kernel/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
  58
  59 #define DRIVER_VERSION          "v0.6"
  60 #define DRIVER_AUTHOR           "Daniel Ritz <daniel.ritz@gmx.ch>"
  61 #define DRIVER_DESC             "USB Touchscreen Driver"
  62
  63 static bool swap_xy;
  64 module_param(swap_xy, bool, 0644);
  65 MODULE_PARM_DESC(swap_xy, "If set X and Y axes are swapped.");
  66
  67 static bool hwcalib_xy;
  68 module_param(hwcalib_xy, bool, 0644);
  69 MODULE_PARM_DESC(hwcalib_xy, "If set hw-calibrated X/Y are used if available");
  70
  71 /* device specifc data/functions */
  72 struct usbtouch_usb;
  73 struct usbtouch_device_info {
  74         int min_xc, max_xc;
  75         int min_yc, max_yc;
  76         int min_press, max_press;
  77         int rept_size;
  78
  79         /*
  80          * Always service the USB devices irq not just when the input device is
  81          * open. This is useful when devices have a watchdog which prevents us
  82          * from periodically polling the device. Leave this unset unless your
  83          * touchscreen device requires it, as it does consume more of the USB
  84          * bandwidth.
  85          */
  86         bool irq_always;
  87
  88         void (*process_pkt) (struct usbtouch_usb *usbtouch, unsigned char *pkt, int len);
  89
  90         /*
  91          * used to get the packet len. possible return values:
  92          * > 0: packet len
  93          * = 0: skip one byte
  94          * < 0: -return value more bytes needed
  95          */
  96         int  (*get_pkt_len) (unsigned char *pkt, int len);
  97
  98         int  (*read_data)   (struct usbtouch_usb *usbtouch, unsigned char *pkt);
  99         int  (*alloc)       (struct usbtouch_usb *usbtouch);
 100         int  (*init)        (struct usbtouch_usb *usbtouch);
 101         void (*exit)        (struct usbtouch_usb *usbtouch);
 102 };
 103
 104 /* a usbtouch device */
 105 struct usbtouch_usb {
 106         unsigned char *data;
 107         dma_addr_t data_dma;
 108         int data_size;
 109         unsigned char *buffer;
 110         int buf_len;
 111         struct urb *irq;
 112         struct usb_interface *interface;
 113         struct input_dev *input;
 114         struct usbtouch_device_info *type;
 115         char name[128];
 116         char phys[64];
 117         void *priv;
 118
 119         int x, y;
 120         int touch, press;
 121 };
 122
 123
 124 /* device types */
 125 enum {
 126         DEVTYPE_IGNORE = -1,
 127         DEVTYPE_EGALAX,
 128         DEVTYPE_PANJIT,
 129         DEVTYPE_3M,
 130         DEVTYPE_ITM,
 131         DEVTYPE_ETURBO,
 132         DEVTYPE_GUNZE,
 133         DEVTYPE_DMC_TSC10,
 134         DEVTYPE_IRTOUCH,
 135         DEVTYPE_IRTOUCH_HIRES,
 136         DEVTYPE_IDEALTEK,
 137         DEVTYPE_GENERAL_TOUCH,
 138         DEVTYPE_GOTOP,
 139         DEVTYPE_JASTEC,
 140         DEVTYPE_E2I,
 141         DEVTYPE_ZYTRONIC,
 142         DEVTYPE_TC45USB,
 143         DEVTYPE_NEXIO,
 144         DEVTYPE_ELO,
 145         DEVTYPE_ETOUCH,
 146 };
 147
 148 #define USB_DEVICE_HID_CLASS(vend, prod) \
 149         .match_flags = USB_DEVICE_ID_MATCH_INT_CLASS \
 150                 | USB_DEVICE_ID_MATCH_DEVICE, \
 151         .idVendor = (vend), \
 152         .idProduct = (prod), \
 153         .bInterfaceClass = USB_INTERFACE_CLASS_HID
 154
 155 static const struct usb_device_id usbtouch_devices[] = {
 156 #ifdef CONFIG_TOUCHSCREEN_USB_EGALAX
 157         /* ignore the HID capable devices, handled by usbhid */
 158         {USB_DEVICE_HID_CLASS(0x0eef, 0x0001), .driver_info = DEVTYPE_IGNORE},
 159         {USB_DEVICE_HID_CLASS(0x0eef, 0x0002), .driver_info = DEVTYPE_IGNORE},
 160
 161         /* normal device IDs */
 162         {USB_DEVICE(0x3823, 0x0001), .driver_info = DEVTYPE_EGALAX},
 163         {USB_DEVICE(0x3823, 0x0002), .driver_info = DEVTYPE_EGALAX},
 164         {USB_DEVICE(0x0123, 0x0001), .driver_info = DEVTYPE_EGALAX},
 165         {USB_DEVICE(0x0eef, 0x0001), .driver_info = DEVTYPE_EGALAX},
 166         {USB_DEVICE(0x0eef, 0x0002), .driver_info = DEVTYPE_EGALAX},
 167         {USB_DEVICE(0x1234, 0x0001), .driver_info = DEVTYPE_EGALAX},
 168         {USB_DEVICE(0x1234, 0x0002), .driver_info = DEVTYPE_EGALAX},
 169 #endif
 170
 171 #ifdef CONFIG_TOUCHSCREEN_USB_PANJIT
 172         {USB_DEVICE(0x134c, 0x0001), .driver_info = DEVTYPE_PANJIT},
 173         {USB_DEVICE(0x134c, 0x0002), .driver_info = DEVTYPE_PANJIT},
 174         {USB_DEVICE(0x134c, 0x0003), .driver_info = DEVTYPE_PANJIT},
 175         {USB_DEVICE(0x134c, 0x0004), .driver_info = DEVTYPE_PANJIT},
 176 #endif
 177
 178 #ifdef CONFIG_TOUCHSCREEN_USB_3M
 179         {USB_DEVICE(0x0596, 0x0001), .driver_info = DEVTYPE_3M},
 180 #endif
 181
 182 #ifdef CONFIG_TOUCHSCREEN_USB_ITM
 183         {USB_DEVICE(0x0403, 0xf9e9), .driver_info = DEVTYPE_ITM},
 184         {USB_DEVICE(0x16e3, 0xf9e9), .driver_info = DEVTYPE_ITM},
 185 #endif
 186
 187 #ifdef CONFIG_TOUCHSCREEN_USB_ETURBO
 188         {USB_DEVICE(0x1234, 0x5678), .driver_info = DEVTYPE_ETURBO},
 189 #endif
 190
 191 #ifdef CONFIG_TOUCHSCREEN_USB_GUNZE
 192         {USB_DEVICE(0x0637, 0x0001), .driver_info = DEVTYPE_GUNZE},
 193 #endif
 194
 195 #ifdef CONFIG_TOUCHSCREEN_USB_DMC_TSC10
 196         {USB_DEVICE(0x0afa, 0x03e8), .driver_info = DEVTYPE_DMC_TSC10},
 197 #endif
 198
 199 #ifdef CONFIG_TOUCHSCREEN_USB_IRTOUCH
 200         {USB_DEVICE(0x595a, 0x0001), .driver_info = DEVTYPE_IRTOUCH},
 201         {USB_DEVICE(0x6615, 0x0001), .driver_info = DEVTYPE_IRTOUCH},
 202         {USB_DEVICE(0x6615, 0x0012), .driver_info = DEVTYPE_IRTOUCH_HIRES},
 203 #endif
 204
 205 #ifdef CONFIG_TOUCHSCREEN_USB_IDEALTEK
 206         {USB_DEVICE(0x1391, 0x1000), .driver_info = DEVTYPE_IDEALTEK},
 207 #endif
 208
 209 #ifdef CONFIG_TOUCHSCREEN_USB_GENERAL_TOUCH
 210         {USB_DEVICE(0x0dfc, 0x0001), .driver_info = DEVTYPE_GENERAL_TOUCH},
 211 #endif
 212
 213 #ifdef CONFIG_TOUCHSCREEN_USB_GOTOP
 214         {USB_DEVICE(0x08f2, 0x007f), .driver_info = DEVTYPE_GOTOP},
 215         {USB_DEVICE(0x08f2, 0x00ce), .driver_info = DEVTYPE_GOTOP},
 216         {USB_DEVICE(0x08f2, 0x00f4), .driver_info = DEVTYPE_GOTOP},
 217 #endif
 218
 219 #ifdef CONFIG_TOUCHSCREEN_USB_JASTEC
 220         {USB_DEVICE(0x0f92, 0x0001), .driver_info = DEVTYPE_JASTEC},
 221 #endif
 222
 223 #ifdef CONFIG_TOUCHSCREEN_USB_E2I
 224         {USB_DEVICE(0x1ac7, 0x0001), .driver_info = DEVTYPE_E2I},
 225 #endif
 226
 227 #ifdef CONFIG_TOUCHSCREEN_USB_ZYTRONIC
 228         {USB_DEVICE(0x14c8, 0x0003), .driver_info = DEVTYPE_ZYTRONIC},
 229 #endif
 230
 231 #ifdef CONFIG_TOUCHSCREEN_USB_ETT_TC45USB
 232         /* TC5UH */
 233         {USB_DEVICE(0x0664, 0x0309), .driver_info = DEVTYPE_TC45USB},
 234         /* TC4UM */
 235         {USB_DEVICE(0x0664, 0x0306), .driver_info = DEVTYPE_TC45USB},
 236 #endif
 237
 238 #ifdef CONFIG_TOUCHSCREEN_USB_NEXIO
 239         /* data interface only */
 240         {USB_DEVICE_AND_INTERFACE_INFO(0x10f0, 0x2002, 0x0a, 0x00, 0x00),
 241                 .driver_info = DEVTYPE_NEXIO},
 242         {USB_DEVICE_AND_INTERFACE_INFO(0x1870, 0x0001, 0x0a, 0x00, 0x00),
 243                 .driver_info = DEVTYPE_NEXIO},
 244 #endif
 245
 246 #ifdef CONFIG_TOUCHSCREEN_USB_ELO
 247         {USB_DEVICE(0x04e7, 0x0020), .driver_info = DEVTYPE_ELO},
 248 #endif
 249
 250 #ifdef CONFIG_TOUCHSCREEN_USB_EASYTOUCH
 251         {USB_DEVICE(0x7374, 0x0001), .driver_info = DEVTYPE_ETOUCH},
 252 #endif
 253
 254         {}
 255 };
 256
 257
 258 /*****************************************************************************
 259  * e2i Part
 260  */
 261
 262 #ifdef CONFIG_TOUCHSCREEN_USB_E2I
 263 static int e2i_init(struct usbtouch_usb *usbtouch)
 264 {
 265         int ret;
