drivers/hid/hid-uclogic-core.c - SHIFTPHONES/mainline/linux - Gitiles

 // SPDX-License-Identifier: GPL-2.0+
 /*
  *  HID driver for UC-Logic devices not fully compliant with HID standard
  *
  *  Copyright (c) 2010-2014 Nikolai Kondrashov
  *  Copyright (c) 2013 Martin Rusko
  */

 /*
  * 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 <linux/device.h>
 #include <linux/hid.h>
 #include <linux/module.h>
 #include <linux/timer.h>
 #include "usbhid/usbhid.h"
 #include "hid-uclogic-params.h"

 #include "hid-ids.h"

 /* Driver data */
 struct uclogic_drvdata {
 	/* Interface parameters */
 	struct uclogic_params params;
 	/* Pointer to the replacement report descriptor. NULL if none. */
 	__u8 *desc_ptr;
 	/*
 	 * Size of the replacement report descriptor.
 	 * Only valid if desc_ptr is not NULL
 	 */
 	unsigned int desc_size;
 	/* Pen input device */
 	struct input_dev *pen_input;
 	/* In-range timer */
 	struct timer_list inrange_timer;
 	/* Last rotary encoder state, or U8_MAX for none */
 	u8 re_state;
 };

 /**
  * uclogic_inrange_timeout - handle pen in-range state timeout.
  * Emulate input events normally generated when pen goes out of range for
  * tablets which don't report that.
  *
  * @t:	The timer the timeout handler is attached to, stored in a struct
  *	uclogic_drvdata.
  */
 static void uclogic_inrange_timeout(struct timer_list *t)
 {
 	struct uclogic_drvdata *drvdata = from_timer(drvdata, t,
 							inrange_timer);
 	struct input_dev *input = drvdata->pen_input;

 	if (input == NULL)
 		return;
 	input_report_abs(input, ABS_PRESSURE, 0);
 	/* If BTN_TOUCH state is changing */
 	if (test_bit(BTN_TOUCH, input->key)) {
 		input_event(input, EV_MSC, MSC_SCAN,
 				/* Digitizer Tip Switch usage */
 				0xd0042);
 		input_report_key(input, BTN_TOUCH, 0);
 	}
 	input_report_key(input, BTN_TOOL_PEN, 0);
 	input_sync(input);
 }

 static __u8 *uclogic_report_fixup(struct hid_device *hdev, __u8 *rdesc,
 					unsigned int *rsize)
 {
 	struct uclogic_drvdata *drvdata = hid_get_drvdata(hdev);

 	if (drvdata->desc_ptr != NULL) {
 		rdesc = drvdata->desc_ptr;
 		*rsize = drvdata->desc_size;
 	}
 	return rdesc;
 }

 static int uclogic_input_mapping(struct hid_device *hdev,
 				 struct hid_input *hi,
 				 struct hid_field *field,
 				 struct hid_usage *usage,
 				 unsigned long **bit,
 				 int *max)
 {
 	struct uclogic_drvdata *drvdata = hid_get_drvdata(hdev);
 	struct uclogic_params *params = &drvdata->params;

 	/* discard the unused pen interface */
 	if (params->pen_unused && (field->application == HID_DG_PEN))
 		return -1;

 	/* let hid-core decide what to do */
 	return 0;
 }

 static int uclogic_input_configured(struct hid_device *hdev,
 		struct hid_input *hi)
 {
 	struct uclogic_drvdata *drvdata = hid_get_drvdata(hdev);
 	struct uclogic_params *params = &drvdata->params;
 	char *name;
 	const char *suffix = NULL;
 	struct hid_field *field;
 	size_t len;

 	/* no report associated (HID_QUIRK_MULTI_INPUT not set) */
 	if (!hi->report)
 		return 0;

