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net: ti: icssm-prueth: Adds ICSSM Ethernet driver

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Updates Kernel configuration to enable PRUETH driver and its dependencies
along with makefile changes to add the new PRUETH driver.

Changes includes init and deinit of ICSSM PRU Ethernet driver including
net dev registration and firmware loading for DUAL-MAC mode running on
PRU-ICSS2 instance.

Changes also includes link handling, PRU booting, default firmware loading
and PRU stopping using existing remoteproc driver APIs.

Reviewed-by: Mohan Reddy Putluru <pmohan@couthit.com>
Signed-off-by: Roger Quadros <rogerq@ti.com>
Signed-off-by: Andrew F. Davis <afd@ti.com>
Signed-off-by: Basharath Hussain Khaja <basharath@couthit.com>
Signed-off-by: Parvathi Pudi <parvathi@couthit.com>
Link: https://patch.msgid.link/20250912104741.528721-3-parvathi@couthit.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Roger Quadros
2025-09-14 13:00:54 -07:00
committed by Jakub Kicinski
parent eb391228ae
commit 511f6c1ae0
4 changed files with 727 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files
drivers/net/ethernet/ti/Kconfig
+12
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@@ -229,4 +229,16 @@ config TI_ICSS_IEP
To compile this driver as a module, choose M here. The module
will be called icss_iep.
config TI_PRUETH
tristate "TI PRU Ethernet EMAC driver"
depends on PRU_REMOTEPROC
depends on NET_SWITCHDEV
select TI_ICSS_IEP
imply PTP_1588_CLOCK
help
Some TI SoCs has Programmable Realtime Unit (PRU) cores which can
support Single or Dual Ethernet ports with the help of firmware code
running on PRU cores. This driver supports remoteproc based
communication to PRU firmware to expose Ethernet interface to Linux.
endif # NET_VENDOR_TI
drivers/net/ethernet/ti/Makefile
+3
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@@ -3,6 +3,9 @@
# Makefile for the TI network device drivers.
#
obj-$(CONFIG_TI_PRUETH) += icssm-prueth.o
icssm-prueth-y := icssm/icssm_prueth.o
obj-$(CONFIG_TI_CPSW) += cpsw-common.o
obj-$(CONFIG_TI_DAVINCI_EMAC) += cpsw-common.o
obj-$(CONFIG_TI_CPSW_SWITCHDEV) += cpsw-common.o
drivers/net/ethernet/ti/icssm/icssm_prueth.c
+612
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File diff suppressed because it is too large Load Diff
drivers/net/ethernet/ti/icssm/icssm_prueth.h
+100
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@@ -0,0 +1,100 @@
/* SPDX-License-Identifier: GPL-2.0 */
/* Texas Instruments ICSSM Ethernet driver
*
* Copyright (C) 2018-2022 Texas Instruments Incorporated - https://www.ti.com/
*
*/
#ifndef __NET_TI_PRUETH_H
#define __NET_TI_PRUETH_H
#include <linux/phy.h>
#include <linux/types.h>
#include <linux/pruss_driver.h>
#include <linux/remoteproc/pruss.h>
/* PRU Ethernet Type - Ethernet functionality (protocol
* implemented) provided by the PRU firmware being loaded.
*/
enum pruss_ethtype {
PRUSS_ETHTYPE_EMAC = 0,
PRUSS_ETHTYPE_HSR,
PRUSS_ETHTYPE_PRP,
PRUSS_ETHTYPE_SWITCH,
PRUSS_ETHTYPE_MAX,
};
/* In switch mode there are 3 real ports i.e. 3 mac addrs.
* however Linux sees only the host side port. The other 2 ports
* are the switch ports.
* In emac mode there are 2 real ports i.e. 2 mac addrs.
* Linux sees both the ports.
*/
enum prueth_port {
PRUETH_PORT_HOST = 0, /* host side port */
PRUETH_PORT_MII0, /* physical port MII 0 */
PRUETH_PORT_MII1, /* physical port MII 1 */
PRUETH_PORT_INVALID, /* Invalid prueth port */
};
enum prueth_mac {
PRUETH_MAC0 = 0,
PRUETH_MAC1,
PRUETH_NUM_MACS,
PRUETH_MAC_INVALID,
};
/**
* struct prueth_firmware - PRU Ethernet FW data
* @fw_name: firmware names of firmware to run on PRU
*/
struct prueth_firmware {
const char *fw_name[PRUSS_ETHTYPE_MAX];
};
/**
* struct prueth_private_data - PRU Ethernet private data
* @fw_pru: firmware names to be used for PRUSS ethernet usecases
*/
struct prueth_private_data {
const struct prueth_firmware fw_pru[PRUSS_NUM_PRUS];
};
/* data for each emac port */
struct prueth_emac {
struct prueth *prueth;
struct net_device *ndev;
struct rproc *pru;
struct phy_device *phydev;
int link;
int speed;
int duplex;
enum prueth_port port_id;
const char *phy_id;
u8 mac_addr[6];
phy_interface_t phy_if;
/* spin lock used to protect
* during link configuration
*/
spinlock_t lock;
};
struct prueth {
struct device *dev;
struct pruss *pruss;
struct rproc *pru0, *pru1;
const struct prueth_private_data *fw_data;
struct prueth_fw_offsets *fw_offsets;
struct device_node *eth_node[PRUETH_NUM_MACS];
struct prueth_emac *emac[PRUETH_NUM_MACS];
struct net_device *registered_netdevs[PRUETH_NUM_MACS];
unsigned int eth_type;
};
#endif /* __NET_TI_PRUETH_H */