Blame SOURCES/0129-Make-CTRL-and-ALT-keys-work-as-expected-on-EFI-syste.patch

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From fe42ce5fc9eec355027a533861dfe7f2eeefc63c Mon Sep 17 00:00:00 2001
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From: Peter Jones <pjones@redhat.com>
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Date: Mon, 3 Feb 2014 15:21:46 -0500
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Subject: [PATCH 129/143] Make CTRL and ALT keys work as expected on EFI
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 systems (version 5).
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This is version 4.
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Changes from version 1:
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- handles SHIFT as a modifier
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- handles F11 and F12 keys
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- uses the handle provided by the system table to find our _EX protocol.
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Changes from version 2:
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- eliminate duplicate keycode translation.
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Changes from version 3:
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- Do not add the shift modifier for any ascii character between space
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  (0x20) and DEL (0x7f); the combination of the modifier and many of the
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  keys causes it not to be recognized at all.  Specifically, if we
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  include the modifier on any querty punctuation character, i.e.
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  anything the string "~!@#$%^&*()_+{}|:\"<>?" represents in C, it stops
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  being recognized whatsoever.
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Changes from version 4:
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- Always initialize term->data from locate protocol (i.e. make it
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  unconditional.)
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Signed-off-by: Peter Jones <pjones@redhat.com>
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---
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 grub-core/term/efi/console.c | 118 +++++++++++++++++++++++++++++++++++--------
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 include/grub/efi/api.h       |  65 +++++++++++++++++++++++-
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 2 files changed, 161 insertions(+), 22 deletions(-)
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diff --git a/grub-core/term/efi/console.c b/grub-core/term/efi/console.c
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index a37eb84..677eab5 100644
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--- a/grub-core/term/efi/console.c
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+++ b/grub-core/term/efi/console.c
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@@ -104,26 +104,12 @@ const unsigned efi_codes[] =
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     GRUB_TERM_KEY_DC, GRUB_TERM_KEY_PPAGE, GRUB_TERM_KEY_NPAGE, GRUB_TERM_KEY_F1,
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     GRUB_TERM_KEY_F2, GRUB_TERM_KEY_F3, GRUB_TERM_KEY_F4, GRUB_TERM_KEY_F5,
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     GRUB_TERM_KEY_F6, GRUB_TERM_KEY_F7, GRUB_TERM_KEY_F8, GRUB_TERM_KEY_F9,
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-    GRUB_TERM_KEY_F10, 0, 0, '\e'
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+    GRUB_TERM_KEY_F10, GRUB_TERM_KEY_F10, GRUB_TERM_KEY_F11, '\e'
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   };
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-
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 static int
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-grub_console_getkey (struct grub_term_input *term __attribute__ ((unused)))
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+grub_efi_translate_key (grub_efi_input_key_t key)
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 {
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-  grub_efi_simple_input_interface_t *i;
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-  grub_efi_input_key_t key;
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-  grub_efi_status_t status;
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-
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-  if (grub_efi_is_finished)
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-    return 0;
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-
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-  i = grub_efi_system_table->con_in;
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-  status = efi_call_2 (i->read_key_stroke, i, &key);
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-
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-  if (status != GRUB_EFI_SUCCESS)
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-    return GRUB_TERM_NO_KEY;
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-
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   if (key.scan_code == 0)
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     {
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       /* Some firmware implementations use VT100-style codes against the spec.
