// 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; Lines 1–500 of 2483. 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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_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 */ #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;