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/init.h>
  55 #include <linux/usb.h>
  56 #include <linux/usb/input.h>
  57 #include <linux/hid.h>
  58
  59
  60 #define DRIVER_VERSION          "v0.6"
  61 #define DRIVER_AUTHOR           "Daniel Ritz <daniel.ritz@gmx.ch>"
  62 #define DRIVER_DESC             "USB Touchscreen Driver"
  63
  64 static bool swap_xy;
  65 module_param(swap_xy, bool, 0644);
  66 MODULE_PARM_DESC(swap_xy, "If set X and Y axes are swapped.");
  67
  68 static bool hwcalib_xy;
  69 module_param(hwcalib_xy, bool, 0644);
  70 MODULE_PARM_DESC(hwcalib_xy, "If set hw-calibrated X/Y are used if available");
  71
  72 /* device specifc data/functions */
  73 struct usbtouch_usb;
  74 struct usbtouch_device_info {
  75         int min_xc, max_xc;
  76         int min_yc, max_yc;
  77         int min_press, max_press;
  78         int rept_size;
  79
  80         /*
  81          * Always service the USB devices irq not just when the input device is
  82          * open. This is useful when devices have a watchdog which prevents us
  83          * from periodically polling the device. Leave this unset unless your
  84          * touchscreen device requires it, as it does consume more of the USB
  85          * bandwidth.
  86          */
  87         bool irq_always;
  88
  89         void (*process_pkt) (struct usbtouch_usb *usbtouch, unsigned char *pkt, int len);
  90
  91         /*
  92          * used to get the packet len. possible return values:
  93          * > 0: packet len
  94          * = 0: skip one byte
  95          * < 0: -return value more bytes needed
  96          */
  97         int  (*get_pkt_len) (unsigned char *pkt, int len);
  98
  99         int  (*read_data)   (struct usbtouch_usb *usbtouch, unsigned char *pkt);
 100         int  (*alloc)       (struct usbtouch_usb *usbtouch);
 101         int  (*init)        (struct usbtouch_usb *usbtouch);
 102         void (*exit)        (struct usbtouch_usb *usbtouch);
 103 };
 104
 105 /* a usbtouch device */
 106 struct usbtouch_usb {
 107         unsigned char *data;
 108         dma_addr_t data_dma;
 109         int data_size;
 110         unsigned char *buffer;
 111         int buf_len;
 112         struct urb *irq;
 113         struct usb_interface *interface;
 114         struct input_dev *input;
 115         struct usbtouch_device_info *type;
 116         char name[128];
 117         char phys[64];
 118         void *priv;
 119
 120         int x, y;
 121         int touch, press;
 122 };
 123
 124
 125 /* device types */
 126 enum {
 127         DEVTYPE_IGNORE = -1,
 128         DEVTYPE_EGALAX,
 129         DEVTYPE_PANJIT,
 130         DEVTYPE_3M,
 131         DEVTYPE_ITM,
 132         DEVTYPE_ETURBO,
 133         DEVTYPE_GUNZE,
 134         DEVTYPE_DMC_TSC10,
 135         DEVTYPE_IRTOUCH,
 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 #endif
 203
 204 #ifdef CONFIG_TOUCHSCREEN_USB_IDEALTEK
 205         {USB_DEVICE(0x1391, 0x1000), .driver_info = DEVTYPE_IDEALTEK},
 206 #endif
 207
 208 #ifdef CONFIG_TOUCHSCREEN_USB_GENERAL_TOUCH
 209         {USB_DEVICE(0x0dfc, 0x0001), .driver_info = DEVTYPE_GENERAL_TOUCH},
 210 #endif
 211
 212 #ifdef CONFIG_TOUCHSCREEN_USB_GOTOP
 213         {USB_DEVICE(0x08f2, 0x007f), .driver_info = DEVTYPE_GOTOP},
 214         {USB_DEVICE(0x08f2, 0x00ce), .driver_info = DEVTYPE_GOTOP},
 215         {USB_DEVICE(0x08f2, 0x00f4), .driver_info = DEVTYPE_GOTOP},
 216 #endif
 217
 218 #ifdef CONFIG_TOUCHSCREEN_USB_JASTEC
 219         {USB_DEVICE(0x0f92, 0x0001), .driver_info = DEVTYPE_JASTEC},
 220 #endif
 221
 222 #ifdef CONFIG_TOUCHSCREEN_USB_E2I
 223         {USB_DEVICE(0x1ac7, 0x0001), .driver_info = DEVTYPE_E2I},
 224 #endif
 225
 226 #ifdef CONFIG_TOUCHSCREEN_USB_ZYTRONIC
 227         {USB_DEVICE(0x14c8, 0x0003), .driver_info = DEVTYPE_ZYTRONIC},
 228 #endif
 229
 230 #ifdef CONFIG_TOUCHSCREEN_USB_ETT_TC45USB
 231         /* TC5UH */
 232         {USB_DEVICE(0x0664, 0x0309), .driver_info = DEVTYPE_TC45USB},
 233         /* TC4UM */
 234         {USB_DEVICE(0x0664, 0x0306), .driver_info = DEVTYPE_TC45USB},
 235 #endif
 236
 237 #ifdef CONFIG_TOUCHSCREEN_USB_NEXIO
 238         /* data interface only */
 239         {USB_DEVICE_AND_INTERFACE_INFO(0x10f0, 0x2002, 0x0a, 0x00, 0x00),
 240                 .driver_info = DEVTYPE_NEXIO},
 241         {USB_DEVICE_AND_INTERFACE_INFO(0x1870, 0x0001, 0x0a, 0x00, 0x00),
 242                 .driver_info = DEVTYPE_NEXIO},
 243 #endif
 244
 245 #ifdef CONFIG_TOUCHSCREEN_USB_ELO
 246         {USB_DEVICE(0x04e7, 0x0020), .driver_info = DEVTYPE_ELO},
 247 #endif
 248
 249 #ifdef CONFIG_TOUCHSCREEN_USB_EASYTOUCH
 250         {USB_DEVICE(0x7374, 0x0001), .driver_info = DEVTYPE_ETOUCH},
 251 #endif
 252
 253         {}
 254 };
 255
 256
 257 /*****************************************************************************
 258  * e2i Part
 259  */
 260
 261 #ifdef CONFIG_TOUCHSCREEN_USB_E2I
 262 static int e2i_init(struct usbtouch_usb *usbtouch)
 263 {
 264         int ret;
 265         struct usb_device *udev = interface_to_usbdev(usbtouch->interface);
 266
 267         ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
 268                               0x01, 0x02, 0x0000, 0x0081,
 269                               NULL, 0, USB_CTRL_SET_TIMEOUT);
 270
 271         dev_dbg(&usbtouch->interface->dev,
 272                 "%s - usb_control_msg - E2I_RESET - bytes|err: %d\n",
 273                 __func__, ret);
 274         return ret;
 275 }
 276
 277 static int e2i_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 278 {
 279         int tmp = (pkt[0] << 8) | pkt[1];
 280         dev->x  = (pkt[2] << 8) | pkt[3];
 281         dev->y  = (pkt[4] << 8) | pkt[5];
 282
 283         tmp = tmp - 0xA000;
 284         dev->touch = (tmp > 0);
 285         dev->press = (tmp > 0 ? tmp : 0);
 286
 287         return 1;
 288 }
 289 #endif
 290
 291
 292 /*****************************************************************************
 293  * eGalax part
 294  */
 295
 296 #ifdef CONFIG_TOUCHSCREEN_USB_EGALAX
 297
 298 #ifndef MULTI_PACKET
 299 #define MULTI_PACKET
 300 #endif
 301
 302 #define EGALAX_PKT_TYPE_MASK            0xFE
 303 #define EGALAX_PKT_TYPE_REPT            0x80
 304 #define EGALAX_PKT_TYPE_DIAG            0x0A
 305
 306 static int egalax_init(struct usbtouch_usb *usbtouch)
 307 {
 308         int ret, i;
 309         unsigned char *buf;
 310         struct usb_device *udev = interface_to_usbdev(usbtouch->interface);
 311
 312         /*
 313          * An eGalax diagnostic packet kicks the device into using the right
 314          * protocol.  We send a "check active" packet.  The response will be
 315          * read later and ignored.
