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 | |
ca20d292 | 59 | #define rmidi_err(rmidi, fmt, args...) \ |
07cc3e8b | 60 | dev_err(&(rmidi)->dev, fmt, ##args) |
ca20d292 | 61 | #define rmidi_warn(rmidi, fmt, args...) \ |
07cc3e8b | 62 | dev_warn(&(rmidi)->dev, fmt, ##args) |
ca20d292 | 63 | #define rmidi_dbg(rmidi, fmt, args...) \ |
07cc3e8b | 64 | dev_dbg(&(rmidi)->dev, fmt, ##args) |
ca20d292 | 65 | |
f87135f5 CL |
66 | static struct snd_rawmidi *snd_rawmidi_search(struct snd_card *card, int device) |
67 | { | |
f87135f5 CL |
68 | struct snd_rawmidi *rawmidi; |
69 | ||
9244b2c3 | 70 | list_for_each_entry(rawmidi, &snd_rawmidi_devices, list) |
f87135f5 CL |
71 | if (rawmidi->card == card && rawmidi->device == device) |
72 | return rawmidi; | |
f87135f5 CL |
73 | return NULL; |
74 | } | |
75 | ||
1da177e4 LT |
76 | static inline unsigned short snd_rawmidi_file_flags(struct file *file) |
77 | { | |
78 | switch (file->f_mode & (FMODE_READ | FMODE_WRITE)) { | |
79 | case FMODE_WRITE: | |
80 | return SNDRV_RAWMIDI_LFLG_OUTPUT; | |
81 | case FMODE_READ: | |
82 | return SNDRV_RAWMIDI_LFLG_INPUT; | |
83 | default: | |
84 | return SNDRV_RAWMIDI_LFLG_OPEN; | |
85 | } | |
86 | } | |
87 | ||
48c9d417 | 88 | static inline int snd_rawmidi_ready(struct snd_rawmidi_substream *substream) |
1da177e4 | 89 | { |
48c9d417 | 90 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
1da177e4 LT |
91 | return runtime->avail >= runtime->avail_min; |
92 | } | |
93 | ||
48c9d417 TI |
94 | static inline int snd_rawmidi_ready_append(struct snd_rawmidi_substream *substream, |
95 | size_t count) | |
1da177e4 | 96 | { |
48c9d417 | 97 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
1da177e4 LT |
98 | return runtime->avail >= runtime->avail_min && |
99 | (!substream->append || runtime->avail >= count); | |
100 | } | |
101 | ||
b3c705aa | 102 | static void snd_rawmidi_input_event_work(struct work_struct *work) |
1da177e4 | 103 | { |
b3c705aa TI |
104 | struct snd_rawmidi_runtime *runtime = |
105 | container_of(work, struct snd_rawmidi_runtime, event_work); | |
106 | if (runtime->event) | |
107 | runtime->event(runtime->substream); | |
1da177e4 LT |
108 | } |
109 | ||
48c9d417 | 110 | static int snd_rawmidi_runtime_create(struct snd_rawmidi_substream *substream) |
1da177e4 | 111 | { |
48c9d417 | 112 | struct snd_rawmidi_runtime *runtime; |
1da177e4 | 113 | |
ca2c0966 | 114 | if ((runtime = kzalloc(sizeof(*runtime), GFP_KERNEL)) == NULL) |
1da177e4 | 115 | return -ENOMEM; |
b3c705aa | 116 | runtime->substream = substream; |
1da177e4 LT |
117 | spin_lock_init(&runtime->lock); |
118 | init_waitqueue_head(&runtime->sleep); | |
b3c705aa | 119 | INIT_WORK(&runtime->event_work, snd_rawmidi_input_event_work); |
1da177e4 LT |
120 | runtime->event = NULL; |
121 | runtime->buffer_size = PAGE_SIZE; | |
122 | runtime->avail_min = 1; | |
123 | if (substream->stream == SNDRV_RAWMIDI_STREAM_INPUT) | |
124 | runtime->avail = 0; | |
125 | else | |
126 | runtime->avail = runtime->buffer_size; | |
127 | if ((runtime->buffer = kmalloc(runtime->buffer_size, GFP_KERNEL)) == NULL) { | |
128 | kfree(runtime); | |
129 | return -ENOMEM; | |
130 | } | |
131 | runtime->appl_ptr = runtime->hw_ptr = 0; | |
132 | substream->runtime = runtime; | |
133 | return 0; | |
134 | } | |
135 | ||
48c9d417 | 136 | static int snd_rawmidi_runtime_free(struct snd_rawmidi_substream *substream) |
1da177e4 | 137 | { |
48c9d417 | 138 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
1da177e4 LT |
139 | |
140 | kfree(runtime->buffer); | |
141 | kfree(runtime); | |
142 | substream->runtime = NULL; | |
143 | return 0; | |
144 | } | |
145 | ||
48c9d417 | 146 | static inline void snd_rawmidi_output_trigger(struct snd_rawmidi_substream *substream,int up) |
1da177e4 | 147 | { |
219df32f TI |
148 | if (!substream->opened) |
149 | return; | |
b3c705aa | 150 | substream->ops->trigger(substream, up); |
1da177e4 LT |
151 | } |
152 | ||
48c9d417 | 153 | static void snd_rawmidi_input_trigger(struct snd_rawmidi_substream *substream, int up) |
1da177e4 | 154 | { |
219df32f TI |
155 | if (!substream->opened) |
156 | return; | |
1da177e4 | 157 | substream->ops->trigger(substream, up); |
b3c705aa TI |
158 | if (!up) |
159 | cancel_work_sync(&substream->runtime->event_work); | |
1da177e4 LT |
160 | } |
161 | ||
48c9d417 | 162 | int snd_rawmidi_drop_output(struct snd_rawmidi_substream *substream) |
1da177e4 LT |
163 | { |
164 | unsigned long flags; | |
48c9d417 | 165 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
1da177e4 LT |
166 | |
167 | snd_rawmidi_output_trigger(substream, 0); | |
168 | runtime->drain = 0; | |
169 | spin_lock_irqsave(&runtime->lock, flags); | |
170 | runtime->appl_ptr = runtime->hw_ptr = 0; | |
171 | runtime->avail = runtime->buffer_size; | |
172 | spin_unlock_irqrestore(&runtime->lock, flags); | |
173 | return 0; | |
174 | } | |
6776a5d7 | 175 | EXPORT_SYMBOL(snd_rawmidi_drop_output); |
1da177e4 | 176 | |
48c9d417 | 177 | int snd_rawmidi_drain_output(struct snd_rawmidi_substream *substream) |
1da177e4 LT |
178 | { |
179 | int err; | |
180 | long timeout; | |
48c9d417 | 181 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
1da177e4 LT |
182 | |
183 | err = 0; | |
184 | runtime->drain = 1; | |
185 | timeout = wait_event_interruptible_timeout(runtime->sleep, | |
186 | (runtime->avail >= runtime->buffer_size), | |
187 | 10*HZ); | |
188 | if (signal_pending(current)) | |
189 | err = -ERESTARTSYS; | |
190 | if (runtime->avail < runtime->buffer_size && !timeout) { | |
ca20d292 TI |
191 | rmidi_warn(substream->rmidi, |
192 | "rawmidi drain error (avail = %li, buffer_size = %li)\n", | |
193 | (long)runtime->avail, (long)runtime->buffer_size); | |
1da177e4 LT |
194 | err = -EIO; |
195 | } | |
196 | runtime->drain = 0; | |
197 | if (err != -ERESTARTSYS) { | |
198 | /* we need wait a while to make sure that Tx FIFOs are empty */ | |
199 | if (substream->ops->drain) | |
200 | substream->ops->drain(substream); | |
201 | else | |
202 | msleep(50); | |
203 | snd_rawmidi_drop_output(substream); | |
204 | } | |
205 | return err; | |
206 | } | |
6776a5d7 | 207 | EXPORT_SYMBOL(snd_rawmidi_drain_output); |
1da177e4 | 208 | |
48c9d417 | 209 | int snd_rawmidi_drain_input(struct snd_rawmidi_substream *substream) |
1da177e4 LT |
210 | { |
211 | unsigned long flags; | |
48c9d417 | 212 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
1da177e4 LT |
213 | |
214 | snd_rawmidi_input_trigger(substream, 0); | |
215 | runtime->drain = 0; | |
216 | spin_lock_irqsave(&runtime->lock, flags); | |
217 | runtime->appl_ptr = runtime->hw_ptr = 0; | |
218 | runtime->avail = 0; | |
219 | spin_unlock_irqrestore(&runtime->lock, flags); | |
220 | return 0; | |
221 | } | |
6776a5d7 | 222 | EXPORT_SYMBOL(snd_rawmidi_drain_input); |
1da177e4 | 223 | |
9a1b64ca TI |
224 | /* look for an available substream for the given stream direction; |
225 | * if a specific subdevice is given, try to assign it | |
226 | */ | |
227 | static int assign_substream(struct snd_rawmidi *rmidi, int subdevice, | |
228 | int stream, int mode, | |
229 | struct snd_rawmidi_substream **sub_ret) | |
1da177e4 | 230 | { |
9a1b64ca TI |
231 | struct snd_rawmidi_substream *substream; |
232 | struct snd_rawmidi_str *s = &rmidi->streams[stream]; | |
233 | static unsigned int info_flags[2] = { | |
234 | [SNDRV_RAWMIDI_STREAM_OUTPUT] = SNDRV_RAWMIDI_INFO_OUTPUT, | |
235 | [SNDRV_RAWMIDI_STREAM_INPUT] = SNDRV_RAWMIDI_INFO_INPUT, | |
236 | }; | |
1da177e4 | 237 | |
9a1b64ca | 238 | if (!(rmidi->info_flags & info_flags[stream])) |
f9d20283 | 239 | return -ENXIO; |
9a1b64ca TI |
240 | if (subdevice >= 0 && subdevice >= s->substream_count) |
241 | return -ENODEV; | |
9a1b64ca TI |
242 | |
243 | list_for_each_entry(substream, &s->substreams, list) { | |
244 | if (substream->opened) { | |
245 | if (stream == SNDRV_RAWMIDI_STREAM_INPUT || | |
16fb1096 CL |
246 | !(mode & SNDRV_RAWMIDI_LFLG_APPEND) || |
247 | !substream->append) | |
9a1b64ca TI |
248 | continue; |
249 | } | |
250 | if (subdevice < 0 || subdevice == substream->number) { | |
251 | *sub_ret = substream; | |
252 | return 0; | |
253 | } | |
1da177e4 | 254 | } |
9a1b64ca TI |
255 | return -EAGAIN; |
256 | } | |
f9d20283 | 257 | |
9a1b64ca TI |
