TJA1103 soft reset timeout and wrong phy address

[veljko_v]

Hello,
I'm trying to connect the TJA1103 evaluation board to my custom imx93 board. I get this error message on boot

Starting network: [    4.078772] usb 2-1: new high-speed USB device number 2 using ci_hdrc
[    4.168819] imx-dwmac 428a0000.ethernet eth0: Register MEM_TYPE_PAGE_POOL RxQ-0
[    4.439182] NXP C45 TJA1103 stmmac-1:01: nxp_c45_soft_reset failed: -110
[    4.446593] imx-dwmac 428a0000.ethernet eth0: __stmmac_open: Cannot attach to PHY (error: -110)
ip: SIOCSIFFLAGS: Connection timed out
FAIL

I am running a 6.12 linux kernel. 

CONFIG_NXP_C45_TJA11XX_PHY is enabled and my device tree entry looks like this:

&eqos {
    pinctrl-names = "default";
    pinctrl-0 = <&pinctrl_eqos>;
    phy-handle = <&ethphy1>;
    phy-mode = "rgmii";
    status = "okay";

    mdio {
        compatible = "snps,dwmac-mdio";
        #address-cells = <1>;
        #size-cells = <0>;
        clock-frequency = <5000000>;

       ethphy1: ethernet-phy@1 {
            compatible = "ethernet-phy-ieee802.3-c45";
            reg = <1>;
        };
    };
};

I found a thread saying there is a bug in the nxp-c45-tja11xx driver, I implemented the fix (one flag to true instead of false) but the issue still persists.

Another maybe connected issue is that with mdio tools, I see the address of the device as 2 (even though I set it to 1 using the jumpers on the eval board).

# mdio stmmac-1
 DEV      PHY-ID  LINK
0x02  0x001bb013  down

I tried a lot of different jumper configurations since I am no mdio expert. Master/slave mode, rgmii, rgmii-id etc. Nothing helps. Any insights would be very appreciated, thanks!

[joanxie]

it seems this issue isn't related to the imx93 side, you can refer to the link as Pavel mentioned

[veljko_v]

I'm sorry I don't know which link you are referring to nor who Pavel is?

[joanxie]

this link

https://community.nxp.com/t5/i-MX-Processors/NXP-C45-TJA11XX-Driver-Soft-Reset-Issue/m-p/2028298#M23...

[veljko_v]

As already mentioned, the patch is implemented but the error persists. And it doesn't solve the wrong address issue. I also observed that resetting the board sometimes leads to the change in the PHY address. The board is behaving very incosistent. This is the furthest I got at one moment, but reseting the device again just leads again to either error -19 or -110 .

[    2.380307] imx-dwmac 428a0000.ethernet: IRQ eth_lpi not found
[    2.386173] imx-dwmac 428a0000.ethernet: IRQ sfty not found
[    2.392701] imx-dwmac 428a0000.ethernet: User ID: 0x10, Synopsys ID: 0x52
[    2.399546] imx-dwmac 428a0000.ethernet: 	DWMAC4/5
[    2.404334] imx-dwmac 428a0000.ethernet: DMA HW capability register supported
[    2.411463] imx-dwmac 428a0000.ethernet: RX Checksum Offload Engine supported
[    2.418586] imx-dwmac 428a0000.ethernet: TX Checksum insertion supported
[    2.425281] imx-dwmac 428a0000.ethernet: Wake-Up On Lan supported
[    2.431423] imx-dwmac 428a0000.ethernet: Enable RX Mitigation via HW Watchdog Timer
[    2.439075] imx-dwmac 428a0000.ethernet: device MAC address 32:d1:4d:11:05:97
[    2.446202] imx-dwmac 428a0000.ethernet: Enabled L3L4 Flow TC (entries=8)
[    2.452977] imx-dwmac 428a0000.ethernet: Enabled RFS Flow TC (entries=10)
[    2.459765] imx-dwmac 428a0000.ethernet: Enabling HW TC (entries=256, max_off=256)
[    2.467321] imx-dwmac 428a0000.ethernet: Using 32/32 bits DMA host/device width
[    2.611033] imx-dwmac 428a0000.ethernet: IRQ eth_lpi not found
[    2.616884] imx-dwmac 428a0000.ethernet: IRQ sfty not found
[    2.623405] imx-dwmac 428a0000.ethernet: User ID: 0x10, Synopsys ID: 0x52
[    2.630203] imx-dwmac 428a0000.ethernet: 	DWMAC4/5
[    2.634986] imx-dwmac 428a0000.ethernet: DMA HW capability register supported
[    2.642108] imx-dwmac 428a0000.ethernet: RX Checksum Offload Engine supported
[    2.649231] imx-dwmac 428a0000.ethernet: TX Checksum insertion supported
[    2.655923] imx-dwmac 428a0000.ethernet: Wake-Up On Lan supported
[    2.662006] imx-dwmac 428a0000.ethernet: Enable RX Mitigation via HW Watchdog Timer
[    2.669657] imx-dwmac 428a0000.ethernet: device MAC address 92:8e:ee:e0:a7:37
[    2.676785] imx-dwmac 428a0000.ethernet: Enabled L3L4 Flow TC (entries=8)
[    2.683565] imx-dwmac 428a0000.ethernet: Enabled RFS Flow TC (entries=10)
[    2.690352] imx-dwmac 428a0000.ethernet: Enabling HW TC (entries=256, max_off=256)
[    2.697920] imx-dwmac 428a0000.ethernet: Using 32/32 bits DMA host/device width
[    4.746055] imx-dwmac 428a0000.ethernet eth0: Register MEM_TYPE_PAGE_POOL RxQ-0
[    4.791287] imx-dwmac 428a0000.ethernet eth0: PHY [stmmac-1:02] driver [NXP C45 TJA1103] (irq=POLL)
[    5.106134] usbcore: registered new interface driver cdc_ether
[    5.802180] imx-dwmac 428a0000.ethernet: Failed to reset the dma
[    5.808264] imx-dwmac 428a0000.ethernet eth0: stmmac_hw_setup: DMA engine initialization failed
[    5.816985] imx-dwmac 428a0000.ethernet eth0: __stmmac_open: Hw setup failed

[joanxie · Accepted solution]

sorry for my late, I've taken my annual leave this week, I don't find exist example for TJA1103 with imx93, but maybe you can refer to the attachment, if still failed, I will try to help you when I come back to office

[veljko_v]

Thank you for your response, and the attached example. I made it work, the main issue was I cross connected the Tx to Rx and vice versa. The correct connection is Tx - Tx and Rx - Rx
This was probably causing voltage fluctuations and pin strapping the phy address was unstable because of it.