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linux/drivers/hid/hid-input.c
Dmitry Torokhov 0152b29c89 HID: input: throttle battery uevents 
The power_supply subsystem tends to emit uevent every time
power_supply_changed() is called, so we should call this API only when battery
strength reported by the device is actually different from the previous
readings, otherwise we'll drown the system in uevents.

Fixes: 581c448476 ("HID: input: map digitizer battery usage")
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
2017-08-15 10:56:03 +02:00

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/*
* Copyright (c) 2000-2001 Vojtech Pavlik
* Copyright (c) 2006-2010 Jiri Kosina
*
* 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>
#include <linux/hid-debug.h>
#include "hid-ids.h"
#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,
122,123, 90, 91, 85,unk,unk,unk,unk,unk,unk,unk,111,unk,unk,unk,
unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,
unk,unk,unk,unk,unk,unk,179,180,unk,unk,unk,unk,unk,unk,unk,unk,
unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,
unk,unk,unk,unk,unk,unk,unk,unk,111,unk,unk,unk,unk,unk,unk,unk,
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}};
#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))
#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))
static bool match_scancode(struct hid_usage *usage,
unsigned int cur_idx, unsigned int scancode)
{
return (usage->hid & (HID_USAGE_PAGE | HID_USAGE)) == scancode;
}
static bool match_keycode(struct hid_usage *usage,
unsigned int cur_idx, unsigned int keycode)
{
/*
* We should exclude unmapped usages when doing lookup by keycode.
*/
return (usage->type == EV_KEY && usage->code == keycode);
}
static bool match_index(struct hid_usage *usage,
unsigned int cur_idx, unsigned int idx)
{
return cur_idx == idx;
}
typedef bool (*hid_usage_cmp_t)(struct hid_usage *usage,
unsigned int cur_idx, unsigned int val);
static struct hid_usage *hidinput_find_key(struct hid_device *hid,
hid_usage_cmp_t match,
unsigned int value,
unsigned int *usage_idx)
{
unsigned int i, j, k, cur_idx = 0;
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++) {
for (j = 0; j < report->field[i]->maxusage; j++) {
usage = report->field[i]->usage + j;
if (usage->type == EV_KEY || usage->type == 0) {
if (match(usage, cur_idx, value)) {
if (usage_idx)
*usage_idx = cur_idx;
return usage;
}
cur_idx++;
}
}
}
}
}
return NULL;
}
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;
}
static int hidinput_getkeycode(struct input_dev *dev,
struct input_keymap_entry *ke)
{
struct hid_device *hid = input_get_drvdata(dev);
struct hid_usage *usage;
unsigned int scancode, index;
usage = hidinput_locate_usage(hid, ke, &index);
if (usage) {
ke->keycode = usage->type == EV_KEY ?
usage->code : KEY_RESERVED;
ke->index = index;
scancode = usage->hid & (HID_USAGE_PAGE | HID_USAGE);
ke->len = sizeof(scancode);
memcpy(ke->scancode, &scancode, sizeof(scancode));
return 0;
}
return -EINVAL;
}
static int hidinput_setkeycode(struct input_dev *dev,
const struct input_keymap_entry *ke,
unsigned int *old_keycode)
{
struct hid_device *hid = input_get_drvdata(dev);
struct hid_usage *usage;
usage = hidinput_locate_usage(hid, ke, NULL);
if (usage) {
*old_keycode = usage->type == EV_KEY ?
usage->code : KEY_RESERVED;
usage->code = ke->keycode;
clear_bit(*old_keycode, dev->keybit);
set_bit(usage->code, dev->keybit);
dbg_hid("Assigned keycode %d to HID usage code %x\n",
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);
return 0;
}
return -EINVAL;
}
/**
* 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.
*
* Only exponent 1 length units are processed. Centimeters and inches are
* converted to millimeters. Degrees are converted to radians.
