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Annotation of kernel/bsd/dev/ppc/drvOHare/ohare.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: 
        !            25: 
        !            26: 
        !            27: #include <machdep/ppc/proc_reg.h>
        !            28: #include <machdep/ppc/powermac.h>
        !            29: 
        !            30: #import "ohare.h"
        !            31: 
        !            32: 
        !            33: @implementation AppleOHare
        !            34: 
        !            35: + (BOOL)probe:(IOPCIDevice *)deviceDescription
        !            36: {
        !            37:   AppleOHare  *OHareInstance;
        !            38: 
        !            39:   OHareInstance = [self alloc];
        !            40:   
        !            41:   return [OHareInstance initFromDeviceDescription:deviceDescription] != nil;
        !            42: }
        !            43: 
        !            44: 
        !            45: - initFromDeviceDescription:(IOPCIDevice *)deviceDescription
        !            46: {
        !            47:   unsigned long PCICommandReg;
        !            48: 
        !            49:   if ([super initFromDeviceDescription:deviceDescription] == nil) {
        !            50:     IOLog("AppleOHare: [super initFromDeviceDescription] failed\n");
        !            51:     return nil;
        !            52:   }
        !            53:   
        !            54:   // Set the PCI Command Register for Bus Master, Memory Access
        !            55:   // and not I/O Access.
        !            56:   [deviceDescription configReadLong:0x04 value:&PCICommandReg];
        !            57:   PCICommandReg |= (2 | 1);  // Master & Memory
        !            58:   PCICommandReg &= ~4;       // Not I/O
        !            59:   [deviceDescription configWriteLong:0x04 value:PCICommandReg];
        !            60: 
        !            61:   [self mapMemoryRange:0 to:(vm_address_t *)&ioBaseOHare
        !            62:        findSpace:YES cache:IO_CacheOff];
        !            63: 
        !            64:   powermac_io_info.io_base2 = ioBaseOHare;
        !            65: 
        !            66:   *(long *)(ioBaseOHare + 0x00024) = 0;    /* Disable all interrupts */
        !            67:   eieio();
        !            68:   *(long *)(ioBaseOHare + 0x00028) = 0xffffffff; /* Clear pending interrupts */
        !            69:   eieio();
        !            70:   *(long *)(ioBaseOHare + 0x00024)  = 0;    /* Disable all interrupts */
        !            71:   eieio();
        !            72:   
        !            73:   [deviceDescription setInterruptList:NULL num:0];
        !            74: 
        !            75:   [self setName:"AppleOHare"];
        !            76:   [self registerDevice];
        !            77: 
        !            78:   return self;
        !            79: }
        !            80: 
        !            81: @end

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