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Annotation of XNU/iokit/Drivers/usb/drvAppleOHCI/AppleComposite.cpp, revision 1.1

1.1     ! root        1: /*
        !             2:  * Copyright (c) 1998-2000 Apple Computer, Inc. All rights reserved.
        !             3:  *
        !             4:  * @APPLE_LICENSE_HEADER_START@
        !             5:  * 
        !             6:  * The contents of this file constitute Original Code as defined in and
        !             7:  * are subject to the Apple Public Source License Version 1.1 (the
        !             8:  * "License").  You may not use this file except in compliance with the
        !             9:  * License.  Please obtain a copy of the License at
        !            10:  * http://www.apple.com/publicsource and read it before using this file.
        !            11:  * 
        !            12:  * This Original Code and all software distributed under the License are
        !            13:  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
        !            14:  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
        !            15:  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
        !            16:  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
        !            17:  * License for the specific language governing rights and limitations
        !            18:  * under the License.
        !            19:  * 
        !            20:  * @APPLE_LICENSE_HEADER_END@
        !            21:  */
        !            22: /*
        !            23:  * Copyright (c) 1998 Apple Computer, Inc.  All rights reserved.
        !            24:  *
        !            25:  * HISTORY
        !            26:  *
        !            27:  */
        !            28: 
        !            29: #include <libkern/OSByteOrder.h>
        !            30: #include "AppleComposite.h"
        !            31: #include <IOKit/usb/IOUSBInterface.h>
        !            32: 
        !            33: #include <IOKit/assert.h>
        !            34: 
        !            35: #define super IOService
        !            36: #define DEBUGGING_LEVEL 0
        !            37: 
        !            38: OSDefineMetaClassAndStructors(AppleComposite, IOService)
        !            39: 
        !            40: bool AppleComposite::start(IOService * provider)
        !            41: {
        !            42:     IOReturn                   err = 0;
        !            43:     UInt8                      configNum;
        !            44:     IOUSBDevice::FindInterfaceRequest  req;
        !            45:     IOUSBInterface *           interface;
        !            46:     IOUSBDevice *              device;
        !            47: 
        !            48:     if( !super::start(provider))
        !            49:         return (false);
        !            50: 
        !            51:     // get my device
        !            52:     device = OSDynamicCast(IOUSBDevice, provider);
        !            53:     if(!device)
        !            54:        return false;
        !            55: 
        !            56:     do {
        !            57: #if (DEBUGGING_LEVEL > 0)
        !            58:         IOLog("%s: USB Generic Composite @ %d\n", getName(), _device->address());
        !            59: #endif
        !            60:         // Find the first config/interface
        !            61:         if (device->deviceDescriptor()->numConf < 1)
        !            62:         {
        !            63:             IOLog("%s: no composite configurations\n", getName());
        !            64:             continue;
        !            65:         }
        !            66: 
        !            67:         req.theClass = req.subClass = req.protocol = 0;
        !            68:         req.maxPower = 0;
        !            69:         if ((interface = device->findNextInterface(NULL, &req)) == 0)
        !            70:         {
        !            71:             IOLog("%s: no interface found\n", getName());
        !            72:             continue;
        !            73:         }
        !            74: 
        !            75:         configNum = interface->getConfigValue();
        !            76: 
        !            77:         // set my configuration
        !            78:         if ((err = device->SetConfiguration(configNum)))
        !            79:             continue;
        !            80: 
        !            81: #if (DEBUGGING_LEVEL > 0)
        !            82:         printInterfaceDescriptor(interface->descriptor);
        !            83: #endif
        !            84:         // Set up interface for matching, and release it.
        !            85:        // it's also held by the device (which it is attached to)
        !            86:         interface->registerService();
        !            87:         interface->release();
        !            88: 
        !            89:        // create a new IOUSBInterface nub for each interface
        !            90:         // with the same configuration.
        !            91:        do {
        !            92:             req.theClass = req.subClass = req.protocol = 0;
        !            93:             req.maxPower = 0;
        !            94:             interface = device->findNextInterface(interface, &req);
        !            95:             if (interface == 0)
        !            96:             {
        !            97:                 break;
        !            98:             }
        !            99:             if(interface->getConfigValue() == configNum)
        !           100:                 interface->registerService();
        !           101:             interface->release();
        !           102:         } while (true);
        !           103: 
        !           104:         return(true);
        !           105: 
        !           106:     } while (false);
        !           107: 
        !           108:     IOLog("%s: aborting startup.  err = %d\n", getName(), err);
        !           109:     
        !           110:     return(false);
        !           111: }
        !           112: 
        !           113: 

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