1# SPDX-License-Identifier: GPL-2.0-only 2# 3# Bluetooth subsystem configuration 4# 5 6menuconfig BT 7 tristate "Bluetooth subsystem support" 8 depends on !S390 9 depends on RFKILL || !RFKILL 10 select CRC16 11 select CRYPTO 12 select CRYPTO_SKCIPHER 13 select CRYPTO_LIB_AES 14 imply CRYPTO_AES 15 select CRYPTO_CMAC 16 select CRYPTO_ECB 17 select CRYPTO_SHA256 18 select CRYPTO_ECDH 19 help 20 Bluetooth is low-cost, low-power, short-range wireless technology. 21 It was designed as a replacement for cables and other short-range 22 technologies like IrDA. Bluetooth operates in personal area range 23 that typically extends up to 10 meters. More information about 24 Bluetooth can be found at <https://www.bluetooth.com/>. 25 26 Linux Bluetooth subsystem consist of several layers: 27 Bluetooth Core 28 HCI device and connection manager, scheduler 29 SCO audio links 30 L2CAP (Logical Link Control and Adaptation Protocol) 31 SMP (Security Manager Protocol) on LE (Low Energy) links 32 ISO isochronous links 33 HCI Device drivers (Interface to the hardware) 34 RFCOMM Module (RFCOMM Protocol) 35 BNEP Module (Bluetooth Network Encapsulation Protocol) 36 HIDP Module (Human Interface Device Protocol) 37 38 Say Y here to compile Bluetooth support into the kernel or say M to 39 compile it as module (bluetooth). 40 41 To use Linux Bluetooth subsystem, you will need several user-space 42 utilities like hciconfig and bluetoothd. These utilities and updates 43 to Bluetooth kernel modules are provided in the BlueZ packages. For 44 more information, see <http://www.bluez.org/>. 45 46config BT_BREDR 47 bool "Bluetooth Classic (BR/EDR) features" 48 depends on BT 49 default y 50 help 51 Bluetooth Classic includes support for Basic Rate (BR) 52 available with Bluetooth version 1.0b or later and support 53 for Enhanced Data Rate (EDR) available with Bluetooth 54 version 2.0 or later. 55 56source "net/bluetooth/rfcomm/Kconfig" 57 58source "net/bluetooth/bnep/Kconfig" 59 60source "net/bluetooth/hidp/Kconfig" 61 62config BT_LE 63 bool "Bluetooth Low Energy (LE) features" 64 depends on BT 65 default y 66 help 67 Bluetooth Low Energy includes support low-energy physical 68 layer available with Bluetooth version 4.0 or later. 69 70config BT_LE_L2CAP_ECRED 71 bool "Bluetooth L2CAP Enhanced Credit Flow Control" 72 depends on BT_LE 73 default y 74 help 75 Bluetooth Low Energy L2CAP Enhanced Credit Flow Control available with 76 Bluetooth version 5.2 or later. 77 78 This can be overridden by passing bluetooth.enable_ecred=[1|0] 79 on the kernel commandline. 80 81config BT_6LOWPAN 82 tristate "Bluetooth 6LoWPAN support" 83 depends on BT_LE && 6LOWPAN 84 help 85 IPv6 compression over Bluetooth Low Energy. 86 87config BT_LEDS 88 bool "Enable LED triggers" 89 depends on BT 90 depends on LEDS_CLASS 91 select LEDS_TRIGGERS 92 help 93 This option selects a few LED triggers for different 94 Bluetooth events. 95 96config BT_MSFTEXT 97 bool "Enable Microsoft extensions" 98 depends on BT 99 help 100 This options enables support for the Microsoft defined HCI 101 vendor extensions. 102 103config BT_AOSPEXT 104 bool "Enable Android Open Source Project extensions" 105 depends on BT 106 help 107 This options enables support for the Android Open Source 108 Project defined HCI vendor extensions. 109 110config BT_DEBUGFS 111 bool "Export Bluetooth internals in debugfs" 112 depends on BT && DEBUG_FS 113 default y 114 help 115 Provide extensive information about internal Bluetooth states 116 in debugfs. 117 118config BT_SELFTEST 119 bool "Bluetooth self testing support" 120 depends on BT && DEBUG_KERNEL 121 help 122 Run self tests when initializing the Bluetooth subsystem. This 123 is a developer option and can cause significant delay when booting 124 the system. 125 126 When the Bluetooth subsystem is built as module, then the test 127 cases are run first thing at module load time. When the Bluetooth 128 subsystem is compiled into the kernel image, then the test cases 129 are run late in the initcall hierarchy. 130 131config BT_SELFTEST_ECDH 132 bool "ECDH test cases" 133 depends on BT_LE && BT_SELFTEST 134 help 135 Run test cases for ECDH cryptographic functionality used by the 136 Bluetooth Low Energy Secure Connections feature. 137 138config BT_SELFTEST_SMP 139 bool "SMP test cases" 140 depends on BT_LE && BT_SELFTEST 141 help 142 Run test cases for SMP cryptographic functionality, including both 143 legacy SMP as well as the Secure Connections features. 144 145config BT_FEATURE_DEBUG 146 bool "Enable runtime option for debugging statements" 147 depends on BT && !DYNAMIC_DEBUG 148 help 149 This provides an option to enable/disable debugging statements 150 at runtime via the experimental features interface. 151 152source "drivers/bluetooth/Kconfig" 153