Input: wacom - separate pen from express keys on Graphire

Since Graphire/Bamboo devices report pen and expresskeys in the same
data packet, we need to send a input_sync event to separate pen data
from expresskeys for X11 driver to process them properly.

Signed-off-by: Ping Cheng <pingc@wacom.com>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>

1 files changed, 23 insertions, 4 deletions

diff --git a/drivers/input/tablet/wacom_wac.c b/drivers/input/tablet/wacom_wac.c
index e4e8c3636940..1056f149fe31 100644
--- a/drivers/input/tablet/wacom_wac.c
+++ b/drivers/input/tablet/wacom_wac.c
@@ -154,6 +154,7 @@ static int wacom_graphire_irq(struct wacom_wac *wacom, void *wcombo)
 {
         unsigned char *data = wacom->data;
         int x, y, rw;
+        static int penData = 0;
 
         if (data[0] != WACOM_REPORT_PENABLED) {
                 dbg("wacom_graphire_irq: received unknown report #%d", data[0]);
@@ -162,6 +163,7 @@ static int wacom_graphire_irq(struct wacom_wac *wacom, void *wcombo)
 
         if (data[1] & 0x80) {
                 /* in prox and not a pad data */
+                penData = 1;
 
                 switch ((data[1] >> 5) & 3) {
 
@@ -231,7 +233,11 @@ static int wacom_graphire_irq(struct wacom_wac *wacom, void *wcombo)
         switch (wacom->features->type) {
             case WACOM_G4:
                 if (data[7] & 0xf8) {
-                        wacom_input_sync(wcombo); /* sync last event */
+                        if (penData) {
+                                wacom_input_sync(wcombo); /* sync last event */
+                                if (!wacom->id[0])
+                                        penData = 0;
+                        }
                         wacom->id[1] = PAD_DEVICE_ID;
                         wacom_report_key(wcombo, BTN_0, (data[7] & 0x40));
                         wacom_report_key(wcombo, BTN_4, (data[7] & 0x80));
@@ -241,10 +247,15 @@ static int wacom_graphire_irq(struct wacom_wac *wacom, void *wcombo)
                         wacom_report_abs(wcombo, ABS_MISC, wacom->id[1]);
                         wacom_input_event(wcombo, EV_MSC, MSC_SERIAL, 0xf0);
                 } else if (wacom->id[1]) {
-                        wacom_input_sync(wcombo); /* sync last event */
+                        if (penData) {
+                                wacom_input_sync(wcombo); /* sync last event */
+                                if (!wacom->id[0])
+                                        penData = 0;
+                        }
                         wacom->id[1] = 0;
                         wacom_report_key(wcombo, BTN_0, (data[7] & 0x40));
                         wacom_report_key(wcombo, BTN_4, (data[7] & 0x80));
+                        wacom_report_rel(wcombo, REL_WHEEL, 0);
                         wacom_report_key(wcombo, BTN_TOOL_FINGER, 0);
                         wacom_report_abs(wcombo, ABS_MISC, 0);
                         wacom_input_event(wcombo, EV_MSC, MSC_SERIAL, 0xf0);
@@ -252,7 +263,11 @@ static int wacom_graphire_irq(struct wacom_wac *wacom, void *wcombo)
                 break;
             case WACOM_MO:
                 if ((data[7] & 0xf8) || (data[8] & 0xff)) {
-                        wacom_input_sync(wcombo); /* sync last event */
+                        if (penData) {
+                                wacom_input_sync(wcombo); /* sync last event */
+                                if (!wacom->id[0])
+                                        penData = 0;
+                        }
                         wacom->id[1] = PAD_DEVICE_ID;
                         wacom_report_key(wcombo, BTN_0, (data[7] & 0x08));
                         wacom_report_key(wcombo, BTN_1, (data[7] & 0x20));
@@ -263,7 +278,11 @@ static int wacom_graphire_irq(struct wacom_wac *wacom, void *wcombo)
                         wacom_report_abs(wcombo, ABS_MISC, wacom->id[1]);
                         wacom_input_event(wcombo, EV_MSC, MSC_SERIAL, 0xf0);
                 } else if (wacom->id[1]) {
-                        wacom_input_sync(wcombo); /* sync last event */
+                        if (penData) {
+                                wacom_input_sync(wcombo); /* sync last event */
+                                if (!wacom->id[0])
+                                        penData = 0;
+                        }
                         wacom->id[1] = 0;
                         wacom_report_key(wcombo, BTN_0, (data[7] & 0x08));
                         wacom_report_key(wcombo, BTN_1, (data[7] & 0x20));