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linux-sg2042/drivers/hid/hid-multitouch.c

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/*
* HID driver for multitouch panels
*
* Copyright (c) 2010-2012 Stephane Chatty <chatty@enac.fr>
* Copyright (c) 2010-2013 Benjamin Tissoires <benjamin.tissoires@gmail.com>
* 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 <chatty@enac.fr>
* Copyright (c) 2010 Henrik Rydberg <rydberg@euromail.se>
* Copyright (c) 2010 Canonical, Ltd.
*
* This code is partly based on hid-3m-pct.c:
*
* Copyright (c) 2009-2010 Stephane Chatty <chatty@enac.fr>
* Copyright (c) 2010 Henrik Rydberg <rydberg@euromail.se>
* Copyright (c) 2010 Canonical, Ltd.
*
*/
/*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the Free
* Software Foundation; either version 2 of the License, or (at your option)
* any later version.
*/
/*
* This driver is regularly tested thanks to the tool hid-test[1].
* This tool relies on hid-replay[2] and a database of hid devices[3].
* Please run these regression tests before patching this module so that
* your patch won't break existing known devices.
*
* [1] https://github.com/bentiss/hid-test
* [2] https://github.com/bentiss/hid-replay
* [3] https://github.com/bentiss/hid-devices
*/
#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("Stephane Chatty <chatty@enac.fr>");
MODULE_AUTHOR("Benjamin Tissoires <benjamin.tissoires@gmail.com>");
MODULE_DESCRIPTION("HID multitouch panels");
MODULE_LICENSE("GPL");
#include "hid-ids.h"
/* quirks to control the device */
#define MT_QUIRK_NOT_SEEN_MEANS_UP BIT(0)
#define MT_QUIRK_SLOT_IS_CONTACTID BIT(1)
#define MT_QUIRK_CYPRESS BIT(2)
#define MT_QUIRK_SLOT_IS_CONTACTNUMBER BIT(3)
#define MT_QUIRK_ALWAYS_VALID BIT(4)
#define MT_QUIRK_VALID_IS_INRANGE BIT(5)
#define MT_QUIRK_VALID_IS_CONFIDENCE BIT(6)
#define MT_QUIRK_CONFIDENCE BIT(7)
#define MT_QUIRK_SLOT_IS_CONTACTID_MINUS_ONE BIT(8)
#define MT_QUIRK_NO_AREA BIT(9)
#define MT_QUIRK_IGNORE_DUPLICATES BIT(10)
#define MT_QUIRK_HOVERING BIT(11)
#define MT_QUIRK_CONTACT_CNT_ACCURATE BIT(12)
#define MT_QUIRK_FORCE_GET_FEATURE BIT(13)
#define MT_QUIRK_FIX_CONST_CONTACT_ID BIT(14)
#define MT_QUIRK_TOUCH_SIZE_SCALING BIT(15)
#define MT_QUIRK_STICKY_FINGERS BIT(16)
#define MT_QUIRK_ASUS_CUSTOM_UP BIT(17)
#define MT_INPUTMODE_TOUCHSCREEN 0x02
#define MT_INPUTMODE_TOUCHPAD 0x03
#define MT_BUTTONTYPE_CLICKPAD 0
#define MT_IO_FLAGS_RUNNING 0
#define MT_IO_FLAGS_ACTIVE_SLOTS 1
#define MT_IO_FLAGS_PENDING_SLOTS 2
struct mt_slot {
__s32 x, y, cx, cy, p, w, h, a;
__s32 contactid; /* the device ContactID assigned to this slot */
bool touch_state; /* is the touch valid? */
bool inrange_state; /* is the finger in proximity of the sensor? */
bool confidence_state; /* is the touch made by a finger? */
bool has_azimuth; /* the contact reports azimuth */
};
struct mt_class {
__s32 name; /* MT_CLS */
__s32 quirks;
__s32 sn_move; /* Signal/noise ratio for move events */
__s32 sn_width; /* Signal/noise ratio for width events */
__s32 sn_height; /* Signal/noise ratio for height events */
__s32 sn_pressure; /* Signal/noise ratio for pressure events */
__u8 maxcontacts;
bool is_indirect; /* true for touchpads */
bool export_all_inputs; /* do not ignore mouse, keyboards, etc... */
};
struct mt_fields {
unsigned usages[HID_MAX_FIELDS];
unsigned int length;
};
struct mt_device {
struct mt_slot curdata; /* placeholder of incoming data */
struct mt_class mtclass; /* our mt device class */
struct timer_list release_timer; /* to release sticky fingers */
struct hid_device *hdev; /* hid_device we're attached to */
struct mt_fields *fields; /* temporary placeholder for storing the
multitouch fields */
unsigned long mt_io_flags; /* mt flags (MT_IO_FLAGS_*) */
int cc_index; /* contact count field index in the report */
int cc_value_index; /* contact count value index in the field */
int scantime_index; /* scantime field index in the report */
int scantime_val_index; /* scantime value index in the field */
int prev_scantime; /* scantime reported in the previous packet */
int left_button_state; /* left button state */
unsigned last_slot_field; /* the last field of a slot */
unsigned mt_report_id; /* the report ID of the multitouch device */
unsigned long initial_quirks; /* initial quirks state */
__s16 inputmode; /* InputMode HID feature, -1 if non-existent */
__s16 inputmode_index; /* InputMode HID feature index in the report */
__s16 maxcontact_report_id; /* Maximum Contact Number HID feature,
-1 if non-existent */
__u8 inputmode_value; /* InputMode HID feature value */
__u8 num_received; /* how many contacts we received */
__u8 num_expected; /* expected last contact index */
__u8 maxcontacts;
__u8 touches_by_report; /* how many touches are present in one report:
* 1 means we should use a serial protocol
* > 1 means hybrid (multitouch) protocol */
__u8 buttons_count; /* number of physical buttons per touchpad */
bool is_buttonpad; /* is this device a button pad? */
bool serial_maybe; /* need to check for serial protocol */
bool curvalid; /* is the current contact valid? */
unsigned mt_flags; /* flags to pass to input-mt */
__s32 dev_time; /* the scan time provided by the device */
unsigned long jiffies; /* the frame's jiffies */
int timestamp; /* the timestamp to be sent */
};
static void mt_post_parse_default_settings(struct mt_device *td);
static void mt_post_parse(struct mt_device *td);
/* classes of device behavior */
#define MT_CLS_DEFAULT 0x0001
#define MT_CLS_SERIAL 0x0002
#define MT_CLS_CONFIDENCE 0x0003
#define MT_CLS_CONFIDENCE_CONTACT_ID 0x0004
#define MT_CLS_CONFIDENCE_MINUS_ONE 0x0005
#define MT_CLS_DUAL_INRANGE_CONTACTID 0x0006
#define MT_CLS_DUAL_INRANGE_CONTACTNUMBER 0x0007
/* reserved 0x0008 */
#define MT_CLS_INRANGE_CONTACTNUMBER 0x0009
#define MT_CLS_NSMU 0x000a
/* reserved 0x0010 */
/* reserved 0x0011 */
#define MT_CLS_WIN_8 0x0012
#define MT_CLS_EXPORT_ALL_INPUTS 0x0013
#define MT_CLS_WIN_8_DUAL 0x0014
/* vendor specific classes */
#define MT_CLS_3M 0x0101
/* reserved 0x0102 */
#define MT_CLS_EGALAX 0x0103
#define MT_CLS_EGALAX_SERIAL 0x0104
#define MT_CLS_TOPSEED 0x0105
#define MT_CLS_PANASONIC 0x0106
#define MT_CLS_FLATFROG 0x0107
#define MT_CLS_GENERALTOUCH_TWOFINGERS 0x0108
#define MT_CLS_GENERALTOUCH_PWT_TENFINGERS 0x0109
#define MT_CLS_LG 0x010a
#define MT_CLS_ASUS 0x010b
#define MT_CLS_VTL 0x0110
#define MT_CLS_GOOGLE 0x0111
#define MT_DEFAULT_MAXCONTACT 10
#define MT_MAX_MAXCONTACT 250
/*
* Resync device and local timestamps after that many microseconds without
* receiving data.
