Pileus Git - ~andy/linux/blob - drivers/input/touchscreen/usbtouchscreen.c

   1 /******************************************************************************
   2  * usbtouchscreen.c
   3  * Driver for USB Touchscreens, supporting those devices:
   4  *  - eGalax Touchkit
   5  *    includes eTurboTouch CT-410/510/700
   6  *  - 3M/Microtouch  EX II series
   7  *  - ITM
   8  *  - PanJit TouchSet
   9  *  - eTurboTouch
  10  *  - Gunze AHL61
  11  *  - DMC TSC-10/25
  12  *  - IRTOUCHSYSTEMS/UNITOP
  13  *  - IdealTEK URTC1000
  14  *  - General Touch
  15  *  - GoTop Super_Q2/GogoPen/PenPower tablets
  16  *  - JASTEC USB touch controller/DigiTech DTR-02U
  17  *  - Zytronic capacitive touchscreen
  18  *  - NEXIO/iNexio
  19  *  - Elo TouchSystems 2700 IntelliTouch
  20  *
  21  * Copyright (C) 2004-2007 by Daniel Ritz <daniel.ritz@gmx.ch>
  22  * Copyright (C) by Todd E. Johnson (mtouchusb.c)
  23  *
  24  * This program is free software; you can redistribute it and/or
  25  * modify it under the terms of the GNU General Public License as
  26  * published by the Free Software Foundation; either version 2 of the
  27  * License, or (at your option) any later version.
  28  *
  29  * This program is distributed in the hope that it will be useful, but
  30  * WITHOUT ANY WARRANTY; without even the implied warranty of
  31  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  32  * General Public License for more details.
  33  *
  34  * You should have received a copy of the GNU General Public License
  35  * along with this program; if not, write to the Free Software
  36  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  37  *
  38  * Driver is based on touchkitusb.c
  39  * - ITM parts are from itmtouch.c
  40  * - 3M parts are from mtouchusb.c
  41  * - PanJit parts are from an unmerged driver by Lanslott Gish
  42  * - DMC TSC 10/25 are from Holger Schurig, with ideas from an unmerged
  43  *   driver from Marius Vollmer
  44  *
  45  *****************************************************************************/
  46
  47 //#define DEBUG
  48
  49 #include <linux/kernel.h>
  50 #include <linux/slab.h>
  51 #include <linux/input.h>
  52 #include <linux/module.h>
  53 #include <linux/init.h>
  54 #include <linux/usb.h>
  55 #include <linux/usb/input.h>
  56 #include <linux/hid.h>
  57
  58
  59 #define DRIVER_VERSION          "v0.6"
  60 #define DRIVER_AUTHOR           "Daniel Ritz <daniel.ritz@gmx.ch>"
  61 #define DRIVER_DESC             "USB Touchscreen Driver"
  62
  63 static bool swap_xy;
  64 module_param(swap_xy, bool, 0644);
  65 MODULE_PARM_DESC(swap_xy, "If set X and Y axes are swapped.");
  66
  67 static bool hwcalib_xy;
  68 module_param(hwcalib_xy, bool, 0644);
  69 MODULE_PARM_DESC(hwcalib_xy, "If set hw-calibrated X/Y are used if available");
  70
  71 /* device specifc data/functions */
  72 struct usbtouch_usb;
  73 struct usbtouch_device_info {
  74         int min_xc, max_xc;
  75         int min_yc, max_yc;
  76         int min_press, max_press;
  77         int rept_size;
  78
  79         /*
  80          * Always service the USB devices irq not just when the input device is
  81          * open. This is useful when devices have a watchdog which prevents us
  82          * from periodically polling the device. Leave this unset unless your
  83          * touchscreen device requires it, as it does consume more of the USB
  84          * bandwidth.
