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Diffstat (limited to 'include/mach/tegra/debug_ll.h')
| -rw-r--r-- | include/mach/tegra/debug_ll.h | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/include/mach/tegra/debug_ll.h b/include/mach/tegra/debug_ll.h new file mode 100644 index 0000000000..f8d0d13e2c --- /dev/null +++ b/include/mach/tegra/debug_ll.h @@ -0,0 +1,41 @@ +/* + * Copyright (C) 2011 Antony Pavlov <antonynpavlov@gmail.com> + * + * This file is part of barebox. + * + * 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 __MACH_TEGRA_DEBUG_LL_H__ +#define __MACH_TEGRA_DEBUG_LL_H__ + +#include <asm/io.h> +#include <mach/tegra/iomap.h> + +#define DEBUG_LL_UART_ADDR TEGRA_UARTA_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 /* __MACH_TEGRA_DEBUG_LL_H__ */ |