258 | /* open and do ref-counting for the given substream */ |
259 | static int open_substream(struct snd_rawmidi *rmidi, | |
260 | struct snd_rawmidi_substream *substream, | |
261 | int mode) | |
262 | { | |
263 | int err; | |
264 | ||
8579d2d7 CL |
265 | if (substream->use_count == 0) { |
266 | err = snd_rawmidi_runtime_create(substream); | |
267 | if (err < 0) | |
268 | return err; | |
269 | err = substream->ops->open(substream); | |
b7fe750f CL |
270 | if (err < 0) { |
271 | snd_rawmidi_runtime_free(substream); | |
8579d2d7 | 272 | return err; |
b7fe750f | 273 | } |
8579d2d7 | 274 | substream->opened = 1; |
2d4b8420 | 275 | substream->active_sensing = 0; |
8579d2d7 CL |
276 | if (mode & SNDRV_RAWMIDI_LFLG_APPEND) |
277 | substream->append = 1; | |
7584af10 | 278 | substream->pid = get_pid(task_pid(current)); |
91d12c48 | 279 | rmidi->streams[substream->stream].substream_opened++; |
8579d2d7 CL |
280 | } |
281 | substream->use_count++; | |
9a1b64ca TI |
282 | return 0; |
283 | } | |
284 | ||
285 | static void close_substream(struct snd_rawmidi *rmidi, | |
286 | struct snd_rawmidi_substream *substream, | |
287 | int cleanup); | |
288 | ||
289 | static int rawmidi_open_priv(struct snd_rawmidi *rmidi, int subdevice, int mode, | |
290 | struct snd_rawmidi_file *rfile) | |
291 | { | |
292 | struct snd_rawmidi_substream *sinput = NULL, *soutput = NULL; | |
293 | int err; | |
294 | ||
295 | rfile->input = rfile->output = NULL; | |
1da177e4 | 296 | if (mode & SNDRV_RAWMIDI_LFLG_INPUT) { |
9a1b64ca TI |
297 | err = assign_substream(rmidi, subdevice, |
298 | SNDRV_RAWMIDI_STREAM_INPUT, | |
299 | mode, &sinput); | |
300 | if (err < 0) | |
b7fe750f | 301 | return err; |
1da177e4 LT |
302 | } |
303 | if (mode & SNDRV_RAWMIDI_LFLG_OUTPUT) { | |
9a1b64ca TI |
304 | err = assign_substream(rmidi, subdevice, |
305 | SNDRV_RAWMIDI_STREAM_OUTPUT, | |
306 | mode, &soutput); | |
307 | if (err < 0) | |
b7fe750f | 308 | return err; |
1da177e4 | 309 | } |
9a1b64ca TI |
310 | |
311 | if (sinput) { | |
312 | err = open_substream(rmidi, sinput, mode); | |
313 | if (err < 0) | |
b7fe750f | 314 | return err; |
1da177e4 | 315 | } |
9a1b64ca TI |
316 | if (soutput) { |
317 | err = open_substream(rmidi, soutput, mode); | |
318 | if (err < 0) { | |
319 | if (sinput) | |
320 | close_substream(rmidi, sinput, 0); | |
b7fe750f | 321 | return err; |
1da177e4 | 322 | } |
1da177e4 | 323 | } |
9a1b64ca TI |
324 | |
325 | rfile->rmidi = rmidi; | |
326 | rfile->input = sinput; | |
327 | rfile->output = soutput; | |
1da177e4 | 328 | return 0; |
9a1b64ca TI |
329 | } |
330 | ||
331 | /* called from sound/core/seq/seq_midi.c */ | |
332 | int snd_rawmidi_kernel_open(struct snd_card *card, int device, int subdevice, | |
333 | int mode, struct snd_rawmidi_file * rfile) | |
334 | { | |
335 | struct snd_rawmidi *rmidi; | |
336 | int err; | |
337 | ||
338 | if (snd_BUG_ON(!rfile)) | |
339 | return -EINVAL; | |
340 | ||
341 | mutex_lock(®ister_mutex); | |
342 | rmidi = snd_rawmidi_search(card, device); | |
343 | if (rmidi == NULL) { | |
344 | mutex_unlock(®ister_mutex); | |
345 | return -ENODEV; | |
346 | } | |
347 | if (!try_module_get(rmidi->card->module)) { | |
348 | mutex_unlock(®ister_mutex); | |
349 | return -ENXIO; | |
350 | } | |
351 | mutex_unlock(®ister_mutex); | |
352 | ||
353 | mutex_lock(&rmidi->open_mutex); | |
354 | err = rawmidi_open_priv(rmidi, subdevice, mode, rfile); | |
355 | mutex_unlock(&rmidi->open_mutex); | |
356 | if (err < 0) | |
357 | module_put(rmidi->card->module); | |
1da177e4 LT |
358 | return err; |
359 | } | |
6776a5d7 | 360 | EXPORT_SYMBOL(snd_rawmidi_kernel_open); |
1da177e4 LT |
361 | |
362 | static int snd_rawmidi_open(struct inode *inode, struct file *file) | |
363 | { | |
364 | int maj = imajor(inode); | |
48c9d417 | 365 | struct snd_card *card; |
f87135f5 | 366 | int subdevice; |
1da177e4 LT |
367 | unsigned short fflags; |
368 | int err; | |
48c9d417 | 369 | struct snd_rawmidi *rmidi; |
9a1b64ca | 370 | struct snd_rawmidi_file *rawmidi_file = NULL; |
1da177e4 | 371 | wait_queue_t wait; |
1da177e4 | 372 | |
9a1b64ca TI |
373 | if ((file->f_flags & O_APPEND) && !(file->f_flags & O_NONBLOCK)) |
374 | return -EINVAL; /* invalid combination */ | |
375 | ||
02f4865f TI |
376 | err = nonseekable_open(inode, file); |
377 | if (err < 0) | |
378 | return err; | |
379 | ||
f1902860 | 380 | if (maj == snd_major) { |
f87135f5 CL |
381 | rmidi = snd_lookup_minor_data(iminor(inode), |
382 | SNDRV_DEVICE_TYPE_RAWMIDI); | |
1da177e4 | 383 | #ifdef CONFIG_SND_OSSEMUL |
f1902860 | 384 | } else if (maj == SOUND_MAJOR) { |
f87135f5 CL |
385 | rmidi = snd_lookup_oss_minor_data(iminor(inode), |
386 | SNDRV_OSS_DEVICE_TYPE_MIDI); | |
1da177e4 | 387 | #endif |
f1902860 | 388 | } else |
1da177e4 | 389 | return -ENXIO; |
1da177e4 | 390 | |
1da177e4 LT |
391 | if (rmidi == NULL) |
392 | return -ENODEV; | |
9a1b64ca | 393 | |
a0830dbd TI |
394 | if (!try_module_get(rmidi->card->module)) { |
395 | snd_card_unref(rmidi->card); | |
9a1b64ca | 396 | return -ENXIO; |
a0830dbd | 397 | } |
9a1b64ca TI |
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 | 414 | while (1) { |
23c18d4b | 415 | subdevice = snd_ctl_get_preferred_subdevice(card, SND_CTL_SUBDEV_RAWMIDI); |
9a1b64ca | 416 | err = rawmidi_open_priv(rmidi, subdevice, fflags, rawmidi_file); |
1da177e4 LT |
417 | if (err >= 0) |
418 | break; | |
419 | if (err == -EAGAIN) { | |
420 | if (file->f_flags & O_NONBLOCK) { | |
421 | err = -EBUSY; | |
422 | break; | |
423 | } | |
424 | } else | |
425 | break; | |
426 | set_current_state(TASK_INTERRUPTIBLE); | |
1a60d4c5 | 427 | mutex_unlock(&rmidi->open_mutex); |
1da177e4 | 428 | schedule(); |
1a60d4c5 | 429 | mutex_lock(&rmidi->open_mutex); |
0914f796 TI |
430 | if (rmidi->card->shutdown) { |
431 | err = -ENODEV; | |
432 | break; | |
433 | } | |
1da177e4 LT |
434 | if (signal_pending(current)) { |
435 | err = -ERESTARTSYS; | |
436 | break; | |
437 | } | |
438 | } | |
9a1b64ca TI |
439 | remove_wait_queue(&rmidi->open_wait, &wait); |
440 | if (err < 0) { | |
441 | kfree(rawmidi_file); | |
442 | goto __error; | |
443 | } | |
1da177e4 LT |
444 | #ifdef CONFIG_SND_OSSEMUL |
445 | if (rawmidi_file->input && rawmidi_file->input->runtime) | |
446 | rawmidi_file->input->runtime->oss = (maj == SOUND_MAJOR); | |
447 | if (rawmidi_file->output && rawmidi_file->output->runtime) | |
448 | rawmidi_file->output->runtime->oss = (maj == SOUND_MAJOR); | |
449 | #endif | |
9a1b64ca TI |
450 | file->private_data = rawmidi_file; |
451 | mutex_unlock(&rmidi->open_mutex); | |
a0830dbd | 452 | snd_card_unref(rmidi->card); |
9a1b64ca TI |
453 | return 0; |
454 | ||
455 | __error: | |
456 | snd_card_file_remove(card, file); | |
457 | __error_card: | |
1a60d4c5 | 458 | mutex_unlock(&rmidi->open_mutex); |
9a1b64ca | 459 | module_put(rmidi->card->module); |
a0830dbd | 460 | snd_card_unref(rmidi->card); |
1da177e4 LT |
461 | return err; |
462 | } | |
463 | ||
9a1b64ca TI |
464 | static void close_substream(struct snd_rawmidi *rmidi, |
465 | struct snd_rawmidi_substream *substream, | |
466 | int cleanup) | |
1da177e4 | 467 | { |
9a1b64ca TI |
468 | if (--substream->use_count) |
469 | return; | |
1da177e4 | 470 | |
9a1b64ca TI |
471 | if (cleanup) { |
472 | if (substream->stream == SNDRV_RAWMIDI_STREAM_INPUT) | |
473 | snd_rawmidi_input_trigger(substream, 0); | |
474 | else { | |
1da177e4 LT |
475 | if (substream->active_sensing) { |
476 | unsigned char buf = 0xfe; | |
9a1b64ca TI |
477 | /* sending single active sensing message |
478 | * to shut the device up | |
479 | */ | |
1da177e4 LT |
480 | snd_rawmidi_kernel_write(substream, &buf, 1); |
481 | } | |
482 | if (snd_rawmidi_drain_output(substream) == -ERESTARTSYS) | |
483 | snd_rawmidi_output_trigger(substream, 0); | |
1da177e4 | 484 | } |
1da177e4 | 485 | } |
9a1b64ca TI |
486 | substream->ops->close(substream); |
487 | if (substream->runtime->private_free) | |
488 | substream->runtime->private_free(substream); | |
489 | snd_rawmidi_runtime_free(substream); | |
490 | substream->opened = 0; | |
491 | substream->append = 0; | |
7584af10 CL |
492 | put_pid(substream->pid); |
493 | substream->pid = NULL; | |
91d12c48 | 494 | rmidi->streams[substream->stream].substream_opened--; |
9a1b64ca TI |
495 | } |
496 | ||
