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  *
  20  * Copyright (C) 2004-2007 by Daniel Ritz <daniel.ritz@gmx.ch>
  21  * Copyright (C) by Todd E. Johnson (mtouchusb.c)
  22  *
  23  * This program is free software; you can redistribute it and/or
  24  * modify it under the terms of the GNU General Public License as
  25  * published by the Free Software Foundation; either version 2 of the
  26  * License, or (at your option) any later version.
  27  *
  28  * This program is distributed in the hope that it will be useful, but
  29  * WITHOUT ANY WARRANTY; without even the implied warranty of
  30  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  31  * General Public License for more details.
  32  *
  33  * You should have received a copy of the GNU General Public License
  34  * along with this program; if not, write to the Free Software
  35  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  36  *
  37  * Driver is based on touchkitusb.c
  38  * - ITM parts are from itmtouch.c
  39  * - 3M parts are from mtouchusb.c
  40  * - PanJit parts are from an unmerged driver by Lanslott Gish
  41  * - DMC TSC 10/25 are from Holger Schurig, with ideas from an unmerged
  42  *   driver from Marius Vollmer
  43  *
  44  *****************************************************************************/
  45
  46 //#define DEBUG
  47
  48 #include <linux/kernel.h>
  49 #include <linux/slab.h>
  50 #include <linux/input.h>
  51 #include <linux/module.h>
  52 #include <linux/init.h>
  53 #include <linux/usb.h>
  54 #include <linux/usb/input.h>
  55 #include <linux/hid.h>
  56
  57
  58 #define DRIVER_VERSION          "v0.6"
  59 #define DRIVER_AUTHOR           "Daniel Ritz <daniel.ritz@gmx.ch>"
  60 #define DRIVER_DESC             "USB Touchscreen Driver"
  61
  62 static int swap_xy;
  63 module_param(swap_xy, bool, 0644);
  64 MODULE_PARM_DESC(swap_xy, "If set X and Y axes are swapped.");
  65
  66 static int hwcalib_xy;
  67 module_param(hwcalib_xy, bool, 0644);
  68 MODULE_PARM_DESC(hwcalib_xy, "If set hw-calibrated X/Y are used if available");
  69
  70 /* device specifc data/functions */
  71 struct usbtouch_usb;
  72 struct usbtouch_device_info {
  73         int min_xc, max_xc;
  74         int min_yc, max_yc;
  75         int min_press, max_press;
  76         int rept_size;
  77
  78         /*
  79          * Always service the USB devices irq not just when the input device is
  80          * open. This is useful when devices have a watchdog which prevents us
  81          * from periodically polling the device. Leave this unset unless your
  82          * touchscreen device requires it, as it does consume more of the USB
  83          * bandwidth.
  84          */
  85         bool irq_always;
  86
  87         void (*process_pkt) (struct usbtouch_usb *usbtouch, unsigned char *pkt, int len);
  88
  89         /*
  90          * used to get the packet len. possible return values:
  91          * > 0: packet len
  92          * = 0: skip one byte
  93          * < 0: -return value more bytes needed
  94          */
  95         int  (*get_pkt_len) (unsigned char *pkt, int len);
  96
  97         int  (*read_data)   (struct usbtouch_usb *usbtouch, unsigned char *pkt);
  98         int  (*alloc)       (struct usbtouch_usb *usbtouch);
  99         int  (*init)        (struct usbtouch_usb *usbtouch);
 100         void (*exit)        (struct usbtouch_usb *usbtouch);
 101 };
 102
 103 /* a usbtouch device */
 104 struct usbtouch_usb {
 105         unsigned char *data;
 106         dma_addr_t data_dma;
 107         unsigned char *buffer;
 108         int buf_len;
 109         struct urb *irq;
 110         struct usb_interface *interface;
 111         struct input_dev *input;
 112         struct usbtouch_device_info *type;
 113         char name[128];
 114         char phys[64];
 115         void *priv;
 116
 117         int x, y;
 118         int touch, press;
 119 };
 120
 121
 122 /* device types */
 123 enum {
 124         DEVTYPE_IGNORE = -1,
 125         DEVTYPE_EGALAX,
 126         DEVTYPE_PANJIT,
 127         DEVTYPE_3M,
 128         DEVTYPE_ITM,
 129         DEVTYPE_ETURBO,
 130         DEVTYPE_GUNZE,
 131         DEVTYPE_DMC_TSC10,
 132         DEVTYPE_IRTOUCH,
 133         DEVTYPE_IDEALTEK,
 134         DEVTYPE_GENERAL_TOUCH,
 135         DEVTYPE_GOTOP,
 136         DEVTYPE_JASTEC,
 137         DEVTYPE_E2I,
 138         DEVTYPE_ZYTRONIC,
 139         DEVTYPE_TC45USB,
 140         DEVTYPE_NEXIO,
 141 };
 142
 143 #define USB_DEVICE_HID_CLASS(vend, prod) \
 144         .match_flags = USB_DEVICE_ID_MATCH_INT_CLASS \
 145                 | USB_DEVICE_ID_MATCH_INT_PROTOCOL \
 146                 | USB_DEVICE_ID_MATCH_DEVICE, \
 147         .idVendor = (vend), \
 148         .idProduct = (prod), \
 149         .bInterfaceClass = USB_INTERFACE_CLASS_HID, \
 150         .bInterfaceProtocol = USB_INTERFACE_PROTOCOL_MOUSE
 151
 152 static const struct usb_device_id usbtouch_devices[] = {
 153 #ifdef CONFIG_TOUCHSCREEN_USB_EGALAX
 154         /* ignore the HID capable devices, handled by usbhid */
 155         {USB_DEVICE_HID_CLASS(0x0eef, 0x0001), .driver_info = DEVTYPE_IGNORE},
 156         {USB_DEVICE_HID_CLASS(0x0eef, 0x0002), .driver_info = DEVTYPE_IGNORE},
 157
 158         /* normal device IDs */
 159         {USB_DEVICE(0x3823, 0x0001), .driver_info = DEVTYPE_EGALAX},
 160         {USB_DEVICE(0x3823, 0x0002), .driver_info = DEVTYPE_EGALAX},
 161         {USB_DEVICE(0x0123, 0x0001), .driver_info = DEVTYPE_EGALAX},
 162         {USB_DEVICE(0x0eef, 0x0001), .driver_info = DEVTYPE_EGALAX},
 163         {USB_DEVICE(0x0eef, 0x0002), .driver_info = DEVTYPE_EGALAX},
 164         {USB_DEVICE(0x1234, 0x0001), .driver_info = DEVTYPE_EGALAX},
 165         {USB_DEVICE(0x1234, 0x0002), .driver_info = DEVTYPE_EGALAX},
 166 #endif
 167
 168 #ifdef CONFIG_TOUCHSCREEN_USB_PANJIT
 169         {USB_DEVICE(0x134c, 0x0001), .driver_info = DEVTYPE_PANJIT},
 170         {USB_DEVICE(0x134c, 0x0002), .driver_info = DEVTYPE_PANJIT},
 171         {USB_DEVICE(0x134c, 0x0003), .driver_info = DEVTYPE_PANJIT},
 172         {USB_DEVICE(0x134c, 0x0004), .driver_info = DEVTYPE_PANJIT},
 173 #endif
 174
 175 #ifdef CONFIG_TOUCHSCREEN_USB_3M
 176         {USB_DEVICE(0x0596, 0x0001), .driver_info = DEVTYPE_3M},
 177 #endif
 178
 179 #ifdef CONFIG_TOUCHSCREEN_USB_ITM
 180         {USB_DEVICE(0x0403, 0xf9e9), .driver_info = DEVTYPE_ITM},
 181         {USB_DEVICE(0x16e3, 0xf9e9), .driver_info = DEVTYPE_ITM},
 182 #endif
 183
 184 #ifdef CONFIG_TOUCHSCREEN_USB_ETURBO
 185         {USB_DEVICE(0x1234, 0x5678), .driver_info = DEVTYPE_ETURBO},
 186 #endif
 187
 188 #ifdef CONFIG_TOUCHSCREEN_USB_GUNZE
 189         {USB_DEVICE(0x0637, 0x0001), .driver_info = DEVTYPE_GUNZE},
 190 #endif
 191
 192 #ifdef CONFIG_TOUCHSCREEN_USB_DMC_TSC10
 193         {USB_DEVICE(0x0afa, 0x03e8), .driver_info = DEVTYPE_DMC_TSC10},
 194 #endif
 195
 196 #ifdef CONFIG_TOUCHSCREEN_USB_IRTOUCH
 197         {USB_DEVICE(0x595a, 0x0001), .driver_info = DEVTYPE_IRTOUCH},
 198         {USB_DEVICE(0x6615, 0x0001), .driver_info = DEVTYPE_IRTOUCH},
 199 #endif
 200
