drivers/usb/input/usbtouchscreen.c

   1 /******************************************************************************
   2  * usbtouchscreen.c
   3  * Driver for USB Touchscreens, supporting those devices:
   4  *  - eGalax Touchkit
   5  *    includes eTurboTouch CT-410/510/700
   6  *  - 3M/Microtouch  EX II series
   7  *  - ITM
   8  *  - PanJit TouchSet
   9  *  - eTurboTouch
  10  *  - Gunze AHL61
  11  *
  12  * Copyright (C) 2004-2006 by Daniel Ritz <daniel.ritz@gmx.ch>
  13  * Copyright (C) by Todd E. Johnson (mtouchusb.c)
  14  *
  15  * This program is free software; you can redistribute it and/or
  16  * modify it under the terms of the GNU General Public License as
  17  * published by the Free Software Foundation; either version 2 of the
  18  * License, or (at your option) any later version.
  19  *
  20  * This program is distributed in the hope that it will be useful, but
  21  * WITHOUT ANY WARRANTY; without even the implied warranty of
  22  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  23  * General Public License for more details.
  24  *
  25  * You should have received a copy of the GNU General Public License
  26  * along with this program; if not, write to the Free Software
  27  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  28  *
  29  * Driver is based on touchkitusb.c
  30  * - ITM parts are from itmtouch.c
  31  * - 3M parts are from mtouchusb.c
  32  * - PanJit parts are from an unmerged driver by Lanslott Gish
  33  *
  34  *****************************************************************************/
  35
  36 //#define DEBUG
  37
  38 #include <linux/kernel.h>
  39 #include <linux/slab.h>
  40 #include <linux/input.h>
  41 #include <linux/module.h>
  42 #include <linux/init.h>
  43 #include <linux/usb.h>
  44 #include <linux/usb/input.h>
  45
  46
  47 #define DRIVER_VERSION          "v0.4"
  48 #define DRIVER_AUTHOR           "Daniel Ritz <daniel.ritz@gmx.ch>"
  49 #define DRIVER_DESC             "USB Touchscreen Driver"
  50
  51 static int swap_xy;
  52 module_param(swap_xy, bool, 0644);
  53 MODULE_PARM_DESC(swap_xy, "If set X and Y axes are swapped.");
  54
  55 /* device specifc data/functions */
  56 struct usbtouch_usb;
  57 struct usbtouch_device_info {
  58         int min_xc, max_xc;
  59         int min_yc, max_yc;
  60         int min_press, max_press;
  61         int rept_size;
  62         int flags;
  63
  64         void (*process_pkt) (struct usbtouch_usb *usbtouch, unsigned char *pkt, int len);
  65         int  (*get_pkt_len) (unsigned char *pkt, int len);
  66         int  (*read_data)   (unsigned char *pkt, int *x, int *y, int *touch, int *press);
  67         int  (*init)        (struct usbtouch_usb *usbtouch);
  68 };
  69
  70 #define USBTOUCH_FLG_BUFFER     0x01
  71
  72
  73 /* a usbtouch device */
  74 struct usbtouch_usb {
  75         unsigned char *data;
  76         dma_addr_t data_dma;
  77         unsigned char *buffer;
  78         int buf_len;
  79         struct urb *irq;
  80         struct usb_device *udev;
  81         struct input_dev *input;
  82         struct usbtouch_device_info *type;
  83         char name[128];
  84         char phys[64];
  85 };
  86
  87
  88 #if defined(CONFIG_USB_TOUCHSCREEN_EGALAX) || defined(CONFIG_USB_TOUCHSCREEN_ETURBO)
  89 #define MULTI_PACKET
  90 #endif
  91
  92 #ifdef MULTI_PACKET
  93 static void usbtouch_process_multi(struct usbtouch_usb *usbtouch,
  94                                    unsigned char *pkt, int len);
  95 #endif
  96
  97 /* device types */
  98 enum {
  99         DEVTPYE_DUMMY = -1,
 100         DEVTYPE_EGALAX,
 101         DEVTYPE_PANJIT,
 102         DEVTYPE_3M,
 103         DEVTYPE_ITM,
 104         DEVTYPE_ETURBO,
 105         DEVTYPE_GUNZE,
 106 };
 107
