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 | ||
1da177e4 LT |
22 | #include <sound/core.h> |
23 | #include <linux/major.h> | |
24 | #include <linux/init.h> | |
1da177e4 LT |
25 | #include <linux/sched.h> |
26 | #include <linux/slab.h> | |
27 | #include <linux/time.h> | |
28 | #include <linux/wait.h> | |
1a60d4c5 | 29 | #include <linux/mutex.h> |
1da177e4 LT |
30 | #include <linux/moduleparam.h> |
31 | #include <linux/delay.h> | |
1da177e4 LT |
32 | #include <sound/rawmidi.h> |
33 | #include <sound/info.h> | |
34 | #include <sound/control.h> | |
35 | #include <sound/minors.h> | |
36 | #include <sound/initval.h> | |
37 | ||
c1017a4c | 38 | MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>"); |
1da177e4 LT |
39 | MODULE_DESCRIPTION("Midlevel RawMidi code for ALSA."); |
40 | MODULE_LICENSE("GPL"); | |
41 | ||
42 | #ifdef CONFIG_SND_OSSEMUL | |
6581f4e7 | 43 | static int midi_map[SNDRV_CARDS]; |
1da177e4 LT |
44 | static int amidi_map[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS-1)] = 1}; |
45 | module_param_array(midi_map, int, NULL, 0444); | |
46 | MODULE_PARM_DESC(midi_map, "Raw MIDI device number assigned to 1st OSS device."); | |
47 | module_param_array(amidi_map, int, NULL, 0444); | |
48 | MODULE_PARM_DESC(amidi_map, "Raw MIDI device number assigned to 2nd OSS device."); | |
49 | #endif /* CONFIG_SND_OSSEMUL */ | |
50 | ||
48c9d417 TI |
51 | static int snd_rawmidi_free(struct snd_rawmidi *rawmidi); |
52 | static int snd_rawmidi_dev_free(struct snd_device *device); | |
53 | static int snd_rawmidi_dev_register(struct snd_device *device); | |
54 | static int snd_rawmidi_dev_disconnect(struct snd_device *device); | |
1da177e4 | 55 | |
f87135f5 | 56 | static LIST_HEAD(snd_rawmidi_devices); |
1a60d4c5 | 57 | static DEFINE_MUTEX(register_mutex); |
1da177e4 | 58 | |
f87135f5 CL |
59 | static struct snd_rawmidi *snd_rawmidi_search(struct snd_card *card, int device) |
60 | { | |
f87135f5 CL |
61 | struct snd_rawmidi *rawmidi; |
62 | ||
9244b2c3 | 63 | list_for_each_entry(rawmidi, &snd_rawmidi_devices, list) |
f87135f5 CL |
64 | if (rawmidi->card == card && rawmidi->device == device) |
65 | return rawmidi; | |
f87135f5 CL |
66 | return NULL; |
67 | } | |
68 | ||
1da177e4 LT |
69 | static inline unsigned short snd_rawmidi_file_flags(struct file *file) |
70 | { | |
71 | switch (file->f_mode & (FMODE_READ | FMODE_WRITE)) { | |
72 | case FMODE_WRITE: | |
73 | return SNDRV_RAWMIDI_LFLG_OUTPUT; | |
74 | case FMODE_READ: | |
75 | return SNDRV_RAWMIDI_LFLG_INPUT; | |
76 | default: | |
77 | return SNDRV_RAWMIDI_LFLG_OPEN; | |
78 | } | |
79 | } | |
80 | ||
48c9d417 | 81 | static inline int snd_rawmidi_ready(struct snd_rawmidi_substream *substream) |
1da177e4 | 82 | { |
48c9d417 | 83 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
1da177e4 LT |
84 | return runtime->avail >= runtime->avail_min; |
85 | } | |
86 | ||
48c9d417 TI |
87 | static inline int snd_rawmidi_ready_append(struct snd_rawmidi_substream *substream, |
88 | size_t count) | |
1da177e4 | 89 | { |
48c9d417 | 90 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
1da177e4 LT |
91 | return runtime->avail >= runtime->avail_min && |
92 | (!substream->append || runtime->avail >= count); | |
93 | } | |
94 | ||
95 | static void snd_rawmidi_input_event_tasklet(unsigned long data) | |
96 | { | |
48c9d417 | 97 | struct snd_rawmidi_substream *substream = (struct snd_rawmidi_substream *)data; |
1da177e4 LT |
98 | substream->runtime->event(substream); |
99 | } | |
100 | ||
101 | static void snd_rawmidi_output_trigger_tasklet(unsigned long data) | |
102 | { | |
48c9d417 | 103 | struct snd_rawmidi_substream *substream = (struct snd_rawmidi_substream *)data; |
1da177e4 LT |
104 | substream->ops->trigger(substream, 1); |
105 | } | |
106 | ||
48c9d417 | 107 | static int snd_rawmidi_runtime_create(struct snd_rawmidi_substream *substream) |
1da177e4 | 108 | { |
48c9d417 | 109 | struct snd_rawmidi_runtime *runtime; |
1da177e4 | 110 | |
ca2c0966 | 111 | if ((runtime = kzalloc(sizeof(*runtime), GFP_KERNEL)) == NULL) |
1da177e4 LT |
112 | return -ENOMEM; |
113 | spin_lock_init(&runtime->lock); | |
114 | init_waitqueue_head(&runtime->sleep); | |
115 | if (substream->stream == SNDRV_RAWMIDI_STREAM_INPUT) | |
116 | tasklet_init(&runtime->tasklet, | |
117 | snd_rawmidi_input_event_tasklet, | |
118 | (unsigned long)substream); | |
119 | else | |
120 | tasklet_init(&runtime->tasklet, | |
121 | snd_rawmidi_output_trigger_tasklet, | |
122 | (unsigned long)substream); | |
123 | runtime->event = NULL; | |
124 | runtime->buffer_size = PAGE_SIZE; | |
125 | runtime->avail_min = 1; | |
126 | if (substream->stream == SNDRV_RAWMIDI_STREAM_INPUT) | |
127 | runtime->avail = 0; | |
128 | else | |
129 | runtime->avail = runtime->buffer_size; | |
130 | if ((runtime->buffer = kmalloc(runtime->buffer_size, GFP_KERNEL)) == NULL) { | |
131 | kfree(runtime); | |
132 | return -ENOMEM; | |
133 | } | |
134 | runtime->appl_ptr = runtime->hw_ptr = 0; | |
135 | substream->runtime = runtime; | |
136 | return 0; | |
137 | } | |
138 | ||
48c9d417 | 139 | static int snd_rawmidi_runtime_free(struct snd_rawmidi_substream *substream) |
1da177e4 | 140 | { |
48c9d417 | 141 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
1da177e4 LT |
142 | |
143 | kfree(runtime->buffer); | |
144 | kfree(runtime); | |
145 | substream->runtime = NULL; | |
146 | return 0; | |
147 | } | |
148 | ||
48c9d417 | 149 | static inline void snd_rawmidi_output_trigger(struct snd_rawmidi_substream *substream,int up) |
1da177e4 | 150 | { |
219df32f TI |
151 | if (!substream->opened) |
152 | return; | |
1da177e4 | 153 | if (up) { |
1f04128a | 154 | tasklet_schedule(&substream->runtime->tasklet); |
1da177e4 LT |
155 | } else { |
156 | tasklet_kill(&substream->runtime->tasklet); | |
157 | substream->ops->trigger(substream, 0); | |
158 | } | |
159 | } | |
160 | ||
48c9d417 | 161 | static void snd_rawmidi_input_trigger(struct snd_rawmidi_substream *substream, int up) |
1da177e4 | 162 | { |
219df32f TI |
163 | if (!substream->opened) |
164 | return; | |
1da177e4 LT |
165 | substream->ops->trigger(substream, up); |
166 | if (!up && substream->runtime->event) | |
167 | tasklet_kill(&substream->runtime->tasklet); | |
168 | } | |
169 | ||
48c9d417 | 170 | int snd_rawmidi_drop_output(struct snd_rawmidi_substream *substream) |
1da177e4 LT |
171 | { |
172 | unsigned long flags; | |
48c9d417 | 173 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
1da177e4 LT |
174 | |
175 | snd_rawmidi_output_trigger(substream, 0); | |
176 | runtime->drain = 0; | |
177 | spin_lock_irqsave(&runtime->lock, flags); | |
178 | runtime->appl_ptr = runtime->hw_ptr = 0; | |
179 | runtime->avail = runtime->buffer_size; | |
180 | spin_unlock_irqrestore(&runtime->lock, flags); | |
181 | return 0; | |
182 | } | |
183 | ||
48c9d417 | 184 | int snd_rawmidi_drain_output(struct snd_rawmidi_substream *substream) |
1da177e4 LT |
185 | { |
186 | int err; | |
187 | long timeout; | |
48c9d417 | 188 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
1da177e4 LT |
189 | |
190 | err = 0; | |
191 | runtime->drain = 1; | |
192 | timeout = wait_event_interruptible_timeout(runtime->sleep, | |
193 | (runtime->avail >= runtime->buffer_size), | |
194 | 10*HZ); | |
195 | if (signal_pending(current)) | |
196 | err = -ERESTARTSYS; | |
197 | if (runtime->avail < runtime->buffer_size && !timeout) { | |
198 | snd_printk(KERN_WARNING "rawmidi drain error (avail = %li, buffer_size = %li)\n", (long)runtime->avail, (long)runtime->buffer_size); | |
199 | err = -EIO; | |
200 | } | |
201 | runtime->drain = 0; | |
202 | if (err != -ERESTARTSYS) { | |
203 | /* we need wait a while to make sure that Tx FIFOs are empty */ | |
