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