 108 static struct usb_device_id usbtouch_devices[] = {
 109 #ifdef CONFIG_USB_TOUCHSCREEN_EGALAX
 110         {USB_DEVICE(0x3823, 0x0001), .driver_info = DEVTYPE_EGALAX},
 111         {USB_DEVICE(0x3823, 0x0002), .driver_info = DEVTYPE_EGALAX},
 112         {USB_DEVICE(0x0123, 0x0001), .driver_info = DEVTYPE_EGALAX},
 113         {USB_DEVICE(0x0eef, 0x0001), .driver_info = DEVTYPE_EGALAX},
 114         {USB_DEVICE(0x0eef, 0x0002), .driver_info = DEVTYPE_EGALAX},
 115         {USB_DEVICE(0x1234, 0x0001), .driver_info = DEVTYPE_EGALAX},
 116         {USB_DEVICE(0x1234, 0x0002), .driver_info = DEVTYPE_EGALAX},
 117 #endif
 118
 119 #ifdef CONFIG_USB_TOUCHSCREEN_PANJIT
 120         {USB_DEVICE(0x134c, 0x0001), .driver_info = DEVTYPE_PANJIT},
 121         {USB_DEVICE(0x134c, 0x0002), .driver_info = DEVTYPE_PANJIT},
 122         {USB_DEVICE(0x134c, 0x0003), .driver_info = DEVTYPE_PANJIT},
 123         {USB_DEVICE(0x134c, 0x0004), .driver_info = DEVTYPE_PANJIT},
 124 #endif
 125
 126 #ifdef CONFIG_USB_TOUCHSCREEN_3M
 127         {USB_DEVICE(0x0596, 0x0001), .driver_info = DEVTYPE_3M},
 128 #endif
 129
 130 #ifdef CONFIG_USB_TOUCHSCREEN_ITM
 131         {USB_DEVICE(0x0403, 0xf9e9), .driver_info = DEVTYPE_ITM},
 132 #endif
 133
 134 #ifdef CONFIG_USB_TOUCHSCREEN_ETURBO
 135         {USB_DEVICE(0x1234, 0x5678), .driver_info = DEVTYPE_ETURBO},
 136 #endif
 137
 138 #ifdef CONFIG_USB_TOUCHSCREEN_GUNZE
 139         {USB_DEVICE(0x0637, 0x0001), .driver_info = DEVTYPE_GUNZE},
 140 #endif
 141
 142         {}
 143 };
 144
 145
 146 /*****************************************************************************
 147  * eGalax part
 148  */
 149
 150 #ifdef CONFIG_USB_TOUCHSCREEN_EGALAX
 151
 152 #define EGALAX_PKT_TYPE_MASK            0xFE
 153 #define EGALAX_PKT_TYPE_REPT            0x80
 154 #define EGALAX_PKT_TYPE_DIAG            0x0A
 155
 156 static int egalax_read_data(unsigned char *pkt, int *x, int *y, int *touch, int *press)
 157 {
 158         if ((pkt[0] & EGALAX_PKT_TYPE_MASK) != EGALAX_PKT_TYPE_REPT)
 159                 return 0;
 160
 161         *x = ((pkt[3] & 0x0F) << 7) | (pkt[4] & 0x7F);
 162         *y = ((pkt[1] & 0x0F) << 7) | (pkt[2] & 0x7F);
 163         *touch = pkt[0] & 0x01;
 164
 165         return 1;
 166 }
 167
 168 static int egalax_get_pkt_len(unsigned char *buf, int len)
 169 {
 170         switch (buf[0] & EGALAX_PKT_TYPE_MASK) {
 171         case EGALAX_PKT_TYPE_REPT:
 172                 return 5;
 173
 174         case EGALAX_PKT_TYPE_DIAG:
 175                 if (len < 2)
 176                         return -1;
 177
 178                 return buf[1] + 2;
 179         }
 180
 181         return 0;
 182 }
 183 #endif
 184
 185
 186 /*****************************************************************************
 187  * PanJit Part
 188  */
 189 #ifdef CONFIG_USB_TOUCHSCREEN_PANJIT
 190 static int panjit_read_data(unsigned char *pkt, int *x, int *y, int *touch, int *press)
 191 {
 192         *x = ((pkt[2] & 0x0F) << 8) | pkt[1];
 193         *y = ((pkt[4] & 0x0F) << 8) | pkt[3];
 194         *touch = pkt[0] & 0x01;
 195
 196         return 1;
 197 }
 198 #endif
 199
 200
 201 /*****************************************************************************
 202  * 3M/Microtouch Part
 203  */
 204 #ifdef CONFIG_USB_TOUCHSCREEN_3M
 205
 206 #define MTOUCHUSB_ASYNC_REPORT          1
 207 #define MTOUCHUSB_RESET                 7
 208 #define MTOUCHUSB_REQ_CTRLLR_ID         10
 209
 210 static int mtouch_read_data(unsigned char *pkt, int *x, int *y, int *touch, int *press)
 211 {
 212         *x = (pkt[8] << 8) | pkt[7];
 213         *y = (pkt[10] << 8) | pkt[9];
 214         *touch = (pkt[2] & 0x40) ? 1 : 0;
 215
 216         return 1;
 217 }
 218
 219 static int mtouch_init(struct usbtouch_usb *usbtouch)
