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authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 18:20:36 -0400
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 18:20:36 -0400
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /sound/core/rawmidi.c
Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
Diffstat (limited to 'sound/core/rawmidi.c')
-rw-r--r--sound/core/rawmidi.c1680
1 files changed, 1680 insertions, 0 deletions
diff --git a/sound/core/rawmidi.c b/sound/core/rawmidi.c
new file mode 100644
index 000000000000..edba4118271c
--- /dev/null
+++ b/sound/core/rawmidi.c
@@ -0,0 +1,1680 @@
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
40MODULE_AUTHOR("Jaroslav Kysela <perex@suse.cz>");
41MODULE_DESCRIPTION("Midlevel RawMidi code for ALSA.");
42MODULE_LICENSE("GPL");
43
44#ifdef CONFIG_SND_OSSEMUL
45static int midi_map[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS-1)] = 0};
46static int amidi_map[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS-1)] = 1};
47module_param_array(midi_map, int, NULL, 0444);
48MODULE_PARM_DESC(midi_map, "Raw MIDI device number assigned to 1st OSS device.");
49module_param_array(amidi_map, int, NULL, 0444);
50MODULE_PARM_DESC(amidi_map, "Raw MIDI device number assigned to 2nd OSS device.");
51#endif /* CONFIG_SND_OSSEMUL */
52
53static int snd_rawmidi_free(snd_rawmidi_t *rawmidi);
54static int snd_rawmidi_dev_free(snd_device_t *device);
55static int snd_rawmidi_dev_register(snd_device_t *device);
56static int snd_rawmidi_dev_disconnect(snd_device_t *device);
57static int snd_rawmidi_dev_unregister(snd_device_t *device);
58
59static snd_rawmidi_t *snd_rawmidi_devices[SNDRV_CARDS * SNDRV_RAWMIDI_DEVICES];
60
61static DECLARE_MUTEX(register_mutex);
62
63static 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
75static inline int snd_rawmidi_ready(snd_rawmidi_substream_t * substream)
76{
77 snd_rawmidi_runtime_t *runtime = substream->runtime;
78 return runtime->avail >= runtime->avail_min;
79}
80
81static inline int snd_rawmidi_ready_append(snd_rawmidi_substream_t * substream, size_t count)
82{
83 snd_rawmidi_runtime_t *runtime = substream->runtime;
84 return runtime->avail >= runtime->avail_min &&
85 (!substream->append || runtime->avail >= count);
86}
87
88static void snd_rawmidi_input_event_tasklet(unsigned long data)
89{
90 snd_rawmidi_substream_t *substream = (snd_rawmidi_substream_t *)data;
91 substream->runtime->event(substream);
92}
93
94static void snd_rawmidi_output_trigger_tasklet(unsigned long data)
95{
96 snd_rawmidi_substream_t *substream = (snd_rawmidi_substream_t *)data;
97 substream->ops->trigger(substream, 1);
98}
99
100static int snd_rawmidi_runtime_create(snd_rawmidi_substream_t * substream)
101{
102 snd_rawmidi_runtime_t *runtime;
103
104 if ((runtime = kcalloc(1, sizeof(*runtime), GFP_KERNEL)) == NULL)
105 return -ENOMEM;
106 spin_lock_init(&runtime->lock);
107 init_waitqueue_head(&runtime->sleep);
108 if (substream->stream == SNDRV_RAWMIDI_STREAM_INPUT)
109 tasklet_init(&runtime->tasklet,
110 snd_rawmidi_input_event_tasklet,
111 (unsigned long)substream);
112 else
113 tasklet_init(&runtime->tasklet,
114 snd_rawmidi_output_trigger_tasklet,
115 (unsigned long)substream);
116 runtime->event = NULL;
117 runtime->buffer_size = PAGE_SIZE;
118 runtime->avail_min = 1;
119 if (substream->stream == SNDRV_RAWMIDI_STREAM_INPUT)
120 runtime->avail = 0;
121 else
122 runtime->avail = runtime->buffer_size;
123 if ((runtime->buffer = kmalloc(runtime->buffer_size, GFP_KERNEL)) == NULL) {
124 kfree(runtime);
125 return -ENOMEM;
126 }
127 runtime->appl_ptr = runtime->hw_ptr = 0;
128 substream->runtime = runtime;
129 return 0;
130}
131
132static int snd_rawmidi_runtime_free(snd_rawmidi_substream_t * substream)
133{
134 snd_rawmidi_runtime_t *runtime = substream->runtime;
135
136 kfree(runtime->buffer);
137 kfree(runtime);
138 substream->runtime = NULL;
139 return 0;
140}
141
142static inline void snd_rawmidi_output_trigger(snd_rawmidi_substream_t * substream, int up)
143{
144 if (up) {
145 tasklet_hi_schedule(&substream->runtime->tasklet);
146 } else {
147 tasklet_kill(&substream->runtime->tasklet);
148 substream->ops->trigger(substream, 0);
149 }
150}
151
152static void snd_rawmidi_input_trigger(snd_rawmidi_substream_t * substream, int up)
153{
154 substream->ops->trigger(substream, up);
155 if (!up && substream->runtime->event)
156 tasklet_kill(&substream->runtime->tasklet);
157}
158
159int snd_rawmidi_drop_output(snd_rawmidi_substream_t * substream)
160{
161 unsigned long flags;
162 snd_rawmidi_runtime_t *runtime = substream->runtime;
163
164 snd_rawmidi_output_trigger(substream, 0);
165 runtime->drain = 0;
166 spin_lock_irqsave(&runtime->lock, flags);
167 runtime->appl_ptr = runtime->hw_ptr = 0;
168 runtime->avail = runtime->buffer_size;
169 spin_unlock_irqrestore(&runtime->lock, flags);
170 return 0;
171}
172
173int snd_rawmidi_drain_output(snd_rawmidi_substream_t * substream)
174{
175 int err;
176 long timeout;
177 snd_rawmidi_runtime_t *runtime = substream->runtime;
178
179 err = 0;
180 runtime->drain = 1;
181 timeout = wait_event_interruptible_timeout(runtime->sleep,
182 (runtime->avail >= runtime->buffer_size),
183 10*HZ);
184 if (signal_pending(current))
185 err = -ERESTARTSYS;
186 if (runtime->avail < runtime->buffer_size && !timeout) {
187 snd_printk(KERN_WARNING "rawmidi drain error (avail = %li, buffer_size = %li)\n", (long)runtime->avail, (long)runtime->buffer_size);
188 err = -EIO;
189 }
190 runtime->drain = 0;
191 if (err != -ERESTARTSYS) {
192 /* we need wait a while to make sure that Tx FIFOs are empty */
193 if (substream->ops->drain)
194 substream->ops->drain(substream);
195 else
196 msleep(50);
197 snd_rawmidi_drop_output(substream);
