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1da177e4 LT |
1 | /* |
2 | * Abstract layer for MIDI v1.0 stream | |
3 | * Copyright (c) by Jaroslav Kysela <perex@suse.cz> | |
4 | * | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation; either version 2 of the License, or | |
9 | * (at your option) any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with this program; if not, write to the Free Software | |
18 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
19 | * | |
20 | */ | |
21 | ||
22 | #include <sound/driver.h> | |
23 | #include <sound/core.h> | |
24 | #include <linux/major.h> | |
25 | #include <linux/init.h> | |
26 | #include <linux/smp_lock.h> | |
27 | #include <linux/sched.h> | |
28 | #include <linux/slab.h> | |
29 | #include <linux/time.h> | |
30 | #include <linux/wait.h> | |
31 | #include <linux/moduleparam.h> | |
32 | #include <linux/delay.h> | |
33 | #include <linux/wait.h> | |
34 | #include <sound/rawmidi.h> | |
35 | #include <sound/info.h> | |
36 | #include <sound/control.h> | |
37 | #include <sound/minors.h> | |
38 | #include <sound/initval.h> | |
39 | ||
40 | MODULE_AUTHOR("Jaroslav Kysela <perex@suse.cz>"); | |
41 | MODULE_DESCRIPTION("Midlevel RawMidi code for ALSA."); | |
42 | MODULE_LICENSE("GPL"); | |
43 | ||
44 | #ifdef CONFIG_SND_OSSEMUL | |
45 | static int midi_map[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS-1)] = 0}; | |
46 | static int amidi_map[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS-1)] = 1}; | |
47 | module_param_array(midi_map, int, NULL, 0444); | |
48 | MODULE_PARM_DESC(midi_map, "Raw MIDI device number assigned to 1st OSS device."); | |
49 | module_param_array(amidi_map, int, NULL, 0444); | |
50 | MODULE_PARM_DESC(amidi_map, "Raw MIDI device number assigned to 2nd OSS device."); | |
51 | #endif /* CONFIG_SND_OSSEMUL */ | |
52 | ||
53 | static int snd_rawmidi_free(snd_rawmidi_t *rawmidi); | |
54 | static int snd_rawmidi_dev_free(snd_device_t *device); | |
55 | static int snd_rawmidi_dev_register(snd_device_t *device); | |
56 | static int snd_rawmidi_dev_disconnect(snd_device_t *device); | |
57 | static int snd_rawmidi_dev_unregister(snd_device_t *device); | |
58 | ||
59 | static snd_rawmidi_t *snd_rawmidi_devices[SNDRV_CARDS * SNDRV_RAWMIDI_DEVICES]; | |
60 | ||
61 | static DECLARE_MUTEX(register_mutex); | |
62 | ||
63 | static inline unsigned short snd_rawmidi_file_flags(struct file *file) | |
64 | { | |
65 | switch (file->f_mode & (FMODE_READ | FMODE_WRITE)) { | |
66 | case FMODE_WRITE: | |
67 | return SNDRV_RAWMIDI_LFLG_OUTPUT; | |
68 | case FMODE_READ: | |
69 | return SNDRV_RAWMIDI_LFLG_INPUT; | |
70 | default: | |
71 | return SNDRV_RAWMIDI_LFLG_OPEN; | |
72 | } | |
73 | } | |
74 | ||
75 | static inline int snd_rawmidi_ready(snd_rawmidi_substream_t * substream) | |
76 | { | |
77 | snd_rawmidi_runtime_t *runtime = substream->runtime; | |
78 | return runtime->avail >= runtime->avail_min; | |
79 | } | |
80 | ||
81 | static 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 | ||
88 | static 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 | ||
94 | static 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 | ||
100 | static 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 | ||
132 | static 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 | ||
142 | static 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 | ||
152 | static 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 | ||
159 | int 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 | ||
173 | int 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 | ||
202 | int 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 | ||
216 | int 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 | ||
367 | static 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 | ||
472 | int 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 | ||
520 | static 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 | ||
535 | int 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 | ||
557 | static 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 | ||
568 | int 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 | ||
592 | static 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 | ||
610 | int 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 | ||
637 | int 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 | ||
661 | static 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 | ||
