The wiki is being retired!
Documentation is now handled by the same processes we use for code: Add something to the Documentation/ directory in the coreboot repo, and it will be rendered to https://doc.coreboot.org/. Contributions welcome!
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
|L1 cache enabled||OK||Always on|
|L2 cache enabled||OK||Always on|
|L3 cache enabled||N/A|
|Multiple CPU support||N/A|
|Dual channel support||N/A|
|On-board IDE 3.5"||N/A|
|On-board IDE 2.5"||N/A|
|On-board VGA||OK||BIOS/console: works.|
|On-board Audio||OK||Basic two channel audio works fine.|
|On-board Smartcard reader||N/A|
|On-board SD card reader||N/A|
|ISA add-on cards||N/A|
|Audio/Modem-Riser (AMR/CNR) cards||N/A|
|PCI add-on cards||OK|
|Mini-PCI add-on cards||N/A|
|Mini-PCI-Express add-on cards||Unknown|
|PCI-X add-on cards||N/A|
|AGP graphics cards||N/A|
|PCI Express x1 add-on cards||OK|
|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||N/A|
|PCI Express x32 add-on cards||N/A|
|HTX add-on cards||N/A|
|Legacy / Super I/O|
|Serial port 1 (COM1)||N/A|
|Serial port 2 (COM2)||N/A|
|Sensors / fan control||OK|
|Hardware watchdog||Pending||What needs to be done here??|
|CPU frequency scaling||OK|
|Other powersaving features||N/A|
|ACPI||WIP||Mostly working, needs a good Review!|
|High precision event timers (HPET)||OK|
|Random number generator (RNG)||OK|
|Wake on modem ring||N/A|
|Wake on LAN||Untested|
|Wake on keyboard||Untested|
|Wake on mouse||Untested|
|Flashrom||OK||MXIC MX25L3206E 4MB SPI Flash|
Proprietary components status
- CPU Microcode (optional)
- 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