tree 815d59845ef468db4884ec2bdd214315fb33d522
parent 1036e760d852f224265c677806089278c77ff5b2
author Al Cooper <alcooperx@gmail.com> 1589295618 -0400
committer Greg Kroah-Hartman <gregkh@linuxfoundation.org> 1589372881 +0200

usb: ehci: Add new EHCI driver for Broadcom STB SoC's

Add a new EHCI driver for Broadcom STB SoC's. A new EHCI driver
was created instead of adding support to the existing ehci platform
driver because of the code required to work around bugs in the EHCI
controller. The primary workaround is for a bug where the Core
violates the SOF interval between the first two SOFs transmitted after
resume. This only happens if the resume occurs near the end of a
microframe. The fix is to intercept the ehci-hcd request to complete
RESUME and align it to the start of the next microframe.

Signed-off-by: Al Cooper <alcooperx@gmail.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Link: https://lore.kernel.org/r/20200512150019.25903-5-alcooperx@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>