Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * Abstract layer for MIDI v1.0 stream | |
c1017a4c | 3 | * Copyright (c) by Jaroslav Kysela <perex@perex.cz> |
1da177e4 LT |
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> | |
1da177e4 LT |
26 | #include <linux/sched.h> |
27 | #include <linux/slab.h> | |
28 | #include <linux/time.h> | |
29 | #include <linux/wait.h> | |
1a60d4c5 | 30 | #include <linux/mutex.h> |
1da177e4 LT |
31 | #include <linux/moduleparam.h> |
32 | #include <linux/delay.h> | |
1da177e4 LT |
33 | #include <sound/rawmidi.h> |
34 | #include <sound/info.h> | |
35 | #include <sound/control.h> | |
36 | #include <sound/minors.h> | |
37 | #include <sound/initval.h> | |
38 | ||
c1017a4c | 39 | MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>"); |
1da177e4 LT |
40 | MODULE_DESCRIPTION("Midlevel RawMidi code for ALSA."); |
41 | MODULE_LICENSE("GPL"); | |
42 | ||
43 | #ifdef CONFIG_SND_OSSEMUL | |
6581f4e7 | 44 | static int midi_map[SNDRV_CARDS]; |
1da177e4 LT |
45 | static int amidi_map[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS-1)] = 1}; |
46 | module_param_array(midi_map, int, NULL, 0444); | |
47 | MODULE_PARM_DESC(midi_map, "Raw MIDI device number assigned to 1st OSS device."); | |
48 | module_param_array(amidi_map, int, NULL, 0444); | |
49 | MODULE_PARM_DESC(amidi_map, "Raw MIDI device number assigned to 2nd OSS device."); | |
50 | #endif /* CONFIG_SND_OSSEMUL */ | |
51 | ||
48c9d417 TI |
52 | static int snd_rawmidi_free(struct snd_rawmidi *rawmidi); |
53 | static int snd_rawmidi_dev_free(struct snd_device *device); | |
54 | static int snd_rawmidi_dev_register(struct snd_device *device); | |
55 | static int snd_rawmidi_dev_disconnect(struct snd_device *device); | |
1da177e4 | 56 | |
f87135f5 | 57 | static LIST_HEAD(snd_rawmidi_devices); |
1a60d4c5 | 58 | static DEFINE_MUTEX(register_mutex); |
1da177e4 | 59 | |
f87135f5 CL |
60 | static struct snd_rawmidi *snd_rawmidi_search(struct snd_card *card, int device) |
61 | { | |
f87135f5 CL |
62 | struct snd_rawmidi *rawmidi; |
63 | ||
9244b2c3 | 64 | list_for_each_entry(rawmidi, &snd_rawmidi_devices, list) |
f87135f5 CL |
65 | if (rawmidi->card == card && rawmidi->device == device) |
66 | return rawmidi; | |
f87135f5 CL |
67 | return NULL; |
68 | } | |
69 | ||
1da177e4 LT |
70 | static inline unsigned short snd_rawmidi_file_flags(struct file *file) |
71 | { | |
72 | switch (file->f_mode & (FMODE_READ | FMODE_WRITE)) { | |
73 | case FMODE_WRITE: | |
74 | return SNDRV_RAWMIDI_LFLG_OUTPUT; | |
75 | case FMODE_READ: | |
76 | return SNDRV_RAWMIDI_LFLG_INPUT; | |
77 | default: | |
78 | return SNDRV_RAWMIDI_LFLG_OPEN; | |
79 | } | |
80 | } | |
81 | ||
48c9d417 | 82 | static inline int snd_rawmidi_ready(struct snd_rawmidi_substream *substream) |
1da177e4 | 83 | { |
48c9d417 | 84 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
1da177e4 LT |
85 | return runtime->avail >= runtime->avail_min; |
86 | } | |
87 | ||
48c9d417 TI |
88 | static inline int snd_rawmidi_ready_append(struct snd_rawmidi_substream *substream, |
89 | size_t count) | |
1da177e4 | 90 | { |
48c9d417 | 91 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
1da177e4 LT |
92 | return runtime->avail >= runtime->avail_min && |
93 | (!substream->append || runtime->avail >= count); | |
94 | } | |
95 | ||
96 | static void snd_rawmidi_input_event_tasklet(unsigned long data) | |
97 | { | |
48c9d417 | 98 | struct snd_rawmidi_substream *substream = (struct snd_rawmidi_substream *)data; |
1da177e4 LT |
99 | substream->runtime->event(substream); |
100 | } | |
101 | ||
102 | static void snd_rawmidi_output_trigger_tasklet(unsigned long data) | |
103 | { | |
48c9d417 | 104 | struct snd_rawmidi_substream *substream = (struct snd_rawmidi_substream *)data; |
1da177e4 LT |
105 | substream->ops->trigger(substream, 1); |
106 | } | |
107 | ||
48c9d417 | 108 | static int snd_rawmidi_runtime_create(struct snd_rawmidi_substream *substream) |
1da177e4 | 109 | { |
48c9d417 | 110 | struct snd_rawmidi_runtime *runtime; |
1da177e4 | 111 | |
ca2c0966 | 112 | if ((runtime = kzalloc(sizeof(*runtime), GFP_KERNEL)) == NULL) |
1da177e4 LT |
113 | return -ENOMEM; |
114 | spin_lock_init(&runtime->lock); | |
115 | init_waitqueue_head(&runtime->sleep); | |
116 | if (substream->stream == SNDRV_RAWMIDI_STREAM_INPUT) | |
117 | tasklet_init(&runtime->tasklet, | |
118 | snd_rawmidi_input_event_tasklet, | |
119 | (unsigned long)substream); | |
120 | else | |
121 | tasklet_init(&runtime->tasklet, | |
122 | snd_rawmidi_output_trigger_tasklet, | |
123 | (unsigned long)substream); | |
124 | runtime->event = NULL; | |
125 | runtime->buffer_size = PAGE_SIZE; | |
126 | runtime->avail_min = 1; | |
127 | if (substream->stream == SNDRV_RAWMIDI_STREAM_INPUT) | |
128 | runtime->avail = 0; | |
129 | else | |
130 | runtime->avail = runtime->buffer_size; | |
131 | if ((runtime->buffer = kmalloc(runtime->buffer_size, GFP_KERNEL)) == NULL) { | |
132 | kfree(runtime); | |
133 | return -ENOMEM; | |
134 | } | |
135 | runtime->appl_ptr = runtime->hw_ptr = 0; | |
136 | substream->runtime = runtime; | |
137 | return 0; | |
138 | } | |
139 | ||
48c9d417 | 140 | static int snd_rawmidi_runtime_free(struct snd_rawmidi_substream *substream) |
1da177e4 | 141 | { |
48c9d417 | 142 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
1da177e4 LT |
143 | |
144 | kfree(runtime->buffer); | |
145 | kfree(runtime); | |
146 | substream->runtime = NULL; | |
147 | return 0; | |
148 | } | |
149 | ||
48c9d417 | 150 | static inline void snd_rawmidi_output_trigger(struct snd_rawmidi_substream *substream,int up) |
1da177e4 LT |
151 | { |
152 | if (up) { | |
153 | tasklet_hi_schedule(&substream->runtime->tasklet); | |
154 | } else { | |
155 | tasklet_kill(&substream->runtime->tasklet); | |
156 | substream->ops->trigger(substream, 0); | |
157 | } | |
158 | } | |
159 | ||
48c9d417 | 160 | static void snd_rawmidi_input_trigger(struct snd_rawmidi_substream *substream, int up) |
1da177e4 LT |
161 | { |
162 | substream->ops->trigger(substream, up); | |
163 | if (!up && substream->runtime->event) | |
164 | tasklet_kill(&substream->runtime->tasklet); | |
165 | } | |
166 | ||
48c9d417 | 167 | int snd_rawmidi_drop_output(struct snd_rawmidi_substream *substream) |
1da177e4 LT |
168 | { |
169 | unsigned long flags; | |
48c9d417 | 170 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
1da177e4 LT |
171 | |
172 | snd_rawmidi_output_trigger(substream, 0); | |
173 | runtime->drain = 0; | |
174 | spin_lock_irqsave(&runtime->lock, flags); | |
175 | runtime->appl_ptr = runtime->hw_ptr = 0; | |
176 | runtime->avail = runtime->buffer_size; | |
177 | spin_unlock_irqrestore(&runtime->lock, flags); | |
178 | return 0; | |
179 | } | |
180 | ||
48c9d417 | 181 | int snd_rawmidi_drain_output(struct snd_rawmidi_substream *substream) |
1da177e4 LT |
182 | { |
183 | int err; | |
184 | long timeout; | |
48c9d417 | 185 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
1da177e4 LT |
186 | |
187 | err = 0; | |
188 | runtime->drain = 1; | |
189 | timeout = wait_event_interruptible_timeout(runtime->sleep, | |
190 | (runtime->avail >= runtime->buffer_size), | |
191 | 10*HZ); | |
192 | if (signal_pending(current)) | |
193 | err = -ERESTARTSYS; | |
194 | if (runtime->avail < runtime->buffer_size && !timeout) { | |
195 | snd_printk(KERN_WARNING "rawmidi drain error (avail = %li, buffer_size = %li)\n", (long)runtime->avail, (long)runtime->buffer_size); | |
196 | err = -EIO; | |
197 | } | |
198 | runtime->drain = 0; | |
199 | if (err != -ERESTARTSYS) { | |
200 | /* we need wait a while to make sure that Tx FIFOs are empty */ | |
201 | if (substream->ops->drain) | |
202 | substream->ops->drain(substream); | |
203 | else | |
204 | msleep(50); | |
205 | snd_rawmidi_drop_output(substream); | |
206 | } | |
207 | return err; | |
208 | } | |
209 | ||
48c9d417 | 210 | int snd_rawmidi_drain_input(struct snd_rawmidi_substream *substream) |
1da177e4 LT |
211 | { |
212 | unsigned long flags; | |
48c9d417 | 213 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
1da177e4 LT |
214 | |
215 | snd_rawmidi_input_trigger(substream, 0); | |
216 | runtime->drain = 0; | |
217 | spin_lock_irqsave(&runtime->lock, flags); | |
218 | runtime->appl_ptr = runtime->hw_ptr = 0; | |
219 | runtime->avail = 0; | |
