2007-05-23 00:03:59 +00:00
|
|
|
#ifndef QEMU_I2C_H
|
|
|
|
#define QEMU_I2C_H
|
|
|
|
|
2009-05-14 21:35:08 +00:00
|
|
|
#include "qdev.h"
|
|
|
|
|
2007-05-23 00:03:59 +00:00
|
|
|
/* 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,
|
2007-07-11 22:48:58 +00:00
|
|
|
I2C_NACK /* Masker NACKed a receive byte. */
|
2007-05-23 00:03:59 +00:00
|
|
|
};
|
|
|
|
|
2011-12-05 02:28:27 +00:00
|
|
|
typedef struct I2CSlave I2CSlave;
|
|
|
|
|
2011-12-05 02:39:20 +00:00
|
|
|
#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)
|
2007-05-23 00:03:59 +00:00
|
|
|
|
2011-12-05 02:39:20 +00:00
|
|
|
typedef struct I2CSlaveClass
|
|
|
|
{
|
|
|
|
DeviceClass parent_class;
|
2009-05-22 23:05:19 +00:00
|
|
|
|
2009-05-14 21:35:08 +00:00
|
|
|
/* Callbacks provided by the device. */
|
2011-12-05 02:39:20 +00:00
|
|
|
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;
|
2009-05-14 21:35:08 +00:00
|
|
|
|
2011-12-05 02:28:27 +00:00
|
|
|
struct I2CSlave
|
2007-05-23 00:03:59 +00:00
|
|
|
{
|
2009-05-14 21:35:08 +00:00
|
|
|
DeviceState qdev;
|
2007-05-23 00:03:59 +00:00
|
|
|
|
|
|
|
/* Remaining fields for internal use by the I2C code. */
|
2009-09-29 20:48:26 +00:00
|
|
|
uint8_t address;
|
2007-05-23 00:03:59 +00:00
|
|
|
};
|
|
|
|
|
2009-05-22 23:05:19 +00:00
|
|
|
i2c_bus *i2c_init_bus(DeviceState *parent, const char *name);
|
2011-12-05 02:28:27 +00:00
|
|
|
void i2c_set_slave_address(I2CSlave *dev, uint8_t address);
|
2007-05-23 00:03:59 +00:00
|
|
|
int i2c_bus_busy(i2c_bus *bus);
|
2009-09-29 20:48:26 +00:00
|
|
|
int i2c_start_transfer(i2c_bus *bus, uint8_t address, int recv);
|
2007-05-23 00:03:59 +00:00
|
|
|
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);
|
|
|
|
|
2011-12-05 02:28:27 +00:00
|
|
|
#define I2C_SLAVE_FROM_QDEV(dev) DO_UPCAST(I2CSlave, qdev, dev)
|
2009-05-14 21:35:08 +00:00
|
|
|
#define FROM_I2C_SLAVE(type, dev) DO_UPCAST(type, i2c, dev)
|
|
|
|
|
2009-09-29 20:48:26 +00:00
|
|
|
DeviceState *i2c_create_slave(i2c_bus *bus, const char *name, uint8_t addr);
|
2009-05-14 21:35:08 +00:00
|
|
|
|
2007-05-23 22:04:23 +00:00
|
|
|
/* wm8750.c */
|
2009-05-14 21:35:08 +00:00
|
|
|
void wm8750_data_req_set(DeviceState *dev,
|
2007-05-23 22:04:23 +00:00
|
|
|
void (*data_req)(void *, int, int), void *opaque);
|
|
|
|
void wm8750_dac_dat(void *opaque, uint32_t sample);
|
|
|
|
uint32_t wm8750_adc_dat(void *opaque);
|
2008-04-26 12:00:18 +00:00
|
|
|
void *wm8750_dac_buffer(void *opaque, int samples);
|
|
|
|
void wm8750_dac_commit(void *opaque);
|
2008-11-12 17:36:08 +00:00
|
|
|
void wm8750_set_bclk_in(void *opaque, int new_hz);
|
2007-05-23 22:04:23 +00:00
|
|
|
|
2008-05-09 22:16:11 +00:00
|
|
|
/* lm832x.c */
|
2011-07-29 15:35:18 +00:00
|
|
|
void lm832x_key_event(DeviceState *dev, int key, int state);
|
2008-05-09 22:16:11 +00:00
|
|
|
|
2012-01-13 16:07:20 +00:00
|
|
|
extern const VMStateDescription vmstate_i2c_slave;
|
|
|
|
|
|
|
|
#define VMSTATE_I2C_SLAVE(_field, _state) { \
|
|
|
|
.name = (stringify(_field)), \
|
2011-12-05 02:28:27 +00:00
|
|
|
.size = sizeof(I2CSlave), \
|
2012-01-13 16:07:20 +00:00
|
|
|
.vmsd = &vmstate_i2c_slave, \
|
|
|
|
.flags = VMS_STRUCT, \
|
2011-12-05 02:28:27 +00:00
|
|
|
.offset = vmstate_offset_value(_state, _field, I2CSlave), \
|
2012-01-13 16:07:20 +00:00
|
|
|
}
|
|
|
|
|
2007-05-23 00:03:59 +00:00
|
|
|
#endif
|