6 /* The QEMU I2C implementation only supports simple transfers that complete
7 immediately. It does not support slave devices that need to be able to
8 defer their response (eg. CPU slave interfaces where the data is supplied
9 by the device driver in response to an interrupt). */
15 I2C_NACK
/* Masker NACKed a receive byte. */
18 typedef struct I2CSlave I2CSlave
;
20 #define TYPE_I2C_SLAVE "i2c-slave"
21 #define I2C_SLAVE(obj) \
22 OBJECT_CHECK(I2CSlave, (obj), TYPE_I2C_SLAVE)
23 #define I2C_SLAVE_CLASS(klass) \
24 OBJECT_CLASS_CHECK(I2CSlaveClass, (klass), TYPE_I2C_SLAVE)
25 #define I2C_SLAVE_GET_CLASS(obj) \
26 OBJECT_GET_CLASS(I2CSlaveClass, (obj), TYPE_I2C_SLAVE)
28 typedef struct I2CSlaveClass
30 DeviceClass parent_class
;
32 /* Callbacks provided by the device. */
33 int (*init
)(I2CSlave
*dev
);
35 /* Master to slave. Returns non-zero for a NAK, 0 for success. */
36 int (*send
)(I2CSlave
*s
, uint8_t data
);
39 * Slave to master. This cannot fail, the device should always
40 * return something here. Negative values probably result in 0xff
41 * and a possible log from the driver, and shouldn't be used.
43 int (*recv
)(I2CSlave
*s
);
46 * Notify the slave of a bus state change. For start event,
47 * returns non-zero to NAK an operation. For other events the
48 * return code is not used and should be zero.
50 int (*event
)(I2CSlave
*s
, enum i2c_event event
);
57 /* Remaining fields for internal use by the I2C code. */
61 I2CBus
*i2c_init_bus(DeviceState
*parent
, const char *name
);
62 void i2c_set_slave_address(I2CSlave
*dev
, uint8_t address
);
63 int i2c_bus_busy(I2CBus
*bus
);
64 int i2c_start_transfer(I2CBus
*bus
, uint8_t address
, int recv
);
65 void i2c_end_transfer(I2CBus
*bus
);
66 void i2c_nack(I2CBus
*bus
);
67 int i2c_send_recv(I2CBus
*bus
, uint8_t *data
, bool send
);
68 int i2c_send(I2CBus
*bus
, uint8_t data
);
69 int i2c_recv(I2CBus
*bus
);
71 DeviceState
*i2c_create_slave(I2CBus
*bus
, const char *name
, uint8_t addr
);
74 void wm8750_data_req_set(DeviceState
*dev
,
75 void (*data_req
)(void *, int, int), void *opaque
);
76 void wm8750_dac_dat(void *opaque
, uint32_t sample
);
77 uint32_t wm8750_adc_dat(void *opaque
);
78 void *wm8750_dac_buffer(void *opaque
, int samples
);
79 void wm8750_dac_commit(void *opaque
);
80 void wm8750_set_bclk_in(void *opaque
, int new_hz
);
83 void lm832x_key_event(DeviceState
*dev
, int key
, int state
);
85 extern const VMStateDescription vmstate_i2c_slave
;
87 #define VMSTATE_I2C_SLAVE(_field, _state) { \
88 .name = (stringify(_field)), \
89 .size = sizeof(I2CSlave), \
90 .vmsd = &vmstate_i2c_slave, \
91 .flags = VMS_STRUCT, \
92 .offset = vmstate_offset_value(_state, _field, I2CSlave), \