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-rw-r--r--drivers/hid/hid-uclogic-core.c428
1 files changed, 428 insertions, 0 deletions
diff --git a/drivers/hid/hid-uclogic-core.c b/drivers/hid/hid-uclogic-core.c
new file mode 100644
index 000000000..e4811d37c
--- /dev/null
+++ b/drivers/hid/hid-uclogic-core.c
@@ -0,0 +1,428 @@
+// 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"
+
+/* Driver data */
+struct uclogic_drvdata {
+ /* Interface parameters */
+ struct uclogic_params params;
+ /* Pointer to the replacement report descriptor. NULL if none. */
+ __u8 *desc_ptr;
+ /*
+ * Size of the replacement report descriptor.
+ * Only valid if desc_ptr is not NULL
+ */
+ unsigned int desc_size;
+ /* Pen input device */
+ struct input_dev *pen_input;
+ /* In-range timer */
+ struct timer_list inrange_timer;
+ /* Last rotary encoder state, or U8_MAX for none */
+ u8 re_state;
+};
+
+/**
+ * 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 __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) {
+ rdesc = drvdata->desc_ptr;
+ *rsize = drvdata->desc_size;
+ }
+ 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 the unused pen interface */
+ if (params->pen_unused && (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;
+ char *name;
+ const char *suffix = NULL;
+ struct hid_field *field;
+ size_t len;
+
+ /* 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;
+ }
+
+ 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:
+ suffix = "Pen";
+ break;
+ case HID_CP_CONSUMER_CONTROL:
+ suffix = "Consumer Control";
+ break;
+ case HID_GD_SYSTEM_CONTROL:
+ suffix = "System Control";
+ break;
+ }
+
+ if (suffix) {
+ len = strlen(hdev->name) + 2 + strlen(suffix);
+ name = devm_kzalloc(&hi->input->dev, len, GFP_KERNEL);
+ if (name) {
+ snprintf(name, len, "%s %s", hdev->name, suffix);
+ hi->input->name = name;
+ }
+ }
+
+ 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;
+ 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_FMT_STR,
+ UCLOGIC_PARAMS_FMT_ARGS(&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(&params, hdev);
+ if (rc != 0)
+ hid_err(hdev, "failed to re-initialize the device\n");
+ else
+ uclogic_params_cleanup(&params);
+
+ return rc;
+}
+#endif
+
+static int uclogic_raw_event(struct hid_device *hdev,
+ struct hid_report *report,
+ u8 *data, int size)
+{
+ struct uclogic_drvdata *drvdata = hid_get_drvdata(hdev);
+ struct uclogic_params *params = &drvdata->params;
+
+ /* Tweak pen reports, if necessary */
+ if (!params->pen_unused &&
+ (report->type == HID_INPUT_REPORT) &&
+ (report->id == params->pen.id) &&
+ (size >= 2)) {
+ /* If it's the "virtual" frame controls report */
+ if (params->frame.id != 0 &&
+ data[1] & params->pen_frame_flag) {
+ /* Change to virtual frame controls report ID */
+ data[0] = params->frame.id;
+ return 0;
+ }
+ /* If in-range reports are inverted */
+ if (params->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 && params->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 (params->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));
+ }
+ }
+
+ /* Tweak frame control reports, if necessary */
+ if ((report->type == HID_INPUT_REPORT) &&
+ (report->id == params->frame.id)) {
+ /* If need to, and can, set pad device ID for Wacom drivers */
+ if (params->frame.dev_id_byte > 0 &&
+ params->frame.dev_id_byte < size) {
+ data[params->frame.dev_id_byte] = 0xf;
+ }
+ /* If need to, and can, read rotary encoder state change */
+ if (params->frame.re_lsb > 0 &&
+ params->frame.re_lsb / 8 < size) {
+ unsigned int byte = params->frame.re_lsb / 8;
+ unsigned int bit = params->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;
+ }
+ }
+
+ 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_HS64) },
+ { 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_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) },
+ { }
+};
+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_LICENSE("GPL");