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 TI |
59 | #define rmidi_err(rmidi, fmt, args...) \ |
60 | dev_err((rmidi)->card->dev, fmt, ##args) | |
61 | #define rmidi_warn(rmidi, fmt, args...) \ | |
62 | dev_warn((rmidi)->card->dev, fmt, ##args) | |
63 | #define rmidi_dbg(rmidi, fmt, args...) \ | |
64 | dev_dbg((rmidi)->card->dev, fmt, ##args) | |
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; |
48c9d417 | 372 | struct snd_ctl_file *kctl; |
1da177e4 | 373 | |
9a1b64ca TI |
374 | if ((file->f_flags & O_APPEND) && !(file->f_flags & O_NONBLOCK)) |
375 | return -EINVAL; /* invalid combination */ | |
376 | ||
02f4865f TI |
377 | err = nonseekable_open(inode, file); |
378 | if (err < 0) | |
379 | return err; | |
380 | ||
f1902860 | 381 | if (maj == snd_major) { |
f87135f5 CL |
382 | rmidi = snd_lookup_minor_data(iminor(inode), |
383 | SNDRV_DEVICE_TYPE_RAWMIDI); | |
1da177e4 | 384 | #ifdef CONFIG_SND_OSSEMUL |
f1902860 | 385 | } else if (maj == SOUND_MAJOR) { |
f87135f5 CL |
386 | rmidi = snd_lookup_oss_minor_data(iminor(inode), |
387 | SNDRV_OSS_DEVICE_TYPE_MIDI); | |
1da177e4 | 388 | #endif |
f1902860 | 389 | } else |
1da177e4 | 390 | return -ENXIO; |
1da177e4 | 391 | |
1da177e4 LT |
392 | if (rmidi == NULL) |
393 | return -ENODEV; | |
9a1b64ca | 394 | |
a0830dbd TI |
395 | if (!try_module_get(rmidi->card->module)) { |
396 | snd_card_unref(rmidi->card); | |
9a1b64ca | 397 | return -ENXIO; |
a0830dbd | 398 | } |
9a1b64ca TI |
399 | |
400 | mutex_lock(&rmidi->open_mutex); | |
1da177e4 LT |
401 | card = rmidi->card; |
402 | err = snd_card_file_add(card, file); | |
403 | if (err < 0) | |
9a1b64ca | 404 | goto __error_card; |
1da177e4 | 405 | fflags = snd_rawmidi_file_flags(file); |
f1902860 | 406 | if ((file->f_flags & O_APPEND) || maj == SOUND_MAJOR) /* OSS emul? */ |
1da177e4 | 407 | fflags |= SNDRV_RAWMIDI_LFLG_APPEND; |
1da177e4 LT |
408 | rawmidi_file = kmalloc(sizeof(*rawmidi_file), GFP_KERNEL); |
409 | if (rawmidi_file == NULL) { | |
9a1b64ca TI |
410 | err = -ENOMEM; |
411 | goto __error; | |
1da177e4 LT |
412 | } |
413 | init_waitqueue_entry(&wait, current); | |
414 | add_wait_queue(&rmidi->open_wait, &wait); | |
1da177e4 LT |
415 | while (1) { |
416 | subdevice = -1; | |
399ccdc1 | 417 | read_lock(&card->ctl_files_rwlock); |
9244b2c3 | 418 | list_for_each_entry(kctl, &card->ctl_files, list) { |
25d27ede | 419 | if (kctl->pid == task_pid(current)) { |
1da177e4 | 420 | subdevice = kctl->prefer_rawmidi_subdevice; |
2529bba7 TI |
421 | if (subdevice != -1) |
422 | break; | |
1da177e4 LT |
423 | } |
424 | } | |
399ccdc1 | 425 | read_unlock(&card->ctl_files_rwlock); |
9a1b64ca | 426 | err = rawmidi_open_priv(rmidi, subdevice, fflags, rawmidi_file); |
1da177e4 LT |
427 | if (err >= 0) |
428 | break; | |
429 | if (err == -EAGAIN) { | |
430 | if (file->f_flags & O_NONBLOCK) { | |
431 | err = -EBUSY; | |
432 | break; | |
433 | } | |
434 | } else | |
435 | break; | |
436 | set_current_state(TASK_INTERRUPTIBLE); | |
1a60d4c5 | 437 | mutex_unlock(&rmidi->open_mutex); |
1da177e4 | 438 | schedule(); |
1a60d4c5 | 439 | mutex_lock(&rmidi->open_mutex); |
0914f796 TI |
440 | if (rmidi->card->shutdown) { |
441 | err = -ENODEV; | |
442 | break; | |
443 | } | |
1da177e4 LT |
444 | if (signal_pending(current)) { |
445 | err = -ERESTARTSYS; | |
446 | break; | |
447 | } | |
448 | } | |
9a1b64ca TI |
449 | remove_wait_queue(&rmidi->open_wait, &wait); |
450 | if (err < 0) { | |
451 | kfree(rawmidi_file); | |
452 | goto __error; | |
453 | } | |
1da177e4 LT |
454 | #ifdef CONFIG_SND_OSSEMUL |
455 | if (rawmidi_file->input && rawmidi_file->input->runtime) | |
456 | rawmidi_file->input->runtime->oss = (maj == SOUND_MAJOR); | |
457 | if (rawmidi_file->output && rawmidi_file->output->runtime) | |
458 | rawmidi_file->output->runtime->oss = (maj == SOUND_MAJOR); | |
459 | #endif | |
9a1b64ca TI |
460 | file->private_data = rawmidi_file; |
461 | mutex_unlock(&rmidi->open_mutex); | |
a0830dbd | 462 | snd_card_unref(rmidi->card); |
9a1b64ca TI |
463 | return 0; |
464 | ||
465 | __error: | |
466 | snd_card_file_remove(card, file); | |
467 | __error_card: | |
1a60d4c5 | 468 | mutex_unlock(&rmidi->open_mutex); |
9a1b64ca | 469 | module_put(rmidi->card->module); |
a0830dbd | 470 | snd_card_unref(rmidi->card); |
1da177e4 LT |
471 | return err; |
472 | } | |
473 | ||
9a1b64ca TI |
474 | static void close_substream(struct snd_rawmidi *rmidi, |
475 | struct snd_rawmidi_substream *substream, | |
476 | int cleanup) | |
1da177e4 | 477 | { |
9a1b64ca TI |
478 | if (--substream->use_count) |
479 | return; | |
1da177e4 | 480 | |
9a1b64ca TI |
481 | if (cleanup) { |
482 | if (substream->stream == SNDRV_RAWMIDI_STREAM_INPUT) | |
483 | snd_rawmidi_input_trigger(substream, 0); | |
484 | else { | |
1da177e4 LT |
485 | if (substream->active_sensing) { |
486 | unsigned char buf = 0xfe; | |
9a1b64ca TI |
487 | /* sending single active sensing message |
488 | * to shut the device up | |
489 | */ | |
1da177e4 LT |
490 | snd_rawmidi_kernel_write(substream, &buf, 1); |
491 | } | |
492 | if (snd_rawmidi_drain_output(substream) == -ERESTARTSYS) | |
493 | snd_rawmidi_output_trigger(substream, 0); | |
1da177e4 | 494 | } |
1da177e4 | 495 | } |
9a1b64ca TI |
496 | substream->ops->close(substream); |
497 | if (substream->runtime->private_free) | |
498 | substream->runtime->private_free(substream); | |
499 | snd_rawmidi_runtime_free(substream); | |
500 | substream->opened = 0; | |
501 | substream->append = 0; | |
7584af10 CL |
502 | put_pid(substream->pid); |
503 | substream->pid = NULL; | |
91d12c48 | 504 | rmidi->streams[substream->stream].substream_opened--; |
9a1b64ca TI |
505 | } |
506 | ||
507 | static void rawmidi_release_priv(struct snd_rawmidi_file *rfile) | |
508 | { | |
509 | struct snd_rawmidi *rmidi; | |
510 | ||
511 | rmidi = rfile->rmidi; | |
512 | mutex_lock(&rmidi->open_mutex); | |
513 | if (rfile->input) { | |
514 | close_substream(rmidi, rfile->input, 1); | |
515 | rfile->input = NULL; | |
516 | } | |
517 | if (rfile->output) { | |
518 | close_substream(rmidi, rfile->output, 1); | |
519 | rfile->output = NULL; | |
520 | } | |
521 | rfile->rmidi = NULL; | |
1a60d4c5 | 522 | mutex_unlock(&rmidi->open_mutex); |
9a1b64ca TI |
523 | wake_up(&rmidi->open_wait); |
524 | } | |
525 | ||
526 | /* called from sound/core/seq/seq_midi.c */ | |
527 | int snd_rawmidi_kernel_release(struct snd_rawmidi_file *rfile) | |
528 | { | |
529 | struct snd_rawmidi *rmidi; | |
530 | ||
531 | if (snd_BUG_ON(!rfile)) | |
532 | return -ENXIO; | |
533 | ||
534 | rmidi = rfile->rmidi; | |
535 | rawmidi_release_priv(rfile); | |
1da177e4 LT |
536 | module_put(rmidi->card->module); |
537 | return 0; | |
538 | } | |
6776a5d7 | 539 | EXPORT_SYMBOL(snd_rawmidi_kernel_release); |
1da177e4 LT |
540 | |
541 | static int snd_rawmidi_release(struct inode *inode, struct file *file) | |
542 | { | |
48c9d417 TI |
543 | struct snd_rawmidi_file *rfile; |
