+/* sensor commands */
+#define FTIP_RESET 0x20
+#define FTIP_ACQUIRE 0x21
+#define FTIP_RELEASE 0x22
+#define FTIP_BLINK 0x23 /* LSB of value = blink pulse width */
+#define FTIP_SCROLL 0x24
+
+#define ftip_command(dev, command, value, index) \
+ usb_control_msg (dev->udev, usb_sndctrlpipe (dev->udev, 0), command, \
+ USB_TYPE_VENDOR | USB_RECIP_ENDPOINT | USB_DIR_OUT, value, index, NULL, 0, 1000)
+