// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Copyright ( c ) 2000 - 2001 Vojtech Pavlik
* Copyright ( c ) 2006 - 2010 Jiri Kosina
*
* HID to Linux Input mapping
*/
/*
*
* Should you need to contact me , the author , you can do so either by
* e - mail - mail your message to < vojtech @ ucw . cz > , or by paper mail :
* Vojtech Pavlik , Simunkova 1594 , Prague 8 , 182 00 Czech Republic
*/
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/kernel.h>
#include <linux/hid.h>
#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 }};
struct usage_priority {
__u32 usage; /* the HID usage associated */
bool global; /* we assume all usages to be slotted,
* unless global
*/
unsigned int slot_overwrite; /* for globals: allows to set the usage
* before or after the slots
*/
};
/*
* hid - input will convert this list into priorities :
* the first element will have the highest priority
* ( the length of the following array ) and the last
* element the lowest ( 1 ) .
*
* hid - input will then shift the priority by 8 bits to leave some space
* in case drivers want to interleave other fields .
*
* To accommodate slotted devices , the slot priority is
* defined in the next 8 bits ( defined by 0 xff - slot ) .
*
* If drivers want to add fields before those , hid - input will
* leave out the first 8 bits of the priority value .
*
* This still leaves us 65535 individual priority values .
*/
static const struct usage_priority hidinput_usages_priorities[] = {
{ /* Eraser (eraser touching) must always come before tipswitch */
.usage = HID_DG_ERASER,
},
{ /* Invert must always come before In Range */
.usage = HID_DG_INVERT,
},
{ /* Is the tip of the tool touching? */
.usage = HID_DG_TIPSWITCH,
},
{ /* Tip Pressure might emulate tip switch */
.usage = HID_DG_TIPPRESSURE,
},
{ /* In Range needs to come after the other tool states */
.usage = HID_DG_INRANGE,
},
};
#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_msc(c) hid_map_usage(hidinput, usage, &bit, &max, EV_MSC, (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->type = EV_KEY;
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 == 0 x11) { /* If centimeters */
/* Convert to millimeters */
unit_exponent += 1 ;
} else if (field->unit == 0 x13) { /* 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 == 0 x14) { /* If degrees */
/* Convert to radians */
prev = logical_extents;
logical_extents *= 573 ;
if (logical_extents < prev)
return 0 ;
unit_exponent += 1 ;
} else if (field->unit != 0 x12) { /* 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 */
#define HID_BATTERY_QUIRK_AVOID_QUERY (1 << 3 ) /* do not query 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_APPLE,
USB_DEVICE_ID_APPLE_MAGICTRACKPAD),
HID_BATTERY_QUIRK_IGNORE },
{ HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_ELECOM,
USB_DEVICE_ID_ELECOM_BM084),
HID_BATTERY_QUIRK_IGNORE },
{ HID_USB_DEVICE(USB_VENDOR_ID_SYMBOL,
USB_DEVICE_ID_SYMBOL_SCANNER_3),
HID_BATTERY_QUIRK_IGNORE },
{ HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_ASUSTEK,
USB_DEVICE_ID_ASUSTEK_T100CHI_KEYBOARD),
HID_BATTERY_QUIRK_IGNORE },
{ HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_LOGITECH,
USB_DEVICE_ID_LOGITECH_DINOVO_EDGE_KBD),
HID_BATTERY_QUIRK_IGNORE },
{ HID_USB_DEVICE(USB_VENDOR_ID_ELAN, USB_DEVICE_ID_ASUS_UX550_TOUCHSCREEN),
HID_BATTERY_QUIRK_IGNORE },
{ HID_USB_DEVICE(USB_VENDOR_ID_ELAN, USB_DEVICE_ID_ASUS_UX550VE_TOUCHSCREEN),
HID_BATTERY_QUIRK_IGNORE },
{ HID_USB_DEVICE(USB_VENDOR_ID_UGEE, USB_DEVICE_ID_UGEE_XPPEN_TABLET_DECO_L),
HID_BATTERY_QUIRK_AVOID_QUERY },
{ HID_USB_DEVICE(USB_VENDOR_ID_UGEE, USB_DEVICE_ID_UGEE_XPPEN_TABLET_DECO_PRO_MW),
HID_BATTERY_QUIRK_AVOID_QUERY },
{ HID_USB_DEVICE(USB_VENDOR_ID_UGEE, USB_DEVICE_ID_UGEE_XPPEN_TABLET_DECO_PRO_SW),
HID_BATTERY_QUIRK_AVOID_QUERY },
{ HID_I2C_DEVICE(USB_VENDOR_ID_ELAN, I2C_DEVICE_ID_CHROMEBOOK_TROGDOR_POMPOM),
HID_BATTERY_QUIRK_AVOID_QUERY },
/*
* Elan I2C - HID touchscreens seem to all report a non present battery ,
* set HID_BATTERY_QUIRK_IGNORE for all Elan I2C - HID devices .
*/
{ HID_I2C_DEVICE(USB_VENDOR_ID_ELAN, HID_ANY_ID), 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(4 , GFP_KERNEL);
if (!buf)
return -ENOMEM;
ret = hid_hw_raw_request(dev, dev->battery_report_id, buf, 4 ,
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_status != HID_BATTERY_REPORTED &&
!dev->battery_avoid_query) {
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_status != HID_BATTERY_REPORTED &&
!dev->battery_avoid_query) {
value = hidinput_query_battery_capacity(dev);
if (value < 0 )
return value;
dev->battery_capacity = value;
dev->battery_status = HID_BATTERY_QUERIED;
}
if (dev->battery_status == HID_BATTERY_UNKNOWN)
val->intval = POWER_SUPPLY_STATUS_UNKNOWN;
else
val->intval = dev->battery_charge_status;
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, bool is_percentage)
{
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 (is_percentage || (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_charge_status = POWER_SUPPLY_STATUS_DISCHARGING;
/*
* Stylus is normally not connected to the device and thus we
* can ' t query the device and get meaningful battery strength .
* We have to wait for the device to report it on its own .