*/
__s32 hidinput_calc_abs_res(const struct hid_field *field, __u16 code)
{
__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
*/
switch (code) {
case ABS_X:
case ABS_Y:
case ABS_Z:
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:
if (field->unit == 0x11) { /* If centimeters */
/* Convert to millimeters */
unit_exponent += 1;
} else if (field->unit == 0x13) { /* If inches */
/* Convert to millimeters */
prev = physical_extents;
physical_extents *= 254;
if (physical_extents < prev)
return 0;
unit_exponent -= 1;
} else {
return 0;
}
break;
case ABS_RX:
case ABS_RY:
case ABS_RZ:
case ABS_WHEEL:
case ABS_TILT_X:
case ABS_TILT_Y:
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;
}
break;
default:
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 */
return DIV_ROUND_CLOSEST(logical_extents, physical_extents);
}
EXPORT_SYMBOL_GPL(hidinput_calc_abs_res);
#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,
POWER_SUPPLY_PROP_STATUS,
POWER_SUPPLY_PROP_SCOPE,
};
#define HID_BATTERY_QUIRK_PERCENT (1 << 0) /* always reports percent */
#define HID_BATTERY_QUIRK_FEATURE (1 << 1) /* ask for feature report */
#define HID_BATTERY_QUIRK_IGNORE (1 << 2) /* completely ignore the battery */
static const struct hid_device_id hid_battery_quirks[] = {
{ HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE,
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 },
{ HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE,
USB_DEVICE_ID_APPLE_ALU_WIRELESS_2011_ANSI),
HID_BATTERY_QUIRK_PERCENT | HID_BATTERY_QUIRK_FEATURE },
{ HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE,
USB_DEVICE_ID_APPLE_ALU_WIRELESS_2011_ISO),
HID_BATTERY_QUIRK_PERCENT | HID_BATTERY_QUIRK_FEATURE },
{ HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE,
USB_DEVICE_ID_APPLE_ALU_WIRELESS_ANSI),
HID_BATTERY_QUIRK_PERCENT | HID_BATTERY_QUIRK_FEATURE },
{ HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_ELECOM,
USB_DEVICE_ID_ELECOM_BM084),
HID_BATTERY_QUIRK_IGNORE },
{}
};
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;
}
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;
buf = kmalloc(2, GFP_KERNEL);
if (!buf)
return -ENOMEM;
ret = hid_hw_raw_request(dev, dev->battery_report_id, buf, 2,
dev->battery_report_type, HID_REQ_GET_REPORT);
if (ret != 2) {
kfree(buf);
return -ENODATA;
}
ret = hidinput_scale_battery_capacity(dev, buf[1]);
kfree(buf);
return ret;
}
static int hidinput_get_battery_property(struct power_supply *psy,
enum power_supply_property prop,
union power_supply_propval *val)
{
struct hid_device *dev = power_supply_get_drvdata(psy);
int value;
int ret = 0;
switch (prop) {
case POWER_SUPPLY_PROP_PRESENT:
case POWER_SUPPLY_PROP_ONLINE:
val->intval = 1;
break;
case POWER_SUPPLY_PROP_CAPACITY:
if (dev->battery_report_type == HID_FEATURE_REPORT) {
value = hidinput_query_battery_capacity(dev);
if (value < 0)
return value;
} else {
value = dev->battery_capacity;
}
val->intval = value;
break;
case POWER_SUPPLY_PROP_MODEL_NAME:
val->strval = dev->name;
break;
case POWER_SUPPLY_PROP_STATUS:
if (!dev->battery_reported &&
dev->battery_report_type == HID_FEATURE_REPORT) {
value = hidinput_query_battery_capacity(dev);
if (value < 0)
return value;
dev->battery_capacity = value;
dev->battery_reported = true;
}
if (!dev->battery_reported)
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;
break;
case POWER_SUPPLY_PROP_SCOPE:
val->intval = POWER_SUPPLY_SCOPE_DEVICE;
break;
default:
ret = -EINVAL;
break;
}
return ret;
}
static int hidinput_setup_battery(struct hid_device *dev, unsigned report_type, struct hid_field *field)
{
struct power_supply_desc *psy_desc;
struct power_supply_config psy_cfg = { .drv_data = dev, };
unsigned quirks;
s32 min, max;
int error;
if (dev->battery)
return 0; /* already initialized? */
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)
return 0;
psy_desc = kzalloc(sizeof(*psy_desc), GFP_KERNEL);
if (!psy_desc)
return -ENOMEM;
psy_desc->name = kasprintf(GFP_KERNEL, "hid-%s-battery",
strlen(dev->uniq) ?
