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How KeyStone's NetCP is represented in keystone2_defconfig?

Amit Thakur
Intellectual 320 points

I am going through Keystone 2 defconfig file and wanted to know how NetCp support is provided in defconfig,For other vendors support for Ethernet controller has provided like below

CONFIG_NET_ETHERNET=y
CONFIG_SMSC911X=y

Above is how SMSC ethernet controller is support is provided in vexpress_defconfig file,In the same way how can 
I provide support for KeyStone 2 NetCp ethernet controller in  keystone2_defconfig?
  • 0
    TI__Guru 50170 points

    Hi, Amit,

    The NetCP is controlled through dts file. Please take a look at the k2hk-evm.dts file.

    Rex

  • 0 in reply to Rex Chang
    Intellectual 320 points

    Thanks Rex for your answer.

    With my Little understanding ,would like to know don't we require below lines to in order to enable KeyStone CPSW(Ethernet controller).

    CONFIG_NETDEVICES=y
    CONFIG_TI_DAVINCI_MDIO=y
    CONFIG_TI_CPTS=y

    In keystone_defconfig?

    Actully, I wanted to enable CPSW controller on some other SoC from TI.How should I go about it?

  • 0 in reply to Amit Thakur
    TI__Guru 50170 points

    Amit,

    For Keystone-2, by enabling CONFIG_TI_KEYSTONE_NET will enable NetCP, but for other platforms, it may not apply. You should check with that platform specifically.

    Those kconfig you mentioned enables the ethernet, not the NetCP.

    Rex

  • 0 in reply to Rex Chang
    Intellectual 320 points

    Ok,fine Rex.

    What I understood of your answer is,NetCP is the ethernet controller in keyston2,right?

    Also NetCp is consists of four modules as I read and CPSW is one of the component which is equivalent to the

    Tradition Ethernet controller and rest are PA and SA,right?

    Please correct if I am wrong.

  • 0 in reply to Amit Thakur
    TI__Guru 50170 points

    Amit,

    Yes, you understanding is correct. NetCP is more than a traditional Ethernet controller (MAC only NIC card) because it is MAC + Swtich (CPSW). The PA and SA are optional for the network. If special handling are needed, such as security, checksum offload, etc., then they need to be enabled.

    Rex

  • 0 in reply to Rex Chang
    Intellectual 320 points

    Thanks Rex ,your comments are indeed helpful.

    One final query regarding MAC+SWITCH(CPSW) ,Are these two davinci_emac.c and cpsw.c file contains the code

    for controlling MAC+SWITCH or there are some more files manages the Ethernet controller in keystone?

    Also,from IP layer packet will first come to CPSW and then forwarded to MAC layer,right?

    Thanks

    Amit

  • 0 in reply to Amit Thakur
    TI__Guru 50170 points

    Hi, Amit,

    Please take a look at the Makefile in which the files needed are under TI_KEYSTONE_NET. In the Makefile, it shows that cpsw.c is not used in Keystone-2, but cpsw_ale.c.

    I think the packets come in to MAC then to the switch.

    Rex