include/sound/seq_device.h

   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 */