Commit | Line | Data |
---|---|---|
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 | ||
48c9d417 TI |
53 | static int snd_rawmidi_free(struct snd_rawmidi *rawmidi); |
54 | static int snd_rawmidi_dev_free(struct snd_device *device); | |
55 | static int snd_rawmidi_dev_register(struct snd_device *device); | |
56 | static int snd_rawmidi_dev_disconnect(struct snd_device *device); | |
57 | static int snd_rawmidi_dev_unregister(struct snd_device *device); | |
1da177e4 | 58 | |
f87135f5 | 59 | static LIST_HEAD(snd_rawmidi_devices); |
1da177e4 LT |
60 | static DECLARE_MUTEX(register_mutex); |
61 | ||
f87135f5 CL |
62 | static struct snd_rawmidi *snd_rawmidi_search(struct snd_card *card, int device) |
63 | { | |
64 | struct list_head *p; | |
65 | struct snd_rawmidi *rawmidi; | |
66 | ||
67 | list_for_each(p, &snd_rawmidi_devices) { | |
68 | rawmidi = list_entry(p, struct snd_rawmidi, list); | |
69 | if (rawmidi->card == card && rawmidi->device == device) | |
70 | return rawmidi; | |
71 | } | |
72 | return NULL; | |
73 | } | |
74 | ||
1da177e4 LT |
75 | static inline unsigned short snd_rawmidi_file_flags(struct file *file) |
76 | { | |
77 | switch (file->f_mode & (FMODE_READ | FMODE_WRITE)) { | |
78 | case FMODE_WRITE: | |
79 | return SNDRV_RAWMIDI_LFLG_OUTPUT; | |
80 | case FMODE_READ: | |
81 | return SNDRV_RAWMIDI_LFLG_INPUT; | |
82 | default: | |
83 | return SNDRV_RAWMIDI_LFLG_OPEN; | |
84 | } | |
85 | } | |
86 | ||
48c9d417 | 87 | static inline int snd_rawmidi_ready(struct snd_rawmidi_substream *substream) |
1da177e4 | 88 | { |
48c9d417 | 89 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
1da177e4 LT |
90 | return runtime->avail >= runtime->avail_min; |
91 | } | |
92 | ||
48c9d417 TI |
93 | static inline int snd_rawmidi_ready_append(struct snd_rawmidi_substream *substream, |
94 | size_t count) | |
1da177e4 | 95 | { |
48c9d417 | 96 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
1da177e4 LT |
97 | return runtime->avail >= runtime->avail_min && |
98 | (!substream->append || runtime->avail >= count); | |
99 | } | |
100 | ||
101 | static void snd_rawmidi_input_event_tasklet(unsigned long data) | |
102 | { | |
48c9d417 | 103 | struct snd_rawmidi_substream *substream = (struct snd_rawmidi_substream *)data; |
1da177e4 LT |
104 | substream->runtime->event(substream); |
105 | } | |
106 | ||
107 | static void snd_rawmidi_output_trigger_tasklet(unsigned long data) | |
108 | { | |
48c9d417 | 109 | struct snd_rawmidi_substream *substream = (struct snd_rawmidi_substream *)data; |
1da177e4 LT |
110 | substream->ops->trigger(substream, 1); |
111 | } | |
112 | ||
48c9d417 | 113 | static int snd_rawmidi_runtime_create(struct snd_rawmidi_substream *substream) |
1da177e4 | 114 | { |
48c9d417 | 115 | struct snd_rawmidi_runtime *runtime; |
1da177e4 | 116 | |
ca2c0966 | 117 | if ((runtime = kzalloc(sizeof(*runtime), GFP_KERNEL)) == NULL) |
1da177e4 LT |
118 | return -ENOMEM; |
119 | spin_lock_init(&runtime->lock); | |
120 | init_waitqueue_head(&runtime->sleep); | |
121 | if (substream->stream == SNDRV_RAWMIDI_STREAM_INPUT) | |
122 | tasklet_init(&runtime->tasklet, | |
123 | snd_rawmidi_input_event_tasklet, | |
124 | (unsigned long)substream); | |
125 | else | |
126 | tasklet_init(&runtime->tasklet, | |
127 | snd_rawmidi_output_trigger_tasklet, | |
128 | (unsigned long)substream); | |
129 | runtime->event = NULL; | |
130 | runtime->buffer_size = PAGE_SIZE; | |
131 | runtime->avail_min = 1; | |
132 | if (substream->stream == SNDRV_RAWMIDI_STREAM_INPUT) | |
133 | runtime->avail = 0; | |
134 | else | |
135 | runtime->avail = runtime->buffer_size; | |
136 | if ((runtime->buffer = kmalloc(runtime->buffer_size, GFP_KERNEL)) == NULL) { | |
137 | kfree(runtime); | |
138 | return -ENOMEM; | |
139 | } | |
140 | runtime->appl_ptr = runtime->hw_ptr = 0; | |
141 | substream->runtime = runtime; | |
142 | return 0; | |
143 | } | |
144 | ||
48c9d417 | 145 | static int snd_rawmidi_runtime_free(struct snd_rawmidi_substream *substream) |
1da177e4 | 146 | { |
48c9d417 | 147 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
1da177e4 LT |
148 | |
149 | kfree(runtime->buffer); | |
150 | kfree(runtime); | |
151 | substream->runtime = NULL; | |
152 | return 0; | |
153 | } | |
154 | ||
48c9d417 | 155 | static inline void snd_rawmidi_output_trigger(struct snd_rawmidi_substream *substream,int up) |
1da177e4 LT |
156 | { |
157 | if (up) { | |
158 | tasklet_hi_schedule(&substream->runtime->tasklet); | |
159 | } else { | |
160 | tasklet_kill(&substream->runtime->tasklet); | |
161 | substream->ops->trigger(substream, 0); | |
162 | } | |
163 | } | |
164 | ||
48c9d417 | 165 | static void snd_rawmidi_input_trigger(struct snd_rawmidi_substream *substream, int up) |
1da177e4 LT |
166 | { |
167 | substream->ops->trigger(substream, up); | |
168 | if (!up && substream->runtime->event) | |
169 | tasklet_kill(&substream->runtime->tasklet); | |
170 | } | |
171 | ||
48c9d417 | 172 | int snd_rawmidi_drop_output(struct snd_rawmidi_substream *substream) |
1da177e4 LT |
173 | { |
174 | unsigned long flags; | |
48c9d417 | 175 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
1da177e4 LT |
176 | |
177 | snd_rawmidi_output_trigger(substream, 0); | |
178 | runtime->drain = 0; | |
179 | spin_lock_irqsave(&runtime->lock, flags); | |
180 | runtime->appl_ptr = runtime->hw_ptr = 0; | |
181 | runtime->avail = runtime->buffer_size; | |
182 | spin_unlock_irqrestore(&runtime->lock, flags); | |
183 | return 0; | |
184 | } | |
185 | ||
48c9d417 | 186 | int snd_rawmidi_drain_output(struct snd_rawmidi_substream *substream) |
1da177e4 LT |
187 | { |
188 | int err; | |
189 | long timeout; | |
48c9d417 | 190 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
1da177e4 LT |
191 | |
192 | err = 0; | |
193 | runtime->drain = 1; | |
194 | timeout = wait_event_interruptible_timeout(runtime->sleep, | |
195 | (runtime->avail >= runtime->buffer_size), | |
196 | 10*HZ); | |
197 | if (signal_pending(current)) | |
198 | err = -ERESTARTSYS; | |
199 | if (runtime->avail < runtime->buffer_size && !timeout) { | |
200 | snd_printk(KERN_WARNING "rawmidi drain error (avail = %li, buffer_size = %li)\n", (long)runtime->avail, (long)runtime->buffer_size); | |
201 | err = -EIO; | |
202 | } | |
203 | runtime->drain = 0; | |
204 | if (err != -ERESTARTSYS) { | |
205 | /* we need wait a while to make sure that Tx FIFOs are empty */ | |
206 | if (substream->ops->drain) | |
207 | substream->ops->drain(substream); | |
208 | else | |
209 | msleep(50); | |
210 | snd_rawmidi_drop_output(substream); | |
211 | } | |
212 | return err; | |
213 | } | |
214 | ||
48c9d417 | 215 | int snd_rawmidi_drain_input(struct snd_rawmidi_substream *substream) |
1da177e4 LT |
216 | { |
217 | unsigned long flags; | |
48c9d417 | 218 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
1da177e4 LT |
219 | |
220 | snd_rawmidi_input_trigger(substream, 0); | |
221 | runtime->drain = 0; | |
222 | spin_lock_irqsave(&runtime->lock, flags); | |
223 | runtime->appl_ptr = runtime->hw_ptr = 0; | |
224 | runtime->avail = 0; | |
225 | spin_unlock_irqrestore(&runtime->lock, flags); | |
226 | return 0; | |
227 | } | |
228 | ||
f87135f5 | 229 | int snd_rawmidi_kernel_open(struct snd_card *card, int device, int subdevice, |
48c9d417 | 230 | int mode, struct snd_rawmidi_file * rfile) |
1da177e4 | 231 | { |
48c9d417 | 232 | struct snd_rawmidi *rmidi; |
1da177e4 | 233 | struct list_head *list1, *list2; |
48c9d417 TI |
234 | struct snd_rawmidi_substream *sinput = NULL, *soutput = NULL; |
235 | struct snd_rawmidi_runtime *input = NULL, *output = NULL; | |
1da177e4 LT |
236 | int err; |
237 | ||
238 | if (rfile) | |
239 | rfile->input = rfile->output = NULL; | |
f87135f5 CL |
240 | down(®ister_mutex); |
241 | rmidi = snd_rawmidi_search(card, device); | |
242 | up(®ister_mutex); | |
1da177e4 LT |
243 | if (rmidi == NULL) { |
244 | err = -ENODEV; | |
245 | goto __error1; | |
246 | } | |
247 | if (!try_module_get(rmidi->card->module)) { | |
248 | err = -EFAULT; | |
249 | goto __error1; | |
250 | } | |
251 | if (!(mode & SNDRV_RAWMIDI_LFLG_NOOPENLOCK)) | |
252 | down(&rmidi->open_mutex); | |
