MIPS: Add core files for MIPS SEAD-3 development platform.

More information about the SEAD-3 platform can be found at
<http://www.mips.com/products/development-kits/mips-sead-3/>
on MTI's site. Currently, the M14K family of cores is what
the SEAD-3 is utilised with.

Signed-off-by: Douglas Leung <douglas@mips.com>
Signed-off-by: Chris Dearman <chris@mips.com>
Signed-off-by: Steven J. Hill <sjhill@mips.com>

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;
+}