drivers/input/touchscreen/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  *  - DMC TSC-10/25
  12  *  - IRTOUCHSYSTEMS/UNITOP
  13  *  - IdealTEK URTC1000
  14  *  - General Touch
  15  *  - GoTop Super_Q2/GogoPen/PenPower tablets
  16  *  - JASTEC USB touch controller/DigiTech DTR-02U
  17  *  - Zytronic capacitive touchscreen
  18  *  - NEXIO/iNexio
  19  *  - Elo TouchSystems 2700 IntelliTouch
  20  *  - EasyTouch USB Dual/Multi touch controller from Data Modul
  21  *
  22  * Copyright (C) 2004-2007 by Daniel Ritz <daniel.ritz@gmx.ch>
  23  * Copyright (C) by Todd E. Johnson (mtouchusb.c)
  24  *
  25  * This program is free software; you can redistribute it and/or
  26  * modify it under the terms of the GNU General Public License as
  27  * published by the Free Software Foundation; either version 2 of the
  28  * License, or (at your option) any later version.
  29  *
  30  * This program is distributed in the hope that it will be useful, but
  31  * WITHOUT ANY WARRANTY; without even the implied warranty of
  32  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  33  * General Public License for more details.
  34  *
  35  * You should have received a copy of the GNU General Public License
  36  * along with this program; if not, write to the Free Software
  37  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  38  *
  39  * Driver is based on touchkitusb.c
  40  * - ITM parts are from itmtouch.c
  41  * - 3M parts are from mtouchusb.c
  42  * - PanJit parts are from an unmerged driver by Lanslott Gish
  43  * - DMC TSC 10/25 are from Holger Schurig, with ideas from an unmerged
  44  *   driver from Marius Vollmer
  45  *
  46  *****************************************************************************/
  47
  48 //#define DEBUG
  49
  50 #include <linux/kernel.h>
  51 #include <linux/slab.h>
  52 #include <linux/input.h>
  53 #include <linux/module.h>
  54 #include <linux/usb.h>
  55 #include <linux/usb/input.h>
  56 #include <linux/hid.h>
  57 #include <linux/mutex.h>
  58
  59 static bool swap_xy;
  60 module_param(swap_xy, bool, 0644);
  61 MODULE_PARM_DESC(swap_xy, "If set X and Y axes are swapped.");
  62
  63 static bool hwcalib_xy;
  64 module_param(hwcalib_xy, bool, 0644);
  65 MODULE_PARM_DESC(hwcalib_xy, "If set hw-calibrated X/Y are used if available");
  66
  67 /* device specifc data/functions */
  68 struct usbtouch_usb;
  69 struct usbtouch_device_info {
  70         int min_xc, max_xc;
  71         int min_yc, max_yc;
  72         int min_press, max_press;
  73         int rept_size;
  74
  75         /*
  76          * Always service the USB devices irq not just when the input device is
  77          * open. This is useful when devices have a watchdog which prevents us
  78          * from periodically polling the device. Leave this unset unless your
  79          * touchscreen device requires it, as it does consume more of the USB
  80          * bandwidth.
  81          */
  82         bool irq_always;
  83
  84         void (*process_pkt) (struct usbtouch_usb *usbtouch, unsigned char *pkt, int len);
  85
  86         /*
  87          * used to get the packet len. possible return values:
  88          * > 0: packet len
  89          * = 0: skip one byte
  90          * < 0: -return value more bytes needed
  91          */
  92         int  (*get_pkt_len) (unsigned char *pkt, int len);
  93
  94         int  (*read_data)   (struct usbtouch_usb *usbtouch, unsigned char *pkt);
  95         int  (*alloc)       (struct usbtouch_usb *usbtouch);
  96         int  (*init)        (struct usbtouch_usb *usbtouch);
  97         void (*exit)        (struct usbtouch_usb *usbtouch);
  98 };
  99
 100 /* a usbtouch device */
 101 struct usbtouch_usb {
 102         unsigned char *data;
 103         dma_addr_t data_dma;
 104         int data_size;
 105         unsigned char *buffer;
 106         int buf_len;
 107         struct urb *irq;
 108         struct usb_interface *interface;
 109         struct input_dev *input;
 110         struct usbtouch_device_info *type;
 111         struct mutex pm_mutex;  /* serialize access to open/suspend */
 112         bool is_open;
 113         char name[128];
 114         char phys[64];
 115         void *priv;
 116
 117         int x, y;
 118         int touch, press;
 119 };
 120
 121
 122 /* device types */
 123 enum {
 124         DEVTYPE_IGNORE = -1,
 125         DEVTYPE_EGALAX,
 126         DEVTYPE_PANJIT,
 127         DEVTYPE_3M,
 128         DEVTYPE_ITM,
 129         DEVTYPE_ETURBO,
 130         DEVTYPE_GUNZE,
 131         DEVTYPE_DMC_TSC10,
 132         DEVTYPE_IRTOUCH,
 133         DEVTYPE_IRTOUCH_HIRES,
 134         DEVTYPE_IDEALTEK,
 135         DEVTYPE_GENERAL_TOUCH,
 136         DEVTYPE_GOTOP,
 137         DEVTYPE_JASTEC,
 138         DEVTYPE_E2I,
 139         DEVTYPE_ZYTRONIC,
 140         DEVTYPE_TC45USB,
 141         DEVTYPE_NEXIO,
 142         DEVTYPE_ELO,
 143         DEVTYPE_ETOUCH,
 144 };
 145
 146 #define USB_DEVICE_HID_CLASS(vend, prod) \
 147         .match_flags = USB_DEVICE_ID_MATCH_INT_CLASS \
 148                 | USB_DEVICE_ID_MATCH_DEVICE, \
 149         .idVendor = (vend), \
 150         .idProduct = (prod), \
 151         .bInterfaceClass = USB_INTERFACE_CLASS_HID
 152
 153 static const struct usb_device_id usbtouch_devices[] = {
 154 #ifdef CONFIG_TOUCHSCREEN_USB_EGALAX
 155         /* ignore the HID capable devices, handled by usbhid */
 156         {USB_DEVICE_HID_CLASS(0x0eef, 0x0001), .driver_info = DEVTYPE_IGNORE},
 157         {USB_DEVICE_HID_CLASS(0x0eef, 0x0002), .driver_info = DEVTYPE_IGNORE},
 158
 159         /* normal device IDs */
 160         {USB_DEVICE(0x3823, 0x0001), .driver_info = DEVTYPE_EGALAX},
 161         {USB_DEVICE(0x3823, 0x0002), .driver_info = DEVTYPE_EGALAX},
 162         {USB_DEVICE(0x0123, 0x0001), .driver_info = DEVTYPE_EGALAX},
 163         {USB_DEVICE(0x0eef, 0x0001), .driver_info = DEVTYPE_EGALAX},
 164         {USB_DEVICE(0x0eef, 0x0002), .driver_info = DEVTYPE_EGALAX},
 165         {USB_DEVICE(0x1234, 0x0001), .driver_info = DEVTYPE_EGALAX},
 166         {USB_DEVICE(0x1234, 0x0002), .driver_info = DEVTYPE_EGALAX},
 167 #endif
 168
 169 #ifdef CONFIG_TOUCHSCREEN_USB_PANJIT
 170         {USB_DEVICE(0x134c, 0x0001), .driver_info = DEVTYPE_PANJIT},
 171         {USB_DEVICE(0x134c, 0x0002), .driver_info = DEVTYPE_PANJIT},
 172         {USB_DEVICE(0x134c, 0x0003), .driver_info = DEVTYPE_PANJIT},
 173         {USB_DEVICE(0x134c, 0x0004), .driver_info = DEVTYPE_PANJIT},
 174 #endif
 175
 176 #ifdef CONFIG_TOUCHSCREEN_USB_3M
 177         {USB_DEVICE(0x0596, 0x0001), .driver_info = DEVTYPE_3M},
 178 #endif
 179
 180 #ifdef CONFIG_TOUCHSCREEN_USB_ITM
 181         {USB_DEVICE(0x0403, 0xf9e9), .driver_info = DEVTYPE_ITM},
 182         {USB_DEVICE(0x16e3, 0xf9e9), .driver_info = DEVTYPE_ITM},
 183 #endif
 184
 185 #ifdef CONFIG_TOUCHSCREEN_USB_ETURBO
 186         {USB_DEVICE(0x1234, 0x5678), .driver_info = DEVTYPE_ETURBO},
 187 #endif
 188
 189 #ifdef CONFIG_TOUCHSCREEN_USB_GUNZE
 190         {USB_DEVICE(0x0637, 0x0001), .driver_info = DEVTYPE_GUNZE},
 191 #endif
 192
 193 #ifdef CONFIG_TOUCHSCREEN_USB_DMC_TSC10
 194         {USB_DEVICE(0x0afa, 0x03e8), .driver_info = DEVTYPE_DMC_TSC10},
 195 #endif
 196
 197 #ifdef CONFIG_TOUCHSCREEN_USB_IRTOUCH
 198         {USB_DEVICE(0x255e, 0x0001), .driver_info = DEVTYPE_IRTOUCH},
 199         {USB_DEVICE(0x595a, 0x0001), .driver_info = DEVTYPE_IRTOUCH},
 200         {USB_DEVICE(0x6615, 0x0001), .driver_info = DEVTYPE_IRTOUCH},
 201         {USB_DEVICE(0x6615, 0x0012), .driver_info = DEVTYPE_IRTOUCH_HIRES},
 202 #endif
 203
 204 #ifdef CONFIG_TOUCHSCREEN_USB_IDEALTEK
 205         {USB_DEVICE(0x1391, 0x1000), .driver_info = DEVTYPE_IDEALTEK},
 206 #endif
 207