 201 #ifdef CONFIG_TOUCHSCREEN_USB_IDEALTEK
 202         {USB_DEVICE(0x1391, 0x1000), .driver_info = DEVTYPE_IDEALTEK},
 203 #endif
 204
 205 #ifdef CONFIG_TOUCHSCREEN_USB_GENERAL_TOUCH
 206         {USB_DEVICE(0x0dfc, 0x0001), .driver_info = DEVTYPE_GENERAL_TOUCH},
 207 #endif
 208
 209 #ifdef CONFIG_TOUCHSCREEN_USB_GOTOP
 210         {USB_DEVICE(0x08f2, 0x007f), .driver_info = DEVTYPE_GOTOP},
 211         {USB_DEVICE(0x08f2, 0x00ce), .driver_info = DEVTYPE_GOTOP},
 212         {USB_DEVICE(0x08f2, 0x00f4), .driver_info = DEVTYPE_GOTOP},
 213 #endif
 214
 215 #ifdef CONFIG_TOUCHSCREEN_USB_JASTEC
 216         {USB_DEVICE(0x0f92, 0x0001), .driver_info = DEVTYPE_JASTEC},
 217 #endif
 218
 219 #ifdef CONFIG_TOUCHSCREEN_USB_E2I
 220         {USB_DEVICE(0x1ac7, 0x0001), .driver_info = DEVTYPE_E2I},
 221 #endif
 222
 223 #ifdef CONFIG_TOUCHSCREEN_USB_ZYTRONIC
 224         {USB_DEVICE(0x14c8, 0x0003), .driver_info = DEVTYPE_ZYTRONIC},
 225 #endif
 226
 227 #ifdef CONFIG_TOUCHSCREEN_USB_ETT_TC45USB
 228         /* TC5UH */
 229         {USB_DEVICE(0x0664, 0x0309), .driver_info = DEVTYPE_TC45USB},
 230         /* TC4UM */
 231         {USB_DEVICE(0x0664, 0x0306), .driver_info = DEVTYPE_TC45USB},
 232 #endif
 233
 234 #ifdef CONFIG_TOUCHSCREEN_USB_NEXIO
 235         /* data interface only */
 236         {USB_DEVICE_AND_INTERFACE_INFO(0x10f0, 0x2002, 0x0a, 0x00, 0x00),
 237                 .driver_info = DEVTYPE_NEXIO},
 238         {USB_DEVICE_AND_INTERFACE_INFO(0x1870, 0x0001, 0x0a, 0x00, 0x00),
 239                 .driver_info = DEVTYPE_NEXIO},
 240 #endif
 241
 242         {}
 243 };
 244
 245
 246 /*****************************************************************************
 247  * e2i Part
 248  */
 249
 250 #ifdef CONFIG_TOUCHSCREEN_USB_E2I
 251 static int e2i_init(struct usbtouch_usb *usbtouch)
 252 {
 253         int ret;
 254         struct usb_device *udev = interface_to_usbdev(usbtouch->interface);
 255
 256         ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
 257                               0x01, 0x02, 0x0000, 0x0081,
 258                               NULL, 0, USB_CTRL_SET_TIMEOUT);
 259
 260         dbg("%s - usb_control_msg - E2I_RESET - bytes|err: %d",
 261             __func__, ret);
 262         return ret;
 263 }
 264
 265 static int e2i_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 266 {
 267         int tmp = (pkt[0] << 8) | pkt[1];
 268         dev->x  = (pkt[2] << 8) | pkt[3];
 269         dev->y  = (pkt[4] << 8) | pkt[5];
 270
 271         tmp = tmp - 0xA000;
 272         dev->touch = (tmp > 0);
 273         dev->press = (tmp > 0 ? tmp : 0);
 274
 275         return 1;
 276 }
 277 #endif
 278
 279
 280 /*****************************************************************************
 281  * eGalax part
 282  */
 283
 284 #ifdef CONFIG_TOUCHSCREEN_USB_EGALAX
 285
 286 #ifndef MULTI_PACKET
 287 #define MULTI_PACKET
 288 #endif
 289
 290 #define EGALAX_PKT_TYPE_MASK            0xFE
 291 #define EGALAX_PKT_TYPE_REPT            0x80
 292 #define EGALAX_PKT_TYPE_DIAG            0x0A
 293
 294 static int egalax_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 295 {
 296         if ((pkt[0] & EGALAX_PKT_TYPE_MASK) != EGALAX_PKT_TYPE_REPT)
 297                 return 0;
 298
 299         dev->x = ((pkt[3] & 0x0F) << 7) | (pkt[4] & 0x7F);
 300         dev->y = ((pkt[1] & 0x0F) << 7) | (pkt[2] & 0x7F);
 301         dev->touch = pkt[0] & 0x01;
 302
 303         return 1;
 304 }
 305
 306 static int egalax_get_pkt_len(unsigned char *buf, int len)
 307 {
 308         switch (buf[0] & EGALAX_PKT_TYPE_MASK) {
 309         case EGALAX_PKT_TYPE_REPT:
 310                 return 5;
 311
 312         case EGALAX_PKT_TYPE_DIAG:
 313                 if (len < 2)
 314                         return -1;
 315
 316                 return buf[1] + 2;
 317         }
 318
 319         return 0;
 320 }
 321 #endif
 322
 323
 324 /*****************************************************************************
 325  * PanJit Part
 326  */
 327 #ifdef CONFIG_TOUCHSCREEN_USB_PANJIT
 328 static int panjit_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 329 {
 330         dev->x = ((pkt[2] & 0x0F) << 8) | pkt[1];
 331         dev->y = ((pkt[4] & 0x0F) << 8) | pkt[3];
 332         dev->touch = pkt[0] & 0x01;
 333
 334         return 1;
 335 }
 336 #endif
 337
 338
 339 /*****************************************************************************
 340  * 3M/Microtouch Part
 341  */
 342 #ifdef CONFIG_TOUCHSCREEN_USB_3M
 343
 344 #define MTOUCHUSB_ASYNC_REPORT          1
 345 #define MTOUCHUSB_RESET                 7
 346 #define MTOUCHUSB_REQ_CTRLLR_ID         10
 347
 348 static int mtouch_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 349 {
 350         if (hwcalib_xy) {
 351                 dev->x = (pkt[4] << 8) | pkt[3];
 352                 dev->y = 0xffff - ((pkt[6] << 8) | pkt[5]);
 353         } else {
 354                 dev->x = (pkt[8] << 8) | pkt[7];
 355                 dev->y = (pkt[10] << 8) | pkt[9];
 356         }
 357         dev->touch = (pkt[2] & 0x40) ? 1 : 0;
 358
 359         return 1;
 360 }
 361
 362 static int mtouch_init(struct usbtouch_usb *usbtouch)
 363 {
 364         int ret, i;
 365         struct usb_device *udev = interface_to_usbdev(usbtouch->interface);
 366
 367         ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
 368                               MTOUCHUSB_RESET,
 369                               USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 370                               1, 0, NULL, 0, USB_CTRL_SET_TIMEOUT);
 371         dbg("%s - usb_control_msg - MTOUCHUSB_RESET - bytes|err: %d",
 372             __func__, ret);
 373         if (ret < 0)
 374                 return ret;
 375         msleep(150);
 376
 377         for (i = 0; i < 3; i++) {
 378                 ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
 379                                       MTOUCHUSB_ASYNC_REPORT,
 380                                       USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 381                                       1, 1, NULL, 0, USB_CTRL_SET_TIMEOUT);
 382                 dbg("%s - usb_control_msg - MTOUCHUSB_ASYNC_REPORT - bytes|err: %d",
 383                     __func__, ret);
 384                 if (ret >= 0)
 385                         break;
 386                 if (ret != -EPIPE)
 387                         return ret;
 388         }
 389
 390         /* Default min/max xy are the raw values, override if using hw-calib */
 391         if (hwcalib_xy) {
 392                 input_set_abs_params(usbtouch->input, ABS_X, 0, 0xffff, 0, 0);
 393                 input_set_abs_params(usbtouch->input, ABS_Y, 0, 0xffff, 0, 0);
 394         }
 395
 396         return 0;
 397 }
 398 #endif
 399
 400
 401 /*****************************************************************************
 402  * ITM Part
 403  */
 404 #ifdef CONFIG_TOUCHSCREEN_USB_ITM
 405 static int itm_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 406 {
 407         int touch;
 408         /*
 409          * ITM devices report invalid x/y data if not touched.