204 | if (substream->ops->drain) | |
205 | substream->ops->drain(substream); | |
206 | else | |
207 | msleep(50); | |
208 | snd_rawmidi_drop_output(substream); | |
209 | } | |
210 | return err; | |
211 | } | |
212 | ||
48c9d417 | 213 | int snd_rawmidi_drain_input(struct snd_rawmidi_substream *substream) |
1da177e4 LT |
214 | { |
215 | unsigned long flags; | |
48c9d417 | 216 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
1da177e4 LT |
217 | |
218 | snd_rawmidi_input_trigger(substream, 0); | |
219 | runtime->drain = 0; | |
220 | spin_lock_irqsave(&runtime->lock, flags); | |
221 | runtime->appl_ptr = runtime->hw_ptr = 0; | |
222 | runtime->avail = 0; | |
223 | spin_unlock_irqrestore(&runtime->lock, flags); | |
224 | return 0; | |
225 | } | |
226 | ||
f87135f5 | 227 | int snd_rawmidi_kernel_open(struct snd_card *card, int device, int subdevice, |
48c9d417 | 228 | int mode, struct snd_rawmidi_file * rfile) |
1da177e4 | 229 | { |
48c9d417 | 230 | struct snd_rawmidi *rmidi; |
1da177e4 | 231 | struct list_head *list1, *list2; |
48c9d417 TI |
232 | struct snd_rawmidi_substream *sinput = NULL, *soutput = NULL; |
233 | struct snd_rawmidi_runtime *input = NULL, *output = NULL; | |
1da177e4 LT |
234 | int err; |
235 | ||
236 | if (rfile) | |
237 | rfile->input = rfile->output = NULL; | |
1a60d4c5 | 238 | mutex_lock(®ister_mutex); |
f87135f5 | 239 | rmidi = snd_rawmidi_search(card, device); |
1a60d4c5 | 240 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
241 | if (rmidi == NULL) { |
242 | err = -ENODEV; | |
243 | goto __error1; | |
244 | } | |
245 | if (!try_module_get(rmidi->card->module)) { | |
246 | err = -EFAULT; | |
247 | goto __error1; | |
248 | } | |
249 | if (!(mode & SNDRV_RAWMIDI_LFLG_NOOPENLOCK)) | |
1a60d4c5 | 250 | mutex_lock(&rmidi->open_mutex); |
1da177e4 LT |
251 | if (mode & SNDRV_RAWMIDI_LFLG_INPUT) { |
252 | if (!(rmidi->info_flags & SNDRV_RAWMIDI_INFO_INPUT)) { | |
253 | err = -ENXIO; | |
254 | goto __error; | |
255 | } | |
256 | if (subdevice >= 0 && (unsigned int)subdevice >= rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substream_count) { | |
257 | err = -ENODEV; | |
258 | goto __error; | |
259 | } | |
260 | if (rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substream_opened >= | |
261 | rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substream_count) { | |
262 | err = -EAGAIN; | |
263 | goto __error; | |
264 | } | |
265 | } | |
266 | if (mode & SNDRV_RAWMIDI_LFLG_OUTPUT) { | |
267 | if (!(rmidi->info_flags & SNDRV_RAWMIDI_INFO_OUTPUT)) { | |
268 | err = -ENXIO; | |
269 | goto __error; | |
270 | } | |
271 | if (subdevice >= 0 && (unsigned int)subdevice >= rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substream_count) { | |
272 | err = -ENODEV; | |
273 | goto __error; | |
274 | } | |
275 | if (rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substream_opened >= | |
276 | rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substream_count) { | |
277 | err = -EAGAIN; | |
278 | goto __error; | |
279 | } | |
280 | } | |
281 | list1 = rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substreams.next; | |
282 | while (1) { | |
283 | if (list1 == &rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substreams) { | |
284 | sinput = NULL; | |
285 | if (mode & SNDRV_RAWMIDI_LFLG_INPUT) { | |
286 | err = -EAGAIN; | |
287 | goto __error; | |
288 | } | |
289 | break; | |
290 | } | |
48c9d417 | 291 | sinput = list_entry(list1, struct snd_rawmidi_substream, list); |
1da177e4 LT |
292 | if ((mode & SNDRV_RAWMIDI_LFLG_INPUT) && sinput->opened) |
293 | goto __nexti; | |
294 | if (subdevice < 0 || (subdevice >= 0 && subdevice == sinput->number)) | |
295 | break; | |
296 | __nexti: | |
297 | list1 = list1->next; | |
298 | } | |
299 | list2 = rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substreams.next; | |
300 | while (1) { | |
301 | if (list2 == &rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substreams) { | |
302 | soutput = NULL; | |
303 | if (mode & SNDRV_RAWMIDI_LFLG_OUTPUT) { | |
304 | err = -EAGAIN; | |
305 | goto __error; | |
306 | } | |
307 | break; | |
308 | } | |
48c9d417 | 309 | soutput = list_entry(list2, struct snd_rawmidi_substream, list); |
1da177e4 LT |
310 | if (mode & SNDRV_RAWMIDI_LFLG_OUTPUT) { |
311 | if (mode & SNDRV_RAWMIDI_LFLG_APPEND) { | |
312 | if (soutput->opened && !soutput->append) | |
313 | goto __nexto; | |
314 | } else { | |
315 | if (soutput->opened) | |
316 | goto __nexto; | |
317 | } | |
318 | } | |
319 | if (subdevice < 0 || (subdevice >= 0 && subdevice == soutput->number)) | |
320 | break; | |
321 | __nexto: | |
322 | list2 = list2->next; | |
323 | } | |
324 | if (mode & SNDRV_RAWMIDI_LFLG_INPUT) { | |
325 | if ((err = snd_rawmidi_runtime_create(sinput)) < 0) | |
326 | goto __error; | |
327 | input = sinput->runtime; | |
328 | if ((err = sinput->ops->open(sinput)) < 0) | |
329 | goto __error; | |
330 | sinput->opened = 1; | |
331 | rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substream_opened++; | |
332 | } else { | |
333 | sinput = NULL; | |
334 | } | |
335 | if (mode & SNDRV_RAWMIDI_LFLG_OUTPUT) { | |
336 | if (soutput->opened) | |
337 | goto __skip_output; | |
338 | if ((err = snd_rawmidi_runtime_create(soutput)) < 0) { | |
339 | if (mode & SNDRV_RAWMIDI_LFLG_INPUT) | |
340 | sinput->ops->close(sinput); | |
341 | goto __error; | |
342 | } | |
343 | output = soutput->runtime; | |
344 | if ((err = soutput->ops->open(soutput)) < 0) { | |
345 | if (mode & SNDRV_RAWMIDI_LFLG_INPUT) | |
346 | sinput->ops->close(sinput); | |
347 | goto __error; | |
348 | } | |
349 | __skip_output: | |
350 | soutput->opened = 1; | |
351 | if (mode & SNDRV_RAWMIDI_LFLG_APPEND) | |
352 | soutput->append = 1; | |
353 | if (soutput->use_count++ == 0) | |
354 | soutput->active_sensing = 1; | |
355 | rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substream_opened++; | |
356 | } else { | |
357 | soutput = NULL; | |
358 | } | |
359 | if (!(mode & SNDRV_RAWMIDI_LFLG_NOOPENLOCK)) | |
1a60d4c5 | 360 | mutex_unlock(&rmidi->open_mutex); |
1da177e4 LT |
361 | if (rfile) { |
362 | rfile->rmidi = rmidi; | |
363 | rfile->input = sinput; | |
364 | rfile->output = soutput; | |
365 | } | |
366 | return 0; | |
367 | ||
368 | __error: | |
369 | if (input != NULL) | |
370 | snd_rawmidi_runtime_free(sinput); | |
371 | if (output != NULL) | |
372 | snd_rawmidi_runtime_free(soutput); | |
373 | module_put(rmidi->card->module); | |
374 | if (!(mode & SNDRV_RAWMIDI_LFLG_NOOPENLOCK)) | |
1a60d4c5 | 375 | mutex_unlock(&rmidi->open_mutex); |
1da177e4 LT |
376 | __error1: |
377 | return err; | |
378 | } | |
379 | ||
380 | static int snd_rawmidi_open(struct inode *inode, struct file *file) | |
381 | { | |
382 | int maj = imajor(inode); | |
48c9d417 | 383 | struct snd_card *card; |
f87135f5 | 384 | int subdevice; |
1da177e4 LT |
385 | unsigned short fflags; |
386 | int err; | |
48c9d417 TI |
387 | struct snd_rawmidi *rmidi; |
388 | struct snd_rawmidi_file *rawmidi_file; | |
1da177e4 | 389 | wait_queue_t wait; |
48c9d417 | 390 | struct snd_ctl_file *kctl; |
1da177e4 | 391 | |
f1902860 | 392 | if (maj == snd_major) { |
f87135f5 CL |
393 | rmidi = snd_lookup_minor_data(iminor(inode), |
394 | SNDRV_DEVICE_TYPE_RAWMIDI); | |
1da177e4 | 395 | #ifdef CONFIG_SND_OSSEMUL |
f1902860 | 396 | } else if (maj == SOUND_MAJOR) { |
f87135f5 CL |
397 | rmidi = snd_lookup_oss_minor_data(iminor(inode), |
398 | SNDRV_OSS_DEVICE_TYPE_MIDI); | |
1da177e4 | 399 | #endif |
f1902860 | 400 | } else |
1da177e4 | 401 | return -ENXIO; |
1da177e4 | 402 | |
1da177e4 LT |
403 | if (rmidi == NULL) |
404 | return -ENODEV; | |
1da177e4 LT |
405 | if ((file->f_flags & O_APPEND) && !(file->f_flags & O_NONBLOCK)) |
