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> |
65a77217 | 30 | #include <linux/module.h> |
1da177e4 | 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 | ||
b3c705aa | 95 | static void snd_rawmidi_input_event_work(struct work_struct *work) |
1da177e4 | 96 | { |
b3c705aa TI |
97 | struct snd_rawmidi_runtime *runtime = |
98 | container_of(work, struct snd_rawmidi_runtime, event_work); | |
99 | if (runtime->event) | |
100 | runtime->event(runtime->substream); | |
1da177e4 LT |
101 | } |
102 | ||
48c9d417 | 103 | static int snd_rawmidi_runtime_create(struct snd_rawmidi_substream *substream) |
1da177e4 | 104 | { |
48c9d417 | 105 | struct snd_rawmidi_runtime *runtime; |
1da177e4 | 106 | |
ca2c0966 | 107 | if ((runtime = kzalloc(sizeof(*runtime), GFP_KERNEL)) == NULL) |
1da177e4 | 108 | return -ENOMEM; |
b3c705aa | 109 | runtime->substream = substream; |
1da177e4 LT |
110 | spin_lock_init(&runtime->lock); |
111 | init_waitqueue_head(&runtime->sleep); | |
b3c705aa | 112 | INIT_WORK(&runtime->event_work, snd_rawmidi_input_event_work); |
1da177e4 LT |
113 | runtime->event = NULL; |
114 | runtime->buffer_size = PAGE_SIZE; | |
115 | runtime->avail_min = 1; | |
116 | if (substream->stream == SNDRV_RAWMIDI_STREAM_INPUT) | |
117 | runtime->avail = 0; | |
118 | else | |
119 | runtime->avail = runtime->buffer_size; | |
120 | if ((runtime->buffer = kmalloc(runtime->buffer_size, GFP_KERNEL)) == NULL) { | |
121 | kfree(runtime); | |
122 | return -ENOMEM; | |
123 | } | |
124 | runtime->appl_ptr = runtime->hw_ptr = 0; | |
125 | substream->runtime = runtime; | |
126 | return 0; | |
127 | } | |
128 | ||
48c9d417 | 129 | static int snd_rawmidi_runtime_free(struct snd_rawmidi_substream *substream) |
1da177e4 | 130 | { |
48c9d417 | 131 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
1da177e4 LT |
132 | |
133 | kfree(runtime->buffer); | |
134 | kfree(runtime); | |
135 | substream->runtime = NULL; | |
136 | return 0; | |
137 | } | |
138 | ||
48c9d417 | 139 | static inline void snd_rawmidi_output_trigger(struct snd_rawmidi_substream *substream,int up) |
1da177e4 | 140 | { |
219df32f TI |
141 | if (!substream->opened) |
142 | return; | |
b3c705aa | 143 | substream->ops->trigger(substream, up); |
1da177e4 LT |
144 | } |
145 | ||
48c9d417 | 146 | static void snd_rawmidi_input_trigger(struct snd_rawmidi_substream *substream, int up) |
1da177e4 | 147 | { |
219df32f TI |
148 | if (!substream->opened) |
149 | return; | |
1da177e4 | 150 | substream->ops->trigger(substream, up); |
b3c705aa TI |
151 | if (!up) |
152 | cancel_work_sync(&substream->runtime->event_work); | |
1da177e4 LT |
153 | } |
154 | ||
48c9d417 | 155 | int snd_rawmidi_drop_output(struct snd_rawmidi_substream *substream) |
1da177e4 LT |
156 | { |
157 | unsigned long flags; | |
48c9d417 | 158 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
1da177e4 LT |
159 | |
160 | snd_rawmidi_output_trigger(substream, 0); | |
161 | runtime->drain = 0; | |
162 | spin_lock_irqsave(&runtime->lock, flags); | |
163 | runtime->appl_ptr = runtime->hw_ptr = 0; | |
164 | runtime->avail = runtime->buffer_size; | |
165 | spin_unlock_irqrestore(&runtime->lock, flags); | |
166 | return 0; | |
167 | } | |
168 | ||
48c9d417 | 169 | int snd_rawmidi_drain_output(struct snd_rawmidi_substream *substream) |
1da177e4 LT |
170 | { |
171 | int err; | |
172 | long timeout; | |
48c9d417 | 173 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
1da177e4 LT |
174 | |
175 | err = 0; | |
176 | runtime->drain = 1; | |
177 | timeout = wait_event_interruptible_timeout(runtime->sleep, | |
178 | (runtime->avail >= runtime->buffer_size), | |
179 | 10*HZ); | |
180 | if (signal_pending(current)) | |
181 | err = -ERESTARTSYS; | |
182 | if (runtime->avail < runtime->buffer_size && !timeout) { | |
183 | snd_printk(KERN_WARNING "rawmidi drain error (avail = %li, buffer_size = %li)\n", (long)runtime->avail, (long)runtime->buffer_size); | |
184 | err = -EIO; | |
185 | } | |
186 | runtime->drain = 0; | |
187 | if (err != -ERESTARTSYS) { | |
188 | /* we need wait a while to make sure that Tx FIFOs are empty */ | |
189 | if (substream->ops->drain) | |
190 | substream->ops->drain(substream); | |
191 | else | |
192 | msleep(50); | |
193 | snd_rawmidi_drop_output(substream); | |
194 | } | |
195 | return err; | |
196 | } | |
197 | ||
48c9d417 | 198 | int snd_rawmidi_drain_input(struct snd_rawmidi_substream *substream) |
1da177e4 LT |
199 | { |
200 | unsigned long flags; | |
48c9d417 | 201 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
1da177e4 LT |
202 | |
203 | snd_rawmidi_input_trigger(substream, 0); | |
204 | runtime->drain = 0; | |
205 | spin_lock_irqsave(&runtime->lock, flags); | |
206 | runtime->appl_ptr = runtime->hw_ptr = 0; | |
207 | runtime->avail = 0; | |
208 | spin_unlock_irqrestore(&runtime->lock, flags); | |
209 | return 0; | |
210 | } | |
211 | ||
9a1b64ca TI |
212 | /* look for an available substream for the given stream direction; |
213 | * if a specific subdevice is given, try to assign it | |
214 | */ | |
215 | static int assign_substream(struct snd_rawmidi *rmidi, int subdevice, | |
216 | int stream, int mode, | |
217 | struct snd_rawmidi_substream **sub_ret) | |
1da177e4 | 218 | { |
9a1b64ca TI |
219 | struct snd_rawmidi_substream *substream; |
220 | struct snd_rawmidi_str *s = &rmidi->streams[stream]; | |
221 | static unsigned int info_flags[2] = { | |
222 | [SNDRV_RAWMIDI_STREAM_OUTPUT] = SNDRV_RAWMIDI_INFO_OUTPUT, | |
223 | [SNDRV_RAWMIDI_STREAM_INPUT] = SNDRV_RAWMIDI_INFO_INPUT, | |
224 | }; | |
1da177e4 | 225 | |
9a1b64ca | 226 | if (!(rmidi->info_flags & info_flags[stream])) |
f9d20283 | 227 | return -ENXIO; |
9a1b64ca TI |
228 | if (subdevice >= 0 && subdevice >= s->substream_count) |
229 | return -ENODEV; | |
9a1b64ca TI |
230 | |
231 | list_for_each_entry(substream, &s->substreams, list) { | |
232 | if (substream->opened) { | |
233 | if (stream == SNDRV_RAWMIDI_STREAM_INPUT || | |
16fb1096 CL |
234 | !(mode & SNDRV_RAWMIDI_LFLG_APPEND) || |
235 | !substream->append) | |
9a1b64ca TI |
236 | continue; |
237 | } | |
238 | if (subdevice < 0 || subdevice == substream->number) { | |
239 | *sub_ret = substream; | |
240 | return 0; | |
241 | } | |
1da177e4 | 242 | } |
9a1b64ca TI |
243 | return -EAGAIN; |
244 | } | |
f9d20283 | 245 | |
9a1b64ca TI |
246 | /* open and do ref-counting for the given substream */ |
247 | static int open_substream(struct snd_rawmidi *rmidi, | |
248 | struct snd_rawmidi_substream *substream, | |
249 | int mode) | |
250 | { | |
251 | int err; | |
252 | ||
8579d2d7 CL |
253 | if (substream->use_count == 0) { |
254 | err = snd_rawmidi_runtime_create(substream); | |
255 | if (err < 0) | |
256 | return err; | |
257 | err = substream->ops->open(substream); | |
b7fe750f CL |
258 | if (err < 0) { |
259 | snd_rawmidi_runtime_free(substream); | |
8579d2d7 | 260 | return err; |
b7fe750f | 261 | } |
8579d2d7 | 262 | substream->opened = 1; |
2d4b8420 | 263 | substream->active_sensing = 0; |
8579d2d7 CL |
264 | if (mode & SNDRV_RAWMIDI_LFLG_APPEND) |
265 | substream->append = 1; | |
7584af10 | 266 | substream->pid = get_pid(task_pid(current)); |
91d12c48 | 267 | rmidi->streams[substream->stream].substream_opened++; |
8579d2d7 CL |
268 | } |
269 | substream->use_count++; | |
9a1b64ca TI |
270 | return 0; |
271 | } | |
272 | ||
273 | static void close_substream(struct snd_rawmidi *rmidi, | |
274 | struct snd_rawmidi_substream *substream, | |
275 | int cleanup); | |
276 | ||
277 | static int rawmidi_open_priv(struct snd_rawmidi *rmidi, int subdevice, int mode, | |
278 | struct snd_rawmidi_file *rfile) | |
279 | { | |
280 | struct snd_rawmidi_substream *sinput = NULL, *soutput = NULL; | |
281 | int err; | |
282 | ||