220 | spin_unlock_irqrestore(&runtime->lock, flags); | |
221 | return 0; | |
222 | } | |
223 | ||
f87135f5 | 224 | int snd_rawmidi_kernel_open(struct snd_card *card, int device, int subdevice, |
48c9d417 | 225 | int mode, struct snd_rawmidi_file * rfile) |
1da177e4 | 226 | { |
48c9d417 | 227 | struct snd_rawmidi *rmidi; |
1da177e4 | 228 | struct list_head *list1, *list2; |
48c9d417 TI |
229 | struct snd_rawmidi_substream *sinput = NULL, *soutput = NULL; |
230 | struct snd_rawmidi_runtime *input = NULL, *output = NULL; | |
1da177e4 LT |
231 | int err; |
232 | ||
233 | if (rfile) | |
234 | rfile->input = rfile->output = NULL; | |
1a60d4c5 | 235 | mutex_lock(®ister_mutex); |
f87135f5 | 236 | rmidi = snd_rawmidi_search(card, device); |
1a60d4c5 | 237 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
238 | if (rmidi == NULL) { |
239 | err = -ENODEV; | |
240 | goto __error1; | |
241 | } | |
242 | if (!try_module_get(rmidi->card->module)) { | |
243 | err = -EFAULT; | |
244 | goto __error1; | |
245 | } | |
246 | if (!(mode & SNDRV_RAWMIDI_LFLG_NOOPENLOCK)) | |
1a60d4c5 | 247 | mutex_lock(&rmidi->open_mutex); |
1da177e4 LT |
248 | if (mode & SNDRV_RAWMIDI_LFLG_INPUT) { |
249 | if (!(rmidi->info_flags & SNDRV_RAWMIDI_INFO_INPUT)) { | |
250 | err = -ENXIO; | |
251 | goto __error; | |
252 | } | |
253 | if (subdevice >= 0 && (unsigned int)subdevice >= rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substream_count) { | |
254 | err = -ENODEV; | |
255 | goto __error; | |
256 | } | |
257 | if (rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substream_opened >= | |
258 | rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substream_count) { | |
259 | err = -EAGAIN; | |
260 | goto __error; | |
261 | } | |
262 | } | |
263 | if (mode & SNDRV_RAWMIDI_LFLG_OUTPUT) { | |
264 | if (!(rmidi->info_flags & SNDRV_RAWMIDI_INFO_OUTPUT)) { | |
265 | err = -ENXIO; | |
266 | goto __error; | |
267 | } | |
268 | if (subdevice >= 0 && (unsigned int)subdevice >= rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substream_count) { | |
269 | err = -ENODEV; | |
270 | goto __error; | |
271 | } | |
272 | if (rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substream_opened >= | |
273 | rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substream_count) { | |
274 | err = -EAGAIN; | |
275 | goto __error; | |
276 | } | |
277 | } | |
278 | list1 = rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substreams.next; | |
279 | while (1) { | |
280 | if (list1 == &rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substreams) { | |
281 | sinput = NULL; | |
282 | if (mode & SNDRV_RAWMIDI_LFLG_INPUT) { | |
283 | err = -EAGAIN; | |
284 | goto __error; | |
285 | } | |
286 | break; | |
287 | } | |
48c9d417 | 288 | sinput = list_entry(list1, struct snd_rawmidi_substream, list); |
1da177e4 LT |
289 | if ((mode & SNDRV_RAWMIDI_LFLG_INPUT) && sinput->opened) |
290 | goto __nexti; | |
291 | if (subdevice < 0 || (subdevice >= 0 && subdevice == sinput->number)) | |
292 | break; | |
293 | __nexti: | |
294 | list1 = list1->next; | |
295 | } | |
296 | list2 = rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substreams.next; | |
297 | while (1) { | |
298 | if (list2 == &rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substreams) { | |
299 | soutput = NULL; | |
300 | if (mode & SNDRV_RAWMIDI_LFLG_OUTPUT) { | |
301 | err = -EAGAIN; | |
302 | goto __error; | |
303 | } | |
304 | break; | |
305 | } | |
48c9d417 | 306 | soutput = list_entry(list2, struct snd_rawmidi_substream, list); |
1da177e4 LT |
307 | if (mode & SNDRV_RAWMIDI_LFLG_OUTPUT) { |
308 | if (mode & SNDRV_RAWMIDI_LFLG_APPEND) { | |
309 | if (soutput->opened && !soutput->append) | |
310 | goto __nexto; | |
311 | } else { | |
312 | if (soutput->opened) | |
313 | goto __nexto; | |
314 | } | |
315 | } | |
316 | if (subdevice < 0 || (subdevice >= 0 && subdevice == soutput->number)) | |
317 | break; | |
318 | __nexto: | |
319 | list2 = list2->next; | |
320 | } | |
321 | if (mode & SNDRV_RAWMIDI_LFLG_INPUT) { | |
322 | if ((err = snd_rawmidi_runtime_create(sinput)) < 0) | |
323 | goto __error; | |
324 | input = sinput->runtime; | |
325 | if ((err = sinput->ops->open(sinput)) < 0) | |
326 | goto __error; | |
327 | sinput->opened = 1; | |
328 | rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substream_opened++; | |
329 | } else { | |
330 | sinput = NULL; | |
331 | } | |
332 | if (mode & SNDRV_RAWMIDI_LFLG_OUTPUT) { | |
333 | if (soutput->opened) | |
334 | goto __skip_output; | |
335 | if ((err = snd_rawmidi_runtime_create(soutput)) < 0) { | |
336 | if (mode & SNDRV_RAWMIDI_LFLG_INPUT) | |
337 | sinput->ops->close(sinput); | |
338 | goto __error; | |
339 | } | |
340 | output = soutput->runtime; | |
341 | if ((err = soutput->ops->open(soutput)) < 0) { | |
342 | if (mode & SNDRV_RAWMIDI_LFLG_INPUT) | |
343 | sinput->ops->close(sinput); | |
344 | goto __error; | |
345 | } | |
346 | __skip_output: | |
347 | soutput->opened = 1; | |
348 | if (mode & SNDRV_RAWMIDI_LFLG_APPEND) | |
349 | soutput->append = 1; | |
350 | if (soutput->use_count++ == 0) | |
351 | soutput->active_sensing = 1; | |
352 | rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substream_opened++; | |
353 | } else { | |
354 | soutput = NULL; | |
355 | } | |
356 | if (!(mode & SNDRV_RAWMIDI_LFLG_NOOPENLOCK)) | |
1a60d4c5 | 357 | mutex_unlock(&rmidi->open_mutex); |
1da177e4 LT |
358 | if (rfile) { |
359 | rfile->rmidi = rmidi; | |
360 | rfile->input = sinput; | |
361 | rfile->output = soutput; | |
362 | } | |
363 | return 0; | |
364 | ||
365 | __error: | |
366 | if (input != NULL) | |
367 | snd_rawmidi_runtime_free(sinput); | |
368 | if (output != NULL) | |
369 | snd_rawmidi_runtime_free(soutput); | |
370 | module_put(rmidi->card->module); | |
371 | if (!(mode & SNDRV_RAWMIDI_LFLG_NOOPENLOCK)) | |
1a60d4c5 | 372 | mutex_unlock(&rmidi->open_mutex); |
1da177e4 LT |
373 | __error1: |
374 | return err; | |
375 | } | |
376 | ||
377 | static int snd_rawmidi_open(struct inode *inode, struct file *file) | |
378 | { | |
379 | int maj = imajor(inode); | |
48c9d417 | 380 | struct snd_card *card; |
f87135f5 | 381 | int subdevice; |
1da177e4 LT |
382 | unsigned short fflags; |
383 | int err; | |
48c9d417 TI |
384 | struct snd_rawmidi *rmidi; |
385 | struct snd_rawmidi_file *rawmidi_file; | |
1da177e4 | 386 | wait_queue_t wait; |
48c9d417 | 387 | struct snd_ctl_file *kctl; |
1da177e4 | 388 | |
f1902860 | 389 | if (maj == snd_major) { |
f87135f5 CL |
390 | rmidi = snd_lookup_minor_data(iminor(inode), |
391 | SNDRV_DEVICE_TYPE_RAWMIDI); | |
1da177e4 | 392 | #ifdef CONFIG_SND_OSSEMUL |
f1902860 | 393 | } else if (maj == SOUND_MAJOR) { |
f87135f5 CL |
394 | rmidi = snd_lookup_oss_minor_data(iminor(inode), |
395 | SNDRV_OSS_DEVICE_TYPE_MIDI); | |
1da177e4 | 396 | #endif |
f1902860 | 397 | } else |
1da177e4 | 398 | return -ENXIO; |
1da177e4 | 399 | |
1da177e4 LT |
400 | if (rmidi == NULL) |
401 | return -ENODEV; | |
1da177e4 LT |
402 | if ((file->f_flags & O_APPEND) && !(file->f_flags & O_NONBLOCK)) |
403 | return -EINVAL; /* invalid combination */ | |
404 | card = rmidi->card; | |
405 | err = snd_card_file_add(card, file); | |
406 | if (err < 0) | |
407 | return -ENODEV; | |
408 | fflags = snd_rawmidi_file_flags(file); | |
f1902860 | 409 | if ((file->f_flags & O_APPEND) || maj == SOUND_MAJOR) /* OSS emul? */ |
1da177e4 LT |
410 | fflags |= SNDRV_RAWMIDI_LFLG_APPEND; |
411 | fflags |= SNDRV_RAWMIDI_LFLG_NOOPENLOCK; | |
412 | rawmidi_file = kmalloc(sizeof(*rawmidi_file), GFP_KERNEL); | |
413 | if (rawmidi_file == NULL) { | |
414 | snd_card_file_remove(card, file); | |
415 | return -ENOMEM; | |
416 | } | |
417 | init_waitqueue_entry(&wait, current); | |
418 | add_wait_queue(&rmidi->open_wait, &wait); | |
1a60d4c5 | 419 | mutex_lock(&rmidi->open_mutex); |
1da177e4 LT |
420 | while (1) { |
421 | subdevice = -1; | |
422 | down_read(&card->controls_rwsem); | |
9244b2c3 | 423 | list_for_each_entry(kctl, &card->ctl_files, list) { |
1da177e4 LT |
424 | if (kctl->pid == current->pid) { |
425 | subdevice = kctl->prefer_rawmidi_subdevice; | |
2529bba7 TI |
426 | if (subdevice != -1) |
427 | break; | |
1da177e4 LT |
428 | } |
429 | } | |
430 | up_read(&card->controls_rwsem); | |
f87135f5 CL |
431 | err = snd_rawmidi_kernel_open(rmidi->card, rmidi->device, |
