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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * Abstract layer for MIDI v1.0 stream | |
3 | * Copyright (c) by Jaroslav Kysela <perex@suse.cz> | |
4 | * | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation; either version 2 of the License, or | |
9 | * (at your option) any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with this program; if not, write to the Free Software | |
18 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
19 | * | |
20 | */ | |
21 | ||
22 | #include <sound/driver.h> | |
23 | #include <sound/core.h> | |
24 | #include <linux/major.h> | |
25 | #include <linux/init.h> | |
26 | #include <linux/smp_lock.h> | |
27 | #include <linux/sched.h> | |
28 | #include <linux/slab.h> | |
29 | #include <linux/time.h> | |
30 | #include <linux/wait.h> | |
1a60d4c5 | 31 | #include <linux/mutex.h> |
1da177e4 LT |
32 | #include <linux/moduleparam.h> |
33 | #include <linux/delay.h> | |
34 | #include <linux/wait.h> | |
35 | #include <sound/rawmidi.h> | |
36 | #include <sound/info.h> | |
37 | #include <sound/control.h> | |
38 | #include <sound/minors.h> | |
39 | #include <sound/initval.h> | |
40 | ||
41 | MODULE_AUTHOR("Jaroslav Kysela <perex@suse.cz>"); | |
42 | MODULE_DESCRIPTION("Midlevel RawMidi code for ALSA."); | |
43 | MODULE_LICENSE("GPL"); | |
44 | ||
45 | #ifdef CONFIG_SND_OSSEMUL | |
6581f4e7 | 46 | static int midi_map[SNDRV_CARDS]; |
1da177e4 LT |
47 | static int amidi_map[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS-1)] = 1}; |
48 | module_param_array(midi_map, int, NULL, 0444); | |
49 | MODULE_PARM_DESC(midi_map, "Raw MIDI device number assigned to 1st OSS device."); | |
50 | module_param_array(amidi_map, int, NULL, 0444); | |
51 | MODULE_PARM_DESC(amidi_map, "Raw MIDI device number assigned to 2nd OSS device."); | |
52 | #endif /* CONFIG_SND_OSSEMUL */ | |
53 | ||
48c9d417 TI |
54 | static int snd_rawmidi_free(struct snd_rawmidi *rawmidi); |
55 | static int snd_rawmidi_dev_free(struct snd_device *device); | |
56 | static int snd_rawmidi_dev_register(struct snd_device *device); | |
57 | static int snd_rawmidi_dev_disconnect(struct snd_device *device); | |
1da177e4 | 58 | |
f87135f5 | 59 | static LIST_HEAD(snd_rawmidi_devices); |
1a60d4c5 | 60 | static DEFINE_MUTEX(register_mutex); |
1da177e4 | 61 | |
f87135f5 CL |
62 | static struct snd_rawmidi *snd_rawmidi_search(struct snd_card *card, int device) |
63 | { | |
64 | struct list_head *p; | |
65 | struct snd_rawmidi *rawmidi; | |
66 | ||
67 | list_for_each(p, &snd_rawmidi_devices) { | |
68 | rawmidi = list_entry(p, struct snd_rawmidi, list); | |
69 | if (rawmidi->card == card && rawmidi->device == device) | |
70 | return rawmidi; | |
71 | } | |
72 | return NULL; | |
73 | } | |
74 | ||
1da177e4 LT |
75 | static inline unsigned short snd_rawmidi_file_flags(struct file *file) |
76 | { | |
77 | switch (file->f_mode & (FMODE_READ | FMODE_WRITE)) { | |
78 | case FMODE_WRITE: | |
79 | return SNDRV_RAWMIDI_LFLG_OUTPUT; | |
80 | case FMODE_READ: | |
81 | return SNDRV_RAWMIDI_LFLG_INPUT; | |
82 | default: | |
83 | return SNDRV_RAWMIDI_LFLG_OPEN; | |
84 | } | |
85 | } | |
86 | ||
48c9d417 | 87 | static inline int snd_rawmidi_ready(struct snd_rawmidi_substream *substream) |
1da177e4 | 88 | { |
48c9d417 | 89 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
1da177e4 LT |
90 | return runtime->avail >= runtime->avail_min; |
91 | } | |
92 | ||
48c9d417 TI |
93 | static inline int snd_rawmidi_ready_append(struct snd_rawmidi_substream *substream, |
94 | size_t count) | |
1da177e4 | 95 | { |
48c9d417 | 96 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
1da177e4 LT |
97 | return runtime->avail >= runtime->avail_min && |
98 | (!substream->append || runtime->avail >= count); | |
99 | } | |
100 | ||
101 | static void snd_rawmidi_input_event_tasklet(unsigned long data) | |
102 | { | |
48c9d417 | 103 | struct snd_rawmidi_substream *substream = (struct snd_rawmidi_substream *)data; |
1da177e4 LT |
104 | substream->runtime->event(substream); |
105 | } | |
106 | ||
107 | static void snd_rawmidi_output_trigger_tasklet(unsigned long data) | |
108 | { | |
48c9d417 | 109 | struct snd_rawmidi_substream *substream = (struct snd_rawmidi_substream *)data; |
1da177e4 LT |
110 | substream->ops->trigger(substream, 1); |
111 | } | |
112 | ||
48c9d417 | 113 | static int snd_rawmidi_runtime_create(struct snd_rawmidi_substream *substream) |
1da177e4 | 114 | { |
48c9d417 | 115 | struct snd_rawmidi_runtime *runtime; |
1da177e4 | 116 | |
ca2c0966 | 117 | if ((runtime = kzalloc(sizeof(*runtime), GFP_KERNEL)) == NULL) |
1da177e4 LT |
118 | return -ENOMEM; |
119 | spin_lock_init(&runtime->lock); | |
120 | init_waitqueue_head(&runtime->sleep); | |
121 | if (substream->stream == SNDRV_RAWMIDI_STREAM_INPUT) | |
122 | tasklet_init(&runtime->tasklet, | |
123 | snd_rawmidi_input_event_tasklet, | |
124 | (unsigned long)substream); | |
125 | else | |
126 | tasklet_init(&runtime->tasklet, | |
127 | snd_rawmidi_output_trigger_tasklet, | |
128 | (unsigned long)substream); | |
129 | runtime->event = NULL; | |
130 | runtime->buffer_size = PAGE_SIZE; | |
131 | runtime->avail_min = 1; | |
132 | if (substream->stream == SNDRV_RAWMIDI_STREAM_INPUT) | |
133 | runtime->avail = 0; | |
134 | else | |
135 | runtime->avail = runtime->buffer_size; | |
136 | if ((runtime->buffer = kmalloc(runtime->buffer_size, GFP_KERNEL)) == NULL) { | |
137 | kfree(runtime); | |
138 | return -ENOMEM; | |
139 | } | |
140 | runtime->appl_ptr = runtime->hw_ptr = 0; | |
141 | substream->runtime = runtime; | |
142 | return 0; | |
143 | } | |
144 | ||
48c9d417 | 145 | static int snd_rawmidi_runtime_free(struct snd_rawmidi_substream *substream) |
1da177e4 | 146 | { |
48c9d417 | 147 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
1da177e4 LT |
148 | |
149 | kfree(runtime->buffer); | |
150 | kfree(runtime); | |
151 | substream->runtime = NULL; | |
152 | return 0; | |
153 | } | |
154 | ||
48c9d417 | 155 | static inline void snd_rawmidi_output_trigger(struct snd_rawmidi_substream *substream,int up) |
1da177e4 LT |
156 | { |
157 | if (up) { | |
158 | tasklet_hi_schedule(&substream->runtime->tasklet); | |
159 | } else { | |
160 | tasklet_kill(&substream->runtime->tasklet); | |
161 | substream->ops->trigger(substream, 0); | |
162 | } | |
163 | } | |
164 | ||
48c9d417 | 165 | static void snd_rawmidi_input_trigger(struct snd_rawmidi_substream *substream, int up) |
1da177e4 LT |
166 | { |
167 | substream->ops->trigger(substream, up); | |
168 | if (!up && substream->runtime->event) | |
169 | tasklet_kill(&substream->runtime->tasklet); | |
170 | } | |
171 | ||
48c9d417 | 172 | int snd_rawmidi_drop_output(struct snd_rawmidi_substream *substream) |
1da177e4 LT |
173 | { |
174 | unsigned long flags; | |
48c9d417 | 175 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
1da177e4 LT |
176 | |
177 | snd_rawmidi_output_trigger(substream, 0); | |
178 | runtime->drain = 0; | |
179 | spin_lock_irqsave(&runtime->lock, flags); | |
180 | runtime->appl_ptr = runtime->hw_ptr = 0; | |
181 | runtime->avail = runtime->buffer_size; | |
182 | spin_unlock_irqrestore(&runtime->lock, flags); | |
183 | return 0; | |
184 | } | |
185 | ||
48c9d417 | 186 | int snd_rawmidi_drain_output(struct snd_rawmidi_substream *substream) |
1da177e4 LT |
187 | { |
188 | int err; | |
189 | long timeout; | |
48c9d417 | 190 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
1da177e4 LT |
191 | |
192 | err = 0; | |
193 | runtime->drain = 1; | |
194 | timeout = wait_event_interruptible_timeout(runtime->sleep, | |
195 | (runtime->avail >= runtime->buffer_size), | |
196 | 10*HZ); | |
197 | if (signal_pending(current)) | |
198 | err = -ERESTARTSYS; | |
199 | if (runtime->avail < runtime->buffer_size && !timeout) { | |
200 | snd_printk(KERN_WARNING "rawmidi drain error (avail = %li, buffer_size = %li)\n", (long)runtime->avail, (long)runtime->buffer_size); | |
201 | err = -EIO; | |
202 | } | |
203 | runtime->drain = 0; | |
204 | if (err != -ERESTARTSYS) { | |
205 | /* we need wait a while to make sure that Tx FIFOs are empty */ | |
206 | if (substream->ops->drain) | |
207 | substream->ops->drain(substream); | |
208 | else | |
209 | msleep(50); | |
210 | snd_rawmidi_drop_output(substream); | |
211 | } | |
212 | return err; | |
213 | } | |
214 | ||
