423 lines
11 KiB
C
423 lines
11 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* HID driver for UC-Logic devices not fully compliant with HID standard
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*
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* Copyright (c) 2010-2014 Nikolai Kondrashov
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* Copyright (c) 2013 Martin Rusko
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*/
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/*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the Free
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* Software Foundation; either version 2 of the License, or (at your option)
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* any later version.
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*/
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#include <linux/device.h>
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#include <linux/hid.h>
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#include <linux/module.h>
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#include <linux/timer.h>
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#include "usbhid/usbhid.h"
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#include "hid-uclogic-params.h"
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#include "hid-ids.h"
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/* Driver data */
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struct uclogic_drvdata {
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/* Interface parameters */
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struct uclogic_params params;
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/* Pointer to the replacement report descriptor. NULL if none. */
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__u8 *desc_ptr;
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/*
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* Size of the replacement report descriptor.
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* Only valid if desc_ptr is not NULL
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*/
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unsigned int desc_size;
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/* Pen input device */
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struct input_dev *pen_input;
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/* In-range timer */
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struct timer_list inrange_timer;
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/* Last rotary encoder state, or U8_MAX for none */
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u8 re_state;
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};
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/**
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* uclogic_inrange_timeout - handle pen in-range state timeout.
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* Emulate input events normally generated when pen goes out of range for
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* tablets which don't report that.
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*
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* @t: The timer the timeout handler is attached to, stored in a struct
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* uclogic_drvdata.
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*/
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static void uclogic_inrange_timeout(struct timer_list *t)
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{
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struct uclogic_drvdata *drvdata = from_timer(drvdata, t,
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inrange_timer);
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struct input_dev *input = drvdata->pen_input;
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if (input == NULL)
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return;
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input_report_abs(input, ABS_PRESSURE, 0);
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/* If BTN_TOUCH state is changing */
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if (test_bit(BTN_TOUCH, input->key)) {
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input_event(input, EV_MSC, MSC_SCAN,
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/* Digitizer Tip Switch usage */
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0xd0042);
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input_report_key(input, BTN_TOUCH, 0);
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}
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input_report_key(input, BTN_TOOL_PEN, 0);
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input_sync(input);
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}
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static __u8 *uclogic_report_fixup(struct hid_device *hdev, __u8 *rdesc,
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unsigned int *rsize)
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{
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struct uclogic_drvdata *drvdata = hid_get_drvdata(hdev);
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if (drvdata->desc_ptr != NULL) {
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rdesc = drvdata->desc_ptr;
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*rsize = drvdata->desc_size;
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}
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return rdesc;
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}
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static int uclogic_input_mapping(struct hid_device *hdev,
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struct hid_input *hi,
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struct hid_field *field,
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struct hid_usage *usage,
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unsigned long **bit,
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int *max)
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{
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struct uclogic_drvdata *drvdata = hid_get_drvdata(hdev);
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struct uclogic_params *params = &drvdata->params;
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/* discard the unused pen interface */
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if (params->pen_unused && (field->application == HID_DG_PEN))
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return -1;
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/* let hid-core decide what to do */
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return 0;
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}
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static int uclogic_input_configured(struct hid_device *hdev,
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struct hid_input *hi)
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{
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struct uclogic_drvdata *drvdata = hid_get_drvdata(hdev);
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struct uclogic_params *params = &drvdata->params;
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char *name;
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const char *suffix = NULL;
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struct hid_field *field;
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size_t len;
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/* no report associated (HID_QUIRK_MULTI_INPUT not set) */
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if (!hi->report)
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return 0;
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/*
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* If this is the input corresponding to the pen report
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* in need of tweaking.
