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# SPDX-License-Identifier: GPL-2.0-only
#
# Bluetooth subsystem configuration
#
menuconfig BT
tristate "Bluetooth subsystem support"
depends on !S390
depends on RFKILL || !RFKILL
select CRC16
select CRYPTO
select CRYPTO_SKCIPHER
select CRYPTO_LIB_AES
imply CRYPTO_AES
select CRYPTO_CMAC
select CRYPTO_ECB
select CRYPTO_SHA256
select CRYPTO_ECDH
help
Bluetooth is low-cost, low-power, short-range wireless technology.
It was designed as a replacement for cables and other short-range
technologies like IrDA. Bluetooth operates in personal area range
that typically extends up to 10 meters. More information about
Bluetooth can be found at <https://www.bluetooth.com/>.
Linux Bluetooth subsystem consist of several layers:
Bluetooth Core
HCI device and connection manager, scheduler
SCO audio links
L2CAP (Logical Link Control and Adaptation Protocol)
SMP (Security Manager Protocol) on LE (Low Energy) links
ISO isochronous links
HCI Device drivers (Interface to the hardware)
RFCOMM Module (RFCOMM Protocol)
BNEP Module (Bluetooth Network Encapsulation Protocol)
CMTP Module (CAPI Message Transport Protocol)
HIDP Module (Human Interface Device Protocol)
Say Y here to compile Bluetooth support into the kernel or say M to
compile it as module (bluetooth).
To use Linux Bluetooth subsystem, you will need several user-space
utilities like hciconfig and bluetoothd. These utilities and updates
to Bluetooth kernel modules are provided in the BlueZ packages. For
more information, see <http://www.bluez.org/>.
config BT_BREDR
bool "Bluetooth Classic (BR/EDR) features"
depends on BT
default y
help
Bluetooth Classic includes support for Basic Rate (BR)
available with Bluetooth version 1.0b or later and support
for Enhanced Data Rate (EDR) available with Bluetooth
version 2.0 or later.
source "net/bluetooth/rfcomm/Kconfig"
source "net/bluetooth/bnep/Kconfig"
source "net/bluetooth/cmtp/Kconfig"
source "net/bluetooth/hidp/Kconfig"
config BT_LE
bool "Bluetooth Low Energy (LE) features"
depends on BT
default y
help
Bluetooth Low Energy includes support low-energy physical
layer available with Bluetooth version 4.0 or later.
config BT_LE_L2CAP_ECRED
bool "Bluetooth L2CAP Enhanced Credit Flow Control"
depends on BT_LE
default y
help
Bluetooth Low Energy L2CAP Enhanced Credit Flow Control available with
Bluetooth version 5.2 or later.
This can be overridden by passing bluetooth.enable_ecred=[1|0]
on the kernel commandline.
config BT_6LOWPAN
tristate "Bluetooth 6LoWPAN support"
depends on BT_LE && 6LOWPAN
help
IPv6 compression over Bluetooth Low Energy.
config BT_LEDS
bool "Enable LED triggers"
depends on BT
depends on LEDS_CLASS
select LEDS_TRIGGERS
help
This option selects a few LED triggers for different
Bluetooth events.
config BT_MSFTEXT
bool "Enable Microsoft extensions"
depends on BT
help
This options enables support for the Microsoft defined HCI
vendor extensions.
config BT_AOSPEXT
bool "Enable Android Open Source Project extensions"
depends on BT
help
This options enables support for the Android Open Source
Project defined HCI vendor extensions.
config BT_DEBUGFS
bool "Export Bluetooth internals in debugfs"
depends on BT && DEBUG_FS
default y
help
Provide extensive information about internal Bluetooth states
in debugfs.
config BT_SELFTEST
bool "Bluetooth self testing support"
depends on BT && DEBUG_KERNEL
help
Run self tests when initializing the Bluetooth subsystem. This
is a developer option and can cause significant delay when booting
the system.
When the Bluetooth subsystem is built as module, then the test
cases are run first thing at module load time. When the Bluetooth
subsystem is compiled into the kernel image, then the test cases
are run late in the initcall hierarchy.
config BT_SELFTEST_ECDH
bool "ECDH test cases"
depends on BT_LE && BT_SELFTEST
help
Run test cases for ECDH cryptographic functionality used by the
Bluetooth Low Energy Secure Connections feature.
config BT_SELFTEST_SMP
bool "SMP test cases"
depends on BT_LE && BT_SELFTEST
help
Run test cases for SMP cryptographic functionality, including both
legacy SMP as well as the Secure Connections features.
config BT_FEATURE_DEBUG
bool "Enable runtime option for debugging statements"
depends on BT && !DYNAMIC_DEBUG
help
This provides an option to enable/disable debugging statements
at runtime via the experimental features interface.
source "drivers/bluetooth/Kconfig"
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