406 | return -EINVAL; /* invalid combination */ | |
407 | card = rmidi->card; | |
408 | err = snd_card_file_add(card, file); | |
409 | if (err < 0) | |
410 | return -ENODEV; | |
411 | fflags = snd_rawmidi_file_flags(file); | |
f1902860 | 412 | if ((file->f_flags & O_APPEND) || maj == SOUND_MAJOR) /* OSS emul? */ |
1da177e4 LT |
413 | fflags |= SNDRV_RAWMIDI_LFLG_APPEND; |
414 | fflags |= SNDRV_RAWMIDI_LFLG_NOOPENLOCK; | |
415 | rawmidi_file = kmalloc(sizeof(*rawmidi_file), GFP_KERNEL); | |
416 | if (rawmidi_file == NULL) { | |
417 | snd_card_file_remove(card, file); | |
418 | return -ENOMEM; | |
419 | } | |
420 | init_waitqueue_entry(&wait, current); | |
421 | add_wait_queue(&rmidi->open_wait, &wait); | |
1a60d4c5 | 422 | mutex_lock(&rmidi->open_mutex); |
1da177e4 LT |
423 | while (1) { |
424 | subdevice = -1; | |
399ccdc1 | 425 | read_lock(&card->ctl_files_rwlock); |
9244b2c3 | 426 | list_for_each_entry(kctl, &card->ctl_files, list) { |
1da177e4 LT |
427 | if (kctl->pid == current->pid) { |
428 | subdevice = kctl->prefer_rawmidi_subdevice; | |
2529bba7 TI |
429 | if (subdevice != -1) |
430 | break; | |
1da177e4 LT |
431 | } |
432 | } | |
399ccdc1 | 433 | read_unlock(&card->ctl_files_rwlock); |
f87135f5 CL |
434 | err = snd_rawmidi_kernel_open(rmidi->card, rmidi->device, |
435 | subdevice, fflags, rawmidi_file); | |
1da177e4 LT |
436 | if (err >= 0) |
437 | break; | |
438 | if (err == -EAGAIN) { | |
439 | if (file->f_flags & O_NONBLOCK) { | |
440 | err = -EBUSY; | |
441 | break; | |
442 | } | |
443 | } else | |
444 | break; | |
445 | set_current_state(TASK_INTERRUPTIBLE); | |
1a60d4c5 | 446 | mutex_unlock(&rmidi->open_mutex); |
1da177e4 | 447 | schedule(); |
1a60d4c5 | 448 | mutex_lock(&rmidi->open_mutex); |
1da177e4 LT |
449 | if (signal_pending(current)) { |
450 | err = -ERESTARTSYS; | |
451 | break; | |
452 | } | |
453 | } | |
454 | #ifdef CONFIG_SND_OSSEMUL | |
455 | if (rawmidi_file->input && rawmidi_file->input->runtime) | |
456 | rawmidi_file->input->runtime->oss = (maj == SOUND_MAJOR); | |
457 | if (rawmidi_file->output && rawmidi_file->output->runtime) | |
458 | rawmidi_file->output->runtime->oss = (maj == SOUND_MAJOR); | |
459 | #endif | |
460 | remove_wait_queue(&rmidi->open_wait, &wait); | |
461 | if (err >= 0) { | |
462 | file->private_data = rawmidi_file; | |
463 | } else { | |
464 | snd_card_file_remove(card, file); | |
465 | kfree(rawmidi_file); | |
466 | } | |
1a60d4c5 | 467 | mutex_unlock(&rmidi->open_mutex); |
1da177e4 LT |
468 | return err; |
469 | } | |
470 | ||
48c9d417 | 471 | int snd_rawmidi_kernel_release(struct snd_rawmidi_file * rfile) |
1da177e4 | 472 | { |
48c9d417 TI |
473 | struct snd_rawmidi *rmidi; |
474 | struct snd_rawmidi_substream *substream; | |
475 | struct snd_rawmidi_runtime *runtime; | |
1da177e4 | 476 | |
7eaa943c TI |
477 | if (snd_BUG_ON(!rfile)) |
478 | return -ENXIO; | |
1da177e4 | 479 | rmidi = rfile->rmidi; |
1a60d4c5 | 480 | mutex_lock(&rmidi->open_mutex); |
1da177e4 LT |
481 | if (rfile->input != NULL) { |
482 | substream = rfile->input; | |
483 | rfile->input = NULL; | |
484 | runtime = substream->runtime; | |
485 | snd_rawmidi_input_trigger(substream, 0); | |
486 | substream->ops->close(substream); | |
487 | if (runtime->private_free != NULL) | |
488 | runtime->private_free(substream); | |
489 | snd_rawmidi_runtime_free(substream); | |
490 | substream->opened = 0; | |
491 | rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substream_opened--; | |
492 | } | |
493 | if (rfile->output != NULL) { | |
494 | substream = rfile->output; | |
495 | rfile->output = NULL; | |
496 | if (--substream->use_count == 0) { | |
497 | runtime = substream->runtime; | |
498 | if (substream->active_sensing) { | |
499 | unsigned char buf = 0xfe; | |
500 | /* sending single active sensing message to shut the device up */ | |
501 | snd_rawmidi_kernel_write(substream, &buf, 1); | |
502 | } | |
503 | if (snd_rawmidi_drain_output(substream) == -ERESTARTSYS) | |
504 | snd_rawmidi_output_trigger(substream, 0); | |
505 | substream->ops->close(substream); | |
506 | if (runtime->private_free != NULL) | |
507 | runtime->private_free(substream); | |
508 | snd_rawmidi_runtime_free(substream); | |
509 | substream->opened = 0; | |
510 | substream->append = 0; | |
511 | } | |
512 | rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substream_opened--; | |
513 | } | |
1a60d4c5 | 514 | mutex_unlock(&rmidi->open_mutex); |
1da177e4 LT |
515 | module_put(rmidi->card->module); |
516 | return 0; | |
517 | } | |
518 | ||
519 | static int snd_rawmidi_release(struct inode *inode, struct file *file) | |
520 | { | |
48c9d417 TI |
521 | struct snd_rawmidi_file *rfile; |
522 | struct snd_rawmidi *rmidi; | |
1da177e4 LT |
523 | int err; |
524 | ||
525 | rfile = file->private_data; | |
526 | err = snd_rawmidi_kernel_release(rfile); | |
527 | rmidi = rfile->rmidi; | |
528 | wake_up(&rmidi->open_wait); | |
529 | kfree(rfile); | |
530 | snd_card_file_remove(rmidi->card, file); | |
531 | return err; | |
532 | } | |
533 | ||
18612048 AB |
534 | static int snd_rawmidi_info(struct snd_rawmidi_substream *substream, |
535 | struct snd_rawmidi_info *info) | |
1da177e4 | 536 | { |
48c9d417 | 537 | struct snd_rawmidi *rmidi; |
1da177e4 LT |
538 | |
539 | if (substream == NULL) | |
540 | return -ENODEV; | |
541 | rmidi = substream->rmidi; | |
542 | memset(info, 0, sizeof(*info)); | |
543 | info->card = rmidi->card->number; | |
544 | info->device = rmidi->device; | |
545 | info->subdevice = substream->number; | |
546 | info->stream = substream->stream; | |
547 | info->flags = rmidi->info_flags; | |
548 | strcpy(info->id, rmidi->id); | |
549 | strcpy(info->name, rmidi->name); | |
550 | strcpy(info->subname, substream->name); | |
551 | info->subdevices_count = substream->pstr->substream_count; | |
552 | info->subdevices_avail = (substream->pstr->substream_count - | |
553 | substream->pstr->substream_opened); | |
554 | return 0; | |
555 | } | |
556 | ||
48c9d417 TI |
557 | static int snd_rawmidi_info_user(struct snd_rawmidi_substream *substream, |
558 | struct snd_rawmidi_info __user * _info) | |
1da177e4 | 559 | { |
48c9d417 | 560 | struct snd_rawmidi_info info; |
1da177e4 LT |
561 | int err; |
562 | if ((err = snd_rawmidi_info(substream, &info)) < 0) | |
563 | return err; | |
48c9d417 | 564 | if (copy_to_user(_info, &info, sizeof(struct snd_rawmidi_info))) |
1da177e4 LT |
565 | return -EFAULT; |
566 | return 0; | |
567 | } | |
568 | ||
48c9d417 | 569 | int snd_rawmidi_info_select(struct snd_card *card, struct snd_rawmidi_info *info) |
1da177e4 | 570 | { |
48c9d417 TI |
571 | struct snd_rawmidi *rmidi; |
572 | struct snd_rawmidi_str *pstr; | |
573 | struct snd_rawmidi_substream *substream; | |
f87135f5 | 574 | |
1a60d4c5 | 575 | mutex_lock(®ister_mutex); |
f87135f5 | 576 | rmidi = snd_rawmidi_search(card, info->device); |
1a60d4c5 | 577 | mutex_unlock(®ister_mutex); |
a106cd3d CL |
578 | if (!rmidi) |
579 | return -ENXIO; | |
1da177e4 LT |
580 | if (info->stream < 0 || info->stream > 1) |
581 | return -EINVAL; | |
582 | pstr = &rmidi->streams[info->stream]; | |
583 | if (pstr->substream_count == 0) | |
584 | return -ENOENT; | |
585 | if (info->subdevice >= pstr->substream_count) | |
586 | return -ENXIO; | |
9244b2c3 | 587 | list_for_each_entry(substream, &pstr->substreams, list) { |
1da177e4 LT |
588 | if ((unsigned int)substream->number == info->subdevice) |
589 | return snd_rawmidi_info(substream, info); | |
590 | } | |
591 | return -ENXIO; | |
592 | } | |
593 | ||
48c9d417 TI |
594 | static int snd_rawmidi_info_select_user(struct snd_card *card, |
595 | struct snd_rawmidi_info __user *_info) | |
1da177e4 LT |
596 | { |
597 | int err; | |
