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体验新版 GitCode,发现更多精彩内容 >>
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fe8de492
编写于
5月 14, 2009
作者:
P
Paul Brook
浏览文件
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差异文件
I2C qdev support
Signed-off-by:
N
Paul Brook
<
paul@codesourcery.com
>
上级
b47b50fa
变更
2
隐藏空白更改
内联
并排
Showing
2 changed file
with
67 addition
and
10 deletion
+67
-10
hw/i2c.c
hw/i2c.c
+45
-9
hw/i2c.h
hw/i2c.h
+22
-1
未找到文件。
hw/i2c.c
浏览文件 @
fe8de492
...
...
@@ -7,7 +7,6 @@
* This code is licenced under the LGPL.
*/
#include "hw.h"
#include "i2c.h"
struct
i2c_bus
...
...
@@ -61,7 +60,7 @@ i2c_slave *i2c_slave_init(i2c_bus *bus, int address, int size)
dev
->
address
=
address
;
dev
->
next
=
bus
->
dev
;
bus
->
dev
=
dev
;
dev
->
bus
=
bus
;
dev
->
qdev
.
bus
=
bus
;
return
dev
;
}
...
...
@@ -94,7 +93,7 @@ int i2c_start_transfer(i2c_bus *bus, int address, int recv)
/* If the bus is already busy, assume this is a repeated
start condition. */
bus
->
current_dev
=
dev
;
dev
->
event
(
dev
,
recv
?
I2C_START_RECV
:
I2C_START_SEND
);
dev
->
info
->
event
(
dev
,
recv
?
I2C_START_RECV
:
I2C_START_SEND
);
return
0
;
}
...
...
@@ -105,7 +104,7 @@ void i2c_end_transfer(i2c_bus *bus)
if
(
!
dev
)
return
;
dev
->
event
(
dev
,
I2C_FINISH
);
dev
->
info
->
event
(
dev
,
I2C_FINISH
);
bus
->
current_dev
=
NULL
;
}
...
...
@@ -117,7 +116,7 @@ int i2c_send(i2c_bus *bus, uint8_t data)
if
(
!
dev
)
return
-
1
;
return
dev
->
send
(
dev
,
data
);
return
dev
->
info
->
send
(
dev
,
data
);
}
int
i2c_recv
(
i2c_bus
*
bus
)
...
...
@@ -127,7 +126,7 @@ int i2c_recv(i2c_bus *bus)
if
(
!
dev
)
return
-
1
;
return
dev
->
recv
(
dev
);
return
dev
->
info
->
recv
(
dev
);
}
void
i2c_nack
(
i2c_bus
*
bus
)
...
...
@@ -137,7 +136,7 @@ void i2c_nack(i2c_bus *bus)
if
(
!
dev
)
return
;
dev
->
event
(
dev
,
I2C_NACK
);
dev
->
info
->
event
(
dev
,
I2C_NACK
);
}
void
i2c_slave_save
(
QEMUFile
*
f
,
i2c_slave
*
dev
)
...
...
@@ -147,7 +146,44 @@ void i2c_slave_save(QEMUFile *f, i2c_slave *dev)
void
i2c_slave_load
(
QEMUFile
*
f
,
i2c_slave
*
dev
)
{
i2c_bus
*
bus
;
bus
=
qdev_get_bus
(
&
dev
->
qdev
);
dev
->
address
=
qemu_get_byte
(
f
);
if
(
dev
->
bus
->
saved_address
==
dev
->
address
)
dev
->
bus
->
current_dev
=
dev
;
if
(
bus
->
saved_address
==
dev
->
address
)
{
bus
->
current_dev
=
dev
;
}
}
static
void
i2c_slave_qdev_init
(
DeviceState
*
dev
,
void
*
opaque
)
{
I2CSlaveInfo
*
info
=
opaque
;
i2c_slave
*
s
=
I2C_SLAVE_FROM_QDEV
(
dev
);
s
->
info
=
info
;
s
->
bus
=
qdev_get_bus
(
dev
);
s
->
address
=
qdev_get_prop_int
(
dev
,
"address"
,
0
);
s
->
next
=
s
->
bus
->
dev
;
s
->
bus
->
dev
=
s
;
s
->
event
=
info
->
event
;
s
->
recv
=
info
->
recv
;
s
->
send
=
info
->
send
;
info
->
init
(
s
);
}
void
i2c_register_slave
(
const
char
*
name
,
int
size
,
I2CSlaveInfo
*
info
)
{
assert
(
size
>=
sizeof
(
i2c_slave
));
qdev_register
(
name
,
size
,
i2c_slave_qdev_init
,
info
);
}
DeviceState
*
i2c_create_slave
(
i2c_bus
*
bus
,
const
char
*
name
,
int
addr
)
{
DeviceState
*
dev
;
dev
=
qdev_create
(
bus
,
name
);
qdev_set_prop_int
(
dev
,
"address"
,
addr
);
qdev_init
(
dev
);
return
dev
;
}
hw/i2c.h
浏览文件 @
fe8de492
#ifndef QEMU_I2C_H
#define QEMU_I2C_H
#include "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
...
...
@@ -20,9 +22,21 @@ typedef int (*i2c_recv_cb)(i2c_slave *s);
/* Notify the slave of a bus state change. */
typedef
void
(
*
i2c_event_cb
)(
i2c_slave
*
s
,
enum
i2c_event
event
);
typedef
void
(
*
i2c_slave_initfn
)(
i2c_slave
*
dev
);
typedef
struct
{
/* Callbacks provided by the device. */
i2c_slave_initfn
init
;
i2c_event_cb
event
;
i2c_recv_cb
recv
;
i2c_send_cb
send
;
}
I2CSlaveInfo
;
struct
i2c_slave
{
/* Callbacks to be set by the device. */
DeviceState
qdev
;
I2CSlaveInfo
*
info
;
/* FIXME: These 3 should go away once all devices have been converted. */
i2c_event_cb
event
;
i2c_recv_cb
recv
;
i2c_send_cb
send
;
...
...
@@ -45,6 +59,13 @@ int i2c_recv(i2c_bus *bus);
void
i2c_slave_save
(
QEMUFile
*
f
,
i2c_slave
*
dev
);
void
i2c_slave_load
(
QEMUFile
*
f
,
i2c_slave
*
dev
);
#define I2C_SLAVE_FROM_QDEV(dev) DO_UPCAST(i2c_slave, qdev, dev)
#define FROM_I2C_SLAVE(type, dev) DO_UPCAST(type, i2c, dev)
void
i2c_register_slave
(
const
char
*
name
,
int
size
,
I2CSlaveInfo
*
type
);
DeviceState
*
i2c_create_slave
(
i2c_bus
*
bus
,
const
char
*
name
,
int
addr
);
/* max111x.c */
typedef
struct
MAX111xState
MAX111xState
;
uint32_t
max111x_read
(
void
*
opaque
);
...
...
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