The strange printf information

did you plug a USB hub?  may I know your DM8168 PG version? it's better if you can provide full boot log

Hi,

   My custom board add GL850G-28 HUB Controller, and DM8168 is PG1.1.The more log as follows:

Starting kernel ...

Uncompressing Linux... done, booting the kernel.
Linux version 2.6.37 (root@ubuntu) (gcc version 4.3.2 (Wind River Linux Sourcery G++ 4.3-85) ) #2 Wed Mar 13 01:55:24 PDT 2013
CPU: ARMv7 Processor [413fc082] revision 2 (ARMv7), cr=10c53c7f
CPU: VIPT nonaliasing data cache, VIPT aliasing instruction cache
Machine: ti8168evm
bootconsole [earlycon0] enabled
reserved size = 0 at 0
Memory policy: ECC disabled, Data cache writeback
OMAP chip is TI8168 1.1
Built 1 zonelists in Zone order, mobility grouping on.  Total pages: 40640
Kernel command line: console=ttyO2,115200n8 root=/dev/nfs nfsroot=192.168.26.26:/nfsboot,nolock rw mem=160M earlyprintk rootdelay=4 ip=192.168.26.122:192.168.26.26:192.168.26.1:255.255.0.0:virtul-box:eth0:off
PID hash table entries: 1024 (order: 0, 4096 bytes)
Dentry cache hash table entries: 32768 (order: 5, 131072 bytes)
Inode-cache hash table entries: 16384 (order: 4, 65536 bytes)
Memory: 160MB = 160MB total
Memory: 157528k/157528k available, 6312k reserved, 0K highmem
Virtual kernel memory layout:
    vector  : 0xffff0000 - 0xffff1000   (   4 kB)
    fixmap  : 0xfff00000 - 0xfffe0000   ( 896 kB)
    DMA     : 0xffc00000 - 0xffe00000   (   2 MB)
    vmalloc : 0xca800000 - 0xf8000000   ( 728 MB)
    lowmem  : 0xc0000000 - 0xca000000   ( 160 MB)
    modules : 0xbf000000 - 0xc0000000   (  16 MB)
      .init : 0xc0008000 - 0xc0034000   ( 176 kB)
      .text : 0xc0034000 - 0xc043b000   (4124 kB)
      .data : 0xc043c000 - 0xc0478960   ( 243 kB)
SLUB: Genslabs=11, HWalign=64, Order=0-3, MinObjects=0, CPUs=1, Nodes=1
NR_IRQS:407
IRQ: Found an INTC at 0xfa200000 (revision 5.0) with 128 interrupts
Total of 128 interrupts on 1 active controller
GPMC revision 6.0
Trying to install interrupt handler for IRQ400
Trying to install interrupt handler for IRQ401
Trying to install interrupt handler for IRQ402
Trying to install interrupt handler for IRQ403
Trying to install interrupt handler for IRQ404
Trying to install interrupt handler for IRQ405
Trying to install interrupt handler for IRQ406
Trying to install type control for IRQ407
Trying to set irq flags for IRQ407
OMAP clockevent source: GPTIMER1 at 27000000 Hz
Console: colour dummy device 80x30
Calibrating delay loop... 986.31 BogoMIPS (lpj=4931584)
pid_max: default: 32768 minimum: 301
Security Framework initialized
Mount-cache hash table entries: 512
CPU: Testing write buffer coherency: ok
devtmpfs: initialized
omap_voltage_early_init: voltage driver support not added
regulator: core version 0.5
regulator: dummy:
NET: Registered protocol family 16
OMAP GPIO hardware version 0.1
OMAP GPIO hardware version 0.1
omap_mux_init: Add partition: #1: core, flags: 0
_omap_mux_get_by_name: Could not find signal i2c2_scl.i2c2_scl
_omap_mux_get_by_name: Could not find signal i2c2_sda.i2c2_sda
NOR: Can't request GPMC CS
registered ti816x_vpss device
pm_dbg_init: only OMAP3 supported
Registered ti81xx_fb device
ti816x_pcie: Invoking PCI BIOS...
ti816x_pcie: Setting up Host Controller...
ti816x_pcie: Register base mapped @0xca820000
ti816x_pcie: Starting PCI scan...
PCI: bus0: Fast back to back transfers enabled
bio: create slab <bio-0> at 0
vgaarb: loaded
SCSI subsystem initialized
usbcore: registered new interface driver usbfs
usbcore: registered new interface driver hub
usbcore: registered new device driver usb
omap_i2c omap_i2c.1: bus 1 rev4.0 at 100 kHz
omap_i2c omap_i2c.2: bus 2 rev4.0 at 100 kHz
Switching to clocksource gp timer
musb-hdrc: version 6.0, host, debug=0
musb-hdrc musb-hdrc.0: dma type: dma-cppi41
