blob: 6fc71a4c8a5177c63094333093de18a70b3159ac [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * Abstract layer for MIDI v1.0 stream
Jaroslav Kyselac1017a42007-10-15 09:50:19 +02003 * Copyright (c) by Jaroslav Kysela <perex@perex.cz>
Linus Torvalds1da177e2005-04-16 15:20:36 -07004 *
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
Linus Torvalds1da177e2005-04-16 15:20:36 -070022#include <sound/core.h>
23#include <linux/major.h>
24#include <linux/init.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070025#include <linux/sched.h>
26#include <linux/slab.h>
27#include <linux/time.h>
28#include <linux/wait.h>
Ingo Molnar1a60d4c2006-01-16 16:29:08 +010029#include <linux/mutex.h>
Paul Gortmaker65a77212011-07-15 13:13:37 -040030#include <linux/module.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070031#include <linux/delay.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070032#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
Jaroslav Kyselac1017a42007-10-15 09:50:19 +020038MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>");
Linus Torvalds1da177e2005-04-16 15:20:36 -070039MODULE_DESCRIPTION("Midlevel RawMidi code for ALSA.");
40MODULE_LICENSE("GPL");
41
42#ifdef CONFIG_SND_OSSEMUL
Takashi Iwai6581f4e2006-05-17 17:14:51 +020043static int midi_map[SNDRV_CARDS];
Linus Torvalds1da177e2005-04-16 15:20:36 -070044static int amidi_map[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS-1)] = 1};
45module_param_array(midi_map, int, NULL, 0444);
46MODULE_PARM_DESC(midi_map, "Raw MIDI device number assigned to 1st OSS device.");
47module_param_array(amidi_map, int, NULL, 0444);
48MODULE_PARM_DESC(amidi_map, "Raw MIDI device number assigned to 2nd OSS device.");
49#endif /* CONFIG_SND_OSSEMUL */
50
Takashi Iwai48c9d412005-11-17 13:56:51 +010051static int snd_rawmidi_free(struct snd_rawmidi *rawmidi);
52static int snd_rawmidi_dev_free(struct snd_device *device);
53static int snd_rawmidi_dev_register(struct snd_device *device);
54static int snd_rawmidi_dev_disconnect(struct snd_device *device);
Linus Torvalds1da177e2005-04-16 15:20:36 -070055
Clemens Ladischf87135f2005-11-20 14:06:59 +010056static LIST_HEAD(snd_rawmidi_devices);
Ingo Molnar1a60d4c2006-01-16 16:29:08 +010057static DEFINE_MUTEX(register_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -070058
Takashi Iwaica20d292014-02-04 18:21:39 +010059#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
Clemens Ladischf87135f2005-11-20 14:06:59 +010066static struct snd_rawmidi *snd_rawmidi_search(struct snd_card *card, int device)
67{
Clemens Ladischf87135f2005-11-20 14:06:59 +010068 struct snd_rawmidi *rawmidi;
69
Johannes Berg9244b2c2006-10-05 16:02:22 +020070 list_for_each_entry(rawmidi, &snd_rawmidi_devices, list)
Clemens Ladischf87135f2005-11-20 14:06:59 +010071 if (rawmidi->card == card && rawmidi->device == device)
72 return rawmidi;
Clemens Ladischf87135f2005-11-20 14:06:59 +010073 return NULL;
74}
75
Linus Torvalds1da177e2005-04-16 15:20:36 -070076static 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
Takashi Iwai48c9d412005-11-17 13:56:51 +010088static inline int snd_rawmidi_ready(struct snd_rawmidi_substream *substream)
Linus Torvalds1da177e2005-04-16 15:20:36 -070089{
Takashi Iwai48c9d412005-11-17 13:56:51 +010090 struct snd_rawmidi_runtime *runtime = substream->runtime;
Linus Torvalds1da177e2005-04-16 15:20:36 -070091 return runtime->avail >= runtime->avail_min;
92}
93
Takashi Iwai48c9d412005-11-17 13:56:51 +010094static inline int snd_rawmidi_ready_append(struct snd_rawmidi_substream *substream,
95 size_t count)
Linus Torvalds1da177e2005-04-16 15:20:36 -070096{
Takashi Iwai48c9d412005-11-17 13:56:51 +010097 struct snd_rawmidi_runtime *runtime = substream->runtime;
Linus Torvalds1da177e2005-04-16 15:20:36 -070098 return runtime->avail >= runtime->avail_min &&
99 (!substream->append || runtime->avail >= count);
100}
101
Takashi Iwaib3c705a2011-06-14 14:37:06 +0200102static void snd_rawmidi_input_event_work(struct work_struct *work)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700103{
Takashi Iwaib3c705a2011-06-14 14:37:06 +0200104 struct snd_rawmidi_runtime *runtime =
105 container_of(work, struct snd_rawmidi_runtime, event_work);
106 if (runtime->event)
107 runtime->event(runtime->substream);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700108}
109
Takashi Iwai48c9d412005-11-17 13:56:51 +0100110static int snd_rawmidi_runtime_create(struct snd_rawmidi_substream *substream)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700111{
Takashi Iwai48c9d412005-11-17 13:56:51 +0100112 struct snd_rawmidi_runtime *runtime;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700113
Takashi Iwaica2c0962005-09-09 14:20:23 +0200114 if ((runtime = kzalloc(sizeof(*runtime), GFP_KERNEL)) == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700115 return -ENOMEM;
Takashi Iwaib3c705a2011-06-14 14:37:06 +0200116 runtime->substream = substream;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700117 spin_lock_init(&runtime->lock);
118 init_waitqueue_head(&runtime->sleep);
Takashi Iwaib3c705a2011-06-14 14:37:06 +0200119 INIT_WORK(&runtime->event_work, snd_rawmidi_input_event_work);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700120 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
Takashi Iwai48c9d412005-11-17 13:56:51 +0100136static int snd_rawmidi_runtime_free(struct snd_rawmidi_substream *substream)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700137{
Takashi Iwai48c9d412005-11-17 13:56:51 +0100138 struct snd_rawmidi_runtime *runtime = substream->runtime;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700139
140 kfree(runtime->buffer);
141 kfree(runtime);
142 substream->runtime = NULL;
143 return 0;
144}
145
Takashi Iwai48c9d412005-11-17 13:56:51 +0100146static inline void snd_rawmidi_output_trigger(struct snd_rawmidi_substream *substream,int up)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700147{
Takashi Iwai219df322008-11-03 08:17:05 +0100148 if (!substream->opened)
149 return;
Takashi Iwaib3c705a2011-06-14 14:37:06 +0200150 substream->ops->trigger(substream, up);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700151}
152
Takashi Iwai48c9d412005-11-17 13:56:51 +0100153static void snd_rawmidi_input_trigger(struct snd_rawmidi_substream *substream, int up)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700154{
Takashi Iwai219df322008-11-03 08:17:05 +0100155 if (!substream->opened)
156 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700157 substream->ops->trigger(substream, up);
Takashi Iwaib3c705a2011-06-14 14:37:06 +0200158 if (!up)
159 cancel_work_sync(&substream->runtime->event_work);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700160}
161
Takashi Iwai48c9d412005-11-17 13:56:51 +0100162int snd_rawmidi_drop_output(struct snd_rawmidi_substream *substream)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700163{
164 unsigned long flags;
Takashi Iwai48c9d412005-11-17 13:56:51 +0100165 struct snd_rawmidi_runtime *runtime = substream->runtime;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700166
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}
Takashi Iwai6776a5d2014-02-27 16:00:17 +0100175EXPORT_SYMBOL(snd_rawmidi_drop_output);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700176