48c9d417 | 598 | struct snd_rawmidi_info info; |
1da177e4 LT |
599 | if (get_user(info.device, &_info->device)) |
600 | return -EFAULT; | |
601 | if (get_user(info.stream, &_info->stream)) | |
602 | return -EFAULT; | |
603 | if (get_user(info.subdevice, &_info->subdevice)) | |
604 | return -EFAULT; | |
605 | if ((err = snd_rawmidi_info_select(card, &info)) < 0) | |
606 | return err; | |
48c9d417 | 607 | if (copy_to_user(_info, &info, sizeof(struct snd_rawmidi_info))) |
1da177e4 LT |
608 | return -EFAULT; |
609 | return 0; | |
610 | } | |
611 | ||
48c9d417 TI |
612 | int snd_rawmidi_output_params(struct snd_rawmidi_substream *substream, |
613 | struct snd_rawmidi_params * params) | |
1da177e4 LT |
614 | { |
615 | char *newbuf; | |
48c9d417 | 616 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
1da177e4 LT |
617 | |
618 | if (substream->append && substream->use_count > 1) | |
619 | return -EBUSY; | |
620 | snd_rawmidi_drain_output(substream); | |
621 | if (params->buffer_size < 32 || params->buffer_size > 1024L * 1024L) { | |
622 | return -EINVAL; | |
623 | } | |
624 | if (params->avail_min < 1 || params->avail_min > params->buffer_size) { | |
625 | return -EINVAL; | |
626 | } | |
627 | if (params->buffer_size != runtime->buffer_size) { | |
4fa95ef6 JJ |
628 | newbuf = kmalloc(params->buffer_size, GFP_KERNEL); |
629 | if (!newbuf) | |
1da177e4 LT |
630 | return -ENOMEM; |
631 | kfree(runtime->buffer); | |
632 | runtime->buffer = newbuf; | |
633 | runtime->buffer_size = params->buffer_size; | |
1b98ea47 | 634 | runtime->avail = runtime->buffer_size; |
1da177e4 LT |
635 | } |
636 | runtime->avail_min = params->avail_min; | |
637 | substream->active_sensing = !params->no_active_sensing; | |
638 | return 0; | |
639 | } | |
640 | ||
48c9d417 TI |
641 | int snd_rawmidi_input_params(struct snd_rawmidi_substream *substream, |
642 | struct snd_rawmidi_params * params) | |
1da177e4 LT |
643 | { |
644 | char *newbuf; | |
48c9d417 | 645 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
1da177e4 LT |
646 | |
647 | snd_rawmidi_drain_input(substream); | |
648 | if (params->buffer_size < 32 || params->buffer_size > 1024L * 1024L) { | |
649 | return -EINVAL; | |
650 | } | |
651 | if (params->avail_min < 1 || params->avail_min > params->buffer_size) { | |
652 | return -EINVAL; | |
653 | } | |
654 | if (params->buffer_size != runtime->buffer_size) { | |
4fa95ef6 JJ |
655 | newbuf = kmalloc(params->buffer_size, GFP_KERNEL); |
656 | if (!newbuf) | |
1da177e4 LT |
657 | return -ENOMEM; |
658 | kfree(runtime->buffer); | |
659 | runtime->buffer = newbuf; | |
660 | runtime->buffer_size = params->buffer_size; | |
661 | } | |
662 | runtime->avail_min = params->avail_min; | |
663 | return 0; | |
664 | } | |
665 | ||
48c9d417 TI |
666 | static int snd_rawmidi_output_status(struct snd_rawmidi_substream *substream, |
667 | struct snd_rawmidi_status * status) | |
1da177e4 | 668 | { |
48c9d417 | 669 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
1da177e4 LT |
670 | |
671 | memset(status, 0, sizeof(*status)); | |
672 | status->stream = SNDRV_RAWMIDI_STREAM_OUTPUT; | |
673 | spin_lock_irq(&runtime->lock); | |
674 | status->avail = runtime->avail; | |
675 | spin_unlock_irq(&runtime->lock); | |
676 | return 0; | |
677 | } | |
678 | ||
48c9d417 TI |
679 | static int snd_rawmidi_input_status(struct snd_rawmidi_substream *substream, |
680 | struct snd_rawmidi_status * status) | |
1da177e4 | 681 | { |
48c9d417 | 682 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
1da177e4 LT |
683 | |
684 | memset(status, 0, sizeof(*status)); | |
685 | status->stream = SNDRV_RAWMIDI_STREAM_INPUT; | |
686 | spin_lock_irq(&runtime->lock); | |
687 | status->avail = runtime->avail; | |
688 | status->xruns = runtime->xruns; | |
689 | runtime->xruns = 0; | |
690 | spin_unlock_irq(&runtime->lock); | |
691 | return 0; | |
692 | } | |
693 | ||
694 | static long snd_rawmidi_ioctl(struct file *file, unsigned int cmd, unsigned long arg) | |
695 | { | |
48c9d417 | 696 | struct snd_rawmidi_file *rfile; |
1da177e4 LT |
697 | void __user *argp = (void __user *)arg; |
698 | ||
699 | rfile = file->private_data; | |
700 | if (((cmd >> 8) & 0xff) != 'W') | |
701 | return -ENOTTY; | |
702 | switch (cmd) { | |
703 | case SNDRV_RAWMIDI_IOCTL_PVERSION: | |
704 | return put_user(SNDRV_RAWMIDI_VERSION, (int __user *)argp) ? -EFAULT : 0; | |
705 | case SNDRV_RAWMIDI_IOCTL_INFO: | |
706 | { | |
48c9d417 TI |
707 | int stream; |
708 | struct snd_rawmidi_info __user *info = argp; | |
1da177e4 LT |
709 | if (get_user(stream, &info->stream)) |
710 | return -EFAULT; | |
711 | switch (stream) { | |
712 | case SNDRV_RAWMIDI_STREAM_INPUT: | |
713 | return snd_rawmidi_info_user(rfile->input, info); | |
714 | case SNDRV_RAWMIDI_STREAM_OUTPUT: | |
715 | return snd_rawmidi_info_user(rfile->output, info); | |
716 | default: | |
717 | return -EINVAL; | |
718 | } | |
719 | } | |
720 | case SNDRV_RAWMIDI_IOCTL_PARAMS: | |
721 | { | |
48c9d417 TI |
722 | struct snd_rawmidi_params params; |
723 | if (copy_from_user(¶ms, argp, sizeof(struct snd_rawmidi_params))) | |
1da177e4 LT |
724 | return -EFAULT; |
725 | switch (params.stream) { | |
726 | case SNDRV_RAWMIDI_STREAM_OUTPUT: | |
727 | if (rfile->output == NULL) | |
728 | return -EINVAL; | |
729 | return snd_rawmidi_output_params(rfile->output, ¶ms); | |
730 | case SNDRV_RAWMIDI_STREAM_INPUT: | |
731 | if (rfile->input == NULL) | |
732 | return -EINVAL; | |
733 | return snd_rawmidi_input_params(rfile->input, ¶ms); | |
734 | default: | |
735 | return -EINVAL; | |
736 | } | |
737 | } | |
738 | case SNDRV_RAWMIDI_IOCTL_STATUS: | |
739 | { | |
740 | int err = 0; | |
48c9d417 TI |
741 | struct snd_rawmidi_status status; |
742 | if (copy_from_user(&status, argp, sizeof(struct snd_rawmidi_status))) | |
1da177e4 LT |
743 | return -EFAULT; |
744 | switch (status.stream) { | |
745 | case SNDRV_RAWMIDI_STREAM_OUTPUT: | |
746 | if (rfile->output == NULL) | |
747 | return -EINVAL; | |
748 | err = snd_rawmidi_output_status(rfile->output, &status); | |
749 | break; | |
750 | case SNDRV_RAWMIDI_STREAM_INPUT: | |
751 | if (rfile->input == NULL) | |
752 | return -EINVAL; | |
753 | err = snd_rawmidi_input_status(rfile->input, &status); | |
754 | break; | |
755 | default: | |
756 | return -EINVAL; | |
757 | } | |
758 | if (err < 0) | |
759 | return err; | |
48c9d417 | 760 | if (copy_to_user(argp, &status, sizeof(struct snd_rawmidi_status))) |
1da177e4 LT |
761 | return -EFAULT; |
762 | return 0; | |
763 | } | |
764 | case SNDRV_RAWMIDI_IOCTL_DROP: | |
765 | { | |
766 | int val; | |
767 | if (get_user(val, (int __user *) argp)) | |
768 | return -EFAULT; | |
769 | switch (val) { | |
770 | case SNDRV_RAWMIDI_STREAM_OUTPUT: | |
771 | if (rfile->output == NULL) | |
772 | return -EINVAL; | |
773 | return snd_rawmidi_drop_output(rfile->output); | |
774 | default: | |
775 | return -EINVAL; | |
776 | } | |
777 | } | |
778 | case SNDRV_RAWMIDI_IOCTL_DRAIN: | |
779 | { | |
780 | int val; | |
781 | if (get_user(val, (int __user *) argp)) | |
782 | return -EFAULT; | |
783 | switch (val) { | |
784 | case SNDRV_RAWMIDI_STREAM_OUTPUT: | |
785 | if (rfile->output == NULL) | |
786 | return -EINVAL; | |
787 | return snd_rawmidi_drain_output(rfile->output); | |
788 | case SNDRV_RAWMIDI_STREAM_INPUT: | |
789 | if (rfile->input == NULL) | |
790 | return -EINVAL; | |
791 | return snd_rawmidi_drain_input(rfile->input); | |
792 | default: | |
793 | return -EINVAL; | |
794 | } | |
795 | } | |
796 | #ifdef CONFIG_SND_DEBUG | |
797 | default: | |
798 | snd_printk(KERN_WARNING "rawmidi: unknown command = 0x%x\n", cmd); | |
799 | #endif | |
800 | } | |
801 | return -ENOTTY; | |
802 | } | |
803 | ||
48c9d417 TI |