*/
dev->battery_avoid_query = report_type == HID_INPUT_REPORT &&
field->physical == HID_DG_STYLUS;
if (quirks & HID_BATTERY_QUIRK_AVOID_QUERY)
dev->battery_avoid_query = true ;
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 bool hidinput_update_battery_charge_status(struct hid_device *dev,
unsigned int usage, int value)
{
switch (usage) {
case HID_BAT_CHARGING:
dev->battery_charge_status = value ?
POWER_SUPPLY_STATUS_CHARGING :
POWER_SUPPLY_STATUS_DISCHARGING;
return true ;
}
return false ;
}
static void hidinput_update_battery(struct hid_device *dev, unsigned int usage,
int value)
{
int capacity;
if (!dev->battery)
return ;
if (hidinput_update_battery_charge_status(dev, usage, value)) {
power_supply_changed(dev->battery);
return ;
}
if ((usage & HID_USAGE_PAGE) == HID_UP_DIGITIZER && value == 0 )
return ;
if (value < dev->battery_min || value > dev->battery_max)
return ;
capacity = hidinput_scale_battery_capacity(dev, value);
if (dev->battery_status != HID_BATTERY_REPORTED ||
capacity != dev->battery_capacity ||
ktime_after(ktime_get_coarse(), dev->battery_ratelimit_time)) {
dev->battery_capacity = capacity;
dev->battery_status = HID_BATTERY_REPORTED;
dev->battery_ratelimit_time =
ktime_add_ms(ktime_get_coarse(), 30 * 1000 );
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, bool is_percentage)
{
return 0 ;
}
static void hidinput_cleanup_battery(struct hid_device *dev)
{
}
static void hidinput_update_battery(struct hid_device *dev, unsigned int usage,
int value)
{
}
#endif /* CONFIG_HID_BATTERY_STRENGTH */
static bool hidinput_field_in_collection(struct hid_device *device, struct hid_field *field,
unsigned int type, unsigned int usage)
{
struct hid_collection *collection;
collection = &device->collection[field->usage->collection_index];
return collection->type == type && collection->usage == usage;
}
static void hidinput_configure_usage(struct hid_input *hidinput, struct hid_field *field,
struct hid_usage *usage, unsigned int usage_index)
{
struct input_dev *input = hidinput->input;
struct hid_device *device = input_get_drvdata(input);
const struct usage_priority *usage_priority = NULL;
int max = 0 , code;
unsigned int i = 0 ;
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;
}
/* assign a priority based on the static list declared here */
for (i = 0 ; i < ARRAY_SIZE(hidinput_usages_priorities); i++) {
if (usage->hid == hidinput_usages_priorities[i].usage) {
usage_priority = &hidinput_usages_priorities[i];
field->usages_priorities[usage_index] =
(ARRAY_SIZE(hidinput_usages_priorities) - i) << 8 ;
break ;
}
}
/*
* For slotted devices , we need to also add the slot index
* in the priority .
*/
if (usage_priority && usage_priority->global)
field->usages_priorities[usage_index] |=
usage_priority->slot_overwrite;
else
field->usages_priorities[usage_index] |=
(0 xff - field->slot_idx) << 16 ;
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 <= 0 xf)
code += BTN_JOYSTICK;
else
code += BTN_TRIGGER_HAPPY - 0 x10;
break ;
case HID_GD_GAMEPAD:
if (code <= 0 xf)
code += BTN_GAMEPAD;
else
code += BTN_TRIGGER_HAPPY - 0 x10;
break ;
case HID_CP_CONSUMER_CONTROL:
if (hidinput_field_in_collection(device, field,
HID_COLLECTION_NAMED_ARRAY,
HID_CP_PROGRAMMABLEBUTTONS)) {
if (code <= 0 x1d)
code += KEY_MACRO1;
else
code += BTN_TRIGGER_HAPPY - 0 x1e;
break ;
}
fallthrough;
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 & 0 xffff) {
case 0 xba: map_abs(ABS_RUDDER); break ;
case 0 xbb: map_abs(ABS_THROTTLE); break ;
case 0 xc4: map_abs(ABS_GAS); break ;
case 0 xc5: map_abs(ABS_BRAKE); break ;
case 0 xc8: map_abs(ABS_WHEEL); break ;
default : goto ignore;
}
break ;
case HID_UP_GENDESK:
if ((usage->hid & 0 xf0) == 0 x80) { /* SystemControl */
switch (usage->hid & 0 xf) {
case 0 x1: map_key_clear(KEY_POWER); break ;
case 0 x2: map_key_clear(KEY_SLEEP); break ;
case 0 x3: map_key_clear(KEY_WAKEUP); break ;
case 0 x4: map_key_clear(KEY_CONTEXT_MENU); break ;
case 0 x5: map_key_clear(KEY_MENU); break ;
case 0 x6: map_key_clear(KEY_PROG1); break ;
case 0 x7: map_key_clear(KEY_HELP); break ;
