unitdev.c

来自「LINUX下的UART驱动程序」· C语言 代码 · 共 62 行

#include <linux/kernel.h>
#include <linux/module.h>
//#include "S3C2410.h"
#include <asm/arch/S3C2410.h>

int init_module(void)
{
	s3c2410_serial_init();

	return 0;
}

void cleanup_module(void)
{
	printk("the test is over ");
}

int s3c2410_serial_init(void)
{
	UCON1	= 0x05;
	ULCON1	= 0x03;
	UBRDIV1	= 0x1A;

	return 0;
}

int s3c2410_serial_read(char *rev_str,int len)
{
	int ret;

	for(ret = 0; ret < len; ret++) {
		while((UTRSTAT1 & 0x01) == 0x0); 
		*(rev_str++) = URXH1;
	}

	return ret;
}

int s3c2410_serial_write(char *send_str, int send_len)
{
	int ret;

	for(ret = 0; ret < send_len; ret++) {
		UTXH1 = *(send_str++);
		while((UTRSTAT1 & 0x02) == 0x0) ;
	}
	
	return ret;
}

void s3c2410_serial_open(void)
{
}

void s3c2410_serial_release(void)
{
}

EXPORT_SYMBOL(s3c2410_serial_write);
EXPORT_SYMBOL(s3c2410_serial_read);
EXPORT_SYMBOL(s3c2410_serial_open);