 410          * if the screen was touched before but is not touched any more
 411          * report touch as 0 with the last valid x/y data once. then stop
 412          * reporting data until touched again.
 413          */
 414         dev->press = ((pkt[2] & 0x01) << 7) | (pkt[5] & 0x7F);
 415
 416         touch = ~pkt[7] & 0x20;
 417         if (!touch) {
 418                 if (dev->touch) {
 419                         dev->touch = 0;
 420                         return 1;
 421                 }
 422
 423                 return 0;
 424         }
 425
 426         dev->x = ((pkt[0] & 0x1F) << 7) | (pkt[3] & 0x7F);
 427         dev->y = ((pkt[1] & 0x1F) << 7) | (pkt[4] & 0x7F);
 428         dev->touch = touch;
 429
 430         return 1;
 431 }
 432 #endif
 433
 434
 435 /*****************************************************************************
 436  * eTurboTouch part
 437  */
 438 #ifdef CONFIG_TOUCHSCREEN_USB_ETURBO
 439 #ifndef MULTI_PACKET
 440 #define MULTI_PACKET
 441 #endif
 442 static int eturbo_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 443 {
 444         unsigned int shift;
 445
 446         /* packets should start with sync */
 447         if (!(pkt[0] & 0x80))
 448                 return 0;
 449
 450         shift = (6 - (pkt[0] & 0x03));
 451         dev->x = ((pkt[3] << 7) | pkt[4]) >> shift;
 452         dev->y = ((pkt[1] << 7) | pkt[2]) >> shift;
 453         dev->touch = (pkt[0] & 0x10) ? 1 : 0;
 454
 455         return 1;
 456 }
 457
 458 static int eturbo_get_pkt_len(unsigned char *buf, int len)
 459 {
 460         if (buf[0] & 0x80)
 461                 return 5;
 462         if (buf[0] == 0x01)
 463                 return 3;
 464         return 0;
 465 }
 466 #endif
 467
 468
 469 /*****************************************************************************
 470  * Gunze part
 471  */
 472 #ifdef CONFIG_TOUCHSCREEN_USB_GUNZE
 473 static int gunze_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 474 {
 475         if (!(pkt[0] & 0x80) || ((pkt[1] | pkt[2] | pkt[3]) & 0x80))
 476                 return 0;
 477
 478         dev->x = ((pkt[0] & 0x1F) << 7) | (pkt[2] & 0x7F);
 479         dev->y = ((pkt[1] & 0x1F) << 7) | (pkt[3] & 0x7F);
 480         dev->touch = pkt[0] & 0x20;
 481
 482         return 1;
 483 }
 484 #endif
 485
 486 /*****************************************************************************
 487  * DMC TSC-10/25 Part
 488  *
 489  * Documentation about the controller and it's protocol can be found at
 490  *   http://www.dmccoltd.com/files/controler/tsc10usb_pi_e.pdf
 491  *   http://www.dmccoltd.com/files/controler/tsc25_usb_e.pdf
 492  */
 493 #ifdef CONFIG_TOUCHSCREEN_USB_DMC_TSC10
 494
 495 /* supported data rates. currently using 130 */
 496 #define TSC10_RATE_POINT        0x50
 497 #define TSC10_RATE_30           0x40
 498 #define TSC10_RATE_50           0x41
 499 #define TSC10_RATE_80           0x42
 500 #define TSC10_RATE_100          0x43
 501 #define TSC10_RATE_130          0x44
 502 #define TSC10_RATE_150          0x45
 503
 504 /* commands */
 505 #define TSC10_CMD_RESET         0x55
 506 #define TSC10_CMD_RATE          0x05
 507 #define TSC10_CMD_DATA1         0x01
 508
 509 static int dmc_tsc10_init(struct usbtouch_usb *usbtouch)
 510 {
 511         struct usb_device *dev = interface_to_usbdev(usbtouch->interface);
 512         int ret = -ENOMEM;
 513         unsigned char *buf;
 514
 515         buf = kmalloc(2, GFP_NOIO);
 516         if (!buf)
 517                 goto err_nobuf;
 518         /* reset */
 519         buf[0] = buf[1] = 0xFF;
 520         ret = usb_control_msg(dev, usb_rcvctrlpipe (dev, 0),
 521                               TSC10_CMD_RESET,
 522                               USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 523                               0, 0, buf, 2, USB_CTRL_SET_TIMEOUT);
 524         if (ret < 0)
 525                 goto err_out;
 526         if (buf[0] != 0x06) {
 527                 ret = -ENODEV;
 528                 goto err_out;
 529         }
 530
 531         /* set coordinate output rate */
 532         buf[0] = buf[1] = 0xFF;
 533         ret = usb_control_msg(dev, usb_rcvctrlpipe (dev, 0),
 534                               TSC10_CMD_RATE,
 535                               USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 536                               TSC10_RATE_150, 0, buf, 2, USB_CTRL_SET_TIMEOUT);
 537         if (ret < 0)
 538                 goto err_out;
 539         if ((buf[0] != 0x06) && (buf[0] != 0x15 || buf[1] != 0x01)) {
 540                 ret = -ENODEV;
 541                 goto err_out;
 542         }
 543
 544         /* start sending data */
 545         ret = usb_control_msg(dev, usb_rcvctrlpipe (dev, 0),
 546                               TSC10_CMD_DATA1,
 547                               USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 548                               0, 0, NULL, 0, USB_CTRL_SET_TIMEOUT);
 549 err_out:
 550         kfree(buf);
 551 err_nobuf:
 552         return ret;
 553 }
 554
 555
 556 static int dmc_tsc10_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 557 {
 558         dev->x = ((pkt[2] & 0x03) << 8) | pkt[1];
 559         dev->y = ((pkt[4] & 0x03) << 8) | pkt[3];
 560         dev->touch = pkt[0] & 0x01;
 561
 562         return 1;
 563 }
 564 #endif
 565
 566
 567 /*****************************************************************************
 568  * IRTOUCH Part
 569  */
 570 #ifdef CONFIG_TOUCHSCREEN_USB_IRTOUCH
 571 static int irtouch_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 572 {
 573         dev->x = (pkt[3] << 8) | pkt[2];
 574         dev->y = (pkt[5] << 8) | pkt[4];
 575         dev->touch = (pkt[1] & 0x03) ? 1 : 0;
 576
 577         return 1;
 578 }
 579 #endif
 580
 581 /*****************************************************************************
 582  * ET&T TC5UH/TC4UM part
 583  */
 584 #ifdef CONFIG_TOUCHSCREEN_USB_ETT_TC45USB
 585 static int tc45usb_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 586 {
 587         dev->x = ((pkt[2] & 0x0F) << 8) | pkt[1];
 588         dev->y = ((pkt[4] & 0x0F) << 8) | pkt[3];
 589         dev->touch = pkt[0] & 0x01;
 590
 591         return 1;
 592 }
 593 #endif
 594
 595 /*****************************************************************************
 596  * IdealTEK URTC1000 Part
 597  */
 598 #ifdef CONFIG_TOUCHSCREEN_USB_IDEALTEK
 599 #ifndef MULTI_PACKET
 600 #define MULTI_PACKET
 601 #endif
 602 static int idealtek_get_pkt_len(unsigned char *buf, int len)
 603 {
 604         if (buf[0] & 0x80)
 605                 return 5;
 606         if (buf[0] == 0x01)
 607                 return len;
 608         return 0;
 609 }
 610
 611 static int idealtek_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 612 {
 613         switch (pkt[0] & 0x98) {
 614         case 0x88:
 615                 /* touch data in IdealTEK mode */
 616                 dev->x = (pkt[1] << 5) | (pkt[2] >> 2);
 617                 dev->y = (pkt[3] << 5) | (pkt[4] >> 2);
 618                 dev->touch = (pkt[0] & 0x40) ? 1 : 0;
 619                 return 1;
 620
 621         case 0x98:
 622                 /* touch data in MT emulation mode */
 623                 dev->x = (pkt[2] << 5) | (pkt[1] >> 2);
 624                 dev->y = (pkt[4] << 5) | (pkt[3] >> 2);
 625                 dev->touch = (pkt[0] & 0x40) ? 1 : 0;
 626                 return 1;
 627
 628         default:
 629                 return 0;
