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