case 0 x8: map_key_clear(KEY_EXIT); break ;
case 0 x9: map_key_clear(KEY_SELECT); break ;
case 0 xa: map_key_clear(KEY_RIGHT); break ;
case 0 xb: map_key_clear(KEY_LEFT); break ;
case 0 xc: map_key_clear(KEY_UP); break ;
case 0 xd: map_key_clear(KEY_DOWN); break ;
case 0 xe: map_key_clear(KEY_POWER2); break ;
case 0 xf: map_key_clear(KEY_RESTART); break ;
default : goto unknown;
}
break ;
}
if ((usage->hid & 0 xf0) == 0 x90) { /* SystemControl & 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 ;
case HID_GD_DO_NOT_DISTURB:
map_key_clear(KEY_DO_NOT_DISTURB); break ;
default : goto unknown;
}
if (usage->hid <= HID_GD_LEFT) {
if (field->dpad) {
map_abs(field->dpad);
goto ignore;
}
map_abs(ABS_HAT0X);
}
break ;
}
if ((usage->hid & 0 xf0) == 0 xa0) { /* SystemControl */
switch (usage->hid & 0 xf) {
case 0 x9: map_key_clear(KEY_MICMUTE); break ;
case 0 xa: map_key_clear(KEY_ACCESSIBILITY); break ;
default : goto ignore;
}
break ;
}
if ((usage->hid & 0 xf0) == 0 xb0) { /* SC - Display */
switch (usage->hid & 0 xf) {
case 0 x05: map_key_clear(KEY_SWITCHVIDEOMODE); break ;
default : goto ignore;
}
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;
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 & 0 xf);
else
map_abs_clear(usage->hid & 0 xf);
break ;
case HID_GD_WHEEL:
if (field->flags & HID_MAIN_ITEM_RELATIVE) {
set_bit(REL_WHEEL, input->relbit);
map_rel(REL_WHEEL_HI_RES);
} else {
map_abs(usage->hid & 0 xf);
}
break ;
case HID_GD_SLIDER: case HID_GD_DIAL:
if (field->flags & HID_MAIN_ITEM_RELATIVE)
map_rel(usage->hid & 0 xf);
else
map_abs(usage->hid & 0 xf);
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 ;
}
goto unknown;
default : goto unknown;
}
break ;
case HID_UP_LED:
switch (usage->hid & 0 xffff) { /* HID-Value: */
case 0 x01: map_led (LED_NUML); break ; /* "Num Lock" */
case 0 x02: map_led (LED_CAPSL); break ; /* "Caps Lock" */
case 0 x03: map_led (LED_SCROLLL); break ; /* "Scroll Lock" */
case 0 x04: map_led (LED_COMPOSE); break ; /* "Compose" */
case 0 x05: map_led (LED_KANA); break ; /* "Kana" */
case 0 x27: map_led (LED_SLEEP); break ; /* "Stand-By" */
case 0 x4c: map_led (LED_SUSPEND); break ; /* "System Suspend" */
case 0 x09: map_led (LED_MUTE); break ; /* "Mute" */
case 0 x4b: map_led (LED_MISC); break ; /* "Generic Indicator" */
case 0 x19: map_led (LED_MAIL); break ; /* "Message Waiting" */
case 0 x4d: map_led (LED_CHARGING); break ; /* "External Power Connected" */
default : goto ignore;
}
break ;
case HID_UP_DIGITIZER:
if ((field->application & 0 xff) == 0 x01) /* Digitizer */
__set_bit(INPUT_PROP_POINTER, input->propbit);
else if ((field->application & 0 xff) == 0 x02) /* Pen */
__set_bit(INPUT_PROP_DIRECT, input->propbit);
switch (usage->hid & 0 xff) {
case 0 x00: /* Undefined */
goto ignore;
case 0 x30: /* 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 0 x32: /* InRange */
switch (field->physical) {
case HID_DG_PUCK:
map_key(BTN_TOOL_MOUSE);
break ;
case HID_DG_FINGER:
map_key(BTN_TOOL_FINGER);
break ;
default :
/*
* If the physical is not given ,
* rely on the application .
*/
if (!field->physical) {
switch (field->application) {
case HID_DG_TOUCHSCREEN:
case HID_DG_TOUCHPAD:
map_key_clear(BTN_TOOL_FINGER);
break ;
default :
map_key_clear(BTN_TOOL_PEN);
}
} else {
map_key(BTN_TOOL_PEN);
}
break ;
}
break ;
case 0 x3b: /* Battery Strength */
hidinput_setup_battery(device, HID_INPUT_REPORT, field, false );
usage->type = EV_PWR;
return ;
case 0 x3c: /* Invert */
device->quirks &= ~HID_QUIRK_NOINVERT;
map_key_clear(BTN_TOOL_RUBBER);
break ;
case 0 x3d: /* X Tilt */
map_abs_clear(ABS_TILT_X);
break ;
case 0 x3e: /* Y Tilt */
map_abs_clear(ABS_TILT_Y);
break ;
case 0 x33: /* Touch */
case 0 x42: /* TipSwitch */
case 0 x43: /* TipSwitch2 */
device->quirks &= ~HID_QUIRK_NOTOUCH;
map_key_clear(BTN_TOUCH);
break ;
case 0 x44: /* BarrelSwitch */
map_key_clear(BTN_STYLUS);
break ;
case 0 x45: /* ERASER */
/*
* This event is reported when eraser tip touches the surface .
* Actual eraser ( BTN_TOOL_RUBBER ) is set and released either
* by Invert if tool reports proximity or by Eraser directly .