283 | rfile->input = rfile->output = NULL; | |
1da177e4 | 284 | if (mode & SNDRV_RAWMIDI_LFLG_INPUT) { |
9a1b64ca TI |
285 | err = assign_substream(rmidi, subdevice, |
286 | SNDRV_RAWMIDI_STREAM_INPUT, | |
287 | mode, &sinput); | |
288 | if (err < 0) | |
b7fe750f | 289 | return err; |
1da177e4 LT |
290 | } |
291 | if (mode & SNDRV_RAWMIDI_LFLG_OUTPUT) { | |
9a1b64ca TI |
292 | err = assign_substream(rmidi, subdevice, |
293 | SNDRV_RAWMIDI_STREAM_OUTPUT, | |
294 | mode, &soutput); | |
295 | if (err < 0) | |
b7fe750f | 296 | return err; |
1da177e4 | 297 | } |
9a1b64ca TI |
298 | |
299 | if (sinput) { | |
300 | err = open_substream(rmidi, sinput, mode); | |
301 | if (err < 0) | |
b7fe750f | 302 | return err; |
1da177e4 | 303 | } |
9a1b64ca TI |
304 | if (soutput) { |
305 | err = open_substream(rmidi, soutput, mode); | |
306 | if (err < 0) { | |
307 | if (sinput) | |
308 | close_substream(rmidi, sinput, 0); | |
b7fe750f | 309 | return err; |
1da177e4 | 310 | } |
1da177e4 | 311 | } |
9a1b64ca TI |
312 | |
313 | rfile->rmidi = rmidi; | |
314 | rfile->input = sinput; | |
315 | rfile->output = soutput; | |
1da177e4 | 316 | return 0; |
9a1b64ca TI |
317 | } |
318 | ||
319 | /* called from sound/core/seq/seq_midi.c */ | |
320 | int snd_rawmidi_kernel_open(struct snd_card *card, int device, int subdevice, | |
321 | int mode, struct snd_rawmidi_file * rfile) | |
322 | { | |
323 | struct snd_rawmidi *rmidi; | |
324 | int err; | |
325 | ||
326 | if (snd_BUG_ON(!rfile)) | |
327 | return -EINVAL; | |
328 | ||
329 | mutex_lock(®ister_mutex); | |
330 | rmidi = snd_rawmidi_search(card, device); | |
331 | if (rmidi == NULL) { | |
332 | mutex_unlock(®ister_mutex); | |
333 | return -ENODEV; | |
334 | } | |
335 | if (!try_module_get(rmidi->card->module)) { | |
336 | mutex_unlock(®ister_mutex); | |
337 | return -ENXIO; | |
338 | } | |
339 | mutex_unlock(®ister_mutex); | |
340 | ||
341 | mutex_lock(&rmidi->open_mutex); | |
342 | err = rawmidi_open_priv(rmidi, subdevice, mode, rfile); | |
343 | mutex_unlock(&rmidi->open_mutex); | |
344 | if (err < 0) | |
345 | module_put(rmidi->card->module); | |
1da177e4 LT |
346 | return err; |
347 | } | |
348 | ||
349 | static int snd_rawmidi_open(struct inode *inode, struct file *file) | |
350 | { | |
351 | int maj = imajor(inode); | |
48c9d417 | 352 | struct snd_card *card; |
f87135f5 | 353 | int subdevice; |
1da177e4 LT |
354 | unsigned short fflags; |
355 | int err; | |
48c9d417 | 356 | struct snd_rawmidi *rmidi; |
9a1b64ca | 357 | struct snd_rawmidi_file *rawmidi_file = NULL; |
1da177e4 | 358 | wait_queue_t wait; |
48c9d417 | 359 | struct snd_ctl_file *kctl; |
1da177e4 | 360 | |
9a1b64ca TI |
361 | if ((file->f_flags & O_APPEND) && !(file->f_flags & O_NONBLOCK)) |
362 | return -EINVAL; /* invalid combination */ | |
363 | ||
02f4865f TI |
364 | err = nonseekable_open(inode, file); |
365 | if (err < 0) | |
366 | return err; | |
367 | ||
f1902860 | 368 | if (maj == snd_major) { |
f87135f5 CL |
369 | rmidi = snd_lookup_minor_data(iminor(inode), |
370 | SNDRV_DEVICE_TYPE_RAWMIDI); | |
1da177e4 | 371 | #ifdef CONFIG_SND_OSSEMUL |
f1902860 | 372 | } else if (maj == SOUND_MAJOR) { |
f87135f5 CL |
373 | rmidi = snd_lookup_oss_minor_data(iminor(inode), |
374 | SNDRV_OSS_DEVICE_TYPE_MIDI); | |
1da177e4 | 375 | #endif |
f1902860 | 376 | } else |
1da177e4 | 377 | return -ENXIO; |
1da177e4 | 378 | |
1da177e4 LT |
379 | if (rmidi == NULL) |
380 | return -ENODEV; | |
9a1b64ca | 381 | |
a0830dbd TI |
382 | if (!try_module_get(rmidi->card->module)) { |
383 | snd_card_unref(rmidi->card); | |
9a1b64ca | 384 | return -ENXIO; |
a0830dbd | 385 | } |
9a1b64ca TI |
386 | |
387 | mutex_lock(&rmidi->open_mutex); | |
1da177e4 LT |
388 | card = rmidi->card; |
389 | err = snd_card_file_add(card, file); | |
390 | if (err < 0) | |
9a1b64ca | 391 | goto __error_card; |
1da177e4 | 392 | fflags = snd_rawmidi_file_flags(file); |
f1902860 | 393 | if ((file->f_flags & O_APPEND) || maj == SOUND_MAJOR) /* OSS emul? */ |
1da177e4 | 394 | fflags |= SNDRV_RAWMIDI_LFLG_APPEND; |
1da177e4 LT |
395 | rawmidi_file = kmalloc(sizeof(*rawmidi_file), GFP_KERNEL); |
396 | if (rawmidi_file == NULL) { | |
9a1b64ca TI |
397 | err = -ENOMEM; |
398 | goto __error; | |
1da177e4 LT |
399 | } |
400 | init_waitqueue_entry(&wait, current); | |
401 | add_wait_queue(&rmidi->open_wait, &wait); | |
1da177e4 LT |
402 | while (1) { |
403 | subdevice = -1; | |
399ccdc1 | 404 | read_lock(&card->ctl_files_rwlock); |
9244b2c3 | 405 | list_for_each_entry(kctl, &card->ctl_files, list) { |
25d27ede | 406 | if (kctl->pid == task_pid(current)) { |
1da177e4 | 407 | subdevice = kctl->prefer_rawmidi_subdevice; |
2529bba7 TI |
408 | if (subdevice != -1) |
409 | break; | |
1da177e4 LT |
410 | } |
411 | } | |
399ccdc1 | 412 | read_unlock(&card->ctl_files_rwlock); |
9a1b64ca | 413 | err = rawmidi_open_priv(rmidi, subdevice, fflags, rawmidi_file); |
1da177e4 LT |
414 | if (err >= 0) |
415 | break; | |
416 | if (err == -EAGAIN) { | |
417 | if (file->f_flags & O_NONBLOCK) { | |
418 | err = -EBUSY; | |
419 | break; | |
420 | } | |
421 | } else | |
422 | break; | |
423 | set_current_state(TASK_INTERRUPTIBLE); | |
1a60d4c5 | 424 | mutex_unlock(&rmidi->open_mutex); |
1da177e4 | 425 | schedule(); |
1a60d4c5 | 426 | mutex_lock(&rmidi->open_mutex); |
0914f796 TI |
427 | if (rmidi->card->shutdown) { |
428 | err = -ENODEV; | |
429 | break; | |
430 | } | |
1da177e4 LT |
431 | if (signal_pending(current)) { |
432 | err = -ERESTARTSYS; | |
433 | break; | |
434 | } | |
435 | } | |
9a1b64ca TI |
436 | remove_wait_queue(&rmidi->open_wait, &wait); |
437 | if (err < 0) { | |
438 | kfree(rawmidi_file); | |
439 | goto __error; | |
440 | } | |
1da177e4 LT |
441 | #ifdef CONFIG_SND_OSSEMUL |
442 | if (rawmidi_file->input && rawmidi_file->input->runtime) | |
443 | rawmidi_file->input->runtime->oss = (maj == SOUND_MAJOR); | |
444 | if (rawmidi_file->output && rawmidi_file->output->runtime) | |
445 | rawmidi_file->output->runtime->oss = (maj == SOUND_MAJOR); | |
446 | #endif | |
9a1b64ca TI |
447 | file->private_data = rawmidi_file; |
448 | mutex_unlock(&rmidi->open_mutex); | |
a0830dbd | 449 | snd_card_unref(rmidi->card); |
9a1b64ca TI |
450 | return 0; |
451 | ||
452 | __error: | |
453 | snd_card_file_remove(card, file); | |
454 | __error_card: | |
1a60d4c5 | 455 | mutex_unlock(&rmidi->open_mutex); |
9a1b64ca | 456 | module_put(rmidi->card->module); |
a0830dbd | 457 | snd_card_unref(rmidi->card); |
1da177e4 LT |
458 | return err; |
459 | } | |
460 | ||
9a1b64ca TI |
461 | static void close_substream(struct snd_rawmidi *rmidi, |
462 | struct snd_rawmidi_substream *substream, | |
463 | int cleanup) | |
1da177e4 | 464 | { |
9a1b64ca TI |
465 | if (--substream->use_count) |
466 | return; | |
1da177e4 | 467 | |
9a1b64ca TI |
468 | if (cleanup) { |
469 | if (substream->stream == SNDRV_RAWMIDI_STREAM_INPUT) | |
470 | snd_rawmidi_input_trigger(substream, 0); | |
471 | else { | |
1da177e4 LT |
472 | if (substream->active_sensing) { |
473 | unsigned char buf = 0xfe; | |
9a1b64ca TI |
474 | /* sending single active sensing message |
475 | * to shut the device up | |
476 | */ | |
1da177e4 LT |
477 | snd_rawmidi_kernel_write(substream, &buf, 1); |
478 | } | |
479 | if (snd_rawmidi_drain_output(substream) == -ERESTARTSYS) | |
480 | snd_rawmidi_output_trigger(substream, 0); | |
1da177e4 | 481 | } |
1da177e4 | 482 | } |
9a1b64ca TI |
483 | substream->ops->close(substream); |
484 | if (substream->runtime->private_free) | |
485 | substream->runtime->private_free(substream); | |
486 | snd_rawmidi_runtime_free(substream); | |
487 | substream->opened = 0; | |
488 | substream->append = 0; | |
7584af10 CL |
489 | put_pid(substream->pid); |
490 | substream->pid = NULL; | |