dev->uniq : dev_name(&dev->dev));
if (!psy_desc->name) {
error = -ENOMEM;
goto err_free_mem;
}
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;
min = field->logical_minimum;
max = field->logical_maximum;
if (quirks & HID_BATTERY_QUIRK_PERCENT) {
min = 0;
max = 100;
}
if (quirks & HID_BATTERY_QUIRK_FEATURE)
report_type = HID_FEATURE_REPORT;
dev->battery_min = min;
dev->battery_max = max;
dev->battery_report_type = report_type;
dev->battery_report_id = field->report->id;
dev->battery = power_supply_register(&dev->dev, psy_desc, &psy_cfg);
if (IS_ERR(dev->battery)) {
error = PTR_ERR(dev->battery);
hid_warn(dev, "can't register power supply: %d\n", error);
goto err_free_name;
}
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;
}
static void hidinput_cleanup_battery(struct hid_device *dev)
{
const struct power_supply_desc *psy_desc;
if (!dev->battery)
return;
psy_desc = dev->battery->desc;
power_supply_unregister(dev->battery);
kfree(psy_desc->name);
kfree(psy_desc);
dev->battery = NULL;
}
static void hidinput_update_battery(struct hid_device *dev, int value)
{
int capacity;
if (!dev->battery)
return;
if (value == 0 || value < dev->battery_min || value > dev->battery_max)
return;
capacity = hidinput_scale_battery_capacity(dev, value);
if (!dev->battery_reported || capacity != dev->battery_capacity) {
dev->battery_capacity = capacity;
dev->battery_reported = true;
power_supply_changed(dev->battery);
}
}
#else /* !CONFIG_HID_BATTERY_STRENGTH */
static int hidinput_setup_battery(struct hid_device *dev, unsigned report_type,
struct hid_field *field)
{
return 0;
}
static void hidinput_cleanup_battery(struct hid_device *dev)
{
}
static void hidinput_update_battery(struct hid_device *dev, int value)
{
}
#endif /* CONFIG_HID_BATTERY_STRENGTH */
static void hidinput_configure_usage(struct hid_input *hidinput, struct hid_field *field,
struct hid_usage *usage)
{
struct input_dev *input = hidinput->input;
struct hid_device *device = input_get_drvdata(input);
int max = 0, code;
unsigned long *bit = NULL;
field->hidinput = hidinput;
if (field->flags & HID_MAIN_ITEM_CONSTANT)
goto ignore;
/* Ignore if report count is out of bounds. */
if (field->report_count < 1)
goto ignore;
/* 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;
}
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;
}
switch (usage->hid & HID_USAGE_PAGE) {
case HID_UP_UNDEFINED:
goto ignore;
case HID_UP_KEYBOARD:
set_bit(EV_REP, input->evbit);
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);
break;
case HID_UP_BUTTON:
code = ((usage->hid - 1) & HID_USAGE);
switch (field->application) {
case HID_GD_MOUSE:
case HID_GD_POINTER: code += BTN_MOUSE; break;
case HID_GD_JOYSTICK:
if (code <= 0xf)
code += BTN_JOYSTICK;
else
code += BTN_TRIGGER_HAPPY - 0x10;
break;
case HID_GD_GAMEPAD:
if (code <= 0xf)
code += BTN_GAMEPAD;
else
code += BTN_TRIGGER_HAPPY - 0x10;
break;
default:
switch (field->physical) {
case HID_GD_MOUSE:
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;
}
}
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;
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;
default: goto unknown;
}
break;
}
/*
* 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;
if ((usage->hid & 0xf0) == 0x90) { /* D-pad */
switch (usage->hid) {
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;
}
if (field->dpad) {
map_abs(field->dpad);
goto ignore;
}
map_abs(ABS_HAT0X);
break;
}
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:
if (field->flags & HID_MAIN_ITEM_RELATIVE)
map_rel(usage->hid & 0xf);
