1/* 2 * This file is subject to the terms and conditions of the GNU General Public 3 * License. See the file "COPYING" in the main directory of this archive 4 * for more details. 5 * 6 * Copyright (C) 2008 Maxime Bizon <mbizon@freebox.fr> 7 */ 8 9#include <linux/init.h> 10#include <bcm63xx_io.h> 11#include <bcm63xx_regs.h> 12 13static void __init wait_xfered(void) 14{ 15 unsigned int val; 16 17 /* wait for any previous char to be transmitted */ 18 do { 19 val = bcm_uart0_readl(UART_IR_REG); 20 if (val & UART_IR_STAT(UART_IR_TXEMPTY)) 21 break; 22 } while (1); 23} 24 25void __init prom_putchar(char c) 26{ 27 wait_xfered(); 28 bcm_uart0_writel(c, UART_FIFO_REG); 29 wait_xfered(); 30} 31