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         unsigned char *buffer;
 110         int buf_len;
 111         struct urb *irq;
 112         struct usb_interface *interface;
 113         struct input_dev *input;
 114         struct usbtouch_device_info *type;
 115         char name[128];
 116         char phys[64];
 117         void *priv;
 118
 119         int x, y;
 120         int touch, press;
 121 };
 122
 123
 124 /* device types */
 125 enum {
 126         DEVTYPE_IGNORE = -1,
 127         DEVTYPE_EGALAX,
 128         DEVTYPE_PANJIT,
 129         DEVTYPE_3M,
 130         DEVTYPE_ITM,
 131         DEVTYPE_ETURBO,
 132         DEVTYPE_GUNZE,
 133         DEVTYPE_DMC_TSC10,
 134         DEVTYPE_IRTOUCH,
 135         DEVTYPE_IDEALTEK,
 136         DEVTYPE_GENERAL_TOUCH,
 137         DEVTYPE_GOTOP,
 138         DEVTYPE_JASTEC,
 139         DEVTYPE_E2I,
 140         DEVTYPE_ZYTRONIC,
 141         DEVTYPE_TC45USB,
 142         DEVTYPE_NEXIO,
 143         DEVTYPE_ELO,
 144         DEVTYPE_ETOUCH,
 145 };
 146
 147 #define USB_DEVICE_HID_CLASS(vend, prod) \
 148         .match_flags = USB_DEVICE_ID_MATCH_INT_CLASS \
 149                 | USB_DEVICE_ID_MATCH_DEVICE, \
 150         .idVendor = (vend), \
 151         .idProduct = (prod), \
 152         .bInterfaceClass = USB_INTERFACE_CLASS_HID
 153
 154 static const struct usb_device_id usbtouch_devices[] = {
 155 #ifdef CONFIG_TOUCHSCREEN_USB_EGALAX
 156         /* ignore the HID capable devices, handled by usbhid */
 157         {USB_DEVICE_HID_CLASS(0x0eef, 0x0001), .driver_info = DEVTYPE_IGNORE},
 158         {USB_DEVICE_HID_CLASS(0x0eef, 0x0002), .driver_info = DEVTYPE_IGNORE},
 159
 160         /* normal device IDs */
 161         {USB_DEVICE(0x3823, 0x0001), .driver_info = DEVTYPE_EGALAX},
 162         {USB_DEVICE(0x3823, 0x0002), .driver_info = DEVTYPE_EGALAX},
 163         {USB_DEVICE(0x0123, 0x0001), .driver_info = DEVTYPE_EGALAX},
 164         {USB_DEVICE(0x0eef, 0x0001), .driver_info = DEVTYPE_EGALAX},
 165         {USB_DEVICE(0x0eef, 0x0002), .driver_info = DEVTYPE_EGALAX},
 166         {USB_DEVICE(0x1234, 0x0001), .driver_info = DEVTYPE_EGALAX},
 167         {USB_DEVICE(0x1234, 0x0002), .driver_info = DEVTYPE_EGALAX},
 168 #endif
 169
 170 #ifdef CONFIG_TOUCHSCREEN_USB_PANJIT
 171         {USB_DEVICE(0x134c, 0x0001), .driver_info = DEVTYPE_PANJIT},
 172         {USB_DEVICE(0x134c, 0x0002), .driver_info = DEVTYPE_PANJIT},
 173         {USB_DEVICE(0x134c, 0x0003), .driver_info = DEVTYPE_PANJIT},
 174         {USB_DEVICE(0x134c, 0x0004), .driver_info = DEVTYPE_PANJIT},
 175 #endif
 176
 177 #ifdef CONFIG_TOUCHSCREEN_USB_3M
 178         {USB_DEVICE(0x0596, 0x0001), .driver_info = DEVTYPE_3M},
 179 #endif
 180
 181 #ifdef CONFIG_TOUCHSCREEN_USB_ITM
 182         {USB_DEVICE(0x0403, 0xf9e9), .driver_info = DEVTYPE_ITM},
 183         {USB_DEVICE(0x16e3, 0xf9e9), .driver_info = DEVTYPE_ITM},
 184 #endif
 185
 186 #ifdef CONFIG_TOUCHSCREEN_USB_ETURBO
 187         {USB_DEVICE(0x1234, 0x5678), .driver_info = DEVTYPE_ETURBO},
 188 #endif
 189
 190 #ifdef CONFIG_TOUCHSCREEN_USB_GUNZE
 191         {USB_DEVICE(0x0637, 0x0001), .driver_info = DEVTYPE_GUNZE},
 192 #endif
 193
 194 #ifdef CONFIG_TOUCHSCREEN_USB_DMC_TSC10
 195         {USB_DEVICE(0x0afa, 0x03e8), .driver_info = DEVTYPE_DMC_TSC10},
 196 #endif
 197
 198 #ifdef CONFIG_TOUCHSCREEN_USB_IRTOUCH
 199         {USB_DEVICE(0x595a, 0x0001), .driver_info = DEVTYPE_IRTOUCH},
 200         {USB_DEVICE(0x6615, 0x0001), .driver_info = DEVTYPE_IRTOUCH},
 201 #endif
 202
 203 #ifdef CONFIG_TOUCHSCREEN_USB_IDEALTEK
 204         {USB_DEVICE(0x1391, 0x1000), .driver_info = DEVTYPE_IDEALTEK},
 205 #endif
 206