253 | if (mode & SNDRV_RAWMIDI_LFLG_INPUT) { | |
254 | if (!(rmidi->info_flags & SNDRV_RAWMIDI_INFO_INPUT)) { | |
255 | err = -ENXIO; | |
256 | goto __error; | |
257 | } | |
258 | if (subdevice >= 0 && (unsigned int)subdevice >= rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substream_count) { | |
259 | err = -ENODEV; | |
260 | goto __error; | |
261 | } | |
262 | if (rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substream_opened >= | |
263 | rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substream_count) { | |
264 | err = -EAGAIN; | |
265 | goto __error; | |
266 | } | |
267 | } | |
268 | if (mode & SNDRV_RAWMIDI_LFLG_OUTPUT) { | |
269 | if (!(rmidi->info_flags & SNDRV_RAWMIDI_INFO_OUTPUT)) { | |
270 | err = -ENXIO; | |
271 | goto __error; | |
272 | } | |
273 | if (subdevice >= 0 && (unsigned int)subdevice >= rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substream_count) { | |
274 | err = -ENODEV; | |
275 | goto __error; | |
276 | } | |
277 | if (rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substream_opened >= | |
278 | rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substream_count) { | |
279 | err = -EAGAIN; | |
280 | goto __error; | |
281 | } | |
282 | } | |
283 | list1 = rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substreams.next; | |
284 | while (1) { | |
285 | if (list1 == &rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substreams) { | |
286 | sinput = NULL; | |
287 | if (mode & SNDRV_RAWMIDI_LFLG_INPUT) { | |
288 | err = -EAGAIN; | |
289 | goto __error; | |
290 | } | |
291 | break; | |
292 | } | |
48c9d417 | 293 | sinput = list_entry(list1, struct snd_rawmidi_substream, list); |
1da177e4 LT |
294 | if ((mode & SNDRV_RAWMIDI_LFLG_INPUT) && sinput->opened) |
295 | goto __nexti; | |
296 | if (subdevice < 0 || (subdevice >= 0 && subdevice == sinput->number)) | |
297 | break; | |
298 | __nexti: | |
299 | list1 = list1->next; | |
300 | } | |
301 | list2 = rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substreams.next; | |
302 | while (1) { | |
303 | if (list2 == &rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substreams) { | |
304 | soutput = NULL; | |
305 | if (mode & SNDRV_RAWMIDI_LFLG_OUTPUT) { | |
306 | err = -EAGAIN; | |
307 | goto __error; | |
308 | } | |
309 | break; | |
310 | } | |
48c9d417 | 311 | soutput = list_entry(list2, struct snd_rawmidi_substream, list); |
1da177e4 LT |
312 | if (mode & SNDRV_RAWMIDI_LFLG_OUTPUT) { |
313 | if (mode & SNDRV_RAWMIDI_LFLG_APPEND) { | |
314 | if (soutput->opened && !soutput->append) | |
315 | goto __nexto; | |
316 | } else { | |
317 | if (soutput->opened) | |
318 | goto __nexto; | |
319 | } | |
320 | } | |
321 | if (subdevice < 0 || (subdevice >= 0 && subdevice == soutput->number)) | |
322 | break; | |
323 | __nexto: | |
324 | list2 = list2->next; | |
325 | } | |
326 | if (mode & SNDRV_RAWMIDI_LFLG_INPUT) { | |
327 | if ((err = snd_rawmidi_runtime_create(sinput)) < 0) | |
328 | goto __error; | |
329 | input = sinput->runtime; | |
330 | if ((err = sinput->ops->open(sinput)) < 0) | |
331 | goto __error; | |
332 | sinput->opened = 1; | |
333 | rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substream_opened++; | |
334 | } else { | |
335 | sinput = NULL; | |
336 | } | |
337 | if (mode & SNDRV_RAWMIDI_LFLG_OUTPUT) { | |
338 | if (soutput->opened) | |
339 | goto __skip_output; | |
340 | if ((err = snd_rawmidi_runtime_create(soutput)) < 0) { | |
341 | if (mode & SNDRV_RAWMIDI_LFLG_INPUT) | |
342 | sinput->ops->close(sinput); | |
343 | goto __error; | |
344 | } | |
345 | output = soutput->runtime; | |
346 | if ((err = soutput->ops->open(soutput)) < 0) { | |
347 | if (mode & SNDRV_RAWMIDI_LFLG_INPUT) | |
348 | sinput->ops->close(sinput); | |
349 | goto __error; | |
350 | } | |
351 | __skip_output: | |
352 | soutput->opened = 1; | |
353 | if (mode & SNDRV_RAWMIDI_LFLG_APPEND) | |
354 | soutput->append = 1; | |
355 | if (soutput->use_count++ == 0) | |
356 | soutput->active_sensing = 1; | |
357 | rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substream_opened++; | |
358 | } else { | |
359 | soutput = NULL; | |
360 | } | |
361 | if (!(mode & SNDRV_RAWMIDI_LFLG_NOOPENLOCK)) | |
362 | up(&rmidi->open_mutex); | |
363 | if (rfile) { | |
364 | rfile->rmidi = rmidi; | |
365 | rfile->input = sinput; | |
366 | rfile->output = soutput; | |
367 | } | |
368 | return 0; | |
369 | ||
370 | __error: | |
371 | if (input != NULL) | |
372 | snd_rawmidi_runtime_free(sinput); | |
373 | if (output != NULL) | |
374 | snd_rawmidi_runtime_free(soutput); | |
375 | module_put(rmidi->card->module); | |
376 | if (!(mode & SNDRV_RAWMIDI_LFLG_NOOPENLOCK)) | |
377 | up(&rmidi->open_mutex); | |
378 | __error1: | |
379 | return err; | |
380 | } | |
381 | ||
382 | static int snd_rawmidi_open(struct inode *inode, struct file *file) | |
383 | { | |
384 | int maj = imajor(inode); | |
48c9d417 | 385 | struct snd_card *card; |
f87135f5 | 386 | int subdevice; |
1da177e4 LT |
387 | unsigned short fflags; |
388 | int err; | |
48c9d417 TI |
389 | struct snd_rawmidi *rmidi; |
390 | struct snd_rawmidi_file *rawmidi_file; | |
1da177e4 LT |
391 | wait_queue_t wait; |
392 | struct list_head *list; | |
48c9d417 | 393 | struct snd_ctl_file *kctl; |
1da177e4 | 394 | |
f1902860 | 395 | if (maj == snd_major) { |
f87135f5 CL |
396 | rmidi = snd_lookup_minor_data(iminor(inode), |
397 | SNDRV_DEVICE_TYPE_RAWMIDI); | |
1da177e4 | 398 | #ifdef CONFIG_SND_OSSEMUL |
f1902860 | 399 | } else if (maj == SOUND_MAJOR) { |
f87135f5 CL |
400 | rmidi = snd_lookup_oss_minor_data(iminor(inode), |
401 | SNDRV_OSS_DEVICE_TYPE_MIDI); | |
1da177e4 | 402 | #endif |
f1902860 | 403 | } else |
1da177e4 | 404 | return -ENXIO; |
1da177e4 | 405 | |
1da177e4 LT |
406 | if (rmidi == NULL) |
407 | return -ENODEV; | |
1da177e4 LT |
408 | if ((file->f_flags & O_APPEND) && !(file->f_flags & O_NONBLOCK)) |
409 | return -EINVAL; /* invalid combination */ | |
410 | card = rmidi->card; | |
411 | err = snd_card_file_add(card, file); | |
412 | if (err < 0) | |
413 | return -ENODEV; | |
414 | fflags = snd_rawmidi_file_flags(file); | |
f1902860 | 415 | if ((file->f_flags & O_APPEND) || maj == SOUND_MAJOR) /* OSS emul? */ |
1da177e4 LT |
416 | fflags |= SNDRV_RAWMIDI_LFLG_APPEND; |
417 | fflags |= SNDRV_RAWMIDI_LFLG_NOOPENLOCK; | |
418 | rawmidi_file = kmalloc(sizeof(*rawmidi_file), GFP_KERNEL); | |
419 | if (rawmidi_file == NULL) { | |
420 | snd_card_file_remove(card, file); | |
421 | return -ENOMEM; | |
422 | } | |
423 | init_waitqueue_entry(&wait, current); | |
424 | add_wait_queue(&rmidi->open_wait, &wait); | |
425 | down(&rmidi->open_mutex); | |
426 | while (1) { | |
427 | subdevice = -1; | |
428 | down_read(&card->controls_rwsem); | |
429 | list_for_each(list, &card->ctl_files) { | |
430 | kctl = snd_ctl_file(list); | |
431 | if (kctl->pid == current->pid) { | |
432 | subdevice = kctl->prefer_rawmidi_subdevice; | |
433 | break; | |
434 | } | |
435 | } | |
436 | up_read(&card->controls_rwsem); | |
f87135f5 CL |
437 | err = snd_rawmidi_kernel_open(rmidi->card, rmidi->device, |
438 | subdevice, fflags, rawmidi_file); | |
1da177e4 LT |
439 | if (err >= 0) |
440 | break; | |
441 | if (err == -EAGAIN) { | |
442 | if (file->f_flags & O_NONBLOCK) { | |
443 | err = -EBUSY; | |
444 | break; | |
445 | } | |
446 | } else | |
447 | break; | |
448 | set_current_state(TASK_INTERRUPTIBLE); | |
449 | up(&rmidi->open_mutex); | |
450 | schedule(); | |
451 | down(&rmidi->open_mutex); | |
452 | if (signal_pending(current)) { | |
453 | err = -ERESTARTSYS; | |
454 | break; | |
455 | } | |
456 | } | |
457 | #ifdef CONFIG_SND_OSSEMUL | |
458 | if (rawmidi_file->input && rawmidi_file->input->runtime) | |
459 | rawmidi_file->input->runtime->oss = (maj == SOUND_MAJOR); | |
460 | if (rawmidi_file->output && rawmidi_file->output->runtime) | |
461 | rawmidi_file->output->runtime->oss = (maj == SOUND_MAJOR); | |
462 | #endif | |
463 | remove_wait_queue(&rmidi->open_wait, &wait); | |
464 | if (err >= 0) { | |
465 | file->private_data = rawmidi_file; | |
466 | } else { | |
467 | snd_card_file_remove(card, file); | |
468 | kfree(rawmidi_file); | |
469 | } | |
470 | up(&rmidi->open_mutex); | |
