[deliverable/linux.git] / arch / mips / bcm63xx / early_printk.c

/*
 * This file is subject to the terms and conditions of the GNU General Public
 * License.  See the file "COPYING" in the main directory of this archive
 * for more details.
 *
 * Copyright (C) 2008 Maxime Bizon <mbizon@freebox.fr>
 */

#include <linux/init.h>
#include <bcm63xx_io.h>
#include <bcm63xx_regs.h>

static void __init wait_xfered(void)
{
	unsigned int val;

	/* wait for any previous char to be transmitted */
	do {
		val = bcm_uart0_readl(UART_IR_REG);
		if (val & UART_IR_STAT(UART_IR_TXEMPTY))
			break;
	} while (1);
}

void __init prom_putchar(char c)
{
	wait_xfered();
	bcm_uart0_writel(c, UART_FIFO_REG);
	wait_xfered();
}
Commit	Line	Data
e7300d04 MB	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
	13	static 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
	25	void __init prom_putchar(char c)
	26	{
	27	wait_xfered();
	28	bcm_uart0_writel(c, UART_FIFO_REG);
	29	wait_xfered();
	30	}