drivers/hid/hid-multitouch.c

0001 // SPDX-License-Identifier: GPL-2.0-or-later
0002 /*
0003  *  HID driver for multitouch panels
0004  *
0005  *  Copyright (c) 2010-2012 Stephane Chatty <chatty@enac.fr>
0006  *  Copyright (c) 2010-2013 Benjamin Tissoires <benjamin.tissoires@gmail.com>
0007  *  Copyright (c) 2010-2012 Ecole Nationale de l'Aviation Civile, France
0008  *  Copyright (c) 2012-2013 Red Hat, Inc
0009  *
0010  *  This code is partly based on hid-egalax.c:
0011  *
0012  *  Copyright (c) 2010 Stephane Chatty <chatty@enac.fr>
0013  *  Copyright (c) 2010 Henrik Rydberg <rydberg@euromail.se>
0014  *  Copyright (c) 2010 Canonical, Ltd.
0015  *
0016  *  This code is partly based on hid-3m-pct.c:
0017  *
0018  *  Copyright (c) 2009-2010 Stephane Chatty <chatty@enac.fr>
0019  *  Copyright (c) 2010      Henrik Rydberg <rydberg@euromail.se>
0020  *  Copyright (c) 2010      Canonical, Ltd.
0021  */
0022
0023 /*
0024  */
0025
0026 /*
0027  * This driver is regularly tested thanks to the test suite in hid-tools[1].
0028  * Please run these regression tests before patching this module so that
0029  * your patch won't break existing known devices.
0030  *
0031  * [1] https://gitlab.freedesktop.org/libevdev/hid-tools
0032  */
0033
0034 #include <linux/device.h>
0035 #include <linux/hid.h>
0036 #include <linux/module.h>
0037 #include <linux/slab.h>
0038 #include <linux/input/mt.h>
0039 #include <linux/jiffies.h>
0040 #include <linux/string.h>
0041 #include <linux/timer.h>
0042
0043
0044 MODULE_AUTHOR("Stephane Chatty <chatty@enac.fr>");
0045 MODULE_AUTHOR("Benjamin Tissoires <benjamin.tissoires@gmail.com>");
0046 MODULE_DESCRIPTION("HID multitouch panels");
0047 MODULE_LICENSE("GPL");
0048
0049 #include "hid-ids.h"
0050
0051 /* quirks to control the device */
0052 #define MT_QUIRK_NOT_SEEN_MEANS_UP  BIT(0)
0053 #define MT_QUIRK_SLOT_IS_CONTACTID  BIT(1)
0054 #define MT_QUIRK_CYPRESS        BIT(2)
0055 #define MT_QUIRK_SLOT_IS_CONTACTNUMBER  BIT(3)
0056 #define MT_QUIRK_ALWAYS_VALID       BIT(4)
0057 #define MT_QUIRK_VALID_IS_INRANGE   BIT(5)
0058 #define MT_QUIRK_VALID_IS_CONFIDENCE    BIT(6)
0059 #define MT_QUIRK_CONFIDENCE     BIT(7)
0060 #define MT_QUIRK_SLOT_IS_CONTACTID_MINUS_ONE    BIT(8)
0061 #define MT_QUIRK_NO_AREA        BIT(9)
0062 #define MT_QUIRK_IGNORE_DUPLICATES  BIT(10)
0063 #define MT_QUIRK_HOVERING       BIT(11)
0064 #define MT_QUIRK_CONTACT_CNT_ACCURATE   BIT(12)
0065 #define MT_QUIRK_FORCE_GET_FEATURE  BIT(13)
0066 #define MT_QUIRK_FIX_CONST_CONTACT_ID   BIT(14)
0067 #define MT_QUIRK_TOUCH_SIZE_SCALING BIT(15)
0068 #define MT_QUIRK_STICKY_FINGERS     BIT(16)
0069 #define MT_QUIRK_ASUS_CUSTOM_UP     BIT(17)
0070 #define MT_QUIRK_WIN8_PTP_BUTTONS   BIT(18)
0071 #define MT_QUIRK_SEPARATE_APP_REPORT    BIT(19)
0072 #define MT_QUIRK_FORCE_MULTI_INPUT  BIT(20)
0073 #define MT_QUIRK_DISABLE_WAKEUP     BIT(21)
0074
0075 #define MT_INPUTMODE_TOUCHSCREEN    0x02
0076 #define MT_INPUTMODE_TOUCHPAD       0x03
0077
0078 #define MT_BUTTONTYPE_CLICKPAD      0
0079
0080 enum latency_mode {
0081     HID_LATENCY_NORMAL = 0,
0082     HID_LATENCY_HIGH = 1,
0083 };
0084
0085 #define MT_IO_FLAGS_RUNNING     0
0086 #define MT_IO_FLAGS_ACTIVE_SLOTS    1
0087 #define MT_IO_FLAGS_PENDING_SLOTS   2
0088
0089 static const bool mtrue = true;     /* default for true */
0090 static const bool mfalse;       /* default for false */
0091 static const __s32 mzero;       /* default for 0 */
0092
0093 #define DEFAULT_TRUE    ((void *)&mtrue)
0094 #define DEFAULT_FALSE   ((void *)&mfalse)
0095 #define DEFAULT_ZERO    ((void *)&mzero)
0096
0097 struct mt_usages {
0098     struct list_head list;
0099     __s32 *x, *y, *cx, *cy, *p, *w, *h, *a;
0100     __s32 *contactid;   /* the device ContactID assigned to this slot */
0101     bool *tip_state;    /* is the touch valid? */
0102     bool *inrange_state;    /* is the finger in proximity of the sensor? */
0103     bool *confidence_state; /* is the touch made by a finger? */
0104 };
0105
0106 struct mt_application {
0107     struct list_head list;
0108     unsigned int application;
0109     unsigned int report_id;
0110     struct list_head mt_usages; /* mt usages list */
0111
0112     __s32 quirks;
0113
0114     __s32 *scantime;        /* scantime reported */
0115     __s32 scantime_logical_max; /* max value for raw scantime */
0116
0117     __s32 *raw_cc;          /* contact count in the report */
0118     int left_button_state;      /* left button state */
0119     unsigned int mt_flags;      /* flags to pass to input-mt */
0120
0121     unsigned long *pending_palm_slots;  /* slots where we reported palm
0122                          * and need to release */
0123
0124     __u8 num_received;  /* how many contacts we received */
0125     __u8 num_expected;  /* expected last contact index */
0126     __u8 buttons_count; /* number of physical buttons per touchpad */
0127     __u8 touches_by_report; /* how many touches are present in one report:
0128                  * 1 means we should use a serial protocol
0129                  * > 1 means hybrid (multitouch) protocol
0130                  */
0131
0132     __s32 dev_time;     /* the scan time provided by the device */
0133     unsigned long jiffies;  /* the frame's jiffies */
0134     int timestamp;      /* the timestamp to be sent */
0135     int prev_scantime;      /* scantime reported previously */
0136
0137     bool have_contact_count;
0138 };
0139
0140 struct mt_class {
0141     __s32 name; /* MT_CLS */
0142     __s32 quirks;
0143     __s32 sn_move;  /* Signal/noise ratio for move events */
0144     __s32 sn_width; /* Signal/noise ratio for width events */
0145     __s32 sn_height;    /* Signal/noise ratio for height events */
0146     __s32 sn_pressure;  /* Signal/noise ratio for pressure events */
0147     __u8 maxcontacts;
0148     bool is_indirect;   /* true for touchpads */
0149     bool export_all_inputs; /* do not ignore mouse, keyboards, etc... */
0150 };
0151
0152 struct mt_report_data {
0153     struct list_head list;
0154     struct hid_report *report;
0155     struct mt_application *application;
0156     bool is_mt_collection;
0157 };
0158
0159 struct mt_device {
0160     struct mt_class mtclass;    /* our mt device class */
0161     struct timer_list release_timer;    /* to release sticky fingers */
0162     struct hid_device *hdev;    /* hid_device we're attached to */
0163     unsigned long mt_io_flags;  /* mt flags (MT_IO_FLAGS_*) */
0164     __u8 inputmode_value;   /* InputMode HID feature value */
0165     __u8 maxcontacts;
0166     bool is_buttonpad;  /* is this device a button pad? */
0167     bool serial_maybe;  /* need to check for serial protocol */
0168
0169     struct list_head applications;
0170     struct list_head reports;
0171 };
0172
0173 static void mt_post_parse_default_settings(struct mt_device *td,
0174                        struct mt_application *app);
0175 static void mt_post_parse(struct mt_device *td, struct mt_application *app);
0176
0177 /* classes of device behavior */
0178 #define MT_CLS_DEFAULT              0x0001
0179
0180 #define MT_CLS_SERIAL               0x0002
0181 #define MT_CLS_CONFIDENCE           0x0003
0182 #define MT_CLS_CONFIDENCE_CONTACT_ID        0x0004
0183 #define MT_CLS_CONFIDENCE_MINUS_ONE     0x0005
0184 #define MT_CLS_DUAL_INRANGE_CONTACTID       0x0006
0185 #define MT_CLS_DUAL_INRANGE_CONTACTNUMBER   0x0007
0186 /* reserved                 0x0008 */
0187 #define MT_CLS_INRANGE_CONTACTNUMBER        0x0009
0188 #define MT_CLS_NSMU             0x000a
0189 /* reserved                 0x0010 */
0190 /* reserved                 0x0011 */
0191 #define MT_CLS_WIN_8                0x0012
0192 #define MT_CLS_EXPORT_ALL_INPUTS        0x0013
0193 /* reserved                 0x0014 */
0194 #define MT_CLS_WIN_8_FORCE_MULTI_INPUT      0x0015
0195 #define MT_CLS_WIN_8_DISABLE_WAKEUP     0x0016
0196 #define MT_CLS_WIN_8_NO_STICKY_FINGERS      0x0017
0197 #define MT_CLS_WIN_8_FORCE_MULTI_INPUT_NSMU 0x0018
0198
0199 /* vendor specific classes */
0200 #define MT_CLS_3M               0x0101
0201 /* reserved                 0x0102 */
0202 #define MT_CLS_EGALAX               0x0103
0203 #define MT_CLS_EGALAX_SERIAL            0x0104
0204 #define MT_CLS_TOPSEED              0x0105
0205 #define MT_CLS_PANASONIC            0x0106
0206 #define MT_CLS_FLATFROG             0x0107
0207 #define MT_CLS_GENERALTOUCH_TWOFINGERS      0x0108
0208 #define MT_CLS_GENERALTOUCH_PWT_TENFINGERS  0x0109
0209 #define MT_CLS_LG               0x010a
0210 #define MT_CLS_ASUS             0x010b
0211 #define MT_CLS_VTL              0x0110
0212 #define MT_CLS_GOOGLE               0x0111
0213 #define MT_CLS_RAZER_BLADE_STEALTH      0x0112
0214 #define MT_CLS_SMART_TECH           0x0113
0215
0216 #define MT_DEFAULT_MAXCONTACT   10
0217 #define MT_MAX_MAXCONTACT   250
0218
0219 /*
0220  * Resync device and local timestamps after that many microseconds without
0221  * receiving data.
0222  */
0223 #define MAX_TIMESTAMP_INTERVAL  1000000
0224
0225 #define MT_USB_DEVICE(v, p) HID_DEVICE(BUS_USB, HID_GROUP_MULTITOUCH, v, p)
0226 #define MT_BT_DEVICE(v, p)  HID_DEVICE(BUS_BLUETOOTH, HID_GROUP_MULTITOUCH, v, p)
0227
0228 /*
0229  * these device-dependent functions determine what slot corresponds
0230  * to a valid contact that was just read.
