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 | ||
9a1b64ca TI |
227 | /* look for an available substream for the given stream direction; |
228 | * if a specific subdevice is given, try to assign it | |
229 | */ | |
230 | static int assign_substream(struct snd_rawmidi *rmidi, int subdevice, | |
231 | int stream, int mode, | |
232 | struct snd_rawmidi_substream **sub_ret) | |
1da177e4 | 233 | { |
9a1b64ca TI |
234 | struct snd_rawmidi_substream *substream; |
235 | struct snd_rawmidi_str *s = &rmidi->streams[stream]; | |
236 | static unsigned int info_flags[2] = { | |
237 | [SNDRV_RAWMIDI_STREAM_OUTPUT] = SNDRV_RAWMIDI_INFO_OUTPUT, | |
238 | [SNDRV_RAWMIDI_STREAM_INPUT] = SNDRV_RAWMIDI_INFO_INPUT, | |
239 | }; | |
1da177e4 | 240 | |
9a1b64ca | 241 | if (!(rmidi->info_flags & info_flags[stream])) |
f9d20283 | 242 | return -ENXIO; |
9a1b64ca TI |
243 | if (subdevice >= 0 && subdevice >= s->substream_count) |
244 | return -ENODEV; | |
245 | if (s->substream_opened >= s->substream_count) | |
246 | return -EAGAIN; | |
247 | ||
248 | list_for_each_entry(substream, &s->substreams, list) { | |
249 | if (substream->opened) { | |
250 | if (stream == SNDRV_RAWMIDI_STREAM_INPUT || | |
251 | !(mode & SNDRV_RAWMIDI_LFLG_APPEND)) | |
252 | continue; | |
253 | } | |
254 | if (subdevice < 0 || subdevice == substream->number) { | |
255 | *sub_ret = substream; | |
256 | return 0; | |
257 | } | |
1da177e4 | 258 | } |
9a1b64ca TI |
259 | return -EAGAIN; |
260 | } | |
f9d20283 | 261 | |
9a1b64ca TI |
262 | /* open and do ref-counting for the given substream */ |
263 | static int open_substream(struct snd_rawmidi *rmidi, | |
264 | struct snd_rawmidi_substream *substream, | |
265 | int mode) | |
266 | { | |
267 | int err; | |
268 | ||
269 | err = snd_rawmidi_runtime_create(substream); | |
270 | if (err < 0) | |
271 | return err; | |
272 | err = substream->ops->open(substream); | |
273 | if (err < 0) | |
274 | return err; | |
275 | substream->opened = 1; | |
276 | if (substream->use_count++ == 0) | |
2d4b8420 | 277 | substream->active_sensing = 0; |
9a1b64ca TI |
278 | if (mode & SNDRV_RAWMIDI_LFLG_APPEND) |
279 | substream->append = 1; | |
280 | rmidi->streams[substream->stream].substream_opened++; | |
281 | return 0; | |
282 | } | |
283 | ||
284 | static void close_substream(struct snd_rawmidi *rmidi, | |
285 | struct snd_rawmidi_substream *substream, | |
286 | int cleanup); | |
287 | ||
288 | static int rawmidi_open_priv(struct snd_rawmidi *rmidi, int subdevice, int mode, | |
289 | struct snd_rawmidi_file *rfile) | |
290 | { | |
291 | struct snd_rawmidi_substream *sinput = NULL, *soutput = NULL; | |
292 | int err; | |
293 | ||
294 | rfile->input = rfile->output = NULL; | |
1da177e4 | 295 | if (mode & SNDRV_RAWMIDI_LFLG_INPUT) { |
9a1b64ca TI |
296 | err = assign_substream(rmidi, subdevice, |
297 | SNDRV_RAWMIDI_STREAM_INPUT, | |
298 | mode, &sinput); | |
299 | if (err < 0) | |
1da177e4 | 300 | goto __error; |
1da177e4 LT |
301 | } |
302 | if (mode & SNDRV_RAWMIDI_LFLG_OUTPUT) { | |
9a1b64ca TI |
303 | err = assign_substream(rmidi, subdevice, |
304 | SNDRV_RAWMIDI_STREAM_OUTPUT, | |
305 | mode, &soutput); | |
306 | if (err < 0) | |
1da177e4 | 307 | goto __error; |
1da177e4 | 308 | } |
9a1b64ca TI |
309 | |
310 | if (sinput) { | |
311 | err = open_substream(rmidi, sinput, mode); | |
312 | if (err < 0) | |
1da177e4 | 313 | goto __error; |
1da177e4 | 314 | } |
9a1b64ca TI |
315 | if (soutput) { |
316 | err = open_substream(rmidi, soutput, mode); | |
317 | if (err < 0) { | |
318 | if (sinput) | |
319 | close_substream(rmidi, sinput, 0); | |
1da177e4 LT |
320 | goto __error; |
321 | } | |
1da177e4 | 322 | } |
9a1b64ca TI |
323 | |
324 | rfile->rmidi = rmidi; | |
325 | rfile->input = sinput; | |
326 | rfile->output = soutput; | |
1da177e4 LT |
327 | return 0; |
328 | ||
329 | __error: | |
9a1b64ca | 330 | if (sinput && sinput->runtime) |
1da177e4 | 331 | snd_rawmidi_runtime_free(sinput); |
9a1b64ca | 332 | if (soutput && soutput->runtime) |
1da177e4 | 333 | snd_rawmidi_runtime_free(soutput); |
9a1b64ca TI |
334 | return err; |
335 | } | |
336 | ||
337 | /* called from sound/core/seq/seq_midi.c */ | |
338 | int snd_rawmidi_kernel_open(struct snd_card *card, int device, int subdevice, | |
339 | int mode, struct snd_rawmidi_file * rfile) | |
340 | { | |
341 | struct snd_rawmidi *rmidi; | |
342 | int err; | |
343 | ||
344 | if (snd_BUG_ON(!rfile)) | |
345 | return -EINVAL; | |
346 | ||
347 | mutex_lock(®ister_mutex); | |
348 | rmidi = snd_rawmidi_search(card, device); | |
349 | if (rmidi == NULL) { | |
350 | mutex_unlock(®ister_mutex); | |
351 | return -ENODEV; | |
352 | } | |
353 | if (!try_module_get(rmidi->card->module)) { | |
354 | mutex_unlock(®ister_mutex); | |
355 | return -ENXIO; | |
356 | } | |
357 | mutex_unlock(®ister_mutex); | |
358 | ||
359 | mutex_lock(&rmidi->open_mutex); | |
360 | err = rawmidi_open_priv(rmidi, subdevice, mode, rfile); | |
361 | mutex_unlock(&rmidi->open_mutex); | |
362 | if (err < 0) | |
363 | module_put(rmidi->card->module); | |
1da177e4 LT |
364 | return err; |
365 | } | |
366 | ||
367 | static int snd_rawmidi_open(struct inode *inode, struct file *file) | |
368 | { | |
369 | int maj = imajor(inode); | |
48c9d417 | 370 | struct snd_card *card; |
f87135f5 | 371 | int subdevice; |
1da177e4 LT |
372 | unsigned short fflags; |
373 | int err; | |
48c9d417 | 374 | struct snd_rawmidi *rmidi; |
9a1b64ca | 375 | struct snd_rawmidi_file *rawmidi_file = NULL; |
1da177e4 | 376 | wait_queue_t wait; |
48c9d417 | 377 | struct snd_ctl_file *kctl; |
1da177e4 | 378 | |
9a1b64ca TI |
379 | if ((file->f_flags & O_APPEND) && !(file->f_flags & O_NONBLOCK)) |
380 | return -EINVAL; /* invalid combination */ | |
381 | ||
f1902860 | 382 | if (maj == snd_major) { |
f87135f5 CL |
383 | rmidi = snd_lookup_minor_data(iminor(inode), |
384 | SNDRV_DEVICE_TYPE_RAWMIDI); | |
1da177e4 | 385 | #ifdef CONFIG_SND_OSSEMUL |
f1902860 | 386 | } else if (maj == SOUND_MAJOR) { |
f87135f5 CL |
387 | rmidi = snd_lookup_oss_minor_data(iminor(inode), |
388 | SNDRV_OSS_DEVICE_TYPE_MIDI); | |
1da177e4 | 389 | #endif |
f1902860 | 390 | } else |
1da177e4 | 391 | return -ENXIO; |
1da177e4 | 392 | |
1da177e4 LT |
393 | if (rmidi == NULL) |
394 | return -ENODEV; | |
9a1b64ca TI |
395 | |
396 | if (!try_module_get(rmidi->card->module)) | |
397 | return -ENXIO; | |
398 | ||
399 | mutex_lock(&rmidi->open_mutex); | |
1da177e4 LT |
400 | card = rmidi->card; |
401 | err = snd_card_file_add(card, file); | |
402 | if (err < 0) | |
9a1b64ca | 403 | goto __error_card; |
1da177e4 | 404 | fflags = snd_rawmidi_file_flags(file); |
f1902860 | 405 | if ((file->f_flags & O_APPEND) || maj == SOUND_MAJOR) /* OSS emul? */ |
1da177e4 | 406 | fflags |= SNDRV_RAWMIDI_LFLG_APPEND; |
1da177e4 LT |
407 | rawmidi_file = kmalloc(sizeof(*rawmidi_file), GFP_KERNEL); |
408 | if (rawmidi_file == NULL) { | |
9a1b64ca TI |
409 | err = -ENOMEM; |
410 | goto __error; | |
1da177e4 LT |
411 | } |
412 | init_waitqueue_entry(&wait, current); | |
413 | add_wait_queue(&rmidi->open_wait, &wait); | |
1da177e4 LT |
414 | while (1) { |
415 | subdevice = -1; | |
399ccdc1 | 416 | read_lock(&card->ctl_files_rwlock); |
9244b2c3 | 417 | list_for_each_entry(kctl, &card->ctl_files, list) { |
1da177e4 LT |