471 | return err; | |
472 | } | |
473 | ||
48c9d417 | 474 | int snd_rawmidi_kernel_release(struct snd_rawmidi_file * rfile) |
1da177e4 | 475 | { |
48c9d417 TI |
476 | struct snd_rawmidi *rmidi; |
477 | struct snd_rawmidi_substream *substream; | |
478 | struct snd_rawmidi_runtime *runtime; | |
1da177e4 LT |
479 | |
480 | snd_assert(rfile != NULL, return -ENXIO); | |
481 | snd_assert(rfile->input != NULL || rfile->output != NULL, return -ENXIO); | |
482 | rmidi = rfile->rmidi; | |
483 | down(&rmidi->open_mutex); | |
484 | if (rfile->input != NULL) { | |
485 | substream = rfile->input; | |
486 | rfile->input = NULL; | |
487 | runtime = substream->runtime; | |
488 | snd_rawmidi_input_trigger(substream, 0); | |
489 | substream->ops->close(substream); | |
490 | if (runtime->private_free != NULL) | |
491 | runtime->private_free(substream); | |
492 | snd_rawmidi_runtime_free(substream); | |
493 | substream->opened = 0; | |
494 | rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substream_opened--; | |
495 | } | |
496 | if (rfile->output != NULL) { | |
497 | substream = rfile->output; | |
498 | rfile->output = NULL; | |
499 | if (--substream->use_count == 0) { | |
500 | runtime = substream->runtime; | |
501 | if (substream->active_sensing) { | |
502 | unsigned char buf = 0xfe; | |
503 | /* sending single active sensing message to shut the device up */ | |
504 | snd_rawmidi_kernel_write(substream, &buf, 1); | |
505 | } | |
506 | if (snd_rawmidi_drain_output(substream) == -ERESTARTSYS) | |
507 | snd_rawmidi_output_trigger(substream, 0); | |
508 | substream->ops->close(substream); | |
509 | if (runtime->private_free != NULL) | |
510 | runtime->private_free(substream); | |
511 | snd_rawmidi_runtime_free(substream); | |
512 | substream->opened = 0; | |
513 | substream->append = 0; | |
514 | } | |
515 | rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substream_opened--; | |
516 | } | |
517 | up(&rmidi->open_mutex); | |
518 | module_put(rmidi->card->module); | |
519 | return 0; | |
520 | } | |
521 | ||
522 | static int snd_rawmidi_release(struct inode *inode, struct file *file) | |
523 | { | |
48c9d417 TI |
524 | struct snd_rawmidi_file *rfile; |
525 | struct snd_rawmidi *rmidi; | |
1da177e4 LT |
526 | int err; |
527 | ||
528 | rfile = file->private_data; | |
529 | err = snd_rawmidi_kernel_release(rfile); | |
530 | rmidi = rfile->rmidi; | |
531 | wake_up(&rmidi->open_wait); | |
532 | kfree(rfile); | |
533 | snd_card_file_remove(rmidi->card, file); | |
534 | return err; | |
535 | } | |
536 | ||
18612048 AB |
537 | static int snd_rawmidi_info(struct snd_rawmidi_substream *substream, |
538 | struct snd_rawmidi_info *info) | |
1da177e4 | 539 | { |
48c9d417 | 540 | struct snd_rawmidi *rmidi; |
1da177e4 LT |
541 | |
542 | if (substream == NULL) | |
543 | return -ENODEV; | |
544 | rmidi = substream->rmidi; | |
545 | memset(info, 0, sizeof(*info)); | |
546 | info->card = rmidi->card->number; | |
547 | info->device = rmidi->device; | |
548 | info->subdevice = substream->number; | |
549 | info->stream = substream->stream; | |
550 | info->flags = rmidi->info_flags; | |
551 | strcpy(info->id, rmidi->id); | |
552 | strcpy(info->name, rmidi->name); | |
553 | strcpy(info->subname, substream->name); | |
554 | info->subdevices_count = substream->pstr->substream_count; | |
555 | info->subdevices_avail = (substream->pstr->substream_count - | |
556 | substream->pstr->substream_opened); | |
557 | return 0; | |
558 | } | |
559 | ||
48c9d417 TI |
560 | static int snd_rawmidi_info_user(struct snd_rawmidi_substream *substream, |
561 | struct snd_rawmidi_info __user * _info) | |
1da177e4 | 562 | { |
48c9d417 | 563 | struct snd_rawmidi_info info; |
1da177e4 LT |
564 | int err; |
565 | if ((err = snd_rawmidi_info(substream, &info)) < 0) | |
566 | return err; | |
48c9d417 | 567 | if (copy_to_user(_info, &info, sizeof(struct snd_rawmidi_info))) |
1da177e4 LT |
568 | return -EFAULT; |
569 | return 0; | |
570 | } | |
571 | ||
48c9d417 | 572 | int snd_rawmidi_info_select(struct snd_card *card, struct snd_rawmidi_info *info) |
1da177e4 | 573 | { |
48c9d417 TI |
574 | struct snd_rawmidi *rmidi; |
575 | struct snd_rawmidi_str *pstr; | |
576 | struct snd_rawmidi_substream *substream; | |
1da177e4 | 577 | struct list_head *list; |
f87135f5 CL |
578 | |
579 | down(®ister_mutex); | |
580 | rmidi = snd_rawmidi_search(card, info->device); | |
581 | up(®ister_mutex); | |
a106cd3d CL |
582 | if (!rmidi) |
583 | return -ENXIO; | |
1da177e4 LT |
584 | if (info->stream < 0 || info->stream > 1) |
585 | return -EINVAL; | |
586 | pstr = &rmidi->streams[info->stream]; | |
587 | if (pstr->substream_count == 0) | |
588 | return -ENOENT; | |
589 | if (info->subdevice >= pstr->substream_count) | |
590 | return -ENXIO; | |
591 | list_for_each(list, &pstr->substreams) { | |
48c9d417 | 592 | substream = list_entry(list, struct snd_rawmidi_substream, list); |
1da177e4 LT |
593 | if ((unsigned int)substream->number == info->subdevice) |
594 | return snd_rawmidi_info(substream, info); | |
595 | } | |
596 | return -ENXIO; | |
597 | } | |
598 | ||
48c9d417 TI |
599 | static int snd_rawmidi_info_select_user(struct snd_card *card, |
600 | struct snd_rawmidi_info __user *_info) | |
1da177e4 LT |
601 | { |
602 | int err; | |
48c9d417 | 603 | struct snd_rawmidi_info info; |
1da177e4 LT |
604 | if (get_user(info.device, &_info->device)) |
605 | return -EFAULT; | |
606 | if (get_user(info.stream, &_info->stream)) | |
607 | return -EFAULT; | |
608 | if (get_user(info.subdevice, &_info->subdevice)) | |
609 | return -EFAULT; | |
610 | if ((err = snd_rawmidi_info_select(card, &info)) < 0) | |
611 | return err; | |
48c9d417 | 612 | if (copy_to_user(_info, &info, sizeof(struct snd_rawmidi_info))) |
1da177e4 LT |
613 | return -EFAULT; |
614 | return 0; | |
615 | } | |
616 | ||
48c9d417 TI |
617 | int snd_rawmidi_output_params(struct snd_rawmidi_substream *substream, |
618 | struct snd_rawmidi_params * params) | |
1da177e4 LT |
619 | { |
620 | char *newbuf; | |
48c9d417 | 621 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
1da177e4 LT |
622 | |
623 | if (substream->append && substream->use_count > 1) | |
624 | return -EBUSY; | |
625 | snd_rawmidi_drain_output(substream); | |
626 | if (params->buffer_size < 32 || params->buffer_size > 1024L * 1024L) { | |
627 | return -EINVAL; | |
628 | } | |
629 | if (params->avail_min < 1 || params->avail_min > params->buffer_size) { | |
630 | return -EINVAL; | |
631 | } | |
632 | if (params->buffer_size != runtime->buffer_size) { | |
633 | if ((newbuf = (char *) kmalloc(params->buffer_size, GFP_KERNEL)) == NULL) | |
634 | return -ENOMEM; | |
635 | kfree(runtime->buffer); | |
636 | runtime->buffer = newbuf; | |
637 | runtime->buffer_size = params->buffer_size; | |
1b98ea47 | 638 | runtime->avail = runtime->buffer_size; |
1da177e4 LT |
639 | } |
640 | runtime->avail_min = params->avail_min; | |
641 | substream->active_sensing = !params->no_active_sensing; | |
642 | return 0; | |
643 | } | |
644 | ||
48c9d417 TI |
645 | int snd_rawmidi_input_params(struct snd_rawmidi_substream *substream, |
646 | struct snd_rawmidi_params * params) | |
1da177e4 LT |
647 | { |
648 | char *newbuf; | |
48c9d417 | 649 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
1da177e4 LT |
650 | |
651 | snd_rawmidi_drain_input(substream); | |
652 | if (params->buffer_size < 32 || params->buffer_size > 1024L * 1024L) { | |
653 | return -EINVAL; | |
654 | } | |
655 | if (params->avail_min < 1 || params->avail_min > params->buffer_size) { | |
656 | return -EINVAL; | |
657 | } | |
658 | if (params->buffer_size != runtime->buffer_size) { | |
659 | if ((newbuf = (char *) kmalloc(params->buffer_size, GFP_KERNEL)) == NULL) | |
660 | return -ENOMEM; | |
661 | kfree(runtime->buffer); | |
662 | runtime->buffer = newbuf; | |
663 | runtime->buffer_size = params->buffer_size; | |
664 | } | |
665 | runtime->avail_min = params->avail_min; | |
666 | return 0; | |
667 | } | |
668 | ||
48c9d417 TI |
669 | static int snd_rawmidi_output_status(struct snd_rawmidi_substream *substream, |
670 | struct snd_rawmidi_status * status) | |
1da177e4 | 671 | { |
