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By default, only enable USB keyboard detection when booted in UEFI mode.

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Most legacy BIOSs will support USB legacy keyboard emulation. Using that
will avoid having to reserve memory for the USB drivers, and should
improve the chance of having a working keyboard without having to work
around various USB device quirks.
This commit is contained in:
Martin Whitaker
2022-07-24 13:56:41 +01:00
parent 740df34656
commit 13d9569041
4 changed files with 23 additions and 7 deletions
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14
system/keyboard.c
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@@ -3,6 +3,8 @@
#include <stdint.h>
#include "bootparams.h"
#include "io.h"
#include "usbhcd.h"
@@ -212,7 +214,7 @@ static const char usb_hid_keymap[] = {
// Public Variables
//------------------------------------------------------------------------------
keyboard_types_t keyboard_types = KT_LEGACY | KT_USB;
keyboard_types_t keyboard_types = KT_NONE;
//------------------------------------------------------------------------------
// Public Functions
@@ -220,6 +222,16 @@ keyboard_types_t keyboard_types = KT_LEGACY | KT_USB;
void keyboard_init(void)
{
if (keyboard_types == KT_NONE) {
// No command line option was found, so set the default according to
// how we were booted.
const boot_params_t *boot_params = (boot_params_t *)boot_params_addr;
if (boot_params->efi_info.loader_signature != 0) {
keyboard_types = KT_USB|KT_LEGACY;
} else {
keyboard_types = KT_LEGACY;
}
}
if (keyboard_types & KT_USB) {
find_usb_keyboards(keyboard_types == KT_USB);
}