/*

   * drivers/input/tablet/wacom_sys.c

   *

   *  USB Wacom tablet support - system specific code

   */
  
  /*
   * This program is free software; you can redistribute it and/or modify
   * it under the terms of the GNU General Public License as published by
   * the Free Software Foundation; either version 2 of the License, or
   * (at your option) any later version.
   */

  #include "wacom_wac.h"

  #include "wacom.h"

  #include <linux/input/mt.h>

  #define WAC_MSG_RETRIES		5

  #define WAC_CMD_WL_LED_CONTROL	0x03

  #define WAC_CMD_LED_CONTROL	0x20
  #define WAC_CMD_ICON_START	0x21
  #define WAC_CMD_ICON_XFER	0x23

  #define WAC_CMD_ICON_BT_XFER	0x26

  #define WAC_CMD_RETRIES		10

  #define DEV_ATTR_RW_PERM (S_IRUGO | S_IWUSR | S_IWGRP)
  #define DEV_ATTR_WO_PERM (S_IWUSR | S_IWGRP)

  static int wacom_get_report(struct hid_device *hdev, u8 type, u8 *buf,
  			    size_t size, unsigned int retries)

  {

  	int retval;
  
  	do {

  		retval = hid_hw_raw_request(hdev, buf[0], buf, size, type,

  				HID_REQ_GET_REPORT);

  	} while ((retval == -ETIMEDOUT || retval == -EPIPE) && --retries);
  
  	return retval;

  }

  static int wacom_set_report(struct hid_device *hdev, u8 type, u8 *buf,
  			    size_t size, unsigned int retries)

  {

  	int retval;
  
  	do {

  		retval = hid_hw_raw_request(hdev, buf[0], buf, size, type,

  				HID_REQ_SET_REPORT);

  	} while ((retval == -ETIMEDOUT || retval == -EPIPE) && --retries);
  
  	return retval;

  }

  static int wacom_raw_event(struct hid_device *hdev, struct hid_report *report,
  		u8 *raw_data, int size)

  {

  	struct wacom *wacom = hid_get_drvdata(hdev);

  	if (size > WACOM_PKGLEN_MAX)
  		return 1;

  	memcpy(wacom->wacom_wac.data, raw_data, size);

  	wacom_wac_irq(&wacom->wacom_wac, size);
  
  	return 0;

  }

  static int wacom_open(struct input_dev *dev)
  {

  	struct wacom *wacom = input_get_drvdata(dev);

  	return hid_hw_open(wacom->hdev);

  }
  
  static void wacom_close(struct input_dev *dev)
  {

  	struct wacom *wacom = input_get_drvdata(dev);

  	hid_hw_close(wacom->hdev);

  }

  /*

   * Calculate the resolution of the X or Y axis using hidinput_calc_abs_res.

   */
  static int wacom_calc_hid_res(int logical_extents, int physical_extents,

  			       unsigned unit, int exponent)

  {

  	struct hid_field field = {
  		.logical_maximum = logical_extents,
  		.physical_maximum = physical_extents,
  		.unit = unit,
  		.unit_exponent = exponent,
  	};
  
  	return hidinput_calc_abs_res(&field, ABS_X);

  }

  static void wacom_feature_mapping(struct hid_device *hdev,
  		struct hid_field *field, struct hid_usage *usage)

  {

  	struct wacom *wacom = hid_get_drvdata(hdev);
  	struct wacom_features *features = &wacom->wacom_wac.features;

  	struct hid_data *hid_data = &wacom->wacom_wac.hid_data;

  	u8 *data;
  	int ret;

  	switch (usage->hid) {
  	case HID_DG_CONTACTMAX:
  		/* leave touch_max as is if predefined */

  		if (!features->touch_max) {
  			/* read manually */
  			data = kzalloc(2, GFP_KERNEL);
  			if (!data)
  				break;
  			data[0] = field->report->id;
  			ret = wacom_get_report(hdev, HID_FEATURE_REPORT,
  						data, 2, 0);
  			if (ret == 2)
  				features->touch_max = data[1];
  			kfree(data);
  		}

  		break;

  	case HID_DG_INPUTMODE:
  		/* Ignore if value index is out of bounds. */
  		if (usage->usage_index >= field->report_count) {
  			dev_err(&hdev->dev, "HID_DG_INPUTMODE out of range
  ");
  			break;
  		}
  
  		hid_data->inputmode = field->report->id;
  		hid_data->inputmode_index = usage->usage_index;
  		break;

  	}
  }

  /*
   * Interface Descriptor of wacom devices can be incomplete and
   * inconsistent so wacom_features table is used to store stylus
   * device's packet lengths, various maximum values, and tablet
   * resolution based on product ID's.
   *
   * For devices that contain 2 interfaces, wacom_features table is
   * inaccurate for the touch interface.  Since the Interface Descriptor
   * for touch interfaces has pretty complete data, this function exists
   * to query tablet for this missing information instead of hard coding in
   * an additional table.
   *
   * A typical Interface Descriptor for a stylus will contain a
   * boot mouse application collection that is not of interest and this
   * function will ignore it.
   *
   * It also contains a digitizer application collection that also is not
   * of interest since any information it contains would be duplicate
   * of what is in wacom_features. Usually it defines a report of an array
   * of bytes that could be used as max length of the stylus packet returned.
   * If it happens to define a Digitizer-Stylus Physical Collection then
   * the X and Y logical values contain valid data but it is ignored.
   *
   * A typical Interface Descriptor for a touch interface will contain a
   * Digitizer-Finger Physical Collection which will define both logical
   * X/Y maximum as well as the physical size of tablet. Since touch
   * interfaces haven't supported pressure or distance, this is enough
   * information to override invalid values in the wacom_features table.

   *

   * Intuos5 touch interface and 3rd gen Bamboo Touch do not contain useful
   * data. We deal with them after returning from this function.

   */

  static void wacom_usage_mapping(struct hid_device *hdev,
  		struct hid_field *field, struct hid_usage *usage)

  {

  	struct wacom *wacom = hid_get_drvdata(hdev);
  	struct wacom_features *features = &wacom->wacom_wac.features;
  	bool finger = (field->logical == HID_DG_FINGER) ||
  		      (field->physical == HID_DG_FINGER);
  	bool pen = (field->logical == HID_DG_STYLUS) ||
  		   (field->physical == HID_DG_STYLUS);

  	/*
  	* Requiring Stylus Usage will ignore boot mouse
  	* X/Y values and some cases of invalid Digitizer X/Y
  	* values commonly reported.
  	*/
  	if (!pen && !finger)
  		return;

  	/*
  	 * Bamboo models do not support HID_DG_CONTACTMAX.
  	 * And, Bamboo Pen only descriptor contains touch.
  	 */
  	if (features->type != BAMBOO_PT) {
  		/* ISDv4 touch devices at least supports one touch point */
  		if (finger && !features->touch_max)
  			features->touch_max = 1;
  	}

  
  	switch (usage->hid) {
  	case HID_GD_X:
  		features->x_max = field->logical_maximum;
  		if (finger) {
  			features->device_type = BTN_TOOL_FINGER;
  			features->x_phy = field->physical_maximum;
  			if (features->type != BAMBOO_PT) {
  				features->unit = field->unit;
  				features->unitExpo = field->unit_exponent;

