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