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> | |
1a60d4c5 | 31 | #include <linux/mutex.h> |
1da177e4 LT |
32 | #include <linux/moduleparam.h> |
33 | #include <linux/delay.h> | |
34 | #include <linux/wait.h> | |
35 | #include <sound/rawmidi.h> | |
36 | #include <sound/info.h> | |
37 | #include <sound/control.h> | |
38 | #include <sound/minors.h> | |
39 | #include <sound/initval.h> | |
40 | ||
41 | MODULE_AUTHOR("Jaroslav Kysela <perex@suse.cz>"); | |
42 | MODULE_DESCRIPTION("Midlevel RawMidi code for ALSA."); | |
43 | MODULE_LICENSE("GPL"); | |
44 | ||
45 | #ifdef CONFIG_SND_OSSEMUL | |
46 | static int midi_map[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS-1)] = 0}; | |
47 | static int amidi_map[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS-1)] = 1}; | |
48 | module_param_array(midi_map, int, NULL, 0444); | |
49 | MODULE_PARM_DESC(midi_map, "Raw MIDI device number assigned to 1st OSS device."); | |
50 | module_param_array(amidi_map, int, NULL, 0444); | |
51 | MODULE_PARM_DESC(amidi_map, "Raw MIDI device number assigned to 2nd OSS device."); | |
52 | #endif /* CONFIG_SND_OSSEMUL */ | |
53 | ||
48c9d417 TI |
54 | static int snd_rawmidi_free(struct snd_rawmidi *rawmidi); |
55 | static int snd_rawmidi_dev_free(struct snd_device *device); | |
56 | static int snd_rawmidi_dev_register(struct snd_device *device); | |
57 | static int snd_rawmidi_dev_disconnect(struct snd_device *device); | |
58 | static int snd_rawmidi_dev_unregister(struct snd_device *device); | |
1da177e4 | 59 | |
f87135f5 | 60 | static LIST_HEAD(snd_rawmidi_devices); |
1a60d4c5 | 61 | static DEFINE_MUTEX(register_mutex); |
1da177e4 | 62 | |
f87135f5 CL |
63 | static struct snd_rawmidi *snd_rawmidi_search(struct snd_card *card, int device) |
64 | { | |
65 | struct list_head *p; | |
66 | struct snd_rawmidi *rawmidi; | |
67 | ||
68 | list_for_each(p, &snd_rawmidi_devices) { | |
69 | rawmidi = list_entry(p, struct snd_rawmidi, list); | |
70 | if (rawmidi->card == card && rawmidi->device == device) | |
71 | return rawmidi; | |
72 | } | |
73 | return NULL; | |
74 | } | |
75 | ||
1da177e4 LT |
76 | static inline unsigned short snd_rawmidi_file_flags(struct file *file) |
77 | { | |
78 | switch (file->f_mode & (FMODE_READ | FMODE_WRITE)) { | |
79 | case FMODE_WRITE: | |
80 | return SNDRV_RAWMIDI_LFLG_OUTPUT; | |
81 | case FMODE_READ: | |
82 | return SNDRV_RAWMIDI_LFLG_INPUT; | |
83 | default: | |
84 | return SNDRV_RAWMIDI_LFLG_OPEN; | |
85 | } | |
86 | } | |
87 | ||
48c9d417 | 88 | static inline int snd_rawmidi_ready(struct snd_rawmidi_substream *substream) |
1da177e4 | 89 | { |
48c9d417 | 90 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
1da177e4 LT |
91 | return runtime->avail >= runtime->avail_min; |
92 | } | |
93 | ||
48c9d417 TI |
94 | static inline int snd_rawmidi_ready_append(struct snd_rawmidi_substream *substream, |
95 | size_t count) | |
1da177e4 | 96 | { |
48c9d417 | 97 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
1da177e4 LT |
98 | return runtime->avail >= runtime->avail_min && |
99 | (!substream->append || runtime->avail >= count); | |
100 | } | |
101 | ||
102 | static void snd_rawmidi_input_event_tasklet(unsigned long data) | |
103 | { | |
48c9d417 | 104 | struct snd_rawmidi_substream *substream = (struct snd_rawmidi_substream *)data; |
1da177e4 LT |
105 | substream->runtime->event(substream); |
106 | } | |
107 | ||
108 | static void snd_rawmidi_output_trigger_tasklet(unsigned long data) | |
109 | { | |
48c9d417 | 110 | struct snd_rawmidi_substream *substream = (struct snd_rawmidi_substream *)data; |
1da177e4 LT |
111 | substream->ops->trigger(substream, 1); |
112 | } | |
113 | ||
48c9d417 | 114 | static int snd_rawmidi_runtime_create(struct snd_rawmidi_substream *substream) |
1da177e4 | 115 | { |
48c9d417 | 116 | struct snd_rawmidi_runtime *runtime; |
1da177e4 | 117 | |
ca2c0966 | 118 | if ((runtime = kzalloc(sizeof(*runtime), GFP_KERNEL)) == NULL) |
1da177e4 LT |
119 | return -ENOMEM; |
120 | spin_lock_init(&runtime->lock); | |
121 | init_waitqueue_head(&runtime->sleep); | |
122 | if (substream->stream == SNDRV_RAWMIDI_STREAM_INPUT) | |
123 | tasklet_init(&runtime->tasklet, | |
124 | snd_rawmidi_input_event_tasklet, | |
125 | (unsigned long)substream); | |
126 | else | |
127 | tasklet_init(&runtime->tasklet, | |
128 | snd_rawmidi_output_trigger_tasklet, | |
129 | (unsigned long)substream); | |
130 | runtime->event = NULL; | |
131 | runtime->buffer_size = PAGE_SIZE; | |
132 | runtime->avail_min = 1; | |
133 | if (substream->stream == SNDRV_RAWMIDI_STREAM_INPUT) | |
134 | runtime->avail = 0; | |
135 | else | |
136 | runtime->avail = runtime->buffer_size; | |
137 | if ((runtime->buffer = kmalloc(runtime->buffer_size, GFP_KERNEL)) == NULL) { | |
138 | kfree(runtime); | |
139 | return -ENOMEM; | |
140 | } | |
141 | runtime->appl_ptr = runtime->hw_ptr = 0; | |
142 | substream->runtime = runtime; | |
143 | return 0; | |
144 | } | |
145 | ||
48c9d417 | 146 | static int snd_rawmidi_runtime_free(struct snd_rawmidi_substream *substream) |
1da177e4 | 147 | { |
48c9d417 | 148 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
1da177e4 LT |
149 | |
150 | kfree(runtime->buffer); | |
151 | kfree(runtime); | |
152 | substream->runtime = NULL; | |
153 | return 0; | |
154 | } | |
155 | ||
48c9d417 | 156 | static inline void snd_rawmidi_output_trigger(struct snd_rawmidi_substream *substream,int up) |
1da177e4 LT |
157 | { |
158 | if (up) { | |
159 | tasklet_hi_schedule(&substream->runtime->tasklet); | |
160 | } else { | |
161 | tasklet_kill(&substream->runtime->tasklet); | |
162 | substream->ops->trigger(substream, 0); | |
163 | } | |
164 | } | |
165 | ||
48c9d417 | 166 | static void snd_rawmidi_input_trigger(struct snd_rawmidi_substream *substream, int up) |
1da177e4 LT |
167 | { |
168 | substream->ops->trigger(substream, up); | |
169 | if (!up && substream->runtime->event) | |
170 | tasklet_kill(&substream->runtime->tasklet); | |
171 | } | |
172 | ||
48c9d417 | 173 | int snd_rawmidi_drop_output(struct snd_rawmidi_substream *substream) |
1da177e4 LT |
174 | { |
175 | unsigned long flags; | |
48c9d417 | 176 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
1da177e4 LT |
177 | |
178 | snd_rawmidi_output_trigger(substream, 0); | |
179 | runtime->drain = 0; | |
180 | spin_lock_irqsave(&runtime->lock, flags); | |
181 | runtime->appl_ptr = runtime->hw_ptr = 0; | |
182 | runtime->avail = runtime->buffer_size; | |
183 | spin_unlock_irqrestore(&runtime->lock, flags); | |
184 | return 0; | |
185 | } | |
186 | ||
48c9d417 | 187 | int snd_rawmidi_drain_output(struct snd_rawmidi_substream *substream) |
1da177e4 LT |
188 | { |
189 | int err; | |
190 | long timeout; | |
48c9d417 | 191 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
1da177e4 LT |
192 | |
193 | err = 0; | |
194 | runtime->drain = 1; | |
195 | timeout = wait_event_interruptible_timeout(runtime->sleep, | |
196 | (runtime->avail >= runtime->buffer_size), | |
197 | 10*HZ); | |
198 | if (signal_pending(current)) | |
199 | err = -ERESTARTSYS; | |
200 | if (runtime->avail < runtime->buffer_size && !timeout) { | |
201 | snd_printk(KERN_WARNING "rawmidi drain error (avail = %li, buffer_size = %li)\n", (long)runtime->avail, (long)runtime->buffer_size); | |
202 | err = -EIO; | |
203 | } | |
204 | runtime->drain = 0; | |
205 | if (err != -ERESTARTSYS) { | |
206 | /* we need wait a while to make sure that Tx FIFOs are empty */ | |
207 | if (substream->ops->drain) | |
208 | substream->ops->drain(substream); | |
209 | else | |
210 | msleep(50); | |
211 | snd_rawmidi_drop_output(substream); | |
212 | } | |
213 | return err; | |
214 | } | |
215 | ||
48c9d417 | 216 | int snd_rawmidi_drain_input(struct snd_rawmidi_substream *substream) |
1da177e4 LT |
217 | { |
218 | unsigned long flags; | |
48c9d417 | 219 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
1da177e4 LT |
220 | |
221 | snd_rawmidi_input_trigger(substream, 0); | |
222 | runtime->drain = 0; | |
223 | spin_lock_irqsave(&runtime->lock, flags); | |
224 | runtime->appl_ptr = runtime->hw_ptr = 0; | |
225 | runtime->avail = 0; | |
226 | spin_unlock_irqrestore(&runtime->lock, flags); | |
227 | return 0; | |
228 | } | |
229 | ||
f87135f5 | 230 | int snd_rawmidi_kernel_open(struct snd_card *card, int device, int subdevice, |
48c9d417 | 231 | int mode, struct snd_rawmidi_file * rfile) |