432 | subdevice, fflags, rawmidi_file); | |
1da177e4 LT |
433 | if (err >= 0) |
434 | break; | |
435 | if (err == -EAGAIN) { | |
436 | if (file->f_flags & O_NONBLOCK) { | |
437 | err = -EBUSY; | |
438 | break; | |
439 | } | |
440 | } else | |
441 | break; | |
442 | set_current_state(TASK_INTERRUPTIBLE); | |
1a60d4c5 | 443 | mutex_unlock(&rmidi->open_mutex); |
1da177e4 | 444 | schedule(); |
1a60d4c5 | 445 | mutex_lock(&rmidi->open_mutex); |
1da177e4 LT |
446 | if (signal_pending(current)) { |
447 | err = -ERESTARTSYS; | |
448 | break; | |
449 | } | |
450 | } | |
451 | #ifdef CONFIG_SND_OSSEMUL | |
452 | if (rawmidi_file->input && rawmidi_file->input->runtime) | |
453 | rawmidi_file->input->runtime->oss = (maj == SOUND_MAJOR); | |
454 | if (rawmidi_file->output && rawmidi_file->output->runtime) | |
455 | rawmidi_file->output->runtime->oss = (maj == SOUND_MAJOR); | |
456 | #endif | |
457 | remove_wait_queue(&rmidi->open_wait, &wait); | |
458 | if (err >= 0) { | |
459 | file->private_data = rawmidi_file; | |
460 | } else { | |
461 | snd_card_file_remove(card, file); | |
462 | kfree(rawmidi_file); | |
463 | } | |
1a60d4c5 | 464 | mutex_unlock(&rmidi->open_mutex); |
1da177e4 LT |
465 | return err; |
466 | } | |
467 | ||
48c9d417 | 468 | int snd_rawmidi_kernel_release(struct snd_rawmidi_file * rfile) |
1da177e4 | 469 | { |
48c9d417 TI |
470 | struct snd_rawmidi *rmidi; |
471 | struct snd_rawmidi_substream *substream; | |
472 | struct snd_rawmidi_runtime *runtime; | |
1da177e4 LT |
473 | |
474 | snd_assert(rfile != NULL, return -ENXIO); | |
475 | snd_assert(rfile->input != NULL || rfile->output != NULL, return -ENXIO); | |
476 | rmidi = rfile->rmidi; | |
1a60d4c5 | 477 | mutex_lock(&rmidi->open_mutex); |
1da177e4 LT |
478 | if (rfile->input != NULL) { |
479 | substream = rfile->input; | |
480 | rfile->input = NULL; | |
481 | runtime = substream->runtime; | |
482 | snd_rawmidi_input_trigger(substream, 0); | |
483 | substream->ops->close(substream); | |
484 | if (runtime->private_free != NULL) | |
485 | runtime->private_free(substream); | |
486 | snd_rawmidi_runtime_free(substream); | |
487 | substream->opened = 0; | |
488 | rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substream_opened--; | |
489 | } | |
490 | if (rfile->output != NULL) { | |
491 | substream = rfile->output; | |
492 | rfile->output = NULL; | |
493 | if (--substream->use_count == 0) { | |
494 | runtime = substream->runtime; | |
495 | if (substream->active_sensing) { | |
496 | unsigned char buf = 0xfe; | |
497 | /* sending single active sensing message to shut the device up */ | |
498 | snd_rawmidi_kernel_write(substream, &buf, 1); | |
499 | } | |
500 | if (snd_rawmidi_drain_output(substream) == -ERESTARTSYS) | |
501 | snd_rawmidi_output_trigger(substream, 0); | |
502 | substream->ops->close(substream); | |
503 | if (runtime->private_free != NULL) | |
504 | runtime->private_free(substream); | |
505 | snd_rawmidi_runtime_free(substream); | |
506 | substream->opened = 0; | |
507 | substream->append = 0; | |
508 | } | |
509 | rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substream_opened--; | |
510 | } | |
1a60d4c5 | 511 | mutex_unlock(&rmidi->open_mutex); |
1da177e4 LT |
512 | module_put(rmidi->card->module); |
513 | return 0; | |
514 | } | |
515 | ||
516 | static int snd_rawmidi_release(struct inode *inode, struct file *file) | |
517 | { | |
48c9d417 TI |
518 | struct snd_rawmidi_file *rfile; |
519 | struct snd_rawmidi *rmidi; | |
1da177e4 LT |
520 | int err; |
521 | ||
522 | rfile = file->private_data; | |
523 | err = snd_rawmidi_kernel_release(rfile); | |
524 | rmidi = rfile->rmidi; | |
525 | wake_up(&rmidi->open_wait); | |
526 | kfree(rfile); | |
527 | snd_card_file_remove(rmidi->card, file); | |
528 | return err; | |
529 | } | |
530 | ||
18612048 AB |
531 | static int snd_rawmidi_info(struct snd_rawmidi_substream *substream, |
532 | struct snd_rawmidi_info *info) | |
1da177e4 | 533 | { |
48c9d417 | 534 | struct snd_rawmidi *rmidi; |
1da177e4 LT |
535 | |
536 | if (substream == NULL) | |
537 | return -ENODEV; | |
538 | rmidi = substream->rmidi; | |
539 | memset(info, 0, sizeof(*info)); | |
540 | info->card = rmidi->card->number; | |
541 | info->device = rmidi->device; | |
542 | info->subdevice = substream->number; | |
543 | info->stream = substream->stream; | |
544 | info->flags = rmidi->info_flags; | |
545 | strcpy(info->id, rmidi->id); | |
546 | strcpy(info->name, rmidi->name); | |
547 | strcpy(info->subname, substream->name); | |
548 | info->subdevices_count = substream->pstr->substream_count; | |
549 | info->subdevices_avail = (substream->pstr->substream_count - | |
550 | substream->pstr->substream_opened); | |
551 | return 0; | |
552 | } | |
553 | ||
48c9d417 TI |
554 | static int snd_rawmidi_info_user(struct snd_rawmidi_substream *substream, |
555 | struct snd_rawmidi_info __user * _info) | |
1da177e4 | 556 | { |
48c9d417 | 557 | struct snd_rawmidi_info info; |
1da177e4 LT |
558 | int err; |
559 | if ((err = snd_rawmidi_info(substream, &info)) < 0) | |
560 | return err; | |
48c9d417 | 561 | if (copy_to_user(_info, &info, sizeof(struct snd_rawmidi_info))) |
1da177e4 LT |
562 | return -EFAULT; |
563 | return 0; | |
564 | } | |
565 | ||
48c9d417 | 566 | int snd_rawmidi_info_select(struct snd_card *card, struct snd_rawmidi_info *info) |
1da177e4 | 567 | { |
48c9d417 TI |
568 | struct snd_rawmidi *rmidi; |
569 | struct snd_rawmidi_str *pstr; | |
570 | struct snd_rawmidi_substream *substream; | |
f87135f5 | 571 | |
1a60d4c5 | 572 | mutex_lock(®ister_mutex); |
f87135f5 | 573 | rmidi = snd_rawmidi_search(card, info->device); |
1a60d4c5 | 574 | mutex_unlock(®ister_mutex); |
a106cd3d CL |
575 | if (!rmidi) |
576 | return -ENXIO; | |
1da177e4 LT |
577 | if (info->stream < 0 || info->stream > 1) |
578 | return -EINVAL; | |
579 | pstr = &rmidi->streams[info->stream]; | |
580 | if (pstr->substream_count == 0) | |
581 | return -ENOENT; | |
582 | if (info->subdevice >= pstr->substream_count) | |
583 | return -ENXIO; | |
9244b2c3 | 584 | list_for_each_entry(substream, &pstr->substreams, list) { |
1da177e4 LT |
585 | if ((unsigned int)substream->number == info->subdevice) |
586 | return snd_rawmidi_info(substream, info); | |
587 | } | |
588 | return -ENXIO; | |
589 | } | |
590 | ||
48c9d417 TI |
591 | static int snd_rawmidi_info_select_user(struct snd_card *card, |
592 | struct snd_rawmidi_info __user *_info) | |
1da177e4 LT |
593 | { |
594 | int err; | |
48c9d417 | 595 | struct snd_rawmidi_info info; |
1da177e4 LT |
596 | if (get_user(info.device, &_info->device)) |
597 | return -EFAULT; | |
598 | if (get_user(info.stream, &_info->stream)) | |
599 | return -EFAULT; | |
600 | if (get_user(info.subdevice, &_info->subdevice)) | |
601 | return -EFAULT; | |
602 | if ((err = snd_rawmidi_info_select(card, &info)) < 0) | |
603 | return err; | |
48c9d417 | 604 | if (copy_to_user(_info, &info, sizeof(struct snd_rawmidi_info))) |
1da177e4 LT |
605 | return -EFAULT; |
606 | return 0; | |
607 | } | |
608 | ||
48c9d417 TI |
609 | int snd_rawmidi_output_params(struct snd_rawmidi_substream *substream, |
610 | struct snd_rawmidi_params * params) | |
1da177e4 LT |
611 | { |
612 | char *newbuf; | |
48c9d417 | 613 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
1da177e4 LT |
614 | |
615 | if (substream->append && substream->use_count > 1) | |
616 | return -EBUSY; | |
617 | snd_rawmidi_drain_output(substream); | |
618 | if (params->buffer_size < 32 || params->buffer_size > 1024L * 1024L) { | |
619 | return -EINVAL; | |
620 | } | |
621 | if (params->avail_min < 1 || params->avail_min > params->buffer_size) { | |
622 | return -EINVAL; | |
623 | } | |
624 | if (params->buffer_size != runtime->buffer_size) { | |
4fa95ef6 JJ |
625 | newbuf = kmalloc(params->buffer_size, GFP_KERNEL); |
626 | if (!newbuf) | |
1da177e4 LT |
627 | return -ENOMEM; |
628 | kfree(runtime->buffer); | |
629 | runtime->buffer = newbuf; | |
630 | runtime->buffer_size = params->buffer_size; | |
1b98ea47 | 631 | runtime->avail = runtime->buffer_size; |
1da177e4 LT |
632 | } |
633 | runtime->avail_min = params->avail_min; | |
634 | substream->active_sensing = !params->no_active_sensing; | |
635 | return 0; | |
636 | } | |
637 | ||
48c9d417 TI |
