wacom_sys.c 62.9 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 &&
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		    (field->application == WACOM_HID_G9_PEN ||
		     field->application == WACOM_HID_G11_PEN)) {
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			wacom->wacom_wac.mode_report = field->report->id;
			wacom->wacom_wac.mode_value = 0;
		}
		break;

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	case WACOM_HID_UP_G9:
	case WACOM_HID_UP_G11:
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		if (field->report->id == 0x03 &&
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		    (field->application == WACOM_HID_G9_TOUCHSCREEN ||
		     field->application == WACOM_HID_G11_TOUCHSCREEN)) {
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			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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	/*
	 * ISDv4 devices which predate HID's adoption of the
	 * HID_DG_BARELSWITCH2 usage use 0x000D0000 in its
	 * position instead. We can accurately detect if a
	 * usage with that value should be HID_DG_BARRELSWITCH2
	 * based on the surrounding usages, which have remained
	 * constant across generations.
	 */
	if (features->type == HID_GENERIC &&
	    usage->hid == 0x000D0000 &&
	    field->application == HID_DG_PEN &&
	    field->physical == HID_DG_STYLUS) {
		int i = usage->usage_index;

		if (i-4 >= 0 && i+1 < field->maxusage &&
		    field->usage[i-4].hid == HID_DG_TIPSWITCH &&
		    field->usage[i-3].hid == HID_DG_BARRELSWITCH &&
		    field->usage[i-2].hid == HID_DG_ERASER &&
		    field->usage[i-1].hid == HID_DG_INVERT &&
		    field->usage[i+1].hid == HID_DG_INRANGE) {
			usage->hid = HID_DG_BARRELSWITCH2;
		}
	}

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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 compare_device_paths(struct hid_device *hdev_a,
		struct hid_device *hdev_b, char separator)
{
	int n1 = strrchr(hdev_a->phys, separator) - hdev_a->phys;
	int n2 = strrchr(hdev_b->phys, separator) - hdev_b->phys;

	if (n1 != n2 || n1 <= 0 || n2 <= 0)
		return false;

	return !strncmp(hdev_a->phys, hdev_b->phys, n1);
}

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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;
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	struct wacom *sibling_wacom = hid_get_drvdata(sibling);
	struct wacom_features *sibling_features = &sibling_wacom->wacom_wac.features;
	__u32 oVid = features->oVid ? features->oVid : hdev->vendor;
	__u32 oPid = features->oPid ? features->oPid : hdev->product;
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	/* The defined oVid/oPid must match that of the sibling */
	if (features->oVid != HID_ANY_ID && sibling->vendor != oVid)
		return false;
	if (features->oPid != HID_ANY_ID && sibling->product != oPid)
		return false;

	/*
	 * Devices with the same VID/PID must share the same physical
	 * device path, while those with different VID/PID must share
	 * the same physical parent device path.
	 */
	if (hdev->vendor == sibling->vendor && hdev->product == sibling->product) {
		if (!compare_device_paths(hdev, sibling, '/'))
			return false;
	} else {
		if (!compare_device_paths(hdev, sibling, '.'))
			return false;
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	}
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	/* Skip the remaining heuristics unless you are a HID_GENERIC device */
	if (features->type != HID_GENERIC)
		return true;

	/*
	 * Direct-input devices may not be siblings of indirect-input
	 * devices.
	 */
	if ((features->device_type & WACOM_DEVICETYPE_DIRECT) &&
	    !(sibling_features->device_type & WACOM_DEVICETYPE_DIRECT))
605
		return false;
606

607 608 609 610 611 612
	/*
	 * Indirect-input devices may not be siblings of direct-input
	 * devices.
	 */
	if (!(features->device_type & WACOM_DEVICETYPE_DIRECT) &&
	    (sibling_features->device_type & WACOM_DEVICETYPE_DIRECT))
613
		return false;
614

615 616 617 618 619 620 621 622 623 624 625 626 627 628 629
	/* Pen devices may only be siblings of touch devices */
	if ((features->device_type & WACOM_DEVICETYPE_PEN) &&
	    !(sibling_features->device_type & WACOM_DEVICETYPE_TOUCH))
		return false;

	/* Touch devices may only be siblings of pen devices */
	if ((features->device_type & WACOM_DEVICETYPE_TOUCH) &&
	    !(sibling_features->device_type & WACOM_DEVICETYPE_PEN))
		return false;

	/*
	 * No reason could be found for these two devices to NOT be
	 * siblings, so there's a good chance they ARE siblings
	 */
	return true;
630 631
}

632
static struct wacom_hdev_data *wacom_get_hdev_data(struct hid_device *hdev)
633
{
634
	struct wacom_hdev_data *data;
635

636 637 638 639 640 641 642
	/* Try to find an already-probed interface from the same device */
	list_for_each_entry(data, &wacom_udev_list, list) {
		if (compare_device_paths(hdev, data->dev, '/'))
			return data;
	}

	/* Fallback to finding devices that appear to be "siblings" */
643
	list_for_each_entry(data, &wacom_udev_list, list) {
644
		if (wacom_are_sibling(hdev, data->dev)) {
645 646 647 648 649 650 651 652
			kref_get(&data->kref);
			return data;
		}
	}

	return NULL;
}

653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684
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;
	}
}

685
static int wacom_add_shared_data(struct hid_device *hdev)
686
{
687 688 689
	struct wacom *wacom = hid_get_drvdata(hdev);
	struct wacom_wac *wacom_wac = &wacom->wacom_wac;
	struct wacom_hdev_data *data;
690 691 692 693
	int retval = 0;

	mutex_lock(&wacom_udev_list_lock);

694
	data = wacom_get_hdev_data(hdev);
695
	if (!data) {
696
		data = kzalloc(sizeof(struct wacom_hdev_data), GFP_KERNEL);
697 698 699 700 701 702
		if (!data) {
			retval = -ENOMEM;
			goto out;
		}

		kref_init(&data->kref);
703
		data->dev = hdev;
704 705 706
		list_add_tail(&data->list, &wacom_udev_list);
	}