1da177e4 | 232 | { |
48c9d417 | 233 | struct snd_rawmidi *rmidi; |
1da177e4 | 234 | struct list_head *list1, *list2; |
48c9d417 TI |
235 | struct snd_rawmidi_substream *sinput = NULL, *soutput = NULL; |
236 | struct snd_rawmidi_runtime *input = NULL, *output = NULL; | |
1da177e4 LT |
237 | int err; |
238 | ||
239 | if (rfile) | |
240 | rfile->input = rfile->output = NULL; | |
1a60d4c5 | 241 | mutex_lock(®ister_mutex); |
f87135f5 | 242 | rmidi = snd_rawmidi_search(card, device); |
1a60d4c5 | 243 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
244 | if (rmidi == NULL) { |
245 | err = -ENODEV; | |
246 | goto __error1; | |
247 | } | |
248 | if (!try_module_get(rmidi->card->module)) { | |
249 | err = -EFAULT; | |
250 | goto __error1; | |
251 | } | |
252 | if (!(mode & SNDRV_RAWMIDI_LFLG_NOOPENLOCK)) | |
1a60d4c5 | 253 | mutex_lock(&rmidi->open_mutex); |
1da177e4 LT |
254 | if (mode & SNDRV_RAWMIDI_LFLG_INPUT) { |
255 | if (!(rmidi->info_flags & SNDRV_RAWMIDI_INFO_INPUT)) { | |
256 | err = -ENXIO; | |
257 | goto __error; | |
258 | } | |
259 | if (subdevice >= 0 && (unsigned int)subdevice >= rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substream_count) { | |
260 | err = -ENODEV; | |
261 | goto __error; | |
262 | } | |
263 | if (rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substream_opened >= | |
264 | rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substream_count) { | |
265 | err = -EAGAIN; | |
266 | goto __error; | |
267 | } | |
268 | } | |
269 | if (mode & SNDRV_RAWMIDI_LFLG_OUTPUT) { | |
270 | if (!(rmidi->info_flags & SNDRV_RAWMIDI_INFO_OUTPUT)) { | |
271 | err = -ENXIO; | |
272 | goto __error; | |
273 | } | |
274 | if (subdevice >= 0 && (unsigned int)subdevice >= rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substream_count) { | |
275 | err = -ENODEV; | |
276 | goto __error; | |
277 | } | |
278 | if (rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substream_opened >= | |
279 | rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substream_count) { | |
280 | err = -EAGAIN; | |
281 | goto __error; | |
282 | } | |
283 | } | |
284 | list1 = rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substreams.next; | |
285 | while (1) { | |
286 | if (list1 == &rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substreams) { | |
287 | sinput = NULL; | |
288 | if (mode & SNDRV_RAWMIDI_LFLG_INPUT) { | |
289 | err = -EAGAIN; | |
290 | goto __error; | |
291 | } | |
292 | break; | |
293 | } | |
48c9d417 | 294 | sinput = list_entry(list1, struct snd_rawmidi_substream, list); |
1da177e4 LT |
295 | if ((mode & SNDRV_RAWMIDI_LFLG_INPUT) && sinput->opened) |
296 | goto __nexti; | |
297 | if (subdevice < 0 || (subdevice >= 0 && subdevice == sinput->number)) | |
298 | break; | |
299 | __nexti: | |
300 | list1 = list1->next; | |
301 | } | |
302 | list2 = rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substreams.next; | |
303 | while (1) { | |
304 | if (list2 == &rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substreams) { | |
305 | soutput = NULL; | |
306 | if (mode & SNDRV_RAWMIDI_LFLG_OUTPUT) { | |
307 | err = -EAGAIN; | |
308 | goto __error; | |
309 | } | |
310 | break; | |
311 | } | |
48c9d417 | 312 | soutput = list_entry(list2, struct snd_rawmidi_substream, list); |
1da177e4 LT |
313 | if (mode & SNDRV_RAWMIDI_LFLG_OUTPUT) { |
314 | if (mode & SNDRV_RAWMIDI_LFLG_APPEND) { | |
315 | if (soutput->opened && !soutput->append) | |
316 | goto __nexto; | |
317 | } else { | |
318 | if (soutput->opened) | |
319 | goto __nexto; | |
320 | } | |
321 | } | |
322 | if (subdevice < 0 || (subdevice >= 0 && subdevice == soutput->number)) | |
323 | break; | |
324 | __nexto: | |
325 | list2 = list2->next; | |
326 | } | |
327 | if (mode & SNDRV_RAWMIDI_LFLG_INPUT) { | |
328 | if ((err = snd_rawmidi_runtime_create(sinput)) < 0) | |
329 | goto __error; | |
330 | input = sinput->runtime; | |
331 | if ((err = sinput->ops->open(sinput)) < 0) | |
332 | goto __error; | |
333 | sinput->opened = 1; | |
334 | rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substream_opened++; | |
335 | } else { | |
336 | sinput = NULL; | |
337 | } | |
338 | if (mode & SNDRV_RAWMIDI_LFLG_OUTPUT) { | |
339 | if (soutput->opened) | |
340 | goto __skip_output; | |
341 | if ((err = snd_rawmidi_runtime_create(soutput)) < 0) { | |
342 | if (mode & SNDRV_RAWMIDI_LFLG_INPUT) | |
343 | sinput->ops->close(sinput); | |
344 | goto __error; | |
345 | } | |
346 | output = soutput->runtime; | |
347 | if ((err = soutput->ops->open(soutput)) < 0) { | |
348 | if (mode & SNDRV_RAWMIDI_LFLG_INPUT) | |
349 | sinput->ops->close(sinput); | |
350 | goto __error; | |
351 | } | |
352 | __skip_output: | |
353 | soutput->opened = 1; | |
354 | if (mode & SNDRV_RAWMIDI_LFLG_APPEND) | |
355 | soutput->append = 1; | |
356 | if (soutput->use_count++ == 0) | |
357 | soutput->active_sensing = 1; | |
358 | rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substream_opened++; | |
359 | } else { | |
360 | soutput = NULL; | |
361 | } | |
362 | if (!(mode & SNDRV_RAWMIDI_LFLG_NOOPENLOCK)) | |
1a60d4c5 | 363 | mutex_unlock(&rmidi->open_mutex); |
1da177e4 LT |
364 | if (rfile) { |
365 | rfile->rmidi = rmidi; | |
366 | rfile->input = sinput; | |
367 | rfile->output = soutput; | |
368 | } | |
369 | return 0; | |
370 | ||
371 | __error: | |
372 | if (input != NULL) | |
373 | snd_rawmidi_runtime_free(sinput); | |
374 | if (output != NULL) | |
375 | snd_rawmidi_runtime_free(soutput); | |
376 | module_put(rmidi->card->module); | |
377 | if (!(mode & SNDRV_RAWMIDI_LFLG_NOOPENLOCK)) | |
1a60d4c5 | 378 | mutex_unlock(&rmidi->open_mutex); |
1da177e4 LT |
379 | __error1: |
380 | return err; | |
381 | } | |
382 | ||
383 | static int snd_rawmidi_open(struct inode *inode, struct file *file) | |
384 | { | |
385 | int maj = imajor(inode); | |
48c9d417 | 386 | struct snd_card *card; |
f87135f5 | 387 | int subdevice; |
1da177e4 LT |
388 | unsigned short fflags; |
389 | int err; | |
48c9d417 TI |
390 | struct snd_rawmidi *rmidi; |
391 | struct snd_rawmidi_file *rawmidi_file; | |
1da177e4 LT |
392 | wait_queue_t wait; |
393 | struct list_head *list; | |
48c9d417 | 394 | struct snd_ctl_file *kctl; |
1da177e4 | 395 | |
f1902860 | 396 | if (maj == snd_major) { |
f87135f5 CL |
397 | rmidi = snd_lookup_minor_data(iminor(inode), |
398 | SNDRV_DEVICE_TYPE_RAWMIDI); | |
1da177e4 | 399 | #ifdef CONFIG_SND_OSSEMUL |
f1902860 | 400 | } else if (maj == SOUND_MAJOR) { |
f87135f5 CL |
401 | rmidi = snd_lookup_oss_minor_data(iminor(inode), |
402 | SNDRV_OSS_DEVICE_TYPE_MIDI); | |
1da177e4 | 403 | #endif |
f1902860 | 404 | } else |
1da177e4 | 405 | return -ENXIO; |
1da177e4 | 406 | |
1da177e4 LT |
407 | if (rmidi == NULL) |
408 | return -ENODEV; | |
1da177e4 LT |
409 | if ((file->f_flags & O_APPEND) && !(file->f_flags & O_NONBLOCK)) |
410 | return -EINVAL; /* invalid combination */ | |
411 | card = rmidi->card; | |
412 | err = snd_card_file_add(card, file); | |
413 | if (err < 0) | |
414 | return -ENODEV; | |
415 | fflags = snd_rawmidi_file_flags(file); | |
f1902860 | 416 | if ((file->f_flags & O_APPEND) || maj == SOUND_MAJOR) /* OSS emul? */ |
1da177e4 LT |
417 | fflags |= SNDRV_RAWMIDI_LFLG_APPEND; |
418 | fflags |= SNDRV_RAWMIDI_LFLG_NOOPENLOCK; | |
419 | rawmidi_file = kmalloc(sizeof(*rawmidi_file), GFP_KERNEL); | |
420 | if (rawmidi_file == NULL) { | |
421 | snd_card_file_remove(card, file); | |
422 | return -ENOMEM; | |
423 | } | |
424 | init_waitqueue_entry(&wait, current); | |
425 | add_wait_queue(&rmidi->open_wait, &wait); | |
1a60d4c5 | 426 | mutex_lock(&rmidi->open_mutex); |
1da177e4 LT |
427 | while (1) { |
428 | subdevice = -1; | |
429 | down_read(&card->controls_rwsem); | |
430 | list_for_each(list, &card->ctl_files) { | |
431 | kctl = snd_ctl_file(list); | |
432 | if (kctl->pid == current->pid) { | |
433 | subdevice = kctl->prefer_rawmidi_subdevice; | |
434 | break; | |
435 | } | |
436 | } | |
437 | up_read(&card->controls_rwsem); | |
f87135f5 CL |
438 | err = snd_rawmidi_kernel_open(rmidi->card, rmidi->device, |
439 | subdevice, fflags, rawmidi_file); | |
1da177e4 LT |
440 | if (err >= 0) |
441 | break; | |
442 | if (err == -EAGAIN) { | |
443 | if (file->f_flags & O_NONBLOCK) { | |
444 | err = -EBUSY; | |
445 | break; | |
446 | } | |
447 | } else | |
448 | break; | |
449 | set_current_state(TASK_INTERRUPTIBLE); | |