 207 #ifdef CONFIG_TOUCHSCREEN_USB_GENERAL_TOUCH
 208         {USB_DEVICE(0x0dfc, 0x0001), .driver_info = DEVTYPE_GENERAL_TOUCH},
 209 #endif
 210
 211 #ifdef CONFIG_TOUCHSCREEN_USB_GOTOP
 212         {USB_DEVICE(0x08f2, 0x007f), .driver_info = DEVTYPE_GOTOP},
 213         {USB_DEVICE(0x08f2, 0x00ce), .driver_info = DEVTYPE_GOTOP},
 214         {USB_DEVICE(0x08f2, 0x00f4), .driver_info = DEVTYPE_GOTOP},
 215 #endif
 216
 217 #ifdef CONFIG_TOUCHSCREEN_USB_JASTEC
 218         {USB_DEVICE(0x0f92, 0x0001), .driver_info = DEVTYPE_JASTEC},
 219 #endif
 220
 221 #ifdef CONFIG_TOUCHSCREEN_USB_E2I
 222         {USB_DEVICE(0x1ac7, 0x0001), .driver_info = DEVTYPE_E2I},
 223 #endif
 224
 225 #ifdef CONFIG_TOUCHSCREEN_USB_ZYTRONIC
 226         {USB_DEVICE(0x14c8, 0x0003), .driver_info = DEVTYPE_ZYTRONIC},
 227 #endif
 228
 229 #ifdef CONFIG_TOUCHSCREEN_USB_ETT_TC45USB
 230         /* TC5UH */
 231         {USB_DEVICE(0x0664, 0x0309), .driver_info = DEVTYPE_TC45USB},
 232         /* TC4UM */
 233         {USB_DEVICE(0x0664, 0x0306), .driver_info = DEVTYPE_TC45USB},
 234 #endif
 235
 236 #ifdef CONFIG_TOUCHSCREEN_USB_NEXIO
 237         /* data interface only */
 238         {USB_DEVICE_AND_INTERFACE_INFO(0x10f0, 0x2002, 0x0a, 0x00, 0x00),
 239                 .driver_info = DEVTYPE_NEXIO},
 240         {USB_DEVICE_AND_INTERFACE_INFO(0x1870, 0x0001, 0x0a, 0x00, 0x00),
 241                 .driver_info = DEVTYPE_NEXIO},
 242 #endif
 243
 244 #ifdef CONFIG_TOUCHSCREEN_USB_ELO
 245         {USB_DEVICE(0x04e7, 0x0020), .driver_info = DEVTYPE_ELO},
 246 #endif
 247
 248 #ifdef CONFIG_TOUCHSCREEN_USB_EASYTOUCH
 249         {USB_DEVICE(0x7374, 0x0001), .driver_info = DEVTYPE_ETOUCH},
 250 #endif
 251
 252         {}
 253 };
 254
 255
 256 /*****************************************************************************
 257  * e2i Part
 258  */
 259
 260 #ifdef CONFIG_TOUCHSCREEN_USB_E2I
 261 static int e2i_init(struct usbtouch_usb *usbtouch)
 262 {
 263         int ret;
 264         struct usb_device *udev = interface_to_usbdev(usbtouch->interface);
 265
 266         ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
 267                               0x01, 0x02, 0x0000, 0x0081,
 268                               NULL, 0, USB_CTRL_SET_TIMEOUT);
 269
 270         dev_dbg(&usbtouch->interface->dev,
 271                 "%s - usb_control_msg - E2I_RESET - bytes|err: %d\n",
 272                 __func__, ret);
 273         return ret;
 274 }
 275
 276 static int e2i_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 277 {
 278         int tmp = (pkt[0] << 8) | pkt[1];
 279         dev->x  = (pkt[2] << 8) | pkt[3];
 280         dev->y  = (pkt[4] << 8) | pkt[5];
 281
 282         tmp = tmp - 0xA000;
 283         dev->touch = (tmp > 0);
 284         dev->press = (tmp > 0 ? tmp : 0);
 285
 286         return 1;
 287 }
 288 #endif
 289
 290
 291 /*****************************************************************************
 292  * eGalax part
 293  */
 294
 295 #ifdef CONFIG_TOUCHSCREEN_USB_EGALAX
 296
 297 #ifndef MULTI_PACKET
 298 #define MULTI_PACKET
 299 #endif
 300
 301 #define EGALAX_PKT_TYPE_MASK            0xFE
 302 #define EGALAX_PKT_TYPE_REPT            0x80
 303 #define EGALAX_PKT_TYPE_DIAG            0x0A
 304
 305 static int egalax_init(struct usbtouch_usb *usbtouch)
 306 {
 307         int ret, i;
 308         unsigned char *buf;
 309         struct usb_device *udev = interface_to_usbdev(usbtouch->interface);
 310
 311         /*
 312          * An eGalax diagnostic packet kicks the device into using the right
 313          * protocol.  We send a "check active" packet.  The response will be
 314          * read later and ignored.