*/
#define MAX_TIMESTAMP_INTERVAL 1000000
#define MT_USB_DEVICE(v, p) HID_DEVICE(BUS_USB, HID_GROUP_MULTITOUCH, v, p)
#define MT_BT_DEVICE(v, p) HID_DEVICE(BUS_BLUETOOTH, HID_GROUP_MULTITOUCH, 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_device *td)
{
if (td->curdata.contactid != 0 || td->num_received == 0)
return td->curdata.contactid;
else
return -1;
}
static struct mt_class mt_classes[] = {
{ .name = MT_CLS_DEFAULT,
.quirks = MT_QUIRK_ALWAYS_VALID |
MT_QUIRK_CONTACT_CNT_ACCURATE },
{ .name = MT_CLS_NSMU,
.quirks = MT_QUIRK_NOT_SEEN_MEANS_UP },
{ .name = MT_CLS_SERIAL,
.quirks = MT_QUIRK_ALWAYS_VALID},
{ .name = MT_CLS_CONFIDENCE,
.quirks = MT_QUIRK_VALID_IS_CONFIDENCE },
{ .name = MT_CLS_CONFIDENCE_CONTACT_ID,
.quirks = MT_QUIRK_VALID_IS_CONFIDENCE |
MT_QUIRK_SLOT_IS_CONTACTID },
{ .name = MT_CLS_CONFIDENCE_MINUS_ONE,
.quirks = MT_QUIRK_VALID_IS_CONFIDENCE |
MT_QUIRK_SLOT_IS_CONTACTID_MINUS_ONE },
{ .name = MT_CLS_DUAL_INRANGE_CONTACTID,
.quirks = MT_QUIRK_VALID_IS_INRANGE |
MT_QUIRK_SLOT_IS_CONTACTID,
.maxcontacts = 2 },
{ .name = MT_CLS_DUAL_INRANGE_CONTACTNUMBER,
.quirks = MT_QUIRK_VALID_IS_INRANGE |
MT_QUIRK_SLOT_IS_CONTACTNUMBER,
.maxcontacts = 2 },
{ .name = MT_CLS_INRANGE_CONTACTNUMBER,
.quirks = MT_QUIRK_VALID_IS_INRANGE |
MT_QUIRK_SLOT_IS_CONTACTNUMBER },
{ .name = MT_CLS_WIN_8,
.quirks = MT_QUIRK_ALWAYS_VALID |
MT_QUIRK_IGNORE_DUPLICATES |
MT_QUIRK_HOVERING |
MT_QUIRK_CONTACT_CNT_ACCURATE |
MT_QUIRK_STICKY_FINGERS },
{ .name = MT_CLS_EXPORT_ALL_INPUTS,
.quirks = MT_QUIRK_ALWAYS_VALID |
MT_QUIRK_CONTACT_CNT_ACCURATE,
.export_all_inputs = true },
{ .name = MT_CLS_WIN_8_DUAL,
.quirks = MT_QUIRK_ALWAYS_VALID |
MT_QUIRK_IGNORE_DUPLICATES |
MT_QUIRK_HOVERING |
MT_QUIRK_CONTACT_CNT_ACCURATE,
.export_all_inputs = true },
/*
* vendor specific classes
*/
{ .name = MT_CLS_3M,
.quirks = MT_QUIRK_VALID_IS_CONFIDENCE |
MT_QUIRK_SLOT_IS_CONTACTID |
MT_QUIRK_TOUCH_SIZE_SCALING,
.sn_move = 2048,
.sn_width = 128,
.sn_height = 128,
.maxcontacts = 60,
},
{ .name = MT_CLS_EGALAX,
.quirks = MT_QUIRK_SLOT_IS_CONTACTID |
MT_QUIRK_VALID_IS_INRANGE,
.sn_move = 4096,
.sn_pressure = 32,
},
{ .name = MT_CLS_EGALAX_SERIAL,
.quirks = MT_QUIRK_SLOT_IS_CONTACTID |
MT_QUIRK_ALWAYS_VALID,
.sn_move = 4096,
.sn_pressure = 32,
},
{ .name = MT_CLS_TOPSEED,
.quirks = MT_QUIRK_ALWAYS_VALID,
.is_indirect = true,
.maxcontacts = 2,
},
{ .name = MT_CLS_PANASONIC,
.quirks = MT_QUIRK_NOT_SEEN_MEANS_UP,
.maxcontacts = 4 },
{ .name = MT_CLS_GENERALTOUCH_TWOFINGERS,
.quirks = MT_QUIRK_NOT_SEEN_MEANS_UP |
MT_QUIRK_VALID_IS_INRANGE |
MT_QUIRK_SLOT_IS_CONTACTID,
.maxcontacts = 2
},
{ .name = MT_CLS_GENERALTOUCH_PWT_TENFINGERS,
.quirks = MT_QUIRK_NOT_SEEN_MEANS_UP |
MT_QUIRK_SLOT_IS_CONTACTID
},
{ .name = MT_CLS_FLATFROG,
.quirks = MT_QUIRK_NOT_SEEN_MEANS_UP |
MT_QUIRK_NO_AREA,
.sn_move = 2048,
.maxcontacts = 40,
},
{ .name = MT_CLS_LG,
.quirks = MT_QUIRK_ALWAYS_VALID |
MT_QUIRK_FIX_CONST_CONTACT_ID |
MT_QUIRK_IGNORE_DUPLICATES |
MT_QUIRK_HOVERING |
MT_QUIRK_CONTACT_CNT_ACCURATE },
{ .name = MT_CLS_ASUS,
.quirks = MT_QUIRK_ALWAYS_VALID |
MT_QUIRK_CONTACT_CNT_ACCURATE |
MT_QUIRK_ASUS_CUSTOM_UP },
{ .name = MT_CLS_VTL,
.quirks = MT_QUIRK_ALWAYS_VALID |
MT_QUIRK_CONTACT_CNT_ACCURATE |
MT_QUIRK_FORCE_GET_FEATURE,
},
{ .name = MT_CLS_GOOGLE,
.quirks = MT_QUIRK_ALWAYS_VALID |
MT_QUIRK_CONTACT_CNT_ACCURATE |
MT_QUIRK_SLOT_IS_CONTACTID |
MT_QUIRK_HOVERING
},
{ }
};
static ssize_t mt_show_quirks(struct device *dev,
struct device_attribute *attr,
char *buf)
{
struct hid_device *hdev = to_hid_device(dev);
struct mt_device *td = hid_get_drvdata(hdev);
return sprintf(buf, "%u\n", td->mtclass.quirks);
}
static ssize_t mt_set_quirks(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct hid_device *hdev = to_hid_device(dev);
struct mt_device *td = hid_get_drvdata(hdev);
unsigned long val;
if (kstrtoul(buf, 0, &val))
return -EINVAL;
td->mtclass.quirks = val;
if (td->cc_index < 0)
td->mtclass.quirks &= ~MT_QUIRK_CONTACT_CNT_ACCURATE;
return count;
}
static DEVICE_ATTR(quirks, S_IWUSR | S_IRUGO, mt_show_quirks, mt_set_quirks);
static struct attribute *sysfs_attrs[] = {
&dev_attr_quirks.attr,
NULL
};
static const struct attribute_group mt_attribute_group = {
.attrs = sysfs_attrs
};
static void mt_get_feature(struct hid_device *hdev, struct hid_report *report)
{
struct mt_device *td = hid_get_drvdata(hdev);
int ret, size = hid_report_len(report);
u8 *buf;
/*
* Do not fetch the feature report if the device has been explicitly
* marked as non-capable.
*/
if (td->initial_quirks & HID_QUIRK_NO_INIT_REPORTS)
return;
buf = hid_alloc_report_buf(report, GFP_KERNEL);
if (!buf)
return;
ret = hid_hw_raw_request(hdev, report->id, buf, size,
HID_FEATURE_REPORT, HID_REQ_GET_REPORT);
if (ret < 0) {
dev_warn(&hdev->dev, "failed to fetch feature %d\n",
report->id);
} else {
ret = hid_report_raw_event(hdev, HID_FEATURE_REPORT, buf,
size, 0);
if (ret)
dev_warn(&hdev->dev, "failed to report feature\n");
}
kfree(buf);
}
static void mt_feature_mapping(struct hid_device *hdev,
struct hid_field *field, struct hid_usage *usage)
{
struct mt_device *td = hid_get_drvdata(hdev);
switch (usage->hid) {
case HID_DG_INPUTMODE:
/* Ignore if value index is out of bounds. */
if (usage->usage_index >= field->report_count) {
dev_err(&hdev->dev, "HID_DG_INPUTMODE out of range\n");
break;
}
if (td->inputmode < 0) {
td->inputmode = field->report->id;
td->inputmode_index = usage->usage_index;
} else {
/*
* Some elan panels wrongly declare 2 input mode
* features, and silently ignore when we set the
* value in the second field. Skip the second feature
* and hope for the best.
