hid-input.c 56.8 KB
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// SPDX-License-Identifier: GPL-2.0-or-later
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/*
 *  Copyright (c) 2000-2001 Vojtech Pavlik
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 *  Copyright (c) 2006-2010 Jiri Kosina
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 *
 *  HID to Linux Input mapping
 */

/*
 *
 * Should you need to contact me, the author, you can do so either by
 * e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail:
 * Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic
 */

#include <linux/module.h>
#include <linux/slab.h>
#include <linux/kernel.h>

#include <linux/hid.h>
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#include <linux/hid-debug.h>
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#include "hid-ids.h"

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#define unk	KEY_UNKNOWN

static const unsigned char hid_keyboard[256] = {
	  0,  0,  0,  0, 30, 48, 46, 32, 18, 33, 34, 35, 23, 36, 37, 38,
	 50, 49, 24, 25, 16, 19, 31, 20, 22, 47, 17, 45, 21, 44,  2,  3,
	  4,  5,  6,  7,  8,  9, 10, 11, 28,  1, 14, 15, 57, 12, 13, 26,
	 27, 43, 43, 39, 40, 41, 51, 52, 53, 58, 59, 60, 61, 62, 63, 64,
	 65, 66, 67, 68, 87, 88, 99, 70,119,110,102,104,111,107,109,106,
	105,108,103, 69, 98, 55, 74, 78, 96, 79, 80, 81, 75, 76, 77, 71,
	 72, 73, 82, 83, 86,127,116,117,183,184,185,186,187,188,189,190,
	191,192,193,194,134,138,130,132,128,129,131,137,133,135,136,113,
	115,114,unk,unk,unk,121,unk, 89, 93,124, 92, 94, 95,unk,unk,unk,
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	122,123, 90, 91, 85,unk,unk,unk,unk,unk,unk,unk,111,unk,unk,unk,
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	unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,
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	unk,unk,unk,unk,unk,unk,179,180,unk,unk,unk,unk,unk,unk,unk,unk,
40
	unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,
41
	unk,unk,unk,unk,unk,unk,unk,unk,111,unk,unk,unk,unk,unk,unk,unk,
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	 29, 42, 56,125, 97, 54,100,126,164,166,165,163,161,115,114,113,
	150,158,159,128,136,177,178,176,142,152,173,140,unk,unk,unk,unk
};

static const struct {
	__s32 x;
	__s32 y;
}  hid_hat_to_axis[] = {{ 0, 0}, { 0,-1}, { 1,-1}, { 1, 0}, { 1, 1}, { 0, 1}, {-1, 1}, {-1, 0}, {-1,-1}};

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#define map_abs(c)	hid_map_usage(hidinput, usage, &bit, &max, EV_ABS, (c))
#define map_rel(c)	hid_map_usage(hidinput, usage, &bit, &max, EV_REL, (c))
#define map_key(c)	hid_map_usage(hidinput, usage, &bit, &max, EV_KEY, (c))
#define map_led(c)	hid_map_usage(hidinput, usage, &bit, &max, EV_LED, (c))
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#define map_abs_clear(c)	hid_map_usage_clear(hidinput, usage, &bit, \
		&max, EV_ABS, (c))
#define map_key_clear(c)	hid_map_usage_clear(hidinput, usage, &bit, \
		&max, EV_KEY, (c))
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static bool match_scancode(struct hid_usage *usage,
			   unsigned int cur_idx, unsigned int scancode)
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{
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	return (usage->hid & (HID_USAGE_PAGE | HID_USAGE)) == scancode;
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}

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static bool match_keycode(struct hid_usage *usage,
			  unsigned int cur_idx, unsigned int keycode)
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{
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	/*
	 * We should exclude unmapped usages when doing lookup by keycode.
	 */
	return (usage->type == EV_KEY && usage->code == keycode);
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}
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static bool match_index(struct hid_usage *usage,
			unsigned int cur_idx, unsigned int idx)
{
	return cur_idx == idx;
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}

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typedef bool (*hid_usage_cmp_t)(struct hid_usage *usage,
				unsigned int cur_idx, unsigned int val);

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static struct hid_usage *hidinput_find_key(struct hid_device *hid,
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					   hid_usage_cmp_t match,
					   unsigned int value,
					   unsigned int *usage_idx)
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{
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	unsigned int i, j, k, cur_idx = 0;
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	struct hid_report *report;
	struct hid_usage *usage;

	for (k = HID_INPUT_REPORT; k <= HID_OUTPUT_REPORT; k++) {
		list_for_each_entry(report, &hid->report_enum[k].report_list, list) {
			for (i = 0; i < report->maxfield; i++) {
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				for (j = 0; j < report->field[i]->maxusage; j++) {
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					usage = report->field[i]->usage + j;
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					if (usage->type == EV_KEY || usage->type == 0) {
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						if (match(usage, cur_idx, value)) {
							if (usage_idx)
								*usage_idx = cur_idx;
							return usage;
						}
						cur_idx++;
					}
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				}
			}
		}
	}
	return NULL;
}

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static struct hid_usage *hidinput_locate_usage(struct hid_device *hid,
					const struct input_keymap_entry *ke,
					unsigned int *index)
{
	struct hid_usage *usage;
	unsigned int scancode;

	if (ke->flags & INPUT_KEYMAP_BY_INDEX)
		usage = hidinput_find_key(hid, match_index, ke->index, index);
	else if (input_scancode_to_scalar(ke, &scancode) == 0)
		usage = hidinput_find_key(hid, match_scancode, scancode, index);
	else
		usage = NULL;

	return usage;
}

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static int hidinput_getkeycode(struct input_dev *dev,
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			       struct input_keymap_entry *ke)
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{
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	struct hid_device *hid = input_get_drvdata(dev);
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	struct hid_usage *usage;
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	unsigned int scancode, index;
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	usage = hidinput_locate_usage(hid, ke, &index);
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	if (usage) {
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		ke->keycode = usage->type == EV_KEY ?
				usage->code : KEY_RESERVED;
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		ke->index = index;
		scancode = usage->hid & (HID_USAGE_PAGE | HID_USAGE);
		ke->len = sizeof(scancode);
		memcpy(ke->scancode, &scancode, sizeof(scancode));
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		return 0;
	}
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	return -EINVAL;
}

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static int hidinput_setkeycode(struct input_dev *dev,
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			       const struct input_keymap_entry *ke,
			       unsigned int *old_keycode)
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{
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	struct hid_device *hid = input_get_drvdata(dev);
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	struct hid_usage *usage;
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	usage = hidinput_locate_usage(hid, ke, NULL);
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	if (usage) {
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		*old_keycode = usage->type == EV_KEY ?
				usage->code : KEY_RESERVED;
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		usage->code = ke->keycode;
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		clear_bit(*old_keycode, dev->keybit);
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		set_bit(usage->code, dev->keybit);
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		dbg_hid("Assigned keycode %d to HID usage code %x\n",
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			usage->code, usage->hid);

		/*
		 * Set the keybit for the old keycode if the old keycode is used
		 * by another key
		 */
		if (hidinput_find_key(hid, match_keycode, *old_keycode, NULL))
			set_bit(*old_keycode, dev->keybit);
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		return 0;
	}
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	return -EINVAL;
}

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/**
 * hidinput_calc_abs_res - calculate an absolute axis resolution
 * @field: the HID report field to calculate resolution for
 * @code: axis code
 *
 * The formula is:
 *                         (logical_maximum - logical_minimum)
 * resolution = ----------------------------------------------------------
 *              (physical_maximum - physical_minimum) * 10 ^ unit_exponent
 *
 * as seen in the HID specification v1.11 6.2.2.7 Global Items.
 *
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 * Only exponent 1 length units are processed. Centimeters and inches are
 * converted to millimeters. Degrees are converted to radians.
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 */
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__s32 hidinput_calc_abs_res(const struct hid_field *field, __u16 code)
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{
	__s32 unit_exponent = field->unit_exponent;
	__s32 logical_extents = field->logical_maximum -
					field->logical_minimum;
	__s32 physical_extents = field->physical_maximum -
					field->physical_minimum;
	__s32 prev;

	/* Check if the extents are sane */
	if (logical_extents <= 0 || physical_extents <= 0)
		return 0;

	/*
	 * Verify and convert units.
	 * See HID specification v1.11 6.2.2.7 Global Items for unit decoding
	 */
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	switch (code) {
	case ABS_X:
	case ABS_Y:
	case ABS_Z:
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	case ABS_MT_POSITION_X:
	case ABS_MT_POSITION_Y:
	case ABS_MT_TOOL_X:
	case ABS_MT_TOOL_Y:
	case ABS_MT_TOUCH_MAJOR:
	case ABS_MT_TOUCH_MINOR:
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		if (field->unit == 0x11) {		/* If centimeters */
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			/* Convert to millimeters */
			unit_exponent += 1;
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		} else if (field->unit == 0x13) {	/* If inches */
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			/* Convert to millimeters */
			prev = physical_extents;
			physical_extents *= 254;
			if (physical_extents < prev)
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				return 0;
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			unit_exponent -= 1;
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		} else {
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			return 0;
		}
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		break;

	case ABS_RX:
	case ABS_RY:
	case ABS_RZ:
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	case ABS_WHEEL:
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	case ABS_TILT_X:
	case ABS_TILT_Y:
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		if (field->unit == 0x14) {		/* If degrees */
			/* Convert to radians */
			prev = logical_extents;
			logical_extents *= 573;
			if (logical_extents < prev)
				return 0;
			unit_exponent += 1;
		} else if (field->unit != 0x12) {	/* If not radians */
			return 0;
		}
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		break;

	default:
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		return 0;
	}

	/* Apply negative unit exponent */
	for (; unit_exponent < 0; unit_exponent++) {
		prev = logical_extents;
		logical_extents *= 10;
		if (logical_extents < prev)
			return 0;
	}
	/* Apply positive unit exponent */
	for (; unit_exponent > 0; unit_exponent--) {
		prev = physical_extents;
		physical_extents *= 10;
		if (physical_extents < prev)
			return 0;
	}

	/* Calculate resolution */
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	return DIV_ROUND_CLOSEST(logical_extents, physical_extents);
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}
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EXPORT_SYMBOL_GPL(hidinput_calc_abs_res);
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#ifdef CONFIG_HID_BATTERY_STRENGTH
static enum power_supply_property hidinput_battery_props[] = {
	POWER_SUPPLY_PROP_PRESENT,
	POWER_SUPPLY_PROP_ONLINE,
	POWER_SUPPLY_PROP_CAPACITY,
	POWER_SUPPLY_PROP_MODEL_NAME,
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	POWER_SUPPLY_PROP_STATUS,
	POWER_SUPPLY_PROP_SCOPE,
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};

