--- /dev/null
+/*
+ * HID driver for THQ PS3 uDraw tablet
+ *
+ * Copyright (C) 2016 Red Hat Inc. All Rights Reserved
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/device.h>
+#include <linux/hid.h>
+#include <linux/module.h>
+#include "hid-ids.h"
+
+MODULE_AUTHOR("Bastien Nocera <hadess@hadess.net>");
+MODULE_DESCRIPTION("PS3 uDraw tablet driver");
+MODULE_LICENSE("GPL");
+
+/*
+ * Protocol information from:
+ * http://brandonw.net/udraw/
+ * and the source code of:
+ * https://vvvv.org/contribution/udraw-hid
+ */
+
+/*
+ * The device is setup with multiple input devices:
+ * - the touch area which works as a touchpad
+ * - the tablet area which works as a touchpad/drawing tablet
+ * - a joypad with a d-pad, and 7 buttons
+ * - an accelerometer device
+ */
+
+enum {
+ TOUCH_NONE,
+ TOUCH_PEN,
+ TOUCH_FINGER,
+ TOUCH_TWOFINGER
+};
+
+enum {
+ AXIS_X,
+ AXIS_Y,
+ AXIS_Z
+};
+
+/*
+ * Accelerometer min/max values
+ * in order, X, Y and Z
+ */
+struct {
+ int min;
+ int max;
+} accel_limits[] = {
+ [AXIS_X] = { 490, 534 },
+ [AXIS_Y] = { 490, 534 },
+ [AXIS_Z] = { 492, 536 }
+};
+
+#define DEVICE_NAME "THQ uDraw Game Tablet for PS3"
+/* resolution in pixels */
+#define RES_X 1920
+#define RES_Y 1080
+/* size in mm */
+#define WIDTH 160
+#define HEIGHT 90
+#define PRESSURE_OFFSET 113
+#define MAX_PRESSURE (255 - PRESSURE_OFFSET)
+
+struct udraw {
+ struct input_dev *joy_input_dev;
+ struct input_dev *touch_input_dev;
+ struct input_dev *pen_input_dev;
+ struct input_dev *accel_input_dev;
+ struct hid_device *hdev;
+
+ /*
+ * The device's two-finger support is pretty unreliable, as
+ * the device could report a single touch when the two fingers
+ * are too close together, and the distance between fingers, even
+ * though reported is not in the same unit as the touches.
+ *
+ * We'll make do without it, and try to report the first touch
+ * as reliably as possible.
+ */
+ int last_one_finger_x;
+ int last_one_finger_y;
+ int last_two_finger_x;
+ int last_two_finger_y;
+};
+
+static int clamp_accel(int axis, int offset)
+{
+ axis = clamp(axis,
+ accel_limits[offset].min,
+ accel_limits[offset].max);
+ axis = (axis - accel_limits[offset].min) /
+ ((accel_limits[offset].max -
+ accel_limits[offset].min) * 0xFF);
+ return axis;
+}
+
+static int udraw_raw_event(struct hid_device *hdev, struct hid_report *report,
+ u8 *data, int len)
+{
+ struct udraw *udraw = hid_get_drvdata(hdev);
+ int touch;
+ int x, y, z;
+
+ if (len != 27)
+ return 0;
+
+ if (data[11] == 0x00)
+ touch = TOUCH_NONE;
+ else if (data[11] == 0x40)
+ touch = TOUCH_PEN;
+ else if (data[11] == 0x80)
+ touch = TOUCH_FINGER;
+ else
+ touch = TOUCH_TWOFINGER;
+
+ /* joypad */
+ input_report_key(udraw->joy_input_dev, BTN_WEST, data[0] & 1);
+ input_report_key(udraw->joy_input_dev, BTN_SOUTH, !!(data[0] & 2));
+ input_report_key(udraw->joy_input_dev, BTN_EAST, !!(data[0] & 4));
+ input_report_key(udraw->joy_input_dev, BTN_NORTH, !!(data[0] & 8));
+
