Busybox file system problem when starting up

HI
I was making my owe file system use busybox on TX2,It can work now,
But I Come across a problem
when the system starting up,the usb device
was not work Including mouse and keybord,it must wait about 1 minute ,
I don’t know where the problem is,could anayone help me?
Here is the log when system starting up

[    4.029210] tegra-vi4 15700000.vi: subdev ov5693 2-0036 bound
[    4.046847] mmc1 tuning done saved tap delay=20
[    4.046849] mmc1: hw tuning done ...
[    4.046855] mmc1: tuning_window[0]: 0xffffffff
[    4.046859] mmc1: tuning_window[1]: 0xffffe3ff
[    4.046864] mmc1: tuning_window[2]: 0xfe7fffff
[    4.046868] mmc1: tuning_window[3]: 0x7fffffff
[    4.046872] mmc1: tuning_window[4]: 0x0
[    4.046876] mmc1: tuning_window[5]: 0x0
[    4.046898] mmc1: tuning_window[6]: 0x0
[    4.046903] mmc1: tuning_window[7]: 0x0
[    4.046905] sdhci: Tap value: 20 | Trim value: 5
[    4.046908] sdhci: SDMMC_VENDOR_INTR_STATUS[0x108]: 0x40000
[    4.052483] mmc1: queuing unknown CIS tuple 0x91 (3 bytes)
[    4.052524] mmc1: new ultra high speed SDR104 SDIO card at address 0001
[    4.114331] tegra-usb-cd usb_cd: notification status (0x0, 0x1)
[    4.114334] tegra-usb-cd usb_cd: set current 0ma
[    4.114342] tegra-xudc-new 3550000.xudc: exiting ELPG
[    4.115341] tegra-xudc-new 3550000.xudc: exiting ELPG done
[    4.115344] tegra-xudc-new 3550000.xudc: device mode on
[    6.696932] tegradc 15210000.nvdisplay: hdmi: plugged
[    6.700760] EXT4-fs (mmcblk0p1): mounted filesystem with ordered data mode. Opts: (null)
[    6.700774] VFS: Mounted root (ext4 filesystem) on device 179:1.
[    6.701659] devtmpfs: mounted
[    6.701959] Freeing unused kernel memory: 1164K (ffffffc0010f5000 - ffffffc001218000)
[    6.701983] Freeing alternatives memory: 96K (ffffffc001218000 - ffffffc001230000)
<b>[    6.704976] btb inv war enabled (I must wait about 1 minute here)</b>

