hid-input.c 43.8 KB
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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
 */

/*
 * 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.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 *
 * 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,
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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,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:
	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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static const struct hid_device_id hid_battery_quirks[] = {
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	{ HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE,
			USB_DEVICE_ID_APPLE_ALU_WIRELESS_2009_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_2011_ANSI),
	  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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	{}
};

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_get_battery_property(struct power_supply *psy,
					 enum power_supply_property prop,
					 union power_supply_propval *val)
{
	struct hid_device *dev = container_of(psy, struct hid_device, battery);
	int ret = 0;
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	__u8 *buf;
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	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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		buf = kmalloc(2 * sizeof(__u8), GFP_KERNEL);
		if (!buf) {
			ret = -ENOMEM;
			break;
		}
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		ret = hid_hw_raw_request(dev, dev->battery_report_id, buf, 2,
					 dev->battery_report_type,
					 HID_REQ_GET_REPORT);
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		if (ret != 2) {
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			ret = -ENODATA;
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			kfree(buf);
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			break;
		}
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		ret = 0;
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		if (dev->battery_min < dev->battery_max &&
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		    buf[1] >= dev->battery_min &&
		    buf[1] <= dev->battery_max)
			val->intval = (100 * (buf[1] - dev->battery_min)) /
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				(dev->battery_max - dev->battery_min);
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		kfree(buf);
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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:
		val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
		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 bool hidinput_setup_battery(struct hid_device *dev, unsigned report_type, struct hid_field *field)
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{
	struct power_supply *battery = &dev->battery;
	int ret;
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	unsigned quirks;
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	s32 min, max;

	if (field->usage->hid != HID_DC_BATTERYSTRENGTH)
		return false;	/* no match */
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	if (battery->name != NULL)
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		goto out;	/* already initialized? */
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	battery->name = kasprintf(GFP_KERNEL, "hid-%s-battery", dev->uniq);
	if (battery->name == NULL)
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		goto out;
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	battery->type = POWER_SUPPLY_TYPE_BATTERY;
	battery->properties = hidinput_battery_props;
	battery->num_properties = ARRAY_SIZE(hidinput_battery_props);
	battery->use_for_apm = 0;
	battery->get_property = hidinput_get_battery_property;

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	quirks = find_battery_quirk(dev);

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

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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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	ret = power_supply_register(&dev->dev, battery);
	if (ret != 0) {
		hid_warn(dev, "can't register power supply: %d\n", ret);
		kfree(battery->name);
		battery->name = NULL;
	}
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	power_supply_powers(battery, &dev->dev);

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out:
	return true;
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}

static void hidinput_cleanup_battery(struct hid_device *dev)
{
	if (!dev->battery.name)
		return;

	power_supply_unregister(&dev->battery);
	kfree(dev->battery.name);
	dev->battery.name = NULL;
}
#else  /* !CONFIG_HID_BATTERY_STRENGTH */
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static bool hidinput_setup_battery(struct hid_device *dev, unsigned report_type,
				   struct hid_field *field)
461
{
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	return false;
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}

static void hidinput_cleanup_battery(struct hid_device *dev)
{
}
#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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	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;
	}

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	switch (usage->hid & HID_USAGE_PAGE) {
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	case HID_UP_UNDEFINED:
		goto ignore;
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	case HID_UP_KEYBOARD:
		set_bit(EV_REP, input->evbit);
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		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);
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		break;
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	case HID_UP_BUTTON:
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		code = ((usage->hid - 1) & HID_USAGE);
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		switch (field->application) {
		case HID_GD_MOUSE:
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		case HID_GD_POINTER:  code += BTN_MOUSE; break;
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		case HID_GD_JOYSTICK:
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				if (code <= 0xf)
					code += BTN_JOYSTICK;
				else
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					code += BTN_TRIGGER_HAPPY - 0x10;
				break;
		case HID_GD_GAMEPAD:
				if (code <= 0xf)
					code += BTN_GAMEPAD;
				else
					code += BTN_TRIGGER_HAPPY - 0x10;
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				break;
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		default:
			switch (field->physical) {
			case HID_GD_MOUSE:
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			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;
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			}
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		}
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		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;
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			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;
578 579
			}
			break;
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		}
581