418 | if (kctl->pid == current->pid) { |
419 | subdevice = kctl->prefer_rawmidi_subdevice; | |
2529bba7 TI |
420 | if (subdevice != -1) |
421 | break; | |
1da177e4 LT |
422 | } |
423 | } | |
399ccdc1 | 424 | read_unlock(&card->ctl_files_rwlock); |
9a1b64ca | 425 | err = rawmidi_open_priv(rmidi, subdevice, fflags, rawmidi_file); |
1da177e4 LT |
426 | if (err >= 0) |
427 | break; | |
428 | if (err == -EAGAIN) { | |
429 | if (file->f_flags & O_NONBLOCK) { | |
430 | err = -EBUSY; | |
431 | break; | |
432 | } | |
433 | } else | |
434 | break; | |
435 | set_current_state(TASK_INTERRUPTIBLE); | |
1a60d4c5 | 436 | mutex_unlock(&rmidi->open_mutex); |
1da177e4 | 437 | schedule(); |
1a60d4c5 | 438 | mutex_lock(&rmidi->open_mutex); |
1da177e4 LT |
439 | if (signal_pending(current)) { |
440 | err = -ERESTARTSYS; | |
441 | break; | |
442 | } | |
443 | } | |
9a1b64ca TI |
444 | remove_wait_queue(&rmidi->open_wait, &wait); |
445 | if (err < 0) { | |
446 | kfree(rawmidi_file); | |
447 | goto __error; | |
448 | } | |
1da177e4 LT |
449 | #ifdef CONFIG_SND_OSSEMUL |
450 | if (rawmidi_file->input && rawmidi_file->input->runtime) | |
451 | rawmidi_file->input->runtime->oss = (maj == SOUND_MAJOR); | |
452 | if (rawmidi_file->output && rawmidi_file->output->runtime) | |
453 | rawmidi_file->output->runtime->oss = (maj == SOUND_MAJOR); | |
454 | #endif | |
9a1b64ca TI |
455 | file->private_data = rawmidi_file; |
456 | mutex_unlock(&rmidi->open_mutex); | |
457 | return 0; | |
458 | ||
459 | __error: | |
460 | snd_card_file_remove(card, file); | |
461 | __error_card: | |
1a60d4c5 | 462 | mutex_unlock(&rmidi->open_mutex); |
9a1b64ca | 463 | module_put(rmidi->card->module); |
1da177e4 LT |
464 | return err; |
465 | } | |
466 | ||
9a1b64ca TI |
467 | static void close_substream(struct snd_rawmidi *rmidi, |
468 | struct snd_rawmidi_substream *substream, | |
469 | int cleanup) | |
1da177e4 | 470 | { |
9a1b64ca TI |
471 | rmidi->streams[substream->stream].substream_opened--; |
472 | if (--substream->use_count) | |
473 | return; | |
1da177e4 | 474 | |
9a1b64ca TI |
475 | if (cleanup) { |
476 | if (substream->stream == SNDRV_RAWMIDI_STREAM_INPUT) | |
477 | snd_rawmidi_input_trigger(substream, 0); | |
478 | else { | |
1da177e4 LT |
479 | if (substream->active_sensing) { |
480 | unsigned char buf = 0xfe; | |
9a1b64ca TI |
481 | /* sending single active sensing message |
482 | * to shut the device up | |
483 | */ | |
1da177e4 LT |
484 | snd_rawmidi_kernel_write(substream, &buf, 1); |
485 | } | |
486 | if (snd_rawmidi_drain_output(substream) == -ERESTARTSYS) | |
487 | snd_rawmidi_output_trigger(substream, 0); | |
1da177e4 | 488 | } |
1da177e4 | 489 | } |
9a1b64ca TI |
490 | substream->ops->close(substream); |
491 | if (substream->runtime->private_free) | |
492 | substream->runtime->private_free(substream); | |
493 | snd_rawmidi_runtime_free(substream); | |
494 | substream->opened = 0; | |
495 | substream->append = 0; | |
496 | } | |
497 | ||
498 | static void rawmidi_release_priv(struct snd_rawmidi_file *rfile) | |
499 | { | |
500 | struct snd_rawmidi *rmidi; | |
501 | ||
502 | rmidi = rfile->rmidi; | |
503 | mutex_lock(&rmidi->open_mutex); | |
504 | if (rfile->input) { | |
505 | close_substream(rmidi, rfile->input, 1); | |
506 | rfile->input = NULL; | |
507 | } | |
508 | if (rfile->output) { | |
509 | close_substream(rmidi, rfile->output, 1); | |
510 | rfile->output = NULL; | |
511 | } | |
512 | rfile->rmidi = NULL; | |
1a60d4c5 | 513 | mutex_unlock(&rmidi->open_mutex); |
9a1b64ca TI |
514 | wake_up(&rmidi->open_wait); |
515 | } | |
516 | ||
517 | /* called from sound/core/seq/seq_midi.c */ | |
518 | int snd_rawmidi_kernel_release(struct snd_rawmidi_file *rfile) | |
519 | { | |
520 | struct snd_rawmidi *rmidi; | |
521 | ||
522 | if (snd_BUG_ON(!rfile)) | |
523 | return -ENXIO; | |
524 | ||
525 | rmidi = rfile->rmidi; | |
526 | rawmidi_release_priv(rfile); | |
1da177e4 LT |
527 | module_put(rmidi->card->module); |
528 | return 0; | |
529 | } | |
530 | ||
531 | static int snd_rawmidi_release(struct inode *inode, struct file *file) | |
532 | { | |
48c9d417 TI |
533 | struct snd_rawmidi_file *rfile; |
534 | struct snd_rawmidi *rmidi; | |
1da177e4 LT |
535 | |
536 | rfile = file->private_data; | |
1da177e4 | 537 | rmidi = rfile->rmidi; |
9a1b64ca | 538 | rawmidi_release_priv(rfile); |
1da177e4 LT |
539 | kfree(rfile); |
540 | snd_card_file_remove(rmidi->card, file); | |
9a1b64ca TI |
541 | module_put(rmidi->card->module); |
542 | return 0; | |
1da177e4 LT |
543 | } |
544 | ||
18612048 AB |
545 | static int snd_rawmidi_info(struct snd_rawmidi_substream *substream, |
546 | struct snd_rawmidi_info *info) | |
1da177e4 | 547 | { |
48c9d417 | 548 | struct snd_rawmidi *rmidi; |
1da177e4 LT |
549 | |
550 | if (substream == NULL) | |
551 | return -ENODEV; | |
552 | rmidi = substream->rmidi; | |
553 | memset(info, 0, sizeof(*info)); | |
554 | info->card = rmidi->card->number; | |
555 | info->device = rmidi->device; | |
556 | info->subdevice = substream->number; | |
557 | info->stream = substream->stream; | |
558 | info->flags = rmidi->info_flags; | |
559 | strcpy(info->id, rmidi->id); | |
560 | strcpy(info->name, rmidi->name); | |
561 | strcpy(info->subname, substream->name); | |
562 | info->subdevices_count = substream->pstr->substream_count; | |
563 | info->subdevices_avail = (substream->pstr->substream_count - | |
564 | substream->pstr->substream_opened); | |
565 | return 0; | |
566 | } | |
567 | ||
48c9d417 TI |
568 | static int snd_rawmidi_info_user(struct snd_rawmidi_substream *substream, |
569 | struct snd_rawmidi_info __user * _info) | |
1da177e4 | 570 | { |
48c9d417 | 571 | struct snd_rawmidi_info info; |
1da177e4 LT |
572 | int err; |
573 | if ((err = snd_rawmidi_info(substream, &info)) < 0) | |
574 | return err; | |
48c9d417 | 575 | if (copy_to_user(_info, &info, sizeof(struct snd_rawmidi_info))) |
1da177e4 LT |
576 | return -EFAULT; |
577 | return 0; | |
578 | } | |
579 | ||
48c9d417 | 580 | int snd_rawmidi_info_select(struct snd_card *card, struct snd_rawmidi_info *info) |
1da177e4 | 581 | { |
48c9d417 TI |
582 | struct snd_rawmidi *rmidi; |
583 | struct snd_rawmidi_str *pstr; | |
584 | struct snd_rawmidi_substream *substream; | |
f87135f5 | 585 | |
1a60d4c5 | 586 | mutex_lock(®ister_mutex); |
f87135f5 | 587 | rmidi = snd_rawmidi_search(card, info->device); |
1a60d4c5 | 588 | mutex_unlock(®ister_mutex); |
a106cd3d CL |
589 | if (!rmidi) |
590 | return -ENXIO; | |
1da177e4 LT |
591 | if (info->stream < 0 || info->stream > 1) |
592 | return -EINVAL; | |
593 | pstr = &rmidi->streams[info->stream]; | |
594 | if (pstr->substream_count == 0) | |
595 | return -ENOENT; | |
596 | if (info->subdevice >= pstr->substream_count) | |
597 | return -ENXIO; | |
9244b2c3 | 598 | list_for_each_entry(substream, &pstr->substreams, list) { |
1da177e4 LT |
599 | if ((unsigned int)substream->number == info->subdevice) |
600 | return snd_rawmidi_info(substream, info); | |
601 | } | |
602 | return -ENXIO; | |
603 | } | |
604 | ||
48c9d417 TI |
605 | static int snd_rawmidi_info_select_user(struct snd_card *card, |
606 | struct snd_rawmidi_info __user *_info) | |
1da177e4 LT |
607 | { |
608 | int err; | |
48c9d417 | 609 | struct snd_rawmidi_info info; |
1da177e4 LT |
610 | if (get_user(info.device, &_info->device)) |
