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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: =?UTF-8?q?Renaud=20M=C3=A9trich?= <rmetrich@redhat.com>
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Date: Thu, 3 Dec 2020 09:13:24 +0100
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Subject: [PATCH] at_keyboard: use set 1 when keyboard is in Translate mode
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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When keyboard controller acts in Translate mode (0x40 mask), then use
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set 1 since translation is done.
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Otherwise use the mode queried from the controller (usually set 2).
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Added "atkeyb" debugging messages in at_keyboard module as well.
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Resolves: rhbz#1897587
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Tested on:
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- Asus N53SN (set 1 used)
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- Dell Precision (set 1 used)
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- HP Elitebook (set 2 used)
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- HP G5430 (set 1 used, keyboard in XT mode!)
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- Lenovo P71 & Lenovo T460s (set 2 used)
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- QEMU/KVM (set 1 used)
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Signed-off-by: Renaud Métrich <rmetrich@redhat.com>
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---
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grub-core/term/at_keyboard.c | 29 ++++++++++++++++++++++++-----
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include/grub/at_keyboard.h | 4 ++++
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2 files changed, 28 insertions(+), 5 deletions(-)
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diff --git a/grub-core/term/at_keyboard.c b/grub-core/term/at_keyboard.c
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index 597111077b..2601438260 100644
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--- a/grub-core/term/at_keyboard.c
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+++ b/grub-core/term/at_keyboard.c
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@@ -135,20 +135,28 @@ query_mode (void)
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int e;
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e = write_mode (0);
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- if (!e)
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+ if (!e) {
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+ grub_dprintf("atkeyb", "query_mode: write_mode(0) failed\n");
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return 0;
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+ }
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do {
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keyboard_controller_wait_until_ready ();
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ret = grub_inb (KEYBOARD_REG_DATA);
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} while (ret == GRUB_AT_ACK);
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/* QEMU translates the set even in no-translate mode. */
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- if (ret == 0x43 || ret == 1)
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+ if (ret == 0x43 || ret == 1) {
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+ grub_dprintf("atkeyb", "query_mode: returning 1 (ret=0x%x)\n", ret);
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return 1;
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- if (ret == 0x41 || ret == 2)
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+ }
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+ if (ret == 0x41 || ret == 2) {
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+ grub_dprintf("atkeyb", "query_mode: returning 2 (ret=0x%x)\n", ret);
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return 2;
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- if (ret == 0x3f || ret == 3)
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+ }
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+ if (ret == 0x3f || ret == 3) {
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+ grub_dprintf("atkeyb", "query_mode: returning 3 (ret=0x%x)\n", ret);
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return 3;
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+ }
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return 0;
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}
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@@ -165,7 +173,13 @@ set_scancodes (void)
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}
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#if !USE_SCANCODE_SET
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- ps2_state.current_set = 1;
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+ if ((grub_keyboard_controller_orig & KEYBOARD_AT_TRANSLATE) == KEYBOARD_AT_TRANSLATE) {
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+ grub_dprintf ("atkeyb", "queried set is %d but keyboard in Translate mode, so actually in set 1\n", grub_keyboard_orig_set);
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+ ps2_state.current_set = 1;
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+ } else {
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+ grub_dprintf ("atkeyb", "using queried set %d\n", grub_keyboard_orig_set);
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+ ps2_state.current_set = grub_keyboard_orig_set;
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+ }
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return;
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#else
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@@ -266,6 +280,7 @@ grub_keyboard_controller_init (void)
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grub_keyboard_orig_set = 2;
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#else
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grub_keyboard_controller_orig = grub_keyboard_controller_read ();
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+ grub_dprintf ("atkeyb", "grub_keyboard_controller_orig = 0x%x\n", grub_keyboard_controller_orig);
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grub_keyboard_orig_set = query_mode ();
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#endif
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set_scancodes ();
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@@ -275,11 +290,15 @@ grub_keyboard_controller_init (void)
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static grub_err_t
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grub_keyboard_controller_fini (struct grub_term_input *term __attribute__ ((unused)))
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{
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+/* In !USE_SCANCODE_SET mode, we didn't change anything, so nothing to restore */
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+#if USE_SCANCODE_SET
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if (ps2_state.current_set == 0)
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return GRUB_ERR_NONE;
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+ grub_dprintf ("atkeyb", "restoring set %d, controller 0x%x\n", grub_keyboard_orig_set, grub_keyboard_controller_orig);
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if (grub_keyboard_orig_set)
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write_mode (grub_keyboard_orig_set);
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grub_keyboard_controller_write (grub_keyboard_controller_orig);
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+#endif
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return GRUB_ERR_NONE;
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}
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diff --git a/include/grub/at_keyboard.h b/include/grub/at_keyboard.h
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index bcb4d9ba78..9414dc1b99 100644
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--- a/include/grub/at_keyboard.h
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+++ b/include/grub/at_keyboard.h
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@@ -19,6 +19,10 @@
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#ifndef GRUB_AT_KEYBOARD_HEADER
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#define GRUB_AT_KEYBOARD_HEADER 1
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+/*
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+ * Refer to https://wiki.osdev.org/%228042%22_PS/2_Controller for details.
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+ */
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+
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/* Used for sending commands to the controller. */
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#define KEYBOARD_COMMAND_ISREADY(x) !((x) & 0x02)
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#define KEYBOARD_COMMAND_READ 0x20
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