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input: add support for FN1 - FN10 on crosswire kbd 

Chromebooks and the sandbox use a crosswire keyboard with function keys
FN1 - FN10. These keys are needed when running UEFI applications like GRUB
or the UEFI SCT.

Add support for these keys when translating from key codes to
ECMA-48 (or withdrawn ANSI 3.64) escape sequences.

All escape sequences start with 0x1b. So we should not repeat this
byte in the kbd_to_ansi364 table.

For testing use:

sandbox_defconfig + CONFIG_EFI_SELFTEST=y

$ ./u-boot -D -l

=> setenv efi_selftest extended text input
=> bootefi selftest

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Reviewed-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Heinrich Schuchardt 2020-10-23 20:52:26 +02:00
parent 2fb3ed2cbc
commit b055a05b98
1 changed files with 25 additions and 10 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

35
drivers/input/input.c
View File

@ -170,21 +170,35 @@ static struct kbd_entry {
};
/*
* Scan key code to ANSI 3.64 escape sequence table. This table is
* incomplete in that it does not include all possible extra keys.
* The table contains conversions from scan key codes to ECMA-48 escape
* sequences. The same sequences exist in the withdrawn ANSI 3.64 standard.
*
* As all escape sequences start with 0x1b this byte has been removed.
*
* This table is incomplete in that it does not include all possible extra keys.
*/
static struct {
int kbd_scan_code;
char *escape;
} kbd_to_ansi364[] = {
{ KEY_UP, "\033[A"},
{ KEY_DOWN, "\033[B"},
{ KEY_RIGHT, "\033[C"},
{ KEY_LEFT, "\033[D"},
{ KEY_UP, "[A"},
{ KEY_LEFT, "[D"},
{ KEY_RIGHT, "[C"},
{ KEY_DOWN, "[B"},
{ KEY_F1, "OP"},
{ KEY_F2, "OQ"},
{ KEY_F3, "OR"},
{ KEY_F4, "OS"},
{ KEY_F5, "[15~"},
{ KEY_F6, "[17~"},
{ KEY_F7, "[18~"},
{ KEY_F8, "[19~"},
{ KEY_F9, "[20~"},
{ KEY_F10, "[21~"},
};
/* Maximum number of output characters that an ANSI sequence expands to */
#define ANSI_CHAR_MAX 3
#define ANSI_CHAR_MAX 5
static int input_queue_ascii(struct input_config *config, int ch)
{
@ -417,6 +431,7 @@ static int input_keycode_to_ansi364(struct input_config *config,
for (i = ch_count = 0; i < ARRAY_SIZE(kbd_to_ansi364); i++) {
if (keycode != kbd_to_ansi364[i].kbd_scan_code)
continue;
output_ch[ch_count++] = 0x1b;
for (escape = kbd_to_ansi364[i].escape; *escape; escape++) {
if (ch_count < max_chars)
output_ch[ch_count] = *escape;
@ -473,7 +488,7 @@ static int input_keycodes_to_ascii(struct input_config *config,
/* Start conversion by looking for the first new keycode (by same). */
for (i = same; i < num_keycodes; i++) {
int key = keycode[i];
int ch;
int ch = 0xff;
/*
* For a normal key (with an ASCII value), add it; otherwise
@ -492,10 +507,10 @@ static int input_keycodes_to_ascii(struct input_config *config,
}
if (ch_count < max_chars && ch != 0xff)
output_ch[ch_count++] = (uchar)ch;
} else {
}
if (ch == 0xff)
ch_count += input_keycode_to_ansi364(config, key,
output_ch, max_chars);
}
}
if (ch_count > max_chars) {