How to support scc-enet on MPC8247 in Linux 2.6.32.6

How to support scc-enet on MPC8247 in Linux 2.6.32.6

[Peter Pan]

I'm porting Linux 2.6.32.6 to our MPC8247 based board. We use SCC3 and
SCC4 as ethernet port. These two ports are connect with LXT905 PHY
chip.
I'm now using fs_enet driver, how should I config the scc port in dtc
file. I copied from mgcoge.dts file, and my dtc file of scc enet is
follows:

            eth2: ethernet@11a40 {
                device_type = "network";
                compatible = "fsl,mpc8247-scc-enet",
                             "fsl,cpm2-scc-enet";
                reg = <0x11a40 0x20 0x8200 0x100 0x11390 0x1>;
                local-mac-address = [ 00 00 00 00 00 00 ]; /* filled
by U-Boot */
                interrupts = <42 8>;
                interrupt-parent = <&PIC>;
                linux,network-index = <0x2>;
                fsl,cpm-command = <0x8c00000>;
                fixed-link = < 0 0 10 0 0 >;
            };
But i does not working. Linux says that PHY 0:00 is not found. I dive
into the code, and that's according to the fixed-link property.
I'm wondering how to support scc-enet in my situation.

Re: How to support scc-enet on MPC8247 in Linux 2.6.32.6

[Scott Wood]

Peter Pan wrote:
> I'm porting Linux 2.6.32.6 to our MPC8247 based board. We use SCC3 and
> SCC4 as ethernet port. These two ports are connect with LXT905 PHY
> chip.
> I'm now using fs_enet driver, how should I config the scc port in dtc
> file. I copied from mgcoge.dts file, and my dtc file of scc enet is
> follows:
> 
>             eth2: ethernet@11a40 {
>                 device_type = "network";
>                 compatible = "fsl,mpc8247-scc-enet",
>                              "fsl,cpm2-scc-enet";
>                 reg = <0x11a40 0x20 0x8200 0x100 0x11390 0x1>;
>                 local-mac-address = [ 00 00 00 00 00 00 ]; /* filled
> by U-Boot */
>                 interrupts = <42 8>;
>                 interrupt-parent = <&PIC>;
>                 linux,network-index = <0x2>;
>                 fsl,cpm-command = <0x8c00000>;
>                 fixed-link = < 0 0 10 0 0 >;
>             };
> But i does not working. Linux says that PHY 0:00 is not found. I dive
> into the code, and that's according to the fixed-link property.
> I'm wondering how to support scc-enet in my situation.

Do you really want fixed-link, or does the board have a working MDIO 
interface?  If the latter, you need a phy-handle property instead, 
pointing to a PHY node under an MDIO bus node that represents how MDIO 
is wired on your board.

-Scott

Re: How to support scc-enet on MPC8247 in Linux 2.6.32.6

[Peter Pan]

There is an MDIO used by FCC, but the SCC is connected with LXT905,
which is Ethernet Interface Adapter. So I think the SCC should be
fixed-link. But how can I set the fixed-link property? I searched
through the Document directory, there is nothing about the fixed-link
property.

2010/4/23 Scott Wood <scottwood@freescale.com>:
> Peter Pan wrote:
>>
>> I'm porting Linux 2.6.32.6 to our MPC8247 based board. We use SCC3 and
>> SCC4 as ethernet port. These two ports are connect with LXT905 PHY
>> chip.
>> I'm now using fs_enet driver, how should I config the scc port in dtc
>> file. I copied from mgcoge.dts file, and my dtc file of scc enet is
>> follows:
>>
>> =A0 =A0 =A0 =A0 =A0 =A0eth2: ethernet@11a40 {
>> =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0device_type =3D "network";
>> =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0compatible =3D "fsl,mpc8247-scc-enet",
>> =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 "fsl,cpm2-scc-en=
et";
>> =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0reg =3D <0x11a40 0x20 0x8200 0x100 0x1139=
0 0x1>;
>> =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0local-mac-address =3D [ 00 00 00 00 00 00=
 ]; /* filled
>> by U-Boot */
>> =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0interrupts =3D <42 8>;
>> =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0interrupt-parent =3D <&PIC>;
>> =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0linux,network-index =3D <0x2>;
>> =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0fsl,cpm-command =3D <0x8c00000>;
>> =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0fixed-link =3D < 0 0 10 0 0 >;
>> =A0 =A0 =A0 =A0 =A0 =A0};
>> But i does not working. Linux says that PHY 0:00 is not found. I dive
>> into the code, and that's according to the fixed-link property.
>> I'm wondering how to support scc-enet in my situation.
>
> Do you really want fixed-link, or does the board have a working MDIO
> interface? =A0If the latter, you need a phy-handle property instead, poin=
ting
> to a PHY node under an MDIO bus node that represents how MDIO is wired on
> your board.
>
> -Scott
>