Input: wacom - add support for new USB Tablet PCs

Signed-off-by: Ping Cheng <[e-mail]>
Signed-off-by: Dmitry Torokhov <[e-mail]>

drivers/input/tablet/wacom.h

···
  *		   - Support Intuos3 4x6
  *      v1.47 (pc) - Added support for Bamboo
  *      v1.48 (pc) - Added support for Bamboo1, BambooFun, and Cintiq 12WX
+ *      v1.49 (pc) - Added support for USB Tablet PC (0x90, 0x93, and 0x9A)
  */
 
 /*
···
 /*
  * Version Information
  */
-#define DRIVER_VERSION "v1.48"
+#define DRIVER_VERSION "v1.49"
 #define DRIVER_AUTHOR "Vojtech Pavlik <[e-mail]>"
 #define DRIVER_DESC "USB Wacom Graphire and Wacom Intuos tablet driver"
 #define DRIVER_LICENSE "GPL"
···
 	struct usb_device *usbdev;
 	struct usb_interface *intf;
 	struct urb *irq;
-	struct wacom_wac * wacom_wac;
+	struct wacom_wac *wacom_wac;
 	struct mutex lock;
 	unsigned int open:1;
 	char phys[32];
 };
 
 struct wacom_combo {
-	struct wacom * wacom;
-	struct urb * urb;
+	struct wacom *wacom;
+	struct urb *urb;
 };
 
 extern int wacom_wac_irq(struct wacom_wac * wacom_wac, void * wcombo);
···
 extern void input_dev_bee(struct input_dev *input_dev, struct wacom_wac *wacom_wac);
 extern __u16 wacom_le16_to_cpu(unsigned char *data);
 extern __u16 wacom_be16_to_cpu(unsigned char *data);
-extern struct wacom_features * get_wacom_feature(const struct usb_device_id *id);
-extern const struct usb_device_id * get_device_table(void);
+extern struct wacom_features *get_wacom_feature(const struct usb_device_id *id);
+extern const struct usb_device_id *get_device_table(void);
 
 #endif

drivers/input/tablet/wacom_sys.c

···
 #include "wacom.h"
 #include "wacom_wac.h"
 
+/* defines to get HID report descriptor */
+#define HID_DEVICET_HID		(USB_TYPE_CLASS | 0x01)
+#define HID_DEVICET_REPORT	(USB_TYPE_CLASS | 0x02)
+#define HID_USAGE_UNDEFINED		0x00
+#define HID_USAGE_PAGE			0x05
+#define HID_USAGE_PAGE_DIGITIZER	0x0d
+#define HID_USAGE_PAGE_DESKTOP		0x01
+#define HID_USAGE			0x09
+#define HID_USAGE_X			0x30
+#define HID_USAGE_Y			0x31
+#define HID_USAGE_X_TILT		0x3d
+#define HID_USAGE_Y_TILT		0x3e
+#define HID_USAGE_FINGER		0x22
+#define HID_USAGE_STYLUS		0x20
+#define HID_COLLECTION			0xc0
+
+enum {
+	WCM_UNDEFINED = 0,
+	WCM_DESKTOP,
+	WCM_DIGITIZER,
+};
+
+struct hid_descriptor {
+	struct usb_descriptor_header header;
+	__le16   bcdHID;
+	u8       bCountryCode;
+	u8       bNumDescriptors;
+	u8       bDescriptorType;
+	__le16   wDescriptorLength;
+} __attribute__ ((packed));
+
+/* defines to get/set USB message */
 #define USB_REQ_GET_REPORT	0x01
 #define USB_REQ_SET_REPORT	0x09
+#define WAC_HID_FEATURE_REPORT	0x03
 
 static int usb_get_report(struct usb_interface *intf, unsigned char type,
 				unsigned char id, void *buf, int size)
···
 void wacom_report_key(void *wcombo, unsigned int key_type, int key_data)
 {
 	input_report_key(get_input_dev((struct wacom_combo *)wcombo), key_type, key_data);
-	return;
 }
 
 void wacom_report_abs(void *wcombo, unsigned int abs_type, int abs_data)
 {
 	input_report_abs(get_input_dev((struct wacom_combo *)wcombo), abs_type, abs_data);
-	return;
 }
 
 void wacom_report_rel(void *wcombo, unsigned int rel_type, int rel_data)
 {
 	input_report_rel(get_input_dev((struct wacom_combo *)wcombo), rel_type, rel_data);
-	return;
 }
 
 void wacom_input_event(void *wcombo, unsigned int type, unsigned int code, int value)
 {
 	input_event(get_input_dev((struct wacom_combo *)wcombo), type, code, value);
-	return;
 }
 
