xref: /linux/arch/mips/fw/arc/arc_con.c (revision c79c3c34f75d72a066e292b10aa50fc758c97c89)
1 // SPDX-License-Identifier: GPL-2.0
2 /*
3  * Wrap-around code for a console using the
4  * ARC io-routines.
5  *
6  * Copyright (c) 1998 Harald Koerfgen
7  * Copyright (c) 2001 Ralf Baechle
8  * Copyright (c) 2002 Thiemo Seufer
9  */
10 #include <linux/tty.h>
11 #include <linux/major.h>
12 #include <linux/init.h>
13 #include <linux/console.h>
14 #include <linux/fs.h>
15 #include <asm/setup.h>
16 #include <asm/sgialib.h>
17 
18 static void prom_console_write(struct console *co, const char *s,
19 			       unsigned count)
20 {
21 	/* Do each character */
22 	while (count--) {
23 		if (*s == '\n')
24 			prom_putchar('\r');
25 		prom_putchar(*s++);
26 	}
27 }
28 
29 static int prom_console_setup(struct console *co, char *options)
30 {
31 	if (prom_flags & PROM_FLAG_USE_AS_CONSOLE)
32 		return 0;
33 	return -ENODEV;
34 }
35 
36 static struct console arc_cons = {
37 	.name		= "arc",
38 	.write		= prom_console_write,
39 	.setup		= prom_console_setup,
40 	.flags		= CON_PRINTBUFFER,
41 	.index		= -1,
42 };
43 
44 /*
45  *    Register console.
46  */
47 
48 static int __init arc_console_init(void)
49 {
50 	register_console(&arc_cons);
51 
52 	return 0;
53 }
54 console_initcall(arc_console_init);
55