[PATCH v2 1/1] efi_loader: support CTRL+\ - CTRL+_

[Heinrich Schuchardt]

In the extended text input protocol support input of control letters
0x1c - 0x1f.

Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt at canonical.com>
Reviewed-by: Simon Glass <sjg at chromium.org>
---
v2:
	add missing break
---
 lib/efi_loader/efi_console.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/lib/efi_loader/efi_console.c b/lib/efi_loader/efi_console.c
index 3164fd484e..56f197f39a 100644
--- a/lib/efi_loader/efi_console.c
+++ b/lib/efi_loader/efi_console.c
@@ -993,6 +993,7 @@ static efi_status_t EFIAPI efi_cin_read_key_stroke_ex(
 	/*
 	 * CTRL+A - CTRL+Z have to be signaled as a - z.
 	 * SHIFT+CTRL+A - SHIFT+CTRL+Z have to be signaled as A - Z.
+	 * CTRL+\ - CTRL+_ have to be signaled as \ - _.
 	 */
 	switch (next_key.key.unicode_char) {
 	case 0x01 ... 0x07:
@@ -1005,6 +1006,9 @@ static efi_status_t EFIAPI efi_cin_read_key_stroke_ex(
 			next_key.key.unicode_char += 0x40;
 		else
 			next_key.key.unicode_char += 0x60;
+		break;
+	case 0x1c ... 0x1f:
+			next_key.key.unicode_char += 0x40;
 	}
 	*key_data = next_key;
 	key_available = false;
-- 
2.37.2