drivers/net/dsa/mv88e6xxx/smi.h

   1 /*
   2  * Marvell 88E6xxx System Management Interface (SMI) support
   3  *
   4  * Copyright (c) 2008 Marvell Semiconductor
   5  *
   6  * Copyright (c) 2019 Vivien Didelot <vivien.didelot@gmail.com>
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 2 of the License, or
  11  * (at your option) any later version.
  12  */
  13
  14 #ifndef _MV88E6XXX_SMI_H
  15 #define _MV88E6XXX_SMI_H
  16
  17 #include "chip.h"
  18
  19 /* Offset 0x00: SMI Command Register */
  20 #define MV88E6XXX_SMI_CMD                       0x00
  21 #define MV88E6XXX_SMI_CMD_BUSY                  0x8000
  22 #define MV88E6XXX_SMI_CMD_MODE_MASK             0x1000
  23 #define MV88E6XXX_SMI_CMD_MODE_45               0x0000
  24 #define MV88E6XXX_SMI_CMD_MODE_22               0x1000
  25 #define MV88E6XXX_SMI_CMD_OP_MASK               0x0c00
  26 #define MV88E6XXX_SMI_CMD_OP_22_WRITE           0x0400
  27 #define MV88E6XXX_SMI_CMD_OP_22_READ            0x0800
  28 #define MV88E6XXX_SMI_CMD_OP_45_WRITE_ADDR      0x0000
  29 #define MV88E6XXX_SMI_CMD_OP_45_WRITE_DATA      0x0400
  30 #define MV88E6XXX_SMI_CMD_OP_45_READ_DATA       0x0800
  31 #define MV88E6XXX_SMI_CMD_OP_45_READ_DATA_INC   0x0c00
  32 #define MV88E6XXX_SMI_CMD_DEV_ADDR_MASK         0x003e
  33 #define MV88E6XXX_SMI_CMD_REG_ADDR_MASK         0x001f
  34
  35 /* Offset 0x01: SMI Data Register */
  36 #define MV88E6XXX_SMI_DATA                      0x01
  37
  38 int mv88e6xxx_smi_init(struct mv88e6xxx_chip *chip,
  39                        struct mii_bus *bus, int sw_addr);
  40
  41 static inline int mv88e6xxx_smi_read(struct mv88e6xxx_chip *chip,
  42                                      int dev, int reg, u16 *data)
  43 {
  44         if (chip->smi_ops && chip->smi_ops->read)
  45                 return chip->smi_ops->read(chip, dev, reg, data);
  46
  47         return -EOPNOTSUPP;
  48 }
  49
  50 static inline int mv88e6xxx_smi_write(struct mv88e6xxx_chip *chip,
  51                                       int dev, int reg, u16 data)
  52 {
  53         if (chip->smi_ops && chip->smi_ops->write)
  54                 return chip->smi_ops->write(chip, dev, reg, data);
  55
  56         return -EOPNOTSUPP;
  57 }
  58
  59 #endif /* _MV88E6XXX_SMI_H */