 315          */
 316
 317         buf = kmalloc(3, GFP_KERNEL);
 318         if (!buf)
 319                 return -ENOMEM;
 320
 321         buf[0] = EGALAX_PKT_TYPE_DIAG;
 322         buf[1] = 1;     /* length */
 323         buf[2] = 'A';   /* command - check active */
 324
 325         for (i = 0; i < 3; i++) {
 326                 ret = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
 327                                       0,
 328                                       USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 329                                       0, 0, buf, 3,
 330                                       USB_CTRL_SET_TIMEOUT);
 331                 if (ret >= 0) {
 332                         ret = 0;
 333                         break;
 334                 }
 335                 if (ret != -EPIPE)
 336                         break;
 337         }
 338
 339         kfree(buf);
 340
 341         return ret;
 342 }
 343
 344 static int egalax_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 345 {
 346         if ((pkt[0] & EGALAX_PKT_TYPE_MASK) != EGALAX_PKT_TYPE_REPT)
 347                 return 0;
 348
 349         dev->x = ((pkt[3] & 0x0F) << 7) | (pkt[4] & 0x7F);
 350         dev->y = ((pkt[1] & 0x0F) << 7) | (pkt[2] & 0x7F);
 351         dev->touch = pkt[0] & 0x01;
 352
 353         return 1;
 354 }
 355
 356 static int egalax_get_pkt_len(unsigned char *buf, int len)
 357 {
 358         switch (buf[0] & EGALAX_PKT_TYPE_MASK) {
 359         case EGALAX_PKT_TYPE_REPT:
 360                 return 5;
 361
 362         case EGALAX_PKT_TYPE_DIAG:
 363                 if (len < 2)
 364                         return -1;
 365
 366                 return buf[1] + 2;
 367         }
 368
 369         return 0;
 370 }
 371 #endif
 372
 373 /*****************************************************************************
 374  * EasyTouch part
 375  */
 376
 377 #ifdef CONFIG_TOUCHSCREEN_USB_EASYTOUCH
 378
 379 #ifndef MULTI_PACKET
 380 #define MULTI_PACKET
 381 #endif
 382
 383 #define ETOUCH_PKT_TYPE_MASK            0xFE
 384 #define ETOUCH_PKT_TYPE_REPT            0x80
 385 #define ETOUCH_PKT_TYPE_REPT2           0xB0
 386 #define ETOUCH_PKT_TYPE_DIAG            0x0A
 387
 388 static int etouch_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 389 {
 390         if ((pkt[0] & ETOUCH_PKT_TYPE_MASK) != ETOUCH_PKT_TYPE_REPT &&
 391                 (pkt[0] & ETOUCH_PKT_TYPE_MASK) != ETOUCH_PKT_TYPE_REPT2)
 392                 return 0;
 393
 394         dev->x = ((pkt[1] & 0x1F) << 7) | (pkt[2] & 0x7F);
 395         dev->y = ((pkt[3] & 0x1F) << 7) | (pkt[4] & 0x7F);
 396         dev->touch = pkt[0] & 0x01;
 397
 398         return 1;
 399 }
 400
 401 static int etouch_get_pkt_len(unsigned char *buf, int len)
 402 {
 403         switch (buf[0] & ETOUCH_PKT_TYPE_MASK) {
 404         case ETOUCH_PKT_TYPE_REPT:
 405         case ETOUCH_PKT_TYPE_REPT2:
 406                 return 5;
 407
 408         case ETOUCH_PKT_TYPE_DIAG:
 409                 if (len < 2)
 410                         return -1;
 411
 412                 return buf[1] + 2;
 413         }
 414
 415         return 0;
 416 }
 417 #endif
 418
 419 /*****************************************************************************
 420  * PanJit Part
 421  */
 422 #ifdef CONFIG_TOUCHSCREEN_USB_PANJIT
 423 static int panjit_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 424 {
 425         dev->x = ((pkt[2] & 0x0F) << 8) | pkt[1];
 426         dev->y = ((pkt[4] & 0x0F) << 8) | pkt[3];
 427         dev->touch = pkt[0] & 0x01;
 428
 429         return 1;
 430 }
 431 #endif
 432
 433
 434 /*****************************************************************************
 435  * 3M/Microtouch Part
 436  */
 437 #ifdef CONFIG_TOUCHSCREEN_USB_3M
 438
 439 #define MTOUCHUSB_ASYNC_REPORT          1
 440 #define MTOUCHUSB_RESET                 7
 441 #define MTOUCHUSB_REQ_CTRLLR_ID         10
 442
 443 static int mtouch_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 444 {
 445         if (hwcalib_xy) {
 446                 dev->x = (pkt[4] << 8) | pkt[3];
 447                 dev->y = 0xffff - ((pkt[6] << 8) | pkt[5]);
 448         } else {
 449                 dev->x = (pkt[8] << 8) | pkt[7];
 450                 dev->y = (pkt[10] << 8) | pkt[9];
 451         }
 452         dev->touch = (pkt[2] & 0x40) ? 1 : 0;
 453
 454         return 1;
 455 }
 456
 457 static int mtouch_init(struct usbtouch_usb *usbtouch)
 458 {
 459         int ret, i;
 460         struct usb_device *udev = interface_to_usbdev(usbtouch->interface);
 461
 462         ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
 463                               MTOUCHUSB_RESET,
 464                               USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 465                               1, 0, NULL, 0, USB_CTRL_SET_TIMEOUT);
 466         dev_dbg(&usbtouch->interface->dev,
 467                 "%s - usb_control_msg - MTOUCHUSB_RESET - bytes|err: %d\n",
 468                 __func__, ret);
 469         if (ret < 0)
 470                 return ret;
 471         msleep(150);
 472
 473         for (i = 0; i < 3; i++) {
 474                 ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
 475                                       MTOUCHUSB_ASYNC_REPORT,
 476                                       USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 477                                       1, 1, NULL, 0, USB_CTRL_SET_TIMEOUT);
 478                 dev_dbg(&usbtouch->interface->dev,
 479                         "%s - usb_control_msg - MTOUCHUSB_ASYNC_REPORT - bytes|err: %d\n",
 480                         __func__, ret);
 481                 if (ret >= 0)
 482                         break;
 483                 if (ret != -EPIPE)
 484                         return ret;
 485         }
 486
 487         /* Default min/max xy are the raw values, override if using hw-calib */
 488         if (hwcalib_xy) {
 489                 input_set_abs_params(usbtouch->input, ABS_X, 0, 0xffff, 0, 0);
 490                 input_set_abs_params(usbtouch->input, ABS_Y, 0, 0xffff, 0, 0);
 491         }
 492
 493         return 0;
 494 }
 495 #endif
 496
 497
 498 /*****************************************************************************
 499  * ITM Part
 500  */
 501 #ifdef CONFIG_TOUCHSCREEN_USB_ITM
 502 static int itm_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 503 {
 504         int touch;
 505         /*
 506          * ITM devices report invalid x/y data if not touched.
