wacom_sys.c 60.9 KB
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/*
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 * drivers/input/tablet/wacom_sys.c
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 *
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 *  USB Wacom tablet support - system specific code
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 */

/*
 * 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"
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#include "wacom.h"
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#include <linux/input/mt.h>
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#define WAC_MSG_RETRIES		5
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#define WAC_CMD_WL_LED_CONTROL	0x03
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#define WAC_CMD_LED_CONTROL	0x20
#define WAC_CMD_ICON_START	0x21
#define WAC_CMD_ICON_XFER	0x23
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#define WAC_CMD_ICON_BT_XFER	0x26
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#define WAC_CMD_RETRIES		10
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#define WAC_CMD_DELETE_PAIRING	0x20
#define WAC_CMD_UNPAIR_ALL	0xFF
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#define DEV_ATTR_RW_PERM (S_IRUGO | S_IWUSR | S_IWGRP)
#define DEV_ATTR_WO_PERM (S_IWUSR | S_IWGRP)
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#define DEV_ATTR_RO_PERM (S_IRUSR | S_IRGRP)
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static int wacom_get_report(struct hid_device *hdev, u8 type, u8 *buf,
			    size_t size, unsigned int retries)
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{
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	int retval;

	do {
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		retval = hid_hw_raw_request(hdev, buf[0], buf, size, type,
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				HID_REQ_GET_REPORT);
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	} while ((retval == -ETIMEDOUT || retval == -EAGAIN) && --retries);

	if (retval < 0)
		hid_err(hdev, "wacom_get_report: ran out of retries "
			"(last error = %d)\n", retval);
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	return retval;
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}

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

	do {
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		retval = hid_hw_raw_request(hdev, buf[0], buf, size, type,
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				HID_REQ_SET_REPORT);
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	} while ((retval == -ETIMEDOUT || retval == -EAGAIN) && --retries);

	if (retval < 0)
		hid_err(hdev, "wacom_set_report: ran out of retries "
			"(last error = %d)\n", retval);
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	return retval;
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}

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static int wacom_raw_event(struct hid_device *hdev, struct hid_report *report,
		u8 *raw_data, int size)
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{
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	struct wacom *wacom = hid_get_drvdata(hdev);
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	if (size > WACOM_PKGLEN_MAX)
		return 1;
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	memcpy(wacom->wacom_wac.data, raw_data, size);
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	wacom_wac_irq(&wacom->wacom_wac, size);

	return 0;
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}

static int wacom_open(struct input_dev *dev)
{
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	struct wacom *wacom = input_get_drvdata(dev);
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	return hid_hw_open(wacom->hdev);
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}

static void wacom_close(struct input_dev *dev)
{
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	struct wacom *wacom = input_get_drvdata(dev);
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	/*
	 * wacom->hdev should never be null, but surprisingly, I had the case
	 * once while unplugging the Wacom Wireless Receiver.
	 */
	if (wacom->hdev)
		hid_hw_close(wacom->hdev);
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}

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/*
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 * Calculate the resolution of the X or Y axis using hidinput_calc_abs_res.
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 */
static int wacom_calc_hid_res(int logical_extents, int physical_extents,
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			       unsigned unit, int exponent)
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{
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	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);
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}

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static void wacom_feature_mapping(struct hid_device *hdev,
		struct hid_field *field, struct hid_usage *usage)
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{
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	struct wacom *wacom = hid_get_drvdata(hdev);
	struct wacom_features *features = &wacom->wacom_wac.features;
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	struct hid_data *hid_data = &wacom->wacom_wac.hid_data;
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	u8 *data;
	int ret;
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	switch (usage->hid) {
	case HID_DG_CONTACTMAX:
		/* leave touch_max as is if predefined */
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		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,
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						data, 2, WAC_CMD_RETRIES);
			if (ret == 2) {
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				features->touch_max = data[1];
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			} else {
				features->touch_max = 16;
				hid_warn(hdev, "wacom_feature_mapping: "
					 "could not get HID_DG_CONTACTMAX, "
					 "defaulting to %d\n",
					  features->touch_max);
			}
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			kfree(data);
		}
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		break;
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	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\n");
			break;
		}

		hid_data->inputmode = field->report->id;
		hid_data->inputmode_index = usage->usage_index;
		break;
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	case HID_UP_DIGITIZER:
		if (field->report->id == 0x0B &&
		    (field->application == WACOM_G9_DIGITIZER ||
		     field->application == WACOM_G11_DIGITIZER)) {
			wacom->wacom_wac.mode_report = field->report->id;
			wacom->wacom_wac.mode_value = 0;
		}
		break;

	case WACOM_G9_PAGE:
	case WACOM_G11_PAGE:
		if (field->report->id == 0x03 &&
		    (field->application == WACOM_G9_TOUCHSCREEN ||
		     field->application == WACOM_G11_TOUCHSCREEN)) {
			wacom->wacom_wac.mode_report = field->report->id;
			wacom->wacom_wac.mode_value = 0;
		}
		break;
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	}
}

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/*
 * 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.
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 *
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 * Intuos5 touch interface and 3rd gen Bamboo Touch do not contain useful
 * data. We deal with them after returning from this function.
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 */
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static void wacom_usage_mapping(struct hid_device *hdev,
		struct hid_field *field, struct hid_usage *usage)
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{
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	struct wacom *wacom = hid_get_drvdata(hdev);
	struct wacom_features *features = &wacom->wacom_wac.features;
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	bool finger = WACOM_FINGER_FIELD(field);
	bool pen = WACOM_PEN_FIELD(field);
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	/*
	* Requiring Stylus Usage will ignore boot mouse
	* X/Y values and some cases of invalid Digitizer X/Y
	* values commonly reported.
	*/
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	if (pen)
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		features->device_type |= WACOM_DEVICETYPE_PEN;
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	else if (finger)
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		features->device_type |= WACOM_DEVICETYPE_TOUCH;
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	else
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		return;

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	/*
	 * Bamboo models do not support HID_DG_CONTACTMAX.
	 * And, Bamboo Pen only descriptor contains touch.
	 */
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	if (features->type > BAMBOO_PT) {
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		/* ISDv4 touch devices at least supports one touch point */
		if (finger && !features->touch_max)
			features->touch_max = 1;
	}
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	switch (usage->hid) {
	case HID_GD_X:
		features->x_max = field->logical_maximum;
		if (finger) {
			features->x_phy = field->physical_maximum;
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			if ((features->type != BAMBOO_PT) &&
			    (features->type != BAMBOO_TOUCH)) {
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				features->unit = field->unit;
				features->unitExpo = field->unit_exponent;
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			}
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		}
		break;
	case HID_GD_Y:
		features->y_max = field->logical_maximum;
		if (finger) {
			features->y_phy = field->physical_maximum;
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			if ((features->type != BAMBOO_PT) &&
			    (features->type != BAMBOO_TOUCH)) {
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				features->unit = field->unit;
				features->unitExpo = field->unit_exponent;
			}
		}
		break;
	case HID_DG_TIPPRESSURE:
		if (pen)
			features->pressure_max = field->logical_maximum;
		break;
	}
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	if (features->type == HID_GENERIC)
		wacom_wac_usage_mapping(hdev, field, usage);
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}
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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) {
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			input_mt_init_slots(wacom_wac->touch_input, wacom_wac->features.touch_max,
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				    INPUT_MT_DIRECT);
		}
	}
}

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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);
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			}
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		}
	}

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	/* 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);
	}
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	wacom_post_parse_hid(hdev, features);
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}

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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;
}

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static int wacom_set_device_mode(struct hid_device *hdev,
				 struct wacom_wac *wacom_wac)
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{
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	u8 *rep_data;
	struct hid_report *r;
	struct hid_report_enum *re;
	int length;
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	int error = -ENOMEM, limit = 0;
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	if (wacom_wac->mode_report < 0)
		return 0;

	re = &(hdev->report_enum[HID_FEATURE_REPORT]);
	r = re->report_id_hash[wacom_wac->mode_report];
	if (!r)
		return -EINVAL;

	rep_data = hid_alloc_report_buf(r, GFP_KERNEL);
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	if (!rep_data)
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		return -ENOMEM;

	length = hid_report_len(r);
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	do {
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		rep_data[0] = wacom_wac->mode_report;
		rep_data[1] = wacom_wac->mode_value;
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		error = wacom_set_report(hdev, HID_FEATURE_REPORT, rep_data,
					 length, 1);
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		if (error >= 0)
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			error = wacom_get_report(hdev, HID_FEATURE_REPORT,
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			                         rep_data, length, 1);
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	} while (error >= 0 &&
		 rep_data[1] != wacom_wac->mode_report &&
		 limit++ < WAC_MSG_RETRIES);
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	kfree(rep_data);

	return error < 0 ? error : 0;
}

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static int wacom_bt_query_tablet_data(struct hid_device *hdev, u8 speed,
		struct wacom_features *features)
{
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	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;
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		ret = wacom_set_report(hdev, HID_FEATURE_REPORT, rep_data, 2,
					3);
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		if (ret >= 0) {
			rep_data[0] = speed == 0 ? 0x05 : 0x06;
			rep_data[1] = 0x00;

			ret = wacom_set_report(hdev, HID_FEATURE_REPORT,
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						rep_data, 2, 3);
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			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\n",
			 rep_data[0], ret);
		break;
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	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;

