[Buildroot] CANBUs Quesetion

[Buildroot] CANBUs Quesetion

[Ted Wood]

I have a  PCAN104 board, which is supplied with open source Linux drivers.

I have built my kernel with CAN support.

 

How do I incorporate the PCAN drivers into my Linux kernel build?

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[Buildroot] CANBUs Quesetion

[Thomas Petazzoni]

Dear Ted Wood,

On Fri, 11 Jan 2013 16:06:23 -0000, Ted Wood wrote:
> I have a  PCAN104 board, which is supplied with open source Linux drivers.
> 
> I have built my kernel with CAN support.
> 
> How do I incorporate the PCAN drivers into my Linux kernel build?

What is PCAN ? Is it a family of hardware ? Without more details, hard
to help you.

To see the CAN hardware drivers available in your kernel, go in:

	Networking support
	 -> CAN bus subsystem support
	    -> CAN Device Drivers

Best regards,

Thomas
-- 
Thomas Petazzoni, Free Electrons
Kernel, drivers, real-time and embedded Linux
development, consulting, training and support.
http://free-electrons.com

[Buildroot] CANBUs Quesetion

[Thomas Petazzoni]

On Fri, 11 Jan 2013 17:14:29 +0100, Thomas Petazzoni wrote:

> What is PCAN ? Is it a family of hardware ? Without more details, hard
> to help you.

Ok, after a bit of googling (I should also do my homework before
replying too fast), I guess you're talking about
http://www.phytec.com/products/can/pc-can-interfaces/peakusb.html.

So, it's known in the kernel as peak_usb, driver in
drivers/net/can/usb/peak_usb. Config option to enable is
CONFIG_CAN_PEAK_USB.

Thomas
-- 
Thomas Petazzoni, Free Electrons
Kernel, drivers, real-time and embedded Linux
development, consulting, training and support.
http://free-electrons.com

[Buildroot] CANBUs Quesetion

[Ted Wood]

OK. I'll rephrase my original question...


I have an  XXX CPU Board. I have fitted a YYY I/O board to it, which is
supplied with open source Linux drivers.
How do I incorporate the YYY drivers into my Linux kernel build?

[Buildroot] CANBUs Quesetion

[Thomas Petazzoni]

Dear Ted Wood,

On Mon, 14 Jan 2013 11:26:30 -0000, Ted Wood wrote:

> OK. I'll rephrase my original question...
> 
> I have an  XXX CPU Board. I have fitted a YYY I/O board to it, which is
> supplied with open source Linux drivers.
> How do I incorporate the YYY drivers into my Linux kernel build?

Depends on your definitions of XXX and YYY. But generally speaking, you
need to adjust your Linux kernel configuration. So, in the context of
Buildroot:

	make linux-menuconfig

See also
http://buildroot.org/downloads/manual/manual.html#kernel-custom.

Best regards,

Thomas
-- 
Thomas Petazzoni, Free Electrons
Kernel, drivers, real-time and embedded Linux
development, consulting, training and support.
http://free-electrons.com

[Buildroot] CANBUs Quesetion

[Yegor Yefremov]

On Mon, Jan 14, 2013 at 12:26 PM, Ted Wood <ted@fgh.co.uk> wrote:
> OK. I'll rephrase my original question...
>
>
> I have an  XXX CPU Board. I have fitted a YYY I/O board to it, which is
> supplied with open source Linux drivers.
> How do I incorporate the YYY drivers into my Linux kernel build?


Perhaps it is of any help to look here:
http://free-electrons.com/blog/buildroot-2011-11/

[Buildroot] CANBUs Quesetion

[Stephan Hoffmann]

Am 14.01.2013 12:26, schrieb Ted Wood:
> OK. I'll rephrase my original question...
>
>
> I have an  XXX CPU Board. I have fitted a YYY I/O board to it, which is
> supplied with open source Linux drivers.
> How do I incorporate the YYY drivers into my Linux kernel build?
Hello Ted,

I assume you are searching for help with a (possibly proprietary) driver
that is meant to be built outside the kernel tree. I dealt with such
things before I started to use buildroot.

Assuming that this driver comes with a Makefile I suggest to make a new
buildroot package on top of the driver's makefile. There is good
documentation for this in the buildroot manual.

If the driver is GPL another option might be to integrate it into your
kernel source and make a kernel patch out of it. But beware: Doing such
with a proprietary driver will brake the kernel license.