544 | struct snd_rawmidi *rmidi; | |
aa73aec6 | 545 | struct module *module; |
1da177e4 LT |
546 | |
547 | rfile = file->private_data; | |
1da177e4 | 548 | rmidi = rfile->rmidi; |
9a1b64ca | 549 | rawmidi_release_priv(rfile); |
1da177e4 | 550 | kfree(rfile); |
aa73aec6 | 551 | module = rmidi->card->module; |
1da177e4 | 552 | snd_card_file_remove(rmidi->card, file); |
aa73aec6 | 553 | module_put(module); |
9a1b64ca | 554 | return 0; |
1da177e4 LT |
555 | } |
556 | ||
18612048 AB |
557 | static int snd_rawmidi_info(struct snd_rawmidi_substream *substream, |
558 | struct snd_rawmidi_info *info) | |
1da177e4 | 559 | { |
48c9d417 | 560 | struct snd_rawmidi *rmidi; |
1da177e4 LT |
561 | |
562 | if (substream == NULL) | |
563 | return -ENODEV; | |
564 | rmidi = substream->rmidi; | |
565 | memset(info, 0, sizeof(*info)); | |
566 | info->card = rmidi->card->number; | |
567 | info->device = rmidi->device; | |
568 | info->subdevice = substream->number; | |
569 | info->stream = substream->stream; | |
570 | info->flags = rmidi->info_flags; | |
571 | strcpy(info->id, rmidi->id); | |
572 | strcpy(info->name, rmidi->name); | |
573 | strcpy(info->subname, substream->name); | |
574 | info->subdevices_count = substream->pstr->substream_count; | |
575 | info->subdevices_avail = (substream->pstr->substream_count - | |
576 | substream->pstr->substream_opened); | |
577 | return 0; | |
578 | } | |
579 | ||
48c9d417 TI |
580 | static int snd_rawmidi_info_user(struct snd_rawmidi_substream *substream, |
581 | struct snd_rawmidi_info __user * _info) | |
1da177e4 | 582 | { |
48c9d417 | 583 | struct snd_rawmidi_info info; |
1da177e4 LT |
584 | int err; |
585 | if ((err = snd_rawmidi_info(substream, &info)) < 0) | |
586 | return err; | |
48c9d417 | 587 | if (copy_to_user(_info, &info, sizeof(struct snd_rawmidi_info))) |
1da177e4 LT |
588 | return -EFAULT; |
589 | return 0; | |
590 | } | |
591 | ||
48c9d417 | 592 | int snd_rawmidi_info_select(struct snd_card *card, struct snd_rawmidi_info *info) |
1da177e4 | 593 | { |
48c9d417 TI |
594 | struct snd_rawmidi *rmidi; |
595 | struct snd_rawmidi_str *pstr; | |
596 | struct snd_rawmidi_substream *substream; | |
f87135f5 | 597 | |
1a60d4c5 | 598 | mutex_lock(®ister_mutex); |
f87135f5 | 599 | rmidi = snd_rawmidi_search(card, info->device); |
1a60d4c5 | 600 | mutex_unlock(®ister_mutex); |
a106cd3d CL |
601 | if (!rmidi) |
602 | return -ENXIO; | |
1da177e4 LT |
603 | if (info->stream < 0 || info->stream > 1) |
604 | return -EINVAL; | |
605 | pstr = &rmidi->streams[info->stream]; | |
606 | if (pstr->substream_count == 0) | |
607 | return -ENOENT; | |
608 | if (info->subdevice >= pstr->substream_count) | |
609 | return -ENXIO; | |
9244b2c3 | 610 | list_for_each_entry(substream, &pstr->substreams, list) { |
1da177e4 LT |
611 | if ((unsigned int)substream->number == info->subdevice) |
612 | return snd_rawmidi_info(substream, info); | |
613 | } | |
614 | return -ENXIO; | |
615 | } | |
6776a5d7 | 616 | EXPORT_SYMBOL(snd_rawmidi_info_select); |
1da177e4 | 617 | |
48c9d417 TI |
618 | static int snd_rawmidi_info_select_user(struct snd_card *card, |
619 | struct snd_rawmidi_info __user *_info) | |
1da177e4 LT |
620 | { |
621 | int err; | |
48c9d417 | 622 | struct snd_rawmidi_info info; |
1da177e4 LT |
623 | if (get_user(info.device, &_info->device)) |
624 | return -EFAULT; | |
625 | if (get_user(info.stream, &_info->stream)) | |
626 | return -EFAULT; | |
627 | if (get_user(info.subdevice, &_info->subdevice)) | |
628 | return -EFAULT; | |
629 | if ((err = snd_rawmidi_info_select(card, &info)) < 0) | |
630 | return err; | |
48c9d417 | 631 | if (copy_to_user(_info, &info, sizeof(struct snd_rawmidi_info))) |
1da177e4 LT |
632 | return -EFAULT; |
633 | return 0; | |
634 | } | |
635 | ||
48c9d417 TI |
636 | int snd_rawmidi_output_params(struct snd_rawmidi_substream *substream, |
637 | struct snd_rawmidi_params * params) | |
1da177e4 LT |
638 | { |
639 | char *newbuf; | |
48c9d417 | 640 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
1da177e4 LT |
641 | |
642 | if (substream->append && substream->use_count > 1) | |
643 | return -EBUSY; | |
644 | snd_rawmidi_drain_output(substream); | |
645 | if (params->buffer_size < 32 || params->buffer_size > 1024L * 1024L) { | |
646 | return -EINVAL; | |
647 | } | |
648 | if (params->avail_min < 1 || params->avail_min > params->buffer_size) { | |
649 | return -EINVAL; | |
650 | } | |
651 | if (params->buffer_size != runtime->buffer_size) { | |
3101ba03 TI |
652 | newbuf = krealloc(runtime->buffer, params->buffer_size, |
653 | GFP_KERNEL); | |
4fa95ef6 | 654 | if (!newbuf) |
1da177e4 | 655 | return -ENOMEM; |
1da177e4 LT |
656 | runtime->buffer = newbuf; |
657 | runtime->buffer_size = params->buffer_size; | |
1b98ea47 | 658 | runtime->avail = runtime->buffer_size; |
1da177e4 LT |
659 | } |
660 | runtime->avail_min = params->avail_min; | |
661 | substream->active_sensing = !params->no_active_sensing; | |
662 | return 0; | |
663 | } | |
6776a5d7 | 664 | EXPORT_SYMBOL(snd_rawmidi_output_params); |
1da177e4 | 665 | |
48c9d417 TI |
666 | int snd_rawmidi_input_params(struct snd_rawmidi_substream *substream, |
667 | struct snd_rawmidi_params * params) | |
1da177e4 LT |
668 | { |
669 | char *newbuf; | |
48c9d417 | 670 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
1da177e4 LT |
671 | |
672 | snd_rawmidi_drain_input(substream); | |
673 | if (params->buffer_size < 32 || params->buffer_size > 1024L * 1024L) { | |
674 | return -EINVAL; | |
675 | } | |
676 | if (params->avail_min < 1 || params->avail_min > params->buffer_size) { | |
677 | return -EINVAL; | |
678 | } | |
679 | if (params->buffer_size != runtime->buffer_size) { | |
3101ba03 TI |
680 | newbuf = krealloc(runtime->buffer, params->buffer_size, |
681 | GFP_KERNEL); | |
4fa95ef6 | 682 | if (!newbuf) |
1da177e4 | 683 | return -ENOMEM; |
1da177e4 LT |
684 | runtime->buffer = newbuf; |
685 | runtime->buffer_size = params->buffer_size; | |
686 | } | |
687 | runtime->avail_min = params->avail_min; | |
688 | return 0; | |
689 | } | |
6776a5d7 | 690 | EXPORT_SYMBOL(snd_rawmidi_input_params); |
1da177e4 | 691 | |
48c9d417 TI |
692 | static int snd_rawmidi_output_status(struct snd_rawmidi_substream *substream, |
693 | struct snd_rawmidi_status * status) | |
1da177e4 | 694 | { |
48c9d417 | 695 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
1da177e4 LT |
696 | |
697 | memset(status, 0, sizeof(*status)); | |
698 | status->stream = SNDRV_RAWMIDI_STREAM_OUTPUT; | |
699 | spin_lock_irq(&runtime->lock); | |
700 | status->avail = runtime->avail; | |
701 | spin_unlock_irq(&runtime->lock); | |
702 | return 0; | |
703 | } | |
704 | ||
48c9d417 TI |
705 | static int snd_rawmidi_input_status(struct snd_rawmidi_substream *substream, |
706 | struct snd_rawmidi_status * status) | |
1da177e4 | 707 | { |
48c9d417 | 708 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
1da177e4 LT |
709 | |
710 | memset(status, 0, sizeof(*status)); | |
