drivers/input/tablet/hanwang.c

   1 /*
   2  *  USB Hanwang tablet support
   3  *
   4  *  Copyright (c) 2010 Xing Wei <weixing@hanwang.com.cn>
   5  *
   6  */
   7
   8 /*
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 2 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program; if not, write to the Free Software
  21  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  22  *
  23  */
  24
  25 #include <linux/types.h>
  26 #include <linux/kernel.h>
  27 #include <linux/slab.h>
  28 #include <linux/module.h>
  29 #include <linux/init.h>
  30 #include <linux/usb/input.h>
  31
  32 #define DRIVER_AUTHOR   "Xing Wei <weixing@hanwang.com.cn>"
  33 #define DRIVER_DESC     "USB Hanwang tablet driver"
  34 #define DRIVER_LICENSE  "GPL"
  35
  36 MODULE_AUTHOR(DRIVER_AUTHOR);
  37 MODULE_DESCRIPTION(DRIVER_DESC);
  38 MODULE_LICENSE(DRIVER_LICENSE);
  39
  40 #define USB_VENDOR_ID_HANWANG           0x0b57
  41 #define HANWANG_TABLET_INT_CLASS        0x0003
  42 #define HANWANG_TABLET_INT_SUB_CLASS    0x0001
  43 #define HANWANG_TABLET_INT_PROTOCOL     0x0002
  44
  45 #define ART_MASTER_PKGLEN_MAX   10
  46
  47 /* device IDs */
  48 #define STYLUS_DEVICE_ID        0x02
  49 #define TOUCH_DEVICE_ID         0x03
  50 #define CURSOR_DEVICE_ID        0x06
  51 #define ERASER_DEVICE_ID        0x0A
  52 #define PAD_DEVICE_ID           0x0F
  53
  54 /* match vendor and interface info  */
  55 #define HANWANG_TABLET_DEVICE(vend, cl, sc, pr) \
  56         .match_flags = USB_DEVICE_ID_MATCH_VENDOR \
  57                 | USB_DEVICE_ID_MATCH_INT_INFO, \
  58         .idVendor = (vend), \
  59         .bInterfaceClass = (cl), \
  60         .bInterfaceSubClass = (sc), \
  61         .bInterfaceProtocol = (pr)
  62
  63 enum hanwang_tablet_type {
  64         HANWANG_ART_MASTER_III,
  65         HANWANG_ART_MASTER_HD,
  66 };
  67
  68 struct hanwang {
  69         unsigned char *data;
  70         dma_addr_t data_dma;
  71         struct input_dev *dev;
  72         struct usb_device *usbdev;
  73         struct urb *irq;
  74         const struct hanwang_features *features;
  75         unsigned int current_tool;
  76         unsigned int current_id;
  77         char name[64];
  78         char phys[32];
  79 };
  80
  81 struct hanwang_features {
  82         unsigned short pid;
  83         char *name;
  84         enum hanwang_tablet_type type;
  85         int pkg_len;
  86         int max_x;
  87         int max_y;
  88         int max_tilt_x;
  89         int max_tilt_y;
  90         int max_pressure;
  91 };
  92
  93 static const struct hanwang_features features_array[] = {
  94         { 0x8528, "Hanwang Art Master III 0906", HANWANG_ART_MASTER_III,
  95           ART_MASTER_PKGLEN_MAX, 0x5757, 0x3692, 0x3f, 0x7f, 2048 },
  96         { 0x8529, "Hanwang Art Master III 0604", HANWANG_ART_MASTER_III,
  97           ART_MASTER_PKGLEN_MAX, 0x3d84, 0x2672, 0x3f, 0x7f, 2048 },
  98         { 0x852a, "Hanwang Art Master III 1308", HANWANG_ART_MASTER_III,
  99           ART_MASTER_PKGLEN_MAX, 0x7f00, 0x4f60, 0x3f, 0x7f, 2048 },
 100         { 0x8401, "Hanwang Art Master HD 5012", HANWANG_ART_MASTER_HD,
 101           ART_MASTER_PKGLEN_MAX, 0x678e, 0x4150, 0x3f, 0x7f, 1024 },
 102 };
 103
 104 static const int hw_eventtypes[] = {
 105         EV_KEY, EV_ABS, EV_MSC,
 106 };
 107
 108 static const int hw_absevents[] = {
 109         ABS_X, ABS_Y, ABS_TILT_X, ABS_TILT_Y, ABS_WHEEL,
 110         ABS_RX, ABS_RY, ABS_PRESSURE, ABS_MISC,
 111 };
 112
 113 static const int hw_btnevents[] = {
 114         BTN_STYLUS, BTN_STYLUS2, BTN_TOOL_PEN, BTN_TOOL_RUBBER,
 115         BTN_TOOL_MOUSE, BTN_TOOL_FINGER,
 116         BTN_0, BTN_1, BTN_2, BTN_3, BTN_4, BTN_5, BTN_6, BTN_7, BTN_8,
 117 };
 118
 119 static const int hw_mscevents[] = {
 120         MSC_SERIAL,
 121 };
 122
 123 static void hanwang_parse_packet(struct hanwang *hanwang)
 124 {
 125         unsigned char *data = hanwang->data;
 126         struct input_dev *input_dev = hanwang->dev;
 127         struct usb_device *dev = hanwang->usbdev;
