Input: wacom - add support for the DTI-520 graphics tablet

Add support for the two interfaces provided by the Wacom DTI-520 tablet.  This allows both the tablet itself as well as the hardware buttons to be seen by the kernel.

Signed-off-by Adam Nielsen <[email protected]>

---
Hi all,

I'm resending this and CC'ing the linuxwacom-devel list as suggested.  There are no changes since the previous post.  This is the kernel code that makes the tablet appear as an input device.

Cheers,
Adam.

 drivers/input/tablet/wacom_sys.c |   13 +++++
 drivers/input/tablet/wacom_wac.c |  113 +++++++++++++++++++++++++++++++++++++-
 drivers/input/tablet/wacom_wac.h |    3 +
 3 files changed, 128 insertions(+), 1 deletion(-)

drivers/input/tablet/wacom_sys.c +13 -0

index 0d26921..5d1e35d 100644
@@ -459,6 +459,19 @@ static int wacom_retrieve_hid_descriptor(struct usb_interface *intf,
        features->y_fuzz = 4;
        features->pressure_fuzz = 0;
        features->distance_fuzz = 0;
+       features->x_phy = 0;
+       features->y_phy = 0;
+
+       /* DTI devices have two interfaces */
+       if (features->type == WACOM_DTI) {
+               if (interface->desc.bInterfaceNumber == 0) {
+                       /* digitizer */
+               } else {
+                       /* buttons */
+                       features->device_type = 0;
+                       features->pktlen = WACOM_PKGLEN_DTIBTN;
+               }
+       }
 
        /*
         * The wireless device HID is basic and layout conflicts with

drivers/input/tablet/wacom_wac.c +4 -0

index cecd35c..f0ada18 100644
@@ -1073,6 +1073,80 @@ static int wacom_wireless_irq(struct wacom_wac *wacom, size_t len)
        return 0;
  }
 
+static int wacom_dti_pen(struct wacom_wac *wacom)
+{
+       struct wacom_features *features = &wacom->features;
+       char *data = wacom->data;

drivers/input/tablet/wacom_wac.c +4 -0

+
+       if (prox) {
+               wacom->tool[0] = BTN_TOOL_PEN;
+               wacom->id[0] = STYLUS_DEVICE_ID;

drivers/input/tablet/wacom_wac.c +5 -0

+
+       return 0;
+}
+
+static int wacom_dti_pad(struct wacom_wac *wacom)

drivers/input/tablet/wacom_wac.c +29 -0

+
+               /* Buttons along the top of the display */
+               input_report_key(input, BTN_7, data[2] & 0x01);
+               input_report_key(input, BTN_5, data[2] & 0x02);
+               input_report_key(input, BTN_6, data[2] & 0x04);
+               input_report_key(input, BTN_8, data[2] & 0x08);
+               input_report_key(input, BTN_9, data[2] & 0x10);
+
+               return 1;
+       }
+
+       dbg("wacom_dti_pad: received unknown report #%d", data[0]);
+       return 0;
+}
+
+static int wacom_dti_irq(struct wacom_wac *wacom, size_t len)
+{
+       if (len == WACOM_PKGLEN_GRAPHIRE)
+               return wacom_dti_pen(wacom);
+       else if (len == WACOM_PKGLEN_DTIBTN)
+               return wacom_dti_pad(wacom);
+
+       return 0;
+}
+
  void wacom_wac_irq(struct wacom_wac *wacom_wac, size_t len)
  {
        bool sync;

@@ -1127,6 +1201,10 @@ void wacom_wac_irq(struct wacom_wac *wacom_wac, size_t len)
                sync = wacom_wireless_irq(wacom_wac, len);
                break;
 
