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         /* TSC-25 data sheet specifies a delay after the RESET command */
 532         msleep(150);
 533
 534         /* set coordinate output rate */
 535         buf[0] = buf[1] = 0xFF;
 536         ret = usb_control_msg(dev, usb_rcvctrlpipe (dev, 0),
 537                               TSC10_CMD_RATE,
 538                               USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 539                               TSC10_RATE_150, 0, buf, 2, USB_CTRL_SET_TIMEOUT);
 540         if (ret < 0)
 541                 goto err_out;
 542         if ((buf[0] != 0x06) && (buf[0] != 0x15 || buf[1] != 0x01)) {
 543                 ret = -ENODEV;
 544                 goto err_out;
 545         }
 546
 547         /* start sending data */
 548         ret = usb_control_msg(dev, usb_rcvctrlpipe (dev, 0),
 549                               TSC10_CMD_DATA1,
 550                               USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 551                               0, 0, NULL, 0, USB_CTRL_SET_TIMEOUT);
 552 err_out:
 553         kfree(buf);
 554 err_nobuf:
 555         return ret;
 556 }
 557
 558
 559 static int dmc_tsc10_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 560 {
 561         dev->x = ((pkt[2] & 0x03) << 8) | pkt[1];
 562         dev->y = ((pkt[4] & 0x03) << 8) | pkt[3];
 563         dev->touch = pkt[0] & 0x01;
 564
 565         return 1;
 566 }
 567 #endif
 568
 569
 570 /*****************************************************************************
 571  * IRTOUCH Part
 572  */
 573 #ifdef CONFIG_TOUCHSCREEN_USB_IRTOUCH
 574 static int irtouch_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 575 {
 576         dev->x = (pkt[3] << 8) | pkt[2];
 577         dev->y = (pkt[5] << 8) | pkt[4];
 578         dev->touch = (pkt[1] & 0x03) ? 1 : 0;
 579
 580         return 1;
 581 }
 582 #endif
 583
 584 /*****************************************************************************
 585  * ET&T TC5UH/TC4UM part
 586  */
 587 #ifdef CONFIG_TOUCHSCREEN_USB_ETT_TC45USB
 588 static int tc45usb_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 589 {
 590         dev->x = ((pkt[2] & 0x0F) << 8) | pkt[1];
 591         dev->y = ((pkt[4] & 0x0F) << 8) | pkt[3];
 592         dev->touch = pkt[0] & 0x01;
 593
 594         return 1;
 595 }
 596 #endif
 597
 598 /*****************************************************************************
 599  * IdealTEK URTC1000 Part
 600  */
 601 #ifdef CONFIG_TOUCHSCREEN_USB_IDEALTEK
 602 #ifndef MULTI_PACKET
 603 #define MULTI_PACKET
 604 #endif
 605 static int idealtek_get_pkt_len(unsigned char *buf, int len)
 606 {
 607         if (buf[0] & 0x80)
 608                 return 5;
 609         if (buf[0] == 0x01)
 610                 return len;
 611         return 0;
 612 }
 613
 614 static int idealtek_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 615 {
 616         switch (pkt[0] & 0x98) {
 617         case 0x88:
 618                 /* touch data in IdealTEK mode */
 619                 dev->x = (pkt[1] << 5) | (pkt[2] >> 2);
 620                 dev->y = (pkt[3] << 5) | (pkt[4] >> 2);
 621                 dev->touch = (pkt[0] & 0x40) ? 1 : 0;
 622                 return 1;
 623
 624         case 0x98:
 625                 /* touch data in MT emulation mode */
 626                 dev->x = (pkt[2] << 5) | (pkt[1] >> 2);
 627                 dev->y = (pkt[4] << 5) | (pkt[3] >> 2);
 628                 dev->touch = (pkt[0] & 0x40) ? 1 : 0;
 629                 return 1;
 630
 631         default:
 632                 return 0;
 633         }
 634 }
 635 #endif
 636
 637 /*****************************************************************************
 638  * General Touch Part
 639  */
 640 #ifdef CONFIG_TOUCHSCREEN_USB_GENERAL_TOUCH
 641 static int general_touch_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 642 {
 643         dev->x = (pkt[2] << 8) | pkt[1];
 644         dev->y = (pkt[4] << 8) | pkt[3];
 645         dev->press = pkt[5] & 0xff;
 646         dev->touch = pkt[0] & 0x01;
 647
 648         return 1;
 649 }
 650 #endif
 651
 652 /*****************************************************************************
 653  * GoTop Part
 654  */
 655 #ifdef CONFIG_TOUCHSCREEN_USB_GOTOP
 656 static int gotop_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 657 {
 658         dev->x = ((pkt[1] & 0x38) << 4) | pkt[2];
 659         dev->y = ((pkt[1] & 0x07) << 7) | pkt[3];
 660         dev->touch = pkt[0] & 0x01;
 661
