drivers/input/touchscreen/usbtouchscreen.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /******************************************************************************
   3  * usbtouchscreen.c
   4  * Driver for USB Touchscreens, supporting those devices:
   5  *  - eGalax Touchkit
   6  *    includes eTurboTouch CT-410/510/700
   7  *  - 3M/Microtouch  EX II series
   8  *  - ITM
   9  *  - PanJit TouchSet
  10  *  - eTurboTouch
  11  *  - Gunze AHL61
  12  *  - DMC TSC-10/25
  13  *  - IRTOUCHSYSTEMS/UNITOP
  14  *  - IdealTEK URTC1000
  15  *  - General Touch
  16  *  - GoTop Super_Q2/GogoPen/PenPower tablets
  17  *  - JASTEC USB touch controller/DigiTech DTR-02U
  18  *  - Zytronic capacitive touchscreen
  19  *  - NEXIO/iNexio
  20  *  - Elo TouchSystems 2700 IntelliTouch
  21  *  - EasyTouch USB Dual/Multi touch controller from Data Modul
  22  *
  23  * Copyright (C) 2004-2007 by Daniel Ritz <daniel.ritz@gmx.ch>
  24  * Copyright (C) by Todd E. Johnson (mtouchusb.c)
  25  *
  26  * Driver is based on touchkitusb.c
  27  * - ITM parts are from itmtouch.c
  28  * - 3M parts are from mtouchusb.c
  29  * - PanJit parts are from an unmerged driver by Lanslott Gish
  30  * - DMC TSC 10/25 are from Holger Schurig, with ideas from an unmerged
  31  *   driver from Marius Vollmer
  32  *
  33  *****************************************************************************/
  34
  35 //#define DEBUG
  36
  37 #include <linux/kernel.h>
  38 #include <linux/slab.h>
  39 #include <linux/input.h>
  40 #include <linux/module.h>
  41 #include <linux/usb.h>
  42 #include <linux/usb/input.h>
  43 #include <linux/hid.h>
  44 #include <linux/mutex.h>
  45
  46 static bool swap_xy;
  47 module_param(swap_xy, bool, 0644);
  48 MODULE_PARM_DESC(swap_xy, "If set X and Y axes are swapped.");
  49
  50 static bool hwcalib_xy;
  51 module_param(hwcalib_xy, bool, 0644);
  52 MODULE_PARM_DESC(hwcalib_xy, "If set hw-calibrated X/Y are used if available");
  53
  54 /* device specifc data/functions */
  55 struct usbtouch_usb;
  56 struct usbtouch_device_info {
  57         int min_xc, max_xc;
  58         int min_yc, max_yc;
  59         int min_press, max_press;
  60         int rept_size;
  61
  62         /*
  63          * Always service the USB devices irq not just when the input device is
  64          * open. This is useful when devices have a watchdog which prevents us
  65          * from periodically polling the device. Leave this unset unless your
  66          * touchscreen device requires it, as it does consume more of the USB
  67          * bandwidth.
  68          */
  69         bool irq_always;
  70
  71         void (*process_pkt) (struct usbtouch_usb *usbtouch, unsigned char *pkt, int len);
  72
  73         /*
  74          * used to get the packet len. possible return values:
  75          * > 0: packet len
  76          * = 0: skip one byte
  77          * < 0: -return value more bytes needed
  78          */
  79         int  (*get_pkt_len) (unsigned char *pkt, int len);
  80
  81         int  (*read_data)   (struct usbtouch_usb *usbtouch, unsigned char *pkt);
  82         int  (*alloc)       (struct usbtouch_usb *usbtouch);
  83         int  (*init)        (struct usbtouch_usb *usbtouch);
  84         void (*exit)        (struct usbtouch_usb *usbtouch);
  85 };
  86
  87 /* a usbtouch device */
  88 struct usbtouch_usb {
  89         unsigned char *data;
  90         dma_addr_t data_dma;
  91         int data_size;
  92         unsigned char *buffer;
  93         int buf_len;
  94         struct urb *irq;
  95         struct usb_interface *interface;
  96         struct input_dev *input;
  97         struct usbtouch_device_info *type;
  98         struct mutex pm_mutex;  /* serialize access to open/suspend */
  99         bool is_open;
 100         char name[128];
 101         char phys[64];
 102         void *priv;
 103
 104         int x, y;
 105         int touch, press;
 106 };
 107
 108
 109 /* device types */
 110 enum {
 111         DEVTYPE_IGNORE = -1,
 112         DEVTYPE_EGALAX,
 113         DEVTYPE_PANJIT,
 114         DEVTYPE_3M,
 115         DEVTYPE_ITM,
 116         DEVTYPE_ETURBO,
 117         DEVTYPE_GUNZE,
 118         DEVTYPE_DMC_TSC10,
 119         DEVTYPE_IRTOUCH,
 120         DEVTYPE_IRTOUCH_HIRES,
 121         DEVTYPE_IDEALTEK,
 122         DEVTYPE_GENERAL_TOUCH,
 123         DEVTYPE_GOTOP,
 124         DEVTYPE_JASTEC,
 125         DEVTYPE_E2I,
 126         DEVTYPE_ZYTRONIC,
 127         DEVTYPE_TC45USB,
 128         DEVTYPE_NEXIO,
 129         DEVTYPE_ELO,
 130         DEVTYPE_ETOUCH,
 131 };
 132
 133 #define USB_DEVICE_HID_CLASS(vend, prod) \
 134         .match_flags = USB_DEVICE_ID_MATCH_INT_CLASS \
 135                 | USB_DEVICE_ID_MATCH_DEVICE, \
 136         .idVendor = (vend), \
 137         .idProduct = (prod), \
 138         .bInterfaceClass = USB_INTERFACE_CLASS_HID
 139
 140 static const struct usb_device_id usbtouch_devices[] = {
 141 #ifdef CONFIG_TOUCHSCREEN_USB_EGALAX
 142         /* ignore the HID capable devices, handled by usbhid */
 143         {USB_DEVICE_HID_CLASS(0x0eef, 0x0001), .driver_info = DEVTYPE_IGNORE},
 144         {USB_DEVICE_HID_CLASS(0x0eef, 0x0002), .driver_info = DEVTYPE_IGNORE},
 145
 146         /* normal device IDs */
 147         {USB_DEVICE(0x3823, 0x0001), .driver_info = DEVTYPE_EGALAX},
 148         {USB_DEVICE(0x3823, 0x0002), .driver_info = DEVTYPE_EGALAX},
 149         {USB_DEVICE(0x0123, 0x0001), .driver_info = DEVTYPE_EGALAX},
 150         {USB_DEVICE(0x0eef, 0x0001), .driver_info = DEVTYPE_EGALAX},
 151         {USB_DEVICE(0x0eef, 0x0002), .driver_info = DEVTYPE_EGALAX},
 152         {USB_DEVICE(0x1234, 0x0001), .driver_info = DEVTYPE_EGALAX},
 153         {USB_DEVICE(0x1234, 0x0002), .driver_info = DEVTYPE_EGALAX},
 154 #endif
 155
 156 #ifdef CONFIG_TOUCHSCREEN_USB_PANJIT
 157         {USB_DEVICE(0x134c, 0x0001), .driver_info = DEVTYPE_PANJIT},
 158         {USB_DEVICE(0x134c, 0x0002), .driver_info = DEVTYPE_PANJIT},
 159         {USB_DEVICE(0x134c, 0x0003), .driver_info = DEVTYPE_PANJIT},
 160         {USB_DEVICE(0x134c, 0x0004), .driver_info = DEVTYPE_PANJIT},
 161 #endif
 162
 163 #ifdef CONFIG_TOUCHSCREEN_USB_3M
 164         {USB_DEVICE(0x0596, 0x0001), .driver_info = DEVTYPE_3M},
 165 #endif
 166
 167 #ifdef CONFIG_TOUCHSCREEN_USB_ITM
 168         {USB_DEVICE(0x0403, 0xf9e9), .driver_info = DEVTYPE_ITM},
 169         {USB_DEVICE(0x16e3, 0xf9e9), .driver_info = DEVTYPE_ITM},
 170 #endif
 171
 172 #ifdef CONFIG_TOUCHSCREEN_USB_ETURBO
 173         {USB_DEVICE(0x1234, 0x5678), .driver_info = DEVTYPE_ETURBO},
 174 #endif
 175
 176 #ifdef CONFIG_TOUCHSCREEN_USB_GUNZE
 177         {USB_DEVICE(0x0637, 0x0001), .driver_info = DEVTYPE_GUNZE},
 178 #endif
 179
 180 #ifdef CONFIG_TOUCHSCREEN_USB_DMC_TSC10
 181         {USB_DEVICE(0x0afa, 0x03e8), .driver_info = DEVTYPE_DMC_TSC10},
 182 #endif
 183
 184 #ifdef CONFIG_TOUCHSCREEN_USB_IRTOUCH
 185         {USB_DEVICE(0x595a, 0x0001), .driver_info = DEVTYPE_IRTOUCH},
 186         {USB_DEVICE(0x6615, 0x0001), .driver_info = DEVTYPE_IRTOUCH},
 187         {USB_DEVICE(0x6615, 0x0012), .driver_info = DEVTYPE_IRTOUCH_HIRES},
 188 #endif
 189
 190 #ifdef CONFIG_TOUCHSCREEN_USB_IDEALTEK
 191         {USB_DEVICE(0x1391, 0x1000), .driver_info = DEVTYPE_IDEALTEK},
 192 #endif
 193
 194 #ifdef CONFIG_TOUCHSCREEN_USB_GENERAL_TOUCH
 195         {USB_DEVICE(0x0dfc, 0x0001), .driver_info = DEVTYPE_GENERAL_TOUCH},
 196 #endif
 197
 198 #ifdef CONFIG_TOUCHSCREEN_USB_GOTOP
 199         {USB_DEVICE(0x08f2, 0x007f), .driver_info = DEVTYPE_GOTOP},
 200         {USB_DEVICE(0x08f2, 0x00ce), .driver_info = DEVTYPE_GOTOP},