 316          */
 317
 318         buf = kmalloc(3, GFP_KERNEL);
 319         if (!buf)
 320                 return -ENOMEM;
 321
 322         buf[0] = EGALAX_PKT_TYPE_DIAG;
 323         buf[1] = 1;     /* length */
 324         buf[2] = 'A';   /* command - check active */
 325
 326         for (i = 0; i < 3; i++) {
 327                 ret = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
 328                                       0,
 329                                       USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 330                                       0, 0, buf, 3,
 331                                       USB_CTRL_SET_TIMEOUT);
 332                 if (ret >= 0) {
 333                         ret = 0;
 334                         break;
 335                 }
 336                 if (ret != -EPIPE)
 337                         break;
 338         }
 339
 340         kfree(buf);
 341
 342         return ret;
 343 }
 344
 345 static int egalax_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 346 {
 347         if ((pkt[0] & EGALAX_PKT_TYPE_MASK) != EGALAX_PKT_TYPE_REPT)
 348                 return 0;
 349
 350         dev->x = ((pkt[3] & 0x0F) << 7) | (pkt[4] & 0x7F);
 351         dev->y = ((pkt[1] & 0x0F) << 7) | (pkt[2] & 0x7F);
 352         dev->touch = pkt[0] & 0x01;
 353
 354         return 1;
 355 }
 356
 357 static int egalax_get_pkt_len(unsigned char *buf, int len)
 358 {
 359         switch (buf[0] & EGALAX_PKT_TYPE_MASK) {
 360         case EGALAX_PKT_TYPE_REPT:
 361                 return 5;
 362
 363         case EGALAX_PKT_TYPE_DIAG:
 364                 if (len < 2)
 365                         return -1;
 366
 367                 return buf[1] + 2;
 368         }
 369
 370         return 0;
 371 }
 372 #endif
 373
 374 /*****************************************************************************
 375  * EasyTouch part
 376  */
 377
 378 #ifdef CONFIG_TOUCHSCREEN_USB_EASYTOUCH
 379
 380 #ifndef MULTI_PACKET
 381 #define MULTI_PACKET
 382 #endif
 383
 384 #define ETOUCH_PKT_TYPE_MASK            0xFE
 385 #define ETOUCH_PKT_TYPE_REPT            0x80
 386 #define ETOUCH_PKT_TYPE_REPT2           0xB0
 387 #define ETOUCH_PKT_TYPE_DIAG            0x0A
 388
 389 static int etouch_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 390 {
 391         if ((pkt[0] & ETOUCH_PKT_TYPE_MASK) != ETOUCH_PKT_TYPE_REPT &&
 392                 (pkt[0] & ETOUCH_PKT_TYPE_MASK) != ETOUCH_PKT_TYPE_REPT2)
 393                 return 0;
 394
 395         dev->x = ((pkt[1] & 0x1F) << 7) | (pkt[2] & 0x7F);
 396         dev->y = ((pkt[3] & 0x1F) << 7) | (pkt[4] & 0x7F);
 397         dev->touch = pkt[0] & 0x01;
 398
 399         return 1;
 400 }
 401
 402 static int etouch_get_pkt_len(unsigned char *buf, int len)
 403 {
 404         switch (buf[0] & ETOUCH_PKT_TYPE_MASK) {
 405         case ETOUCH_PKT_TYPE_REPT:
 406         case ETOUCH_PKT_TYPE_REPT2:
 407                 return 5;
 408
 409         case ETOUCH_PKT_TYPE_DIAG:
 410                 if (len < 2)
 411                         return -1;
 412
 413                 return buf[1] + 2;
 414         }
 415
 416         return 0;
 417 }
 418 #endif
 419
 420 /*****************************************************************************
 421  * PanJit Part
 422  */
 423 #ifdef CONFIG_TOUCHSCREEN_USB_PANJIT
 424 static int panjit_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 425 {
 426         dev->x = ((pkt[2] & 0x0F) << 8) | pkt[1];
 427         dev->y = ((pkt[4] & 0x0F) << 8) | pkt[3];
 428         dev->touch = pkt[0] & 0x01;
 429
 430         return 1;
 431 }
 432 #endif
 433
 434
 435 /*****************************************************************************
 436  * 3M/Microtouch Part
 437  */
 438 #ifdef CONFIG_TOUCHSCREEN_USB_3M
 439
 440 #define MTOUCHUSB_ASYNC_REPORT          1
 441 #define MTOUCHUSB_RESET                 7
 442 #define MTOUCHUSB_REQ_CTRLLR_ID         10
 443
 444 static int mtouch_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 445 {
 446         if (hwcalib_xy) {
 447                 dev->x = (pkt[4] << 8) | pkt[3];
 448                 dev->y = 0xffff - ((pkt[6] << 8) | pkt[5]);
 449         } else {
 450                 dev->x = (pkt[8] << 8) | pkt[7];
 451                 dev->y = (pkt[10] << 8) | pkt[9];
 452         }
 453         dev->touch = (pkt[2] & 0x40) ? 1 : 0;
 454
 455         return 1;
 456 }
 457
 458 static int mtouch_init(struct usbtouch_usb *usbtouch)
 459 {
 460         int ret, i;
 461         struct usb_device *udev = interface_to_usbdev(usbtouch->interface);
 462
 463         ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
 464                               MTOUCHUSB_RESET,
 465                               USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 466                               1, 0, NULL, 0, USB_CTRL_SET_TIMEOUT);
 467         dev_dbg(&usbtouch->interface->dev,
 468                 "%s - usb_control_msg - MTOUCHUSB_RESET - bytes|err: %d\n",
 469                 __func__, ret);
 470         if (ret < 0)
 471                 return ret;
 472         msleep(150);
 473
 474         for (i = 0; i < 3; i++) {
 475                 ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
 476                                       MTOUCHUSB_ASYNC_REPORT,
 477                                       USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 478                                       1, 1, NULL, 0, USB_CTRL_SET_TIMEOUT);
 479                 dev_dbg(&usbtouch->interface->dev,
 480                         "%s - usb_control_msg - MTOUCHUSB_ASYNC_REPORT - bytes|err: %d\n",
 481                         __func__, ret);
 482                 if (ret >= 0)
 483                         break;
 484                 if (ret != -EPIPE)
 485                         return ret;
 486         }
 487
 488         /* Default min/max xy are the raw values, override if using hw-calib */
 489         if (hwcalib_xy) {
 490                 input_set_abs_params(usbtouch->input, ABS_X, 0, 0xffff, 0, 0);
 491                 input_set_abs_params(usbtouch->input, ABS_Y, 0, 0xffff, 0, 0);
 492         }
 493
 494         return 0;
 495 }
 496 #endif
 497
 498
 499 /*****************************************************************************
 500  * ITM Part
 501  */
 502 #ifdef CONFIG_TOUCHSCREEN_USB_ITM
 503 static int itm_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 504 {
 505         int touch;
 506         /*
 507          * ITM devices report invalid x/y data if not touched.
 508          * if the screen was touched before but is not touched any more
 509          * report touch as 0 with the last valid x/y data once. then stop
 510          * reporting data until touched again.
