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. You can use tools such as Thunderbolt/USB4 26 debugging tools to access these registers. For more 27 information see: 28 29 https://github.com/intel/tbtools 30 31 Only enable this if you know what you are doing! Never enable 32 this for production systems or distro kernels. 33 34config USB4_DEBUGFS_MARGINING 35 bool "Expose receiver lane margining operations under USB4 ports and retimers (DANGEROUS)" 36 depends on DEBUG_FS 37 depends on USB4_DEBUGFS_WRITE 38 help 39 Enables hardware and software based receiver lane margining 40 support under each USB4 port and retimer, including retimers 41 on the other side of the cable. Used for electrical quality 42 and robustness validation during manufacturing. Should not be 43 enabled by distro kernels. 44 45config USB4_KUNIT_TEST 46 bool "KUnit tests" if !KUNIT_ALL_TESTS 47 depends on USB4 && KUNIT=y 48 default KUNIT_ALL_TESTS 49 50config USB4_DMA_TEST 51 tristate "DMA traffic test driver" 52 depends on DEBUG_FS 53 help 54 This allows sending and receiving DMA traffic through loopback 55 connection. Loopback connection can be done by either special 56 dongle that has TX/RX lines crossed, or by simply connecting a 57 cable back to the host. Only enable this if you know what you 58 are doing. Normal users and distro kernels should say N here. 59 60 To compile this driver a module, choose M here. The module will be 61 called thunderbolt_dma_test. 62 63endif # USB4 64