AM3352: AM3352 Marvell 88E1510 Kernel Issue

Adam Gerken1

Part Number: AM3352

I'm having an issue with my eth0 interface once the kernel takes over. It works perfectly in u-boot, mdio commands are all good, etc.

SDK is 06.03.00.106 and I used a slightly modified (by menuconfig) tisdk_am335x-evm_defconfig to build

The errors I get from the kernel log:

[    1.749757] net eth0: initializing cpsw version 1.12 (0)
[    1.757608] net eth0: phy "/ocp/ethernet@4a100000/mdio@4a101000/ethernet-phy@0" not found on slave 0
[    1.773322] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready
[   11.792520] Waiting up to 110 more seconds for network.

All the other CPSW stuff seems to go ok:

[    1.223421] libphy: Fixed MDIO Bus: probed
[    1.302630] davinci_mdio 4a101000.mdio: davinci mdio revision 1.6, bus freq 1000000
[    1.310367] libphy: 4a101000.mdio: probed
[    1.316095] cpsw 4a100000.ethernet: Detected MACID = f4:e1:1e:a9:af:89
[    1.322992] cpsw 4a100000.ethernet: initialized cpsw ale version 1.4
[    1.329405] cpsw 4a100000.ethernet: ALE Table size 1024
[    1.334795] cpsw 4a100000.ethernet: cpts: overflow check period 500 (jiffies)

I'm thinking it's probably an issue with my fdt. I looked at several other boards with RGMII and don't see what's different. Here's the section(s) out of my dts:

cpsw_default: cpsw_default {
		pinctrl-single,pins = <
			/* Slave 1 */
			AM33XX_IOPAD(0x914, PIN_OUTPUT_PULLDOWN | MUX_MODE2)	/* mii1_txen.rgmii1_tctl */
			AM33XX_IOPAD(0x918, PIN_INPUT_PULLDOWN | MUX_MODE2)	/* mii1_rxdv.rgmii1_rctl */
			AM33XX_IOPAD(0x91c, PIN_OUTPUT_PULLDOWN | MUX_MODE2)	/* mii1_txd3.rgmii1_td3 */
			AM33XX_IOPAD(0x920, PIN_OUTPUT_PULLDOWN | MUX_MODE2)	/* mii1_txd2.rgmii1_td2 */
			AM33XX_IOPAD(0x924, PIN_OUTPUT_PULLDOWN | MUX_MODE2)	/* mii1_txd1.rgmii1_td1 */
			AM33XX_IOPAD(0x928, PIN_OUTPUT_PULLDOWN | MUX_MODE2)	/* mii1_txd0.rgmii1_td0 */
			AM33XX_IOPAD(0x92c, PIN_OUTPUT_PULLDOWN | MUX_MODE2)	/* mii1_txclk.rgmii1_tclk */
			AM33XX_IOPAD(0x930, PIN_INPUT_PULLDOWN | MUX_MODE2)	/* mii1_rxclk.rgmii1_rclk */
			AM33XX_IOPAD(0x934, PIN_INPUT_PULLDOWN | MUX_MODE2)	/* mii1_rxd3.rgmii1_rd3 */
			AM33XX_IOPAD(0x938, PIN_INPUT_PULLDOWN | MUX_MODE2)	/* mii1_rxd2.rgmii1_rd2 */
			AM33XX_IOPAD(0x93c, PIN_INPUT_PULLDOWN | MUX_MODE2)	/* mii1_rxd1.rgmii1_rd1 */
			AM33XX_IOPAD(0x940, PIN_INPUT_PULLDOWN | MUX_MODE2)	/* mii1_rxd0.rgmii1_rd0 */
		>;
	};

	cpsw_sleep: cpsw_sleep {
		pinctrl-single,pins = <
			/* Slave 1 reset value */
			AM33XX_IOPAD(0x914, PIN_INPUT_PULLDOWN | MUX_MODE7)
			AM33XX_IOPAD(0x918, PIN_INPUT_PULLDOWN | MUX_MODE7)
			AM33XX_IOPAD(0x91c, PIN_INPUT_PULLDOWN | MUX_MODE7)
			AM33XX_IOPAD(0x920, PIN_INPUT_PULLDOWN | MUX_MODE7)
			AM33XX_IOPAD(0x924, PIN_INPUT_PULLDOWN | MUX_MODE7)
			AM33XX_IOPAD(0x928, PIN_INPUT_PULLDOWN | MUX_MODE7)
			AM33XX_IOPAD(0x92c, PIN_INPUT_PULLDOWN | MUX_MODE7)
			AM33XX_IOPAD(0x930, PIN_INPUT_PULLDOWN | MUX_MODE7)
			AM33XX_IOPAD(0x934, PIN_INPUT_PULLDOWN | MUX_MODE7)
			AM33XX_IOPAD(0x938, PIN_INPUT_PULLDOWN | MUX_MODE7)
			AM33XX_IOPAD(0x93c, PIN_INPUT_PULLDOWN | MUX_MODE7)
			AM33XX_IOPAD(0x940, PIN_INPUT_PULLDOWN | MUX_MODE7)
		>;
	};

	davinci_mdio_default: davinci_mdio_default {
		pinctrl-single,pins = <
			/* MDIO */
			AM33XX_IOPAD(0x948, PIN_INPUT_PULLUP | SLEWCTRL_FAST | MUX_MODE0)	/* mdio_data.mdio_data */
			AM33XX_IOPAD(0x94c, PIN_OUTPUT_PULLUP | MUX_MODE0)			/* mdio_clk.mdio_clk */
		>;
	};

	davinci_mdio_sleep: davinci_mdio_sleep {
		pinctrl-single,pins = <
			/* MDIO reset value */
			AM33XX_IOPAD(0x948, PIN_INPUT_PULLDOWN | MUX_MODE7)
			AM33XX_IOPAD(0x94c, PIN_INPUT_PULLDOWN | MUX_MODE7)
		>;
	};

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

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

	ethphy0: ethernet-phy@0 {
		compatible = "marvell";
		reg = <0>;
	};
};

&cpsw_emac0 {
	phy-handle = <&ethphy0>;
	phy-mode = "rgmii-id";
};

I also went through the kernel's menuconfig and didn't see anything that jumped out at me, but the issue may also be there. I'm using a Marvell 88E1510 PHY.

Thank you!

Adam

over 4 years ago

0 Adam Gerken1 over 4 years ago

Intellectual 460 points

Rechecked in u-boot and it's definitely device 0:

=> mii info
PHY 0x00: OUI = 0x5043, Model = 0x1D, Rev = 0x01, 100baseT, FDX

=> mdio list
cpsw:
0 - Marvell 88E1518 <--> cpsw

Note, the 88E1510 and 88E1518 are the same thing with different IO voltages.

0 Adam Gerken1 over 4 years ago in reply to Adam Gerken1

Intellectual 460 points

Guess I just needed to talk it out with myself. The am335x sk has rgmii and goes about the dts slightly different and now it seems to be working.

Updated bit of dts for the record:

&mac {
	pinctrl-names = "default", "sleep";
	pinctrl-0 = <&cpsw_default>;
	pinctrl-1 = <&cpsw_sleep>;
	slaves = <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>, <0>;
	phy-mode = "rgmii";
};

Looks like it's just a difference in how u-boot and the kernel work.

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AM3352: AM3352 Marvell 88E1510 Kernel Issue