Hello,
We want to make board with dual ethernet based on A20 - one 1Gbps and one
100Mbps.
We've prepared prototype board, but the dual ethernet is not working as
expected. On PA is connected
gigabit PHY and on PH - megabit. As you can guess GMAC and EMAC are enabled
simultaneously.
First to clarify, both MACs are working fine alone, so hardware problem is
unlikely possible. The two phys has
different addresses - 1 and 3. Here is the part of the dts we are
currently using:
sun7i-a20.dtsi:
emac_pins_b: emac0@1 {
pins = "PH8", "PH9", "PH10", "PH11",
"PH14", "PH15", "PH16", "PH17",
"PH18, ""PH19", "PH20", "PH21",
"PH22", "PH23", "PH24", "PH25",
"PH26", "PH27";
function = "emac";
};
xxxx.dts:
&emac {
pinctrl-names = "default";
pinctrl-0 = <&emac_pins_b>;
phy = <&phy1>;
status = "okay";
};
&emac_sram {
status = "okay";
};
&gmac {
pinctrl-names = "default";
pinctrl-0 = <&gmac_pins_rgmii_a>;
phy = <&phy3>;
phy-mode = "rgmii";
phy-supply = <®_vcc3v3>;
status = "okay";
phy3: ethernet-phy@3 {
reg = <3>;
};
};
...
&mdio {
phy-supply = <®_vcc3v3>;
status = "okay";
phy1: ethernet-phy@1 {
reg = <1>;
};
};
After boot, I get this log:
[ 3.703707] sun7i-dwmac 1c50000.ethernet: PTP uses main clock
[ 3.703719] sun7i-dwmac 1c50000.ethernet: no reset control found
[ 3.703889] sun7i-dwmac 1c50000.ethernet: Ring mode enabled
[ 3.703896] sun7i-dwmac 1c50000.ethernet: DMA HW capability register
supported
[ 3.703903] sun7i-dwmac 1c50000.ethernet: Normal descriptors
[ 3.704048] libphy: stmmac: probed
[ 4.301477] sun4i-emac 1c0b000.ethernet: using random MAC address 7e:94:
7b:31:bf:c4
[ 4.303733] sun4i-emac 1c0b000.ethernet: eth1: at f1182000, IRQ 29 MAC:
7e:94:7b:31:bf:c4
[ 11.844674] Micrel KSZ9031 Gigabit PHY stmmac-0:03: attached PHY driver [
Micrel KSZ9031 Gigabit PHY] (mii_bus:phy_addr=stmmac-0:03, irq=POLL)
[ 11.848890] sun7i-dwmac 1c50000.ethernet eth0: RX IPC Checksum Offload
disabled
[ 11.848926] sun7i-dwmac 1c50000.ethernet eth0: No MAC Management Counters
available
[ 11.848951] sun7i-dwmac 1c50000.ethernet eth0: PTP not supported by HW
[ 14.962832] sun7i-dwmac 1c50000.ethernet eth0: Link is Up - 1Gbps/Full -
flow control rx/tx
[ 16.471741] sun4i-emac 1c0b000.ethernet eth1: Link is Up - 100Mbps/Full -
flow control rx/tx
But none of the interfaces work.
root@olimex:~# cat /proc/net/dev
Inter-| Receive | Transmit
face |bytes packets errs drop fifo frame compressed multicast|bytes
packets errs drop fifo colls carrier compressed
bond0: 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0
lo: 20736 256 0 0 0 0 0 0 20736
256 0 0 0 0 0 0
eth1: 0 0 0 0 0 4 0 0 1534
9 0 0 0 0 0 0
eth0: 0 0 0 0 0 0 0 0 2778
15 0 0 0 0 0
As you can see the receive doesn't work. However if I force the GMAC to
work 100Mbps both interfaces work.
Same happens if I omit PH18 in the dts. In this case the GMAC "auto" goes
to 100Mbps.
[ 3.703765] sun7i-dwmac 1c50000.ethernet: PTP uses main clock
[ 3.703776] sun7i-dwmac 1c50000.ethernet: no reset control found
[ 3.703958] sun7i-dwmac 1c50000.ethernet: Ring mode enabled
[ 3.703966] sun7i-dwmac 1c50000.ethernet: DMA HW capability register
supported
[ 3.703973] sun7i-dwmac 1c50000.ethernet: Normal descriptors
[ 3.704102] libphy: stmmac: probed
[ 4.310098] sun4i-emac 1c0b000.ethernet: using random MAC address 62:1a:
55:37:03:c3
[ 4.312432] sun4i-emac 1c0b000.ethernet: eth1: at f1182000, IRQ 29 MAC:
62:1a:55:37:03:c3
[ 12.314605] Micrel KSZ9031 Gigabit PHY stmmac-0:03: attached PHY driver [
Micrel KSZ9031 Gigabit PHY] (mii_bus:phy_addr=stmmac-0:03, irq=POLL)
[ 12.318913] sun7i-dwmac 1c50000.ethernet eth0: RX IPC Checksum Offload
disabled
[ 12.318948] sun7i-dwmac 1c50000.ethernet eth0: No MAC Management Counters
available
[ 12.318972] sun7i-dwmac 1c50000.ethernet eth0: PTP not supported by HW
[ 15.442783] sun7i-dwmac 1c50000.ethernet eth0: Link is Up - 100Mbps/Full
- flow control rx/tx
[ 17.111725] sun4i-emac 1c0b000.ethernet eth1: Link is Up - 100Mbps/Full -
flow control rx/tx
I think there is something wrong with GRXCK and ERXCK. Maybe they are muxed
some way?
Can someone give some directions?
Best regards,
Stefan Mavrodiev
sssx
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