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		ret = wacom_set_report(hdev, HID_FEATURE_REPORT, rep_data, 2,
					1);
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		if (ret >= 0)
			wacom->wacom_wac.bt_high_speed = speed;
		break;
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	}

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	return 0;
}

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/*
 * 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.
 */
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static int wacom_query_tablet_data(struct hid_device *hdev,
		struct wacom_features *features)
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{
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	struct wacom *wacom = hid_get_drvdata(hdev);
	struct wacom_wac *wacom_wac = &wacom->wacom_wac;

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

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	if (features->type != HID_GENERIC) {
		if (features->device_type & WACOM_DEVICETYPE_TOUCH) {
			if (features->type > TABLETPC) {
				/* MT Tablet PC touch */
				wacom_wac->mode_report = 3;
				wacom_wac->mode_value = 4;
			} else if (features->type == WACOM_24HDT) {
				wacom_wac->mode_report = 18;
				wacom_wac->mode_value = 2;
			} else if (features->type == WACOM_27QHDT) {
				wacom_wac->mode_report = 131;
				wacom_wac->mode_value = 2;
			} else if (features->type == BAMBOO_PAD) {
				wacom_wac->mode_report = 2;
				wacom_wac->mode_value = 2;
			}
		} else if (features->device_type & WACOM_DEVICETYPE_PEN) {
			if (features->type <= BAMBOO_PT) {
				wacom_wac->mode_report = 2;
				wacom_wac->mode_value = 2;
			}
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		}
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	}
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	wacom_set_device_mode(hdev, wacom_wac);

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

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	return 0;
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}

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static void wacom_retrieve_hid_descriptor(struct hid_device *hdev,
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					 struct wacom_features *features)
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{
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	struct wacom *wacom = hid_get_drvdata(hdev);
	struct usb_interface *intf = wacom->intf;
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	/* default features */
	features->x_fuzz = 4;
	features->y_fuzz = 4;
	features->pressure_fuzz = 0;
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	features->distance_fuzz = 1;
	features->tilt_fuzz = 1;
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	/*
	 * 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) {
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		if (intf->cur_altsetting->desc.bInterfaceNumber == 0)
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			features->device_type = WACOM_DEVICETYPE_WL_MONITOR;
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		else
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			features->device_type = WACOM_DEVICETYPE_NONE;
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		return;
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	}

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	wacom_parse_hid(hdev, features);
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}

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struct wacom_hdev_data {
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	struct list_head list;
	struct kref kref;
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	struct hid_device *dev;
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	struct wacom_shared shared;
};

static LIST_HEAD(wacom_udev_list);
static DEFINE_MUTEX(wacom_udev_list_lock);

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static bool wacom_are_sibling(struct hid_device *hdev,
		struct hid_device *sibling)
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{
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	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;
	}
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	if (vid != sibling->vendor || pid != sibling->product)
		return false;
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	/* 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;
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	return !strncmp(hdev->phys, sibling->phys, n1);
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}

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static struct wacom_hdev_data *wacom_get_hdev_data(struct hid_device *hdev)
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{
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	struct wacom_hdev_data *data;
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	list_for_each_entry(data, &wacom_udev_list, list) {
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		if (wacom_are_sibling(hdev, data->dev)) {
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			kref_get(&data->kref);
			return data;
		}
	}

	return NULL;
}

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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(void *res)
{
	struct wacom *wacom = res;
	struct wacom_hdev_data *data;
	struct wacom_wac *wacom_wac = &wacom->wacom_wac;

	if (wacom_wac->shared) {
		data = container_of(wacom_wac->shared, struct wacom_hdev_data,
				    shared);

		if (wacom_wac->shared->touch == wacom->hdev)
			wacom_wac->shared->touch = NULL;
		else if (wacom_wac->shared->pen == wacom->hdev)
			wacom_wac->shared->pen = NULL;

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

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static int wacom_add_shared_data(struct hid_device *hdev)
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{
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	struct wacom *wacom = hid_get_drvdata(hdev);
	struct wacom_wac *wacom_wac = &wacom->wacom_wac;
	struct wacom_hdev_data *data;
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	int retval = 0;

	mutex_lock(&wacom_udev_list_lock);

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	data = wacom_get_hdev_data(hdev);
612
	if (!data) {
613
		data = kzalloc(sizeof(struct wacom_hdev_data), GFP_KERNEL);
614 615 616 617 618 619
		if (!data) {
			retval = -ENOMEM;
			goto out;
		}

		kref_init(&data->kref);
620
		data->dev = hdev;
621 622 623
		list_add_tail(&data->list, &wacom_udev_list);
	}

624
	wacom_wac->shared = &data->shared;
625

626 627 628 629 630 631 632
	retval = devm_add_action(&hdev->dev, wacom_remove_shared_data, wacom);
	if (retval) {
		mutex_unlock(&wacom_udev_list_lock);
		wacom_remove_shared_data(wacom);
		return retval;
	}

633
	if (wacom_wac->features.device_type & WACOM_DEVICETYPE_TOUCH)
634
		wacom_wac->shared->touch = hdev;
635
	else if (wacom_wac->features.device_type & WACOM_DEVICETYPE_PEN)
636 637
		wacom_wac->shared->pen = hdev;

638 639 640 641 642
out:
	mutex_unlock(&wacom_udev_list_lock);
	return retval;
}

643 644 645
static int wacom_led_control(struct wacom *wacom)
{
	unsigned char *buf;
646
	int retval;
647 648
	unsigned char report_id = WAC_CMD_LED_CONTROL;
	int buf_size = 9;
649

650 651 652
	if (!hid_get_drvdata(wacom->hdev))
		return -ENODEV;

653 654 655
	if (!wacom->led.groups)
		return -ENOTSUPP;

656 657 658 659 660
	if (wacom->wacom_wac.pid) { /* wireless connected */
		report_id = WAC_CMD_WL_LED_CONTROL;
		buf_size = 13;
	}
	buf = kzalloc(buf_size, GFP_KERNEL);
661 662 663
	if (!buf)
		return -ENOMEM;

664
	if (wacom->wacom_wac.features.type >= INTUOS5S &&
665
	    wacom->wacom_wac.features.type <= INTUOSPL) {
666 667 668 669 670
		/*
		 * Touch Ring and crop mark LED luminance may take on
		 * one of four values:
		 *    0 = Low; 1 = Medium; 2 = High; 3 = Off
		 */
671
		int ring_led = wacom->led.groups[0].select & 0x03;
672 673
		int ring_lum = (((wacom->led.llv & 0x60) >> 5) - 1) & 0x03;
		int crop_lum = 0;
674 675 676 677 678 679 680 681 682 683
		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;
684 685
	}
	else {
686
		int led = wacom->led.groups[0].select | 0x4;
687 688 689

		if (wacom->wacom_wac.features.type == WACOM_21UX2 ||
		    wacom->wacom_wac.features.type == WACOM_24HD)
690
			led |= (wacom->led.groups[1].select << 4) | 0x40;
691

692
		buf[0] = report_id;
693 694 695 696 697
		buf[1] = led;
		buf[2] = wacom->led.llv;
		buf[3] = wacom->led.hlv;
		buf[4] = wacom->led.img_lum;
	}
698

699
	retval = wacom_set_report(wacom->hdev, HID_FEATURE_REPORT, buf, buf_size,
700
				  WAC_CMD_RETRIES);
701 702 703 704 705
	kfree(buf);

	return retval;
}

706 707
static int wacom_led_putimage(struct wacom *wacom, int button_id, u8 xfer_id,
		const unsigned len, const void *img)
708 709 710
{
	unsigned char *buf;
	int i, retval;
711
	const unsigned chunk_len = len / 4; /* 4 chunks are needed to be sent */
712

713
	buf = kzalloc(chunk_len + 3 , GFP_KERNEL);
714 715 716 717 718 719
	if (!buf)
		return -ENOMEM;

	/* Send 'start' command */
	buf[0] = WAC_CMD_ICON_START;
	buf[1] = 1;
720 721
	retval = wacom_set_report(wacom->hdev, HID_FEATURE_REPORT, buf, 2,
				  WAC_CMD_RETRIES);
722 723 724
	if (retval < 0)
		goto out;

725
	buf[0] = xfer_id;
726 727 728
	buf[1] = button_id & 0x07;
	for (i = 0; i < 4; i++) {
		buf[2] = i;
729
		memcpy(buf + 3, img + i * chunk_len, chunk_len);
730

731
		retval = wacom_set_report(wacom->hdev, HID_FEATURE_REPORT,
732
					  buf, chunk_len + 3, WAC_CMD_RETRIES);
733 734 735 736 737 738 739
		if (retval < 0)
			break;
	}

	/* Send 'stop' */
	buf[0] = WAC_CMD_ICON_START;
	buf[1] = 0;
740 741
	wacom_set_report(wacom->hdev, HID_FEATURE_REPORT, buf, 2,
			 WAC_CMD_RETRIES);
742 743 744 745 746 747

out:
	kfree(buf);
	return retval;
}

748
static ssize_t wacom_led_select_store(struct device *dev, int set_id,
749 750
				      const char *buf, size_t count)
{
G
Geliang Tang 已提交
751
	struct hid_device *hdev = to_hid_device(dev);
752
	struct wacom *wacom = hid_get_drvdata(hdev);
753 754 755 756 757 758 759 760 761
	unsigned int id;
	int err;

	err = kstrtouint(buf, 10, &id);
	if (err)
		return err;

	mutex_lock(&wacom->lock);

