From: Antony Pavlov <antonynpavlov@gmail.com>
To: barebox@lists.infradead.org
Subject: [PATCH 1/2] MIPS: add common header file for DEBUG_LL via NS16550
Date: Sat, 12 May 2012 11:15:03 +0400 [thread overview]
Message-ID: <1336806904-6251-1-git-send-email-antonynpavlov@gmail.com> (raw)
Signed-off-by: Antony Pavlov <antonynpavlov@gmail.com>
---
arch/mips/include/debug_ll_ns16550.h | 40 ++++++++++++++++++++++++++++++++++
1 file changed, 40 insertions(+)
create mode 100644 arch/mips/include/debug_ll_ns16550.h
diff --git a/arch/mips/include/debug_ll_ns16550.h b/arch/mips/include/debug_ll_ns16550.h
new file mode 100644
index 0000000..9280219
--- /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__ */
--
1.7.10
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next reply other threads:[~2012-05-12 7:15 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-05-12 7:15 Antony Pavlov [this message]
2012-05-12 7:15 ` [PATCH 2/2] MIPS: malta: use common DEBUG_LL code for NS16550 Antony Pavlov
2012-05-13 9:02 ` [PATCH 1/2] MIPS: add common header file for DEBUG_LL via NS16550 Sascha Hauer
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