--- linux-2.6.28/drivers/usb/serial/ftdi_sio.c
+++ linux-2.6.28/drivers/usb/serial/ftdi_sio.c
@@ -672,6 +672,10 @@
 	{ USB_DEVICE(WBE_VID, WBE_SMARTMOUSE_PID2) },
 	{ USB_DEVICE(WBE_VID, WBE_SMARTMOUSE_PID3) },
 	{ USB_DEVICE(WBE_VID, WBE_SMARTMOUSE_PID4) },
+	{ USB_DEVICE(QUAD_VID, QUADMOUSE_PID1) },
+	{ USB_DEVICE(QUAD_VID, QUADMOUSE_PID2) },
+	{ USB_DEVICE(QUAD_VID, QUADMOUSE_PID3) },
+	{ USB_DEVICE(QUAD_VID, QUADMOUSE_PID4) },
 	{ USB_DEVICE(FTDI_VID, FTDI_8U232AM_PID1) },
 	{ USB_DEVICE(FTDI_VID, FTDI_8U232AM_PID2) },
 	{ USB_DEVICE(FTDI_VID, FTDI_8U232AM_PID3) },
--- linux-2.6.28/drivers/usb/serial/ftdi_sio.h
+++ linux-2.6.28/drivers/usb/serial/ftdi_sio.h
@@ -97,6 +97,11 @@
 #define WBE_SMARTMOUSE_PID2   0x0002  /* Smartmouse USB */
 #define WBE_SMARTMOUSE_PID3   0x0003  /* Smartmouse USB */
 #define WBE_SMARTMOUSE_PID4   0x0004  /* Smartmouse USB */
+#define QUAD_VID                      0x0403
+#define QUADMOUSE_PID1   0x0001  /* Quadmouse USB */
+#define QUADMOUSE_PID2   0x0002  /* Quadmouse USB */
+#define QUADMOUSE_PID3   0x0003  /* Quadmouse USB */
+#define QUADMOUSE_PID4   0x0004  /* Quadmouse USB */
 #define FTDI_8U232AM_PID1 0x6001 /* FTDI USB2Serial */
 #define FTDI_8U232AM_PID2 0x6002 /* FTDI USB2Serial */
 #define FTDI_8U232AM_PID3 0x6003 /* FTDI USB2Serial */
@@ -1097,6 +1100,11 @@
  */
 
 
+/* Interface indicies for FT2232, FT2232H and FT4232H devices*/
+#define INTERFACE_A		1
+#define INTERFACE_B		2
+#define INTERFACE_C		3
+#define INTERFACE_D		4
 
 /* FTDI_SIO_MODEM_CTRL */
 #define FTDI_SIO_SET_MODEM_CTRL_REQUEST_TYPE 0x40