Synopsys DesignWare XPCS is an MMD that can manage link status, auto-negotiation, link training, ... In this commit we add basic support for XPCS using USXGMII interface and Clause 73 Auto-negotiation. This is highly tied with PHYLINK and can't be used without it. A given ethernet driver can use the provided callbacks to add the support for XPCS.
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| 1 | +/* SPDX-License-Identifier: GPL-2.0 */ | |
| 2 | +/* | |
| 3 | + * Copyright (c) 2020 Synopsys, Inc. and/or its affiliates. | |
| 4 | + * Synopsys DesignWare XPCS helpers | |
| 5 | + */ | |
| 6 | + | |
| 7 | +#ifndef __LINUX_MDIO_XPCS_H | |
| 8 | +#define __LINUX_MDIO_XPCS_H | |
| 9 | + | |
| 10 | +#include <linux/phy.h> | |
| 11 | +#include <linux/phylink.h> | |
| 12 | + | |
| 13 | +struct mdio_xpcs_args { | |
| 14 | + __ETHTOOL_DECLARE_LINK_MODE_MASK(supported); | |
| 15 | + struct mii_bus *bus; | |
| 16 | + int addr; | |
| 17 | +}; | |
| 18 | + | |
| 19 | +struct mdio_xpcs_ops { | |
| 20 | + int (*validate)(struct mdio_xpcs_args *xpcs, | |
| 21 | + unsigned long *supported, | |
| 22 | + struct phylink_link_state *state); | |
| 23 | + int (*config)(struct mdio_xpcs_args *xpcs, | |
| 24 | + const struct phylink_link_state *state); | |
| 25 | + int (*get_state)(struct mdio_xpcs_args *xpcs, | |
| 26 | + struct phylink_link_state *state); | |
| 27 | + int (*link_up)(struct mdio_xpcs_args *xpcs, int speed, | |
| 28 | + phy_interface_t interface); | |
| 29 | + int (*probe)(struct mdio_xpcs_args *xpcs, phy_interface_t interface); | |
| 30 | +}; | |
| 31 | + | |
| 32 | +#if IS_ENABLED(CONFIG_MDIO_XPCS) | |
| 33 | +struct mdio_xpcs_ops *mdio_xpcs_get_ops(void); | |
| 34 | +#else | |
| 35 | +static inline struct mdio_xpcs_ops *mdio_xpcs_get_ops(void) | |
| 36 | +{ | |
| 37 | + return NULL; | |
| 38 | +} | |
| 39 | +#endif | |
| 40 | + | |
| 41 | +#endif /* __LINUX_MDIO_XPCS_H */ | |