 208 #ifdef CONFIG_TOUCHSCREEN_USB_GENERAL_TOUCH
 209         {USB_DEVICE(0x0dfc, 0x0001), .driver_info = DEVTYPE_GENERAL_TOUCH},
 210 #endif
 211
 212 #ifdef CONFIG_TOUCHSCREEN_USB_GOTOP
 213         {USB_DEVICE(0x08f2, 0x007f), .driver_info = DEVTYPE_GOTOP},
 214         {USB_DEVICE(0x08f2, 0x00ce), .driver_info = DEVTYPE_GOTOP},
 215         {USB_DEVICE(0x08f2, 0x00f4), .driver_info = DEVTYPE_GOTOP},
 216 #endif
 217
 218 #ifdef CONFIG_TOUCHSCREEN_USB_JASTEC
 219         {USB_DEVICE(0x0f92, 0x0001), .driver_info = DEVTYPE_JASTEC},
 220 #endif
 221
 222 #ifdef CONFIG_TOUCHSCREEN_USB_E2I
 223         {USB_DEVICE(0x1ac7, 0x0001), .driver_info = DEVTYPE_E2I},
 224 #endif
 225
 226 #ifdef CONFIG_TOUCHSCREEN_USB_ZYTRONIC
 227         {USB_DEVICE(0x14c8, 0x0003), .driver_info = DEVTYPE_ZYTRONIC},
 228 #endif
 229
 230 #ifdef CONFIG_TOUCHSCREEN_USB_ETT_TC45USB
 231         /* TC5UH */
 232         {USB_DEVICE(0x0664, 0x0309), .driver_info = DEVTYPE_TC45USB},
 233         /* TC4UM */
 234         {USB_DEVICE(0x0664, 0x0306), .driver_info = DEVTYPE_TC45USB},
 235 #endif
 236
 237 #ifdef CONFIG_TOUCHSCREEN_USB_NEXIO
 238         /* data interface only */
 239         {USB_DEVICE_AND_INTERFACE_INFO(0x10f0, 0x2002, 0x0a, 0x00, 0x00),
 240                 .driver_info = DEVTYPE_NEXIO},
 241         {USB_DEVICE_AND_INTERFACE_INFO(0x1870, 0x0001, 0x0a, 0x00, 0x00),
 242                 .driver_info = DEVTYPE_NEXIO},
 243 #endif
 244
 245 #ifdef CONFIG_TOUCHSCREEN_USB_ELO
 246         {USB_DEVICE(0x04e7, 0x0020), .driver_info = DEVTYPE_ELO},
 247 #endif
 248
 249 #ifdef CONFIG_TOUCHSCREEN_USB_EASYTOUCH
 250         {USB_DEVICE(0x7374, 0x0001), .driver_info = DEVTYPE_ETOUCH},
 251 #endif
 252
 253         {}
 254 };
 255
 256
 257 /*****************************************************************************
 258  * e2i Part
 259  */
 260
 261 #ifdef CONFIG_TOUCHSCREEN_USB_E2I
 262 static int e2i_init(struct usbtouch_usb *usbtouch)
 263 {
 264         int ret;
 265         struct usb_device *udev = interface_to_usbdev(usbtouch->interface);
 266
 267         ret = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
 268                               0x01, 0x02, 0x0000, 0x0081,
 269                               NULL, 0, USB_CTRL_SET_TIMEOUT);
 270
 271         dev_dbg(&usbtouch->interface->dev,
 272                 "%s - usb_control_msg - E2I_RESET - bytes|err: %d\n",
 273                 __func__, ret);
 274         return ret;
 275 }
 276
 277 static int e2i_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 278 {
 279         int tmp = (pkt[0] << 8) | pkt[1];
 280         dev->x  = (pkt[2] << 8) | pkt[3];
 281         dev->y  = (pkt[4] << 8) | pkt[5];
 282
 283         tmp = tmp - 0xA000;
 284         dev->touch = (tmp > 0);
 285         dev->press = (tmp > 0 ? tmp : 0);
 286
 287         return 1;
 288 }
 289 #endif
 290
 291
 292 /*****************************************************************************
 293  * eGalax part
 294  */
 295
 296 #ifdef CONFIG_TOUCHSCREEN_USB_EGALAX
 297
 298 #ifndef MULTI_PACKET
 299 #define MULTI_PACKET
 300 #endif
 301
 302 #define EGALAX_PKT_TYPE_MASK            0xFE
 303 #define EGALAX_PKT_TYPE_REPT            0x80
 304 #define EGALAX_PKT_TYPE_DIAG            0x0A
 305
 306 static int egalax_init(struct usbtouch_usb *usbtouch)
 307 {
 308         int ret, i;
 309         unsigned char *buf;
 310         struct usb_device *udev = interface_to_usbdev(usbtouch->interface);
 311
 312         /*
 313          * An eGalax diagnostic packet kicks the device into using the right
 314          * protocol.  We send a "check active" packet.  The response will be
 315          * read later and ignored.
 316          */
 317
 318         buf = kmalloc(3, GFP_KERNEL);
 319         if (!buf)
 320                 return -ENOMEM;
 321
 322         buf[0] = EGALAX_PKT_TYPE_DIAG;
 323         buf[1] = 1;     /* length */
 324         buf[2] = 'A';   /* command - check active */
 325
 326         for (i = 0; i < 3; i++) {
 327                 ret = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
 328                                       0,
 329                                       USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 330                                       0, 0, buf, 3,
 331                                       USB_CTRL_SET_TIMEOUT);
 332                 if (ret >= 0) {
 333                         ret = 0;
 334                         break;
 335                 }
 336                 if (ret != -EPIPE)
 337                         break;
 338         }
 339
 340         kfree(buf);
 341
 342         return ret;
 343 }
 344
 345 static int egalax_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 346 {
 347         if ((pkt[0] & EGALAX_PKT_TYPE_MASK) != EGALAX_PKT_TYPE_REPT)
 348                 return 0;
 349
 350         dev->x = ((pkt[3] & 0x0F) << 7) | (pkt[4] & 0x7F);
 351         dev->y = ((pkt[1] & 0x0F) << 7) | (pkt[2] & 0x7F);
 352         dev->touch = pkt[0] & 0x01;
 353
 354         return 1;
 355 }
 356
 357 static int egalax_get_pkt_len(unsigned char *buf, int len)
 358 {
 359         switch (buf[0] & EGALAX_PKT_TYPE_MASK) {
 360         case EGALAX_PKT_TYPE_REPT:
 361                 return 5;
 362
 363         case EGALAX_PKT_TYPE_DIAG:
 364                 if (len < 2)
 365                         return -1;
 366
 367                 return buf[1] + 2;
 368         }
 369
 370         return 0;
 371 }
 372 #endif
 373
 374 /*****************************************************************************
 375  * EasyTouch part
 376  */
 377
 378 #ifdef CONFIG_TOUCHSCREEN_USB_EASYTOUCH
 379
 380 #ifndef MULTI_PACKET
 381 #define MULTI_PACKET
 382 #endif
 383
 384 #define ETOUCH_PKT_TYPE_MASK            0xFE
 385 #define ETOUCH_PKT_TYPE_REPT            0x80
 386 #define ETOUCH_PKT_TYPE_REPT2           0xB0
 387 #define ETOUCH_PKT_TYPE_DIAG            0x0A
 388
 389 static int etouch_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 390 {
 391         if ((pkt[0] & ETOUCH_PKT_TYPE_MASK) != ETOUCH_PKT_TYPE_REPT &&
 392                 (pkt[0] & ETOUCH_PKT_TYPE_MASK) != ETOUCH_PKT_TYPE_REPT2)
 393                 return 0;
 394
 395         dev->x = ((pkt[1] & 0x1F) << 7) | (pkt[2] & 0x7F);
 396         dev->y = ((pkt[3] & 0x1F) << 7) | (pkt[4] & 0x7F);
 397         dev->touch = pkt[0] & 0x01;
 398
 399         return 1;
 400 }
 401
 402 static int etouch_get_pkt_len(unsigned char *buf, int len)
 403 {
 404         switch (buf[0] & ETOUCH_PKT_TYPE_MASK) {
 405         case ETOUCH_PKT_TYPE_REPT:
 406         case ETOUCH_PKT_TYPE_REPT2:
 407                 return 5;
 408
 409         case ETOUCH_PKT_TYPE_DIAG:
 410                 if (len < 2)
 411                         return -1;
 412
 413                 return buf[1] + 2;
 414         }
 415
 416         return 0;
 417 }
 418 #endif
 419
 420 /*****************************************************************************
 421  * PanJit Part
 422  */
 423 #ifdef CONFIG_TOUCHSCREEN_USB_PANJIT
 424 static int panjit_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 425 {
 426         dev->x = ((pkt[2] & 0x0F) << 8) | pkt[1];
 427         dev->y = ((pkt[4] & 0x0F) << 8) | pkt[3];
 428         dev->touch = pkt[0] & 0x01;
 429
 430         return 1;
 431 }
 432 #endif
 433
 434
 435 /*****************************************************************************
 436  * 3M/Microtouch Part
 437  */
 438 #ifdef CONFIG_TOUCHSCREEN_USB_3M
 439
 440 #define MTOUCHUSB_ASYNC_REPORT          1
 441 #define MTOUCHUSB_RESET                 7
 442 #define MTOUCHUSB_REQ_CTRLLR_ID         10
 443
 444 #define MTOUCHUSB_REQ_CTRLLR_ID_LEN     16
 445
 446 static int mtouch_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 447 {
 448         if (hwcalib_xy) {