0231  */
0232
0233 static int cypress_compute_slot(struct mt_application *application,
0234                 struct mt_usages *slot)
0235 {
0236     if (*slot->contactid != 0 || application->num_received == 0)
0237         return *slot->contactid;
0238     else
0239         return -1;
0240 }
0241
0242 static const struct mt_class mt_classes[] = {
0243     { .name = MT_CLS_DEFAULT,
0244         .quirks = MT_QUIRK_ALWAYS_VALID |
0245             MT_QUIRK_CONTACT_CNT_ACCURATE },
0246     { .name = MT_CLS_NSMU,
0247         .quirks = MT_QUIRK_NOT_SEEN_MEANS_UP },
0248     { .name = MT_CLS_SERIAL,
0249         .quirks = MT_QUIRK_ALWAYS_VALID},
0250     { .name = MT_CLS_CONFIDENCE,
0251         .quirks = MT_QUIRK_VALID_IS_CONFIDENCE },
0252     { .name = MT_CLS_CONFIDENCE_CONTACT_ID,
0253         .quirks = MT_QUIRK_VALID_IS_CONFIDENCE |
0254             MT_QUIRK_SLOT_IS_CONTACTID },
0255     { .name = MT_CLS_CONFIDENCE_MINUS_ONE,
0256         .quirks = MT_QUIRK_VALID_IS_CONFIDENCE |
0257             MT_QUIRK_SLOT_IS_CONTACTID_MINUS_ONE },
0258     { .name = MT_CLS_DUAL_INRANGE_CONTACTID,
0259         .quirks = MT_QUIRK_VALID_IS_INRANGE |
0260             MT_QUIRK_SLOT_IS_CONTACTID,
0261         .maxcontacts = 2 },
0262     { .name = MT_CLS_DUAL_INRANGE_CONTACTNUMBER,
0263         .quirks = MT_QUIRK_VALID_IS_INRANGE |
0264             MT_QUIRK_SLOT_IS_CONTACTNUMBER,
0265         .maxcontacts = 2 },
0266     { .name = MT_CLS_INRANGE_CONTACTNUMBER,
0267         .quirks = MT_QUIRK_VALID_IS_INRANGE |
0268             MT_QUIRK_SLOT_IS_CONTACTNUMBER },
0269     { .name = MT_CLS_WIN_8,
0270         .quirks = MT_QUIRK_ALWAYS_VALID |
0271             MT_QUIRK_IGNORE_DUPLICATES |
0272             MT_QUIRK_HOVERING |
0273             MT_QUIRK_CONTACT_CNT_ACCURATE |
0274             MT_QUIRK_STICKY_FINGERS |
0275             MT_QUIRK_WIN8_PTP_BUTTONS,
0276         .export_all_inputs = true },
0277     { .name = MT_CLS_EXPORT_ALL_INPUTS,
0278         .quirks = MT_QUIRK_ALWAYS_VALID |
0279             MT_QUIRK_CONTACT_CNT_ACCURATE,
0280         .export_all_inputs = true },
0281     { .name = MT_CLS_WIN_8_FORCE_MULTI_INPUT,
0282         .quirks = MT_QUIRK_ALWAYS_VALID |
0283             MT_QUIRK_IGNORE_DUPLICATES |
0284             MT_QUIRK_HOVERING |
0285             MT_QUIRK_CONTACT_CNT_ACCURATE |
0286             MT_QUIRK_STICKY_FINGERS |
0287             MT_QUIRK_WIN8_PTP_BUTTONS |
0288             MT_QUIRK_FORCE_MULTI_INPUT,
0289         .export_all_inputs = true },
0290     { .name = MT_CLS_WIN_8_FORCE_MULTI_INPUT_NSMU,
0291         .quirks = MT_QUIRK_IGNORE_DUPLICATES |
0292             MT_QUIRK_HOVERING |
0293             MT_QUIRK_CONTACT_CNT_ACCURATE |
0294             MT_QUIRK_STICKY_FINGERS |
0295             MT_QUIRK_WIN8_PTP_BUTTONS |
0296             MT_QUIRK_FORCE_MULTI_INPUT |
0297             MT_QUIRK_NOT_SEEN_MEANS_UP,
0298         .export_all_inputs = true },
0299     { .name = MT_CLS_WIN_8_DISABLE_WAKEUP,
0300         .quirks = MT_QUIRK_ALWAYS_VALID |
0301             MT_QUIRK_IGNORE_DUPLICATES |
0302             MT_QUIRK_HOVERING |
0303             MT_QUIRK_CONTACT_CNT_ACCURATE |
0304             MT_QUIRK_STICKY_FINGERS |
0305             MT_QUIRK_WIN8_PTP_BUTTONS |
0306             MT_QUIRK_DISABLE_WAKEUP,
0307         .export_all_inputs = true },
0308     { .name = MT_CLS_WIN_8_NO_STICKY_FINGERS,
0309         .quirks = MT_QUIRK_ALWAYS_VALID |
0310             MT_QUIRK_IGNORE_DUPLICATES |
0311             MT_QUIRK_HOVERING |
0312             MT_QUIRK_CONTACT_CNT_ACCURATE |
0313             MT_QUIRK_WIN8_PTP_BUTTONS,
0314         .export_all_inputs = true },
0315
0316     /*
0317      * vendor specific classes
0318      */
0319     { .name = MT_CLS_3M,
0320         .quirks = MT_QUIRK_VALID_IS_CONFIDENCE |
0321             MT_QUIRK_SLOT_IS_CONTACTID |
0322             MT_QUIRK_TOUCH_SIZE_SCALING,
0323         .sn_move = 2048,
0324         .sn_width = 128,
0325         .sn_height = 128,
0326         .maxcontacts = 60,
0327     },
0328     { .name = MT_CLS_EGALAX,
0329         .quirks =  MT_QUIRK_SLOT_IS_CONTACTID |
0330             MT_QUIRK_VALID_IS_INRANGE,
0331         .sn_move = 4096,
0332         .sn_pressure = 32,
0333     },
0334     { .name = MT_CLS_EGALAX_SERIAL,
0335         .quirks =  MT_QUIRK_SLOT_IS_CONTACTID |
0336             MT_QUIRK_ALWAYS_VALID,
0337         .sn_move = 4096,
0338         .sn_pressure = 32,
0339     },
0340     { .name = MT_CLS_TOPSEED,
0341         .quirks = MT_QUIRK_ALWAYS_VALID,
0342         .is_indirect = true,
0343         .maxcontacts = 2,
0344     },
0345     { .name = MT_CLS_PANASONIC,
0346         .quirks = MT_QUIRK_NOT_SEEN_MEANS_UP,
0347         .maxcontacts = 4 },
0348     { .name = MT_CLS_GENERALTOUCH_TWOFINGERS,
0349         .quirks = MT_QUIRK_NOT_SEEN_MEANS_UP |
0350             MT_QUIRK_VALID_IS_INRANGE |
0351             MT_QUIRK_SLOT_IS_CONTACTID,
0352         .maxcontacts = 2
0353     },
0354     { .name = MT_CLS_GENERALTOUCH_PWT_TENFINGERS,
0355         .quirks = MT_QUIRK_NOT_SEEN_MEANS_UP |
0356             MT_QUIRK_SLOT_IS_CONTACTID
0357     },
0358
0359     { .name = MT_CLS_FLATFROG,
0360         .quirks = MT_QUIRK_NOT_SEEN_MEANS_UP |
0361             MT_QUIRK_NO_AREA,
0362         .sn_move = 2048,
0363         .maxcontacts = 40,
0364     },
0365     { .name = MT_CLS_LG,
0366         .quirks = MT_QUIRK_ALWAYS_VALID |
0367             MT_QUIRK_FIX_CONST_CONTACT_ID |
0368             MT_QUIRK_IGNORE_DUPLICATES |
0369             MT_QUIRK_HOVERING |
0370             MT_QUIRK_CONTACT_CNT_ACCURATE },
0371     { .name = MT_CLS_ASUS,
0372         .quirks = MT_QUIRK_ALWAYS_VALID |
0373             MT_QUIRK_CONTACT_CNT_ACCURATE |
0374             MT_QUIRK_ASUS_CUSTOM_UP },
0375     { .name = MT_CLS_VTL,
0376         .quirks = MT_QUIRK_ALWAYS_VALID |
0377             MT_QUIRK_CONTACT_CNT_ACCURATE |
0378             MT_QUIRK_FORCE_GET_FEATURE,
0379     },
0380     { .name = MT_CLS_GOOGLE,
0381         .quirks = MT_QUIRK_ALWAYS_VALID |
0382             MT_QUIRK_CONTACT_CNT_ACCURATE |
0383             MT_QUIRK_SLOT_IS_CONTACTID |
0384             MT_QUIRK_HOVERING
0385     },
0386     { .name = MT_CLS_RAZER_BLADE_STEALTH,
0387         .quirks = MT_QUIRK_ALWAYS_VALID |
0388             MT_QUIRK_IGNORE_DUPLICATES |
0389             MT_QUIRK_HOVERING |
0390             MT_QUIRK_CONTACT_CNT_ACCURATE |
0391             MT_QUIRK_WIN8_PTP_BUTTONS,
0392     },
0393     { .name = MT_CLS_SMART_TECH,
0394         .quirks = MT_QUIRK_ALWAYS_VALID |
0395             MT_QUIRK_IGNORE_DUPLICATES |
0396             MT_QUIRK_CONTACT_CNT_ACCURATE |
0397             MT_QUIRK_SEPARATE_APP_REPORT,
0398     },
0399     { }
0400 };
0401
0402 static ssize_t mt_show_quirks(struct device *dev,
0403                struct device_attribute *attr,
0404                char *buf)
0405 {
0406     struct hid_device *hdev = to_hid_device(dev);
0407     struct mt_device *td = hid_get_drvdata(hdev);
0408
0409     return sprintf(buf, "%u\n", td->mtclass.quirks);
0410 }
0411
0412 static ssize_t mt_set_quirks(struct device *dev,
0413               struct device_attribute *attr,
0414               const char *buf, size_t count)
0415 {
0416     struct hid_device *hdev = to_hid_device(dev);
0417     struct mt_device *td = hid_get_drvdata(hdev);
0418     struct mt_application *application;
0419
0420     unsigned long val;
0421
0422     if (kstrtoul(buf, 0, &val))
0423         return -EINVAL;
0424
0425     td->mtclass.quirks = val;
0426
0427     list_for_each_entry(application, &td->applications, list) {
0428         application->quirks = val;
0429         if (!application->have_contact_count)
0430             application->quirks &= ~MT_QUIRK_CONTACT_CNT_ACCURATE;
0431     }
0432
0433     return count;
0434 }
0435
0436 static DEVICE_ATTR(quirks, S_IWUSR | S_IRUGO, mt_show_quirks, mt_set_quirks);
0437
0438 static struct attribute *sysfs_attrs[] = {
0439     &dev_attr_quirks.attr,
0440     NULL
0441 };
0442
0443 static const struct attribute_group mt_attribute_group = {
0444     .attrs = sysfs_attrs
0445 };
0446
0447 static void mt_get_feature(struct hid_device *hdev, struct hid_report *report)
0448 {
0449     int ret;
0450     u32 size = hid_report_len(report);
0451     u8 *buf;
0452
0453     /*
0454      * Do not fetch the feature report if the device has been explicitly
0455      * marked as non-capable.
