// SPDX-License-Identifier: GPL-2.0
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

#include <linux/kernel.h>
#include <linux/console.h>
#include <linux/errno.h>
#include <linux/string.h>

#include "console_cmdline.h"
#include "braille.h"

int _braille_console_setup(char **str, char **brl_options)
{
        size_t len;

        len = str_has_prefix(*str, "brl,");
        if (len) {
                *brl_options = "";
                *str += len;
                return 0;
        }

        len = str_has_prefix(*str, "brl=");
        if (len) {
                *brl_options = *str + len;
                *str = strchr(*brl_options, ',');
                if (!*str) {
                        pr_err("need port name after brl=\n");
                        return -EINVAL;
                }
                *((*str)++) = 0;
        }

        return 0;
}

int
_braille_register_console(struct console *console, struct console_cmdline *c)
{
        int rtn = 0;

        if (c->brl_options) {
                console->flags |= CON_BRL;
                rtn = braille_register_console(console, c->index, c->options,
                                               c->brl_options);
        }

        return rtn;
}

int
_braille_unregister_console(struct console *console)
{
        if (console->flags & CON_BRL)
                return braille_unregister_console(console);

        return 0;
}