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#define HID_BATTERY_QUIRK_PERCENT	(1 << 0) /* always reports percent */
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#define HID_BATTERY_QUIRK_FEATURE	(1 << 1) /* ask for feature report */
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#define HID_BATTERY_QUIRK_IGNORE	(1 << 2) /* completely ignore the battery */
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static const struct hid_device_id hid_battery_quirks[] = {
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	{ HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE,
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		USB_DEVICE_ID_APPLE_ALU_WIRELESS_2009_ISO),
	  HID_BATTERY_QUIRK_PERCENT | HID_BATTERY_QUIRK_FEATURE },
	{ HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE,
		USB_DEVICE_ID_APPLE_ALU_WIRELESS_2009_ANSI),
	  HID_BATTERY_QUIRK_PERCENT | HID_BATTERY_QUIRK_FEATURE },
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	{ HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE,
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		USB_DEVICE_ID_APPLE_ALU_WIRELESS_2011_ANSI),
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	  HID_BATTERY_QUIRK_PERCENT | HID_BATTERY_QUIRK_FEATURE },
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	{ HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE,
			       USB_DEVICE_ID_APPLE_ALU_WIRELESS_2011_ISO),
	  HID_BATTERY_QUIRK_PERCENT | HID_BATTERY_QUIRK_FEATURE },
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	{ HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE,
		USB_DEVICE_ID_APPLE_ALU_WIRELESS_ANSI),
	  HID_BATTERY_QUIRK_PERCENT | HID_BATTERY_QUIRK_FEATURE },
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	{ HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_ELECOM,
		USB_DEVICE_ID_ELECOM_BM084),
	  HID_BATTERY_QUIRK_IGNORE },
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	{ HID_USB_DEVICE(USB_VENDOR_ID_SYMBOL,
		USB_DEVICE_ID_SYMBOL_SCANNER_3),
	  HID_BATTERY_QUIRK_IGNORE },
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	{ HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_ASUSTEK,
		USB_DEVICE_ID_ASUSTEK_T100CHI_KEYBOARD),
	  HID_BATTERY_QUIRK_IGNORE },
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	{}
};

static unsigned find_battery_quirk(struct hid_device *hdev)
{
	unsigned quirks = 0;
	const struct hid_device_id *match;

	match = hid_match_id(hdev, hid_battery_quirks);
	if (match != NULL)
		quirks = match->driver_data;

	return quirks;
}

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static int hidinput_scale_battery_capacity(struct hid_device *dev,
					   int value)
{
	if (dev->battery_min < dev->battery_max &&
	    value >= dev->battery_min && value <= dev->battery_max)
		value = ((value - dev->battery_min) * 100) /
			(dev->battery_max - dev->battery_min);

	return value;
}

static int hidinput_query_battery_capacity(struct hid_device *dev)
{
	u8 *buf;
	int ret;

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	buf = kmalloc(4, GFP_KERNEL);
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	if (!buf)
		return -ENOMEM;

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	ret = hid_hw_raw_request(dev, dev->battery_report_id, buf, 4,
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				 dev->battery_report_type, HID_REQ_GET_REPORT);
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	if (ret < 2) {
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		kfree(buf);
		return -ENODATA;
	}

	ret = hidinput_scale_battery_capacity(dev, buf[1]);
	kfree(buf);
	return ret;
}

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static int hidinput_get_battery_property(struct power_supply *psy,
					 enum power_supply_property prop,
					 union power_supply_propval *val)
{
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	struct hid_device *dev = power_supply_get_drvdata(psy);
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	int value;
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	int ret = 0;

	switch (prop) {
	case POWER_SUPPLY_PROP_PRESENT:
	case POWER_SUPPLY_PROP_ONLINE:
		val->intval = 1;
		break;

	case POWER_SUPPLY_PROP_CAPACITY:
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		if (dev->battery_status != HID_BATTERY_REPORTED &&
		    !dev->battery_avoid_query) {
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			value = hidinput_query_battery_capacity(dev);
			if (value < 0)
				return value;
		} else  {
			value = dev->battery_capacity;
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		}

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		val->intval = value;
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		break;

	case POWER_SUPPLY_PROP_MODEL_NAME:
		val->strval = dev->name;
		break;

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	case POWER_SUPPLY_PROP_STATUS:
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		if (dev->battery_status != HID_BATTERY_REPORTED &&
		    !dev->battery_avoid_query) {
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			value = hidinput_query_battery_capacity(dev);
			if (value < 0)
				return value;

			dev->battery_capacity = value;
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			dev->battery_status = HID_BATTERY_QUERIED;
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		}

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		if (dev->battery_status == HID_BATTERY_UNKNOWN)
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			val->intval = POWER_SUPPLY_STATUS_UNKNOWN;
		else if (dev->battery_capacity == 100)
			val->intval = POWER_SUPPLY_STATUS_FULL;
		else
			val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
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		break;

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

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	default:
		ret = -EINVAL;
		break;
	}

	return ret;
}

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static int hidinput_setup_battery(struct hid_device *dev, unsigned report_type, struct hid_field *field)
432
{
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	struct power_supply_desc *psy_desc;
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	struct power_supply_config psy_cfg = { .drv_data = dev, };
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	unsigned quirks;
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	s32 min, max;
437
	int error;
438

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	if (dev->battery)
		return 0;	/* already initialized? */
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	quirks = find_battery_quirk(dev);

	hid_dbg(dev, "device %x:%x:%x %d quirks %d\n",
		dev->bus, dev->vendor, dev->product, dev->version, quirks);

	if (quirks & HID_BATTERY_QUIRK_IGNORE)
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		return 0;
449

450
	psy_desc = kzalloc(sizeof(*psy_desc), GFP_KERNEL);
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	if (!psy_desc)
		return -ENOMEM;
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	psy_desc->name = kasprintf(GFP_KERNEL, "hid-%s-battery",
				   strlen(dev->uniq) ?
					dev->uniq : dev_name(&dev->dev));
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	if (!psy_desc->name) {
		error = -ENOMEM;
		goto err_free_mem;
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	}

	psy_desc->type = POWER_SUPPLY_TYPE_BATTERY;
	psy_desc->properties = hidinput_battery_props;
	psy_desc->num_properties = ARRAY_SIZE(hidinput_battery_props);
	psy_desc->use_for_apm = 0;
	psy_desc->get_property = hidinput_get_battery_property;
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	min = field->logical_minimum;
	max = field->logical_maximum;

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	if (quirks & HID_BATTERY_QUIRK_PERCENT) {
		min = 0;
		max = 100;
	}

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	if (quirks & HID_BATTERY_QUIRK_FEATURE)
		report_type = HID_FEATURE_REPORT;

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	dev->battery_min = min;
	dev->battery_max = max;
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	dev->battery_report_type = report_type;
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	dev->battery_report_id = field->report->id;
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	/*
	 * Stylus is normally not connected to the device and thus we
	 * can't query the device and get meaningful battery strength.
	 * We have to wait for the device to report it on its own.
	 */
	dev->battery_avoid_query = report_type == HID_INPUT_REPORT &&
				   field->physical == HID_DG_STYLUS;

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	dev->battery = power_supply_register(&dev->dev, psy_desc, &psy_cfg);
	if (IS_ERR(dev->battery)) {
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		error = PTR_ERR(dev->battery);
		hid_warn(dev, "can't register power supply: %d\n", error);
		goto err_free_name;
497
	}
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	power_supply_powers(dev->battery, &dev->dev);
	return 0;

err_free_name:
	kfree(psy_desc->name);
err_free_mem:
	kfree(psy_desc);
	dev->battery = NULL;
	return error;
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}

static void hidinput_cleanup_battery(struct hid_device *dev)
{
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	const struct power_supply_desc *psy_desc;

514
	if (!dev->battery)
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		return;

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	psy_desc = dev->battery->desc;
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	power_supply_unregister(dev->battery);
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	kfree(psy_desc->name);
	kfree(psy_desc);
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	dev->battery = NULL;
522
}
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static void hidinput_update_battery(struct hid_device *dev, int value)
{
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	int capacity;

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	if (!dev->battery)
		return;

	if (value == 0 || value < dev->battery_min || value > dev->battery_max)
		return;

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	capacity = hidinput_scale_battery_capacity(dev, value);

536
	if (dev->battery_status != HID_BATTERY_REPORTED ||
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	    capacity != dev->battery_capacity ||
	    ktime_after(ktime_get_coarse(), dev->battery_ratelimit_time)) {
539
		dev->battery_capacity = capacity;
540
		dev->battery_status = HID_BATTERY_REPORTED;
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		dev->battery_ratelimit_time =
			ktime_add_ms(ktime_get_coarse(), 30 * 1000);
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		power_supply_changed(dev->battery);
	}
545
}
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#else  /* !CONFIG_HID_BATTERY_STRENGTH */
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static int hidinput_setup_battery(struct hid_device *dev, unsigned report_type,
				  struct hid_field *field)
549
{
550
	return 0;
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}

static void hidinput_cleanup_battery(struct hid_device *dev)
{
}
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static void hidinput_update_battery(struct hid_device *dev, int value)
{
}
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#endif	/* CONFIG_HID_BATTERY_STRENGTH */

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static void hidinput_configure_usage(struct hid_input *hidinput, struct hid_field *field,
				     struct hid_usage *usage)
{
	struct input_dev *input = hidinput->input;
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	struct hid_device *device = input_get_drvdata(input);
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	int max = 0, code;
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	unsigned long *bit = NULL;

	field->hidinput = hidinput;

	if (field->flags & HID_MAIN_ITEM_CONSTANT)
		goto ignore;

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	/* Ignore if report count is out of bounds. */
	if (field->report_count < 1)
		goto ignore;

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	/* only LED usages are supported in output fields */
	if (field->report_type == HID_OUTPUT_REPORT &&
			(usage->hid & HID_USAGE_PAGE) != HID_UP_LED) {
		goto ignore;
	}

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585 586 587 588 589 590 591 592 593
	if (device->driver->input_mapping) {
		int ret = device->driver->input_mapping(device, hidinput, field,
				usage, &bit, &max);
		if (ret > 0)
			goto mapped;
		if (ret < 0)
			goto ignore;
	}

