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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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