 662         return 1;
 663 }
 664 #endif
 665
 666 /*****************************************************************************
 667  * JASTEC Part
 668  */
 669 #ifdef CONFIG_TOUCHSCREEN_USB_JASTEC
 670 static int jastec_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 671 {
 672         dev->x = ((pkt[0] & 0x3f) << 6) | (pkt[2] & 0x3f);
 673         dev->y = ((pkt[1] & 0x3f) << 6) | (pkt[3] & 0x3f);
 674         dev->touch = (pkt[0] & 0x40) >> 6;
 675
 676         return 1;
 677 }
 678 #endif
 679
 680 /*****************************************************************************
 681  * Zytronic Part
 682  */
 683 #ifdef CONFIG_TOUCHSCREEN_USB_ZYTRONIC
 684 static int zytronic_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 685 {
 686         switch (pkt[0]) {
 687         case 0x3A: /* command response */
 688                 dbg("%s: Command response %d", __func__, pkt[1]);
 689                 break;
 690
 691         case 0xC0: /* down */
 692                 dev->x = (pkt[1] & 0x7f) | ((pkt[2] & 0x07) << 7);
 693                 dev->y = (pkt[3] & 0x7f) | ((pkt[4] & 0x07) << 7);
 694                 dev->touch = 1;
 695                 dbg("%s: down %d,%d", __func__, dev->x, dev->y);
 696                 return 1;
 697
 698         case 0x80: /* up */
 699                 dev->x = (pkt[1] & 0x7f) | ((pkt[2] & 0x07) << 7);
 700                 dev->y = (pkt[3] & 0x7f) | ((pkt[4] & 0x07) << 7);
 701                 dev->touch = 0;
 702                 dbg("%s: up %d,%d", __func__, dev->x, dev->y);
 703                 return 1;
 704
 705         default:
 706                 dbg("%s: Unknown return %d", __func__, pkt[0]);
 707                 break;
 708         }
 709
 710         return 0;
 711 }
 712 #endif
 713
 714 /*****************************************************************************
 715  * NEXIO Part
 716  */
 717 #ifdef CONFIG_TOUCHSCREEN_USB_NEXIO
 718
 719 #define NEXIO_TIMEOUT   5000
 720 #define NEXIO_BUFSIZE   1024
 721 #define NEXIO_THRESHOLD 50
 722
 723 struct nexio_priv {
 724         struct urb *ack;
 725         unsigned char *ack_buf;
 726 };
 727
 728 struct nexio_touch_packet {
 729         u8      flags;          /* 0xe1 = touch, 0xe1 = release */
 730         __be16  data_len;       /* total bytes of touch data */
 731         __be16  x_len;          /* bytes for X axis */
 732         __be16  y_len;          /* bytes for Y axis */
 733         u8      data[];
 734 } __attribute__ ((packed));
 735
 736 static unsigned char nexio_ack_pkt[2] = { 0xaa, 0x02 };
 737 static unsigned char nexio_init_pkt[4] = { 0x82, 0x04, 0x0a, 0x0f };
 738
 739 static void nexio_ack_complete(struct urb *urb)
 740 {
 741 }
 742
 743 static int nexio_alloc(struct usbtouch_usb *usbtouch)
 744 {
 745         struct nexio_priv *priv;
 746         int ret = -ENOMEM;
 747
 748         usbtouch->priv = kmalloc(sizeof(struct nexio_priv), GFP_KERNEL);
 749         if (!usbtouch->priv)
 750                 goto out_buf;
 751
 752         priv = usbtouch->priv;
 753
 754         priv->ack_buf = kmemdup(nexio_ack_pkt, sizeof(nexio_ack_pkt),
 755                                 GFP_KERNEL);
 756         if (!priv->ack_buf)
 757                 goto err_priv;
 758
 759         priv->ack = usb_alloc_urb(0, GFP_KERNEL);
 760         if (!priv->ack) {
 761                 dbg("%s - usb_alloc_urb failed: usbtouch->ack", __func__);
 762                 goto err_ack_buf;
 763         }
 764
 765         return 0;
 766
 767 err_ack_buf:
 768         kfree(priv->ack_buf);
 769 err_priv:
 770         kfree(priv);
 771 out_buf:
 772         return ret;
 773 }
 774
 775 static int nexio_init(struct usbtouch_usb *usbtouch)
 776 {
 777         struct usb_device *dev = interface_to_usbdev(usbtouch->interface);
 778         struct usb_host_interface *interface = usbtouch->interface->cur_altsetting;
 779         struct nexio_priv *priv = usbtouch->priv;
 780         int ret = -ENOMEM;
 781         int actual_len, i;
 782         unsigned char *buf;
 783         char *firmware_ver = NULL, *device_name = NULL;
 784         int input_ep = 0, output_ep = 0;
 785
 786         /* find first input and output endpoint */
 787         for (i = 0; i < interface->desc.bNumEndpoints; i++) {
 788                 if (!input_ep &&
 789                     usb_endpoint_dir_in(&interface->endpoint[i].desc))
 790                         input_ep = interface->endpoint[i].desc.bEndpointAddress;
 791                 if (!output_ep &&
 792                     usb_endpoint_dir_out(&interface->endpoint[i].desc))