*/
if (!test_bit(BTN_TOOL_RUBBER, input->keybit)) {
device->quirks |= HID_QUIRK_NOINVERT;
set_bit(BTN_TOOL_RUBBER, input->keybit);
}
map_key_clear(BTN_TOUCH);
break ;
case 0 x46: /* TabletPick */
case 0 x5a: /* SecondaryBarrelSwitch */
map_key_clear(BTN_STYLUS2);
break ;
case 0 x5b: /* TransducerSerialNumber */
case 0 x6e: /* TransducerSerialNumber2 */
map_msc(MSC_SERIAL);
break ;
default : goto unknown;
}
break ;
case HID_UP_TELEPHONY:
switch (usage->hid & HID_USAGE) {
case 0 x2f: map_key_clear(KEY_MICMUTE); break ;
case 0 xb0: map_key_clear(KEY_NUMERIC_0); break ;
case 0 xb1: map_key_clear(KEY_NUMERIC_1); break ;
case 0 xb2: map_key_clear(KEY_NUMERIC_2); break ;
case 0 xb3: map_key_clear(KEY_NUMERIC_3); break ;
case 0 xb4: map_key_clear(KEY_NUMERIC_4); break ;
case 0 xb5: map_key_clear(KEY_NUMERIC_5); break ;
case 0 xb6: map_key_clear(KEY_NUMERIC_6); break ;
case 0 xb7: map_key_clear(KEY_NUMERIC_7); break ;
case 0 xb8: map_key_clear(KEY_NUMERIC_8); break ;
case 0 xb9: map_key_clear(KEY_NUMERIC_9); break ;
case 0 xba: map_key_clear(KEY_NUMERIC_STAR); break ;
case 0 xbb: map_key_clear(KEY_NUMERIC_POUND); break ;
case 0 xbc: map_key_clear(KEY_NUMERIC_A); break ;
case 0 xbd: map_key_clear(KEY_NUMERIC_B); break ;
case 0 xbe: map_key_clear(KEY_NUMERIC_C); break ;
case 0 xbf: 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 0 x000: goto ignore;
case 0 x030: map_key_clear(KEY_POWER); break ;
case 0 x031: map_key_clear(KEY_RESTART); break ;
case 0 x032: map_key_clear(KEY_SLEEP); break ;
case 0 x034: map_key_clear(KEY_SLEEP); break ;
case 0 x035: map_key_clear(KEY_KBDILLUMTOGGLE); break ;
case 0 x036: map_key_clear(BTN_MISC); break ;
case 0 x040: map_key_clear(KEY_MENU); break ; /* Menu */
case 0 x041: map_key_clear(KEY_SELECT); break ; /* Menu Pick */
case 0 x042: map_key_clear(KEY_UP); break ; /* Menu Up */
case 0 x043: map_key_clear(KEY_DOWN); break ; /* Menu Down */
case 0 x044: map_key_clear(KEY_LEFT); break ; /* Menu Left */
case 0 x045: map_key_clear(KEY_RIGHT); break ; /* Menu Right */
case 0 x046: map_key_clear(KEY_ESC); break ; /* Menu Escape */
case 0 x047: map_key_clear(KEY_KPPLUS); break ; /* Menu Value Increase */
case 0 x048: map_key_clear(KEY_KPMINUS); break ; /* Menu Value Decrease */
case 0 x060: map_key_clear(KEY_INFO); break ; /* Data On Screen */
case 0 x061: map_key_clear(KEY_SUBTITLE); break ; /* Closed Caption */
case 0 x063: map_key_clear(KEY_VCR); break ; /* VCR/TV */
case 0 x065: map_key_clear(KEY_CAMERA); break ; /* Snapshot */
case 0 x069: map_key_clear(KEY_RED); break ;
case 0 x06a: map_key_clear(KEY_GREEN); break ;
case 0 x06b: map_key_clear(KEY_BLUE); break ;
case 0 x06c: map_key_clear(KEY_YELLOW); break ;
case 0 x06d: map_key_clear(KEY_ASPECT_RATIO); break ;
case 0 x06f: map_key_clear(KEY_BRIGHTNESSUP); break ;
case 0 x070: map_key_clear(KEY_BRIGHTNESSDOWN); break ;
case 0 x072: map_key_clear(KEY_BRIGHTNESS_TOGGLE); break ;
case 0 x073: map_key_clear(KEY_BRIGHTNESS_MIN); break ;
case 0 x074: map_key_clear(KEY_BRIGHTNESS_MAX); break ;
case 0 x075: map_key_clear(KEY_BRIGHTNESS_AUTO); break ;
case 0 x076: map_key_clear(KEY_CAMERA_ACCESS_ENABLE); break ;
case 0 x077: map_key_clear(KEY_CAMERA_ACCESS_DISABLE); break ;
case 0 x078: map_key_clear(KEY_CAMERA_ACCESS_TOGGLE); break ;
case 0 x079: map_key_clear(KEY_KBDILLUMUP); break ;
case 0 x07a: map_key_clear(KEY_KBDILLUMDOWN); break ;
case 0 x07c: map_key_clear(KEY_KBDILLUMTOGGLE); break ;
case 0 x082: map_key_clear(KEY_VIDEO_NEXT); break ;
case 0 x083: map_key_clear(KEY_LAST); break ;
case 0 x084: map_key_clear(KEY_ENTER); break ;
case 0 x088: map_key_clear(KEY_PC); break ;
case 0 x089: map_key_clear(KEY_TV); break ;
case 0 x08a: map_key_clear(KEY_WWW); break ;
case 0 x08b: map_key_clear(KEY_DVD); break ;
case 0 x08c: map_key_clear(KEY_PHONE); break ;
case 0 x08d: map_key_clear(KEY_PROGRAM); break ;
case 0 x08e: map_key_clear(KEY_VIDEOPHONE); break ;
case 0 x08f: map_key_clear(KEY_GAMES); break ;
case 0 x090: map_key_clear(KEY_MEMO); break ;
case 0 x091: map_key_clear(KEY_CD); break ;
case 0 x092: map_key_clear(KEY_VCR); break ;
case 0 x093: map_key_clear(KEY_TUNER); break ;
case 0 x094: map_key_clear(KEY_EXIT); break ;
case 0 x095: map_key_clear(KEY_HELP); break ;
case 0 x096: map_key_clear(KEY_TAPE); break ;
case 0 x097: map_key_clear(KEY_TV2); break ;
case 0 x098: map_key_clear(KEY_SAT); break ;
case 0 x09a: map_key_clear(KEY_PVR); break ;
case 0 x09c: map_key_clear(KEY_CHANNELUP); break ;
case 0 x09d: map_key_clear(KEY_CHANNELDOWN); break ;
case 0 x0a0: map_key_clear(KEY_VCR2); break ;
case 0 x0b0: map_key_clear(KEY_PLAY); break ;
case 0 x0b1: map_key_clear(KEY_PAUSE); break ;
case 0 x0b2: map_key_clear(KEY_RECORD); break ;
case 0 x0b3: map_key_clear(KEY_FASTFORWARD); break ;
case 0 x0b4: map_key_clear(KEY_REWIND); break ;
case 0 x0b5: map_key_clear(KEY_NEXTSONG); break ;
case 0 x0b6: map_key_clear(KEY_PREVIOUSSONG); break ;
case 0 x0b7: map_key_clear(KEY_STOPCD); break ;