 266         struct usb_device *udev = interface_to_usbdev(usbtouch->interface);
 267
 268         ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
 269                               0x01, 0x02, 0x0000, 0x0081,
 270                               NULL, 0, USB_CTRL_SET_TIMEOUT);
 271
 272         dev_dbg(&usbtouch->interface->dev,
 273                 "%s - usb_control_msg - E2I_RESET - bytes|err: %d\n",
 274                 __func__, ret);
 275         return ret;
 276 }
 277
 278 static int e2i_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 279 {
 280         int tmp = (pkt[0] << 8) | pkt[1];
 281         dev->x  = (pkt[2] << 8) | pkt[3];
 282         dev->y  = (pkt[4] << 8) | pkt[5];
 283
 284         tmp = tmp - 0xA000;
 285         dev->touch = (tmp > 0);
 286         dev->press = (tmp > 0 ? tmp : 0);
 287
 288         return 1;
 289 }
 290 #endif
 291
 292
 293 /*****************************************************************************
 294  * eGalax part
 295  */
 296
 297 #ifdef CONFIG_TOUCHSCREEN_USB_EGALAX
 298
 299 #ifndef MULTI_PACKET
 300 #define MULTI_PACKET
 301 #endif
 302
 303 #define EGALAX_PKT_TYPE_MASK            0xFE
 304 #define EGALAX_PKT_TYPE_REPT            0x80
 305 #define EGALAX_PKT_TYPE_DIAG            0x0A
 306
 307 static int egalax_init(struct usbtouch_usb *usbtouch)
 308 {
 309         int ret, i;
 310         unsigned char *buf;
 311         struct usb_device *udev = interface_to_usbdev(usbtouch->interface);
 312
 313         /*
 314          * An eGalax diagnostic packet kicks the device into using the right
 315          * protocol.  We send a "check active" packet.  The response will be
 316          * read later and ignored.
 317          */
 318
 319         buf = kmalloc(3, GFP_KERNEL);
 320         if (!buf)
 321                 return -ENOMEM;
 322
 323         buf[0] = EGALAX_PKT_TYPE_DIAG;
 324         buf[1] = 1;     /* length */
 325         buf[2] = 'A';   /* command - check active */
 326
 327         for (i = 0; i < 3; i++) {
 328                 ret = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
 329                                       0,
 330                                       USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 331                                       0, 0, buf, 3,
 332                                       USB_CTRL_SET_TIMEOUT);
 333                 if (ret >= 0) {
 334                         ret = 0;
 335                         break;
 336                 }
 337                 if (ret != -EPIPE)
 338                         break;
 339         }
 340
 341         kfree(buf);
 342
 343         return ret;
 344 }
 345
 346 static int egalax_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 347 {
 348         if ((pkt[0] & EGALAX_PKT_TYPE_MASK) != EGALAX_PKT_TYPE_REPT)
 349                 return 0;
 350
 351         dev->x = ((pkt[3] & 0x0F) << 7) | (pkt[4] & 0x7F);
 352         dev->y = ((pkt[1] & 0x0F) << 7) | (pkt[2] & 0x7F);
 353         dev->touch = pkt[0] & 0x01;
 354
 355         return 1;
 356 }
 357
 358 static int egalax_get_pkt_len(unsigned char *buf, int len)
 359 {
 360         switch (buf[0] & EGALAX_PKT_TYPE_MASK) {
 361         case EGALAX_PKT_TYPE_REPT:
 362                 return 5;
 363
 364         case EGALAX_PKT_TYPE_DIAG:
 365                 if (len < 2)
 366                         return -1;
 367
 368                 return buf[1] + 2;
 369         }
 370
 371         return 0;
 372 }
 373 #endif
 374
 375 /*****************************************************************************
 376  * EasyTouch part
 377  */
 378
 379 #ifdef CONFIG_TOUCHSCREEN_USB_EASYTOUCH
 380
 381 #ifndef MULTI_PACKET
 382 #define MULTI_PACKET
 383 #endif
 384
 385 #define ETOUCH_PKT_TYPE_MASK            0xFE
 386 #define ETOUCH_PKT_TYPE_REPT            0x80
 387 #define ETOUCH_PKT_TYPE_REPT2           0xB0
 388 #define ETOUCH_PKT_TYPE_DIAG            0x0A
 389
 390 static int etouch_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 391 {
 392         if ((pkt[0] & ETOUCH_PKT_TYPE_MASK) != ETOUCH_PKT_TYPE_REPT &&
 393                 (pkt[0] & ETOUCH_PKT_TYPE_MASK) != ETOUCH_PKT_TYPE_REPT2)
 394                 return 0;
 395
 396         dev->x = ((pkt[1] & 0x1F) << 7) | (pkt[2] & 0x7F);
 397         dev->y = ((pkt[3] & 0x1F) << 7) | (pkt[4] & 0x7F);
 398         dev->touch = pkt[0] & 0x01;
 399
 400         return 1;
 401 }
 402
 403 static int etouch_get_pkt_len(unsigned char *buf, int len)
 404 {
 405         switch (buf[0] & ETOUCH_PKT_TYPE_MASK) {
 406         case ETOUCH_PKT_TYPE_REPT:
 407         case ETOUCH_PKT_TYPE_REPT2:
 408                 return 5;
 409
 410         case ETOUCH_PKT_TYPE_DIAG:
 411                 if (len < 2)
 412                         return -1;
 413
 414                 return buf[1] + 2;
 415         }
 416
 417         return 0;
 418 }
 419 #endif
 420
 421 /*****************************************************************************
 422  * PanJit Part
 423  */
 424 #ifdef CONFIG_TOUCHSCREEN_USB_PANJIT
 425 static int panjit_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 426 {
 427         dev->x = ((pkt[2] & 0x0F) << 8) | pkt[1];
 428         dev->y = ((pkt[4] & 0x0F) << 8) | pkt[3];
 429         dev->touch = pkt[0] & 0x01;
 430
 431         return 1;
 432 }
 433 #endif
 434
 435
 436 /*****************************************************************************
 437  * 3M/Microtouch Part
 438  */
 439 #ifdef CONFIG_TOUCHSCREEN_USB_3M
 440
 441 #define MTOUCHUSB_ASYNC_REPORT          1
 442 #define MTOUCHUSB_RESET                 7
 443 #define MTOUCHUSB_REQ_CTRLLR_ID         10
 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 static int mtouch_init(struct usbtouch_usb *usbtouch)
 460 {
 461         int ret, i;
 462         struct usb_device *udev = interface_to_usbdev(usbtouch->interface);
 463
 464         ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
 465                               MTOUCHUSB_RESET,
 466                               USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 467                               1, 0, NULL, 0, USB_CTRL_SET_TIMEOUT);
 468         dev_dbg(&usbtouch->interface->dev,
 469                 "%s - usb_control_msg - MTOUCHUSB_RESET - bytes|err: %d\n",
 470                 __func__, ret);
 471         if (ret < 0)
 472                 return ret;
 473         msleep(150);
 474
 475         for (i = 0; i < 3; i++) {
 476                 ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
 477                                       MTOUCHUSB_ASYNC_REPORT,
 478                                       USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 479                                       1, 1, NULL, 0, USB_CTRL_SET_TIMEOUT);
 480                 dev_dbg(&usbtouch->interface->dev,
 481                         "%s - usb_control_msg - MTOUCHUSB_ASYNC_REPORT - bytes|err: %d\n",
 482                         __func__, ret);
 483                 if (ret >= 0)
 484                         break;
 485                 if (ret != -EPIPE)
 486                         return ret;
 487         }
 488
 489         /* Default min/max xy are the raw values, override if using hw-calib */
 490         if (hwcalib_xy) {
 491                 input_set_abs_params(usbtouch->input, ABS_X, 0, 0xffff, 0, 0);
 492                 input_set_abs_params(usbtouch->input, ABS_Y, 0, 0xffff, 0, 0);
 493         }
 494
 495         return 0;
 496 }
 497 #endif
 498
 499
 500 /*****************************************************************************
 501  * ITM Part
 502  */
 503 #ifdef CONFIG_TOUCHSCREEN_USB_ITM
 504 static int itm_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 505 {
 506         int touch;
 507         /*
 508          * ITM devices report invalid x/y data if not touched.