611 | return -EFAULT; | |
612 | if (get_user(info.stream, &_info->stream)) | |
613 | return -EFAULT; | |
614 | if (get_user(info.subdevice, &_info->subdevice)) | |
615 | return -EFAULT; | |
616 | if ((err = snd_rawmidi_info_select(card, &info)) < 0) | |
617 | return err; | |
48c9d417 | 618 | if (copy_to_user(_info, &info, sizeof(struct snd_rawmidi_info))) |
1da177e4 LT |
619 | return -EFAULT; |
620 | return 0; | |
621 | } | |
622 | ||
48c9d417 TI |
623 | int snd_rawmidi_output_params(struct snd_rawmidi_substream *substream, |
624 | struct snd_rawmidi_params * params) | |
1da177e4 LT |
625 | { |
626 | char *newbuf; | |
48c9d417 | 627 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
1da177e4 LT |
628 | |
629 | if (substream->append && substream->use_count > 1) | |
630 | return -EBUSY; | |
631 | snd_rawmidi_drain_output(substream); | |
632 | if (params->buffer_size < 32 || params->buffer_size > 1024L * 1024L) { | |
633 | return -EINVAL; | |
634 | } | |
635 | if (params->avail_min < 1 || params->avail_min > params->buffer_size) { | |
636 | return -EINVAL; | |
637 | } | |
638 | if (params->buffer_size != runtime->buffer_size) { | |
4fa95ef6 JJ |
639 | newbuf = kmalloc(params->buffer_size, GFP_KERNEL); |
640 | if (!newbuf) | |
1da177e4 LT |
641 | return -ENOMEM; |
642 | kfree(runtime->buffer); | |
643 | runtime->buffer = newbuf; | |
644 | runtime->buffer_size = params->buffer_size; | |
1b98ea47 | 645 | runtime->avail = runtime->buffer_size; |
1da177e4 LT |
646 | } |
647 | runtime->avail_min = params->avail_min; | |
648 | substream->active_sensing = !params->no_active_sensing; | |
649 | return 0; | |
650 | } | |
651 | ||
48c9d417 TI |
652 | int snd_rawmidi_input_params(struct snd_rawmidi_substream *substream, |
653 | struct snd_rawmidi_params * params) | |
1da177e4 LT |
654 | { |
655 | char *newbuf; | |
48c9d417 | 656 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
1da177e4 LT |
657 | |
658 | snd_rawmidi_drain_input(substream); | |
659 | if (params->buffer_size < 32 || params->buffer_size > 1024L * 1024L) { | |
660 | return -EINVAL; | |
661 | } | |
662 | if (params->avail_min < 1 || params->avail_min > params->buffer_size) { | |
663 | return -EINVAL; | |
664 | } | |
665 | if (params->buffer_size != runtime->buffer_size) { | |
4fa95ef6 JJ |
666 | newbuf = kmalloc(params->buffer_size, GFP_KERNEL); |
667 | if (!newbuf) | |
1da177e4 LT |
668 | return -ENOMEM; |
669 | kfree(runtime->buffer); | |
670 | runtime->buffer = newbuf; | |
671 | runtime->buffer_size = params->buffer_size; | |
672 | } | |
673 | runtime->avail_min = params->avail_min; | |
674 | return 0; | |
675 | } | |
676 | ||
48c9d417 TI |
677 | static int snd_rawmidi_output_status(struct snd_rawmidi_substream *substream, |
678 | struct snd_rawmidi_status * status) | |
1da177e4 | 679 | { |
48c9d417 | 680 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
1da177e4 LT |
681 | |
682 | memset(status, 0, sizeof(*status)); | |
683 | status->stream = SNDRV_RAWMIDI_STREAM_OUTPUT; | |
684 | spin_lock_irq(&runtime->lock); | |
685 | status->avail = runtime->avail; | |
686 | spin_unlock_irq(&runtime->lock); | |
687 | return 0; | |
688 | } | |
689 | ||
48c9d417 TI |
690 | static int snd_rawmidi_input_status(struct snd_rawmidi_substream *substream, |
691 | struct snd_rawmidi_status * status) | |
1da177e4 | 692 | { |
48c9d417 | 693 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
1da177e4 LT |
694 | |
695 | memset(status, 0, sizeof(*status)); | |
696 | status->stream = SNDRV_RAWMIDI_STREAM_INPUT; | |
697 | spin_lock_irq(&runtime->lock); | |
698 | status->avail = runtime->avail; | |
699 | status->xruns = runtime->xruns; | |
700 | runtime->xruns = 0; | |
701 | spin_unlock_irq(&runtime->lock); | |
702 | return 0; | |
703 | } | |
704 | ||
705 | static long snd_rawmidi_ioctl(struct file *file, unsigned int cmd, unsigned long arg) | |
706 | { | |
48c9d417 | 707 | struct snd_rawmidi_file *rfile; |
1da177e4 LT |
708 | void __user *argp = (void __user *)arg; |
709 | ||
710 | rfile = file->private_data; | |
711 | if (((cmd >> 8) & 0xff) != 'W') | |
712 | return -ENOTTY; | |
713 | switch (cmd) { | |
714 | case SNDRV_RAWMIDI_IOCTL_PVERSION: | |
715 | return put_user(SNDRV_RAWMIDI_VERSION, (int __user *)argp) ? -EFAULT : 0; | |
716 | case SNDRV_RAWMIDI_IOCTL_INFO: | |
717 | { | |
48c9d417 TI |
718 | int stream; |
719 | struct snd_rawmidi_info __user *info = argp; | |
1da177e4 LT |
720 | if (get_user(stream, &info->stream)) |
721 | return -EFAULT; | |
722 | switch (stream) { | |
723 | case SNDRV_RAWMIDI_STREAM_INPUT: | |
724 | return snd_rawmidi_info_user(rfile->input, info); | |
725 | case SNDRV_RAWMIDI_STREAM_OUTPUT: | |
726 | return snd_rawmidi_info_user(rfile->output, info); | |
727 | default: | |
728 | return -EINVAL; | |
729 | } | |
730 | } | |
731 | case SNDRV_RAWMIDI_IOCTL_PARAMS: | |
732 | { | |
48c9d417 TI |
733 | struct snd_rawmidi_params params; |
734 | if (copy_from_user(¶ms, argp, sizeof(struct snd_rawmidi_params))) | |
1da177e4 LT |
735 | return -EFAULT; |
736 | switch (params.stream) { | |
737 | case SNDRV_RAWMIDI_STREAM_OUTPUT: | |
738 | if (rfile->output == NULL) | |
739 | return -EINVAL; | |
740 | return snd_rawmidi_output_params(rfile->output, ¶ms); | |
741 | case SNDRV_RAWMIDI_STREAM_INPUT: | |
742 | if (rfile->input == NULL) | |
743 | return -EINVAL; | |
744 | return snd_rawmidi_input_params(rfile->input, ¶ms); | |
745 | default: | |
746 | return -EINVAL; | |
747 | } | |
748 | } | |
749 | case SNDRV_RAWMIDI_IOCTL_STATUS: | |
750 | { | |
751 | int err = 0; | |
48c9d417 TI |
752 | struct snd_rawmidi_status status; |
753 | if (copy_from_user(&status, argp, sizeof(struct snd_rawmidi_status))) | |
1da177e4 LT |
754 | return -EFAULT; |
755 | switch (status.stream) { | |
756 | case SNDRV_RAWMIDI_STREAM_OUTPUT: | |
757 | if (rfile->output == NULL) | |
758 | return -EINVAL; | |
759 | err = snd_rawmidi_output_status(rfile->output, &status); | |
760 | break; | |
761 | case SNDRV_RAWMIDI_STREAM_INPUT: | |
762 | if (rfile->input == NULL) | |
763 | return -EINVAL; | |
764 | err = snd_rawmidi_input_status(rfile->input, &status); | |
765 | break; | |
766 | default: | |
767 | return -EINVAL; | |
768 | } | |
769 | if (err < 0) | |
770 | return err; | |
48c9d417 | 771 | if (copy_to_user(argp, &status, sizeof(struct snd_rawmidi_status))) |
1da177e4 LT |
772 | return -EFAULT; |
773 | return 0; | |
774 | } | |
775 | case SNDRV_RAWMIDI_IOCTL_DROP: | |
776 | { | |
777 | int val; | |
778 | if (get_user(val, (int __user *) argp)) | |
779 | return -EFAULT; | |
780 | switch (val) { | |
781 | case SNDRV_RAWMIDI_STREAM_OUTPUT: | |
782 | if (rfile->output == NULL) | |
783 | return -EINVAL; | |
784 | return snd_rawmidi_drop_output(rfile->output); | |
785 | default: | |
786 | return -EINVAL; | |
787 | } | |
788 | } | |
789 | case SNDRV_RAWMIDI_IOCTL_DRAIN: | |
790 | { | |
791 | int val; | |
792 | if (get_user(val, (int __user *) argp)) | |
793 | return -EFAULT; | |
794 | switch (val) { | |
795 | case SNDRV_RAWMIDI_STREAM_OUTPUT: | |
796 | if (rfile->output == NULL) | |
797 | return -EINVAL; | |
798 | return snd_rawmidi_drain_output(rfile->output); | |
799 | case SNDRV_RAWMIDI_STREAM_INPUT: | |
800 | if (rfile->input == NULL) | |
801 | return -EINVAL; | |
802 | return snd_rawmidi_drain_input(rfile->input); | |
