bluez RFCOMM connect fail on arm platform

Bluez-users amateur 2 participants 3 messages Nov 30, 2006 – Dec 6, 2006 Bluetooth drivers

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amateur

author

2006-11-30 14:12 UTC #0 lore raw

Hi, All

I'm working on a project on arm platform (Cirrus EP9312 Board, Arm9) which utilized bluez. And I now encountered a problem: the rfcomm connection can't be established. Only occasionally can the rfcomm connection be established. I'm using a USB dongle with Broadcom bluetooth chip inside of hci version 2.0. This dongle works well on my Laptop with linux-iamge-2.6.18. So I don't think the problem lies in the bluetooth dongle.

My embeded arm platform runs the kernel 2.6.8-1 patched with patch from www.cirrus.com. But I don't think the patch file does anything related to bluetooth.

Is there any way to use the lastest bluetooth kernel source on a arm platform with kernel 2.6.8-1 ?

The typical output of hcidump is as following:

	~ # hcidump -x -V
	HCI sniffer - Bluetooth packet analyzer ver 1.30
	device: hci0 snap_len: 1028 filter: 0xffffffff
	< HCI Command: Create Connection (0x01|0x0005) plen 13
	    bdaddr 00:17:B0:B1:B2:CC ptype 0xcc18 rswitch 0x01 clkoffset 0x0000
	    Packet type: DM1 DM3 DM5 DH1 DH3 DH5
	> HCI Event: Command Status (0x0f) plen 4
	    Create Connection (0x01|0x0005) status 0x00 ncmd 1
	> HCI Event: Connect Complete (0x03) plen 11
	    status 0x00 handle 12 bdaddr 00:17:B0:B1:B2:CC type ACL encrypt 0x00
	< ACL data: handle 12 flags 0x02 dlen 12
	    L2CAP(s): Connect req: psm 3 scid 0x0040
	> HCI Event: Max Slots Change (0x1b) plen 3
	    handle 12 slots 5
	> ACL data: handle 12 flags 0x02 dlen 16
	    L2CAP(s): Connect rsp: dcid 0x0040 scid 0x0040 result 0 status 0
	      Connection successful
	< ACL data: handle 12 flags 0x02 dlen 16
	    L2CAP(s): Config req: dcid 0x0040 flags 0x00 clen 4
	      MTU 1024
	> ACL data: handle 12 flags 0x02 dlen 16
	    L2CAP(s): Config req: dcid 0x0040 flags 0x00 clen 4
	      MTU 32772
	< ACL data: handle 12 flags 0x02 dlen 14
	    L2CAP(s): Config rsp: scid 0x0040 flags 0x00 result 0 clen 0
	      Success
	> ACL data: handle 12 flags 0x02 dlen 17
	> ACL data: handle 12 flags 0x01 dlen 1
	    L2CAP(s): Config rsp: scid 0x0040 flags 0x00 result 0 clen 4
	      Success
	      MTU 1024
	< ACL data: handle 12 flags 0x02 dlen 8
	    L2CAP(d): cid 0x0040 len 4 [psm 3]
	      RFCOMM(s): SABM: cr 1 dlci 0 pf 1 ilen 0 fcs 0x1c
	> HCI Event: Number of Completed Packets (0x13) plen 5
	    handle 12 packets 4
	> ACL data: handle 12 flags 0x02 dlen 8
	    L2CAP(d): cid 0x0040 len 4 [psm 3]
	      RFCOMM(s): UA: cr 1 dlci 0 pf 1 ilen 0 fcs 0xd7
	< ACL data: handle 12 flags 0x02 dlen 18
	    L2CAP(d): cid 0x0040 len 14 [psm 3]
	      RFCOMM(s): PN CMD: cr 1 dlci 0 pf 0 ilen 10 fcs 0x70 mcc_len 8
	      dlci 18 frame_type 0 credit_flow 15 pri 7 ack_timer 0
	      frame_size 1019 max_retrans 0 credits 7
	> ACL data: handle 12 flags 0x02 dlen 18
	    L2CAP(d): cid 0x0040 len 14 [psm 3]
	      RFCOMM(s): PN RSP: cr 0 dlci 0 pf 0 ilen 10 fcs 0xaa mcc_len 8
	      dlci 18 frame_type 0 credit_flow 14 pri 7 ack_timer 0
	      frame_size 1019 max_retrans 0 credits 0
	< ACL data: handle 12 flags 0x02 dlen 8
	    L2CAP(d): cid 0x0040 len 4 [psm 3]
	      RFCOMM(s): SABM: cr 1 dlci 18 pf 1 ilen 0 fcs 0x32
	> HCI Event: Number of Completed Packets (0x13) plen 5
	    handle 12 packets 2
	
