012ef7735d
The code is based on autoport and that for T430s Tested: - CPU i5-3337U - Slotted DIMM 2GiB - Soldered RAM 4GiB from samsung (There may be more models here) - Camera - pci-e and usb2 on M.2 slot with A key for wlan - sata and usb2 (no superspeed components) on M.2 slot with B key for wwan - On board SDHCI connected to pci-e - USB3 ports - libgfxinit-based graphic init - NVRAM options for North and South bridges - Sound - Thinkpad EC - S3 - TPM1 on LPC - EHCI debug on SSP2 (USB3 port on the left) - Linux 4.9.110-3 within Debian GNU/Linux stable, loaded from Linux payload (Heads), Seabios may also work. Not tested: - Fingerprint reader on USB2 (not present on mine) - Keyboard backlight (not present on mine) - "sticky_fn" flag in nvram Not implemented yet: - Fn locking in nvram (may not be identical to "sticky_fn") - C-based native graphic init (since T431s has eDP instead of LVDS) - Detecting the model of Soldered RAM at runtime, and loading the corresponding SPD datum (3 observed) from CBFS (the mechanism may be similar to that on x1_carbon_gen1 and s230u, but I do not know how to find gpio ports for that, and SPD data stored in vendor firmware.) Change-Id: Ic8062cacf5e8232405bb5757e1b1d063541f354a Signed-off-by: Bill XIE <persmule@gmail.com> Reviewed-on: https://review.coreboot.org/c/30021 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Patrick Rudolph <siro@das-labor.org>
1.4 KiB
Lenovo T431s
Disassembly Instructions
You must remove the following parts before flipping the mainboard off the main frame:
- Base cover
- Hard disk drive
- Battery pack
- Keyboard
Its Hardware Maintenance Manual could be used as a guidance of disassembly.
The WSON-8 flash chip (surrounded with red circle in the photo above) sits on the opposite side of the mainboard, under a piece of insulating tape. If solders between the chip and soldering pads fortunately overflows beside the chip as tiny tin balls attached to soldering pads, it will be possible to use a pomona 5250 clip to hold the chip, with its metal tips just attached to tin balls, thus connecting the chip to the programmer.
:doc:`../../flash_tutorial/ext_power`
Currently, detecting the model of soldered RAM at runtime and loading the corresponding SPD datum from CBFS is not implemented yet. You may have to dump the SPD data when running the vendor firmware with inteltool, and replace the content of the SPD hex with what is dumped.
(the mechanism may be similar to that on x1_carbon_gen1 and s230u, but I do not know how to find gpio ports for that, and SPD data stored in vendor firmware.)