711 | status->stream = SNDRV_RAWMIDI_STREAM_INPUT; | |
712 | spin_lock_irq(&runtime->lock); | |
713 | status->avail = runtime->avail; | |
714 | status->xruns = runtime->xruns; | |
715 | runtime->xruns = 0; | |
716 | spin_unlock_irq(&runtime->lock); | |
717 | return 0; | |
718 | } | |
719 | ||
720 | static long snd_rawmidi_ioctl(struct file *file, unsigned int cmd, unsigned long arg) | |
721 | { | |
48c9d417 | 722 | struct snd_rawmidi_file *rfile; |
1da177e4 LT |
723 | void __user *argp = (void __user *)arg; |
724 | ||
725 | rfile = file->private_data; | |
726 | if (((cmd >> 8) & 0xff) != 'W') | |
727 | return -ENOTTY; | |
728 | switch (cmd) { | |
729 | case SNDRV_RAWMIDI_IOCTL_PVERSION: | |
730 | return put_user(SNDRV_RAWMIDI_VERSION, (int __user *)argp) ? -EFAULT : 0; | |
731 | case SNDRV_RAWMIDI_IOCTL_INFO: | |
732 | { | |
48c9d417 TI |
733 | int stream; |
734 | struct snd_rawmidi_info __user *info = argp; | |
1da177e4 LT |
735 | if (get_user(stream, &info->stream)) |
736 | return -EFAULT; | |
737 | switch (stream) { | |
738 | case SNDRV_RAWMIDI_STREAM_INPUT: | |
739 | return snd_rawmidi_info_user(rfile->input, info); | |
740 | case SNDRV_RAWMIDI_STREAM_OUTPUT: | |
741 | return snd_rawmidi_info_user(rfile->output, info); | |
742 | default: | |
743 | return -EINVAL; | |
744 | } | |
745 | } | |
746 | case SNDRV_RAWMIDI_IOCTL_PARAMS: | |
747 | { | |
48c9d417 TI |
748 | struct snd_rawmidi_params params; |
749 | if (copy_from_user(¶ms, argp, sizeof(struct snd_rawmidi_params))) | |
1da177e4 LT |
750 | return -EFAULT; |
751 | switch (params.stream) { | |
752 | case SNDRV_RAWMIDI_STREAM_OUTPUT: | |
753 | if (rfile->output == NULL) | |
754 | return -EINVAL; | |
755 | return snd_rawmidi_output_params(rfile->output, ¶ms); | |
756 | case SNDRV_RAWMIDI_STREAM_INPUT: | |
757 | if (rfile->input == NULL) | |
758 | return -EINVAL; | |
759 | return snd_rawmidi_input_params(rfile->input, ¶ms); | |
760 | default: | |
761 | return -EINVAL; | |
762 | } | |
763 | } | |
764 | case SNDRV_RAWMIDI_IOCTL_STATUS: | |
765 | { | |
766 | int err = 0; | |
48c9d417 TI |
767 | struct snd_rawmidi_status status; |
768 | if (copy_from_user(&status, argp, sizeof(struct snd_rawmidi_status))) | |
1da177e4 LT |
769 | return -EFAULT; |
770 | switch (status.stream) { | |
771 | case SNDRV_RAWMIDI_STREAM_OUTPUT: | |
772 | if (rfile->output == NULL) | |
773 | return -EINVAL; | |
774 | err = snd_rawmidi_output_status(rfile->output, &status); | |
775 | break; | |
776 | case SNDRV_RAWMIDI_STREAM_INPUT: | |
777 | if (rfile->input == NULL) | |
778 | return -EINVAL; | |
779 | err = snd_rawmidi_input_status(rfile->input, &status); | |
780 | break; | |
781 | default: | |
782 | return -EINVAL; | |
783 | } | |
784 | if (err < 0) | |
785 | return err; | |
48c9d417 | 786 | if (copy_to_user(argp, &status, sizeof(struct snd_rawmidi_status))) |
1da177e4 LT |
787 | return -EFAULT; |
788 | return 0; | |
789 | } | |
790 | case SNDRV_RAWMIDI_IOCTL_DROP: | |
791 | { | |
792 | int val; | |
793 | if (get_user(val, (int __user *) argp)) | |
794 | return -EFAULT; | |
795 | switch (val) { | |
796 | case SNDRV_RAWMIDI_STREAM_OUTPUT: | |
797 | if (rfile->output == NULL) | |
798 | return -EINVAL; | |
799 | return snd_rawmidi_drop_output(rfile->output); | |
800 | default: | |
801 | return -EINVAL; | |
802 | } | |
803 | } | |
804 | case SNDRV_RAWMIDI_IOCTL_DRAIN: | |
805 | { | |
806 | int val; | |
807 | if (get_user(val, (int __user *) argp)) | |
808 | return -EFAULT; | |
809 | switch (val) { | |
810 | case SNDRV_RAWMIDI_STREAM_OUTPUT: | |
811 | if (rfile->output == NULL) | |
812 | return -EINVAL; | |
813 | return snd_rawmidi_drain_output(rfile->output); | |
814 | case SNDRV_RAWMIDI_STREAM_INPUT: | |
815 | if (rfile->input == NULL) | |
816 | return -EINVAL; | |
817 | return snd_rawmidi_drain_input(rfile->input); | |
818 | default: | |
819 | return -EINVAL; | |
820 | } | |
821 | } | |
1da177e4 | 822 | default: |
ca20d292 TI |
823 | rmidi_dbg(rfile->rmidi, |
824 | "rawmidi: unknown command = 0x%x\n", cmd); | |
1da177e4 LT |
825 | } |
826 | return -ENOTTY; | |
827 | } | |
828 | ||
48c9d417 TI |
829 | static int snd_rawmidi_control_ioctl(struct snd_card *card, |
830 | struct snd_ctl_file *control, | |
1da177e4 LT |
831 | unsigned int cmd, |
832 | unsigned long arg) | |
833 | { | |
834 | void __user *argp = (void __user *)arg; | |
1da177e4 | 835 | |
1da177e4 LT |
836 | switch (cmd) { |
837 | case SNDRV_CTL_IOCTL_RAWMIDI_NEXT_DEVICE: | |
838 | { | |
839 | int device; | |
840 | ||
841 | if (get_user(device, (int __user *)argp)) | |
842 | return -EFAULT; | |
a7a13d06 DC |
843 | if (device >= SNDRV_RAWMIDI_DEVICES) /* next device is -1 */ |
844 | device = SNDRV_RAWMIDI_DEVICES - 1; | |
1a60d4c5 | 845 | mutex_lock(®ister_mutex); |
1da177e4 LT |
846 | device = device < 0 ? 0 : device + 1; |
847 | while (device < SNDRV_RAWMIDI_DEVICES) { | |
f87135f5 | 848 | if (snd_rawmidi_search(card, device)) |
1da177e4 LT |
849 | break; |
850 | device++; | |
851 | } | |
852 | if (device == SNDRV_RAWMIDI_DEVICES) | |
853 | device = -1; | |
1a60d4c5 | 854 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
855 | if (put_user(device, (int __user *)argp)) |
856 | return -EFAULT; | |
857 | return 0; | |
858 | } | |
859 | case SNDRV_CTL_IOCTL_RAWMIDI_PREFER_SUBDEVICE: | |
860 | { | |
861 | int val; | |
862 | ||
863 | if (get_user(val, (int __user *)argp)) | |
864 | return -EFAULT; | |
865 | control->prefer_rawmidi_subdevice = val; | |
866 | return 0; | |
867 | } | |
868 | case SNDRV_CTL_IOCTL_RAWMIDI_INFO: | |
869 | return snd_rawmidi_info_select_user(card, argp); | |
870 | } | |
871 | return -ENOIOCTLCMD; | |
872 | } | |
873 | ||
874 | /** | |
875 | * snd_rawmidi_receive - receive the input data from the device | |
876 | * @substream: the rawmidi substream | |
877 | * @buffer: the buffer pointer | |
878 | * @count: the data size to read | |
879 | * | |
880 | * Reads the data from the internal buffer. | |
881 | * | |
eb7c06e8 | 882 | * Return: The size of read data, or a negative error code on failure. |
1da177e4 | 883 | */ |
48c9d417 TI |
884 | int snd_rawmidi_receive(struct snd_rawmidi_substream *substream, |
885 | const unsigned char *buffer, int count) | |
1da177e4 LT |
886 | { |
887 | unsigned long flags; | |
888 | int result = 0, count1; | |
48c9d417 | 889 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
1da177e4 | 890 | |
219df32f TI |
891 | if (!substream->opened) |
892 | return -EBADFD; | |
1da177e4 | 893 | if (runtime->buffer == NULL) { |
ca20d292 TI |
894 | rmidi_dbg(substream->rmidi, |
895 | "snd_rawmidi_receive: input is not active!!!\n"); | |
1da177e4 LT |
896 | return -EINVAL; |
897 | } | |
898 | spin_lock_irqsave(&runtime->lock, flags); | |
899 | if (count == 1) { /* special case, faster code */ | |
900 | substream->bytes++; | |
901 | if (runtime->avail < runtime->buffer_size) { | |
902 | runtime->buffer[runtime->hw_ptr++] = buffer[0]; | |