[   63.946523] xhci-tegra 3530000.xhci: cannot find firmware....retry after 1 second
[   64.965433] aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
[   64.980785] xhci-tegra 3530000.xhci: Firmware timestamp: 2017-12-07 10:50:08 UTC, Version: 55.09 release
[   65.001508] xhci-tegra 3530000.xhci: xHCI Host Controller
[   65.013217] xhci-tegra 3530000.xhci: new USB bus registered, assigned bus number 1
[   65.028113] xhci-tegra 3530000.xhci: hcc params 0x0184fd25 hci version 0x100 quirks 0x00010810
[   65.041786] xhci-tegra 3530000.xhci: irq 59, io mem 0x03530000
[   65.052760] usb usb1: New USB device found, idVendor=1d6b, idProduct=0002
[   65.061247] usb usb1: New USB device strings: Mfr=3, Product=2, SerialNumber=1
[   65.070186] usb usb1: Product: xHCI Host Controller
[   65.076784] usb usb1: Manufacturer: Linux 4.4.38 xhci-hcd
[   65.083919] usb usb1: SerialNumber: 3530000.xhci
[   65.090519] hub 1-0:1.0: USB hub found
[   65.096071] hub 1-0:1.0: 4 ports detected
[   65.114639] xhci-tegra 3530000.xhci: xHCI Host Controller
[   65.121892] xhci-tegra 3530000.xhci: new USB bus registered, assigned bus number 2
[   65.131367] usb usb2: New USB device found, idVendor=1d6b, idProduct=0003
[   65.139993] usb usb2: New USB device strings: Mfr=3, Product=2, SerialNumber=1
[   65.149049] usb usb2: Product: xHCI Host Controller
[   65.155780] usb usb2: Manufacturer: Linux 4.4.38 xhci-hcd
[   65.163041] usb usb2: SerialNumber: 3530000.xhci
[   65.169740] hub 2-0:1.0: USB hub found
[   65.175418] hub 2-0:1.0: 3 ports detected
[   65.181563] tegra-xotg xotg: otg: host 3530000.xhci registered
[   65.410357] usb 1-2: new high-speed USB device number 2 using xhci-tegra
[   65.554898] usb 1-2: feature bit otg_vbus_off set
[   65.571217] usb 1-2: New USB device found, idVendor=1a40, idProduct=0101
[   65.589680] usb 1-2: New USB device strings: Mfr=0, Product=1, SerialNumber=0
[   65.608656] usb 1-2: Product: USB 2.0 Hub
[   65.615226] xhci-tegra 3530000.xhci: tegra_xhci_mbox_work mailbox command 6
[   65.624348] hub 1-2:1.0: USB hub found
[   65.630179] hub 1-2:1.0: 4 ports detected
[   65.906355] usb 1-2.2: new high-speed USB device number 3 using xhci-tegra
[   66.111966] usb 1-2.2: New USB device found, idVendor=0781, idProduct=5581
[   66.130789] usb 1-2.2: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[   66.150162] usb 1-2.2: Product: Sandisk Ultra
[   66.166572] usb 1-2.2: Manufacturer: SanDisk
[   66.172994] usb 1-2.2: SerialNumber: A200531A9D02FF96
[   66.180638] xhci-tegra 3530000.xhci: tegra_xhci_mbox_work mailbox command 6
[   66.189902] usb-storage 1-2.2:1.0: USB Mass Storage device detected
[   66.198477] scsi host2: usb-storage 1-2.2:1.0
[   66.290321] usb 1-2.4: new full-speed USB device number 4 using xhci-tegra
[   66.414517] usb 1-2.4: New USB device found, idVendor=046d, idProduct=c534
[   66.433800] usb 1-2.4: New USB device strings: Mfr=1, Product=2, SerialNumber=0
[   66.453625] usb 1-2.4: Product: USB Receiver
[   66.460118] usb 1-2.4: Manufacturer: Logitech
[   66.469031] input: Logitech USB Receiver as /devices/3530000.xhci/usb1/1-2/1-2.4/1-2.4:1.0/0003:046D:C534.0001/input/input4
[   66.541329] hid-generic 0003:046D:C534.0001: input,hidraw0: USB HID v1.11 Keyboard [Logitech USB Receiver] on usb-3530000.xhci-2.4/input0
[   66.569607] input: Logitech USB Receiver as /devices/3530000.xhci/usb1/1-2/1-2.4/1-2.4:1.1/0003:046D:C534.0002/input/input5
[   66.640514] hid-generic 0003:046D:C534.0002: input,hidraw1: USB HID v1.11 Mouse [Logitech USB Receiver] on usb-3530000.xhci-2.4/input1
[   66.828642] xhci-tegra 3530000.xhci: tegra_xhci_mbox_work mailbox command 5
[   66.850402] xhci-tegra 3530000.xhci: tegra_xhci_mbox_work ignore firmware MBOX_CMD_DEC_SSPI_CLOCK request
[   67.203534] scsi 2:0:0:0: Direct-Access     SanDisk  Sandisk Ultra    PMAP PQ: 0 ANSI: 6
[   67.226517] sd 2:0:0:0: [sda] 30965760 512-byte logical blocks: (15.9 GB/14.8 GiB)
[   67.244742] sd 2:0:0:0: [sda] Write Protect is off
[   67.257849] sd 2:0:0:0: [sda] Write cache: disabled, read cache: enabled, doesn't support DPO or FUA
[   67.367980]  sda: sda1
[   67.388377] sd 2:0:0:0: [sda] Attached SCSI removable disk
[  605.158317] tegradc 15210000.nvdisplay: blank - normal

Could you have detail information how you build your own file system use busybox on TX2 and the version.

I build busybox on tx2 with command

#make menuconfig

Busybox Setting ----->
—Build Options ----->
Build static binary (no shared libs)

#make
#make install

reference the BLOG

https://www.cnblogs.com/Charles-Zhang-Blog/p/3419301.html

and the busybox version is busybox-1.29.2

https://busybox.net/downloads/busybox-1.29.2.tar.bz2

Looks like someone have build it on tegra without problem.

https://elinux.org/Jetson/Busybox_RootFS