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(I'm so sorry!) Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel os linux
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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 0xff - 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 == 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;
case ABS_PRESSURE: case ABS_MT_PRESSURE: if (field->unit == HID_UNIT_NEWTON) { /* Convert to grams, 1 newton is 101.97 grams */ prev = physical_extents; physical_extents *= 10197; if (physical_extents < prev) return 0; unit_exponent -= 2; } else if (field->unit != HID_UNIT_GRAM) { 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_STRENGTHstatic 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 */#define HID_BATTERY_QUIRK_DYNAMIC (1 << 4) /* report present only after life signs */
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(BT_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_MAGICTRACKPAD2_USBC), HID_BATTERY_QUIRK_AVOID_QUERY }, { 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_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 }, { HID_I2C_DEVICE(USB_VENDOR_ID_ELAN, I2C_DEVICE_ID_SURFACE_PRO_12IN), HID_BATTERY_QUIRK_IGNORE }, /* * Elan HID touchscreens seem to all report a non present battery, * set HID_BATTERY_QUIRK_IGNORE for all Elan I2C and USB HID devices. */ { HID_I2C_DEVICE(USB_VENDOR_ID_ELAN, HID_ANY_ID), HID_BATTERY_QUIRK_DYNAMIC }, { HID_USB_DEVICE(USB_VENDOR_ID_ELAN, HID_ANY_ID), HID_BATTERY_QUIRK_DYNAMIC }, {}};
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_battery *bat, int value){ if (bat->min < bat->max && value >= bat->min && value <= bat->max) value = ((value - bat->min) * 100) / (bat->max - bat->min);
return value;}
static int hidinput_query_battery_capacity(struct hid_battery *bat){ int ret; /* * The capacity field may not be the first field in the report: some * devices (e.g. the Apple Magic Trackpad 2 over Bluetooth) precede it * with status flags. Read it from its actual byte offset in the report * (report_offset is in bits; the leading byte is the report id). */ int offset = 1 + bat->report_offset / 8; int len = offset + 1;
u8 *buf __free(kfree) = kmalloc(max(len, 4), GFP_KERNEL); if (!buf) return -ENOMEM;
ret = hid_hw_raw_request(bat->dev, bat->report_id, buf, max(len, 4), bat->report_type, HID_REQ_GET_REPORT); if (ret < len) return -ENODATA;
return hidinput_scale_battery_capacity(bat, buf[offset]);}
static int hidinput_get_battery_property(struct power_supply *psy, enum power_supply_property prop, union power_supply_propval *val){ struct hid_battery *bat = power_supply_get_drvdata(psy); struct hid_device *dev = bat->dev; int value; int ret = 0;
switch (prop) { case POWER_SUPPLY_PROP_ONLINE: val->intval = 1; break;
case POWER_SUPPLY_PROP_PRESENT: val->intval = bat->present; break;
case POWER_SUPPLY_PROP_CAPACITY: if (bat->status != HID_BATTERY_REPORTED && !bat->avoid_query) { value = hidinput_query_battery_capacity(bat); if (value < 0) return value; } else { value = bat->capacity; }
val->intval = value; break;
case POWER_SUPPLY_PROP_MODEL_NAME: val->strval = dev->name; break;
case POWER_SUPPLY_PROP_STATUS: if (bat->status != HID_BATTERY_REPORTED && !bat->avoid_query) { value = hidinput_query_battery_capacity(bat); if (value < 0) return value;
bat->capacity = value; bat->status = HID_BATTERY_QUERIED; }
if (bat->status == HID_BATTERY_UNKNOWN) val->intval = POWER_SUPPLY_STATUS_UNKNOWN; else val->intval = bat->charge_status; break;
case POWER_SUPPLY_PROP_SCOPE: val->intval = POWER_SUPPLY_SCOPE_DEVICE; break;
default: ret = -EINVAL; break; }
return ret;}
static struct hid_battery *hidinput_find_battery(struct hid_device *dev, int report_id){ struct hid_battery *bat;
list_for_each_entry(bat, &dev->batteries, list) { if (bat->report_id == report_id) return bat; } return NULL;}
static void hidinput_cleanup_battery(void *res){ struct hid_battery *bat = res;
list_del(&bat->list);}
static int hidinput_setup_battery(struct hid_device *dev, unsigned report_type, struct hid_field *field, bool is_percentage){ struct hid_battery *bat; struct power_supply_desc *psy_desc; struct power_supply_config psy_cfg = { 0 }; unsigned quirks; s32 min, max; int error;
/* Check if battery for this report ID already exists */ if (hidinput_find_battery(dev, field->report->id)) return 0;
quirks = find_battery_quirk(dev);