  			}

  		} else {
  			features->device_type = BTN_TOOL_PEN;
  		}
  		break;
  	case HID_GD_Y:
  		features->y_max = field->logical_maximum;
  		if (finger) {
  			features->y_phy = field->physical_maximum;
  			if (features->type != BAMBOO_PT) {
  				features->unit = field->unit;
  				features->unitExpo = field->unit_exponent;
  			}
  		}
  		break;
  	case HID_DG_TIPPRESSURE:
  		if (pen)
  			features->pressure_max = field->logical_maximum;
  		break;
  	}

  
  	if (features->type == HID_GENERIC)
  		wacom_wac_usage_mapping(hdev, field, usage);

  }

  static void wacom_post_parse_hid(struct hid_device *hdev,
  				 struct wacom_features *features)
  {
  	struct wacom *wacom = hid_get_drvdata(hdev);
  	struct wacom_wac *wacom_wac = &wacom->wacom_wac;
  
  	if (features->type == HID_GENERIC) {
  		/* Any last-minute generic device setup */
  		if (features->touch_max > 1) {
  			input_mt_init_slots(wacom_wac->input, wacom_wac->features.touch_max,
  				    INPUT_MT_DIRECT);
  		}
  	}
  }

  static void wacom_parse_hid(struct hid_device *hdev,
  			   struct wacom_features *features)
  {
  	struct hid_report_enum *rep_enum;
  	struct hid_report *hreport;
  	int i, j;
  
  	/* check features first */
  	rep_enum = &hdev->report_enum[HID_FEATURE_REPORT];
  	list_for_each_entry(hreport, &rep_enum->report_list, list) {
  		for (i = 0; i < hreport->maxfield; i++) {
  			/* Ignore if report count is out of bounds. */
  			if (hreport->field[i]->report_count < 1)
  				continue;
  
  			for (j = 0; j < hreport->field[i]->maxusage; j++) {
  				wacom_feature_mapping(hdev, hreport->field[i],
  						hreport->field[i]->usage + j);

  			}

  		}
  	}

  	/* now check the input usages */
  	rep_enum = &hdev->report_enum[HID_INPUT_REPORT];
  	list_for_each_entry(hreport, &rep_enum->report_list, list) {
  
  		if (!hreport->maxfield)
  			continue;
  
  		for (i = 0; i < hreport->maxfield; i++)
  			for (j = 0; j < hreport->field[i]->maxusage; j++)
  				wacom_usage_mapping(hdev, hreport->field[i],
  						hreport->field[i]->usage + j);
  	}

  
  	wacom_post_parse_hid(hdev, features);

  }

  static int wacom_hid_set_device_mode(struct hid_device *hdev)
  {
  	struct wacom *wacom = hid_get_drvdata(hdev);
  	struct hid_data *hid_data = &wacom->wacom_wac.hid_data;
  	struct hid_report *r;
  	struct hid_report_enum *re;
  
  	if (hid_data->inputmode < 0)
  		return 0;
  
  	re = &(hdev->report_enum[HID_FEATURE_REPORT]);
  	r = re->report_id_hash[hid_data->inputmode];
  	if (r) {
  		r->field[0]->value[hid_data->inputmode_index] = 2;
  		hid_hw_request(hdev, r, HID_REQ_SET_REPORT);
  	}
  	return 0;
  }

  static int wacom_set_device_mode(struct hid_device *hdev, int report_id,
  		int length, int mode)

  {
  	unsigned char *rep_data;

  	int error = -ENOMEM, limit = 0;

  	rep_data = kzalloc(length, GFP_KERNEL);

  	if (!rep_data)

  		return error;

  	do {

  		rep_data[0] = report_id;
  		rep_data[1] = mode;

  		error = wacom_set_report(hdev, HID_FEATURE_REPORT, rep_data,
  					 length, 1);

  		if (error >= 0)

  			error = wacom_get_report(hdev, HID_FEATURE_REPORT,

  			                         rep_data, length, 1);

  	} while ((error < 0 || rep_data[1] != mode) && limit++ < WAC_MSG_RETRIES);
  
  	kfree(rep_data);
  
  	return error < 0 ? error : 0;
  }

  static int wacom_bt_query_tablet_data(struct hid_device *hdev, u8 speed,
  		struct wacom_features *features)
  {

  	struct wacom *wacom = hid_get_drvdata(hdev);
  	int ret;
  	u8 rep_data[2];
  
  	switch (features->type) {
  	case GRAPHIRE_BT:
  		rep_data[0] = 0x03;
  		rep_data[1] = 0x00;

  		ret = wacom_set_report(hdev, HID_FEATURE_REPORT, rep_data, 2,
  					3);

  
  		if (ret >= 0) {
  			rep_data[0] = speed == 0 ? 0x05 : 0x06;
  			rep_data[1] = 0x00;
  
  			ret = wacom_set_report(hdev, HID_FEATURE_REPORT,

  						rep_data, 2, 3);

  
  			if (ret >= 0) {
  				wacom->wacom_wac.bt_high_speed = speed;
  				return 0;
  			}
  		}
  
  		/*
  		 * Note that if the raw queries fail, it's not a hard failure
  		 * and it is safe to continue
  		 */
  		hid_warn(hdev, "failed to poke device, command %d, err %d
  ",
  			 rep_data[0], ret);
  		break;

  	case INTUOS4WL:
  		if (speed == 1)
  			wacom->wacom_wac.bt_features &= ~0x20;
  		else
  			wacom->wacom_wac.bt_features |= 0x20;
  
  		rep_data[0] = 0x03;
  		rep_data[1] = wacom->wacom_wac.bt_features;

  		ret = wacom_set_report(hdev, HID_FEATURE_REPORT, rep_data, 2,
  					1);

  		if (ret >= 0)
  			wacom->wacom_wac.bt_high_speed = speed;
  		break;

  	}

  	return 0;
  }

  /*
   * Switch the tablet into its most-capable mode. Wacom tablets are
   * typically configured to power-up in a mode which sends mouse-like
   * reports to the OS. To get absolute position, pressure data, etc.
   * from the tablet, it is necessary to switch the tablet out of this
   * mode and into one which sends the full range of tablet data.
   */

  static int wacom_query_tablet_data(struct hid_device *hdev,
  		struct wacom_features *features)

  {

  	if (hdev->bus == BUS_BLUETOOTH)
  		return wacom_bt_query_tablet_data(hdev, 1, features);

  	if (features->type == HID_GENERIC)
  		return wacom_hid_set_device_mode(hdev);

  	if (features->device_type == BTN_TOOL_FINGER) {

  		if (features->type > TABLETPC) {

  			/* MT Tablet PC touch */

  			return wacom_set_device_mode(hdev, 3, 4, 4);

  		}

  		else if (features->type == WACOM_24HDT || features->type == CINTIQ_HYBRID) {

  			return wacom_set_device_mode(hdev, 18, 3, 2);

