Re: [U-Boot] SMSC LAN8720 support
Hi Maxim,
Two housekeeping items:
1. Please don't top-post
2. Please CC the mailing list. There are others that may be able to
help you.
On 2/9/2010 12:11 PM, Maxim Podbereznyi wrote:
Hi Ben!
Thank you for answering!
Unfortunately I don't have any other board to check the Ethernet. I
began to check sources and found that PHY ID is not read well.
In the following code I have No PHY present on the console:
/* Check if the PHY is up to snuff... */
phy_id = macb_mdio_read(macb, MII_PHYSID1);
if (phy_id == 0x) {
printf(%s: No PHY present\n, netdev-name);
return 0;
}
}
I think at least ID must be read well. Bad luck :(
Are you passing the correct PHY address as parameter 3 to
macb_eth_initialize()? You should know the address from the board
schematic. Alternatively, it appears that MACB has an option called
CONFIG_MACB_SEARCH_PHY that will probe the MDIO bus. You might wish to
enable that option.
The MII_PHYSID1 is an IEEE 802.3-specified register. If you can't read
it, it's not anything peculiar to the new type of PHY, but more likely a
hardware/bootstrap issue. Any incompatibilities with this PHY will
come later when you try to configure some of the less-standard things
such as RGMII etc.
regards,
Ben
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Re: [U-Boot] SMSC LAN8720 support
Hi Ben! I've made LAN8720 work with AT91SAM9G45 MPU. The problem was in a wrong address assigning during the PHY reset. The PHY has internal pull-down on the PHYAD0 line but the init code for AT91 turns off processor's pull-up during PHY reset only for a few lines and they are not PHYAD0. So I disabled also the processor's pull-up to the right line and the PHY got alive. I've tested tftp - works perfect! Thank you for the help! 2010/2/8 Ben Warren biggerbadder...@gmail.com Hi Maxim, On 2/7/2010 1:32 PM, Maxim Podbereznyi wrote: Hi all! I need enable the support of the new SMSC Ethernet PHY LAN8720 in AT91SAM based system. Can anybody give me a piece of advice how I can do it? I don't have any direct experience with either this PHY or AT91SAM, but a cursory glance of the PHY datasheet makes it seem that there's nothing special here, so it might just work without modification. Do you have a working reference board that has a different PHY that this can be compared to? Any help is appreciated! Regards, Max _ regards, Ben ___ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
Re: [U-Boot] SMSC LAN8720 support
On 2/9/2010 1:04 PM, Maxim Podbereznyi wrote: Hi Ben! I've made LAN8720 work with AT91SAM9G45 MPU. The problem was in a wrong address assigning during the PHY reset. The PHY has internal pull-down on the PHYAD0 line but the init code for AT91 turns off processor's pull-up during PHY reset only for a few lines and they are not PHYAD0. So I disabled also the processor's pull-up to the right line and the PHY got alive. I've tested tftp - works perfect! Thank you for the help! You're welcome. Congratulations! --Ben ___ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
Re: [U-Boot] SMSC LAN8720 support
Hi Maxim, On 2/7/2010 1:32 PM, Maxim Podbereznyi wrote: Hi all! I need enable the support of the new SMSC Ethernet PHY LAN8720 in AT91SAM based system. Can anybody give me a piece of advice how I can do it? I don't have any direct experience with either this PHY or AT91SAM, but a cursory glance of the PHY datasheet makes it seem that there's nothing special here, so it might just work without modification. Do you have a working reference board that has a different PHY that this can be compared to? Any help is appreciated! Regards, Max _ regards, Ben ___ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
[U-Boot] SMSC LAN8720 support
Hi all! I need enable the support of the new SMSC Ethernet PHY LAN8720 in AT91SAM based system. Can anybody give me a piece of advice how I can do it? Any help is appreciated! Regards, Max ___ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