1a60d4c5 | 450 | mutex_unlock(&rmidi->open_mutex); |
1da177e4 | 451 | schedule(); |
1a60d4c5 | 452 | mutex_lock(&rmidi->open_mutex); |
1da177e4 LT |
453 | if (signal_pending(current)) { |
454 | err = -ERESTARTSYS; | |
455 | break; | |
456 | } | |
457 | } | |
458 | #ifdef CONFIG_SND_OSSEMUL | |
459 | if (rawmidi_file->input && rawmidi_file->input->runtime) | |
460 | rawmidi_file->input->runtime->oss = (maj == SOUND_MAJOR); | |
461 | if (rawmidi_file->output && rawmidi_file->output->runtime) | |
462 | rawmidi_file->output->runtime->oss = (maj == SOUND_MAJOR); | |
463 | #endif | |
464 | remove_wait_queue(&rmidi->open_wait, &wait); | |
465 | if (err >= 0) { | |
466 | file->private_data = rawmidi_file; | |
467 | } else { | |
468 | snd_card_file_remove(card, file); | |
469 | kfree(rawmidi_file); | |
470 | } | |
1a60d4c5 | 471 | mutex_unlock(&rmidi->open_mutex); |
1da177e4 LT |
472 | return err; |
473 | } | |
474 | ||
48c9d417 | 475 | int snd_rawmidi_kernel_release(struct snd_rawmidi_file * rfile) |
1da177e4 | 476 | { |
48c9d417 TI |
477 | struct snd_rawmidi *rmidi; |
478 | struct snd_rawmidi_substream *substream; | |
479 | struct snd_rawmidi_runtime *runtime; | |
1da177e4 LT |
480 | |
481 | snd_assert(rfile != NULL, return -ENXIO); | |
482 | snd_assert(rfile->input != NULL || rfile->output != NULL, return -ENXIO); | |
483 | rmidi = rfile->rmidi; | |
1a60d4c5 | 484 | mutex_lock(&rmidi->open_mutex); |
1da177e4 LT |
485 | if (rfile->input != NULL) { |
486 | substream = rfile->input; | |
487 | rfile->input = NULL; | |
488 | runtime = substream->runtime; | |
489 | snd_rawmidi_input_trigger(substream, 0); | |
490 | substream->ops->close(substream); | |
491 | if (runtime->private_free != NULL) | |
492 | runtime->private_free(substream); | |
493 | snd_rawmidi_runtime_free(substream); | |
494 | substream->opened = 0; | |
495 | rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substream_opened--; | |
496 | } | |
497 | if (rfile->output != NULL) { | |
498 | substream = rfile->output; | |
499 | rfile->output = NULL; | |
500 | if (--substream->use_count == 0) { | |
501 | runtime = substream->runtime; | |
502 | if (substream->active_sensing) { | |
503 | unsigned char buf = 0xfe; | |
504 | /* sending single active sensing message to shut the device up */ | |
505 | snd_rawmidi_kernel_write(substream, &buf, 1); | |
506 | } | |
507 | if (snd_rawmidi_drain_output(substream) == -ERESTARTSYS) | |
508 | snd_rawmidi_output_trigger(substream, 0); | |
509 | substream->ops->close(substream); | |
510 | if (runtime->private_free != NULL) | |
511 | runtime->private_free(substream); | |
512 | snd_rawmidi_runtime_free(substream); | |
513 | substream->opened = 0; | |
514 | substream->append = 0; | |
515 | } | |
516 | rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substream_opened--; | |
517 | } | |
1a60d4c5 | 518 | mutex_unlock(&rmidi->open_mutex); |
1da177e4 LT |
519 | module_put(rmidi->card->module); |
520 | return 0; | |
521 | } | |
522 | ||
523 | static int snd_rawmidi_release(struct inode *inode, struct file *file) | |
524 | { | |
48c9d417 TI |
525 | struct snd_rawmidi_file *rfile; |
526 | struct snd_rawmidi *rmidi; | |
1da177e4 LT |
527 | int err; |
528 | ||
529 | rfile = file->private_data; | |
530 | err = snd_rawmidi_kernel_release(rfile); | |
531 | rmidi = rfile->rmidi; | |
532 | wake_up(&rmidi->open_wait); | |
533 | kfree(rfile); | |
534 | snd_card_file_remove(rmidi->card, file); | |
535 | return err; | |
536 | } | |
537 | ||
18612048 AB |
538 | static int snd_rawmidi_info(struct snd_rawmidi_substream *substream, |
539 | struct snd_rawmidi_info *info) | |
1da177e4 | 540 | { |
48c9d417 | 541 | struct snd_rawmidi *rmidi; |
1da177e4 LT |
542 | |
543 | if (substream == NULL) | |
544 | return -ENODEV; | |
545 | rmidi = substream->rmidi; | |
546 | memset(info, 0, sizeof(*info)); | |
547 | info->card = rmidi->card->number; | |
548 | info->device = rmidi->device; | |
549 | info->subdevice = substream->number; | |
550 | info->stream = substream->stream; | |
551 | info->flags = rmidi->info_flags; | |
552 | strcpy(info->id, rmidi->id); | |
553 | strcpy(info->name, rmidi->name); | |
554 | strcpy(info->subname, substream->name); | |
555 | info->subdevices_count = substream->pstr->substream_count; | |
556 | info->subdevices_avail = (substream->pstr->substream_count - | |
557 | substream->pstr->substream_opened); | |
558 | return 0; | |
559 | } | |
560 | ||
48c9d417 TI |
561 | static int snd_rawmidi_info_user(struct snd_rawmidi_substream *substream, |
562 | struct snd_rawmidi_info __user * _info) | |
1da177e4 | 563 | { |
48c9d417 | 564 | struct snd_rawmidi_info info; |
1da177e4 LT |
565 | int err; |
566 | if ((err = snd_rawmidi_info(substream, &info)) < 0) | |
567 | return err; | |
48c9d417 | 568 | if (copy_to_user(_info, &info, sizeof(struct snd_rawmidi_info))) |
1da177e4 LT |
569 | return -EFAULT; |
570 | return 0; | |
571 | } | |
572 | ||
48c9d417 | 573 | int snd_rawmidi_info_select(struct snd_card *card, struct snd_rawmidi_info *info) |
1da177e4 | 574 | { |
48c9d417 TI |
575 | struct snd_rawmidi *rmidi; |
576 | struct snd_rawmidi_str *pstr; | |
577 | struct snd_rawmidi_substream *substream; | |
1da177e4 | 578 | struct list_head *list; |
f87135f5 | 579 | |
1a60d4c5 | 580 | mutex_lock(®ister_mutex); |
f87135f5 | 581 | rmidi = snd_rawmidi_search(card, info->device); |
1a60d4c5 | 582 | mutex_unlock(®ister_mutex); |
a106cd3d CL |
583 | if (!rmidi) |
584 | return -ENXIO; | |
1da177e4 LT |
585 | if (info->stream < 0 || info->stream > 1) |
586 | return -EINVAL; | |
587 | pstr = &rmidi->streams[info->stream]; | |
588 | if (pstr->substream_count == 0) | |
589 | return -ENOENT; | |
590 | if (info->subdevice >= pstr->substream_count) | |
591 | return -ENXIO; | |
592 | list_for_each(list, &pstr->substreams) { | |
48c9d417 | 593 | substream = list_entry(list, struct snd_rawmidi_substream, list); |
1da177e4 LT |
594 | if ((unsigned int)substream->number == info->subdevice) |
595 | return snd_rawmidi_info(substream, info); | |
596 | } | |
597 | return -ENXIO; | |
598 | } | |
599 | ||
48c9d417 TI |
600 | static int snd_rawmidi_info_select_user(struct snd_card *card, |
601 | struct snd_rawmidi_info __user *_info) | |
1da177e4 LT |
602 | { |
603 | int err; | |
48c9d417 | 604 | struct snd_rawmidi_info info; |
1da177e4 LT |
605 | if (get_user(info.device, &_info->device)) |
606 | return -EFAULT; | |
607 | if (get_user(info.stream, &_info->stream)) | |
608 | return -EFAULT; | |
609 | if (get_user(info.subdevice, &_info->subdevice)) | |
610 | return -EFAULT; | |
611 | if ((err = snd_rawmidi_info_select(card, &info)) < 0) | |
612 | return err; | |
48c9d417 | 613 | if (copy_to_user(_info, &info, sizeof(struct snd_rawmidi_info))) |
1da177e4 LT |
614 | return -EFAULT; |
615 | return 0; | |
616 | } | |
617 | ||
48c9d417 TI |
618 | int snd_rawmidi_output_params(struct snd_rawmidi_substream *substream, |
619 | struct snd_rawmidi_params * params) | |
1da177e4 LT |
620 | { |
621 | char *newbuf; | |
48c9d417 | 622 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
1da177e4 LT |
623 | |
624 | if (substream->append && substream->use_count > 1) | |
625 | return -EBUSY; | |
626 | snd_rawmidi_drain_output(substream); | |
627 | if (params->buffer_size < 32 || params->buffer_size > 1024L * 1024L) { | |
628 | return -EINVAL; | |
629 | } | |
630 | if (params->avail_min < 1 || params->avail_min > params->buffer_size) { | |
631 | return -EINVAL; | |
632 | } | |
633 | if (params->buffer_size != runtime->buffer_size) { | |
634 | if ((newbuf = (char *) kmalloc(params->buffer_size, GFP_KERNEL)) == NULL) | |
635 | return -ENOMEM; | |
636 | kfree(runtime->buffer); | |
637 | runtime->buffer = newbuf; | |
638 | runtime->buffer_size = params->buffer_size; | |
1b98ea47 | 639 | runtime->avail = runtime->buffer_size; |
1da177e4 LT |
640 | } |
641 | runtime->avail_min = params->avail_min; | |
642 | substream->active_sensing = !params->no_active_sensing; | |
643 | return 0; | |
644 | } | |
645 | ||
48c9d417 TI |
646 | int snd_rawmidi_input_params(struct snd_rawmidi_substream *substream, |
647 | struct snd_rawmidi_params * params) | |
1da177e4 LT |
648 | { |
649 | char *newbuf; | |
48c9d417 | 650 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
1da177e4 LT |
651 | |
652 | snd_rawmidi_drain_input(substream); | |
653 | if (params->buffer_size < 32 || params->buffer_size > 1024L * 1024L) { | |
