Board:lenovo/t520

Status

Intel_Native_Raminit has it's own status page.

Device/functionality	Status	Comments
CPU
CPU works	OK	Support both Sandy Bridge and Ivy Bridge
L1 cache enabled	OK	Always on
L2 cache enabled	OK	Always on
L3 cache enabled	N/A
Multiple CPU support	N/A
Multi-core support	OK
Hardware virtualization	OK
RAM
EDO	N/A
SDRAM	N/A
SO-DIMM	N/A
DDR	N/A
DDR2	N/A
DDR3	OK	Native
Dual channel support	OK
ECC support	N/A
On-board Hardware
On-board IDE 3.5"	N/A
On-board IDE 2.5"	N/A
On-board SATA	OK
On-board SCSI	N/A
On-board USB	OK
On-board VGA	OK
On-board Ethernet	OK
On-board Audio	OK	integrated speakers, integrated mic, external headphones, external mic
On-board Modem	N/A
On-board FireWire	Untested
On-board Smartcard reader	N/A
On-board CompactFlash	N/A
On-board PCMCIA	OK
On-board Wifi	OK
On-board Bluetooth	OK
On-board SD card reader	N/A
Add-on slots/cards
ISA add-on cards	N/A
Audio/Modem-Riser (AMR/CNR) cards	N/A
PCI add-on cards	N/A
Mini-PCI add-on cards	N/A
PCI-X add-on cards	N/A
AGP graphics cards	N/A
PCI Express x1 add-on cards	N/A
PCI Express x2 add-on cards	N/A
PCI Express x4 add-on cards	N/A
PCI Express x8 add-on cards	N/A
PCI Express x16 add-on cards	OK
PCI Express x32 add-on cards	N/A
HTX add-on cards	N/A
Legacy / Super I/O
Floppy	N/A
Serial port 1 (COM1)	N/A
Serial port 2 (COM2)	N/A
Parallel port	N/A
PS/2 keyboard	N/A
PS/2 mouse	N/A
Game port	N/A
Infrared	N/A
PC speaker	OK
DiskOnChip	N/A
Input
Trackpoint	OK
Touchpad	OK
Fn Hotkeys	OK
Fingerprint Reader	OK
Laptop
Docking VGA	OK
Docking LAN	OK
Docking USB	OK
Docking Audio	OK
Docking Displayport	OK
Thinklight	OK
Webcam	OK
Miscellaneous
Sensors / fan control	OK
Hardware watchdog	OK
SMBus	OK
CAN bus	N/A
CPU frequency scaling	OK
Other powersaving features	N/A
ACPI	Untested
Reboot	OK
Poweroff	OK
Suspend	OK	Suspend to RAM
Nonstandard LEDs	N/A
High precision event timers (HPET)	Untested
Random number generator (RNG)	Untested
Wake on modem ring	N/A
Wake on LAN	Untested
Wake on keyboard	Untested
Wake on mouse	Untested
Flashrom	OK	ST/numonyx M25PX64VG 8 MiB VDFPN8 package.

Issues

• yellow USB port isn't powered in power-off state.
• DisplayPort only connected to Discrete GPU
• TPM. At the moment there is only basic support inside coreboot...
• Boot time issues ( keyboard rest timeout )
• ultrabay hot plug (event missing?)
• some power management states missing

Tested OS

• Linux (through SeaBIOS-as-payload and GRUB-as-payload)
• Windows (version>=7, through SeaBIOS as payload with proprietary VGA BIOS)

Proprietary Components Status

• CPU Microcode
• FDT(Flash Descriptor Table) => Always needed
• ME(Management Engine) => you do not have to touch it(just leave it where it is)
• GbE(Gigabit Ethernet embedded mac) => you do not have to touch it(just leave it where it is)

Building Firmware

Please have a look at Intel_Sandybridge_Build_Tutorial.

Flashing

T520 has a ST / numonyx M25PX64VG 8 MiB flash chip in a VDFPN8 package or a Winbond W25Q64.V 8MiB flash chip in a SOIC-8 package.

All Battery's and the Power-supply must be disconnected before flashing.

Next to the flash chip is a connector solder place "J100" where it is connected to.

-------- side to the screen     --------
NC  VCC  HOLD  CLK  MOSI
NC  CS    MISO  WP    GND
-------- side to the palm rest -------- 

We can see that the connector is very similar to an SOIC-8 flash pinout.

VCC     -- 8 --+-+-- 1 -- CS
HOLD  -- 7 --+ +-- 2 -- MISO
CLK     -- 6 --+ +-- 3 -- WP
MOSI  -- 5 --+-+-- 4 -- GND

Here are two picture showing the J100 solder place and a connector soldered to it.

Flash layout: FLREG0: 0x00000000

 Flash Region 0 (Flash Descriptor): 00000000 - 00000fff 

FLREG1: 0x07ff0500

 Flash Region 1 (BIOS): 00500000 - 007fffff 

FLREG2: 0x04ff0003

 Flash Region 2 (Intel ME): 00003000 - 004fffff 

FLREG3: 0x00020001

 Flash Region 3 (GbE): 00001000 - 00002fff 

FLREG4: 0x00000fff

 Flash Region 4 (Platform Data): 00fff000 - 00000fff (unused)

Vendor firmware locks the flash and so you need to flash externally (unless until someone figures out a way around it).