// SPDX-License-Identifier: GPL-2.0-only /* * HID driver for THQ PS3 uDraw tablet * * Copyright ( C ) 2016 Red Hat Inc . All Rights Reserved #include <linux/device.h>#include <linux/hid.h>#include <linux/module.h>#include "hid-ids.h" "Bastien Nocera <hadess@hadess.net>" );"PS3 uDraw tablet driver" );"GPL" );/* * Protocol information from : * https : //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 {enum {/* * Accelerometer min / max values * in order , X , Y and Z static struct {int min;int max;490 , 534 },490 , 534 },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)0 xFF);return axis;static int udraw_raw_event(struct hid_device *hdev, struct hid_report *report,int len)struct udraw *udraw = hid_get_drvdata(hdev);int touch;int x, y, z;if (len != 27 )return 0 ;if (data[11 ] == 0 x00)else if (data[11 ] == 0 x40)else if (data[11 ] == 0 x80)else /* joypad */ 0 ] & 1 );0 ] & 2 ));0 ] & 4 ));0 ] & 8 ));1 ] & 1 ));1 ] & 2 ));1 ] & 16 ));0 ;switch (data[2 ]) {case 0 x0:127 ;break ;case 0 x1:127 ;127 ;break ;case 0 x2:127 ;break ;case 0 x3:127 ;127 ;break ;case 0 x4:127 ;break ;case 0 x5:127 ;127 ;break ;case 0 x6:127 ;break ;case 0 x7:127 ;127 ;break ;default :break ;/* For pen and touchpad */ 0 ;if (touch != TOUCH_NONE) {if (data[15 ] != 0 x0F)15 ] * 256 + data[17 ];if (data[16 ] != 0 x0F)16 ] * 256 + data[18 ];if (touch == TOUCH_FINGER) {/* Save the last one-finger touch */ 1 ;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 */ else {/* * Offset the 2 - finger coords using the * saved data from the first finger /* touchpad */ if (touch == TOUCH_FINGER || touch == TOUCH_TWOFINGER) {1 );else {0 );0 );0 );/* pen */ if (touch == TOUCH_PEN) {int level;13 ] - PRESSURE_OFFSET,0 , MAX_PRESSURE);0 ));1 );else {0 );0 );0 );/* accel */ 19 ] + (data[20 ] << 8 ));21 ] + (data[22 ] << 8 ));23 ] + (data[24 ] << 8 ));/* 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);static struct input_dev *allocate_and_setup(struct hid_device *hdev,const char *name)struct input_dev *input_dev;if (!input_dev)return NULL;return input_dev;static bool udraw_setup_touch(struct udraw *udraw,struct hid_device *hdev)struct input_dev *input_dev;" Touchpad" );if (!input_dev)return false ;0 ] = BIT(EV_ABS) | BIT(EV_KEY);0 , RES_X, 1 , 0 );0 , RES_Y, 1 , 0 );return true ;static bool udraw_setup_pen(struct udraw *udraw,struct hid_device *hdev)struct input_dev *input_dev;" Pen" );if (!input_dev)return false ;0 ] = BIT(EV_ABS) | BIT(EV_KEY);0 , RES_X, 1 , 0 );0 , RES_Y, 1 , 0 );0 , MAX_PRESSURE, 0 , 0 );return true ;static bool udraw_setup_accel(struct udraw *udraw,struct hid_device *hdev)struct input_dev *input_dev;" Accelerometer" );if (!input_dev)return false ;0 ] = BIT(EV_ABS);/* 1G accel is reported as ~256, so clamp to 2G */ 512 , 512 , 0 , 0 );512 , 512 , 0 , 0 );512 , 512 , 0 , 0 );return true ;static bool udraw_setup_joypad(struct udraw *udraw,struct hid_device *hdev)struct input_dev *input_dev;" Joypad" );if (!input_dev)return false ;0 ] = BIT(EV_KEY) | BIT(EV_ABS);127 , 127 , 0 , 0 );127 , 127 , 0 , 0 );return true ;static int udraw_probe(struct hid_device *hdev, const struct hid_device_id *id)struct udraw *udraw;int ret;sizeof (struct udraw), GFP_KERNEL);if (!udraw)return -ENOMEM;1 ;1 ;if (ret) {"parse failed\n" );return ret;if (!udraw_setup_joypad(udraw, hdev) ||"could not allocate interfaces\n" );return -ENOMEM;if (ret) {"failed to register interfaces\n" );return ret;if (ret) {"hw start failed\n" );return ret;return 0 ;static const struct hid_device_id udraw_devices[] = {static struct hid_driver udraw_driver = {"hid-udraw" ,
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