 128         enum hanwang_tablet_type type = hanwang->features->type;
 129         int i;
 130         u16 x, y, p;
 131
 132         switch (data[0]) {
 133         case 0x02:      /* data packet */
 134                 switch (data[1]) {
 135                 case 0x80:      /* tool prox out */
 136                         hanwang->current_id = 0;
 137                         input_report_key(input_dev, hanwang->current_tool, 0);
 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 ", data[0]);
 158                                 break;
 159                         }
 160                         break;
 161
 162                 default:        /* tool data packet */
 163                         x = (data[2] << 8) | data[3];
 164                         y = (data[4] << 8) | data[5];
 165
 166                         switch (type) {
 167                         case HANWANG_ART_MASTER_III:
 168                                 p = (data[6] << 3) |
 169                                     ((data[7] & 0xc0) >> 5) |
 170                                     (data[1] & 0x01);
 171                                 break;
 172
 173                         case HANWANG_ART_MASTER_HD:
 174                                 p = (data[7] >> 6) | (data[6] << 2);
 175                                 break;
 176
 177                         default:
 178                                 p = 0;
 179                                 break;
 180                         }
 181
 182                         input_report_abs(input_dev, ABS_X,
 183                                                 le16_to_cpup((__le16 *)&x));
 184                         input_report_abs(input_dev, ABS_Y,
 185                                                 le16_to_cpup((__le16 *)&y));
 186                         input_report_abs(input_dev, ABS_PRESSURE,
 187                                                 le16_to_cpup((__le16 *)&p));
 188                         input_report_abs(input_dev, ABS_TILT_X, data[7] & 0x3f);
 189                         input_report_abs(input_dev, ABS_TILT_Y, data[8] & 0x7f);
 190                         input_report_key(input_dev, BTN_STYLUS, data[1] & 0x02);
 191                         input_report_key(input_dev, BTN_STYLUS2, data[1] & 0x04);
 192                         break;
 193                 }
 194                 input_report_abs(input_dev, ABS_MISC, hanwang->current_id);
 195                 input_event(input_dev, EV_MSC, MSC_SERIAL,
 196                                 hanwang->features->pid);
 197                 break;
 198
 199         case 0x0c:
 200                 /* roll wheel */
 201                 hanwang->current_id = PAD_DEVICE_ID;
 202
 203                 switch (type) {
 204                 case HANWANG_ART_MASTER_III:
 205                         input_report_key(input_dev, BTN_TOOL_FINGER, data[1] ||
 206                                                         data[2] || data[3]);
 207                         input_report_abs(input_dev, ABS_WHEEL, data[1]);
 208                         input_report_key(input_dev, BTN_0, data[2]);
 209                         for (i = 0; i < 8; i++)
 210                                 input_report_key(input_dev,
 211                                          BTN_1 + i, data[3] & (1 << i));
 212                         break;
 213
 214                 case HANWANG_ART_MASTER_HD:
 215                         input_report_key(input_dev, BTN_TOOL_FINGER, data[1] ||
 216                                         data[2] || data[3] || data[4] ||
 217                                         data[5] || data[6]);
 218                         input_report_abs(input_dev, ABS_RX,
 219                                         ((data[1] & 0x1f) << 8) | data[2]);
 220                         input_report_abs(input_dev, ABS_RY,
 221                                         ((data[3] & 0x1f) << 8) | data[4]);
 222                         input_report_key(input_dev, BTN_0, data[5] & 0x01);
 223                         for (i = 0; i < 4; i++) {
 224                                 input_report_key(input_dev,