198 }
199 return err;
200}
201
202int snd_rawmidi_drain_input(snd_rawmidi_substream_t * substream)
203{
204 unsigned long flags;
205 snd_rawmidi_runtime_t *runtime = substream->runtime;
206
207 snd_rawmidi_input_trigger(substream, 0);
208 runtime->drain = 0;
209 spin_lock_irqsave(&runtime->lock, flags);
210 runtime->appl_ptr = runtime->hw_ptr = 0;
211 runtime->avail = 0;
212 spin_unlock_irqrestore(&runtime->lock, flags);
213 return 0;
214}
215
216int snd_rawmidi_kernel_open(int cardnum, int device, int subdevice,
217 int mode, snd_rawmidi_file_t * rfile)
218{
219 snd_rawmidi_t *rmidi;
220 struct list_head *list1, *list2;
221 snd_rawmidi_substream_t *sinput = NULL, *soutput = NULL;
222 snd_rawmidi_runtime_t *input = NULL, *output = NULL;
223 int err;
224
225 if (rfile)
226 rfile->input = rfile->output = NULL;
227 rmidi = snd_rawmidi_devices[(cardnum * SNDRV_RAWMIDI_DEVICES) + device];
228 if (rmidi == NULL) {
229 err = -ENODEV;
230 goto __error1;
231 }
232 if (!try_module_get(rmidi->card->module)) {
233 err = -EFAULT;
234 goto __error1;
235 }
236 if (!(mode & SNDRV_RAWMIDI_LFLG_NOOPENLOCK))
237 down(&rmidi->open_mutex);
238 if (mode & SNDRV_RAWMIDI_LFLG_INPUT) {
239 if (!(rmidi->info_flags & SNDRV_RAWMIDI_INFO_INPUT)) {
240 err = -ENXIO;
241 goto __error;
242 }
243 if (subdevice >= 0 && (unsigned int)subdevice >= rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substream_count) {
244 err = -ENODEV;
245 goto __error;
246 }
247 if (rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substream_opened >=
248 rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substream_count) {
249 err = -EAGAIN;
250 goto __error;
251 }
252 }
253 if (mode & SNDRV_RAWMIDI_LFLG_OUTPUT) {
254 if (!(rmidi->info_flags & SNDRV_RAWMIDI_INFO_OUTPUT)) {
255 err = -ENXIO;
256 goto __error;
257 }
258 if (subdevice >= 0 && (unsigned int)subdevice >= rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substream_count) {
259 err = -ENODEV;
260 goto __error;
261 }
262 if (rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substream_opened >=
263 rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substream_count) {
264 err = -EAGAIN;
265 goto __error;
266 }
267 }
268 list1 = rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substreams.next;
269 while (1) {
270 if (list1 == &rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substreams) {
271 sinput = NULL;
272 if (mode & SNDRV_RAWMIDI_LFLG_INPUT) {
273 err = -EAGAIN;
274 goto __error;
275 }
276 break;
277 }
278 sinput = list_entry(list1, snd_rawmidi_substream_t, list);
279 if ((mode & SNDRV_RAWMIDI_LFLG_INPUT) && sinput->opened)
280 goto __nexti;
281 if (subdevice < 0 || (subdevice >= 0 && subdevice == sinput->number))
282 break;
283 __nexti:
284 list1 = list1->next;
285 }
286 list2 = rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substreams.next;
287 while (1) {
288 if (list2 == &rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substreams) {
289 soutput = NULL;
290 if (mode & SNDRV_RAWMIDI_LFLG_OUTPUT) {
291 err = -EAGAIN;
292 goto __error;
293 }
294 break;
295 }
296 soutput = list_entry(list2, snd_rawmidi_substream_t, list);
297 if (mode & SNDRV_RAWMIDI_LFLG_OUTPUT) {
298 if (mode & SNDRV_RAWMIDI_LFLG_APPEND) {
299 if (soutput->opened && !soutput->append)
300 goto __nexto;
301 } else {
302 if (soutput->opened)
303 goto __nexto;
304 }
305 }
306 if (subdevice < 0 || (subdevice >= 0 && subdevice == soutput->number))
307 break;
308 __nexto:
309 list2 = list2->next;
310 }
311 if (mode & SNDRV_RAWMIDI_LFLG_INPUT) {
312 if ((err = snd_rawmidi_runtime_create(sinput)) < 0)
313 goto __error;
314 input = sinput->runtime;
315 if ((err = sinput->ops->open(sinput)) < 0)
316 goto __error;
317 sinput->opened = 1;
318 rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substream_opened++;
319 } else {
320 sinput = NULL;
321 }
322 if (mode & SNDRV_RAWMIDI_LFLG_OUTPUT) {
323 if (soutput->opened)
324 goto __skip_output;
325 if ((err = snd_rawmidi_runtime_create(soutput)) < 0) {
326 if (mode & SNDRV_RAWMIDI_LFLG_INPUT)
327 sinput->ops->close(sinput);
328 goto __error;
329 }
330 output = soutput->runtime;
331 if ((err = soutput->ops->open(soutput)) < 0) {
332 if (mode & SNDRV_RAWMIDI_LFLG_INPUT)
333 sinput->ops->close(sinput);
334 goto __error;
335 }
336 __skip_output:
337 soutput->opened = 1;
338 if (mode & SNDRV_RAWMIDI_LFLG_APPEND)
339 soutput->append = 1;
340 if (soutput->use_count++ == 0)
341 soutput->active_sensing = 1;
342 rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substream_opened++;
343 } else {
344 soutput = NULL;
345 }
346 if (!(mode & SNDRV_RAWMIDI_LFLG_NOOPENLOCK))
347 up(&rmidi->open_mutex);
348 if (rfile) {
349 rfile->rmidi = rmidi;
350 rfile->input = sinput;
351 rfile->output = soutput;
352 }
353 return 0;
354
355 __error:
356 if (input != NULL)
357 snd_rawmidi_runtime_free(sinput);
358 if (output != NULL)
359 snd_rawmidi_runtime_free(soutput);
360 module_put(rmidi->card->module);
361 if (!(mode & SNDRV_RAWMIDI_LFLG_NOOPENLOCK))
362 up(&rmidi->open_mutex);
363 __error1:
364 return err;
365}
366
367static int snd_rawmidi_open(struct inode *inode, struct file *file)
368{
369 int maj = imajor(inode);
370 int cardnum;
371 snd_card_t *card;
372 int device, subdevice;
373 unsigned short fflags;
374 int err;
375 snd_rawmidi_t *rmidi;
376 snd_rawmidi_file_t *rawmidi_file;
377 wait_queue_t wait;
378 struct list_head *list;
379 snd_ctl_file_t *kctl;
380
381 switch (maj) {
382 case CONFIG_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 break;
388#ifdef CONFIG_SND_OSSEMUL
389 case SOUND_MAJOR:
390 cardnum = SNDRV_MINOR_OSS_CARD(iminor(inode));
391 cardnum %= SNDRV_CARDS;
392 device = SNDRV_MINOR_OSS_DEVICE(iminor(inode)) == SNDRV_MINOR_OSS_MIDI ?
