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| author | Antony Pavlov <antonynpavlov@gmail.com> | 2014-05-22 23:48:45 +0400 |
|---|---|---|
| committer | Sascha Hauer <s.hauer@pengutronix.de> | 2014-05-26 17:51:21 +0200 |
| commit | daa2a00263122297df1070eb1c5d5421b001463a (patch) | |
| tree | 2b34f3926918f956a4f21fc1137c85e9c606bd20 /arch | |
| parent | d527e9ca4156484d34d78816081c5b6856ad4091 (diff) | |
| download | barebox-daa2a00263122297df1070eb1c5d5421b001463a.tar.gz barebox-daa2a00263122297df1070eb1c5d5421b001463a.tar.xz | |
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')
| -rw-r--r-- | arch/arm/Kconfig | 1 | ||||
| -rw-r--r-- | arch/arm/mach-uemd/include/mach/debug_ll.h | 42 |
2 files changed, 43 insertions, 0 deletions
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig index ca13174c73..c045ef317e 100644 --- a/arch/arm/Kconfig +++ b/arch/arm/Kconfig @@ -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" 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 0000000000..ce182446b0 --- /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__ */ |