1e7300d04SMaxime Bizon /* 2e7300d04SMaxime Bizon * This file is subject to the terms and conditions of the GNU General Public 3e7300d04SMaxime Bizon * License. See the file "COPYING" in the main directory of this archive 4e7300d04SMaxime Bizon * for more details. 5e7300d04SMaxime Bizon * 6e7300d04SMaxime Bizon * Copyright (C) 2008 Maxime Bizon <mbizon@freebox.fr> 7e7300d04SMaxime Bizon */ 8e7300d04SMaxime Bizon 9e7300d04SMaxime Bizon #include <bcm63xx_io.h> 10e95acd3dSFlorian Fainelli #include <linux/serial_bcm63xx.h> 11*5c93316cSAlexander Sverdlin #include <asm/setup.h> 12e7300d04SMaxime Bizon wait_xfered(void)13f7be4e75SAaro Koskinenstatic void wait_xfered(void) 14e7300d04SMaxime Bizon { 15e7300d04SMaxime Bizon unsigned int val; 16e7300d04SMaxime Bizon 17e7300d04SMaxime Bizon /* wait for any previous char to be transmitted */ 18e7300d04SMaxime Bizon do { 19e7300d04SMaxime Bizon val = bcm_uart0_readl(UART_IR_REG); 20e7300d04SMaxime Bizon if (val & UART_IR_STAT(UART_IR_TXEMPTY)) 21e7300d04SMaxime Bizon break; 22e7300d04SMaxime Bizon } while (1); 23e7300d04SMaxime Bizon } 24e7300d04SMaxime Bizon prom_putchar(char c)25f7be4e75SAaro Koskinenvoid prom_putchar(char c) 26e7300d04SMaxime Bizon { 27e7300d04SMaxime Bizon wait_xfered(); 28e7300d04SMaxime Bizon bcm_uart0_writel(c, UART_FIFO_REG); 29e7300d04SMaxime Bizon wait_xfered(); 30e7300d04SMaxime Bizon } 31