hid: Panasonic UB-T780 and UB-T880 driver

Panasonic Elite Panaboard UB-T* hid driver.
Removed all unnesessary comments and debug stuff. Multitouch now uses Protocol B. Still parsing by hands because of incompatible report descriptor in UB-T780.
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drivers/hid/Kconfig +0 -0

index 2560f01..5c96c63 100644

drivers/hid/Makefile +5 -0

+#include <linux/device.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/usb.h>
+#include <linux/fs.h>

drivers/hid/Makefile +35 -0

+static int ubt880_switch_mode(struct hid_device *hid, unsigned char mode)
+{
+	struct hid_report *report = NULL;
+	struct hid_report *report_cur = NULL;
+	__s32 *val = NULL;
+	list_for_each_entry(report, &hid->report_enum[HID_FEATURE_REPORT].report_list, list)
+	{
+		if (hid->report_enum[HID_FEATURE_REPORT].numbered)
+			report_cur = report;
+	}
+	if (report_cur == NULL)
+		return -EIO;
+
+	val = report_cur->field[0]->value;
+	val[0] = mode;
+	usbhid_submit_report(hid, report_cur, USB_DIR_OUT);
+	return 0;
+}
+
+static int ubt780_switch_mode(struct hid_device *hid, unsigned char mode)
+{
+	struct hid_report *report = NULL;
+	struct hid_report *report_cur = NULL;
+	__s32 *val = NULL;
+	list_for_each_entry(report, &hid->report_enum[HID_OUTPUT_REPORT].report_list, list)
+	{
+		if (hid->report_enum[HID_OUTPUT_REPORT].numbered)
+			report_cur = report;
+	}
+
+	if (report_cur == NULL)
+		return -EIO;
+
+	val = report_cur->field[0]->value;
+	val[0] = 0x7e;

drivers/hid/Makefile +37 -0

+
+	left2  = (*pLeft) * (*pLeft);
+	right2 = (*pRight) * (*pRight);
+
+	if (left2 == 0 && right2 == 0) {
+		*pLeft = drvdata->xold;
+		*pRight = drvdata->yold;
+	    return true;
+	}
+
+	n = (right2 - left2) / (2 * w);
+	w_n = w-n;
+
+	sqr = (2 * left2 - (w_n * w_n));
+
+	if (sqr < 0)
+		return false;
+
+	xx = (w_n + int_sqrt(sqr)) / 2;
+	yy = xx + n;
+
+	if (xx < 0 || yy < 0)
+		return false;
+
+	*pLeft = xx;
+	*pRight = yy;
+	drvdata->xold = xx;
+	drvdata->yold = yy;
+
+	return true;
+}
+
+static void ubt880_set_input(struct input_dev *input)
+{
+	/* Basics */
+	/*We have a key*/
+	__set_bit(EV_KEY, input->evbit);

drivers/hid/Makefile +5 -0

+}
 
+static void ubt880_report_contact(struct input_dev *input, struct ubt_mt_contact *contact)
+{
+	/* Contact id's are allways 1..3 so we can determine slot
+	 * without keeping contact data in device data.

drivers/hid/Makefile +49 -0

+static int ubt880_raw_event(struct hid_device *hdev, struct hid_report *report, u8 *data, int size)
+{
+	struct ubt_data *driver_data = hid_get_drvdata(hdev);
+
+	struct input_dev *input = ubt880_get_input(hdev);
+	if (!input)
+		return -1;
+
+	if (!driver_data)
+		return -1;
+	/*Save the packet for userspace processing*/
+	/*Mouse mode packet*/
+	switch (data[0]) {
+	case 0x01: {
+		int leftbtn, rightbtn;
+		struct ubt880_dgtzr *pack = (struct ubt880_dgtzr *)data;
+		if (driver_data->current_mode == MODE_UKN)
+			driver_data->current_mode = MODE_MOUSE;
+		leftbtn = pack->command & 0x01;
+		rightbtn = (pack->command & 0x02) >> 1;
+		ubt_report_input(input, pack->data[0], pack->data[1], leftbtn, rightbtn);
+		if (driver_data->current_mode != MODE_MOUSE)
+			ubt880_switch_mode(hdev, MODE_MOUSE);
+		break;
+	}
+	case 0x02: {
+		struct ubt780_dgtzr *pack = (struct ubt780_dgtzr *)data;
+		if (driver_data->current_mode == MODE_UKN)
+			driver_data->current_mode = MODE_DGTZR;
+
+		if (driver_data->current_mode == MODE_MOUSE) {
+			driver_data->switch_mode(hdev, MODE_MOUSE);
+		} else if (driver_data->current_mode == MODE_DGTZR) {
+			unsigned short *pCoord = (unsigned short *)(&pack->data[3]);
+			int X = (int) pCoord[0];
+			int Y = (int) pCoord[1];
+			int leftBtn = pack->data[2] >> 5 & 0x01;
+			int rightBtn = pack->data[2] >> 4 & 0x01;
+			if (ubt_pen_to_int(&X, &Y, driver_data))
+				ubt_report_input(input, X, Y, leftBtn, rightBtn);
+		}
+		break;
+	}
+	case 0x03: {
+		struct ubt_mt_packet *packet = (struct ubt_mt_packet *)data;
+		if (driver_data->current_mode == MODE_UKN)
+			driver_data->current_mode = MODE_MULTITOUCH;
+
+		if (driver_data->current_mode == MODE_MOUSE) {