The CPSW Proxy Client driver in Linux communicates with Ethernet Switch Firmware (EthFw) running on a remote core via RPMsg. EthFw announces its RPMsg Endpoint over the RPMsg-Bus notifying its presence to all Clients. Register the CPSW Proxy Client driver with the RPMsg framework. Signed-off-by: Siddharth Vadapalli <s-vadapalli@xxxxxx> --- drivers/net/ethernet/ti/Kconfig | 14 +++++ drivers/net/ethernet/ti/Makefile | 3 + drivers/net/ethernet/ti/cpsw-proxy-client.c | 70 +++++++++++++++++++++ 3 files changed, 87 insertions(+) create mode 100644 drivers/net/ethernet/ti/cpsw-proxy-client.c diff --git a/drivers/net/ethernet/ti/Kconfig b/drivers/net/ethernet/ti/Kconfig index 1729eb0e0b41..ffbfd625625d 100644 --- a/drivers/net/ethernet/ti/Kconfig +++ b/drivers/net/ethernet/ti/Kconfig @@ -79,6 +79,20 @@ config TI_CPSW_SWITCHDEV To compile this driver as a module, choose M here: the module will be called cpsw_new. +config TI_CPSW_PROXY_CLIENT + tristate "TI CPSW Proxy Client" + depends on ARCH_K3 && OF && TI_K3_UDMA_GLUE_LAYER + help + This driver supports Ethernet functionality for CPSWnG + Ethernet Subsystem which is configured by Ethernet Switch + Firmware (EthFw). + + The Ethernet Switch Firmware acts as a proxy to the Linux + Client driver by performing all the necessary configuration + of the CPSW Peripheral while enabling network data transfer + to/from the Linux Client to CPSW over the allocated TX DMA + Channels and RX DMA Flows. + config TI_CPTS tristate "TI Common Platform Time Sync (CPTS) Support" depends on ARCH_OMAP2PLUS || ARCH_KEYSTONE || COMPILE_TEST diff --git a/drivers/net/ethernet/ti/Makefile b/drivers/net/ethernet/ti/Makefile index 6e086b4c0384..229b828f099e 100644 --- a/drivers/net/ethernet/ti/Makefile +++ b/drivers/net/ethernet/ti/Makefile @@ -7,6 +7,9 @@ obj-$(CONFIG_TI_CPSW) += cpsw-common.o obj-$(CONFIG_TI_DAVINCI_EMAC) += cpsw-common.o obj-$(CONFIG_TI_CPSW_SWITCHDEV) += cpsw-common.o +obj-$(CONFIG_TI_CPSW_PROXY_CLIENT) += ti-cpsw-proxy-client.o +ti-cpsw-proxy-client-y := cpsw-proxy-client.o + obj-$(CONFIG_TLAN) += tlan.o obj-$(CONFIG_TI_DAVINCI_EMAC) += ti_davinci_emac.o ti_davinci_emac-y := davinci_emac.o davinci_cpdma.o diff --git a/drivers/net/ethernet/ti/cpsw-proxy-client.c b/drivers/net/ethernet/ti/cpsw-proxy-client.c new file mode 100644 index 000000000000..91d3338b3788 --- /dev/null +++ b/drivers/net/ethernet/ti/cpsw-proxy-client.c @@ -0,0 +1,70 @@ +// SPDX-License-Identifier: GPL-2.0-only or MIT +/* Texas Instruments CPSW Proxy Client Driver + * + * Copyright (C) 2024 Texas Instruments Incorporated - https://www.ti.com/ + * + */ + +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/rpmsg.h> + +#include "ethfw_abi.h" + +struct cpsw_proxy_priv { + struct rpmsg_device *rpdev; + struct device *dev; +}; + +static int cpsw_proxy_client_cb(struct rpmsg_device *rpdev, void *data, + int len, void *priv, u32 src) +{ + struct device *dev = &rpdev->dev; + + dev_dbg(dev, "callback invoked\n"); + + return 0; +} + +static int cpsw_proxy_client_probe(struct rpmsg_device *rpdev) +{ + struct cpsw_proxy_priv *proxy_priv; + + proxy_priv = devm_kzalloc(&rpdev->dev, sizeof(struct cpsw_proxy_priv), GFP_KERNEL); + if (!proxy_priv) + return -ENOMEM; + + proxy_priv->rpdev = rpdev; + proxy_priv->dev = &rpdev->dev; + dev_dbg(proxy_priv->dev, "driver probed\n"); + + return 0; +} + +static void cpsw_proxy_client_remove(struct rpmsg_device *rpdev) +{ + struct device *dev = &rpdev->dev; + + dev_dbg(dev, "driver removed\n"); +} + +static struct rpmsg_device_id cpsw_proxy_client_id_table[] = { + { + .name = ETHFW_SERVICE_EP_NAME, + }, + {}, +}; +MODULE_DEVICE_TABLE(rpmsg, cpsw_proxy_client_id_table); + +static struct rpmsg_driver cpsw_proxy_client_driver = { + .drv.name = KBUILD_MODNAME, + .id_table = cpsw_proxy_client_id_table, + .probe = cpsw_proxy_client_probe, + .callback = cpsw_proxy_client_cb, + .remove = cpsw_proxy_client_remove, +}; +module_rpmsg_driver(cpsw_proxy_client_driver); + +MODULE_LICENSE("GPL"); +MODULE_DESCRIPTION("CPSW Proxy Client Driver"); +MODULE_AUTHOR("Siddharth Vadapalli <s-vadapalli@xxxxxx>"); -- 2.40.1