654 | return -EINVAL; | |
655 | } | |
656 | if (params->avail_min < 1 || params->avail_min > params->buffer_size) { | |
657 | return -EINVAL; | |
658 | } | |
659 | if (params->buffer_size != runtime->buffer_size) { | |
660 | if ((newbuf = (char *) kmalloc(params->buffer_size, GFP_KERNEL)) == NULL) | |
661 | return -ENOMEM; | |
662 | kfree(runtime->buffer); | |
663 | runtime->buffer = newbuf; | |
664 | runtime->buffer_size = params->buffer_size; | |
665 | } | |
666 | runtime->avail_min = params->avail_min; | |
667 | return 0; | |
668 | } | |
669 | ||
48c9d417 TI |
670 | static int snd_rawmidi_output_status(struct snd_rawmidi_substream *substream, |
671 | struct snd_rawmidi_status * status) | |
1da177e4 | 672 | { |
48c9d417 | 673 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
1da177e4 LT |
674 | |
675 | memset(status, 0, sizeof(*status)); | |
676 | status->stream = SNDRV_RAWMIDI_STREAM_OUTPUT; | |
677 | spin_lock_irq(&runtime->lock); | |
678 | status->avail = runtime->avail; | |
679 | spin_unlock_irq(&runtime->lock); | |
680 | return 0; | |
681 | } | |
682 | ||
48c9d417 TI |
683 | static int snd_rawmidi_input_status(struct snd_rawmidi_substream *substream, |
684 | struct snd_rawmidi_status * status) | |
1da177e4 | 685 | { |
48c9d417 | 686 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
1da177e4 LT |
687 | |
688 | memset(status, 0, sizeof(*status)); | |
689 | status->stream = SNDRV_RAWMIDI_STREAM_INPUT; | |
690 | spin_lock_irq(&runtime->lock); | |
691 | status->avail = runtime->avail; | |
692 | status->xruns = runtime->xruns; | |
693 | runtime->xruns = 0; | |
694 | spin_unlock_irq(&runtime->lock); | |
695 | return 0; | |
696 | } | |
697 | ||
698 | static long snd_rawmidi_ioctl(struct file *file, unsigned int cmd, unsigned long arg) | |
699 | { | |
48c9d417 | 700 | struct snd_rawmidi_file *rfile; |
1da177e4 LT |
701 | void __user *argp = (void __user *)arg; |
702 | ||
703 | rfile = file->private_data; | |
704 | if (((cmd >> 8) & 0xff) != 'W') | |
705 | return -ENOTTY; | |
706 | switch (cmd) { | |
707 | case SNDRV_RAWMIDI_IOCTL_PVERSION: | |
708 | return put_user(SNDRV_RAWMIDI_VERSION, (int __user *)argp) ? -EFAULT : 0; | |
709 | case SNDRV_RAWMIDI_IOCTL_INFO: | |
710 | { | |
48c9d417 TI |
711 | int stream; |
712 | struct snd_rawmidi_info __user *info = argp; | |
1da177e4 LT |
713 | if (get_user(stream, &info->stream)) |
714 | return -EFAULT; | |
715 | switch (stream) { | |
716 | case SNDRV_RAWMIDI_STREAM_INPUT: | |
717 | return snd_rawmidi_info_user(rfile->input, info); | |
718 | case SNDRV_RAWMIDI_STREAM_OUTPUT: | |
719 | return snd_rawmidi_info_user(rfile->output, info); | |
720 | default: | |
721 | return -EINVAL; | |
722 | } | |
723 | } | |
724 | case SNDRV_RAWMIDI_IOCTL_PARAMS: | |
725 | { | |
48c9d417 TI |
726 | struct snd_rawmidi_params params; |
727 | if (copy_from_user(¶ms, argp, sizeof(struct snd_rawmidi_params))) | |
1da177e4 LT |
728 | return -EFAULT; |
729 | switch (params.stream) { | |
730 | case SNDRV_RAWMIDI_STREAM_OUTPUT: | |
731 | if (rfile->output == NULL) | |
732 | return -EINVAL; | |
733 | return snd_rawmidi_output_params(rfile->output, ¶ms); | |
734 | case SNDRV_RAWMIDI_STREAM_INPUT: | |
735 | if (rfile->input == NULL) | |
736 | return -EINVAL; | |
737 | return snd_rawmidi_input_params(rfile->input, ¶ms); | |
738 | default: | |
739 | return -EINVAL; | |
740 | } | |
741 | } | |
742 | case SNDRV_RAWMIDI_IOCTL_STATUS: | |
743 | { | |
744 | int err = 0; | |
48c9d417 TI |
745 | struct snd_rawmidi_status status; |
746 | if (copy_from_user(&status, argp, sizeof(struct snd_rawmidi_status))) | |
1da177e4 LT |
747 | return -EFAULT; |
748 | switch (status.stream) { | |
749 | case SNDRV_RAWMIDI_STREAM_OUTPUT: | |
750 | if (rfile->output == NULL) | |
751 | return -EINVAL; | |
752 | err = snd_rawmidi_output_status(rfile->output, &status); | |
753 | break; | |
754 | case SNDRV_RAWMIDI_STREAM_INPUT: | |
755 | if (rfile->input == NULL) | |
756 | return -EINVAL; | |
757 | err = snd_rawmidi_input_status(rfile->input, &status); | |
758 | break; | |
759 | default: | |
760 | return -EINVAL; | |
761 | } | |
762 | if (err < 0) | |
763 | return err; | |
48c9d417 | 764 | if (copy_to_user(argp, &status, sizeof(struct snd_rawmidi_status))) |
1da177e4 LT |
765 | return -EFAULT; |
766 | return 0; | |
767 | } | |
768 | case SNDRV_RAWMIDI_IOCTL_DROP: | |
769 | { | |
770 | int val; | |
771 | if (get_user(val, (int __user *) argp)) | |
772 | return -EFAULT; | |
773 | switch (val) { | |
774 | case SNDRV_RAWMIDI_STREAM_OUTPUT: | |
775 | if (rfile->output == NULL) | |
776 | return -EINVAL; | |
777 | return snd_rawmidi_drop_output(rfile->output); | |
778 | default: | |
779 | return -EINVAL; | |
780 | } | |
781 | } | |
782 | case SNDRV_RAWMIDI_IOCTL_DRAIN: | |
783 | { | |
784 | int val; | |
785 | if (get_user(val, (int __user *) argp)) | |
786 | return -EFAULT; | |
787 | switch (val) { | |
788 | case SNDRV_RAWMIDI_STREAM_OUTPUT: | |
789 | if (rfile->output == NULL) | |
790 | return -EINVAL; | |
791 | return snd_rawmidi_drain_output(rfile->output); | |
792 | case SNDRV_RAWMIDI_STREAM_INPUT: | |
793 | if (rfile->input == NULL) | |
794 | return -EINVAL; | |
795 | return snd_rawmidi_drain_input(rfile->input); | |
796 | default: | |
797 | return -EINVAL; | |
798 | } | |
799 | } | |
800 | #ifdef CONFIG_SND_DEBUG | |
801 | default: | |
802 | snd_printk(KERN_WARNING "rawmidi: unknown command = 0x%x\n", cmd); | |
803 | #endif | |
804 | } | |
805 | return -ENOTTY; | |
806 | } | |
807 | ||
48c9d417 TI |
808 | static int snd_rawmidi_control_ioctl(struct snd_card *card, |
809 | struct snd_ctl_file *control, | |
1da177e4 LT |
810 | unsigned int cmd, |
811 | unsigned long arg) | |
812 | { | |
813 | void __user *argp = (void __user *)arg; | |
1da177e4 | 814 | |
1da177e4 LT |
815 | switch (cmd) { |
816 | case SNDRV_CTL_IOCTL_RAWMIDI_NEXT_DEVICE: | |
817 | { | |
818 | int device; | |
819 | ||
820 | if (get_user(device, (int __user *)argp)) | |
821 | return -EFAULT; | |
1a60d4c5 | 822 | mutex_lock(®ister_mutex); |
1da177e4 LT |
823 | device = device < 0 ? 0 : device + 1; |
824 | while (device < SNDRV_RAWMIDI_DEVICES) { | |
f87135f5 | 825 | if (snd_rawmidi_search(card, device)) |
1da177e4 LT |
826 | break; |
827 | device++; | |
828 | } | |
829 | if (device == SNDRV_RAWMIDI_DEVICES) | |
830 | device = -1; | |
1a60d4c5 | 831 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
832 | if (put_user(device, (int __user *)argp)) |
833 | return -EFAULT; | |
834 | return 0; | |
835 | } | |
836 | case SNDRV_CTL_IOCTL_RAWMIDI_PREFER_SUBDEVICE: | |
837 | { | |
838 | int val; | |
839 | ||
840 | if (get_user(val, (int __user *)argp)) | |
841 | return -EFAULT; | |
842 | control->prefer_rawmidi_subdevice = val; | |
843 | return 0; | |
844 | } | |
845 | case SNDRV_CTL_IOCTL_RAWMIDI_INFO: | |
846 | return snd_rawmidi_info_select_user(card, argp); | |
847 | } | |
848 | return -ENOIOCTLCMD; | |
849 | } | |
850 | ||
851 | /** | |
852 | * snd_rawmidi_receive - receive the input data from the device | |
853 | * @substream: the rawmidi substream | |
854 | * @buffer: the buffer pointer | |
855 | * @count: the data size to read | |
856 | * | |
857 | * Reads the data from the internal buffer. | |
858 | * | |
859 | * Returns the size of read data, or a negative error code on failure. | |
860 | */ | |
48c9d417 TI |
861 | int snd_rawmidi_receive(struct snd_rawmidi_substream *substream, |
862 | const unsigned char *buffer, int count) | |
1da177e4 LT |
863 | { |
864 | unsigned long flags; | |
865 | int result = 0, count1; | |
48c9d417 | 866 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
1da177e4 LT |
867 | |
868 | if (runtime->buffer == NULL) { | |
869 | snd_printd("snd_rawmidi_receive: input is not active!!!\n"); | |
870 | return -EINVAL; | |
871 | } | |
872 | spin_lock_irqsave(&runtime->lock, flags); | |
873 | if (count == 1) { /* special case, faster code */ | |
874 | substream->bytes++; | |
875 | if (runtime->avail < runtime->buffer_size) { | |
876 | runtime->buffer[runtime->hw_ptr++] = buffer[0]; | |
877 | runtime->hw_ptr %= runtime->buffer_size; | |
878 | runtime->avail++; | |
879 | result++; | |
880 | } else { | |
881 | runtime->xruns++; | |
882 | } | |
883 | } else { | |
884 | substream->bytes += count; | |
885 | count1 = runtime->buffer_size - runtime->hw_ptr; | |
886 | if (count1 > count) | |