707
	wacom_wac->shared = &data->shared;
708

709 710 711 712 713 714 715
	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;
	}

716
	if (wacom_wac->features.device_type & WACOM_DEVICETYPE_TOUCH)
717
		wacom_wac->shared->touch = hdev;
718
	else if (wacom_wac->features.device_type & WACOM_DEVICETYPE_PEN)
719 720
		wacom_wac->shared->pen = hdev;

721 722 723 724 725
out:
	mutex_unlock(&wacom_udev_list_lock);
	return retval;
}

726 727 728
static int wacom_led_control(struct wacom *wacom)
{
	unsigned char *buf;
729
	int retval;
730 731
	unsigned char report_id = WAC_CMD_LED_CONTROL;
	int buf_size = 9;
732

733 734 735
	if (!hid_get_drvdata(wacom->hdev))
		return -ENODEV;

736 737 738
	if (!wacom->led.groups)
		return -ENOTSUPP;

739 740 741 742 743
	if (wacom->wacom_wac.pid) { /* wireless connected */
		report_id = WAC_CMD_WL_LED_CONTROL;
		buf_size = 13;
	}
	buf = kzalloc(buf_size, GFP_KERNEL);
744 745 746
	if (!buf)
		return -ENOMEM;

747
	if (wacom->wacom_wac.features.type >= INTUOS5S &&
748
	    wacom->wacom_wac.features.type <= INTUOSPL) {
749 750 751 752 753
		/*
		 * Touch Ring and crop mark LED luminance may take on
		 * one of four values:
		 *    0 = Low; 1 = Medium; 2 = High; 3 = Off
		 */
754
		int ring_led = wacom->led.groups[0].select & 0x03;
755 756
		int ring_lum = (((wacom->led.llv & 0x60) >> 5) - 1) & 0x03;
		int crop_lum = 0;
757 758 759 760 761 762 763 764 765 766
		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;
767 768
	}
	else {
769
		int led = wacom->led.groups[0].select | 0x4;
770 771 772

		if (wacom->wacom_wac.features.type == WACOM_21UX2 ||
		    wacom->wacom_wac.features.type == WACOM_24HD)
773
			led |= (wacom->led.groups[1].select << 4) | 0x40;
774

775
		buf[0] = report_id;
776 777 778 779 780
		buf[1] = led;
		buf[2] = wacom->led.llv;
		buf[3] = wacom->led.hlv;
		buf[4] = wacom->led.img_lum;
	}
781

782
	retval = wacom_set_report(wacom->hdev, HID_FEATURE_REPORT, buf, buf_size,
783
				  WAC_CMD_RETRIES);
784 785 786 787 788
	kfree(buf);

	return retval;
}

789 790
static int wacom_led_putimage(struct wacom *wacom, int button_id, u8 xfer_id,
		const unsigned len, const void *img)
791 792 793
{
	unsigned char *buf;
	int i, retval;
794
	const unsigned chunk_len = len / 4; /* 4 chunks are needed to be sent */
795

796
	buf = kzalloc(chunk_len + 3 , GFP_KERNEL);
797 798 799 800 801 802
	if (!buf)
		return -ENOMEM;

	/* Send 'start' command */
	buf[0] = WAC_CMD_ICON_START;
	buf[1] = 1;
803 804
	retval = wacom_set_report(wacom->hdev, HID_FEATURE_REPORT, buf, 2,
				  WAC_CMD_RETRIES);
805 806 807
	if (retval < 0)
		goto out;

808
	buf[0] = xfer_id;
809 810 811
	buf[1] = button_id & 0x07;
	for (i = 0; i < 4; i++) {
		buf[2] = i;
812
		memcpy(buf + 3, img + i * chunk_len, chunk_len);
813

814
		retval = wacom_set_report(wacom->hdev, HID_FEATURE_REPORT,
815
					  buf, chunk_len + 3, WAC_CMD_RETRIES);
816 817 818 819 820 821 822
		if (retval < 0)
			break;
	}

	/* Send 'stop' */
	buf[0] = WAC_CMD_ICON_START;
	buf[1] = 0;
823 824
	wacom_set_report(wacom->hdev, HID_FEATURE_REPORT, buf, 2,
			 WAC_CMD_RETRIES);
825 826 827 828 829 830

out:
	kfree(buf);
	return retval;
}

831
static ssize_t wacom_led_select_store(struct device *dev, int set_id,
832 833
				      const char *buf, size_t count)
{
G
Geliang Tang 已提交
834
	struct hid_device *hdev = to_hid_device(dev);
835
	struct wacom *wacom = hid_get_drvdata(hdev);
836 837 838 839 840 841 842 843 844
	unsigned int id;
	int err;

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

	mutex_lock(&wacom->lock);

845
	wacom->led.groups[set_id].select = id & 0x3;
846 847 848 849 850 851 852
	err = wacom_led_control(wacom);

	mutex_unlock(&wacom->lock);

	return err < 0 ? err : count;
}

853 854 855 856 857 858
#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);		\
}									\
859 860 861
static ssize_t wacom_led##SET_ID##_select_show(struct device *dev,	\
	struct device_attribute *attr, char *buf)			\
{									\
G
Geliang Tang 已提交
862
	struct hid_device *hdev = to_hid_device(dev);\
863
	struct wacom *wacom = hid_get_drvdata(hdev);			\
P
Ping Cheng 已提交
864
	return scnprintf(buf, PAGE_SIZE, "%d\n",			\
865
			 wacom->led.groups[SET_ID].select);		\
866
}									\
867
static DEVICE_ATTR(status_led##SET_ID##_select, DEV_ATTR_RW_PERM,	\
868
		    wacom_led##SET_ID##_select_show,			\
869 870 871 872
		    wacom_led##SET_ID##_select_store)

