HID: multitouch: correct eGalax a001 protocol

This device use another protocol while sending the events.
It's the same as the one described as "serial" by Microsoft.
We are keeping here the sn_move and sn_pressure parameters for
egalax devices.

CC: Cedric Sodhi <manday@gmx.net>
CC: Chris Bagwell <chris@cnpbagwell.com>
Signed-off-by: Benjamin Tissoires <benjamin.tissoires@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>

1 files changed, 8 insertions, 1 deletions

diff --git a/drivers/hid/hid-multitouch.c b/drivers/hid/hid-multitouch.c
index fd2fa5977831..26e9706eedf5 100644
--- a/drivers/hid/hid-multitouch.c
+++ b/drivers/hid/hid-multitouch.c
@@ -97,6 +97,7 @@ struct mt_device {
 #define MT_CLS_3M                               0x0101
 #define MT_CLS_CYPRESS                          0x0102
 #define MT_CLS_EGALAX                           0x0103
+#define MT_CLS_EGALAX_SERIAL                    0x0104
 
 #define MT_DEFAULT_MAXCONTACT   10
 
@@ -174,6 +175,12 @@ struct mt_class mt_classes[] = {
                 .sn_move = 4096,
                 .sn_pressure = 32,
         },
+        { .name = MT_CLS_EGALAX_SERIAL,
+                .quirks =  MT_QUIRK_SLOT_IS_CONTACTID |
+                        MT_QUIRK_ALWAYS_VALID,
+                .sn_move = 4096,
+                .sn_pressure = 32,
+        },
 
         { }
 };
@@ -705,7 +712,7 @@ static const struct hid_device_id mt_devices[] = {
         { .driver_data = MT_CLS_EGALAX,
                 HID_USB_DEVICE(USB_VENDOR_ID_DWAV,
                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7302) },
-        { .driver_data = MT_CLS_EGALAX,
+        { .driver_data = MT_CLS_EGALAX_SERIAL,
                 HID_USB_DEVICE(USB_VENDOR_ID_DWAV,
                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_A001) },