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efi: Move key decoding into a shared file

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Create a new file in lib/efi to handle conversion of keys from EFI
format to characters, so we can use it from multiple places. Update the
serial_efi driver accordingly.

Signed-off-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Simon Glass
2025-09-24 16:01:02 -06:00
parent c5606411f1
commit 4113d6a01c
4 changed files with 74 additions and 14 deletions
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15
drivers/serial/serial_efi.c
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@@ -73,7 +73,6 @@ static int serial_efi_get_key(struct serial_efi_priv *priv)
static int serial_efi_getc(struct udevice *dev)
{
struct serial_efi_priv *priv = dev_get_priv(dev);
char conv_scan[10] = {0, 'p', 'n', 'f', 'b', 'a', 'e', 0, 8};
int ret, ch;
ret = serial_efi_get_key(priv);
@@ -81,19 +80,7 @@ static int serial_efi_getc(struct udevice *dev)
return ret;
priv->have_key = false;
ch = priv->key.unicode_char;
/*
* Unicode char 8 (for backspace) is never returned. Instead we get a
* key scan code of 8. Handle this so that backspace works correctly
* in the U-Boot command line.
*/
if (!ch && priv->key.scan_code < sizeof(conv_scan)) {
ch = conv_scan[priv->key.scan_code];
if (ch >= 'a')
ch -= 'a' - 1;
}
debug(" [%x %x %x] ", ch, priv->key.unicode_char, priv->key.scan_code);
ch = efi_decode_key(&priv->key);
return ch;
}