804 | static int snd_rawmidi_control_ioctl(struct snd_card *card, |
805 | struct snd_ctl_file *control, | |
1da177e4 LT |
806 | unsigned int cmd, |
807 | unsigned long arg) | |
808 | { | |
809 | void __user *argp = (void __user *)arg; | |
1da177e4 | 810 | |
1da177e4 LT |
811 | switch (cmd) { |
812 | case SNDRV_CTL_IOCTL_RAWMIDI_NEXT_DEVICE: | |
813 | { | |
814 | int device; | |
815 | ||
816 | if (get_user(device, (int __user *)argp)) | |
817 | return -EFAULT; | |
1a60d4c5 | 818 | mutex_lock(®ister_mutex); |
1da177e4 LT |
819 | device = device < 0 ? 0 : device + 1; |
820 | while (device < SNDRV_RAWMIDI_DEVICES) { | |
f87135f5 | 821 | if (snd_rawmidi_search(card, device)) |
1da177e4 LT |
822 | break; |
823 | device++; | |
824 | } | |
825 | if (device == SNDRV_RAWMIDI_DEVICES) | |
826 | device = -1; | |
1a60d4c5 | 827 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
828 | if (put_user(device, (int __user *)argp)) |
829 | return -EFAULT; | |
830 | return 0; | |
831 | } | |
832 | case SNDRV_CTL_IOCTL_RAWMIDI_PREFER_SUBDEVICE: | |
833 | { | |
834 | int val; | |
835 | ||
836 | if (get_user(val, (int __user *)argp)) | |
837 | return -EFAULT; | |
838 | control->prefer_rawmidi_subdevice = val; | |
839 | return 0; | |
840 | } | |
841 | case SNDRV_CTL_IOCTL_RAWMIDI_INFO: | |
842 | return snd_rawmidi_info_select_user(card, argp); | |
843 | } | |
844 | return -ENOIOCTLCMD; | |
845 | } | |
846 | ||
847 | /** | |
848 | * snd_rawmidi_receive - receive the input data from the device | |
849 | * @substream: the rawmidi substream | |
850 | * @buffer: the buffer pointer | |
851 | * @count: the data size to read | |
852 | * | |
853 | * Reads the data from the internal buffer. | |
854 | * | |
855 | * Returns the size of read data, or a negative error code on failure. | |
856 | */ | |
48c9d417 TI |
857 | int snd_rawmidi_receive(struct snd_rawmidi_substream *substream, |
858 | const unsigned char *buffer, int count) | |
1da177e4 LT |
859 | { |
860 | unsigned long flags; | |
861 | int result = 0, count1; | |
48c9d417 | 862 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
1da177e4 | 863 | |
219df32f TI |
864 | if (!substream->opened) |
865 | return -EBADFD; | |
1da177e4 LT |
866 | if (runtime->buffer == NULL) { |
867 | snd_printd("snd_rawmidi_receive: input is not active!!!\n"); | |
868 | return -EINVAL; | |
869 | } | |
870 | spin_lock_irqsave(&runtime->lock, flags); | |
871 | if (count == 1) { /* special case, faster code */ | |
872 | substream->bytes++; | |
873 | if (runtime->avail < runtime->buffer_size) { | |
874 | runtime->buffer[runtime->hw_ptr++] = buffer[0]; | |
875 | runtime->hw_ptr %= runtime->buffer_size; | |
876 | runtime->avail++; | |
877 | result++; | |
878 | } else { | |
879 | runtime->xruns++; | |
880 | } | |
881 | } else { | |
882 | substream->bytes += count; | |
883 | count1 = runtime->buffer_size - runtime->hw_ptr; | |
884 | if (count1 > count) | |
885 | count1 = count; | |
886 | if (count1 > (int)(runtime->buffer_size - runtime->avail)) | |
887 | count1 = runtime->buffer_size - runtime->avail; | |
888 | memcpy(runtime->buffer + runtime->hw_ptr, buffer, count1); | |
889 | runtime->hw_ptr += count1; | |
890 | runtime->hw_ptr %= runtime->buffer_size; | |
891 | runtime->avail += count1; | |
892 | count -= count1; | |
893 | result += count1; | |
894 | if (count > 0) { | |
895 | buffer += count1; | |
896 | count1 = count; | |
897 | if (count1 > (int)(runtime->buffer_size - runtime->avail)) { | |
898 | count1 = runtime->buffer_size - runtime->avail; | |
899 | runtime->xruns += count - count1; | |
900 | } | |
901 | if (count1 > 0) { | |
902 | memcpy(runtime->buffer, buffer, count1); | |
903 | runtime->hw_ptr = count1; | |
904 | runtime->avail += count1; | |
905 | result += count1; | |
906 | } | |
907 | } | |
908 | } | |
909 | if (result > 0) { | |
910 | if (runtime->event) | |
1f04128a | 911 | tasklet_schedule(&runtime->tasklet); |
1da177e4 LT |
912 | else if (snd_rawmidi_ready(substream)) |
913 | wake_up(&runtime->sleep); | |
914 | } | |
915 | spin_unlock_irqrestore(&runtime->lock, flags); | |
916 | return result; | |
917 | } | |
918 | ||
48c9d417 | 919 | static long snd_rawmidi_kernel_read1(struct snd_rawmidi_substream *substream, |
17596a80 MÅš |
920 | unsigned char __user *userbuf, |
921 | unsigned char *kernelbuf, long count) | |
1da177e4 LT |
922 | { |
923 | unsigned long flags; | |
924 | long result = 0, count1; | |
48c9d417 | 925 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
1da177e4 LT |
926 | |
927 | while (count > 0 && runtime->avail) { | |
928 | count1 = runtime->buffer_size - runtime->appl_ptr; | |
929 | if (count1 > count) | |
930 | count1 = count; | |
931 | spin_lock_irqsave(&runtime->lock, flags); | |
932 | if (count1 > (int)runtime->avail) | |
933 | count1 = runtime->avail; | |
17596a80 MÅš |
934 | if (kernelbuf) |
935 | memcpy(kernelbuf + result, runtime->buffer + runtime->appl_ptr, count1); | |
936 | if (userbuf) { | |
1da177e4 | 937 | spin_unlock_irqrestore(&runtime->lock, flags); |
17596a80 | 938 | if (copy_to_user(userbuf + result, |
1da177e4 LT |
939 | runtime->buffer + runtime->appl_ptr, count1)) { |
940 | return result > 0 ? result : -EFAULT; | |
941 | } | |
942 | spin_lock_irqsave(&runtime->lock, flags); | |
943 | } | |
944 | runtime->appl_ptr += count1; | |
945 | runtime->appl_ptr %= runtime->buffer_size; | |
946 | runtime->avail -= count1; | |
947 | spin_unlock_irqrestore(&runtime->lock, flags); | |
948 | result += count1; | |
949 | count -= count1; | |
950 | } | |
951 | return result; | |
952 | } | |
953 | ||
48c9d417 TI |
954 | long snd_rawmidi_kernel_read(struct snd_rawmidi_substream *substream, |
955 | unsigned char *buf, long count) | |
1da177e4 LT |
956 | { |
957 | snd_rawmidi_input_trigger(substream, 1); | |
17596a80 | 958 | return snd_rawmidi_kernel_read1(substream, NULL/*userbuf*/, buf, count); |
1da177e4 LT |
959 | } |
960 | ||
48c9d417 TI |
961 | static ssize_t snd_rawmidi_read(struct file *file, char __user *buf, size_t count, |
962 | loff_t *offset) | |
1da177e4 LT |
963 | { |
964 | long result; | |
965 | int count1; | |
48c9d417 TI |
966 | struct snd_rawmidi_file *rfile; |
967 | struct snd_rawmidi_substream *substream; | |
968 | struct snd_rawmidi_runtime *runtime; | |
1da177e4 LT |
969 | |
970 | rfile = file->private_data; | |
971 | substream = rfile->input; | |
972 | if (substream == NULL) | |
973 | return -EIO; | |
974 | runtime = substream->runtime; | |
975 | snd_rawmidi_input_trigger(substream, 1); | |
976 | result = 0; | |
977 | while (count > 0) { | |
978 | spin_lock_irq(&runtime->lock); | |
979 | while (!snd_rawmidi_ready(substream)) { | |
980 | wait_queue_t wait; | |
981 | if ((file->f_flags & O_NONBLOCK) != 0 || result > 0) { | |
982 | spin_unlock_irq(&runtime->lock); | |
983 | return result > 0 ? result : -EAGAIN; | |
984 | } | |
985 | init_waitqueue_entry(&wait, current); | |
986 | add_wait_queue(&runtime->sleep, &wait); | |
987 | set_current_state(TASK_INTERRUPTIBLE); | |
988 | spin_unlock_irq(&runtime->lock); | |
989 | schedule(); | |
990 | remove_wait_queue(&runtime->sleep, &wait); | |
991 | if (signal_pending(current)) | |
992 | return result > 0 ? result : -ERESTARTSYS; | |
993 | if (!runtime->avail) | |
994 | return result > 0 ? result : -EIO; | |
995 | spin_lock_irq(&runtime->lock); | |
996 | } | |
997 | spin_unlock_irq(&runtime->lock); | |
4d23359b | 998 | count1 = snd_rawmidi_kernel_read1(substream, |
17596a80 MÅš |
999 | (unsigned char __user *)buf, |
1000 | NULL/*kernelbuf*/, | |
1001 | count); | |
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); | |
7eaa943c | 1109 | snd_BUG_ON(runtime->avail + count > runtime->buffer_size); |
1da177e4 LT |
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 | 1134 | { |