594
	switch (usage->hid & HID_USAGE_PAGE) {
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	case HID_UP_UNDEFINED:
		goto ignore;
597

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598 599
	case HID_UP_KEYBOARD:
		set_bit(EV_REP, input->evbit);
600

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601 602 603 604 605
		if ((usage->hid & HID_USAGE) < 256) {
			if (!hid_keyboard[usage->hid & HID_USAGE]) goto ignore;
			map_key_clear(hid_keyboard[usage->hid & HID_USAGE]);
		} else
			map_key(KEY_UNKNOWN);
606

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		break;
608

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609
	case HID_UP_BUTTON:
610
		code = ((usage->hid - 1) & HID_USAGE);
611

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		switch (field->application) {
		case HID_GD_MOUSE:
614
		case HID_GD_POINTER:  code += BTN_MOUSE; break;
615
		case HID_GD_JOYSTICK:
616 617 618
				if (code <= 0xf)
					code += BTN_JOYSTICK;
				else
619 620 621 622 623 624 625
					code += BTN_TRIGGER_HAPPY - 0x10;
				break;
		case HID_GD_GAMEPAD:
				if (code <= 0xf)
					code += BTN_GAMEPAD;
				else
					code += BTN_TRIGGER_HAPPY - 0x10;
626
				break;
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627 628 629
		default:
			switch (field->physical) {
			case HID_GD_MOUSE:
630 631 632 633
			case HID_GD_POINTER:  code += BTN_MOUSE; break;
			case HID_GD_JOYSTICK: code += BTN_JOYSTICK; break;
			case HID_GD_GAMEPAD:  code += BTN_GAMEPAD; break;
			default:              code += BTN_MISC;
634
			}
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635
		}
636

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637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656
		map_key(code);
		break;

	case HID_UP_SIMULATION:
		switch (usage->hid & 0xffff) {
		case 0xba: map_abs(ABS_RUDDER);   break;
		case 0xbb: map_abs(ABS_THROTTLE); break;
		case 0xc4: map_abs(ABS_GAS);      break;
		case 0xc5: map_abs(ABS_BRAKE);    break;
		case 0xc8: map_abs(ABS_WHEEL);    break;
		default:   goto ignore;
		}
		break;

	case HID_UP_GENDESK:
		if ((usage->hid & 0xf0) == 0x80) {	/* SystemControl */
			switch (usage->hid & 0xf) {
			case 0x1: map_key_clear(KEY_POWER);  break;
			case 0x2: map_key_clear(KEY_SLEEP);  break;
			case 0x3: map_key_clear(KEY_WAKEUP); break;
657 658 659 660 661 662 663 664 665 666 667 668
			case 0x4: map_key_clear(KEY_CONTEXT_MENU); break;
			case 0x5: map_key_clear(KEY_MENU); break;
			case 0x6: map_key_clear(KEY_PROG1); break;
			case 0x7: map_key_clear(KEY_HELP); break;
			case 0x8: map_key_clear(KEY_EXIT); break;
			case 0x9: map_key_clear(KEY_SELECT); break;
			case 0xa: map_key_clear(KEY_RIGHT); break;
			case 0xb: map_key_clear(KEY_LEFT); break;
			case 0xc: map_key_clear(KEY_UP); break;
			case 0xd: map_key_clear(KEY_DOWN); break;
			case 0xe: map_key_clear(KEY_POWER2); break;
			case 0xf: map_key_clear(KEY_RESTART); break;
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			default: goto unknown;
670 671
			}
			break;
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672
		}
673

674 675 676 677 678 679 680 681
		if ((usage->hid & 0xf0) == 0xb0) {	/* SC - Display */
			switch (usage->hid & 0xf) {
			case 0x05: map_key_clear(KEY_SWITCHVIDEOMODE); break;
			default: goto ignore;
			}
			break;
		}

682 683 684 685 686 687 688 689 690
		/*
		 * Some lazy vendors declare 255 usages for System Control,
		 * leading to the creation of ABS_X|Y axis and too many others.
		 * It wouldn't be a problem if joydev doesn't consider the
		 * device as a joystick then.
		 */
		if (field->application == HID_GD_SYSTEM_CONTROL)
			goto ignore;

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691
		if ((usage->hid & 0xf0) == 0x90) {	/* D-pad */
692
			switch (usage->hid) {
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693 694 695 696 697
			case HID_GD_UP:	   usage->hat_dir = 1; break;
			case HID_GD_DOWN:  usage->hat_dir = 5; break;
			case HID_GD_RIGHT: usage->hat_dir = 3; break;
			case HID_GD_LEFT:  usage->hat_dir = 7; break;
			default: goto unknown;
698
			}
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699 700 701
			if (field->dpad) {
				map_abs(field->dpad);
				goto ignore;
702
			}
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703
			map_abs(ABS_HAT0X);
704
			break;
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705
		}
706

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707 708 709 710
		switch (usage->hid) {
		/* These usage IDs map directly to the usage codes. */
		case HID_GD_X: case HID_GD_Y: case HID_GD_Z:
		case HID_GD_RX: case HID_GD_RY: case HID_GD_RZ:
711 712 713 714 715 716
			if (field->flags & HID_MAIN_ITEM_RELATIVE)
				map_rel(usage->hid & 0xf);
			else
				map_abs_clear(usage->hid & 0xf);
			break;

717 718 719 720 721 722 723 724 725
		case HID_GD_WHEEL:
			if (field->flags & HID_MAIN_ITEM_RELATIVE) {
				set_bit(REL_WHEEL, input->relbit);
				map_rel(REL_WHEEL_HI_RES);
			} else {
				map_abs(usage->hid & 0xf);
			}
			break;
		case HID_GD_SLIDER: case HID_GD_DIAL:
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726 727 728 729 730
			if (field->flags & HID_MAIN_ITEM_RELATIVE)
				map_rel(usage->hid & 0xf);
			else
				map_abs(usage->hid & 0xf);
			break;
731

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732 733 734 735 736
		case HID_GD_HATSWITCH:
			usage->hat_min = field->logical_minimum;
			usage->hat_max = field->logical_maximum;
			map_abs(ABS_HAT0X);
			break;
737

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738 739
		case HID_GD_START:	map_key_clear(BTN_START);	break;
		case HID_GD_SELECT:	map_key_clear(BTN_SELECT);	break;
740

741 742
		case HID_GD_RFKILL_BTN:
			/* MS wireless radio ctl extension, also check CA */
743
			if (field->application == HID_GD_WIRELESS_RADIO_CTLS) {
744 745 746 747 748 749
				map_key_clear(KEY_RFKILL);
				/* We need to simulate the btn release */
				field->flags |= HID_MAIN_ITEM_RELATIVE;
				break;
			}

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		default: goto unknown;
		}
752

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753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773
		break;

	case HID_UP_LED:
		switch (usage->hid & 0xffff) {		      /* HID-Value:                   */
		case 0x01:  map_led (LED_NUML);     break;    /*   "Num Lock"                 */
		case 0x02:  map_led (LED_CAPSL);    break;    /*   "Caps Lock"                */
		case 0x03:  map_led (LED_SCROLLL);  break;    /*   "Scroll Lock"              */
		case 0x04:  map_led (LED_COMPOSE);  break;    /*   "Compose"                  */
		case 0x05:  map_led (LED_KANA);     break;    /*   "Kana"                     */
		case 0x27:  map_led (LED_SLEEP);    break;    /*   "Stand-By"                 */
		case 0x4c:  map_led (LED_SUSPEND);  break;    /*   "System Suspend"           */
		case 0x09:  map_led (LED_MUTE);     break;    /*   "Mute"                     */
		case 0x4b:  map_led (LED_MISC);     break;    /*   "Generic Indicator"        */
		case 0x19:  map_led (LED_MAIL);     break;    /*   "Message Waiting"          */
		case 0x4d:  map_led (LED_CHARGING); break;    /*   "External Power Connected" */

		default: goto ignore;
		}
		break;

	case HID_UP_DIGITIZER:
774 775 776 777 778
		if ((field->application & 0xff) == 0x01) /* Digitizer */
			__set_bit(INPUT_PROP_POINTER, input->propbit);
		else if ((field->application & 0xff) == 0x02) /* Pen */
			__set_bit(INPUT_PROP_DIRECT, input->propbit);

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		switch (usage->hid & 0xff) {
780 781 782
		case 0x00: /* Undefined */
			goto ignore;

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783 784 785 786 787
		case 0x30: /* TipPressure */
			if (!test_bit(BTN_TOUCH, input->keybit)) {
				device->quirks |= HID_QUIRK_NOTOUCH;
				set_bit(EV_KEY, input->evbit);
				set_bit(BTN_TOUCH, input->keybit);
788
			}
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789
			map_abs_clear(ABS_PRESSURE);
790 791
			break;

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792 793 794 795 796
		case 0x32: /* InRange */
			switch (field->physical & 0xff) {
			case 0x21: map_key(BTN_TOOL_MOUSE); break;
			case 0x22: map_key(BTN_TOOL_FINGER); break;
			default: map_key(BTN_TOOL_PEN); break;
797 798 799
			}
			break;

800 801 802
		case 0x3b: /* Battery Strength */
			hidinput_setup_battery(device, HID_INPUT_REPORT, field);
			usage->type = EV_PWR;
803
			return;
804

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		case 0x3c: /* Invert */
			map_key_clear(BTN_TOOL_RUBBER);
807 808
			break;

809 810 811 812 813 814 815 816
		case 0x3d: /* X Tilt */
			map_abs_clear(ABS_TILT_X);
			break;

		case 0x3e: /* Y Tilt */
			map_abs_clear(ABS_TILT_Y);
			break;

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		case 0x33: /* Touch */
		case 0x42: /* TipSwitch */
		case 0x43: /* TipSwitch2 */
			device->quirks &= ~HID_QUIRK_NOTOUCH;
			map_key_clear(BTN_TOUCH);
			break;
823

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824 825 826
		case 0x44: /* BarrelSwitch */
			map_key_clear(BTN_STYLUS);
			break;
827

828 829 830 831 832 833 834 835 836
		case 0x45: /* ERASER */
			/*
			 * This event is reported when eraser tip touches the surface.
			 * Actual eraser (BTN_TOOL_RUBBER) is set by Invert usage when
			 * tool gets in proximity.
			 */
			map_key_clear(BTN_TOUCH);
			break;