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*/
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if (hi->report->id == params->pen.id) {
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/* Remember the input device so we can simulate events */
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drvdata->pen_input = hi->input;
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}
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field = hi->report->field[0];
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switch (field->application) {
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case HID_GD_KEYBOARD:
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suffix = "Keyboard";
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break;
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case HID_GD_MOUSE:
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suffix = "Mouse";
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break;
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case HID_GD_KEYPAD:
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suffix = "Pad";
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break;
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case HID_DG_PEN:
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suffix = "Pen";
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break;
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case HID_CP_CONSUMER_CONTROL:
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suffix = "Consumer Control";
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break;
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case HID_GD_SYSTEM_CONTROL:
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suffix = "System Control";
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break;
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}
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if (suffix) {
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len = strlen(hdev->name) + 2 + strlen(suffix);
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name = devm_kzalloc(&hi->input->dev, len, GFP_KERNEL);
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if (name) {
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snprintf(name, len, "%s %s", hdev->name, suffix);
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hi->input->name = name;
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}
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}
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return 0;
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}
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static int uclogic_probe(struct hid_device *hdev,
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const struct hid_device_id *id)
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{
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int rc;
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struct uclogic_drvdata *drvdata = NULL;
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bool params_initialized = false;
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/*
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* libinput requires the pad interface to be on a different node
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* than the pen, so use QUIRK_MULTI_INPUT for all tablets.
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*/
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hdev->quirks |= HID_QUIRK_MULTI_INPUT;
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/* Allocate and assign driver data */
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drvdata = devm_kzalloc(&hdev->dev, sizeof(*drvdata), GFP_KERNEL);
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if (drvdata == NULL) {
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rc = -ENOMEM;
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goto failure;
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}
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timer_setup(&drvdata->inrange_timer, uclogic_inrange_timeout, 0);
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drvdata->re_state = U8_MAX;
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hid_set_drvdata(hdev, drvdata);
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/* Initialize the device and retrieve interface parameters */
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rc = uclogic_params_init(&drvdata->params, hdev);
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if (rc != 0) {
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hid_err(hdev, "failed probing parameters: %d\n", rc);
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goto failure;
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}
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params_initialized = true;
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hid_dbg(hdev, "parameters:\n" UCLOGIC_PARAMS_FMT_STR,
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UCLOGIC_PARAMS_FMT_ARGS(&drvdata->params));
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if (drvdata->params.invalid) {
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hid_info(hdev, "interface is invalid, ignoring\n");
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rc = -ENODEV;
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goto failure;
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}
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/* Generate replacement report descriptor */
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rc = uclogic_params_get_desc(&drvdata->params,
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&drvdata->desc_ptr,
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&drvdata->desc_size);
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if (rc) {
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hid_err(hdev,
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"failed generating replacement report descriptor: %d\n",
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rc);
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goto failure;
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}
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rc = hid_parse(hdev);
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if (rc) {
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hid_err(hdev, "parse failed\n");
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goto failure;
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}
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rc = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
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if (rc) {
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hid_err(hdev, "hw start failed\n");
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goto failure;
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}
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return 0;
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failure:
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/* Assume "remove" might not be called if "probe" failed */
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if (params_initialized)
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uclogic_params_cleanup(&drvdata->params);
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return rc;
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}
