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/errno.h>
   6 #include <linux/string.h>
   7
   8 #include "console_cmdline.h"
   9 #include "braille.h"
  10
  11 int _braille_console_setup(char **str, char **brl_options)
  12 {
  13         if (!strncmp(*str, "brl,", 4)) {
  14                 *brl_options = "";
  15                 *str += 4;
  16         } else if (!strncmp(*str, "brl=", 4)) {
  17                 *brl_options = *str + 4;
  18                 *str = strchr(*brl_options, ',');
  19                 if (!*str) {
  20                         pr_err("need port name after brl=\n");
  21                         return -EINVAL;
  22                 }
  23                 *((*str)++) = 0;
  24         }
  25
  26         return 0;
  27 }
  28
  29 int
  30 _braille_register_console(struct console *console, struct console_cmdline *c)
  31 {
  32         int rtn = 0;
  33
  34         if (c->brl_options) {
  35                 console->flags |= CON_BRL;
  36                 rtn = braille_register_console(console, c->index, c->options,
  37                                                c->brl_options);
  38         }
  39
  40         return rtn;
  41 }
  42
  43 int
  44 _braille_unregister_console(struct console *console)
  45 {
  46         if (console->flags & CON_BRL)
  47                 return braille_unregister_console(console);
  48
  49         return 0;
  50 }