How to setup Marvell bluetooth

How to setup Marvell bluetooth

Overview of How-To

This How-To is meant to be a starting point for people to learn how to setup the bluetooth on IGEP v2 devices as quickly and easily as possible.

Feedback and Contributing

At any point, if you see a mistake you can contribute to this How-To.

Setup basics

The IGEP v2 has built-in a Class 2 Bluetooth 2.0 + EDR device.

Class	Maximum Permitted Power mW (dBm)	Range (approximate)
Class 1	100 mW (20 dBm)	~100 meters
Class 2	2.5 mW (4 dBm)	~10 meters
Class 3	1 mW (0 dBm)	~1 meter

By default the WIFI-BT module is not configured for single antenna, so you need to configure this, set registers settings as follows:

Register offset	Register Name	8686 Bx
0x8000_A58C	BT Switch Control	0x40865
0x8000_A5A0	3/4W BCA mode config	0xD24D
0x8000_A5F0	BCA WLAN modes	0xA027181C

You need to be root to do this - sudo won't do!

# mount -t debugfs none /sys/kernel/debug

# cd /sys/kernel/debug/lbs_wireless/eth1/registers/ 

# echo "0xa58c 0x40865" > wrmac 
# echo "0xa5a0 0xd24d" > wrmac 
# echo "0xa5f0 0xa027181c" > wrmac

Next, you will need to load some bluetooth modules

# modprobe bluetooth
# modprobe hci_uart
# modprobe l2cap
# modprobe rfcomm
# dmesg
Bluetooth: Core ver 2.13
NET: Registered protocol family 31
Bluetooth: HCI device and connection manager initialized
Bluetooth: HCI socket layer initialized
Bluetooth: L2CAP ver 2.11
Bluetooth: L2CAP socket layer initialized
Bluetooth: BNEP (Ethernet Emulation) ver 1.3
Bluetooth: BNEP filters: protocol multicast
Bluetooth: RFCOMM socket layer initialized
Bluetooth: RFCOMM TTY layer initialized
Bluetooth: RFCOMM ver 1.10

With your preferred editor create a bluez.psr file like this

// PSKEY Parameters for Bluetooth RF
// (1) 0x0031 (PSKEY_LC_ENHANCED_POWER_TABLE)
&0031 = 0900 0000 3f00 4700 ec00 0f00 0000 3f00 4a00 f000 1600 0000 3f00 4d00 f400 1e00 0000 \
3f00 5000 f800 2600 0000 3f00 5500 fc00 2e00 0000 3f00 5b00 0000 3800 0000 3f00 6900 0400
// (2) 0x01f6 (PSKEY_ANA_FTRIM)
&01f6 = 001d
// (3) 0x01fe (PSKEY_ANA_FREQ)
&01fe = 6590    // 26MHz reference clock
// (4) 0x01be (PSKEY_UART_BAUDRATE)
&01be = 0x1d8  // 115200
// (5) 0x0028 (PSKEY_LC_COMBO_DISABLE_PIO_MASK)
&0028 = 0200 0000 0000
// (6) 0x002a (PSKEY_LC_COMBO_DOT11_CHANNEL_PIO_BASE)
&002a = 0011

And send the file using the bccmd tool.

# bccmd -t bcsp -d /dev/ttyS1 psload -r bluez.psr

Loading PSKEY_LC_ENHANCED_POWER_TABLE ... done
Loading PSKEY_ANA_FTRIM ... done
Loading PSKEY_ANA_FREQ ... done
Loading PSKEY_UART_BAUDRATE...done
Loading PSKEY_LC_COMBO_DISABLE_PIO_MASK ... done
Loading PSKEY_LC_COMBO_DOT11_CHANNEL_PIO_BASE ... done

Finally you can attach to device an scan for other bluetooth devices.

# hciattach -s 115200 /dev/ttyS1 bcsp 115200 noflow
# hciconfig hci0 up
# hciconfig hci0 piscan
# hciconfig -a hci0
hci0:	Type: UART
	BD Address: 00:02:5B:00:A5:A5 ACL MTU: 310:10 SCO MTU: 64:8
	UP RUNNING PSCAN ISCAN 
	RX bytes:1376 acl:0 sco:0 events:25 errors:0
	TX bytes:740 acl:0 sco:0 commands:24 errors:0
	Features: 0xff 0xff 0x8f 0xfe 0x9b 0xf9 0x00 0x80
	Packet type: DM1 DM3 DM5 DH1 DH3 DH5 HV1 HV2 HV3 
	Link policy: RSWITCH HOLD SNIFF PARK 
	Link mode: SLAVE ACCEPT 
	Name: 'igep0020b (0)'
	Class: 0x120112
	Service Classes: Networking, Object Transfer
	Device Class: Computer, Handheld
	HCI Ver: 2.0 (0x3) HCI Rev: 0xc5c LMP Ver: 2.0 (0x3) LMP Subver: 0xc5c
	Manufacturer: Cambridge Silicon Radio (10)
# hcitool -i hci0 scan
Scanning ...
        00:1E:A4:FC:EC:2E       Phone

For best performance you need to disable WIFI, you can do this

# echo 0 > /sys/class/gpio/gpio94/value

--- That's all folks ---