71 lines
1.4 KiB
C
71 lines
1.4 KiB
C
|
// SPDX-License-Identifier: GPL-2.0
|
||
|
|
/* cavium_ptp.h - PTP 1588 clock on Cavium hardware
|
||
|
|
* Copyright (c) 2003-2015, 2017 Cavium, Inc.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#ifndef CAVIUM_PTP_H
|
||
|
|
#define CAVIUM_PTP_H
|
||
|
|
|
||
|
|
#include <linux/ptp_clock_kernel.h>
|
||
|
|
#include <linux/timecounter.h>
|
||
|
|
|
||
|
|
struct cavium_ptp {
|
||
|
|
struct pci_dev *pdev;
|
||
|
|
|
||
|
|
/* Serialize access to cycle_counter, time_counter and hw_registers */
|
||
|
|
spinlock_t spin_lock;
|
||
|
|
struct cyclecounter cycle_counter;
|
||
|
|
struct timecounter time_counter;
|
||
|
|
void __iomem *reg_base;
|
||
|
|
|
||
|
|
u32 clock_rate;
|
||
|
|
|
||
|
|
struct ptp_clock_info ptp_info;
|
||
|
|
struct ptp_clock *ptp_clock;
|
||
|
|
};
|
||
|
|
|
||
|
|
#if IS_ENABLED(CONFIG_CAVIUM_PTP)
|
||
|
|
|
||
|
|
struct cavium_ptp *cavium_ptp_get(void);
|
||
|
|
void cavium_ptp_put(struct cavium_ptp *ptp);
|
||
|
|
|
||
|
|
static inline u64 cavium_ptp_tstamp2time(struct cavium_ptp *ptp, u64 tstamp)
|
||
|
|
{
|
||
|
|
unsigned long flags;
|
||
|
|
u64 ret;
|
||
|
|
|
||
|
|
spin_lock_irqsave(&ptp->spin_lock, flags);
|
||
|
|
ret = timecounter_cyc2time(&ptp->time_counter, tstamp);
|
||
|
|
spin_unlock_irqrestore(&ptp->spin_lock, flags);
|
||
|
|
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline int cavium_ptp_clock_index(struct cavium_ptp *clock)
|
||
|
|
{
|
||
|
|
return ptp_clock_index(clock->ptp_clock);
|
||
|
|
}
|
||
|
|
|
||
|
|
#else
|
||
|
|
|
||
|
|
static inline struct cavium_ptp *cavium_ptp_get(void)
|
||
|
|
{
|
||
|
|
return ERR_PTR(-ENODEV);
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline void cavium_ptp_put(struct cavium_ptp *ptp) {}
|
||
|
|
|
||
|
|
static inline u64 cavium_ptp_tstamp2time(struct cavium_ptp *ptp, u64 tstamp)
|
||
|
|
{
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline int cavium_ptp_clock_index(struct cavium_ptp *clock)
|
||
|
|
{
|
||
|
|
return -1;
|
||
|
|
}
|
||
|
|
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#endif
|