 201         {USB_DEVICE(0x08f2, 0x00f4), .driver_info = DEVTYPE_GOTOP},
 202 #endif
 203
 204 #ifdef CONFIG_TOUCHSCREEN_USB_JASTEC
 205         {USB_DEVICE(0x0f92, 0x0001), .driver_info = DEVTYPE_JASTEC},
 206 #endif
 207
 208 #ifdef CONFIG_TOUCHSCREEN_USB_E2I
 209         {USB_DEVICE(0x1ac7, 0x0001), .driver_info = DEVTYPE_E2I},
 210 #endif
 211
 212 #ifdef CONFIG_TOUCHSCREEN_USB_ZYTRONIC
 213         {USB_DEVICE(0x14c8, 0x0003), .driver_info = DEVTYPE_ZYTRONIC},
 214 #endif
 215
 216 #ifdef CONFIG_TOUCHSCREEN_USB_ETT_TC45USB
 217         /* TC5UH */
 218         {USB_DEVICE(0x0664, 0x0309), .driver_info = DEVTYPE_TC45USB},
 219         /* TC4UM */
 220         {USB_DEVICE(0x0664, 0x0306), .driver_info = DEVTYPE_TC45USB},
 221 #endif
 222
 223 #ifdef CONFIG_TOUCHSCREEN_USB_NEXIO
 224         /* data interface only */
 225         {USB_DEVICE_AND_INTERFACE_INFO(0x10f0, 0x2002, 0x0a, 0x00, 0x00),
 226                 .driver_info = DEVTYPE_NEXIO},
 227         {USB_DEVICE_AND_INTERFACE_INFO(0x1870, 0x0001, 0x0a, 0x00, 0x00),
 228                 .driver_info = DEVTYPE_NEXIO},
 229 #endif
 230
 231 #ifdef CONFIG_TOUCHSCREEN_USB_ELO
 232         {USB_DEVICE(0x04e7, 0x0020), .driver_info = DEVTYPE_ELO},
 233 #endif
 234
 235 #ifdef CONFIG_TOUCHSCREEN_USB_EASYTOUCH
 236         {USB_DEVICE(0x7374, 0x0001), .driver_info = DEVTYPE_ETOUCH},
 237 #endif
 238
 239         {}
 240 };
 241
 242
 243 /*****************************************************************************
 244  * e2i Part
 245  */
 246
 247 #ifdef CONFIG_TOUCHSCREEN_USB_E2I
 248 static int e2i_init(struct usbtouch_usb *usbtouch)
 249 {
 250         int ret;
 251         struct usb_device *udev = interface_to_usbdev(usbtouch->interface);
 252
 253         ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
 254                               0x01, 0x02, 0x0000, 0x0081,
 255                               NULL, 0, USB_CTRL_SET_TIMEOUT);
 256
 257         dev_dbg(&usbtouch->interface->dev,
 258                 "%s - usb_control_msg - E2I_RESET - bytes|err: %d\n",
 259                 __func__, ret);
 260         return ret;
 261 }
 262
 263 static int e2i_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 264 {
 265         int tmp = (pkt[0] << 8) | pkt[1];
 266         dev->x  = (pkt[2] << 8) | pkt[3];
 267         dev->y  = (pkt[4] << 8) | pkt[5];
 268
 269         tmp = tmp - 0xA000;
 270         dev->touch = (tmp > 0);
 271         dev->press = (tmp > 0 ? tmp : 0);
 272
 273         return 1;
 274 }
 275 #endif
 276
 277
 278 /*****************************************************************************
 279  * eGalax part
 280  */
 281
 282 #ifdef CONFIG_TOUCHSCREEN_USB_EGALAX
 283
 284 #ifndef MULTI_PACKET
 285 #define MULTI_PACKET
 286 #endif
 287
 288 #define EGALAX_PKT_TYPE_MASK            0xFE
 289 #define EGALAX_PKT_TYPE_REPT            0x80
 290 #define EGALAX_PKT_TYPE_DIAG            0x0A
 291
 292 static int egalax_init(struct usbtouch_usb *usbtouch)
 293 {
 294         int ret, i;
 295         unsigned char *buf;
 296         struct usb_device *udev = interface_to_usbdev(usbtouch->interface);
 297
 298         /*
 299          * An eGalax diagnostic packet kicks the device into using the right
 300          * protocol.  We send a "check active" packet.  The response will be
 301          * read later and ignored.
 302          */
 303
 304         buf = kmalloc(3, GFP_KERNEL);
 305         if (!buf)
 306                 return -ENOMEM;
 307
 308         buf[0] = EGALAX_PKT_TYPE_DIAG;
 309         buf[1] = 1;     /* length */
 310         buf[2] = 'A';   /* command - check active */
 311
 312         for (i = 0; i < 3; i++) {
 313                 ret = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
 314                                       0,
 315                                       USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 316                                       0, 0, buf, 3,
 317                                       USB_CTRL_SET_TIMEOUT);
 318                 if (ret >= 0) {
 319                         ret = 0;
 320                         break;
 321                 }
 322                 if (ret != -EPIPE)
 323                         break;
 324         }
 325
 326         kfree(buf);
 327
 328         return ret;
 329 }
 330
 331 static int egalax_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 332 {
 333         if ((pkt[0] & EGALAX_PKT_TYPE_MASK) != EGALAX_PKT_TYPE_REPT)
 334                 return 0;
 335
 336         dev->x = ((pkt[3] & 0x0F) << 7) | (pkt[4] & 0x7F);
 337         dev->y = ((pkt[1] & 0x0F) << 7) | (pkt[2] & 0x7F);
 338         dev->touch = pkt[0] & 0x01;
 339
 340         return 1;
 341 }
 342
 343 static int egalax_get_pkt_len(unsigned char *buf, int len)
 344 {
 345         switch (buf[0] & EGALAX_PKT_TYPE_MASK) {
 346         case EGALAX_PKT_TYPE_REPT:
 347                 return 5;
 348
 349         case EGALAX_PKT_TYPE_DIAG:
 350                 if (len < 2)
 351                         return -1;
 352
 353                 return buf[1] + 2;
 354         }
 355
 356         return 0;
 357 }
 358 #endif
 359
 360 /*****************************************************************************
 361  * EasyTouch part
 362  */
 363
 364 #ifdef CONFIG_TOUCHSCREEN_USB_EASYTOUCH
 365
 366 #ifndef MULTI_PACKET
 367 #define MULTI_PACKET
 368 #endif
 369
 370 #define ETOUCH_PKT_TYPE_MASK            0xFE
 371 #define ETOUCH_PKT_TYPE_REPT            0x80
 372 #define ETOUCH_PKT_TYPE_REPT2           0xB0
 373 #define ETOUCH_PKT_TYPE_DIAG            0x0A
 374
 375 static int etouch_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 376 {
 377         if ((pkt[0] & ETOUCH_PKT_TYPE_MASK) != ETOUCH_PKT_TYPE_REPT &&
 378                 (pkt[0] & ETOUCH_PKT_TYPE_MASK) != ETOUCH_PKT_TYPE_REPT2)
 379                 return 0;
 380
 381         dev->x = ((pkt[1] & 0x1F) << 7) | (pkt[2] & 0x7F);
 382         dev->y = ((pkt[3] & 0x1F) << 7) | (pkt[4] & 0x7F);
 383         dev->touch = pkt[0] & 0x01;
 384
 385         return 1;
 386 }
 387
 388 static int etouch_get_pkt_len(unsigned char *buf, int len)
 389 {
 390         switch (buf[0] & ETOUCH_PKT_TYPE_MASK) {
 391         case ETOUCH_PKT_TYPE_REPT:
 392         case ETOUCH_PKT_TYPE_REPT2:
 393                 return 5;
 394
 395         case ETOUCH_PKT_TYPE_DIAG:
 396                 if (len < 2)
 397                         return -1;
 398
 399                 return buf[1] + 2;
 400         }
 401
 402         return 0;
 403 }
 404 #endif
 405
 406 /*****************************************************************************
 407  * PanJit Part
 408  */
 409 #ifdef CONFIG_TOUCHSCREEN_USB_PANJIT
 410 static int panjit_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 411 {
 412         dev->x = ((pkt[2] & 0x0F) << 8) | pkt[1];
 413         dev->y = ((pkt[4] & 0x0F) << 8) | pkt[3];
 414         dev->touch = pkt[0] & 0x01;
 415
 416         return 1;
 417 }
 418 #endif
 419
 420
 421 /*****************************************************************************
 422  * 3M/Microtouch Part
 423  */
 424 #ifdef CONFIG_TOUCHSCREEN_USB_3M
 425
 426 #define MTOUCHUSB_ASYNC_REPORT          1
 427 #define MTOUCHUSB_RESET                 7
 428 #define MTOUCHUSB_REQ_CTRLLR_ID         10
 429
 430 #define MTOUCHUSB_REQ_CTRLLR_ID_LEN     16
 431
 432 static int mtouch_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 433 {
 434         if (hwcalib_xy) {
 435                 dev->x = (pkt[4] << 8) | pkt[3];
 436                 dev->y = 0xffff - ((pkt[6] << 8) | pkt[5]);
 437         } else {
 438                 dev->x = (pkt[8] << 8) | pkt[7];
 439                 dev->y = (pkt[10] << 8) | pkt[9];
 440         }
