[U-Boot-Users] MII PHY

[U-Boot-Users] MII PHY

[Richard Klingler]

Evening (o;


Someone has a clue why using "miiphy_reset" and "miiphy_write"
would not work on a MPC852T board with DP83846A PHY?

Always gives "mii_send STUCK!" when I call through common/board.c
via "phy_reset" with PDDIR and PDPAR set correctly to 0x1fff.


Problem is that the DP83846 PHY comes up with "auto-negotiation"
set to on and "isolate" also set to on....so after resetting
the "isolate" bit it works just fine.


Any other nice place to place a PHY reset code?



best regards
rick

[U-Boot-Users] MII PHY

[richard at uclinux.net]

Never mind (o;

> Evening (o;
> 
> 
> Someone has a clue why using "miiphy_reset" and "miiphy_write"
> would not work on a MPC852T board with DP83846A PHY?
> 
> Always gives "mii_send STUCK!" when I call through common/board.c
> via "phy_reset" with PDDIR and PDPAR set correctly to 0x1fff.
> 
> 
> Problem is that the DP83846 PHY comes up with "auto-negotiation"
> set to on and "isolate" also set to on....so after resetting
> the "isolate" bit it works just fine.
> 
> 
> Any other nice place to place a PHY reset code?
> 

PHY has hardwired address of "0" which means "isolate"
for all PHYs I think.  Working perfectly now (o;

Now only board specific FPGA and PCMCIA code is missing
for finishing the com2gether Opus103 support.



rick

[U-Boot-Users] MII PHY

[Yu JunMiao-r61929]

Any one who can tell me where to download the MII specification?
Thx!


-----Original Message-----
From: u-boot-users-admin@lists.sourceforge.net [mailto:u-boot-users-admin at lists.sourceforge.net] On Behalf Of richard at uclinux.net
Sent: 2004?12?27? 16:27
To: u-boot-users at lists.sourceforge.net
Subject: Re: [U-Boot-Users] MII PHY


Never mind (o;

> Evening (o;
> 
> 
> Someone has a clue why using "miiphy_reset" and "miiphy_write" would 
> not work on a MPC852T board with DP83846A PHY?
> 
> Always gives "mii_send STUCK!" when I call through common/board.c via 
> "phy_reset" with PDDIR and PDPAR set correctly to 0x1fff.
> 
> 
> Problem is that the DP83846 PHY comes up with "auto-negotiation" set 
> to on and "isolate" also set to on....so after resetting the "isolate" 
> bit it works just fine.
> 
> 
> Any other nice place to place a PHY reset code?
> 

PHY has hardwired address of "0" which means "isolate"
for all PHYs I think.  Working perfectly now (o;

Now only board specific FPGA and PCMCIA code is missing
for finishing the com2gether Opus103 support.



rick




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[U-Boot-Users] MII PHY

[Yanjun Luo]

On Mon, 27 Dec 2004 16:39:27 +0800, Yu JunMiao-r61929 wrote
> Any one who can tell me where to download the MII specification?
> Thx!

I think you don't need to study MII's specification.
Please study your CPU's and your PHY's datasheet.
Some CPU have a dedicate pin as MDIO MDCK to operate PHY,
others you must use GPIO to control PHY's register.

That's enough I think.
Regards,
Luo Yanjun.