DEVICE_LED_SELECT_ATTR(0);
DEVICE_LED_SELECT_ATTR(1);
873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897

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
898
	struct hid_device *hdev = to_hid_device(dev);\
899
	struct wacom *wacom = hid_get_drvdata(hdev);			\
900 901 902 903
									\
	return wacom_luminance_store(wacom, &wacom->led.field,		\
				     buf, count);			\
}									\
P
Ping Cheng 已提交
904 905 906 907 908 909
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);	\
}									\
910
static DEVICE_ATTR(name##_luminance, DEV_ATTR_RW_PERM,			\
P
Ping Cheng 已提交
911 912
		   wacom_##name##_luminance_show,			\
		   wacom_##name##_luminance_store)
913 914 915 916 917 918 919 920

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
921
	struct hid_device *hdev = to_hid_device(dev);
922
	struct wacom *wacom = hid_get_drvdata(hdev);
923
	int err;
924 925 926 927 928 929 930 931 932 933
	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;
	}
934

935
	if (count != len)
936 937 938 939
		return -EINVAL;

	mutex_lock(&wacom->lock);

940
	err = wacom_led_putimage(wacom, button_id, xfer_id, len, buf);
941 942 943 944 945 946 947 948 949 950 951 952

	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);	\
}									\
953
static DEVICE_ATTR(button##BUTTON_ID##_rawimg, DEV_ATTR_WO_PERM,	\
954 955 956 957 958 959 960 961 962 963 964
		   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);

965 966 967 968 969 970 971 972 973 974 975 976
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[] = {
977 978
	&dev_attr_status0_luminance.attr,
	&dev_attr_status1_luminance.attr,
979
	&dev_attr_status_led0_select.attr,
980 981 982 983 984 985 986 987 988 989 990 991
	&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
};

992
static struct attribute_group intuos4_led_attr_group = {
993
	.name = "wacom_led",
994
	.attrs = intuos4_led_attrs,
995 996
};

997 998 999 1000 1001 1002 1003 1004 1005 1006 1007
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,
};

1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022
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);
}

1023 1024 1025
static int __wacom_devm_sysfs_create_group(struct wacom *wacom,
					   struct kobject *root,
					   struct attribute_group *group)
1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036
{
	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;
1037
	devres->root = root;
1038 1039 1040 1041 1042 1043 1044 1045 1046 1047

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

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

	return 0;
}

1048 1049 1050 1051 1052 1053 1054
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);
}

1055
enum led_brightness wacom_leds_brightness_get(struct wacom_led *led)
1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 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 1121 1122 1123 1124 1125 1126 1127
{
	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;

1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138
	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;
		}
	}

1139 1140 1141 1142 1143 1144 1145 1146 1147
	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;
1148
	if (!read_only) {
1149
		led->cdev.brightness_set_blocking = wacom_led_brightness_set;
1150 1151
		led->cdev.default_trigger = led->cdev.name;
	} else {
1152
		led->cdev.brightness_set = wacom_led_readonly_brightness_set;
1153
	}
1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166

	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;
}

1167 1168 1169 1170 1171 1172 1173
static void wacom_led_groups_release_one(void *data)
{
	struct wacom_group_leds *group = data;

	devres_release_group(group->dev, group);
}

1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202 1203
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;
	}

1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222
	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;

1223 1224 1225 1226 1227 1228 1229
	return 0;

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

1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 1273
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;
}

1274 1275 1276 1277 1278
static void wacom_led_groups_release(void *data)
{
	struct wacom *wacom = data;

	wacom->led.groups = NULL;
1279
	wacom->led.count = 0;
1280 1281 1282 1283
}

static int wacom_led_groups_allocate(struct wacom *wacom, int count)
{
1284
	struct device *dev = &wacom->hdev->dev;
1285 1286 1287
	struct wacom_group_leds *groups;
	int error;

1288
	groups = devm_kzalloc(dev, sizeof(struct wacom_group_leds) * count,
1289 1290 1291 1292
			      GFP_KERNEL);
	if (!groups)
		return -ENOMEM;

1293
	error = devm_add_action_or_reset(dev, wacom_led_groups_release, wacom);
1294 1295 1296 1297
	if (error)
		return error;

	wacom->led.groups = groups;
1298 1299 1300 1301 1302 1303 1304 1305 1306 1307 1308 1309 1310 1311 1312 1313 1314 1315 1316 1317 1318 1319 1320 1321 1322 1323 1324
	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;
	}
1325 1326 1327 1328

	return 0;
}

1329 1330 1331 1332
static int wacom_initialize_leds(struct wacom *wacom)
{
	int error;

1333 1334 1335
	if (!(wacom->wacom_wac.features.device_type & WACOM_DEVICETYPE_PAD))
		return 0;

1336 1337
	/* Initialize default values */
	switch (wacom->wacom_wac.features.type) {
1338
	case INTUOS4S:
1339
	case INTUOS4:
1340
	case INTUOS4WL:
1341
	case INTUOS4L:
1342
		wacom->led.llv = 10;
1343
		wacom->led.hlv = 20;
1344 1345
		wacom->led.max_llv = 127;
		wacom->led.max_hlv = 127;
1346
		wacom->led.img_lum = 10;
1347

1348
		error = wacom_leds_alloc_and_register(wacom, 1, 4, false);
1349 1350 1351 1352 1353 1354
		if (error) {
			hid_err(wacom->hdev,
				"cannot create leds err: %d\n", error);
			return error;
		}

1355 1356
		error = wacom_devm_sysfs_create_group(wacom,
						      &intuos4_led_attr_group);
1357 1358
		break;

1359
	case WACOM_24HD:
1360 1361 1362 1363
	case WACOM_21UX2:
		wacom->led.llv = 0;
		wacom->led.hlv = 0;
		wacom->led.img_lum = 0;
1364