497 | static void rawmidi_release_priv(struct snd_rawmidi_file *rfile) | |
498 | { | |
499 | struct snd_rawmidi *rmidi; | |
500 | ||
501 | rmidi = rfile->rmidi; | |
502 | mutex_lock(&rmidi->open_mutex); | |
503 | if (rfile->input) { | |
504 | close_substream(rmidi, rfile->input, 1); | |
505 | rfile->input = NULL; | |
506 | } | |
507 | if (rfile->output) { | |
508 | close_substream(rmidi, rfile->output, 1); | |
509 | rfile->output = NULL; | |
510 | } | |
511 | rfile->rmidi = NULL; | |
1a60d4c5 | 512 | mutex_unlock(&rmidi->open_mutex); |
9a1b64ca TI |
513 | wake_up(&rmidi->open_wait); |
514 | } | |
515 | ||
516 | /* called from sound/core/seq/seq_midi.c */ | |
517 | int snd_rawmidi_kernel_release(struct snd_rawmidi_file *rfile) | |
518 | { | |
519 | struct snd_rawmidi *rmidi; | |
520 | ||
521 | if (snd_BUG_ON(!rfile)) | |
522 | return -ENXIO; | |
523 | ||
524 | rmidi = rfile->rmidi; | |
525 | rawmidi_release_priv(rfile); | |
1da177e4 LT |
526 | module_put(rmidi->card->module); |
527 | return 0; | |
528 | } | |
6776a5d7 | 529 | EXPORT_SYMBOL(snd_rawmidi_kernel_release); |
1da177e4 LT |
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; | |
aa73aec6 | 535 | struct module *module; |
1da177e4 LT |
536 | |
537 | rfile = file->private_data; | |
1da177e4 | 538 | rmidi = rfile->rmidi; |
9a1b64ca | 539 | rawmidi_release_priv(rfile); |
1da177e4 | 540 | kfree(rfile); |
aa73aec6 | 541 | module = rmidi->card->module; |
1da177e4 | 542 | snd_card_file_remove(rmidi->card, file); |
aa73aec6 | 543 | module_put(module); |
9a1b64ca | 544 | return 0; |
1da177e4 LT |
545 | } |
546 | ||
18612048 AB |
547 | static int snd_rawmidi_info(struct snd_rawmidi_substream *substream, |
548 | struct snd_rawmidi_info *info) | |
1da177e4 | 549 | { |
48c9d417 | 550 | struct snd_rawmidi *rmidi; |
1da177e4 LT |
551 | |
552 | if (substream == NULL) | |
553 | return -ENODEV; | |
554 | rmidi = substream->rmidi; | |
555 | memset(info, 0, sizeof(*info)); | |
556 | info->card = rmidi->card->number; | |
557 | info->device = rmidi->device; | |
558 | info->subdevice = substream->number; | |
559 | info->stream = substream->stream; | |
560 | info->flags = rmidi->info_flags; | |
561 | strcpy(info->id, rmidi->id); | |
562 | strcpy(info->name, rmidi->name); | |
563 | strcpy(info->subname, substream->name); | |
564 | info->subdevices_count = substream->pstr->substream_count; | |
565 | info->subdevices_avail = (substream->pstr->substream_count - | |
566 | substream->pstr->substream_opened); | |
567 | return 0; | |
568 | } | |
569 | ||
48c9d417 TI |
570 | static int snd_rawmidi_info_user(struct snd_rawmidi_substream *substream, |
571 | struct snd_rawmidi_info __user * _info) | |
1da177e4 | 572 | { |
48c9d417 | 573 | struct snd_rawmidi_info info; |
1da177e4 LT |
574 | int err; |
575 | if ((err = snd_rawmidi_info(substream, &info)) < 0) | |
576 | return err; | |
48c9d417 | 577 | if (copy_to_user(_info, &info, sizeof(struct snd_rawmidi_info))) |
1da177e4 LT |
578 | return -EFAULT; |
579 | return 0; | |
580 | } | |
581 | ||
48c9d417 | 582 | int snd_rawmidi_info_select(struct snd_card *card, struct snd_rawmidi_info *info) |
1da177e4 | 583 | { |
48c9d417 TI |
584 | struct snd_rawmidi *rmidi; |
585 | struct snd_rawmidi_str *pstr; | |
586 | struct snd_rawmidi_substream *substream; | |
f87135f5 | 587 | |
1a60d4c5 | 588 | mutex_lock(®ister_mutex); |
f87135f5 | 589 | rmidi = snd_rawmidi_search(card, info->device); |
1a60d4c5 | 590 | mutex_unlock(®ister_mutex); |
a106cd3d CL |
591 | if (!rmidi) |
592 | return -ENXIO; | |
1da177e4 LT |
593 | if (info->stream < 0 || info->stream > 1) |
594 | return -EINVAL; | |
595 | pstr = &rmidi->streams[info->stream]; | |
596 | if (pstr->substream_count == 0) | |
597 | return -ENOENT; | |
598 | if (info->subdevice >= pstr->substream_count) | |
599 | return -ENXIO; | |
9244b2c3 | 600 | list_for_each_entry(substream, &pstr->substreams, list) { |
1da177e4 LT |
601 | if ((unsigned int)substream->number == info->subdevice) |
602 | return snd_rawmidi_info(substream, info); | |
603 | } | |
604 | return -ENXIO; | |
605 | } | |
6776a5d7 | 606 | EXPORT_SYMBOL(snd_rawmidi_info_select); |
1da177e4 | 607 | |
48c9d417 TI |
608 | static int snd_rawmidi_info_select_user(struct snd_card *card, |
609 | struct snd_rawmidi_info __user *_info) | |
1da177e4 LT |
610 | { |
611 | int err; | |
48c9d417 | 612 | struct snd_rawmidi_info info; |
1da177e4 LT |
613 | if (get_user(info.device, &_info->device)) |
614 | return -EFAULT; | |
615 | if (get_user(info.stream, &_info->stream)) | |
616 | return -EFAULT; | |
617 | if (get_user(info.subdevice, &_info->subdevice)) | |
618 | return -EFAULT; | |
619 | if ((err = snd_rawmidi_info_select(card, &info)) < 0) | |
620 | return err; | |
48c9d417 | 621 | if (copy_to_user(_info, &info, sizeof(struct snd_rawmidi_info))) |
1da177e4 LT |
622 | return -EFAULT; |
623 | return 0; | |
624 | } | |
625 | ||
48c9d417 TI |
626 | int snd_rawmidi_output_params(struct snd_rawmidi_substream *substream, |
627 | struct snd_rawmidi_params * params) | |
1da177e4 LT |
628 | { |
629 | char *newbuf; | |
48c9d417 | 630 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
1da177e4 LT |
631 | |
632 | if (substream->append && substream->use_count > 1) | |
633 | return -EBUSY; | |
634 | snd_rawmidi_drain_output(substream); | |
635 | if (params->buffer_size < 32 || params->buffer_size > 1024L * 1024L) { | |
636 | return -EINVAL; | |
637 | } | |
638 | if (params->avail_min < 1 || params->avail_min > params->buffer_size) { | |
639 | return -EINVAL; | |
640 | } | |
641 | if (params->buffer_size != runtime->buffer_size) { | |
3101ba03 TI |
642 | newbuf = krealloc(runtime->buffer, params->buffer_size, |
643 | GFP_KERNEL); | |
4fa95ef6 | 644 | if (!newbuf) |
1da177e4 | 645 | return -ENOMEM; |
1da177e4 LT |
646 | runtime->buffer = newbuf; |
647 | runtime->buffer_size = params->buffer_size; | |
1b98ea47 | 648 | runtime->avail = runtime->buffer_size; |
1da177e4 LT |
649 | } |
650 | runtime->avail_min = params->avail_min; | |
651 | substream->active_sensing = !params->no_active_sensing; | |
652 | return 0; | |
653 | } | |
6776a5d7 | 654 | EXPORT_SYMBOL(snd_rawmidi_output_params); |
1da177e4 | 655 | |
48c9d417 TI |
656 | int snd_rawmidi_input_params(struct snd_rawmidi_substream *substream, |
657 | struct snd_rawmidi_params * params) | |
1da177e4 LT |
658 | { |
659 | char *newbuf; | |
48c9d417 | 660 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
1da177e4 LT |
661 | |
662 | snd_rawmidi_drain_input(substream); | |
663 | if (params->buffer_size < 32 || params->buffer_size > 1024L * 1024L) { | |
664 | return -EINVAL; | |
665 | } | |
666 | if (params->avail_min < 1 || params->avail_min > params->buffer_size) { | |
667 | return -EINVAL; | |
668 | } | |
669 | if (params->buffer_size != runtime->buffer_size) { | |
3101ba03 TI |
670 | newbuf = krealloc(runtime->buffer, params->buffer_size, |
671 | GFP_KERNEL); | |
4fa95ef6 | 672 | if (!newbuf) |
1da177e4 | 673 | return -ENOMEM; |
1da177e4 LT |
674 | runtime->buffer = newbuf; |
675 | runtime->buffer_size = params->buffer_size; | |
676 | } | |
677 | runtime->avail_min = params->avail_min; | |
678 | return 0; | |
679 | } | |
6776a5d7 | 680 | EXPORT_SYMBOL(snd_rawmidi_input_params); |
1da177e4 | 681 | |
48c9d417 TI |
682 | static int snd_rawmidi_output_status(struct snd_rawmidi_substream *substream, |
683 | struct snd_rawmidi_status * status) | |
1da177e4 | 684 | { |
48c9d417 | 685 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
1da177e4 LT |
686 | |
687 | memset(status, 0, sizeof(*status)); | |
688 | status->stream = SNDRV_RAWMIDI_STREAM_OUTPUT; | |
689 | spin_lock_irq(&runtime->lock); | |
690 | status->avail = runtime->avail; | |
691 | spin_unlock_irq(&runtime->lock); | |
692 | return 0; | |
693 | } | |
694 | ||
48c9d417 TI |
695 | static int snd_rawmidi_input_status(struct snd_rawmidi_substream *substream, |
696 | struct snd_rawmidi_status * status) | |
1da177e4 | 697 | { |
48c9d417 | 698 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
1da177e4 LT |
699 | |
700 | memset(status, 0, sizeof(*status)); | |
701 | status->stream = SNDRV_RAWMIDI_STREAM_INPUT; | |
702 | spin_lock_irq(&runtime->lock); | |
703 | status->avail = runtime->avail; | |
704 | status->xruns = runtime->xruns; | |
705 | runtime->xruns = 0; | |
