// SPDX-License-Identifier: GPL-2.0+
/*
* HID driver for UC-Logic devices not fully compliant with HID standard
*
* Copyright (c) 2010-2014 Nikolai Kondrashov
* Copyright (c) 2013 Martin Rusko
*/
/*
* 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.
*/
#include <linux/device.h>
#include <linux/hid.h>
#include <linux/module.h>
#include <linux/timer.h>
#include "usbhid/usbhid.h"
#include "hid-uclogic-params.h"
#include "hid-ids.h"
/**
* uclogic_inrange_timeout - handle pen in-range state timeout.
* Emulate input events normally generated when pen goes out of range for
* tablets which don't report that.
*
* @t: The timer the timeout handler is attached to, stored in a struct
* uclogic_drvdata.
*/
static void uclogic_inrange_timeout(struct timer_list *t)
{
struct uclogic_drvdata *drvdata = from_timer(drvdata, t,
inrange_timer);
struct input_dev *input = drvdata->pen_input;
if (input == NULL)
return;
input_report_abs(input, ABS_PRESSURE, 0);
/* If BTN_TOUCH state is changing */
if (test_bit(BTN_TOUCH, input->key)) {
input_event(input, EV_MSC, MSC_SCAN,
/* Digitizer Tip Switch usage */
0xd0042);
input_report_key(input, BTN_TOUCH, 0);
}
input_report_key(input, BTN_TOOL_PEN, 0);
input_sync(input);
}
static const __u8 *uclogic_report_fixup(struct hid_device *hdev, __u8 *rdesc,
unsigned int *rsize)
{
struct uclogic_drvdata *drvdata = hid_get_drvdata(hdev);
if (drvdata->desc_ptr != NULL) {
*rsize = drvdata->desc_size;
return drvdata->desc_ptr;
}
return rdesc;
}
static int uclogic_input_mapping(struct hid_device *hdev,
struct hid_input *hi,
struct hid_field *field,
struct hid_usage *usage,
unsigned long **bit,
int *max)
{
struct uclogic_drvdata *drvdata = hid_get_drvdata(hdev);
struct uclogic_params *params = &drvdata->params;
/* Discard invalid pen usages */
if (params->pen.usage_invalid && (field->application == HID_DG_PEN))
return -1;
/* Let hid-core decide what to do */
return 0;
}
static int uclogic_input_configured(struct hid_device *hdev,
struct hid_input *hi)
{
struct uclogic_drvdata *drvdata = hid_get_drvdata(hdev);
struct uclogic_params *params = &drvdata->params;
const char *suffix = NULL;
struct hid_field *field;
size_t i;
const struct uclogic_params_frame *frame;
/* no report associated (HID_QUIRK_MULTI_INPUT not set) */
if (!hi->report)
return 0;
/*
* If this is the input corresponding to the pen report
* in need of tweaking.
*/
if (hi->report->id == params->pen.id) {
/* Remember the input device so we can simulate events */
drvdata->pen_input = hi->input;
}
/* If it's one of the frame devices */
for (i = 0; i < ARRAY_SIZE(params->frame_list); i++) {
frame = ¶ms->frame_list[i];
if (hi->report->id == frame->id) {
/* Assign custom suffix, if any */
suffix = frame->suffix;
/*
* Disable EV_MSC reports for touch ring interfaces to
* make the Wacom driver pickup touch ring extents
*/
if (frame->touch_byte > 0)
__clear_bit(EV_MSC, hi->input->evbit);
}
}
if (!suffix) {
field = hi->report->field[0];
switch (field->application) {
case HID_GD_KEYBOARD:
suffix = "Keyboard";
break;
case HID_GD_MOUSE:
suffix = "Mouse";
break;
case HID_GD_KEYPAD:
suffix = "Pad";
break;
case HID_DG_PEN:
case HID_DG_DIGITIZER:
suffix = "Pen";
break;
case HID_CP_CONSUMER_CONTROL:
suffix = "Consumer Control";
break;
case HID_GD_SYSTEM_CONTROL:
suffix = "System Control";
break;
}
}
if (suffix)
hi->input->name = devm_kasprintf(&hdev->dev, GFP_KERNEL,
"%s %s", hdev->name, suffix);
return 0;
}
static int uclogic_probe(struct hid_device *hdev,
const struct hid_device_id *id)
{
int rc;
struct uclogic_drvdata *drvdata = NULL;
bool params_initialized = false;
if (!hid_is_usb(hdev))
return -EINVAL;
/*
* libinput requires the pad interface to be on a different node
* than the pen, so use QUIRK_MULTI_INPUT for all tablets.
