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initial commit with v2.6.9
[linux-2.6.9-moxart.git] / sound / core / rawmidi.c
blob1c753cda66f4cd05d19273cd83d4a00f2dfd5f24
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 <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@suse.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] = {[0 ... (SNDRV_CARDS-1)] = 0};
44 static int amidi_map[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS-1)] = 1};
45 static int boot_devs;
46 module_param_array(midi_map, int, boot_devs, 0444);
47 MODULE_PARM_DESC(midi_map, "Raw MIDI device number assigned to 1st OSS device.");
48 module_param_array(amidi_map, int, boot_devs, 0444);
49 MODULE_PARM_DESC(amidi_map, "Raw MIDI device number assigned to 2nd OSS device.");
50 #endif /* CONFIG_SND_OSSEMUL */
51
52 static int snd_rawmidi_free(snd_rawmidi_t *rawmidi);
53 static int snd_rawmidi_dev_free(snd_device_t *device);
54 static int snd_rawmidi_dev_register(snd_device_t *device);
55 static int snd_rawmidi_dev_disconnect(snd_device_t *device);
56 static int snd_rawmidi_dev_unregister(snd_device_t *device);
57
58 snd_rawmidi_t *snd_rawmidi_devices[SNDRV_CARDS * SNDRV_RAWMIDI_DEVICES];
59
60 static DECLARE_MUTEX(register_mutex);
61
62 static inline unsigned short snd_rawmidi_file_flags(struct file *file)
63 {
64 switch (file->f_mode & (FMODE_READ | FMODE_WRITE)) {
65 case FMODE_WRITE:
66 return SNDRV_RAWMIDI_LFLG_OUTPUT;
67 case FMODE_READ:
68 return SNDRV_RAWMIDI_LFLG_INPUT;
69 default:
70 return SNDRV_RAWMIDI_LFLG_OPEN;
71 }
72 }
73
74 static inline int snd_rawmidi_ready(snd_rawmidi_substream_t * substream)
75 {
76 snd_rawmidi_runtime_t *runtime = substream->runtime;
77 return runtime->avail >= runtime->avail_min;
78 }
79
80 static inline int snd_rawmidi_ready_append(snd_rawmidi_substream_t * substream, size_t count)
81 {
82 snd_rawmidi_runtime_t *runtime = substream->runtime;
83 return runtime->avail >= runtime->avail_min &&
84 (!substream->append || runtime->avail >= count);
85 }
86
87 static int snd_rawmidi_init(snd_rawmidi_substream_t *substream)
88 {
89 snd_rawmidi_runtime_t *runtime = substream->runtime;
90 spin_lock_init(&runtime->lock);
91 init_waitqueue_head(&runtime->sleep);
92 runtime->event = NULL;
93 runtime->buffer_size = PAGE_SIZE;
94 runtime->avail_min = 1;
95 if (substream->stream == SNDRV_RAWMIDI_STREAM_INPUT)
96 runtime->avail = 0;
97 else
98 runtime->avail = runtime->buffer_size;
99 if ((runtime->buffer = kmalloc(runtime->buffer_size, GFP_KERNEL)) == NULL)
100 return -ENOMEM;
101 runtime->appl_ptr = runtime->hw_ptr = 0;
102 return 0;
103 }
104
105 static int snd_rawmidi_done_buffer(snd_rawmidi_runtime_t *runtime)
106 {
107 if (runtime->buffer) {
108 kfree(runtime->buffer);
109 runtime->buffer = NULL;
110 }
111 return 0;
112 }
113
114 int snd_rawmidi_drop_output(snd_rawmidi_substream_t * substream)
115 {
116 snd_rawmidi_runtime_t *runtime = substream->runtime;
117
118 substream->ops->trigger(substream, 0);
119 runtime->trigger = 0;
120 runtime->drain = 0;
121 /* interrupts are not enabled at this moment,
122 so spinlock is not required */
123 runtime->appl_ptr = runtime->hw_ptr = 0;
124 runtime->avail = runtime->buffer_size;
125 return 0;
126 }
127
128 int snd_rawmidi_drain_output(snd_rawmidi_substream_t * substream)
129 {
130 int err;
131 long timeout;
132 snd_rawmidi_runtime_t *runtime = substream->runtime;
133
134 err = 0;
135 runtime->drain = 1;
136 while (runtime->avail < runtime->buffer_size) {
137 timeout = interruptible_sleep_on_timeout(&runtime->sleep, 10 * HZ);
138 if (signal_pending(current)) {
139 err = -ERESTARTSYS;
140 break;
141 }
142 if (runtime->avail < runtime->buffer_size && !timeout) {
143 snd_printk(KERN_WARNING "rawmidi drain error (avail = %li, buffer_size = %li)\n", (long)runtime->avail, (long)runtime->buffer_size);
144 err = -EIO;
145 break;
146 }
147 }
148 runtime->drain = 0;
149 if (err != -ERESTARTSYS) {
150 /* we need wait a while to make sure that Tx FIFOs are empty */
151 if (substream->ops->drain)
152 substream->ops->drain(substream);
153 else {
154 set_current_state(TASK_UNINTERRUPTIBLE);
155 schedule_timeout(HZ / 20);
156 }
157 snd_rawmidi_drop_output(substream);
158 }
159 return err;
160 }
161
162 int snd_rawmidi_drain_input(snd_rawmidi_substream_t * substream)
163 {
164 snd_rawmidi_runtime_t *runtime = substream->runtime;
165
166 substream->ops->trigger(substream, 0);
167 runtime->trigger = 0;
168 runtime->drain = 0;
169 /* interrupts aren't enabled at this moment, so spinlock isn't needed */
170 runtime->appl_ptr = runtime->hw_ptr = 0;
171 runtime->avail = 0;
172 return 0;
173 }
174
175 int snd_rawmidi_kernel_open(int cardnum, int device, int subdevice,
176 int mode, snd_rawmidi_file_t * rfile)
177 {
178 snd_rawmidi_t *rmidi;
179 struct list_head *list1, *list2;
180 snd_rawmidi_substream_t *sinput, *soutput;
181 snd_rawmidi_runtime_t *input = NULL, *output = NULL;
182 int err;
183
184 if (rfile)
185 rfile->input = rfile->output = NULL;
186 rmidi = snd_rawmidi_devices[(cardnum * SNDRV_RAWMIDI_DEVICES) + device];
187 if (rmidi == NULL) {
188 err = -ENODEV;
189 goto __error1;
190 }
191 if (!try_module_get(rmidi->card->module)) {
192 err = -EFAULT;
193 goto __error1;
194 }
195 if (!(mode & SNDRV_RAWMIDI_LFLG_NOOPENLOCK))
196 down(&rmidi->open_mutex);
197 if (mode & SNDRV_RAWMIDI_LFLG_INPUT) {
198 if (!(rmidi->info_flags & SNDRV_RAWMIDI_INFO_INPUT)) {
199 err = -ENXIO;
200 goto __error;
201 }
202 if (subdevice >= 0 && (unsigned int)subdevice >= rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substream_count) {
203 err = -ENODEV;
204 goto __error;
205 }
206 if (rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substream_opened >=
207 rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substream_count) {
208 err = -EAGAIN;
209 goto __error;
210 }
211 }
212 if (mode & SNDRV_RAWMIDI_LFLG_OUTPUT) {
213 if (!(rmidi->info_flags & SNDRV_RAWMIDI_INFO_OUTPUT)) {
214 err = -ENXIO;
215 goto __error;
216 }
217 if (subdevice >= 0 && (unsigned int)subdevice >= rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substream_count) {
218 err = -ENODEV;
219 goto __error;
220 }
