1#ifndef __SOUND_RAWMIDI_H 2#define __SOUND_RAWMIDI_H 3 4/* 5 * Abstract layer for MIDI v1.0 stream 6 * Copyright (c) by Jaroslav Kysela <perex@perex.cz> 7 * 8 * 9 * This program is free software; you can redistribute it and/or modify 10 * it under the terms of the GNU General Public License as published by 11 * the Free Software Foundation; either version 2 of the License, or 12 * (at your option) any later version. 13 * 14 * This program is distributed in the hope that it will be useful, 15 * but WITHOUT ANY WARRANTY; without even the implied warranty of 16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 17 * GNU General Public License for more details. 18 * 19 * You should have received a copy of the GNU General Public License 20 * along with this program; if not, write to the Free Software 21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 22 * 23 */ 24 25#include <sound/asound.h> 26#include <linux/interrupt.h> 27#include <linux/spinlock.h> 28#include <linux/wait.h> 29#include <linux/mutex.h> 30 31#if defined(CONFIG_SND_SEQUENCER) || defined(CONFIG_SND_SEQUENCER_MODULE) 32#include "seq_device.h" 33#endif 34 35/* 36 * Raw MIDI interface 37 */ 38 39#define SNDRV_RAWMIDI_DEVICES 8 40 41#define SNDRV_RAWMIDI_LFLG_OUTPUT (1<<0) 42#define SNDRV_RAWMIDI_LFLG_INPUT (1<<1) 43#define SNDRV_RAWMIDI_LFLG_OPEN (3<<0) 44#define SNDRV_RAWMIDI_LFLG_APPEND (1<<2) 45 46struct snd_rawmidi; 47struct snd_rawmidi_substream; 48struct snd_seq_port_info; 49struct pid; 50 51struct snd_rawmidi_ops { 52 int (*open) (struct snd_rawmidi_substream * substream); 53 int (*close) (struct snd_rawmidi_substream * substream); 54 void (*trigger) (struct snd_rawmidi_substream * substream, int up); 55 void (*drain) (struct snd_rawmidi_substream * substream); 56}; 57 58struct snd_rawmidi_global_ops { 59 int (*dev_register) (struct snd_rawmidi * rmidi); 60 int (*dev_unregister) (struct snd_rawmidi * rmidi); 61 void (*get_port_info)(struct snd_rawmidi *rmidi, int number, 62 struct snd_seq_port_info *info); 63}; 64 65struct snd_rawmidi_runtime { 66 unsigned int drain: 1, /* drain stage */ 67 oss: 1; /* OSS compatible mode */ 68 /* midi stream buffer */ 69 unsigned char *buffer; /* buffer for MIDI data */ 70 size_t buffer_size; /* size of buffer */ 71 size_t appl_ptr; /* application pointer */ 72 size_t hw_ptr; /* hardware pointer */ 73 size_t avail_min; /* min avail for wakeup */ 74 size_t avail; /* max used buffer for wakeup */ 75 size_t xruns; /* over/underruns counter */ 76 /* misc */ 77 spinlock_t lock; 78 wait_queue_head_t sleep; 79 /* event handler (new bytes, input only) */ 80 void (*event)(struct snd_rawmidi_substream *substream); 81 /* defers calls to event [input] or ops->trigger [output] */ 82 struct tasklet_struct tasklet; 83 /* private data */ 84 void *private_data; 85 void (*private_free)(struct snd_rawmidi_substream *substream); 86}; 87 88struct snd_rawmidi_substream { 89 struct list_head list; /* list of all substream for given stream */ 90 int stream; /* direction */ 91 int number; /* substream number */ 92 unsigned int opened: 1, /* open flag */ 93 append: 1, /* append flag (merge more streams) */ 94 active_sensing: 1; /* send active sensing when close */ 95 int use_count; /* use counter (for