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Index of /FSS-OZR/root/sys/dev/char/4:31/subsystem/tty22
Index of /FSS-OZR/root/sys/dev/char/4:31/subsystem/tty22
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l _I|+ /* SPDX-License-Identifier: GPL-2.0-or-later */
#ifndef __SOUND_TIMER_H
#define __SOUND_TIMER_H
/*
* Timer abstract layer
* Copyright (c) by Jaroslav Kysela ,
* Abramo Bagnara
*/
#include
#include
#define snd_timer_chip(timer) ((timer)->private_data)
#define SNDRV_TIMER_DEVICES 16
#define SNDRV_TIMER_DEV_FLG_PCM 0x10000000
#define SNDRV_TIMER_HW_AUTO 0x00000001 /* auto trigger is supported */
#define SNDRV_TIMER_HW_STOP 0x00000002 /* call stop before start */
#define SNDRV_TIMER_HW_SLAVE 0x00000004 /* only slave timer (variable resolution) */
#define SNDRV_TIMER_HW_FIRST 0x00000008 /* first tick can be incomplete */
#define SNDRV_TIMER_HW_WORK 0x00000010 /* timer is called from work */
#define SNDRV_TIMER_IFLG_SLAVE 0x00000001
#define SNDRV_TIMER_IFLG_RUNNING 0x00000002
#define SNDRV_TIMER_IFLG_START 0x00000004
#define SNDRV_TIMER_IFLG_AUTO 0x00000008 /* auto restart */
#define SNDRV_TIMER_IFLG_FAST 0x00000010 /* fast callback (do not use work) */
#define SNDRV_TIMER_IFLG_CALLBACK 0x00000020 /* timer callback is active */
#define SNDRV_TIMER_IFLG_EXCLUSIVE 0x00000040 /* exclusive owner - no more instances */
#define SNDRV_TIMER_IFLG_EARLY_EVENT 0x00000080 /* write early event to the poll queue */
#define SNDRV_TIMER_FLG_CHANGE 0x00000001
#define SNDRV_TIMER_FLG_RESCHED 0x00000002 /* need reschedule */
struct snd_timer;
struct snd_timer_hardware {
/* -- must be filled with low-level driver */
unsigned int flags; /* various flags */
unsigned long resolution; /* average timer resolution for one tick in nsec */
unsigned long resolution_min; /* minimal resolution */
unsigned long resolution_max; /* maximal resolution */
unsigned long ticks; /* max timer ticks per interrupt */
/* -- low-level functions -- */
int (*open) (struct snd_timer * timer);
int (*close) (struct snd_timer * timer);
unsigned long (*c_resolution) (struct snd_timer * timer);
int (*start) (struct snd_timer * timer);
int (*stop) (struct snd_timer * timer);
int (*set_period) (struct snd_timer * timer, unsigned long period_num, unsigned long period_den);
int (*precise_resolution) (struct snd_timer * timer, unsigned long *num, unsigned long *den);
};
struct snd_timer {
int tmr_class;
struct snd_card *card;
struct module *module;
int tmr_device;
int tmr_subdevice;
char id[64];
char name[80];
unsigned int flags;
int running; /* running instances */
unsigned long sticks; /* schedule ticks */
void *private_data;