 441         dev->touch = (pkt[2] & 0x40) ? 1 : 0;
 442
 443         return 1;
 444 }
 445
 446 struct mtouch_priv {
 447         u8 fw_rev_major;
 448         u8 fw_rev_minor;
 449 };
 450
 451 static ssize_t mtouch_firmware_rev_show(struct device *dev,
 452                                 struct device_attribute *attr, char *output)
 453 {
 454         struct usb_interface *intf = to_usb_interface(dev);
 455         struct usbtouch_usb *usbtouch = usb_get_intfdata(intf);
 456         struct mtouch_priv *priv = usbtouch->priv;
 457
 458         return scnprintf(output, PAGE_SIZE, "%1x.%1x\n",
 459                          priv->fw_rev_major, priv->fw_rev_minor);
 460 }
 461 static DEVICE_ATTR(firmware_rev, 0444, mtouch_firmware_rev_show, NULL);
 462
 463 static struct attribute *mtouch_attrs[] = {
 464         &dev_attr_firmware_rev.attr,
 465         NULL
 466 };
 467
 468 static const struct attribute_group mtouch_attr_group = {
 469         .attrs = mtouch_attrs,
 470 };
 471
 472 static int mtouch_get_fw_revision(struct usbtouch_usb *usbtouch)
 473 {
 474         struct usb_device *udev = interface_to_usbdev(usbtouch->interface);
 475         struct mtouch_priv *priv = usbtouch->priv;
 476         u8 *buf;
 477         int ret;
 478
 479         buf = kzalloc(MTOUCHUSB_REQ_CTRLLR_ID_LEN, GFP_NOIO);
 480         if (!buf)
 481                 return -ENOMEM;
 482
 483         ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
 484                               MTOUCHUSB_REQ_CTRLLR_ID,
 485                               USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 486                               0, 0, buf, MTOUCHUSB_REQ_CTRLLR_ID_LEN,
 487                               USB_CTRL_SET_TIMEOUT);
 488         if (ret != MTOUCHUSB_REQ_CTRLLR_ID_LEN) {
 489                 dev_warn(&usbtouch->interface->dev,
 490                          "Failed to read FW rev: %d\n", ret);
 491                 ret = ret < 0 ? ret : -EIO;
 492                 goto free;
 493         }
 494
 495         priv->fw_rev_major = buf[3];
 496         priv->fw_rev_minor = buf[4];
 497
 498         ret = 0;
 499
 500 free:
 501         kfree(buf);
 502         return ret;
 503 }
 504
 505 static int mtouch_alloc(struct usbtouch_usb *usbtouch)
 506 {
 507         int ret;
 508
 509         usbtouch->priv = kmalloc(sizeof(struct mtouch_priv), GFP_KERNEL);
 510         if (!usbtouch->priv)
 511                 return -ENOMEM;
 512
 513         ret = sysfs_create_group(&usbtouch->interface->dev.kobj,
 514                                  &mtouch_attr_group);
 515         if (ret) {
 516                 kfree(usbtouch->priv);
 517                 usbtouch->priv = NULL;
 518                 return ret;
 519         }
 520
 521         return 0;
 522 }
 523
 524 static int mtouch_init(struct usbtouch_usb *usbtouch)
 525 {
 526         int ret, i;
 527         struct usb_device *udev = interface_to_usbdev(usbtouch->interface);
 528
 529         ret = mtouch_get_fw_revision(usbtouch);
 530         if (ret)
 531                 return ret;
 532
 533         ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
 534                               MTOUCHUSB_RESET,
 535                               USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 536                               1, 0, NULL, 0, USB_CTRL_SET_TIMEOUT);
 537         dev_dbg(&usbtouch->interface->dev,
 538                 "%s - usb_control_msg - MTOUCHUSB_RESET - bytes|err: %d\n",
 539                 __func__, ret);
 540         if (ret < 0)
 541                 return ret;
 542         msleep(150);
 543
 544         for (i = 0; i < 3; i++) {
 545                 ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
 546                                       MTOUCHUSB_ASYNC_REPORT,
 547                                       USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 548                                       1, 1, NULL, 0, USB_CTRL_SET_TIMEOUT);
 549                 dev_dbg(&usbtouch->interface->dev,
 550                         "%s - usb_control_msg - MTOUCHUSB_ASYNC_REPORT - bytes|err: %d\n",
 551                         __func__, ret);
 552                 if (ret >= 0)
 553                         break;
 554                 if (ret != -EPIPE)
 555                         return ret;
 556         }
 557
 558         /* Default min/max xy are the raw values, override if using hw-calib */
 559         if (hwcalib_xy) {
 560                 input_set_abs_params(usbtouch->input, ABS_X, 0, 0xffff, 0, 0);
 561                 input_set_abs_params(usbtouch->input, ABS_Y, 0, 0xffff, 0, 0);
 562         }
 563
 564         return 0;
 565 }
 566
 567 static void mtouch_exit(struct usbtouch_usb *usbtouch)
 568 {
 569         struct mtouch_priv *priv = usbtouch->priv;
 570
 571         sysfs_remove_group(&usbtouch->interface->dev.kobj, &mtouch_attr_group);
 572         kfree(priv);
 573 }
 574 #endif
 575
 576
 577 /*****************************************************************************
 578  * ITM Part
 579  */
 580 #ifdef CONFIG_TOUCHSCREEN_USB_ITM
 581 static int itm_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 582 {
 583         int touch;
 584         /*
 585          * ITM devices report invalid x/y data if not touched.
 586          * if the screen was touched before but is not touched any more
 587          * report touch as 0 with the last valid x/y data once. then stop
 588          * reporting data until touched again.
 589          */
 590         dev->press = ((pkt[2] & 0x01) << 7) | (pkt[5] & 0x7F);
 591
 592         touch = ~pkt[7] & 0x20;
 593         if (!touch) {
 594                 if (dev->touch) {
 595                         dev->touch = 0;
 596                         return 1;
 597                 }
 598
 599                 return 0;
 600         }
 601
 602         dev->x = ((pkt[0] & 0x1F) << 7) | (pkt[3] & 0x7F);
 603         dev->y = ((pkt[1] & 0x1F) << 7) | (pkt[4] & 0x7F);
 604         dev->touch = touch;
 605
 606         return 1;
 607 }
 608 #endif
 609
 610
 611 /*****************************************************************************
 612  * eTurboTouch part
 613  */
 614 #ifdef CONFIG_TOUCHSCREEN_USB_ETURBO
 615 #ifndef MULTI_PACKET
 616 #define MULTI_PACKET
 617 #endif
 618 static int eturbo_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 619 {
 620         unsigned int shift;
 621
 622         /* packets should start with sync */
 623         if (!(pkt[0] & 0x80))
 624                 return 0;
 625
 626         shift = (6 - (pkt[0] & 0x03));
 627         dev->x = ((pkt[3] << 7) | pkt[4]) >> shift;
 628         dev->y = ((pkt[1] << 7) | pkt[2]) >> shift;
 629         dev->touch = (pkt[0] & 0x10) ? 1 : 0;
 630
 631         return 1;
 632 }
 633
 634 static int eturbo_get_pkt_len(unsigned char *buf, int len)
 635 {
 636         if (buf[0] & 0x80)
 637                 return 5;
 638         if (buf[0] == 0x01)
 639                 return 3;
 640         return 0;
 641 }
 642 #endif
 643
 644
 645 /*****************************************************************************
 646  * Gunze part
 647  */
 648 #ifdef CONFIG_TOUCHSCREEN_USB_GUNZE
 649 static int gunze_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 650 {
 651         if (!(pkt[0] & 0x80) || ((pkt[1] | pkt[2] | pkt[3]) & 0x80))
 652                 return 0;
 653
 654         dev->x = ((pkt[0] & 0x1F) << 7) | (pkt[2] & 0x7F);
 655         dev->y = ((pkt[1] & 0x1F) << 7) | (pkt[3] & 0x7F);
 656         dev->touch = pkt[0] & 0x20;
 657
 658         return 1;
 659 }
 660 #endif
 661
 662 /*****************************************************************************
