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Diffstat (limited to 'kernel/printk/braille.c')
-rw-r--r--kernel/printk/braille.c49
1 files changed, 49 insertions, 0 deletions
diff --git a/kernel/printk/braille.c b/kernel/printk/braille.c
new file mode 100644
index 000000000..276762f3a
--- /dev/null
+++ b/kernel/printk/braille.c
@@ -0,0 +1,49 @@
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/kernel.h>
+#include <linux/console.h>
+#include <linux/string.h>
+
+#include "console_cmdline.h"
+#include "braille.h"
+
+char *_braille_console_setup(char **str, char **brl_options)
+{
+ if (!memcmp(*str, "brl,", 4)) {
+ *brl_options = "";
+ *str += 4;
+ } else if (!memcmp(str, "brl=", 4)) {
+ *brl_options = *str + 4;
+ *str = strchr(*brl_options, ',');
+ if (!*str)
+ pr_err("need port name after brl=\n");
+ else
+ *((*str)++) = 0;
+ } else
+ return NULL;
+
+ return *str;
+}
+
+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;
+}