91d12c48 | 491 | rmidi->streams[substream->stream].substream_opened--; |
9a1b64ca TI |
492 | } |
493 | ||
494 | static void rawmidi_release_priv(struct snd_rawmidi_file *rfile) | |
495 | { | |
496 | struct snd_rawmidi *rmidi; | |
497 | ||
498 | rmidi = rfile->rmidi; | |
499 | mutex_lock(&rmidi->open_mutex); | |
500 | if (rfile->input) { | |
501 | close_substream(rmidi, rfile->input, 1); | |
502 | rfile->input = NULL; | |
503 | } | |
504 | if (rfile->output) { | |
505 | close_substream(rmidi, rfile->output, 1); | |
506 | rfile->output = NULL; | |
507 | } | |
508 | rfile->rmidi = NULL; | |
1a60d4c5 | 509 | mutex_unlock(&rmidi->open_mutex); |
9a1b64ca TI |
510 | wake_up(&rmidi->open_wait); |
511 | } | |
512 | ||
513 | /* called from sound/core/seq/seq_midi.c */ | |
514 | int snd_rawmidi_kernel_release(struct snd_rawmidi_file *rfile) | |
515 | { | |
516 | struct snd_rawmidi *rmidi; | |
517 | ||
518 | if (snd_BUG_ON(!rfile)) | |
519 | return -ENXIO; | |
520 | ||
521 | rmidi = rfile->rmidi; | |
522 | rawmidi_release_priv(rfile); | |
1da177e4 LT |
523 | module_put(rmidi->card->module); |
524 | return 0; | |
525 | } | |
526 | ||
527 | static int snd_rawmidi_release(struct inode *inode, struct file *file) | |
528 | { | |
48c9d417 TI |
529 | struct snd_rawmidi_file *rfile; |
530 | struct snd_rawmidi *rmidi; | |
aa73aec6 | 531 | struct module *module; |
1da177e4 LT |
532 | |
533 | rfile = file->private_data; | |
1da177e4 | 534 | rmidi = rfile->rmidi; |
9a1b64ca | 535 | rawmidi_release_priv(rfile); |
1da177e4 | 536 | kfree(rfile); |
aa73aec6 | 537 | module = rmidi->card->module; |
1da177e4 | 538 | snd_card_file_remove(rmidi->card, file); |
aa73aec6 | 539 | module_put(module); |
9a1b64ca | 540 | return 0; |
1da177e4 LT |
541 | } |
542 | ||
18612048 AB |
543 | static int snd_rawmidi_info(struct snd_rawmidi_substream *substream, |
544 | struct snd_rawmidi_info *info) | |
1da177e4 | 545 | { |
48c9d417 | 546 | struct snd_rawmidi *rmidi; |
1da177e4 LT |
547 | |
548 | if (substream == NULL) | |
549 | return -ENODEV; | |
550 | rmidi = substream->rmidi; | |
551 | memset(info, 0, sizeof(*info)); | |
552 | info->card = rmidi->card->number; | |
553 | info->device = rmidi->device; | |
554 | info->subdevice = substream->number; | |
555 | info->stream = substream->stream; | |
556 | info->flags = rmidi->info_flags; | |
557 | strcpy(info->id, rmidi->id); | |
558 | strcpy(info->name, rmidi->name); | |
559 | strcpy(info->subname, substream->name); | |
560 | info->subdevices_count = substream->pstr->substream_count; | |
561 | info->subdevices_avail = (substream->pstr->substream_count - | |
562 | substream->pstr->substream_opened); | |
563 | return 0; | |
564 | } | |
565 | ||
48c9d417 TI |
566 | static int snd_rawmidi_info_user(struct snd_rawmidi_substream *substream, |
567 | struct snd_rawmidi_info __user * _info) | |
1da177e4 | 568 | { |
48c9d417 | 569 | struct snd_rawmidi_info info; |
1da177e4 LT |
570 | int err; |
571 | if ((err = snd_rawmidi_info(substream, &info)) < 0) | |
572 | return err; | |
48c9d417 | 573 | if (copy_to_user(_info, &info, sizeof(struct snd_rawmidi_info))) |
1da177e4 LT |
574 | return -EFAULT; |
575 | return 0; | |
576 | } | |
577 | ||
48c9d417 | 578 | int snd_rawmidi_info_select(struct snd_card *card, struct snd_rawmidi_info *info) |
1da177e4 | 579 | { |
48c9d417 TI |
580 | struct snd_rawmidi *rmidi; |
581 | struct snd_rawmidi_str *pstr; | |
582 | struct snd_rawmidi_substream *substream; | |
f87135f5 | 583 | |
1a60d4c5 | 584 | mutex_lock(®ister_mutex); |
f87135f5 | 585 | rmidi = snd_rawmidi_search(card, info->device); |
1a60d4c5 | 586 | mutex_unlock(®ister_mutex); |
a106cd3d CL |
587 | if (!rmidi) |
588 | return -ENXIO; | |
1da177e4 LT |
589 | if (info->stream < 0 || info->stream > 1) |
590 | return -EINVAL; | |
591 | pstr = &rmidi->streams[info->stream]; | |
592 | if (pstr->substream_count == 0) | |
593 | return -ENOENT; | |
594 | if (info->subdevice >= pstr->substream_count) | |
595 | return -ENXIO; | |
9244b2c3 | 596 | list_for_each_entry(substream, &pstr->substreams, list) { |
1da177e4 LT |
597 | if ((unsigned int)substream->number == info->subdevice) |
598 | return snd_rawmidi_info(substream, info); | |
599 | } | |
600 | return -ENXIO; | |
601 | } | |
602 | ||
48c9d417 TI |
603 | static int snd_rawmidi_info_select_user(struct snd_card *card, |
604 | struct snd_rawmidi_info __user *_info) | |
1da177e4 LT |
605 | { |
606 | int err; | |
48c9d417 | 607 | struct snd_rawmidi_info info; |
1da177e4 LT |
608 | if (get_user(info.device, &_info->device)) |
609 | return -EFAULT; | |
610 | if (get_user(info.stream, &_info->stream)) | |
611 | return -EFAULT; | |
612 | if (get_user(info.subdevice, &_info->subdevice)) | |
613 | return -EFAULT; | |
614 | if ((err = snd_rawmidi_info_select(card, &info)) < 0) | |
615 | return err; | |
48c9d417 | 616 | if (copy_to_user(_info, &info, sizeof(struct snd_rawmidi_info))) |
1da177e4 LT |
617 | return -EFAULT; |
618 | return 0; | |
619 | } | |
620 | ||
48c9d417 TI |
621 | int snd_rawmidi_output_params(struct snd_rawmidi_substream *substream, |
622 | struct snd_rawmidi_params * params) | |
1da177e4 LT |
623 | { |
624 | char *newbuf; | |
48c9d417 | 625 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
1da177e4 LT |
626 | |
627 | if (substream->append && substream->use_count > 1) | |
628 | return -EBUSY; | |
629 | snd_rawmidi_drain_output(substream); | |
630 | if (params->buffer_size < 32 || params->buffer_size > 1024L * 1024L) { | |
631 | return -EINVAL; | |
632 | } | |
633 | if (params->avail_min < 1 || params->avail_min > params->buffer_size) { | |
634 | return -EINVAL; | |
635 | } | |
636 | if (params->buffer_size != runtime->buffer_size) { | |
3101ba03 TI |
637 | newbuf = krealloc(runtime->buffer, params->buffer_size, |
638 | GFP_KERNEL); | |
4fa95ef6 | 639 | if (!newbuf) |
1da177e4 | 640 | return -ENOMEM; |
1da177e4 LT |
641 | runtime->buffer = newbuf; |
642 | runtime->buffer_size = params->buffer_size; | |
1b98ea47 | 643 | runtime->avail = runtime->buffer_size; |
1da177e4 LT |
644 | } |
645 | runtime->avail_min = params->avail_min; | |
646 | substream->active_sensing = !params->no_active_sensing; | |
647 | return 0; | |
648 | } | |
649 | ||
48c9d417 TI |
650 | int snd_rawmidi_input_params(struct snd_rawmidi_substream *substream, |
651 | struct snd_rawmidi_params * params) | |
1da177e4 LT |
652 | { |
653 | char *newbuf; | |
48c9d417 | 654 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
1da177e4 LT |
655 | |
656 | snd_rawmidi_drain_input(substream); | |
657 | if (params->buffer_size < 32 || params->buffer_size > 1024L * 1024L) { | |
658 | return -EINVAL; | |
659 | } | |
660 | if (params->avail_min < 1 || params->avail_min > params->buffer_size) { | |
661 | return -EINVAL; | |
662 | } | |
663 | if (params->buffer_size != runtime->buffer_size) { | |
3101ba03 TI |
664 | newbuf = krealloc(runtime->buffer, params->buffer_size, |
665 | GFP_KERNEL); | |
4fa95ef6 | 666 | if (!newbuf) |
1da177e4 | 667 | return -ENOMEM; |
1da177e4 LT |
668 | runtime->buffer = newbuf; |
669 | runtime->buffer_size = params->buffer_size; | |
670 | } | |
671 | runtime->avail_min = params->avail_min; | |
672 | return 0; | |
673 | } | |
674 | ||
48c9d417 TI |
675 | static int snd_rawmidi_output_status(struct snd_rawmidi_substream *substream, |
676 | struct snd_rawmidi_status * status) | |
1da177e4 | 677 | { |
48c9d417 | 678 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
1da177e4 LT |
679 | |
680 | memset(status, 0, sizeof(*status)); | |
681 | status->stream = SNDRV_RAWMIDI_STREAM_OUTPUT; | |
682 | spin_lock_irq(&runtime->lock); | |
683 | status->avail = runtime->avail; | |
684 | spin_unlock_irq(&runtime->lock); | |
685 | return 0; | |
686 | } | |