 663  * DMC TSC-10/25 Part
 664  *
 665  * Documentation about the controller and it's protocol can be found at
 666  *   http://www.dmccoltd.com/files/controler/tsc10usb_pi_e.pdf
 667  *   http://www.dmccoltd.com/files/controler/tsc25_usb_e.pdf
 668  */
 669 #ifdef CONFIG_TOUCHSCREEN_USB_DMC_TSC10
 670
 671 /* supported data rates. currently using 130 */
 672 #define TSC10_RATE_POINT        0x50
 673 #define TSC10_RATE_30           0x40
 674 #define TSC10_RATE_50           0x41
 675 #define TSC10_RATE_80           0x42
 676 #define TSC10_RATE_100          0x43
 677 #define TSC10_RATE_130          0x44
 678 #define TSC10_RATE_150          0x45
 679
 680 /* commands */
 681 #define TSC10_CMD_RESET         0x55
 682 #define TSC10_CMD_RATE          0x05
 683 #define TSC10_CMD_DATA1         0x01
 684
 685 static int dmc_tsc10_init(struct usbtouch_usb *usbtouch)
 686 {
 687         struct usb_device *dev = interface_to_usbdev(usbtouch->interface);
 688         int ret = -ENOMEM;
 689         unsigned char *buf;
 690
 691         buf = kmalloc(2, GFP_NOIO);
 692         if (!buf)
 693                 goto err_nobuf;
 694         /* reset */
 695         buf[0] = buf[1] = 0xFF;
 696         ret = usb_control_msg(dev, usb_rcvctrlpipe (dev, 0),
 697                               TSC10_CMD_RESET,
 698                               USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 699                               0, 0, buf, 2, USB_CTRL_SET_TIMEOUT);
 700         if (ret < 0)
 701                 goto err_out;
 702         if (buf[0] != 0x06) {
 703                 ret = -ENODEV;
 704                 goto err_out;
 705         }
 706
 707         /* TSC-25 data sheet specifies a delay after the RESET command */
 708         msleep(150);
 709
 710         /* set coordinate output rate */
 711         buf[0] = buf[1] = 0xFF;
 712         ret = usb_control_msg(dev, usb_rcvctrlpipe (dev, 0),
 713                               TSC10_CMD_RATE,
 714                               USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 715                               TSC10_RATE_150, 0, buf, 2, USB_CTRL_SET_TIMEOUT);
 716         if (ret < 0)
 717                 goto err_out;
 718         if ((buf[0] != 0x06) && (buf[0] != 0x15 || buf[1] != 0x01)) {
 719                 ret = -ENODEV;
 720                 goto err_out;
 721         }
 722
 723         /* start sending data */
 724         ret = usb_control_msg(dev, usb_rcvctrlpipe (dev, 0),
 725                               TSC10_CMD_DATA1,
 726                               USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 727                               0, 0, NULL, 0, USB_CTRL_SET_TIMEOUT);
 728 err_out:
 729         kfree(buf);
 730 err_nobuf:
 731         return ret;
 732 }
 733
 734
 735 static int dmc_tsc10_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 736 {
 737         dev->x = ((pkt[2] & 0x03) << 8) | pkt[1];
 738         dev->y = ((pkt[4] & 0x03) << 8) | pkt[3];
 739         dev->touch = pkt[0] & 0x01;
 740
 741         return 1;
 742 }
 743 #endif
 744
 745
 746 /*****************************************************************************
 747  * IRTOUCH Part
 748  */
 749 #ifdef CONFIG_TOUCHSCREEN_USB_IRTOUCH
 750 static int irtouch_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 751 {
 752         dev->x = (pkt[3] << 8) | pkt[2];
 753         dev->y = (pkt[5] << 8) | pkt[4];
 754         dev->touch = (pkt[1] & 0x03) ? 1 : 0;
 755
 756         return 1;
 757 }
 758 #endif
 759
 760 /*****************************************************************************
 761  * ET&T TC5UH/TC4UM part
 762  */
 763 #ifdef CONFIG_TOUCHSCREEN_USB_ETT_TC45USB
 764 static int tc45usb_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 765 {
 766         dev->x = ((pkt[2] & 0x0F) << 8) | pkt[1];
 767         dev->y = ((pkt[4] & 0x0F) << 8) | pkt[3];
 768         dev->touch = pkt[0] & 0x01;
 769
 770         return 1;
 771 }
 772 #endif
 773
 774 /*****************************************************************************
 775  * IdealTEK URTC1000 Part
 776  */
 777 #ifdef CONFIG_TOUCHSCREEN_USB_IDEALTEK
 778 #ifndef MULTI_PACKET
 779 #define MULTI_PACKET
 780 #endif
 781 static int idealtek_get_pkt_len(unsigned char *buf, int len)
 782 {
 783         if (buf[0] & 0x80)
 784                 return 5;
 785         if (buf[0] == 0x01)
 786                 return len;
 787         return 0;
 788 }
 789
 790 static int idealtek_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 791 {
 792         switch (pkt[0] & 0x98) {
 793         case 0x88:
 794                 /* touch data in IdealTEK mode */
 795                 dev->x = (pkt[1] << 5) | (pkt[2] >> 2);
 796                 dev->y = (pkt[3] << 5) | (pkt[4] >> 2);
 797                 dev->touch = (pkt[0] & 0x40) ? 1 : 0;
 798                 return 1;
 799
 800         case 0x98:
 801                 /* touch data in MT emulation mode */
 802                 dev->x = (pkt[2] << 5) | (pkt[1] >> 2);
 803                 dev->y = (pkt[4] << 5) | (pkt[3] >> 2);
 804                 dev->touch = (pkt[0] & 0x40) ? 1 : 0;
 805                 return 1;
 806
 807         default:
 808                 return 0;
 809         }
 810 }
 811 #endif
 812
 813 /*****************************************************************************
 814  * General Touch Part
 815  */
 816 #ifdef CONFIG_TOUCHSCREEN_USB_GENERAL_TOUCH
 817 static int general_touch_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 818 {
 819         dev->x = (pkt[2] << 8) | pkt[1];
 820         dev->y = (pkt[4] << 8) | pkt[3];
 821         dev->press = pkt[5] & 0xff;
 822         dev->touch = pkt[0] & 0x01;
 823
 824         return 1;
 825 }
 826 #endif
 827
 828 /*****************************************************************************
 829  * GoTop Part
 830  */
 831 #ifdef CONFIG_TOUCHSCREEN_USB_GOTOP
 832 static int gotop_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 833 {
 834         dev->x = ((pkt[1] & 0x38) << 4) | pkt[2];
 835         dev->y = ((pkt[1] & 0x07) << 7) | pkt[3];
 836         dev->touch = pkt[0] & 0x01;
 837
 838         return 1;
 839 }
 840 #endif
 841
 842 /*****************************************************************************
 843  * JASTEC Part
 844  */
 845 #ifdef CONFIG_TOUCHSCREEN_USB_JASTEC
 846 static int jastec_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 847 {
 848         dev->x = ((pkt[0] & 0x3f) << 6) | (pkt[2] & 0x3f);
 849         dev->y = ((pkt[1] & 0x3f) << 6) | (pkt[3] & 0x3f);
 850         dev->touch = (pkt[0] & 0x40) >> 6;
 851
 852         return 1;
 853 }
 854 #endif
 855
 856 /*****************************************************************************
 857  * Zytronic Part
 858  */
 859 #ifdef CONFIG_TOUCHSCREEN_USB_ZYTRONIC
 860 static int zytronic_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 861 {
 862         struct usb_interface *intf = dev->interface;
 863
 864         switch (pkt[0]) {
 865         case 0x3A: /* command response */
 866                 dev_dbg(&intf->dev, "%s: Command response %d\n", __func__, pkt[1]);
 867                 break;
 868
 869         case 0xC0: /* down */
 870                 dev->x = (pkt[1] & 0x7f) | ((pkt[2] & 0x07) << 7);
 871                 dev->y = (pkt[3] & 0x7f) | ((pkt[4] & 0x07) << 7);
 872                 dev->touch = 1;
 873                 dev_dbg(&intf->dev, "%s: down %d,%d\n", __func__, dev->x, dev->y);
 874                 return 1;
 875
 876         case 0x80: /* up */
 877                 dev->x = (pkt[1] & 0x7f) | ((pkt[2] & 0x07) << 7);
 878                 dev->y = (pkt[3] & 0x7f) | ((pkt[4] & 0x07) << 7);
 879                 dev->touch = 0;