 	/*
 	 * If this is the input corresponding to the pen report
 	 * in need of tweaking.
 	 */
 	if (hi->report->id == params->pen.id) {
 		/* Remember the input device so we can simulate events */
 		drvdata->pen_input = hi->input;
 	}

 	field = hi->report->field[0];

 	switch (field->application) {
 	case HID_GD_KEYBOARD:
 		suffix = "Keyboard";
 		break;
 	case HID_GD_MOUSE:
 		suffix = "Mouse";
 		break;
 	case HID_GD_KEYPAD:
 		suffix = "Pad";
 		break;
 	case HID_DG_PEN:
 		suffix = "Pen";
 		break;
 	case HID_CP_CONSUMER_CONTROL:
 		suffix = "Consumer Control";
 		break;
 	case HID_GD_SYSTEM_CONTROL:
 		suffix = "System Control";
 		break;
 	}

 	if (suffix) {
 		len = strlen(hdev->name) + 2 + strlen(suffix);
 		name = devm_kzalloc(&hi->input->dev, len, GFP_KERNEL);
 		if (name) {
 			snprintf(name, len, "%s %s", hdev->name, suffix);
 			hi->input->name = name;
 		}
 	}

 	return 0;
 }

 static int uclogic_probe(struct hid_device *hdev,
 		const struct hid_device_id *id)
 {
 	int rc;
 	struct uclogic_drvdata *drvdata = NULL;
 	bool params_initialized = false;

 	if (!hid_is_usb(hdev))
 		return -EINVAL;

 	/*
 	 * libinput requires the pad interface to be on a different node
 	 * than the pen, so use QUIRK_MULTI_INPUT for all tablets.
 	 */
 	hdev->quirks |= HID_QUIRK_MULTI_INPUT;

 	/* Allocate and assign driver data */
 	drvdata = devm_kzalloc(&hdev->dev, sizeof(*drvdata), GFP_KERNEL);
 	if (drvdata == NULL) {
 		rc = -ENOMEM;
 		goto failure;
 	}
 	timer_setup(&drvdata->inrange_timer, uclogic_inrange_timeout, 0);
 	drvdata->re_state = U8_MAX;
 	hid_set_drvdata(hdev, drvdata);

 	/* Initialize the device and retrieve interface parameters */
 	rc = uclogic_params_init(&drvdata->params, hdev);
 	if (rc != 0) {
 		hid_err(hdev, "failed probing parameters: %d\n", rc);
 		goto failure;
 	}
 	params_initialized = true;
 	hid_dbg(hdev, "parameters:\n" UCLOGIC_PARAMS_FMT_STR,
 		UCLOGIC_PARAMS_FMT_ARGS(&drvdata->params));
 	if (drvdata->params.invalid) {
 		hid_info(hdev, "interface is invalid, ignoring\n");
 		rc = -ENODEV;
 		goto failure;
 	}

 	/* Generate replacement report descriptor */
 	rc = uclogic_params_get_desc(&drvdata->params,
 				     &drvdata->desc_ptr,
 				     &drvdata->desc_size);
 	if (rc) {
 		hid_err(hdev,
 			"failed generating replacement report descriptor: %d\n",
 			rc);
 		goto failure;
 	}

 	rc = hid_parse(hdev);
 	if (rc) {
 		hid_err(hdev, "parse failed\n");
 		goto failure;
 	}

 	rc = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
 	if (rc) {
 		hid_err(hdev, "hw start failed\n");
 		goto failure;
 	}

 	return 0;
 failure:
 	/* Assume "remove" might not be called if "probe" failed */
 	if (params_initialized)
 		uclogic_params_cleanup(&drvdata->params);
 	return rc;
 }

 #ifdef CONFIG_PM
 static int uclogic_resume(struct hid_device *hdev)
 {
 	int rc;
 	struct uclogic_params params;

 	/* Re-initialize the device, but discard parameters */
 	rc = uclogic_params_init(&params, hdev);
 	if (rc != 0)
 		hid_err(hdev, "failed to re-initialize the device\n");
 	else
 		uclogic_params_cleanup(&params);

 	return rc;
 }
 #endif

 static int uclogic_raw_event(struct hid_device *hdev,
 				struct hid_report *report,
 				u8 *data, int size)
 {
 	struct uclogic_drvdata *drvdata = hid_get_drvdata(hdev);
 	struct uclogic_params *params = &drvdata->params;