 __u16 wacom_be16_to_cpu(unsigned char *data)
···
 void wacom_input_sync(void *wcombo)
 {
 	input_sync(get_input_dev((struct wacom_combo *)wcombo));
-	return;
 }
 
 static int wacom_open(struct input_dev *dev)
···
 
 void input_dev_mo(struct input_dev *input_dev, struct wacom_wac *wacom_wac)
 {
-	input_dev->keybit[BIT_WORD(BTN_LEFT)] |= BIT_MASK(BTN_1) |
+	input_dev->keybit[BIT_WORD(BTN_MISC)] |= BIT_MASK(BTN_1) |
 		BIT_MASK(BTN_5);
 	input_set_abs_params(input_dev, ABS_WHEEL, 0, 71, 0, 0);
 }
···
 	input_dev->evbit[0] |= BIT_MASK(EV_MSC);
 	input_dev->mscbit[0] |= BIT_MASK(MSC_SERIAL);
 	input_dev->keybit[BIT_WORD(BTN_DIGI)] |= BIT_MASK(BTN_TOOL_FINGER);
-	input_dev->keybit[BIT_WORD(BTN_LEFT)] |= BIT_MASK(BTN_0) |
+	input_dev->keybit[BIT_WORD(BTN_MISC)] |= BIT_MASK(BTN_0) |
 		BIT_MASK(BTN_4);
 }
 
···
 {
 	input_dev->evbit[0] |= BIT_MASK(EV_REL);
 	input_dev->relbit[0] |= BIT_MASK(REL_WHEEL);
-	input_dev->keybit[BIT_WORD(BTN_LEFT)] |= BIT_MASK(BTN_LEFT) |
+	input_dev->keybit[BIT_WORD(BTN_MOUSE)] |= BIT_MASK(BTN_LEFT) |
 		BIT_MASK(BTN_RIGHT) | BIT_MASK(BTN_MIDDLE);
 	input_dev->keybit[BIT_WORD(BTN_DIGI)] |= BIT_MASK(BTN_TOOL_RUBBER) |
 		BIT_MASK(BTN_TOOL_MOUSE) | BIT_MASK(BTN_STYLUS2);
···
 void input_dev_i3s(struct input_dev *input_dev, struct wacom_wac *wacom_wac)
 {
 	input_dev->keybit[BIT_WORD(BTN_DIGI)] |= BIT_MASK(BTN_TOOL_FINGER);
-	input_dev->keybit[BIT_WORD(BTN_LEFT)] |= BIT_MASK(BTN_0) |
+	input_dev->keybit[BIT_WORD(BTN_MISC)] |= BIT_MASK(BTN_0) |
 		BIT_MASK(BTN_1) | BIT_MASK(BTN_2) | BIT_MASK(BTN_3);
 	input_set_abs_params(input_dev, ABS_RX, 0, 4096, 0, 0);
 	input_set_abs_params(input_dev, ABS_Z, -900, 899, 0, 0);
···
 
 void input_dev_i3(struct input_dev *input_dev, struct wacom_wac *wacom_wac)
 {
-	input_dev->keybit[BIT_WORD(BTN_LEFT)] |= BIT_MASK(BTN_4) |
+	input_dev->keybit[BIT_WORD(BTN_MISC)] |= BIT_MASK(BTN_4) |
 		BIT_MASK(BTN_5) | BIT_MASK(BTN_6) | BIT_MASK(BTN_7);
 	input_set_abs_params(input_dev, ABS_RY, 0, 4096, 0, 0);
 }
 
 void input_dev_bee(struct input_dev *input_dev, struct wacom_wac *wacom_wac)
 {
-	input_dev->keybit[BIT_WORD(BTN_LEFT)] |= BIT_MASK(BTN_8) | BIT_MASK(BTN_9);
+	input_dev->keybit[BIT_WORD(BTN_MISC)] |= BIT_MASK(BTN_8) | BIT_MASK(BTN_9);
 }
 