48c9d417 | 672 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
1da177e4 LT |
673 | |
674 | memset(status, 0, sizeof(*status)); | |
675 | status->stream = SNDRV_RAWMIDI_STREAM_OUTPUT; | |
676 | spin_lock_irq(&runtime->lock); | |
677 | status->avail = runtime->avail; | |
678 | spin_unlock_irq(&runtime->lock); | |
679 | return 0; | |
680 | } | |
681 | ||
48c9d417 TI |
682 | static int snd_rawmidi_input_status(struct snd_rawmidi_substream *substream, |
683 | struct snd_rawmidi_status * status) | |
1da177e4 | 684 | { |
48c9d417 | 685 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
1da177e4 LT |
686 | |
687 | memset(status, 0, sizeof(*status)); | |
688 | status->stream = SNDRV_RAWMIDI_STREAM_INPUT; | |
689 | spin_lock_irq(&runtime->lock); | |
690 | status->avail = runtime->avail; | |
691 | status->xruns = runtime->xruns; | |
692 | runtime->xruns = 0; | |
693 | spin_unlock_irq(&runtime->lock); | |
694 | return 0; | |
695 | } | |
696 | ||
697 | static long snd_rawmidi_ioctl(struct file *file, unsigned int cmd, unsigned long arg) | |
698 | { | |
48c9d417 | 699 | struct snd_rawmidi_file *rfile; |
1da177e4 LT |
700 | void __user *argp = (void __user *)arg; |
701 | ||
702 | rfile = file->private_data; | |
703 | if (((cmd >> 8) & 0xff) != 'W') | |
704 | return -ENOTTY; | |
705 | switch (cmd) { | |
706 | case SNDRV_RAWMIDI_IOCTL_PVERSION: | |
707 | return put_user(SNDRV_RAWMIDI_VERSION, (int __user *)argp) ? -EFAULT : 0; | |
708 | case SNDRV_RAWMIDI_IOCTL_INFO: | |
709 | { | |
48c9d417 TI |
710 | int stream; |
711 | struct snd_rawmidi_info __user *info = argp; | |
1da177e4 LT |
712 | if (get_user(stream, &info->stream)) |
713 | return -EFAULT; | |
714 | switch (stream) { | |
715 | case SNDRV_RAWMIDI_STREAM_INPUT: | |
716 | return snd_rawmidi_info_user(rfile->input, info); | |
717 | case SNDRV_RAWMIDI_STREAM_OUTPUT: | |
718 | return snd_rawmidi_info_user(rfile->output, info); | |
719 | default: | |
720 | return -EINVAL; | |
721 | } | |
722 | } | |
723 | case SNDRV_RAWMIDI_IOCTL_PARAMS: | |
724 | { | |
48c9d417 TI |
725 | struct snd_rawmidi_params params; |
726 | if (copy_from_user(¶ms, argp, sizeof(struct snd_rawmidi_params))) | |
1da177e4 LT |
727 | return -EFAULT; |
728 | switch (params.stream) { | |
729 | case SNDRV_RAWMIDI_STREAM_OUTPUT: | |
730 | if (rfile->output == NULL) | |
731 | return -EINVAL; | |
732 | return snd_rawmidi_output_params(rfile->output, ¶ms); | |
733 | case SNDRV_RAWMIDI_STREAM_INPUT: | |
734 | if (rfile->input == NULL) | |
735 | return -EINVAL; | |
736 | return snd_rawmidi_input_params(rfile->input, ¶ms); | |
737 | default: | |
738 | return -EINVAL; | |
739 | } | |
740 | } | |
741 | case SNDRV_RAWMIDI_IOCTL_STATUS: | |
742 | { | |
743 | int err = 0; | |
48c9d417 TI |
744 | struct snd_rawmidi_status status; |
745 | if (copy_from_user(&status, argp, sizeof(struct snd_rawmidi_status))) | |
1da177e4 LT |
746 | return -EFAULT; |
747 | switch (status.stream) { | |
748 | case SNDRV_RAWMIDI_STREAM_OUTPUT: | |
749 | if (rfile->output == NULL) | |
750 | return -EINVAL; | |
751 | err = snd_rawmidi_output_status(rfile->output, &status); | |
752 | break; | |
753 | case SNDRV_RAWMIDI_STREAM_INPUT: | |
754 | if (rfile->input == NULL) | |
755 | return -EINVAL; | |
756 | err = snd_rawmidi_input_status(rfile->input, &status); | |
757 | break; | |
758 | default: | |
759 | return -EINVAL; | |
760 | } | |
761 | if (err < 0) | |
762 | return err; | |
48c9d417 | 763 | if (copy_to_user(argp, &status, sizeof(struct snd_rawmidi_status))) |
1da177e4 LT |
764 | return -EFAULT; |
765 | return 0; | |
766 | } | |
767 | case SNDRV_RAWMIDI_IOCTL_DROP: | |
768 | { | |
769 | int val; | |
770 | if (get_user(val, (int __user *) argp)) | |
771 | return -EFAULT; | |
772 | switch (val) { | |
773 | case SNDRV_RAWMIDI_STREAM_OUTPUT: | |
774 | if (rfile->output == NULL) | |
775 | return -EINVAL; | |
776 | return snd_rawmidi_drop_output(rfile->output); | |
777 | default: | |
778 | return -EINVAL; | |
779 | } | |
780 | } | |
781 | case SNDRV_RAWMIDI_IOCTL_DRAIN: | |
782 | { | |
783 | int val; | |
784 | if (get_user(val, (int __user *) argp)) | |
785 | return -EFAULT; | |
786 | switch (val) { | |
787 | case SNDRV_RAWMIDI_STREAM_OUTPUT: | |
788 | if (rfile->output == NULL) | |
789 | return -EINVAL; | |
790 | return snd_rawmidi_drain_output(rfile->output); | |
791 | case SNDRV_RAWMIDI_STREAM_INPUT: | |
792 | if (rfile->input == NULL) | |
793 | return -EINVAL; | |
794 | return snd_rawmidi_drain_input(rfile->input); | |
795 | default: | |
796 | return -EINVAL; | |
797 | } | |
798 | } | |
799 | #ifdef CONFIG_SND_DEBUG | |
800 | default: | |
801 | snd_printk(KERN_WARNING "rawmidi: unknown command = 0x%x\n", cmd); | |
802 | #endif | |
803 | } | |
804 | return -ENOTTY; | |
805 | } | |
806 | ||
48c9d417 TI |
807 | static int snd_rawmidi_control_ioctl(struct snd_card *card, |
808 | struct snd_ctl_file *control, | |
1da177e4 LT |
809 | unsigned int cmd, |
810 | unsigned long arg) | |
811 | { | |
812 | void __user *argp = (void __user *)arg; | |
1da177e4 | 813 | |
1da177e4 LT |
814 | switch (cmd) { |
815 | case SNDRV_CTL_IOCTL_RAWMIDI_NEXT_DEVICE: | |
816 | { | |
817 | int device; | |
818 | ||
819 | if (get_user(device, (int __user *)argp)) | |
820 | return -EFAULT; | |
f87135f5 | 821 | down(®ister_mutex); |
1da177e4 LT |
822 | device = device < 0 ? 0 : device + 1; |
823 | while (device < SNDRV_RAWMIDI_DEVICES) { | |
f87135f5 | 824 | if (snd_rawmidi_search(card, device)) |
1da177e4 LT |
825 | break; |
826 | device++; | |
827 | } | |
828 | if (device == SNDRV_RAWMIDI_DEVICES) | |
829 | device = -1; | |
f87135f5 | 830 | up(®ister_mutex); |
1da177e4 LT |
831 | if (put_user(device, (int __user *)argp)) |
832 | return -EFAULT; | |
833 | return 0; | |
834 | } | |
835 | case SNDRV_CTL_IOCTL_RAWMIDI_PREFER_SUBDEVICE: | |
836 | { | |
837 | int val; | |
838 | ||
839 | if (get_user(val, (int __user *)argp)) | |
840 | return -EFAULT; | |
841 | control->prefer_rawmidi_subdevice = val; | |
842 | return 0; | |
843 | } | |
844 | case SNDRV_CTL_IOCTL_RAWMIDI_INFO: | |
845 | return snd_rawmidi_info_select_user(card, argp); | |
846 | } | |
847 | return -ENOIOCTLCMD; | |
848 | } | |
849 | ||
850 | /** | |
851 | * snd_rawmidi_receive - receive the input data from the device | |
852 | * @substream: the rawmidi substream | |
853 | * @buffer: the buffer pointer | |
854 | * @count: the data size to read | |
855 | * | |
856 | * Reads the data from the internal buffer. | |
857 | * | |
858 | * Returns the size of read data, or a negative error code on failure. | |
859 | */ | |
48c9d417 TI |
860 | int snd_rawmidi_receive(struct snd_rawmidi_substream *substream, |
861 | const unsigned char *buffer, int count) | |
1da177e4 LT |
862 | { |
863 | unsigned long flags; | |
864 | int result = 0, count1; | |
48c9d417 | 865 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
1da177e4 LT |
866 | |
867 | if (runtime->buffer == NULL) { | |
868 | snd_printd("snd_rawmidi_receive: input is not active!!!\n"); | |
869 | return -EINVAL; | |
870 | } | |
871 | spin_lock_irqsave(&runtime->lock, flags); | |
872 | if (count == 1) { /* special case, faster code */ | |
873 | substream->bytes++; | |
874 | if (runtime->avail < runtime->buffer_size) { | |
875 | runtime->buffer[runtime->hw_ptr++] = buffer[0]; | |
876 | runtime->hw_ptr %= runtime->buffer_size; | |
877 | runtime->avail++; | |
878 | result++; | |
879 | } else { | |
880 | runtime->xruns++; | |
881 | } | |
882 | } else { | |
883 | substream->bytes += count; | |
884 | count1 = runtime->buffer_size - runtime->hw_ptr; | |
885 | if (count1 > count) | |
886 | count1 = count; | |
887 | if (count1 > (int)(runtime->buffer_size - runtime->avail)) | |
888 | count1 = runtime->buffer_size - runtime->avail; | |
889 | memcpy(runtime->buffer + runtime->hw_ptr, buffer, count1); | |
890 | runtime->hw_ptr += count1; | |
891 | runtime->hw_ptr %= runtime->buffer_size; | |
892 | runtime->avail += count1; | |
893 | count -= count1; | |
894 | result += count1; | |
895 | if (count > 0) { | |
896 | buffer += count1; | |
897 | count1 = count; | |
898 | if (count1 > (int)(runtime->buffer_size - runtime->avail)) { | |
