root / hw / i2c.h @ 28366c3a
History | View | Annotate | Download (2.4 kB)
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 |
/* max7310.c */
|
63 |
void max7310_reset(i2c_slave *i2c);
|
64 |
qemu_irq *max7310_gpio_in_get(i2c_slave *i2c); |
65 |
void max7310_gpio_out_set(i2c_slave *i2c, int line, qemu_irq handler); |
66 |
|
67 |
/* wm8750.c */
|
68 |
void wm8750_data_req_set(DeviceState *dev,
|
69 |
void (*data_req)(void *, int, int), void *opaque); |
70 |
void wm8750_dac_dat(void *opaque, uint32_t sample); |
71 |
uint32_t wm8750_adc_dat(void *opaque);
|
72 |
void *wm8750_dac_buffer(void *opaque, int samples); |
73 |
void wm8750_dac_commit(void *opaque); |
74 |
void wm8750_set_bclk_in(void *opaque, int new_hz); |
75 |
|
76 |
/* tmp105.c */
|
77 |
void tmp105_set(i2c_slave *i2c, int temp); |
78 |
|
79 |
/* lm832x.c */
|
80 |
void lm832x_key_event(i2c_slave *i2c, int key, int state); |
81 |
|
82 |
#endif
|