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I2C qdev support

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Signed-off-by: Paul Brook <paul@codesourcery.com>
This commit is contained in:
Paul Brook 2009-05-14 22:35:08 +01:00
parent b47b50fa9e
commit fe8de49258
2 changed files with 67 additions and 10 deletions
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54
hw/i2c.c
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@ -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;
}