 511          */
 512         dev->press = ((pkt[2] & 0x01) << 7) | (pkt[5] & 0x7F);
 513
 514         touch = ~pkt[7] & 0x20;
 515         if (!touch) {
 516                 if (dev->touch) {
 517                         dev->touch = 0;
 518                         return 1;
 519                 }
 520
 521                 return 0;
 522         }
 523
 524         dev->x = ((pkt[0] & 0x1F) << 7) | (pkt[3] & 0x7F);
 525         dev->y = ((pkt[1] & 0x1F) << 7) | (pkt[4] & 0x7F);
 526         dev->touch = touch;
 527
 528         return 1;
 529 }
 530 #endif
 531
 532
 533 /*****************************************************************************
 534  * eTurboTouch part
 535  */
 536 #ifdef CONFIG_TOUCHSCREEN_USB_ETURBO
 537 #ifndef MULTI_PACKET
 538 #define MULTI_PACKET
 539 #endif
 540 static int eturbo_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 541 {
 542         unsigned int shift;
 543
 544         /* packets should start with sync */
 545         if (!(pkt[0] & 0x80))
 546                 return 0;
 547
 548         shift = (6 - (pkt[0] & 0x03));
 549         dev->x = ((pkt[3] << 7) | pkt[4]) >> shift;
 550         dev->y = ((pkt[1] << 7) | pkt[2]) >> shift;
 551         dev->touch = (pkt[0] & 0x10) ? 1 : 0;
 552
 553         return 1;
 554 }
 555
 556 static int eturbo_get_pkt_len(unsigned char *buf, int len)
 557 {
 558         if (buf[0] & 0x80)
 559                 return 5;
 560         if (buf[0] == 0x01)
 561                 return 3;
 562         return 0;
 563 }
 564 #endif
 565
 566
 567 /*****************************************************************************
 568  * Gunze part
 569  */
 570 #ifdef CONFIG_TOUCHSCREEN_USB_GUNZE
 571 static int gunze_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 572 {
 573         if (!(pkt[0] & 0x80) || ((pkt[1] | pkt[2] | pkt[3]) & 0x80))
 574                 return 0;
 575
 576         dev->x = ((pkt[0] & 0x1F) << 7) | (pkt[2] & 0x7F);
 577         dev->y = ((pkt[1] & 0x1F) << 7) | (pkt[3] & 0x7F);
 578         dev->touch = pkt[0] & 0x20;
 579
 580         return 1;
 581 }
 582 #endif
 583
 584 /*****************************************************************************
 585  * DMC TSC-10/25 Part
 586  *
 587  * Documentation about the controller and it's protocol can be found at
 588  *   http://www.dmccoltd.com/files/controler/tsc10usb_pi_e.pdf
 589  *   http://www.dmccoltd.com/files/controler/tsc25_usb_e.pdf
 590  */
 591 #ifdef CONFIG_TOUCHSCREEN_USB_DMC_TSC10
 592
 593 /* supported data rates. currently using 130 */
 594 #define TSC10_RATE_POINT        0x50
 595 #define TSC10_RATE_30           0x40
 596 #define TSC10_RATE_50           0x41
 597 #define TSC10_RATE_80           0x42
 598 #define TSC10_RATE_100          0x43
 599 #define TSC10_RATE_130          0x44
 600 #define TSC10_RATE_150          0x45
 601
 602 /* commands */
 603 #define TSC10_CMD_RESET         0x55
 604 #define TSC10_CMD_RATE          0x05
 605 #define TSC10_CMD_DATA1         0x01
 606
 607 static int dmc_tsc10_init(struct usbtouch_usb *usbtouch)
 608 {
 609         struct usb_device *dev = interface_to_usbdev(usbtouch->interface);
 610         int ret = -ENOMEM;
 611         unsigned char *buf;
 612
 613         buf = kmalloc(2, GFP_NOIO);
 614         if (!buf)
 615                 goto err_nobuf;
 616         /* reset */
 617         buf[0] = buf[1] = 0xFF;
 618         ret = usb_control_msg(dev, usb_rcvctrlpipe (dev, 0),
 619                               TSC10_CMD_RESET,
 620                               USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 621                               0, 0, buf, 2, USB_CTRL_SET_TIMEOUT);
 622         if (ret < 0)
 623                 goto err_out;
 624         if (buf[0] != 0x06) {
 625                 ret = -ENODEV;
 626                 goto err_out;
 627         }
 628
 629         /* set coordinate output rate */
 630         buf[0] = buf[1] = 0xFF;
 631         ret = usb_control_msg(dev, usb_rcvctrlpipe (dev, 0),
 632                               TSC10_CMD_RATE,
 633                               USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 634                               TSC10_RATE_150, 0, buf, 2, USB_CTRL_SET_TIMEOUT);
 635         if (ret < 0)
 636                 goto err_out;
 637         if ((buf[0] != 0x06) && (buf[0] != 0x15 || buf[1] != 0x01)) {
 638                 ret = -ENODEV;
 639                 goto err_out;
 640         }
 641
 642         /* start sending data */
 643         ret = usb_control_msg(dev, usb_rcvctrlpipe (dev, 0),
 644                               TSC10_CMD_DATA1,
 645                               USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 646                               0, 0, NULL, 0, USB_CTRL_SET_TIMEOUT);
 647 err_out:
 648         kfree(buf);
 649 err_nobuf:
 650         return ret;
 651 }
 652
 653
 654 static int dmc_tsc10_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 655 {
 656         dev->x = ((pkt[2] & 0x03) << 8) | pkt[1];
 657         dev->y = ((pkt[4] & 0x03) << 8) | pkt[3];
 658         dev->touch = pkt[0] & 0x01;
 659
 660         return 1;
 661 }
 662 #endif
 663
 664
 665 /*****************************************************************************
 666  * IRTOUCH Part
 667  */
 668 #ifdef CONFIG_TOUCHSCREEN_USB_IRTOUCH
 669 static int irtouch_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 670 {
 671         dev->x = (pkt[3] << 8) | pkt[2];
 672         dev->y = (pkt[5] << 8) | pkt[4];
 673         dev->touch = (pkt[1] & 0x03) ? 1 : 0;
 674
 675         return 1;
 676 }
 677 #endif
 678
 679 /*****************************************************************************
 680  * ET&T TC5UH/TC4UM part
 681  */
 682 #ifdef CONFIG_TOUCHSCREEN_USB_ETT_TC45USB
 683 static int tc45usb_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 684 {
 685         dev->x = ((pkt[2] & 0x0F) << 8) | pkt[1];
 686         dev->y = ((pkt[4] & 0x0F) << 8) | pkt[3];
 687         dev->touch = pkt[0] & 0x01;
 688
 689         return 1;
 690 }
 691 #endif
 692
 693 /*****************************************************************************
 694  * IdealTEK URTC1000 Part
 695  */
 696 #ifdef CONFIG_TOUCHSCREEN_USB_IDEALTEK
 697 #ifndef MULTI_PACKET
 698 #define MULTI_PACKET
 699 #endif
 700 static int idealtek_get_pkt_len(unsigned char *buf, int len)
 701 {
 702         if (buf[0] & 0x80)
 703                 return 5;
 704         if (buf[0] == 0x01)
 705                 return len;
 706         return 0;
 707 }
 708
 709 static int idealtek_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 710 {
 711         switch (pkt[0] & 0x98) {
 712         case 0x88:
 713                 /* touch data in IdealTEK mode */
 714                 dev->x = (pkt[1] << 5) | (pkt[2] >> 2);
 715                 dev->y = (pkt[3] << 5) | (pkt[4] >> 2);
 716                 dev->touch = (pkt[0] & 0x40) ? 1 : 0;
 717                 return 1;
 718
 719         case 0x98:
 720                 /* touch data in MT emulation mode */
 721                 dev->x = (pkt[2] << 5) | (pkt[1] >> 2);
 722                 dev->y = (pkt[4] << 5) | (pkt[3] >> 2);
 723                 dev->touch = (pkt[0] & 0x40) ? 1 : 0;
 724                 return 1;
 725
 726         default:
 727                 return 0;
 728         }
 729 }
 730 #endif
 731
 732 /*****************************************************************************
 733  * General Touch Part
 734  */
 735 #ifdef CONFIG_TOUCHSCREEN_USB_GENERAL_TOUCH
 736 static int general_touch_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 737 {
 738         dev->x = (pkt[2] << 8) | pkt[1];
 739         dev->y = (pkt[4] << 8) | pkt[3];
 740         dev->press = pkt[5] & 0xff;
 741         dev->touch = pkt[0] & 0x01;
 742
 743         return 1;
 744 }
 745 #endif
 746
 747 /*****************************************************************************
 748  * GoTop Part
 749  */
 750 #ifdef CONFIG_TOUCHSCREEN_USB_GOTOP
 751 static int gotop_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 752 {
 753         dev->x = ((pkt[1] & 0x38) << 4) | pkt[2];
 754         dev->y = ((pkt[1] & 0x07) << 7) | pkt[3];
 755         dev->touch = pkt[0] & 0x01;
 756
 757         return 1;
 758 }
 759 #endif
 760
 761 /*****************************************************************************
 762  * JASTEC Part
 763  */
 764 #ifdef CONFIG_TOUCHSCREEN_USB_JASTEC
 765 static int jastec_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 766 {
 767         dev->x = ((pkt[0] & 0x3f) << 6) | (pkt[2] & 0x3f);