hid_dbg(dev, "device %x:%x:%x %d quirks %d report_id %d\n", dev->bus, dev->vendor, dev->product, dev->version, quirks, field->report->id);
if (quirks & HID_BATTERY_QUIRK_IGNORE) return 0;
bat = devm_kzalloc(&dev->dev, sizeof(*bat), GFP_KERNEL); if (!bat) return -ENOMEM;
psy_desc = devm_kzalloc(&dev->dev, sizeof(*psy_desc), GFP_KERNEL); if (!psy_desc) { error = -ENOMEM; goto err_free_bat; }
psy_desc->name = devm_kasprintf(&dev->dev, GFP_KERNEL, "hid-%s-battery-%d", strlen(dev->uniq) ? dev->uniq : dev_name(&dev->dev), field->report->id); if (!psy_desc->name) { error = -ENOMEM; goto err_free_desc; }
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;
bat->dev = dev; bat->min = min; bat->max = max; bat->report_type = report_type; bat->report_id = field->report->id; bat->report_offset = field->report_offset; bat->charge_status = POWER_SUPPLY_STATUS_DISCHARGING; bat->status = HID_BATTERY_UNKNOWN;
/* * 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. */ bat->avoid_query = report_type == HID_INPUT_REPORT && field->physical == HID_DG_STYLUS;
if (quirks & HID_BATTERY_QUIRK_AVOID_QUERY) bat->avoid_query = true;
bat->present = (quirks & HID_BATTERY_QUIRK_DYNAMIC) ? false : true;
psy_cfg.drv_data = bat; bat->ps = devm_power_supply_register(&dev->dev, psy_desc, &psy_cfg); if (IS_ERR(bat->ps)) { error = PTR_ERR(bat->ps); hid_warn(dev, "can't register power supply: %d\n", error); goto err_free_name; }
power_supply_powers(bat->ps, &dev->dev); list_add_tail(&bat->list, &dev->batteries);
error = devm_add_action_or_reset(&dev->dev, hidinput_cleanup_battery, bat); if (error) return error;
return 0;
err_free_name: devm_kfree(&dev->dev, psy_desc->name);err_free_desc: devm_kfree(&dev->dev, psy_desc);err_free_bat: devm_kfree(&dev->dev, bat); return error;}
static bool hidinput_update_battery_charge_status(struct hid_battery *bat, unsigned int usage, int value){ switch (usage) { case HID_BAT_CHARGING: bat->charge_status = value ? POWER_SUPPLY_STATUS_CHARGING : POWER_SUPPLY_STATUS_DISCHARGING; return true; }
return false;}
static void hidinput_update_battery(struct hid_device *dev, int report_id, unsigned int usage, int value){ struct hid_battery *bat; int capacity;
bat = hidinput_find_battery(dev, report_id); if (!bat) return;
if (hidinput_update_battery_charge_status(bat, usage, value)) { bat->present = true; power_supply_changed(bat->ps); return; }
if ((usage & HID_USAGE_PAGE) == HID_UP_DIGITIZER && value == 0) return;
if (value < bat->min || value > bat->max) return;
capacity = hidinput_scale_battery_capacity(bat, value);
if (bat->status != HID_BATTERY_REPORTED || capacity != bat->capacity || ktime_after(ktime_get_coarse(), bat->ratelimit_time)) { bat->present = true; bat->capacity = capacity; bat->status = HID_BATTERY_REPORTED; bat->ratelimit_time = ktime_add_ms(ktime_get_coarse(), 30 * 1000); power_supply_changed(bat->ps); }}#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_update_battery(struct hid_device *dev, int report_id, 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 and HAPTIC usages are supported in output fields */ if (field->report_type == HID_OUTPUT_REPORT && (usage->hid & HID_USAGE_PAGE) != HID_UP_LED && (usage->hid & HID_USAGE_PAGE) != HID_UP_HAPTIC) { 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] |= (0xff - 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 <= 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; case HID_CP_CONSUMER_CONTROL: if (hidinput_field_in_collection(device, field, HID_COLLECTION_NAMED_ARRAY, HID_CP_PROGRAMMABLEBUTTONS)) { if (code <= 0x1d) code += KEY_MACRO1; else code += BTN_TRIGGER_HAPPY - 0x1e; 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 & 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; }
if ((usage->hid & 0xf0) == 0x90) { /* 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 & 0xf0) == 0xa0) { /* SystemControl */ switch (usage->hid & 0xf) { case 0x9: map_key_clear(KEY_MICMUTE); break; case 0xa: map_key_clear(KEY_ACCESSIBILITY); break; default: goto ignore; } break; }
if ((usage->hid & 0xf0) == 0xb0) { /* SC - Display */ switch (usage->hid & 0xf) { case 0x05: 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_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_Z: /* HID_GD_Z is mapped to ABS_DISTANCE for stylus/pen */ if (field->flags & HID_MAIN_ITEM_RELATIVE) { map_rel(usage->hid & 0xf); } else { if (field->application == HID_DG_PEN || field->physical == HID_DG_PEN || field->logical == HID_DG_STYLUS || field->physical == HID_DG_STYLUS || field->application == HID_DG_DIGITIZER) map_abs_clear(ABS_DISTANCE); else map_abs_clear(usage->hid & 0xf); } 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 & 0xf); } break; case HID_GD_SLIDER: case HID_GD_DIAL: 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; } goto unknown;
