NXP i.MX8QM TJA1101 AUTO-PHY link is not up

[vinothkumars]

Hi All,

I am working on Ethernet with IMX8QM Custom platform. 

Ethernet: TJA1101 AUTO-PHY

Board: IMX8QM Custom Platform

Got log,

[ 2.043859] fec 5b040000.ethernet: Adding to iommu group 1
[ 2.120525] fec 5b040000.ethernet: Invalid MAC address: 00:00:00:00:00:00
[ 2.127330] fec 5b040000.ethernet: Using random MAC address: 8a:c9:99:3f:4f:24
[ 2.145291] mdio_bus 5b040000.ethernet-1: MDIO device at address 1 is missing.
[ 2.152853] fec 5b040000.ethernet eth0: registered PHC device 0
[ 2.166432] hns3: Hisilicon Ethernet Network Driver for Hip08 Family - version
[ 2.200606] igb: Intel(R) Gigabit Ethernet Network Driver
[ 39.454726] NXP TJA1101 5b040000.ethernet-1:00: attached PHY driver [NXP TJA1101] (mii_bus:phy_addr=5b040000.ethernet-1:00, irq=POLL)

And link is not detected,

root@root:~# ifconfig eth0

eth0 Link encap:Ethernet HWaddr 8A:C9:99:3F:4F:24
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)

root@root:~# ethtool eth0
Settings for eth0:
Supported ports: [ TP ]
Supported link modes: 100baseT1/Full
Supported pause frame use: Symmetric
Supports auto-negotiation: No
Supported FEC modes: Not reported
Advertised link modes: 100baseT1/Full
Advertised pause frame use: Symmetric
Advertised auto-negotiation: No
Advertised FEC modes: Not reported
Speed: 100Mb/s
Duplex: Full
Auto-negotiation: off
master-slave cfg: forced master
Port: Twisted Pair
PHYAD: 0
Transceiver: external
MDI-X: Unknown
Supports Wake-on: g
Wake-on: d
Link detected: no
SQI: 0/7

I unable to get the ethernet link is up once connect ethernet cable with board and this is my configuration,

&fec1 {
     pinctrl-names = "default";
     pinctrl-0 = <&pinctrl_fec1>;
     phy-mode = "rmii";
     phy-handle = <&ethphy0>;
     fsl,magic-packet;
     /* nvmem-cells = <&fec_mac0>;
     nvmem-cell-names = "mac-address"; */
     status = "okay";
     local-mac-address = [32 9f 6f 77 0c 66];
     mdio {
          #address-cells = <1>;
          #size-cells = <0>;
         ethphy0: ethernet-phy@0 {
         compatible = "ethernet-phy-ieee802.3-c22";
         reg = <0>;
         /delete-property/ at803x,eee-disabled;
         /delete-property/at803x,vddio-1p8v;
         /delete-property/phy-supply;

         /* at803x,eee-disabled;
         at803x,vddio-1p8v;*/
         /*tja110x,refclk_in; */
       };

         ethphy1: ethernet-phy@1 {
         compatible = "ethernet-phy-ieee802.3-c22";
         reg = <1>;
         at803x,eee-disabled;
         at803x,vddio-1p8v;
       };
    };
};

pinctrl_fec1: fec1grp {
fsl,pins = <
        IMX8QM_COMP_CTL_GPIO_1V8_3V3_ENET_ENETB_PAD 0x000014a0
        IMX8QM_ENET0_MDC_CONN_ENET0_MDC 0x06000020
        IMX8QM_ENET0_MDIO_CONN_ENET0_MDIO 0x06000020
        IMX8QM_ENET0_RGMII_TX_CTL_CONN_ENET0_RGMII_TX_CTL 0x06000061
        IMX8QM_ENET0_RGMII_TXC_CONN_ENET0_RCLK50M_IN 0xce000061
        IMX8QM_ENET0_RGMII_TXD0_CONN_ENET0_RGMII_TXD0 0x06000061
        IMX8QM_ENET0_RGMII_TXD1_CONN_ENET0_RGMII_TXD1 0x06000061
        IMX8QM_ENET0_RGMII_RX_CTL_CONN_ENET0_RGMII_RX_CTL 0x06000061
        IMX8QM_ENET0_RGMII_RXD0_CONN_ENET0_RGMII_RXD0 0x06000061
        IMX8QM_ENET0_RGMII_RXD1_CONN_ENET0_RGMII_RXD1 0x06000061
        IMX8QM_ENET0_RGMII_RXD2_CONN_ENET0_RMII_RX_ER 0x0d000061
     >;
};

[AlfTeleco]

Hello, 

set your device as master like this: 

#echo 1 > /sys/devices/platform/soc@0/30800000.bus/30be0000.ethernet/mdio_bus/30be0000.ethernet-1/30be0000.ethernet-1:00/configuration/master_cfg

Regards

[vinothkumars]

Thank you @AlfTeleco ,

I already did, it is the hardware issue and resolve by the hardware engineer.

[AlfTeleco]

By the way, I am currently debugging an ethernet-phy problem. 

We are also using the TJA1101B in a setup with two custom IMX8MP boards.

Both are configured as AUTO_OP using pin strapping. 

Once they are at linux, one is set as master ( echo 1 > master_cfg ) and the other remains as slave. 

I assing IP to the eth0 iface and I can ping perfectly. 

The problem comes when I reset the slave-phy board, the system prompts this trace at boot:

#mdio_bus 30be0000.ethernet-1: MDIO device at address 0 is missing.