887 | count1 = count; | |
888 | if (count1 > (int)(runtime->buffer_size - runtime->avail)) | |
889 | count1 = runtime->buffer_size - runtime->avail; | |
890 | memcpy(runtime->buffer + runtime->hw_ptr, buffer, count1); | |
891 | runtime->hw_ptr += count1; | |
892 | runtime->hw_ptr %= runtime->buffer_size; | |
893 | runtime->avail += count1; | |
894 | count -= count1; | |
895 | result += count1; | |
896 | if (count > 0) { | |
897 | buffer += count1; | |
898 | count1 = count; | |
899 | if (count1 > (int)(runtime->buffer_size - runtime->avail)) { | |
900 | count1 = runtime->buffer_size - runtime->avail; | |
901 | runtime->xruns += count - count1; | |
902 | } | |
903 | if (count1 > 0) { | |
904 | memcpy(runtime->buffer, buffer, count1); | |
905 | runtime->hw_ptr = count1; | |
906 | runtime->avail += count1; | |
907 | result += count1; | |
908 | } | |
909 | } | |
910 | } | |
911 | if (result > 0) { | |
912 | if (runtime->event) | |
913 | tasklet_hi_schedule(&runtime->tasklet); | |
914 | else if (snd_rawmidi_ready(substream)) | |
915 | wake_up(&runtime->sleep); | |
916 | } | |
917 | spin_unlock_irqrestore(&runtime->lock, flags); | |
918 | return result; | |
919 | } | |
920 | ||
48c9d417 | 921 | static long snd_rawmidi_kernel_read1(struct snd_rawmidi_substream *substream, |
1da177e4 LT |
922 | unsigned char *buf, long count, int kernel) |
923 | { | |
924 | unsigned long flags; | |
925 | long result = 0, count1; | |
48c9d417 | 926 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
1da177e4 LT |
927 | |
928 | while (count > 0 && runtime->avail) { | |
929 | count1 = runtime->buffer_size - runtime->appl_ptr; | |
930 | if (count1 > count) | |
931 | count1 = count; | |
932 | spin_lock_irqsave(&runtime->lock, flags); | |
933 | if (count1 > (int)runtime->avail) | |
934 | count1 = runtime->avail; | |
935 | if (kernel) { | |
936 | memcpy(buf + result, runtime->buffer + runtime->appl_ptr, count1); | |
937 | } else { | |
938 | spin_unlock_irqrestore(&runtime->lock, flags); | |
939 | if (copy_to_user((char __user *)buf + result, | |
940 | runtime->buffer + runtime->appl_ptr, count1)) { | |
941 | return result > 0 ? result : -EFAULT; | |
942 | } | |
943 | spin_lock_irqsave(&runtime->lock, flags); | |
944 | } | |
945 | runtime->appl_ptr += count1; | |
946 | runtime->appl_ptr %= runtime->buffer_size; | |
947 | runtime->avail -= count1; | |
948 | spin_unlock_irqrestore(&runtime->lock, flags); | |
949 | result += count1; | |
950 | count -= count1; | |
951 | } | |
952 | return result; | |
953 | } | |
954 | ||
48c9d417 TI |
955 | long snd_rawmidi_kernel_read(struct snd_rawmidi_substream *substream, |
956 | unsigned char *buf, long count) | |
1da177e4 LT |
957 | { |
958 | snd_rawmidi_input_trigger(substream, 1); | |
959 | return snd_rawmidi_kernel_read1(substream, buf, count, 1); | |
960 | } | |
961 | ||
48c9d417 TI |
962 | static ssize_t snd_rawmidi_read(struct file *file, char __user *buf, size_t count, |
963 | loff_t *offset) | |
1da177e4 LT |
964 | { |
965 | long result; | |
966 | int count1; | |
48c9d417 TI |
967 | struct snd_rawmidi_file *rfile; |
968 | struct snd_rawmidi_substream *substream; | |
969 | struct snd_rawmidi_runtime *runtime; | |
1da177e4 LT |
970 | |
971 | rfile = file->private_data; | |
972 | substream = rfile->input; | |
973 | if (substream == NULL) | |
974 | return -EIO; | |
975 | runtime = substream->runtime; | |
976 | snd_rawmidi_input_trigger(substream, 1); | |
977 | result = 0; | |
978 | while (count > 0) { | |
979 | spin_lock_irq(&runtime->lock); | |
980 | while (!snd_rawmidi_ready(substream)) { | |
981 | wait_queue_t wait; | |
982 | if ((file->f_flags & O_NONBLOCK) != 0 || result > 0) { | |
983 | spin_unlock_irq(&runtime->lock); | |
984 | return result > 0 ? result : -EAGAIN; | |
985 | } | |
986 | init_waitqueue_entry(&wait, current); | |
987 | add_wait_queue(&runtime->sleep, &wait); | |
988 | set_current_state(TASK_INTERRUPTIBLE); | |
989 | spin_unlock_irq(&runtime->lock); | |
990 | schedule(); | |
991 | remove_wait_queue(&runtime->sleep, &wait); | |
992 | if (signal_pending(current)) | |
993 | return result > 0 ? result : -ERESTARTSYS; | |
994 | if (!runtime->avail) | |
995 | return result > 0 ? result : -EIO; | |
996 | spin_lock_irq(&runtime->lock); | |
997 | } | |
998 | spin_unlock_irq(&runtime->lock); | |
4d23359b CL |
999 | count1 = snd_rawmidi_kernel_read1(substream, |
1000 | (unsigned char __force *)buf, | |
1001 | count, 0); | |
1da177e4 LT |
1002 | if (count1 < 0) |
1003 | return result > 0 ? result : count1; | |
1004 | result += count1; | |
1005 | buf += count1; | |
1006 | count -= count1; | |
1007 | } | |
1008 | return result; | |
1009 | } | |
1010 | ||
1011 | /** | |
1012 | * snd_rawmidi_transmit_empty - check whether the output buffer is empty | |
1013 | * @substream: the rawmidi substream | |
1014 | * | |
1015 | * Returns 1 if the internal output buffer is empty, 0 if not. | |
1016 | */ | |
48c9d417 | 1017 | int snd_rawmidi_transmit_empty(struct snd_rawmidi_substream *substream) |
1da177e4 | 1018 | { |
48c9d417 | 1019 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
1da177e4 LT |
1020 | int result; |
1021 | unsigned long flags; | |
1022 | ||
1023 | if (runtime->buffer == NULL) { | |
1024 | snd_printd("snd_rawmidi_transmit_empty: output is not active!!!\n"); | |
1025 | return 1; | |
1026 | } | |
1027 | spin_lock_irqsave(&runtime->lock, flags); | |
1028 | result = runtime->avail >= runtime->buffer_size; | |
1029 | spin_unlock_irqrestore(&runtime->lock, flags); | |
1030 | return result; | |
1031 | } | |
1032 | ||
1033 | /** | |
1034 | * snd_rawmidi_transmit_peek - copy data from the internal buffer | |
1035 | * @substream: the rawmidi substream | |
1036 | * @buffer: the buffer pointer | |
1037 | * @count: data size to transfer | |
1038 | * | |
1039 | * Copies data from the internal output buffer to the given buffer. | |
1040 | * | |
1041 | * Call this in the interrupt handler when the midi output is ready, | |
1042 | * and call snd_rawmidi_transmit_ack() after the transmission is | |
1043 | * finished. | |
1044 | * | |
1045 | * Returns the size of copied data, or a negative error code on failure. | |
1046 | */ | |
48c9d417 TI |
1047 | int snd_rawmidi_transmit_peek(struct snd_rawmidi_substream *substream, |
1048 | unsigned char *buffer, int count) | |
1da177e4 LT |
1049 | { |
1050 | unsigned long flags; | |
1051 | int result, count1; | |
48c9d417 | 1052 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
1da177e4 LT |
1053 | |
1054 | if (runtime->buffer == NULL) { | |
1055 | snd_printd("snd_rawmidi_transmit_peek: output is not active!!!\n"); | |
1056 | return -EINVAL; | |
1057 | } | |
1058 | result = 0; | |
1059 | spin_lock_irqsave(&runtime->lock, flags); | |
1060 | if (runtime->avail >= runtime->buffer_size) { | |
1061 | /* warning: lowlevel layer MUST trigger down the hardware */ | |
1062 | goto __skip; | |
1063 | } | |
1064 | if (count == 1) { /* special case, faster code */ | |
1065 | *buffer = runtime->buffer[runtime->hw_ptr]; | |
1066 | result++; | |
1067 | } else { | |
1068 | count1 = runtime->buffer_size - runtime->hw_ptr; | |
1069 | if (count1 > count) | |
1070 | count1 = count; | |
1071 | if (count1 > (int)(runtime->buffer_size - runtime->avail)) | |
1072 | count1 = runtime->buffer_size - runtime->avail; | |
1073 | memcpy(buffer, runtime->buffer + runtime->hw_ptr, count1); | |
1074 | count -= count1; | |
1075 | result += count1; | |
1076 | if (count > 0) { | |
1077 | if (count > (int)(runtime->buffer_size - runtime->avail - count1)) | |
1078 | count = runtime->buffer_size - runtime->avail - count1; | |
1079 | memcpy(buffer + count1, runtime->buffer, count); | |
1080 | result += count; | |
1081 | } | |
1082 | } | |
1083 | __skip: | |
1084 | spin_unlock_irqrestore(&runtime->lock, flags); | |
1085 | return result; | |
1086 | } | |
1087 | ||
1088 | /** | |
1089 | * snd_rawmidi_transmit_ack - acknowledge the transmission | |
1090 | * @substream: the rawmidi substream | |
1091 | * @count: the tranferred count | |
1092 | * | |
1093 | * Advances the hardware pointer for the internal output buffer with | |
1094 | * the given size and updates the condition. | |
1095 | * Call after the transmission is finished. | |
1096 | * | |
1097 | * Returns the advanced size if successful, or a negative error code on failure. | |
1098 | */ | |
