11da177e4SLinus Torvalds #ifndef __SOUND_RAWMIDI_H 21da177e4SLinus Torvalds #define __SOUND_RAWMIDI_H 31da177e4SLinus Torvalds 41da177e4SLinus Torvalds /* 51da177e4SLinus Torvalds * Abstract layer for MIDI v1.0 stream 6c1017a4cSJaroslav Kysela * Copyright (c) by Jaroslav Kysela <perex@perex.cz> 71da177e4SLinus Torvalds * 81da177e4SLinus Torvalds * 91da177e4SLinus Torvalds * This program is free software; you can redistribute it and/or modify 101da177e4SLinus Torvalds * it under the terms of the GNU General Public License as published by 111da177e4SLinus Torvalds * the Free Software Foundation; either version 2 of the License, or 121da177e4SLinus Torvalds * (at your option) any later version. 131da177e4SLinus Torvalds * 141da177e4SLinus Torvalds * This program is distributed in the hope that it will be useful, 151da177e4SLinus Torvalds * but WITHOUT ANY WARRANTY; without even the implied warranty of 161da177e4SLinus Torvalds * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 171da177e4SLinus Torvalds * GNU General Public License for more details. 181da177e4SLinus Torvalds * 191da177e4SLinus Torvalds * You should have received a copy of the GNU General Public License 201da177e4SLinus Torvalds * along with this program; if not, write to the Free Software 211da177e4SLinus Torvalds * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 221da177e4SLinus Torvalds * 231da177e4SLinus Torvalds */ 241da177e4SLinus Torvalds 251da177e4SLinus Torvalds #include <sound/asound.h> 261da177e4SLinus Torvalds #include <linux/interrupt.h> 271da177e4SLinus Torvalds #include <linux/spinlock.h> 281da177e4SLinus Torvalds #include <linux/wait.h> 291a60d4c5SIngo Molnar #include <linux/mutex.h> 30b3c705aaSTakashi Iwai #include <linux/workqueue.h> 311da177e4SLinus Torvalds 321da177e4SLinus Torvalds #if defined(CONFIG_SND_SEQUENCER) || defined(CONFIG_SND_SEQUENCER_MODULE) 33a1ce3928SDavid Howells #include <sound/seq_device.h> 341da177e4SLinus Torvalds #endif 351da177e4SLinus Torvalds 361da177e4SLinus Torvalds /* 371da177e4SLinus Torvalds * Raw MIDI interface 381da177e4SLinus Torvalds */ 391da177e4SLinus Torvalds 401da177e4SLinus Torvalds #define SNDRV_RAWMIDI_DEVICES 8 411da177e4SLinus Torvalds 421da177e4SLinus Torvalds #define SNDRV_RAWMIDI_LFLG_OUTPUT (1<<0) 431da177e4SLinus Torvalds #define SNDRV_RAWMIDI_LFLG_INPUT (1<<1) 441da177e4SLinus Torvalds #define SNDRV_RAWMIDI_LFLG_OPEN (3<<0) 451da177e4SLinus Torvalds #define SNDRV_RAWMIDI_LFLG_APPEND (1<<2) 461da177e4SLinus Torvalds 4748c9d417STakashi Iwai struct snd_rawmidi; 4848c9d417STakashi Iwai struct snd_rawmidi_substream; 49a7b928acSClemens Ladisch struct snd_seq_port_info; 507584af10SClemens Ladisch struct pid; 511da177e4SLinus Torvalds 5248c9d417STakashi Iwai struct snd_rawmidi_ops { 5348c9d417STakashi Iwai int (*open) (struct snd_rawmidi_substream * substream); 5448c9d417STakashi Iwai int (*close) (struct snd_rawmidi_substream * substream); 5548c9d417STakashi Iwai void (*trigger) (struct snd_rawmidi_substream * substream, int up); 5648c9d417STakashi Iwai void (*drain) (struct snd_rawmidi_substream * substream); 5748c9d417STakashi Iwai }; 581da177e4SLinus Torvalds 5948c9d417STakashi Iwai struct snd_rawmidi_global_ops { 6048c9d417STakashi Iwai int (*dev_register) (struct snd_rawmidi * rmidi); 6148c9d417STakashi Iwai int (*dev_unregister) (struct snd_rawmidi * rmidi); 62a7b928acSClemens Ladisch void (*get_port_info)(struct snd_rawmidi *rmidi, int number, 63a7b928acSClemens Ladisch struct snd_seq_port_info *info); 6448c9d417STakashi Iwai }; 651da177e4SLinus Torvalds 6648c9d417STakashi Iwai struct snd_rawmidi_runtime { 