687 | ||
48c9d417 TI |
688 | static int snd_rawmidi_input_status(struct snd_rawmidi_substream *substream, |
689 | struct snd_rawmidi_status * status) | |
1da177e4 | 690 | { |
48c9d417 | 691 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
1da177e4 LT |
692 | |
693 | memset(status, 0, sizeof(*status)); | |
694 | status->stream = SNDRV_RAWMIDI_STREAM_INPUT; | |
695 | spin_lock_irq(&runtime->lock); | |
696 | status->avail = runtime->avail; | |
697 | status->xruns = runtime->xruns; | |
698 | runtime->xruns = 0; | |
699 | spin_unlock_irq(&runtime->lock); | |
700 | return 0; | |
701 | } | |
702 | ||
703 | static long snd_rawmidi_ioctl(struct file *file, unsigned int cmd, unsigned long arg) | |
704 | { | |
48c9d417 | 705 | struct snd_rawmidi_file *rfile; |
1da177e4 LT |
706 | void __user *argp = (void __user *)arg; |
707 | ||
708 | rfile = file->private_data; | |
709 | if (((cmd >> 8) & 0xff) != 'W') | |
710 | return -ENOTTY; | |
711 | switch (cmd) { | |
712 | case SNDRV_RAWMIDI_IOCTL_PVERSION: | |
713 | return put_user(SNDRV_RAWMIDI_VERSION, (int __user *)argp) ? -EFAULT : 0; | |
714 | case SNDRV_RAWMIDI_IOCTL_INFO: | |
715 | { | |
48c9d417 TI |
716 | int stream; |
717 | struct snd_rawmidi_info __user *info = argp; | |
1da177e4 LT |
718 | if (get_user(stream, &info->stream)) |
719 | return -EFAULT; | |
720 | switch (stream) { | |
721 | case SNDRV_RAWMIDI_STREAM_INPUT: | |
722 | return snd_rawmidi_info_user(rfile->input, info); | |
723 | case SNDRV_RAWMIDI_STREAM_OUTPUT: | |
724 | return snd_rawmidi_info_user(rfile->output, info); | |
725 | default: | |
726 | return -EINVAL; | |
727 | } | |
728 | } | |
729 | case SNDRV_RAWMIDI_IOCTL_PARAMS: | |
730 | { | |
48c9d417 TI |
731 | struct snd_rawmidi_params params; |
732 | if (copy_from_user(¶ms, argp, sizeof(struct snd_rawmidi_params))) | |
1da177e4 LT |
733 | return -EFAULT; |
734 | switch (params.stream) { | |
735 | case SNDRV_RAWMIDI_STREAM_OUTPUT: | |
736 | if (rfile->output == NULL) | |
737 | return -EINVAL; | |
738 | return snd_rawmidi_output_params(rfile->output, ¶ms); | |
739 | case SNDRV_RAWMIDI_STREAM_INPUT: | |
740 | if (rfile->input == NULL) | |
741 | return -EINVAL; | |
742 | return snd_rawmidi_input_params(rfile->input, ¶ms); | |
743 | default: | |
744 | return -EINVAL; | |
745 | } | |
746 | } | |
747 | case SNDRV_RAWMIDI_IOCTL_STATUS: | |
748 | { | |
749 | int err = 0; | |
48c9d417 TI |
750 | struct snd_rawmidi_status status; |
751 | if (copy_from_user(&status, argp, sizeof(struct snd_rawmidi_status))) | |
1da177e4 LT |
752 | return -EFAULT; |
753 | switch (status.stream) { | |
754 | case SNDRV_RAWMIDI_STREAM_OUTPUT: | |
755 | if (rfile->output == NULL) | |
756 | return -EINVAL; | |
757 | err = snd_rawmidi_output_status(rfile->output, &status); | |
758 | break; | |
759 | case SNDRV_RAWMIDI_STREAM_INPUT: | |
760 | if (rfile->input == NULL) | |
761 | return -EINVAL; | |
762 | err = snd_rawmidi_input_status(rfile->input, &status); | |
763 | break; | |
764 | default: | |
765 | return -EINVAL; | |
766 | } | |
767 | if (err < 0) | |
768 | return err; | |
48c9d417 | 769 | if (copy_to_user(argp, &status, sizeof(struct snd_rawmidi_status))) |
1da177e4 LT |
770 | return -EFAULT; |
771 | return 0; | |
772 | } | |
773 | case SNDRV_RAWMIDI_IOCTL_DROP: | |
774 | { | |
775 | int val; | |
776 | if (get_user(val, (int __user *) argp)) | |
777 | return -EFAULT; | |
778 | switch (val) { | |
779 | case SNDRV_RAWMIDI_STREAM_OUTPUT: | |
780 | if (rfile->output == NULL) | |
781 | return -EINVAL; | |
782 | return snd_rawmidi_drop_output(rfile->output); | |
783 | default: | |
784 | return -EINVAL; | |
785 | } | |
786 | } | |
787 | case SNDRV_RAWMIDI_IOCTL_DRAIN: | |
788 | { | |
789 | int val; | |
790 | if (get_user(val, (int __user *) argp)) | |
791 | return -EFAULT; | |
792 | switch (val) { | |
793 | case SNDRV_RAWMIDI_STREAM_OUTPUT: | |
794 | if (rfile->output == NULL) | |
795 | return -EINVAL; | |
796 | return snd_rawmidi_drain_output(rfile->output); | |
797 | case SNDRV_RAWMIDI_STREAM_INPUT: | |
798 | if (rfile->input == NULL) | |
799 | return -EINVAL; | |
800 | return snd_rawmidi_drain_input(rfile->input); | |
801 | default: | |
802 | return -EINVAL; | |
803 | } | |
804 | } | |
805 | #ifdef CONFIG_SND_DEBUG | |
806 | default: | |
807 | snd_printk(KERN_WARNING "rawmidi: unknown command = 0x%x\n", cmd); | |
808 | #endif | |
809 | } | |
810 | return -ENOTTY; | |
811 | } | |
812 | ||
48c9d417 TI |
813 | static int snd_rawmidi_control_ioctl(struct snd_card *card, |
814 | struct snd_ctl_file *control, | |
1da177e4 LT |
815 | unsigned int cmd, |
816 | unsigned long arg) | |
817 | { | |
818 | void __user *argp = (void __user *)arg; | |
1da177e4 | 819 | |
1da177e4 LT |
820 | switch (cmd) { |
821 | case SNDRV_CTL_IOCTL_RAWMIDI_NEXT_DEVICE: | |
822 | { | |
823 | int device; | |
824 | ||
825 | if (get_user(device, (int __user *)argp)) | |
826 | return -EFAULT; | |
a7a13d06 DC |
827 | if (device >= SNDRV_RAWMIDI_DEVICES) /* next device is -1 */ |
828 | device = SNDRV_RAWMIDI_DEVICES - 1; | |
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 | * | |
eb7c06e8 | 866 | * Return: The size of read data, or a negative error code on failure. |
1da177e4 | 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) | |
b3c705aa | 922 | schedule_work(&runtime->event_work); |
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; |
264df9ec | 937 | unsigned long appl_ptr; |
1da177e4 | 938 | |
264df9ec | 939 | spin_lock_irqsave(&runtime->lock, flags); |
1da177e4 LT |
940 | while (count > 0 && runtime->avail) { |
941 | count1 = runtime->buffer_size - runtime->appl_ptr; | |
942 | if (count1 > count) | |
943 | count1 = count; | |
1da177e4 LT |
944 | if (count1 > (int)runtime->avail) |
945 | count1 = runtime->avail; | |
264df9ec TI |
946 | |
947 | /* update runtime->appl_ptr before unlocking for userbuf */ | |
948 | appl_ptr = runtime->appl_ptr; | |
949 | runtime->appl_ptr += count1; | |
950 | runtime->appl_ptr %= runtime->buffer_size; | |
951 | runtime->avail -= count1; | |
952 | ||
17596a80 | 953 | if (kernelbuf) |
264df9ec | 954 | memcpy(kernelbuf + result, runtime->buffer + appl_ptr, count1); |
17596a80 | 955 | if (userbuf) { |
1da177e4 | 956 | spin_unlock_irqrestore(&runtime->lock, flags); |
17596a80 | 957 | if (copy_to_user(userbuf + result, |
264df9ec | 958 | runtime->buffer + appl_ptr, count1)) { |
1da177e4 LT |
959 | return result > 0 ? result : -EFAULT; |
960 | } | |
961 | spin_lock_irqsave(&runtime->lock, flags); | |
962 | } | |
1da177e4 LT |
963 | result += count1; |
964 | count -= count1; | |
965 | } | |
264df9ec | 966 | spin_unlock_irqrestore(&runtime->lock, flags); |
1da177e4 LT |
967 | return result; |
968 | } | |
969 | ||
48c9d417 TI |
970 | long snd_rawmidi_kernel_read(struct snd_rawmidi_substream *substream, |
971 | unsigned char *buf, long count) | |
1da177e4 LT |
972 | { |
973 | snd_rawmidi_input_trigger(substream, 1); | |
17596a80 | 974 | return snd_rawmidi_kernel_read1(substream, NULL/*userbuf*/, buf, count); |
1da177e4 LT |
975 | } |
976 | ||
48c9d417 TI |
977 | static ssize_t snd_rawmidi_read(struct file *file, char __user *buf, size_t count, |
978 | loff_t *offset) | |
1da177e4 LT |
979 | { |
980 | long result; | |
981 | int count1; | |
48c9d417 TI |
982 | struct snd_rawmidi_file *rfile; |
983 | struct snd_rawmidi_substream *substream; | |
984 | struct snd_rawmidi_runtime *runtime; | |
1da177e4 LT |
985 | |
986 | rfile = file->private_data; | |
987 | substream = rfile->input; | |
988 | if (substream == NULL) | |
989 | return -EIO; | |
990 | runtime = substream->runtime; | |
991 | snd_rawmidi_input_trigger(substream, 1); | |
992 | result = 0; | |
993 | while (count > 0) { | |
994 | spin_lock_irq(&runtime->lock); | |
