+int wacom_tpc_irq(struct wacom_wac *wacom, void *wcombo)
+{
+ char *data = wacom->data;
+ int prox = 0, pressure;
+ static int stylusInProx, touchInProx = 1, touchOut;
+ struct urb *urb = ((struct wacom_combo *)wcombo)->urb;
+
+ dbg("wacom_tpc_irq: received report #%d", data[0]);
+
+ if (urb->actual_length == 5 || data[0] == 6) { /* Touch data */
+ if (urb->actual_length == 5) { /* with touch */
+ prox = data[0] & 0x03;
+ } else { /* with capacity */
+ prox = data[1] & 0x03;
+ }
+
+ if (!stylusInProx) { /* stylus not in prox */
+ if (prox) {
+ if (touchInProx) {
+ wacom->tool[1] = BTN_TOOL_DOUBLETAP;
+ wacom->id[0] = TOUCH_DEVICE_ID;
+ if (urb->actual_length != 5) {
+ wacom_report_abs(wcombo, ABS_X, wacom_le16_to_cpu(&data[2]));
+ wacom_report_abs(wcombo, ABS_Y, wacom_le16_to_cpu(&data[4]));
+ wacom_report_abs(wcombo, ABS_PRESSURE, wacom_le16_to_cpu(&data[6]));
+ wacom_report_key(wcombo, BTN_TOUCH, wacom_le16_to_cpu(&data[6]));
+ } else {
+ wacom_report_abs(wcombo, ABS_X, wacom_le16_to_cpu(&data[1]));
+ wacom_report_abs(wcombo, ABS_Y, wacom_le16_to_cpu(&data[3]));
+ wacom_report_key(wcombo, BTN_TOUCH, 1);
+ }
+ wacom_report_abs(wcombo, ABS_MISC, wacom->id[0]);
+ wacom_report_key(wcombo, wacom->tool[1], prox & 0x01);
+ touchOut = 1;
+ return 1;
+ }
+ } else {
+ wacom_report_abs(wcombo, ABS_MISC, wacom->id[0]);
+ wacom_report_key(wcombo, wacom->tool[1], prox & 0x01);
+ wacom_report_key(wcombo, BTN_TOUCH, 0);
+ touchOut = 0;
+ touchInProx = 1;
+ return 1;
+ }
+ } else if (touchOut || !prox) { /* force touch out-prox */
+ wacom_report_abs(wcombo, ABS_MISC, TOUCH_DEVICE_ID);
+ wacom_report_key(wcombo, BTN_TOUCH, 0);
+ touchOut = 0;
+ touchInProx = 1;
+ return 1;
+ }
+ } else if (data[0] == 2) { /* Penabled */
+ prox = data[1] & 0x20;
+
+ touchInProx = 0;
+
+ wacom->id[0] = ERASER_DEVICE_ID;
+
+ /*
+ * if going from out of proximity into proximity select between the eraser
+ * and the pen based on the state of the stylus2 button, choose eraser if
+ * pressed else choose pen. if not a proximity change from out to in, send
+ * an out of proximity for previous tool then a in for new tool.
+ */
+ if (prox) { /* in prox */
+ if (!wacom->tool[0]) {
+ /* Going into proximity select tool */
+ wacom->tool[1] = (data[1] & 0x08) ? BTN_TOOL_RUBBER : BTN_TOOL_PEN;
+ if (wacom->tool[1] == BTN_TOOL_PEN)
+ wacom->id[0] = STYLUS_DEVICE_ID;
+ } else if (wacom->tool[1] == BTN_TOOL_RUBBER && !(data[1] & 0x08)) {
+ /*
+ * was entered with stylus2 pressed
+ * report out proximity for previous tool
+ */
+ wacom_report_abs(wcombo, ABS_MISC, wacom->id[0]);
+ wacom_report_key(wcombo, wacom->tool[1], 0);
+ wacom_input_sync(wcombo);
+
+ /* set new tool */
+ wacom->tool[1] = BTN_TOOL_PEN;
+ wacom->id[0] = STYLUS_DEVICE_ID;
+ return 0;
+ }
+ if (wacom->tool[1] != BTN_TOOL_RUBBER) {
+ /* Unknown tool selected default to pen tool */
+ wacom->tool[1] = BTN_TOOL_PEN;
+ wacom->id[0] = STYLUS_DEVICE_ID;
+ }
+ wacom_report_key(wcombo, BTN_STYLUS, data[1] & 0x02);
+ wacom_report_key(wcombo, BTN_STYLUS2, data[1] & 0x10);
+ wacom_report_abs(wcombo, ABS_X, wacom_le16_to_cpu(&data[2]));
+ wacom_report_abs(wcombo, ABS_Y, wacom_le16_to_cpu(&data[4]));
+ pressure = ((data[7] & 0x01) << 8) | data[6];
+ if (pressure < 0)
+ pressure = wacom->features->pressure_max + pressure + 1;
+ wacom_report_abs(wcombo, ABS_PRESSURE, pressure);
+ wacom_report_key(wcombo, BTN_TOUCH, pressure);
+ } else {
+ wacom_report_abs(wcombo, ABS_PRESSURE, 0);
+ wacom_report_key(wcombo, BTN_STYLUS, 0);
+ wacom_report_key(wcombo, BTN_STYLUS2, 0);
+ wacom_report_key(wcombo, BTN_TOUCH, 0);
+ }
+ wacom_report_key(wcombo, wacom->tool[1], prox);
+ wacom_report_abs(wcombo, ABS_MISC, wacom->id[0]);
+ stylusInProx = prox;
+ wacom->tool[0] = prox;
+ return 1;
+ }
+ return 0;
+}
+