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libbt supports to configure some key parameters with conf file in default path /vendor/etc/bluetooth/bt_vendor.conf

use "key = value" to set parameters in conf file

optional keys are listed below:

	mchar_port: port path used by Uart interface, the default BT uart port in libbt is /dev/ttyUSB0 
                          if it's not the same as default port, could set mchar_port in conf file like below
                          mchar_port = /dev/ttyXXX

	mbt_port: port path used by SD or USB interface, the default BT SD/USB port in libbt is /dev/mbtchar0
	               if it's not the same as default port, could set mbt_port in conf file like below
		        mbt_port = /dev/mbtcharX

	baudrate_fw_init: default bardrate when bluetooth fw active after download. The default value is 115200 in libbt. It's not necessary to configure this key in conf unless it need to choose other baudrate.

	baudrate_bt: the baudrate expect to working on when bt running. The default value is 3000000 in libbt. It's not necessary to configure this key in conf unless it need to choose other baudrate. 
	
	bd_address: set bdaddress by configuration file, bdaddress is comprised by 6 bytes. You are expected to input as the format of "bd_address = xx:xx:xx:xx:xx:xx", where 'x' should be hexadecimal digits.

	use_controller_addr: Use controller address if its not default and bd_address is not used.
				Supported values:
				use_controller_addr = 1 (Use controller address, default)
				use_controller_addr = 0 (Dont use controller address)

	pFilename_cal_data: bt calibration file, example: pFilename_cal_data = /vendor/firmware/BtCalData_ext_Boreal_P0_V2.conf
						Note: The Baud rate within calibration file should be same as baudrate_bt(default value is 3000000) in bt_vendor.conf file.

	ble_1m_power: Set signed Bluetooth LE Transmit Power level for 1M PHY, example: ble_1m_power = 10
	ble_2m_power: Set signed Bluetooth LE Transmit Power level for 2M PHY, example: ble_1m_power = -5
				Valid Supported Values:
						Power Class		Minimum Tx Power 	Maximum Tx Power 
							1.5				 -20dbm				 10dbm
							2				 -20dbm				 4 dbm
				Note: Incase the paramter is not set, firmware default values will be used.

	bt_max_power_sel: Update classic BT max transmit power level.
				Supported values:
					bt_max_power_sel = 0 (Use firmware default max power level)
					bt_max_power_sel = 1 (Initial power provided by calibration file will be used as reference for Max Tx power)

				Note: This flag updates the maximum transmit power level.

	pFilename_fw_init_config_bin: Provide path of FW initialization configuration binary.

				Example: pFilename_fw_init_config_bin = /vendor/firmware/88W8987A0_FwConf_0.bin

				Note: Make sure bt_vendor.conf paramter are updated based on feature in pFilename_fw_init_config_bin file.
					  Feature is supported only when BT only firmware download is used.
					  Refer conf/bin for more info.

	independent_reset_mode: Select independent reset modes. 
				Supported values:

					independent_reset_mode = 0 (Disable IR configuration, default)

					independent_reset_mode = 1 (Out Of Band Independent Reset during FW configuration)
						Make sure send_oob_ir_trigger paramter is configured in bt_vendor.conf

					independent_reset_mode = 2 (Inband Independent Reset during FW configuration)

	send_oob_ir_trigger : Configure the Independent Reset(IR) Trigger method.
				Supported values:
				send_oob_ir_trigger = 0 (Disable IR Trigger, default)

				send_oob_ir_trigger = 1 (Use RFKILL to trigger IR)

				send_oob_ir_trigger = 2 (Use GPIO to trigger IR)
					Note: Incase using GPIO trigger make sure independent_reset_gpio_pin, oob_ir_host_gpio_pin, chardev_name are configured in bt_vendor.conf

	independent_reset_gpio_pin: SOC specific GPIO pins selected for triggering out-band reset
				Example: independent_reset_gpio_pin = 15(default value is 255(0xFF))

    oob_ir_host_gpio_pin: Exposed host specific GPIO pin on i.MX platform used to trigger pulse for IR
				Example:ir_host_gpio_pin = 14(For i.MX8 Mini).

    chardev_name: Open the desired GPIO chip by calling gpiod_chip_open API 
				Example:chardev_name="/dev/gpiochip5" by default(For i.MX8 Mini).

	enable_sco_config: Configure sco config.
				Supported values:
				enable_sco_config = 1 (Enable SCO cofig, default)
				enable_sco_config = 0 (Disable SCO config)

	enable_pdn_recovery: Enable PDn recovery mechanism support.
				Supported values:
				enable_pdn_recovery = 0 (Disable, default)
				enable_pdn_recovery = 1 (Enable)

	vhal_trace_level : Select log level for BT VHAL module. Note each level will include messages from previous level as well.
				Supported values:
				vhal_trace_level = 0    No trace messages
				vhal_trace_level = 1    Error condition trace messages
				vhal_trace_level = 2    Warning condition trace messages
				vhal_trace_level = 3    Generic Info messages    
				vhal_trace_level = 4    Debug messages
				vhal_trace_level = 5    Verbose trace message

Below parameters are for fw download, if not use fw download by libbt, don't set any of below in conf file

	enable_download_fw: set to 1 if need to download uart bt fw by libbt when bootup, default value is 0 in libbt, it always download combo fw by wifi side

enable_poke_controller: Support for faster firmware download
                        Supported values:
                        enable_poke_controller = 0 (default)
                        enable_poke_controller = 1 (for IW512, IW611, IW612,AW611HN/AOA,AW611HN/AOB,9098 chipsets)

	pFileName_image: Bt fw path.

