qemu/hw/i2c.h

#ifndef QEMU_I2C_H
#define QEMU_I2C_H

#include "qdev.h"

/* The QEMU I2C implementation only supports simple transfers that complete
   immediately.  It does not support slave devices that need to be able to
   defer their response (eg. CPU slave interfaces where the data is supplied
   by the device driver in response to an interrupt).  */

enum i2c_event {
    I2C_START_RECV,
    I2C_START_SEND,
    I2C_FINISH,
    I2C_NACK /* Masker NACKed a receive byte.  */
};

/* Master to slave.  */
typedef int (*i2c_send_cb)(i2c_slave *s, uint8_t data);
/* Slave to master.  */
typedef int (*i2c_recv_cb)(i2c_slave *s);
/* Notify the slave of a bus state change.  */
typedef void (*i2c_event_cb)(i2c_slave *s, enum i2c_event event);

typedef void (*i2c_slave_initfn)(i2c_slave *dev);

typedef struct {
    /* Callbacks provided by the device.  */
    i2c_slave_initfn init;
    i2c_event_cb event;
    i2c_recv_cb recv;
    i2c_send_cb send;
} I2CSlaveInfo;

struct i2c_slave
{
    DeviceState qdev;
    I2CSlaveInfo *info;
    /* FIXME: These 3 should go away once all devices have been converted.  */
    i2c_event_cb event;
    i2c_recv_cb recv;
    i2c_send_cb send;

    /* Remaining fields for internal use by the I2C code.  */
    int address;
    void *next;
    i2c_bus *bus;
};

i2c_bus *i2c_init_bus(void);
i2c_slave *i2c_slave_init(i2c_bus *bus, int address, int size);
void i2c_set_slave_address(i2c_slave *dev, int address);
int i2c_bus_busy(i2c_bus *bus);
int i2c_start_transfer(i2c_bus *bus, int address, int recv);
void i2c_end_transfer(i2c_bus *bus);
void i2c_nack(i2c_bus *bus);
int i2c_send(i2c_bus *bus, uint8_t data);
int i2c_recv(i2c_bus *bus);
void i2c_slave_save(QEMUFile *f, i2c_slave *dev);
void i2c_slave_load(QEMUFile *f, i2c_slave *dev);

#define I2C_SLAVE_FROM_QDEV(dev) DO_UPCAST(i2c_slave, qdev, dev)
#define FROM_I2C_SLAVE(type, dev) DO_UPCAST(type, i2c, dev)

void i2c_register_slave(const char *name, int size, I2CSlaveInfo *type);

DeviceState *i2c_create_slave(i2c_bus *bus, const char *name, int addr);

/* max111x.c */
typedef struct MAX111xState MAX111xState;
uint32_t max111x_read(void *opaque);
void max111x_write(void *opaque, uint32_t value);
MAX111xState *max1110_init(qemu_irq cb);
MAX111xState *max1111_init(qemu_irq cb);
void max111x_set_input(MAX111xState *s, int line, uint8_t value);

/* max7310.c */
void max7310_reset(i2c_slave *i2c);
qemu_irq *max7310_gpio_in_get(i2c_slave *i2c);
void max7310_gpio_out_set(i2c_slave *i2c, int line, qemu_irq handler);

/* wm8750.c */
i2c_slave *wm8750_init(i2c_bus *bus);
void wm8750_reset(i2c_slave *i2c);
void wm8750_data_req_set(i2c_slave *i2c,
                void (*data_req)(void *, int, int), void *opaque);
void wm8750_dac_dat(void *opaque, uint32_t sample);
uint32_t wm8750_adc_dat(void *opaque);
void *wm8750_dac_buffer(void *opaque, int samples);
void wm8750_dac_commit(void *opaque);
void wm8750_set_bclk_in(void *opaque, int new_hz);

/* twl92230.c */
i2c_slave *twl92230_init(i2c_bus *bus, qemu_irq irq);
qemu_irq *twl92230_gpio_in_get(i2c_slave *i2c);
void twl92230_gpio_out_set(i2c_slave *i2c, int line, qemu_irq handler);

/* tmp105.c */
struct i2c_slave *tmp105_init(i2c_bus *bus, qemu_irq alarm);
void tmp105_reset(i2c_slave *i2c);
void tmp105_set(i2c_slave *i2c, int temp);

/* lm832x.c */
void lm832x_key_event(i2c_slave *i2c, int key, int state);

#endif