995 | while (!snd_rawmidi_ready(substream)) { | |
996 | wait_queue_t wait; | |
997 | if ((file->f_flags & O_NONBLOCK) != 0 || result > 0) { | |
998 | spin_unlock_irq(&runtime->lock); | |
999 | return result > 0 ? result : -EAGAIN; | |
1000 | } | |
1001 | init_waitqueue_entry(&wait, current); | |
1002 | add_wait_queue(&runtime->sleep, &wait); | |
1003 | set_current_state(TASK_INTERRUPTIBLE); | |
1004 | spin_unlock_irq(&runtime->lock); | |
1005 | schedule(); | |
1006 | remove_wait_queue(&runtime->sleep, &wait); | |
0914f796 TI |
1007 | if (rfile->rmidi->card->shutdown) |
1008 | return -ENODEV; | |
1da177e4 LT |
1009 | if (signal_pending(current)) |
1010 | return result > 0 ? result : -ERESTARTSYS; | |
1011 | if (!runtime->avail) | |
1012 | return result > 0 ? result : -EIO; | |
1013 | spin_lock_irq(&runtime->lock); | |
1014 | } | |
1015 | spin_unlock_irq(&runtime->lock); | |
4d23359b | 1016 | count1 = snd_rawmidi_kernel_read1(substream, |
17596a80 MÅš |
1017 | (unsigned char __user *)buf, |
1018 | NULL/*kernelbuf*/, | |
1019 | count); | |
1da177e4 LT |
1020 | if (count1 < 0) |
1021 | return result > 0 ? result : count1; | |
1022 | result += count1; | |
1023 | buf += count1; | |
1024 | count -= count1; | |
1025 | } | |
1026 | return result; | |
1027 | } | |
1028 | ||
1029 | /** | |
1030 | * snd_rawmidi_transmit_empty - check whether the output buffer is empty | |
1031 | * @substream: the rawmidi substream | |
eb7c06e8 YB |
1032 | * |
1033 | * Return: 1 if the internal output buffer is empty, 0 if not. | |
1da177e4 | 1034 | */ |
48c9d417 | 1035 | int snd_rawmidi_transmit_empty(struct snd_rawmidi_substream *substream) |
1da177e4 | 1036 | { |
48c9d417 | 1037 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
1da177e4 LT |
1038 | int result; |
1039 | unsigned long flags; | |
1040 | ||
1041 | if (runtime->buffer == NULL) { | |
1042 | snd_printd("snd_rawmidi_transmit_empty: output is not active!!!\n"); | |
1043 | return 1; | |
1044 | } | |
1045 | spin_lock_irqsave(&runtime->lock, flags); | |
1046 | result = runtime->avail >= runtime->buffer_size; | |
1047 | spin_unlock_irqrestore(&runtime->lock, flags); | |
1048 | return result; | |
1049 | } | |
1050 | ||
1051 | /** | |
1052 | * snd_rawmidi_transmit_peek - copy data from the internal buffer | |
1053 | * @substream: the rawmidi substream | |
1054 | * @buffer: the buffer pointer | |
1055 | * @count: data size to transfer | |
1056 | * | |
1057 | * Copies data from the internal output buffer to the given buffer. | |
1058 | * | |
1059 | * Call this in the interrupt handler when the midi output is ready, | |
1060 | * and call snd_rawmidi_transmit_ack() after the transmission is | |
1061 | * finished. | |
1062 | * | |
eb7c06e8 | 1063 | * Return: The size of copied data, or a negative error code on failure. |
1da177e4 | 1064 | */ |
48c9d417 TI |
1065 | int snd_rawmidi_transmit_peek(struct snd_rawmidi_substream *substream, |
1066 | unsigned char *buffer, int count) | |
1da177e4 LT |
1067 | { |
1068 | unsigned long flags; | |
1069 | int result, count1; | |
48c9d417 | 1070 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
1da177e4 LT |
1071 | |
1072 | if (runtime->buffer == NULL) { | |
1073 | snd_printd("snd_rawmidi_transmit_peek: output is not active!!!\n"); | |
1074 | return -EINVAL; | |
1075 | } | |
1076 | result = 0; | |
1077 | spin_lock_irqsave(&runtime->lock, flags); | |
1078 | if (runtime->avail >= runtime->buffer_size) { | |
1079 | /* warning: lowlevel layer MUST trigger down the hardware */ | |
1080 | goto __skip; | |
1081 | } | |
1082 | if (count == 1) { /* special case, faster code */ | |
1083 | *buffer = runtime->buffer[runtime->hw_ptr]; | |
1084 | result++; | |
1085 | } else { | |
1086 | count1 = runtime->buffer_size - runtime->hw_ptr; | |
1087 | if (count1 > count) | |
1088 | count1 = count; | |
1089 | if (count1 > (int)(runtime->buffer_size - runtime->avail)) | |
1090 | count1 = runtime->buffer_size - runtime->avail; | |
1091 | memcpy(buffer, runtime->buffer + runtime->hw_ptr, count1); | |
1092 | count -= count1; | |
1093 | result += count1; | |
1094 | if (count > 0) { | |
1095 | if (count > (int)(runtime->buffer_size - runtime->avail - count1)) | |
1096 | count = runtime->buffer_size - runtime->avail - count1; | |
1097 | memcpy(buffer + count1, runtime->buffer, count); | |
1098 | result += count; | |
1099 | } | |
1100 | } | |
1101 | __skip: | |
1102 | spin_unlock_irqrestore(&runtime->lock, flags); | |
1103 | return result; | |
1104 | } | |
1105 | ||
1106 | /** | |
1107 | * snd_rawmidi_transmit_ack - acknowledge the transmission | |
1108 | * @substream: the rawmidi substream | |
1109 | * @count: the tranferred count | |
1110 | * | |
1111 | * Advances the hardware pointer for the internal output buffer with | |
1112 | * the given size and updates the condition. | |
1113 | * Call after the transmission is finished. | |
1114 | * | |
eb7c06e8 | 1115 | * Return: The advanced size if successful, or a negative error code on failure. |
1da177e4 | 1116 | */ |
48c9d417 | 1117 | int snd_rawmidi_transmit_ack(struct snd_rawmidi_substream *substream, int count) |
1da177e4 LT |
1118 | { |
1119 | unsigned long flags; | |
48c9d417 | 1120 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
1da177e4 LT |
1121 | |
1122 | if (runtime->buffer == NULL) { | |
1123 | snd_printd("snd_rawmidi_transmit_ack: output is not active!!!\n"); | |
1124 | return -EINVAL; | |
1125 | } | |
1126 | spin_lock_irqsave(&runtime->lock, flags); | |
7eaa943c | 1127 | snd_BUG_ON(runtime->avail + count > runtime->buffer_size); |
1da177e4 LT |
1128 | runtime->hw_ptr += count; |
1129 | runtime->hw_ptr %= runtime->buffer_size; | |
1130 | runtime->avail += count; | |
1131 | substream->bytes += count; | |
1132 | if (count > 0) { | |
1133 | if (runtime->drain || snd_rawmidi_ready(substream)) | |
1134 | wake_up(&runtime->sleep); | |
1135 | } | |
1136 | spin_unlock_irqrestore(&runtime->lock, flags); | |
1137 | return count; | |
1138 | } | |
1139 | ||
1140 | /** | |
1141 | * snd_rawmidi_transmit - copy from the buffer to the device | |
1142 | * @substream: the rawmidi substream | |
df8db936 | 1143 | * @buffer: the buffer pointer |
1da177e4 LT |
1144 | * @count: the data size to transfer |
1145 | * | |
1146 | * Copies data from the buffer to the device and advances the pointer. | |
1147 | * | |
eb7c06e8 | 1148 | * Return: The copied size if successful, or a negative error code on failure. |
1da177e4 | 1149 | */ |
48c9d417 TI |
1150 | int snd_rawmidi_transmit(struct snd_rawmidi_substream *substream, |
1151 | unsigned char *buffer, int count) | |
1da177e4 | 1152 | { |
219df32f TI |
1153 | if (!substream->opened) |
1154 | return -EBADFD; | |
1da177e4 LT |
1155 | count = snd_rawmidi_transmit_peek(substream, buffer, count); |
1156 | if (count < 0) | |
1157 | return count; | |
1158 | return snd_rawmidi_transmit_ack(substream, count); | |
1159 | } | |
1160 | ||
48c9d417 | 1161 | static long snd_rawmidi_kernel_write1(struct snd_rawmidi_substream *substream, |
17596a80 MÅš |
1162 | const unsigned char __user *userbuf, |
1163 | const unsigned char *kernelbuf, | |
1164 | long count) | |
1da177e4 LT |
1165 | { |
1166 | unsigned long flags; | |
1167 | long count1, result; | |
48c9d417 | 1168 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
264df9ec | 1169 | unsigned long appl_ptr; |
1da177e4 | 1170 | |
f6cbda79 | 1171 | if (!kernelbuf && !userbuf) |
7eaa943c TI |
1172 | return -EINVAL; |
1173 | if (snd_BUG_ON(!runtime->buffer)) | |
1174 | return -EINVAL; | |
1da177e4 LT |
1175 | |
1176 | result = 0; | |
1177 | spin_lock_irqsave(&runtime->lock, flags); | |
1178 | if (substream->append) { | |
1179 | if ((long)runtime->avail < count) { | |
1180 | spin_unlock_irqrestore(&runtime->lock, flags); | |