+       case WACOM_DTI:
+               sync = wacom_dti_irq(wacom_wac, len);
+               break;
+

       default:
               sync = false;
               break;

drivers/input/tablet/wacom_wac.c +1 -1

@@ -1241,7 +1319,7 @@ void wacom_setup_input_capabilities(struct input_dev *input_dev,
                /* penabled devices have fixed resolution for each model */
                input_abs_set_res(input_dev, ABS_X, features->x_resolution);
                input_abs_set_res(input_dev, ABS_Y, features->y_resolution);
-       } else {
+       } else if ((features->x_phy > 0) && (features->y_phy > 0)) {
                input_abs_set_res(input_dev, ABS_X,
                        wacom_calculate_touch_res(features->x_max,
                                                features->x_phy));

drivers/input/tablet/wacom_wac.c +13 -0

+               switch (features->device_type) {
+               case BTN_TOOL_PEN:
+                       __set_bit(BTN_TOOL_PEN, input_dev->keybit);
+                       __set_bit(BTN_STYLUS, input_dev->keybit);
+                       __set_bit(BTN_STYLUS2, input_dev->keybit);
+
+                       __set_bit(INPUT_PROP_DIRECT, input_dev->propbit);
+                       break;
+
+               case 0:
+                       __set_bit(BTN_0, input_dev->keybit);
+                       __set_bit(BTN_1, input_dev->keybit);
+                       __set_bit(BTN_2, input_dev->keybit);

drivers/input/tablet/wacom_wac.c +4 -0

+                       break;
+               }
+               break;
+

       case PTU:
               __set_bit(BTN_STYLUS2, input_dev->keybit); /* fall through */

drivers/input/tablet/wacom_wac.c +0 -0

@@ -1566,6 +1673,9 @@ static const struct wacom_features wacom_features_0x38 =

 static const struct wacom_features wacom_features_0x39 =
       { "Wacom DTU710",         WACOM_PKGLEN_GRAPHIRE,  34080, 27660,  511, 0, PL, WACOM_PL_RES, WACOM_PL_RES };
+static const struct wacom_features wacom_features_0x3A =
+       { "Wacom DTI520UB/L",     WACOM_PKGLEN_GRAPHIRE,   6282,  4762,  511,
+         0, WACOM_DTI, WACOM_PL_RES, WACOM_PL_RES };
 static const struct wacom_features wacom_features_0xC4 =
       { "Wacom DTF521",         WACOM_PKGLEN_GRAPHIRE,   6282,  4762,  511, 0, PL, WACOM_PL_RES, WACOM_PL_RES };

drivers/input/tablet/wacom_wac.c +1 -0

@@ -1780,6 +1890,7 @@ const struct usb_device_id wacom_ids[] = {
        { USB_DEVICE_WACOM(0x37) },
        { USB_DEVICE_WACOM(0x38) },
        { USB_DEVICE_WACOM(0x39) },
+       { USB_DEVICE_WACOM(0x3A) },
        { USB_DEVICE_WACOM(0xC4) },
        { USB_DEVICE_WACOM(0xC0) },
        { USB_DEVICE_WACOM(0xC2) },

drivers/input/tablet/wacom_wac.h +3 -0

index ba5a334..008aa12 100644
@@ -15,6 +15,7 @@
  #define WACOM_PKGLEN_MAX       64
 
  /* packet length for individual models */
+#define WACOM_PKGLEN_DTIBTN     3
  #define WACOM_PKGLEN_PENPRTN    7
  #define WACOM_PKGLEN_GRAPHIRE   8
  #define WACOM_PKGLEN_BBFUN      9

@@ -35,6 +36,7 @@
 
  /* wacom data packet report IDs */
  #define WACOM_REPORT_PENABLED          2
+#define WACOM_REPORT_DTIBTN            4
  #define WACOM_REPORT_INTUOSREAD                5
  #define WACOM_REPORT_INTUOSWRITE       6
  #define WACOM_REPORT_INTUOSPAD         12

@@ -72,6 +74,7 @@ enum {
        WACOM_MO,
        TABLETPC,
        TABLETPC2FG,
+       WACOM_DTI,

       MAX_TYPE
 };

-- 1.7.10

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