69 	struct usb_lcd *dev = to_lcd_dev(kref);  in lcd_delete()  local
71 	usb_put_dev(dev->udev);  in lcd_delete()
72 	kfree(dev->bulk_in_buffer);  in lcd_delete()
73 	kfree(dev);  in lcd_delete()
79 	struct usb_lcd *dev;  in lcd_open()  local
92 	dev = usb_get_intfdata(interface);  in lcd_open()
95 	kref_get(&dev->kref);  in lcd_open()
100 		kref_put(&dev->kref, lcd_delete);  in lcd_open()
105 	file->private_data = dev;  in lcd_open()
112 	struct usb_lcd *dev;  in lcd_release()  local
114 	dev = file->private_data;  in lcd_release()
115 	if (dev == NULL)  in lcd_release()
119 	usb_autopm_put_interface(dev->interface);  in lcd_release()
120 	kref_put(&dev->kref, lcd_delete);  in lcd_release()
127 	struct usb_lcd *dev;  in lcd_read()  local
131 	dev = file->private_data;  in lcd_read()
133 	down_read(&dev->io_rwsem);  in lcd_read()
135 	if (dev->disconnected) {  in lcd_read()
141 	retval = usb_bulk_msg(dev->udev,  in lcd_read()
142 			      usb_rcvbulkpipe(dev->udev,  in lcd_read()
143 					      dev->bulk_in_endpointAddr),  in lcd_read()
144 			      dev->bulk_in_buffer,  in lcd_read()
145 			      min(dev->bulk_in_size, count),  in lcd_read()
150 		if (copy_to_user(buffer, dev->bulk_in_buffer, bytes_read))  in lcd_read()
157 	up_read(&dev->io_rwsem);  in lcd_read()
164 	struct usb_lcd *dev;  in lcd_ioctl()  local
168 	dev = file->private_data;  in lcd_ioctl()
169 	if (dev == NULL)  in lcd_ioctl()
174 		bcdDevice = le16_to_cpu((dev->udev)->descriptor.bcdDevice);  in lcd_ioctl()
197 	struct usb_lcd *dev;  in lcd_write_bulk_callback()  local
200 	dev = urb->context;  in lcd_write_bulk_callback()
207 		dev_dbg(&dev->interface->dev,  in lcd_write_bulk_callback()
212 	usb_free_coherent(urb->dev, urb->transfer_buffer_length,  in lcd_write_bulk_callback()
214 	up(&dev->limit_sem);  in lcd_write_bulk_callback()
220 	struct usb_lcd *dev;  in lcd_write()  local
225 	dev = file->private_data;  in lcd_write()
231 	r = down_interruptible(&dev->limit_sem);  in lcd_write()
235 	down_read(&dev->io_rwsem);  in lcd_write()
237 	if (dev->disconnected) {  in lcd_write()
249 	buf = usb_alloc_coherent(dev->udev, count, GFP_KERNEL,  in lcd_write()
262 	usb_fill_bulk_urb(urb, dev->udev,  in lcd_write()
263 			  usb_sndbulkpipe(dev->udev,  in lcd_write()
264 			  dev->bulk_out_endpointAddr),  in lcd_write()
265 			  buf, count, lcd_write_bulk_callback, dev);  in lcd_write()
268 	usb_anchor_urb(urb, &dev->submitted);  in lcd_write()
273 		dev_err(&dev->udev->dev,  in lcd_write()
283 	up_read(&dev->io_rwsem);  in lcd_write()
289 	usb_free_coherent(dev->udev, count, buf, urb->transfer_dma);  in lcd_write()
292 	up_read(&dev->io_rwsem);  in lcd_write()
293 	up(&dev->limit_sem);  in lcd_write()
320 	struct usb_lcd *dev = NULL;  in lcd_probe()  local
326 	dev = kzalloc(sizeof(*dev), GFP_KERNEL);  in lcd_probe()
327 	if (!dev)  in lcd_probe()
330 	kref_init(&dev->kref);  in lcd_probe()
331 	sema_init(&dev->limit_sem, USB_LCD_CONCURRENT_WRITES);  in lcd_probe()
332 	init_rwsem(&dev->io_rwsem);  in lcd_probe()
333 	init_usb_anchor(&dev->submitted);  in lcd_probe()
335 	dev->udev = usb_get_dev(interface_to_usbdev(interface));  in lcd_probe()
336 	dev->interface = interface;  in lcd_probe()
338 	if (le16_to_cpu(dev->udev->descriptor.idProduct) != 0x0001) {  in lcd_probe()
339 		dev_warn(&interface->dev, "USBLCD model not supported.\n");  in lcd_probe()
349 		dev_err(&interface->dev,  in lcd_probe()
354 	dev->bulk_in_size = usb_endpoint_maxp(bulk_in);  in lcd_probe()
355 	dev->bulk_in_endpointAddr = bulk_in->bEndpointAddress;  in lcd_probe()
356 	dev->bulk_in_buffer = kmalloc(dev->bulk_in_size, GFP_KERNEL);  in lcd_probe()
357 	if (!dev->bulk_in_buffer) {  in lcd_probe()
362 	dev->bulk_out_endpointAddr = bulk_out->bEndpointAddress;  in lcd_probe()
365 	usb_set_intfdata(interface, dev);  in lcd_probe()
371 		dev_err(&interface->dev,  in lcd_probe()
376 	i = le16_to_cpu(dev->udev->descriptor.bcdDevice);  in lcd_probe()
378 	dev_info(&interface->dev, "USBLCD Version %1d%1d.%1d%1d found "  in lcd_probe()
380 		 (i & 0xF0)>>4, (i & 0xF), dev->udev->devnum);  in lcd_probe()
383 	dev_info(&interface->dev, "USB LCD device now attached to USBLCD-%d\n",  in lcd_probe()
388 	kref_put(&dev->kref, lcd_delete);  in lcd_probe()
392 static void lcd_draw_down(struct usb_lcd *dev)  in lcd_draw_down()  argument
396 	time = usb_wait_anchor_empty_timeout(&dev->submitted, 1000);  in lcd_draw_down()
398 		usb_kill_anchored_urbs(&dev->submitted);  in lcd_draw_down()
403 	struct usb_lcd *dev = usb_get_intfdata(intf);  in lcd_suspend()  local
405 	if (!dev)  in lcd_suspend()
407 	lcd_draw_down(dev);  in lcd_suspend()
418 	struct usb_lcd *dev = usb_get_intfdata(interface);  in lcd_disconnect()  local
424 	down_write(&dev->io_rwsem);  in lcd_disconnect()
425 	dev->disconnected = 1;  in lcd_disconnect()
426 	up_write(&dev->io_rwsem);  in lcd_disconnect()
428 	usb_kill_anchored_urbs(&dev->submitted);  in lcd_disconnect()
431 	kref_put(&dev->kref, lcd_delete);  in lcd_disconnect()
433 	dev_info(&interface->dev, "USB LCD #%d now disconnected\n", minor);  in lcd_disconnect()