1181 | return -EAGAIN; | |
1182 | } | |
1183 | } | |
1184 | while (count > 0 && runtime->avail > 0) { | |
1185 | count1 = runtime->buffer_size - runtime->appl_ptr; | |
1186 | if (count1 > count) | |
1187 | count1 = count; | |
1188 | if (count1 > (long)runtime->avail) | |
1189 | count1 = runtime->avail; | |
264df9ec TI |
1190 | |
1191 | /* update runtime->appl_ptr before unlocking for userbuf */ | |
1192 | appl_ptr = runtime->appl_ptr; | |
1193 | runtime->appl_ptr += count1; | |
1194 | runtime->appl_ptr %= runtime->buffer_size; | |
1195 | runtime->avail -= count1; | |
1196 | ||
17596a80 | 1197 | if (kernelbuf) |
264df9ec | 1198 | memcpy(runtime->buffer + appl_ptr, |
17596a80 MÅš |
1199 | kernelbuf + result, count1); |
1200 | else if (userbuf) { | |
1da177e4 | 1201 | spin_unlock_irqrestore(&runtime->lock, flags); |
264df9ec | 1202 | if (copy_from_user(runtime->buffer + appl_ptr, |
17596a80 | 1203 | userbuf + result, count1)) { |
1da177e4 LT |
1204 | spin_lock_irqsave(&runtime->lock, flags); |
1205 | result = result > 0 ? result : -EFAULT; | |
1206 | goto __end; | |
1207 | } | |
1208 | spin_lock_irqsave(&runtime->lock, flags); | |
1209 | } | |
1da177e4 | 1210 | result += count1; |
1da177e4 LT |
1211 | count -= count1; |
1212 | } | |
1213 | __end: | |
1214 | count1 = runtime->avail < runtime->buffer_size; | |
1215 | spin_unlock_irqrestore(&runtime->lock, flags); | |
1216 | if (count1) | |
1217 | snd_rawmidi_output_trigger(substream, 1); | |
1218 | return result; | |
1219 | } | |
1220 | ||
48c9d417 TI |
1221 | long snd_rawmidi_kernel_write(struct snd_rawmidi_substream *substream, |
1222 | const unsigned char *buf, long count) | |
1da177e4 | 1223 | { |
17596a80 | 1224 | return snd_rawmidi_kernel_write1(substream, NULL, buf, count); |
1da177e4 LT |
1225 | } |
1226 | ||
48c9d417 TI |
1227 | static ssize_t snd_rawmidi_write(struct file *file, const char __user *buf, |
1228 | size_t count, loff_t *offset) | |
1da177e4 LT |
1229 | { |
1230 | long result, timeout; | |
1231 | int count1; | |
48c9d417 TI |
1232 | struct snd_rawmidi_file *rfile; |
1233 | struct snd_rawmidi_runtime *runtime; | |
1234 | struct snd_rawmidi_substream *substream; | |
1da177e4 LT |
1235 | |
1236 | rfile = file->private_data; | |
1237 | substream = rfile->output; | |
1238 | runtime = substream->runtime; | |
1239 | /* we cannot put an atomic message to our buffer */ | |
1240 | if (substream->append && count > runtime->buffer_size) | |
1241 | return -EIO; | |
1242 | result = 0; | |
1243 | while (count > 0) { | |
1244 | spin_lock_irq(&runtime->lock); | |
1245 | while (!snd_rawmidi_ready_append(substream, count)) { | |
1246 | wait_queue_t wait; | |
1247 | if (file->f_flags & O_NONBLOCK) { | |
1248 | spin_unlock_irq(&runtime->lock); | |
1249 | return result > 0 ? result : -EAGAIN; | |
1250 | } | |
1251 | init_waitqueue_entry(&wait, current); | |
1252 | add_wait_queue(&runtime->sleep, &wait); | |
1253 | set_current_state(TASK_INTERRUPTIBLE); | |
1254 | spin_unlock_irq(&runtime->lock); | |
1255 | timeout = schedule_timeout(30 * HZ); | |
1256 | remove_wait_queue(&runtime->sleep, &wait); | |
0914f796 TI |
1257 | if (rfile->rmidi->card->shutdown) |
1258 | return -ENODEV; | |
1da177e4 LT |
1259 | if (signal_pending(current)) |
1260 | return result > 0 ? result : -ERESTARTSYS; | |
1261 | if (!runtime->avail && !timeout) | |
1262 | return result > 0 ? result : -EIO; | |
1263 | spin_lock_irq(&runtime->lock); | |
1264 | } | |
1265 | spin_unlock_irq(&runtime->lock); | |
17596a80 | 1266 | count1 = snd_rawmidi_kernel_write1(substream, buf, NULL, count); |
1da177e4 LT |
1267 | if (count1 < 0) |
1268 | return result > 0 ? result : count1; | |
1269 | result += count1; | |
1270 | buf += count1; | |
1271 | if ((size_t)count1 < count && (file->f_flags & O_NONBLOCK)) | |
1272 | break; | |
1273 | count -= count1; | |
1274 | } | |
6b2f3d1f | 1275 | if (file->f_flags & O_DSYNC) { |
1da177e4 LT |
1276 | spin_lock_irq(&runtime->lock); |
1277 | while (runtime->avail != runtime->buffer_size) { | |
1278 | wait_queue_t wait; | |
1279 | unsigned int last_avail = runtime->avail; | |
1280 | init_waitqueue_entry(&wait, current); | |
1281 | add_wait_queue(&runtime->sleep, &wait); | |
1282 | set_current_state(TASK_INTERRUPTIBLE); | |
1283 | spin_unlock_irq(&runtime->lock); | |
1284 | timeout = schedule_timeout(30 * HZ); | |
1285 | remove_wait_queue(&runtime->sleep, &wait); | |
1286 | if (signal_pending(current)) | |
1287 | return result > 0 ? result : -ERESTARTSYS; | |
1288 | if (runtime->avail == last_avail && !timeout) | |
1289 | return result > 0 ? result : -EIO; | |
1290 | spin_lock_irq(&runtime->lock); | |
1291 | } | |
1292 | spin_unlock_irq(&runtime->lock); | |
1293 | } | |
1294 | return result; | |
1295 | } | |
1296 | ||
1297 | static unsigned int snd_rawmidi_poll(struct file *file, poll_table * wait) | |
1298 | { | |
48c9d417 TI |
1299 | struct snd_rawmidi_file *rfile; |
1300 | struct snd_rawmidi_runtime *runtime; | |
1da177e4 LT |
1301 | unsigned int mask; |
1302 | ||
1303 | rfile = file->private_data; | |
1304 | if (rfile->input != NULL) { | |
1305 | runtime = rfile->input->runtime; | |
1306 | snd_rawmidi_input_trigger(rfile->input, 1); | |
1307 | poll_wait(file, &runtime->sleep, wait); | |
1308 | } | |
1309 | if (rfile->output != NULL) { | |
1310 | runtime = rfile->output->runtime; | |
1311 | poll_wait(file, &runtime->sleep, wait); | |
1312 | } | |
1313 | mask = 0; | |
1314 | if (rfile->input != NULL) { | |
1315 | if (snd_rawmidi_ready(rfile->input)) | |
1316 | mask |= POLLIN | POLLRDNORM; | |
1317 | } | |
1318 | if (rfile->output != NULL) { | |
1319 | if (snd_rawmidi_ready(rfile->output)) | |
1320 | mask |= POLLOUT | POLLWRNORM; | |
1321 | } | |
1322 | return mask; | |
1323 | } | |
1324 | ||
1325 | /* | |
1326 | */ | |
1327 | #ifdef CONFIG_COMPAT | |
1328 | #include "rawmidi_compat.c" | |
1329 | #else | |
1330 | #define snd_rawmidi_ioctl_compat NULL | |
1331 | #endif | |
1332 | ||
1333 | /* | |
1334 | ||
1335 | */ | |
1336 | ||
48c9d417 TI |
1337 | static void snd_rawmidi_proc_info_read(struct snd_info_entry *entry, |
1338 | struct snd_info_buffer *buffer) | |
1da177e4 | 1339 | { |
48c9d417 TI |
1340 | struct snd_rawmidi *rmidi; |
1341 | struct snd_rawmidi_substream *substream; | |
1342 | struct snd_rawmidi_runtime *runtime; | |
1da177e4 LT |
1343 | |
1344 | rmidi = entry->private_data; | |
1345 | snd_iprintf(buffer, "%s\n\n", rmidi->name); | |
1a60d4c5 | 1346 | mutex_lock(&rmidi->open_mutex); |
1da177e4 | 1347 | if (rmidi->info_flags & SNDRV_RAWMIDI_INFO_OUTPUT) { |
9244b2c3 JB |
1348 | list_for_each_entry(substream, |
1349 | &rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substreams, | |
1350 | list) { | |
1da177e4 LT |
1351 | snd_iprintf(buffer, |
1352 | "Output %d\n" | |
1353 | " Tx bytes : %lu\n", | |
1354 | substream->number, | |
1355 | (unsigned long) substream->bytes); | |
1356 | if (substream->opened) { | |
7584af10 CL |
1357 | snd_iprintf(buffer, |
1358 | " Owner PID : %d\n", | |
1359 | pid_vnr(substream->pid)); | |
1da177e4 LT |
1360 | runtime = substream->runtime; |
1361 | snd_iprintf(buffer, | |
1362 | " Mode : %s\n" | |
1363 | " Buffer size : %lu\n" | |
1364 | " Avail : %lu\n", | |
1365 | runtime->oss ? "OSS compatible" : "native", | |
1366 | (unsigned long) runtime->buffer_size, | |
1367 | (unsigned long) runtime->avail); | |
1368 | } | |
1369 | } | |
1370 | } | |
1371 | if (rmidi->info_flags & SNDRV_RAWMIDI_INFO_INPUT) { | |
9244b2c3 JB |
1372 | list_for_each_entry(substream, |
1373 | &rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substreams, | |
1374 | list) { | |
1da177e4 LT |
1375 | snd_iprintf(buffer, |
1376 | "Input %d\n" | |
1377 | " Rx bytes : %lu\n", | |
