Scsi - Index of

511 * @driver: the driver model core driver structure.
512 *
513 * USB drivers must provide a name, probe() and disconnect() methods,
514 * and an id_table. Other driver fields are optional.
515 *
516 * The id_table is used in hotplugging. It holds a set of descriptors,
517 * and specialized data may be associated with each entry. That table
518 * is used by both user and kernel mode hotplugging support.
519 *
520 * The probe() and disconnect() methods are called in a context where
521 * they can sleep, but they should avoid abusing the privilege. Most
522 * work to connect to a device should be done when the device is opened,
523 * and undone at the last close. The disconnect code needs to address
524 * concurrency issues with respect to open() and close() methods, as
525 * well as forcing all pending I/O requests to complete (by unlinking
526 * them as necessary, and blocking until the unlinks complete).
527 */
528 struct usb_driver {
529 struct module *owner;
530
531 const char *name;
532
533 int (*probe) (struct usb_interface *intf,
534 const struct usb_device_id *id);
535
536 void (*disconnect) (struct usb_interface *intf);
537
538 int (*ioctl) (struct usb_interface *intf, unsigned int code, void *buf);
539
540 int (*suspend) (struct usb_interface *intf, u32 state);
541 int (*resume) (struct usb_interface *intf);
542
543 const struct usb_device_id *id_table;
544
15
545 struct device_driver driver;
546 };
547 #define to_usb_driver(d) container_of(d, struct usb_driver, driver)
看似很长一段,实际上也就是注释为主.而此刻我们只需注意到其中的struct device_driver
driver 这个成员,usb core 为每一个设备驱动准备了一个函数,让它把自己的这个struct
device_driver driver 插入到usb_bus_type 中的drivers 链表中去.而这个函数正是我们此
前看到的usb_register.而与之对应的usb_deregister 所从事的正是与之相反的工作,把这个
结构体从drivers 链表中删除.可以说,usb core 的确是用心良苦,为每一个usb 设备驱动做足
了