Takashi Iwai48c9d412005-11-17 13:56:51 +0100177int snd_rawmidi_drain_output(struct snd_rawmidi_substream *substream)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700178{
179 int err;
180 long timeout;
Takashi Iwai48c9d412005-11-17 13:56:51 +0100181 struct snd_rawmidi_runtime *runtime = substream->runtime;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700182
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) {
Takashi Iwaica20d292014-02-04 18:21:39 +0100191 rmidi_warn(substream->rmidi,
192 "rawmidi drain error (avail = %li, buffer_size = %li)\n",
193 (long)runtime->avail, (long)runtime->buffer_size);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700194 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}
Takashi Iwai6776a5d2014-02-27 16:00:17 +0100207EXPORT_SYMBOL(snd_rawmidi_drain_output);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700208
Takashi Iwai48c9d412005-11-17 13:56:51 +0100209int snd_rawmidi_drain_input(struct snd_rawmidi_substream *substream)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700210{
211 unsigned long flags;
Takashi Iwai48c9d412005-11-17 13:56:51 +0100212 struct snd_rawmidi_runtime *runtime = substream->runtime;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700213
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}
Takashi Iwai6776a5d2014-02-27 16:00:17 +0100222EXPORT_SYMBOL(snd_rawmidi_drain_input);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700223
Takashi Iwai9a1b64ca2009-02-11 17:03:49 +0100224/* look for an available substream for the given stream direction;
225 * if a specific subdevice is given, try to assign it
226 */
227static int assign_substream(struct snd_rawmidi *rmidi, int subdevice,
228 int stream, int mode,
229 struct snd_rawmidi_substream **sub_ret)
230{
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 };
237
238 if (!(rmidi->info_flags & info_flags[stream]))
239 return -ENXIO;
240 if (subdevice >= 0 && subdevice >= s->substream_count)
241 return -ENODEV;
Takashi Iwai9a1b64ca2009-02-11 17:03:49 +0100242
243 list_for_each_entry(substream, &s->substreams, list) {
244 if (substream->opened) {
245 if (stream == SNDRV_RAWMIDI_STREAM_INPUT ||
Clemens Ladisch16fb1092009-10-21 09:10:16 +0200246 !(mode & SNDRV_RAWMIDI_LFLG_APPEND) ||
247 !substream->append)
Takashi Iwai9a1b64ca2009-02-11 17:03:49 +0100248 continue;
249 }
250 if (subdevice < 0 || subdevice == substream->number) {
251 *sub_ret = substream;
252 return 0;
253 }
254 }
255 return -EAGAIN;
256}
257
258/* open and do ref-counting for the given substream */
259static int open_substream(struct snd_rawmidi *rmidi,
260 struct snd_rawmidi_substream *substream,
261 int mode)
262{
263 int err;
264
Clemens Ladisch8579d2d2009-10-21 09:09:38 +0200265 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);
Clemens Ladischb7fe7502009-10-21 09:11:43 +0200270 if (err < 0) {
271 snd_rawmidi_runtime_free(substream);
Clemens Ladisch8579d2d2009-10-21 09:09:38 +0200272 return err;
Clemens Ladischb7fe7502009-10-21 09:11:43 +0200273 }
Clemens Ladisch8579d2d2009-10-21 09:09:38 +0200274 substream->opened = 1;
Clemens Ladisch2d4b8422009-07-13 13:52:46 +0200275 substream->active_sensing = 0;
Clemens Ladisch8579d2d2009-10-21 09:09:38 +0200276 if (mode & SNDRV_RAWMIDI_LFLG_APPEND)
277 substream->append = 1;
Clemens Ladisch7584af12009-11-10 10:14:04 +0100278 substream->pid = get_pid(task_pid(current));
Clemens Ladisch91d12c42009-10-21 09:12:26 +0200279 rmidi->streams[substream->stream].substream_opened++;
Clemens Ladisch8579d2d2009-10-21 09:09:38 +0200280 }
281 substream->use_count++;
Takashi Iwai9a1b64ca2009-02-11 17:03:49 +0100282 return 0;
283}
284
285static void close_substream(struct snd_rawmidi *rmidi,
286 struct snd_rawmidi_substream *substream,
287 int cleanup);
288
289static 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;
296 if (mode & SNDRV_RAWMIDI_LFLG_INPUT) {
297 err = assign_substream(rmidi, subdevice,
298 SNDRV_RAWMIDI_STREAM_INPUT,
299 mode, &sinput);
300 if (err < 0)
Clemens Ladischb7fe7502009-10-21 09:11:43 +0200301 return err;
Takashi Iwai9a1b64ca2009-02-11 17:03:49 +0100302 }
303 if (mode & SNDRV_RAWMIDI_LFLG_OUTPUT) {
304 err = assign_substream(rmidi, subdevice,
305 SNDRV_RAWMIDI_STREAM_OUTPUT,
306 mode, &soutput);
307 if (err < 0)
Clemens Ladischb7fe7502009-10-21 09:11:43 +0200308 return err;
Takashi Iwai9a1b64ca2009-02-11 17:03:49 +0100309 }
310
311 if (sinput) {
312 err = open_substream(rmidi, sinput, mode);
313 if (err < 0)
Clemens Ladischb7fe7502009-10-21 09:11:43 +0200314 return err;
Takashi Iwai9a1b64ca2009-02-11 17:03:49 +0100315 }
316 if (soutput) {
317 err = open_substream(rmidi, soutput, mode);
318 if (err < 0) {
319 if (sinput)
320 close_substream(rmidi, sinput, 0);
Clemens Ladischb7fe7502009-10-21 09:11:43 +0200321 return err;
Takashi Iwai9a1b64ca2009-02-11 17:03:49 +0100322 }
323 }
324
325 rfile->rmidi = rmidi;
326 rfile->input = sinput;
327 rfile->output = soutput;
328 return 0;
Takashi Iwai9a1b64ca2009-02-11 17:03:49 +0100329}
330
331/* called from sound/core/seq/seq_midi.c */
Clemens Ladischf87135f2005-11-20 14:06:59 +0100332int snd_rawmidi_kernel_open(struct snd_card *card, int device, int subdevice,
Takashi Iwai48c9d412005-11-17 13:56:51 +0100333 int mode, struct snd_rawmidi_file * rfile)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700334{
Takashi Iwai48c9d412005-11-17 13:56:51 +0100335 struct snd_rawmidi *rmidi;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700336 int err;
337
Takashi Iwai9a1b64ca2009-02-11 17:03:49 +0100338 if (snd_BUG_ON(!rfile))
339 return -EINVAL;
340
Ingo Molnar1a60d4c2006-01-16 16:29:08 +0100341 mutex_lock(&register_mutex);
Clemens Ladischf87135f2005-11-20 14:06:59 +0100342 rmidi = snd_rawmidi_search(card, device);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700343 if (rmidi == NULL) {
Takashi Iwaif9d20282009-02-11 14:55:59 +0100344 mutex_unlock(&register_mutex);
345 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700346 }
347 if (!try_module_get(rmidi->card->module)) {
Takashi Iwaif9d20282009-02-11 14:55:59 +0100348 mutex_unlock(&register_mutex);
349 return -ENXIO;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700350 }
Takashi Iwaif9d20282009-02-11 14:55:59 +0100351 mutex_unlock(&register_mutex);
352
Takashi Iwai9a1b64ca2009-02-11 17:03:49 +0100353 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);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700358 return err;
359}
Takashi Iwai6776a5d2014-02-27 16:00:17 +0100360EXPORT_SYMBOL(snd_rawmidi_kernel_open);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700361
362static int snd_rawmidi_open(struct inode *inode, struct file *file)
363{
364 int maj = imajor(inode);
Takashi Iwai48c9d412005-11-17 13:56:51 +0100365 struct snd_card *card;
Clemens Ladischf87135f2005-11-20 14:06:59 +0100366 int subdevice;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700367 unsigned short fflags;
368 int err;
Takashi Iwai48c9d412005-11-17 13:56:51 +0100369 struct snd_rawmidi *rmidi;
Takashi Iwai9a1b64ca2009-02-11 17:03:49 +0100370 struct snd_rawmidi_file *rawmidi_file = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700371 wait_queue_t wait;
Takashi Iwai48c9d412005-11-17 13:56:51 +0100372 struct snd_ctl_file *kctl;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700373
Takashi Iwai9a1b64ca2009-02-11 17:03:49 +0100374 if ((file->f_flags & O_APPEND) && !(file->f_flags & O_NONBLOCK))
375 return -EINVAL; /* invalid combination */
376
