linux-kernel - Re: [PATCH v13 2/5] usb: renesas-xhci: Add the renesas xhci driver

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Message-ID: <CAAd0S9AEOsOLrnry4xNRVOi5fXwm3KXYzQsUMCm9tVxHr2sr1w@mail.gmail.com>
Date:   Tue, 19 May 2020 22:19:03 +0200
From:   Christian Lamparter <chunkeey@...il.com>
To:     Heikki Krogerus <heikki.krogerus@...ux.intel.com>
Cc:     Vinod Koul <vkoul@...nel.org>,
        Mathias Nyman <mathias.nyman@...el.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        linux-arm-msm@...r.kernel.org,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Yoshihiro Shimoda <yoshihiro.shimoda.uh@...esas.com>,
        John Stultz <john.stultz@...aro.org>,
        Alan Stern <stern@...land.harvard.edu>,
        Andreas Böhler <dev@...ehler.at>,
        USB list <linux-usb@...r.kernel.org>,
        linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v13 2/5] usb: renesas-xhci: Add the renesas xhci driver

Hello,

On Tue, May 19, 2020 at 1:45 PM Heikki Krogerus
<heikki.krogerus@...ux.intel.com> wrote:
> On Wed, May 06, 2020 at 11:30:22AM +0530, Vinod Koul wrote:
> > From: Christian Lamparter <chunkeey@...glemail.com>
> >
> > This add a new driver for renesas xhci which is basically a firmware
> > loader for uPD720201 and uPD720202 w/o ROM. The xhci-pci driver will
> > invoke this driver for loading/unloading on relevant devices.
> >
> > This patch adds a firmware loader for the uPD720201K8-711-BAC-A
> > and uPD720202K8-711-BAA-A variant. Both of these chips are listed
> > in Renesas' R19UH0078EJ0500 Rev.5.00 "User's Manual: Hardware" as
> > devices which need the firmware loader on page 2 in order to
> > work as they "do not support the External ROM".
> >
> > The "Firmware Download Sequence" is describe in chapter
> > "7.1 FW Download Interface" R19UH0078EJ0500 Rev.5.00 page 131.
> >
> > The firmware "K2013080.mem" is available from a USB3.0 Host to
> > PCIe Adapter (PP2U-E card) "Firmware download" archive. An
> > alternative version can be sourced from Netgear's WNDR4700 GPL
> > archives.
> >
> > The release notes of the PP2U-E's "Firmware Download" ver 2.0.1.3
> > (2012-06-15) state that the firmware is for the following devices:
> >  - uPD720201 ES 2.0 sample whose revision ID is 2.
> >  - uPD720201 ES 2.1 sample & CS sample & Mass product, ID is 3.
> >  - uPD720202 ES 2.0 sample & CS sample & Mass product, ID is 2.
>
> You wouldn't happen to have access to the documentation of the
> "original" uPD720200 USB 3.0 controller?
>
> It would be cool if we could support that too with this driver.

???. I have one of those "original" uPD720200(A) working "just fine"
in my Laptop currently.
It's an really old HP dv6-6003eg from around 2011 that came with two
USB 3.0 Ports, which
are driven by a "NEC Corporation uPD720200 USB 3.0 Host Controller"
1033:0194 (Rev 04).

As for supporting the uPD720200 (flasher) with this serises.... There
are some bad news:

"In addition, the programming interface for the uPD720200 and uPD720200A
is different from the uPD720202, needs different programming tools, and relies
on proprietary chip features that cannot be disclosed outside of Renesas."
<https://mail.coreboot.org/pipermail/flashrom/2013-February/010498.html> :-(

Regards,
Christian