2 files changed, 27 insertions, 0 deletions
diff --git a/sys/dev/uart/uart_cpu.h b/sys/dev/uart/uart_cpu.h
index db64d49..99ced1a 100644
--- a/sys/dev/uart/uart_cpu.h
+++ b/sys/dev/uart/uart_cpu.h
@@ -43,6 +43,8 @@ struct uart_ops {
 	void (*putc)(struct uart_bas *, int);
 	int (*rxready)(struct uart_bas *);
 	int (*getc)(struct uart_bas *, struct mtx *);
+	void (*grab)(struct uart_bas *);
+	void (*ungrab)(struct uart_bas *);
 };
 
 extern bus_space_tag_t uart_bus_space_io;
@@ -135,6 +137,27 @@ uart_putc(struct uart_devinfo *di, int c)
 	uart_unlock(di->hwmtx);
 }
 
+static __inline void
+uart_grab(struct uart_devinfo *di)
+{
+
+	uart_lock(di->hwmtx);
+	if (di->ops->grab)
+		di->ops->grab(&di->bas);
+	uart_unlock(di->hwmtx);
+}
+
+static __inline void
+uart_ungrab(struct uart_devinfo *di)
+{
+
+	uart_lock(di->hwmtx);
+	if (di->ops->ungrab)
+		di->ops->ungrab(&di->bas);
+	uart_unlock(di->hwmtx);
+}
+
+
 static __inline int
 uart_rxready(struct uart_devinfo *di)
 {
diff --git a/sys/dev/uart/uart_tty.c b/sys/dev/uart/uart_tty.c
index 97ee08d..56f879b 100644
--- a/sys/dev/uart/uart_tty.c
+++ b/sys/dev/uart/uart_tty.c
@@ -112,11 +112,15 @@ uart_cnterm(struct consdev *cp)
 static void
 uart_cngrab(struct consdev *cp)
 {
+
+	uart_grab(cp->cn_arg);
 }
 
 static void
 uart_cnungrab(struct consdev *cp)
 {
+
+	uart_ungrab(cp->cn_arg);
 }
 
 static void