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>
42 lines
1.4 KiB
Markdown
42 lines
1.4 KiB
Markdown
# Lenovo T431s
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## Disassembly Instructions
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You must remove the following parts before flipping the mainboard
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off the main frame:
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* Base cover
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* Hard disk drive
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* Battery pack
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* Keyboard
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Its [Hardware Maintenance Manual](https://thinkpads.com/support/hmm/hmm_pdf/t431s_hmm_en_0c10894_02.pdf) could be used as a guidance of disassembly.
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The WSON-8 flash chip (surrounded with red circle in the photo above)
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sits on the opposite side of the mainboard, under a piece of insulating
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tape. If solders between the chip and soldering pads fortunately
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overflows beside the chip as tiny tin balls attached to soldering pads,
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it will be possible to use a pomona 5250 clip to hold the chip, with
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its metal tips just attached to tin balls, thus connecting the chip to
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the programmer.
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```eval_rst
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:doc:`../../flash_tutorial/ext_power`
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```
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Currently, detecting the model of soldered RAM at runtime and loading
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the corresponding SPD datum from CBFS is not implemented yet. You may
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have to dump the SPD data when running the vendor firmware with
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inteltool, and replace the content of the SPD hex with what is dumped.
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(the mechanism may be similar to that on x1_carbon_gen1 and s230u, but
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I do not know how to find gpio ports for that, and SPD data stored in
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vendor firmware.)
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[T420 / T520 / X220 / T420s / W520 common]: xx20_series.md
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