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>
The self ID sequence delivers the information about the state of port.
This commit adds some enumerations to express the state of port, and
some helper functions to handle the state. It adds a KUnit test for them,
too.
Link: https://lore.kernel.org/r/20240605235155.116468-3-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>
