| Nicholas Flintham | 1e3d311 | 2013-04-10 10:48:38 +0100 | [diff] [blame^] | 1 | /* |
| 2 | * PPS API kernel header |
| 3 | * |
| 4 | * Copyright (C) 2009 Rodolfo Giometti <giometti@linux.it> |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU General Public License as published by |
| 8 | * the Free Software Foundation; either version 2 of the License, or |
| 9 | * (at your option) any later version. |
| 10 | * |
| 11 | * This program is distributed in the hope that it will be useful, |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | * GNU General Public License for more details. |
| 15 | * |
| 16 | * You should have received a copy of the GNU General Public License |
| 17 | * along with this program; if not, write to the Free Software |
| 18 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
| 19 | */ |
| 20 | |
| 21 | #ifndef LINUX_PPS_KERNEL_H |
| 22 | #define LINUX_PPS_KERNEL_H |
| 23 | |
| 24 | #include <linux/pps.h> |
| 25 | |
| 26 | #include <linux/cdev.h> |
| 27 | #include <linux/device.h> |
| 28 | #include <linux/time.h> |
| 29 | |
| 30 | |
| 31 | struct pps_device; |
| 32 | |
| 33 | struct pps_source_info { |
| 34 | char name[PPS_MAX_NAME_LEN]; |
| 35 | char path[PPS_MAX_NAME_LEN]; |
| 36 | int mode; |
| 37 | |
| 38 | void (*echo)(struct pps_device *pps, |
| 39 | int event, void *data); |
| 40 | |
| 41 | struct module *owner; |
| 42 | struct device *dev; |
| 43 | }; |
| 44 | |
| 45 | struct pps_event_time { |
| 46 | #ifdef CONFIG_NTP_PPS |
| 47 | struct timespec ts_raw; |
| 48 | #endif |
| 49 | struct timespec ts_real; |
| 50 | }; |
| 51 | |
| 52 | struct pps_device { |
| 53 | struct pps_source_info info; |
| 54 | |
| 55 | struct pps_kparams params; |
| 56 | |
| 57 | __u32 assert_sequence; |
| 58 | __u32 clear_sequence; |
| 59 | struct pps_ktime assert_tu; |
| 60 | struct pps_ktime clear_tu; |
| 61 | int current_mode; |
| 62 | |
| 63 | unsigned int last_ev; |
| 64 | wait_queue_head_t queue; |
| 65 | |
| 66 | unsigned int id; |
| 67 | struct cdev cdev; |
| 68 | struct device *dev; |
| 69 | struct fasync_struct *async_queue; |
| 70 | spinlock_t lock; |
| 71 | }; |
| 72 | |
| 73 | |
| 74 | extern struct device_attribute pps_attrs[]; |
| 75 | |
| 76 | |
| 77 | extern struct pps_device *pps_register_source( |
| 78 | struct pps_source_info *info, int default_params); |
| 79 | extern void pps_unregister_source(struct pps_device *pps); |
| 80 | extern int pps_register_cdev(struct pps_device *pps); |
| 81 | extern void pps_unregister_cdev(struct pps_device *pps); |
| 82 | extern void pps_event(struct pps_device *pps, |
| 83 | struct pps_event_time *ts, int event, void *data); |
| 84 | |
| 85 | static inline void timespec_to_pps_ktime(struct pps_ktime *kt, |
| 86 | struct timespec ts) |
| 87 | { |
| 88 | kt->sec = ts.tv_sec; |
| 89 | kt->nsec = ts.tv_nsec; |
| 90 | } |
| 91 | |
| 92 | #ifdef CONFIG_NTP_PPS |
| 93 | |
| 94 | static inline void pps_get_ts(struct pps_event_time *ts) |
| 95 | { |
| 96 | getnstime_raw_and_real(&ts->ts_raw, &ts->ts_real); |
| 97 | } |
| 98 | |
| 99 | #else |
| 100 | |
| 101 | static inline void pps_get_ts(struct pps_event_time *ts) |
| 102 | { |
| 103 | getnstimeofday(&ts->ts_real); |
| 104 | } |
| 105 | |
| 106 | #endif |
| 107 | |
| 108 | #endif |
| 109 | |