706 | spin_unlock_irq(&runtime->lock); | |
707 | return 0; | |
708 | } | |
709 | ||
710 | static long snd_rawmidi_ioctl(struct file *file, unsigned int cmd, unsigned long arg) | |
711 | { | |
48c9d417 | 712 | struct snd_rawmidi_file *rfile; |
1da177e4 LT |
713 | void __user *argp = (void __user *)arg; |
714 | ||
715 | rfile = file->private_data; | |
716 | if (((cmd >> 8) & 0xff) != 'W') | |
717 | return -ENOTTY; | |
718 | switch (cmd) { | |
719 | case SNDRV_RAWMIDI_IOCTL_PVERSION: | |
720 | return put_user(SNDRV_RAWMIDI_VERSION, (int __user *)argp) ? -EFAULT : 0; | |
721 | case SNDRV_RAWMIDI_IOCTL_INFO: | |
722 | { | |
48c9d417 TI |
723 | int stream; |
724 | struct snd_rawmidi_info __user *info = argp; | |
1da177e4 LT |
725 | if (get_user(stream, &info->stream)) |
726 | return -EFAULT; | |
727 | switch (stream) { | |
728 | case SNDRV_RAWMIDI_STREAM_INPUT: | |
729 | return snd_rawmidi_info_user(rfile->input, info); | |
730 | case SNDRV_RAWMIDI_STREAM_OUTPUT: | |
731 | return snd_rawmidi_info_user(rfile->output, info); | |
732 | default: | |
733 | return -EINVAL; | |
734 | } | |
735 | } | |
736 | case SNDRV_RAWMIDI_IOCTL_PARAMS: | |
737 | { | |
48c9d417 TI |
738 | struct snd_rawmidi_params params; |
739 | if (copy_from_user(¶ms, argp, sizeof(struct snd_rawmidi_params))) | |
1da177e4 LT |
740 | return -EFAULT; |
741 | switch (params.stream) { | |
742 | case SNDRV_RAWMIDI_STREAM_OUTPUT: | |
743 | if (rfile->output == NULL) | |
744 | return -EINVAL; | |
745 | return snd_rawmidi_output_params(rfile->output, ¶ms); | |
746 | case SNDRV_RAWMIDI_STREAM_INPUT: | |
747 | if (rfile->input == NULL) | |
748 | return -EINVAL; | |
749 | return snd_rawmidi_input_params(rfile->input, ¶ms); | |
750 | default: | |
751 | return -EINVAL; | |
752 | } | |
753 | } | |
754 | case SNDRV_RAWMIDI_IOCTL_STATUS: | |
755 | { | |
756 | int err = 0; | |
48c9d417 TI |
757 | struct snd_rawmidi_status status; |
758 | if (copy_from_user(&status, argp, sizeof(struct snd_rawmidi_status))) | |
1da177e4 LT |
759 | return -EFAULT; |
760 | switch (status.stream) { | |
761 | case SNDRV_RAWMIDI_STREAM_OUTPUT: | |
762 | if (rfile->output == NULL) | |
763 | return -EINVAL; | |
764 | err = snd_rawmidi_output_status(rfile->output, &status); | |
765 | break; | |
766 | case SNDRV_RAWMIDI_STREAM_INPUT: | |
767 | if (rfile->input == NULL) | |
768 | return -EINVAL; | |
769 | err = snd_rawmidi_input_status(rfile->input, &status); | |
770 | break; | |
771 | default: | |
772 | return -EINVAL; | |
773 | } | |
774 | if (err < 0) | |
775 | return err; | |
48c9d417 | 776 | if (copy_to_user(argp, &status, sizeof(struct snd_rawmidi_status))) |
1da177e4 LT |
777 | return -EFAULT; |
778 | return 0; | |
779 | } | |
780 | case SNDRV_RAWMIDI_IOCTL_DROP: | |
781 | { | |
782 | int val; | |
783 | if (get_user(val, (int __user *) argp)) | |
784 | return -EFAULT; | |
785 | switch (val) { | |
786 | case SNDRV_RAWMIDI_STREAM_OUTPUT: | |
787 | if (rfile->output == NULL) | |
788 | return -EINVAL; | |
789 | return snd_rawmidi_drop_output(rfile->output); | |
790 | default: | |
791 | return -EINVAL; | |
792 | } | |
793 | } | |
794 | case SNDRV_RAWMIDI_IOCTL_DRAIN: | |
795 | { | |
796 | int val; | |
797 | if (get_user(val, (int __user *) argp)) | |
798 | return -EFAULT; | |
799 | switch (val) { | |
800 | case SNDRV_RAWMIDI_STREAM_OUTPUT: | |
801 | if (rfile->output == NULL) | |
802 | return -EINVAL; | |
803 | return snd_rawmidi_drain_output(rfile->output); | |
804 | case SNDRV_RAWMIDI_STREAM_INPUT: | |
805 | if (rfile->input == NULL) | |
806 | return -EINVAL; | |
807 | return snd_rawmidi_drain_input(rfile->input); | |
808 | default: | |
809 | return -EINVAL; | |
810 | } | |
811 | } | |
1da177e4 | 812 | default: |
ca20d292 TI |
813 | rmidi_dbg(rfile->rmidi, |
814 | "rawmidi: unknown command = 0x%x\n", cmd); | |
1da177e4 LT |
815 | } |
816 | return -ENOTTY; | |
817 | } | |
818 | ||
48c9d417 TI |
819 | static int snd_rawmidi_control_ioctl(struct snd_card *card, |
820 | struct snd_ctl_file *control, | |
1da177e4 LT |
821 | unsigned int cmd, |
822 | unsigned long arg) | |
823 | { | |
824 | void __user *argp = (void __user *)arg; | |
1da177e4 | 825 | |
1da177e4 LT |
826 | switch (cmd) { |
827 | case SNDRV_CTL_IOCTL_RAWMIDI_NEXT_DEVICE: | |
828 | { | |
829 | int device; | |
830 | ||
831 | if (get_user(device, (int __user *)argp)) | |
832 | return -EFAULT; | |
a7a13d06 DC |
833 | if (device >= SNDRV_RAWMIDI_DEVICES) /* next device is -1 */ |
834 | device = SNDRV_RAWMIDI_DEVICES - 1; | |
1a60d4c5 | 835 | mutex_lock(®ister_mutex); |
1da177e4 LT |
836 | device = device < 0 ? 0 : device + 1; |
837 | while (device < SNDRV_RAWMIDI_DEVICES) { | |
f87135f5 | 838 | if (snd_rawmidi_search(card, device)) |
1da177e4 LT |
839 | break; |
840 | device++; | |
841 | } | |
842 | if (device == SNDRV_RAWMIDI_DEVICES) | |
843 | device = -1; | |
1a60d4c5 | 844 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
845 | if (put_user(device, (int __user *)argp)) |
846 | return -EFAULT; | |
847 | return 0; | |
848 | } | |
849 | case SNDRV_CTL_IOCTL_RAWMIDI_PREFER_SUBDEVICE: | |
850 | { | |
851 | int val; | |
852 | ||
853 | if (get_user(val, (int __user *)argp)) | |
854 | return -EFAULT; | |
23c18d4b | 855 | control->preferred_subdevice[SND_CTL_SUBDEV_RAWMIDI] = val; |
1da177e4 LT |
856 | return 0; |
857 | } | |
858 | case SNDRV_CTL_IOCTL_RAWMIDI_INFO: | |
859 | return snd_rawmidi_info_select_user(card, argp); | |
860 | } | |
861 | return -ENOIOCTLCMD; | |
862 | } | |
863 | ||
864 | /** | |
865 | * snd_rawmidi_receive - receive the input data from the device | |
866 | * @substream: the rawmidi substream | |
867 | * @buffer: the buffer pointer | |
868 | * @count: the data size to read | |
869 | * | |
870 | * Reads the data from the internal buffer. | |
871 | * | |
eb7c06e8 | 872 | * Return: The size of read data, or a negative error code on failure. |
1da177e4 | 873 | */ |
48c9d417 TI |
874 | int snd_rawmidi_receive(struct snd_rawmidi_substream *substream, |
875 | const unsigned char *buffer, int count) | |
1da177e4 LT |
876 | { |
877 | unsigned long flags; | |
878 | int result = 0, count1; | |
48c9d417 | 879 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
1da177e4 | 880 | |
219df32f TI |
881 | if (!substream->opened) |
882 | return -EBADFD; | |
1da177e4 | 883 | if (runtime->buffer == NULL) { |
ca20d292 TI |
884 | rmidi_dbg(substream->rmidi, |
885 | "snd_rawmidi_receive: input is not active!!!\n"); | |
1da177e4 LT |
886 | return -EINVAL; |
887 | } | |
888 | spin_lock_irqsave(&runtime->lock, flags); | |
889 | if (count == 1) { /* special case, faster code */ | |
890 | substream->bytes++; | |
891 | if (runtime->avail < runtime->buffer_size) { | |
892 | runtime->buffer[runtime->hw_ptr++] = buffer[0]; | |
893 | runtime->hw_ptr %= runtime->buffer_size; | |
894 | runtime->avail++; | |
895 | result++; | |
896 | } else { | |
897 | runtime->xruns++; | |
898 | } | |
899 | } else { | |
900 | substream->bytes += count; | |
901 | count1 = runtime->buffer_size - runtime->hw_ptr; | |
902 | if (count1 > count) | |
903 | count1 = count; | |
904 | if (count1 > (int)(runtime->buffer_size - runtime->avail)) | |
905 | count1 = runtime->buffer_size - runtime->avail; | |
906 | memcpy(runtime->buffer + runtime->hw_ptr, buffer, count1); | |
907 | runtime->hw_ptr += count1; | |
908 | runtime->hw_ptr %= runtime->buffer_size; | |
909 | runtime->avail += count1; | |
910 | count -= count1; | |
911 | result += count1; | |
912 | if (count > 0) { | |
913 | buffer += count1; | |
914 | count1 = count; | |
915 | if (count1 > (int)(runtime->buffer_size - runtime->avail)) { | |
916 | count1 = runtime->buffer_size - runtime->avail; | |
917 | runtime->xruns += count - count1; | |
918 | } | |
919 | if (count1 > 0) { | |
920 | memcpy(runtime->buffer, buffer, count1); | |
921 | runtime->hw_ptr = count1; | |
922 | runtime->avail += count1; | |
923 | result += count1; | |
924 | } | |
925 | } | |
926 | } | |
927 | if (result > 0) { | |
928 | if (runtime->event) | |
b3c705aa | 929 | schedule_work(&runtime->event_work); |
1da177e4 LT |
930 | else if (snd_rawmidi_ready(substream)) |
931 | wake_up(&runtime->sleep); | |
932 | } | |
933 | spin_unlock_irqrestore(&runtime->lock, flags); | |
934 | return result; | |
935 | } | |
6776a5d7 | 936 | EXPORT_SYMBOL(snd_rawmidi_receive); |