 509          * if the screen was touched before but is not touched any more
 510          * report touch as 0 with the last valid x/y data once. then stop
 511          * reporting data until touched again.
 512          */
 513         dev->press = ((pkt[2] & 0x01) << 7) | (pkt[5] & 0x7F);
 514
 515         touch = ~pkt[7] & 0x20;
 516         if (!touch) {
 517                 if (dev->touch) {
 518                         dev->touch = 0;
 519                         return 1;
 520                 }
 521
 522                 return 0;
 523         }
 524
 525         dev->x = ((pkt[0] & 0x1F) << 7) | (pkt[3] & 0x7F);
 526         dev->y = ((pkt[1] & 0x1F) << 7) | (pkt[4] & 0x7F);
 527         dev->touch = touch;
 528
 529         return 1;
 530 }
 531 #endif
 532
 533
 534 /*****************************************************************************
 535  * eTurboTouch part
 536  */
 537 #ifdef CONFIG_TOUCHSCREEN_USB_ETURBO
 538 #ifndef MULTI_PACKET
 539 #define MULTI_PACKET
 540 #endif
 541 static int eturbo_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 542 {
 543         unsigned int shift;
 544
 545         /* packets should start with sync */
 546         if (!(pkt[0] & 0x80))
 547                 return 0;
 548
 549         shift = (6 - (pkt[0] & 0x03));
 550         dev->x = ((pkt[3] << 7) | pkt[4]) >> shift;
 551         dev->y = ((pkt[1] << 7) | pkt[2]) >> shift;
 552         dev->touch = (pkt[0] & 0x10) ? 1 : 0;
 553
 554         return 1;
 555 }
 556
 557 static int eturbo_get_pkt_len(unsigned char *buf, int len)
 558 {
 559         if (buf[0] & 0x80)
 560                 return 5;
 561         if (buf[0] == 0x01)
 562                 return 3;
 563         return 0;
 564 }
 565 #endif
 566
 567
 568 /*****************************************************************************
 569  * Gunze part
 570  */
 571 #ifdef CONFIG_TOUCHSCREEN_USB_GUNZE
 572 static int gunze_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 573 {
 574         if (!(pkt[0] & 0x80) || ((pkt[1] | pkt[2] | pkt[3]) & 0x80))
 575                 return 0;
 576
 577         dev->x = ((pkt[0] & 0x1F) << 7) | (pkt[2] & 0x7F);
 578         dev->y = ((pkt[1] & 0x1F) << 7) | (pkt[3] & 0x7F);
 579         dev->touch = pkt[0] & 0x20;
 580
 581         return 1;
 582 }
 583 #endif
 584
 585 /*****************************************************************************
 586  * DMC TSC-10/25 Part
 587  *
 588  * Documentation about the controller and it's protocol can be found at
 589  *   http://www.dmccoltd.com/files/controler/tsc10usb_pi_e.pdf
 590  *   http://www.dmccoltd.com/files/controler/tsc25_usb_e.pdf
 591  */
 592 #ifdef CONFIG_TOUCHSCREEN_USB_DMC_TSC10
 593
 594 /* supported data rates. currently using 130 */
 595 #define TSC10_RATE_POINT        0x50
 596 #define TSC10_RATE_30           0x40
 597 #define TSC10_RATE_50           0x41
 598 #define TSC10_RATE_80           0x42
 599 #define TSC10_RATE_100          0x43
 600 #define TSC10_RATE_130          0x44
 601 #define TSC10_RATE_150          0x45
 602
 603 /* commands */
 604 #define TSC10_CMD_RESET         0x55
 605 #define TSC10_CMD_RATE          0x05
 606 #define TSC10_CMD_DATA1         0x01
 607
 608 static int dmc_tsc10_init(struct usbtouch_usb *usbtouch)
 609 {
 610         struct usb_device *dev = interface_to_usbdev(usbtouch->interface);
 611         int ret = -ENOMEM;
 612         unsigned char *buf;
 613
 614         buf = kmalloc(2, GFP_NOIO);
 615         if (!buf)
 616                 goto err_nobuf;
 617         /* reset */
 618         buf[0] = buf[1] = 0xFF;
 619         ret = usb_control_msg(dev, usb_rcvctrlpipe (dev, 0),
 620                               TSC10_CMD_RESET,
 621                               USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 622                               0, 0, buf, 2, USB_CTRL_SET_TIMEOUT);
 623         if (ret < 0)
 624                 goto err_out;
 625         if (buf[0] != 0x06) {
 626                 ret = -ENODEV;
 627                 goto err_out;
 628         }
 629
 630         /* TSC-25 data sheet specifies a delay after the RESET command */
 631         msleep(150);
 632
 633         /* set coordinate output rate */
 634         buf[0] = buf[1] = 0xFF;
 635         ret = usb_control_msg(dev, usb_rcvctrlpipe (dev, 0),
 636                               TSC10_CMD_RATE,
 637                               USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 638                               TSC10_RATE_150, 0, buf, 2, USB_CTRL_SET_TIMEOUT);
 639         if (ret < 0)
 640                 goto err_out;
 641         if ((buf[0] != 0x06) && (buf[0] != 0x15 || buf[1] != 0x01)) {
 642                 ret = -ENODEV;
 643                 goto err_out;
 644         }
 645
 646         /* start sending data */
 647         ret = usb_control_msg(dev, usb_rcvctrlpipe (dev, 0),
 648                               TSC10_CMD_DATA1,
 649                               USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 650                               0, 0, NULL, 0, USB_CTRL_SET_TIMEOUT);
 651 err_out:
 652         kfree(buf);
 653 err_nobuf:
 654         return ret;
 655 }
 656
 657
 658 static int dmc_tsc10_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 659 {
 660         dev->x = ((pkt[2] & 0x03) << 8) | pkt[1];
 661         dev->y = ((pkt[4] & 0x03) << 8) | pkt[3];
 662         dev->touch = pkt[0] & 0x01;
 663
 664         return 1;
 665 }
 666 #endif
 667
 668
 669 /*****************************************************************************
 670  * IRTOUCH Part
 671  */
 672 #ifdef CONFIG_TOUCHSCREEN_USB_IRTOUCH
 673 static int irtouch_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 674 {
 675         dev->x = (pkt[3] << 8) | pkt[2];
 676         dev->y = (pkt[5] << 8) | pkt[4];
 677         dev->touch = (pkt[1] & 0x03) ? 1 : 0;
 678
 679         return 1;
 680 }
 681 #endif
 682
 683 /*****************************************************************************
 684  * ET&T TC5UH/TC4UM part
 685  */
 686 #ifdef CONFIG_TOUCHSCREEN_USB_ETT_TC45USB
 687 static int tc45usb_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 688 {
 689         dev->x = ((pkt[2] & 0x0F) << 8) | pkt[1];
 690         dev->y = ((pkt[4] & 0x0F) << 8) | pkt[3];
 691         dev->touch = pkt[0] & 0x01;
 692
 693         return 1;
 694 }
 695 #endif
 696
 697 /*****************************************************************************
 698  * IdealTEK URTC1000 Part
 699  */
 700 #ifdef CONFIG_TOUCHSCREEN_USB_IDEALTEK
 701 #ifndef MULTI_PACKET
 702 #define MULTI_PACKET
 703 #endif
 704 static int idealtek_get_pkt_len(unsigned char *buf, int len)
 705 {
 706         if (buf[0] & 0x80)
 707                 return 5;
 708         if (buf[0] == 0x01)
 709                 return len;
 710         return 0;
 711 }
 712
 713 static int idealtek_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 714 {
 715         switch (pkt[0] & 0x98) {
 716         case 0x88:
 717                 /* touch data in IdealTEK mode */
 718                 dev->x = (pkt[1] << 5) | (pkt[2] >> 2);
 719                 dev->y = (pkt[3] << 5) | (pkt[4] >> 2);
 720                 dev->touch = (pkt[0] & 0x40) ? 1 : 0;
 721                 return 1;
 722
 723         case 0x98:
 724                 /* touch data in MT emulation mode */
 725                 dev->x = (pkt[2] << 5) | (pkt[1] >> 2);
 726                 dev->y = (pkt[4] << 5) | (pkt[3] >> 2);
 727                 dev->touch = (pkt[0] & 0x40) ? 1 : 0;
 728                 return 1;
 729
 730         default:
 731                 return 0;
 732         }
 733 }
 734 #endif
 735
 736 /*****************************************************************************
 737  * General Touch Part
 738  */
 739 #ifdef CONFIG_TOUCHSCREEN_USB_GENERAL_TOUCH
 740 static int general_touch_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 741 {
 742         dev->x = (pkt[2] << 8) | pkt[1];
 743         dev->y = (pkt[4] << 8) | pkt[3];
 744         dev->press = pkt[5] & 0xff;
 745         dev->touch = pkt[0] & 0x01;
 746
 747         return 1;
 748 }
 749 #endif
 750