1365
		error = wacom_leds_alloc_and_register(wacom, 2, 4, false);
1366 1367 1368 1369 1370 1371
		if (error) {
			hid_err(wacom->hdev,
				"cannot create leds err: %d\n", error);
			return error;
		}

1372 1373
		error = wacom_devm_sysfs_create_group(wacom,
						      &cintiq_led_attr_group);
1374 1375
		break;

1376 1377 1378
	case INTUOS5S:
	case INTUOS5:
	case INTUOS5L:
1379 1380 1381
	case INTUOSPS:
	case INTUOSPM:
	case INTUOSPL:
1382
		wacom->led.llv = 32;
1383
		wacom->led.max_llv = 96;
1384

1385
		error = wacom_leds_alloc_and_register(wacom, 1, 4, false);
1386 1387 1388 1389 1390 1391
		if (error) {
			hid_err(wacom->hdev,
				"cannot create leds err: %d\n", error);
			return error;
		}

1392 1393
		error = wacom_devm_sysfs_create_group(wacom,
						      &intuos5_led_attr_group);
1394 1395
		break;

1396
	case REMOTE:
1397 1398
		wacom->led.llv = 255;
		wacom->led.max_llv = 255;
1399 1400 1401 1402 1403 1404 1405 1406
		error = wacom_led_groups_allocate(wacom, 5);
		if (error) {
			hid_err(wacom->hdev,
				"cannot create leds err: %d\n", error);
			return error;
		}
		return 0;

1407 1408
	default:
		return 0;
1409 1410
	}

1411
	if (error) {
1412
		hid_err(wacom->hdev,
1413 1414 1415 1416 1417
			"cannot create sysfs group err: %d\n", error);
		return error;
	}
	wacom_led_control(wacom);

1418 1419 1420
	return 0;
}

1421
static enum power_supply_property wacom_battery_props[] = {
1422
	POWER_SUPPLY_PROP_MODEL_NAME,
1423
	POWER_SUPPLY_PROP_PRESENT,
1424
	POWER_SUPPLY_PROP_STATUS,
1425
	POWER_SUPPLY_PROP_SCOPE,
1426 1427 1428 1429 1430 1431 1432
	POWER_SUPPLY_PROP_CAPACITY
};

static int wacom_battery_get_property(struct power_supply *psy,
				      enum power_supply_property psp,
				      union power_supply_propval *val)
{
1433
	struct wacom_battery *battery = power_supply_get_drvdata(psy);
1434 1435 1436
	int ret = 0;

	switch (psp) {
1437 1438 1439
		case POWER_SUPPLY_PROP_MODEL_NAME:
			val->strval = battery->wacom->wacom_wac.name;
			break;
1440
		case POWER_SUPPLY_PROP_PRESENT:
1441
			val->intval = battery->bat_connected;
1442
			break;
1443 1444 1445
		case POWER_SUPPLY_PROP_SCOPE:
			val->intval = POWER_SUPPLY_SCOPE_DEVICE;
			break;
1446
		case POWER_SUPPLY_PROP_CAPACITY:
1447
			val->intval = battery->battery_capacity;
1448 1449
			break;
		case POWER_SUPPLY_PROP_STATUS:
1450
			if (battery->bat_charging)
1451
				val->intval = POWER_SUPPLY_STATUS_CHARGING;
1452 1453
			else if (battery->battery_capacity == 100 &&
				    battery->ps_connected)
1454
				val->intval = POWER_SUPPLY_STATUS_FULL;
1455
			else if (battery->ps_connected)
1456
				val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING;
1457 1458
			else
				val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
1459 1460 1461 1462 1463 1464 1465 1466 1467
			break;
		default:
			ret = -EINVAL;
			break;
	}

	return ret;
}

1468 1469
static int __wacom_initialize_battery(struct wacom *wacom,
				      struct wacom_battery *battery)
1470
{
1471
	static atomic_t battery_no = ATOMIC_INIT(0);
1472
	struct device *dev = &wacom->hdev->dev;
1473
	struct power_supply_config psy_cfg = { .drv_data = battery, };
1474
	struct power_supply *ps_bat;
1475
	struct power_supply_desc *bat_desc = &battery->bat_desc;
1476
	unsigned long n;
1477 1478 1479 1480
	int error;

	if (!devres_open_group(dev, bat_desc, GFP_KERNEL))
		return -ENOMEM;
1481

1482 1483
	battery->wacom = wacom;

1484 1485 1486 1487 1488 1489 1490
	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;
1491
	bat_desc->type = POWER_SUPPLY_TYPE_USB;
1492 1493 1494 1495 1496 1497 1498
	bat_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;
	}
1499

1500
	power_supply_powers(ps_bat, &wacom->hdev->dev);
1501

1502
	battery->battery = ps_bat;
1503

1504
	devres_close_group(dev, bat_desc);
1505
	return 0;
1506 1507 1508 1509

err:
	devres_release_group(dev, bat_desc);
	return error;
1510 1511
}

1512 1513 1514 1515 1516 1517 1518 1519
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;
}

1520 1521
static void wacom_destroy_battery(struct wacom *wacom)
{
1522 1523 1524 1525
	if (wacom->battery.battery) {
		devres_release_group(&wacom->hdev->dev,
				     &wacom->battery.bat_desc);
		wacom->battery.battery = NULL;
1526
	}
1527 1528
}

1529 1530 1531 1532
static ssize_t wacom_show_speed(struct device *dev,
				struct device_attribute
				*attr, char *buf)
{
G
Geliang Tang 已提交
1533
	struct hid_device *hdev = to_hid_device(dev);
1534 1535 1536 1537 1538 1539 1540 1541 1542
	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
1543
	struct hid_device *hdev = to_hid_device(dev);
1544 1545 1546 1547 1548 1549 1550 1551 1552 1553 1554 1555 1556 1557
	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;
}