48c9d417 | 215 | int snd_rawmidi_drain_input(struct snd_rawmidi_substream *substream) |
1da177e4 LT |
216 | { |
217 | unsigned long flags; | |
48c9d417 | 218 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
1da177e4 LT |
219 | |
220 | snd_rawmidi_input_trigger(substream, 0); | |
221 | runtime->drain = 0; | |
222 | spin_lock_irqsave(&runtime->lock, flags); | |
223 | runtime->appl_ptr = runtime->hw_ptr = 0; | |
224 | runtime->avail = 0; | |
225 | spin_unlock_irqrestore(&runtime->lock, flags); | |
226 | return 0; | |
227 | } | |
228 | ||
f87135f5 | 229 | int snd_rawmidi_kernel_open(struct snd_card *card, int device, int subdevice, |
48c9d417 | 230 | int mode, struct snd_rawmidi_file * rfile) |
1da177e4 | 231 | { |
48c9d417 | 232 | struct snd_rawmidi *rmidi; |
1da177e4 | 233 | struct list_head *list1, *list2; |
48c9d417 TI |
234 | struct snd_rawmidi_substream *sinput = NULL, *soutput = NULL; |
235 | struct snd_rawmidi_runtime *input = NULL, *output = NULL; | |
1da177e4 LT |
236 | int err; |
237 | ||
238 | if (rfile) | |
239 | rfile->input = rfile->output = NULL; | |
1a60d4c5 | 240 | mutex_lock(®ister_mutex); |
f87135f5 | 241 | rmidi = snd_rawmidi_search(card, device); |
1a60d4c5 | 242 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
243 | if (rmidi == NULL) { |
244 | err = -ENODEV; | |
245 | goto __error1; | |
246 | } | |
247 | if (!try_module_get(rmidi->card->module)) { | |
248 | err = -EFAULT; | |
249 | goto __error1; | |
250 | } | |
251 | if (!(mode & SNDRV_RAWMIDI_LFLG_NOOPENLOCK)) | |
1a60d4c5 | 252 | mutex_lock(&rmidi->open_mutex); |
1da177e4 LT |
253 | if (mode & SNDRV_RAWMIDI_LFLG_INPUT) { |
254 | if (!(rmidi->info_flags & SNDRV_RAWMIDI_INFO_INPUT)) { | |
255 | err = -ENXIO; | |
256 | goto __error; | |
257 | } | |
258 | if (subdevice >= 0 && (unsigned int)subdevice >= rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substream_count) { | |
259 | err = -ENODEV; | |
260 | goto __error; | |
261 | } | |
262 | if (rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substream_opened >= | |
263 | rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substream_count) { | |
264 | err = -EAGAIN; | |
265 | goto __error; | |
266 | } | |
267 | } | |
268 | if (mode & SNDRV_RAWMIDI_LFLG_OUTPUT) { | |
269 | if (!(rmidi->info_flags & SNDRV_RAWMIDI_INFO_OUTPUT)) { | |
270 | err = -ENXIO; | |
271 | goto __error; | |
272 | } | |
273 | if (subdevice >= 0 && (unsigned int)subdevice >= rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substream_count) { | |
274 | err = -ENODEV; | |
275 | goto __error; | |
276 | } | |
277 | if (rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substream_opened >= | |
278 | rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substream_count) { | |
279 | err = -EAGAIN; | |
280 | goto __error; | |
281 | } | |
282 | } | |
283 | list1 = rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substreams.next; | |
284 | while (1) { | |
285 | if (list1 == &rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substreams) { | |
286 | sinput = NULL; | |
287 | if (mode & SNDRV_RAWMIDI_LFLG_INPUT) { | |
288 | err = -EAGAIN; | |
289 | goto __error; | |
290 | } | |
291 | break; | |
292 | } | |
48c9d417 | 293 | sinput = list_entry(list1, struct snd_rawmidi_substream, list); |
1da177e4 LT |
294 | if ((mode & SNDRV_RAWMIDI_LFLG_INPUT) && sinput->opened) |
295 | goto __nexti; | |
296 | if (subdevice < 0 || (subdevice >= 0 && subdevice == sinput->number)) | |
297 | break; | |
298 | __nexti: | |
299 | list1 = list1->next; | |
300 | } | |
301 | list2 = rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substreams.next; | |
302 | while (1) { | |
303 | if (list2 == &rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substreams) { | |
304 | soutput = NULL; | |
305 | if (mode & SNDRV_RAWMIDI_LFLG_OUTPUT) { | |
306 | err = -EAGAIN; | |
307 | goto __error; | |
308 | } | |
309 | break; | |
310 | } | |
48c9d417 | 311 | soutput = list_entry(list2, struct snd_rawmidi_substream, list); |
1da177e4 LT |
312 | if (mode & SNDRV_RAWMIDI_LFLG_OUTPUT) { |
313 | if (mode & SNDRV_RAWMIDI_LFLG_APPEND) { | |
314 | if (soutput->opened && !soutput->append) | |
315 | goto __nexto; | |
316 | } else { | |
317 | if (soutput->opened) | |
318 | goto __nexto; | |
319 | } | |
320 | } | |
321 | if (subdevice < 0 || (subdevice >= 0 && subdevice == soutput->number)) | |
322 | break; | |
323 | __nexto: | |
324 | list2 = list2->next; | |
325 | } | |
326 | if (mode & SNDRV_RAWMIDI_LFLG_INPUT) { | |
327 | if ((err = snd_rawmidi_runtime_create(sinput)) < 0) | |
328 | goto __error; | |
329 | input = sinput->runtime; | |
330 | if ((err = sinput->ops->open(sinput)) < 0) | |
331 | goto __error; | |
332 | sinput->opened = 1; | |
333 | rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substream_opened++; | |
334 | } else { | |
335 | sinput = NULL; | |
336 | } | |
337 | if (mode & SNDRV_RAWMIDI_LFLG_OUTPUT) { | |
338 | if (soutput->opened) | |
339 | goto __skip_output; | |
340 | if ((err = snd_rawmidi_runtime_create(soutput)) < 0) { | |
341 | if (mode & SNDRV_RAWMIDI_LFLG_INPUT) | |
342 | sinput->ops->close(sinput); | |
343 | goto __error; | |
344 | } | |
345 | output = soutput->runtime; | |
346 | if ((err = soutput->ops->open(soutput)) < 0) { | |
347 | if (mode & SNDRV_RAWMIDI_LFLG_INPUT) | |
348 | sinput->ops->close(sinput); | |
349 | goto __error; | |
350 | } | |
351 | __skip_output: | |
352 | soutput->opened = 1; | |
353 | if (mode & SNDRV_RAWMIDI_LFLG_APPEND) | |
354 | soutput->append = 1; | |
355 | if (soutput->use_count++ == 0) | |
356 | soutput->active_sensing = 1; | |
357 | rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substream_opened++; | |
358 | } else { | |
359 | soutput = NULL; | |
360 | } | |
361 | if (!(mode & SNDRV_RAWMIDI_LFLG_NOOPENLOCK)) | |
1a60d4c5 | 362 | mutex_unlock(&rmidi->open_mutex); |
1da177e4 LT |
363 | if (rfile) { |
364 | rfile->rmidi = rmidi; | |
365 | rfile->input = sinput; | |
366 | rfile->output = soutput; | |
367 | } | |
368 | return 0; | |
369 | ||
370 | __error: | |
371 | if (input != NULL) | |
372 | snd_rawmidi_runtime_free(sinput); | |
373 | if (output != NULL) | |
374 | snd_rawmidi_runtime_free(soutput); | |
375 | module_put(rmidi->card->module); | |
376 | if (!(mode & SNDRV_RAWMIDI_LFLG_NOOPENLOCK)) | |
1a60d4c5 | 377 | mutex_unlock(&rmidi->open_mutex); |
1da177e4 LT |
378 | __error1: |
379 | return err; | |
380 | } | |
381 | ||
382 | static int snd_rawmidi_open(struct inode *inode, struct file *file) | |
383 | { | |
384 | int maj = imajor(inode); | |
48c9d417 | 385 | struct snd_card *card; |
f87135f5 | 386 | int subdevice; |
1da177e4 LT |
387 | unsigned short fflags; |
388 | int err; | |
48c9d417 TI |
389 | struct snd_rawmidi *rmidi; |
390 | struct snd_rawmidi_file *rawmidi_file; | |
1da177e4 LT |
391 | wait_queue_t wait; |
392 | struct list_head *list; | |
48c9d417 | 393 | struct snd_ctl_file *kctl; |
1da177e4 | 394 | |
f1902860 | 395 | if (maj == snd_major) { |
f87135f5 CL |
396 | rmidi = snd_lookup_minor_data(iminor(inode), |
397 | SNDRV_DEVICE_TYPE_RAWMIDI); | |
1da177e4 | 398 | #ifdef CONFIG_SND_OSSEMUL |
f1902860 | 399 | } else if (maj == SOUND_MAJOR) { |
f87135f5 CL |
400 | rmidi = snd_lookup_oss_minor_data(iminor(inode), |
401 | SNDRV_OSS_DEVICE_TYPE_MIDI); | |
1da177e4 | 402 | #endif |
f1902860 | 403 | } else |
1da177e4 | 404 | return -ENXIO; |
1da177e4 | 405 | |
1da177e4 LT |
406 | if (rmidi == NULL) |
407 | return -ENODEV; | |
1da177e4 LT |
408 | if ((file->f_flags & O_APPEND) && !(file->f_flags & O_NONBLOCK)) |
409 | return -EINVAL; /* invalid combination */ | |
410 | card = rmidi->card; | |
411 | err = snd_card_file_add(card, file); | |
412 | if (err < 0) | |
413 | return -ENODEV; | |
414 | fflags = snd_rawmidi_file_flags(file); | |
f1902860 | 415 | if ((file->f_flags & O_APPEND) || maj == SOUND_MAJOR) /* OSS emul? */ |
1da177e4 LT |
416 | fflags |= SNDRV_RAWMIDI_LFLG_APPEND; |
417 | fflags |= SNDRV_RAWMIDI_LFLG_NOOPENLOCK; | |
418 | rawmidi_file = kmalloc(sizeof(*rawmidi_file), GFP_KERNEL); | |
419 | if (rawmidi_file == NULL) { | |
420 | snd_card_file_remove(card, file); | |
421 | return -ENOMEM; | |
422 | } | |
423 | init_waitqueue_entry(&wait, current); | |
424 | add_wait_queue(&rmidi->open_wait, &wait); | |
1a60d4c5 | 425 | mutex_lock(&rmidi->open_mutex); |
1da177e4 LT |
426 | while (1) { |
427 | subdevice = -1; | |
428 | down_read(&card->controls_rwsem); | |