 220 {
 221         int ret, i;
 222
 223         ret = usb_control_msg(usbtouch->udev, usb_rcvctrlpipe(usbtouch->udev, 0),
 224                               MTOUCHUSB_RESET,
 225                               USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 226                               1, 0, NULL, 0, USB_CTRL_SET_TIMEOUT);
 227         dbg("%s - usb_control_msg - MTOUCHUSB_RESET - bytes|err: %d",
 228             __FUNCTION__, ret);
 229         if (ret < 0)
 230                 return ret;
 231         msleep(150);
 232
 233         for (i = 0; i < 3; i++) {
 234                 ret = usb_control_msg(usbtouch->udev, usb_rcvctrlpipe(usbtouch->udev, 0),
 235                                       MTOUCHUSB_ASYNC_REPORT,
 236                                       USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 237                                       1, 1, NULL, 0, USB_CTRL_SET_TIMEOUT);
 238                 dbg("%s - usb_control_msg - MTOUCHUSB_ASYNC_REPORT - bytes|err: %d",
 239                     __FUNCTION__, ret);
 240                 if (ret >= 0)
 241                         break;
 242                 if (ret != -EPIPE)
 243                         return ret;
 244         }
 245
 246         return 0;
 247 }
 248 #endif
 249
 250
 251 /*****************************************************************************
 252  * ITM Part
 253  */
 254 #ifdef CONFIG_USB_TOUCHSCREEN_ITM
 255 static int itm_read_data(unsigned char *pkt, int *x, int *y, int *touch, int *press)
 256 {
 257         *x = ((pkt[0] & 0x1F) << 7) | (pkt[3] & 0x7F);
 258         *y = ((pkt[1] & 0x1F) << 7) | (pkt[4] & 0x7F);
 259         *press = ((pkt[2] & 0x01) << 7) | (pkt[5] & 0x7F);
 260         *touch = ~pkt[7] & 0x20;
 261
 262         return *touch;
 263 }
 264 #endif
 265
 266
 267 /*****************************************************************************
 268  * eTurboTouch part
 269  */
 270 #ifdef CONFIG_USB_TOUCHSCREEN_ETURBO
 271 static int eturbo_read_data(unsigned char *pkt, int *x, int *y, int *touch, int *press)
 272 {
 273         unsigned int shift;
 274
 275         /* packets should start with sync */
 276         if (!(pkt[0] & 0x80))
 277                 return 0;
 278
 279         shift = (6 - (pkt[0] & 0x03));
 280         *x = ((pkt[3] << 7) | pkt[4]) >> shift;
 281         *y = ((pkt[1] << 7) | pkt[2]) >> shift;
 282         *touch = (pkt[0] & 0x10) ? 1 : 0;
 283
 284         return 1;
 285 }
 286
 287 static int eturbo_get_pkt_len(unsigned char *buf, int len)
 288 {
 289         if (buf[0] & 0x80)
 290                 return 5;
 291         if (buf[0] == 0x01)
 292                 return 3;
 293         return 0;
 294 }
 295 #endif
 296
 297
 298 /*****************************************************************************
 299  * Gunze part
 300  */
 301 #ifdef CONFIG_USB_TOUCHSCREEN_GUNZE
 302 static int gunze_read_data(unsigned char *pkt, int *x, int *y, int *touch, int *press)
 303 {
 304         if (!(pkt[0] & 0x80) || ((pkt[1] | pkt[2] | pkt[3]) & 0x80))
 305                 return 0;
 306
 307         *x = ((pkt[0] & 0x1F) << 7) | (pkt[2] & 0x7F);
 308         *y = ((pkt[1] & 0x1F) << 7) | (pkt[3] & 0x7F);
 309         *touch = pkt[0] & 0x20;
 310
 311         return 1;
 312 }
 313 #endif
 314
 315 /*****************************************************************************
 316  * the different device descriptors
 317  */
 318 static struct usbtouch_device_info usbtouch_dev_info[] = {
 319 #ifdef CONFIG_USB_TOUCHSCREEN_EGALAX
 320         [DEVTYPE_EGALAX] = {
 321                 .min_xc         = 0x0,
 322                 .max_xc         = 0x07ff,
 323                 .min_yc         = 0x0,
 324                 .max_yc         = 0x07ff,
 325                 .rept_size      = 16,