48c9d417 | 1099 | int snd_rawmidi_transmit_ack(struct snd_rawmidi_substream *substream, int count) |
1da177e4 LT |
1100 | { |
1101 | unsigned long flags; | |
48c9d417 | 1102 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
1da177e4 LT |
1103 | |
1104 | if (runtime->buffer == NULL) { | |
1105 | snd_printd("snd_rawmidi_transmit_ack: output is not active!!!\n"); | |
1106 | return -EINVAL; | |
1107 | } | |
1108 | spin_lock_irqsave(&runtime->lock, flags); | |
1109 | snd_assert(runtime->avail + count <= runtime->buffer_size, ); | |
1110 | runtime->hw_ptr += count; | |
1111 | runtime->hw_ptr %= runtime->buffer_size; | |
1112 | runtime->avail += count; | |
1113 | substream->bytes += count; | |
1114 | if (count > 0) { | |
1115 | if (runtime->drain || snd_rawmidi_ready(substream)) | |
1116 | wake_up(&runtime->sleep); | |
1117 | } | |
1118 | spin_unlock_irqrestore(&runtime->lock, flags); | |
1119 | return count; | |
1120 | } | |
1121 | ||
1122 | /** | |
1123 | * snd_rawmidi_transmit - copy from the buffer to the device | |
1124 | * @substream: the rawmidi substream | |
df8db936 | 1125 | * @buffer: the buffer pointer |
1da177e4 LT |
1126 | * @count: the data size to transfer |
1127 | * | |
1128 | * Copies data from the buffer to the device and advances the pointer. | |
1129 | * | |
1130 | * Returns the copied size if successful, or a negative error code on failure. | |
1131 | */ | |
48c9d417 TI |
1132 | int snd_rawmidi_transmit(struct snd_rawmidi_substream *substream, |
1133 | unsigned char *buffer, int count) | |
1da177e4 LT |
1134 | { |
1135 | count = snd_rawmidi_transmit_peek(substream, buffer, count); | |
1136 | if (count < 0) | |
1137 | return count; | |
1138 | return snd_rawmidi_transmit_ack(substream, count); | |
1139 | } | |
1140 | ||
48c9d417 TI |
1141 | static long snd_rawmidi_kernel_write1(struct snd_rawmidi_substream *substream, |
1142 | const unsigned char *buf, long count, int kernel) | |
1da177e4 LT |
1143 | { |
1144 | unsigned long flags; | |
1145 | long count1, result; | |
48c9d417 | 1146 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
1da177e4 LT |
1147 | |
1148 | snd_assert(buf != NULL, return -EINVAL); | |
1149 | snd_assert(runtime->buffer != NULL, return -EINVAL); | |
1150 | ||
1151 | result = 0; | |
1152 | spin_lock_irqsave(&runtime->lock, flags); | |
1153 | if (substream->append) { | |
1154 | if ((long)runtime->avail < count) { | |
1155 | spin_unlock_irqrestore(&runtime->lock, flags); | |
1156 | return -EAGAIN; | |
1157 | } | |
1158 | } | |
1159 | while (count > 0 && runtime->avail > 0) { | |
1160 | count1 = runtime->buffer_size - runtime->appl_ptr; | |
1161 | if (count1 > count) | |
1162 | count1 = count; | |
1163 | if (count1 > (long)runtime->avail) | |
1164 | count1 = runtime->avail; | |
1165 | if (kernel) { | |
1166 | memcpy(runtime->buffer + runtime->appl_ptr, buf, count1); | |
1167 | } else { | |
1168 | spin_unlock_irqrestore(&runtime->lock, flags); | |
1169 | if (copy_from_user(runtime->buffer + runtime->appl_ptr, | |
1170 | (char __user *)buf, count1)) { | |
1171 | spin_lock_irqsave(&runtime->lock, flags); | |
1172 | result = result > 0 ? result : -EFAULT; | |
1173 | goto __end; | |
1174 | } | |
1175 | spin_lock_irqsave(&runtime->lock, flags); | |
1176 | } | |
1177 | runtime->appl_ptr += count1; | |
1178 | runtime->appl_ptr %= runtime->buffer_size; | |
1179 | runtime->avail -= count1; | |
1180 | result += count1; | |
1181 | buf += count1; | |
1182 | count -= count1; | |
1183 | } | |
1184 | __end: | |
1185 | count1 = runtime->avail < runtime->buffer_size; | |
1186 | spin_unlock_irqrestore(&runtime->lock, flags); | |
1187 | if (count1) | |
1188 | snd_rawmidi_output_trigger(substream, 1); | |
1189 | return result; | |
1190 | } | |
1191 | ||
48c9d417 TI |
1192 | long snd_rawmidi_kernel_write(struct snd_rawmidi_substream *substream, |
1193 | const unsigned char *buf, long count) | |
1da177e4 LT |
1194 | { |
1195 | return snd_rawmidi_kernel_write1(substream, buf, count, 1); | |
1196 | } | |
1197 | ||
48c9d417 TI |
1198 | static ssize_t snd_rawmidi_write(struct file *file, const char __user *buf, |
1199 | size_t count, loff_t *offset) | |
1da177e4 LT |
1200 | { |
1201 | long result, timeout; | |
1202 | int count1; | |
48c9d417 TI |
1203 | struct snd_rawmidi_file *rfile; |
1204 | struct snd_rawmidi_runtime *runtime; | |
1205 | struct snd_rawmidi_substream *substream; | |
1da177e4 LT |
1206 | |
1207 | rfile = file->private_data; | |
1208 | substream = rfile->output; | |
1209 | runtime = substream->runtime; | |
1210 | /* we cannot put an atomic message to our buffer */ | |
1211 | if (substream->append && count > runtime->buffer_size) | |
1212 | return -EIO; | |
1213 | result = 0; | |
1214 | while (count > 0) { | |
1215 | spin_lock_irq(&runtime->lock); | |
1216 | while (!snd_rawmidi_ready_append(substream, count)) { | |
1217 | wait_queue_t wait; | |
1218 | if (file->f_flags & O_NONBLOCK) { | |
1219 | spin_unlock_irq(&runtime->lock); | |
1220 | return result > 0 ? result : -EAGAIN; | |
1221 | } | |
1222 | init_waitqueue_entry(&wait, current); | |
1223 | add_wait_queue(&runtime->sleep, &wait); | |
1224 | set_current_state(TASK_INTERRUPTIBLE); | |
1225 | spin_unlock_irq(&runtime->lock); | |
1226 | timeout = schedule_timeout(30 * HZ); | |
1227 | remove_wait_queue(&runtime->sleep, &wait); | |
1228 | if (signal_pending(current)) | |
1229 | return result > 0 ? result : -ERESTARTSYS; | |
1230 | if (!runtime->avail && !timeout) | |
1231 | return result > 0 ? result : -EIO; | |
1232 | spin_lock_irq(&runtime->lock); | |
1233 | } | |
1234 | spin_unlock_irq(&runtime->lock); | |
4d23359b CL |
1235 | count1 = snd_rawmidi_kernel_write1(substream, |
1236 | (unsigned char __force *)buf, | |
1237 | count, 0); | |
1da177e4 LT |
1238 | if (count1 < 0) |
1239 | return result > 0 ? result : count1; | |
1240 | result += count1; | |
1241 | buf += count1; | |
1242 | if ((size_t)count1 < count && (file->f_flags & O_NONBLOCK)) | |
1243 | break; | |
1244 | count -= count1; | |
1245 | } | |
1246 | if (file->f_flags & O_SYNC) { | |
1247 | spin_lock_irq(&runtime->lock); | |
1248 | while (runtime->avail != runtime->buffer_size) { | |
1249 | wait_queue_t wait; | |
1250 | unsigned int last_avail = runtime->avail; | |
1251 | init_waitqueue_entry(&wait, current); | |
1252 | add_wait_queue(&runtime->sleep, &wait); | |
1253 | set_current_state(TASK_INTERRUPTIBLE); | |
1254 | spin_unlock_irq(&runtime->lock); | |
1255 | timeout = schedule_timeout(30 * HZ); | |
1256 | remove_wait_queue(&runtime->sleep, &wait); | |
1257 | if (signal_pending(current)) | |
1258 | return result > 0 ? result : -ERESTARTSYS; | |
1259 | if (runtime->avail == last_avail && !timeout) | |
1260 | return result > 0 ? result : -EIO; | |
1261 | spin_lock_irq(&runtime->lock); | |
1262 | } | |
1263 | spin_unlock_irq(&runtime->lock); | |
1264 | } | |
1265 | return result; | |
1266 | } | |
1267 | ||
1268 | static unsigned int snd_rawmidi_poll(struct file *file, poll_table * wait) | |
1269 | { | |
48c9d417 TI |
1270 | struct snd_rawmidi_file *rfile; |
1271 | struct snd_rawmidi_runtime *runtime; | |
1da177e4 LT |
1272 | unsigned int mask; |
1273 | ||
1274 | rfile = file->private_data; | |
1275 | if (rfile->input != NULL) { | |
1276 | runtime = rfile->input->runtime; | |
1277 | snd_rawmidi_input_trigger(rfile->input, 1); | |
1278 | poll_wait(file, &runtime->sleep, wait); | |
1279 | } | |
1280 | if (rfile->output != NULL) { | |
1281 | runtime = rfile->output->runtime; | |
1282 | poll_wait(file, &runtime->sleep, wait); | |
1283 | } | |
1284 | mask = 0; | |
1285 | if (rfile->input != NULL) { | |
1286 | if (snd_rawmidi_ready(rfile->input)) | |
1287 | mask |= POLLIN | POLLRDNORM; | |
1288 | } | |
1289 | if (rfile->output != NULL) { | |
1290 | if (snd_rawmidi_ready(rfile->output)) | |
1291 | mask |= POLLOUT | POLLWRNORM; | |
1292 | } | |
1293 | return mask; | |
1294 | } | |
1295 | ||
1296 | /* | |
1297 | */ | |
1298 | #ifdef CONFIG_COMPAT | |
1299 | #include "rawmidi_compat.c" | |
1300 | #else | |
1301 | #define snd_rawmidi_ioctl_compat NULL | |
1302 | #endif | |
1303 | ||
1304 | /* | |
1305 | ||
1306 | */ | |
1307 | ||
48c9d417 TI |
1308 | static void snd_rawmidi_proc_info_read(struct snd_info_entry *entry, |
1309 | struct snd_info_buffer *buffer) | |
1da177e4 | 1310 | { |
48c9d417 TI |
1311 | struct snd_rawmidi *rmidi; |
1312 | struct snd_rawmidi_substream *substream; | |
