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 <asm/semaphore.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 typedef enum sndrv_rawmidi_stream snd_rawmidi_stream_t; 40 typedef struct sndrv_rawmidi_info snd_rawmidi_info_t; 41 typedef struct sndrv_rawmidi_params snd_rawmidi_params_t; 42 typedef struct sndrv_rawmidi_status snd_rawmidi_status_t; 43 44 #define SNDRV_RAWMIDI_DEVICES 8 45 46 #define SNDRV_RAWMIDI_LFLG_OUTPUT (1<<0) 47 #define SNDRV_RAWMIDI_LFLG_INPUT (1<<1) 48 #define SNDRV_RAWMIDI_LFLG_OPEN (3<<0) 49 #define SNDRV_RAWMIDI_LFLG_APPEND (1<<2) 50 #define SNDRV_RAWMIDI_LFLG_NOOPENLOCK (1<<3) 51 52 typedef struct _snd_rawmidi_runtime snd_rawmidi_runtime_t; 53 typedef struct _snd_rawmidi_substream snd_rawmidi_substream_t; 54 typedef struct _snd_rawmidi_str snd_rawmidi_str_t; 55 56 typedef struct _snd_rawmidi_ops { 57 int (*open) (snd_rawmidi_substream_t * substream); 58 int (*close) (snd_rawmidi_substream_t * substream); 59 void (*trigger) (snd_rawmidi_substream_t * substream, int up); 60 void (*drain) (snd_rawmidi_substream_t * substream); 61 } snd_rawmidi_ops_t; 62 63 typedef struct _snd_rawmidi_global_ops { 64 int (*dev_register) (snd_rawmidi_t * rmidi); 65 int (*dev_unregister) (snd_rawmidi_t * rmidi); 66 } snd_rawmidi_global_ops_t; 67 68 struct _snd_rawmidi_runtime { 69 unsigned int drain: 1, /* drain stage */ 70 oss: 1; /* OSS compatible mode */ 71 /* midi stream buffer */ 72 unsigned char *buffer; /* buffer for MIDI data */ 73 size_t buffer_size; /* size of buffer */ 74 size_t appl_ptr; /* application pointer */ 75 size_t hw_ptr; /* hardware pointer */ 76 size_t avail_min; /* min avail for wakeup */ 77 size_t avail; /* max used buffer for wakeup */ 78 size_t xruns; /* over/underruns counter */ 79 /* misc */ 80 spinlock_t lock; 81 wait_queue_head_t sleep; 82 /* event handler (new bytes, input only) */ 83 void (*event)(snd_rawmidi_substream_t *substream); 84 /* defers calls to event [input] or ops->trigger [output] */ 85 struct tasklet_struct tasklet; 86 /* private data */ 87 void *private_data; 88 void (*private_free)(snd_rawmidi_substream_t *substream); 89 }; 90 91 struct _snd_rawmidi_substream { 92 struct list_head list; /* list of all substream for given stream */ 93 int stream; /* direction */ 94 int number; /* substream number */ 95 unsigned int opened: 1, /* open flag */ 96 append: 1, /* append flag (merge more streams) */ 97 active_sensing: 1; /* send active sensing when close */ 98 int use_count; /* use counter (for output) */ 99 size_t bytes; 100 snd_rawmidi_t *rmidi; 101 snd_rawmidi_str_t *pstr; 102 char name[32]; 103 snd_rawmidi_runtime_t *runtime; 104 /* hardware layer */ 105 snd_rawmidi_ops_t *ops; 106 }; 107 108 typedef struct _snd_rawmidi_file { 109 snd_rawmidi_t *rmidi; 110 snd_rawmidi_substream_t *input; 111 snd_rawmidi_substream_t *output; 112 } snd_rawmidi_file_t; 113 114 struct _snd_rawmidi_str { 115 unsigned int substream_count; 116 unsigned int substream_opened; 117 struct list_head substreams; 118 }; 119 120 struct _snd_rawmidi { 121 snd_card_t *card; 122 123 unsigned int device; /* device number */ 124 unsigned int info_flags; /* SNDRV_RAWMIDI_INFO_XXXX */ 125 char id[64]; 126 char name[80]; 127 128 #ifdef CONFIG_SND_OSSEMUL 129 int ossreg; 130 #endif 131 132 snd_rawmidi_global_ops_t *ops; 133 134 snd_rawmidi_str_t streams[2]; 135 136 void *private_data; 137 void (*private_free) (snd_rawmidi_t *rmidi); 138 139 struct semaphore open_mutex; 140 wait_queue_head_t open_wait; 141 142 snd_info_entry_t *dev; 143 snd_info_entry_t *proc_entry; 144 145 #if defined(CONFIG_SND_SEQUENCER) || defined(CONFIG_SND_SEQUENCER_MODULE) 146 snd_seq_device_t *seq_dev; 147 #endif 148 }; 149 150 /* main rawmidi functions */ 151 152 int snd_rawmidi_new(snd_card_t * card, char *id, int device, 153 int output_count, int input_count, 154 snd_rawmidi_t ** rmidi); 155 void snd_rawmidi_set_ops(snd_rawmidi_t * rmidi, int stream, snd_rawmidi_ops_t * ops); 156 157 /* callbacks */ 158 159 void snd_rawmidi_receive_reset(snd_rawmidi_substream_t * substream); 160 int snd_rawmidi_receive(snd_rawmidi_substream_t * substream, const unsigned char *buffer, int count); 161 void snd_rawmidi_transmit_reset(snd_rawmidi_substream_t * substream); 162 int snd_rawmidi_transmit_empty(snd_rawmidi_substream_t * substream); 163 int snd_rawmidi_transmit_peek(snd_rawmidi_substream_t * substream, unsigned char *buffer, int count); 164 int snd_rawmidi_transmit_ack(snd_rawmidi_substream_t * substream, int count); 165 int snd_rawmidi_transmit(snd_rawmidi_substream_t * substream, unsigned char *buffer, int count); 166 167 /* main midi functions */ 168 169 int snd_rawmidi_info_select(snd_card_t *card, snd_rawmidi_info_t *info); 170 int snd_rawmidi_kernel_open(int cardnum, int device, int subdevice, int mode, snd_rawmidi_file_t * rfile); 171 int snd_rawmidi_kernel_release(snd_rawmidi_file_t * rfile); 172 int snd_rawmidi_output_params(snd_rawmidi_substream_t * substream, snd_rawmidi_params_t * params); 173 int snd_rawmidi_input_params(snd_rawmidi_substream_t * substream, snd_rawmidi_params_t * params); 174 int snd_rawmidi_drop_output(snd_rawmidi_substream_t * substream); 175 int snd_rawmidi_drain_output(snd_rawmidi_substream_t * substream); 176 int snd_rawmidi_drain_input(snd_rawmidi_substream_t * substream); 177 long snd_rawmidi_kernel_read(snd_rawmidi_substream_t * substream, unsigned char *buf, long count); 178 long snd_rawmidi_kernel_write(snd_rawmidi_substream_t * substream, const unsigned char *buf, long count); 179 180 #endif /* __SOUND_RAWMIDI_H */ 181