linux/arch/mips/lantiq/early_printk.c
Thomas Gleixner d2912cb15b treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500
Based on 2 normalized pattern(s):

  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 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 #

extracted by the scancode license scanner the SPDX license identifier

  GPL-2.0-only

has been chosen to replace the boilerplate/reference in 4122 file(s).

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Enrico Weigelt <info@metux.net>
Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org>
Reviewed-by: Allison Randal <allison@lohutok.net>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190604081206.933168790@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-06-19 17:09:55 +02:00

32 lines
685 B
C

// SPDX-License-Identifier: GPL-2.0-only
/*
*
* 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);
}