1da177e4 | 937 | |
48c9d417 | 938 | static long snd_rawmidi_kernel_read1(struct snd_rawmidi_substream *substream, |
17596a80 MÅš |
939 | unsigned char __user *userbuf, |
940 | unsigned char *kernelbuf, long count) | |
1da177e4 LT |
941 | { |
942 | unsigned long flags; | |
943 | long result = 0, count1; | |
48c9d417 | 944 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
1da177e4 LT |
945 | |
946 | while (count > 0 && runtime->avail) { | |
947 | count1 = runtime->buffer_size - runtime->appl_ptr; | |
948 | if (count1 > count) | |
949 | count1 = count; | |
950 | spin_lock_irqsave(&runtime->lock, flags); | |
951 | if (count1 > (int)runtime->avail) | |
952 | count1 = runtime->avail; | |
17596a80 MÅš |
953 | if (kernelbuf) |
954 | memcpy(kernelbuf + result, runtime->buffer + runtime->appl_ptr, count1); | |
955 | if (userbuf) { | |
1da177e4 | 956 | spin_unlock_irqrestore(&runtime->lock, flags); |
17596a80 | 957 | if (copy_to_user(userbuf + result, |
1da177e4 LT |
958 | runtime->buffer + runtime->appl_ptr, count1)) { |
959 | return result > 0 ? result : -EFAULT; | |
960 | } | |
961 | spin_lock_irqsave(&runtime->lock, flags); | |
962 | } | |
963 | runtime->appl_ptr += count1; | |
964 | runtime->appl_ptr %= runtime->buffer_size; | |
965 | runtime->avail -= count1; | |
966 | spin_unlock_irqrestore(&runtime->lock, flags); | |
967 | result += count1; | |
968 | count -= count1; | |
969 | } | |
970 | return result; | |
971 | } | |
972 | ||
48c9d417 TI |
973 | long snd_rawmidi_kernel_read(struct snd_rawmidi_substream *substream, |
974 | unsigned char *buf, long count) | |
1da177e4 LT |
975 | { |
976 | snd_rawmidi_input_trigger(substream, 1); | |
17596a80 | 977 | return snd_rawmidi_kernel_read1(substream, NULL/*userbuf*/, buf, count); |
1da177e4 | 978 | } |
6776a5d7 | 979 | EXPORT_SYMBOL(snd_rawmidi_kernel_read); |
1da177e4 | 980 | |
48c9d417 TI |
981 | static ssize_t snd_rawmidi_read(struct file *file, char __user *buf, size_t count, |
982 | loff_t *offset) | |
1da177e4 LT |
983 | { |
984 | long result; | |
985 | int count1; | |
48c9d417 TI |
986 | struct snd_rawmidi_file *rfile; |
987 | struct snd_rawmidi_substream *substream; | |
988 | struct snd_rawmidi_runtime *runtime; | |
1da177e4 LT |
989 | |
990 | rfile = file->private_data; | |
991 | substream = rfile->input; | |
992 | if (substream == NULL) | |
993 | return -EIO; | |
994 | runtime = substream->runtime; | |
995 | snd_rawmidi_input_trigger(substream, 1); | |
996 | result = 0; | |
997 | while (count > 0) { | |
998 | spin_lock_irq(&runtime->lock); | |
999 | while (!snd_rawmidi_ready(substream)) { | |
1000 | wait_queue_t wait; | |
1001 | if ((file->f_flags & O_NONBLOCK) != 0 || result > 0) { | |
1002 | spin_unlock_irq(&runtime->lock); | |
1003 | return result > 0 ? result : -EAGAIN; | |
1004 | } | |
1005 | init_waitqueue_entry(&wait, current); | |
1006 | add_wait_queue(&runtime->sleep, &wait); | |
1007 | set_current_state(TASK_INTERRUPTIBLE); | |
1008 | spin_unlock_irq(&runtime->lock); | |
1009 | schedule(); | |
1010 | remove_wait_queue(&runtime->sleep, &wait); | |
0914f796 TI |
1011 | if (rfile->rmidi->card->shutdown) |
1012 | return -ENODEV; | |
1da177e4 LT |
1013 | if (signal_pending(current)) |
1014 | return result > 0 ? result : -ERESTARTSYS; | |
1015 | if (!runtime->avail) | |
1016 | return result > 0 ? result : -EIO; | |
1017 | spin_lock_irq(&runtime->lock); | |
1018 | } | |
1019 | spin_unlock_irq(&runtime->lock); | |
4d23359b | 1020 | count1 = snd_rawmidi_kernel_read1(substream, |
17596a80 MÅš |
1021 | (unsigned char __user *)buf, |
1022 | NULL/*kernelbuf*/, | |
1023 | count); | |
1da177e4 LT |
1024 | if (count1 < 0) |
1025 | return result > 0 ? result : count1; | |
1026 | result += count1; | |
1027 | buf += count1; | |
1028 | count -= count1; | |
1029 | } | |
1030 | return result; | |
1031 | } | |
1032 | ||
1033 | /** | |
1034 | * snd_rawmidi_transmit_empty - check whether the output buffer is empty | |
1035 | * @substream: the rawmidi substream | |
eb7c06e8 YB |
1036 | * |
1037 | * Return: 1 if the internal output buffer is empty, 0 if not. | |
1da177e4 | 1038 | */ |
48c9d417 | 1039 | int snd_rawmidi_transmit_empty(struct snd_rawmidi_substream *substream) |
1da177e4 | 1040 | { |
48c9d417 | 1041 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
1da177e4 LT |
1042 | int result; |
1043 | unsigned long flags; | |
1044 | ||
1045 | if (runtime->buffer == NULL) { | |
ca20d292 TI |
1046 | rmidi_dbg(substream->rmidi, |
1047 | "snd_rawmidi_transmit_empty: output is not active!!!\n"); | |
1da177e4 LT |
1048 | return 1; |
1049 | } | |
1050 | spin_lock_irqsave(&runtime->lock, flags); | |
1051 | result = runtime->avail >= runtime->buffer_size; | |
1052 | spin_unlock_irqrestore(&runtime->lock, flags); | |
1053 | return result; | |
1054 | } | |
6776a5d7 | 1055 | EXPORT_SYMBOL(snd_rawmidi_transmit_empty); |
1da177e4 LT |
1056 | |
1057 | /** | |
1058 | * snd_rawmidi_transmit_peek - copy data from the internal buffer | |
1059 | * @substream: the rawmidi substream | |
1060 | * @buffer: the buffer pointer | |
1061 | * @count: data size to transfer | |
1062 | * | |
1063 | * Copies data from the internal output buffer to the given buffer. | |
1064 | * | |
1065 | * Call this in the interrupt handler when the midi output is ready, | |
1066 | * and call snd_rawmidi_transmit_ack() after the transmission is | |
1067 | * finished. | |
1068 | * | |
eb7c06e8 | 1069 | * Return: The size of copied data, or a negative error code on failure. |
1da177e4 | 1070 | */ |
48c9d417 TI |
1071 | int snd_rawmidi_transmit_peek(struct snd_rawmidi_substream *substream, |
1072 | unsigned char *buffer, int count) | |
1da177e4 LT |
1073 | { |
1074 | unsigned long flags; | |
1075 | int result, count1; | |
48c9d417 | 1076 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
1da177e4 LT |
1077 | |
1078 | if (runtime->buffer == NULL) { | |
ca20d292 TI |
1079 | rmidi_dbg(substream->rmidi, |
1080 | "snd_rawmidi_transmit_peek: output is not active!!!\n"); | |
1da177e4 LT |
1081 | return -EINVAL; |
1082 | } | |
1083 | result = 0; | |
1084 | spin_lock_irqsave(&runtime->lock, flags); | |
1085 | if (runtime->avail >= runtime->buffer_size) { | |
1086 | /* warning: lowlevel layer MUST trigger down the hardware */ | |
1087 | goto __skip; | |
1088 | } | |
1089 | if (count == 1) { /* special case, faster code */ | |
1090 | *buffer = runtime->buffer[runtime->hw_ptr]; | |
1091 | result++; | |
1092 | } else { | |
1093 | count1 = runtime->buffer_size - runtime->hw_ptr; | |
1094 | if (count1 > count) | |
1095 | count1 = count; | |
1096 | if (count1 > (int)(runtime->buffer_size - runtime->avail)) | |
1097 | count1 = runtime->buffer_size - runtime->avail; | |
1098 | memcpy(buffer, runtime->buffer + runtime->hw_ptr, count1); | |
1099 | count -= count1; | |
1100 | result += count1; | |
1101 | if (count > 0) { | |
1102 | if (count > (int)(runtime->buffer_size - runtime->avail - count1)) | |
1103 | count = runtime->buffer_size - runtime->avail - count1; | |
1104 | memcpy(buffer + count1, runtime->buffer, count); | |
1105 | result += count; | |
1106 | } | |
1107 | } | |
1108 | __skip: | |
1109 | spin_unlock_irqrestore(&runtime->lock, flags); | |
1110 | return result; | |
1111 | } | |
6776a5d7 | 1112 | EXPORT_SYMBOL(snd_rawmidi_transmit_peek); |
1da177e4 LT |
1113 | |
1114 | /** | |
1115 | * snd_rawmidi_transmit_ack - acknowledge the transmission | |
1116 | * @substream: the rawmidi substream | |
0a11458c | 1117 | * @count: the transferred count |
1da177e4 LT |
1118 | * |
1119 | * Advances the hardware pointer for the internal output buffer with | |
1120 | * the given size and updates the condition. | |
1121 | * Call after the transmission is finished. | |
1122 | * | |
eb7c06e8 | 1123 | * Return: The advanced size if successful, or a negative error code on failure. |
1da177e4 | 1124 | */ |
48c9d417 | 1125 | int snd_rawmidi_transmit_ack(struct snd_rawmidi_substream *substream, int count) |
1da177e4 LT |
1126 | { |
1127 | unsigned long flags; | |
48c9d417 | 1128 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
1da177e4 LT |
1129 | |
1130 | if (runtime->buffer == NULL) { | |
ca20d292 TI |
1131 | rmidi_dbg(substream->rmidi, |
1132 | "snd_rawmidi_transmit_ack: output is not active!!!\n"); | |
1da177e4 LT |