1313 | struct snd_rawmidi_runtime *runtime; | |
1da177e4 LT |
1314 | struct list_head *list; |
1315 | ||
1316 | rmidi = entry->private_data; | |
1317 | snd_iprintf(buffer, "%s\n\n", rmidi->name); | |
1a60d4c5 | 1318 | mutex_lock(&rmidi->open_mutex); |
1da177e4 LT |
1319 | if (rmidi->info_flags & SNDRV_RAWMIDI_INFO_OUTPUT) { |
1320 | list_for_each(list, &rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substreams) { | |
48c9d417 | 1321 | substream = list_entry(list, struct snd_rawmidi_substream, list); |
1da177e4 LT |
1322 | snd_iprintf(buffer, |
1323 | "Output %d\n" | |
1324 | " Tx bytes : %lu\n", | |
1325 | substream->number, | |
1326 | (unsigned long) substream->bytes); | |
1327 | if (substream->opened) { | |
1328 | runtime = substream->runtime; | |
1329 | snd_iprintf(buffer, | |
1330 | " Mode : %s\n" | |
1331 | " Buffer size : %lu\n" | |
1332 | " Avail : %lu\n", | |
1333 | runtime->oss ? "OSS compatible" : "native", | |
1334 | (unsigned long) runtime->buffer_size, | |
1335 | (unsigned long) runtime->avail); | |
1336 | } | |
1337 | } | |
1338 | } | |
1339 | if (rmidi->info_flags & SNDRV_RAWMIDI_INFO_INPUT) { | |
1340 | list_for_each(list, &rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substreams) { | |
48c9d417 | 1341 | substream = list_entry(list, struct snd_rawmidi_substream, list); |
1da177e4 LT |
1342 | snd_iprintf(buffer, |
1343 | "Input %d\n" | |
1344 | " Rx bytes : %lu\n", | |
1345 | substream->number, | |
1346 | (unsigned long) substream->bytes); | |
1347 | if (substream->opened) { | |
1348 | runtime = substream->runtime; | |
1349 | snd_iprintf(buffer, | |
1350 | " Buffer size : %lu\n" | |
1351 | " Avail : %lu\n" | |
1352 | " Overruns : %lu\n", | |
1353 | (unsigned long) runtime->buffer_size, | |
1354 | (unsigned long) runtime->avail, | |
1355 | (unsigned long) runtime->xruns); | |
1356 | } | |
1357 | } | |
1358 | } | |
1a60d4c5 | 1359 | mutex_unlock(&rmidi->open_mutex); |
1da177e4 LT |
1360 | } |
1361 | ||
1362 | /* | |
1363 | * Register functions | |
1364 | */ | |
1365 | ||
1366 | static struct file_operations snd_rawmidi_f_ops = | |
1367 | { | |
1368 | .owner = THIS_MODULE, | |
1369 | .read = snd_rawmidi_read, | |
1370 | .write = snd_rawmidi_write, | |
1371 | .open = snd_rawmidi_open, | |
1372 | .release = snd_rawmidi_release, | |
1373 | .poll = snd_rawmidi_poll, | |
1374 | .unlocked_ioctl = snd_rawmidi_ioctl, | |
1375 | .compat_ioctl = snd_rawmidi_ioctl_compat, | |
1376 | }; | |
1377 | ||
48c9d417 TI |
1378 | static int snd_rawmidi_alloc_substreams(struct snd_rawmidi *rmidi, |
1379 | struct snd_rawmidi_str *stream, | |
1da177e4 LT |
1380 | int direction, |
1381 | int count) | |
1382 | { | |
48c9d417 | 1383 | struct snd_rawmidi_substream *substream; |
1da177e4 LT |
1384 | int idx; |
1385 | ||
1386 | INIT_LIST_HEAD(&stream->substreams); | |
1387 | for (idx = 0; idx < count; idx++) { | |
ca2c0966 | 1388 | substream = kzalloc(sizeof(*substream), GFP_KERNEL); |
73e77ba0 TI |
1389 | if (substream == NULL) { |
1390 | snd_printk(KERN_ERR "rawmidi: cannot allocate substream\n"); | |
1da177e4 | 1391 | return -ENOMEM; |
73e77ba0 | 1392 | } |
1da177e4 LT |
1393 | substream->stream = direction; |
1394 | substream->number = idx; | |
1395 | substream->rmidi = rmidi; | |
1396 | substream->pstr = stream; | |
1397 | list_add_tail(&substream->list, &stream->substreams); | |
1398 | stream->substream_count++; | |
1399 | } | |
1400 | return 0; | |
1401 | } | |
1402 | ||
1403 | /** | |
1404 | * snd_rawmidi_new - create a rawmidi instance | |
1405 | * @card: the card instance | |
1406 | * @id: the id string | |
1407 | * @device: the device index | |
1408 | * @output_count: the number of output streams | |
1409 | * @input_count: the number of input streams | |
1410 | * @rrawmidi: the pointer to store the new rawmidi instance | |
1411 | * | |
1412 | * Creates a new rawmidi instance. | |
1413 | * Use snd_rawmidi_set_ops() to set the operators to the new instance. | |
1414 | * | |
1415 | * Returns zero if successful, or a negative error code on failure. | |
1416 | */ | |
48c9d417 | 1417 | int snd_rawmidi_new(struct snd_card *card, char *id, int device, |
1da177e4 | 1418 | int output_count, int input_count, |
48c9d417 | 1419 | struct snd_rawmidi ** rrawmidi) |
1da177e4 | 1420 | { |
48c9d417 | 1421 | struct snd_rawmidi *rmidi; |
1da177e4 | 1422 | int err; |
48c9d417 | 1423 | static struct snd_device_ops ops = { |
1da177e4 LT |
1424 | .dev_free = snd_rawmidi_dev_free, |
1425 | .dev_register = snd_rawmidi_dev_register, | |
1426 | .dev_disconnect = snd_rawmidi_dev_disconnect, | |
1427 | .dev_unregister = snd_rawmidi_dev_unregister | |
1428 | }; | |
1429 | ||
1430 | snd_assert(rrawmidi != NULL, return -EINVAL); | |
1431 | *rrawmidi = NULL; | |
1432 | snd_assert(card != NULL, return -ENXIO); | |
ca2c0966 | 1433 | rmidi = kzalloc(sizeof(*rmidi), GFP_KERNEL); |
73e77ba0 TI |
1434 | if (rmidi == NULL) { |
1435 | snd_printk(KERN_ERR "rawmidi: cannot allocate\n"); | |
1da177e4 | 1436 | return -ENOMEM; |
73e77ba0 | 1437 | } |
1da177e4 LT |
1438 | rmidi->card = card; |
1439 | rmidi->device = device; | |
1a60d4c5 | 1440 | mutex_init(&rmidi->open_mutex); |
1da177e4 LT |
1441 | init_waitqueue_head(&rmidi->open_wait); |
1442 | if (id != NULL) | |
1443 | strlcpy(rmidi->id, id, sizeof(rmidi->id)); | |
73e77ba0 TI |
1444 | if ((err = snd_rawmidi_alloc_substreams(rmidi, |
1445 | &rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT], | |
1446 | SNDRV_RAWMIDI_STREAM_INPUT, | |
1447 | input_count)) < 0) { | |
1da177e4 LT |
1448 | snd_rawmidi_free(rmidi); |
1449 | return err; | |
1450 | } | |
73e77ba0 TI |
1451 | if ((err = snd_rawmidi_alloc_substreams(rmidi, |
1452 | &rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT], | |
1453 | SNDRV_RAWMIDI_STREAM_OUTPUT, | |
1454 | output_count)) < 0) { | |
1da177e4 LT |
1455 | snd_rawmidi_free(rmidi); |
1456 | return err; | |
1457 | } | |
1458 | if ((err = snd_device_new(card, SNDRV_DEV_RAWMIDI, rmidi, &ops)) < 0) { | |
1459 | snd_rawmidi_free(rmidi); | |
1460 | return err; | |
1461 | } | |
1462 | *rrawmidi = rmidi; | |
1463 | return 0; | |
1464 | } | |
1465 | ||
48c9d417 | 1466 | static void snd_rawmidi_free_substreams(struct snd_rawmidi_str *stream) |
1da177e4 | 1467 | { |
48c9d417 | 1468 | struct snd_rawmidi_substream *substream; |
1da177e4 LT |
1469 | |
1470 | while (!list_empty(&stream->substreams)) { | |
48c9d417 | 1471 | substream = list_entry(stream->substreams.next, struct snd_rawmidi_substream, list); |
1da177e4 LT |
1472 | list_del(&substream->list); |
1473 | kfree(substream); | |
1474 | } | |
1475 | } | |
1476 | ||
48c9d417 | 1477 | static int snd_rawmidi_free(struct snd_rawmidi *rmidi) |
1da177e4 LT |
1478 | { |
1479 | snd_assert(rmidi != NULL, return -ENXIO); | |
1480 | snd_rawmidi_free_substreams(&rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT]); | |
1481 | snd_rawmidi_free_substreams(&rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT]); | |
1482 | if (rmidi->private_free) | |
1483 | rmidi->private_free(rmidi); | |
1484 | kfree(rmidi); | |
1485 | return 0; | |
1486 | } | |
1487 | ||
48c9d417 | 1488 | static int snd_rawmidi_dev_free(struct snd_device *device) |
1da177e4 | 1489 | { |
48c9d417 | 1490 | struct snd_rawmidi *rmidi = device->device_data; |
1da177e4 LT |
1491 | return snd_rawmidi_free(rmidi); |
1492 | } | |
1493 | ||
1494 | #if defined(CONFIG_SND_SEQUENCER) || (defined(MODULE) && defined(CONFIG_SND_SEQUENCER_MODULE)) | |
48c9d417 | 1495 | static void snd_rawmidi_dev_seq_free(struct snd_seq_device *device) |
1da177e4 | 1496 | { |
48c9d417 | 1497 | struct snd_rawmidi *rmidi = device->private_data; |
1da177e4 LT |
1498 | rmidi->seq_dev = NULL; |
1499 | } | |
1500 | #endif | |
1501 | ||
48c9d417 | 1502 | static int snd_rawmidi_dev_register(struct snd_device *device) |
1da177e4 | 1503 | { |
f87135f5 | 1504 | int err; |
48c9d417 | 1505 | struct snd_info_entry *entry; |
1da177e4 | 1506 | char name[16]; |
48c9d417 | 1507 | struct snd_rawmidi *rmidi = device->device_data; |
1da177e4 LT |
1508 | |
1509 | if (rmidi->device >= SNDRV_RAWMIDI_DEVICES) | |
1510 | return -ENOMEM; | |
1a60d4c5 | 1511 | mutex_lock(®ister_mutex); |
f87135f5 | 1512 | if (snd_rawmidi_search(rmidi->card, rmidi->device)) { |
1a60d4c5 | 1513 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
1514 | return -EBUSY; |
1515 | } | |