0456      */
0457     if (hdev->quirks & HID_QUIRK_NO_INIT_REPORTS)
0458         return;
0459
0460     buf = hid_alloc_report_buf(report, GFP_KERNEL);
0461     if (!buf)
0462         return;
0463
0464     ret = hid_hw_raw_request(hdev, report->id, buf, size,
0465                  HID_FEATURE_REPORT, HID_REQ_GET_REPORT);
0466     if (ret < 0) {
0467         dev_warn(&hdev->dev, "failed to fetch feature %d\n",
0468              report->id);
0469     } else {
0470         ret = hid_report_raw_event(hdev, HID_FEATURE_REPORT, buf,
0471                        size, 0);
0472         if (ret)
0473             dev_warn(&hdev->dev, "failed to report feature\n");
0474     }
0475
0476     kfree(buf);
0477 }
0478
0479 static void mt_feature_mapping(struct hid_device *hdev,
0480         struct hid_field *field, struct hid_usage *usage)
0481 {
0482     struct mt_device *td = hid_get_drvdata(hdev);
0483
0484     switch (usage->hid) {
0485     case HID_DG_CONTACTMAX:
0486         mt_get_feature(hdev, field->report);
0487
0488         td->maxcontacts = field->value[0];
0489         if (!td->maxcontacts &&
0490             field->logical_maximum <= MT_MAX_MAXCONTACT)
0491             td->maxcontacts = field->logical_maximum;
0492         if (td->mtclass.maxcontacts)
0493             /* check if the maxcontacts is given by the class */
0494             td->maxcontacts = td->mtclass.maxcontacts;
0495
0496         break;
0497     case HID_DG_BUTTONTYPE:
0498         if (usage->usage_index >= field->report_count) {
0499             dev_err(&hdev->dev, "HID_DG_BUTTONTYPE out of range\n");
0500             break;
0501         }
0502
0503         mt_get_feature(hdev, field->report);
0504         if (field->value[usage->usage_index] == MT_BUTTONTYPE_CLICKPAD)
0505             td->is_buttonpad = true;
0506
0507         break;
0508     case 0xff0000c5:
0509         /* Retrieve the Win8 blob once to enable some devices */
0510         if (usage->usage_index == 0)
0511             mt_get_feature(hdev, field->report);
0512         break;
0513     }
0514 }
0515
0516 static void set_abs(struct input_dev *input, unsigned int code,
0517         struct hid_field *field, int snratio)
0518 {
0519     int fmin = field->logical_minimum;
0520     int fmax = field->logical_maximum;
0521     int fuzz = snratio ? (fmax - fmin) / snratio : 0;
0522     input_set_abs_params(input, code, fmin, fmax, fuzz, 0);
0523     input_abs_set_res(input, code, hidinput_calc_abs_res(field, code));
0524 }
0525
0526 static struct mt_usages *mt_allocate_usage(struct hid_device *hdev,
0527                        struct mt_application *application)
0528 {
0529     struct mt_usages *usage;
0530
0531     usage = devm_kzalloc(&hdev->dev, sizeof(*usage), GFP_KERNEL);
0532     if (!usage)
0533         return NULL;
0534
0535     /* set some defaults so we do not need to check for null pointers */
0536     usage->x = DEFAULT_ZERO;
0537     usage->y = DEFAULT_ZERO;
0538     usage->cx = DEFAULT_ZERO;
0539     usage->cy = DEFAULT_ZERO;
0540     usage->p = DEFAULT_ZERO;
0541     usage->w = DEFAULT_ZERO;
0542     usage->h = DEFAULT_ZERO;
0543     usage->a = DEFAULT_ZERO;
0544     usage->contactid = DEFAULT_ZERO;
0545     usage->tip_state = DEFAULT_FALSE;
0546     usage->inrange_state = DEFAULT_FALSE;
0547     usage->confidence_state = DEFAULT_TRUE;
0548
0549     list_add_tail(&usage->list, &application->mt_usages);
0550
0551     return usage;
0552 }
0553
0554 static struct mt_application *mt_allocate_application(struct mt_device *td,
0555                               struct hid_report *report)
0556 {
0557     unsigned int application = report->application;
0558     struct mt_application *mt_application;
0559
0560     mt_application = devm_kzalloc(&td->hdev->dev, sizeof(*mt_application),
0561                       GFP_KERNEL);
0562     if (!mt_application)
0563         return NULL;
0564
0565     mt_application->application = application;
0566     INIT_LIST_HEAD(&mt_application->mt_usages);
0567
0568     if (application == HID_DG_TOUCHSCREEN)
0569         mt_application->mt_flags |= INPUT_MT_DIRECT;
0570
0571     /*
0572      * Model touchscreens providing buttons as touchpads.
0573      */
0574     if (application == HID_DG_TOUCHPAD) {
0575         mt_application->mt_flags |= INPUT_MT_POINTER;
0576         td->inputmode_value = MT_INPUTMODE_TOUCHPAD;
0577     }
0578
0579     mt_application->scantime = DEFAULT_ZERO;
0580     mt_application->raw_cc = DEFAULT_ZERO;
0581     mt_application->quirks = td->mtclass.quirks;
0582     mt_application->report_id = report->id;
0583
0584     list_add_tail(&mt_application->list, &td->applications);
0585
0586     return mt_application;
0587 }
0588
0589 static struct mt_application *mt_find_application(struct mt_device *td,
0590                           struct hid_report *report)
0591 {
0592     unsigned int application = report->application;
0593     struct mt_application *tmp, *mt_application = NULL;
0594
0595     list_for_each_entry(tmp, &td->applications, list) {
0596         if (application == tmp->application) {
0597             if (!(td->mtclass.quirks & MT_QUIRK_SEPARATE_APP_REPORT) ||
0598                 tmp->report_id == report->id) {
0599                 mt_application = tmp;
0600                 break;
0601             }
0602         }
0603     }
0604
0605     if (!mt_application)
0606         mt_application = mt_allocate_application(td, report);
0607
0608     return mt_application;
0609 }
0610
0611 static struct mt_report_data *mt_allocate_report_data(struct mt_device *td,
0612                               struct hid_report *report)
0613 {
0614     struct mt_report_data *rdata;
0615     struct hid_field *field;
0616     int r, n;
0617
0618     rdata = devm_kzalloc(&td->hdev->dev, sizeof(*rdata), GFP_KERNEL);
0619     if (!rdata)
0620         return NULL;
0621
0622     rdata->report = report;
0623     rdata->application = mt_find_application(td, report);
0624
0625     if (!rdata->application) {
0626         devm_kfree(&td->hdev->dev, rdata);
0627         return NULL;
0628     }
0629
0630     for (r = 0; r < report->maxfield; r++) {
0631         field = report->field[r];
0632
0633         if (!(HID_MAIN_ITEM_VARIABLE & field->flags))
0634             continue;
0635
0636         if (field->logical == HID_DG_FINGER || td->hdev->group != HID_GROUP_MULTITOUCH_WIN_8) {
0637             for (n = 0; n < field->report_count; n++) {
0638                 if (field->usage[n].hid == HID_DG_CONTACTID) {
0639                     rdata->is_mt_collection = true;
0640                     break;
0641                 }
0642             }
0643         }
0644     }
0645
0646     list_add_tail(&rdata->list, &td->reports);
0647
0648     return rdata;
0649 }
0650
0651 static struct mt_report_data *mt_find_report_data(struct mt_device *td,
0652                           struct hid_report *report)
0653 {
0654     struct mt_report_data *tmp, *rdata = NULL;
0655
0656     list_for_each_entry(tmp, &td->reports, list) {
0657         if (report == tmp->report) {
0658             rdata = tmp;
0659             break;
0660         }
0661     }
0662
0663     if (!rdata)
0664         rdata = mt_allocate_report_data(td, report);
0665
0666     return rdata;
0667 }
0668
0669 static void mt_store_field(struct hid_device *hdev,
0670                struct mt_application *application,
0671                __s32 *value,
0672                size_t offset)
0673 {
0674     struct mt_usages *usage;
0675     __s32 **target;
0676
0677     if (list_empty(&application->mt_usages))
0678         usage = mt_allocate_usage(hdev, application);
0679     else
0680         usage = list_last_entry(&application->mt_usages,
0681                     struct mt_usages,
0682                     list);
0683
0684     if (!usage)
0685         return;
0686
0687     target = (__s32 **)((char *)usage + offset);
0688
0689     /* the value has already been filled, create a new slot */
0690     if (*target != DEFAULT_TRUE &&
0691         *target != DEFAULT_FALSE &&
0692         *target != DEFAULT_ZERO) {
0693         if (usage->contactid == DEFAULT_ZERO ||
0694             usage->x == DEFAULT_ZERO ||
0695             usage->y == DEFAULT_ZERO) {
0696             hid_dbg(hdev,
0697                 "ignoring duplicate usage on incomplete");
0698             return;
0699         }
0700         usage = mt_allocate_usage(hdev, application);
0701         if (!usage)
0702             return;
0703
0704         target = (__s32 **)((char *)usage + offset);
0705     }
0706
0707     *target = value;
0708 }
0709
0710 #define MT_STORE_FIELD(__name)                      \
0711     mt_store_field(hdev, app,                   \
0712                &field->value[usage->usage_index],       \
0713                offsetof(struct mt_usages, __name))
0714
0715 static int mt_touch_input_mapping(struct hid_device *hdev, struct hid_input *hi,
0716         struct hid_field *field, struct hid_usage *usage,
0717         unsigned long **bit, int *max, struct mt_application *app)
0718 {
0719     struct mt_device *td = hid_get_drvdata(hdev);
0720     struct mt_class *cls = &td->mtclass;
0721     int code;
0722     struct hid_usage *prev_usage = NULL;
0723
0724     /*
0725      * Model touchscreens providing buttons as touchpads.
0726      */
0727     if (field->application == HID_DG_TOUCHSCREEN &&
0728         (usage->hid & HID_USAGE_PAGE) == HID_UP_BUTTON) {
0729         app->mt_flags |= INPUT_MT_POINTER;
0730         td->inputmode_value = MT_INPUTMODE_TOUCHPAD;
0731     }
0732
0733     /* count the buttons on touchpads */
0734     if ((usage->hid & HID_USAGE_PAGE) == HID_UP_BUTTON)
0735         app->buttons_count++;
0736
0737     if (usage->usage_index)
0738         prev_usage = &field->usage[usage->usage_index - 1];
0739
0740     switch (usage->hid & HID_USAGE_PAGE) {
0741
0742     case HID_UP_GENDESK:
0743         switch (usage->hid) {
0744         case HID_GD_X:
0745             if (prev_usage && (prev_usage->hid == usage->hid)) {
0746                 code = ABS_MT_TOOL_X;
0747                 MT_STORE_FIELD(cx);
0748             } else {
0749                 code = ABS_MT_POSITION_X;
0750                 MT_STORE_FIELD(x);
0751             }
0752
0753             set_abs(hi->input, code, field, cls->sn_move);
0754
0755             /*
0756              * A system multi-axis that exports X and Y has a high
0757              * chance of being used directly on a surface
0758              */
0759             if (field->application == HID_GD_SYSTEM_MULTIAXIS) {
0760                 __set_bit(INPUT_PROP_DIRECT,
0761                       hi->input->propbit);
0762                 input_set_abs_params(hi->input,
0763                              ABS_MT_TOOL_TYPE,
0764                              MT_TOOL_DIAL,
0765                              MT_TOOL_DIAL, 0, 0);
0766             }
0767
0768             return 1;
0769         case HID_GD_Y:
0770             if (prev_usage && (prev_usage->hid == usage->hid)) {
0771                 code = ABS_MT_TOOL_Y;
0772                 MT_STORE_FIELD(cy);
0773             } else {
0774                 code = ABS_MT_POSITION_Y;
0775                 MT_STORE_FIELD(y);
0776             }
0777
0778             set_abs(hi->input, code, field, cls->sn_move);
0779
0780             return 1;
0781         }
0782         return 0;
0783
0784     case HID_UP_DIGITIZER:
0785         switch (usage->hid) {
0786         case HID_DG_INRANGE:
0787             if (app->quirks & MT_QUIRK_HOVERING) {
0788                 input_set_abs_params(hi->input,
0789                     ABS_MT_DISTANCE, 0, 1, 0, 0);
0790             }
0791             MT_STORE_FIELD(inrange_state);
0792             return 1;
0793         case HID_DG_CONFIDENCE:
0794             if ((cls->name == MT_CLS_WIN_8 ||
0795                  cls->name == MT_CLS_WIN_8_FORCE_MULTI_INPUT ||
0796                  cls->name == MT_CLS_WIN_8_FORCE_MULTI_INPUT_NSMU ||
0797                  cls->name == MT_CLS_WIN_8_DISABLE_WAKEUP) &&
0798                 (field->application == HID_DG_TOUCHPAD ||
0799                  field->application == HID_DG_TOUCHSCREEN))
0800                 app->quirks |= MT_QUIRK_CONFIDENCE;
0801
0802             if (app->quirks & MT_QUIRK_CONFIDENCE)
0803                 input_set_abs_params(hi->input,
0804                              ABS_MT_TOOL_TYPE,
0805                              MT_TOOL_FINGER,
0806                              MT_TOOL_PALM, 0, 0);
0807
0808             MT_STORE_FIELD(confidence_state);
0809             return 1;
0810         case HID_DG_TIPSWITCH:
0811             if (field->application != HID_GD_SYSTEM_MULTIAXIS)
0812                 input_set_capability(hi->input,
0813                              EV_KEY, BTN_TOUCH);
0814             MT_STORE_FIELD(tip_state);
0815             return 1;
0816         case HID_DG_CONTACTID:
0817             MT_STORE_FIELD(contactid);
0818             app->touches_by_report++;
0819             return 1;
0820         case HID_DG_WIDTH:
0821             if (!(app->quirks & MT_QUIRK_NO_AREA))
0822                 set_abs(hi->input, ABS_MT_TOUCH_MAJOR, field,
0823                     cls->sn_width);
0824             MT_STORE_FIELD(w);
0825             return 1;
0826         case HID_DG_HEIGHT:
0827             if (!(app->quirks & MT_QUIRK_NO_AREA)) {
0828                 set_abs(hi->input, ABS_MT_TOUCH_MINOR, field,
0829                     cls->sn_height);
0830
0831                 /*
0832                  * Only set ABS_MT_ORIENTATION if it is not
0833                  * already set by the HID_DG_AZIMUTH usage.
