promcon.c

来自「microwindows移植到S3C44B0的源码」· C语言 代码 · 共 59 行

/*
 * Wrap-around code for a console using the
 * SGI PROM io-routines.
 *
 * Copyright (c) 1999 Ulf Carlsson
 *
 * Derived from DECstation promcon.c
 * Copyright (c) 1998 Harald Koerfgen 
 */
#include <linux/tty.h>
#include <linux/major.h>
#include <linux/ptrace.h>
#include <linux/init.h>
#include <linux/console.h>
#include <linux/fs.h>

static void prom_console_write(struct console *co, const char *s,
			       unsigned count)
{
	extern int CONSOLE_CHANNEL;	// The default serial port
	unsigned i;

	for (i = 0; i < count; i++) {
		if (*s == 10)
			serial_putc(CONSOLE_CHANNEL, 13);
		serial_putc(CONSOLE_CHANNEL, *s++);
	}
}

int prom_getchar(void)
{
	return 0;
}

static kdev_t prom_console_device(struct console *c)
{
	return MKDEV(TTY_MAJOR, 64 + c->index);
}

static struct console sercons = {
    name:	"ttyS",
    write:	prom_console_write,
    device:	prom_console_device,
    flags:	CON_PRINTBUFFER,
    index:	-1,
};

/*
 *    Register console.
 */

void gal_serial_console_init(void)
{
	//  serial_init(); 
	//serial_set(115200); 

	register_console(&sercons);
}