usb: kbd: implement special keys
Provide support for F1-F12, Insert, Delete, Home, End, Page Up, Page Down.
As this leads to a size increase provide a customizing setting
CONFIG_USB_KEYBOARD_FN_KEYS.
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
diff --git a/common/usb_kbd.c b/common/usb_kbd.c
index d177b97..d6b340b 100644
--- a/common/usb_kbd.c
+++ b/common/usb_kbd.c
@@ -76,7 +76,11 @@
};
static const u8 usb_special_keys[] = {
+#ifdef CONFIG_USB_KEYBOARD_FN_KEYS
+ '2', 'H', '5', '3', 'F', '6', 'C', 'D', 'B', 'A'
+#else
'C', 'D', 'B', 'A'
+#endif
};
/*
@@ -233,6 +237,43 @@
return 0;
}
+#ifdef CONFIG_USB_KEYBOARD_FN_KEYS
+ if (scancode < 0x3a || scancode > 0x52 ||
+ scancode == 0x46 || scancode == 0x47)
+ return 1;
+
+ usb_kbd_put_queue(data, 0x1b);
+ if (scancode < 0x3e) {
+ /* F1 - F4 */
+ usb_kbd_put_queue(data, 0x4f);
+ usb_kbd_put_queue(data, scancode - 0x3a + 'P');
+ return 0;
+ }
+ usb_kbd_put_queue(data, '[');
+ if (scancode < 0x42) {
+ /* F5 - F8 */
+ usb_kbd_put_queue(data, '1');
+ if (scancode == 0x3e)
+ --scancode;
+ keycode = scancode - 0x3f + '7';
+ } else if (scancode < 0x49) {
+ /* F9 - F12 */
+ usb_kbd_put_queue(data, '2');
+ if (scancode > 0x43)
+ ++scancode;
+ keycode = scancode - 0x42 + '0';
+ } else {
+ /*
+ * INSERT, HOME, PAGE UP, DELETE, END, PAGE DOWN,
+ * RIGHT, LEFT, DOWN, UP
+ */
+ keycode = usb_special_keys[scancode - 0x49];
+ }
+ usb_kbd_put_queue(data, keycode);
+ if (scancode < 0x4f && scancode != 0x4a && scancode != 0x4d)
+ usb_kbd_put_queue(data, '~');
+ return 0;
+#else
/* Left, Right, Up, Down */
if (scancode > 0x4e && scancode < 0x53) {
usb_kbd_put_queue(data, 0x1b);
@@ -241,6 +282,7 @@
return 0;
}
return 1;
+#endif /* CONFIG_USB_KEYBOARD_FN_KEYS */
}
static uint32_t usb_kbd_service_key(struct usb_device *dev, int i, int up)
diff --git a/drivers/usb/Kconfig b/drivers/usb/Kconfig
index 9af78e8..bea4a92 100644
--- a/drivers/usb/Kconfig
+++ b/drivers/usb/Kconfig
@@ -100,6 +100,12 @@
if USB_KEYBOARD
+config USB_KEYBOARD_FN_KEYS
+ bool "USB keyboard function key support"
+ help
+ Say Y here if you want support for keys F1 - F12, INS, HOME, DELETE,
+ END, PAGE UP, and PAGE DOWN.
+
choice
prompt "USB keyboard polling"
default SYS_USB_EVENT_POLL