0834                  */
0835                 if (!test_bit(ABS_MT_ORIENTATION,
0836                         hi->input->absbit))
0837                     input_set_abs_params(hi->input,
0838                         ABS_MT_ORIENTATION, 0, 1, 0, 0);
0839             }
0840             MT_STORE_FIELD(h);
0841             return 1;
0842         case HID_DG_TIPPRESSURE:
0843             set_abs(hi->input, ABS_MT_PRESSURE, field,
0844                 cls->sn_pressure);
0845             MT_STORE_FIELD(p);
0846             return 1;
0847         case HID_DG_SCANTIME:
0848             input_set_capability(hi->input, EV_MSC, MSC_TIMESTAMP);
0849             app->scantime = &field->value[usage->usage_index];
0850             app->scantime_logical_max = field->logical_maximum;
0851             return 1;
0852         case HID_DG_CONTACTCOUNT:
0853             app->have_contact_count = true;
0854             app->raw_cc = &field->value[usage->usage_index];
0855             return 1;
0856         case HID_DG_AZIMUTH:
0857             /*
0858              * Azimuth has the range of [0, MAX) representing a full
0859              * revolution. Set ABS_MT_ORIENTATION to a quarter of
0860              * MAX according the definition of ABS_MT_ORIENTATION
0861              */
0862             input_set_abs_params(hi->input, ABS_MT_ORIENTATION,
0863                 -field->logical_maximum / 4,
0864                 field->logical_maximum / 4,
0865                 cls->sn_move ?
0866                 field->logical_maximum / cls->sn_move : 0, 0);
0867             MT_STORE_FIELD(a);
0868             return 1;
0869         case HID_DG_CONTACTMAX:
0870             /* contact max are global to the report */
0871             return -1;
0872         case HID_DG_TOUCH:
0873             /* Legacy devices use TIPSWITCH and not TOUCH.
0874              * Let's just ignore this field. */
0875             return -1;
0876         }
0877         /* let hid-input decide for the others */
0878         return 0;
0879
0880     case HID_UP_BUTTON:
0881         code = BTN_MOUSE + ((usage->hid - 1) & HID_USAGE);
0882         /*
0883          * MS PTP spec says that external buttons left and right have
0884          * usages 2 and 3.
0885          */
0886         if ((app->quirks & MT_QUIRK_WIN8_PTP_BUTTONS) &&
0887             field->application == HID_DG_TOUCHPAD &&
0888             (usage->hid & HID_USAGE) > 1)
0889             code--;
0890
0891         if (field->application == HID_GD_SYSTEM_MULTIAXIS)
0892             code = BTN_0  + ((usage->hid - 1) & HID_USAGE);
0893
0894         hid_map_usage(hi, usage, bit, max, EV_KEY, code);
0895         if (!*bit)
0896             return -1;
0897         input_set_capability(hi->input, EV_KEY, code);
0898         return 1;
0899
0900     case 0xff000000:
0901         /* we do not want to map these: no input-oriented meaning */
0902         return -1;
0903     }
0904
0905     return 0;
0906 }
0907
0908 static int mt_compute_slot(struct mt_device *td, struct mt_application *app,
0909                struct mt_usages *slot,
0910                struct input_dev *input)
0911 {
0912     __s32 quirks = app->quirks;
0913
0914     if (quirks & MT_QUIRK_SLOT_IS_CONTACTID)
0915         return *slot->contactid;
0916
0917     if (quirks & MT_QUIRK_CYPRESS)
0918         return cypress_compute_slot(app, slot);
0919
0920     if (quirks & MT_QUIRK_SLOT_IS_CONTACTNUMBER)
0921         return app->num_received;
0922
0923     if (quirks & MT_QUIRK_SLOT_IS_CONTACTID_MINUS_ONE)
0924         return *slot->contactid - 1;
0925
0926     return input_mt_get_slot_by_key(input, *slot->contactid);
0927 }
0928
0929 static void mt_release_pending_palms(struct mt_device *td,
0930                      struct mt_application *app,
0931                      struct input_dev *input)
0932 {
0933     int slotnum;
0934     bool need_sync = false;
0935
0936     for_each_set_bit(slotnum, app->pending_palm_slots, td->maxcontacts) {
0937         clear_bit(slotnum, app->pending_palm_slots);
0938
0939         input_mt_slot(input, slotnum);
0940         input_mt_report_slot_inactive(input);
0941
0942         need_sync = true;
0943     }
0944
0945     if (need_sync) {
0946         input_mt_sync_frame(input);
0947         input_sync(input);
0948     }
0949 }
0950
0951 /*
0952  * this function is called when a whole packet has been received and processed,
0953  * so that it can decide what to send to the input layer.
0954  */
0955 static void mt_sync_frame(struct mt_device *td, struct mt_application *app,
0956               struct input_dev *input)
0957 {
0958     if (app->quirks & MT_QUIRK_WIN8_PTP_BUTTONS)
0959         input_event(input, EV_KEY, BTN_LEFT, app->left_button_state);
0960
0961     input_mt_sync_frame(input);
0962     input_event(input, EV_MSC, MSC_TIMESTAMP, app->timestamp);
0963     input_sync(input);
0964
0965     mt_release_pending_palms(td, app, input);
0966
0967     app->num_received = 0;
0968     app->left_button_state = 0;
0969
0970     if (test_bit(MT_IO_FLAGS_ACTIVE_SLOTS, &td->mt_io_flags))
0971         set_bit(MT_IO_FLAGS_PENDING_SLOTS, &td->mt_io_flags);
0972     else
0973         clear_bit(MT_IO_FLAGS_PENDING_SLOTS, &td->mt_io_flags);
0974     clear_bit(MT_IO_FLAGS_ACTIVE_SLOTS, &td->mt_io_flags);
0975 }
0976
0977 static int mt_compute_timestamp(struct mt_application *app, __s32 value)
0978 {
0979     long delta = value - app->prev_scantime;
0980     unsigned long jdelta = jiffies_to_usecs(jiffies - app->jiffies);
0981
0982     app->jiffies = jiffies;
0983
0984     if (delta < 0)
0985         delta += app->scantime_logical_max;
0986
0987     /* HID_DG_SCANTIME is expressed in 100us, we want it in us. */
0988     delta *= 100;
0989
0990     if (jdelta > MAX_TIMESTAMP_INTERVAL)
0991         /* No data received for a while, resync the timestamp. */
0992         return 0;
0993     else
0994         return app->timestamp + delta;
0995 }
0996
0997 static int mt_touch_event(struct hid_device *hid, struct hid_field *field,
0998                 struct hid_usage *usage, __s32 value)
0999 {
1000     /* we will handle the hidinput part later, now remains hiddev */
1001     if (hid->claimed & HID_CLAIMED_HIDDEV && hid->hiddev_hid_event)
1002         hid->hiddev_hid_event(hid, field, usage, value);
1003
1004     return 1;
1005 }
1006
1007 static int mt_process_slot(struct mt_device *td, struct input_dev *input,
1008                 struct mt_application *app,
1009                 struct mt_usages *slot)
1010 {
1011     struct input_mt *mt = input->mt;
1012     __s32 quirks = app->quirks;
1013     bool valid = true;
1014     bool confidence_state = true;
1015     bool inrange_state = false;
1016     int active;
1017     int slotnum;
1018     int tool = MT_TOOL_FINGER;
1019
1020     if (!slot)
1021         return -EINVAL;
1022
1023     if ((quirks & MT_QUIRK_CONTACT_CNT_ACCURATE) &&
1024         app->num_received >= app->num_expected)
1025         return -EAGAIN;
1026
1027     if (!(quirks & MT_QUIRK_ALWAYS_VALID)) {
1028         if (quirks & MT_QUIRK_VALID_IS_INRANGE)
1029             valid = *slot->inrange_state;
1030         if (quirks & MT_QUIRK_NOT_SEEN_MEANS_UP)
1031             valid = *slot->tip_state;
1032         if (quirks & MT_QUIRK_VALID_IS_CONFIDENCE)
1033             valid = *slot->confidence_state;
1034
1035         if (!valid)
1036             return 0;
1037     }
1038
1039     slotnum = mt_compute_slot(td, app, slot, input);
1040     if (slotnum < 0 || slotnum >= td->maxcontacts)
1041         return 0;
1042
1043     if ((quirks & MT_QUIRK_IGNORE_DUPLICATES) && mt) {
1044         struct input_mt_slot *i_slot = &mt->slots[slotnum];
1045
1046         if (input_mt_is_active(i_slot) &&
1047             input_mt_is_used(mt, i_slot))
1048             return -EAGAIN;
1049     }
1050
1051     if (quirks & MT_QUIRK_CONFIDENCE)
1052         confidence_state = *slot->confidence_state;
1053
1054     if (quirks & MT_QUIRK_HOVERING)
1055         inrange_state = *slot->inrange_state;
1056
1057     active = *slot->tip_state || inrange_state;
1058
1059     if (app->application == HID_GD_SYSTEM_MULTIAXIS)
1060         tool = MT_TOOL_DIAL;
1061     else if (unlikely(!confidence_state)) {
1062         tool = MT_TOOL_PALM;
1063         if (!active && mt &&
1064             input_mt_is_active(&mt->slots[slotnum])) {
1065             /*
1066              * The non-confidence was reported for
1067              * previously valid contact that is also no
1068              * longer valid. We can't simply report
1069              * lift-off as userspace will not be aware
1070              * of non-confidence, so we need to split
1071              * it into 2 events: active MT_TOOL_PALM
1072              * and a separate liftoff.
1073              */
1074             active = true;
1075             set_bit(slotnum, app->pending_palm_slots);
1076         }
1077     }
1078
1079     input_mt_slot(input, slotnum);
1080     input_mt_report_slot_state(input, tool, active);
1081     if (active) {
1082         /* this finger is in proximity of the sensor */
1083         int wide = (*slot->w > *slot->h);
1084         int major = max(*slot->w, *slot->h);
1085         int minor = min(*slot->w, *slot->h);
1086         int orientation = wide;
1087         int max_azimuth;
1088         int azimuth;
1089
1090         if (slot->a != DEFAULT_ZERO) {
1091             /*
1092              * Azimuth is counter-clockwise and ranges from [0, MAX)
1093              * (a full revolution). Convert it to clockwise ranging
1094              * [-MAX/2, MAX/2].
1095              *
1096              * Note that ABS_MT_ORIENTATION require us to report
1097              * the limit of [-MAX/4, MAX/4], but the value can go
1098              * out of range to [-MAX/2, MAX/2] to report an upside
1099              * down ellipsis.
