linux/kernel/printk/braille.c
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   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
  10char *_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
  28int
  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
  42int
  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}
  50
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