Re: SCO Support over USB

[Vivek Agarwal <vivek.mailinglists@gmail.com>]

Also i just wanted to confirm, with 2.6.29 and Bluez 4.33 you were
able to successfully record and play parallely since that would be
required by me to make and calls.

Thanks
Vivek

On Wed, Apr 8, 2009 at 3:20 PM, Vivek Agarwal
<vivek.mailinglists@gmail.com> wrote:
> Rajan,
> First of all thanks for replying,
> I had initially tried using 2.6.22 kernel with the Bluez 4.32.
> I was having problem in connecting to the device since i could not find
> any utility similar to passkey(for providing the key to the device) and
> utilities to connect to the device.
> Since i am using an embedded device, i wanted to use command line
> utilities to pair the device.
> Can u through some light on how have you used the 4.33 stack to
> connect to the headset.
>
> Thanks
> Vivek
>
> On Wed, Apr 8, 2009 at 2:04 PM, Rajan Batra <rajan.batra@gmail.com> wrote:
>> Hi,
>>  i had this same problem before. then when i used 2.6.29 kernel
>> i could do aplay and arecord. i used bluez 4.33.
>>
>> hope this helps.
>>
>>
>>
>> On Tue, Mar 31, 2009 at 7:06 PM, Vivek Agarwal
>> <vivek.mailinglists@gmail.com> wrote:
>>> Dear all,
>>>
>>> I want to use my bluetooth headset with my embedded platform using a
>>> bluetooth USB dongle.
>>> The main application is to be able to use it with a SIP application
>>> running on the embedded Platform..
>>>
>>> I am facing problems making to work.. I will try to explain the
>>> scenario in the mail below please help me where i am going wrong..
>>>
>>> First about the embedded platfrom, it is iMX31 based iMX31ADS
>>> evaluation board running 2.6.24 kernel.
>>>
>>> Step 1) I tried to compile the bluez-3.36 and enabled the hci_usb
>>> kernel module and checked using
>>> aplay if i am able to hear sound.
>>> I was not succcessful.
>>>
>>> Step 2) I tried putting the 2.6.27 bluetooth related changes into the
>>> 2.6.24 kernel and see if there changes make it work..
>>>
>>> I made all the bluetooth related files similar to the 2.6.27 kernel
>>> bluetooth files except hci_sysfs.c which i kept intact.
>>>
>>> Once i made these changes i was able to record and play individually
>>> but get the following problems
>>>        a) the get the following kernel messages when i try to play a .wav
>>> file using aplay..
>>>
>>>                hci_scodata_packet: hci0 SCO packet for unknown connection handle 5633
>>>                hci_scodata_packet: hci0 SCO packet for unknown connection handle 9985
>>>                hci_scodata_packet: hci0 SCO packet for unknown connection handle 49664
>>>                hci_scodata_packet: hci0 SCO packet for unknown connection handle 181
>>>                hci_scodata_packet: hci0 SCO packet for unknown connection handle 11264
>>>                hci_scodata_packet: hci0 SCO packet for unknown connection handle 32769
>>>                hci_scodata_packet: hci0 SCO packet for unknown connection handle 49153
>>>
>>>        b) i am not able to do an echo test using the following method. The
>>> dont hear any echo.
>>>                arecord -D bt_audio -f S16_LE | aplay -D bt_audio -f S16_LE
>>>        if the run the hcid in debug mode below are the debug messages..
>>>
>>>                hcid[1776]: Accepted new client connection on unix socket (fd=21)
>>>                        hcid[1776]: Audio API: received BT_GETCAPABILITIES_REQ
>>>                        hcid[1776]: Audio API: sending BT_GETCAPABILITIES_RSP
>>>                        hcid[1776]: Audio API: received BT_SETCONFIGURATION_REQ
>>>                        hcid[1776]: config sco - device = 00:0C:78:72:7E:13 access_mode = 1
>>>                        hcid[1776]: /org/bluez/audio/device2: Connecting to
>>> 00:0C:78:72:7E:13 channel 2
>>>                        hcid[1776]: State changed /org/bluez/audio/device2:
>>> HEADSET_STATE_DISCONNECTED -> HEADSET_STATE_CONNECT_IN_PROGRESS
>>>                        hcid[1776]: Accepted new client connection on unix socket (fd=23)
>>>                        hcid[1776]: Audio API: received BT_GETCAPABILITIES_REQ
>>>                        hcid[1776]: Audio API: sending BT_GETCAPABILITIES_RSP
>>>                        hcid[1776]: link_key_request (sba=00:80:98:98:71:10, dba=00:0C:78:72:7E:13)
>>>                        hcid[1776]: kernel auth requirements = 0x00
>>>                        hcid[1776]: stored link key type = 0x00
>>>                        hcid[1776]: /org/bluez/audio/device2: Connected to 00:0C:78:72:7E:13
>>>                        hcid[1776]: State changed /org/bluez/audio/device2:
>>> HEADSET_STATE_CONNECT_IN_PROGRESS -> HEADSET_STATE_CONNECTED
>>>                        hcid[1776]: State changed /org/bluez/audio/device2:
>>> HEADSET_STATE_CONNECTED -> HEADSET_STATE_PLAY_IN_PROGRESS
>>>                        hcid[1776]: SCO socket opened for headset /org/bluez/audio/device2
>>>                        hcid[1776]: SCO fd=24
>>>                        hcid[1776]: Audio API: sending BT_SETCONFIGURATION_RSP
>>>                        hcid[1776]: State changed /org/bluez/audio/device2:
>>> HEADSET_STATE_PLAY_IN_PROGRESS -> HEADSET_STATE_PLAYING
>>>                        hcid[1776]: Audio API: received BT_STREAMSTART_REQ
>>>                        hcid[1776]: Audio API: sending BT_STREAMSTART_RSP
>>>                        hcid[1776]: Audio API: sending BT_STREAMFD_IND
>>>                        hcid[1776]: Audio API: received BT_SETCONFIGURATION_REQ
>>>                        hcid[1776]: config sco - device = 00:0C:78:72:7E:13 access_mode = 2
>>>                        hcid[1776]: Audio API: sending BT_SETCONFIGURATION_RSP
>>>                        hcid[1776]: Audio API: received BT_STREAMSTART_REQ
>>>                        hcid[1776]: Audio API: sending BT_STREAMSTART_RSP
>>>                        hcid[1776]: Audio API: sending BT_STREAMFD_IND
>>>                        hcid[1776]: Unix client disconnected (fd=23)
>>>                        hcid[1776]: Unix client disconnected (fd=21)
>>>                        hcid[1776]: State changed /org/bluez/audio/device2:
>>> HEADSET_STATE_PLAYING -> HEADSET_STATE_CONNECTED
>>>                        hcid[1776]: State changed /org/bluez/audio/device2:
>>> HEADSET_STATE_CONNECTED -> HEADSET_STATE_DISCONNECTED
>>>
>>> Please help me resolve the 2 problems i am facing and do let me know
>>> if any one has tried connecting a bluetooth headset AT-BT220 to the
>>> system.
>>>
>>> Thanks
>>> Vivek
>>> L&T EmSyS.
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>>
>