1100              */
1101             azimuth = *slot->a;
1102             max_azimuth = input_abs_get_max(input,
1103                             ABS_MT_ORIENTATION);
1104             if (azimuth > max_azimuth * 2)
1105                 azimuth -= max_azimuth * 4;
1106             orientation = -azimuth;
1107         }
1108
1109         if (quirks & MT_QUIRK_TOUCH_SIZE_SCALING) {
1110             /*
1111              * divided by two to match visual scale of touch
1112              * for devices with this quirk
1113              */
1114             major = major >> 1;
1115             minor = minor >> 1;
1116         }
1117
1118         input_event(input, EV_ABS, ABS_MT_POSITION_X, *slot->x);
1119         input_event(input, EV_ABS, ABS_MT_POSITION_Y, *slot->y);
1120         input_event(input, EV_ABS, ABS_MT_TOOL_X, *slot->cx);
1121         input_event(input, EV_ABS, ABS_MT_TOOL_Y, *slot->cy);
1122         input_event(input, EV_ABS, ABS_MT_DISTANCE, !*slot->tip_state);
1123         input_event(input, EV_ABS, ABS_MT_ORIENTATION, orientation);
1124         input_event(input, EV_ABS, ABS_MT_PRESSURE, *slot->p);
1125         input_event(input, EV_ABS, ABS_MT_TOUCH_MAJOR, major);
1126         input_event(input, EV_ABS, ABS_MT_TOUCH_MINOR, minor);
1127
1128         set_bit(MT_IO_FLAGS_ACTIVE_SLOTS, &td->mt_io_flags);
1129     }
1130
1131     return 0;
1132 }
1133
1134 static void mt_process_mt_event(struct hid_device *hid,
1135                 struct mt_application *app,
1136                 struct hid_field *field,
1137                 struct hid_usage *usage,
1138                 __s32 value,
1139                 bool first_packet)
1140 {
1141     __s32 quirks = app->quirks;
1142     struct input_dev *input = field->hidinput->input;
1143
1144     if (!usage->type || !(hid->claimed & HID_CLAIMED_INPUT))
1145         return;
1146
1147     if (quirks & MT_QUIRK_WIN8_PTP_BUTTONS) {
1148
1149         /*
1150          * For Win8 PTP touchpads we should only look at
1151          * non finger/touch events in the first_packet of a
1152          * (possible) multi-packet frame.
1153          */
1154         if (!first_packet)
1155             return;
1156
1157         /*
1158          * For Win8 PTP touchpads we map both the clickpad click
1159          * and any "external" left buttons to BTN_LEFT if a
1160          * device claims to have both we need to report 1 for
1161          * BTN_LEFT if either is pressed, so we or all values
1162          * together and report the result in mt_sync_frame().
1163          */
1164         if (usage->type == EV_KEY && usage->code == BTN_LEFT) {
1165             app->left_button_state |= value;
1166             return;
1167         }
1168     }
1169
1170     input_event(input, usage->type, usage->code, value);
1171 }
1172
1173 static void mt_touch_report(struct hid_device *hid,
1174                 struct mt_report_data *rdata)
1175 {
1176     struct mt_device *td = hid_get_drvdata(hid);
1177     struct hid_report *report = rdata->report;
1178     struct mt_application *app = rdata->application;
1179     struct hid_field *field;
1180     struct input_dev *input;
1181     struct mt_usages *slot;
1182     bool first_packet;
1183     unsigned count;
1184     int r, n;
1185     int scantime = 0;
1186     int contact_count = -1;
1187
1188     /* sticky fingers release in progress, abort */
1189     if (test_and_set_bit(MT_IO_FLAGS_RUNNING, &td->mt_io_flags))
1190         return;
1191
1192     scantime = *app->scantime;
1193     app->timestamp = mt_compute_timestamp(app, scantime);
1194     if (app->raw_cc != DEFAULT_ZERO)
1195         contact_count = *app->raw_cc;
1196
1197     /*
1198      * Includes multi-packet support where subsequent
1199      * packets are sent with zero contactcount.
1200      */
1201     if (contact_count >= 0) {
1202         /*
1203          * For Win8 PTPs the first packet (td->num_received == 0) may
1204          * have a contactcount of 0 if there only is a button event.
1205          * We double check that this is not a continuation packet
1206          * of a possible multi-packet frame be checking that the
1207          * timestamp has changed.
1208          */
1209         if ((app->quirks & MT_QUIRK_WIN8_PTP_BUTTONS) &&
1210             app->num_received == 0 &&
1211             app->prev_scantime != scantime)
1212             app->num_expected = contact_count;
1213         /* A non 0 contact count always indicates a first packet */
1214         else if (contact_count)
1215             app->num_expected = contact_count;
1216     }
1217     app->prev_scantime = scantime;
1218
1219     first_packet = app->num_received == 0;
1220
1221     input = report->field[0]->hidinput->input;
1222
1223     list_for_each_entry(slot, &app->mt_usages, list) {
1224         if (!mt_process_slot(td, input, app, slot))
1225             app->num_received++;
1226     }
1227
1228     for (r = 0; r < report->maxfield; r++) {
1229         field = report->field[r];
1230         count = field->report_count;
1231
1232         if (!(HID_MAIN_ITEM_VARIABLE & field->flags))
1233             continue;
1234
1235         for (n = 0; n < count; n++)
1236             mt_process_mt_event(hid, app, field,
1237                         &field->usage[n], field->value[n],
1238                         first_packet);
1239     }
1240
1241     if (app->num_received >= app->num_expected)
1242         mt_sync_frame(td, app, input);
1243
1244     /*
1245      * Windows 8 specs says 2 things:
1246      * - once a contact has been reported, it has to be reported in each
1247      *   subsequent report
1248      * - the report rate when fingers are present has to be at least
1249      *   the refresh rate of the screen, 60 or 120 Hz
1250      *
1251      * I interprete this that the specification forces a report rate of
1252      * at least 60 Hz for a touchscreen to be certified.
1253      * Which means that if we do not get a report whithin 16 ms, either
1254      * something wrong happens, either the touchscreen forgets to send
1255      * a release. Taking a reasonable margin allows to remove issues
1256      * with USB communication or the load of the machine.
1257      *
1258      * Given that Win 8 devices are forced to send a release, this will
1259      * only affect laggish machines and the ones that have a firmware
1260      * defect.
1261      */
1262     if (app->quirks & MT_QUIRK_STICKY_FINGERS) {
1263         if (test_bit(MT_IO_FLAGS_PENDING_SLOTS, &td->mt_io_flags))
1264             mod_timer(&td->release_timer,
1265                   jiffies + msecs_to_jiffies(100));
1266         else
1267             del_timer(&td->release_timer);
1268     }
1269
1270     clear_bit(MT_IO_FLAGS_RUNNING, &td->mt_io_flags);
1271 }
1272
1273 static int mt_touch_input_configured(struct hid_device *hdev,
1274                      struct hid_input *hi,
1275                      struct mt_application *app)
1276 {
1277     struct mt_device *td = hid_get_drvdata(hdev);
1278     struct mt_class *cls = &td->mtclass;
1279     struct input_dev *input = hi->input;
1280     int ret;
1281
1282     if (!td->maxcontacts)
1283         td->maxcontacts = MT_DEFAULT_MAXCONTACT;
1284
1285     mt_post_parse(td, app);
1286     if (td->serial_maybe)
1287         mt_post_parse_default_settings(td, app);
1288
1289     if (cls->is_indirect)
1290         app->mt_flags |= INPUT_MT_POINTER;
1291
1292     if (app->quirks & MT_QUIRK_NOT_SEEN_MEANS_UP)
1293         app->mt_flags |= INPUT_MT_DROP_UNUSED;
1294
1295     /* check for clickpads */
1296     if ((app->mt_flags & INPUT_MT_POINTER) &&
1297         (app->buttons_count == 1))
1298         td->is_buttonpad = true;
1299
1300     if (td->is_buttonpad)
1301         __set_bit(INPUT_PROP_BUTTONPAD, input->propbit);
1302
1303     app->pending_palm_slots = devm_kcalloc(&hi->input->dev,
1304                            BITS_TO_LONGS(td->maxcontacts),
1305                            sizeof(long),
1306                            GFP_KERNEL);
1307     if (!app->pending_palm_slots)
1308         return -ENOMEM;
1309
1310     ret = input_mt_init_slots(input, td->maxcontacts, app->mt_flags);
1311     if (ret)
1312         return ret;
1313
1314     app->mt_flags = 0;
1315     return 0;
1316 }
1317
1318 #define mt_map_key_clear(c) hid_map_usage_clear(hi, usage, bit, \
1319                             max, EV_KEY, (c))
1320 static int mt_input_mapping(struct hid_device *hdev, struct hid_input *hi,
1321         struct hid_field *field, struct hid_usage *usage,
1322         unsigned long **bit, int *max)
1323 {
1324     struct mt_device *td = hid_get_drvdata(hdev);
1325     struct mt_application *application;
1326     struct mt_report_data *rdata;
1327
1328     rdata = mt_find_report_data(td, field->report);
1329     if (!rdata) {
1330         hid_err(hdev, "failed to allocate data for report\n");
1331         return 0;
1332     }
1333
1334     application = rdata->application;
1335
1336     /*
1337      * If mtclass.export_all_inputs is not set, only map fields from
1338      * TouchScreen or TouchPad collections. We need to ignore fields
1339      * that belong to other collections such as Mouse that might have
1340      * the same GenericDesktop usages.
1341      */
1342     if (!td->mtclass.export_all_inputs &&
1343         field->application != HID_DG_TOUCHSCREEN &&
1344         field->application != HID_DG_PEN &&
1345         field->application != HID_DG_TOUCHPAD &&
1346         field->application != HID_GD_KEYBOARD &&
1347         field->application != HID_GD_SYSTEM_CONTROL &&
1348         field->application != HID_CP_CONSUMER_CONTROL &&
1349         field->application != HID_GD_WIRELESS_RADIO_CTLS &&
1350         field->application != HID_GD_SYSTEM_MULTIAXIS &&
1351         !(field->application == HID_VD_ASUS_CUSTOM_MEDIA_KEYS &&
1352           application->quirks & MT_QUIRK_ASUS_CUSTOM_UP))
1353         return -1;
1354
1355     /*
1356      * Some Asus keyboard+touchpad devices have the hotkeys defined in the
1357      * touchpad report descriptor. We need to treat these as an array to
1358      * map usages to input keys.
1359      */
1360     if (field->application == HID_VD_ASUS_CUSTOM_MEDIA_KEYS &&
1361         application->quirks & MT_QUIRK_ASUS_CUSTOM_UP &&
1362         (usage->hid & HID_USAGE_PAGE) == HID_UP_CUSTOM) {
1363         set_bit(EV_REP, hi->input->evbit);
1364         if (field->flags & HID_MAIN_ITEM_VARIABLE)
1365             field->flags &= ~HID_MAIN_ITEM_VARIABLE;
1366         switch (usage->hid & HID_USAGE) {
1367         case 0x10: mt_map_key_clear(KEY_BRIGHTNESSDOWN);    break;
1368         case 0x20: mt_map_key_clear(KEY_BRIGHTNESSUP);      break;
1369         case 0x35: mt_map_key_clear(KEY_DISPLAY_OFF);       break;
1370         case 0x6b: mt_map_key_clear(KEY_F21);           break;
1371         case 0x6c: mt_map_key_clear(KEY_SLEEP);         break;
1372         default:
1373             return -1;
1374         }
1375         return 1;
1376     }
1377
1378     if (rdata->is_mt_collection)
1379         return mt_touch_input_mapping(hdev, hi, field, usage, bit, max,
1380                           application);
1381
1382     /*
1383      * some egalax touchscreens have "application == DG_TOUCHSCREEN"
1384      * for the stylus. Overwrite the hid_input application
1385      */
1386     if (field->physical == HID_DG_STYLUS)
1387         hi->application = HID_DG_STYLUS;
1388
1389     /* let hid-core decide for the others */
1390     return 0;
1391 }
1392
1393 static int mt_input_mapped(struct hid_device *hdev, struct hid_input *hi,
1394         struct hid_field *field, struct hid_usage *usage,
1395         unsigned long **bit, int *max)
1396 {
1397     struct mt_device *td = hid_get_drvdata(hdev);
1398     struct mt_report_data *rdata;
1399
1400     rdata = mt_find_report_data(td, field->report);
1401     if (rdata && rdata->is_mt_collection) {
1402         /* We own these mappings, tell hid-input to ignore them */
1403         return -1;
1404     }
1405
1406     /* let hid-core decide for the others */
1407     return 0;
1408 }
1409
1410 static int mt_event(struct hid_device *hid, struct hid_field *field,
1411                 struct hid_usage *usage, __s32 value)
1412 {
1413     struct mt_device *td = hid_get_drvdata(hid);
1414     struct mt_report_data *rdata;
1415
1416     rdata = mt_find_report_data(td, field->report);
1417     if (rdata && rdata->is_mt_collection)
1418         return mt_touch_event(hid, field, usage, value);
1419
1420     return 0;
1421 }
1422
1423 static void mt_report(struct hid_device *hid, struct hid_report *report)
1424 {
1425     struct mt_device *td = hid_get_drvdata(hid);
1426     struct hid_field *field = report->field[0];
1427     struct mt_report_data *rdata;
1428
1429     if (!(hid->claimed & HID_CLAIMED_INPUT))
1430         return;
1431
1432     rdata = mt_find_report_data(td, report);
1433     if (rdata && rdata->is_mt_collection)
1434         return mt_touch_report(hid, rdata);
1435
1436     if (field && field->hidinput && field->hidinput->input)
1437         input_sync(field->hidinput->input);
1438 }
1439
1440 static bool mt_need_to_apply_feature(struct hid_device *hdev,
1441                      struct hid_field *field,
1442                      struct hid_usage *usage,
1443                      enum latency_mode latency,
1444                      bool surface_switch,
1445                      bool button_switch,
1446                      bool *inputmode_found)
1447 {
1448     struct mt_device *td = hid_get_drvdata(hdev);
1449     struct mt_class *cls = &td->mtclass;
1450     struct hid_report *report = field->report;
1451     unsigned int index = usage->usage_index;
1452     char *buf;
1453     u32 report_len;
1454     int max;
1455
1456     switch (usage->hid) {
1457     case HID_DG_INPUTMODE:
1458         /*
1459          * Some elan panels wrongly declare 2 input mode features,
1460          * and silently ignore when we set the value in the second
1461          * field. Skip the second feature and hope for the best.