 768         dev->y = ((pkt[1] & 0x3f) << 6) | (pkt[3] & 0x3f);
 769         dev->touch = (pkt[0] & 0x40) >> 6;
 770
 771         return 1;
 772 }
 773 #endif
 774
 775 /*****************************************************************************
 776  * Zytronic Part
 777  */
 778 #ifdef CONFIG_TOUCHSCREEN_USB_ZYTRONIC
 779 static int zytronic_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 780 {
 781         struct usb_interface *intf = dev->interface;
 782
 783         switch (pkt[0]) {
 784         case 0x3A: /* command response */
 785                 dev_dbg(&intf->dev, "%s: Command response %d\n", __func__, pkt[1]);
 786                 break;
 787
 788         case 0xC0: /* down */
 789                 dev->x = (pkt[1] & 0x7f) | ((pkt[2] & 0x07) << 7);
 790                 dev->y = (pkt[3] & 0x7f) | ((pkt[4] & 0x07) << 7);
 791                 dev->touch = 1;
 792                 dev_dbg(&intf->dev, "%s: down %d,%d\n", __func__, dev->x, dev->y);
 793                 return 1;
 794
 795         case 0x80: /* up */
 796                 dev->x = (pkt[1] & 0x7f) | ((pkt[2] & 0x07) << 7);
 797                 dev->y = (pkt[3] & 0x7f) | ((pkt[4] & 0x07) << 7);
 798                 dev->touch = 0;
 799                 dev_dbg(&intf->dev, "%s: up %d,%d\n", __func__, dev->x, dev->y);
 800                 return 1;
 801
 802         default:
 803                 dev_dbg(&intf->dev, "%s: Unknown return %d\n", __func__, pkt[0]);
 804                 break;
 805         }
 806
 807         return 0;
 808 }
 809 #endif
 810
 811 /*****************************************************************************
 812  * NEXIO Part
 813  */
 814 #ifdef CONFIG_TOUCHSCREEN_USB_NEXIO
 815
 816 #define NEXIO_TIMEOUT   5000
 817 #define NEXIO_BUFSIZE   1024
 818 #define NEXIO_THRESHOLD 50
 819
 820 struct nexio_priv {
 821         struct urb *ack;
 822         unsigned char *ack_buf;
 823 };
 824
 825 struct nexio_touch_packet {
 826         u8      flags;          /* 0xe1 = touch, 0xe1 = release */
 827         __be16  data_len;       /* total bytes of touch data */
 828         __be16  x_len;          /* bytes for X axis */
 829         __be16  y_len;          /* bytes for Y axis */
 830         u8      data[];
 831 } __attribute__ ((packed));
 832
 833 static unsigned char nexio_ack_pkt[2] = { 0xaa, 0x02 };
 834 static unsigned char nexio_init_pkt[4] = { 0x82, 0x04, 0x0a, 0x0f };
 835
 836 static void nexio_ack_complete(struct urb *urb)
 837 {
 838 }
 839
 840 static int nexio_alloc(struct usbtouch_usb *usbtouch)
 841 {
 842         struct nexio_priv *priv;
 843         int ret = -ENOMEM;
 844
 845         usbtouch->priv = kmalloc(sizeof(struct nexio_priv), GFP_KERNEL);
 846         if (!usbtouch->priv)
 847                 goto out_buf;
 848
 849         priv = usbtouch->priv;
 850
 851         priv->ack_buf = kmemdup(nexio_ack_pkt, sizeof(nexio_ack_pkt),
 852                                 GFP_KERNEL);
 853         if (!priv->ack_buf)
 854                 goto err_priv;
 855
 856         priv->ack = usb_alloc_urb(0, GFP_KERNEL);
 857         if (!priv->ack) {
 858                 dev_dbg(&usbtouch->interface->dev,
 859                         "%s - usb_alloc_urb failed: usbtouch->ack\n", __func__);
 860                 goto err_ack_buf;
 861         }
 862
 863         return 0;
 864
 865 err_ack_buf:
 866         kfree(priv->ack_buf);
 867 err_priv:
 868         kfree(priv);
 869 out_buf:
 870         return ret;
 871 }
 872
 873 static int nexio_init(struct usbtouch_usb *usbtouch)
 874 {
 875         struct usb_device *dev = interface_to_usbdev(usbtouch->interface);
 876         struct usb_host_interface *interface = usbtouch->interface->cur_altsetting;
 877         struct nexio_priv *priv = usbtouch->priv;
 878         int ret = -ENOMEM;
 879         int actual_len, i;
 880         unsigned char *buf;
 881         char *firmware_ver = NULL, *device_name = NULL;
 882         int input_ep = 0, output_ep = 0;
 883
 884         /* find first input and output endpoint */
 885         for (i = 0; i < interface->desc.bNumEndpoints; i++) {
 886                 if (!input_ep &&
 887                     usb_endpoint_dir_in(&interface->endpoint[i].desc))
 888                         input_ep = interface->endpoint[i].desc.bEndpointAddress;
 889                 if (!output_ep &&
 890                     usb_endpoint_dir_out(&interface->endpoint[i].desc))
 891                         output_ep = interface->endpoint[i].desc.bEndpointAddress;
 892         }
 893         if (!input_ep || !output_ep)
 894                 return -ENXIO;
 895
 896         buf = kmalloc(NEXIO_BUFSIZE, GFP_NOIO);
 897         if (!buf)
 898                 goto out_buf;
 899
 900         /* two empty reads */
 901         for (i = 0; i < 2; i++) {
 902                 ret = usb_bulk_msg(dev, usb_rcvbulkpipe(dev, input_ep),
 903                                    buf, NEXIO_BUFSIZE, &actual_len,
 904                                    NEXIO_TIMEOUT);
 905                 if (ret < 0)
 906                         goto out_buf;
 907         }
 908
 909         /* send init command */
 910         memcpy(buf, nexio_init_pkt, sizeof(nexio_init_pkt));
 911         ret = usb_bulk_msg(dev, usb_sndbulkpipe(dev, output_ep),
 912                            buf, sizeof(nexio_init_pkt), &actual_len,
 913                            NEXIO_TIMEOUT);
 914         if (ret < 0)
 915                 goto out_buf;
 916
 917         /* read replies */
 918         for (i = 0; i < 3; i++) {
 919                 memset(buf, 0, NEXIO_BUFSIZE);
 920                 ret = usb_bulk_msg(dev, usb_rcvbulkpipe(dev, input_ep),
 921                                    buf, NEXIO_BUFSIZE, &actual_len,
 922                                    NEXIO_TIMEOUT);
 923                 if (ret < 0 || actual_len < 1 || buf[1] != actual_len)
 924                         continue;
 925                 switch (buf[0]) {
 926                 case 0x83:      /* firmware version */
 927                         if (!firmware_ver)
 928                                 firmware_ver = kstrdup(&buf[2], GFP_NOIO);
 929                         break;
 930                 case 0x84:      /* device name */
 931                         if (!device_name)
 932                                 device_name = kstrdup(&buf[2], GFP_NOIO);
 933                         break;
 934                 }
 935         }
 936
 937         printk(KERN_INFO "Nexio device: %s, firmware version: %s\n",
 938                device_name, firmware_ver);
 939
 940         kfree(firmware_ver);
 941         kfree(device_name);
 942
 943         usb_fill_bulk_urb(priv->ack, dev, usb_sndbulkpipe(dev, output_ep),
 944                           priv->ack_buf, sizeof(nexio_ack_pkt),
 945                           nexio_ack_complete, usbtouch);
 946         ret = 0;
 947
 948 out_buf:
 949         kfree(buf);
 950         return ret;
 951 }
 952
 953 static void nexio_exit(struct usbtouch_usb *usbtouch)
 954 {
 955         struct nexio_priv *priv = usbtouch->priv;
 956
 957         usb_kill_urb(priv->ack);
 958         usb_free_urb(priv->ack);
 959         kfree(priv->ack_buf);
 960         kfree(priv);
 961 }
 962
 963 static int nexio_read_data(struct usbtouch_usb *usbtouch, unsigned char *pkt)
 964 {
 965         struct nexio_touch_packet *packet = (void *) pkt;
 966         struct nexio_priv *priv = usbtouch->priv;
 967         unsigned int data_len = be16_to_cpu(packet->data_len);
 968         unsigned int x_len = be16_to_cpu(packet->x_len);
 969         unsigned int y_len = be16_to_cpu(packet->y_len);
 970         int x, y, begin_x, begin_y, end_x, end_y, w, h, ret;
 971
 972         /* got touch data? */
 973         if ((pkt[0] & 0xe0) != 0xe0)
 974                 return 0;
 975
 976         if (data_len > 0xff)
 977                 data_len -= 0x100;
 978         if (x_len > 0xff)
 979                 x_len -= 0x80;
 980
 981         /* send ACK */
 982         ret = usb_submit_urb(priv->ack, GFP_ATOMIC);
 983
 984         if (!usbtouch->type->max_xc) {
 985                 usbtouch->type->max_xc = 2 * x_len;
 986                 input_set_abs_params(usbtouch->input, ABS_X,
 987                                      0, usbtouch->type->max_xc, 0, 0);
 988                 usbtouch->type->max_yc = 2 * y_len;
 989                 input_set_abs_params(usbtouch->input, ABS_Y,
 990                                      0, usbtouch->type->max_yc, 0, 0);
 991         }
 992         /*
 993          * The device reports state of IR sensors on X and Y axes.
