Bluez5.43 stack for bcm4334x chipset

Hi,
I am working on Bluez5.43 stack, cross compiled for ARM v7 and
successfully compiled. also ported into the target device. I am using
Broadcom bluetooth chip (BCM4334x)The problem is when i do a hciconfig
i am getting the following result

# hciconfig
hci0: Type: Primary  Bus: UART
BD Address: 72:8E:6C:AB:DD:A4  ACL MTU: 1021:8  SCO MTU: 64:1
DOWN
RX bytes:647 acl:0 sco:0 events:32 errors:0
TX bytes:407 acl:0 sco:0 commands:32 errors:0

1)  I am not able to scan any devices.  what could be the possible
causes ? In my other bluetooth device it is detected as Bluetooth USB
Host Controller

2) But I am expecting the following result
# hciconfig
hci0:   Type: BR/EDR  Bus: UART
        BD Address: C4:00:49:00:06:D9  ACL MTU: 1021:8  SCO MTU: 64:1
        UP RUNNING PSCAN ISCAN
        RX bytes:3640 acl:0 sco:0 events:317 errors:0
        TX bytes:43776 acl:0 sco:0 commands:311 errors:

What modifications I need to be done in hciattach_bcm4334x.c code
inorder to get the above output or I need to modify in some other
files of Bluez?

3) Is there any thing to do with this HCI type for scanning?

With Regards
Raja