1133 | return -EINVAL; |
1134 | } | |
1135 | spin_lock_irqsave(&runtime->lock, flags); | |
7eaa943c | 1136 | snd_BUG_ON(runtime->avail + count > runtime->buffer_size); |
1da177e4 LT |
1137 | runtime->hw_ptr += count; |
1138 | runtime->hw_ptr %= runtime->buffer_size; | |
1139 | runtime->avail += count; | |
1140 | substream->bytes += count; | |
1141 | if (count > 0) { | |
1142 | if (runtime->drain || snd_rawmidi_ready(substream)) | |
1143 | wake_up(&runtime->sleep); | |
1144 | } | |
1145 | spin_unlock_irqrestore(&runtime->lock, flags); | |
1146 | return count; | |
1147 | } | |
6776a5d7 | 1148 | EXPORT_SYMBOL(snd_rawmidi_transmit_ack); |
1da177e4 LT |
1149 | |
1150 | /** | |
1151 | * snd_rawmidi_transmit - copy from the buffer to the device | |
1152 | * @substream: the rawmidi substream | |
df8db936 | 1153 | * @buffer: the buffer pointer |
1da177e4 LT |
1154 | * @count: the data size to transfer |
1155 | * | |
1156 | * Copies data from the buffer to the device and advances the pointer. | |
1157 | * | |
eb7c06e8 | 1158 | * Return: The copied size if successful, or a negative error code on failure. |
1da177e4 | 1159 | */ |
48c9d417 TI |
1160 | int snd_rawmidi_transmit(struct snd_rawmidi_substream *substream, |
1161 | unsigned char *buffer, int count) | |
1da177e4 | 1162 | { |
219df32f TI |
1163 | if (!substream->opened) |
1164 | return -EBADFD; | |
1da177e4 LT |
1165 | count = snd_rawmidi_transmit_peek(substream, buffer, count); |
1166 | if (count < 0) | |
1167 | return count; | |
1168 | return snd_rawmidi_transmit_ack(substream, count); | |
1169 | } | |
6776a5d7 | 1170 | EXPORT_SYMBOL(snd_rawmidi_transmit); |
1da177e4 | 1171 | |
48c9d417 | 1172 | static long snd_rawmidi_kernel_write1(struct snd_rawmidi_substream *substream, |
17596a80 MÅš |
1173 | const unsigned char __user *userbuf, |
1174 | const unsigned char *kernelbuf, | |
1175 | long count) | |
1da177e4 LT |
1176 | { |
1177 | unsigned long flags; | |
1178 | long count1, result; | |
48c9d417 | 1179 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
1da177e4 | 1180 | |
7eaa943c TI |
1181 | if (snd_BUG_ON(!kernelbuf && !userbuf)) |
1182 | return -EINVAL; | |
1183 | if (snd_BUG_ON(!runtime->buffer)) | |
1184 | return -EINVAL; | |
1da177e4 LT |
1185 | |
1186 | result = 0; | |
1187 | spin_lock_irqsave(&runtime->lock, flags); | |
1188 | if (substream->append) { | |
1189 | if ((long)runtime->avail < count) { | |
1190 | spin_unlock_irqrestore(&runtime->lock, flags); | |
1191 | return -EAGAIN; | |
1192 | } | |
1193 | } | |
1194 | while (count > 0 && runtime->avail > 0) { | |
1195 | count1 = runtime->buffer_size - runtime->appl_ptr; | |
1196 | if (count1 > count) | |
1197 | count1 = count; | |
1198 | if (count1 > (long)runtime->avail) | |
1199 | count1 = runtime->avail; | |
17596a80 MÅš |
1200 | if (kernelbuf) |
1201 | memcpy(runtime->buffer + runtime->appl_ptr, | |
1202 | kernelbuf + result, count1); | |
1203 | else if (userbuf) { | |
1da177e4 LT |
1204 | spin_unlock_irqrestore(&runtime->lock, flags); |
1205 | if (copy_from_user(runtime->buffer + runtime->appl_ptr, | |
17596a80 | 1206 | userbuf + result, count1)) { |
1da177e4 LT |
1207 | spin_lock_irqsave(&runtime->lock, flags); |
1208 | result = result > 0 ? result : -EFAULT; | |
1209 | goto __end; | |
1210 | } | |
1211 | spin_lock_irqsave(&runtime->lock, flags); | |
1212 | } | |
1213 | runtime->appl_ptr += count1; | |
1214 | runtime->appl_ptr %= runtime->buffer_size; | |
1215 | runtime->avail -= count1; | |
1216 | result += count1; | |
1da177e4 LT |
1217 | count -= count1; |
1218 | } | |
1219 | __end: | |
1220 | count1 = runtime->avail < runtime->buffer_size; | |
1221 | spin_unlock_irqrestore(&runtime->lock, flags); | |
1222 | if (count1) | |
1223 | snd_rawmidi_output_trigger(substream, 1); | |
1224 | return result; | |
1225 | } | |
1226 | ||
48c9d417 TI |
1227 | long snd_rawmidi_kernel_write(struct snd_rawmidi_substream *substream, |
1228 | const unsigned char *buf, long count) | |
1da177e4 | 1229 | { |
17596a80 | 1230 | return snd_rawmidi_kernel_write1(substream, NULL, buf, count); |
1da177e4 | 1231 | } |
6776a5d7 | 1232 | EXPORT_SYMBOL(snd_rawmidi_kernel_write); |
1da177e4 | 1233 | |
48c9d417 TI |
1234 | static ssize_t snd_rawmidi_write(struct file *file, const char __user *buf, |
1235 | size_t count, loff_t *offset) | |
1da177e4 LT |
1236 | { |
1237 | long result, timeout; | |
1238 | int count1; | |
48c9d417 TI |
1239 | struct snd_rawmidi_file *rfile; |
1240 | struct snd_rawmidi_runtime *runtime; | |
1241 | struct snd_rawmidi_substream *substream; | |
1da177e4 LT |
1242 | |
1243 | rfile = file->private_data; | |
1244 | substream = rfile->output; | |
1245 | runtime = substream->runtime; | |
1246 | /* we cannot put an atomic message to our buffer */ | |
1247 | if (substream->append && count > runtime->buffer_size) | |
1248 | return -EIO; | |
1249 | result = 0; | |
1250 | while (count > 0) { | |
1251 | spin_lock_irq(&runtime->lock); | |
1252 | while (!snd_rawmidi_ready_append(substream, count)) { | |
1253 | wait_queue_t wait; | |
1254 | if (file->f_flags & O_NONBLOCK) { | |
1255 | spin_unlock_irq(&runtime->lock); | |
1256 | return result > 0 ? result : -EAGAIN; | |
1257 | } | |
1258 | init_waitqueue_entry(&wait, current); | |
1259 | add_wait_queue(&runtime->sleep, &wait); | |
1260 | set_current_state(TASK_INTERRUPTIBLE); | |
1261 | spin_unlock_irq(&runtime->lock); | |
1262 | timeout = schedule_timeout(30 * HZ); | |
1263 | remove_wait_queue(&runtime->sleep, &wait); | |
0914f796 TI |
1264 | if (rfile->rmidi->card->shutdown) |
1265 | return -ENODEV; | |
1da177e4 LT |
1266 | if (signal_pending(current)) |
1267 | return result > 0 ? result : -ERESTARTSYS; | |
1268 | if (!runtime->avail && !timeout) | |
1269 | return result > 0 ? result : -EIO; | |
1270 | spin_lock_irq(&runtime->lock); | |
1271 | } | |
1272 | spin_unlock_irq(&runtime->lock); | |
17596a80 | 1273 | count1 = snd_rawmidi_kernel_write1(substream, buf, NULL, count); |
1da177e4 LT |
1274 | if (count1 < 0) |
1275 | return result > 0 ? result : count1; | |
1276 | result += count1; | |
1277 | buf += count1; | |
1278 | if ((size_t)count1 < count && (file->f_flags & O_NONBLOCK)) | |
1279 | break; | |
1280 | count -= count1; | |
1281 | } | |
6b2f3d1f | 1282 | if (file->f_flags & O_DSYNC) { |
1da177e4 LT |
1283 | spin_lock_irq(&runtime->lock); |
1284 | while (runtime->avail != runtime->buffer_size) { | |
1285 | wait_queue_t wait; | |
1286 | unsigned int last_avail = runtime->avail; | |
1287 | init_waitqueue_entry(&wait, current); | |
1288 | add_wait_queue(&runtime->sleep, &wait); | |
1289 | set_current_state(TASK_INTERRUPTIBLE); | |
1290 | spin_unlock_irq(&runtime->lock); | |
1291 | timeout = schedule_timeout(30 * HZ); | |
1292 | remove_wait_queue(&runtime->sleep, &wait); | |
1293 | if (signal_pending(current)) | |
1294 | return result > 0 ? result : -ERESTARTSYS; | |
1295 | if (runtime->avail == last_avail && !timeout) | |
1296 | return result > 0 ? result : -EIO; | |
1297 | spin_lock_irq(&runtime->lock); | |
1298 | } | |
1299 | spin_unlock_irq(&runtime->lock); | |
1300 | } | |
1301 | return result; | |
1302 | } | |
1303 | ||
1304 | static unsigned int snd_rawmidi_poll(struct file *file, poll_table * wait) | |
1305 | { | |
48c9d417 TI |
1306 | struct snd_rawmidi_file *rfile; |
1307 | struct snd_rawmidi_runtime *runtime; | |
1da177e4 LT |
1308 | unsigned int mask; |
1309 | ||
1310 | rfile = file->private_data; | |
1311 | if (rfile->input != NULL) { | |
1312 | runtime = rfile->input->runtime; | |
1313 | snd_rawmidi_input_trigger(rfile->input, 1); | |
1314 | poll_wait(file, &runtime->sleep, wait); | |
1315 | } | |
1316 | if (rfile->output != NULL) { | |
1317 | runtime = rfile->output->runtime; | |
1318 | poll_wait(file, &runtime->sleep, wait); | |
1319 | } | |
1320 | mask = 0; | |
1321 | if (rfile->input != NULL) { | |
1322 | if (snd_rawmidi_ready(rfile->input)) | |
1323 | mask |= POLLIN | POLLRDNORM; | |
1324 | } | |
1325 | if (rfile->output != NULL) { | |
1326 | if (snd_rawmidi_ready(rfile->output)) | |
1327 | mask |= POLLOUT | POLLWRNORM; | |
1328 | } | |
1329 | return mask; | |
1330 | } | |
1331 | ||
1332 | /* | |
1333 | */ | |
1334 | #ifdef CONFIG_COMPAT | |
1335 | #include "rawmidi_compat.c" | |
1336 | #else | |
1337 | #define snd_rawmidi_ioctl_compat NULL | |
