13070033a16edcc21688d5ea8967c89522f833862Steven J. Hill/* 23070033a16edcc21688d5ea8967c89522f833862Steven J. Hill * This file is subject to the terms and conditions of the GNU General Public 33070033a16edcc21688d5ea8967c89522f833862Steven J. Hill * License. See the file "COPYING" in the main directory of this archive 43070033a16edcc21688d5ea8967c89522f833862Steven J. Hill * for more details. 53070033a16edcc21688d5ea8967c89522f833862Steven J. Hill * 63070033a16edcc21688d5ea8967c89522f833862Steven J. Hill * Copyright (C) 2012 MIPS Technologies, Inc. All rights reserved. 73070033a16edcc21688d5ea8967c89522f833862Steven J. Hill */ 83070033a16edcc21688d5ea8967c89522f833862Steven J. Hill#include <linux/init.h> 93070033a16edcc21688d5ea8967c89522f833862Steven J. Hill#include <linux/console.h> 103070033a16edcc21688d5ea8967c89522f833862Steven J. Hill#include <linux/serial_reg.h> 113070033a16edcc21688d5ea8967c89522f833862Steven J. Hill#include <linux/io.h> 123070033a16edcc21688d5ea8967c89522f833862Steven J. Hill 137034228792cc561e79ff8600f02884bd4c80e287Ralf Baechle#define SEAD_UART1_REGS_BASE 0xbf000800 /* ttyS1 = DB9 port */ 147034228792cc561e79ff8600f02884bd4c80e287Ralf Baechle#define SEAD_UART0_REGS_BASE 0xbf000900 /* ttyS0 = USB port */ 153070033a16edcc21688d5ea8967c89522f833862Steven J. Hill#define PORT(base_addr, offset) ((unsigned int __iomem *)(base_addr+(offset)*4)) 163070033a16edcc21688d5ea8967c89522f833862Steven J. Hill 173070033a16edcc21688d5ea8967c89522f833862Steven J. Hillstatic char console_port = 1; 183070033a16edcc21688d5ea8967c89522f833862Steven J. Hill 193070033a16edcc21688d5ea8967c89522f833862Steven J. Hillstatic inline unsigned int serial_in(int offset, unsigned int base_addr) 203070033a16edcc21688d5ea8967c89522f833862Steven J. Hill{ 213070033a16edcc21688d5ea8967c89522f833862Steven J. Hill return __raw_readl(PORT(base_addr, offset)) & 0xff; 223070033a16edcc21688d5ea8967c89522f833862Steven J. Hill} 233070033a16edcc21688d5ea8967c89522f833862Steven J. Hill 243070033a16edcc21688d5ea8967c89522f833862Steven J. Hillstatic inline void serial_out(int offset, int value, unsigned int base_addr) 253070033a16edcc21688d5ea8967c89522f833862Steven J. Hill{ 263070033a16edcc21688d5ea8967c89522f833862Steven J. Hill __raw_writel(value, PORT(base_addr, offset)); 273070033a16edcc21688d5ea8967c89522f833862Steven J. Hill} 283070033a16edcc21688d5ea8967c89522f833862Steven J. Hill 290be2abbceeb837bf938c85db03142b5b0e4675f4Steven J. Hillvoid __init fw_init_early_console(char port) 303070033a16edcc21688d5ea8967c89522f833862Steven J. Hill{ 313070033a16edcc21688d5ea8967c89522f833862Steven J. Hill console_port = port; 323070033a16edcc21688d5ea8967c89522f833862Steven J. Hill} 333070033a16edcc21688d5ea8967c89522f833862Steven J. Hill 343070033a16edcc21688d5ea8967c89522f833862Steven J. Hillint prom_putchar(char c) 353070033a16edcc21688d5ea8967c89522f833862Steven J. Hill{ 363070033a16edcc21688d5ea8967c89522f833862Steven J. Hill unsigned int base_addr; 373070033a16edcc21688d5ea8967c89522f833862Steven J. Hill 383070033a16edcc21688d5ea8967c89522f833862Steven J. Hill base_addr = console_port ? SEAD_UART1_REGS_BASE : SEAD_UART0_REGS_BASE; 393070033a16edcc21688d5ea8967c89522f833862Steven J. Hill 403070033a16edcc21688d5ea8967c89522f833862Steven J. Hill while ((serial_in(UART_LSR, base_addr) & UART_LSR_THRE) == 0) 413070033a16edcc21688d5ea8967c89522f833862Steven J. Hill ; 423070033a16edcc21688d5ea8967c89522f833862Steven J. Hill 433070033a16edcc21688d5ea8967c89522f833862Steven J. Hill serial_out(UART_TX, c, base_addr); 443070033a16edcc21688d5ea8967c89522f833862Steven J. Hill 453070033a16edcc21688d5ea8967c89522f833862Steven J. Hill return 1; 463070033a16edcc21688d5ea8967c89522f833862Steven J. Hill} 47