  		}

  	} else if (features->device_type == BTN_TOOL_PEN) {
  		if (features->type <= BAMBOO_PT && features->type != WIRELESS) {

  			return wacom_set_device_mode(hdev, 2, 2, 2);

  		}

  	}

  	return 0;

  }

  static void wacom_retrieve_hid_descriptor(struct hid_device *hdev,

  					 struct wacom_features *features)

  {

  	struct wacom *wacom = hid_get_drvdata(hdev);
  	struct usb_interface *intf = wacom->intf;

  	/* default features */

  	features->device_type = BTN_TOOL_PEN;

  	features->x_fuzz = 4;
  	features->y_fuzz = 4;
  	features->pressure_fuzz = 0;
  	features->distance_fuzz = 0;

  	/*
  	 * The wireless device HID is basic and layout conflicts with
  	 * other tablets (monitor and touch interface can look like pen).
  	 * Skip the query for this type and modify defaults based on
  	 * interface number.
  	 */
  	if (features->type == WIRELESS) {
  		if (intf->cur_altsetting->desc.bInterfaceNumber == 0) {
  			features->device_type = 0;
  		} else if (intf->cur_altsetting->desc.bInterfaceNumber == 2) {

  			features->device_type = BTN_TOOL_FINGER;

  			features->pktlen = WACOM_PKGLEN_BBTOUCH3;
  		}
  	}

  	/* only devices that support touch need to retrieve the info */

  	if (features->type < BAMBOO_PT)
  		return;

  	wacom_parse_hid(hdev, features);

  }

  struct wacom_hdev_data {

  	struct list_head list;
  	struct kref kref;

  	struct hid_device *dev;

  	struct wacom_shared shared;
  };
  
  static LIST_HEAD(wacom_udev_list);
  static DEFINE_MUTEX(wacom_udev_list_lock);

  static bool wacom_are_sibling(struct hid_device *hdev,
  		struct hid_device *sibling)

  {

  	struct wacom *wacom = hid_get_drvdata(hdev);
  	struct wacom_features *features = &wacom->wacom_wac.features;
  	int vid = features->oVid;
  	int pid = features->oPid;
  	int n1,n2;
  
  	if (vid == 0 && pid == 0) {
  		vid = hdev->vendor;
  		pid = hdev->product;
  	}

  	if (vid != sibling->vendor || pid != sibling->product)
  		return false;

  	/* Compare the physical path. */
  	n1 = strrchr(hdev->phys, '.') - hdev->phys;
  	n2 = strrchr(sibling->phys, '.') - sibling->phys;
  	if (n1 != n2 || n1 <= 0 || n2 <= 0)
  		return false;

  	return !strncmp(hdev->phys, sibling->phys, n1);

  }

  static struct wacom_hdev_data *wacom_get_hdev_data(struct hid_device *hdev)

  {

  	struct wacom_hdev_data *data;

  
  	list_for_each_entry(data, &wacom_udev_list, list) {

  		if (wacom_are_sibling(hdev, data->dev)) {

  			kref_get(&data->kref);
  			return data;
  		}
  	}
  
  	return NULL;
  }

  static int wacom_add_shared_data(struct hid_device *hdev)

  {

  	struct wacom *wacom = hid_get_drvdata(hdev);
  	struct wacom_wac *wacom_wac = &wacom->wacom_wac;
  	struct wacom_hdev_data *data;

  	int retval = 0;
  
  	mutex_lock(&wacom_udev_list_lock);

  	data = wacom_get_hdev_data(hdev);

  	if (!data) {

  		data = kzalloc(sizeof(struct wacom_hdev_data), GFP_KERNEL);

  		if (!data) {
  			retval = -ENOMEM;
  			goto out;
  		}
  
  		kref_init(&data->kref);

  		data->dev = hdev;

  		list_add_tail(&data->list, &wacom_udev_list);
  	}

  	wacom_wac->shared = &data->shared;

  
  out:
  	mutex_unlock(&wacom_udev_list_lock);
  	return retval;
  }
  
  static void wacom_release_shared_data(struct kref *kref)
  {

  	struct wacom_hdev_data *data =
  		container_of(kref, struct wacom_hdev_data, kref);

  
  	mutex_lock(&wacom_udev_list_lock);
  	list_del(&data->list);
  	mutex_unlock(&wacom_udev_list_lock);
  
  	kfree(data);
  }
  
  static void wacom_remove_shared_data(struct wacom_wac *wacom)
  {

  	struct wacom_hdev_data *data;

  
  	if (wacom->shared) {

  		data = container_of(wacom->shared, struct wacom_hdev_data, shared);

  		kref_put(&data->kref, wacom_release_shared_data);
  		wacom->shared = NULL;
  	}
  }

  static int wacom_led_control(struct wacom *wacom)
  {
  	unsigned char *buf;

  	int retval;

  	unsigned char report_id = WAC_CMD_LED_CONTROL;
  	int buf_size = 9;

  	if (wacom->wacom_wac.pid) { /* wireless connected */
  		report_id = WAC_CMD_WL_LED_CONTROL;
  		buf_size = 13;
  	}
  	buf = kzalloc(buf_size, GFP_KERNEL);

  	if (!buf)
  		return -ENOMEM;

  	if (wacom->wacom_wac.features.type >= INTUOS5S &&

  	    wacom->wacom_wac.features.type <= INTUOSPL) {

  		/*
  		 * Touch Ring and crop mark LED luminance may take on
  		 * one of four values:
  		 *    0 = Low; 1 = Medium; 2 = High; 3 = Off
  		 */
  		int ring_led = wacom->led.select[0] & 0x03;
  		int ring_lum = (((wacom->led.llv & 0x60) >> 5) - 1) & 0x03;
  		int crop_lum = 0;

  		unsigned char led_bits = (crop_lum << 4) | (ring_lum << 2) | (ring_led);
  
  		buf[0] = report_id;
  		if (wacom->wacom_wac.pid) {
  			wacom_get_report(wacom->hdev, HID_FEATURE_REPORT,
  					 buf, buf_size, WAC_CMD_RETRIES);
  			buf[0] = report_id;
  			buf[4] = led_bits;
  		} else
  			buf[1] = led_bits;

  	}
  	else {
  		int led = wacom->led.select[0] | 0x4;
  
  		if (wacom->wacom_wac.features.type == WACOM_21UX2 ||
  		    wacom->wacom_wac.features.type == WACOM_24HD)
  			led |= (wacom->led.select[1] << 4) | 0x40;

  		buf[0] = report_id;

  		buf[1] = led;
  		buf[2] = wacom->led.llv;
  		buf[3] = wacom->led.hlv;
  		buf[4] = wacom->led.img_lum;
  	}

  	retval = wacom_set_report(wacom->hdev, HID_FEATURE_REPORT, buf, buf_size,

  				  WAC_CMD_RETRIES);

  	kfree(buf);
  
  	return retval;
  }

  static int wacom_led_putimage(struct wacom *wacom, int button_id, u8 xfer_id,
  		const unsigned len, const void *img)