case 0 x0b8: map_key_clear(KEY_EJECTCD); break ;
case 0 x0bc: map_key_clear(KEY_MEDIA_REPEAT); break ;
case 0 x0b9: map_key_clear(KEY_SHUFFLE); break ;
case 0 x0bf: map_key_clear(KEY_SLOW); break ;
case 0 x0cd: map_key_clear(KEY_PLAYPAUSE); break ;
case 0 x0cf: map_key_clear(KEY_VOICECOMMAND); break ;
case 0 x0d8: map_key_clear(KEY_DICTATE); break ;
case 0 x0d9: map_key_clear(KEY_EMOJI_PICKER); break ;
case 0 x0e0: map_abs_clear(ABS_VOLUME); break ;
case 0 x0e2: map_key_clear(KEY_MUTE); break ;
case 0 x0e5: map_key_clear(KEY_BASSBOOST); break ;
case 0 x0e9: map_key_clear(KEY_VOLUMEUP); break ;
case 0 x0ea: map_key_clear(KEY_VOLUMEDOWN); break ;
case 0 x0f5: map_key_clear(KEY_SLOW); break ;
case 0 x181: map_key_clear(KEY_BUTTONCONFIG); break ;
case 0 x182: map_key_clear(KEY_BOOKMARKS); break ;
case 0 x183: map_key_clear(KEY_CONFIG); break ;
case 0 x184: map_key_clear(KEY_WORDPROCESSOR); break ;
case 0 x185: map_key_clear(KEY_EDITOR); break ;
case 0 x186: map_key_clear(KEY_SPREADSHEET); break ;
case 0 x187: map_key_clear(KEY_GRAPHICSEDITOR); break ;
case 0 x188: map_key_clear(KEY_PRESENTATION); break ;
case 0 x189: map_key_clear(KEY_DATABASE); break ;
case 0 x18a: map_key_clear(KEY_MAIL); break ;
case 0 x18b: map_key_clear(KEY_NEWS); break ;
case 0 x18c: map_key_clear(KEY_VOICEMAIL); break ;
case 0 x18d: map_key_clear(KEY_ADDRESSBOOK); break ;
case 0 x18e: map_key_clear(KEY_CALENDAR); break ;
case 0 x18f: map_key_clear(KEY_TASKMANAGER); break ;
case 0 x190: map_key_clear(KEY_JOURNAL); break ;
case 0 x191: map_key_clear(KEY_FINANCE); break ;
case 0 x192: map_key_clear(KEY_CALC); break ;
case 0 x193: map_key_clear(KEY_PLAYER); break ;
case 0 x194: map_key_clear(KEY_FILE); break ;
case 0 x196: map_key_clear(KEY_WWW); break ;
case 0 x199: map_key_clear(KEY_CHAT); break ;
case 0 x19c: map_key_clear(KEY_LOGOFF); break ;
case 0 x19e: map_key_clear(KEY_COFFEE); break ;
case 0 x19f: map_key_clear(KEY_CONTROLPANEL); break ;
case 0 x1a2: map_key_clear(KEY_APPSELECT); break ;
case 0 x1a3: map_key_clear(KEY_NEXT); break ;
case 0 x1a4: map_key_clear(KEY_PREVIOUS); break ;
case 0 x1a6: map_key_clear(KEY_HELP); break ;
case 0 x1a7: map_key_clear(KEY_DOCUMENTS); break ;
case 0 x1ab: map_key_clear(KEY_SPELLCHECK); break ;
case 0 x1ae: map_key_clear(KEY_KEYBOARD); break ;
case 0 x1b1: map_key_clear(KEY_SCREENSAVER); break ;
case 0 x1b4: map_key_clear(KEY_FILE); break ;
case 0 x1b6: map_key_clear(KEY_IMAGES); break ;
case 0 x1b7: map_key_clear(KEY_AUDIO); break ;
case 0 x1b8: map_key_clear(KEY_VIDEO); break ;
case 0 x1bc: map_key_clear(KEY_MESSENGER); break ;
case 0 x1bd: map_key_clear(KEY_INFO); break ;
case 0 x1cb: map_key_clear(KEY_ASSISTANT); break ;
case 0 x201: map_key_clear(KEY_NEW); break ;
case 0 x202: map_key_clear(KEY_OPEN); break ;
case 0 x203: map_key_clear(KEY_CLOSE); break ;
case 0 x204: map_key_clear(KEY_EXIT); break ;
case 0 x207: map_key_clear(KEY_SAVE); break ;
case 0 x208: map_key_clear(KEY_PRINT); break ;
case 0 x209: map_key_clear(KEY_PROPS); break ;
case 0 x21a: map_key_clear(KEY_UNDO); break ;
case 0 x21b: map_key_clear(KEY_COPY); break ;
case 0 x21c: map_key_clear(KEY_CUT); break ;
case 0 x21d: map_key_clear(KEY_PASTE); break ;
case 0 x21f: map_key_clear(KEY_FIND); break ;
case 0 x221: map_key_clear(KEY_SEARCH); break ;
case 0 x222: map_key_clear(KEY_GOTO); break ;
case 0 x223: map_key_clear(KEY_HOMEPAGE); break ;
case 0 x224: map_key_clear(KEY_BACK); break ;
case 0 x225: map_key_clear(KEY_FORWARD); break ;
case 0 x226: map_key_clear(KEY_STOP); break ;
case 0 x227: map_key_clear(KEY_REFRESH); break ;
case 0 x22a: map_key_clear(KEY_BOOKMARKS); break ;
case 0 x22d: map_key_clear(KEY_ZOOMIN); break ;
case 0 x22e: map_key_clear(KEY_ZOOMOUT); break ;
case 0 x22f: map_key_clear(KEY_ZOOMRESET); break ;
case 0 x232: map_key_clear(KEY_FULL_SCREEN); break ;
case 0 x233: map_key_clear(KEY_SCROLLUP); break ;
case 0 x234: map_key_clear(KEY_SCROLLDOWN); break ;
case 0 x238: /* AC Pan */
set_bit(REL_HWHEEL, input->relbit);
map_rel(REL_HWHEEL_HI_RES);
break ;
case 0 x23d: map_key_clear(KEY_EDIT); break ;
case 0 x25f: map_key_clear(KEY_CANCEL); break ;
case 0 x269: map_key_clear(KEY_INSERT); break ;
case 0 x26a: map_key_clear(KEY_DELETE); break ;
case 0 x279: map_key_clear(KEY_REDO); break ;
case 0 x289: map_key_clear(KEY_REPLY); break ;
case 0 x28b: map_key_clear(KEY_FORWARDMAIL); break ;
case 0 x28c: map_key_clear(KEY_SEND); break ;
case 0 x29d: map_key_clear(KEY_KBD_LAYOUT_NEXT); break ;
case 0 x2a2: map_key_clear(KEY_ALL_APPLICATIONS); break ;
case 0 x2c7: map_key_clear(KEY_KBDINPUTASSIST_PREV); break ;
case 0 x2c8: map_key_clear(KEY_KBDINPUTASSIST_NEXT); break ;
case 0 x2c9: map_key_clear(KEY_KBDINPUTASSIST_PREVGROUP); break ;
case 0 x2ca: map_key_clear(KEY_KBDINPUTASSIST_NEXTGROUP); break ;
case 0 x2cb: map_key_clear(KEY_KBDINPUTASSIST_ACCEPT); break ;
case 0 x2cc: map_key_clear(KEY_KBDINPUTASSIST_CANCEL); break ;
