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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 <amartin@nvidia.com>
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@ -93,6 +93,15 @@ static const unsigned char usb_kbd_num_keypad[] = {
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'.', 0, 0, 0, '='
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'.', 0, 0, 0, '='
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};
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};
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/*
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* map arrow keys to ^F/^B ^N/^P, can't really use the proper
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* ANSI sequence for arrow keys because the queuing code breaks
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* when a single keypress expands to 3 queue elements
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*/
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static const unsigned char usb_kbd_arrow[] = {
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0x6, 0x2, 0xe, 0x10
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};
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/*
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/*
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* NOTE: It's important for the NUM, CAPS, SCROLL-lock bits to be in this
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* NOTE: It's important for the NUM, CAPS, SCROLL-lock bits to be in this
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* order. See usb_kbd_setled() function!
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* order. See usb_kbd_setled() function!
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@ -224,6 +233,10 @@ static int usb_kbd_translate(struct usb_kbd_pdata *data, unsigned char scancode,
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keycode = usb_kbd_numkey[scancode - 0x1e];
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keycode = usb_kbd_numkey[scancode - 0x1e];
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}
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}
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/* Arrow keys */
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if ((scancode >= 0x4f) && (scancode <= 0x52))
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keycode = usb_kbd_arrow[scancode - 0x4f];
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/* Numeric keypad */
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/* Numeric keypad */
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if ((scancode >= 0x54) && (scancode <= 0x67))
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if ((scancode >= 0x54) && (scancode <= 0x67))
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keycode = usb_kbd_num_keypad[scancode - 0x54];
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keycode = usb_kbd_num_keypad[scancode - 0x54];
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