 void input_dev_i(struct input_dev *input_dev, struct wacom_wac *wacom_wac)
···
 	input_dev->evbit[0] |= BIT_MASK(EV_MSC) | BIT_MASK(EV_REL);
 	input_dev->mscbit[0] |= BIT_MASK(MSC_SERIAL);
 	input_dev->relbit[0] |= BIT_MASK(REL_WHEEL);
-	input_dev->keybit[BIT_WORD(BTN_LEFT)] |= BIT_MASK(BTN_LEFT) |
+	input_dev->keybit[BIT_WORD(BTN_MOUSE)] |= BIT_MASK(BTN_LEFT) |
 		BIT_MASK(BTN_RIGHT) | BIT_MASK(BTN_MIDDLE) |
 		BIT_MASK(BTN_SIDE) | BIT_MASK(BTN_EXTRA);
 	input_dev->keybit[BIT_WORD(BTN_DIGI)] |= BIT_MASK(BTN_TOOL_RUBBER) |
···
 
 void input_dev_pl(struct input_dev *input_dev, struct wacom_wac *wacom_wac)
 {
-	input_dev->keybit[BIT_WORD(BTN_DIGI)] |= BIT_MASK(BTN_STYLUS2) |
-		BIT_MASK(BTN_TOOL_RUBBER);
+	input_dev->keybit[BIT_WORD(BTN_DIGI)] |= BIT_MASK(BTN_STYLUS2);
 }
 
 void input_dev_pt(struct input_dev *input_dev, struct wacom_wac *wacom_wac)
···
 	input_dev->keybit[BIT_WORD(BTN_DIGI)] |= BIT_MASK(BTN_TOOL_RUBBER);
 }
 
+static int wacom_parse_hid(struct usb_interface *intf, struct hid_descriptor *hid_desc,
+			   struct wacom_wac *wacom_wac)
+{
+	struct usb_device *dev = interface_to_usbdev(intf);
+	struct wacom_features *features = wacom_wac->features;
+	char limit = 0, result = 0;
+	int i = 0, usage = WCM_UNDEFINED, finger = 0, pen = 0;
+	unsigned char *report;
+
+	report = kzalloc(hid_desc->wDescriptorLength, GFP_KERNEL);
+	if (!report)
+		return -ENOMEM;
+
+	/* retrive report descriptors */
+	do {
+		result = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
+			USB_REQ_GET_DESCRIPTOR,
+			USB_RECIP_INTERFACE | USB_DIR_IN,
+			HID_DEVICET_REPORT << 8,
+			intf->altsetting[0].desc.bInterfaceNumber, /* interface */
+			report,
+			hid_desc->wDescriptorLength,
+			5000); /* 5 secs */
+	} while (result < 0 && limit++ < 5);
+
+	if (result < 0)
+		goto out;
+
+	for (i = 0; i < hid_desc->wDescriptorLength; i++) {
+
+		switch (report[i]) {
+		case HID_USAGE_PAGE:
+			switch (report[i + 1]) {
+			case HID_USAGE_PAGE_DIGITIZER:
+				usage = WCM_DIGITIZER;
+				i++;
+				break;
+
+			case HID_USAGE_PAGE_DESKTOP:
+				usage = WCM_DESKTOP;
+				i++;
+				break;
+			}
+			break;
+
+		case HID_USAGE:
+			switch (report[i + 1]) {
+			case HID_USAGE_X:
+				if (usage == WCM_DESKTOP) {
+					if (finger) {
+						features->touch_x_max =
+							features->touch_y_max =
+							wacom_le16_to_cpu(&report[i + 3]);
+						features->x_max =
+							wacom_le16_to_cpu(&report[i + 6]);
+						i += 7;
+					} else if (pen) {
+						features->x_max =
+							wacom_le16_to_cpu(&report[i + 3]);
+						i += 4;
+					}
+				} else if (usage == WCM_DIGITIZER) {
+					/* max pressure isn't reported
+					features->pressure_max = (unsigned short)
+							(report[i+4] << 8  | report[i + 3]);
+					*/
+					features->pressure_max = 255;
+					i += 4;
+				}
+				break;
+
+			case HID_USAGE_Y:
+				if (usage == WCM_DESKTOP)
+					features->y_max =
+						wacom_le16_to_cpu(&report[i + 3]);
+				i += 4;
+				break;
+
+			case HID_USAGE_FINGER:
+				finger = 1;
+				i++;
+				break;
+
+			case HID_USAGE_STYLUS:
+				pen = 1;
+				i++;
+				break;
+
+			case HID_USAGE_UNDEFINED:
+				if (usage == WCM_DESKTOP && finger) /* capacity */
+					features->pressure_max =
+						wacom_le16_to_cpu(&report[i + 3]);
+				i += 4;
+				break;
+			}
+			break;
+
+		case HID_COLLECTION:
+			/* reset UsagePage ans Finger */
+			finger = usage = 0;
+			break;
+		}
+	}
+
+	result = 0;
+
+ out:
+	kfree(report);
+	return result;
+}
+
 static int wacom_probe(struct usb_interface *intf, const struct usb_device_id *id)
 {
 	struct usb_device *dev = interface_to_usbdev(intf);
+	struct usb_host_interface *interface = intf->cur_altsetting;
 	struct usb_endpoint_descriptor *endpoint;
 	struct wacom *wacom;
 	struct wacom_wac *wacom_wac;
+	struct wacom_features *features;
 	struct input_dev *input_dev;
 	int error = -ENOMEM;
 	char rep_data[2], limit = 0;
+	struct hid_descriptor *hid_desc;
 