	
	
	/* it takes seconds here outputing nothing */
	
	
	
	
	< ACL data: handle 12 flags 0x02 dlen 8
	    L2CAP(d): cid 0x0040 len 4 [psm 3]
	      RFCOMM(s): DISC: cr 1 dlci 18 pf 1 ilen 0 fcs 0xd3
	< ACL data: handle 12 flags 0x02 dlen 8
	    L2CAP(d): cid 0x0040 len 4 [psm 3]
	      RFCOMM(s): DISC: cr 1 dlci 0 pf 1 ilen 0 fcs 0xfd
	< ACL data: handle 12 flags 0x02 dlen 12
	    L2CAP(s): Disconn req: dcid 0x0040 scid 0x0040
	> ACL data: handle 12 flags 0x02 dlen 8
	    L2CAP(d): cid 0x0040 len 4 [psm 3]
	      RFCOMM(s): UA: cr 1 dlci 18 pf 1 ilen 0 fcs 0xf9
	> ACL data: handle 12 flags 0x02 dlen 8
	    L2CAP(d): cid 0x0040 len 4 [psm 3]
	      RFCOMM(s): UA: cr 1 dlci 0 pf 1 ilen 0 fcs 0xd7
	> ACL data: handle 12 flags 0x02 dlen 12
	    L2CAP(s): Disconn rsp: dcid 0x0040 scid 0x0040
	> HCI Event: Number of Completed Packets (0x13) plen 5
	    handle 12 packets 3
	< HCI Command: Disconnect (0x01|0x0006) plen 3
	    handle 12 reason 0x13
	    Reason: Remote User Terminated Connection
	> HCI Event: Command Status (0x0f) plen 4
	    Disconnect (0x01|0x0006) status 0x00 ncmd 1
	> HCI Event: Disconn Complete (0x05) plen 4
	    status 0x00 handle 12 reason 0x16
	    Reason: Connection Terminated by Local Host

The output of hciconfig -a is:
hci0: Type: USB

        BD Address: 00:02:72:CA:DE:02 ACL MTU: 1017:8 SCO MTU: 64:0
        UP RUNNING PSCAN ISCAN
        RX bytes:71 acl:0 sco:0 events:8 errors:0
        TX bytes:31 acl:0 sco:0 commands:8 errors:0
        Features: 0xff 0xff 0x8d 0xfe 0x9b 0xf9 0x00 0x80
        Packet type: DM1 DM3 DM5 DH1 DH3 DH5 HV1 HV2 HV3
        Link policy:
        Link mode: SLAVE ACCEPT
        Name: 'BCM92045DG_Class1'
        Class: 0x000000
        Service Classes: Unspecified
        Device Class: Miscellaneous,
        HCI Ver: 2.0 (0x3) HCI Rev: 0x200a LMP Ver: 2.0 (0x3) LMP Subver: 0x4127
        Manufacturer: Broadcom Corporation (15)

Any tip or suggestion is welcome!
Thanks in advance!

Signature · 9 lines

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Marcel Holtmann

maintainer

2006-12-03 13:44 UTC #1 lore raw

Hi,

Quoted 11 lines

I'm working on a project on arm platform (Cirrus EP9312 Board, Arm9) which utilized bluez. And I now encountered a problem: the rfcomm connection can't be established. Only occasionally can the rfcomm connection be established. I'm using a USB dongle with Broadcom bluetooth chip inside of hci version 2.0. This dongle works well on my Laptop with linux-iamge-2.6.18. So I don't think the problem lies in the bluetooth dongle.
My embeded arm platform runs the kernel 2.6.8-1 patched with patch from www.cirrus.com. But I don't think the patch file does anything related to bluetooth.

first of all. The 2.6.8 kernel is ancient and you should switch to a 2.6.19 and make Cirrus provide their patch for it. Not following the upstream kernel releases is a bad behavior of embedded system providers and they should be punished for that by not buying their systems.

Quoted 62 lines

Is there any way to use the lastest bluetooth kernel source on a arm platform with kernel 2.6.8-1 ?