 751 /*****************************************************************************
 752  * GoTop Part
 753  */
 754 #ifdef CONFIG_TOUCHSCREEN_USB_GOTOP
 755 static int gotop_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 756 {
 757         dev->x = ((pkt[1] & 0x38) << 4) | pkt[2];
 758         dev->y = ((pkt[1] & 0x07) << 7) | pkt[3];
 759         dev->touch = pkt[0] & 0x01;
 760
 761         return 1;
 762 }
 763 #endif
 764
 765 /*****************************************************************************
 766  * JASTEC Part
 767  */
 768 #ifdef CONFIG_TOUCHSCREEN_USB_JASTEC
 769 static int jastec_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 770 {
 771         dev->x = ((pkt[0] & 0x3f) << 6) | (pkt[2] & 0x3f);
 772         dev->y = ((pkt[1] & 0x3f) << 6) | (pkt[3] & 0x3f);
 773         dev->touch = (pkt[0] & 0x40) >> 6;
 774
 775         return 1;
 776 }
 777 #endif
 778
 779 /*****************************************************************************
 780  * Zytronic Part
 781  */
 782 #ifdef CONFIG_TOUCHSCREEN_USB_ZYTRONIC
 783 static int zytronic_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 784 {
 785         struct usb_interface *intf = dev->interface;
 786
 787         switch (pkt[0]) {
 788         case 0x3A: /* command response */
 789                 dev_dbg(&intf->dev, "%s: Command response %d\n", __func__, pkt[1]);
 790                 break;
 791
 792         case 0xC0: /* down */
 793                 dev->x = (pkt[1] & 0x7f) | ((pkt[2] & 0x07) << 7);
 794                 dev->y = (pkt[3] & 0x7f) | ((pkt[4] & 0x07) << 7);
 795                 dev->touch = 1;
 796                 dev_dbg(&intf->dev, "%s: down %d,%d\n", __func__, dev->x, dev->y);
 797                 return 1;
 798
 799         case 0x80: /* up */
 800                 dev->x = (pkt[1] & 0x7f) | ((pkt[2] & 0x07) << 7);
 801                 dev->y = (pkt[3] & 0x7f) | ((pkt[4] & 0x07) << 7);
 802                 dev->touch = 0;
 803                 dev_dbg(&intf->dev, "%s: up %d,%d\n", __func__, dev->x, dev->y);
 804                 return 1;
 805
 806         default:
 807                 dev_dbg(&intf->dev, "%s: Unknown return %d\n", __func__, pkt[0]);
 808                 break;
 809         }
 810
 811         return 0;
 812 }
 813 #endif
 814
 815 /*****************************************************************************
 816  * NEXIO Part
 817  */
 818 #ifdef CONFIG_TOUCHSCREEN_USB_NEXIO
 819
 820 #define NEXIO_TIMEOUT   5000
 821 #define NEXIO_BUFSIZE   1024
 822 #define NEXIO_THRESHOLD 50
 823
 824 struct nexio_priv {
 825         struct urb *ack;
 826         unsigned char *ack_buf;
 827 };
 828
 829 struct nexio_touch_packet {
 830         u8      flags;          /* 0xe1 = touch, 0xe1 = release */
 831         __be16  data_len;       /* total bytes of touch data */
 832         __be16  x_len;          /* bytes for X axis */
 833         __be16  y_len;          /* bytes for Y axis */
 834         u8      data[];
 835 } __attribute__ ((packed));
 836
 837 static unsigned char nexio_ack_pkt[2] = { 0xaa, 0x02 };
 838 static unsigned char nexio_init_pkt[4] = { 0x82, 0x04, 0x0a, 0x0f };
 839
 840 static void nexio_ack_complete(struct urb *urb)
 841 {
 842 }
 843
 844 static int nexio_alloc(struct usbtouch_usb *usbtouch)
 845 {
 846         struct nexio_priv *priv;
 847         int ret = -ENOMEM;
 848
 849         usbtouch->priv = kmalloc(sizeof(struct nexio_priv), GFP_KERNEL);
 850         if (!usbtouch->priv)
 851                 goto out_buf;
 852
 853         priv = usbtouch->priv;
 854
 855         priv->ack_buf = kmemdup(nexio_ack_pkt, sizeof(nexio_ack_pkt),
 856                                 GFP_KERNEL);
 857         if (!priv->ack_buf)
 858                 goto err_priv;
 859
 860         priv->ack = usb_alloc_urb(0, GFP_KERNEL);
 861         if (!priv->ack) {
 862                 dev_dbg(&usbtouch->interface->dev,
 863                         "%s - usb_alloc_urb failed: usbtouch->ack\n", __func__);
 864                 goto err_ack_buf;
 865         }
 866
 867         return 0;
 868
 869 err_ack_buf:
 870         kfree(priv->ack_buf);
 871 err_priv:
 872         kfree(priv);
 873 out_buf:
 874         return ret;
 875 }
 876
 877 static int nexio_init(struct usbtouch_usb *usbtouch)
 878 {
 879         struct usb_device *dev = interface_to_usbdev(usbtouch->interface);
 880         struct usb_host_interface *interface = usbtouch->interface->cur_altsetting;
 881         struct nexio_priv *priv = usbtouch->priv;
 882         int ret = -ENOMEM;
 883         int actual_len, i;
 884         unsigned char *buf;
 885         char *firmware_ver = NULL, *device_name = NULL;
 886         int input_ep = 0, output_ep = 0;
 887
 888         /* find first input and output endpoint */
 889         for (i = 0; i < interface->desc.bNumEndpoints; i++) {
 890                 if (!input_ep &&
 891                     usb_endpoint_dir_in(&interface->endpoint[i].desc))
 892                         input_ep = interface->endpoint[i].desc.bEndpointAddress;
 893                 if (!output_ep &&
 894                     usb_endpoint_dir_out(&interface->endpoint[i].desc))
 895                         output_ep = interface->endpoint[i].desc.bEndpointAddress;
 896         }
 897         if (!input_ep || !output_ep)
 898                 return -ENXIO;
 899
 900         buf = kmalloc(NEXIO_BUFSIZE, GFP_NOIO);
 901         if (!buf)
 902                 goto out_buf;
 903
 904         /* two empty reads */
 905         for (i = 0; i < 2; i++) {
 906                 ret = usb_bulk_msg(dev, usb_rcvbulkpipe(dev, input_ep),
 907                                    buf, NEXIO_BUFSIZE, &actual_len,
 908                                    NEXIO_TIMEOUT);
 909                 if (ret < 0)
 910                         goto out_buf;
 911         }
 912
 913         /* send init command */
 914         memcpy(buf, nexio_init_pkt, sizeof(nexio_init_pkt));
 915         ret = usb_bulk_msg(dev, usb_sndbulkpipe(dev, output_ep),
 916                            buf, sizeof(nexio_init_pkt), &actual_len,
 917                            NEXIO_TIMEOUT);
 918         if (ret < 0)
 919                 goto out_buf;
 920
 921         /* read replies */
 922         for (i = 0; i < 3; i++) {
 923                 memset(buf, 0, NEXIO_BUFSIZE);
 924                 ret = usb_bulk_msg(dev, usb_rcvbulkpipe(dev, input_ep),
 925                                    buf, NEXIO_BUFSIZE, &actual_len,
 926                                    NEXIO_TIMEOUT);
 927                 if (ret < 0 || actual_len < 1 || buf[1] != actual_len)
 928                         continue;
 929                 switch (buf[0]) {
 930                 case 0x83:      /* firmware version */
 931                         if (!firmware_ver)
 932                                 firmware_ver = kstrdup(&buf[2], GFP_NOIO);
 933                         break;
 934                 case 0x84:      /* device name */
 935                         if (!device_name)
 936                                 device_name = kstrdup(&buf[2], GFP_NOIO);
 937                         break;
 938                 }
 939         }
 940
 941         printk(KERN_INFO "Nexio device: %s, firmware version: %s\n",
 942                device_name, firmware_ver);
 943
 944         kfree(firmware_ver);
 945         kfree(device_name);
 946
 947         usb_fill_bulk_urb(priv->ack, dev, usb_sndbulkpipe(dev, output_ep),
 948                           priv->ack_buf, sizeof(nexio_ack_pkt),
 949                           nexio_ack_complete, usbtouch);
 950         ret = 0;
 951
 952 out_buf:
 953         kfree(buf);
 954         return ret;
 955 }
 956
 957 static void nexio_exit(struct usbtouch_usb *usbtouch)
 958 {
 959         struct nexio_priv *priv = usbtouch->priv;
 960
 961         usb_kill_urb(priv->ack);
 962         usb_free_urb(priv->ack);
 963         kfree(priv->ack_buf);
 964         kfree(priv);
 965 }
 966
 967 static int nexio_read_data(struct usbtouch_usb *usbtouch, unsigned char *pkt)
 968 {
 969         struct nexio_touch_packet *packet = (void *) pkt;
 970         struct nexio_priv *priv = usbtouch->priv;