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582
		if ((usage->hid & 0xf0) == 0x90) {	/* D-pad */
583
			switch (usage->hid) {
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			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;
589
			}
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			if (field->dpad) {
				map_abs(field->dpad);
				goto ignore;
593
			}
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594
			map_abs(ABS_HAT0X);
595
			break;
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		}
597

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		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:
602 603 604 605 606 607
			if (field->flags & HID_MAIN_ITEM_RELATIVE)
				map_rel(usage->hid & 0xf);
			else
				map_abs_clear(usage->hid & 0xf);
			break;

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		case HID_GD_SLIDER: case HID_GD_DIAL: case HID_GD_WHEEL:
			if (field->flags & HID_MAIN_ITEM_RELATIVE)
				map_rel(usage->hid & 0xf);
			else
				map_abs(usage->hid & 0xf);
			break;
614

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		case HID_GD_HATSWITCH:
			usage->hat_min = field->logical_minimum;
			usage->hat_max = field->logical_maximum;
			map_abs(ABS_HAT0X);
			break;
620

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		case HID_GD_START:	map_key_clear(BTN_START);	break;
		case HID_GD_SELECT:	map_key_clear(BTN_SELECT);	break;
623

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		default: goto unknown;
		}
626

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		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:
		switch (usage->hid & 0xff) {
649 650 651
		case 0x00: /* Undefined */
			goto ignore;

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		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);
657
			}
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658
			map_abs_clear(ABS_PRESSURE);
659 660
			break;

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		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;
666 667 668
			}
			break;

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		case 0x3c: /* Invert */
			map_key_clear(BTN_TOOL_RUBBER);
671 672
			break;

673 674 675 676 677 678 679 680
		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;
687

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		case 0x44: /* BarrelSwitch */
			map_key_clear(BTN_STYLUS);
			break;
691

692
		case 0x46: /* TabletPick */
693
		case 0x5a: /* SecondaryBarrelSwitch */
694 695 696
			map_key_clear(BTN_STYLUS2);
			break;

697
		case 0x5b: /* TransducerSerialNumber */
698 699 700 701
			usage->type = EV_MSC;
			usage->code = MSC_SERIAL;
			bit = input->mscbit;
			max = MSC_MAX;
702 703
			break;

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		default:  goto unknown;
		}
		break;

708
	case HID_UP_CONSUMER:	/* USB HUT v1.12, pages 75-84 */
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709 710
		switch (usage->hid & HID_USAGE) {
		case 0x000: goto ignore;
711 712 713
		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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714
		case 0x034: map_key_clear(KEY_SLEEP);		break;
715
		case 0x035: map_key_clear(KEY_KBDILLUMTOGGLE);	break;
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		case 0x036: map_key_clear(BTN_MISC);		break;

718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737
		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;
		case 0x06d: map_key_clear(KEY_ZOOM);		break;

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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;

745
		case 0x082: map_key_clear(KEY_VIDEO_NEXT);	break;
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746
		case 0x083: map_key_clear(KEY_LAST);		break;
747
		case 0x084: map_key_clear(KEY_ENTER);		break;
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Jiri Slaby 已提交
748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780
		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;
781 782
		case 0x0b9: map_key_clear(KEY_SHUFFLE);		break;
		case 0x0bf: map_key_clear(KEY_SLOW);		break;
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783 784

		case 0x0cd: map_key_clear(KEY_PLAYPAUSE);	break;
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		case 0x0cf: map_key_clear(KEY_VOICECOMMAND);	break;
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786 787 788 789 790
		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;
791
		case 0x0f5: map_key_clear(KEY_SLOW);		break;
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Jiri Slaby 已提交
792

