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- # SPDX-License-Identifier: GPL-2.0-only
- menuconfig USB4
- tristate "Unified support for USB4 and Thunderbolt"
- depends on PCI
- select APPLE_PROPERTIES if EFI_STUB && X86
- select CRC32
- select CRYPTO
- select CRYPTO_HASH
- select NVMEM
- help
- USB4 and Thunderbolt driver. USB4 is the public specification
- based on the Thunderbolt 3 protocol. This driver is required if
- you want to hotplug Thunderbolt and USB4 compliant devices on
- Apple hardware or on PCs with Intel Falcon Ridge or newer.
- To compile this driver a module, choose M here. The module will be
- called thunderbolt.
- if USB4
- config USB4_DEBUGFS_WRITE
- bool "Enable write by debugfs to configuration spaces (DANGEROUS)"
- help
- Enables writing to device configuration registers through
- debugfs interface. You can use tools such as Thunderbolt/USB4
- debugging tools to access these registers. For more
- information see:
- https://github.com/intel/tbtools
- Only enable this if you know what you are doing! Never enable
- this for production systems or distro kernels.
- config USB4_DEBUGFS_MARGINING
- bool "Expose receiver lane margining operations under USB4 ports and retimers (DANGEROUS)"
- depends on DEBUG_FS
- depends on USB4_DEBUGFS_WRITE
- help
- Enables hardware and software based receiver lane margining
- support under each USB4 port and retimer, including retimers
- on the other side of the cable. Used for electrical quality
- and robustness validation during manufacturing. Should not be
- enabled by distro kernels.
- config USB4_KUNIT_TEST
- bool "KUnit tests" if !KUNIT_ALL_TESTS
- depends on USB4 && KUNIT=y
- default KUNIT_ALL_TESTS
- config USB4_DMA_TEST
- tristate "DMA traffic test driver"
- depends on DEBUG_FS
- help
- This allows sending and receiving DMA traffic through loopback
- connection. Loopback connection can be done by either special
- dongle that has TX/RX lines crossed, or by simply connecting a
- cable back to the host. Only enable this if you know what you
- are doing. Normal users and distro kernels should say N here.
- To compile this driver a module, choose M here. The module will be
- called thunderbolt_dma_test.
- endif # USB4
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