 507          * if the screen was touched before but is not touched any more
 508          * report touch as 0 with the last valid x/y data once. then stop
 509          * reporting data until touched again.
 510          */
 511         dev->press = ((pkt[2] & 0x01) << 7) | (pkt[5] & 0x7F);
 512
 513         touch = ~pkt[7] & 0x20;
 514         if (!touch) {
 515                 if (dev->touch) {
 516                         dev->touch = 0;
 517                         return 1;
 518                 }
 519
 520                 return 0;
 521         }
 522
 523         dev->x = ((pkt[0] & 0x1F) << 7) | (pkt[3] & 0x7F);
 524         dev->y = ((pkt[1] & 0x1F) << 7) | (pkt[4] & 0x7F);
 525         dev->touch = touch;
 526
 527         return 1;
 528 }
 529 #endif
 530
 531
 532 /*****************************************************************************
 533  * eTurboTouch part
 534  */
 535 #ifdef CONFIG_TOUCHSCREEN_USB_ETURBO
 536 #ifndef MULTI_PACKET
 537 #define MULTI_PACKET
 538 #endif
 539 static int eturbo_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 540 {
 541         unsigned int shift;
 542
 543         /* packets should start with sync */
 544         if (!(pkt[0] & 0x80))
 545                 return 0;
 546
 547         shift = (6 - (pkt[0] & 0x03));
 548         dev->x = ((pkt[3] << 7) | pkt[4]) >> shift;
 549         dev->y = ((pkt[1] << 7) | pkt[2]) >> shift;
 550         dev->touch = (pkt[0] & 0x10) ? 1 : 0;
 551
 552         return 1;
 553 }
 554
 555 static int eturbo_get_pkt_len(unsigned char *buf, int len)
 556 {
 557         if (buf[0] & 0x80)
 558                 return 5;
 559         if (buf[0] == 0x01)
 560                 return 3;
 561         return 0;
 562 }
 563 #endif
 564
 565
 566 /*****************************************************************************
 567  * Gunze part
 568  */
 569 #ifdef CONFIG_TOUCHSCREEN_USB_GUNZE
 570 static int gunze_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 571 {
 572         if (!(pkt[0] & 0x80) || ((pkt[1] | pkt[2] | pkt[3]) & 0x80))
 573                 return 0;
 574
 575         dev->x = ((pkt[0] & 0x1F) << 7) | (pkt[2] & 0x7F);
 576         dev->y = ((pkt[1] & 0x1F) << 7) | (pkt[3] & 0x7F);
 577         dev->touch = pkt[0] & 0x20;
 578
 579         return 1;
 580 }
 581 #endif
 582
 583 /*****************************************************************************
 584  * DMC TSC-10/25 Part
 585  *
 586  * Documentation about the controller and it's protocol can be found at
 587  *   http://www.dmccoltd.com/files/controler/tsc10usb_pi_e.pdf
 588  *   http://www.dmccoltd.com/files/controler/tsc25_usb_e.pdf
 589  */
 590 #ifdef CONFIG_TOUCHSCREEN_USB_DMC_TSC10
 591
 592 /* supported data rates. currently using 130 */
 593 #define TSC10_RATE_POINT        0x50
 594 #define TSC10_RATE_30           0x40
 595 #define TSC10_RATE_50           0x41
 596 #define TSC10_RATE_80           0x42
 597 #define TSC10_RATE_100          0x43
 598 #define TSC10_RATE_130          0x44
 599 #define TSC10_RATE_150          0x45
 600
 601 /* commands */
 602 #define TSC10_CMD_RESET         0x55
 603 #define TSC10_CMD_RATE          0x05
 604 #define TSC10_CMD_DATA1         0x01
 605
 606 static int dmc_tsc10_init(struct usbtouch_usb *usbtouch)
 607 {
 608         struct usb_device *dev = interface_to_usbdev(usbtouch->interface);
 609         int ret = -ENOMEM;
 610         unsigned char *buf;
 611
 612         buf = kmalloc(2, GFP_NOIO);
 613         if (!buf)
 614                 goto err_nobuf;
 615         /* reset */
 616         buf[0] = buf[1] = 0xFF;
 617         ret = usb_control_msg(dev, usb_rcvctrlpipe (dev, 0),
 618                               TSC10_CMD_RESET,
 619                               USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 620                               0, 0, buf, 2, USB_CTRL_SET_TIMEOUT);
 621         if (ret < 0)
 622                 goto err_out;
 623         if (buf[0] != 0x06) {
 624                 ret = -ENODEV;
 625                 goto err_out;
 626         }
 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 #endif
1181
1182 #ifdef CONFIG_TOUCHSCREEN_USB_IDEALTEK
1183         [DEVTYPE_IDEALTEK] = {
1184                 .min_xc         = 0x0,
1185                 .max_xc         = 0x0fff,
1186                 .min_yc         = 0x0,
1187                 .max_yc         = 0x0fff,
1188                 .rept_size      = 8,
1189                 .process_pkt    = usbtouch_process_multi,
1190                 .get_pkt_len    = idealtek_get_pkt_len,
1191                 .read_data      = idealtek_read_data,
1192         },
1193 #endif
1194
1195 #ifdef CONFIG_TOUCHSCREEN_USB_GENERAL_TOUCH
1196         [DEVTYPE_GENERAL_TOUCH] = {
1197                 .min_xc         = 0x0,
1198                 .max_xc         = 0x7fff,
1199                 .min_yc         = 0x0,
1200                 .max_yc         = 0x7fff,
1201                 .rept_size      = 7,
1202                 .read_data      = general_touch_read_data,
1203         },
1204 #endif
1205
1206 #ifdef CONFIG_TOUCHSCREEN_USB_GOTOP
1207         [DEVTYPE_GOTOP] = {
1208                 .min_xc         = 0x0,