 630         }
 631 }
 632 #endif
 633
 634 /*****************************************************************************
 635  * General Touch Part
 636  */
 637 #ifdef CONFIG_TOUCHSCREEN_USB_GENERAL_TOUCH
 638 static int general_touch_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 639 {
 640         dev->x = (pkt[2] << 8) | pkt[1];
 641         dev->y = (pkt[4] << 8) | pkt[3];
 642         dev->press = pkt[5] & 0xff;
 643         dev->touch = pkt[0] & 0x01;
 644
 645         return 1;
 646 }
 647 #endif
 648
 649 /*****************************************************************************
 650  * GoTop Part
 651  */
 652 #ifdef CONFIG_TOUCHSCREEN_USB_GOTOP
 653 static int gotop_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 654 {
 655         dev->x = ((pkt[1] & 0x38) << 4) | pkt[2];
 656         dev->y = ((pkt[1] & 0x07) << 7) | pkt[3];
 657         dev->touch = pkt[0] & 0x01;
 658
 659         return 1;
 660 }
 661 #endif
 662
 663 /*****************************************************************************
 664  * JASTEC Part
 665  */
 666 #ifdef CONFIG_TOUCHSCREEN_USB_JASTEC
 667 static int jastec_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 668 {
 669         dev->x = ((pkt[0] & 0x3f) << 6) | (pkt[2] & 0x3f);
 670         dev->y = ((pkt[1] & 0x3f) << 6) | (pkt[3] & 0x3f);
 671         dev->touch = (pkt[0] & 0x40) >> 6;
 672
 673         return 1;
 674 }
 675 #endif
 676
 677 /*****************************************************************************
 678  * Zytronic Part
 679  */
 680 #ifdef CONFIG_TOUCHSCREEN_USB_ZYTRONIC
 681 static int zytronic_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 682 {
 683         switch (pkt[0]) {
 684         case 0x3A: /* command response */
 685                 dbg("%s: Command response %d", __func__, pkt[1]);
 686                 break;
 687
 688         case 0xC0: /* down */
 689                 dev->x = (pkt[1] & 0x7f) | ((pkt[2] & 0x07) << 7);
 690                 dev->y = (pkt[3] & 0x7f) | ((pkt[4] & 0x07) << 7);
 691                 dev->touch = 1;
 692                 dbg("%s: down %d,%d", __func__, dev->x, dev->y);
 693                 return 1;
 694
 695         case 0x80: /* up */
 696                 dev->x = (pkt[1] & 0x7f) | ((pkt[2] & 0x07) << 7);
 697                 dev->y = (pkt[3] & 0x7f) | ((pkt[4] & 0x07) << 7);
 698                 dev->touch = 0;
 699                 dbg("%s: up %d,%d", __func__, dev->x, dev->y);
 700                 return 1;
 701
 702         default:
 703                 dbg("%s: Unknown return %d", __func__, pkt[0]);
 704                 break;
 705         }
 706
 707         return 0;
 708 }
 709 #endif
 710
 711 /*****************************************************************************
 712  * NEXIO Part
 713  */
 714 #ifdef CONFIG_TOUCHSCREEN_USB_NEXIO
 715
 716 #define NEXIO_TIMEOUT   5000
 717 #define NEXIO_BUFSIZE   1024
 718 #define NEXIO_THRESHOLD 50
 719
 720 struct nexio_priv {
 721         struct urb *ack;
 722         unsigned char *ack_buf;
 723 };
 724
 725 struct nexio_touch_packet {
 726         u8      flags;          /* 0xe1 = touch, 0xe1 = release */
 727         __be16  data_len;       /* total bytes of touch data */
 728         __be16  x_len;          /* bytes for X axis */
 729         __be16  y_len;          /* bytes for Y axis */
 730         u8      data[];
 731 } __attribute__ ((packed));
 732
 733 static unsigned char nexio_ack_pkt[2] = { 0xaa, 0x02 };
 734 static unsigned char nexio_init_pkt[4] = { 0x82, 0x04, 0x0a, 0x0f };
 735
 736 static void nexio_ack_complete(struct urb *urb)
 737 {
 738 }
 739
 740 static int nexio_alloc(struct usbtouch_usb *usbtouch)
 741 {
 742         struct nexio_priv *priv;
 743         int ret = -ENOMEM;
 744
 745         usbtouch->priv = kmalloc(sizeof(struct nexio_priv), GFP_KERNEL);
 746         if (!usbtouch->priv)
 747                 goto out_buf;
 748
 749         priv = usbtouch->priv;
 750
 751         priv->ack_buf = kmemdup(nexio_ack_pkt, sizeof(nexio_ack_pkt),
 752                                 GFP_KERNEL);
 753         if (!priv->ack_buf)
 754                 goto err_priv;
 755
 756         priv->ack = usb_alloc_urb(0, GFP_KERNEL);
 757         if (!priv->ack) {
 758                 dbg("%s - usb_alloc_urb failed: usbtouch->ack", __func__);
 759                 goto err_ack_buf;
 760         }
 761
 762         return 0;
 763
 764 err_ack_buf:
 765         kfree(priv->ack_buf);
 766 err_priv:
 767         kfree(priv);
 768 out_buf:
 769         return ret;
 770 }
 771
 772 static int nexio_init(struct usbtouch_usb *usbtouch)
 773 {
 774         struct usb_device *dev = interface_to_usbdev(usbtouch->interface);
 775         struct usb_host_interface *interface = usbtouch->interface->cur_altsetting;
 776         struct nexio_priv *priv = usbtouch->priv;
 777         int ret = -ENOMEM;
 778         int actual_len, i;
 779         unsigned char *buf;
 780         char *firmware_ver = NULL, *device_name = NULL;
 781         int input_ep = 0, output_ep = 0;
 782
 783         /* find first input and output endpoint */
 784         for (i = 0; i < interface->desc.bNumEndpoints; i++) {
 785                 if (!input_ep &&
 786                     usb_endpoint_dir_in(&interface->endpoint[i].desc))
 787                         input_ep = interface->endpoint[i].desc.bEndpointAddress;
 788                 if (!output_ep &&
 789                     usb_endpoint_dir_out(&interface->endpoint[i].desc))
 790                         output_ep = interface->endpoint[i].desc.bEndpointAddress;
 791         }
 792         if (!input_ep || !output_ep)
 793                 return -ENXIO;
 794
 795         buf = kmalloc(NEXIO_BUFSIZE, GFP_NOIO);
 796         if (!buf)
 797                 goto out_buf;
 798
 799         /* two empty reads */
 800         for (i = 0; i < 2; i++) {
 801                 ret = usb_bulk_msg(dev, usb_rcvbulkpipe(dev, input_ep),
 802                                    buf, NEXIO_BUFSIZE, &actual_len,
 803                                    NEXIO_TIMEOUT);
 804                 if (ret < 0)
 805                         goto out_buf;
 806         }
 807
 808         /* send init command */
 809         memcpy(buf, nexio_init_pkt, sizeof(nexio_init_pkt));
 810         ret = usb_bulk_msg(dev, usb_sndbulkpipe(dev, output_ep),
 811                            buf, sizeof(nexio_init_pkt), &actual_len,
 812                            NEXIO_TIMEOUT);
 813         if (ret < 0)
 814                 goto out_buf;
 815
 816         /* read replies */
 817         for (i = 0; i < 3; i++) {
 818                 memset(buf, 0, NEXIO_BUFSIZE);
 819                 ret = usb_bulk_msg(dev, usb_rcvbulkpipe(dev, input_ep),
 820                                    buf, NEXIO_BUFSIZE, &actual_len,
 821                                    NEXIO_TIMEOUT);
 822                 if (ret < 0 || actual_len < 1 || buf[1] != actual_len)
 823                         continue;
 824                 switch (buf[0]) {
 825                 case 0x83:      /* firmware version */
 826                         if (!firmware_ver)
 827                                 firmware_ver = kstrdup(&buf[2], GFP_NOIO);
 828                         break;
 829                 case 0x84:      /* device name */
 830                         if (!device_name)
 831                                 device_name = kstrdup(&buf[2], GFP_NOIO);
 832                         break;
 833                 }
 834         }
 835
