I am struggling with a problem when bringing up the Bluetooth interface under Linux kernel 4.9.x for a WL1837MOD.
dmesg summary at boot:
Bluetooth: Core ver 2.22
Bluetooth: HCI device and connection manager initialized
Bluetooth: HCI socket layer initialized
Bluetooth: L2CAP socket layer initialized
Bluetooth: SCO socket layer initialized
(stk) :sysfs entries created
(stc): chnl_id list empty :4
(stk) : st_kim_start
(stk) :ldisc_install = 1
(stc): st_tty_open
(stk) :line discipline installed
(stk) :ti-connectivity/TIInit_11.8.32.bts
(stk) :change remote baud rate command in firmware
(stk) :skipping the wait event of change remote baud
Bluetooth: BNEP (Ethernet Emulation) ver 1.3
Bluetooth: BNEP filters: protocol multicast
Bluetooth: BNEP socket layer initialized
(stc): add_channel_to_table: id 4
(stc): add_channel_to_table: id 2
(stc): add_channel_to_table: id 3
'hciconfig' output:
hci0: Type: Primary Bus: UART
BD Address: A4:D5:78:10:A2:BC ACL MTU: 1021:6 SCO MTU: 180:4
DOWN
RX bytes:588 acl:0 sco:0 events:31 errors:0
TX bytes:402 acl:0 sco:0 commands:31 errors:0
Features: 0xff 0xfe 0x2d 0xfe 0xdb 0xff 0x7b 0x87
Packet type: DM1 DM3 DM5 DH1 DH3 DH5 HV1 HV2 HV3
Link policy: RSWITCH HOLD SNIFF
Link mode: SLAVE ACCEPT
When trying to bring the HCI 'up' I get the following error:
(stc): chnl_id 4 already registered Bluetooth: st_register failed -114
Can't init device hci0: Input/output error (5)
Anybody any ideas where I'm going wrong?