1209                 .max_xc         = 0x03ff,
1210                 .min_yc         = 0x0,
1211                 .max_yc         = 0x03ff,
1212                 .rept_size      = 4,
1213                 .read_data      = gotop_read_data,
1214         },
1215 #endif
1216
1217 #ifdef CONFIG_TOUCHSCREEN_USB_JASTEC
1218         [DEVTYPE_JASTEC] = {
1219                 .min_xc         = 0x0,
1220                 .max_xc         = 0x0fff,
1221                 .min_yc         = 0x0,
1222                 .max_yc         = 0x0fff,
1223                 .rept_size      = 4,
1224                 .read_data      = jastec_read_data,
1225         },
1226 #endif
1227
1228 #ifdef CONFIG_TOUCHSCREEN_USB_E2I
1229         [DEVTYPE_E2I] = {
1230                 .min_xc         = 0x0,
1231                 .max_xc         = 0x7fff,
1232                 .min_yc         = 0x0,
1233                 .max_yc         = 0x7fff,
1234                 .rept_size      = 6,
1235                 .init           = e2i_init,
1236                 .read_data      = e2i_read_data,
1237         },
1238 #endif
1239
1240 #ifdef CONFIG_TOUCHSCREEN_USB_ZYTRONIC
1241         [DEVTYPE_ZYTRONIC] = {
1242                 .min_xc         = 0x0,
1243                 .max_xc         = 0x03ff,
1244                 .min_yc         = 0x0,
1245                 .max_yc         = 0x03ff,
1246                 .rept_size      = 5,
1247                 .read_data      = zytronic_read_data,
1248                 .irq_always     = true,
1249         },
1250 #endif
1251
1252 #ifdef CONFIG_TOUCHSCREEN_USB_ETT_TC45USB
1253         [DEVTYPE_TC45USB] = {
1254                 .min_xc         = 0x0,
1255                 .max_xc         = 0x0fff,
1256                 .min_yc         = 0x0,
1257                 .max_yc         = 0x0fff,
1258                 .rept_size      = 5,
1259                 .read_data      = tc45usb_read_data,
1260         },
1261 #endif
1262
1263 #ifdef CONFIG_TOUCHSCREEN_USB_NEXIO
1264         [DEVTYPE_NEXIO] = {
1265                 .rept_size      = 1024,
1266                 .irq_always     = true,
1267                 .read_data      = nexio_read_data,
1268                 .alloc          = nexio_alloc,
1269                 .init           = nexio_init,
1270                 .exit           = nexio_exit,
1271         },
1272 #endif
1273 #ifdef CONFIG_TOUCHSCREEN_USB_EASYTOUCH
1274         [DEVTYPE_ETOUCH] = {
1275                 .min_xc         = 0x0,
1276                 .max_xc         = 0x07ff,
1277                 .min_yc         = 0x0,
1278                 .max_yc         = 0x07ff,
1279                 .rept_size      = 16,
1280                 .process_pkt    = usbtouch_process_multi,
1281                 .get_pkt_len    = etouch_get_pkt_len,
1282                 .read_data      = etouch_read_data,
1283         },
1284 #endif
1285 };
1286
1287
1288 /*****************************************************************************
1289  * Generic Part
1290  */
1291 static void usbtouch_process_pkt(struct usbtouch_usb *usbtouch,
1292                                  unsigned char *pkt, int len)
1293 {
1294         struct usbtouch_device_info *type = usbtouch->type;
1295
1296         if (!type->read_data(usbtouch, pkt))
1297                         return;
1298
1299         input_report_key(usbtouch->input, BTN_TOUCH, usbtouch->touch);
1300
1301         if (swap_xy) {
1302                 input_report_abs(usbtouch->input, ABS_X, usbtouch->y);
1303                 input_report_abs(usbtouch->input, ABS_Y, usbtouch->x);
1304         } else {
1305                 input_report_abs(usbtouch->input, ABS_X, usbtouch->x);
1306                 input_report_abs(usbtouch->input, ABS_Y, usbtouch->y);
1307         }
1308         if (type->max_press)
1309                 input_report_abs(usbtouch->input, ABS_PRESSURE, usbtouch->press);
1310         input_sync(usbtouch->input);
1311 }
1312
1313
1314 #ifdef MULTI_PACKET
1315 static void usbtouch_process_multi(struct usbtouch_usb *usbtouch,
1316                                    unsigned char *pkt, int len)
1317 {
1318         unsigned char *buffer;
1319         int pkt_len, pos, buf_len, tmp;
1320
1321         /* process buffer */
1322         if (unlikely(usbtouch->buf_len)) {
1323                 /* try to get size */
1324                 pkt_len = usbtouch->type->get_pkt_len(
1325                                 usbtouch->buffer, usbtouch->buf_len);
1326
1327                 /* drop? */
1328                 if (unlikely(!pkt_len))
1329                         goto out_flush_buf;
1330
1331                 /* need to append -pkt_len bytes before able to get size */
1332                 if (unlikely(pkt_len < 0)) {
1333                         int append = -pkt_len;
1334                         if (unlikely(append > len))
1335                                append = len;
1336                         if (usbtouch->buf_len + append >= usbtouch->type->rept_size)
1337                                 goto out_flush_buf;
1338                         memcpy(usbtouch->buffer + usbtouch->buf_len, pkt, append);
1339                         usbtouch->buf_len += append;
1340