 994          * Each byte represents "darkness" percentage (0-100) of one element.
 995          * 17" touchscreen reports only 64 x 52 bytes so the resolution is low.
 996          * This also means that there's a limited multi-touch capability but
 997          * it's disabled (and untested) here as there's no X driver for that.
 998          */
 999         begin_x = end_x = begin_y = end_y = -1;
1000         for (x = 0; x < x_len; x++) {
1001                 if (begin_x == -1 && packet->data[x] > NEXIO_THRESHOLD) {
1002                         begin_x = x;
1003                         continue;
1004                 }
1005                 if (end_x == -1 && begin_x != -1 && packet->data[x] < NEXIO_THRESHOLD) {
1006                         end_x = x - 1;
1007                         for (y = x_len; y < data_len; y++) {
1008                                 if (begin_y == -1 && packet->data[y] > NEXIO_THRESHOLD) {
1009                                         begin_y = y - x_len;
1010                                         continue;
1011                                 }
1012                                 if (end_y == -1 &&
1013                                     begin_y != -1 && packet->data[y] < NEXIO_THRESHOLD) {
1014                                         end_y = y - 1 - x_len;
1015                                         w = end_x - begin_x;
1016                                         h = end_y - begin_y;
1017 #if 0
1018                                         /* multi-touch */
1019                                         input_report_abs(usbtouch->input,
1020                                                     ABS_MT_TOUCH_MAJOR, max(w,h));
1021                                         input_report_abs(usbtouch->input,
1022                                                     ABS_MT_TOUCH_MINOR, min(x,h));
1023                                         input_report_abs(usbtouch->input,
1024                                                     ABS_MT_POSITION_X, 2*begin_x+w);
1025                                         input_report_abs(usbtouch->input,
1026                                                     ABS_MT_POSITION_Y, 2*begin_y+h);
1027                                         input_report_abs(usbtouch->input,
1028                                                     ABS_MT_ORIENTATION, w > h);
1029                                         input_mt_sync(usbtouch->input);
1030 #endif
1031                                         /* single touch */
1032                                         usbtouch->x = 2 * begin_x + w;
1033                                         usbtouch->y = 2 * begin_y + h;
1034                                         usbtouch->touch = packet->flags & 0x01;
1035                                         begin_y = end_y = -1;
1036                                         return 1;
1037                                 }
1038                         }
1039                         begin_x = end_x = -1;
1040                 }
1041
1042         }
1043         return 0;
1044 }
1045 #endif
1046
1047
1048 /*****************************************************************************
1049  * ELO part
1050  */
1051
1052 #ifdef CONFIG_TOUCHSCREEN_USB_ELO
1053
1054 static int elo_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
1055 {
1056         dev->x = (pkt[3] << 8) | pkt[2];
1057         dev->y = (pkt[5] << 8) | pkt[4];
1058         dev->touch = pkt[6] > 0;
1059         dev->press = pkt[6];
1060
1061         return 1;
1062 }
1063 #endif
1064
1065
1066 /*****************************************************************************
1067  * the different device descriptors
1068  */
1069 #ifdef MULTI_PACKET
1070 static void usbtouch_process_multi(struct usbtouch_usb *usbtouch,
1071                                    unsigned char *pkt, int len);
1072 #endif
1073
1074 static struct usbtouch_device_info usbtouch_dev_info[] = {
1075 #ifdef CONFIG_TOUCHSCREEN_USB_ELO
1076         [DEVTYPE_ELO] = {
1077                 .min_xc         = 0x0,
1078                 .max_xc         = 0x0fff,
1079                 .min_yc         = 0x0,
1080                 .max_yc         = 0x0fff,
1081                 .max_press      = 0xff,
1082                 .rept_size      = 8,
1083                 .read_data      = elo_read_data,
1084         },
1085 #endif
1086
1087 #ifdef CONFIG_TOUCHSCREEN_USB_EGALAX
1088         [DEVTYPE_EGALAX] = {
1089                 .min_xc         = 0x0,
1090                 .max_xc         = 0x07ff,
1091                 .min_yc         = 0x0,
1092                 .max_yc         = 0x07ff,
1093                 .rept_size      = 16,
1094                 .process_pkt    = usbtouch_process_multi,
1095                 .get_pkt_len    = egalax_get_pkt_len,
1096                 .read_data      = egalax_read_data,
1097                 .init           = egalax_init,
1098         },
1099 #endif
1100
1101 #ifdef CONFIG_TOUCHSCREEN_USB_PANJIT
1102         [DEVTYPE_PANJIT] = {
1103                 .min_xc         = 0x0,
1104                 .max_xc         = 0x0fff,
1105                 .min_yc         = 0x0,
1106                 .max_yc         = 0x0fff,
1107                 .rept_size      = 8,
1108                 .read_data      = panjit_read_data,
1109         },
1110 #endif
1111
1112 #ifdef CONFIG_TOUCHSCREEN_USB_3M
1113         [DEVTYPE_3M] = {
1114                 .min_xc         = 0x0,
1115                 .max_xc         = 0x4000,
1116                 .min_yc         = 0x0,
1117                 .max_yc         = 0x4000,
1118                 .rept_size      = 11,
1119                 .read_data      = mtouch_read_data,
1120                 .init           = mtouch_init,
1121         },
1122 #endif
1123
1124 #ifdef CONFIG_TOUCHSCREEN_USB_ITM
1125         [DEVTYPE_ITM] = {
1126                 .min_xc         = 0x0,
1127                 .max_xc         = 0x0fff,
1128                 .min_yc         = 0x0,
1129                 .max_yc         = 0x0fff,
1130                 .max_press      = 0xff,
1131                 .rept_size      = 8,
1132                 .read_data      = itm_read_data,
1133         },
1134 #endif
1135
1136 #ifdef CONFIG_TOUCHSCREEN_USB_ETURBO
1137         [DEVTYPE_ETURBO] = {
1138                 .min_xc         = 0x0,
1139                 .max_xc         = 0x07ff,
1140                 .min_yc         = 0x0,
1141                 .max_yc         = 0x07ff,
1142                 .rept_size      = 8,
1143                 .process_pkt    = usbtouch_process_multi,
1144                 .get_pkt_len    = eturbo_get_pkt_len,
1145                 .read_data      = eturbo_read_data,
1146         },
1147 #endif
1148
1149 #ifdef CONFIG_TOUCHSCREEN_USB_GUNZE
1150         [DEVTYPE_GUNZE] = {
1151                 .min_xc         = 0x0,
1152                 .max_xc         = 0x0fff,
1153                 .min_yc         = 0x0,
1154                 .max_yc         = 0x0fff,
1155                 .rept_size      = 4,
1156                 .read_data      = gunze_read_data,
1157         },
1158 #endif
1159
1160 #ifdef CONFIG_TOUCHSCREEN_USB_DMC_TSC10
1161         [DEVTYPE_DMC_TSC10] = {
1162                 .min_xc         = 0x0,
1163                 .max_xc         = 0x03ff,
1164                 .min_yc         = 0x0,
1165                 .max_yc         = 0x03ff,
1166                 .rept_size      = 5,
1167                 .init           = dmc_tsc10_init,
1168                 .read_data      = dmc_tsc10_read_data,
1169         },
1170 #endif
1171
1172 #ifdef CONFIG_TOUCHSCREEN_USB_IRTOUCH
1173         [DEVTYPE_IRTOUCH] = {
1174                 .min_xc         = 0x0,
