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@suse.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 #define SNDRV_RAWMIDI_LFLG_NOOPENLOCK (1<<3) 46 47 struct snd_rawmidi; 48 struct snd_rawmidi_substream; 49 50 struct snd_rawmidi_ops { 51 int (*open) (struct snd_rawmidi_substream * substream); 52 int (*close) (struct snd_rawmidi_substream * substream); 53 void (*trigger) (struct snd_rawmidi_substream * substream, int up); 54 void (*drain) (struct snd_rawmidi_substream * substream); 55 }; 56 57 struct snd_rawmidi_global_ops { 58 int (*dev_register) (struct snd_rawmidi * rmidi); 59 int (*dev_unregister) (struct snd_rawmidi * rmidi); 60 }; 61 62 struct snd_rawmidi_runtime { 63 unsigned int drain: 1, /* drain stage */ 64 oss: 1; /* OSS compatible mode */ 65 /* midi stream buffer */ 66 unsigned char *buffer; /* buffer for MIDI data */ 67 size_t buffer_size; /* size of buffer */ 68 size_t appl_ptr; /* application pointer */ 69 size_t hw_ptr; /* hardware pointer */ 70 size_t avail_min; /* min avail for wakeup */ 71 size_t avail; /* max used buffer for wakeup */ 72 size_t xruns; /* over/underruns counter */ 73 /* misc */ 74 spinlock_t lock; 75 wait_queue_head_t sleep; 76 /* event handler (new bytes, input only) */ 77 void (*event)(struct snd_rawmidi_substream *substream); 78 /* defers calls to event [input] or ops->trigger [output] */ 79 struct tasklet_struct tasklet; 80 /* private data */ 81 void *private_data; 82 void (*private_free)(struct snd_rawmidi_substream *substream); 83 }; 84 85 struct snd_rawmidi_substream { 86 struct list_head list; /* list of all substream for given stream */ 87 int stream; /* direction */ 88 int number; /* substream number */ 89 unsigned int opened: 1, /* open flag */ 90 append: 1, /* append flag (merge more streams) */ 91 active_sensing: 1; /* send active sensing when close */ 92 int use_count; /* use counter (for output) */ 93 size_t bytes; 94 struct snd_rawmidi *rmidi; 95 struct snd_rawmidi_str *pstr; 96 char name[32]; 97 struct snd_rawmidi_runtime *runtime; 98 /* hardware layer */ 99 struct snd_rawmidi_ops *ops; 100 }; 101 102 struct snd_rawmidi_file { 103 struct snd_rawmidi *rmidi; 104 struct snd_rawmidi_substream *input; 105 struct snd_rawmidi_substream *output; 106 }; 107 108 struct snd_rawmidi_str { 109 unsigned int substream_count; 110 unsigned int substream_opened; 111 struct list_head substreams; 112 }; 113 114 struct snd_rawmidi { 115 struct snd_card *card; 116 struct list_head list; 117 unsigned int device; /* device number */ 118 unsigned int info_flags; /* SNDRV_RAWMIDI_INFO_XXXX */ 119 char id[64]; 120 char name[80]; 121 122 #ifdef CONFIG_SND_OSSEMUL 123 int ossreg; 124 #endif 125 126 struct snd_rawmidi_global_ops *ops; 127 128 struct snd_rawmidi_str streams[2]; 129 130 void *private_data; 131 void (*private_free) (struct snd_rawmidi *rmidi); 132 133 struct mutex open_mutex; 134 wait_queue_head_t open_wait; 135 136 struct snd_info_entry *dev; 137 struct snd_info_entry *proc_entry; 138 139 #if defined(CONFIG_SND_SEQUENCER) || defined(CONFIG_SND_SEQUENCER_MODULE) 140 struct snd_seq_device *seq_dev; 141 #endif 142 }; 143 144 /* main rawmidi functions */ 145 146 int snd_rawmidi_new(struct snd_card *card, char *id, int device, 147 int output_count, int input_count, 148 struct snd_rawmidi **rmidi); 149 void snd_rawmidi_set_ops(struct snd_rawmidi *rmidi, int stream, 150 struct snd_rawmidi_ops *ops); 151 152 /* callbacks */ 153 154 void snd_rawmidi_receive_reset(struct snd_rawmidi_substream *substream); 155 int snd_rawmidi_receive(struct snd_rawmidi_substream *substream, 156 const unsigned char *buffer, int count); 157 void snd_rawmidi_transmit_reset(struct snd_rawmidi_substream *substream); 158 int snd_rawmidi_transmit_empty(struct snd_rawmidi_substream *substream); 159 int snd_rawmidi_transmit_peek(struct snd_rawmidi_substream *substream, 160 unsigned char *buffer, int count); 161 int snd_rawmidi_transmit_ack(struct snd_rawmidi_substream *substream, int count); 162 int snd_rawmidi_transmit(struct snd_rawmidi_substream *substream, 163 unsigned char *buffer, int count); 164 165 /* main midi functions */ 166 167 int snd_rawmidi_info_select(struct snd_card *card, struct snd_rawmidi_info *info); 168 int snd_rawmidi_kernel_open(struct snd_card *card, int device, int subdevice, 169 int mode, struct snd_rawmidi_file *rfile); 170 int snd_rawmidi_kernel_release(struct snd_rawmidi_file *rfile); 171 int snd_rawmidi_output_params(struct snd_rawmidi_substream *substream, 172 struct snd_rawmidi_params *params); 173 int snd_rawmidi_input_params(struct snd_rawmidi_substream *substream, 174 struct snd_rawmidi_params *params); 175 int snd_rawmidi_drop_output(struct snd_rawmidi_substream *substream); 176 int snd_rawmidi_drain_output(struct snd_rawmidi_substream *substream); 177 int snd_rawmidi_drain_input(struct snd_rawmidi_substream *substream); 178 long snd_rawmidi_kernel_read(struct snd_rawmidi_substream *substream, 179 unsigned char *buf, long count); 180 long snd_rawmidi_kernel_write(struct snd_rawmidi_substream *substream, 181 const unsigned char *buf, long count); 182 183 #endif /* __SOUND_RAWMIDI_H */ 184