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diff --git a/Documentation/mainboard/lenovo/t440p.md b/Documentation/mainboard/lenovo/t440p.md new file mode 100644 index 0000000000..98c1da54ac --- /dev/null +++ b/Documentation/mainboard/lenovo/t440p.md @@ -0,0 +1,66 @@ +# Lenovo ThinkPad T440p + +This page describes how to run coreboot on [Lenovo ThinkPad T440p]. + +## Required proprietary blobs + +Please see [mrc.bin](../../northbridge/intel/haswell/mrc.bin). + +## Flashing instructions + +T440p has two flash chips, an 8MB W25Q64FV and a 4MB W25Q32FV. To flash +coreboot, you just need to remove the big door according to the T440 +[Hardware Maintenance Manual] and flash the 4MB chip. + + + +To access the 8MB chip, you need to remove the base cover. + + + +The flash layout of the OEM firmware is as follows: + + 00000000:00000fff fd + 00001000:00002fff gbe + 00003000:004fffff me + 00500000:00bfffff bios + +After flashing coreboot, you may need to re-plug the AC adapter to make +the laptop able to power on. + +## Known Issues + +- No audio output when using a headphone +- The touchpad is misconfigured, the 3 keys on top are all identified + as left button +- Cannot get the mainboard serial number from the mainboard: the OEM + UEFI firmware gets the serial number from an "emulated EEPROM" via + I/O port 0x1630/0x1634, but it's still unknown how to make it work + +## Untested + +- the dGPU model + +## Working + +- boot Arch Linux with Linux 4.19.77 from SeaBIOS payload +- integrated graphics init with libgfxinit +- EHCI debug: the port is the non-charging USB2 port on the right +- video output: internal (eDP), miniDP, dock DP, dock HDMI +- ACPI support +- keyboard and trackpoint +- SATA +- M.2 SATA SSD +- USB +- Ethernet +- WLAN +- WWAN +- bluetooth +- virtualization: VT-x and VT-d +- dock +- CMOS options: wlan, trackpoint, fn_ctrl_swap +- internal flashing when IFD is unlocked +- using `me_cleaner` + +[Lenovo ThinkPad T440p]: https://pcsupport.lenovo.com/us/zh/products/laptops-and-netbooks/thinkpad-t-series-laptops/thinkpad-t440p +[Hardware Maintenance Manual]: https://download.lenovo.com/ibmdl/pub/pc/pccbbs/mobiles_pdf/t440p_hmm_en_sp40a25467_04.pdf diff --git a/Documentation/mainboard/lenovo/t440p_all_flash_chips.jpg b/Documentation/mainboard/lenovo/t440p_all_flash_chips.jpg Binary files differnew file mode 100644 index 0000000000..cab80f21c5 --- /dev/null +++ b/Documentation/mainboard/lenovo/t440p_all_flash_chips.jpg diff --git a/Documentation/mainboard/lenovo/t440p_flash_chip.jpg b/Documentation/mainboard/lenovo/t440p_flash_chip.jpg Binary files differnew file mode 100644 index 0000000000..3e041e8d15 --- /dev/null +++ b/Documentation/mainboard/lenovo/t440p_flash_chip.jpg |
