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sysmon.c revision 1.6 
      1 /*	$NetBSD: sysmon.c,v 1.6 2002/09/06 13:18:43 gehenna 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/cdefs.h>
     42 __KERNEL_RCSID(0, "$NetBSD: sysmon.c,v 1.6 2002/09/06 13:18:43 gehenna 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,
     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