762
	wacom->led.groups[set_id].select = id & 0x3;
763 764 765 766 767 768 769
	err = wacom_led_control(wacom);

	mutex_unlock(&wacom->lock);

	return err < 0 ? err : count;
}

770 771 772 773 774 775
#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);		\
}									\
776 777 778
static ssize_t wacom_led##SET_ID##_select_show(struct device *dev,	\
	struct device_attribute *attr, char *buf)			\
{									\
G
Geliang Tang 已提交
779
	struct hid_device *hdev = to_hid_device(dev);\
780
	struct wacom *wacom = hid_get_drvdata(hdev);			\
P
Ping Cheng 已提交
781
	return scnprintf(buf, PAGE_SIZE, "%d\n",			\
782
			 wacom->led.groups[SET_ID].select);		\
783
}									\
784
static DEVICE_ATTR(status_led##SET_ID##_select, DEV_ATTR_RW_PERM,	\
785
		    wacom_led##SET_ID##_select_show,			\
786 787 788 789
		    wacom_led##SET_ID##_select_store)

DEVICE_LED_SELECT_ATTR(0);
DEVICE_LED_SELECT_ATTR(1);
790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814

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)	\
{									\
G
Geliang Tang 已提交
815
	struct hid_device *hdev = to_hid_device(dev);\
816
	struct wacom *wacom = hid_get_drvdata(hdev);			\
817 818 819 820
									\
	return wacom_luminance_store(wacom, &wacom->led.field,		\
				     buf, count);			\
}									\
P
Ping Cheng 已提交
821 822 823 824 825 826
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\n", wacom->led.field);	\
}									\
827
static DEVICE_ATTR(name##_luminance, DEV_ATTR_RW_PERM,			\
P
Ping Cheng 已提交
828 829
		   wacom_##name##_luminance_show,			\
		   wacom_##name##_luminance_store)
830 831 832 833 834 835 836 837

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)
{
G
Geliang Tang 已提交
838
	struct hid_device *hdev = to_hid_device(dev);
839
	struct wacom *wacom = hid_get_drvdata(hdev);
840
	int err;
841 842 843 844 845 846 847 848 849 850
	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;
	}
851

852
	if (count != len)
853 854 855 856
		return -EINVAL;

	mutex_lock(&wacom->lock);

857
	err = wacom_led_putimage(wacom, button_id, xfer_id, len, buf);
858 859 860 861 862 863 864 865 866 867 868 869

	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);	\
}									\
870
static DEVICE_ATTR(button##BUTTON_ID##_rawimg, DEV_ATTR_WO_PERM,	\
871 872 873 874 875 876 877 878 879 880 881
		   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);

882 883 884 885 886 887 888 889 890 891 892 893
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[] = {
894 895
	&dev_attr_status0_luminance.attr,
	&dev_attr_status1_luminance.attr,
896
	&dev_attr_status_led0_select.attr,
897 898 899 900 901 902 903 904 905 906 907 908
	&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
};

909
static struct attribute_group intuos4_led_attr_group = {
910
	.name = "wacom_led",
911
	.attrs = intuos4_led_attrs,
912 913
};

914 915 916 917 918 919 920 921 922 923 924
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,
};

925 926 927 928 929 930 931 932 933 934 935 936 937 938 939
struct wacom_sysfs_group_devres {
	struct attribute_group *group;
	struct kobject *root;
};

static void wacom_devm_sysfs_group_release(struct device *dev, void *res)
{
	struct wacom_sysfs_group_devres *devres = res;
	struct kobject *kobj = devres->root;

	dev_dbg(dev, "%s: dropping reference to %s\n",
		__func__, devres->group->name);
	sysfs_remove_group(kobj, devres->group);
}

940 941 942
static int __wacom_devm_sysfs_create_group(struct wacom *wacom,
					   struct kobject *root,
					   struct attribute_group *group)
943 944 945 946 947 948 949 950 951 952 953
{
	struct wacom_sysfs_group_devres *devres;
	int error;

	devres = devres_alloc(wacom_devm_sysfs_group_release,
			      sizeof(struct wacom_sysfs_group_devres),
			      GFP_KERNEL);
	if (!devres)
		return -ENOMEM;

	devres->group = group;
954
	devres->root = root;
955 956 957 958 959 960 961 962 963 964

	error = sysfs_create_group(devres->root, group);
	if (error)
		return error;

	devres_add(&wacom->hdev->dev, devres);

	return 0;
}

965 966 967 968 969 970 971
static int wacom_devm_sysfs_create_group(struct wacom *wacom,
					 struct attribute_group *group)
{
	return __wacom_devm_sysfs_create_group(wacom, &wacom->hdev->dev.kobj,
					       group);
}

972
enum led_brightness wacom_leds_brightness_get(struct wacom_led *led)
973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044
{
	struct wacom *wacom = led->wacom;

	if (wacom->led.max_hlv)
		return led->hlv * LED_FULL / wacom->led.max_hlv;

	if (wacom->led.max_llv)
		return led->llv * LED_FULL / wacom->led.max_llv;

	/* device doesn't support brightness tuning */
	return LED_FULL;
}

static enum led_brightness __wacom_led_brightness_get(struct led_classdev *cdev)
{
	struct wacom_led *led = container_of(cdev, struct wacom_led, cdev);
	struct wacom *wacom = led->wacom;

	if (wacom->led.groups[led->group].select != led->id)
		return LED_OFF;

	return wacom_leds_brightness_get(led);
}

static int wacom_led_brightness_set(struct led_classdev *cdev,
				    enum led_brightness brightness)
{
	struct wacom_led *led = container_of(cdev, struct wacom_led, cdev);
	struct wacom *wacom = led->wacom;
	int error;

	mutex_lock(&wacom->lock);

	if (!wacom->led.groups || (brightness == LED_OFF &&
	    wacom->led.groups[led->group].select != led->id)) {
		error = 0;
		goto out;
	}

	led->llv = wacom->led.llv = wacom->led.max_llv * brightness / LED_FULL;
	led->hlv = wacom->led.hlv = wacom->led.max_hlv * brightness / LED_FULL;

	wacom->led.groups[led->group].select = led->id;

	error = wacom_led_control(wacom);

out:
	mutex_unlock(&wacom->lock);

	return error;
}

static void wacom_led_readonly_brightness_set(struct led_classdev *cdev,
					       enum led_brightness brightness)
{
}

static int wacom_led_register_one(struct device *dev, struct wacom *wacom,
				  struct wacom_led *led, unsigned int group,
				  unsigned int id, bool read_only)
{
	int error;
	char *name;

	name = devm_kasprintf(dev, GFP_KERNEL,
			      "%s::wacom-%d.%d",
			      dev_name(dev),
			      group,
			      id);
	if (!name)
		return -ENOMEM;

1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055
	if (!read_only) {
		led->trigger.name = name;
		error = devm_led_trigger_register(dev, &led->trigger);
		if (error) {
			hid_err(wacom->hdev,
				"failed to register LED trigger %s: %d\n",
				led->cdev.name, error);
			return error;
		}
	}

1056 1057 1058 1059 1060 1061 1062 1063 1064
	led->group = group;
	led->id = id;
	led->wacom = wacom;
	led->llv = wacom->led.llv;
	led->hlv = wacom->led.hlv;
	led->cdev.name = name;
	led->cdev.max_brightness = LED_FULL;
	led->cdev.flags = LED_HW_PLUGGABLE;
	led->cdev.brightness_get = __wacom_led_brightness_get;
1065
	if (!read_only) {
1066
		led->cdev.brightness_set_blocking = wacom_led_brightness_set;
1067 1068
		led->cdev.default_trigger = led->cdev.name;
	} else {
1069
		led->cdev.brightness_set = wacom_led_readonly_brightness_set;
1070
	}
1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083

	error = devm_led_classdev_register(dev, &led->cdev);
	if (error) {
		hid_err(wacom->hdev,
			"failed to register LED %s: %d\n",
			led->cdev.name, error);
		led->cdev.name = NULL;
		return error;
	}

	return 0;
}

1084 1085 1086 1087 1088 1089 1090
static void wacom_led_groups_release_one(void *data)
{
	struct wacom_group_leds *group = data;

	devres_release_group(group->dev, group);
}

1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120
static int wacom_led_groups_alloc_and_register_one(struct device *dev,
						   struct wacom *wacom,
						   int group_id, int count,
						   bool read_only)
{
	struct wacom_led *leds;
	int i, error;

	if (group_id >= wacom->led.count || count <= 0)
		return -EINVAL;

	if (!devres_open_group(dev, &wacom->led.groups[group_id], GFP_KERNEL))
		return -ENOMEM;

	leds = devm_kzalloc(dev, sizeof(struct wacom_led) * count, GFP_KERNEL);
	if (!leds) {
		error = -ENOMEM;
		goto err;
	}

	wacom->led.groups[group_id].leds = leds;
	wacom->led.groups[group_id].count = count;

	for (i = 0; i < count; i++) {
		error = wacom_led_register_one(dev, wacom, &leds[i],
					       group_id, i, read_only);
		if (error)
			goto err;
	}