429 | list_for_each(list, &card->ctl_files) { | |
430 | kctl = snd_ctl_file(list); | |
431 | if (kctl->pid == current->pid) { | |
432 | subdevice = kctl->prefer_rawmidi_subdevice; | |
2529bba7 TI |
433 | if (subdevice != -1) |
434 | break; | |
1da177e4 LT |
435 | } |
436 | } | |
437 | up_read(&card->controls_rwsem); | |
f87135f5 CL |
438 | err = snd_rawmidi_kernel_open(rmidi->card, rmidi->device, |
439 | subdevice, fflags, rawmidi_file); | |
1da177e4 LT |
440 | if (err >= 0) |
441 | break; | |
442 | if (err == -EAGAIN) { | |
443 | if (file->f_flags & O_NONBLOCK) { | |
444 | err = -EBUSY; | |
445 | break; | |
446 | } | |
447 | } else | |
448 | break; | |
449 | set_current_state(TASK_INTERRUPTIBLE); | |
1a60d4c5 | 450 | mutex_unlock(&rmidi->open_mutex); |
1da177e4 | 451 | schedule(); |
1a60d4c5 | 452 | mutex_lock(&rmidi->open_mutex); |
1da177e4 LT |
453 | if (signal_pending(current)) { |
454 | err = -ERESTARTSYS; | |
455 | break; | |
456 | } | |
457 | } | |
458 | #ifdef CONFIG_SND_OSSEMUL | |
459 | if (rawmidi_file->input && rawmidi_file->input->runtime) | |
460 | rawmidi_file->input->runtime->oss = (maj == SOUND_MAJOR); | |
461 | if (rawmidi_file->output && rawmidi_file->output->runtime) | |
462 | rawmidi_file->output->runtime->oss = (maj == SOUND_MAJOR); | |
463 | #endif | |
464 | remove_wait_queue(&rmidi->open_wait, &wait); | |
465 | if (err >= 0) { | |
466 | file->private_data = rawmidi_file; | |
467 | } else { | |
468 | snd_card_file_remove(card, file); | |
469 | kfree(rawmidi_file); | |
470 | } | |
1a60d4c5 | 471 | mutex_unlock(&rmidi->open_mutex); |
1da177e4 LT |
472 | return err; |
473 | } | |
474 | ||
48c9d417 | 475 | int snd_rawmidi_kernel_release(struct snd_rawmidi_file * rfile) |
1da177e4 | 476 | { |
48c9d417 TI |
477 | struct snd_rawmidi *rmidi; |
478 | struct snd_rawmidi_substream *substream; | |
479 | struct snd_rawmidi_runtime *runtime; | |
1da177e4 LT |
480 | |
481 | snd_assert(rfile != NULL, return -ENXIO); | |
482 | snd_assert(rfile->input != NULL || rfile->output != NULL, return -ENXIO); | |
483 | rmidi = rfile->rmidi; | |
1a60d4c5 | 484 | mutex_lock(&rmidi->open_mutex); |
1da177e4 LT |
485 | if (rfile->input != NULL) { |
486 | substream = rfile->input; | |
487 | rfile->input = NULL; | |
488 | runtime = substream->runtime; | |
489 | snd_rawmidi_input_trigger(substream, 0); | |
490 | substream->ops->close(substream); | |
491 | if (runtime->private_free != NULL) | |
492 | runtime->private_free(substream); | |
493 | snd_rawmidi_runtime_free(substream); | |
494 | substream->opened = 0; | |
495 | rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substream_opened--; | |
496 | } | |
497 | if (rfile->output != NULL) { | |
498 | substream = rfile->output; | |
499 | rfile->output = NULL; | |
500 | if (--substream->use_count == 0) { | |
501 | runtime = substream->runtime; | |
502 | if (substream->active_sensing) { | |
503 | unsigned char buf = 0xfe; | |
504 | /* sending single active sensing message to shut the device up */ | |
505 | snd_rawmidi_kernel_write(substream, &buf, 1); | |
506 | } | |
507 | if (snd_rawmidi_drain_output(substream) == -ERESTARTSYS) | |
508 | snd_rawmidi_output_trigger(substream, 0); | |
509 | substream->ops->close(substream); | |
510 | if (runtime->private_free != NULL) | |
511 | runtime->private_free(substream); | |
512 | snd_rawmidi_runtime_free(substream); | |
513 | substream->opened = 0; | |
514 | substream->append = 0; | |
515 | } | |
516 | rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substream_opened--; | |
517 | } | |
1a60d4c5 | 518 | mutex_unlock(&rmidi->open_mutex); |
1da177e4 LT |
519 | module_put(rmidi->card->module); |
520 | return 0; | |
521 | } | |
522 | ||
523 | static int snd_rawmidi_release(struct inode *inode, struct file *file) | |
524 | { | |
48c9d417 TI |
525 | struct snd_rawmidi_file *rfile; |
526 | struct snd_rawmidi *rmidi; | |
1da177e4 LT |
527 | int err; |
528 | ||
529 | rfile = file->private_data; | |
530 | err = snd_rawmidi_kernel_release(rfile); | |
531 | rmidi = rfile->rmidi; | |
532 | wake_up(&rmidi->open_wait); | |
533 | kfree(rfile); | |
534 | snd_card_file_remove(rmidi->card, file); | |
535 | return err; | |
536 | } | |
537 | ||
18612048 AB |
538 | static int snd_rawmidi_info(struct snd_rawmidi_substream *substream, |
539 | struct snd_rawmidi_info *info) | |
1da177e4 | 540 | { |
48c9d417 | 541 | struct snd_rawmidi *rmidi; |
1da177e4 LT |
542 | |
543 | if (substream == NULL) | |
544 | return -ENODEV; | |
545 | rmidi = substream->rmidi; | |
546 | memset(info, 0, sizeof(*info)); | |
547 | info->card = rmidi->card->number; | |
548 | info->device = rmidi->device; | |
549 | info->subdevice = substream->number; | |
550 | info->stream = substream->stream; | |
551 | info->flags = rmidi->info_flags; | |
552 | strcpy(info->id, rmidi->id); | |
553 | strcpy(info->name, rmidi->name); | |
554 | strcpy(info->subname, substream->name); | |
555 | info->subdevices_count = substream->pstr->substream_count; | |
556 | info->subdevices_avail = (substream->pstr->substream_count - | |
557 | substream->pstr->substream_opened); | |
558 | return 0; | |
559 | } | |
560 | ||
48c9d417 TI |
561 | static int snd_rawmidi_info_user(struct snd_rawmidi_substream *substream, |
562 | struct snd_rawmidi_info __user * _info) | |
1da177e4 | 563 | { |
48c9d417 | 564 | struct snd_rawmidi_info info; |
1da177e4 LT |
565 | int err; |
566 | if ((err = snd_rawmidi_info(substream, &info)) < 0) | |
567 | return err; | |
48c9d417 | 568 | if (copy_to_user(_info, &info, sizeof(struct snd_rawmidi_info))) |
1da177e4 LT |
569 | return -EFAULT; |
570 | return 0; | |
571 | } | |
572 | ||
48c9d417 | 573 | int snd_rawmidi_info_select(struct snd_card *card, struct snd_rawmidi_info *info) |
1da177e4 | 574 | { |
48c9d417 TI |
575 | struct snd_rawmidi *rmidi; |
576 | struct snd_rawmidi_str *pstr; | |
577 | struct snd_rawmidi_substream *substream; | |
1da177e4 | 578 | struct list_head *list; |
f87135f5 | 579 | |
1a60d4c5 | 580 | mutex_lock(®ister_mutex); |
f87135f5 | 581 | rmidi = snd_rawmidi_search(card, info->device); |
1a60d4c5 | 582 | mutex_unlock(®ister_mutex); |
a106cd3d CL |
583 | if (!rmidi) |
584 | return -ENXIO; | |
1da177e4 LT |
585 | if (info->stream < 0 || info->stream > 1) |
586 | return -EINVAL; | |
587 | pstr = &rmidi->streams[info->stream]; | |
588 | if (pstr->substream_count == 0) | |
589 | return -ENOENT; | |
590 | if (info->subdevice >= pstr->substream_count) | |
591 | return -ENXIO; | |
592 | list_for_each(list, &pstr->substreams) { | |
48c9d417 | 593 | substream = list_entry(list, struct snd_rawmidi_substream, list); |
1da177e4 LT |
594 | if ((unsigned int)substream->number == info->subdevice) |
595 | return snd_rawmidi_info(substream, info); | |
596 | } | |
597 | return -ENXIO; | |
598 | } | |
599 | ||
48c9d417 TI |
600 | static int snd_rawmidi_info_select_user(struct snd_card *card, |
601 | struct snd_rawmidi_info __user *_info) | |
1da177e4 LT |
602 | { |
603 | int err; | |
48c9d417 | 604 | struct snd_rawmidi_info info; |
1da177e4 LT |
605 | if (get_user(info.device, &_info->device)) |
606 | return -EFAULT; | |
607 | if (get_user(info.stream, &_info->stream)) | |
608 | return -EFAULT; | |
609 | if (get_user(info.subdevice, &_info->subdevice)) | |
610 | return -EFAULT; | |
611 | if ((err = snd_rawmidi_info_select(card, &info)) < 0) | |
612 | return err; | |
48c9d417 | 613 | if (copy_to_user(_info, &info, sizeof(struct snd_rawmidi_info))) |
1da177e4 LT |
614 | return -EFAULT; |
615 | return 0; | |
616 | } | |
617 | ||
48c9d417 TI |
618 | int snd_rawmidi_output_params(struct snd_rawmidi_substream *substream, |
619 | struct snd_rawmidi_params * params) | |
1da177e4 LT |
620 | { |
621 | char *newbuf; | |
48c9d417 | 622 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
1da177e4 LT |
623 | |
624 | if (substream->append && substream->use_count > 1) | |
625 | return -EBUSY; | |
626 | snd_rawmidi_drain_output(substream); | |
627 | if (params->buffer_size < 32 || params->buffer_size > 1024L * 1024L) { | |
628 | return -EINVAL; | |
629 | } | |
630 | if (params->avail_min < 1 || params->avail_min > params->buffer_size) { | |
631 | return -EINVAL; | |
632 | } | |
633 | if (params->buffer_size != runtime->buffer_size) { | |
4fa95ef6 JJ |
634 | newbuf = kmalloc(params->buffer_size, GFP_KERNEL); |
635 | if (!newbuf) | |
1da177e4 LT |
636 | return -ENOMEM; |