  {
  	unsigned char *buf;
  	int i, retval;

  	const unsigned chunk_len = len / 4; /* 4 chunks are needed to be sent */

  	buf = kzalloc(chunk_len + 3 , GFP_KERNEL);

  	if (!buf)
  		return -ENOMEM;
  
  	/* Send 'start' command */
  	buf[0] = WAC_CMD_ICON_START;
  	buf[1] = 1;

  	retval = wacom_set_report(wacom->hdev, HID_FEATURE_REPORT, buf, 2,
  				  WAC_CMD_RETRIES);

  	if (retval < 0)
  		goto out;

  	buf[0] = xfer_id;

  	buf[1] = button_id & 0x07;
  	for (i = 0; i < 4; i++) {
  		buf[2] = i;

  		memcpy(buf + 3, img + i * chunk_len, chunk_len);

  		retval = wacom_set_report(wacom->hdev, HID_FEATURE_REPORT,

  					  buf, chunk_len + 3, WAC_CMD_RETRIES);

  		if (retval < 0)
  			break;
  	}
  
  	/* Send 'stop' */
  	buf[0] = WAC_CMD_ICON_START;
  	buf[1] = 0;

  	wacom_set_report(wacom->hdev, HID_FEATURE_REPORT, buf, 2,
  			 WAC_CMD_RETRIES);

  
  out:
  	kfree(buf);
  	return retval;
  }

  static ssize_t wacom_led_select_store(struct device *dev, int set_id,

  				      const char *buf, size_t count)
  {

  	struct hid_device *hdev = container_of(dev, struct hid_device, dev);

  	struct wacom *wacom = hid_get_drvdata(hdev);

  	unsigned int id;
  	int err;
  
  	err = kstrtouint(buf, 10, &id);
  	if (err)
  		return err;
  
  	mutex_lock(&wacom->lock);

  	wacom->led.select[set_id] = id & 0x3;

  	err = wacom_led_control(wacom);
  
  	mutex_unlock(&wacom->lock);
  
  	return err < 0 ? err : count;
  }

  #define DEVICE_LED_SELECT_ATTR(SET_ID)					\
  static ssize_t wacom_led##SET_ID##_select_store(struct device *dev,	\
  	struct device_attribute *attr, const char *buf, size_t count)	\
  {									\
  	return wacom_led_select_store(dev, SET_ID, buf, count);		\
  }									\

  static ssize_t wacom_led##SET_ID##_select_show(struct device *dev,	\
  	struct device_attribute *attr, char *buf)			\
  {									\

  	struct hid_device *hdev = container_of(dev, struct hid_device, dev);\

  	struct wacom *wacom = hid_get_drvdata(hdev);			\

  	return scnprintf(buf, PAGE_SIZE, "%d
  ",			\
  			 wacom->led.select[SET_ID]);			\

  }									\

  static DEVICE_ATTR(status_led##SET_ID##_select, DEV_ATTR_RW_PERM,	\

  		    wacom_led##SET_ID##_select_show,			\

  		    wacom_led##SET_ID##_select_store)
  
  DEVICE_LED_SELECT_ATTR(0);
  DEVICE_LED_SELECT_ATTR(1);

  
  static ssize_t wacom_luminance_store(struct wacom *wacom, u8 *dest,
  				     const char *buf, size_t count)
  {
  	unsigned int value;
  	int err;
  
  	err = kstrtouint(buf, 10, &value);
  	if (err)
  		return err;
  
  	mutex_lock(&wacom->lock);
  
  	*dest = value & 0x7f;
  	err = wacom_led_control(wacom);
  
  	mutex_unlock(&wacom->lock);
  
  	return err < 0 ? err : count;
  }
  
  #define DEVICE_LUMINANCE_ATTR(name, field)				\
  static ssize_t wacom_##name##_luminance_store(struct device *dev,	\
  	struct device_attribute *attr, const char *buf, size_t count)	\
  {									\

  	struct hid_device *hdev = container_of(dev, struct hid_device, dev);\

  	struct wacom *wacom = hid_get_drvdata(hdev);			\

  									\
  	return wacom_luminance_store(wacom, &wacom->led.field,		\
  				     buf, count);			\
  }									\

  static ssize_t wacom_##name##_luminance_show(struct device *dev,	\
  	struct device_attribute *attr, char *buf)			\
  {									\
  	struct wacom *wacom = dev_get_drvdata(dev);			\
  	return scnprintf(buf, PAGE_SIZE, "%d
  ", wacom->led.field);	\
  }									\

  static DEVICE_ATTR(name##_luminance, DEV_ATTR_RW_PERM,			\

  		   wacom_##name##_luminance_show,			\
  		   wacom_##name##_luminance_store)

  
  DEVICE_LUMINANCE_ATTR(status0, llv);
  DEVICE_LUMINANCE_ATTR(status1, hlv);
  DEVICE_LUMINANCE_ATTR(buttons, img_lum);
  
  static ssize_t wacom_button_image_store(struct device *dev, int button_id,
  					const char *buf, size_t count)
  {

  	struct hid_device *hdev = container_of(dev, struct hid_device, dev);

  	struct wacom *wacom = hid_get_drvdata(hdev);

  	int err;

  	unsigned len;
  	u8 xfer_id;
  
  	if (hdev->bus == BUS_BLUETOOTH) {
  		len = 256;
  		xfer_id = WAC_CMD_ICON_BT_XFER;
  	} else {
  		len = 1024;
  		xfer_id = WAC_CMD_ICON_XFER;
  	}

  	if (count != len)

  		return -EINVAL;
  
  	mutex_lock(&wacom->lock);

  	err = wacom_led_putimage(wacom, button_id, xfer_id, len, buf);

  
  	mutex_unlock(&wacom->lock);
  
  	return err < 0 ? err : count;
  }
  
  #define DEVICE_BTNIMG_ATTR(BUTTON_ID)					\
  static ssize_t wacom_btnimg##BUTTON_ID##_store(struct device *dev,	\
  	struct device_attribute *attr, const char *buf, size_t count)	\
  {									\
  	return wacom_button_image_store(dev, BUTTON_ID, buf, count);	\
  }									\

  static DEVICE_ATTR(button##BUTTON_ID##_rawimg, DEV_ATTR_WO_PERM,	\

  		   NULL, wacom_btnimg##BUTTON_ID##_store)
  