1338 | #endif | |
1339 | ||
1340 | /* | |
1341 | ||
1342 | */ | |
1343 | ||
48c9d417 TI |
1344 | static void snd_rawmidi_proc_info_read(struct snd_info_entry *entry, |
1345 | struct snd_info_buffer *buffer) | |
1da177e4 | 1346 | { |
48c9d417 TI |
1347 | struct snd_rawmidi *rmidi; |
1348 | struct snd_rawmidi_substream *substream; | |
1349 | struct snd_rawmidi_runtime *runtime; | |
1da177e4 LT |
1350 | |
1351 | rmidi = entry->private_data; | |
1352 | snd_iprintf(buffer, "%s\n\n", rmidi->name); | |
1a60d4c5 | 1353 | mutex_lock(&rmidi->open_mutex); |
1da177e4 | 1354 | if (rmidi->info_flags & SNDRV_RAWMIDI_INFO_OUTPUT) { |
9244b2c3 JB |
1355 | list_for_each_entry(substream, |
1356 | &rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substreams, | |
1357 | list) { | |
1da177e4 LT |
1358 | snd_iprintf(buffer, |
1359 | "Output %d\n" | |
1360 | " Tx bytes : %lu\n", | |
1361 | substream->number, | |
1362 | (unsigned long) substream->bytes); | |
1363 | if (substream->opened) { | |
7584af10 CL |
1364 | snd_iprintf(buffer, |
1365 | " Owner PID : %d\n", | |
1366 | pid_vnr(substream->pid)); | |
1da177e4 LT |
1367 | runtime = substream->runtime; |
1368 | snd_iprintf(buffer, | |
1369 | " Mode : %s\n" | |
1370 | " Buffer size : %lu\n" | |
1371 | " Avail : %lu\n", | |
1372 | runtime->oss ? "OSS compatible" : "native", | |
1373 | (unsigned long) runtime->buffer_size, | |
1374 | (unsigned long) runtime->avail); | |
1375 | } | |
1376 | } | |
1377 | } | |
1378 | if (rmidi->info_flags & SNDRV_RAWMIDI_INFO_INPUT) { | |
9244b2c3 JB |
1379 | list_for_each_entry(substream, |
1380 | &rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substreams, | |
1381 | list) { | |
1da177e4 LT |
1382 | snd_iprintf(buffer, |
1383 | "Input %d\n" | |
1384 | " Rx bytes : %lu\n", | |
1385 | substream->number, | |
1386 | (unsigned long) substream->bytes); | |
1387 | if (substream->opened) { | |
7584af10 CL |
1388 | snd_iprintf(buffer, |
1389 | " Owner PID : %d\n", | |
1390 | pid_vnr(substream->pid)); | |
1da177e4 LT |
1391 | runtime = substream->runtime; |
1392 | snd_iprintf(buffer, | |
1393 | " Buffer size : %lu\n" | |
1394 | " Avail : %lu\n" | |
1395 | " Overruns : %lu\n", | |
1396 | (unsigned long) runtime->buffer_size, | |
1397 | (unsigned long) runtime->avail, | |
1398 | (unsigned long) runtime->xruns); | |
1399 | } | |
1400 | } | |
1401 | } | |
1a60d4c5 | 1402 | mutex_unlock(&rmidi->open_mutex); |
1da177e4 LT |
1403 | } |
1404 | ||
1405 | /* | |
1406 | * Register functions | |
1407 | */ | |
1408 | ||
9c2e08c5 | 1409 | static const struct file_operations snd_rawmidi_f_ops = |
1da177e4 LT |
1410 | { |
1411 | .owner = THIS_MODULE, | |
1412 | .read = snd_rawmidi_read, | |
1413 | .write = snd_rawmidi_write, | |
1414 | .open = snd_rawmidi_open, | |
1415 | .release = snd_rawmidi_release, | |
02f4865f | 1416 | .llseek = no_llseek, |
1da177e4 LT |
1417 | .poll = snd_rawmidi_poll, |
1418 | .unlocked_ioctl = snd_rawmidi_ioctl, | |
1419 | .compat_ioctl = snd_rawmidi_ioctl_compat, | |
1420 | }; | |
1421 | ||
48c9d417 TI |
1422 | static int snd_rawmidi_alloc_substreams(struct snd_rawmidi *rmidi, |
1423 | struct snd_rawmidi_str *stream, | |
1da177e4 LT |
1424 | int direction, |
1425 | int count) | |
1426 | { | |
48c9d417 | 1427 | struct snd_rawmidi_substream *substream; |
1da177e4 LT |
1428 | int idx; |
1429 | ||
1da177e4 | 1430 | for (idx = 0; idx < count; idx++) { |
ca2c0966 | 1431 | substream = kzalloc(sizeof(*substream), GFP_KERNEL); |
ec0e9937 | 1432 | if (!substream) |
1da177e4 LT |
1433 | return -ENOMEM; |
1434 | substream->stream = direction; | |
1435 | substream->number = idx; | |
1436 | substream->rmidi = rmidi; | |
1437 | substream->pstr = stream; | |
1438 | list_add_tail(&substream->list, &stream->substreams); | |
1439 | stream->substream_count++; | |
1440 | } | |
1441 | return 0; | |
1442 | } | |
1443 | ||
aee5012f TI |
1444 | static void release_rawmidi_device(struct device *dev) |
1445 | { | |
1446 | kfree(container_of(dev, struct snd_rawmidi, dev)); | |
1447 | } | |
1448 | ||
1da177e4 LT |
1449 | /** |
1450 | * snd_rawmidi_new - create a rawmidi instance | |
1451 | * @card: the card instance | |
1452 | * @id: the id string | |
1453 | * @device: the device index | |
1454 | * @output_count: the number of output streams | |
1455 | * @input_count: the number of input streams | |
1456 | * @rrawmidi: the pointer to store the new rawmidi instance | |
1457 | * | |
1458 | * Creates a new rawmidi instance. | |
1459 | * Use snd_rawmidi_set_ops() to set the operators to the new instance. | |
1460 | * | |
eb7c06e8 | 1461 | * Return: Zero if successful, or a negative error code on failure. |
1da177e4 | 1462 | */ |
48c9d417 | 1463 | int snd_rawmidi_new(struct snd_card *card, char *id, int device, |
1da177e4 | 1464 | int output_count, int input_count, |
48c9d417 | 1465 | struct snd_rawmidi ** rrawmidi) |
1da177e4 | 1466 | { |
48c9d417 | 1467 | struct snd_rawmidi *rmidi; |
1da177e4 | 1468 | int err; |
48c9d417 | 1469 | static struct snd_device_ops ops = { |
1da177e4 LT |
1470 | .dev_free = snd_rawmidi_dev_free, |
1471 | .dev_register = snd_rawmidi_dev_register, | |
1472 | .dev_disconnect = snd_rawmidi_dev_disconnect, | |
1da177e4 LT |
1473 | }; |
1474 | ||
7eaa943c TI |
1475 | if (snd_BUG_ON(!card)) |
1476 | return -ENXIO; | |
1477 | if (rrawmidi) | |
1478 | *rrawmidi = NULL; | |
ca2c0966 | 1479 | rmidi = kzalloc(sizeof(*rmidi), GFP_KERNEL); |
ec0e9937 | 1480 | if (!rmidi) |
1da177e4 LT |
1481 | return -ENOMEM; |
1482 | rmidi->card = card; | |
1483 | rmidi->device = device; | |
1a60d4c5 | 1484 | mutex_init(&rmidi->open_mutex); |
1da177e4 | 1485 | init_waitqueue_head(&rmidi->open_wait); |
c13893d7 AM |
1486 | INIT_LIST_HEAD(&rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substreams); |
1487 | INIT_LIST_HEAD(&rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substreams); | |
1488 | ||
1da177e4 LT |
1489 | if (id != NULL) |
1490 | strlcpy(rmidi->id, id, sizeof(rmidi->id)); | |
aee5012f TI |
1491 | |
1492 | snd_device_initialize(&rmidi->dev, card); | |
1493 | rmidi->dev.release = release_rawmidi_device; | |
1494 | dev_set_name(&rmidi->dev, "midiC%iD%i", card->number, device); | |
1495 | ||
73e77ba0 TI |
1496 | if ((err = snd_rawmidi_alloc_substreams(rmidi, |
1497 | &rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT], | |
1498 | SNDRV_RAWMIDI_STREAM_INPUT, | |
1499 | input_count)) < 0) { | |
1da177e4 LT |
1500 | snd_rawmidi_free(rmidi); |
1501 | return err; | |
1502 | } | |
73e77ba0 TI |
1503 | if ((err = snd_rawmidi_alloc_substreams(rmidi, |
1504 | &rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT], | |
1505 | SNDRV_RAWMIDI_STREAM_OUTPUT, | |
1506 | output_count)) < 0) { | |
1da177e4 LT |
1507 | snd_rawmidi_free(rmidi); |
1508 | return err; | |
1509 | } | |
1510 | if ((err = snd_device_new(card, SNDRV_DEV_RAWMIDI, rmidi, &ops)) < 0) { | |
1511 | snd_rawmidi_free(rmidi); | |
1512 | return err; | |
1513 | } | |
7eaa943c TI |
1514 | if (rrawmidi) |
1515 | *rrawmidi = rmidi; | |
1da177e4 LT |
1516 | return 0; |
1517 | } | |
6776a5d7 | 1518 | EXPORT_SYMBOL(snd_rawmidi_new); |
1da177e4 | 1519 | |
48c9d417 | 1520 | static void snd_rawmidi_free_substreams(struct snd_rawmidi_str *stream) |
1da177e4 | 1521 | { |
48c9d417 | 1522 | struct snd_rawmidi_substream *substream; |
1da177e4 LT |
1523 | |
1524 | while (!list_empty(&stream->substreams)) { | |
48c9d417 | 1525 | substream = list_entry(stream->substreams.next, struct snd_rawmidi_substream, list); |
1da177e4 LT |
1526 | list_del(&substream->list); |
1527 | kfree(substream); | |
1528 | } | |
1529 | } | |
1530 | ||
48c9d417 | 1531 | static int snd_rawmidi_free(struct snd_rawmidi *rmidi) |
1da177e4 | 1532 | { |
7eaa943c TI |
1533 | if (!rmidi) |
1534 | return 0; | |
c461482c TI |
1535 | |
1536 | snd_info_free_entry(rmidi->proc_entry); | |
1537 | rmidi->proc_entry = NULL; | |
1538 | mutex_lock(®ister_mutex); | |
1539 | if (rmidi->ops && rmidi->ops->dev_unregister) | |
1540 | rmidi->ops->dev_unregister(rmidi); | |
1541 | mutex_unlock(®ister_mutex); | |
1542 | ||
1da177e4 LT |
1543 | snd_rawmidi_free_substreams(&rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT]); |
1544 | snd_rawmidi_free_substreams(&rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT]); | |
