>-----Original Message----- >From: Mike Frysinger [mailto:[email protected]] >Sent: Thursday, December 17, 2009 6:11 PM >To: Cai, Cliff >Cc: Bryan Wu; [email protected] >Subject: Re: MUSB root hub support > >On Wed, Dec 16, 2009 at 22:48, Cai, Cliff wrote: >>From: Mike Frysinger [mailto:[email protected]] >>>svn rev 1610 added support for root hub: >>>http://blackfin.uclinux.org/gf/project/u-boot/scmsvn/?action=br >>>owse&path=%2F&view=rev&revision=1610 >>> >>>any info on what this is and why it's needed ? i didnt >think we could >>>support hubs. >> >> We need to support hub control function called by up level,which >> provides something like HUB descriptor,and some port operations like >> reset. >> This is called virtual hub on musb. > >so if the MUSB hardware does support multipoint, then we >shouldnt enable the virtual roothub code ? it only makes >sense on devices like the Blackfin where hubs arent supported >in hardware ? >-mike >
IMHO, roothub control function is necessary for the integrality of usb driver framework at least. Cliff _______________________________________________ U-Boot-devel mailing list [email protected] https://blackfin.uclinux.org/mailman/listinfo/u-boot-devel