393 midi_map[cardnum] : amidi_map[cardnum];
394 break;
395#endif
396 default:
397 return -ENXIO;
398 }
399
400 rmidi = snd_rawmidi_devices[(cardnum * SNDRV_RAWMIDI_DEVICES) + device];
401 if (rmidi == NULL)
402 return -ENODEV;
403#ifdef CONFIG_SND_OSSEMUL
404 if (maj == SOUND_MAJOR && !rmidi->ossreg)
405 return -ENXIO;
406#endif
407 if ((file->f_flags & O_APPEND) && !(file->f_flags & O_NONBLOCK))
408 return -EINVAL; /* invalid combination */
409 card = rmidi->card;
410 err = snd_card_file_add(card, file);
411 if (err < 0)
412 return -ENODEV;
413 fflags = snd_rawmidi_file_flags(file);
414 if ((file->f_flags & O_APPEND) || maj != CONFIG_SND_MAJOR) /* OSS emul? */
415 fflags |= SNDRV_RAWMIDI_LFLG_APPEND;
416 fflags |= SNDRV_RAWMIDI_LFLG_NOOPENLOCK;
417 rawmidi_file = kmalloc(sizeof(*rawmidi_file), GFP_KERNEL);
418 if (rawmidi_file == NULL) {
419 snd_card_file_remove(card, file);
420 return -ENOMEM;
421 }
422 init_waitqueue_entry(&wait, current);
423 add_wait_queue(&rmidi->open_wait, &wait);
424 down(&rmidi->open_mutex);
425 while (1) {
426 subdevice = -1;
427 down_read(&card->controls_rwsem);
428 list_for_each(list, &card->ctl_files) {
429 kctl = snd_ctl_file(list);
430 if (kctl->pid == current->pid) {
431 subdevice = kctl->prefer_rawmidi_subdevice;
432 break;
433 }
434 }
435 up_read(&card->controls_rwsem);
436 err = snd_rawmidi_kernel_open(cardnum, device, subdevice, fflags, rawmidi_file);
437 if (err >= 0)
438 break;
439 if (err == -EAGAIN) {
440 if (file->f_flags & O_NONBLOCK) {
441 err = -EBUSY;
442 break;
443 }
444 } else
445 break;
446 set_current_state(TASK_INTERRUPTIBLE);
447 up(&rmidi->open_mutex);
448 schedule();
449 down(&rmidi->open_mutex);
450 if (signal_pending(current)) {
451 err = -ERESTARTSYS;
452 break;
453 }
454 }
455#ifdef CONFIG_SND_OSSEMUL
456 if (rawmidi_file->input && rawmidi_file->input->runtime)
457 rawmidi_file->input->runtime->oss = (maj == SOUND_MAJOR);
458 if (rawmidi_file->output && rawmidi_file->output->runtime)
459 rawmidi_file->output->runtime->oss = (maj == SOUND_MAJOR);
460#endif
461 remove_wait_queue(&rmidi->open_wait, &wait);
462 if (err >= 0) {
463 file->private_data = rawmidi_file;
464 } else {
465 snd_card_file_remove(card, file);
466 kfree(rawmidi_file);
467 }
468 up(&rmidi->open_mutex);
469 return err;
470}
471
472int snd_rawmidi_kernel_release(snd_rawmidi_file_t * rfile)
473{
474 snd_rawmidi_t *rmidi;
475 snd_rawmidi_substream_t *substream;
476 snd_rawmidi_runtime_t *runtime;
477
478 snd_assert(rfile != NULL, return -ENXIO);
479 snd_assert(rfile->input != NULL || rfile->output != NULL, return -ENXIO);
480 rmidi = rfile->rmidi;
481 down(&rmidi->open_mutex);
482 if (rfile->input != NULL) {
483 substream = rfile->input;
484 rfile->input = NULL;
485 runtime = substream->runtime;
486 snd_rawmidi_input_trigger(substream, 0);
487 substream->ops->close(substream);
488 if (runtime->private_free != NULL)
489 runtime->private_free(substream);
490 snd_rawmidi_runtime_free(substream);
491 substream->opened = 0;
492 rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substream_opened--;
493 }
494 if (rfile->output != NULL) {
495 substream = rfile->output;
496 rfile->output = NULL;
497 if (--substream->use_count == 0) {
498 runtime = substream->runtime;
499 if (substream->active_sensing) {
500 unsigned char buf = 0xfe;
501 /* sending single active sensing message to shut the device up */
502 snd_rawmidi_kernel_write(substream, &buf, 1);
503 }
504 if (snd_rawmidi_drain_output(substream) == -ERESTARTSYS)
505 snd_rawmidi_output_trigger(substream, 0);
506 substream->ops->close(substream);
507 if (runtime->private_free != NULL)
508 runtime->private_free(substream);
509 snd_rawmidi_runtime_free(substream);
510 substream->opened = 0;
511 substream->append = 0;
512 }
513 rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substream_opened--;
514 }
515 up(&rmidi->open_mutex);
516 module_put(rmidi->card->module);
517 return 0;
518}
519
520static int snd_rawmidi_release(struct inode *inode, struct file *file)
521{
522 snd_rawmidi_file_t *rfile;
523 snd_rawmidi_t *rmidi;
524 int err;
525
526 rfile = file->private_data;
527 err = snd_rawmidi_kernel_release(rfile);
528 rmidi = rfile->rmidi;
529 wake_up(&rmidi->open_wait);
530 kfree(rfile);
531 snd_card_file_remove(rmidi->card, file);
532 return err;
533}
534
535int snd_rawmidi_info(snd_rawmidi_substream_t *substream, snd_rawmidi_info_t *info)
536{
537 snd_rawmidi_t *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
557static int snd_rawmidi_info_user(snd_rawmidi_substream_t *substream, snd_rawmidi_info_t __user * _info)
558{
559 snd_rawmidi_info_t info;
560 int err;
561 if ((err = snd_rawmidi_info(substream, &info)) < 0)
562 return err;
563 if (copy_to_user(_info, &info, sizeof(snd_rawmidi_info_t)))
564 return -EFAULT;
565 return 0;
566}
567
568int snd_rawmidi_info_select(snd_card_t *card, snd_rawmidi_info_t *info)
569{
570 snd_rawmidi_t *rmidi;
571 snd_rawmidi_str_t *pstr;
572 snd_rawmidi_substream_t *substream;
573 struct list_head *list;
574 if (info->device >= SNDRV_RAWMIDI_DEVICES)
575 return -ENXIO;
576 rmidi = snd_rawmidi_devices[card->number * SNDRV_RAWMIDI_DEVICES + info->device];
577 if (info->stream < 0 || info->stream > 1)
578 return -EINVAL;
579 pstr = &rmidi->streams[info->stream];
580 if (pstr->substream_count == 0)
581 return -ENOENT;
582 if (info->subdevice >= pstr->substream_count)
583 return -ENXIO;
584 list_for_each(list, &pstr->substreams) {
585 substream = list_entry(list, snd_rawmidi_substream_t, list);
586 if ((unsigned int)substream->number == info->subdevice)
587 return snd_rawmidi_info(substream, info);
588 }
589 return -ENXIO;
590}
591
592static int snd_rawmidi_info_select_user(snd_card_t *card,
593 snd_rawmidi_info_t __user *_info)
594{
595 int err;
596 snd_rawmidi_info_t info;
597 if (get_user(info.device, &_info->device))
598 return -EFAULT;
599 if (get_user(info.stream, &_info->stream))
600 return -EFAULT;
601 if (get_user(info.subdevice, &_info->subdevice))
602 return -EFAULT;
603 if ((err = snd_rawmidi_info_select(card, &info)) < 0)
604 return err;
605 if (copy_to_user(_info, &info, sizeof(snd_rawmidi_info_t)))
606 return -EFAULT;
607 return 0;
608}
609
610int snd_rawmidi_output_params(snd_rawmidi_substream_t * substream,
611 snd_rawmidi_params_t * params)
612{
613 char *newbuf;
614 snd_rawmidi_runtime_t *runtime = substream->runtime;
615
616 if (substream->append && substream->use_count > 1)
617 return -EBUSY;
618 snd_rawmidi_drain_output(substream);
619 if (params->buffer_size < 32 || params->buffer_size > 1024L * 1024L) {
