| John Crispin | 171bb2f | 2011-03-30 09:27:47 +0200 | [diff] [blame^] | 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/init.h> |
| 10 | #include <linux/cpu.h> |
| 11 | |
| 12 | #include <lantiq.h> |
| 13 | #include <lantiq_soc.h> |
| 14 | |
| 15 | /* no ioremap possible at this early stage, lets use KSEG1 instead */ |
| 16 | #define LTQ_ASC_BASE KSEG1ADDR(LTQ_ASC1_BASE_ADDR) |
| 17 | #define ASC_BUF 1024 |
| 18 | #define LTQ_ASC_FSTAT ((u32 *)(LTQ_ASC_BASE + 0x0048)) |
| 19 | #define LTQ_ASC_TBUF ((u32 *)(LTQ_ASC_BASE + 0x0020)) |
| 20 | #define TXMASK 0x3F00 |
| 21 | #define TXOFFSET 8 |
| 22 | |
| 23 | void prom_putchar(char c) |
| 24 | { |
| 25 | unsigned long flags; |
| 26 | |
| 27 | local_irq_save(flags); |
| 28 | do { } while ((ltq_r32(LTQ_ASC_FSTAT) & TXMASK) >> TXOFFSET); |
| 29 | if (c == '\n') |
| 30 | ltq_w32('\r', LTQ_ASC_TBUF); |
| 31 | ltq_w32(c, LTQ_ASC_TBUF); |
| 32 | local_irq_restore(flags); |
| 33 | } |