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Date: Tue, 10 Dec 2013 09:01:52 +0100
From: Wolfgang Grandegger <wg@grandegger.com>
In-Reply-To: <000001cef515$c786ed70$5694c850$@hs-augsburg.de>
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Message-ID: <bb483f27032aa36db668e1ebedda5bf9@grandegger.com>
Subject: Re: [Xenomai] rtdm can on mpc5121e - no rtcan devices detected
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To: Andreas Gareis <andreas.gareis@hs-augsburg.de>
Cc: xenomai@xenomai.org

On Mon, 9 Dec 2013 20:35:12 +0100, "Andreas Gareis"

<andreas.gareis@hs-augsburg.de> wrote:

> Von: Wolfgang Grandegger

>  Gesendet: Montag, 9. Dezember 2013 20:10

>> 

>> On Mon, 9 Dec 2013 19:17:47 +0100, "Andreas Gareis"

>> <andreas.gareis@hs-augsburg.de> wrote:

>> > Von: Tom Evans

>> >  Gesendet: Sonntag, 8. Dezember 2013 23:07

>> >>

>> >> Did the CAN devices work before you installed Xenomai? Get them

>> >> working there first.

>> >>

>> >

>> > Yes, the CAN devices worked before Xenomai installation. They were

>> > shown in 

>> > ifconfig and communication with other CAN-devices was possible.

>> >

>> > When I select normal (non rt) CAN-support and xenomai kernel (without

>> > RT-CAN) in the kernelconfig, working CAN devices are also available.

>> >

>> > Now I want to use RT-CAN with xenomai. So, I activated

"RT-Socket-CAN"

>> > and "MSCAN driver for MPC52xx and MPC512x" in the kernelconfig.

>> > When "normal" CAN support (Networking support => CAN bus

>> >  subsystem support => CAN Device Drivers Freescale MPC5xxx

>> > onboard CAN controller) is disabled, the xenomai module

>> > "xeno_can_mscan.ko" isn't able to start. When "normal" CAN support

>> 

>> That's the real problem. What happen's if you want to start the CAN

>> device?

>  

> First I call "insmod xeno_can.ko". dmesg shows:

>     RT-Socket-CAN 0.90.2 - (C) 2006 RT-Socket-CAN Development Team

> 

> Then I call "insmod xeno_can_mscan.ko".

> This operation gets stuck (the insmod doesn't return). 

> In dmesg there are no messages. 

> lsmod shows that xeno_can is running and xeno_can_mscan is still

loading.



Add some pr_info/printk to the drivers probe function to see where it

hangs.



Wolfgang.