 	/* Tweak pen reports, if necessary */
 	if (!params->pen_unused &&
 	    (report->type == HID_INPUT_REPORT) &&
 	    (report->id == params->pen.id) &&
 	    (size >= 2)) {
 		/* If it's the "virtual" frame controls report */
 		if (params->frame.id != 0 &&
 		    data[1] & params->pen_frame_flag) {
 			/* Change to virtual frame controls report ID */
 			data[0] = params->frame.id;
 			return 0;
 		}
 		/* If in-range reports are inverted */
 		if (params->pen.inrange ==
 			UCLOGIC_PARAMS_PEN_INRANGE_INVERTED) {
 			/* Invert the in-range bit */
 			data[1] ^= 0x40;
 		}
 		/*
 		 * If report contains fragmented high-resolution pen
 		 * coordinates
 		 */
 		if (size >= 10 && params->pen.fragmented_hires) {
 			u8 pressure_low_byte;
 			u8 pressure_high_byte;

 			/* Lift pressure bytes */
 			pressure_low_byte = data[6];
 			pressure_high_byte = data[7];
 			/*
 			 * Move Y coord to make space for high-order X
 			 * coord byte
 			 */
 			data[6] = data[5];
 			data[5] = data[4];
 			/* Move high-order X coord byte */
 			data[4] = data[8];
 			/* Move high-order Y coord byte */
 			data[7] = data[9];
 			/* Place pressure bytes */
 			data[8] = pressure_low_byte;
 			data[9] = pressure_high_byte;
 		}
 		/* If we need to emulate in-range detection */
 		if (params->pen.inrange == UCLOGIC_PARAMS_PEN_INRANGE_NONE) {
 			/* Set in-range bit */
 			data[1] |= 0x40;
 			/* (Re-)start in-range timeout */
 			mod_timer(&drvdata->inrange_timer,
 					jiffies + msecs_to_jiffies(100));
 		}
 	}

 	/* Tweak frame control reports, if necessary */
 	if ((report->type == HID_INPUT_REPORT) &&
 	    (report->id == params->frame.id)) {
 		/* If need to, and can, set pad device ID for Wacom drivers */
 		if (params->frame.dev_id_byte > 0 &&
 		    params->frame.dev_id_byte < size) {
 			data[params->frame.dev_id_byte] = 0xf;
 		}
 		/* If need to, and can, read rotary encoder state change */
 		if (params->frame.re_lsb > 0 &&
 		    params->frame.re_lsb / 8 < size) {
 			unsigned int byte = params->frame.re_lsb / 8;
 			unsigned int bit = params->frame.re_lsb % 8;

 			u8 change;
 			u8 prev_state = drvdata->re_state;
 			/* Read Gray-coded state */
 			u8 state = (data[byte] >> bit) & 0x3;
 			/* Encode state change into 2-bit signed integer */
 			if ((prev_state == 1 && state == 0) ||
 			    (prev_state == 2 && state == 3)) {
 				change = 1;
 			} else if ((prev_state == 2 && state == 0) ||
 				   (prev_state == 1 && state == 3)) {
 				change = 3;
 			} else {
 				change = 0;
 			}
 			/* Write change */
 			data[byte] = (data[byte] & ~((u8)3 << bit)) |
 					(change << bit);
 			/* Remember state */
 			drvdata->re_state = state;
 		}
 	}

 	return 0;
 }

 static void uclogic_remove(struct hid_device *hdev)
 {
 	struct uclogic_drvdata *drvdata = hid_get_drvdata(hdev);

 	del_timer_sync(&drvdata->inrange_timer);
 	hid_hw_stop(hdev);
 	kfree(drvdata->desc_ptr);
 	uclogic_params_cleanup(&drvdata->params);
 }

