WL1835 bluetooth agent can't get default adapter

Ankur Tyagi

Other Parts Discussed in Thread: WL1835

Hi,

I am trying to use WL1835 bluetooth with AM335x EVM. Software is meta-arago daisy.

When I run bluetooth agent, I get error "Can't get default adapter"

Following is the sequence of commands:

root@am335x-evm:~# bluetoothd

root@am335x-evm:~# hciconfig hci0 up

[  944.008593] (stc):  chnl_id list empty :4
[  944.012749] (stk) : st_kim_start(stk) :ldisc_install = 1uim:poll broke due to event 10(PRI:2/ERR:8)

uim:read 1 from install

uim:@ st_uart_config
uim: signal received, opening /dev/ttyS1
uim:@ set_baud_rate
uim:set_baud_rate() done
uim:Setting speed to 3000000
uim:@ read_command_complete
uim: Command complete started
uim:@ read_hci_event
uim: read_hci_event
uim:Command complete done
[  944.180311] (stc): st_tty_open
uim:Speed changing to 3000000, 1
uim:@ set_custom_baud_rate
(stk) :line discipline installeduim:Installed N_TI_WL Line displine
[  944.194437] (stk) :TIInit_11.8.32.bts
uim:begin polling...
(stk) :change remote baud rate command in firmware
[  944.214516] (stk) :skipping the wait event of change remote baud[  944.928331] (stc): add_channel_to_table: id 4
[  944.932771] (stc): add_channel_to_table: id 2
[  944.937149] (stc): add_channel_to_table: id 3

root@am335x-evm:~# hcitool scan
Scanning ...
        00:02:72:E3:0F:7F       RS232 Dongle Slave

root@am335x-evm:~# agent hci0 00:02:72:E3:0F:7F
Can't get default adapter
No such adapter

root@am335x-evm:~# dmesg | grep Bluetooth
[    3.475348] Bluetooth: Core ver 2.18
[    3.483613] Bluetooth: HCI device and connection manager initialized
[    3.663793] Bluetooth: HCI socket layer initialized
[    3.668731] Bluetooth: L2CAP socket layer initialized
[    3.814838] Bluetooth: SCO socket layer initialized
[   16.667945] Bluetooth: st_register failed -22

What am I missing here ?

thanks
Ankur

over 10 years ago

0 Joseph Gigi over 10 years ago

TI__Guru* 85400 points

Hi Ankur,

We don't support the BlueZ stack. The supported stack is the TI Bluetooth Stack. Please see: processors.wiki.ti.com/.../WiLink8_Linux_Getting_Started_Guide

Any reason why you can't use the TI Bluetooth stack?

Having said that, the error you're getting is probably because dbus is not running or the service file is not present.

Regards,
Gigi Joseph.

0 Ankur Tyagi over 10 years ago in reply to Joseph Gigi

Expert 1020 points

Hi Joseph,

Thanks for the response.

I am building the rootfs using Yocto (meta-arago, daisy branch) and BlueZ is coming from there. meta-ti recipe itself includes BlueZ.

dbus is running but I will check for the service file.

regards
Ankur

0 Ankur Tyagi over 10 years ago in reply to Ankur Tyagi

Expert 1020 points

Hi Joseph,

I checked that dbus is running and service file is also present

root@am335x-evm:~# cat /usr/share/dbus-1/system-services/org.bluez.service
[D-BUS Service]
Name=org.bluez
Exec=/bin/false
User=root
SystemdService=dbus-org.bluez.service

root@am335x-evm:~# cat /etc/dbus-1/system.d/bluetooth.conf
<!-- This configuration file specifies the required security policies
     for Bluetooth core daemon to work. -->

<!DOCTYPE busconfig PUBLIC "-//freedesktop//DTD D-BUS Bus Configuration 1.0//EN"
 "www.freedesktop.org/.../busconfig.dtd">
<busconfig>

  <!-- ../system.conf have denied everything, so we just punch some holes -->
  <policy user="root">
    <allow own="org.bluez"/>
    <allow send_destination="org.bluez"/>
    <allow send_interface="org.bluez.Agent"/>
    <allow send_interface="org.bluez.PasskeyAgent"/>
  </policy>

  <policy context="default">
    <allow own="org.bluez"/>
    <allow send_destination="org.bluez"/>
    <allow send_interface="org.bluez.Agent"/>
  </policy>

</busconfig> 

root@am335x-evm:~#

When I run bluetoothd, I can see org.bluez in dbus list

root@am335x-evm:~# dbus-send --system --dest=org.freedesktop.DBus --type=method_call --print-reply /org/freedesktop/DBus org.freedesktop.DBus.ListNames

method return sender=org.freedesktop.DBus -> dest=:1.4 reply_serial=2
   array [
      string "org.freedesktop.DBus"
      string ":1.4"
      string ":1.0"
      string "org.bluez"
   ]

But when I query default adapter, I don't get a response

root@am335x-evm:~# dbus-send --system --print-reply --dest=org.bluez / org.bluez.Manager.ListAdapters

method return sender=:1.0 -> dest=:1.5 reply_serial=2
   array [
   ]

I seems there is something small which is missing here. It would be of great help if you can point it out

thanks

Ankur

0 Joseph Gigi over 10 years ago in reply to Ankur Tyagi

TI__Guru* 85400 points

Hi Ankur,

Is bluetoothd even running?
As I said before, this issue is not related to the TI controller, but to the BlueZ stack. You can get better support from some BlueZ forum (external).