221 if (rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substream_opened >=
222 rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substream_count) {
223 err = -EAGAIN;
224 goto __error;
225 }
226 }
227 list1 = rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substreams.next;
228 while (1) {
229 if (list1 == &rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substreams) {
230 sinput = NULL;
231 if (mode & SNDRV_RAWMIDI_LFLG_INPUT) {
232 err = -EAGAIN;
233 goto __error;
234 }
235 break;
236 }
237 sinput = list_entry(list1, snd_rawmidi_substream_t, list);
238 if ((mode & SNDRV_RAWMIDI_LFLG_INPUT) && sinput->opened)
239 goto __nexti;
240 if (subdevice < 0 || (subdevice >= 0 && subdevice == sinput->number))
241 break;
242 __nexti:
243 list1 = list1->next;
244 }
245 list2 = rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substreams.next;
246 while (1) {
247 if (list2 == &rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substreams) {
248 soutput = NULL;
249 if (mode & SNDRV_RAWMIDI_LFLG_OUTPUT) {
250 err = -EAGAIN;
251 goto __error;
252 }
253 break;
254 }
255 soutput = list_entry(list2, snd_rawmidi_substream_t, list);
256 if (mode & SNDRV_RAWMIDI_LFLG_OUTPUT) {
257 if (mode & SNDRV_RAWMIDI_LFLG_APPEND) {
258 if (soutput->opened && !soutput->append)
259 goto __nexto;
260 } else {
261 if (soutput->opened)
262 goto __nexto;
263 }
264 }
265 if (subdevice < 0 || (subdevice >= 0 && subdevice == soutput->number))
266 break;
267 __nexto:
268 list2 = list2->next;
269 }
270 if (mode & SNDRV_RAWMIDI_LFLG_INPUT) {
271 input = kcalloc(1, sizeof(*input), GFP_KERNEL);
272 if (input == NULL) {
273 err = -ENOMEM;
274 goto __error;
275 }
276 sinput->runtime = input;
277 if (snd_rawmidi_init(sinput) < 0) {
278 err = -ENOMEM;
279 goto __error;
280 }
281 if ((err = sinput->ops->open(sinput)) < 0) {
282 sinput->runtime = NULL;
283 goto __error;
284 }
285 sinput->opened = 1;
286 rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substream_opened++;
287 } else {
288 sinput = NULL;
289 }
290 if (mode & SNDRV_RAWMIDI_LFLG_OUTPUT) {
291 if (soutput->opened)
292 goto __skip_output;
293 output = kcalloc(1, sizeof(*output), GFP_KERNEL);
294 if (output == NULL) {
295 err = -ENOMEM;
296 goto __error;
297 }
298 soutput->runtime = output;
299 if (snd_rawmidi_init(soutput) < 0) {
300 if (mode & SNDRV_RAWMIDI_LFLG_INPUT) {
301 sinput->ops->close(sinput);
302 sinput->runtime = NULL;
303 }
304 err = -ENOMEM;
305 goto __error;
306 }
307 if ((err = soutput->ops->open(soutput)) < 0) {
308 if (mode & SNDRV_RAWMIDI_LFLG_INPUT) {
309 sinput->ops->close(sinput);
310 sinput->runtime = NULL;
311 }
312 soutput->runtime = NULL;
313 goto __error;
314 }
315 __skip_output:
316 soutput->opened = 1;
317 if (mode & SNDRV_RAWMIDI_LFLG_APPEND)
318 soutput->append = 1;
319 if (soutput->use_count++ == 0)
320 soutput->active_sensing = 1;
321 rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substream_opened++;
322 } else {
323 soutput = NULL;
324 }
325 if (!(mode & SNDRV_RAWMIDI_LFLG_NOOPENLOCK))
326 up(&rmidi->open_mutex);
327 if (rfile) {
328 rfile->rmidi = rmidi;
329 rfile->input = sinput;
330 rfile->output = soutput;
331 }
332 return 0;
333
334 __error:
335 if (input != NULL) {
336 snd_rawmidi_done_buffer(input);
337 kfree(input);
338 }
339 if (output != NULL) {
340 snd_rawmidi_done_buffer(output);
341 kfree(output);
342 }
343 module_put(rmidi->card->module);
344 if (!(mode & SNDRV_RAWMIDI_LFLG_NOOPENLOCK))
345 up(&rmidi->open_mutex);
346 __error1:
347 return err;
348 }
349
350 static int snd_rawmidi_open(struct inode *inode, struct file *file)
351 {
352 int maj = imajor(inode);
353 int cardnum;
354 snd_card_t *card;
355 int device, subdevice;
356 unsigned short fflags;
357 int err;
358 snd_rawmidi_t *rmidi;
359 snd_rawmidi_file_t *rawmidi_file;
360 wait_queue_t wait;
361 struct list_head *list;
362 snd_ctl_file_t *kctl;
363
364 switch (maj) {
365 case CONFIG_SND_MAJOR:
366 cardnum = SNDRV_MINOR_CARD(iminor(inode));
367 cardnum %= SNDRV_CARDS;
368 device = SNDRV_MINOR_DEVICE(iminor(inode)) - SNDRV_MINOR_RAWMIDI;
369 device %= SNDRV_MINOR_RAWMIDIS;
370 break;
371 #ifdef CONFIG_SND_OSSEMUL
372 case SOUND_MAJOR:
373 cardnum = SNDRV_MINOR_OSS_CARD(iminor(inode));
374 cardnum %= SNDRV_CARDS;
375 device = SNDRV_MINOR_OSS_DEVICE(iminor(inode)) == SNDRV_MINOR_OSS_MIDI ?
376 midi_map[cardnum] : amidi_map[cardnum];
377 break;
378 #endif
379 default:
380 return -ENXIO;
381 }
382
383 rmidi = snd_rawmidi_devices[(cardnum * SNDRV_RAWMIDI_DEVICES) + device];
384 if (rmidi == NULL)
385 return -ENODEV;
386 #ifdef CONFIG_SND_OSSEMUL
387 if (maj == SOUND_MAJOR && !rmidi->ossreg)
388 return -ENXIO;
389 #endif
390 if ((file->f_flags & O_APPEND) && !(file->f_flags & O_NONBLOCK))
391 return -EINVAL; /* invalid combination */
392 card = rmidi->card;
393 err = snd_card_file_add(card, file);
394 if (err < 0)
395 return -ENODEV;
396 fflags = snd_rawmidi_file_flags(file);
397 if ((file->f_flags & O_APPEND) || maj != CONFIG_SND_MAJOR) /* OSS emul? */
398 fflags |= SNDRV_RAWMIDI_LFLG_APPEND;
399 fflags |= SNDRV_RAWMIDI_LFLG_NOOPENLOCK;
400 rawmidi_file = kmalloc(sizeof(*rawmidi_file), GFP_KERNEL);
401 if (rawmidi_file == NULL) {
402 snd_card_file_remove(card, file);
403 return -ENOMEM;
404 }
405 init_waitqueue_entry(&wait, current);
406 add_wait_queue(&rmidi->open_wait, &wait);
407 down(&rmidi->open_mutex);
408 while (1) {
409 subdevice = -1;
410 down_read(&card->controls_rwsem);
411 list_for_each(list, &card->ctl_files) {
412 kctl = snd_ctl_file(list);
413 if (kctl->pid == current->pid) {
414 subdevice = kctl->prefer_rawmidi_subdevice;
415 break;
416 }
417 }
418 up_read(&card->controls_rwsem);
419 err = snd_rawmidi_kernel_open(cardnum, device, subdevice, fflags, rawmidi_file);
420 if (err >= 0)
421 break;
422 if (err == -EAGAIN) {
423 if (file->f_flags & O_NONBLOCK) {
424 err = -EBUSY;
425 break;
426 }
427 } else
428 break;
429 set_current_state(TASK_INTERRUPTIBLE);
430 up(&rmidi->open_mutex);
431 schedule();
432 down(&rmidi->open_mutex);
433 if (signal_pending(current)) {
434 err = -ERESTARTSYS;
435 break;
436 }
437 }
438 #ifdef CONFIG_SND_OSSEMUL
439 if (rawmidi_file->input && rawmidi_file->input->runtime)
