PPC405GPWalnutPciBusMaster

PPC405GPWalnutPciBusMaster

[Hideo Noda]

Hi,

I am trying to install Intel eepro100 onto WalnutPPC405GP.
Basic PCI settings seem good but no frame is transmitted.
The environment is WalnutPPC305GP with HardHatLinux 2.4.2 from
MonraVista.

I can read or write eepro configuration registers and other control
registers via PCI memory space.
But Bus Master operations do not seem functional. I am confirmed that
MASTER operation bit in eepro100 is enabled.
I think some more settings are needed for PPC405GP built-in PCI control
registers and/or Walnut board jumpers/dipswitches.

Has anyone tried PCI cards with BUS MASTER operations for Walnut
PPC405GP?

Thanks in advance,

Hideo


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Re: PPC405GPWalnutPciBusMaster

[andrew may]

On Thu, Apr 19, 2001 at 10:44:08AM +0900, Hideo Noda wrote:
> Has anyone tried PCI cards with BUS MASTER operations for Walnut
> PPC405GP?

I have tried and failed. I have other things to work on right now
so I have just delayed looking into it anymore until the 2.0 CDK
comes out. I think that should be by the end of the month.

I think there is a problem with the virt_to_phys matching the
PTM1/BAR1. In the preliminary 405gp docs that I have Fig 17-59
on page 17-62 give a good overview on how things need to be
setup on the chip, but I am not sure on what the values
need to be.


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AW: PPC405GPWalnutPciBusMaster

[Stefan Roese]

> On Thu, Apr 19, 2001 at 10:44:08AM +0900, Hideo Noda wrote:
> > Has anyone tried PCI cards with BUS MASTER operations for Walnut
> > PPC405GP?
>
> I have tried and failed. I have other things to work on right now
> so I have just delayed looking into it anymore until the 2.0 CDK
> comes out. I think that should be by the end of the month.
>
> I think there is a problem with the virt_to_phys matching the
> PTM1/BAR1. In the preliminary 405gp docs that I have Fig 17-59
> on page 17-62 give a good overview on how things need to be
> setup on the chip, but I am not sure on what the values
> need to be.

Which bootloader/firmware are you using? The pci configuration should be
done within the bootloader. If you are using PPCBoot, I am not shure if the
configuration is correct regarding the busmaster setup (although I did the
port based on the IBM OpenBios). The bus master functionality was never
tested - sorry for that.

Stefan.

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Phone: +49-511-37298-0
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email: stefan.roese@esd-electronics.com
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Re: PPC405GPWalnutPciBusMaster

[acmay]

On Thu, Apr 19, 2001 at 10:07:55AM +0200, Stefan Roese wrote:
>
> > On Thu, Apr 19, 2001 at 10:44:08AM +0900, Hideo Noda wrote:
> > > Has anyone tried PCI cards with BUS MASTER operations for Walnut
> > > PPC405GP?
> >
> > I have tried and failed. I have other things to work on right now
> > so I have just delayed looking into it anymore until the 2.0 CDK
> > comes out. I think that should be by the end of the month.
> >
> > I think there is a problem with the virt_to_phys matching the
> > PTM1/BAR1. In the preliminary 405gp docs that I have Fig 17-59
> > on page 17-62 give a good overview on how things need to be
> > setup on the chip, but I am not sure on what the values
> > need to be.
>
> Which bootloader/firmware are you using? The pci configuration should be
> done within the bootloader. If you are using PPCBoot, I am not shure if the
> configuration is correct regarding the busmaster setup (although I did the
> port based on the IBM OpenBios). The bus master functionality was never
> tested - sorry for that.

I am just using the OpenBios for now. We will be spinning our own board
within the year so I was going to delay looking into doing the PPCBoot
code until then. I was able to look at the PCI registers when the kernel
booted and they appeared to be OK. For the hell of it I tried to change them
in the kernel and it hung during boot. I did not see in the docs the constraints
on when I could change those registers. Is it possible to do it very early in
the Linux boot code?
Thanks
--
Andrew May


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RE: PPC405GPWalnutPciBusMaster

[Cagle, John]

Try this command before loading the eepro100 driver module:

	setpci -s 0:0.1 14.L=0x8

It seems that the latest openbios doesn't program the PCI bridge registers
appropriately.

