Linux/AM4377: RGMII2 RX issue

guangzhao lv

Intellectual 275 points

Part Number: AM4377
Other Parts Discussed in Thread: AM4372

Tool/software: Linux

Dear Sir:

We make AM437X StarterKit EVM as reference board.

we use SDK ti-processor-sdk-linux-am437x-evm-04.03.00.05-Linux-x86-Install.bin

our custom board use gmii1 connected to PHY IC RTL8201F. Now it is eth0 interface, it is ok to ping PC via eth0.

our custom board use rgmii2 connected to PHY IC RTL8211F.Now it is eth1 interface. it fail to ping PC via eth1. we check the detail info.

we ping PC from target board. it can send ARP request to PC, PC receive the ARP Request, then reply to target board via eth1.

but board can't get any packet. RX show no any packets.

please help to show your advice. thank you very mcuh.

our device tree configuration as below:

am4372.dtsi

  mac: ethernet@4a100000 {
   compatible = "ti,am4372-cpsw","ti,cpsw";
   reg = <0x4a100000 0x800
          0x4a101200 0x100>;
   interrupts = <GIC_SPI 40 IRQ_TYPE_LEVEL_HIGH
          GIC_SPI 41 IRQ_TYPE_LEVEL_HIGH
          GIC_SPI 42 IRQ_TYPE_LEVEL_HIGH
          GIC_SPI 43 IRQ_TYPE_LEVEL_HIGH>;
   #address-cells = <1>;
   #size-cells = <1>;
   ti,hwmods = "cpgmac0";
   clocks = <&cpsw_125mhz_gclk>, <&cpsw_cpts_rft_clk>,
     <&dpll_clksel_mac_clk>;
   clock-names = "fck", "cpts", "50mclk";
   assigned-clocks = <&dpll_clksel_mac_clk>;
   assigned-clock-rates = <50000000>;
   status = "disabled";
   cpdma_channels = <8>;
   ale_entries = <1024>;
   bd_ram_size = <0x2000>;
   mac_control = <0x20>;
   slaves = <2>;
   active_slave = <0>;
   cpts_clock_mult = <0x80000000>;
   cpts_clock_shift = <29>;
   ranges;
   syscon = <&scm_conf>;

   davinci_mdio: mdio@4a101000 {
    compatible = "ti,am4372-mdio","ti,cpsw-mdio","ti,davinci_mdio";
    reg = <0x4a101000 0x100>;
    #address-cells = <1>;
    #size-cells = <0>;
    ti,hwmods = "davinci_mdio";
    bus_freq = <1000000>;
    status = "disabled";
   };

   cpsw_emac0: slave@4a100200 {
    /* Filled in by U-Boot */
    mac-address = [ 00 00 00 00 00 00 ];
   };

   cpsw_emac1: slave@4a100300 {
    /* Filled in by U-Boot */
    mac-address = [ 00 00 00 00 00 00 ];
   };

   phy_sel: cpsw-phy-sel@44e10650 {
    compatible = "ti,am43xx-cpsw-phy-sel";
    reg= <0x44e10650 0x8>;
    reg-names = "gmii-sel";
   };
  };