registerd cppi-dma Intr @ IRQ 17
Cppi41 Init Done
musb-hdrc: kernel must blacklist external hubs
musb-hdrc musb-hdrc.0: MUSB HDRC host driver
musb-hdrc musb-hdrc.0: new USB bus registered, assigned bus number 1
usb usb1: New USB device found, idVendor=1d6b, idProduct=0002
usb usb1: New USB device strings: Mfr=3, Product=2, SerialNumber=1
usb usb1: Product: MUSB HDRC host driver
usb usb1: Manufacturer: Linux 2.6.37 musb-hcd
usb usb1: SerialNumber: musb-hdrc.0
hub 1-0:1.0: USB hub found
hub 1-0:1.0: 1 port detected
musb-hdrc musb-hdrc.0: USB Host mode controller at ca80c000 using DMA, IRQ 18
musb-hdrc musb-hdrc.1: dma type: dma-cppi41
musb-hdrc: kernel must blacklist external hubs
musb-hdrc musb-hdrc.1: MUSB HDRC host driver
musb-hdrc musb-hdrc.1: new USB bus registered, assigned bus number 2
usb usb2: New USB device found, idVendor=1d6b, idProduct=0002
usb usb2: New USB device strings: Mfr=3, Product=2, SerialNumber=1
usb usb2: Product: MUSB HDRC host driver
usb usb2: Manufacturer: Linux 2.6.37 musb-hcd
usb usb2: SerialNumber: musb-hdrc.1
hub 2-0:1.0: USB hub found
hub 2-0:1.0: 1 port detected
musb-hdrc musb-hdrc.1: USB Host mode controller at ca81e800 using DMA, IRQ 19
NET: Registered protocol family 2
IP route cache hash table entries: 2048 (order: 1, 8192 bytes)
TCP established hash table entries: 8192 (order: 4, 65536 bytes)
TCP bind hash table entries: 8192 (order: 3, 32768 bytes)
TCP: Hash tables configured (established 8192 bind 8192)
TCP reno registered
UDP hash table entries: 256 (order: 0, 4096 bytes)
UDP-Lite hash table entries: 256 (order: 0, 4096 bytes)
NET: Registered protocol family 1
RPC: Registered udp transport module.
RPC: Registered tcp transport module.
RPC: Registered tcp NFSv4.1 backchannel transport module.
NetWinder Floating Point Emulator V0.97 (double precision)
sr1_fck HVT rate = 125000000
sr2_fck SVT rate = 125000000
SR NTarget value for HVT 0xa9f488
SR NTarget value for SVT 0xaab3cb
SmartReflex Driver initialized
omap-iommu omap-iommu.0: ducati registered
omap-iommu omap-iommu.1: sys registered
JFFS2 version 2.2. (NAND) © 2001-2006 Red Hat, Inc.
msgmni has been set to 307
io scheduler noop registered
io scheduler deadline registered
io scheduler cfq registered (default)
Serial: 8250/16550 driver, 4 ports, IRQ sharing enabled
omap_uart.0: ttyO0 at MMIO 0x48020000 (irq = 72) is a OMAP UART0
omap_uart.1: ttyO1 at MMIO 0x48022000 (irq = 73) is a OMAP UART1
omap_uart.2: ttyO2 at MMIO 0x48024000 (irq = 74) is a OMAP UART2
console [ttyO2] enabled, bootconsole disabled
console [ttyO2] enabled, bootconsole disabled
brd: module loaded
loop: module loaded
ahci ahci.0: forcing PORTS_IMPL to 0x3
ahci ahci.0: AHCI 0001.0100 32 slots 2 ports 3 Gbps 0x3 impl platform mode
ahci ahci.0: flags: ncq sntf pm led clo only pmp pio slum part ccc
scsi0 : ahci_platform
scsi1 : ahci_platform
ata1: SATA max UDMA/133 mmio [mem 0x4a140000-0x4a150fff] port 0x100 irq 16
ata2: SATA max UDMA/133 irq_stat 0x00400040, connection status changed irq 16
DM8168 jedec ID is ef4017
m25p80 spi1.0: found s25fl064k, expected w25x32
m25p80 spi1.0: s25fl064k (8192 Kbytes)
Creating 4 MTD partitions on "spi_flash":
0x000000000000-0x000000040000 : "U-Boot"
0x000000040000-0x000000042000 : "U-Boot Env"
0x000000042000-0x0000002c2000 : "Kernel"
0x0000002c2000-0x000000800000 : "File System"
omap2-nand driver initializing
NAND device: Manufacturer ID: 0x2c, Chip ID: 0xca (Micron )
Creating 5 MTD partitions on "omap2-nand.0":
0x000000000000-0x000000260000 : "U-Boot"
0x000000260000-0x000000280000 : "U-Boot Env"
0x000000280000-0x0000006c0000 : "Kernel"
0x0000006c0000-0x00000cee0000 : "File System"
0x00000cee0000-0x000010000000 : "Reserved"
davinci_mdio davinci_mdio.0: davinci mdio revision 1.6