1462          */
1463         if (*inputmode_found)
1464             return false;
1465
1466         if (cls->quirks & MT_QUIRK_FORCE_GET_FEATURE) {
1467             report_len = hid_report_len(report);
1468             buf = hid_alloc_report_buf(report, GFP_KERNEL);
1469             if (!buf) {
1470                 hid_err(hdev,
1471                     "failed to allocate buffer for report\n");
1472                 return false;
1473             }
1474             hid_hw_raw_request(hdev, report->id, buf, report_len,
1475                        HID_FEATURE_REPORT,
1476                        HID_REQ_GET_REPORT);
1477             kfree(buf);
1478         }
1479
1480         field->value[index] = td->inputmode_value;
1481         *inputmode_found = true;
1482         return true;
1483
1484     case HID_DG_CONTACTMAX:
1485         if (cls->maxcontacts) {
1486             max = min_t(int, field->logical_maximum,
1487                     cls->maxcontacts);
1488             if (field->value[index] != max) {
1489                 field->value[index] = max;
1490                 return true;
1491             }
1492         }
1493         break;
1494
1495     case HID_DG_LATENCYMODE:
1496         field->value[index] = latency;
1497         return true;
1498
1499     case HID_DG_SURFACESWITCH:
1500         field->value[index] = surface_switch;
1501         return true;
1502
1503     case HID_DG_BUTTONSWITCH:
1504         field->value[index] = button_switch;
1505         return true;
1506     }
1507
1508     return false; /* no need to update the report */
1509 }
1510
1511 static void mt_set_modes(struct hid_device *hdev, enum latency_mode latency,
1512              bool surface_switch, bool button_switch)
1513 {
1514     struct hid_report_enum *rep_enum;
1515     struct hid_report *rep;
1516     struct hid_usage *usage;
1517     int i, j;
1518     bool update_report;
1519     bool inputmode_found = false;
1520
1521     rep_enum = &hdev->report_enum[HID_FEATURE_REPORT];
1522     list_for_each_entry(rep, &rep_enum->report_list, list) {
1523         update_report = false;
1524
1525         for (i = 0; i < rep->maxfield; i++) {
1526             /* Ignore if report count is out of bounds. */
1527             if (rep->field[i]->report_count < 1)
1528                 continue;
1529
1530             for (j = 0; j < rep->field[i]->maxusage; j++) {
1531                 usage = &rep->field[i]->usage[j];
1532
1533                 if (mt_need_to_apply_feature(hdev,
1534                                  rep->field[i],
1535                                  usage,
1536                                  latency,
1537                                  surface_switch,
1538                                  button_switch,
1539                                  &inputmode_found))
1540                     update_report = true;
1541             }
1542         }
1543
1544         if (update_report)
1545             hid_hw_request(hdev, rep, HID_REQ_SET_REPORT);
1546     }
1547 }
1548
1549 static void mt_post_parse_default_settings(struct mt_device *td,
1550                        struct mt_application *app)
1551 {
1552     __s32 quirks = app->quirks;
1553
1554     /* unknown serial device needs special quirks */
1555     if (list_is_singular(&app->mt_usages)) {
1556         quirks |= MT_QUIRK_ALWAYS_VALID;
1557         quirks &= ~MT_QUIRK_NOT_SEEN_MEANS_UP;
1558         quirks &= ~MT_QUIRK_VALID_IS_INRANGE;
1559         quirks &= ~MT_QUIRK_VALID_IS_CONFIDENCE;
1560         quirks &= ~MT_QUIRK_CONTACT_CNT_ACCURATE;
1561     }
1562
1563     app->quirks = quirks;
1564 }
1565
1566 static void mt_post_parse(struct mt_device *td, struct mt_application *app)
1567 {
1568     if (!app->have_contact_count)
1569         app->quirks &= ~MT_QUIRK_CONTACT_CNT_ACCURATE;
1570 }
1571
1572 static int mt_input_configured(struct hid_device *hdev, struct hid_input *hi)
1573 {
1574     struct mt_device *td = hid_get_drvdata(hdev);
1575     char *name;
1576     const char *suffix = NULL;
1577     struct mt_report_data *rdata;
1578     struct mt_application *mt_application = NULL;
1579     struct hid_report *report;
1580     int ret;
1581
1582     list_for_each_entry(report, &hi->reports, hidinput_list) {
1583         rdata = mt_find_report_data(td, report);
1584         if (!rdata) {
1585             hid_err(hdev, "failed to allocate data for report\n");
1586             return -ENOMEM;
1587         }
1588
1589         mt_application = rdata->application;
1590
1591         if (rdata->is_mt_collection) {
1592             ret = mt_touch_input_configured(hdev, hi,
1593                             mt_application);
1594             if (ret)
1595                 return ret;
1596         }
1597     }
1598
1599     switch (hi->application) {
1600     case HID_GD_KEYBOARD:
1601     case HID_GD_KEYPAD:
1602     case HID_GD_MOUSE:
1603     case HID_DG_TOUCHPAD:
1604     case HID_GD_SYSTEM_CONTROL:
1605     case HID_CP_CONSUMER_CONTROL:
1606     case HID_GD_WIRELESS_RADIO_CTLS:
1607     case HID_GD_SYSTEM_MULTIAXIS:
1608         /* already handled by hid core */
1609         break;
1610     case HID_DG_TOUCHSCREEN:
1611         /* we do not set suffix = "Touchscreen" */
1612         hi->input->name = hdev->name;
1613         break;
1614     case HID_VD_ASUS_CUSTOM_MEDIA_KEYS:
1615         suffix = "Custom Media Keys";
1616         break;
1617     case HID_DG_STYLUS:
1618         /* force BTN_STYLUS to allow tablet matching in udev */
1619         __set_bit(BTN_STYLUS, hi->input->keybit);
1620         break;
1621     default:
1622         suffix = "UNKNOWN";
1623         break;
1624     }
1625
1626     if (suffix) {
1627         name = devm_kzalloc(&hi->input->dev,
1628                     strlen(hdev->name) + strlen(suffix) + 2,
1629                     GFP_KERNEL);
1630         if (name) {
1631             sprintf(name, "%s %s", hdev->name, suffix);
1632             hi->input->name = name;
1633         }
1634     }
1635
1636     return 0;
1637 }
1638
1639 static void mt_fix_const_field(struct hid_field *field, unsigned int usage)
1640 {
1641     if (field->usage[0].hid != usage ||
1642         !(field->flags & HID_MAIN_ITEM_CONSTANT))
1643         return;
1644
1645     field->flags &= ~HID_MAIN_ITEM_CONSTANT;
1646     field->flags |= HID_MAIN_ITEM_VARIABLE;
1647 }
1648
1649 static void mt_fix_const_fields(struct hid_device *hdev, unsigned int usage)
1650 {
1651     struct hid_report *report;
1652     int i;
1653
1654     list_for_each_entry(report,
1655                 &hdev->report_enum[HID_INPUT_REPORT].report_list,
1656                 list) {
1657
1658         if (!report->maxfield)
1659             continue;
1660
1661         for (i = 0; i < report->maxfield; i++)
1662             if (report->field[i]->maxusage >= 1)
1663                 mt_fix_const_field(report->field[i], usage);
1664     }
1665 }
1666
1667 static void mt_release_contacts(struct hid_device *hid)
1668 {
1669     struct hid_input *hidinput;
1670     struct mt_application *application;
1671     struct mt_device *td = hid_get_drvdata(hid);
1672
1673     list_for_each_entry(hidinput, &hid->inputs, list) {
1674         struct input_dev *input_dev = hidinput->input;
1675         struct input_mt *mt = input_dev->mt;
1676         int i;
1677
1678         if (mt) {
1679             for (i = 0; i < mt->num_slots; i++) {
1680                 input_mt_slot(input_dev, i);
1681                 input_mt_report_slot_inactive(input_dev);
1682             }
1683             input_mt_sync_frame(input_dev);
1684             input_sync(input_dev);
1685         }
1686     }
1687
1688     list_for_each_entry(application, &td->applications, list) {
1689         application->num_received = 0;
1690     }
1691 }
1692
1693 static void mt_expired_timeout(struct timer_list *t)
1694 {
1695     struct mt_device *td = from_timer(td, t, release_timer);
1696     struct hid_device *hdev = td->hdev;
1697
1698     /*
1699      * An input report came in just before we release the sticky fingers,
1700      * it will take care of the sticky fingers.
1701      */
1702     if (test_and_set_bit(MT_IO_FLAGS_RUNNING, &td->mt_io_flags))
1703         return;
1704     if (test_bit(MT_IO_FLAGS_PENDING_SLOTS, &td->mt_io_flags))
1705         mt_release_contacts(hdev);
1706     clear_bit(MT_IO_FLAGS_RUNNING, &td->mt_io_flags);
1707 }
1708
1709 static int mt_probe(struct hid_device *hdev, const struct hid_device_id *id)
1710 {
1711     int ret, i;
1712     struct mt_device *td;
1713     const struct mt_class *mtclass = mt_classes; /* MT_CLS_DEFAULT */
1714
1715     for (i = 0; mt_classes[i].name ; i++) {
1716         if (id->driver_data == mt_classes[i].name) {
1717             mtclass = &(mt_classes[i]);
1718             break;
1719         }
1720     }
1721
1722     td = devm_kzalloc(&hdev->dev, sizeof(struct mt_device), GFP_KERNEL);
1723     if (!td) {
1724         dev_err(&hdev->dev, "cannot allocate multitouch data\n");
1725         return -ENOMEM;
1726     }
1727     td->hdev = hdev;
1728     td->mtclass = *mtclass;
1729     td->inputmode_value = MT_INPUTMODE_TOUCHSCREEN;
1730     hid_set_drvdata(hdev, td);
1731
1732     INIT_LIST_HEAD(&td->applications);
1733     INIT_LIST_HEAD(&td->reports);
1734
1735     if (id->vendor == HID_ANY_ID && id->product == HID_ANY_ID)
1736         td->serial_maybe = true;
1737
1738     /* This allows the driver to correctly support devices
1739      * that emit events over several HID messages.
1740      */
1741     hdev->quirks |= HID_QUIRK_NO_INPUT_SYNC;
1742
1743     /*
1744      * This allows the driver to handle different input sensors
1745      * that emits events through different applications on the same HID
1746      * device.
