December 2011
Intermediate to advanced
485 pages
15h 47m
English
Content preview from OS X and iOS Kernel Programming
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I/O Kit USB Support
USB support in the I/O Kit is provided by the IOUSBFamily, which is a dynamically loadable KEXT, identified by the bundle identifier com.apple.iokit.IOUSBFamily. The USB family provides the central core of USB handling in the kernel and contains drivers for the host controllers, as well as abstraction classes for representing USB devices, interfaces, and pipes. The class hierarchy of the USB Family is shown in Figure 8-4.
Figure 8-4. IOUSBFamily class hierarchy
Most of these classes are irrelevant if you only want to implement a driver for a USB device. The main classes used for USB driver development are shown in gray, ...
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