case 0 x29f: map_key_clear(KEY_SCALE); 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, false );
usage->type = EV_PWR;
return ;
}
goto unknown;
case HID_UP_BATTERY:
switch (usage->hid) {
case HID_BAT_ABSOLUTESTATEOFCHARGE:
hidinput_setup_battery(device, HID_INPUT_REPORT, field, true );
usage->type = EV_PWR;
return ;
case HID_BAT_CHARGING:
usage->type = EV_PWR;
return ;
}
goto unknown;
case HID_UP_CAMERA:
switch (usage->hid & HID_USAGE) {
case 0 x020:
map_key_clear(KEY_CAMERA_FOCUS); break ;
case 0 x021:
map_key_clear(KEY_CAMERA); break ;
default :
goto ignore;
}
break ;
case HID_UP_HPVENDOR: /* Reported on a Dutch layout HP5308 */
set_bit(EV_REP, input->evbit);
switch (usage->hid & HID_USAGE) {
case 0 x021: map_key_clear(KEY_PRINT); break ;
case 0 x070: map_key_clear(KEY_HP); break ;
case 0 x071: map_key_clear(KEY_CAMERA); break ;
case 0 x072: map_key_clear(KEY_SOUND); break ;
case 0 x073: map_key_clear(KEY_QUESTION); break ;
case 0 x080: map_key_clear(KEY_EMAIL); break ;
case 0 x081: map_key_clear(KEY_CHAT); break ;
case 0 x082: map_key_clear(KEY_SEARCH); break ;
case 0 x083: map_key_clear(KEY_CONNECT); break ;
case 0 x084: map_key_clear(KEY_FINANCE); break ;
case 0 x085: map_key_clear(KEY_SPORT); break ;
case 0 x086: 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 0 x001: map_key_clear(KEY_MICMUTE); break ;
case 0 x003: map_key_clear(KEY_BRIGHTNESSDOWN); break ;
case 0 x004: 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 0 xa4: 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:
/* Mapping failed, bail out */
if (!bit)
return ;
if (device->driver->input_mapped &&
device->driver->input_mapped(device, hidinput, field, usage,
&bit, &max) < 0 ) {
/*
* The driver indicated that no further generic handling
* of the usage is desired .
*/
return ;
}
set_bit(usage->type, input->evbit);
/*
* This part is * really * controversial :
* - HID aims at being generic so we should do our best to export
* all incoming events
* - HID describes what events are , so there is no reason for ABS_X
* to be mapped to ABS_Y
* - HID is using * _ MISC + N as a default value , but nothing prevents
* * _ MISC + N to overwrite a legitimate even , which confuses userspace
* ( for instance ABS_MISC + 7 is ABS_MT_SLOT , which has a different
* processing )
*
* If devices still want to use this ( at their own risk ) , they will
* have to use the quirk HID_QUIRK_INCREMENT_USAGE_ON_DUPLICATE , but
* the default should be a reliable mapping .
*/
while (usage->code <= max && test_and_set_bit(usage->code, bit)) {
if (device->quirks & HID_QUIRK_INCREMENT_USAGE_ON_DUPLICATE) {
usage->code = find_next_zero_bit(bit,
max + 1 ,
usage->code);
} else {
device->status |= HID_STAT_DUP_DETECTED;
goto ignore;
}
}
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);
}
return ;
ignore:
usage->type = 0 ;
usage->code = 0 ;
}
static void hidinput_handle_scroll(struct hid_usage *usage,
struct input_dev *input,
__s32 value)
{
int code;
int hi_res, lo_res;
if (value == 0 )
return ;
if (usage->code == REL_WHEEL_HI_RES)
code = REL_WHEEL;
else
code = REL_HWHEEL;
/*
* Windows reports one wheel click as value 120 . Where a high - res
* scroll wheel is present , a fraction of 120 is reported instead .
* Our REL_WHEEL_HI_RES axis does the same because all HW must
* adhere to the 120 expectation .
*/
hi_res = value * 120 /usage->resolution_multiplier;
usage->wheel_accumulated += hi_res;
lo_res = usage->wheel_accumulated/120 ;
if (lo_res)
usage->wheel_accumulated -= lo_res * 120 ;
input_event(input, EV_REL, code, lo_res);
input_event(input, EV_REL, usage->code, hi_res);
}
static void hid_report_release_tool(struct hid_report *report, struct input_dev *input,
unsigned int tool)
{
/* if the given tool is not currently reported, ignore */
if (!test_bit(tool, input->key))
return ;
/*
* if the given tool was previously set , release it ,
* release any TOUCH and send an EV_SYN
*/
input_event(input, EV_KEY, BTN_TOUCH, 0 );
input_event(input, EV_KEY, tool, 0 );
input_event(input, EV_SYN, SYN_REPORT, 0 );
report->tool = 0 ;
}
static void hid_report_set_tool(struct hid_report *report, struct input_dev *input,
unsigned int new_tool)
{
if (report->tool != new_tool)
hid_report_release_tool(report, input, report->tool);
input_event(input, EV_KEY, new_tool, 1 );
report->tool = new_tool;
}
void hidinput_hid_event(struct hid_device *hid, struct hid_field *field, struct hid_usage *usage, __s32 value)
{
struct input_dev *input;
struct hid_report *report = field->report;
unsigned *quirks = &hid->quirks;
if (!usage->type)
return ;
if (usage->type == EV_PWR) {
hidinput_update_battery(hid, usage->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 ;
}
/*
* 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);
}
switch (usage->hid) {
case HID_DG_ERASER:
report->tool_active |= !!value;
/*
* if eraser is set , we must enforce BTN_TOOL_RUBBER
* to accommodate for devices not following the spec .
