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OSCL-LXR

 
 

    


0001 // SPDX-License-Identifier: GPL-2.0
0002 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
0003 
0004 #include <linux/kernel.h>
0005 #include <linux/console.h>
0006 #include <linux/errno.h>
0007 #include <linux/string.h>
0008 
0009 #include "console_cmdline.h"
0010 #include "braille.h"
0011 
0012 int _braille_console_setup(char **str, char **brl_options)
0013 {
0014     size_t len;
0015 
0016     len = str_has_prefix(*str, "brl,");
0017     if (len) {
0018         *brl_options = "";
0019         *str += len;
0020         return 0;
0021     }
0022 
0023     len = str_has_prefix(*str, "brl=");
0024     if (len) {
0025         *brl_options = *str + len;
0026         *str = strchr(*brl_options, ',');
0027         if (!*str) {
0028             pr_err("need port name after brl=\n");
0029             return -EINVAL;
0030         }
0031         *((*str)++) = 0;
0032     }
0033 
0034     return 0;
0035 }
0036 
0037 int
0038 _braille_register_console(struct console *console, struct console_cmdline *c)
0039 {
0040     int rtn = 0;
0041 
0042     if (c->brl_options) {
0043         console->flags |= CON_BRL;
0044         rtn = braille_register_console(console, c->index, c->options,
0045                            c->brl_options);
0046     }
0047 
0048     return rtn;
0049 }
0050 
0051 int
0052 _braille_unregister_console(struct console *console)
0053 {
0054     if (console->flags & CON_BRL)
0055         return braille_unregister_console(console);
0056 
0057     return 0;
0058 }