Difference between revisions of "Board:lenovo/t530"
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== Status ==
== Status ==
Revision as of 17:43, 13 September 2014
The machine has:
- Chipset: Intel QM77 - GPU's: Intel Integrated HD Graphics : Discrete NVIDIA NVS 5400M (1 GB VRAM) with Optimus Technology
and pci configuration of:
-[0000:00]-+-00.0 8086:0154 +-02.0 8086:0166 +-16.0 8086:1e3a +-19.0 8086:1502 +-1a.0 8086:1e2d +-1b.0 8086:1e20 +-1c.0-----00.0 1180:e823 +-1c.1-----00.0 8086:4238 +-1c.2-[04-0b]-- +-1d.0 8086:1e26 +-1f.0 8086:1e55 +-1f.2 8086:1e03 \-1f.3 8086:1e22
Thanks for your interest in Lenovo T530 port. Issues:
- EHCI output failure after sysagent
- no S3
- no MRC cache
- MRC needs watchdog
- yellow USB port isn't powered in power-off state.
(Tested on X230 *not tested* on the T530):
- RAM module combinations of 8G+8G
- USB (both 2.0 and 3.0 ports)
- Video (both internal and VGA)
- Expresscard slot (including hotplugging)
- Sound (integrated speakers, integrated mic, external headphones, external mic)
- mini-PCIe slots (both wlan and wwan)
- Linux (through GRUB-as-payload)
- Windows (through GRUB-as-payload loading SeaBIOS image from disk; you have to use extracted VGA blob, dumped from memory isn't good enough)
- SD card slot
- Thermal management
- Fingerprint reader.
- Keyboard backlight
- msata (fixed in commit c8f54a1109072706e2fa091dc9ab4ad3eb057b42)
- mini displayport (probably works)
Proprietary components status
- CPU Microcode (optional)
- VGA option rom
- ME(Management Engine) => you do not have to touch it(just leave it where it is)
- EC(Embedded Controller) => you do not have to touch it(just leave it where it is)
This information should not be considered reliable in any way, shape or form
- GPIO57 - OUT - controls..
General Purpose Events layout
- GPE? - EC SCI
- GPE? - EC SMI
T530 has 2 flash chips of 8M and 4M. They're concatenated to one virtual flash chip of 12M which is itself subdivided in roughly in 4 parts:
- Descriptor (12K)
- ME firmware (5M-12K)
- System flash (7M)
ME firmware is not readable. Vendor firmware locks the flash and so you need to flash externally (unless until someone figures out a way around it).
Proceeds as follows:
- Turn off your laptop, remove battery and AC adapter.
- Remove the keyboard.
- Connect your external SPI flasher to the top SPI chip which is under palm resting space, on left side of the board. It's a 4M chip. IF you've chosen CBFS_SIZE 4M or smaller that's the only chip you need to reflash.
I recommend using SOIC clip. Depending on the flasher you use, you may have to use separate 3.3V source. Make sure not to feed more than 3.3V ot the chip. I used buspirate as flasher and 3.3V power lines from another computer.
- Read the flash. Twice. Compare the files to be sure. Save a copy of it on
flashrom -p <yourprogrammer> -r flash.bin flashrom -p <yourprogrammer> -r flash2.bin diff flash.bin flash2.bin
If they don't match, do not proceed. If the file is 8M, you're flashing wrong chip, connect to the right one.
- Write the flash. Since you have to write only top 4M, first split out those 4M:
dd of=top.rom bs=1M if=build/coreboot.rom skip=8
- Use flashrom to flash top.rom.
If you have trouble reading the chip successfully, the most common problems are
- insufficient power supply
- bad contacts
- too long wires
- bad pinout
The cable shipped with buspirate was too long, and needed to be trimmed.
See also In-System Programming