configure the serdes of ls1012a to base1000-KX mode.

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configure the serdes of ls1012a to base1000-KX mode.

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295320972
Contributor II

Hi team,
    The processor we are using is ls1012a, and the code used is open source flexbuild_lsdk1812_update_010719. I read the document "Document Number: LS1012ARM Rev. 2, 02/2019" and learned that the serdes of this processor can be configured in either SGMII or base1000-KX mode. The default configuration of open source software is SGMII mode. Now I want to configure serdes to base1000-KX mode. The 28.7.1.3 1000Base-KX chapter of LS1012ARM document has detailed configuration steps. But I don't know how to read and write the following registers(The following steps are taken from the configuration of the base1000-KX mode in the LS1012ARM documentation.):

       4. Initialize 1000Base-KX (Clause 45) AN Advertisement Register 1:
               TX_NONCE=unique value per device
       5. Read 1000Base-KX (Clause 45) AN Status Register to clear any previous status
       6. Initialize 1000Base-KX (Clause 45) AN Control Register to 0x1200:
                  AN_ENAB=1
                  RST_AN=1

My question is as follows:

1.Can I use the pfe_phy_read and pfe_phy_write functions in uboot in open source code to do this?The path of these two functions in uboot is drivers\net\pfe_eth\pfe_mdio.c

2.If I can use these two functions to do this, what parameters do I need to pass to these two functions (I have tried several, but did not succeed)?

3.If I can't use these two functions to do the above, what do I need to do?

Thanks!

      

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ufedor
NXP TechSupport
NXP TechSupport

Please explain why you need a solution as U-Boot commands sequence.

For linux the solution is to modify DTS - please refer to the following Community question:

https://community.nxp.com/thread/501212 

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295320972
Contributor II

Hi ufedor,
     My application is very similar to this one.Serdes is a MAC to MAC interface without an external PHY.
What you mean is that I only need to remove "fsl,gemac-phy-id" and use "fixed-link" property to replace it in DTS?
In linux, is serdes configured to 1000Base-KX mode in this case?

Thanks,

Li

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ufedor
NXP TechSupport
NXP TechSupport

Yes.

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295320972
Contributor II

Hi ufedor,

      

  Thank you for your support, this issue has been resolved.I not only need to configure the network in DTS to work as fixed-link, but also need to set phy-mode to 1000Base-X.I read the kernel source carefully. In this configuration, the registers described in Section 28.6 (Document Number: LS1012ARM Rev. 2, 02/2019) will use the default values.According to this logical reasoning, is the register configuration by default configured to 1000Base-KX mode?
Thanks,
    
  Li
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ufedor
NXP TechSupport
NXP TechSupport

You wrote:

> to set phy-mode to 1000Base-X

What exactly you have done?

Which LSDK version was used?

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