*/
dev_info(&hdev->dev,
"Ignoring the extra HID_DG_INPUTMODE\n");
}
break;
case HID_DG_CONTACTMAX:
mt_get_feature(hdev, field->report);
td->maxcontact_report_id = field->report->id;
td->maxcontacts = field->value[0];
if (!td->maxcontacts &&
field->logical_maximum <= MT_MAX_MAXCONTACT)
td->maxcontacts = field->logical_maximum;
if (td->mtclass.maxcontacts)
/* check if the maxcontacts is given by the class */
td->maxcontacts = td->mtclass.maxcontacts;
break;
case HID_DG_BUTTONTYPE:
if (usage->usage_index >= field->report_count) {
dev_err(&hdev->dev, "HID_DG_BUTTONTYPE out of range\n");
break;
}
mt_get_feature(hdev, field->report);
if (field->value[usage->usage_index] == MT_BUTTONTYPE_CLICKPAD)
td->is_buttonpad = true;
break;
case 0xff0000c5:
/* Retrieve the Win8 blob once to enable some devices */
if (usage->usage_index == 0)
mt_get_feature(hdev, field->report);
break;
}
}
static void set_abs(struct input_dev *input, unsigned int code,
struct hid_field *field, int snratio)
{
int fmin = field->logical_minimum;
int fmax = field->logical_maximum;
int fuzz = snratio ? (fmax - fmin) / snratio : 0;
input_set_abs_params(input, code, fmin, fmax, fuzz, 0);
input_abs_set_res(input, code, hidinput_calc_abs_res(field, code));
}
static void mt_store_field(struct hid_usage *usage, struct mt_device *td,
struct hid_input *hi)
{
struct mt_fields *f = td->fields;
if (f->length >= HID_MAX_FIELDS)
return;
f->usages[f->length++] = usage->hid;
}
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_device *td = hid_get_drvdata(hdev);
struct mt_class *cls = &td->mtclass;
int code;
struct hid_usage *prev_usage = NULL;
if (field->application == HID_DG_TOUCHSCREEN)
td->mt_flags |= INPUT_MT_DIRECT;
/*
* Model touchscreens providing buttons as touchpads.
*/
if (field->application == HID_DG_TOUCHPAD ||
(usage->hid & HID_USAGE_PAGE) == HID_UP_BUTTON) {
td->mt_flags |= INPUT_MT_POINTER;
td->inputmode_value = MT_INPUTMODE_TOUCHPAD;
}
/* count the buttons on touchpads */
if ((usage->hid & HID_USAGE_PAGE) == HID_UP_BUTTON)
td->buttons_count++;
if (usage->usage_index)
prev_usage = &field->usage[usage->usage_index - 1];
switch (usage->hid & HID_USAGE_PAGE) {
case HID_UP_GENDESK:
switch (usage->hid) {
case HID_GD_X:
if (prev_usage && (prev_usage->hid == usage->hid)) {
hid_map_usage(hi, usage, bit, max,
EV_ABS, ABS_MT_TOOL_X);
set_abs(hi->input, ABS_MT_TOOL_X, field,
cls->sn_move);
} else {
hid_map_usage(hi, usage, bit, max,
EV_ABS, ABS_MT_POSITION_X);
set_abs(hi->input, ABS_MT_POSITION_X, field,
cls->sn_move);
}
mt_store_field(usage, td, hi);
return 1;
case HID_GD_Y:
if (prev_usage && (prev_usage->hid == usage->hid)) {
hid_map_usage(hi, usage, bit, max,
EV_ABS, ABS_MT_TOOL_Y);
set_abs(hi->input, ABS_MT_TOOL_Y, field,
cls->sn_move);
} else {
hid_map_usage(hi, usage, bit, max,
EV_ABS, ABS_MT_POSITION_Y);
set_abs(hi->input, ABS_MT_POSITION_Y, field,
cls->sn_move);
}
mt_store_field(usage, td, hi);
return 1;
}
return 0;
case HID_UP_DIGITIZER:
switch (usage->hid) {
case HID_DG_INRANGE:
if (cls->quirks & MT_QUIRK_HOVERING) {
hid_map_usage(hi, usage, bit, max,
EV_ABS, ABS_MT_DISTANCE);
input_set_abs_params(hi->input,
ABS_MT_DISTANCE, 0, 1, 0, 0);
}
mt_store_field(usage, td, hi);
return 1;
case HID_DG_CONFIDENCE:
if ((cls->name == MT_CLS_WIN_8 ||
cls->name == MT_CLS_WIN_8_DUAL) &&
field->application == HID_DG_TOUCHPAD)
cls->quirks |= MT_QUIRK_CONFIDENCE;
mt_store_field(usage, td, hi);
return 1;
case HID_DG_TIPSWITCH:
hid_map_usage(hi, usage, bit, max, EV_KEY, BTN_TOUCH);
input_set_capability(hi->input, EV_KEY, BTN_TOUCH);
mt_store_field(usage, td, hi);
return 1;
case HID_DG_CONTACTID:
mt_store_field(usage, td, hi);
td->touches_by_report++;
td->mt_report_id = field->report->id;
return 1;
case HID_DG_WIDTH:
hid_map_usage(hi, usage, bit, max,
EV_ABS, ABS_MT_TOUCH_MAJOR);
if (!(cls->quirks & MT_QUIRK_NO_AREA))
set_abs(hi->input, ABS_MT_TOUCH_MAJOR, field,
cls->sn_width);
mt_store_field(usage, td, hi);
return 1;
case HID_DG_HEIGHT:
hid_map_usage(hi, usage, bit, max,
EV_ABS, ABS_MT_TOUCH_MINOR);
if (!(cls->quirks & MT_QUIRK_NO_AREA)) {
set_abs(hi->input, ABS_MT_TOUCH_MINOR, field,
cls->sn_height);
/*
* Only set ABS_MT_ORIENTATION if it is not
* already set by the HID_DG_AZIMUTH usage.
*/
if (!test_bit(ABS_MT_ORIENTATION,
hi->input->absbit))
input_set_abs_params(hi->input,
ABS_MT_ORIENTATION, 0, 1, 0, 0);
}
mt_store_field(usage, td, hi);
return 1;
case HID_DG_TIPPRESSURE:
hid_map_usage(hi, usage, bit, max,
EV_ABS, ABS_MT_PRESSURE);
set_abs(hi->input, ABS_MT_PRESSURE, field,
cls->sn_pressure);
mt_store_field(usage, td, hi);
return 1;
case HID_DG_SCANTIME:
hid_map_usage(hi, usage, bit, max,
EV_MSC, MSC_TIMESTAMP);
input_set_capability(hi->input, EV_MSC, MSC_TIMESTAMP);
mt_store_field(usage, td, hi);
/* Ignore if indexes are out of bounds. */
if (field->index >= field->report->maxfield ||
usage->usage_index >= field->report_count)
return 1;
td->scantime_index = field->index;
td->scantime_val_index = usage->usage_index;
return 1;
case HID_DG_CONTACTCOUNT:
/* Ignore if indexes are out of bounds. */
if (field->index >= field->report->maxfield ||
usage->usage_index >= field->report_count)
return 1;
td->cc_index = field->index;
td->cc_value_index = usage->usage_index;
return 1;
case HID_DG_AZIMUTH:
hid_map_usage(hi, usage, bit, max,
EV_ABS, ABS_MT_ORIENTATION);
/*
* Azimuth has the range of [0, MAX) representing a full
* revolution. Set ABS_MT_ORIENTATION to a quarter of
* MAX according the definition of ABS_MT_ORIENTATION
*/
input_set_abs_params(hi->input, ABS_MT_ORIENTATION,
-field->logical_maximum / 4,
field->logical_maximum / 4,
cls->sn_move ?
field->logical_maximum / cls->sn_move : 0, 0);
mt_store_field(usage, td, hi);
return 1;
case HID_DG_CONTACTMAX:
/* we don't set td->last_slot_field as contactcount and
* contact max are global to the report */
return -1;
case HID_DG_TOUCH:
/* Legacy devices use TIPSWITCH and not TOUCH.
* Let's just ignore this field. */
return -1;
}
/* let hid-input decide for the others */
return 0;
case HID_UP_BUTTON:
code = BTN_MOUSE + ((usage->hid - 1) & HID_USAGE);
/*
* MS PTP spec says that external buttons left and right have
* usages 2 and 3.