		Example: pFileName_image = /vendor/firmware/uart8997_bt_v4.bin

		Note: Setting this value can be skipped for following SOC, respective default values will be used:

				9098 A1 and A2 chip 			: /vendor/firmware/uart9098_bt_v1.bin
				IW512/AW611/IW611/IW612 A0 chip	: /vendor/firmware/uartspi_n61x.bin
				IW512/AW611/IW611/IW612 A1 chip : /vendor/firmware/uartspi_n61x_v1.bin

	pFileName_helper: bt fw helper path, example: pFileName_helper = /vendor/firmware/helper_uart_3000000.bin

	iSecondBaudrate: second baudrate used when download fw. The default value is 0 in libbt, only need to configure it if for 90xx chips.
	example: iSecondBaudrate = 3000000

	enable_heartbeat_config: Used to enable/disable HEARTBEAT Configurations.
				Supported Values:
				enable_heartbeat_config = 0 (disable, Default)
				enable_heartbeat_config = 1 (enable)

	wakeup_power_gpio_pin : GPIO pin selected to generate high/low interrupt to wake up host when receiving the specific advertising packet from RCU Power key
		default value: 13

	wakeup_power_gpio_high_duration : the time interval for making the GPIO pin in high state for receiving the specific advertising packet from RCU Power key, unit is 100ms
		default value: 2

	wakeup_power_gpio_low_duration : the time interval for making the GPIO pin in low state for receiving the specific advertising packet from RCU Power key, unit is 100ms
		default value : 2

	wakeup_netflix_gpio_pin : GPIO pin selected to generate high/low interrupt to wake up host when receiving the specific advertising packet from RCU Netflix key
		default value: 13

	wakeup_netflix_gpio_high_duration : the time interval for making the GPIO pin in low state for receiving the specific advertising packet from RCU Netflix key, unit is 100ms
		default value : 4

	wakeup_netflix_gpio_low_duration : the time interval for making the GPIO pin in low state for receiving the specific advertising packet from RCU Netflix key, unit is 100ms
		default value : 4

	wakeup_adv_pattern : the pattern value to compare with the AD structure value in advertising packet from the air, if all the value matches perfectly, firmware will toggle the GPIO to wake up host, which is in sleep state, based on the configurations, maximum length is 16 bytes
		Configuration rule : the order of value matters, so the configuration value shall be put in the correct sequence
		Example: the pattern value for case 1 will be 0x00, 0x01 ,0x02, 0x03
				 the pattern value for case 2 will be 0x03, 0x02 ,0x01, 0x00
			case 1:
				wakeup_adv_pattern = 0
				wakeup_adv_pattern = 1
				wakeup_adv_pattern = 2
				wakeup_adv_pattern = 3
			case 2:
				wakeup_adv_pattern = 3
				wakeup_adv_pattern = 2
				wakeup_adv_pattern = 1
				wakeup_adv_pattern = 0
		default value : NONE

	wakeup_scan_type : same definition with legacy scan parameter in Core Spec(7.8.10 in v5.3), used to wakeup scan after host entering sleep state
		default value : 0

	wakeup_scan_interval : same definition with legacy scan parameter in Core Spec(section 7.8.10 in v5.3), used to wakeup scan after host entering sleep state
		default value : 128

	wakeup_scan_window : same definition with legacy scan parameter in Core Spec(section 7.8.10 in v5.3), used to wakeup scan after host entering sleep state
		default value : 96

	wakeup_own_addr_type : same definition with legacy scan parameter in Core Spec(section 7.8.10 in v5.3), used to wakeup scan after host entering sleep state
		default value : 0

	wakeup_scan_filter_policy : same definition with legacy scan parameter in Core Spec(section 7.8.10 in v5.3), used to wakeup scan after host entering the sleep state
		default value : 0

	wakeup_local_heartbeat_timer_value : the time interval for HAL to periodically send a specific VSC, called heartbeat command, to firmware, to notify that host is still in the wake state, unit is 100ms
		default value : 8

       Below parameters are not necessary to configure in conf file when download fw by libbt.

	baudrate_dl_helper: baudrate used when download helper. The default value is 115200 in libbt, only need to configure it if choose other baudrate. 

	baudrate_dl_image: baudrate used when start download fw. The default value is 3000000 in libbt, only need to configure it if choose other baudrate.  

	uart_sleep_after_dl: sleep time after bt fw is downloaded, unit in ms. The default value is 100 ms, only need to configure it if need sleep for more time.

	send_boot_sleep_trigger: Used to send trigger from Boot Sleep Patch
		Supported Values:
		send_boot_sleep_trigger = 0 (Default)
		send_boot_sleep_trigger = 1 (Enable sending  Boot Sleep Patch Trigger)