--- linux-2.2.16-usb/./drivers/usb/serial/usb-serial.h	Mon May  7 01:26:48 2001
+++ linux-2.2.16-usb-james/./drivers/usb/serial/usb-serial.h	Fri Oct 27 04:41:25 2000
@@ -49,6 +49,13 @@
 	int			bulk_out_size;
 	struct urb *		write_urb;
 
+        spinlock_t 		lock;
+        unsigned char           *xmit_buf;
+        int                     xmit_head;
+        int                     xmit_tail;
+        int                     xmit_cnt;
+
+
 	wait_queue_head_t	write_wait;
 
 	void *			private;	/* data private to the specific port */
@@ -117,6 +124,7 @@
 
 
 extern struct usb_serial_device_type handspring_device;
+extern struct usb_serial_device_type pl2303_device;
 extern struct usb_serial_device_type whiteheat_fake_device;
 extern struct usb_serial_device_type whiteheat_device;
 extern struct usb_serial_device_type ftdi_sio_device;
--- linux-2.2.16-usb/./drivers/usb/serial/usbserial.c	Mon May  7 01:26:48 2001
+++ linux-2.2.16-usb-james/./drivers/usb/serial/usbserial.c	Mon Oct 30 00:36:23 2000
@@ -226,6 +226,9 @@
 #else
 	#undef DEBUG
 #endif
+
+#undef DEBUG
+
 #include <linux/usb.h>
 
 /* Module information */
@@ -234,6 +237,8 @@
 
 #include "usb-serial.h"
 
+#include "pl2303.h"
+
 #define MAX(a,b)	(((a)>(b))?(a):(b))
 
 /* function prototypes for a "generic" type serial converter (no flow control, not all endpoints needed) */
@@ -284,6 +289,9 @@
 	&whiteheat_fake_device,
 	&whiteheat_device,
 #endif
+#ifdef CONFIG_USB_SERIAL_PL2303
+	&pl2303_device,
+#endif
 #ifdef CONFIG_USB_SERIAL_VISOR
 	&handspring_device,
 #endif
@@ -841,6 +849,8 @@
 	}
 
 #ifdef DEBUG
+#endif
+#if 1
 	if (urb->actual_length) {
 		printk (KERN_DEBUG __FILE__ ": data read - length = %d, data = ", urb->actual_length);
 		for (i = 0; i < urb->actual_length; ++i) {
@@ -968,7 +978,30 @@
 			interrupt_in_endpoint[num_interrupt_in] = endpoint;
 			++num_interrupt_in;
 		}
+	}			
+
+/* BEGIN HORRIBLE HACK FOR PL2303*/
+
+	if ((dev->descriptor.idVendor == PL2303_VENDOR_ID) &&
+		    (dev->descriptor.idProduct == PL2303_PRODUCT_ID) && (ifnum==1)) {
+
+	/* check out the endpoints of the other interface*/
+	interface = &dev->actconfig->interface[ifnum ^ 1].altsetting[0];
+	for (i = 0; i < interface->bNumEndpoints; ++i) {
+		endpoint = &interface->endpoint[i];
+		
+		if ((endpoint->bEndpointAddress & 0x80) &&
+		    ((endpoint->bmAttributes & 3) == 0x03)) {
+			/* we found a interrupt in endpoint */
+			dbg("found interrupt in");
+			interrupt_pipe = HAS;
+			interrupt_in_endpoint[num_interrupt_in] = endpoint;
+			++num_interrupt_in;
+		}
 	}
+	}
+
+/*END HORRIBLE HACK FOR PL2303 */
 	
 	/* verify that we found all of the endpoints that we need */
 	if (!((interrupt_pipe & type->needs_interrupt_in) &&