*/
if ((cls->name == MT_CLS_WIN_8 ||
cls->name == MT_CLS_WIN_8_DUAL) &&
field->application == HID_DG_TOUCHPAD &&
(usage->hid & HID_USAGE) > 1)
code--;
hid_map_usage(hi, usage, bit, max, EV_KEY, code);
input_set_capability(hi->input, EV_KEY, code);
return 1;
case 0xff000000:
/* we do not want to map these: no input-oriented meaning */
return -1;
}
return 0;
}
static int mt_compute_slot(struct mt_device *td, struct input_dev *input)
{
__s32 quirks = td->mtclass.quirks;
if (quirks & MT_QUIRK_SLOT_IS_CONTACTID)
return td->curdata.contactid;
if (quirks & MT_QUIRK_CYPRESS)
return cypress_compute_slot(td);
if (quirks & MT_QUIRK_SLOT_IS_CONTACTNUMBER)
return td->num_received;
if (quirks & MT_QUIRK_SLOT_IS_CONTACTID_MINUS_ONE)
return td->curdata.contactid - 1;
return input_mt_get_slot_by_key(input, td->curdata.contactid);
}
/*
* this function is called when a whole contact has been processed,
* so that it can assign it to a slot and store the data there
*/
static void mt_complete_slot(struct mt_device *td, struct input_dev *input)
{
if ((td->mtclass.quirks & MT_QUIRK_CONTACT_CNT_ACCURATE) &&
td->num_received >= td->num_expected)
return;
if (td->curvalid || (td->mtclass.quirks & MT_QUIRK_ALWAYS_VALID)) {
int active;
int slotnum = mt_compute_slot(td, input);
struct mt_slot *s = &td->curdata;
struct input_mt *mt = input->mt;
if (slotnum < 0 || slotnum >= td->maxcontacts)
return;
if ((td->mtclass.quirks & MT_QUIRK_IGNORE_DUPLICATES) && mt) {
struct input_mt_slot *slot = &mt->slots[slotnum];
if (input_mt_is_active(slot) &&
input_mt_is_used(mt, slot))
return;
}
if (!(td->mtclass.quirks & MT_QUIRK_CONFIDENCE))
s->confidence_state = 1;
active = (s->touch_state || s->inrange_state) &&
s->confidence_state;
input_mt_slot(input, slotnum);
input_mt_report_slot_state(input, MT_TOOL_FINGER, active);
if (active) {
/* this finger is in proximity of the sensor */
int wide = (s->w > s->h);
int major = max(s->w, s->h);
int minor = min(s->w, s->h);
int orientation = wide;
if (s->has_azimuth)
orientation = s->a;
/*
* divided by two to match visual scale of touch
* for devices with this quirk
*/
if (td->mtclass.quirks & MT_QUIRK_TOUCH_SIZE_SCALING) {
major = major >> 1;
minor = minor >> 1;
}
input_event(input, EV_ABS, ABS_MT_POSITION_X, s->x);
input_event(input, EV_ABS, ABS_MT_POSITION_Y, s->y);
input_event(input, EV_ABS, ABS_MT_TOOL_X, s->cx);
input_event(input, EV_ABS, ABS_MT_TOOL_Y, s->cy);
input_event(input, EV_ABS, ABS_MT_DISTANCE,
!s->touch_state);
input_event(input, EV_ABS, ABS_MT_ORIENTATION,
orientation);
input_event(input, EV_ABS, ABS_MT_PRESSURE, s->p);
input_event(input, EV_ABS, ABS_MT_TOUCH_MAJOR, major);
input_event(input, EV_ABS, ABS_MT_TOUCH_MINOR, minor);
set_bit(MT_IO_FLAGS_ACTIVE_SLOTS, &td->mt_io_flags);
}
}
td->num_received++;
}
/*
* 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 input_dev *input)
{
__s32 cls = td->mtclass.name;
if (cls == MT_CLS_WIN_8 || cls == MT_CLS_WIN_8_DUAL)
input_event(input, EV_KEY, BTN_LEFT, td->left_button_state);
input_mt_sync_frame(input);
input_event(input, EV_MSC, MSC_TIMESTAMP, td->timestamp);
input_sync(input);
td->num_received = 0;
td->left_button_state = 0;
if (test_bit(MT_IO_FLAGS_ACTIVE_SLOTS, &td->mt_io_flags))
set_bit(MT_IO_FLAGS_PENDING_SLOTS, &td->mt_io_flags);
else
clear_bit(MT_IO_FLAGS_PENDING_SLOTS, &td->mt_io_flags);
clear_bit(MT_IO_FLAGS_ACTIVE_SLOTS, &td->mt_io_flags);
}
static int mt_compute_timestamp(struct mt_device *td, struct hid_field *field,
__s32 value)
{
long delta = value - td->dev_time;
unsigned long jdelta = jiffies_to_usecs(jiffies - td->jiffies);
td->jiffies = jiffies;
td->dev_time = value;
if (delta < 0)
delta += field->logical_maximum;
/* HID_DG_SCANTIME is expressed in 100us, we want it in us. */
delta *= 100;
if (jdelta > MAX_TIMESTAMP_INTERVAL)
/* No data received for a while, resync the timestamp. */
return 0;
else
return td->timestamp + delta;
}
static int mt_touch_event(struct hid_device *hid, struct hid_field *field,
struct hid_usage *usage, __s32 value)
{
/* we will handle the hidinput part later, now remains hiddev */
if (hid->claimed & HID_CLAIMED_HIDDEV && hid->hiddev_hid_event)
hid->hiddev_hid_event(hid, field, usage, value);
return 1;
}
static void mt_process_mt_event(struct hid_device *hid, struct hid_field *field,
struct hid_usage *usage, __s32 value,
bool first_packet)
{
struct mt_device *td = hid_get_drvdata(hid);
__s32 cls = td->mtclass.name;
__s32 quirks = td->mtclass.quirks;
struct input_dev *input = field->hidinput->input;
if (hid->claimed & HID_CLAIMED_INPUT) {
switch (usage->hid) {
case HID_DG_INRANGE:
if (quirks & MT_QUIRK_VALID_IS_INRANGE)
td->curvalid = value;
if (quirks & MT_QUIRK_HOVERING)
td->curdata.inrange_state = value;
break;
case HID_DG_TIPSWITCH:
if (quirks & MT_QUIRK_NOT_SEEN_MEANS_UP)
td->curvalid = value;
td->curdata.touch_state = value;
break;
case HID_DG_CONFIDENCE:
if (quirks & MT_QUIRK_CONFIDENCE)
td->curdata.confidence_state = value;
if (quirks & MT_QUIRK_VALID_IS_CONFIDENCE)
td->curvalid = value;
break;
case HID_DG_CONTACTID:
td->curdata.contactid = value;
break;
case HID_DG_TIPPRESSURE:
td->curdata.p = value;
break;
case HID_GD_X:
if (usage->code == ABS_MT_TOOL_X)
td->curdata.cx = value;
else
td->curdata.x = value;
break;
case HID_GD_Y:
if (usage->code == ABS_MT_TOOL_Y)
td->curdata.cy = value;
else
td->curdata.y = value;
break;
case HID_DG_WIDTH:
td->curdata.w = value;
break;
case HID_DG_HEIGHT:
td->curdata.h = value;
break;
case HID_DG_SCANTIME:
td->timestamp = mt_compute_timestamp(td, field, value);
break;
case HID_DG_CONTACTCOUNT:
break;
case HID_DG_AZIMUTH:
/*
* Azimuth is counter-clockwise and ranges from [0, MAX)
* (a full revolution). Convert it to clockwise ranging
* [-MAX/2, MAX/2].
*
* Note that ABS_MT_ORIENTATION require us to report
* the limit of [-MAX/4, MAX/4], but the value can go
* out of range to [-MAX/2, MAX/2] to report an upside
* down ellipsis.
*/
if (value > field->logical_maximum / 2)
value -= field->logical_maximum;
td->curdata.a = -value;
td->curdata.has_azimuth = true;
break;
case HID_DG_TOUCH:
/* do nothing */
break;
default:
/*
* For Win8 PTP touchpads we should only look at
* non finger/touch events in the first_packet of
* a (possible) multi-packet frame.
*/
if ((cls == MT_CLS_WIN_8 || cls == MT_CLS_WIN_8_DUAL) &&
!first_packet)
return;
/*
* For Win8 PTP touchpads we map both the clickpad click
* and any "external" left buttons to BTN_LEFT if a
* device claims to have both we need to report 1 for
* BTN_LEFT if either is pressed, so we or all values
* together and report the result in mt_sync_frame().
*/
if ((cls == MT_CLS_WIN_8 || cls == MT_CLS_WIN_8_DUAL) &&
usage->type == EV_KEY && usage->code == BTN_LEFT) {
td->left_button_state |= value;
return;
}
if (usage->type)
input_event(input, usage->type, usage->code,
value);
return;
}
if (usage->usage_index + 1 == field->report_count) {
/* we only take into account the last report. */
if (usage->hid == td->last_slot_field)
mt_complete_slot(td, field->hidinput->input);
}
}
}
static void mt_touch_report(struct hid_device *hid, struct hid_report *report)
{
struct mt_device *td = hid_get_drvdata(hid);
__s32 cls = td->mtclass.name;
struct hid_field *field;
bool first_packet;
unsigned count;
int r, n, scantime = 0;
/* sticky fingers release in progress, abort */
if (test_and_set_bit(MT_IO_FLAGS_RUNNING, &td->mt_io_flags))
return;
/*
* Includes multi-packet support where subsequent
* packets are sent with zero contactcount.