 449                 dev->x = (pkt[4] << 8) | pkt[3];
 450                 dev->y = 0xffff - ((pkt[6] << 8) | pkt[5]);
 451         } else {
 452                 dev->x = (pkt[8] << 8) | pkt[7];
 453                 dev->y = (pkt[10] << 8) | pkt[9];
 454         }
 455         dev->touch = (pkt[2] & 0x40) ? 1 : 0;
 456
 457         return 1;
 458 }
 459
 460 struct mtouch_priv {
 461         u8 fw_rev_major;
 462         u8 fw_rev_minor;
 463 };
 464
 465 static ssize_t mtouch_firmware_rev_show(struct device *dev,
 466                                 struct device_attribute *attr, char *output)
 467 {
 468         struct usb_interface *intf = to_usb_interface(dev);
 469         struct usbtouch_usb *usbtouch = usb_get_intfdata(intf);
 470         struct mtouch_priv *priv = usbtouch->priv;
 471
 472         return scnprintf(output, PAGE_SIZE, "%1x.%1x\n",
 473                          priv->fw_rev_major, priv->fw_rev_minor);
 474 }
 475 static DEVICE_ATTR(firmware_rev, 0444, mtouch_firmware_rev_show, NULL);
 476
 477 static struct attribute *mtouch_attrs[] = {
 478         &dev_attr_firmware_rev.attr,
 479         NULL
 480 };
 481
 482 static const struct attribute_group mtouch_attr_group = {
 483         .attrs = mtouch_attrs,
 484 };
 485
 486 static int mtouch_get_fw_revision(struct usbtouch_usb *usbtouch)
 487 {
 488         struct usb_device *udev = interface_to_usbdev(usbtouch->interface);
 489         struct mtouch_priv *priv = usbtouch->priv;
 490         u8 *buf;
 491         int ret;
 492
 493         buf = kzalloc(MTOUCHUSB_REQ_CTRLLR_ID_LEN, GFP_NOIO);
 494         if (!buf)
 495                 return -ENOMEM;
 496
 497         ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
 498                               MTOUCHUSB_REQ_CTRLLR_ID,
 499                               USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 500                               0, 0, buf, MTOUCHUSB_REQ_CTRLLR_ID_LEN,
 501                               USB_CTRL_SET_TIMEOUT);
 502         if (ret != MTOUCHUSB_REQ_CTRLLR_ID_LEN) {
 503                 dev_warn(&usbtouch->interface->dev,
 504                          "Failed to read FW rev: %d\n", ret);
 505                 ret = ret < 0 ? ret : -EIO;
 506                 goto free;
 507         }
 508
 509         priv->fw_rev_major = buf[3];
 510         priv->fw_rev_minor = buf[4];
 511
 512         ret = 0;
 513
 514 free:
 515         kfree(buf);
 516         return ret;
 517 }
 518
 519 static int mtouch_alloc(struct usbtouch_usb *usbtouch)
 520 {
 521         int ret;
 522
 523         usbtouch->priv = kmalloc(sizeof(struct mtouch_priv), GFP_KERNEL);
 524         if (!usbtouch->priv)
 525                 return -ENOMEM;
 526
 527         ret = sysfs_create_group(&usbtouch->interface->dev.kobj,
 528                                  &mtouch_attr_group);
 529         if (ret) {
 530                 kfree(usbtouch->priv);
 531                 usbtouch->priv = NULL;
 532                 return ret;
 533         }
 534
 535         return 0;
 536 }
 537
 538 static int mtouch_init(struct usbtouch_usb *usbtouch)
 539 {
 540         int ret, i;
 541         struct usb_device *udev = interface_to_usbdev(usbtouch->interface);
 542
 543         ret = mtouch_get_fw_revision(usbtouch);
 544         if (ret)
 545                 return ret;
 546
 547         ret = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
 548                               MTOUCHUSB_RESET,
 549                               USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 550                               1, 0, NULL, 0, USB_CTRL_SET_TIMEOUT);
 551         dev_dbg(&usbtouch->interface->dev,
 552                 "%s - usb_control_msg - MTOUCHUSB_RESET - bytes|err: %d\n",
 553                 __func__, ret);
 554         if (ret < 0)
 555                 return ret;
 556         msleep(150);
 557
 558         for (i = 0; i < 3; i++) {
 559                 ret = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
 560                                       MTOUCHUSB_ASYNC_REPORT,
 561                                       USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 562                                       1, 1, NULL, 0, USB_CTRL_SET_TIMEOUT);
 563                 dev_dbg(&usbtouch->interface->dev,
 564                         "%s - usb_control_msg - MTOUCHUSB_ASYNC_REPORT - bytes|err: %d\n",
 565                         __func__, ret);
 566                 if (ret >= 0)
 567                         break;
 568                 if (ret != -EPIPE)
 569                         return ret;
 570         }
 571
 572         /* Default min/max xy are the raw values, override if using hw-calib */
 573         if (hwcalib_xy) {
 574                 input_set_abs_params(usbtouch->input, ABS_X, 0, 0xffff, 0, 0);
 575                 input_set_abs_params(usbtouch->input, ABS_Y, 0, 0xffff, 0, 0);
 576         }
 577
 578         return 0;
 579 }
 580
 581 static void mtouch_exit(struct usbtouch_usb *usbtouch)
 582 {
 583         struct mtouch_priv *priv = usbtouch->priv;
 584
 585         sysfs_remove_group(&usbtouch->interface->dev.kobj, &mtouch_attr_group);
 586         kfree(priv);
 587 }
 588 #endif
 589
 590
 591 /*****************************************************************************
 592  * ITM Part
 593  */
 594 #ifdef CONFIG_TOUCHSCREEN_USB_ITM
 595 static int itm_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 596 {
 597         int touch;
 598         /*
 599          * ITM devices report invalid x/y data if not touched.
 600          * if the screen was touched before but is not touched any more
 601          * report touch as 0 with the last valid x/y data once. then stop
 602          * reporting data until touched again.
 603          */
 604         dev->press = ((pkt[2] & 0x01) << 7) | (pkt[5] & 0x7F);
 605
 606         touch = ~pkt[7] & 0x20;
 607         if (!touch) {
 608                 if (dev->touch) {
 609                         dev->touch = 0;
 610                         return 1;
 611                 }
 612
 613                 return 0;
 614         }
 615
 616         dev->x = ((pkt[0] & 0x1F) << 7) | (pkt[3] & 0x7F);
 617         dev->y = ((pkt[1] & 0x1F) << 7) | (pkt[4] & 0x7F);
 618         dev->touch = touch;
 619
 620         return 1;
 621 }
 622 #endif
 623
 624
 625 /*****************************************************************************
 626  * eTurboTouch part
 627  */
 628 #ifdef CONFIG_TOUCHSCREEN_USB_ETURBO
 629 #ifndef MULTI_PACKET
 630 #define MULTI_PACKET
 631 #endif
 632 static int eturbo_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 633 {
 634         unsigned int shift;
 635
 636         /* packets should start with sync */
 637         if (!(pkt[0] & 0x80))
 638                 return 0;
 639
 640         shift = (6 - (pkt[0] & 0x03));
 641         dev->x = ((pkt[3] << 7) | pkt[4]) >> shift;
 642         dev->y = ((pkt[1] << 7) | pkt[2]) >> shift;
 643         dev->touch = (pkt[0] & 0x10) ? 1 : 0;
 644
 645         return 1;
 646 }
 647
 648 static int eturbo_get_pkt_len(unsigned char *buf, int len)
 649 {
 650         if (buf[0] & 0x80)
 651                 return 5;
 652         if (buf[0] == 0x01)
 653                 return 3;
 654         return 0;
 655 }
 656 #endif
 657
 658
 659 /*****************************************************************************
 660  * Gunze part
 661  */
 662 #ifdef CONFIG_TOUCHSCREEN_USB_GUNZE
 663 static int gunze_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 664 {
 665         if (!(pkt[0] & 0x80) || ((pkt[1] | pkt[2] | pkt[3]) & 0x80))
 666                 return 0;
 667
 668         dev->x = ((pkt[0] & 0x1F) << 7) | (pkt[2] & 0x7F);
 669         dev->y = ((pkt[1] & 0x1F) << 7) | (pkt[3] & 0x7F);
