1 files changed, 46 insertions, 0 deletions

diff --git a/arch/mips/mti-sead3/sead3-console.c b/arch/mips/mti-sead3/sead3-console.c
new file mode 100644
index 000000000000..b36739108a0f
--- /dev/null
+++ b/arch/mips/mti-sead3/sead3-console.c
@@ -0,0 +1,46 @@
+/*
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2012 MIPS Technologies, Inc.  All rights reserved.
+ */
+#include <linux/init.h>
+#include <linux/console.h>
+#include <linux/serial_reg.h>
+#include <linux/io.h>
+
+#define SEAD_UART1_REGS_BASE    0xbf000800   /* ttyS1 = DB9 port */
+#define SEAD_UART0_REGS_BASE    0xbf000900   /* ttyS0 = USB port   */
+#define PORT(base_addr, offset) ((unsigned int __iomem *)(base_addr+(offset)*4))
+
+static char console_port = 1;
+
+static inline unsigned int serial_in(int offset, unsigned int base_addr)
+{
+        return __raw_readl(PORT(base_addr, offset)) & 0xff;
+}
+
+static inline void serial_out(int offset, int value, unsigned int base_addr)
+{
+        __raw_writel(value, PORT(base_addr, offset));
+}
+
+void __init prom_init_early_console(char port)
+{
+        console_port = port;
+}
+
+int prom_putchar(char c)
+{
+        unsigned int base_addr;
+
+        base_addr = console_port ? SEAD_UART1_REGS_BASE : SEAD_UART0_REGS_BASE;
+
+        while ((serial_in(UART_LSR, base_addr) & UART_LSR_THRE) == 0)
+                ;
+
+        serial_out(UART_TX, c, base_addr);
+
+        return 1;
+}