[U-Boot-Users] MPC8541CDS board PHY interface

[U-Boot-Users] MPC8541CDS board PHY interface

[M Ravi Prakash Reddy]

 Hi,

  We have designed a MPC8541 based card taking MPC8541CDS card as reference . In our card we have provided marvell Gigabit Dual PHY chip "MV88E1121" on the Tsec RGMII interface. We are using U-Boot as firmware . We have changed the value of first two elements of structure "phy_info " from 0x01410c6 &  "Marvell 88E1011S" to 0x01410cb & "Marvell 88E1121S"respectively in in tsec.c file. These changes we have made as per the PHY identifier 1 & PHY identifier 2 from the 88E1121 datasheet .  With these changes U-boot is able to recognize  our Phy chip . 
        
  As per  MPC8555ERM.pdf document TX_CLK for the PHY will be supplied by the powerPC in RGMII mode . In our case we are not getting this clock. We are not able to ping our board.
   we want to know what all changes are required in the U-Boot code to initialize the PowerPC for RGMII operation.

Thanks & regards
M Ravi
   




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[U-Boot-Users] MPC8541CDS board PHY interface

[Manish Jaggi]

>
> Today's Topics:
>
>   1. MPC8541CDS board PHY interface (M Ravi Prakash Reddy)
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Tue, 26 Feb 2008 15:39:05 +0530 (IST)
> From: M Ravi Prakash Reddy <mrp_crl@yahoo.co.in>
> Subject: [U-Boot-Users] MPC8541CDS board PHY interface
> To: u-boot-users at lists.sourceforge.net
> Message-ID: <753173.56427.qm@web8911.mail.in.yahoo.com>
> Content-Type: text/plain; charset="utf-8"
>
>  Hi,
>
>  We have designed a MPC8541 based card taking MPC8541CDS card as reference
> . In our card we have provided marvell Gigabit Dual PHY chip "MV88E1121" on
> the Tsec RGMII interface. We are using U-Boot as firmware . We have changed
> the value of first two elements of structure "phy_info " from 0x01410c6 &
>  "Marvell 88E1011S" to 0x01410cb & "Marvell 88E1121S"respectively in in
> tsec.c file. These changes we have made as per the PHY identifier 1 & PHY
> identifier 2 from the 88E1121 datasheet .  With these changes U-boot is able
> to recognize  our Phy chip .
>
>  As per  MPC8555ERM.pdf document TX_CLK for the PHY will be supplied by
> the powerPC in RGMII mode . In our case we are not getting this clock. We
> are not able to ping our board.
>   we want to know what all changes are required in the U-Boot code to
> initialize the PowerPC for RGMII operation.
>
>
You need to set RGMII (1000Mbit) option in MarvelPHY's priv regs. Chk the
Marvell phy's manual

:.:.:.:Manish Jaggi:.:.:.:
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[U-Boot-Users] MPC8541CDS board PHY interface

[Jerry Van Baren]

M Ravi Prakash Reddy wrote:
>  Hi,

Hi Ravi,

[snip]

>   As per  MPC8555ERM.pdf document TX_CLK for the PHY will be supplied by 
> the powerPC in RGMII mode . In our case we are not getting this clock. 
> We are not able to ping our board.

Be aware that u-boot has a "ping" command that you can use to ping 
*other* computers.  U-boot does *NOT* respond to a ping from another 
computer (short explanation: u-boot is a simple polled mode program).

>    we want to know what all changes are required in the U-Boot code to 
> initialize the PowerPC for RGMII operation.

Answered by Manish Jaggi (I'm not qualified to answer this).

> Thanks & regards
> M Ravi

HTH,
gvb