638 | int snd_rawmidi_input_params(struct snd_rawmidi_substream *substream, |
639 | struct snd_rawmidi_params * params) | |
1da177e4 LT |
640 | { |
641 | char *newbuf; | |
48c9d417 | 642 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
1da177e4 LT |
643 | |
644 | snd_rawmidi_drain_input(substream); | |
645 | if (params->buffer_size < 32 || params->buffer_size > 1024L * 1024L) { | |
646 | return -EINVAL; | |
647 | } | |
648 | if (params->avail_min < 1 || params->avail_min > params->buffer_size) { | |
649 | return -EINVAL; | |
650 | } | |
651 | if (params->buffer_size != runtime->buffer_size) { | |
4fa95ef6 JJ |
652 | newbuf = kmalloc(params->buffer_size, GFP_KERNEL); |
653 | if (!newbuf) | |
1da177e4 LT |
654 | return -ENOMEM; |
655 | kfree(runtime->buffer); | |
656 | runtime->buffer = newbuf; | |
657 | runtime->buffer_size = params->buffer_size; | |
658 | } | |
659 | runtime->avail_min = params->avail_min; | |
660 | return 0; | |
661 | } | |
662 | ||
48c9d417 TI |
663 | static int snd_rawmidi_output_status(struct snd_rawmidi_substream *substream, |
664 | struct snd_rawmidi_status * status) | |
1da177e4 | 665 | { |
48c9d417 | 666 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
1da177e4 LT |
667 | |
668 | memset(status, 0, sizeof(*status)); | |
669 | status->stream = SNDRV_RAWMIDI_STREAM_OUTPUT; | |
670 | spin_lock_irq(&runtime->lock); | |
671 | status->avail = runtime->avail; | |
672 | spin_unlock_irq(&runtime->lock); | |
673 | return 0; | |
674 | } | |
675 | ||
48c9d417 TI |
676 | static int snd_rawmidi_input_status(struct snd_rawmidi_substream *substream, |
677 | struct snd_rawmidi_status * status) | |
1da177e4 | 678 | { |
48c9d417 | 679 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
1da177e4 LT |
680 | |
681 | memset(status, 0, sizeof(*status)); | |
682 | status->stream = SNDRV_RAWMIDI_STREAM_INPUT; | |
683 | spin_lock_irq(&runtime->lock); | |
684 | status->avail = runtime->avail; | |
685 | status->xruns = runtime->xruns; | |
686 | runtime->xruns = 0; | |
687 | spin_unlock_irq(&runtime->lock); | |
688 | return 0; | |
689 | } | |
690 | ||
691 | static long snd_rawmidi_ioctl(struct file *file, unsigned int cmd, unsigned long arg) | |
692 | { | |
48c9d417 | 693 | struct snd_rawmidi_file *rfile; |
1da177e4 LT |
694 | void __user *argp = (void __user *)arg; |
695 | ||
696 | rfile = file->private_data; | |
697 | if (((cmd >> 8) & 0xff) != 'W') | |
698 | return -ENOTTY; | |
699 | switch (cmd) { | |
700 | case SNDRV_RAWMIDI_IOCTL_PVERSION: | |
701 | return put_user(SNDRV_RAWMIDI_VERSION, (int __user *)argp) ? -EFAULT : 0; | |
702 | case SNDRV_RAWMIDI_IOCTL_INFO: | |
703 | { | |
48c9d417 TI |
704 | int stream; |
705 | struct snd_rawmidi_info __user *info = argp; | |
1da177e4 LT |
706 | if (get_user(stream, &info->stream)) |
707 | return -EFAULT; | |
708 | switch (stream) { | |
709 | case SNDRV_RAWMIDI_STREAM_INPUT: | |
710 | return snd_rawmidi_info_user(rfile->input, info); | |
711 | case SNDRV_RAWMIDI_STREAM_OUTPUT: | |
712 | return snd_rawmidi_info_user(rfile->output, info); | |
713 | default: | |
714 | return -EINVAL; | |
715 | } | |
716 | } | |
717 | case SNDRV_RAWMIDI_IOCTL_PARAMS: | |
718 | { | |
48c9d417 TI |
719 | struct snd_rawmidi_params params; |
720 | if (copy_from_user(¶ms, argp, sizeof(struct snd_rawmidi_params))) | |
1da177e4 LT |
721 | return -EFAULT; |
722 | switch (params.stream) { | |
723 | case SNDRV_RAWMIDI_STREAM_OUTPUT: | |
724 | if (rfile->output == NULL) | |
725 | return -EINVAL; | |
726 | return snd_rawmidi_output_params(rfile->output, ¶ms); | |
727 | case SNDRV_RAWMIDI_STREAM_INPUT: | |
728 | if (rfile->input == NULL) | |
729 | return -EINVAL; | |
730 | return snd_rawmidi_input_params(rfile->input, ¶ms); | |
731 | default: | |
732 | return -EINVAL; | |
733 | } | |
734 | } | |
735 | case SNDRV_RAWMIDI_IOCTL_STATUS: | |
736 | { | |
737 | int err = 0; | |
48c9d417 TI |
738 | struct snd_rawmidi_status status; |
739 | if (copy_from_user(&status, argp, sizeof(struct snd_rawmidi_status))) | |
1da177e4 LT |
740 | return -EFAULT; |
741 | switch (status.stream) { | |
742 | case SNDRV_RAWMIDI_STREAM_OUTPUT: | |
743 | if (rfile->output == NULL) | |
744 | return -EINVAL; | |
745 | err = snd_rawmidi_output_status(rfile->output, &status); | |
746 | break; | |
747 | case SNDRV_RAWMIDI_STREAM_INPUT: | |
748 | if (rfile->input == NULL) | |
749 | return -EINVAL; | |
750 | err = snd_rawmidi_input_status(rfile->input, &status); | |
751 | break; | |
752 | default: | |
753 | return -EINVAL; | |
754 | } | |
755 | if (err < 0) | |
756 | return err; | |
48c9d417 | 757 | if (copy_to_user(argp, &status, sizeof(struct snd_rawmidi_status))) |
1da177e4 LT |
758 | return -EFAULT; |
759 | return 0; | |
760 | } | |
761 | case SNDRV_RAWMIDI_IOCTL_DROP: | |
762 | { | |
763 | int val; | |
764 | if (get_user(val, (int __user *) argp)) | |
765 | return -EFAULT; | |
766 | switch (val) { | |
767 | case SNDRV_RAWMIDI_STREAM_OUTPUT: | |
768 | if (rfile->output == NULL) | |
769 | return -EINVAL; | |
770 | return snd_rawmidi_drop_output(rfile->output); | |
771 | default: | |
772 | return -EINVAL; | |
773 | } | |
774 | } | |
775 | case SNDRV_RAWMIDI_IOCTL_DRAIN: | |
776 | { | |
777 | int val; | |
778 | if (get_user(val, (int __user *) argp)) | |
779 | return -EFAULT; | |
780 | switch (val) { | |
781 | case SNDRV_RAWMIDI_STREAM_OUTPUT: | |
782 | if (rfile->output == NULL) | |
783 | return -EINVAL; | |
784 | return snd_rawmidi_drain_output(rfile->output); | |
785 | case SNDRV_RAWMIDI_STREAM_INPUT: | |
786 | if (rfile->input == NULL) | |
787 | return -EINVAL; | |
788 | return snd_rawmidi_drain_input(rfile->input); | |
789 | default: | |
790 | return -EINVAL; | |
791 | } | |
792 | } | |
793 | #ifdef CONFIG_SND_DEBUG | |
794 | default: | |
795 | snd_printk(KERN_WARNING "rawmidi: unknown command = 0x%x\n", cmd); | |
796 | #endif | |
797 | } | |
798 | return -ENOTTY; | |
799 | } | |
800 | ||
48c9d417 TI |
801 | static int snd_rawmidi_control_ioctl(struct snd_card *card, |
802 | struct snd_ctl_file *control, | |
1da177e4 LT |
803 | unsigned int cmd, |
804 | unsigned long arg) | |
805 | { | |
806 | void __user *argp = (void __user *)arg; | |
1da177e4 | 807 | |
1da177e4 LT |
808 | switch (cmd) { |
809 | case SNDRV_CTL_IOCTL_RAWMIDI_NEXT_DEVICE: | |
810 | { | |
811 | int device; | |
812 | ||
813 | if (get_user(device, (int __user *)argp)) | |
814 | return -EFAULT; | |
1a60d4c5 | 815 | mutex_lock(®ister_mutex); |
1da177e4 LT |
816 | device = device < 0 ? 0 : device + 1; |
817 | while (device < SNDRV_RAWMIDI_DEVICES) { | |
f87135f5 | 818 | if (snd_rawmidi_search(card, device)) |
1da177e4 LT |
819 | break; |
820 | device++; | |
821 | } | |
822 | if (device == SNDRV_RAWMIDI_DEVICES) | |
823 | device = -1; | |
1a60d4c5 | 824 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
825 | if (put_user(device, (int __user *)argp)) |
826 | return -EFAULT; | |
827 | return 0; | |
828 | } | |
829 | case SNDRV_CTL_IOCTL_RAWMIDI_PREFER_SUBDEVICE: | |
830 | { | |
831 | int val; | |
832 | ||
833 | if (get_user(val, (int __user *)argp)) | |
834 | return -EFAULT; | |
835 | control->prefer_rawmidi_subdevice = val; | |
836 | return 0; | |
837 | } | |
838 | case SNDRV_CTL_IOCTL_RAWMIDI_INFO: | |
839 | return snd_rawmidi_info_select_user(card, argp); | |
840 | } | |
841 | return -ENOIOCTLCMD; | |
842 | } | |
843 | ||
844 | /** | |
845 | * snd_rawmidi_receive - receive the input data from the device | |
846 | * @substream: the rawmidi substream | |
847 | * @buffer: the buffer pointer | |
848 | * @count: the data size to read | |
849 | * | |
850 | * Reads the data from the internal buffer. | |
851 | * | |
852 | * Returns the size of read data, or a negative error code on failure. | |
853 | */ | |
48c9d417 TI |
854 | int snd_rawmidi_receive(struct snd_rawmidi_substream *substream, |
855 | const unsigned char *buffer, int count) | |
1da177e4 LT |
856 | { |
857 | unsigned long flags; | |
858 | int result = 0, count1; | |
48c9d417 | 859 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
1da177e4 LT |
860 | |
861 | if (runtime->buffer == NULL) { | |
862 | snd_printd("snd_rawmidi_receive: input is not active!!!\n"); | |
863 | return -EINVAL; | |
864 | } | |
865 | spin_lock_irqsave(&runtime->lock, flags); | |
866 | if (count == 1) { /* special case, faster code */ | |