1378 | substream->number, | |
1379 | (unsigned long) substream->bytes); | |
1380 | if (substream->opened) { | |
7584af10 CL |
1381 | snd_iprintf(buffer, |
1382 | " Owner PID : %d\n", | |
1383 | pid_vnr(substream->pid)); | |
1da177e4 LT |
1384 | runtime = substream->runtime; |
1385 | snd_iprintf(buffer, | |
1386 | " Buffer size : %lu\n" | |
1387 | " Avail : %lu\n" | |
1388 | " Overruns : %lu\n", | |
1389 | (unsigned long) runtime->buffer_size, | |
1390 | (unsigned long) runtime->avail, | |
1391 | (unsigned long) runtime->xruns); | |
1392 | } | |
1393 | } | |
1394 | } | |
1a60d4c5 | 1395 | mutex_unlock(&rmidi->open_mutex); |
1da177e4 LT |
1396 | } |
1397 | ||
1398 | /* | |
1399 | * Register functions | |
1400 | */ | |
1401 | ||
9c2e08c5 | 1402 | static const struct file_operations snd_rawmidi_f_ops = |
1da177e4 LT |
1403 | { |
1404 | .owner = THIS_MODULE, | |
1405 | .read = snd_rawmidi_read, | |
1406 | .write = snd_rawmidi_write, | |
1407 | .open = snd_rawmidi_open, | |
1408 | .release = snd_rawmidi_release, | |
02f4865f | 1409 | .llseek = no_llseek, |
1da177e4 LT |
1410 | .poll = snd_rawmidi_poll, |
1411 | .unlocked_ioctl = snd_rawmidi_ioctl, | |
1412 | .compat_ioctl = snd_rawmidi_ioctl_compat, | |
1413 | }; | |
1414 | ||
48c9d417 TI |
1415 | static int snd_rawmidi_alloc_substreams(struct snd_rawmidi *rmidi, |
1416 | struct snd_rawmidi_str *stream, | |
1da177e4 LT |
1417 | int direction, |
1418 | int count) | |
1419 | { | |
48c9d417 | 1420 | struct snd_rawmidi_substream *substream; |
1da177e4 LT |
1421 | int idx; |
1422 | ||
1da177e4 | 1423 | for (idx = 0; idx < count; idx++) { |
ca2c0966 | 1424 | substream = kzalloc(sizeof(*substream), GFP_KERNEL); |
73e77ba0 TI |
1425 | if (substream == NULL) { |
1426 | snd_printk(KERN_ERR "rawmidi: cannot allocate substream\n"); | |
1da177e4 | 1427 | return -ENOMEM; |
73e77ba0 | 1428 | } |
1da177e4 LT |
1429 | substream->stream = direction; |
1430 | substream->number = idx; | |
1431 | substream->rmidi = rmidi; | |
1432 | substream->pstr = stream; | |
1433 | list_add_tail(&substream->list, &stream->substreams); | |
1434 | stream->substream_count++; | |
1435 | } | |
1436 | return 0; | |
1437 | } | |
1438 | ||
1439 | /** | |
1440 | * snd_rawmidi_new - create a rawmidi instance | |
1441 | * @card: the card instance | |
1442 | * @id: the id string | |
1443 | * @device: the device index | |
1444 | * @output_count: the number of output streams | |
1445 | * @input_count: the number of input streams | |
1446 | * @rrawmidi: the pointer to store the new rawmidi instance | |
1447 | * | |
1448 | * Creates a new rawmidi instance. | |
1449 | * Use snd_rawmidi_set_ops() to set the operators to the new instance. | |
1450 | * | |
eb7c06e8 | 1451 | * Return: Zero if successful, or a negative error code on failure. |
1da177e4 | 1452 | */ |
48c9d417 | 1453 | int snd_rawmidi_new(struct snd_card *card, char *id, int device, |
1da177e4 | 1454 | int output_count, int input_count, |
48c9d417 | 1455 | struct snd_rawmidi ** rrawmidi) |
1da177e4 | 1456 | { |
48c9d417 | 1457 | struct snd_rawmidi *rmidi; |
1da177e4 | 1458 | int err; |
48c9d417 | 1459 | static struct snd_device_ops ops = { |
1da177e4 LT |
1460 | .dev_free = snd_rawmidi_dev_free, |
1461 | .dev_register = snd_rawmidi_dev_register, | |
1462 | .dev_disconnect = snd_rawmidi_dev_disconnect, | |
1da177e4 LT |
1463 | }; |
1464 | ||
7eaa943c TI |
1465 | if (snd_BUG_ON(!card)) |
1466 | return -ENXIO; | |
1467 | if (rrawmidi) | |
1468 | *rrawmidi = NULL; | |
ca2c0966 | 1469 | rmidi = kzalloc(sizeof(*rmidi), GFP_KERNEL); |
73e77ba0 TI |
1470 | if (rmidi == NULL) { |
1471 | snd_printk(KERN_ERR "rawmidi: cannot allocate\n"); | |
1da177e4 | 1472 | return -ENOMEM; |
73e77ba0 | 1473 | } |
1da177e4 LT |
1474 | rmidi->card = card; |
1475 | rmidi->device = device; | |
1a60d4c5 | 1476 | mutex_init(&rmidi->open_mutex); |
1da177e4 | 1477 | init_waitqueue_head(&rmidi->open_wait); |
c13893d7 AM |
1478 | INIT_LIST_HEAD(&rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substreams); |
1479 | INIT_LIST_HEAD(&rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substreams); | |
1480 | ||
1da177e4 LT |
1481 | if (id != NULL) |
1482 | strlcpy(rmidi->id, id, sizeof(rmidi->id)); | |
73e77ba0 TI |
1483 | if ((err = snd_rawmidi_alloc_substreams(rmidi, |
1484 | &rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT], | |
1485 | SNDRV_RAWMIDI_STREAM_INPUT, | |
1486 | input_count)) < 0) { | |
1da177e4 LT |
1487 | snd_rawmidi_free(rmidi); |
1488 | return err; | |
1489 | } | |
73e77ba0 TI |
1490 | if ((err = snd_rawmidi_alloc_substreams(rmidi, |
1491 | &rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT], | |
1492 | SNDRV_RAWMIDI_STREAM_OUTPUT, | |
1493 | output_count)) < 0) { | |
1da177e4 LT |
1494 | snd_rawmidi_free(rmidi); |
1495 | return err; | |
1496 | } | |
1497 | if ((err = snd_device_new(card, SNDRV_DEV_RAWMIDI, rmidi, &ops)) < 0) { | |
1498 | snd_rawmidi_free(rmidi); | |
1499 | return err; | |
1500 | } | |
7eaa943c TI |
1501 | if (rrawmidi) |
1502 | *rrawmidi = rmidi; | |
1da177e4 LT |
1503 | return 0; |
1504 | } | |
1505 | ||
48c9d417 | 1506 | static void snd_rawmidi_free_substreams(struct snd_rawmidi_str *stream) |
1da177e4 | 1507 | { |
48c9d417 | 1508 | struct snd_rawmidi_substream *substream; |
1da177e4 LT |
1509 | |
1510 | while (!list_empty(&stream->substreams)) { | |
48c9d417 | 1511 | substream = list_entry(stream->substreams.next, struct snd_rawmidi_substream, list); |
1da177e4 LT |
1512 | list_del(&substream->list); |
1513 | kfree(substream); | |
1514 | } | |
1515 | } | |
1516 | ||
48c9d417 | 1517 | static int snd_rawmidi_free(struct snd_rawmidi *rmidi) |
1da177e4 | 1518 | { |
7eaa943c TI |
1519 | if (!rmidi) |
1520 | return 0; | |
c461482c TI |
1521 | |
1522 | snd_info_free_entry(rmidi->proc_entry); | |
1523 | rmidi->proc_entry = NULL; | |
1524 | mutex_lock(®ister_mutex); | |
1525 | if (rmidi->ops && rmidi->ops->dev_unregister) | |
1526 | rmidi->ops->dev_unregister(rmidi); | |
1527 | mutex_unlock(®ister_mutex); | |
1528 | ||
1da177e4 LT |
1529 | snd_rawmidi_free_substreams(&rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT]); |
1530 | snd_rawmidi_free_substreams(&rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT]); | |
1531 | if (rmidi->private_free) | |
1532 | rmidi->private_free(rmidi); | |
1533 | kfree(rmidi); | |
1534 | return 0; | |
1535 | } | |
1536 | ||
48c9d417 | 1537 | static int snd_rawmidi_dev_free(struct snd_device *device) |
1da177e4 | 1538 | { |
48c9d417 | 1539 | struct snd_rawmidi *rmidi = device->device_data; |
1da177e4 LT |
1540 | return snd_rawmidi_free(rmidi); |
1541 | } | |
1542 | ||
1543 | #if defined(CONFIG_SND_SEQUENCER) || (defined(MODULE) && defined(CONFIG_SND_SEQUENCER_MODULE)) | |
48c9d417 | 1544 | static void snd_rawmidi_dev_seq_free(struct snd_seq_device *device) |
1da177e4 | 1545 | { |
48c9d417 | 1546 | struct snd_rawmidi *rmidi = device->private_data; |
1da177e4 LT |
1547 | rmidi->seq_dev = NULL; |
1548 | } | |
1549 | #endif | |
1550 | ||
48c9d417 | 1551 | static int snd_rawmidi_dev_register(struct snd_device *device) |
1da177e4 | 1552 | { |
f87135f5 | 1553 | int err; |
48c9d417 | 1554 | struct snd_info_entry *entry; |
1da177e4 | 1555 | char name[16]; |
48c9d417 | 1556 | struct snd_rawmidi *rmidi = device->device_data; |
1da177e4 LT |
1557 | |
1558 | if (rmidi->device >= SNDRV_RAWMIDI_DEVICES) | |
1559 | return -ENOMEM; | |
1a60d4c5 | 1560 | mutex_lock(®ister_mutex); |
f87135f5 | 1561 | if (snd_rawmidi_search(rmidi->card, rmidi->device)) { |
1a60d4c5 | 1562 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
1563 | return -EBUSY; |
1564 | } | |
f87135f5 | 1565 | list_add_tail(&rmidi->list, &snd_rawmidi_devices); |
