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#include "decompress.h"
12
13#if defined(CONFIG_MACH_LOONGSON64) || defined(CONFIG_MIPS_MALTA)
14#define UART_BASE 0x1fd003f8
15#define PORT(offset) (CKSEG1ADDR(UART_BASE) + (offset))
16#endif
17
18#ifdef CONFIG_MACH_INGENIC
19#define INGENIC_UART_BASE_ADDR	(0x10030000 + 0x1000 * CONFIG_ZBOOT_INGENIC_UART)
20#define PORT(offset) (CKSEG1ADDR(INGENIC_UART_BASE_ADDR) + (4 * offset))
21#endif
22
23#ifndef IOTYPE
24#define IOTYPE char
25#endif
26
27#ifndef PORT
28#error please define the serial port address for your own machine
29#endif
30
31static inline unsigned int serial_in(int offset)
32{
33	return *((volatile IOTYPE *)PORT(offset)) & 0xFF;
34}
35
36static inline void serial_out(int offset, int value)
37{
38	*((volatile IOTYPE *)PORT(offset)) = value & 0xFF;
39}
40
41void putc(char c)
42{
43	int timeout = 1000000;
44
45	while (((serial_in(UART_LSR) & UART_LSR_THRE) == 0) && (timeout-- > 0))
46		;
47
48	serial_out(UART_TX, c);
49}

 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_MACH_INGENIC
17#define INGENIC_UART_BASE_ADDR	(0x10030000 + 0x1000 * CONFIG_ZBOOT_INGENIC_UART)
18#define PORT(offset) (CKSEG1ADDR(INGENIC_UART_BASE_ADDR) + (4 * offset))
19#endif
20
21#ifndef IOTYPE
22#define IOTYPE char
23#endif
24
25#ifndef PORT
26#error please define the serial port address for your own machine
27#endif
28
29static inline unsigned int serial_in(int offset)
30{
31	return *((volatile IOTYPE *)PORT(offset)) & 0xFF;
32}
33
34static inline void serial_out(int offset, int value)
35{
36	*((volatile IOTYPE *)PORT(offset)) = value & 0xFF;
37}
38
39void putc(char c)
40{
41	int timeout = 1000000;
42
43	while (((serial_in(UART_LSR) & UART_LSR_THRE) == 0) && (timeout-- > 0))
44		;
45
46	serial_out(UART_TX, c);
47}