67b3c705aaSTakashi Iwai struct snd_rawmidi_substream *substream; 681da177e4SLinus Torvalds unsigned int drain: 1, /* drain stage */ 691da177e4SLinus Torvalds oss: 1; /* OSS compatible mode */ 701da177e4SLinus Torvalds /* midi stream buffer */ 711da177e4SLinus Torvalds unsigned char *buffer; /* buffer for MIDI data */ 721da177e4SLinus Torvalds size_t buffer_size; /* size of buffer */ 731da177e4SLinus Torvalds size_t appl_ptr; /* application pointer */ 741da177e4SLinus Torvalds size_t hw_ptr; /* hardware pointer */ 751da177e4SLinus Torvalds size_t avail_min; /* min avail for wakeup */ 761da177e4SLinus Torvalds size_t avail; /* max used buffer for wakeup */ 771da177e4SLinus Torvalds size_t xruns; /* over/underruns counter */ 781da177e4SLinus Torvalds /* misc */ 791da177e4SLinus Torvalds spinlock_t lock; 801da177e4SLinus Torvalds wait_queue_head_t sleep; 811da177e4SLinus Torvalds /* event handler (new bytes, input only) */ 8248c9d417STakashi Iwai void (*event)(struct snd_rawmidi_substream *substream); 831da177e4SLinus Torvalds /* defers calls to event [input] or ops->trigger [output] */ 84b3c705aaSTakashi Iwai struct work_struct event_work; 851da177e4SLinus Torvalds /* private data */ 861da177e4SLinus Torvalds void *private_data; 8748c9d417STakashi Iwai void (*private_free)(struct snd_rawmidi_substream *substream); 881da177e4SLinus Torvalds }; 891da177e4SLinus Torvalds 9048c9d417STakashi Iwai struct snd_rawmidi_substream { 911da177e4SLinus Torvalds struct list_head list; /* list of all substream for given stream */ 921da177e4SLinus Torvalds int stream; /* direction */ 931da177e4SLinus Torvalds int number; /* substream number */ 941da177e4SLinus Torvalds unsigned int opened: 1, /* open flag */ 951da177e4SLinus Torvalds append: 1, /* append flag (merge more streams) */ 961da177e4SLinus Torvalds active_sensing: 1; /* send active sensing when close */ 971da177e4SLinus Torvalds int use_count; /* use counter (for output) */ 981da177e4SLinus Torvalds size_t bytes; 9948c9d417STakashi Iwai struct snd_rawmidi *rmidi; 10048c9d417STakashi Iwai struct snd_rawmidi_str *pstr; 1011da177e4SLinus Torvalds char name[32]; 10248c9d417STakashi Iwai struct snd_rawmidi_runtime *runtime; 1037584af10SClemens Ladisch struct pid *pid; 1041da177e4SLinus Torvalds /* hardware layer */ 10548c9d417STakashi Iwai struct snd_rawmidi_ops *ops; 1061da177e4SLinus Torvalds }; 1071da177e4SLinus Torvalds 10848c9d417STakashi Iwai struct snd_rawmidi_file { 10948c9d417STakashi Iwai struct snd_rawmidi *rmidi; 11048c9d417STakashi Iwai struct snd_rawmidi_substream *input; 11148c9d417STakashi Iwai struct snd_rawmidi_substream *output; 11248c9d417STakashi Iwai }; 1131da177e4SLinus Torvalds 11448c9d417STakashi Iwai struct snd_rawmidi_str { 1151da177e4SLinus Torvalds unsigned int substream_count; 1161da177e4SLinus Torvalds unsigned int substream_opened; 1171da177e4SLinus Torvalds struct list_head substreams; 1181da177e4SLinus Torvalds }; 1191da177e4SLinus Torvalds 12048c9d417STakashi Iwai struct snd_rawmidi { 12148c9d417STakashi Iwai struct snd_card *card; 122f87135f5SClemens Ladisch struct list_head list; 1231da177e4SLinus Torvalds unsigned int device; /* device number */ 1241da177e4SLinus Torvalds unsigned int info_flags; /* SNDRV_RAWMIDI_INFO_XXXX */ 1251da177e4SLinus Torvalds char id[64]; 1261da177e4SLinus Torvalds char name[80]; 1271da177e4SLinus Torvalds 1281da177e4SLinus Torvalds #ifdef CONFIG_SND_OSSEMUL 1291da177e4SLinus Torvalds int ossreg; 1301da177e4SLinus Torvalds #endif 1311da177e4SLinus Torvalds 13248c9d417STakashi Iwai struct snd_rawmidi_global_ops *ops; 1331da177e4SLinus Torvalds 13448c9d417STakashi