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