#fec 30be0000.ethernet eth0: Unable to connect to phy

It seems that as long as a link between phys exists, the slave will fail to be detected by the system at boot. 

Any idea on this? Thanks in advance!

[vinothkumars]

Hi @AlfTeleco ,

Defined mac address under uboot env. if problem still exists define mac address under linux dts

[igorpadykov]

Hi Vinothkumar

one can check "PHYADDRESS" settings as in example on p.23 SPF-29420 MCIMX8QM-CPU

schematic  MCIMX8QM-CPU MEK – Schematics

use below dts

https://source.codeaurora.org/external/imx/linux-imx/tree/arch/arm64/boot/dts/freescale/imx8qm-enet2...

Best regards
igor

[vinothkumars]

Thank you @igorpadykov for the reply,

Currently TJA1101 AUTO-PHY connect with phy0 of the IMX8QM custom board.

I am doubt about clock,

ENET0_REFCLK_125M_25M I cannot use because it is DNP.

For phy Master, Which one I have to configure (CLOCK_IN or CLOCK_OUT) ENET0_RGMII_TXC ?

IMX8QM_ENET0_RGMII_TXC_CONN_ENET0_RCLK50M_IN  

(or) 

IMX8QM_ENET0_RGMII_TXC_CONN_ENET0_RCLK50M_OUT

[vinothkumars · Accepted solution]

Hi,

Please close this ticket.

It is a hardware issue. 

The problem with Diode introduces in the following lines CONN_ETH_TRX_P and CONN_ETH_TRX_N for protection purpose because of that link is not detected.

After removing those two diodes, link is detected and ethernet is working.

[Amal_Antony3331]

Hi @vinothkumars 

I'm trying to integrate TJA1101 Phy with IMX8M Custom board as 2 -wire ethernet interface. I'm also not able to get the link up.

root@imx8mpevk:/opt/imx8-isp/bin# ethtool eth0
Settings for eth0:
        Supported ports: [ TP ]
        Supported link modes:   100baseT1/Full
        Supported pause frame use: Symmetric
        Supports auto-negotiation: No
        Supported FEC modes: Not reported
        Advertised link modes:  100baseT1/Full
        Advertised pause frame use: Symmetric
        Advertised auto-negotiation: No
        Advertised FEC modes: Not reported
        Speed: 100Mb/s
        Duplex: Full
        Auto-negotiation: off
        master-slave cfg: forced slave
        Port: Twisted Pair
        PHYAD: 0
        Transceiver: external
        MDI-X: Unknown
        Supports Wake-on: g
        Wake-on: d
        Link detected: no
        SQI: 0/7
root@imx8mpevk:/opt/imx8-isp/bin#

&fec {
        pinctrl-names = "default";
        pinctrl-0 = <&pinctrl_fec>;
        phy-mode = "rmii";
        phy-handle = <&ethphy1>;
        fsl,magic-packet;
        status = "okay";
        phy-reset-gpios = <&gpio3 0 0>;
        phy-reset-duration = <10>;

        mdio {
                #address-cells = <1>;
                #size-cells = <0>;

                ethphy1: ethernet-phy@0 {
                        compatible = "ethernet-phy-ieee802.3-c22";
                        reg = <0>;
                        tja110x,refclk_in;
                };
        };
};

       pinctrl_fec: fecgrp {
                fsl,pins = <
                        MX8MP_IOMUXC_SAI1_RXD2__ENET1_MDC               0x3
                        MX8MP_IOMUXC_SAI1_RXD3__ENET1_MDIO              0x3
                        MX8MP_IOMUXC_SAI1_RXD4__ENET1_RGMII_RD0         0x91
                        MX8MP_IOMUXC_SAI1_RXD5__ENET1_RGMII_RD1         0x91
                        MX8MP_IOMUXC_SAI1_TXD7__ENET1_TX_ER             0x1f
                        MX8MP_IOMUXC_SAI1_TXD4__ENET1_RGMII_TX_CTL      0x1f
                        MX8MP_IOMUXC_SAI1_TXD0__ENET1_RGMII_TD0         0x1f
                        MX8MP_IOMUXC_SAI1_TXD1__ENET1_RGMII_TD1         0x1f
                        MX8MP_IOMUXC_SAI1_TXFS__ENET1_RGMII_RX_CTL      0x91
                        MX8MP_IOMUXC_SAI1_TXD6__ENET1_RX_ER             0x1f
                        MX8MP_IOMUXC_SAI1_MCLK__ENET1_TX_CLK            0x3
/*                      MX8MP_IOMUXC_SAI1_RXD6__ENET1_RGMII_RD2         0x91 */
/*                      MX8MP_IOMUXC_SAI1_RXD7__ENET1_RGMII_RD3         0x91 */
/*                      MX8MP_IOMUXC_SAI1_TXC__ENET1_RGMII_RXC          0x91 */
/*                      MX8MP_IOMUXC_SAI1_TXD2__ENET1_RGMII_TD2         0x1f */
/*                      MX8MP_IOMUXC_SAI1_TXD3__ENET1_RGMII_TD3         0x1f */
/*                      MX8MP_IOMUXC_SAI1_TXD5__ENET1_RGMII_TXC         0x1f */
/*                      MX8MP_IOMUXC_SAI1_RXD0__GPIO4_IO02              0x19 */
                >;
        };

Im able to set the static IPs in 2 identical boards and not able to ping.

Is there any application/utility for read/write the PHY registers.

Also we have provided an ESD  and common mode filter . Could you please confirm if its the same case with yours?

Any help is appreciated.

Regards

Amal