/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
 * PIIX4/SB800 SMBus Interfaces
 *
 * Copyright (c) 2024, Advanced Micro Devices, Inc.
 * All Rights Reserved.
 *
 * Authors: Shyam Sundar S K <Shyam-sundar.S-k@amd.com>
 *          Sanket Goswami <Sanket.Goswami@amd.com>
 */

#ifndef I2C_PIIX4_H
#define I2C_PIIX4_H

#include <linux/types.h>

/* PIIX4 SMBus address offsets */
#define SMBHSTSTS       (0x00 + piix4_smba)
#define SMBHSLVSTS      (0x01 + piix4_smba)
#define SMBHSTCNT       (0x02 + piix4_smba)
#define SMBHSTCMD       (0x03 + piix4_smba)
#define SMBHSTADD       (0x04 + piix4_smba)
#define SMBHSTDAT0      (0x05 + piix4_smba)
#define SMBHSTDAT1      (0x06 + piix4_smba)
#define SMBBLKDAT       (0x07 + piix4_smba)
#define SMBSLVCNT       (0x08 + piix4_smba)
#define SMBSHDWCMD      (0x09 + piix4_smba)
#define SMBSLVEVT       (0x0A + piix4_smba)
#define SMBSLVDAT       (0x0C + piix4_smba)

/* PIIX4 constants */
#define PIIX4_BLOCK_DATA        0x14

struct sb800_mmio_cfg {
        void __iomem *addr;
        bool use_mmio;
};

int piix4_sb800_port_sel(u8 port, struct sb800_mmio_cfg *mmio_cfg);
int piix4_transaction(struct i2c_adapter *piix4_adapter, unsigned short piix4_smba);
int piix4_sb800_region_request(struct device *dev, struct sb800_mmio_cfg *mmio_cfg);
void piix4_sb800_region_release(struct device *dev, struct sb800_mmio_cfg *mmio_cfg);

#endif /* I2C_PIIX4_H */