Regards,
Gigi Joseph.

0 Ankur Tyagi over 10 years ago in reply to Joseph Gigi

Expert 1020 points

Hi Joseph,

Yes, bluetoothd and dbus are indeed running.

Thanks for your help, I will try some external forums

Wondering how other users of WL1835 are using it inside Linux. Are they are all using Bluetopia ?

If yes, then why doesn't TI package bluetopia as part of "meta-ti" Yocto project ? Because as of now, bluetopia is not part of meta-ti and blueZ doesn't work.

That means WL1835 support is broken !

regards

Ankur

0 Eran Zigman over 10 years ago in reply to Ankur Tyagi

TI__Intellectual 1910 points

Ankur,

BlueZ is open source while BlueTopia it doesn't. we can't upload the stack to the mainline and customers should get it from TI.com under click-wrap.

Working with BlueZ is fine as long as you don't need support. I believe BlueTopia will get you more and mostly someone to work with.

Regards,

Eran

0 Ankur Tyagi over 10 years ago in reply to Eran Zigman

Expert 1020 points

Thanks for your response Eran.

In case someone else like me wants to use BlueZ with WL18xx, disabling CONFIG_TI_ST, CONFIG_ST_HCI in kernel config and removing "kim" node in dts will get BlueZ working.

I am working on a BlueZ patch that will make WL18xx functional with BlueZ even with Shared Transport enabled (that would be ideal)

cheers

Ankur

0 Will Frazer over 10 years ago in reply to Ankur Tyagi

Prodigy 30 points

Hi Ankur,

Did you make any progress on the patch you mentioned above?

Also for your suggested work-around, any obvious downsides that you know about?

thanks,
Will

0 Ankur Tyagi over 10 years ago in reply to Will Frazer

Expert 1020 points

Hi Will,

Unfortunately I didn't get time to work on the patch.

For the work-around, I haven't seen any limitation yet. I am able to operate both Wi-Fi and BT at the same time.

cheers

Ankur

0 Will Frazer over 10 years ago in reply to Ankur Tyagi

Prodigy 30 points

Hi Ankur,

A work-around might be OK for me in that case, so I gave this a try earlier - unfortunately without success :0(

I see that in my kernel at least (3.14.43) the CONFIG_BT_WILINK depends on one of the 2 kernel configs that were removed above (probably CONFIG_TI_ST). This means that the bt_wilink driver is no longer available so UIM will not run & I no longer get hci0.

I also took out kim from the DTS (completely removed not renamed or other)

Did I misunderstand something?

Any hints greatly appreciated.

many thanks,

Will

0 Ankur Tyagi over 10 years ago in reply to Will Frazer

Expert 1020 points

Hi Will,

UIM and KIM are part of TI's shared transport layer which is disabled by removing CONFIG_TI_ST. These are BT specific config options in my kernel

#BT
CONFIG_BT=y
CONFIG_BT_RFCOMM=y
CONFIG_BT_RFCOMM_TTY=y
CONFIG_BT_HCIBTUSB=y
CONFIG_BT_HCIUART=y
CONFIG_BT_HCIUART_H4=y
CONFIG_BT_HCIUART_BCSP=y
CONFIG_BT_HCIUART_LL=y
CONFIG_BT_HCIBCM203X=y
CONFIG_BT_HCIBPA10X=y
CONFIG_BT_WILINK=m
CONFIG_TI_ST=n
CONFIG_ST_HCI=n

Now you have to use hciattach to create hci0. If you get timeout error, then do BT reset and retry. On AM335x-EVM kit, gpio 117 is connected to BT_EN. So these are the commands that I issue to run BT device.

bluetoothd
echo 117 > /sys/class/gpio/export
echo out > /sys/class/gpio/gpio117/direction
echo 0 > /sys/class/gpio/gpio117/value
echo 1 > /sys/class/gpio/gpio117/value
hciattach -s 115200 /dev/ttyS1 texas 3000000
hciconfig hci0 up piscan
hciconfig hci0 name my-bt
sdptool add SP
agent 0000 &

#As master
rfcomm watch rfcomm0 1 &

#Once connection established with slave
microcom /dev/rfcomm0

Hope that helps.

cheers

0 Will Frazer over 10 years ago in reply to Ankur Tyagi

Prodigy 30 points

Hi Ankur,

Just thought I'd follow up with a thank you. This worked fine for me meets my requirement.

regards,

Will

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WL1835 bluetooth agent can't get default adapter