Board:lenovo/t520: Difference between revisions
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(Created page with "== Status == Issues: * no MRC cache (longer boot time) * yellow USB port isn't powered in power-off state. * S3 (Suspend to RAM) - system switch off * discrete GPU * display...") |
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== proprietary components status == | == proprietary components status == | ||
* CPU Microcode | * CPU Microcode | ||
* VGA option | * VGA option ROM (optional): you need it if you want graphics in SeaBIOS but most payloads should work without it (text mode or corebootfb mode) | ||
* ME(Management Engine) => you do not have to touch it(just leave it where it is) | * 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) | * GbE(Gigabit Ethernet embedded mac) => you do not have to touch it(just leave it where it is) | ||
| Line 50: | Line 50: | ||
== Flashing == | == Flashing == | ||
T520 has a ST | T520 has a ST / numonyx M25PX64VG 8 MiB flash chip in a VDFPN8 package. | ||
Next to the flash chip is a connector solder place "J100" where it is connected to. | Next to the flash chip is a connector solder place "J100" where it is connected to. | ||
Revision as of 09:39, 22 August 2014
Status
Issues:
- no MRC cache (longer boot time)
- yellow USB port isn't powered in power-off state.
- S3 (Suspend to RAM) - system switch off
- discrete GPU
- display port connected to discrete GPU
- native RAM init fails training
Tested:
- ultraabay sata
- RAM module combinations of 4G+0, 0+4G
- USB ports
- Video (both internal and VGA)
- Expresscard slot (including hotplugging)
- LAN
- mini-PCIe slot WLAN
- Linux (through SeaBIOS-as-payload)
- trackpoint
Not tested:
- firewire
- eSATA
- msata/ usb wwan slot
- SD card slot
- Sound (integrated speakers, integrated mic, external headphones, external mic)
- Thermal management
- Fingerprint reader
- Webcam
- touchpad
- Fn hotkeys
- Thinklight
- bluetooth
- dock
- msata
proprietary components status
- CPU Microcode
- VGA option ROM (optional): you need it if you want graphics in SeaBIOS but most payloads should work without it (text mode or corebootfb mode)
- 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)
Code
- The code has been merged into coreboot master
$ git clone http://review.coreboot.org/p/coreboot
Flashing
T520 has a ST / numonyx M25PX64VG 8 MiB flash chip in a VDFPN8 package.
Next to the flash chip is a connector solder place "J100" where it is connected to.
1 N/C 2 N/C 3 /CS 4 VCC 5 MISO 6 /HOLD 7 /WP 8 CLK 9 GND 10 MOSI
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).