mirror of https://gitee.com/openkylin/linux.git
34 lines
834 B
C
34 lines
834 B
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>
|
|
#include <asm/setup.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);
|
|
}
|