39 	dev_dbg(&(usb_if)->dev, format, ## arg)
42 	dev_err(&(usb_if)->dev, format, ## arg)
94 static void chaoskey_free(struct chaoskey *dev)  in chaoskey_free()  argument
96 	usb_dbg(dev->interface, "free");  in chaoskey_free()
97 	kfree(dev->name);  in chaoskey_free()
98 	kfree(dev->buf);  in chaoskey_free()
99 	kfree(dev);  in chaoskey_free()
109 	struct chaoskey *dev;  in chaoskey_probe()  local
142 	dev = kzalloc(sizeof(struct chaoskey), GFP_KERNEL);  in chaoskey_probe()
144 	if (dev == NULL)  in chaoskey_probe()
147 	dev->buf = kmalloc(size, GFP_KERNEL);  in chaoskey_probe()
149 	if (dev->buf == NULL) {  in chaoskey_probe()
150 		kfree(dev);  in chaoskey_probe()
159 		dev->name = kmalloc(strlen(udev->product) + 1 +  in chaoskey_probe()
161 		if (dev->name == NULL) {  in chaoskey_probe()
162 			kfree(dev->buf);  in chaoskey_probe()
163 			kfree(dev);  in chaoskey_probe()
167 		strcpy(dev->name, udev->product);  in chaoskey_probe()
168 		strcat(dev->name, "-");  in chaoskey_probe()
169 		strcat(dev->name, udev->serial);  in chaoskey_probe()
172 	dev->interface = interface;  in chaoskey_probe()
174 	dev->in_ep = in_ep;  in chaoskey_probe()
176 	dev->size = size;  in chaoskey_probe()
177 	dev->present = 1;  in chaoskey_probe()
179 	init_waitqueue_head(&dev->wait_q);  in chaoskey_probe()
181 	mutex_init(&dev->lock);  in chaoskey_probe()
182 	mutex_init(&dev->rng_lock);  in chaoskey_probe()
184 	usb_set_intfdata(interface, dev);  in chaoskey_probe()
190 		chaoskey_free(dev);  in chaoskey_probe()
194 	dev->hwrng.name = dev->name ? dev->name : chaoskey_driver.name;  in chaoskey_probe()
195 	dev->hwrng.read = chaoskey_rng_read;  in chaoskey_probe()
208 	dev->hwrng.quality = 1024 + 1023;  in chaoskey_probe()
210 	dev->hwrng_registered = (hwrng_register(&dev->hwrng) == 0);  in chaoskey_probe()
211 	if (!dev->hwrng_registered)  in chaoskey_probe()
216 	usb_dbg(interface, "chaoskey probe success, size %d", dev->size);  in chaoskey_probe()
222 	struct chaoskey	*dev;  in chaoskey_disconnect()  local
225 	dev = usb_get_intfdata(interface);  in chaoskey_disconnect()
226 	if (!dev) {  in chaoskey_disconnect()
231 	if (dev->hwrng_registered)  in chaoskey_disconnect()
232 		hwrng_unregister(&dev->hwrng);  in chaoskey_disconnect()
237 	mutex_lock(&dev->lock);  in chaoskey_disconnect()
239 	dev->present = 0;  in chaoskey_disconnect()
241 	if (!dev->open) {  in chaoskey_disconnect()
242 		mutex_unlock(&dev->lock);  in chaoskey_disconnect()
243 		chaoskey_free(dev);  in chaoskey_disconnect()
245 		mutex_unlock(&dev->lock);  in chaoskey_disconnect()
252 	struct chaoskey *dev;  in chaoskey_open()  local
262 	dev = usb_get_intfdata(interface);  in chaoskey_open()
263 	if (!dev) {  in chaoskey_open()
268 	file->private_data = dev;  in chaoskey_open()
269 	mutex_lock(&dev->lock);  in chaoskey_open()
270 	++dev->open;  in chaoskey_open()
271 	mutex_unlock(&dev->lock);  in chaoskey_open()
279 	struct chaoskey *dev = file->private_data;  in chaoskey_release()  local
282 	if (dev == NULL)  in chaoskey_release()
285 	interface = dev->interface;  in chaoskey_release()
289 	mutex_lock(&dev->lock);  in chaoskey_release()
291 	usb_dbg(interface, "open count at release is %d", dev->open);  in chaoskey_release()
293 	if (dev->open <= 0) {  in chaoskey_release()
294 		usb_dbg(interface, "invalid open count (%d)", dev->open);  in chaoskey_release()
295 		mutex_unlock(&dev->lock);  in chaoskey_release()
299 	--dev->open;  in chaoskey_release()
301 	if (!dev->present) {  in chaoskey_release()
