USB HID: Add ID for eGalax Multitouch used in JooJoo tablet

The JooJoo tablet (http://thejoojoo.com/) contains an "eGalax Inc. USB
TouchController", and this patch hooks it up to the egalax-touch driver.
Without the patch we don't get any cursor motion, since it comes through
Z/RX rather than X/Y.

(The egalax-touch driver does not yet generate a correct event sequence
for the "serial" protocol used by this device, though -- see the note
added to the code, which comes from research by Stéphane Chatty.)

Cc: Jiri Kosina <jkosina@suse.cz>
Cc: Stéphane Chatty <chatty@enac.fr>
Signed-off-by: Chris Ball <cjb@laptop.org>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>

diff --git a/drivers/hid/hid-core.c b/drivers/hid/hid-core.c
index e635199..0c52899 100644 (file)
--- a/drivers/hid/hid-core.c
+++ b/drivers/hid/hid-core.c
@@ -1299,6 +1299,7 @@ static const struct hid_device_id hid_blacklist[] = {
        { HID_USB_DEVICE(USB_VENDOR_ID_CYPRESS, USB_DEVICE_ID_CYPRESS_MOUSE) },
        { HID_USB_DEVICE(USB_VENDOR_ID_DRAGONRISE, 0x0006) },
        { HID_USB_DEVICE(USB_VENDOR_ID_DWAV, USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH) },
+       { HID_USB_DEVICE(USB_VENDOR_ID_DWAV, USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH1) },
        { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_ELECOM, USB_DEVICE_ID_ELECOM_BM084) },
        { HID_USB_DEVICE(USB_VENDOR_ID_EZKEY, USB_DEVICE_ID_BTC_8193) },
        { HID_USB_DEVICE(USB_VENDOR_ID_GAMERON, USB_DEVICE_ID_GAMERON_DUAL_PSX_ADAPTOR) },

diff --git a/drivers/hid/hid-egalax.c b/drivers/hid/hid-egalax.c
index f44bdc0..8ca7f65 100644 (file)
--- a/drivers/hid/hid-egalax.c
+++ b/drivers/hid/hid-egalax.c
@@ -159,6 +159,13 @@ static int egalax_event(struct hid_device *hid, struct hid_field *field,
 {
        struct egalax_data *td = hid_get_drvdata(hid);
 
+       /* Note, eGalax has two product lines: the first is resistive and
+        * uses a standard parallel multitouch protocol (product ID ==
+        * 48xx).  The second is capacitive and uses an unusual "serial"
+        * protocol with a different message for each multitouch finger
+        * (product ID == 72xx).  We do not yet generate a correct event
+        * sequence for the capacitive/serial protocol.
+        */
        if (hid->claimed & HID_CLAIMED_INPUT) {
                struct input_dev *input = field->hidinput->input;
 
@@ -246,6 +253,8 @@ static void egalax_remove(struct hid_device *hdev)
 static const struct hid_device_id egalax_devices[] = {
        { HID_USB_DEVICE(USB_VENDOR_ID_DWAV,
                        USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH) },
+       { HID_USB_DEVICE(USB_VENDOR_ID_DWAV,
+                       USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH1) },
        { }
 };
 MODULE_DEVICE_TABLE(hid, egalax_devices);

diff --git a/drivers/hid/hid-ids.h b/drivers/hid/hid-ids.h
index d3fc13a..85c6d13 100644 (file)
--- a/drivers/hid/hid-ids.h
+++ b/drivers/hid/hid-ids.h
@@ -188,6 +188,7 @@
 #define USB_VENDOR_ID_DWAV             0x0eef
 #define USB_DEVICE_ID_EGALAX_TOUCHCONTROLLER   0x0001
 #define USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH   0x480d
+#define USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH1  0x720c
 
 #define USB_VENDOR_ID_ELECOM           0x056e
 #define USB_DEVICE_ID_ELECOM_BM084     0x0061