440 rawmidi_file->input->runtime->oss = (maj == SOUND_MAJOR);
441 if (rawmidi_file->output && rawmidi_file->output->runtime)
442 rawmidi_file->output->runtime->oss = (maj == SOUND_MAJOR);
443 #endif
444 remove_wait_queue(&rmidi->open_wait, &wait);
445 if (err >= 0) {
446 file->private_data = rawmidi_file;
447 } else {
448 snd_card_file_remove(card, file);
449 kfree(rawmidi_file);
450 }
451 up(&rmidi->open_mutex);
452 return err;
453 }
454
455 int snd_rawmidi_kernel_release(snd_rawmidi_file_t * rfile)
456 {
457 snd_rawmidi_t *rmidi;
458 snd_rawmidi_substream_t *substream;
459 snd_rawmidi_runtime_t *runtime;
460
461 snd_assert(rfile != NULL, return -ENXIO);
462 snd_assert(rfile->input != NULL || rfile->output != NULL, return -ENXIO);
463 rmidi = rfile->rmidi;
464 down(&rmidi->open_mutex);
465 if (rfile->input != NULL) {
466 substream = rfile->input;
467 rfile->input = NULL;
468 runtime = substream->runtime;
469 runtime->trigger = 0;
470 substream->ops->trigger(substream, 0);
471 substream->ops->close(substream);
472 snd_rawmidi_done_buffer(runtime);
473 if (runtime->private_free != NULL)
474 runtime->private_free(substream);
475 kfree(runtime);
476 substream->runtime = NULL;
477 substream->opened = 0;
478 rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substream_opened--;
479 }
480 if (rfile->output != NULL) {
481 substream = rfile->output;
482 rfile->output = NULL;
483 if (--substream->use_count == 0) {
484 runtime = substream->runtime;
485 if (substream->active_sensing) {
486 unsigned char buf = 0xfe;
487 /* sending single active sensing message to shut the device up */
488 snd_rawmidi_kernel_write(substream, &buf, 1);
489 }
490 if (snd_rawmidi_drain_output(substream) == -ERESTARTSYS)
491 substream->ops->trigger(substream, 0);
492 substream->ops->close(substream);
493 snd_rawmidi_done_buffer(runtime);
494 if (runtime->private_free != NULL)
495 runtime->private_free(substream);
496 kfree(runtime);
497 substream->runtime = NULL;
498 substream->opened = 0;
499 substream->append = 0;
500 }
501 rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substream_opened--;
502 }
503 up(&rmidi->open_mutex);
504 module_put(rmidi->card->module);
505 return 0;
506 }
507
508 static int snd_rawmidi_release(struct inode *inode, struct file *file)
509 {
510 snd_rawmidi_file_t *rfile;
511 snd_rawmidi_t *rmidi;
512 int err;
513
514 rfile = file->private_data;
515 err = snd_rawmidi_kernel_release(rfile);
516 rmidi = rfile->rmidi;
517 wake_up(&rmidi->open_wait);
518 kfree(rfile);
519 snd_card_file_remove(rmidi->card, file);
520 return err;
521 }
522
523 int snd_rawmidi_info(snd_rawmidi_substream_t *substream, snd_rawmidi_info_t *info)
524 {
525 snd_rawmidi_t *rmidi;
526
527 if (substream == NULL)
528 return -ENODEV;
529 rmidi = substream->rmidi;
530 memset(info, 0, sizeof(*info));
531 info->card = rmidi->card->number;
532 info->device = rmidi->device;
533 info->subdevice = substream->number;
534 info->stream = substream->stream;
535 info->flags = rmidi->info_flags;
536 strcpy(info->id, rmidi->id);
537 strcpy(info->name, rmidi->name);
538 strcpy(info->subname, substream->name);
539 info->subdevices_count = substream->pstr->substream_count;
540 info->subdevices_avail = (substream->pstr->substream_count -
541 substream->pstr->substream_opened);
542 return 0;
543 }
544
545 static int snd_rawmidi_info_user(snd_rawmidi_substream_t *substream, snd_rawmidi_info_t __user * _info)
546 {
547 snd_rawmidi_info_t info;
548 int err;
549 if ((err = snd_rawmidi_info(substream, &info)) < 0)
550 return err;
551 if (copy_to_user(_info, &info, sizeof(snd_rawmidi_info_t)))
552 return -EFAULT;
553 return 0;
554 }
555
556 int snd_rawmidi_info_select(snd_card_t *card, snd_rawmidi_info_t *info)
557 {
558 snd_rawmidi_t *rmidi;
559 snd_rawmidi_str_t *pstr;
560 snd_rawmidi_substream_t *substream;
561 struct list_head *list;
562 if (info->device >= SNDRV_RAWMIDI_DEVICES)
563 return -ENXIO;
564 rmidi = snd_rawmidi_devices[card->number * SNDRV_RAWMIDI_DEVICES + info->device];
565 if (info->stream < 0 || info->stream > 1)
566 return -EINVAL;
567 pstr = &rmidi->streams[info->stream];
568 if (pstr->substream_count == 0)
569 return -ENOENT;
570 if (info->subdevice >= pstr->substream_count)
571 return -ENXIO;
572 list_for_each(list, &pstr->substreams) {
573 substream = list_entry(list, snd_rawmidi_substream_t, list);
574 if ((unsigned int)substream->number == info->subdevice)
575 return snd_rawmidi_info(substream, info);
576 }
577 return -ENXIO;
578 }
579
580 static int snd_rawmidi_info_select_user(snd_card_t *card,
581 snd_rawmidi_info_t __user *_info)
582 {
583 int err;
584 snd_rawmidi_info_t info;
585 if (get_user(info.device, &_info->device))
586 return -EFAULT;
587 if (get_user(info.stream, &_info->stream))
588 return -EFAULT;
589 if (get_user(info.subdevice, &_info->subdevice))
590 return -EFAULT;
591 if ((err = snd_rawmidi_info_select(card, &info)) < 0)
592 return err;
593 if (copy_to_user(_info, &info, sizeof(snd_rawmidi_info_t)))
594 return -EFAULT;
595 return 0;
596 }
597
598 int snd_rawmidi_output_params(snd_rawmidi_substream_t * substream,
599 snd_rawmidi_params_t * params)
600 {
601 char *newbuf;
602 snd_rawmidi_runtime_t *runtime = substream->runtime;
603
604 if (substream->append && substream->use_count > 1)
605 return -EBUSY;
606 snd_rawmidi_drain_output(substream);
607 if (params->buffer_size < 32 || params->buffer_size > 1024L * 1024L) {
608 return -EINVAL;
609 }
610 if (params->avail_min < 1 || params->avail_min > params->buffer_size) {
611 return -EINVAL;
612 }
613 if (params->buffer_size != runtime->buffer_size) {
614 if ((newbuf = (char *) kmalloc(params->buffer_size, GFP_KERNEL)) == NULL)
615 return -ENOMEM;
616 kfree(runtime->buffer);
617 runtime->buffer = newbuf;
618 runtime->buffer_size = params->buffer_size;
619 }
620 runtime->avail_min = params->avail_min;
621 substream->active_sensing = !params->no_active_sensing;
622 return 0;
623 }
624
625 int snd_rawmidi_input_params(snd_rawmidi_substream_t * substream,
626 snd_rawmidi_params_t * params)
627 {
628 char *newbuf;
629 snd_rawmidi_runtime_t *runtime = substream->runtime;
630
