93 lines
2.6 KiB
C
93 lines
2.6 KiB
C
|
/* SPDX-License-Identifier: GPL-2.0-or-later */
|
||
|
|
/*
|
||
|
|
* PTP 1588 clock support - private declarations for the core module.
|
||
|
|
*
|
||
|
|
* Copyright (C) 2010 OMICRON electronics GmbH
|
||
|
|
*/
|
||
|
|
#ifndef _PTP_PRIVATE_H_
|
||
|
|
#define _PTP_PRIVATE_H_
|
||
|
|
|
||
|
|
#include <linux/cdev.h>
|
||
|
|
#include <linux/device.h>
|
||
|
|
#include <linux/kthread.h>
|
||
|
|
#include <linux/mutex.h>
|
||
|
|
#include <linux/posix-clock.h>
|
||
|
|
#include <linux/ptp_clock.h>
|
||
|
|
#include <linux/ptp_clock_kernel.h>
|
||
|
|
#include <linux/time.h>
|
||
|
|
|
||
|
|
#define PTP_MAX_TIMESTAMPS 128
|
||
|
|
#define PTP_BUF_TIMESTAMPS 30
|
||
|
|
|
||
|
|
struct timestamp_event_queue {
|
||
|
|
struct ptp_extts_event buf[PTP_MAX_TIMESTAMPS];
|
||
|
|
int head;
|
||
|
|
int tail;
|
||
|
|
spinlock_t lock;
|
||
|
|
};
|
||
|
|
|
||
|
|
struct ptp_clock {
|
||
|
|
struct posix_clock clock;
|
||
|
|
struct device dev;
|
||
|
|
struct ptp_clock_info *info;
|
||
|
|
dev_t devid;
|
||
|
|
int index; /* index into clocks.map */
|
||
|
|
struct pps_device *pps_source;
|
||
|
|
long dialed_frequency; /* remembers the frequency adjustment */
|
||
|
|
struct timestamp_event_queue tsevq; /* simple fifo for time stamps */
|
||
|
|
struct mutex tsevq_mux; /* one process at a time reading the fifo */
|
||
|
|
struct mutex pincfg_mux; /* protect concurrent info->pin_config access */
|
||
|
|
wait_queue_head_t tsev_wq;
|
||
|
|
int defunct; /* tells readers to go away when clock is being removed */
|
||
|
|
struct device_attribute *pin_dev_attr;
|
||
|
|
struct attribute **pin_attr;
|
||
|
|
struct attribute_group pin_attr_group;
|
||
|
|
/* 1st entry is a pointer to the real group, 2nd is NULL terminator */
|
||
|
|
const struct attribute_group *pin_attr_groups[2];
|
||
|
|
struct kthread_worker *kworker;
|
||
|
|
struct kthread_delayed_work aux_work;
|
||
|
|
};
|
||
|
|
|
||
|
|
/*
|
||
|
|
* The function queue_cnt() is safe for readers to call without
|
||
|
|
* holding q->lock. Readers use this function to verify that the queue
|
||
|
|
* is nonempty before proceeding with a dequeue operation. The fact
|
||
|
|
* that a writer might concurrently increment the tail does not
|
||
|
|
* matter, since the queue remains nonempty nonetheless.
|
||
|
|
*/
|
||
|
|
static inline int queue_cnt(struct timestamp_event_queue *q)
|
||
|
|
{
|
||
|
|
int cnt = q->tail - q->head;
|
||
|
|
return cnt < 0 ? PTP_MAX_TIMESTAMPS + cnt : cnt;
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* see ptp_chardev.c
|
||
|
|
*/
|
||
|
|
|
||
|
|
/* caller must hold pincfg_mux */
|
||
|
|
int ptp_set_pinfunc(struct ptp_clock *ptp, unsigned int pin,
|
||
|
|
enum ptp_pin_function func, unsigned int chan);
|
||
|
|
|
||
|
|
long ptp_ioctl(struct posix_clock *pc,
|
||
|
|
unsigned int cmd, unsigned long arg);
|
||
|
|
|
||
|
|
int ptp_open(struct posix_clock *pc, fmode_t fmode);
|
||
|
|
|
||
|
|
ssize_t ptp_read(struct posix_clock *pc,
|
||
|
|
uint flags, char __user *buf, size_t cnt);
|
||
|
|
|
||
|
|
__poll_t ptp_poll(struct posix_clock *pc,
|
||
|
|
struct file *fp, poll_table *wait);
|
||
|
|
|
||
|
|
/*
|
||
|
|
* see ptp_sysfs.c
|
||
|
|
*/
|
||
|
|
|
||
|
|
extern const struct attribute_group *ptp_groups[];
|
||
|
|
|
||
|
|
int ptp_populate_pin_groups(struct ptp_clock *ptp);
|
||
|
|
void ptp_cleanup_pin_groups(struct ptp_clock *ptp);
|
||
|
|
|
||
|
|
#endif
|