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scancount=1 engine=8.21.0-2504070000 definitions=main-2505120013 Hi, This patchset brings initial support for Silicon Labs CPC protocol, standing for Co-Processor Communication. This protocol is used by the EFR32 Series [1]. These devices offer a variety for radio protocols, such as Bluetooth, Z-Wave, Zigbee [2]. Some of the devices support several protocols in one chipset, and the main raison d'etre for CPC is to facilicate the co-existence of these protocols by providing each radio stack a dedicated communication channel over a shared physical link, such as SPI or SDIO. These separate communication channels are called endpoints and the protocol provides: - reliability by retransmitting unacknowledged packets. This is not part of the current patchset - ordered delivery - resource management, by avoiding sending packets to the radio co-processor if it doesn't have the room for receiving them The current patchset showcases a full example with Bluetooth over SPI. In the future, other buses should be supported, as well as other radio protocols. For the RFC, I've bundled everything together in a big module to avoid submitting patches to different subsystems, but I expect to get comments about that and the final version of these series will probably be split into two or three modules. Please let me know if it makes sense or not: - net/cpc for the core implementation of the protocol - drivers/bluetooth/ for the bluetooth endpoint - optionally, the SPI driver could be separated from the main module and moved to drivers/spi I've tried to split the patchset in digestible atomic commits but as we're introducing a new protocol the first 12 commits are all needed to get it to work. The SPI and Bluetooth driver are more standalone and illustrates how new bus or radio protocols would be added in the future. [1] https://www.silabs.com/wireless/gecko-series-2 [2] https://www.silabs.com/wireless Damien Riégel (15): net: cpc: add base skeleton driver net: cpc: add endpoint infrastructure net: cpc: introduce CPC driver and bus net: cpc: add protocol header structure and API net: cpc: implement basic transmit path net: cpc: implement basic receive path net: cpc: implement sequencing and ack net: cpc: add support for connecting endpoints net: cpc: add support for RST frames net: cpc: make disconnect blocking net: cpc: add system endpoint net: cpc: create system endpoint with a new interface dt-bindings: net: cpc: add silabs,cpc-spi.yaml net: cpc: add SPI interface driver net: cpc: add Bluetooth HCI driver .../bindings/net/silabs,cpc-spi.yaml | 54 ++ MAINTAINERS | 6 + drivers/net/Kconfig | 2 + drivers/net/Makefile | 1 + drivers/net/cpc/Kconfig | 16 + drivers/net/cpc/Makefile | 5 + drivers/net/cpc/ble.c | 147 +++++ drivers/net/cpc/ble.h | 14 + drivers/net/cpc/cpc.h | 204 +++++++ drivers/net/cpc/endpoint.c | 333 +++++++++++ drivers/net/cpc/header.c | 237 ++++++++ drivers/net/cpc/header.h | 83 +++ drivers/net/cpc/interface.c | 308 ++++++++++ drivers/net/cpc/interface.h | 117 ++++ drivers/net/cpc/main.c | 163 ++++++ drivers/net/cpc/protocol.c | 309 ++++++++++ drivers/net/cpc/protocol.h | 27 + drivers/net/cpc/spi.c | 550 ++++++++++++++++++ drivers/net/cpc/spi.h | 12 + drivers/net/cpc/system.c | 432 ++++++++++++++ drivers/net/cpc/system.h | 14 + 21 files changed, 3034 insertions(+) create mode 100644 Documentation/devicetree/bindings/net/silabs,cpc-spi.yaml create mode 100644 drivers/net/cpc/Kconfig create mode 100644 drivers/net/cpc/Makefile create mode 100644 drivers/net/cpc/ble.c create mode 100644 drivers/net/cpc/ble.h create mode 100644 drivers/net/cpc/cpc.h create mode 100644 drivers/net/cpc/endpoint.c create mode 100644 drivers/net/cpc/header.c create mode 100644 drivers/net/cpc/header.h create mode 100644 drivers/net/cpc/interface.c create mode 100644 drivers/net/cpc/interface.h create mode 100644 drivers/net/cpc/main.c create mode 100644 drivers/net/cpc/protocol.c create mode 100644 drivers/net/cpc/protocol.h create mode 100644 drivers/net/cpc/spi.c create mode 100644 drivers/net/cpc/spi.h create mode 100644 drivers/net/cpc/system.c create mode 100644 drivers/net/cpc/system.h -- 2.49.0