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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...) \
Takashi Iwai07cc3e82015-01-30 15:31:52 +010060 dev_err(&(rmidi)->dev, fmt, ##args)
Takashi Iwaica20d292014-02-04 18:21:39 +010061#define rmidi_warn(rmidi, fmt, args...) \
Takashi Iwai07cc3e82015-01-30 15:31:52 +010062 dev_warn(&(rmidi)->dev, fmt, ##args)
Takashi Iwaica20d292014-02-04 18:21:39 +010063#define rmidi_dbg(rmidi, fmt, args...) \
Takashi Iwai07cc3e82015-01-30 15:31:52 +010064 dev_dbg(&(rmidi)->dev, fmt, ##args)
Takashi Iwaica20d292014-02-04 18:21:39 +010065
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;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700372
Takashi Iwai9a1b64ca2009-02-11 17:03:49 +0100373 if ((file->f_flags & O_APPEND) && !(file->f_flags & O_NONBLOCK))
374 return -EINVAL; /* invalid combination */
375
Takashi Iwai02f48652010-04-13 11:49:04 +0200376 err = nonseekable_open(inode, file);
377 if (err < 0)
378 return err;
379
Clemens Ladischf1902862005-10-24 17:05:03 +0200380 if (maj == snd_major) {
Clemens Ladischf87135f2005-11-20 14:06:59 +0100381 rmidi = snd_lookup_minor_data(iminor(inode),
382 SNDRV_DEVICE_TYPE_RAWMIDI);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700383#ifdef CONFIG_SND_OSSEMUL
Clemens Ladischf1902862005-10-24 17:05:03 +0200384 } else if (maj == SOUND_MAJOR) {
Clemens Ladischf87135f2005-11-20 14:06:59 +0100385 rmidi = snd_lookup_oss_minor_data(iminor(inode),
386 SNDRV_OSS_DEVICE_TYPE_MIDI);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700387#endif
Clemens Ladischf1902862005-10-24 17:05:03 +0200388 } else
Linus Torvalds1da177e2005-04-16 15:20:36 -0700389 return -ENXIO;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700390
Linus Torvalds1da177e2005-04-16 15:20:36 -0700391 if (rmidi == NULL)
392 return -ENODEV;
Takashi Iwai9a1b64ca2009-02-11 17:03:49 +0100393
Takashi Iwaia0830db2012-10-16 13:05:59 +0200394 if (!try_module_get(rmidi->card->module)) {
395 snd_card_unref(rmidi->card);
Takashi Iwai9a1b64ca2009-02-11 17:03:49 +0100396 return -ENXIO;
Takashi Iwaia0830db2012-10-16 13:05:59 +0200397 }
Takashi Iwai9a1b64ca2009-02-11 17:03:49 +0100398
399 mutex_lock(&rmidi->open_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700400 card = rmidi->card;
401 err = snd_card_file_add(card, file);
402 if (err < 0)
Takashi Iwai9a1b64ca2009-02-11 17:03:49 +0100403 goto __error_card;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700404 fflags = snd_rawmidi_file_flags(file);
Clemens Ladischf1902862005-10-24 17:05:03 +0200405 if ((file->f_flags & O_APPEND) || maj == SOUND_MAJOR) /* OSS emul? */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700406 fflags |= SNDRV_RAWMIDI_LFLG_APPEND;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700407 rawmidi_file = kmalloc(sizeof(*rawmidi_file), GFP_KERNEL);
408 if (rawmidi_file == NULL) {
Takashi Iwai9a1b64ca2009-02-11 17:03:49 +0100409 err = -ENOMEM;
410 goto __error;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700411 }
412 init_waitqueue_entry(&wait, current);
413 add_wait_queue(&rmidi->open_wait, &wait);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700414 while (1) {
Takashi Iwai23c18d42014-02-19 14:30:29 +0100415 subdevice = snd_ctl_get_preferred_subdevice(card, SND_CTL_SUBDEV_RAWMIDI);
Takashi Iwai9a1b64ca2009-02-11 17:03:49 +0100416 err = rawmidi_open_priv(rmidi, subdevice, fflags, rawmidi_file);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700417 if (err >= 0)
418 break;
419 if (err == -EAGAIN) {
420 if (file->f_flags & O_NONBLOCK) {
421 err = -EBUSY;
422 break;
423 }
424 } else
425 break;
426 set_current_state(TASK_INTERRUPTIBLE);
Ingo Molnar1a60d4c2006-01-16 16:29:08 +0100427 mutex_unlock(&rmidi->open_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700428 schedule();
Ingo Molnar1a60d4c2006-01-16 16:29:08 +0100429 mutex_lock(&rmidi->open_mutex);
Takashi Iwai0914f792012-10-16 16:43:39 +0200430 if (rmidi->card->shutdown) {
431 err = -ENODEV;
432 break;
433 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700434 if (signal_pending(current)) {
435 err = -ERESTARTSYS;
436 break;
437 }
438 }
Takashi Iwai9a1b64ca2009-02-11 17:03:49 +0100439 remove_wait_queue(&rmidi->open_wait, &wait);
440 if (err < 0) {
441 kfree(rawmidi_file);
442 goto __error;
443 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700444#ifdef CONFIG_SND_OSSEMUL
445 if (rawmidi_file->input && rawmidi_file->input->runtime)
446 rawmidi_file->input->runtime->oss = (maj == SOUND_MAJOR);
447 if (rawmidi_file->output && rawmidi_file->output->runtime)
448 rawmidi_file->output->runtime->oss = (maj == SOUND_MAJOR);
449#endif
Takashi Iwai9a1b64ca2009-02-11 17:03:49 +0100450 file->private_data = rawmidi_file;
Ingo Molnar1a60d4c2006-01-16 16:29:08 +0100451 mutex_unlock(&rmidi->open_mutex);
Takashi Iwaia0830db2012-10-16 13:05:59 +0200452 snd_card_unref(rmidi->card);
Takashi Iwai9a1b64ca2009-02-11 17:03:49 +0100453 return 0;
454
455 __error:
456 snd_card_file_remove(card, file);
457 __error_card:
458 mutex_unlock(&rmidi->open_mutex);
459 module_put(rmidi->card->module);
Takashi Iwaia0830db2012-10-16 13:05:59 +0200460 snd_card_unref(rmidi->card);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700461 return err;
462}
463
Takashi Iwai9a1b64ca2009-02-11 17:03:49 +0100464static void close_substream(struct snd_rawmidi *rmidi,
465 struct snd_rawmidi_substream *substream,
466 int cleanup)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700467{
Takashi Iwai9a1b64ca2009-02-11 17:03:49 +0100468 if (--substream->use_count)
469 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700470
Takashi Iwai9a1b64ca2009-02-11 17:03:49 +0100471 if (cleanup) {
472 if (substream->stream == SNDRV_RAWMIDI_STREAM_INPUT)
473 snd_rawmidi_input_trigger(substream, 0);
474 else {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700475 if (substream->active_sensing) {
476 unsigned char buf = 0xfe;
Takashi Iwai9a1b64ca2009-02-11 17:03:49 +0100477 /* sending single active sensing message
478 * to shut the device up
479 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700480 snd_rawmidi_kernel_write(substream, &buf, 1);
481 }
482 if (snd_rawmidi_drain_output(substream) == -ERESTARTSYS)
483 snd_rawmidi_output_trigger(substream, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700484 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700485 }
Takashi Iwai9a1b64ca2009-02-11 17:03:49 +0100486 substream->ops->close(substream);
487 if (substream->runtime->private_free)
488 substream->runtime->private_free(substream);
489 snd_rawmidi_runtime_free(substream);
490 substream->opened = 0;
491 substream->append = 0;
Clemens Ladisch7584af12009-11-10 10:14:04 +0100492 put_pid(substream->pid);
493 substream->pid = NULL;
Clemens Ladisch91d12c42009-10-21 09:12:26 +0200494 rmidi->streams[substream->stream].substream_opened--;
Takashi Iwai9a1b64ca2009-02-11 17:03:49 +0100495}
496
497static void rawmidi_release_priv(struct snd_rawmidi_file *rfile)
498{
499 struct snd_rawmidi *rmidi;
500
501 rmidi = rfile->rmidi;
502 mutex_lock(&rmidi->open_mutex);
503 if (rfile->input) {
504 close_substream(rmidi, rfile->input, 1);
505 rfile->input = NULL;
506 }
507 if (rfile->output) {
508 close_substream(rmidi, rfile->output, 1);
509 rfile->output = NULL;
510 }
511 rfile->rmidi = NULL;
Ingo Molnar1a60d4c2006-01-16 16:29:08 +0100512 mutex_unlock(&rmidi->open_mutex);
Takashi Iwai9a1b64ca2009-02-11 17:03:49 +0100513 wake_up(&rmidi->open_wait);
514}
515
516/* called from sound/core/seq/seq_midi.c */
517int snd_rawmidi_kernel_release(struct snd_rawmidi_file *rfile)
