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usb: kbd: implement special keys

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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>
This commit is contained in:
Heinrich Schuchardt 2019-11-23 18:15:21 +01:00 committed by Marek Vasut
parent 3352c2114b
commit 87e91bccae
2 changed files with 48 additions and 0 deletions
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42
common/usb_kbd.c
View File

@ -76,7 +76,11 @@ static const unsigned char usb_kbd_num_keypad[] = {
};
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 @@ static int usb_kbd_translate(struct usb_kbd_pdata *data, unsigned char scancode,
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 @@ static int usb_kbd_translate(struct usb_kbd_pdata *data, unsigned char scancode,
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)

6
drivers/usb/Kconfig
View File

@ -100,6 +100,12 @@ config USB_KEYBOARD
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