davinci_mdio davinci_mdio.0: detected phy mask fffffffd
davinci_mdio.0: probed
davinci_mdio davinci_mdio.0: phy[1]: device 0:01, driver unknown
usbcore: registered new interface driver cdc_ether
usbcore: registered new interface driver dm9601
Initializing USB Mass Storage driver...
usbcore: registered new interface driver usb-storage
USB Mass Storage support registered.
mice: PS/2 mouse device common for all mice
i2c /dev entries driver
Linux video capture interface: v2.00
usbcore: registered new interface driver uvcvideo
USB Video Class driver (v1.0.0)
OMAP Watchdog Timer Rev 0x00: initial timeout 60 sec
PSTATE 1ff0000
usbcore: registered new interface driver usbhid
usbhid: USB HID core driver
TCP cubic registered
NET: Registered protocol family 17
VFP support v0.3: implementor 41 architecture 3 part 30 variant c rev 3
omap_voltage_late_init: Voltage driver support not added
drivers/rtc/hctosys.c: unable to open rtc device (rtc0)
ata1: SATA link down (SStatus 0 SControl 300)
ata2: SATA link down (SStatus 0 SControl 300)
davinci_mdio davinci_mdio.0: resetting idled controller
net eth0: attached PHY driver [Generic PHY] (mii_bus:phy_addr=0:01, id=282f014) davinci_emac.c
IP-Config: Complete:
     device=eth0, addr=192.168.26.122, mask=255.255.0.0, gw=192.168.26.1,
     host=virtul-box, domain=, nis-domain=(none),
     bootserver=192.168.26.26, rootserver=192.168.26.26, rootpath=
Waiting 4sec before mounting root device...
PHY: 0:01 - Link is Up - 1000/Full
VFS: Mounted root (nfs filesystem) on device 0:14.
devtmpfs: mounted
Freeing init memory: 176K
#
#
#
# usb 1-1: new full speed USB device using musb-hdrc and address 2
hub 1-0:1.0: unable to enumerate USB device on port 1
usb 1-1: new full speed USB device using musb-hdrc and address 3
hub 1-0:1.0: unable to enumerate USB device on port 1
usb 1-1: new full speed USB device using musb-hdrc and address 4
hub 1-0:1.0: unable to enumerate USB device on port 1
usb 1-1: new full speed USB device using musb-hdrc and address 5
hub 1-0:1.0: unable to enumerate USB device on port 1
usb 1-1: new full speed USB device using musb-hdrc and address 6
hub 1-0:1.0: unable to enumerate USB device on port 1
usb 1-1: new full speed USB device using musb-hdrc and address 7
hub 1-0:1.0: unable to enumerate USB device on port 1
usb 1-1: new full speed USB device using musb-hdrc and address 8
hub 1-0:1.0: unable to enumerate USB device on port 1
usb 1-1: new full speed USB device using musb-hdrc and address 9
hub 1-0:1.0: unable to enumerate USB device on port 1
usb 1-1: new full speed USB device using musb-hdrc and address 10
hub 1-0:1.0: unable to enumerate USB device on port 1
usb 1-1: new full speed USB device using musb-hdrc and address 11
hub 1-0:1.0: unable to enumerate USB device on port 1
usb 1-1: new full speed USB device using musb-hdrc and address 12
hub 1-0:1.0: unable to enumerate USB device on port 1
usb 1-1: new full speed USB device using musb-hdrc and address 13
hub 1-0:1.0: unable to enumerate USB device on port 1
usb 1-1: new full speed USB device using musb-hdrc and address 14
hub 1-0:1.0: unable to enumerate USB device on port 1
usb 1-1: new full speed USB device using musb-hdrc and address 15
usb 1-1: not running at top speed; connect to a high speed hub
usb 1-1: New USB device found, idVendor=05e3, idProduct=0608
usb 1-1: New USB device strings: Mfr=0, Product=1, SerialNumber=0
usb 1-1: Product: USB2.0 Hub
hub 1-1:1.0: USB hub found
hub 1-1:1.0: 4 ports detected

how to get rid of the printf infomation?

let me check first thing,    can you use usb device behind usb hub?

No, I do not use any USB device when this strange infomation occured.

According to http://www.ti.com/product/tms320dm8168, you can see following

the USB hub wasn't supported in 8168 with PG 1.x.

pls use PG 2.x