Hope this helps

Stephan
>
> _______________________________________________
> buildroot mailing list
> buildroot at busybox.net
> http://lists.busybox.net/mailman/listinfo/buildroot


-- 
reLinux     -    Stephan Hoffmann
Am Schmidtgrund 124    50765 K?ln
Tel. +49.221.95595-19    Fax: -64
www.reLinux.de     sho at reLinux.de

[Buildroot] CANBUs Quesetion

[Ted Wood]

> >If the driver is GPL another option might be to integrate it into your
> >kernel source and make a kernel patch out of it. 


Sorry, I failed to make the distinction between Open Source and GPL. 

The drivers are GPL. Could you point me at some information on how to do
this?

By the way, thanks for your patience.

[Buildroot] CANBUs Quesetion

[Thomas Petazzoni]

Dear Ted Wood,

On Mon, 14 Jan 2013 15:43:34 -0000, Ted Wood wrote:

> Sorry, I failed to make the distinction between Open Source and GPL. 
> 
> The drivers are GPL. Could you point me at some information on how to do
> this?

How to do what? Sorry but your question is far from being precise
enough to be understood.

So the best reference I have for now is
http://www.catb.org/esr/faqs/smart-questions.html#beprecise.

Best regards,

Thomas
-- 
Thomas Petazzoni, Free Electrons
Kernel, drivers, real-time and embedded Linux
development, consulting, training and support.
http://free-electrons.com

[Buildroot] CANBUs Quesetion

[Ted Wood]

> >How to do what? Sorry but your question is far from being precise
> >enough to be understood.

I'm really not sure how to make it any clearer than I did with my previous
post. My response to Stephan Hoffman's suggestion that I integrate the
driver into my kernel source and make a kernel patch out of it was to ask
where I might find information on this. There is nothing in the Buildroot
manual about it.

I'm not asking to be told how to do it, I'm asking for a pointer to where to
find the information. As someone new to Embedded Linux I've been struggling
to filter the huge volume of irrelevant and outdated material that Google
throws up.  

But thank you for the guide to asking questions. I shall bear it in mind in
future.

[Buildroot] CANBUs Quesetion

[Patrick]

On 01/15/2013 11:58 AM, Ted Wood wrote:
>>> How to do what? Sorry but your question is far from being precise
>>> enough to be understood.
>
> I'm really not sure how to make it any clearer than I did with my previous
> post. My response to Stephan Hoffman's suggestion that I integrate the
> driver into my kernel source and make a kernel patch out of it was to ask
> where I might find information on this. There is nothing in the Buildroot
> manual about it.
>
> I'm not asking to be told how to do it, I'm asking for a pointer to where to
> find the information. As someone new to Embedded Linux I've been struggling
> to filter the huge volume of irrelevant and outdated material that Google
> throws up.
>
> But thank you for the guide to asking questions. I shall bear it in mind in
> future.
>

A kernel module could be easily compiled out of the kernel. You should 
have a Makefile included with your driver. This Makefile will use the 
kernel Makefile to build, so you have to be sure that KDIR is pointing 
on the root directory of your kernel. If build with buildroot it should 
be something like buildroot/output/build/linux-x.y/

I will probably also need to set INSTALL_MOD_PATH to point on your rootfs.

But as suggested before if the driver is GPL you could add it directly 
in your kernel tree it would be cleaner.

Patrick

[Buildroot] CANBUs Quesetion

[Stephan Hoffmann]

Am 15.01.2013 11:58, schrieb Ted Wood:
>>> How to do what? Sorry but your question is far from being precise
>>> enough to be understood.
> I'm really not sure how to make it any clearer than I did with my previous
> post. My response to Stephan Hoffman's suggestion that I integrate the
> driver into my kernel source and make a kernel patch out of it was to ask
> where I might find information on this. There is nothing in the Buildroot
> manual about it.
Ted,

kernel hackng is not a part of buildroot's scope.

I do not know about a good tutorial or so.

Maybe you want to read "Linux Device Drivers"
http://shop.oreilly.com/product/9780596005900.do and/or the information
provided on http://www.kernel.org/ and http://kernelnewbies.org/.

If you look at the driver's source code it should become clear. If it
does not you might want to think whether paying for commercial
assistance might be cheaper than learning it all.

You could also provide a link to the driver's source code, maybe someone
wants to have a look at it and give you the hints you need.