1da177e4 | 1566 | sprintf(name, "midiC%iD%i", rmidi->card->number, rmidi->device); |
c5bbf9a1 | 1567 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
1568 | if ((err = snd_register_device(SNDRV_DEVICE_TYPE_RAWMIDI, |
1569 | rmidi->card, rmidi->device, | |
f87135f5 | 1570 | &snd_rawmidi_f_ops, rmidi, name)) < 0) { |
1da177e4 | 1571 | snd_printk(KERN_ERR "unable to register rawmidi device %i:%i\n", rmidi->card->number, rmidi->device); |
c5bbf9a1 | 1572 | mutex_lock(®ister_mutex); |
f87135f5 | 1573 | list_del(&rmidi->list); |
1a60d4c5 | 1574 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
1575 | return err; |
1576 | } | |
1577 | if (rmidi->ops && rmidi->ops->dev_register && | |
1578 | (err = rmidi->ops->dev_register(rmidi)) < 0) { | |
1579 | snd_unregister_device(SNDRV_DEVICE_TYPE_RAWMIDI, rmidi->card, rmidi->device); | |
c5bbf9a1 | 1580 | mutex_lock(®ister_mutex); |
f87135f5 | 1581 | list_del(&rmidi->list); |
1a60d4c5 | 1582 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
1583 | return err; |
1584 | } | |
1585 | #ifdef CONFIG_SND_OSSEMUL | |
1586 | rmidi->ossreg = 0; | |
1587 | if ((int)rmidi->device == midi_map[rmidi->card->number]) { | |
1588 | if (snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_MIDI, | |
f87135f5 CL |
1589 | rmidi->card, 0, &snd_rawmidi_f_ops, |
1590 | rmidi, name) < 0) { | |
1da177e4 LT |
1591 | snd_printk(KERN_ERR "unable to register OSS rawmidi device %i:%i\n", rmidi->card->number, 0); |
1592 | } else { | |
1593 | rmidi->ossreg++; | |
1594 | #ifdef SNDRV_OSS_INFO_DEV_MIDI | |
1595 | snd_oss_info_register(SNDRV_OSS_INFO_DEV_MIDI, rmidi->card->number, rmidi->name); | |
1596 | #endif | |
1597 | } | |
1598 | } | |
1599 | if ((int)rmidi->device == amidi_map[rmidi->card->number]) { | |
1600 | if (snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_MIDI, | |
f87135f5 CL |
1601 | rmidi->card, 1, &snd_rawmidi_f_ops, |
1602 | rmidi, name) < 0) { | |
1da177e4 LT |
1603 | snd_printk(KERN_ERR "unable to register OSS rawmidi device %i:%i\n", rmidi->card->number, 1); |
1604 | } else { | |
1605 | rmidi->ossreg++; | |
1606 | } | |
1607 | } | |
1608 | #endif /* CONFIG_SND_OSSEMUL */ | |
1da177e4 LT |
1609 | sprintf(name, "midi%d", rmidi->device); |
1610 | entry = snd_info_create_card_entry(rmidi->card, name, rmidi->card->proc_root); | |
1611 | if (entry) { | |
1612 | entry->private_data = rmidi; | |
1da177e4 LT |
1613 | entry->c.text.read = snd_rawmidi_proc_info_read; |
1614 | if (snd_info_register(entry) < 0) { | |
1615 | snd_info_free_entry(entry); | |
1616 | entry = NULL; | |
1617 | } | |
1618 | } | |
1619 | rmidi->proc_entry = entry; | |
1620 | #if defined(CONFIG_SND_SEQUENCER) || (defined(MODULE) && defined(CONFIG_SND_SEQUENCER_MODULE)) | |
1621 | if (!rmidi->ops || !rmidi->ops->dev_register) { /* own registration mechanism */ | |
1622 | if (snd_seq_device_new(rmidi->card, rmidi->device, SNDRV_SEQ_DEV_ID_MIDISYNTH, 0, &rmidi->seq_dev) >= 0) { | |
1623 | rmidi->seq_dev->private_data = rmidi; | |
1624 | rmidi->seq_dev->private_free = snd_rawmidi_dev_seq_free; | |
1625 | sprintf(rmidi->seq_dev->name, "MIDI %d-%d", rmidi->card->number, rmidi->device); | |
1626 | snd_device_register(rmidi->card, rmidi->seq_dev); | |
1627 | } | |
1628 | } | |
1629 | #endif | |
1630 | return 0; | |
1631 | } | |
1632 | ||
48c9d417 | 1633 | static int snd_rawmidi_dev_disconnect(struct snd_device *device) |
1da177e4 | 1634 | { |
48c9d417 | 1635 | struct snd_rawmidi *rmidi = device->device_data; |
0914f796 | 1636 | int dir; |
1da177e4 | 1637 | |
1a60d4c5 | 1638 | mutex_lock(®ister_mutex); |
0914f796 TI |
1639 | mutex_lock(&rmidi->open_mutex); |
1640 | wake_up(&rmidi->open_wait); | |
f87135f5 | 1641 | list_del_init(&rmidi->list); |
0914f796 TI |
1642 | for (dir = 0; dir < 2; dir++) { |
1643 | struct snd_rawmidi_substream *s; | |
1644 | list_for_each_entry(s, &rmidi->streams[dir].substreams, list) { | |
1645 | if (s->runtime) | |
1646 | wake_up(&s->runtime->sleep); | |
1647 | } | |
1648 | } | |
1649 | ||
1da177e4 LT |
1650 | #ifdef CONFIG_SND_OSSEMUL |
1651 | if (rmidi->ossreg) { | |
1652 | if ((int)rmidi->device == midi_map[rmidi->card->number]) { | |
1653 | snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_MIDI, rmidi->card, 0); | |
1654 | #ifdef SNDRV_OSS_INFO_DEV_MIDI | |
1655 | snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_MIDI, rmidi->card->number); | |
1656 | #endif | |
1657 | } | |
1658 | if ((int)rmidi->device == amidi_map[rmidi->card->number]) | |
1659 | snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_MIDI, rmidi->card, 1); | |
1660 | rmidi->ossreg = 0; | |
1661 | } | |
1662 | #endif /* CONFIG_SND_OSSEMUL */ | |
1da177e4 | 1663 | snd_unregister_device(SNDRV_DEVICE_TYPE_RAWMIDI, rmidi->card, rmidi->device); |
0914f796 | 1664 | mutex_unlock(&rmidi->open_mutex); |
1a60d4c5 | 1665 | mutex_unlock(®ister_mutex); |
c461482c | 1666 | return 0; |
1da177e4 LT |
1667 | } |
1668 | ||
1669 | /** | |
1670 | * snd_rawmidi_set_ops - set the rawmidi operators | |
1671 | * @rmidi: the rawmidi instance | |
1672 | * @stream: the stream direction, SNDRV_RAWMIDI_STREAM_XXX | |
1673 | * @ops: the operator table | |
1674 | * | |
1675 | * Sets the rawmidi operators for the given stream direction. | |
1676 | */ | |
48c9d417 TI |
1677 | void snd_rawmidi_set_ops(struct snd_rawmidi *rmidi, int stream, |
1678 | struct snd_rawmidi_ops *ops) | |
1da177e4 | 1679 | { |
48c9d417 | 1680 | struct snd_rawmidi_substream *substream; |
1da177e4 | 1681 | |
9244b2c3 | 1682 | list_for_each_entry(substream, &rmidi->streams[stream].substreams, list) |
1da177e4 | 1683 | substream->ops = ops; |
1da177e4 LT |
1684 | } |
1685 | ||
1686 | /* | |
1687 | * ENTRY functions | |
1688 | */ | |
1689 | ||
1690 | static int __init alsa_rawmidi_init(void) | |
1691 | { | |
1692 | ||
1693 | snd_ctl_register_ioctl(snd_rawmidi_control_ioctl); | |
1694 | snd_ctl_register_ioctl_compat(snd_rawmidi_control_ioctl); | |
1695 | #ifdef CONFIG_SND_OSSEMUL | |
1696 | { int i; | |
1697 | /* check device map table */ | |
1698 | for (i = 0; i < SNDRV_CARDS; i++) { | |
1699 | if (midi_map[i] < 0 || midi_map[i] >= SNDRV_RAWMIDI_DEVICES) { | |
1700 | snd_printk(KERN_ERR "invalid midi_map[%d] = %d\n", i, midi_map[i]); | |
1701 | midi_map[i] = 0; | |
1702 | } | |
1703 | if (amidi_map[i] < 0 || amidi_map[i] >= SNDRV_RAWMIDI_DEVICES) { | |
1704 | snd_printk(KERN_ERR "invalid amidi_map[%d] = %d\n", i, amidi_map[i]); | |
1705 | amidi_map[i] = 1; | |
1706 | } | |
1707 | } | |
1708 | } | |
1709 | #endif /* CONFIG_SND_OSSEMUL */ | |
1710 | return 0; | |
1711 | } | |
1712 | ||
1713 | static void __exit alsa_rawmidi_exit(void) | |
1714 | { | |
1715 | snd_ctl_unregister_ioctl(snd_rawmidi_control_ioctl); | |
1716 | snd_ctl_unregister_ioctl_compat(snd_rawmidi_control_ioctl); | |
1717 | } | |
1718 | ||
1719 | module_init(alsa_rawmidi_init) | |
1720 | module_exit(alsa_rawmidi_exit) | |
1721 | ||
1722 | EXPORT_SYMBOL(snd_rawmidi_output_params); | |
1723 | EXPORT_SYMBOL(snd_rawmidi_input_params); | |
1724 | EXPORT_SYMBOL(snd_rawmidi_drop_output); | |
1725 | EXPORT_SYMBOL(snd_rawmidi_drain_output); | |
1726 | EXPORT_SYMBOL(snd_rawmidi_drain_input); | |
1727 | EXPORT_SYMBOL(snd_rawmidi_receive); | |
1728 | EXPORT_SYMBOL(snd_rawmidi_transmit_empty); | |
1729 | EXPORT_SYMBOL(snd_rawmidi_transmit_peek); | |
1730 | EXPORT_SYMBOL(snd_rawmidi_transmit_ack); | |
1731 | EXPORT_SYMBOL(snd_rawmidi_transmit); | |
1732 | EXPORT_SYMBOL(snd_rawmidi_new); | |
1733 | EXPORT_SYMBOL(snd_rawmidi_set_ops); | |
1da177e4 LT |
1734 | EXPORT_SYMBOL(snd_rawmidi_info_select); |
1735 | EXPORT_SYMBOL(snd_rawmidi_kernel_open); | |
1736 | EXPORT_SYMBOL(snd_rawmidi_kernel_release); | |
1737 | EXPORT_SYMBOL(snd_rawmidi_kernel_read); | |
1738 | EXPORT_SYMBOL(snd_rawmidi_kernel_write); |