837
		case 0x46: /* TabletPick */
838
		case 0x5a: /* SecondaryBarrelSwitch */
839 840 841
			map_key_clear(BTN_STYLUS2);
			break;

842
		case 0x5b: /* TransducerSerialNumber */
843 844 845 846
			usage->type = EV_MSC;
			usage->code = MSC_SERIAL;
			bit = input->mscbit;
			max = MSC_MAX;
847 848
			break;

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		default:  goto unknown;
		}
		break;

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	case HID_UP_TELEPHONY:
		switch (usage->hid & HID_USAGE) {
		case 0x2f: map_key_clear(KEY_MICMUTE);		break;
		case 0xb0: map_key_clear(KEY_NUMERIC_0);	break;
		case 0xb1: map_key_clear(KEY_NUMERIC_1);	break;
		case 0xb2: map_key_clear(KEY_NUMERIC_2);	break;
		case 0xb3: map_key_clear(KEY_NUMERIC_3);	break;
		case 0xb4: map_key_clear(KEY_NUMERIC_4);	break;
		case 0xb5: map_key_clear(KEY_NUMERIC_5);	break;
		case 0xb6: map_key_clear(KEY_NUMERIC_6);	break;
		case 0xb7: map_key_clear(KEY_NUMERIC_7);	break;
		case 0xb8: map_key_clear(KEY_NUMERIC_8);	break;
		case 0xb9: map_key_clear(KEY_NUMERIC_9);	break;
		case 0xba: map_key_clear(KEY_NUMERIC_STAR);	break;
		case 0xbb: map_key_clear(KEY_NUMERIC_POUND);	break;
		case 0xbc: map_key_clear(KEY_NUMERIC_A);	break;
		case 0xbd: map_key_clear(KEY_NUMERIC_B);	break;
		case 0xbe: map_key_clear(KEY_NUMERIC_C);	break;
		case 0xbf: map_key_clear(KEY_NUMERIC_D);	break;
		default: goto ignore;
		}
		break;

876
	case HID_UP_CONSUMER:	/* USB HUT v1.12, pages 75-84 */
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		switch (usage->hid & HID_USAGE) {
		case 0x000: goto ignore;
879 880 881
		case 0x030: map_key_clear(KEY_POWER);		break;
		case 0x031: map_key_clear(KEY_RESTART);		break;
		case 0x032: map_key_clear(KEY_SLEEP);		break;
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		case 0x034: map_key_clear(KEY_SLEEP);		break;
883
		case 0x035: map_key_clear(KEY_KBDILLUMTOGGLE);	break;
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		case 0x036: map_key_clear(BTN_MISC);		break;

886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903
		case 0x040: map_key_clear(KEY_MENU);		break; /* Menu */
		case 0x041: map_key_clear(KEY_SELECT);		break; /* Menu Pick */
		case 0x042: map_key_clear(KEY_UP);		break; /* Menu Up */
		case 0x043: map_key_clear(KEY_DOWN);		break; /* Menu Down */
		case 0x044: map_key_clear(KEY_LEFT);		break; /* Menu Left */
		case 0x045: map_key_clear(KEY_RIGHT);		break; /* Menu Right */
		case 0x046: map_key_clear(KEY_ESC);		break; /* Menu Escape */
		case 0x047: map_key_clear(KEY_KPPLUS);		break; /* Menu Value Increase */
		case 0x048: map_key_clear(KEY_KPMINUS);		break; /* Menu Value Decrease */

		case 0x060: map_key_clear(KEY_INFO);		break; /* Data On Screen */
		case 0x061: map_key_clear(KEY_SUBTITLE);	break; /* Closed Caption */
		case 0x063: map_key_clear(KEY_VCR);		break; /* VCR/TV */
		case 0x065: map_key_clear(KEY_CAMERA);		break; /* Snapshot */
		case 0x069: map_key_clear(KEY_RED);		break;
		case 0x06a: map_key_clear(KEY_GREEN);		break;
		case 0x06b: map_key_clear(KEY_BLUE);		break;
		case 0x06c: map_key_clear(KEY_YELLOW);		break;
904
		case 0x06d: map_key_clear(KEY_ASPECT_RATIO);	break;
905

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		case 0x06f: map_key_clear(KEY_BRIGHTNESSUP);		break;
		case 0x070: map_key_clear(KEY_BRIGHTNESSDOWN);		break;
		case 0x072: map_key_clear(KEY_BRIGHTNESS_TOGGLE);	break;
		case 0x073: map_key_clear(KEY_BRIGHTNESS_MIN);		break;
		case 0x074: map_key_clear(KEY_BRIGHTNESS_MAX);		break;
		case 0x075: map_key_clear(KEY_BRIGHTNESS_AUTO);		break;

913 914 915 916
		case 0x079: map_key_clear(KEY_KBDILLUMUP);	break;
		case 0x07a: map_key_clear(KEY_KBDILLUMDOWN);	break;
		case 0x07c: map_key_clear(KEY_KBDILLUMTOGGLE);	break;

917
		case 0x082: map_key_clear(KEY_VIDEO_NEXT);	break;
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		case 0x083: map_key_clear(KEY_LAST);		break;
919
		case 0x084: map_key_clear(KEY_ENTER);		break;
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920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952
		case 0x088: map_key_clear(KEY_PC);		break;
		case 0x089: map_key_clear(KEY_TV);		break;
		case 0x08a: map_key_clear(KEY_WWW);		break;
		case 0x08b: map_key_clear(KEY_DVD);		break;
		case 0x08c: map_key_clear(KEY_PHONE);		break;
		case 0x08d: map_key_clear(KEY_PROGRAM);		break;
		case 0x08e: map_key_clear(KEY_VIDEOPHONE);	break;
		case 0x08f: map_key_clear(KEY_GAMES);		break;
		case 0x090: map_key_clear(KEY_MEMO);		break;
		case 0x091: map_key_clear(KEY_CD);		break;
		case 0x092: map_key_clear(KEY_VCR);		break;
		case 0x093: map_key_clear(KEY_TUNER);		break;
		case 0x094: map_key_clear(KEY_EXIT);		break;
		case 0x095: map_key_clear(KEY_HELP);		break;
		case 0x096: map_key_clear(KEY_TAPE);		break;
		case 0x097: map_key_clear(KEY_TV2);		break;
		case 0x098: map_key_clear(KEY_SAT);		break;
		case 0x09a: map_key_clear(KEY_PVR);		break;

		case 0x09c: map_key_clear(KEY_CHANNELUP);	break;
		case 0x09d: map_key_clear(KEY_CHANNELDOWN);	break;
		case 0x0a0: map_key_clear(KEY_VCR2);		break;

		case 0x0b0: map_key_clear(KEY_PLAY);		break;
		case 0x0b1: map_key_clear(KEY_PAUSE);		break;
		case 0x0b2: map_key_clear(KEY_RECORD);		break;
		case 0x0b3: map_key_clear(KEY_FASTFORWARD);	break;
		case 0x0b4: map_key_clear(KEY_REWIND);		break;
		case 0x0b5: map_key_clear(KEY_NEXTSONG);	break;
		case 0x0b6: map_key_clear(KEY_PREVIOUSSONG);	break;
		case 0x0b7: map_key_clear(KEY_STOPCD);		break;
		case 0x0b8: map_key_clear(KEY_EJECTCD);		break;
		case 0x0bc: map_key_clear(KEY_MEDIA_REPEAT);	break;
953 954
		case 0x0b9: map_key_clear(KEY_SHUFFLE);		break;
		case 0x0bf: map_key_clear(KEY_SLOW);		break;
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		case 0x0cd: map_key_clear(KEY_PLAYPAUSE);	break;
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		case 0x0cf: map_key_clear(KEY_VOICECOMMAND);	break;
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		case 0x0e0: map_abs_clear(ABS_VOLUME);		break;
		case 0x0e2: map_key_clear(KEY_MUTE);		break;
		case 0x0e5: map_key_clear(KEY_BASSBOOST);	break;
		case 0x0e9: map_key_clear(KEY_VOLUMEUP);	break;
		case 0x0ea: map_key_clear(KEY_VOLUMEDOWN);	break;
963
		case 0x0f5: map_key_clear(KEY_SLOW);		break;
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964

