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Annotation of driverkit/Examples/i386Loadable/NullDriver.m, revision 1.1.1.1

1.1       root        1: /*
                      2:  * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
                      3:  *
                      4:  * @APPLE_LICENSE_HEADER_START@
                      5:  * 
                      6:  * Portions Copyright (c) 1999 Apple Computer, Inc.  All Rights
                      7:  * Reserved.  This file contains Original Code and/or Modifications of
                      8:  * Original Code as defined in and that are subject to the Apple Public
                      9:  * Source License Version 1.1 (the "License").  You may not use this file
                     10:  * except in compliance with the License.  Please obtain a copy of the
                     11:  * License at http://www.apple.com/publicsource and read it before using
                     12:  * this file.
                     13:  * 
                     14:  * The Original Code and all software distributed under the License are
                     15:  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
                     16:  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
                     17:  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
                     18:  * FITNESS FOR A PARTICULAR PURPOSE OR NON- INFRINGEMENT.  Please see the
                     19:  * License for the specific language governing rights and limitations
                     20:  * under the License.
                     21:  * 
                     22:  * @APPLE_LICENSE_HEADER_END@
                     23:  */
                     24: /*     Copyright (c) 1993 NeXT Computer, Inc.  All rights reserved. 
                     25:  *
                     26:  * Example of a loadable i386 driver. This driver doesn't do anything
                     27:  * other than show that it has been loaded, probed, and has a valid
                     28:  * IOEISADeviceDescription.
                     29:  *
                     30:  * HISTORY
                     31:  * 04-Feb-93    Doug Mitchell at NeXT
                     32:  *      Created. 
                     33:  */
                     34: #import <driverkit/i386/directDevice.h>
                     35: #import <driverkit/i386/IOEISADeviceDescription.h>
                     36: #import <driverkit/generalFuncs.h>
                     37: #import "NullDriver.h"
                     38: #import <kernserv/kern_server_types.h>
                     39: 
                     40: /*
                     41:  * Allocate an instance variable to be used by the kernel server interface
                     42:  * routines for initializing and accessing this service.
                     43:  */
                     44: kern_server_t NullDriverInstance;
                     45: 
                     46: static int nullDriverUnit = 0;
                     47: 
                     48: @implementation NullDriver
                     49: 
                     50: /*
                     51:  *  Probe, configure board and init new instance.
                     52:  */
                     53: + (BOOL)probe:deviceDescription
                     54: {
                     55:        NullDriver *driver = [self alloc];
                     56: 
                     57:        [driver setDeviceDescription:deviceDescription];
                     58:        [driver initDriver];
                     59:        return YES;
                     60: }
                     61: 
                     62: - (void)initDriver
                     63: {
                     64:        id deviceDescription = [self deviceDescription];
                     65:        char name[80];
                     66:        
                     67:        IOLog("NullDriver: interrupt %d channel %d\n",
                     68:                [deviceDescription interrupt], 
                     69:                [deviceDescription channel]);
                     70:        [self setUnit:nullDriverUnit];
                     71:        sprintf(name, "NullDriver%d", nullDriverUnit++);
                     72:        [self setName:name];
                     73:        [self setLocation:NULL];
                     74:        [self registerDevice];
                     75:        return; 
                     76: }
                     77: 

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