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
  34 int mv88e6xxx_smi_init(struct mv88e6xxx_chip *chip,
  35                        struct mii_bus *bus, int sw_addr);
  36
  37 static 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
  46 static 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 */