 793                         output_ep = interface->endpoint[i].desc.bEndpointAddress;
 794         }
 795         if (!input_ep || !output_ep)
 796                 return -ENXIO;
 797
 798         buf = kmalloc(NEXIO_BUFSIZE, GFP_NOIO);
 799         if (!buf)
 800                 goto out_buf;
 801
 802         /* two empty reads */
 803         for (i = 0; i < 2; i++) {
 804                 ret = usb_bulk_msg(dev, usb_rcvbulkpipe(dev, input_ep),
 805                                    buf, NEXIO_BUFSIZE, &actual_len,
 806                                    NEXIO_TIMEOUT);
 807                 if (ret < 0)
 808                         goto out_buf;
 809         }
 810
 811         /* send init command */
 812         memcpy(buf, nexio_init_pkt, sizeof(nexio_init_pkt));
 813         ret = usb_bulk_msg(dev, usb_sndbulkpipe(dev, output_ep),
 814                            buf, sizeof(nexio_init_pkt), &actual_len,
 815                            NEXIO_TIMEOUT);
 816         if (ret < 0)
 817                 goto out_buf;
 818
 819         /* read replies */
 820         for (i = 0; i < 3; i++) {
 821                 memset(buf, 0, NEXIO_BUFSIZE);
 822                 ret = usb_bulk_msg(dev, usb_rcvbulkpipe(dev, input_ep),
 823                                    buf, NEXIO_BUFSIZE, &actual_len,
 824                                    NEXIO_TIMEOUT);
 825                 if (ret < 0 || actual_len < 1 || buf[1] != actual_len)
 826                         continue;
 827                 switch (buf[0]) {
 828                 case 0x83:      /* firmware version */
 829                         if (!firmware_ver)
 830                                 firmware_ver = kstrdup(&buf[2], GFP_NOIO);
 831                         break;
 832                 case 0x84:      /* device name */
 833                         if (!device_name)
 834                                 device_name = kstrdup(&buf[2], GFP_NOIO);
 835                         break;
 836                 }
 837         }
 838
 839         printk(KERN_INFO "Nexio device: %s, firmware version: %s\n",
 840                device_name, firmware_ver);
 841
 842         kfree(firmware_ver);
 843         kfree(device_name);
 844
 845         usb_fill_bulk_urb(priv->ack, dev, usb_sndbulkpipe(dev, output_ep),
 846                           priv->ack_buf, sizeof(nexio_ack_pkt),
 847                           nexio_ack_complete, usbtouch);
 848         ret = 0;
 849
 850 out_buf:
 851         kfree(buf);
 852         return ret;
 853 }
 854
 855 static void nexio_exit(struct usbtouch_usb *usbtouch)
 856 {
 857         struct nexio_priv *priv = usbtouch->priv;
 858
 859         usb_kill_urb(priv->ack);
 860         usb_free_urb(priv->ack);
 861         kfree(priv->ack_buf);
 862         kfree(priv);
 863 }
 864
 865 static int nexio_read_data(struct usbtouch_usb *usbtouch, unsigned char *pkt)
 866 {
 867         struct nexio_touch_packet *packet = (void *) pkt;
 868         struct nexio_priv *priv = usbtouch->priv;
 869         unsigned int data_len = be16_to_cpu(packet->data_len);
 870         unsigned int x_len = be16_to_cpu(packet->x_len);
 871         unsigned int y_len = be16_to_cpu(packet->y_len);
 872         int x, y, begin_x, begin_y, end_x, end_y, w, h, ret;
 873
 874         /* got touch data? */
 875         if ((pkt[0] & 0xe0) != 0xe0)
 876                 return 0;
 877
 878         if (data_len > 0xff)
 879                 data_len -= 0x100;
 880         if (x_len > 0xff)
 881                 x_len -= 0x80;
 882
 883         /* send ACK */
 884         ret = usb_submit_urb(priv->ack, GFP_ATOMIC);
 885
 886         if (!usbtouch->type->max_xc) {
 887                 usbtouch->type->max_xc = 2 * x_len;
 888                 input_set_abs_params(usbtouch->input, ABS_X,
 889                                      0, usbtouch->type->max_xc, 0, 0);
 890                 usbtouch->type->max_yc = 2 * y_len;
 891                 input_set_abs_params(usbtouch->input, ABS_Y,
 892                                      0, usbtouch->type->max_yc, 0, 0);
 893         }
 894         /*
 895          * The device reports state of IR sensors on X and Y axes.
 896          * Each byte represents "darkness" percentage (0-100) of one element.
 897          * 17" touchscreen reports only 64 x 52 bytes so the resolution is low.
 898          * This also means that there's a limited multi-touch capability but
 899          * it's disabled (and untested) here as there's no X driver for that.