620 return -EINVAL;
621 }
622 if (params->avail_min < 1 || params->avail_min > params->buffer_size) {
623 return -EINVAL;
624 }
625 if (params->buffer_size != runtime->buffer_size) {
626 if ((newbuf = (char *) kmalloc(params->buffer_size, GFP_KERNEL)) == NULL)
627 return -ENOMEM;
628 kfree(runtime->buffer);
629 runtime->buffer = newbuf;
630 runtime->buffer_size = params->buffer_size;
631 }
632 runtime->avail_min = params->avail_min;
633 substream->active_sensing = !params->no_active_sensing;
634 return 0;
635}
636
637int snd_rawmidi_input_params(snd_rawmidi_substream_t * substream,
638 snd_rawmidi_params_t * params)
639{
640 char *newbuf;
641 snd_rawmidi_runtime_t *runtime = substream->runtime;
642
643 snd_rawmidi_drain_input(substream);
644 if (params->buffer_size < 32 || params->buffer_size > 1024L * 1024L) {
645 return -EINVAL;
646 }
647 if (params->avail_min < 1 || params->avail_min > params->buffer_size) {
648 return -EINVAL;
649 }
650 if (params->buffer_size != runtime->buffer_size) {
651 if ((newbuf = (char *) kmalloc(params->buffer_size, GFP_KERNEL)) == NULL)
652 return -ENOMEM;
653 kfree(runtime->buffer);
654 runtime->buffer = newbuf;
655 runtime->buffer_size = params->buffer_size;
656 }
657 runtime->avail_min = params->avail_min;
658 return 0;
659}
660
661static int snd_rawmidi_output_status(snd_rawmidi_substream_t * substream,
662 snd_rawmidi_status_t * status)
663{
664 snd_rawmidi_runtime_t *runtime = substream->runtime;
665
666 memset(status, 0, sizeof(*status));
667 status->stream = SNDRV_RAWMIDI_STREAM_OUTPUT;
668 spin_lock_irq(&runtime->lock);
669 status->avail = runtime->avail;
670 spin_unlock_irq(&runtime->lock);
671 return 0;
672}
673
674static int snd_rawmidi_input_status(snd_rawmidi_substream_t * substream,
675 snd_rawmidi_status_t * status)
676{
677 snd_rawmidi_runtime_t *runtime = substream->runtime;
678
679 memset(status, 0, sizeof(*status));
680 status->stream = SNDRV_RAWMIDI_STREAM_INPUT;
681 spin_lock_irq(&runtime->lock);
682 status->avail = runtime->avail;
683 status->xruns = runtime->xruns;
684 runtime->xruns = 0;
685 spin_unlock_irq(&runtime->lock);
686 return 0;
687}
688
689static long snd_rawmidi_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
690{
691 snd_rawmidi_file_t *rfile;
692 void __user *argp = (void __user *)arg;
693
694 rfile = file->private_data;
695 if (((cmd >> 8) & 0xff) != 'W')
696 return -ENOTTY;
697 switch (cmd) {
698 case SNDRV_RAWMIDI_IOCTL_PVERSION:
699 return put_user(SNDRV_RAWMIDI_VERSION, (int __user *)argp) ? -EFAULT : 0;
700 case SNDRV_RAWMIDI_IOCTL_INFO:
701 {
702 snd_rawmidi_stream_t stream;
703 snd_rawmidi_info_t __user *info = argp;
704 if (get_user(stream, &info->stream))
705 return -EFAULT;
706 switch (stream) {
707 case SNDRV_RAWMIDI_STREAM_INPUT:
708 return snd_rawmidi_info_user(rfile->input, info);
709 case SNDRV_RAWMIDI_STREAM_OUTPUT:
710 return snd_rawmidi_info_user(rfile->output, info);
711 default:
712 return -EINVAL;
713 }
714 }
715 case SNDRV_RAWMIDI_IOCTL_PARAMS:
716 {
717 snd_rawmidi_params_t params;
718 if (copy_from_user(&params, argp, sizeof(snd_rawmidi_params_t)))
719 return -EFAULT;
720 switch (params.stream) {
721 case SNDRV_RAWMIDI_STREAM_OUTPUT:
722 if (rfile->output == NULL)
723 return -EINVAL;
724 return snd_rawmidi_output_params(rfile->output, &params);
725 case SNDRV_RAWMIDI_STREAM_INPUT:
726 if (rfile->input == NULL)
727 return -EINVAL;
728 return snd_rawmidi_input_params(rfile->input, &params);
729 default:
730 return -EINVAL;
731 }
732 }
733 case SNDRV_RAWMIDI_IOCTL_STATUS:
734 {
735 int err = 0;
736 snd_rawmidi_status_t status;
737 if (copy_from_user(&status, argp, sizeof(snd_rawmidi_status_t)))
738 return -EFAULT;
739 switch (status.stream) {
740 case SNDRV_RAWMIDI_STREAM_OUTPUT:
741 if (rfile->output == NULL)
742 return -EINVAL;
743 err = snd_rawmidi_output_status(rfile->output, &status);
744 break;
745 case SNDRV_RAWMIDI_STREAM_INPUT:
746 if (rfile->input == NULL)
747 return -EINVAL;
748 err = snd_rawmidi_input_status(rfile->input, &status);
749 break;
750 default:
751 return -EINVAL;
752 }
753 if (err < 0)
754 return err;
755 if (copy_to_user(argp, &status, sizeof(snd_rawmidi_status_t)))
756 return -EFAULT;
757 return 0;
758 }
759 case SNDRV_RAWMIDI_IOCTL_DROP:
760 {
761 int val;
762 if (get_user(val, (int __user *) argp))
763 return -EFAULT;
764 switch (val) {
765 case SNDRV_RAWMIDI_STREAM_OUTPUT:
766 if (rfile->output == NULL)
767 return -EINVAL;
768 return snd_rawmidi_drop_output(rfile->output);
769 default:
770 return -EINVAL;
771 }
772 }
773 case SNDRV_RAWMIDI_IOCTL_DRAIN:
774 {
775 int val;
776 if (get_user(val, (int __user *) argp))
777 return -EFAULT;
778 switch (val) {
779 case SNDRV_RAWMIDI_STREAM_OUTPUT:
780 if (rfile->output == NULL)
781 return -EINVAL;
782 return snd_rawmidi_drain_output(rfile->output);
783 case SNDRV_RAWMIDI_STREAM_INPUT:
784 if (rfile->input == NULL)
785 return -EINVAL;
786 return snd_rawmidi_drain_input(rfile->input);
787 default:
788 return -EINVAL;
789 }
790 }
791#ifdef CONFIG_SND_DEBUG
792 default:
793 snd_printk(KERN_WARNING "rawmidi: unknown command = 0x%x\n", cmd);
794#endif
795 }
796 return -ENOTTY;
797}
798
799static int snd_rawmidi_control_ioctl(snd_card_t * card,
800 snd_ctl_file_t * control,
801 unsigned int cmd,
802 unsigned long arg)
803{
804 void __user *argp = (void __user *)arg;
805 unsigned int tmp;
806
807 tmp = card->number * SNDRV_RAWMIDI_DEVICES;
808 switch (cmd) {
809 case SNDRV_CTL_IOCTL_RAWMIDI_NEXT_DEVICE:
810 {
811 int device;
812
813 if (get_user(device, (int __user *)argp))
814 return -EFAULT;
815 device = device < 0 ? 0 : device + 1;
816 while (device < SNDRV_RAWMIDI_DEVICES) {
817 if (snd_rawmidi_devices[tmp + device])
818 break;
819 device++;
820 }
821 if (device == SNDRV_RAWMIDI_DEVICES)
822 device = -1;
823 if (put_user(device, (int __user *)argp))
824 return -EFAULT;
825 return 0;
826 }
827 case SNDRV_CTL_IOCTL_RAWMIDI_PREFER_SUBDEVICE:
828 {
829 int val;
830
831 if (get_user(val, (int __user *)argp))
832 return -EFAULT;
833 control->prefer_rawmidi_subdevice = val;
834 return 0;
835 }
836 case SNDRV_CTL_IOCTL_RAWMIDI_INFO:
837 return snd_rawmidi_info_select_user(card, argp);
838 }
839 return -ENOIOCTLCMD;
840}
841
842/**
843 * snd_rawmidi_receive - receive the input data from the device
844 * @substream: the rawmidi substream
845 * @buffer: the buffer pointer
846 * @count: the data size to read
847 *
848 * Reads the data from the internal buffer.
849 *
850 * Returns the size of read data, or a negative error code on failure.
