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TOMOYO Linux Cross Reference
Linux/include/sound/seq_device.h

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  1 #ifndef __SOUND_SEQ_DEVICE_H
  2 #define __SOUND_SEQ_DEVICE_H
  3 
  4 /*
  5  *  ALSA sequencer device management
  6  *  Copyright (c) 1999 by Takashi Iwai <tiwai@suse.de>
  7  *
  8  *   This program is free software; you can redistribute it and/or modify
  9  *   it under the terms of the GNU General Public License as published by
 10  *   the Free Software Foundation; either version 2 of the License, or
 11  *   (at your option) any later version.
 12  *
 13  *   This program is distributed in the hope that it will be useful,
 14  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
 15  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 16  *   GNU General Public License for more details.
 17  *
 18  *   You should have received a copy of the GNU General Public License
 19  *   along with this program; if not, write to the Free Software
 20  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
 21  *
 22  */
 23 
 24 /*
 25  * registered device information
 26  */
 27 
 28 struct snd_seq_device {
 29         /* device info */
 30         struct snd_card *card;  /* sound card */
 31         int device;             /* device number */
 32         const char *id;         /* driver id */
 33         char name[80];          /* device name */
 34         int argsize;            /* size of the argument */
 35         void *driver_data;      /* private data for driver */
 36         void *private_data;     /* private data for the caller */
 37         void (*private_free)(struct snd_seq_device *device);
 38         struct device dev;
 39 };
 40 
 41 #define to_seq_dev(_dev) \
 42         container_of(_dev, struct snd_seq_device, dev)
 43 
 44 /* sequencer driver */
 45 
 46 /* driver operators
 47  * probe:
 48  *      Initialize the device with given parameters.
 49  *      Typically,
 50  *              1. call snd_hwdep_new
 51  *              2. allocate private data and initialize it
 52  *              3. call snd_hwdep_register
 53  *              4. store the instance to dev->driver_data pointer.
 54  *              
 55  * remove:
 56  *      Release the private data.
 57  *      Typically, call snd_device_free(dev->card, dev->driver_data)
 58  */
 59 struct snd_seq_driver {
 60         struct device_driver driver;
 61         char *id;
 62         int argsize;
 63 };
 64 
 65 #define to_seq_drv(_drv) \
 66         container_of(_drv, struct snd_seq_driver, driver)
 67 
 68 /*
 69  * prototypes
 70  */
 71 #ifdef CONFIG_MODULES
 72 void snd_seq_device_load_drivers(void);
 73 #else
 74 #define snd_seq_device_load_drivers()
 75 #endif
 76 int snd_seq_device_new(struct snd_card *card, int device, const char *id,
 77                        int argsize, struct snd_seq_device **result);
 78 
 79 #define SNDRV_SEQ_DEVICE_ARGPTR(dev) (void *)((char *)(dev) + sizeof(struct snd_seq_device))
 80 
 81 int __must_check __snd_seq_driver_register(struct snd_seq_driver *drv,
 82                                            struct module *mod);
 83 #define snd_seq_driver_register(drv) \
 84         __snd_seq_driver_register(drv, THIS_MODULE)
 85 void snd_seq_driver_unregister(struct snd_seq_driver *drv);
 86 
 87 #define module_snd_seq_driver(drv) \
 88         module_driver(drv, snd_seq_driver_register, snd_seq_driver_unregister)
 89 
 90 /*
 91  * id strings for generic devices
 92  */
 93 #define SNDRV_SEQ_DEV_ID_MIDISYNTH      "seq-midi"
 94 #define SNDRV_SEQ_DEV_ID_OPL3           "opl3-synth"
 95 
 96 #endif /* __SOUND_SEQ_DEVICE_H */
 97 

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