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@@ -139,9 +125,98 @@ grub_console_getkey (struct grub_term_input *term __attribute__ ((unused)))
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   else if (key.scan_code < ARRAY_SIZE (efi_codes))
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     return efi_codes[key.scan_code];
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+  if (key.unicode_char >= 0x20 && key.unicode_char <= 0x7f)
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+    return key.unicode_char;
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+
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   return GRUB_TERM_NO_KEY;
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 }
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+static int
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+grub_console_getkey_con (struct grub_term_input *term __attribute__ ((unused)))
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+{
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+  grub_efi_simple_input_interface_t *i;
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+  grub_efi_input_key_t key;
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+  grub_efi_status_t status;
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+
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+  i = grub_efi_system_table->con_in;
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+  status = efi_call_2 (i->read_key_stroke, i, &key);
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+
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+  if (status != GRUB_EFI_SUCCESS)
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+    return GRUB_TERM_NO_KEY;
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+
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+  return grub_efi_translate_key(key);
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+}
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+
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+static int
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+grub_console_getkey_ex(struct grub_term_input *term)
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+{
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+  grub_efi_key_data_t key_data;
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+  grub_efi_status_t status;
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+  grub_efi_uint32_t kss;
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+  int key = -1;
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+
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+  grub_efi_simple_text_input_ex_interface_t *text_input = term->data;
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+
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+  status = efi_call_2 (text_input->read_key_stroke, text_input, &key_data);
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+
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+  if (status != GRUB_EFI_SUCCESS)
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+    return GRUB_TERM_NO_KEY;
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+
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+  kss = key_data.key_state.key_shift_state;
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+  key = grub_efi_translate_key(key_data.key);
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+
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+  if (key == GRUB_TERM_NO_KEY)
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+    return GRUB_TERM_NO_KEY;
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+
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+  if (kss & GRUB_EFI_SHIFT_STATE_VALID)
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+    {
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+      if ((kss & GRUB_EFI_LEFT_SHIFT_PRESSED
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+	   || kss & GRUB_EFI_RIGHT_SHIFT_PRESSED)
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+	  && !(key >= 0x20 && key <= 0x7f))
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+	key |= GRUB_TERM_SHIFT;
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+      if (kss & GRUB_EFI_LEFT_ALT_PRESSED || kss & GRUB_EFI_RIGHT_ALT_PRESSED)
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+	key |= GRUB_TERM_ALT;
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+      if (kss & GRUB_EFI_LEFT_CONTROL_PRESSED
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+	  || kss & GRUB_EFI_RIGHT_CONTROL_PRESSED)
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+	key |= GRUB_TERM_CTRL;
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+    }
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+
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+  return key;
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+}
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+
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+static grub_err_t
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+grub_efi_console_input_init (struct grub_term_input *term)
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+{
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+  grub_efi_guid_t text_input_ex_guid =
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+    GRUB_EFI_SIMPLE_TEXT_INPUT_EX_PROTOCOL_GUID;
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+
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+  if (grub_efi_is_finished)
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+    return 0;
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+
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+  grub_efi_simple_text_input_ex_interface_t *text_input = term->data;
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+  if (text_input)
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+    return 0;
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+
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+  text_input = grub_efi_open_protocol(grub_efi_system_table->console_in_handler,
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+				      &text_input_ex_guid,
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+				      GRUB_EFI_OPEN_PROTOCOL_GET_PROTOCOL);
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+  term->data = (void *)text_input;
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+
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+  return 0;
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+}
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+
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+static int
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+grub_console_getkey (struct grub_term_input *term)
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+{
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+  if (grub_efi_is_finished)
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+    return 0;
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+
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+  if (term->data)
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+    return grub_console_getkey_ex(term);
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+  else
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+    return grub_console_getkey_con(term);
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+}
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+
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 static struct grub_term_coordinate
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 grub_console_getwh (struct grub_term_output *term __attribute__ ((unused)))
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 {
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@@ -243,7 +318,7 @@ grub_console_setcursor (struct grub_term_output *term __attribute__ ((unused)),
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 }
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 static grub_err_t
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-grub_efi_console_init (struct grub_term_output *term)
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+grub_efi_console_output_init (struct grub_term_output *term)
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 {
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   grub_efi_set_text_mode (1);
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   grub_console_setcursor (term, 1);
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@@ -251,7 +326,7 @@ grub_efi_console_init (struct grub_term_output *term)
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 }
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 static grub_err_t
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-grub_efi_console_fini (struct grub_term_output *term)
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+grub_efi_console_output_fini (struct grub_term_output *term)
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 {
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   grub_console_setcursor (term, 0);
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   grub_efi_set_text_mode (0);
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@@ -262,13 +337,14 @@ static struct grub_term_input grub_console_term_input =
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   {
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     .name = "console",
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     .getkey = grub_console_getkey,