 836         printk(KERN_INFO "Nexio device: %s, firmware version: %s\n",
 837                device_name, firmware_ver);
 838
 839         kfree(firmware_ver);
 840         kfree(device_name);
 841
 842         usb_fill_bulk_urb(priv->ack, dev, usb_sndbulkpipe(dev, output_ep),
 843                           priv->ack_buf, sizeof(nexio_ack_pkt),
 844                           nexio_ack_complete, usbtouch);
 845         ret = 0;
 846
 847 out_buf:
 848         kfree(buf);
 849         return ret;
 850 }
 851
 852 static void nexio_exit(struct usbtouch_usb *usbtouch)
 853 {
 854         struct nexio_priv *priv = usbtouch->priv;
 855
 856         usb_kill_urb(priv->ack);
 857         usb_free_urb(priv->ack);
 858         kfree(priv->ack_buf);
 859         kfree(priv);
 860 }
 861
 862 static int nexio_read_data(struct usbtouch_usb *usbtouch, unsigned char *pkt)
 863 {
 864         struct nexio_touch_packet *packet = (void *) pkt;
 865         struct nexio_priv *priv = usbtouch->priv;
 866         unsigned int data_len = be16_to_cpu(packet->data_len);
 867         unsigned int x_len = be16_to_cpu(packet->x_len);
 868         unsigned int y_len = be16_to_cpu(packet->y_len);
 869         int x, y, begin_x, begin_y, end_x, end_y, w, h, ret;
 870
 871         /* got touch data? */
 872         if ((pkt[0] & 0xe0) != 0xe0)
 873                 return 0;
 874
 875         if (data_len > 0xff)
 876                 data_len -= 0x100;
 877         if (x_len > 0xff)
 878                 x_len -= 0x80;
 879
 880         /* send ACK */
 881         ret = usb_submit_urb(priv->ack, GFP_ATOMIC);
 882
 883         if (!usbtouch->type->max_xc) {
 884                 usbtouch->type->max_xc = 2 * x_len;
 885                 input_set_abs_params(usbtouch->input, ABS_X,
 886                                      0, usbtouch->type->max_xc, 0, 0);
 887                 usbtouch->type->max_yc = 2 * y_len;
 888                 input_set_abs_params(usbtouch->input, ABS_Y,
 889                                      0, usbtouch->type->max_yc, 0, 0);
 890         }
 891         /*
 892          * The device reports state of IR sensors on X and Y axes.
 893          * Each byte represents "darkness" percentage (0-100) of one element.
 894          * 17" touchscreen reports only 64 x 52 bytes so the resolution is low.
 895          * This also means that there's a limited multi-touch capability but
 896          * it's disabled (and untested) here as there's no X driver for that.
 897          */
 898         begin_x = end_x = begin_y = end_y = -1;
 899         for (x = 0; x < x_len; x++) {
 900                 if (begin_x == -1 && packet->data[x] > NEXIO_THRESHOLD) {
 901                         begin_x = x;
 902                         continue;
 903                 }
 904                 if (end_x == -1 && begin_x != -1 && packet->data[x] < NEXIO_THRESHOLD) {
 905                         end_x = x - 1;
 906                         for (y = x_len; y < data_len; y++) {
 907                                 if (begin_y == -1 && packet->data[y] > NEXIO_THRESHOLD) {
 908                                         begin_y = y - x_len;
 909                                         continue;
 910                                 }
 911                                 if (end_y == -1 &&
 912                                     begin_y != -1 && packet->data[y] < NEXIO_THRESHOLD) {
 913                                         end_y = y - 1 - x_len;
 914                                         w = end_x - begin_x;
 915                                         h = end_y - begin_y;
 916 #if 0
 917                                         /* multi-touch */
 918                                         input_report_abs(usbtouch->input,
 919                                                     ABS_MT_TOUCH_MAJOR, max(w,h));
 920                                         input_report_abs(usbtouch->input,
 921                                                     ABS_MT_TOUCH_MINOR, min(x,h));
 922                                         input_report_abs(usbtouch->input,
 923                                                     ABS_MT_POSITION_X, 2*begin_x+w);
 924                                         input_report_abs(usbtouch->input,
 925                                                     ABS_MT_POSITION_Y, 2*begin_y+h);
 926                                         input_report_abs(usbtouch->input,
 927                                                     ABS_MT_ORIENTATION, w > h);
 928                                         input_mt_sync(usbtouch->input);
 929 #endif
 930                                         /* single touch */
 931                                         usbtouch->x = 2 * begin_x + w;
 932                                         usbtouch->y = 2 * begin_y + h;
 933                                         usbtouch->touch = packet->flags & 0x01;
 934                                         begin_y = end_y = -1;
 935                                         return 1;
 936                                 }
 937                         }
 938                         begin_x = end_x = -1;
 939                 }
 940
 941         }
 942         return 0;
 943 }
 944 #endif
 945
 946
 947 /*****************************************************************************
 948  * the different device descriptors
 949  */
 950 #ifdef MULTI_PACKET
 951 static void usbtouch_process_multi(struct usbtouch_usb *usbtouch,
 952                                    unsigned char *pkt, int len);
 953 #endif
 954
 955 static struct usbtouch_device_info usbtouch_dev_info[] = {
 956 #ifdef CONFIG_TOUCHSCREEN_USB_EGALAX
 957         [DEVTYPE_EGALAX] = {
 958                 .min_xc         = 0x0,
 959                 .max_xc         = 0x07ff,
 960                 .min_yc         = 0x0,
 961                 .max_yc         = 0x07ff,
 962                 .rept_size      = 16,
 963                 .process_pkt    = usbtouch_process_multi,
 964                 .get_pkt_len    = egalax_get_pkt_len,
 965                 .read_data      = egalax_read_data,
 966         },
 967 #endif
 968
 969 #ifdef CONFIG_TOUCHSCREEN_USB_PANJIT
 970         [DEVTYPE_PANJIT] = {
 971                 .min_xc         = 0x0,
 972                 .max_xc         = 0x0fff,
 973                 .min_yc         = 0x0,
 974                 .max_yc         = 0x0fff,
 975                 .rept_size      = 8,
 976                 .read_data      = panjit_read_data,
 977         },
 978 #endif
 979
 980 #ifdef CONFIG_TOUCHSCREEN_USB_3M
 981         [DEVTYPE_3M] = {
 982                 .min_xc         = 0x0,
 983                 .max_xc         = 0x4000,
 984                 .min_yc         = 0x0,
 985                 .max_yc         = 0x4000,
 986                 .rept_size      = 11,
 987                 .read_data      = mtouch_read_data,
 988                 .init           = mtouch_init,
 989         },
 990 #endif
 991
 992 #ifdef CONFIG_TOUCHSCREEN_USB_ITM
 993         [DEVTYPE_ITM] = {
 994                 .min_xc         = 0x0,
 995                 .max_xc         = 0x0fff,
 996                 .min_yc         = 0x0,
 997                 .max_yc         = 0x0fff,
 998                 .max_press      = 0xff,
 999                 .rept_size      = 8,
1000                 .read_data      = itm_read_data,
1001         },
1002 #endif
1003
1004 #ifdef CONFIG_TOUCHSCREEN_USB_ETURBO
1005         [DEVTYPE_ETURBO] = {
1006                 .min_xc         = 0x0,