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#ifdef CONFIG_PM
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static int uclogic_resume(struct hid_device *hdev)
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{
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int rc;
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struct uclogic_params params;
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/* Re-initialize the device, but discard parameters */
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rc = uclogic_params_init(¶ms, hdev);
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if (rc != 0)
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hid_err(hdev, "failed to re-initialize the device\n");
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else
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uclogic_params_cleanup(¶ms);
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return rc;
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}
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#endif
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static int uclogic_raw_event(struct hid_device *hdev,
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struct hid_report *report,
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u8 *data, int size)
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{
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struct uclogic_drvdata *drvdata = hid_get_drvdata(hdev);
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struct uclogic_params *params = &drvdata->params;
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/* Tweak pen reports, if necessary */
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if (!params->pen_unused &&
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(report->type == HID_INPUT_REPORT) &&
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(report->id == params->pen.id) &&
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(size >= 2)) {
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/* If it's the "virtual" frame controls report */
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if (params->frame.id != 0 &&
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data[1] & params->pen_frame_flag) {
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/* Change to virtual frame controls report ID */
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data[0] = params->frame.id;
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return 0;
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}
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/* If in-range reports are inverted */
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if (params->pen.inrange ==
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UCLOGIC_PARAMS_PEN_INRANGE_INVERTED) {
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/* Invert the in-range bit */
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data[1] ^= 0x40;
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}
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/*
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* If report contains fragmented high-resolution pen
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* coordinates
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*/
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if (size >= 10 && params->pen.fragmented_hires) {
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u8 pressure_low_byte;
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u8 pressure_high_byte;
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/* Lift pressure bytes */
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pressure_low_byte = data[6];
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pressure_high_byte = data[7];
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/*
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* Move Y coord to make space for high-order X
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* coord byte
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*/
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data[6] = data[5];
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data[5] = data[4];
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/* Move high-order X coord byte */
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data[4] = data[8];
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/* Move high-order Y coord byte */
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data[7] = data[9];
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/* Place pressure bytes */
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data[8] = pressure_low_byte;
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data[9] = pressure_high_byte;
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}
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/* If we need to emulate in-range detection */
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if (params->pen.inrange == UCLOGIC_PARAMS_PEN_INRANGE_NONE) {
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/* Set in-range bit */
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data[1] |= 0x40;
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/* (Re-)start in-range timeout */
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mod_timer(&drvdata->inrange_timer,
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jiffies + msecs_to_jiffies(100));
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}
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}
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/* Tweak frame control reports, if necessary */
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if ((report->type == HID_INPUT_REPORT) &&
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(report->id == params->frame.id)) {
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/* If need to, and can, set pad device ID for Wacom drivers */
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if (params->frame.dev_id_byte > 0 &&
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params->frame.dev_id_byte < size) {
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data[params->frame.dev_id_byte] = 0xf;
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}
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/* If need to, and can, read rotary encoder state change */
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if (params->frame.re_lsb > 0 &&
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params->frame.re_lsb / 8 < size) {
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unsigned int byte = params->frame.re_lsb / 8;
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unsigned int bit = params->frame.re_lsb % 8;
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u8 change;
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u8 prev_state = drvdata->re_state;
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/* Read Gray-coded state */
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u8 state = (data[byte] >> bit) & 0x3;
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/* Encode state change into 2-bit signed integer */
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if ((prev_state == 1 && state == 0) ||
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(prev_state == 2 && state == 3)) {
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change = 1;
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} else if ((prev_state == 2 && state == 0) ||
