Raspberry Pi 3b Plus USB-Ethernet lan78xx_eth address not set

[Anand Moon]

Hi,

On Sun, 25 Feb 2024 at 12:25, Sourabh Hegde Ramu
<hrsourabh1107 at gmail.com> wrote:
>
> Hi Anand,
>
> Thanks for the update.
>
> Yes, I can set it manually. But this should be done by u-boot, right? Is there any reason why this is not happening on Pi 3b plus?
> I have other Raspberry Pi (4 & 3b) and they are working fine.
>
> Also, is this MAC address for LAN75xx or LAN78xx? The error message shows lan78xx_eth.
>

Most of the ethernet controllers get the MAC address via EPROM.
or they used some logic to set the MAC address.
check CONFIG_NET_RANDOM_ETHADDR this flag is needed for your device.

Thanks
-Anand
>
> On Sun, Feb 25, 2024, 06:50 Anand Moon <linux.amoon at gmail.com> wrote:
>>
>> Hi,
>>
>> On Sat, 24 Feb 2024 at 01:56, Sourabh Hegde Ramu
>> <hrsourabh1107 at gmail.com> wrote:
>> >
>> > Hello,
>> >
>> > I have a Raspberry Pi 3B Plus which I want to integrate with U-boot
>> > (v2023.10) .
>> >
>> > I am using rpi_3_32b_defconfig to generate u-boot.bin. But while booting I
>> > am getting below error
>> >
>> > Loading Environment from FAT... Unable to read "uboot.env" from mmc0:1...
>> > In:    serial,usbkbd
>> > Out:   serial,vidconsole
>> > Err:   serial,vidconsole
>> > Net:   No ethernet found.
>> > starting USB...
>> > Bus usb at 7e980000: USB DWC2
>> > scanning bus usb at 7e980000 for devices...
>> > Error: lan78xx_eth address not set.
>> > 3 USB Device(s) found
>> >        scanning usb for storage devices... 0 Storage Device(s) found
>> > Hit any key to stop autoboot:  0
>> >
>> > In the "bdinfo", "current eth" is not set
>> >
>> > U-Boot> bdinfo
>> > boot_params = 0x00000100
>> > DRAM bank   = 0x00000000
>> > -> start    = 0x00000000
>> > -> size     = 0x3b400000
>> > flashstart  = 0x00000000
>> > flashsize   = 0x00000000
>> > flashoffset = 0x00000000
>> > baudrate    = 115200 bps
>> > relocaddr   = 0x3b360000
>> > reloc off   = 0x3b358000
>> > Build       = 32-bit
>> > current eth = unknown
>> > eth-1addr   = (not set)
>> > IP addr     = <NULL>
>> >
>> > I also enabled LAN75xx in menuconfig and re-compiled u-boot. But still the
>> > same error.
>> >
>> > However on Raspberry Pi 3B, I don't see this error and "current eth" is set
>> > to "smsc95xx_eth" and "ethaddr" is also available.
>> >
>> > Can anyone please let me know the issue with Raspberry Pi 3b plus?
>> >
>> > Thanks in advance.
>>
>> Can you set the MAC address in boot environment?
>>
>> # setenv ethaddr 00:14:05:42:03:BB
>> # saveenv
>>
>> It should update the mac address for LAN75xx
>> printenv should display the mac address
>>
>> Thanks
>> -Anand