| Nicholas Flintham | 1e3d311 | 2013-04-10 10:48:38 +0100 | [diff] [blame^] | 1 | /* |
| 2 | * posix-clock.h - support for dynamic clock devices |
| 3 | * |
| 4 | * Copyright (C) 2010 OMICRON electronics GmbH |
| 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 | #ifndef _LINUX_POSIX_CLOCK_H_ |
| 21 | #define _LINUX_POSIX_CLOCK_H_ |
| 22 | |
| 23 | #include <linux/cdev.h> |
| 24 | #include <linux/fs.h> |
| 25 | #include <linux/poll.h> |
| 26 | #include <linux/posix-timers.h> |
| 27 | #include <linux/rwsem.h> |
| 28 | |
| 29 | struct posix_clock; |
| 30 | |
| 31 | struct posix_clock_operations { |
| 32 | struct module *owner; |
| 33 | |
| 34 | int (*clock_adjtime)(struct posix_clock *pc, struct timex *tx); |
| 35 | |
| 36 | int (*clock_gettime)(struct posix_clock *pc, struct timespec *ts); |
| 37 | |
| 38 | int (*clock_getres) (struct posix_clock *pc, struct timespec *ts); |
| 39 | |
| 40 | int (*clock_settime)(struct posix_clock *pc, |
| 41 | const struct timespec *ts); |
| 42 | |
| 43 | int (*timer_create) (struct posix_clock *pc, struct k_itimer *kit); |
| 44 | |
| 45 | int (*timer_delete) (struct posix_clock *pc, struct k_itimer *kit); |
| 46 | |
| 47 | void (*timer_gettime)(struct posix_clock *pc, |
| 48 | struct k_itimer *kit, struct itimerspec *tsp); |
| 49 | |
| 50 | int (*timer_settime)(struct posix_clock *pc, |
| 51 | struct k_itimer *kit, int flags, |
| 52 | struct itimerspec *tsp, struct itimerspec *old); |
| 53 | int (*fasync) (struct posix_clock *pc, |
| 54 | int fd, struct file *file, int on); |
| 55 | |
| 56 | long (*ioctl) (struct posix_clock *pc, |
| 57 | unsigned int cmd, unsigned long arg); |
| 58 | |
| 59 | int (*mmap) (struct posix_clock *pc, |
| 60 | struct vm_area_struct *vma); |
| 61 | |
| 62 | int (*open) (struct posix_clock *pc, fmode_t f_mode); |
| 63 | |
| 64 | uint (*poll) (struct posix_clock *pc, |
| 65 | struct file *file, poll_table *wait); |
| 66 | |
| 67 | int (*release) (struct posix_clock *pc); |
| 68 | |
| 69 | ssize_t (*read) (struct posix_clock *pc, |
| 70 | uint flags, char __user *buf, size_t cnt); |
| 71 | }; |
| 72 | |
| 73 | struct posix_clock { |
| 74 | struct posix_clock_operations ops; |
| 75 | struct cdev cdev; |
| 76 | struct kref kref; |
| 77 | struct rw_semaphore rwsem; |
| 78 | bool zombie; |
| 79 | void (*release)(struct posix_clock *clk); |
| 80 | }; |
| 81 | |
| 82 | int posix_clock_register(struct posix_clock *clk, dev_t devid); |
| 83 | |
| 84 | void posix_clock_unregister(struct posix_clock *clk); |
| 85 | |
| 86 | #endif |