libreboot/x220

swiftgeek said that GbE needs to be removed and disabled while ME is running
08:06:49     @swiftgeek | PHY_PCIE_EN=0b000 PHY_PCIEPORTSEL=0b000 

https://puri.sm/posts/neutralizing-intel-management-engine-on-librem-laptops/
yeah, they're slimebags, but this is actually a pretty good article

./blobtool -d ifd-x200.spec your-real-sandy-descriptor.bin out.set
that will decompile your sandy IFD assuming it has same layout as a X200

some x220 have wson according to swiftfeek
M25PX64 this flash chip
system rescue cd
or linux mint usb
get your supplier to run flashrom -p internal on one of those
or alpine linux live

17:54:00          felix_ | leah: the usb3 chip used in the i7 variant of the x220 is a uPD720200 or a uPD720200A and both
have updateable firmware; i wrote some still buggy and currently unpublished firmware updater for
it


this is for X201 descriptor (page 800)
http://www.intel.co.uk/content/dam/doc/datasheet/io-controller-hub-10-family-datasheet.pdf
TODO: get NVM datasheet for NIC

is x201 5 series or 6 series?
if 6 series, see datasheet for 6 series in lbdev
if 5 series, see datasheet linked above (pretty sure 5 series uses ich10)

leah | 7 series datasheet is correct for ivybridge (thinkpad x230 then)
6 series is for sandybridge (thinkpad x220)

__________

ME region:
http://www.slideshare.net/codeblue_jp/igor-skochinsky-enpub

descriptor:
check "spi programming guide" in lbdev directory, for intel 6 series
17:21:43           felix_ | leah: x220 is 6 series (qm67) with me7, x230 7 series (qm77) with me8

04:44:21             _x00 | $ lspci | nc termbin.com 9999                                                                    │ cantstanya
04:44:21             _x00 | http://termbin.com/os8g 
00:00.0 Host bridge: Intel Corporation 2nd Generation Core Processor Family DRAM Controller (rev 09)
00:02.0 VGA compatible controller: Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller (rev 09)
00:04.0 Signal processing controller: Intel Corporation Device 0103 (rev 09)
00:19.0 Ethernet controller: Intel Corporation 82579LM Gigabit Network Connection (rev 05)
00:1a.0 USB controller: Intel Corporation 6 Series/C200 Series Chipset Family USB Enhanced Host Controller #2 (rev 05)
00:1b.0 Audio device: Intel Corporation 6 Series/C200 Series Chipset Family High Definition Audio Controller (rev 05)
00:1c.0 PCI bridge: Intel Corporation 6 Series/C200 Series Chipset Family PCI Express Root Port 1 (rev b5)
00:1c.1 PCI bridge: Intel Corporation 6 Series/C200 Series Chipset Family PCI Express Root Port 2 (rev b5)
00:1c.3 PCI bridge: Intel Corporation 6 Series/C200 Series Chipset Family PCI Express Root Port 4 (rev b5)
00:1c.4 PCI bridge: Intel Corporation 6 Series/C200 Series Chipset Family PCI Express Root Port 5 (rev b5)
00:1c.5 PCI bridge: Intel Corporation 6 Series/C200 Series Chipset Family PCI Express Root Port 7 (rev b5)
00:1d.0 USB controller: Intel Corporation 6 Series/C200 Series Chipset Family USB Enhanced Host Controller #1 (rev 05)
00:1f.0 ISA bridge: Intel Corporation QM67 Express Chipset Family LPC Controller (rev 05)
00:1f.2 SATA controller: Intel Corporation 6 Series/C200 Series Chipset Family 6 port SATA AHCI Controller (rev 05)
00:1f.3 SMBus: Intel Corporation 6 Series/C200 Series Chipset Family SMBus Controller (rev 05)
02:00.0 Network controller: Intel Corporation Centrino Advanced-N 6205 [Taylor Peak] (rev 34)
04:00.0 SD Host controller: Ricoh Co Ltd PCIe SDXC/MMC Host Controller (rev 07)

https://gist.github.com/sixtyfive/1071556
[muaddib@rih ~]$ sudo lspci 
00:00.0 Host bridge: Intel Corporation 2nd Generation Core Processor Family DRAM Controller (rev 09)
00:02.0 VGA compatible controller: Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller (rev 09)
00:16.0 Communication controller: Intel Corporation 6 Series Chipset Family MEI Controller #1 (rev 04)
00:19.0 Ethernet controller: Intel Corporation 82579LM Gigabit Network Connection (rev 04)
00:1a.0 USB Controller: Intel Corporation 6 Series Chipset Family USB Enhanced Host Controller #2 (rev 04)
00:1b.0 Audio device: Intel Corporation 6 Series Chipset Family High Definition Audio Controller (rev 04)
00:1c.0 PCI bridge: Intel Corporation 6 Series Chipset Family PCI Express Root Port 1 (rev b4)
00:1c.1 PCI bridge: Intel Corporation 6 Series Chipset Family PCI Express Root Port 2 (rev b4)
00:1c.4 PCI bridge: Intel Corporation 6 Series Chipset Family PCI Express Root Port 5 (rev b4)
00:1d.0 USB Controller: Intel Corporation 6 Series Chipset Family USB Enhanced Host Controller #1 (rev 04)
00:1f.0 ISA bridge: Intel Corporation 6 Series Chipset Family LPC Controller (rev 04)
00:1f.2 SATA controller: Intel Corporation 6 Series Chipset Family 6 port SATA AHCI Controller (rev 04)
00:1f.3 SMBus: Intel Corporation 6 Series Chipset Family SMBus Controller (rev 04)
03:00.0 Network controller: Intel Corporation Centrino Advanced-N 6205 (rev 34)
0d:00.0 System peripheral: Ricoh Co Ltd Device e823 (rev 04)

coreboot d09dc6b442415d3dd0753483e4d4d72ce26ce56e
this is a good known revision according to board status, for X220

gbe:

datasheet for nvm on nic for x220:
http://www.intel.com/content/dam/doc/datasheet/82579-gbe-phy-datasheet-vol-2-1.pdf
(I think. must check. this is based on lspci output from x220)

it documents some of the gbe region in there. you can verify that it's accurate when you get a gbe dump from an x220 factory image

flashrom has a tool called intel_descriptor_tool or flash_descriptor_tool or somoething like that
which I'm told also had code for the descriptor. it, and ifdtool, might be worth looking into at least.
___________

x200:
https://www.coreboot.org/pipermail/coreboot/2017-February/083202.html
and other boards
cmos.layout changed