 900          */
 901         begin_x = end_x = begin_y = end_y = -1;
 902         for (x = 0; x < x_len; x++) {
 903                 if (begin_x == -1 && packet->data[x] > NEXIO_THRESHOLD) {
 904                         begin_x = x;
 905                         continue;
 906                 }
 907                 if (end_x == -1 && begin_x != -1 && packet->data[x] < NEXIO_THRESHOLD) {
 908                         end_x = x - 1;
 909                         for (y = x_len; y < data_len; y++) {
 910                                 if (begin_y == -1 && packet->data[y] > NEXIO_THRESHOLD) {
 911                                         begin_y = y - x_len;
 912                                         continue;
 913                                 }
 914                                 if (end_y == -1 &&
 915                                     begin_y != -1 && packet->data[y] < NEXIO_THRESHOLD) {
 916                                         end_y = y - 1 - x_len;
 917                                         w = end_x - begin_x;
 918                                         h = end_y - begin_y;
 919 #if 0
 920                                         /* multi-touch */
 921                                         input_report_abs(usbtouch->input,
 922                                                     ABS_MT_TOUCH_MAJOR, max(w,h));
 923                                         input_report_abs(usbtouch->input,
 924                                                     ABS_MT_TOUCH_MINOR, min(x,h));
 925                                         input_report_abs(usbtouch->input,
 926                                                     ABS_MT_POSITION_X, 2*begin_x+w);
 927                                         input_report_abs(usbtouch->input,
 928                                                     ABS_MT_POSITION_Y, 2*begin_y+h);
 929                                         input_report_abs(usbtouch->input,
 930                                                     ABS_MT_ORIENTATION, w > h);
 931                                         input_mt_sync(usbtouch->input);
 932 #endif
 933                                         /* single touch */
 934                                         usbtouch->x = 2 * begin_x + w;
 935                                         usbtouch->y = 2 * begin_y + h;
 936                                         usbtouch->touch = packet->flags & 0x01;
 937                                         begin_y = end_y = -1;
 938                                         return 1;
 939                                 }
 940                         }
 941                         begin_x = end_x = -1;
 942                 }
 943
 944         }
 945         return 0;
 946 }
 947 #endif
 948
 949
 950 /*****************************************************************************
 951  * the different device descriptors
 952  */
 953 #ifdef MULTI_PACKET
 954 static void usbtouch_process_multi(struct usbtouch_usb *usbtouch,
 955                                    unsigned char *pkt, int len);
 956 #endif
 957
 958 static struct usbtouch_device_info usbtouch_dev_info[] = {
 959 #ifdef CONFIG_TOUCHSCREEN_USB_EGALAX
 960         [DEVTYPE_EGALAX] = {
 961                 .min_xc         = 0x0,
 962                 .max_xc         = 0x07ff,
 963                 .min_yc         = 0x0,
 964                 .max_yc         = 0x07ff,
 965                 .rept_size      = 16,
 966                 .process_pkt    = usbtouch_process_multi,
 967                 .get_pkt_len    = egalax_get_pkt_len,
 968                 .read_data      = egalax_read_data,
 969         },
 970 #endif
 971
 972 #ifdef CONFIG_TOUCHSCREEN_USB_PANJIT
 973         [DEVTYPE_PANJIT] = {
 974                 .min_xc         = 0x0,
 975                 .max_xc         = 0x0fff,
 976                 .min_yc         = 0x0,
 977                 .max_yc         = 0x0fff,
 978                 .rept_size      = 8,
 979                 .read_data      = panjit_read_data,
 980         },
 981 #endif
 982
 983 #ifdef CONFIG_TOUCHSCREEN_USB_3M
 984         [DEVTYPE_3M] = {
 985                 .min_xc         = 0x0,
 986                 .max_xc         = 0x4000,
 987                 .min_yc         = 0x0,
 988                 .max_yc         = 0x4000,
 989                 .rept_size      = 11,
 990                 .read_data      = mtouch_read_data,
 991                 .init           = mtouch_init,
 992         },
 993 #endif
 994
 995 #ifdef CONFIG_TOUCHSCREEN_USB_ITM
 996         [DEVTYPE_ITM] = {
 997                 .min_xc         = 0x0,
 998                 .max_xc         = 0x0fff,
 999                 .min_yc         = 0x0,
1000                 .max_yc         = 0x0fff,
1001                 .max_press      = 0xff,
1002                 .rept_size      = 8,
1003                 .read_data      = itm_read_data,
1004         },
1005 #endif
1006
1007 #ifdef CONFIG_TOUCHSCREEN_USB_ETURBO
1008         [DEVTYPE_ETURBO] = {
1009                 .min_xc         = 0x0,
1010                 .max_xc         = 0x07ff,
1011                 .min_yc         = 0x0,
1012                 .max_yc         = 0x07ff,
1013                 .rept_size      = 8,
1014                 .process_pkt    = usbtouch_process_multi,
1015                 .get_pkt_len    = eturbo_get_pkt_len,
1016                 .read_data      = eturbo_read_data,
1017         },
1018 #endif
1019
1020 #ifdef CONFIG_TOUCHSCREEN_USB_GUNZE
1021         [DEVTYPE_GUNZE] = {
1022                 .min_xc         = 0x0,
