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ECMA-48 (or withdrawn ANSI 3.64) escape sequences.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>

diff --git a/drivers/input/input.c b/drivers/input/input.c
index da264f4..c1c5e42 100644 (file)
--- a/drivers/input/input.c
+++ b/drivers/input/input.c
@@ -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 The same sequences exist in the withdrawn ANSI 3.64 standard.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) {