1558
static DEVICE_ATTR(speed, DEV_ATTR_RW_PERM,
1559 1560
		wacom_show_speed, wacom_store_speed);

1561 1562 1563 1564 1565

static ssize_t wacom_show_remote_mode(struct kobject *kobj,
				      struct kobj_attribute *kattr,
				      char *buf, int index)
{
G
Geliang Tang 已提交
1566
	struct device *dev = kobj_to_dev(kobj->parent);
G
Geliang Tang 已提交
1567
	struct hid_device *hdev = to_hid_device(dev);
1568 1569 1570
	struct wacom *wacom = hid_get_drvdata(hdev);
	u8 mode;

1571
	mode = wacom->led.groups[index].select;
1572 1573 1574 1575 1576 1577 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
	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);

1604 1605
static int wacom_remote_create_attr_group(struct wacom *wacom, __u32 serial,
					  int index)
1606 1607
{
	int error = 0;
1608
	struct wacom_remote *remote = wacom->remote;
1609

1610
	remote->remotes[index].group.name = devm_kasprintf(&wacom->hdev->dev,
1611 1612
							  GFP_KERNEL,
							  "%d", serial);
1613
	if (!remote->remotes[index].group.name)
1614 1615
		return -ENOMEM;

1616
	error = __wacom_devm_sysfs_create_group(wacom, remote->remote_dir,
1617
						&remote->remotes[index].group);
1618
	if (error) {
1619
		remote->remotes[index].group.name = NULL;
1620 1621 1622 1623 1624 1625 1626 1627 1628 1629 1630 1631 1632 1633 1634 1635 1636 1637 1638 1639 1640 1641 1642 1643 1644 1645 1646 1647 1648 1649 1650 1651 1652
		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
1653
	struct device *dev = kobj_to_dev(kobj->parent);
G
Geliang Tang 已提交
1654
	struct hid_device *hdev = to_hid_device(dev);
1655 1656 1657 1658 1659 1660 1661 1662 1663 1664 1665 1666 1667 1668 1669 1670 1671 1672 1673 1674 1675 1676 1677 1678 1679 1680 1681 1682 1683
	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
};

1684 1685 1686 1687 1688 1689 1690 1691 1692 1693 1694 1695 1696 1697
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)
1698 1699
{
	int error = 0;
1700
	struct wacom_remote *remote;
1701 1702 1703 1704 1705
	int i;

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

1706 1707 1708 1709
	remote = devm_kzalloc(&wacom->hdev->dev, sizeof(*wacom->remote),
			      GFP_KERNEL);
	if (!remote)
		return -ENOMEM;
1710

1711 1712 1713 1714 1715 1716 1717 1718 1719
	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");
1720
		return -ENOMEM;
1721
	}
1722

1723 1724 1725 1726 1727
	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;
1728 1729 1730 1731 1732 1733 1734

	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);
1735 1736 1737 1738 1739 1740 1741 1742

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

	for (i = 0; i < WACOM_MAX_REMOTES; i++) {
1743
		wacom->led.groups[i].select = WACOM_STATUS_UNKNOWN;
1744
		remote->remotes[i].serial = 0;
1745 1746
	}

1747 1748 1749 1750 1751
	error = devm_add_action_or_reset(&wacom->hdev->dev,
					 wacom_remotes_destroy, wacom);
	if (error)
		return error;

1752 1753 1754
	return 0;
}

1755
static struct input_dev *wacom_allocate_input(struct wacom *wacom)
1756 1757
{
	struct input_dev *input_dev;
1758
	struct hid_device *hdev = wacom->hdev;
1759 1760
	struct wacom_wac *wacom_wac = &(wacom->wacom_wac);

1761
	input_dev = devm_input_allocate_device(&hdev->dev);
1762 1763
	if (!input_dev)
		return NULL;
1764

1765
	input_dev->name = wacom_wac->features.name;
1766 1767
	input_dev->phys = hdev->phys;
	input_dev->dev.parent = &hdev->dev;
1768 1769
	input_dev->open = wacom_open;
	input_dev->close = wacom_close;
1770 1771 1772
	input_dev->uniq = hdev->uniq;
	input_dev->id.bustype = hdev->bus;
	input_dev->id.vendor  = hdev->vendor;
1773
	input_dev->id.product = wacom_wac->pid ? wacom_wac->pid : hdev->product;
1774
	input_dev->id.version = hdev->version;
1775 1776
	input_set_drvdata(input_dev, wacom);

1777 1778 1779
	return input_dev;
}

1780 1781 1782 1783 1784 1785 1786
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);
1787 1788 1789
	if (!wacom_wac->pen_input ||
	    !wacom_wac->touch_input ||
	    !wacom_wac->pad_input)
1790 1791
		return -ENOMEM;

1792
	wacom_wac->pen_input->name = wacom_wac->pen_name;
1793 1794 1795 1796 1797 1798
	wacom_wac->touch_input->name = wacom_wac->touch_name;
	wacom_wac->pad_input->name = wacom_wac->pad_name;

	return 0;
}

1799 1800
static int wacom_register_inputs(struct wacom *wacom)
{
1801
	struct input_dev *pen_input_dev, *touch_input_dev, *pad_input_dev;
1802
	struct wacom_wac *wacom_wac = &(wacom->wacom_wac);
1803
	int error = 0;
1804

1805 1806
	pen_input_dev = wacom_wac->pen_input;
	touch_input_dev = wacom_wac->touch_input;
1807 1808
	pad_input_dev = wacom_wac->pad_input;

1809
	if (!pen_input_dev || !touch_input_dev || !pad_input_dev)
1810 1811
		return -EINVAL;

1812 1813 1814 1815 1816 1817 1818 1819 1820
	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)
1821
			goto fail;
1822 1823 1824 1825 1826 1827 1828 1829 1830 1831
	}

	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);
1832
		if (error)
1833
			goto fail;
1834
	}
1835

1836 1837 1838 1839 1840 1841 1842 1843 1844
	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)
1845
			goto fail;
1846 1847
	}

