Maccraft 0cd098e4e4 mb/lenovo/{t60,r60}: Add ThinkPad R60 support as variant board

- This port should be Reclaim Your Freedom compliant
  (not certified yet).
- Untested on boards with external Radeon graphics adapter.
- Some columns on the left-most side of display are completely
  black on 1400x1050 IPS display[1]. Display works fine on Linux.
  I don't know why it appears like that. So far it has been observed
  only with native graphics initialization.
- Only GRUB2 and SeaBIOS payloads tested for now.
- 2504 docking station USB doesn't work under Linux.
  Can detect pendrive in GRUB2 payload.
- Sometimes it takes 20s of "pretending it's powered off" to run
  coreboot code. Issue is payload agnostic.
  Probably caused by missing one capacitor on my unit.

[1] https://imgur.com/a/0wpMGsm

Change-Id: Ibd9208a5eafd228f8eedbc8fb4f4eb9ed1932a14
Signed-off-by: Maciej Matuszczyk <maccraft123mc@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/35864
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>

2019-10-25 20:07:16 +00:00

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Lenovo Thinkpad R60

Untested on boards with external Radeon graphics adapter. If you have such board, proceed at your own risk and document if it does work.

Flashing instructions

External flashing

The flash IC is located at the bottom center of the mainboard. Access to the flash chip is blocked by the magnesium frame, so you need to disassemble the entire laptop and remove the mainboard. The flash chip is referenced as U49 in the schematics and in the boardview.

To disassemble the laptop, follow the Hardware Maintenance Manual.

Internal flashing on Vendor BIOS

This method describes a way to install coreboot with vendor firmware still installed on the Lenovo Thinkpad X60. It is reported to also work in Thinkpad R60, with the only difference being the board target you build coreboot for.

Flashing on coreboot

Default configuration of coreboot doesn't feature any flash restrictions like the vendor firmware, therefore flashrom is able to flash any rom without problems.

Things tested and working in Linux 5.3:

Intel WiFi card
Suspend and resume
Native graphics initialization. Both legacy VGA and linear framebuffer work
GRUB2 2.04 and SeaBIOS 1.12.1 payloads
Reflashing with flashrom (use flashrom-git as of 17.09.2019)
2G+1G memory configuration working
2504 dock USB ports if not hotplugged

Things tested and not working:

2504 dock hotplugging
Black bar at the left side of the screen. Doesn't appear in Linux. See picture at top
Sometimes it takes several second to run coreboot. Just wait for it

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