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
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
|
/*
* 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) 2010 Gabor Juhos <juhosg@openwrt.org>
*/
#include <linux/mm.h>
#include <linux/io.h>
#include <linux/serial_reg.h>
#include <asm/setup.h>
#include "devices.h"
#include "ar2315_regs.h"
#include "ar5312_regs.h"
static inline void prom_uart_wr(void __iomem *base, unsigned reg,
unsigned char ch)
{
__raw_writel(ch, base + 4 * reg);
}
static inline unsigned char prom_uart_rr(void __iomem *base, unsigned reg)
{
return __raw_readl(base + 4 * reg);
}
void prom_putchar(char ch)
{
static void __iomem *base;
if (unlikely(base == NULL)) {
if (is_ar2315())
base = (void __iomem *)(KSEG1ADDR(AR2315_UART0_BASE));
else
base = (void __iomem *)(KSEG1ADDR(AR5312_UART0_BASE));
}
while ((prom_uart_rr(base, UART_LSR) & UART_LSR_THRE) == 0)
;
prom_uart_wr(base, UART_TX, (unsigned char)ch);
while ((prom_uart_rr(base, UART_LSR) & UART_LSR_THRE) == 0)
;
}
|