 880                 dev_dbg(&intf->dev, "%s: up %d,%d\n", __func__, dev->x, dev->y);
 881                 return 1;
 882
 883         default:
 884                 dev_dbg(&intf->dev, "%s: Unknown return %d\n", __func__, pkt[0]);
 885                 break;
 886         }
 887
 888         return 0;
 889 }
 890 #endif
 891
 892 /*****************************************************************************
 893  * NEXIO Part
 894  */
 895 #ifdef CONFIG_TOUCHSCREEN_USB_NEXIO
 896
 897 #define NEXIO_TIMEOUT   5000
 898 #define NEXIO_BUFSIZE   1024
 899 #define NEXIO_THRESHOLD 50
 900
 901 struct nexio_priv {
 902         struct urb *ack;
 903         unsigned char *ack_buf;
 904 };
 905
 906 struct nexio_touch_packet {
 907         u8      flags;          /* 0xe1 = touch, 0xe1 = release */
 908         __be16  data_len;       /* total bytes of touch data */
 909         __be16  x_len;          /* bytes for X axis */
 910         __be16  y_len;          /* bytes for Y axis */
 911         u8      data[];
 912 } __attribute__ ((packed));
 913
 914 static unsigned char nexio_ack_pkt[2] = { 0xaa, 0x02 };
 915 static unsigned char nexio_init_pkt[4] = { 0x82, 0x04, 0x0a, 0x0f };
 916
 917 static void nexio_ack_complete(struct urb *urb)
 918 {
 919 }
 920
 921 static int nexio_alloc(struct usbtouch_usb *usbtouch)
 922 {
 923         struct nexio_priv *priv;
 924         int ret = -ENOMEM;
 925
 926         usbtouch->priv = kmalloc(sizeof(struct nexio_priv), GFP_KERNEL);
 927         if (!usbtouch->priv)
 928                 goto out_buf;
 929
 930         priv = usbtouch->priv;
 931
 932         priv->ack_buf = kmemdup(nexio_ack_pkt, sizeof(nexio_ack_pkt),
 933                                 GFP_KERNEL);
 934         if (!priv->ack_buf)
 935                 goto err_priv;
 936
 937         priv->ack = usb_alloc_urb(0, GFP_KERNEL);
 938         if (!priv->ack) {
 939                 dev_dbg(&usbtouch->interface->dev,
 940                         "%s - usb_alloc_urb failed: usbtouch->ack\n", __func__);
 941                 goto err_ack_buf;
 942         }
 943
 944         return 0;
 945
 946 err_ack_buf:
 947         kfree(priv->ack_buf);
 948 err_priv:
 949         kfree(priv);
 950 out_buf:
 951         return ret;
 952 }
 953
 954 static int nexio_init(struct usbtouch_usb *usbtouch)
 955 {
 956         struct usb_device *dev = interface_to_usbdev(usbtouch->interface);
 957         struct usb_host_interface *interface = usbtouch->interface->cur_altsetting;
 958         struct nexio_priv *priv = usbtouch->priv;
 959         int ret = -ENOMEM;
 960         int actual_len, i;
 961         unsigned char *buf;
 962         char *firmware_ver = NULL, *device_name = NULL;
 963         int input_ep = 0, output_ep = 0;
 964
 965         /* find first input and output endpoint */
 966         for (i = 0; i < interface->desc.bNumEndpoints; i++) {
 967                 if (!input_ep &&
 968                     usb_endpoint_dir_in(&interface->endpoint[i].desc))
 969                         input_ep = interface->endpoint[i].desc.bEndpointAddress;
 970                 if (!output_ep &&
 971                     usb_endpoint_dir_out(&interface->endpoint[i].desc))
 972                         output_ep = interface->endpoint[i].desc.bEndpointAddress;
 973         }
 974         if (!input_ep || !output_ep)
 975                 return -ENXIO;
 976
 977         buf = kmalloc(NEXIO_BUFSIZE, GFP_NOIO);
 978         if (!buf)
 979                 goto out_buf;
 980
 981         /* two empty reads */
 982         for (i = 0; i < 2; i++) {
 983                 ret = usb_bulk_msg(dev, usb_rcvbulkpipe(dev, input_ep),
 984                                    buf, NEXIO_BUFSIZE, &actual_len,
 985                                    NEXIO_TIMEOUT);
 986                 if (ret < 0)
 987                         goto out_buf;
 988         }
 989
 990         /* send init command */
 991         memcpy(buf, nexio_init_pkt, sizeof(nexio_init_pkt));
 992         ret = usb_bulk_msg(dev, usb_sndbulkpipe(dev, output_ep),
 993                            buf, sizeof(nexio_init_pkt), &actual_len,
 994                            NEXIO_TIMEOUT);
 995         if (ret < 0)
 996                 goto out_buf;
 997
 998         /* read replies */
 999         for (i = 0; i < 3; i++) {
1000                 memset(buf, 0, NEXIO_BUFSIZE);
1001                 ret = usb_bulk_msg(dev, usb_rcvbulkpipe(dev, input_ep),
1002                                    buf, NEXIO_BUFSIZE, &actual_len,
1003                                    NEXIO_TIMEOUT);
1004                 if (ret < 0 || actual_len < 1 || buf[1] != actual_len)
1005                         continue;
1006                 switch (buf[0]) {
1007                 case 0x83:      /* firmware version */
1008                         if (!firmware_ver)
1009                                 firmware_ver = kstrdup(&buf[2], GFP_NOIO);
1010                         break;
1011                 case 0x84:      /* device name */
1012                         if (!device_name)
1013                                 device_name = kstrdup(&buf[2], GFP_NOIO);
1014                         break;
1015                 }
1016         }
1017
1018         printk(KERN_INFO "Nexio device: %s, firmware version: %s\n",
1019                device_name, firmware_ver);
1020
1021         kfree(firmware_ver);
1022         kfree(device_name);
1023
1024         usb_fill_bulk_urb(priv->ack, dev, usb_sndbulkpipe(dev, output_ep),
1025                           priv->ack_buf, sizeof(nexio_ack_pkt),
1026                           nexio_ack_complete, usbtouch);
1027         ret = 0;
1028
1029 out_buf:
1030         kfree(buf);
1031         return ret;
1032 }
1033
1034 static void nexio_exit(struct usbtouch_usb *usbtouch)
1035 {
1036         struct nexio_priv *priv = usbtouch->priv;
1037
1038         usb_kill_urb(priv->ack);
1039         usb_free_urb(priv->ack);
1040         kfree(priv->ack_buf);
1041         kfree(priv);
1042 }
1043
1044 static int nexio_read_data(struct usbtouch_usb *usbtouch, unsigned char *pkt)
1045 {
1046         struct nexio_touch_packet *packet = (void *) pkt;
1047         struct nexio_priv *priv = usbtouch->priv;
1048         unsigned int data_len = be16_to_cpu(packet->data_len);
1049         unsigned int x_len = be16_to_cpu(packet->x_len);
1050         unsigned int y_len = be16_to_cpu(packet->y_len);
1051         int x, y, begin_x, begin_y, end_x, end_y, w, h, ret;
1052
1053         /* got touch data? */
1054         if ((pkt[0] & 0xe0) != 0xe0)
1055                 return 0;
1056
1057         if (data_len > 0xff)
1058                 data_len -= 0x100;
1059         if (x_len > 0xff)
1060                 x_len -= 0x80;
1061
1062         /* send ACK */
1063         ret = usb_submit_urb(priv->ack, GFP_ATOMIC);
1064
1065         if (!usbtouch->type->max_xc) {
1066                 usbtouch->type->max_xc = 2 * x_len;
1067                 input_set_abs_params(usbtouch->input, ABS_X,
1068                                      0, usbtouch->type->max_xc, 0, 0);
1069                 usbtouch->type->max_yc = 2 * y_len;
1070                 input_set_abs_params(usbtouch->input, ABS_Y,
1071                                      0, usbtouch->type->max_yc, 0, 0);
1072         }
1073         /*
1074          * The device reports state of IR sensors on X and Y axes.
1075          * Each byte represents "darkness" percentage (0-100) of one element.
1076          * 17" touchscreen reports only 64 x 52 bytes so the resolution is low.
1077          * This also means that there's a limited multi-touch capability but
1078          * it's disabled (and untested) here as there's no X driver for that.
