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@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/poll.h>
  27
  28 typedef enum sndrv_hwdep_iface snd_hwdep_iface_t;
  29 typedef struct sndrv_hwdep_info snd_hwdep_info_t;
  30 typedef struct sndrv_hwdep_dsp_status snd_hwdep_dsp_status_t;
  31 typedef struct sndrv_hwdep_dsp_image snd_hwdep_dsp_image_t;
  32
  33 typedef struct _snd_hwdep_ops {
  34         long long (*llseek) (snd_hwdep_t *hw, struct file * file, long long offset, int orig);
  35         long (*read) (snd_hwdep_t * hw, char __user *buf, long count, loff_t *offset);
  36         long (*write) (snd_hwdep_t * hw, const char __user *buf, long count, loff_t *offset);
  37         int (*open) (snd_hwdep_t * hw, struct file * file);
  38         int (*release) (snd_hwdep_t * hw, struct file * file);
  39         unsigned int (*poll) (snd_hwdep_t * hw, struct file * file, poll_table * wait);
  40         int (*ioctl) (snd_hwdep_t * hw, struct file * file, unsigned int cmd, unsigned long arg);
  41         int (*mmap) (snd_hwdep_t * hw, struct file * file, struct vm_area_struct * vma);
  42         int (*dsp_status) (snd_hwdep_t * hw, snd_hwdep_dsp_status_t * status);
  43         int (*dsp_load) (snd_hwdep_t * hw, snd_hwdep_dsp_image_t * image);
  44 } snd_hwdep_ops_t;
  45
  46 struct _snd_hwdep {
  47         snd_card_t *card;
  48         int device;
  49         char id[32];
  50         char name[80];
  51         int iface;
  52
  53 #ifdef CONFIG_SND_OSSEMUL
  54         char oss_dev[32];
  55         int oss_type;
  56         int ossreg;
  57 #endif
  58
  59         snd_hwdep_ops_t ops;
  60         wait_queue_head_t open_wait;
  61         void *private_data;
  62         void (*private_free) (snd_hwdep_t *hwdep);
  63
  64         struct semaphore open_mutex;
  65         int used;
  66         unsigned int dsp_loaded;
  67         unsigned int exclusive: 1;
  68 };
  69
  70 extern int snd_hwdep_new(snd_card_t * card, char *id, int device, snd_hwdep_t ** rhwdep);
  71
  72 #endif /* __SOUND_HWDEP_H */