Input: wacom - Bamboo One 1024 pressure fix

commit 6dc463511d4a690f01a9248df3b384db717e0b1c upstream.

Bamboo One's with ID of 0x6a and 0x6b were added with correct
indication of 1024 pressure levels but the Graphire packet routine
was only looking at 9 bits.  Increased to 10 bits.

This bug caused these devices to roll over to zero pressure at half
way mark.

The other devices using this routine only support 256 or 512 range
and look to fix unused bits at zero.

Signed-off-by: Chris Bagwell <chris@cnpbagwell.com>
Reported-by: Tushant Mirchandani <tushantin@gmail.com>
Reviewed-by: Ping Cheng <pingc@wacom.com>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/input/tablet/wacom_wac.c b/drivers/input/tablet/wacom_wac.c
index 08ba5ad9c9be76a232effefffd6dba4fd7be0429..a28ebf08560c26a85a761d5474c9a175074b11e4 100644 (file)
--- a/drivers/input/tablet/wacom_wac.c
+++ b/drivers/input/tablet/wacom_wac.c
@@ -242,7 +242,7 @@ static int wacom_graphire_irq(struct wacom_wac *wacom)
                input_report_abs(input, ABS_X, le16_to_cpup((__le16 *)&data[2]));
                input_report_abs(input, ABS_Y, le16_to_cpup((__le16 *)&data[4]));
                if (wacom->tool[0] != BTN_TOOL_MOUSE) {
-                       input_report_abs(input, ABS_PRESSURE, data[6] | ((data[7] & 0x01) << 8));
+                       input_report_abs(input, ABS_PRESSURE, data[6] | ((data[7] & 0x03) << 8));
                        input_report_key(input, BTN_TOUCH, data[1] & 0x01);
                        input_report_key(input, BTN_STYLUS, data[1] & 0x02);
                        input_report_key(input, BTN_STYLUS2, data[1] & 0x04);