1023                 .max_xc         = 0x0fff,
1024                 .min_yc         = 0x0,
1025                 .max_yc         = 0x0fff,
1026                 .rept_size      = 4,
1027                 .read_data      = gunze_read_data,
1028         },
1029 #endif
1030
1031 #ifdef CONFIG_TOUCHSCREEN_USB_DMC_TSC10
1032         [DEVTYPE_DMC_TSC10] = {
1033                 .min_xc         = 0x0,
1034                 .max_xc         = 0x03ff,
1035                 .min_yc         = 0x0,
1036                 .max_yc         = 0x03ff,
1037                 .rept_size      = 5,
1038                 .init           = dmc_tsc10_init,
1039                 .read_data      = dmc_tsc10_read_data,
1040         },
1041 #endif
1042
1043 #ifdef CONFIG_TOUCHSCREEN_USB_IRTOUCH
1044         [DEVTYPE_IRTOUCH] = {
1045                 .min_xc         = 0x0,
1046                 .max_xc         = 0x0fff,
1047                 .min_yc         = 0x0,
1048                 .max_yc         = 0x0fff,
1049                 .rept_size      = 8,
1050                 .read_data      = irtouch_read_data,
1051         },
1052 #endif
1053
1054 #ifdef CONFIG_TOUCHSCREEN_USB_IDEALTEK
1055         [DEVTYPE_IDEALTEK] = {
1056                 .min_xc         = 0x0,
1057                 .max_xc         = 0x0fff,
1058                 .min_yc         = 0x0,
1059                 .max_yc         = 0x0fff,
1060                 .rept_size      = 8,
1061                 .process_pkt    = usbtouch_process_multi,
1062                 .get_pkt_len    = idealtek_get_pkt_len,
1063                 .read_data      = idealtek_read_data,
1064         },
1065 #endif
1066
1067 #ifdef CONFIG_TOUCHSCREEN_USB_GENERAL_TOUCH
1068         [DEVTYPE_GENERAL_TOUCH] = {
1069                 .min_xc         = 0x0,
1070                 .max_xc         = 0x7fff,
1071                 .min_yc         = 0x0,
1072                 .max_yc         = 0x7fff,
1073                 .rept_size      = 7,
1074                 .read_data      = general_touch_read_data,
1075         },
1076 #endif
1077
1078 #ifdef CONFIG_TOUCHSCREEN_USB_GOTOP
1079         [DEVTYPE_GOTOP] = {
1080                 .min_xc         = 0x0,
1081                 .max_xc         = 0x03ff,
1082                 .min_yc         = 0x0,
1083                 .max_yc         = 0x03ff,
1084                 .rept_size      = 4,
1085                 .read_data      = gotop_read_data,
1086         },
1087 #endif
1088
1089 #ifdef CONFIG_TOUCHSCREEN_USB_JASTEC
1090         [DEVTYPE_JASTEC] = {
1091                 .min_xc         = 0x0,
1092                 .max_xc         = 0x0fff,
1093                 .min_yc         = 0x0,
1094                 .max_yc         = 0x0fff,
1095                 .rept_size      = 4,
1096                 .read_data      = jastec_read_data,
1097         },
1098 #endif
1099
1100 #ifdef CONFIG_TOUCHSCREEN_USB_E2I
1101         [DEVTYPE_E2I] = {
1102                 .min_xc         = 0x0,
1103                 .max_xc         = 0x7fff,
1104                 .min_yc         = 0x0,
1105                 .max_yc         = 0x7fff,
1106                 .rept_size      = 6,
1107                 .init           = e2i_init,
1108                 .read_data      = e2i_read_data,
1109         },
1110 #endif
1111
1112 #ifdef CONFIG_TOUCHSCREEN_USB_ZYTRONIC
1113         [DEVTYPE_ZYTRONIC] = {
1114                 .min_xc         = 0x0,
1115                 .max_xc         = 0x03ff,
1116                 .min_yc         = 0x0,
1117                 .max_yc         = 0x03ff,
1118                 .rept_size      = 5,
1119                 .read_data      = zytronic_read_data,
1120                 .irq_always     = true,
1121         },
1122 #endif
1123
1124 #ifdef CONFIG_TOUCHSCREEN_USB_ETT_TC45USB
1125         [DEVTYPE_TC45USB] = {
1126                 .min_xc         = 0x0,
1127                 .max_xc         = 0x0fff,
1128                 .min_yc         = 0x0,
1129                 .max_yc         = 0x0fff,
1130                 .rept_size      = 5,
1131                 .read_data      = tc45usb_read_data,
1132         },
1133 #endif
1134
1135 #ifdef CONFIG_TOUCHSCREEN_USB_NEXIO
1136         [DEVTYPE_NEXIO] = {
1137                 .rept_size      = 1024,
1138                 .irq_always     = true,
1139                 .read_data      = nexio_read_data,
1140                 .alloc          = nexio_alloc,
1141                 .init           = nexio_init,
1142                 .exit           = nexio_exit,
1143         },
1144 #endif
1145 };
1146
1147
1148 /*****************************************************************************
1149  * Generic Part
1150  */
1151 static void usbtouch_process_pkt(struct usbtouch_usb *usbtouch,
1152                                  unsigned char *pkt, int len)
1153 {
1154         struct usbtouch_device_info *type = usbtouch->type;
1155
1156         if (!type->read_data(usbtouch, pkt))
1157                         return;
1158
1159         input_report_key(usbtouch->input, BTN_TOUCH, usbtouch->touch);
1160
1161         if (swap_xy) {
1162                 input_report_abs(usbtouch->input, ABS_X, usbtouch->y);
1163                 input_report_abs(usbtouch->input, ABS_Y, usbtouch->x);
1164         } else {
1165                 input_report_abs(usbtouch->input, ABS_X, usbtouch->x);
1166                 input_report_abs(usbtouch->input, ABS_Y, usbtouch->y);
1167         }
1168         if (type->max_press)
1169                 input_report_abs(usbtouch->input, ABS_PRESSURE, usbtouch->press);