518{
519 struct snd_rawmidi *rmidi;
520
521 if (snd_BUG_ON(!rfile))
522 return -ENXIO;
523
524 rmidi = rfile->rmidi;
525 rawmidi_release_priv(rfile);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700526 module_put(rmidi->card->module);
527 return 0;
528}
Takashi Iwai6776a5d2014-02-27 16:00:17 +0100529EXPORT_SYMBOL(snd_rawmidi_kernel_release);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700530
531static int snd_rawmidi_release(struct inode *inode, struct file *file)
532{
Takashi Iwai48c9d412005-11-17 13:56:51 +0100533 struct snd_rawmidi_file *rfile;
534 struct snd_rawmidi *rmidi;
Clemens Ladischaa73aec2010-10-15 12:06:18 +0200535 struct module *module;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700536
537 rfile = file->private_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700538 rmidi = rfile->rmidi;
Takashi Iwai9a1b64ca2009-02-11 17:03:49 +0100539 rawmidi_release_priv(rfile);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700540 kfree(rfile);
Clemens Ladischaa73aec2010-10-15 12:06:18 +0200541 module = rmidi->card->module;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700542 snd_card_file_remove(rmidi->card, file);
Clemens Ladischaa73aec2010-10-15 12:06:18 +0200543 module_put(module);
Takashi Iwai9a1b64ca2009-02-11 17:03:49 +0100544 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700545}
546
Adrian Bunk18612042005-11-23 13:14:50 +0100547static int snd_rawmidi_info(struct snd_rawmidi_substream *substream,
548 struct snd_rawmidi_info *info)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700549{
Takashi Iwai48c9d412005-11-17 13:56:51 +0100550 struct snd_rawmidi *rmidi;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700551
552 if (substream == NULL)
553 return -ENODEV;
554 rmidi = substream->rmidi;
555 memset(info, 0, sizeof(*info));
556 info->card = rmidi->card->number;
557 info->device = rmidi->device;
558 info->subdevice = substream->number;
559 info->stream = substream->stream;
560 info->flags = rmidi->info_flags;
561 strcpy(info->id, rmidi->id);
562 strcpy(info->name, rmidi->name);
563 strcpy(info->subname, substream->name);
564 info->subdevices_count = substream->pstr->substream_count;
565 info->subdevices_avail = (substream->pstr->substream_count -
566 substream->pstr->substream_opened);
567 return 0;
568}
569
Takashi Iwai48c9d412005-11-17 13:56:51 +0100570static int snd_rawmidi_info_user(struct snd_rawmidi_substream *substream,
571 struct snd_rawmidi_info __user * _info)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700572{
Takashi Iwai48c9d412005-11-17 13:56:51 +0100573 struct snd_rawmidi_info info;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700574 int err;
575 if ((err = snd_rawmidi_info(substream, &info)) < 0)
576 return err;
Takashi Iwai48c9d412005-11-17 13:56:51 +0100577 if (copy_to_user(_info, &info, sizeof(struct snd_rawmidi_info)))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700578 return -EFAULT;
579 return 0;
580}
581
Takashi Iwai48c9d412005-11-17 13:56:51 +0100582int snd_rawmidi_info_select(struct snd_card *card, struct snd_rawmidi_info *info)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700583{
Takashi Iwai48c9d412005-11-17 13:56:51 +0100584 struct snd_rawmidi *rmidi;
585 struct snd_rawmidi_str *pstr;
586 struct snd_rawmidi_substream *substream;
Clemens Ladischf87135f2005-11-20 14:06:59 +0100587
Ingo Molnar1a60d4c2006-01-16 16:29:08 +0100588 mutex_lock(&register_mutex);
Clemens Ladischf87135f2005-11-20 14:06:59 +0100589 rmidi = snd_rawmidi_search(card, info->device);
Ingo Molnar1a60d4c2006-01-16 16:29:08 +0100590 mutex_unlock(&register_mutex);
Clemens Ladischa106cd32005-11-20 13:59:56 +0100591 if (!rmidi)
592 return -ENXIO;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700593 if (info->stream < 0 || info->stream > 1)
594 return -EINVAL;
595 pstr = &rmidi->streams[info->stream];
596 if (pstr->substream_count == 0)
597 return -ENOENT;
598 if (info->subdevice >= pstr->substream_count)
599 return -ENXIO;
Johannes Berg9244b2c2006-10-05 16:02:22 +0200600 list_for_each_entry(substream, &pstr->substreams, list) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700601 if ((unsigned int)substream->number == info->subdevice)
602 return snd_rawmidi_info(substream, info);
603 }
604 return -ENXIO;
605}
Takashi Iwai6776a5d2014-02-27 16:00:17 +0100606EXPORT_SYMBOL(snd_rawmidi_info_select);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700607
Takashi Iwai48c9d412005-11-17 13:56:51 +0100608static int snd_rawmidi_info_select_user(struct snd_card *card,
609 struct snd_rawmidi_info __user *_info)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700610{
611 int err;
Takashi Iwai48c9d412005-11-17 13:56:51 +0100612 struct snd_rawmidi_info info;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700613 if (get_user(info.device, &_info->device))
614 return -EFAULT;
615 if (get_user(info.stream, &_info->stream))
616 return -EFAULT;
617 if (get_user(info.subdevice, &_info->subdevice))
618 return -EFAULT;
619 if ((err = snd_rawmidi_info_select(card, &info)) < 0)
620 return err;
Takashi Iwai48c9d412005-11-17 13:56:51 +0100621 if (copy_to_user(_info, &info, sizeof(struct snd_rawmidi_info)))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700622 return -EFAULT;
623 return 0;
624}
625
Takashi Iwai48c9d412005-11-17 13:56:51 +0100626int snd_rawmidi_output_params(struct snd_rawmidi_substream *substream,
627 struct snd_rawmidi_params * params)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700628{
629 char *newbuf;
Takashi Iwai48c9d412005-11-17 13:56:51 +0100630 struct snd_rawmidi_runtime *runtime = substream->runtime;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700631
632 if (substream->append && substream->use_count > 1)
633 return -EBUSY;
634 snd_rawmidi_drain_output(substream);
635 if (params->buffer_size < 32 || params->buffer_size > 1024L * 1024L) {
636 return -EINVAL;
637 }
638 if (params->avail_min < 1 || params->avail_min > params->buffer_size) {
639 return -EINVAL;
640 }
641 if (params->buffer_size != runtime->buffer_size) {
Takashi Iwai3101ba02011-07-12 08:05:16 +0200642 newbuf = krealloc(runtime->buffer, params->buffer_size,
643 GFP_KERNEL);
Jesper Juhl4fa95ef2006-03-28 01:56:54 -0800644 if (!newbuf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700645 return -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700646 runtime->buffer = newbuf;
647 runtime->buffer_size = params->buffer_size;
Clemens Ladisch1b98ea42005-11-21 07:31:31 +0100648 runtime->avail = runtime->buffer_size;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700649 }
650 runtime->avail_min = params->avail_min;
651 substream->active_sensing = !params->no_active_sensing;
652 return 0;
653}
Takashi Iwai6776a5d2014-02-27 16:00:17 +0100654EXPORT_SYMBOL(snd_rawmidi_output_params);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700655
Takashi Iwai48c9d412005-11-17 13:56:51 +0100656int snd_rawmidi_input_params(struct snd_rawmidi_substream *substream,
657 struct snd_rawmidi_params * params)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700658{
659 char *newbuf;
Takashi Iwai48c9d412005-11-17 13:56:51 +0100660 struct snd_rawmidi_runtime *runtime = substream->runtime;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700661
662 snd_rawmidi_drain_input(substream);
663 if (params->buffer_size < 32 || params->buffer_size > 1024L * 1024L) {
664 return -EINVAL;
665 }
666 if (params->avail_min < 1 || params->avail_min > params->buffer_size) {
667 return -EINVAL;
668 }
669 if (params->buffer_size != runtime->buffer_size) {