851 */
852int snd_rawmidi_receive(snd_rawmidi_substream_t * substream, const unsigned char *buffer, int count)
853{
854 unsigned long flags;
855 int result = 0, count1;
856 snd_rawmidi_runtime_t *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
911static long snd_rawmidi_kernel_read1(snd_rawmidi_substream_t *substream,
912 unsigned char *buf, long count, int kernel)
913{
914 unsigned long flags;
915 long result = 0, count1;
916 snd_rawmidi_runtime_t *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
945long snd_rawmidi_kernel_read(snd_rawmidi_substream_t *substream, unsigned char *buf, long count)
946{
947 snd_rawmidi_input_trigger(substream, 1);
948 return snd_rawmidi_kernel_read1(substream, buf, count, 1);
949}
950
951static ssize_t snd_rawmidi_read(struct file *file, char __user *buf, size_t count, loff_t *offset)
952{
953 long result;
954 int count1;
955 snd_rawmidi_file_t *rfile;
956 snd_rawmidi_substream_t *substream;
957 snd_rawmidi_runtime_t *runtime;
958
959 rfile = file->private_data;
960 substream = rfile->input;
961 if (substream == NULL)
962 return -EIO;
963 runtime = substream->runtime;
964 snd_rawmidi_input_trigger(substream, 1);
965 result = 0;
966 while (count > 0) {
967 spin_lock_irq(&runtime->lock);
968 while (!snd_rawmidi_ready(substream)) {
969 wait_queue_t wait;
970 if ((file->f_flags & O_NONBLOCK) != 0 || result > 0) {
971 spin_unlock_irq(&runtime->lock);
972 return result > 0 ? result : -EAGAIN;
973 }
974 init_waitqueue_entry(&wait, current);
975 add_wait_queue(&runtime->sleep, &wait);
976 set_current_state(TASK_INTERRUPTIBLE);
977 spin_unlock_irq(&runtime->lock);
978 schedule();
979 remove_wait_queue(&runtime->sleep, &wait);
980 if (signal_pending(current))
981 return result > 0 ? result : -ERESTARTSYS;
982 if (!runtime->avail)
983 return result > 0 ? result : -EIO;
984 spin_lock_irq(&runtime->lock);
985 }
986 spin_unlock_irq(&runtime->lock);
987 count1 = snd_rawmidi_kernel_read1(substream, (unsigned char *)buf, count, 0);
988 if (count1 < 0)
989 return result > 0 ? result : count1;
990 result += count1;
991 buf += count1;
992 count -= count1;
993 }
994 return result;
995}
996
997/**
998 * snd_rawmidi_transmit_empty - check whether the output buffer is empty
999 * @substream: the rawmidi substream
1000 *
1001 * Returns 1 if the internal output buffer is empty, 0 if not.
1002 */
1003int snd_rawmidi_transmit_empty(snd_rawmidi_substream_t * substream)
1004{
1005 snd_rawmidi_runtime_t *runtime = substream->runtime;
1006 int result;
1007 unsigned long flags;
1008
1009 if (runtime->buffer == NULL) {
1010 snd_printd("snd_rawmidi_transmit_empty: output is not active!!!\n");
1011 return 1;
1012 }
1013 spin_lock_irqsave(&runtime->lock, flags);
1014 result = runtime->avail >= runtime->buffer_size;
1015 spin_unlock_irqrestore(&runtime->lock, flags);
1016 return result;
1017}
1018
1019/**
1020 * snd_rawmidi_transmit_peek - copy data from the internal buffer
1021 * @substream: the rawmidi substream
1022 * @buffer: the buffer pointer
1023 * @count: data size to transfer
1024 *
1025 * Copies data from the internal output buffer to the given buffer.
1026 *
1027 * Call this in the interrupt handler when the midi output is ready,
1028 * and call snd_rawmidi_transmit_ack() after the transmission is
1029 * finished.
1030 *
1031 * Returns the size of copied data, or a negative error code on failure.
1032 */
1033int snd_rawmidi_transmit_peek(snd_rawmidi_substream_t * substream, unsigned char *buffer, int count)
1034{
1035 unsigned long flags;
1036 int result, count1;
1037 snd_rawmidi_runtime_t *runtime = substream->runtime;
1038
1039 if (runtime->buffer == NULL) {
1040 snd_printd("snd_rawmidi_transmit_peek: output is not active!!!\n");
1041 return -EINVAL;
1042 }
1043 result = 0;
1044 spin_lock_irqsave(&runtime->lock, flags);
1045 if (runtime->avail >= runtime->buffer_size) {
1046 /* warning: lowlevel layer MUST trigger down the hardware */
1047 goto __skip;
1048 }
1049 if (count == 1) { /* special case, faster code */
1050 *buffer = runtime->buffer[runtime->hw_ptr];
1051 result++;
1052 } else {
1053 count1 = runtime->buffer_size - runtime->hw_ptr;
1054 if (count1 > count)
1055 count1 = count;
1056 if (count1 > (int)(runtime->buffer_size - runtime->avail))
1057 count1 = runtime->buffer_size - runtime->avail;
1058 memcpy(buffer, runtime->buffer + runtime->hw_ptr, count1);
1059 count -= count1;
1060 result += count1;
1061 if (count > 0) {
1062 if (count > (int)(runtime->buffer_size - runtime->avail - count1))
1063 count = runtime->buffer_size - runtime->avail - count1;
1064 memcpy(buffer + count1, runtime->buffer, count);
1065 result += count;
1066 }
1067 }
1068 __skip:
1069 spin_unlock_irqrestore(&runtime->lock, flags);
1070 return result;
1071}
1072
1073/**
1074 * snd_rawmidi_transmit_ack - acknowledge the transmission
1075 * @substream: the rawmidi substream
1076 * @count: the tranferred count
1077 *
1078 * Advances the hardware pointer for the internal output buffer with
1079 * the given size and updates the condition.
1080 * Call after the transmission is finished.
1081 *
1082 * Returns the advanced size if successful, or a negative error code on failure.
1083 */
1084int snd_rawmidi_transmit_ack(snd_rawmidi_substream_t * substream, int count)
1085{
1086 unsigned long flags;
1087 snd_rawmidi_runtime_t *runtime = substream->runtime;
1088
1089 if (runtime->buffer == NULL) {
1090 snd_printd("snd_rawmidi_transmit_ack: output is not active!!!\n");
1091 return -EINVAL;
1092 }
1093 spin_lock_irqsave(&runtime->lock, flags);
1094 snd_assert(runtime->avail + count <= runtime->buffer_size, );
1095 runtime->hw_ptr += count;
1096 runtime->hw_ptr %= runtime->buffer_size;
1097 runtime->avail += count;
1098 substream->bytes += count;
1099 if (count > 0) {
1100 if (runtime->drain || snd_rawmidi_ready(substream))
1101 wake_up(&runtime->sleep);
1102 }
1103 spin_unlock_irqrestore(&runtime->lock, flags);
1104 return count;
1105}
1106
1107/**
1108 * snd_rawmidi_transmit - copy from the buffer to the device
1109 * @substream: the rawmidi substream
1110 * @buf: the buffer pointer
1111 * @count: the data size to transfer
1112 *
1113 * Copies data from the buffer to the device and advances the pointer.
1114 *
1115 * Returns the copied size if successful, or a negative error code on failure.
