include/sound/hwdep.h

   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 */