637 | kfree(runtime->buffer); | |
638 | runtime->buffer = newbuf; | |
639 | runtime->buffer_size = params->buffer_size; | |
1b98ea47 | 640 | runtime->avail = runtime->buffer_size; |
1da177e4 LT |
641 | } |
642 | runtime->avail_min = params->avail_min; | |
643 | substream->active_sensing = !params->no_active_sensing; | |
644 | return 0; | |
645 | } | |
646 | ||
48c9d417 TI |
647 | int snd_rawmidi_input_params(struct snd_rawmidi_substream *substream, |
648 | struct snd_rawmidi_params * params) | |
1da177e4 LT |
649 | { |
650 | char *newbuf; | |
48c9d417 | 651 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
1da177e4 LT |
652 | |
653 | snd_rawmidi_drain_input(substream); | |
654 | if (params->buffer_size < 32 || params->buffer_size > 1024L * 1024L) { | |
655 | return -EINVAL; | |
656 | } | |
657 | if (params->avail_min < 1 || params->avail_min > params->buffer_size) { | |
658 | return -EINVAL; | |
659 | } | |
660 | if (params->buffer_size != runtime->buffer_size) { | |
4fa95ef6 JJ |
661 | newbuf = kmalloc(params->buffer_size, GFP_KERNEL); |
662 | if (!newbuf) | |
1da177e4 LT |
663 | return -ENOMEM; |
664 | kfree(runtime->buffer); | |
665 | runtime->buffer = newbuf; | |
666 | runtime->buffer_size = params->buffer_size; | |
667 | } | |
668 | runtime->avail_min = params->avail_min; | |
669 | return 0; | |
670 | } | |
671 | ||
48c9d417 TI |
672 | static int snd_rawmidi_output_status(struct snd_rawmidi_substream *substream, |
673 | struct snd_rawmidi_status * status) | |
1da177e4 | 674 | { |
48c9d417 | 675 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
1da177e4 LT |
676 | |
677 | memset(status, 0, sizeof(*status)); | |
678 | status->stream = SNDRV_RAWMIDI_STREAM_OUTPUT; | |
679 | spin_lock_irq(&runtime->lock); | |
680 | status->avail = runtime->avail; | |
681 | spin_unlock_irq(&runtime->lock); | |
682 | return 0; | |
683 | } | |
684 | ||
48c9d417 TI |
685 | static int snd_rawmidi_input_status(struct snd_rawmidi_substream *substream, |
686 | struct snd_rawmidi_status * status) | |
1da177e4 | 687 | { |
48c9d417 | 688 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
1da177e4 LT |
689 | |
690 | memset(status, 0, sizeof(*status)); | |
691 | status->stream = SNDRV_RAWMIDI_STREAM_INPUT; | |
692 | spin_lock_irq(&runtime->lock); | |
693 | status->avail = runtime->avail; | |
694 | status->xruns = runtime->xruns; | |
695 | runtime->xruns = 0; | |
696 | spin_unlock_irq(&runtime->lock); | |
697 | return 0; | |
698 | } | |
699 | ||
700 | static long snd_rawmidi_ioctl(struct file *file, unsigned int cmd, unsigned long arg) | |
701 | { | |
48c9d417 | 702 | struct snd_rawmidi_file *rfile; |
1da177e4 LT |
703 | void __user *argp = (void __user *)arg; |
704 | ||
705 | rfile = file->private_data; | |
706 | if (((cmd >> 8) & 0xff) != 'W') | |
707 | return -ENOTTY; | |
708 | switch (cmd) { | |
709 | case SNDRV_RAWMIDI_IOCTL_PVERSION: | |
710 | return put_user(SNDRV_RAWMIDI_VERSION, (int __user *)argp) ? -EFAULT : 0; | |
711 | case SNDRV_RAWMIDI_IOCTL_INFO: | |
712 | { | |
48c9d417 TI |
713 | int stream; |
714 | struct snd_rawmidi_info __user *info = argp; | |
1da177e4 LT |
715 | if (get_user(stream, &info->stream)) |
716 | return -EFAULT; | |
717 | switch (stream) { | |
718 | case SNDRV_RAWMIDI_STREAM_INPUT: | |
719 | return snd_rawmidi_info_user(rfile->input, info); | |
720 | case SNDRV_RAWMIDI_STREAM_OUTPUT: | |
721 | return snd_rawmidi_info_user(rfile->output, info); | |
722 | default: | |
723 | return -EINVAL; | |
724 | } | |
725 | } | |
726 | case SNDRV_RAWMIDI_IOCTL_PARAMS: | |
727 | { | |
48c9d417 TI |
728 | struct snd_rawmidi_params params; |
729 | if (copy_from_user(¶ms, argp, sizeof(struct snd_rawmidi_params))) | |
1da177e4 LT |
730 | return -EFAULT; |
731 | switch (params.stream) { | |
732 | case SNDRV_RAWMIDI_STREAM_OUTPUT: | |
733 | if (rfile->output == NULL) | |
734 | return -EINVAL; | |
735 | return snd_rawmidi_output_params(rfile->output, ¶ms); | |
736 | case SNDRV_RAWMIDI_STREAM_INPUT: | |
737 | if (rfile->input == NULL) | |
738 | return -EINVAL; | |
739 | return snd_rawmidi_input_params(rfile->input, ¶ms); | |
740 | default: | |
741 | return -EINVAL; | |
742 | } | |
743 | } | |
744 | case SNDRV_RAWMIDI_IOCTL_STATUS: | |
745 | { | |
746 | int err = 0; | |
48c9d417 TI |
747 | struct snd_rawmidi_status status; |
748 | if (copy_from_user(&status, argp, sizeof(struct snd_rawmidi_status))) | |
1da177e4 LT |
749 | return -EFAULT; |
750 | switch (status.stream) { | |
751 | case SNDRV_RAWMIDI_STREAM_OUTPUT: | |
752 | if (rfile->output == NULL) | |
753 | return -EINVAL; | |
754 | err = snd_rawmidi_output_status(rfile->output, &status); | |
755 | break; | |
756 | case SNDRV_RAWMIDI_STREAM_INPUT: | |
757 | if (rfile->input == NULL) | |
758 | return -EINVAL; | |
759 | err = snd_rawmidi_input_status(rfile->input, &status); | |
760 | break; | |
761 | default: | |
762 | return -EINVAL; | |
763 | } | |
764 | if (err < 0) | |
765 | return err; | |
48c9d417 | 766 | if (copy_to_user(argp, &status, sizeof(struct snd_rawmidi_status))) |
1da177e4 LT |
767 | return -EFAULT; |
768 | return 0; | |
769 | } | |
770 | case SNDRV_RAWMIDI_IOCTL_DROP: | |
771 | { | |
772 | int val; | |
773 | if (get_user(val, (int __user *) argp)) | |
774 | return -EFAULT; | |
775 | switch (val) { | |
776 | case SNDRV_RAWMIDI_STREAM_OUTPUT: | |
777 | if (rfile->output == NULL) | |
778 | return -EINVAL; | |
779 | return snd_rawmidi_drop_output(rfile->output); | |
780 | default: | |
781 | return -EINVAL; | |
782 | } | |
783 | } | |
784 | case SNDRV_RAWMIDI_IOCTL_DRAIN: | |
785 | { | |
786 | int val; | |
787 | if (get_user(val, (int __user *) argp)) | |
788 | return -EFAULT; | |
789 | switch (val) { | |
790 | case SNDRV_RAWMIDI_STREAM_OUTPUT: | |
791 | if (rfile->output == NULL) | |
792 | return -EINVAL; | |
793 | return snd_rawmidi_drain_output(rfile->output); | |
794 | case SNDRV_RAWMIDI_STREAM_INPUT: | |
795 | if (rfile->input == NULL) | |
796 | return -EINVAL; | |
797 | return snd_rawmidi_drain_input(rfile->input); | |
798 | default: | |
799 | return -EINVAL; | |
800 | } | |
801 | } | |
802 | #ifdef CONFIG_SND_DEBUG | |
803 | default: | |
804 | snd_printk(KERN_WARNING "rawmidi: unknown command = 0x%x\n", cmd); | |
805 | #endif | |
806 | } | |
807 | return -ENOTTY; | |
808 | } | |
809 | ||
48c9d417 TI |
810 | static int snd_rawmidi_control_ioctl(struct snd_card *card, |
811 | struct snd_ctl_file *control, | |
1da177e4 LT |
812 | unsigned int cmd, |
813 | unsigned long arg) | |
814 | { | |
815 | void __user *argp = (void __user *)arg; | |
1da177e4 | 816 | |
1da177e4 LT |
817 | switch (cmd) { |
818 | case SNDRV_CTL_IOCTL_RAWMIDI_NEXT_DEVICE: | |
819 | { | |
820 | int device; | |
821 | ||
822 | if (get_user(device, (int __user *)argp)) | |
823 | return -EFAULT; | |
1a60d4c5 | 824 | mutex_lock(®ister_mutex); |
1da177e4 LT |
825 | device = device < 0 ? 0 : device + 1; |
826 | while (device < SNDRV_RAWMIDI_DEVICES) { | |
f87135f5 | 827 | if (snd_rawmidi_search(card, device)) |
1da177e4 LT |
828 | break; |
829 | device++; | |
830 | } | |
831 | if (device == SNDRV_RAWMIDI_DEVICES) | |
832 | device = -1; | |
1a60d4c5 | 833 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
834 | if (put_user(device, (int __user *)argp)) |
835 | return -EFAULT; | |
836 | return 0; | |
837 | } | |
838 | case SNDRV_CTL_IOCTL_RAWMIDI_PREFER_SUBDEVICE: | |
839 | { | |
840 | int val; | |
841 | ||
842 | if (get_user(val, (int __user *)argp)) | |
843 | return -EFAULT; | |
844 | control->prefer_rawmidi_subdevice = val; | |
845 | return 0; | |
846 | } | |
847 | case SNDRV_CTL_IOCTL_RAWMIDI_INFO: | |
848 | return snd_rawmidi_info_select_user(card, argp); | |
849 | } | |
850 | return -ENOIOCTLCMD; | |
851 | } | |
852 | ||
853 | /** | |
854 | * snd_rawmidi_receive - receive the input data from the device | |
855 | * @substream: the rawmidi substream | |
856 | * @buffer: the buffer pointer | |
857 | * @count: the data size to read | |
858 | * | |
859 | * Reads the data from the internal buffer. | |
860 | * | |
861 | * Returns the size of read data, or a negative error code on failure. | |
862 | */ | |
48c9d417 TI |
863 | int snd_rawmidi_receive(struct snd_rawmidi_substream *substream, |
864 | const unsigned char *buffer, int count) | |
1da177e4 LT |
865 | { |
866 | unsigned long flags; | |
867 | int result = 0, count1; | |
48c9d417 | 868 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
