1*4882a593Smuzhiyun /*
2*4882a593Smuzhiyun * This file is subject to the terms and conditions of the GNU General Public
3*4882a593Smuzhiyun * License. See the file "COPYING" in the main directory of this archive
4*4882a593Smuzhiyun * for more details.
5*4882a593Smuzhiyun *
6*4882a593Smuzhiyun * Copyright (C) 2010 Gabor Juhos <juhosg@openwrt.org>
7*4882a593Smuzhiyun */
8*4882a593Smuzhiyun
9*4882a593Smuzhiyun #include <linux/mm.h>
10*4882a593Smuzhiyun #include <linux/io.h>
11*4882a593Smuzhiyun #include <linux/serial_reg.h>
12*4882a593Smuzhiyun #include <asm/setup.h>
13*4882a593Smuzhiyun
14*4882a593Smuzhiyun #include "devices.h"
15*4882a593Smuzhiyun #include "ar2315_regs.h"
16*4882a593Smuzhiyun #include "ar5312_regs.h"
17*4882a593Smuzhiyun
prom_uart_wr(void __iomem * base,unsigned reg,unsigned char ch)18*4882a593Smuzhiyun static inline void prom_uart_wr(void __iomem *base, unsigned reg,
19*4882a593Smuzhiyun unsigned char ch)
20*4882a593Smuzhiyun {
21*4882a593Smuzhiyun __raw_writel(ch, base + 4 * reg);
22*4882a593Smuzhiyun }
23*4882a593Smuzhiyun
prom_uart_rr(void __iomem * base,unsigned reg)24*4882a593Smuzhiyun static inline unsigned char prom_uart_rr(void __iomem *base, unsigned reg)
25*4882a593Smuzhiyun {
26*4882a593Smuzhiyun return __raw_readl(base + 4 * reg);
27*4882a593Smuzhiyun }
28*4882a593Smuzhiyun
prom_putchar(char ch)29*4882a593Smuzhiyun void prom_putchar(char ch)
30*4882a593Smuzhiyun {
31*4882a593Smuzhiyun static void __iomem *base;
32*4882a593Smuzhiyun
33*4882a593Smuzhiyun if (unlikely(base == NULL)) {
34*4882a593Smuzhiyun if (is_ar2315())
35*4882a593Smuzhiyun base = (void __iomem *)(KSEG1ADDR(AR2315_UART0_BASE));
36*4882a593Smuzhiyun else
37*4882a593Smuzhiyun base = (void __iomem *)(KSEG1ADDR(AR5312_UART0_BASE));
38*4882a593Smuzhiyun }
39*4882a593Smuzhiyun
40*4882a593Smuzhiyun while ((prom_uart_rr(base, UART_LSR) & UART_LSR_THRE) == 0)
41*4882a593Smuzhiyun ;
42*4882a593Smuzhiyun prom_uart_wr(base, UART_TX, (unsigned char)ch);
43*4882a593Smuzhiyun while ((prom_uart_rr(base, UART_LSR) & UART_LSR_THRE) == 0)
44*4882a593Smuzhiyun ;
45*4882a593Smuzhiyun }
46