631 snd_rawmidi_drain_input(substream);
632 if (params->buffer_size < 32 || params->buffer_size > 1024L * 1024L) {
633 return -EINVAL;
634 }
635 if (params->avail_min < 1 || params->avail_min > params->buffer_size) {
636 return -EINVAL;
637 }
638 if (params->buffer_size != runtime->buffer_size) {
639 if ((newbuf = (char *) kmalloc(params->buffer_size, GFP_KERNEL)) == NULL)
640 return -ENOMEM;
641 kfree(runtime->buffer);
642 runtime->buffer = newbuf;
643 runtime->buffer_size = params->buffer_size;
644 }
645 runtime->avail_min = params->avail_min;
646 return 0;
647 }
648
649 static int snd_rawmidi_output_status(snd_rawmidi_substream_t * substream,
650 snd_rawmidi_status_t * status)
651 {
652 snd_rawmidi_runtime_t *runtime = substream->runtime;
653
654 memset(status, 0, sizeof(*status));
655 status->stream = SNDRV_RAWMIDI_STREAM_OUTPUT;
656 spin_lock_irq(&runtime->lock);
657 status->avail = runtime->avail;
658 spin_unlock_irq(&runtime->lock);
659 return 0;
660 }
661
662 static int snd_rawmidi_input_status(snd_rawmidi_substream_t * substream,
663 snd_rawmidi_status_t * status)
664 {
665 snd_rawmidi_runtime_t *runtime = substream->runtime;
666
667 memset(status, 0, sizeof(*status));
668 status->stream = SNDRV_RAWMIDI_STREAM_INPUT;
669 spin_lock_irq(&runtime->lock);
670 status->avail = runtime->avail;
671 status->xruns = runtime->xruns;
672 runtime->xruns = 0;
673 spin_unlock_irq(&runtime->lock);
674 return 0;
675 }
676
677 static inline int _snd_rawmidi_ioctl(struct inode *inode, struct file *file,
678 unsigned int cmd, unsigned long arg)
679 {
680 snd_rawmidi_file_t *rfile;
681 void __user *argp = (void __user *)arg;
682
683 rfile = file->private_data;
684 if (((cmd >> 8) & 0xff) != 'W')
685 return -ENOTTY;
686 switch (cmd) {
687 case SNDRV_RAWMIDI_IOCTL_PVERSION:
688 return put_user(SNDRV_RAWMIDI_VERSION, (int __user *)argp) ? -EFAULT : 0;
689 case SNDRV_RAWMIDI_IOCTL_INFO:
690 {
691 snd_rawmidi_stream_t stream;
692 snd_rawmidi_info_t __user *info = argp;
693 if (get_user(stream, &info->stream))
694 return -EFAULT;
695 switch (stream) {
696 case SNDRV_RAWMIDI_STREAM_INPUT:
697 return snd_rawmidi_info_user(rfile->input, info);
698 case SNDRV_RAWMIDI_STREAM_OUTPUT:
699 return snd_rawmidi_info_user(rfile->output, info);
700 default:
701 return -EINVAL;
702 }
703 }
704 case SNDRV_RAWMIDI_IOCTL_PARAMS:
705 {
706 snd_rawmidi_params_t params;
707 if (copy_from_user(&params, argp, sizeof(snd_rawmidi_params_t)))
708 return -EFAULT;
709 switch (params.stream) {
710 case SNDRV_RAWMIDI_STREAM_OUTPUT:
711 if (rfile->output == NULL)
712 return -EINVAL;
713 return snd_rawmidi_output_params(rfile->output, &params);
714 case SNDRV_RAWMIDI_STREAM_INPUT:
715 if (rfile->input == NULL)
716 return -EINVAL;
717 return snd_rawmidi_input_params(rfile->input, &params);
718 default:
719 return -EINVAL;
720 }
721 }
722 case SNDRV_RAWMIDI_IOCTL_STATUS:
723 {
724 int err = 0;
725 snd_rawmidi_status_t status;
726 if (copy_from_user(&status, argp, sizeof(snd_rawmidi_status_t)))
727 return -EFAULT;
728 switch (status.stream) {
729 case SNDRV_RAWMIDI_STREAM_OUTPUT:
730 if (rfile->output == NULL)
731 return -EINVAL;
732 err = snd_rawmidi_output_status(rfile->output, &status);
733 break;
734 case SNDRV_RAWMIDI_STREAM_INPUT:
735 if (rfile->input == NULL)
736 return -EINVAL;
737 err = snd_rawmidi_input_status(rfile->input, &status);
738 break;
739 default:
740 return -EINVAL;
741 }
742 if (err < 0)
743 return err;
744 if (copy_to_user(argp, &status, sizeof(snd_rawmidi_status_t)))
745 return -EFAULT;
746 return 0;
747 }
748 case SNDRV_RAWMIDI_IOCTL_DROP:
749 {
750 int val;
751 if (get_user(val, (long __user *) argp))
752 return -EFAULT;
753 switch (val) {
754 case SNDRV_RAWMIDI_STREAM_OUTPUT:
755 if (rfile->output == NULL)
756 return -EINVAL;
757 return snd_rawmidi_drop_output(rfile->output);
758 default:
759 return -EINVAL;
760 }
761 }
762 case SNDRV_RAWMIDI_IOCTL_DRAIN:
763 {
764 int val;
765 if (get_user(val, (long __user *) argp))
766 return -EFAULT;
767 switch (val) {
768 case SNDRV_RAWMIDI_STREAM_OUTPUT:
769 if (rfile->output == NULL)
770 return -EINVAL;
771 return snd_rawmidi_drain_output(rfile->output);
772 case SNDRV_RAWMIDI_STREAM_INPUT:
773 if (rfile->input == NULL)
774 return -EINVAL;
775 return snd_rawmidi_drain_input(rfile->input);
776 default:
777 return -EINVAL;
778 }
779 }
780 #ifdef CONFIG_SND_DEBUG
781 default:
782 snd_printk(KERN_WARNING "rawmidi: unknown command = 0x%x\n", cmd);
783 #endif
784 }
785 return -ENOTTY;
786 }
787
788 /* FIXME: need to unlock BKL to allow preemption */
789 static int snd_rawmidi_ioctl(struct inode *inode, struct file *file,
790 unsigned int cmd, unsigned long arg)
791 {
792 int err;
793 unlock_kernel();
794 err = _snd_rawmidi_ioctl(inode, file, cmd, arg);
795 lock_kernel();
796 return err;
797 }
798
799 int snd_rawmidi_control_ioctl(snd_card_t * card, snd_ctl_file_t * control,
800 unsigned int cmd, unsigned long arg)
801 {
802 void __user *argp = (void __user *)arg;
803 unsigned int tmp;
804
805 tmp = card->number * SNDRV_RAWMIDI_DEVICES;
806 switch (cmd) {
807 case SNDRV_CTL_IOCTL_RAWMIDI_NEXT_DEVICE:
808 {
809 int device;
810
811 if (get_user(device, (int __user *)argp))
812 return -EFAULT;
813 device = device < 0 ? 0 : device + 1;
814 while (device < SNDRV_RAWMIDI_DEVICES) {
815 if (snd_rawmidi_devices[tmp + device])
816 break;
817 device++;
818 }
819 if (device == SNDRV_RAWMIDI_DEVICES)
820 device = -1;
821 if (put_user(device, (int __user *)argp))
822 return -EFAULT;
823 return 0;
824 }
825 case SNDRV_CTL_IOCTL_RAWMIDI_PREFER_SUBDEVICE:
826 {
827 int val;
828
829 if (get_user(val, (int __user *)argp))
830 return -EFAULT;
831 control->prefer_rawmidi_subdevice = val;
832 return 0;
833 }
834 case SNDRV_CTL_IOCTL_RAWMIDI_INFO:
835 return snd_rawmidi_info_select_user(card, argp);
836 }
837 return -ENOIOCTLCMD;
838 }
839
840 /**
841 * snd_rawmidi_receive - receive the input data from the device
842 * @substream: the rawmidi substream
843 * @buffer: the buffer pointer
844 * @count: the data size to read
845 *
846 * Reads the data from the internal buffer.
847 *
848 * Returns the size of read data, or a negative error code on failure.
