drivers/i2c/busses/i2c-piix4.h

   1 /* SPDX-License-Identifier: GPL-2.0-or-later */
   2 /*
   3  * PIIX4/SB800 SMBus Interfaces
   4  *
   5  * Copyright (c) 2024, Advanced Micro Devices, Inc.
   6  * All Rights Reserved.
   7  *
   8  * Authors: Shyam Sundar S K <Shyam-sundar.S-k@amd.com>
   9  *          Sanket Goswami <Sanket.Goswami@amd.com>
  10  */
  11
  12 #ifndef I2C_PIIX4_H
  13 #define I2C_PIIX4_H
  14
  15 #include <linux/types.h>
  16
  17 /* PIIX4 SMBus address offsets */
  18 #define SMBHSTSTS       (0x00 + piix4_smba)
  19 #define SMBHSLVSTS      (0x01 + piix4_smba)
  20 #define SMBHSTCNT       (0x02 + piix4_smba)
  21 #define SMBHSTCMD       (0x03 + piix4_smba)
  22 #define SMBHSTADD       (0x04 + piix4_smba)
  23 #define SMBHSTDAT0      (0x05 + piix4_smba)
  24 #define SMBHSTDAT1      (0x06 + piix4_smba)
  25 #define SMBBLKDAT       (0x07 + piix4_smba)
  26 #define SMBSLVCNT       (0x08 + piix4_smba)
  27 #define SMBSHDWCMD      (0x09 + piix4_smba)
  28 #define SMBSLVEVT       (0x0A + piix4_smba)
  29 #define SMBSLVDAT       (0x0C + piix4_smba)
  30
  31 /* PIIX4 constants */
  32 #define PIIX4_BLOCK_DATA        0x14
  33
  34 struct sb800_mmio_cfg {
  35         void __iomem *addr;
  36         bool use_mmio;
  37 };
  38
  39 int piix4_sb800_port_sel(u8 port, struct sb800_mmio_cfg *mmio_cfg);
  40 int piix4_transaction(struct i2c_adapter *piix4_adapter, unsigned short piix4_smba);
  41 int piix4_sb800_region_request(struct device *dev, struct sb800_mmio_cfg *mmio_cfg);
  42 void piix4_sb800_region_release(struct device *dev, struct sb800_mmio_cfg *mmio_cfg);
  43
  44 #endif /* I2C_PIIX4_H */