899 | count1 = runtime->buffer_size - runtime->avail; | |
900 | runtime->xruns += count - count1; | |
901 | } | |
902 | if (count1 > 0) { | |
903 | memcpy(runtime->buffer, buffer, count1); | |
904 | runtime->hw_ptr = count1; | |
905 | runtime->avail += count1; | |
906 | result += count1; | |
907 | } | |
908 | } | |
909 | } | |
910 | if (result > 0) { | |
911 | if (runtime->event) | |
912 | tasklet_hi_schedule(&runtime->tasklet); | |
913 | else if (snd_rawmidi_ready(substream)) | |
914 | wake_up(&runtime->sleep); | |
915 | } | |
916 | spin_unlock_irqrestore(&runtime->lock, flags); | |
917 | return result; | |
918 | } | |
919 | ||
48c9d417 | 920 | static long snd_rawmidi_kernel_read1(struct snd_rawmidi_substream *substream, |
1da177e4 LT |
921 | unsigned char *buf, long count, int kernel) |
922 | { | |
923 | unsigned long flags; | |
924 | long result = 0, count1; | |
48c9d417 | 925 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
1da177e4 LT |
926 | |
927 | while (count > 0 && runtime->avail) { | |
928 | count1 = runtime->buffer_size - runtime->appl_ptr; | |
929 | if (count1 > count) | |
930 | count1 = count; | |
931 | spin_lock_irqsave(&runtime->lock, flags); | |
932 | if (count1 > (int)runtime->avail) | |
933 | count1 = runtime->avail; | |
934 | if (kernel) { | |
935 | memcpy(buf + result, runtime->buffer + runtime->appl_ptr, count1); | |
936 | } else { | |
937 | spin_unlock_irqrestore(&runtime->lock, flags); | |
938 | if (copy_to_user((char __user *)buf + result, | |
939 | runtime->buffer + runtime->appl_ptr, count1)) { | |
940 | return result > 0 ? result : -EFAULT; | |
941 | } | |
942 | spin_lock_irqsave(&runtime->lock, flags); | |
943 | } | |
944 | runtime->appl_ptr += count1; | |
945 | runtime->appl_ptr %= runtime->buffer_size; | |
946 | runtime->avail -= count1; | |
947 | spin_unlock_irqrestore(&runtime->lock, flags); | |
948 | result += count1; | |
949 | count -= count1; | |
950 | } | |
951 | return result; | |
952 | } | |
953 | ||
48c9d417 TI |
954 | long snd_rawmidi_kernel_read(struct snd_rawmidi_substream *substream, |
955 | unsigned char *buf, long count) | |
1da177e4 LT |
956 | { |
957 | snd_rawmidi_input_trigger(substream, 1); | |
958 | return snd_rawmidi_kernel_read1(substream, buf, count, 1); | |
959 | } | |
960 | ||
48c9d417 TI |
961 | static ssize_t snd_rawmidi_read(struct file *file, char __user *buf, size_t count, |
962 | loff_t *offset) | |
1da177e4 LT |
963 | { |
964 | long result; | |
965 | int count1; | |
48c9d417 TI |
966 | struct snd_rawmidi_file *rfile; |
967 | struct snd_rawmidi_substream *substream; | |
968 | struct snd_rawmidi_runtime *runtime; | |
1da177e4 LT |
969 | |
970 | rfile = file->private_data; | |
971 | substream = rfile->input; | |
972 | if (substream == NULL) | |
973 | return -EIO; | |
974 | runtime = substream->runtime; | |
975 | snd_rawmidi_input_trigger(substream, 1); | |
976 | result = 0; | |
977 | while (count > 0) { | |
978 | spin_lock_irq(&runtime->lock); | |
979 | while (!snd_rawmidi_ready(substream)) { | |
980 | wait_queue_t wait; | |
981 | if ((file->f_flags & O_NONBLOCK) != 0 || result > 0) { | |
982 | spin_unlock_irq(&runtime->lock); | |
983 | return result > 0 ? result : -EAGAIN; | |
984 | } | |
985 | init_waitqueue_entry(&wait, current); | |
986 | add_wait_queue(&runtime->sleep, &wait); | |
987 | set_current_state(TASK_INTERRUPTIBLE); | |
988 | spin_unlock_irq(&runtime->lock); | |
989 | schedule(); | |
990 | remove_wait_queue(&runtime->sleep, &wait); | |
991 | if (signal_pending(current)) | |
992 | return result > 0 ? result : -ERESTARTSYS; | |
993 | if (!runtime->avail) | |
994 | return result > 0 ? result : -EIO; | |
995 | spin_lock_irq(&runtime->lock); | |
996 | } | |
997 | spin_unlock_irq(&runtime->lock); | |
4d23359b CL |
998 | count1 = snd_rawmidi_kernel_read1(substream, |
999 | (unsigned char __force *)buf, | |
1000 | count, 0); | |
1da177e4 LT |
1001 | if (count1 < 0) |
1002 | return result > 0 ? result : count1; | |
1003 | result += count1; | |
1004 | buf += count1; | |
1005 | count -= count1; | |
1006 | } | |
1007 | return result; | |
1008 | } | |
1009 | ||
1010 | /** | |
1011 | * snd_rawmidi_transmit_empty - check whether the output buffer is empty | |
1012 | * @substream: the rawmidi substream | |
1013 | * | |
1014 | * Returns 1 if the internal output buffer is empty, 0 if not. | |
1015 | */ | |
48c9d417 | 1016 | int snd_rawmidi_transmit_empty(struct snd_rawmidi_substream *substream) |
1da177e4 | 1017 | { |
48c9d417 | 1018 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
1da177e4 LT |
1019 | int result; |
1020 | unsigned long flags; | |
1021 | ||
1022 | if (runtime->buffer == NULL) { | |
1023 | snd_printd("snd_rawmidi_transmit_empty: output is not active!!!\n"); | |
1024 | return 1; | |
1025 | } | |
1026 | spin_lock_irqsave(&runtime->lock, flags); | |
1027 | result = runtime->avail >= runtime->buffer_size; | |
1028 | spin_unlock_irqrestore(&runtime->lock, flags); | |
1029 | return result; | |
1030 | } | |
1031 | ||
1032 | /** | |
1033 | * snd_rawmidi_transmit_peek - copy data from the internal buffer | |
1034 | * @substream: the rawmidi substream | |
1035 | * @buffer: the buffer pointer | |
1036 | * @count: data size to transfer | |
1037 | * | |
1038 | * Copies data from the internal output buffer to the given buffer. | |
1039 | * | |
1040 | * Call this in the interrupt handler when the midi output is ready, | |
1041 | * and call snd_rawmidi_transmit_ack() after the transmission is | |
1042 | * finished. | |
1043 | * | |
1044 | * Returns the size of copied data, or a negative error code on failure. | |
1045 | */ | |
48c9d417 TI |
1046 | int snd_rawmidi_transmit_peek(struct snd_rawmidi_substream *substream, |
1047 | unsigned char *buffer, int count) | |
1da177e4 LT |
1048 | { |
1049 | unsigned long flags; | |
1050 | int result, count1; | |
48c9d417 | 1051 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
1da177e4 LT |
1052 | |
1053 | if (runtime->buffer == NULL) { | |
1054 | snd_printd("snd_rawmidi_transmit_peek: output is not active!!!\n"); | |
1055 | return -EINVAL; | |
1056 | } | |
1057 | result = 0; | |
1058 | spin_lock_irqsave(&runtime->lock, flags); | |
1059 | if (runtime->avail >= runtime->buffer_size) { | |
1060 | /* warning: lowlevel layer MUST trigger down the hardware */ | |
1061 | goto __skip; | |
1062 | } | |
1063 | if (count == 1) { /* special case, faster code */ | |
1064 | *buffer = runtime->buffer[runtime->hw_ptr]; | |
1065 | result++; | |
1066 | } else { | |
1067 | count1 = runtime->buffer_size - runtime->hw_ptr; | |
1068 | if (count1 > count) | |
1069 | count1 = count; | |
1070 | if (count1 > (int)(runtime->buffer_size - runtime->avail)) | |
1071 | count1 = runtime->buffer_size - runtime->avail; | |
1072 | memcpy(buffer, runtime->buffer + runtime->hw_ptr, count1); | |
1073 | count -= count1; | |
1074 | result += count1; | |
1075 | if (count > 0) { | |
1076 | if (count > (int)(runtime->buffer_size - runtime->avail - count1)) | |
1077 | count = runtime->buffer_size - runtime->avail - count1; | |
1078 | memcpy(buffer + count1, runtime->buffer, count); | |
1079 | result += count; | |
1080 | } | |
1081 | } | |
1082 | __skip: | |
1083 | spin_unlock_irqrestore(&runtime->lock, flags); | |
1084 | return result; | |
1085 | } | |
1086 | ||
1087 | /** | |
1088 | * snd_rawmidi_transmit_ack - acknowledge the transmission | |
1089 | * @substream: the rawmidi substream | |
1090 | * @count: the tranferred count | |
1091 | * | |
1092 | * Advances the hardware pointer for the internal output buffer with | |
1093 | * the given size and updates the condition. | |
1094 | * Call after the transmission is finished. | |
1095 | * | |
1096 | * Returns the advanced size if successful, or a negative error code on failure. | |
1097 | */ | |
48c9d417 | 1098 | int snd_rawmidi_transmit_ack(struct snd_rawmidi_substream *substream, int count) |
1da177e4 LT |
1099 | { |
1100 | unsigned long flags; | |
48c9d417 | 1101 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
1da177e4 LT |
1102 | |
1103 | if (runtime->buffer == NULL) { | |
1104 | snd_printd("snd_rawmidi_transmit_ack: output is not active!!!\n"); | |