1007                 .max_xc         = 0x07ff,
1008                 .min_yc         = 0x0,
1009                 .max_yc         = 0x07ff,
1010                 .rept_size      = 8,
1011                 .process_pkt    = usbtouch_process_multi,
1012                 .get_pkt_len    = eturbo_get_pkt_len,
1013                 .read_data      = eturbo_read_data,
1014         },
1015 #endif
1016
1017 #ifdef CONFIG_TOUCHSCREEN_USB_GUNZE
1018         [DEVTYPE_GUNZE] = {
1019                 .min_xc         = 0x0,
1020                 .max_xc         = 0x0fff,
1021                 .min_yc         = 0x0,
1022                 .max_yc         = 0x0fff,
1023                 .rept_size      = 4,
1024                 .read_data      = gunze_read_data,
1025         },
1026 #endif
1027
1028 #ifdef CONFIG_TOUCHSCREEN_USB_DMC_TSC10
1029         [DEVTYPE_DMC_TSC10] = {
1030                 .min_xc         = 0x0,
1031                 .max_xc         = 0x03ff,
1032                 .min_yc         = 0x0,
1033                 .max_yc         = 0x03ff,
1034                 .rept_size      = 5,
1035                 .init           = dmc_tsc10_init,
1036                 .read_data      = dmc_tsc10_read_data,
1037         },
1038 #endif
1039
1040 #ifdef CONFIG_TOUCHSCREEN_USB_IRTOUCH
1041         [DEVTYPE_IRTOUCH] = {
1042                 .min_xc         = 0x0,
1043                 .max_xc         = 0x0fff,
1044                 .min_yc         = 0x0,
1045                 .max_yc         = 0x0fff,
1046                 .rept_size      = 8,
1047                 .read_data      = irtouch_read_data,
1048         },
1049 #endif
1050
1051 #ifdef CONFIG_TOUCHSCREEN_USB_IDEALTEK
1052         [DEVTYPE_IDEALTEK] = {
1053                 .min_xc         = 0x0,
1054                 .max_xc         = 0x0fff,
1055                 .min_yc         = 0x0,
1056                 .max_yc         = 0x0fff,
1057                 .rept_size      = 8,
1058                 .process_pkt    = usbtouch_process_multi,
1059                 .get_pkt_len    = idealtek_get_pkt_len,
1060                 .read_data      = idealtek_read_data,
1061         },
1062 #endif
1063
1064 #ifdef CONFIG_TOUCHSCREEN_USB_GENERAL_TOUCH
1065         [DEVTYPE_GENERAL_TOUCH] = {
1066                 .min_xc         = 0x0,
1067                 .max_xc         = 0x7fff,
1068                 .min_yc         = 0x0,
1069                 .max_yc         = 0x7fff,
1070                 .rept_size      = 7,
1071                 .read_data      = general_touch_read_data,
1072         },
1073 #endif
1074
1075 #ifdef CONFIG_TOUCHSCREEN_USB_GOTOP
1076         [DEVTYPE_GOTOP] = {
1077                 .min_xc         = 0x0,
1078                 .max_xc         = 0x03ff,
1079                 .min_yc         = 0x0,
1080                 .max_yc         = 0x03ff,
1081                 .rept_size      = 4,
1082                 .read_data      = gotop_read_data,
1083         },
1084 #endif
1085
1086 #ifdef CONFIG_TOUCHSCREEN_USB_JASTEC
1087         [DEVTYPE_JASTEC] = {
1088                 .min_xc         = 0x0,
1089                 .max_xc         = 0x0fff,
1090                 .min_yc         = 0x0,
1091                 .max_yc         = 0x0fff,
1092                 .rept_size      = 4,
1093                 .read_data      = jastec_read_data,
1094         },
1095 #endif
1096
1097 #ifdef CONFIG_TOUCHSCREEN_USB_E2I
1098         [DEVTYPE_E2I] = {
1099                 .min_xc         = 0x0,
1100                 .max_xc         = 0x7fff,
1101                 .min_yc         = 0x0,
1102                 .max_yc         = 0x7fff,
1103                 .rept_size      = 6,
1104                 .init           = e2i_init,
1105                 .read_data      = e2i_read_data,
1106         },
1107 #endif
1108
1109 #ifdef CONFIG_TOUCHSCREEN_USB_ZYTRONIC
1110         [DEVTYPE_ZYTRONIC] = {
1111                 .min_xc         = 0x0,
1112                 .max_xc         = 0x03ff,
1113                 .min_yc         = 0x0,
1114                 .max_yc         = 0x03ff,
1115                 .rept_size      = 5,
1116                 .read_data      = zytronic_read_data,
1117                 .irq_always     = true,
1118         },
1119 #endif
1120
1121 #ifdef CONFIG_TOUCHSCREEN_USB_ETT_TC45USB
1122         [DEVTYPE_TC45USB] = {
1123                 .min_xc         = 0x0,
1124                 .max_xc         = 0x0fff,
1125                 .min_yc         = 0x0,
1126                 .max_yc         = 0x0fff,
1127                 .rept_size      = 5,
1128                 .read_data      = tc45usb_read_data,
1129         },
1130 #endif
1131
1132 #ifdef CONFIG_TOUCHSCREEN_USB_NEXIO
1133         [DEVTYPE_NEXIO] = {
1134                 .rept_size      = 1024,
1135                 .irq_always     = true,
1136                 .read_data      = nexio_read_data,
1137                 .alloc          = nexio_alloc,
1138                 .init           = nexio_init,
1139                 .exit           = nexio_exit,
1140         },
1141 #endif
1142 };
1143
1144
1145 /*****************************************************************************
1146  * Generic Part
1147  */
1148 static void usbtouch_process_pkt(struct usbtouch_usb *usbtouch,
1149                                  unsigned char *pkt, int len)
1150 {
1151         struct usbtouch_device_info *type = usbtouch->type;
1152
1153         if (!type->read_data(usbtouch, pkt))
1154                         return;
1155
1156         input_report_key(usbtouch->input, BTN_TOUCH, usbtouch->touch);
1157
1158         if (swap_xy) {
1159                 input_report_abs(usbtouch->input, ABS_X, usbtouch->y);
1160                 input_report_abs(usbtouch->input, ABS_Y, usbtouch->x);
1161         } else {
1162                 input_report_abs(usbtouch->input, ABS_X, usbtouch->x);
1163                 input_report_abs(usbtouch->input, ABS_Y, usbtouch->y);
1164         }
1165         if (type->max_press)
1166                 input_report_abs(usbtouch->input, ABS_PRESSURE, usbtouch->press);
1167         input_sync(usbtouch->input);
1168 }
1169
1170
1171 #ifdef MULTI_PACKET
1172 static void usbtouch_process_multi(struct usbtouch_usb *usbtouch,
1173                                    unsigned char *pkt, int len)
1174 {
1175         unsigned char *buffer;
1176         int pkt_len, pos, buf_len, tmp;
1177
1178         /* process buffer */
1179         if (unlikely(usbtouch->buf_len)) {
1180                 /* try to get size */
1181                 pkt_len = usbtouch->type->get_pkt_len(
1182                                 usbtouch->buffer, usbtouch->buf_len);
1183
1184                 /* drop? */
1185                 if (unlikely(!pkt_len))
1186                         goto out_flush_buf;
1187
1188                 /* need to append -pkt_len bytes before able to get size */
1189                 if (unlikely(pkt_len < 0)) {
1190                         int append = -pkt_len;
1191                         if (unlikely(append > len))
1192                                append = len;
1193                         if (usbtouch->buf_len + append >= usbtouch->type->rept_size)
1194                                 goto out_flush_buf;
1195                         memcpy(usbtouch->buffer + usbtouch->buf_len, pkt, append);
1196                         usbtouch->buf_len += append;
1197
1198                         pkt_len = usbtouch->type->get_pkt_len(
1199                                         usbtouch->buffer, usbtouch->buf_len);
1200                         if (pkt_len < 0)