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+    .init = grub_efi_console_input_init,
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   };
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 static struct grub_term_output grub_console_term_output =
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   {
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     .name = "console",
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-    .init = grub_efi_console_init,
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-    .fini = grub_efi_console_fini,
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+    .init = grub_efi_console_output_init,
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+    .fini = grub_efi_console_output_fini,
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     .putchar = grub_console_putchar,
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     .getwh = grub_console_getwh,
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     .getxy = grub_console_getxy,
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@@ -291,8 +367,8 @@ grub_console_init (void)
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       return;
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     }
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-  grub_term_register_input ("console", &grub_console_term_input);
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   grub_term_register_output ("console", &grub_console_term_output);
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+  grub_term_register_input ("console", &grub_console_term_input);
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 }
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 void
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diff --git a/include/grub/efi/api.h b/include/grub/efi/api.h
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index e5dd543..1423403 100644
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--- a/include/grub/efi/api.h
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+++ b/include/grub/efi/api.h
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@@ -111,7 +111,7 @@
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     { 0x8e, 0x39, 0x00, 0xa0, 0xc9, 0x69, 0x72, 0x3b } \
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   }
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-#define EFI_SIMPLE_TEXT_INPUT_EX_PROTOCOL_GUID \
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+#define GRUB_EFI_SIMPLE_TEXT_INPUT_EX_PROTOCOL_GUID \
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   { 0xdd9e7534, 0x7762, 0x4698, \
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     { 0x8c, 0x14, 0xf5, 0x85, 0x17, 0xa6, 0x25, 0xaa } \
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   }
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@@ -952,6 +952,32 @@ struct grub_efi_input_key
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 };
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 typedef struct grub_efi_input_key grub_efi_input_key_t;
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+typedef grub_efi_uint8_t grub_efi_key_toggle_state_t;
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+struct grub_efi_key_state
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+{
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+	grub_efi_uint32_t key_shift_state;
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+	grub_efi_key_toggle_state_t key_toggle_state;
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+};
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+typedef struct grub_efi_key_state grub_efi_key_state_t;
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+
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+#define GRUB_EFI_SHIFT_STATE_VALID     0x80000000
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+#define GRUB_EFI_RIGHT_SHIFT_PRESSED   0x00000001
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+#define GRUB_EFI_LEFT_SHIFT_PRESSED    0x00000002
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+#define GRUB_EFI_RIGHT_CONTROL_PRESSED 0x00000004
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+#define GRUB_EFI_LEFT_CONTROL_PRESSED  0x00000008
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+#define GRUB_EFI_RIGHT_ALT_PRESSED     0x00000010
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+#define GRUB_EFI_LEFT_ALT_PRESSED      0x00000020
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+#define GRUB_EFI_RIGHT_LOGO_PRESSED    0x00000040
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+#define GRUB_EFI_LEFT_LOGO_PRESSED     0x00000080
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+#define GRUB_EFI_MENU_KEY_PRESSED      0x00000100
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+#define GRUB_EFI_SYS_REQ_PRESSED       0x00000200
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+
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+#define GRUB_EFI_TOGGLE_STATE_VALID 0x80
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+#define GRUB_EFI_KEY_STATE_EXPOSED  0x40
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+#define GRUB_EFI_SCROLL_LOCK_ACTIVE 0x01
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+#define GRUB_EFI_NUM_LOCK_ACTIVE    0x02
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+#define GRUB_EFI_CAPS_LOCK_ACTIVE   0x04
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+
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 struct grub_efi_simple_text_output_mode
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 {
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   grub_efi_int32_t max_mode;
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@@ -1294,6 +1320,43 @@ struct grub_efi_simple_input_interface
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 };
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 typedef struct grub_efi_simple_input_interface grub_efi_simple_input_interface_t;
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+struct grub_efi_key_data {
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+	grub_efi_input_key_t key;
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+	grub_efi_key_state_t key_state;
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+};
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+typedef struct grub_efi_key_data grub_efi_key_data_t;
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+
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+typedef grub_efi_status_t (*grub_efi_key_notify_function_t) (
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+	grub_efi_key_data_t *key_data
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+	);
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+
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+struct grub_efi_simple_text_input_ex_interface
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+{
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+	grub_efi_status_t
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+	(*reset) (struct grub_efi_simple_text_input_ex_interface *this,
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+		  grub_efi_boolean_t extended_verification);
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+
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+	grub_efi_status_t
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+	(*read_key_stroke) (struct grub_efi_simple_text_input_ex_interface *this,
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+			    grub_efi_key_data_t *key_data);
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+
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+	grub_efi_event_t wait_for_key;
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+
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+	grub_efi_status_t
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+	(*set_state) (struct grub_efi_simple_text_input_ex_interface *this,
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+		      grub_efi_key_toggle_state_t *key_toggle_state);
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+
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+	grub_efi_status_t
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+	(*register_key_notify) (struct grub_efi_simple_text_input_ex_interface *this,
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+				grub_efi_key_data_t *key_data,
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+				grub_efi_key_notify_function_t key_notification_function);
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+
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+	grub_efi_status_t
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+	(*unregister_key_notify) (struct grub_efi_simple_text_input_ex_interface *this,
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+				  void *notification_handle);
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+};
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+typedef struct grub_efi_simple_text_input_ex_interface grub_efi_simple_text_input_ex_interface_t;
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+
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 struct grub_efi_simple_text_output_interface
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 {
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   grub_efi_status_t
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-- 
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1.9.3
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