1170         input_sync(usbtouch->input);
1171 }
1172
1173
1174 #ifdef MULTI_PACKET
1175 static void usbtouch_process_multi(struct usbtouch_usb *usbtouch,
1176                                    unsigned char *pkt, int len)
1177 {
1178         unsigned char *buffer;
1179         int pkt_len, pos, buf_len, tmp;
1180
1181         /* process buffer */
1182         if (unlikely(usbtouch->buf_len)) {
1183                 /* try to get size */
1184                 pkt_len = usbtouch->type->get_pkt_len(
1185                                 usbtouch->buffer, usbtouch->buf_len);
1186
1187                 /* drop? */
1188                 if (unlikely(!pkt_len))
1189                         goto out_flush_buf;
1190
1191                 /* need to append -pkt_len bytes before able to get size */
1192                 if (unlikely(pkt_len < 0)) {
1193                         int append = -pkt_len;
1194                         if (unlikely(append > len))
1195                                append = len;
1196                         if (usbtouch->buf_len + append >= usbtouch->type->rept_size)
1197                                 goto out_flush_buf;
1198                         memcpy(usbtouch->buffer + usbtouch->buf_len, pkt, append);
1199                         usbtouch->buf_len += append;
1200
1201                         pkt_len = usbtouch->type->get_pkt_len(
1202                                         usbtouch->buffer, usbtouch->buf_len);
1203                         if (pkt_len < 0)
1204                                 return;
1205                 }
1206
1207                 /* append */
1208                 tmp = pkt_len - usbtouch->buf_len;
1209                 if (usbtouch->buf_len + tmp >= usbtouch->type->rept_size)
1210                         goto out_flush_buf;
1211                 memcpy(usbtouch->buffer + usbtouch->buf_len, pkt, tmp);
1212                 usbtouch_process_pkt(usbtouch, usbtouch->buffer, pkt_len);
1213
1214                 buffer = pkt + tmp;
1215                 buf_len = len - tmp;
1216         } else {
1217                 buffer = pkt;
1218                 buf_len = len;
1219         }
1220
1221         /* loop over the received packet, process */
1222         pos = 0;
1223         while (pos < buf_len) {
1224                 /* get packet len */
1225                 pkt_len = usbtouch->type->get_pkt_len(buffer + pos,
1226                                                         buf_len - pos);
1227
1228                 /* unknown packet: skip one byte */
1229                 if (unlikely(!pkt_len)) {
1230                         pos++;
1231                         continue;
1232                 }
1233
1234                 /* full packet: process */
1235                 if (likely((pkt_len > 0) && (pkt_len <= buf_len - pos))) {
1236                         usbtouch_process_pkt(usbtouch, buffer + pos, pkt_len);
1237                 } else {
1238                         /* incomplete packet: save in buffer */
1239                         memcpy(usbtouch->buffer, buffer + pos, buf_len - pos);
1240                         usbtouch->buf_len = buf_len - pos;
1241                         return;
1242                 }
1243                 pos += pkt_len;
1244         }
1245
1246 out_flush_buf:
1247         usbtouch->buf_len = 0;
1248         return;
1249 }
1250 #endif
1251
1252
1253 static void usbtouch_irq(struct urb *urb)
1254 {
1255         struct usbtouch_usb *usbtouch = urb->context;
1256         int retval;
1257
1258         switch (urb->status) {
1259         case 0:
1260                 /* success */
1261                 break;
1262         case -ETIME:
1263                 /* this urb is timing out */
1264                 dbg("%s - urb timed out - was the device unplugged?",
1265                     __func__);
1266                 return;
1267         case -ECONNRESET:
1268         case -ENOENT:
1269         case -ESHUTDOWN:
1270         case -EPIPE:
1271                 /* this urb is terminated, clean up */
1272                 dbg("%s - urb shutting down with status: %d",
1273                     __func__, urb->status);
1274                 return;
1275         default:
1276                 dbg("%s - nonzero urb status received: %d",
1277                     __func__, urb->status);
1278                 goto exit;
1279         }
1280
1281         usbtouch->type->process_pkt(usbtouch, usbtouch->data, urb->actual_length);
1282
1283 exit:
1284         usb_mark_last_busy(interface_to_usbdev(usbtouch->interface));
1285         retval = usb_submit_urb(urb, GFP_ATOMIC);
1286         if (retval)
1287                 err("%s - usb_submit_urb failed with result: %d",
1288                     __func__, retval);
1289 }
1290
1291 static int usbtouch_open(struct input_dev *input)
1292 {
1293         struct usbtouch_usb *usbtouch = input_get_drvdata(input);
1294         int r;
1295
1296         usbtouch->irq->dev = interface_to_usbdev(usbtouch->interface);
1297
1298         r = usb_autopm_get_interface(usbtouch->interface) ? -EIO : 0;
1299         if (r < 0)
1300                 goto out;
1301
1302         if (!usbtouch->type->irq_always) {
1303                 if (usb_submit_urb(usbtouch->irq, GFP_KERNEL)) {
1304                         r = -EIO;
1305                         goto out_put;
1306                 }
1307         }
1308
1309         usbtouch->interface->needs_remote_wakeup = 1;
1310 out_put:
1311         usb_autopm_put_interface(usbtouch->interface);
1312 out:
