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