1# SPDX-License-Identifier: GPL-2.0-only 2menuconfig USB4 3 tristate "Unified support for USB4 and Thunderbolt" 4 depends on PCI 5 select APPLE_PROPERTIES if EFI_STUB && X86 6 select CRC32 7 select CRYPTO 8 select CRYPTO_HASH 9 select NVMEM 10 help 11 USB4 and Thunderbolt driver. USB4 is the public specification 12 based on the Thunderbolt 3 protocol. This driver is required if 13 you want to hotplug Thunderbolt and USB4 compliant devices on 14 Apple hardware or on PCs with Intel Falcon Ridge or newer. 15 16 To compile this driver a module, choose M here. The module will be 17 called thunderbolt. 18 19if USB4 20 21config USB4_DEBUGFS_WRITE 22 bool "Enable write by debugfs to configuration spaces (DANGEROUS)" 23 help 24 Enables writing to device configuration registers through 25 debugfs interface. 26 27 Only enable this if you know what you are doing! Never enable 28 this for production systems or distro kernels. 29 30config USB4_DEBUGFS_MARGINING 31 bool "Expose receiver lane margining operations under USB4 ports (DANGEROUS)" 32 depends on DEBUG_FS 33 depends on USB4_DEBUGFS_WRITE 34 help 35 Enables hardware and software based receiver lane margining support 36 under each USB4 port. Used for electrical quality and robustness 37 validation during manufacturing. Should not be enabled by distro 38 kernels. 39 40config USB4_KUNIT_TEST 41 bool "KUnit tests" if !KUNIT_ALL_TESTS 42 depends on USB4 && KUNIT=y 43 default KUNIT_ALL_TESTS 44 45config USB4_DMA_TEST 46 tristate "DMA traffic test driver" 47 depends on DEBUG_FS 48 help 49 This allows sending and receiving DMA traffic through loopback 50 connection. Loopback connection can be done by either special 51 dongle that has TX/RX lines crossed, or by simply connecting a 52 cable back to the host. Only enable this if you know what you 53 are doing. Normal users and distro kernels should say N here. 54 55 To compile this driver a module, choose M here. The module will be 56 called thunderbolt_dma_test. 57 58endif # USB4 59