else
map_abs_clear(usage->hid & 0xf);
break;
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;
case HID_GD_HATSWITCH:
usage->hat_min = field->logical_minimum;
usage->hat_max = field->logical_maximum;
map_abs(ABS_HAT0X);
break;
case HID_GD_START: map_key_clear(BTN_START); break;
case HID_GD_SELECT: map_key_clear(BTN_SELECT); break;
case HID_GD_RFKILL_BTN:
/* MS wireless radio ctl extension, also check CA */
if (field->application == HID_GD_WIRELESS_RADIO_CTLS) {
map_key_clear(KEY_RFKILL);
/* We need to simulate the btn release */
field->flags |= HID_MAIN_ITEM_RELATIVE;
break;
}
default: goto unknown;
}
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) {
case 0x00: /* Undefined */
goto ignore;
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);
}
map_abs_clear(ABS_PRESSURE);
break;
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;
}
break;
case 0x3b: /* Battery Strength */
hidinput_setup_battery(device, HID_INPUT_REPORT, field);
usage->type = EV_PWR;
goto ignore;
case 0x3c: /* Invert */
map_key_clear(BTN_TOOL_RUBBER);
break;
case 0x3d: /* X Tilt */
map_abs_clear(ABS_TILT_X);
break;
case 0x3e: /* Y Tilt */
map_abs_clear(ABS_TILT_Y);
break;
case 0x33: /* Touch */
case 0x42: /* TipSwitch */
case 0x43: /* TipSwitch2 */
device->quirks &= ~HID_QUIRK_NOTOUCH;
map_key_clear(BTN_TOUCH);
break;
case 0x44: /* BarrelSwitch */
map_key_clear(BTN_STYLUS);
break;
case 0x46: /* TabletPick */
case 0x5a: /* SecondaryBarrelSwitch */
map_key_clear(BTN_STYLUS2);
break;
case 0x5b: /* TransducerSerialNumber */
usage->type = EV_MSC;
usage->code = MSC_SERIAL;
bit = input->mscbit;
max = MSC_MAX;
break;
default: goto unknown;
}
break;
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;
case HID_UP_CONSUMER: /* USB HUT v1.12, pages 75-84 */
switch (usage->hid & HID_USAGE) {
case 0x000: goto ignore;
case 0x030: map_key_clear(KEY_POWER); break;
case 0x031: map_key_clear(KEY_RESTART); break;
case 0x032: map_key_clear(KEY_SLEEP); break;
case 0x034: map_key_clear(KEY_SLEEP); break;
case 0x035: map_key_clear(KEY_KBDILLUMTOGGLE); break;
case 0x036: map_key_clear(BTN_MISC); break;
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;
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;
case 0x082: map_key_clear(KEY_VIDEO_NEXT); break;
case 0x083: map_key_clear(KEY_LAST); break;
case 0x084: map_key_clear(KEY_ENTER); break;
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;
case 0x0b9: map_key_clear(KEY_SHUFFLE); break;
case 0x0bf: map_key_clear(KEY_SLOW); break;
case 0x0cd: map_key_clear(KEY_PLAYPAUSE); break;
case 0x0cf: map_key_clear(KEY_VOICECOMMAND); break;
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;
case 0x0f5: map_key_clear(KEY_SLOW); break;
case 0x181: map_key_clear(KEY_BUTTONCONFIG); break;
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;
case 0x18f: map_key_clear(KEY_TASKMANAGER); break;
case 0x190: map_key_clear(KEY_JOURNAL); break;
case 0x191: map_key_clear(KEY_FINANCE); break;
case 0x192: map_key_clear(KEY_CALC); break;
case 0x193: map_key_clear(KEY_PLAYER); break;
case 0x194: map_key_clear(KEY_FILE); break;
case 0x196: map_key_clear(KEY_WWW); break;
case 0x199: map_key_clear(KEY_CHAT); break;
case 0x19c: map_key_clear(KEY_LOGOFF); break;
case 0x19e: map_key_clear(KEY_COFFEE); break;
case 0x19f: map_key_clear(KEY_CONTROLPANEL); break;
case 0x1a2: map_key_clear(KEY_APPSELECT); break;
case 0x1a3: map_key_clear(KEY_NEXT); break;
case 0x1a4: map_key_clear(KEY_PREVIOUS); break;
case 0x1a6: map_key_clear(KEY_HELP); break;
