Re: usb/eth DTS nodes for custom board based on mpc5200

Re: usb/eth DTS nodes for custom board based on mpc5200

[Grant Likely]

On Fri, Dec 5, 2008 at 4:22 AM, Angelo <s104259@yahoo.it> wrote:
> Hi all.
>
> I'd like to know if it's necessary to modify my DTS.
>
> On my board I have:
> * u-boot 1.2.0
> * kernel 2.6.21
> * arch=powerpc
> * dts based on lite5200b.dts
> * USB port (USB2) configured on the Ethernet port
>
> Is it necessary to combine Ethernet and usb nodes into the device tree
> source?

No.  Configuring the Ethernet pins for USB IO is just a pin routing
board setup task.  You do need to make sure U-Boot sets up the
port_config register correctly, but it doesn't impact the device tree.
 You don't need to change any of the values in the USB node.

However, if the Ethernet device is unused then you should remove the
Ethernet node from your device tree.

g.

-- 
Grant Likely, B.Sc., P.Eng.
Secret Lab Technologies Ltd.

R: usb/eth DTS nodes for custom board based on mpc5200

[gianfranco.casanova]

[-- Attachment #1: Type: text/plain, Size: 2389 bytes --]

Hi Grant

we have already tested what you are suggesting, but nothing happens.

I'm supposing the problem comes from interrupts.

In fact USB is still alive, every 5 sec. we can see some timeout messages.

(from previous post)

root@RadioNav: ~ #[   24.027842] usb 1-2: khubd timed out on ep0in len=0/64
root@RadioNav: ~ #[   29.199841] usb 1-2: khubd timed out on ep0in len=0/64
root@RadioNav: ~ #[   34.307841] usb 1-2: khubd timed out on ep0in len=0/64
root@RadioNav: ~ #[   34.382786] ppc-of-ohci f0001000.usb: GetStatus roothub.portstatus [1] = 0x00100103 PRSC PPS PES CCS
root@RadioNav: ~ #[   34.446789] usb 1-2: device descriptor read/64, error -110
root@RadioNav: ~ #
root@RadioNav: ~ #cat /proc/interrupts
           CPU0
134:       5689  MPC52xx Peripherals Edge      ohci_hcd:usb1
139:        207  MPC52xx Peripherals Edge      mpc52xx_psc_uart
143:          0  MPC52xx Peripherals Edge      i2c-mpc
144:          0  MPC52xx Peripherals Edge      i2c-mpc
BAD:          0

Ideas :( ??
Thanks J

P.S. Using lite5200 EVB USB works well using almost same drivers.

-----Messaggio originale-----
Da: linuxppc-dev-bounces+gianfranco.casanova=alice.it@ozlabs.org per conto di Grant Likely
Inviato: ven 05/12/2008 15.40
A: s104259@yahoo.it
Cc: linuxppc-dev; devicetree-discuss@ozlabs.org
Oggetto: Re: usb/eth DTS nodes for custom board based on mpc5200
 
On Fri, Dec 5, 2008 at 4:22 AM, Angelo <s104259@yahoo.it> wrote:
> Hi all.
>
> I'd like to know if it's necessary to modify my DTS.
>
> On my board I have:
> * u-boot 1.2.0
> * kernel 2.6.21
> * arch=powerpc
> * dts based on lite5200b.dts
> * USB port (USB2) configured on the Ethernet port
>
> Is it necessary to combine Ethernet and usb nodes into the device tree
> source?

No.  Configuring the Ethernet pins for USB IO is just a pin routing
board setup task.  You do need to make sure U-Boot sets up the
port_config register correctly, but it doesn't impact the device tree.
 You don't need to change any of the values in the USB node.

However, if the Ethernet device is unused then you should remove the
Ethernet node from your device tree.

g.

