drivers/input/tablet/hanwang.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  *  USB Hanwang tablet support
   4  *
   5  *  Copyright (c) 2010 Xing Wei <weixing@hanwang.com.cn>
   6  */
   7
   8 /*
   9  */
  10
  11 #include <linux/types.h>
  12 #include <linux/kernel.h>
  13 #include <linux/slab.h>
  14 #include <linux/module.h>
  15 #include <linux/usb/input.h>
  16
  17 MODULE_AUTHOR("Xing Wei <weixing@hanwang.com.cn>");
  18 MODULE_DESCRIPTION("USB Hanwang tablet driver");
  19 MODULE_LICENSE("GPL");
  20
  21 #define USB_VENDOR_ID_HANWANG           0x0b57
  22 #define HANWANG_TABLET_INT_CLASS        0x0003
  23 #define HANWANG_TABLET_INT_SUB_CLASS    0x0001
  24 #define HANWANG_TABLET_INT_PROTOCOL     0x0002
  25
  26 #define ART_MASTER_PKGLEN_MAX   10
  27
  28 /* device IDs */
  29 #define STYLUS_DEVICE_ID        0x02
  30 #define TOUCH_DEVICE_ID         0x03
  31 #define CURSOR_DEVICE_ID        0x06
  32 #define ERASER_DEVICE_ID        0x0A
  33 #define PAD_DEVICE_ID           0x0F
  34
  35 /* match vendor and interface info  */
  36 #define HANWANG_TABLET_DEVICE(vend, cl, sc, pr) \
  37         .match_flags = USB_DEVICE_ID_MATCH_VENDOR \
  38                 | USB_DEVICE_ID_MATCH_INT_INFO, \
  39         .idVendor = (vend), \
  40         .bInterfaceClass = (cl), \
  41         .bInterfaceSubClass = (sc), \
  42         .bInterfaceProtocol = (pr)
  43
  44 enum hanwang_tablet_type {
  45         HANWANG_ART_MASTER_III,
  46         HANWANG_ART_MASTER_HD,
  47         HANWANG_ART_MASTER_II,
  48 };
  49
  50 struct hanwang {
  51         unsigned char *data;
  52         dma_addr_t data_dma;
  53         struct input_dev *dev;
  54         struct usb_device *usbdev;
  55         struct urb *irq;
  56         const struct hanwang_features *features;
  57         unsigned int current_tool;
  58         unsigned int current_id;
  59         char name[64];
  60         char phys[32];
  61 };
  62
  63 struct hanwang_features {
  64         unsigned short pid;
  65         char *name;
  66         enum hanwang_tablet_type type;
  67         int pkg_len;
  68         int max_x;
  69         int max_y;
  70         int max_tilt_x;
  71         int max_tilt_y;
  72         int max_pressure;
  73 };
  74
  75 static const struct hanwang_features features_array[] = {
  76         { 0x8528, "Hanwang Art Master III 0906", HANWANG_ART_MASTER_III,
  77           ART_MASTER_PKGLEN_MAX, 0x5757, 0x3692, 0x3f, 0x7f, 2048 },
  78         { 0x8529, "Hanwang Art Master III 0604", HANWANG_ART_MASTER_III,
  79           ART_MASTER_PKGLEN_MAX, 0x3d84, 0x2672, 0x3f, 0x7f, 2048 },
  80         { 0x852a, "Hanwang Art Master III 1308", HANWANG_ART_MASTER_III,
  81           ART_MASTER_PKGLEN_MAX, 0x7f00, 0x4f60, 0x3f, 0x7f, 2048 },
  82         { 0x8401, "Hanwang Art Master HD 5012", HANWANG_ART_MASTER_HD,
  83           ART_MASTER_PKGLEN_MAX, 0x678e, 0x4150, 0x3f, 0x7f, 1024 },
  84         { 0x8503, "Hanwang Art Master II", HANWANG_ART_MASTER_II,
  85           ART_MASTER_PKGLEN_MAX, 0x27de, 0x1cfe, 0x3f, 0x7f, 1024 },
  86 };
  87
  88 static const int hw_eventtypes[] = {
  89         EV_KEY, EV_ABS, EV_MSC,
  90 };
  91
  92 static const int hw_absevents[] = {
  93         ABS_X, ABS_Y, ABS_TILT_X, ABS_TILT_Y, ABS_WHEEL,
  94         ABS_RX, ABS_RY, ABS_PRESSURE, ABS_MISC,
  95 };
  96
  97 static const int hw_btnevents[] = {
  98         BTN_STYLUS, BTN_STYLUS2, BTN_TOOL_PEN, BTN_TOOL_RUBBER,
  99         BTN_TOOL_MOUSE, BTN_TOOL_FINGER,
 100         BTN_0, BTN_1, BTN_2, BTN_3, BTN_4, BTN_5, BTN_6, BTN_7, BTN_8,
 101 };
 102
 103 static const int hw_mscevents[] = {
 104         MSC_SERIAL,
 105 };
 106
 107 static void hanwang_parse_packet(struct hanwang *hanwang)
 108 {
 109         unsigned char *data = hanwang->data;
 110         struct input_dev *input_dev = hanwang->dev;
 111         struct usb_device *dev = hanwang->usbdev;
 112         enum hanwang_tablet_type type = hanwang->features->type;
 113         int i;
 114         u16 p;
 115
 116         if (type == HANWANG_ART_MASTER_II) {
 117                 hanwang->current_tool = BTN_TOOL_PEN;
 118                 hanwang->current_id = STYLUS_DEVICE_ID;
 119         }
 120
 121         switch (data[0]) {
 122         case 0x02:      /* data packet */
 123                 switch (data[1]) {
 124                 case 0x80:      /* tool prox out */
 125                         if (type != HANWANG_ART_MASTER_II) {
 126                                 hanwang->current_id = 0;
 127                                 input_report_key(input_dev,