1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139
	wacom->led.groups[group_id].dev = dev;

	devres_close_group(dev, &wacom->led.groups[group_id]);

	/*
	 * There is a bug (?) in devm_led_classdev_register() in which its
	 * increments the refcount of the parent. If the parent is an input
	 * device, that means the ref count never reaches 0 when
	 * devm_input_device_release() gets called.
	 * This means that the LEDs are still there after disconnect.
	 * Manually force the release of the group so that the leds are released
	 * once we are done using them.
	 */
	error = devm_add_action_or_reset(&wacom->hdev->dev,
					 wacom_led_groups_release_one,
					 &wacom->led.groups[group_id]);
	if (error)
		return error;

1140 1141 1142 1143 1144 1145 1146
	return 0;

err:
	devres_release_group(dev, &wacom->led.groups[group_id]);
	return error;
}

1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 1188 1189 1190
struct wacom_led *wacom_led_find(struct wacom *wacom, unsigned int group_id,
				 unsigned int id)
{
	struct wacom_group_leds *group;

	if (group_id >= wacom->led.count)
		return NULL;

	group = &wacom->led.groups[group_id];

	if (!group->leds)
		return NULL;

	id %= group->count;

	return &group->leds[id];
}

/**
 * wacom_led_next: gives the next available led with a wacom trigger.
 *
 * returns the next available struct wacom_led which has its default trigger
 * or the current one if none is available.
 */
struct wacom_led *wacom_led_next(struct wacom *wacom, struct wacom_led *cur)
{
	struct wacom_led *next_led;
	int group, next;

	if (!wacom || !cur)
		return NULL;

	group = cur->group;
	next = cur->id;

	do {
		next_led = wacom_led_find(wacom, group, ++next);
		if (!next_led || next_led == cur)
			return next_led;
	} while (next_led->cdev.trigger != &next_led->trigger);

	return next_led;
}

1191 1192 1193 1194 1195
static void wacom_led_groups_release(void *data)
{
	struct wacom *wacom = data;

	wacom->led.groups = NULL;
1196
	wacom->led.count = 0;
1197 1198 1199 1200
}

static int wacom_led_groups_allocate(struct wacom *wacom, int count)
{
1201
	struct device *dev = &wacom->hdev->dev;
1202 1203 1204
	struct wacom_group_leds *groups;
	int error;

1205
	groups = devm_kzalloc(dev, sizeof(struct wacom_group_leds) * count,
1206 1207 1208 1209
			      GFP_KERNEL);
	if (!groups)
		return -ENOMEM;

1210
	error = devm_add_action_or_reset(dev, wacom_led_groups_release, wacom);
1211 1212 1213 1214
	if (error)
		return error;

	wacom->led.groups = groups;
1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 1241
	wacom->led.count = count;

	return 0;
}

static int wacom_leds_alloc_and_register(struct wacom *wacom, int group_count,
					 int led_per_group, bool read_only)
{
	struct device *dev;
	int i, error;

	if (!wacom->wacom_wac.pad_input)
		return -EINVAL;

	dev = &wacom->wacom_wac.pad_input->dev;

	error = wacom_led_groups_allocate(wacom, group_count);
	if (error)
		return error;

	for (i = 0; i < group_count; i++) {
		error = wacom_led_groups_alloc_and_register_one(dev, wacom, i,
								led_per_group,
								read_only);
		if (error)
			return error;
	}
1242 1243 1244 1245

	return 0;
}

1246 1247 1248 1249
static int wacom_initialize_leds(struct wacom *wacom)
{
	int error;

1250 1251 1252
	if (!(wacom->wacom_wac.features.device_type & WACOM_DEVICETYPE_PAD))
		return 0;

1253 1254
	/* Initialize default values */
	switch (wacom->wacom_wac.features.type) {
1255
	case INTUOS4S:
1256
	case INTUOS4:
1257
	case INTUOS4WL:
1258
	case INTUOS4L:
1259
		wacom->led.llv = 10;
1260
		wacom->led.hlv = 20;
1261 1262
		wacom->led.max_llv = 127;
		wacom->led.max_hlv = 127;
1263
		wacom->led.img_lum = 10;
1264

1265
		error = wacom_leds_alloc_and_register(wacom, 1, 4, false);
1266 1267 1268 1269 1270 1271
		if (error) {
			hid_err(wacom->hdev,
				"cannot create leds err: %d\n", error);
			return error;
		}

1272 1273
		error = wacom_devm_sysfs_create_group(wacom,
						      &intuos4_led_attr_group);
1274 1275
		break;

1276
	case WACOM_24HD:
1277 1278 1279 1280
	case WACOM_21UX2:
		wacom->led.llv = 0;
		wacom->led.hlv = 0;
		wacom->led.img_lum = 0;
1281

1282
		error = wacom_leds_alloc_and_register(wacom, 2, 4, false);
1283 1284 1285 1286 1287 1288
		if (error) {
			hid_err(wacom->hdev,
				"cannot create leds err: %d\n", error);
			return error;
		}

1289 1290
		error = wacom_devm_sysfs_create_group(wacom,
						      &cintiq_led_attr_group);
1291 1292
		break;

1293 1294 1295
	case INTUOS5S:
	case INTUOS5:
	case INTUOS5L:
1296 1297 1298
	case INTUOSPS:
	case INTUOSPM:
	case INTUOSPL:
1299
		wacom->led.llv = 32;
1300
		wacom->led.max_llv = 96;
1301

1302
		error = wacom_leds_alloc_and_register(wacom, 1, 4, false);
1303 1304 1305 1306 1307 1308
		if (error) {
			hid_err(wacom->hdev,
				"cannot create leds err: %d\n", error);
			return error;
		}

1309 1310
		error = wacom_devm_sysfs_create_group(wacom,
						      &intuos5_led_attr_group);
1311 1312
		break;

1313
	case REMOTE:
1314 1315
		wacom->led.llv = 255;
		wacom->led.max_llv = 255;
1316 1317 1318 1319 1320 1321 1322 1323
		error = wacom_led_groups_allocate(wacom, 5);
		if (error) {
			hid_err(wacom->hdev,
				"cannot create leds err: %d\n", error);
			return error;
		}
		return 0;

1324 1325
	default:
		return 0;
1326 1327
	}

1328
	if (error) {
1329
		hid_err(wacom->hdev,
1330 1331 1332 1333 1334
			"cannot create sysfs group err: %d\n", error);
		return error;
	}
	wacom_led_control(wacom);

1335 1336 1337
	return 0;
}

1338
static enum power_supply_property wacom_battery_props[] = {
1339
	POWER_SUPPLY_PROP_PRESENT,
1340
	POWER_SUPPLY_PROP_STATUS,
1341
	POWER_SUPPLY_PROP_SCOPE,
1342 1343 1344
	POWER_SUPPLY_PROP_CAPACITY
};

1345 1346 1347 1348 1349 1350
static enum power_supply_property wacom_ac_props[] = {
	POWER_SUPPLY_PROP_PRESENT,
	POWER_SUPPLY_PROP_ONLINE,
	POWER_SUPPLY_PROP_SCOPE,
};

1351 1352 1353 1354
static int wacom_battery_get_property(struct power_supply *psy,
				      enum power_supply_property psp,
				      union power_supply_propval *val)
{
1355
	struct wacom_battery *battery = power_supply_get_drvdata(psy);
1356 1357 1358
	int ret = 0;

	switch (psp) {
1359
		case POWER_SUPPLY_PROP_PRESENT:
1360
			val->intval = battery->bat_connected;
1361
			break;
1362 1363 1364
		case POWER_SUPPLY_PROP_SCOPE:
			val->intval = POWER_SUPPLY_SCOPE_DEVICE;
			break;
1365
		case POWER_SUPPLY_PROP_CAPACITY:
1366
			val->intval = battery->battery_capacity;
1367 1368
			break;
		case POWER_SUPPLY_PROP_STATUS:
1369
			if (battery->bat_charging)
1370
				val->intval = POWER_SUPPLY_STATUS_CHARGING;
1371 1372
			else if (battery->battery_capacity == 100 &&
				    battery->ps_connected)
1373
				val->intval = POWER_SUPPLY_STATUS_FULL;
1374
			else if (battery->ps_connected)
1375
				val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING;
1376 1377
			else
				val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
1378 1379 1380 1381 1382 1383 1384 1385 1386
			break;
		default:
			ret = -EINVAL;
			break;
	}

	return ret;
}

1387 1388 1389 1390
static int wacom_ac_get_property(struct power_supply *psy,
				enum power_supply_property psp,
				union power_supply_propval *val)
{
1391
	struct wacom_battery *battery = power_supply_get_drvdata(psy);
1392 1393 1394 1395 1396 1397
	int ret = 0;

	switch (psp) {
	case POWER_SUPPLY_PROP_PRESENT:
		/* fall through */
	case POWER_SUPPLY_PROP_ONLINE:
1398
		val->intval = battery->ps_connected;
1399 1400 1401 1402 1403 1404 1405 1406 1407 1408 1409
		break;
	case POWER_SUPPLY_PROP_SCOPE:
		val->intval = POWER_SUPPLY_SCOPE_DEVICE;
		break;
	default:
		ret = -EINVAL;
		break;
	}
	return ret;
}

