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#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/device.h>
#include "mmapbus.h"
static int mmap_match(struct device *dev, struct device_driver *driver)
{
return !strncmp(dev->bus_id, driver->name, strlen(driver->name));
}
static int mmap_uevent(struct device *dev, char **envp, int num_envp, char *buffer, int buffer_size)
{
envp[0] = buffer;
envp[1] = NULL;
return 0;
}
static void mmap_bus_release(struct device *dev)
{
}
static void mmap_dev_release(struct device *dev)
{
}
static struct bus_type mmap_bus_type = {
.name = "mmap",
.match = mmap_match,
.uevent = mmap_uevent,
};
static struct device mmap_bus = {
.bus_id = "mmap0",
.release = mmap_bus_release,
};
int register_mmap_device(struct mmap_device *dev)
{
dev->dev.bus = &mmap_bus_type;
dev->dev.parent = &mmap_bus;
dev->dev.release = mmap_dev_release;
strncpy(dev->dev.bus_id, dev->name, BUS_ID_SIZE);
return device_register(&dev->dev);
}
void unregister_mmap_device(struct mmap_device *dev)
{
device_unregister(&dev->dev);
}
EXPORT_SYMBOL(register_mmap_device);
EXPORT_SYMBOL(unregister_mmap_device);
int register_mmap_driver(struct mmap_driver *driver)
{
driver->driver.bus = &mmap_bus_type;
return driver_register(&driver->driver);
}
void unregister_mmap_driver(struct mmap_driver *driver)
{
driver_unregister(&driver->driver);
}
EXPORT_SYMBOL(register_mmap_driver);
EXPORT_SYMBOL(unregister_mmap_driver);
int register_mmap_bus(void)
{
int ret = 0;
if ((ret = bus_register(&mmap_bus_type)) < 0)
goto bus_type_reg;
if ((ret = device_register(&mmap_bus)) < 0)
goto bus_reg;
return ret;
bus_reg:
bus_unregister(&mmap_bus_type);
bus_type_reg:
return ret;
}
void unregister_mmap_bus(void)
{
device_unregister(&mmap_bus);
bus_unregister(&mmap_bus_type);
}
EXPORT_SYMBOL(register_mmap_bus);
EXPORT_SYMBOL(unregister_mmap_bus);
MODULE_AUTHOR("Alexander Landau <landau.alex@gmail.com>");
MODULE_LICENSE("GPL");
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