Configuration CAN sja1000_isa

Configuration CAN sja1000_isa

[cedric koch-hofer]

Hello all,

I am currently trying to use the CAN output of an Aaeon embedded
system using sja1000 CAN chipset controler.
I am using an Ubuntu with a kernel 3.0 and I do not succeed to change
the state of my can device from down to up.
As you can see in the following trace, all seems to work untill I try
to activate my CAN network interface.
After that, the interface is in state "UNKNOWN" and I can not use it
with the socketcan tools: cansend, candump, cansniffer...

Any idea will be welcome,
thanks in advance,
cedric.

Re: Configuration CAN sja1000_isa

[Wolfgang Grandegger]

On 04/26/2012 09:35 AM, cedric koch-hofer wrote:
> Hello all,
> 
> I am currently trying to use the CAN output of an Aaeon embedded
> system using sja1000 CAN chipset controler.
> I am using an Ubuntu with a kernel 3.0 and I do not succeed to change
> the state of my can device from down to up.
> As you can see in the following trace, all seems to work untill I try
> to activate my CAN network interface.
> After that, the interface is in state "UNKNOWN" and I can not use it
> with the socketcan tools: cansend, candump, cansniffer...
> 
> Any idea will be welcome,

That's wired. Does it work with "ifconfig can0 up"?

Wolfgang.

Re: Configuration CAN sja1000_isa

[cedric koch-hofer]

It is wired and you can see the trace that I forget to include in my
previous mail 8-)

-- TRACE BEGIN --

09:08 root@snowsat-945GS/root
[1002] > modprobe sja1000_isa "mem=0xda000,0xda200"  "irq=1,2"
09:08 root@snowsat-945GS/root
[1003] > dmesg
[  651.408826] CAN device driver interface
[  651.411377] sja1000 CAN netdevice driver
[  651.421680] sja1000_isa sja1000_isa.0: sja1000_isa device
registered (reg_base=0xc00da000, irq=1)
[  651.427146] sja1000_isa sja1000_isa.1: sja1000_isa device
registered (reg_base=0xc00da200, irq=2)
[  651.428286] Legacy sja1000_isa driver for max. 8 devices registered
09:08 root@snowsat-945GS/root
[1004] > ip link set can0 type can bitrate 125000
09:12 root@snowsat-945GS/root
[1005] > dmesg
[  651.408826] CAN device driver interface
[  651.411377] sja1000 CAN netdevice driver
[  651.421680] sja1000_isa sja1000_isa.0: sja1000_isa device
registered (reg_base=0xc00da000, irq=1)
[  651.427146] sja1000_isa sja1000_isa.1: sja1000_isa device
registered (reg_base=0xc00da200, irq=2)
[  651.428286] Legacy sja1000_isa driver for max. 8 devices registered
[  863.738418] sja1000_isa sja1000_isa.0: setting BTR0=0x03 BTR1=0x1c
09:12 root@snowsat-945GS/root
[1006] >  ip -details link show can0
5: can0: <NOARP,ECHO> mtu 16 qdisc noop state DOWN qlen 10
   link/can
   can state STOPPED (berr-counter tx 0 rx 0) restart-ms 0
   bitrate 125000 sample-point 0.875
   tq 500 prop-seg 6 phase-seg1 7 phase-seg2 2 sjw 1
   sja1000: tseg1 1..16 tseg2 1..8 sjw 1..4 brp 1..64 brp-inc 1
   clock 8000000
09:13 root@snowsat-945GS/root
[1007] > ip link set can0 up type can
09:13 root@snowsat-945GS/root
[1008] >  ip -details link show can0
5: can0: <NOARP,UP,LOWER_UP,ECHO> mtu 16 qdisc pfifo_fast state UNKNOWN qlen 10
   link/can
   can state ERROR-ACTIVE (berr-counter tx 0 rx 0) restart-ms 0
   bitrate 125000 sample-point 0.875
   tq 500 prop-seg 6 phase-seg1 7 phase-seg2 2 sjw 1
   sja1000: tseg1 1..16 tseg2 1..8 sjw 1..4 brp 1..64 brp-inc 1
   clock 8000000
09:13 root@snowsat-945GS/root
[1009] > dmesg
[  651.408826] CAN device driver interface
[  651.411377] sja1000 CAN netdevice driver
[  651.421680] sja1000_isa sja1000_isa.0: sja1000_isa device
registered (reg_base=0xc00da000, irq=1)
[  651.427146] sja1000_isa sja1000_isa.1: sja1000_isa device
registered (reg_base=0xc00da200, irq=2)
[  651.428286] Legacy sja1000_isa driver for max. 8 devices registered
[  863.738418] sja1000_isa sja1000_isa.0: setting BTR0=0x03 BTR1=0x1c

-- TRACE END --

On Thu, Apr 26, 2012 at 10:03 AM, Wolfgang Grandegger <wg@grandegger.com> wrote:
> On 04/26/2012 09:35 AM, cedric koch-hofer wrote:
>> Hello all,
>>
>> I am currently trying to use the CAN output of an Aaeon embedded
>> system using sja1000 CAN chipset controler.
>> I am using an Ubuntu with a kernel 3.0 and I do not succeed to change
>> the state of my can device from down to up.
>> As you can see in the following trace, all seems to work untill I try
>> to activate my CAN network interface.
>> After that, the interface is in state "UNKNOWN" and I can not use it
>> with the socketcan tools: cansend, candump, cansniffer...
>>
>> Any idea will be welcome,
>
> That's wired. Does it work with "ifconfig can0 up"?
>
> Wolfgang.
>
>

Re: Configuration CAN sja1000_isa

[Wolfgang Grandegger]

On 04/26/2012 10:17 AM, cedric koch-hofer wrote:
> It is wired and you can see the trace that I forget to include in my
> previous mail 8-)

I already saw the trace on the Socket-CAN ml. But you did not answer my
question:

 "Does it work with "ifconfig can0 up"?"

Wolfgang.

Re: Configuration CAN sja1000_isa

[Wolfgang Grandegger]

On 04/26/2012 10:17 AM, cedric koch-hofer wrote:
> On Thu, Apr 26, 2012 at 10:03 AM, Wolfgang Grandegger <wg@grandegger.com> wrote:
>> > On 04/26/2012 09:35 AM, cedric koch-hofer wrote:
>>> >> Hello all,
>>> >>
>>> >> I am currently trying to use the CAN output of an Aaeon embedded
>>> >> system using sja1000 CAN chipset controler.
>>> >> I am using an Ubuntu with a kernel 3.0 and I do not succeed to change
>>> >> the state of my can device from down to up.
>>> >> As you can see in the following trace, all seems to work untill I try
>>> >> to activate my CAN network interface.
>>> >> After that, the interface is in state "UNKNOWN" and I can not use it
>>> >> with the socketcan tools: cansend, candump, cansniffer...
>>> >>
>>> >> Any idea will be welcome,
>> >
>> > That's wired. Does it work with "ifconfig can0 up"?

OK. it's the same with ifconfig. Hm, I have no idea. Looks like some
mismatch between the tools and the kernel. Some questions:

- What UBUNTU and kernel version do you use?
- Do you use the CAN drivers from that kernel?
- Could you try a more recent kernel?

Wolfgang.