1da177e4 LT |
869 | |
870 | if (runtime->buffer == NULL) { | |
871 | snd_printd("snd_rawmidi_receive: input is not active!!!\n"); | |
872 | return -EINVAL; | |
873 | } | |
874 | spin_lock_irqsave(&runtime->lock, flags); | |
875 | if (count == 1) { /* special case, faster code */ | |
876 | substream->bytes++; | |
877 | if (runtime->avail < runtime->buffer_size) { | |
878 | runtime->buffer[runtime->hw_ptr++] = buffer[0]; | |
879 | runtime->hw_ptr %= runtime->buffer_size; | |
880 | runtime->avail++; | |
881 | result++; | |
882 | } else { | |
883 | runtime->xruns++; | |
884 | } | |
885 | } else { | |
886 | substream->bytes += count; | |
887 | count1 = runtime->buffer_size - runtime->hw_ptr; | |
888 | if (count1 > count) | |
889 | count1 = count; | |
890 | if (count1 > (int)(runtime->buffer_size - runtime->avail)) | |
891 | count1 = runtime->buffer_size - runtime->avail; | |
892 | memcpy(runtime->buffer + runtime->hw_ptr, buffer, count1); | |
893 | runtime->hw_ptr += count1; | |
894 | runtime->hw_ptr %= runtime->buffer_size; | |
895 | runtime->avail += count1; | |
896 | count -= count1; | |
897 | result += count1; | |
898 | if (count > 0) { | |
899 | buffer += count1; | |
900 | count1 = count; | |
901 | if (count1 > (int)(runtime->buffer_size - runtime->avail)) { | |
902 | count1 = runtime->buffer_size - runtime->avail; | |
903 | runtime->xruns += count - count1; | |
904 | } | |
905 | if (count1 > 0) { | |
906 | memcpy(runtime->buffer, buffer, count1); | |
907 | runtime->hw_ptr = count1; | |
908 | runtime->avail += count1; | |
909 | result += count1; | |
910 | } | |
911 | } | |
912 | } | |
913 | if (result > 0) { | |
914 | if (runtime->event) | |
915 | tasklet_hi_schedule(&runtime->tasklet); | |
916 | else if (snd_rawmidi_ready(substream)) | |
917 | wake_up(&runtime->sleep); | |
918 | } | |
919 | spin_unlock_irqrestore(&runtime->lock, flags); | |
920 | return result; | |
921 | } | |
922 | ||
48c9d417 | 923 | static long snd_rawmidi_kernel_read1(struct snd_rawmidi_substream *substream, |
1da177e4 LT |
924 | unsigned char *buf, long count, int kernel) |
925 | { | |
926 | unsigned long flags; | |
927 | long result = 0, count1; | |
48c9d417 | 928 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
1da177e4 LT |
929 | |
930 | while (count > 0 && runtime->avail) { | |
931 | count1 = runtime->buffer_size - runtime->appl_ptr; | |
932 | if (count1 > count) | |
933 | count1 = count; | |
934 | spin_lock_irqsave(&runtime->lock, flags); | |
935 | if (count1 > (int)runtime->avail) | |
936 | count1 = runtime->avail; | |
937 | if (kernel) { | |
938 | memcpy(buf + result, runtime->buffer + runtime->appl_ptr, count1); | |
939 | } else { | |
940 | spin_unlock_irqrestore(&runtime->lock, flags); | |
941 | if (copy_to_user((char __user *)buf + result, | |
942 | runtime->buffer + runtime->appl_ptr, count1)) { | |
943 | return result > 0 ? result : -EFAULT; | |
944 | } | |
945 | spin_lock_irqsave(&runtime->lock, flags); | |
946 | } | |
947 | runtime->appl_ptr += count1; | |
948 | runtime->appl_ptr %= runtime->buffer_size; | |
949 | runtime->avail -= count1; | |
950 | spin_unlock_irqrestore(&runtime->lock, flags); | |
951 | result += count1; | |
952 | count -= count1; | |
953 | } | |
954 | return result; | |
955 | } | |
956 | ||
48c9d417 TI |
957 | long snd_rawmidi_kernel_read(struct snd_rawmidi_substream *substream, |
958 | unsigned char *buf, long count) | |
1da177e4 LT |
959 | { |
960 | snd_rawmidi_input_trigger(substream, 1); | |
961 | return snd_rawmidi_kernel_read1(substream, buf, count, 1); | |
962 | } | |
963 | ||
48c9d417 TI |
964 | static ssize_t snd_rawmidi_read(struct file *file, char __user *buf, size_t count, |
965 | loff_t *offset) | |
1da177e4 LT |
966 | { |
967 | long result; | |
968 | int count1; | |
48c9d417 TI |
969 | struct snd_rawmidi_file *rfile; |
970 | struct snd_rawmidi_substream *substream; | |
971 | struct snd_rawmidi_runtime *runtime; | |
1da177e4 LT |
972 | |
973 | rfile = file->private_data; | |
974 | substream = rfile->input; | |
975 | if (substream == NULL) | |
976 | return -EIO; | |
977 | runtime = substream->runtime; | |
978 | snd_rawmidi_input_trigger(substream, 1); | |
979 | result = 0; | |
980 | while (count > 0) { | |
981 | spin_lock_irq(&runtime->lock); | |
982 | while (!snd_rawmidi_ready(substream)) { | |
983 | wait_queue_t wait; | |
984 | if ((file->f_flags & O_NONBLOCK) != 0 || result > 0) { | |
985 | spin_unlock_irq(&runtime->lock); | |
986 | return result > 0 ? result : -EAGAIN; | |
987 | } | |
988 | init_waitqueue_entry(&wait, current); | |
989 | add_wait_queue(&runtime->sleep, &wait); | |
990 | set_current_state(TASK_INTERRUPTIBLE); | |
991 | spin_unlock_irq(&runtime->lock); | |
992 | schedule(); | |
993 | remove_wait_queue(&runtime->sleep, &wait); | |
994 | if (signal_pending(current)) | |
995 | return result > 0 ? result : -ERESTARTSYS; | |
996 | if (!runtime->avail) | |
997 | return result > 0 ? result : -EIO; | |
998 | spin_lock_irq(&runtime->lock); | |
999 | } | |
1000 | spin_unlock_irq(&runtime->lock); | |
4d23359b CL |
1001 | count1 = snd_rawmidi_kernel_read1(substream, |
1002 | (unsigned char __force *)buf, | |
1003 | count, 0); | |
1da177e4 LT |
1004 | if (count1 < 0) |
1005 | return result > 0 ? result : count1; | |
1006 | result += count1; | |
1007 | buf += count1; | |
1008 | count -= count1; | |
1009 | } | |
1010 | return result; | |
1011 | } | |
1012 | ||
1013 | /** | |
1014 | * snd_rawmidi_transmit_empty - check whether the output buffer is empty | |
1015 | * @substream: the rawmidi substream | |
1016 | * | |
1017 | * Returns 1 if the internal output buffer is empty, 0 if not. | |
1018 | */ | |
48c9d417 | 1019 | int snd_rawmidi_transmit_empty(struct snd_rawmidi_substream *substream) |
1da177e4 | 1020 | { |
48c9d417 | 1021 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
1da177e4 LT |
1022 | int result; |
1023 | unsigned long flags; | |
1024 | ||
1025 | if (runtime->buffer == NULL) { | |
1026 | snd_printd("snd_rawmidi_transmit_empty: output is not active!!!\n"); | |
1027 | return 1; | |
1028 | } | |
1029 | spin_lock_irqsave(&runtime->lock, flags); | |
1030 | result = runtime->avail >= runtime->buffer_size; | |
1031 | spin_unlock_irqrestore(&runtime->lock, flags); | |
1032 | return result; | |
1033 | } | |
1034 | ||
1035 | /** | |
1036 | * snd_rawmidi_transmit_peek - copy data from the internal buffer | |
1037 | * @substream: the rawmidi substream | |
1038 | * @buffer: the buffer pointer | |
1039 | * @count: data size to transfer | |
1040 | * | |
1041 | * Copies data from the internal output buffer to the given buffer. | |
1042 | * | |
1043 | * Call this in the interrupt handler when the midi output is ready, | |
1044 | * and call snd_rawmidi_transmit_ack() after the transmission is | |
1045 | * finished. | |
1046 | * | |
1047 | * Returns the size of copied data, or a negative error code on failure. | |
1048 | */ | |
48c9d417 TI |
1049 | int snd_rawmidi_transmit_peek(struct snd_rawmidi_substream *substream, |
1050 | unsigned char *buffer, int count) | |
1da177e4 LT |
1051 | { |
1052 | unsigned long flags; | |
1053 | int result, count1; | |
48c9d417 | 1054 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
1da177e4 LT |
1055 | |
1056 | if (runtime->buffer == NULL) { | |
1057 | snd_printd("snd_rawmidi_transmit_peek: output is not active!!!\n"); | |
1058 | return -EINVAL; | |
1059 | } | |
1060 | result = 0; | |
1061 | spin_lock_irqsave(&runtime->lock, flags); | |
1062 | if (runtime->avail >= runtime->buffer_size) { | |
1063 | /* warning: lowlevel layer MUST trigger down the hardware */ | |
1064 | goto __skip; | |
1065 | } | |
1066 | if (count == 1) { /* special case, faster code */ | |
1067 | *buffer = runtime->buffer[runtime->hw_ptr]; | |
1068 | result++; | |
1069 | } else { | |
1070 | count1 = runtime->buffer_size - runtime->hw_ptr; | |
1071 | if (count1 > count) | |
1072 | count1 = count; | |
1073 | if (count1 > (int)(runtime->buffer_size - runtime->avail)) | |
1074 | count1 = runtime->buffer_size - runtime->avail; | |
1075 | memcpy(buffer, runtime->buffer + runtime->hw_ptr, count1); | |
1076 | count -= count1; | |
1077 | result += count1; | |
1078 | if (count > 0) { | |
1079 | if (count > (int)(runtime->buffer_size - runtime->avail - count1)) | |
1080 | count = runtime->buffer_size - runtime->avail - count1; | |