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: if ((field->application & 0xff) == 0x01) /* Digitizer */ __set_bit(INPUT_PROP_POINTER, input->propbit); else if ((field->application & 0xff) == 0x02) /* Pen */ __set_bit(INPUT_PROP_DIRECT, input->propbit);
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) { 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 0x3b: /* Battery Strength */ hidinput_setup_battery(device, HID_INPUT_REPORT, field, false); usage->type = EV_PWR; return;
case 0x3c: /* Invert */ device->quirks &= ~HID_QUIRK_NOINVERT; 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 0x45: /* 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 0x46: /* TabletPick */ case 0x5a: /* SecondaryBarrelSwitch */ map_key_clear(BTN_STYLUS2); break;
case 0x5b: /* TransducerSerialNumber */ case 0x6e: /* TransducerSerialNumber2 */ map_msc(MSC_SERIAL); 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_ASPECT_RATIO); 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 0x076: map_key_clear(KEY_CAMERA_ACCESS_ENABLE); break; case 0x077: map_key_clear(KEY_CAMERA_ACCESS_DISABLE); break; case 0x078: map_key_clear(KEY_CAMERA_ACCESS_TOGGLE); break;
case 0x079: map_key_clear(KEY_KBDILLUMUP); break; case 0x07a: map_key_clear(KEY_KBDILLUMDOWN); break; case 0x07c: map_key_clear(KEY_KBDILLUMTOGGLE); 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 0x0d8: map_key_clear(KEY_DICTATE); break; case 0x0d9: map_key_clear(KEY_EMOJI_PICKER); 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 0x1cb: map_key_clear(KEY_ASSISTANT); break; case 0x1cc: map_key_clear(KEY_ACTION_ON_SELECTION); break; case 0x1cd: map_key_clear(KEY_CONTEXTUAL_INSERT); break; case 0x1ce: map_key_clear(KEY_CONTEXTUAL_QUERY); 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 0x232: map_key_clear(KEY_FULL_SCREEN); break; case 0x233: map_key_clear(KEY_SCROLLUP); break; case 0x234: map_key_clear(KEY_SCROLLDOWN); break; case 0x238: /* AC Pan */ set_bit(REL_HWHEEL, input->relbit); map_rel(REL_HWHEEL_HI_RES); 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 0x29d: map_key_clear(KEY_KBD_LAYOUT_NEXT); break;
case 0x2a2: map_key_clear(KEY_ALL_APPLICATIONS); 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;
case 0x29f: 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 0x020: map_key_clear(KEY_CAMERA_FOCUS); break; case 0x021: 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 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: /* 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, report->id, 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 | 0x83UL: /* Simultaneous Effects Max */ dbg_hid("Maximum Effects - %d\n",value); return;
case HID_UP_PID | 0x7fUL: 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 * 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);
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;
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); u8 *buf __free(kfree) = 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);}
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_obj(*hidinput); 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. */
static bool hid_has_ff_input(struct hid_device *hdev){ struct hid_input *hidinput;
list_for_each_entry(hidinput, &hdev->inputs, list) { if (test_bit(EV_FF, hidinput->input->evbit)) return true; }
return false;}
int hidinput_connect(struct hid_device *hid, unsigned int connect_mask){ 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 (!(connect_mask & HID_CONNECT_HIDINPUT_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 (list_is_first(&hidinput->list, &hid->inputs) && (connect_mask & HID_CONNECT_FF) && hid->ff_init && !hid_has_ff_input(hid)) hid->ff_init(hid);
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;
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);
void hidinput_reset_resume(struct hid_device *hid){ /* renegotiate host-device shared state after reset */ hidinput_change_resolution_multipliers(hid);}EXPORT_SYMBOL_GPL(hidinput_reset_resume);
#ifdef CONFIG_HID_KUNIT_TEST#include "hid-input-test.c"#endif