Input: wacom - wireless monitor framework

The 3rd gen Bamboo Pen & Touch and Intuos5 tablets support an
optional wireless module. When its receiver is plugged into USB,
it presents 3 interfaces: 0) Monitor 1) Pen and 2) Touch.

The exact capabilities of the Pen and Touch interfaces can
not be determined until a tablet connection is established
and reported over the Monitor interface.

This patch detects this wireless receiver and enables interrupt
packets to be processed for the Monitor interface. Processing
the data in packets will be left to another patch.

Since it doesn't make sense to create an input device for the
Monitor interface, it is not created. Creation of Pen and Touch
input device is also delayed until monitor packets can be processed.

Signed-off-by: Chris Bagwell <chris@cnpbagwell.com>
Tested-by: Jason Gerecke <killertofu@gmail.com>
Acked-by: Ping Cheng <pingc@wacom.com>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>

1 files changed, 27 insertions, 1 deletions

diff --git a/drivers/input/tablet/wacom_wac.c b/drivers/input/tablet/wacom_wac.c
index 07a1f218b5c..6264e6a8d51 100644
--- a/drivers/input/tablet/wacom_wac.c
+++ b/drivers/input/tablet/wacom_wac.c
@@ -1044,6 +1044,14 @@ static int wacom_bpt_irq(struct wacom_wac *wacom, size_t len)
         return 0;
 }
 
+static int wacom_wireless_irq(struct wacom_wac *wacom, size_t len)
+{
+        if (len != WACOM_PKGLEN_WIRELESS)
+                return 0;
+
+        return 0;
+}
+
 void wacom_wac_irq(struct wacom_wac *wacom_wac, size_t len)
 {
         bool sync;
@@ -1094,6 +1102,10 @@ void wacom_wac_irq(struct wacom_wac *wacom_wac, size_t len)
                 sync = wacom_bpt_irq(wacom_wac, len);
                 break;
 
+        case WIRELESS:
+                sync = wacom_wireless_irq(wacom_wac, len);
+                break;
+
         default:
                 sync = false;
                 break;
@@ -1155,7 +1167,7 @@ void wacom_setup_device_quirks(struct wacom_features *features)
 
         /* these device have multiple inputs */
         if (features->type == TABLETPC || features->type == TABLETPC2FG ||
-            features->type == BAMBOO_PT)
+            features->type == BAMBOO_PT || features->type == WIRELESS)
                 features->quirks |= WACOM_QUIRK_MULTI_INPUT;
 
         /* quirk for bamboo touch with 2 low res touches */
@@ -1167,6 +1179,16 @@ void wacom_setup_device_quirks(struct wacom_features *features)
                 features->y_fuzz <<= 5;
                 features->quirks |= WACOM_QUIRK_BBTOUCH_LOWRES;
         }
+
+        if (features->type == WIRELESS) {
+
+                /* monitor never has input and pen/touch have delayed create */
+                features->quirks |= WACOM_QUIRK_NO_INPUT;
+
+                /* must be monitor interface if no device_type set */
+                if (!features->device_type)
+                        features->quirks |= WACOM_QUIRK_MONITOR;
+        }
 }
 
 static unsigned int wacom_calculate_touch_res(unsigned int logical_max,
@@ -1640,6 +1662,9 @@ static const struct wacom_features wacom_features_0xEC =
 static const struct wacom_features wacom_features_0x47 =
         { "Wacom Intuos2 6x8",    WACOM_PKGLEN_INTUOS,    20320, 16240, 1023,
           31, INTUOS, WACOM_INTUOS_RES, WACOM_INTUOS_RES };
+static const struct wacom_features wacom_features_0x84 =
+        { "Wacom Wireless Receiver", WACOM_PKGLEN_WIRELESS, 0, 0, 0,
+          0, WIRELESS, 0, 0 };
 static const struct wacom_features wacom_features_0xD0 =
         { "Wacom Bamboo 2FG",     WACOM_PKGLEN_BBFUN,     14720,  9200, 1023,
           31, BAMBOO_PT, WACOM_INTUOS_RES, WACOM_INTUOS_RES };
@@ -1766,6 +1791,7 @@ const struct usb_device_id wacom_ids[] = {
         { USB_DEVICE_DETAILED(0xCE, USB_CLASS_HID,
                               USB_INTERFACE_SUBCLASS_BOOT,
                               USB_INTERFACE_PROTOCOL_MOUSE) },
+        { USB_DEVICE_WACOM(0x84) },
         { USB_DEVICE_WACOM(0xD0) },
         { USB_DEVICE_WACOM(0xD1) },
         { USB_DEVICE_WACOM(0xD2) },