803 | default: | |
804 | return -EINVAL; | |
805 | } | |
806 | } | |
807 | #ifdef CONFIG_SND_DEBUG | |
808 | default: | |
809 | snd_printk(KERN_WARNING "rawmidi: unknown command = 0x%x\n", cmd); | |
810 | #endif | |
811 | } | |
812 | return -ENOTTY; | |
813 | } | |
814 | ||
48c9d417 TI |
815 | static int snd_rawmidi_control_ioctl(struct snd_card *card, |
816 | struct snd_ctl_file *control, | |
1da177e4 LT |
817 | unsigned int cmd, |
818 | unsigned long arg) | |
819 | { | |
820 | void __user *argp = (void __user *)arg; | |
1da177e4 | 821 | |
1da177e4 LT |
822 | switch (cmd) { |
823 | case SNDRV_CTL_IOCTL_RAWMIDI_NEXT_DEVICE: | |
824 | { | |
825 | int device; | |
826 | ||
827 | if (get_user(device, (int __user *)argp)) | |
828 | return -EFAULT; | |
1a60d4c5 | 829 | mutex_lock(®ister_mutex); |
1da177e4 LT |
830 | device = device < 0 ? 0 : device + 1; |
831 | while (device < SNDRV_RAWMIDI_DEVICES) { | |
f87135f5 | 832 | if (snd_rawmidi_search(card, device)) |
1da177e4 LT |
833 | break; |
834 | device++; | |
835 | } | |
836 | if (device == SNDRV_RAWMIDI_DEVICES) | |
837 | device = -1; | |
1a60d4c5 | 838 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
839 | if (put_user(device, (int __user *)argp)) |
840 | return -EFAULT; | |
841 | return 0; | |
842 | } | |
843 | case SNDRV_CTL_IOCTL_RAWMIDI_PREFER_SUBDEVICE: | |
844 | { | |
845 | int val; | |
846 | ||
847 | if (get_user(val, (int __user *)argp)) | |
848 | return -EFAULT; | |
849 | control->prefer_rawmidi_subdevice = val; | |
850 | return 0; | |
851 | } | |
852 | case SNDRV_CTL_IOCTL_RAWMIDI_INFO: | |
853 | return snd_rawmidi_info_select_user(card, argp); | |
854 | } | |
855 | return -ENOIOCTLCMD; | |
856 | } | |
857 | ||
858 | /** | |
859 | * snd_rawmidi_receive - receive the input data from the device | |
860 | * @substream: the rawmidi substream | |
861 | * @buffer: the buffer pointer | |
862 | * @count: the data size to read | |
863 | * | |
864 | * Reads the data from the internal buffer. | |
865 | * | |
866 | * Returns the size of read data, or a negative error code on failure. | |
867 | */ | |
48c9d417 TI |
868 | int snd_rawmidi_receive(struct snd_rawmidi_substream *substream, |
869 | const unsigned char *buffer, int count) | |
1da177e4 LT |
870 | { |
871 | unsigned long flags; | |
872 | int result = 0, count1; | |
48c9d417 | 873 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
1da177e4 | 874 | |
219df32f TI |
875 | if (!substream->opened) |
876 | return -EBADFD; | |
1da177e4 LT |
877 | if (runtime->buffer == NULL) { |
878 | snd_printd("snd_rawmidi_receive: input is not active!!!\n"); | |
879 | return -EINVAL; | |
880 | } | |
881 | spin_lock_irqsave(&runtime->lock, flags); | |
882 | if (count == 1) { /* special case, faster code */ | |
883 | substream->bytes++; | |
884 | if (runtime->avail < runtime->buffer_size) { | |
885 | runtime->buffer[runtime->hw_ptr++] = buffer[0]; | |
886 | runtime->hw_ptr %= runtime->buffer_size; | |
887 | runtime->avail++; | |
888 | result++; | |
889 | } else { | |
890 | runtime->xruns++; | |
891 | } | |
892 | } else { | |
893 | substream->bytes += count; | |
894 | count1 = runtime->buffer_size - runtime->hw_ptr; | |
895 | if (count1 > count) | |
896 | count1 = count; | |
897 | if (count1 > (int)(runtime->buffer_size - runtime->avail)) | |
898 | count1 = runtime->buffer_size - runtime->avail; | |
899 | memcpy(runtime->buffer + runtime->hw_ptr, buffer, count1); | |
900 | runtime->hw_ptr += count1; | |
901 | runtime->hw_ptr %= runtime->buffer_size; | |
902 | runtime->avail += count1; | |
903 | count -= count1; | |
904 | result += count1; | |
905 | if (count > 0) { | |
906 | buffer += count1; | |
907 | count1 = count; | |
908 | if (count1 > (int)(runtime->buffer_size - runtime->avail)) { | |
909 | count1 = runtime->buffer_size - runtime->avail; | |
910 | runtime->xruns += count - count1; | |
911 | } | |
912 | if (count1 > 0) { | |
913 | memcpy(runtime->buffer, buffer, count1); | |
914 | runtime->hw_ptr = count1; | |
915 | runtime->avail += count1; | |
916 | result += count1; | |
917 | } | |
918 | } | |
919 | } | |
920 | if (result > 0) { | |
921 | if (runtime->event) | |
1f04128a | 922 | tasklet_schedule(&runtime->tasklet); |
1da177e4 LT |
923 | else if (snd_rawmidi_ready(substream)) |
924 | wake_up(&runtime->sleep); | |
925 | } | |
926 | spin_unlock_irqrestore(&runtime->lock, flags); | |
927 | return result; | |
928 | } | |
929 | ||
48c9d417 | 930 | static long snd_rawmidi_kernel_read1(struct snd_rawmidi_substream *substream, |
17596a80 MÅš |
931 | unsigned char __user *userbuf, |
932 | unsigned char *kernelbuf, long count) | |
1da177e4 LT |
933 | { |
934 | unsigned long flags; | |
935 | long result = 0, count1; | |
48c9d417 | 936 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
1da177e4 LT |
937 | |
938 | while (count > 0 && runtime->avail) { | |
939 | count1 = runtime->buffer_size - runtime->appl_ptr; | |
940 | if (count1 > count) | |
941 | count1 = count; | |
942 | spin_lock_irqsave(&runtime->lock, flags); | |
943 | if (count1 > (int)runtime->avail) | |
944 | count1 = runtime->avail; | |
17596a80 MÅš |
945 | if (kernelbuf) |
946 | memcpy(kernelbuf + result, runtime->buffer + runtime->appl_ptr, count1); | |
947 | if (userbuf) { | |
1da177e4 | 948 | spin_unlock_irqrestore(&runtime->lock, flags); |
17596a80 | 949 | if (copy_to_user(userbuf + result, |
1da177e4 LT |
950 | runtime->buffer + runtime->appl_ptr, count1)) { |
951 | return result > 0 ? result : -EFAULT; | |
952 | } | |
953 | spin_lock_irqsave(&runtime->lock, flags); | |
954 | } | |
955 | runtime->appl_ptr += count1; | |
956 | runtime->appl_ptr %= runtime->buffer_size; | |
957 | runtime->avail -= count1; | |
958 | spin_unlock_irqrestore(&runtime->lock, flags); | |
959 | result += count1; | |
960 | count -= count1; | |
961 | } | |
962 | return result; | |
963 | } | |
964 | ||
48c9d417 TI |
965 | long snd_rawmidi_kernel_read(struct snd_rawmidi_substream *substream, |
966 | unsigned char *buf, long count) | |
1da177e4 LT |
967 | { |
968 | snd_rawmidi_input_trigger(substream, 1); | |
17596a80 | 969 | return snd_rawmidi_kernel_read1(substream, NULL/*userbuf*/, buf, count); |
1da177e4 LT |
970 | } |
971 | ||
48c9d417 TI |
972 | static ssize_t snd_rawmidi_read(struct file *file, char __user *buf, size_t count, |
973 | loff_t *offset) | |
1da177e4 LT |
974 | { |
975 | long result; | |
976 | int count1; | |
48c9d417 TI |
977 | struct snd_rawmidi_file *rfile; |
978 | struct snd_rawmidi_substream *substream; | |
979 | struct snd_rawmidi_runtime *runtime; | |
1da177e4 LT |
980 | |
981 | rfile = file->private_data; | |
982 | substream = rfile->input; | |
983 | if (substream == NULL) | |
984 | return -EIO; | |
985 | runtime = substream->runtime; | |
986 | snd_rawmidi_input_trigger(substream, 1); | |
987 | result = 0; | |
988 | while (count > 0) { | |
989 | spin_lock_irq(&runtime->lock); | |
990 | while (!snd_rawmidi_ready(substream)) { | |
991 | wait_queue_t wait; | |
992 | if ((file->f_flags & O_NONBLOCK) != 0 || result > 0) { | |
993 | spin_unlock_irq(&runtime->lock); | |
994 | return result > 0 ? result : -EAGAIN; | |
995 | } | |
996 | init_waitqueue_entry(&wait, current); | |
997 | add_wait_queue(&runtime->sleep, &wait); | |
998 | set_current_state(TASK_INTERRUPTIBLE); | |