1175                 .max_xc         = 0x0fff,
1176                 .min_yc         = 0x0,
1177                 .max_yc         = 0x0fff,
1178                 .rept_size      = 8,
1179                 .read_data      = irtouch_read_data,
1180         },
1181 #endif
1182
1183 #ifdef CONFIG_TOUCHSCREEN_USB_IDEALTEK
1184         [DEVTYPE_IDEALTEK] = {
1185                 .min_xc         = 0x0,
1186                 .max_xc         = 0x0fff,
1187                 .min_yc         = 0x0,
1188                 .max_yc         = 0x0fff,
1189                 .rept_size      = 8,
1190                 .process_pkt    = usbtouch_process_multi,
1191                 .get_pkt_len    = idealtek_get_pkt_len,
1192                 .read_data      = idealtek_read_data,
1193         },
1194 #endif
1195
1196 #ifdef CONFIG_TOUCHSCREEN_USB_GENERAL_TOUCH
1197         [DEVTYPE_GENERAL_TOUCH] = {
1198                 .min_xc         = 0x0,
1199                 .max_xc         = 0x7fff,
1200                 .min_yc         = 0x0,
1201                 .max_yc         = 0x7fff,
1202                 .rept_size      = 7,
1203                 .read_data      = general_touch_read_data,
1204         },
1205 #endif
1206
1207 #ifdef CONFIG_TOUCHSCREEN_USB_GOTOP
1208         [DEVTYPE_GOTOP] = {
1209                 .min_xc         = 0x0,
1210                 .max_xc         = 0x03ff,
1211                 .min_yc         = 0x0,
1212                 .max_yc         = 0x03ff,
1213                 .rept_size      = 4,
1214                 .read_data      = gotop_read_data,
1215         },
1216 #endif
1217
1218 #ifdef CONFIG_TOUCHSCREEN_USB_JASTEC
1219         [DEVTYPE_JASTEC] = {
1220                 .min_xc         = 0x0,
1221                 .max_xc         = 0x0fff,
1222                 .min_yc         = 0x0,
1223                 .max_yc         = 0x0fff,
1224                 .rept_size      = 4,
1225                 .read_data      = jastec_read_data,
1226         },
1227 #endif
1228
1229 #ifdef CONFIG_TOUCHSCREEN_USB_E2I
1230         [DEVTYPE_E2I] = {
1231                 .min_xc         = 0x0,
1232                 .max_xc         = 0x7fff,
1233                 .min_yc         = 0x0,
1234                 .max_yc         = 0x7fff,
1235                 .rept_size      = 6,
1236                 .init           = e2i_init,
1237                 .read_data      = e2i_read_data,
1238         },
1239 #endif
1240
1241 #ifdef CONFIG_TOUCHSCREEN_USB_ZYTRONIC
1242         [DEVTYPE_ZYTRONIC] = {
1243                 .min_xc         = 0x0,
1244                 .max_xc         = 0x03ff,
1245                 .min_yc         = 0x0,
1246                 .max_yc         = 0x03ff,
1247                 .rept_size      = 5,
1248                 .read_data      = zytronic_read_data,
1249                 .irq_always     = true,
1250         },
1251 #endif
1252
1253 #ifdef CONFIG_TOUCHSCREEN_USB_ETT_TC45USB
1254         [DEVTYPE_TC45USB] = {
1255                 .min_xc         = 0x0,
1256                 .max_xc         = 0x0fff,
1257                 .min_yc         = 0x0,
1258                 .max_yc         = 0x0fff,
1259                 .rept_size      = 5,
1260                 .read_data      = tc45usb_read_data,
1261         },
1262 #endif
1263
1264 #ifdef CONFIG_TOUCHSCREEN_USB_NEXIO
1265         [DEVTYPE_NEXIO] = {
1266                 .rept_size      = 1024,
1267                 .irq_always     = true,
1268                 .read_data      = nexio_read_data,
1269                 .alloc          = nexio_alloc,
1270                 .init           = nexio_init,
1271                 .exit           = nexio_exit,
1272         },
1273 #endif
1274 #ifdef CONFIG_TOUCHSCREEN_USB_EASYTOUCH
1275         [DEVTYPE_ETOUCH] = {
1276                 .min_xc         = 0x0,
1277                 .max_xc         = 0x07ff,
1278                 .min_yc         = 0x0,
1279                 .max_yc         = 0x07ff,
1280                 .rept_size      = 16,
1281                 .process_pkt    = usbtouch_process_multi,
1282                 .get_pkt_len    = etouch_get_pkt_len,
1283                 .read_data      = etouch_read_data,
1284         },
1285 #endif
1286 };
1287
1288
1289 /*****************************************************************************
1290  * Generic Part
1291  */
1292 static void usbtouch_process_pkt(struct usbtouch_usb *usbtouch,
1293                                  unsigned char *pkt, int len)
1294 {
1295         struct usbtouch_device_info *type = usbtouch->type;
1296
1297         if (!type->read_data(usbtouch, pkt))
1298                         return;
1299
1300         input_report_key(usbtouch->input, BTN_TOUCH, usbtouch->touch);
1301
1302         if (swap_xy) {
1303                 input_report_abs(usbtouch->input, ABS_X, usbtouch->y);
1304                 input_report_abs(usbtouch->input, ABS_Y, usbtouch->x);
1305         } else {
1306                 input_report_abs(usbtouch->input, ABS_X, usbtouch->x);
1307                 input_report_abs(usbtouch->input, ABS_Y, usbtouch->y);
1308         }
1309         if (type->max_press)
1310                 input_report_abs(usbtouch->input, ABS_PRESSURE, usbtouch->press);
1311         input_sync(usbtouch->input);
1312 }
1313
1314
1315 #ifdef MULTI_PACKET
1316 static void usbtouch_process_multi(struct usbtouch_usb *usbtouch,
1317                                    unsigned char *pkt, int len)
1318 {
1319         unsigned char *buffer;
1320         int pkt_len, pos, buf_len, tmp;
1321
1322         /* process buffer */
1323         if (unlikely(usbtouch->buf_len)) {
1324                 /* try to get size */
1325                 pkt_len = usbtouch->type->get_pkt_len(
1326                                 usbtouch->buffer, usbtouch->buf_len);
1327
1328                 /* drop? */
1329                 if (unlikely(!pkt_len))
1330                         goto out_flush_buf;
1331
1332                 /* need to append -pkt_len bytes before able to get size */
1333                 if (unlikely(pkt_len < 0)) {
1334                         int append = -pkt_len;
1335                         if (unlikely(append > len))
1336                                append = len;
1337                         if (usbtouch->buf_len + append >= usbtouch->type->rept_size)
1338                                 goto out_flush_buf;
1339                         memcpy(usbtouch->buffer + usbtouch->buf_len, pkt, append);
1340                         usbtouch->buf_len += append;
1341
1342                         pkt_len = usbtouch->type->get_pkt_len(
1343                                         usbtouch->buffer, usbtouch->buf_len);
1344                         if (pkt_len < 0)
1345                                 return;
1346                 }
1347
1348                 /* append */
1349                 tmp = pkt_len - usbtouch->buf_len;
1350                 if (usbtouch->buf_len + tmp >= usbtouch->type->rept_size)
1351                         goto out_flush_buf;
1352                 memcpy(usbtouch->buffer + usbtouch->buf_len, pkt, tmp);
1353                 usbtouch_process_pkt(usbtouch, usbtouch->buffer, pkt_len);
1354
1355                 buffer = pkt + tmp;
1356                 buf_len = len - tmp;
1357         } else {
1358                 buffer = pkt;
1359                 buf_len = len;
1360         }
1361
1362         /* loop over the received packet, process */
1363         pos = 0;
1364         while (pos < buf_len) {
1365                 /* get packet len */
1366                 pkt_len = usbtouch->type->get_pkt_len(buffer + pos,
1367                                                         buf_len - pos);