*/
if (value)
hid_report_set_tool(report, input, BTN_TOOL_RUBBER);
else if (report->tool != BTN_TOOL_RUBBER)
/* value is off, tool is not rubber, ignore */
return ;
else if (*quirks & HID_QUIRK_NOINVERT &&
!test_bit(BTN_TOUCH, input->key)) {
/*
* There is no invert to release the tool , let hid_input
* send BTN_TOUCH with scancode and release the tool after .
*/
hid_report_release_tool(report, input, BTN_TOOL_RUBBER);
return ;
}
/* let hid-input set BTN_TOUCH */
break ;
case HID_DG_INVERT:
report->tool_active |= !!value;
/*
* If invert is set , we store BTN_TOOL_RUBBER .
*/
if (value)
hid_report_set_tool(report, input, BTN_TOOL_RUBBER);
else if (!report->tool_active)
/* tool_active not set means Invert and Eraser are not set */
hid_report_release_tool(report, input, BTN_TOOL_RUBBER);
/* no further processing */
return ;
case HID_DG_INRANGE:
report->tool_active |= !!value;
if (report->tool_active) {
/*
* if tool is not set but is marked as active ,
* assume ours
*/
if (!report->tool)
report->tool = usage->code;
/* drivers may have changed the value behind our back, resend it */
hid_report_set_tool(report, input, report->tool);
} else {
hid_report_release_tool(report, input, usage->code);
}
/* reset tool_active for the next event */
report->tool_active = false ;
/* no further processing */
return ;
case HID_DG_TIPSWITCH:
report->tool_active |= !!value;
/* if tool is set to RUBBER we should ignore the current value */
if (report->tool == BTN_TOOL_RUBBER)
return ;
break ;
case HID_DG_TIPPRESSURE:
if (*quirks & HID_QUIRK_NOTOUCH) {
int a = field->logical_minimum;
int b = field->logical_maximum;
if (value > a + ((b - a) >> 3 )) {
input_event(input, EV_KEY, BTN_TOUCH, 1 );
report->tool_active = true ;
}
}
break ;
case HID_UP_PID | 0 x83UL: /* Simultaneous Effects Max */
dbg_hid("Maximum Effects - %d\n" ,value);
return ;
case HID_UP_PID | 0 x7fUL:
dbg_hid("PID Pool Report\n" );
return ;
}
switch (usage->type) {
case EV_KEY:
if (usage->code == 0 ) /* Key 0 is "unassigned", not KEY_UNKNOWN */
return ;
break ;
case EV_REL:
if (usage->code == REL_WHEEL_HI_RES ||
usage->code == REL_HWHEEL_HI_RES) {
hidinput_handle_scroll(usage, input, value);
return ;
}
break ;
case EV_ABS:
if ((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 ;
} else if (((*quirks & HID_QUIRK_X_INVERT) && usage->code == ABS_X) ||
((*quirks & HID_QUIRK_Y_INVERT) && usage->code == ABS_Y))
value = field->logical_maximum - value;
break ;
}
/*
* 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
* 0 x31 and 0 x32 ) 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);
static 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 ;
}
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 ret;
u32 len;
__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 bool __hidinput_change_resolution_multipliers(struct hid_device *hid,
struct hid_report *report, bool use_logical_max)
{
struct hid_usage *usage;
bool update_needed = false ;
bool get_report_completed = false ;
int i, j;
if (report->maxfield == 0 )
return false ;
for (i = 0 ; i < report->maxfield; i++) {
__s32 value = use_logical_max ?
report->field[i]->logical_maximum :
report->field[i]->logical_minimum;
/* There is no good reason for a Resolution
* Multiplier to have a count other than 1 .
* Ignore that case .
*/
if (report->field[i]->report_count != 1 )
continue ;
for (j = 0 ; j < report->field[i]->maxusage; j++) {
usage = &report->field[i]->usage[j];
if (usage->hid != HID_GD_RESOLUTION_MULTIPLIER)
continue ;
/*
* If we have more than one feature within this
* report we need to fill in the bits from the
* others before we can overwrite the ones for the
* Resolution Multiplier .
*
* But if we ' re not allowed to read from the device ,
* we just bail . Such a device should not exist
* anyway .
*/
if (!get_report_completed && report->maxfield > 1 ) {
if (hid->quirks & HID_QUIRK_NO_INIT_REPORTS)
return update_needed;
hid_hw_request(hid, report, HID_REQ_GET_REPORT);
hid_hw_wait(hid);
get_report_completed = true ;
}
report->field[i]->value[j] = value;
update_needed = true ;
}
}
return update_needed;
}
static void hidinput_change_resolution_multipliers(struct hid_device *hid)
{
struct hid_report_enum *rep_enum;
struct hid_report *rep;
int ret;
rep_enum = &hid->report_enum[HID_FEATURE_REPORT];
list_for_each_entry(rep, &rep_enum->report_list, list) {
bool update_needed = __hidinput_change_resolution_multipliers(hid,
rep, true );
if (update_needed) {
ret = __hid_request(hid, rep, HID_REQ_SET_REPORT);
if (ret) {
__hidinput_change_resolution_multipliers(hid,
rep, false );
return ;
}
}
}
/* refresh our structs */
hid_setup_resolution_multiplier(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], false );
if (drv->feature_mapping)
drv->feature_mapping(hid, rep->field[i], usage);
}
}
}
static struct hid_input *hidinput_allocate(struct hid_device *hid,
unsigned int application)
{
struct hid_input *hidinput = kzalloc(sizeof (*hidinput), GFP_KERNEL);
struct input_dev *input_dev = input_allocate_device();
const char *suffix = NULL;
size_t suffix_len, name_len;
if (!hidinput || !input_dev)
goto fail;
if ((hid->quirks & HID_QUIRK_INPUT_PER_APP) &&
hid->maxapplication > 1 ) {
switch (application) {
case HID_GD_KEYBOARD:
suffix = "Keyboard" ;
break ;
case HID_GD_KEYPAD:
suffix = "Keypad" ;
break ;
case HID_GD_MOUSE:
suffix = "Mouse" ;
break ;
case HID_DG_PEN:
/*
* yes , there is an issue here :
* DG_PEN - > " Stylus "
* DG_STYLUS - > " Pen "
* But changing this now means users with config snippets
* will have to change it and the test suite will not be happy .
