1 /* $NetBSD: sysmon.c,v 1.4 2000/11/05 04:06:13 thorpej Exp $ */ 2 3 /*- 4 * Copyright (c) 2000 Zembu Labs, Inc. 5 * All rights reserved. 6 * 7 * Author: Jason R. Thorpe <thorpej@zembu.com> 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. All advertising materials mentioning features or use of this software 18 * must display the following acknowledgement: 19 * This product includes software developed by Zembu Labs, Inc. 20 * 4. Neither the name of Zembu Labs nor the names of its employees may 21 * be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY ZEMBU LABS, INC. ``AS IS'' AND ANY EXPRESS 25 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WAR- 26 * RANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DIS- 27 * CLAIMED. IN NO EVENT SHALL ZEMBU LABS BE LIABLE FOR ANY DIRECT, INDIRECT, 28 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 29 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 30 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 31 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 32 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 33 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 34 */ 35 36 /* 37 * Clearing house for system monitoring hardware. We currently 38 * handle environmental sensors and watchdog timers. 39 */ 40 41 #include <sys/param.h> 42 #include <sys/conf.h> 43 #include <sys/errno.h> 44 #include <sys/fcntl.h> 45 #include <sys/lock.h> 46 #include <sys/callout.h> 47 #include <sys/kernel.h> 48 #include <sys/systm.h> 49 #include <sys/proc.h> 50 51 #include <dev/sysmon/sysmonvar.h> 52 #include <dev/sysmon/sysmonconf.h> 53 54 cdev_decl(sysmon); 55 56 /* 57 * sysmonopen: 58 * 59 * Open the system monitor device. 60 */ 61 int 62 sysmonopen(dev_t dev, int flag, int mode, struct proc *p) 63 { 64 int error; 65 66 switch (minor(dev)) { 67 #if NSYSMON_ENVSYS > 0 68 case SYSMON_MINOR_ENVSYS: 69 error = sysmonopen_envsys(dev, flag, mode, p); 70 break; 71 #endif 72 #if NSYSMON_WDOG > 0 73 case SYSMON_MINOR_WDOG: 74 error = sysmonopen_wdog(dev, flag, mode, p); 75 break; 76 #endif 77 default: 78 error = ENODEV; 79 } 80 81 return (error); 82 } 83 84 /* 85 * sysmonclose: 86 * 87 * Close the system monitor device. 88 */ 89 int 90 sysmonclose(dev_t dev, int flag, int mode, struct proc *p) 91 { 92 int error; 93 94 switch (minor(dev)) { 95 #if NSYSMON_ENVSYS > 0 96 case SYSMON_MINOR_ENVSYS: 97 error = sysmonclose_envsys(dev, flag, mode, p); 98 break; 99 #endif 100 #if NSYSMON_WDOG > 0 101 case SYSMON_MINOR_WDOG: 102 error = sysmonclose_wdog(dev, flag, mode, p); 103 break; 104 #endif 105 default: 106 error = ENODEV; 107 } 108 109 return (error); 110 } 111 112 /* 113 * sysmonioctl: 114 * 115 * Perform a control request. 116 */ 117 int 118 sysmonioctl(dev_t dev, u_long cmd, caddr_t data, int flag, struct proc *p) 119 { 120 int error; 121 122 switch (minor(dev)) { 123 #if NSYSMON_ENVSYS > 0 124 case SYSMON_MINOR_ENVSYS: 125 error = sysmonioctl_envsys(dev, cmd, data, flag, p); 126 break; 127 #endif 128 #if NSYSMON_WDOG > 0 129 case SYSMON_MINOR_WDOG: 130 error = sysmonioctl_wdog(dev, cmd, data, flag, p); 131 break; 132 #endif 133 default: 134 error = ENODEV; 135 } 136 137 return (error); 138 } 139