1341                         pkt_len = usbtouch->type->get_pkt_len(
1342                                         usbtouch->buffer, usbtouch->buf_len);
1343                         if (pkt_len < 0)
1344                                 return;
1345                 }
1346
1347                 /* append */
1348                 tmp = pkt_len - usbtouch->buf_len;
1349                 if (usbtouch->buf_len + tmp >= usbtouch->type->rept_size)
1350                         goto out_flush_buf;
1351                 memcpy(usbtouch->buffer + usbtouch->buf_len, pkt, tmp);
1352                 usbtouch_process_pkt(usbtouch, usbtouch->buffer, pkt_len);
1353
1354                 buffer = pkt + tmp;
1355                 buf_len = len - tmp;
1356         } else {
1357                 buffer = pkt;
1358                 buf_len = len;
1359         }
1360
1361         /* loop over the received packet, process */
1362         pos = 0;
1363         while (pos < buf_len) {
1364                 /* get packet len */
1365                 pkt_len = usbtouch->type->get_pkt_len(buffer + pos,
1366                                                         buf_len - pos);
1367
1368                 /* unknown packet: skip one byte */
1369                 if (unlikely(!pkt_len)) {
1370                         pos++;
1371                         continue;
1372                 }
1373
1374                 /* full packet: process */
1375                 if (likely((pkt_len > 0) && (pkt_len <= buf_len - pos))) {
1376                         usbtouch_process_pkt(usbtouch, buffer + pos, pkt_len);
1377                 } else {
1378                         /* incomplete packet: save in buffer */
1379                         memcpy(usbtouch->buffer, buffer + pos, buf_len - pos);
1380                         usbtouch->buf_len = buf_len - pos;
1381                         return;
1382                 }
1383                 pos += pkt_len;
1384         }
1385
1386 out_flush_buf:
1387         usbtouch->buf_len = 0;
1388         return;
1389 }
1390 #endif
1391
1392
1393 static void usbtouch_irq(struct urb *urb)
1394 {
1395         struct usbtouch_usb *usbtouch = urb->context;
1396         struct device *dev = &usbtouch->interface->dev;
1397         int retval;
1398
1399         switch (urb->status) {
1400         case 0:
1401                 /* success */
1402                 break;
1403         case -ETIME:
1404                 /* this urb is timing out */
1405                 dev_dbg(dev,
1406                         "%s - urb timed out - was the device unplugged?\n",
1407                         __func__);
1408                 return;
1409         case -ECONNRESET:
1410         case -ENOENT:
1411         case -ESHUTDOWN:
1412         case -EPIPE:
1413                 /* this urb is terminated, clean up */
1414                 dev_dbg(dev, "%s - urb shutting down with status: %d\n",
1415                         __func__, urb->status);
1416                 return;
1417         default:
1418                 dev_dbg(dev, "%s - nonzero urb status received: %d\n",
1419                         __func__, urb->status);
1420                 goto exit;
1421         }
1422
1423         usbtouch->type->process_pkt(usbtouch, usbtouch->data, urb->actual_length);
1424
1425 exit:
1426         usb_mark_last_busy(interface_to_usbdev(usbtouch->interface));
1427         retval = usb_submit_urb(urb, GFP_ATOMIC);
1428         if (retval)
1429                 dev_err(dev, "%s - usb_submit_urb failed with result: %d\n",
1430                         __func__, retval);
1431 }
1432
1433 static int usbtouch_open(struct input_dev *input)
1434 {
1435         struct usbtouch_usb *usbtouch = input_get_drvdata(input);
1436         int r;
1437
1438         usbtouch->irq->dev = interface_to_usbdev(usbtouch->interface);
1439
1440         r = usb_autopm_get_interface(usbtouch->interface) ? -EIO : 0;
1441         if (r < 0)
1442                 goto out;
1443
1444         if (!usbtouch->type->irq_always) {
1445                 if (usb_submit_urb(usbtouch->irq, GFP_KERNEL)) {
1446                         r = -EIO;
1447                         goto out_put;
1448                 }
1449         }
1450
1451         usbtouch->interface->needs_remote_wakeup = 1;
1452 out_put:
1453         usb_autopm_put_interface(usbtouch->interface);
1454 out:
1455         return r;
1456 }
1457
1458 static void usbtouch_close(struct input_dev *input)
1459 {
1460         struct usbtouch_usb *usbtouch = input_get_drvdata(input);
1461         int r;
1462
1463         if (!usbtouch->type->irq_always)
1464                 usb_kill_urb(usbtouch->irq);
1465         r = usb_autopm_get_interface(usbtouch->interface);
1466         usbtouch->interface->needs_remote_wakeup = 0;
1467         if (!r)
1468                 usb_autopm_put_interface(usbtouch->interface);
1469 }
1470
1471 static int usbtouch_suspend
1472 (struct usb_interface *intf, pm_message_t message)
1473 {
1474         struct usbtouch_usb *usbtouch = usb_get_intfdata(intf);
1475
1476         usb_kill_urb(usbtouch->irq);
1477
1478         return 0;
1479 }
1480
1481 static int usbtouch_resume(struct usb_interface *intf)
1482 {
