diff options
| author | Simon Glass <sjg@chromium.org> | 2021-12-29 11:57:37 -0700 |
|---|---|---|
| committer | Heinrich Schuchardt <heinrich.schuchardt@canonical.com> | 2021-12-31 06:45:01 +0100 |
| commit | 299606611055075daef60be250eec80cd337a141 (patch) | |
| tree | 5c50f4781655859419df9405a71e57a27d2aeb6e | |
| parent | 613cd0c46796cae340382679bc01ef220daf3768 (diff) | |
| download | u-boot-299606611055075daef60be250eec80cd337a141.zip u-boot-299606611055075daef60be250eec80cd337a141.tar.gz u-boot-299606611055075daef60be250eec80cd337a141.tar.bz2 | |
efi: serial: Support arrow keys
At present only the backspace key is supported in U-Boot, when running as
an EFI app. Add support for arrows, home and end as well, to make the CLI
more friendly.
Signed-off-by: Simon Glass <sjg@chromium.org>
Acked-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
| -rw-r--r-- | drivers/serial/serial_efi.c | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/drivers/serial/serial_efi.c b/drivers/serial/serial_efi.c index 33ddbd6..0067576 100644 --- a/drivers/serial/serial_efi.c +++ b/drivers/serial/serial_efi.c @@ -24,6 +24,9 @@ struct serial_efi_priv { bool have_key; }; +/* Convert a lower-case character to its ctrl-char equivalent */ +#define CTL_CH(c) ((c) - 'a' + 1) + int serial_efi_setbrg(struct udevice *dev, int baudrate) { return 0; @@ -49,6 +52,7 @@ 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); @@ -63,8 +67,11 @@ static int serial_efi_getc(struct udevice *dev) * key scan code of 8. Handle this so that backspace works correctly * in the U-Boot command line. */ - if (!ch && priv->key.scan_code == 8) - ch = 8; + 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); return ch; |