Hello,
We are doing problems to integrate the Atom E3815 with the I218LM phys devices.
- Scenary 1: We have developed a device with 2 ethernet connections based on phy devices I210LM full PCIe 2.1 compliant connected to PCIe[2] and PCIe[3] to the Atom E3815. This scenary is full working and detected in linux based system.
- Scenary 2: In 2 new prototyped we decided to replace the phys because we don't found available stock for I210LM > 20 weeks. This prototyped aren't working right now. I can view by 'dmesg' that the same driver is loaded but the new phys I228LM aren't detected.
I reviewed the I228LM datasheet and we can read the next note in the "Overview Introduction":
"The Intel Ethernet Connection I218 PCIe interface is not PCIe compliant. It operates at half the speed of the PCI Express Specification v1.1 (2.5GT/s). In this datasheet, the term PCIe-based is interchangeable with PCIe. There are no design layout differences between normal PCIe and the Intel Ethernet Connection I218's PCIe-based interface."
- Could it be the problem, i.e., it is the PCIe-based interface of I218 needs to work at half speed, or not?
- If so that, how can we fix it with the Atom E3815?
We have to add an intermediate chip like the Intel C220 (PCH-LP) for the I218LM PCIe-based interface to work or we can fix it with BIOS + Linux modifications...
Best regards in advance,
Fran Arroyo
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