+ input_report_key(udraw->joy_input_dev, BTN_SELECT, !!(data[1] & 1));
+ input_report_key(udraw->joy_input_dev, BTN_START, !!(data[1] & 2));
+ input_report_key(udraw->joy_input_dev, BTN_MODE, !!(data[1] & 16));
+
+ x = y = 0;
+ switch (data[2]) {
+ case 0x0:
+ y = -127;
+ break;
+ case 0x1:
+ y = -127;
+ x = 127;
+ break;
+ case 0x2:
+ x = 127;
+ break;
+ case 0x3:
+ y = 127;
+ x = 127;
+ break;
+ case 0x4:
+ y = 127;
+ break;
+ case 0x5:
+ y = 127;
+ x = -127;
+ break;
+ case 0x6:
+ x = -127;
+ break;
+ case 0x7:
+ y = -127;
+ x = -127;
+ break;
+ default:
+ break;
+ }
+
+ input_report_abs(udraw->joy_input_dev, ABS_X, x);
+ input_report_abs(udraw->joy_input_dev, ABS_Y, y);
+
+ input_sync(udraw->joy_input_dev);
+
+ /* For pen and touchpad */
+ x = y = 0;
+ if (touch != TOUCH_NONE) {
+ if (data[15] != 0x0F)
+ x = data[15] * 256 + data[17];
+ if (data[16] != 0x0F)
+ y = data[16] * 256 + data[18];
+ }
+
+ if (touch == TOUCH_FINGER) {
+ /* Save the last one-finger touch */
+ udraw->last_one_finger_x = x;
+ udraw->last_one_finger_y = y;
+ udraw->last_two_finger_x = -1;
+ udraw->last_two_finger_y = -1;
+ } else if (touch == TOUCH_TWOFINGER) {
+ /*
+ * We have a problem because x/y is the one for the
+ * second finger but we want the first finger given
+ * to user-space otherwise it'll look as if it jumped.
+ *
+ * See the udraw struct definition for why this was
+ * implemented this way.
+ */
+ if (udraw->last_two_finger_x == -1) {
+ /* Save the position of the 2nd finger */
+ udraw->last_two_finger_x = x;
+ udraw->last_two_finger_y = y;
+
+ x = udraw->last_one_finger_x;
+ y = udraw->last_one_finger_y;
+ } else {
+ /*
+ * Offset the 2-finger coords using the
+ * saved data from the first finger
+ */
+ x = x - (udraw->last_two_finger_x
+ - udraw->last_one_finger_x);
+ y = y - (udraw->last_two_finger_y
+ - udraw->last_one_finger_y);
+ }
+ }
+
+ /* touchpad */
+ if (touch == TOUCH_FINGER || touch == TOUCH_TWOFINGER) {
+ input_report_key(udraw->touch_input_dev, BTN_TOUCH, 1);
+ input_report_key(udraw->touch_input_dev, BTN_TOOL_FINGER,
+ touch == TOUCH_FINGER);
+ input_report_key(udraw->touch_input_dev, BTN_TOOL_DOUBLETAP,
+ touch == TOUCH_TWOFINGER);
+
+ input_report_abs(udraw->touch_input_dev, ABS_X, x);
+ input_report_abs(udraw->touch_input_dev, ABS_Y, y);
+ } else {
+ input_report_key(udraw->touch_input_dev, BTN_TOUCH, 0);
+ input_report_key(udraw->touch_input_dev, BTN_TOOL_FINGER, 0);
+ input_report_key(udraw->touch_input_dev, BTN_TOOL_DOUBLETAP, 0);
+ }
+ input_sync(udraw->touch_input_dev);
+
+ /* pen */
+ if (touch == TOUCH_PEN) {
+ int level;
+
+ level = clamp(data[13] - PRESSURE_OFFSET,
+ 0, MAX_PRESSURE);
+
+ input_report_key(udraw->pen_input_dev, BTN_TOUCH, (level != 0));
+ input_report_key(udraw->pen_input_dev, BTN_TOOL_PEN, 1);
+ input_report_abs(udraw->pen_input_dev, ABS_PRESSURE, level);
+ input_report_abs(udraw->pen_input_dev, ABS_X, x);
+ input_report_abs(udraw->pen_input_dev, ABS_Y, y);
+ } else {
+ input_report_key(udraw->pen_input_dev, BTN_TOUCH, 0);