867 | substream->bytes++; | |
868 | if (runtime->avail < runtime->buffer_size) { | |
869 | runtime->buffer[runtime->hw_ptr++] = buffer[0]; | |
870 | runtime->hw_ptr %= runtime->buffer_size; | |
871 | runtime->avail++; | |
872 | result++; | |
873 | } else { | |
874 | runtime->xruns++; | |
875 | } | |
876 | } else { | |
877 | substream->bytes += count; | |
878 | count1 = runtime->buffer_size - runtime->hw_ptr; | |
879 | if (count1 > count) | |
880 | count1 = count; | |
881 | if (count1 > (int)(runtime->buffer_size - runtime->avail)) | |
882 | count1 = runtime->buffer_size - runtime->avail; | |
883 | memcpy(runtime->buffer + runtime->hw_ptr, buffer, count1); | |
884 | runtime->hw_ptr += count1; | |
885 | runtime->hw_ptr %= runtime->buffer_size; | |
886 | runtime->avail += count1; | |
887 | count -= count1; | |
888 | result += count1; | |
889 | if (count > 0) { | |
890 | buffer += count1; | |
891 | count1 = count; | |
892 | if (count1 > (int)(runtime->buffer_size - runtime->avail)) { | |
893 | count1 = runtime->buffer_size - runtime->avail; | |
894 | runtime->xruns += count - count1; | |
895 | } | |
896 | if (count1 > 0) { | |
897 | memcpy(runtime->buffer, buffer, count1); | |
898 | runtime->hw_ptr = count1; | |
899 | runtime->avail += count1; | |
900 | result += count1; | |
901 | } | |
902 | } | |
903 | } | |
904 | if (result > 0) { | |
905 | if (runtime->event) | |
906 | tasklet_hi_schedule(&runtime->tasklet); | |
907 | else if (snd_rawmidi_ready(substream)) | |
908 | wake_up(&runtime->sleep); | |
909 | } | |
910 | spin_unlock_irqrestore(&runtime->lock, flags); | |
911 | return result; | |
912 | } | |
913 | ||
48c9d417 | 914 | static long snd_rawmidi_kernel_read1(struct snd_rawmidi_substream *substream, |
1da177e4 LT |
915 | unsigned char *buf, long count, int kernel) |
916 | { | |
917 | unsigned long flags; | |
918 | long result = 0, count1; | |
48c9d417 | 919 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
1da177e4 LT |
920 | |
921 | while (count > 0 && runtime->avail) { | |
922 | count1 = runtime->buffer_size - runtime->appl_ptr; | |
923 | if (count1 > count) | |
924 | count1 = count; | |
925 | spin_lock_irqsave(&runtime->lock, flags); | |
926 | if (count1 > (int)runtime->avail) | |
927 | count1 = runtime->avail; | |
928 | if (kernel) { | |
929 | memcpy(buf + result, runtime->buffer + runtime->appl_ptr, count1); | |
930 | } else { | |
931 | spin_unlock_irqrestore(&runtime->lock, flags); | |
932 | if (copy_to_user((char __user *)buf + result, | |
933 | runtime->buffer + runtime->appl_ptr, count1)) { | |
934 | return result > 0 ? result : -EFAULT; | |
935 | } | |
936 | spin_lock_irqsave(&runtime->lock, flags); | |
937 | } | |
938 | runtime->appl_ptr += count1; | |
939 | runtime->appl_ptr %= runtime->buffer_size; | |
940 | runtime->avail -= count1; | |
941 | spin_unlock_irqrestore(&runtime->lock, flags); | |
942 | result += count1; | |
943 | count -= count1; | |
944 | } | |
945 | return result; | |
946 | } | |
947 | ||
48c9d417 TI |
948 | long snd_rawmidi_kernel_read(struct snd_rawmidi_substream *substream, |
949 | unsigned char *buf, long count) | |
1da177e4 LT |
950 | { |
951 | snd_rawmidi_input_trigger(substream, 1); | |
952 | return snd_rawmidi_kernel_read1(substream, buf, count, 1); | |
953 | } | |
954 | ||
48c9d417 TI |
955 | static ssize_t snd_rawmidi_read(struct file *file, char __user *buf, size_t count, |
956 | loff_t *offset) | |
1da177e4 LT |
957 | { |
958 | long result; | |
959 | int count1; | |
48c9d417 TI |
960 | struct snd_rawmidi_file *rfile; |
961 | struct snd_rawmidi_substream *substream; | |
962 | struct snd_rawmidi_runtime *runtime; | |
1da177e4 LT |
963 | |
964 | rfile = file->private_data; | |
965 | substream = rfile->input; | |
966 | if (substream == NULL) | |
967 | return -EIO; | |
968 | runtime = substream->runtime; | |
969 | snd_rawmidi_input_trigger(substream, 1); | |
970 | result = 0; | |
971 | while (count > 0) { | |
972 | spin_lock_irq(&runtime->lock); | |
973 | while (!snd_rawmidi_ready(substream)) { | |
974 | wait_queue_t wait; | |
975 | if ((file->f_flags & O_NONBLOCK) != 0 || result > 0) { | |
976 | spin_unlock_irq(&runtime->lock); | |
977 | return result > 0 ? result : -EAGAIN; | |
978 | } | |
979 | init_waitqueue_entry(&wait, current); | |
980 | add_wait_queue(&runtime->sleep, &wait); | |
981 | set_current_state(TASK_INTERRUPTIBLE); | |
982 | spin_unlock_irq(&runtime->lock); | |
983 | schedule(); | |
984 | remove_wait_queue(&runtime->sleep, &wait); | |
985 | if (signal_pending(current)) | |
986 | return result > 0 ? result : -ERESTARTSYS; | |
987 | if (!runtime->avail) | |
988 | return result > 0 ? result : -EIO; | |
989 | spin_lock_irq(&runtime->lock); | |
990 | } | |
991 | spin_unlock_irq(&runtime->lock); | |
4d23359b CL |
992 | count1 = snd_rawmidi_kernel_read1(substream, |
993 | (unsigned char __force *)buf, | |
994 | count, 0); | |
1da177e4 LT |
995 | if (count1 < 0) |
996 | return result > 0 ? result : count1; | |
997 | result += count1; | |
998 | buf += count1; | |
999 | count -= count1; | |
1000 | } | |
1001 | return result; | |
1002 | } | |
1003 | ||
1004 | /** | |
1005 | * snd_rawmidi_transmit_empty - check whether the output buffer is empty | |
1006 | * @substream: the rawmidi substream | |
1007 | * | |
1008 | * Returns 1 if the internal output buffer is empty, 0 if not. | |
1009 | */ | |
48c9d417 | 1010 | int snd_rawmidi_transmit_empty(struct snd_rawmidi_substream *substream) |
1da177e4 | 1011 | { |
48c9d417 | 1012 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
1da177e4 LT |
1013 | int result; |
1014 | unsigned long flags; | |
1015 | ||
1016 | if (runtime->buffer == NULL) { | |
1017 | snd_printd("snd_rawmidi_transmit_empty: output is not active!!!\n"); | |
1018 | return 1; | |
1019 | } | |
1020 | spin_lock_irqsave(&runtime->lock, flags); | |
1021 | result = runtime->avail >= runtime->buffer_size; | |
1022 | spin_unlock_irqrestore(&runtime->lock, flags); | |
1023 | return result; | |
1024 | } | |
1025 | ||
1026 | /** | |
1027 | * snd_rawmidi_transmit_peek - copy data from the internal buffer | |
1028 | * @substream: the rawmidi substream | |
1029 | * @buffer: the buffer pointer | |
1030 | * @count: data size to transfer | |
1031 | * | |
1032 | * Copies data from the internal output buffer to the given buffer. | |
1033 | * | |
1034 | * Call this in the interrupt handler when the midi output is ready, | |
1035 | * and call snd_rawmidi_transmit_ack() after the transmission is | |
1036 | * finished. | |
1037 | * | |
1038 | * Returns the size of copied data, or a negative error code on failure. | |
1039 | */ | |
48c9d417 TI |
1040 | int snd_rawmidi_transmit_peek(struct snd_rawmidi_substream *substream, |
1041 | unsigned char *buffer, int count) | |
1da177e4 LT |
1042 | { |
1043 | unsigned long flags; | |
1044 | int result, count1; | |
48c9d417 | 1045 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
1da177e4 LT |
1046 | |
1047 | if (runtime->buffer == NULL) { | |
1048 | snd_printd("snd_rawmidi_transmit_peek: output is not active!!!\n"); | |
1049 | return -EINVAL; | |
1050 | } | |
1051 | result = 0; | |
1052 | spin_lock_irqsave(&runtime->lock, flags); | |
1053 | if (runtime->avail >= runtime->buffer_size) { | |
1054 | /* warning: lowlevel layer MUST trigger down the hardware */ | |
1055 | goto __skip; | |
1056 | } | |
1057 | if (count == 1) { /* special case, faster code */ | |
1058 | *buffer = runtime->buffer[runtime->hw_ptr]; | |
1059 | result++; | |
1060 | } else { | |
1061 | count1 = runtime->buffer_size - runtime->hw_ptr; | |
1062 | if (count1 > count) | |
1063 | count1 = count; | |
1064 | if (count1 > (int)(runtime->buffer_size - runtime->avail)) | |
1065 | count1 = runtime->buffer_size - runtime->avail; | |
1066 | memcpy(buffer, runtime->buffer + runtime->hw_ptr, count1); | |
1067 | count -= count1; | |
1068 | result += count1; | |
1069 | if (count > 0) { | |
1070 | if (count > (int)(runtime->buffer_size - runtime->avail - count1)) | |
1071 | count = runtime->buffer_size - runtime->avail - count1; | |
1072 | memcpy(buffer + count1, runtime->buffer, count); | |
1073 | result += count; | |
1074 | } | |
1075 | } | |
1076 | __skip: | |
1077 | spin_unlock_irqrestore(&runtime->lock, flags); | |
1078 | return result; | |
1079 | } | |
1080 | ||
1081 | /** | |
