usb/misc/chaoskey.c

9  * The driver connects to the kernel hardware RNG interface to provide
75 	struct usb_interface *interface;
97 		usb_dbg(dev->interface, "free");
101 		usb_put_intf(dev->interface);
106 static int chaoskey_probe(struct usb_interface *interface,
109 	struct usb_device *udev = interface_to_usbdev(interface);
110 	struct usb_host_interface *altsetting = interface->cur_altsetting;
118 	usb_dbg(interface, "probe %s-%s", udev->product, udev->serial);
123 		usb_dbg(interface, "no IN endpoint found");
132 		usb_dbg(interface, "invalid size (%d)", size);
137 		usb_dbg(interface, "size reduced from %d to %d\n",
149 	dev->interface = usb_get_intf(interface);
193 	usb_set_intfdata(interface, dev);
195 	result = usb_register_dev(interface, &chaoskey_class);
197 		usb_err(interface, "Unable to allocate minor number.");
206 		usb_err(interface, "Unable to register with hwrng");
210 	usb_dbg(interface, "chaoskey probe success, size %d", dev->size);
214 	usb_set_intfdata(interface, NULL);
219 static void chaoskey_disconnect(struct usb_interface *interface)
223 	usb_dbg(interface, "disconnect");
224 	dev = usb_get_intfdata(interface);
226 		usb_dbg(interface, "disconnect failed - no dev");
233 	usb_deregister_dev(interface, &chaoskey_class);
235 	usb_set_intfdata(interface, NULL);
247 	usb_dbg(interface, "disconnect done");
253 	struct usb_interface *interface;
255 	/* get the interface from minor number and driver information */
256 	interface = usb_find_interface(&chaoskey_driver, iminor(inode));
257 	if (!interface)
260 	usb_dbg(interface, "open");
262 	dev = usb_get_intfdata(interface);
264 		usb_dbg(interface, "open (dev)");
273 	usb_dbg(interface, "open success");
280 	struct usb_interface *interface;
285 	interface = dev->interface;
287 	usb_dbg(interface, "release");
291 	usb_dbg(interface, "open count at release is %d", dev->open);
294 		usb_dbg(interface, "invalid open count (%d)", dev->open);
310 	usb_dbg(interface, "release success");
319 	usb_dbg(dev->interface, "callback status (%d)", status);
343 	usb_dbg(dev->interface, "fill");
348 		usb_dbg(dev->interface, "not empty yet (valid %d used %d)",
355 		usb_dbg(dev->interface, "device not present");
360 	result = usb_autopm_get_interface(dev->interface);
362 		usb_dbg(dev->interface, "wakeup failed (result %d)", result);
399 	usb_autopm_put_interface(dev->interface);
401 	usb_dbg(dev->interface, "read %d bytes", dev->valid);
422 	usb_dbg(dev->interface, "read %zu", count);
426 		/* Grab the rng_lock briefly to ensure that the hwrng interface
469 		usb_dbg(dev->interface, "read %zu bytes", read_count);
472 	usb_dbg(dev->interface, "empty read, result %d", result);
484 	usb_dbg(dev->interface, "rng_read max %zu wait %d", max, wait);
487 		usb_dbg(dev->interface, "device not present");
518 	usb_dbg(dev->interface, "rng_read this_time %d\n", this_time);
523 static int chaoskey_suspend(struct usb_interface *interface,
526 	usb_dbg(interface, "suspend");
530 static int chaoskey_resume(struct usb_interface *interface)
533 	struct usb_device *udev = interface_to_usbdev(interface);
535 	usb_dbg(interface, "resume");
536 	dev = usb_get_intfdata(interface);