LXR linux/include/linux/fsl/enetc

   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(struct mii_bus *bus, int phy_id, int regnum);
  41int enetc_mdio_write(struct mii_bus *bus, int phy_id, int regnum, u16 value);
  42struct enetc_hw *enetc_hw_alloc(struct device *dev, void __iomem *port_regs);
  43
  44#else
  45
  46static inline int enetc_mdio_read(struct mii_bus *bus, int phy_id, int regnum)
  47{ return -EINVAL; }
  48static inline int enetc_mdio_write(struct mii_bus *bus, int phy_id, int regnum,
  49                                   u16 value)
  50{ return -EINVAL; }
  51struct enetc_hw *enetc_hw_alloc(struct device *dev, void __iomem *port_regs)
  52{ return ERR_PTR(-EINVAL); }
  53
  54#endif
  55
  56#endif
  57