903 | runtime->hw_ptr %= runtime->buffer_size; | |
904 | runtime->avail++; | |
905 | result++; | |
906 | } else { | |
907 | runtime->xruns++; | |
908 | } | |
909 | } else { | |
910 | substream->bytes += count; | |
911 | count1 = runtime->buffer_size - runtime->hw_ptr; | |
912 | if (count1 > count) | |
913 | count1 = count; | |
914 | if (count1 > (int)(runtime->buffer_size - runtime->avail)) | |
915 | count1 = runtime->buffer_size - runtime->avail; | |
916 | memcpy(runtime->buffer + runtime->hw_ptr, buffer, count1); | |
917 | runtime->hw_ptr += count1; | |
918 | runtime->hw_ptr %= runtime->buffer_size; | |
919 | runtime->avail += count1; | |
920 | count -= count1; | |
921 | result += count1; | |
922 | if (count > 0) { | |
923 | buffer += count1; | |
924 | count1 = count; | |
925 | if (count1 > (int)(runtime->buffer_size - runtime->avail)) { | |
926 | count1 = runtime->buffer_size - runtime->avail; | |
927 | runtime->xruns += count - count1; | |
928 | } | |
929 | if (count1 > 0) { | |
930 | memcpy(runtime->buffer, buffer, count1); | |
931 | runtime->hw_ptr = count1; | |
932 | runtime->avail += count1; | |
933 | result += count1; | |
934 | } | |
935 | } | |
936 | } | |
937 | if (result > 0) { | |
938 | if (runtime->event) | |
b3c705aa | 939 | schedule_work(&runtime->event_work); |
1da177e4 LT |
940 | else if (snd_rawmidi_ready(substream)) |
941 | wake_up(&runtime->sleep); | |
942 | } | |
943 | spin_unlock_irqrestore(&runtime->lock, flags); | |
944 | return result; | |
945 | } | |
6776a5d7 | 946 | EXPORT_SYMBOL(snd_rawmidi_receive); |
1da177e4 | 947 | |
48c9d417 | 948 | static long snd_rawmidi_kernel_read1(struct snd_rawmidi_substream *substream, |
17596a80 MÅš |
949 | unsigned char __user *userbuf, |
950 | unsigned char *kernelbuf, long count) | |
1da177e4 LT |
951 | { |
952 | unsigned long flags; | |
953 | long result = 0, count1; | |
48c9d417 | 954 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
1da177e4 LT |
955 | |
956 | while (count > 0 && runtime->avail) { | |
957 | count1 = runtime->buffer_size - runtime->appl_ptr; | |
958 | if (count1 > count) | |
959 | count1 = count; | |
960 | spin_lock_irqsave(&runtime->lock, flags); | |
961 | if (count1 > (int)runtime->avail) | |
962 | count1 = runtime->avail; | |
17596a80 MÅš |
963 | if (kernelbuf) |
964 | memcpy(kernelbuf + result, runtime->buffer + runtime->appl_ptr, count1); | |
965 | if (userbuf) { | |
1da177e4 | 966 | spin_unlock_irqrestore(&runtime->lock, flags); |
17596a80 | 967 | if (copy_to_user(userbuf + result, |
1da177e4 LT |
968 | runtime->buffer + runtime->appl_ptr, count1)) { |
969 | return result > 0 ? result : -EFAULT; | |
970 | } | |
971 | spin_lock_irqsave(&runtime->lock, flags); | |
972 | } | |
973 | runtime->appl_ptr += count1; | |
974 | runtime->appl_ptr %= runtime->buffer_size; | |
975 | runtime->avail -= count1; | |
976 | spin_unlock_irqrestore(&runtime->lock, flags); | |
977 | result += count1; | |
978 | count -= count1; | |
979 | } | |
980 | return result; | |
981 | } | |
982 | ||
48c9d417 TI |
983 | long snd_rawmidi_kernel_read(struct snd_rawmidi_substream *substream, |
984 | unsigned char *buf, long count) | |
1da177e4 LT |
985 | { |
986 | snd_rawmidi_input_trigger(substream, 1); | |
17596a80 | 987 | return snd_rawmidi_kernel_read1(substream, NULL/*userbuf*/, buf, count); |
1da177e4 | 988 | } |
6776a5d7 | 989 | EXPORT_SYMBOL(snd_rawmidi_kernel_read); |
1da177e4 | 990 | |
48c9d417 TI |
991 | static ssize_t snd_rawmidi_read(struct file *file, char __user *buf, size_t count, |
992 | loff_t *offset) | |
1da177e4 LT |
993 | { |
994 | long result; | |
995 | int count1; | |
48c9d417 TI |
996 | struct snd_rawmidi_file *rfile; |
997 | struct snd_rawmidi_substream *substream; | |
998 | struct snd_rawmidi_runtime *runtime; | |
1da177e4 LT |
999 | |
1000 | rfile = file->private_data; | |
1001 | substream = rfile->input; | |
1002 | if (substream == NULL) | |
1003 | return -EIO; | |
1004 | runtime = substream->runtime; | |
1005 | snd_rawmidi_input_trigger(substream, 1); | |
1006 | result = 0; | |
1007 | while (count > 0) { | |
1008 | spin_lock_irq(&runtime->lock); | |
1009 | while (!snd_rawmidi_ready(substream)) { | |
1010 | wait_queue_t wait; | |
1011 | if ((file->f_flags & O_NONBLOCK) != 0 || result > 0) { | |
1012 | spin_unlock_irq(&runtime->lock); | |
1013 | return result > 0 ? result : -EAGAIN; | |
1014 | } | |
1015 | init_waitqueue_entry(&wait, current); | |
1016 | add_wait_queue(&runtime->sleep, &wait); | |
1017 | set_current_state(TASK_INTERRUPTIBLE); | |
1018 | spin_unlock_irq(&runtime->lock); | |
1019 | schedule(); | |
1020 | remove_wait_queue(&runtime->sleep, &wait); | |
0914f796 TI |
1021 | if (rfile->rmidi->card->shutdown) |
1022 | return -ENODEV; | |
1da177e4 LT |
1023 | if (signal_pending(current)) |
1024 | return result > 0 ? result : -ERESTARTSYS; | |
1025 | if (!runtime->avail) | |
1026 | return result > 0 ? result : -EIO; | |
1027 | spin_lock_irq(&runtime->lock); | |
1028 | } | |
1029 | spin_unlock_irq(&runtime->lock); | |
4d23359b | 1030 | count1 = snd_rawmidi_kernel_read1(substream, |
17596a80 MÅš |
1031 | (unsigned char __user *)buf, |
1032 | NULL/*kernelbuf*/, | |
1033 | count); | |
1da177e4 LT |
1034 | if (count1 < 0) |
1035 | return result > 0 ? result : count1; | |
1036 | result += count1; | |
1037 | buf += count1; | |
1038 | count -= count1; | |
1039 | } | |
1040 | return result; | |
1041 | } | |
1042 | ||
1043 | /** | |
1044 | * snd_rawmidi_transmit_empty - check whether the output buffer is empty | |
1045 | * @substream: the rawmidi substream | |
eb7c06e8 YB |
1046 | * |
1047 | * Return: 1 if the internal output buffer is empty, 0 if not. | |
1da177e4 | 1048 | */ |
48c9d417 | 1049 | int snd_rawmidi_transmit_empty(struct snd_rawmidi_substream *substream) |
1da177e4 | 1050 | { |
48c9d417 | 1051 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
1da177e4 LT |
1052 | int result; |
1053 | unsigned long flags; | |
1054 | ||
1055 | if (runtime->buffer == NULL) { | |
ca20d292 TI |
1056 | rmidi_dbg(substream->rmidi, |
1057 | "snd_rawmidi_transmit_empty: output is not active!!!\n"); | |
1da177e4 LT |
1058 | return 1; |
1059 | } | |
1060 | spin_lock_irqsave(&runtime->lock, flags); | |
1061 | result = runtime->avail >= runtime->buffer_size; | |
1062 | spin_unlock_irqrestore(&runtime->lock, flags); | |
1063 | return result; | |
1064 | } | |
6776a5d7 | 1065 | EXPORT_SYMBOL(snd_rawmidi_transmit_empty); |
1da177e4 LT |
1066 | |
1067 | /** | |
1068 | * snd_rawmidi_transmit_peek - copy data from the internal buffer | |
1069 | * @substream: the rawmidi substream | |
1070 | * @buffer: the buffer pointer | |
1071 | * @count: data size to transfer | |
1072 | * | |
1073 | * Copies data from the internal output buffer to the given buffer. | |
1074 | * | |
1075 | * Call this in the interrupt handler when the midi output is ready, | |
1076 | * and call snd_rawmidi_transmit_ack() after the transmission is | |
