Bug#947449: networking on Olimex Lime2 (Allwinner A20)

[Marek Nečada]

Hi,

Geert Stappers kirjoitti 27.12.2019 klo 19.24:
> Quoting https://linux-sunxi.org/Olimex_A20-OLinuXino-Lime2#GMAC_u-boot_config
> 
>  GMAC u-boot config
> 
>  From Revision H onward, the Lime2 comes with a Microchip KSZ9031
>  gigabit ethernet phyceiver. These need the following line added to the
>  u-boot config (in configs/A20-OLinuXino-Lime2_defconfig):
> 
>  CONFIG_GMAC_TX_DELAY=3
> 
>  Do not set this to another value but 3.
> 
>  This Microchip PHY chip is also getting significantly hotter than the
>  old Realtek RTL8201CP PHY. 
> 
> 
> Please report back how usefull this message was.

So I tried to build u-boot myself with the CONFIG_GMAC_TX_DELAY=3
directive, and I also tried to blindly copy the SPI+bootloader from an
Armbian image (in which the networking works properly), but in neither
case networking works (the other aspects are fine, the system boots
without problems, so I assume I did not break anything myself).

So I guess the issue lies elsewhere than in u-boot (perhaps the kernel?).

Marek

Bug#947449: networking on Olimex Lime2 (Allwinner A20)

[Geert Stappers]

On Fri, Dec 27, 2019 at 11:32:00AM +0200, Marek Nečada wrote:
> 
> See dmesg_install.out for the dmesg output obtained at the end of
> installation and dmesg_postinstall.out for the output of dmesg in the
> installed system. It seems the system does not attempt to bring eth0 up
> during the boot; the following lines appear only after manually running
> ip link set eth0 up (with ethernet cable connected):
> 
> [  671.988940] Micrel KSZ9031 Gigabit PHY stmmac-0:01: attached PHY driver 
> [Micrel KSZ9031 Gigabit PHY] (mii_bus:phy_addr=stmmac-0:01, irq=POLL)
> [  671.992969] sun7i-dwmac 1c5.ethernet eth0: No Safety Features support 
> found
> [  671.992989] sun7i-dwmac 1c5.ethernet eth0: RX IPC Checksum Offload 
> disabled
> [  671.993003] sun7i-dwmac 1c5.ethernet eth0: No MAC Management Counters 
> available
> [  671.993013] sun7i-dwmac 1c5.ethernet eth0: PTP not supported by HW
> [  671.993972] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready
> [  674.023384] sun7i-dwmac 1c5.ethernet eth0: Link is Up - 100Mbps/Full - 
> flow control rx/tx
> [  674.023444] IPv6: ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready
> 
> Then I get the Link is down / up messages correctly after the cable is
> disconnected / connected, but the network does not work nevertheless
> (dhclient does not get any response; I didn't try wireshark on the other
> end of the cable with the installed system, but I assume it's the same
> as with the installer).
> 
> Marek

> [0.00] Booting Linux on physical CPU 0x0
 ... about three hundred lines ...
> [   59.033184] EXT4-fs (sda3): mounted filesystem without journal. Opts: 
> (null)
> [   59.081628] ISO 9660 Extensions: Microsoft Joliet Level 3
> [   59.087948] ISO 9660 Extensions: RRIP_1991A
> [  130.574044] sun7i-dwmac 1c5.ethernet: PTP uses main clock
> [  130.574071] sun7i-dwmac 1c5.ethernet: no reset control found
> [  130.574139] sun7i-dwmac 1c5.ethernet: no regulator found
> [  130.579193] sun7i-dwmac 1c5.ethernet: Version ID not available
> [  130.579218] sun7i-dwmac 1c5.ethernet:  DWMAC1000
> [  130.579230] sun7i-dwmac 1c5.ethernet: DMA HW capability register 
> supported
> [  130.579238] sun7i-dwmac 1c5.ethernet: Normal descriptors
> [  130.579245] sun7i-dwmac 1c5.ethernet: Ring mode enabled
> [  130.614299] libphy: stmmac: probed
> [  130.614334] Micrel KSZ9031 Gigabit PHY stmmac-0:01: attached PHY driver 
> [Micrel KSZ9031 Gigabit PHY] (mii_bus:phy_addr=stmmac-0:01, irq=POLL)
> [  134.855343] Micrel KSZ9031 Gigabit PHY stmmac-0:01: attached PHY driver 
> [Micrel KSZ9031 Gigabit PHY] (mii_bus:phy_addr=stmmac-0:01, irq=POLL)
> [  134.858330] sun7i-dwmac 1c5.ethernet eth0: No Safety Features support 
> found
> [  134.858348] sun7i-dwmac 1c5.ethernet eth0: RX IPC Checksum Offload 
> disabled
> [  134.858362] sun7i-dwmac 1c5.ethernet eth0: No MAC Management Counters 
> available
> [  134.858371] sun7i-dwmac 1c5.ethernet eth0: PTP not supported by HW
> [  134.859201] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready
> [  138.491344] Micrel KSZ9031 Gigabit PHY stmmac-0:01: attached PHY driver 
> [Micrel KSZ9031 Gigabit PHY] (mii_bus:phy_addr=stmmac-0:01, irq=POLL)
> [  138.494285] sun7i-dwmac 1c5.ethernet eth0: No Safety Features support 
> found
> [  138.494304] sun7i-dwmac 1c5.ethernet eth0: RX IPC Checksum Offload 
> disabled
> [  138.494317] sun7i-dwmac 1c5.ethernet eth0: No MAC Management Counters 
> available
> [  138.494326] sun7i-dwmac 1c5.ethernet eth0: PTP not supported by HW
> [  138.494701] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready
> [  142.598048] sun7i-dwmac 1c5.ethernet eth0: Link is Up - 100Mbps/Full - 
> flow control rx/tx
> [  142.598127] IPv6: ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready

> [  671.988940] Micrel KSZ9031 Gigabit PHY stmmac-0:01: attached PHY driver 
> [Micrel KSZ9031 Gigabit PHY] (mii_bus:phy_addr=stmmac-0:01, irq=POLL)
> [  671.992969] sun7i-dwmac 1c5.ethernet eth0: No Safety Features support 
> found
> [  671.992989] sun7i-dwmac 1c5.ethernet eth0: RX IPC Checksum Offload 
> disabled
> [  671.993003] sun7i-dwmac 1c5.ethernet eth0: No MAC Management Counters 
> available
> [  671.993013] sun7i-dwmac 1c5.ethernet eth0: PTP not supported by HW
> [  671.993972] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready
> [  674.023384] sun7i-dwmac 1c5.ethernet eth0: Link is Up - 100Mbps/Full - 
> flow control rx/tx
> [  674.023444] IPv6: ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready
> [  738.624810] Micrel KSZ9031 Gigabit PHY stmmac-0:01: attached PHY driver 
> [Micrel KSZ9031 Gigabit PHY] (mii_bus:phy_addr=stmmac-0:01, irq=POLL)
> [  738.628507] sun7i-dwmac 1c5.ethernet eth0: No Safety Features support 
> found
> [  738.628525] sun7i-dwmac 1c5.ethernet eth0: RX IPC Checksum Offload 
> disabled
> [  738.628540] sun7i-dwmac 1c5.ethernet eth0: No MAC Management Counters 
> available
> [  738.628549] sun7i-dwmac 1c