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