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793
		case 0x181: map_key_clear(KEY_BUTTONCONFIG);	break;
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Jiri Slaby 已提交
794 795 796 797 798 799 800 801 802 803 804 805 806
		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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Jiri Slaby 已提交
809 810
		case 0x191: map_key_clear(KEY_FINANCE);		break;
		case 0x192: map_key_clear(KEY_CALC);		break;
811
		case 0x193: map_key_clear(KEY_PLAYER);		break;
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Jiri Slaby 已提交
812 813
		case 0x194: map_key_clear(KEY_FILE);		break;
		case 0x196: map_key_clear(KEY_WWW);		break;
814
		case 0x199: map_key_clear(KEY_CHAT);		break;
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Jiri Slaby 已提交
815 816
		case 0x19c: map_key_clear(KEY_LOGOFF);		break;
		case 0x19e: map_key_clear(KEY_COFFEE);		break;
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817 818
		case 0x19f: map_key_clear(KEY_CONTROLPANEL);		break;
		case 0x1a2: map_key_clear(KEY_APPSELECT);		break;
819 820
		case 0x1a3: map_key_clear(KEY_NEXT);		break;
		case 0x1a4: map_key_clear(KEY_PREVIOUS);	break;
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821 822 823
		case 0x1a6: map_key_clear(KEY_HELP);		break;
		case 0x1a7: map_key_clear(KEY_DOCUMENTS);	break;
		case 0x1ab: map_key_clear(KEY_SPELLCHECK);	break;
824
		case 0x1ae: map_key_clear(KEY_KEYBOARD);	break;
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		case 0x1b1: map_key_clear(KEY_SCREENSAVER);		break;
826
		case 0x1b4: map_key_clear(KEY_FILE);		break;
827 828 829
		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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Jiri Slaby 已提交
830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857
		case 0x1bc: map_key_clear(KEY_MESSENGER);	break;
		case 0x1bd: map_key_clear(KEY_INFO);		break;
		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;
		case 0x233: map_key_clear(KEY_SCROLLUP);	break;
		case 0x234: map_key_clear(KEY_SCROLLDOWN);	break;
		case 0x238: map_rel(REL_HWHEEL);		break;
858
		case 0x23d: map_key_clear(KEY_EDIT);		break;
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859
		case 0x25f: map_key_clear(KEY_CANCEL);		break;
860 861
		case 0x269: map_key_clear(KEY_INSERT);		break;
		case 0x26a: map_key_clear(KEY_DELETE);		break;
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Jiri Slaby 已提交
862 863 864 865 866 867
		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;

868 869 870 871 872 873 874
		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;

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		default:    goto ignore;
		}
		break;

879
	case HID_UP_GENDEVCTRLS:
880
		if (hidinput_setup_battery(device, HID_INPUT_REPORT, field))
881
			goto ignore;
882
		else
883 884 885
			goto unknown;
		break;

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Jiri Slaby 已提交
886 887 888 889 890 891 892 893 894 895 896 897 898 899 900
	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;
901 902 903 904 905 906 907 908 909
		default:    goto ignore;
		}
		break;

	case HID_UP_HPVENDOR2:
		set_bit(EV_REP, input->evbit);
		switch (usage->hid & HID_USAGE) {
		case 0x003: map_key_clear(KEY_BRIGHTNESSDOWN);	break;
		case 0x004: map_key_clear(KEY_BRIGHTNESSUP);	break;
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		default:    goto ignore;
		}
		break;
913

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914 915
	case HID_UP_MSVENDOR:
		goto ignore;
916

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917 918 919
	case HID_UP_CUSTOM: /* Reported on Logitech and Apple USB keyboards */
		set_bit(EV_REP, input->evbit);
		goto ignore;
920

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921 922
	case HID_UP_LOGIVENDOR:
		goto ignore;
923