  DEVICE_BTNIMG_ATTR(0);
  DEVICE_BTNIMG_ATTR(1);
  DEVICE_BTNIMG_ATTR(2);
  DEVICE_BTNIMG_ATTR(3);
  DEVICE_BTNIMG_ATTR(4);
  DEVICE_BTNIMG_ATTR(5);
  DEVICE_BTNIMG_ATTR(6);
  DEVICE_BTNIMG_ATTR(7);

  static struct attribute *cintiq_led_attrs[] = {
  	&dev_attr_status_led0_select.attr,
  	&dev_attr_status_led1_select.attr,
  	NULL
  };
  
  static struct attribute_group cintiq_led_attr_group = {
  	.name = "wacom_led",
  	.attrs = cintiq_led_attrs,
  };
  
  static struct attribute *intuos4_led_attrs[] = {

  	&dev_attr_status0_luminance.attr,
  	&dev_attr_status1_luminance.attr,

  	&dev_attr_status_led0_select.attr,

  	&dev_attr_buttons_luminance.attr,
  	&dev_attr_button0_rawimg.attr,
  	&dev_attr_button1_rawimg.attr,
  	&dev_attr_button2_rawimg.attr,
  	&dev_attr_button3_rawimg.attr,
  	&dev_attr_button4_rawimg.attr,
  	&dev_attr_button5_rawimg.attr,
  	&dev_attr_button6_rawimg.attr,
  	&dev_attr_button7_rawimg.attr,
  	NULL
  };

  static struct attribute_group intuos4_led_attr_group = {

  	.name = "wacom_led",

  	.attrs = intuos4_led_attrs,

  };

  static struct attribute *intuos5_led_attrs[] = {
  	&dev_attr_status0_luminance.attr,
  	&dev_attr_status_led0_select.attr,
  	NULL
  };
  
  static struct attribute_group intuos5_led_attr_group = {
  	.name = "wacom_led",
  	.attrs = intuos5_led_attrs,
  };

  static int wacom_initialize_leds(struct wacom *wacom)
  {
  	int error;

  	/* Initialize default values */
  	switch (wacom->wacom_wac.features.type) {

  	case INTUOS4S:

  	case INTUOS4:

  	case INTUOS4WL:

  	case INTUOS4L:
  		wacom->led.select[0] = 0;
  		wacom->led.select[1] = 0;

  		wacom->led.llv = 10;

  		wacom->led.hlv = 20;
  		wacom->led.img_lum = 10;

  		error = sysfs_create_group(&wacom->hdev->dev.kobj,

  					   &intuos4_led_attr_group);
  		break;

  	case WACOM_24HD:

  	case WACOM_21UX2:
  		wacom->led.select[0] = 0;
  		wacom->led.select[1] = 0;
  		wacom->led.llv = 0;
  		wacom->led.hlv = 0;
  		wacom->led.img_lum = 0;

  		error = sysfs_create_group(&wacom->hdev->dev.kobj,

  					   &cintiq_led_attr_group);
  		break;

  	case INTUOS5S:
  	case INTUOS5:
  	case INTUOS5L:

  	case INTUOSPS:
  	case INTUOSPM:
  	case INTUOSPL:

  		if (wacom->wacom_wac.features.device_type == BTN_TOOL_PEN) {
  			wacom->led.select[0] = 0;
  			wacom->led.select[1] = 0;
  			wacom->led.llv = 32;
  			wacom->led.hlv = 0;
  			wacom->led.img_lum = 0;

  			error = sysfs_create_group(&wacom->hdev->dev.kobj,

  						  &intuos5_led_attr_group);
  		} else
  			return 0;

  		break;

  	default:
  		return 0;

  	}

  	if (error) {

  		hid_err(wacom->hdev,

  			"cannot create sysfs group err: %d
  ", error);
  		return error;
  	}
  	wacom_led_control(wacom);

  	wacom->led_initialized = true;

  	return 0;
  }
  
  static void wacom_destroy_leds(struct wacom *wacom)
  {

  	if (!wacom->led_initialized)
  		return;
  
  	wacom->led_initialized = false;

  	switch (wacom->wacom_wac.features.type) {

  	case INTUOS4S:

  	case INTUOS4:

  	case INTUOS4WL:

  	case INTUOS4L:

  		sysfs_remove_group(&wacom->hdev->dev.kobj,

  				   &intuos4_led_attr_group);
  		break;

  	case WACOM_24HD:

  	case WACOM_21UX2:

  		sysfs_remove_group(&wacom->hdev->dev.kobj,

  				   &cintiq_led_attr_group);
  		break;

  
  	case INTUOS5S:
  	case INTUOS5:
  	case INTUOS5L:

  	case INTUOSPS:
  	case INTUOSPM:
  	case INTUOSPL:

  		if (wacom->wacom_wac.features.device_type == BTN_TOOL_PEN)

  			sysfs_remove_group(&wacom->hdev->dev.kobj,

  					   &intuos5_led_attr_group);

  		break;

  	}
  }

  static enum power_supply_property wacom_battery_props[] = {

  	POWER_SUPPLY_PROP_STATUS,

  	POWER_SUPPLY_PROP_SCOPE,

  	POWER_SUPPLY_PROP_CAPACITY
  };

  static enum power_supply_property wacom_ac_props[] = {
  	POWER_SUPPLY_PROP_PRESENT,
  	POWER_SUPPLY_PROP_ONLINE,
  	POWER_SUPPLY_PROP_SCOPE,
  };

  static int wacom_battery_get_property(struct power_supply *psy,
  				      enum power_supply_property psp,
  				      union power_supply_propval *val)
  {
  	struct wacom *wacom = container_of(psy, struct wacom, battery);
  	int ret = 0;
  
  	switch (psp) {

  		case POWER_SUPPLY_PROP_SCOPE:
  			val->intval = POWER_SUPPLY_SCOPE_DEVICE;
  			break;

  		case POWER_SUPPLY_PROP_CAPACITY:
  			val->intval =

  				wacom->wacom_wac.battery_capacity;
  			break;
  		case POWER_SUPPLY_PROP_STATUS:
  			if (wacom->wacom_wac.bat_charging)
  				val->intval = POWER_SUPPLY_STATUS_CHARGING;
  			else if (wacom->wacom_wac.battery_capacity == 100 &&
  				    wacom->wacom_wac.ps_connected)
  				val->intval = POWER_SUPPLY_STATUS_FULL;
  			else
  				val->intval = POWER_SUPPLY_STATUS_DISCHARGING;

  			break;
  		default:
  			ret = -EINVAL;
  			break;
  	}
  
  	return ret;
  }

  static int wacom_ac_get_property(struct power_supply *psy,
  				enum power_supply_property psp,
  				union power_supply_propval *val)
  {
  	struct wacom *wacom = container_of(psy, struct wacom, ac);
  	int ret = 0;
  
  	switch (psp) {
  	case POWER_SUPPLY_PROP_PRESENT:
  		/* fall through */
  	case POWER_SUPPLY_PROP_ONLINE:
  		val->intval = wacom->wacom_wac.ps_connected;
  		break;
  	case POWER_SUPPLY_PROP_SCOPE:
  		val->intval = POWER_SUPPLY_SCOPE_DEVICE;
  		break;
  	default:
  		ret = -EINVAL;
  		break;
  	}
  	return ret;
  }

  static int wacom_initialize_battery(struct wacom *wacom)
  {

  	static atomic_t battery_no = ATOMIC_INIT(0);

  	int error;

  	unsigned long n;

  	if (wacom->wacom_wac.features.quirks & WACOM_QUIRK_BATTERY) {

  		n = atomic_inc_return(&battery_no) - 1;

  		wacom->battery.properties = wacom_battery_props;
  		wacom->battery.num_properties = ARRAY_SIZE(wacom_battery_props);
  		wacom->battery.get_property = wacom_battery_get_property;