1201                                 return;
1202                 }
1203
1204                 /* append */
1205                 tmp = pkt_len - usbtouch->buf_len;
1206                 if (usbtouch->buf_len + tmp >= usbtouch->type->rept_size)
1207                         goto out_flush_buf;
1208                 memcpy(usbtouch->buffer + usbtouch->buf_len, pkt, tmp);
1209                 usbtouch_process_pkt(usbtouch, usbtouch->buffer, pkt_len);
1210
1211                 buffer = pkt + tmp;
1212                 buf_len = len - tmp;
1213         } else {
1214                 buffer = pkt;
1215                 buf_len = len;
1216         }
1217
1218         /* loop over the received packet, process */
1219         pos = 0;
1220         while (pos < buf_len) {
1221                 /* get packet len */
1222                 pkt_len = usbtouch->type->get_pkt_len(buffer + pos,
1223                                                         buf_len - pos);
1224
1225                 /* unknown packet: skip one byte */
1226                 if (unlikely(!pkt_len)) {
1227                         pos++;
1228                         continue;
1229                 }
1230
1231                 /* full packet: process */
1232                 if (likely((pkt_len > 0) && (pkt_len <= buf_len - pos))) {
1233                         usbtouch_process_pkt(usbtouch, buffer + pos, pkt_len);
1234                 } else {
1235                         /* incomplete packet: save in buffer */
1236                         memcpy(usbtouch->buffer, buffer + pos, buf_len - pos);
1237                         usbtouch->buf_len = buf_len - pos;
1238                         return;
1239                 }
1240                 pos += pkt_len;
1241         }
1242
1243 out_flush_buf:
1244         usbtouch->buf_len = 0;
1245         return;
1246 }
1247 #endif
1248
1249
1250 static void usbtouch_irq(struct urb *urb)
1251 {
1252         struct usbtouch_usb *usbtouch = urb->context;
1253         int retval;
1254
1255         switch (urb->status) {
1256         case 0:
1257                 /* success */
1258                 break;
1259         case -ETIME:
1260                 /* this urb is timing out */
1261                 dbg("%s - urb timed out - was the device unplugged?",
1262                     __func__);
1263                 return;
1264         case -ECONNRESET:
1265         case -ENOENT:
1266         case -ESHUTDOWN:
1267         case -EPIPE:
1268                 /* this urb is terminated, clean up */
1269                 dbg("%s - urb shutting down with status: %d",
1270                     __func__, urb->status);
1271                 return;
1272         default:
1273                 dbg("%s - nonzero urb status received: %d",
1274                     __func__, urb->status);
1275                 goto exit;
1276         }
1277
1278         usbtouch->type->process_pkt(usbtouch, usbtouch->data, urb->actual_length);
1279
1280 exit:
1281         usb_mark_last_busy(interface_to_usbdev(usbtouch->interface));
1282         retval = usb_submit_urb(urb, GFP_ATOMIC);
1283         if (retval)
1284                 err("%s - usb_submit_urb failed with result: %d",
1285                     __func__, retval);
1286 }
1287
1288 static int usbtouch_open(struct input_dev *input)
1289 {
1290         struct usbtouch_usb *usbtouch = input_get_drvdata(input);
1291         int r;
1292
1293         usbtouch->irq->dev = interface_to_usbdev(usbtouch->interface);
1294
1295         r = usb_autopm_get_interface(usbtouch->interface) ? -EIO : 0;
1296         if (r < 0)
1297                 goto out;
1298
1299         if (!usbtouch->type->irq_always) {
1300                 if (usb_submit_urb(usbtouch->irq, GFP_KERNEL)) {
1301                         r = -EIO;
1302                         goto out_put;
1303                 }
1304         }
1305
1306         usbtouch->interface->needs_remote_wakeup = 1;
1307 out_put:
1308         usb_autopm_put_interface(usbtouch->interface);
1309 out:
1310         return r;
1311 }
1312
1313 static void usbtouch_close(struct input_dev *input)
1314 {
1315         struct usbtouch_usb *usbtouch = input_get_drvdata(input);
1316         int r;
1317
1318         if (!usbtouch->type->irq_always)
1319                 usb_kill_urb(usbtouch->irq);
1320         r = usb_autopm_get_interface(usbtouch->interface);
1321         usbtouch->interface->needs_remote_wakeup = 0;
1322         if (!r)
1323                 usb_autopm_put_interface(usbtouch->interface);
1324 }
1325
1326 static int usbtouch_suspend
1327 (struct usb_interface *intf, pm_message_t message)
1328 {
1329         struct usbtouch_usb *usbtouch = usb_get_intfdata(intf);
1330
1331         usb_kill_urb(usbtouch->irq);
1332
1333         return 0;
1334 }
1335
1336 static int usbtouch_resume(struct usb_interface *intf)
1337 {
1338         struct usbtouch_usb *usbtouch = usb_get_intfdata(intf);
1339         struct input_dev *input = usbtouch->input;
1340         int result = 0;
1341
1342         mutex_lock(&input->mutex);
1343         if (input->users || usbtouch->type->irq_always)
1344                 result = usb_submit_urb(usbtouch->irq, GFP_NOIO);
1345         mutex_unlock(&input->mutex);
1346
1347         return result;
1348 }
1349
1350 static int usbtouch_reset_resume(struct usb_interface *intf)
1351 {
1352         struct usbtouch_usb *usbtouch = usb_get_intfdata(intf);
1353         struct input_dev *input = usbtouch->input;
1354         int err = 0;
1355
1356         /* reinit the device */
1357         if (usbtouch->type->init) {
1358                 err = usbtouch->type->init(usbtouch);
1359                 if (err) {
1360                         dbg("%s - type->init() failed, err: %d",
1361                             __func__, err);
1362                         return err;
1363                 }
1364         }
1365
1366         /* restart IO if needed */
1367         mutex_lock(&input->mutex);
1368         if (input->users)
1369                 err = usb_submit_urb(usbtouch->irq, GFP_NOIO);
1370         mutex_unlock(&input->mutex);
1371
1372         return err;
1373 }
1374
1375 static void usbtouch_free_buffers(struct usb_device *udev,
1376                                   struct usbtouch_usb *usbtouch)
1377 {
1378         usb_free_coherent(udev, usbtouch->type->rept_size,
1379                           usbtouch->data, usbtouch->data_dma);
1380         kfree(usbtouch->buffer);
1381 }
1382
1383 static struct usb_endpoint_descriptor *
1384 usbtouch_get_input_endpoint(struct usb_host_interface *interface)
1385 {
1386         int i;
1387
1388         for (i = 0; i < interface->desc.bNumEndpoints; i++)
1389                 if (usb_endpoint_dir_in(&interface->endpoint[i].desc))
1390                         return &interface->endpoint[i].desc;
1391
1392         return NULL;
1393 }
1394
1395 static int usbtouch_probe(struct usb_interface *intf,
1396                           const struct usb_device_id *id)
1397 {
1398         struct usbtouch_usb *usbtouch;
1399         struct input_dev *input_dev;
1400         struct usb_endpoint_descriptor *endpoint;
1401         struct usb_device *udev = interface_to_usbdev(intf);
1402         struct usbtouch_device_info *type;
1403         int err = -ENOMEM;
1404
1405         /* some devices are ignored */
1406         if (id->driver_info == DEVTYPE_IGNORE)
1407                 return -ENODEV;
1408
1409         endpoint = usbtouch_get_input_endpoint(intf->cur_altsetting);
1410         if (!endpoint)