*/
hdev->quirks |= HID_QUIRK_MULTI_INPUT;
hdev->quirks |= HID_QUIRK_HIDINPUT_FORCE;
/* Allocate and assign driver data */
drvdata = devm_kzalloc(&hdev->dev, sizeof(*drvdata), GFP_KERNEL);
if (drvdata == NULL) {
rc = -ENOMEM;
goto failure;
}
timer_setup(&drvdata->inrange_timer, uclogic_inrange_timeout, 0);
drvdata->re_state = U8_MAX;
drvdata->quirks = id->driver_data;
hid_set_drvdata(hdev, drvdata);
/* Initialize the device and retrieve interface parameters */
rc = uclogic_params_init(&drvdata->params, hdev);
if (rc != 0) {
hid_err(hdev, "failed probing parameters: %d\n", rc);
goto failure;
}
params_initialized = true;
hid_dbg(hdev, "parameters:\n");
uclogic_params_hid_dbg(hdev, &drvdata->params);
if (drvdata->params.invalid) {
hid_info(hdev, "interface is invalid, ignoring\n");
rc = -ENODEV;
goto failure;
}
/* Generate replacement report descriptor */
rc = uclogic_params_get_desc(&drvdata->params,
&drvdata->desc_ptr,
&drvdata->desc_size);
if (rc) {
hid_err(hdev,
"failed generating replacement report descriptor: %d\n",
rc);
goto failure;
}
rc = hid_parse(hdev);
if (rc) {
hid_err(hdev, "parse failed\n");
goto failure;
}
rc = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
if (rc) {
hid_err(hdev, "hw start failed\n");
goto failure;
}
return 0;
failure:
/* Assume "remove" might not be called if "probe" failed */
if (params_initialized)
uclogic_params_cleanup(&drvdata->params);
return rc;
}
#ifdef CONFIG_PM
static int uclogic_resume(struct hid_device *hdev)
{
int rc;
struct uclogic_params params;
/* Re-initialize the device, but discard parameters */
rc = uclogic_params_init(¶ms, hdev);
if (rc != 0)
hid_err(hdev, "failed to re-initialize the device\n");
else
uclogic_params_cleanup(¶ms);
return rc;
}
#endif
/**
* uclogic_exec_event_hook - if the received event is hooked schedules the
* associated work.
*
* @p: Tablet interface report parameters.
* @event: Raw event.
* @size: The size of event.
*
* Returns:
* Whether the event was hooked or not.
*/
static bool uclogic_exec_event_hook(struct uclogic_params *p, u8 *event, int size)
{
struct uclogic_raw_event_hook *curr;
if (!p->event_hooks)
return false;
list_for_each_entry(curr, &p->event_hooks->list, list) {
if (curr->size == size && memcmp(curr->event, event, size) == 0) {
schedule_work(&curr->work);
return true;
}
}
return false;
}
/**
* uclogic_raw_event_pen - handle raw pen events (pen HID reports).
*
* @drvdata: Driver data.
* @data: Report data buffer, can be modified.
* @size: Report data size, bytes.
*
* Returns:
* Negative value on error (stops event delivery), zero for success.
