Input: Add support of Synaptics Clickpad device

The new type of touchpads can be detected via a new query command
0x0c. The clickpad flags are in cap[0]:4 and cap[1]:0 bits.

When the device is detected, the driver now reports only the left
button as the supported buttons so that X11 driver can detect that
the device is Clickpad. A Clickpad device gives the button events
only as the middle button. The kernel driver morphs to the left
button. The real handling of Clickpad is done rather in X driver
side.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>

1 files changed, 4 insertions, 0 deletions

diff --git a/drivers/input/mouse/synaptics.h b/drivers/input/mouse/synaptics.h
index f0f40a331dc8..ae37c5d162a4 100644
--- a/drivers/input/mouse/synaptics.h
+++ b/drivers/input/mouse/synaptics.h
@@ -18,6 +18,7 @@
 #define SYN_QUE_SERIAL_NUMBER_SUFFIX    0x07
 #define SYN_QUE_RESOLUTION              0x08
 #define SYN_QUE_EXT_CAPAB               0x09
+#define SYN_QUE_EXT_CAPAB_0C            0x0c
 
 /* synatics modes */
 #define SYN_BIT_ABSOLUTE_MODE           (1 << 7)
@@ -48,6 +49,8 @@
 #define SYN_CAP_VALID(c)                ((((c) & 0x00ff00) >> 8) == 0x47)
 #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)
 
 /* synaptics modes query bits */
 #define SYN_MODE_ABSOLUTE(m)            ((m) & (1 << 7))
@@ -96,6 +99,7 @@ struct synaptics_data {
         unsigned long int model_id;             /* Model-ID */
         unsigned long int capabilities;         /* Capabilities */
         unsigned long int ext_cap;              /* Extended Capabilities */
+        unsigned long int ext_cap_0c;           /* Ext Caps from 0x0c query */
         unsigned long int identity;             /* Identification */
         int x_res;                              /* X resolution in units/mm */
         int y_res;                              /* Y resolution in units/mm */