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