18c2ecf20Sopenharmony_ci// SPDX-License-Identifier: GPL-2.0-only 28c2ecf20Sopenharmony_ci/* 38c2ecf20Sopenharmony_ci * 48c2ecf20Sopenharmony_ci * Copyright (C) 2010 John Crispin <john@phrozen.org> 58c2ecf20Sopenharmony_ci */ 68c2ecf20Sopenharmony_ci 78c2ecf20Sopenharmony_ci#include <linux/cpu.h> 88c2ecf20Sopenharmony_ci#include <lantiq_soc.h> 98c2ecf20Sopenharmony_ci#include <asm/setup.h> 108c2ecf20Sopenharmony_ci 118c2ecf20Sopenharmony_ci#define ASC_BUF 1024 128c2ecf20Sopenharmony_ci#define LTQ_ASC_FSTAT ((u32 *)(LTQ_EARLY_ASC + 0x0048)) 138c2ecf20Sopenharmony_ci#ifdef __BIG_ENDIAN 148c2ecf20Sopenharmony_ci#define LTQ_ASC_TBUF ((u32 *)(LTQ_EARLY_ASC + 0x0020 + 3)) 158c2ecf20Sopenharmony_ci#else 168c2ecf20Sopenharmony_ci#define LTQ_ASC_TBUF ((u32 *)(LTQ_EARLY_ASC + 0x0020)) 178c2ecf20Sopenharmony_ci#endif 188c2ecf20Sopenharmony_ci#define TXMASK 0x3F00 198c2ecf20Sopenharmony_ci#define TXOFFSET 8 208c2ecf20Sopenharmony_ci 218c2ecf20Sopenharmony_civoid prom_putchar(char c) 228c2ecf20Sopenharmony_ci{ 238c2ecf20Sopenharmony_ci unsigned long flags; 248c2ecf20Sopenharmony_ci 258c2ecf20Sopenharmony_ci local_irq_save(flags); 268c2ecf20Sopenharmony_ci do { } while ((ltq_r32(LTQ_ASC_FSTAT) & TXMASK) >> TXOFFSET); 278c2ecf20Sopenharmony_ci if (c == '\n') 288c2ecf20Sopenharmony_ci ltq_w8('\r', LTQ_ASC_TBUF); 298c2ecf20Sopenharmony_ci ltq_w8(c, LTQ_ASC_TBUF); 308c2ecf20Sopenharmony_ci local_irq_restore(flags); 318c2ecf20Sopenharmony_ci} 32