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Bug#864562: No ethernet link on Olimex A20-Olinuxino Micro Rev. J, possibly PHY driver problem

Cross-posted to 2 groups.

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On Fri, Jul 28, 2017 at 10:39:01PM +0200, Jean-Louis MOUNIER wrote:
> Hello Karsten,
> 
> thank you for your investigations and sorry for the delay : I have many
> lives...
> 
> here is the test result :
> 
>     U-Boot 2016.11+dfsg1-4 (Mar 27 2017 - 18:39:51 +0000) Allwinner Technology
> 
>     CPU:   Allwinner A20 (SUN7I)
>     Model: Olimex A20-Olinuxino Micro
>     I2C:   ready
>     DRAM:  1 GiB
>     MMC:   SUNXI SD/MMC: 0, SUNXI SD/MMC: 1
>     *** Warning - bad CRC, using default environment
> 
>     Setting up a 1024x768 vga console (overscan 0x0)
>     In:    serial
>     Out:   vga
>     Err:   vga
>     SCSI:  SATA link 0 timeout.
>     AHCI 0001.0100 32 slots 1 ports 3 Gbps 0x1 impl SATA mode
>     flags: ncq stag pm led clo only pmp pio slum part ccc apst
>     Net:   eth0: ethernet@01c50000
>     starting USB...
>     USB0:   USB EHCI 1.00
>     USB1:   USB OHCI 1.0
>     USB2:   USB EHCI 1.00
>     USB3:   USB OHCI 1.0
>     scanning bus 0 for devices... 1 USB Device(s) found
>     scanning bus 2 for devices... 1 USB Device(s) found
>     Hit any key to stop autoboot:  0
>     =>
>     =>
>     => gpio clear PA17
>     gpio: pin PA17 (gpio 17) value is 0
>     => dhcp
>     Speed: 100, full duplex
>     BOOTP broadcast 1
>     BOOTP broadcast 2
>     BOOTP broadcast 3
>     DHCP client bound to address 192.168.11.80 (1028 ms)
>     *** Warning: no boot file name; using 'C0A80B50.img'
>     Using ethernet@01c50000 device
>     TFTP from server 0.0.0.0; our IP address is 192.168.11.80; sending through
>     gateway 192.168.11.254
>     Filename 'C0A80B50.img'.
>     Load address: 0x42000000
>     Loading: *
>     TFTP error: 'File not found' (1)
>     Not retrying...
>     =>
> 
> As you can see, the gpio command make a change ! For information, the
> 192.168.11.80 network address and the gateway address are valid for my home
> network. The DHCP request did work fine !

Good, so we are on the right track.  Could you also try booting
Linux directly after running the "gpio clear PA17" in u-boot and
check whether the on-board ethernet works in this case?  To boot
linux from the u-boot command prompt, just enter the command
"run bootcmd".

This would show us whether the kernel explicitly sets PA17
somewhere or whether it just uses the state in which u-boot has
left the GPIO pin. If the latter, modifying u-boot should probably
be sufficient, otherwise we would need to patch both u-boot and
the kernel.

Regards,
Karsten
-- 
Gem. Par. 28 Abs. 4 Bundesdatenschutzgesetz widerspreche ich der Nutzung
sowie der Weitergabe meiner personenbezogenen Daten für Zwecke der
Werbung sowie der Markt- oder Meinungsforschung.

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Bug#864562: No ethernet link on Olimex A20-Olinuxino Micro Rev. J, possibly PHY driver problem Jean-Louis MOUNIER <jean-louis.mounier@laposte.net> - 2017-07-28 22:50 +0200
  Bug#864562: No ethernet link on Olimex A20-Olinuxino Micro Rev. J, possibly PHY driver problem Karsten Merker <merker@debian.org> - 2017-07-30 13:30 +0200

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