219df32f TI |
1135 | if (!substream->opened) |
1136 | return -EBADFD; | |
1da177e4 LT |
1137 | count = snd_rawmidi_transmit_peek(substream, buffer, count); |
1138 | if (count < 0) | |
1139 | return count; | |
1140 | return snd_rawmidi_transmit_ack(substream, count); | |
1141 | } | |
1142 | ||
48c9d417 | 1143 | static long snd_rawmidi_kernel_write1(struct snd_rawmidi_substream *substream, |
17596a80 MÅš |
1144 | const unsigned char __user *userbuf, |
1145 | const unsigned char *kernelbuf, | |
1146 | long count) | |
1da177e4 LT |
1147 | { |
1148 | unsigned long flags; | |
1149 | long count1, result; | |
48c9d417 | 1150 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
1da177e4 | 1151 | |
7eaa943c TI |
1152 | if (snd_BUG_ON(!kernelbuf && !userbuf)) |
1153 | return -EINVAL; | |
1154 | if (snd_BUG_ON(!runtime->buffer)) | |
1155 | return -EINVAL; | |
1da177e4 LT |
1156 | |
1157 | result = 0; | |
1158 | spin_lock_irqsave(&runtime->lock, flags); | |
1159 | if (substream->append) { | |
1160 | if ((long)runtime->avail < count) { | |
1161 | spin_unlock_irqrestore(&runtime->lock, flags); | |
1162 | return -EAGAIN; | |
1163 | } | |
1164 | } | |
1165 | while (count > 0 && runtime->avail > 0) { | |
1166 | count1 = runtime->buffer_size - runtime->appl_ptr; | |
1167 | if (count1 > count) | |
1168 | count1 = count; | |
1169 | if (count1 > (long)runtime->avail) | |
1170 | count1 = runtime->avail; | |
17596a80 MÅš |
1171 | if (kernelbuf) |
1172 | memcpy(runtime->buffer + runtime->appl_ptr, | |
1173 | kernelbuf + result, count1); | |
1174 | else if (userbuf) { | |
1da177e4 LT |
1175 | spin_unlock_irqrestore(&runtime->lock, flags); |
1176 | if (copy_from_user(runtime->buffer + runtime->appl_ptr, | |
17596a80 | 1177 | userbuf + result, count1)) { |
1da177e4 LT |
1178 | spin_lock_irqsave(&runtime->lock, flags); |
1179 | result = result > 0 ? result : -EFAULT; | |
1180 | goto __end; | |
1181 | } | |
1182 | spin_lock_irqsave(&runtime->lock, flags); | |
1183 | } | |
1184 | runtime->appl_ptr += count1; | |
1185 | runtime->appl_ptr %= runtime->buffer_size; | |
1186 | runtime->avail -= count1; | |
1187 | result += count1; | |
1da177e4 LT |
1188 | count -= count1; |
1189 | } | |
1190 | __end: | |
1191 | count1 = runtime->avail < runtime->buffer_size; | |
1192 | spin_unlock_irqrestore(&runtime->lock, flags); | |
1193 | if (count1) | |
1194 | snd_rawmidi_output_trigger(substream, 1); | |
1195 | return result; | |
1196 | } | |
1197 | ||
48c9d417 TI |
1198 | long snd_rawmidi_kernel_write(struct snd_rawmidi_substream *substream, |
1199 | const unsigned char *buf, long count) | |
1da177e4 | 1200 | { |
17596a80 | 1201 | return snd_rawmidi_kernel_write1(substream, NULL, buf, count); |
1da177e4 LT |
1202 | } |
1203 | ||
48c9d417 TI |
1204 | static ssize_t snd_rawmidi_write(struct file *file, const char __user *buf, |
1205 | size_t count, loff_t *offset) | |
1da177e4 LT |
1206 | { |
1207 | long result, timeout; | |
1208 | int count1; | |
48c9d417 TI |
1209 | struct snd_rawmidi_file *rfile; |
1210 | struct snd_rawmidi_runtime *runtime; | |
1211 | struct snd_rawmidi_substream *substream; | |
1da177e4 LT |
1212 | |
1213 | rfile = file->private_data; | |
1214 | substream = rfile->output; | |
1215 | runtime = substream->runtime; | |
1216 | /* we cannot put an atomic message to our buffer */ | |
1217 | if (substream->append && count > runtime->buffer_size) | |
1218 | return -EIO; | |
1219 | result = 0; | |
1220 | while (count > 0) { | |
1221 | spin_lock_irq(&runtime->lock); | |
1222 | while (!snd_rawmidi_ready_append(substream, count)) { | |
1223 | wait_queue_t wait; | |
1224 | if (file->f_flags & O_NONBLOCK) { | |
1225 | spin_unlock_irq(&runtime->lock); | |
1226 | return result > 0 ? result : -EAGAIN; | |
1227 | } | |
1228 | init_waitqueue_entry(&wait, current); | |
1229 | add_wait_queue(&runtime->sleep, &wait); | |
1230 | set_current_state(TASK_INTERRUPTIBLE); | |
1231 | spin_unlock_irq(&runtime->lock); | |
1232 | timeout = schedule_timeout(30 * HZ); | |
1233 | remove_wait_queue(&runtime->sleep, &wait); | |
1234 | if (signal_pending(current)) | |
1235 | return result > 0 ? result : -ERESTARTSYS; | |
1236 | if (!runtime->avail && !timeout) | |
1237 | return result > 0 ? result : -EIO; | |
1238 | spin_lock_irq(&runtime->lock); | |
1239 | } | |
1240 | spin_unlock_irq(&runtime->lock); | |
17596a80 | 1241 | count1 = snd_rawmidi_kernel_write1(substream, buf, NULL, count); |
1da177e4 LT |
1242 | if (count1 < 0) |
1243 | return result > 0 ? result : count1; | |
1244 | result += count1; | |
1245 | buf += count1; | |
1246 | if ((size_t)count1 < count && (file->f_flags & O_NONBLOCK)) | |
1247 | break; | |
1248 | count -= count1; | |
1249 | } | |
1250 | if (file->f_flags & O_SYNC) { | |
1251 | spin_lock_irq(&runtime->lock); | |
1252 | while (runtime->avail != runtime->buffer_size) { | |
1253 | wait_queue_t wait; | |
1254 | unsigned int last_avail = runtime->avail; | |
1255 | init_waitqueue_entry(&wait, current); | |
1256 | add_wait_queue(&runtime->sleep, &wait); | |
1257 | set_current_state(TASK_INTERRUPTIBLE); | |
1258 | spin_unlock_irq(&runtime->lock); | |
1259 | timeout = schedule_timeout(30 * HZ); | |
1260 | remove_wait_queue(&runtime->sleep, &wait); | |
1261 | if (signal_pending(current)) | |
1262 | return result > 0 ? result : -ERESTARTSYS; | |
1263 | if (runtime->avail == last_avail && !timeout) | |
1264 | return result > 0 ? result : -EIO; | |
1265 | spin_lock_irq(&runtime->lock); | |
1266 | } | |
1267 | spin_unlock_irq(&runtime->lock); | |
1268 | } | |
1269 | return result; | |
1270 | } | |
1271 | ||
1272 | static unsigned int snd_rawmidi_poll(struct file *file, poll_table * wait) | |
1273 | { | |
48c9d417 TI |
1274 | struct snd_rawmidi_file *rfile; |
1275 | struct snd_rawmidi_runtime *runtime; | |
1da177e4 LT |
1276 | unsigned int mask; |
1277 | ||
1278 | rfile = file->private_data; | |
1279 | if (rfile->input != NULL) { | |
1280 | runtime = rfile->input->runtime; | |
1281 | snd_rawmidi_input_trigger(rfile->input, 1); | |
1282 | poll_wait(file, &runtime->sleep, wait); | |
1283 | } | |
1284 | if (rfile->output != NULL) { | |
1285 | runtime = rfile->output->runtime; | |
1286 | poll_wait(file, &runtime->sleep, wait); | |
1287 | } | |
1288 | mask = 0; | |
1289 | if (rfile->input != NULL) { | |
1290 | if (snd_rawmidi_ready(rfile->input)) | |
1291 | mask |= POLLIN | POLLRDNORM; | |
1292 | } | |
1293 | if (rfile->output != NULL) { | |
1294 | if (snd_rawmidi_ready(rfile->output)) | |
1295 | mask |= POLLOUT | POLLWRNORM; | |
1296 | } | |
1297 | return mask; | |
1298 | } | |
1299 | ||
1300 | /* | |
1301 | */ | |
1302 | #ifdef CONFIG_COMPAT | |
1303 | #include "rawmidi_compat.c" | |
1304 | #else | |
1305 | #define snd_rawmidi_ioctl_compat NULL | |
1306 | #endif | |
1307 | ||
1308 | /* | |
1309 | ||
1310 | */ | |
1311 | ||
48c9d417 TI |
1312 | static void snd_rawmidi_proc_info_read(struct snd_info_entry *entry, |
1313 | struct snd_info_buffer *buffer) | |
1da177e4 | 1314 | { |
48c9d417 TI |
1315 | struct snd_rawmidi *rmidi; |
1316 | struct snd_rawmidi_substream *substream; | |
1317 | struct snd_rawmidi_runtime *runtime; | |
1da177e4 LT |
1318 | |
1319 | rmidi = entry->private_data; | |
1320 | snd_iprintf(buffer, "%s\n\n", rmidi->name); | |
1a60d4c5 | 1321 | mutex_lock(&rmidi->open_mutex); |
1da177e4 | 1322 | if (rmidi->info_flags & SNDRV_RAWMIDI_INFO_OUTPUT) { |
9244b2c3 JB |
1323 | list_for_each_entry(substream, |
1324 | &rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substreams, | |
1325 | list) { | |
1da177e4 LT |
1326 | snd_iprintf(buffer, |
1327 | "Output %d\n" | |
1328 | " Tx bytes : %lu\n", | |
1329 | substream->number, | |
1330 | (unsigned long) substream->bytes); | |