999 | spin_unlock_irq(&runtime->lock); | |
1000 | schedule(); | |
1001 | remove_wait_queue(&runtime->sleep, &wait); | |
1002 | if (signal_pending(current)) | |
1003 | return result > 0 ? result : -ERESTARTSYS; | |
1004 | if (!runtime->avail) | |
1005 | return result > 0 ? result : -EIO; | |
1006 | spin_lock_irq(&runtime->lock); | |
1007 | } | |
1008 | spin_unlock_irq(&runtime->lock); | |
4d23359b | 1009 | count1 = snd_rawmidi_kernel_read1(substream, |
17596a80 MÅš |
1010 | (unsigned char __user *)buf, |
1011 | NULL/*kernelbuf*/, | |
1012 | count); | |
1da177e4 LT |
1013 | if (count1 < 0) |
1014 | return result > 0 ? result : count1; | |
1015 | result += count1; | |
1016 | buf += count1; | |
1017 | count -= count1; | |
1018 | } | |
1019 | return result; | |
1020 | } | |
1021 | ||
1022 | /** | |
1023 | * snd_rawmidi_transmit_empty - check whether the output buffer is empty | |
1024 | * @substream: the rawmidi substream | |
1025 | * | |
1026 | * Returns 1 if the internal output buffer is empty, 0 if not. | |
1027 | */ | |
48c9d417 | 1028 | int snd_rawmidi_transmit_empty(struct snd_rawmidi_substream *substream) |
1da177e4 | 1029 | { |
48c9d417 | 1030 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
1da177e4 LT |
1031 | int result; |
1032 | unsigned long flags; | |
1033 | ||
1034 | if (runtime->buffer == NULL) { | |
1035 | snd_printd("snd_rawmidi_transmit_empty: output is not active!!!\n"); | |
1036 | return 1; | |
1037 | } | |
1038 | spin_lock_irqsave(&runtime->lock, flags); | |
1039 | result = runtime->avail >= runtime->buffer_size; | |
1040 | spin_unlock_irqrestore(&runtime->lock, flags); | |
1041 | return result; | |
1042 | } | |
1043 | ||
1044 | /** | |
1045 | * snd_rawmidi_transmit_peek - copy data from the internal buffer | |
1046 | * @substream: the rawmidi substream | |
1047 | * @buffer: the buffer pointer | |
1048 | * @count: data size to transfer | |
1049 | * | |
1050 | * Copies data from the internal output buffer to the given buffer. | |
1051 | * | |
1052 | * Call this in the interrupt handler when the midi output is ready, | |
1053 | * and call snd_rawmidi_transmit_ack() after the transmission is | |
1054 | * finished. | |
1055 | * | |
1056 | * Returns the size of copied data, or a negative error code on failure. | |
1057 | */ | |
48c9d417 TI |
1058 | int snd_rawmidi_transmit_peek(struct snd_rawmidi_substream *substream, |
1059 | unsigned char *buffer, int count) | |
1da177e4 LT |
1060 | { |
1061 | unsigned long flags; | |
1062 | int result, count1; | |
48c9d417 | 1063 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
1da177e4 LT |
1064 | |
1065 | if (runtime->buffer == NULL) { | |
1066 | snd_printd("snd_rawmidi_transmit_peek: output is not active!!!\n"); | |
1067 | return -EINVAL; | |
1068 | } | |
1069 | result = 0; | |
1070 | spin_lock_irqsave(&runtime->lock, flags); | |
1071 | if (runtime->avail >= runtime->buffer_size) { | |
1072 | /* warning: lowlevel layer MUST trigger down the hardware */ | |
1073 | goto __skip; | |
1074 | } | |
1075 | if (count == 1) { /* special case, faster code */ | |
1076 | *buffer = runtime->buffer[runtime->hw_ptr]; | |
1077 | result++; | |
1078 | } else { | |
1079 | count1 = runtime->buffer_size - runtime->hw_ptr; | |
1080 | if (count1 > count) | |
1081 | count1 = count; | |
1082 | if (count1 > (int)(runtime->buffer_size - runtime->avail)) | |
1083 | count1 = runtime->buffer_size - runtime->avail; | |
1084 | memcpy(buffer, runtime->buffer + runtime->hw_ptr, count1); | |
1085 | count -= count1; | |
1086 | result += count1; | |
1087 | if (count > 0) { | |
1088 | if (count > (int)(runtime->buffer_size - runtime->avail - count1)) | |
1089 | count = runtime->buffer_size - runtime->avail - count1; | |
1090 | memcpy(buffer + count1, runtime->buffer, count); | |
1091 | result += count; | |
1092 | } | |
1093 | } | |
1094 | __skip: | |
1095 | spin_unlock_irqrestore(&runtime->lock, flags); | |
1096 | return result; | |
1097 | } | |
1098 | ||
1099 | /** | |
1100 | * snd_rawmidi_transmit_ack - acknowledge the transmission | |
1101 | * @substream: the rawmidi substream | |
1102 | * @count: the tranferred count | |
1103 | * | |
1104 | * Advances the hardware pointer for the internal output buffer with | |
1105 | * the given size and updates the condition. | |
1106 | * Call after the transmission is finished. | |
1107 | * | |
1108 | * Returns the advanced size if successful, or a negative error code on failure. | |
1109 | */ | |
48c9d417 | 1110 | int snd_rawmidi_transmit_ack(struct snd_rawmidi_substream *substream, int count) |
1da177e4 LT |
1111 | { |
1112 | unsigned long flags; | |
48c9d417 | 1113 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
1da177e4 LT |
1114 | |
1115 | if (runtime->buffer == NULL) { | |
1116 | snd_printd("snd_rawmidi_transmit_ack: output is not active!!!\n"); | |
1117 | return -EINVAL; | |
1118 | } | |
1119 | spin_lock_irqsave(&runtime->lock, flags); | |
7eaa943c | 1120 | snd_BUG_ON(runtime->avail + count > runtime->buffer_size); |
1da177e4 LT |
1121 | runtime->hw_ptr += count; |
1122 | runtime->hw_ptr %= runtime->buffer_size; | |
1123 | runtime->avail += count; | |
1124 | substream->bytes += count; | |
1125 | if (count > 0) { | |
1126 | if (runtime->drain || snd_rawmidi_ready(substream)) | |
1127 | wake_up(&runtime->sleep); | |
1128 | } | |
1129 | spin_unlock_irqrestore(&runtime->lock, flags); | |
1130 | return count; | |
1131 | } | |
1132 | ||
1133 | /** | |
1134 | * snd_rawmidi_transmit - copy from the buffer to the device | |
1135 | * @substream: the rawmidi substream | |
df8db936 | 1136 | * @buffer: the buffer pointer |
1da177e4 LT |
1137 | * @count: the data size to transfer |
1138 | * | |
1139 | * Copies data from the buffer to the device and advances the pointer. | |
1140 | * | |
1141 | * Returns the copied size if successful, or a negative error code on failure. | |
1142 | */ | |
48c9d417 TI |
1143 | int snd_rawmidi_transmit(struct snd_rawmidi_substream *substream, |
1144 | unsigned char *buffer, int count) | |
1da177e4 | 1145 | { |
219df32f TI |
1146 | if (!substream->opened) |
1147 | return -EBADFD; | |
1da177e4 LT |
1148 | count = snd_rawmidi_transmit_peek(substream, buffer, count); |
1149 | if (count < 0) | |
1150 | return count; | |
1151 | return snd_rawmidi_transmit_ack(substream, count); | |
1152 | } | |
1153 | ||
48c9d417 | 1154 | static long snd_rawmidi_kernel_write1(struct snd_rawmidi_substream *substream, |
17596a80 MÅš |
1155 | const unsigned char __user *userbuf, |
1156 | const unsigned char *kernelbuf, | |
1157 | long count) | |
1da177e4 LT |
1158 | { |
1159 | unsigned long flags; | |
1160 | long count1, result; | |
48c9d417 | 1161 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
1da177e4 | 1162 | |
7eaa943c TI |
1163 | if (snd_BUG_ON(!kernelbuf && !userbuf)) |
1164 | return -EINVAL; | |
1165 | if (snd_BUG_ON(!runtime->buffer)) | |
1166 | return -EINVAL; | |
1da177e4 LT |
1167 | |
1168 | result = 0; | |
1169 | spin_lock_irqsave(&runtime->lock, flags); | |
1170 | if (substream->append) { | |
1171 | if ((long)runtime->avail < count) { | |
1172 | spin_unlock_irqrestore(&runtime->lock, flags); | |
1173 | return -EAGAIN; | |
1174 | } | |
1175 | } | |
1176 | while (count > 0 && runtime->avail > 0) { | |
1177 | count1 = runtime->buffer_size - runtime->appl_ptr; | |