1483         struct usbtouch_usb *usbtouch = usb_get_intfdata(intf);
1484         struct input_dev *input = usbtouch->input;
1485         int result = 0;
1486
1487         mutex_lock(&input->mutex);
1488         if (input->users || usbtouch->type->irq_always)
1489                 result = usb_submit_urb(usbtouch->irq, GFP_NOIO);
1490         mutex_unlock(&input->mutex);
1491
1492         return result;
1493 }
1494
1495 static int usbtouch_reset_resume(struct usb_interface *intf)
1496 {
1497         struct usbtouch_usb *usbtouch = usb_get_intfdata(intf);
1498         struct input_dev *input = usbtouch->input;
1499         int err = 0;
1500
1501         /* reinit the device */
1502         if (usbtouch->type->init) {
1503                 err = usbtouch->type->init(usbtouch);
1504                 if (err) {
1505                         dev_dbg(&intf->dev,
1506                                 "%s - type->init() failed, err: %d\n",
1507                                 __func__, err);
1508                         return err;
1509                 }
1510         }
1511
1512         /* restart IO if needed */
1513         mutex_lock(&input->mutex);
1514         if (input->users)
1515                 err = usb_submit_urb(usbtouch->irq, GFP_NOIO);
1516         mutex_unlock(&input->mutex);
1517
1518         return err;
1519 }
1520
1521 static void usbtouch_free_buffers(struct usb_device *udev,
1522                                   struct usbtouch_usb *usbtouch)
1523 {
1524         usb_free_coherent(udev, usbtouch->type->rept_size,
1525                           usbtouch->data, usbtouch->data_dma);
1526         kfree(usbtouch->buffer);
1527 }
1528
1529 static struct usb_endpoint_descriptor *
1530 usbtouch_get_input_endpoint(struct usb_host_interface *interface)
1531 {
1532         int i;
1533
1534         for (i = 0; i < interface->desc.bNumEndpoints; i++)
1535                 if (usb_endpoint_dir_in(&interface->endpoint[i].desc))
1536                         return &interface->endpoint[i].desc;
1537
1538         return NULL;
1539 }
1540
1541 static int usbtouch_probe(struct usb_interface *intf,
1542                           const struct usb_device_id *id)
1543 {
1544         struct usbtouch_usb *usbtouch;
1545         struct input_dev *input_dev;
1546         struct usb_endpoint_descriptor *endpoint;
1547         struct usb_device *udev = interface_to_usbdev(intf);
1548         struct usbtouch_device_info *type;
1549         int err = -ENOMEM;
1550
1551         /* some devices are ignored */
1552         if (id->driver_info == DEVTYPE_IGNORE)
1553                 return -ENODEV;
1554
1555         endpoint = usbtouch_get_input_endpoint(intf->cur_altsetting);
1556         if (!endpoint)
1557                 return -ENXIO;
1558
1559         usbtouch = kzalloc(sizeof(struct usbtouch_usb), GFP_KERNEL);
1560         input_dev = input_allocate_device();
1561         if (!usbtouch || !input_dev)
1562                 goto out_free;
1563
1564         type = &usbtouch_dev_info[id->driver_info];
1565         usbtouch->type = type;
1566         if (!type->process_pkt)
1567                 type->process_pkt = usbtouch_process_pkt;
1568
1569         usbtouch->data = usb_alloc_coherent(udev, type->rept_size,
1570                                             GFP_KERNEL, &usbtouch->data_dma);
1571         if (!usbtouch->data)
1572                 goto out_free;
1573
1574         if (type->get_pkt_len) {
1575                 usbtouch->buffer = kmalloc(type->rept_size, GFP_KERNEL);
1576                 if (!usbtouch->buffer)
1577                         goto out_free_buffers;
1578         }
1579
1580         usbtouch->irq = usb_alloc_urb(0, GFP_KERNEL);
1581         if (!usbtouch->irq) {
1582                 dev_dbg(&intf->dev,
1583                         "%s - usb_alloc_urb failed: usbtouch->irq\n", __func__);
1584                 goto out_free_buffers;
1585         }
1586
1587         usbtouch->interface = intf;
1588         usbtouch->input = input_dev;
1589
1590         if (udev->manufacturer)
1591                 strlcpy(usbtouch->name, udev->manufacturer, sizeof(usbtouch->name));
1592
1593         if (udev->product) {
1594                 if (udev->manufacturer)
1595                         strlcat(usbtouch->name, " ", sizeof(usbtouch->name));
1596                 strlcat(usbtouch->name, udev->product, sizeof(usbtouch->name));
1597         }
1598
1599         if (!strlen(usbtouch->name))
1600                 snprintf(usbtouch->name, sizeof(usbtouch->name),
1601                         "USB Touchscreen %04x:%04x",
1602                          le16_to_cpu(udev->descriptor.idVendor),
1603                          le16_to_cpu(udev->descriptor.idProduct));
1604
1605         usb_make_path(udev, usbtouch->phys, sizeof(usbtouch->phys));
1606         strlcat(usbtouch->phys, "/input0", sizeof(usbtouch->phys));
1607
1608         input_dev->name = usbtouch->name;
1609         input_dev->phys = usbtouch->phys;
1610         usb_to_input_id(udev, &input_dev->id);
1611         input_dev->dev.parent = &intf->dev;
1612
1613         input_set_drvdata(input_dev, usbtouch);
1614
1615         input_dev->open = usbtouch_open;
