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