1848
	return 0;
1849

1850 1851
fail:
	wacom_wac->pad_input = NULL;
1852 1853
	wacom_wac->touch_input = NULL;
	wacom_wac->pen_input = NULL;
1854 1855 1856
	return error;
}

1857 1858 1859 1860 1861 1862 1863 1864 1865 1866 1867 1868 1869 1870 1871 1872 1873 1874 1875 1876 1877 1878 1879 1880 1881 1882 1883 1884 1885 1886 1887 1888 1889
/*
 * 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);
}

1890 1891
void wacom_battery_work(struct work_struct *work)
{
1892
	struct wacom *wacom = container_of(work, struct wacom, battery_work);
1893 1894

	if ((wacom->wacom_wac.features.quirks & WACOM_QUIRK_BATTERY) &&
1895
	     !wacom->battery.battery) {
1896 1897 1898
		wacom_initialize_battery(wacom);
	}
	else if (!(wacom->wacom_wac.features.quirks & WACOM_QUIRK_BATTERY) &&
1899
		 wacom->battery.battery) {
1900 1901 1902 1903
		wacom_destroy_battery(wacom);
	}
}

1904 1905 1906 1907 1908 1909 1910 1911 1912
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) {
1913
		size_t report_size = hid_report_len(report);
1914 1915 1916 1917 1918 1919 1920
		if (report_size > size)
			size = report_size;
	}

	return size;
}

1921
static void wacom_update_name(struct wacom *wacom, const char *suffix)
1922 1923 1924
{
	struct wacom_wac *wacom_wac = &wacom->wacom_wac;
	struct wacom_features *features = &wacom_wac->features;
1925
	char name[WACOM_NAME_MAX];
1926 1927 1928 1929 1930 1931 1932

	/* 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 */
1933
			strlcpy(name, wacom->hdev->name, sizeof(name));
1934 1935 1936

			/* strip out excess whitespaces */
			while (1) {
1937
				char *gap = strstr(name, "  ");
1938 1939 1940 1941 1942 1943
				if (gap == NULL)
					break;
				/* shift everything including the terminator */
				memmove(gap, gap+1, strlen(gap));
			}
			/* get rid of trailing whitespace */
1944 1945
			if (name[strlen(name)-1] == ' ')
				name[strlen(name)-1] = '\0';
1946 1947
		} else {
			/* no meaningful name retrieved. use product ID */
1948
			snprintf(name, sizeof(name),
1949 1950 1951
				 "%s %X", features->name, wacom->hdev->product);
		}
	} else {
1952
		strlcpy(name, features->name, sizeof(name));
1953 1954
	}

1955 1956 1957
	snprintf(wacom_wac->name, sizeof(wacom_wac->name), "%s%s",
		 name, suffix);

1958
	/* Append the device type to the name */
1959
	snprintf(wacom_wac->pen_name, sizeof(wacom_wac->pen_name),
1960
		"%s%s Pen", name, suffix);
1961
	snprintf(wacom_wac->touch_name, sizeof(wacom_wac->touch_name),
1962
		"%s%s Finger", name, suffix);
1963
	snprintf(wacom_wac->pad_name, sizeof(wacom_wac->pad_name),
1964
		"%s%s Pad", name, suffix);
1965 1966
}

1967 1968 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982
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;
}

1983
static int wacom_parse_and_register(struct wacom *wacom, bool wireless)
1984
{
1985 1986 1987
	struct wacom_wac *wacom_wac = &wacom->wacom_wac;
	struct wacom_features *features = &wacom_wac->features;
	struct hid_device *hdev = wacom->hdev;
1988
	int error;
1989
	unsigned int connect_mask = HID_CONNECT_HIDRAW;
1990

1991
	features->pktlen = wacom_compute_pktlen(hdev);
1992 1993
	if (features->pktlen > WACOM_PKGLEN_MAX)
		return -EINVAL;
1994

1995 1996 1997 1998 1999
	if (!devres_open_group(&hdev->dev, wacom, GFP_KERNEL))
		return -ENOMEM;

	wacom->resources = true;

2000 2001
	error = wacom_allocate_inputs(wacom);
	if (error)
2002
		goto fail;
2003

2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014
	/*
	 * 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;
2015
			goto fail;
2016 2017 2018
		}
	}

2019 2020 2021
	/* set the default size in case we do not get them from hid */
	wacom_set_default_phy(features);

2022
	/* Retrieve the physical and logical size for touch devices */
2023
	wacom_retrieve_hid_descriptor(hdev, features);
2024
	wacom_setup_device_quirks(wacom);
2025

2026 2027
	if (features->device_type == WACOM_DEVICETYPE_NONE &&
	    features->type != WIRELESS) {
2028 2029
		error = features->type == HID_GENERIC ? -ENODEV : 0;

2030
		dev_warn(&hdev->dev, "Unknown device_type for '%s'. %s.",
2031 2032 2033 2034
			 hdev->name,
			 error ? "Ignoring" : "Assuming pen");

		if (error)
2035
			goto fail;
2036

2037
		features->device_type |= WACOM_DEVICETYPE_PEN;
2038 2039
	}

2040 2041
	wacom_calculate_res(features);

2042
	wacom_update_name(wacom, wireless ? " (WL)" : "");
2043

2044 2045
	error = wacom_add_shared_data(hdev);
	if (error)
2046
		goto fail;
2047

2048
	if (!(features->device_type & WACOM_DEVICETYPE_WL_MONITOR) &&
2049 2050 2051
	     (features->quirks & WACOM_QUIRK_BATTERY)) {
		error = wacom_initialize_battery(wacom);
		if (error)
2052
			goto fail;
2053 2054
	}

2055 2056
	error = wacom_register_inputs(wacom);
	if (error)
2057
		goto fail;
2058

