45 lines
1 KiB
C
45 lines
1 KiB
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) 2010 Gabor Juhos <juhosg@openwrt.org>
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include <linux/mm.h>
|
||
|
|
#include <linux/io.h>
|
||
|
|
#include <linux/serial_reg.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(unsigned 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, ch);
|
||
|
|
while ((prom_uart_rr(base, UART_LSR) & UART_LSR_THRE) == 0)
|
||
|
|
;
|
||
|
|
}
|