+ input_report_key(udraw->pen_input_dev, BTN_TOOL_PEN, 0);
+ input_report_abs(udraw->pen_input_dev, ABS_PRESSURE, 0);
+ }
+ input_sync(udraw->pen_input_dev);
+
+ /* accel */
+ x = (data[19] + (data[20] << 8));
+ x = clamp_accel(x, AXIS_X);
+ y = (data[21] + (data[22] << 8));
+ y = clamp_accel(y, AXIS_Y);
+ z = (data[23] + (data[24] << 8));
+ z = clamp_accel(z, AXIS_Z);
+ input_report_abs(udraw->accel_input_dev, ABS_X, x);
+ input_report_abs(udraw->accel_input_dev, ABS_Y, y);
+ input_report_abs(udraw->accel_input_dev, ABS_Z, z);
+ input_sync(udraw->accel_input_dev);
+
+ /* let hidraw and hiddev handle the report */
+ return 0;
+}
+
+static int udraw_open(struct input_dev *dev)
+{
+ struct udraw *udraw = input_get_drvdata(dev);
+
+ return hid_hw_open(udraw->hdev);
+}
+
+static void udraw_close(struct input_dev *dev)
+{
+ struct udraw *udraw = input_get_drvdata(dev);
+
+ hid_hw_close(udraw->hdev);
+}
+
+static struct input_dev *allocate_and_setup(struct hid_device *hdev,
+ const char *name)
+{
+ struct input_dev *input_dev;
+
+ input_dev = devm_input_allocate_device(&hdev->dev);
+ if (!input_dev)
+ return NULL;
+
+ input_dev->name = name;
+ input_dev->phys = hdev->phys;
+ input_dev->dev.parent = &hdev->dev;
+ input_dev->open = udraw_open;
+ input_dev->close = udraw_close;
+ input_dev->uniq = hdev->uniq;
+ input_dev->id.bustype = hdev->bus;
+ input_dev->id.vendor = hdev->vendor;
+ input_dev->id.product = hdev->product;
+ input_dev->id.version = hdev->version;
+ input_set_drvdata(input_dev, hid_get_drvdata(hdev));
+
+ return input_dev;
+}
+
+static bool udraw_setup_touch(struct udraw *udraw,
+ struct hid_device *hdev)
+{
+ struct input_dev *input_dev;
+
+ input_dev = allocate_and_setup(hdev, DEVICE_NAME " Touchpad");
+ if (!input_dev)
+ return false;
+
+ input_dev->evbit[0] = BIT(EV_ABS) | BIT(EV_KEY);
+
+ input_set_abs_params(input_dev, ABS_X, 0, RES_X, 1, 0);
+ input_abs_set_res(input_dev, ABS_X, RES_X / WIDTH);
+ input_set_abs_params(input_dev, ABS_Y, 0, RES_Y, 1, 0);
+ input_abs_set_res(input_dev, ABS_Y, RES_Y / HEIGHT);
+
+ set_bit(BTN_TOUCH, input_dev->keybit);
+ set_bit(BTN_TOOL_FINGER, input_dev->keybit);
+ set_bit(BTN_TOOL_DOUBLETAP, input_dev->keybit);
+
+ set_bit(INPUT_PROP_POINTER, input_dev->propbit);
+
+ udraw->touch_input_dev = input_dev;
+
+ return true;
+}
+
+static bool udraw_setup_pen(struct udraw *udraw,
+ struct hid_device *hdev)
+{
+ struct input_dev *input_dev;
+
+ input_dev = allocate_and_setup(hdev, DEVICE_NAME " Pen");
+ if (!input_dev)
+ return false;
+
+ input_dev->evbit[0] = BIT(EV_ABS) | BIT(EV_KEY);
+
+ input_set_abs_params(input_dev, ABS_X, 0, RES_X, 1, 0);
+ input_abs_set_res(input_dev, ABS_X, RES_X / WIDTH);
+ input_set_abs_params(input_dev, ABS_Y, 0, RES_Y, 1, 0);
+ input_abs_set_res(input_dev, ABS_Y, RES_Y / HEIGHT);
+ input_set_abs_params(input_dev, ABS_PRESSURE,
+ 0, MAX_PRESSURE, 0, 0);
+
+ set_bit(BTN_TOUCH, input_dev->keybit);
+ set_bit(BTN_TOOL_PEN, input_dev->keybit);
+