2059
	if (wacom->wacom_wac.features.device_type & WACOM_DEVICETYPE_PAD) {
2060 2061
		error = wacom_initialize_leds(wacom);
		if (error)
2062
			goto fail;
2063

2064
		error = wacom_initialize_remotes(wacom);
2065
		if (error)
2066
			goto fail;
2067 2068
	}

2069 2070 2071
	if (features->type == HID_GENERIC)
		connect_mask |= HID_CONNECT_DRIVER;

2072
	/* Regular HID work starts now */
2073
	error = hid_hw_start(hdev, connect_mask);
2074 2075
	if (error) {
		hid_err(hdev, "hw start failed\n");
2076
		goto fail;
2077
	}
2078

2079 2080 2081 2082
	if (!wireless) {
		/* Note that if query fails it is not a hard failure */
		wacom_query_tablet_data(hdev, features);
	}
2083 2084 2085 2086 2087

	/* touch only Bamboo doesn't support pen */
	if ((features->type == BAMBOO_TOUCH) &&
	    (features->device_type & WACOM_DEVICETYPE_PEN)) {
		error = -ENODEV;
2088
		goto fail_quirks;
2089 2090 2091 2092 2093 2094 2095
	}

	/* 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;
2096
		goto fail_quirks;
2097 2098
	}

2099
	if (features->device_type & WACOM_DEVICETYPE_WL_MONITOR)
2100 2101
		error = hid_hw_open(hdev);

2102
	if ((wacom_wac->features.type == INTUOSHT ||
2103
	     wacom_wac->features.type == INTUOSHT2) &&
2104
	    (wacom_wac->features.device_type & WACOM_DEVICETYPE_TOUCH)) {
2105 2106
		wacom_wac->shared->type = wacom_wac->features.type;
		wacom_wac->shared->touch_input = wacom_wac->touch_input;
2107 2108
	}

2109 2110
	devres_close_group(&hdev->dev, wacom);

2111 2112
	return 0;

2113
fail_quirks:
2114
	hid_hw_stop(hdev);
2115
fail:
2116
	wacom_release_resources(wacom);
2117 2118 2119
	return error;
}

2120 2121
static void wacom_wireless_work(struct work_struct *work)
{
2122
	struct wacom *wacom = container_of(work, struct wacom, wireless_work);
2123 2124 2125 2126 2127 2128 2129 2130 2131 2132 2133 2134 2135 2136 2137 2138 2139 2140
	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);
2141
	wacom_release_resources(wacom1);
2142 2143 2144 2145 2146

	/* Touch interface */
	hdev2 = usb_get_intfdata(usbdev->config->interface[2]);
	wacom2 = hid_get_drvdata(hdev2);
	wacom_wac2 = &(wacom2->wacom_wac);
2147
	wacom_release_resources(wacom2);
2148 2149 2150 2151 2152 2153 2154 2155 2156 2157 2158 2159 2160 2161 2162 2163 2164 2165 2166 2167 2168 2169 2170 2171

	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);
2172

2173
		wacom_wac1->pid = wacom_wac->pid;
2174 2175
		hid_hw_stop(hdev1);
		error = wacom_parse_and_register(wacom1, true);
2176 2177 2178 2179 2180 2181 2182 2183 2184 2185
		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;
2186 2187
			hid_hw_stop(hdev2);
			error = wacom_parse_and_register(wacom2, true);
2188 2189 2190 2191
			if (error)
				goto fail;
		}

2192 2193
		strlcpy(wacom_wac->name, wacom_wac1->name,
			sizeof(wacom_wac->name));
2194 2195 2196 2197 2198 2199 2200 2201
		error = wacom_initialize_battery(wacom);
		if (error)
			goto fail;
	}

	return;

fail:
2202 2203
	wacom_release_resources(wacom1);
	wacom_release_resources(wacom2);
2204 2205 2206
	return;
}

2207 2208 2209
static void wacom_remote_destroy_one(struct wacom *wacom, unsigned int index)
{
	struct wacom_remote *remote = wacom->remote;
2210
	u32 serial = remote->remotes[index].serial;
2211
	int i;
2212 2213 2214 2215 2216
	unsigned long flags;

	spin_lock_irqsave(&remote->remote_lock, flags);
	remote->remotes[index].registered = false;
	spin_unlock_irqrestore(&remote->remote_lock, flags);
2217

2218 2219 2220 2221
	if (remote->remotes[index].battery.battery)
		devres_release_group(&wacom->hdev->dev,
				     &remote->remotes[index].battery.bat_desc);

2222 2223 2224
	if (remote->remotes[index].group.name)
		devres_release_group(&wacom->hdev->dev,
				     &remote->remotes[index]);
2225 2226

	for (i = 0; i < WACOM_MAX_REMOTES; i++) {
2227 2228 2229
		if (remote->remotes[i].serial == serial) {
			remote->remotes[i].serial = 0;
			remote->remotes[i].group.name = NULL;
2230
			remote->remotes[i].registered = false;
2231
			remote->remotes[i].battery.battery = NULL;
2232 2233 2234 2235 2236 2237 2238 2239 2240
			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;
2241
	struct device *dev = &wacom->hdev->dev;
2242 2243 2244 2245 2246 2247
	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++) {
2248
		if (remote->remotes[k].serial == serial)
2249 2250 2251 2252
			break;
	}

	if (k < WACOM_MAX_REMOTES) {
2253
		remote->remotes[index].serial = serial;
2254 2255 2256
		return 0;
	}

2257
	if (!devres_open_group(dev, &remote->remotes[index], GFP_KERNEL))
2258 2259
		return -ENOMEM;

2260 2261
	error = wacom_remote_create_attr_group(wacom, serial, index);
	if (error)
2262
		goto fail;
2263

2264 2265 2266 2267 2268 2269 2270 2271 2272 2273 2274 2275 2276 2277 2278 2279 2280 2281
	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;

