tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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
12static 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
24void prom_putchar(char c)
25{
26 wait_xfered();
27 bcm_uart0_writel(c, UART_FIFO_REG);
28 wait_xfered();
29}