Takashi Iwai3101ba02011-07-12 08:05:16 +0200670 newbuf = krealloc(runtime->buffer, params->buffer_size,
671 GFP_KERNEL);
Jesper Juhl4fa95ef2006-03-28 01:56:54 -0800672 if (!newbuf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700673 return -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700674 runtime->buffer = newbuf;
675 runtime->buffer_size = params->buffer_size;
676 }
677 runtime->avail_min = params->avail_min;
678 return 0;
679}
Takashi Iwai6776a5d2014-02-27 16:00:17 +0100680EXPORT_SYMBOL(snd_rawmidi_input_params);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700681
Takashi Iwai48c9d412005-11-17 13:56:51 +0100682static int snd_rawmidi_output_status(struct snd_rawmidi_substream *substream,
683 struct snd_rawmidi_status * status)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700684{
Takashi Iwai48c9d412005-11-17 13:56:51 +0100685 struct snd_rawmidi_runtime *runtime = substream->runtime;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700686
687 memset(status, 0, sizeof(*status));
688 status->stream = SNDRV_RAWMIDI_STREAM_OUTPUT;
689 spin_lock_irq(&runtime->lock);
690 status->avail = runtime->avail;
691 spin_unlock_irq(&runtime->lock);
692 return 0;
693}
694
Takashi Iwai48c9d412005-11-17 13:56:51 +0100695static int snd_rawmidi_input_status(struct snd_rawmidi_substream *substream,
696 struct snd_rawmidi_status * status)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700697{
Takashi Iwai48c9d412005-11-17 13:56:51 +0100698 struct snd_rawmidi_runtime *runtime = substream->runtime;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700699
700 memset(status, 0, sizeof(*status));
701 status->stream = SNDRV_RAWMIDI_STREAM_INPUT;
702 spin_lock_irq(&runtime->lock);
703 status->avail = runtime->avail;
704 status->xruns = runtime->xruns;
705 runtime->xruns = 0;
706 spin_unlock_irq(&runtime->lock);
707 return 0;
708}
709
710static long snd_rawmidi_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
711{
Takashi Iwai48c9d412005-11-17 13:56:51 +0100712 struct snd_rawmidi_file *rfile;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700713 void __user *argp = (void __user *)arg;
714
715 rfile = file->private_data;
716 if (((cmd >> 8) & 0xff) != 'W')
717 return -ENOTTY;
718 switch (cmd) {
719 case SNDRV_RAWMIDI_IOCTL_PVERSION:
720 return put_user(SNDRV_RAWMIDI_VERSION, (int __user *)argp) ? -EFAULT : 0;
721 case SNDRV_RAWMIDI_IOCTL_INFO:
722 {
Takashi Iwai48c9d412005-11-17 13:56:51 +0100723 int stream;
724 struct snd_rawmidi_info __user *info = argp;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700725 if (get_user(stream, &info->stream))
726 return -EFAULT;
727 switch (stream) {
728 case SNDRV_RAWMIDI_STREAM_INPUT:
729 return snd_rawmidi_info_user(rfile->input, info);
730 case SNDRV_RAWMIDI_STREAM_OUTPUT:
731 return snd_rawmidi_info_user(rfile->output, info);
732 default:
733 return -EINVAL;
734 }
735 }
736 case SNDRV_RAWMIDI_IOCTL_PARAMS:
737 {
Takashi Iwai48c9d412005-11-17 13:56:51 +0100738 struct snd_rawmidi_params params;
739 if (copy_from_user(&params, argp, sizeof(struct snd_rawmidi_params)))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700740 return -EFAULT;
741 switch (params.stream) {
742 case SNDRV_RAWMIDI_STREAM_OUTPUT:
743 if (rfile->output == NULL)
744 return -EINVAL;
745 return snd_rawmidi_output_params(rfile->output, &params);
746 case SNDRV_RAWMIDI_STREAM_INPUT:
747 if (rfile->input == NULL)
748 return -EINVAL;
749 return snd_rawmidi_input_params(rfile->input, &params);
750 default:
751 return -EINVAL;
752 }
753 }
754 case SNDRV_RAWMIDI_IOCTL_STATUS:
755 {
756 int err = 0;
Takashi Iwai48c9d412005-11-17 13:56:51 +0100757 struct snd_rawmidi_status status;
758 if (copy_from_user(&status, argp, sizeof(struct snd_rawmidi_status)))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700759 return -EFAULT;
760 switch (status.stream) {
761 case SNDRV_RAWMIDI_STREAM_OUTPUT:
762 if (rfile->output == NULL)
763 return -EINVAL;
764 err = snd_rawmidi_output_status(rfile->output, &status);
765 break;
766 case SNDRV_RAWMIDI_STREAM_INPUT:
767 if (rfile->input == NULL)
768 return -EINVAL;
769 err = snd_rawmidi_input_status(rfile->input, &status);
770 break;
771 default:
772 return -EINVAL;
773 }
774 if (err < 0)
775 return err;
Takashi Iwai48c9d412005-11-17 13:56:51 +0100776 if (copy_to_user(argp, &status, sizeof(struct snd_rawmidi_status)))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700777 return -EFAULT;
778 return 0;
779 }
780 case SNDRV_RAWMIDI_IOCTL_DROP:
781 {
782 int val;
783 if (get_user(val, (int __user *) argp))
784 return -EFAULT;
785 switch (val) {
786 case SNDRV_RAWMIDI_STREAM_OUTPUT:
787 if (rfile->output == NULL)
788 return -EINVAL;
789 return snd_rawmidi_drop_output(rfile->output);
790 default:
791 return -EINVAL;
792 }
793 }
794 case SNDRV_RAWMIDI_IOCTL_DRAIN:
795 {
796 int val;
797 if (get_user(val, (int __user *) argp))
798 return -EFAULT;
799 switch (val) {
800 case SNDRV_RAWMIDI_STREAM_OUTPUT:
801 if (rfile->output == NULL)
802 return -EINVAL;
803 return snd_rawmidi_drain_output(rfile->output);
804 case SNDRV_RAWMIDI_STREAM_INPUT:
805 if (rfile->input == NULL)
806 return -EINVAL;
807 return snd_rawmidi_drain_input(rfile->input);
808 default:
809 return -EINVAL;
810 }
811 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700812 default:
Takashi Iwaica20d292014-02-04 18:21:39 +0100813 rmidi_dbg(rfile->rmidi,
814 "rawmidi: unknown command = 0x%x\n", cmd);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700815 }
816 return -ENOTTY;
817}
818
Takashi Iwai48c9d412005-11-17 13:56:51 +0100819static int snd_rawmidi_control_ioctl(struct snd_card *card,
820 struct snd_ctl_file *control,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700821 unsigned int cmd,
822 unsigned long arg)
823{
824 void __user *argp = (void __user *)arg;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700825
Linus Torvalds1da177e2005-04-16 15:20:36 -0700826 switch (cmd) {
827 case SNDRV_CTL_IOCTL_RAWMIDI_NEXT_DEVICE:
828 {
829 int device;
830
831 if (get_user(device, (int __user *)argp))
832 return -EFAULT;
Dan Carpentera7a13d02010-09-09 00:11:41 +0200833 if (device >= SNDRV_RAWMIDI_DEVICES) /* next device is -1 */
834 device = SNDRV_RAWMIDI_DEVICES - 1;
Ingo Molnar1a60d4c2006-01-16 16:29:08 +0100835 mutex_lock(&register_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700836 device = device < 0 ? 0 : device + 1;
837 while (device < SNDRV_RAWMIDI_DEVICES) {
Clemens Ladischf87135f2005-11-20 14:06:59 +0100838 if (snd_rawmidi_search(card, device))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700839 break;
840 device++;
841 }
842 if (device == SNDRV_RAWMIDI_DEVICES)
843 device = -1;
Ingo Molnar1a60d4c2006-01-16 16:29:08 +0100844 mutex_unlock(&register_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700845 if (put_user(device, (int __user *)argp))
846 return -EFAULT;
847 return 0;
848 }
849 case SNDRV_CTL_IOCTL_RAWMIDI_PREFER_SUBDEVICE:
850 {
851 int val;
852
853 if (get_user(val, (int __user *)argp))
854 return -EFAULT;
Takashi Iwai23c18d42014-02-19 14:30:29 +0100855 control->preferred_subdevice[SND_CTL_SUBDEV_RAWMIDI] = val;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700856 return 0;
857 }
858 case SNDRV_CTL_IOCTL_RAWMIDI_INFO:
859 return snd_rawmidi_info_select_user(card, argp);
860 }
861 return -ENOIOCTLCMD;
862}
863
864/**
865 * snd_rawmidi_receive - receive the input data from the device
866 * @substream: the rawmidi substream
867 * @buffer: the buffer pointer
868 * @count: the data size to read
869 *
870 * Reads the data from the internal buffer.
