1 | // SPDX-License-Identifier: GPL-2.0 |
2 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
3 | |
4 | #include <linux/kernel.h> |
5 | #include <linux/console.h> |
6 | #include <linux/errno.h> |
7 | #include <linux/string.h> |
8 | |
9 | #include "console_cmdline.h" |
10 | #include "braille.h" |
11 | |
12 | int _braille_console_setup(char **str, char **brl_options) |
13 | { |
14 | size_t len; |
15 | |
16 | len = str_has_prefix(str: *str, prefix: "brl," ); |
17 | if (len) { |
18 | *brl_options = "" ; |
19 | *str += len; |
20 | return 0; |
21 | } |
22 | |
23 | len = str_has_prefix(str: *str, prefix: "brl=" ); |
24 | if (len) { |
25 | *brl_options = *str + len; |
26 | *str = strchr(*brl_options, ','); |
27 | if (!*str) { |
28 | pr_err("need port name after brl=\n" ); |
29 | return -EINVAL; |
30 | } |
31 | *((*str)++) = 0; |
32 | } |
33 | |
34 | return 0; |
35 | } |
36 | |
37 | int |
38 | _braille_register_console(struct console *console, struct console_cmdline *c) |
39 | { |
40 | int rtn = 0; |
41 | |
42 | if (c->brl_options) { |
43 | console->flags |= CON_BRL; |
44 | rtn = braille_register_console(console, index: c->index, console_options: c->options, |
45 | braille_options: c->brl_options); |
46 | } |
47 | |
48 | return rtn; |
49 | } |
50 | |
51 | int |
52 | _braille_unregister_console(struct console *console) |
53 | { |
54 | if (console->flags & CON_BRL) |
55 | return braille_unregister_console(console); |
56 | |
57 | return 0; |
58 | } |
59 | |