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 * 6 * Copyright (C) 2010 John Crispin <blogic@openwrt.org> 7 */ 8 9 #include <linux/cpu.h> 10 #include <lantiq_soc.h> 11 12 #define ASC_BUF 1024 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 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') 29 ltq_w8('\r', LTQ_ASC_TBUF); 30 ltq_w8(c, LTQ_ASC_TBUF); 31 local_irq_restore(flags); 32 } 33