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Diffstat (limited to 'include/sound')
-rw-r--r--include/sound/hwdep.h38
1 files changed, 24 insertions, 14 deletions
diff --git a/include/sound/hwdep.h b/include/sound/hwdep.h
index d9eea013c753..8c05e47a4090 100644
--- a/include/sound/hwdep.h
+++ b/include/sound/hwdep.h
@@ -27,18 +27,28 @@
struct snd_hwdep;
+/* hwdep file ops; all ops can be NULL */
struct snd_hwdep_ops {
- long long (*llseek) (struct snd_hwdep *hw, struct file * file, long long offset, int orig);
- long (*read) (struct snd_hwdep *hw, char __user *buf, long count, loff_t *offset);
- long (*write) (struct snd_hwdep *hw, const char __user *buf, long count, loff_t *offset);
- int (*open) (struct snd_hwdep * hw, struct file * file);
- int (*release) (struct snd_hwdep *hw, struct file * file);
- unsigned int (*poll) (struct snd_hwdep *hw, struct file * file, poll_table * wait);
- int (*ioctl) (struct snd_hwdep *hw, struct file * file, unsigned int cmd, unsigned long arg);
- int (*ioctl_compat) (struct snd_hwdep *hw, struct file * file, unsigned int cmd, unsigned long arg);
- int (*mmap) (struct snd_hwdep *hw, struct file * file, struct vm_area_struct * vma);
- int (*dsp_status) (struct snd_hwdep *hw, struct snd_hwdep_dsp_status *status);
- int (*dsp_load) (struct snd_hwdep *hw, struct snd_hwdep_dsp_image *image);
+ long long (*llseek)(struct snd_hwdep *hw, struct file *file,
+ long long offset, int orig);
+ long (*read)(struct snd_hwdep *hw, char __user *buf,
+ long count, loff_t *offset);
+ long (*write)(struct snd_hwdep *hw, const char __user *buf,
+ long count, loff_t *offset);
+ int (*open)(struct snd_hwdep *hw, struct file * file);
+ int (*release)(struct snd_hwdep *hw, struct file * file);
+ unsigned int (*poll)(struct snd_hwdep *hw, struct file *file,
+ poll_table *wait);
+ int (*ioctl)(struct snd_hwdep *hw, struct file *file,
+ unsigned int cmd, unsigned long arg);
+ int (*ioctl_compat)(struct snd_hwdep *hw, struct file *file,
+ unsigned int cmd, unsigned long arg);
+ int (*mmap)(struct snd_hwdep *hw, struct file *file,
+ struct vm_area_struct *vma);
+ int (*dsp_status)(struct snd_hwdep *hw,
+ struct snd_hwdep_dsp_status *status);
+ int (*dsp_load)(struct snd_hwdep *hw,
+ struct snd_hwdep_dsp_image *image);
};
struct snd_hwdep {
@@ -61,9 +71,9 @@ struct snd_hwdep {
void (*private_free) (struct snd_hwdep *hwdep);
struct mutex open_mutex;
- int used;
- unsigned int dsp_loaded;
- unsigned int exclusive: 1;
+ int used; /* reference counter */
+ unsigned int dsp_loaded; /* bit fields of loaded dsp indices */
+ unsigned int exclusive:1; /* exclusive access mode */
};
extern int snd_hwdep_new(struct snd_card *card, char *id, int device,