871 *
Yacine Belkadieb7c06e2013-03-11 22:05:14 +0100872 * Return: The size of read data, or a negative error code on failure.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700873 */
Takashi Iwai48c9d412005-11-17 13:56:51 +0100874int snd_rawmidi_receive(struct snd_rawmidi_substream *substream,
875 const unsigned char *buffer, int count)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700876{
877 unsigned long flags;
878 int result = 0, count1;
Takashi Iwai48c9d412005-11-17 13:56:51 +0100879 struct snd_rawmidi_runtime *runtime = substream->runtime;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700880
Takashi Iwai219df322008-11-03 08:17:05 +0100881 if (!substream->opened)
882 return -EBADFD;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700883 if (runtime->buffer == NULL) {
Takashi Iwaica20d292014-02-04 18:21:39 +0100884 rmidi_dbg(substream->rmidi,
885 "snd_rawmidi_receive: input is not active!!!\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700886 return -EINVAL;
887 }
888 spin_lock_irqsave(&runtime->lock, flags);
889 if (count == 1) { /* special case, faster code */
890 substream->bytes++;
891 if (runtime->avail < runtime->buffer_size) {
892 runtime->buffer[runtime->hw_ptr++] = buffer[0];
893 runtime->hw_ptr %= runtime->buffer_size;
894 runtime->avail++;
895 result++;
896 } else {
897 runtime->xruns++;
898 }
899 } else {
900 substream->bytes += count;
901 count1 = runtime->buffer_size - runtime->hw_ptr;
902 if (count1 > count)
903 count1 = count;
904 if (count1 > (int)(runtime->buffer_size - runtime->avail))
905 count1 = runtime->buffer_size - runtime->avail;
906 memcpy(runtime->buffer + runtime->hw_ptr, buffer, count1);
907 runtime->hw_ptr += count1;
908 runtime->hw_ptr %= runtime->buffer_size;
909 runtime->avail += count1;
910 count -= count1;
911 result += count1;
912 if (count > 0) {
913 buffer += count1;
914 count1 = count;
915 if (count1 > (int)(runtime->buffer_size - runtime->avail)) {
916 count1 = runtime->buffer_size - runtime->avail;
917 runtime->xruns += count - count1;
918 }
919 if (count1 > 0) {
920 memcpy(runtime->buffer, buffer, count1);
921 runtime->hw_ptr = count1;
922 runtime->avail += count1;
923 result += count1;
924 }
925 }
926 }
927 if (result > 0) {
928 if (runtime->event)
Takashi Iwaib3c705a2011-06-14 14:37:06 +0200929 schedule_work(&runtime->event_work);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700930 else if (snd_rawmidi_ready(substream))
931 wake_up(&runtime->sleep);
932 }
933 spin_unlock_irqrestore(&runtime->lock, flags);
934 return result;
935}
Takashi Iwai6776a5d2014-02-27 16:00:17 +0100936EXPORT_SYMBOL(snd_rawmidi_receive);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700937
Takashi Iwai48c9d412005-11-17 13:56:51 +0100938static long snd_rawmidi_kernel_read1(struct snd_rawmidi_substream *substream,
Marcin Åšlusarz17596a82008-01-09 17:56:07 +0100939 unsigned char __user *userbuf,
940 unsigned char *kernelbuf, long count)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700941{
942 unsigned long flags;
943 long result = 0, count1;
Takashi Iwai48c9d412005-11-17 13:56:51 +0100944 struct snd_rawmidi_runtime *runtime = substream->runtime;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700945
946 while (count > 0 && runtime->avail) {
947 count1 = runtime->buffer_size - runtime->appl_ptr;
948 if (count1 > count)
949 count1 = count;
950 spin_lock_irqsave(&runtime->lock, flags);
951 if (count1 > (int)runtime->avail)
952 count1 = runtime->avail;
Marcin Åšlusarz17596a82008-01-09 17:56:07 +0100953 if (kernelbuf)
954 memcpy(kernelbuf + result, runtime->buffer + runtime->appl_ptr, count1);
955 if (userbuf) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700956 spin_unlock_irqrestore(&runtime->lock, flags);
Marcin Åšlusarz17596a82008-01-09 17:56:07 +0100957 if (copy_to_user(userbuf + result,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700958 runtime->buffer + runtime->appl_ptr, count1)) {
959 return result > 0 ? result : -EFAULT;
960 }
961 spin_lock_irqsave(&runtime->lock, flags);
962 }
963 runtime->appl_ptr += count1;
964 runtime->appl_ptr %= runtime->buffer_size;
965 runtime->avail -= count1;
966 spin_unlock_irqrestore(&runtime->lock, flags);
967 result += count1;
968 count -= count1;
969 }
970 return result;
971}
972
Takashi Iwai48c9d412005-11-17 13:56:51 +0100973long snd_rawmidi_kernel_read(struct snd_rawmidi_substream *substream,
974 unsigned char *buf, long count)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700975{
976 snd_rawmidi_input_trigger(substream, 1);
Marcin Åšlusarz17596a82008-01-09 17:56:07 +0100977 return snd_rawmidi_kernel_read1(substream, NULL/*userbuf*/, buf, count);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700978}
Takashi Iwai6776a5d2014-02-27 16:00:17 +0100979EXPORT_SYMBOL(snd_rawmidi_kernel_read);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700980
Takashi Iwai48c9d412005-11-17 13:56:51 +0100981static ssize_t snd_rawmidi_read(struct file *file, char __user *buf, size_t count,
982 loff_t *offset)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700983{
984 long result;
985 int count1;
Takashi Iwai48c9d412005-11-17 13:56:51 +0100986 struct snd_rawmidi_file *rfile;
987 struct snd_rawmidi_substream *substream;
988 struct snd_rawmidi_runtime *runtime;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700989
990 rfile = file->private_data;
991 substream = rfile->input;
992 if (substream == NULL)
993 return -EIO;
994 runtime = substream->runtime;
995 snd_rawmidi_input_trigger(substream, 1);
996 result = 0;
997 while (count > 0) {
998 spin_lock_irq(&runtime->lock);
999 while (!snd_rawmidi_ready(substream)) {
1000 wait_queue_t wait;
1001 if ((file->f_flags & O_NONBLOCK) != 0 || result > 0) {
1002 spin_unlock_irq(&runtime->lock);
1003 return result > 0 ? result : -EAGAIN;
1004 }
1005 init_waitqueue_entry(&wait, current);
1006 add_wait_queue(&runtime->sleep, &wait);
1007 set_current_state(TASK_INTERRUPTIBLE);
1008 spin_unlock_irq(&runtime->lock);
1009 schedule();
1010 remove_wait_queue(&runtime->sleep, &wait);
Takashi Iwai0914f792012-10-16 16:43:39 +02001011 if (rfile->rmidi->card->shutdown)
1012 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001013 if (signal_pending(current))
1014 return result > 0 ? result : -ERESTARTSYS;
1015 if (!runtime->avail)
1016 return result > 0 ? result : -EIO;
1017 spin_lock_irq(&runtime->lock);
1018 }
1019 spin_unlock_irq(&runtime->lock);
Clemens Ladisch4d233592005-09-05 10:35:20 +02001020 count1 = snd_rawmidi_kernel_read1(substream,
Marcin Åšlusarz17596a82008-01-09 17:56:07 +01001021 (unsigned char __user *)buf,
1022 NULL/*kernelbuf*/,
1023 count);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001024 if (count1 < 0)
1025 return result > 0 ? result : count1;
1026 result += count1;
1027 buf += count1;
1028 count -= count1;
1029 }
1030 return result;
1031}
1032
1033/**
1034 * snd_rawmidi_transmit_empty - check whether the output buffer is empty
1035 * @substream: the rawmidi substream
Yacine Belkadieb7c06e2013-03-11 22:05:14 +01001036 *
1037 * Return: 1 if the internal output buffer is empty, 0 if not.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001038 */
Takashi Iwai48c9d412005-11-17 13:56:51 +01001039int snd_rawmidi_transmit_empty(struct snd_rawmidi_substream *substream)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001040{
Takashi Iwai48c9d412005-11-17 13:56:51 +01001041 struct snd_rawmidi_runtime *runtime = substream->runtime;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001042 int result;
1043 unsigned long flags;
1044
1045 if (runtime->buffer == NULL) {
Takashi Iwaica20d292014-02-04 18:21:39 +01001046 rmidi_dbg(substream->rmidi,
1047 "snd_rawmidi_transmit_empty: output is not active!!!\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001048 return 1;
1049 }
1050 spin_lock_irqsave(&runtime->lock, flags);
1051 result = runtime->avail >= runtime->buffer_size;
1052 spin_unlock_irqrestore(&runtime->lock, flags);
1053 return result;
1054}
Takashi Iwai6776a5d2014-02-27 16:00:17 +01001055EXPORT_SYMBOL(snd_rawmidi_transmit_empty);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001056
1057/**
1058 * snd_rawmidi_transmit_peek - copy data from the internal buffer
1059 * @substream: the rawmidi substream
1060 * @buffer: the buffer pointer
1061 * @count: data size to transfer
1062 *
1063 * Copies data from the internal output buffer to the given buffer.
1064 *
1065 * Call this in the interrupt handler when the midi output is ready,
1066 * and call snd_rawmidi_transmit_ack() after the transmission is
1067 * finished.