 670         dev->touch = pkt[0] & 0x20;
 671
 672         return 1;
 673 }
 674 #endif
 675
 676 /*****************************************************************************
 677  * DMC TSC-10/25 Part
 678  *
 679  * Documentation about the controller and it's protocol can be found at
 680  *   http://www.dmccoltd.com/files/controler/tsc10usb_pi_e.pdf
 681  *   http://www.dmccoltd.com/files/controler/tsc25_usb_e.pdf
 682  */
 683 #ifdef CONFIG_TOUCHSCREEN_USB_DMC_TSC10
 684
 685 /* supported data rates. currently using 130 */
 686 #define TSC10_RATE_POINT        0x50
 687 #define TSC10_RATE_30           0x40
 688 #define TSC10_RATE_50           0x41
 689 #define TSC10_RATE_80           0x42
 690 #define TSC10_RATE_100          0x43
 691 #define TSC10_RATE_130          0x44
 692 #define TSC10_RATE_150          0x45
 693
 694 /* commands */
 695 #define TSC10_CMD_RESET         0x55
 696 #define TSC10_CMD_RATE          0x05
 697 #define TSC10_CMD_DATA1         0x01
 698
 699 static int dmc_tsc10_init(struct usbtouch_usb *usbtouch)
 700 {
 701         struct usb_device *dev = interface_to_usbdev(usbtouch->interface);
 702         int ret = -ENOMEM;
 703         unsigned char *buf;
 704
 705         buf = kmalloc(2, GFP_NOIO);
 706         if (!buf)
 707                 goto err_nobuf;
 708         /* reset */
 709         buf[0] = buf[1] = 0xFF;
 710         ret = usb_control_msg(dev, usb_rcvctrlpipe (dev, 0),
 711                               TSC10_CMD_RESET,
 712                               USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 713                               0, 0, buf, 2, USB_CTRL_SET_TIMEOUT);
 714         if (ret < 0)
 715                 goto err_out;
 716         if (buf[0] != 0x06) {
 717                 ret = -ENODEV;
 718                 goto err_out;
 719         }
 720
 721         /* TSC-25 data sheet specifies a delay after the RESET command */
 722         msleep(150);
 723
 724         /* set coordinate output rate */
 725         buf[0] = buf[1] = 0xFF;
 726         ret = usb_control_msg(dev, usb_rcvctrlpipe (dev, 0),
 727                               TSC10_CMD_RATE,
 728                               USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 729                               TSC10_RATE_150, 0, buf, 2, USB_CTRL_SET_TIMEOUT);
 730         if (ret < 0)
 731                 goto err_out;
 732         if ((buf[0] != 0x06) && (buf[0] != 0x15 || buf[1] != 0x01)) {
 733                 ret = -ENODEV;
 734                 goto err_out;
 735         }
 736
 737         /* start sending data */
 738         ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
 739                               TSC10_CMD_DATA1,
 740                               USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 741                               0, 0, NULL, 0, USB_CTRL_SET_TIMEOUT);
 742 err_out:
 743         kfree(buf);
 744 err_nobuf:
 745         return ret;
 746 }
 747
 748
 749 static int dmc_tsc10_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 750 {
 751         dev->x = ((pkt[2] & 0x03) << 8) | pkt[1];
 752         dev->y = ((pkt[4] & 0x03) << 8) | pkt[3];
 753         dev->touch = pkt[0] & 0x01;
 754
 755         return 1;
 756 }
 757 #endif
 758
 759
 760 /*****************************************************************************
 761  * IRTOUCH Part
 762  */
 763 #ifdef CONFIG_TOUCHSCREEN_USB_IRTOUCH
 764 static int irtouch_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 765 {
 766         dev->x = (pkt[3] << 8) | pkt[2];
 767         dev->y = (pkt[5] << 8) | pkt[4];
 768         dev->touch = (pkt[1] & 0x03) ? 1 : 0;
 769
 770         return 1;
 771 }
 772 #endif
 773
 774 /*****************************************************************************
 775  * ET&T TC5UH/TC4UM part
 776  */
 777 #ifdef CONFIG_TOUCHSCREEN_USB_ETT_TC45USB
 778 static int tc45usb_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 779 {
 780         dev->x = ((pkt[2] & 0x0F) << 8) | pkt[1];
 781         dev->y = ((pkt[4] & 0x0F) << 8) | pkt[3];
 782         dev->touch = pkt[0] & 0x01;
 783
 784         return 1;
 785 }
 786 #endif
 787
 788 /*****************************************************************************
 789  * IdealTEK URTC1000 Part
 790  */
 791 #ifdef CONFIG_TOUCHSCREEN_USB_IDEALTEK
 792 #ifndef MULTI_PACKET
 793 #define MULTI_PACKET
 794 #endif
 795 static int idealtek_get_pkt_len(unsigned char *buf, int len)
 796 {
 797         if (buf[0] & 0x80)
 798                 return 5;
 799         if (buf[0] == 0x01)
 800                 return len;
 801         return 0;
 802 }
 803
 804 static int idealtek_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 805 {
 806         switch (pkt[0] & 0x98) {
 807         case 0x88:
 808                 /* touch data in IdealTEK mode */
 809                 dev->x = (pkt[1] << 5) | (pkt[2] >> 2);
 810                 dev->y = (pkt[3] << 5) | (pkt[4] >> 2);
 811                 dev->touch = (pkt[0] & 0x40) ? 1 : 0;
 812                 return 1;
 813
 814         case 0x98:
 815                 /* touch data in MT emulation mode */
 816                 dev->x = (pkt[2] << 5) | (pkt[1] >> 2);
 817                 dev->y = (pkt[4] << 5) | (pkt[3] >> 2);
 818                 dev->touch = (pkt[0] & 0x40) ? 1 : 0;
 819                 return 1;
 820
 821         default:
 822                 return 0;
 823         }
 824 }
 825 #endif
 826
 827 /*****************************************************************************
 828  * General Touch Part
 829  */
 830 #ifdef CONFIG_TOUCHSCREEN_USB_GENERAL_TOUCH
 831 static int general_touch_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 832 {
 833         dev->x = (pkt[2] << 8) | pkt[1];
 834         dev->y = (pkt[4] << 8) | pkt[3];
 835         dev->press = pkt[5] & 0xff;
 836         dev->touch = pkt[0] & 0x01;
 837
 838         return 1;
 839 }
 840 #endif
 841
 842 /*****************************************************************************
 843  * GoTop Part
 844  */
 845 #ifdef CONFIG_TOUCHSCREEN_USB_GOTOP
 846 static int gotop_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 847 {
 848         dev->x = ((pkt[1] & 0x38) << 4) | pkt[2];
 849         dev->y = ((pkt[1] & 0x07) << 7) | pkt[3];
 850         dev->touch = pkt[0] & 0x01;
 851
 852         return 1;
 853 }
 854 #endif
 855
 856 /*****************************************************************************
 857  * JASTEC Part
 858  */
 859 #ifdef CONFIG_TOUCHSCREEN_USB_JASTEC
 860 static int jastec_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 861 {
 862         dev->x = ((pkt[0] & 0x3f) << 6) | (pkt[2] & 0x3f);
 863         dev->y = ((pkt[1] & 0x3f) << 6) | (pkt[3] & 0x3f);
 864         dev->touch = (pkt[0] & 0x40) >> 6;
 865
 866         return 1;
 867 }
 868 #endif
 869
 870 /*****************************************************************************
 871  * Zytronic Part
 872  */
 873 #ifdef CONFIG_TOUCHSCREEN_USB_ZYTRONIC
 874 static int zytronic_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 875 {
 876         struct usb_interface *intf = dev->interface;
 877
 878         switch (pkt[0]) {
 879         case 0x3A: /* command response */
 880                 dev_dbg(&intf->dev, "%s: Command response %d\n", __func__, pkt[1]);
 881                 break;
 882
 883         case 0xC0: /* down */
 884                 dev->x = (pkt[1] & 0x7f) | ((pkt[2] & 0x07) << 7);
 885                 dev->y = (pkt[3] & 0x7f) | ((pkt[4] & 0x07) << 7);
 886                 dev->touch = 1;
 887                 dev_dbg(&intf->dev, "%s: down %d,%d\n", __func__, dev->x, dev->y);
 888                 return 1;
 889
 890         case 0x80: /* up */
 891                 dev->x = (pkt[1] & 0x7f) | ((pkt[2] & 0x07) << 7);