1116 */
1117int snd_rawmidi_transmit(snd_rawmidi_substream_t * substream, unsigned char *buffer, int count)
1118{
1119 count = snd_rawmidi_transmit_peek(substream, buffer, count);
1120 if (count < 0)
1121 return count;
1122 return snd_rawmidi_transmit_ack(substream, count);
1123}
1124
1125static long snd_rawmidi_kernel_write1(snd_rawmidi_substream_t * substream, const unsigned char *buf, long count, int kernel)
1126{
1127 unsigned long flags;
1128 long count1, result;
1129 snd_rawmidi_runtime_t *runtime = substream->runtime;
1130
1131 snd_assert(buf != NULL, return -EINVAL);
1132 snd_assert(runtime->buffer != NULL, return -EINVAL);
1133
1134 result = 0;
1135 spin_lock_irqsave(&runtime->lock, flags);
1136 if (substream->append) {
1137 if ((long)runtime->avail < count) {
1138 spin_unlock_irqrestore(&runtime->lock, flags);
1139 return -EAGAIN;
1140 }
1141 }
1142 while (count > 0 && runtime->avail > 0) {
1143 count1 = runtime->buffer_size - runtime->appl_ptr;
1144 if (count1 > count)
1145 count1 = count;
1146 if (count1 > (long)runtime->avail)
1147 count1 = runtime->avail;
1148 if (kernel) {
1149 memcpy(runtime->buffer + runtime->appl_ptr, buf, count1);
1150 } else {
1151 spin_unlock_irqrestore(&runtime->lock, flags);
1152 if (copy_from_user(runtime->buffer + runtime->appl_ptr,
1153 (char __user *)buf, count1)) {
1154 spin_lock_irqsave(&runtime->lock, flags);
1155 result = result > 0 ? result : -EFAULT;
1156 goto __end;
1157 }
1158 spin_lock_irqsave(&runtime->lock, flags);
1159 }
1160 runtime->appl_ptr += count1;
1161 runtime->appl_ptr %= runtime->buffer_size;
1162 runtime->avail -= count1;
1163 result += count1;
1164 buf += count1;
1165 count -= count1;
1166 }
1167 __end:
1168 count1 = runtime->avail < runtime->buffer_size;
1169 spin_unlock_irqrestore(&runtime->lock, flags);
1170 if (count1)
1171 snd_rawmidi_output_trigger(substream, 1);
1172 return result;
1173}
1174
1175long snd_rawmidi_kernel_write(snd_rawmidi_substream_t * substream, const unsigned char *buf, long count)
1176{
1177 return snd_rawmidi_kernel_write1(substream, buf, count, 1);
1178}
1179
1180static ssize_t snd_rawmidi_write(struct file *file, const char __user *buf, size_t count, loff_t *offset)
1181{
1182 long result, timeout;
1183 int count1;
1184 snd_rawmidi_file_t *rfile;
1185 snd_rawmidi_runtime_t *runtime;
1186 snd_rawmidi_substream_t *substream;
1187
1188 rfile = file->private_data;
1189 substream = rfile->output;
1190 runtime = substream->runtime;
1191 /* we cannot put an atomic message to our buffer */
1192 if (substream->append && count > runtime->buffer_size)
1193 return -EIO;
1194 result = 0;
1195 while (count > 0) {
1196 spin_lock_irq(&runtime->lock);
1197 while (!snd_rawmidi_ready_append(substream, count)) {
1198 wait_queue_t wait;
1199 if (file->f_flags & O_NONBLOCK) {
1200 spin_unlock_irq(&runtime->lock);
1201 return result > 0 ? result : -EAGAIN;
1202 }
1203 init_waitqueue_entry(&wait, current);
1204 add_wait_queue(&runtime->sleep, &wait);
1205 set_current_state(TASK_INTERRUPTIBLE);
1206 spin_unlock_irq(&runtime->lock);
1207 timeout = schedule_timeout(30 * HZ);
1208 remove_wait_queue(&runtime->sleep, &wait);
1209 if (signal_pending(current))
1210 return result > 0 ? result : -ERESTARTSYS;
1211 if (!runtime->avail && !timeout)
1212 return result > 0 ? result : -EIO;
1213 spin_lock_irq(&runtime->lock);
1214 }
1215 spin_unlock_irq(&runtime->lock);
1216 count1 = snd_rawmidi_kernel_write1(substream, (unsigned char *)buf, count, 0);
1217 if (count1 < 0)
1218 return result > 0 ? result : count1;
1219 result += count1;
1220 buf += count1;
1221 if ((size_t)count1 < count && (file->f_flags & O_NONBLOCK))
1222 break;
1223 count -= count1;
1224 }
1225 if (file->f_flags & O_SYNC) {
1226 spin_lock_irq(&runtime->lock);
1227 while (runtime->avail != runtime->buffer_size) {
1228 wait_queue_t wait;
1229 unsigned int last_avail = runtime->avail;
1230 init_waitqueue_entry(&wait, current);
1231 add_wait_queue(&runtime->sleep, &wait);
1232 set_current_state(TASK_INTERRUPTIBLE);
1233 spin_unlock_irq(&runtime->lock);
1234 timeout = schedule_timeout(30 * HZ);
1235 remove_wait_queue(&runtime->sleep, &wait);
1236 if (signal_pending(current))
1237 return result > 0 ? result : -ERESTARTSYS;
1238 if (runtime->avail == last_avail && !timeout)
1239 return result > 0 ? result : -EIO;
1240 spin_lock_irq(&runtime->lock);
1241 }
1242 spin_unlock_irq(&runtime->lock);
1243 }
1244 return result;
1245}
1246
1247static unsigned int snd_rawmidi_poll(struct file *file, poll_table * wait)
1248{
1249 snd_rawmidi_file_t *rfile;
1250 snd_rawmidi_runtime_t *runtime;
1251 unsigned int mask;
1252
1253 rfile = file->private_data;
1254 if (rfile->input != NULL) {
1255 runtime = rfile->input->runtime;
1256 snd_rawmidi_input_trigger(rfile->input, 1);
1257 poll_wait(file, &runtime->sleep, wait);
1258 }
1259 if (rfile->output != NULL) {
1260 runtime = rfile->output->runtime;
1261 poll_wait(file, &runtime->sleep, wait);
1262 }
1263 mask = 0;
1264 if (rfile->input != NULL) {
1265 if (snd_rawmidi_ready(rfile->input))
1266 mask |= POLLIN | POLLRDNORM;
1267 }
1268 if (rfile->output != NULL) {
1269 if (snd_rawmidi_ready(rfile->output))
1270 mask |= POLLOUT | POLLWRNORM;
1271 }
1272 return mask;
1273}
1274
1275/*
1276 */
1277#ifdef CONFIG_COMPAT
1278#include "rawmidi_compat.c"
1279#else
1280#define snd_rawmidi_ioctl_compat NULL
1281#endif
1282
1283/*
1284
1285 */
1286
1287static void snd_rawmidi_proc_info_read(snd_info_entry_t *entry,
1288 snd_info_buffer_t * buffer)
1289{
1290 snd_rawmidi_t *rmidi;
1291 snd_rawmidi_substream_t *substream;
1292 snd_rawmidi_runtime_t *runtime;
1293 struct list_head *list;
1294
1295 rmidi = entry->private_data;
1296 snd_iprintf(buffer, "%s\n\n", rmidi->name);
1297 down(&rmidi->open_mutex);
1298 if (rmidi->info_flags & SNDRV_RAWMIDI_INFO_OUTPUT) {
1299 list_for_each(list, &rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substreams) {
1300 substream = list_entry(list, snd_rawmidi_substream_t, list);
1301 snd_iprintf(buffer,
1302 "Output %d\n"
1303 " Tx bytes : %lu\n",
1304 substream->number,
1305 (unsigned long) substream->bytes);
1306 if (substream->opened) {
1307 runtime = substream->runtime;
1308 snd_iprintf(buffer,
1309 " Mode : %s\n"
1310 " Buffer size : %lu\n"
1311 " Avail : %lu\n",
1312 runtime->oss ? "OSS compatible" : "native",
1313 (unsigned long) runtime->buffer_size,
1314 (unsigned long) runtime->avail);
1315 }
1316 }
1317 }
1318 if (rmidi->info_flags & SNDRV_RAWMIDI_INFO_INPUT) {
1319 list_for_each(list, &rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substreams) {
1320 substream = list_entry(list, snd_rawmidi_substream_t, list);
1321 snd_iprintf(buffer,
1322 "Input %d\n"
1323 " Rx bytes : %lu\n",
1324 substream->number,
1325 (unsigned long) substream->bytes);
1326 if (substream->opened) {
1327 runtime = substream->runtime;
1328 snd_iprintf(buffer,
1329 " Buffer size : %lu\n"
1330 " Avail : %lu\n"
1331 " Overruns : %lu\n",
1332 (unsigned long) runtime->buffer_size,
1333 (unsigned long) runtime->avail,
1334 (unsigned long) runtime->xruns);
1335 }
1336 }
1337 }
1338 up(&rmidi->open_mutex);
1339}
1340
1341/*
1342 * Register functions
1343 */
1344
1345static struct file_operations snd_rawmidi_f_ops =
1346{
1347 .owner = THIS_MODULE,
1348 .read = snd_rawmidi_read,
1349 .write = snd_rawmidi_write,
1350 .open = snd_rawmidi_open,
1351 .release = snd_rawmidi_release,
1352 .poll = snd_rawmidi_poll,
1353 .unlocked_ioctl = snd_rawmidi_ioctl,
1354 .compat_ioctl = snd_rawmidi_ioctl_compat,
1355};
1356
1357static snd_minor_t snd_rawmidi_reg =
1358{
1359 .comment = "raw midi",
1360 .f_ops = &snd_rawmidi_f_ops,
1361};
1362
1363static int snd_rawmidi_alloc_substreams(snd_rawmidi_t *rmidi,
1364 snd_rawmidi_str_t *stream,
1365 int direction,
1366 int count)
1367{
1368 snd_rawmidi_substream_t *substream;
1369 int idx;
1370
1371 INIT_LIST_HEAD(&stream->substreams);
1372 for (idx = 0; idx < count; idx++) {
1373 substream = kcalloc(1, sizeof(*substream), GFP_KERNEL);
1374 if (substream == NULL)
1375 return -ENOMEM;
1376 substream->stream = direction;
1377 substream->number = idx;
1378 substream->rmidi = rmidi;
1379 substream->pstr = stream;
1380 list_add_tail(&substream->list, &stream->substreams);
1381 stream->substream_count++;
1382 }
1383 return 0;
1384}
1385
1386/**
1387 * snd_rawmidi_new - create a rawmidi instance
1388 * @card: the card instance
1389 * @id: the id string
1390 * @device: the device index
1391 * @output_count: the number of output streams
1392 * @input_count: the number of input streams
1393 * @rrawmidi: the pointer to store the new rawmidi instance
1394 *
1395 * Creates a new rawmidi instance.