output) */ 96 size_t bytes; 97 struct snd_rawmidi *rmidi; 98 struct snd_rawmidi_str *pstr; 99 char name[32]; 100 struct snd_rawmidi_runtime *runtime; 101 struct pid *pid; 102 /* hardware layer */ 103 struct snd_rawmidi_ops *ops; 104}; 105 106struct snd_rawmidi_file { 107 struct snd_rawmidi *rmidi; 108 struct snd_rawmidi_substream *input; 109 struct snd_rawmidi_substream *output; 110}; 111 112struct snd_rawmidi_str { 113 unsigned int substream_count; 114 unsigned int substream_opened; 115 struct list_head substreams; 116}; 117 118struct snd_rawmidi { 119 struct snd_card *card; 120 struct list_head list; 121 unsigned int device; /* device number */ 122 unsigned int info_flags; /* SNDRV_RAWMIDI_INFO_XXXX */ 123 char id[64]; 124 char name[80]; 125 126#ifdef CONFIG_SND_OSSEMUL 127 int ossreg; 128#endif 129 130 struct snd_rawmidi_global_ops *ops; 131 132 struct snd_rawmidi_str streams[2]; 133 134 void *private_data; 135 void (*private_free) (struct snd_rawmidi *rmidi); 136 137 struct mutex open_mutex; 138 wait_queue_head_t open_wait; 139 140 struct snd_info_entry *dev; 141 struct snd_info_entry *proc_entry; 142 143#if defined(CONFIG_SND_SEQUENCER) || defined(CONFIG_SND_SEQUENCER_MODULE) 144 struct snd_seq_device *seq_dev; 145#endif 146}; 147 148/* main rawmidi functions */ 149 150int snd_rawmidi_new(struct snd_card *card, char *id, int device, 151 int output_count, int input_count, 152 struct snd_rawmidi **rmidi); 153void snd_rawmidi_set_ops(struct snd_rawmidi *rmidi, int stream, 154 struct snd_rawmidi_ops *ops); 155 156/* callbacks */ 157 158void snd_rawmidi_receive_reset(struct snd_rawmidi_substream *substream); 159int snd_rawmidi_receive(struct snd_rawmidi_substream *substream, 160 const unsigned char *buffer, int count); 161void snd_rawmidi_transmit_reset(struct snd_rawmidi_substream *substream); 162int snd_rawmidi_transmit_empty(struct snd_rawmidi_substream *substream); 163int snd_rawmidi_transmit_peek(struct snd_rawmidi_substream *substream, 164 unsigned char *buffer, int count); 165int snd_rawmidi_transmit_ack(struct snd_rawmidi_substream *substream, int count); 166int snd_rawmidi_transmit(struct snd_rawmidi_substream *substream, 167 unsigned char *buffer, int count); 168 169/* main midi functions */ 170 171int snd_rawmidi_info_select(struct snd_card *card, struct snd_rawmidi_info *info); 172int snd_rawmidi_kernel_open(struct snd_card *card, int device, int subdevice, 173 int mode, struct snd_rawmidi_file *rfile); 174int snd_rawmidi_kernel_release(struct snd_rawmidi_file *rfile); 175int snd_rawmidi_output_params(struct snd_rawmidi_substream *substream, 176 struct snd_rawmidi_params *params); 177int snd_rawmidi_input_params(struct snd_rawmidi_substream *substream, 178 struct snd_rawmidi_params *params); 179int snd_rawmidi_drop_output(struct snd_rawmidi_substream *substream); 180int snd_rawmidi_drain_output(struct snd_rawmidi_substream *substream); 181int snd_rawmidi_drain_input(struct snd_rawmidi_substream *substream); 182long snd_rawmidi_kernel_read(struct snd_rawmidi_substream *substream, 183 unsigned char *buf, long count); 184long snd_rawmidi_kernel_write(struct snd_rawmidi_substream *substream, 185 const unsigned char *buf, long count); 186 187#endif /* __SOUND_RAWMIDI_H */ 188