1068 *
Yacine Belkadieb7c06e2013-03-11 22:05:14 +01001069 * Return: The size of copied data, or a negative error code on failure.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001070 */
Takashi Iwai48c9d412005-11-17 13:56:51 +01001071int snd_rawmidi_transmit_peek(struct snd_rawmidi_substream *substream,
1072 unsigned char *buffer, int count)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001073{
1074 unsigned long flags;
1075 int result, count1;
Takashi Iwai48c9d412005-11-17 13:56:51 +01001076 struct snd_rawmidi_runtime *runtime = substream->runtime;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001077
1078 if (runtime->buffer == NULL) {
Takashi Iwaica20d292014-02-04 18:21:39 +01001079 rmidi_dbg(substream->rmidi,
1080 "snd_rawmidi_transmit_peek: output is not active!!!\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001081 return -EINVAL;
1082 }
1083 result = 0;
1084 spin_lock_irqsave(&runtime->lock, flags);
1085 if (runtime->avail >= runtime->buffer_size) {
1086 /* warning: lowlevel layer MUST trigger down the hardware */
1087 goto __skip;
1088 }
1089 if (count == 1) { /* special case, faster code */
1090 *buffer = runtime->buffer[runtime->hw_ptr];
1091 result++;
1092 } else {
1093 count1 = runtime->buffer_size - runtime->hw_ptr;
1094 if (count1 > count)
1095 count1 = count;
1096 if (count1 > (int)(runtime->buffer_size - runtime->avail))
1097 count1 = runtime->buffer_size - runtime->avail;
1098 memcpy(buffer, runtime->buffer + runtime->hw_ptr, count1);
1099 count -= count1;
1100 result += count1;
1101 if (count > 0) {
1102 if (count > (int)(runtime->buffer_size - runtime->avail - count1))
1103 count = runtime->buffer_size - runtime->avail - count1;
1104 memcpy(buffer + count1, runtime->buffer, count);
1105 result += count;
1106 }
1107 }
1108 __skip:
1109 spin_unlock_irqrestore(&runtime->lock, flags);
1110 return result;
1111}
Takashi Iwai6776a5d2014-02-27 16:00:17 +01001112EXPORT_SYMBOL(snd_rawmidi_transmit_peek);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001113
1114/**
1115 * snd_rawmidi_transmit_ack - acknowledge the transmission
1116 * @substream: the rawmidi substream
Masanari Iida0a114582014-02-09 00:47:36 +09001117 * @count: the transferred count
Linus Torvalds1da177e2005-04-16 15:20:36 -07001118 *
1119 * Advances the hardware pointer for the internal output buffer with
1120 * the given size and updates the condition.
1121 * Call after the transmission is finished.
1122 *
Yacine Belkadieb7c06e2013-03-11 22:05:14 +01001123 * Return: The advanced size if successful, or a negative error code on failure.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001124 */
Takashi Iwai48c9d412005-11-17 13:56:51 +01001125int snd_rawmidi_transmit_ack(struct snd_rawmidi_substream *substream, int count)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001126{
1127 unsigned long flags;
Takashi Iwai48c9d412005-11-17 13:56:51 +01001128 struct snd_rawmidi_runtime *runtime = substream->runtime;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001129
1130 if (runtime->buffer == NULL) {
Takashi Iwaica20d292014-02-04 18:21:39 +01001131 rmidi_dbg(substream->rmidi,
1132 "snd_rawmidi_transmit_ack: output is not active!!!\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001133 return -EINVAL;
1134 }
1135 spin_lock_irqsave(&runtime->lock, flags);
Takashi Iwai7eaa9432008-08-08 17:09:09 +02001136 snd_BUG_ON(runtime->avail + count > runtime->buffer_size);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001137 runtime->hw_ptr += count;
1138 runtime->hw_ptr %= runtime->buffer_size;
1139 runtime->avail += count;
1140 substream->bytes += count;
1141 if (count > 0) {
1142 if (runtime->drain || snd_rawmidi_ready(substream))
1143 wake_up(&runtime->sleep);
1144 }
1145 spin_unlock_irqrestore(&runtime->lock, flags);
1146 return count;
1147}
Takashi Iwai6776a5d2014-02-27 16:00:17 +01001148EXPORT_SYMBOL(snd_rawmidi_transmit_ack);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001149
1150/**
1151 * snd_rawmidi_transmit - copy from the buffer to the device
1152 * @substream: the rawmidi substream
Takashi Iwaidf8db932005-09-07 13:38:19 +02001153 * @buffer: the buffer pointer
Linus Torvalds1da177e2005-04-16 15:20:36 -07001154 * @count: the data size to transfer
1155 *
1156 * Copies data from the buffer to the device and advances the pointer.
1157 *
Yacine Belkadieb7c06e2013-03-11 22:05:14 +01001158 * Return: The copied size if successful, or a negative error code on failure.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001159 */
Takashi Iwai48c9d412005-11-17 13:56:51 +01001160int snd_rawmidi_transmit(struct snd_rawmidi_substream *substream,
1161 unsigned char *buffer, int count)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001162{
Takashi Iwai219df322008-11-03 08:17:05 +01001163 if (!substream->opened)
1164 return -EBADFD;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001165 count = snd_rawmidi_transmit_peek(substream, buffer, count);
1166 if (count < 0)
1167 return count;
1168 return snd_rawmidi_transmit_ack(substream, count);
1169}
Takashi Iwai6776a5d2014-02-27 16:00:17 +01001170EXPORT_SYMBOL(snd_rawmidi_transmit);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001171
Takashi Iwai48c9d412005-11-17 13:56:51 +01001172static long snd_rawmidi_kernel_write1(struct snd_rawmidi_substream *substream,
Marcin Åšlusarz17596a82008-01-09 17:56:07 +01001173 const unsigned char __user *userbuf,
1174 const unsigned char *kernelbuf,
1175 long count)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001176{
1177 unsigned long flags;
1178 long count1, result;
Takashi Iwai48c9d412005-11-17 13:56:51 +01001179 struct snd_rawmidi_runtime *runtime = substream->runtime;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001180
Takashi Iwai7eaa9432008-08-08 17:09:09 +02001181 if (snd_BUG_ON(!kernelbuf && !userbuf))
1182 return -EINVAL;
1183 if (snd_BUG_ON(!runtime->buffer))
1184 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001185
1186 result = 0;
1187 spin_lock_irqsave(&runtime->lock, flags);
1188 if (substream->append) {
1189 if ((long)runtime->avail < count) {
1190 spin_unlock_irqrestore(&runtime->lock, flags);
1191 return -EAGAIN;
1192 }
1193 }
1194 while (count > 0 && runtime->avail > 0) {
1195 count1 = runtime->buffer_size - runtime->appl_ptr;
1196 if (count1 > count)
1197 count1 = count;
1198 if (count1 > (long)runtime->avail)
1199 count1 = runtime->avail;
Marcin Åšlusarz17596a82008-01-09 17:56:07 +01001200 if (kernelbuf)
1201 memcpy(runtime->buffer + runtime->appl_ptr,
1202 kernelbuf + result, count1);
1203 else if (userbuf) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001204 spin_unlock_irqrestore(&runtime->lock, flags);
1205 if (copy_from_user(runtime->buffer + runtime->appl_ptr,
Marcin Åšlusarz17596a82008-01-09 17:56:07 +01001206 userbuf + result, count1)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001207 spin_lock_irqsave(&runtime->lock, flags);
1208 result = result > 0 ? result : -EFAULT;
1209 goto __end;
1210 }
1211 spin_lock_irqsave(&runtime->lock, flags);
1212 }
1213 runtime->appl_ptr += count1;
1214 runtime->appl_ptr %= runtime->buffer_size;
1215 runtime->avail -= count1;
1216 result += count1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001217 count -= count1;
1218 }
1219 __end:
1220 count1 = runtime->avail < runtime->buffer_size;
1221 spin_unlock_irqrestore(&runtime->lock, flags);
1222 if (count1)
1223 snd_rawmidi_output_trigger(substream, 1);
1224 return result;
1225}
1226
Takashi Iwai48c9d412005-11-17 13:56:51 +01001227long snd_rawmidi_kernel_write(struct snd_rawmidi_substream *substream,
1228 const unsigned char *buf, long count)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001229{
Marcin Åšlusarz17596a82008-01-09 17:56:07 +01001230 return snd_rawmidi_kernel_write1(substream, NULL, buf, count);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001231}
Takashi Iwai6776a5d2014-02-27 16:00:17 +01001232EXPORT_SYMBOL(snd_rawmidi_kernel_write);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001233
Takashi Iwai48c9d412005-11-17 13:56:51 +01001234static ssize_t snd_rawmidi_write(struct file *file, const char __user *buf,
1235 size_t count, loff_t *offset)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001236{
1237 long result, timeout;
1238 int count1;
Takashi Iwai48c9d412005-11-17 13:56:51 +01001239 struct snd_rawmidi_file *rfile;