1331 | if (substream->opened) { | |
1332 | runtime = substream->runtime; | |
1333 | snd_iprintf(buffer, | |
1334 | " Mode : %s\n" | |
1335 | " Buffer size : %lu\n" | |
1336 | " Avail : %lu\n", | |
1337 | runtime->oss ? "OSS compatible" : "native", | |
1338 | (unsigned long) runtime->buffer_size, | |
1339 | (unsigned long) runtime->avail); | |
1340 | } | |
1341 | } | |
1342 | } | |
1343 | if (rmidi->info_flags & SNDRV_RAWMIDI_INFO_INPUT) { | |
9244b2c3 JB |
1344 | list_for_each_entry(substream, |
1345 | &rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substreams, | |
1346 | list) { | |
1da177e4 LT |
1347 | snd_iprintf(buffer, |
1348 | "Input %d\n" | |
1349 | " Rx bytes : %lu\n", | |
1350 | substream->number, | |
1351 | (unsigned long) substream->bytes); | |
1352 | if (substream->opened) { | |
1353 | runtime = substream->runtime; | |
1354 | snd_iprintf(buffer, | |
1355 | " Buffer size : %lu\n" | |
1356 | " Avail : %lu\n" | |
1357 | " Overruns : %lu\n", | |
1358 | (unsigned long) runtime->buffer_size, | |
1359 | (unsigned long) runtime->avail, | |
1360 | (unsigned long) runtime->xruns); | |
1361 | } | |
1362 | } | |
1363 | } | |
1a60d4c5 | 1364 | mutex_unlock(&rmidi->open_mutex); |
1da177e4 LT |
1365 | } |
1366 | ||
1367 | /* | |
1368 | * Register functions | |
1369 | */ | |
1370 | ||
9c2e08c5 | 1371 | static const struct file_operations snd_rawmidi_f_ops = |
1da177e4 LT |
1372 | { |
1373 | .owner = THIS_MODULE, | |
1374 | .read = snd_rawmidi_read, | |
1375 | .write = snd_rawmidi_write, | |
1376 | .open = snd_rawmidi_open, | |
1377 | .release = snd_rawmidi_release, | |
1378 | .poll = snd_rawmidi_poll, | |
1379 | .unlocked_ioctl = snd_rawmidi_ioctl, | |
1380 | .compat_ioctl = snd_rawmidi_ioctl_compat, | |
1381 | }; | |
1382 | ||
48c9d417 TI |
1383 | static int snd_rawmidi_alloc_substreams(struct snd_rawmidi *rmidi, |
1384 | struct snd_rawmidi_str *stream, | |
1da177e4 LT |
1385 | int direction, |
1386 | int count) | |
1387 | { | |
48c9d417 | 1388 | struct snd_rawmidi_substream *substream; |
1da177e4 LT |
1389 | int idx; |
1390 | ||
1da177e4 | 1391 | for (idx = 0; idx < count; idx++) { |
ca2c0966 | 1392 | substream = kzalloc(sizeof(*substream), GFP_KERNEL); |
73e77ba0 TI |
1393 | if (substream == NULL) { |
1394 | snd_printk(KERN_ERR "rawmidi: cannot allocate substream\n"); | |
1da177e4 | 1395 | return -ENOMEM; |
73e77ba0 | 1396 | } |
1da177e4 LT |
1397 | substream->stream = direction; |
1398 | substream->number = idx; | |
1399 | substream->rmidi = rmidi; | |
1400 | substream->pstr = stream; | |
1401 | list_add_tail(&substream->list, &stream->substreams); | |
1402 | stream->substream_count++; | |
1403 | } | |
1404 | return 0; | |
1405 | } | |
1406 | ||
1407 | /** | |
1408 | * snd_rawmidi_new - create a rawmidi instance | |
1409 | * @card: the card instance | |
1410 | * @id: the id string | |
1411 | * @device: the device index | |
1412 | * @output_count: the number of output streams | |
1413 | * @input_count: the number of input streams | |
1414 | * @rrawmidi: the pointer to store the new rawmidi instance | |
1415 | * | |
1416 | * Creates a new rawmidi instance. | |
1417 | * Use snd_rawmidi_set_ops() to set the operators to the new instance. | |
1418 | * | |
1419 | * Returns zero if successful, or a negative error code on failure. | |
1420 | */ | |
48c9d417 | 1421 | int snd_rawmidi_new(struct snd_card *card, char *id, int device, |
1da177e4 | 1422 | int output_count, int input_count, |
48c9d417 | 1423 | struct snd_rawmidi ** rrawmidi) |
1da177e4 | 1424 | { |
48c9d417 | 1425 | struct snd_rawmidi *rmidi; |
1da177e4 | 1426 | int err; |
48c9d417 | 1427 | static struct snd_device_ops ops = { |
1da177e4 LT |
1428 | .dev_free = snd_rawmidi_dev_free, |
1429 | .dev_register = snd_rawmidi_dev_register, | |
1430 | .dev_disconnect = snd_rawmidi_dev_disconnect, | |
1da177e4 LT |
1431 | }; |
1432 | ||
7eaa943c TI |
1433 | if (snd_BUG_ON(!card)) |
1434 | return -ENXIO; | |
1435 | if (rrawmidi) | |
1436 | *rrawmidi = NULL; | |
ca2c0966 | 1437 | rmidi = kzalloc(sizeof(*rmidi), GFP_KERNEL); |
73e77ba0 TI |
1438 | if (rmidi == NULL) { |
1439 | snd_printk(KERN_ERR "rawmidi: cannot allocate\n"); | |
1da177e4 | 1440 | return -ENOMEM; |
73e77ba0 | 1441 | } |
1da177e4 LT |
1442 | rmidi->card = card; |
1443 | rmidi->device = device; | |
1a60d4c5 | 1444 | mutex_init(&rmidi->open_mutex); |
1da177e4 | 1445 | init_waitqueue_head(&rmidi->open_wait); |
c13893d7 AM |
1446 | INIT_LIST_HEAD(&rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substreams); |
1447 | INIT_LIST_HEAD(&rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substreams); | |
1448 | ||
1da177e4 LT |
1449 | if (id != NULL) |
1450 | strlcpy(rmidi->id, id, sizeof(rmidi->id)); | |
73e77ba0 TI |
1451 | if ((err = snd_rawmidi_alloc_substreams(rmidi, |
1452 | &rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT], | |
1453 | SNDRV_RAWMIDI_STREAM_INPUT, | |
1454 | input_count)) < 0) { | |
1da177e4 LT |
1455 | snd_rawmidi_free(rmidi); |
1456 | return err; | |
1457 | } | |
73e77ba0 TI |
1458 | if ((err = snd_rawmidi_alloc_substreams(rmidi, |
1459 | &rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT], | |
1460 | SNDRV_RAWMIDI_STREAM_OUTPUT, | |
1461 | output_count)) < 0) { | |
1da177e4 LT |
1462 | snd_rawmidi_free(rmidi); |
1463 | return err; | |
1464 | } | |
1465 | if ((err = snd_device_new(card, SNDRV_DEV_RAWMIDI, rmidi, &ops)) < 0) { | |
1466 | snd_rawmidi_free(rmidi); | |
1467 | return err; | |
1468 | } | |
7eaa943c TI |
1469 | if (rrawmidi) |
1470 | *rrawmidi = rmidi; | |
1da177e4 LT |
1471 | return 0; |
1472 | } | |
1473 | ||
48c9d417 | 1474 | static void snd_rawmidi_free_substreams(struct snd_rawmidi_str *stream) |
1da177e4 | 1475 | { |
48c9d417 | 1476 | struct snd_rawmidi_substream *substream; |
1da177e4 LT |
1477 | |
1478 | while (!list_empty(&stream->substreams)) { | |
48c9d417 | 1479 | substream = list_entry(stream->substreams.next, struct snd_rawmidi_substream, list); |
1da177e4 LT |
1480 | list_del(&substream->list); |
1481 | kfree(substream); | |
1482 | } | |
1483 | } | |
1484 | ||
48c9d417 | 1485 | static int snd_rawmidi_free(struct snd_rawmidi *rmidi) |
1da177e4 | 1486 | { |
7eaa943c TI |
1487 | if (!rmidi) |
1488 | return 0; | |
c461482c TI |
1489 | |
1490 | snd_info_free_entry(rmidi->proc_entry); | |
1491 | rmidi->proc_entry = NULL; | |
1492 | mutex_lock(®ister_mutex); | |
1493 | if (rmidi->ops && rmidi->ops->dev_unregister) | |
1494 | rmidi->ops->dev_unregister(rmidi); | |
1495 | mutex_unlock(®ister_mutex); | |
1496 | ||
1da177e4 LT |
1497 | snd_rawmidi_free_substreams(&rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT]); |
1498 | snd_rawmidi_free_substreams(&rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT]); | |
1499 | if (rmidi->private_free) | |
1500 | rmidi->private_free(rmidi); | |
1501 | kfree(rmidi); | |
1502 | return 0; | |
1503 | } | |
1504 | ||
48c9d417 | 1505 | static int snd_rawmidi_dev_free(struct snd_device *device) |
1da177e4 | 1506 | { |
48c9d417 | 1507 | struct snd_rawmidi *rmidi = device->device_data; |
1da177e4 LT |
1508 | return snd_rawmidi_free(rmidi); |
1509 | } | |
1510 | ||
1511 | #if defined(CONFIG_SND_SEQUENCER) || (defined(MODULE) && defined(CONFIG_SND_SEQUENCER_MODULE)) | |
48c9d417 | 1512 | static void snd_rawmidi_dev_seq_free(struct snd_seq_device *device) |
1da177e4 | 1513 | { |
48c9d417 | 1514 | struct snd_rawmidi *rmidi = device->private_data; |
1da177e4 LT |
1515 | rmidi->seq_dev = NULL; |
1516 | } | |
1517 | #endif | |
1518 | ||
48c9d417 | 1519 | static int snd_rawmidi_dev_register(struct snd_device *device) |
1da177e4 | 1520 | { |
f87135f5 | 1521 | int err; |
48c9d417 | 1522 | struct snd_info_entry *entry; |
