In the protocol of IEEE 1394, phy configuration packet is broadcasted to
the bus to configure all PHYs residing on the bus. It includes two
purposes; selecting root node and optimizing gap count.
This commit adds some helper function to serialize/deserialize the
content of phy configuration packet, as well as some KUnit tests for it.
Link: https://lore.kernel.org/r/20240606235133.231543-2-o-takashi@sakamocchi.jp
Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Within FireWire subsystem, the serializations and deserializations of phy
packet are implemented in several parts. They includes some redundancies.
This commit adds a series of helper functions for the serializations and
deserializations of self ID packet with a Kunit test suite.
Link: https://lore.kernel.org/r/20240605235155.116468-8-o-takashi@sakamocchi.jp
Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
When the state of bus reset finishes, 1394 OHCI driver constructs self ID
sequences, then it calls fw_core_handle_bus_reset() in core function. The
core function enumerates the self ID sequences to build bus topology.
This commit adds a structure and some helper functions for the enumeration,
and adds a KUnit test suite to ensure its expected behaviour.
Link: https://lore.kernel.org/r/20240605235155.116468-2-o-takashi@sakamocchi.jp
Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
