input: Add ANSI 3.64 escape sequence generation.

To support Non-ASCII keys (ex, Fn, PgUp/Dn, arrow keys, ...), we need to
translate key code into escape sequence.

(Updated by [email protected] to move away from a function to store
keycodes, so we can easily record how many were sent. We now need to
return this from input_send_keycodes() so we know whether keys were
generated.)

Signed-off-by: Hung-Te Lin <[email protected]>
Signed-off-by: Simon Glass <[email protected]>
Signed-off-by: Tom Rini <[email protected]>

1 files changed, 2 insertions, 0 deletions

diff --git a/include/input.h b/include/input.h
index 0f4acb27f83..e90bb0ba9c6 100644
--- a/include/input.h
+++ b/include/input.h
@@ -84,6 +84,8 @@ struct stdio_dev;
  * @param config	Input state
  * @param keycode	List of key codes to examine
  * @param num_keycodes	Number of key codes
+ * @return number of ascii characters sent, or 0 if none, or -1 for an
+ *	internal error
  */
 int input_send_keycodes(struct input_config *config, int keycode[], int count);