1240 struct snd_rawmidi_runtime *runtime;
1241 struct snd_rawmidi_substream *substream;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001242
1243 rfile = file->private_data;
1244 substream = rfile->output;
1245 runtime = substream->runtime;
1246 /* we cannot put an atomic message to our buffer */
1247 if (substream->append && count > runtime->buffer_size)
1248 return -EIO;
1249 result = 0;
1250 while (count > 0) {
1251 spin_lock_irq(&runtime->lock);
1252 while (!snd_rawmidi_ready_append(substream, count)) {
1253 wait_queue_t wait;
1254 if (file->f_flags & O_NONBLOCK) {
1255 spin_unlock_irq(&runtime->lock);
1256 return result > 0 ? result : -EAGAIN;
1257 }
1258 init_waitqueue_entry(&wait, current);
1259 add_wait_queue(&runtime->sleep, &wait);
1260 set_current_state(TASK_INTERRUPTIBLE);
1261 spin_unlock_irq(&runtime->lock);
1262 timeout = schedule_timeout(30 * HZ);
1263 remove_wait_queue(&runtime->sleep, &wait);
Takashi Iwai0914f792012-10-16 16:43:39 +02001264 if (rfile->rmidi->card->shutdown)
1265 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001266 if (signal_pending(current))
1267 return result > 0 ? result : -ERESTARTSYS;
1268 if (!runtime->avail && !timeout)
1269 return result > 0 ? result : -EIO;
1270 spin_lock_irq(&runtime->lock);
1271 }
1272 spin_unlock_irq(&runtime->lock);
Marcin Åšlusarz17596a82008-01-09 17:56:07 +01001273 count1 = snd_rawmidi_kernel_write1(substream, buf, NULL, count);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001274 if (count1 < 0)
1275 return result > 0 ? result : count1;
1276 result += count1;
1277 buf += count1;
1278 if ((size_t)count1 < count && (file->f_flags & O_NONBLOCK))
1279 break;
1280 count -= count1;
1281 }
Christoph Hellwig6b2f3d12009-10-27 11:05:28 +01001282 if (file->f_flags & O_DSYNC) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001283 spin_lock_irq(&runtime->lock);
1284 while (runtime->avail != runtime->buffer_size) {
1285 wait_queue_t wait;
1286 unsigned int last_avail = runtime->avail;
1287 init_waitqueue_entry(&wait, current);
1288 add_wait_queue(&runtime->sleep, &wait);
1289 set_current_state(TASK_INTERRUPTIBLE);
1290 spin_unlock_irq(&runtime->lock);
1291 timeout = schedule_timeout(30 * HZ);
1292 remove_wait_queue(&runtime->sleep, &wait);
1293 if (signal_pending(current))
1294 return result > 0 ? result : -ERESTARTSYS;
1295 if (runtime->avail == last_avail && !timeout)
1296 return result > 0 ? result : -EIO;
1297 spin_lock_irq(&runtime->lock);
1298 }
1299 spin_unlock_irq(&runtime->lock);
1300 }
1301 return result;
1302}
1303
1304static unsigned int snd_rawmidi_poll(struct file *file, poll_table * wait)
1305{
Takashi Iwai48c9d412005-11-17 13:56:51 +01001306 struct snd_rawmidi_file *rfile;
1307 struct snd_rawmidi_runtime *runtime;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001308 unsigned int mask;
1309
1310 rfile = file->private_data;
1311 if (rfile->input != NULL) {
1312 runtime = rfile->input->runtime;
1313 snd_rawmidi_input_trigger(rfile->input, 1);
1314 poll_wait(file, &runtime->sleep, wait);
1315 }
1316 if (rfile->output != NULL) {
1317 runtime = rfile->output->runtime;
1318 poll_wait(file, &runtime->sleep, wait);
1319 }
1320 mask = 0;
1321 if (rfile->input != NULL) {
1322 if (snd_rawmidi_ready(rfile->input))
1323 mask |= POLLIN | POLLRDNORM;
1324 }
1325 if (rfile->output != NULL) {
1326 if (snd_rawmidi_ready(rfile->output))
1327 mask |= POLLOUT | POLLWRNORM;
1328 }
1329 return mask;
1330}
1331
1332/*
1333 */
1334#ifdef CONFIG_COMPAT
1335#include "rawmidi_compat.c"
1336#else
1337#define snd_rawmidi_ioctl_compat NULL
1338#endif
1339
1340/*
1341
1342 */
1343
Takashi Iwai48c9d412005-11-17 13:56:51 +01001344static void snd_rawmidi_proc_info_read(struct snd_info_entry *entry,
1345 struct snd_info_buffer *buffer)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001346{
Takashi Iwai48c9d412005-11-17 13:56:51 +01001347 struct snd_rawmidi *rmidi;
1348 struct snd_rawmidi_substream *substream;
1349 struct snd_rawmidi_runtime *runtime;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001350
1351 rmidi = entry->private_data;
1352 snd_iprintf(buffer, "%s\n\n", rmidi->name);
Ingo Molnar1a60d4c2006-01-16 16:29:08 +01001353 mutex_lock(&rmidi->open_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001354 if (rmidi->info_flags & SNDRV_RAWMIDI_INFO_OUTPUT) {
Johannes Berg9244b2c2006-10-05 16:02:22 +02001355 list_for_each_entry(substream,
1356 &rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substreams,
1357 list) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001358 snd_iprintf(buffer,
1359 "Output %d\n"
1360 " Tx bytes : %lu\n",
1361 substream->number,
1362 (unsigned long) substream->bytes);
1363 if (substream->opened) {
Clemens Ladisch7584af12009-11-10 10:14:04 +01001364 snd_iprintf(buffer,
1365 " Owner PID : %d\n",
1366 pid_vnr(substream->pid));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001367 runtime = substream->runtime;
1368 snd_iprintf(buffer,
1369 " Mode : %s\n"
1370 " Buffer size : %lu\n"
1371 " Avail : %lu\n",
1372 runtime->oss ? "OSS compatible" : "native",
1373 (unsigned long) runtime->buffer_size,
1374 (unsigned long) runtime->avail);
1375 }
1376 }
1377 }
1378 if (rmidi->info_flags & SNDRV_RAWMIDI_INFO_INPUT) {
Johannes Berg9244b2c2006-10-05 16:02:22 +02001379 list_for_each_entry(substream,
1380 &rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substreams,
1381 list) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001382 snd_iprintf(buffer,
1383 "Input %d\n"
1384 " Rx bytes : %lu\n",
1385 substream->number,
1386 (unsigned long) substream->bytes);
1387 if (substream->opened) {
Clemens Ladisch7584af12009-11-10 10:14:04 +01001388 snd_iprintf(buffer,
1389 " Owner PID : %d\n",
1390 pid_vnr(substream->pid));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001391 runtime = substream->runtime;
1392 snd_iprintf(buffer,
1393 " Buffer size : %lu\n"
1394 " Avail : %lu\n"
1395 " Overruns : %lu\n",
1396 (unsigned long) runtime->buffer_size,
1397 (unsigned long) runtime->avail,
1398 (unsigned long) runtime->xruns);
1399 }
1400 }
1401 }
Ingo Molnar1a60d4c2006-01-16 16:29:08 +01001402 mutex_unlock(&rmidi->open_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001403}
1404
1405/*
1406 * Register functions
1407 */
1408
Arjan van de Ven9c2e08c2007-02-12 00:55:37 -08001409static const struct file_operations snd_rawmidi_f_ops =
Linus Torvalds1da177e2005-04-16 15:20:36 -07001410{
1411 .owner = THIS_MODULE,
1412 .read = snd_rawmidi_read,
1413 .write = snd_rawmidi_write,
1414 .open = snd_rawmidi_open,
1415 .release = snd_rawmidi_release,
Takashi Iwai02f48652010-04-13 11:49:04 +02001416 .llseek = no_llseek,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001417 .poll = snd_rawmidi_poll,
1418 .unlocked_ioctl = snd_rawmidi_ioctl,
1419 .compat_ioctl = snd_rawmidi_ioctl_compat,
1420};
1421
Takashi Iwai48c9d412005-11-17 13:56:51 +01001422static int snd_rawmidi_alloc_substreams(struct snd_rawmidi *rmidi,
1423 struct snd_rawmidi_str *stream,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001424 int direction,
1425 int count)
1426{
Takashi Iwai48c9d412005-11-17 13:56:51 +01001427 struct snd_rawmidi_substream *substream;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001428 int idx;
1429
Linus Torvalds1da177e2005-04-16 15:20:36 -07001430 for (idx = 0; idx < count; idx++) {
Takashi Iwaica2c0962005-09-09 14:20:23 +02001431 substream = kzalloc(sizeof(*substream), GFP_KERNEL);
Takashi Iwaiec0e9932015-03-10 15:42:14 +01001432 if (!substream)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001433 return -ENOMEM;
1434 substream->stream = direction;
1435 substream->number = idx;
1436 substream->rmidi = rmidi;
1437 substream->pstr = stream;
1438 list_add_tail(&substream->list, &stream->substreams);
1439 stream->substream_count++;
1440 }
1441 return 0;
1442}
1443
Takashi Iwaiaee50122015-01-29 17:55:52 +01001444static void release_rawmidi_device(struct device *dev)
1445{
1446 kfree(container_of(dev, struct snd_rawmidi, dev));
1447}
1448
Linus Torvalds1da177e2005-04-16 15:20:36 -07001449/**
1450 * snd_rawmidi_new - create a rawmidi instance
1451 * @card: the card instance
1452 * @id: the id string
1453 * @device: the device index
1454 * @output_count: the number of output streams
1455 * @input_count: the number of input streams
1456 * @rrawmidi: the pointer to store the new rawmidi instance
1457 *
1458 * Creates a new rawmidi instance.