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	case HID_UP_PID:
		switch (usage->hid & HID_USAGE) {
		case 0xa4: map_key_clear(BTN_DEAD);	break;
		default: goto ignore;
		}
		break;
930

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Jiri Slaby 已提交
931 932 933 934 935
	default:
	unknown:
		if (field->report_size == 1) {
			if (field->report->type == HID_OUTPUT_REPORT) {
				map_led(LED_MISC);
936 937
				break;
			}
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938
			map_key(BTN_MISC);
939
			break;
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940 941 942 943 944 945 946
		}
		if (field->flags & HID_MAIN_ITEM_RELATIVE) {
			map_rel(REL_MISC);
			break;
		}
		map_abs(ABS_MISC);
		break;
947 948
	}

949
mapped:
J
Jiri Slaby 已提交
950 951 952 953
	if (device->driver->input_mapped && device->driver->input_mapped(device,
				hidinput, field, usage, &bit, &max) < 0)
		goto ignore;

954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976
	set_bit(usage->type, input->evbit);

	while (usage->code <= max && test_and_set_bit(usage->code, bit))
		usage->code = find_next_zero_bit(bit, max + 1, usage->code);

	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);

977 978 979
		input_abs_set_res(input, usage->code,
				  hidinput_calc_abs_res(field, usage->code));

980 981 982
		/* 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);
983 984 985 986 987 988 989 990 991 992 993 994 995
	}

	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;
	}

996 997 998 999 1000 1001 1002 1003 1004 1005
	/* 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);
	}

1006 1007 1008 1009 1010
	if (usage->type == EV_KEY) {
		set_bit(EV_MSC, input->evbit);
		set_bit(MSC_SCAN, input->mscbit);
	}

1011 1012
ignore:
	return;
1013

1014 1015 1016 1017 1018
}

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
1019
	unsigned *quirks = &hid->quirks;
1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034

	if (!field->hidinput)
		return;

	input = field->hidinput->input;

	if (!usage->type)
		return;

	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);
1035 1036 1037
		input_event(input, usage->type, usage->code + 1, hid_hat_to_axis[hat_dir].y);
		return;
	}
1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060

	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 */
1061
		dbg_hid("Maximum Effects - %d\n",value);
1062 1063 1064 1065
		return;
	}

	if (usage->hid == (HID_UP_PID | 0x7fUL)) {
1066
		dbg_hid("PID Pool Report\n");
1067 1068 1069 1070 1071 1072
		return;
	}

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

1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087
	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;
	}

1088 1089
	/*
	 * Ignore out-of-range values as per HID specification,
1090 1091 1092 1093 1094
	 * section 5.10 and 6.2.25.
	 *
	 * 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.
1095 1096
	 */
	if ((field->flags & HID_MAIN_ITEM_VARIABLE) &&
1097
	    (field->logical_minimum < field->logical_maximum) &&
1098 1099
	    (value < field->logical_minimum ||
	     value > field->logical_maximum)) {
1100 1101 1102 1103
		dbg_hid("Ignoring out-of-range value %x\n", value);
		return;
	}

1104 1105 1106
	/* report the usage code as scancode if the key status has changed */
	if (usage->type == EV_KEY && !!test_bit(usage->code, input->key) != value)
		input_event(input, EV_MSC, MSC_SCAN, usage->hid);
1107

1108 1109 1110 1111 1112 1113 1114 1115 1116 1117
	input_event(input, usage->type, usage->code, value);

	if ((field->flags & HID_MAIN_ITEM_RELATIVE) && (usage->type == EV_KEY))
		input_event(input, usage->type, usage->code, 0);
}

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

1118 1119 1120
	if (hid->quirks & HID_QUIRK_NO_INPUT_SYNC)
		return;

1121 1122 1123
	list_for_each_entry(hidinput, &hid->inputs, list)
		input_sync(hidinput->input);
}
J
Jiri Kosina 已提交
1124
EXPORT_SYMBOL_GPL(hidinput_report_event);
1125

