Felix Singer d55fa332d8 Documentation: Move firmware flashing tutorial to tutorial section

There is no need that the tutorial for flashing firmware has its own
point in the main menu. Thus, move it to the tutorial section.

Change-Id: Ife6d97254af4c006fe01480a78c76303f9cb34bb
Signed-off-by: Felix Singer <felixsinger@posteo.net>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/62424
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Thomas Heijligen <src@posteo.de>

2022-03-11 19:56:22 +00:00

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Lenovo T420

Flashing instructions

The flash IC is located at the bottom center of the mainboard. Sadly, access to the IC is blocked by the magnesum frame, so you need to disassemble the entire laptop and remove the mainboard.

Below is a picture of IC on the mainboard, with the pinouts labeled.

The chip will either be a Macronix MX25L6404E (shown above) or a Winbond W25Q64CVSIG. Do not rely on dots painted in the corner of the chip (such as the blue dot pictured) to orient the pins!

For more details have a look at T420 / T520 / X220 / T420s / W520 common and the general flashing tutorial.

Steps to access the flash IC are described here T4xx series.

Working

CPU: Sandy Bridge i5-2520M, i7-2670QM
RAM module combinations of 2G+0, 2G+2G, 4G+0
mSATA
USB
Video (Intel integrated)
Sound (integrated speakers, integrated mic, external headphones, external mic)
LAN
Mini-PCIe slots (WLAN)
Bluetooth
Linux
Windows 10 (through SeaBIOS as payload, using a VGA BIOS)
DVD-ROM drive
SD card slot
TrackPoint
Touchpad
Webcam
Fn hotkeys (backlight control, thinklight)
Thinklight
Mute button (Speaker only)
Mini Jack audio (headphones)
Suspend (Linux)

Not tested

DSub (VGA) out
DisplayPort out
eSATA
ExpressCard
WWAN

Not working/TODOs

Mutemic button doesn't mute
Suspend (Windows 10)

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