  		sprintf(wacom->wacom_wac.bat_name, "wacom_battery_%ld", n);
  		wacom->battery.name = wacom->wacom_wac.bat_name;

  		wacom->battery.type = POWER_SUPPLY_TYPE_BATTERY;
  		wacom->battery.use_for_apm = 0;

  		wacom->ac.properties = wacom_ac_props;
  		wacom->ac.num_properties = ARRAY_SIZE(wacom_ac_props);
  		wacom->ac.get_property = wacom_ac_get_property;
  		sprintf(wacom->wacom_wac.ac_name, "wacom_ac_%ld", n);
  		wacom->ac.name = wacom->wacom_wac.ac_name;
  		wacom->ac.type = POWER_SUPPLY_TYPE_MAINS;
  		wacom->ac.use_for_apm = 0;

  		error = power_supply_register(&wacom->hdev->dev,

  					      &wacom->battery);

  		if (error)
  			return error;
  
  		power_supply_powers(&wacom->battery, &wacom->hdev->dev);

  		error = power_supply_register(&wacom->hdev->dev, &wacom->ac);
  		if (error) {
  			power_supply_unregister(&wacom->battery);
  			return error;
  		}
  
  		power_supply_powers(&wacom->ac, &wacom->hdev->dev);

  	}

  	return 0;

  }
  
  static void wacom_destroy_battery(struct wacom *wacom)
  {

  	if ((wacom->wacom_wac.features.quirks & WACOM_QUIRK_BATTERY) &&
  	     wacom->battery.dev) {

  		power_supply_unregister(&wacom->battery);

  		wacom->battery.dev = NULL;

  		power_supply_unregister(&wacom->ac);
  		wacom->ac.dev = NULL;

  	}

  }

  static ssize_t wacom_show_speed(struct device *dev,
  				struct device_attribute
  				*attr, char *buf)
  {
  	struct hid_device *hdev = container_of(dev, struct hid_device, dev);
  	struct wacom *wacom = hid_get_drvdata(hdev);
  
  	return snprintf(buf, PAGE_SIZE, "%i
  ", wacom->wacom_wac.bt_high_speed);
  }
  
  static ssize_t wacom_store_speed(struct device *dev,
  				struct device_attribute *attr,
  				const char *buf, size_t count)
  {
  	struct hid_device *hdev = container_of(dev, struct hid_device, dev);
  	struct wacom *wacom = hid_get_drvdata(hdev);
  	u8 new_speed;
  
  	if (kstrtou8(buf, 0, &new_speed))
  		return -EINVAL;
  
  	if (new_speed != 0 && new_speed != 1)
  		return -EINVAL;
  
  	wacom_bt_query_tablet_data(hdev, new_speed, &wacom->wacom_wac.features);
  
  	return count;
  }

  static DEVICE_ATTR(speed, DEV_ATTR_RW_PERM,

  		wacom_show_speed, wacom_store_speed);

  static struct input_dev *wacom_allocate_input(struct wacom *wacom)

  {
  	struct input_dev *input_dev;

  	struct hid_device *hdev = wacom->hdev;

  	struct wacom_wac *wacom_wac = &(wacom->wacom_wac);

  
  	input_dev = input_allocate_device();

  	if (!input_dev)
  		return NULL;

  
  	input_dev->name = wacom_wac->name;

  	input_dev->phys = hdev->phys;
  	input_dev->dev.parent = &hdev->dev;

  	input_dev->open = wacom_open;
  	input_dev->close = wacom_close;

  	input_dev->uniq = hdev->uniq;
  	input_dev->id.bustype = hdev->bus;
  	input_dev->id.vendor  = hdev->vendor;

  	input_dev->id.product = wacom_wac->pid ? wacom_wac->pid : hdev->product;

  	input_dev->id.version = hdev->version;

  	input_set_drvdata(input_dev, wacom);

  	return input_dev;
  }

  static void wacom_free_inputs(struct wacom *wacom)

  {

  	struct wacom_wac *wacom_wac = &(wacom->wacom_wac);
  
  	if (wacom_wac->input)
  		input_free_device(wacom_wac->input);
  	if (wacom_wac->pad_input)
  		input_free_device(wacom_wac->pad_input);
  	wacom_wac->input = NULL;
  	wacom_wac->pad_input = NULL;

  }

  static int wacom_allocate_inputs(struct wacom *wacom)

  {
  	struct input_dev *input_dev, *pad_input_dev;
  	struct wacom_wac *wacom_wac = &(wacom->wacom_wac);

  
  	input_dev = wacom_allocate_input(wacom);
  	pad_input_dev = wacom_allocate_input(wacom);
  	if (!input_dev || !pad_input_dev) {

  		wacom_free_inputs(wacom);
  		return -ENOMEM;

  	}

  	wacom_wac->input = input_dev;

  	wacom_wac->pad_input = pad_input_dev;
  	wacom_wac->pad_input->name = wacom_wac->pad_name;

  	return 0;
  }
  
  static void wacom_clean_inputs(struct wacom *wacom)
  {
  	if (wacom->wacom_wac.input) {
  		if (wacom->wacom_wac.input_registered)
  			input_unregister_device(wacom->wacom_wac.input);
  		else
  			input_free_device(wacom->wacom_wac.input);
  	}
  	if (wacom->wacom_wac.pad_input) {

  		if (wacom->wacom_wac.pad_registered)

  			input_unregister_device(wacom->wacom_wac.pad_input);
  		else
  			input_free_device(wacom->wacom_wac.pad_input);
  	}
  	wacom->wacom_wac.input = NULL;
  	wacom->wacom_wac.pad_input = NULL;
  	wacom_destroy_leds(wacom);
  }
  
  static int wacom_register_inputs(struct wacom *wacom)
  {
  	struct input_dev *input_dev, *pad_input_dev;
  	struct wacom_wac *wacom_wac = &(wacom->wacom_wac);
  	int error;
  
  	input_dev = wacom_wac->input;
  	pad_input_dev = wacom_wac->pad_input;
  
  	if (!input_dev || !pad_input_dev)
  		return -EINVAL;

  	error = wacom_setup_pentouch_input_capabilities(input_dev, wacom_wac);
  	if (!error) {
  		error = input_register_device(input_dev);
  		if (error)
  			return error;

  		wacom_wac->input_registered = true;

  	}

  	error = wacom_setup_pad_input_capabilities(pad_input_dev, wacom_wac);
  	if (error) {
  		/* no pad in use on this interface */
  		input_free_device(pad_input_dev);
  		wacom_wac->pad_input = NULL;
  		pad_input_dev = NULL;
  	} else {
  		error = input_register_device(pad_input_dev);
  		if (error)

  			goto fail_register_pad_input;

  		wacom_wac->pad_registered = true;

  
  		error = wacom_initialize_leds(wacom);
  		if (error)

  			goto fail_leds;

  	}

  	return 0;

  fail_leds:

  	input_unregister_device(pad_input_dev);
  	pad_input_dev = NULL;

  	wacom_wac->pad_registered = false;

  fail_register_pad_input:

  	input_unregister_device(input_dev);

  	wacom_wac->input = NULL;

  	wacom_wac->input_registered = false;

  	return error;
  }

  static void wacom_wireless_work(struct work_struct *work)
  {
  	struct wacom *wacom = container_of(work, struct wacom, work);
  	struct usb_device *usbdev = wacom->usbdev;
  	struct wacom_wac *wacom_wac = &wacom->wacom_wac;

  	struct hid_device *hdev1, *hdev2;

  	struct wacom *wacom1, *wacom2;
  	struct wacom_wac *wacom_wac1, *wacom_wac2;
  	int error;

  
  	/*
  	 * Regardless if this is a disconnect or a new tablet,

  	 * remove any existing input and battery devices.