*/
if (td->scantime_index >= 0) {
field = report->field[td->scantime_index];
scantime = field->value[td->scantime_val_index];
}
if (td->cc_index >= 0) {
struct hid_field *field = report->field[td->cc_index];
int value = field->value[td->cc_value_index];
/*
* For Win8 PTPs the first packet (td->num_received == 0) may
* have a contactcount of 0 if there only is a button event.
* We double check that this is not a continuation packet
* of a possible multi-packet frame be checking that the
* timestamp has changed.
*/
if ((cls == MT_CLS_WIN_8 || cls == MT_CLS_WIN_8_DUAL) &&
td->num_received == 0 && td->prev_scantime != scantime)
td->num_expected = value;
/* A non 0 contact count always indicates a first packet */
else if (value)
td->num_expected = value;
}
td->prev_scantime = scantime;
first_packet = td->num_received == 0;
for (r = 0; r < report->maxfield; r++) {
field = report->field[r];
count = field->report_count;
if (!(HID_MAIN_ITEM_VARIABLE & field->flags))
continue;
for (n = 0; n < count; n++)
mt_process_mt_event(hid, field, &field->usage[n],
field->value[n], first_packet);
}
if (td->num_received >= td->num_expected)
mt_sync_frame(td, report->field[0]->hidinput->input);
/*
* Windows 8 specs says 2 things:
* - once a contact has been reported, it has to be reported in each
* subsequent report
* - the report rate when fingers are present has to be at least
* the refresh rate of the screen, 60 or 120 Hz
*
* I interprete this that the specification forces a report rate of
* at least 60 Hz for a touchscreen to be certified.
* Which means that if we do not get a report whithin 16 ms, either
* something wrong happens, either the touchscreen forgets to send
* a release. Taking a reasonable margin allows to remove issues
* with USB communication or the load of the machine.
*
* Given that Win 8 devices are forced to send a release, this will
* only affect laggish machines and the ones that have a firmware
* defect.
*/
if (td->mtclass.quirks & MT_QUIRK_STICKY_FINGERS) {
if (test_bit(MT_IO_FLAGS_PENDING_SLOTS, &td->mt_io_flags))
mod_timer(&td->release_timer,
jiffies + msecs_to_jiffies(100));
else
del_timer(&td->release_timer);
}
clear_bit(MT_IO_FLAGS_RUNNING, &td->mt_io_flags);
}
static int mt_touch_input_configured(struct hid_device *hdev,
struct hid_input *hi)
{
struct mt_device *td = hid_get_drvdata(hdev);
struct mt_class *cls = &td->mtclass;
struct input_dev *input = hi->input;
int ret;
if (!td->maxcontacts)
td->maxcontacts = MT_DEFAULT_MAXCONTACT;
mt_post_parse(td);
if (td->serial_maybe)
mt_post_parse_default_settings(td);
if (cls->is_indirect)
td->mt_flags |= INPUT_MT_POINTER;
if (cls->quirks & MT_QUIRK_NOT_SEEN_MEANS_UP)
td->mt_flags |= INPUT_MT_DROP_UNUSED;
/* check for clickpads */
if ((td->mt_flags & INPUT_MT_POINTER) && (td->buttons_count == 1))
td->is_buttonpad = true;
if (td->is_buttonpad)
__set_bit(INPUT_PROP_BUTTONPAD, input->propbit);
ret = input_mt_init_slots(input, td->maxcontacts, td->mt_flags);
if (ret)
return ret;
td->mt_flags = 0;
return 0;
}
#define mt_map_key_clear(c) hid_map_usage_clear(hi, usage, bit, \
max, EV_KEY, (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)
{
struct mt_device *td = hid_get_drvdata(hdev);
/*
* If mtclass.export_all_inputs is not set, only map fields from
* TouchScreen or TouchPad collections. We need to ignore fields
* that belong to other collections such as Mouse that might have
* the same GenericDesktop usages.
*/
if (!td->mtclass.export_all_inputs &&
field->application != HID_DG_TOUCHSCREEN &&
field->application != HID_DG_PEN &&
field->application != HID_DG_TOUCHPAD &&
field->application != HID_GD_KEYBOARD &&
field->application != HID_GD_SYSTEM_CONTROL &&
field->application != HID_CP_CONSUMER_CONTROL &&
field->application != HID_GD_WIRELESS_RADIO_CTLS &&
!(field->application == HID_VD_ASUS_CUSTOM_MEDIA_KEYS &&
td->mtclass.quirks & MT_QUIRK_ASUS_CUSTOM_UP))
return -1;
/*
* Some Asus keyboard+touchpad devices have the hotkeys defined in the
* touchpad report descriptor. We need to treat these as an array to
* map usages to input keys.
*/
if (field->application == HID_VD_ASUS_CUSTOM_MEDIA_KEYS &&
td->mtclass.quirks & MT_QUIRK_ASUS_CUSTOM_UP &&
(usage->hid & HID_USAGE_PAGE) == HID_UP_CUSTOM) {
set_bit(EV_REP, hi->input->evbit);
if (field->flags & HID_MAIN_ITEM_VARIABLE)
field->flags &= ~HID_MAIN_ITEM_VARIABLE;
switch (usage->hid & HID_USAGE) {
case 0x10: mt_map_key_clear(KEY_BRIGHTNESSDOWN); break;
case 0x20: mt_map_key_clear(KEY_BRIGHTNESSUP); break;
case 0x35: mt_map_key_clear(KEY_DISPLAY_OFF); break;
case 0x6b: mt_map_key_clear(KEY_F21); break;
case 0x6c: mt_map_key_clear(KEY_SLEEP); break;
default:
return -1;
}
return 1;
}
/*
* some egalax touchscreens have "application == HID_DG_TOUCHSCREEN"
* for the stylus.
* The check for mt_report_id ensures we don't process
* HID_DG_CONTACTCOUNT from the pen report as it is outside the physical
* collection, but within the report ID.
*/
if (field->physical == HID_DG_STYLUS)
return 0;
else if ((field->physical == 0) &&
(field->report->id != td->mt_report_id) &&
(td->mt_report_id != -1))
return 0;
if (field->application == HID_DG_TOUCHSCREEN ||
field->application == HID_DG_TOUCHPAD)
return mt_touch_input_mapping(hdev, hi, field, usage, bit, max);
/* let hid-core decide for the others */
return 0;
}
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)
{
/*
* some egalax touchscreens have "application == HID_DG_TOUCHSCREEN"
* for the stylus.
