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Bluetooth can't scan

Other Parts Discussed in Thread: AM3517
1 hciattach -t 50 /dev/ttyS1 texas 3000000
Found a Texas Instruments' chip!
Firmware file : /lib/firmware/TIInit_7.2.31.bts
Loaded BTS script version 1
texas: changing baud rate to 3000000, flow control to 1
bts_next_action: not enough space to read next action
Device setup complete
2 hciconfig hci0 up 
3 hciconfig
  hci0:   Type: UART
        BD Address: 00:22:A5:B1:85:79 ACL MTU: 1021:4 SCO MTU: 180:4
        UP RUNNING
        RX bytes:352 acl:0 sco:0 events:10 errors:0
        TX bytes:45 acl:0 sco:0 commands:10 errors:0
4 hcitool scan
Scanning ...
no result. 
what i did are as follow,i do not know whether it is right
1        i am using am3517 som-m2
2        i use AM35x-OMAP35x-PSP-SDK-03.00.00.05 and AM3517_Linux_WiLink6-0_1-0-0_Patches ,
then i get uImage and u-boot.bin.
3         i get TIInit_7.2.31.bts from TI_Connectivity_Package_Firmware_InitScripts_RLS25.INC2.5-
25.INC2.5-Linux-x86-Install.tar.then copy it to /lib/firmware/
4          i use v2.01.03.11-WL6.1.3.1-1.0-Linux-x86-Install to generate bluetooth libs/tools ,then
i copy /v2.01.03.11-WL6.1.3.1/bluetooth/bin;v2.01.03.11-WL6.1.3.1/bluetooth/sbin;v2.01.03.11-WL6.1.3.1/bluetooth/lib to the corresponding directory 
of NFS.
any help will be appreciated.