1747      */
1748     hdev->quirks |= HID_QUIRK_INPUT_PER_APP;
1749
1750     if (id->group != HID_GROUP_MULTITOUCH_WIN_8)
1751         hdev->quirks |= HID_QUIRK_MULTI_INPUT;
1752
1753     if (mtclass->quirks & MT_QUIRK_FORCE_MULTI_INPUT) {
1754         hdev->quirks &= ~HID_QUIRK_INPUT_PER_APP;
1755         hdev->quirks |= HID_QUIRK_MULTI_INPUT;
1756     }
1757
1758     timer_setup(&td->release_timer, mt_expired_timeout, 0);
1759
1760     ret = hid_parse(hdev);
1761     if (ret != 0)
1762         return ret;
1763
1764     if (mtclass->quirks & MT_QUIRK_FIX_CONST_CONTACT_ID)
1765         mt_fix_const_fields(hdev, HID_DG_CONTACTID);
1766
1767     ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
1768     if (ret)
1769         return ret;
1770
1771     ret = sysfs_create_group(&hdev->dev.kobj, &mt_attribute_group);
1772     if (ret)
1773         dev_warn(&hdev->dev, "Cannot allocate sysfs group for %s\n",
1774                 hdev->name);
1775
1776     mt_set_modes(hdev, HID_LATENCY_NORMAL, true, true);
1777
1778     return 0;
1779 }
1780
1781 #ifdef CONFIG_PM
1782 static int mt_suspend(struct hid_device *hdev, pm_message_t state)
1783 {
1784     struct mt_device *td = hid_get_drvdata(hdev);
1785
1786     /* High latency is desirable for power savings during S3/S0ix */
1787     if ((td->mtclass.quirks & MT_QUIRK_DISABLE_WAKEUP) ||
1788         !hid_hw_may_wakeup(hdev))
1789         mt_set_modes(hdev, HID_LATENCY_HIGH, false, false);
1790     else
1791         mt_set_modes(hdev, HID_LATENCY_HIGH, true, true);
1792
1793     return 0;
1794 }
1795
1796 static int mt_reset_resume(struct hid_device *hdev)
1797 {
1798     mt_release_contacts(hdev);
1799     mt_set_modes(hdev, HID_LATENCY_NORMAL, true, true);
1800     return 0;
1801 }
1802
1803 static int mt_resume(struct hid_device *hdev)
1804 {
1805     /* Some Elan legacy devices require SET_IDLE to be set on resume.
1806      * It should be safe to send it to other devices too.
1807      * Tested on 3M, Stantum, Cypress, Zytronic, eGalax, and Elan panels. */
1808
1809     hid_hw_idle(hdev, 0, 0, HID_REQ_SET_IDLE);
1810
1811     mt_set_modes(hdev, HID_LATENCY_NORMAL, true, true);
1812
1813     return 0;
1814 }
1815 #endif
1816
1817 static void mt_remove(struct hid_device *hdev)
1818 {
1819     struct mt_device *td = hid_get_drvdata(hdev);
1820
1821     del_timer_sync(&td->release_timer);
1822
1823     sysfs_remove_group(&hdev->dev.kobj, &mt_attribute_group);
1824     hid_hw_stop(hdev);
1825 }
1826
1827 /*
1828  * This list contains only:
1829  * - VID/PID of products not working with the default multitouch handling
1830  * - 2 generic rules.
1831  * So there is no point in adding here any device with MT_CLS_DEFAULT.
1832  */
1833 static const struct hid_device_id mt_devices[] = {
1834
1835     /* 3M panels */
1836     { .driver_data = MT_CLS_3M,
1837         MT_USB_DEVICE(USB_VENDOR_ID_3M,
1838             USB_DEVICE_ID_3M1968) },
1839     { .driver_data = MT_CLS_3M,
1840         MT_USB_DEVICE(USB_VENDOR_ID_3M,
1841             USB_DEVICE_ID_3M2256) },
1842     { .driver_data = MT_CLS_3M,
1843         MT_USB_DEVICE(USB_VENDOR_ID_3M,
1844             USB_DEVICE_ID_3M3266) },
1845
1846     /* Anton devices */
1847     { .driver_data = MT_CLS_EXPORT_ALL_INPUTS,
1848         MT_USB_DEVICE(USB_VENDOR_ID_ANTON,
1849             USB_DEVICE_ID_ANTON_TOUCH_PAD) },
1850
1851     /* Asus T101HA */
1852     { .driver_data = MT_CLS_WIN_8_DISABLE_WAKEUP,
1853         HID_DEVICE(BUS_USB, HID_GROUP_MULTITOUCH_WIN_8,
1854                USB_VENDOR_ID_ASUSTEK,
1855                USB_DEVICE_ID_ASUSTEK_T101HA_KEYBOARD) },
1856
1857     /* Asus T304UA */
1858     { .driver_data = MT_CLS_ASUS,
1859         HID_DEVICE(BUS_USB, HID_GROUP_MULTITOUCH_WIN_8,
1860             USB_VENDOR_ID_ASUSTEK,
1861             USB_DEVICE_ID_ASUSTEK_T304_KEYBOARD) },
1862
1863     /* Atmel panels */
1864     { .driver_data = MT_CLS_SERIAL,
1865         MT_USB_DEVICE(USB_VENDOR_ID_ATMEL,
1866             USB_DEVICE_ID_ATMEL_MXT_DIGITIZER) },
1867
1868     /* Baanto multitouch devices */
1869     { .driver_data = MT_CLS_NSMU,
1870         MT_USB_DEVICE(USB_VENDOR_ID_BAANTO,
1871             USB_DEVICE_ID_BAANTO_MT_190W2) },
1872
1873     /* Cando panels */
1874     { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTNUMBER,
1875         MT_USB_DEVICE(USB_VENDOR_ID_CANDO,
1876             USB_DEVICE_ID_CANDO_MULTI_TOUCH) },
1877     { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTNUMBER,
1878         MT_USB_DEVICE(USB_VENDOR_ID_CANDO,
1879             USB_DEVICE_ID_CANDO_MULTI_TOUCH_15_6) },
1880
1881     /* Chunghwa Telecom touch panels */
1882     {  .driver_data = MT_CLS_NSMU,
1883         MT_USB_DEVICE(USB_VENDOR_ID_CHUNGHWAT,
1884             USB_DEVICE_ID_CHUNGHWAT_MULTITOUCH) },
1885
1886     /* CJTouch panels */
1887     { .driver_data = MT_CLS_NSMU,
1888         MT_USB_DEVICE(USB_VENDOR_ID_CJTOUCH,
1889             USB_DEVICE_ID_CJTOUCH_MULTI_TOUCH_0020) },
1890     { .driver_data = MT_CLS_NSMU,
1891         MT_USB_DEVICE(USB_VENDOR_ID_CJTOUCH,
1892             USB_DEVICE_ID_CJTOUCH_MULTI_TOUCH_0040) },
1893
1894     /* CVTouch panels */
1895     { .driver_data = MT_CLS_NSMU,
1896         MT_USB_DEVICE(USB_VENDOR_ID_CVTOUCH,
1897             USB_DEVICE_ID_CVTOUCH_SCREEN) },
1898
1899     /* eGalax devices (SAW) */
1900     { .driver_data = MT_CLS_EXPORT_ALL_INPUTS,
1901         MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1902             USB_DEVICE_ID_EGALAX_TOUCHCONTROLLER) },
1903
1904     /* eGalax devices (resistive) */
1905     { .driver_data = MT_CLS_EGALAX,
1906         MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1907             USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_480D) },
1908     { .driver_data = MT_CLS_EGALAX,
1909         MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1910             USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_480E) },
1911
1912     /* eGalax devices (capacitive) */
1913     { .driver_data = MT_CLS_EGALAX_SERIAL,
1914         MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1915             USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7207) },
1916     { .driver_data = MT_CLS_EGALAX,
1917         MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1918             USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_720C) },
1919     { .driver_data = MT_CLS_EGALAX_SERIAL,
1920         MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1921             USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7224) },
1922     { .driver_data = MT_CLS_EGALAX_SERIAL,
1923         MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1924             USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_722A) },
1925     { .driver_data = MT_CLS_EGALAX_SERIAL,
1926         MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1927             USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_725E) },
1928     { .driver_data = MT_CLS_EGALAX_SERIAL,
1929         MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1930             USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7262) },
1931     { .driver_data = MT_CLS_EGALAX,
1932         MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1933             USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_726B) },
1934     { .driver_data = MT_CLS_EGALAX,
1935         MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1936             USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72A1) },
1937     { .driver_data = MT_CLS_EGALAX_SERIAL,
1938         MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1939             USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72AA) },
1940     { .driver_data = MT_CLS_EGALAX,
1941         HID_USB_DEVICE(USB_VENDOR_ID_DWAV,
1942             USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72C4) },
1943     { .driver_data = MT_CLS_EGALAX,
1944         HID_USB_DEVICE(USB_VENDOR_ID_DWAV,
1945             USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72D0) },
1946     { .driver_data = MT_CLS_EGALAX,
1947         MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1948             USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72FA) },
1949     { .driver_data = MT_CLS_EGALAX,
1950         MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1951             USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7302) },
1952     { .driver_data = MT_CLS_EGALAX_SERIAL,
1953         MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1954             USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7349) },
1955     { .driver_data = MT_CLS_EGALAX_SERIAL,
1956         MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1957             USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_73F7) },
1958     { .driver_data = MT_CLS_EGALAX_SERIAL,
1959         MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1960             USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_A001) },
1961     { .driver_data = MT_CLS_EGALAX,
1962         MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1963             USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_C002) },
1964
1965     /* Elan devices */
1966     { .driver_data = MT_CLS_WIN_8_FORCE_MULTI_INPUT,
1967         HID_DEVICE(BUS_I2C, HID_GROUP_MULTITOUCH_WIN_8,
1968             USB_VENDOR_ID_ELAN, 0x313a) },
1969
1970     /* Elitegroup panel */
1971     { .driver_data = MT_CLS_SERIAL,
1972         MT_USB_DEVICE(USB_VENDOR_ID_ELITEGROUP,
1973             USB_DEVICE_ID_ELITEGROUP_05D8) },
1974
1975     /* Flatfrog Panels */
1976     { .driver_data = MT_CLS_FLATFROG,
1977         MT_USB_DEVICE(USB_VENDOR_ID_FLATFROG,
1978             USB_DEVICE_ID_MULTITOUCH_3200) },
1979
1980     /* FocalTech Panels */
1981     { .driver_data = MT_CLS_SERIAL,
1982         MT_USB_DEVICE(USB_VENDOR_ID_CYGNAL,
1983             USB_DEVICE_ID_FOCALTECH_FTXXXX_MULTITOUCH) },
1984
1985     /* GeneralTouch panel */
1986     { .driver_data = MT_CLS_GENERALTOUCH_TWOFINGERS,
1987         MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
1988             USB_DEVICE_ID_GENERAL_TOUCH_WIN7_TWOFINGERS) },
1989     { .driver_data = MT_CLS_GENERALTOUCH_PWT_TENFINGERS,
1990         MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
1991             USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PWT_TENFINGERS) },