*/
if (field->physical == HID_DG_STYLUS)
return 0;
if (field->application == HID_DG_TOUCHSCREEN ||
field->application == HID_DG_TOUCHPAD) {
/* We own these mappings, tell hid-input to ignore them */
return -1;
}
/* let hid-core decide for the others */
return 0;
}
static int mt_event(struct hid_device *hid, struct hid_field *field,
struct hid_usage *usage, __s32 value)
{
struct mt_device *td = hid_get_drvdata(hid);
if (field->report->id == td->mt_report_id)
return mt_touch_event(hid, field, usage, value);
return 0;
}
static void mt_report(struct hid_device *hid, struct hid_report *report)
{
struct mt_device *td = hid_get_drvdata(hid);
struct hid_field *field = report->field[0];
if (!(hid->claimed & HID_CLAIMED_INPUT))
return;
if (report->id == td->mt_report_id)
return mt_touch_report(hid, report);
if (field && field->hidinput && field->hidinput->input)
input_sync(field->hidinput->input);
}
static void mt_set_input_mode(struct hid_device *hdev)
{
struct mt_device *td = hid_get_drvdata(hdev);
struct hid_report *r;
struct hid_report_enum *re;
struct mt_class *cls = &td->mtclass;
char *buf;
int report_len;
if (td->inputmode < 0)
return;
re = &(hdev->report_enum[HID_FEATURE_REPORT]);
r = re->report_id_hash[td->inputmode];
if (r) {
if (cls->quirks & MT_QUIRK_FORCE_GET_FEATURE) {
report_len = hid_report_len(r);
buf = hid_alloc_report_buf(r, GFP_KERNEL);
if (!buf) {
hid_err(hdev, "failed to allocate buffer for report\n");
return;
}
hid_hw_raw_request(hdev, r->id, buf, report_len,
HID_FEATURE_REPORT,
HID_REQ_GET_REPORT);
kfree(buf);
}
r->field[0]->value[td->inputmode_index] = td->inputmode_value;
hid_hw_request(hdev, r, HID_REQ_SET_REPORT);
}
}
static void mt_set_maxcontacts(struct hid_device *hdev)
{
struct mt_device *td = hid_get_drvdata(hdev);
struct hid_report *r;
struct hid_report_enum *re;
int fieldmax, max;
if (td->maxcontact_report_id < 0)
return;
if (!td->mtclass.maxcontacts)
return;
re = &hdev->report_enum[HID_FEATURE_REPORT];
r = re->report_id_hash[td->maxcontact_report_id];
if (r) {
max = td->mtclass.maxcontacts;
fieldmax = r->field[0]->logical_maximum;
max = min(fieldmax, max);
if (r->field[0]->value[0] != max) {
r->field[0]->value[0] = max;
hid_hw_request(hdev, r, HID_REQ_SET_REPORT);
}
}
}
static void mt_post_parse_default_settings(struct mt_device *td)
{
__s32 quirks = td->mtclass.quirks;
/* unknown serial device needs special quirks */
if (td->touches_by_report == 1) {
quirks |= MT_QUIRK_ALWAYS_VALID;
quirks &= ~MT_QUIRK_NOT_SEEN_MEANS_UP;
quirks &= ~MT_QUIRK_VALID_IS_INRANGE;
quirks &= ~MT_QUIRK_VALID_IS_CONFIDENCE;
quirks &= ~MT_QUIRK_CONTACT_CNT_ACCURATE;
}
td->mtclass.quirks = quirks;
}
static void mt_post_parse(struct mt_device *td)
{
struct mt_fields *f = td->fields;
struct mt_class *cls = &td->mtclass;
if (td->touches_by_report > 0) {
int field_count_per_touch = f->length / td->touches_by_report;
td->last_slot_field = f->usages[field_count_per_touch - 1];
}
if (td->cc_index < 0)
cls->quirks &= ~MT_QUIRK_CONTACT_CNT_ACCURATE;
}
static int mt_input_configured(struct hid_device *hdev, struct hid_input *hi)
{
struct mt_device *td = hid_get_drvdata(hdev);
char *name;
const char *suffix = NULL;
struct hid_field *field = hi->report->field[0];
int ret;
if (hi->report->id == td->mt_report_id) {
ret = mt_touch_input_configured(hdev, hi);
if (ret)
return ret;
}
/*
* some egalax touchscreens have "application == HID_DG_TOUCHSCREEN"
* for the stylus. Check this first, and then rely on the application
* field.
*/
if (hi->report->field[0]->physical == HID_DG_STYLUS) {
suffix = "Pen";
/* force BTN_STYLUS to allow tablet matching in udev */
__set_bit(BTN_STYLUS, hi->input->keybit);
} else {
switch (field->application) {
case HID_GD_KEYBOARD:
suffix = "Keyboard";
break;
case HID_GD_KEYPAD:
suffix = "Keypad";
break;
case HID_GD_MOUSE:
suffix = "Mouse";
break;
case HID_DG_STYLUS:
suffix = "Pen";
/* force BTN_STYLUS to allow tablet matching in udev */
__set_bit(BTN_STYLUS, hi->input->keybit);
break;
case HID_DG_TOUCHSCREEN:
/* we do not set suffix = "Touchscreen" */
break;
case HID_DG_TOUCHPAD:
suffix = "Touchpad";
break;
case HID_GD_SYSTEM_CONTROL:
suffix = "System Control";
break;
case HID_CP_CONSUMER_CONTROL:
suffix = "Consumer Control";
break;
case HID_GD_WIRELESS_RADIO_CTLS:
suffix = "Wireless Radio Control";
break;
case HID_VD_ASUS_CUSTOM_MEDIA_KEYS:
suffix = "Custom Media Keys";
break;
default:
suffix = "UNKNOWN";
break;
}
}
if (suffix) {
name = devm_kzalloc(&hi->input->dev,
strlen(hdev->name) + strlen(suffix) + 2,
GFP_KERNEL);
if (name) {
sprintf(name, "%s %s", hdev->name, suffix);
hi->input->name = name;
}
}
return 0;
}
static void mt_fix_const_field(struct hid_field *field, unsigned int usage)
{
if (field->usage[0].hid != usage ||
!(field->flags & HID_MAIN_ITEM_CONSTANT))
return;
field->flags &= ~HID_MAIN_ITEM_CONSTANT;
field->flags |= HID_MAIN_ITEM_VARIABLE;
}
static void mt_fix_const_fields(struct hid_device *hdev, unsigned int usage)
{
struct hid_report *report;
int i;
list_for_each_entry(report,
&hdev->report_enum[HID_INPUT_REPORT].report_list,
list) {
if (!report->maxfield)
continue;
for (i = 0; i < report->maxfield; i++)
if (report->field[i]->maxusage >= 1)
mt_fix_const_field(report->field[i], usage);
}
}
static void mt_release_contacts(struct hid_device *hid)
{
struct hid_input *hidinput;
struct mt_device *td = hid_get_drvdata(hid);
list_for_each_entry(hidinput, &hid->inputs, list) {
struct input_dev *input_dev = hidinput->input;
struct input_mt *mt = input_dev->mt;
int i;
if (mt) {
for (i = 0; i < mt->num_slots; i++) {
input_mt_slot(input_dev, i);
input_mt_report_slot_state(input_dev,
MT_TOOL_FINGER,
false);
}
input_mt_sync_frame(input_dev);
input_sync(input_dev);
}
}
td->num_received = 0;
}
static void mt_expired_timeout(struct timer_list *t)
{
struct mt_device *td = from_timer(td, t, release_timer);
struct hid_device *hdev = td->hdev;
/*
* An input report came in just before we release the sticky fingers,
* it will take care of the sticky fingers.
*/
if (test_and_set_bit(MT_IO_FLAGS_RUNNING, &td->mt_io_flags))
return;
if (test_bit(MT_IO_FLAGS_PENDING_SLOTS, &td->mt_io_flags))
mt_release_contacts(hdev);
clear_bit(MT_IO_FLAGS_RUNNING, &td->mt_io_flags);
}
static int mt_probe(struct hid_device *hdev, const struct hid_device_id *id)
{
int ret, i;
struct mt_device *td;
struct mt_class *mtclass = mt_classes; /* MT_CLS_DEFAULT */
for (i = 0; mt_classes[i].name ; i++) {
if (id->driver_data == mt_classes[i].name) {
mtclass = &(mt_classes[i]);
break;
}
}
td = devm_kzalloc(&hdev->dev, sizeof(struct mt_device), GFP_KERNEL);
if (!td) {
dev_err(&hdev->dev, "cannot allocate multitouch data\n");
return -ENOMEM;
}
td->hdev = hdev;
td->mtclass = *mtclass;
td->inputmode = -1;
td->maxcontact_report_id = -1;
td->inputmode_value = MT_INPUTMODE_TOUCHSCREEN;
td->cc_index = -1;
td->scantime_index = -1;
td->mt_report_id = -1;
hid_set_drvdata(hdev, td);
td->fields = devm_kzalloc(&hdev->dev, sizeof(struct mt_fields),
GFP_KERNEL);
if (!td->fields) {
dev_err(&hdev->dev, "cannot allocate multitouch fields data\n");
return -ENOMEM;
}
if (id->vendor == HID_ANY_ID && id->product == HID_ANY_ID)
td->serial_maybe = true;
/*
* Store the initial quirk state
*/
td->initial_quirks = hdev->quirks;
/* This allows the driver to correctly support devices
* that emit events over several HID messages.
*/
hdev->quirks |= HID_QUIRK_NO_INPUT_SYNC;
/*
* This allows the driver to handle different input sensors
* that emits events through different reports on the same HID
* device.
*/
hdev->quirks |= HID_QUIRK_MULTI_INPUT;
hdev->quirks |= HID_QUIRK_NO_EMPTY_INPUT;
/*
* Some multitouch screens do not like to be polled for input
* reports. Fortunately, the Win8 spec says that all touches
* should be sent during each report, making the initialization
* of input reports unnecessary. For Win7 devices, well, let's hope
* they will still be happy (this is only be a problem if a touch
* was already there while probing the device).
*
* In addition some touchpads do not behave well if we read
* all feature reports from them. Instead we prevent
* initial report fetching and then selectively fetch each
* report we are interested in.
