11a59d1b8SThomas Gleixner /* SPDX-License-Identifier: GPL-2.0-or-later */ 21da177e4SLinus Torvalds #ifndef __SOUND_RAWMIDI_H 31da177e4SLinus Torvalds #define __SOUND_RAWMIDI_H 41da177e4SLinus Torvalds 51da177e4SLinus Torvalds /* 61da177e4SLinus Torvalds * Abstract layer for MIDI v1.0 stream 7c1017a4cSJaroslav Kysela * Copyright (c) by Jaroslav Kysela <perex@perex.cz> 81da177e4SLinus Torvalds */ 91da177e4SLinus Torvalds 101da177e4SLinus Torvalds #include <sound/asound.h> 111da177e4SLinus Torvalds #include <linux/interrupt.h> 121da177e4SLinus Torvalds #include <linux/spinlock.h> 131da177e4SLinus Torvalds #include <linux/wait.h> 141a60d4c5SIngo Molnar #include <linux/mutex.h> 15b3c705aaSTakashi Iwai #include <linux/workqueue.h> 16aee5012fSTakashi Iwai #include <linux/device.h> 171da177e4SLinus Torvalds 186d2412b8STakashi Iwai #if IS_ENABLED(CONFIG_SND_SEQUENCER) 19a1ce3928SDavid Howells #include <sound/seq_device.h> 201da177e4SLinus Torvalds #endif 211da177e4SLinus Torvalds 221da177e4SLinus Torvalds /* 231da177e4SLinus Torvalds * Raw MIDI interface 241da177e4SLinus Torvalds */ 251da177e4SLinus Torvalds 261da177e4SLinus Torvalds #define SNDRV_RAWMIDI_DEVICES 8 271da177e4SLinus Torvalds 281da177e4SLinus Torvalds #define SNDRV_RAWMIDI_LFLG_OUTPUT (1<<0) 291da177e4SLinus Torvalds #define SNDRV_RAWMIDI_LFLG_INPUT (1<<1) 301da177e4SLinus Torvalds #define SNDRV_RAWMIDI_LFLG_OPEN (3<<0) 311da177e4SLinus Torvalds #define SNDRV_RAWMIDI_LFLG_APPEND (1<<2) 321da177e4SLinus Torvalds 3348c9d417STakashi Iwai struct snd_rawmidi; 3448c9d417STakashi Iwai struct snd_rawmidi_substream; 35a7b928acSClemens Ladisch struct snd_seq_port_info; 367584af10SClemens Ladisch struct pid; 371da177e4SLinus Torvalds 3848c9d417STakashi Iwai struct snd_rawmidi_ops { 3948c9d417STakashi Iwai int (*open) (struct snd_rawmidi_substream * substream); 4048c9d417STakashi Iwai int (*close) (struct snd_rawmidi_substream * substream); 4148c9d417STakashi Iwai void (*trigger) (struct snd_rawmidi_substream * substream, int up); 4248c9d417STakashi Iwai void (*drain) (struct snd_rawmidi_substream * substream); 4348c9d417STakashi Iwai }; 441da177e4SLinus Torvalds 4548c9d417STakashi Iwai struct snd_rawmidi_global_ops { 4648c9d417STakashi Iwai int (*dev_register) (struct snd_rawmidi * rmidi); 4748c9d417STakashi Iwai int (*dev_unregister) (struct snd_rawmidi * rmidi); 48a7b928acSClemens Ladisch void (*get_port_info)(struct snd_rawmidi *rmidi, int number, 49a7b928acSClemens Ladisch struct snd_seq_port_info *info); 5048c9d417STakashi Iwai }; 511da177e4SLinus Torvalds 5248c9d417STakashi Iwai struct snd_rawmidi_runtime { 53b3c705aaSTakashi Iwai struct snd_rawmidi_substream *substream; 541da177e4SLinus Torvalds unsigned int drain: 1, /* drain stage */ 551da177e4SLinus Torvalds oss: 1; /* OSS compatible mode */ 561da177e4SLinus Torvalds /* midi stream buffer */ 571da177e4SLinus Torvalds unsigned char *buffer; /* buffer for MIDI data */ 581da177e4SLinus Torvalds size_t buffer_size; /* size of buffer */ 591da177e4SLinus Torvalds size_t appl_ptr; /* application pointer */ 601da177e4SLinus Torvalds size_t hw_ptr; /* hardware pointer */ 611da177e4SLinus Torvalds size_t avail_min; /* min avail for wakeup */ 621da177e4SLinus Torvalds size_t avail; /* max used buffer for wakeup */ 631da177e4SLinus Torvalds size_t xruns; /* over/underruns counter */ 