1368
1369                 /* unknown packet: skip one byte */
1370                 if (unlikely(!pkt_len)) {
1371                         pos++;
1372                         continue;
1373                 }
1374
1375                 /* full packet: process */
1376                 if (likely((pkt_len > 0) && (pkt_len <= buf_len - pos))) {
1377                         usbtouch_process_pkt(usbtouch, buffer + pos, pkt_len);
1378                 } else {
1379                         /* incomplete packet: save in buffer */
1380                         memcpy(usbtouch->buffer, buffer + pos, buf_len - pos);
1381                         usbtouch->buf_len = buf_len - pos;
1382                         return;
1383                 }
1384                 pos += pkt_len;
1385         }
1386
1387 out_flush_buf:
1388         usbtouch->buf_len = 0;
1389         return;
1390 }
1391 #endif
1392
1393
1394 static void usbtouch_irq(struct urb *urb)
1395 {
1396         struct usbtouch_usb *usbtouch = urb->context;
1397         struct device *dev = &usbtouch->interface->dev;
1398         int retval;
1399
1400         switch (urb->status) {
1401         case 0:
1402                 /* success */
1403                 break;
1404         case -ETIME:
1405                 /* this urb is timing out */
1406                 dev_dbg(dev,
1407                         "%s - urb timed out - was the device unplugged?\n",
1408                         __func__);
1409                 return;
1410         case -ECONNRESET:
1411         case -ENOENT:
1412         case -ESHUTDOWN:
1413         case -EPIPE:
1414                 /* this urb is terminated, clean up */
1415                 dev_dbg(dev, "%s - urb shutting down with status: %d\n",
1416                         __func__, urb->status);
1417                 return;
1418         default:
1419                 dev_dbg(dev, "%s - nonzero urb status received: %d\n",
1420                         __func__, urb->status);
1421                 goto exit;
1422         }
1423
1424         usbtouch->type->process_pkt(usbtouch, usbtouch->data, urb->actual_length);
1425
1426 exit:
1427         usb_mark_last_busy(interface_to_usbdev(usbtouch->interface));
1428         retval = usb_submit_urb(urb, GFP_ATOMIC);
1429         if (retval)
1430                 dev_err(dev, "%s - usb_submit_urb failed with result: %d\n",
1431                         __func__, retval);
1432 }
1433
1434 static int usbtouch_open(struct input_dev *input)
1435 {
1436         struct usbtouch_usb *usbtouch = input_get_drvdata(input);
1437         int r;
1438
1439         usbtouch->irq->dev = interface_to_usbdev(usbtouch->interface);
1440
1441         r = usb_autopm_get_interface(usbtouch->interface) ? -EIO : 0;
1442         if (r < 0)
1443                 goto out;
1444
1445         if (!usbtouch->type->irq_always) {
1446                 if (usb_submit_urb(usbtouch->irq, GFP_KERNEL)) {
1447                         r = -EIO;
1448                         goto out_put;
1449                 }
1450         }
1451
1452         usbtouch->interface->needs_remote_wakeup = 1;
1453 out_put:
1454         usb_autopm_put_interface(usbtouch->interface);
1455 out:
1456         return r;
1457 }
1458
1459 static void usbtouch_close(struct input_dev *input)
1460 {
1461         struct usbtouch_usb *usbtouch = input_get_drvdata(input);
1462         int r;
1463
1464         if (!usbtouch->type->irq_always)
1465                 usb_kill_urb(usbtouch->irq);
1466         r = usb_autopm_get_interface(usbtouch->interface);
1467         usbtouch->interface->needs_remote_wakeup = 0;
1468         if (!r)
1469                 usb_autopm_put_interface(usbtouch->interface);
1470 }
1471
1472 static int usbtouch_suspend
1473 (struct usb_interface *intf, pm_message_t message)
1474 {
1475         struct usbtouch_usb *usbtouch = usb_get_intfdata(intf);
1476
1477         usb_kill_urb(usbtouch->irq);
1478
1479         return 0;
1480 }
1481
1482 static int usbtouch_resume(struct usb_interface *intf)
1483 {
1484         struct usbtouch_usb *usbtouch = usb_get_intfdata(intf);
1485         struct input_dev *input = usbtouch->input;
1486         int result = 0;
1487
1488         mutex_lock(&input->mutex);
1489         if (input->users || usbtouch->type->irq_always)
1490                 result = usb_submit_urb(usbtouch->irq, GFP_NOIO);
1491         mutex_unlock(&input->mutex);
1492
1493         return result;
1494 }
1495
1496 static int usbtouch_reset_resume(struct usb_interface *intf)
1497 {
1498         struct usbtouch_usb *usbtouch = usb_get_intfdata(intf);
1499         struct input_dev *input = usbtouch->input;
1500         int err = 0;
1501
1502         /* reinit the device */
1503         if (usbtouch->type->init) {
1504                 err = usbtouch->type->init(usbtouch);
1505                 if (err) {
1506                         dev_dbg(&intf->dev,
1507                                 "%s - type->init() failed, err: %d\n",
1508                                 __func__, err);
1509                         return err;
1510                 }
1511         }
1512
1513         /* restart IO if needed */
1514         mutex_lock(&input->mutex);
1515         if (input->users)
1516                 err = usb_submit_urb(usbtouch->irq, GFP_NOIO);
1517         mutex_unlock(&input->mutex);
1518
1519         return err;
1520 }
1521
1522 static void usbtouch_free_buffers(struct usb_device *udev,
1523                                   struct usbtouch_usb *usbtouch)
1524 {
1525         usb_free_coherent(udev, usbtouch->data_size,
1526                           usbtouch->data, usbtouch->data_dma);
1527         kfree(usbtouch->buffer);
1528 }
1529
1530 static struct usb_endpoint_descriptor *
1531 usbtouch_get_input_endpoint(struct usb_host_interface *interface)
1532 {
1533         int i;
1534
1535         for (i = 0; i < interface->desc.bNumEndpoints; i++)
1536                 if (usb_endpoint_dir_in(&interface->endpoint[i].desc))
1537                         return &interface->endpoint[i].desc;
1538
1539         return NULL;
1540 }
1541
1542 static int usbtouch_probe(struct usb_interface *intf,
1543                           const struct usb_device_id *id)
1544 {
1545         struct usbtouch_usb *usbtouch;
1546         struct input_dev *input_dev;
1547         struct usb_endpoint_descriptor *endpoint;
1548         struct usb_device *udev = interface_to_usbdev(intf);
1549         struct usbtouch_device_info *type;
1550         int err = -ENOMEM;
1551
1552         /* some devices are ignored */
1553         if (id->driver_info == DEVTYPE_IGNORE)
1554                 return -ENODEV;
1555
1556         endpoint = usbtouch_get_input_endpoint(intf->cur_altsetting);
1557         if (!endpoint)
1558                 return -ENXIO;
1559
1560         usbtouch = kzalloc(sizeof(struct usbtouch_usb), GFP_KERNEL);
1561         input_dev = input_allocate_device();
1562         if (!usbtouch || !input_dev)
1563                 goto out_free;
1564
1565         type = &usbtouch_dev_info[id->driver_info];
1566         usbtouch->type = type;
1567         if (!type->process_pkt)
1568                 type->process_pkt = usbtouch_process_pkt;
1569
1570         usbtouch->data_size = type->rept_size;
1571         if (type->get_pkt_len) {
1572                 /*
1573                  * When dealing with variable-length packets we should
1574                  * not request more than wMaxPacketSize bytes at once
1575                  * as we do not know if there is more data coming or
1576                  * we filled exactly wMaxPacketSize bytes and there is
1577                  * nothing else.
