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

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  1 /* SPDX-License-Identifier: GPL-2.0-or-later */
  2 #ifndef __SOUND_HWDEP_H
  3 #define __SOUND_HWDEP_H
  4 
  5 /*
  6  *  Hardware dependent layer 
  7  *  Copyright (c) by Jaroslav Kysela <perex@perex.cz>
  8  */
  9 
 10 #include <sound/asound.h>
 11 #include <linux/poll.h>
 12 
 13 struct snd_hwdep;
 14 
 15 /* hwdep file ops; all ops can be NULL */
 16 struct snd_hwdep_ops {
 17         long long (*llseek)(struct snd_hwdep *hw, struct file *file,
 18                             long long offset, int orig);
 19         long (*read)(struct snd_hwdep *hw, char __user *buf,
 20                      long count, loff_t *offset);
 21         long (*write)(struct snd_hwdep *hw, const char __user *buf,
 22                       long count, loff_t *offset);
 23         int (*open)(struct snd_hwdep *hw, struct file * file);
 24         int (*release)(struct snd_hwdep *hw, struct file * file);
 25         __poll_t (*poll)(struct snd_hwdep *hw, struct file *file,
 26                              poll_table *wait);
 27         int (*ioctl)(struct snd_hwdep *hw, struct file *file,
 28                      unsigned int cmd, unsigned long arg);
 29         int (*ioctl_compat)(struct snd_hwdep *hw, struct file *file,
 30                             unsigned int cmd, unsigned long arg);
 31         int (*mmap)(struct snd_hwdep *hw, struct file *file,
 32                     struct vm_area_struct *vma);
 33         int (*dsp_status)(struct snd_hwdep *hw,
 34                           struct snd_hwdep_dsp_status *status);
 35         int (*dsp_load)(struct snd_hwdep *hw,
 36                         struct snd_hwdep_dsp_image *image);
 37 };
 38 
 39 struct snd_hwdep {
 40         struct snd_card *card;
 41         struct list_head list;
 42         int device;
 43         char id[32];
 44         char name[80];
 45         int iface;
 46 
 47 #ifdef CONFIG_SND_OSSEMUL
 48         int oss_type;
 49         int ossreg;
 50 #endif
 51 
 52         struct snd_hwdep_ops ops;
 53         wait_queue_head_t open_wait;
 54         void *private_data;
 55         void (*private_free) (struct snd_hwdep *hwdep);
 56         struct device dev;
 57 
 58         struct mutex open_mutex;
 59         int used;                       /* reference counter */
 60         unsigned int dsp_loaded;        /* bit fields of loaded dsp indices */
 61         unsigned int exclusive:1;       /* exclusive access mode */
 62 };
 63 
 64 extern int snd_hwdep_new(struct snd_card *card, char *id, int device,
 65                          struct snd_hwdep **rhwdep);
 66 
 67 #endif /* __SOUND_HWDEP_H */
 68 

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