Takashi Iwai02f48652010-04-13 11:49:04 +0200377 err = nonseekable_open(inode, file);
378 if (err < 0)
379 return err;
380
Clemens Ladischf1902862005-10-24 17:05:03 +0200381 if (maj == snd_major) {
Clemens Ladischf87135f2005-11-20 14:06:59 +0100382 rmidi = snd_lookup_minor_data(iminor(inode),
383 SNDRV_DEVICE_TYPE_RAWMIDI);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700384#ifdef CONFIG_SND_OSSEMUL
Clemens Ladischf1902862005-10-24 17:05:03 +0200385 } else if (maj == SOUND_MAJOR) {
Clemens Ladischf87135f2005-11-20 14:06:59 +0100386 rmidi = snd_lookup_oss_minor_data(iminor(inode),
387 SNDRV_OSS_DEVICE_TYPE_MIDI);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700388#endif
Clemens Ladischf1902862005-10-24 17:05:03 +0200389 } else
Linus Torvalds1da177e2005-04-16 15:20:36 -0700390 return -ENXIO;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700391
Linus Torvalds1da177e2005-04-16 15:20:36 -0700392 if (rmidi == NULL)
393 return -ENODEV;
Takashi Iwai9a1b64ca2009-02-11 17:03:49 +0100394
Takashi Iwaia0830db2012-10-16 13:05:59 +0200395 if (!try_module_get(rmidi->card->module)) {
396 snd_card_unref(rmidi->card);
Takashi Iwai9a1b64ca2009-02-11 17:03:49 +0100397 return -ENXIO;
Takashi Iwaia0830db2012-10-16 13:05:59 +0200398 }
Takashi Iwai9a1b64ca2009-02-11 17:03:49 +0100399
400 mutex_lock(&rmidi->open_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700401 card = rmidi->card;
402 err = snd_card_file_add(card, file);
403 if (err < 0)
Takashi Iwai9a1b64ca2009-02-11 17:03:49 +0100404 goto __error_card;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700405 fflags = snd_rawmidi_file_flags(file);
Clemens Ladischf1902862005-10-24 17:05:03 +0200406 if ((file->f_flags & O_APPEND) || maj == SOUND_MAJOR) /* OSS emul? */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700407 fflags |= SNDRV_RAWMIDI_LFLG_APPEND;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700408 rawmidi_file = kmalloc(sizeof(*rawmidi_file), GFP_KERNEL);
409 if (rawmidi_file == NULL) {
Takashi Iwai9a1b64ca2009-02-11 17:03:49 +0100410 err = -ENOMEM;
411 goto __error;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700412 }
413 init_waitqueue_entry(&wait, current);
414 add_wait_queue(&rmidi->open_wait, &wait);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700415 while (1) {
416 subdevice = -1;
Takashi Iwai399ccdc2008-09-25 14:51:03 +0200417 read_lock(&card->ctl_files_rwlock);
Johannes Berg9244b2c2006-10-05 16:02:22 +0200418 list_for_each_entry(kctl, &card->ctl_files, list) {
Clemens Ladisch25d27ed2009-11-02 09:35:44 +0100419 if (kctl->pid == task_pid(current)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700420 subdevice = kctl->prefer_rawmidi_subdevice;
Takashi Iwai2529bba2006-08-04 12:57:19 +0200421 if (subdevice != -1)
422 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700423 }
424 }
Takashi Iwai399ccdc2008-09-25 14:51:03 +0200425 read_unlock(&card->ctl_files_rwlock);
Takashi Iwai9a1b64ca2009-02-11 17:03:49 +0100426 err = rawmidi_open_priv(rmidi, subdevice, fflags, rawmidi_file);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700427 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);
Ingo Molnar1a60d4c2006-01-16 16:29:08 +0100437 mutex_unlock(&rmidi->open_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700438 schedule();
Ingo Molnar1a60d4c2006-01-16 16:29:08 +0100439 mutex_lock(&rmidi->open_mutex);
Takashi Iwai0914f792012-10-16 16:43:39 +0200440 if (rmidi->card->shutdown) {
441 err = -ENODEV;
442 break;
443 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700444 if (signal_pending(current)) {
445 err = -ERESTARTSYS;
446 break;
447 }
448 }
Takashi Iwai9a1b64ca2009-02-11 17:03:49 +0100449 remove_wait_queue(&rmidi->open_wait, &wait);
450 if (err < 0) {
451 kfree(rawmidi_file);
452 goto __error;
453 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700454#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
Takashi Iwai9a1b64ca2009-02-11 17:03:49 +0100460 file->private_data = rawmidi_file;
Ingo Molnar1a60d4c2006-01-16 16:29:08 +0100461 mutex_unlock(&rmidi->open_mutex);
Takashi Iwaia0830db2012-10-16 13:05:59 +0200462 snd_card_unref(rmidi->card);
Takashi Iwai9a1b64ca2009-02-11 17:03:49 +0100463 return 0;
464
465 __error:
466 snd_card_file_remove(card, file);
467 __error_card:
468 mutex_unlock(&rmidi->open_mutex);
469 module_put(rmidi->card->module);
Takashi Iwaia0830db2012-10-16 13:05:59 +0200470 snd_card_unref(rmidi->card);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700471 return err;
472}
473
Takashi Iwai9a1b64ca2009-02-11 17:03:49 +0100474static void close_substream(struct snd_rawmidi *rmidi,
475 struct snd_rawmidi_substream *substream,
476 int cleanup)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700477{
Takashi Iwai9a1b64ca2009-02-11 17:03:49 +0100478 if (--substream->use_count)
479 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700480
Takashi Iwai9a1b64ca2009-02-11 17:03:49 +0100481 if (cleanup) {
482 if (substream->stream == SNDRV_RAWMIDI_STREAM_INPUT)
483 snd_rawmidi_input_trigger(substream, 0);
484 else {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700485 if (substream->active_sensing) {
486 unsigned char buf = 0xfe;
Takashi Iwai9a1b64ca2009-02-11 17:03:49 +0100487 /* sending single active sensing message
488 * to shut the device up
489 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700490 snd_rawmidi_kernel_write(substream, &buf, 1);
491 }
492 if (snd_rawmidi_drain_output(substream) == -ERESTARTSYS)
493 snd_rawmidi_output_trigger(substream, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700494 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700495 }
Takashi Iwai9a1b64ca2009-02-11 17:03:49 +0100496 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;
Clemens Ladisch7584af12009-11-10 10:14:04 +0100502 put_pid(substream->pid);
503 substream->pid = NULL;
Clemens Ladisch91d12c42009-10-21 09:12:26 +0200504 rmidi->streams[substream->stream].substream_opened--;
Takashi Iwai9a1b64ca2009-02-11 17:03:49 +0100505}
506
507static 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;
Ingo Molnar1a60d4c2006-01-16 16:29:08 +0100522 mutex_unlock(&rmidi->open_mutex);
Takashi Iwai9a1b64ca2009-02-11 17:03:49 +0100523 wake_up(&rmidi->open_wait);
524}
525
526/* called from sound/core/seq/seq_midi.c */
527int 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);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700536 module_put(rmidi->card->module);
537 return 0;
538}
Takashi Iwai6776a5d2014-02-27 16:00:17 +0100539EXPORT_SYMBOL(snd_rawmidi_kernel_release);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700540
541static int snd_rawmidi_release(struct inode *inode, struct file *file)
542{
Takashi Iwai48c9d412005-11-17 13:56:51 +0100543 struct snd_rawmidi_file *rfile;
544 struct snd_rawmidi *rmidi;
Clemens Ladischaa73aec2010-10-15 12:06:18 +0200545 struct module *module;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700546
547 rfile = file->private_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700548 rmidi = rfile->rmidi;
Takashi Iwai9a1b64ca2009-02-11 17:03:49 +0100549 rawmidi_release_priv(rfile);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700550 kfree(rfile);
Clemens Ladischaa73aec2010-10-15 12:06:18 +0200551 module = rmidi->card->module;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700552 snd_card_file_remove(rmidi->card, file);