 128                                                  hanwang->current_tool, 0);
 129                         }
 130                         break;
 131
 132                 case 0x00:      /* artmaster ii pen leave */
 133                         if (type == HANWANG_ART_MASTER_II) {
 134                                 hanwang->current_id = 0;
 135                                 input_report_key(input_dev,
 136                                                  hanwang->current_tool, 0);
 137                         }
 138                         break;
 139
 140                 case 0xc2:      /* first time tool prox in */
 141                         switch (data[3] & 0xf0) {
 142                         case 0x20:      /* art_master III */
 143                         case 0x30:      /* art_master_HD */
 144                                 hanwang->current_id = STYLUS_DEVICE_ID;
 145                                 hanwang->current_tool = BTN_TOOL_PEN;
 146                                 input_report_key(input_dev, BTN_TOOL_PEN, 1);
 147                                 break;
 148                         case 0xa0:      /* art_master III */
 149                         case 0xb0:      /* art_master_HD */
 150                                 hanwang->current_id = ERASER_DEVICE_ID;
 151                                 hanwang->current_tool = BTN_TOOL_RUBBER;
 152                                 input_report_key(input_dev, BTN_TOOL_RUBBER, 1);
 153                                 break;
 154                         default:
 155                                 hanwang->current_id = 0;
 156                                 dev_dbg(&dev->dev,
 157                                         "unknown tablet tool %02x\n", data[0]);
 158                                 break;
 159                         }
 160                         break;
 161
 162                 default:        /* tool data packet */
 163                         switch (type) {
 164                         case HANWANG_ART_MASTER_III:
 165                                 p = (data[6] << 3) |
 166                                     ((data[7] & 0xc0) >> 5) |
 167                                     (data[1] & 0x01);
 168                                 break;
 169
 170                         case HANWANG_ART_MASTER_HD:
 171                         case HANWANG_ART_MASTER_II:
 172                                 p = (data[7] >> 6) | (data[6] << 2);
 173                                 break;
 174
 175                         default:
 176                                 p = 0;
 177                                 break;
 178                         }
 179
 180                         input_report_abs(input_dev, ABS_X,
 181                                          be16_to_cpup((__be16 *)&data[2]));
 182                         input_report_abs(input_dev, ABS_Y,
 183                                          be16_to_cpup((__be16 *)&data[4]));
 184                         input_report_abs(input_dev, ABS_PRESSURE, p);
 185                         input_report_abs(input_dev, ABS_TILT_X, data[7] & 0x3f);
 186                         input_report_abs(input_dev, ABS_TILT_Y, data[8] & 0x7f);
 187                         input_report_key(input_dev, BTN_STYLUS, data[1] & 0x02);
 188
 189                         if (type != HANWANG_ART_MASTER_II)
 190                                 input_report_key(input_dev, BTN_STYLUS2,
 191                                                  data[1] & 0x04);
 192                         else
 193                                 input_report_key(input_dev, BTN_TOOL_PEN, 1);
 194
 195                         break;
 196                 }
 197
 198                 input_report_abs(input_dev, ABS_MISC, hanwang->current_id);
 199                 input_event(input_dev, EV_MSC, MSC_SERIAL,
 200                                 hanwang->features->pid);
 201                 break;
 202
 203         case 0x0c:
 204                 /* roll wheel */
 205                 hanwang->current_id = PAD_DEVICE_ID;
 206
 207                 switch (type) {
 208                 case HANWANG_ART_MASTER_III:
 209                         input_report_key(input_dev, BTN_TOOL_FINGER,
 210                                          data[1] || data[2] || data[3]);
 211                         input_report_abs(input_dev, ABS_WHEEL, data[1]);
 212                         input_report_key(input_dev, BTN_0, data[2]);
 213                         for (i = 0; i < 8; i++)