*/
hdev->quirks |= HID_QUIRK_NO_INIT_REPORTS;
timer_setup(&td->release_timer, mt_expired_timeout, 0);
ret = hid_parse(hdev);
if (ret != 0)
return ret;
if (mtclass->quirks & MT_QUIRK_FIX_CONST_CONTACT_ID)
mt_fix_const_fields(hdev, HID_DG_CONTACTID);
ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
if (ret)
return ret;
ret = sysfs_create_group(&hdev->dev.kobj, &mt_attribute_group);
if (ret)
dev_warn(&hdev->dev, "Cannot allocate sysfs group for %s\n",
hdev->name);
mt_set_maxcontacts(hdev);
mt_set_input_mode(hdev);
/* release .fields memory as it is not used anymore */
devm_kfree(&hdev->dev, td->fields);
td->fields = NULL;
return 0;
}
#ifdef CONFIG_PM
static int mt_reset_resume(struct hid_device *hdev)
{
mt_release_contacts(hdev);
mt_set_maxcontacts(hdev);
mt_set_input_mode(hdev);
return 0;
}
static int mt_resume(struct hid_device *hdev)
{
/* Some Elan legacy devices require SET_IDLE to be set on resume.
* It should be safe to send it to other devices too.
* Tested on 3M, Stantum, Cypress, Zytronic, eGalax, and Elan panels. */
hid_hw_idle(hdev, 0, 0, HID_REQ_SET_IDLE);
return 0;
}
#endif
static void mt_remove(struct hid_device *hdev)
{
struct mt_device *td = hid_get_drvdata(hdev);
del_timer_sync(&td->release_timer);
sysfs_remove_group(&hdev->dev.kobj, &mt_attribute_group);
hid_hw_stop(hdev);
hdev->quirks = td->initial_quirks;
}
/*
* 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[] = {
/* 3M panels */
{ .driver_data = MT_CLS_3M,
MT_USB_DEVICE(USB_VENDOR_ID_3M,
USB_DEVICE_ID_3M1968) },
{ .driver_data = MT_CLS_3M,
MT_USB_DEVICE(USB_VENDOR_ID_3M,
USB_DEVICE_ID_3M2256) },
{ .driver_data = MT_CLS_3M,
MT_USB_DEVICE(USB_VENDOR_ID_3M,
USB_DEVICE_ID_3M3266) },
/* Alps devices */
{ .driver_data = MT_CLS_WIN_8_DUAL,
HID_DEVICE(BUS_I2C, HID_GROUP_MULTITOUCH_WIN_8,
USB_VENDOR_ID_ALPS_JP,
HID_DEVICE_ID_ALPS_U1_DUAL_PTP) },
{ .driver_data = MT_CLS_WIN_8_DUAL,
HID_DEVICE(BUS_I2C, HID_GROUP_MULTITOUCH_WIN_8,
USB_VENDOR_ID_ALPS_JP,
HID_DEVICE_ID_ALPS_U1_DUAL_3BTN_PTP) },
/* Lenovo X1 TAB Gen 2 */
{ .driver_data = MT_CLS_WIN_8_DUAL,
HID_DEVICE(BUS_USB, HID_GROUP_MULTITOUCH_WIN_8,
USB_VENDOR_ID_LENOVO,
USB_DEVICE_ID_LENOVO_X1_TAB) },
/* Anton devices */
{ .driver_data = MT_CLS_EXPORT_ALL_INPUTS,
MT_USB_DEVICE(USB_VENDOR_ID_ANTON,
USB_DEVICE_ID_ANTON_TOUCH_PAD) },
/* Asus T304UA */
{ .driver_data = MT_CLS_ASUS,
HID_DEVICE(BUS_USB, HID_GROUP_MULTITOUCH_WIN_8,
USB_VENDOR_ID_ASUSTEK,
USB_DEVICE_ID_ASUSTEK_T304_KEYBOARD) },
/* Atmel panels */
{ .driver_data = MT_CLS_SERIAL,
MT_USB_DEVICE(USB_VENDOR_ID_ATMEL,
USB_DEVICE_ID_ATMEL_MXT_DIGITIZER) },
/* Baanto multitouch devices */
{ .driver_data = MT_CLS_NSMU,
MT_USB_DEVICE(USB_VENDOR_ID_BAANTO,
USB_DEVICE_ID_BAANTO_MT_190W2) },
/* Cando panels */
{ .driver_data = MT_CLS_DUAL_INRANGE_CONTACTNUMBER,
MT_USB_DEVICE(USB_VENDOR_ID_CANDO,
USB_DEVICE_ID_CANDO_MULTI_TOUCH) },
{ .driver_data = MT_CLS_DUAL_INRANGE_CONTACTNUMBER,
MT_USB_DEVICE(USB_VENDOR_ID_CANDO,
USB_DEVICE_ID_CANDO_MULTI_TOUCH_15_6) },
/* Chunghwa Telecom touch panels */
{ .driver_data = MT_CLS_NSMU,
MT_USB_DEVICE(USB_VENDOR_ID_CHUNGHWAT,
USB_DEVICE_ID_CHUNGHWAT_MULTITOUCH) },
/* CJTouch panels */
{ .driver_data = MT_CLS_NSMU,
MT_USB_DEVICE(USB_VENDOR_ID_CJTOUCH,
USB_DEVICE_ID_CJTOUCH_MULTI_TOUCH_0020) },
{ .driver_data = MT_CLS_NSMU,
MT_USB_DEVICE(USB_VENDOR_ID_CJTOUCH,
USB_DEVICE_ID_CJTOUCH_MULTI_TOUCH_0040) },
/* CVTouch panels */
{ .driver_data = MT_CLS_NSMU,
MT_USB_DEVICE(USB_VENDOR_ID_CVTOUCH,
USB_DEVICE_ID_CVTOUCH_SCREEN) },
/* eGalax devices (resistive) */
{ .driver_data = MT_CLS_EGALAX,
MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_480D) },
{ .driver_data = MT_CLS_EGALAX,
MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_480E) },
/* eGalax devices (capacitive) */
{ .driver_data = MT_CLS_EGALAX_SERIAL,
MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7207) },
{ .driver_data = MT_CLS_EGALAX,
MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_720C) },
{ .driver_data = MT_CLS_EGALAX_SERIAL,
MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7224) },
{ .driver_data = MT_CLS_EGALAX_SERIAL,
MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_722A) },
{ .driver_data = MT_CLS_EGALAX_SERIAL,
MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_725E) },
{ .driver_data = MT_CLS_EGALAX_SERIAL,
MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7262) },
{ .driver_data = MT_CLS_EGALAX,
MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_726B) },
{ .driver_data = MT_CLS_EGALAX,
MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72A1) },
{ .driver_data = MT_CLS_EGALAX_SERIAL,
MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72AA) },
{ .driver_data = MT_CLS_EGALAX,
HID_USB_DEVICE(USB_VENDOR_ID_DWAV,
USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72C4) },
{ .driver_data = MT_CLS_EGALAX,
HID_USB_DEVICE(USB_VENDOR_ID_DWAV,
USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72D0) },
{ .driver_data = MT_CLS_EGALAX,
MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72FA) },
{ .driver_data = MT_CLS_EGALAX,
MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7302) },
{ .driver_data = MT_CLS_EGALAX_SERIAL,
MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7349) },
{ .driver_data = MT_CLS_EGALAX_SERIAL,
MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_73F7) },
{ .driver_data = MT_CLS_EGALAX_SERIAL,
MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_A001) },
/* Elitegroup panel */
{ .driver_data = MT_CLS_SERIAL,
MT_USB_DEVICE(USB_VENDOR_ID_ELITEGROUP,
USB_DEVICE_ID_ELITEGROUP_05D8) },
/* Flatfrog Panels */
{ .driver_data = MT_CLS_FLATFROG,
MT_USB_DEVICE(USB_VENDOR_ID_FLATFROG,
USB_DEVICE_ID_MULTITOUCH_3200) },
/* FocalTech Panels */
{ .driver_data = MT_CLS_SERIAL,
MT_USB_DEVICE(USB_VENDOR_ID_CYGNAL,
USB_DEVICE_ID_FOCALTECH_FTXXXX_MULTITOUCH) },
/* GeneralTouch panel */
{ .driver_data = MT_CLS_GENERALTOUCH_TWOFINGERS,
MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
USB_DEVICE_ID_GENERAL_TOUCH_WIN7_TWOFINGERS) },
{ .driver_data = MT_CLS_GENERALTOUCH_PWT_TENFINGERS,
MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PWT_TENFINGERS) },
{ .driver_data = MT_CLS_GENERALTOUCH_TWOFINGERS,
MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PIT_0101) },
{ .driver_data = MT_CLS_GENERALTOUCH_PWT_TENFINGERS,
MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PIT_0102) },
{ .driver_data = MT_CLS_GENERALTOUCH_PWT_TENFINGERS,
MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PIT_0106) },
{ .driver_data = MT_CLS_GENERALTOUCH_PWT_TENFINGERS,
MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PIT_010A) },
{ .driver_data = MT_CLS_GENERALTOUCH_PWT_TENFINGERS,
MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PIT_E100) },
/* Gametel game controller */
{ .driver_data = MT_CLS_NSMU,
MT_BT_DEVICE(USB_VENDOR_ID_FRUCTEL,
USB_DEVICE_ID_GAMETEL_MT_MODE) },
/* GoodTouch panels */
{ .driver_data = MT_CLS_NSMU,
MT_USB_DEVICE(USB_VENDOR_ID_GOODTOUCH,
USB_DEVICE_ID_GOODTOUCH_000f) },
/* Hanvon panels */
{ .driver_data = MT_CLS_DUAL_INRANGE_CONTACTID,
MT_USB_DEVICE(USB_VENDOR_ID_HANVON_ALT,
USB_DEVICE_ID_HANVON_ALT_MULTITOUCH) },
/* Ilitek dual touch panel */
{ .driver_data = MT_CLS_NSMU,
MT_USB_DEVICE(USB_VENDOR_ID_ILITEK,
USB_DEVICE_ID_ILITEK_MULTITOUCH) },
/* LG Melfas panel */
{ .driver_data = MT_CLS_LG,
HID_USB_DEVICE(USB_VENDOR_ID_LG,
USB_DEVICE_ID_LG_MELFAS_MT) },
/* MosArt panels */
{ .driver_data = MT_CLS_CONFIDENCE_MINUS_ONE,
MT_USB_DEVICE(USB_VENDOR_ID_ASUS,
USB_DEVICE_ID_ASUS_T91MT)},
{ .driver_data = MT_CLS_CONFIDENCE_MINUS_ONE,
MT_USB_DEVICE(USB_VENDOR_ID_ASUS,
USB_DEVICE_ID_ASUSTEK_MULTITOUCH_YFO) },
{ .driver_data = MT_CLS_CONFIDENCE_MINUS_ONE,
MT_USB_DEVICE(USB_VENDOR_ID_TURBOX,
USB_DEVICE_ID_TURBOX_TOUCHSCREEN_MOSART) },
/* Novatek Panel */
{ .driver_data = MT_CLS_NSMU,
MT_USB_DEVICE(USB_VENDOR_ID_NOVATEK,
USB_DEVICE_ID_NOVATEK_PCT) },
/* Ntrig Panel */
{ .driver_data = MT_CLS_NSMU,
HID_DEVICE(BUS_I2C, HID_GROUP_MULTITOUCH_WIN_8,
USB_VENDOR_ID_NTRIG, 0x1b05) },
/* Panasonic panels */
{ .driver_data = MT_CLS_PANASONIC,
MT_USB_DEVICE(USB_VENDOR_ID_PANASONIC,
USB_DEVICE_ID_PANABOARD_UBT780) },
{ .driver_data = MT_CLS_PANASONIC,
MT_USB_DEVICE(USB_VENDOR_ID_PANASONIC,
USB_DEVICE_ID_PANABOARD_UBT880) },
/* PixArt optical touch screen */
{ .driver_data = MT_CLS_INRANGE_CONTACTNUMBER,
MT_USB_DEVICE(USB_VENDOR_ID_PIXART,
USB_DEVICE_ID_PIXART_OPTICAL_TOUCH_SCREEN) },
{ .driver_data = MT_CLS_INRANGE_CONTACTNUMBER,
MT_USB_DEVICE(USB_VENDOR_ID_PIXART,
USB_DEVICE_ID_PIXART_OPTICAL_TOUCH_SCREEN1) },
{ .driver_data = MT_CLS_INRANGE_CONTACTNUMBER,
MT_USB_DEVICE(USB_VENDOR_ID_PIXART,
USB_DEVICE_ID_PIXART_OPTICAL_TOUCH_SCREEN2) },
/* PixCir-based panels */
{ .driver_data = MT_CLS_DUAL_INRANGE_CONTACTID,
MT_USB_DEVICE(USB_VENDOR_ID_CANDO,
USB_DEVICE_ID_CANDO_PIXCIR_MULTI_TOUCH) },
/* Quanta-based panels */
{ .driver_data = MT_CLS_CONFIDENCE_CONTACT_ID,
MT_USB_DEVICE(USB_VENDOR_ID_QUANTA,
USB_DEVICE_ID_QUANTA_OPTICAL_TOUCH_3001) },
/* Stantum panels */
{ .driver_data = MT_CLS_CONFIDENCE,
MT_USB_DEVICE(USB_VENDOR_ID_STANTUM_STM,
USB_DEVICE_ID_MTP_STM)},
/* TopSeed panels */
{ .driver_data = MT_CLS_TOPSEED,
MT_USB_DEVICE(USB_VENDOR_ID_TOPSEED2,
USB_DEVICE_ID_TOPSEED2_PERIPAD_701) },
/* Touch International panels */
{ .driver_data = MT_CLS_NSMU,
MT_USB_DEVICE(USB_VENDOR_ID_TOUCH_INTL,
USB_DEVICE_ID_TOUCH_INTL_MULTI_TOUCH) },
/* Unitec panels */
{ .driver_data = MT_CLS_NSMU,
MT_USB_DEVICE(USB_VENDOR_ID_UNITEC,
USB_DEVICE_ID_UNITEC_USB_TOUCH_0709) },
{ .driver_data = MT_CLS_NSMU,
MT_USB_DEVICE(USB_VENDOR_ID_UNITEC,
USB_DEVICE_ID_UNITEC_USB_TOUCH_0A19) },
/* VTL panels */
{ .driver_data = MT_CLS_VTL,
MT_USB_DEVICE(USB_VENDOR_ID_VTL,
USB_DEVICE_ID_VTL_MULTITOUCH_FF3F) },
/* Wistron panels */
{ .driver_data = MT_CLS_NSMU,
MT_USB_DEVICE(USB_VENDOR_ID_WISTRON,
USB_DEVICE_ID_WISTRON_OPTICAL_TOUCH) },
/* XAT */
{ .driver_data = MT_CLS_NSMU,
MT_USB_DEVICE(USB_VENDOR_ID_XAT,
USB_DEVICE_ID_XAT_CSR) },
/* Xiroku */
{ .driver_data = MT_CLS_NSMU,
MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
USB_DEVICE_ID_XIROKU_SPX) },
{ .driver_data = MT_CLS_NSMU,
MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
USB_DEVICE_ID_XIROKU_MPX) },
{ .driver_data = MT_CLS_NSMU,
MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
USB_DEVICE_ID_XIROKU_CSR) },
{ .driver_data = MT_CLS_NSMU,
MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
USB_DEVICE_ID_XIROKU_SPX1) },
{ .driver_data = MT_CLS_NSMU,
MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
USB_DEVICE_ID_XIROKU_MPX1) },
{ .driver_data = MT_CLS_NSMU,
MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
USB_DEVICE_ID_XIROKU_CSR1) },
{ .driver_data = MT_CLS_NSMU,
MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
USB_DEVICE_ID_XIROKU_SPX2) },
{ .driver_data = MT_CLS_NSMU,
MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
USB_DEVICE_ID_XIROKU_MPX2) },
{ .driver_data = MT_CLS_NSMU,
MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
USB_DEVICE_ID_XIROKU_CSR2) },
/* Google MT devices */
{ .driver_data = MT_CLS_GOOGLE,
HID_DEVICE(HID_BUS_ANY, HID_GROUP_ANY, USB_VENDOR_ID_GOOGLE,
USB_DEVICE_ID_GOOGLE_TOUCH_ROSE) },
/* Generic MT device */
{ HID_DEVICE(HID_BUS_ANY, HID_GROUP_MULTITOUCH, HID_ANY_ID, HID_ANY_ID) },
/* Generic Win 8 certified MT device */
{ .driver_data = MT_CLS_WIN_8,
HID_DEVICE(HID_BUS_ANY, HID_GROUP_MULTITOUCH_WIN_8,
HID_ANY_ID, HID_ANY_ID) },
{ }
};
MODULE_DEVICE_TABLE(hid, mt_devices);
static const struct hid_usage_id mt_grabbed_usages[] = {
{ HID_ANY_ID, HID_ANY_ID, HID_ANY_ID },
{ HID_ANY_ID - 1, HID_ANY_ID - 1, HID_ANY_ID - 1}
};
static struct hid_driver mt_driver = {
.name = "hid-multitouch",
.id_table = mt_devices,
.probe = mt_probe,
.remove = mt_remove,
.input_mapping = mt_input_mapping,
.input_mapped = mt_input_mapped,
.input_configured = mt_input_configured,
.feature_mapping = mt_feature_mapping,
.usage_table = mt_grabbed_usages,
.event = mt_event,
.report = mt_report,
#ifdef CONFIG_PM
.reset_resume = mt_reset_resume,
.resume = mt_resume,
#endif
};
module_hid_driver(mt_driver);
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