Re: [coreboot] Baytrail MMC ACPI mode

[Ben Gardner]

I fixed ACPI mode for two other devices (LPE & LPSS).
It looks like the change for eMMC would be similar.
https://review.coreboot.org/#/c/14042/
https://review.coreboot.org/#/c/14041/

On Thu, Aug 11, 2016 at 12:12 PM, Matt DeVillier 
wrote:
> HI Alex,
>
> assuming you are using the 'baytrail_fsp' SoC, you might take a look at
> the 'baytrail' soc used by the Baytrail Google ChromeOS devices.  All of
> them use the eMMC in ACPI mode, and the SoC code for doing so might need to
> be added to the baytrail_fsp SoC if not already present (or at least give
> you a starting point to investigate)
>
> cheers,
> Matt
>
> On Thu, Aug 11, 2016 at 2:00 AM, Zoran Stojsavljevic <
> [e-mail]> wrote:
> > Hello/Privet Alex,
> >
> > I'll try to help you, since I am not too much familiar with the eMMC
> > drivers in Coreboot. I bet there are none, but there must be BCT support as
> > you outlined it: *"Enable PCI mode for SCC devices"
> > (PcdSccEnablePciMode)"*.
> >
> > I never tried to set eMMC on BayTrail on Coreboot (in fact, I never tried
> > BayTrail with Coreboot, but I did try others' companies Coreboot images on
> > once upon a time BayleyBay Fab.3 E3826 (dual Core) CRB). But I did try all
> > of (and more) what you are writing here with various INTEL and AMI BIOSes.
> > It is off topic.
> >
> > Here is what I did try on some other customized platform, using E3845 B3
> > and D0 steppings, and AMI BIOS. This is how I did setup with South Bridge,
> > SCC controller:
> >
> > [image: Inline image 1]
> >
> > Indeed, I was able to install Linux on eMMC (it was eMMC 5.0 compliant,
> > 32GB size, paired with BYT-I as written above, which supports up to eMMC
> > 4.51), namely Fedora 21 (if I recall correctly), and it worked seamlessly.
> >
> > I admit, I never tried WIN, but I do know that there are special INTEL
> > drivers developed for embedded WIN (for WEC 7 and WEC 2013). I am not sure
> > if such amenities exist for WES 7 (indirectly for WIN 7), you should check
> > these yourself: http://www.intel.com/content/www/us/en/embedded/pr
> > oducts/bay-trail/software-and-drivers.html
> >
> > Maybe you can find some WIN eMMC driver support on this site. At least I
> > hope. Hope dies last. ;-)
> >
> > Hope this helps/nadejus6 eto pomozet,
> > Zoran
> >
> > On Tue, Aug 9, 2016 at 11:10 AM, szr  wrote:
> > > Hello.
> > >
> > > I have the board with Intel Baytrail E3845 and eMMC card v4.41, use
> > > coreboot 4.4, seabios 1.9.1. In PCI mode eMMC work, I can install and boot
> > > Ubuntu. The problem in Windows 8/10, which see card as "removable" disk,
> > > and therefore, do not allow to install on it.
> > >
> > > Excuse me, I have the simple question. How switch the MMC controller to
> > > ACPI mode? If set "Enable PCI mode for SCC devices" (PcdSccEnablePciMode) =
> > > Disabled in BCT, a controller be lost in lspci, but system no detect a ACPI
> > > device (checked in Ubuntu).
> > >
> > > I would be grateful for any help.
> > >
> > > Thanks,
> > > Alex.