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		case 0x181: map_key_clear(KEY_BUTTONCONFIG);	break;
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966 967 968 969 970 971 972 973 974 975 976 977 978
		case 0x182: map_key_clear(KEY_BOOKMARKS);	break;
		case 0x183: map_key_clear(KEY_CONFIG);		break;
		case 0x184: map_key_clear(KEY_WORDPROCESSOR);	break;
		case 0x185: map_key_clear(KEY_EDITOR);		break;
		case 0x186: map_key_clear(KEY_SPREADSHEET);	break;
		case 0x187: map_key_clear(KEY_GRAPHICSEDITOR);	break;
		case 0x188: map_key_clear(KEY_PRESENTATION);	break;
		case 0x189: map_key_clear(KEY_DATABASE);	break;
		case 0x18a: map_key_clear(KEY_MAIL);		break;
		case 0x18b: map_key_clear(KEY_NEWS);		break;
		case 0x18c: map_key_clear(KEY_VOICEMAIL);	break;
		case 0x18d: map_key_clear(KEY_ADDRESSBOOK);	break;
		case 0x18e: map_key_clear(KEY_CALENDAR);	break;
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		case 0x18f: map_key_clear(KEY_TASKMANAGER);	break;
		case 0x190: map_key_clear(KEY_JOURNAL);		break;
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981 982
		case 0x191: map_key_clear(KEY_FINANCE);		break;
		case 0x192: map_key_clear(KEY_CALC);		break;
983
		case 0x193: map_key_clear(KEY_PLAYER);		break;
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984 985
		case 0x194: map_key_clear(KEY_FILE);		break;
		case 0x196: map_key_clear(KEY_WWW);		break;
986
		case 0x199: map_key_clear(KEY_CHAT);		break;
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987 988
		case 0x19c: map_key_clear(KEY_LOGOFF);		break;
		case 0x19e: map_key_clear(KEY_COFFEE);		break;
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Olivier Gay 已提交
989 990
		case 0x19f: map_key_clear(KEY_CONTROLPANEL);		break;
		case 0x1a2: map_key_clear(KEY_APPSELECT);		break;
991 992
		case 0x1a3: map_key_clear(KEY_NEXT);		break;
		case 0x1a4: map_key_clear(KEY_PREVIOUS);	break;
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993 994 995
		case 0x1a6: map_key_clear(KEY_HELP);		break;
		case 0x1a7: map_key_clear(KEY_DOCUMENTS);	break;
		case 0x1ab: map_key_clear(KEY_SPELLCHECK);	break;
996
		case 0x1ae: map_key_clear(KEY_KEYBOARD);	break;
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Olivier Gay 已提交
997
		case 0x1b1: map_key_clear(KEY_SCREENSAVER);		break;
998
		case 0x1b4: map_key_clear(KEY_FILE);		break;
999 1000 1001
		case 0x1b6: map_key_clear(KEY_IMAGES);		break;
		case 0x1b7: map_key_clear(KEY_AUDIO);		break;
		case 0x1b8: map_key_clear(KEY_VIDEO);		break;
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1002 1003
		case 0x1bc: map_key_clear(KEY_MESSENGER);	break;
		case 0x1bd: map_key_clear(KEY_INFO);		break;
1004
		case 0x1cb: map_key_clear(KEY_ASSISTANT);	break;
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1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027
		case 0x201: map_key_clear(KEY_NEW);		break;
		case 0x202: map_key_clear(KEY_OPEN);		break;
		case 0x203: map_key_clear(KEY_CLOSE);		break;
		case 0x204: map_key_clear(KEY_EXIT);		break;
		case 0x207: map_key_clear(KEY_SAVE);		break;
		case 0x208: map_key_clear(KEY_PRINT);		break;
		case 0x209: map_key_clear(KEY_PROPS);		break;
		case 0x21a: map_key_clear(KEY_UNDO);		break;
		case 0x21b: map_key_clear(KEY_COPY);		break;
		case 0x21c: map_key_clear(KEY_CUT);		break;
		case 0x21d: map_key_clear(KEY_PASTE);		break;
		case 0x21f: map_key_clear(KEY_FIND);		break;
		case 0x221: map_key_clear(KEY_SEARCH);		break;
		case 0x222: map_key_clear(KEY_GOTO);		break;
		case 0x223: map_key_clear(KEY_HOMEPAGE);	break;
		case 0x224: map_key_clear(KEY_BACK);		break;
		case 0x225: map_key_clear(KEY_FORWARD);		break;
		case 0x226: map_key_clear(KEY_STOP);		break;
		case 0x227: map_key_clear(KEY_REFRESH);		break;
		case 0x22a: map_key_clear(KEY_BOOKMARKS);	break;
		case 0x22d: map_key_clear(KEY_ZOOMIN);		break;
		case 0x22e: map_key_clear(KEY_ZOOMOUT);		break;
		case 0x22f: map_key_clear(KEY_ZOOMRESET);	break;
1028
		case 0x232: map_key_clear(KEY_FULL_SCREEN);	break;
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1029 1030
		case 0x233: map_key_clear(KEY_SCROLLUP);	break;
		case 0x234: map_key_clear(KEY_SCROLLDOWN);	break;
1031 1032 1033 1034
		case 0x238: /* AC Pan */
			set_bit(REL_HWHEEL, input->relbit);
			map_rel(REL_HWHEEL_HI_RES);
			break;
1035
		case 0x23d: map_key_clear(KEY_EDIT);		break;
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1036
		case 0x25f: map_key_clear(KEY_CANCEL);		break;
1037 1038
		case 0x269: map_key_clear(KEY_INSERT);		break;
		case 0x26a: map_key_clear(KEY_DELETE);		break;
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1039 1040 1041 1042 1043 1044
		case 0x279: map_key_clear(KEY_REDO);		break;

		case 0x289: map_key_clear(KEY_REPLY);		break;
		case 0x28b: map_key_clear(KEY_FORWARDMAIL);	break;
		case 0x28c: map_key_clear(KEY_SEND);		break;

1045 1046
		case 0x29d: map_key_clear(KEY_KBD_LAYOUT_NEXT);	break;

1047 1048 1049 1050 1051 1052 1053
		case 0x2c7: map_key_clear(KEY_KBDINPUTASSIST_PREV);		break;
		case 0x2c8: map_key_clear(KEY_KBDINPUTASSIST_NEXT);		break;
		case 0x2c9: map_key_clear(KEY_KBDINPUTASSIST_PREVGROUP);		break;
		case 0x2ca: map_key_clear(KEY_KBDINPUTASSIST_NEXTGROUP);		break;
		case 0x2cb: map_key_clear(KEY_KBDINPUTASSIST_ACCEPT);	break;
		case 0x2cc: map_key_clear(KEY_KBDINPUTASSIST_CANCEL);	break;

1054 1055
		case 0x29f: map_key_clear(KEY_SCALE);		break;

1056
		default: map_key_clear(KEY_UNKNOWN);
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1057 1058 1059
		}
		break;

1060
	case HID_UP_GENDEVCTRLS:
1061 1062 1063 1064
		switch (usage->hid) {
		case HID_DC_BATTERYSTRENGTH:
			hidinput_setup_battery(device, HID_INPUT_REPORT, field);
			usage->type = EV_PWR;
1065
			return;
1066 1067
		}
		goto unknown;
1068

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1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083
	case HID_UP_HPVENDOR:	/* Reported on a Dutch layout HP5308 */
		set_bit(EV_REP, input->evbit);
		switch (usage->hid & HID_USAGE) {
		case 0x021: map_key_clear(KEY_PRINT);           break;
		case 0x070: map_key_clear(KEY_HP);		break;
		case 0x071: map_key_clear(KEY_CAMERA);		break;
		case 0x072: map_key_clear(KEY_SOUND);		break;
		case 0x073: map_key_clear(KEY_QUESTION);	break;
		case 0x080: map_key_clear(KEY_EMAIL);		break;
		case 0x081: map_key_clear(KEY_CHAT);		break;
		case 0x082: map_key_clear(KEY_SEARCH);		break;
		case 0x083: map_key_clear(KEY_CONNECT);	        break;
		case 0x084: map_key_clear(KEY_FINANCE);		break;
		case 0x085: map_key_clear(KEY_SPORT);		break;
		case 0x086: map_key_clear(KEY_SHOP);	        break;
1084 1085 1086 1087 1088 1089 1090
		default:    goto ignore;
		}
		break;

	case HID_UP_HPVENDOR2:
		set_bit(EV_REP, input->evbit);
		switch (usage->hid & HID_USAGE) {
1091
		case 0x001: map_key_clear(KEY_MICMUTE);		break;
1092 1093
		case 0x003: map_key_clear(KEY_BRIGHTNESSDOWN);	break;
		case 0x004: map_key_clear(KEY_BRIGHTNESSUP);	break;
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1094 1095 1096
		default:    goto ignore;
		}
		break;
1097

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1098 1099
	case HID_UP_MSVENDOR:
		goto ignore;
1100

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1101 1102 1103
	case HID_UP_CUSTOM: /* Reported on Logitech and Apple USB keyboards */
		set_bit(EV_REP, input->evbit);
		goto ignore;
1104

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1105
	case HID_UP_LOGIVENDOR:
1106 1107 1108 1109
		/* intentional fallback */
	case HID_UP_LOGIVENDOR2:
		/* intentional fallback */
	case HID_UP_LOGIVENDOR3:
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1110
		goto ignore;
1111

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1112 1113 1114 1115 1116 1117
	case HID_UP_PID:
		switch (usage->hid & HID_USAGE) {
		case 0xa4: map_key_clear(BTN_DEAD);	break;
		default: goto ignore;
		}
		break;
1118

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1119 1120 1121 1122 1123
	default:
	unknown:
		if (field->report_size == 1) {
			if (field->report->type == HID_OUTPUT_REPORT) {
				map_led(LED_MISC);
1124 1125
				break;
			}
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1126
			map_key(BTN_MISC);
1127
			break;
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1128 1129 1130 1131 1132 1133 1134
		}
		if (field->flags & HID_MAIN_ITEM_RELATIVE) {
			map_rel(REL_MISC);
			break;
		}
		map_abs(ABS_MISC);
		break;
1135 1136
	}

1137
mapped:
1138 1139 1140 1141
	/* Mapping failed, bail out */
	if (!bit)
		return;

1142 1143 1144 1145 1146 1147 1148 1149 1150
	if (device->driver->input_mapped &&
	    device->driver->input_mapped(device, hidinput, field, usage,
					 &bit, &max) < 0) {
		/*
		 * The driver indicated that no further generic handling
		 * of the usage is desired.
		 */
		return;
	}
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1151

1152 1153
	set_bit(usage->type, input->evbit);

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
	/*
	 * This part is *really* controversial:
	 * - HID aims at being generic so we should do our best to export
	 *   all incoming events
	 * - HID describes what events are, so there is no reason for ABS_X
	 *   to be mapped to ABS_Y
	 * - HID is using *_MISC+N as a default value, but nothing prevents
	 *   *_MISC+N to overwrite a legitimate even, which confuses userspace
	 *   (for instance ABS_MISC + 7 is ABS_MT_SLOT, which has a different
	 *   processing)
	 *
	 * If devices still want to use this (at their own risk), they will
	 * have to use the quirk HID_QUIRK_INCREMENT_USAGE_ON_DUPLICATE, but
	 * the default should be a reliable mapping.
	 */
	while (usage->code <= max && test_and_set_bit(usage->code, bit)) {
		if (device->quirks & HID_QUIRK_INCREMENT_USAGE_ON_DUPLICATE) {
			usage->code = find_next_zero_bit(bit,
							 max + 1,
							 usage->code);
		} else {
			device->status |= HID_STAT_DUP_DETECTED;
			goto ignore;
		}
	}
1179 1180 1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192 1193 1194 1195 1196

	if (usage->code > max)
		goto ignore;

	if (usage->type == EV_ABS) {

		int a = field->logical_minimum;
		int b = field->logical_maximum;

		if ((device->quirks & HID_QUIRK_BADPAD) && (usage->code == ABS_X || usage->code == ABS_Y)) {
			a = field->logical_minimum = 0;
			b = field->logical_maximum = 255;
		}

		if (field->application == HID_GD_GAMEPAD || field->application == HID_GD_JOYSTICK)
			input_set_abs_params(input, usage->code, a, b, (b - a) >> 8, (b - a) >> 4);
		else	input_set_abs_params(input, usage->code, a, b, 0, 0);

1197 1198 1199
		input_abs_set_res(input, usage->code,
				  hidinput_calc_abs_res(field, usage->code));