641da177e4SLinus Torvalds /* misc */ 651da177e4SLinus Torvalds spinlock_t lock; 661da177e4SLinus Torvalds wait_queue_head_t sleep; 671da177e4SLinus Torvalds /* event handler (new bytes, input only) */ 6848c9d417STakashi Iwai void (*event)(struct snd_rawmidi_substream *substream); 691da177e4SLinus Torvalds /* defers calls to event [input] or ops->trigger [output] */ 70b3c705aaSTakashi Iwai struct work_struct event_work; 711da177e4SLinus Torvalds /* private data */ 721da177e4SLinus Torvalds void *private_data; 7348c9d417STakashi Iwai void (*private_free)(struct snd_rawmidi_substream *substream); 741da177e4SLinus Torvalds }; 751da177e4SLinus Torvalds 7648c9d417STakashi Iwai struct snd_rawmidi_substream { 771da177e4SLinus Torvalds struct list_head list; /* list of all substream for given stream */ 781da177e4SLinus Torvalds int stream; /* direction */ 791da177e4SLinus Torvalds int number; /* substream number */ 801da177e4SLinus Torvalds unsigned int opened: 1, /* open flag */ 811da177e4SLinus Torvalds append: 1, /* append flag (merge more streams) */ 821da177e4SLinus Torvalds active_sensing: 1; /* send active sensing when close */ 831da177e4SLinus Torvalds int use_count; /* use counter (for output) */ 841da177e4SLinus Torvalds size_t bytes; 8548c9d417STakashi Iwai struct snd_rawmidi *rmidi; 8648c9d417STakashi Iwai struct snd_rawmidi_str *pstr; 871da177e4SLinus Torvalds char name[32]; 8848c9d417STakashi Iwai struct snd_rawmidi_runtime *runtime; 897584af10SClemens Ladisch struct pid *pid; 901da177e4SLinus Torvalds /* hardware layer */ 916ba79b85STakashi Iwai const struct snd_rawmidi_ops *ops; 921da177e4SLinus Torvalds }; 931da177e4SLinus Torvalds 9448c9d417STakashi Iwai struct snd_rawmidi_file { 9548c9d417STakashi Iwai struct snd_rawmidi *rmidi; 9648c9d417STakashi Iwai struct snd_rawmidi_substream *input; 9748c9d417STakashi Iwai struct snd_rawmidi_substream *output; 9848c9d417STakashi Iwai }; 991da177e4SLinus Torvalds 10048c9d417STakashi Iwai struct snd_rawmidi_str { 1011da177e4SLinus Torvalds unsigned int substream_count; 1021da177e4SLinus Torvalds unsigned int substream_opened; 1031da177e4SLinus Torvalds struct list_head substreams; 1041da177e4SLinus Torvalds }; 1051da177e4SLinus Torvalds 10648c9d417STakashi Iwai struct snd_rawmidi { 10748c9d417STakashi Iwai struct snd_card *card; 108f87135f5SClemens Ladisch struct list_head list; 1091da177e4SLinus Torvalds unsigned int device; /* device number */ 1101da177e4SLinus Torvalds unsigned int info_flags; /* SNDRV_RAWMIDI_INFO_XXXX */ 1111da177e4SLinus Torvalds char id[64]; 1121da177e4SLinus Torvalds char name[80]; 1131da177e4SLinus Torvalds 1141da177e4SLinus Torvalds #ifdef CONFIG_SND_OSSEMUL 1151da177e4SLinus Torvalds int ossreg; 1161da177e4SLinus Torvalds #endif 1171da177e4SLinus Torvalds 118efdbe3c3SJulia Lawall const struct snd_rawmidi_global_ops *ops; 1191da177e4SLinus Torvalds 12048c9d417STakashi Iwai struct snd_rawmidi_str streams[2]; 1211da177e4SLinus Torvalds 1221da177e4SLinus Torvalds void *private_data; 12348c9d417STakashi Iwai void (*private_free) (struct snd_rawmidi *rmidi); 1241da177e4SLinus Torvalds 1251a60d4c5SIngo Molnar struct mutex open_mutex; 1261da177e4SLinus Torvalds wait_queue_head_t open_wait; 1271da177e4SLinus Torvalds 128aee5012fSTakashi Iwai struct device dev; 129aee5012fSTakashi Iwai 13048c9d417STakashi Iwai