL(snd_rawmidi_set_ops);
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);
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree