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Commit | Line | Data |
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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> | |
174cd4b1 | 25 | #include <linux/sched/signal.h> |
1da177e4 LT |
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; |
ac6424b9 | 371 | wait_queue_entry_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 | ||
c1cfd902 TI |
582 | static int __snd_rawmidi_info_select(struct snd_card *card, |
583 | struct snd_rawmidi_info *info) | |
1da177e4 | 584 | { |
48c9d417 TI |
585 | struct snd_rawmidi *rmidi; |
586 | struct snd_rawmidi_str *pstr; | |
587 | struct snd_rawmidi_substream *substream; | |
f87135f5 | 588 | |
f87135f5 | 589 | rmidi = snd_rawmidi_search(card, info->device); |
a106cd3d CL |
590 | if (!rmidi) |
591 | return -ENXIO; | |
1da177e4 LT |
592 | if (info->stream < 0 || info->stream > 1) |
593 | return -EINVAL; | |
594 | pstr = &rmidi->streams[info->stream]; | |
595 | if (pstr->substream_count == 0) | |
596 | return -ENOENT; | |
597 | if (info->subdevice >= pstr->substream_count) | |
598 | return -ENXIO; | |
9244b2c3 | 599 | list_for_each_entry(substream, &pstr->substreams, list) { |
1da177e4 LT |
600 | if ((unsigned int)substream->number == info->subdevice) |
601 | return snd_rawmidi_info(substream, info); | |
602 | } | |
603 | return -ENXIO; | |
604 | } | |
c1cfd902 TI |
605 | |
606 | int snd_rawmidi_info_select(struct snd_card *card, struct snd_rawmidi_info *info) | |
607 | { | |
608 | int ret; | |
609 | ||
610 | mutex_lock(®ister_mutex); | |
611 | ret = __snd_rawmidi_info_select(card, info); | |
612 | mutex_unlock(®ister_mutex); | |
613 | return ret; | |
614 | } | |
6776a5d7 | 615 | EXPORT_SYMBOL(snd_rawmidi_info_select); |
1da177e4 | 616 | |
48c9d417 TI |
617 | static int snd_rawmidi_info_select_user(struct snd_card *card, |
618 | struct snd_rawmidi_info __user *_info) | |
1da177e4 LT |
619 | { |
620 | int err; | |
48c9d417 | 621 | struct snd_rawmidi_info info; |
1da177e4 LT |
622 | if (get_user(info.device, &_info->device)) |
623 | return -EFAULT; | |
624 | if (get_user(info.stream, &_info->stream)) | |
625 | return -EFAULT; | |
626 | if (get_user(info.subdevice, &_info->subdevice)) | |
627 | return -EFAULT; | |
628 | if ((err = snd_rawmidi_info_select(card, &info)) < 0) | |
629 | return err; | |
48c9d417 | 630 | if (copy_to_user(_info, &info, sizeof(struct snd_rawmidi_info))) |
1da177e4 LT |
631 | return -EFAULT; |
632 | return 0; | |
633 | } | |
634 | ||
48c9d417 TI |
635 | int snd_rawmidi_output_params(struct snd_rawmidi_substream *substream, |
636 | struct snd_rawmidi_params * params) | |
1da177e4 LT |
637 | { |
638 | char *newbuf; | |
48c9d417 | 639 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
1da177e4 LT |
640 | |
641 | if (substream->append && substream->use_count > 1) | |
642 | return -EBUSY; | |
643 | snd_rawmidi_drain_output(substream); | |
644 | if (params->buffer_size < 32 || params->buffer_size > 1024L * 1024L) { | |
645 | return -EINVAL; | |
646 | } | |
647 | if (params->avail_min < 1 || params->avail_min > params->buffer_size) { | |
648 | return -EINVAL; | |
649 | } | |
650 | if (params->buffer_size != runtime->buffer_size) { | |
3101ba03 TI |
651 | newbuf = krealloc(runtime->buffer, params->buffer_size, |
652 | GFP_KERNEL); | |
4fa95ef6 | 653 | if (!newbuf) |
1da177e4 | 654 | return -ENOMEM; |
1da177e4 LT |
655 | runtime->buffer = newbuf; |
656 | runtime->buffer_size = params->buffer_size; | |
1b98ea47 | 657 | runtime->avail = runtime->buffer_size; |
1da177e4 LT |
658 | } |
659 | runtime->avail_min = params->avail_min; | |
660 | substream->active_sensing = !params->no_active_sensing; | |
661 | return 0; | |
662 | } | |
6776a5d7 | 663 | EXPORT_SYMBOL(snd_rawmidi_output_params); |
1da177e4 | 664 | |
48c9d417 TI |
665 | int snd_rawmidi_input_params(struct snd_rawmidi_substream *substream, |
666 | struct snd_rawmidi_params * params) | |
1da177e4 LT |
667 | { |
668 | char *newbuf; | |
48c9d417 | 669 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
1da177e4 LT |
670 | |
671 | snd_rawmidi_drain_input(substream); | |
672 | if (params->buffer_size < 32 || params->buffer_size > 1024L * 1024L) { | |
673 | return -EINVAL; | |
674 | } | |
675 | if (params->avail_min < 1 || params->avail_min > params->buffer_size) { | |
676 | return -EINVAL; | |
677 | } | |
678 | if (params->buffer_size != runtime->buffer_size) { | |
3101ba03 TI |
679 | newbuf = krealloc(runtime->buffer, params->buffer_size, |
680 | GFP_KERNEL); | |
4fa95ef6 | 681 | if (!newbuf) |
1da177e4 | 682 | return -ENOMEM; |
1da177e4 LT |
683 | runtime->buffer = newbuf; |
684 | runtime->buffer_size = params->buffer_size; | |
685 | } | |
686 | runtime->avail_min = params->avail_min; | |
687 | return 0; | |
688 | } | |
6776a5d7 | 689 | EXPORT_SYMBOL(snd_rawmidi_input_params); |
1da177e4 | 690 | |
48c9d417 TI |
691 | static int snd_rawmidi_output_status(struct snd_rawmidi_substream *substream, |
692 | struct snd_rawmidi_status * status) | |
1da177e4 | 693 | { |
48c9d417 | 694 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
1da177e4 LT |
695 | |
696 | memset(status, 0, sizeof(*status)); | |
697 | status->stream = SNDRV_RAWMIDI_STREAM_OUTPUT; | |
698 | spin_lock_irq(&runtime->lock); | |
699 | status->avail = runtime->avail; | |
700 | spin_unlock_irq(&runtime->lock); | |
701 | return 0; | |
702 | } | |
703 | ||
48c9d417 TI |
704 | static int snd_rawmidi_input_status(struct snd_rawmidi_substream *substream, |
705 | struct snd_rawmidi_status * status) | |
1da177e4 | 706 | { |
48c9d417 | 707 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
1da177e4 LT |
708 | |
709 | memset(status, 0, sizeof(*status)); | |
710 | status->stream = SNDRV_RAWMIDI_STREAM_INPUT; | |
711 | spin_lock_irq(&runtime->lock); | |
712 | status->avail = runtime->avail; | |
713 | status->xruns = runtime->xruns; | |
714 | runtime->xruns = 0; | |
715 | spin_unlock_irq(&runtime->lock); | |
716 | return 0; | |
717 | } | |
718 | ||
719 | static long snd_rawmidi_ioctl(struct file *file, unsigned int cmd, unsigned long arg) | |
720 | { | |
48c9d417 | 721 | struct snd_rawmidi_file *rfile; |
1da177e4 LT |
722 | void __user *argp = (void __user *)arg; |
723 | ||
724 | rfile = file->private_data; | |
725 | if (((cmd >> 8) & 0xff) != 'W') | |
726 | return -ENOTTY; | |
727 | switch (cmd) { | |
728 | case SNDRV_RAWMIDI_IOCTL_PVERSION: | |
729 | return put_user(SNDRV_RAWMIDI_VERSION, (int __user *)argp) ? -EFAULT : 0; | |
730 | case SNDRV_RAWMIDI_IOCTL_INFO: | |
731 | { | |
48c9d417 TI |
732 | int stream; |
733 | struct snd_rawmidi_info __user *info = argp; | |
1da177e4 LT |
734 | if (get_user(stream, &info->stream)) |
735 | return -EFAULT; | |
736 | switch (stream) { | |
737 | case SNDRV_RAWMIDI_STREAM_INPUT: | |
738 | return snd_rawmidi_info_user(rfile->input, info); | |
739 | case SNDRV_RAWMIDI_STREAM_OUTPUT: | |
740 | return snd_rawmidi_info_user(rfile->output, info); | |
741 | default: | |
742 | return -EINVAL; | |
743 | } | |
744 | } | |
745 | case SNDRV_RAWMIDI_IOCTL_PARAMS: | |
746 | { | |
48c9d417 TI |
747 | struct snd_rawmidi_params params; |
748 | if (copy_from_user(¶ms, argp, sizeof(struct snd_rawmidi_params))) | |
1da177e4 LT |
749 | return -EFAULT; |
750 | switch (params.stream) { | |
751 | case SNDRV_RAWMIDI_STREAM_OUTPUT: | |
752 | if (rfile->output == NULL) | |
753 | return -EINVAL; | |
754 | return snd_rawmidi_output_params(rfile->output, ¶ms); | |
755 | case SNDRV_RAWMIDI_STREAM_INPUT: | |
756 | if (rfile->input == NULL) | |
757 | return -EINVAL; | |
758 | return snd_rawmidi_input_params(rfile->input, ¶ms); | |
759 | default: | |
760 | return -EINVAL; | |
761 | } | |
762 | } | |
763 | case SNDRV_RAWMIDI_IOCTL_STATUS: | |
764 | { | |
765 | int err = 0; | |
48c9d417 TI |
766 | struct snd_rawmidi_status status; |
767 | if (copy_from_user(&status, argp, sizeof(struct snd_rawmidi_status))) | |
1da177e4 LT |
768 | return -EFAULT; |
769 | switch (status.stream) { | |
770 | case SNDRV_RAWMIDI_STREAM_OUTPUT: | |
771 | if (rfile->output == NULL) | |
772 | return -EINVAL; | |
773 | err = snd_rawmidi_output_status(rfile->output, &status); | |
774 | break; | |
775 | case SNDRV_RAWMIDI_STREAM_INPUT: | |
776 | if (rfile->input == NULL) | |
777 | return -EINVAL; | |
778 | err = snd_rawmidi_input_status(rfile->input, &status); | |
779 | break; | |
780 | default: | |
781 | return -EINVAL; | |
782 | } | |
783 | if (err < 0) | |
784 | return err; | |
48c9d417 | 785 | if (copy_to_user(argp, &status, sizeof(struct snd_rawmidi_status))) |
1da177e4 LT |
786 | return -EFAULT; |
787 | return 0; | |
788 | } | |
789 | case SNDRV_RAWMIDI_IOCTL_DROP: | |
790 | { | |
791 | int val; | |
792 | if (get_user(val, (int __user *) argp)) | |
793 | return -EFAULT; | |
794 | switch (val) { | |
795 | case SNDRV_RAWMIDI_STREAM_OUTPUT: | |
796 | if (rfile->output == NULL) | |
797 | return -EINVAL; | |
798 | return snd_rawmidi_drop_output(rfile->output); | |
799 | default: | |
800 | return -EINVAL; | |
801 | } | |
802 | } | |
803 | case SNDRV_RAWMIDI_IOCTL_DRAIN: | |
804 | { | |
805 | int val; | |
806 | if (get_user(val, (int __user *) argp)) | |
807 | return -EFAULT; | |
808 | switch (val) { | |
809 | case SNDRV_RAWMIDI_STREAM_OUTPUT: | |
810 | if (rfile->output == NULL) | |
811 | return -EINVAL; | |
812 | return snd_rawmidi_drain_output(rfile->output); | |
813 | case SNDRV_RAWMIDI_STREAM_INPUT: | |
814 | if (rfile->input == NULL) | |
815 | return -EINVAL; | |
816 | return snd_rawmidi_drain_input(rfile->input); | |
817 | default: | |
818 | return -EINVAL; | |
819 | } | |
820 | } | |
1da177e4 | 821 | default: |
ca20d292 TI |
822 | rmidi_dbg(rfile->rmidi, |
823 | "rawmidi: unknown command = 0x%x\n", cmd); | |
1da177e4 LT |
824 | } |
825 | return -ENOTTY; | |
826 | } | |
827 | ||
48c9d417 TI |
828 | static int snd_rawmidi_control_ioctl(struct snd_card *card, |
829 | struct snd_ctl_file *control, | |
1da177e4 LT |
830 | unsigned int cmd, |
831 | unsigned long arg) | |
832 | { | |
833 | void __user *argp = (void __user *)arg; | |
1da177e4 | 834 | |
1da177e4 LT |
835 | switch (cmd) { |
836 | case SNDRV_CTL_IOCTL_RAWMIDI_NEXT_DEVICE: | |
837 | { | |
838 | int device; | |
839 | ||
840 | if (get_user(device, (int __user *)argp)) | |
841 | return -EFAULT; | |
a7a13d06 DC |
842 | if (device >= SNDRV_RAWMIDI_DEVICES) /* next device is -1 */ |
843 | device = SNDRV_RAWMIDI_DEVICES - 1; | |
1a60d4c5 | 844 | mutex_lock(®ister_mutex); |
1da177e4 LT |
845 | device = device < 0 ? 0 : device + 1; |
846 | while (device < SNDRV_RAWMIDI_DEVICES) { | |
f87135f5 | 847 | if (snd_rawmidi_search(card, device)) |
1da177e4 LT |
848 | break; |
849 | device++; | |
850 | } | |
851 | if (device == SNDRV_RAWMIDI_DEVICES) | |
852 | device = -1; | |
1a60d4c5 | 853 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
854 | if (put_user(device, (int __user *)argp)) |
855 | return -EFAULT; | |
856 | return 0; | |
857 | } | |
858 | case SNDRV_CTL_IOCTL_RAWMIDI_PREFER_SUBDEVICE: | |
859 | { | |
860 | int val; | |
861 | ||
862 | if (get_user(val, (int __user *)argp)) | |
863 | return -EFAULT; | |
23c18d4b | 864 | control->preferred_subdevice[SND_CTL_SUBDEV_RAWMIDI] = val; |
1da177e4 LT |
865 | return 0; |
866 | } | |
867 | case SNDRV_CTL_IOCTL_RAWMIDI_INFO: | |
868 | return snd_rawmidi_info_select_user(card, argp); | |
869 | } | |
870 | return -ENOIOCTLCMD; | |
871 | } | |
872 | ||
873 | /** | |
874 | * snd_rawmidi_receive - receive the input data from the device | |
875 | * @substream: the rawmidi substream | |
876 | * @buffer: the buffer pointer | |
877 | * @count: the data size to read | |
878 | * | |
879 | * Reads the data from the internal buffer. | |
880 | * | |
eb7c06e8 | 881 | * Return: The size of read data, or a negative error code on failure. |
1da177e4 | 882 | */ |
48c9d417 TI |
883 | int snd_rawmidi_receive(struct snd_rawmidi_substream *substream, |
884 | const unsigned char *buffer, int count) | |
1da177e4 LT |
885 | { |
886 | unsigned long flags; | |
887 | int result = 0, count1; | |
48c9d417 | 888 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
1da177e4 | 889 | |
219df32f TI |
890 | if (!substream->opened) |
891 | return -EBADFD; | |
1da177e4 | 892 | if (runtime->buffer == NULL) { |
ca20d292 TI |
893 | rmidi_dbg(substream->rmidi, |
894 | "snd_rawmidi_receive: input is not active!!!\n"); | |
1da177e4 LT |
895 | return -EINVAL; |
896 | } | |
897 | spin_lock_irqsave(&runtime->lock, flags); | |
898 | if (count == 1) { /* special case, faster code */ | |
899 | substream->bytes++; | |
900 | if (runtime->avail < runtime->buffer_size) { | |
901 | runtime->buffer[runtime->hw_ptr++] = buffer[0]; | |
902 | runtime->hw_ptr %= runtime->buffer_size; | |
903 | runtime->avail++; | |
904 | result++; | |
905 | } else { | |
906 | runtime->xruns++; | |
907 | } | |
908 | } else { | |
909 | substream->bytes += count; | |
910 | count1 = runtime->buffer_size - runtime->hw_ptr; | |
911 | if (count1 > count) | |
912 | count1 = count; | |
913 | if (count1 > (int)(runtime->buffer_size - runtime->avail)) | |
914 | count1 = runtime->buffer_size - runtime->avail; | |
915 | memcpy(runtime->buffer + runtime->hw_ptr, buffer, count1); | |
916 | runtime->hw_ptr += count1; | |
917 | runtime->hw_ptr %= runtime->buffer_size; | |
918 | runtime->avail += count1; | |
919 | count -= count1; | |
920 | result += count1; | |
921 | if (count > 0) { | |
922 | buffer += count1; | |
923 | count1 = count; | |
924 | if (count1 > (int)(runtime->buffer_size - runtime->avail)) { | |
925 | count1 = runtime->buffer_size - runtime->avail; | |
926 | runtime->xruns += count - count1; | |
927 | } | |
928 | if (count1 > 0) { | |
929 | memcpy(runtime->buffer, buffer, count1); | |
930 | runtime->hw_ptr = count1; | |
931 | runtime->avail += count1; | |
932 | result += count1; | |
933 | } | |
934 | } | |
935 | } | |
936 | if (result > 0) { | |
937 | if (runtime->event) | |
b3c705aa | 938 | schedule_work(&runtime->event_work); |
1da177e4 LT |
939 | else if (snd_rawmidi_ready(substream)) |
940 | wake_up(&runtime->sleep); | |
941 | } | |
942 | spin_unlock_irqrestore(&runtime->lock, flags); | |
943 | return result; | |
944 | } | |
6776a5d7 | 945 | EXPORT_SYMBOL(snd_rawmidi_receive); |
1da177e4 | 946 | |
48c9d417 | 947 | static long snd_rawmidi_kernel_read1(struct snd_rawmidi_substream *substream, |
17596a80 MÅš |
948 | unsigned char __user *userbuf, |
949 | unsigned char *kernelbuf, long count) | |
1da177e4 LT |
950 | { |
951 | unsigned long flags; | |
952 | long result = 0, count1; | |
48c9d417 | 953 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
81f57754 | 954 | unsigned long appl_ptr; |
1da177e4 | 955 | |
81f57754 | 956 | spin_lock_irqsave(&runtime->lock, flags); |
1da177e4 LT |
957 | while (count > 0 && runtime->avail) { |
958 | count1 = runtime->buffer_size - runtime->appl_ptr; | |
959 | if (count1 > count) | |
960 | count1 = count; | |
1da177e4 LT |
961 | if (count1 > (int)runtime->avail) |
962 | count1 = runtime->avail; | |
81f57754 TI |
963 | |
964 | /* update runtime->appl_ptr before unlocking for userbuf */ | |
965 | appl_ptr = runtime->appl_ptr; | |
966 | runtime->appl_ptr += count1; | |
967 | runtime->appl_ptr %= runtime->buffer_size; | |
968 | runtime->avail -= count1; | |
969 | ||
17596a80 | 970 | if (kernelbuf) |
81f57754 | 971 | memcpy(kernelbuf + result, runtime->buffer + appl_ptr, count1); |
17596a80 | 972 | if (userbuf) { |
1da177e4 | 973 | spin_unlock_irqrestore(&runtime->lock, flags); |
17596a80 | 974 | if (copy_to_user(userbuf + result, |
81f57754 | 975 | runtime->buffer + appl_ptr, count1)) { |
1da177e4 LT |
976 | return result > 0 ? result : -EFAULT; |
977 | } | |
978 | spin_lock_irqsave(&runtime->lock, flags); | |
979 | } | |
1da177e4 LT |
980 | result += count1; |
981 | count -= count1; | |
982 | } | |
81f57754 | 983 | spin_unlock_irqrestore(&runtime->lock, flags); |
1da177e4 LT |
984 | return result; |
985 | } | |
986 | ||
48c9d417 TI |
987 | long snd_rawmidi_kernel_read(struct snd_rawmidi_substream *substream, |
988 | unsigned char *buf, long count) | |
1da177e4 LT |
989 | { |
990 | snd_rawmidi_input_trigger(substream, 1); | |
17596a80 | 991 | return snd_rawmidi_kernel_read1(substream, NULL/*userbuf*/, buf, count); |
1da177e4 | 992 | } |
6776a5d7 | 993 | EXPORT_SYMBOL(snd_rawmidi_kernel_read); |
1da177e4 | 994 | |
48c9d417 TI |
995 | static ssize_t snd_rawmidi_read(struct file *file, char __user *buf, size_t count, |
996 | loff_t *offset) | |
1da177e4 LT |
997 | { |
998 | long result; | |
999 | int count1; | |
48c9d417 TI |
1000 | struct snd_rawmidi_file *rfile; |
1001 | struct snd_rawmidi_substream *substream; | |
1002 | struct snd_rawmidi_runtime *runtime; | |
1da177e4 LT |
1003 | |
1004 | rfile = file->private_data; | |
1005 | substream = rfile->input; | |
1006 | if (substream == NULL) | |
1007 | return -EIO; | |
1008 | runtime = substream->runtime; | |
1009 | snd_rawmidi_input_trigger(substream, 1); | |
1010 | result = 0; | |
1011 | while (count > 0) { | |
1012 | spin_lock_irq(&runtime->lock); | |
1013 | while (!snd_rawmidi_ready(substream)) { | |
ac6424b9 | 1014 | wait_queue_entry_t wait; |
1da177e4 LT |
1015 | if ((file->f_flags & O_NONBLOCK) != 0 || result > 0) { |
1016 | spin_unlock_irq(&runtime->lock); | |
1017 | return result > 0 ? result : -EAGAIN; | |
1018 | } | |
1019 | init_waitqueue_entry(&wait, current); | |
1020 | add_wait_queue(&runtime->sleep, &wait); | |
1021 | set_current_state(TASK_INTERRUPTIBLE); | |
1022 | spin_unlock_irq(&runtime->lock); | |
1023 | schedule(); | |
1024 | remove_wait_queue(&runtime->sleep, &wait); | |
0914f796 TI |
1025 | if (rfile->rmidi->card->shutdown) |
1026 | return -ENODEV; | |
1da177e4 LT |
1027 | if (signal_pending(current)) |
1028 | return result > 0 ? result : -ERESTARTSYS; | |
1029 | if (!runtime->avail) | |
1030 | return result > 0 ? result : -EIO; | |
1031 | spin_lock_irq(&runtime->lock); | |
1032 | } | |
1033 | spin_unlock_irq(&runtime->lock); | |
4d23359b | 1034 | count1 = snd_rawmidi_kernel_read1(substream, |
17596a80 MÅš |
1035 | (unsigned char __user *)buf, |
1036 | NULL/*kernelbuf*/, | |
1037 | count); | |
1da177e4 LT |
1038 | if (count1 < 0) |
1039 | return result > 0 ? result : count1; | |
1040 | result += count1; | |
1041 | buf += count1; | |
1042 | count -= count1; | |
1043 | } | |
1044 | return result; | |
1045 | } | |
1046 | ||
1047 | /** | |
1048 | * snd_rawmidi_transmit_empty - check whether the output buffer is empty | |
1049 | * @substream: the rawmidi substream | |
eb7c06e8 YB |
1050 | * |
1051 | * Return: 1 if the internal output buffer is empty, 0 if not. | |
1da177e4 | 1052 | */ |
48c9d417 | 1053 | int snd_rawmidi_transmit_empty(struct snd_rawmidi_substream *substream) |
1da177e4 | 1054 | { |
48c9d417 | 1055 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
1da177e4 LT |
1056 | int result; |
1057 | unsigned long flags; | |
1058 | ||
1059 | if (runtime->buffer == NULL) { | |
ca20d292 TI |
1060 | rmidi_dbg(substream->rmidi, |
1061 | "snd_rawmidi_transmit_empty: output is not active!!!\n"); | |
1da177e4 LT |
1062 | return 1; |
1063 | } | |
1064 | spin_lock_irqsave(&runtime->lock, flags); | |
1065 | result = runtime->avail >= runtime->buffer_size; | |
1066 | spin_unlock_irqrestore(&runtime->lock, flags); | |
1067 | return result; | |
1068 | } | |
6776a5d7 | 1069 | EXPORT_SYMBOL(snd_rawmidi_transmit_empty); |
1da177e4 LT |
1070 | |
1071 | /** | |
06ab3003 | 1072 | * __snd_rawmidi_transmit_peek - copy data from the internal buffer |
1da177e4 LT |
1073 | * @substream: the rawmidi substream |
1074 | * @buffer: the buffer pointer | |
1075 | * @count: data size to transfer | |
1076 | * | |
06ab3003 | 1077 | * This is a variant of snd_rawmidi_transmit_peek() without spinlock. |
1da177e4 | 1078 | */ |
06ab3003 | 1079 | int __snd_rawmidi_transmit_peek(struct snd_rawmidi_substream *substream, |
48c9d417 | 1080 | unsigned char *buffer, int count) |
1da177e4 | 1081 | { |
1da177e4 | 1082 | int result, count1; |
48c9d417 | 1083 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
1da177e4 LT |
1084 | |
1085 | if (runtime->buffer == NULL) { | |
ca20d292 TI |
1086 | rmidi_dbg(substream->rmidi, |
1087 | "snd_rawmidi_transmit_peek: output is not active!!!\n"); | |
1da177e4 LT |
1088 | return -EINVAL; |
1089 | } | |
1090 | result = 0; | |
1da177e4 LT |
1091 | if (runtime->avail >= runtime->buffer_size) { |
1092 | /* warning: lowlevel layer MUST trigger down the hardware */ | |
1093 | goto __skip; | |
1094 | } | |
1095 | if (count == 1) { /* special case, faster code */ | |
1096 | *buffer = runtime->buffer[runtime->hw_ptr]; | |
1097 | result++; | |
1098 | } else { | |
1099 | count1 = runtime->buffer_size - runtime->hw_ptr; | |
1100 | if (count1 > count) | |
1101 | count1 = count; | |
1102 | if (count1 > (int)(runtime->buffer_size - runtime->avail)) | |
1103 | count1 = runtime->buffer_size - runtime->avail; | |
1104 | memcpy(buffer, runtime->buffer + runtime->hw_ptr, count1); | |
1105 | count -= count1; | |
1106 | result += count1; | |
1107 | if (count > 0) { | |
1108 | if (count > (int)(runtime->buffer_size - runtime->avail - count1)) | |
1109 | count = runtime->buffer_size - runtime->avail - count1; | |
1110 | memcpy(buffer + count1, runtime->buffer, count); | |
1111 | result += count; | |
1112 | } | |
1113 | } | |
1114 | __skip: | |
06ab3003 TI |
1115 | return result; |
1116 | } | |
1117 | EXPORT_SYMBOL(__snd_rawmidi_transmit_peek); | |
1118 | ||
1119 | /** | |
1120 | * snd_rawmidi_transmit_peek - copy data from the internal buffer | |
1121 | * @substream: the rawmidi substream | |
1122 | * @buffer: the buffer pointer | |
1123 | * @count: data size to transfer | |
1124 | * | |
1125 | * Copies data from the internal output buffer to the given buffer. | |
1126 | * | |
1127 | * Call this in the interrupt handler when the midi output is ready, | |
1128 | * and call snd_rawmidi_transmit_ack() after the transmission is | |
1129 | * finished. | |
1130 | * | |
1131 | * Return: The size of copied data, or a negative error code on failure. | |
1132 | */ | |
1133 | int snd_rawmidi_transmit_peek(struct snd_rawmidi_substream *substream, | |
1134 | unsigned char *buffer, int count) | |
1135 | { | |
1136 | struct snd_rawmidi_runtime *runtime = substream->runtime; | |
1137 | int result; | |
1138 | unsigned long flags; | |
1139 | ||
1140 | spin_lock_irqsave(&runtime->lock, flags); | |
1141 | result = __snd_rawmidi_transmit_peek(substream, buffer, count); | |
1da177e4 LT |
1142 | spin_unlock_irqrestore(&runtime->lock, flags); |
1143 | return result; | |
1144 | } | |
6776a5d7 | 1145 | EXPORT_SYMBOL(snd_rawmidi_transmit_peek); |
1da177e4 LT |
1146 | |
1147 | /** | |
06ab3003 | 1148 | * __snd_rawmidi_transmit_ack - acknowledge the transmission |
1da177e4 | 1149 | * @substream: the rawmidi substream |
0a11458c | 1150 | * @count: the transferred count |
1da177e4 | 1151 | * |
06ab3003 | 1152 | * This is a variant of __snd_rawmidi_transmit_ack() without spinlock. |
1da177e4 | 1153 | */ |
06ab3003 | 1154 | int __snd_rawmidi_transmit_ack(struct snd_rawmidi_substream *substream, int count) |
1da177e4 | 1155 | { |
48c9d417 | 1156 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
1da177e4 LT |
1157 | |
1158 | if (runtime->buffer == NULL) { | |
ca20d292 TI |
1159 | rmidi_dbg(substream->rmidi, |
1160 | "snd_rawmidi_transmit_ack: output is not active!!!\n"); | |
1da177e4 LT |
1161 | return -EINVAL; |
1162 | } | |
7eaa943c | 1163 | snd_BUG_ON(runtime->avail + count > runtime->buffer_size); |
1da177e4 LT |
1164 | runtime->hw_ptr += count; |
1165 | runtime->hw_ptr %= runtime->buffer_size; | |
1166 | runtime->avail += count; | |
1167 | substream->bytes += count; | |
1168 | if (count > 0) { | |
1169 | if (runtime->drain || snd_rawmidi_ready(substream)) | |
1170 | wake_up(&runtime->sleep); | |
1171 | } | |
1da177e4 LT |
1172 | return count; |
1173 | } | |
06ab3003 TI |
1174 | EXPORT_SYMBOL(__snd_rawmidi_transmit_ack); |
1175 | ||
1176 | /** | |
1177 | * snd_rawmidi_transmit_ack - acknowledge the transmission | |
1178 | * @substream: the rawmidi substream | |
1179 | * @count: the transferred count | |
1180 | * | |
1181 | * Advances the hardware pointer for the internal output buffer with | |
1182 | * the given size and updates the condition. | |
1183 | * Call after the transmission is finished. | |
1184 | * | |
1185 | * Return: The advanced size if successful, or a negative error code on failure. | |
1186 | */ | |
1187 | int snd_rawmidi_transmit_ack(struct snd_rawmidi_substream *substream, int count) | |
1188 | { | |
1189 | struct snd_rawmidi_runtime *runtime = substream->runtime; | |
1190 | int result; | |
1191 | unsigned long flags; | |
1192 | ||
1193 | spin_lock_irqsave(&runtime->lock, flags); | |
1194 | result = __snd_rawmidi_transmit_ack(substream, count); | |
1195 | spin_unlock_irqrestore(&runtime->lock, flags); | |
1196 | return result; | |
1197 | } | |
6776a5d7 | 1198 | EXPORT_SYMBOL(snd_rawmidi_transmit_ack); |
1da177e4 LT |
1199 | |
1200 | /** | |
1201 | * snd_rawmidi_transmit - copy from the buffer to the device | |
1202 | * @substream: the rawmidi substream | |
df8db936 | 1203 | * @buffer: the buffer pointer |
1da177e4 LT |
1204 | * @count: the data size to transfer |
1205 | * | |
1206 | * Copies data from the buffer to the device and advances the pointer. | |
1207 | * | |
eb7c06e8 | 1208 | * Return: The copied size if successful, or a negative error code on failure. |
1da177e4 | 1209 | */ |
48c9d417 TI |
1210 | int snd_rawmidi_transmit(struct snd_rawmidi_substream *substream, |
1211 | unsigned char *buffer, int count) | |
1da177e4 | 1212 | { |
06ab3003 TI |
1213 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
1214 | int result; | |
1215 | unsigned long flags; | |
1216 | ||
1217 | spin_lock_irqsave(&runtime->lock, flags); | |
219df32f | 1218 | if (!substream->opened) |
06ab3003 TI |
1219 | result = -EBADFD; |
1220 | else { | |
1221 | count = __snd_rawmidi_transmit_peek(substream, buffer, count); | |
1222 | if (count <= 0) | |
1223 | result = count; | |
1224 | else | |
1225 | result = __snd_rawmidi_transmit_ack(substream, count); | |
1226 | } | |
1227 | spin_unlock_irqrestore(&runtime->lock, flags); | |
1228 | return result; | |
1da177e4 | 1229 | } |
6776a5d7 | 1230 | EXPORT_SYMBOL(snd_rawmidi_transmit); |
1da177e4 | 1231 | |
48c9d417 | 1232 | static long snd_rawmidi_kernel_write1(struct snd_rawmidi_substream *substream, |
17596a80 MÅš |
1233 | const unsigned char __user *userbuf, |
1234 | const unsigned char *kernelbuf, | |
1235 | long count) | |
1da177e4 LT |
1236 | { |
1237 | unsigned long flags; | |
1238 | long count1, result; | |
48c9d417 | 1239 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
81f57754 | 1240 | unsigned long appl_ptr; |
1da177e4 | 1241 | |
cc85f7a6 | 1242 | if (!kernelbuf && !userbuf) |
7eaa943c TI |
1243 | return -EINVAL; |
1244 | if (snd_BUG_ON(!runtime->buffer)) | |
1245 | return -EINVAL; | |
1da177e4 LT |
1246 | |
1247 | result = 0; | |
1248 | spin_lock_irqsave(&runtime->lock, flags); | |
1249 | if (substream->append) { | |
1250 | if ((long)runtime->avail < count) { | |
1251 | spin_unlock_irqrestore(&runtime->lock, flags); | |
1252 | return -EAGAIN; | |
1253 | } | |
1254 | } | |
1255 | while (count > 0 && runtime->avail > 0) { | |
1256 | count1 = runtime->buffer_size - runtime->appl_ptr; | |
1257 | if (count1 > count) | |
1258 | count1 = count; | |
1259 | if (count1 > (long)runtime->avail) | |
1260 | count1 = runtime->avail; | |
81f57754 TI |
1261 | |
1262 | /* update runtime->appl_ptr before unlocking for userbuf */ | |
1263 | appl_ptr = runtime->appl_ptr; | |
1264 | runtime->appl_ptr += count1; | |
1265 | runtime->appl_ptr %= runtime->buffer_size; | |
1266 | runtime->avail -= count1; | |
1267 | ||
17596a80 | 1268 | if (kernelbuf) |
81f57754 | 1269 | memcpy(runtime->buffer + appl_ptr, |
17596a80 MÅš |
1270 | kernelbuf + result, count1); |
1271 | else if (userbuf) { | |
1da177e4 | 1272 | spin_unlock_irqrestore(&runtime->lock, flags); |
81f57754 | 1273 | if (copy_from_user(runtime->buffer + appl_ptr, |
17596a80 | 1274 | userbuf + result, count1)) { |
1da177e4 LT |
1275 | spin_lock_irqsave(&runtime->lock, flags); |
1276 | result = result > 0 ? result : -EFAULT; | |
1277 | goto __end; | |
1278 | } | |
1279 | spin_lock_irqsave(&runtime->lock, flags); | |
1280 | } | |
1da177e4 | 1281 | result += count1; |
1da177e4 LT |
1282 | count -= count1; |
1283 | } | |
1284 | __end: | |
1285 | count1 = runtime->avail < runtime->buffer_size; | |
1286 | spin_unlock_irqrestore(&runtime->lock, flags); | |
1287 | if (count1) | |
1288 | snd_rawmidi_output_trigger(substream, 1); | |
1289 | return result; | |
1290 | } | |
1291 | ||
48c9d417 TI |
1292 | long snd_rawmidi_kernel_write(struct snd_rawmidi_substream *substream, |
1293 | const unsigned char *buf, long count) | |
1da177e4 | 1294 | { |
17596a80 | 1295 | return snd_rawmidi_kernel_write1(substream, NULL, buf, count); |
1da177e4 | 1296 | } |
6776a5d7 | 1297 | EXPORT_SYMBOL(snd_rawmidi_kernel_write); |
1da177e4 | 1298 | |
48c9d417 TI |
1299 | static ssize_t snd_rawmidi_write(struct file *file, const char __user *buf, |
1300 | size_t count, loff_t *offset) | |
1da177e4 LT |
1301 | { |
1302 | long result, timeout; | |
1303 | int count1; | |
48c9d417 TI |
1304 | struct snd_rawmidi_file *rfile; |
1305 | struct snd_rawmidi_runtime *runtime; | |
1306 | struct snd_rawmidi_substream *substream; | |
1da177e4 LT |
1307 | |
1308 | rfile = file->private_data; | |
1309 | substream = rfile->output; | |
1310 | runtime = substream->runtime; | |
1311 | /* we cannot put an atomic message to our buffer */ | |
1312 | if (substream->append && count > runtime->buffer_size) | |
1313 | return -EIO; | |
1314 | result = 0; | |
1315 | while (count > 0) { | |
1316 | spin_lock_irq(&runtime->lock); | |
1317 | while (!snd_rawmidi_ready_append(substream, count)) { | |
ac6424b9 | 1318 | wait_queue_entry_t wait; |
1da177e4 LT |
1319 | if (file->f_flags & O_NONBLOCK) { |
1320 | spin_unlock_irq(&runtime->lock); | |
1321 | return result > 0 ? result : -EAGAIN; | |
1322 | } | |
1323 | init_waitqueue_entry(&wait, current); | |
1324 | add_wait_queue(&runtime->sleep, &wait); | |
1325 | set_current_state(TASK_INTERRUPTIBLE); | |
1326 | spin_unlock_irq(&runtime->lock); | |
1327 | timeout = schedule_timeout(30 * HZ); | |
1328 | remove_wait_queue(&runtime->sleep, &wait); | |
0914f796 TI |
1329 | if (rfile->rmidi->card->shutdown) |
1330 | return -ENODEV; | |
1da177e4 LT |
1331 | if (signal_pending(current)) |
1332 | return result > 0 ? result : -ERESTARTSYS; | |
1333 | if (!runtime->avail && !timeout) | |
1334 | return result > 0 ? result : -EIO; | |
1335 | spin_lock_irq(&runtime->lock); | |
1336 | } | |
1337 | spin_unlock_irq(&runtime->lock); | |
17596a80 | 1338 | count1 = snd_rawmidi_kernel_write1(substream, buf, NULL, count); |
1da177e4 LT |
1339 | if (count1 < 0) |
1340 | return result > 0 ? result : count1; | |
1341 | result += count1; | |
1342 | buf += count1; | |
1343 | if ((size_t)count1 < count && (file->f_flags & O_NONBLOCK)) | |
1344 | break; | |
1345 | count -= count1; | |
1346 | } | |
6b2f3d1f | 1347 | if (file->f_flags & O_DSYNC) { |
1da177e4 LT |
1348 | spin_lock_irq(&runtime->lock); |
1349 | while (runtime->avail != runtime->buffer_size) { | |
ac6424b9 | 1350 | wait_queue_entry_t wait; |
1da177e4 LT |
1351 | unsigned int last_avail = runtime->avail; |
1352 | init_waitqueue_entry(&wait, current); | |
1353 | add_wait_queue(&runtime->sleep, &wait); | |
1354 | set_current_state(TASK_INTERRUPTIBLE); | |
1355 | spin_unlock_irq(&runtime->lock); | |
1356 | timeout = schedule_timeout(30 * HZ); | |
1357 | remove_wait_queue(&runtime->sleep, &wait); | |
1358 | if (signal_pending(current)) | |
1359 | return result > 0 ? result : -ERESTARTSYS; | |
1360 | if (runtime->avail == last_avail && !timeout) | |
1361 | return result > 0 ? result : -EIO; | |
1362 | spin_lock_irq(&runtime->lock); | |
1363 | } | |
1364 | spin_unlock_irq(&runtime->lock); | |
1365 | } | |
1366 | return result; | |
1367 | } | |
1368 | ||
1369 | static unsigned int snd_rawmidi_poll(struct file *file, poll_table * wait) | |
1370 | { | |
48c9d417 TI |
1371 | struct snd_rawmidi_file *rfile; |
1372 | struct snd_rawmidi_runtime *runtime; | |
1da177e4 LT |
1373 | unsigned int mask; |
1374 | ||
1375 | rfile = file->private_data; | |
1376 | if (rfile->input != NULL) { | |
1377 | runtime = rfile->input->runtime; | |
1378 | snd_rawmidi_input_trigger(rfile->input, 1); | |
1379 | poll_wait(file, &runtime->sleep, wait); | |
1380 | } | |
1381 | if (rfile->output != NULL) { | |
1382 | runtime = rfile->output->runtime; | |
1383 | poll_wait(file, &runtime->sleep, wait); | |
1384 | } | |
1385 | mask = 0; | |
1386 | if (rfile->input != NULL) { | |
1387 | if (snd_rawmidi_ready(rfile->input)) | |
1388 | mask |= POLLIN | POLLRDNORM; | |
1389 | } | |
1390 | if (rfile->output != NULL) { | |
1391 | if (snd_rawmidi_ready(rfile->output)) | |
1392 | mask |= POLLOUT | POLLWRNORM; | |
1393 | } | |
1394 | return mask; | |
1395 | } | |
1396 | ||
1397 | /* | |
1398 | */ | |
1399 | #ifdef CONFIG_COMPAT | |
1400 | #include "rawmidi_compat.c" | |
1401 | #else | |
1402 | #define snd_rawmidi_ioctl_compat NULL | |
1403 | #endif | |
1404 | ||
1405 | /* | |
1406 | ||
1407 | */ | |
1408 | ||
48c9d417 TI |
1409 | static void snd_rawmidi_proc_info_read(struct snd_info_entry *entry, |
1410 | struct snd_info_buffer *buffer) | |
1da177e4 | 1411 | { |
48c9d417 TI |
1412 | struct snd_rawmidi *rmidi; |
1413 | struct snd_rawmidi_substream *substream; | |
1414 | struct snd_rawmidi_runtime *runtime; | |
1da177e4 LT |
1415 | |
1416 | rmidi = entry->private_data; | |
1417 | snd_iprintf(buffer, "%s\n\n", rmidi->name); | |
1a60d4c5 | 1418 | mutex_lock(&rmidi->open_mutex); |
1da177e4 | 1419 | if (rmidi->info_flags & SNDRV_RAWMIDI_INFO_OUTPUT) { |
9244b2c3 JB |
1420 | list_for_each_entry(substream, |
1421 | &rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substreams, | |
1422 | list) { | |
1da177e4 LT |
1423 | snd_iprintf(buffer, |
1424 | "Output %d\n" | |
1425 | " Tx bytes : %lu\n", | |
1426 | substream->number, | |
1427 | (unsigned long) substream->bytes); | |
1428 | if (substream->opened) { | |
7584af10 CL |
1429 | snd_iprintf(buffer, |
1430 | " Owner PID : %d\n", | |
1431 | pid_vnr(substream->pid)); | |
1da177e4 LT |
1432 | runtime = substream->runtime; |
1433 | snd_iprintf(buffer, | |
1434 | " Mode : %s\n" | |
1435 | " Buffer size : %lu\n" | |
1436 | " Avail : %lu\n", | |
1437 | runtime->oss ? "OSS compatible" : "native", | |
1438 | (unsigned long) runtime->buffer_size, | |
1439 | (unsigned long) runtime->avail); | |
1440 | } | |
1441 | } | |
1442 | } | |
1443 | if (rmidi->info_flags & SNDRV_RAWMIDI_INFO_INPUT) { | |
9244b2c3 JB |
1444 | list_for_each_entry(substream, |
1445 | &rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substreams, | |
1446 | list) { | |
1da177e4 LT |
1447 | snd_iprintf(buffer, |
1448 | "Input %d\n" | |
1449 | " Rx bytes : %lu\n", | |
1450 | substream->number, | |
1451 | (unsigned long) substream->bytes); | |
1452 | if (substream->opened) { | |
7584af10 CL |
1453 | snd_iprintf(buffer, |
1454 | " Owner PID : %d\n", | |
1455 | pid_vnr(substream->pid)); | |
1da177e4 LT |
1456 | runtime = substream->runtime; |
1457 | snd_iprintf(buffer, | |
1458 | " Buffer size : %lu\n" | |
1459 | " Avail : %lu\n" | |
1460 | " Overruns : %lu\n", | |
1461 | (unsigned long) runtime->buffer_size, | |
1462 | (unsigned long) runtime->avail, | |
1463 | (unsigned long) runtime->xruns); | |
1464 | } | |
1465 | } | |
1466 | } | |
1a60d4c5 | 1467 | mutex_unlock(&rmidi->open_mutex); |
1da177e4 LT |
1468 | } |
1469 | ||
1470 | /* | |
1471 | * Register functions | |
1472 | */ | |
1473 | ||
9c2e08c5 | 1474 | static const struct file_operations snd_rawmidi_f_ops = |
1da177e4 LT |
1475 | { |
1476 | .owner = THIS_MODULE, | |
1477 | .read = snd_rawmidi_read, | |
1478 | .write = snd_rawmidi_write, | |
1479 | .open = snd_rawmidi_open, | |
1480 | .release = snd_rawmidi_release, | |
02f4865f | 1481 | .llseek = no_llseek, |
1da177e4 LT |
1482 | .poll = snd_rawmidi_poll, |
1483 | .unlocked_ioctl = snd_rawmidi_ioctl, | |
1484 | .compat_ioctl = snd_rawmidi_ioctl_compat, | |
1485 | }; | |
1486 | ||
48c9d417 TI |
1487 | static int snd_rawmidi_alloc_substreams(struct snd_rawmidi *rmidi, |
1488 | struct snd_rawmidi_str *stream, | |
1da177e4 LT |
1489 | int direction, |
1490 | int count) | |
1491 | { | |
48c9d417 | 1492 | struct snd_rawmidi_substream *substream; |
1da177e4 LT |
1493 | int idx; |
1494 | ||
1da177e4 | 1495 | for (idx = 0; idx < count; idx++) { |
ca2c0966 | 1496 | substream = kzalloc(sizeof(*substream), GFP_KERNEL); |
ec0e9937 | 1497 | if (!substream) |
1da177e4 LT |
1498 | return -ENOMEM; |
1499 | substream->stream = direction; | |
1500 | substream->number = idx; | |
1501 | substream->rmidi = rmidi; | |
1502 | substream->pstr = stream; | |
1503 | list_add_tail(&substream->list, &stream->substreams); | |
1504 | stream->substream_count++; | |
1505 | } | |
1506 | return 0; | |
1507 | } | |
1508 | ||
aee5012f TI |
1509 | static void release_rawmidi_device(struct device *dev) |
1510 | { | |
1511 | kfree(container_of(dev, struct snd_rawmidi, dev)); | |
1512 | } | |
1513 | ||
1da177e4 LT |
1514 | /** |
1515 | * snd_rawmidi_new - create a rawmidi instance | |
1516 | * @card: the card instance | |
1517 | * @id: the id string | |
1518 | * @device: the device index | |
1519 | * @output_count: the number of output streams | |
1520 | * @input_count: the number of input streams | |
1521 | * @rrawmidi: the pointer to store the new rawmidi instance | |
1522 | * | |
1523 | * Creates a new rawmidi instance. | |
1524 | * Use snd_rawmidi_set_ops() to set the operators to the new instance. | |
1525 | * | |
eb7c06e8 | 1526 | * Return: Zero if successful, or a negative error code on failure. |
1da177e4 | 1527 | */ |
48c9d417 | 1528 | int snd_rawmidi_new(struct snd_card *card, char *id, int device, |
1da177e4 | 1529 | int output_count, int input_count, |
48c9d417 | 1530 | struct snd_rawmidi ** rrawmidi) |
1da177e4 | 1531 | { |
48c9d417 | 1532 | struct snd_rawmidi *rmidi; |
1da177e4 | 1533 | int err; |
48c9d417 | 1534 | static struct snd_device_ops ops = { |
1da177e4 LT |
1535 | .dev_free = snd_rawmidi_dev_free, |
1536 | .dev_register = snd_rawmidi_dev_register, | |
1537 | .dev_disconnect = snd_rawmidi_dev_disconnect, | |
1da177e4 LT |
1538 | }; |
1539 | ||
7eaa943c TI |
1540 | if (snd_BUG_ON(!card)) |
1541 | return -ENXIO; | |
1542 | if (rrawmidi) | |
1543 | *rrawmidi = NULL; | |
ca2c0966 | 1544 | rmidi = kzalloc(sizeof(*rmidi), GFP_KERNEL); |
ec0e9937 | 1545 | if (!rmidi) |
1da177e4 LT |
1546 | return -ENOMEM; |
1547 | rmidi->card = card; | |
1548 | rmidi->device = device; | |
1a60d4c5 | 1549 | mutex_init(&rmidi->open_mutex); |
1da177e4 | 1550 | init_waitqueue_head(&rmidi->open_wait); |
c13893d7 AM |
1551 | INIT_LIST_HEAD(&rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substreams); |
1552 | INIT_LIST_HEAD(&rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substreams); | |
1553 | ||
1da177e4 LT |
1554 | if (id != NULL) |
1555 | strlcpy(rmidi->id, id, sizeof(rmidi->id)); | |
aee5012f TI |
1556 | |
1557 | snd_device_initialize(&rmidi->dev, card); | |
1558 | rmidi->dev.release = release_rawmidi_device; | |
1559 | dev_set_name(&rmidi->dev, "midiC%iD%i", card->number, device); | |
1560 | ||
73e77ba0 TI |
1561 | if ((err = snd_rawmidi_alloc_substreams(rmidi, |
1562 | &rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT], | |
1563 | SNDRV_RAWMIDI_STREAM_INPUT, | |
1564 | input_count)) < 0) { | |
1da177e4 LT |
1565 | snd_rawmidi_free(rmidi); |
1566 | return err; | |
1567 | } | |
73e77ba0 TI |
1568 | if ((err = snd_rawmidi_alloc_substreams(rmidi, |
1569 | &rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT], | |
1570 | SNDRV_RAWMIDI_STREAM_OUTPUT, | |
1571 | output_count)) < 0) { | |
1da177e4 LT |
1572 | snd_rawmidi_free(rmidi); |
1573 | return err; | |
1574 | } | |
1575 | if ((err = snd_device_new(card, SNDRV_DEV_RAWMIDI, rmidi, &ops)) < 0) { | |
1576 | snd_rawmidi_free(rmidi); | |
1577 | return err; | |
1578 | } | |
7eaa943c TI |
1579 | if (rrawmidi) |
1580 | *rrawmidi = rmidi; | |
1da177e4 LT |
1581 | return 0; |
1582 | } | |
6776a5d7 | 1583 | EXPORT_SYMBOL(snd_rawmidi_new); |
1da177e4 | 1584 | |
48c9d417 | 1585 | static void snd_rawmidi_free_substreams(struct snd_rawmidi_str *stream) |
1da177e4 | 1586 | { |
48c9d417 | 1587 | struct snd_rawmidi_substream *substream; |
1da177e4 LT |
1588 | |
1589 | while (!list_empty(&stream->substreams)) { | |
48c9d417 | 1590 | substream = list_entry(stream->substreams.next, struct snd_rawmidi_substream, list); |
1da177e4 LT |
1591 | list_del(&substream->list); |
1592 | kfree(substream); | |
1593 | } | |
1594 | } | |
1595 | ||
48c9d417 | 1596 | static int snd_rawmidi_free(struct snd_rawmidi *rmidi) |
1da177e4 | 1597 | { |
7eaa943c TI |
1598 | if (!rmidi) |
1599 | return 0; | |
c461482c TI |
1600 | |
1601 | snd_info_free_entry(rmidi->proc_entry); | |
1602 | rmidi->proc_entry = NULL; | |
1603 | mutex_lock(®ister_mutex); | |
1604 | if (rmidi->ops && rmidi->ops->dev_unregister) | |
1605 | rmidi->ops->dev_unregister(rmidi); | |
1606 | mutex_unlock(®ister_mutex); | |
1607 | ||
1da177e4 LT |
1608 | snd_rawmidi_free_substreams(&rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT]); |
1609 | snd_rawmidi_free_substreams(&rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT]); | |
1610 | if (rmidi->private_free) | |
1611 | rmidi->private_free(rmidi); | |
aee5012f | 1612 | put_device(&rmidi->dev); |
1da177e4 LT |
1613 | return 0; |
1614 | } | |
1615 | ||
48c9d417 | 1616 | static int snd_rawmidi_dev_free(struct snd_device *device) |
1da177e4 | 1617 | { |
48c9d417 | 1618 | struct snd_rawmidi *rmidi = device->device_data; |
1da177e4 LT |
1619 | return snd_rawmidi_free(rmidi); |
1620 | } | |
1621 | ||
111b0cdb | 1622 | #if IS_ENABLED(CONFIG_SND_SEQUENCER) |
48c9d417 | 1623 | static void snd_rawmidi_dev_seq_free(struct snd_seq_device *device) |
1da177e4 | 1624 | { |
48c9d417 | 1625 | struct snd_rawmidi *rmidi = device->private_data; |
1da177e4 LT |
1626 | rmidi->seq_dev = NULL; |
1627 | } | |
1628 | #endif | |
1629 | ||
48c9d417 | 1630 | static int snd_rawmidi_dev_register(struct snd_device *device) |
1da177e4 | 1631 | { |
f87135f5 | 1632 | int err; |
48c9d417 | 1633 | struct snd_info_entry *entry; |
1da177e4 | 1634 | char name[16]; |
48c9d417 | 1635 | struct snd_rawmidi *rmidi = device->device_data; |
1da177e4 LT |
1636 | |
1637 | if (rmidi->device >= SNDRV_RAWMIDI_DEVICES) | |
1638 | return -ENOMEM; | |
1a60d4c5 | 1639 | mutex_lock(®ister_mutex); |
f87135f5 | 1640 | if (snd_rawmidi_search(rmidi->card, rmidi->device)) { |
1a60d4c5 | 1641 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
1642 | return -EBUSY; |
1643 | } | |
f87135f5 | 1644 | list_add_tail(&rmidi->list, &snd_rawmidi_devices); |
816f318b | 1645 | mutex_unlock(®ister_mutex); |
40a4b263 TI |
1646 | err = snd_register_device(SNDRV_DEVICE_TYPE_RAWMIDI, |
1647 | rmidi->card, rmidi->device, | |
1648 | &snd_rawmidi_f_ops, rmidi, &rmidi->dev); | |
aee5012f TI |
1649 | if (err < 0) { |
1650 | rmidi_err(rmidi, "unable to register\n"); | |
816f318b | 1651 | mutex_lock(®ister_mutex); |
f87135f5 | 1652 | list_del(&rmidi->list); |
1a60d4c5 | 1653 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
1654 | return err; |
1655 | } | |
1656 | if (rmidi->ops && rmidi->ops->dev_register && | |
1657 | (err = rmidi->ops->dev_register(rmidi)) < 0) { | |