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(prev_state == 1 && state == 3)) {
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change = 3;
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} else {
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change = 0;
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}
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/* Write change */
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data[byte] = (data[byte] & ~((u8)3 << bit)) |
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(change << bit);
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/* Remember state */
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drvdata->re_state = state;
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}
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}
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return 0;
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}
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static void uclogic_remove(struct hid_device *hdev)
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{
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struct uclogic_drvdata *drvdata = hid_get_drvdata(hdev);
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del_timer_sync(&drvdata->inrange_timer);
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hid_hw_stop(hdev);
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kfree(drvdata->desc_ptr);
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uclogic_params_cleanup(&drvdata->params);
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}
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static const struct hid_device_id uclogic_devices[] = {
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{ HID_USB_DEVICE(USB_VENDOR_ID_UCLOGIC,
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USB_DEVICE_ID_UCLOGIC_TABLET_PF1209) },
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{ HID_USB_DEVICE(USB_VENDOR_ID_UCLOGIC,
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USB_DEVICE_ID_UCLOGIC_TABLET_WP4030U) },
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{ HID_USB_DEVICE(USB_VENDOR_ID_UCLOGIC,
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USB_DEVICE_ID_UCLOGIC_TABLET_WP5540U) },
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{ HID_USB_DEVICE(USB_VENDOR_ID_UCLOGIC,
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USB_DEVICE_ID_UCLOGIC_TABLET_WP8060U) },
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{ HID_USB_DEVICE(USB_VENDOR_ID_UCLOGIC,
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USB_DEVICE_ID_UCLOGIC_TABLET_WP1062) },
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{ HID_USB_DEVICE(USB_VENDOR_ID_UCLOGIC,
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USB_DEVICE_ID_UCLOGIC_WIRELESS_TABLET_TWHL850) },
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{ HID_USB_DEVICE(USB_VENDOR_ID_UCLOGIC,
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USB_DEVICE_ID_UCLOGIC_TABLET_TWHA60) },
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{ HID_USB_DEVICE(USB_VENDOR_ID_HUION,
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USB_DEVICE_ID_HUION_TABLET) },
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{ HID_USB_DEVICE(USB_VENDOR_ID_HUION,
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USB_DEVICE_ID_HUION_HS64) },
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{ HID_USB_DEVICE(USB_VENDOR_ID_UCLOGIC,
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USB_DEVICE_ID_HUION_TABLET) },
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{ HID_USB_DEVICE(USB_VENDOR_ID_UCLOGIC,
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USB_DEVICE_ID_YIYNOVA_TABLET) },
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{ HID_USB_DEVICE(USB_VENDOR_ID_UCLOGIC,
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USB_DEVICE_ID_UCLOGIC_UGEE_TABLET_81) },
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{ HID_USB_DEVICE(USB_VENDOR_ID_UCLOGIC,
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USB_DEVICE_ID_UCLOGIC_UGEE_TABLET_45) },
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{ HID_USB_DEVICE(USB_VENDOR_ID_UCLOGIC,
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USB_DEVICE_ID_UCLOGIC_UGEE_TABLET_47) },
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{ HID_USB_DEVICE(USB_VENDOR_ID_UCLOGIC,
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USB_DEVICE_ID_UCLOGIC_DRAWIMAGE_G3) },
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{ HID_USB_DEVICE(USB_VENDOR_ID_UGTIZER,
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USB_DEVICE_ID_UGTIZER_TABLET_GP0610) },
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{ HID_USB_DEVICE(USB_VENDOR_ID_UGEE,
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USB_DEVICE_ID_UGEE_TABLET_G5) },
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{ HID_USB_DEVICE(USB_VENDOR_ID_UGEE,
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USB_DEVICE_ID_UGEE_TABLET_EX07S) },
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{ HID_USB_DEVICE(USB_VENDOR_ID_UGEE,
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USB_DEVICE_ID_UGEE_TABLET_RAINBOW_CV720) },
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{ HID_USB_DEVICE(USB_VENDOR_ID_UGEE,
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USB_DEVICE_ID_UGEE_XPPEN_TABLET_G540) },
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{ HID_USB_DEVICE(USB_VENDOR_ID_UGEE,
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USB_DEVICE_ID_UGEE_XPPEN_TABLET_G640) },
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{ HID_USB_DEVICE(USB_VENDOR_ID_UGEE,
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USB_DEVICE_ID_UGEE_XPPEN_TABLET_DECO01) },
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{ }
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};
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MODULE_DEVICE_TABLE(hid, uclogic_devices);
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static struct hid_driver uclogic_driver = {
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.name = "uclogic",
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.id_table = uclogic_devices,
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.probe = uclogic_probe,
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.remove = uclogic_remove,
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.report_fixup = uclogic_report_fixup,
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.raw_event = uclogic_raw_event,
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.input_mapping = uclogic_input_mapping,
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.input_configured = uclogic_input_configured,
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#ifdef CONFIG_PM
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.resume = uclogic_resume,
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.reset_resume = uclogic_resume,
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#endif
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};
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module_hid_driver(uclogic_driver);
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MODULE_AUTHOR("Martin Rusko");
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MODULE_AUTHOR("Nikolai Kondrashov");
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MODULE_LICENSE("GPL");
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