Linux USB subsystem --- register generic usb driver

目的：對USB作深入學習，在此留下筆記。歡迎討論。

[Linux 3.2] [driver/usb/core/driver.c]

函數：usb_register_device_driver

1. /**
2. * usb_register_device_driver - register a USB device (not interface) driver
3. * @new_udriver: USB operations for the device driver
4. * @owner: module owner of this driver.
5. *
6. * Registers a USB device driver with the USB core. The list of
7. * unattached devices will be rescanned whenever a new driver is
8. * added, allowing the new driver to attach to any recognized devices.
9. * Returns a negative error code on failure and 0 on success.
10. */
11. int usb_register_device_driver(struct usb_device_driver *new_udriver,
12. struct module *owner)
13. {
14. int retval = 0;
16. if (usb_disabled())
17. return -ENODEV;
19. new_udriver->drvwrap.for_devices = 1;
20. new_udriver->drvwrap.driver.name = (char *) new_udriver->name;
21. new_udriver->drvwrap.driver.bus = &usb_bus_type;
22. new_udriver->drvwrap.driver.probe = usb_probe_device;
23. new_udriver->drvwrap.driver.remove = usb_unbind_device;
24. new_udriver->drvwrap.driver.owner = owner;
26. retval = driver_register(&new_udriver->drvwrap.driver);
28. if (!retval) {
29. pr_info("%s: registered new device driver %s\n",
30. usbcore_name, new_udriver->name);
31. usbfs_update_special();
32. } else {
33. printk(KERN_ERR "%s: error %d registering device "
34. " driver %s\n",
35. usbcore_name, retval, new_udriver->name);
36. }
38. return retval;
39. }
40. EXPORT_SYMBOL_GPL(usb_register_device_driver);

bind uevent unbind

至此，整個usb core的初始化過程完成。

後面將進入到USB host controller的初始化。