GEM3 on ZCU102 Rev1.0 can't connect to phy

[welo_zhaw]

I would like to use the GEM3 on my ZCU102 board. Since I upgraded to Petalinux 2017.2, I could not get linux to use the ethernet on GEM3:

u-boot can use the ethernet fine, pinging works, DHCP works:

U-Boot 2017.01 (Aug 17 2017 - 08:18:24 +0200) Xilinx ZynqMP ZCU102 rev1.0

I2C:   Error, wrong i2c adapter 0 max 0 possible
Error, wrong i2c adapter 0 max 0 possible
ready
DRAM:  4 GiB
EL Level:       EL2
Chip ID:        xczu9eg
MMC:   sdhci@ff170000: 0 (SD)
SF: Detected n25q512a with page size 512 Bytes, erase size 128 KiB, total 128 MiB
*** Warning - bad CRC, using default environment

Error, wrong i2c adapter 0 max 0 possible
Error, wrong i2c adapter 0 max 0 possible
In:    serial
Out:   serial
Err:   serial
Bootmode: LVL_SHFT_SD_MODE1
Net:   ZYNQ GEM: ff0e0000, phyaddr c, interface rgmii-id
eth0: ethernet@ff0e0000
U-BOOT for xfft17

ethernet@ff0e0000 Waiting for PHY auto negotiation to complete....... done
BOOTP broadcast 1
BOOTP broadcast 2
BOOTP broadcast 3
BOOTP broadcast 4
BOOTP broadcast 5
DHCP client bound to address 192.168.4.32 (3769 ms)

U-boot says the phy address is 0xC and that's exactly what I put in `system-user.dtsi`, resulting in the following plnxaarch64_system.dts

		ethernet@ff0e0000 {
			compatible = "cdns,zynqmp-gem";
			status = "okay";
			interrupt-parent = <0x4>;
			interrupts = <0x0 0x3f 0x4 0x0 0x3f 0x4>;
			reg = <0x0 0xff0e0000 0x0 0x1000>;
			clock-names = "pclk", "hclk", "tx_clk", "rx_clk";
			#address-cells = <0x1>;
			#size-cells = <0x0>;
			#stream-id-cells = <0x1>;
			iommus = <0x7 0x877>;
			power-domains = <0xf>;
			clocks = <0x3 0x1f 0x3 0x34 0x3 0x30 0x3 0x34>;
			phy-mode = "rgmii-id";
			xlnx,ptp-enet-clock = <0x0>;
			phy-handle = <0x10>;

			phy@c {
				compatible = "88e1118r";
				device_type = "ethernet-phy";
				reg = <0xc>;
				ti,rx-internal-delay = <0x8>;
				ti,tx-internal-delay = <0xa>;
				ti,fifo-depth = <0x1>;
				linux,phandle = <0x10>;
				phandle = <0x10>;
			};
		};

Still, during kernel boot, kernel says it can't find the phy:

[    0.218081] iommu: Adding device fd500000.dma to group 0
[    0.218233] iommu: Adding device fd510000.dma to group 1
[    0.218378] iommu: Adding device fd520000.dma to group 2
[    0.218520] iommu: Adding device fd530000.dma to group 3
[    0.218665] iommu: Adding device fd540000.dma to group 4
[    0.218809] iommu: Adding device fd550000.dma to group 5
[    0.218950] iommu: Adding device fd560000.dma to group 6
[    0.219092] iommu: Adding device fd570000.dma to group 7
[    0.219381] iommu: Adding device ffa80000.dma to group 8
[    0.219523] iommu: Adding device ffa90000.dma to group 9
[    0.219666] iommu: Adding device ffaa0000.dma to group 10
[    0.219809] iommu: Adding device ffab0000.dma to group 11
[    0.219954] iommu: Adding device ffac0000.dma to group 12
[    0.220099] iommu: Adding device ffad0000.dma to group 13
[    0.220242] iommu: Adding device ffae0000.dma to group 14
[    0.220387] iommu: Adding device ffaf0000.dma to group 15
[    0.220639] iommu: Adding device ff0e0000.ethernet to group 16
[    0.221210] iommu: Adding device ff0f0000.spi to group 17
[    0.221663] iommu: Adding device ff170000.sdhci to group 18

...
[    2.807643] libphy: MACB_mii_bus: probed
[    2.811508] mdio_bus ff0e0000.etherne:0c: mdio_device_register
[    2.821245] macb ff0e0000.ethernet eth0: no PHY found

Any ideas how to fix this?

[nanz]

This seems fine. But I believe the phy-mode needs to be "sgmii" instead? Have you tried this?

[welo_zhaw]

The phy-mode is set to `rgmii-id` automatically by Petalinux and it also matches the mode that u-boot uses.

I have tried changing it to sgmii by overwriting it in system-user.dtsi, but I did not succeed.

[jenny_august13]

Can you share the system-user.dtsi file of yours?

[welo_zhaw]

Sure, please see the attached file..

[welo_zhaw]

When trying to set the phy-mode to sgmii:

&gem3 {
    phy-handle = <&phy0>;
    phy-mode = "sgmii";
    phy0: phy@c {
        compatible = "88e1118r";
        device_type = "ethernet-phy";
        reg = <0xc>;
        ti,rx-internal-delay = <0x8>;
        ti,tx-internal-delay = <0xa>;
        ti,fifo-depth = <0x1>;
    };
};

&smmu {
    status = "okay";
};

[stephenm]

Can you use the BSP for the ZCU102 in Petalinux:

petalinux-create -t project -s <path/to/bsp>

https://www.xilinx.com/support/download/index.html/content/xilinx/en/downloadNav/embedded-design-tools.html

[welo_zhaw]

The BSP works, I can use ethernet with that image.

I have now adopted the changes to the device tree, it now looks like this:

ethernet@ff0e0000 {
    compatible = "cdns,zynqmp-gem";
    status = "okay";
    interrupt-parent = <0x4>;
    interrupts = <0x0 0x3f 0x4 0x0 0x3f 0x4>;
    reg = <0x0 0xff0e0000 0x0 0x1000>;
    clock-names = "pclk", "hclk", "tx_clk", "rx_clk";
    #address-cells = <0x1>;
    #size-cells = <0x0>;
    #stream-id-cells = <0x1>;
    iommus = <0x7 0x877>;
    power-domains = <0xf>;
    clocks = <0x3 0x1f 0x3 0x34 0x3 0x30 0x3 0x34>;
    phy-mode = "rgmii-id";
    xlnx,ptp-enet-clock = <0x0>;
    phy-handle = <0x10>;
    pinctrl-names = "default";
    local-mac-address = [00 0a 35 00 13 77];

    phy@c {
        reg = <0xc>;
        ti,rx-internal-delay = <0x8>;
        ti,tx-internal-delay = <0xa>;
        ti,fifo-depth = <0x1>;
        ti,rxctrl-strap-worka;
        linux,phandle = <0x10>;
        phandle = <0x10>;
    };
};

The PHY seems to work now, but here's the next error message...

INIT: Entering runlevel: 5
Configuring network interfaces... [    4.285131] macb ff0e0000.ethernet eth0: Unable to allocate DMA memory (error -12)
ifconfig: SIOCSIFFLAGS: Cannot allocate memory

Any ideas?