87 lines
2.6 KiB
C
87 lines
2.6 KiB
C
#ifndef QEMU_I2C_H
|
|
#define QEMU_I2C_H
|
|
|
|
#include "hw/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. */
|
|
};
|
|
|
|
typedef struct I2CSlave I2CSlave;
|
|
|
|
#define TYPE_I2C_SLAVE "i2c-slave"
|
|
#define I2C_SLAVE(obj) \
|
|
OBJECT_CHECK(I2CSlave, (obj), TYPE_I2C_SLAVE)
|
|
#define I2C_SLAVE_CLASS(klass) \
|
|
OBJECT_CLASS_CHECK(I2CSlaveClass, (klass), TYPE_I2C_SLAVE)
|
|
#define I2C_SLAVE_GET_CLASS(obj) \
|
|
OBJECT_GET_CLASS(I2CSlaveClass, (obj), TYPE_I2C_SLAVE)
|
|
|
|
typedef struct I2CSlaveClass
|
|
{
|
|
DeviceClass parent_class;
|
|
|
|
/* Callbacks provided by the device. */
|
|
int (*init)(I2CSlave *dev);
|
|
|
|
/* Master to slave. */
|
|
int (*send)(I2CSlave *s, uint8_t data);
|
|
|
|
/* Slave to master. */
|
|
int (*recv)(I2CSlave *s);
|
|
|
|
/* Notify the slave of a bus state change. */
|
|
void (*event)(I2CSlave *s, enum i2c_event event);
|
|
} I2CSlaveClass;
|
|
|
|
struct I2CSlave
|
|
{
|
|
DeviceState qdev;
|
|
|
|
/* Remaining fields for internal use by the I2C code. */
|
|
uint8_t address;
|
|
};
|
|
|
|
I2CBus *i2c_init_bus(DeviceState *parent, const char *name);
|
|
void i2c_set_slave_address(I2CSlave *dev, uint8_t address);
|
|
int i2c_bus_busy(I2CBus *bus);
|
|
int i2c_start_transfer(I2CBus *bus, uint8_t address, int recv);
|
|
void i2c_end_transfer(I2CBus *bus);
|
|
void i2c_nack(I2CBus *bus);
|
|
int i2c_send(I2CBus *bus, uint8_t data);
|
|
int i2c_recv(I2CBus *bus);
|
|
|
|
DeviceState *i2c_create_slave(I2CBus *bus, const char *name, uint8_t addr);
|
|
|
|
/* wm8750.c */
|
|
void wm8750_data_req_set(DeviceState *dev,
|
|
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);
|
|
|
|
/* lm832x.c */
|
|
void lm832x_key_event(DeviceState *dev, int key, int state);
|
|
|
|
extern const VMStateDescription vmstate_i2c_slave;
|
|
|
|
#define VMSTATE_I2C_SLAVE(_field, _state) { \
|
|
.name = (stringify(_field)), \
|
|
.size = sizeof(I2CSlave), \
|
|
.vmsd = &vmstate_i2c_slave, \
|
|
.flags = VMS_STRUCT, \
|
|
.offset = vmstate_offset_value(_state, _field, I2CSlave), \
|
|
}
|
|
|
|
#endif
|