1178 | if (count1 > count) | |
1179 | count1 = count; | |
1180 | if (count1 > (long)runtime->avail) | |
1181 | count1 = runtime->avail; | |
17596a80 MÅš |
1182 | if (kernelbuf) |
1183 | memcpy(runtime->buffer + runtime->appl_ptr, | |
1184 | kernelbuf + result, count1); | |
1185 | else if (userbuf) { | |
1da177e4 LT |
1186 | spin_unlock_irqrestore(&runtime->lock, flags); |
1187 | if (copy_from_user(runtime->buffer + runtime->appl_ptr, | |
17596a80 | 1188 | userbuf + result, count1)) { |
1da177e4 LT |
1189 | spin_lock_irqsave(&runtime->lock, flags); |
1190 | result = result > 0 ? result : -EFAULT; | |
1191 | goto __end; | |
1192 | } | |
1193 | spin_lock_irqsave(&runtime->lock, flags); | |
1194 | } | |
1195 | runtime->appl_ptr += count1; | |
1196 | runtime->appl_ptr %= runtime->buffer_size; | |
1197 | runtime->avail -= count1; | |
1198 | result += count1; | |
1da177e4 LT |
1199 | count -= count1; |
1200 | } | |
1201 | __end: | |
1202 | count1 = runtime->avail < runtime->buffer_size; | |
1203 | spin_unlock_irqrestore(&runtime->lock, flags); | |
1204 | if (count1) | |
1205 | snd_rawmidi_output_trigger(substream, 1); | |
1206 | return result; | |
1207 | } | |
1208 | ||
48c9d417 TI |
1209 | long snd_rawmidi_kernel_write(struct snd_rawmidi_substream *substream, |
1210 | const unsigned char *buf, long count) | |
1da177e4 | 1211 | { |
17596a80 | 1212 | return snd_rawmidi_kernel_write1(substream, NULL, buf, count); |
1da177e4 LT |
1213 | } |
1214 | ||
48c9d417 TI |
1215 | static ssize_t snd_rawmidi_write(struct file *file, const char __user *buf, |
1216 | size_t count, loff_t *offset) | |
1da177e4 LT |
1217 | { |
1218 | long result, timeout; | |
1219 | int count1; | |
48c9d417 TI |
1220 | struct snd_rawmidi_file *rfile; |
1221 | struct snd_rawmidi_runtime *runtime; | |
1222 | struct snd_rawmidi_substream *substream; | |
1da177e4 LT |
1223 | |
1224 | rfile = file->private_data; | |
1225 | substream = rfile->output; | |
1226 | runtime = substream->runtime; | |
1227 | /* we cannot put an atomic message to our buffer */ | |
1228 | if (substream->append && count > runtime->buffer_size) | |
1229 | return -EIO; | |
1230 | result = 0; | |
1231 | while (count > 0) { | |
1232 | spin_lock_irq(&runtime->lock); | |
1233 | while (!snd_rawmidi_ready_append(substream, count)) { | |
1234 | wait_queue_t wait; | |
1235 | if (file->f_flags & O_NONBLOCK) { | |
1236 | spin_unlock_irq(&runtime->lock); | |
1237 | return result > 0 ? result : -EAGAIN; | |
1238 | } | |
1239 | init_waitqueue_entry(&wait, current); | |
1240 | add_wait_queue(&runtime->sleep, &wait); | |
1241 | set_current_state(TASK_INTERRUPTIBLE); | |
1242 | spin_unlock_irq(&runtime->lock); | |
1243 | timeout = schedule_timeout(30 * HZ); | |
1244 | remove_wait_queue(&runtime->sleep, &wait); | |
1245 | if (signal_pending(current)) | |
1246 | return result > 0 ? result : -ERESTARTSYS; | |
1247 | if (!runtime->avail && !timeout) | |
1248 | return result > 0 ? result : -EIO; | |
1249 | spin_lock_irq(&runtime->lock); | |
1250 | } | |
1251 | spin_unlock_irq(&runtime->lock); | |
17596a80 | 1252 | count1 = snd_rawmidi_kernel_write1(substream, buf, NULL, count); |
1da177e4 LT |
1253 | if (count1 < 0) |
1254 | return result > 0 ? result : count1; | |
1255 | result += count1; | |
1256 | buf += count1; | |
1257 | if ((size_t)count1 < count && (file->f_flags & O_NONBLOCK)) | |
1258 | break; | |
1259 | count -= count1; | |
1260 | } | |
1261 | if (file->f_flags & O_SYNC) { | |
1262 | spin_lock_irq(&runtime->lock); | |
1263 | while (runtime->avail != runtime->buffer_size) { | |
1264 | wait_queue_t wait; | |
1265 | unsigned int last_avail = runtime->avail; | |
1266 | init_waitqueue_entry(&wait, current); | |
1267 | add_wait_queue(&runtime->sleep, &wait); | |
1268 | set_current_state(TASK_INTERRUPTIBLE); | |
1269 | spin_unlock_irq(&runtime->lock); | |
1270 | timeout = schedule_timeout(30 * HZ); | |
1271 | remove_wait_queue(&runtime->sleep, &wait); | |
1272 | if (signal_pending(current)) | |
1273 | return result > 0 ? result : -ERESTARTSYS; | |
1274 | if (runtime->avail == last_avail && !timeout) | |
1275 | return result > 0 ? result : -EIO; | |
1276 | spin_lock_irq(&runtime->lock); | |
1277 | } | |
1278 | spin_unlock_irq(&runtime->lock); | |
1279 | } | |
1280 | return result; | |
1281 | } | |
1282 | ||
1283 | static unsigned int snd_rawmidi_poll(struct file *file, poll_table * wait) | |
1284 | { | |
48c9d417 TI |
1285 | struct snd_rawmidi_file *rfile; |
1286 | struct snd_rawmidi_runtime *runtime; | |
1da177e4 LT |
1287 | unsigned int mask; |
1288 | ||
1289 | rfile = file->private_data; | |
1290 | if (rfile->input != NULL) { | |
1291 | runtime = rfile->input->runtime; | |
1292 | snd_rawmidi_input_trigger(rfile->input, 1); | |
1293 | poll_wait(file, &runtime->sleep, wait); | |
1294 | } | |
1295 | if (rfile->output != NULL) { | |
1296 | runtime = rfile->output->runtime; | |
1297 | poll_wait(file, &runtime->sleep, wait); | |
1298 | } | |
1299 | mask = 0; | |
1300 | if (rfile->input != NULL) { | |
1301 | if (snd_rawmidi_ready(rfile->input)) | |
1302 | mask |= POLLIN | POLLRDNORM; | |
1303 | } | |
1304 | if (rfile->output != NULL) { | |
1305 | if (snd_rawmidi_ready(rfile->output)) | |
1306 | mask |= POLLOUT | POLLWRNORM; | |
1307 | } | |
1308 | return mask; | |
1309 | } | |
1310 | ||
1311 | /* | |
1312 | */ | |
1313 | #ifdef CONFIG_COMPAT | |
1314 | #include "rawmidi_compat.c" | |
1315 | #else | |
1316 | #define snd_rawmidi_ioctl_compat NULL | |
1317 | #endif | |
1318 | ||
1319 | /* | |
1320 | ||
1321 | */ | |
1322 | ||
48c9d417 TI |
1323 | static void snd_rawmidi_proc_info_read(struct snd_info_entry *entry, |
1324 | struct snd_info_buffer *buffer) | |
1da177e4 | 1325 | { |
48c9d417 TI |
1326 | struct snd_rawmidi *rmidi; |
1327 | struct snd_rawmidi_substream *substream; | |
1328 | struct snd_rawmidi_runtime *runtime; | |
1da177e4 LT |
1329 | |
1330 | rmidi = entry->private_data; | |
1331 | snd_iprintf(buffer, "%s\n\n", rmidi->name); | |
1a60d4c5 | 1332 | mutex_lock(&rmidi->open_mutex); |
1da177e4 | 1333 | if (rmidi->info_flags & SNDRV_RAWMIDI_INFO_OUTPUT) { |
9244b2c3 JB |
1334 | list_for_each_entry(substream, |
1335 | &rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substreams, | |
1336 | list) { | |
1da177e4 LT |
1337 | snd_iprintf(buffer, |
1338 | "Output %d\n" | |
1339 | " Tx bytes : %lu\n", | |
1340 | substream->number, | |
1341 | (unsigned long) substream->bytes); | |
1342 | if (substream->opened) { | |
1343 | runtime = substream->runtime; | |
1344 | snd_iprintf(buffer, | |
1345 | " Mode : %s\n" | |
1346 | " Buffer size : %lu\n" | |
1347 | " Avail : %lu\n", | |
1348 | runtime->oss ? "OSS compatible" : "native", | |
1349 | (unsigned long) runtime->buffer_size, | |
1350 | (unsigned long) runtime->avail); | |
1351 | } | |
1352 | } | |
1353 | } | |
1354 | if (rmidi->info_flags & SNDRV_RAWMIDI_INFO_INPUT) { | |
9244b2c3 JB |
1355 | list_for_each_entry(substream, |
1356 | &rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substreams, | |
1357 | list) { | |
1da177e4 LT |
1358 | snd_iprintf(buffer, |
1359 | "Input %d\n" | |
1360 | " Rx bytes : %lu\n", | |
1361 | substream->number, | |
1362 | (unsigned long) substream->bytes); | |
1363 | if (substream->opened) { | |