1200 1201 1202
		/* use a larger default input buffer for MT devices */
		if (usage->code == ABS_MT_POSITION_X && input->hint_events_per_packet == 0)
			input_set_events_per_packet(input, 60);
1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215
	}

	if (usage->type == EV_ABS &&
	    (usage->hat_min < usage->hat_max || usage->hat_dir)) {
		int i;
		for (i = usage->code; i < usage->code + 2 && i <= max; i++) {
			input_set_abs_params(input, i, -1, 1, 0, 0);
			set_bit(i, input->absbit);
		}
		if (usage->hat_dir && !field->dpad)
			field->dpad = usage->code;
	}

1216 1217 1218 1219 1220 1221 1222 1223 1224 1225
	/* for those devices which produce Consumer volume usage as relative,
	 * we emulate pressing volumeup/volumedown appropriate number of times
	 * in hidinput_hid_event()
	 */
	if ((usage->type == EV_ABS) && (field->flags & HID_MAIN_ITEM_RELATIVE) &&
			(usage->code == ABS_VOLUME)) {
		set_bit(KEY_VOLUMEUP, input->keybit);
		set_bit(KEY_VOLUMEDOWN, input->keybit);
	}

1226 1227 1228 1229 1230
	if (usage->type == EV_KEY) {
		set_bit(EV_MSC, input->evbit);
		set_bit(MSC_SCAN, input->mscbit);
	}

1231
	return;
1232

1233 1234 1235
ignore:
	usage->type = 0;
	usage->code = 0;
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
static void hidinput_handle_scroll(struct hid_usage *usage,
				   struct input_dev *input,
				   __s32 value)
{
	int code;
	int hi_res, lo_res;

	if (value == 0)
		return;

	if (usage->code == REL_WHEEL_HI_RES)
		code = REL_WHEEL;
	else
		code = REL_HWHEEL;

	/*
	 * Windows reports one wheel click as value 120. Where a high-res
	 * scroll wheel is present, a fraction of 120 is reported instead.
	 * Our REL_WHEEL_HI_RES axis does the same because all HW must
	 * adhere to the 120 expectation.
	 */
	hi_res = value * 120/usage->resolution_multiplier;

	usage->wheel_accumulated += hi_res;
	lo_res = usage->wheel_accumulated/120;
	if (lo_res)
		usage->wheel_accumulated -= lo_res * 120;

	input_event(input, EV_REL, code, lo_res);
	input_event(input, EV_REL, usage->code, hi_res);
}

1270 1271 1272
void hidinput_hid_event(struct hid_device *hid, struct hid_field *field, struct hid_usage *usage, __s32 value)
{
	struct input_dev *input;
A
Al Viro 已提交
1273
	unsigned *quirks = &hid->quirks;
1274

1275
	if (!usage->type)
1276 1277
		return;

1278 1279 1280 1281
	if (usage->type == EV_PWR) {
		hidinput_update_battery(hid, value);
		return;
	}
1282

1283
	if (!field->hidinput)
1284 1285
		return;

1286 1287
	input = field->hidinput->input;

1288 1289 1290 1291 1292 1293
	if (usage->hat_min < usage->hat_max || usage->hat_dir) {
		int hat_dir = usage->hat_dir;
		if (!hat_dir)
			hat_dir = (value - usage->hat_min) * 8 / (usage->hat_max - usage->hat_min + 1) + 1;
		if (hat_dir < 0 || hat_dir > 8) hat_dir = 0;
		input_event(input, usage->type, usage->code    , hid_hat_to_axis[hat_dir].x);
1294 1295 1296
		input_event(input, usage->type, usage->code + 1, hid_hat_to_axis[hat_dir].y);
		return;
	}
1297 1298 1299 1300 1301 1302 1303 1304 1305 1306 1307 1308 1309 1310 1311 1312 1313 1314 1315 1316 1317 1318 1319

	if (usage->hid == (HID_UP_DIGITIZER | 0x003c)) { /* Invert */
		*quirks = value ? (*quirks | HID_QUIRK_INVERT) : (*quirks & ~HID_QUIRK_INVERT);
		return;
	}

	if (usage->hid == (HID_UP_DIGITIZER | 0x0032)) { /* InRange */
		if (value) {
			input_event(input, usage->type, (*quirks & HID_QUIRK_INVERT) ? BTN_TOOL_RUBBER : usage->code, 1);
			return;
		}
		input_event(input, usage->type, usage->code, 0);
		input_event(input, usage->type, BTN_TOOL_RUBBER, 0);
		return;
	}

	if (usage->hid == (HID_UP_DIGITIZER | 0x0030) && (*quirks & HID_QUIRK_NOTOUCH)) { /* Pressure */
		int a = field->logical_minimum;
		int b = field->logical_maximum;
		input_event(input, EV_KEY, BTN_TOUCH, value > a + ((b - a) >> 3));
	}

	if (usage->hid == (HID_UP_PID | 0x83UL)) { /* Simultaneous Effects Max */
1320
		dbg_hid("Maximum Effects - %d\n",value);
1321 1322 1323 1324
		return;
	}

	if (usage->hid == (HID_UP_PID | 0x7fUL)) {
1325
		dbg_hid("PID Pool Report\n");
1326 1327 1328 1329 1330 1331
		return;
	}

	if ((usage->type == EV_KEY) && (usage->code == 0)) /* Key 0 is "unassigned", not KEY_UNKNOWN */
		return;

1332 1333 1334 1335 1336 1337
	if ((usage->type == EV_REL) && (usage->code == REL_WHEEL_HI_RES ||
					usage->code == REL_HWHEEL_HI_RES)) {
		hidinput_handle_scroll(usage, input, value);
		return;
	}

1338 1339 1340 1341 1342 1343 1344 1345 1346 1347 1348 1349 1350 1351 1352
	if ((usage->type == EV_ABS) && (field->flags & HID_MAIN_ITEM_RELATIVE) &&
			(usage->code == ABS_VOLUME)) {
		int count = abs(value);
		int direction = value > 0 ? KEY_VOLUMEUP : KEY_VOLUMEDOWN;
		int i;

		for (i = 0; i < count; i++) {
			input_event(input, EV_KEY, direction, 1);
			input_sync(input);
			input_event(input, EV_KEY, direction, 0);
			input_sync(input);
		}
		return;
	}

1353 1354
	/*
	 * Ignore out-of-range values as per HID specification,
1355 1356 1357 1358
	 * section 5.10 and 6.2.25, when NULL state bit is present.
	 * When it's not, clamp the value to match Microsoft's input
	 * driver as mentioned in "Required HID usages for digitizers":
	 * https://msdn.microsoft.com/en-us/library/windows/hardware/dn672278(v=vs.85).asp
1359 1360 1361 1362
	 *
	 * The logical_minimum < logical_maximum check is done so that we
	 * don't unintentionally discard values sent by devices which
	 * don't specify logical min and max.
1363 1364
	 */
	if ((field->flags & HID_MAIN_ITEM_VARIABLE) &&
1365 1366 1367 1368 1369 1370 1371 1372 1373 1374
	    (field->logical_minimum < field->logical_maximum)) {
		if (field->flags & HID_MAIN_ITEM_NULL_STATE &&
		    (value < field->logical_minimum ||
		     value > field->logical_maximum)) {
			dbg_hid("Ignoring out-of-range value %x\n", value);
			return;
		}
		value = clamp(value,
			      field->logical_minimum,
			      field->logical_maximum);
1375 1376
	}

1377 1378 1379 1380 1381 1382 1383 1384 1385 1386 1387 1388
	/*
	 * Ignore reports for absolute data if the data didn't change. This is
	 * not only an optimization but also fixes 'dead' key reports. Some
	 * RollOver implementations for localized keys (like BACKSLASH/PIPE; HID
	 * 0x31 and 0x32) report multiple keys, even though a localized keyboard
	 * can only have one of them physically available. The 'dead' keys
	 * report constant 0. As all map to the same keycode, they'd confuse
	 * the input layer. If we filter the 'dead' keys on the HID level, we
	 * skip the keycode translation and only forward real events.
	 */
	if (!(field->flags & (HID_MAIN_ITEM_RELATIVE |
	                      HID_MAIN_ITEM_BUFFERED_BYTE)) &&
1389
			      (field->flags & HID_MAIN_ITEM_VARIABLE) &&
1390 1391 1392 1393
	    usage->usage_index < field->maxusage &&
	    value == field->value[usage->usage_index])
		return;

1394
	/* report the usage code as scancode if the key status has changed */
1395 1396
	if (usage->type == EV_KEY &&
	    (!test_bit(usage->code, input->key)) == value)
1397
		input_event(input, EV_MSC, MSC_SCAN, usage->hid);
1398

1399 1400
	input_event(input, usage->type, usage->code, value);

1401 1402 1403
	if ((field->flags & HID_MAIN_ITEM_RELATIVE) &&
	    usage->type == EV_KEY && value) {
		input_sync(input);
1404
		input_event(input, usage->type, usage->code, 0);
1405
	}
1406 1407 1408 1409 1410 1411
}

void hidinput_report_event(struct hid_device *hid, struct hid_report *report)
{
	struct hid_input *hidinput;

1412 1413 1414
	if (hid->quirks & HID_QUIRK_NO_INPUT_SYNC)
		return;

1415 1416 1417
	list_for_each_entry(hidinput, &hid->inputs, list)
		input_sync(hidinput->input);
}
J
Jiri Kosina 已提交
1418
EXPORT_SYMBOL_GPL(hidinput_report_event);
1419

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Jiri Kosina 已提交
1420
int hidinput_find_field(struct hid_device *hid, unsigned int type, unsigned int code, struct hid_field **field)
1421 1422 1423 1424 1425 1426 1427 1428 1429 1430 1431 1432 1433 1434
{
	struct hid_report *report;
	int i, j;

	list_for_each_entry(report, &hid->report_enum[HID_OUTPUT_REPORT].report_list, list) {
		for (i = 0; i < report->maxfield; i++) {
			*field = report->field[i];
			for (j = 0; j < (*field)->maxusage; j++)
				if ((*field)->usage[j].type == type && (*field)->usage[j].code == code)
					return j;
		}
	}
	return -1;
}
J
Jiri Kosina 已提交
1435
EXPORT_SYMBOL_GPL(hidinput_find_field);
1436

