[Avila] GPL NPE driver working with the GW2347 and its DP83848 phy?

[Tim Harvey]

Joel,

Yes, apparently the register change that the bootloader performs to set the
phy_addr gets whacked before linux loads.  This is a patch against Christian
Hohnstaedt's GPL NPE driver in my 2.6.19 tree:

-------------
This patch adds detection for the DP83848 PHY used on the GW2347 and 
sets the appropriate register to set its phy_id from 1 to 0
(unclear why this setting which is done in the bootloader does not 'stick')

--- orig/linux-2.6.19.x/drivers/net/ixp4xx/phy.c        2007-02-13
21:16:20.000000000 -0800
+++ new/linux-2.6.19.x/drivers/net/ixp4xx/phy.c 2007-03-25 22:15:55.000000000
-0700
@@ -109,5 +109,17 @@
        mac->mii.reg_num_mask = 0x1f;
        mac->mii.mdio_read = mdio_read_register;
        mac->mii.mdio_write = mdio_write_register;
+
+       /* GW2347: check for DP83848 and if present set phy id from 1 to 0 */
+       if (phy_id == 0 &&
+           mdio_read_register(dev, 1, 0x02) == 0x2000 &&
+           mdio_read_register(dev, 1, 0x03) == 0x5c90) /* DP83848 PHY */
+       {
+               printk("%s: PHY[1] DP83848 detected - changing to phy id 0\n", 
+                       dev->name);
+               /* change phy id from 1 to 0 */
+               i = mdio_read_register(dev, 1, 0x19);
+               mdio_write_register(dev, 1, 0x19, (i & 0xfffe) | 0x8000);
+       }
 }
 
---------------

 
--- Joel Lindsay <joel at waveteq.com> wrote:

> Tim,
> 
> Did you resolve this.  I am about to try using this driver with the GW2347.
> 
> Joel
> 
> 
> ----- Original Message ----- 
> From: "Tim Harvey" <tim_harvey at yahoo.com>
> To: <avila at lists.unixstudios.net>
> Sent: Saturday, March 17, 2007 9:24 PM
> Subject: [Avila] GPL NPE driver working with the GW2347 and its DP83848 phy?
> 
> 
> Anyone else out there working with Christian Hohnstaedt's GPL ixp4xx NPE 
> v0.3.1 driver on the GW2347 which uses a National DP83848  PHY?  I'm finding 
> that on the GW2347 the driver see's the phy as 'unresponsive' where it works 
> fine on the GW2348 boards.  I'm using this driver with a linux 2.6.19 
> kernel.
> 
> Tim
> 
> 
> 
> 
> 
> 
> 
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