 971         unsigned int data_len = be16_to_cpu(packet->data_len);
 972         unsigned int x_len = be16_to_cpu(packet->x_len);
 973         unsigned int y_len = be16_to_cpu(packet->y_len);
 974         int x, y, begin_x, begin_y, end_x, end_y, w, h, ret;
 975
 976         /* got touch data? */
 977         if ((pkt[0] & 0xe0) != 0xe0)
 978                 return 0;
 979
 980         if (data_len > 0xff)
 981                 data_len -= 0x100;
 982         if (x_len > 0xff)
 983                 x_len -= 0x80;
 984
 985         /* send ACK */
 986         ret = usb_submit_urb(priv->ack, GFP_ATOMIC);
 987
 988         if (!usbtouch->type->max_xc) {
 989                 usbtouch->type->max_xc = 2 * x_len;
 990                 input_set_abs_params(usbtouch->input, ABS_X,
 991                                      0, usbtouch->type->max_xc, 0, 0);
 992                 usbtouch->type->max_yc = 2 * y_len;
 993                 input_set_abs_params(usbtouch->input, ABS_Y,
 994                                      0, usbtouch->type->max_yc, 0, 0);
 995         }
 996         /*
 997          * The device reports state of IR sensors on X and Y axes.
 998          * Each byte represents "darkness" percentage (0-100) of one element.
 999          * 17" touchscreen reports only 64 x 52 bytes so the resolution is low.
1000          * This also means that there's a limited multi-touch capability but
1001          * it's disabled (and untested) here as there's no X driver for that.
1002          */
1003         begin_x = end_x = begin_y = end_y = -1;
1004         for (x = 0; x < x_len; x++) {
1005                 if (begin_x == -1 && packet->data[x] > NEXIO_THRESHOLD) {
1006                         begin_x = x;
1007                         continue;
1008                 }
1009                 if (end_x == -1 && begin_x != -1 && packet->data[x] < NEXIO_THRESHOLD) {
1010                         end_x = x - 1;
1011                         for (y = x_len; y < data_len; y++) {
1012                                 if (begin_y == -1 && packet->data[y] > NEXIO_THRESHOLD) {
1013                                         begin_y = y - x_len;
1014                                         continue;
1015                                 }
1016                                 if (end_y == -1 &&
1017                                     begin_y != -1 && packet->data[y] < NEXIO_THRESHOLD) {
1018                                         end_y = y - 1 - x_len;
1019                                         w = end_x - begin_x;
1020                                         h = end_y - begin_y;
1021 #if 0
1022                                         /* multi-touch */
1023                                         input_report_abs(usbtouch->input,
1024                                                     ABS_MT_TOUCH_MAJOR, max(w,h));
1025                                         input_report_abs(usbtouch->input,
1026                                                     ABS_MT_TOUCH_MINOR, min(x,h));
1027                                         input_report_abs(usbtouch->input,
1028                                                     ABS_MT_POSITION_X, 2*begin_x+w);
1029                                         input_report_abs(usbtouch->input,
1030                                                     ABS_MT_POSITION_Y, 2*begin_y+h);
1031                                         input_report_abs(usbtouch->input,
1032                                                     ABS_MT_ORIENTATION, w > h);
1033                                         input_mt_sync(usbtouch->input);
1034 #endif
1035                                         /* single touch */
1036                                         usbtouch->x = 2 * begin_x + w;
1037                                         usbtouch->y = 2 * begin_y + h;
1038                                         usbtouch->touch = packet->flags & 0x01;
1039                                         begin_y = end_y = -1;
1040                                         return 1;
1041                                 }
1042                         }
1043                         begin_x = end_x = -1;
1044                 }
1045
1046         }
1047         return 0;
1048 }
1049 #endif
1050
1051
1052 /*****************************************************************************
1053  * ELO part
1054  */
1055
1056 #ifdef CONFIG_TOUCHSCREEN_USB_ELO
1057
1058 static int elo_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
1059 {
1060         dev->x = (pkt[3] << 8) | pkt[2];
1061         dev->y = (pkt[5] << 8) | pkt[4];
1062         dev->touch = pkt[6] > 0;
1063         dev->press = pkt[6];
1064
1065         return 1;
1066 }
1067 #endif
1068
1069
1070 /*****************************************************************************
1071  * the different device descriptors
1072  */
1073 #ifdef MULTI_PACKET
1074 static void usbtouch_process_multi(struct usbtouch_usb *usbtouch,
1075                                    unsigned char *pkt, int len);
1076 #endif
1077
1078 static struct usbtouch_device_info usbtouch_dev_info[] = {
1079 #ifdef CONFIG_TOUCHSCREEN_USB_ELO
1080         [DEVTYPE_ELO] = {
1081                 .min_xc         = 0x0,
1082                 .max_xc         = 0x0fff,
1083                 .min_yc         = 0x0,
1084                 .max_yc         = 0x0fff,
1085                 .max_press      = 0xff,
1086                 .rept_size      = 8,
1087                 .read_data      = elo_read_data,
1088         },
1089 #endif
1090
1091 #ifdef CONFIG_TOUCHSCREEN_USB_EGALAX
1092         [DEVTYPE_EGALAX] = {
1093                 .min_xc         = 0x0,
1094                 .max_xc         = 0x07ff,
1095                 .min_yc         = 0x0,
1096                 .max_yc         = 0x07ff,
1097                 .rept_size      = 16,
1098                 .process_pkt    = usbtouch_process_multi,
1099                 .get_pkt_len    = egalax_get_pkt_len,
1100                 .read_data      = egalax_read_data,
1101                 .init           = egalax_init,
1102         },
1103 #endif
1104
1105 #ifdef CONFIG_TOUCHSCREEN_USB_PANJIT
1106         [DEVTYPE_PANJIT] = {
1107                 .min_xc         = 0x0,
1108                 .max_xc         = 0x0fff,
1109                 .min_yc         = 0x0,
1110                 .max_yc         = 0x0fff,
1111                 .rept_size      = 8,
1112                 .read_data      = panjit_read_data,
1113         },
1114 #endif
1115
1116 #ifdef CONFIG_TOUCHSCREEN_USB_3M
1117         [DEVTYPE_3M] = {
1118                 .min_xc         = 0x0,
1119                 .max_xc         = 0x4000,
1120                 .min_yc         = 0x0,
1121                 .max_yc         = 0x4000,
1122                 .rept_size      = 11,
1123                 .read_data      = mtouch_read_data,
1124                 .init           = mtouch_init,
1125         },
1126 #endif
1127
1128 #ifdef CONFIG_TOUCHSCREEN_USB_ITM
1129         [DEVTYPE_ITM] = {
1130                 .min_xc         = 0x0,
1131                 .max_xc         = 0x0fff,
1132                 .min_yc         = 0x0,
1133                 .max_yc         = 0x0fff,
1134                 .max_press      = 0xff,
1135                 .rept_size      = 8,
1136                 .read_data      = itm_read_data,
1137         },
1138 #endif
1139
1140 #ifdef CONFIG_TOUCHSCREEN_USB_ETURBO
1141         [DEVTYPE_ETURBO] = {
1142                 .min_xc         = 0x0,
1143                 .max_xc         = 0x07ff,
1144                 .min_yc         = 0x0,
1145                 .max_yc         = 0x07ff,
1146                 .rept_size      = 8,
1147                 .process_pkt    = usbtouch_process_multi,
1148                 .get_pkt_len    = eturbo_get_pkt_len,
1149                 .read_data      = eturbo_read_data,
1150         },
1151 #endif
1152
1153 #ifdef CONFIG_TOUCHSCREEN_USB_GUNZE
1154         [DEVTYPE_GUNZE] = {
1155                 .min_xc         = 0x0,
1156                 .max_xc         = 0x0fff,
1157                 .min_yc         = 0x0,
1158                 .max_yc         = 0x0fff,
1159                 .rept_size      = 4,
