kernel/printk/braille.c

   1 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
   2
   3 #include <linux/kernel.h>
   4 #include <linux/console.h>
   5 #include <linux/string.h>
   6
   7 #include "console_cmdline.h"
   8 #include "braille.h"
   9
  10 char *_braille_console_setup(char **str, char **brl_options)
  11 {
  12         if (!memcmp(*str, "brl,", 4)) {
  13                 *brl_options = "";
  14                 *str += 4;
  15         } else if (!memcmp(str, "brl=", 4)) {
  16                 *brl_options = *str + 4;
  17                 *str = strchr(*brl_options, ',');
  18                 if (!*str)
  19                         pr_err("need port name after brl=\n");
  20                 else
  21                         *((*str)++) = 0;
  22         } else
  23                 return NULL;
  24
  25         return *str;
  26 }
  27
  28 int
  29 _braille_register_console(struct console *console, struct console_cmdline *c)
  30 {
  31         int rtn = 0;
  32
  33         if (c->brl_options) {
  34                 console->flags |= CON_BRL;
  35                 rtn = braille_register_console(console, c->index, c->options,
  36                                                c->brl_options);
  37         }
  38
  39         return rtn;
  40 }
  41
  42 int
  43 _braille_unregister_console(struct console *console)
  44 {
  45         if (console->flags & CON_BRL)
  46                 return braille_unregister_console(console);
  47
  48         return 0;
  49 }