1410 1411
static int __wacom_initialize_battery(struct wacom *wacom,
				      struct wacom_battery *battery)
1412
{
1413
	static atomic_t battery_no = ATOMIC_INIT(0);
1414
	struct device *dev = &wacom->hdev->dev;
1415 1416 1417 1418
	struct power_supply_config psy_cfg = { .drv_data = battery, };
	struct power_supply *ps_bat, *ps_ac;
	struct power_supply_desc *bat_desc = &battery->bat_desc;
	struct power_supply_desc *ac_desc = &battery->ac_desc;
1419
	unsigned long n;
1420 1421 1422 1423
	int error;

	if (!devres_open_group(dev, bat_desc, GFP_KERNEL))
		return -ENOMEM;
1424

1425 1426 1427 1428 1429 1430 1431 1432 1433 1434 1435 1436 1437 1438 1439 1440 1441 1442 1443 1444 1445 1446 1447
	n = atomic_inc_return(&battery_no) - 1;

	bat_desc->properties = wacom_battery_props;
	bat_desc->num_properties = ARRAY_SIZE(wacom_battery_props);
	bat_desc->get_property = wacom_battery_get_property;
	sprintf(battery->bat_name, "wacom_battery_%ld", n);
	bat_desc->name = battery->bat_name;
	bat_desc->type = POWER_SUPPLY_TYPE_BATTERY;
	bat_desc->use_for_apm = 0;

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

	ps_bat = devm_power_supply_register(dev, bat_desc, &psy_cfg);
	if (IS_ERR(ps_bat)) {
		error = PTR_ERR(ps_bat);
		goto err;
	}
1448

1449 1450 1451 1452 1453
	ps_ac = devm_power_supply_register(dev, ac_desc, &psy_cfg);
	if (IS_ERR(ps_ac)) {
		error = PTR_ERR(ps_ac);
		goto err;
	}
1454

1455 1456
	power_supply_powers(ps_bat, &wacom->hdev->dev);
	power_supply_powers(ps_ac, &wacom->hdev->dev);
1457

1458 1459
	battery->battery = ps_bat;
	battery->ac = ps_ac;
1460

1461
	devres_close_group(dev, bat_desc);
1462
	return 0;
1463 1464 1465 1466

err:
	devres_release_group(dev, bat_desc);
	return error;
1467 1468
}

1469 1470 1471 1472 1473 1474 1475 1476
static int wacom_initialize_battery(struct wacom *wacom)
{
	if (wacom->wacom_wac.features.quirks & WACOM_QUIRK_BATTERY)
		return __wacom_initialize_battery(wacom, &wacom->battery);

	return 0;
}

1477 1478
static void wacom_destroy_battery(struct wacom *wacom)
{
1479 1480 1481 1482 1483
	if (wacom->battery.battery) {
		devres_release_group(&wacom->hdev->dev,
				     &wacom->battery.bat_desc);
		wacom->battery.battery = NULL;
		wacom->battery.ac = NULL;
1484
	}
1485 1486
}

1487 1488 1489 1490
static ssize_t wacom_show_speed(struct device *dev,
				struct device_attribute
				*attr, char *buf)
{
G
Geliang Tang 已提交
1491
	struct hid_device *hdev = to_hid_device(dev);
1492 1493 1494 1495 1496 1497 1498 1499 1500
	struct wacom *wacom = hid_get_drvdata(hdev);

	return snprintf(buf, PAGE_SIZE, "%i\n", 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)
{
G
Geliang Tang 已提交
1501
	struct hid_device *hdev = to_hid_device(dev);
1502 1503 1504 1505 1506 1507 1508 1509 1510 1511 1512 1513 1514 1515
	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;
}

1516
static DEVICE_ATTR(speed, DEV_ATTR_RW_PERM,
1517 1518
		wacom_show_speed, wacom_store_speed);

1519 1520 1521 1522 1523

static ssize_t wacom_show_remote_mode(struct kobject *kobj,
				      struct kobj_attribute *kattr,
				      char *buf, int index)
{
G
Geliang Tang 已提交
1524
	struct device *dev = kobj_to_dev(kobj->parent);
G
Geliang Tang 已提交
1525
	struct hid_device *hdev = to_hid_device(dev);
1526 1527 1528
	struct wacom *wacom = hid_get_drvdata(hdev);
	u8 mode;

1529
	mode = wacom->led.groups[index].select;
1530 1531 1532 1533 1534 1535 1536 1537 1538 1539 1540 1541 1542 1543 1544 1545 1546 1547 1548 1549 1550 1551 1552 1553 1554 1555 1556 1557 1558 1559 1560 1561
	if (mode >= 0 && mode < 3)
		return snprintf(buf, PAGE_SIZE, "%d\n", mode);
	else
		return snprintf(buf, PAGE_SIZE, "%d\n", -1);
}

#define DEVICE_EKR_ATTR_GROUP(SET_ID)					\
static ssize_t wacom_show_remote##SET_ID##_mode(struct kobject *kobj,	\
			       struct kobj_attribute *kattr, char *buf)	\
{									\
	return wacom_show_remote_mode(kobj, kattr, buf, SET_ID);	\
}									\
static struct kobj_attribute remote##SET_ID##_mode_attr = {		\
	.attr = {.name = "remote_mode",					\
		.mode = DEV_ATTR_RO_PERM},				\
	.show = wacom_show_remote##SET_ID##_mode,			\
};									\
static struct attribute *remote##SET_ID##_serial_attrs[] = {		\
	&remote##SET_ID##_mode_attr.attr,				\
	NULL								\
};									\
static struct attribute_group remote##SET_ID##_serial_group = {		\
	.name = NULL,							\
	.attrs = remote##SET_ID##_serial_attrs,				\
}

DEVICE_EKR_ATTR_GROUP(0);
DEVICE_EKR_ATTR_GROUP(1);
DEVICE_EKR_ATTR_GROUP(2);
DEVICE_EKR_ATTR_GROUP(3);
DEVICE_EKR_ATTR_GROUP(4);

1562 1563
static int wacom_remote_create_attr_group(struct wacom *wacom, __u32 serial,
					  int index)
1564 1565
{
	int error = 0;
1566
	struct wacom_remote *remote = wacom->remote;
1567

1568
	remote->remotes[index].group.name = devm_kasprintf(&wacom->hdev->dev,
1569 1570
							  GFP_KERNEL,
							  "%d", serial);
1571
	if (!remote->remotes[index].group.name)
1572 1573
		return -ENOMEM;

1574
	error = __wacom_devm_sysfs_create_group(wacom, remote->remote_dir,
1575
						&remote->remotes[index].group);
1576
	if (error) {
1577
		remote->remotes[index].group.name = NULL;
1578 1579 1580 1581 1582 1583 1584 1585 1586 1587 1588 1589 1590 1591 1592 1593 1594 1595 1596 1597 1598 1599 1600 1601 1602 1603 1604 1605 1606 1607 1608 1609 1610
		hid_err(wacom->hdev,
			"cannot create sysfs group err: %d\n", error);
		return error;
	}

	return 0;
}

static int wacom_cmd_unpair_remote(struct wacom *wacom, unsigned char selector)
{
	const size_t buf_size = 2;
	unsigned char *buf;
	int retval;

	buf = kzalloc(buf_size, GFP_KERNEL);
	if (!buf)
		return -ENOMEM;

	buf[0] = WAC_CMD_DELETE_PAIRING;
	buf[1] = selector;

	retval = wacom_set_report(wacom->hdev, HID_OUTPUT_REPORT, buf,
				  buf_size, WAC_CMD_RETRIES);
	kfree(buf);

	return retval;
}

static ssize_t wacom_store_unpair_remote(struct kobject *kobj,
					 struct kobj_attribute *attr,
					 const char *buf, size_t count)
{
	unsigned char selector = 0;
G
Geliang Tang 已提交
1611
	struct device *dev = kobj_to_dev(kobj->parent);
G
Geliang Tang 已提交
1612
	struct hid_device *hdev = to_hid_device(dev);
1613 1614 1615 1616 1617 1618 1619 1620 1621 1622 1623 1624 1625 1626 1627 1628 1629 1630 1631 1632 1633 1634 1635 1636 1637 1638 1639 1640 1641
	struct wacom *wacom = hid_get_drvdata(hdev);
	int err;

	if (!strncmp(buf, "*\n", 2)) {
		selector = WAC_CMD_UNPAIR_ALL;
	} else {
		hid_info(wacom->hdev, "remote: unrecognized unpair code: %s\n",
			 buf);
		return -1;
	}

	mutex_lock(&wacom->lock);

	err = wacom_cmd_unpair_remote(wacom, selector);
	mutex_unlock(&wacom->lock);

	return err < 0 ? err : count;
}

static struct kobj_attribute unpair_remote_attr = {
	.attr = {.name = "unpair_remote", .mode = 0200},
	.store = wacom_store_unpair_remote,
};

static const struct attribute *remote_unpair_attrs[] = {
	&unpair_remote_attr.attr,
	NULL
};

1642 1643 1644 1645 1646 1647 1648 1649 1650 1651 1652 1653 1654 1655
static void wacom_remotes_destroy(void *data)
{
	struct wacom *wacom = data;
	struct wacom_remote *remote = wacom->remote;

	if (!remote)
		return;

	kobject_put(remote->remote_dir);
	kfifo_free(&remote->remote_fifo);
	wacom->remote = NULL;
}

static int wacom_initialize_remotes(struct wacom *wacom)
1656 1657
{
	int error = 0;
1658
	struct wacom_remote *remote;
1659 1660 1661 1662 1663
	int i;

	if (wacom->wacom_wac.features.type != REMOTE)
		return 0;