*/
static int uclogic_raw_event_pen(struct uclogic_drvdata *drvdata,
u8 *data, int size)
{
struct uclogic_params_pen *pen = &drvdata->params.pen;
WARN_ON(drvdata == NULL);
WARN_ON(data == NULL && size != 0);
/* If in-range reports are inverted */
if (pen->inrange ==
UCLOGIC_PARAMS_PEN_INRANGE_INVERTED) {
/* Invert the in-range bit */
data[1] ^= 0x40;
}
/*
* If report contains fragmented high-resolution pen
* coordinates
*/
if (size >= 10 && pen->fragmented_hires) {
u8 pressure_low_byte;
u8 pressure_high_byte;
/* Lift pressure bytes */
pressure_low_byte = data[6];
pressure_high_byte = data[7];
/*
* Move Y coord to make space for high-order X
* coord byte
*/
data[6] = data[5];
data[5] = data[4];
/* Move high-order X coord byte */
data[4] = data[8];
/* Move high-order Y coord byte */
data[7] = data[9];
/* Place pressure bytes */
data[8] = pressure_low_byte;
data[9] = pressure_high_byte;
}
/* If we need to emulate in-range detection */
if (pen->inrange == UCLOGIC_PARAMS_PEN_INRANGE_NONE) {
/* Set in-range bit */
data[1] |= 0x40;
/* (Re-)start in-range timeout */
mod_timer(&drvdata->inrange_timer,
jiffies + msecs_to_jiffies(100));
}
/* If we report tilt and Y direction is flipped */
if (size >= 12 && pen->tilt_y_flipped)
data[11] = -data[11];
return 0;
}
/**
* uclogic_raw_event_frame - handle raw frame events (frame HID reports).
*
* @drvdata: Driver data.
* @frame: The parameters of the frame controls to handle.
* @data: Report data buffer, can be modified.
* @size: Report data size, bytes.
*
* Returns:
* Negative value on error (stops event delivery), zero for success.
*/
static int uclogic_raw_event_frame(
struct uclogic_drvdata *drvdata,
const struct uclogic_params_frame *frame,
u8 *data, int size)
{
WARN_ON(drvdata == NULL);
WARN_ON(data == NULL && size != 0);
/* If need to, and can, set pad device ID for Wacom drivers */
if (frame->dev_id_byte > 0 && frame->dev_id_byte < size) {
/* If we also have a touch ring and the finger left it */
if (frame->touch_byte > 0 && frame->touch_byte < size &&
data[frame->touch_byte] == 0) {
data[frame->dev_id_byte] = 0;
} else {
data[frame->dev_id_byte] = 0xf;
}
}
/* If need to, and can, read rotary encoder state change */
if (frame->re_lsb > 0 && frame->re_lsb / 8 < size) {
unsigned int byte = frame->re_lsb / 8;
unsigned int bit = frame->re_lsb % 8;
u8 change;
u8 prev_state = drvdata->re_state;
/* Read Gray-coded state */
u8 state = (data[byte] >> bit) & 0x3;
/* Encode state change into 2-bit signed integer */
if ((prev_state == 1 && state == 0) ||
(prev_state == 2 && state == 3)) {
change = 1;
} else if ((prev_state == 2 && state == 0) ||
(prev_state == 1 && state == 3)) {
change = 3;
} else {
change = 0;
}
/* Write change */
data[byte] = (data[byte] & ~((u8)3 << bit)) |
(change << bit);
/* Remember state */
drvdata->re_state = state;
}