 892                 dev->y = (pkt[3] & 0x7f) | ((pkt[4] & 0x07) << 7);
 893                 dev->touch = 0;
 894                 dev_dbg(&intf->dev, "%s: up %d,%d\n", __func__, dev->x, dev->y);
 895                 return 1;
 896
 897         default:
 898                 dev_dbg(&intf->dev, "%s: Unknown return %d\n", __func__, pkt[0]);
 899                 break;
 900         }
 901
 902         return 0;
 903 }
 904 #endif
 905
 906 /*****************************************************************************
 907  * NEXIO Part
 908  */
 909 #ifdef CONFIG_TOUCHSCREEN_USB_NEXIO
 910
 911 #define NEXIO_TIMEOUT   5000
 912 #define NEXIO_BUFSIZE   1024
 913 #define NEXIO_THRESHOLD 50
 914
 915 struct nexio_priv {
 916         struct urb *ack;
 917         unsigned char *ack_buf;
 918 };
 919
 920 struct nexio_touch_packet {
 921         u8      flags;          /* 0xe1 = touch, 0xe1 = release */
 922         __be16  data_len;       /* total bytes of touch data */
 923         __be16  x_len;          /* bytes for X axis */
 924         __be16  y_len;          /* bytes for Y axis */
 925         u8      data[];
 926 } __attribute__ ((packed));
 927
 928 static unsigned char nexio_ack_pkt[2] = { 0xaa, 0x02 };
 929 static unsigned char nexio_init_pkt[4] = { 0x82, 0x04, 0x0a, 0x0f };
 930
 931 static void nexio_ack_complete(struct urb *urb)
 932 {
 933 }
 934
 935 static int nexio_alloc(struct usbtouch_usb *usbtouch)
 936 {
 937         struct nexio_priv *priv;
 938         int ret = -ENOMEM;
 939
 940         usbtouch->priv = kmalloc(sizeof(struct nexio_priv), GFP_KERNEL);
 941         if (!usbtouch->priv)
 942                 goto out_buf;
 943
 944         priv = usbtouch->priv;
 945
 946         priv->ack_buf = kmemdup(nexio_ack_pkt, sizeof(nexio_ack_pkt),
 947                                 GFP_KERNEL);
 948         if (!priv->ack_buf)
 949                 goto err_priv;
 950
 951         priv->ack = usb_alloc_urb(0, GFP_KERNEL);
 952         if (!priv->ack) {
 953                 dev_dbg(&usbtouch->interface->dev,
 954                         "%s - usb_alloc_urb failed: usbtouch->ack\n", __func__);
 955                 goto err_ack_buf;
 956         }
 957
 958         return 0;
 959
 960 err_ack_buf:
 961         kfree(priv->ack_buf);
 962 err_priv:
 963         kfree(priv);
 964 out_buf:
 965         return ret;
 966 }
 967
 968 static int nexio_init(struct usbtouch_usb *usbtouch)
 969 {
 970         struct usb_device *dev = interface_to_usbdev(usbtouch->interface);
 971         struct usb_host_interface *interface = usbtouch->interface->cur_altsetting;
 972         struct nexio_priv *priv = usbtouch->priv;
 973         int ret = -ENOMEM;
 974         int actual_len, i;
 975         unsigned char *buf;
 976         char *firmware_ver = NULL, *device_name = NULL;
 977         int input_ep = 0, output_ep = 0;
 978
 979         /* find first input and output endpoint */
 980         for (i = 0; i < interface->desc.bNumEndpoints; i++) {
 981                 if (!input_ep &&
 982                     usb_endpoint_dir_in(&interface->endpoint[i].desc))
 983                         input_ep = interface->endpoint[i].desc.bEndpointAddress;
 984                 if (!output_ep &&
 985                     usb_endpoint_dir_out(&interface->endpoint[i].desc))
 986                         output_ep = interface->endpoint[i].desc.bEndpointAddress;
 987         }
 988         if (!input_ep || !output_ep)
 989                 return -ENXIO;
 990
 991         buf = kmalloc(NEXIO_BUFSIZE, GFP_NOIO);
 992         if (!buf)
 993                 goto out_buf;
 994
 995         /* two empty reads */
 996         for (i = 0; i < 2; i++) {
 997                 ret = usb_bulk_msg(dev, usb_rcvbulkpipe(dev, input_ep),
 998                                    buf, NEXIO_BUFSIZE, &actual_len,
 999                                    NEXIO_TIMEOUT);
1000                 if (ret < 0)
1001                         goto out_buf;
1002         }
1003
1004         /* send init command */
1005         memcpy(buf, nexio_init_pkt, sizeof(nexio_init_pkt));
1006         ret = usb_bulk_msg(dev, usb_sndbulkpipe(dev, output_ep),
1007                            buf, sizeof(nexio_init_pkt), &actual_len,
1008                            NEXIO_TIMEOUT);
1009         if (ret < 0)
1010                 goto out_buf;
1011
1012         /* read replies */
1013         for (i = 0; i < 3; i++) {
1014                 memset(buf, 0, NEXIO_BUFSIZE);
1015                 ret = usb_bulk_msg(dev, usb_rcvbulkpipe(dev, input_ep),
1016                                    buf, NEXIO_BUFSIZE, &actual_len,
1017                                    NEXIO_TIMEOUT);
1018                 if (ret < 0 || actual_len < 1 || buf[1] != actual_len)
1019                         continue;
1020                 switch (buf[0]) {
1021                 case 0x83:      /* firmware version */
1022                         if (!firmware_ver)
1023                                 firmware_ver = kstrdup(&buf[2], GFP_NOIO);
1024                         break;
1025                 case 0x84:      /* device name */
1026                         if (!device_name)
1027                                 device_name = kstrdup(&buf[2], GFP_NOIO);
1028                         break;
1029                 }
1030         }
1031
1032         printk(KERN_INFO "Nexio device: %s, firmware version: %s\n",
1033                device_name, firmware_ver);
1034
1035         kfree(firmware_ver);
1036         kfree(device_name);
1037
1038         usb_fill_bulk_urb(priv->ack, dev, usb_sndbulkpipe(dev, output_ep),
1039                           priv->ack_buf, sizeof(nexio_ack_pkt),
1040                           nexio_ack_complete, usbtouch);
1041         ret = 0;
1042
1043 out_buf:
1044         kfree(buf);
1045         return ret;
1046 }
1047
1048 static void nexio_exit(struct usbtouch_usb *usbtouch)
1049 {
1050         struct nexio_priv *priv = usbtouch->priv;
1051
1052         usb_kill_urb(priv->ack);
1053         usb_free_urb(priv->ack);
1054         kfree(priv->ack_buf);
1055         kfree(priv);
1056 }
1057
1058 static int nexio_read_data(struct usbtouch_usb *usbtouch, unsigned char *pkt)
1059 {
1060         struct nexio_touch_packet *packet = (void *) pkt;
1061         struct nexio_priv *priv = usbtouch->priv;
1062         unsigned int data_len = be16_to_cpu(packet->data_len);
1063         unsigned int x_len = be16_to_cpu(packet->x_len);
1064         unsigned int y_len = be16_to_cpu(packet->y_len);
1065         int x, y, begin_x, begin_y, end_x, end_y, w, h, ret;
1066
1067         /* got touch data? */
1068         if ((pkt[0] & 0xe0) != 0xe0)
1069                 return 0;
1070
1071         if (data_len > 0xff)
1072                 data_len -= 0x100;
1073         if (x_len > 0xff)
1074                 x_len -= 0x80;
1075
1076         /* send ACK */
1077         ret = usb_submit_urb(priv->ack, GFP_ATOMIC);
1078
1079         if (!usbtouch->type->max_xc) {
1080                 usbtouch->type->max_xc = 2 * x_len;
1081                 input_set_abs_params(usbtouch->input, ABS_X,
1082                                      0, usbtouch->type->max_xc, 0, 0);
1083                 usbtouch->type->max_yc = 2 * y_len;
1084                 input_set_abs_params(usbtouch->input, ABS_Y,
1085                                      0, usbtouch->type->max_yc, 0, 0);
1086         }
1087         /*
1088          * The device reports state of IR sensors on X and Y axes.
1089          * Each byte represents "darkness" percentage (0-100) of one element.
1090          * 17" touchscreen reports only 64 x 52 bytes so the resolution is low.
1091          * This also means that there's a limited multi-touch capability but
1092          * it's disabled (and untested) here as there's no X driver for that.
