[linux-2.6-block.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 <bcm63xx_io.h>
#include <linux/serial_bcm63xx.h>

static void 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 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
e7300d04	9	#include <bcm63xx_io.h>
e95acd3d	10	#include <linux/serial_bcm63xx.h>
e7300d04	11
f7be4e75	12	static void wait_xfered(void)
e7300d04 MB	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
f7be4e75	24	void prom_putchar(char c)
e7300d04 MB	25	{
	26	wait_xfered();
	27	bcm_uart0_writel(c, UART_FIFO_REG);
	28	wait_xfered();
	29	}