 326                 .flags          = USBTOUCH_FLG_BUFFER,
 327                 .process_pkt    = usbtouch_process_multi,
 328                 .get_pkt_len    = egalax_get_pkt_len,
 329                 .read_data      = egalax_read_data,
 330         },
 331 #endif
 332
 333 #ifdef CONFIG_USB_TOUCHSCREEN_PANJIT
 334         [DEVTYPE_PANJIT] = {
 335                 .min_xc         = 0x0,
 336                 .max_xc         = 0x0fff,
 337                 .min_yc         = 0x0,
 338                 .max_yc         = 0x0fff,
 339                 .rept_size      = 8,
 340                 .read_data      = panjit_read_data,
 341         },
 342 #endif
 343
 344 #ifdef CONFIG_USB_TOUCHSCREEN_3M
 345         [DEVTYPE_3M] = {
 346                 .min_xc         = 0x0,
 347                 .max_xc         = 0x4000,
 348                 .min_yc         = 0x0,
 349                 .max_yc         = 0x4000,
 350                 .rept_size      = 11,
 351                 .read_data      = mtouch_read_data,
 352                 .init           = mtouch_init,
 353         },
 354 #endif
 355
 356 #ifdef CONFIG_USB_TOUCHSCREEN_ITM
 357         [DEVTYPE_ITM] = {
 358                 .min_xc         = 0x0,
 359                 .max_xc         = 0x0fff,
 360                 .min_yc         = 0x0,
 361                 .max_yc         = 0x0fff,
 362                 .max_press      = 0xff,
 363                 .rept_size      = 8,
 364                 .read_data      = itm_read_data,
 365         },
 366 #endif
 367
 368 #ifdef CONFIG_USB_TOUCHSCREEN_ETURBO
 369         [DEVTYPE_ETURBO] = {
 370                 .min_xc         = 0x0,
 371                 .max_xc         = 0x07ff,
 372                 .min_yc         = 0x0,
 373                 .max_yc         = 0x07ff,
 374                 .rept_size      = 8,
 375                 .flags          = USBTOUCH_FLG_BUFFER,
 376                 .process_pkt    = usbtouch_process_multi,
 377                 .get_pkt_len    = eturbo_get_pkt_len,
 378                 .read_data      = eturbo_read_data,
 379         },
 380 #endif
 381
 382 #ifdef CONFIG_USB_TOUCHSCREEN_GUNZE
 383         [DEVTYPE_GUNZE] = {
 384                 .min_xc         = 0x0,
 385                 .max_xc         = 0x0fff,
 386                 .min_yc         = 0x0,
 387                 .max_yc         = 0x0fff,
 388                 .rept_size      = 4,
 389                 .read_data      = gunze_read_data,
 390         },
 391 #endif
 392 };
 393
 394
 395 /*****************************************************************************
 396  * Generic Part
 397  */
 398 static void usbtouch_process_pkt(struct usbtouch_usb *usbtouch,
 399                                  unsigned char *pkt, int len)
 400 {
 401         int x, y, touch, press;
 402         struct usbtouch_device_info *type = usbtouch->type;
 403
 404         if (!type->read_data(pkt, &x, &y, &touch, &press))
 405                         return;
 406
 407         input_report_key(usbtouch->input, BTN_TOUCH, touch);
 408
 409         if (swap_xy) {
 410                 input_report_abs(usbtouch->input, ABS_X, y);
 411                 input_report_abs(usbtouch->input, ABS_Y, x);
 412         } else {
 413                 input_report_abs(usbtouch->input, ABS_X, x);
 414                 input_report_abs(usbtouch->input, ABS_Y, y);
 415         }
 416         if (type->max_press)
 417                 input_report_abs(usbtouch->input, ABS_PRESSURE, press);
 418         input_sync(usbtouch->input);
 419 }
 420
 421
 422 #ifdef MULTI_PACKET
 423 static void usbtouch_process_multi(struct usbtouch_usb *usbtouch,
 424                                    unsigned char *pkt, int len)
 425 {
 426         unsigned char *buffer;
 427         int pkt_len, pos, buf_len, tmp;