2282
	remote->remotes[index].serial = serial;
2283

2284 2285 2286 2287
	error = input_register_device(remote->remotes[index].input);
	if (error)
		goto fail;

2288 2289 2290 2291 2292 2293
	error = wacom_led_groups_alloc_and_register_one(
					&remote->remotes[index].input->dev,
					wacom, index, 3, true);
	if (error)
		goto fail;

2294 2295
	remote->remotes[index].registered = true;

2296
	devres_close_group(dev, &remote->remotes[index]);
2297
	return 0;
2298 2299

fail:
2300 2301
	devres_release_group(dev, &remote->remotes[index]);
	remote->remotes[index].serial = 0;
2302
	return error;
2303 2304
}

2305 2306 2307 2308 2309 2310 2311 2312 2313 2314 2315 2316 2317 2318 2319 2320 2321 2322 2323 2324 2325 2326
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;
}

2327 2328 2329
static void wacom_remote_work(struct work_struct *work)
{
	struct wacom *wacom = container_of(work, struct wacom, remote_work);
2330
	struct wacom_remote *remote = wacom->remote;
2331 2332 2333 2334
	struct wacom_remote_data data;
	unsigned long flags;
	unsigned int count;
	u32 serial;
2335
	int i;
2336

2337
	spin_lock_irqsave(&remote->remote_lock, flags);
2338

2339
	count = kfifo_out(&remote->remote_fifo, &data, sizeof(data));
2340 2341 2342 2343

	if (count != sizeof(data)) {
		hid_err(wacom->hdev,
			"workitem triggered without status available\n");
2344
		spin_unlock_irqrestore(&remote->remote_lock, flags);
2345 2346 2347
		return;
	}

2348
	if (!kfifo_is_empty(&remote->remote_fifo))
2349 2350
		wacom_schedule_work(&wacom->wacom_wac, WACOM_WORKER_REMOTE);

2351
	spin_unlock_irqrestore(&remote->remote_lock, flags);
2352 2353 2354 2355 2356

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

2357 2358
			if (remote->remotes[i].serial == serial) {
				wacom_remote_attach_battery(wacom, i);
2359
				continue;
2360
			}
2361

2362
			if (remote->remotes[i].serial)
2363
				wacom_remote_destroy_one(wacom, i);
2364

2365
			wacom_remote_create_one(wacom, serial, i);
2366

2367
		} else if (remote->remotes[i].serial) {
2368
			wacom_remote_destroy_one(wacom, i);
2369 2370 2371 2372
		}
	}
}

2373 2374 2375 2376 2377 2378 2379 2380 2381 2382 2383 2384 2385 2386 2387 2388 2389 2390
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;

2391
	wacom = devm_kzalloc(&hdev->dev, sizeof(struct wacom), GFP_KERNEL);
2392 2393 2394 2395 2396 2397 2398 2399 2400 2401 2402 2403
	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;
2404
		goto fail;
2405 2406
	}

2407
	wacom_wac->hid_data.inputmode = -1;
2408
	wacom_wac->mode_report = -1;
2409

2410 2411 2412
	wacom->usbdev = dev;
	wacom->intf = intf;
	mutex_init(&wacom->lock);
2413 2414
	INIT_WORK(&wacom->wireless_work, wacom_wireless_work);
	INIT_WORK(&wacom->battery_work, wacom_battery_work);
2415
	INIT_WORK(&wacom->remote_work, wacom_remote_work);
2416 2417 2418 2419 2420

	/* ask for the report descriptor to be loaded by HID */
	error = hid_parse(hdev);
	if (error) {
		hid_err(hdev, "parse failed\n");
2421
		goto fail;
2422 2423
	}

2424
	error = wacom_parse_and_register(wacom, false);
2425
	if (error)
2426
		goto fail;
2427 2428 2429 2430 2431 2432 2433 2434 2435 2436 2437

	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;

2438
fail:
2439
	hid_set_drvdata(hdev, NULL);
2440
	return error;
2441 2442
}

2443
static void wacom_remove(struct hid_device *hdev)
2444
{
2445
	struct wacom *wacom = hid_get_drvdata(hdev);
2446 2447 2448 2449 2450
	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);
2451

2452
	hid_hw_stop(hdev);
2453

2454 2455
	cancel_work_sync(&wacom->wireless_work);
	cancel_work_sync(&wacom->battery_work);
2456
	cancel_work_sync(&wacom->remote_work);
2457 2458
	if (hdev->bus == BUS_BLUETOOTH)
		device_remove_file(&hdev->dev, &dev_attr_speed);
2459

2460
	hid_set_drvdata(hdev, NULL);
2461 2462
}

2463
#ifdef CONFIG_PM
2464
static int wacom_resume(struct hid_device *hdev)
2465
{
2466
	struct wacom *wacom = hid_get_drvdata(hdev);
2467
	struct wacom_features *features = &wacom->wacom_wac.features;
2468 2469

	mutex_lock(&wacom->lock);
2470 2471

	/* switch to wacom mode first */
2472
	wacom_query_tablet_data(hdev, features);
2473
	wacom_led_control(wacom);
2474

2475 2476
	mutex_unlock(&wacom->lock);

2477
	return 0;
2478 2479
}

2480
static int wacom_reset_resume(struct hid_device *hdev)
2481
{
2482
	return wacom_resume(hdev);
2483
}
2484
#endif /* CONFIG_PM */
2485

2486
static struct hid_driver wacom_driver = {
2487
	.name =		"wacom",
2488
	.id_table =	wacom_ids,
2489
	.probe =	wacom_probe,
2490
	.remove =	wacom_remove,
2491
	.report =	wacom_wac_report,
2492
#ifdef CONFIG_PM
2493 2494
	.resume =	wacom_resume,
	.reset_resume =	wacom_reset_resume,
2495 2496
#endif
	.raw_event =	wacom_raw_event,
2497
};
2498
module_hid_driver(wacom_driver);
2499 2500 2501 2502 2503

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