849 */
850 int snd_rawmidi_receive(snd_rawmidi_substream_t * substream, const unsigned char *buffer, int count)
851 {
852 unsigned long flags;
853 int result = 0, count1;
854 snd_rawmidi_runtime_t *runtime = substream->runtime;
855
856 if (runtime->buffer == NULL) {
857 snd_printd("snd_rawmidi_receive: input is not active!!!\n");
858 return -EINVAL;
859 }
860 spin_lock_irqsave(&runtime->lock, flags);
861 if (count == 1) { /* special case, faster code */
862 substream->bytes++;
863 if (runtime->avail < runtime->buffer_size) {
864 runtime->buffer[runtime->hw_ptr++] = buffer[0];
865 runtime->hw_ptr %= runtime->buffer_size;
866 runtime->avail++;
867 result++;
868 } else {
869 runtime->xruns++;
870 }
871 } else {
872 substream->bytes += count;
873 count1 = runtime->buffer_size - runtime->hw_ptr;
874 if (count1 > count)
875 count1 = count;
876 if (count1 > (int)(runtime->buffer_size - runtime->avail))
877 count1 = runtime->buffer_size - runtime->avail;
878 memcpy(runtime->buffer + runtime->hw_ptr, buffer, count1);
879 runtime->hw_ptr += count1;
880 runtime->hw_ptr %= runtime->buffer_size;
881 runtime->avail += count1;
882 count -= count1;
883 result += count1;
884 if (count > 0) {
885 buffer += count1;
886 count1 = count;
887 if (count1 > (int)(runtime->buffer_size - runtime->avail)) {
888 count1 = runtime->buffer_size - runtime->avail;
889 runtime->xruns = count - count1;
890 }
891 if (count1 > 0) {
892 memcpy(runtime->buffer, buffer, count1);
893 runtime->hw_ptr = count1;
894 runtime->avail += count1;
895 result += count1;
896 }
897 }
898 }
899 if (result > 0 && runtime->event == NULL) {
900 if (snd_rawmidi_ready(substream))
901 wake_up(&runtime->sleep);
902 }
903 spin_unlock_irqrestore(&runtime->lock, flags);
904 if (result > 0 && runtime->event)
905 runtime->event(substream);
906 return result;
907 }
908
909 static long snd_rawmidi_kernel_read1(snd_rawmidi_substream_t *substream,
910 unsigned char *buf, long count, int kernel)
911 {
912 unsigned long flags;
913 long result = 0, count1;
914 snd_rawmidi_runtime_t *runtime = substream->runtime;
915
916 while (count > 0 && runtime->avail) {
917 count1 = runtime->buffer_size - runtime->appl_ptr;
918 if (count1 > count)
919 count1 = count;
920 spin_lock_irqsave(&runtime->lock, flags);
921 if (count1 > (int)runtime->avail)
922 count1 = runtime->avail;
923 if (kernel) {
924 memcpy(buf + result, runtime->buffer + runtime->appl_ptr, count1);
925 } else {
926 spin_unlock_irqrestore(&runtime->lock, flags);
927 if (copy_to_user(buf + result, runtime->buffer + runtime->appl_ptr, count1)) {
928 return result > 0 ? result : -EFAULT;
929 }
930 spin_lock_irqsave(&runtime->lock, flags);
931 }
932 runtime->appl_ptr += count1;
933 runtime->appl_ptr %= runtime->buffer_size;
934 runtime->avail -= count1;
935 spin_unlock_irqrestore(&runtime->lock, flags);
936 result += count1;
937 count -= count1;
938 }
939 return result;
940 }
941
942 long snd_rawmidi_kernel_read(snd_rawmidi_substream_t *substream, unsigned char *buf, long count)
943 {
944 substream->runtime->trigger = 1;
945 substream->ops->trigger(substream, 1);
946 return snd_rawmidi_kernel_read1(substream, buf, count, 1);
947 }
948
949 static ssize_t snd_rawmidi_read(struct file *file, char __user *buf, size_t count, loff_t *offset)
950 {
951 long result;
952 int count1;
953 snd_rawmidi_file_t *rfile;
954 snd_rawmidi_substream_t *substream;
955 snd_rawmidi_runtime_t *runtime;
956
957 rfile = file->private_data;
958 substream = rfile->input;
959 if (substream == NULL)
960 return -EIO;
961 runtime = substream->runtime;
962 runtime->trigger = 1;
963 substream->ops->trigger(substream, 1);
964 result = 0;
965 while (count > 0) {
966 spin_lock_irq(&runtime->lock);
967 while (!snd_rawmidi_ready(substream)) {
968 wait_queue_t wait;
969 if ((file->f_flags & O_NONBLOCK) != 0 || result > 0) {
970 spin_unlock_irq(&runtime->lock);
971 return result > 0 ? result : -EAGAIN;
972 }
973 init_waitqueue_entry(&wait, current);
974 add_wait_queue(&runtime->sleep, &wait);
975 set_current_state(TASK_INTERRUPTIBLE);
976 spin_unlock_irq(&runtime->lock);
977 schedule();
978 remove_wait_queue(&runtime->sleep, &wait);
979 if (signal_pending(current))
980 return result > 0 ? result : -ERESTARTSYS;
981 if (!runtime->avail)
982 return result > 0 ? result : -EIO;
983 spin_lock_irq(&runtime->lock);
984 }
985 spin_unlock_irq(&runtime->lock);
986 count1 = snd_rawmidi_kernel_read1(substream, buf, count, 0);
987 if (count1 < 0)
988 return result > 0 ? result : count1;
989 result += count1;
990 buf += count1;
991 count -= count1;
992 }
993 return result;
994 }
995
996 /**
997 * snd_rawmidi_transmit_empty - check whether the output buffer is empty
998 * @substream: the rawmidi substream
999 *
1000 * Returns 1 if the internal output buffer is empty, 0 if not.
1001 */
1002 int snd_rawmidi_transmit_empty(snd_rawmidi_substream_t * substream)
1003 {
1004 snd_rawmidi_runtime_t *runtime = substream->runtime;
1005 int result;
1006 unsigned long flags;
1007
1008 if (runtime->buffer == NULL) {
1009 snd_printd("snd_rawmidi_transmit_empty: output is not active!!!\n");
1010 return 1;
1011 }
1012 spin_lock_irqsave(&runtime->lock, flags);
1013 result = runtime->avail >= runtime->buffer_size;
1014 if (result)
1015 runtime->trigger = 1;
1016 spin_unlock_irqrestore(&runtime->lock, flags);
1017 return result;
1018 }
1019
1020 /**
1021 * snd_rawmidi_transmit_peek - copy data from the internal buffer
1022 * @substream: the rawmidi substream
1023 * @buffer: the buffer pointer
1024 * @count: data size to transfer
1025 *
1026 * Copies data from the internal output buffer to the given buffer.
1027 *
1028 * Call this in the interrupt handler when the midi output is ready,
1029 * and call snd_rawmidi_transmit_ack() after the transmission is
1030 * finished.
1031 *
1032 * Returns the size of copied data, or a negative error code on failure.
1033 */
1034 int snd_rawmidi_transmit_peek(snd_rawmidi_substream_t * substream, unsigned char *buffer, int count)
1035 {
1036 unsigned long flags;
1037 int result, count1;
1038 snd_rawmidi_runtime_t *runtime = substream->runtime;
1039
1040 if (runtime->buffer == NULL) {
1041 snd_printd("snd_rawmidi_transmit_peek: output is not active!!!\n");
1042 return -EINVAL;
1043 }
1044 result = 0;
1045 spin_lock_irqsave(&runtime->lock, flags);
1046 if (runtime->avail >= runtime->buffer_size) {
1047 /* warning: lowlevel layer MUST trigger down the hardware */
1048 runtime->trigger = 0;
1049 goto __skip;
1050 }
1051 if (count == 1) { /* special case, faster code */
1052 *buffer = runtime->buffer[runtime->hw_ptr];
1053 result++;
1054 } else {
1055 count1 = runtime->buffer_size - runtime->hw_ptr;
1056 if (count1 > count)
1057 count1 = count;
1058 if (count1 > (int)(runtime->buffer_size - runtime->avail))
1059 count1 = runtime->buffer_size - runtime->avail;
1060 memcpy(buffer, runtime->buffer + runtime->hw_ptr, count1);
1061 count -= count1;
1062 result += count1;
1063 if (count > 0)
1064 memcpy(buffer + count1, runtime->buffer, count);
1065 }
1066 __skip:
1067 spin_unlock_irqrestore(&runtime->lock, flags);
1068 return result;
1069 }
1070
1071 /**
1072 * snd_rawmidi_transmit_ack - acknowledge the transmission
1073 * @substream: the rawmidi substream
1074 * @count: the tranferred count
1075 *
1076 * Advances the hardware pointer for the internal output buffer with
1077 * the given size and updates the condition.
1078 * Call after the transmission is finished.
1079 *
1080 * Returns the advanced size if successful, or a negative error code on failure.
1081 */
1082 int snd_rawmidi_transmit_ack(snd_rawmidi_substream_t * substream, int count)
1083 {
1084 unsigned long flags;
1085 snd_rawmidi_runtime_t *runtime = substream->runtime;
1086
1087 if (runtime->buffer == NULL) {
1088 snd_printd("snd_rawmidi_transmit_ack: output is not active!!!\n");
1089 return -EINVAL;
1090 }
1091 spin_lock_irqsave(&runtime->lock, flags);
1092 snd_assert(runtime->avail + count <= runtime->buffer_size, );
1093 runtime->hw_ptr += count;
1094 runtime->hw_ptr %= runtime->buffer_size;
1095 runtime->avail += count;
1096 substream->bytes += count;
1097 if (runtime->drain)
1098 wake_up(&runtime->sleep);
1099 else
1100 if (count > 0 && runtime->event == NULL)
1101 if (snd_rawmidi_ready(substream))
1102 wake_up(&runtime->sleep);
1103 spin_unlock_irqrestore(&runtime->lock, flags);
1104 if (count > 0 && runtime->event)
1105 runtime->event(substream);
1106 return count;
1107 }
1108
1109 /**
1110 * snd_rawmidi_transmit - copy from the buffer to the device
1111 * @substream: the rawmidi substream
1112 * @buf: the buffer pointer
1113 * @count: the data size to transfer
1114 *
1115 * Copies data from the buffer to the device and advances the pointer.
