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authorAntony Pavlov <antonynpavlov@gmail.com>2014-05-22 23:48:45 +0400
committerSascha Hauer <s.hauer@pengutronix.de>2014-05-26 17:51:21 +0200
commitdaa2a00263122297df1070eb1c5d5421b001463a (patch)
tree2b34f3926918f956a4f21fc1137c85e9c606bd20 /arch/arm/mach-uemd
parentd527e9ca4156484d34d78816081c5b6856ad4091 (diff)
downloadbarebox-daa2a00263122297df1070eb1c5d5421b001463a.tar.gz
ARM: uemd: add DEBUG_LL support
Signed-off-by: Antony Pavlov <antonynpavlov@gmail.com> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Diffstat (limited to 'arch/arm/mach-uemd')
-rw-r--r--arch/arm/mach-uemd/include/mach/debug_ll.h42
1 files changed, 42 insertions, 0 deletions
diff --git a/arch/arm/mach-uemd/include/mach/debug_ll.h b/arch/arm/mach-uemd/include/mach/debug_ll.h
new file mode 100644
index 0000000..ce18244
--- /dev/null
+++ b/arch/arm/mach-uemd/include/mach/debug_ll.h
@@ -0,0 +1,42 @@
+/*
+ * Copyright (C) 2014 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.
+ *
+ */
+
+/** @file
+ * This File contains declaration for early output support
+ */
+#ifndef __INCLUDE_ARCH_DEBUG_LL_H__
+#define __INCLUDE_ARCH_DEBUG_LL_H__
+
+#include <asm/io.h>
+#include <mach/hardware.h>
+
+#define DEBUG_LL_UART_ADDR UEMD_UART0_BASE
+#define DEBUG_LL_UART_RSHFT 2
+
+#define rbr (0 << DEBUG_LL_UART_RSHFT)
+#define lsr (5 << DEBUG_LL_UART_RSHFT)
+#define LSR_THRE 0x20 /* Xmit holding register empty */
+
+static inline void PUTC_LL(char ch)
+{
+ while (!(__raw_readb(DEBUG_LL_UART_ADDR + lsr) & LSR_THRE))
+ ;
+
+ __raw_writeb(ch, DEBUG_LL_UART_ADDR + rbr);
+}
+
+#endif /* __INCLUDE_ARCH_DEBUG_LL_H__ */