1578                  */
1579                 usbtouch->data_size = min(usbtouch->data_size,
1580                                           usb_endpoint_maxp(endpoint));
1581         }
1582
1583         usbtouch->data = usb_alloc_coherent(udev, usbtouch->data_size,
1584                                             GFP_KERNEL, &usbtouch->data_dma);
1585         if (!usbtouch->data)
1586                 goto out_free;
1587
1588         if (type->get_pkt_len) {
1589                 usbtouch->buffer = kmalloc(type->rept_size, GFP_KERNEL);
1590                 if (!usbtouch->buffer)
1591                         goto out_free_buffers;
1592         }
1593
1594         usbtouch->irq = usb_alloc_urb(0, GFP_KERNEL);
1595         if (!usbtouch->irq) {
1596                 dev_dbg(&intf->dev,
1597                         "%s - usb_alloc_urb failed: usbtouch->irq\n", __func__);
1598                 goto out_free_buffers;
1599         }
1600
1601         usbtouch->interface = intf;
1602         usbtouch->input = input_dev;
1603
1604         if (udev->manufacturer)
1605                 strlcpy(usbtouch->name, udev->manufacturer, sizeof(usbtouch->name));
1606
1607         if (udev->product) {
1608                 if (udev->manufacturer)
1609                         strlcat(usbtouch->name, " ", sizeof(usbtouch->name));
1610                 strlcat(usbtouch->name, udev->product, sizeof(usbtouch->name));
1611         }
1612
1613         if (!strlen(usbtouch->name))
1614                 snprintf(usbtouch->name, sizeof(usbtouch->name),
1615                         "USB Touchscreen %04x:%04x",
1616                          le16_to_cpu(udev->descriptor.idVendor),
1617                          le16_to_cpu(udev->descriptor.idProduct));
1618
1619         usb_make_path(udev, usbtouch->phys, sizeof(usbtouch->phys));
1620         strlcat(usbtouch->phys, "/input0", sizeof(usbtouch->phys));
1621
1622         input_dev->name = usbtouch->name;
1623         input_dev->phys = usbtouch->phys;
1624         usb_to_input_id(udev, &input_dev->id);
1625         input_dev->dev.parent = &intf->dev;
1626
1627         input_set_drvdata(input_dev, usbtouch);
1628
1629         input_dev->open = usbtouch_open;
1630         input_dev->close = usbtouch_close;
1631
1632         input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
1633         input_dev->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH);
1634         input_set_abs_params(input_dev, ABS_X, type->min_xc, type->max_xc, 0, 0);
1635         input_set_abs_params(input_dev, ABS_Y, type->min_yc, type->max_yc, 0, 0);
1636         if (type->max_press)
1637                 input_set_abs_params(input_dev, ABS_PRESSURE, type->min_press,
1638                                      type->max_press, 0, 0);
1639
1640         if (usb_endpoint_type(endpoint) == USB_ENDPOINT_XFER_INT)
1641                 usb_fill_int_urb(usbtouch->irq, udev,
1642                          usb_rcvintpipe(udev, endpoint->bEndpointAddress),
1643                          usbtouch->data, usbtouch->data_size,
1644                          usbtouch_irq, usbtouch, endpoint->bInterval);
1645         else
1646                 usb_fill_bulk_urb(usbtouch->irq, udev,
1647                          usb_rcvbulkpipe(udev, endpoint->bEndpointAddress),
1648                          usbtouch->data, usbtouch->data_size,
1649                          usbtouch_irq, usbtouch);
1650
1651         usbtouch->irq->dev = udev;
1652         usbtouch->irq->transfer_dma = usbtouch->data_dma;
1653         usbtouch->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1654
1655         /* device specific allocations */
1656         if (type->alloc) {
1657                 err = type->alloc(usbtouch);
1658                 if (err) {
1659                         dev_dbg(&intf->dev,
1660                                 "%s - type->alloc() failed, err: %d\n",
1661                                 __func__, err);
1662                         goto out_free_urb;
1663                 }
1664         }
1665
1666         /* device specific initialisation*/
1667         if (type->init) {
1668                 err = type->init(usbtouch);
1669                 if (err) {
1670                         dev_dbg(&intf->dev,
1671                                 "%s - type->init() failed, err: %d\n",
1672                                 __func__, err);
1673                         goto out_do_exit;
1674                 }
1675         }
1676
1677         err = input_register_device(usbtouch->input);
1678         if (err) {
1679                 dev_dbg(&intf->dev,
1680                         "%s - input_register_device failed, err: %d\n",
1681                         __func__, err);
1682                 goto out_do_exit;
1683         }
1684
1685         usb_set_intfdata(intf, usbtouch);
1686
1687         if (usbtouch->type->irq_always) {
1688                 /* this can't fail */
1689                 usb_autopm_get_interface(intf);
1690                 err = usb_submit_urb(usbtouch->irq, GFP_KERNEL);
1691                 if (err) {
1692                         usb_autopm_put_interface(intf);
1693                         dev_err(&intf->dev,
1694                                 "%s - usb_submit_urb failed with result: %d\n",
1695                                 __func__, err);
1696                         goto out_unregister_input;
1697                 }
1698         }
1699
1700         return 0;
1701
1702 out_unregister_input:
1703         input_unregister_device(input_dev);
1704         input_dev = NULL;
1705 out_do_exit:
1706         if (type->exit)
1707                 type->exit(usbtouch);
1708 out_free_urb:
1709         usb_free_urb(usbtouch->irq);
1710 out_free_buffers:
1711         usbtouch_free_buffers(udev, usbtouch);
1712 out_free:
1713         input_free_device(input_dev);
1714         kfree(usbtouch);
1715         return err;
1716 }
1717
1718 static void usbtouch_disconnect(struct usb_interface *intf)
1719 {
1720         struct usbtouch_usb *usbtouch = usb_get_intfdata(intf);
1721
1722         if (!usbtouch)
1723                 return;
1724
1725         dev_dbg(&intf->dev,
1726                 "%s - usbtouch is initialized, cleaning up\n", __func__);
1727
1728         usb_set_intfdata(intf, NULL);
1729         /* this will stop IO via close */
1730         input_unregister_device(usbtouch->input);
1731         usb_free_urb(usbtouch->irq);
1732         if (usbtouch->type->exit)
1733                 usbtouch->type->exit(usbtouch);
1734         usbtouch_free_buffers(interface_to_usbdev(intf), usbtouch);
1735         kfree(usbtouch);
1736 }
1737
1738 MODULE_DEVICE_TABLE(usb, usbtouch_devices);
1739
1740 static struct usb_driver usbtouch_driver = {
1741         .name           = "usbtouchscreen",
1742         .probe          = usbtouch_probe,
1743         .disconnect     = usbtouch_disconnect,
1744         .suspend        = usbtouch_suspend,
1745         .resume         = usbtouch_resume,
1746         .reset_resume   = usbtouch_reset_resume,
1747         .id_table       = usbtouch_devices,
1748         .supports_autosuspend = 1,
1749 };
1750
1751 module_usb_driver(usbtouch_driver);
1752
1753 MODULE_AUTHOR(DRIVER_AUTHOR);
1754 MODULE_DESCRIPTION(DRIVER_DESC);
1755 MODULE_LICENSE("GPL");
1756
1757 MODULE_ALIAS("touchkitusb");
1758 MODULE_ALIAS("itmtouch");
1759 MODULE_ALIAS("mtouchusb");