1/*
 2 * 16550 compatible uart based serial debug support for zboot
 3 */
 4
 5#include <linux/types.h>
 6#include <linux/serial_reg.h>
 7#include <linux/init.h>
 8
 9#include <asm/addrspace.h>
10
11#if defined(CONFIG_MACH_LOONGSON) || defined(CONFIG_MIPS_MALTA)
12#define UART_BASE 0x1fd003f8
13#define PORT(offset) (CKSEG1ADDR(UART_BASE) + (offset))
14#endif
15
16#ifdef CONFIG_AR7
17#include <ar7.h>
18#define PORT(offset) (CKSEG1ADDR(AR7_REGS_UART0) + (4 * offset))
19#endif
20
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
21#ifndef PORT
22#error please define the serial port address for your own machine
23#endif
24
25static inline unsigned int serial_in(int offset)
26{
27	return *((char *)PORT(offset));
28}
29
30static inline void serial_out(int offset, int value)
31{
32	*((char *)PORT(offset)) = value;
33}
34
35void putc(char c)
36{
37	int timeout = 1024;
38
39	while (((serial_in(UART_LSR) & UART_LSR_THRE) == 0) && (timeout-- > 0))
40		;
41
42	serial_out(UART_TX, c);
43}

 1// SPDX-License-Identifier: GPL-2.0
 2/*
 3 * 16550 compatible uart based serial debug support for zboot
 4 */
 5
 6#include <linux/types.h>
 7#include <linux/serial_reg.h>
 
 8
 9#include <asm/addrspace.h>
10
11#if defined(CONFIG_MACH_LOONGSON64) || defined(CONFIG_MIPS_MALTA)
12#define UART_BASE 0x1fd003f8
13#define PORT(offset) (CKSEG1ADDR(UART_BASE) + (offset))
14#endif
15
16#ifdef CONFIG_AR7
17#include <ar7.h>
18#define PORT(offset) (CKSEG1ADDR(AR7_REGS_UART0) + (4 * offset))
19#endif
20
21#ifdef CONFIG_MACH_INGENIC
22#define INGENIC_UART_BASE_ADDR	(0x10030000 + 0x1000 * CONFIG_ZBOOT_INGENIC_UART)
23#define PORT(offset) (CKSEG1ADDR(INGENIC_UART_BASE_ADDR) + (4 * offset))
24#endif
25
26#ifdef CONFIG_CPU_XLR
27#define UART0_BASE  0x1EF14000
28#define PORT(offset) (CKSEG1ADDR(UART0_BASE) + (4 * offset))
29#define IOTYPE unsigned int
30#endif
31
32#ifdef CONFIG_CPU_XLP
33#define UART0_BASE  0x18030100
34#define PORT(offset) (CKSEG1ADDR(UART0_BASE) + (4 * offset))
35#define IOTYPE unsigned int
36#endif
37
38#ifndef IOTYPE
39#define IOTYPE char
40#endif
41
42#ifndef PORT
43#error please define the serial port address for your own machine
44#endif
45
46static inline unsigned int serial_in(int offset)
47{
48	return *((volatile IOTYPE *)PORT(offset)) & 0xFF;
49}
50
51static inline void serial_out(int offset, int value)
52{
53	*((volatile IOTYPE *)PORT(offset)) = value & 0xFF;
54}
55
56void putc(char c)
57{
58	int timeout = 1000000;
59
60	while (((serial_in(UART_LSR) & UART_LSR_THRE) == 0) && (timeout-- > 0))
61		;
62
63	serial_out(UART_TX, c);
64}