1077 | * finished. | |
1078 | * | |
eb7c06e8 | 1079 | * Return: The size of copied data, or a negative error code on failure. |
1da177e4 | 1080 | */ |
48c9d417 TI |
1081 | int snd_rawmidi_transmit_peek(struct snd_rawmidi_substream *substream, |
1082 | unsigned char *buffer, int count) | |
1da177e4 LT |
1083 | { |
1084 | unsigned long flags; | |
1085 | int result, count1; | |
48c9d417 | 1086 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
1da177e4 LT |
1087 | |
1088 | if (runtime->buffer == NULL) { | |
ca20d292 TI |
1089 | rmidi_dbg(substream->rmidi, |
1090 | "snd_rawmidi_transmit_peek: output is not active!!!\n"); | |
1da177e4 LT |
1091 | return -EINVAL; |
1092 | } | |
1093 | result = 0; | |
1094 | spin_lock_irqsave(&runtime->lock, flags); | |
1095 | if (runtime->avail >= runtime->buffer_size) { | |
1096 | /* warning: lowlevel layer MUST trigger down the hardware */ | |
1097 | goto __skip; | |
1098 | } | |
1099 | if (count == 1) { /* special case, faster code */ | |
1100 | *buffer = runtime->buffer[runtime->hw_ptr]; | |
1101 | result++; | |
1102 | } else { | |
1103 | count1 = runtime->buffer_size - runtime->hw_ptr; | |
1104 | if (count1 > count) | |
1105 | count1 = count; | |
1106 | if (count1 > (int)(runtime->buffer_size - runtime->avail)) | |
1107 | count1 = runtime->buffer_size - runtime->avail; | |
1108 | memcpy(buffer, runtime->buffer + runtime->hw_ptr, count1); | |
1109 | count -= count1; | |
1110 | result += count1; | |
1111 | if (count > 0) { | |
1112 | if (count > (int)(runtime->buffer_size - runtime->avail - count1)) | |
1113 | count = runtime->buffer_size - runtime->avail - count1; | |
1114 | memcpy(buffer + count1, runtime->buffer, count); | |
1115 | result += count; | |
1116 | } | |
1117 | } | |
1118 | __skip: | |
1119 | spin_unlock_irqrestore(&runtime->lock, flags); | |
1120 | return result; | |
1121 | } | |
6776a5d7 | 1122 | EXPORT_SYMBOL(snd_rawmidi_transmit_peek); |
1da177e4 LT |
1123 | |
1124 | /** | |
1125 | * snd_rawmidi_transmit_ack - acknowledge the transmission | |
1126 | * @substream: the rawmidi substream | |
0a11458c | 1127 | * @count: the transferred count |
1da177e4 LT |
1128 | * |
1129 | * Advances the hardware pointer for the internal output buffer with | |
1130 | * the given size and updates the condition. | |
1131 | * Call after the transmission is finished. | |
1132 | * | |
eb7c06e8 | 1133 | * Return: The advanced size if successful, or a negative error code on failure. |
1da177e4 | 1134 | */ |
48c9d417 | 1135 | int snd_rawmidi_transmit_ack(struct snd_rawmidi_substream *substream, int count) |
1da177e4 LT |
1136 | { |
1137 | unsigned long flags; | |
48c9d417 | 1138 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
1da177e4 LT |
1139 | |
1140 | if (runtime->buffer == NULL) { | |
ca20d292 TI |
1141 | rmidi_dbg(substream->rmidi, |
1142 | "snd_rawmidi_transmit_ack: output is not active!!!\n"); | |
1da177e4 LT |
1143 | return -EINVAL; |
1144 | } | |
1145 | spin_lock_irqsave(&runtime->lock, flags); | |
7eaa943c | 1146 | snd_BUG_ON(runtime->avail + count > runtime->buffer_size); |
1da177e4 LT |
1147 | runtime->hw_ptr += count; |
1148 | runtime->hw_ptr %= runtime->buffer_size; | |
1149 | runtime->avail += count; | |
1150 | substream->bytes += count; | |
1151 | if (count > 0) { | |
1152 | if (runtime->drain || snd_rawmidi_ready(substream)) | |
1153 | wake_up(&runtime->sleep); | |
1154 | } | |
1155 | spin_unlock_irqrestore(&runtime->lock, flags); | |
1156 | return count; | |
1157 | } | |
6776a5d7 | 1158 | EXPORT_SYMBOL(snd_rawmidi_transmit_ack); |
1da177e4 LT |
1159 | |
1160 | /** | |
1161 | * snd_rawmidi_transmit - copy from the buffer to the device | |
1162 | * @substream: the rawmidi substream | |
df8db936 | 1163 | * @buffer: the buffer pointer |
1da177e4 LT |
1164 | * @count: the data size to transfer |
1165 | * | |
1166 | * Copies data from the buffer to the device and advances the pointer. | |
1167 | * | |
eb7c06e8 | 1168 | * Return: The copied size if successful, or a negative error code on failure. |
1da177e4 | 1169 | */ |
48c9d417 TI |
1170 | int snd_rawmidi_transmit(struct snd_rawmidi_substream *substream, |
1171 | unsigned char *buffer, int count) | |
1da177e4 | 1172 | { |
219df32f TI |
1173 | if (!substream->opened) |
1174 | return -EBADFD; | |
1da177e4 LT |
1175 | count = snd_rawmidi_transmit_peek(substream, buffer, count); |
1176 | if (count < 0) | |
1177 | return count; | |
1178 | return snd_rawmidi_transmit_ack(substream, count); | |
1179 | } | |
6776a5d7 | 1180 | EXPORT_SYMBOL(snd_rawmidi_transmit); |
1da177e4 | 1181 | |
48c9d417 | 1182 | static long snd_rawmidi_kernel_write1(struct snd_rawmidi_substream *substream, |
17596a80 MÅš |
1183 | const unsigned char __user *userbuf, |
1184 | const unsigned char *kernelbuf, | |
1185 | long count) | |
1da177e4 LT |
1186 | { |
1187 | unsigned long flags; | |
1188 | long count1, result; | |
48c9d417 | 1189 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
1da177e4 | 1190 | |
7eaa943c TI |
1191 | if (snd_BUG_ON(!kernelbuf && !userbuf)) |
1192 | return -EINVAL; | |
1193 | if (snd_BUG_ON(!runtime->buffer)) | |
1194 | return -EINVAL; | |
1da177e4 LT |
1195 | |
1196 | result = 0; | |
1197 | spin_lock_irqsave(&runtime->lock, flags); | |
1198 | if (substream->append) { | |
1199 | if ((long)runtime->avail < count) { | |
1200 | spin_unlock_irqrestore(&runtime->lock, flags); | |
1201 | return -EAGAIN; | |
1202 | } | |
1203 | } | |
1204 | while (count > 0 && runtime->avail > 0) { | |
1205 | count1 = runtime->buffer_size - runtime->appl_ptr; | |
1206 | if (count1 > count) | |
1207 | count1 = count; | |
1208 | if (count1 > (long)runtime->avail) | |
1209 | count1 = runtime->avail; | |
17596a80 MÅš |
1210 | if (kernelbuf) |
1211 | memcpy(runtime->buffer + runtime->appl_ptr, | |
1212 | kernelbuf + result, count1); | |
1213 | else if (userbuf) { | |
1da177e4 LT |
1214 | spin_unlock_irqrestore(&runtime->lock, flags); |
1215 | if (copy_from_user(runtime->buffer + runtime->appl_ptr, | |
17596a80 | 1216 | userbuf + result, count1)) { |
1da177e4 LT |
1217 | spin_lock_irqsave(&runtime->lock, flags); |
1218 | result = result > 0 ? result : -EFAULT; | |
1219 | goto __end; | |
1220 | } | |
1221 | spin_lock_irqsave(&runtime->lock, flags); | |
1222 | } | |
1223 | runtime->appl_ptr += count1; | |
1224 | runtime->appl_ptr %= runtime->buffer_size; | |
1225 | runtime->avail -= count1; | |
1226 | result += count1; | |
1da177e4 LT |
1227 | count -= count1; |
1228 | } | |
1229 | __end: | |
1230 | count1 = runtime->avail < runtime->buffer_size; | |
1231 | spin_unlock_irqrestore(&runtime->lock, flags); | |
1232 | if (count1) | |
1233 | snd_rawmidi_output_trigger(substream, 1); | |
1234 | return result; | |
1235 | } | |
1236 | ||
48c9d417 TI |
1237 | long snd_rawmidi_kernel_write(struct snd_rawmidi_substream *substream, |
1238 | const unsigned char *buf, long count) | |
1da177e4 | 1239 | { |