am437x-sk-evm.dts

cpsw_default: cpsw_default {
  pinctrl-single,pins = <
   /* Slave 1 */
   AM4372_IOPAD(0x92c, PIN_INPUT_PULLUP | MUX_MODE0) /* mii1_txclk.gmii1_txclk */
   AM4372_IOPAD(0x914, PIN_OUTPUT_PULLDOWN | MUX_MODE0) /* mii1_txen.gmii1_txen */
   AM4372_IOPAD(0x928, PIN_OUTPUT_PULLDOWN | MUX_MODE0) /* mii1_txd0.gmii1_txd0 */
   AM4372_IOPAD(0x924, PIN_OUTPUT_PULLDOWN | MUX_MODE0) /* mii1_txd1.gmii1_txd1 */
   AM4372_IOPAD(0x920, PIN_OUTPUT_PULLDOWN | MUX_MODE0) /* mii1_txd0.gmii1_txd2 */
   AM4372_IOPAD(0x91c, PIN_OUTPUT_PULLDOWN | MUX_MODE0) /* mii1_txd1.gmii1_txd3 */
   AM4372_IOPAD(0x930, PIN_INPUT_PULLUP | MUX_MODE0) /* mii1_rxclk.gmii1_rcclk */
   AM4372_IOPAD(0x918, PIN_INPUT_PULLUP | MUX_MODE0) /* mii1_rxdv.gmii1_rxdv */
   AM4372_IOPAD(0x940, PIN_INPUT_PULLUP | MUX_MODE0) /* mii1_rxd0.gmii1_rxd0 */
   AM4372_IOPAD(0x93c, PIN_INPUT_PULLUP | MUX_MODE0) /* mii1_rxd1.gmii1_rxd1 */
   AM4372_IOPAD(0x938, PIN_INPUT_PULLUP | MUX_MODE0) /* mii1_rxd0.gmii1_rxd2 */
   AM4372_IOPAD(0x934, PIN_INPUT_PULLUP | MUX_MODE0) /* mii1_rxd1.gmii1_rxd3 */
   AM4372_IOPAD(0x90c, PIN_INPUT_PULLUP | MUX_MODE0) /* mii1_crs.gmii1_crs */
   AM4372_IOPAD(0x910, PIN_INPUT_PULLUP | MUX_MODE0) /* mii1_rxerr.gmii1_rxer */
   AM4372_IOPAD(0x908, PIN_INPUT_PULLUP | MUX_MODE0) /* mii1_col.gmii1_col */

   /* Slave 2 */
   AM4372_IOPAD(0x858, PIN_OUTPUT_PULLDOWN | MUX_MODE2) /* gpmc_a6.rgmii2_tclk */
   AM4372_IOPAD(0x840, PIN_OUTPUT_PULLDOWN | MUX_MODE2) /* gpmc_a0.rgmii2_tctl */
   AM4372_IOPAD(0x854, PIN_OUTPUT_PULLDOWN | MUX_MODE2) /* gpmc_a5.rgmii2_td0 */
   AM4372_IOPAD(0x850, PIN_OUTPUT_PULLDOWN | MUX_MODE2) /* gpmc_a4.rgmii2_td1 */
   AM4372_IOPAD(0x84c, PIN_OUTPUT_PULLDOWN | MUX_MODE2) /* gpmc_a3.rgmii2_td2 */
   AM4372_IOPAD(0x848, PIN_OUTPUT_PULLDOWN | MUX_MODE2) /* gpmc_a2.rgmii2_td3 */
   AM4372_IOPAD(0x85c, PIN_INPUT_PULLUP | MUX_MODE2) /* gpmc_a7.rgmii2_rclk */
   AM4372_IOPAD(0x844, PIN_INPUT_PULLUP | MUX_MODE2) /* gpmc_a1.rgmii2_rtcl */
   AM4372_IOPAD(0x86c, PIN_INPUT_PULLUP | MUX_MODE2) /* gpmc_a11.rgmii2_rd0 */
   AM4372_IOPAD(0x868, PIN_INPUT_PULLUP | MUX_MODE2) /* gpmc_a10.rgmii2_rd1 */
   AM4372_IOPAD(0x864, PIN_INPUT_PULLUP | MUX_MODE2) /* gpmc_a9.rgmii2_rd2 */
   AM4372_IOPAD(0x860, PIN_INPUT_PULLUP | MUX_MODE2) /* gpmc_a8.rgmii2_rd3 */
  >;
};

