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ARM: uemd: add DEBUG_LL support 

Signed-off-by: Antony Pavlov <antonynpavlov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
This commit is contained in:
Antony Pavlov 2014-05-22 23:48:45 +04:00 committed by Sascha Hauer
parent d527e9ca41
commit daa2a00263
2 changed files with 43 additions and 0 deletions
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1
arch/arm/Kconfig
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@ -202,6 +202,7 @@ config ARCH_UEMD
select OFDEVICE
select OFTREE
select CLOCKSOURCE_UEMD
select HAS_DEBUG_LL
config ARCH_ZYNQ
bool "Xilinx Zynq-based boards"

42
arch/arm/mach-uemd/include/mach/debug_ll.h Normal file
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@ -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__ */