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Re: Kext description to not seize the default mass storage driver




Hi Heiko,

Where do you want to prevent the matching from occurring? On the IOUSBDevice or the IOUSBInterface? Your plist looks like you want to match to the interface, yet you have an IOProviderClass of IOUSBDevice.

What I would try is set the IOProviderClass to IOUSBInterface, and not use that mergenub thing, instead just set the IOClass to IOService with an appropriately high IOProbeScore.

That might not be correct thing to do 'tho :) But in any case try bumping up the IOProbeScore a little if the matching isn't workign the way you want.

{P^/

On Tue, 8 May 2007 at 11:55 +0200, Heiko Abraham wrote:

I have a USB mass storage device (class 0x08, sub class 0x06).

For devices like this, typical the darwin kernel load automaticly
the own usb mass storage Kext.

Now I looking for a way, that the kernel should not load the default
driver. I want, that i can communicate with the device over IOUSBLib,
i.e. over IOUSBDevice class.

The MassStorage class is not required. I prefere to communicate with the
device directly from user space (without any own kext).

I mean, I need only a empty Kext-directory structure with a Info.plist
like:


<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE plist PUBLIC "-//Apple Computer//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd";> <plist version="1.0"> <dict> <key>CFBundleDevelopmentRegion</key> <string>English</string> <key>CFBundleIdentifier</key> <string>com.wibu.codemeter.CmSwitch</string> <key>CFBundleInfoDictionaryVersion</key> <string>6.0</string> <key>CFBundlePackageType</key> <string>KEXT</string> <key>CFBundleShortVersionString</key> <string>1.0.5</string> <key>CFBundleSignature</key> <string>????</string> <key>CFBundleVersion</key> <string>1.0.5</string> <key>IOKitPersonalities</key> <dict> <key>CM-Stick orig</key> <dict> <key>CFBundleIdentifier</key> <string>com.apple.driver.AppleUSBMergeNub</string> <key>IOClass</key> <string>AppleUSBMergeNub</string> <key>IOProviderClass</key> <string>IOUSBDevice</string> <key>IOProviderMergeProperties</key> <dict> <key>ClassicMustNotSeize</key> <true/> </dict> <key>bConfigurationValue</key> <integer>1</integer> <key>bInterfaceClass</key> <integer>8</integer> <key>bInterfaceNumber</key> <integer>0</integer> <key>bInterfaceSubClass</key> <integer>6</integer> <key>bcdDevice</key> <integer>256</integer> <key>idProduct</key> <integer>1233</integer> <key>idVendor</key> <integer>1615</integer> </dict> </dict> <key>OSBundleLibraries</key> <dict> <key>com.apple.driver.AppleUSBMergeNub</key> <string>1.8.3b1</string> <key>com.apple.iokit.IOUSBFamily</key> <string>1.8</string> </dict> </dict> </plist>


But this will not work. Whats wrong? Can somewhere give a hint?

Regards,
Heiko
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