1 /* $NetBSD: sysmon.c,v 1.7 2002/10/23 09:13:57 jdolecek 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/cdefs.h> 42 __KERNEL_RCSID(0, "$NetBSD: sysmon.c,v 1.7 2002/10/23 09:13:57 jdolecek Exp $"); 43 44 #include <sys/param.h> 45 #include <sys/conf.h> 46 #include <sys/errno.h> 47 #include <sys/fcntl.h> 48 #include <sys/lock.h> 49 #include <sys/callout.h> 50 #include <sys/kernel.h> 51 #include <sys/systm.h> 52 #include <sys/proc.h> 53 54 #include <dev/sysmon/sysmonvar.h> 55 #include <dev/sysmon/sysmonconf.h> 56 57 dev_type_open(sysmonopen); 58 dev_type_close(sysmonclose); 59 dev_type_ioctl(sysmonioctl); 60 61 const struct cdevsw sysmon_cdevsw = { 62 sysmonopen, sysmonclose, noread, nowrite, sysmonioctl, 63 nostop, notty, nopoll, nommap, nokqfilter, 64 }; 65 66 /* 67 * sysmonopen: 68 * 69 * Open the system monitor device. 70 */ 71 int 72 sysmonopen(dev_t dev, int flag, int mode, struct proc *p) 73 { 74 int error; 75 76 switch (minor(dev)) { 77 #if NSYSMON_ENVSYS > 0 78 case SYSMON_MINOR_ENVSYS: 79 error = sysmonopen_envsys(dev, flag, mode, p); 80 break; 81 #endif 82 #if NSYSMON_WDOG > 0 83 case SYSMON_MINOR_WDOG: 84 error = sysmonopen_wdog(dev, flag, mode, p); 85 break; 86 #endif 87 default: 88 error = ENODEV; 89 } 90 91 return (error); 92 } 93 94 /* 95 * sysmonclose: 96 * 97 * Close the system monitor device. 98 */ 99 int 100 sysmonclose(dev_t dev, int flag, int mode, struct proc *p) 101 { 102 int error; 103 104 switch (minor(dev)) { 105 #if NSYSMON_ENVSYS > 0 106 case SYSMON_MINOR_ENVSYS: 107 error = sysmonclose_envsys(dev, flag, mode, p); 108 break; 109 #endif 110 #if NSYSMON_WDOG > 0 111 case SYSMON_MINOR_WDOG: 112 error = sysmonclose_wdog(dev, flag, mode, p); 113 break; 114 #endif 115 default: 116 error = ENODEV; 117 } 118 119 return (error); 120 } 121 122 /* 123 * sysmonioctl: 124 * 125 * Perform a control request. 126 */ 127 int 128 sysmonioctl(dev_t dev, u_long cmd, caddr_t data, int flag, struct proc *p) 129 { 130 int error; 131 132 switch (minor(dev)) { 133 #if NSYSMON_ENVSYS > 0 134 case SYSMON_MINOR_ENVSYS: 135 error = sysmonioctl_envsys(dev, cmd, data, flag, p); 136 break; 137 #endif 138 #if NSYSMON_WDOG > 0 139 case SYSMON_MINOR_WDOG: 140 error = sysmonioctl_wdog(dev, cmd, data, flag, p); 141 break; 142 #endif 143 default: 144 error = ENODEV; 145 } 146 147 return (error); 148 } 149