[linux-block.git] / arch / mips / boot / compressed / uart-16550.c

// SPDX-License-Identifier: GPL-2.0
/*
 * 16550 compatible uart based serial debug support for zboot
 */

#include <linux/types.h>
#include <linux/serial_reg.h>

#include <asm/addrspace.h>

#include "decompress.h"

#if defined(CONFIG_MACH_LOONGSON64) || defined(CONFIG_MIPS_MALTA)
#define UART_BASE 0x1fd003f8
#define PORT(offset) (CKSEG1ADDR(UART_BASE) + (offset))
#endif

#ifdef CONFIG_MACH_INGENIC
#define INGENIC_UART_BASE_ADDR	(0x10030000 + 0x1000 * CONFIG_ZBOOT_INGENIC_UART)
#define PORT(offset) (CKSEG1ADDR(INGENIC_UART_BASE_ADDR) + (4 * offset))
#endif

#ifdef CONFIG_ECONET
#define EN75_UART_BASE	0x1fbf0003
#define PORT(offset)	(CKSEG1ADDR(EN75_UART_BASE) + (4 * (offset)))
#endif

#ifndef IOTYPE
#define IOTYPE char
#endif

#ifndef PORT
#error please define the serial port address for your own machine
#endif

static inline unsigned int serial_in(int offset)
{
	return *((volatile IOTYPE *)PORT(offset)) & 0xFF;
}

static inline void serial_out(int offset, int value)
{
	*((volatile IOTYPE *)PORT(offset)) = value & 0xFF;
}

void putc(char c)
{
	int timeout = 1000000;

	while (((serial_in(UART_LSR) & UART_LSR_THRE) == 0) && (timeout-- > 0))
		;

	serial_out(UART_TX, c);
}
Commit	Line	Data
	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	#ifdef CONFIG_ECONET
	24	#define EN75_UART_BASE 0x1fbf0003
	25	#define PORT(offset) (CKSEG1ADDR(EN75_UART_BASE) + (4 * (offset)))
	26	#endif
	27
	28	#ifndef IOTYPE
	29	#define IOTYPE char
	30	#endif
	31
	32	#ifndef PORT
	33	#error please define the serial port address for your own machine
	34	#endif
	35
	36	static inline unsigned int serial_in(int offset)
	37	{
	38	return ((volatile IOTYPE )PORT(offset)) & 0xFF;
	39	}
	40
	41	static inline void serial_out(int offset, int value)
	42	{
	43	((volatile IOTYPE )PORT(offset)) = value & 0xFF;
	44	}
	45
	46	void putc(char c)
	47	{
	48	int timeout = 1000000;
	49
	50	while (((serial_in(UART_LSR) & UART_LSR_THRE) == 0) && (timeout-- > 0))
	51	;
	52
	53	serial_out(UART_TX, c);
	54	}