 	wacom = kzalloc(sizeof(struct wacom), GFP_KERNEL);
 	wacom_wac = kzalloc(sizeof(struct wacom_wac), GFP_KERNEL);
···
 	usb_make_path(dev, wacom->phys, sizeof(wacom->phys));
 	strlcat(wacom->phys, "/input0", sizeof(wacom->phys));
 
-	wacom_wac->features = get_wacom_feature(id);
-	BUG_ON(wacom_wac->features->pktlen > 10);
+	wacom_wac->features = features = get_wacom_feature(id);
+	BUG_ON(features->pktlen > 10);
 
 	input_dev->name = wacom_wac->features->name;
 	wacom->wacom_wac = wacom_wac;
···
 	input_dev->open = wacom_open;
 	input_dev->close = wacom_close;
 
+	endpoint = &intf->cur_altsetting->endpoint[0].desc;
+
+	/* TabletPC need to retrieve the physical and logical maximum from report descriptor */
+	if (wacom_wac->features->type == TABLETPC) {
+		if (usb_get_extra_descriptor(interface, HID_DEVICET_HID, &hid_desc)) {
+			if (usb_get_extra_descriptor(&interface->endpoint[0],
+						     HID_DEVICET_REPORT, &hid_desc)) {
+				printk("wacom: can not retrive extra class descriptor\n");
+				goto fail2;
+			}
+		}
+		error = wacom_parse_hid(intf, hid_desc, wacom_wac);
+		if (error)
+			goto fail2;
+	}
+
 	input_dev->evbit[0] |= BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
 	input_dev->keybit[BIT_WORD(BTN_DIGI)] |= BIT_MASK(BTN_TOOL_PEN) |
 		BIT_MASK(BTN_TOUCH) | BIT_MASK(BTN_STYLUS);
-	input_set_abs_params(input_dev, ABS_X, 0, wacom_wac->features->x_max, 4, 0);
-	input_set_abs_params(input_dev, ABS_Y, 0, wacom_wac->features->y_max, 4, 0);
-	input_set_abs_params(input_dev, ABS_PRESSURE, 0, wacom_wac->features->pressure_max, 0, 0);
+	input_set_abs_params(input_dev, ABS_X, 0, features->x_max, 4, 0);
+	input_set_abs_params(input_dev, ABS_Y, 0, features->y_max, 4, 0);
+	input_set_abs_params(input_dev, ABS_PRESSURE, 0, features->pressure_max, 0, 0);
+	if (features->type == TABLETPC) {
+		input_dev->keybit[BIT_WORD(BTN_DIGI)] |= BIT_MASK(BTN_TOOL_DOUBLETAP);
+		input_set_abs_params(input_dev, ABS_RX, 0, features->touch_x_max, 4, 0);
+		input_set_abs_params(input_dev, ABS_RY, 0, features->touch_y_max, 4, 0);
+	}
 	input_dev->absbit[BIT_WORD(ABS_MISC)] |= BIT_MASK(ABS_MISC);
 
 	wacom_init_input_dev(input_dev, wacom_wac);
-
-	endpoint = &intf->cur_altsetting->endpoint[0].desc;
 
 	usb_fill_int_urb(wacom->irq, dev,
 			 usb_rcvintpipe(dev, endpoint->bEndpointAddress),
···
 	if (error)
 		goto fail3;
 