1664 1665 1666 1667
	remote = devm_kzalloc(&wacom->hdev->dev, sizeof(*wacom->remote),
			      GFP_KERNEL);
	if (!remote)
		return -ENOMEM;
1668

1669 1670 1671 1672 1673 1674 1675 1676 1677
	wacom->remote = remote;

	spin_lock_init(&remote->remote_lock);

	error = kfifo_alloc(&remote->remote_fifo,
			5 * sizeof(struct wacom_remote_data),
			GFP_KERNEL);
	if (error) {
		hid_err(wacom->hdev, "failed allocating remote_fifo\n");
1678
		return -ENOMEM;
1679
	}
1680

1681 1682 1683 1684 1685
	remote->remotes[0].group = remote0_serial_group;
	remote->remotes[1].group = remote1_serial_group;
	remote->remotes[2].group = remote2_serial_group;
	remote->remotes[3].group = remote3_serial_group;
	remote->remotes[4].group = remote4_serial_group;
1686 1687 1688 1689 1690 1691 1692

	remote->remote_dir = kobject_create_and_add("wacom_remote",
						    &wacom->hdev->dev.kobj);
	if (!remote->remote_dir)
		return -ENOMEM;

	error = sysfs_create_files(remote->remote_dir, remote_unpair_attrs);
1693 1694 1695 1696 1697 1698 1699 1700

	if (error) {
		hid_err(wacom->hdev,
			"cannot create sysfs group err: %d\n", error);
		return error;
	}

	for (i = 0; i < WACOM_MAX_REMOTES; i++) {
1701
		wacom->led.groups[i].select = WACOM_STATUS_UNKNOWN;
1702
		remote->remotes[i].serial = 0;
1703 1704
	}

1705 1706 1707 1708 1709
	error = devm_add_action_or_reset(&wacom->hdev->dev,
					 wacom_remotes_destroy, wacom);
	if (error)
		return error;

1710 1711 1712
	return 0;
}

1713
static struct input_dev *wacom_allocate_input(struct wacom *wacom)
1714 1715
{
	struct input_dev *input_dev;
1716
	struct hid_device *hdev = wacom->hdev;
1717 1718
	struct wacom_wac *wacom_wac = &(wacom->wacom_wac);

1719
	input_dev = devm_input_allocate_device(&hdev->dev);
1720 1721
	if (!input_dev)
		return NULL;
1722

1723
	input_dev->name = wacom_wac->features.name;
1724 1725
	input_dev->phys = hdev->phys;
	input_dev->dev.parent = &hdev->dev;
1726 1727
	input_dev->open = wacom_open;
	input_dev->close = wacom_close;
1728 1729 1730
	input_dev->uniq = hdev->uniq;
	input_dev->id.bustype = hdev->bus;
	input_dev->id.vendor  = hdev->vendor;
1731
	input_dev->id.product = wacom_wac->pid ? wacom_wac->pid : hdev->product;
1732
	input_dev->id.version = hdev->version;
1733 1734
	input_set_drvdata(input_dev, wacom);

1735 1736 1737
	return input_dev;
}

1738 1739 1740 1741 1742 1743 1744
static int wacom_allocate_inputs(struct wacom *wacom)
{
	struct wacom_wac *wacom_wac = &(wacom->wacom_wac);

	wacom_wac->pen_input = wacom_allocate_input(wacom);
	wacom_wac->touch_input = wacom_allocate_input(wacom);
	wacom_wac->pad_input = wacom_allocate_input(wacom);
1745 1746 1747
	if (!wacom_wac->pen_input ||
	    !wacom_wac->touch_input ||
	    !wacom_wac->pad_input)
1748 1749
		return -ENOMEM;

1750
	wacom_wac->pen_input->name = wacom_wac->pen_name;
1751 1752 1753 1754 1755 1756
	wacom_wac->touch_input->name = wacom_wac->touch_name;
	wacom_wac->pad_input->name = wacom_wac->pad_name;

	return 0;
}

1757 1758
static int wacom_register_inputs(struct wacom *wacom)
{
1759
	struct input_dev *pen_input_dev, *touch_input_dev, *pad_input_dev;
1760
	struct wacom_wac *wacom_wac = &(wacom->wacom_wac);
1761
	int error = 0;
1762

1763 1764
	pen_input_dev = wacom_wac->pen_input;
	touch_input_dev = wacom_wac->touch_input;
1765 1766
	pad_input_dev = wacom_wac->pad_input;

1767
	if (!pen_input_dev || !touch_input_dev || !pad_input_dev)
1768 1769
		return -EINVAL;

1770 1771 1772 1773 1774 1775 1776 1777 1778
	error = wacom_setup_pen_input_capabilities(pen_input_dev, wacom_wac);
	if (error) {
		/* no pen in use on this interface */
		input_free_device(pen_input_dev);
		wacom_wac->pen_input = NULL;
		pen_input_dev = NULL;
	} else {
		error = input_register_device(pen_input_dev);
		if (error)
1779
			goto fail;
1780 1781 1782 1783 1784 1785 1786 1787 1788 1789
	}

	error = wacom_setup_touch_input_capabilities(touch_input_dev, wacom_wac);
	if (error) {
		/* no touch in use on this interface */
		input_free_device(touch_input_dev);
		wacom_wac->touch_input = NULL;
		touch_input_dev = NULL;
	} else {
		error = input_register_device(touch_input_dev);
1790
		if (error)
1791
			goto fail;
1792
	}
1793

1794 1795 1796 1797 1798 1799 1800 1801 1802
	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)
1803
			goto fail;
1804 1805
	}

1806
	return 0;
1807

1808 1809
fail:
	wacom_wac->pad_input = NULL;
1810 1811
	wacom_wac->touch_input = NULL;
	wacom_wac->pen_input = NULL;
1812 1813 1814
	return error;
}

1815 1816 1817 1818 1819 1820 1821 1822 1823 1824 1825 1826 1827 1828 1829 1830 1831 1832 1833 1834 1835 1836 1837 1838 1839 1840 1841 1842 1843 1844 1845 1846 1847
/*
 * 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)
{
	/* set unit to "100th of a mm" for devices not reported by HID */
	if (!features->unit) {
		features->unit = 0x11;
		features->unitExpo = -3;
	}

	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);
}

1848 1849
void wacom_battery_work(struct work_struct *work)
{
1850
	struct wacom *wacom = container_of(work, struct wacom, battery_work);
1851 1852

	if ((wacom->wacom_wac.features.quirks & WACOM_QUIRK_BATTERY) &&
1853
	     !wacom->battery.battery) {
1854 1855 1856
		wacom_initialize_battery(wacom);
	}
	else if (!(wacom->wacom_wac.features.quirks & WACOM_QUIRK_BATTERY) &&
1857
		 wacom->battery.battery) {
1858 1859 1860 1861
		wacom_destroy_battery(wacom);
	}
}

1862 1863 1864 1865 1866 1867 1868 1869 1870
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) {
1871
		size_t report_size = hid_report_len(report);
1872 1873 1874 1875 1876 1877 1878
		if (report_size > size)
			size = report_size;
	}

	return size;
}

1879
static void wacom_update_name(struct wacom *wacom, const char *suffix)
1880 1881 1882
{
	struct wacom_wac *wacom_wac = &wacom->wacom_wac;
	struct wacom_features *features = &wacom_wac->features;
1883
	char name[WACOM_NAME_MAX];
1884 1885 1886 1887 1888 1889 1890

	/* Generic devices name unspecified */
	if ((features->type == HID_GENERIC) && !strcmp("Wacom HID", features->name)) {
		if (strstr(wacom->hdev->name, "Wacom") ||
		    strstr(wacom->hdev->name, "wacom") ||
		    strstr(wacom->hdev->name, "WACOM")) {
			/* name is in HID descriptor, use it */
1891
			strlcpy(name, wacom->hdev->name, sizeof(name));
1892 1893 1894

			/* strip out excess whitespaces */
			while (1) {
1895
				char *gap = strstr(name, "  ");
1896 1897 1898 1899 1900 1901
				if (gap == NULL)
					break;
				/* shift everything including the terminator */
				memmove(gap, gap+1, strlen(gap));
			}
			/* get rid of trailing whitespace */
1902 1903
			if (name[strlen(name)-1] == ' ')
				name[strlen(name)-1] = '\0';
1904 1905
		} else {
			/* no meaningful name retrieved. use product ID */
1906
			snprintf(name, sizeof(name),
1907 1908 1909
				 "%s %X", features->name, wacom->hdev->product);
		}
	} else {
1910
		strlcpy(name, features->name, sizeof(name));
1911 1912 1913
	}

	/* Append the device type to the name */
1914
	snprintf(wacom_wac->pen_name, sizeof(wacom_wac->pen_name),
1915
		"%s%s Pen", name, suffix);
1916
	snprintf(wacom_wac->touch_name, sizeof(wacom_wac->touch_name),
1917
		"%s%s Finger", name, suffix);
1918
	snprintf(wacom_wac->pad_name, sizeof(wacom_wac->pad_name),
1919
		"%s%s Pad", name, suffix);
1920 1921
}