Iwai struct snd_rawmidi_str streams[2]; 1351da177e4SLinus Torvalds 1361da177e4SLinus Torvalds void *private_data; 13748c9d417STakashi Iwai void (*private_free) (struct snd_rawmidi *rmidi); 1381da177e4SLinus Torvalds 1391a60d4c5SIngo Molnar struct mutex open_mutex; 1401da177e4SLinus Torvalds wait_queue_head_t open_wait; 1411da177e4SLinus Torvalds 14248c9d417STakashi Iwai struct snd_info_entry *dev; 14348c9d417STakashi Iwai struct snd_info_entry *proc_entry; 1441da177e4SLinus Torvalds 1451da177e4SLinus Torvalds #if defined(CONFIG_SND_SEQUENCER) || defined(CONFIG_SND_SEQUENCER_MODULE) 14648c9d417STakashi Iwai struct snd_seq_device *seq_dev; 1471da177e4SLinus Torvalds #endif 1481da177e4SLinus Torvalds }; 1491da177e4SLinus Torvalds 1501da177e4SLinus Torvalds /* main rawmidi functions */ 1511da177e4SLinus Torvalds 15248c9d417STakashi Iwai int snd_rawmidi_new(struct snd_card *card, char *id, int device, 1531da177e4SLinus Torvalds int output_count, int input_count, 15448c9d417STakashi Iwai struct snd_rawmidi **rmidi); 15548c9d417STakashi Iwai void snd_rawmidi_set_ops(struct snd_rawmidi *rmidi, int stream, 15648c9d417STakashi Iwai struct snd_rawmidi_ops *ops); 1571da177e4SLinus Torvalds 1581da177e4SLinus Torvalds /* callbacks */ 1591da177e4SLinus Torvalds 16048c9d417STakashi Iwai void snd_rawmidi_receive_reset(struct snd_rawmidi_substream *substream); 16148c9d417STakashi Iwai int snd_rawmidi_receive(struct snd_rawmidi_substream *substream, 16248c9d417STakashi Iwai const unsigned char *buffer, int count); 16348c9d417STakashi Iwai void snd_rawmidi_transmit_reset(struct snd_rawmidi_substream *substream); 16448c9d417STakashi Iwai int snd_rawmidi_transmit_empty(struct snd_rawmidi_substream *substream); 16548c9d417STakashi Iwai int snd_rawmidi_transmit_peek(struct snd_rawmidi_substream *substream, 16648c9d417STakashi Iwai unsigned char *buffer, int count); 16748c9d417STakashi Iwai int snd_rawmidi_transmit_ack(struct snd_rawmidi_substream *substream, int count); 16848c9d417STakashi Iwai int snd_rawmidi_transmit(struct snd_rawmidi_substream *substream, 16948c9d417STakashi Iwai unsigned char *buffer, int count); 1701da177e4SLinus Torvalds 1711da177e4SLinus Torvalds /* main midi functions */ 1721da177e4SLinus Torvalds 17348c9d417STakashi Iwai int snd_rawmidi_info_select(struct snd_card *card, struct snd_rawmidi_info *info); 174f87135f5SClemens Ladisch int snd_rawmidi_kernel_open(struct snd_card *card, int device, int subdevice, 175f87135f5SClemens Ladisch int mode, struct snd_rawmidi_file *rfile); 17648c9d417STakashi Iwai int snd_rawmidi_kernel_release(struct snd_rawmidi_file *rfile); 17748c9d417STakashi Iwai int snd_rawmidi_output_params(struct snd_rawmidi_substream *substream, 17848c9d417STakashi Iwai struct snd_rawmidi_params *params); 17948c9d417STakashi Iwai int snd_rawmidi_input_params(struct snd_rawmidi_substream *substream, 18048c9d417STakashi Iwai struct snd_rawmidi_params *params); 18148c9d417STakashi Iwai int snd_rawmidi_drop_output(struct snd_rawmidi_substream *substream); 18248c9d417STakashi Iwai int snd_rawmidi_drain_output(struct snd_rawmidi_substream *substream); 18348c9d417STakashi Iwai int snd_rawmidi_drain_input(struct snd_rawmidi_substream *substream); 18448c9d417STakashi Iwai long snd_rawmidi_kernel_read(struct snd_rawmidi_substream *substream, 18548c9d417STakashi Iwai unsigned char *buf, long count); 18648c9d417STakashi Iwai long snd_rawmidi_kernel_write(struct snd_rawmidi_substream *substream, 18748c9d417STakashi Iwai const unsigned char *buf, long count); 1881da177e4SLinus Torvalds 1891da177e4SLinus Torvalds #endif /* __SOUND_RAWMIDI_H */ 190