qdev: don't access name through info
[qemu.git] / hw / i2c.h
1 #ifndef QEMU_I2C_H
2 #define QEMU_I2C_H
3
4 #include "qdev.h"
5
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). */
10
11 enum i2c_event {
12 I2C_START_RECV,
13 I2C_START_SEND,
14 I2C_FINISH,
15 I2C_NACK /* Masker NACKed a receive byte. */
16 };
17
18 /* Master to slave. */
19 typedef int (*i2c_send_cb)(i2c_slave *s, uint8_t data);
20 /* Slave to master. */
21 typedef int (*i2c_recv_cb)(i2c_slave *s);
22 /* Notify the slave of a bus state change. */
23 typedef void (*i2c_event_cb)(i2c_slave *s, enum i2c_event event);
24
25 typedef int (*i2c_slave_initfn)(i2c_slave *dev);
26
27 typedef struct {
28 DeviceInfo qdev;
29
30 /* Callbacks provided by the device. */
31 i2c_slave_initfn init;
32 i2c_event_cb event;
33 i2c_recv_cb recv;
34 i2c_send_cb send;
35 } I2CSlaveInfo;
36
37 struct i2c_slave
38 {
39 DeviceState qdev;
40 I2CSlaveInfo *info;
41
42 /* Remaining fields for internal use by the I2C code. */
43 uint8_t address;
44 };
45
46 i2c_bus *i2c_init_bus(DeviceState *parent, const char *name);
47 void i2c_set_slave_address(i2c_slave *dev, uint8_t address);
48 int i2c_bus_busy(i2c_bus *bus);
49 int i2c_start_transfer(i2c_bus *bus, uint8_t address, int recv);
50 void i2c_end_transfer(i2c_bus *bus);
51 void i2c_nack(i2c_bus *bus);
52 int i2c_send(i2c_bus *bus, uint8_t data);
53 int i2c_recv(i2c_bus *bus);
54
55 #define I2C_SLAVE_FROM_QDEV(dev) DO_UPCAST(i2c_slave, qdev, dev)
56 #define FROM_I2C_SLAVE(type, dev) DO_UPCAST(type, i2c, dev)
57
58 void i2c_register_slave(I2CSlaveInfo *type);
59
60 DeviceState *i2c_create_slave(i2c_bus *bus, const char *name, uint8_t addr);
61
62 /* wm8750.c */
63 void wm8750_data_req_set(DeviceState *dev,
64 void (*data_req)(void *, int, int), void *opaque);
65 void wm8750_dac_dat(void *opaque, uint32_t sample);
66 uint32_t wm8750_adc_dat(void *opaque);
67 void *wm8750_dac_buffer(void *opaque, int samples);
68 void wm8750_dac_commit(void *opaque);
69 void wm8750_set_bclk_in(void *opaque, int new_hz);
70
71 /* tmp105.c */
72 void tmp105_set(i2c_slave *i2c, int temp);
73
74 /* lm832x.c */
75 void lm832x_key_event(DeviceState *dev, int key, int state);
76
77 extern const VMStateDescription vmstate_i2c_slave;
78
79 #define VMSTATE_I2C_SLAVE(_field, _state) { \
80 .name = (stringify(_field)), \
81 .size = sizeof(i2c_slave), \
82 .vmsd = &vmstate_i2c_slave, \
83 .flags = VMS_STRUCT, \
84 .offset = vmstate_offset_value(_state, _field, i2c_slave), \
85 }
86
87 #endif