Re: Obtaining an IOSCSIMultimediaCommandsDevice instance
Re: Obtaining an IOSCSIMultimediaCommandsDevice instance
- Subject: Re: Obtaining an IOSCSIMultimediaCommandsDevice instance
- From: email@hidden
- Date: Tue, 24 Jan 2006 19:45:22 -0500 (EST)
- Importance: Normal
Chris,
I am familiar with the ioctls in IOCDMediaBSDClient (READ, READ TOC, etc).
I would like to use (primarily) the READ (10 or 12) command. I need to
set the FUA bit- I don't believe this is possible with the DKIOCCDREAD
ioctl.
> Stephen --
>
> What type of raw commands are you trying to send? Have you looked at
> the list of CD ioctls OS X supports?
>
> -- Chris
>
>
> On Jan 24, 2006, at 3:46 PM, email@hidden wrote:
>
>> Hi Chris,
>>
>> Thanks for the response!
>>
>>> You might want to start out with what you are trying to achieve. Are
>>> you trying to send commands from kernel-level code or user-level
>>> code?
>>
>> Preferably user-level.
>>
>>> If the latter, you might want to check out the sample code found in /
>>> Developer/Examples/IOKit/scsi/SCSITaskLib and consult Accessing
>>> Hardware From Applications (http://developer.apple.com/documentation/
>>> DeviceDrivers/Conceptual/AccessingHardware/AH_Intro/
>>> chapter_1_section_1.html).
>>
>> I've read these now (thanks for the pointer), and also consulted the
>> example code, but I'm still confused. The problem for me is that
>> this all
>> seems geared towards CD/DVD authoring and authoring-capable
>> devices. For
>> my application authoring doesn't matter. All I "need" to do is send a
>> small subset of the MMC-2 commands to the drive to access an audio
>> CD. I
>> have had some success creating an MMCDeviceInterface, but that really
>> doesn't help me because I can't obtain exclusive access from
>> SCSITaskDeviceInterface. Even if I could, I'm not sure how that would
>> help me because I really don't want to send raw SCSI tasks. I
>> still don't
>> understand enough about IOServiceGetMatchingServices to know which
>> key to
>> pass in to try and get an IOSCSIMultimediaCommandsDevice.
>>
>> Stephen
>>
>>>
>>> HTH,
>>>
>>> -- Chris
>>>
>>>
>>> On Jan 24, 2006, at 2:30 PM, email@hidden wrote:
>>>
>>>> I will start by saying the IOKit is pretty much a black box for
>>>> me. I've
>>>> done only basic tasks such as creating a dictionary and calling
>>>> IOServiceGetMatchingServices for it. Unless I've missed something,
>>>> the
>>>> IOKit documentation is slightly less than stunning so I'm asking
>>>> for help
>>>> here.
>>>>
>>>> I want to create an IOSCSIMultimediaCommandsDevice for accessing an
>>>> audio
>>>> CD using MMC-2 commands.
>>>>
>>>> If I may rant for a moment, the superclass to
>>>> IOSCSIMultimediaCommandsDevice is IOSCSIPrimaryCommandsDevice
>>>> defined in
>>>> "IOSCSIPrimaryCommandsDevice.h". I don't even have that header
>>>> file in my
>>>> 10.4u SDK! It's only in the 10.3.9 IOKit. To boot, that class'
>>>> superclass is IOSCSIProtocolInterface which also appears only to
>>>> exist in
>>>> my 10.3.9 SDK.
>>>>
>>>> Anyway, IOSCSIMultimediaCommandsDevice is a subclass of IOService.
>>>> Can
>>>> anyone step me through how I would go about obtaining an instance
>>>> of this
>>>> class?
>>>>
>>>> Thanks!
>>>> _______________________________________________
>>>> Do not post admin requests to the list. They will be ignored.
>>>> Darwin-dev mailing list (email@hidden)
>>>> Help/Unsubscribe/Update your Subscription:
>>>> 40apple.com
>>>>
>>>> This email sent to email@hidden
>>>
>>>
>>
>
>
_______________________________________________
Do not post admin requests to the list. They will be ignored.
Darwin-dev mailing list (email@hidden)
Help/Unsubscribe/Update your Subscription:
This email sent to email@hidden