1616         input_dev->close = usbtouch_close;
1617
1618         input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
1619         input_dev->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH);
1620         input_set_abs_params(input_dev, ABS_X, type->min_xc, type->max_xc, 0, 0);
1621         input_set_abs_params(input_dev, ABS_Y, type->min_yc, type->max_yc, 0, 0);
1622         if (type->max_press)
1623                 input_set_abs_params(input_dev, ABS_PRESSURE, type->min_press,
1624                                      type->max_press, 0, 0);
1625
1626         if (usb_endpoint_type(endpoint) == USB_ENDPOINT_XFER_INT)
1627                 usb_fill_int_urb(usbtouch->irq, udev,
1628                          usb_rcvintpipe(udev, endpoint->bEndpointAddress),
1629                          usbtouch->data, type->rept_size,
1630                          usbtouch_irq, usbtouch, endpoint->bInterval);
1631         else
1632                 usb_fill_bulk_urb(usbtouch->irq, udev,
1633                          usb_rcvbulkpipe(udev, endpoint->bEndpointAddress),
1634                          usbtouch->data, type->rept_size,
1635                          usbtouch_irq, usbtouch);
1636
1637         usbtouch->irq->dev = udev;
1638         usbtouch->irq->transfer_dma = usbtouch->data_dma;
1639         usbtouch->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1640
1641         /* device specific allocations */
1642         if (type->alloc) {
1643                 err = type->alloc(usbtouch);
1644                 if (err) {
1645                         dev_dbg(&intf->dev,
1646                                 "%s - type->alloc() failed, err: %d\n",
1647                                 __func__, err);
1648                         goto out_free_urb;
1649                 }
1650         }
1651
1652         /* device specific initialisation*/
1653         if (type->init) {
1654                 err = type->init(usbtouch);
1655                 if (err) {
1656                         dev_dbg(&intf->dev,
1657                                 "%s - type->init() failed, err: %d\n",
1658                                 __func__, err);
1659                         goto out_do_exit;
1660                 }
1661         }
1662
1663         err = input_register_device(usbtouch->input);
1664         if (err) {
1665                 dev_dbg(&intf->dev,
1666                         "%s - input_register_device failed, err: %d\n",
1667                         __func__, err);
1668                 goto out_do_exit;
1669         }
1670
1671         usb_set_intfdata(intf, usbtouch);
1672
1673         if (usbtouch->type->irq_always) {
1674                 /* this can't fail */
1675                 usb_autopm_get_interface(intf);
1676                 err = usb_submit_urb(usbtouch->irq, GFP_KERNEL);
1677                 if (err) {
1678                         usb_autopm_put_interface(intf);
1679                         dev_err(&intf->dev,
1680                                 "%s - usb_submit_urb failed with result: %d\n",
1681                                 __func__, err);
1682                         goto out_unregister_input;
1683                 }
1684         }
1685
1686         return 0;
1687
1688 out_unregister_input:
1689         input_unregister_device(input_dev);
1690         input_dev = NULL;
1691 out_do_exit:
1692         if (type->exit)
1693                 type->exit(usbtouch);
1694 out_free_urb:
1695         usb_free_urb(usbtouch->irq);
1696 out_free_buffers:
1697         usbtouch_free_buffers(udev, usbtouch);
1698 out_free:
1699         input_free_device(input_dev);
1700         kfree(usbtouch);
1701         return err;
1702 }
1703
1704 static void usbtouch_disconnect(struct usb_interface *intf)
1705 {
1706         struct usbtouch_usb *usbtouch = usb_get_intfdata(intf);
1707
1708         if (!usbtouch)
1709                 return;
1710
1711         dev_dbg(&intf->dev,
1712                 "%s - usbtouch is initialized, cleaning up\n", __func__);
1713
1714         usb_set_intfdata(intf, NULL);
1715         /* this will stop IO via close */
1716         input_unregister_device(usbtouch->input);
1717         usb_free_urb(usbtouch->irq);
1718         if (usbtouch->type->exit)
1719                 usbtouch->type->exit(usbtouch);
1720         usbtouch_free_buffers(interface_to_usbdev(intf), usbtouch);
1721         kfree(usbtouch);
1722 }
1723
1724 MODULE_DEVICE_TABLE(usb, usbtouch_devices);
1725
1726 static struct usb_driver usbtouch_driver = {
1727         .name           = "usbtouchscreen",
1728         .probe          = usbtouch_probe,
1729         .disconnect     = usbtouch_disconnect,
1730         .suspend        = usbtouch_suspend,
1731         .resume         = usbtouch_resume,
1732         .reset_resume   = usbtouch_reset_resume,
1733         .id_table       = usbtouch_devices,
1734         .supports_autosuspend = 1,
1735 };
1736
1737 module_usb_driver(usbtouch_driver);
1738
1739 MODULE_AUTHOR(DRIVER_AUTHOR);
1740 MODULE_DESCRIPTION(DRIVER_DESC);
1741 MODULE_LICENSE("GPL");
1742
1743 MODULE_ALIAS("touchkitusb");
1744 MODULE_ALIAS("itmtouch");
1745 MODULE_ALIAS("mtouchusb");