1116 *
1117 * Returns the copied size if successful, or a negative error code on failure.
1118 */
1119 int snd_rawmidi_transmit(snd_rawmidi_substream_t * substream, unsigned char *buffer, int count)
1120 {
1121 count = snd_rawmidi_transmit_peek(substream, buffer, count);
1122 if (count < 0)
1123 return count;
1124 return snd_rawmidi_transmit_ack(substream, count);
1125 }
1126
1127 static long snd_rawmidi_kernel_write1(snd_rawmidi_substream_t * substream, const unsigned char *buf, long count, int kernel)
1128 {
1129 unsigned long flags;
1130 long count1, result;
1131 snd_rawmidi_runtime_t *runtime = substream->runtime;
1132
1133 snd_assert(buf != NULL, return -EINVAL);
1134 snd_assert(runtime->buffer != NULL, return -EINVAL);
1135
1136 result = 0;
1137 spin_lock_irqsave(&runtime->lock, flags);
1138 if (substream->append) {
1139 if ((long)runtime->avail < count) {
1140 spin_unlock_irqrestore(&runtime->lock, flags);
1141 return -EAGAIN;
1142 }
1143 }
1144 while (count > 0 && runtime->avail > 0) {
1145 count1 = runtime->buffer_size - runtime->appl_ptr;
1146 if (count1 > count)
1147 count1 = count;
1148 if (count1 > (long)runtime->avail)
1149 count1 = runtime->avail;
1150 if (kernel) {
1151 memcpy(runtime->buffer + runtime->appl_ptr, buf, count1);
1152 } else {
1153 spin_unlock_irqrestore(&runtime->lock, flags);
1154 if (copy_from_user(runtime->buffer + runtime->appl_ptr, buf, count1)) {
1155 spin_lock_irqsave(&runtime->lock, flags);
1156 result = result > 0 ? result : -EFAULT;
1157 goto __end;
1158 }
1159 spin_lock_irqsave(&runtime->lock, flags);
1160 }
1161 runtime->appl_ptr += count1;
1162 runtime->appl_ptr %= runtime->buffer_size;
1163 runtime->avail -= count1;
1164 result += count1;
1165 buf += count1;
1166 count -= count1;
1167 }
1168 __end:
1169 if (result > 0)
1170 runtime->trigger = 1;
1171 count1 = runtime->avail < runtime->buffer_size;
1172 spin_unlock_irqrestore(&runtime->lock, flags);
1173 if (count1)
1174 substream->ops->trigger(substream, 1);
1175 return result;
1176 }
1177
1178 long snd_rawmidi_kernel_write(snd_rawmidi_substream_t * substream, const unsigned char *buf, long count)
1179 {
1180 return snd_rawmidi_kernel_write1(substream, buf, count, 1);
1181 }
1182
1183 static ssize_t snd_rawmidi_write(struct file *file, const char __user *buf, size_t count, loff_t *offset)
1184 {
1185 long result, timeout;
1186 int count1;
1187 snd_rawmidi_file_t *rfile;
1188 snd_rawmidi_runtime_t *runtime;
1189 snd_rawmidi_substream_t *substream;
1190
1191 rfile = file->private_data;
1192 substream = rfile->output;
1193 runtime = substream->runtime;
1194 /* we cannot put an atomic message to our buffer */
1195 if (substream->append && count > runtime->buffer_size)
1196 return -EIO;
1197 result = 0;
1198 while (count > 0) {
1199 spin_lock_irq(&runtime->lock);
1200 while (!snd_rawmidi_ready_append(substream, count)) {
1201 wait_queue_t wait;
1202 if (file->f_flags & O_NONBLOCK) {
1203 spin_unlock_irq(&runtime->lock);
1204 return result > 0 ? result : -EAGAIN;
1205 }
1206 init_waitqueue_entry(&wait, current);
1207 add_wait_queue(&runtime->sleep, &wait);
1208 set_current_state(TASK_INTERRUPTIBLE);
1209 spin_unlock_irq(&runtime->lock);
1210 timeout = schedule_timeout(30 * HZ);
1211 remove_wait_queue(&runtime->sleep, &wait);
1212 if (signal_pending(current))
1213 return result > 0 ? result : -ERESTARTSYS;
1214 if (!runtime->avail && !timeout)
1215 return result > 0 ? result : -EIO;
1216 spin_lock_irq(&runtime->lock);
1217 }
1218 spin_unlock_irq(&runtime->lock);
1219 count1 = snd_rawmidi_kernel_write1(substream, buf, count, 0);
1220 if (count1 < 0)
1221 return result > 0 ? result : count1;
1222 result += count1;
1223 buf += count1;
1224 if ((size_t)count1 < count && (file->f_flags & O_NONBLOCK))
1225 break;
1226 count -= count1;
1227 }
1228 if (file->f_flags & O_SYNC) {
1229 spin_lock_irq(&runtime->lock);
1230 while (runtime->avail != runtime->buffer_size) {
1231 wait_queue_t wait;
1232 unsigned int last_avail = runtime->avail;
1233 init_waitqueue_entry(&wait, current);
1234 add_wait_queue(&runtime->sleep, &wait);
1235 set_current_state(TASK_INTERRUPTIBLE);
1236 spin_unlock_irq(&runtime->lock);
1237 timeout = schedule_timeout(30 * HZ);
1238 remove_wait_queue(&runtime->sleep, &wait);
1239 if (signal_pending(current))
1240 return result > 0 ? result : -ERESTARTSYS;
1241 if (runtime->avail == last_avail && !timeout)
1242 return result > 0 ? result : -EIO;
1243 spin_lock_irq(&runtime->lock);
1244 }
1245 spin_unlock_irq(&runtime->lock);
1246 }
1247 return result;
1248 }
1249
1250 static unsigned int snd_rawmidi_poll(struct file *file, poll_table * wait)
1251 {
1252 snd_rawmidi_file_t *rfile;
1253 snd_rawmidi_runtime_t *runtime;
1254 unsigned int mask;
1255
1256 rfile = file->private_data;
1257 if (rfile->input != NULL) {
1258 runtime = rfile->input->runtime;
1259 runtime->trigger = 1;
1260 rfile->input->ops->trigger(rfile->input, 1);
1261 poll_wait(file, &runtime->sleep, wait);
1262 }
1263 if (rfile->output != NULL) {
1264 runtime = rfile->output->runtime;
1265 poll_wait(file, &runtime->sleep, wait);
1266 }
1267 mask = 0;
1268 if (rfile->input != NULL) {
1269 if (snd_rawmidi_ready(rfile->input))
1270 mask |= POLLIN | POLLRDNORM;
1271 }
1272 if (rfile->output != NULL) {
1273 if (snd_rawmidi_ready(rfile->output))
1274 mask |= POLLOUT | POLLWRNORM;
1275 }
1276 return mask;
1277 }
1278
1279 /*
1280
1281 */
1282
1283 static void snd_rawmidi_proc_info_read(snd_info_entry_t *entry,
1284 snd_info_buffer_t * buffer)
1285 {
1286 snd_rawmidi_t *rmidi;
1287 snd_rawmidi_substream_t *substream;
1288 snd_rawmidi_runtime_t *runtime;
1289 struct list_head *list;
1290
1291 rmidi = entry->private_data;
1292 snd_iprintf(buffer, "%s\n\n", rmidi->name);
1293 down(&rmidi->open_mutex);
1294 if (rmidi->info_flags & SNDRV_RAWMIDI_INFO_OUTPUT) {
1295 list_for_each(list, &rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substreams) {
1296 substream = list_entry(list, snd_rawmidi_substream_t, list);
1297 snd_iprintf(buffer,
1298 "Output %d\n"
1299 " Tx bytes : %lu\n",
1300 substream->number,
1301 (unsigned long) substream->bytes);
1302 if (substream->opened) {
1303 runtime = substream->runtime;
1304 snd_iprintf(buffer,
1305 " Mode : %s\n"
