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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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