 214                                 input_report_key(input_dev,
 215                                          BTN_1 + i, data[3] & (1 << i));
 216                         break;
 217
 218                 case HANWANG_ART_MASTER_HD:
 219                         input_report_key(input_dev, BTN_TOOL_FINGER, data[1] ||
 220                                         data[2] || data[3] || data[4] ||
 221                                         data[5] || data[6]);
 222                         input_report_abs(input_dev, ABS_RX,
 223                                         ((data[1] & 0x1f) << 8) | data[2]);
 224                         input_report_abs(input_dev, ABS_RY,
 225                                         ((data[3] & 0x1f) << 8) | data[4]);
 226                         input_report_key(input_dev, BTN_0, data[5] & 0x01);
 227                         for (i = 0; i < 4; i++) {
 228                                 input_report_key(input_dev,
 229                                          BTN_1 + i, data[5] & (1 << i));
 230                                 input_report_key(input_dev,
 231                                          BTN_5 + i, data[6] & (1 << i));
 232                         }
 233                         break;
 234
 235                 case HANWANG_ART_MASTER_II:
 236                         dev_dbg(&dev->dev, "error packet  %02x\n", data[0]);
 237                         return;
 238                 }
 239
 240                 input_report_abs(input_dev, ABS_MISC, hanwang->current_id);
 241                 input_event(input_dev, EV_MSC, MSC_SERIAL, 0xffffffff);
 242                 break;
 243
 244         default:
 245                 dev_dbg(&dev->dev, "error packet  %02x\n", data[0]);
 246                 break;
 247         }
 248
 249         input_sync(input_dev);
 250 }
 251
 252 static void hanwang_irq(struct urb *urb)
 253 {
 254         struct hanwang *hanwang = urb->context;
 255         struct usb_device *dev = hanwang->usbdev;
 256         int retval;
 257
 258         switch (urb->status) {
 259         case 0:
 260                 /* success */;
 261                 hanwang_parse_packet(hanwang);
 262                 break;
 263         case -ECONNRESET:
 264         case -ENOENT:
 265         case -ESHUTDOWN:
 266                 /* this urb is terminated, clean up */
 267                 dev_err(&dev->dev, "%s - urb shutting down with status: %d",
 268                         __func__, urb->status);
 269                 return;
 270         default:
 271                 dev_err(&dev->dev, "%s - nonzero urb status received: %d",
 272                         __func__, urb->status);
 273                 break;
 274         }
 275
 276         retval = usb_submit_urb(urb, GFP_ATOMIC);
 277         if (retval)
 278                 dev_err(&dev->dev, "%s - usb_submit_urb failed with result %d",
 279                         __func__, retval);
 280 }
 281
 282 static int hanwang_open(struct input_dev *dev)
 283 {
 284         struct hanwang *hanwang = input_get_drvdata(dev);
 285
 286         hanwang->irq->dev = hanwang->usbdev;
 287         if (usb_submit_urb(hanwang->irq, GFP_KERNEL))
 288                 return -EIO;
 289
 290         return 0;
 291 }
 292
 293 static void hanwang_close(struct input_dev *dev)
 294 {
 295         struct hanwang *hanwang = input_get_drvdata(dev);
 296
 297         usb_kill_urb(hanwang->irq);
 298 }
 299
 300 static bool get_features(struct usb_device *dev, struct hanwang *hanwang)
 301 {
 302         int i;
 303
 304         for (i = 0; i < ARRAY_SIZE(features_array); i++) {
 305                 if (le16_to_cpu(dev->descriptor.idProduct) ==
 306                                 features_array[i].pid) {
 307                         hanwang->features = &features_array[i];
 308                         return true;
 309                 }
 310         }
 311
 312         return false;
 313 }
 314
 315
 316 static int hanwang_probe(struct usb_interface *intf, const struct usb_device_id *id)
 317 {
 318         struct usb_device *dev = interface_to_usbdev(intf);
 319         struct usb_endpoint_descriptor *endpoint;
 320         struct hanwang *hanwang;
 321         struct input_dev *input_dev;
 322         int error;
 323         int i;
 324
 325         if (intf->cur_altsetting->desc.bNumEndpoints < 1)
 326                 return -ENODEV;
 327
 328         hanwang = kzalloc(sizeof(struct hanwang), GFP_KERNEL);
 329         input_dev = input_allocate_device();
 330         if (!hanwang || !input_dev) {
 331                 error = -ENOMEM;
