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67 lines
1.9 KiB
67 lines
1.9 KiB
/* SPDX-License-Identifier: GPL-2.0-or-later */ |
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#ifndef __SOUND_HWDEP_H |
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#define __SOUND_HWDEP_H |
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/* |
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* Hardware dependent layer |
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* Copyright (c) by Jaroslav Kysela <[email protected]> |
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*/ |
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#include <sound/asound.h> |
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#include <linux/poll.h> |
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struct snd_hwdep; |
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/* hwdep file ops; all ops can be NULL */ |
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struct snd_hwdep_ops { |
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long long (*llseek)(struct snd_hwdep *hw, struct file *file, |
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long long offset, int orig); |
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long (*read)(struct snd_hwdep *hw, char __user *buf, |
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long count, loff_t *offset); |
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long (*write)(struct snd_hwdep *hw, const char __user *buf, |
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long count, loff_t *offset); |
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int (*open)(struct snd_hwdep *hw, struct file * file); |
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int (*release)(struct snd_hwdep *hw, struct file * file); |
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__poll_t (*poll)(struct snd_hwdep *hw, struct file *file, |
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poll_table *wait); |
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int (*ioctl)(struct snd_hwdep *hw, struct file *file, |
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unsigned int cmd, unsigned long arg); |
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int (*ioctl_compat)(struct snd_hwdep *hw, struct file *file, |
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unsigned int cmd, unsigned long arg); |
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int (*mmap)(struct snd_hwdep *hw, struct file *file, |
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struct vm_area_struct *vma); |
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int (*dsp_status)(struct snd_hwdep *hw, |
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struct snd_hwdep_dsp_status *status); |
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int (*dsp_load)(struct snd_hwdep *hw, |
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struct snd_hwdep_dsp_image *image); |
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}; |
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struct snd_hwdep { |
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struct snd_card *card; |
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struct list_head list; |
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int device; |
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char id[32]; |
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char name[80]; |
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int iface; |
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#ifdef CONFIG_SND_OSSEMUL |
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int oss_type; |
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int ossreg; |
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#endif |
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struct snd_hwdep_ops ops; |
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wait_queue_head_t open_wait; |
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void *private_data; |
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void (*private_free) (struct snd_hwdep *hwdep); |
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struct device dev; |
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struct mutex open_mutex; |
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int used; /* reference counter */ |
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unsigned int dsp_loaded; /* bit fields of loaded dsp indices */ |
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unsigned int exclusive:1; /* exclusive access mode */ |
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}; |
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extern int snd_hwdep_new(struct snd_card *card, char *id, int device, |
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struct snd_hwdep **rhwdep); |
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#endif /* __SOUND_HWDEP_H */
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