1160                 .read_data      = gunze_read_data,
1161         },
1162 #endif
1163
1164 #ifdef CONFIG_TOUCHSCREEN_USB_DMC_TSC10
1165         [DEVTYPE_DMC_TSC10] = {
1166                 .min_xc         = 0x0,
1167                 .max_xc         = 0x03ff,
1168                 .min_yc         = 0x0,
1169                 .max_yc         = 0x03ff,
1170                 .rept_size      = 5,
1171                 .init           = dmc_tsc10_init,
1172                 .read_data      = dmc_tsc10_read_data,
1173         },
1174 #endif
1175
1176 #ifdef CONFIG_TOUCHSCREEN_USB_IRTOUCH
1177         [DEVTYPE_IRTOUCH] = {
1178                 .min_xc         = 0x0,
1179                 .max_xc         = 0x0fff,
1180                 .min_yc         = 0x0,
1181                 .max_yc         = 0x0fff,
1182                 .rept_size      = 8,
1183                 .read_data      = irtouch_read_data,
1184         },
1185
1186         [DEVTYPE_IRTOUCH_HIRES] = {
1187                 .min_xc         = 0x0,
1188                 .max_xc         = 0x7fff,
1189                 .min_yc         = 0x0,
1190                 .max_yc         = 0x7fff,
1191                 .rept_size      = 8,
1192                 .read_data      = irtouch_read_data,
1193         },
1194 #endif
1195
1196 #ifdef CONFIG_TOUCHSCREEN_USB_IDEALTEK
1197         [DEVTYPE_IDEALTEK] = {
1198                 .min_xc         = 0x0,
1199                 .max_xc         = 0x0fff,
1200                 .min_yc         = 0x0,
1201                 .max_yc         = 0x0fff,
1202                 .rept_size      = 8,
1203                 .process_pkt    = usbtouch_process_multi,
1204                 .get_pkt_len    = idealtek_get_pkt_len,
1205                 .read_data      = idealtek_read_data,
1206         },
1207 #endif
1208
1209 #ifdef CONFIG_TOUCHSCREEN_USB_GENERAL_TOUCH
1210         [DEVTYPE_GENERAL_TOUCH] = {
1211                 .min_xc         = 0x0,
1212                 .max_xc         = 0x7fff,
1213                 .min_yc         = 0x0,
1214                 .max_yc         = 0x7fff,
1215                 .rept_size      = 7,
1216                 .read_data      = general_touch_read_data,
1217         },
1218 #endif
1219
1220 #ifdef CONFIG_TOUCHSCREEN_USB_GOTOP
1221         [DEVTYPE_GOTOP] = {
1222                 .min_xc         = 0x0,
1223                 .max_xc         = 0x03ff,
1224                 .min_yc         = 0x0,
1225                 .max_yc         = 0x03ff,
1226                 .rept_size      = 4,
1227                 .read_data      = gotop_read_data,
1228         },
1229 #endif
1230
1231 #ifdef CONFIG_TOUCHSCREEN_USB_JASTEC
1232         [DEVTYPE_JASTEC] = {
1233                 .min_xc         = 0x0,
1234                 .max_xc         = 0x0fff,
1235                 .min_yc         = 0x0,
1236                 .max_yc         = 0x0fff,
1237                 .rept_size      = 4,
1238                 .read_data      = jastec_read_data,
1239         },
1240 #endif
1241
1242 #ifdef CONFIG_TOUCHSCREEN_USB_E2I
1243         [DEVTYPE_E2I] = {
1244                 .min_xc         = 0x0,
1245                 .max_xc         = 0x7fff,
1246                 .min_yc         = 0x0,
1247                 .max_yc         = 0x7fff,
1248                 .rept_size      = 6,
1249                 .init           = e2i_init,
1250                 .read_data      = e2i_read_data,
1251         },
1252 #endif
1253
1254 #ifdef CONFIG_TOUCHSCREEN_USB_ZYTRONIC
1255         [DEVTYPE_ZYTRONIC] = {
1256                 .min_xc         = 0x0,
1257                 .max_xc         = 0x03ff,
1258                 .min_yc         = 0x0,
1259                 .max_yc         = 0x03ff,
1260                 .rept_size      = 5,
1261                 .read_data      = zytronic_read_data,
1262                 .irq_always     = true,
1263         },
1264 #endif
1265
1266 #ifdef CONFIG_TOUCHSCREEN_USB_ETT_TC45USB
1267         [DEVTYPE_TC45USB] = {
1268                 .min_xc         = 0x0,
1269                 .max_xc         = 0x0fff,
1270                 .min_yc         = 0x0,
1271                 .max_yc         = 0x0fff,
1272                 .rept_size      = 5,
1273                 .read_data      = tc45usb_read_data,
1274         },
1275 #endif
1276
1277 #ifdef CONFIG_TOUCHSCREEN_USB_NEXIO
1278         [DEVTYPE_NEXIO] = {
1279                 .rept_size      = 1024,
1280                 .irq_always     = true,
1281                 .read_data      = nexio_read_data,
1282                 .alloc          = nexio_alloc,
1283                 .init           = nexio_init,
1284                 .exit           = nexio_exit,
1285         },
1286 #endif
1287 #ifdef CONFIG_TOUCHSCREEN_USB_EASYTOUCH
1288         [DEVTYPE_ETOUCH] = {
1289                 .min_xc         = 0x0,
1290                 .max_xc         = 0x07ff,
1291                 .min_yc         = 0x0,
1292                 .max_yc         = 0x07ff,
1293                 .rept_size      = 16,
1294                 .process_pkt    = usbtouch_process_multi,
1295                 .get_pkt_len    = etouch_get_pkt_len,
1296                 .read_data      = etouch_read_data,
1297         },
1298 #endif
1299 };
1300
1301
1302 /*****************************************************************************
1303  * Generic Part
1304  */
1305 static void usbtouch_process_pkt(struct usbtouch_usb *usbtouch,
1306                                  unsigned char *pkt, int len)
1307 {
1308         struct usbtouch_device_info *type = usbtouch->type;
1309
1310         if (!type->read_data(usbtouch, pkt))
1311                         return;
1312
1313         input_report_key(usbtouch->input, BTN_TOUCH, usbtouch->touch);
1314
1315         if (swap_xy) {
1316                 input_report_abs(usbtouch->input, ABS_X, usbtouch->y);
1317                 input_report_abs(usbtouch->input, ABS_Y, usbtouch->x);
1318         } else {
1319                 input_report_abs(usbtouch->input, ABS_X, usbtouch->x);
1320                 input_report_abs(usbtouch->input, ABS_Y, usbtouch->y);
1321         }
1322         if (type->max_press)
1323                 input_report_abs(usbtouch->input, ABS_PRESSURE, usbtouch->press);
1324         input_sync(usbtouch->input);
1325 }
1326
1327
1328 #ifdef MULTI_PACKET
1329 static void usbtouch_process_multi(struct usbtouch_usb *usbtouch,
1330                                    unsigned char *pkt, int len)
1331 {
1332         unsigned char *buffer;
1333         int pkt_len, pos, buf_len, tmp;
1334
1335         /* process buffer */
1336         if (unlikely(usbtouch->buf_len)) {
1337                 /* try to get size */
1338                 pkt_len = usbtouch->type->get_pkt_len(
1339                                 usbtouch->buffer, usbtouch->buf_len);
1340
1341                 /* drop? */
1342                 if (unlikely(!pkt_len))
1343                         goto out_flush_buf;
1344
1345                 /* need to append -pkt_len bytes before able to get size */
1346                 if (unlikely(pkt_len < 0)) {
1347                         int append = -pkt_len;
1348                         if (unlikely(append > len))
1349                                append = len;
1350                         if (usbtouch->buf_len + append >= usbtouch->type->rept_size)
1351                                 goto out_flush_buf;
1352                         memcpy(usbtouch->buffer + usbtouch->buf_len, pkt, append);
1353                         usbtouch->buf_len += append;
1354
1355                         pkt_len = usbtouch->type->get_pkt_len(
1356                                         usbtouch->buffer, usbtouch->buf_len);
1357                         if (pkt_len < 0)
1358                                 return;
1359                 }
1360
1361                 /* append */
1362                 tmp = pkt_len - usbtouch->buf_len;
1363                 if (usbtouch->buf_len + tmp >= usbtouch->type->rept_size)
1364                         goto out_flush_buf;
1365                 memcpy(usbtouch->buffer + usbtouch->buf_len, pkt, tmp);
1366                 usbtouch_process_pkt(usbtouch, usbtouch->buffer, pkt_len);
