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 46 struct snd_rawmidi; 47 struct snd_rawmidi_substream; 48 struct snd_seq_port_info; 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 void (*get_port_info)(struct snd_rawmidi *rmidi, int number, 61 struct snd_seq_port_info *info); 62 }; 63 64 struct snd_rawmidi_runtime { 65 unsigned int drain: 1, /* drain stage */ 66 oss: 1; /* OSS compatible mode */ 67 /* midi stream buffer */ 68 unsigned char *buffer; /* buffer for MIDI data */ 69 size_t buffer_size; /* size of buffer */ 70 size_t appl_ptr; /* application pointer */ 71 size_t hw_ptr; /* hardware pointer */ 72 size_t avail_min; /* min avail for wakeup */ 73 size_t avail; /* max used buffer for wakeup */ 74 size_t xruns; /* over/underruns counter */ 75 /* misc */ 76 spinlock_t lock; 77 wait_queue_head_t sleep; 78 /* event handler (new bytes, input only) */ 79 void (*event)(struct snd_rawmidi_substream *substream); 80 /* defers calls to event [input] or ops->trigger [output] */ 81 struct tasklet_struct tasklet; 82 /* private data */ 83 void *private_data; 84 void (*private_free)(struct snd_rawmidi_substream *substream); 85 }; 86 87 struct snd_rawmidi_substream { 88 struct list_head list; /* list of all substream for given stream */ 89 int stream; /* direction */ 90 int number; /* substream number */ 91 unsigned int opened: 1, /* open flag */ 92 append: 1, /* append flag (merge more streams) */ 93 active_sensing: 1; /* send active sensing when close */ 94 int use_count; /* use counter (for output) */ 95 size_t bytes; 96 struct snd_rawmidi *rmidi; 97 struct snd_rawmidi_str *pstr; 98 char name[32]; 99 struct snd_rawmidi_runtime *runtime; 100 /* hardware layer */ 101 struct snd_rawmidi_ops *ops; 102 }; 103 104 struct snd_rawmidi_file { 105 struct snd_rawmidi *rmidi; 106 struct snd_rawmidi_substream *input; 107 struct snd_rawmidi_substream *output; 108 }; 109 110 struct snd_rawmidi_str { 111 unsigned int substream_count; 112 unsigned int substream_opened; 113 struct list_head substreams; 114 }; 115 116 struct snd_rawmidi { 117 struct snd_card *card; 118 struct list_head list; 119 unsigned int device; /* device number */ 120 unsigned int info_flags; /* SNDRV_RAWMIDI_INFO_XXXX */ 121 char id[64]; 122 char name[80]; 123 124 #ifdef CONFIG_SND_OSSEMUL 125 int ossreg; 126 #endif 127 128 struct snd_rawmidi_global_ops *ops; 129 130 struct snd_rawmidi_str streams[2]; 131 132 void *private_data; 133 void (*private_free) (struct snd_rawmidi *rmidi); 134 135 struct mutex open_mutex; 136 wait_queue_head_t open_wait; 137 138 struct snd_info_entry *dev; 139 struct snd_info_entry *proc_entry; 140 141 #if defined(CONFIG_SND_SEQUENCER) || defined(CONFIG_SND_SEQUENCER_MODULE) 142 struct snd_seq_device *seq_dev; 143 #endif 144 }; 145 146 /* main rawmidi functions */ 147 148 int snd_rawmidi_new(struct snd_card *card, char *id, int device, 149 int output_count, int input_count, 150 struct snd_rawmidi **rmidi); 151 void snd_rawmidi_set_ops(struct snd_rawmidi *rmidi, int stream, 152 struct snd_rawmidi_ops *ops); 153 154 /* callbacks */ 155 156 void snd_rawmidi_receive_reset(struct snd_rawmidi_substream *substream); 157 int snd_rawmidi_receive(struct snd_rawmidi_substream *substream, 158 const unsigned char *buffer, int count); 159 void snd_rawmidi_transmit_reset(struct snd_rawmidi_substream *substream); 160 int snd_rawmidi_transmit_empty(struct snd_rawmidi_substream *substream); 161 int snd_rawmidi_transmit_peek(struct snd_rawmidi_substream *substream, 162 unsigned char *buffer, int count); 163 int snd_rawmidi_transmit_ack(struct snd_rawmidi_substream *substream, int count); 164 int snd_rawmidi_transmit(struct snd_rawmidi_substream *substream, 165 unsigned char *buffer, int count); 166 167 /* main midi functions */ 168 169 int snd_rawmidi_info_select(struct snd_card *card, struct snd_rawmidi_info *info); 170 int snd_rawmidi_kernel_open(struct snd_card *card, int device, int subdevice, 171 int mode, struct snd_rawmidi_file *rfile); 172 int snd_rawmidi_kernel_release(struct snd_rawmidi_file *rfile); 173 int snd_rawmidi_output_params(struct snd_rawmidi_substream *substream, 174 struct snd_rawmidi_params *params); 175 int snd_rawmidi_input_params(struct snd_rawmidi_substream *substream, 176 struct snd_rawmidi_params *params); 177 int snd_rawmidi_drop_output(struct snd_rawmidi_substream *substream); 178 int snd_rawmidi_drain_output(struct snd_rawmidi_substream *substream); 179 int snd_rawmidi_drain_input(struct snd_rawmidi_substream *substream); 180 long snd_rawmidi_kernel_read(struct snd_rawmidi_substream *substream, 181 unsigned char *buf, long count); 182 long snd_rawmidi_kernel_write(struct snd_rawmidi_substream *substream, 183 const unsigned char *buf, long count); 184 185 #endif /* __SOUND_RAWMIDI_H */ 186