40a4b263 | 1658 | snd_unregister_device(&rmidi->dev); |
816f318b | 1659 | mutex_lock(®ister_mutex); |
f87135f5 | 1660 | list_del(&rmidi->list); |
1a60d4c5 | 1661 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
1662 | return err; |
1663 | } | |
1664 | #ifdef CONFIG_SND_OSSEMUL | |
1665 | rmidi->ossreg = 0; | |
1666 | if ((int)rmidi->device == midi_map[rmidi->card->number]) { | |
1667 | if (snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_MIDI, | |
f87135f5 | 1668 | rmidi->card, 0, &snd_rawmidi_f_ops, |
80d7d771 | 1669 | rmidi) < 0) { |
ca20d292 TI |
1670 | rmidi_err(rmidi, |
1671 | "unable to register OSS rawmidi device %i:%i\n", | |
1672 | rmidi->card->number, 0); | |
1da177e4 LT |
1673 | } else { |
1674 | rmidi->ossreg++; | |
1675 | #ifdef SNDRV_OSS_INFO_DEV_MIDI | |
1676 | snd_oss_info_register(SNDRV_OSS_INFO_DEV_MIDI, rmidi->card->number, rmidi->name); | |
1677 | #endif | |
1678 | } | |
1679 | } | |
1680 | if ((int)rmidi->device == amidi_map[rmidi->card->number]) { | |
1681 | if (snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_MIDI, | |
f87135f5 | 1682 | rmidi->card, 1, &snd_rawmidi_f_ops, |
80d7d771 | 1683 | rmidi) < 0) { |
ca20d292 TI |
1684 | rmidi_err(rmidi, |
1685 | "unable to register OSS rawmidi device %i:%i\n", | |
1686 | rmidi->card->number, 1); | |
1da177e4 LT |
1687 | } else { |
1688 | rmidi->ossreg++; | |
1689 | } | |
1690 | } | |
1691 | #endif /* CONFIG_SND_OSSEMUL */ | |
1da177e4 LT |
1692 | sprintf(name, "midi%d", rmidi->device); |
1693 | entry = snd_info_create_card_entry(rmidi->card, name, rmidi->card->proc_root); | |
1694 | if (entry) { | |
1695 | entry->private_data = rmidi; | |
1da177e4 LT |
1696 | entry->c.text.read = snd_rawmidi_proc_info_read; |
1697 | if (snd_info_register(entry) < 0) { | |
1698 | snd_info_free_entry(entry); | |
1699 | entry = NULL; | |
1700 | } | |
1701 | } | |
1702 | rmidi->proc_entry = entry; | |
111b0cdb | 1703 | #if IS_ENABLED(CONFIG_SND_SEQUENCER) |
1da177e4 LT |
1704 | if (!rmidi->ops || !rmidi->ops->dev_register) { /* own registration mechanism */ |
1705 | if (snd_seq_device_new(rmidi->card, rmidi->device, SNDRV_SEQ_DEV_ID_MIDISYNTH, 0, &rmidi->seq_dev) >= 0) { | |
1706 | rmidi->seq_dev->private_data = rmidi; | |
1707 | rmidi->seq_dev->private_free = snd_rawmidi_dev_seq_free; | |
1708 | sprintf(rmidi->seq_dev->name, "MIDI %d-%d", rmidi->card->number, rmidi->device); | |
1709 | snd_device_register(rmidi->card, rmidi->seq_dev); | |
1710 | } | |
1711 | } | |
1712 | #endif | |
1713 | return 0; | |
1714 | } | |
1715 | ||
48c9d417 | 1716 | static int snd_rawmidi_dev_disconnect(struct snd_device *device) |
1da177e4 | 1717 | { |
48c9d417 | 1718 | struct snd_rawmidi *rmidi = device->device_data; |
0914f796 | 1719 | int dir; |
1da177e4 | 1720 | |
1a60d4c5 | 1721 | mutex_lock(®ister_mutex); |
0914f796 TI |
1722 | mutex_lock(&rmidi->open_mutex); |
1723 | wake_up(&rmidi->open_wait); | |
f87135f5 | 1724 | list_del_init(&rmidi->list); |
0914f796 TI |
1725 | for (dir = 0; dir < 2; dir++) { |
1726 | struct snd_rawmidi_substream *s; | |
1727 | list_for_each_entry(s, &rmidi->streams[dir].substreams, list) { | |
1728 | if (s->runtime) | |
1729 | wake_up(&s->runtime->sleep); | |
1730 | } | |
1731 | } | |
1732 | ||
1da177e4 LT |
1733 | #ifdef CONFIG_SND_OSSEMUL |
1734 | if (rmidi->ossreg) { | |
1735 | if ((int)rmidi->device == midi_map[rmidi->card->number]) { | |
1736 | snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_MIDI, rmidi->card, 0); | |
1737 | #ifdef SNDRV_OSS_INFO_DEV_MIDI | |
1738 | snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_MIDI, rmidi->card->number); | |
1739 | #endif | |
1740 | } | |
1741 | if ((int)rmidi->device == amidi_map[rmidi->card->number]) | |
1742 | snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_MIDI, rmidi->card, 1); | |
1743 | rmidi->ossreg = 0; | |
1744 | } | |
1745 | #endif /* CONFIG_SND_OSSEMUL */ | |
40a4b263 | 1746 | snd_unregister_device(&rmidi->dev); |
0914f796 | 1747 | mutex_unlock(&rmidi->open_mutex); |
1a60d4c5 | 1748 | mutex_unlock(®ister_mutex); |
c461482c | 1749 | return 0; |
1da177e4 LT |
1750 | } |
1751 | ||
1752 | /** | |
1753 | * snd_rawmidi_set_ops - set the rawmidi operators | |
1754 | * @rmidi: the rawmidi instance | |
1755 | * @stream: the stream direction, SNDRV_RAWMIDI_STREAM_XXX | |
1756 | * @ops: the operator table | |
1757 | * | |
1758 | * Sets the rawmidi operators for the given stream direction. | |
1759 | */ | |
48c9d417 | 1760 | void snd_rawmidi_set_ops(struct snd_rawmidi *rmidi, int stream, |
6ba79b85 | 1761 | const struct snd_rawmidi_ops *ops) |
1da177e4 | 1762 | { |
48c9d417 | 1763 | struct snd_rawmidi_substream *substream; |
1da177e4 | 1764 | |
9244b2c3 | 1765 | list_for_each_entry(substream, &rmidi->streams[stream].substreams, list) |
1da177e4 | 1766 | substream->ops = ops; |
1da177e4 | 1767 | } |
6776a5d7 | 1768 | EXPORT_SYMBOL(snd_rawmidi_set_ops); |
1da177e4 LT |
1769 | |
1770 | /* | |
1771 | * ENTRY functions | |
1772 | */ | |
1773 | ||
1774 | static int __init alsa_rawmidi_init(void) | |
1775 | { | |
1776 | ||
1777 | snd_ctl_register_ioctl(snd_rawmidi_control_ioctl); | |
1778 | snd_ctl_register_ioctl_compat(snd_rawmidi_control_ioctl); | |
1779 | #ifdef CONFIG_SND_OSSEMUL | |
1780 | { int i; | |
1781 | /* check device map table */ | |
1782 | for (i = 0; i < SNDRV_CARDS; i++) { | |
1783 | if (midi_map[i] < 0 || midi_map[i] >= SNDRV_RAWMIDI_DEVICES) { | |
ca20d292 TI |
1784 | pr_err("ALSA: rawmidi: invalid midi_map[%d] = %d\n", |
1785 | i, midi_map[i]); | |
1da177e4 LT |
1786 | midi_map[i] = 0; |
1787 | } | |
1788 | if (amidi_map[i] < 0 || amidi_map[i] >= SNDRV_RAWMIDI_DEVICES) { | |
ca20d292 TI |
1789 | pr_err("ALSA: rawmidi: invalid amidi_map[%d] = %d\n", |
1790 | i, amidi_map[i]); | |
1da177e4 LT |
1791 | amidi_map[i] = 1; |
1792 | } | |
1793 | } | |
1794 | } | |
1795 | #endif /* CONFIG_SND_OSSEMUL */ | |
1796 | return 0; | |
1797 | } | |
1798 | ||
1799 | static void __exit alsa_rawmidi_exit(void) | |
1800 | { | |
1801 | snd_ctl_unregister_ioctl(snd_rawmidi_control_ioctl); | |
1802 | snd_ctl_unregister_ioctl_compat(snd_rawmidi_control_ioctl); | |
1803 | } | |
1804 | ||
1805 | module_init(alsa_rawmidi_init) | |
1806 | module_exit(alsa_rawmidi_exit) |