1079          */
1080         begin_x = end_x = begin_y = end_y = -1;
1081         for (x = 0; x < x_len; x++) {
1082                 if (begin_x == -1 && packet->data[x] > NEXIO_THRESHOLD) {
1083                         begin_x = x;
1084                         continue;
1085                 }
1086                 if (end_x == -1 && begin_x != -1 && packet->data[x] < NEXIO_THRESHOLD) {
1087                         end_x = x - 1;
1088                         for (y = x_len; y < data_len; y++) {
1089                                 if (begin_y == -1 && packet->data[y] > NEXIO_THRESHOLD) {
1090                                         begin_y = y - x_len;
1091                                         continue;
1092                                 }
1093                                 if (end_y == -1 &&
1094                                     begin_y != -1 && packet->data[y] < NEXIO_THRESHOLD) {
1095                                         end_y = y - 1 - x_len;
1096                                         w = end_x - begin_x;
1097                                         h = end_y - begin_y;
1098 #if 0
1099                                         /* multi-touch */
1100                                         input_report_abs(usbtouch->input,
1101                                                     ABS_MT_TOUCH_MAJOR, max(w,h));
1102                                         input_report_abs(usbtouch->input,
1103                                                     ABS_MT_TOUCH_MINOR, min(x,h));
1104                                         input_report_abs(usbtouch->input,
1105                                                     ABS_MT_POSITION_X, 2*begin_x+w);
1106                                         input_report_abs(usbtouch->input,
1107                                                     ABS_MT_POSITION_Y, 2*begin_y+h);
1108                                         input_report_abs(usbtouch->input,
1109                                                     ABS_MT_ORIENTATION, w > h);
1110                                         input_mt_sync(usbtouch->input);
1111 #endif
1112                                         /* single touch */
1113                                         usbtouch->x = 2 * begin_x + w;
1114                                         usbtouch->y = 2 * begin_y + h;
1115                                         usbtouch->touch = packet->flags & 0x01;
1116                                         begin_y = end_y = -1;
1117                                         return 1;
1118                                 }
1119                         }
1120                         begin_x = end_x = -1;
1121                 }
1122
1123         }
1124         return 0;
1125 }
1126 #endif
1127
1128
1129 /*****************************************************************************
1130  * ELO part
1131  */
1132
1133 #ifdef CONFIG_TOUCHSCREEN_USB_ELO
1134
1135 static int elo_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
1136 {
1137         dev->x = (pkt[3] << 8) | pkt[2];
1138         dev->y = (pkt[5] << 8) | pkt[4];
1139         dev->touch = pkt[6] > 0;
1140         dev->press = pkt[6];
1141
1142         return 1;
1143 }
1144 #endif
1145
1146
1147 /*****************************************************************************
1148  * the different device descriptors
1149  */
1150 #ifdef MULTI_PACKET
1151 static void usbtouch_process_multi(struct usbtouch_usb *usbtouch,
1152                                    unsigned char *pkt, int len);
1153 #endif
1154
1155 static struct usbtouch_device_info usbtouch_dev_info[] = {
1156 #ifdef CONFIG_TOUCHSCREEN_USB_ELO
1157         [DEVTYPE_ELO] = {
1158                 .min_xc         = 0x0,
1159                 .max_xc         = 0x0fff,
1160                 .min_yc         = 0x0,
1161                 .max_yc         = 0x0fff,
1162                 .max_press      = 0xff,
1163                 .rept_size      = 8,
1164                 .read_data      = elo_read_data,
1165         },
1166 #endif
1167
1168 #ifdef CONFIG_TOUCHSCREEN_USB_EGALAX
1169         [DEVTYPE_EGALAX] = {
1170                 .min_xc         = 0x0,
1171                 .max_xc         = 0x07ff,
1172                 .min_yc         = 0x0,
1173                 .max_yc         = 0x07ff,
1174                 .rept_size      = 16,
1175                 .process_pkt    = usbtouch_process_multi,
1176                 .get_pkt_len    = egalax_get_pkt_len,
1177                 .read_data      = egalax_read_data,
1178                 .init           = egalax_init,
1179         },
1180 #endif
1181
1182 #ifdef CONFIG_TOUCHSCREEN_USB_PANJIT
1183         [DEVTYPE_PANJIT] = {
1184                 .min_xc         = 0x0,
1185                 .max_xc         = 0x0fff,
1186                 .min_yc         = 0x0,
1187                 .max_yc         = 0x0fff,
1188                 .rept_size      = 8,
1189                 .read_data      = panjit_read_data,
1190         },
1191 #endif
1192
1193 #ifdef CONFIG_TOUCHSCREEN_USB_3M
1194         [DEVTYPE_3M] = {
1195                 .min_xc         = 0x0,
1196                 .max_xc         = 0x4000,
1197                 .min_yc         = 0x0,
1198                 .max_yc         = 0x4000,
1199                 .rept_size      = 11,
1200                 .read_data      = mtouch_read_data,
1201                 .alloc          = mtouch_alloc,
1202                 .init           = mtouch_init,
1203                 .exit           = mtouch_exit,
1204         },
1205 #endif
1206
1207 #ifdef CONFIG_TOUCHSCREEN_USB_ITM
1208         [DEVTYPE_ITM] = {
1209                 .min_xc         = 0x0,
1210                 .max_xc         = 0x0fff,
1211                 .min_yc         = 0x0,
1212                 .max_yc         = 0x0fff,
1213                 .max_press      = 0xff,
1214                 .rept_size      = 8,
1215                 .read_data      = itm_read_data,
1216         },
1217 #endif
1218
1219 #ifdef CONFIG_TOUCHSCREEN_USB_ETURBO
1220         [DEVTYPE_ETURBO] = {
1221                 .min_xc         = 0x0,
1222                 .max_xc         = 0x07ff,
1223                 .min_yc         = 0x0,
1224                 .max_yc         = 0x07ff,
1225                 .rept_size      = 8,
1226                 .process_pkt    = usbtouch_process_multi,
1227                 .get_pkt_len    = eturbo_get_pkt_len,
1228                 .read_data      = eturbo_read_data,
1229         },
1230 #endif
1231
1232 #ifdef CONFIG_TOUCHSCREEN_USB_GUNZE
1233         [DEVTYPE_GUNZE] = {
1234                 .min_xc         = 0x0,
1235                 .max_xc         = 0x0fff,
1236                 .min_yc         = 0x0,
1237                 .max_yc         = 0x0fff,
1238                 .rept_size      = 4,
1239                 .read_data      = gunze_read_data,
1240         },
1241 #endif
1242
1243 #ifdef CONFIG_TOUCHSCREEN_USB_DMC_TSC10
1244         [DEVTYPE_DMC_TSC10] = {
1245                 .min_xc         = 0x0,
1246                 .max_xc         = 0x03ff,
1247                 .min_yc         = 0x0,
1248                 .max_yc         = 0x03ff,
1249                 .rept_size      = 5,
1250                 .init           = dmc_tsc10_init,
1251                 .read_data      = dmc_tsc10_read_data,
1252         },
1253 #endif
1254
1255 #ifdef CONFIG_TOUCHSCREEN_USB_IRTOUCH
1256         [DEVTYPE_IRTOUCH] = {
1257                 .min_xc         = 0x0,
1258                 .max_xc         = 0x0fff,
1259                 .min_yc         = 0x0,
1260                 .max_yc         = 0x0fff,
1261                 .rept_size      = 8,
1262                 .read_data      = irtouch_read_data,
1263         },
1264
1265         [DEVTYPE_IRTOUCH_HIRES] = {
1266                 .min_xc         = 0x0,
1267                 .max_xc         = 0x7fff,
1268                 .min_yc         = 0x0,
1269                 .max_yc         = 0x7fff,
1270                 .rept_size      = 8,
1271                 .read_data      = irtouch_read_data,
1272         },
1273 #endif
1274
1275 #ifdef CONFIG_TOUCHSCREEN_USB_IDEALTEK
1276         [DEVTYPE_IDEALTEK] = {
1277                 .min_xc         = 0x0,
1278                 .max_xc         = 0x0fff,
1279                 .min_yc         = 0x0,
1280                 .max_yc         = 0x0fff,
1281                 .rept_size      = 8,
1282                 .process_pkt    = usbtouch_process_multi,
1283                 .get_pkt_len    = idealtek_get_pkt_len,
1284                 .read_data      = idealtek_read_data,
1285         },
1286 #endif
1287
1288 #ifdef CONFIG_TOUCHSCREEN_USB_GENERAL_TOUCH
1289         [DEVTYPE_GENERAL_TOUCH] = {
1290                 .min_xc         = 0x0,
1291                 .max_xc         = 0x7fff,
1292                 .min_yc         = 0x0,
1293                 .max_yc         = 0x7fff,
1294                 .rept_size      = 7,
1295                 .read_data      = general_touch_read_data,
1296         },
1297 #endif
1298
1299 #ifdef CONFIG_TOUCHSCREEN_USB_GOTOP
1300         [DEVTYPE_GOTOP] = {
1301                 .min_xc         = 0x0,
1302                 .max_xc         = 0x03ff,
1303                 .min_yc         = 0x0,
1304                 .max_yc         = 0x03ff,
1305                 .rept_size      = 4,
1306                 .read_data      = gotop_read_data,
1307         },
1308 #endif
1309
1310 #ifdef CONFIG_TOUCHSCREEN_USB_JASTEC
1311         [DEVTYPE_JASTEC] = {
1312                 .min_xc         = 0x0,
1313                 .max_xc         = 0x0fff,
1314                 .min_yc         = 0x0,
1315                 .max_yc         = 0x0fff,
1316                 .rept_size      = 4,
1317                 .read_data      = jastec_read_data,
1318         },
1319 #endif
1320
1321 #ifdef CONFIG_TOUCHSCREEN_USB_E2I
1322         [DEVTYPE_E2I] = {
1323                 .min_xc         = 0x0,
1324                 .max_xc         = 0x7fff,
1325                 .min_yc         = 0x0,
1326                 .max_yc         = 0x7fff,
1327                 .rept_size      = 6,
1328                 .init           = e2i_init,
1329                 .read_data      = e2i_read_data,
1330         },
1331 #endif
1332
1333 #ifdef CONFIG_TOUCHSCREEN_USB_ZYTRONIC
1334         [DEVTYPE_ZYTRONIC] = {
1335                 .min_xc         = 0x0,
1336                 .max_xc         = 0x03ff,
1337                 .min_yc         = 0x0,
1338                 .max_yc         = 0x03ff,
1339                 .rept_size      = 5,
1340                 .read_data      = zytronic_read_data,
1341                 .irq_always     = true,
1342         },
1343 #endif
1344
1345 #ifdef CONFIG_TOUCHSCREEN_USB_ETT_TC45USB
1346         [DEVTYPE_TC45USB] = {
1347                 .min_xc         = 0x0,
1348                 .max_xc         = 0x0fff,
1349                 .min_yc         = 0x0,
1350                 .max_yc         = 0x0fff,
1351                 .rept_size      = 5,
1352                 .read_data      = tc45usb_read_data,
1353         },
1354 #endif
1355
1356 #ifdef CONFIG_TOUCHSCREEN_USB_NEXIO
1357         [DEVTYPE_NEXIO] = {
1358                 .rept_size      = 1024,
1359                 .irq_always     = true,
1360                 .read_data      = nexio_read_data,
1361                 .alloc          = nexio_alloc,
1362                 .init           = nexio_init,
1363                 .exit           = nexio_exit,
1364         },
1365 #endif
1366 #ifdef CONFIG_TOUCHSCREEN_USB_EASYTOUCH
1367         [DEVTYPE_ETOUCH] = {
1368                 .min_xc         = 0x0,
1369                 .max_xc         = 0x07ff,
1370                 .min_yc         = 0x0,