1082 | * snd_rawmidi_transmit_ack - acknowledge the transmission | |
1083 | * @substream: the rawmidi substream | |
1084 | * @count: the tranferred count | |
1085 | * | |
1086 | * Advances the hardware pointer for the internal output buffer with | |
1087 | * the given size and updates the condition. | |
1088 | * Call after the transmission is finished. | |
1089 | * | |
1090 | * Returns the advanced size if successful, or a negative error code on failure. | |
1091 | */ | |
48c9d417 | 1092 | int snd_rawmidi_transmit_ack(struct snd_rawmidi_substream *substream, int count) |
1da177e4 LT |
1093 | { |
1094 | unsigned long flags; | |
48c9d417 | 1095 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
1da177e4 LT |
1096 | |
1097 | if (runtime->buffer == NULL) { | |
1098 | snd_printd("snd_rawmidi_transmit_ack: output is not active!!!\n"); | |
1099 | return -EINVAL; | |
1100 | } | |
1101 | spin_lock_irqsave(&runtime->lock, flags); | |
1102 | snd_assert(runtime->avail + count <= runtime->buffer_size, ); | |
1103 | runtime->hw_ptr += count; | |
1104 | runtime->hw_ptr %= runtime->buffer_size; | |
1105 | runtime->avail += count; | |
1106 | substream->bytes += count; | |
1107 | if (count > 0) { | |
1108 | if (runtime->drain || snd_rawmidi_ready(substream)) | |
1109 | wake_up(&runtime->sleep); | |
1110 | } | |
1111 | spin_unlock_irqrestore(&runtime->lock, flags); | |
1112 | return count; | |
1113 | } | |
1114 | ||
1115 | /** | |
1116 | * snd_rawmidi_transmit - copy from the buffer to the device | |
1117 | * @substream: the rawmidi substream | |
df8db936 | 1118 | * @buffer: the buffer pointer |
1da177e4 LT |
1119 | * @count: the data size to transfer |
1120 | * | |
1121 | * Copies data from the buffer to the device and advances the pointer. | |
1122 | * | |
1123 | * Returns the copied size if successful, or a negative error code on failure. | |
1124 | */ | |
48c9d417 TI |
1125 | int snd_rawmidi_transmit(struct snd_rawmidi_substream *substream, |
1126 | unsigned char *buffer, int count) | |
1da177e4 LT |
1127 | { |
1128 | count = snd_rawmidi_transmit_peek(substream, buffer, count); | |
1129 | if (count < 0) | |
1130 | return count; | |
1131 | return snd_rawmidi_transmit_ack(substream, count); | |
1132 | } | |
1133 | ||
48c9d417 TI |
1134 | static long snd_rawmidi_kernel_write1(struct snd_rawmidi_substream *substream, |
1135 | const unsigned char *buf, long count, int kernel) | |
1da177e4 LT |
1136 | { |
1137 | unsigned long flags; | |
1138 | long count1, result; | |
48c9d417 | 1139 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
1da177e4 LT |
1140 | |
1141 | snd_assert(buf != NULL, return -EINVAL); | |
1142 | snd_assert(runtime->buffer != NULL, return -EINVAL); | |
1143 | ||
1144 | result = 0; | |
1145 | spin_lock_irqsave(&runtime->lock, flags); | |
1146 | if (substream->append) { | |
1147 | if ((long)runtime->avail < count) { | |
1148 | spin_unlock_irqrestore(&runtime->lock, flags); | |
1149 | return -EAGAIN; | |
1150 | } | |
1151 | } | |
1152 | while (count > 0 && runtime->avail > 0) { | |
1153 | count1 = runtime->buffer_size - runtime->appl_ptr; | |
1154 | if (count1 > count) | |
1155 | count1 = count; | |
1156 | if (count1 > (long)runtime->avail) | |
1157 | count1 = runtime->avail; | |
1158 | if (kernel) { | |
1159 | memcpy(runtime->buffer + runtime->appl_ptr, buf, count1); | |
1160 | } else { | |
1161 | spin_unlock_irqrestore(&runtime->lock, flags); | |
1162 | if (copy_from_user(runtime->buffer + runtime->appl_ptr, | |
1163 | (char __user *)buf, count1)) { | |
1164 | spin_lock_irqsave(&runtime->lock, flags); | |
1165 | result = result > 0 ? result : -EFAULT; | |
1166 | goto __end; | |
1167 | } | |
1168 | spin_lock_irqsave(&runtime->lock, flags); | |
1169 | } | |
1170 | runtime->appl_ptr += count1; | |
1171 | runtime->appl_ptr %= runtime->buffer_size; | |
1172 | runtime->avail -= count1; | |
1173 | result += count1; | |
1174 | buf += count1; | |
1175 | count -= count1; | |
1176 | } | |
1177 | __end: | |
1178 | count1 = runtime->avail < runtime->buffer_size; | |
1179 | spin_unlock_irqrestore(&runtime->lock, flags); | |
1180 | if (count1) | |
1181 | snd_rawmidi_output_trigger(substream, 1); | |
1182 | return result; | |
1183 | } | |
1184 | ||
48c9d417 TI |
1185 | long snd_rawmidi_kernel_write(struct snd_rawmidi_substream *substream, |
1186 | const unsigned char *buf, long count) | |
1da177e4 LT |
1187 | { |
1188 | return snd_rawmidi_kernel_write1(substream, buf, count, 1); | |
1189 | } | |
1190 | ||
48c9d417 TI |
1191 | static ssize_t snd_rawmidi_write(struct file *file, const char __user *buf, |
1192 | size_t count, loff_t *offset) | |
1da177e4 LT |
1193 | { |
1194 | long result, timeout; | |
1195 | int count1; | |
48c9d417 TI |
1196 | struct snd_rawmidi_file *rfile; |
1197 | struct snd_rawmidi_runtime *runtime; | |
1198 | struct snd_rawmidi_substream *substream; | |
1da177e4 LT |
1199 | |
1200 | rfile = file->private_data; | |
1201 | substream = rfile->output; | |
1202 | runtime = substream->runtime; | |
1203 | /* we cannot put an atomic message to our buffer */ | |
1204 | if (substream->append && count > runtime->buffer_size) | |
1205 | return -EIO; | |
1206 | result = 0; | |
1207 | while (count > 0) { | |
1208 | spin_lock_irq(&runtime->lock); | |
1209 | while (!snd_rawmidi_ready_append(substream, count)) { | |
1210 | wait_queue_t wait; | |
1211 | if (file->f_flags & O_NONBLOCK) { | |
1212 | spin_unlock_irq(&runtime->lock); | |
1213 | return result > 0 ? result : -EAGAIN; | |
1214 | } | |
1215 | init_waitqueue_entry(&wait, current); | |
1216 | add_wait_queue(&runtime->sleep, &wait); | |
1217 | set_current_state(TASK_INTERRUPTIBLE); | |
1218 | spin_unlock_irq(&runtime->lock); | |
1219 | timeout = schedule_timeout(30 * HZ); | |
1220 | remove_wait_queue(&runtime->sleep, &wait); | |
1221 | if (signal_pending(current)) | |
1222 | return result > 0 ? result : -ERESTARTSYS; | |
1223 | if (!runtime->avail && !timeout) | |
1224 | return result > 0 ? result : -EIO; | |
1225 | spin_lock_irq(&runtime->lock); | |
1226 | } | |
1227 | spin_unlock_irq(&runtime->lock); | |
4d23359b CL |
1228 | count1 = snd_rawmidi_kernel_write1(substream, |
1229 | (unsigned char __force *)buf, | |
1230 | count, 0); | |
1da177e4 LT |
1231 | if (count1 < 0) |
1232 | return result > 0 ? result : count1; | |
1233 | result += count1; | |
1234 | buf += count1; | |
1235 | if ((size_t)count1 < count && (file->f_flags & O_NONBLOCK)) | |
1236 | break; | |
1237 | count -= count1; | |
1238 | } | |
1239 | if (file->f_flags & O_SYNC) { | |
1240 | spin_lock_irq(&runtime->lock); | |
1241 | while (runtime->avail != runtime->buffer_size) { | |
1242 | wait_queue_t wait; | |
1243 | unsigned int last_avail = runtime->avail; | |
1244 | init_waitqueue_entry(&wait, current); | |
1245 | add_wait_queue(&runtime->sleep, &wait); | |
1246 | set_current_state(TASK_INTERRUPTIBLE); | |
1247 | spin_unlock_irq(&runtime->lock); | |
1248 | timeout = schedule_timeout(30 * HZ); | |
1249 | remove_wait_queue(&runtime->sleep, &wait); | |
1250 | if (signal_pending(current)) | |
1251 | return result > 0 ? result : -ERESTARTSYS; | |
1252 | if (runtime->avail == last_avail && !timeout) | |
1253 | return result > 0 ? result : -EIO; | |
1254 | spin_lock_irq(&runtime->lock); | |
1255 | } | |
1256 | spin_unlock_irq(&runtime->lock); | |
1257 | } | |
1258 | return result; | |
1259 | } | |
1260 | ||
1261 | static unsigned int snd_rawmidi_poll(struct file *file, poll_table * wait) | |
1262 | { | |
48c9d417 TI |
1263 | struct snd_rawmidi_file *rfile; |
1264 | struct snd_rawmidi_runtime *runtime; | |
1da177e4 LT |
1265 | unsigned int mask; |
1266 | ||
1267 | rfile = file->private_data; | |
1268 | if (rfile->input != NULL) { | |
1269 | runtime = rfile->input->runtime; | |
1270 | snd_rawmidi_input_trigger(rfile->input, 1); | |
1271 | poll_wait(file, &runtime->sleep, wait); | |
1272 | } | |
1273 | if (rfile->output != NULL) { | |
1274 | runtime = rfile->output->runtime; | |
1275 | poll_wait(file, &runtime->sleep, wait); | |
1276 | } | |
1277 | mask = 0; | |
1278 | if (rfile->input != NULL) { | |
1279 | if (snd_rawmidi_ready(rfile->input)) | |
1280 | mask |= POLLIN | POLLRDNORM; | |
1281 | } | |
1282 | if (rfile->output != NULL) { | |
1283 | if (snd_rawmidi_ready(rfile->output)) | |
