AW: [U-Boot-Users] EMAC2 & EMAC3 operation on PPC 440GX

David Grab
2005-07-12T15:25:15Z

>I'm also using the Marvel 88E1111 PHY with no
>problems. Note that you must follow the reset
>waveform exactly per the data sheet or the PHYs will
>be in la la land. Hopefully the reset discrete is
>connect to a GPIO pin. Since this PHY can not be
>strapped for RGMII, you also must set register 20 to
>0xce3 in your board specific initialization followed
>by a soft reset.

The Phy is strapped for RGMII to Copper mode HWCFG_MODE[3:0]=1011 with auto
negotiation, all capabilities, prefer slave selected. The driver detects the
PHY and read properly out the speed and duplex. I don?t see an issue with
it?!

I found an hardware issue on my board. The reference clock GMCRefClk was
missing. So no TxClk could be generated from the EMAC. But now i have
trouble with the ethernet driver. After setting ethernet device to ETH2 with
"setenv ethact ppc_440x_eth2" and then ping a network device i got stuck.
Debugging the code shows me that a external interrupt is coming with
uic1msr=A0000000. This means that UIC_MS and UIC_MRDE is pending. But it
can?t be handled in enetInt because the second if clause is not matching and
the functions returns (see following code). This results in an endless loop
of the interrupt handler. Do someone have a hint why UIC_MS and UIC_MRDE
comes up and how i can solve my problem? Another strange thing is that i
have the waveform of the GMC0TxClk on all GMC0TxData lines. Same behavior on
second line. Is this normal for the PPC 440 GX EMAC?

if (!(my_uic0msr & (UIC_MRE | UIC_MTE))
&& !(my_uic1msr &
(UIC_ETH0 | UIC_ETH1 | UIC_MS | UIC_MTDE |
UIC_MRDE))) {
/* not for us */
return (rc);
}
#if defined (CONFIG_440_GX)
if (!(my_uic0msr & (UIC_MRE | UIC_MTE))
&& !(my_uic2msr & (UIC_ETH2 | UIC_ETH3))) {
/* not for us */
return (rc);
}
#endif

u-boot output:

U-Boot relocated to 1ffc2000
Net: Install interrupt for vector 32 ==> 1ffc648c
Install interrupt for vector 10 ==> 1ffc648c
Install interrupt for vector 11 ==> 1ffc648c
Install interrupt for vector 33 ==> 1ffc648c
Install interrupt for vector 34 ==> 1ffc648c
ppc_440x_eth0, ppc_440x_eth1, ppc_440x_eth2, ppc_440x_eth3
BEDBUG:ready
=> setenv ethact ppc_440x_eth2
=> ping 192.168.0.121
Trying ppc_440x_eth2
About preceeding transfer (eth2):
- Sent packet number 0
- Received packet number 0
- Handled packet number 0
Waiting for PHY auto negotiation to complete.. done
Install interrupt for vector 65 ==> 1ffc648c
Install interrupt for vector 64 ==> 1ffc648c

Which settings did you made in u-boot to get your ethernet functioning with
your board? Maybe it helps me to find my problem...

Thx for your help,

David

--- "Travis B. Sawyer" <tsawyer+u-boot@sandburst.com>
wrote:

> David Grab wrote:
> > Hello,
> >
> > as mentioned before i?m using two Marvel 88E1111
> PHY on my PPC440GX Board.
> > They are configured as a RGMII to copper interface
> for use with EMAC 2 & 3.
> > So now i?m in trouble with the configuration of
> the network. After booting i
> > set with "setenv ethact ppc_440x_eth2" EMAC2 for
> networking. After that i
> > try a "ping" to know if network is working.
> Reading the speed and duplex
> > from PHY works, but after that i got in an endless
> loop. I figured out, that
> > no interrupt is recognized and in 440gx_enet.c in
> ppc_440x_eth_init the
> > default configuration of the interrupt handler is
> for ETH0:
> >
> > irq_install_handler (VECNUM_EWU0 + (hw_p->devnum
> * 2),
> > (interrupt_handler_t *) enetInt, dev);
> > irq_install_handler (VECNUM_ETH0 + (hw_p->devnum
> * 2),
> > (interrupt_handler_t *) enetInt, dev);
> >
> > so i changed it as following...
> >
> > irq_install_handler (VECNUM_EWU2 + (hw_p->devnum
> * 2),
> > (interrupt_handler_t *) enetInt, dev);
> > irq_install_handler (VECNUM_ETH2 + (hw_p->devnum
> * 2),
> > (interrupt_handler_t *) enetInt, dev);
>
> You shouldn't need to do this. I have 3 different
> boards that work fine
> with emac2 & emac3.
>
>
> >
> > and added in vecnum.h these lines:
> >
> > #define VECNUM_ETH2 (64 + 0) /* Ethernet
> 0 interrupt status */
> > #define VECNUM_EWU2 (64 + 1) /* Ethernet
> 0 wakeup */
> >
> > But this didn?t solve the problem. Actually i also
> couldn?t get the TxCLK
> > work on my RGMII Bridge and i don?t know why.
>
> I saw the note yesterday about the etch length. The
> hw guys didn't want
> to route the 13" of extra etch so I whack a reg in
> our phy to tell it
> to skew the clock.
>
> -travis
>
>
>
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