Hi,
Well you are right, Kernel level, drivers and below is not my area of
expertise, API and frameworks in User level is more my expertise. I
understand the principles of USB and the USB class drivers, and have spend a
fair amount of time in IOKit extracting device info.
But I've always wanted to have a go writing a USB driver and I guess a
code less kext would be a good area to start :-). Can you recommend some any
where about these code less kext as searching developer.apple.com doesn't
return anything much, and googling doesn't either apart from links to this
mail list. (Was there every a WWDC session on this ?, as I have access to
those for last couple years ?)
I'm guessing a codeless kext is just a normal kext bundle but just has a
Info.plist and nothing else ?
I have entered rdar://4783190 as well, just in case I fail.
Thanks
Mark.
> Message: 1
> Date: Sat, 14 Oct 2006 13:54:22 -0600
> From: Fernando Urbina <email@hidden>
> Subject: Re: Apple MASS storage driver
> To: USB List at Apple <email@hidden>
> Message-ID: <email@hidden>
> Content-Type: text/plain; charset=US-ASCII; delsp=yes; format=flowed
>
> Sounds like you're over your head. As I said, you don't want to do
> this for all class devices. You want a vendor-specific kext and you
> should NOT be modifying a system kext. If the above doesn't make
> much sense, I suggest you instead file a bug at http://
> bugreporter.apple.com. Please include the device descriptor when the
> phone is in both the CDC mode and the mass storage mode.
>
> BTW, you could also write a user space app that just issues a
> SetConfiguration() to your device. Then, when you want it to load
> the mass storage interface, you just run that app.
>
> HTH,
>
> --
> Fernando Urbina
> USB Technology Team
> Apple Computer, Inc.
>
> On Oct 13, 2006, at 3:05 PM, Mark Thomas wrote:
>
>> Ok, I'm up to trying this, so this within IOUSBFamily.kext then within
>> IOUSBCompositeDriver.kext update the Info.plist within
>> IOKitPersonalities ?
>>
>> bDeviceClass 2
>> bDeviceProtocol 0
>> bDeviceSubClass 0
>> CFBundleIdentifier com.apple.driver.AppleUSBComposite
>> IOClass IOUSBCompositeDriver
>> IOProviderClass IOUSBDevice
>>
>> as I gave this a go and nothing changed :-(, or did I miss
>> understand you
>> ?
>>
>> Thanks
>> Mark.
>>
>>> Ah, the problem is that the phone is NOT changing the device
>>> descriptor:
>>>
>>> Device Class: 2 (Communication)
>>> Device Subclass: 0
>>> Device Protocol: 0
>>>
>>> Our CDC driver will fail to match to that device 'cause it won't find
>>> the interfaces. Our composite driver will not load against it, cause
>>> it's not a composite device.
>>>
>>> You can create a code-less kext for that particular device that uses
>>> the composite driver as the CFBundleIndentifier. You can look at the
>>> IOUSBCompositeDriver.kext Info.plist and see how we do it for a
>>> particular class of devices. You would need to do it just for your
>>> device, not for the whole CDC devices.
>>>
>>> As for it not charging, I assume it's a feature of the phone.
>>>
>>> --
>>> Fernando Urbina
>>> USB Technology Team
>>> Apple Computer, Inc.
>>>
>>> On Oct 13, 2006, at 2:16 PM, Mark Thomas wrote:
>>>
>>>> In the IORegistry tab there is
>>>>
>>>> (IOService Plane option)
>>>> usb@1B <class IOPCIDevice>
>>>> AppleUSBOHCI <class AppleUSBOHCI>
>>>> OHCI Root Hub Simulation@1B <class IOUSBRootHubDevice>
>>>> P990i@1b100000 <class IOUSBDevice>
>>>> IOUSBUserClientInit <class IOUSBUserClientInit>
>>>>
>>>> (IOUSB Plane option)
>>>>
>>>> Root <class IORegistryEntry>
>>>> OHCI Root Hub Simulation@1A <class IOUSBRootHubDevice>
>>>> IOUSBDevice@1a100000 <class IOUSBDevice>
>>>> OHCI Root Hub Simulation@1B <class IOUSBRootHubDevice>
>>>> P990i@1b100000 <class IOUSBDevice>
>>>>
>>>> By not working I mean there is no volume appearing, and also the
>>>> phone
>>>> doesn't to start charging like it does when in USB modem mode.
>>>>
>>>> Thanks
>>>> Mark.
>>>>
>>>>> What do you mean by "isn't working"?
>>>>>
>>>>> Can you see if the IOUSBMassStorageDriver has matched to the
>>>>> interface? You can use IORegistryExplorer and follow the
>>>>> IOServicePlane for the device, or use ioreg -l and look for the
>>>>> interface for that device.
>>>>>
>>>>> --
>>>>> Fernando Urbina
>>>>> USB Technology Team
>>>>> Apple Computer, Inc.
>>>>>
>>>>> On Oct 13, 2006, at 2:05 PM, Mark Thomas wrote:
>>>>>
>>>>>> I have a Sony Ericcson P990i which has an option which
>>>>>> reports it
>>>>>> can be
>>>>>> behave like a USB mass storage device when attached via the USB
>>>>>> route.
>>>>>> Unfortunately this isn't working, so looking at the USB Prober
>>>>>> its is
>>>>>> reporting itself as a mass storage device, so wondering what
>>>>>> could be
>>>>>> happening ?
>>>>>
>>>>
>>>
>>
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