17596a80 | 1240 | return snd_rawmidi_kernel_write1(substream, NULL, buf, count); |
1da177e4 | 1241 | } |
6776a5d7 | 1242 | EXPORT_SYMBOL(snd_rawmidi_kernel_write); |
1da177e4 | 1243 | |
48c9d417 TI |
1244 | static ssize_t snd_rawmidi_write(struct file *file, const char __user *buf, |
1245 | size_t count, loff_t *offset) | |
1da177e4 LT |
1246 | { |
1247 | long result, timeout; | |
1248 | int count1; | |
48c9d417 TI |
1249 | struct snd_rawmidi_file *rfile; |
1250 | struct snd_rawmidi_runtime *runtime; | |
1251 | struct snd_rawmidi_substream *substream; | |
1da177e4 LT |
1252 | |
1253 | rfile = file->private_data; | |
1254 | substream = rfile->output; | |
1255 | runtime = substream->runtime; | |
1256 | /* we cannot put an atomic message to our buffer */ | |
1257 | if (substream->append && count > runtime->buffer_size) | |
1258 | return -EIO; | |
1259 | result = 0; | |
1260 | while (count > 0) { | |
1261 | spin_lock_irq(&runtime->lock); | |
1262 | while (!snd_rawmidi_ready_append(substream, count)) { | |
1263 | wait_queue_t wait; | |
1264 | if (file->f_flags & O_NONBLOCK) { | |
1265 | spin_unlock_irq(&runtime->lock); | |
1266 | return result > 0 ? result : -EAGAIN; | |
1267 | } | |
1268 | init_waitqueue_entry(&wait, current); | |
1269 | add_wait_queue(&runtime->sleep, &wait); | |
1270 | set_current_state(TASK_INTERRUPTIBLE); | |
1271 | spin_unlock_irq(&runtime->lock); | |
1272 | timeout = schedule_timeout(30 * HZ); | |
1273 | remove_wait_queue(&runtime->sleep, &wait); | |
0914f796 TI |
1274 | if (rfile->rmidi->card->shutdown) |
1275 | return -ENODEV; | |
1da177e4 LT |
1276 | if (signal_pending(current)) |
1277 | return result > 0 ? result : -ERESTARTSYS; | |
1278 | if (!runtime->avail && !timeout) | |
1279 | return result > 0 ? result : -EIO; | |
1280 | spin_lock_irq(&runtime->lock); | |
1281 | } | |
1282 | spin_unlock_irq(&runtime->lock); | |
17596a80 | 1283 | count1 = snd_rawmidi_kernel_write1(substream, buf, NULL, count); |
1da177e4 LT |
1284 | if (count1 < 0) |
1285 | return result > 0 ? result : count1; | |
1286 | result += count1; | |
1287 | buf += count1; | |
1288 | if ((size_t)count1 < count && (file->f_flags & O_NONBLOCK)) | |
1289 | break; | |
1290 | count -= count1; | |
1291 | } | |
6b2f3d1f | 1292 | if (file->f_flags & O_DSYNC) { |
1da177e4 LT |
1293 | spin_lock_irq(&runtime->lock); |
1294 | while (runtime->avail != runtime->buffer_size) { | |
1295 | wait_queue_t wait; | |
1296 | unsigned int last_avail = runtime->avail; | |
1297 | init_waitqueue_entry(&wait, current); | |
1298 | add_wait_queue(&runtime->sleep, &wait); | |
1299 | set_current_state(TASK_INTERRUPTIBLE); | |
1300 | spin_unlock_irq(&runtime->lock); | |
1301 | timeout = schedule_timeout(30 * HZ); | |
1302 | remove_wait_queue(&runtime->sleep, &wait); | |
1303 | if (signal_pending(current)) | |
1304 | return result > 0 ? result : -ERESTARTSYS; | |
1305 | if (runtime->avail == last_avail && !timeout) | |
1306 | return result > 0 ? result : -EIO; | |
1307 | spin_lock_irq(&runtime->lock); | |
1308 | } | |
1309 | spin_unlock_irq(&runtime->lock); | |
1310 | } | |
1311 | return result; | |
1312 | } | |
1313 | ||
1314 | static unsigned int snd_rawmidi_poll(struct file *file, poll_table * wait) | |
1315 | { | |
48c9d417 TI |
1316 | struct snd_rawmidi_file *rfile; |
1317 | struct snd_rawmidi_runtime *runtime; | |
1da177e4 LT |
1318 | unsigned int mask; |
1319 | ||
1320 | rfile = file->private_data; | |
1321 | if (rfile->input != NULL) { | |
1322 | runtime = rfile->input->runtime; | |
1323 | snd_rawmidi_input_trigger(rfile->input, 1); | |
1324 | poll_wait(file, &runtime->sleep, wait); | |
1325 | } | |
1326 | if (rfile->output != NULL) { | |
1327 | runtime = rfile->output->runtime; | |
1328 | poll_wait(file, &runtime->sleep, wait); | |
1329 | } | |
1330 | mask = 0; | |
1331 | if (rfile->input != NULL) { | |
1332 | if (snd_rawmidi_ready(rfile->input)) | |
1333 | mask |= POLLIN | POLLRDNORM; | |
1334 | } | |
1335 | if (rfile->output != NULL) { | |
1336 | if (snd_rawmidi_ready(rfile->output)) | |
1337 | mask |= POLLOUT | POLLWRNORM; | |
1338 | } | |
1339 | return mask; | |
1340 | } | |
1341 | ||
1342 | /* | |
1343 | */ | |
1344 | #ifdef CONFIG_COMPAT | |
1345 | #include "rawmidi_compat.c" | |
1346 | #else | |
1347 | #define snd_rawmidi_ioctl_compat NULL | |
1348 | #endif | |
1349 | ||
1350 | /* | |
1351 | ||
1352 | */ | |
1353 | ||
48c9d417 TI |
1354 | static void snd_rawmidi_proc_info_read(struct snd_info_entry *entry, |
1355 | struct snd_info_buffer *buffer) | |
1da177e4 | 1356 | { |
48c9d417 TI |
1357 | struct snd_rawmidi *rmidi; |
1358 | struct snd_rawmidi_substream *substream; | |
1359 | struct snd_rawmidi_runtime *runtime; | |
1da177e4 LT |
1360 | |
1361 | rmidi = entry->private_data; | |
1362 | snd_iprintf(buffer, "%s\n\n", rmidi->name); | |
1a60d4c5 | 1363 | mutex_lock(&rmidi->open_mutex); |
1da177e4 | 1364 | if (rmidi->info_flags & SNDRV_RAWMIDI_INFO_OUTPUT) { |
9244b2c3 JB |
1365 | list_for_each_entry(substream, |
1366 | &rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substreams, | |
1367 | list) { | |
1da177e4 LT |
1368 | snd_iprintf(buffer, |
1369 | "Output %d\n" | |
1370 | " Tx bytes : %lu\n", | |
1371 | substream->number, | |
1372 | (unsigned long) substream->bytes); | |
1373 | if (substream->opened) { | |
7584af10 CL |
1374 | snd_iprintf(buffer, |
1375 | " Owner PID : %d\n", | |
1376 | pid_vnr(substream->pid)); | |
1da177e4 LT |
1377 | runtime = substream->runtime; |
1378 | snd_iprintf(buffer, | |
1379 | " Mode : %s\n" | |
1380 | " Buffer size : %lu\n" | |
1381 | " Avail : %lu\n", | |
1382 | runtime->oss ? "OSS compatible" : "native", | |
1383 | (unsigned long) runtime->buffer_size, | |
1384 | (unsigned long) runtime->avail); | |
1385 | } | |
1386 | } | |
1387 | } | |
1388 | if (rmidi->info_flags & SNDRV_RAWMIDI_INFO_INPUT) { | |
9244b2c3 JB |
1389 | list_for_each_entry(substream, |
1390 | &rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substreams, | |
1391 | list) { | |
1da177e4 LT |
1392 | snd_iprintf(buffer, |
1393 | "Input %d\n" | |
1394 | " Rx bytes : %lu\n", | |
1395 | substream->number, | |
1396 | (unsigned long) substream->bytes); | |
1397 | if (substream->opened) { | |
7584af10 CL |
1398 | snd_iprintf(buffer, |
1399 | " Owner PID : %d\n", | |
1400 | pid_vnr(substream->pid)); | |
1da177e4 LT |
1401 | runtime = substream->runtime; |
1402 | snd_iprintf(buffer, | |
1403 | " Buffer size : %lu\n" | |
1404 | " Avail : %lu\n" | |
1405 | " Overruns : %lu\n", | |
1406 | (unsigned long) runtime->buffer_size, | |
1407 | (unsigned long) runtime->avail, | |
1408 | (unsigned long) runtime->xruns); | |
1409 | } | |
1410 | } | |
1411 | } | |
1a60d4c5 | 1412 | mutex_unlock(&rmidi->open_mutex); |
1da177e4 LT |
1413 | } |
1414 | ||
1415 | /* | |
1416 | * Register functions | |
1417 | */ | |
1418 | ||
9c2e08c5 | 1419 | static const struct file_operations snd_rawmidi_f_ops = |
1da177e4 LT |
1420 | { |
1421 | .owner = THIS_MODULE, | |
