Re: [coreboot] Baytrail SD card interface

[Marc Jones]

Wen,

The emmc device can be set to PCI mode or ACPI mode. If you can't find
it in lspci, it is probably in ACPI mode. I'm not certain what mode
the FSP sets up the device as.

Marc

On Thu, Aug 7, 2014 at 11:43 AM, Wen Wang  wrote:
> Thanks Martin! We probably missed something in the muxing setting. Looking
> forward to your patch.
>
> By the way, I also have started looking into the eMMC4.5. I do  have it
> enabled in fsp and device tree, but it does not seem to work. lspci does not
> list eMMC device either. Is it currently supported in coreboot? -  should I
> start a new thread on this topic?
>
> Thanks,
>
> Wen
>
> -----Original Message-----
> From: Martin Roth [mailto:[e-mail]]
> Sent: Thursday, August 7, 2014 11:08 AM
> To: Wen Wang; 'Julien Snell'; [e-mail]
> Subject: Re: [coreboot] Baytrail SD card interface
>
> Wen,
>      I'll push a patch for the muxing - I'd been meaning to do this and just
> got behind.
>
> I don't believe that SeaBIOS yet supports boot from SD (without a USB
> translator).  Sage pushed a preliminary patch supporting SD boot on specific
> platforms to the SeaBIOS mailing list a while back, but I don't believe that
> worked on Bay Trail, and I don't believe that any additional work has been
> done on the patches since then.
>
> The thread starts here:
> http://www.coreboot.org/pipermail/seabios/2014-June/008105.html
>
> Here's a link to the patch:
> http://www.seabios.org/pipermail/seabios/attachments/20140611/32c1a351/attac
> hment-0001.gz
>
> Hi Julien,
>    Were those boards using Bay Trail and booting coreboot / SeaBIOS?
> I'm assuming you just meant that SD boot works in general.
>
> Martin
>
> On 08/07/2014 08:16 AM, Wen Wang wrote:
> > Julien,
> >
> > Thanks much for the information!  We must have missed something.  For
> > SD card, we have SD enabled in fsp, and the GPIO mux configured in
> > coreboot. Is there anything else we need to do?  Did you have to do
>
> anything in seabios?
> > Thanks,
> >
> > Wen
> >
> > -----Original Message-----
> > From: Julien Snell [mailto:[e-mail]]
> > Sent: Thursday, August 7, 2014 3:34 AM
> > To: Wen Wang; [e-mail]
> > Subject: Re: [coreboot] Baytrail SD card interface
> >
> > Wen,
> >
> > SD Card , SD Card Boot work. We have designed several Boards with SD
> > Card Boot.
> > Although I would recommend USB3 Boot as it's a magnitude faster.
> >
> > Regards
> > Julien Snell
> > Cocom
> > www.cc-e.co.uk
> >
> > Cocom design and manufacture internet connected devices (IoT)
> > Introducing two new brands Mi-ProtoPCB, UK made lightning fast
> > assembled PCB proto-types and Mi-Embedded, your very own customised
>
> embedded board.
> > -----Original Message-----
> > From: coreboot [mailto:[e-mail]] On Behalf Of Wen
> > Wang
> > Sent: 06 August 2014 20:45
> > To: [e-mail]
> > Subject: [coreboot] Baytrail SD card interface
> >
> > Hello all,
> >
> > Does the current baytrail fsp coreboot code support SD/uSD card interface?
> > Is anybody able to get it to work on Bayley Bay CRB? It does not seem
> > to work on our CRB. We checked the SD3_PWREN signal, it always remains
> > high and therefore the SD card doesn't get any power.
> >
> > Thanks,
> >
> > Wen