arch/mips/fw/arc/arc_con.c

   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);