+ set_bit(INPUT_PROP_POINTER, input_dev->propbit);
+
+ udraw->pen_input_dev = input_dev;
+
+ return true;
+}
+
+static bool udraw_setup_accel(struct udraw *udraw,
+ struct hid_device *hdev)
+{
+ struct input_dev *input_dev;
+
+ input_dev = allocate_and_setup(hdev, DEVICE_NAME " Accelerometer");
+ if (!input_dev)
+ return false;
+
+ input_dev->evbit[0] = BIT(EV_ABS);
+
+ /* 1G accel is reported as ~256, so clamp to 2G */
+ input_set_abs_params(input_dev, ABS_X, -512, 512, 0, 0);
+ input_set_abs_params(input_dev, ABS_Y, -512, 512, 0, 0);
+ input_set_abs_params(input_dev, ABS_Z, -512, 512, 0, 0);
+
+ set_bit(INPUT_PROP_ACCELEROMETER, input_dev->propbit);
+
+ udraw->accel_input_dev = input_dev;
+
+ return true;
+}
+
+static bool udraw_setup_joypad(struct udraw *udraw,
+ struct hid_device *hdev)
+{
+ struct input_dev *input_dev;
+
+ input_dev = allocate_and_setup(hdev, DEVICE_NAME " Joypad");
+ if (!input_dev)
+ return false;
+
+ input_dev->evbit[0] = BIT(EV_KEY) | BIT(EV_ABS);
+
+ set_bit(BTN_SOUTH, input_dev->keybit);
+ set_bit(BTN_NORTH, input_dev->keybit);
+ set_bit(BTN_EAST, input_dev->keybit);
+ set_bit(BTN_WEST, input_dev->keybit);
+ set_bit(BTN_SELECT, input_dev->keybit);
+ set_bit(BTN_START, input_dev->keybit);
+ set_bit(BTN_MODE, input_dev->keybit);
+
+ input_set_abs_params(input_dev, ABS_X, -127, 127, 0, 0);
+ input_set_abs_params(input_dev, ABS_Y, -127, 127, 0, 0);
+
+ udraw->joy_input_dev = input_dev;
+
+ return true;
+}
+
+static int udraw_probe(struct hid_device *hdev, const struct hid_device_id *id)
+{
+ struct udraw *udraw;
+ int ret;
+
+ udraw = devm_kzalloc(&hdev->dev, sizeof(struct udraw), GFP_KERNEL);
+ if (!udraw)
+ return -ENOMEM;
+
+ udraw->hdev = hdev;
+ udraw->last_two_finger_x = -1;
+ udraw->last_two_finger_y = -1;
+
+ hid_set_drvdata(hdev, udraw);
+
+ ret = hid_parse(hdev);
+ if (ret) {
+ hid_err(hdev, "parse failed\n");
+ return ret;
+ }
+
+ if (!udraw_setup_joypad(udraw, hdev) ||
+ !udraw_setup_touch(udraw, hdev) ||
+ !udraw_setup_pen(udraw, hdev) ||
+ !udraw_setup_accel(udraw, hdev)) {
+ hid_err(hdev, "could not allocate interfaces\n");
+ return -ENOMEM;
+ }
+
+ ret = input_register_device(udraw->joy_input_dev) ||
+ input_register_device(udraw->touch_input_dev) ||
+ input_register_device(udraw->pen_input_dev) ||
+ input_register_device(udraw->accel_input_dev);
+ if (ret) {
+ hid_err(hdev, "failed to register interfaces\n");
+ return ret;
+ }
+
+ ret = hid_hw_start(hdev, HID_CONNECT_HIDRAW | HID_CONNECT_DRIVER);
+ if (ret) {
+ hid_err(hdev, "hw start failed\n");
+ return ret;
+ }
+
+ return 0;
+}
+
+static const struct hid_device_id udraw_devices[] = {
+ { HID_USB_DEVICE(USB_VENDOR_ID_THQ, USB_DEVICE_ID_THQ_PS3_UDRAW) },
+ { }
+};
+MODULE_DEVICE_TABLE(hid, udraw_devices);
+
+static struct hid_driver udraw_driver = {
+ .name = "hid-udraw",
+ .id_table = udraw_devices,
+ .raw_event = udraw_raw_event,
+ .probe = udraw_probe,
+};
+module_hid_driver(udraw_driver);
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