1105 | return -EINVAL; | |
1106 | } | |
1107 | spin_lock_irqsave(&runtime->lock, flags); | |
1108 | snd_assert(runtime->avail + count <= runtime->buffer_size, ); | |
1109 | runtime->hw_ptr += count; | |
1110 | runtime->hw_ptr %= runtime->buffer_size; | |
1111 | runtime->avail += count; | |
1112 | substream->bytes += count; | |
1113 | if (count > 0) { | |
1114 | if (runtime->drain || snd_rawmidi_ready(substream)) | |
1115 | wake_up(&runtime->sleep); | |
1116 | } | |
1117 | spin_unlock_irqrestore(&runtime->lock, flags); | |
1118 | return count; | |
1119 | } | |
1120 | ||
1121 | /** | |
1122 | * snd_rawmidi_transmit - copy from the buffer to the device | |
1123 | * @substream: the rawmidi substream | |
df8db936 | 1124 | * @buffer: the buffer pointer |
1da177e4 LT |
1125 | * @count: the data size to transfer |
1126 | * | |
1127 | * Copies data from the buffer to the device and advances the pointer. | |
1128 | * | |
1129 | * Returns the copied size if successful, or a negative error code on failure. | |
1130 | */ | |
48c9d417 TI |
1131 | int snd_rawmidi_transmit(struct snd_rawmidi_substream *substream, |
1132 | unsigned char *buffer, int count) | |
1da177e4 LT |
1133 | { |
1134 | count = snd_rawmidi_transmit_peek(substream, buffer, count); | |
1135 | if (count < 0) | |
1136 | return count; | |
1137 | return snd_rawmidi_transmit_ack(substream, count); | |
1138 | } | |
1139 | ||
48c9d417 TI |
1140 | static long snd_rawmidi_kernel_write1(struct snd_rawmidi_substream *substream, |
1141 | const unsigned char *buf, long count, int kernel) | |
1da177e4 LT |
1142 | { |
1143 | unsigned long flags; | |
1144 | long count1, result; | |
48c9d417 | 1145 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
1da177e4 LT |
1146 | |
1147 | snd_assert(buf != NULL, return -EINVAL); | |
1148 | snd_assert(runtime->buffer != NULL, return -EINVAL); | |
1149 | ||
1150 | result = 0; | |
1151 | spin_lock_irqsave(&runtime->lock, flags); | |
1152 | if (substream->append) { | |
1153 | if ((long)runtime->avail < count) { | |
1154 | spin_unlock_irqrestore(&runtime->lock, flags); | |
1155 | return -EAGAIN; | |
1156 | } | |
1157 | } | |
1158 | while (count > 0 && runtime->avail > 0) { | |
1159 | count1 = runtime->buffer_size - runtime->appl_ptr; | |
1160 | if (count1 > count) | |
1161 | count1 = count; | |
1162 | if (count1 > (long)runtime->avail) | |
1163 | count1 = runtime->avail; | |
1164 | if (kernel) { | |
1165 | memcpy(runtime->buffer + runtime->appl_ptr, buf, count1); | |
1166 | } else { | |
1167 | spin_unlock_irqrestore(&runtime->lock, flags); | |
1168 | if (copy_from_user(runtime->buffer + runtime->appl_ptr, | |
1169 | (char __user *)buf, count1)) { | |
1170 | spin_lock_irqsave(&runtime->lock, flags); | |
1171 | result = result > 0 ? result : -EFAULT; | |
1172 | goto __end; | |
1173 | } | |
1174 | spin_lock_irqsave(&runtime->lock, flags); | |
1175 | } | |
1176 | runtime->appl_ptr += count1; | |
1177 | runtime->appl_ptr %= runtime->buffer_size; | |
1178 | runtime->avail -= count1; | |
1179 | result += count1; | |
1180 | buf += count1; | |
1181 | count -= count1; | |
1182 | } | |
1183 | __end: | |
1184 | count1 = runtime->avail < runtime->buffer_size; | |
1185 | spin_unlock_irqrestore(&runtime->lock, flags); | |
1186 | if (count1) | |
1187 | snd_rawmidi_output_trigger(substream, 1); | |
1188 | return result; | |
1189 | } | |
1190 | ||
48c9d417 TI |
1191 | long snd_rawmidi_kernel_write(struct snd_rawmidi_substream *substream, |
1192 | const unsigned char *buf, long count) | |
1da177e4 LT |
1193 | { |
1194 | return snd_rawmidi_kernel_write1(substream, buf, count, 1); | |
1195 | } | |
1196 | ||
48c9d417 TI |
1197 | static ssize_t snd_rawmidi_write(struct file *file, const char __user *buf, |
1198 | size_t count, loff_t *offset) | |
1da177e4 LT |
1199 | { |
1200 | long result, timeout; | |
1201 | int count1; | |
48c9d417 TI |
1202 | struct snd_rawmidi_file *rfile; |
1203 | struct snd_rawmidi_runtime *runtime; | |
1204 | struct snd_rawmidi_substream *substream; | |
1da177e4 LT |
1205 | |
1206 | rfile = file->private_data; | |
1207 | substream = rfile->output; | |
1208 | runtime = substream->runtime; | |
1209 | /* we cannot put an atomic message to our buffer */ | |
1210 | if (substream->append && count > runtime->buffer_size) | |
1211 | return -EIO; | |
1212 | result = 0; | |
1213 | while (count > 0) { | |
1214 | spin_lock_irq(&runtime->lock); | |
1215 | while (!snd_rawmidi_ready_append(substream, count)) { | |
1216 | wait_queue_t wait; | |
1217 | if (file->f_flags & O_NONBLOCK) { | |
1218 | spin_unlock_irq(&runtime->lock); | |
1219 | return result > 0 ? result : -EAGAIN; | |
1220 | } | |
1221 | init_waitqueue_entry(&wait, current); | |
1222 | add_wait_queue(&runtime->sleep, &wait); | |
1223 | set_current_state(TASK_INTERRUPTIBLE); | |
1224 | spin_unlock_irq(&runtime->lock); | |
1225 | timeout = schedule_timeout(30 * HZ); | |
1226 | remove_wait_queue(&runtime->sleep, &wait); | |
1227 | if (signal_pending(current)) | |
1228 | return result > 0 ? result : -ERESTARTSYS; | |
1229 | if (!runtime->avail && !timeout) | |
1230 | return result > 0 ? result : -EIO; | |
1231 | spin_lock_irq(&runtime->lock); | |
1232 | } | |
1233 | spin_unlock_irq(&runtime->lock); | |
4d23359b CL |
1234 | count1 = snd_rawmidi_kernel_write1(substream, |
1235 | (unsigned char __force *)buf, | |
1236 | count, 0); | |
1da177e4 LT |
1237 | if (count1 < 0) |
1238 | return result > 0 ? result : count1; | |
1239 | result += count1; | |
1240 | buf += count1; | |
1241 | if ((size_t)count1 < count && (file->f_flags & O_NONBLOCK)) | |
1242 | break; | |
1243 | count -= count1; | |
1244 | } | |
1245 | if (file->f_flags & O_SYNC) { | |
1246 | spin_lock_irq(&runtime->lock); | |
1247 | while (runtime->avail != runtime->buffer_size) { | |
1248 | wait_queue_t wait; | |
1249 | unsigned int last_avail = runtime->avail; | |
1250 | init_waitqueue_entry(&wait, current); | |
1251 | add_wait_queue(&runtime->sleep, &wait); | |
1252 | set_current_state(TASK_INTERRUPTIBLE); | |
1253 | spin_unlock_irq(&runtime->lock); | |
1254 | timeout = schedule_timeout(30 * HZ); | |
1255 | remove_wait_queue(&runtime->sleep, &wait); | |
1256 | if (signal_pending(current)) | |
1257 | return result > 0 ? result : -ERESTARTSYS; | |
1258 | if (runtime->avail == last_avail && !timeout) | |
1259 | return result > 0 ? result : -EIO; | |
1260 | spin_lock_irq(&runtime->lock); | |
1261 | } | |
1262 | spin_unlock_irq(&runtime->lock); | |
1263 | } | |
1264 | return result; | |
1265 | } | |
1266 | ||
1267 | static unsigned int snd_rawmidi_poll(struct file *file, poll_table * wait) | |
1268 | { | |
48c9d417 TI |
1269 | struct snd_rawmidi_file *rfile; |
1270 | struct snd_rawmidi_runtime *runtime; | |
1da177e4 LT |
1271 | unsigned int mask; |
1272 | ||
1273 | rfile = file->private_data; | |
1274 | if (rfile->input != NULL) { | |
1275 | runtime = rfile->input->runtime; | |
1276 | snd_rawmidi_input_trigger(rfile->input, 1); | |
1277 | poll_wait(file, &runtime->sleep, wait); | |
1278 | } | |
1279 | if (rfile->output != NULL) { | |
1280 | runtime = rfile->output->runtime; | |
1281 | poll_wait(file, &runtime->sleep, wait); | |
1282 | } | |
1283 | mask = 0; | |
1284 | if (rfile->input != NULL) { | |
1285 | if (snd_rawmidi_ready(rfile->input)) | |
1286 | mask |= POLLIN | POLLRDNORM; | |
1287 | } | |
1288 | if (rfile->output != NULL) { | |
1289 | if (snd_rawmidi_ready(rfile->output)) | |
1290 | mask |= POLLOUT | POLLWRNORM; | |
1291 | } | |
1292 | return mask; | |
1293 | } | |
1294 | ||
1295 | /* | |
1296 | */ | |
1297 | #ifdef CONFIG_COMPAT | |
1298 | #include "rawmidi_compat.c" | |
1299 | #else | |
1300 | #define snd_rawmidi_ioctl_compat NULL | |
1301 | #endif | |
1302 | ||
1303 | /* | |
1304 | ||
1305 | */ | |
1306 | ||
48c9d417 TI |
1307 | static void snd_rawmidi_proc_info_read(struct snd_info_entry *entry, |
1308 | struct snd_info_buffer *buffer) | |
1da177e4 | 1309 | { |
48c9d417 TI |
1310 | struct snd_rawmidi *rmidi; |
1311 | struct snd_rawmidi_substream *substream; | |
1312 | struct snd_rawmidi_runtime *runtime; | |
1da177e4 LT |
1313 | struct list_head *list; |
1314 | ||