-	/* Ask the tablet to report tablet data. Repeat until it succeeds */
-	do {
-		rep_data[0] = 2;
-		rep_data[1] = 2;
-		usb_set_report(intf, 3, 2, rep_data, 2);
-		usb_get_report(intf, 3, 2, rep_data, 2);
-	} while (rep_data[1] != 2 && limit++ < 5);
+	/*
+	 * Ask the tablet to report tablet data if it is not a Tablet PC.
+	 * Repeat until it succeeds
+	 */
+	if (wacom_wac->features->type != TABLETPC) {
+		do {
+			rep_data[0] = 2;
+			rep_data[1] = 2;
+			error = usb_set_report(intf, WAC_HID_FEATURE_REPORT,
+						2, rep_data, 2);
+			if (error >= 0)
+				error = usb_get_report(intf,
+						WAC_HID_FEATURE_REPORT, 2,
+						rep_data, 2);
+		} while ((error < 0 || rep_data[1] != 2) && limit++ < 5);
+	}
 
 	usb_set_intfdata(intf, wacom);
 	return 0;
···
 	usb_kill_urb(wacom->irq);
 	input_unregister_device(wacom->dev);
 	usb_free_urb(wacom->irq);
-	usb_buffer_free(interface_to_usbdev(intf), 10, wacom->wacom_wac->data, wacom->data_dma);
+	usb_buffer_free(interface_to_usbdev(intf), 10,
+			wacom->wacom_wac->data, wacom->data_dma);
 	kfree(wacom->wacom_wac);
 	kfree(wacom);
 }