1093          */
1094         begin_x = end_x = begin_y = end_y = -1;
1095         for (x = 0; x < x_len; x++) {
1096                 if (begin_x == -1 && packet->data[x] > NEXIO_THRESHOLD) {
1097                         begin_x = x;
1098                         continue;
1099                 }
1100                 if (end_x == -1 && begin_x != -1 && packet->data[x] < NEXIO_THRESHOLD) {
1101                         end_x = x - 1;
1102                         for (y = x_len; y < data_len; y++) {
1103                                 if (begin_y == -1 && packet->data[y] > NEXIO_THRESHOLD) {
1104                                         begin_y = y - x_len;
1105                                         continue;
1106                                 }
1107                                 if (end_y == -1 &&
1108                                     begin_y != -1 && packet->data[y] < NEXIO_THRESHOLD) {
1109                                         end_y = y - 1 - x_len;
1110                                         w = end_x - begin_x;
1111                                         h = end_y - begin_y;
1112 #if 0
1113                                         /* multi-touch */
1114                                         input_report_abs(usbtouch->input,
1115                                                     ABS_MT_TOUCH_MAJOR, max(w,h));
1116                                         input_report_abs(usbtouch->input,
1117                                                     ABS_MT_TOUCH_MINOR, min(x,h));
1118                                         input_report_abs(usbtouch->input,
1119                                                     ABS_MT_POSITION_X, 2*begin_x+w);
1120                                         input_report_abs(usbtouch->input,
1121                                                     ABS_MT_POSITION_Y, 2*begin_y+h);
1122                                         input_report_abs(usbtouch->input,
1123                                                     ABS_MT_ORIENTATION, w > h);
1124                                         input_mt_sync(usbtouch->input);
1125 #endif
1126                                         /* single touch */
1127                                         usbtouch->x = 2 * begin_x + w;
1128                                         usbtouch->y = 2 * begin_y + h;
1129                                         usbtouch->touch = packet->flags & 0x01;
1130                                         begin_y = end_y = -1;
1131                                         return 1;
1132                                 }
1133                         }
1134                         begin_x = end_x = -1;
1135                 }
1136
1137         }
1138         return 0;
1139 }
1140 #endif
1141
1142
1143 /*****************************************************************************
1144  * ELO part
1145  */
1146
1147 #ifdef CONFIG_TOUCHSCREEN_USB_ELO
1148
1149 static int elo_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
1150 {
1151         dev->x = (pkt[3] << 8) | pkt[2];
1152         dev->y = (pkt[5] << 8) | pkt[4];
1153         dev->touch = pkt[6] > 0;
1154         dev->press = pkt[6];
1155
1156         return 1;
1157 }
1158 #endif
1159
1160
1161 /*****************************************************************************
1162  * the different device descriptors
1163  */
1164 #ifdef MULTI_PACKET
1165 static void usbtouch_process_multi(struct usbtouch_usb *usbtouch,
1166                                    unsigned char *pkt, int len);
1167 #endif
1168
1169 static struct usbtouch_device_info usbtouch_dev_info[] = {
1170 #ifdef CONFIG_TOUCHSCREEN_USB_ELO
1171         [DEVTYPE_ELO] = {
1172                 .min_xc         = 0x0,
1173                 .max_xc         = 0x0fff,
1174                 .min_yc         = 0x0,
1175                 .max_yc         = 0x0fff,
1176                 .max_press      = 0xff,
1177                 .rept_size      = 8,
1178                 .read_data      = elo_read_data,
1179         },
1180 #endif
1181
1182 #ifdef CONFIG_TOUCHSCREEN_USB_EGALAX
1183         [DEVTYPE_EGALAX] = {
1184                 .min_xc         = 0x0,
1185                 .max_xc         = 0x07ff,
1186                 .min_yc         = 0x0,
1187                 .max_yc         = 0x07ff,
1188                 .rept_size      = 16,
1189                 .process_pkt    = usbtouch_process_multi,
1190                 .get_pkt_len    = egalax_get_pkt_len,
1191                 .read_data      = egalax_read_data,
1192                 .init           = egalax_init,
1193         },
1194 #endif
1195
1196 #ifdef CONFIG_TOUCHSCREEN_USB_PANJIT
1197         [DEVTYPE_PANJIT] = {
1198                 .min_xc         = 0x0,
1199                 .max_xc         = 0x0fff,
1200                 .min_yc         = 0x0,
1201                 .max_yc         = 0x0fff,
1202                 .rept_size      = 8,
1203                 .read_data      = panjit_read_data,
1204         },
1205 #endif
1206
1207 #ifdef CONFIG_TOUCHSCREEN_USB_3M
1208         [DEVTYPE_3M] = {
1209                 .min_xc         = 0x0,
1210                 .max_xc         = 0x4000,
1211                 .min_yc         = 0x0,
1212                 .max_yc         = 0x4000,
1213                 .rept_size      = 11,
1214                 .read_data      = mtouch_read_data,
1215                 .alloc          = mtouch_alloc,
1216                 .init           = mtouch_init,
1217                 .exit           = mtouch_exit,
1218         },
1219 #endif
1220
1221 #ifdef CONFIG_TOUCHSCREEN_USB_ITM
1222         [DEVTYPE_ITM] = {
1223                 .min_xc         = 0x0,
1224                 .max_xc         = 0x0fff,
1225                 .min_yc         = 0x0,
1226                 .max_yc         = 0x0fff,
1227                 .max_press      = 0xff,
1228                 .rept_size      = 8,
1229                 .read_data      = itm_read_data,
1230         },
1231 #endif
1232
1233 #ifdef CONFIG_TOUCHSCREEN_USB_ETURBO
1234         [DEVTYPE_ETURBO] = {
1235                 .min_xc         = 0x0,
1236                 .max_xc         = 0x07ff,
1237                 .min_yc         = 0x0,
1238                 .max_yc         = 0x07ff,
1239                 .rept_size      = 8,
1240                 .process_pkt    = usbtouch_process_multi,
1241                 .get_pkt_len    = eturbo_get_pkt_len,
1242                 .read_data      = eturbo_read_data,
1243         },
1244 #endif
1245
1246 #ifdef CONFIG_TOUCHSCREEN_USB_GUNZE
1247         [DEVTYPE_GUNZE] = {
1248                 .min_xc         = 0x0,
1249                 .max_xc         = 0x0fff,
1250                 .min_yc         = 0x0,
1251                 .max_yc         = 0x0fff,
1252                 .rept_size      = 4,
1253                 .read_data      = gunze_read_data,
1254         },
1255 #endif
1256
1257 #ifdef CONFIG_TOUCHSCREEN_USB_DMC_TSC10
1258         [DEVTYPE_DMC_TSC10] = {
1259                 .min_xc         = 0x0,
1260                 .max_xc         = 0x03ff,
1261                 .min_yc         = 0x0,
1262                 .max_yc         = 0x03ff,
1263                 .rept_size      = 5,
1264                 .init           = dmc_tsc10_init,
1265                 .read_data      = dmc_tsc10_read_data,
1266         },
1267 #endif
1268
1269 #ifdef CONFIG_TOUCHSCREEN_USB_IRTOUCH
1270         [DEVTYPE_IRTOUCH] = {
1271                 .min_xc         = 0x0,
1272                 .max_xc         = 0x0fff,
1273                 .min_yc         = 0x0,
1274                 .max_yc         = 0x0fff,
1275                 .rept_size      = 8,
1276                 .read_data      = irtouch_read_data,
1277         },
1278
1279         [DEVTYPE_IRTOUCH_HIRES] = {
1280                 .min_xc         = 0x0,
1281                 .max_xc         = 0x7fff,
1282                 .min_yc         = 0x0,
1283                 .max_yc         = 0x7fff,
1284                 .rept_size      = 8,
1285                 .read_data      = irtouch_read_data,
1286         },
1287 #endif
1288
1289 #ifdef CONFIG_TOUCHSCREEN_USB_IDEALTEK
1290         [DEVTYPE_IDEALTEK] = {
1291                 .min_xc         = 0x0,
1292                 .max_xc         = 0x0fff,
1293                 .min_yc         = 0x0,
1294                 .max_yc         = 0x0fff,
1295                 .rept_size      = 8,
1296                 .process_pkt    = usbtouch_process_multi,
1297                 .get_pkt_len    = idealtek_get_pkt_len,
1298                 .read_data      = idealtek_read_data,
1299         },
1300 #endif
1301
1302 #ifdef CONFIG_TOUCHSCREEN_USB_GENERAL_TOUCH
1303         [DEVTYPE_GENERAL_TOUCH] = {
1304                 .min_xc         = 0x0,
1305                 .max_xc         = 0x7fff,
1306                 .min_yc         = 0x0,
1307                 .max_yc         = 0x7fff,
1308                 .rept_size      = 7,
1309                 .read_data      = general_touch_read_data,
1310         },
1311 #endif
1312
1313 #ifdef CONFIG_TOUCHSCREEN_USB_GOTOP
1314         [DEVTYPE_GOTOP] = {
1315                 .min_xc         = 0x0,
1316                 .max_xc         = 0x03ff,
1317                 .min_yc         = 0x0,
1318                 .max_yc         = 0x03ff,
1319                 .rept_size      = 4,
1320                 .read_data      = gotop_read_data,
1321         },
1322 #endif
1323
1324 #ifdef CONFIG_TOUCHSCREEN_USB_JASTEC
1325         [DEVTYPE_JASTEC] = {
1326                 .min_xc         = 0x0,
1327                 .max_xc         = 0x0fff,
1328                 .min_yc         = 0x0,
1329                 .max_yc         = 0x0fff,
1330                 .rept_size      = 4,
1331                 .read_data      = jastec_read_data,
1332         },
1333 #endif
1334
1335 #ifdef CONFIG_TOUCHSCREEN_USB_E2I
1336         [DEVTYPE_E2I] = {
1337                 .min_xc         = 0x0,
1338                 .max_xc         = 0x7fff,
1339                 .min_yc         = 0x0,
1340                 .max_yc         = 0x7fff,
1341                 .rept_size      = 6,
1342                 .init           = e2i_init,
1343                 .read_data      = e2i_read_data,
1344         },
1345 #endif
1346
1347 #ifdef CONFIG_TOUCHSCREEN_USB_ZYTRONIC
1348         [DEVTYPE_ZYTRONIC] = {
1349                 .min_xc         = 0x0,
1350                 .max_xc         = 0x03ff,
1351                 .min_yc         = 0x0,
1352                 .max_yc         = 0x03ff,
1353                 .rept_size      = 5,
1354                 .read_data      = zytronic_read_data,
1355                 .irq_always     = true,
1356         },
1357 #endif
1358
1359 #ifdef CONFIG_TOUCHSCREEN_USB_ETT_TC45USB
1360         [DEVTYPE_TC45USB] = {
1361                 .min_xc         = 0x0,
1362                 .max_xc         = 0x0fff,
1363                 .min_yc         = 0x0,
1364                 .max_yc         = 0x0fff,
1365                 .rept_size      = 5,
1366                 .read_data      = tc45usb_read_data,
1367         },
1368 #endif
1369
1370 #ifdef CONFIG_TOUCHSCREEN_USB_NEXIO
1371         [DEVTYPE_NEXIO] = {
1372                 .rept_size      = 1024,
1373                 .irq_always     = true,
1374                 .read_data      = nexio_read_data,
1375                 .alloc          = nexio_alloc,
1376                 .init           = nexio_init,
1377                 .exit           = nexio_exit,
1378         },
1379 #endif
1380 #ifdef CONFIG_TOUCHSCREEN_USB_EASYTOUCH
1381         [DEVTYPE_ETOUCH] = {
1382                 .min_xc         = 0x0,
1383                 .max_xc         = 0x07ff,
1384                 .min_yc         = 0x0,