case 0x1a7: map_key_clear(KEY_DOCUMENTS); break;
case 0x1ab: map_key_clear(KEY_SPELLCHECK); break;
case 0x1ae: map_key_clear(KEY_KEYBOARD); break;
case 0x1b1: map_key_clear(KEY_SCREENSAVER); break;
case 0x1b4: map_key_clear(KEY_FILE); break;
case 0x1b6: map_key_clear(KEY_IMAGES); break;
case 0x1b7: map_key_clear(KEY_AUDIO); break;
case 0x1b8: map_key_clear(KEY_VIDEO); break;
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;
case 0x23d: map_key_clear(KEY_EDIT); break;
case 0x25f: map_key_clear(KEY_CANCEL); break;
case 0x269: map_key_clear(KEY_INSERT); break;
case 0x26a: map_key_clear(KEY_DELETE); break;
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;
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;
default: map_key_clear(KEY_UNKNOWN);
}
break;
case HID_UP_GENDEVCTRLS:
switch (usage->hid) {
case HID_DC_BATTERYSTRENGTH:
hidinput_setup_battery(device, HID_INPUT_REPORT, field);
usage->type = EV_PWR;
goto ignore;
}
goto unknown;
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;
default: goto ignore;
}
break;
case HID_UP_HPVENDOR2:
set_bit(EV_REP, input->evbit);
switch (usage->hid & HID_USAGE) {
case 0x001: map_key_clear(KEY_MICMUTE); break;
case 0x003: map_key_clear(KEY_BRIGHTNESSDOWN); break;
case 0x004: map_key_clear(KEY_BRIGHTNESSUP); break;
default: goto ignore;
}
break;
case HID_UP_MSVENDOR:
goto ignore;
case HID_UP_CUSTOM: /* Reported on Logitech and Apple USB keyboards */
set_bit(EV_REP, input->evbit);
goto ignore;
case HID_UP_LOGIVENDOR:
/* intentional fallback */
case HID_UP_LOGIVENDOR2:
/* intentional fallback */
case HID_UP_LOGIVENDOR3:
goto ignore;
case HID_UP_PID:
switch (usage->hid & HID_USAGE) {
case 0xa4: map_key_clear(BTN_DEAD); break;
default: goto ignore;
}
break;
default:
unknown:
if (field->report_size == 1) {
if (field->report->type == HID_OUTPUT_REPORT) {
map_led(LED_MISC);
break;
}
map_key(BTN_MISC);
break;
}
if (field->flags & HID_MAIN_ITEM_RELATIVE) {
map_rel(REL_MISC);
break;
}
map_abs(ABS_MISC);
break;
}
mapped:
if (device->driver->input_mapped && device->driver->input_mapped(device,
hidinput, field, usage, &bit, &max) < 0)
goto ignore;
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);
input_abs_set_res(input, usage->code,
hidinput_calc_abs_res(field, usage->code));
/* 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);
}
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;
}
/* 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);
}
if (usage->type == EV_KEY) {
set_bit(EV_MSC, input->evbit);
set_bit(MSC_SCAN, input->mscbit);
}
ignore:
return;
}
void hidinput_hid_event(struct hid_device *hid, struct hid_field *field, struct hid_usage *usage, __s32 value)
{
struct input_dev *input;
unsigned *quirks = &hid->quirks;
if (!usage->type)
return;
if (usage->type == EV_PWR) {
hidinput_update_battery(hid, value);
return;
}
if (!field->hidinput)
return;
input = field->hidinput->input;
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);
input_event(input, usage->type, usage->code + 1, hid_hat_to_axis[hat_dir].y);
return;
}
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 */
dbg_hid("Maximum Effects - %d\n",value);
return;
}
if (usage->hid == (HID_UP_PID | 0x7fUL)) {
dbg_hid("PID Pool Report\n");
return;
}
if ((usage->type == EV_KEY) && (usage->code == 0)) /* Key 0 is "unassigned", not KEY_UNKNOWN */
return;
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;
}
/*
* Ignore out-of-range values as per HID specification,
* 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
*
* 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.
