CanFD ：Operation not supported

[L-SY]

I designed a PCB board based on your open-source design and flashed the candleLightFD.bin firmware onto it.
When I plug it into my Ubuntu system, it recognizes the CAN device:

ip -details link show can0
12: can0: <NOARP,ECHO> mtu 16 qdisc noop state DOWN mode DEFAULT group default qlen 10
    link/can  promiscuity 0 minmtu 0 maxmtu 0 
    can state STOPPED restart-ms 0 
	  bitrate 1000000 sample-point 0.750 
	  tq 25 prop-seg 14 phase-seg1 15 phase-seg2 10 sjw 1
	  gs_usb: tseg1 1..256 tseg2 1..128 sjw 1..128 brp 1..512 brp-inc 1
	  clock 40000000 numtxqueues 1 numrxqueues 1 gso_max_size 65536 gso_max_segs 65535

but I am unable to use CAN FD. I encounter the error RTNETLINK answers:

Operation not supported when running sudo ip link set can0 up type can bitrate 1000000 dbitrate 1000000 fd on.
RTNETLINK answers: Operation not supported

How to solve this err
Looking forward to hearing from you！

[FuzzyPt233]

Hi there! Can you please share the 'candleLightFD.bin' to me to test on my board? I do not have the develop environment on Linux so that haven't test my board.

[SmithChart]

Hi @FuzzyPt233 ,

Hi there! Can you please share the 'candleLightFD.bin' to me to test on my board? I do not have the develop environment on Linux so that haven't test my board.

we are currently shipping a fork of the upstream. We are working on mainlining - but that is still ongoing.
I've added links and the binary to our product page here:
https://linux-automation.com/en/products/candlelight-fd.html

[SmithChart]

Hi @L-SY,

I designed a PCB board based on your open-source design and flashed the candleLightFD.bin firmware onto it. When I plug it into my Ubuntu system, it recognizes the CAN device:

ip -details link show can0
12: can0: <NOARP,ECHO> mtu 16 qdisc noop state DOWN mode DEFAULT group default qlen 10
    link/can  promiscuity 0 minmtu 0 maxmtu 0 
    can state STOPPED restart-ms 0 
	  bitrate 1000000 sample-point 0.750 
	  tq 25 prop-seg 14 phase-seg1 15 phase-seg2 10 sjw 1
	  gs_usb: tseg1 1..256 tseg2 1..128 sjw 1..128 brp 1..512 brp-inc 1
	  clock 40000000 numtxqueues 1 numrxqueues 1 gso_max_size 65536 gso_max_segs 65535

but I am unable to use CAN FD. I encounter the error RTNETLINK answers:

Operation not supported when running sudo ip link set can0 up type can bitrate 1000000 dbitrate 1000000 fd on.
RTNETLINK answers: Operation not supported

How to solve this err Looking forward to hearing from you！

I am sorry. I must have missed your issue. Which firmware binary did you use? Did you compile from source? Based on which commit? What Linux version are you on?

[ascitegong]

I encounterred the same issue, with the same hw design, flashed candlelightFD firmware, Device recognized as CAN, not CANFD.

$ sudo ip -details link show can1
228: can1: <NOARP,ECHO> mtu 16 qdisc pfifo_fast state DOWN mode DEFAULT group default qlen 10
    link/can  promiscuity 0 minmtu 0 maxmtu 0
    can state STOPPED restart-ms 100
          bitrate 500000 sample-point 0.875
          tq 25 prop-seg 34 phase-seg1 35 phase-seg2 10 sjw 1
          gs_usb: tseg1 1..256 tseg2 1..128 sjw 1..128 brp 1..512 brp-inc 1
          clock 40000000 numtxqueues 1 numrxqueues 1 gso_max_size 65536 gso_max_segs 65535

$ sudo ip link set can1 up type can bitrate 500000 dbitrate 2000000 fd on
RTNETLINK answers: Operation not supported

I'm using Ubuntu20.04, with kernel 5.15.
BTW, the device was correctly recognized as candlelightFD

$ lsusb
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 066: ID 1d50:606f OpenMoko, Inc. candleLightFD gs_usb
Bus 001 Device 067: ID 0c72:0012 PEAK System PCAN-USB FD
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

The firmware I'm using is this one: https://linux-automation.com/firmware/candleLightFD_fw_8d3e7fa_2023-07-20.bin

[ascitegong]

I encounterred the same issue, with the same hw design, flashed candlelightFD firmware, Device recognized as CAN, not CANFD.

$ sudo ip -details link show can1
228: can1: <NOARP,ECHO> mtu 16 qdisc pfifo_fast state DOWN mode DEFAULT group default qlen 10
    link/can  promiscuity 0 minmtu 0 maxmtu 0
    can state STOPPED restart-ms 100
          bitrate 500000 sample-point 0.875
          tq 25 prop-seg 34 phase-seg1 35 phase-seg2 10 sjw 1
          gs_usb: tseg1 1..256 tseg2 1..128 sjw 1..128 brp 1..512 brp-inc 1
          clock 40000000 numtxqueues 1 numrxqueues 1 gso_max_size 65536 gso_max_segs 65535

$ sudo ip link set can1 up type can bitrate 500000 dbitrate 2000000 fd on
RTNETLINK answers: Operation not supported

I'm using Ubuntu20.04, with kernel 5.15. BTW, the device was correctly recognized as candlelightFD

$ lsusb
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 066: ID 1d50:606f OpenMoko, Inc. candleLightFD gs_usb
Bus 001 Device 067: ID 0c72:0012 PEAK System PCAN-USB FD
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

The firmware I'm using is this one: https://linux-automation.com/firmware/candleLightFD_fw_8d3e7fa_2023-07-20.bin

Problem resolved by upgrading Linux kernel. Kernel version should be >= 5.18