[deliverable/linux.git] / arch / mips / lantiq / early_printk.c

/*
 *  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.
 *
 *  Copyright (C) 2010 John Crispin <john@phrozen.org>
 */

#include <linux/cpu.h>
#include <lantiq_soc.h>

#define ASC_BUF		1024
#define LTQ_ASC_FSTAT	((u32 *)(LTQ_EARLY_ASC + 0x0048))
#ifdef __BIG_ENDIAN
#define LTQ_ASC_TBUF	((u32 *)(LTQ_EARLY_ASC + 0x0020 + 3))
#else
#define LTQ_ASC_TBUF	((u32 *)(LTQ_EARLY_ASC + 0x0020))
#endif
#define TXMASK		0x3F00
#define TXOFFSET	8

void prom_putchar(char c)
{
	unsigned long flags;

	local_irq_save(flags);
	do { } while ((ltq_r32(LTQ_ASC_FSTAT) & TXMASK) >> TXOFFSET);
	if (c == '\n')
		ltq_w8('\r', LTQ_ASC_TBUF);
	ltq_w8(c, LTQ_ASC_TBUF);
	local_irq_restore(flags);
}
Commit	Line	Data
171bb2f1 JC	1	/*
	2	* This program is free software; you can redistribute it and/or modify it
	3	* under the terms of the GNU General Public License version 2 as published
	4	* by the Free Software Foundation.
	5	*
97b92108	6	* Copyright (C) 2010 John Crispin <john@phrozen.org>
171bb2f1 JC	7	*/
171bb2f1 JC	8
171bb2f1	9	#include <linux/cpu.h>
171bb2f1 JC	10	#include <lantiq_soc.h>
171bb2f1 JC	11
171bb2f1	12	#define ASC_BUF 1024
7705f686 TL	13	#define LTQ_ASC_FSTAT ((u32 *)(LTQ_EARLY_ASC + 0x0048))
	14	#ifdef __BIG_ENDIAN
	15	#define LTQ_ASC_TBUF ((u32 *)(LTQ_EARLY_ASC + 0x0020 + 3))
	16	#else
	17	#define LTQ_ASC_TBUF ((u32 *)(LTQ_EARLY_ASC + 0x0020))
	18	#endif
171bb2f1 JC	19	#define TXMASK 0x3F00
	20	#define TXOFFSET 8
	21
	22	void prom_putchar(char c)
	23	{
	24	unsigned long flags;
	25
	26	local_irq_save(flags);
	27	do { } while ((ltq_r32(LTQ_ASC_FSTAT) & TXMASK) >> TXOFFSET);
	28	if (c == '\n')
7705f686 TL	29	ltq_w8('\r', LTQ_ASC_TBUF);
7705f686 TL	30	ltq_w8(c, LTQ_ASC_TBUF);
171bb2f1 JC	31	local_irq_restore(flags);
171bb2f1 JC	32	}