1284 | mask |= POLLOUT | POLLWRNORM; | |
1285 | } | |
1286 | return mask; | |
1287 | } | |
1288 | ||
1289 | /* | |
1290 | */ | |
1291 | #ifdef CONFIG_COMPAT | |
1292 | #include "rawmidi_compat.c" | |
1293 | #else | |
1294 | #define snd_rawmidi_ioctl_compat NULL | |
1295 | #endif | |
1296 | ||
1297 | /* | |
1298 | ||
1299 | */ | |
1300 | ||
48c9d417 TI |
1301 | static void snd_rawmidi_proc_info_read(struct snd_info_entry *entry, |
1302 | struct snd_info_buffer *buffer) | |
1da177e4 | 1303 | { |
48c9d417 TI |
1304 | struct snd_rawmidi *rmidi; |
1305 | struct snd_rawmidi_substream *substream; | |
1306 | struct snd_rawmidi_runtime *runtime; | |
1da177e4 LT |
1307 | |
1308 | rmidi = entry->private_data; | |
1309 | snd_iprintf(buffer, "%s\n\n", rmidi->name); | |
1a60d4c5 | 1310 | mutex_lock(&rmidi->open_mutex); |
1da177e4 | 1311 | if (rmidi->info_flags & SNDRV_RAWMIDI_INFO_OUTPUT) { |
9244b2c3 JB |
1312 | list_for_each_entry(substream, |
1313 | &rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substreams, | |
1314 | list) { | |
1da177e4 LT |
1315 | snd_iprintf(buffer, |
1316 | "Output %d\n" | |
1317 | " Tx bytes : %lu\n", | |
1318 | substream->number, | |
1319 | (unsigned long) substream->bytes); | |
1320 | if (substream->opened) { | |
1321 | runtime = substream->runtime; | |
1322 | snd_iprintf(buffer, | |
1323 | " Mode : %s\n" | |
1324 | " Buffer size : %lu\n" | |
1325 | " Avail : %lu\n", | |
1326 | runtime->oss ? "OSS compatible" : "native", | |
1327 | (unsigned long) runtime->buffer_size, | |
1328 | (unsigned long) runtime->avail); | |
1329 | } | |
1330 | } | |
1331 | } | |
1332 | if (rmidi->info_flags & SNDRV_RAWMIDI_INFO_INPUT) { | |
9244b2c3 JB |
1333 | list_for_each_entry(substream, |
1334 | &rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substreams, | |
1335 | list) { | |
1da177e4 LT |
1336 | snd_iprintf(buffer, |
1337 | "Input %d\n" | |
1338 | " Rx bytes : %lu\n", | |
1339 | substream->number, | |
1340 | (unsigned long) substream->bytes); | |
1341 | if (substream->opened) { | |
1342 | runtime = substream->runtime; | |
1343 | snd_iprintf(buffer, | |
1344 | " Buffer size : %lu\n" | |
1345 | " Avail : %lu\n" | |
1346 | " Overruns : %lu\n", | |
1347 | (unsigned long) runtime->buffer_size, | |
1348 | (unsigned long) runtime->avail, | |
1349 | (unsigned long) runtime->xruns); | |
1350 | } | |
1351 | } | |
1352 | } | |
1a60d4c5 | 1353 | mutex_unlock(&rmidi->open_mutex); |
1da177e4 LT |
1354 | } |
1355 | ||
1356 | /* | |
1357 | * Register functions | |
1358 | */ | |
1359 | ||
9c2e08c5 | 1360 | static const struct file_operations snd_rawmidi_f_ops = |
1da177e4 LT |
1361 | { |
1362 | .owner = THIS_MODULE, | |
1363 | .read = snd_rawmidi_read, | |
1364 | .write = snd_rawmidi_write, | |
1365 | .open = snd_rawmidi_open, | |
1366 | .release = snd_rawmidi_release, | |
1367 | .poll = snd_rawmidi_poll, | |
1368 | .unlocked_ioctl = snd_rawmidi_ioctl, | |
1369 | .compat_ioctl = snd_rawmidi_ioctl_compat, | |
1370 | }; | |
1371 | ||
48c9d417 TI |
1372 | static int snd_rawmidi_alloc_substreams(struct snd_rawmidi *rmidi, |
1373 | struct snd_rawmidi_str *stream, | |
1da177e4 LT |
1374 | int direction, |
1375 | int count) | |
1376 | { | |
48c9d417 | 1377 | struct snd_rawmidi_substream *substream; |
1da177e4 LT |
1378 | int idx; |
1379 | ||
1da177e4 | 1380 | for (idx = 0; idx < count; idx++) { |
ca2c0966 | 1381 | substream = kzalloc(sizeof(*substream), GFP_KERNEL); |
73e77ba0 TI |
1382 | if (substream == NULL) { |
1383 | snd_printk(KERN_ERR "rawmidi: cannot allocate substream\n"); | |
1da177e4 | 1384 | return -ENOMEM; |
73e77ba0 | 1385 | } |
1da177e4 LT |
1386 | substream->stream = direction; |
1387 | substream->number = idx; | |
1388 | substream->rmidi = rmidi; | |
1389 | substream->pstr = stream; | |
1390 | list_add_tail(&substream->list, &stream->substreams); | |
1391 | stream->substream_count++; | |
1392 | } | |
1393 | return 0; | |
1394 | } | |
1395 | ||
1396 | /** | |
1397 | * snd_rawmidi_new - create a rawmidi instance | |
1398 | * @card: the card instance | |
1399 | * @id: the id string | |
1400 | * @device: the device index | |
1401 | * @output_count: the number of output streams | |
1402 | * @input_count: the number of input streams | |
1403 | * @rrawmidi: the pointer to store the new rawmidi instance | |
1404 | * | |
1405 | * Creates a new rawmidi instance. | |
1406 | * Use snd_rawmidi_set_ops() to set the operators to the new instance. | |
1407 | * | |
1408 | * Returns zero if successful, or a negative error code on failure. | |
1409 | */ | |
48c9d417 | 1410 | int snd_rawmidi_new(struct snd_card *card, char *id, int device, |
1da177e4 | 1411 | int output_count, int input_count, |
48c9d417 | 1412 | struct snd_rawmidi ** rrawmidi) |
1da177e4 | 1413 | { |
48c9d417 | 1414 | struct snd_rawmidi *rmidi; |
1da177e4 | 1415 | int err; |
48c9d417 | 1416 | static struct snd_device_ops ops = { |
1da177e4 LT |
1417 | .dev_free = snd_rawmidi_dev_free, |
1418 | .dev_register = snd_rawmidi_dev_register, | |
1419 | .dev_disconnect = snd_rawmidi_dev_disconnect, | |
1da177e4 LT |
1420 | }; |
1421 | ||
1422 | snd_assert(rrawmidi != NULL, return -EINVAL); | |
1423 | *rrawmidi = NULL; | |
1424 | snd_assert(card != NULL, return -ENXIO); | |
ca2c0966 | 1425 | rmidi = kzalloc(sizeof(*rmidi), GFP_KERNEL); |
73e77ba0 TI |
1426 | if (rmidi == NULL) { |
1427 | snd_printk(KERN_ERR "rawmidi: cannot allocate\n"); | |
1da177e4 | 1428 | return -ENOMEM; |
73e77ba0 | 1429 | } |
1da177e4 LT |
1430 | rmidi->card = card; |
1431 | rmidi->device = device; | |
1a60d4c5 | 1432 | mutex_init(&rmidi->open_mutex); |
1da177e4 | 1433 | init_waitqueue_head(&rmidi->open_wait); |
c13893d7 AM |
1434 | INIT_LIST_HEAD(&rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substreams); |
1435 | INIT_LIST_HEAD(&rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substreams); | |
1436 | ||
1da177e4 LT |
1437 | if (id != NULL) |
1438 | strlcpy(rmidi->id, id, sizeof(rmidi->id)); | |
73e77ba0 TI |
1439 | if ((err = snd_rawmidi_alloc_substreams(rmidi, |
1440 | &rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT], | |
1441 | SNDRV_RAWMIDI_STREAM_INPUT, | |
1442 | input_count)) < 0) { | |
1da177e4 LT |
1443 | snd_rawmidi_free(rmidi); |
1444 | return err; | |
1445 | } | |
73e77ba0 TI |
1446 | if ((err = snd_rawmidi_alloc_substreams(rmidi, |
1447 | &rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT], | |
1448 | SNDRV_RAWMIDI_STREAM_OUTPUT, | |
1449 | output_count)) < 0) { | |
1da177e4 LT |
1450 | snd_rawmidi_free(rmidi); |
1451 | return err; | |
1452 | } | |
1453 | if ((err = snd_device_new(card, SNDRV_DEV_RAWMIDI, rmidi, &ops)) < 0) { | |
1454 | snd_rawmidi_free(rmidi); | |
1455 | return err; | |
1456 | } | |
1457 | *rrawmidi = rmidi; | |
1458 | return 0; | |
1459 | } | |
1460 | ||
48c9d417 | 1461 | static void snd_rawmidi_free_substreams(struct snd_rawmidi_str *stream) |
1da177e4 | 1462 | { |
48c9d417 | 1463 | struct snd_rawmidi_substream *substream; |
1da177e4 LT |
1464 | |
1465 | while (!list_empty(&stream->substreams)) { | |
48c9d417 | 1466 | substream = list_entry(stream->substreams.next, struct snd_rawmidi_substream, list); |
1da177e4 LT |
1467 | list_del(&substream->list); |
1468 | kfree(substream); | |
1469 | } | |
1470 | } | |
1471 | ||
48c9d417 | 1472 | static int snd_rawmidi_free(struct snd_rawmidi *rmidi) |
1da177e4 LT |
1473 | { |
1474 | snd_assert(rmidi != NULL, return -ENXIO); | |
c461482c TI |
1475 | |
1476 | snd_info_free_entry(rmidi->proc_entry); | |
1477 | rmidi->proc_entry = NULL; | |
1478 | mutex_lock(®ister_mutex); | |
1479 | if (rmidi->ops && rmidi->ops->dev_unregister) | |
1480 | rmidi->ops->dev_unregister(rmidi); | |
1481 | mutex_unlock(®ister_mutex); | |
1482 | ||
1da177e4 LT |
1483 | snd_rawmidi_free_substreams(&rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT]); |
1484 | snd_rawmidi_free_substreams(&rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT]); | |
1485 | if (rmidi->private_free) | |
1486 | rmidi->private_free(rmidi); | |
1487 | kfree(rmidi); | |
1488 | return 0; | |
1489 | } | |
1490 | ||
48c9d417 | 1491 | static int snd_rawmidi_dev_free(struct snd_device *device) |
1da177e4 | 1492 | { |
48c9d417 | 1493 | struct snd_rawmidi *rmidi = device->device_data; |
1da177e4 LT |
1494 | return snd_rawmidi_free(rmidi); |
1495 | } | |