1081 | memcpy(buffer + count1, runtime->buffer, count); | |
1082 | result += count; | |
1083 | } | |
1084 | } | |
1085 | __skip: | |
1086 | spin_unlock_irqrestore(&runtime->lock, flags); | |
1087 | return result; | |
1088 | } | |
1089 | ||
1090 | /** | |
1091 | * snd_rawmidi_transmit_ack - acknowledge the transmission | |
1092 | * @substream: the rawmidi substream | |
1093 | * @count: the tranferred count | |
1094 | * | |
1095 | * Advances the hardware pointer for the internal output buffer with | |
1096 | * the given size and updates the condition. | |
1097 | * Call after the transmission is finished. | |
1098 | * | |
1099 | * Returns the advanced size if successful, or a negative error code on failure. | |
1100 | */ | |
48c9d417 | 1101 | int snd_rawmidi_transmit_ack(struct snd_rawmidi_substream *substream, int count) |
1da177e4 LT |
1102 | { |
1103 | unsigned long flags; | |
48c9d417 | 1104 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
1da177e4 LT |
1105 | |
1106 | if (runtime->buffer == NULL) { | |
1107 | snd_printd("snd_rawmidi_transmit_ack: output is not active!!!\n"); | |
1108 | return -EINVAL; | |
1109 | } | |
1110 | spin_lock_irqsave(&runtime->lock, flags); | |
1111 | snd_assert(runtime->avail + count <= runtime->buffer_size, ); | |
1112 | runtime->hw_ptr += count; | |
1113 | runtime->hw_ptr %= runtime->buffer_size; | |
1114 | runtime->avail += count; | |
1115 | substream->bytes += count; | |
1116 | if (count > 0) { | |
1117 | if (runtime->drain || snd_rawmidi_ready(substream)) | |
1118 | wake_up(&runtime->sleep); | |
1119 | } | |
1120 | spin_unlock_irqrestore(&runtime->lock, flags); | |
1121 | return count; | |
1122 | } | |
1123 | ||
1124 | /** | |
1125 | * snd_rawmidi_transmit - copy from the buffer to the device | |
1126 | * @substream: the rawmidi substream | |
df8db936 | 1127 | * @buffer: the buffer pointer |
1da177e4 LT |
1128 | * @count: the data size to transfer |
1129 | * | |
1130 | * Copies data from the buffer to the device and advances the pointer. | |
1131 | * | |
1132 | * Returns the copied size if successful, or a negative error code on failure. | |
1133 | */ | |
48c9d417 TI |
1134 | int snd_rawmidi_transmit(struct snd_rawmidi_substream *substream, |
1135 | unsigned char *buffer, int count) | |
1da177e4 LT |
1136 | { |
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 TI |
1143 | static long snd_rawmidi_kernel_write1(struct snd_rawmidi_substream *substream, |
1144 | const unsigned char *buf, long count, int kernel) | |
1da177e4 LT |
1145 | { |
1146 | unsigned long flags; | |
1147 | long count1, result; | |
48c9d417 | 1148 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
1da177e4 LT |
1149 | |
1150 | snd_assert(buf != NULL, return -EINVAL); | |
1151 | snd_assert(runtime->buffer != NULL, return -EINVAL); | |
1152 | ||
1153 | result = 0; | |
1154 | spin_lock_irqsave(&runtime->lock, flags); | |
1155 | if (substream->append) { | |
1156 | if ((long)runtime->avail < count) { | |
1157 | spin_unlock_irqrestore(&runtime->lock, flags); | |
1158 | return -EAGAIN; | |
1159 | } | |
1160 | } | |
1161 | while (count > 0 && runtime->avail > 0) { | |
1162 | count1 = runtime->buffer_size - runtime->appl_ptr; | |
1163 | if (count1 > count) | |
1164 | count1 = count; | |
1165 | if (count1 > (long)runtime->avail) | |
1166 | count1 = runtime->avail; | |
1167 | if (kernel) { | |
1168 | memcpy(runtime->buffer + runtime->appl_ptr, buf, count1); | |
1169 | } else { | |
1170 | spin_unlock_irqrestore(&runtime->lock, flags); | |
1171 | if (copy_from_user(runtime->buffer + runtime->appl_ptr, | |
1172 | (char __user *)buf, count1)) { | |
1173 | spin_lock_irqsave(&runtime->lock, flags); | |
1174 | result = result > 0 ? result : -EFAULT; | |
1175 | goto __end; | |
1176 | } | |
1177 | spin_lock_irqsave(&runtime->lock, flags); | |
1178 | } | |
1179 | runtime->appl_ptr += count1; | |
1180 | runtime->appl_ptr %= runtime->buffer_size; | |
1181 | runtime->avail -= count1; | |
1182 | result += count1; | |
1183 | buf += count1; | |
1184 | count -= count1; | |
1185 | } | |
1186 | __end: | |
1187 | count1 = runtime->avail < runtime->buffer_size; | |
1188 | spin_unlock_irqrestore(&runtime->lock, flags); | |
1189 | if (count1) | |
1190 | snd_rawmidi_output_trigger(substream, 1); | |
1191 | return result; | |
1192 | } | |
1193 | ||
48c9d417 TI |
1194 | long snd_rawmidi_kernel_write(struct snd_rawmidi_substream *substream, |
1195 | const unsigned char *buf, long count) | |
1da177e4 LT |
1196 | { |
1197 | return snd_rawmidi_kernel_write1(substream, buf, count, 1); | |
1198 | } | |
1199 | ||
48c9d417 TI |
1200 | static ssize_t snd_rawmidi_write(struct file *file, const char __user *buf, |
1201 | size_t count, loff_t *offset) | |
1da177e4 LT |
1202 | { |
1203 | long result, timeout; | |
1204 | int count1; | |
48c9d417 TI |
1205 | struct snd_rawmidi_file *rfile; |
1206 | struct snd_rawmidi_runtime *runtime; | |
1207 | struct snd_rawmidi_substream *substream; | |
1da177e4 LT |
1208 | |
1209 | rfile = file->private_data; | |
1210 | substream = rfile->output; | |
1211 | runtime = substream->runtime; | |
1212 | /* we cannot put an atomic message to our buffer */ | |
1213 | if (substream->append && count > runtime->buffer_size) | |
1214 | return -EIO; | |
1215 | result = 0; | |
1216 | while (count > 0) { | |
1217 | spin_lock_irq(&runtime->lock); | |
1218 | while (!snd_rawmidi_ready_append(substream, count)) { | |
1219 | wait_queue_t wait; | |
1220 | if (file->f_flags & O_NONBLOCK) { | |
1221 | spin_unlock_irq(&runtime->lock); | |
1222 | return result > 0 ? result : -EAGAIN; | |
1223 | } | |
1224 | init_waitqueue_entry(&wait, current); | |
1225 | add_wait_queue(&runtime->sleep, &wait); | |
1226 | set_current_state(TASK_INTERRUPTIBLE); | |
1227 | spin_unlock_irq(&runtime->lock); | |
1228 | timeout = schedule_timeout(30 * HZ); | |
1229 | remove_wait_queue(&runtime->sleep, &wait); | |
1230 | if (signal_pending(current)) | |
1231 | return result > 0 ? result : -ERESTARTSYS; | |
1232 | if (!runtime->avail && !timeout) | |
1233 | return result > 0 ? result : -EIO; | |
1234 | spin_lock_irq(&runtime->lock); | |
1235 | } | |
1236 | spin_unlock_irq(&runtime->lock); | |
4d23359b CL |
1237 | count1 = snd_rawmidi_kernel_write1(substream, |
1238 | (unsigned char __force *)buf, | |
1239 | count, 0); | |
1da177e4 LT |
1240 | if (count1 < 0) |
1241 | return result > 0 ? result : count1; | |
1242 | result += count1; | |
1243 | buf += count1; | |
1244 | if ((size_t)count1 < count && (file->f_flags & O_NONBLOCK)) | |
1245 | break; | |
1246 | count -= count1; | |
1247 | } | |
1248 | if (file->f_flags & O_SYNC) { | |
1249 | spin_lock_irq(&runtime->lock); | |
1250 | while (runtime->avail != runtime->buffer_size) { | |
1251 | wait_queue_t wait; | |
1252 | unsigned int last_avail = runtime->avail; | |
1253 | init_waitqueue_entry(&wait, current); | |
1254 | add_wait_queue(&runtime->sleep, &wait); | |
1255 | set_current_state(TASK_INTERRUPTIBLE); | |
1256 | spin_unlock_irq(&runtime->lock); | |
1257 | timeout = schedule_timeout(30 * HZ); | |
1258 | remove_wait_queue(&runtime->sleep, &wait); | |
1259 | if (signal_pending(current)) | |
1260 | return result > 0 ? result : -ERESTARTSYS; | |
1261 | if (runtime->avail == last_avail && !timeout) | |
1262 | return result > 0 ? result : -EIO; | |
1263 | spin_lock_irq(&runtime->lock); | |
1264 | } | |
1265 | spin_unlock_irq(&runtime->lock); | |
1266 | } | |
1267 | return result; | |
1268 | } | |
1269 | ||
1270 | static unsigned int snd_rawmidi_poll(struct file *file, poll_table * wait) | |
1271 | { | |
48c9d417 TI |
1272 | struct snd_rawmidi_file *rfile; |
1273 | struct snd_rawmidi_runtime *runtime; | |
1da177e4 LT |
1274 | unsigned int mask; |
1275 | ||
1276 | rfile = file->private_data; | |
1277 | if (rfile->input != NULL) { | |
1278 | runtime = rfile->input->runtime; | |
1279 | snd_rawmidi_input_trigger(rfile->input, 1); | |
1280 | poll_wait(file, &runtime->sleep, wait); | |
1281 | } | |
1282 | if (rfile->output != NULL) { | |
1283 | runtime = rfile->output->runtime; | |
1284 | poll_wait(file, &runtime->sleep, wait); | |
1285 | } | |
1286 | mask = 0; | |
1287 | if (rfile->input != NULL) { | |
1288 | if (snd_rawmidi_ready(rfile->input)) | |
1289 | mask |= POLLIN | POLLRDNORM; | |
1290 | } | |
1291 | if (rfile->output != NULL) { | |
1292 | if (snd_rawmidi_ready(rfile->output)) | |
1293 | mask |= POLLOUT | POLLWRNORM; | |