*/
if ((field->flags & HID_MAIN_ITEM_VARIABLE) &&
(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);
}
/*
* 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)) &&
(field->flags & HID_MAIN_ITEM_VARIABLE) &&
usage->usage_index < field->maxusage &&
value == field->value[usage->usage_index])
return;
/* 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);
input_event(input, usage->type, usage->code, value);
if ((field->flags & HID_MAIN_ITEM_RELATIVE) &&
usage->type == EV_KEY && value) {
input_sync(input);
input_event(input, usage->type, usage->code, 0);
}
}
void hidinput_report_event(struct hid_device *hid, struct hid_report *report)
{
struct hid_input *hidinput;
if (hid->quirks & HID_QUIRK_NO_INPUT_SYNC)
return;
list_for_each_entry(hidinput, &hid->inputs, list)
input_sync(hidinput->input);
}
EXPORT_SYMBOL_GPL(hidinput_report_event);
int hidinput_find_field(struct hid_device *hid, unsigned int type, unsigned int code, struct hid_field **field)
{
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;
}
EXPORT_SYMBOL_GPL(hidinput_find_field);
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);
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;
int len, ret;
__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 = hid_report_len(report);
buf = hid_alloc_report_buf(report, GFP_KERNEL);
if (!buf)
return;
hid_output_report(report, buf);
/* synchronous output report */
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);
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;
}
static int hidinput_open(struct input_dev *dev)
{
struct hid_device *hid = input_get_drvdata(dev);
return hid_hw_open(hid);
}
static void hidinput_close(struct input_dev *dev)
{
struct hid_device *hid = input_get_drvdata(dev);
hid_hw_close(hid);
}
static void report_features(struct hid_device *hid)
{
struct hid_driver *drv = hid->driver;
struct hid_report_enum *rep_enum;
struct hid_report *rep;
struct hid_usage *usage;
int i, j;
rep_enum = &hid->report_enum[HID_FEATURE_REPORT];
list_for_each_entry(rep, &rep_enum->report_list, list)
for (i = 0; i < rep->maxfield; i++) {
/* Ignore if report count is out of bounds. */
if (rep->field[i]->report_count < 1)
continue;
for (j = 0; j < rep->field[i]->maxusage; j++) {
usage = &rep->field[i]->usage[j];
/* Verify if Battery Strength feature is available */
if (usage->hid == HID_DC_BATTERYSTRENGTH)
hidinput_setup_battery(hid, HID_FEATURE_REPORT,
rep->field[i]);
if (drv->feature_mapping)
drv->feature_mapping(hid, rep->field[i], usage);
}
}
}
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);
input_dev->event = hidinput_input_event;
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;
input_dev->dev.parent = &hid->dev;
hidinput->input = input_dev;
list_add_tail(&hidinput->list, &hid->inputs);
return hidinput;
}
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);
}
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;
}
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);
}
/*
* Register the input device; print a message.
* Configure the input layer interface
* Read all reports and initialize the absolute field values.
*/
int hidinput_connect(struct hid_device *hid, unsigned int force)
{
struct hid_driver *drv = hid->driver;
struct hid_report *report;
struct hid_input *next, *hidinput = NULL;
int i, k;
INIT_LIST_HEAD(&hid->inputs);
INIT_WORK(&hid->led_work, hidinput_led_worker);
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;
}
if (i == hid->maxcollection)
return -1;
}
report_features(hid);
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) {
if (!report->maxfield)
continue;
/*
* Find the previous hidinput report attached
* to this report id.
*/
if (hid->quirks & HID_QUIRK_MULTI_INPUT)
hidinput = hidinput_match(report);
if (!hidinput) {
hidinput = hidinput_allocate(hid);
if (!hidinput)
goto out_unwind;
}
hidinput_configure_usages(hidinput, report);
if (hid->quirks & HID_QUIRK_MULTI_INPUT)
hidinput->report = report;
}
}
list_for_each_entry_safe(hidinput, next, &hid->inputs, list) {
if ((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);
continue;
}
if (drv->input_configured &&
drv->input_configured(hid, hidinput))
goto out_unwind;
if (input_register_device(hidinput->input))
goto out_unwind;
hidinput->registered = true;
}
if (list_empty(&hid->inputs)) {
hid_err(hid, "No inputs registered, leaving\n");
goto out_unwind;
}
return 0;
out_unwind:
/* unwind the ones we already registered */
hidinput_disconnect(hid);
return -1;
}
EXPORT_SYMBOL_GPL(hidinput_connect);
void hidinput_disconnect(struct hid_device *hid)
{
struct hid_input *hidinput, *next;
hidinput_cleanup_battery(hid);
list_for_each_entry_safe(hidinput, next, &hid->inputs, list) {
list_del(&hidinput->list);
if (hidinput->registered)
input_unregister_device(hidinput->input);
else
input_free_device(hidinput->input);
kfree(hidinput);
}
/* 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);
}
EXPORT_SYMBOL_GPL(hidinput_disconnect);
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