302 		if (dev->open == 0) {  in chaoskey_release()
303 			mutex_unlock(&dev->lock);  in chaoskey_release()
304 			chaoskey_free(dev);  in chaoskey_release()
306 			mutex_unlock(&dev->lock);  in chaoskey_release()
308 		mutex_unlock(&dev->lock);  in chaoskey_release()
316 static int _chaoskey_fill(struct chaoskey *dev)  in _chaoskey_fill()  argument
321 	struct usb_device *udev = interface_to_usbdev(dev->interface);  in _chaoskey_fill()
323 	usb_dbg(dev->interface, "fill");  in _chaoskey_fill()
327 	if (dev->valid != dev->used) {  in _chaoskey_fill()
328 		usb_dbg(dev->interface, "not empty yet (valid %d used %d)",  in _chaoskey_fill()
329 			dev->valid, dev->used);  in _chaoskey_fill()
334 	if (!dev->present) {  in _chaoskey_fill()
335 		usb_dbg(dev->interface, "device not present");  in _chaoskey_fill()
340 	result = usb_autopm_get_interface(dev->interface);  in _chaoskey_fill()
342 		usb_dbg(dev->interface, "wakeup failed (result %d)", result);  in _chaoskey_fill()
347 			      usb_rcvbulkpipe(udev, dev->in_ep),  in _chaoskey_fill()
348 			      dev->buf, dev->size, &this_read,  in _chaoskey_fill()
352 	usb_autopm_put_interface(dev->interface);  in _chaoskey_fill()
355 		dev->valid = this_read;  in _chaoskey_fill()
356 		dev->used = 0;  in _chaoskey_fill()
359 	usb_dbg(dev->interface, "bulk_msg result %d this_read %d",  in _chaoskey_fill()
370 	struct chaoskey *dev;  in chaoskey_read()  local
376 	dev = file->private_data;  in chaoskey_read()
378 	if (dev == NULL || !dev->present)  in chaoskey_read()
381 	usb_dbg(dev->interface, "read %zu", count);  in chaoskey_read()
388 		result = mutex_lock_interruptible(&dev->rng_lock);  in chaoskey_read()
391 		mutex_unlock(&dev->rng_lock);  in chaoskey_read()
393 		result = mutex_lock_interruptible(&dev->lock);  in chaoskey_read()
396 		if (dev->valid == dev->used) {  in chaoskey_read()
397 			result = _chaoskey_fill(dev);  in chaoskey_read()
399 				mutex_unlock(&dev->lock);  in chaoskey_read()
404 			if (dev->used == dev->valid) {  in chaoskey_read()
405 				mutex_unlock(&dev->lock);  in chaoskey_read()
410 		this_time = dev->valid - dev->used;  in chaoskey_read()
414 		remain = copy_to_user(buffer, dev->buf + dev->used, this_time);  in chaoskey_read()
421 			dev->used += this_time - remain;  in chaoskey_read()
422 			mutex_unlock(&dev->lock);  in chaoskey_read()
429 		dev->used += this_time;  in chaoskey_read()
430 		mutex_unlock(&dev->lock);  in chaoskey_read()
434 		usb_dbg(dev->interface, "read %zu bytes", read_count);  in chaoskey_read()
437 	usb_dbg(dev->interface, "empty read, result %d", result);  in chaoskey_read()
444 	struct chaoskey *dev = container_of(rng, struct chaoskey, hwrng);  in chaoskey_rng_read()  local
447 	usb_dbg(dev->interface, "rng_read max %zu wait %d", max, wait);  in chaoskey_rng_read()
449 	if (!dev->present) {  in chaoskey_rng_read()
450 		usb_dbg(dev->interface, "device not present");  in chaoskey_rng_read()
458 	mutex_lock(&dev->rng_lock);  in chaoskey_rng_read()
460 	mutex_lock(&dev->lock);  in chaoskey_rng_read()
462 	mutex_unlock(&dev->rng_lock);  in chaoskey_rng_read()
468 	if (dev->valid == dev->used)  in chaoskey_rng_read()
469 		(void) _chaoskey_fill(dev);  in chaoskey_rng_read()
471 	this_time = dev->valid - dev->used;  in chaoskey_rng_read()
475 	memcpy(data, dev->buf + dev->used, this_time);  in chaoskey_rng_read()
477 	dev->used += this_time;  in chaoskey_rng_read()
479 	mutex_unlock(&dev->lock);  in chaoskey_rng_read()
481 	usb_dbg(dev->interface, "rng_read this_time %d\n", this_time);  in chaoskey_rng_read()