 static const struct hid_device_id uclogic_devices[] = {
 	{ HID_USB_DEVICE(USB_VENDOR_ID_UCLOGIC,
 				USB_DEVICE_ID_UCLOGIC_TABLET_PF1209) },
 	{ HID_USB_DEVICE(USB_VENDOR_ID_UCLOGIC,
 				USB_DEVICE_ID_UCLOGIC_TABLET_WP4030U) },
 	{ HID_USB_DEVICE(USB_VENDOR_ID_UCLOGIC,
 				USB_DEVICE_ID_UCLOGIC_TABLET_WP5540U) },
 	{ HID_USB_DEVICE(USB_VENDOR_ID_UCLOGIC,
 				USB_DEVICE_ID_UCLOGIC_TABLET_WP8060U) },
 	{ HID_USB_DEVICE(USB_VENDOR_ID_UCLOGIC,
 				USB_DEVICE_ID_UCLOGIC_TABLET_WP1062) },
 	{ HID_USB_DEVICE(USB_VENDOR_ID_UCLOGIC,
 				USB_DEVICE_ID_UCLOGIC_WIRELESS_TABLET_TWHL850) },
 	{ HID_USB_DEVICE(USB_VENDOR_ID_UCLOGIC,
 				USB_DEVICE_ID_UCLOGIC_TABLET_TWHA60) },
 	{ HID_USB_DEVICE(USB_VENDOR_ID_HUION,
 				USB_DEVICE_ID_HUION_TABLET) },
 	{ HID_USB_DEVICE(USB_VENDOR_ID_HUION,
 				USB_DEVICE_ID_HUION_HS64) },
 	{ HID_USB_DEVICE(USB_VENDOR_ID_TRUST,
 				USB_DEVICE_ID_TRUST_PANORA_TABLET) },
 	{ HID_USB_DEVICE(USB_VENDOR_ID_UCLOGIC,
 				USB_DEVICE_ID_HUION_TABLET) },
 	{ HID_USB_DEVICE(USB_VENDOR_ID_UCLOGIC,
 				USB_DEVICE_ID_YIYNOVA_TABLET) },
 	{ HID_USB_DEVICE(USB_VENDOR_ID_UCLOGIC,
 				USB_DEVICE_ID_UCLOGIC_UGEE_TABLET_81) },
 	{ HID_USB_DEVICE(USB_VENDOR_ID_UCLOGIC,
 				USB_DEVICE_ID_UCLOGIC_UGEE_TABLET_45) },
 	{ HID_USB_DEVICE(USB_VENDOR_ID_UCLOGIC,
 				USB_DEVICE_ID_UCLOGIC_UGEE_TABLET_47) },
 	{ HID_USB_DEVICE(USB_VENDOR_ID_UCLOGIC,
 				USB_DEVICE_ID_UCLOGIC_DRAWIMAGE_G3) },
 	{ HID_USB_DEVICE(USB_VENDOR_ID_UGTIZER,
 				USB_DEVICE_ID_UGTIZER_TABLET_GP0610) },
 	{ HID_USB_DEVICE(USB_VENDOR_ID_UGTIZER,
 				USB_DEVICE_ID_UGTIZER_TABLET_GT5040) },
 	{ HID_USB_DEVICE(USB_VENDOR_ID_UGEE,
 				USB_DEVICE_ID_UGEE_TABLET_G5) },
 	{ HID_USB_DEVICE(USB_VENDOR_ID_UGEE,
 				USB_DEVICE_ID_UGEE_TABLET_EX07S) },
 	{ HID_USB_DEVICE(USB_VENDOR_ID_UGEE,
 				USB_DEVICE_ID_UGEE_TABLET_RAINBOW_CV720) },
 	{ HID_USB_DEVICE(USB_VENDOR_ID_UGEE,
 				USB_DEVICE_ID_UGEE_XPPEN_TABLET_G540) },
 	{ HID_USB_DEVICE(USB_VENDOR_ID_UGEE,
 				USB_DEVICE_ID_UGEE_XPPEN_TABLET_G640) },
 	{ HID_USB_DEVICE(USB_VENDOR_ID_UGEE,
 				USB_DEVICE_ID_UGEE_XPPEN_TABLET_DECO01) },
 	{ }
 };
 MODULE_DEVICE_TABLE(hid, uclogic_devices);

 static struct hid_driver uclogic_driver = {
 	.name = "uclogic",
 	.id_table = uclogic_devices,
 	.probe = uclogic_probe,
 	.remove = uclogic_remove,
 	.report_fixup = uclogic_report_fixup,
 	.raw_event = uclogic_raw_event,
 	.input_mapping = uclogic_input_mapping,
 	.input_configured = uclogic_input_configured,
 #ifdef CONFIG_PM
 	.resume	          = uclogic_resume,
 	.reset_resume     = uclogic_resume,
 #endif
 };
 module_hid_driver(uclogic_driver);

