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Any idea what /dev/bcmfpga is?


Fiddling around with the Hummy in mantenance mode, I notice something that's no doubt ben there right form the start:

humax3# ls /dev
bcmfpga              mtdblock1            nexus_transport      sdb4                 sdf7
brcm0                mtdblock10           nexus_uart           sdb5                 sdf8
Any idea what the bcmfpga device is? Did Humax really put an FPGA somewhere in there?

Black Hole

May contain traces of nut
Likely it's something inside the Broadcom SoC, used to customise the data routing or even implement some of the functionality - such as codec support. "BCM" is a common abbreviation for Broadcom. As such, no Humax didn't put it in there explicitly, it came as part of the package.


Active Member
The /dev/bcmfpga device doesn't appear to be referenced in the Humax blob.

No FPGA is explicitly mentioned in the BCM7405 product information, although the "Broadcom Security Processor" subsystem features a "One-Time Programmable Non-Volatile Memory".

In this schematic for the "BCM97405 AVC/MPEG/VC-1 HD/SD, Graphics, Digital PVR, IP/Satellite/DVB-C,T Set Top Box" reference design, there's a Transport Test FPGA (p28), that connects to the PKT5 digital video input of the SoC. All in all, probably not part of the shipped Humax designs.