LXR linux/arch/mips/bcm63xx/early

   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#include <asm/setup.h>
  12
  13static void 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 prom_putchar(char c)
  26{
  27        wait_xfered();
  28        bcm_uart0_writel(c, UART_FIFO_REG);
  29        wait_xfered();
  30}
  31