1545 | if (rmidi->private_free) | |
1546 | rmidi->private_free(rmidi); | |
aee5012f | 1547 | put_device(&rmidi->dev); |
1da177e4 LT |
1548 | return 0; |
1549 | } | |
1550 | ||
48c9d417 | 1551 | static int snd_rawmidi_dev_free(struct snd_device *device) |
1da177e4 | 1552 | { |
48c9d417 | 1553 | struct snd_rawmidi *rmidi = device->device_data; |
1da177e4 LT |
1554 | return snd_rawmidi_free(rmidi); |
1555 | } | |
1556 | ||
1557 | #if defined(CONFIG_SND_SEQUENCER) || (defined(MODULE) && defined(CONFIG_SND_SEQUENCER_MODULE)) | |
48c9d417 | 1558 | static void snd_rawmidi_dev_seq_free(struct snd_seq_device *device) |
1da177e4 | 1559 | { |
48c9d417 | 1560 | struct snd_rawmidi *rmidi = device->private_data; |
1da177e4 LT |
1561 | rmidi->seq_dev = NULL; |
1562 | } | |
1563 | #endif | |
1564 | ||
48c9d417 | 1565 | static int snd_rawmidi_dev_register(struct snd_device *device) |
1da177e4 | 1566 | { |
f87135f5 | 1567 | int err; |
48c9d417 | 1568 | struct snd_info_entry *entry; |
1da177e4 | 1569 | char name[16]; |
48c9d417 | 1570 | struct snd_rawmidi *rmidi = device->device_data; |
1da177e4 LT |
1571 | |
1572 | if (rmidi->device >= SNDRV_RAWMIDI_DEVICES) | |
1573 | return -ENOMEM; | |
1a60d4c5 | 1574 | mutex_lock(®ister_mutex); |
f87135f5 | 1575 | if (snd_rawmidi_search(rmidi->card, rmidi->device)) { |
1a60d4c5 | 1576 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
1577 | return -EBUSY; |
1578 | } | |
f87135f5 | 1579 | list_add_tail(&rmidi->list, &snd_rawmidi_devices); |
40a4b263 TI |
1580 | err = snd_register_device(SNDRV_DEVICE_TYPE_RAWMIDI, |
1581 | rmidi->card, rmidi->device, | |
1582 | &snd_rawmidi_f_ops, rmidi, &rmidi->dev); | |
aee5012f TI |
1583 | if (err < 0) { |
1584 | rmidi_err(rmidi, "unable to register\n"); | |
f87135f5 | 1585 | list_del(&rmidi->list); |
1a60d4c5 | 1586 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
1587 | return err; |
1588 | } | |
1589 | if (rmidi->ops && rmidi->ops->dev_register && | |
1590 | (err = rmidi->ops->dev_register(rmidi)) < 0) { | |
40a4b263 | 1591 | snd_unregister_device(&rmidi->dev); |
f87135f5 | 1592 | list_del(&rmidi->list); |
1a60d4c5 | 1593 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
1594 | return err; |
1595 | } | |
1596 | #ifdef CONFIG_SND_OSSEMUL | |
1597 | rmidi->ossreg = 0; | |
1598 | if ((int)rmidi->device == midi_map[rmidi->card->number]) { | |
1599 | if (snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_MIDI, | |
f87135f5 | 1600 | rmidi->card, 0, &snd_rawmidi_f_ops, |
80d7d771 | 1601 | rmidi) < 0) { |
ca20d292 TI |
1602 | rmidi_err(rmidi, |
1603 | "unable to register OSS rawmidi device %i:%i\n", | |
1604 | rmidi->card->number, 0); | |
1da177e4 LT |
1605 | } else { |
1606 | rmidi->ossreg++; | |
1607 | #ifdef SNDRV_OSS_INFO_DEV_MIDI | |
1608 | snd_oss_info_register(SNDRV_OSS_INFO_DEV_MIDI, rmidi->card->number, rmidi->name); | |
1609 | #endif | |
1610 | } | |
1611 | } | |
1612 | if ((int)rmidi->device == amidi_map[rmidi->card->number]) { | |
1613 | if (snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_MIDI, | |
f87135f5 | 1614 | rmidi->card, 1, &snd_rawmidi_f_ops, |
80d7d771 | 1615 | rmidi) < 0) { |
ca20d292 TI |
1616 | rmidi_err(rmidi, |
1617 | "unable to register OSS rawmidi device %i:%i\n", | |
1618 | rmidi->card->number, 1); | |
1da177e4 LT |
1619 | } else { |
1620 | rmidi->ossreg++; | |
1621 | } | |
1622 | } | |
1623 | #endif /* CONFIG_SND_OSSEMUL */ | |
1a60d4c5 | 1624 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
1625 | sprintf(name, "midi%d", rmidi->device); |
1626 | entry = snd_info_create_card_entry(rmidi->card, name, rmidi->card->proc_root); | |
1627 | if (entry) { | |
1628 | entry->private_data = rmidi; | |
1da177e4 LT |
1629 | entry->c.text.read = snd_rawmidi_proc_info_read; |
1630 | if (snd_info_register(entry) < 0) { | |
1631 | snd_info_free_entry(entry); | |
1632 | entry = NULL; | |
1633 | } | |
1634 | } | |
1635 | rmidi->proc_entry = entry; | |
1636 | #if defined(CONFIG_SND_SEQUENCER) || (defined(MODULE) && defined(CONFIG_SND_SEQUENCER_MODULE)) | |
1637 | if (!rmidi->ops || !rmidi->ops->dev_register) { /* own registration mechanism */ | |
1638 | if (snd_seq_device_new(rmidi->card, rmidi->device, SNDRV_SEQ_DEV_ID_MIDISYNTH, 0, &rmidi->seq_dev) >= 0) { | |
1639 | rmidi->seq_dev->private_data = rmidi; | |
1640 | rmidi->seq_dev->private_free = snd_rawmidi_dev_seq_free; | |
1641 | sprintf(rmidi->seq_dev->name, "MIDI %d-%d", rmidi->card->number, rmidi->device); | |
1642 | snd_device_register(rmidi->card, rmidi->seq_dev); | |
1643 | } | |
1644 | } | |
1645 | #endif | |
1646 | return 0; | |
1647 | } | |
1648 | ||
48c9d417 | 1649 | static int snd_rawmidi_dev_disconnect(struct snd_device *device) |
1da177e4 | 1650 | { |
48c9d417 | 1651 | struct snd_rawmidi *rmidi = device->device_data; |
0914f796 | 1652 | int dir; |
1da177e4 | 1653 | |
1a60d4c5 | 1654 | mutex_lock(®ister_mutex); |
0914f796 TI |
1655 | mutex_lock(&rmidi->open_mutex); |
1656 | wake_up(&rmidi->open_wait); | |
f87135f5 | 1657 | list_del_init(&rmidi->list); |
0914f796 TI |
1658 | for (dir = 0; dir < 2; dir++) { |
1659 | struct snd_rawmidi_substream *s; | |
1660 | list_for_each_entry(s, &rmidi->streams[dir].substreams, list) { | |
1661 | if (s->runtime) | |
1662 | wake_up(&s->runtime->sleep); | |
1663 | } | |
1664 | } | |
1665 | ||
1da177e4 LT |
1666 | #ifdef CONFIG_SND_OSSEMUL |
1667 | if (rmidi->ossreg) { | |
1668 | if ((int)rmidi->device == midi_map[rmidi->card->number]) { | |
1669 | snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_MIDI, rmidi->card, 0); | |
1670 | #ifdef SNDRV_OSS_INFO_DEV_MIDI | |
1671 | snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_MIDI, rmidi->card->number); | |
1672 | #endif | |
1673 | } | |
1674 | if ((int)rmidi->device == amidi_map[rmidi->card->number]) | |
1675 | snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_MIDI, rmidi->card, 1); | |
1676 | rmidi->ossreg = 0; | |
1677 | } | |
1678 | #endif /* CONFIG_SND_OSSEMUL */ | |
40a4b263 | 1679 | snd_unregister_device(&rmidi->dev); |
0914f796 | 1680 | mutex_unlock(&rmidi->open_mutex); |
1a60d4c5 | 1681 | mutex_unlock(®ister_mutex); |
c461482c | 1682 | return 0; |
1da177e4 LT |
1683 | } |
1684 | ||
1685 | /** | |
1686 | * snd_rawmidi_set_ops - set the rawmidi operators | |
1687 | * @rmidi: the rawmidi instance | |
1688 | * @stream: the stream direction, SNDRV_RAWMIDI_STREAM_XXX | |
1689 | * @ops: the operator table | |
1690 | * | |
1691 | * Sets the rawmidi operators for the given stream direction. | |
1692 | */ | |
48c9d417 TI |
1693 | void snd_rawmidi_set_ops(struct snd_rawmidi *rmidi, int stream, |
1694 | struct snd_rawmidi_ops *ops) | |
1da177e4 | 1695 | { |
48c9d417 | 1696 | struct snd_rawmidi_substream *substream; |
1da177e4 | 1697 | |
9244b2c3 | 1698 | list_for_each_entry(substream, &rmidi->streams[stream].substreams, list) |
1da177e4 | 1699 | substream->ops = ops; |
1da177e4 | 1700 | } |
6776a5d7 | 1701 | EXPORT_SYMBOL(snd_rawmidi_set_ops); |
1da177e4 LT |
1702 | |
1703 | /* | |
1704 | * ENTRY functions | |
1705 | */ | |
1706 | ||
1707 | static int __init alsa_rawmidi_init(void) | |
1708 | { | |
1709 | ||
1710 | snd_ctl_register_ioctl(snd_rawmidi_control_ioctl); | |
1711 | snd_ctl_register_ioctl_compat(snd_rawmidi_control_ioctl); | |
1712 | #ifdef CONFIG_SND_OSSEMUL | |
1713 | { int i; | |
1714 | /* check device map table */ | |
1715 | for (i = 0; i < SNDRV_CARDS; i++) { | |
1716 | if (midi_map[i] < 0 || midi_map[i] >= SNDRV_RAWMIDI_DEVICES) { | |
ca20d292 TI |
1717 | pr_err("ALSA: rawmidi: invalid midi_map[%d] = %d\n", |
1718 | i, midi_map[i]); | |
1da177e4 LT |
1719 | midi_map[i] = 0; |
1720 | } | |
1721 | if (amidi_map[i] < 0 || amidi_map[i] >= SNDRV_RAWMIDI_DEVICES) { | |
ca20d292 TI |
1722 | pr_err("ALSA: rawmidi: invalid amidi_map[%d] = %d\n", |
1723 | i, amidi_map[i]); | |
1da177e4 LT |
1724 | amidi_map[i] = 1; |
1725 | } | |
1726 | } | |
1727 | } | |
1728 | #endif /* CONFIG_SND_OSSEMUL */ | |
1729 | return 0; | |
1730 | } | |
1731 | ||
1732 | static void __exit alsa_rawmidi_exit(void) | |
1733 | { | |
1734 | snd_ctl_unregister_ioctl(snd_rawmidi_control_ioctl); | |
1735 | snd_ctl_unregister_ioctl_compat(snd_rawmidi_control_ioctl); | |
1736 | } | |
1737 | ||
1738 | module_init(alsa_rawmidi_init) | |
1739 | module_exit(alsa_rawmidi_exit) |