// SPDX-License-Identifier: GPL-2.0-or-later /* * HID driver for multitouch panels * * Copyright (c) 2010-2012 Stephane Chatty <[email protected]> * Copyright (c) 2010-2013 Benjamin Tissoires <[email protected]> * Copyright (c) 2010-2012 Ecole Nationale de l'Aviation Civile, France * Copyright (c) 2012-2013 Red Hat, Inc * * This code is partly based on hid-egalax.c: * * Copyright (c) 2010 Stephane Chatty <[email protected]> * Copyright (c) 2010 Henrik Rydberg <[email protected]> * Copyright (c) 2010 Canonical, Ltd. * * This code is partly based on hid-3m-pct.c: * * Copyright (c) 2009-2010 Stephane Chatty <[email protected]> * Copyright (c) 2010 Henrik Rydberg <[email protected]> * Copyright (c) 2010 Canonical, Ltd. */ /* */ /* * This driver is regularly tested thanks to the test suite in hid-tools[1]. * Please run these regression tests before patching this module so that * your patch won't break existing known devices. * * [1] https://gitlab.freedesktop.org/libevdev/hid-tools */ #include <linux/device.h> #include <linux/hid.h> #include <linux/module.h> #include <linux/slab.h> #include <linux/input/mt.h> #include <linux/jiffies.h> #include <linux/string.h> #include <linux/timer.h> MODULE_AUTHOR(…) …; MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …; #include "hid-ids.h" /* quirks to control the device */ #define MT_QUIRK_NOT_SEEN_MEANS_UP … #define MT_QUIRK_SLOT_IS_CONTACTID … #define MT_QUIRK_CYPRESS … #define MT_QUIRK_SLOT_IS_CONTACTNUMBER … #define MT_QUIRK_ALWAYS_VALID … #define MT_QUIRK_VALID_IS_INRANGE … #define MT_QUIRK_VALID_IS_CONFIDENCE … #define MT_QUIRK_CONFIDENCE … #define MT_QUIRK_SLOT_IS_CONTACTID_MINUS_ONE … #define MT_QUIRK_NO_AREA … #define MT_QUIRK_IGNORE_DUPLICATES … #define MT_QUIRK_HOVERING … #define MT_QUIRK_CONTACT_CNT_ACCURATE … #define MT_QUIRK_FORCE_GET_FEATURE … #define MT_QUIRK_FIX_CONST_CONTACT_ID … #define MT_QUIRK_TOUCH_SIZE_SCALING … #define MT_QUIRK_STICKY_FINGERS … #define MT_QUIRK_ASUS_CUSTOM_UP … #define MT_QUIRK_WIN8_PTP_BUTTONS … #define MT_QUIRK_SEPARATE_APP_REPORT … #define MT_QUIRK_FORCE_MULTI_INPUT … #define MT_QUIRK_DISABLE_WAKEUP … #define MT_QUIRK_ORIENTATION_INVERT … #define MT_INPUTMODE_TOUCHSCREEN … #define MT_INPUTMODE_TOUCHPAD … #define MT_BUTTONTYPE_CLICKPAD … enum latency_mode { … }; #define MT_IO_FLAGS_RUNNING … #define MT_IO_FLAGS_ACTIVE_SLOTS … #define MT_IO_FLAGS_PENDING_SLOTS … static const bool mtrue = …; /* default for true */ static const bool mfalse; /* default for false */ static const __s32 mzero; /* default for 0 */ #define DEFAULT_TRUE … #define DEFAULT_FALSE … #define DEFAULT_ZERO … struct mt_usages { … }; struct mt_application { … }; struct mt_class { … }; struct mt_report_data { … }; struct mt_device { … }; static void mt_post_parse_default_settings(struct mt_device *td, struct mt_application *app); static void mt_post_parse(struct mt_device *td, struct mt_application *app); /* classes of device behavior */ #define MT_CLS_DEFAULT … #define MT_CLS_SERIAL … #define MT_CLS_CONFIDENCE … #define MT_CLS_CONFIDENCE_CONTACT_ID … #define MT_CLS_CONFIDENCE_MINUS_ONE … #define MT_CLS_DUAL_INRANGE_CONTACTID … #define MT_CLS_DUAL_INRANGE_CONTACTNUMBER … /* reserved 0x0008 */ #define MT_CLS_INRANGE_CONTACTNUMBER … #define MT_CLS_NSMU … /* reserved 0x0010 */ /* reserved 0x0011 */ #define MT_CLS_WIN_8 … #define MT_CLS_EXPORT_ALL_INPUTS … /* reserved 0x0014 */ #define MT_CLS_WIN_8_FORCE_MULTI_INPUT … #define MT_CLS_WIN_8_DISABLE_WAKEUP … #define MT_CLS_WIN_8_NO_STICKY_FINGERS … #define MT_CLS_WIN_8_FORCE_MULTI_INPUT_NSMU … /* vendor specific classes */ #define MT_CLS_3M … /* reserved 0x0102 */ #define MT_CLS_EGALAX … #define MT_CLS_EGALAX_SERIAL … #define MT_CLS_TOPSEED … #define MT_CLS_PANASONIC … #define MT_CLS_FLATFROG … #define MT_CLS_GENERALTOUCH_TWOFINGERS … #define MT_CLS_GENERALTOUCH_PWT_TENFINGERS … #define MT_CLS_LG … #define MT_CLS_ASUS … #define MT_CLS_VTL … #define MT_CLS_GOOGLE … #define MT_CLS_RAZER_BLADE_STEALTH … #define MT_CLS_SMART_TECH … #define MT_DEFAULT_MAXCONTACT … #define MT_MAX_MAXCONTACT … /* * Resync device and local timestamps after that many microseconds without * receiving data. */ #define MAX_TIMESTAMP_INTERVAL … #define MT_USB_DEVICE(v, p) … #define MT_BT_DEVICE(v, p) … /* * these device-dependent functions determine what slot corresponds * to a valid contact that was just read. */ static int cypress_compute_slot(struct mt_application *application, struct mt_usages *slot) { … } static const struct mt_class mt_classes[] = …; static ssize_t mt_show_quirks(struct device *dev, struct device_attribute *attr, char *buf) { … } static ssize_t mt_set_quirks(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { … } static DEVICE_ATTR(quirks, S_IWUSR | S_IRUGO, mt_show_quirks, mt_set_quirks); static struct attribute *sysfs_attrs[] = …; static const struct attribute_group mt_attribute_group = …; static void mt_get_feature(struct hid_device *hdev, struct hid_report *report) { … } static void mt_feature_mapping(struct hid_device *hdev, struct hid_field *field, struct hid_usage *usage) { … } static void set_abs(struct input_dev *input, unsigned int code, struct hid_field *field, int snratio) { … } static struct mt_usages *mt_allocate_usage(struct hid_device *hdev, struct mt_application *application) { … } static struct mt_application *mt_allocate_application(struct mt_device *td, struct hid_report *report) { … } static struct mt_application *mt_find_application(struct mt_device *td, struct hid_report *report) { … } static struct mt_report_data *mt_allocate_report_data(struct mt_device *td, struct hid_report *report) { … } static struct mt_report_data *mt_find_report_data(struct mt_device *td, struct hid_report *report) { … } static void mt_store_field(struct hid_device *hdev, struct mt_application *application, __s32 *value, size_t offset) { … } #define MT_STORE_FIELD(__name) … static int mt_touch_input_mapping(struct hid_device *hdev, struct hid_input *hi, struct hid_field *field, struct hid_usage *usage, unsigned long **bit, int *max, struct mt_application *app) { … } static int mt_compute_slot(struct mt_device *td, struct mt_application *app, struct mt_usages *slot, struct input_dev *input) { … } static void mt_release_pending_palms(struct mt_device *td, struct mt_application *app, struct input_dev *input) { … } /* * this function is called when a whole packet has been received and processed, * so that it can decide what to send to the input layer. */ static void mt_sync_frame(struct mt_device *td, struct mt_application *app, struct input_dev *input) { … } static int mt_compute_timestamp(struct mt_application *app, __s32 value) { … } static int mt_touch_event(struct hid_device *hid, struct hid_field *field, struct hid_usage *usage, __s32 value) { … } static int mt_process_slot(struct mt_device *td, struct input_dev *input, struct mt_application *app, struct mt_usages *slot) { … } static void mt_process_mt_event(struct hid_device *hid, struct mt_application *app, struct hid_field *field, struct hid_usage *usage, __s32 value, bool first_packet) { … } static void mt_touch_report(struct hid_device *hid, struct mt_report_data *rdata) { … } static int mt_touch_input_configured(struct hid_device *hdev, struct hid_input *hi, struct mt_application *app) { … } #define mt_map_key_clear(c) … static int mt_input_mapping(struct hid_device *hdev, struct hid_input *hi, struct hid_field *field, struct hid_usage *usage, unsigned long **bit, int *max) { … } static int mt_input_mapped(struct hid_device *hdev, struct hid_input *hi, struct hid_field *field, struct hid_usage *usage, unsigned long **bit, int *max) { … } static int mt_event(struct hid_device *hid, struct hid_field *field, struct hid_usage *usage, __s32 value) { … } static void mt_report(struct hid_device *hid, struct hid_report *report) { … } static bool mt_need_to_apply_feature(struct hid_device *hdev, struct hid_field *field, struct hid_usage *usage, enum latency_mode latency, bool surface_switch, bool button_switch, bool *inputmode_found) { … } static void mt_set_modes(struct hid_device *hdev, enum latency_mode latency, bool surface_switch, bool button_switch) { … } static void mt_post_parse_default_settings(struct mt_device *td, struct mt_application *app) { … } static void mt_post_parse(struct mt_device *td, struct mt_application *app) { … } static int mt_input_configured(struct hid_device *hdev, struct hid_input *hi) { … } static void mt_fix_const_field(struct hid_field *field, unsigned int usage) { … } static void mt_fix_const_fields(struct hid_device *hdev, unsigned int usage) { … } static void mt_release_contacts(struct hid_device *hid) { … } static void mt_expired_timeout(struct timer_list *t) { … } static int mt_probe(struct hid_device *hdev, const struct hid_device_id *id) { … } static int mt_suspend(struct hid_device *hdev, pm_message_t state) { … } static int mt_reset_resume(struct hid_device *hdev) { … } static int mt_resume(struct hid_device *hdev) { … } static void mt_remove(struct hid_device *hdev) { … } /* * This list contains only: * - VID/PID of products not working with the default multitouch handling * - 2 generic rules. * So there is no point in adding here any device with MT_CLS_DEFAULT. */ static const struct hid_device_id mt_devices[] = …; MODULE_DEVICE_TABLE(hid, mt_devices); static const struct hid_usage_id mt_grabbed_usages[] = …; static struct hid_driver mt_driver = …; module_hid_driver(…) …;
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