1da177e4 | 1523 | char name[16]; |
48c9d417 | 1524 | struct snd_rawmidi *rmidi = device->device_data; |
1da177e4 LT |
1525 | |
1526 | if (rmidi->device >= SNDRV_RAWMIDI_DEVICES) | |
1527 | return -ENOMEM; | |
1a60d4c5 | 1528 | mutex_lock(®ister_mutex); |
f87135f5 | 1529 | if (snd_rawmidi_search(rmidi->card, rmidi->device)) { |
1a60d4c5 | 1530 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
1531 | return -EBUSY; |
1532 | } | |
f87135f5 | 1533 | list_add_tail(&rmidi->list, &snd_rawmidi_devices); |
1da177e4 LT |
1534 | sprintf(name, "midiC%iD%i", rmidi->card->number, rmidi->device); |
1535 | if ((err = snd_register_device(SNDRV_DEVICE_TYPE_RAWMIDI, | |
1536 | rmidi->card, rmidi->device, | |
f87135f5 | 1537 | &snd_rawmidi_f_ops, rmidi, name)) < 0) { |
1da177e4 | 1538 | snd_printk(KERN_ERR "unable to register rawmidi device %i:%i\n", rmidi->card->number, rmidi->device); |
f87135f5 | 1539 | list_del(&rmidi->list); |
1a60d4c5 | 1540 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
1541 | return err; |
1542 | } | |
1543 | if (rmidi->ops && rmidi->ops->dev_register && | |
1544 | (err = rmidi->ops->dev_register(rmidi)) < 0) { | |
1545 | snd_unregister_device(SNDRV_DEVICE_TYPE_RAWMIDI, rmidi->card, rmidi->device); | |
f87135f5 | 1546 | list_del(&rmidi->list); |
1a60d4c5 | 1547 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
1548 | return err; |
1549 | } | |
1550 | #ifdef CONFIG_SND_OSSEMUL | |
1551 | rmidi->ossreg = 0; | |
1552 | if ((int)rmidi->device == midi_map[rmidi->card->number]) { | |
1553 | if (snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_MIDI, | |
f87135f5 CL |
1554 | rmidi->card, 0, &snd_rawmidi_f_ops, |
1555 | rmidi, name) < 0) { | |
1da177e4 LT |
1556 | snd_printk(KERN_ERR "unable to register OSS rawmidi device %i:%i\n", rmidi->card->number, 0); |
1557 | } else { | |
1558 | rmidi->ossreg++; | |
1559 | #ifdef SNDRV_OSS_INFO_DEV_MIDI | |
1560 | snd_oss_info_register(SNDRV_OSS_INFO_DEV_MIDI, rmidi->card->number, rmidi->name); | |
1561 | #endif | |
1562 | } | |
1563 | } | |
1564 | if ((int)rmidi->device == amidi_map[rmidi->card->number]) { | |
1565 | if (snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_MIDI, | |
f87135f5 CL |
1566 | rmidi->card, 1, &snd_rawmidi_f_ops, |
1567 | rmidi, name) < 0) { | |
1da177e4 LT |
1568 | snd_printk(KERN_ERR "unable to register OSS rawmidi device %i:%i\n", rmidi->card->number, 1); |
1569 | } else { | |
1570 | rmidi->ossreg++; | |
1571 | } | |
1572 | } | |
1573 | #endif /* CONFIG_SND_OSSEMUL */ | |
1a60d4c5 | 1574 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
1575 | sprintf(name, "midi%d", rmidi->device); |
1576 | entry = snd_info_create_card_entry(rmidi->card, name, rmidi->card->proc_root); | |
1577 | if (entry) { | |
1578 | entry->private_data = rmidi; | |
1da177e4 LT |
1579 | entry->c.text.read = snd_rawmidi_proc_info_read; |
1580 | if (snd_info_register(entry) < 0) { | |
1581 | snd_info_free_entry(entry); | |
1582 | entry = NULL; | |
1583 | } | |
1584 | } | |
1585 | rmidi->proc_entry = entry; | |
1586 | #if defined(CONFIG_SND_SEQUENCER) || (defined(MODULE) && defined(CONFIG_SND_SEQUENCER_MODULE)) | |
1587 | if (!rmidi->ops || !rmidi->ops->dev_register) { /* own registration mechanism */ | |
1588 | if (snd_seq_device_new(rmidi->card, rmidi->device, SNDRV_SEQ_DEV_ID_MIDISYNTH, 0, &rmidi->seq_dev) >= 0) { | |
1589 | rmidi->seq_dev->private_data = rmidi; | |
1590 | rmidi->seq_dev->private_free = snd_rawmidi_dev_seq_free; | |
1591 | sprintf(rmidi->seq_dev->name, "MIDI %d-%d", rmidi->card->number, rmidi->device); | |
1592 | snd_device_register(rmidi->card, rmidi->seq_dev); | |
1593 | } | |
1594 | } | |
1595 | #endif | |
1596 | return 0; | |
1597 | } | |
1598 | ||
48c9d417 | 1599 | static int snd_rawmidi_dev_disconnect(struct snd_device *device) |
1da177e4 | 1600 | { |
48c9d417 | 1601 | struct snd_rawmidi *rmidi = device->device_data; |
1da177e4 | 1602 | |
1a60d4c5 | 1603 | mutex_lock(®ister_mutex); |
f87135f5 | 1604 | list_del_init(&rmidi->list); |
1da177e4 LT |
1605 | #ifdef CONFIG_SND_OSSEMUL |
1606 | if (rmidi->ossreg) { | |
1607 | if ((int)rmidi->device == midi_map[rmidi->card->number]) { | |
1608 | snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_MIDI, rmidi->card, 0); | |
1609 | #ifdef SNDRV_OSS_INFO_DEV_MIDI | |
1610 | snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_MIDI, rmidi->card->number); | |
1611 | #endif | |
1612 | } | |
1613 | if ((int)rmidi->device == amidi_map[rmidi->card->number]) | |
1614 | snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_MIDI, rmidi->card, 1); | |
1615 | rmidi->ossreg = 0; | |
1616 | } | |
1617 | #endif /* CONFIG_SND_OSSEMUL */ | |
1da177e4 | 1618 | snd_unregister_device(SNDRV_DEVICE_TYPE_RAWMIDI, rmidi->card, rmidi->device); |
1a60d4c5 | 1619 | mutex_unlock(®ister_mutex); |
c461482c | 1620 | return 0; |
1da177e4 LT |
1621 | } |
1622 | ||
1623 | /** | |
1624 | * snd_rawmidi_set_ops - set the rawmidi operators | |
1625 | * @rmidi: the rawmidi instance | |
1626 | * @stream: the stream direction, SNDRV_RAWMIDI_STREAM_XXX | |
1627 | * @ops: the operator table | |
1628 | * | |
1629 | * Sets the rawmidi operators for the given stream direction. | |
1630 | */ | |
48c9d417 TI |
1631 | void snd_rawmidi_set_ops(struct snd_rawmidi *rmidi, int stream, |
1632 | struct snd_rawmidi_ops *ops) | |
1da177e4 | 1633 | { |
48c9d417 | 1634 | struct snd_rawmidi_substream *substream; |
1da177e4 | 1635 | |
9244b2c3 | 1636 | list_for_each_entry(substream, &rmidi->streams[stream].substreams, list) |
1da177e4 | 1637 | substream->ops = ops; |
1da177e4 LT |
1638 | } |
1639 | ||
1640 | /* | |
1641 | * ENTRY functions | |
1642 | */ | |
1643 | ||
1644 | static int __init alsa_rawmidi_init(void) | |
1645 | { | |
1646 | ||
1647 | snd_ctl_register_ioctl(snd_rawmidi_control_ioctl); | |
1648 | snd_ctl_register_ioctl_compat(snd_rawmidi_control_ioctl); | |
1649 | #ifdef CONFIG_SND_OSSEMUL | |
1650 | { int i; | |
1651 | /* check device map table */ | |
1652 | for (i = 0; i < SNDRV_CARDS; i++) { | |
1653 | if (midi_map[i] < 0 || midi_map[i] >= SNDRV_RAWMIDI_DEVICES) { | |
1654 | snd_printk(KERN_ERR "invalid midi_map[%d] = %d\n", i, midi_map[i]); | |
1655 | midi_map[i] = 0; | |
1656 | } | |
1657 | if (amidi_map[i] < 0 || amidi_map[i] >= SNDRV_RAWMIDI_DEVICES) { | |
1658 | snd_printk(KERN_ERR "invalid amidi_map[%d] = %d\n", i, amidi_map[i]); | |
1659 | amidi_map[i] = 1; | |
1660 | } | |
1661 | } | |
1662 | } | |
1663 | #endif /* CONFIG_SND_OSSEMUL */ | |
1664 | return 0; | |
1665 | } | |
1666 | ||
1667 | static void __exit alsa_rawmidi_exit(void) | |
1668 | { | |
1669 | snd_ctl_unregister_ioctl(snd_rawmidi_control_ioctl); | |
1670 | snd_ctl_unregister_ioctl_compat(snd_rawmidi_control_ioctl); | |
1671 | } | |
1672 | ||
1673 | module_init(alsa_rawmidi_init) | |
1674 | module_exit(alsa_rawmidi_exit) | |
1675 | ||
1676 | EXPORT_SYMBOL(snd_rawmidi_output_params); | |
1677 | EXPORT_SYMBOL(snd_rawmidi_input_params); | |
1678 | EXPORT_SYMBOL(snd_rawmidi_drop_output); | |
1679 | EXPORT_SYMBOL(snd_rawmidi_drain_output); | |
1680 | EXPORT_SYMBOL(snd_rawmidi_drain_input); | |
1681 | EXPORT_SYMBOL(snd_rawmidi_receive); | |
1682 | EXPORT_SYMBOL(snd_rawmidi_transmit_empty); | |
1683 | EXPORT_SYMBOL(snd_rawmidi_transmit_peek); | |
1684 | EXPORT_SYMBOL(snd_rawmidi_transmit_ack); | |
1685 | EXPORT_SYMBOL(snd_rawmidi_transmit); | |
1686 | EXPORT_SYMBOL(snd_rawmidi_new); | |
1687 | EXPORT_SYMBOL(snd_rawmidi_set_ops); | |
1da177e4 LT |
1688 | EXPORT_SYMBOL(snd_rawmidi_info_select); |
1689 | EXPORT_SYMBOL(snd_rawmidi_kernel_open); | |
1690 | EXPORT_SYMBOL(snd_rawmidi_kernel_release); | |
1691 | EXPORT_SYMBOL(snd_rawmidi_kernel_read); | |
1692 | EXPORT_SYMBOL(snd_rawmidi_kernel_write); |