1922 1923 1924 1925 1926 1927 1928 1929 1930 1931 1932 1933 1934 1935 1936 1937
static void wacom_release_resources(struct wacom *wacom)
{
	struct hid_device *hdev = wacom->hdev;

	if (!wacom->resources)
		return;

	devres_release_group(&hdev->dev, wacom);

	wacom->resources = false;

	wacom->wacom_wac.pen_input = NULL;
	wacom->wacom_wac.touch_input = NULL;
	wacom->wacom_wac.pad_input = NULL;
}

1938
static int wacom_parse_and_register(struct wacom *wacom, bool wireless)
1939
{
1940 1941 1942
	struct wacom_wac *wacom_wac = &wacom->wacom_wac;
	struct wacom_features *features = &wacom_wac->features;
	struct hid_device *hdev = wacom->hdev;
1943
	int error;
1944
	unsigned int connect_mask = HID_CONNECT_HIDRAW;
1945

1946
	features->pktlen = wacom_compute_pktlen(hdev);
1947 1948
	if (features->pktlen > WACOM_PKGLEN_MAX)
		return -EINVAL;
1949

1950 1951 1952 1953 1954
	if (!devres_open_group(&hdev->dev, wacom, GFP_KERNEL))
		return -ENOMEM;

	wacom->resources = true;

1955 1956
	error = wacom_allocate_inputs(wacom);
	if (error)
1957
		goto fail;
1958

1959 1960 1961 1962 1963 1964 1965 1966 1967 1968 1969
	/*
	 * Bamboo Pad has a generic hid handling for the Pen, and we switch it
	 * into debug mode for the touch part.
	 * We ignore the other interfaces.
	 */
	if (features->type == BAMBOO_PAD) {
		if (features->pktlen == WACOM_PKGLEN_PENABLED) {
			features->type = HID_GENERIC;
		} else if ((features->pktlen != WACOM_PKGLEN_BPAD_TOUCH) &&
			   (features->pktlen != WACOM_PKGLEN_BPAD_TOUCH_USB)) {
			error = -ENODEV;
1970
			goto fail;
1971 1972 1973
		}
	}

1974 1975 1976
	/* set the default size in case we do not get them from hid */
	wacom_set_default_phy(features);

1977
	/* Retrieve the physical and logical size for touch devices */
1978
	wacom_retrieve_hid_descriptor(hdev, features);
1979
	wacom_setup_device_quirks(wacom);
1980

1981 1982
	if (features->device_type == WACOM_DEVICETYPE_NONE &&
	    features->type != WIRELESS) {
1983 1984
		error = features->type == HID_GENERIC ? -ENODEV : 0;

1985
		dev_warn(&hdev->dev, "Unknown device_type for '%s'. %s.",
1986 1987 1988 1989
			 hdev->name,
			 error ? "Ignoring" : "Assuming pen");

		if (error)
1990
			goto fail;
1991

1992
		features->device_type |= WACOM_DEVICETYPE_PEN;
1993 1994
	}

1995 1996
	wacom_calculate_res(features);

1997
	wacom_update_name(wacom, wireless ? " (WL)" : "");
1998

1999 2000
	error = wacom_add_shared_data(hdev);
	if (error)
2001
		goto fail;
2002

2003
	if (!(features->device_type & WACOM_DEVICETYPE_WL_MONITOR) &&
2004 2005 2006
	     (features->quirks & WACOM_QUIRK_BATTERY)) {
		error = wacom_initialize_battery(wacom);
		if (error)
2007
			goto fail;
2008 2009
	}

2010 2011
	error = wacom_register_inputs(wacom);
	if (error)
2012
		goto fail;
2013

2014
	if (wacom->wacom_wac.features.device_type & WACOM_DEVICETYPE_PAD) {
2015 2016
		error = wacom_initialize_leds(wacom);
		if (error)
2017
			goto fail;
2018

2019
		error = wacom_initialize_remotes(wacom);
2020
		if (error)
2021
			goto fail;
2022 2023
	}

2024 2025 2026
	if (features->type == HID_GENERIC)
		connect_mask |= HID_CONNECT_DRIVER;

2027
	/* Regular HID work starts now */
2028
	error = hid_hw_start(hdev, connect_mask);
2029 2030
	if (error) {
		hid_err(hdev, "hw start failed\n");
2031
		goto fail;
2032
	}
2033

2034 2035 2036 2037
	if (!wireless) {
		/* Note that if query fails it is not a hard failure */
		wacom_query_tablet_data(hdev, features);
	}
2038 2039 2040 2041 2042

	/* touch only Bamboo doesn't support pen */
	if ((features->type == BAMBOO_TOUCH) &&
	    (features->device_type & WACOM_DEVICETYPE_PEN)) {
		error = -ENODEV;
2043
		goto fail_quirks;
2044 2045 2046 2047 2048 2049 2050
	}

	/* pen only Bamboo neither support touch nor pad */
	if ((features->type == BAMBOO_PEN) &&
	    ((features->device_type & WACOM_DEVICETYPE_TOUCH) ||
	    (features->device_type & WACOM_DEVICETYPE_PAD))) {
		error = -ENODEV;
2051
		goto fail_quirks;
2052 2053
	}

2054
	if (features->device_type & WACOM_DEVICETYPE_WL_MONITOR)
2055 2056
		error = hid_hw_open(hdev);

2057
	if ((wacom_wac->features.type == INTUOSHT ||
2058
	     wacom_wac->features.type == INTUOSHT2) &&
2059
	    (wacom_wac->features.device_type & WACOM_DEVICETYPE_TOUCH)) {
2060 2061
		wacom_wac->shared->type = wacom_wac->features.type;
		wacom_wac->shared->touch_input = wacom_wac->touch_input;
2062 2063
	}

2064 2065
	devres_close_group(&hdev->dev, wacom);

2066 2067
	return 0;

2068
fail_quirks:
2069
	hid_hw_stop(hdev);
2070
fail:
2071
	wacom_release_resources(wacom);
2072 2073 2074
	return error;
}

2075 2076
static void wacom_wireless_work(struct work_struct *work)
{
2077
	struct wacom *wacom = container_of(work, struct wacom, wireless_work);
2078 2079 2080 2081 2082 2083 2084 2085 2086 2087 2088 2089 2090 2091 2092 2093 2094 2095
	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);
2096
	wacom_release_resources(wacom1);
2097 2098 2099 2100 2101

	/* Touch interface */
	hdev2 = usb_get_intfdata(usbdev->config->interface[2]);
	wacom2 = hid_get_drvdata(hdev2);
	wacom_wac2 = &(wacom2->wacom_wac);
2102
	wacom_release_resources(wacom2);
2103 2104 2105 2106 2107 2108 2109 2110 2111 2112 2113 2114 2115 2116 2117 2118 2119 2120 2121 2122 2123 2124 2125 2126

	if (wacom_wac->pid == 0) {
		hid_info(wacom->hdev, "wireless tablet disconnected\n");
	} else {
		const struct hid_device_id *id = wacom_ids;

		hid_info(wacom->hdev, "wireless tablet connected with PID %x\n",
			 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.\n");
			return;
		}

		/* Stylus interface */
		wacom_wac1->features =
			*((struct wacom_features *)id->driver_data);
2127

2128
		wacom_wac1->pid = wacom_wac->pid;
2129 2130
		hid_hw_stop(hdev1);
		error = wacom_parse_and_register(wacom1, true);
2131 2132 2133 2134 2135 2136 2137 2138 2139 2140
		if (error)
			goto fail;

		/* Touch interface */
		if (wacom_wac1->features.touch_max ||
		    (wacom_wac1->features.type >= INTUOSHT &&
		    wacom_wac1->features.type <= BAMBOO_PT)) {
			wacom_wac2->features =
				*((struct wacom_features *)id->driver_data);
			wacom_wac2->pid = wacom_wac->pid;
2141 2142
			hid_hw_stop(hdev2);
			error = wacom_parse_and_register(wacom2, true);
2143 2144 2145 2146 2147 2148 2149 2150 2151 2152 2153 2154
			if (error)
				goto fail;
		}

		error = wacom_initialize_battery(wacom);
		if (error)
			goto fail;
	}

	return;

fail:
2155 2156
	wacom_release_resources(wacom1);
	wacom_release_resources(wacom2);
2157 2158 2159
	return;
}

2160 2161 2162
static void wacom_remote_destroy_one(struct wacom *wacom, unsigned int index)
{
	struct wacom_remote *remote = wacom->remote;
2163
	u32 serial = remote->remotes[index].serial;
2164
	int i;
2165 2166 2167 2168 2169
	unsigned long flags;

	spin_lock_irqsave(&remote->remote_lock, flags);
	remote->remotes[index].registered = false;
	spin_unlock_irqrestore(&remote->remote_lock, flags);
2170

2171 2172 2173 2174
	if (remote->remotes[index].battery.battery)
		devres_release_group(&wacom->hdev->dev,
				     &remote->remotes[index].battery.bat_desc);

