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/* SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause) */
/* Copyright 2019 NXP */
#ifndef _FSL_ENETC_MDIO_H_
#define _FSL_ENETC_MDIO_H_
#include <linux/phy.h>
/* PCS registers */
#define ENETC_PCS_LINK_TIMER1 0x12
#define ENETC_PCS_LINK_TIMER1_VAL 0x06a0
#define ENETC_PCS_LINK_TIMER2 0x13
#define ENETC_PCS_LINK_TIMER2_VAL 0x0003
#define ENETC_PCS_IF_MODE 0x14
#define ENETC_PCS_IF_MODE_SGMII_EN BIT(0)
#define ENETC_PCS_IF_MODE_USE_SGMII_AN BIT(1)
#define ENETC_PCS_IF_MODE_SGMII_SPEED(x) (((x) << 2) & GENMASK(3, 2))
#define ENETC_PCS_IF_MODE_DUPLEX_HALF BIT(3)
/* Not a mistake, the SerDes PLL needs to be set at 3.125 GHz by Reset
* Configuration Word (RCW, outside Linux control) for 2.5G SGMII mode. The PCS
* still thinks it's at gigabit.
*/
enum enetc_pcs_speed {
ENETC_PCS_SPEED_10 = 0,
ENETC_PCS_SPEED_100 = 1,
ENETC_PCS_SPEED_1000 = 2,
ENETC_PCS_SPEED_2500 = 2,
};
struct enetc_hw;
struct enetc_mdio_priv {
struct enetc_hw *hw;
int mdio_base;
};
#if IS_REACHABLE(CONFIG_FSL_ENETC_MDIO)
int enetc_mdio_read(struct mii_bus *bus, int phy_id, int regnum);
int enetc_mdio_write(struct mii_bus *bus, int phy_id, int regnum, u16 value);
struct enetc_hw *enetc_hw_alloc(struct device *dev, void __iomem *port_regs);
#else
static inline int enetc_mdio_read(struct mii_bus *bus, int phy_id, int regnum)
{ return -EINVAL; }
static inline int enetc_mdio_write(struct mii_bus *bus, int phy_id, int regnum,
u16 value)
{ return -EINVAL; }
static inline struct enetc_hw *enetc_hw_alloc(struct device *dev,
void __iomem *port_regs)
{ return ERR_PTR(-EINVAL); }
#endif
#endif