1459 * Use snd_rawmidi_set_ops() to set the operators to the new instance.
1460 *
Yacine Belkadieb7c06e2013-03-11 22:05:14 +01001461 * Return: Zero if successful, or a negative error code on failure.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001462 */
Takashi Iwai48c9d412005-11-17 13:56:51 +01001463int snd_rawmidi_new(struct snd_card *card, char *id, int device,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001464 int output_count, int input_count,
Takashi Iwai48c9d412005-11-17 13:56:51 +01001465 struct snd_rawmidi ** rrawmidi)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001466{
Takashi Iwai48c9d412005-11-17 13:56:51 +01001467 struct snd_rawmidi *rmidi;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001468 int err;
Takashi Iwai48c9d412005-11-17 13:56:51 +01001469 static struct snd_device_ops ops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001470 .dev_free = snd_rawmidi_dev_free,
1471 .dev_register = snd_rawmidi_dev_register,
1472 .dev_disconnect = snd_rawmidi_dev_disconnect,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001473 };
1474
Takashi Iwai7eaa9432008-08-08 17:09:09 +02001475 if (snd_BUG_ON(!card))
1476 return -ENXIO;
1477 if (rrawmidi)
1478 *rrawmidi = NULL;
Takashi Iwaica2c0962005-09-09 14:20:23 +02001479 rmidi = kzalloc(sizeof(*rmidi), GFP_KERNEL);
Takashi Iwaiec0e9932015-03-10 15:42:14 +01001480 if (!rmidi)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001481 return -ENOMEM;
1482 rmidi->card = card;
1483 rmidi->device = device;
Ingo Molnar1a60d4c2006-01-16 16:29:08 +01001484 mutex_init(&rmidi->open_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001485 init_waitqueue_head(&rmidi->open_wait);
Akinobu Mitac13893d2006-11-23 12:02:33 +01001486 INIT_LIST_HEAD(&rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substreams);
1487 INIT_LIST_HEAD(&rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substreams);
1488
Linus Torvalds1da177e2005-04-16 15:20:36 -07001489 if (id != NULL)
1490 strlcpy(rmidi->id, id, sizeof(rmidi->id));
Takashi Iwaiaee50122015-01-29 17:55:52 +01001491
1492 snd_device_initialize(&rmidi->dev, card);
1493 rmidi->dev.release = release_rawmidi_device;
1494 dev_set_name(&rmidi->dev, "midiC%iD%i", card->number, device);
1495
Takashi Iwai73e77ba2005-11-17 17:44:01 +01001496 if ((err = snd_rawmidi_alloc_substreams(rmidi,
1497 &rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT],
1498 SNDRV_RAWMIDI_STREAM_INPUT,
1499 input_count)) < 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001500 snd_rawmidi_free(rmidi);
1501 return err;
1502 }
Takashi Iwai73e77ba2005-11-17 17:44:01 +01001503 if ((err = snd_rawmidi_alloc_substreams(rmidi,
1504 &rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT],
1505 SNDRV_RAWMIDI_STREAM_OUTPUT,
1506 output_count)) < 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001507 snd_rawmidi_free(rmidi);
1508 return err;
1509 }
1510 if ((err = snd_device_new(card, SNDRV_DEV_RAWMIDI, rmidi, &ops)) < 0) {
1511 snd_rawmidi_free(rmidi);
1512 return err;
1513 }
Takashi Iwai7eaa9432008-08-08 17:09:09 +02001514 if (rrawmidi)
1515 *rrawmidi = rmidi;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001516 return 0;
1517}
Takashi Iwai6776a5d2014-02-27 16:00:17 +01001518EXPORT_SYMBOL(snd_rawmidi_new);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001519
Takashi Iwai48c9d412005-11-17 13:56:51 +01001520static void snd_rawmidi_free_substreams(struct snd_rawmidi_str *stream)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001521{
Takashi Iwai48c9d412005-11-17 13:56:51 +01001522 struct snd_rawmidi_substream *substream;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001523
1524 while (!list_empty(&stream->substreams)) {
Takashi Iwai48c9d412005-11-17 13:56:51 +01001525 substream = list_entry(stream->substreams.next, struct snd_rawmidi_substream, list);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001526 list_del(&substream->list);
1527 kfree(substream);
1528 }
1529}
1530
Takashi Iwai48c9d412005-11-17 13:56:51 +01001531static int snd_rawmidi_free(struct snd_rawmidi *rmidi)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001532{
Takashi Iwai7eaa9432008-08-08 17:09:09 +02001533 if (!rmidi)
1534 return 0;
Takashi Iwaic4614822006-06-23 14:38:23 +02001535
1536 snd_info_free_entry(rmidi->proc_entry);
1537 rmidi->proc_entry = NULL;
1538 mutex_lock(&register_mutex);
1539 if (rmidi->ops && rmidi->ops->dev_unregister)
1540 rmidi->ops->dev_unregister(rmidi);
1541 mutex_unlock(&register_mutex);
1542
Linus Torvalds1da177e2005-04-16 15:20:36 -07001543 snd_rawmidi_free_substreams(&rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT]);
1544 snd_rawmidi_free_substreams(&rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT]);
1545 if (rmidi->private_free)
1546 rmidi->private_free(rmidi);
Takashi Iwaiaee50122015-01-29 17:55:52 +01001547 put_device(&rmidi->dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001548 return 0;
1549}
1550
Takashi Iwai48c9d412005-11-17 13:56:51 +01001551static int snd_rawmidi_dev_free(struct snd_device *device)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001552{
Takashi Iwai48c9d412005-11-17 13:56:51 +01001553 struct snd_rawmidi *rmidi = device->device_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001554 return snd_rawmidi_free(rmidi);
1555}
1556
1557#if defined(CONFIG_SND_SEQUENCER) || (defined(MODULE) && defined(CONFIG_SND_SEQUENCER_MODULE))
Takashi Iwai48c9d412005-11-17 13:56:51 +01001558static void snd_rawmidi_dev_seq_free(struct snd_seq_device *device)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001559{
Takashi Iwai48c9d412005-11-17 13:56:51 +01001560 struct snd_rawmidi *rmidi = device->private_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001561 rmidi->seq_dev = NULL;
1562}
1563#endif
1564
Takashi Iwai48c9d412005-11-17 13:56:51 +01001565static int snd_rawmidi_dev_register(struct snd_device *device)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001566{
Clemens Ladischf87135f2005-11-20 14:06:59 +01001567 int err;
Takashi Iwai48c9d412005-11-17 13:56:51 +01001568 struct snd_info_entry *entry;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001569 char name[16];
Takashi Iwai48c9d412005-11-17 13:56:51 +01001570 struct snd_rawmidi *rmidi = device->device_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001571
1572 if (rmidi->device >= SNDRV_RAWMIDI_DEVICES)
1573 return -ENOMEM;
Ingo Molnar1a60d4c2006-01-16 16:29:08 +01001574 mutex_lock(&register_mutex);
Clemens Ladischf87135f2005-11-20 14:06:59 +01001575 if (snd_rawmidi_search(rmidi->card, rmidi->device)) {
Ingo Molnar1a60d4c2006-01-16 16:29:08 +01001576 mutex_unlock(&register_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001577 return -EBUSY;
1578 }
Clemens Ladischf87135f2005-11-20 14:06:59 +01001579 list_add_tail(&rmidi->list, &snd_rawmidi_devices);
Takashi Iwai40a4b262015-01-30 08:34:58 +01001580 err = snd_register_device(SNDRV_DEVICE_TYPE_RAWMIDI,
1581 rmidi->card, rmidi->device,
1582 &snd_rawmidi_f_ops, rmidi, &rmidi->dev);
Takashi Iwaiaee50122015-01-29 17:55:52 +01001583 if (err < 0) {
1584 rmidi_err(rmidi, "unable to register\n");
Clemens Ladischf87135f2005-11-20 14:06:59 +01001585 list_del(&rmidi->list);
