LXR linux/drivers/net/dsa/mv88e6xxx/smi.h

   1/* SPDX-License-Identifier: GPL-2.0-or-later */
   2/*
   3 * Marvell 88E6xxx System Management Interface (SMI) support
   4 *
   5 * Copyright (c) 2008 Marvell Semiconductor
   6 *
   7 * Copyright (c) 2019 Vivien Didelot <vivien.didelot@gmail.com>
   8 */
   9
  10#ifndef _MV88E6XXX_SMI_H
  11#define _MV88E6XXX_SMI_H
  12
  13#include "chip.h"
  14
  15/* Offset 0x00: SMI Command Register */
  16#define MV88E6XXX_SMI_CMD                       0x00
  17#define MV88E6XXX_SMI_CMD_BUSY                  0x8000
  18#define MV88E6XXX_SMI_CMD_MODE_MASK             0x1000
  19#define MV88E6XXX_SMI_CMD_MODE_45               0x0000
  20#define MV88E6XXX_SMI_CMD_MODE_22               0x1000
  21#define MV88E6XXX_SMI_CMD_OP_MASK               0x0c00
  22#define MV88E6XXX_SMI_CMD_OP_22_WRITE           0x0400
  23#define MV88E6XXX_SMI_CMD_OP_22_READ            0x0800
  24#define MV88E6XXX_SMI_CMD_OP_45_WRITE_ADDR      0x0000
  25#define MV88E6XXX_SMI_CMD_OP_45_WRITE_DATA      0x0400
  26#define MV88E6XXX_SMI_CMD_OP_45_READ_DATA       0x0800
  27#define MV88E6XXX_SMI_CMD_OP_45_READ_DATA_INC   0x0c00
  28#define MV88E6XXX_SMI_CMD_DEV_ADDR_MASK         0x003e
  29#define MV88E6XXX_SMI_CMD_REG_ADDR_MASK         0x001f
  30
  31/* Offset 0x01: SMI Data Register */
  32#define MV88E6XXX_SMI_DATA                      0x01
  33
  34int mv88e6xxx_smi_init(struct mv88e6xxx_chip *chip,
  35                       struct mii_bus *bus, int sw_addr);
  36
  37static inline int mv88e6xxx_smi_read(struct mv88e6xxx_chip *chip,
  38                                     int dev, int reg, u16 *data)
  39{
  40        if (chip->smi_ops && chip->smi_ops->read)
  41                return chip->smi_ops->read(chip, dev, reg, data);
  42
  43        return -EOPNOTSUPP;
  44}
  45
  46static inline int mv88e6xxx_smi_write(struct mv88e6xxx_chip *chip,
  47                                      int dev, int reg, u16 data)
  48{
  49        if (chip->smi_ops && chip->smi_ops->write)
  50                return chip->smi_ops->write(chip, dev, reg, data);
  51
  52        return -EOPNOTSUPP;
  53}
  54
  55#endif /* _MV88E6XXX_SMI_H */
  56