1411                 return -ENXIO;
1412
1413         usbtouch = kzalloc(sizeof(struct usbtouch_usb), GFP_KERNEL);
1414         input_dev = input_allocate_device();
1415         if (!usbtouch || !input_dev)
1416                 goto out_free;
1417
1418         type = &usbtouch_dev_info[id->driver_info];
1419         usbtouch->type = type;
1420         if (!type->process_pkt)
1421                 type->process_pkt = usbtouch_process_pkt;
1422
1423         usbtouch->data = usb_alloc_coherent(udev, type->rept_size,
1424                                             GFP_KERNEL, &usbtouch->data_dma);
1425         if (!usbtouch->data)
1426                 goto out_free;
1427
1428         if (type->get_pkt_len) {
1429                 usbtouch->buffer = kmalloc(type->rept_size, GFP_KERNEL);
1430                 if (!usbtouch->buffer)
1431                         goto out_free_buffers;
1432         }
1433
1434         usbtouch->irq = usb_alloc_urb(0, GFP_KERNEL);
1435         if (!usbtouch->irq) {
1436                 dbg("%s - usb_alloc_urb failed: usbtouch->irq", __func__);
1437                 goto out_free_buffers;
1438         }
1439
1440         usbtouch->interface = intf;
1441         usbtouch->input = input_dev;
1442
1443         if (udev->manufacturer)
1444                 strlcpy(usbtouch->name, udev->manufacturer, sizeof(usbtouch->name));
1445
1446         if (udev->product) {
1447                 if (udev->manufacturer)
1448                         strlcat(usbtouch->name, " ", sizeof(usbtouch->name));
1449                 strlcat(usbtouch->name, udev->product, sizeof(usbtouch->name));
1450         }
1451
1452         if (!strlen(usbtouch->name))
1453                 snprintf(usbtouch->name, sizeof(usbtouch->name),
1454                         "USB Touchscreen %04x:%04x",
1455                          le16_to_cpu(udev->descriptor.idVendor),
1456                          le16_to_cpu(udev->descriptor.idProduct));
1457
1458         usb_make_path(udev, usbtouch->phys, sizeof(usbtouch->phys));
1459         strlcat(usbtouch->phys, "/input0", sizeof(usbtouch->phys));
1460
1461         input_dev->name = usbtouch->name;
1462         input_dev->phys = usbtouch->phys;
1463         usb_to_input_id(udev, &input_dev->id);
1464         input_dev->dev.parent = &intf->dev;
1465
1466         input_set_drvdata(input_dev, usbtouch);
1467
1468         input_dev->open = usbtouch_open;
1469         input_dev->close = usbtouch_close;
1470
1471         input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
1472         input_dev->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH);
1473         input_set_abs_params(input_dev, ABS_X, type->min_xc, type->max_xc, 0, 0);
1474         input_set_abs_params(input_dev, ABS_Y, type->min_yc, type->max_yc, 0, 0);
1475         if (type->max_press)
1476                 input_set_abs_params(input_dev, ABS_PRESSURE, type->min_press,
1477                                      type->max_press, 0, 0);
1478
1479         if (usb_endpoint_type(endpoint) == USB_ENDPOINT_XFER_INT)
1480                 usb_fill_int_urb(usbtouch->irq, udev,
1481                          usb_rcvintpipe(udev, endpoint->bEndpointAddress),
1482                          usbtouch->data, type->rept_size,
1483                          usbtouch_irq, usbtouch, endpoint->bInterval);
1484         else
1485                 usb_fill_bulk_urb(usbtouch->irq, udev,
1486                          usb_rcvbulkpipe(udev, endpoint->bEndpointAddress),
1487                          usbtouch->data, type->rept_size,
1488                          usbtouch_irq, usbtouch);
1489
1490         usbtouch->irq->dev = udev;
1491         usbtouch->irq->transfer_dma = usbtouch->data_dma;
1492         usbtouch->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1493
1494         /* device specific allocations */
1495         if (type->alloc) {
1496                 err = type->alloc(usbtouch);
1497                 if (err) {
1498                         dbg("%s - type->alloc() failed, err: %d", __func__, err);
1499                         goto out_free_urb;
1500                 }
1501         }
1502
1503         /* device specific initialisation*/
1504         if (type->init) {
1505                 err = type->init(usbtouch);
1506                 if (err) {
1507                         dbg("%s - type->init() failed, err: %d", __func__, err);
1508                         goto out_do_exit;
1509                 }
1510         }
1511
1512         err = input_register_device(usbtouch->input);
1513         if (err) {
1514                 dbg("%s - input_register_device failed, err: %d", __func__, err);
1515                 goto out_do_exit;
1516         }
1517
1518         usb_set_intfdata(intf, usbtouch);
1519
1520         if (usbtouch->type->irq_always) {
1521                 /* this can't fail */
1522                 usb_autopm_get_interface(intf);
1523                 err = usb_submit_urb(usbtouch->irq, GFP_KERNEL);
1524                 if (err) {
1525                         usb_autopm_put_interface(intf);
1526                         err("%s - usb_submit_urb failed with result: %d",
1527                             __func__, err);
1528                         goto out_unregister_input;
1529                 }
1530         }
1531
1532         return 0;
1533
1534 out_unregister_input:
1535         input_unregister_device(input_dev);
1536         input_dev = NULL;
1537 out_do_exit:
1538         if (type->exit)
1539                 type->exit(usbtouch);
1540 out_free_urb:
1541         usb_free_urb(usbtouch->irq);
1542 out_free_buffers:
1543         usbtouch_free_buffers(udev, usbtouch);
1544 out_free:
1545         input_free_device(input_dev);
1546         kfree(usbtouch);
1547         return err;
1548 }
1549
1550 static void usbtouch_disconnect(struct usb_interface *intf)
1551 {
1552         struct usbtouch_usb *usbtouch = usb_get_intfdata(intf);
1553
1554         dbg("%s - called", __func__);
1555
1556         if (!usbtouch)
1557                 return;
1558
1559         dbg("%s - usbtouch is initialized, cleaning up", __func__);
1560         usb_set_intfdata(intf, NULL);
1561         /* this will stop IO via close */
1562         input_unregister_device(usbtouch->input);
1563         usb_free_urb(usbtouch->irq);
1564         if (usbtouch->type->exit)
1565                 usbtouch->type->exit(usbtouch);
1566         usbtouch_free_buffers(interface_to_usbdev(intf), usbtouch);
1567         kfree(usbtouch);
1568 }
1569
1570 MODULE_DEVICE_TABLE(usb, usbtouch_devices);
1571
1572 static struct usb_driver usbtouch_driver = {
1573         .name           = "usbtouchscreen",
1574         .probe          = usbtouch_probe,
1575         .disconnect     = usbtouch_disconnect,
1576         .suspend        = usbtouch_suspend,
1577         .resume         = usbtouch_resume,
1578         .reset_resume   = usbtouch_reset_resume,
1579         .id_table       = usbtouch_devices,
1580         .supports_autosuspend = 1,
1581 };
1582
1583 static int __init usbtouch_init(void)
1584 {
1585         return usb_register(&usbtouch_driver);
1586 }
1587
1588 static void __exit usbtouch_cleanup(void)
1589 {
1590         usb_deregister(&usbtouch_driver);
1591 }
1592
1593 module_init(usbtouch_init);
1594 module_exit(usbtouch_cleanup);
1595
1596 MODULE_AUTHOR(DRIVER_AUTHOR);
1597 MODULE_DESCRIPTION(DRIVER_DESC);
1598 MODULE_LICENSE("GPL");
1599
1600 MODULE_ALIAS("touchkitusb");
1601 MODULE_ALIAS("itmtouch");
1602 MODULE_ALIAS("mtouchusb");