 225                                          BTN_1 + i, data[5] & (1 << i));
 226                                 input_report_key(input_dev,
 227                                          BTN_5 + i, data[6] & (1 << i));
 228                         }
 229                         break;
 230                 }
 231
 232                 input_report_abs(input_dev, ABS_MISC, hanwang->current_id);
 233                 input_event(input_dev, EV_MSC, MSC_SERIAL, 0xffffffff);
 234                 break;
 235
 236         default:
 237                 dev_dbg(&dev->dev, "error packet  %02x ", data[0]);
 238                 break;
 239         }
 240
 241         input_sync(input_dev);
 242 }
 243
 244 static void hanwang_irq(struct urb *urb)
 245 {
 246         struct hanwang *hanwang = urb->context;
 247         struct usb_device *dev = hanwang->usbdev;
 248         int retval;
 249
 250         switch (urb->status) {
 251         case 0:
 252                 /* success */;
 253                 hanwang_parse_packet(hanwang);
 254                 break;
 255         case -ECONNRESET:
 256         case -ENOENT:
 257         case -ESHUTDOWN:
 258                 /* this urb is terminated, clean up */
 259                 dev_err(&dev->dev, "%s - urb shutting down with status: %d",
 260                         __func__, urb->status);
 261                 return;
 262         default:
 263                 dev_err(&dev->dev, "%s - nonzero urb status received: %d",
 264                         __func__, urb->status);
 265                 break;
 266         }
 267
 268         retval = usb_submit_urb(urb, GFP_ATOMIC);
 269         if (retval)
 270                 dev_err(&dev->dev, "%s - usb_submit_urb failed with result %d",
 271                         __func__, retval);
 272 }
 273
 274 static int hanwang_open(struct input_dev *dev)
 275 {
 276         struct hanwang *hanwang = input_get_drvdata(dev);
 277
 278         hanwang->irq->dev = hanwang->usbdev;
 279         if (usb_submit_urb(hanwang->irq, GFP_KERNEL))
 280                 return -EIO;
 281
 282         return 0;
 283 }
 284
 285 static void hanwang_close(struct input_dev *dev)
 286 {
 287         struct hanwang *hanwang = input_get_drvdata(dev);
 288
 289         usb_kill_urb(hanwang->irq);
 290 }
 291
 292 static bool get_features(struct usb_device *dev, struct hanwang *hanwang)
 293 {
 294         int i;
 295
 296         for (i = 0; i < ARRAY_SIZE(features_array); i++) {
 297                 if (le16_to_cpu(dev->descriptor.idProduct) ==
 298                                 features_array[i].pid) {
 299                         hanwang->features = &features_array[i];
 300                         return true;
 301                 }
 302         }
 303
 304         return false;
 305 }
 306
 307
 308 static int hanwang_probe(struct usb_interface *intf, const struct usb_device_id *id)
 309 {
 310         struct usb_device *dev = interface_to_usbdev(intf);
 311         struct usb_endpoint_descriptor *endpoint;
 312         struct hanwang *hanwang;
 313         struct input_dev *input_dev;
 314         int error;
 315         int i;
 316
 317         hanwang = kzalloc(sizeof(struct hanwang), GFP_KERNEL);
 318         input_dev = input_allocate_device();
 319         if (!hanwang || !input_dev) {
 320                 error = -ENOMEM;
 321                 goto fail1;
 322         }
 323
 324         if (!get_features(dev, hanwang)) {
 325                 error = -ENXIO;
 326                 goto fail1;
 327         }
 328
 329         hanwang->data = usb_alloc_coherent(dev, hanwang->features->pkg_len,
 330                                         GFP_KERNEL, &hanwang->data_dma);
 331         if (!hanwang->data) {
 332                 error = -ENOMEM;
 333                 goto fail1;
 334         }
 335
 336         hanwang->irq = usb_alloc_urb(0, GFP_KERNEL);
 337         if (!hanwang->irq) {
 338                 error = -ENOMEM;
 339                 goto fail2;
 340         }
 341
 342         hanwang->usbdev = dev;
 343         hanwang->dev = input_dev;
