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grub2/SOURCES/0318-at_keyboard-use-set-1-...

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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Renaud=20M=C3=A9trich?= <rmetrich@redhat.com>
Date: Thu, 3 Dec 2020 09:13:24 +0100
Subject: [PATCH] at_keyboard: use set 1 when keyboard is in Translate mode
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
When keyboard controller acts in Translate mode (0x40 mask), then use
set 1 since translation is done.
Otherwise use the mode queried from the controller (usually set 2).
Added "atkeyb" debugging messages in at_keyboard module as well.
Resolves: rhbz#1897587
Tested on:
- Asus N53SN (set 1 used)
- Dell Precision (set 1 used)
- HP Elitebook (set 2 used)
- HP G5430 (set 1 used, keyboard in XT mode!)
- Lenovo P71 & Lenovo T460s (set 2 used)
- QEMU/KVM (set 1 used)
Signed-off-by: Renaud Métrich <rmetrich@redhat.com>
---
grub-core/term/at_keyboard.c | 29 ++++++++++++++++++++++++-----
include/grub/at_keyboard.h | 4 ++++
2 files changed, 28 insertions(+), 5 deletions(-)
diff --git a/grub-core/term/at_keyboard.c b/grub-core/term/at_keyboard.c
index f0a986eb1..69d99b61d 100644
--- a/grub-core/term/at_keyboard.c
+++ b/grub-core/term/at_keyboard.c
@@ -135,20 +135,28 @@ query_mode (void)
int e;
e = write_mode (0);
- if (!e)
+ if (!e) {
+ grub_dprintf("atkeyb", "query_mode: write_mode(0) failed\n");
return 0;
+ }
do {
keyboard_controller_wait_until_ready ();
ret = grub_inb (KEYBOARD_REG_DATA);
} while (ret == GRUB_AT_ACK);
/* QEMU translates the set even in no-translate mode. */
- if (ret == 0x43 || ret == 1)
+ if (ret == 0x43 || ret == 1) {
+ grub_dprintf("atkeyb", "query_mode: returning 1 (ret=0x%x)\n", ret);
return 1;
- if (ret == 0x41 || ret == 2)
+ }
+ if (ret == 0x41 || ret == 2) {
+ grub_dprintf("atkeyb", "query_mode: returning 2 (ret=0x%x)\n", ret);
return 2;
- if (ret == 0x3f || ret == 3)
+ }
+ if (ret == 0x3f || ret == 3) {
+ grub_dprintf("atkeyb", "query_mode: returning 3 (ret=0x%x)\n", ret);
return 3;
+ }
return 0;
}
@@ -165,7 +173,13 @@ set_scancodes (void)
}
#if !USE_SCANCODE_SET
- ps2_state.current_set = 1;
+ if ((grub_keyboard_controller_orig & KEYBOARD_AT_TRANSLATE) == KEYBOARD_AT_TRANSLATE) {
+ grub_dprintf ("atkeyb", "queried set is %d but keyboard in Translate mode, so actually in set 1\n", grub_keyboard_orig_set);
+ ps2_state.current_set = 1;
+ } else {
+ grub_dprintf ("atkeyb", "using queried set %d\n", grub_keyboard_orig_set);
+ ps2_state.current_set = grub_keyboard_orig_set;
+ }
return;
#else
@@ -266,6 +280,7 @@ grub_keyboard_controller_init (void)
grub_keyboard_orig_set = 2;
#else
grub_keyboard_controller_orig = grub_keyboard_controller_read ();
+ grub_dprintf ("atkeyb", "grub_keyboard_controller_orig = 0x%x\n", grub_keyboard_controller_orig);
grub_keyboard_orig_set = query_mode ();
#endif
set_scancodes ();
@@ -275,11 +290,15 @@ grub_keyboard_controller_init (void)
static grub_err_t
grub_keyboard_controller_fini (struct grub_term_input *term __attribute__ ((unused)))
{
+/* In !USE_SCANCODE_SET mode, we didn't change anything, so nothing to restore */
+#if USE_SCANCODE_SET
if (ps2_state.current_set == 0)
return GRUB_ERR_NONE;
+ grub_dprintf ("atkeyb", "restoring set %d, controller 0x%x\n", grub_keyboard_orig_set, grub_keyboard_controller_orig);
if (grub_keyboard_orig_set)
write_mode (grub_keyboard_orig_set);
grub_keyboard_controller_write (grub_keyboard_controller_orig);
+#endif
return GRUB_ERR_NONE;
}
diff --git a/include/grub/at_keyboard.h b/include/grub/at_keyboard.h
index bcb4d9ba7..9414dc1b9 100644
--- a/include/grub/at_keyboard.h
+++ b/include/grub/at_keyboard.h
@@ -19,6 +19,10 @@
#ifndef GRUB_AT_KEYBOARD_HEADER
#define GRUB_AT_KEYBOARD_HEADER 1
+/*
+ * Refer to https://wiki.osdev.org/%228042%22_PS/2_Controller for details.
+ */
+
/* Used for sending commands to the controller. */
#define KEYBOARD_COMMAND_ISREADY(x) !((x) & 0x02)
#define KEYBOARD_COMMAND_READ 0x20