Clemens Ladischaa73aec2010-10-15 12:06:18 +0200553 module_put(module);
Takashi Iwai9a1b64ca2009-02-11 17:03:49 +0100554 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700555}
556
Adrian Bunk18612042005-11-23 13:14:50 +0100557static int snd_rawmidi_info(struct snd_rawmidi_substream *substream,
558 struct snd_rawmidi_info *info)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700559{
Takashi Iwai48c9d412005-11-17 13:56:51 +0100560 struct snd_rawmidi *rmidi;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700561
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
Takashi Iwai48c9d412005-11-17 13:56:51 +0100580static int snd_rawmidi_info_user(struct snd_rawmidi_substream *substream,
581 struct snd_rawmidi_info __user * _info)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700582{
Takashi Iwai48c9d412005-11-17 13:56:51 +0100583 struct snd_rawmidi_info info;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700584 int err;
585 if ((err = snd_rawmidi_info(substream, &info)) < 0)
586 return err;
Takashi Iwai48c9d412005-11-17 13:56:51 +0100587 if (copy_to_user(_info, &info, sizeof(struct snd_rawmidi_info)))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700588 return -EFAULT;
589 return 0;
590}
591
Takashi Iwai48c9d412005-11-17 13:56:51 +0100592int snd_rawmidi_info_select(struct snd_card *card, struct snd_rawmidi_info *info)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700593{
Takashi Iwai48c9d412005-11-17 13:56:51 +0100594 struct snd_rawmidi *rmidi;
595 struct snd_rawmidi_str *pstr;
596 struct snd_rawmidi_substream *substream;
Clemens Ladischf87135f2005-11-20 14:06:59 +0100597
Ingo Molnar1a60d4c2006-01-16 16:29:08 +0100598 mutex_lock(&register_mutex);
Clemens Ladischf87135f2005-11-20 14:06:59 +0100599 rmidi = snd_rawmidi_search(card, info->device);
Ingo Molnar1a60d4c2006-01-16 16:29:08 +0100600 mutex_unlock(&register_mutex);
Clemens Ladischa106cd32005-11-20 13:59:56 +0100601 if (!rmidi)
602 return -ENXIO;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700603 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;
Johannes Berg9244b2c2006-10-05 16:02:22 +0200610 list_for_each_entry(substream, &pstr->substreams, list) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700611 if ((unsigned int)substream->number == info->subdevice)
612 return snd_rawmidi_info(substream, info);
613 }
614 return -ENXIO;
615}
Takashi Iwai6776a5d2014-02-27 16:00:17 +0100616EXPORT_SYMBOL(snd_rawmidi_info_select);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700617
Takashi Iwai48c9d412005-11-17 13:56:51 +0100618static int snd_rawmidi_info_select_user(struct snd_card *card,
619 struct snd_rawmidi_info __user *_info)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700620{
621 int err;
Takashi Iwai48c9d412005-11-17 13:56:51 +0100622 struct snd_rawmidi_info info;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700623 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;
Takashi Iwai48c9d412005-11-17 13:56:51 +0100631 if (copy_to_user(_info, &info, sizeof(struct snd_rawmidi_info)))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700632 return -EFAULT;
633 return 0;
634}
635
Takashi Iwai48c9d412005-11-17 13:56:51 +0100636int snd_rawmidi_output_params(struct snd_rawmidi_substream *substream,
637 struct snd_rawmidi_params * params)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700638{
639 char *newbuf;
Takashi Iwai48c9d412005-11-17 13:56:51 +0100640 struct snd_rawmidi_runtime *runtime = substream->runtime;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700641
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) {
Takashi Iwai3101ba02011-07-12 08:05:16 +0200652 newbuf = krealloc(runtime->buffer, params->buffer_size,
653 GFP_KERNEL);
Jesper Juhl4fa95ef2006-03-28 01:56:54 -0800654 if (!newbuf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700655 return -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700656 runtime->buffer = newbuf;
657 runtime->buffer_size = params->buffer_size;
Clemens Ladisch1b98ea42005-11-21 07:31:31 +0100658 runtime->avail = runtime->buffer_size;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700659 }
660 runtime->avail_min = params->avail_min;
661 substream->active_sensing = !params->no_active_sensing;
662 return 0;
663}
Takashi Iwai6776a5d2014-02-27 16:00:17 +0100664EXPORT_SYMBOL(snd_rawmidi_output_params);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700665
Takashi Iwai48c9d412005-11-17 13:56:51 +0100666int snd_rawmidi_input_params(struct snd_rawmidi_substream *substream,
667 struct snd_rawmidi_params * params)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700668{
669 char *newbuf;
Takashi Iwai48c9d412005-11-17 13:56:51 +0100670 struct snd_rawmidi_runtime *runtime = substream->runtime;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700671
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) {
Takashi Iwai3101ba02011-07-12 08:05:16 +0200680 newbuf = krealloc(runtime->buffer, params->buffer_size,
681 GFP_KERNEL);
Jesper Juhl4fa95ef2006-03-28 01:56:54 -0800682 if (!newbuf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700683 return -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700684 runtime->buffer = newbuf;
685 runtime->buffer_size = params->buffer_size;
686 }
687 runtime->avail_min = params->avail_min;
688 return 0;
689}
Takashi Iwai6776a5d2014-02-27 16:00:17 +0100690EXPORT_SYMBOL(snd_rawmidi_input_params);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700691
Takashi Iwai48c9d412005-11-17 13:56:51 +0100692static int snd_rawmidi_output_status(struct snd_rawmidi_substream *substream,
693 struct snd_rawmidi_status * status)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700694{
Takashi Iwai48c9d412005-11-17 13:56:51 +0100695 struct snd_rawmidi_runtime *runtime = substream->runtime;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700696
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
Takashi Iwai48c9d412005-11-17 13:56:51 +0100705static int snd_rawmidi_input_status(struct snd_rawmidi_substream *substream,
706 struct snd_rawmidi_status * status)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700707{
Takashi Iwai48c9d412005-11-17 13:56:51 +0100708 struct snd_rawmidi_runtime *runtime = substream->runtime;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700709
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
720static long snd_rawmidi_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
721{
Takashi Iwai48c9d412005-11-17 13:56:51 +0100722 struct snd_rawmidi_file *rfile;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700723 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 {
Takashi Iwai48c9d412005-11-17 13:56:51 +0100733 int stream;
734 struct snd_rawmidi_info __user *info = argp;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700735 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 {
Takashi Iwai48c9d412005-11-17 13:56:51 +0100748 struct snd_rawmidi_params params;
749 if (copy_from_user(&params, argp, sizeof(struct snd_rawmidi_params)))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700750 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, &params);
756 case SNDRV_RAWMIDI_STREAM_INPUT:
757 if (rfile->input == NULL)
758 return -EINVAL;
759 return snd_rawmidi_input_params(rfile->input, &params);
760 default:
761 return -EINVAL;
762 }
763 }
764 case SNDRV_RAWMIDI_IOCTL_STATUS:
765 {
766 int err = 0;
