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