Ethernet link speed auto detection

Read the triple speed ethernet user guide pdf! It's all written and shown there.

Thank you, but I would not have asked before looking there.

figure 4-12 on page 4-24

Thank you. Figure 4-12 on page 4-24 is for MII/GMII interface. I am using a RGMII interface so I think the correct figure should be 4-13. My logic is as shown in 4-13 with set_1000 and set_10 tied to 0 in the FPGA. With this logic I can use the MAC in 1000 or 100, but I have to manually select the speed with the ETH_SPEED bit in the command_config register. What I am looking for is a way to make the MAC or iniche detect the ethernet link speed without using the set_1000 input.

Those pins are not dependent on MII/GMII/RGMII bus and are valid for all types. Check the RGMII bus specification.

Ok, but the problem is that I do not have those inputs (set_1000 and set_10) to the FPGA and I am wondering if there is another way to detect the link speed.

Then use the management bus to the PHY. Do You use a tcp/ip stack?

I am able to read the PHY registers over MDIO (MDIO Space 1 in the TSE component). I see that the correct speed is reported but it is not reflected in the ETH_SPEED bit in the command_config register. I am using a tcp/ip stack (iniche) and it is working. The project is based on the simple socket server RGMII template. I have added the PHY profile with alt_tse_phy_add_profile so iniche should have information of where to find the correct status register and bit location for the link speed. Is there something else I am missing to get it to detect and change the speed?

You can use the function getPHYSpeed() provided by HAL driver (include altera_avalon_tse.h)

Check the TSE MAC driver sources. The driver tells the speed during setup, so check how the driver checks registers.