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include/linux/pps_kernel.h
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/* * PPS API kernel header * * Copyright (C) 2009 Rodolfo Giometti <giometti@linux.it> * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ |
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#ifndef LINUX_PPS_KERNEL_H #define LINUX_PPS_KERNEL_H |
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#include <linux/pps.h> #include <linux/cdev.h> #include <linux/device.h> #include <linux/time.h> /* * Global defines */ |
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struct pps_device; |
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/* The specific PPS source info */ struct pps_source_info { char name[PPS_MAX_NAME_LEN]; /* simbolic name */ char path[PPS_MAX_NAME_LEN]; /* path of connected device */ int mode; /* PPS's allowed mode */ |
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void (*echo)(struct pps_device *pps, int event, void *data); /* PPS echo function */ |
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struct module *owner; struct device *dev; }; |
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struct pps_event_time { |
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#ifdef CONFIG_NTP_PPS struct timespec ts_raw; #endif /* CONFIG_NTP_PPS */ |
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struct timespec ts_real; }; |
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/* The main struct */ struct pps_device { struct pps_source_info info; /* PSS source info */ struct pps_kparams params; /* PPS's current params */ __u32 assert_sequence; /* PPS' assert event seq # */ __u32 clear_sequence; /* PPS' clear event seq # */ struct pps_ktime assert_tu; struct pps_ktime clear_tu; int current_mode; /* PPS mode at event time */ |
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unsigned int last_ev; /* last PPS event id */ |
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wait_queue_head_t queue; /* PPS event queue */ unsigned int id; /* PPS source unique ID */ struct cdev cdev; struct device *dev; |
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struct fasync_struct *async_queue; /* fasync method */ spinlock_t lock; |
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}; /* * Global variables */ |
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extern struct device_attribute pps_attrs[]; /* * Exported functions */ |
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extern struct pps_device *pps_register_source( struct pps_source_info *info, int default_params); extern void pps_unregister_source(struct pps_device *pps); |
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extern int pps_register_cdev(struct pps_device *pps); extern void pps_unregister_cdev(struct pps_device *pps); |
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extern void pps_event(struct pps_device *pps, struct pps_event_time *ts, int event, void *data); |
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static inline void timespec_to_pps_ktime(struct pps_ktime *kt, struct timespec ts) { kt->sec = ts.tv_sec; kt->nsec = ts.tv_nsec; } |
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#ifdef CONFIG_NTP_PPS static inline void pps_get_ts(struct pps_event_time *ts) { getnstime_raw_and_real(&ts->ts_raw, &ts->ts_real); } #else /* CONFIG_NTP_PPS */ |
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static inline void pps_get_ts(struct pps_event_time *ts) { getnstimeofday(&ts->ts_real); } |
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#endif /* CONFIG_NTP_PPS */ |
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#endif /* LINUX_PPS_KERNEL_H */ |
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