1396 * Use snd_rawmidi_set_ops() to set the operators to the new instance.
1397 *
1398 * Returns zero if successful, or a negative error code on failure.
1399 */
1400int snd_rawmidi_new(snd_card_t * card, char *id, int device,
1401 int output_count, int input_count,
1402 snd_rawmidi_t ** rrawmidi)
1403{
1404 snd_rawmidi_t *rmidi;
1405 int err;
1406 static snd_device_ops_t ops = {
1407 .dev_free = snd_rawmidi_dev_free,
1408 .dev_register = snd_rawmidi_dev_register,
1409 .dev_disconnect = snd_rawmidi_dev_disconnect,
1410 .dev_unregister = snd_rawmidi_dev_unregister
1411 };
1412
1413 snd_assert(rrawmidi != NULL, return -EINVAL);
1414 *rrawmidi = NULL;
1415 snd_assert(card != NULL, return -ENXIO);
1416 rmidi = kcalloc(1, sizeof(*rmidi), GFP_KERNEL);
1417 if (rmidi == NULL)
1418 return -ENOMEM;
1419 rmidi->card = card;
1420 rmidi->device = device;
1421 init_MUTEX(&rmidi->open_mutex);
1422 init_waitqueue_head(&rmidi->open_wait);
1423 if (id != NULL)
1424 strlcpy(rmidi->id, id, sizeof(rmidi->id));
1425 if ((err = snd_rawmidi_alloc_substreams(rmidi, &rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT], SNDRV_RAWMIDI_STREAM_INPUT, input_count)) < 0) {
1426 snd_rawmidi_free(rmidi);
1427 return err;
1428 }
1429 if ((err = snd_rawmidi_alloc_substreams(rmidi, &rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT], SNDRV_RAWMIDI_STREAM_OUTPUT, output_count)) < 0) {
1430 snd_rawmidi_free(rmidi);
1431 return err;
1432 }
1433 if ((err = snd_device_new(card, SNDRV_DEV_RAWMIDI, rmidi, &ops)) < 0) {
1434 snd_rawmidi_free(rmidi);
1435 return err;
1436 }
1437 *rrawmidi = rmidi;
1438 return 0;
1439}
1440
1441static void snd_rawmidi_free_substreams(snd_rawmidi_str_t *stream)
1442{
1443 snd_rawmidi_substream_t *substream;
1444
1445 while (!list_empty(&stream->substreams)) {
1446 substream = list_entry(stream->substreams.next, snd_rawmidi_substream_t, list);
1447 list_del(&substream->list);
1448 kfree(substream);
1449 }
1450}
1451
1452static int snd_rawmidi_free(snd_rawmidi_t *rmidi)
1453{
1454 snd_assert(rmidi != NULL, return -ENXIO);
1455 snd_rawmidi_free_substreams(&rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT]);
1456 snd_rawmidi_free_substreams(&rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT]);
1457 if (rmidi->private_free)
1458 rmidi->private_free(rmidi);
1459 kfree(rmidi);
1460 return 0;
1461}
1462
1463static int snd_rawmidi_dev_free(snd_device_t *device)
1464{
1465 snd_rawmidi_t *rmidi = device->device_data;
1466 return snd_rawmidi_free(rmidi);
1467}
1468
1469#if defined(CONFIG_SND_SEQUENCER) || (defined(MODULE) && defined(CONFIG_SND_SEQUENCER_MODULE))
1470static void snd_rawmidi_dev_seq_free(snd_seq_device_t *device)
1471{
1472 snd_rawmidi_t *rmidi = device->private_data;
1473 rmidi->seq_dev = NULL;
1474}
1475#endif
1476
1477static int snd_rawmidi_dev_register(snd_device_t *device)
1478{
1479 int idx, err;
1480 snd_info_entry_t *entry;
1481 char name[16];
1482 snd_rawmidi_t *rmidi = device->device_data;
1483
1484 if (rmidi->device >= SNDRV_RAWMIDI_DEVICES)
1485 return -ENOMEM;
1486 down(&register_mutex);
1487 idx = (rmidi->card->number * SNDRV_RAWMIDI_DEVICES) + rmidi->device;
1488 if (snd_rawmidi_devices[idx] != NULL) {
1489 up(&register_mutex);
1490 return -EBUSY;
1491 }
1492 snd_rawmidi_devices[idx] = rmidi;
1493 sprintf(name, "midiC%iD%i", rmidi->card->number, rmidi->device);
1494 if ((err = snd_register_device(SNDRV_DEVICE_TYPE_RAWMIDI,
1495 rmidi->card, rmidi->device,
1496 &snd_rawmidi_reg, name)) < 0) {
1497 snd_printk(KERN_ERR "unable to register rawmidi device %i:%i\n", rmidi->card->number, rmidi->device);
1498 snd_rawmidi_devices[idx] = NULL;
1499 up(&register_mutex);
1500 return err;
1501 }
1502 if (rmidi->ops && rmidi->ops->dev_register &&
1503 (err = rmidi->ops->dev_register(rmidi)) < 0) {
1504 snd_unregister_device(SNDRV_DEVICE_TYPE_RAWMIDI, rmidi->card, rmidi->device);
1505 snd_rawmidi_devices[idx] = NULL;
1506 up(&register_mutex);
1507 return err;
1508 }
1509#ifdef CONFIG_SND_OSSEMUL
1510 rmidi->ossreg = 0;
1511 if ((int)rmidi->device == midi_map[rmidi->card->number]) {
1512 if (snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_MIDI,
1513 rmidi->card, 0, &snd_rawmidi_reg, name) < 0) {
1514 snd_printk(KERN_ERR "unable to register OSS rawmidi device %i:%i\n", rmidi->card->number, 0);
1515 } else {
1516 rmidi->ossreg++;
1517#ifdef SNDRV_OSS_INFO_DEV_MIDI
1518 snd_oss_info_register(SNDRV_OSS_INFO_DEV_MIDI, rmidi->card->number, rmidi->name);
1519#endif
1520 }
1521 }
1522 if ((int)rmidi->device == amidi_map[rmidi->card->number]) {
1523 if (snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_MIDI,
1524 rmidi->card, 1, &snd_rawmidi_reg, name) < 0) {
1525 snd_printk(KERN_ERR "unable to register OSS rawmidi device %i:%i\n", rmidi->card->number, 1);
1526 } else {
1527 rmidi->ossreg++;
1528 }
1529 }
1530#endif /* CONFIG_SND_OSSEMUL */
1531 up(&register_mutex);
1532 sprintf(name, "midi%d", rmidi->device);
1533 entry = snd_info_create_card_entry(rmidi->card, name, rmidi->card->proc_root);
1534 if (entry) {
1535 entry->private_data = rmidi;
1536 entry->c.text.read_size = 1024;