Regards,
John
jcagle@kernel.org

> -----Original Message-----
> From: Hideo Noda [mailto:Hideo_Noda@mutoh.co.jp]
> Sent: Wednesday, April 18, 2001 8:44 PM
> To: linuxppc-embedded@lists.linuxppc.org
> Subject: PPC405GPWalnutPciBusMaster
>
>
>
> Hi,
>
> I am trying to install Intel eepro100 onto WalnutPPC405GP.
> Basic PCI settings seem good but no frame is transmitted.
> The environment is WalnutPPC305GP with HardHatLinux 2.4.2 from
> MonraVista.
>
> I can read or write eepro configuration registers and other control
> registers via PCI memory space.
> But Bus Master operations do not seem functional. I am confirmed that
> MASTER operation bit in eepro100 is enabled.
> I think some more settings are needed for PPC405GP built-in
> PCI control
> registers and/or Walnut board jumpers/dipswitches.
>
> Has anyone tried PCI cards with BUS MASTER operations for Walnut
> PPC405GP?
>
> Thanks in advance,
>
> Hideo
>
>

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Re: PPC405GPWalnutPciBusMaster

[machael thailer]

Now I have the same problem as you meet before.
Have you find a good solutions?
Thank you very mcuh.

machael

>
> Hi,
>
> I am trying to install Intel eepro100 onto WalnutPPC405GP.
> Basic PCI settings seem good but no frame is transmitted.
> The environment is WalnutPPC305GP with HardHatLinux 2.4.2 from
> MonraVista.
>
> I can read or write eepro configuration registers and other control
> registers via PCI memory space.
> But Bus Master operations do not seem functional. I am confirmed that
> MASTER operation bit in eepro100 is enabled.
> I think some more settings are needed for PPC405GP built-in PCI control
> registers and/or Walnut board jumpers/dipswitches.
>
> Has anyone tried PCI cards with BUS MASTER operations for Walnut
> PPC405GP?
>
> Thanks in advance,
>
> Hideo
>
>
>


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Re: PPC405GPWalnutPciBusMaster

[Hideo Noda]

We are running pci cards very well.

The boot loader we used was openbios, which was already
installed in the flash.
We ported a part of ppcboot to linux kernel to complete
the pci configuration. Now pci is running well on our Walnut.

What we did was:

add the function
"void pci_init(void)" in <cpu/ppc4xx/405gp_pci.c> in ppcboot
directory

into
"void __init pcibios_init(void)" in <linux/arch/ppc/kernel/pci.c>

Some minor changes were needed such as functions/macros
renaming.


The conclusion is that ppcboot configures pci well.

Above is one of solutions.
Swapping openbios with ppcboot will be good.
Downloading and running ppcboot, then downloading linux by
ppcboot seems well.

hideo



"dony.he@huawei.com" wrote:

> Now I have the same problem as you meet before.
> Have you find a good solutions?
> Thank you very mcuh.
>
> machael
>
> >
> > Hi,
> >
> > I am trying to install Intel eepro100 onto WalnutPPC405GP.
> > Basic PCI settings seem good but no frame is transmitted.
> > The environment is WalnutPPC305GP with HardHatLinux 2.4.2 from
> > MonraVista.
> >
> > I can read or write eepro configuration registers and other control
> > registers via PCI memory space.
> > But Bus Master operations do not seem functional. I am confirmed that
> > MASTER operation bit in eepro100 is enabled.
> > I think some more settings are needed for PPC405GP built-in PCI control
> > registers and/or Walnut board jumpers/dipswitches.
> >
> > Has anyone tried PCI cards with BUS MASTER operations for Walnut
> > PPC405GP?
> >
> > Thanks in advance,
> >
> > Hideo
> >
> >
> >


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Re: PPC405GPWalnutPciBusMaster

[John Cagle]

Until a newer kernel is released by Monta Vista that includes a fix,
you can use setpci to change the settings of the PCI bridge as follows:

  setpci -s 0:0.1 14.L=0x8

Then you should be able to "insmod eepro100"...

Regards,
John

On Mon, May 14, 2001 at 06:44:31PM +0800, machael thailer wrote:
>
> Now I have the same problem as you meet before.
> Have you find a good solutions?
> Thank you very mcuh.
>
> machael
>
> >
> > Hi,
> >
> > I am trying to install Intel eepro100 onto WalnutPPC405GP.
> > Basic PCI settings seem good but no frame is transmitted.
> > The environment is WalnutPPC305GP with HardHatLinux 2.4.2 from
> > MonraVista.
> >
> > I can read or write eepro configuration registers and other control
> > registers via PCI memory space.
> > But Bus Master operations do not seem functional. I am confirmed that
> > MASTER operation bit in eepro100 is enabled.
> > I think some more settings are needed for PPC405GP built-in PCI control
> > registers and/or Walnut board jumpers/dipswitches.
> >
> > Has anyone tried PCI cards with BUS MASTER operations for Walnut
> > PPC405GP?
> >
> > Thanks in advance,
> >
> > Hideo

------------------------------
John Cagle <jcagle@kernel.org>

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