J
Jiri Kosina 已提交
1126
int hidinput_find_field(struct hid_device *hid, unsigned int type, unsigned int code, struct hid_field **field)
1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140
{
	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
1141
EXPORT_SYMBOL_GPL(hidinput_find_field);
1142

1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184
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);

1185 1186 1187 1188 1189 1190
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;
1191
	int len, ret;
1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218
	__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 */
	len = ((report->size - 1) >> 3) + 1 + (report->id > 0);
B
Benjamin Tissoires 已提交
1219
	buf = hid_alloc_report_buf(report, GFP_KERNEL);
1220 1221 1222 1223 1224
	if (!buf)
		return;

	hid_output_report(report, buf);
	/* synchronous output report */
1225 1226 1227 1228
	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);
1229 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
	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;
}

1256 1257
static int hidinput_open(struct input_dev *dev)
{
1258 1259
	struct hid_device *hid = input_get_drvdata(dev);

1260
	return hid_hw_open(hid);
1261 1262 1263 1264
}

static void hidinput_close(struct input_dev *dev)
{
1265 1266
	struct hid_device *hid = input_get_drvdata(dev);

1267
	hid_hw_close(hid);
1268 1269
}

1270 1271 1272 1273 1274 1275 1276 1277 1278
static void report_features(struct hid_device *hid)
{
	struct hid_driver *drv = hid->driver;
	struct hid_report_enum *rep_enum;
	struct hid_report *rep;
	int i, j;

	rep_enum = &hid->report_enum[HID_FEATURE_REPORT];
	list_for_each_entry(rep, &rep_enum->report_list, list)
1279 1280 1281 1282 1283
		for (i = 0; i < rep->maxfield; i++) {
			/* Ignore if report count is out of bounds. */
			if (rep->field[i]->report_count < 1)
				continue;

1284 1285
			for (j = 0; j < rep->field[i]->maxusage; j++) {
				/* Verify if Battery Strength feature is available */
1286
				hidinput_setup_battery(hid, HID_FEATURE_REPORT, rep->field[i]);
1287 1288 1289 1290 1291

				if (drv->feature_mapping)
					drv->feature_mapping(hid, rep->field[i],
							     rep->field[i]->usage + j);
			}
1292
		}
1293 1294
}

1295 1296 1297 1298 1299 1300 1301 1302 1303 1304 1305 1306
static struct hid_input *hidinput_allocate(struct hid_device *hid)
{
	struct hid_input *hidinput = kzalloc(sizeof(*hidinput), GFP_KERNEL);
	struct input_dev *input_dev = input_allocate_device();
	if (!hidinput || !input_dev) {
		kfree(hidinput);
		input_free_device(input_dev);
		hid_err(hid, "Out of memory during hid input probe\n");
		return NULL;
	}

	input_set_drvdata(input_dev, hid);
1307
	input_dev->event = hidinput_input_event;
1308 1309 1310 1311 1312 1313 1314 1315 1316 1317 1318 1319
	input_dev->open = hidinput_open;
	input_dev->close = hidinput_close;
	input_dev->setkeycode = hidinput_setkeycode;
	input_dev->getkeycode = hidinput_getkeycode;

	input_dev->name = hid->name;
	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;
1320
	input_dev->dev.parent = &hid->dev;
1321 1322 1323 1324 1325 1326
	hidinput->input = input_dev;
	list_add_tail(&hidinput->list, &hid->inputs);

	return hidinput;
}

1327 1328 1329 1330 1331 1332 1333 1334 1335 1336 1337 1338 1339 1340 1341 1342 1343 1344 1345 1346 1347 1348 1349 1350 1351 1352 1353 1354 1355 1356 1357 1358 1359 1360 1361 1362 1363 1364 1365 1366 1367 1368 1369 1370 1371 1372 1373 1374 1375 1376 1377 1378 1379 1380 1381 1382 1383 1384 1385 1386 1387
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);