  85          */
  86         bool irq_always;
  87
  88         void (*process_pkt) (struct usbtouch_usb *usbtouch, unsigned char *pkt, int len);
  89
  90         /*
  91          * used to get the packet len. possible return values:
  92          * > 0: packet len
  93          * = 0: skip one byte
  94          * < 0: -return value more bytes needed
  95          */
  96         int  (*get_pkt_len) (unsigned char *pkt, int len);
  97
  98         int  (*read_data)   (struct usbtouch_usb *usbtouch, unsigned char *pkt);
  99         int  (*alloc)       (struct usbtouch_usb *usbtouch);
 100         int  (*init)        (struct usbtouch_usb *usbtouch);
 101         void (*exit)        (struct usbtouch_usb *usbtouch);
 102 };
 103
 104 /* a usbtouch device */
 105 struct usbtouch_usb {
 106         unsigned char *data;
 107         dma_addr_t data_dma;
 108         unsigned char *buffer;
 109         int buf_len;
 110         struct urb *irq;
 111         struct usb_interface *interface;
 112         struct input_dev *input;
 113         struct usbtouch_device_info *type;
 114         char name[128];
 115         char phys[64];
 116         void *priv;
 117
 118         int x, y;
 119         int touch, press;
 120 };
 121
 122
 123 /* device types */
 124 enum {
 125         DEVTYPE_IGNORE = -1,
 126         DEVTYPE_EGALAX,
 127         DEVTYPE_PANJIT,
 128         DEVTYPE_3M,
 129         DEVTYPE_ITM,
 130         DEVTYPE_ETURBO,
 131         DEVTYPE_GUNZE,
 132         DEVTYPE_DMC_TSC10,
 133         DEVTYPE_IRTOUCH,
 134         DEVTYPE_IDEALTEK,
 135         DEVTYPE_GENERAL_TOUCH,
 136         DEVTYPE_GOTOP,
 137         DEVTYPE_JASTEC,
 138         DEVTYPE_E2I,
 139         DEVTYPE_ZYTRONIC,
 140         DEVTYPE_TC45USB,
 141         DEVTYPE_NEXIO,
 142         DEVTYPE_ELO,
 143 };
 144
 145 #define USB_DEVICE_HID_CLASS(vend, prod) \
 146         .match_flags = USB_DEVICE_ID_MATCH_INT_CLASS \
 147                 | USB_DEVICE_ID_MATCH_INT_PROTOCOL \
 148                 | USB_DEVICE_ID_MATCH_DEVICE, \
 149         .idVendor = (vend), \
 150         .idProduct = (prod), \
 151         .bInterfaceClass = USB_INTERFACE_CLASS_HID, \
 152         .bInterfaceProtocol = USB_INTERFACE_PROTOCOL_MOUSE
 153
 154 static const struct usb_device_id usbtouch_devices[] = {
 155 #ifdef CONFIG_TOUCHSCREEN_USB_EGALAX
 156         /* ignore the HID capable devices, handled by usbhid */
 157         {USB_DEVICE_HID_CLASS(0x0eef, 0x0001), .driver_info = DEVTYPE_IGNORE},
 158         {USB_DEVICE_HID_CLASS(0x0eef, 0x0002), .driver_info = DEVTYPE_IGNORE},
 159
 160         /* normal device IDs */
 161         {USB_DEVICE(0x3823, 0x0001), .driver_info = DEVTYPE_EGALAX},
 162         {USB_DEVICE(0x3823, 0x0002), .driver_info = DEVTYPE_EGALAX},
 163         {USB_DEVICE(0x0123, 0x0001), .driver_info = DEVTYPE_EGALAX},
 164         {USB_DEVICE(0x0eef, 0x0001), .driver_info = DEVTYPE_EGALAX},
 165         {USB_DEVICE(0x0eef, 0x0002), .driver_info = DEVTYPE_EGALAX},
 166         {USB_DEVICE(0x1234, 0x0001), .driver_info = DEVTYPE_EGALAX},
 167         {USB_DEVICE(0x1234, 0x0002), .driver_info = DEVTYPE_EGALAX},
 168 #endif
 169
 170 #ifdef CONFIG_TOUCHSCREEN_USB_PANJIT
 171         {USB_DEVICE(0x134c, 0x0001), .driver_info = DEVTYPE_PANJIT},
 172         {USB_DEVICE(0x134c, 0x0002), .driver_info = DEVTYPE_PANJIT},
 173         {USB_DEVICE(0x134c, 0x0003), .driver_info = DEVTYPE_PANJIT},
 174         {USB_DEVICE(0x134c, 0x0004), .driver_info = DEVTYPE_PANJIT},
 175 #endif