struct snd_info_entry *proc_entry; 1311da177e4SLinus Torvalds 1326d2412b8STakashi Iwai #if IS_ENABLED(CONFIG_SND_SEQUENCER) 13348c9d417STakashi Iwai struct snd_seq_device *seq_dev; 1341da177e4SLinus Torvalds #endif 1351da177e4SLinus Torvalds }; 1361da177e4SLinus Torvalds 1371da177e4SLinus Torvalds /* main rawmidi functions */ 1381da177e4SLinus Torvalds 13948c9d417STakashi Iwai int snd_rawmidi_new(struct snd_card *card, char *id, int device, 1401da177e4SLinus Torvalds int output_count, int input_count, 14148c9d417STakashi Iwai struct snd_rawmidi **rmidi); 14248c9d417STakashi Iwai void snd_rawmidi_set_ops(struct snd_rawmidi *rmidi, int stream, 1436ba79b85STakashi Iwai const struct snd_rawmidi_ops *ops); 1441da177e4SLinus Torvalds 1451da177e4SLinus Torvalds /* callbacks */ 1461da177e4SLinus Torvalds 14748c9d417STakashi Iwai int snd_rawmidi_receive(struct snd_rawmidi_substream *substream, 14848c9d417STakashi Iwai const unsigned char *buffer, int count); 14948c9d417STakashi Iwai int snd_rawmidi_transmit_empty(struct snd_rawmidi_substream *substream); 15048c9d417STakashi Iwai int snd_rawmidi_transmit_peek(struct snd_rawmidi_substream *substream, 15148c9d417STakashi Iwai unsigned char *buffer, int count); 15248c9d417STakashi Iwai int snd_rawmidi_transmit_ack(struct snd_rawmidi_substream *substream, int count); 15348c9d417STakashi Iwai int snd_rawmidi_transmit(struct snd_rawmidi_substream *substream, 15448c9d417STakashi Iwai unsigned char *buffer, int count); 15506ab3003STakashi Iwai int __snd_rawmidi_transmit_peek(struct snd_rawmidi_substream *substream, 15606ab3003STakashi Iwai unsigned char *buffer, int count); 15706ab3003STakashi Iwai int __snd_rawmidi_transmit_ack(struct snd_rawmidi_substream *substream, 15806ab3003STakashi Iwai int count); 1596aea5702STakashi Iwai int snd_rawmidi_proceed(struct snd_rawmidi_substream *substream); 1601da177e4SLinus Torvalds 1611da177e4SLinus Torvalds /* main midi functions */ 1621da177e4SLinus Torvalds 16348c9d417STakashi Iwai int snd_rawmidi_info_select(struct snd_card *card, struct snd_rawmidi_info *info); 164f87135f5SClemens Ladisch int snd_rawmidi_kernel_open(struct snd_card *card, int device, int subdevice, 165f87135f5SClemens Ladisch int mode, struct snd_rawmidi_file *rfile); 16648c9d417STakashi Iwai int snd_rawmidi_kernel_release(struct snd_rawmidi_file *rfile); 16748c9d417STakashi Iwai int snd_rawmidi_output_params(struct snd_rawmidi_substream *substream, 16848c9d417STakashi Iwai struct snd_rawmidi_params *params); 16948c9d417STakashi Iwai int snd_rawmidi_input_params(struct snd_rawmidi_substream *substream, 17048c9d417STakashi Iwai struct snd_rawmidi_params *params); 17148c9d417STakashi Iwai int snd_rawmidi_drop_output(struct snd_rawmidi_substream *substream); 17248c9d417STakashi Iwai int snd_rawmidi_drain_output(struct snd_rawmidi_substream *substream); 17348c9d417STakashi Iwai int snd_rawmidi_drain_input(struct snd_rawmidi_substream *substream); 17448c9d417STakashi Iwai long snd_rawmidi_kernel_read(struct snd_rawmidi_substream *substream, 17548c9d417STakashi Iwai unsigned char *buf, long count); 17648c9d417STakashi Iwai long snd_rawmidi_kernel_write(struct snd_rawmidi_substream *substream, 17748c9d417STakashi Iwai const unsigned char *buf, long count); 1781da177e4SLinus Torvalds 1791da177e4SLinus Torvalds #endif /* __SOUND_RAWMIDI_H */ 180