drivers/input/tablet/wacom_wac.c

···
 	return 1;
 }
 
+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;
+}
+
 int wacom_wac_irq(struct wacom_wac *wacom_wac, void *wcombo)
 {
 	switch (wacom_wac->features->type) {
 		case PENPARTNER:
-			return (wacom_penpartner_irq(wacom_wac, wcombo));
-			break;
+			return wacom_penpartner_irq(wacom_wac, wcombo);
+
 		case PL:
-			return (wacom_pl_irq(wacom_wac, wcombo));
-			break;
+			return wacom_pl_irq(wacom_wac, wcombo);
+
 		case WACOM_G4:
 		case GRAPHIRE:
 		case WACOM_MO:
-			return (wacom_graphire_irq(wacom_wac, wcombo));
-			break;
+			return wacom_graphire_irq(wacom_wac, wcombo);
+
 		case PTU:
-			return (wacom_ptu_irq(wacom_wac, wcombo));
-			break;
+			return wacom_ptu_irq(wacom_wac, wcombo);
+
 		case INTUOS:
 		case INTUOS3S:
 		case INTUOS3:
 		case INTUOS3L:
 		case CINTIQ:
 		case WACOM_BEE:
-			return (wacom_intuos_irq(wacom_wac, wcombo));
-			break;
+			return wacom_intuos_irq(wacom_wac, wcombo);
+
+		case TABLETPC:
+			return wacom_tpc_irq(wacom_wac, wcombo);
+
 		default:
 			return 0;
 	}
···
 			/* fall through */
 		case INTUOS3S:
 			input_dev_i3s(input_dev, wacom_wac);
+			/* fall through */
 		case INTUOS:
 			input_dev_i(input_dev, wacom_wac);
 			break;
 		case PL:
 		case PTU:
+		case TABLETPC:
 			input_dev_pl(input_dev, wacom_wac);
-			break;
+			/* fall through */
 		case PENPARTNER:
 			input_dev_pt(input_dev, wacom_wac);
 			break;
···
 	{ "Wacom Graphire4 6x8", 8,  16704, 12064,  511, 63, WACOM_G4 },
 	{ "Wacom BambooFun 4x5", 9,  14760,  9225,  511, 63, WACOM_MO },
 	{ "Wacom BambooFun 6x8", 9,  21648, 13530,  511, 63, WACOM_MO },
+	{ "Wacom Bamboo1 Medium",8,  16704, 12064,  511, 63, GRAPHIRE },
 	{ "Wacom Volito",        8,   5104,  3712,  511, 63, GRAPHIRE },
 	{ "Wacom PenStation2",   8,   3250,  2320,  255, 63, GRAPHIRE },
 	{ "Wacom Volito2 4x5",   8,   5104,  3712,  511, 63, GRAPHIRE },
···
 	{ "Wacom Cintiq 21UX",   10, 87200, 65600, 1023, 63, CINTIQ },
 	{ "Wacom Cintiq 20WSX",  10, 86680, 54180, 1023, 63, WACOM_BEE },
 	{ "Wacom Cintiq 12WX",   10, 53020, 33440, 1023, 63, WACOM_BEE },
+	{ "Wacom DTU1931",        8, 37832, 30305,  511,  0, PL },
+	{ "Wacom ISDv4 90",       8, 26202, 16325,  255,  0, TABLETPC },
+	{ "Wacom ISDv4 93",       8, 26202, 16325,  255,  0, TABLETPC },
+	{ "Wacom ISDv4 9A",       8, 26202, 16325,  255,  0, TABLETPC },
 	{ "Wacom Intuos2 6x8",   10, 20320, 16240, 1023, 31, INTUOS },
 	{ }
 };
···
 	{ USB_DEVICE(USB_VENDOR_ID_WACOM, 0x16) },
 	{ USB_DEVICE(USB_VENDOR_ID_WACOM, 0x17) },
 	{ USB_DEVICE(USB_VENDOR_ID_WACOM, 0x18) },
+	{ USB_DEVICE(USB_VENDOR_ID_WACOM, 0x19) },
 	{ USB_DEVICE(USB_VENDOR_ID_WACOM, 0x60) },
 	{ USB_DEVICE(USB_VENDOR_ID_WACOM, 0x61) },
 	{ USB_DEVICE(USB_VENDOR_ID_WACOM, 0x62) },
···
 	{ USB_DEVICE(USB_VENDOR_ID_WACOM, 0x3F) },
 	{ USB_DEVICE(USB_VENDOR_ID_WACOM, 0xC5) },
 	{ USB_DEVICE(USB_VENDOR_ID_WACOM, 0xC6) },
+	{ USB_DEVICE(USB_VENDOR_ID_WACOM, 0xC7) },
+	{ USB_DEVICE(USB_VENDOR_ID_WACOM, 0x90) },
+	{ USB_DEVICE(USB_VENDOR_ID_WACOM, 0x93) },
+	{ USB_DEVICE(USB_VENDOR_ID_WACOM, 0x9A) },
 	{ USB_DEVICE(USB_VENDOR_ID_WACOM, 0x47) },
 	{ }
 };
 
-const struct usb_device_id * get_device_table(void) {
-        const struct usb_device_id * id_table = wacom_ids;
+const struct usb_device_id *get_device_table(void)
+{
+        const struct usb_device_id *id_table = wacom_ids;
+
         return id_table;
 }
 
-struct wacom_features * get_wacom_feature(const struct usb_device_id * id) {
+struct wacom_features * get_wacom_feature(const struct usb_device_id *id)
+{
         int index = id - wacom_ids;
         struct wacom_features *wf = &wacom_features[index];
+
         return wf;
 }
 

drivers/input/tablet/wacom_wac.h

···
 #define WACOM_WAC_H
 
 #define STYLUS_DEVICE_ID	0x02
+#define TOUCH_DEVICE_ID		0x03
 #define CURSOR_DEVICE_ID	0x06
 #define ERASER_DEVICE_ID	0x0A
 #define PAD_DEVICE_ID		0x0F
···
 	CINTIQ,
 	WACOM_BEE,
 	WACOM_MO,
+	TABLETPC,
 	MAX_TYPE
 };
 
···
 	int pressure_max;
 	int distance_max;
 	int type;
+	int touch_x_max;
+	int touch_y_max;
 };
 
 struct wacom_wac {