1 /* 2 * Copyright (c) 2014 François Tigeot 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice unmodified, this list of conditions, and the following 10 * disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25 */ 26 27 #ifndef _LINUX_DELAY_H_ 28 #define _LINUX_DELAY_H_ 29 30 #include <linux/jiffies.h> 31 #include <sys/systm.h> 32 33 static inline void msleep(unsigned int msecs) 34 { 35 static int dummy; 36 int delay = MAX(msecs*hz/1000, 1); 37 38 tsleep(&dummy, 0, "linux_msleep", delay); 39 } 40 41 static __inline void 42 mdelay(unsigned long msecs) 43 { 44 int loops = msecs; 45 while (loops--) 46 DELAY(1000); 47 } 48 49 static inline void ndelay(unsigned long x) 50 { 51 DELAY(howmany(x, 1000)); 52 } 53 54 static __inline void 55 usleep_range(unsigned long min, unsigned long max) 56 { 57 DELAY(min); 58 } 59 60 #endif /* _LINUX_DELAY_H_ */ 61