AnsweredAssumed Answered

T2081 based custom board hangs on usb start

Question asked by Francesco Caiazzo on Feb 28, 2018
Latest reply on Jun 11, 2018 by Francesco Caiazzo


I'm trying to initialize usb controller in U-Boot, on a custom board, with usb start command. 

In the following the prints I have:


U-Boot 2016.092.0+ga06b209 (Feb 27 2018 - 19:46:07 +0100)

CPU0: T2081E, Version: 1.1, (0x85390011)
Core: e6500, Version: 2.0, (0x80400120)
Clock Configuration:
CPU0:1188 MHz, CPU1:1188 MHz, CPU2:1188 MHz, CPU3:1188 MHz,
CCB:594 MHz,
DDR:640 MHz (1280 MT/s data rate) (Asynchronous), IFC:594 MHz
FMAN1: 660 MHz
QMAN: 297 MHz
PME: 594 MHz
L1: D-cache 32 KiB enabled
I-cache 32 KiB enabled
Reset Configuration Word (RCW):
00000000: 1208000a 12000000 00000000 40000000
00000010: bc000002 00404000 58110000 21000000
00000020: 00000000 00000000 00000000 002237fc
00000030: 00000000 5000000d 00000000 00000009
Board: T2081-MFB, boot from SPI
SERDES Reference Clocks:
SD1_CLK1=100.00MHZ, SD1_CLK2=100.00MHZ
I2C: ready
SPI: ready
DRAM: 2 GiB (DDR3, 64-bit, CL=9, ECC off)
Flash: 0 Bytes
L2: 2 MiB enabled
Corenet Platform Cache: 512 KiB enabled
Using SERDES1 Protocol: 188 (0xbc)
SEC0: RNG instantiated
SF: Detected S25FL256S_64K with page size 256 Bytes, erase size 64 KiB, total 32 MiB
PCIe1: disabled
PCIe2: disabled
PCIe3: Root Complex, no link, regs @ 0xfe260000
PCIe3: Bus 00 - 00
PCIe4: Root Complex, no link, regs @ 0xfe270000
PCIe4: Bus 01 - 01
In: serial
Out: serial
Err: serial
FM1_DTSEC1: SGMII_1 on lane3(C)
FM1_DTSEC2: SGMII_2 on lane4(D)
SF: Detected S25FL256S_64K with page size 256 Bytes, erase size 64 KiB, total 32 MiB
Fman1: Uploading microcode version 106.4.18
Hit any key to stop autoboot: 0
=> usb start
starting USB...


at this point the processor seems to be blocked, I can't interact through neither UART nor Jtag and the only action I can perform is a board reboot.

If I configure USB node in device tree, the same happens on linux, when init task starts the configuration of usb controller.


The sources I used as starting point are the one for T2080RDB, and regarding USB configuration I didn't change anything.

Here attached you can find the schematics for USB interface (only USB0 is connected, the other one is simply unconnected).

I made a check about all the frequencies configured within the system and everyone seems to be within the ranges.

Input frequencies for the processor are SYSCLK=66MHz, DDRCLK=80MHz and SD1PLL1CLK=SD1PLL2CLK=100MHz.


I have no idea of the reasons of such behavior. I hope someone could help me.

If you need more informations, please ask me.