Home | History | Annotate | Line # | Download | only in sysmon
sysmon.c revision 1.4.8.1 
      1 /*	$NetBSD: sysmon.c,v 1.4.8.1 2001/09/18 19:13:51 fvdl 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 #include <sys/vnode.h>
     51 
     52 #include <miscfs/specfs/specdev.h>
     53 
     54 #include <dev/sysmon/sysmonvar.h>
     55 #include <dev/sysmon/sysmonconf.h>
     56 
     57 cdev_decl(sysmon);
     58 
     59 /*
     60  * sysmonopen:
     61  *
     62  *	Open the system monitor device.
     63  */
     64 int
     65 sysmonopen(struct vnode *devvp, int flag, int mode, struct proc *p)
     66 {
     67 	int error;
     68 
     69 	switch (minor(devvp->v_rdev)) {
     70 #if NSYSMON_ENVSYS > 0
     71 	case SYSMON_MINOR_ENVSYS:
     72 		error = sysmonopen_envsys(devvp, flag, mode, p);
     73 		break;
     74 #endif
     75 #if NSYSMON_WDOG > 0
     76 	case SYSMON_MINOR_WDOG:
     77 		error = sysmonopen_wdog(devvp, flag, mode, p);
     78 		break;
     79 #endif
     80 	default:
     81 		error = ENODEV;
     82 	}
     83 
     84 	return (error);
     85 }
     86 
     87 /*
     88  * sysmonclose:
     89  *
     90  *	Close the system monitor device.
     91  */
     92 int
     93 sysmonclose(struct vnode *devvp, int flag, int mode, struct proc *p)
     94 {
     95 	int error;
     96 
     97 	switch (minor(devvp->v_rdev)) {
     98 #if NSYSMON_ENVSYS > 0
     99 	case SYSMON_MINOR_ENVSYS:
    100 		error = sysmonclose_envsys(devvp, flag, mode, p);
    101 		break;
    102 #endif
    103 #if NSYSMON_WDOG > 0
    104 	case SYSMON_MINOR_WDOG:
    105 		error = sysmonclose_wdog(devvp, flag, mode, p);
    106 		break;
    107 #endif
    108 	default:
    109 		error = ENODEV;
    110 	}
    111 
    112 	return (error);
    113 }
    114 
    115 /*
    116  * sysmonioctl:
    117  *
    118  *	Perform a control request.
    119  */
    120 int
    121 sysmonioctl(struct vnode *devvp, u_long cmd, caddr_t data, int flag,
    122 	    struct proc *p)
    123 {
    124 	int error;
    125 
    126 	switch (minor(devvp->v_rdev)) {
    127 #if NSYSMON_ENVSYS > 0
    128 	case SYSMON_MINOR_ENVSYS:
    129 		error = sysmonioctl_envsys(devvp, cmd, data, flag, p);
    130 		break;
    131 #endif
    132 #if NSYSMON_WDOG > 0
    133 	case SYSMON_MINOR_WDOG:
    134 		error = sysmonioctl_wdog(devvp, cmd, data, flag, p);
    135 		break;
    136 #endif
    137 	default:
    138 		error = ENODEV;
    139 	}
    140 
    141 	return (error);
    142 }
    143