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sysmon.c revision 1.4 
      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 (at) 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