1422 | .read = snd_rawmidi_read, | |
1423 | .write = snd_rawmidi_write, | |
1424 | .open = snd_rawmidi_open, | |
1425 | .release = snd_rawmidi_release, | |
02f4865f | 1426 | .llseek = no_llseek, |
1da177e4 LT |
1427 | .poll = snd_rawmidi_poll, |
1428 | .unlocked_ioctl = snd_rawmidi_ioctl, | |
1429 | .compat_ioctl = snd_rawmidi_ioctl_compat, | |
1430 | }; | |
1431 | ||
48c9d417 TI |
1432 | static int snd_rawmidi_alloc_substreams(struct snd_rawmidi *rmidi, |
1433 | struct snd_rawmidi_str *stream, | |
1da177e4 LT |
1434 | int direction, |
1435 | int count) | |
1436 | { | |
48c9d417 | 1437 | struct snd_rawmidi_substream *substream; |
1da177e4 LT |
1438 | int idx; |
1439 | ||
1da177e4 | 1440 | for (idx = 0; idx < count; idx++) { |
ca2c0966 | 1441 | substream = kzalloc(sizeof(*substream), GFP_KERNEL); |
73e77ba0 | 1442 | if (substream == NULL) { |
ca20d292 | 1443 | rmidi_err(rmidi, "rawmidi: cannot allocate substream\n"); |
1da177e4 | 1444 | return -ENOMEM; |
73e77ba0 | 1445 | } |
1da177e4 LT |
1446 | substream->stream = direction; |
1447 | substream->number = idx; | |
1448 | substream->rmidi = rmidi; | |
1449 | substream->pstr = stream; | |
1450 | list_add_tail(&substream->list, &stream->substreams); | |
1451 | stream->substream_count++; | |
1452 | } | |
1453 | return 0; | |
1454 | } | |
1455 | ||
1456 | /** | |
1457 | * snd_rawmidi_new - create a rawmidi instance | |
1458 | * @card: the card instance | |
1459 | * @id: the id string | |
1460 | * @device: the device index | |
1461 | * @output_count: the number of output streams | |
1462 | * @input_count: the number of input streams | |
1463 | * @rrawmidi: the pointer to store the new rawmidi instance | |
1464 | * | |
1465 | * Creates a new rawmidi instance. | |
1466 | * Use snd_rawmidi_set_ops() to set the operators to the new instance. | |
1467 | * | |
eb7c06e8 | 1468 | * Return: Zero if successful, or a negative error code on failure. |
1da177e4 | 1469 | */ |
48c9d417 | 1470 | int snd_rawmidi_new(struct snd_card *card, char *id, int device, |
1da177e4 | 1471 | int output_count, int input_count, |
48c9d417 | 1472 | struct snd_rawmidi ** rrawmidi) |
1da177e4 | 1473 | { |
48c9d417 | 1474 | struct snd_rawmidi *rmidi; |
1da177e4 | 1475 | int err; |
48c9d417 | 1476 | static struct snd_device_ops ops = { |
1da177e4 LT |
1477 | .dev_free = snd_rawmidi_dev_free, |
1478 | .dev_register = snd_rawmidi_dev_register, | |
1479 | .dev_disconnect = snd_rawmidi_dev_disconnect, | |
1da177e4 LT |
1480 | }; |
1481 | ||
7eaa943c TI |
1482 | if (snd_BUG_ON(!card)) |
1483 | return -ENXIO; | |
1484 | if (rrawmidi) | |
1485 | *rrawmidi = NULL; | |
ca2c0966 | 1486 | rmidi = kzalloc(sizeof(*rmidi), GFP_KERNEL); |
73e77ba0 | 1487 | if (rmidi == NULL) { |
ca20d292 | 1488 | dev_err(card->dev, "rawmidi: cannot allocate\n"); |
1da177e4 | 1489 | return -ENOMEM; |
73e77ba0 | 1490 | } |
1da177e4 LT |
1491 | rmidi->card = card; |
1492 | rmidi->device = device; | |
1a60d4c5 | 1493 | mutex_init(&rmidi->open_mutex); |
1da177e4 | 1494 | init_waitqueue_head(&rmidi->open_wait); |
c13893d7 AM |
1495 | INIT_LIST_HEAD(&rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substreams); |
1496 | INIT_LIST_HEAD(&rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substreams); | |
1497 | ||
1da177e4 LT |
1498 | if (id != NULL) |
1499 | strlcpy(rmidi->id, id, sizeof(rmidi->id)); | |
73e77ba0 TI |
1500 | if ((err = snd_rawmidi_alloc_substreams(rmidi, |
1501 | &rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT], | |
1502 | SNDRV_RAWMIDI_STREAM_INPUT, | |
1503 | input_count)) < 0) { | |
1da177e4 LT |
1504 | snd_rawmidi_free(rmidi); |
1505 | return err; | |
1506 | } | |
73e77ba0 TI |
1507 | if ((err = snd_rawmidi_alloc_substreams(rmidi, |
1508 | &rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT], | |
1509 | SNDRV_RAWMIDI_STREAM_OUTPUT, | |
1510 | output_count)) < 0) { | |
1da177e4 LT |
1511 | snd_rawmidi_free(rmidi); |
1512 | return err; | |
1513 | } | |
1514 | if ((err = snd_device_new(card, SNDRV_DEV_RAWMIDI, rmidi, &ops)) < 0) { | |
1515 | snd_rawmidi_free(rmidi); | |
1516 | return err; | |
1517 | } | |
7eaa943c TI |
1518 | if (rrawmidi) |
1519 | *rrawmidi = rmidi; | |
1da177e4 LT |
1520 | return 0; |
1521 | } | |
6776a5d7 | 1522 | EXPORT_SYMBOL(snd_rawmidi_new); |
1da177e4 | 1523 | |
48c9d417 | 1524 | static void snd_rawmidi_free_substreams(struct snd_rawmidi_str *stream) |
1da177e4 | 1525 | { |
48c9d417 | 1526 | struct snd_rawmidi_substream *substream; |
1da177e4 LT |
1527 | |
1528 | while (!list_empty(&stream->substreams)) { | |
48c9d417 | 1529 | substream = list_entry(stream->substreams.next, struct snd_rawmidi_substream, list); |
1da177e4 LT |
1530 | list_del(&substream->list); |
1531 | kfree(substream); | |
1532 | } | |
1533 | } | |
1534 | ||
48c9d417 | 1535 | static int snd_rawmidi_free(struct snd_rawmidi *rmidi) |
1da177e4 | 1536 | { |
7eaa943c TI |
1537 | if (!rmidi) |
1538 | return 0; | |
c461482c TI |
1539 | |
1540 | snd_info_free_entry(rmidi->proc_entry); | |
1541 | rmidi->proc_entry = NULL; | |
1542 | mutex_lock(®ister_mutex); | |
1543 | if (rmidi->ops && rmidi->ops->dev_unregister) | |
1544 | rmidi->ops->dev_unregister(rmidi); | |
1545 | mutex_unlock(®ister_mutex); | |
1546 | ||
1da177e4 LT |
1547 | snd_rawmidi_free_substreams(&rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT]); |
1548 | snd_rawmidi_free_substreams(&rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT]); | |
1549 | if (rmidi->private_free) | |
1550 | rmidi->private_free(rmidi); | |
1551 | kfree(rmidi); | |
1552 | return 0; | |
1553 | } | |
1554 | ||
48c9d417 | 1555 | static int snd_rawmidi_dev_free(struct snd_device *device) |
1da177e4 | 1556 | { |
48c9d417 | 1557 | struct snd_rawmidi *rmidi = device->device_data; |
1da177e4 LT |
1558 | return snd_rawmidi_free(rmidi); |
1559 | } | |
1560 | ||
1561 | #if defined(CONFIG_SND_SEQUENCER) || (defined(MODULE) && defined(CONFIG_SND_SEQUENCER_MODULE)) | |
48c9d417 | 1562 | static void snd_rawmidi_dev_seq_free(struct snd_seq_device *device) |
1da177e4 | 1563 | { |
48c9d417 | 1564 | struct snd_rawmidi *rmidi = device->private_data; |
1da177e4 LT |
1565 | rmidi->seq_dev = NULL; |
1566 | } | |
1567 | #endif | |
1568 | ||
48c9d417 | 1569 | static int snd_rawmidi_dev_register(struct snd_device *device) |
1da177e4 | 1570 | { |
f87135f5 | 1571 | int err; |
48c9d417 | 1572 | struct snd_info_entry *entry; |
1da177e4 | 1573 | char name[16]; |
48c9d417 | 1574 | struct snd_rawmidi *rmidi = device->device_data; |
1da177e4 LT |
1575 | |
1576 | if (rmidi->device >= SNDRV_RAWMIDI_DEVICES) | |
1577 | return -ENOMEM; | |
1a60d4c5 | 1578 | mutex_lock(®ister_mutex); |
f87135f5 | 1579 | if (snd_rawmidi_search(rmidi->card, rmidi->device)) { |
1a60d4c5 | 1580 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
1581 | return -EBUSY; |
1582 | } | |
f87135f5 | 1583 | list_add_tail(&rmidi->list, &snd_rawmidi_devices); |
1da177e4 LT |
1584 | sprintf(name, "midiC%iD%i", rmidi->card->number, rmidi->device); |
