blob: e3bf7ba339db784daf0bfc6b38dd8782f66c2a9f (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
|
/*
* Ralink RT3662/RT3883 SoC early printk support
*
* Copyright (C) 2011-2012 Gabor Juhos <juhosg@openwrt.org>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 as published
* by the Free Software Foundation.
*/
#include <linux/io.h>
#include <linux/serial_reg.h>
#include <asm/addrspace.h>
#include <asm/mach-ralink/rt3883_regs.h>
#define UART_READ(r) \
__raw_readl((void __iomem *)(KSEG1ADDR(RT3883_UART1_BASE) + 4 * (r)))
#define UART_WRITE(r, v) \
__raw_writel((v), (void __iomem *)(KSEG1ADDR(RT3883_UART1_BASE) + 4 * (r)))
void prom_putchar(unsigned char ch)
{
while (((UART_READ(RT3883_UART_REG_LSR)) & UART_LSR_THRE) == 0);
UART_WRITE(RT3883_UART_REG_TX, ch);
while (((UART_READ(RT3883_UART_REG_LSR)) & UART_LSR_THRE) == 0);
}
|
