Looking to get Coreboot working on Jasper Lake / N5105 mini PC with 4x Intel 2.5Gbit NICs

[Marcos Scriven]

(This is a second attempt at posting - not heard back from mods, but so far as I can tell I'm a subscribe of this mail group)

Hello all

I'd like to get Coreboot working on a new target device, so I'll follow the 6 steps in the https://www.coreboot.org/FAQ section entitled "Will coreboot work on my machine?" It looks like someone emailed the mailing list about this back in November '22: https://mail.coreboot.org/hyperkitty/list/[e-mail]/thread/I5HFQ..., but if I'm reading the archive correctly, didn't get any responses.

Step 1: A very brief description of your system: board vendor, board name, CPU, northbridge, southbridge, and optionally other important details.

Board Vendor: Board is branded Topton, but the board is from CWWK. CWWK mentions this board on one of their firmware update pages https://www.changwang.com/down/74.html
Board Name: MW-JSL2.5G4L
CPU: N5105
North Bridge Intel Jasper Lake Host Bridge rev 00
South Bridge Intel Jasper Lake PCH rev 01

• Step 2: Linux "*lspci -tvnn*" output for your system, generated by booting Linux via the original BIOS and runnning lspci.

-[0000:00]-+-00.0  Intel Corporation Device [8086:4e24]
           +-02.0  Intel Corporation Device [8086:4e61]
           +-04.0  Intel Corporation Device [8086:4e03]
           +-14.0  Intel Corporation Device [8086:4ded]
           +-14.2  Intel Corporation Device [8086:4def]
           +-15.0  Intel Corporation Device [8086:4de8]
           +-15.2  Intel Corporation Device [8086:4dea]
           +-16.0  Intel Corporation Device [8086:4de0]
           +-17.0  Intel Corporation Device [8086:4dd3]
           +-19.0  Intel Corporation Device [8086:4dc5]
           +-19.1  Intel Corporation Device [8086:4dc6]
           +-1c.0-[01]----00.0  Phison Electronics Corporation E12 NVMe Controller [1987:5012]
           +-1c.4-[02]----00.0  Intel Corporation Ethernet Controller I225-V [8086:15f3]
           +-1c.5-[03]----00.0  Intel Corporation Ethernet Controller I225-V [8086:15f3]
           +-1c.6-[04]----00.0  Intel Corporation Ethernet Controller I225-V [8086:15f3]
           +-1c.7-[05]----00.0  Intel Corporation Ethernet Controller I225-V [8086:15f3]
           +-1e.0  Intel Corporation Device [8086:4da8]
           +-1e.3  Intel Corporation Device [8086:4dab]
           +-1f.0  Intel Corporation Device [8086:4d87]
           +-1f.3  Intel Corporation Device [8086:4dc8]
           +-1f.4  Intel Corporation Device [8086:4da3]
           -1f.5  Intel Corporation Device [8086:4da4]

• Step 3: Super I/O chip on the mainboard (report the model numbers on the actual chip, for example "Winbond W83627HF" and/or run "*superiotool https://www.coreboot.org/Superiotool -dV*").

Output of superiotool -dV (minus all the probing/failed):

Found ITE IT8613E (id=0x8613, rev=0xc) at 0x2e
Register dump:
idx 20 21 22 23 24 2b
val 86 13 0c 40 00 48
def 86 13 05 40 00 48
LDN 0x01 (COM1)
idx 30 60 61 70 f0
val 01 03 f8 04 01
def 00 03 f8 04 00
LDN 0x04 (Environment controller)
idx 30 60 61 62 63 70 f0 f1  f2 f3 f4 f5 f6 fa fb fc
val 01 0a 30 0a 20 00 80 00  00 00 20 00 f0 00 00 00
def 00 02 90 02 30 09 00 00  00 00 00 NA NA 00 00 00
LDN 0x05 (Keyboard)
idx 30 60 61 62 63 70 71 f0
val 00 00 60 00 64 01 02 48
def 01 00 60 00 64 01 02 48
LDN 0x06 (Mouse)
idx 30 70 71 f0
val 00 0c 02 00
def 00 0c 02 00
LDN 0x07 (GPIO)
idx 25 26 27 28 29 2a 2c 2d  60 61 62 63 70 71 72 73  74 b0 b1 b2 b3 b4 b8 ba  bb bc bd c0 c1 c2 c3 c4  c8 c9 ca cb cc cd da db  e0 e1 e2 e3 e4 ec f0 f1  f2 f3 f4 f5 f6 f7 f8 f9  fa fb
val 00 f7 80 08 d1 00 41 02  0a 10 0a 00 00 01 00 00  00 00 00 00 00 00 00 00  00 c0 03 01 06 80 48 90  00 00 00 00 00 00 b0 44  00 00 00 00 00 00 00 00  00 00 00 00 0e 00 00 00  00 00
def 00 f3 00 00 00 01 01 00  00 00 00 00 00 00 20 38  00 00 00 00 00 00 00 00  00 00 00 01 00 00 40 00  01 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  NA NA 00 00 0e 00 00 00  00 00
LDN 0x0a (Consumer IR)
idx 30 60 61 70 f0
val 00 03 10 0b 06
def 00 03 10 0b 06

• Step 4: Type of BIOS device (see the question "How do I identify the BIOS chip on my mainboard?" below). Please send us the output of "*flashrom http://flashrom.org/ -p internal -V*"

Direct inspection shows 8-pin 16MB w25q128jv, however, flashrom doesn't seem to include that in the list of Winbond chips it probes for. dmidecode says it's an 8MB ROM, so not sure why the discrepancy

• Step 5: URL to the mainboard specifications page (optional).

Topton (branded) https://www.aliexpress.com/item/1005004374464011.html
Can't find official specs, but there's a pho

• Step 6: Any other relevant information you can provide.

There's a photo of the board on the left of this BIOS update page https://www-changwang-com.translate.goog/down/74.html?_x_tr_sl=zh-CN&_x_...

I've been Googling both "Jasperlake coreboot" and "n5105 coreboot".

I see there was news of starting to support this back in January 2020 https://www.phoronix.com/news/Coreboot-JSP-TGL-Razer-ICL

Looking at some Coreboot commits, I see a "jasperlake-rvp" target was added, so I simply tried it out.

It seems to build fine, but with two warnings:

** WARNING **
ADD_FSP_BINARIES isn't selected even though this SoC relies on the FSP.
The resulting image won't contain the FSP binaries and will not boot unless
they are added later.

** WARNING **
coreboot has been built without an Intel Firmware Descriptor.
Never write a complete coreboot.rom without an IFD to your
board's flash chip! You can use flashrom's IFD or layout
parameters to flash only to the BIOS region.

The first warning seems to suggest I can't ignore is (as it won't boot). I thus went looking for an FSP bin for this chip.

Unfortunately it doesn't seem to be in the official Intel Github repo, and there's an unanswered issue there looking for it https://github.com/intel/FSP/issues/74

I hope that provides the necessary info to make a start!

Thanks

Marcos