 344
 345         usb_make_path(dev, hanwang->phys, sizeof(hanwang->phys));
 346         strlcat(hanwang->phys, "/input0", sizeof(hanwang->phys));
 347
 348         strlcpy(hanwang->name, hanwang->features->name, sizeof(hanwang->name));
 349         input_dev->name = hanwang->name;
 350         input_dev->phys = hanwang->phys;
 351         usb_to_input_id(dev, &input_dev->id);
 352         input_dev->dev.parent = &intf->dev;
 353
 354         input_set_drvdata(input_dev, hanwang);
 355
 356         input_dev->open = hanwang_open;
 357         input_dev->close = hanwang_close;
 358
 359         for (i = 0; i < ARRAY_SIZE(hw_eventtypes); ++i)
 360                 __set_bit(hw_eventtypes[i], input_dev->evbit);
 361
 362         for (i = 0; i < ARRAY_SIZE(hw_absevents); ++i)
 363                 __set_bit(hw_absevents[i], input_dev->absbit);
 364
 365         for (i = 0; i < ARRAY_SIZE(hw_btnevents); ++i)
 366                 __set_bit(hw_btnevents[i], input_dev->keybit);
 367
 368         for (i = 0; i < ARRAY_SIZE(hw_mscevents); ++i)
 369                 __set_bit(hw_mscevents[i], input_dev->mscbit);
 370
 371         input_set_abs_params(input_dev, ABS_X,
 372                              0, hanwang->features->max_x, 4, 0);
 373         input_set_abs_params(input_dev, ABS_Y,
 374                              0, hanwang->features->max_y, 4, 0);
 375         input_set_abs_params(input_dev, ABS_TILT_X,
 376                              0, hanwang->features->max_tilt_x, 0, 0);
 377         input_set_abs_params(input_dev, ABS_TILT_Y,
 378                              0, hanwang->features->max_tilt_y, 0, 0);
 379         input_set_abs_params(input_dev, ABS_PRESSURE,
 380                              0, hanwang->features->max_pressure, 0, 0);
 381
 382         endpoint = &intf->cur_altsetting->endpoint[0].desc;
 383         usb_fill_int_urb(hanwang->irq, dev,
 384                         usb_rcvintpipe(dev, endpoint->bEndpointAddress),
 385                         hanwang->data, hanwang->features->pkg_len,
 386                         hanwang_irq, hanwang, endpoint->bInterval);
 387         hanwang->irq->transfer_dma = hanwang->data_dma;
 388         hanwang->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
 389
 390         error = input_register_device(hanwang->dev);
 391         if (error)
 392                 goto fail3;
 393
 394         usb_set_intfdata(intf, hanwang);
 395
 396         return 0;
 397
 398  fail3: usb_free_urb(hanwang->irq);
 399  fail2: usb_free_coherent(dev, hanwang->features->pkg_len,
 400                         hanwang->data, hanwang->data_dma);
 401  fail1: input_free_device(input_dev);
 402         kfree(hanwang);
 403         return error;
 404
 405 }
 406
 407 static void hanwang_disconnect(struct usb_interface *intf)
 408 {
 409         struct hanwang *hanwang = usb_get_intfdata(intf);
 410
 411         input_unregister_device(hanwang->dev);
 412         usb_free_urb(hanwang->irq);
 413         usb_free_coherent(interface_to_usbdev(intf),
 414                         hanwang->features->pkg_len, hanwang->data,
 415                         hanwang->data_dma);
 416         kfree(hanwang);
 417         usb_set_intfdata(intf, NULL);
 418 }
 419
 420 static const struct usb_device_id hanwang_ids[] = {
 421         { HANWANG_TABLET_DEVICE(USB_VENDOR_ID_HANWANG, HANWANG_TABLET_INT_CLASS,
 422                 HANWANG_TABLET_INT_SUB_CLASS, HANWANG_TABLET_INT_PROTOCOL) },
 423         {}
 424 };
 425
 426 MODULE_DEVICE_TABLE(usb, hanwang_ids);
 427
 428 static struct usb_driver hanwang_driver = {
 429         .name           = "hanwang",
 430         .probe          = hanwang_probe,
 431         .disconnect     = hanwang_disconnect,
 432         .id_table       = hanwang_ids,
 433 };
 434
 435 static int __init hanwang_init(void)
 436 {
 437         return usb_register(&hanwang_driver);
 438 }
 439
 440 static void __exit hanwang_exit(void)
 441 {
 442         usb_deregister(&hanwang_driver);
 443 }
 444
 445 module_init(hanwang_init);
 446 module_exit(hanwang_exit);