LS1020A no work UART Rx

ilyaminaev — Tue, 22 May 2018 07:01:32 GMT

I'm trying to revive my motherboard with the processor LS1020A. I tried to start the operating system for the Tower Board, but it hangs randomly. Often hangs on the "startings of the kernel". Sometimes it is loaded with a Ubuntu wire, but then hangs randomly. Then I decided to download a small operating system RootFS. It is always loaded to the command line. But it does not react to my commands from uart. The converter works fine. Next, I bring the log from the debug board, where everything works, on my board. My circuit is different from the debugging board. I have otherwise connected Ethernet, there is no memory.

Original

U-Boot SPL 2015.01+ls1+g3281947 (Aug 18 2015 - 10:45:02)
U-Boot 2015.01+ls1+g3281947 (Aug 18 2015 - 10:45:02)
CPU: Freescale LayerScape LS1021E, Version: 2.0, (0x87081120)
Clock Configuration:
CPU0(ARMV7):1000 MHz,
Bus:300 MHz, DDR:800 MHz (1600 MT/s data rate),
Reset Configuration Word (RCW):
00000000: 0608000a 00000000 00000000 00000000
00000010: 70000000 00007900 e0025a00 21046000
00000020: 00000000 00000000 00000000 20000000
00000030: 00080000 881b7340 00000000 00000000
Board: LS1021ATWR
CPLD: V2.0
PCBA: V1.0
VBank: 0
I2C: ready
DRAM: 1 GiB
Using SERDES1 Protocol: 112 (0x70)
Flash: 128 MiB
MMC: FSL_SDHC: 0
PCIe1: Root Complex no link, regs @ 0x3400000
PCIe2: Root Complex no link, regs @ 0x3500000
In: serial
Out: serial
Err: serial
SEC0: RNG instantiated
SATA link 0 timeout.
AHCI 1.03 1 slots 1 ports ? Gbps 0x1 impl SATA mode
flags: 64bit ncq pm clo only pmp fbss pio slum part ccc
scanning bus for devices...
Found 0 device(s).
SCSI: Net: eTSEC2 is in sgmii mode.
eTSEC1 [PRIME], eTSEC2, eTSEC3

my board

U-Boot SPL 2015.01+ls1+g3281947 (Aug 18 2015 - 10:45:02)

U-Boot 2015.01+ls1+g3281947 (Aug 18 2015 - 10:45:02)

CPU: Freescale LayerScape LS1020, Version: 2.0, (0x87001020)
Clock Configuration:
CPU0(ARMV7):1000 MHz,
Bus:300 MHz, DDR:800 MHz (1600 MT/s data rate),
Reset Configuration Word (RCW):
00000000: 0608000a 00000000 00000000 00000000
00000010: 70000000 00007900 e0025a00 21046000
00000020: 00000000 00000000 00000000 20000000
00000030: 00080000 881b7340 00000000 00000000
Board: LS1021ATWR
CPLD: Vff.ff
PCBA: Vff.0
VBank: 1
I2C: ready
DRAM: 1 GiB
Using SERDES1 Protocol: 112 (0x70)
Flash: 0 Bytes
MMC: FSL_SDHC: 0
PCIe1: Root Complex no link, regs @ 0x3400000
PCIe2: Root Complex no link, regs @ 0x3500000
In: serial
Out: serial
Err: serial
SATA link 0 timeout.
AHCI 0001.0300 1 slots 1 ports ? Gbps 0x1 impl SATA mode
flags: 64bit ncq pm clo only pmp fbss pio slum part ccc
scanning bus for devices...
Found 0 device(s).
SCSI: Net: eTSEC2 is in sgmii mode.
Phy 2 not found
PHY reset timed out
Phy 1 not found
PHY reset timed out
eTSEC1 [PRIME], eTSEC2, eTSEC3
=>

Re: LS1020A no work UART Rx

Pavel — Wed, 23 May 2018 11:37:19 GMT

Usually incorrect memory configuration produces similar behavior. test memory on your board.

See the following pages about memory test under u-boot:

http://www.denx.de/wiki/publish/DULG/to-delete/UBootCmdGroupMemory.html

and

https://github.com/LeMaker/u-boot/blob/master/doc/README.memory-test

Have a great day,
Pavel Chubakov

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LS1020A no work UART Rx

Re: LS1020A no work UART Rx