cpsw_sleep: cpsw_sleep {
  pinctrl-single,pins = <
   /* Slave 1 reset value */
   AM4372_IOPAD(0x92c, PIN_INPUT_PULLDOWN | MUX_MODE7)
   AM4372_IOPAD(0x914, PIN_INPUT_PULLDOWN | MUX_MODE7)
   AM4372_IOPAD(0x928, PIN_INPUT_PULLDOWN | MUX_MODE7)
   AM4372_IOPAD(0x924, PIN_INPUT_PULLDOWN | MUX_MODE7)
   AM4372_IOPAD(0x920, PIN_INPUT_PULLDOWN | MUX_MODE7)
   AM4372_IOPAD(0x91c, PIN_INPUT_PULLDOWN | MUX_MODE7)
   AM4372_IOPAD(0x930, PIN_INPUT_PULLDOWN | MUX_MODE7)
   AM4372_IOPAD(0x918, PIN_INPUT_PULLDOWN | MUX_MODE7)
   AM4372_IOPAD(0x940, PIN_INPUT_PULLDOWN | MUX_MODE7)
   AM4372_IOPAD(0x93c, PIN_INPUT_PULLDOWN | MUX_MODE7)
   AM4372_IOPAD(0x938, PIN_INPUT_PULLDOWN | MUX_MODE7)
   AM4372_IOPAD(0x934, PIN_INPUT_PULLDOWN | MUX_MODE7)
   AM4372_IOPAD(0x90c, PIN_INPUT_PULLDOWN | MUX_MODE7)
   AM4372_IOPAD(0x910, PIN_INPUT_PULLDOWN | MUX_MODE7)
   AM4372_IOPAD(0x908, PIN_INPUT_PULLDOWN | MUX_MODE7)

   /* Slave 2 reset value */
   AM4372_IOPAD(0x858, PIN_INPUT_PULLDOWN | MUX_MODE7)
   AM4372_IOPAD(0x840, PIN_INPUT_PULLDOWN | MUX_MODE7)
   AM4372_IOPAD(0x854, PIN_INPUT_PULLDOWN | MUX_MODE7)
   AM4372_IOPAD(0x850, PIN_INPUT_PULLDOWN | MUX_MODE7)
   AM4372_IOPAD(0x84c, PIN_INPUT_PULLDOWN | MUX_MODE7)
   AM4372_IOPAD(0x848, PIN_INPUT_PULLDOWN | MUX_MODE7)
   AM4372_IOPAD(0x85c, PIN_INPUT_PULLDOWN | MUX_MODE7)
   AM4372_IOPAD(0x844, PIN_INPUT_PULLDOWN | MUX_MODE7)
   AM4372_IOPAD(0x86c, PIN_INPUT_PULLDOWN | MUX_MODE7)
   AM4372_IOPAD(0x868, PIN_INPUT_PULLDOWN | MUX_MODE7)
   AM4372_IOPAD(0x864, PIN_INPUT_PULLDOWN | MUX_MODE7)
   AM4372_IOPAD(0x860, PIN_INPUT_PULLDOWN | MUX_MODE7)
  >;
};

davinci_mdio_default: davinci_mdio_default {
  pinctrl-single,pins = <
   /* MDIO */
   AM4372_IOPAD(0x948, PIN_INPUT | SLEWCTRL_FAST | MUX_MODE0) /* mdio_data.mdio_data */
   AM4372_IOPAD(0x94c, PIN_OUTPUT | MUX_MODE0)   /* mdio_clk.mdio_clk */
  >;
};

davinci_mdio_sleep: davinci_mdio_sleep {
  pinctrl-single,pins = <
   /* MDIO reset value */
   AM4372_IOPAD(0x948, PIN_INPUT_PULLDOWN | MUX_MODE7)
   AM4372_IOPAD(0x94c, PIN_INPUT_PULLDOWN | MUX_MODE7)
  >;
};

&mac {
pinctrl-names = "default", "sleep";
pinctrl-0 = <&cpsw_default>;
pinctrl-1 = <&cpsw_sleep>;
dual_emac = <1>;
status = "okay";
};

&davinci_mdio {
pinctrl-names = "default", "sleep";
pinctrl-0 = <&davinci_mdio_default>;
pinctrl-1 = <&davinci_mdio_sleep>;
status = "okay";
};