Takashi Iwai48c9d412005-11-17 13:56:51 +0100767 struct snd_rawmidi_status status;
768 if (copy_from_user(&status, argp, sizeof(struct snd_rawmidi_status)))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700769 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;
Takashi Iwai48c9d412005-11-17 13:56:51 +0100786 if (copy_to_user(argp, &status, sizeof(struct snd_rawmidi_status)))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700787 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 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700822 default:
Takashi Iwaica20d292014-02-04 18:21:39 +0100823 rmidi_dbg(rfile->rmidi,
824 "rawmidi: unknown command = 0x%x\n", cmd);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700825 }
826 return -ENOTTY;
827}
828
Takashi Iwai48c9d412005-11-17 13:56:51 +0100829static int snd_rawmidi_control_ioctl(struct snd_card *card,
830 struct snd_ctl_file *control,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700831 unsigned int cmd,
832 unsigned long arg)
833{
834 void __user *argp = (void __user *)arg;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700835
Linus Torvalds1da177e2005-04-16 15:20:36 -0700836 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;
Dan Carpentera7a13d02010-09-09 00:11:41 +0200843 if (device >= SNDRV_RAWMIDI_DEVICES) /* next device is -1 */
844 device = SNDRV_RAWMIDI_DEVICES - 1;
Ingo Molnar1a60d4c2006-01-16 16:29:08 +0100845 mutex_lock(&register_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700846 device = device < 0 ? 0 : device + 1;
847 while (device < SNDRV_RAWMIDI_DEVICES) {
Clemens Ladischf87135f2005-11-20 14:06:59 +0100848 if (snd_rawmidi_search(card, device))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700849 break;
850 device++;
851 }
852 if (device == SNDRV_RAWMIDI_DEVICES)
853 device = -1;
Ingo Molnar1a60d4c2006-01-16 16:29:08 +0100854 mutex_unlock(&register_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700855 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 *
Yacine Belkadieb7c06e2013-03-11 22:05:14 +0100882 * Return: The size of read data, or a negative error code on failure.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700883 */
Takashi Iwai48c9d412005-11-17 13:56:51 +0100884int snd_rawmidi_receive(struct snd_rawmidi_substream *substream,
885 const unsigned char *buffer, int count)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700886{
887 unsigned long flags;
888 int result = 0, count1;
Takashi Iwai48c9d412005-11-17 13:56:51 +0100889 struct snd_rawmidi_runtime *runtime = substream->runtime;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700890
Takashi Iwai219df322008-11-03 08:17:05 +0100891 if (!substream->opened)
892 return -EBADFD;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700893 if (runtime->buffer == NULL) {
Takashi Iwaica20d292014-02-04 18:21:39 +0100894 rmidi_dbg(substream->rmidi,
895 "snd_rawmidi_receive: input is not active!!!\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700896 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)
Takashi Iwaib3c705a2011-06-14 14:37:06 +0200939 schedule_work(&runtime->event_work);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700940 else if (snd_rawmidi_ready(substream))
941 wake_up(&runtime->sleep);
942 }
943 spin_unlock_irqrestore(&runtime->lock, flags);
944 return result;
945}
Takashi Iwai6776a5d2014-02-27 16:00:17 +0100946EXPORT_SYMBOL(snd_rawmidi_receive);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700947
Takashi Iwai48c9d412005-11-17 13:56:51 +0100948static long snd_rawmidi_kernel_read1(struct snd_rawmidi_substream *substream,
Marcin Åšlusarz17596a82008-01-09 17:56:07 +0100949 unsigned char __user *userbuf,
950 unsigned char *kernelbuf, long count)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700951{
952 unsigned long flags;
953 long result = 0, count1;
Takashi Iwai48c9d412005-11-17 13:56:51 +0100954 struct snd_rawmidi_runtime *runtime = substream->runtime;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700955
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;
Marcin Åšlusarz17596a82008-01-09 17:56:07 +0100963 if (kernelbuf)
964 memcpy(kernelbuf + result, runtime->buffer + runtime->appl_ptr, count1);
965 if (userbuf) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700966 spin_unlock_irqrestore(&runtime->lock, flags);
Marcin Åšlusarz17596a82008-01-09 17:56:07 +0100967 if (copy_to_user(userbuf + result,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700968 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
Takashi Iwai48c9d412005-11-17 13:56:51 +0100983long snd_rawmidi_kernel_read(struct snd_rawmidi_substream *substream,
984 unsigned char *buf, long count)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700985{
986 snd_rawmidi_input_trigger(substream, 1);
Marcin Åšlusarz17596a82008-01-09 17:56:07 +0100987 return snd_rawmidi_kernel_read1(substream, NULL/*userbuf*/, buf, count);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700988}
Takashi Iwai6776a5d2014-02-27 16:00:17 +0100989EXPORT_SYMBOL(snd_rawmidi_kernel_read);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700990
Takashi Iwai48c9d412005-11-17 13:56:51 +0100991static ssize_t snd_rawmidi_read(struct file *file, char __user *buf, size_t count,
992 loff_t *offset)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700993{
994 long result;
995 int count1;
Takashi Iwai48c9d412005-11-17 13:56:51 +0100996 struct snd_rawmidi_file *rfile;
997 struct snd_rawmidi_substream *substream;
998 struct snd_rawmidi_runtime *runtime;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700999
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);
Takashi Iwai0914f792012-10-16 16:43:39 +02001021 if (rfile->rmidi->card->shutdown)
1022 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001023 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);
Clemens Ladisch4d233592005-09-05 10:35:20 +02001030 count1 = snd_rawmidi_kernel_read1(substream,
Marcin Åšlusarz17596a82008-01-09 17:56:07 +01001031 (unsigned char __user *)buf,
1032 NULL/*kernelbuf*/,
1033 count);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001034 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
Yacine Belkadieb7c06e2013-03-11 22:05:14 +01001046 *
1047 * Return: 1 if the internal output buffer is empty, 0 if not.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001048 */
Takashi Iwai48c9d412005-11-17 13:56:51 +01001049int snd_rawmidi_transmit_empty(struct snd_rawmidi_substream *substream)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001050{
Takashi Iwai48c9d412005-11-17 13:56:51 +01001051 struct snd_rawmidi_runtime *runtime = substream->runtime;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001052 int result;
1053 unsigned long flags;
1054
1055 if (runtime->buffer == NULL) {
Takashi Iwaica20d292014-02-04 18:21:39 +01001056 rmidi_dbg(substream->rmidi,
1057 "snd_rawmidi_transmit_empty: output is not active!!!\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001058 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}
Takashi Iwai6776a5d2014-02-27 16:00:17 +01001065EXPORT_SYMBOL(snd_rawmidi_transmit_empty);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001066
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 *
Yacine Belkadieb7c06e2013-03-11 22:05:14 +01001079 * Return: The size of copied data, or a negative error code on failure.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001080 */
