107 lines
3.3 KiB
C
107 lines
3.3 KiB
C
#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
|