1367
1368                 buffer = pkt + tmp;
1369                 buf_len = len - tmp;
1370         } else {
1371                 buffer = pkt;
1372                 buf_len = len;
1373         }
1374
1375         /* loop over the received packet, process */
1376         pos = 0;
1377         while (pos < buf_len) {
1378                 /* get packet len */
1379                 pkt_len = usbtouch->type->get_pkt_len(buffer + pos,
1380                                                         buf_len - pos);
1381
1382                 /* unknown packet: skip one byte */
1383                 if (unlikely(!pkt_len)) {
1384                         pos++;
1385                         continue;
1386                 }
1387
1388                 /* full packet: process */
1389                 if (likely((pkt_len > 0) && (pkt_len <= buf_len - pos))) {
1390                         usbtouch_process_pkt(usbtouch, buffer + pos, pkt_len);
1391                 } else {
1392                         /* incomplete packet: save in buffer */
1393                         memcpy(usbtouch->buffer, buffer + pos, buf_len - pos);
1394                         usbtouch->buf_len = buf_len - pos;
1395                         return;
1396                 }
1397                 pos += pkt_len;
1398         }
1399
1400 out_flush_buf:
1401         usbtouch->buf_len = 0;
1402         return;
1403 }
1404 #endif
1405
1406
1407 static void usbtouch_irq(struct urb *urb)
1408 {
1409         struct usbtouch_usb *usbtouch = urb->context;
1410         struct device *dev = &usbtouch->interface->dev;
1411         int retval;
1412
1413         switch (urb->status) {
1414         case 0:
1415                 /* success */
1416                 break;
1417         case -ETIME:
1418                 /* this urb is timing out */
1419                 dev_dbg(dev,
1420                         "%s - urb timed out - was the device unplugged?\n",
1421                         __func__);
1422                 return;
1423         case -ECONNRESET:
1424         case -ENOENT:
1425         case -ESHUTDOWN:
1426         case -EPIPE:
1427                 /* this urb is terminated, clean up */
1428                 dev_dbg(dev, "%s - urb shutting down with status: %d\n",
1429                         __func__, urb->status);
1430                 return;
1431         default:
1432                 dev_dbg(dev, "%s - nonzero urb status received: %d\n",
1433                         __func__, urb->status);
1434                 goto exit;
1435         }
1436
1437         usbtouch->type->process_pkt(usbtouch, usbtouch->data, urb->actual_length);
1438
1439 exit:
1440         usb_mark_last_busy(interface_to_usbdev(usbtouch->interface));
1441         retval = usb_submit_urb(urb, GFP_ATOMIC);
1442         if (retval)
1443                 dev_err(dev, "%s - usb_submit_urb failed with result: %d\n",
1444                         __func__, retval);
1445 }
1446
1447 static int usbtouch_open(struct input_dev *input)
1448 {
1449         struct usbtouch_usb *usbtouch = input_get_drvdata(input);
1450         int r;
1451
1452         usbtouch->irq->dev = interface_to_usbdev(usbtouch->interface);
1453
1454         r = usb_autopm_get_interface(usbtouch->interface) ? -EIO : 0;
1455         if (r < 0)
1456                 goto out;
1457
1458         if (!usbtouch->type->irq_always) {
1459                 if (usb_submit_urb(usbtouch->irq, GFP_KERNEL)) {
1460                         r = -EIO;
1461                         goto out_put;
1462                 }
1463         }
1464
1465         usbtouch->interface->needs_remote_wakeup = 1;
1466 out_put:
1467         usb_autopm_put_interface(usbtouch->interface);
1468 out:
1469         return r;
1470 }
1471
1472 static void usbtouch_close(struct input_dev *input)
1473 {
1474         struct usbtouch_usb *usbtouch = input_get_drvdata(input);
1475         int r;
1476
1477         if (!usbtouch->type->irq_always)
1478                 usb_kill_urb(usbtouch->irq);
1479         r = usb_autopm_get_interface(usbtouch->interface);
1480         usbtouch->interface->needs_remote_wakeup = 0;
1481         if (!r)
1482                 usb_autopm_put_interface(usbtouch->interface);
1483 }
1484
1485 static int usbtouch_suspend
1486 (struct usb_interface *intf, pm_message_t message)
1487 {
1488         struct usbtouch_usb *usbtouch = usb_get_intfdata(intf);
1489
1490         usb_kill_urb(usbtouch->irq);
1491
1492         return 0;
1493 }
1494
1495 static int usbtouch_resume(struct usb_interface *intf)
1496 {
1497         struct usbtouch_usb *usbtouch = usb_get_intfdata(intf);
1498         struct input_dev *input = usbtouch->input;
1499         int result = 0;
1500
1501         mutex_lock(&input->mutex);
1502         if (input->users || usbtouch->type->irq_always)
1503                 result = usb_submit_urb(usbtouch->irq, GFP_NOIO);
1504         mutex_unlock(&input->mutex);
1505
1506         return result;
1507 }
1508
1509 static int usbtouch_reset_resume(struct usb_interface *intf)
1510 {
1511         struct usbtouch_usb *usbtouch = usb_get_intfdata(intf);
1512         struct input_dev *input = usbtouch->input;
1513         int err = 0;
1514
1515         /* reinit the device */
1516         if (usbtouch->type->init) {
1517                 err = usbtouch->type->init(usbtouch);
1518                 if (err) {
1519                         dev_dbg(&intf->dev,
1520                                 "%s - type->init() failed, err: %d\n",
1521                                 __func__, err);
1522                         return err;
1523                 }
1524         }
1525
1526         /* restart IO if needed */
1527         mutex_lock(&input->mutex);
1528         if (input->users)
1529                 err = usb_submit_urb(usbtouch->irq, GFP_NOIO);
1530         mutex_unlock(&input->mutex);
1531
1532         return err;
1533 }
1534
1535 static void usbtouch_free_buffers(struct usb_device *udev,
1536                                   struct usbtouch_usb *usbtouch)
1537 {
1538         usb_free_coherent(udev, usbtouch->data_size,
1539                           usbtouch->data, usbtouch->data_dma);
1540         kfree(usbtouch->buffer);
1541 }
1542
1543 static struct usb_endpoint_descriptor *
1544 usbtouch_get_input_endpoint(struct usb_host_interface *interface)
1545 {
1546         int i;
1547
1548         for (i = 0; i < interface->desc.bNumEndpoints; i++)
1549                 if (usb_endpoint_dir_in(&interface->endpoint[i].desc))
1550                         return &interface->endpoint[i].desc;
1551
1552         return NULL;
1553 }
1554
1555 static int usbtouch_probe(struct usb_interface *intf,
1556                           const struct usb_device_id *id)
1557 {
1558         struct usbtouch_usb *usbtouch;
1559         struct input_dev *input_dev;
1560         struct usb_endpoint_descriptor *endpoint;
1561         struct usb_device *udev = interface_to_usbdev(intf);
1562         struct usbtouch_device_info *type;
1563         int err = -ENOMEM;
1564
1565         /* some devices are ignored */
1566         if (id->driver_info == DEVTYPE_IGNORE)
1567                 return -ENODEV;
1568
1569         endpoint = usbtouch_get_input_endpoint(intf->cur_altsetting);
1570         if (!endpoint)
1571                 return -ENXIO;
1572
1573         usbtouch = kzalloc(sizeof(struct usbtouch_usb), GFP_KERNEL);
1574         input_dev = input_allocate_device();
1575         if (!usbtouch || !input_dev)
1576                 goto out_free;
1577
1578         type = &usbtouch_dev_info[id->driver_info];
1579         usbtouch->type = type;
1580         if (!type->process_pkt)
1581                 type->process_pkt = usbtouch_process_pkt;
1582
1583         usbtouch->data_size = type->rept_size;
1584         if (type->get_pkt_len) {
1585                 /*
1586                  * When dealing with variable-length packets we should
1587                  * not request more than wMaxPacketSize bytes at once
1588                  * as we do not know if there is more data coming or
1589                  * we filled exactly wMaxPacketSize bytes and there is
1590                  * nothing else.