1371                 .max_yc         = 0x07ff,
1372                 .rept_size      = 16,
1373                 .process_pkt    = usbtouch_process_multi,
1374                 .get_pkt_len    = etouch_get_pkt_len,
1375                 .read_data      = etouch_read_data,
1376         },
1377 #endif
1378 };
1379
1380
1381 /*****************************************************************************
1382  * Generic Part
1383  */
1384 static void usbtouch_process_pkt(struct usbtouch_usb *usbtouch,
1385                                  unsigned char *pkt, int len)
1386 {
1387         struct usbtouch_device_info *type = usbtouch->type;
1388
1389         if (!type->read_data(usbtouch, pkt))
1390                         return;
1391
1392         input_report_key(usbtouch->input, BTN_TOUCH, usbtouch->touch);
1393
1394         if (swap_xy) {
1395                 input_report_abs(usbtouch->input, ABS_X, usbtouch->y);
1396                 input_report_abs(usbtouch->input, ABS_Y, usbtouch->x);
1397         } else {
1398                 input_report_abs(usbtouch->input, ABS_X, usbtouch->x);
1399                 input_report_abs(usbtouch->input, ABS_Y, usbtouch->y);
1400         }
1401         if (type->max_press)
1402                 input_report_abs(usbtouch->input, ABS_PRESSURE, usbtouch->press);
1403         input_sync(usbtouch->input);
1404 }
1405
1406
1407 #ifdef MULTI_PACKET
1408 static void usbtouch_process_multi(struct usbtouch_usb *usbtouch,
1409                                    unsigned char *pkt, int len)
1410 {
1411         unsigned char *buffer;
1412         int pkt_len, pos, buf_len, tmp;
1413
1414         /* process buffer */
1415         if (unlikely(usbtouch->buf_len)) {
1416                 /* try to get size */
1417                 pkt_len = usbtouch->type->get_pkt_len(
1418                                 usbtouch->buffer, usbtouch->buf_len);
1419
1420                 /* drop? */
1421                 if (unlikely(!pkt_len))
1422                         goto out_flush_buf;
1423
1424                 /* need to append -pkt_len bytes before able to get size */
1425                 if (unlikely(pkt_len < 0)) {
1426                         int append = -pkt_len;
1427                         if (unlikely(append > len))
1428                                append = len;
1429                         if (usbtouch->buf_len + append >= usbtouch->type->rept_size)
1430                                 goto out_flush_buf;
1431                         memcpy(usbtouch->buffer + usbtouch->buf_len, pkt, append);
1432                         usbtouch->buf_len += append;
1433
1434                         pkt_len = usbtouch->type->get_pkt_len(
1435                                         usbtouch->buffer, usbtouch->buf_len);
1436                         if (pkt_len < 0)
1437                                 return;
1438                 }
1439
1440                 /* append */
1441                 tmp = pkt_len - usbtouch->buf_len;
1442                 if (usbtouch->buf_len + tmp >= usbtouch->type->rept_size)
1443                         goto out_flush_buf;
1444                 memcpy(usbtouch->buffer + usbtouch->buf_len, pkt, tmp);
1445                 usbtouch_process_pkt(usbtouch, usbtouch->buffer, pkt_len);
1446
1447                 buffer = pkt + tmp;
1448                 buf_len = len - tmp;
1449         } else {
1450                 buffer = pkt;
1451                 buf_len = len;
1452         }
1453
1454         /* loop over the received packet, process */
1455         pos = 0;
1456         while (pos < buf_len) {
1457                 /* get packet len */
1458                 pkt_len = usbtouch->type->get_pkt_len(buffer + pos,
1459                                                         buf_len - pos);
1460
1461                 /* unknown packet: skip one byte */
1462                 if (unlikely(!pkt_len)) {
1463                         pos++;
1464                         continue;
1465                 }
1466
1467                 /* full packet: process */
1468                 if (likely((pkt_len > 0) && (pkt_len <= buf_len - pos))) {
1469                         usbtouch_process_pkt(usbtouch, buffer + pos, pkt_len);
1470                 } else {
1471                         /* incomplete packet: save in buffer */
1472                         memcpy(usbtouch->buffer, buffer + pos, buf_len - pos);
1473                         usbtouch->buf_len = buf_len - pos;
1474                         return;
1475                 }
1476                 pos += pkt_len;
1477         }
1478
1479 out_flush_buf:
1480         usbtouch->buf_len = 0;
1481         return;
1482 }
1483 #endif
1484
1485
1486 static void usbtouch_irq(struct urb *urb)
1487 {
1488         struct usbtouch_usb *usbtouch = urb->context;
1489         struct device *dev = &usbtouch->interface->dev;
1490         int retval;
1491
1492         switch (urb->status) {
1493         case 0:
1494                 /* success */
1495                 break;
1496         case -ETIME:
1497                 /* this urb is timing out */
1498                 dev_dbg(dev,
1499                         "%s - urb timed out - was the device unplugged?\n",
1500                         __func__);
1501                 return;
1502         case -ECONNRESET:
1503         case -ENOENT:
1504         case -ESHUTDOWN:
1505         case -EPIPE:
1506                 /* this urb is terminated, clean up */
1507                 dev_dbg(dev, "%s - urb shutting down with status: %d\n",
1508                         __func__, urb->status);
1509                 return;
1510         default:
1511                 dev_dbg(dev, "%s - nonzero urb status received: %d\n",
1512                         __func__, urb->status);
1513                 goto exit;
1514         }
1515
1516         usbtouch->type->process_pkt(usbtouch, usbtouch->data, urb->actual_length);
1517
1518 exit:
1519         usb_mark_last_busy(interface_to_usbdev(usbtouch->interface));
1520         retval = usb_submit_urb(urb, GFP_ATOMIC);
1521         if (retval)
1522                 dev_err(dev, "%s - usb_submit_urb failed with result: %d\n",
1523                         __func__, retval);
1524 }
1525
1526 static int usbtouch_open(struct input_dev *input)
1527 {
1528         struct usbtouch_usb *usbtouch = input_get_drvdata(input);
1529         int r;
1530
1531         usbtouch->irq->dev = interface_to_usbdev(usbtouch->interface);
1532
1533         r = usb_autopm_get_interface(usbtouch->interface) ? -EIO : 0;
1534         if (r < 0)
1535                 goto out;
1536
1537         mutex_lock(&usbtouch->pm_mutex);
1538         if (!usbtouch->type->irq_always) {
1539                 if (usb_submit_urb(usbtouch->irq, GFP_KERNEL)) {
1540                         r = -EIO;
1541                         goto out_put;
1542                 }
1543         }
1544
1545         usbtouch->interface->needs_remote_wakeup = 1;
1546         usbtouch->is_open = true;
1547 out_put:
1548         mutex_unlock(&usbtouch->pm_mutex);
1549         usb_autopm_put_interface(usbtouch->interface);
1550 out:
1551         return r;
1552 }
1553
1554 static void usbtouch_close(struct input_dev *input)
1555 {
1556         struct usbtouch_usb *usbtouch = input_get_drvdata(input);
1557         int r;
1558
1559         mutex_lock(&usbtouch->pm_mutex);
1560         if (!usbtouch->type->irq_always)
1561                 usb_kill_urb(usbtouch->irq);
1562         usbtouch->is_open = false;
1563         mutex_unlock(&usbtouch->pm_mutex);
1564
1565         r = usb_autopm_get_interface(usbtouch->interface);
1566         usbtouch->interface->needs_remote_wakeup = 0;
1567         if (!r)
1568                 usb_autopm_put_interface(usbtouch->interface);
1569 }
1570
1571 static int usbtouch_suspend
1572 (struct usb_interface *intf, pm_message_t message)
1573 {
1574         struct usbtouch_usb *usbtouch = usb_get_intfdata(intf);
1575
1576         usb_kill_urb(usbtouch->irq);
1577
1578         return 0;
1579 }
1580
1581 static int usbtouch_resume(struct usb_interface *intf)
1582 {
1583         struct usbtouch_usb *usbtouch = usb_get_intfdata(intf);
1584         int result = 0;
1585
1586         mutex_lock(&usbtouch->pm_mutex);
1587         if (usbtouch->is_open || usbtouch->type->irq_always)
1588                 result = usb_submit_urb(usbtouch->irq, GFP_NOIO);
1589         mutex_unlock(&usbtouch->pm_mutex);
1590
1591         return result;
1592 }
1593
1594 static int usbtouch_reset_resume(struct usb_interface *intf)
1595 {
1596         struct usbtouch_usb *usbtouch = usb_get_intfdata(intf);
1597         int err = 0;
1598
1599         /* reinit the device */
1600         if (usbtouch->type->init) {
1601                 err = usbtouch->type->init(usbtouch);
1602                 if (err) {
1603                         dev_dbg(&intf->dev,
1604                                 "%s - type->init() failed, err: %d\n",
1605                                 __func__, err);
1606                         return err;
1607                 }
1608         }
1609
1610         /* restart IO if needed */
1611         mutex_lock(&usbtouch->pm_mutex);
1612         if (usbtouch->is_open)
1613                 err = usb_submit_urb(usbtouch->irq, GFP_NOIO);
1614         mutex_unlock(&usbtouch->pm_mutex);
1615
1616         return err;
1617 }
1618
1619 static void usbtouch_free_buffers(struct usb_device *udev,
1620                                   struct usbtouch_usb *usbtouch)
1621 {
1622         usb_free_coherent(udev, usbtouch->data_size,
1623                           usbtouch->data, usbtouch->data_dma);
1624         kfree(usbtouch->buffer);
1625 }
1626
1627 static struct usb_endpoint_descriptor *
1628 usbtouch_get_input_endpoint(struct usb_host_interface *interface)
1629 {
1630         int i;
1631
1632         for (i = 0; i < interface->desc.bNumEndpoints; i++)
1633                 if (usb_endpoint_dir_in(&interface->endpoint[i].desc))
1634                         return &interface->endpoint[i].desc;
1635
1636         return NULL;
1637 }
1638
1639 static int usbtouch_probe(struct usb_interface *intf,
1640                           const struct usb_device_id *id)
1641 {
1642         struct usbtouch_usb *usbtouch;
1643         struct input_dev *input_dev;
1644         struct usb_endpoint_descriptor *endpoint;
1645         struct usb_device *udev = interface_to_usbdev(intf);
1646         struct usbtouch_device_info *type;
1647         int err = -ENOMEM;
1648
1649         /* some devices are ignored */
1650         if (id->driver_info == DEVTYPE_IGNORE)
1651                 return -ENODEV;
1652
1653         endpoint = usbtouch_get_input_endpoint(intf->cur_altsetting);
1654         if (!endpoint)
1655                 return -ENXIO;
1656
1657         usbtouch = kzalloc(sizeof(struct usbtouch_usb), GFP_KERNEL);
1658         input_dev = input_allocate_device();
1659         if (!usbtouch || !input_dev)
1660                 goto out_free;
1661
1662         mutex_init(&usbtouch->pm_mutex);
1663
1664         type = &usbtouch_dev_info[id->driver_info];
1665         usbtouch->type = type;
1666         if (!type->process_pkt)
1667                 type->process_pkt = usbtouch_process_pkt;
1668
1669         usbtouch->data_size = type->rept_size;
1670         if (type->get_pkt_len) {
1671                 /*
1672                  * When dealing with variable-length packets we should
1673                  * not request more than wMaxPacketSize bytes at once
1674                  * as we do not know if there is more data coming or
1675                  * we filled exactly wMaxPacketSize bytes and there is
1676                  * nothing else.
