Kvaser leaf light

Kvaser leaf light

[Ralph Potztal]

Hi there, 

I'm trying hard to setup the Kvaser Leaf Light HS v2 with SocketCan on a Ubuntu 14.04.2 workstation. Unfortunately I failed so far and therefor wanted to ask you, if you can give me some help.

My goal is to use the leaf together with wireshark to spy a can bus in one of our automated test systems.

How I'm trying to set it up:
- loading kernel modules:
# modprobe can
# modprobe can_raw
# modprobe can_bcm
# modprobe kvaser_usb
# modprobe vcan

- plug the leaf

- check if the leaf is there:
# lsusb
Bus 001 Device 002: ID 0bfd:0120 Kvaser AB

-trying to set up the ip link:
# ip link set up can0
Cannot find device "can0"
# ip link show
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN mode DEFAULT group default
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP mode DEFAULT group default qlen 1000
    link/ether 00:22:68:3a:5f:03 brd ff:ff:ff:ff:ff:ff

This is where I fail, I cannot get a device can0 to set up. It works perfectly fine with the vcan virtual device, but not with the leaf.

Do you have any idea what I'm missing or doing wrong. Your help would be highly appreciated.

Btw: The leaf firmware is up to date. 

Many thanks and best regards,

Ralph


end


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Re: Kvaser leaf light

[Ahmed S. Darwish]

Hi Ralph,

On Thu, Mar 19, 2015 at 03:32:48PM +0100, Ralph Potztal wrote:
> 
> Hi there, 
> 
> I'm trying hard to setup the Kvaser Leaf Light HS v2 with SocketCan on a Ubuntu 14.04.2 workstation. Unfortunately I failed so far and therefor wanted to ask you, if you can give me some help.
> 
> My goal is to use the leaf together with wireshark to spy a can bus in one of our automated test systems.
> 
> How I'm trying to set it up:
> - loading kernel modules:
> # modprobe can
> # modprobe can_raw
> # modprobe can_bcm
> # modprobe kvaser_usb
> # modprobe vcan
> 
> - plug the leaf
> 
> - check if the leaf is there:
> # lsusb
> Bus 001 Device 002: ID 0bfd:0120 Kvaser AB
> 

Great, this USB device ID (288/0x120) is indeed supported by the
kvaser_usb module. It was added only in linux-3.16 though:

    https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=b4f20130a

So, what is version of your kernel? A `uname -a' would be
quite helpful.

Thanks,
Darwish

Re: Kvaser leaf light

[Ralph Potztal]

Hi Ahmed, 

thanks for this. I think that could be the problem, because:

# uname -a
Linux cli-48 3.13.0-46-generic #79-Ubuntu SMP Tue Mar 10 20:06:50 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux

Best regards, 
Ralph

----- Ursprüngliche Mail -----
Von: "Ahmed S. Darwish" <darwish.07@gmail.com>
An: "Ralph Potztal" <ralph.potztal@espros.com>
CC: linux-can@vger.kernel.org
Gesendet: Donnerstag, 19. März 2015 16:31:52
Betreff: Re: Kvaser leaf light

Hi Ralph,

On Thu, Mar 19, 2015 at 03:32:48PM +0100, Ralph Potztal wrote:
> 
> Hi there, 
> 
> I'm trying hard to setup the Kvaser Leaf Light HS v2 with SocketCan on a Ubuntu 14.04.2 workstation. Unfortunately I failed so far and therefor wanted to ask you, if you can give me some help.
> 
> My goal is to use the leaf together with wireshark to spy a can bus in one of our automated test systems.
> 
> How I'm trying to set it up:
> - loading kernel modules:
> # modprobe can
> # modprobe can_raw
> # modprobe can_bcm
> # modprobe kvaser_usb
> # modprobe vcan
> 
> - plug the leaf
> 
> - check if the leaf is there:
> # lsusb
> Bus 001 Device 002: ID 0bfd:0120 Kvaser AB
> 

Great, this USB device ID (288/0x120) is indeed supported by the
kvaser_usb module. It was added only in linux-3.16 though:

    https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=b4f20130a

So, what is version of your kernel? A `uname -a' would be
quite helpful.

Thanks,
Darwish


--- Disclaimer: --- 
This email and contents is for use only by the intended recipient. If you are not the individual or entity to whom it is addressed, you are hereby formally notified that any use, copying or distribution of this email and attachments, in whole or in part, is strictly prohibited. If you have received this email in error, please notify the sender and delete the message and attachment(s) from your system. Any views, opinions or information, expressed or contained in this email, are those of the sender and not necessarily reflect those of ESPROS Photonics AG. To help protect our environment, please avoid printing out this information unnecessarily.