 176
 177 #ifdef CONFIG_TOUCHSCREEN_USB_3M
 178         {USB_DEVICE(0x0596, 0x0001), .driver_info = DEVTYPE_3M},
 179 #endif
 180
 181 #ifdef CONFIG_TOUCHSCREEN_USB_ITM
 182         {USB_DEVICE(0x0403, 0xf9e9), .driver_info = DEVTYPE_ITM},
 183         {USB_DEVICE(0x16e3, 0xf9e9), .driver_info = DEVTYPE_ITM},
 184 #endif
 185
 186 #ifdef CONFIG_TOUCHSCREEN_USB_ETURBO
 187         {USB_DEVICE(0x1234, 0x5678), .driver_info = DEVTYPE_ETURBO},
 188 #endif
 189
 190 #ifdef CONFIG_TOUCHSCREEN_USB_GUNZE
 191         {USB_DEVICE(0x0637, 0x0001), .driver_info = DEVTYPE_GUNZE},
 192 #endif
 193
 194 #ifdef CONFIG_TOUCHSCREEN_USB_DMC_TSC10
 195         {USB_DEVICE(0x0afa, 0x03e8), .driver_info = DEVTYPE_DMC_TSC10},
 196 #endif
 197
 198 #ifdef CONFIG_TOUCHSCREEN_USB_IRTOUCH
 199         {USB_DEVICE(0x595a, 0x0001), .driver_info = DEVTYPE_IRTOUCH},
 200         {USB_DEVICE(0x6615, 0x0001), .driver_info = DEVTYPE_IRTOUCH},
 201 #endif
 202
 203 #ifdef CONFIG_TOUCHSCREEN_USB_IDEALTEK
 204         {USB_DEVICE(0x1391, 0x1000), .driver_info = DEVTYPE_IDEALTEK},
 205 #endif
 206
 207 #ifdef CONFIG_TOUCHSCREEN_USB_GENERAL_TOUCH
 208         {USB_DEVICE(0x0dfc, 0x0001), .driver_info = DEVTYPE_GENERAL_TOUCH},
 209 #endif
 210
 211 #ifdef CONFIG_TOUCHSCREEN_USB_GOTOP
 212         {USB_DEVICE(0x08f2, 0x007f), .driver_info = DEVTYPE_GOTOP},
 213         {USB_DEVICE(0x08f2, 0x00ce), .driver_info = DEVTYPE_GOTOP},
 214         {USB_DEVICE(0x08f2, 0x00f4), .driver_info = DEVTYPE_GOTOP},
 215 #endif
 216
 217 #ifdef CONFIG_TOUCHSCREEN_USB_JASTEC
 218         {USB_DEVICE(0x0f92, 0x0001), .driver_info = DEVTYPE_JASTEC},
 219 #endif
 220
 221 #ifdef CONFIG_TOUCHSCREEN_USB_E2I
 222         {USB_DEVICE(0x1ac7, 0x0001), .driver_info = DEVTYPE_E2I},
 223 #endif
 224
 225 #ifdef CONFIG_TOUCHSCREEN_USB_ZYTRONIC
 226         {USB_DEVICE(0x14c8, 0x0003), .driver_info = DEVTYPE_ZYTRONIC},
 227 #endif
 228
 229 #ifdef CONFIG_TOUCHSCREEN_USB_ETT_TC45USB
 230         /* TC5UH */
 231         {USB_DEVICE(0x0664, 0x0309), .driver_info = DEVTYPE_TC45USB},
 232         /* TC4UM */
 233         {USB_DEVICE(0x0664, 0x0306), .driver_info = DEVTYPE_TC45USB},
 234 #endif
 235
 236 #ifdef CONFIG_TOUCHSCREEN_USB_NEXIO
 237         /* data interface only */
 238         {USB_DEVICE_AND_INTERFACE_INFO(0x10f0, 0x2002, 0x0a, 0x00, 0x00),
 239                 .driver_info = DEVTYPE_NEXIO},
 240         {USB_DEVICE_AND_INTERFACE_INFO(0x1870, 0x0001, 0x0a, 0x00, 0x00),
 241                 .driver_info = DEVTYPE_NEXIO},
 242 #endif
 243
 244 #ifdef CONFIG_TOUCHSCREEN_USB_ELO
 245         {USB_DEVICE(0x04e7, 0x0020), .driver_info = DEVTYPE_ELO},
 246 #endif
 247
 248         {}
 249 };
 250
 251
 252 /*****************************************************************************
 253  * e2i Part
 254  */
 255
 256 #ifdef CONFIG_TOUCHSCREEN_USB_E2I
 257 static int e2i_init(struct usbtouch_usb *usbtouch)
 258 {
 259         int ret;
 260         struct usb_device *udev = interface_to_usbdev(usbtouch->interface);
 261
 262         ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
 263                               0x01, 0x02, 0x0000, 0x0081,
 264                               NULL, 0, USB_CTRL_SET_TIMEOUT);
 265
 266         dbg("%s - usb_control_msg - E2I_RESET - bytes|err: %d",
 267             __func__, ret);
 268         return ret;
 269 }
 270
 271 static int e2i_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 272 {
 273         int tmp = (pkt[0] << 8) | pkt[1];
 274         dev->x  = (pkt[2] << 8) | pkt[3];