 332                 goto fail1;
 333         }
 334
 335         if (!get_features(dev, hanwang)) {
 336                 error = -ENXIO;
 337                 goto fail1;
 338         }
 339
 340         hanwang->data = usb_alloc_coherent(dev, hanwang->features->pkg_len,
 341                                         GFP_KERNEL, &hanwang->data_dma);
 342         if (!hanwang->data) {
 343                 error = -ENOMEM;
 344                 goto fail1;
 345         }
 346
 347         hanwang->irq = usb_alloc_urb(0, GFP_KERNEL);
 348         if (!hanwang->irq) {
 349                 error = -ENOMEM;
 350                 goto fail2;
 351         }
 352
 353         hanwang->usbdev = dev;
 354         hanwang->dev = input_dev;
 355
 356         usb_make_path(dev, hanwang->phys, sizeof(hanwang->phys));
 357         strlcat(hanwang->phys, "/input0", sizeof(hanwang->phys));
 358
 359         strlcpy(hanwang->name, hanwang->features->name, sizeof(hanwang->name));
 360         input_dev->name = hanwang->name;
 361         input_dev->phys = hanwang->phys;
 362         usb_to_input_id(dev, &input_dev->id);
 363         input_dev->dev.parent = &intf->dev;
 364
 365         input_set_drvdata(input_dev, hanwang);
 366
 367         input_dev->open = hanwang_open;
 368         input_dev->close = hanwang_close;
 369
 370         for (i = 0; i < ARRAY_SIZE(hw_eventtypes); ++i)
 371                 __set_bit(hw_eventtypes[i], input_dev->evbit);
 372
 373         for (i = 0; i < ARRAY_SIZE(hw_absevents); ++i)
 374                 __set_bit(hw_absevents[i], input_dev->absbit);
 375
 376         for (i = 0; i < ARRAY_SIZE(hw_btnevents); ++i)
 377                 __set_bit(hw_btnevents[i], input_dev->keybit);
 378
 379         for (i = 0; i < ARRAY_SIZE(hw_mscevents); ++i)
 380                 __set_bit(hw_mscevents[i], input_dev->mscbit);
 381
 382         input_set_abs_params(input_dev, ABS_X,
 383                              0, hanwang->features->max_x, 4, 0);
 384         input_set_abs_params(input_dev, ABS_Y,
 385                              0, hanwang->features->max_y, 4, 0);
 386         input_set_abs_params(input_dev, ABS_TILT_X,
 387                              0, hanwang->features->max_tilt_x, 0, 0);
 388         input_set_abs_params(input_dev, ABS_TILT_Y,
 389                              0, hanwang->features->max_tilt_y, 0, 0);
 390         input_set_abs_params(input_dev, ABS_PRESSURE,
 391                              0, hanwang->features->max_pressure, 0, 0);
 392
 393         endpoint = &intf->cur_altsetting->endpoint[0].desc;
 394         usb_fill_int_urb(hanwang->irq, dev,
 395                         usb_rcvintpipe(dev, endpoint->bEndpointAddress),
 396                         hanwang->data, hanwang->features->pkg_len,
 397                         hanwang_irq, hanwang, endpoint->bInterval);
 398         hanwang->irq->transfer_dma = hanwang->data_dma;
 399         hanwang->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
 400
 401         error = input_register_device(hanwang->dev);
 402         if (error)
 403                 goto fail3;
 404
 405         usb_set_intfdata(intf, hanwang);
 406
 407         return 0;
 408
 409  fail3: usb_free_urb(hanwang->irq);
 410  fail2: usb_free_coherent(dev, hanwang->features->pkg_len,
 411                         hanwang->data, hanwang->data_dma);
 412  fail1: input_free_device(input_dev);
 413         kfree(hanwang);
 414         return error;
 415
 416 }
 417
 418 static void hanwang_disconnect(struct usb_interface *intf)
 419 {
 420         struct hanwang *hanwang = usb_get_intfdata(intf);
 421
 422         input_unregister_device(hanwang->dev);
 423         usb_free_urb(hanwang->irq);
 424         usb_free_coherent(interface_to_usbdev(intf),
 425                         hanwang->features->pkg_len, hanwang->data,
 426                         hanwang->data_dma);
 427         kfree(hanwang);
 428         usb_set_intfdata(intf, NULL);
 429 }
 430
 431 static const struct usb_device_id hanwang_ids[] = {
 432         { HANWANG_TABLET_DEVICE(USB_VENDOR_ID_HANWANG, HANWANG_TABLET_INT_CLASS,
 433                 HANWANG_TABLET_INT_SUB_CLASS, HANWANG_TABLET_INT_PROTOCOL) },
 434         {}
 435 };
 436
 437 MODULE_DEVICE_TABLE(usb, hanwang_ids);
 438
 439 static struct usb_driver hanwang_driver = {
 440         .name           = "hanwang",
 441         .probe          = hanwang_probe,
 442         .disconnect     = hanwang_disconnect,
 443         .id_table       = hanwang_ids,
 444 };
 445
 446 module_usb_driver(hanwang_driver);