Hi all,
We are working with the WiFi/BT combo module WM-BG-MR-03 of USI

 We have interfaced the Bluetooth module through UART to the OMAP3530
Processor and wifi through SDIO interface. Currently we are facing an
issue with the bluetooth interface.

 The device is  not  responding for BCSP/CSR protocol of bluez utility
(hciattach). When
 we probe the Serial line between the processor and the BT module, we
signal toggling in the tx line. Hence we feel that the initialisation
sequence is issued by the processor, but the BT module is not
responding to that.

We have tested the wifi module and its working. We are updating the
firmware using  sd8688_helper.bin and  sd8688.bin.

 running the below commands.

 #hciattach ttyS1 bcsp 115200
 #hciattach ttyS1 csr 115200

Both the results for above commands is
 "Initialisation timed out".

Please let me know have any one used this chip ?

has any one faced this problem?Please give ur suggestion.

Please also help us to debug.
With regards