[RFC 1/5] MIPS: add common header file for DEBUG_LL via NS16550

[Antony Pavlov]

Signed-off-by: Antony Pavlov <antonynpavlov at gmail.com>
---
 arch/mips/include/debug_ll_common.h |   40 +++++++++++++++++++++++++++++++++++
 1 file changed, 40 insertions(+)
 create mode 100644 arch/mips/include/debug_ll_common.h

diff --git a/arch/mips/include/debug_ll_common.h b/arch/mips/include/debug_ll_common.h
new file mode 100644
index 0000000..7c26f54
--- /dev/null
+++ b/arch/mips/include/debug_ll_common.h
@@ -0,0 +1,40 @@
+/*
+ * Copyright (C) 2012 Antony Pavlov <antonynpavlov at gmail.com>
+ *
+ * This file is part of barebox.
+ * See file CREDITS for list of people who contributed to this project.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2
+ * as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+/** @file
+ *  This file contains declaration for early output support
+ */
+#ifndef __INCLUDE_ARCH_DEBUG_LL_COMMON_H__
+#define __INCLUDE_ARCH_DEBUG_LL_COMMON_H__
+
+#include <asm/io.h>
+
+#define rbr		(0 << DEBUG_LL_UART_SHIFT)
+#define lsr		(5 << DEBUG_LL_UART_SHIFT)
+
+#define LSR_THRE	0x20	/* Xmit holding register empty */
+
+static __inline__ void putc(char ch)
+{
+	while (!(__raw_readb((u8 *)DEBUG_LL_UART_ADDR + lsr) & LSR_THRE));
+	__raw_writeb(ch, (u8 *)DEBUG_LL_UART_ADDR + rbr);
+}
+
+#endif  /* __INCLUDE_ARCH_DEBUG_LL_COMMON_H__ */
-- 
1.7.10