 428
 429         /* process buffer */
 430         if (unlikely(usbtouch->buf_len)) {
 431                 /* try to get size */
 432                 pkt_len = usbtouch->type->get_pkt_len(
 433                                 usbtouch->buffer, usbtouch->buf_len);
 434
 435                 /* drop? */
 436                 if (unlikely(!pkt_len))
 437                         goto out_flush_buf;
 438
 439                 /* need to append -pkt_len bytes before able to get size */
 440                 if (unlikely(pkt_len < 0)) {
 441                         int append = -pkt_len;
 442                         if (unlikely(append > len))
 443                                append = len;
 444                         if (usbtouch->buf_len + append >= usbtouch->type->rept_size)
 445                                 goto out_flush_buf;
 446                         memcpy(usbtouch->buffer + usbtouch->buf_len, pkt, append);
 447                         usbtouch->buf_len += append;
 448
 449                         pkt_len = usbtouch->type->get_pkt_len(
 450                                         usbtouch->buffer, usbtouch->buf_len);
 451                         if (pkt_len < 0)
 452                                 return;
 453                 }
 454
 455                 /* append */
 456                 tmp = pkt_len - usbtouch->buf_len;
 457                 if (usbtouch->buf_len + tmp >= usbtouch->type->rept_size)
 458                         goto out_flush_buf;
 459                 memcpy(usbtouch->buffer + usbtouch->buf_len, pkt, tmp);
 460                 usbtouch_process_pkt(usbtouch, usbtouch->buffer, pkt_len);
 461
 462                 buffer = pkt + tmp;
 463                 buf_len = len - tmp;
 464         } else {
 465                 buffer = pkt;
 466                 buf_len = len;
 467         }
 468
 469         /* loop over the received packet, process */
 470         pos = 0;
 471         while (pos < buf_len) {
 472                 /* get packet len */
 473                 pkt_len = usbtouch->type->get_pkt_len(buffer + pos, len);
 474
 475                 /* unknown packet: drop everything */
 476                 if (unlikely(!pkt_len))
 477                         goto out_flush_buf;
 478
 479                 /* full packet: process */
 480                 if (likely((pkt_len > 0) && (pkt_len <= buf_len - pos))) {
 481                         usbtouch_process_pkt(usbtouch, buffer + pos, pkt_len);
 482                 } else {
 483                         /* incomplete packet: save in buffer */
 484                         memcpy(usbtouch->buffer, buffer + pos, buf_len - pos);
 485                         usbtouch->buf_len = buf_len - pos;
 486                         return;
 487                 }
 488                 pos += pkt_len;
 489         }
 490
 491 out_flush_buf:
 492         usbtouch->buf_len = 0;
 493         return;
 494 }
 495 #endif
 496
 497
 498 static void usbtouch_irq(struct urb *urb)
 499 {
 500         struct usbtouch_usb *usbtouch = urb->context;
 501         int retval;
 502
 503         switch (urb->status) {
 504         case 0:
 505                 /* success */
 506                 break;
 507         case -ETIME:
 508                 /* this urb is timing out */
 509                 dbg("%s - urb timed out - was the device unplugged?",
 510                     __FUNCTION__);
 511                 return;
 512         case -ECONNRESET:
 513         case -ENOENT:
 514         case -ESHUTDOWN:
 515                 /* this urb is terminated, clean up */
 516                 dbg("%s - urb shutting down with status: %d",
 517                     __FUNCTION__, urb->status);
 518                 return;
 519         default:
 520                 dbg("%s - nonzero urb status received: %d",