 MODULE_AUTHOR("Martin Rusko");
 MODULE_AUTHOR("Nikolai Kondrashov");
 MODULE_LICENSE("GPL");
	// SPDX-License-Identifier: GPL-2.0+
	/*
	* HID driver for UC-Logic devices not fully compliant with HID standard
	*
	* Copyright (c) 2010-2014 Nikolai Kondrashov
	* Copyright (c) 2013 Martin Rusko
	*/

	/*
	* 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 <linux/device.h>
	#include <linux/hid.h>
	#include <linux/module.h>
	#include <linux/timer.h>
	#include "usbhid/usbhid.h"
	#include "hid-uclogic-params.h"

	#include "hid-ids.h"

	/* Driver data */
	struct uclogic_drvdata {
	/* Interface parameters */
	struct uclogic_params params;
	/* Pointer to the replacement report descriptor. NULL if none. */
	__u8 *desc_ptr;
	/*
	* Size of the replacement report descriptor.
	* Only valid if desc_ptr is not NULL
	*/
	unsigned int desc_size;
	/* Pen input device */
	struct input_dev *pen_input;
	/* In-range timer */
	struct timer_list inrange_timer;
	/* Last rotary encoder state, or U8_MAX for none */
	u8 re_state;
	};

	/**
	* uclogic_inrange_timeout - handle pen in-range state timeout.
	* Emulate input events normally generated when pen goes out of range for
	* tablets which don't report that.
	*
	* @t: The timer the timeout handler is attached to, stored in a struct
	* uclogic_drvdata.
	*/
	static void uclogic_inrange_timeout(struct timer_list *t)
	{
	struct uclogic_drvdata *drvdata = from_timer(drvdata, t,
	inrange_timer);
	struct input_dev *input = drvdata->pen_input;

	if (input == NULL)
	return;
	input_report_abs(input, ABS_PRESSURE, 0);
	/* If BTN_TOUCH state is changing */
	if (test_bit(BTN_TOUCH, input->key)) {
	input_event(input, EV_MSC, MSC_SCAN,
	/* Digitizer Tip Switch usage */
	0xd0042);
	input_report_key(input, BTN_TOUCH, 0);
	}
	input_report_key(input, BTN_TOOL_PEN, 0);
	input_sync(input);
	}

	static __u8 uclogic_report_fixup(struct hid_device hdev, __u8 *rdesc,
	unsigned int *rsize)
	{
	struct uclogic_drvdata *drvdata = hid_get_drvdata(hdev);

	if (drvdata->desc_ptr != NULL) {
	rdesc = drvdata->desc_ptr;
	*rsize = drvdata->desc_size;
	}
	return rdesc;
	}

	static int uclogic_input_mapping(struct hid_device *hdev,
	struct hid_input *hi,
	struct hid_field *field,
	struct hid_usage *usage,
	unsigned long **bit,
	int *max)
	{
	struct uclogic_drvdata *drvdata = hid_get_drvdata(hdev);
	struct uclogic_params *params = &drvdata->params;

	/* discard the unused pen interface */
	if (params->pen_unused && (field->application == HID_DG_PEN))
	return -1;

	/* let hid-core decide what to do */
	return 0;
	}

	static int uclogic_input_configured(struct hid_device *hdev,
	struct hid_input *hi)
	{
	struct uclogic_drvdata *drvdata = hid_get_drvdata(hdev);
	struct uclogic_params *params = &drvdata->params;
	char *name;
	const char *suffix = NULL;
	struct hid_field *field;
	size_t len;

	/* no report associated (HID_QUIRK_MULTI_INPUT not set) */
	if (!hi->report)
	return 0;