&cpsw_emac0 {
phy_id = <&davinci_mdio>, <1>;
phy-mode = "mii";
dual_emac_res_vlan = <1>;
};

&cpsw_emac1 {
phy_id = <&davinci_mdio>, <4>;
phy-mode = "rgmii";
dual_emac_res_vlan = <2>;
};

Debug info as below:

root@am437x-evm:~# ifconfig
eth0      Link encap:Ethernet HWaddr 60:64:05:5D:3F:69
          UP BROADCAST MULTICAST MTU:1500 Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
          Interrupt:139

eth1      Link encap:Ethernet HWaddr 60:64:05:5D:3F:6B
          inet addr:192.168.1.4 Bcast:192.168.1.255 Mask:255.255.255.0
          inet6 addr: fe80::6264:5ff:fe5d:3f6b%763860/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:132 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:0 (0.0 B) TX bytes:23546 (22.9 KiB)

lo        Link encap:Local Loopback
          inet addr:127.0.0.1 Mask:255.0.0.0
          inet6 addr: ::1%763860/128 Scope:Host
          UP LOOPBACK RUNNING MTU:65536 Metric:1
          RX packets:14130 errors:0 dropped:0 overruns:0 frame:0
          TX packets:14130 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1
          RX bytes:1075424 (1.0 MiB) TX bytes:1075424 (1.0 MiB)

root@am437x-evm:~# ethtool eth1
Settings for eth1:
        Supported ports: [ TP MII ]
        Supported link modes:   10baseT/Half 10baseT/Full
                                100baseT/Half 100baseT/Full
                                1000baseT/Full
        Supported pause frame use: No
        Supports auto-negotiation: Yes
        Advertised link modes: 10baseT/Half 10baseT/Full
                                100baseT/Half 100baseT/Full
                                1000baseT/Full
        Advertised pause frame use: No
        Advertised auto-negotiation: Yes
        Link partner advertised link modes: 10baseT/Half 10baseT/Full
                                             100baseT/Half 100baseT/Full
        Link partner advertised pause frame use: Symmetric
        Link partner advertised auto-negotiation: Yes
        Speed: 100Mb/s
        Duplex: Full
        Port: MII
        PHYAD: 4
        Transceiver: external
        Auto-negotiation: on
        Supports Wake-on: d
        Wake-on: d
        Current message level: 0x00000000 (0)