 521                     __FUNCTION__, urb->status);
 522                 goto exit;
 523         }
 524
 525         usbtouch->type->process_pkt(usbtouch, usbtouch->data, urb->actual_length);
 526
 527 exit:
 528         retval = usb_submit_urb(urb, GFP_ATOMIC);
 529         if (retval)
 530                 err("%s - usb_submit_urb failed with result: %d",
 531                     __FUNCTION__, retval);
 532 }
 533
 534 static int usbtouch_open(struct input_dev *input)
 535 {
 536         struct usbtouch_usb *usbtouch = input->private;
 537
 538         usbtouch->irq->dev = usbtouch->udev;
 539
 540         if (usb_submit_urb(usbtouch->irq, GFP_KERNEL))
 541                 return -EIO;
 542
 543         return 0;
 544 }
 545
 546 static void usbtouch_close(struct input_dev *input)
 547 {
 548         struct usbtouch_usb *usbtouch = input->private;
 549
 550         usb_kill_urb(usbtouch->irq);
 551 }
 552
 553
 554 static void usbtouch_free_buffers(struct usb_device *udev,
 555                                   struct usbtouch_usb *usbtouch)
 556 {
 557         if (usbtouch->data)
 558                 usb_buffer_free(udev, usbtouch->type->rept_size,
 559                                 usbtouch->data, usbtouch->data_dma);
 560         kfree(usbtouch->buffer);
 561 }
 562
 563
 564 static int usbtouch_probe(struct usb_interface *intf,
 565                           const struct usb_device_id *id)
 566 {
 567         struct usbtouch_usb *usbtouch;
 568         struct input_dev *input_dev;
 569         struct usb_host_interface *interface;
 570         struct usb_endpoint_descriptor *endpoint;
 571         struct usb_device *udev = interface_to_usbdev(intf);
 572         struct usbtouch_device_info *type;
 573         int err = -ENOMEM;
 574
 575         interface = intf->cur_altsetting;
 576         endpoint = &interface->endpoint[0].desc;
 577
 578         usbtouch = kzalloc(sizeof(struct usbtouch_usb), GFP_KERNEL);
 579         input_dev = input_allocate_device();
 580         if (!usbtouch || !input_dev)
 581                 goto out_free;
 582
 583         type = &usbtouch_dev_info[id->driver_info];
 584         usbtouch->type = type;
 585         if (!type->process_pkt)
 586                 type->process_pkt = usbtouch_process_pkt;
 587
 588         usbtouch->data = usb_buffer_alloc(udev, type->rept_size,
 589                                           SLAB_KERNEL, &usbtouch->data_dma);
 590         if (!usbtouch->data)
 591                 goto out_free;
 592
 593         if (type->flags & USBTOUCH_FLG_BUFFER) {
 594                 usbtouch->buffer = kmalloc(type->rept_size, GFP_KERNEL);
 595                 if (!usbtouch->buffer)
 596                         goto out_free_buffers;
 597         }
 598
 599         usbtouch->irq = usb_alloc_urb(0, GFP_KERNEL);
 600         if (!usbtouch->irq) {
 601                 dbg("%s - usb_alloc_urb failed: usbtouch->irq", __FUNCTION__);
 602                 goto out_free_buffers;
 603         }
 604
 605         usbtouch->udev = udev;
 606         usbtouch->input = input_dev;
 607
 608         if (udev->manufacturer)
 609                 strlcpy(usbtouch->name, udev->manufacturer, sizeof(usbtouch->name));
 610
 611         if (udev->product) {
 612                 if (udev->manufacturer)
 613                         strlcat(usbtouch->name, " ", sizeof(usbtouch->name));
 614                 strlcat(usbtouch->name, udev->product, sizeof(usbtouch->name));
 615         }
 616
 617         if (!strlen(usbtouch->name))
 618                 snprintf(usbtouch->name, sizeof(usbtouch->name),
 619                         "USB Touchscreen %04x:%04x",
 620                          le16_to_cpu(udev->descriptor.idVendor),
 621                          le16_to_cpu(udev->descriptor.idProduct));
