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authorAntony Pavlov <antonynpavlov@gmail.com>2012-05-12 11:15:03 +0400
committerSascha Hauer <s.hauer@pengutronix.de>2012-05-13 11:02:33 +0200
commit40492a0c1305835c996e15eb1cce2406473ae76d (patch)
treee172968ecb8bd54041b70fc4f238ff093b70213b /arch/mips
parentf49387add0c59737e3d0d8d48ab1fcfe6f23e00a (diff)
downloadbarebox-40492a0c1305835c996e15eb1cce2406473ae76d.tar.gz
barebox-40492a0c1305835c996e15eb1cce2406473ae76d.tar.xz
MIPS: add common header file for DEBUG_LL via NS16550
Signed-off-by: Antony Pavlov <antonynpavlov@gmail.com> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Diffstat (limited to 'arch/mips')
-rw-r--r--arch/mips/include/debug_ll_ns16550.h40
1 files changed, 40 insertions, 0 deletions
diff --git a/arch/mips/include/debug_ll_ns16550.h b/arch/mips/include/debug_ll_ns16550.h
new file mode 100644
index 0000000000..9280219449
--- /dev/null
+++ b/arch/mips/include/debug_ll_ns16550.h
@@ -0,0 +1,40 @@
+/*
+ * Copyright (C) 2012 Antony Pavlov <antonynpavlov@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_NS16550_H__
+#define __INCLUDE_ARCH_DEBUG_LL_NS16550_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_NS16550_H__ */