86Box/src/include/86box/smbus.h

/*
 * 86Box    A hypervisor and IBM PC system emulator that specializes in
 *          running old operating systems and software designed for IBM
 *          PC systems and compatibles from 1981 through fairly recent
 *          system designs based on the PCI bus.
 *
 *          This file is part of the 86Box distribution.
 *
 *          Definitions for the SMBus host controllers.
 *
 *
 *
 * Authors: RichardG, <richardg867@gmail.com>
 *
 *          Copyright 2020 RichardG.
 */

#ifndef EMU_SMBUS_H
#define EMU_SMBUS_H

#define SMBUS_PIIX4_BLOCK_DATA_SIZE   32
#define SMBUS_PIIX4_BLOCK_DATA_MASK   (SMBUS_PIIX4_BLOCK_DATA_SIZE - 1)

#define SMBUS_ALI7101_BLOCK_DATA_SIZE 32
#define SMBUS_ALI7101_BLOCK_DATA_MASK (SMBUS_ALI7101_BLOCK_DATA_SIZE - 1)

#define SMBUS_SIS5595_BLOCK_DATA_SIZE 32
#define SMBUS_SIS5595_BLOCK_DATA_MASK (SMBUS_ALI7101_BLOCK_DATA_SIZE - 1)

enum {
    SMBUS_PIIX4 = 0,
    SMBUS_VIA   = 1
};

typedef struct smbus_piix4_t {
    uint32_t   local;
    uint16_t   io_base;
    int        clock;
    double     bit_period;
    uint8_t    stat;
    uint8_t    next_stat;
    uint8_t    ctl;
    uint8_t    cmd;
    uint8_t    addr;
    uint8_t    data0;
    uint8_t    data1;
    uint8_t    index;
    uint8_t    data[SMBUS_PIIX4_BLOCK_DATA_SIZE];
    pc_timer_t response_timer;
    void      *i2c;
} smbus_piix4_t;

typedef struct smbus_ali7101_t {
    uint32_t   local;
    uint16_t   io_base;
    uint8_t    stat;
    uint8_t    next_stat;
    uint8_t    ctl;
    uint8_t    cmd;
    uint8_t    addr;
    uint8_t    data0;
    uint8_t    data1;
    uint8_t    index;
    uint8_t    data[SMBUS_ALI7101_BLOCK_DATA_SIZE];
    pc_timer_t response_timer;
    void      *i2c;
} smbus_ali7101_t;

typedef struct smbus_sis5595_t {
    uint32_t   local;
    uint16_t   stat;
    uint16_t   next_stat;
    uint16_t   ctl;
    uint8_t    cmd;
    uint8_t    addr;
    uint8_t    saved_addr;
    uint8_t    block_ptr;
    uint8_t    count;
    uint8_t    data0;
    uint8_t    data1;
    uint8_t    alias;
    uint8_t    reg_ff;
    uint8_t    index;
    uint8_t    irq_enable;
    uint8_t    irq_state;
    uint8_t    data[SMBUS_SIS5595_BLOCK_DATA_SIZE];
    pc_timer_t response_timer;
    void      *i2c;
} smbus_sis5595_t;

extern void    smbus_piix4_remap(smbus_piix4_t *dev, uint16_t new_io_base, uint8_t enable);
extern void    smbus_piix4_setclock(smbus_piix4_t *dev, int clock);

extern void    smbus_ali7101_remap(smbus_ali7101_t *dev, uint16_t new_io_base, uint8_t enable);

extern void    smbus_sis5595_irq_enable(void *priv, uint8_t enable);

extern uint8_t smbus_sis5595_read_index(void *priv);
extern uint8_t smbus_sis5595_read_data(void *priv);
extern void    smbus_sis5595_write_index(void *priv, uint8_t val);
extern void    smbus_sis5595_write_data(void *priv, uint8_t val);

#ifdef EMU_DEVICE_H
extern const device_t piix4_smbus_device;
extern const device_t via_smbus_device;

extern const device_t ali7101_smbus_device;

extern const device_t sis5595_smbus_device;
#endif

#endif /*EMU_SMBUS_H*/