1294 | } | |
1295 | return mask; | |
1296 | } | |
1297 | ||
1298 | /* | |
1299 | */ | |
1300 | #ifdef CONFIG_COMPAT | |
1301 | #include "rawmidi_compat.c" | |
1302 | #else | |
1303 | #define snd_rawmidi_ioctl_compat NULL | |
1304 | #endif | |
1305 | ||
1306 | /* | |
1307 | ||
1308 | */ | |
1309 | ||
48c9d417 TI |
1310 | static void snd_rawmidi_proc_info_read(struct snd_info_entry *entry, |
1311 | struct snd_info_buffer *buffer) | |
1da177e4 | 1312 | { |
48c9d417 TI |
1313 | struct snd_rawmidi *rmidi; |
1314 | struct snd_rawmidi_substream *substream; | |
1315 | struct snd_rawmidi_runtime *runtime; | |
1da177e4 LT |
1316 | struct list_head *list; |
1317 | ||
1318 | rmidi = entry->private_data; | |
1319 | snd_iprintf(buffer, "%s\n\n", rmidi->name); | |
1a60d4c5 | 1320 | mutex_lock(&rmidi->open_mutex); |
1da177e4 LT |
1321 | if (rmidi->info_flags & SNDRV_RAWMIDI_INFO_OUTPUT) { |
1322 | list_for_each(list, &rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substreams) { | |
48c9d417 | 1323 | substream = list_entry(list, struct snd_rawmidi_substream, list); |
1da177e4 LT |
1324 | snd_iprintf(buffer, |
1325 | "Output %d\n" | |
1326 | " Tx bytes : %lu\n", | |
1327 | substream->number, | |
1328 | (unsigned long) substream->bytes); | |
1329 | if (substream->opened) { | |
1330 | runtime = substream->runtime; | |
1331 | snd_iprintf(buffer, | |
1332 | " Mode : %s\n" | |
1333 | " Buffer size : %lu\n" | |
1334 | " Avail : %lu\n", | |
1335 | runtime->oss ? "OSS compatible" : "native", | |
1336 | (unsigned long) runtime->buffer_size, | |
1337 | (unsigned long) runtime->avail); | |
1338 | } | |
1339 | } | |
1340 | } | |
1341 | if (rmidi->info_flags & SNDRV_RAWMIDI_INFO_INPUT) { | |
1342 | list_for_each(list, &rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substreams) { | |
48c9d417 | 1343 | substream = list_entry(list, struct snd_rawmidi_substream, list); |
1da177e4 LT |
1344 | snd_iprintf(buffer, |
1345 | "Input %d\n" | |
1346 | " Rx bytes : %lu\n", | |
1347 | substream->number, | |
1348 | (unsigned long) substream->bytes); | |
1349 | if (substream->opened) { | |
1350 | runtime = substream->runtime; | |
1351 | snd_iprintf(buffer, | |
1352 | " Buffer size : %lu\n" | |
1353 | " Avail : %lu\n" | |
1354 | " Overruns : %lu\n", | |
1355 | (unsigned long) runtime->buffer_size, | |
1356 | (unsigned long) runtime->avail, | |
1357 | (unsigned long) runtime->xruns); | |
1358 | } | |
1359 | } | |
1360 | } | |
1a60d4c5 | 1361 | mutex_unlock(&rmidi->open_mutex); |
1da177e4 LT |
1362 | } |
1363 | ||
1364 | /* | |
1365 | * Register functions | |
1366 | */ | |
1367 | ||
1368 | static struct file_operations snd_rawmidi_f_ops = | |
1369 | { | |
1370 | .owner = THIS_MODULE, | |
1371 | .read = snd_rawmidi_read, | |
1372 | .write = snd_rawmidi_write, | |
1373 | .open = snd_rawmidi_open, | |
1374 | .release = snd_rawmidi_release, | |
1375 | .poll = snd_rawmidi_poll, | |
1376 | .unlocked_ioctl = snd_rawmidi_ioctl, | |
1377 | .compat_ioctl = snd_rawmidi_ioctl_compat, | |
1378 | }; | |
1379 | ||
48c9d417 TI |
1380 | static int snd_rawmidi_alloc_substreams(struct snd_rawmidi *rmidi, |
1381 | struct snd_rawmidi_str *stream, | |
1da177e4 LT |
1382 | int direction, |
1383 | int count) | |
1384 | { | |
48c9d417 | 1385 | struct snd_rawmidi_substream *substream; |
1da177e4 LT |
1386 | int idx; |
1387 | ||
1da177e4 | 1388 | for (idx = 0; idx < count; idx++) { |
ca2c0966 | 1389 | substream = kzalloc(sizeof(*substream), GFP_KERNEL); |
73e77ba0 TI |
1390 | if (substream == NULL) { |
1391 | snd_printk(KERN_ERR "rawmidi: cannot allocate substream\n"); | |
1da177e4 | 1392 | return -ENOMEM; |
73e77ba0 | 1393 | } |
1da177e4 LT |
1394 | substream->stream = direction; |
1395 | substream->number = idx; | |
1396 | substream->rmidi = rmidi; | |
1397 | substream->pstr = stream; | |
1398 | list_add_tail(&substream->list, &stream->substreams); | |
1399 | stream->substream_count++; | |
1400 | } | |
1401 | return 0; | |
1402 | } | |
1403 | ||
1404 | /** | |
1405 | * snd_rawmidi_new - create a rawmidi instance | |
1406 | * @card: the card instance | |
1407 | * @id: the id string | |
1408 | * @device: the device index | |
1409 | * @output_count: the number of output streams | |
1410 | * @input_count: the number of input streams | |
1411 | * @rrawmidi: the pointer to store the new rawmidi instance | |
1412 | * | |
1413 | * Creates a new rawmidi instance. | |
1414 | * Use snd_rawmidi_set_ops() to set the operators to the new instance. | |
1415 | * | |
1416 | * Returns zero if successful, or a negative error code on failure. | |
1417 | */ | |
48c9d417 | 1418 | int snd_rawmidi_new(struct snd_card *card, char *id, int device, |
1da177e4 | 1419 | int output_count, int input_count, |
48c9d417 | 1420 | struct snd_rawmidi ** rrawmidi) |
1da177e4 | 1421 | { |
48c9d417 | 1422 | struct snd_rawmidi *rmidi; |
1da177e4 | 1423 | int err; |
48c9d417 | 1424 | static struct snd_device_ops ops = { |
1da177e4 LT |
1425 | .dev_free = snd_rawmidi_dev_free, |
1426 | .dev_register = snd_rawmidi_dev_register, | |
1427 | .dev_disconnect = snd_rawmidi_dev_disconnect, | |
1da177e4 LT |
1428 | }; |
1429 | ||
1430 | snd_assert(rrawmidi != NULL, return -EINVAL); | |
1431 | *rrawmidi = NULL; | |
1432 | snd_assert(card != NULL, return -ENXIO); | |
ca2c0966 | 1433 | rmidi = kzalloc(sizeof(*rmidi), GFP_KERNEL); |
73e77ba0 TI |
1434 | if (rmidi == NULL) { |
1435 | snd_printk(KERN_ERR "rawmidi: cannot allocate\n"); | |
1da177e4 | 1436 | return -ENOMEM; |
73e77ba0 | 1437 | } |
1da177e4 LT |
1438 | rmidi->card = card; |
1439 | rmidi->device = device; | |
1a60d4c5 | 1440 | mutex_init(&rmidi->open_mutex); |
1da177e4 | 1441 | init_waitqueue_head(&rmidi->open_wait); |
c13893d7 AM |
1442 | INIT_LIST_HEAD(&rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substreams); |
1443 | INIT_LIST_HEAD(&rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substreams); | |
1444 | ||
1da177e4 LT |
1445 | if (id != NULL) |
1446 | strlcpy(rmidi->id, id, sizeof(rmidi->id)); | |
73e77ba0 TI |
1447 | if ((err = snd_rawmidi_alloc_substreams(rmidi, |
1448 | &rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT], | |
1449 | SNDRV_RAWMIDI_STREAM_INPUT, | |
1450 | input_count)) < 0) { | |
1da177e4 LT |
1451 | snd_rawmidi_free(rmidi); |
1452 | return err; | |
1453 | } | |
73e77ba0 TI |
1454 | if ((err = snd_rawmidi_alloc_substreams(rmidi, |
1455 | &rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT], | |
1456 | SNDRV_RAWMIDI_STREAM_OUTPUT, | |
1457 | output_count)) < 0) { | |
1da177e4 LT |
1458 | snd_rawmidi_free(rmidi); |
1459 | return err; | |
1460 | } | |
1461 | if ((err = snd_device_new(card, SNDRV_DEV_RAWMIDI, rmidi, &ops)) < 0) { | |
1462 | snd_rawmidi_free(rmidi); | |
1463 | return err; | |
1464 | } | |
1465 | *rrawmidi = rmidi; | |
1466 | return 0; | |
1467 | } | |
1468 | ||
48c9d417 | 1469 | static void snd_rawmidi_free_substreams(struct snd_rawmidi_str *stream) |
1da177e4 | 1470 | { |
48c9d417 | 1471 | struct snd_rawmidi_substream *substream; |
1da177e4 LT |
1472 | |
1473 | while (!list_empty(&stream->substreams)) { | |
48c9d417 | 1474 | substream = list_entry(stream->substreams.next, struct snd_rawmidi_substream, list); |
1da177e4 LT |
1475 | list_del(&substream->list); |
1476 | kfree(substream); | |
1477 | } | |
1478 | } | |
1479 | ||
48c9d417 | 1480 | static int snd_rawmidi_free(struct snd_rawmidi *rmidi) |
1da177e4 LT |
1481 | { |
1482 | snd_assert(rmidi != NULL, return -ENXIO); | |
c461482c TI |
1483 | |
1484 | snd_info_free_entry(rmidi->proc_entry); | |
1485 | rmidi->proc_entry = NULL; | |
1486 | mutex_lock(®ister_mutex); | |
1487 | if (rmidi->ops && rmidi->ops->dev_unregister) | |
1488 | rmidi->ops->dev_unregister(rmidi); | |
1489 | mutex_unlock(®ister_mutex); | |
1490 | ||
1da177e4 LT |
1491 | snd_rawmidi_free_substreams(&rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT]); |
1492 | snd_rawmidi_free_substreams(&rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT]); | |
1493 | if (rmidi->private_free) | |
1494 | rmidi->private_free(rmidi); | |
1495 | kfree(rmidi); | |
1496 | return 0; | |
1497 | } | |
1498 | ||
48c9d417 | 1499 | static int snd_rawmidi_dev_free(struct snd_device *device) |
1da177e4 | 1500 | { |
48c9d417 | 1501 | struct snd_rawmidi *rmidi = device->device_data; |
1da177e4 LT |
1502 | return snd_rawmidi_free(rmidi); |
1503 | } | |
1504 | ||
