+static void qt_status_change_check(struct tty_struct *tty,
+ struct urb *urb,
+ struct quatech_port *qt_port,
+ struct usb_serial_port *port)
+{
+ int flag, i;
+ unsigned char *data = urb->transfer_buffer;
+ unsigned int RxCount = urb->actual_length;
+
+ for (i = 0; i < RxCount; ++i) {
+ /* Look ahead code here */
+ if ((i <= (RxCount - 3)) && (data[i] == 0x1b)
+ && (data[i + 1] == 0x1b)) {
+ flag = 0;
+ switch (data[i + 2]) {
+ case 0x00:
+ if (i > (RxCount - 4)) {
+ dev_dbg(&port->dev,
+ "Illegal escape seuences in received data\n");
+ break;
+ }
+
+ ProcessLineStatus(qt_port, data[i + 3]);
+
+ i += 3;
+ flag = 1;
+ break;
+
+ case 0x01:
+ if (i > (RxCount - 4)) {
+ dev_dbg(&port->dev,
+ "Illegal escape seuences in received data\n");
+ break;
+ }
+
+ ProcessModemStatus(qt_port, data[i + 3]);
+
+ i += 3;
+ flag = 1;
+ break;
+
+ case 0xff:
+ dev_dbg(&port->dev, "No status sequence.\n");
+
+ ProcessRxChar(tty, port, data[i]);
+ ProcessRxChar(tty, port, data[i + 1]);
+
+ i += 2;
+ break;
+ }
+ if (flag == 1)
+ continue;
+ }
+
+ if (tty && urb->actual_length)
+ tty_insert_flip_char(tty, data[i], TTY_NORMAL);
+
+ }
+ tty_flip_buffer_push(tty);
+}
+