enetc_mdio.h

 1/* SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause) */
 2/* Copyright 2019 NXP */
 3
 4#ifndef _FSL_ENETC_MDIO_H_
 5#define _FSL_ENETC_MDIO_H_
 6
 7#include <linux/phy.h>
 8
 9/* PCS registers */
10#define ENETC_PCS_LINK_TIMER1			0x12
11#define ENETC_PCS_LINK_TIMER1_VAL		0x06a0
12#define ENETC_PCS_LINK_TIMER2			0x13
13#define ENETC_PCS_LINK_TIMER2_VAL		0x0003
14#define ENETC_PCS_IF_MODE			0x14
15#define ENETC_PCS_IF_MODE_SGMII_EN		BIT(0)
16#define ENETC_PCS_IF_MODE_USE_SGMII_AN		BIT(1)
17#define ENETC_PCS_IF_MODE_SGMII_SPEED(x)	(((x) << 2) & GENMASK(3, 2))
18#define ENETC_PCS_IF_MODE_DUPLEX_HALF		BIT(3)
19
20/* Not a mistake, the SerDes PLL needs to be set at 3.125 GHz by Reset
21 * Configuration Word (RCW, outside Linux control) for 2.5G SGMII mode. The PCS
22 * still thinks it's at gigabit.
23 */
24enum enetc_pcs_speed {
25	ENETC_PCS_SPEED_10	= 0,
26	ENETC_PCS_SPEED_100	= 1,
27	ENETC_PCS_SPEED_1000	= 2,
28	ENETC_PCS_SPEED_2500	= 2,
29};
30
31struct enetc_hw;
32
33struct enetc_mdio_priv {
34	struct enetc_hw *hw;
35	int mdio_base;
36};
37
38#if IS_REACHABLE(CONFIG_FSL_ENETC_MDIO)
39
40int enetc_mdio_read_c22(struct mii_bus *bus, int phy_id, int regnum);
41int enetc_mdio_write_c22(struct mii_bus *bus, int phy_id, int regnum,
42			 u16 value);
43int enetc_mdio_read_c45(struct mii_bus *bus, int phy_id, int devad, int regnum);
44int enetc_mdio_write_c45(struct mii_bus *bus, int phy_id, int devad, int regnum,
45			 u16 value);
46struct enetc_hw *enetc_hw_alloc(struct device *dev, void __iomem *port_regs);
47
48#else
49
50static inline int enetc_mdio_read_c22(struct mii_bus *bus, int phy_id,
51				      int regnum)
52{ return -EINVAL; }
53static inline int enetc_mdio_write_c22(struct mii_bus *bus, int phy_id,
54				       int regnum, u16 value)
55{ return -EINVAL; }
56static inline int enetc_mdio_read_c45(struct mii_bus *bus, int phy_id,
57				      int devad, int regnum)
58{ return -EINVAL; }
59static inline int enetc_mdio_write_c45(struct mii_bus *bus, int phy_id,
60				       int devad, int regnum, u16 value)
61{ return -EINVAL; }
62static inline struct enetc_hw *enetc_hw_alloc(struct device *dev,
63					      void __iomem *port_regs)
64{ return ERR_PTR(-EINVAL); }
65
66#endif
67
68#endif