  	 */

  	wacom_destroy_battery(wacom);

  	/* Stylus interface */

  	hdev1 = usb_get_intfdata(usbdev->config->interface[1]);
  	wacom1 = hid_get_drvdata(hdev1);

  	wacom_wac1 = &(wacom1->wacom_wac);

  	wacom_clean_inputs(wacom1);

  
  	/* Touch interface */

  	hdev2 = usb_get_intfdata(usbdev->config->interface[2]);
  	wacom2 = hid_get_drvdata(hdev2);

  	wacom_wac2 = &(wacom2->wacom_wac);

  	wacom_clean_inputs(wacom2);

  
  	if (wacom_wac->pid == 0) {

  		hid_info(wacom->hdev, "wireless tablet disconnected
  ");

  		wacom_wac1->shared->type = 0;

  	} else {

  		const struct hid_device_id *id = wacom_ids;

  		hid_info(wacom->hdev, "wireless tablet connected with PID %x
  ",

  			 wacom_wac->pid);

  		while (id->bus) {
  			if (id->vendor == USB_VENDOR_ID_WACOM &&
  			    id->product == wacom_wac->pid)

  				break;
  			id++;
  		}

  		if (!id->bus) {

  			hid_info(wacom->hdev, "ignoring unknown PID.
  ");

  			return;
  		}
  
  		/* Stylus interface */

  		wacom_wac1->features =

  			*((struct wacom_features *)id->driver_data);

  		wacom_wac1->features.device_type = BTN_TOOL_PEN;

  		snprintf(wacom_wac1->name, WACOM_NAME_MAX, "%s (WL) Pen",
  			 wacom_wac1->features.name);

  		snprintf(wacom_wac1->pad_name, WACOM_NAME_MAX, "%s (WL) Pad",
  			 wacom_wac1->features.name);

  		wacom_wac1->shared->touch_max = wacom_wac1->features.touch_max;
  		wacom_wac1->shared->type = wacom_wac1->features.type;

  		wacom_wac1->pid = wacom_wac->pid;

  		error = wacom_allocate_inputs(wacom1) ||
  			wacom_register_inputs(wacom1);

  		if (error)

  			goto fail;

  
  		/* Touch interface */

  		if (wacom_wac1->features.touch_max ||
  		    wacom_wac1->features.type == INTUOSHT) {

  			wacom_wac2->features =

  				*((struct wacom_features *)id->driver_data);

  			wacom_wac2->features.pktlen = WACOM_PKGLEN_BBTOUCH3;
  			wacom_wac2->features.device_type = BTN_TOOL_FINGER;
  			wacom_wac2->features.x_max = wacom_wac2->features.y_max = 4096;
  			if (wacom_wac2->features.touch_max)
  				snprintf(wacom_wac2->name, WACOM_NAME_MAX,
  					 "%s (WL) Finger",wacom_wac2->features.name);
  			else
  				snprintf(wacom_wac2->name, WACOM_NAME_MAX,
  					 "%s (WL) Pad",wacom_wac2->features.name);

  			snprintf(wacom_wac2->pad_name, WACOM_NAME_MAX,
  				 "%s (WL) Pad", wacom_wac2->features.name);

  			wacom_wac2->pid = wacom_wac->pid;

  			error = wacom_allocate_inputs(wacom2) ||
  				wacom_register_inputs(wacom2);

  			if (error)
  				goto fail;

  
  			if (wacom_wac1->features.type == INTUOSHT &&
  			    wacom_wac1->features.touch_max)
  				wacom_wac->shared->touch_input = wacom_wac2->input;

  		}

  
  		error = wacom_initialize_battery(wacom);
  		if (error)

  			goto fail;

  	}

  
  	return;

  fail:

  	wacom_clean_inputs(wacom1);
  	wacom_clean_inputs(wacom2);

  	return;

  }

  /*
   * Not all devices report physical dimensions from HID.
   * Compute the default from hardcoded logical dimension
   * and resolution before driver overwrites them.
   */
  static void wacom_set_default_phy(struct wacom_features *features)
  {
  	if (features->x_resolution) {
  		features->x_phy = (features->x_max * 100) /
  					features->x_resolution;
  		features->y_phy = (features->y_max * 100) /
  					features->y_resolution;
  	}
  }
  
  static void wacom_calculate_res(struct wacom_features *features)
  {
  	features->x_resolution = wacom_calc_hid_res(features->x_max,
  						    features->x_phy,
  						    features->unit,
  						    features->unitExpo);
  	features->y_resolution = wacom_calc_hid_res(features->y_max,
  						    features->y_phy,
  						    features->unit,
  						    features->unitExpo);
  }

  static size_t wacom_compute_pktlen(struct hid_device *hdev)
  {
  	struct hid_report_enum *report_enum;
  	struct hid_report *report;
  	size_t size = 0;
  
  	report_enum = hdev->report_enum + HID_INPUT_REPORT;
  
  	list_for_each_entry(report, &report_enum->report_list, list) {

  		size_t report_size = hid_report_len(report);

  		if (report_size > size)
  			size = report_size;
  	}
  
  	return size;
  }

  static int wacom_probe(struct hid_device *hdev,
  		const struct hid_device_id *id)

  {

  	struct usb_interface *intf = to_usb_interface(hdev->dev.parent);

  	struct usb_device *dev = interface_to_usbdev(intf);

  	struct wacom *wacom;
  	struct wacom_wac *wacom_wac;

  	struct wacom_features *features;

  	int error;

  	unsigned int connect_mask = HID_CONNECT_HIDRAW;

  	if (!id->driver_data)

  		return -EINVAL;

  	hdev->quirks |= HID_QUIRK_NO_INIT_REPORTS;

  	wacom = kzalloc(sizeof(struct wacom), GFP_KERNEL);

  	if (!wacom)
  		return -ENOMEM;

  	hid_set_drvdata(hdev, wacom);
  	wacom->hdev = hdev;

  	/* ask for the report descriptor to be loaded by HID */
  	error = hid_parse(hdev);
  	if (error) {
  		hid_err(hdev, "parse failed
  ");

  		goto fail_parse;

  	}

  	wacom_wac = &wacom->wacom_wac;

  	wacom_wac->features = *((struct wacom_features *)id->driver_data);

  	features = &wacom_wac->features;

  	features->pktlen = wacom_compute_pktlen(hdev);

  	if (features->pktlen > WACOM_PKGLEN_MAX) {
  		error = -EINVAL;

  		goto fail_pktlen;

