I am trying to understand FreeBSD USB driver stack. The code is not commented and hence it is difficult/time consuming to understand the code. Are there any documents available describing different functions of USB driver.
I am not sure whether you are reading the FreeBSD 8.0 usb code, and if that's not the case I highly recommend you to do that, as usb stack has been completely replaced in the upcoming release by the new one. It is being maintained by Hans Peter Selasky (hps@).
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