 622
 623         usb_make_path(udev, usbtouch->phys, sizeof(usbtouch->phys));
 624         strlcpy(usbtouch->phys, "/input0", sizeof(usbtouch->phys));
 625
 626         input_dev->name = usbtouch->name;
 627         input_dev->phys = usbtouch->phys;
 628         usb_to_input_id(udev, &input_dev->id);
 629         input_dev->cdev.dev = &intf->dev;
 630         input_dev->private = usbtouch;
 631         input_dev->open = usbtouch_open;
 632         input_dev->close = usbtouch_close;
 633
 634         input_dev->evbit[0] = BIT(EV_KEY) | BIT(EV_ABS);
 635         input_dev->keybit[LONG(BTN_TOUCH)] = BIT(BTN_TOUCH);
 636         input_set_abs_params(input_dev, ABS_X, type->min_xc, type->max_xc, 0, 0);
 637         input_set_abs_params(input_dev, ABS_Y, type->min_yc, type->max_yc, 0, 0);
 638         if (type->max_press)
 639                 input_set_abs_params(input_dev, ABS_PRESSURE, type->min_press,
 640                                      type->max_press, 0, 0);
 641
 642         usb_fill_int_urb(usbtouch->irq, usbtouch->udev,
 643                          usb_rcvintpipe(usbtouch->udev, 0x81),
 644                          usbtouch->data, type->rept_size,
 645                          usbtouch_irq, usbtouch, endpoint->bInterval);
 646
 647         usbtouch->irq->dev = usbtouch->udev;
 648         usbtouch->irq->transfer_dma = usbtouch->data_dma;
 649         usbtouch->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
 650
 651         /* device specific init */
 652         if (type->init) {
 653                 err = type->init(usbtouch);
 654                 if (err) {
 655                         dbg("%s - type->init() failed, err: %d", __FUNCTION__, err);
 656                         goto out_free_buffers;
 657                 }
 658         }
 659
 660         err = input_register_device(usbtouch->input);
 661         if (err) {
 662                 dbg("%s - input_register_device failed, err: %d", __FUNCTION__, err);
 663                 goto out_free_buffers;
 664         }
 665
 666         usb_set_intfdata(intf, usbtouch);
 667
 668         return 0;
 669
 670 out_free_buffers:
 671         usbtouch_free_buffers(udev, usbtouch);
 672 out_free:
 673         input_free_device(input_dev);
 674         kfree(usbtouch);
 675         return err;
 676 }
 677
 678 static void usbtouch_disconnect(struct usb_interface *intf)
 679 {
 680         struct usbtouch_usb *usbtouch = usb_get_intfdata(intf);
 681
 682         dbg("%s - called", __FUNCTION__);
 683
 684         if (!usbtouch)
 685                 return;
 686
 687         dbg("%s - usbtouch is initialized, cleaning up", __FUNCTION__);
 688         usb_set_intfdata(intf, NULL);
 689         usb_kill_urb(usbtouch->irq);
 690         input_unregister_device(usbtouch->input);
 691         usb_free_urb(usbtouch->irq);
 692         usbtouch_free_buffers(interface_to_usbdev(intf), usbtouch);
 693         kfree(usbtouch);
 694 }
 695
 696 MODULE_DEVICE_TABLE(usb, usbtouch_devices);
 697
 698 static struct usb_driver usbtouch_driver = {
 699         .name           = "usbtouchscreen",
 700         .probe          = usbtouch_probe,
 701         .disconnect     = usbtouch_disconnect,
 702         .id_table       = usbtouch_devices,
 703 };
 704
 705 static int __init usbtouch_init(void)
 706 {
 707         return usb_register(&usbtouch_driver);
 708 }
 709
 710 static void __exit usbtouch_cleanup(void)
 711 {
 712         usb_deregister(&usbtouch_driver);
 713 }
 714
 715 module_init(usbtouch_init);
 716 module_exit(usbtouch_cleanup);
 717
 718 MODULE_AUTHOR(DRIVER_AUTHOR);
 719 MODULE_DESCRIPTION(DRIVER_DESC);
 720 MODULE_LICENSE("GPL");
 721
 722 MODULE_ALIAS("touchkitusb");
 723 MODULE_ALIAS("itmtouch");
 724 MODULE_ALIAS("mtouchusb");