Re: Kvaser leaf light

[Ahmed S. Darwish]

Hi Ralph,

[ Please do not top-post; it heavily breaks our ability to follow
  the logical sequence of a discussion thread. More details here:
  http://catb.org/jargon/html/T/top-post.html
  https://lkml.org/lkml/2005/1/11/111 ]

On Fri, Mar 20, 2015 at 05:28:21AM +0100, Ralph Potztal wrote:
> 
> Hi Ahmed, 
> 
> thanks for this. I think that could be the problem, because:
> 
> # uname -a
> Linux cli-48 3.13.0-46-generic #79-Ubuntu SMP Tue Mar 10 20:06:50 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux
> 

Great we've found the culprit. Now you have multiple possible
solutions:

1) Latest Ubuntu 14.04 LTS seems to offer a 3.16 kernel in a nicely
   packaged "sudo apt-get install" format:
   http://askubuntu.com/questions/506956/how-can-i-install-3-16-kernel-on-ubuntu-14-04

2) Manually install the latest 3.19.2 stable kernel, which includes
   support for your Kvaser model.

Keep in mind though that the kvaser_usb module has recently received
a large amount of fixes that's not yet included in the latest stable
kernels. So if you will use the device for continuous hours or plan
to have a heavy tx/rx traffic, you will definitely have to do one of
the following instead:

1) Temporarily use the 3.19.2 kernel, and quickly switch to v4.0
   once it is released. Better yet, directly use kernel v4.0-rc4
   where most of the necessary fixes are included:

   https://lkml.org/lkml/2015/3/15/180

2) I have a version of the driver at work, __with all the fixes__,
   ported for old Ubuntu and CentOS kernels. 

   I can upload this version on a public website and send you the
   link on Sunday. But kindly note that this will be providied "AS IS",
   without any kind of support (you can *not* bother this mailing list
   about it), or any warranty of merchantability, implied or express.

3) At least port this single patche to your 3.19.2 kernel:

   [a] can: kvaser_usb: Read all messages in a bulk-in URB buffer
   http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=2fec5104f9c

Regards,
Darwish

> 
> ----- Ursprüngliche Mail -----
> Von: "Ahmed S. Darwish" <darwish.07@gmail.com>
> An: "Ralph Potztal" <ralph.potztal@espros.com>
> 
> Hi Ralph,
> 
> On Thu, Mar 19, 2015 at 03:32:48PM +0100, Ralph Potztal wrote:
> > 
> > Hi there, 
> > 
> > I'm trying hard to setup the Kvaser Leaf Light HS v2 with SocketCan on a Ubuntu 14.04.2 workstation. Unfortunately I failed so far and therefor wanted to ask you, if you can give me some help.
> > 
> > My goal is to use the leaf together with wireshark to spy a can bus in one of our automated test systems.
> > 
> > How I'm trying to set it up:
> > - loading kernel modules:
> > # modprobe can
> > # modprobe can_raw
> > # modprobe can_bcm
> > # modprobe kvaser_usb
> > # modprobe vcan
> > 
> > - plug the leaf
> > 
> > - check if the leaf is there:
> > # lsusb
> > Bus 001 Device 002: ID 0bfd:0120 Kvaser AB
> > 
> 
> Great, this USB device ID (288/0x120) is indeed supported by the
> kvaser_usb module. It was added only in linux-3.16 though:
> 
>     https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=b4f20130a
> 
> So, what is version of your kernel? A `uname -a' would be
> quite helpful.
> 
> Thanks,
> Darwish
> 

Re: Kvaser leaf light

[Ahmed S. Darwish]

Hi Ralph,

On Fri, Mar 20, 2015 at 01:00:34PM +0200, Ahmed S. Darwish wrote:
> On Fri, Mar 20, 2015 at 12:18 PM, Ralph Potztal <ralph.potztal@espros.com>
> >
> > $ uname -a
> >
> >   Linux cli-46 3.19.0-031900-generic #201502091451 SMP Mon Feb 9
> >   14:52:52 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux
> >
> > It's working excellent now.
> >
>
> Great. Switch to upcoming v4.0 if you notice any disruptions
> in your CAN traffic. I shall send backported fixes soon.
> 

Backported fixes for v3.19, and other -stable kernels, are now
ready:

    http://article.gmane.org/gmane.linux.can/7857
    http://article.gmane.org/gmane.linux.can/7860
    http://article.gmane.org/gmane.linux.can/7859

Append /raw to the URLs above to get the patches in a form
that can be applied with "patch" or "git am".

Regards,
Darwish