Stephan
>
> I'm not asking to be told how to do it, I'm asking for a pointer to where to
> find the information. As someone new to Embedded Linux I've been struggling
> to filter the huge volume of irrelevant and outdated material that Google
> throws up.  
>
> But thank you for the guide to asking questions. I shall bear it in mind in
> future.
>
>
>
>
>
> _______________________________________________
> buildroot mailing list
> buildroot at busybox.net
> http://lists.busybox.net/mailman/listinfo/buildroot


-- 
reLinux     -    Stephan Hoffmann
Am Schmidtgrund 124    50765 K?ln
Tel. +49.221.95595-19    Fax: -64
www.reLinux.de     sho at reLinux.de

[Buildroot] CANBUs Quesetion

[Thomas Petazzoni]

Dear Ted Wood,

On Tue, 15 Jan 2013 10:58:39 -0000, Ted Wood wrote:

> I'm really not sure how to make it any clearer than I did with my
> previous post.

You can easily be more precise: just say which driver you are talking
about, where we can download the source code to have a look and make
you useful suggestions.

If it's an external kernel module, then you can have a look at the
lttng-modules, linux-fusion, igh-ethercat packages for some examples.
But the exact steps to do will depend on how the build system of your
driver has been written, which is why I'm asking to see the source code
for it.

Best regards,

Thomas
-- 
Thomas Petazzoni, Free Electrons
Kernel, drivers, real-time and embedded Linux
development, consulting, training and support.
http://free-electrons.com

[Buildroot] CANBUs Quesetion

[Grant Edwards]

On 2013-01-15, Ted Wood <ted@fgh.co.uk> wrote:
>> >How to do what? Sorry but your question is far from being precise
>> >enough to be understood.
>
> I'm really not sure how to make it any clearer than I did with my previous
> post.

Your previous post didn't include any context to indicate what task
you were asking about.

> My response to Stephan Hoffman's suggestion that I integrate the
> driver into my kernel source and make a kernel patch out of it

In many forums, it is expected that you would quote enough of Stephen
Hoffman's suggestion so that when you post the question "how do I do
that?", the post contains a referent for "that".  This obviates the
need for your gentle reader to sort through older posts and try to
figure out what you're asking.

When asking somebody for help with something, it is considered polite
to minimize the amount of effort required of them.

-- 
Grant Edwards               grant.b.edwards        Yow! Where's the Coke
                                  at               machine?  Tell me a joke!!
                              gmail.com            

[Buildroot] CANBUs Quesetion

[Grant Edwards]

On 2013-01-15, Grant Edwards <grant.b.edwards@gmail.com> wrote:
> On 2013-01-15, Ted Wood <ted@fgh.co.uk> wrote:
>>> >How to do what? Sorry but your question is far from being precise
>>> >enough to be understood.
>>
>> I'm really not sure how to make it any clearer than I did with my previous
>> post.
>
> Your previous post didn't include any context to indicate what task
> you were asking about.

Oops, my mistake -- I didn't see one line of quoted material.  It was
pretty clear that you were asking how to create a patch that would add
your driver.

-- 
Grant Edwards               grant.b.edwards        Yow! HAIR TONICS, please!!
                                  at               
                              gmail.com            

[Buildroot] CANBUs Quesetion

[Ted Wood]

> >Your previous post didn't include any context to indicate what task
> >you were asking about.


I'd have to disagree with you there Grant. If you look at my post (partially
quoted by Thomas) it actually quotes Stephan's words " If the driver is GPL
another option might be to integrate it into 
your kernel source and make a kernel patch out of it."

[Buildroot] CANBUs Quesetion

[Ted Wood]

No problem.

[Buildroot] CANBUs Quesetion

[Ted Wood]

> >
> >kernel hackng is not a part of buildroot's scope.
> >
> >I do not know about a good tutorial or so.
> >
> >Maybe you want to read "Linux Device Drivers"
> >http://shop.oreilly.com/product/9780596005900.do and/or the
> >information provided on http://www.kernel.org/ and
> >http://kernelnewbies.org/.
> >
> >If you look at the driver's source code it should become clear. If it
> >does not you might want to think whether paying for commercial
> >assistance might be cheaper than learning it all.
> >
> >You could also provide a link to the driver's source code, maybe
> >someone wants to have a look at it and give you the hints you need.
> >

Thanks Stephan. The links (especially kernelnewbies) look useful.

