目的：对USB作深入学习，在此留下笔记。欢迎讨论。
[Linux 3.2] [driver/usb/core/driver.c]
函数：usb_register_device_driver
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- int usb_register_device_driver(struct usb_device_driver *new_udriver,
- struct module *owner)
- {
- int retval = 0;
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- if (usb_disabled())
- return -ENODEV;
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- new_udriver->drvwrap.for_devices = 1;
- new_udriver->drvwrap.driver.name = (char *) new_udriver->name;
- new_udriver->drvwrap.driver.bus = &usb_bus_type;
- new_udriver->drvwrap.driver.probe = usb_probe_device;
- new_udriver->drvwrap.driver.remove = usb_unbind_device;
- new_udriver->drvwrap.driver.owner = owner;
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- retval = driver_register(&new_udriver->drvwrap.driver);
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- if (!retval) {
- pr_info("%s: registered new device driver %s\n",
- usbcore_name, new_udriver->name);
- usbfs_update_special();
- } else {
- printk(KERN_ERR "%s: error %d registering device "
- " driver %s\n",
- usbcore_name, retval, new_udriver->name);
- }
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- return retval;
- }
- EXPORT_SYMBOL_GPL(usb_register_device_driver);
此过程是注册一个usb的通用程驱动。驱动注册的过程与usbfs驱动注册类似。其结果是：在/sys/bus/usb/drivers/下面创建usb目录。在usb目录下面创建如下属性文件。
bind uevent unbind
至此，整个usb core的初始化过程完成。
后面将进入到USB host controller的初始化。
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