        Link detected: yes
root@am437x-evm:~# ethtool -S eth1
NIC statistics:
     Good Rx Frames: 0
     Broadcast Rx Frames: 0
     Multicast Rx Frames: 0
     Pause Rx Frames: 0
     Rx CRC Errors: 0
     Rx Align/Code Errors: 337
     Oversize Rx Frames: 0
     Rx Jabbers: 0
     Undersize (Short) Rx Frames: 0
     Rx Fragments: 0
     Rx Octets: 0
     Good Tx Frames: 132
     Broadcast Tx Frames: 81
     Multicast Tx Frames: 51
     Pause Tx Frames: 0
     Deferred Tx Frames: 0
     Collisions: 0
     Single Collision Tx Frames: 0
     Multiple Collision Tx Frames: 0
     Excessive Collisions: 0
     Late Collisions: 0
     Tx Underrun: 0
     Carrier Sense Errors: 0
     Tx Octets: 24074
     Rx + Tx 64 Octet Frames: 59
     Rx + Tx 65-127 Octet Frames: 226
     Rx + Tx 128-255 Octet Frames: 129
     Rx + Tx 256-511 Octet Frames: 55
     Rx + Tx 512-1023 Octet Frames: 0
     Rx + Tx 1024-Up Octet Frames: 0
     Net Octets: 70621
     Rx Start of Frame Overruns: 0
     Rx Middle of Frame Overruns: 0
     Rx DMA Overruns: 0
     Rx DMA chan 0: head_enqueue: 1
     Rx DMA chan 0: tail_enqueue: 127
     Rx DMA chan 0: pad_enqueue: 0
     Rx DMA chan 0: misqueued: 0
     Rx DMA chan 0: desc_alloc_fail: 0
     Rx DMA chan 0: pad_alloc_fail: 0
     Rx DMA chan 0: runt_receive_buf: 0
     Rx DMA chan 0: runt_transmit_bu: 0
     Rx DMA chan 0: empty_dequeue: 0
     Rx DMA chan 0: busy_dequeue: 0
     Rx DMA chan 0: good_dequeue: 0
     Rx DMA chan 0: requeue: 0
     Rx DMA chan 0: teardown_dequeue: 0
     Tx DMA chan 0: head_enqueue: 132
     Tx DMA chan 0: tail_enqueue: 0
     Tx DMA chan 0: pad_enqueue: 0
     Tx DMA chan 0: misqueued: 0
     Tx DMA chan 0: desc_alloc_fail: 0
     Tx DMA chan 0: pad_alloc_fail: 0
     Tx DMA chan 0: runt_receive_buf: 0
     Tx DMA chan 0: runt_transmit_bu: 35
     Tx DMA chan 0: empty_dequeue: 132
     Tx DMA chan 0: busy_dequeue: 0
     Tx DMA chan 0: good_dequeue: 132
     Tx DMA chan 0: requeue: 0
     Tx DMA chan 0: teardown_dequeue: 0
root@am437x-evm:~#

over 7 years ago

0 guangzhao lv over 7 years ago

Intellectual 275 points

Dear Sir:
From the ethtool -S eth1 result,
we found that Rx Align/Code Errors: 337, there is no good RX frame.
we don't know why ?
can you give me some advice ?

0 Schuyler Patton over 7 years ago in reply to guangzhao lv

TI__Mastermind 40090 points

Hi,
This may be caused by the timing between the MAC and the PHY not matching up correctly. Could you please attach (not cut and paste) the board DTS and any DTSI file you have modified?
Best Regards,
Schuyler

0 guangzhao lv over 7 years ago in reply to Schuyler Patton

Intellectual 275 points

Dear Schuyler:

we have resolve this issue.

we enable TXCLK/RXCLK Delay with 2ns in PHY. After do this, it is OK to receive packets.

Thank you very much for your advice.

0 guangzhao lv over 7 years ago in reply to guangzhao lv

Intellectual 275 points

Dear Schuyler:

Why ther ethernet can't ping under u-boot ?
with our custom board, we have make ethernet work well under linux kernel.
but it does't work under u-boot.

it ping PC IP fail. it call cpsw_send to send arp packet, but we use wireshark to capture arp request in PC site.
but there is no any packet in PC Site with wireshark.

so i think it can send out any packet from target board.
we don't know the root cause.
can you give us some advice or some help ?

0 Schuyler Patton over 7 years ago in reply to guangzhao lv

TI__Mastermind 40090 points

Hi,
Could you please start another e2e thread? TI prefers to have a e2e post that handles a single issue. This is a new and different issue that you are working on. I am going to mark this one resolved.

In the new thread please answer this question which is if in the u-boot code you are using is if the cpsw port has been configured?

Best Regards,
Schuyler

0 guangzhao lv over 7 years ago in reply to Schuyler Patton

Intellectual 275 points

Dear Schuyler:
Originally, we have start a new e2e thread for the new question, but your colleague Biser said the new question is same with the current e2e thread. He close my new e2e thread, so i go back here to ask the new question.
please check the new thread e2e.ti.com/.../688069

0 Schuyler Patton over 7 years ago in reply to guangzhao lv

TI__Mastermind 40090 points

Hi,

Could you please attach a log of the u-boot console when you try to ping from the custom board? Was the cpsw port configured and DTS pin mux setup in u-boot?

Best Regards,
Schuyler

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Linux/AM4377: RGMII2 RX issue