  	}

  	if (features->check_for_hid_type && features->hid_type != hdev->type) {
  		error = -ENODEV;

  		goto fail_type;

  	}

  	wacom->usbdev = dev;

  	wacom->intf = intf;
  	mutex_init(&wacom->lock);

  	INIT_WORK(&wacom->work, wacom_wireless_work);

  	if (!(features->quirks & WACOM_QUIRK_NO_INPUT)) {
  		error = wacom_allocate_inputs(wacom);
  		if (error)
  			goto fail_allocate_inputs;
  	}

  	/* set the default size in case we do not get them from hid */
  	wacom_set_default_phy(features);

  	/* Retrieve the physical and logical size for touch devices */

  	wacom_retrieve_hid_descriptor(hdev, features);

  	/*
  	 * Intuos5 has no useful data about its touch interface in its

  	 * HID descriptor. If this is the touch interface (PacketSize

  	 * of WACOM_PKGLEN_BBTOUCH3), override the table values.
  	 */

  	if (features->type >= INTUOS5S && features->type <= INTUOSHT) {

  		if (features->pktlen == WACOM_PKGLEN_BBTOUCH3) {

  			features->device_type = BTN_TOOL_FINGER;

  			features->x_max = 4096;
  			features->y_max = 4096;
  		} else {
  			features->device_type = BTN_TOOL_PEN;
  		}
  	}

  	/*
  	 * Same thing for Bamboo 3rd gen.
  	 */
  	if ((features->type == BAMBOO_PT) &&
  	    (features->pktlen == WACOM_PKGLEN_BBTOUCH3) &&
  	    (features->device_type == BTN_TOOL_PEN)) {
  		features->device_type = BTN_TOOL_FINGER;
  
  		features->x_max = 4096;
  		features->y_max = 4096;
  	}

  	if (hdev->bus == BUS_BLUETOOTH)
  		features->quirks |= WACOM_QUIRK_BATTERY;

  	wacom_setup_device_quirks(features);

  	/* set unit to "100th of a mm" for devices not reported by HID */
  	if (!features->unit) {
  		features->unit = 0x11;

  		features->unitExpo = -3;

  	}
  	wacom_calculate_res(features);

  	strlcpy(wacom_wac->name, features->name, sizeof(wacom_wac->name));

  	snprintf(wacom_wac->pad_name, sizeof(wacom_wac->pad_name),
  		"%s Pad", features->name);

  	if (features->quirks & WACOM_QUIRK_MULTI_INPUT) {

  		/* Append the device type to the name */

  		if (features->device_type != BTN_TOOL_FINGER)
  			strlcat(wacom_wac->name, " Pen", WACOM_NAME_MAX);
  		else if (features->touch_max)
  			strlcat(wacom_wac->name, " Finger", WACOM_NAME_MAX);
  		else
  			strlcat(wacom_wac->name, " Pad", WACOM_NAME_MAX);

  		error = wacom_add_shared_data(hdev);

  		if (error)

  			goto fail_shared_data;

  	}

  	if (!(features->quirks & WACOM_QUIRK_MONITOR) &&
  	     (features->quirks & WACOM_QUIRK_BATTERY)) {
  		error = wacom_initialize_battery(wacom);
  		if (error)

  			goto fail_battery;

  	}

  	if (!(features->quirks & WACOM_QUIRK_NO_INPUT)) {

  		error = wacom_register_inputs(wacom);

  		if (error)

  			goto fail_register_inputs;

  	}
  
  	if (hdev->bus == BUS_BLUETOOTH) {
  		error = device_create_file(&hdev->dev, &dev_attr_speed);
  		if (error)
  			hid_warn(hdev,
  				 "can't create sysfs speed attribute err: %d
  ",
  				 error);

  	}

  	if (features->type == HID_GENERIC)
  		connect_mask |= HID_CONNECT_DRIVER;

  	/* Regular HID work starts now */

  	error = hid_hw_start(hdev, connect_mask);

  	if (error) {
  		hid_err(hdev, "hw start failed
  ");

  		goto fail_hw_start;

  	}

  	/* Note that if query fails it is not a hard failure */
  	wacom_query_tablet_data(hdev, features);

  	if (features->quirks & WACOM_QUIRK_MONITOR)
  		error = hid_hw_open(hdev);

  	if (wacom_wac->features.type == INTUOSHT && wacom_wac->features.touch_max) {
  		if (wacom_wac->features.device_type == BTN_TOOL_FINGER)
  			wacom_wac->shared->touch_input = wacom_wac->input;
  	}

  	return 0;

  fail_hw_start:

  	if (hdev->bus == BUS_BLUETOOTH)

  		device_remove_file(&hdev->dev, &dev_attr_speed);

  fail_register_inputs:

  	wacom_clean_inputs(wacom);

  	wacom_destroy_battery(wacom);
  fail_battery:
  	wacom_remove_shared_data(wacom_wac);
  fail_shared_data:

  	wacom_clean_inputs(wacom);
  fail_allocate_inputs:

  fail_type:
  fail_pktlen:
  fail_parse:
  	kfree(wacom);

  	hid_set_drvdata(hdev, NULL);

  	return error;

  }

  static void wacom_remove(struct hid_device *hdev)

  {

  	struct wacom *wacom = hid_get_drvdata(hdev);

  	hid_hw_stop(hdev);

  	cancel_work_sync(&wacom->work);

  	wacom_clean_inputs(wacom);

  	if (hdev->bus == BUS_BLUETOOTH)
  		device_remove_file(&hdev->dev, &dev_attr_speed);

  	wacom_destroy_battery(wacom);

  	wacom_remove_shared_data(&wacom->wacom_wac);

  	hid_set_drvdata(hdev, NULL);
  	kfree(wacom);

  }

  #ifdef CONFIG_PM

  static int wacom_resume(struct hid_device *hdev)

  {

  	struct wacom *wacom = hid_get_drvdata(hdev);

  	struct wacom_features *features = &wacom->wacom_wac.features;

  
  	mutex_lock(&wacom->lock);

  
  	/* switch to wacom mode first */

  	wacom_query_tablet_data(hdev, features);

  	wacom_led_control(wacom);

  	mutex_unlock(&wacom->lock);

  	return 0;

  }

  static int wacom_reset_resume(struct hid_device *hdev)

  {

  	return wacom_resume(hdev);

  }

  #endif /* CONFIG_PM */

  static struct hid_driver wacom_driver = {

  	.name =		"wacom",

  	.id_table =	wacom_ids,

  	.probe =	wacom_probe,

  	.remove =	wacom_remove,

  	.event =	wacom_wac_event,
  	.report =	wacom_wac_report,

  #ifdef CONFIG_PM

  	.resume =	wacom_resume,
  	.reset_resume =	wacom_reset_resume,

  #endif
  	.raw_event =	wacom_raw_event,

  };

  module_hid_driver(wacom_driver);

  
  MODULE_VERSION(DRIVER_VERSION);
  MODULE_AUTHOR(DRIVER_AUTHOR);
  MODULE_DESCRIPTION(DRIVER_DESC);
  MODULE_LICENSE(DRIVER_LICENSE);