1315 | rmidi = entry->private_data; | |
1316 | snd_iprintf(buffer, "%s\n\n", rmidi->name); | |
1317 | down(&rmidi->open_mutex); | |
1318 | if (rmidi->info_flags & SNDRV_RAWMIDI_INFO_OUTPUT) { | |
1319 | list_for_each(list, &rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substreams) { | |
48c9d417 | 1320 | substream = list_entry(list, struct snd_rawmidi_substream, list); |
1da177e4 LT |
1321 | snd_iprintf(buffer, |
1322 | "Output %d\n" | |
1323 | " Tx bytes : %lu\n", | |
1324 | substream->number, | |
1325 | (unsigned long) substream->bytes); | |
1326 | if (substream->opened) { | |
1327 | runtime = substream->runtime; | |
1328 | snd_iprintf(buffer, | |
1329 | " Mode : %s\n" | |
1330 | " Buffer size : %lu\n" | |
1331 | " Avail : %lu\n", | |
1332 | runtime->oss ? "OSS compatible" : "native", | |
1333 | (unsigned long) runtime->buffer_size, | |
1334 | (unsigned long) runtime->avail); | |
1335 | } | |
1336 | } | |
1337 | } | |
1338 | if (rmidi->info_flags & SNDRV_RAWMIDI_INFO_INPUT) { | |
1339 | list_for_each(list, &rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substreams) { | |
48c9d417 | 1340 | substream = list_entry(list, struct snd_rawmidi_substream, list); |
1da177e4 LT |
1341 | snd_iprintf(buffer, |
1342 | "Input %d\n" | |
1343 | " Rx bytes : %lu\n", | |
1344 | substream->number, | |
1345 | (unsigned long) substream->bytes); | |
1346 | if (substream->opened) { | |
1347 | runtime = substream->runtime; | |
1348 | snd_iprintf(buffer, | |
1349 | " Buffer size : %lu\n" | |
1350 | " Avail : %lu\n" | |
1351 | " Overruns : %lu\n", | |
1352 | (unsigned long) runtime->buffer_size, | |
1353 | (unsigned long) runtime->avail, | |
1354 | (unsigned long) runtime->xruns); | |
1355 | } | |
1356 | } | |
1357 | } | |
1358 | up(&rmidi->open_mutex); | |
1359 | } | |
1360 | ||
1361 | /* | |
1362 | * Register functions | |
1363 | */ | |
1364 | ||
1365 | static struct file_operations snd_rawmidi_f_ops = | |
1366 | { | |
1367 | .owner = THIS_MODULE, | |
1368 | .read = snd_rawmidi_read, | |
1369 | .write = snd_rawmidi_write, | |
1370 | .open = snd_rawmidi_open, | |
1371 | .release = snd_rawmidi_release, | |
1372 | .poll = snd_rawmidi_poll, | |
1373 | .unlocked_ioctl = snd_rawmidi_ioctl, | |
1374 | .compat_ioctl = snd_rawmidi_ioctl_compat, | |
1375 | }; | |
1376 | ||
48c9d417 TI |
1377 | static int snd_rawmidi_alloc_substreams(struct snd_rawmidi *rmidi, |
1378 | struct snd_rawmidi_str *stream, | |
1da177e4 LT |
1379 | int direction, |
1380 | int count) | |
1381 | { | |
48c9d417 | 1382 | struct snd_rawmidi_substream *substream; |
1da177e4 LT |
1383 | int idx; |
1384 | ||
1385 | INIT_LIST_HEAD(&stream->substreams); | |
1386 | for (idx = 0; idx < count; idx++) { | |
ca2c0966 | 1387 | substream = kzalloc(sizeof(*substream), GFP_KERNEL); |
73e77ba0 TI |
1388 | if (substream == NULL) { |
1389 | snd_printk(KERN_ERR "rawmidi: cannot allocate substream\n"); | |
1da177e4 | 1390 | return -ENOMEM; |
73e77ba0 | 1391 | } |
1da177e4 LT |
1392 | substream->stream = direction; |
1393 | substream->number = idx; | |
1394 | substream->rmidi = rmidi; | |
1395 | substream->pstr = stream; | |
1396 | list_add_tail(&substream->list, &stream->substreams); | |
1397 | stream->substream_count++; | |
1398 | } | |
1399 | return 0; | |
1400 | } | |
1401 | ||
1402 | /** | |
1403 | * snd_rawmidi_new - create a rawmidi instance | |
1404 | * @card: the card instance | |
1405 | * @id: the id string | |
1406 | * @device: the device index | |
1407 | * @output_count: the number of output streams | |
1408 | * @input_count: the number of input streams | |
1409 | * @rrawmidi: the pointer to store the new rawmidi instance | |
1410 | * | |
1411 | * Creates a new rawmidi instance. | |
1412 | * Use snd_rawmidi_set_ops() to set the operators to the new instance. | |
1413 | * | |
1414 | * Returns zero if successful, or a negative error code on failure. | |
1415 | */ | |
48c9d417 | 1416 | int snd_rawmidi_new(struct snd_card *card, char *id, int device, |
1da177e4 | 1417 | int output_count, int input_count, |
48c9d417 | 1418 | struct snd_rawmidi ** rrawmidi) |
1da177e4 | 1419 | { |
48c9d417 | 1420 | struct snd_rawmidi *rmidi; |
1da177e4 | 1421 | int err; |
48c9d417 | 1422 | static struct snd_device_ops ops = { |
1da177e4 LT |
1423 | .dev_free = snd_rawmidi_dev_free, |
1424 | .dev_register = snd_rawmidi_dev_register, | |
1425 | .dev_disconnect = snd_rawmidi_dev_disconnect, | |
1426 | .dev_unregister = snd_rawmidi_dev_unregister | |
1427 | }; | |
1428 | ||
1429 | snd_assert(rrawmidi != NULL, return -EINVAL); | |
1430 | *rrawmidi = NULL; | |
1431 | snd_assert(card != NULL, return -ENXIO); | |
ca2c0966 | 1432 | rmidi = kzalloc(sizeof(*rmidi), GFP_KERNEL); |
73e77ba0 TI |
1433 | if (rmidi == NULL) { |
1434 | snd_printk(KERN_ERR "rawmidi: cannot allocate\n"); | |
1da177e4 | 1435 | return -ENOMEM; |
73e77ba0 | 1436 | } |
1da177e4 LT |
1437 | rmidi->card = card; |
1438 | rmidi->device = device; | |
1439 | init_MUTEX(&rmidi->open_mutex); | |
1440 | init_waitqueue_head(&rmidi->open_wait); | |
1441 | if (id != NULL) | |
1442 | strlcpy(rmidi->id, id, sizeof(rmidi->id)); | |
73e77ba0 TI |
1443 | if ((err = snd_rawmidi_alloc_substreams(rmidi, |
1444 | &rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT], | |
1445 | SNDRV_RAWMIDI_STREAM_INPUT, | |
1446 | input_count)) < 0) { | |
1da177e4 LT |
1447 | snd_rawmidi_free(rmidi); |
1448 | return err; | |
1449 | } | |
73e77ba0 TI |
1450 | if ((err = snd_rawmidi_alloc_substreams(rmidi, |
1451 | &rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT], | |
1452 | SNDRV_RAWMIDI_STREAM_OUTPUT, | |
1453 | output_count)) < 0) { | |
1da177e4 LT |
1454 | snd_rawmidi_free(rmidi); |
1455 | return err; | |
1456 | } | |
1457 | if ((err = snd_device_new(card, SNDRV_DEV_RAWMIDI, rmidi, &ops)) < 0) { | |
1458 | snd_rawmidi_free(rmidi); | |
1459 | return err; | |
1460 | } | |
1461 | *rrawmidi = rmidi; | |
1462 | return 0; | |
1463 | } | |
1464 | ||
48c9d417 | 1465 | static void snd_rawmidi_free_substreams(struct snd_rawmidi_str *stream) |
1da177e4 | 1466 | { |
48c9d417 | 1467 | struct snd_rawmidi_substream *substream; |
1da177e4 LT |
1468 | |
1469 | while (!list_empty(&stream->substreams)) { | |
48c9d417 | 1470 | substream = list_entry(stream->substreams.next, struct snd_rawmidi_substream, list); |
1da177e4 LT |
1471 | list_del(&substream->list); |
1472 | kfree(substream); | |
1473 | } | |
1474 | } | |
1475 | ||
48c9d417 | 1476 | static int snd_rawmidi_free(struct snd_rawmidi *rmidi) |
1da177e4 LT |
1477 | { |
1478 | snd_assert(rmidi != NULL, return -ENXIO); | |
1479 | snd_rawmidi_free_substreams(&rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT]); | |
1480 | snd_rawmidi_free_substreams(&rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT]); | |
1481 | if (rmidi->private_free) | |
1482 | rmidi->private_free(rmidi); | |
1483 | kfree(rmidi); | |
1484 | return 0; | |
1485 | } | |
1486 | ||
48c9d417 | 1487 | static int snd_rawmidi_dev_free(struct snd_device *device) |
1da177e4 | 1488 | { |
48c9d417 | 1489 | struct snd_rawmidi *rmidi = device->device_data; |
1da177e4 LT |
1490 | return snd_rawmidi_free(rmidi); |
1491 | } | |
1492 | ||
1493 | #if defined(CONFIG_SND_SEQUENCER) || (defined(MODULE) && defined(CONFIG_SND_SEQUENCER_MODULE)) | |
48c9d417 | 1494 | static void snd_rawmidi_dev_seq_free(struct snd_seq_device *device) |
1da177e4 | 1495 | { |
48c9d417 | 1496 | struct snd_rawmidi *rmidi = device->private_data; |
1da177e4 LT |
1497 | rmidi->seq_dev = NULL; |
1498 | } | |
1499 | #endif | |
1500 | ||
48c9d417 | 1501 | static int snd_rawmidi_dev_register(struct snd_device *device) |
1da177e4 | 1502 | { |
f87135f5 | 1503 | int err; |
48c9d417 | 1504 | struct snd_info_entry *entry; |
1da177e4 | 1505 | char name[16]; |
48c9d417 | 1506 | struct snd_rawmidi *rmidi = device->device_data; |
1da177e4 LT |
1507 | |
1508 | if (rmidi->device >= SNDRV_RAWMIDI_DEVICES) | |
1509 | return -ENOMEM; | |
1510 | down(®ister_mutex); | |
f87135f5 | 1511 | if (snd_rawmidi_search(rmidi->card, rmidi->device)) { |
1da177e4 LT |
1512 | up(®ister_mutex); |
1513 | return -EBUSY; | |
1514 | } | |
f87135f5 | 1515 | list_add_tail(&rmidi->list, &snd_rawmidi_devices); |