1306 " Buffer size : %lu\n"
1307 " Avail : %lu\n",
1308 runtime->oss ? "OSS compatible" : "native",
1309 (unsigned long) runtime->buffer_size,
1310 (unsigned long) runtime->avail);
1311 }
1312 }
1313 }
1314 if (rmidi->info_flags & SNDRV_RAWMIDI_INFO_INPUT) {
1315 list_for_each(list, &rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substreams) {
1316 substream = list_entry(list, snd_rawmidi_substream_t, list);
1317 snd_iprintf(buffer,
1318 "Input %d\n"
1319 " Rx bytes : %lu\n",
1320 substream->number,
1321 (unsigned long) substream->bytes);
1322 if (substream->opened) {
1323 runtime = substream->runtime;
1324 snd_iprintf(buffer,
1325 " Buffer size : %lu\n"
1326 " Avail : %lu\n"
1327 " Overruns : %lu\n",
1328 (unsigned long) runtime->buffer_size,
1329 (unsigned long) runtime->avail,
1330 (unsigned long) runtime->xruns);
1331 }
1332 }
1333 }
1334 up(&rmidi->open_mutex);
1335 }
1336
1337 /*
1338 * Register functions
1339 */
1340
1341 static struct file_operations snd_rawmidi_f_ops =
1342 {
1343 .owner = THIS_MODULE,
1344 .read = snd_rawmidi_read,
1345 .write = snd_rawmidi_write,
1346 .open = snd_rawmidi_open,
1347 .release = snd_rawmidi_release,
1348 .poll = snd_rawmidi_poll,
1349 .ioctl = snd_rawmidi_ioctl,
1350 };
1351
1352 static snd_minor_t snd_rawmidi_reg =
1353 {
1354 .comment = "raw midi",
1355 .f_ops = &snd_rawmidi_f_ops,
1356 };
1357
1358 static int snd_rawmidi_alloc_substreams(snd_rawmidi_t *rmidi,
1359 snd_rawmidi_str_t *stream,
1360 int direction,
1361 int count)
1362 {
1363 snd_rawmidi_substream_t *substream;
1364 int idx;
1365
1366 INIT_LIST_HEAD(&stream->substreams);
1367 for (idx = 0; idx < count; idx++) {
1368 substream = kcalloc(1, sizeof(*substream), GFP_KERNEL);
1369 if (substream == NULL)
1370 return -ENOMEM;
1371 substream->stream = direction;
1372 substream->number = idx;
1373 substream->rmidi = rmidi;
1374 substream->pstr = stream;
1375 list_add_tail(&substream->list, &stream->substreams);
1376 stream->substream_count++;
1377 }
1378 return 0;
1379 }
1380
1381 /**
1382 * snd_rawmidi_new - create a rawmidi instance
1383 * @card: the card instance
1384 * @id: the id string
1385 * @device: the device index
1386 * @output_count: the number of output streams
1387 * @input_count: the number of input streams
1388 * @rrawmidi: the pointer to store the new rawmidi instance
1389 *
1390 * Creates a new rawmidi instance.
1391 * Use snd_rawmidi_set_ops() to set the operators to the new instance.
1392 *
1393 * Returns zero if successful, or a negative error code on failure.
1394 */
1395 int snd_rawmidi_new(snd_card_t * card, char *id, int device,
1396 int output_count, int input_count,
1397 snd_rawmidi_t ** rrawmidi)
1398 {
1399 snd_rawmidi_t *rmidi;
1400 int err;
1401 static snd_device_ops_t ops = {
1402 .dev_free = snd_rawmidi_dev_free,
1403 .dev_register = snd_rawmidi_dev_register,
1404 .dev_disconnect = snd_rawmidi_dev_disconnect,
1405 .dev_unregister = snd_rawmidi_dev_unregister
1406 };
1407
1408 snd_assert(rrawmidi != NULL, return -EINVAL);
1409 *rrawmidi = NULL;
1410 snd_assert(card != NULL, return -ENXIO);
1411 rmidi = kcalloc(1, sizeof(*rmidi), GFP_KERNEL);
1412 if (rmidi == NULL)
1413 return -ENOMEM;
1414 rmidi->card = card;
1415 rmidi->device = device;
1416 init_MUTEX(&rmidi->open_mutex);
1417 init_waitqueue_head(&rmidi->open_wait);
1418 if (id != NULL)
1419 strlcpy(rmidi->id, id, sizeof(rmidi->id));
1420 if ((err = snd_rawmidi_alloc_substreams(rmidi, &rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT], SNDRV_RAWMIDI_STREAM_INPUT, input_count)) < 0) {
1421 snd_rawmidi_free(rmidi);
1422 return err;
1423 }
1424 if ((err = snd_rawmidi_alloc_substreams(rmidi, &rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT], SNDRV_RAWMIDI_STREAM_OUTPUT, output_count)) < 0) {
1425 snd_rawmidi_free(rmidi);
1426 return err;
1427 }
1428 if ((err = snd_device_new(card, SNDRV_DEV_RAWMIDI, rmidi, &ops)) < 0) {
1429 snd_rawmidi_free(rmidi);
1430 return err;
1431 }
1432 *rrawmidi = rmidi;
1433 return 0;
1434 }
1435
1436 static void snd_rawmidi_free_substreams(snd_rawmidi_str_t *stream)
1437 {
1438 snd_rawmidi_substream_t *substream;
1439
1440 while (!list_empty(&stream->substreams)) {
1441 substream = list_entry(stream->substreams.next, snd_rawmidi_substream_t, list);
1442 list_del(&substream->list);
1443 kfree(substream);
1444 }
1445 }
1446
1447 static int snd_rawmidi_free(snd_rawmidi_t *rmidi)
1448 {
1449 snd_assert(rmidi != NULL, return -ENXIO);
1450 snd_rawmidi_free_substreams(&rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT]);
1451 snd_rawmidi_free_substreams(&rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT]);
1452 if (rmidi->private_free)
1453 rmidi->private_free(rmidi);
1454 kfree(rmidi);
1455 return 0;
1456 }
1457
1458 static int snd_rawmidi_dev_free(snd_device_t *device)
1459 {
1460 snd_rawmidi_t *rmidi = device->device_data;
1461 return snd_rawmidi_free(rmidi);
1462 }
1463
1464 #if defined(CONFIG_SND_SEQUENCER) || (defined(MODULE) && defined(CONFIG_SND_SEQUENCER_MODULE))
1465 static void snd_rawmidi_dev_seq_free(snd_seq_device_t *device)
1466 {
1467 snd_rawmidi_t *rmidi = device->private_data;
1468 rmidi->seq_dev = NULL;
1469 }
1470 #endif
1471
1472 static int snd_rawmidi_dev_register(snd_device_t *device)
1473 {
1474 int idx, err;
1475 snd_info_entry_t *entry;
1476 char name[16];
1477 snd_rawmidi_t *rmidi = device->device_data;
1478
1479 if (rmidi->device >= SNDRV_RAWMIDI_DEVICES)
1480 return -ENOMEM;
1481 down(&register_mutex);
1482 idx = (rmidi->card->number * SNDRV_RAWMIDI_DEVICES) + rmidi->device;
1483 if (snd_rawmidi_devices[idx] != NULL) {
1484 up(&register_mutex);
1485 return -EBUSY;
1486 }
1487 snd_rawmidi_devices[idx] = rmidi;
1488 sprintf(name, "midiC%iD%i", rmidi->card->number, rmidi->device);
1489 if ((err = snd_register_device(SNDRV_DEVICE_TYPE_RAWMIDI,
1490 rmidi->card, rmidi->device,
1491 &snd_rawmidi_reg, name)) < 0) {
1492 snd_printk(KERN_ERR "unable to register rawmidi device %i:%i\n", rmidi->card->number, rmidi->device);
1493 snd_rawmidi_devices[idx] = NULL;
1494 up(&register_mutex);
1495 return err;
1496 }
1497 if (rmidi->ops && rmidi->ops->dev_register &&
1498 (err = rmidi->ops->dev_register(rmidi)) < 0) {
1499 snd_unregister_device(SNDRV_DEVICE_TYPE_RAWMIDI, rmidi->card, rmidi->device);
