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Annotation of driverkit/Examples/UnixDisk/FloppyDisk.m, revision 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: /*     FloppyDisk.m    1.0     01/02/91        (c) 1991 NeXT   
        !            25:  *
        !            26:  * FloppyDisk.m - Implementation for Floppy Disk class. 
        !            27:  *
        !            28:  * HISTORY
        !            29:  * 01-Feb-91    Doug Mitchell at NeXT
        !            30:  *      Created. 
        !            31:  */
        !            32:  
        !            33: #import "FloppyDisk.h"
        !            34: #import <bsd/sys/types.h>
        !            35: #import <bsd/dev/fd_extern.h>
        !            36: #import <bsd/libc.h>
        !            37: #import <bsd/sys/file.h>
        !            38: #import <bsd/dev/disk.h>
        !            39: #import <errno.h>
        !            40: #import "unixDiskUxpr.h"
        !            41: #import <driverkit/volCheck.h>
        !            42: 
        !            43: #define NUM_FLOPPY_THREADS     2
        !            44: #define FLOPPY_RAW_NAME                "fd"
        !            45: 
        !            46: @implementation FloppyDisk
        !            47: 
        !            48: /*
        !            49:  * Probe hardware to determine how many instances to alloc and init. This 
        !            50:  * is a hard coded kludge for now.
        !            51:  */
        !            52: #if    0
        !            53: + (void)IOProbe:serverId
        !            54: {
        !            55:        int     floppy_unit;
        !            56:        id      floppyId = nil;
        !            57:        
        !            58:        /*
        !            59:         * Attempt to instantiate and init each possible floppy disk.
        !            60:         */
        !            61:        for(floppy_unit=FLOPPY_UNIT_MIN; 
        !            62:            floppy_unit<=FLOPPY_UNIT_MAX; 
        !            63:            floppy_unit++) {
        !            64:                if(floppyId == nil)
        !            65:                        floppyId = [self alloc];
        !            66:                
        !            67:                /*
        !            68:                 * Avoid free/alloc if this init fails.
        !            69:                 */
        !            70:                if([floppyId floppyInit:floppy_unit 
        !            71:                    sender:serverId] == nil) 
        !            72:                        continue;
        !            73:                else {
        !            74:                        /*
        !            75:                         * Success. Have DiskObject superclass take care of 
        !            76:                         * the rest.
        !            77:                         */
        !            78:                        [floppyId registerDevice];
        !            79:                        [floppyId registerDisk];
        !            80:                        floppyId = nil;
        !            81:                }
        !            82:        }
        !            83:        if(floppyId)
        !            84:                [floppyId free];
        !            85: }
        !            86: #endif 0
        !            87: 
        !            88: /*
        !            89:  * init one instance for specified disk.
        !            90:  */
        !            91: - floppyInit:(int)diskNum
        !            92: {
        !            93:        char *name;
        !            94:        int thread_num;
        !            95:        
        !            96:        xpr_ud("FloppyDisk : init: unit %d\n", diskNum, 2,3,4,5);
        !            97:        
        !            98:        [self setUnit:diskNum];
        !            99:        name = malloc(10);
        !           100:        sprintf(name, "%s%d", FLOPPY_RAW_NAME, diskNum);
        !           101:        [self setName:(const char *)name];
        !           102:        [self setDeviceKind:"Unix Floppy Disk"];
        !           103:        [self setLocation:NULL];
        !           104:        [self setDriveName:"Sony Floppy"];
        !           105:        [self setDiskType:PR_DRIVE_FLOPPY];
        !           106:        [self setWriteProtected:0];
        !           107:        
        !           108:        /*
        !           109:         * Do a unix open  for each thread. All I/O here goes thru the live 
        !           110:         * partition.
        !           111:         */
        !           112:        sprintf(unix_name, "/dev/rfd%db", diskNum);
        !           113:        for(thread_num=0; thread_num<NUM_FLOPPY_THREADS; thread_num++) {
        !           114:                unix_fd[thread_num] = open(unix_name, O_RDWR, 0);
        !           115:                if(unix_fd[thread_num] < 0) {
        !           116:                
        !           117:                        /*
        !           118:                         * Maybe it's read-only.
        !           119:                         */
        !           120:                        unix_fd[thread_num] = open(unix_name, O_RDONLY, 0);
        !           121:                        if(unix_fd[thread_num] < 0) {
        !           122:                                perror("floppyInit open()");
        !           123:                                return(nil);
        !           124:                        }
        !           125:                        [self setWriteProtected:1];
        !           126:                }
        !           127:        }
        !           128:        
        !           129:        /*
        !           130:         * Let superclass take care of initializing inherited instance
        !           131:         * variables.
        !           132:         */
        !           133:        [self unixInit:NUM_FLOPPY_THREADS];
        !           134:        if([self updatePhysicalParameters])
        !           135:                return nil;
        !           136:        return self;
        !           137: }
        !           138: 
        !           139: /*
        !           140:  * Get physical parameters (dev_size, block_size, etc.) from new disk.
        !           141:  */
        !           142: - (IOReturn)updatePhysicalParameters
        !           143: {
        !           144:        struct fd_format_info format_info;
        !           145:        int rtn;
        !           146:                
        !           147:        /*
        !           148:         * try to get format info of the drive.
        !           149:         */
        !           150:        [self setFormattedInternal:0];
        !           151:        [self setRemovable:1];
        !           152:        rtn = ioctl(unix_fd[0], FDIOCGFORM, &format_info);
        !           153:        if(rtn) {
        !           154:                xpr_ud("FloppyDisk FDIOCGFORM: errno %d\n", errno, 2,3,4,5);
        !           155:                return(IO_R_IO);
        !           156:        }
        !           157:        if(!(format_info.flags & FFI_FORMATTED)) {
        !           158:                xpr_ud("FloppyDisk Unformatted\n", errno, 2,3,4,5);
        !           159:                [self setBlockSize:-1];
        !           160:                [self setDiskSize:0];   
        !           161:        }
        !           162:        else {
        !           163:                [self setFormattedInternal:1];
        !           164:                [self setBlockSize:format_info.sectsize_info.sect_size];
        !           165:                [self setDiskSize:format_info.total_sects];
        !           166:        }
        !           167:        if(format_info.flags & FFI_WRITEPROTECT) {
        !           168:                [self setWriteProtected:1];
        !           169:        }
        !           170:        else {
        !           171:                [self setWriteProtected:0];
        !           172:        }
        !           173:        return(IO_R_SUCCESS);
        !           174: }
        !           175: 

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