/* If need to, and can, transform the touch ring reports */
if (frame->touch_byte > 0 && frame->touch_byte < size) {
__s8 value = data[frame->touch_byte];
if (value != 0) {
if (frame->touch_flip_at != 0) {
value = frame->touch_flip_at - value;
if (value <= 0)
value = frame->touch_max + value;
}
data[frame->touch_byte] = value - 1;
}
}
/* If need to, and can, transform the bitmap dial reports */
if (frame->bitmap_dial_byte > 0 && frame->bitmap_dial_byte < size) {
if (data[frame->bitmap_dial_byte] == 2)
data[frame->bitmap_dial_byte] = -1;
}
return 0;
}
static int uclogic_raw_event(struct hid_device *hdev,
struct hid_report *report,
u8 *data, int size)
{
unsigned int report_id = report->id;
struct uclogic_drvdata *drvdata = hid_get_drvdata(hdev);
struct uclogic_params *params = &drvdata->params;
struct uclogic_params_pen_subreport *subreport;
struct uclogic_params_pen_subreport *subreport_list_end;
size_t i;
/* Do not handle anything but input reports */
if (report->type != HID_INPUT_REPORT)
return 0;
if (uclogic_exec_event_hook(params, data, size))
return 0;
while (true) {
/* Tweak pen reports, if necessary */
if ((report_id == params->pen.id) && (size >= 2)) {
subreport_list_end =
params->pen.subreport_list +
ARRAY_SIZE(params->pen.subreport_list);
/* Try to match a subreport */
for (subreport = params->pen.subreport_list;
subreport < subreport_list_end; subreport++) {
if (subreport->value != 0 &&
subreport->value == data[1]) {
break;
}
}
/* If a subreport matched */
if (subreport < subreport_list_end) {
/* Change to subreport ID, and restart */
report_id = data[0] = subreport->id;
continue;
} else {
return uclogic_raw_event_pen(drvdata, data, size);
}
}
/* Tweak frame control reports, if necessary */
for (i = 0; i < ARRAY_SIZE(params->frame_list); i++) {
if (report_id == params->frame_list[i].id) {
return uclogic_raw_event_frame(
drvdata, ¶ms->frame_list[i],
data, size);
}
}
break;
}
return 0;
}
static void uclogic_remove(struct hid_device *hdev)
{
struct uclogic_drvdata *drvdata = hid_get_drvdata(hdev);
del_timer_sync(&drvdata->inrange_timer);
hid_hw_stop(hdev);
kfree(drvdata->desc_ptr);
uclogic_params_cleanup(&drvdata->params);
}
static const struct hid_device_id uclogic_devices[] = {
{ HID_USB_DEVICE(USB_VENDOR_ID_UCLOGIC,
USB_DEVICE_ID_UCLOGIC_TABLET_PF1209) },
{ HID_USB_DEVICE(USB_VENDOR_ID_UCLOGIC,
USB_DEVICE_ID_UCLOGIC_TABLET_WP4030U) },
{ HID_USB_DEVICE(USB_VENDOR_ID_UCLOGIC,
USB_DEVICE_ID_UCLOGIC_TABLET_WP5540U) },
{ HID_USB_DEVICE(USB_VENDOR_ID_UCLOGIC,
USB_DEVICE_ID_UCLOGIC_TABLET_WP8060U) },
{ HID_USB_DEVICE(USB_VENDOR_ID_UCLOGIC,
USB_DEVICE_ID_UCLOGIC_TABLET_WP1062) },
{ HID_USB_DEVICE(USB_VENDOR_ID_UCLOGIC,
USB_DEVICE_ID_UCLOGIC_WIRELESS_TABLET_TWHL850) },
{ HID_USB_DEVICE(USB_VENDOR_ID_UCLOGIC,
USB_DEVICE_ID_UCLOGIC_TABLET_TWHA60) },
{ HID_USB_DEVICE(USB_VENDOR_ID_HUION,