1313         return r;
1314 }
1315
1316 static void usbtouch_close(struct input_dev *input)
1317 {
1318         struct usbtouch_usb *usbtouch = input_get_drvdata(input);
1319         int r;
1320
1321         if (!usbtouch->type->irq_always)
1322                 usb_kill_urb(usbtouch->irq);
1323         r = usb_autopm_get_interface(usbtouch->interface);
1324         usbtouch->interface->needs_remote_wakeup = 0;
1325         if (!r)
1326                 usb_autopm_put_interface(usbtouch->interface);
1327 }
1328
1329 static int usbtouch_suspend
1330 (struct usb_interface *intf, pm_message_t message)
1331 {
1332         struct usbtouch_usb *usbtouch = usb_get_intfdata(intf);
1333
1334         usb_kill_urb(usbtouch->irq);
1335
1336         return 0;
1337 }
1338
1339 static int usbtouch_resume(struct usb_interface *intf)
1340 {
1341         struct usbtouch_usb *usbtouch = usb_get_intfdata(intf);
1342         struct input_dev *input = usbtouch->input;
1343         int result = 0;
1344
1345         mutex_lock(&input->mutex);
1346         if (input->users || usbtouch->type->irq_always)
1347                 result = usb_submit_urb(usbtouch->irq, GFP_NOIO);
1348         mutex_unlock(&input->mutex);
1349
1350         return result;
1351 }
1352
1353 static int usbtouch_reset_resume(struct usb_interface *intf)
1354 {
1355         struct usbtouch_usb *usbtouch = usb_get_intfdata(intf);
1356         struct input_dev *input = usbtouch->input;
1357         int err = 0;
1358
1359         /* reinit the device */
1360         if (usbtouch->type->init) {
1361                 err = usbtouch->type->init(usbtouch);
1362                 if (err) {
1363                         dbg("%s - type->init() failed, err: %d",
1364                             __func__, err);
1365                         return err;
1366                 }
1367         }
1368
1369         /* restart IO if needed */
1370         mutex_lock(&input->mutex);
1371         if (input->users)
1372                 err = usb_submit_urb(usbtouch->irq, GFP_NOIO);
1373         mutex_unlock(&input->mutex);
1374
1375         return err;
1376 }
1377
1378 static void usbtouch_free_buffers(struct usb_device *udev,
1379                                   struct usbtouch_usb *usbtouch)
1380 {
1381         usb_free_coherent(udev, usbtouch->type->rept_size,
1382                           usbtouch->data, usbtouch->data_dma);
1383         kfree(usbtouch->buffer);
1384 }
1385
1386 static struct usb_endpoint_descriptor *
1387 usbtouch_get_input_endpoint(struct usb_host_interface *interface)
1388 {
1389         int i;
1390
1391         for (i = 0; i < interface->desc.bNumEndpoints; i++)
1392                 if (usb_endpoint_dir_in(&interface->endpoint[i].desc))
1393                         return &interface->endpoint[i].desc;
1394
1395         return NULL;
1396 }
1397
1398 static int usbtouch_probe(struct usb_interface *intf,
1399                           const struct usb_device_id *id)
1400 {
1401         struct usbtouch_usb *usbtouch;
1402         struct input_dev *input_dev;
1403         struct usb_endpoint_descriptor *endpoint;
1404         struct usb_device *udev = interface_to_usbdev(intf);
1405         struct usbtouch_device_info *type;
1406         int err = -ENOMEM;
1407
1408         /* some devices are ignored */
1409         if (id->driver_info == DEVTYPE_IGNORE)
1410                 return -ENODEV;
1411
1412         endpoint = usbtouch_get_input_endpoint(intf->cur_altsetting);
1413         if (!endpoint)
1414                 return -ENXIO;
1415
1416         usbtouch = kzalloc(sizeof(struct usbtouch_usb), GFP_KERNEL);
1417         input_dev = input_allocate_device();
1418         if (!usbtouch || !input_dev)
1419                 goto out_free;
1420
1421         type = &usbtouch_dev_info[id->driver_info];
1422         usbtouch->type = type;
1423         if (!type->process_pkt)
1424                 type->process_pkt = usbtouch_process_pkt;
1425
1426         usbtouch->data = usb_alloc_coherent(udev, type->rept_size,
1427                                             GFP_KERNEL, &usbtouch->data_dma);
1428         if (!usbtouch->data)
1429                 goto out_free;
1430
1431         if (type->get_pkt_len) {
1432                 usbtouch->buffer = kmalloc(type->rept_size, GFP_KERNEL);
1433                 if (!usbtouch->buffer)
1434                         goto out_free_buffers;
1435         }
1436
1437         usbtouch->irq = usb_alloc_urb(0, GFP_KERNEL);
1438         if (!usbtouch->irq) {
1439                 dbg("%s - usb_alloc_urb failed: usbtouch->irq", __func__);
1440                 goto out_free_buffers;
1441         }
1442
1443         usbtouch->interface = intf;
1444         usbtouch->input = input_dev;
1445
1446         if (udev->manufacturer)
1447                 strlcpy(usbtouch->name, udev->manufacturer, sizeof(usbtouch->name));
1448
1449         if (udev->product) {
1450                 if (udev->manufacturer)
1451                         strlcat(usbtouch->name, " ", sizeof(usbtouch->name));
1452                 strlcat(usbtouch->name, udev->product, sizeof(usbtouch->name));
1453         }
1454
1455         if (!strlen(usbtouch->name))
1456                 snprintf(usbtouch->name, sizeof(usbtouch->name),
1457                         "USB Touchscreen %04x:%04x",
1458                          le16_to_cpu(udev->descriptor.idVendor),
1459                          le16_to_cpu(udev->descriptor.idProduct));
1460
1461         usb_make_path(udev, usbtouch->phys, sizeof(usbtouch->phys));
