[RFC 1/5] MIPS: add common header file for DEBUG_LL via NS16550

[Sascha Hauer]

On Thu, May 10, 2012 at 01:32:06PM +0400, Antony Pavlov wrote:
> Signed-off-by: Antony Pavlov <antonynpavlov at gmail.com>
> ---
>  arch/mips/include/debug_ll_common.h |   40 +++++++++++++++++++++++++++++++++++
>  1 file changed, 40 insertions(+)
>  create mode 100644 arch/mips/include/debug_ll_common.h
> 
> diff --git a/arch/mips/include/debug_ll_common.h b/arch/mips/include/debug_ll_common.h

Does that mean that every mips has a ns16550? If not the file should
have 16550 in its name.

Sascha

> new file mode 100644
> index 0000000..7c26f54
> --- /dev/null
> +++ b/arch/mips/include/debug_ll_common.h
> @@ -0,0 +1,40 @@
> +/*
> + * Copyright (C) 2012 Antony Pavlov <antonynpavlov at 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_COMMON_H__
> +#define __INCLUDE_ARCH_DEBUG_LL_COMMON_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_COMMON_H__ */
> -- 
> 1.7.10
> 
> 
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