1385                 .max_yc         = 0x07ff,
1386                 .rept_size      = 16,
1387                 .process_pkt    = usbtouch_process_multi,
1388                 .get_pkt_len    = etouch_get_pkt_len,
1389                 .read_data      = etouch_read_data,
1390         },
1391 #endif
1392 };
1393
1394
1395 /*****************************************************************************
1396  * Generic Part
1397  */
1398 static void usbtouch_process_pkt(struct usbtouch_usb *usbtouch,
1399                                  unsigned char *pkt, int len)
1400 {
1401         struct usbtouch_device_info *type = usbtouch->type;
1402
1403         if (!type->read_data(usbtouch, pkt))
1404                         return;
1405
1406         input_report_key(usbtouch->input, BTN_TOUCH, usbtouch->touch);
1407
1408         if (swap_xy) {
1409                 input_report_abs(usbtouch->input, ABS_X, usbtouch->y);
1410                 input_report_abs(usbtouch->input, ABS_Y, usbtouch->x);
1411         } else {
1412                 input_report_abs(usbtouch->input, ABS_X, usbtouch->x);
1413                 input_report_abs(usbtouch->input, ABS_Y, usbtouch->y);
1414         }
1415         if (type->max_press)
1416                 input_report_abs(usbtouch->input, ABS_PRESSURE, usbtouch->press);
1417         input_sync(usbtouch->input);
1418 }
1419
1420
1421 #ifdef MULTI_PACKET
1422 static void usbtouch_process_multi(struct usbtouch_usb *usbtouch,
1423                                    unsigned char *pkt, int len)
1424 {
1425         unsigned char *buffer;
1426         int pkt_len, pos, buf_len, tmp;
1427
1428         /* process buffer */
1429         if (unlikely(usbtouch->buf_len)) {
1430                 /* try to get size */
1431                 pkt_len = usbtouch->type->get_pkt_len(
1432                                 usbtouch->buffer, usbtouch->buf_len);
1433
1434                 /* drop? */
1435                 if (unlikely(!pkt_len))
1436                         goto out_flush_buf;
1437
1438                 /* need to append -pkt_len bytes before able to get size */
1439                 if (unlikely(pkt_len < 0)) {
1440                         int append = -pkt_len;
1441                         if (unlikely(append > len))
1442                                append = len;
1443                         if (usbtouch->buf_len + append >= usbtouch->type->rept_size)
1444                                 goto out_flush_buf;
1445                         memcpy(usbtouch->buffer + usbtouch->buf_len, pkt, append);
1446                         usbtouch->buf_len += append;
1447
1448                         pkt_len = usbtouch->type->get_pkt_len(
1449                                         usbtouch->buffer, usbtouch->buf_len);
1450                         if (pkt_len < 0)
1451                                 return;
1452                 }
1453
1454                 /* append */
1455                 tmp = pkt_len - usbtouch->buf_len;
1456                 if (usbtouch->buf_len + tmp >= usbtouch->type->rept_size)
1457                         goto out_flush_buf;
1458                 memcpy(usbtouch->buffer + usbtouch->buf_len, pkt, tmp);
1459                 usbtouch_process_pkt(usbtouch, usbtouch->buffer, pkt_len);
1460
1461                 buffer = pkt + tmp;
1462                 buf_len = len - tmp;
1463         } else {
1464                 buffer = pkt;
1465                 buf_len = len;
1466         }
1467
1468         /* loop over the received packet, process */
1469         pos = 0;
1470         while (pos < buf_len) {
1471                 /* get packet len */
1472                 pkt_len = usbtouch->type->get_pkt_len(buffer + pos,
1473                                                         buf_len - pos);
1474
1475                 /* unknown packet: skip one byte */
1476                 if (unlikely(!pkt_len)) {
1477                         pos++;
1478                         continue;
1479                 }
1480
1481                 /* full packet: process */
1482                 if (likely((pkt_len > 0) && (pkt_len <= buf_len - pos))) {
1483                         usbtouch_process_pkt(usbtouch, buffer + pos, pkt_len);
1484                 } else {
1485                         /* incomplete packet: save in buffer */
1486                         memcpy(usbtouch->buffer, buffer + pos, buf_len - pos);
1487                         usbtouch->buf_len = buf_len - pos;
1488                         return;
1489                 }
1490                 pos += pkt_len;
1491         }
1492
1493 out_flush_buf:
1494         usbtouch->buf_len = 0;
1495         return;
1496 }
1497 #endif
1498
1499
1500 static void usbtouch_irq(struct urb *urb)
1501 {
1502         struct usbtouch_usb *usbtouch = urb->context;
1503         struct device *dev = &usbtouch->interface->dev;
1504         int retval;
1505
1506         switch (urb->status) {
1507         case 0:
1508                 /* success */
1509                 break;
1510         case -ETIME:
1511                 /* this urb is timing out */
1512                 dev_dbg(dev,
1513                         "%s - urb timed out - was the device unplugged?\n",
1514                         __func__);
1515                 return;
1516         case -ECONNRESET:
1517         case -ENOENT:
1518         case -ESHUTDOWN:
1519         case -EPIPE:
1520                 /* this urb is terminated, clean up */
1521                 dev_dbg(dev, "%s - urb shutting down with status: %d\n",
1522                         __func__, urb->status);
1523                 return;
1524         default:
1525                 dev_dbg(dev, "%s - nonzero urb status received: %d\n",
1526                         __func__, urb->status);
1527                 goto exit;
1528         }
1529
1530         usbtouch->type->process_pkt(usbtouch, usbtouch->data, urb->actual_length);
1531
1532 exit:
1533         usb_mark_last_busy(interface_to_usbdev(usbtouch->interface));
1534         retval = usb_submit_urb(urb, GFP_ATOMIC);
1535         if (retval)
1536                 dev_err(dev, "%s - usb_submit_urb failed with result: %d\n",
1537                         __func__, retval);
1538 }
1539
1540 static int usbtouch_open(struct input_dev *input)
1541 {
1542         struct usbtouch_usb *usbtouch = input_get_drvdata(input);
1543         int r;
1544
1545         usbtouch->irq->dev = interface_to_usbdev(usbtouch->interface);
1546
1547         r = usb_autopm_get_interface(usbtouch->interface) ? -EIO : 0;
1548         if (r < 0)
1549                 goto out;
1550
1551         mutex_lock(&usbtouch->pm_mutex);
1552         if (!usbtouch->type->irq_always) {
1553                 if (usb_submit_urb(usbtouch->irq, GFP_KERNEL)) {
1554                         r = -EIO;
1555                         goto out_put;
1556                 }
1557         }
1558
1559         usbtouch->interface->needs_remote_wakeup = 1;
1560         usbtouch->is_open = true;
1561 out_put:
1562         mutex_unlock(&usbtouch->pm_mutex);
1563         usb_autopm_put_interface(usbtouch->interface);
1564 out:
1565         return r;
1566 }
1567
1568 static void usbtouch_close(struct input_dev *input)
1569 {
1570         struct usbtouch_usb *usbtouch = input_get_drvdata(input);
1571         int r;
1572
1573         mutex_lock(&usbtouch->pm_mutex);
1574         if (!usbtouch->type->irq_always)
1575                 usb_kill_urb(usbtouch->irq);
1576         usbtouch->is_open = false;
1577         mutex_unlock(&usbtouch->pm_mutex);
1578
1579         r = usb_autopm_get_interface(usbtouch->interface);
1580         usbtouch->interface->needs_remote_wakeup = 0;
1581         if (!r)
1582                 usb_autopm_put_interface(usbtouch->interface);
1583 }
1584
1585 static int usbtouch_suspend
1586 (struct usb_interface *intf, pm_message_t message)
1587 {
1588         struct usbtouch_usb *usbtouch = usb_get_intfdata(intf);
1589
1590         usb_kill_urb(usbtouch->irq);
1591
1592         return 0;
1593 }
1594
1595 static int usbtouch_resume(struct usb_interface *intf)
1596 {
1597         struct usbtouch_usb *usbtouch = usb_get_intfdata(intf);
1598         int result = 0;
1599
1600         mutex_lock(&usbtouch->pm_mutex);
1601         if (usbtouch->is_open || usbtouch->type->irq_always)
1602                 result = usb_submit_urb(usbtouch->irq, GFP_NOIO);
1603         mutex_unlock(&usbtouch->pm_mutex);
1604
1605         return result;
1606 }
1607
1608 static int usbtouch_reset_resume(struct usb_interface *intf)
1609 {
1610         struct usbtouch_usb *usbtouch = usb_get_intfdata(intf);
1611         int err = 0;
1612
1613         /* reinit the device */
1614         if (usbtouch->type->init) {
1615                 err = usbtouch->type->init(usbtouch);
1616                 if (err) {
1617                         dev_dbg(&intf->dev,
1618                                 "%s - type->init() failed, err: %d\n",
1619                                 __func__, err);
1620                         return err;
1621                 }
1622         }
1623
1624         /* restart IO if needed */
1625         mutex_lock(&usbtouch->pm_mutex);
1626         if (usbtouch->is_open)
1627                 err = usb_submit_urb(usbtouch->irq, GFP_NOIO);
1628         mutex_unlock(&usbtouch->pm_mutex);
1629
1630         return err;
1631 }
1632
1633 static void usbtouch_free_buffers(struct usb_device *udev,
1634                                   struct usbtouch_usb *usbtouch)
1635 {
1636         usb_free_coherent(udev, usbtouch->data_size,
1637                           usbtouch->data, usbtouch->data_dma);
1638         kfree(usbtouch->buffer);
1639 }
1640
1641 static struct usb_endpoint_descriptor *
1642 usbtouch_get_input_endpoint(struct usb_host_interface *interface)
1643 {
1644         int i;
1645
1646         for (i = 0; i < interface->desc.bNumEndpoints; i++)
1647                 if (usb_endpoint_dir_in(&interface->endpoint[i].desc))
1648                         return &interface->endpoint[i].desc;
1649
1650         return NULL;
1651 }
1652
1653 static int usbtouch_probe(struct usb_interface *intf,
1654                           const struct usb_device_id *id)
1655 {
1656         struct usbtouch_usb *usbtouch;
1657         struct input_dev *input_dev;
1658         struct usb_endpoint_descriptor *endpoint;
1659         struct usb_device *udev = interface_to_usbdev(intf);
1660         struct usbtouch_device_info *type;
1661         int err = -ENOMEM;
1662
1663         /* some devices are ignored */
1664         if (id->driver_info == DEVTYPE_IGNORE)
1665                 return -ENODEV;
1666
1667         endpoint = usbtouch_get_input_endpoint(intf->cur_altsetting);
1668         if (!endpoint)
1669                 return -ENXIO;
1670
1671         usbtouch = kzalloc(sizeof(struct usbtouch_usb), GFP_KERNEL);
1672         input_dev = input_allocate_device();
1673         if (!usbtouch || !input_dev)
1674                 goto out_free;
1675
1676         mutex_init(&usbtouch->pm_mutex);
1677
1678         type = &usbtouch_dev_info[id->driver_info];
1679         usbtouch->type = type;
1680         if (!type->process_pkt)
1681                 type->process_pkt = usbtouch_process_pkt;
1682
1683         usbtouch->data_size = type->rept_size;
1684         if (type->get_pkt_len) {
1685                 /*
1686                  * When dealing with variable-length packets we should
1687                  * not request more than wMaxPacketSize bytes at once
1688                  * as we do not know if there is more data coming or
1689                  * we filled exactly wMaxPacketSize bytes and there is
1690                  * nothing else.