674 | static 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 | ||
689 | static 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(¶ms, 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, ¶ms); | |
725 | case SNDRV_RAWMIDI_STREAM_INPUT: | |
726 | if (rfile->input == NULL) | |
727 | return -EINVAL; | |
728 | return snd_rawmidi_input_params(rfile->input, ¶ms); | |
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 | ||
799 | static 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 | */ | |
852 | int 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 | ||
911 | static 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 | ||
945 | long 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 | ||
951 | static 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 | */ | |
1003 | int 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 | */ | |
1033 | int 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 | */ | |
1084 | int 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 | */ | |
1117 | int 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 | ||
1125 | static 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 | ||
1175 | long 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 | ||
1180 | static 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 | ||
1247 | static 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 | ||
1287 | static 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 | ||
1345 | static 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 | ||
1357 | static snd_minor_t snd_rawmidi_reg = | |
1358 | { | |
1359 | .comment = "raw midi", | |
1360 | .f_ops = &snd_rawmidi_f_ops, | |
1361 | }; | |
1362 | ||
1363 | static 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 | */ | |
1400 | int 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 | ||
1441 | static 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 | ||
1452 | static 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 | ||
1463 | static 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)) | |
1470 | static 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 | ||
1477 | static 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(®ister_mutex); | |
1487 | idx = (rmidi->card->number * SNDRV_RAWMIDI_DEVICES) + rmidi->device; | |
1488 | if (snd_rawmidi_devices[idx] != NULL) { | |
1489 | up(®ister_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(®ister_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(®ister_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(®ister_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 | ||
1557 | static int snd_rawmidi_dev_disconnect(snd_device_t *device) | |
1558 | { | |
1559 | snd_rawmidi_t *rmidi = device->device_data; | |
1560 | int idx; | |
1561 | ||
1562 | down(®ister_mutex); | |
1563 | idx = (rmidi->card->number * SNDRV_RAWMIDI_DEVICES) + rmidi->device; | |
1564 | snd_rawmidi_devices[idx] = NULL; | |
1565 | up(®ister_mutex); | |
1566 | return 0; | |
1567 | } | |
1568 | ||
1569 | static 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(®ister_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(®ister_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 | */ | |
1616 | void 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 | ||
1631 | static 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 | ||
1654 | static 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 | ||
1660 | module_init(alsa_rawmidi_init) | |
1661 | module_exit(alsa_rawmidi_exit) | |
1662 | ||
1663 | EXPORT_SYMBOL(snd_rawmidi_output_params); | |
1664 | EXPORT_SYMBOL(snd_rawmidi_input_params); | |
1665 | EXPORT_SYMBOL(snd_rawmidi_drop_output); | |
1666 | EXPORT_SYMBOL(snd_rawmidi_drain_output); | |
1667 | EXPORT_SYMBOL(snd_rawmidi_drain_input); | |
1668 | EXPORT_SYMBOL(snd_rawmidi_receive); | |
1669 | EXPORT_SYMBOL(snd_rawmidi_transmit_empty); | |
1670 | EXPORT_SYMBOL(snd_rawmidi_transmit_peek); | |
1671 | EXPORT_SYMBOL(snd_rawmidi_transmit_ack); | |
1672 | EXPORT_SYMBOL(snd_rawmidi_transmit); | |
1673 | EXPORT_SYMBOL(snd_rawmidi_new); | |
1674 | EXPORT_SYMBOL(snd_rawmidi_set_ops); | |
1675 | EXPORT_SYMBOL(snd_rawmidi_info); | |
1676 | EXPORT_SYMBOL(snd_rawmidi_info_select); | |
1677 | EXPORT_SYMBOL(snd_rawmidi_kernel_open); | |
1678 | EXPORT_SYMBOL(snd_rawmidi_kernel_release); | |
1679 | EXPORT_SYMBOL(snd_rawmidi_kernel_read); | |
1680 | EXPORT_SYMBOL(snd_rawmidi_kernel_write); |