Ingo Molnar1a60d4c2006-01-16 16:29:08 +01001586 mutex_unlock(&register_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001587 return err;
1588 }
1589 if (rmidi->ops && rmidi->ops->dev_register &&
1590 (err = rmidi->ops->dev_register(rmidi)) < 0) {
Takashi Iwai40a4b262015-01-30 08:34:58 +01001591 snd_unregister_device(&rmidi->dev);
Clemens Ladischf87135f2005-11-20 14:06:59 +01001592 list_del(&rmidi->list);
Ingo Molnar1a60d4c2006-01-16 16:29:08 +01001593 mutex_unlock(&register_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001594 return err;
1595 }
1596#ifdef CONFIG_SND_OSSEMUL
1597 rmidi->ossreg = 0;
1598 if ((int)rmidi->device == midi_map[rmidi->card->number]) {
1599 if (snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_MIDI,
Clemens Ladischf87135f2005-11-20 14:06:59 +01001600 rmidi->card, 0, &snd_rawmidi_f_ops,
Takashi Iwai80d7d772014-02-04 13:51:45 +01001601 rmidi) < 0) {
Takashi Iwaica20d292014-02-04 18:21:39 +01001602 rmidi_err(rmidi,
1603 "unable to register OSS rawmidi device %i:%i\n",
1604 rmidi->card->number, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001605 } else {
1606 rmidi->ossreg++;
1607#ifdef SNDRV_OSS_INFO_DEV_MIDI
1608 snd_oss_info_register(SNDRV_OSS_INFO_DEV_MIDI, rmidi->card->number, rmidi->name);
1609#endif
1610 }
1611 }
1612 if ((int)rmidi->device == amidi_map[rmidi->card->number]) {
1613 if (snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_MIDI,
Clemens Ladischf87135f2005-11-20 14:06:59 +01001614 rmidi->card, 1, &snd_rawmidi_f_ops,
Takashi Iwai80d7d772014-02-04 13:51:45 +01001615 rmidi) < 0) {
Takashi Iwaica20d292014-02-04 18:21:39 +01001616 rmidi_err(rmidi,
1617 "unable to register OSS rawmidi device %i:%i\n",
1618 rmidi->card->number, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001619 } else {
1620 rmidi->ossreg++;
1621 }
1622 }
1623#endif /* CONFIG_SND_OSSEMUL */
Ingo Molnar1a60d4c2006-01-16 16:29:08 +01001624 mutex_unlock(&register_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001625 sprintf(name, "midi%d", rmidi->device);
1626 entry = snd_info_create_card_entry(rmidi->card, name, rmidi->card->proc_root);
1627 if (entry) {
1628 entry->private_data = rmidi;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001629 entry->c.text.read = snd_rawmidi_proc_info_read;
1630 if (snd_info_register(entry) < 0) {
1631 snd_info_free_entry(entry);
1632 entry = NULL;
1633 }
1634 }
1635 rmidi->proc_entry = entry;
1636#if defined(CONFIG_SND_SEQUENCER) || (defined(MODULE) && defined(CONFIG_SND_SEQUENCER_MODULE))
1637 if (!rmidi->ops || !rmidi->ops->dev_register) { /* own registration mechanism */
1638 if (snd_seq_device_new(rmidi->card, rmidi->device, SNDRV_SEQ_DEV_ID_MIDISYNTH, 0, &rmidi->seq_dev) >= 0) {
1639 rmidi->seq_dev->private_data = rmidi;
1640 rmidi->seq_dev->private_free = snd_rawmidi_dev_seq_free;
1641 sprintf(rmidi->seq_dev->name, "MIDI %d-%d", rmidi->card->number, rmidi->device);
1642 snd_device_register(rmidi->card, rmidi->seq_dev);
1643 }
1644 }
1645#endif
1646 return 0;
1647}
1648
Takashi Iwai48c9d412005-11-17 13:56:51 +01001649static int snd_rawmidi_dev_disconnect(struct snd_device *device)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001650{
Takashi Iwai48c9d412005-11-17 13:56:51 +01001651 struct snd_rawmidi *rmidi = device->device_data;
Takashi Iwai0914f792012-10-16 16:43:39 +02001652 int dir;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001653
Ingo Molnar1a60d4c2006-01-16 16:29:08 +01001654 mutex_lock(&register_mutex);
Takashi Iwai0914f792012-10-16 16:43:39 +02001655 mutex_lock(&rmidi->open_mutex);
1656 wake_up(&rmidi->open_wait);
Clemens Ladischf87135f2005-11-20 14:06:59 +01001657 list_del_init(&rmidi->list);
Takashi Iwai0914f792012-10-16 16:43:39 +02001658 for (dir = 0; dir < 2; dir++) {
1659 struct snd_rawmidi_substream *s;
1660 list_for_each_entry(s, &rmidi->streams[dir].substreams, list) {
1661 if (s->runtime)
1662 wake_up(&s->runtime->sleep);
1663 }
1664 }
1665
Linus Torvalds1da177e2005-04-16 15:20:36 -07001666#ifdef CONFIG_SND_OSSEMUL
1667 if (rmidi->ossreg) {
1668 if ((int)rmidi->device == midi_map[rmidi->card->number]) {
1669 snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_MIDI, rmidi->card, 0);
1670#ifdef SNDRV_OSS_INFO_DEV_MIDI
1671 snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_MIDI, rmidi->card->number);
1672#endif
1673 }
1674 if ((int)rmidi->device == amidi_map[rmidi->card->number])
1675 snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_MIDI, rmidi->card, 1);
1676 rmidi->ossreg = 0;
1677 }
1678#endif /* CONFIG_SND_OSSEMUL */
Takashi Iwai40a4b262015-01-30 08:34:58 +01001679 snd_unregister_device(&rmidi->dev);
Takashi Iwai0914f792012-10-16 16:43:39 +02001680 mutex_unlock(&rmidi->open_mutex);
Ingo Molnar1a60d4c2006-01-16 16:29:08 +01001681 mutex_unlock(&register_mutex);
Takashi Iwaic4614822006-06-23 14:38:23 +02001682 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001683}
1684
1685/**
1686 * snd_rawmidi_set_ops - set the rawmidi operators
1687 * @rmidi: the rawmidi instance
1688 * @stream: the stream direction, SNDRV_RAWMIDI_STREAM_XXX
1689 * @ops: the operator table
1690 *
1691 * Sets the rawmidi operators for the given stream direction.
1692 */
Takashi Iwai48c9d412005-11-17 13:56:51 +01001693void snd_rawmidi_set_ops(struct snd_rawmidi *rmidi, int stream,
1694 struct snd_rawmidi_ops *ops)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001695{
Takashi Iwai48c9d412005-11-17 13:56:51 +01001696 struct snd_rawmidi_substream *substream;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001697
Johannes Berg9244b2c2006-10-05 16:02:22 +02001698 list_for_each_entry(substream, &rmidi->streams[stream].substreams, list)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001699 substream->ops = ops;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001700}
Takashi Iwai6776a5d2014-02-27 16:00:17 +01001701EXPORT_SYMBOL(snd_rawmidi_set_ops);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001702
1703/*
1704 * ENTRY functions
1705 */
1706
1707static int __init alsa_rawmidi_init(void)
1708{
1709
1710 snd_ctl_register_ioctl(snd_rawmidi_control_ioctl);
1711 snd_ctl_register_ioctl_compat(snd_rawmidi_control_ioctl);
1712#ifdef CONFIG_SND_OSSEMUL
1713 { int i;
1714 /* check device map table */
1715 for (i = 0; i < SNDRV_CARDS; i++) {
1716 if (midi_map[i] < 0 || midi_map[i] >= SNDRV_RAWMIDI_DEVICES) {
Takashi Iwaica20d292014-02-04 18:21:39 +01001717 pr_err("ALSA: rawmidi: invalid midi_map[%d] = %d\n",
1718 i, midi_map[i]);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001719 midi_map[i] = 0;
1720 }
1721 if (amidi_map[i] < 0 || amidi_map[i] >= SNDRV_RAWMIDI_DEVICES) {
Takashi Iwaica20d292014-02-04 18:21:39 +01001722 pr_err("ALSA: rawmidi: invalid amidi_map[%d] = %d\n",
1723 i, amidi_map[i]);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001724 amidi_map[i] = 1;
1725 }
1726 }
1727 }
1728#endif /* CONFIG_SND_OSSEMUL */
1729 return 0;
1730}
1731
1732static void __exit alsa_rawmidi_exit(void)
1733{
1734 snd_ctl_unregister_ioctl(snd_rawmidi_control_ioctl);
1735 snd_ctl_unregister_ioctl_compat(snd_rawmidi_control_ioctl);
1736}
1737
1738module_init(alsa_rawmidi_init)
1739module_exit(alsa_rawmidi_exit)