1505 | #if defined(CONFIG_SND_SEQUENCER) || (defined(MODULE) && defined(CONFIG_SND_SEQUENCER_MODULE)) | |
48c9d417 | 1506 | static void snd_rawmidi_dev_seq_free(struct snd_seq_device *device) |
1da177e4 | 1507 | { |
48c9d417 | 1508 | struct snd_rawmidi *rmidi = device->private_data; |
1da177e4 LT |
1509 | rmidi->seq_dev = NULL; |
1510 | } | |
1511 | #endif | |
1512 | ||
48c9d417 | 1513 | static int snd_rawmidi_dev_register(struct snd_device *device) |
1da177e4 | 1514 | { |
f87135f5 | 1515 | int err; |
48c9d417 | 1516 | struct snd_info_entry *entry; |
1da177e4 | 1517 | char name[16]; |
48c9d417 | 1518 | struct snd_rawmidi *rmidi = device->device_data; |
1da177e4 LT |
1519 | |
1520 | if (rmidi->device >= SNDRV_RAWMIDI_DEVICES) | |
1521 | return -ENOMEM; | |
1a60d4c5 | 1522 | mutex_lock(®ister_mutex); |
f87135f5 | 1523 | if (snd_rawmidi_search(rmidi->card, rmidi->device)) { |
1a60d4c5 | 1524 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
1525 | return -EBUSY; |
1526 | } | |
f87135f5 | 1527 | list_add_tail(&rmidi->list, &snd_rawmidi_devices); |
1da177e4 LT |
1528 | sprintf(name, "midiC%iD%i", rmidi->card->number, rmidi->device); |
1529 | if ((err = snd_register_device(SNDRV_DEVICE_TYPE_RAWMIDI, | |
1530 | rmidi->card, rmidi->device, | |
f87135f5 | 1531 | &snd_rawmidi_f_ops, rmidi, name)) < 0) { |
1da177e4 | 1532 | snd_printk(KERN_ERR "unable to register rawmidi device %i:%i\n", rmidi->card->number, rmidi->device); |
f87135f5 | 1533 | list_del(&rmidi->list); |
1a60d4c5 | 1534 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
1535 | return err; |
1536 | } | |
1537 | if (rmidi->ops && rmidi->ops->dev_register && | |
1538 | (err = rmidi->ops->dev_register(rmidi)) < 0) { | |
1539 | snd_unregister_device(SNDRV_DEVICE_TYPE_RAWMIDI, rmidi->card, rmidi->device); | |
f87135f5 | 1540 | list_del(&rmidi->list); |
1a60d4c5 | 1541 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
1542 | return err; |
1543 | } | |
1544 | #ifdef CONFIG_SND_OSSEMUL | |
1545 | rmidi->ossreg = 0; | |
1546 | if ((int)rmidi->device == midi_map[rmidi->card->number]) { | |
1547 | if (snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_MIDI, | |
f87135f5 CL |
1548 | rmidi->card, 0, &snd_rawmidi_f_ops, |
1549 | rmidi, name) < 0) { | |
1da177e4 LT |
1550 | snd_printk(KERN_ERR "unable to register OSS rawmidi device %i:%i\n", rmidi->card->number, 0); |
1551 | } else { | |
1552 | rmidi->ossreg++; | |
1553 | #ifdef SNDRV_OSS_INFO_DEV_MIDI | |
1554 | snd_oss_info_register(SNDRV_OSS_INFO_DEV_MIDI, rmidi->card->number, rmidi->name); | |
1555 | #endif | |
1556 | } | |
1557 | } | |
1558 | if ((int)rmidi->device == amidi_map[rmidi->card->number]) { | |
1559 | if (snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_MIDI, | |
f87135f5 CL |
1560 | rmidi->card, 1, &snd_rawmidi_f_ops, |
1561 | rmidi, name) < 0) { | |
1da177e4 LT |
1562 | snd_printk(KERN_ERR "unable to register OSS rawmidi device %i:%i\n", rmidi->card->number, 1); |
1563 | } else { | |
1564 | rmidi->ossreg++; | |
1565 | } | |
1566 | } | |
1567 | #endif /* CONFIG_SND_OSSEMUL */ | |
1a60d4c5 | 1568 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
1569 | sprintf(name, "midi%d", rmidi->device); |
1570 | entry = snd_info_create_card_entry(rmidi->card, name, rmidi->card->proc_root); | |
1571 | if (entry) { | |
1572 | entry->private_data = rmidi; | |
1da177e4 LT |
1573 | entry->c.text.read = snd_rawmidi_proc_info_read; |
1574 | if (snd_info_register(entry) < 0) { | |
1575 | snd_info_free_entry(entry); | |
1576 | entry = NULL; | |
1577 | } | |
1578 | } | |
1579 | rmidi->proc_entry = entry; | |
1580 | #if defined(CONFIG_SND_SEQUENCER) || (defined(MODULE) && defined(CONFIG_SND_SEQUENCER_MODULE)) | |
1581 | if (!rmidi->ops || !rmidi->ops->dev_register) { /* own registration mechanism */ | |
1582 | if (snd_seq_device_new(rmidi->card, rmidi->device, SNDRV_SEQ_DEV_ID_MIDISYNTH, 0, &rmidi->seq_dev) >= 0) { | |
1583 | rmidi->seq_dev->private_data = rmidi; | |
1584 | rmidi->seq_dev->private_free = snd_rawmidi_dev_seq_free; | |
1585 | sprintf(rmidi->seq_dev->name, "MIDI %d-%d", rmidi->card->number, rmidi->device); | |
1586 | snd_device_register(rmidi->card, rmidi->seq_dev); | |
1587 | } | |
1588 | } | |
1589 | #endif | |
1590 | return 0; | |
1591 | } | |
1592 | ||
48c9d417 | 1593 | static int snd_rawmidi_dev_disconnect(struct snd_device *device) |
1da177e4 | 1594 | { |
48c9d417 | 1595 | struct snd_rawmidi *rmidi = device->device_data; |
1da177e4 | 1596 | |
1a60d4c5 | 1597 | mutex_lock(®ister_mutex); |
f87135f5 | 1598 | list_del_init(&rmidi->list); |
1da177e4 LT |
1599 | #ifdef CONFIG_SND_OSSEMUL |
1600 | if (rmidi->ossreg) { | |
1601 | if ((int)rmidi->device == midi_map[rmidi->card->number]) { | |
1602 | snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_MIDI, rmidi->card, 0); | |
1603 | #ifdef SNDRV_OSS_INFO_DEV_MIDI | |
1604 | snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_MIDI, rmidi->card->number); | |
1605 | #endif | |
1606 | } | |
1607 | if ((int)rmidi->device == amidi_map[rmidi->card->number]) | |
1608 | snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_MIDI, rmidi->card, 1); | |
1609 | rmidi->ossreg = 0; | |
1610 | } | |
1611 | #endif /* CONFIG_SND_OSSEMUL */ | |
1da177e4 | 1612 | snd_unregister_device(SNDRV_DEVICE_TYPE_RAWMIDI, rmidi->card, rmidi->device); |
1a60d4c5 | 1613 | mutex_unlock(®ister_mutex); |
c461482c | 1614 | return 0; |
1da177e4 LT |
1615 | } |
1616 | ||
1617 | /** | |
1618 | * snd_rawmidi_set_ops - set the rawmidi operators | |
1619 | * @rmidi: the rawmidi instance | |
1620 | * @stream: the stream direction, SNDRV_RAWMIDI_STREAM_XXX | |
1621 | * @ops: the operator table | |
1622 | * | |
1623 | * Sets the rawmidi operators for the given stream direction. | |
1624 | */ | |
48c9d417 TI |
1625 | void snd_rawmidi_set_ops(struct snd_rawmidi *rmidi, int stream, |
1626 | struct snd_rawmidi_ops *ops) | |
1da177e4 LT |
1627 | { |
1628 | struct list_head *list; | |
48c9d417 | 1629 | struct snd_rawmidi_substream *substream; |
1da177e4 LT |
1630 | |
1631 | list_for_each(list, &rmidi->streams[stream].substreams) { | |
48c9d417 | 1632 | substream = list_entry(list, struct snd_rawmidi_substream, list); |
1da177e4 LT |
1633 | substream->ops = ops; |
1634 | } | |
1635 | } | |
1636 | ||
1637 | /* | |
1638 | * ENTRY functions | |
1639 | */ | |
1640 | ||
1641 | static int __init alsa_rawmidi_init(void) | |
1642 | { | |
1643 | ||
1644 | snd_ctl_register_ioctl(snd_rawmidi_control_ioctl); | |
1645 | snd_ctl_register_ioctl_compat(snd_rawmidi_control_ioctl); | |
1646 | #ifdef CONFIG_SND_OSSEMUL | |
1647 | { int i; | |
1648 | /* check device map table */ | |
1649 | for (i = 0; i < SNDRV_CARDS; i++) { | |
1650 | if (midi_map[i] < 0 || midi_map[i] >= SNDRV_RAWMIDI_DEVICES) { | |
1651 | snd_printk(KERN_ERR "invalid midi_map[%d] = %d\n", i, midi_map[i]); | |
1652 | midi_map[i] = 0; | |
1653 | } | |
1654 | if (amidi_map[i] < 0 || amidi_map[i] >= SNDRV_RAWMIDI_DEVICES) { | |
1655 | snd_printk(KERN_ERR "invalid amidi_map[%d] = %d\n", i, amidi_map[i]); | |
1656 | amidi_map[i] = 1; | |
1657 | } | |
1658 | } | |
1659 | } | |
1660 | #endif /* CONFIG_SND_OSSEMUL */ | |
1661 | return 0; | |
1662 | } | |
1663 | ||
1664 | static void __exit alsa_rawmidi_exit(void) | |
1665 | { | |
1666 | snd_ctl_unregister_ioctl(snd_rawmidi_control_ioctl); | |
1667 | snd_ctl_unregister_ioctl_compat(snd_rawmidi_control_ioctl); | |
1668 | } | |
1669 | ||
1670 | module_init(alsa_rawmidi_init) | |
1671 | module_exit(alsa_rawmidi_exit) | |
1672 | ||
1673 | EXPORT_SYMBOL(snd_rawmidi_output_params); | |
1674 | EXPORT_SYMBOL(snd_rawmidi_input_params); | |
1675 | EXPORT_SYMBOL(snd_rawmidi_drop_output); | |
1676 | EXPORT_SYMBOL(snd_rawmidi_drain_output); | |
1677 | EXPORT_SYMBOL(snd_rawmidi_drain_input); | |
1678 | EXPORT_SYMBOL(snd_rawmidi_receive); | |
1679 | EXPORT_SYMBOL(snd_rawmidi_transmit_empty); | |
1680 | EXPORT_SYMBOL(snd_rawmidi_transmit_peek); | |
1681 | EXPORT_SYMBOL(snd_rawmidi_transmit_ack); | |
1682 | EXPORT_SYMBOL(snd_rawmidi_transmit); | |
1683 | EXPORT_SYMBOL(snd_rawmidi_new); | |
1684 | EXPORT_SYMBOL(snd_rawmidi_set_ops); | |
1da177e4 LT |
1685 | EXPORT_SYMBOL(snd_rawmidi_info_select); |
1686 | EXPORT_SYMBOL(snd_rawmidi_kernel_open); | |
1687 | EXPORT_SYMBOL(snd_rawmidi_kernel_release); | |
1688 | EXPORT_SYMBOL(snd_rawmidi_kernel_read); | |
1689 | EXPORT_SYMBOL(snd_rawmidi_kernel_write); |