1462         strlcat(usbtouch->phys, "/input0", sizeof(usbtouch->phys));
1463
1464         input_dev->name = usbtouch->name;
1465         input_dev->phys = usbtouch->phys;
1466         usb_to_input_id(udev, &input_dev->id);
1467         input_dev->dev.parent = &intf->dev;
1468
1469         input_set_drvdata(input_dev, usbtouch);
1470
1471         input_dev->open = usbtouch_open;
1472         input_dev->close = usbtouch_close;
1473
1474         input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
1475         input_dev->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH);
1476         input_set_abs_params(input_dev, ABS_X, type->min_xc, type->max_xc, 0, 0);
1477         input_set_abs_params(input_dev, ABS_Y, type->min_yc, type->max_yc, 0, 0);
1478         if (type->max_press)
1479                 input_set_abs_params(input_dev, ABS_PRESSURE, type->min_press,
1480                                      type->max_press, 0, 0);
1481
1482         if (usb_endpoint_type(endpoint) == USB_ENDPOINT_XFER_INT)
1483                 usb_fill_int_urb(usbtouch->irq, udev,
1484                          usb_rcvintpipe(udev, endpoint->bEndpointAddress),
1485                          usbtouch->data, type->rept_size,
1486                          usbtouch_irq, usbtouch, endpoint->bInterval);
1487         else
1488                 usb_fill_bulk_urb(usbtouch->irq, udev,
1489                          usb_rcvbulkpipe(udev, endpoint->bEndpointAddress),
1490                          usbtouch->data, type->rept_size,
1491                          usbtouch_irq, usbtouch);
1492
1493         usbtouch->irq->dev = udev;
1494         usbtouch->irq->transfer_dma = usbtouch->data_dma;
1495         usbtouch->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1496
1497         /* device specific allocations */
1498         if (type->alloc) {
1499                 err = type->alloc(usbtouch);
1500                 if (err) {
1501                         dbg("%s - type->alloc() failed, err: %d", __func__, err);
1502                         goto out_free_urb;
1503                 }
1504         }
1505
1506         /* device specific initialisation*/
1507         if (type->init) {
1508                 err = type->init(usbtouch);
1509                 if (err) {
1510                         dbg("%s - type->init() failed, err: %d", __func__, err);
1511                         goto out_do_exit;
1512                 }
1513         }
1514
1515         err = input_register_device(usbtouch->input);
1516         if (err) {
1517                 dbg("%s - input_register_device failed, err: %d", __func__, err);
1518                 goto out_do_exit;
1519         }
1520
1521         usb_set_intfdata(intf, usbtouch);
1522
1523         if (usbtouch->type->irq_always) {
1524                 /* this can't fail */
1525                 usb_autopm_get_interface(intf);
1526                 err = usb_submit_urb(usbtouch->irq, GFP_KERNEL);
1527                 if (err) {
1528                         usb_autopm_put_interface(intf);
1529                         err("%s - usb_submit_urb failed with result: %d",
1530                             __func__, err);
1531                         goto out_unregister_input;
1532                 }
1533         }
1534
1535         return 0;
1536
1537 out_unregister_input:
1538         input_unregister_device(input_dev);
1539         input_dev = NULL;
1540 out_do_exit:
1541         if (type->exit)
1542                 type->exit(usbtouch);
1543 out_free_urb:
1544         usb_free_urb(usbtouch->irq);
1545 out_free_buffers:
1546         usbtouch_free_buffers(udev, usbtouch);
1547 out_free:
1548         input_free_device(input_dev);
1549         kfree(usbtouch);
1550         return err;
1551 }
1552
1553 static void usbtouch_disconnect(struct usb_interface *intf)
1554 {
1555         struct usbtouch_usb *usbtouch = usb_get_intfdata(intf);
1556
1557         dbg("%s - called", __func__);
1558
1559         if (!usbtouch)
1560                 return;
1561
1562         dbg("%s - usbtouch is initialized, cleaning up", __func__);
1563         usb_set_intfdata(intf, NULL);
1564         /* this will stop IO via close */
1565         input_unregister_device(usbtouch->input);
1566         usb_free_urb(usbtouch->irq);
1567         if (usbtouch->type->exit)
1568                 usbtouch->type->exit(usbtouch);
1569         usbtouch_free_buffers(interface_to_usbdev(intf), usbtouch);
1570         kfree(usbtouch);
1571 }
1572
1573 MODULE_DEVICE_TABLE(usb, usbtouch_devices);
1574
1575 static struct usb_driver usbtouch_driver = {
1576         .name           = "usbtouchscreen",
1577         .probe          = usbtouch_probe,
1578         .disconnect     = usbtouch_disconnect,
1579         .suspend        = usbtouch_suspend,
1580         .resume         = usbtouch_resume,
1581         .reset_resume   = usbtouch_reset_resume,
1582         .id_table       = usbtouch_devices,
1583         .supports_autosuspend = 1,
1584 };
1585
1586 static int __init usbtouch_init(void)
1587 {
1588         return usb_register(&usbtouch_driver);
1589 }
1590
1591 static void __exit usbtouch_cleanup(void)
1592 {
1593         usb_deregister(&usbtouch_driver);
1594 }
1595
1596 module_init(usbtouch_init);
1597 module_exit(usbtouch_cleanup);
1598
1599 MODULE_AUTHOR(DRIVER_AUTHOR);
1600 MODULE_DESCRIPTION(DRIVER_DESC);
1601 MODULE_LICENSE("GPL");
1602
1603 MODULE_ALIAS("touchkitusb");
1604 MODULE_ALIAS("itmtouch");
1605 MODULE_ALIAS("mtouchusb");