I have a copy of Linux Device Drivers open in front of me.

As for providing driver source code, I really wasn't expecting anyone to be
prepared to dig around in it. That's supposed to be my job.

But for what it's worth the source code is at: 

http://www.peak-system.com/fileadmin/media/linux/index.htm

[Buildroot] CANBUs Quesetion

[Thomas Petazzoni]

Dear Ted Wood,

On Tue, 15 Jan 2013 15:53:06 -0000, Ted Wood wrote:

> As for providing driver source code, I really wasn't expecting anyone
> to be prepared to dig around in it. That's supposed to be my job.
> 
> But for what it's worth the source code is at: 
> 
> http://www.peak-system.com/fileadmin/media/linux/index.htm

As I said already, the pcan-usb driver is already part of the mainline
Linux kernel. Why aren't you using this driver, which is already part
of any Linux kernel that you get, and doesn't require any patching or
anything?

Thomas
-- 
Thomas Petazzoni, Free Electrons
Kernel, drivers, real-time and embedded Linux
development, consulting, training and support.
http://free-electrons.com

[Buildroot] CANBUs Quesetion

[Thomas Petazzoni]

Dear Will Moore,

On Tue, 15 Jan 2013 16:58:11 -0000, Will Moore wrote:

> I think CAN network support is mainline but
> http://www.linuxdriverproject.org/mediawiki/index.php/Out_Of_Tree_Drivers#Contro
> ller_Area_Network_.28CAN.2C_ISO_11898.29 suggests that the peak
> system drivers are out of tree?  Or did I miss something?

I don't know exactly what the mainline driver supports, but:

$ ls drivers/net/can/usb/peak_usb/
Makefile  pcan_usb.c  pcan_usb_core.c  pcan_usb_core.h  pcan_usb_pro.c  pcan_usb_pro.h

$ cat drivers/net/can/usb/Kconfig
[...]
config CAN_PEAK_USB
	tristate "PEAK PCAN-USB/USB Pro interfaces"
	---help---
	  This driver supports the PCAN-USB and PCAN-USB Pro adapters
	  from PEAK-System Technik (http://www.peak-system.com).

(This is a 3.8-rc2 or -rc3 kernel, don't remember)

Thomas
-- 
Thomas Petazzoni, Free Electrons
Kernel, drivers, real-time and embedded Linux
development, consulting, training and support.
http://free-electrons.com

[Buildroot] CANBUs Quesetion

[Yegor Yefremov]

I thought Ted Wood has PC104 card like this one
http://www.peak-system.com/PCAN-PC-104.210.0.html?&L=1. The newest
kernel has support for PCAN PCI, PCIe and miniPCI, so I can imagine,
that this card is supported too. see drivers/net/can/sja1000/

Yegor

On Tue, Jan 15, 2013 at 6:01 PM, Thomas Petazzoni
<thomas.petazzoni@free-electrons.com> wrote:
> Dear Will Moore,
>
> On Tue, 15 Jan 2013 16:58:11 -0000, Will Moore wrote:
>
>> I think CAN network support is mainline but
>> http://www.linuxdriverproject.org/mediawiki/index.php/Out_Of_Tree_Drivers#Contro
>> ller_Area_Network_.28CAN.2C_ISO_11898.29 suggests that the peak
>> system drivers are out of tree?  Or did I miss something?
>
> I don't know exactly what the mainline driver supports, but:
>
> $ ls drivers/net/can/usb/peak_usb/
> Makefile  pcan_usb.c  pcan_usb_core.c  pcan_usb_core.h  pcan_usb_pro.c  pcan_usb_pro.h
>
> $ cat drivers/net/can/usb/Kconfig
> [...]
> config CAN_PEAK_USB
>         tristate "PEAK PCAN-USB/USB Pro interfaces"
>         ---help---
>           This driver supports the PCAN-USB and PCAN-USB Pro adapters
>           from PEAK-System Technik (http://www.peak-system.com).
>
> (This is a 3.8-rc2 or -rc3 kernel, don't remember)
>
> Thomas
> --
> Thomas Petazzoni, Free Electrons
> Kernel, drivers, real-time and embedded Linux
> development, consulting, training and support.
> http://free-electrons.com
> _______________________________________________
> buildroot mailing list
> buildroot at busybox.net
> http://lists.busybox.net/mailman/listinfo/buildroot