1691                  */
1692                 usbtouch->data_size = min(usbtouch->data_size,
1693                                           usb_endpoint_maxp(endpoint));
1694         }
1695
1696         usbtouch->data = usb_alloc_coherent(udev, usbtouch->data_size,
1697                                             GFP_KERNEL, &usbtouch->data_dma);
1698         if (!usbtouch->data)
1699                 goto out_free;
1700
1701         if (type->get_pkt_len) {
1702                 usbtouch->buffer = kmalloc(type->rept_size, GFP_KERNEL);
1703                 if (!usbtouch->buffer)
1704                         goto out_free_buffers;
1705         }
1706
1707         usbtouch->irq = usb_alloc_urb(0, GFP_KERNEL);
1708         if (!usbtouch->irq) {
1709                 dev_dbg(&intf->dev,
1710                         "%s - usb_alloc_urb failed: usbtouch->irq\n", __func__);
1711                 goto out_free_buffers;
1712         }
1713
1714         usbtouch->interface = intf;
1715         usbtouch->input = input_dev;
1716
1717         if (udev->manufacturer)
1718                 strlcpy(usbtouch->name, udev->manufacturer, sizeof(usbtouch->name));
1719
1720         if (udev->product) {
1721                 if (udev->manufacturer)
1722                         strlcat(usbtouch->name, " ", sizeof(usbtouch->name));
1723                 strlcat(usbtouch->name, udev->product, sizeof(usbtouch->name));
1724         }
1725
1726         if (!strlen(usbtouch->name))
1727                 snprintf(usbtouch->name, sizeof(usbtouch->name),
1728                         "USB Touchscreen %04x:%04x",
1729                          le16_to_cpu(udev->descriptor.idVendor),
1730                          le16_to_cpu(udev->descriptor.idProduct));
1731
1732         usb_make_path(udev, usbtouch->phys, sizeof(usbtouch->phys));
1733         strlcat(usbtouch->phys, "/input0", sizeof(usbtouch->phys));
1734
1735         input_dev->name = usbtouch->name;
1736         input_dev->phys = usbtouch->phys;
1737         usb_to_input_id(udev, &input_dev->id);
1738         input_dev->dev.parent = &intf->dev;
1739
1740         input_set_drvdata(input_dev, usbtouch);
1741
1742         input_dev->open = usbtouch_open;
1743         input_dev->close = usbtouch_close;
1744
1745         input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
1746         input_dev->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH);
1747         input_set_abs_params(input_dev, ABS_X, type->min_xc, type->max_xc, 0, 0);
1748         input_set_abs_params(input_dev, ABS_Y, type->min_yc, type->max_yc, 0, 0);
1749         if (type->max_press)
1750                 input_set_abs_params(input_dev, ABS_PRESSURE, type->min_press,
1751                                      type->max_press, 0, 0);
1752
1753         if (usb_endpoint_type(endpoint) == USB_ENDPOINT_XFER_INT)
1754                 usb_fill_int_urb(usbtouch->irq, udev,
1755                          usb_rcvintpipe(udev, endpoint->bEndpointAddress),
1756                          usbtouch->data, usbtouch->data_size,
1757                          usbtouch_irq, usbtouch, endpoint->bInterval);
1758         else
1759                 usb_fill_bulk_urb(usbtouch->irq, udev,
1760                          usb_rcvbulkpipe(udev, endpoint->bEndpointAddress),
1761                          usbtouch->data, usbtouch->data_size,
1762                          usbtouch_irq, usbtouch);
1763
1764         usbtouch->irq->dev = udev;
1765         usbtouch->irq->transfer_dma = usbtouch->data_dma;
1766         usbtouch->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1767
1768         /* device specific allocations */
1769         if (type->alloc) {
1770                 err = type->alloc(usbtouch);
1771                 if (err) {
1772                         dev_dbg(&intf->dev,
1773                                 "%s - type->alloc() failed, err: %d\n",
1774                                 __func__, err);
1775                         goto out_free_urb;
1776                 }
1777         }
1778
1779         /* device specific initialisation*/
1780         if (type->init) {
1781                 err = type->init(usbtouch);
1782                 if (err) {
1783                         dev_dbg(&intf->dev,
1784                                 "%s - type->init() failed, err: %d\n",
1785                                 __func__, err);
1786                         goto out_do_exit;
1787                 }
1788         }
1789
1790         err = input_register_device(usbtouch->input);
1791         if (err) {
1792                 dev_dbg(&intf->dev,
1793                         "%s - input_register_device failed, err: %d\n",
1794                         __func__, err);
1795                 goto out_do_exit;
1796         }
1797
1798         usb_set_intfdata(intf, usbtouch);
1799
1800         if (usbtouch->type->irq_always) {
1801                 /* this can't fail */
1802                 usb_autopm_get_interface(intf);
1803                 err = usb_submit_urb(usbtouch->irq, GFP_KERNEL);
1804                 if (err) {
1805                         usb_autopm_put_interface(intf);
1806                         dev_err(&intf->dev,
1807                                 "%s - usb_submit_urb failed with result: %d\n",
1808                                 __func__, err);
1809                         goto out_unregister_input;
1810                 }
1811         }
1812
1813         return 0;
1814
1815 out_unregister_input:
1816         input_unregister_device(input_dev);
1817         input_dev = NULL;
1818 out_do_exit:
1819         if (type->exit)
1820                 type->exit(usbtouch);
1821 out_free_urb:
1822         usb_free_urb(usbtouch->irq);
1823 out_free_buffers:
1824         usbtouch_free_buffers(udev, usbtouch);
1825 out_free:
1826         input_free_device(input_dev);
1827         kfree(usbtouch);
1828         return err;
1829 }
1830
1831 static void usbtouch_disconnect(struct usb_interface *intf)
1832 {
1833         struct usbtouch_usb *usbtouch = usb_get_intfdata(intf);
1834
1835         if (!usbtouch)
1836                 return;
1837
1838         dev_dbg(&intf->dev,
1839                 "%s - usbtouch is initialized, cleaning up\n", __func__);
1840
1841         usb_set_intfdata(intf, NULL);
1842         /* this will stop IO via close */
1843         input_unregister_device(usbtouch->input);
1844         usb_free_urb(usbtouch->irq);
1845         if (usbtouch->type->exit)
1846                 usbtouch->type->exit(usbtouch);
1847         usbtouch_free_buffers(interface_to_usbdev(intf), usbtouch);
1848         kfree(usbtouch);
1849 }
1850
1851 MODULE_DEVICE_TABLE(usb, usbtouch_devices);
1852
1853 static struct usb_driver usbtouch_driver = {
1854         .name           = "usbtouchscreen",
1855         .probe          = usbtouch_probe,
1856         .disconnect     = usbtouch_disconnect,
1857         .suspend        = usbtouch_suspend,
1858         .resume         = usbtouch_resume,
1859         .reset_resume   = usbtouch_reset_resume,
1860         .id_table       = usbtouch_devices,
1861         .supports_autosuspend = 1,
1862 };
1863
1864 module_usb_driver(usbtouch_driver);
1865
1866 MODULE_AUTHOR("Daniel Ritz <daniel.ritz@gmx.ch>");
1867 MODULE_DESCRIPTION("USB Touchscreen Driver");
1868 MODULE_LICENSE("GPL");
1869
1870 MODULE_ALIAS("touchkitusb");
1871 MODULE_ALIAS("itmtouch");
1872 MODULE_ALIAS("mtouchusb");