*/
suffix = "Stylus" ;
break ;
case HID_DG_STYLUS:
suffix = "Pen" ;
break ;
case HID_DG_TOUCHSCREEN:
suffix = "Touchscreen" ;
break ;
case HID_DG_TOUCHPAD:
suffix = "Touchpad" ;
break ;
case HID_GD_SYSTEM_CONTROL:
suffix = "System Control" ;
break ;
case HID_CP_CONSUMER_CONTROL:
suffix = "Consumer Control" ;
break ;
case HID_GD_WIRELESS_RADIO_CTLS:
suffix = "Wireless Radio Control" ;
break ;
case HID_GD_SYSTEM_MULTIAXIS:
suffix = "System Multi Axis" ;
break ;
default :
break ;
}
}
if (suffix) {
name_len = strlen(hid->name);
suffix_len = strlen(suffix);
if ((name_len < suffix_len) ||
strcmp(hid->name + name_len - suffix_len, suffix)) {
hidinput->name = kasprintf(GFP_KERNEL, "%s %s" ,
hid->name, suffix);
if (!hidinput->name)
goto fail;
}
}
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 = hidinput->name ? hidinput->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;
hidinput->application = application;
list_add_tail(&hidinput->list, &hid->inputs);
INIT_LIST_HEAD(&hidinput->reports);
return hidinput;
fail:
kfree(hidinput);
input_free_device(input_dev);
hid_err(hid, "Out of memory during hid input probe\n" );
return NULL;
}
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);
kfree(hidinput->name);
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 struct hid_input *hidinput_match_application(struct hid_report *report)
{
struct hid_device *hid = report->device;
struct hid_input *hidinput;
list_for_each_entry(hidinput, &hid->inputs, list) {
if (hidinput->application == report->application)
return hidinput;
/*
* Keep SystemControl and ConsumerControl applications together
* with the main keyboard , if present .
*/
if ((report->application == HID_GD_SYSTEM_CONTROL ||
report->application == HID_CP_CONSUMER_CONTROL) &&
hidinput->application == HID_GD_KEYBOARD) {
return hidinput;
}
}
return NULL;
}
static inline void hidinput_configure_usages(struct hid_input *hidinput,
struct hid_report *report)
{
int i, j, k;
int first_field_index = 0 ;
int slot_collection_index = -1 ;
int prev_collection_index = -1 ;
unsigned int slot_idx = 0 ;
struct hid_field *field;
/*
* First tag all the fields that are part of a slot ,
* a slot needs to have one Contact ID in the collection
*/
for (i = 0 ; i < report->maxfield; i++) {
field = report->field[i];
/* ignore fields without usage */
if (field->maxusage < 1 )
continue ;
/*
* janitoring when collection_index changes
*/
if (prev_collection_index != field->usage->collection_index) {
prev_collection_index = field->usage->collection_index;
first_field_index = i;
}
/*
* if we already found a Contact ID in the collection ,
* tag and continue to the next .
*/
if (slot_collection_index == field->usage->collection_index) {
field->slot_idx = slot_idx;
continue ;
}
/* check if the current field has Contact ID */
for (j = 0 ; j < field->maxusage; j++) {
if (field->usage[j].hid == HID_DG_CONTACTID) {
slot_collection_index = field->usage->collection_index;
slot_idx++;
/*
* mark all previous fields and this one in the
* current collection to be slotted .
*/
for (k = first_field_index; k <= i; k++)
report->field[k]->slot_idx = slot_idx;
break ;
}
}
}
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,
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;
unsigned int application;
int i, k;
INIT_LIST_HEAD(&hid->inputs);
INIT_WORK(&hid->led_work, hidinput_led_worker);
hid->status &= ~HID_STAT_DUP_DETECTED;
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 ;
application = report->application;
/*
* Find the previous hidinput report attached
* to this report id .
*/
if (hid->quirks & HID_QUIRK_MULTI_INPUT)
hidinput = hidinput_match(report);
else if (hid->maxapplication > 1 &&
(hid->quirks & HID_QUIRK_INPUT_PER_APP))
hidinput = hidinput_match_application(report);
if (!hidinput) {
hidinput = hidinput_allocate(hid, application);
if (!hidinput)
goto out_unwind;
}
hidinput_configure_usages(hidinput, report);
if (hid->quirks & HID_QUIRK_MULTI_INPUT)
hidinput->report = report;
list_add_tail(&report->hidinput_list,
&hidinput->reports);
}
}
hidinput_change_resolution_multipliers(hid);
list_for_each_entry_safe(hidinput, next, &hid->inputs, list) {
if (drv->input_configured &&
drv->input_configured(hid, hidinput))
goto out_unwind;
if (!hidinput_has_been_populated(hidinput)) {
/* no need to register an input device not populated */
hidinput_cleanup_hidinput(hid, hidinput);
continue ;
}
if (input_register_device(hidinput->input))
goto out_unwind;
hidinput->registered = true ;
}
if (list_empty(&hid->inputs)) {
hid_dbg(hid, "No inputs registered, leaving\n" );
goto out_unwind;
}
if (hid->status & HID_STAT_DUP_DETECTED)
hid_dbg(hid,
"Some usages could not be mapped, please use HID_QUIRK_INCREMENT_USAGE_ON_DUPLICATE if this is legitimate.\n" );
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->name);
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);
#ifdef CONFIG_HID_KUNIT_TEST
#include "hid-input-test.c"
#endif
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