1585 | if ((err = snd_register_device(SNDRV_DEVICE_TYPE_RAWMIDI, | |
1586 | rmidi->card, rmidi->device, | |
f87135f5 | 1587 | &snd_rawmidi_f_ops, rmidi, name)) < 0) { |
ca20d292 TI |
1588 | rmidi_err(rmidi, "unable to register rawmidi device %i:%i\n", |
1589 | rmidi->card->number, rmidi->device); | |
f87135f5 | 1590 | list_del(&rmidi->list); |
1a60d4c5 | 1591 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
1592 | return err; |
1593 | } | |
1594 | if (rmidi->ops && rmidi->ops->dev_register && | |
1595 | (err = rmidi->ops->dev_register(rmidi)) < 0) { | |
1596 | snd_unregister_device(SNDRV_DEVICE_TYPE_RAWMIDI, rmidi->card, rmidi->device); | |
f87135f5 | 1597 | list_del(&rmidi->list); |
1a60d4c5 | 1598 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
1599 | return err; |
1600 | } | |
1601 | #ifdef CONFIG_SND_OSSEMUL | |
1602 | rmidi->ossreg = 0; | |
1603 | if ((int)rmidi->device == midi_map[rmidi->card->number]) { | |
1604 | if (snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_MIDI, | |
f87135f5 | 1605 | rmidi->card, 0, &snd_rawmidi_f_ops, |
80d7d771 | 1606 | rmidi) < 0) { |
ca20d292 TI |
1607 | rmidi_err(rmidi, |
1608 | "unable to register OSS rawmidi device %i:%i\n", | |
1609 | rmidi->card->number, 0); | |
1da177e4 LT |
1610 | } else { |
1611 | rmidi->ossreg++; | |
1612 | #ifdef SNDRV_OSS_INFO_DEV_MIDI | |
1613 | snd_oss_info_register(SNDRV_OSS_INFO_DEV_MIDI, rmidi->card->number, rmidi->name); | |
1614 | #endif | |
1615 | } | |
1616 | } | |
1617 | if ((int)rmidi->device == amidi_map[rmidi->card->number]) { | |
1618 | if (snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_MIDI, | |
f87135f5 | 1619 | rmidi->card, 1, &snd_rawmidi_f_ops, |
80d7d771 | 1620 | rmidi) < 0) { |
ca20d292 TI |
1621 | rmidi_err(rmidi, |
1622 | "unable to register OSS rawmidi device %i:%i\n", | |
1623 | rmidi->card->number, 1); | |
1da177e4 LT |
1624 | } else { |
1625 | rmidi->ossreg++; | |
1626 | } | |
1627 | } | |
1628 | #endif /* CONFIG_SND_OSSEMUL */ | |
1a60d4c5 | 1629 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
1630 | sprintf(name, "midi%d", rmidi->device); |
1631 | entry = snd_info_create_card_entry(rmidi->card, name, rmidi->card->proc_root); | |
1632 | if (entry) { | |
1633 | entry->private_data = rmidi; | |
1da177e4 LT |
1634 | entry->c.text.read = snd_rawmidi_proc_info_read; |
1635 | if (snd_info_register(entry) < 0) { | |
1636 | snd_info_free_entry(entry); | |
1637 | entry = NULL; | |
1638 | } | |
1639 | } | |
1640 | rmidi->proc_entry = entry; | |
1641 | #if defined(CONFIG_SND_SEQUENCER) || (defined(MODULE) && defined(CONFIG_SND_SEQUENCER_MODULE)) | |
1642 | if (!rmidi->ops || !rmidi->ops->dev_register) { /* own registration mechanism */ | |
1643 | if (snd_seq_device_new(rmidi->card, rmidi->device, SNDRV_SEQ_DEV_ID_MIDISYNTH, 0, &rmidi->seq_dev) >= 0) { | |
1644 | rmidi->seq_dev->private_data = rmidi; | |
1645 | rmidi->seq_dev->private_free = snd_rawmidi_dev_seq_free; | |
1646 | sprintf(rmidi->seq_dev->name, "MIDI %d-%d", rmidi->card->number, rmidi->device); | |
1647 | snd_device_register(rmidi->card, rmidi->seq_dev); | |
1648 | } | |
1649 | } | |
1650 | #endif | |
1651 | return 0; | |
1652 | } | |
1653 | ||
48c9d417 | 1654 | static int snd_rawmidi_dev_disconnect(struct snd_device *device) |
1da177e4 | 1655 | { |
48c9d417 | 1656 | struct snd_rawmidi *rmidi = device->device_data; |
0914f796 | 1657 | int dir; |
1da177e4 | 1658 | |
1a60d4c5 | 1659 | mutex_lock(®ister_mutex); |
0914f796 TI |
1660 | mutex_lock(&rmidi->open_mutex); |
1661 | wake_up(&rmidi->open_wait); | |
f87135f5 | 1662 | list_del_init(&rmidi->list); |
0914f796 TI |
1663 | for (dir = 0; dir < 2; dir++) { |
1664 | struct snd_rawmidi_substream *s; | |
1665 | list_for_each_entry(s, &rmidi->streams[dir].substreams, list) { | |
1666 | if (s->runtime) | |
1667 | wake_up(&s->runtime->sleep); | |
1668 | } | |
1669 | } | |
1670 | ||
1da177e4 LT |
1671 | #ifdef CONFIG_SND_OSSEMUL |
1672 | if (rmidi->ossreg) { | |
1673 | if ((int)rmidi->device == midi_map[rmidi->card->number]) { | |
1674 | snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_MIDI, rmidi->card, 0); | |
1675 | #ifdef SNDRV_OSS_INFO_DEV_MIDI | |
1676 | snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_MIDI, rmidi->card->number); | |
1677 | #endif | |
1678 | } | |
1679 | if ((int)rmidi->device == amidi_map[rmidi->card->number]) | |
1680 | snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_MIDI, rmidi->card, 1); | |
1681 | rmidi->ossreg = 0; | |
1682 | } | |
1683 | #endif /* CONFIG_SND_OSSEMUL */ | |
1da177e4 | 1684 | snd_unregister_device(SNDRV_DEVICE_TYPE_RAWMIDI, rmidi->card, rmidi->device); |
0914f796 | 1685 | mutex_unlock(&rmidi->open_mutex); |
1a60d4c5 | 1686 | mutex_unlock(®ister_mutex); |
c461482c | 1687 | return 0; |
1da177e4 LT |
1688 | } |
1689 | ||
1690 | /** | |
1691 | * snd_rawmidi_set_ops - set the rawmidi operators | |
1692 | * @rmidi: the rawmidi instance | |
1693 | * @stream: the stream direction, SNDRV_RAWMIDI_STREAM_XXX | |
1694 | * @ops: the operator table | |
1695 | * | |
1696 | * Sets the rawmidi operators for the given stream direction. | |
1697 | */ | |
48c9d417 TI |
1698 | void snd_rawmidi_set_ops(struct snd_rawmidi *rmidi, int stream, |
1699 | struct snd_rawmidi_ops *ops) | |
1da177e4 | 1700 | { |
48c9d417 | 1701 | struct snd_rawmidi_substream *substream; |
1da177e4 | 1702 | |
9244b2c3 | 1703 | list_for_each_entry(substream, &rmidi->streams[stream].substreams, list) |
1da177e4 | 1704 | substream->ops = ops; |
1da177e4 | 1705 | } |
6776a5d7 | 1706 | EXPORT_SYMBOL(snd_rawmidi_set_ops); |
1da177e4 LT |
1707 | |
1708 | /* | |
1709 | * ENTRY functions | |
1710 | */ | |
1711 | ||
1712 | static int __init alsa_rawmidi_init(void) | |
1713 | { | |
1714 | ||
1715 | snd_ctl_register_ioctl(snd_rawmidi_control_ioctl); | |
1716 | snd_ctl_register_ioctl_compat(snd_rawmidi_control_ioctl); | |
1717 | #ifdef CONFIG_SND_OSSEMUL | |
1718 | { int i; | |
1719 | /* check device map table */ | |
1720 | for (i = 0; i < SNDRV_CARDS; i++) { | |
1721 | if (midi_map[i] < 0 || midi_map[i] >= SNDRV_RAWMIDI_DEVICES) { | |
ca20d292 TI |
1722 | pr_err("ALSA: rawmidi: invalid midi_map[%d] = %d\n", |
1723 | i, midi_map[i]); | |
1da177e4 LT |
1724 | midi_map[i] = 0; |
1725 | } | |
1726 | if (amidi_map[i] < 0 || amidi_map[i] >= SNDRV_RAWMIDI_DEVICES) { | |
ca20d292 TI |
1727 | pr_err("ALSA: rawmidi: invalid amidi_map[%d] = %d\n", |
1728 | i, amidi_map[i]); | |
1da177e4 LT |
1729 | amidi_map[i] = 1; |
1730 | } | |
1731 | } | |
1732 | } | |
1733 | #endif /* CONFIG_SND_OSSEMUL */ | |
1734 | return 0; | |
1735 | } | |
1736 | ||
1737 | static void __exit alsa_rawmidi_exit(void) | |
1738 | { | |
1739 | snd_ctl_unregister_ioctl(snd_rawmidi_control_ioctl); | |
1740 | snd_ctl_unregister_ioctl_compat(snd_rawmidi_control_ioctl); | |
1741 | } | |
1742 | ||
1743 | module_init(alsa_rawmidi_init) | |
1744 | module_exit(alsa_rawmidi_exit) |