32 lines
685 B
C
32 lines
685 B
C
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// SPDX-License-Identifier: GPL-2.0-only
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/*
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*
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* Copyright (C) 2010 John Crispin <john@phrozen.org>
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*/
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#include <linux/cpu.h>
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#include <lantiq_soc.h>
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#include <asm/setup.h>
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#define ASC_BUF 1024
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#define LTQ_ASC_FSTAT ((u32 *)(LTQ_EARLY_ASC + 0x0048))
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#ifdef __BIG_ENDIAN
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#define LTQ_ASC_TBUF ((u32 *)(LTQ_EARLY_ASC + 0x0020 + 3))
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#else
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#define LTQ_ASC_TBUF ((u32 *)(LTQ_EARLY_ASC + 0x0020))
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#endif
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#define TXMASK 0x3F00
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#define TXOFFSET 8
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void prom_putchar(char c)
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{
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unsigned long flags;
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local_irq_save(flags);
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do { } while ((ltq_r32(LTQ_ASC_FSTAT) & TXMASK) >> TXOFFSET);
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if (c == '\n')
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ltq_w8('\r', LTQ_ASC_TBUF);
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ltq_w8(c, LTQ_ASC_TBUF);
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local_irq_restore(flags);
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}
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