1500 snd_rawmidi_devices[idx] = NULL;
1501 up(&register_mutex);
1502 return err;
1503 }
1504 #ifdef CONFIG_SND_OSSEMUL
1505 rmidi->ossreg = 0;
1506 if ((int)rmidi->device == midi_map[rmidi->card->number]) {
1507 if (snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_MIDI,
1508 rmidi->card, 0, &snd_rawmidi_reg, name) < 0) {
1509 snd_printk(KERN_ERR "unable to register OSS rawmidi device %i:%i\n", rmidi->card->number, 0);
1510 } else {
1511 rmidi->ossreg++;
1512 #ifdef SNDRV_OSS_INFO_DEV_MIDI
1513 snd_oss_info_register(SNDRV_OSS_INFO_DEV_MIDI, rmidi->card->number, rmidi->name);
1514 #endif
1515 }
1516 }
1517 if ((int)rmidi->device == amidi_map[rmidi->card->number]) {
1518 if (snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_MIDI,
1519 rmidi->card, 1, &snd_rawmidi_reg, name) < 0) {
1520 snd_printk(KERN_ERR "unable to register OSS rawmidi device %i:%i\n", rmidi->card->number, 1);
1521 } else {
1522 rmidi->ossreg++;
1523 }
1524 }
1525 #endif /* CONFIG_SND_OSSEMUL */
1526 up(&register_mutex);
1527 sprintf(name, "midi%d", rmidi->device);
1528 entry = snd_info_create_card_entry(rmidi->card, name, rmidi->card->proc_root);
1529 if (entry) {
1530 entry->private_data = rmidi;
1531 entry->c.text.read_size = 1024;
1532 entry->c.text.read = snd_rawmidi_proc_info_read;
1533 if (snd_info_register(entry) < 0) {
1534 snd_info_free_entry(entry);
1535 entry = NULL;
1536 }
1537 }
1538 rmidi->proc_entry = entry;
1539 #if defined(CONFIG_SND_SEQUENCER) || (defined(MODULE) && defined(CONFIG_SND_SEQUENCER_MODULE))
1540 if (!rmidi->ops || !rmidi->ops->dev_register) { /* own registration mechanism */
1541 if (snd_seq_device_new(rmidi->card, rmidi->device, SNDRV_SEQ_DEV_ID_MIDISYNTH, 0, &rmidi->seq_dev) >= 0) {
1542 rmidi->seq_dev->private_data = rmidi;
1543 rmidi->seq_dev->private_free = snd_rawmidi_dev_seq_free;
1544 sprintf(rmidi->seq_dev->name, "MIDI %d-%d", rmidi->card->number, rmidi->device);
1545 snd_device_register(rmidi->card, rmidi->seq_dev);
1546 }
1547 }
1548 #endif
1549 return 0;
1550 }
1551
1552 static int snd_rawmidi_dev_disconnect(snd_device_t *device)
1553 {
1554 snd_rawmidi_t *rmidi = device->device_data;
1555 int idx;
1556
1557 down(&register_mutex);
1558 idx = (rmidi->card->number * SNDRV_RAWMIDI_DEVICES) + rmidi->device;
1559 snd_rawmidi_devices[idx] = NULL;
1560 up(&register_mutex);
1561 return 0;
1562 }
1563
1564 static int snd_rawmidi_dev_unregister(snd_device_t *device)
1565 {
1566 int idx;
1567 snd_rawmidi_t *rmidi = device->device_data;
1568
1569 snd_assert(rmidi != NULL, return -ENXIO);
1570 down(&register_mutex);
1571 idx = (rmidi->card->number * SNDRV_RAWMIDI_DEVICES) + rmidi->device;
1572 snd_rawmidi_devices[idx] = NULL;
1573 if (rmidi->proc_entry) {
1574 snd_info_unregister(rmidi->proc_entry);
1575 rmidi->proc_entry = NULL;
1576 }
1577 #ifdef CONFIG_SND_OSSEMUL
1578 if (rmidi->ossreg) {
1579 if ((int)rmidi->device == midi_map[rmidi->card->number]) {
1580 snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_MIDI, rmidi->card, 0);
1581 #ifdef SNDRV_OSS_INFO_DEV_MIDI
1582 snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_MIDI, rmidi->card->number);
1583 #endif
1584 }
1585 if ((int)rmidi->device == amidi_map[rmidi->card->number])
1586 snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_MIDI, rmidi->card, 1);
1587 rmidi->ossreg = 0;
1588 }
1589 #endif /* CONFIG_SND_OSSEMUL */
1590 if (rmidi->ops && rmidi->ops->dev_unregister)
1591 rmidi->ops->dev_unregister(rmidi);
1592 snd_unregister_device(SNDRV_DEVICE_TYPE_RAWMIDI, rmidi->card, rmidi->device);
1593 up(&register_mutex);
1594 #if defined(CONFIG_SND_SEQUENCER) || (defined(MODULE) && defined(CONFIG_SND_SEQUENCER_MODULE))
1595 if (rmidi->seq_dev) {
1596 snd_device_free(rmidi->card, rmidi->seq_dev);
1597 rmidi->seq_dev = NULL;
1598 }
1599 #endif
1600 return snd_rawmidi_free(rmidi);
1601 }
1602
1603 /**
1604 * snd_rawmidi_set_ops - set the rawmidi operators
1605 * @rmidi: the rawmidi instance
1606 * @stream: the stream direction, SNDRV_RAWMIDI_STREAM_XXX
1607 * @ops: the operator table
1608 *
1609 * Sets the rawmidi operators for the given stream direction.
1610 */
1611 void snd_rawmidi_set_ops(snd_rawmidi_t *rmidi, int stream, snd_rawmidi_ops_t *ops)
1612 {
1613 struct list_head *list;
1614 snd_rawmidi_substream_t *substream;
1615
1616 list_for_each(list, &rmidi->streams[stream].substreams) {
1617 substream = list_entry(list, snd_rawmidi_substream_t, list);
1618 substream->ops = ops;
1619 }
1620 }
1621
1622 /*
1623 * ENTRY functions
1624 */
1625
1626 static int __init alsa_rawmidi_init(void)
1627 {
1628
1629 snd_ctl_register_ioctl(snd_rawmidi_control_ioctl);
1630 #ifdef CONFIG_SND_OSSEMUL
1631 { int i;
1632 /* check device map table */
1633 for (i = 0; i < SNDRV_CARDS; i++) {
1634 if (midi_map[i] < 0 || midi_map[i] >= SNDRV_RAWMIDI_DEVICES) {
1635 snd_printk(KERN_ERR "invalid midi_map[%d] = %d\n", i, midi_map[i]);
1636 midi_map[i] = 0;
1637 }
1638 if (amidi_map[i] < 0 || amidi_map[i] >= SNDRV_RAWMIDI_DEVICES) {
1639 snd_printk(KERN_ERR "invalid amidi_map[%d] = %d\n", i, amidi_map[i]);
1640 amidi_map[i] = 1;
1641 }
1642 }
1643 }
1644 #endif /* CONFIG_SND_OSSEMUL */
1645 return 0;
1646 }
1647
1648 static void __exit alsa_rawmidi_exit(void)
1649 {
1650 snd_ctl_unregister_ioctl(snd_rawmidi_control_ioctl);
1651 }
1652
1653 module_init(alsa_rawmidi_init)
1654 module_exit(alsa_rawmidi_exit)
1655
1656 EXPORT_SYMBOL(snd_rawmidi_output_params);
1657 EXPORT_SYMBOL(snd_rawmidi_input_params);
1658 EXPORT_SYMBOL(snd_rawmidi_drop_output);
1659 EXPORT_SYMBOL(snd_rawmidi_drain_output);
1660 EXPORT_SYMBOL(snd_rawmidi_drain_input);
1661 EXPORT_SYMBOL(snd_rawmidi_receive);
1662 EXPORT_SYMBOL(snd_rawmidi_transmit_empty);
1663 EXPORT_SYMBOL(snd_rawmidi_transmit_peek);
1664 EXPORT_SYMBOL(snd_rawmidi_transmit_ack);
1665 EXPORT_SYMBOL(snd_rawmidi_transmit);
1666 EXPORT_SYMBOL(snd_rawmidi_new);
1667 EXPORT_SYMBOL(snd_rawmidi_set_ops);
1668 EXPORT_SYMBOL(snd_rawmidi_info);
1669 EXPORT_SYMBOL(snd_rawmidi_info_select);
1670 EXPORT_SYMBOL(snd_rawmidi_kernel_open);
1671 EXPORT_SYMBOL(snd_rawmidi_kernel_release);
1672 EXPORT_SYMBOL(snd_rawmidi_kernel_read);
1673 EXPORT_SYMBOL(snd_rawmidi_kernel_write);
MOXA 2.6.9 from sdlinux-moxaart.tgz