	/*
	* If this is the input corresponding to the pen report
	* in need of tweaking.
	*/
	if (hi->report->id == params->pen.id) {
	/* Remember the input device so we can simulate events */
	drvdata->pen_input = hi->input;
	}

	field = hi->report->field[0];

	switch (field->application) {
	case HID_GD_KEYBOARD:
	suffix = "Keyboard";
	break;
	case HID_GD_MOUSE:
	suffix = "Mouse";
	break;
	case HID_GD_KEYPAD:
	suffix = "Pad";
	break;
	case HID_DG_PEN:
	suffix = "Pen";
	break;
	case HID_CP_CONSUMER_CONTROL:
	suffix = "Consumer Control";
	break;
	case HID_GD_SYSTEM_CONTROL:
	suffix = "System Control";
	break;
	}

	if (suffix) {
	len = strlen(hdev->name) + 2 + strlen(suffix);
	name = devm_kzalloc(&hi->input->dev, len, GFP_KERNEL);
	if (name) {
	snprintf(name, len, "%s %s", hdev->name, suffix);
	hi->input->name = name;
	}
	}

	return 0;
	}

	static int uclogic_probe(struct hid_device *hdev,
	const struct hid_device_id *id)
	{
	int rc;
	struct uclogic_drvdata *drvdata = NULL;
	bool params_initialized = false;

	if (!hid_is_usb(hdev))
	return -EINVAL;

	/*
	* libinput requires the pad interface to be on a different node
	* than the pen, so use QUIRK_MULTI_INPUT for all tablets.
	*/
	hdev->quirks \|= HID_QUIRK_MULTI_INPUT;

	/* Allocate and assign driver data */
	drvdata = devm_kzalloc(&hdev->dev, sizeof(*drvdata), GFP_KERNEL);
	if (drvdata == NULL) {
	rc = -ENOMEM;
	goto failure;
	}
	timer_setup(&drvdata->inrange_timer, uclogic_inrange_timeout, 0);
	drvdata->re_state = U8_MAX;
	hid_set_drvdata(hdev, drvdata);

	/* Initialize the device and retrieve interface parameters */
	rc = uclogic_params_init(&drvdata->params, hdev);
	if (rc != 0) {
	hid_err(hdev, "failed probing parameters: %d\n", rc);
	goto failure;
	}
	params_initialized = true;
	hid_dbg(hdev, "parameters:\n" UCLOGIC_PARAMS_FMT_STR,
	UCLOGIC_PARAMS_FMT_ARGS(&drvdata->params));
	if (drvdata->params.invalid) {
	hid_info(hdev, "interface is invalid, ignoring\n");
	rc = -ENODEV;
	goto failure;
	}

	/* Generate replacement report descriptor */
	rc = uclogic_params_get_desc(&drvdata->params,
	&drvdata->desc_ptr,
	&drvdata->desc_size);
	if (rc) {
	hid_err(hdev,
	"failed generating replacement report descriptor: %d\n",
	rc);
	goto failure;
	}

	rc = hid_parse(hdev);
	if (rc) {
	hid_err(hdev, "parse failed\n");
	goto failure;
	}

	rc = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
	if (rc) {
	hid_err(hdev, "hw start failed\n");
	goto failure;
	}

	return 0;
	failure:
	/* Assume "remove" might not be called if "probe" failed */
	if (params_initialized)
	uclogic_params_cleanup(&drvdata->params);
	return rc;
	}

	#ifdef CONFIG_PM
	static int uclogic_resume(struct hid_device *hdev)
	{
	int rc;
	struct uclogic_params params;

	/* Re-initialize the device, but discard parameters */
	rc = uclogic_params_init(&params, hdev);
	if (rc != 0)
	hid_err(hdev, "failed to re-initialize the device\n");
	else
	uclogic_params_cleanup(&params);

	return rc;
	}
	#endif

	static int uclogic_raw_event(struct hid_device *hdev,
	struct hid_report *report,
	u8 *data, int size)
	{
	struct uclogic_drvdata *drvdata = hid_get_drvdata(hdev);
	struct uclogic_params *params = &drvdata->params;