Takashi Iwai48c9d412005-11-17 13:56:51 +01001081int snd_rawmidi_transmit_peek(struct snd_rawmidi_substream *substream,
1082 unsigned char *buffer, int count)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001083{
1084 unsigned long flags;
1085 int result, count1;
Takashi Iwai48c9d412005-11-17 13:56:51 +01001086 struct snd_rawmidi_runtime *runtime = substream->runtime;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001087
1088 if (runtime->buffer == NULL) {
Takashi Iwaica20d292014-02-04 18:21:39 +01001089 rmidi_dbg(substream->rmidi,
1090 "snd_rawmidi_transmit_peek: output is not active!!!\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001091 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}
Takashi Iwai6776a5d2014-02-27 16:00:17 +01001122EXPORT_SYMBOL(snd_rawmidi_transmit_peek);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001123
1124/**
1125 * snd_rawmidi_transmit_ack - acknowledge the transmission
1126 * @substream: the rawmidi substream
Masanari Iida0a114582014-02-09 00:47:36 +09001127 * @count: the transferred count
Linus Torvalds1da177e2005-04-16 15:20:36 -07001128 *
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 *
Yacine Belkadieb7c06e2013-03-11 22:05:14 +01001133 * Return: The advanced size if successful, or a negative error code on failure.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001134 */
Takashi Iwai48c9d412005-11-17 13:56:51 +01001135int snd_rawmidi_transmit_ack(struct snd_rawmidi_substream *substream, int count)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001136{
1137 unsigned long flags;
Takashi Iwai48c9d412005-11-17 13:56:51 +01001138 struct snd_rawmidi_runtime *runtime = substream->runtime;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001139
1140 if (runtime->buffer == NULL) {
Takashi Iwaica20d292014-02-04 18:21:39 +01001141 rmidi_dbg(substream->rmidi,
1142 "snd_rawmidi_transmit_ack: output is not active!!!\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001143 return -EINVAL;
1144 }
1145 spin_lock_irqsave(&runtime->lock, flags);
Takashi Iwai7eaa9432008-08-08 17:09:09 +02001146 snd_BUG_ON(runtime->avail + count > runtime->buffer_size);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001147 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}
Takashi Iwai6776a5d2014-02-27 16:00:17 +01001158EXPORT_SYMBOL(snd_rawmidi_transmit_ack);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001159
1160/**
1161 * snd_rawmidi_transmit - copy from the buffer to the device
1162 * @substream: the rawmidi substream
Takashi Iwaidf8db932005-09-07 13:38:19 +02001163 * @buffer: the buffer pointer
Linus Torvalds1da177e2005-04-16 15:20:36 -07001164 * @count: the data size to transfer
1165 *
1166 * Copies data from the buffer to the device and advances the pointer.
1167 *
Yacine Belkadieb7c06e2013-03-11 22:05:14 +01001168 * Return: The copied size if successful, or a negative error code on failure.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001169 */
Takashi Iwai48c9d412005-11-17 13:56:51 +01001170int snd_rawmidi_transmit(struct snd_rawmidi_substream *substream,
1171 unsigned char *buffer, int count)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001172{
Takashi Iwai219df322008-11-03 08:17:05 +01001173 if (!substream->opened)
1174 return -EBADFD;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001175 count = snd_rawmidi_transmit_peek(substream, buffer, count);
1176 if (count < 0)
1177 return count;
1178 return snd_rawmidi_transmit_ack(substream, count);
1179}
Takashi Iwai6776a5d2014-02-27 16:00:17 +01001180EXPORT_SYMBOL(snd_rawmidi_transmit);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001181
Takashi Iwai48c9d412005-11-17 13:56:51 +01001182static long snd_rawmidi_kernel_write1(struct snd_rawmidi_substream *substream,
Marcin Åšlusarz17596a82008-01-09 17:56:07 +01001183 const unsigned char __user *userbuf,
1184 const unsigned char *kernelbuf,
1185 long count)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001186{
1187 unsigned long flags;
1188 long count1, result;
Takashi Iwai48c9d412005-11-17 13:56:51 +01001189 struct snd_rawmidi_runtime *runtime = substream->runtime;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001190
Takashi Iwai7eaa9432008-08-08 17:09:09 +02001191 if (snd_BUG_ON(!kernelbuf && !userbuf))
1192 return -EINVAL;
1193 if (snd_BUG_ON(!runtime->buffer))
1194 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001195
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;
Marcin Åšlusarz17596a82008-01-09 17:56:07 +01001210 if (kernelbuf)
1211 memcpy(runtime->buffer + runtime->appl_ptr,
1212 kernelbuf + result, count1);
1213 else if (userbuf) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001214 spin_unlock_irqrestore(&runtime->lock, flags);
1215 if (copy_from_user(runtime->buffer + runtime->appl_ptr,
Marcin Åšlusarz17596a82008-01-09 17:56:07 +01001216 userbuf + result, count1)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001217 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;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001227 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
Takashi Iwai48c9d412005-11-17 13:56:51 +01001237long snd_rawmidi_kernel_write(struct snd_rawmidi_substream *substream,
1238 const unsigned char *buf, long count)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001239{
Marcin Åšlusarz17596a82008-01-09 17:56:07 +01001240 return snd_rawmidi_kernel_write1(substream, NULL, buf, count);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001241}
Takashi Iwai6776a5d2014-02-27 16:00:17 +01001242EXPORT_SYMBOL(snd_rawmidi_kernel_write);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001243
Takashi Iwai48c9d412005-11-17 13:56:51 +01001244static ssize_t snd_rawmidi_write(struct file *file, const char __user *buf,
1245 size_t count, loff_t *offset)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001246{
1247 long result, timeout;
1248 int count1;
Takashi Iwai48c9d412005-11-17 13:56:51 +01001249 struct snd_rawmidi_file *rfile;
1250 struct snd_rawmidi_runtime *runtime;
1251 struct snd_rawmidi_substream *substream;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001252
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);
Takashi Iwai0914f792012-10-16 16:43:39 +02001274 if (rfile->rmidi->card->shutdown)
1275 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001276 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);
Marcin Åšlusarz17596a82008-01-09 17:56:07 +01001283 count1 = snd_rawmidi_kernel_write1(substream, buf, NULL, count);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001284 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 }
Christoph Hellwig6b2f3d12009-10-27 11:05:28 +01001292 if (file->f_flags & O_DSYNC) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001293 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
1314static unsigned int snd_rawmidi_poll(struct file *file, poll_table * wait)
1315{
Takashi Iwai48c9d412005-11-17 13:56:51 +01001316 struct snd_rawmidi_file *rfile;
1317 struct snd_rawmidi_runtime *runtime;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001318 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
Takashi Iwai48c9d412005-11-17 13:56:51 +01001354static void snd_rawmidi_proc_info_read(struct snd_info_entry *entry,
1355 struct snd_info_buffer *buffer)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001356{