1437 1438 1439 1440 1441 1442 1443 1444 1445 1446 1447 1448 1449 1450 1451 1452 1453 1454 1455 1456 1457 1458 1459 1460 1461 1462 1463 1464 1465 1466 1467 1468 1469 1470 1471 1472 1473 1474 1475 1476 1477 1478
struct hid_field *hidinput_get_led_field(struct hid_device *hid)
{
	struct hid_report *report;
	struct hid_field *field;
	int i, j;

	list_for_each_entry(report,
			    &hid->report_enum[HID_OUTPUT_REPORT].report_list,
			    list) {
		for (i = 0; i < report->maxfield; i++) {
			field = report->field[i];
			for (j = 0; j < field->maxusage; j++)
				if (field->usage[j].type == EV_LED)
					return field;
		}
	}
	return NULL;
}
EXPORT_SYMBOL_GPL(hidinput_get_led_field);

unsigned int hidinput_count_leds(struct hid_device *hid)
{
	struct hid_report *report;
	struct hid_field *field;
	int i, j;
	unsigned int count = 0;

	list_for_each_entry(report,
			    &hid->report_enum[HID_OUTPUT_REPORT].report_list,
			    list) {
		for (i = 0; i < report->maxfield; i++) {
			field = report->field[i];
			for (j = 0; j < field->maxusage; j++)
				if (field->usage[j].type == EV_LED &&
				    field->value[j])
					count += 1;
		}
	}
	return count;
}
EXPORT_SYMBOL_GPL(hidinput_count_leds);

1479 1480 1481 1482 1483 1484
static void hidinput_led_worker(struct work_struct *work)
{
	struct hid_device *hid = container_of(work, struct hid_device,
					      led_work);
	struct hid_field *field;
	struct hid_report *report;
A
Aaron Ma 已提交
1485 1486
	int ret;
	u32 len;
1487 1488 1489 1490 1491 1492 1493 1494 1495 1496 1497 1498 1499 1500 1501 1502 1503 1504 1505 1506 1507 1508 1509 1510 1511 1512
	__u8 *buf;

	field = hidinput_get_led_field(hid);
	if (!field)
		return;

	/*
	 * field->report is accessed unlocked regarding HID core. So there might
	 * be another incoming SET-LED request from user-space, which changes
	 * the LED state while we assemble our outgoing buffer. However, this
	 * doesn't matter as hid_output_report() correctly converts it into a
	 * boolean value no matter what information is currently set on the LED
	 * field (even garbage). So the remote device will always get a valid
	 * request.
	 * And in case we send a wrong value, a next led worker is spawned
	 * for every SET-LED request so the following worker will send the
	 * correct value, guaranteed!
	 */

	report = field->report;

	/* use custom SET_REPORT request if possible (asynchronous) */
	if (hid->ll_driver->request)
		return hid->ll_driver->request(hid, report, HID_REQ_SET_REPORT);

	/* fall back to generic raw-output-report */
1513
	len = hid_report_len(report);
B
Benjamin Tissoires 已提交
1514
	buf = hid_alloc_report_buf(report, GFP_KERNEL);
1515 1516 1517 1518 1519
	if (!buf)
		return;

	hid_output_report(report, buf);
	/* synchronous output report */
1520 1521 1522 1523
	ret = hid_hw_output_report(hid, buf, len);
	if (ret == -ENOSYS)
		hid_hw_raw_request(hid, report->id, buf, len, HID_OUTPUT_REPORT,
				HID_REQ_SET_REPORT);
1524 1525 1526 1527 1528 1529 1530 1531 1532 1533 1534 1535 1536 1537 1538 1539 1540 1541 1542 1543 1544 1545 1546 1547 1548 1549 1550
	kfree(buf);
}

static int hidinput_input_event(struct input_dev *dev, unsigned int type,
				unsigned int code, int value)
{
	struct hid_device *hid = input_get_drvdata(dev);
	struct hid_field *field;
	int offset;

	if (type == EV_FF)
		return input_ff_event(dev, type, code, value);

	if (type != EV_LED)
		return -1;

	if ((offset = hidinput_find_field(hid, type, code, &field)) == -1) {
		hid_warn(dev, "event field not found\n");
		return -1;
	}

	hid_set_field(field, offset, value);

	schedule_work(&hid->led_work);
	return 0;
}

1551 1552
static int hidinput_open(struct input_dev *dev)
{
1553 1554
	struct hid_device *hid = input_get_drvdata(dev);

1555
	return hid_hw_open(hid);
1556 1557 1558 1559
}

static void hidinput_close(struct input_dev *dev)
{
1560 1561
	struct hid_device *hid = input_get_drvdata(dev);

1562
	hid_hw_close(hid);
1563 1564
}

1565 1566
static bool __hidinput_change_resolution_multipliers(struct hid_device *hid,
		struct hid_report *report, bool use_logical_max)
1567 1568
{
	struct hid_usage *usage;
1569
	bool update_needed = false;
1570
	bool get_report_completed = false;
1571 1572
	int i, j;

1573 1574
	if (report->maxfield == 0)
		return false;
1575

1576 1577 1578 1579 1580 1581 1582 1583
	for (i = 0; i < report->maxfield; i++) {
		__s32 value = use_logical_max ?
			      report->field[i]->logical_maximum :
			      report->field[i]->logical_minimum;

		/* There is no good reason for a Resolution
		 * Multiplier to have a count other than 1.
		 * Ignore that case.
1584
		 */
1585 1586
		if (report->field[i]->report_count != 1)
			continue;
1587

1588 1589
		for (j = 0; j < report->field[i]->maxusage; j++) {
			usage = &report->field[i]->usage[j];
1590

1591
			if (usage->hid != HID_GD_RESOLUTION_MULTIPLIER)
1592 1593
				continue;

1594 1595 1596 1597 1598 1599 1600 1601 1602 1603 1604 1605 1606 1607 1608 1609 1610 1611 1612
			/*
			 * If we have more than one feature within this
			 * report we need to fill in the bits from the
			 * others before we can overwrite the ones for the
			 * Resolution Multiplier.
			 *
			 * But if we're not allowed to read from the device,
			 * we just bail. Such a device should not exist
			 * anyway.
			 */
			if (!get_report_completed && report->maxfield > 1) {
				if (hid->quirks & HID_QUIRK_NO_INIT_REPORTS)
					return update_needed;

				hid_hw_request(hid, report, HID_REQ_GET_REPORT);
				hid_hw_wait(hid);
				get_report_completed = true;
			}

1613
			report->field[i]->value[j] = value;
1614 1615 1616 1617 1618 1619
			update_needed = true;
		}
	}

	return update_needed;
}
1620

1621 1622 1623 1624 1625
static void hidinput_change_resolution_multipliers(struct hid_device *hid)
{
	struct hid_report_enum *rep_enum;
	struct hid_report *rep;
	int ret;
1626

1627 1628 1629 1630 1631 1632 1633 1634 1635 1636 1637
	rep_enum = &hid->report_enum[HID_FEATURE_REPORT];
	list_for_each_entry(rep, &rep_enum->report_list, list) {
		bool update_needed = __hidinput_change_resolution_multipliers(hid,
								     rep, true);

		if (update_needed) {
			ret = __hid_request(hid, rep, HID_REQ_SET_REPORT);
			if (ret) {
				__hidinput_change_resolution_multipliers(hid,
								    rep, false);
				return;
1638 1639 1640 1641 1642 1643 1644 1645
			}
		}
	}

	/* refresh our structs */
	hid_setup_resolution_multiplier(hid);
}

1646 1647 1648 1649 1650
static void report_features(struct hid_device *hid)
{
	struct hid_driver *drv = hid->driver;
	struct hid_report_enum *rep_enum;
	struct hid_report *rep;
1651
	struct hid_usage *usage;
1652 1653 1654 1655
	int i, j;

	rep_enum = &hid->report_enum[HID_FEATURE_REPORT];
	list_for_each_entry(rep, &rep_enum->report_list, list)
1656 1657 1658 1659 1660
		for (i = 0; i < rep->maxfield; i++) {
			/* Ignore if report count is out of bounds. */
			if (rep->field[i]->report_count < 1)
				continue;

1661
			for (j = 0; j < rep->field[i]->maxusage; j++) {
1662 1663
				usage = &rep->field[i]->usage[j];

1664
				/* Verify if Battery Strength feature is available */
1665 1666 1667
				if (usage->hid == HID_DC_BATTERYSTRENGTH)
					hidinput_setup_battery(hid, HID_FEATURE_REPORT,
							       rep->field[i]);
1668 1669

				if (drv->feature_mapping)
1670
					drv->feature_mapping(hid, rep->field[i], usage);
1671
			}
1672
		}
1673 1674
}

1675 1676
static struct hid_input *hidinput_allocate(struct hid_device *hid,
					   unsigned int application)
1677 1678 1679
{
	struct hid_input *hidinput = kzalloc(sizeof(*hidinput), GFP_KERNEL);
	struct input_dev *input_dev = input_allocate_device();
1680
	const char *suffix = NULL;
1681
	size_t suffix_len, name_len;
1682 1683 1684 1685 1686 1687 1688 1689 1690 1691 1692 1693 1694 1695 1696 1697 1698 1699 1700 1701 1702 1703 1704 1705 1706 1707 1708 1709 1710 1711 1712 1713 1714 1715

	if (!hidinput || !input_dev)
		goto fail;

	if ((hid->quirks & HID_QUIRK_INPUT_PER_APP) &&
	    hid->maxapplication > 1) {
		switch (application) {
		case HID_GD_KEYBOARD:
			suffix = "Keyboard";
			break;
		case HID_GD_KEYPAD:
			suffix = "Keypad";
			break;
		case HID_GD_MOUSE:
			suffix = "Mouse";
			break;
		case HID_DG_STYLUS:
			suffix = "Pen";
			break;
		case HID_DG_TOUCHSCREEN:
			suffix = "Touchscreen";
			break;
		case HID_DG_TOUCHPAD:
			suffix = "Touchpad";
			break;
		case HID_GD_SYSTEM_CONTROL:
			suffix = "System Control";
			break;
		case HID_CP_CONSUMER_CONTROL:
			suffix = "Consumer Control";
			break;
		case HID_GD_WIRELESS_RADIO_CTLS:
			suffix = "Wireless Radio Control";
			break;
1716 1717 1718
		case HID_GD_SYSTEM_MULTIAXIS:
			suffix = "System Multi Axis";
			break;
1719 1720 1721 1722 1723 1724
		default:
			break;
		}
	}

	if (suffix) {
1725 1726 1727 1728 1729 1730 1731 1732 1733
		name_len = strlen(hid->name);
		suffix_len = strlen(suffix);
		if ((name_len < suffix_len) ||
		    strcmp(hid->name + name_len - suffix_len, suffix)) {
			hidinput->name = kasprintf(GFP_KERNEL, "%s %s",
						   hid->name, suffix);
			if (!hidinput->name)
				goto fail;
		}
1734 1735 1736
	}

	input_set_drvdata(input_dev, hid);
1737
	input_dev->event = hidinput_input_event;
1738 1739 1740 1741 1742
	input_dev->open = hidinput_open;
	input_dev->close = hidinput_close;
	input_dev->setkeycode = hidinput_setkeycode;
	input_dev->getkeycode = hidinput_getkeycode;