	/* Tweak pen reports, if necessary */
	if (!params->pen_unused &&
	(report->type == HID_INPUT_REPORT) &&
	(report->id == params->pen.id) &&
	(size >= 2)) {
	/* If it's the "virtual" frame controls report */
	if (params->frame.id != 0 &&
	data[1] & params->pen_frame_flag) {
	/* Change to virtual frame controls report ID */
	data[0] = params->frame.id;
	return 0;
	}
	/* If in-range reports are inverted */
	if (params->pen.inrange ==
	UCLOGIC_PARAMS_PEN_INRANGE_INVERTED) {
	/* Invert the in-range bit */
	data[1] ^= 0x40;
	}
	/*
	* If report contains fragmented high-resolution pen
	* coordinates
	*/
	if (size >= 10 && params->pen.fragmented_hires) {
	u8 pressure_low_byte;
	u8 pressure_high_byte;

	/* Lift pressure bytes */
	pressure_low_byte = data[6];
	pressure_high_byte = data[7];
	/*
	* Move Y coord to make space for high-order X
	* coord byte
	*/
	data[6] = data[5];
	data[5] = data[4];
	/* Move high-order X coord byte */
	data[4] = data[8];
	/* Move high-order Y coord byte */
	data[7] = data[9];
	/* Place pressure bytes */
	data[8] = pressure_low_byte;
	data[9] = pressure_high_byte;
	}
	/* If we need to emulate in-range detection */
	if (params->pen.inrange == UCLOGIC_PARAMS_PEN_INRANGE_NONE) {
	/* Set in-range bit */
	data[1] \|= 0x40;
	/* (Re-)start in-range timeout */
	mod_timer(&drvdata->inrange_timer,
	jiffies + msecs_to_jiffies(100));
	}
	}

	/* Tweak frame control reports, if necessary */
	if ((report->type == HID_INPUT_REPORT) &&
	(report->id == params->frame.id)) {
	/* If need to, and can, set pad device ID for Wacom drivers */
	if (params->frame.dev_id_byte > 0 &&
	params->frame.dev_id_byte < size) {
	data[params->frame.dev_id_byte] = 0xf;
	}
	/* If need to, and can, read rotary encoder state change */
	if (params->frame.re_lsb > 0 &&
	params->frame.re_lsb / 8 < size) {
	unsigned int byte = params->frame.re_lsb / 8;
	unsigned int bit = params->frame.re_lsb % 8;

	u8 change;
	u8 prev_state = drvdata->re_state;
	/* Read Gray-coded state */
	u8 state = (data[byte] >> bit) & 0x3;
	/* Encode state change into 2-bit signed integer */
	if ((prev_state == 1 && state == 0) \|\|
	(prev_state == 2 && state == 3)) {
	change = 1;
	} else if ((prev_state == 2 && state == 0) \|\|
	(prev_state == 1 && state == 3)) {
	change = 3;
	} else {
	change = 0;
	}
	/* Write change */
	data[byte] = (data[byte] & ~((u8)3 << bit)) \|
	(change << bit);
	/* Remember state */
	drvdata->re_state = state;
	}
	}

	return 0;
	}

	static void uclogic_remove(struct hid_device *hdev)
	{
	struct uclogic_drvdata *drvdata = hid_get_drvdata(hdev);

	del_timer_sync(&drvdata->inrange_timer);
	hid_hw_stop(hdev);
	kfree(drvdata->desc_ptr);
	uclogic_params_cleanup(&drvdata->params);
	}