1992     { .driver_data = MT_CLS_GENERALTOUCH_TWOFINGERS,
1993         MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
1994             USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PIT_0101) },
1995     { .driver_data = MT_CLS_GENERALTOUCH_PWT_TENFINGERS,
1996         MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
1997             USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PIT_0102) },
1998     { .driver_data = MT_CLS_GENERALTOUCH_PWT_TENFINGERS,
1999         MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
2000             USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PIT_0106) },
2001     { .driver_data = MT_CLS_GENERALTOUCH_PWT_TENFINGERS,
2002         MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
2003             USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PIT_010A) },
2004     { .driver_data = MT_CLS_GENERALTOUCH_PWT_TENFINGERS,
2005         MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
2006             USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PIT_E100) },
2007
2008     /* Gametel game controller */
2009     { .driver_data = MT_CLS_NSMU,
2010         MT_BT_DEVICE(USB_VENDOR_ID_FRUCTEL,
2011             USB_DEVICE_ID_GAMETEL_MT_MODE) },
2012
2013     /* GoodTouch panels */
2014     { .driver_data = MT_CLS_NSMU,
2015         MT_USB_DEVICE(USB_VENDOR_ID_GOODTOUCH,
2016             USB_DEVICE_ID_GOODTOUCH_000f) },
2017
2018     /* Hanvon panels */
2019     { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTID,
2020         MT_USB_DEVICE(USB_VENDOR_ID_HANVON_ALT,
2021             USB_DEVICE_ID_HANVON_ALT_MULTITOUCH) },
2022
2023     /* Ilitek dual touch panel */
2024     {  .driver_data = MT_CLS_NSMU,
2025         MT_USB_DEVICE(USB_VENDOR_ID_ILITEK,
2026             USB_DEVICE_ID_ILITEK_MULTITOUCH) },
2027
2028     /* LG Melfas panel */
2029     { .driver_data = MT_CLS_LG,
2030         HID_USB_DEVICE(USB_VENDOR_ID_LG,
2031             USB_DEVICE_ID_LG_MELFAS_MT) },
2032     { .driver_data = MT_CLS_LG,
2033         HID_DEVICE(BUS_I2C, HID_GROUP_GENERIC,
2034             USB_VENDOR_ID_LG, I2C_DEVICE_ID_LG_7010) },
2035
2036     /* Lenovo X1 TAB Gen 2 */
2037     { .driver_data = MT_CLS_WIN_8_FORCE_MULTI_INPUT,
2038         HID_DEVICE(BUS_USB, HID_GROUP_MULTITOUCH_WIN_8,
2039                USB_VENDOR_ID_LENOVO,
2040                USB_DEVICE_ID_LENOVO_X1_TAB) },
2041
2042     /* Lenovo X1 TAB Gen 3 */
2043     { .driver_data = MT_CLS_WIN_8_FORCE_MULTI_INPUT,
2044         HID_DEVICE(BUS_USB, HID_GROUP_MULTITOUCH_WIN_8,
2045                USB_VENDOR_ID_LENOVO,
2046                USB_DEVICE_ID_LENOVO_X1_TAB3) },
2047
2048     /* Lenovo X12 TAB Gen 1 */
2049     { .driver_data = MT_CLS_WIN_8_FORCE_MULTI_INPUT_NSMU,
2050         HID_DEVICE(BUS_USB, HID_GROUP_MULTITOUCH_WIN_8,
2051                USB_VENDOR_ID_LENOVO,
2052                USB_DEVICE_ID_LENOVO_X12_TAB) },
2053
2054     /* MosArt panels */
2055     { .driver_data = MT_CLS_CONFIDENCE_MINUS_ONE,
2056         MT_USB_DEVICE(USB_VENDOR_ID_ASUS,
2057             USB_DEVICE_ID_ASUS_T91MT)},
2058     { .driver_data = MT_CLS_CONFIDENCE_MINUS_ONE,
2059         MT_USB_DEVICE(USB_VENDOR_ID_ASUS,
2060             USB_DEVICE_ID_ASUSTEK_MULTITOUCH_YFO) },
2061     { .driver_data = MT_CLS_CONFIDENCE_MINUS_ONE,
2062         MT_USB_DEVICE(USB_VENDOR_ID_TURBOX,
2063             USB_DEVICE_ID_TURBOX_TOUCHSCREEN_MOSART) },
2064
2065     /* Novatek Panel */
2066     { .driver_data = MT_CLS_NSMU,
2067         MT_USB_DEVICE(USB_VENDOR_ID_NOVATEK,
2068             USB_DEVICE_ID_NOVATEK_PCT) },
2069
2070     /* Ntrig Panel */
2071     { .driver_data = MT_CLS_NSMU,
2072         HID_DEVICE(BUS_I2C, HID_GROUP_MULTITOUCH_WIN_8,
2073             USB_VENDOR_ID_NTRIG, 0x1b05) },
2074
2075     /* Panasonic panels */
2076     { .driver_data = MT_CLS_PANASONIC,
2077         MT_USB_DEVICE(USB_VENDOR_ID_PANASONIC,
2078             USB_DEVICE_ID_PANABOARD_UBT780) },
2079     { .driver_data = MT_CLS_PANASONIC,
2080         MT_USB_DEVICE(USB_VENDOR_ID_PANASONIC,
2081             USB_DEVICE_ID_PANABOARD_UBT880) },
2082
2083     /* PixArt optical touch screen */
2084     { .driver_data = MT_CLS_INRANGE_CONTACTNUMBER,
2085         MT_USB_DEVICE(USB_VENDOR_ID_PIXART,
2086             USB_DEVICE_ID_PIXART_OPTICAL_TOUCH_SCREEN) },
2087     { .driver_data = MT_CLS_INRANGE_CONTACTNUMBER,
2088         MT_USB_DEVICE(USB_VENDOR_ID_PIXART,
2089             USB_DEVICE_ID_PIXART_OPTICAL_TOUCH_SCREEN1) },
2090     { .driver_data = MT_CLS_INRANGE_CONTACTNUMBER,
2091         MT_USB_DEVICE(USB_VENDOR_ID_PIXART,
2092             USB_DEVICE_ID_PIXART_OPTICAL_TOUCH_SCREEN2) },
2093
2094     /* PixCir-based panels */
2095     { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTID,
2096         MT_USB_DEVICE(USB_VENDOR_ID_CANDO,
2097             USB_DEVICE_ID_CANDO_PIXCIR_MULTI_TOUCH) },
2098
2099     /* Quanta-based panels */
2100     { .driver_data = MT_CLS_CONFIDENCE_CONTACT_ID,
2101         MT_USB_DEVICE(USB_VENDOR_ID_QUANTA,
2102             USB_DEVICE_ID_QUANTA_OPTICAL_TOUCH_3001) },
2103
2104     /* Razer touchpads */
2105     { .driver_data = MT_CLS_RAZER_BLADE_STEALTH,
2106         HID_DEVICE(BUS_I2C, HID_GROUP_MULTITOUCH_WIN_8,
2107             USB_VENDOR_ID_SYNAPTICS, 0x8323) },
2108
2109     /* Smart Tech panels */
2110     { .driver_data = MT_CLS_SMART_TECH,
2111         MT_USB_DEVICE(0x0b8c, 0x0092)},
2112
2113     /* Stantum panels */
2114     { .driver_data = MT_CLS_CONFIDENCE,
2115         MT_USB_DEVICE(USB_VENDOR_ID_STANTUM_STM,
2116             USB_DEVICE_ID_MTP_STM)},
2117
2118     /* Synaptics devices */
2119     { .driver_data = MT_CLS_WIN_8_FORCE_MULTI_INPUT,
2120         HID_DEVICE(BUS_I2C, HID_GROUP_MULTITOUCH_WIN_8,
2121             USB_VENDOR_ID_SYNAPTICS, 0xce08) },
2122
2123     { .driver_data = MT_CLS_WIN_8_FORCE_MULTI_INPUT,
2124         HID_DEVICE(BUS_I2C, HID_GROUP_MULTITOUCH_WIN_8,
2125             USB_VENDOR_ID_SYNAPTICS, 0xce09) },
2126
2127     /* TopSeed panels */
2128     { .driver_data = MT_CLS_TOPSEED,
2129         MT_USB_DEVICE(USB_VENDOR_ID_TOPSEED2,
2130             USB_DEVICE_ID_TOPSEED2_PERIPAD_701) },
2131
2132     /* Touch International panels */
2133     { .driver_data = MT_CLS_NSMU,
2134         MT_USB_DEVICE(USB_VENDOR_ID_TOUCH_INTL,
2135             USB_DEVICE_ID_TOUCH_INTL_MULTI_TOUCH) },
2136
2137     /* Unitec panels */
2138     { .driver_data = MT_CLS_NSMU,
2139         MT_USB_DEVICE(USB_VENDOR_ID_UNITEC,
2140             USB_DEVICE_ID_UNITEC_USB_TOUCH_0709) },
2141     { .driver_data = MT_CLS_NSMU,
2142         MT_USB_DEVICE(USB_VENDOR_ID_UNITEC,
2143             USB_DEVICE_ID_UNITEC_USB_TOUCH_0A19) },
2144
2145     /* VTL panels */
2146     { .driver_data = MT_CLS_VTL,
2147         MT_USB_DEVICE(USB_VENDOR_ID_VTL,
2148             USB_DEVICE_ID_VTL_MULTITOUCH_FF3F) },
2149
2150     /* Winbond Electronics Corp. */
2151     { .driver_data = MT_CLS_WIN_8_NO_STICKY_FINGERS,
2152         HID_DEVICE(HID_BUS_ANY, HID_GROUP_MULTITOUCH_WIN_8,
2153                USB_VENDOR_ID_WINBOND, USB_DEVICE_ID_TSTP_MTOUCH) },
2154
2155     /* Wistron panels */
2156     { .driver_data = MT_CLS_NSMU,
2157         MT_USB_DEVICE(USB_VENDOR_ID_WISTRON,
2158             USB_DEVICE_ID_WISTRON_OPTICAL_TOUCH) },
2159
2160     /* XAT */
2161     { .driver_data = MT_CLS_NSMU,
2162         MT_USB_DEVICE(USB_VENDOR_ID_XAT,
2163             USB_DEVICE_ID_XAT_CSR) },
2164
2165     /* Xiroku */
2166     { .driver_data = MT_CLS_NSMU,
2167         MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
2168             USB_DEVICE_ID_XIROKU_SPX) },
2169     { .driver_data = MT_CLS_NSMU,
2170         MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
2171             USB_DEVICE_ID_XIROKU_MPX) },
2172     { .driver_data = MT_CLS_NSMU,
2173         MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
2174             USB_DEVICE_ID_XIROKU_CSR) },
2175     { .driver_data = MT_CLS_NSMU,
2176         MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
2177             USB_DEVICE_ID_XIROKU_SPX1) },
2178     { .driver_data = MT_CLS_NSMU,
2179         MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
2180             USB_DEVICE_ID_XIROKU_MPX1) },
2181     { .driver_data = MT_CLS_NSMU,
2182         MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
2183             USB_DEVICE_ID_XIROKU_CSR1) },
2184     { .driver_data = MT_CLS_NSMU,
2185         MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
2186             USB_DEVICE_ID_XIROKU_SPX2) },
2187     { .driver_data = MT_CLS_NSMU,
2188         MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
2189             USB_DEVICE_ID_XIROKU_MPX2) },
2190     { .driver_data = MT_CLS_NSMU,
2191         MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
2192             USB_DEVICE_ID_XIROKU_CSR2) },
2193
2194     /* Google MT devices */
2195     { .driver_data = MT_CLS_GOOGLE,
2196         HID_DEVICE(HID_BUS_ANY, HID_GROUP_ANY, USB_VENDOR_ID_GOOGLE,
2197             USB_DEVICE_ID_GOOGLE_TOUCH_ROSE) },
2198     { .driver_data = MT_CLS_GOOGLE,
2199         HID_DEVICE(BUS_USB, HID_GROUP_MULTITOUCH_WIN_8, USB_VENDOR_ID_GOOGLE,
2200             USB_DEVICE_ID_GOOGLE_WHISKERS) },
2201
2202     /* Generic MT device */
2203     { HID_DEVICE(HID_BUS_ANY, HID_GROUP_MULTITOUCH, HID_ANY_ID, HID_ANY_ID) },
2204
2205     /* Generic Win 8 certified MT device */
2206     {  .driver_data = MT_CLS_WIN_8,
2207         HID_DEVICE(HID_BUS_ANY, HID_GROUP_MULTITOUCH_WIN_8,
2208             HID_ANY_ID, HID_ANY_ID) },
2209     { }
2210 };
2211 MODULE_DEVICE_TABLE(hid, mt_devices);
2212
2213 static const struct hid_usage_id mt_grabbed_usages[] = {
2214     { HID_ANY_ID, HID_ANY_ID, HID_ANY_ID },
2215     { HID_ANY_ID - 1, HID_ANY_ID - 1, HID_ANY_ID - 1}
2216 };
2217
2218 static struct hid_driver mt_driver = {
2219     .name = "hid-multitouch",
2220     .id_table = mt_devices,
2221     .probe = mt_probe,
2222     .remove = mt_remove,
2223     .input_mapping = mt_input_mapping,
2224     .input_mapped = mt_input_mapped,
2225     .input_configured = mt_input_configured,
2226     .feature_mapping = mt_feature_mapping,
2227     .usage_table = mt_grabbed_usages,
2228     .event = mt_event,
2229     .report = mt_report,
2230 #ifdef CONFIG_PM
2231     .suspend = mt_suspend,
2232     .reset_resume = mt_reset_resume,
2233     .resume = mt_resume,
2234 #endif
2235 };
2236 module_hid_driver(mt_driver);