Date: Fri, 2 Dec 2005 17:24:11 +0800 From: kylin <fierykylin@gmail.com> To: "M. Warner Losh" <imp@bsdimp.com> Cc: jhb@freebsd.org, freebsd-usb@freebsd.org Subject: Re: the mechanism of USB hotplug Message-ID: <87ab37ab0512020124h5e7e0112rb0811c34ec4d909f@mail.gmail.com> In-Reply-To: <20051202.015736.66169514.imp@bsdimp.com> References: <20051201.231433.32736713.imp@bsdimp.com> <20051202.003353.21274600.imp@bsdimp.com> <87ab37ab0512020030u2dcdc3ecj69fa27ec6840ca3b@mail.gmail.com> <20051202.015736.66169514.imp@bsdimp.com>
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wawo ! thanks again sir :) that really benifit me alot :) On 12/2/05, M. Warner Losh <imp@bsdimp.com> wrote: > In message: <87ab37ab0512020030u2dcdc3ecj69fa27ec6840ca3b@mail.gmail.com> > I suspect that if one were to write a hot-plug PCI bus bridge that it > would mostly work similar to cbb, but with some differences due to API > differences. I found that the cbb 's bus number dynamic allocation way s need to change for the pci bridge 's hotplug ,but not sure ... acording to the spec > The USB stuff, btw, is confusingly located in uhub.c. There are a > number of bugs in the newbus integration of usb, and various people > have tried to fix it. In usbland uhub is the bus, not the usb device, > which is confusing at first, and poorly documented. The usb_port.h > obfuscation also doesn't help. > > Warner > may be usb inherited from the SCSI way :) and speak of SCSI 's hotplug ,there r so many layers -- we who r about to die,salute u!
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