1496 | ||
1497 | #if defined(CONFIG_SND_SEQUENCER) || (defined(MODULE) && defined(CONFIG_SND_SEQUENCER_MODULE)) | |
48c9d417 | 1498 | static void snd_rawmidi_dev_seq_free(struct snd_seq_device *device) |
1da177e4 | 1499 | { |
48c9d417 | 1500 | struct snd_rawmidi *rmidi = device->private_data; |
1da177e4 LT |
1501 | rmidi->seq_dev = NULL; |
1502 | } | |
1503 | #endif | |
1504 | ||
48c9d417 | 1505 | static int snd_rawmidi_dev_register(struct snd_device *device) |
1da177e4 | 1506 | { |
f87135f5 | 1507 | int err; |
48c9d417 | 1508 | struct snd_info_entry *entry; |
1da177e4 | 1509 | char name[16]; |
48c9d417 | 1510 | struct snd_rawmidi *rmidi = device->device_data; |
1da177e4 LT |
1511 | |
1512 | if (rmidi->device >= SNDRV_RAWMIDI_DEVICES) | |
1513 | return -ENOMEM; | |
1a60d4c5 | 1514 | mutex_lock(®ister_mutex); |
f87135f5 | 1515 | if (snd_rawmidi_search(rmidi->card, rmidi->device)) { |
1a60d4c5 | 1516 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
1517 | return -EBUSY; |
1518 | } | |
f87135f5 | 1519 | list_add_tail(&rmidi->list, &snd_rawmidi_devices); |
1da177e4 LT |
1520 | sprintf(name, "midiC%iD%i", rmidi->card->number, rmidi->device); |
1521 | if ((err = snd_register_device(SNDRV_DEVICE_TYPE_RAWMIDI, | |
1522 | rmidi->card, rmidi->device, | |
f87135f5 | 1523 | &snd_rawmidi_f_ops, rmidi, name)) < 0) { |
1da177e4 | 1524 | snd_printk(KERN_ERR "unable to register rawmidi device %i:%i\n", rmidi->card->number, rmidi->device); |
f87135f5 | 1525 | list_del(&rmidi->list); |
1a60d4c5 | 1526 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
1527 | return err; |
1528 | } | |
1529 | if (rmidi->ops && rmidi->ops->dev_register && | |
1530 | (err = rmidi->ops->dev_register(rmidi)) < 0) { | |
1531 | snd_unregister_device(SNDRV_DEVICE_TYPE_RAWMIDI, rmidi->card, rmidi->device); | |
f87135f5 | 1532 | list_del(&rmidi->list); |
1a60d4c5 | 1533 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
1534 | return err; |
1535 | } | |
1536 | #ifdef CONFIG_SND_OSSEMUL | |
1537 | rmidi->ossreg = 0; | |
1538 | if ((int)rmidi->device == midi_map[rmidi->card->number]) { | |
1539 | if (snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_MIDI, | |
f87135f5 CL |
1540 | rmidi->card, 0, &snd_rawmidi_f_ops, |
1541 | rmidi, name) < 0) { | |
1da177e4 LT |
1542 | snd_printk(KERN_ERR "unable to register OSS rawmidi device %i:%i\n", rmidi->card->number, 0); |
1543 | } else { | |
1544 | rmidi->ossreg++; | |
1545 | #ifdef SNDRV_OSS_INFO_DEV_MIDI | |
1546 | snd_oss_info_register(SNDRV_OSS_INFO_DEV_MIDI, rmidi->card->number, rmidi->name); | |
1547 | #endif | |
1548 | } | |
1549 | } | |
1550 | if ((int)rmidi->device == amidi_map[rmidi->card->number]) { | |
1551 | if (snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_MIDI, | |
f87135f5 CL |
1552 | rmidi->card, 1, &snd_rawmidi_f_ops, |
1553 | rmidi, name) < 0) { | |
1da177e4 LT |
1554 | snd_printk(KERN_ERR "unable to register OSS rawmidi device %i:%i\n", rmidi->card->number, 1); |
1555 | } else { | |
1556 | rmidi->ossreg++; | |
1557 | } | |
1558 | } | |
1559 | #endif /* CONFIG_SND_OSSEMUL */ | |
1a60d4c5 | 1560 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
1561 | sprintf(name, "midi%d", rmidi->device); |
1562 | entry = snd_info_create_card_entry(rmidi->card, name, rmidi->card->proc_root); | |
1563 | if (entry) { | |
1564 | entry->private_data = rmidi; | |
1da177e4 LT |
1565 | entry->c.text.read = snd_rawmidi_proc_info_read; |
1566 | if (snd_info_register(entry) < 0) { | |
1567 | snd_info_free_entry(entry); | |
1568 | entry = NULL; | |
1569 | } | |
1570 | } | |
1571 | rmidi->proc_entry = entry; | |
1572 | #if defined(CONFIG_SND_SEQUENCER) || (defined(MODULE) && defined(CONFIG_SND_SEQUENCER_MODULE)) | |
1573 | if (!rmidi->ops || !rmidi->ops->dev_register) { /* own registration mechanism */ | |
1574 | if (snd_seq_device_new(rmidi->card, rmidi->device, SNDRV_SEQ_DEV_ID_MIDISYNTH, 0, &rmidi->seq_dev) >= 0) { | |
1575 | rmidi->seq_dev->private_data = rmidi; | |
1576 | rmidi->seq_dev->private_free = snd_rawmidi_dev_seq_free; | |
1577 | sprintf(rmidi->seq_dev->name, "MIDI %d-%d", rmidi->card->number, rmidi->device); | |
1578 | snd_device_register(rmidi->card, rmidi->seq_dev); | |
1579 | } | |
1580 | } | |
1581 | #endif | |
1582 | return 0; | |
1583 | } | |
1584 | ||
48c9d417 | 1585 | static int snd_rawmidi_dev_disconnect(struct snd_device *device) |
1da177e4 | 1586 | { |
48c9d417 | 1587 | struct snd_rawmidi *rmidi = device->device_data; |
1da177e4 | 1588 | |
1a60d4c5 | 1589 | mutex_lock(®ister_mutex); |
f87135f5 | 1590 | list_del_init(&rmidi->list); |
1da177e4 LT |
1591 | #ifdef CONFIG_SND_OSSEMUL |
1592 | if (rmidi->ossreg) { | |
1593 | if ((int)rmidi->device == midi_map[rmidi->card->number]) { | |
1594 | snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_MIDI, rmidi->card, 0); | |
1595 | #ifdef SNDRV_OSS_INFO_DEV_MIDI | |
1596 | snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_MIDI, rmidi->card->number); | |
1597 | #endif | |
1598 | } | |
1599 | if ((int)rmidi->device == amidi_map[rmidi->card->number]) | |
1600 | snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_MIDI, rmidi->card, 1); | |
1601 | rmidi->ossreg = 0; | |
1602 | } | |
1603 | #endif /* CONFIG_SND_OSSEMUL */ | |
1da177e4 | 1604 | snd_unregister_device(SNDRV_DEVICE_TYPE_RAWMIDI, rmidi->card, rmidi->device); |
1a60d4c5 | 1605 | mutex_unlock(®ister_mutex); |
c461482c | 1606 | return 0; |
1da177e4 LT |
1607 | } |
1608 | ||
1609 | /** | |
1610 | * snd_rawmidi_set_ops - set the rawmidi operators | |
1611 | * @rmidi: the rawmidi instance | |
1612 | * @stream: the stream direction, SNDRV_RAWMIDI_STREAM_XXX | |
1613 | * @ops: the operator table | |
1614 | * | |
1615 | * Sets the rawmidi operators for the given stream direction. | |
1616 | */ | |
48c9d417 TI |
1617 | void snd_rawmidi_set_ops(struct snd_rawmidi *rmidi, int stream, |
1618 | struct snd_rawmidi_ops *ops) | |
1da177e4 | 1619 | { |
48c9d417 | 1620 | struct snd_rawmidi_substream *substream; |
1da177e4 | 1621 | |
9244b2c3 | 1622 | list_for_each_entry(substream, &rmidi->streams[stream].substreams, list) |
1da177e4 | 1623 | substream->ops = ops; |
1da177e4 LT |
1624 | } |
1625 | ||
1626 | /* | |
1627 | * ENTRY functions | |
1628 | */ | |
1629 | ||
1630 | static int __init alsa_rawmidi_init(void) | |
1631 | { | |
1632 | ||
1633 | snd_ctl_register_ioctl(snd_rawmidi_control_ioctl); | |
1634 | snd_ctl_register_ioctl_compat(snd_rawmidi_control_ioctl); | |
1635 | #ifdef CONFIG_SND_OSSEMUL | |
1636 | { int i; | |
1637 | /* check device map table */ | |
1638 | for (i = 0; i < SNDRV_CARDS; i++) { | |
1639 | if (midi_map[i] < 0 || midi_map[i] >= SNDRV_RAWMIDI_DEVICES) { | |
1640 | snd_printk(KERN_ERR "invalid midi_map[%d] = %d\n", i, midi_map[i]); | |
1641 | midi_map[i] = 0; | |
1642 | } | |
1643 | if (amidi_map[i] < 0 || amidi_map[i] >= SNDRV_RAWMIDI_DEVICES) { | |
1644 | snd_printk(KERN_ERR "invalid amidi_map[%d] = %d\n", i, amidi_map[i]); | |
1645 | amidi_map[i] = 1; | |
1646 | } | |
1647 | } | |
1648 | } | |
1649 | #endif /* CONFIG_SND_OSSEMUL */ | |
1650 | return 0; | |
1651 | } | |
1652 | ||
1653 | static void __exit alsa_rawmidi_exit(void) | |
1654 | { | |
1655 | snd_ctl_unregister_ioctl(snd_rawmidi_control_ioctl); | |
1656 | snd_ctl_unregister_ioctl_compat(snd_rawmidi_control_ioctl); | |
1657 | } | |
1658 | ||
1659 | module_init(alsa_rawmidi_init) | |
1660 | module_exit(alsa_rawmidi_exit) | |
1661 | ||
1662 | EXPORT_SYMBOL(snd_rawmidi_output_params); | |
1663 | EXPORT_SYMBOL(snd_rawmidi_input_params); | |
1664 | EXPORT_SYMBOL(snd_rawmidi_drop_output); | |
1665 | EXPORT_SYMBOL(snd_rawmidi_drain_output); | |
1666 | EXPORT_SYMBOL(snd_rawmidi_drain_input); | |
1667 | EXPORT_SYMBOL(snd_rawmidi_receive); | |
1668 | EXPORT_SYMBOL(snd_rawmidi_transmit_empty); | |
1669 | EXPORT_SYMBOL(snd_rawmidi_transmit_peek); | |
1670 | EXPORT_SYMBOL(snd_rawmidi_transmit_ack); | |
1671 | EXPORT_SYMBOL(snd_rawmidi_transmit); | |
1672 | EXPORT_SYMBOL(snd_rawmidi_new); | |
1673 | EXPORT_SYMBOL(snd_rawmidi_set_ops); | |
1da177e4 LT |
1674 | EXPORT_SYMBOL(snd_rawmidi_info_select); |
1675 | EXPORT_SYMBOL(snd_rawmidi_kernel_open); | |
1676 | EXPORT_SYMBOL(snd_rawmidi_kernel_release); | |
1677 | EXPORT_SYMBOL(snd_rawmidi_kernel_read); | |
1678 | EXPORT_SYMBOL(snd_rawmidi_kernel_write); |