--- zzzz-none-000/linux-2.6.28.10/drivers/serial/serial_core.c	2009-05-02 18:54:43.000000000 +0000
+++ fusiv-7390-686/linux-2.6.28.10/drivers/serial/serial_core.c	2016-02-10 17:16:55.000000000 +0000
@@ -113,6 +113,8 @@
 static void uart_tasklet_action(unsigned long data)
 {
 	struct uart_state *state = (struct uart_state *)data;
+    /*--- printk(KERN_ERR "[%d:%s/%d] tty_wakeup %s\n", ---*/ 
+                /*--- smp_processor_id(), __FUNCTION__, __LINE__, state->info->port.tty->name); ---*/
 	tty_wakeup(state->info->port.tty);
 }
 
@@ -487,6 +489,23 @@
 	uart_start(tty);
 }
 
+unsigned int enable_avm_console;
+static int uart_avm_console(struct tty_struct *tty) {
+
+	struct uart_state *state = tty->driver_data;
+	struct uart_port *port = state->port;
+
+    if (port->cons) {
+        if (port->cons->flags & (CON_ENABLED | CON_CONSDEV)) {
+            if (enable_avm_console)
+                return 0;
+            else
+                return 1;
+        }
+    }
+    return 0;
+}
+
 static int
 uart_write(struct tty_struct *tty, const unsigned char *buf, int count)
 {
@@ -2272,12 +2291,20 @@
 	struct uart_driver *drv = driver->driver_state;
 	struct uart_state *state = drv->state + line;
 	struct uart_port *port;
+    int ch;
 
 	if (!state || !state->port)
 		return -1;
 
 	port = state->port;
-	return port->ops->poll_get_char(port);
+    ch = port->ops->poll_get_char(port);
+
+    if (port->cons->flags & (CON_ENABLED | CON_CONSDEV)) {
+        if (ch == 0xD) {
+            enable_avm_console = 1;
+        }
+    }
+	return ch;
 }
 
 static void uart_poll_put_char(struct tty_driver *driver, int line, char ch)
@@ -2324,6 +2351,7 @@
 	.poll_get_char	= uart_poll_get_char,
 	.poll_put_char	= uart_poll_put_char,
 #endif
+    .is_avm_console    = uart_avm_console,
 };
 
 /**