1364 | runtime = substream->runtime; | |
1365 | snd_iprintf(buffer, | |
1366 | " Buffer size : %lu\n" | |
1367 | " Avail : %lu\n" | |
1368 | " Overruns : %lu\n", | |
1369 | (unsigned long) runtime->buffer_size, | |
1370 | (unsigned long) runtime->avail, | |
1371 | (unsigned long) runtime->xruns); | |
1372 | } | |
1373 | } | |
1374 | } | |
1a60d4c5 | 1375 | mutex_unlock(&rmidi->open_mutex); |
1da177e4 LT |
1376 | } |
1377 | ||
1378 | /* | |
1379 | * Register functions | |
1380 | */ | |
1381 | ||
9c2e08c5 | 1382 | static const struct file_operations snd_rawmidi_f_ops = |
1da177e4 LT |
1383 | { |
1384 | .owner = THIS_MODULE, | |
1385 | .read = snd_rawmidi_read, | |
1386 | .write = snd_rawmidi_write, | |
1387 | .open = snd_rawmidi_open, | |
1388 | .release = snd_rawmidi_release, | |
1389 | .poll = snd_rawmidi_poll, | |
1390 | .unlocked_ioctl = snd_rawmidi_ioctl, | |
1391 | .compat_ioctl = snd_rawmidi_ioctl_compat, | |
1392 | }; | |
1393 | ||
48c9d417 TI |
1394 | static int snd_rawmidi_alloc_substreams(struct snd_rawmidi *rmidi, |
1395 | struct snd_rawmidi_str *stream, | |
1da177e4 LT |
1396 | int direction, |
1397 | int count) | |
1398 | { | |
48c9d417 | 1399 | struct snd_rawmidi_substream *substream; |
1da177e4 LT |
1400 | int idx; |
1401 | ||
1da177e4 | 1402 | for (idx = 0; idx < count; idx++) { |
ca2c0966 | 1403 | substream = kzalloc(sizeof(*substream), GFP_KERNEL); |
73e77ba0 TI |
1404 | if (substream == NULL) { |
1405 | snd_printk(KERN_ERR "rawmidi: cannot allocate substream\n"); | |
1da177e4 | 1406 | return -ENOMEM; |
73e77ba0 | 1407 | } |
1da177e4 LT |
1408 | substream->stream = direction; |
1409 | substream->number = idx; | |
1410 | substream->rmidi = rmidi; | |
1411 | substream->pstr = stream; | |
1412 | list_add_tail(&substream->list, &stream->substreams); | |
1413 | stream->substream_count++; | |
1414 | } | |
1415 | return 0; | |
1416 | } | |
1417 | ||
1418 | /** | |
1419 | * snd_rawmidi_new - create a rawmidi instance | |
1420 | * @card: the card instance | |
1421 | * @id: the id string | |
1422 | * @device: the device index | |
1423 | * @output_count: the number of output streams | |
1424 | * @input_count: the number of input streams | |
1425 | * @rrawmidi: the pointer to store the new rawmidi instance | |
1426 | * | |
1427 | * Creates a new rawmidi instance. | |
1428 | * Use snd_rawmidi_set_ops() to set the operators to the new instance. | |
1429 | * | |
1430 | * Returns zero if successful, or a negative error code on failure. | |
1431 | */ | |
48c9d417 | 1432 | int snd_rawmidi_new(struct snd_card *card, char *id, int device, |
1da177e4 | 1433 | int output_count, int input_count, |
48c9d417 | 1434 | struct snd_rawmidi ** rrawmidi) |
1da177e4 | 1435 | { |
48c9d417 | 1436 | struct snd_rawmidi *rmidi; |
1da177e4 | 1437 | int err; |
48c9d417 | 1438 | static struct snd_device_ops ops = { |
1da177e4 LT |
1439 | .dev_free = snd_rawmidi_dev_free, |
1440 | .dev_register = snd_rawmidi_dev_register, | |
1441 | .dev_disconnect = snd_rawmidi_dev_disconnect, | |
1da177e4 LT |
1442 | }; |
1443 | ||
7eaa943c TI |
1444 | if (snd_BUG_ON(!card)) |
1445 | return -ENXIO; | |
1446 | if (rrawmidi) | |
1447 | *rrawmidi = NULL; | |
ca2c0966 | 1448 | rmidi = kzalloc(sizeof(*rmidi), GFP_KERNEL); |
73e77ba0 TI |
1449 | if (rmidi == NULL) { |
1450 | snd_printk(KERN_ERR "rawmidi: cannot allocate\n"); | |
1da177e4 | 1451 | return -ENOMEM; |
73e77ba0 | 1452 | } |
1da177e4 LT |
1453 | rmidi->card = card; |
1454 | rmidi->device = device; | |
1a60d4c5 | 1455 | mutex_init(&rmidi->open_mutex); |
1da177e4 | 1456 | init_waitqueue_head(&rmidi->open_wait); |
c13893d7 AM |
1457 | INIT_LIST_HEAD(&rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substreams); |
1458 | INIT_LIST_HEAD(&rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substreams); | |
1459 | ||
1da177e4 LT |
1460 | if (id != NULL) |
1461 | strlcpy(rmidi->id, id, sizeof(rmidi->id)); | |
73e77ba0 TI |
1462 | if ((err = snd_rawmidi_alloc_substreams(rmidi, |
1463 | &rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT], | |
1464 | SNDRV_RAWMIDI_STREAM_INPUT, | |
1465 | input_count)) < 0) { | |
1da177e4 LT |
1466 | snd_rawmidi_free(rmidi); |
1467 | return err; | |
1468 | } | |
73e77ba0 TI |
1469 | if ((err = snd_rawmidi_alloc_substreams(rmidi, |
1470 | &rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT], | |
1471 | SNDRV_RAWMIDI_STREAM_OUTPUT, | |
1472 | output_count)) < 0) { | |
1da177e4 LT |
1473 | snd_rawmidi_free(rmidi); |
1474 | return err; | |
1475 | } | |
1476 | if ((err = snd_device_new(card, SNDRV_DEV_RAWMIDI, rmidi, &ops)) < 0) { | |
1477 | snd_rawmidi_free(rmidi); | |
1478 | return err; | |
1479 | } | |
7eaa943c TI |
1480 | if (rrawmidi) |
1481 | *rrawmidi = rmidi; | |
1da177e4 LT |
1482 | return 0; |
1483 | } | |
1484 | ||
48c9d417 | 1485 | static void snd_rawmidi_free_substreams(struct snd_rawmidi_str *stream) |
1da177e4 | 1486 | { |
48c9d417 | 1487 | struct snd_rawmidi_substream *substream; |
1da177e4 LT |
1488 | |
1489 | while (!list_empty(&stream->substreams)) { | |
48c9d417 | 1490 | substream = list_entry(stream->substreams.next, struct snd_rawmidi_substream, list); |
1da177e4 LT |
1491 | list_del(&substream->list); |
1492 | kfree(substream); | |
1493 | } | |
1494 | } | |
1495 | ||
48c9d417 | 1496 | static int snd_rawmidi_free(struct snd_rawmidi *rmidi) |
1da177e4 | 1497 | { |
7eaa943c TI |
1498 | if (!rmidi) |
1499 | return 0; | |
c461482c TI |
1500 | |
1501 | snd_info_free_entry(rmidi->proc_entry); | |
1502 | rmidi->proc_entry = NULL; | |
1503 | mutex_lock(®ister_mutex); | |
1504 | if (rmidi->ops && rmidi->ops->dev_unregister) | |
1505 | rmidi->ops->dev_unregister(rmidi); | |
1506 | mutex_unlock(®ister_mutex); | |
1507 | ||
1da177e4 LT |
1508 | snd_rawmidi_free_substreams(&rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT]); |
1509 | snd_rawmidi_free_substreams(&rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT]); | |
1510 | if (rmidi->private_free) | |
1511 | rmidi->private_free(rmidi); | |
1512 | kfree(rmidi); | |
1513 | return 0; | |
1514 | } | |
1515 | ||
48c9d417 | 1516 | static int snd_rawmidi_dev_free(struct snd_device *device) |
1da177e4 | 1517 | { |
48c9d417 | 1518 | struct snd_rawmidi *rmidi = device->device_data; |
1da177e4 LT |
1519 | return snd_rawmidi_free(rmidi); |
1520 | } | |
1521 | ||
1522 | #if defined(CONFIG_SND_SEQUENCER) || (defined(MODULE) && defined(CONFIG_SND_SEQUENCER_MODULE)) | |
48c9d417 | 1523 | static void snd_rawmidi_dev_seq_free(struct snd_seq_device *device) |
1da177e4 | 1524 | { |
48c9d417 | 1525 | struct snd_rawmidi *rmidi = device->private_data; |
1da177e4 LT |
1526 | rmidi->seq_dev = NULL; |
1527 | } | |
1528 | #endif | |
1529 | ||
48c9d417 | 1530 | static int snd_rawmidi_dev_register(struct snd_device *device) |
1da177e4 | 1531 | { |
f87135f5 | 1532 | int err; |
48c9d417 | 1533 | struct snd_info_entry *entry; |
1da177e4 | 1534 | char name[16]; |
48c9d417 | 1535 | struct snd_rawmidi *rmidi = device->device_data; |
1da177e4 LT |
1536 | |
1537 | if (rmidi->device >= SNDRV_RAWMIDI_DEVICES) | |
1538 | return -ENOMEM; | |
1a60d4c5 | 1539 | mutex_lock(®ister_mutex); |
f87135f5 | 1540 | if (snd_rawmidi_search(rmidi->card, rmidi->device)) { |
1a60d4c5 | 1541 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
1542 | return -EBUSY; |
1543 | } | |
