LS1046 Dual 10G XFI PHY MDIO problem

daoyuS — Sat, 06 May 2023 15:22:15 GMT

Hi，

On my customized board, i have a Broadcom BCM89890 10g phy connected to XFI.9 and a Marvell AQR113C 10g phy connected to XFI.10. They share the same EMI2 mdc/mdio interface.

Now XFI.10 AQR113C phy works ok but XFI.9 BCM89890 does not.

In uboot, when i read the BCM phy mdio register, the return is 0xff which seems incorrect. When i use a oscilloscope to probe, the waveform seems to be a MDIO C22 protocol while BCM89890 requires C45.

dts and eth.c are attached. Could you help to check where is wrong in the system.

Thanks.

Re: LS1046 Dual 10G XFI PHY MDIO problem

yipingwang — Wed, 10 May 2023 02:24:44 GMT

Please refer to the following update from the AE team.

Can you please share the u-boot commands used to read registers from both PHYs?

Since they are on the same bus, they should show the same Clause implementation if they are both CL45 devices.

In u-boot, if you give two arguments, it will try CL22. If you give three arguments, it will try CL45.

At the HW level, you can double check MDIO_CCFG[ENC45]=1 from the MDIO offsets.

the offsets-

;MAC1 @ e_0000

;MDIO-1 @ e_1000

;MAC2 @ e_2000

;MDIO-2 @ e_3000

;MAC3 @ e_4000

;MDIO-3 @ e_5000

;MAC4 @ e_6000

;MDIO-4 @ e_7000

;MAC5 @ e_8000

;MDIO-5 @ e_9000

;MAC6 @ e_a000

;MDIO-6 @ e_b000

;MAC7 @ e_c000

;MDIO-7 @ e_d000

;MAC8 @ e_e000

;MDIO-8 @ e_f000

;MAC9 @ f_0000

;MDIO-9 @ f_1000

;MAC10 @ f_2000

;MDIO-10 @ f_3000

;EMI1 @ f_c000

;EMI2 @ f_d000

I'm also attaching an example TeraTerm macro I shared with another CAS member to read MDIO registers. His case was Linux but you can see the steps and modify Linux memory commands with u-boot memory commands.

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LS1046 Dual 10G XFI PHY MDIO problem

Re: LS1046 Dual 10G XFI PHY MDIO problem