1da177e4 LT |
1516 | sprintf(name, "midiC%iD%i", rmidi->card->number, rmidi->device); |
1517 | if ((err = snd_register_device(SNDRV_DEVICE_TYPE_RAWMIDI, | |
1518 | rmidi->card, rmidi->device, | |
f87135f5 | 1519 | &snd_rawmidi_f_ops, rmidi, name)) < 0) { |
1da177e4 | 1520 | snd_printk(KERN_ERR "unable to register rawmidi device %i:%i\n", rmidi->card->number, rmidi->device); |
f87135f5 | 1521 | list_del(&rmidi->list); |
1da177e4 LT |
1522 | up(®ister_mutex); |
1523 | return err; | |
1524 | } | |
1525 | if (rmidi->ops && rmidi->ops->dev_register && | |
1526 | (err = rmidi->ops->dev_register(rmidi)) < 0) { | |
1527 | snd_unregister_device(SNDRV_DEVICE_TYPE_RAWMIDI, rmidi->card, rmidi->device); | |
f87135f5 | 1528 | list_del(&rmidi->list); |
1da177e4 LT |
1529 | up(®ister_mutex); |
1530 | return err; | |
1531 | } | |
1532 | #ifdef CONFIG_SND_OSSEMUL | |
1533 | rmidi->ossreg = 0; | |
1534 | if ((int)rmidi->device == midi_map[rmidi->card->number]) { | |
1535 | if (snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_MIDI, | |
f87135f5 CL |
1536 | rmidi->card, 0, &snd_rawmidi_f_ops, |
1537 | rmidi, name) < 0) { | |
1da177e4 LT |
1538 | snd_printk(KERN_ERR "unable to register OSS rawmidi device %i:%i\n", rmidi->card->number, 0); |
1539 | } else { | |
1540 | rmidi->ossreg++; | |
1541 | #ifdef SNDRV_OSS_INFO_DEV_MIDI | |
1542 | snd_oss_info_register(SNDRV_OSS_INFO_DEV_MIDI, rmidi->card->number, rmidi->name); | |
1543 | #endif | |
1544 | } | |
1545 | } | |
1546 | if ((int)rmidi->device == amidi_map[rmidi->card->number]) { | |
1547 | if (snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_MIDI, | |
f87135f5 CL |
1548 | rmidi->card, 1, &snd_rawmidi_f_ops, |
1549 | rmidi, name) < 0) { | |
1da177e4 LT |
1550 | snd_printk(KERN_ERR "unable to register OSS rawmidi device %i:%i\n", rmidi->card->number, 1); |
1551 | } else { | |
1552 | rmidi->ossreg++; | |
1553 | } | |
1554 | } | |
1555 | #endif /* CONFIG_SND_OSSEMUL */ | |
1556 | up(®ister_mutex); | |
1557 | sprintf(name, "midi%d", rmidi->device); | |
1558 | entry = snd_info_create_card_entry(rmidi->card, name, rmidi->card->proc_root); | |
1559 | if (entry) { | |
1560 | entry->private_data = rmidi; | |
1561 | entry->c.text.read_size = 1024; | |
1562 | entry->c.text.read = snd_rawmidi_proc_info_read; | |
1563 | if (snd_info_register(entry) < 0) { | |
1564 | snd_info_free_entry(entry); | |
1565 | entry = NULL; | |
1566 | } | |
1567 | } | |
1568 | rmidi->proc_entry = entry; | |
1569 | #if defined(CONFIG_SND_SEQUENCER) || (defined(MODULE) && defined(CONFIG_SND_SEQUENCER_MODULE)) | |
1570 | if (!rmidi->ops || !rmidi->ops->dev_register) { /* own registration mechanism */ | |
1571 | if (snd_seq_device_new(rmidi->card, rmidi->device, SNDRV_SEQ_DEV_ID_MIDISYNTH, 0, &rmidi->seq_dev) >= 0) { | |
1572 | rmidi->seq_dev->private_data = rmidi; | |
1573 | rmidi->seq_dev->private_free = snd_rawmidi_dev_seq_free; | |
1574 | sprintf(rmidi->seq_dev->name, "MIDI %d-%d", rmidi->card->number, rmidi->device); | |
1575 | snd_device_register(rmidi->card, rmidi->seq_dev); | |
1576 | } | |
1577 | } | |
1578 | #endif | |
1579 | return 0; | |
1580 | } | |
1581 | ||
48c9d417 | 1582 | static int snd_rawmidi_dev_disconnect(struct snd_device *device) |
1da177e4 | 1583 | { |
48c9d417 | 1584 | struct snd_rawmidi *rmidi = device->device_data; |
1da177e4 LT |
1585 | |
1586 | down(®ister_mutex); | |
f87135f5 | 1587 | list_del_init(&rmidi->list); |
1da177e4 LT |
1588 | up(®ister_mutex); |
1589 | return 0; | |
1590 | } | |
1591 | ||
48c9d417 | 1592 | static int snd_rawmidi_dev_unregister(struct snd_device *device) |
1da177e4 | 1593 | { |
48c9d417 | 1594 | struct snd_rawmidi *rmidi = device->device_data; |
1da177e4 LT |
1595 | |
1596 | snd_assert(rmidi != NULL, return -ENXIO); | |
1597 | down(®ister_mutex); | |
f87135f5 | 1598 | list_del(&rmidi->list); |
1da177e4 LT |
1599 | if (rmidi->proc_entry) { |
1600 | snd_info_unregister(rmidi->proc_entry); | |
1601 | rmidi->proc_entry = NULL; | |
1602 | } | |
1603 | #ifdef CONFIG_SND_OSSEMUL | |
1604 | if (rmidi->ossreg) { | |
1605 | if ((int)rmidi->device == midi_map[rmidi->card->number]) { | |
1606 | snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_MIDI, rmidi->card, 0); | |
1607 | #ifdef SNDRV_OSS_INFO_DEV_MIDI | |
1608 | snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_MIDI, rmidi->card->number); | |
1609 | #endif | |
1610 | } | |
1611 | if ((int)rmidi->device == amidi_map[rmidi->card->number]) | |
1612 | snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_MIDI, rmidi->card, 1); | |
1613 | rmidi->ossreg = 0; | |
1614 | } | |
1615 | #endif /* CONFIG_SND_OSSEMUL */ | |
1616 | if (rmidi->ops && rmidi->ops->dev_unregister) | |
1617 | rmidi->ops->dev_unregister(rmidi); | |
1618 | snd_unregister_device(SNDRV_DEVICE_TYPE_RAWMIDI, rmidi->card, rmidi->device); | |
1619 | up(®ister_mutex); | |
1620 | #if defined(CONFIG_SND_SEQUENCER) || (defined(MODULE) && defined(CONFIG_SND_SEQUENCER_MODULE)) | |
1621 | if (rmidi->seq_dev) { | |
1622 | snd_device_free(rmidi->card, rmidi->seq_dev); | |
1623 | rmidi->seq_dev = NULL; | |
1624 | } | |
1625 | #endif | |
1626 | return snd_rawmidi_free(rmidi); | |
1627 | } | |
1628 | ||
1629 | /** | |
1630 | * snd_rawmidi_set_ops - set the rawmidi operators | |
1631 | * @rmidi: the rawmidi instance | |
1632 | * @stream: the stream direction, SNDRV_RAWMIDI_STREAM_XXX | |
1633 | * @ops: the operator table | |
1634 | * | |
1635 | * Sets the rawmidi operators for the given stream direction. | |
1636 | */ | |
48c9d417 TI |
1637 | void snd_rawmidi_set_ops(struct snd_rawmidi *rmidi, int stream, |
1638 | struct snd_rawmidi_ops *ops) | |
1da177e4 LT |
1639 | { |
1640 | struct list_head *list; | |
48c9d417 | 1641 | struct snd_rawmidi_substream *substream; |
1da177e4 LT |
1642 | |
1643 | list_for_each(list, &rmidi->streams[stream].substreams) { | |
48c9d417 | 1644 | substream = list_entry(list, struct snd_rawmidi_substream, list); |
1da177e4 LT |
1645 | substream->ops = ops; |
1646 | } | |
1647 | } | |
1648 | ||
1649 | /* | |
1650 | * ENTRY functions | |
1651 | */ | |
1652 | ||
1653 | static int __init alsa_rawmidi_init(void) | |
1654 | { | |
1655 | ||
1656 | snd_ctl_register_ioctl(snd_rawmidi_control_ioctl); | |
1657 | snd_ctl_register_ioctl_compat(snd_rawmidi_control_ioctl); | |
1658 | #ifdef CONFIG_SND_OSSEMUL | |
1659 | { int i; | |
1660 | /* check device map table */ | |
1661 | for (i = 0; i < SNDRV_CARDS; i++) { | |
1662 | if (midi_map[i] < 0 || midi_map[i] >= SNDRV_RAWMIDI_DEVICES) { | |
1663 | snd_printk(KERN_ERR "invalid midi_map[%d] = %d\n", i, midi_map[i]); | |
1664 | midi_map[i] = 0; | |
1665 | } | |
1666 | if (amidi_map[i] < 0 || amidi_map[i] >= SNDRV_RAWMIDI_DEVICES) { | |
1667 | snd_printk(KERN_ERR "invalid amidi_map[%d] = %d\n", i, amidi_map[i]); | |
1668 | amidi_map[i] = 1; | |
1669 | } | |
1670 | } | |
1671 | } | |
1672 | #endif /* CONFIG_SND_OSSEMUL */ | |
1673 | return 0; | |
1674 | } | |
1675 | ||
1676 | static void __exit alsa_rawmidi_exit(void) | |
1677 | { | |
1678 | snd_ctl_unregister_ioctl(snd_rawmidi_control_ioctl); | |
1679 | snd_ctl_unregister_ioctl_compat(snd_rawmidi_control_ioctl); | |
1680 | } | |
1681 | ||
1682 | module_init(alsa_rawmidi_init) | |
1683 | module_exit(alsa_rawmidi_exit) | |
1684 | ||
1685 | EXPORT_SYMBOL(snd_rawmidi_output_params); | |
1686 | EXPORT_SYMBOL(snd_rawmidi_input_params); | |
1687 | EXPORT_SYMBOL(snd_rawmidi_drop_output); | |
1688 | EXPORT_SYMBOL(snd_rawmidi_drain_output); | |
1689 | EXPORT_SYMBOL(snd_rawmidi_drain_input); | |
1690 | EXPORT_SYMBOL(snd_rawmidi_receive); | |
1691 | EXPORT_SYMBOL(snd_rawmidi_transmit_empty); | |
1692 | EXPORT_SYMBOL(snd_rawmidi_transmit_peek); | |
1693 | EXPORT_SYMBOL(snd_rawmidi_transmit_ack); | |
1694 | EXPORT_SYMBOL(snd_rawmidi_transmit); | |
1695 | EXPORT_SYMBOL(snd_rawmidi_new); | |
1696 | EXPORT_SYMBOL(snd_rawmidi_set_ops); | |
1da177e4 LT |
1697 | EXPORT_SYMBOL(snd_rawmidi_info_select); |
1698 | EXPORT_SYMBOL(snd_rawmidi_kernel_open); | |
1699 | EXPORT_SYMBOL(snd_rawmidi_kernel_release); | |
1700 | EXPORT_SYMBOL(snd_rawmidi_kernel_read); | |
1701 | EXPORT_SYMBOL(snd_rawmidi_kernel_write); |