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

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  1 #ifndef __SOUND_HWDEP_H
  2 #define __SOUND_HWDEP_H
  3 
  4 /*
  5  *  Hardware dependent layer 
  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/poll.h>
 27 
 28 struct snd_hwdep;
 29 
 30 /* hwdep file ops; all ops can be NULL */
 31 struct snd_hwdep_ops {
 32         long long (*llseek)(struct snd_hwdep *hw, struct file *file,
 33                             long long offset, int orig);
 34         long (*read)(struct snd_hwdep *hw, char __user *buf,
 35                      long count, loff_t *offset);
 36         long (*write)(struct snd_hwdep *hw, const char __user *buf,
 37                       long count, loff_t *offset);
 38         int (*open)(struct snd_hwdep *hw, struct file * file);
 39         int (*release)(struct snd_hwdep *hw, struct file * file);
 40         unsigned int (*poll)(struct snd_hwdep *hw, struct file *file,
 41                              poll_table *wait);
 42         int (*ioctl)(struct snd_hwdep *hw, struct file *file,
 43                      unsigned int cmd, unsigned long arg);
 44         int (*ioctl_compat)(struct snd_hwdep *hw, struct file *file,
 45                             unsigned int cmd, unsigned long arg);
 46         int (*mmap)(struct snd_hwdep *hw, struct file *file,
 47                     struct vm_area_struct *vma);
 48         int (*dsp_status)(struct snd_hwdep *hw,
 49                           struct snd_hwdep_dsp_status *status);
 50         int (*dsp_load)(struct snd_hwdep *hw,
 51                         struct snd_hwdep_dsp_image *image);
 52 };
 53 
 54 struct snd_hwdep {
 55         struct snd_card *card;
 56         struct list_head list;
 57         int device;
 58         char id[32];
 59         char name[80];
 60         int iface;
 61 
 62 #ifdef CONFIG_SND_OSSEMUL
 63         int oss_type;
 64         int ossreg;
 65 #endif
 66 
 67         struct snd_hwdep_ops ops;
 68         wait_queue_head_t open_wait;
 69         void *private_data;
 70         void (*private_free) (struct snd_hwdep *hwdep);
 71         struct device dev;
 72 
 73         struct mutex open_mutex;
 74         int used;                       /* reference counter */
 75         unsigned int dsp_loaded;        /* bit fields of loaded dsp indices */
 76         unsigned int exclusive:1;       /* exclusive access mode */
 77 };
 78 
 79 extern int snd_hwdep_new(struct snd_card *card, char *id, int device,
 80                          struct snd_hwdep **rhwdep);
 81 
 82 #endif /* __SOUND_HWDEP_H */
 83 

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