rfkill is not used correctly when setup bluetooth with ap6212

[xiongyihui]

In ap6212-bluetooth, rfkill is not used correctly.

        rfkill unblock all
        echo "0" > /sys/class/rfkill/rfkill0/state
        echo "1" > /sys/class/rfkill/rfkill0/state

for Nanopi Neo Air and Orangepi Zero Plus2 H5, rfkill0 is Wi-Fi in the default settings of armbian

pi@nanopiair:~$ rfkill list
0: phy0: Wireless LAN
        Soft blocked: no
        Hard blocked: no

For Nanopi Neo Air, I tried to add bluetooth reset to rfkill using a dts file, but failed. The dts is:

/dts-v1/;
/plugin/;

/ {
    compatible = "allwinner,sun8i-h3";

    fragment@0 {
        target = <&pio>;
        __overlay__ {
            bt_pwr_pin: bt_pwr_pin@0 {
                pins = "PG13";
                function = "gpio_out";
            };
        };
    };

    fragment@1 {
        target-path = "/";
        __overlay__ {
            rfkill_bt {
                compatible = "rfkill-gpio";
                pinctrl-names = "default";
                pinctrl-0 = <&bt_pwr_pin>;
                reset-gpios = <&pio 6 13 1>;
                clocks = <&osc32k>;
                clock-frequency = <32768>;
                rfkill-name = "sunxi-bt";
                rfkill-type = "bluetooth";
            };
        };
    };
};

The command rfkill list doesn't have "sunxi-bt". Something should be missing in the dts file.
Any idea?

[igorpecovnik]

Bluetooth is in a bad shape in general so yes, its possible that things are missing. For me it's low priority ... but I guess once this should be sorted out. At least for AP6212, which is most common.

[xiongyihui]

It seems that we need a patch for rfkill-gpio to add bluetooth reset pin to rfkill-gpio

[igorpecovnik]

Some progress:

|  \| |/ _` | '_ \ / _ \| |_) | | | |_) | |
| |\  | (_| | | | | (_) |  __/| | |  _ <| |
|_| \_|\__,_|_| |_|\___/|_|   |_| |_| \_\_|
                                           

Welcome to ARMBIAN 5.82 user-built Ubuntu 18.04.2 LTS 4.19.36-sunxi   
System load:   0.00 0.00 0.00  	Up time:       31 min		
Memory usage:  8 % of 999MB  	IP:            
CPU temp:      33°C           	
Usage of /:    3% of 30G    	

Last login: Mon Apr 22 11:24:25 2019 from 10.0.10.42

root@nanopi:~# rfkill list
0: sunxi-bt: Bluetooth
	Soft blocked: no
	Hard blocked: no
1: phy0: Wireless LAN
	Soft blocked: no
	Hard blocked: no

[konkhra]

In Armbian Focal (mainline based kernel 5.10.y) the problem still persists. Bluetooth not working. Maybe something broken up and the question is what and where?

[msabatini-met]

Some progress:

|  \| |/ _` | '_ \ / _ \| |_) | | | |_) | |
| |\  | (_| | | | | (_) |  __/| | |  _ <| |
|_| \_|\__,_|_| |_|\___/|_|   |_| |_| \_\_|
                                           

Welcome to ARMBIAN 5.82 user-built Ubuntu 18.04.2 LTS 4.19.36-sunxi   
System load:   0.00 0.00 0.00  	Up time:       31 min		
Memory usage:  8 % of 999MB  	IP:            
CPU temp:      33°C           	
Usage of /:    3% of 30G    	

Last login: Mon Apr 22 11:24:25 2019 from 10.0.10.42

root@nanopi:~# rfkill list
0: sunxi-bt: Bluetooth
	Soft blocked: no
	Hard blocked: no
1: phy0: Wireless LAN
	Soft blocked: no
	Hard blocked: no

Hi, I took from https://www.armbian.com/orange-pi-zero-plus-2-h3/ the Buster image, and bluetooth is not working; is this patch supposed to be included in a new release?

[igorpecovnik]

is this patch supposed to be included in a new release?

If not in the release documents and if issue not closed with a commit, unlikely:
https://docs.armbian.com/Release_Changelog/

[walterjj]

Could we have a workaround in the while to make BLE work on a NanoPi NEO Air on Armbian 21.05.1 Focal with Linux 5.10.34-sunxi ? Thanyou!

[msabatini-met]

Give a look here to see how I found a solution:
https://forum.armbian.com/topic/18100-ap6212a-bt-not-working-on-orange-pi-zero-plus2-h3/
edit the ap6212-bluetooth script if needed for your platform.

[pyavitz]

To get this working on the NanoPi NEO Plus2, I created said patches: dts patch and rfkill-gpio patch

Compiled: brcm_patchram_plus
Added the following: firmware
Created said script: nanopi-bthelper

Followed by systemd service:

[Unit]
Description=Bluetooth Helper
Before=bluetooth.service

[Service]
Type=oneshot
ExecStart=/usr/local/sbin/nanopi-bthelper -s
ExecStop=/usr/local/sbin/nanopi-bthelper -k
RemainAfterExit=yes

[Install]
WantedBy=multi-user.target

rfkill list

0: sunxi-bt: Bluetooth
	Soft blocked: no
	Hard blocked: no
1: phy0: Wireless LAN
	Soft blocked: no
	Hard blocked: no
3: hci0: Bluetooth
	Soft blocked: no
	Hard blocked: no

bluetoothctl

Agent registered
[CHG] Controller 6C:0E:3E:BA:9A:56 Pairable: yes

This has been tested on Linux 5.14.14