1743
	input_dev->name = hidinput->name ? hidinput->name : hid->name;
1744 1745 1746 1747 1748 1749
	input_dev->phys = hid->phys;
	input_dev->uniq = hid->uniq;
	input_dev->id.bustype = hid->bus;
	input_dev->id.vendor  = hid->vendor;
	input_dev->id.product = hid->product;
	input_dev->id.version = hid->version;
1750
	input_dev->dev.parent = &hid->dev;
1751

1752
	hidinput->input = input_dev;
1753
	hidinput->application = application;
1754 1755
	list_add_tail(&hidinput->list, &hid->inputs);

1756 1757
	INIT_LIST_HEAD(&hidinput->reports);

1758
	return hidinput;
1759 1760 1761 1762 1763 1764

fail:
	kfree(hidinput);
	input_free_device(input_dev);
	hid_err(hid, "Out of memory during hid input probe\n");
	return NULL;
1765 1766
}

1767 1768 1769 1770 1771 1772 1773 1774 1775 1776 1777 1778 1779 1780 1781 1782 1783 1784 1785 1786 1787 1788 1789 1790 1791 1792 1793 1794 1795 1796 1797 1798 1799 1800 1801 1802 1803 1804 1805 1806 1807 1808 1809
static bool hidinput_has_been_populated(struct hid_input *hidinput)
{
	int i;
	unsigned long r = 0;

	for (i = 0; i < BITS_TO_LONGS(EV_CNT); i++)
		r |= hidinput->input->evbit[i];

	for (i = 0; i < BITS_TO_LONGS(KEY_CNT); i++)
		r |= hidinput->input->keybit[i];

	for (i = 0; i < BITS_TO_LONGS(REL_CNT); i++)
		r |= hidinput->input->relbit[i];

	for (i = 0; i < BITS_TO_LONGS(ABS_CNT); i++)
		r |= hidinput->input->absbit[i];

	for (i = 0; i < BITS_TO_LONGS(MSC_CNT); i++)
		r |= hidinput->input->mscbit[i];

	for (i = 0; i < BITS_TO_LONGS(LED_CNT); i++)
		r |= hidinput->input->ledbit[i];

	for (i = 0; i < BITS_TO_LONGS(SND_CNT); i++)
		r |= hidinput->input->sndbit[i];

	for (i = 0; i < BITS_TO_LONGS(FF_CNT); i++)
		r |= hidinput->input->ffbit[i];

	for (i = 0; i < BITS_TO_LONGS(SW_CNT); i++)
		r |= hidinput->input->swbit[i];

	return !!r;
}

static void hidinput_cleanup_hidinput(struct hid_device *hid,
		struct hid_input *hidinput)
{
	struct hid_report *report;
	int i, k;

	list_del(&hidinput->list);
	input_free_device(hidinput->input);
1810
	kfree(hidinput->name);
1811 1812 1813 1814 1815 1816 1817 1818 1819 1820 1821 1822 1823 1824 1825 1826 1827 1828

	for (k = HID_INPUT_REPORT; k <= HID_OUTPUT_REPORT; k++) {
		if (k == HID_OUTPUT_REPORT &&
			hid->quirks & HID_QUIRK_SKIP_OUTPUT_REPORTS)
			continue;

		list_for_each_entry(report, &hid->report_enum[k].report_list,
				    list) {

			for (i = 0; i < report->maxfield; i++)
				if (report->field[i]->hidinput == hidinput)
					report->field[i]->hidinput = NULL;
		}
	}

	kfree(hidinput);
}

1829 1830 1831 1832 1833 1834 1835 1836 1837 1838 1839 1840 1841 1842
static struct hid_input *hidinput_match(struct hid_report *report)
{
	struct hid_device *hid = report->device;
	struct hid_input *hidinput;

	list_for_each_entry(hidinput, &hid->inputs, list) {
		if (hidinput->report &&
		    hidinput->report->id == report->id)
			return hidinput;
	}

	return NULL;
}

1843 1844 1845 1846 1847 1848
static struct hid_input *hidinput_match_application(struct hid_report *report)
{
	struct hid_device *hid = report->device;
	struct hid_input *hidinput;

	list_for_each_entry(hidinput, &hid->inputs, list) {
1849
		if (hidinput->application == report->application)
1850 1851 1852 1853 1854 1855
			return hidinput;
	}

	return NULL;
}

1856 1857 1858 1859 1860 1861 1862 1863 1864 1865 1866
static inline void hidinput_configure_usages(struct hid_input *hidinput,
					     struct hid_report *report)
{
	int i, j;

	for (i = 0; i < report->maxfield; i++)
		for (j = 0; j < report->field[i]->maxusage; j++)
			hidinput_configure_usage(hidinput, report->field[i],
						 report->field[i]->usage + j);
}

1867 1868 1869 1870 1871 1872
/*
 * Register the input device; print a message.
 * Configure the input layer interface
 * Read all reports and initialize the absolute field values.
 */

J
Jiri Slaby 已提交
1873
int hidinput_connect(struct hid_device *hid, unsigned int force)
1874
{
1875
	struct hid_driver *drv = hid->driver;
1876
	struct hid_report *report;
1877
	struct hid_input *next, *hidinput = NULL;
1878
	unsigned int application;
1879
	int i, k;
1880 1881

	INIT_LIST_HEAD(&hid->inputs);
1882
	INIT_WORK(&hid->led_work, hidinput_led_worker);
1883

1884 1885
	hid->status &= ~HID_STAT_DUP_DETECTED;

J
Jiri Slaby 已提交
1886 1887 1888 1889 1890 1891 1892 1893
	if (!force) {
		for (i = 0; i < hid->maxcollection; i++) {
			struct hid_collection *col = &hid->collection[i];
			if (col->type == HID_COLLECTION_APPLICATION ||
					col->type == HID_COLLECTION_PHYSICAL)
				if (IS_INPUT_APPLICATION(col->usage))
					break;
		}
1894

J
Jiri Slaby 已提交
1895 1896 1897
		if (i == hid->maxcollection)
			return -1;
	}
1898

1899 1900 1901
	report_features(hid);

	for (k = HID_INPUT_REPORT; k <= HID_OUTPUT_REPORT; k++) {
1902 1903 1904
		if (k == HID_OUTPUT_REPORT &&
			hid->quirks & HID_QUIRK_SKIP_OUTPUT_REPORTS)
			continue;
1905

1906 1907 1908 1909 1910
		list_for_each_entry(report, &hid->report_enum[k].report_list, list) {

			if (!report->maxfield)
				continue;

1911 1912
			application = report->application;

1913 1914 1915 1916 1917 1918
			/*
			 * Find the previous hidinput report attached
			 * to this report id.
			 */
			if (hid->quirks & HID_QUIRK_MULTI_INPUT)
				hidinput = hidinput_match(report);
1919 1920 1921
			else if (hid->maxapplication > 1 &&
				 (hid->quirks & HID_QUIRK_INPUT_PER_APP))
				hidinput = hidinput_match_application(report);
1922

1923
			if (!hidinput) {
1924
				hidinput = hidinput_allocate(hid, application);
1925
				if (!hidinput)
1926
					goto out_unwind;
1927 1928
			}

1929
			hidinput_configure_usages(hidinput, report);
1930

1931
			if (hid->quirks & HID_QUIRK_MULTI_INPUT)
1932
				hidinput->report = report;
1933 1934 1935

			list_add_tail(&report->hidinput_list,
				      &hidinput->reports);
1936
		}
1937
	}
1938

1939 1940
	hidinput_change_resolution_multipliers(hid);

1941
	list_for_each_entry_safe(hidinput, next, &hid->inputs, list) {
1942 1943 1944 1945 1946
		if (drv->input_configured &&
		    drv->input_configured(hid, hidinput))
			goto out_unwind;

		if (!hidinput_has_been_populated(hidinput)) {
1947 1948 1949 1950 1951 1952 1953 1954
			/* no need to register an input device not populated */
			hidinput_cleanup_hidinput(hid, hidinput);
			continue;
		}

		if (input_register_device(hidinput->input))
			goto out_unwind;
		hidinput->registered = true;
1955 1956 1957 1958 1959 1960 1961
	}

	if (list_empty(&hid->inputs)) {
		hid_err(hid, "No inputs registered, leaving\n");
		goto out_unwind;
	}

1962 1963 1964 1965
	if (hid->status & HID_STAT_DUP_DETECTED)
		hid_dbg(hid,
			"Some usages could not be mapped, please use HID_QUIRK_INCREMENT_USAGE_ON_DUPLICATE if this is legitimate.\n");

1966
	return 0;
1967 1968 1969 1970 1971 1972

out_unwind:
	/* unwind the ones we already registered */
	hidinput_disconnect(hid);

	return -1;
1973
}
J
Jiri Kosina 已提交
1974
EXPORT_SYMBOL_GPL(hidinput_connect);
1975 1976 1977 1978 1979

void hidinput_disconnect(struct hid_device *hid)
{
	struct hid_input *hidinput, *next;

1980 1981
	hidinput_cleanup_battery(hid);

1982 1983
	list_for_each_entry_safe(hidinput, next, &hid->inputs, list) {
		list_del(&hidinput->list);
1984 1985 1986 1987
		if (hidinput->registered)
			input_unregister_device(hidinput->input);
		else
			input_free_device(hidinput->input);
1988
		kfree(hidinput->name);
1989 1990
		kfree(hidinput);
	}
1991 1992 1993 1994 1995 1996

	/* led_work is spawned by input_dev callbacks, but doesn't access the
	 * parent input_dev at all. Once all input devices are removed, we
	 * know that led_work will never get restarted, so we can cancel it
	 * synchronously and are safe. */
	cancel_work_sync(&hid->led_work);
1997
}
J
Jiri Kosina 已提交
1998
EXPORT_SYMBOL_GPL(hidinput_disconnect);