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-rw-r--r--kernel/arch/mips/jz4740/serial.c33
1 files changed, 33 insertions, 0 deletions
diff --git a/kernel/arch/mips/jz4740/serial.c b/kernel/arch/mips/jz4740/serial.c
new file mode 100644
index 000000000..d23de4582
--- /dev/null
+++ b/kernel/arch/mips/jz4740/serial.c
@@ -0,0 +1,33 @@
+/*
+ * Copyright (C) 2010, Lars-Peter Clausen <lars@metafoo.de>
+ * JZ4740 serial support
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ */
+
+#include <linux/io.h>
+#include <linux/serial_core.h>
+#include <linux/serial_reg.h>
+
+void jz4740_serial_out(struct uart_port *p, int offset, int value)
+{
+ switch (offset) {
+ case UART_FCR:
+ value |= 0x10; /* Enable uart module */
+ break;
+ case UART_IER:
+ value |= (value & 0x4) << 2;
+ break;
+ default:
+ break;
+ }
+ writeb(value, p->membase + (offset << p->regshift));
+}