USB_DEVICE_ID_HUION_TABLET) },
{ HID_USB_DEVICE(USB_VENDOR_ID_HUION,
USB_DEVICE_ID_HUION_TABLET2) },
{ HID_USB_DEVICE(USB_VENDOR_ID_TRUST,
USB_DEVICE_ID_TRUST_PANORA_TABLET) },
{ HID_USB_DEVICE(USB_VENDOR_ID_UCLOGIC,
USB_DEVICE_ID_HUION_TABLET) },
{ HID_USB_DEVICE(USB_VENDOR_ID_UCLOGIC,
USB_DEVICE_ID_YIYNOVA_TABLET) },
{ HID_USB_DEVICE(USB_VENDOR_ID_UCLOGIC,
USB_DEVICE_ID_UCLOGIC_UGEE_TABLET_81) },
{ HID_USB_DEVICE(USB_VENDOR_ID_UCLOGIC,
USB_DEVICE_ID_UCLOGIC_UGEE_TABLET_45) },
{ HID_USB_DEVICE(USB_VENDOR_ID_UCLOGIC,
USB_DEVICE_ID_UCLOGIC_UGEE_TABLET_47) },
{ HID_USB_DEVICE(USB_VENDOR_ID_UCLOGIC,
USB_DEVICE_ID_UCLOGIC_DRAWIMAGE_G3) },
{ HID_USB_DEVICE(USB_VENDOR_ID_UGTIZER,
USB_DEVICE_ID_UGTIZER_TABLET_GP0610) },
{ HID_USB_DEVICE(USB_VENDOR_ID_UGTIZER,
USB_DEVICE_ID_UGTIZER_TABLET_GT5040) },
{ HID_USB_DEVICE(USB_VENDOR_ID_UGEE,
USB_DEVICE_ID_UGEE_PARBLO_A610_PRO) },
{ HID_USB_DEVICE(USB_VENDOR_ID_UGEE,
USB_DEVICE_ID_UGEE_TABLET_G5) },
{ HID_USB_DEVICE(USB_VENDOR_ID_UGEE,
USB_DEVICE_ID_UGEE_TABLET_EX07S) },
{ HID_USB_DEVICE(USB_VENDOR_ID_UGEE,
USB_DEVICE_ID_UGEE_TABLET_RAINBOW_CV720) },
{ HID_USB_DEVICE(USB_VENDOR_ID_UGEE,
USB_DEVICE_ID_UGEE_XPPEN_TABLET_G540) },
{ HID_USB_DEVICE(USB_VENDOR_ID_UGEE,
USB_DEVICE_ID_UGEE_XPPEN_TABLET_G640) },
{ HID_USB_DEVICE(USB_VENDOR_ID_UGEE,
USB_DEVICE_ID_UGEE_XPPEN_TABLET_DECO01) },
{ HID_USB_DEVICE(USB_VENDOR_ID_UGEE,
USB_DEVICE_ID_UGEE_XPPEN_TABLET_DECO01_V2) },
{ HID_USB_DEVICE(USB_VENDOR_ID_UGEE,
USB_DEVICE_ID_UGEE_XPPEN_TABLET_DECO_L) },
{ HID_USB_DEVICE(USB_VENDOR_ID_UGEE,
USB_DEVICE_ID_UGEE_XPPEN_TABLET_DECO_PRO_MW),
.driver_data = UCLOGIC_MOUSE_FRAME_QUIRK | UCLOGIC_BATTERY_QUIRK },
{ HID_USB_DEVICE(USB_VENDOR_ID_UGEE,
USB_DEVICE_ID_UGEE_XPPEN_TABLET_DECO_PRO_S) },
{ HID_USB_DEVICE(USB_VENDOR_ID_UGEE,
USB_DEVICE_ID_UGEE_XPPEN_TABLET_DECO_PRO_SW),
.driver_data = UCLOGIC_MOUSE_FRAME_QUIRK | UCLOGIC_BATTERY_QUIRK },
{ HID_USB_DEVICE(USB_VENDOR_ID_UGEE,
USB_DEVICE_ID_UGEE_XPPEN_TABLET_STAR06) },
{ }
};
MODULE_DEVICE_TABLE(hid, uclogic_devices);
static struct hid_driver uclogic_driver = {
.name = "uclogic",
.id_table = uclogic_devices,
.probe = uclogic_probe,
.remove = uclogic_remove,
.report_fixup = uclogic_report_fixup,
.raw_event = uclogic_raw_event,
.input_mapping = uclogic_input_mapping,
.input_configured = uclogic_input_configured,
#ifdef CONFIG_PM
.resume = uclogic_resume,
.reset_resume = uclogic_resume,
#endif
};
module_hid_driver(uclogic_driver);
MODULE_AUTHOR("Martin Rusko");
MODULE_AUTHOR("Nikolai Kondrashov");
MODULE_DESCRIPTION("HID driver for UC-Logic devices not fully compliant with HID standard");
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("HID driver for UC-Logic devices not fully compliant with HID standard");
#ifdef CONFIG_HID_KUNIT_TEST
#include "hid-uclogic-core-test.c"
#endif
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