linux-kernel - [PATCH] [96/139] Input: synaptics - fix handling of 2-button ClickPads

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Date:	Tue,  1 Feb 2011 16:44:54 -0800 (PST)
From:	Andi Kleen <andi@...stfloor.org>
To:	yan.i.li@...el.com, dtor@...l.ru, gregkh@...e.de,
	ak@...ux.intel.com, linux-kernel@...r.kernel.org, stable@...nel.org
Subject: [PATCH] [96/139] Input: synaptics - fix handling of 2-button ClickPads

2.6.35-longterm review patch.  If anyone has any objections, please let me know.

------------------
From: Yan Li <yan.i.li@...el.com>

commit 3bfa321e662edf90fb8123a02c987c2965fa50bb upstream.

Lenovo S10-3t's ClickPad is a 2-button ClickPad that reports BTN_LEFT
and BTN_RIGHT as normal touchpad, unlike the 1-button ClickPad used in
HP mini 210 that reports solely BTN_MIDDLE.

In 0xc0-cap response, the 1-button ClickPad has the 20-bit set while
2-button ClickPad has the 8-bit set.

This patch makes the kernel only handle 1-button ClickPad specially,
and treat 2-button ClickPad in the same fashion as regular touchpads.

This fixes kernel bug #18122 and MeeGo bug #4807.

Signed-off-by: Yan Li <yan.i.li@...el.com>
Signed-off-by: Dmitry Torokhov <dtor@...l.ru>
Signed-off-by: Greg Kroah-Hartman <gregkh@...e.de>
Signed-off-by: Andi Kleen <ak@...ux.intel.com>

---
 drivers/input/mouse/synaptics.h |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

Index: linux-2.6.35.y/drivers/input/mouse/synaptics.h
===================================================================
--- linux-2.6.35.y.orig/drivers/input/mouse/synaptics.h
+++ linux-2.6.35.y/drivers/input/mouse/synaptics.h
@@ -51,7 +51,8 @@
 #define SYN_EXT_CAP_REQUESTS(c)		(((c) & 0x700000) >> 20)
 #define SYN_CAP_MULTI_BUTTON_NO(ec)	(((ec) & 0x00f000) >> 12)
 #define SYN_CAP_PRODUCT_ID(ec)		(((ec) & 0xff0000) >> 16)
-#define SYN_CAP_CLICKPAD(ex0c)		((ex0c) & 0x100100)
+#define SYN_CAP_CLICKPAD(ex0c)		((ex0c) & 0x100000) /* 1-button ClickPad */
+#define SYN_CAP_CLICKPAD2BTN(ex0c)	((ex0c) & 0x000100) /* 2-button ClickPad */
 #define SYN_CAP_MAX_DIMENSIONS(ex0c)	((ex0c) & 0x020000)
 
 /* synaptics modes query bits */
--
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