	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);
}

1388 1389 1390 1391 1392 1393
/*
 * 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
1394
int hidinput_connect(struct hid_device *hid, unsigned int force)
1395
{
1396
	struct hid_driver *drv = hid->driver;
1397 1398 1399 1400 1401
	struct hid_report *report;
	struct hid_input *hidinput = NULL;
	int i, j, k;

	INIT_LIST_HEAD(&hid->inputs);
1402
	INIT_WORK(&hid->led_work, hidinput_led_worker);
1403

J
Jiri Slaby 已提交
1404 1405 1406 1407 1408 1409 1410 1411
	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;
		}
1412

J
Jiri Slaby 已提交
1413 1414 1415
		if (i == hid->maxcollection)
			return -1;
	}
1416

1417 1418 1419
	report_features(hid);

	for (k = HID_INPUT_REPORT; k <= HID_OUTPUT_REPORT; k++) {
1420 1421 1422
		if (k == HID_OUTPUT_REPORT &&
			hid->quirks & HID_QUIRK_SKIP_OUTPUT_REPORTS)
			continue;
1423

1424 1425 1426 1427 1428 1429
		list_for_each_entry(report, &hid->report_enum[k].report_list, list) {

			if (!report->maxfield)
				continue;

			if (!hidinput) {
1430 1431
				hidinput = hidinput_allocate(hid);
				if (!hidinput)
1432
					goto out_unwind;
1433 1434 1435 1436 1437 1438 1439
			}

			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);

1440 1441 1442 1443
			if ((hid->quirks & HID_QUIRK_NO_EMPTY_INPUT) &&
			    !hidinput_has_been_populated(hidinput))
				continue;

1444 1445 1446 1447 1448 1449 1450
			if (hid->quirks & HID_QUIRK_MULTI_INPUT) {
				/* This will leave hidinput NULL, so that it
				 * allocates another one if we have more inputs on
				 * the same interface. Some devices (e.g. Happ's
				 * UGCI) cram a lot of unrelated inputs into the
				 * same interface. */
				hidinput->report = report;
1451 1452
				if (drv->input_configured)
					drv->input_configured(hid, hidinput);
1453 1454
				if (input_register_device(hidinput->input))
					goto out_cleanup;
1455 1456 1457
				hidinput = NULL;
			}
		}
1458
	}
1459

1460 1461 1462 1463 1464 1465 1466 1467 1468 1469 1470 1471
	if (hidinput && (hid->quirks & HID_QUIRK_NO_EMPTY_INPUT) &&
	    !hidinput_has_been_populated(hidinput)) {
		/* no need to register an input device not populated */
		hidinput_cleanup_hidinput(hid, hidinput);
		hidinput = NULL;
	}

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

1472 1473 1474 1475 1476 1477
	if (hidinput) {
		if (drv->input_configured)
			drv->input_configured(hid, hidinput);
		if (input_register_device(hidinput->input))
			goto out_cleanup;
	}
1478 1479

	return 0;
1480 1481

out_cleanup:
1482
	list_del(&hidinput->list);
1483 1484 1485 1486 1487 1488 1489
	input_free_device(hidinput->input);
	kfree(hidinput);
out_unwind:
	/* unwind the ones we already registered */
	hidinput_disconnect(hid);

	return -1;
1490
}
J
Jiri Kosina 已提交
1491
EXPORT_SYMBOL_GPL(hidinput_connect);
1492 1493 1494 1495 1496

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

1497 1498
	hidinput_cleanup_battery(hid);

1499 1500 1501 1502 1503
	list_for_each_entry_safe(hidinput, next, &hid->inputs, list) {
		list_del(&hidinput->list);
		input_unregister_device(hidinput->input);
		kfree(hidinput);
	}
1504 1505 1506 1507 1508 1509

	/* 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);
1510
}
J
Jiri Kosina 已提交
1511 1512
EXPORT_SYMBOL_GPL(hidinput_disconnect);