Takashi Iwai48c9d412005-11-17 13:56:51 +01001357 struct snd_rawmidi *rmidi;
1358 struct snd_rawmidi_substream *substream;
1359 struct snd_rawmidi_runtime *runtime;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001360
1361 rmidi = entry->private_data;
1362 snd_iprintf(buffer, "%s\n\n", rmidi->name);
Ingo Molnar1a60d4c2006-01-16 16:29:08 +01001363 mutex_lock(&rmidi->open_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001364 if (rmidi->info_flags & SNDRV_RAWMIDI_INFO_OUTPUT) {
Johannes Berg9244b2c2006-10-05 16:02:22 +02001365 list_for_each_entry(substream,
1366 &rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substreams,
1367 list) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001368 snd_iprintf(buffer,
1369 "Output %d\n"
1370 " Tx bytes : %lu\n",
1371 substream->number,
1372 (unsigned long) substream->bytes);
1373 if (substream->opened) {
Clemens Ladisch7584af12009-11-10 10:14:04 +01001374 snd_iprintf(buffer,
1375 " Owner PID : %d\n",
1376 pid_vnr(substream->pid));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001377 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) {
Johannes Berg9244b2c2006-10-05 16:02:22 +02001389 list_for_each_entry(substream,
1390 &rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substreams,
1391 list) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001392 snd_iprintf(buffer,
1393 "Input %d\n"
1394 " Rx bytes : %lu\n",
1395 substream->number,
1396 (unsigned long) substream->bytes);
1397 if (substream->opened) {
Clemens Ladisch7584af12009-11-10 10:14:04 +01001398 snd_iprintf(buffer,
1399 " Owner PID : %d\n",
1400 pid_vnr(substream->pid));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001401 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 }
Ingo Molnar1a60d4c2006-01-16 16:29:08 +01001412 mutex_unlock(&rmidi->open_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001413}
1414
1415/*
1416 * Register functions
1417 */
1418
Arjan van de Ven9c2e08c2007-02-12 00:55:37 -08001419static const struct file_operations snd_rawmidi_f_ops =
Linus Torvalds1da177e2005-04-16 15:20:36 -07001420{
1421 .owner = THIS_MODULE,
1422 .read = snd_rawmidi_read,
1423 .write = snd_rawmidi_write,
1424 .open = snd_rawmidi_open,
1425 .release = snd_rawmidi_release,
Takashi Iwai02f48652010-04-13 11:49:04 +02001426 .llseek = no_llseek,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001427 .poll = snd_rawmidi_poll,
1428 .unlocked_ioctl = snd_rawmidi_ioctl,
1429 .compat_ioctl = snd_rawmidi_ioctl_compat,
1430};
1431
Takashi Iwai48c9d412005-11-17 13:56:51 +01001432static int snd_rawmidi_alloc_substreams(struct snd_rawmidi *rmidi,
1433 struct snd_rawmidi_str *stream,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001434 int direction,
1435 int count)
1436{
Takashi Iwai48c9d412005-11-17 13:56:51 +01001437 struct snd_rawmidi_substream *substream;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001438 int idx;
1439
Linus Torvalds1da177e2005-04-16 15:20:36 -07001440 for (idx = 0; idx < count; idx++) {
Takashi Iwaica2c0962005-09-09 14:20:23 +02001441 substream = kzalloc(sizeof(*substream), GFP_KERNEL);
Takashi Iwai73e77ba2005-11-17 17:44:01 +01001442 if (substream == NULL) {
Takashi Iwaica20d292014-02-04 18:21:39 +01001443 rmidi_err(rmidi, "rawmidi: cannot allocate substream\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001444 return -ENOMEM;
Takashi Iwai73e77ba2005-11-17 17:44:01 +01001445 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001446 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 *
Yacine Belkadieb7c06e2013-03-11 22:05:14 +01001468 * Return: Zero if successful, or a negative error code on failure.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001469 */
Takashi Iwai48c9d412005-11-17 13:56:51 +01001470int snd_rawmidi_new(struct snd_card *card, char *id, int device,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001471 int output_count, int input_count,
Takashi Iwai48c9d412005-11-17 13:56:51 +01001472 struct snd_rawmidi ** rrawmidi)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001473{
Takashi Iwai48c9d412005-11-17 13:56:51 +01001474 struct snd_rawmidi *rmidi;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001475 int err;
Takashi Iwai48c9d412005-11-17 13:56:51 +01001476 static struct snd_device_ops ops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001477 .dev_free = snd_rawmidi_dev_free,
1478 .dev_register = snd_rawmidi_dev_register,
1479 .dev_disconnect = snd_rawmidi_dev_disconnect,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001480 };
1481
Takashi Iwai7eaa9432008-08-08 17:09:09 +02001482 if (snd_BUG_ON(!card))
1483 return -ENXIO;
1484 if (rrawmidi)
1485 *rrawmidi = NULL;
Takashi Iwaica2c0962005-09-09 14:20:23 +02001486 rmidi = kzalloc(sizeof(*rmidi), GFP_KERNEL);
Takashi Iwai73e77ba2005-11-17 17:44:01 +01001487 if (rmidi == NULL) {
Takashi Iwaica20d292014-02-04 18:21:39 +01001488 dev_err(card->dev, "rawmidi: cannot allocate\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001489 return -ENOMEM;
Takashi Iwai73e77ba2005-11-17 17:44:01 +01001490 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001491 rmidi->card = card;
1492 rmidi->device = device;
Ingo Molnar1a60d4c2006-01-16 16:29:08 +01001493 mutex_init(&rmidi->open_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001494 init_waitqueue_head(&rmidi->open_wait);
Akinobu Mitac13893d2006-11-23 12:02:33 +01001495 INIT_LIST_HEAD(&rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substreams);
1496 INIT_LIST_HEAD(&rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substreams);
1497
Linus Torvalds1da177e2005-04-16 15:20:36 -07001498 if (id != NULL)
1499 strlcpy(rmidi->id, id, sizeof(rmidi->id));
Takashi Iwai73e77ba2005-11-17 17:44:01 +01001500 if ((err = snd_rawmidi_alloc_substreams(rmidi,
1501 &rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT],
1502 SNDRV_RAWMIDI_STREAM_INPUT,
1503 input_count)) < 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001504 snd_rawmidi_free(rmidi);
1505 return err;
1506 }
Takashi Iwai73e77ba2005-11-17 17:44:01 +01001507 if ((err = snd_rawmidi_alloc_substreams(rmidi,
1508 &rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT],
1509 SNDRV_RAWMIDI_STREAM_OUTPUT,
1510 output_count)) < 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001511 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 }
Takashi Iwai7eaa9432008-08-08 17:09:09 +02001518 if (rrawmidi)
1519 *rrawmidi = rmidi;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001520 return 0;
1521}
Takashi Iwai6776a5d2014-02-27 16:00:17 +01001522EXPORT_SYMBOL(snd_rawmidi_new);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001523
Takashi Iwai48c9d412005-11-17 13:56:51 +01001524static void snd_rawmidi_free_substreams(struct snd_rawmidi_str *stream)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001525{
Takashi Iwai48c9d412005-11-17 13:56:51 +01001526 struct snd_rawmidi_substream *substream;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001527
1528 while (!list_empty(&stream->substreams)) {
Takashi Iwai48c9d412005-11-17 13:56:51 +01001529 substream = list_entry(stream->substreams.next, struct snd_rawmidi_substream, list);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001530 list_del(&substream->list);
1531 kfree(substream);
1532 }
1533}
1534
