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| author | Allen Martin <amartin@nvidia.com> | 2012-11-06 13:26:03 -0800 |
|---|---|---|
| committer | Marek Vasut <marex@denx.de> | 2012-11-20 00:16:06 +0100 |
| commit | 4151a400cfcd4762ca422a04890cd5869bac155c (patch) | |
| tree | d9d752c63ec145953b8fc685a28b00a6fe3e1622 | |
| parent | 5ddcc38bee7c4e58197ff8de7919aca2532a8e03 (diff) | |
| download | u-boot-imx-4151a400cfcd4762ca422a04890cd5869bac155c.zip u-boot-imx-4151a400cfcd4762ca422a04890cd5869bac155c.tar.gz u-boot-imx-4151a400cfcd4762ca422a04890cd5869bac155c.tar.bz2 | |
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>
| -rw-r--r-- | common/usb_kbd.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/common/usb_kbd.c b/common/usb_kbd.c index 24467ce..4efbcfe 100644 --- a/common/usb_kbd.c +++ b/common/usb_kbd.c @@ -94,6 +94,15 @@ static const unsigned char usb_kbd_num_keypad[] = { }; /* + * 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]; |