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[console] Handle remapping of scancode 86

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The key with scancode 86 appears in the position between left shift
and Z on a US keyboard, where it typically fails to exist entirely.
Most US keyboard maps define this nonexistent key as generating "\|",
with the notable exception of "loadkeys" which instead reports it as
generating "<>".  Both of these mapping choices duplicate keys that
exist elsewhere in the map, which causes problems for our ASCII-based
remapping mechanism.

Work around these quirks by treating the key as generating "\|" with
the high bit set, and making it subject to remapping.  Where the BIOS
generates "\|" as expected, this allows us to remap to the correct
ASCII value.

Signed-off-by: Michael Brown <mcb30@ipxe.org>
This commit is contained in:
Michael Brown
2022-02-09 15:43:42 +00:00
parent 3f05a82fec
commit 0bbd896783
28 changed files with 93 additions and 6 deletions
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8
src/drivers/usb/usbkbd.c
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@@ -114,13 +114,19 @@ static unsigned int usbkbd_map ( unsigned int keycode, unsigned int modifiers,
};
key = keypad[ keycode - USBKBD_KEY_PAD_1 ];
};
} else if ( keycode == USBKBD_KEY_NON_US ) {
/* Non-US \ and | */
key = ( ( modifiers & USBKBD_SHIFT ) ?
( KEYMAP_PSEUDO | '|' ) : ( KEYMAP_PSEUDO | '\\' ) );
} else {
key = 0;
}
/* Remap key if applicable */
if ( keycode < USBKBD_KEY_CAPS_LOCK )
if ( ( keycode < USBKBD_KEY_CAPS_LOCK ) ||
( keycode == USBKBD_KEY_NON_US ) ) {
key = key_remap ( key );
}
/* Handle upper/lower case and Ctrl-<key> */
if ( islower ( key ) ) {