f87135f5 | 1544 | list_add_tail(&rmidi->list, &snd_rawmidi_devices); |
1da177e4 LT |
1545 | sprintf(name, "midiC%iD%i", rmidi->card->number, rmidi->device); |
1546 | if ((err = snd_register_device(SNDRV_DEVICE_TYPE_RAWMIDI, | |
1547 | rmidi->card, rmidi->device, | |
f87135f5 | 1548 | &snd_rawmidi_f_ops, rmidi, name)) < 0) { |
1da177e4 | 1549 | snd_printk(KERN_ERR "unable to register rawmidi device %i:%i\n", rmidi->card->number, rmidi->device); |
f87135f5 | 1550 | list_del(&rmidi->list); |
1a60d4c5 | 1551 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
1552 | return err; |
1553 | } | |
1554 | if (rmidi->ops && rmidi->ops->dev_register && | |
1555 | (err = rmidi->ops->dev_register(rmidi)) < 0) { | |
1556 | snd_unregister_device(SNDRV_DEVICE_TYPE_RAWMIDI, rmidi->card, rmidi->device); | |
f87135f5 | 1557 | list_del(&rmidi->list); |
1a60d4c5 | 1558 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
1559 | return err; |
1560 | } | |
1561 | #ifdef CONFIG_SND_OSSEMUL | |
1562 | rmidi->ossreg = 0; | |
1563 | if ((int)rmidi->device == midi_map[rmidi->card->number]) { | |
1564 | if (snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_MIDI, | |
f87135f5 CL |
1565 | rmidi->card, 0, &snd_rawmidi_f_ops, |
1566 | rmidi, name) < 0) { | |
1da177e4 LT |
1567 | snd_printk(KERN_ERR "unable to register OSS rawmidi device %i:%i\n", rmidi->card->number, 0); |
1568 | } else { | |
1569 | rmidi->ossreg++; | |
1570 | #ifdef SNDRV_OSS_INFO_DEV_MIDI | |
1571 | snd_oss_info_register(SNDRV_OSS_INFO_DEV_MIDI, rmidi->card->number, rmidi->name); | |
1572 | #endif | |
1573 | } | |
1574 | } | |
1575 | if ((int)rmidi->device == amidi_map[rmidi->card->number]) { | |
1576 | if (snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_MIDI, | |
f87135f5 CL |
1577 | rmidi->card, 1, &snd_rawmidi_f_ops, |
1578 | rmidi, name) < 0) { | |
1da177e4 LT |
1579 | snd_printk(KERN_ERR "unable to register OSS rawmidi device %i:%i\n", rmidi->card->number, 1); |
1580 | } else { | |
1581 | rmidi->ossreg++; | |
1582 | } | |
1583 | } | |
1584 | #endif /* CONFIG_SND_OSSEMUL */ | |
1a60d4c5 | 1585 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
1586 | sprintf(name, "midi%d", rmidi->device); |
1587 | entry = snd_info_create_card_entry(rmidi->card, name, rmidi->card->proc_root); | |
1588 | if (entry) { | |
1589 | entry->private_data = rmidi; | |
1da177e4 LT |
1590 | entry->c.text.read = snd_rawmidi_proc_info_read; |
1591 | if (snd_info_register(entry) < 0) { | |
1592 | snd_info_free_entry(entry); | |
1593 | entry = NULL; | |
1594 | } | |
1595 | } | |
1596 | rmidi->proc_entry = entry; | |
1597 | #if defined(CONFIG_SND_SEQUENCER) || (defined(MODULE) && defined(CONFIG_SND_SEQUENCER_MODULE)) | |
1598 | if (!rmidi->ops || !rmidi->ops->dev_register) { /* own registration mechanism */ | |
1599 | if (snd_seq_device_new(rmidi->card, rmidi->device, SNDRV_SEQ_DEV_ID_MIDISYNTH, 0, &rmidi->seq_dev) >= 0) { | |
1600 | rmidi->seq_dev->private_data = rmidi; | |
1601 | rmidi->seq_dev->private_free = snd_rawmidi_dev_seq_free; | |
1602 | sprintf(rmidi->seq_dev->name, "MIDI %d-%d", rmidi->card->number, rmidi->device); | |
1603 | snd_device_register(rmidi->card, rmidi->seq_dev); | |
1604 | } | |
1605 | } | |
1606 | #endif | |
1607 | return 0; | |
1608 | } | |
1609 | ||
48c9d417 | 1610 | static int snd_rawmidi_dev_disconnect(struct snd_device *device) |
1da177e4 | 1611 | { |
48c9d417 | 1612 | struct snd_rawmidi *rmidi = device->device_data; |
1da177e4 | 1613 | |
1a60d4c5 | 1614 | mutex_lock(®ister_mutex); |
f87135f5 | 1615 | list_del_init(&rmidi->list); |
1da177e4 LT |
1616 | #ifdef CONFIG_SND_OSSEMUL |
1617 | if (rmidi->ossreg) { | |
1618 | if ((int)rmidi->device == midi_map[rmidi->card->number]) { | |
1619 | snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_MIDI, rmidi->card, 0); | |
1620 | #ifdef SNDRV_OSS_INFO_DEV_MIDI | |
1621 | snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_MIDI, rmidi->card->number); | |
1622 | #endif | |
1623 | } | |
1624 | if ((int)rmidi->device == amidi_map[rmidi->card->number]) | |
1625 | snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_MIDI, rmidi->card, 1); | |
1626 | rmidi->ossreg = 0; | |
1627 | } | |
1628 | #endif /* CONFIG_SND_OSSEMUL */ | |
1da177e4 | 1629 | snd_unregister_device(SNDRV_DEVICE_TYPE_RAWMIDI, rmidi->card, rmidi->device); |
1a60d4c5 | 1630 | mutex_unlock(®ister_mutex); |
c461482c | 1631 | return 0; |
1da177e4 LT |
1632 | } |
1633 | ||
1634 | /** | |
1635 | * snd_rawmidi_set_ops - set the rawmidi operators | |
1636 | * @rmidi: the rawmidi instance | |
1637 | * @stream: the stream direction, SNDRV_RAWMIDI_STREAM_XXX | |
1638 | * @ops: the operator table | |
1639 | * | |
1640 | * Sets the rawmidi operators for the given stream direction. | |
1641 | */ | |
48c9d417 TI |
1642 | void snd_rawmidi_set_ops(struct snd_rawmidi *rmidi, int stream, |
1643 | struct snd_rawmidi_ops *ops) | |
1da177e4 | 1644 | { |
48c9d417 | 1645 | struct snd_rawmidi_substream *substream; |
1da177e4 | 1646 | |
9244b2c3 | 1647 | list_for_each_entry(substream, &rmidi->streams[stream].substreams, list) |
1da177e4 | 1648 | substream->ops = ops; |
1da177e4 LT |
1649 | } |
1650 | ||
1651 | /* | |
1652 | * ENTRY functions | |
1653 | */ | |
1654 | ||
1655 | static int __init alsa_rawmidi_init(void) | |
1656 | { | |
1657 | ||
1658 | snd_ctl_register_ioctl(snd_rawmidi_control_ioctl); | |
1659 | snd_ctl_register_ioctl_compat(snd_rawmidi_control_ioctl); | |
1660 | #ifdef CONFIG_SND_OSSEMUL | |
1661 | { int i; | |
1662 | /* check device map table */ | |
1663 | for (i = 0; i < SNDRV_CARDS; i++) { | |
1664 | if (midi_map[i] < 0 || midi_map[i] >= SNDRV_RAWMIDI_DEVICES) { | |
1665 | snd_printk(KERN_ERR "invalid midi_map[%d] = %d\n", i, midi_map[i]); | |
1666 | midi_map[i] = 0; | |
1667 | } | |
1668 | if (amidi_map[i] < 0 || amidi_map[i] >= SNDRV_RAWMIDI_DEVICES) { | |
1669 | snd_printk(KERN_ERR "invalid amidi_map[%d] = %d\n", i, amidi_map[i]); | |
1670 | amidi_map[i] = 1; | |
1671 | } | |
1672 | } | |
1673 | } | |
1674 | #endif /* CONFIG_SND_OSSEMUL */ | |
1675 | return 0; | |
1676 | } | |
1677 | ||
1678 | static void __exit alsa_rawmidi_exit(void) | |
1679 | { | |
1680 | snd_ctl_unregister_ioctl(snd_rawmidi_control_ioctl); | |
1681 | snd_ctl_unregister_ioctl_compat(snd_rawmidi_control_ioctl); | |
1682 | } | |
1683 | ||
1684 | module_init(alsa_rawmidi_init) | |
1685 | module_exit(alsa_rawmidi_exit) | |
1686 | ||
1687 | EXPORT_SYMBOL(snd_rawmidi_output_params); | |
1688 | EXPORT_SYMBOL(snd_rawmidi_input_params); | |
1689 | EXPORT_SYMBOL(snd_rawmidi_drop_output); | |
1690 | EXPORT_SYMBOL(snd_rawmidi_drain_output); | |
1691 | EXPORT_SYMBOL(snd_rawmidi_drain_input); | |
1692 | EXPORT_SYMBOL(snd_rawmidi_receive); | |
1693 | EXPORT_SYMBOL(snd_rawmidi_transmit_empty); | |
1694 | EXPORT_SYMBOL(snd_rawmidi_transmit_peek); | |
1695 | EXPORT_SYMBOL(snd_rawmidi_transmit_ack); | |
1696 | EXPORT_SYMBOL(snd_rawmidi_transmit); | |
1697 | EXPORT_SYMBOL(snd_rawmidi_new); | |
1698 | EXPORT_SYMBOL(snd_rawmidi_set_ops); | |
1da177e4 LT |
1699 | EXPORT_SYMBOL(snd_rawmidi_info_select); |
1700 | EXPORT_SYMBOL(snd_rawmidi_kernel_open); | |
1701 | EXPORT_SYMBOL(snd_rawmidi_kernel_release); | |
1702 | EXPORT_SYMBOL(snd_rawmidi_kernel_read); | |
1703 | EXPORT_SYMBOL(snd_rawmidi_kernel_write); |