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 <bcm63xx_io.h> 10 #include <linux/serial_bcm63xx.h> 11 12 static void wait_xfered(void) 13 { 14 unsigned int val; 15 16 /* wait for any previous char to be transmitted */ 17 do { 18 val = bcm_uart0_readl(UART_IR_REG); 19 if (val & UART_IR_STAT(UART_IR_TXEMPTY)) 20 break; 21 } while (1); 22 } 23 24 void prom_putchar(char c) 25 { 26 wait_xfered(); 27 bcm_uart0_writel(c, UART_FIFO_REG); 28 wait_xfered(); 29 } 30