1677                  */
1678                 usbtouch->data_size = min(usbtouch->data_size,
1679                                           usb_endpoint_maxp(endpoint));
1680         }
1681
1682         usbtouch->data = usb_alloc_coherent(udev, usbtouch->data_size,
1683                                             GFP_KERNEL, &usbtouch->data_dma);
1684         if (!usbtouch->data)
1685                 goto out_free;
1686
1687         if (type->get_pkt_len) {
1688                 usbtouch->buffer = kmalloc(type->rept_size, GFP_KERNEL);
1689                 if (!usbtouch->buffer)
1690                         goto out_free_buffers;
1691         }
1692
1693         usbtouch->irq = usb_alloc_urb(0, GFP_KERNEL);
1694         if (!usbtouch->irq) {
1695                 dev_dbg(&intf->dev,
1696                         "%s - usb_alloc_urb failed: usbtouch->irq\n", __func__);
1697                 goto out_free_buffers;
1698         }
1699
1700         usbtouch->interface = intf;
1701         usbtouch->input = input_dev;
1702
1703         if (udev->manufacturer)
1704                 strlcpy(usbtouch->name, udev->manufacturer, sizeof(usbtouch->name));
1705
1706         if (udev->product) {
1707                 if (udev->manufacturer)
1708                         strlcat(usbtouch->name, " ", sizeof(usbtouch->name));
1709                 strlcat(usbtouch->name, udev->product, sizeof(usbtouch->name));
1710         }
1711
1712         if (!strlen(usbtouch->name))
1713                 snprintf(usbtouch->name, sizeof(usbtouch->name),
1714                         "USB Touchscreen %04x:%04x",
1715                          le16_to_cpu(udev->descriptor.idVendor),
1716                          le16_to_cpu(udev->descriptor.idProduct));
1717
1718         usb_make_path(udev, usbtouch->phys, sizeof(usbtouch->phys));
1719         strlcat(usbtouch->phys, "/input0", sizeof(usbtouch->phys));
1720
1721         input_dev->name = usbtouch->name;
1722         input_dev->phys = usbtouch->phys;
1723         usb_to_input_id(udev, &input_dev->id);
1724         input_dev->dev.parent = &intf->dev;
1725
1726         input_set_drvdata(input_dev, usbtouch);
1727
1728         input_dev->open = usbtouch_open;
1729         input_dev->close = usbtouch_close;
1730
1731         input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
1732         input_dev->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH);
1733         input_set_abs_params(input_dev, ABS_X, type->min_xc, type->max_xc, 0, 0);
1734         input_set_abs_params(input_dev, ABS_Y, type->min_yc, type->max_yc, 0, 0);
1735         if (type->max_press)
1736                 input_set_abs_params(input_dev, ABS_PRESSURE, type->min_press,
1737                                      type->max_press, 0, 0);
1738
1739         if (usb_endpoint_type(endpoint) == USB_ENDPOINT_XFER_INT)
1740                 usb_fill_int_urb(usbtouch->irq, udev,
1741                          usb_rcvintpipe(udev, endpoint->bEndpointAddress),
1742                          usbtouch->data, usbtouch->data_size,
1743                          usbtouch_irq, usbtouch, endpoint->bInterval);
1744         else
1745                 usb_fill_bulk_urb(usbtouch->irq, udev,
1746                          usb_rcvbulkpipe(udev, endpoint->bEndpointAddress),
1747                          usbtouch->data, usbtouch->data_size,
1748                          usbtouch_irq, usbtouch);
1749
1750         usbtouch->irq->dev = udev;
1751         usbtouch->irq->transfer_dma = usbtouch->data_dma;
1752         usbtouch->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1753
1754         /* device specific allocations */
1755         if (type->alloc) {
1756                 err = type->alloc(usbtouch);
1757                 if (err) {
1758                         dev_dbg(&intf->dev,
1759                                 "%s - type->alloc() failed, err: %d\n",
1760                                 __func__, err);
1761                         goto out_free_urb;
1762                 }
1763         }
1764
1765         /* device specific initialisation*/
1766         if (type->init) {
1767                 err = type->init(usbtouch);
1768                 if (err) {
1769                         dev_dbg(&intf->dev,
1770                                 "%s - type->init() failed, err: %d\n",
1771                                 __func__, err);
1772                         goto out_do_exit;
1773                 }
1774         }
1775
1776         err = input_register_device(usbtouch->input);
1777         if (err) {
1778                 dev_dbg(&intf->dev,
1779                         "%s - input_register_device failed, err: %d\n",
1780                         __func__, err);
1781                 goto out_do_exit;
1782         }
1783
1784         usb_set_intfdata(intf, usbtouch);
1785
1786         if (usbtouch->type->irq_always) {
1787                 /* this can't fail */
1788                 usb_autopm_get_interface(intf);
1789                 err = usb_submit_urb(usbtouch->irq, GFP_KERNEL);
1790                 if (err) {
1791                         usb_autopm_put_interface(intf);
1792                         dev_err(&intf->dev,
1793                                 "%s - usb_submit_urb failed with result: %d\n",
1794                                 __func__, err);
1795                         goto out_unregister_input;
1796                 }
1797         }
1798
1799         return 0;
1800
1801 out_unregister_input:
1802         input_unregister_device(input_dev);
1803         input_dev = NULL;
1804 out_do_exit:
1805         if (type->exit)
1806                 type->exit(usbtouch);
1807 out_free_urb:
1808         usb_free_urb(usbtouch->irq);
1809 out_free_buffers:
1810         usbtouch_free_buffers(udev, usbtouch);
1811 out_free:
1812         input_free_device(input_dev);
1813         kfree(usbtouch);
1814         return err;
1815 }
1816
1817 static void usbtouch_disconnect(struct usb_interface *intf)
1818 {
1819         struct usbtouch_usb *usbtouch = usb_get_intfdata(intf);
1820
1821         if (!usbtouch)
1822                 return;
1823
1824         dev_dbg(&intf->dev,
1825                 "%s - usbtouch is initialized, cleaning up\n", __func__);
1826
1827         usb_set_intfdata(intf, NULL);
1828         /* this will stop IO via close */
1829         input_unregister_device(usbtouch->input);
1830         usb_free_urb(usbtouch->irq);
1831         if (usbtouch->type->exit)
1832                 usbtouch->type->exit(usbtouch);
1833         usbtouch_free_buffers(interface_to_usbdev(intf), usbtouch);
1834         kfree(usbtouch);
1835 }
1836
1837 MODULE_DEVICE_TABLE(usb, usbtouch_devices);
1838
1839 static struct usb_driver usbtouch_driver = {
1840         .name           = "usbtouchscreen",
1841         .probe          = usbtouch_probe,
1842         .disconnect     = usbtouch_disconnect,
1843         .suspend        = usbtouch_suspend,
1844         .resume         = usbtouch_resume,
1845         .reset_resume   = usbtouch_reset_resume,
1846         .id_table       = usbtouch_devices,
1847         .supports_autosuspend = 1,
1848 };
1849
1850 module_usb_driver(usbtouch_driver);
1851
1852 MODULE_AUTHOR("Daniel Ritz <daniel.ritz@gmx.ch>");
1853 MODULE_DESCRIPTION("USB Touchscreen Driver");
1854 MODULE_LICENSE("GPL");
1855
1856 MODULE_ALIAS("touchkitusb");
1857 MODULE_ALIAS("itmtouch");
1858 MODULE_ALIAS("mtouchusb");