From 4151a400cfcd4762ca422a04890cd5869bac155c Mon Sep 17 00:00:00 2001 From: Allen Martin Date: Tue, 6 Nov 2012 13:26:03 -0800 Subject: [PATCH] USB: add arrow key support to usb_kbd Check for scancodes for arrow keys and map them to ^F/^B, ^N/^P. Control characters are used instead of ANSI sequence because the queueing code in usb_kbd doesn't handle the data increase when one keypress generates 3 keycodes. The real fix is to convert this driver to use the input subsystem and queue, but this allows arrow keys to work until this driver is converted. Signed-off-by: Allen Martin --- common/usb_kbd.c | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/common/usb_kbd.c b/common/usb_kbd.c index 24467cec14..4efbcfe90d 100644 --- a/common/usb_kbd.c +++ b/common/usb_kbd.c @@ -93,6 +93,15 @@ static const unsigned char usb_kbd_num_keypad[] = { '.', 0, 0, 0, '=' }; +/* + * map arrow keys to ^F/^B ^N/^P, can't really use the proper + * ANSI sequence for arrow keys because the queuing code breaks + * when a single keypress expands to 3 queue elements + */ +static const unsigned char usb_kbd_arrow[] = { + 0x6, 0x2, 0xe, 0x10 +}; + /* * NOTE: It's important for the NUM, CAPS, SCROLL-lock bits to be in this * order. See usb_kbd_setled() function! @@ -224,6 +233,10 @@ static int usb_kbd_translate(struct usb_kbd_pdata *data, unsigned char scancode, keycode = usb_kbd_numkey[scancode - 0x1e]; } + /* Arrow keys */ + if ((scancode >= 0x4f) && (scancode <= 0x52)) + keycode = usb_kbd_arrow[scancode - 0x4f]; + /* Numeric keypad */ if ((scancode >= 0x54) && (scancode <= 0x67)) keycode = usb_kbd_num_keypad[scancode - 0x54]; -- 2.25.1