The typical output of hcidump is as following:

	~ # hcidump -x -V
	HCI sniffer - Bluetooth packet analyzer ver 1.30
	device: hci0 snap_len: 1028 filter: 0xffffffff
	< HCI Command: Create Connection (0x01|0x0005) plen 13
	    bdaddr 00:17:B0:B1:B2:CC ptype 0xcc18 rswitch 0x01 clkoffset 0x0000
	    Packet type: DM1 DM3 DM5 DH1 DH3 DH5
	> HCI Event: Command Status (0x0f) plen 4
	    Create Connection (0x01|0x0005) status 0x00 ncmd 1
	> HCI Event: Connect Complete (0x03) plen 11
	    status 0x00 handle 12 bdaddr 00:17:B0:B1:B2:CC type ACL encrypt 0x00
	< ACL data: handle 12 flags 0x02 dlen 12
	    L2CAP(s): Connect req: psm 3 scid 0x0040
	> HCI Event: Max Slots Change (0x1b) plen 3
	    handle 12 slots 5
	> ACL data: handle 12 flags 0x02 dlen 16
	    L2CAP(s): Connect rsp: dcid 0x0040 scid 0x0040 result 0 status 0
	      Connection successful
	< ACL data: handle 12 flags 0x02 dlen 16
	    L2CAP(s): Config req: dcid 0x0040 flags 0x00 clen 4
	      MTU 1024
	> ACL data: handle 12 flags 0x02 dlen 16
	    L2CAP(s): Config req: dcid 0x0040 flags 0x00 clen 4
	      MTU 32772
	< ACL data: handle 12 flags 0x02 dlen 14
	    L2CAP(s): Config rsp: scid 0x0040 flags 0x00 result 0 clen 0
	      Success
	> ACL data: handle 12 flags 0x02 dlen 17
	> ACL data: handle 12 flags 0x01 dlen 1
	    L2CAP(s): Config rsp: scid 0x0040 flags 0x00 result 0 clen 4
	      Success
	      MTU 1024
	< ACL data: handle 12 flags 0x02 dlen 8
	    L2CAP(d): cid 0x0040 len 4 [psm 3]
	      RFCOMM(s): SABM: cr 1 dlci 0 pf 1 ilen 0 fcs 0x1c
	> HCI Event: Number of Completed Packets (0x13) plen 5
	    handle 12 packets 4
	> ACL data: handle 12 flags 0x02 dlen 8
	    L2CAP(d): cid 0x0040 len 4 [psm 3]
	      RFCOMM(s): UA: cr 1 dlci 0 pf 1 ilen 0 fcs 0xd7
	< ACL data: handle 12 flags 0x02 dlen 18
	    L2CAP(d): cid 0x0040 len 14 [psm 3]
	      RFCOMM(s): PN CMD: cr 1 dlci 0 pf 0 ilen 10 fcs 0x70 mcc_len 8
	      dlci 18 frame_type 0 credit_flow 15 pri 7 ack_timer 0
	      frame_size 1019 max_retrans 0 credits 7
	> ACL data: handle 12 flags 0x02 dlen 18
	    L2CAP(d): cid 0x0040 len 14 [psm 3]
	      RFCOMM(s): PN RSP: cr 0 dlci 0 pf 0 ilen 10 fcs 0xaa mcc_len 8
	      dlci 18 frame_type 0 credit_flow 14 pri 7 ack_timer 0
	      frame_size 1019 max_retrans 0 credits 0
	< ACL data: handle 12 flags 0x02 dlen 8
	    L2CAP(d): cid 0x0040 len 4 [psm 3]
	      RFCOMM(s): SABM: cr 1 dlci 18 pf 1 ilen 0 fcs 0x32
	> HCI Event: Number of Completed Packets (0x13) plen 5
	    handle 12 packets 2

Quoted 8 lines

	/* it takes seconds here outputing nothing */
	
	
	
	
	< ACL data: handle 12 flags 0x02 dlen 8
	    L2CAP(d): cid 0x0040 len 4 [psm 3]
	      RFCOMM(s): DISC: cr 1 dlci 18 pf 1 ilen 0 fcs 0xd3

I am sorry, but that is not BlueZ fault. You are connection to RFCOMM channel 9 and the other side doesn't answer. We can only terminate the connection attempt after a timeout.

Regards

Marcel

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amateur

author

2006-12-06 17:26 UTC #2 lore raw

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