	static const struct hid_device_id uclogic_devices[] = {
	{ HID_USB_DEVICE(USB_VENDOR_ID_UCLOGIC,
	USB_DEVICE_ID_UCLOGIC_TABLET_PF1209) },
	{ HID_USB_DEVICE(USB_VENDOR_ID_UCLOGIC,
	USB_DEVICE_ID_UCLOGIC_TABLET_WP4030U) },
	{ HID_USB_DEVICE(USB_VENDOR_ID_UCLOGIC,
	USB_DEVICE_ID_UCLOGIC_TABLET_WP5540U) },
	{ HID_USB_DEVICE(USB_VENDOR_ID_UCLOGIC,
	USB_DEVICE_ID_UCLOGIC_TABLET_WP8060U) },
	{ HID_USB_DEVICE(USB_VENDOR_ID_UCLOGIC,
	USB_DEVICE_ID_UCLOGIC_TABLET_WP1062) },
	{ HID_USB_DEVICE(USB_VENDOR_ID_UCLOGIC,
	USB_DEVICE_ID_UCLOGIC_WIRELESS_TABLET_TWHL850) },
	{ HID_USB_DEVICE(USB_VENDOR_ID_UCLOGIC,
	USB_DEVICE_ID_UCLOGIC_TABLET_TWHA60) },
	{ HID_USB_DEVICE(USB_VENDOR_ID_HUION,
	USB_DEVICE_ID_HUION_TABLET) },
	{ HID_USB_DEVICE(USB_VENDOR_ID_HUION,
	USB_DEVICE_ID_HUION_HS64) },
	{ HID_USB_DEVICE(USB_VENDOR_ID_TRUST,
	USB_DEVICE_ID_TRUST_PANORA_TABLET) },
	{ HID_USB_DEVICE(USB_VENDOR_ID_UCLOGIC,
	USB_DEVICE_ID_HUION_TABLET) },
	{ HID_USB_DEVICE(USB_VENDOR_ID_UCLOGIC,
	USB_DEVICE_ID_YIYNOVA_TABLET) },
	{ HID_USB_DEVICE(USB_VENDOR_ID_UCLOGIC,
	USB_DEVICE_ID_UCLOGIC_UGEE_TABLET_81) },
	{ HID_USB_DEVICE(USB_VENDOR_ID_UCLOGIC,
	USB_DEVICE_ID_UCLOGIC_UGEE_TABLET_45) },
	{ HID_USB_DEVICE(USB_VENDOR_ID_UCLOGIC,
	USB_DEVICE_ID_UCLOGIC_UGEE_TABLET_47) },
	{ HID_USB_DEVICE(USB_VENDOR_ID_UCLOGIC,
	USB_DEVICE_ID_UCLOGIC_DRAWIMAGE_G3) },
	{ HID_USB_DEVICE(USB_VENDOR_ID_UGTIZER,
	USB_DEVICE_ID_UGTIZER_TABLET_GP0610) },
	{ HID_USB_DEVICE(USB_VENDOR_ID_UGTIZER,
	USB_DEVICE_ID_UGTIZER_TABLET_GT5040) },
	{ HID_USB_DEVICE(USB_VENDOR_ID_UGEE,
	USB_DEVICE_ID_UGEE_TABLET_G5) },
	{ HID_USB_DEVICE(USB_VENDOR_ID_UGEE,
	USB_DEVICE_ID_UGEE_TABLET_EX07S) },
	{ HID_USB_DEVICE(USB_VENDOR_ID_UGEE,
	USB_DEVICE_ID_UGEE_TABLET_RAINBOW_CV720) },
	{ HID_USB_DEVICE(USB_VENDOR_ID_UGEE,
	USB_DEVICE_ID_UGEE_XPPEN_TABLET_G540) },
	{ HID_USB_DEVICE(USB_VENDOR_ID_UGEE,
	USB_DEVICE_ID_UGEE_XPPEN_TABLET_G640) },
	{ HID_USB_DEVICE(USB_VENDOR_ID_UGEE,
	USB_DEVICE_ID_UGEE_XPPEN_TABLET_DECO01) },
	{ }
	};
	MODULE_DEVICE_TABLE(hid, uclogic_devices);

	static struct hid_driver uclogic_driver = {
	.name = "uclogic",
	.id_table = uclogic_devices,
	.probe = uclogic_probe,
	.remove = uclogic_remove,
	.report_fixup = uclogic_report_fixup,
	.raw_event = uclogic_raw_event,
	.input_mapping = uclogic_input_mapping,
	.input_configured = uclogic_input_configured,
	#ifdef CONFIG_PM
	.resume = uclogic_resume,
	.reset_resume = uclogic_resume,
	#endif
	};
	module_hid_driver(uclogic_driver);

	MODULE_AUTHOR("Martin Rusko");
	MODULE_AUTHOR("Nikolai Kondrashov");
	MODULE_LICENSE("GPL");