Takashi Iwai48c9d412005-11-17 13:56:51 +01001535static int snd_rawmidi_free(struct snd_rawmidi *rmidi)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001536{
Takashi Iwai7eaa9432008-08-08 17:09:09 +02001537 if (!rmidi)
1538 return 0;
Takashi Iwaic4614822006-06-23 14:38:23 +02001539
1540 snd_info_free_entry(rmidi->proc_entry);
1541 rmidi->proc_entry = NULL;
1542 mutex_lock(&register_mutex);
1543 if (rmidi->ops && rmidi->ops->dev_unregister)
1544 rmidi->ops->dev_unregister(rmidi);
1545 mutex_unlock(&register_mutex);
1546
Linus Torvalds1da177e2005-04-16 15:20:36 -07001547 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
Takashi Iwai48c9d412005-11-17 13:56:51 +01001555static int snd_rawmidi_dev_free(struct snd_device *device)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001556{
Takashi Iwai48c9d412005-11-17 13:56:51 +01001557 struct snd_rawmidi *rmidi = device->device_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001558 return snd_rawmidi_free(rmidi);
1559}
1560
1561#if defined(CONFIG_SND_SEQUENCER) || (defined(MODULE) && defined(CONFIG_SND_SEQUENCER_MODULE))
Takashi Iwai48c9d412005-11-17 13:56:51 +01001562static void snd_rawmidi_dev_seq_free(struct snd_seq_device *device)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001563{
Takashi Iwai48c9d412005-11-17 13:56:51 +01001564 struct snd_rawmidi *rmidi = device->private_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001565 rmidi->seq_dev = NULL;
1566}
1567#endif
1568
Takashi Iwai48c9d412005-11-17 13:56:51 +01001569static int snd_rawmidi_dev_register(struct snd_device *device)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001570{
Clemens Ladischf87135f2005-11-20 14:06:59 +01001571 int err;
Takashi Iwai48c9d412005-11-17 13:56:51 +01001572 struct snd_info_entry *entry;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001573 char name[16];
Takashi Iwai48c9d412005-11-17 13:56:51 +01001574 struct snd_rawmidi *rmidi = device->device_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001575
1576 if (rmidi->device >= SNDRV_RAWMIDI_DEVICES)
1577 return -ENOMEM;
Ingo Molnar1a60d4c2006-01-16 16:29:08 +01001578 mutex_lock(&register_mutex);
Clemens Ladischf87135f2005-11-20 14:06:59 +01001579 if (snd_rawmidi_search(rmidi->card, rmidi->device)) {
Ingo Molnar1a60d4c2006-01-16 16:29:08 +01001580 mutex_unlock(&register_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001581 return -EBUSY;
1582 }
Clemens Ladischf87135f2005-11-20 14:06:59 +01001583 list_add_tail(&rmidi->list, &snd_rawmidi_devices);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001584 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,
Clemens Ladischf87135f2005-11-20 14:06:59 +01001587 &snd_rawmidi_f_ops, rmidi, name)) < 0) {
Takashi Iwaica20d292014-02-04 18:21:39 +01001588 rmidi_err(rmidi, "unable to register rawmidi device %i:%i\n",
1589 rmidi->card->number, rmidi->device);
Clemens Ladischf87135f2005-11-20 14:06:59 +01001590 list_del(&rmidi->list);
Ingo Molnar1a60d4c2006-01-16 16:29:08 +01001591 mutex_unlock(&register_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001592 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);
Clemens Ladischf87135f2005-11-20 14:06:59 +01001597 list_del(&rmidi->list);
Ingo Molnar1a60d4c2006-01-16 16:29:08 +01001598 mutex_unlock(&register_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001599 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,
Clemens Ladischf87135f2005-11-20 14:06:59 +01001605 rmidi->card, 0, &snd_rawmidi_f_ops,
Takashi Iwai80d7d772014-02-04 13:51:45 +01001606 rmidi) < 0) {
Takashi Iwaica20d292014-02-04 18:21:39 +01001607 rmidi_err(rmidi,
1608 "unable to register OSS rawmidi device %i:%i\n",
1609 rmidi->card->number, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001610 } 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,
Clemens Ladischf87135f2005-11-20 14:06:59 +01001619 rmidi->card, 1, &snd_rawmidi_f_ops,
Takashi Iwai80d7d772014-02-04 13:51:45 +01001620 rmidi) < 0) {
Takashi Iwaica20d292014-02-04 18:21:39 +01001621 rmidi_err(rmidi,
1622 "unable to register OSS rawmidi device %i:%i\n",
1623 rmidi->card->number, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001624 } else {
1625 rmidi->ossreg++;
1626 }
1627 }
1628#endif /* CONFIG_SND_OSSEMUL */
Ingo Molnar1a60d4c2006-01-16 16:29:08 +01001629 mutex_unlock(&register_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001630 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;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001634 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
Takashi Iwai48c9d412005-11-17 13:56:51 +01001654static int snd_rawmidi_dev_disconnect(struct snd_device *device)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001655{
Takashi Iwai48c9d412005-11-17 13:56:51 +01001656 struct snd_rawmidi *rmidi = device->device_data;
Takashi Iwai0914f792012-10-16 16:43:39 +02001657 int dir;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001658
Ingo Molnar1a60d4c2006-01-16 16:29:08 +01001659 mutex_lock(&register_mutex);
Takashi Iwai0914f792012-10-16 16:43:39 +02001660 mutex_lock(&rmidi->open_mutex);
1661 wake_up(&rmidi->open_wait);
Clemens Ladischf87135f2005-11-20 14:06:59 +01001662 list_del_init(&rmidi->list);
Takashi Iwai0914f792012-10-16 16:43:39 +02001663 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
Linus Torvalds1da177e2005-04-16 15:20:36 -07001671#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 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001684 snd_unregister_device(SNDRV_DEVICE_TYPE_RAWMIDI, rmidi->card, rmidi->device);
Takashi Iwai0914f792012-10-16 16:43:39 +02001685 mutex_unlock(&rmidi->open_mutex);
Ingo Molnar1a60d4c2006-01-16 16:29:08 +01001686 mutex_unlock(&register_mutex);
Takashi Iwaic4614822006-06-23 14:38:23 +02001687 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001688}
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 */
Takashi Iwai48c9d412005-11-17 13:56:51 +01001698void snd_rawmidi_set_ops(struct snd_rawmidi *rmidi, int stream,
1699 struct snd_rawmidi_ops *ops)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001700{
Takashi Iwai48c9d412005-11-17 13:56:51 +01001701 struct snd_rawmidi_substream *substream;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001702
Johannes Berg9244b2c2006-10-05 16:02:22 +02001703 list_for_each_entry(substream, &rmidi->streams[stream].substreams, list)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001704 substream->ops = ops;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001705}
Takashi Iwai6776a5d2014-02-27 16:00:17 +01001706EXPORT_SYMBOL(snd_rawmidi_set_ops);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001707
1708/*
1709 * ENTRY functions
1710 */
1711
1712static 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) {
Takashi Iwaica20d292014-02-04 18:21:39 +01001722 pr_err("ALSA: rawmidi: invalid midi_map[%d] = %d\n",
1723 i, midi_map[i]);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001724 midi_map[i] = 0;
1725 }
1726 if (amidi_map[i] < 0 || amidi_map[i] >= SNDRV_RAWMIDI_DEVICES) {
Takashi Iwaica20d292014-02-04 18:21:39 +01001727 pr_err("ALSA: rawmidi: invalid amidi_map[%d] = %d\n",
1728 i, amidi_map[i]);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001729 amidi_map[i] = 1;
1730 }
1731 }
1732 }
1733#endif /* CONFIG_SND_OSSEMUL */
1734 return 0;
1735}
1736
1737static 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
1743module_init(alsa_rawmidi_init)
1744module_exit(alsa_rawmidi_exit)