1591                  */
1592                 usbtouch->data_size = min(usbtouch->data_size,
1593                                           usb_endpoint_maxp(endpoint));
1594         }
1595
1596         usbtouch->data = usb_alloc_coherent(udev, usbtouch->data_size,
1597                                             GFP_KERNEL, &usbtouch->data_dma);
1598         if (!usbtouch->data)
1599                 goto out_free;
1600
1601         if (type->get_pkt_len) {
1602                 usbtouch->buffer = kmalloc(type->rept_size, GFP_KERNEL);
1603                 if (!usbtouch->buffer)
1604                         goto out_free_buffers;
1605         }
1606
1607         usbtouch->irq = usb_alloc_urb(0, GFP_KERNEL);
1608         if (!usbtouch->irq) {
1609                 dev_dbg(&intf->dev,
1610                         "%s - usb_alloc_urb failed: usbtouch->irq\n", __func__);
1611                 goto out_free_buffers;
1612         }
1613
1614         usbtouch->interface = intf;
1615         usbtouch->input = input_dev;
1616
1617         if (udev->manufacturer)
1618                 strlcpy(usbtouch->name, udev->manufacturer, sizeof(usbtouch->name));
1619
1620         if (udev->product) {
1621                 if (udev->manufacturer)
1622                         strlcat(usbtouch->name, " ", sizeof(usbtouch->name));
1623                 strlcat(usbtouch->name, udev->product, sizeof(usbtouch->name));
1624         }
1625
1626         if (!strlen(usbtouch->name))
1627                 snprintf(usbtouch->name, sizeof(usbtouch->name),
1628                         "USB Touchscreen %04x:%04x",
1629                          le16_to_cpu(udev->descriptor.idVendor),
1630                          le16_to_cpu(udev->descriptor.idProduct));
1631
1632         usb_make_path(udev, usbtouch->phys, sizeof(usbtouch->phys));
1633         strlcat(usbtouch->phys, "/input0", sizeof(usbtouch->phys));
1634
1635         input_dev->name = usbtouch->name;
1636         input_dev->phys = usbtouch->phys;
1637         usb_to_input_id(udev, &input_dev->id);
1638         input_dev->dev.parent = &intf->dev;
1639
1640         input_set_drvdata(input_dev, usbtouch);
1641
1642         input_dev->open = usbtouch_open;
1643         input_dev->close = usbtouch_close;
1644
1645         input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
1646         input_dev->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH);
1647         input_set_abs_params(input_dev, ABS_X, type->min_xc, type->max_xc, 0, 0);
1648         input_set_abs_params(input_dev, ABS_Y, type->min_yc, type->max_yc, 0, 0);
1649         if (type->max_press)
1650                 input_set_abs_params(input_dev, ABS_PRESSURE, type->min_press,
1651                                      type->max_press, 0, 0);
1652
1653         if (usb_endpoint_type(endpoint) == USB_ENDPOINT_XFER_INT)
1654                 usb_fill_int_urb(usbtouch->irq, udev,
1655                          usb_rcvintpipe(udev, endpoint->bEndpointAddress),
1656                          usbtouch->data, usbtouch->data_size,
1657                          usbtouch_irq, usbtouch, endpoint->bInterval);
1658         else
1659                 usb_fill_bulk_urb(usbtouch->irq, udev,
1660                          usb_rcvbulkpipe(udev, endpoint->bEndpointAddress),
1661                          usbtouch->data, usbtouch->data_size,
1662                          usbtouch_irq, usbtouch);
1663
1664         usbtouch->irq->dev = udev;
1665         usbtouch->irq->transfer_dma = usbtouch->data_dma;
1666         usbtouch->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1667
1668         /* device specific allocations */
1669         if (type->alloc) {
1670                 err = type->alloc(usbtouch);
1671                 if (err) {
1672                         dev_dbg(&intf->dev,
1673                                 "%s - type->alloc() failed, err: %d\n",
1674                                 __func__, err);
1675                         goto out_free_urb;
1676                 }
1677         }
1678
1679         /* device specific initialisation*/
1680         if (type->init) {
1681                 err = type->init(usbtouch);
1682                 if (err) {
1683                         dev_dbg(&intf->dev,
1684                                 "%s - type->init() failed, err: %d\n",
1685                                 __func__, err);
1686                         goto out_do_exit;
1687                 }
1688         }
1689
1690         err = input_register_device(usbtouch->input);
1691         if (err) {
1692                 dev_dbg(&intf->dev,
1693                         "%s - input_register_device failed, err: %d\n",
1694                         __func__, err);
1695                 goto out_do_exit;
1696         }
1697
1698         usb_set_intfdata(intf, usbtouch);
1699
1700         if (usbtouch->type->irq_always) {
1701                 /* this can't fail */
1702                 usb_autopm_get_interface(intf);
1703                 err = usb_submit_urb(usbtouch->irq, GFP_KERNEL);
1704                 if (err) {
1705                         usb_autopm_put_interface(intf);
1706                         dev_err(&intf->dev,
1707                                 "%s - usb_submit_urb failed with result: %d\n",
1708                                 __func__, err);
1709                         goto out_unregister_input;
1710                 }
1711         }
1712
1713         return 0;
1714
1715 out_unregister_input:
1716         input_unregister_device(input_dev);
1717         input_dev = NULL;
1718 out_do_exit:
1719         if (type->exit)
1720                 type->exit(usbtouch);
1721 out_free_urb:
1722         usb_free_urb(usbtouch->irq);
1723 out_free_buffers:
1724         usbtouch_free_buffers(udev, usbtouch);
1725 out_free:
1726         input_free_device(input_dev);
1727         kfree(usbtouch);
1728         return err;
1729 }
1730
1731 static void usbtouch_disconnect(struct usb_interface *intf)
1732 {
1733         struct usbtouch_usb *usbtouch = usb_get_intfdata(intf);
1734
1735         if (!usbtouch)
1736                 return;
1737
1738         dev_dbg(&intf->dev,
1739                 "%s - usbtouch is initialized, cleaning up\n", __func__);
1740
1741         usb_set_intfdata(intf, NULL);
1742         /* this will stop IO via close */
1743         input_unregister_device(usbtouch->input);
1744         usb_free_urb(usbtouch->irq);
1745         if (usbtouch->type->exit)
1746                 usbtouch->type->exit(usbtouch);
1747         usbtouch_free_buffers(interface_to_usbdev(intf), usbtouch);
1748         kfree(usbtouch);
1749 }
1750
1751 MODULE_DEVICE_TABLE(usb, usbtouch_devices);
1752
1753 static struct usb_driver usbtouch_driver = {
1754         .name           = "usbtouchscreen",
1755         .probe          = usbtouch_probe,
1756         .disconnect     = usbtouch_disconnect,
1757         .suspend        = usbtouch_suspend,
1758         .resume         = usbtouch_resume,
1759         .reset_resume   = usbtouch_reset_resume,
1760         .id_table       = usbtouch_devices,
1761         .supports_autosuspend = 1,
1762 };
1763
1764 module_usb_driver(usbtouch_driver);
1765
1766 MODULE_AUTHOR(DRIVER_AUTHOR);
1767 MODULE_DESCRIPTION(DRIVER_DESC);
1768 MODULE_LICENSE("GPL");
1769
1770 MODULE_ALIAS("touchkitusb");
1771 MODULE_ALIAS("itmtouch");
1772 MODULE_ALIAS("mtouchusb");