1537 entry->c.text.read = snd_rawmidi_proc_info_read;
1538 if (snd_info_register(entry) < 0) {
1539 snd_info_free_entry(entry);
1540 entry = NULL;
1541 }
1542 }
1543 rmidi->proc_entry = entry;
1544#if defined(CONFIG_SND_SEQUENCER) || (defined(MODULE) && defined(CONFIG_SND_SEQUENCER_MODULE))
1545 if (!rmidi->ops || !rmidi->ops->dev_register) { /* own registration mechanism */
1546 if (snd_seq_device_new(rmidi->card, rmidi->device, SNDRV_SEQ_DEV_ID_MIDISYNTH, 0, &rmidi->seq_dev) >= 0) {
1547 rmidi->seq_dev->private_data = rmidi;
1548 rmidi->seq_dev->private_free = snd_rawmidi_dev_seq_free;
1549 sprintf(rmidi->seq_dev->name, "MIDI %d-%d", rmidi->card->number, rmidi->device);
1550 snd_device_register(rmidi->card, rmidi->seq_dev);
1551 }
1552 }
1553#endif
1554 return 0;
1555}
1556
1557static int snd_rawmidi_dev_disconnect(snd_device_t *device)
1558{
1559 snd_rawmidi_t *rmidi = device->device_data;
1560 int idx;
1561
1562 down(&register_mutex);
1563 idx = (rmidi->card->number * SNDRV_RAWMIDI_DEVICES) + rmidi->device;
1564 snd_rawmidi_devices[idx] = NULL;
1565 up(&register_mutex);
1566 return 0;
1567}
1568
1569static int snd_rawmidi_dev_unregister(snd_device_t *device)
1570{
1571 int idx;
1572 snd_rawmidi_t *rmidi = device->device_data;
1573
1574 snd_assert(rmidi != NULL, return -ENXIO);
1575 down(&register_mutex);
1576 idx = (rmidi->card->number * SNDRV_RAWMIDI_DEVICES) + rmidi->device;
1577 snd_rawmidi_devices[idx] = NULL;
1578 if (rmidi->proc_entry) {
1579 snd_info_unregister(rmidi->proc_entry);
1580 rmidi->proc_entry = NULL;
1581 }
1582#ifdef CONFIG_SND_OSSEMUL
1583 if (rmidi->ossreg) {
1584 if ((int)rmidi->device == midi_map[rmidi->card->number]) {
1585 snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_MIDI, rmidi->card, 0);
1586#ifdef SNDRV_OSS_INFO_DEV_MIDI
1587 snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_MIDI, rmidi->card->number);
1588#endif
1589 }
1590 if ((int)rmidi->device == amidi_map[rmidi->card->number])
1591 snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_MIDI, rmidi->card, 1);
1592 rmidi->ossreg = 0;
1593 }
1594#endif /* CONFIG_SND_OSSEMUL */
1595 if (rmidi->ops && rmidi->ops->dev_unregister)
1596 rmidi->ops->dev_unregister(rmidi);
1597 snd_unregister_device(SNDRV_DEVICE_TYPE_RAWMIDI, rmidi->card, rmidi->device);
1598 up(&register_mutex);
1599#if defined(CONFIG_SND_SEQUENCER) || (defined(MODULE) && defined(CONFIG_SND_SEQUENCER_MODULE))
1600 if (rmidi->seq_dev) {
1601 snd_device_free(rmidi->card, rmidi->seq_dev);
1602 rmidi->seq_dev = NULL;
1603 }
1604#endif
1605 return snd_rawmidi_free(rmidi);
1606}
1607
1608/**
1609 * snd_rawmidi_set_ops - set the rawmidi operators
1610 * @rmidi: the rawmidi instance
1611 * @stream: the stream direction, SNDRV_RAWMIDI_STREAM_XXX
1612 * @ops: the operator table
1613 *
1614 * Sets the rawmidi operators for the given stream direction.
1615 */
1616void snd_rawmidi_set_ops(snd_rawmidi_t *rmidi, int stream, snd_rawmidi_ops_t *ops)
1617{
1618 struct list_head *list;
1619 snd_rawmidi_substream_t *substream;
1620
1621 list_for_each(list, &rmidi->streams[stream].substreams) {
1622 substream = list_entry(list, snd_rawmidi_substream_t, list);
1623 substream->ops = ops;
1624 }
1625}
1626
1627/*
1628 * ENTRY functions
1629 */
1630
1631static int __init alsa_rawmidi_init(void)
1632{
1633
1634 snd_ctl_register_ioctl(snd_rawmidi_control_ioctl);
1635 snd_ctl_register_ioctl_compat(snd_rawmidi_control_ioctl);
1636#ifdef CONFIG_SND_OSSEMUL
1637 { int i;
1638 /* check device map table */
1639 for (i = 0; i < SNDRV_CARDS; i++) {
1640 if (midi_map[i] < 0 || midi_map[i] >= SNDRV_RAWMIDI_DEVICES) {
1641 snd_printk(KERN_ERR "invalid midi_map[%d] = %d\n", i, midi_map[i]);
1642 midi_map[i] = 0;
1643 }
1644 if (amidi_map[i] < 0 || amidi_map[i] >= SNDRV_RAWMIDI_DEVICES) {
1645 snd_printk(KERN_ERR "invalid amidi_map[%d] = %d\n", i, amidi_map[i]);
1646 amidi_map[i] = 1;
1647 }
1648 }
1649 }
1650#endif /* CONFIG_SND_OSSEMUL */
1651 return 0;
1652}
1653
1654static void __exit alsa_rawmidi_exit(void)
1655{
1656 snd_ctl_unregister_ioctl(snd_rawmidi_control_ioctl);
1657 snd_ctl_unregister_ioctl_compat(snd_rawmidi_control_ioctl);
1658}
1659
1660module_init(alsa_rawmidi_init)
1661module_exit(alsa_rawmidi_exit)
1662
1663EXPORT_SYMBOL(snd_rawmidi_output_params);
1664EXPORT_SYMBOL(snd_rawmidi_input_params);
1665EXPORT_SYMBOL(snd_rawmidi_drop_output);
1666EXPORT_SYMBOL(snd_rawmidi_drain_output);
1667EXPORT_SYMBOL(snd_rawmidi_drain_input);
1668EXPORT_SYMBOL(snd_rawmidi_receive);
1669EXPORT_SYMBOL(snd_rawmidi_transmit_empty);
1670EXPORT_SYMBOL(snd_rawmidi_transmit_peek);
1671EXPORT_SYMBOL(snd_rawmidi_transmit_ack);
1672EXPORT_SYMBOL(snd_rawmidi_transmit);
1673EXPORT_SYMBOL(snd_rawmidi_new);
1674EXPORT_SYMBOL(snd_rawmidi_set_ops);
1675EXPORT_SYMBOL(snd_rawmidi_info);
1676EXPORT_SYMBOL(snd_rawmidi_info_select);
1677EXPORT_SYMBOL(snd_rawmidi_kernel_open);
1678EXPORT_SYMBOL(snd_rawmidi_kernel_release);
1679EXPORT_SYMBOL(snd_rawmidi_kernel_read);
1680EXPORT_SYMBOL(snd_rawmidi_kernel_write);
generated by cgit v1.2.2 (git 2.25.0) at 2025-09-03 15:07:33 -0400