f87135f5 | 1516 | list_add_tail(&rmidi->list, &snd_rawmidi_devices); |
1da177e4 LT |
1517 | sprintf(name, "midiC%iD%i", rmidi->card->number, rmidi->device); |
1518 | if ((err = snd_register_device(SNDRV_DEVICE_TYPE_RAWMIDI, | |
1519 | rmidi->card, rmidi->device, | |
f87135f5 | 1520 | &snd_rawmidi_f_ops, rmidi, name)) < 0) { |
1da177e4 | 1521 | snd_printk(KERN_ERR "unable to register rawmidi device %i:%i\n", rmidi->card->number, rmidi->device); |
f87135f5 | 1522 | list_del(&rmidi->list); |
1a60d4c5 | 1523 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
1524 | return err; |
1525 | } | |
1526 | if (rmidi->ops && rmidi->ops->dev_register && | |
1527 | (err = rmidi->ops->dev_register(rmidi)) < 0) { | |
1528 | snd_unregister_device(SNDRV_DEVICE_TYPE_RAWMIDI, rmidi->card, rmidi->device); | |
f87135f5 | 1529 | list_del(&rmidi->list); |
1a60d4c5 | 1530 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
1531 | return err; |
1532 | } | |
1533 | #ifdef CONFIG_SND_OSSEMUL | |
1534 | rmidi->ossreg = 0; | |
1535 | if ((int)rmidi->device == midi_map[rmidi->card->number]) { | |
1536 | if (snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_MIDI, | |
f87135f5 CL |
1537 | rmidi->card, 0, &snd_rawmidi_f_ops, |
1538 | rmidi, name) < 0) { | |
1da177e4 LT |
1539 | snd_printk(KERN_ERR "unable to register OSS rawmidi device %i:%i\n", rmidi->card->number, 0); |
1540 | } else { | |
1541 | rmidi->ossreg++; | |
1542 | #ifdef SNDRV_OSS_INFO_DEV_MIDI | |
1543 | snd_oss_info_register(SNDRV_OSS_INFO_DEV_MIDI, rmidi->card->number, rmidi->name); | |
1544 | #endif | |
1545 | } | |
1546 | } | |
1547 | if ((int)rmidi->device == amidi_map[rmidi->card->number]) { | |
1548 | if (snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_MIDI, | |
f87135f5 CL |
1549 | rmidi->card, 1, &snd_rawmidi_f_ops, |
1550 | rmidi, name) < 0) { | |
1da177e4 LT |
1551 | snd_printk(KERN_ERR "unable to register OSS rawmidi device %i:%i\n", rmidi->card->number, 1); |
1552 | } else { | |
1553 | rmidi->ossreg++; | |
1554 | } | |
1555 | } | |
1556 | #endif /* CONFIG_SND_OSSEMUL */ | |
1a60d4c5 | 1557 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
1558 | sprintf(name, "midi%d", rmidi->device); |
1559 | entry = snd_info_create_card_entry(rmidi->card, name, rmidi->card->proc_root); | |
1560 | if (entry) { | |
1561 | entry->private_data = rmidi; | |
1562 | entry->c.text.read_size = 1024; | |
1563 | entry->c.text.read = snd_rawmidi_proc_info_read; | |
1564 | if (snd_info_register(entry) < 0) { | |
1565 | snd_info_free_entry(entry); | |
1566 | entry = NULL; | |
1567 | } | |
1568 | } | |
1569 | rmidi->proc_entry = entry; | |
1570 | #if defined(CONFIG_SND_SEQUENCER) || (defined(MODULE) && defined(CONFIG_SND_SEQUENCER_MODULE)) | |
1571 | if (!rmidi->ops || !rmidi->ops->dev_register) { /* own registration mechanism */ | |
1572 | if (snd_seq_device_new(rmidi->card, rmidi->device, SNDRV_SEQ_DEV_ID_MIDISYNTH, 0, &rmidi->seq_dev) >= 0) { | |
1573 | rmidi->seq_dev->private_data = rmidi; | |
1574 | rmidi->seq_dev->private_free = snd_rawmidi_dev_seq_free; | |
1575 | sprintf(rmidi->seq_dev->name, "MIDI %d-%d", rmidi->card->number, rmidi->device); | |
1576 | snd_device_register(rmidi->card, rmidi->seq_dev); | |
1577 | } | |
1578 | } | |
1579 | #endif | |
1580 | return 0; | |
1581 | } | |
1582 | ||
48c9d417 | 1583 | static int snd_rawmidi_dev_disconnect(struct snd_device *device) |
1da177e4 | 1584 | { |
48c9d417 | 1585 | struct snd_rawmidi *rmidi = device->device_data; |
1da177e4 | 1586 | |
1a60d4c5 | 1587 | mutex_lock(®ister_mutex); |
f87135f5 | 1588 | list_del_init(&rmidi->list); |
1a60d4c5 | 1589 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
1590 | return 0; |
1591 | } | |
1592 | ||
48c9d417 | 1593 | static int snd_rawmidi_dev_unregister(struct snd_device *device) |
1da177e4 | 1594 | { |
48c9d417 | 1595 | struct snd_rawmidi *rmidi = device->device_data; |
1da177e4 LT |
1596 | |
1597 | snd_assert(rmidi != NULL, return -ENXIO); | |
1a60d4c5 | 1598 | mutex_lock(®ister_mutex); |
f87135f5 | 1599 | list_del(&rmidi->list); |
1da177e4 LT |
1600 | if (rmidi->proc_entry) { |
1601 | snd_info_unregister(rmidi->proc_entry); | |
1602 | rmidi->proc_entry = NULL; | |
1603 | } | |
1604 | #ifdef CONFIG_SND_OSSEMUL | |
1605 | if (rmidi->ossreg) { | |
1606 | if ((int)rmidi->device == midi_map[rmidi->card->number]) { | |
1607 | snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_MIDI, rmidi->card, 0); | |
1608 | #ifdef SNDRV_OSS_INFO_DEV_MIDI | |
1609 | snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_MIDI, rmidi->card->number); | |
1610 | #endif | |
1611 | } | |
1612 | if ((int)rmidi->device == amidi_map[rmidi->card->number]) | |
1613 | snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_MIDI, rmidi->card, 1); | |
1614 | rmidi->ossreg = 0; | |
1615 | } | |
1616 | #endif /* CONFIG_SND_OSSEMUL */ | |
1617 | if (rmidi->ops && rmidi->ops->dev_unregister) | |
1618 | rmidi->ops->dev_unregister(rmidi); | |
1619 | snd_unregister_device(SNDRV_DEVICE_TYPE_RAWMIDI, rmidi->card, rmidi->device); | |
1a60d4c5 | 1620 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
1621 | #if defined(CONFIG_SND_SEQUENCER) || (defined(MODULE) && defined(CONFIG_SND_SEQUENCER_MODULE)) |
1622 | if (rmidi->seq_dev) { | |
1623 | snd_device_free(rmidi->card, rmidi->seq_dev); | |
1624 | rmidi->seq_dev = NULL; | |
1625 | } | |
1626 | #endif | |
1627 | return snd_rawmidi_free(rmidi); | |
1628 | } | |
1629 | ||
1630 | /** | |
1631 | * snd_rawmidi_set_ops - set the rawmidi operators | |
1632 | * @rmidi: the rawmidi instance | |
1633 | * @stream: the stream direction, SNDRV_RAWMIDI_STREAM_XXX | |
1634 | * @ops: the operator table | |
1635 | * | |
1636 | * Sets the rawmidi operators for the given stream direction. | |
1637 | */ | |
48c9d417 TI |
1638 | void snd_rawmidi_set_ops(struct snd_rawmidi *rmidi, int stream, |
1639 | struct snd_rawmidi_ops *ops) | |
1da177e4 LT |
1640 | { |
1641 | struct list_head *list; | |
48c9d417 | 1642 | struct snd_rawmidi_substream *substream; |
1da177e4 LT |
1643 | |
1644 | list_for_each(list, &rmidi->streams[stream].substreams) { | |
48c9d417 | 1645 | substream = list_entry(list, struct snd_rawmidi_substream, list); |
1da177e4 LT |
1646 | substream->ops = ops; |
1647 | } | |
1648 | } | |
1649 | ||
1650 | /* | |
1651 | * ENTRY functions | |
1652 | */ | |
1653 | ||
1654 | static int __init alsa_rawmidi_init(void) | |
1655 | { | |
1656 | ||
1657 | snd_ctl_register_ioctl(snd_rawmidi_control_ioctl); | |
1658 | snd_ctl_register_ioctl_compat(snd_rawmidi_control_ioctl); | |
1659 | #ifdef CONFIG_SND_OSSEMUL | |
1660 | { int i; | |
1661 | /* check device map table */ | |
1662 | for (i = 0; i < SNDRV_CARDS; i++) { | |
1663 | if (midi_map[i] < 0 || midi_map[i] >= SNDRV_RAWMIDI_DEVICES) { | |
1664 | snd_printk(KERN_ERR "invalid midi_map[%d] = %d\n", i, midi_map[i]); | |
1665 | midi_map[i] = 0; | |
1666 | } | |
1667 | if (amidi_map[i] < 0 || amidi_map[i] >= SNDRV_RAWMIDI_DEVICES) { | |
1668 | snd_printk(KERN_ERR "invalid amidi_map[%d] = %d\n", i, amidi_map[i]); | |
1669 | amidi_map[i] = 1; | |
1670 | } | |
1671 | } | |
1672 | } | |
1673 | #endif /* CONFIG_SND_OSSEMUL */ | |
1674 | return 0; | |
1675 | } | |
1676 | ||
1677 | static void __exit alsa_rawmidi_exit(void) | |
1678 | { | |
1679 | snd_ctl_unregister_ioctl(snd_rawmidi_control_ioctl); | |
1680 | snd_ctl_unregister_ioctl_compat(snd_rawmidi_control_ioctl); | |
1681 | } | |
1682 | ||
1683 | module_init(alsa_rawmidi_init) | |
1684 | module_exit(alsa_rawmidi_exit) | |
1685 | ||
1686 | EXPORT_SYMBOL(snd_rawmidi_output_params); | |
1687 | EXPORT_SYMBOL(snd_rawmidi_input_params); | |
1688 | EXPORT_SYMBOL(snd_rawmidi_drop_output); | |
1689 | EXPORT_SYMBOL(snd_rawmidi_drain_output); | |
1690 | EXPORT_SYMBOL(snd_rawmidi_drain_input); | |
1691 | EXPORT_SYMBOL(snd_rawmidi_receive); | |
1692 | EXPORT_SYMBOL(snd_rawmidi_transmit_empty); | |
1693 | EXPORT_SYMBOL(snd_rawmidi_transmit_peek); | |
1694 | EXPORT_SYMBOL(snd_rawmidi_transmit_ack); | |
1695 | EXPORT_SYMBOL(snd_rawmidi_transmit); | |
1696 | EXPORT_SYMBOL(snd_rawmidi_new); | |
1697 | EXPORT_SYMBOL(snd_rawmidi_set_ops); | |
1da177e4 LT |
1698 | EXPORT_SYMBOL(snd_rawmidi_info_select); |
1699 | EXPORT_SYMBOL(snd_rawmidi_kernel_open); | |
1700 | EXPORT_SYMBOL(snd_rawmidi_kernel_release); | |
1701 | EXPORT_SYMBOL(snd_rawmidi_kernel_read); | |
1702 | EXPORT_SYMBOL(snd_rawmidi_kernel_write); |