-- 
Grant Likely, B.Sc., P.Eng.
Secret Lab Technologies Ltd.
_______________________________________________
Linuxppc-dev mailing list
Linuxppc-dev@ozlabs.org
https://ozlabs.org/mailman/listinfo/linuxppc-dev


[-- Attachment #2: Type: text/html, Size: 3603 bytes --]

Re: R: usb/eth DTS nodes for custom board based on mpc5200

[Grant Likely]

On Fri, Dec 5, 2008 at 8:16 AM,  <gianfranco.casanova@alice.it> wrote:
> Hi Grant
>
> we have already tested what you are suggesting, but nothing happens.
>
> I'm supposing the problem comes from interrupts.

Unlikely.  The interrupt routing is hard wired into the SoC and
probably not messed up (unless the USB node in the device tree has
been changed).  You may have a problem with port_config (setup for
single ended vs differential signaling) or some other electrical
difference from the 5200.  Beyond that it's not something that is easy
to figure out over email.

g.

-- 
Grant Likely, B.Sc., P.Eng.
Secret Lab Technologies Ltd.

Re: R: usb/eth DTS nodes for custom board based on mpc5200

[Angelo]

[-- Attachment #1: Type: text/plain, Size: 2858 bytes --]

Using 2.6.26.3 nothing changes.



Reading MPC5200 user guide I calculate the value of port_config to
configure USB on ethernet port. So I'm using this value in arch=ppc
everyting works.

With arch=powerpc I see that the kernel read the device tree blob, so I think that I need to modify it.



However, when I plug-in my usb storage.. the system try to "initialize" the device but something is dead...



How can I enable the sequent option (irqpoll):

...

irq 134: nobody cared (try booting with the "irqpoll" option)
...


thanks,
@ngel


--- Ven 5/12/08, Grant Likely <grant.likely@secretlab.ca> ha scritto:
Da: Grant Likely <grant.likely@secretlab.ca>
Oggetto: Re: usb/eth DTS nodes for custom board based on mpc5200
A: s104259@yahoo.it
Cc: devicetree-discuss@ozlabs.org
Data: Venerdì 5 dicembre 2008, 16:16

On Fri, Dec 5, 2008 at 8:02 AM, Angelo <s104259@yahoo.it> wrote:
> Ok.
>
> Tha main problem is that if I cross-compile kernel for ARCH=ppc
everythings
> work fine.
>
>>"Configuring the Ethernet pins for USB IO is just a pin routing
board setup
>> task."
>
> What should I do for this?!?!?

Without seeing your board I don't know, but I do know that there have
been a *lot* of changes in mpc5200 support since 2.6.21, including
USB.  You should try using a 2.6.27 kernel.

>
> * I've configured the port_config in  lite5200_setup_cpu(void)
function
> [arch/powerpc/platforms/52xx/lite5200.c]. I put in port_config the same
> value that I put with ARCH=ppc!
>
> However I'm sure that my u-boot sets-up the port_config register
because
> fatls usb 0:1 / show me the content of usb-storage.

If U-Boot sets up port_config correctly, then you do *not* need to
change the setting in the kernel.

-- 
Grant Likely, B.Sc., P.Eng.
Secret Lab Technologies Ltd.

--- Ven 5/12/08, Grant Likely <grant.likely@secretlab.ca> ha scritto:
Da: Grant Likely <grant.likely@secretlab.ca>
Oggetto: Re: R: usb/eth DTS nodes for custom board based on mpc5200
A: gianfranco.casanova@alice.it
Cc: s104259@yahoo.it, "linuxppc-dev" <linuxppc-dev@ozlabs.org>, devicetree-discuss@ozlabs.org
Data: Venerdì 5 dicembre 2008, 16:25

On Fri, Dec 5, 2008 at 8:16 AM,  <gianfranco.casanova@alice.it> wrote:
> Hi Grant
>
> we have already tested what you are suggesting, but nothing happens.
>
> I'm supposing the problem comes from interrupts.

Unlikely.  The interrupt routing is hard wired into the SoC and
probably not messed up (unless the USB node in the device tree has
been changed).  You may have a problem with port_config (setup for
single ended vs differential signaling) or some other electrical
difference from the 5200.  Beyond that it's not something that is easy
to figure out over email.

g.

-- 
Grant Likely, B.Sc., P.Eng.
Secret Lab Technologies Ltd.



      

[-- Attachment #2: Type: text/html, Size: 3417 bytes --]