2175 2176 2177
	if (remote->remotes[index].group.name)
		devres_release_group(&wacom->hdev->dev,
				     &remote->remotes[index]);
2178 2179

	for (i = 0; i < WACOM_MAX_REMOTES; i++) {
2180 2181 2182
		if (remote->remotes[i].serial == serial) {
			remote->remotes[i].serial = 0;
			remote->remotes[i].group.name = NULL;
2183
			remote->remotes[i].registered = false;
2184
			remote->remotes[i].battery.battery = NULL;
2185 2186 2187 2188 2189 2190 2191 2192 2193
			wacom->led.groups[i].select = WACOM_STATUS_UNKNOWN;
		}
	}
}

static int wacom_remote_create_one(struct wacom *wacom, u32 serial,
				   unsigned int index)
{
	struct wacom_remote *remote = wacom->remote;
2194
	struct device *dev = &wacom->hdev->dev;
2195 2196 2197 2198 2199 2200
	int error, k;

	/* A remote can pair more than once with an EKR,
	 * check to make sure this serial isn't already paired.
	 */
	for (k = 0; k < WACOM_MAX_REMOTES; k++) {
2201
		if (remote->remotes[k].serial == serial)
2202 2203 2204 2205
			break;
	}

	if (k < WACOM_MAX_REMOTES) {
2206
		remote->remotes[index].serial = serial;
2207 2208 2209
		return 0;
	}

2210
	if (!devres_open_group(dev, &remote->remotes[index], GFP_KERNEL))
2211 2212
		return -ENOMEM;

2213 2214
	error = wacom_remote_create_attr_group(wacom, serial, index);
	if (error)
2215
		goto fail;
2216

2217 2218 2219 2220 2221 2222 2223 2224 2225 2226 2227 2228 2229 2230 2231 2232 2233 2234
	remote->remotes[index].input = wacom_allocate_input(wacom);
	if (!remote->remotes[index].input) {
		error = -ENOMEM;
		goto fail;
	}
	remote->remotes[index].input->uniq = remote->remotes[index].group.name;
	remote->remotes[index].input->name = wacom->wacom_wac.pad_name;

	if (!remote->remotes[index].input->name) {
		error = -EINVAL;
		goto fail;
	}

	error = wacom_setup_pad_input_capabilities(remote->remotes[index].input,
						   &wacom->wacom_wac);
	if (error)
		goto fail;

2235
	remote->remotes[index].serial = serial;
2236

2237 2238 2239 2240
	error = input_register_device(remote->remotes[index].input);
	if (error)
		goto fail;

2241 2242 2243 2244 2245 2246
	error = wacom_led_groups_alloc_and_register_one(
					&remote->remotes[index].input->dev,
					wacom, index, 3, true);
	if (error)
		goto fail;

2247 2248
	remote->remotes[index].registered = true;

2249
	devres_close_group(dev, &remote->remotes[index]);
2250
	return 0;
2251 2252

fail:
2253 2254
	devres_release_group(dev, &remote->remotes[index]);
	remote->remotes[index].serial = 0;
2255
	return error;
2256 2257
}

2258 2259 2260 2261 2262 2263 2264 2265 2266 2267 2268 2269 2270 2271 2272 2273 2274 2275 2276 2277 2278 2279
static int wacom_remote_attach_battery(struct wacom *wacom, int index)
{
	struct wacom_remote *remote = wacom->remote;
	int error;

	if (!remote->remotes[index].registered)
		return 0;

	if (remote->remotes[index].battery.battery)
		return 0;

	if (wacom->led.groups[index].select == WACOM_STATUS_UNKNOWN)
		return 0;

	error = __wacom_initialize_battery(wacom,
					&wacom->remote->remotes[index].battery);
	if (error)
		return error;

	return 0;
}

2280 2281 2282
static void wacom_remote_work(struct work_struct *work)
{
	struct wacom *wacom = container_of(work, struct wacom, remote_work);
2283
	struct wacom_remote *remote = wacom->remote;
2284 2285 2286 2287
	struct wacom_remote_data data;
	unsigned long flags;
	unsigned int count;
	u32 serial;
2288
	int i;
2289

2290
	spin_lock_irqsave(&remote->remote_lock, flags);
2291

2292
	count = kfifo_out(&remote->remote_fifo, &data, sizeof(data));
2293 2294 2295 2296

	if (count != sizeof(data)) {
		hid_err(wacom->hdev,
			"workitem triggered without status available\n");
2297
		spin_unlock_irqrestore(&remote->remote_lock, flags);
2298 2299 2300
		return;
	}

2301
	if (!kfifo_is_empty(&remote->remote_fifo))
2302 2303
		wacom_schedule_work(&wacom->wacom_wac, WACOM_WORKER_REMOTE);

2304
	spin_unlock_irqrestore(&remote->remote_lock, flags);
2305 2306 2307 2308 2309

	for (i = 0; i < WACOM_MAX_REMOTES; i++) {
		serial = data.remote[i].serial;
		if (data.remote[i].connected) {

2310 2311
			if (remote->remotes[i].serial == serial) {
				wacom_remote_attach_battery(wacom, i);
2312
				continue;
2313
			}
2314

2315
			if (remote->remotes[i].serial)
2316
				wacom_remote_destroy_one(wacom, i);
2317

2318
			wacom_remote_create_one(wacom, serial, i);
2319

2320
		} else if (remote->remotes[i].serial) {
2321
			wacom_remote_destroy_one(wacom, i);
2322 2323 2324 2325
		}
	}
}

2326 2327 2328 2329 2330 2331 2332 2333 2334 2335 2336 2337 2338 2339 2340 2341 2342 2343
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;

	if (!id->driver_data)
		return -EINVAL;

	hdev->quirks |= HID_QUIRK_NO_INIT_REPORTS;

	/* hid-core sets this quirk for the boot interface */
	hdev->quirks &= ~HID_QUIRK_NOGET;

2344
	wacom = devm_kzalloc(&hdev->dev, sizeof(struct wacom), GFP_KERNEL);
2345 2346 2347 2348 2349 2350 2351 2352 2353 2354 2355 2356
	if (!wacom)
		return -ENOMEM;

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

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

	if (features->check_for_hid_type && features->hid_type != hdev->type) {
		error = -ENODEV;
2357
		goto fail;
2358 2359
	}

2360
	wacom_wac->hid_data.inputmode = -1;
2361
	wacom_wac->mode_report = -1;
2362

2363 2364 2365
	wacom->usbdev = dev;
	wacom->intf = intf;
	mutex_init(&wacom->lock);
2366 2367
	INIT_WORK(&wacom->wireless_work, wacom_wireless_work);
	INIT_WORK(&wacom->battery_work, wacom_battery_work);
2368
	INIT_WORK(&wacom->remote_work, wacom_remote_work);
2369 2370 2371 2372 2373

	/* ask for the report descriptor to be loaded by HID */
	error = hid_parse(hdev);
	if (error) {
		hid_err(hdev, "parse failed\n");
2374
		goto fail;
2375 2376
	}

2377
	error = wacom_parse_and_register(wacom, false);
2378
	if (error)
2379
		goto fail;
2380 2381 2382 2383 2384 2385 2386 2387 2388 2389 2390

	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\n",
				 error);
	}

	return 0;

2391
fail:
2392
	hid_set_drvdata(hdev, NULL);
2393
	return error;
2394 2395
}

2396
static void wacom_remove(struct hid_device *hdev)
2397
{
2398
	struct wacom *wacom = hid_get_drvdata(hdev);
2399 2400 2401 2402 2403
	struct wacom_wac *wacom_wac = &wacom->wacom_wac;
	struct wacom_features *features = &wacom_wac->features;

	if (features->device_type & WACOM_DEVICETYPE_WL_MONITOR)
		hid_hw_close(hdev);
2404

2405
	hid_hw_stop(hdev);
2406

2407 2408
	cancel_work_sync(&wacom->wireless_work);
	cancel_work_sync(&wacom->battery_work);
2409
	cancel_work_sync(&wacom->remote_work);
2410 2411
	if (hdev->bus == BUS_BLUETOOTH)
		device_remove_file(&hdev->dev, &dev_attr_speed);
2412

2413
	hid_set_drvdata(hdev, NULL);
2414 2415
}

2416
#ifdef CONFIG_PM
2417
static int wacom_resume(struct hid_device *hdev)
2418
{
2419
	struct wacom *wacom = hid_get_drvdata(hdev);
2420
	struct wacom_features *features = &wacom->wacom_wac.features;
2421 2422

	mutex_lock(&wacom->lock);
2423 2424

	/* switch to wacom mode first */
2425
	wacom_query_tablet_data(hdev, features);
2426
	wacom_led_control(wacom);
2427

2428 2429
	mutex_unlock(&wacom->lock);

2430
	return 0;
2431 2432
}

2433
static int wacom_reset_resume(struct hid_device *hdev)
2434
{
2435
	return wacom_resume(hdev);
2436
}
2437
#endif /* CONFIG_PM */
2438

2439
static struct hid_driver wacom_driver = {
2440
	.name =		"wacom",
2441
	.id_table =	wacom_ids,
2442
	.probe =	wacom_probe,
2443
	.remove =	wacom_remove,
2444
	.report =	wacom_wac_report,
2445
#ifdef CONFIG_PM
2446 2447
	.resume =	wacom_resume,
	.reset_resume =	wacom_reset_resume,
2448 2449
#endif
	.raw_event =	wacom_raw_event,
2450
};
2451
module_hid_driver(wacom_driver);
2452 2453 2454 2455 2456

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