 275         dev->y  = (pkt[4] << 8) | pkt[5];
 276
 277         tmp = tmp - 0xA000;
 278         dev->touch = (tmp > 0);
 279         dev->press = (tmp > 0 ? tmp : 0);
 280
 281         return 1;
 282 }
 283 #endif
 284
 285
 286 /*****************************************************************************
 287  * eGalax part
 288  */
 289
 290 #ifdef CONFIG_TOUCHSCREEN_USB_EGALAX
 291
 292 #ifndef MULTI_PACKET
 293 #define MULTI_PACKET
 294 #endif
 295
 296 #define EGALAX_PKT_TYPE_MASK            0xFE
 297 #define EGALAX_PKT_TYPE_REPT            0x80
 298 #define EGALAX_PKT_TYPE_DIAG            0x0A
 299
 300 static int egalax_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 301 {
 302         if ((pkt[0] & EGALAX_PKT_TYPE_MASK) != EGALAX_PKT_TYPE_REPT)
 303                 return 0;
 304
 305         dev->x = ((pkt[3] & 0x0F) << 7) | (pkt[4] & 0x7F);
 306         dev->y = ((pkt[1] & 0x0F) << 7) | (pkt[2] & 0x7F);
 307         dev->touch = pkt[0] & 0x01;
 308
 309         return 1;
 310 }
 311
 312 static int egalax_get_pkt_len(unsigned char *buf, int len)
 313 {
 314         switch (buf[0] & EGALAX_PKT_TYPE_MASK) {
 315         case EGALAX_PKT_TYPE_REPT:
 316                 return 5;
 317
 318         case EGALAX_PKT_TYPE_DIAG:
 319                 if (len < 2)
 320                         return -1;
 321
 322                 return buf[1] + 2;
 323         }
 324
 325         return 0;
 326 }
 327 #endif
 328
 329
 330 /*****************************************************************************
 331  * PanJit Part
 332  */
 333 #ifdef CONFIG_TOUCHSCREEN_USB_PANJIT
 334 static int panjit_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 335 {
 336         dev->x = ((pkt[2] & 0x0F) << 8) | pkt[1];
 337         dev->y = ((pkt[4] & 0x0F) << 8) | pkt[3];
 338         dev->touch = pkt[0] & 0x01;
 339
 340         return 1;
 341 }
 342 #endif
 343
 344
 345 /*****************************************************************************
 346  * 3M/Microtouch Part
 347  */
 348 #ifdef CONFIG_TOUCHSCREEN_USB_3M
 349
 350 #define MTOUCHUSB_ASYNC_REPORT          1
 351 #define MTOUCHUSB_RESET                 7
 352 #define MTOUCHUSB_REQ_CTRLLR_ID         10
 353
 354 static int mtouch_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 355 {
 356         if (hwcalib_xy) {
 357                 dev->x = (pkt[4] << 8) | pkt[3];
 358                 dev->y = 0xffff - ((pkt[6] << 8) | pkt[5]);
 359         } else {
 360                 dev->x = (pkt[8] << 8) | pkt[7];
 361                 dev->y = (pkt[10] << 8) | pkt[9];
 362         }
 363         dev->touch = (pkt[2] & 0x40) ? 1 : 0;
 364
 365         return 1;
 366 }
 367
 368 static int mtouch_init(struct usbtouch_usb *usbtouch)
 369 {
 370         int ret, i;
 371         struct usb_device *udev = interface_to_usbdev(usbtouch->interface);
 372
 373         ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
 374                               MTOUCHUSB_RESET,
 375                               USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 376                               1, 0, NULL, 0, USB_CTRL_SET_TIMEOUT);
 377         dbg("%s - usb_control_msg - MTOUCHUSB_RESET - bytes|err: %d",
 378             __func__, ret);
 379         if (ret < 0)
 380                 return ret;
 381         msleep(150);
 382
 383         for (i = 0; i < 3; i++) {
 384                 ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
 385                                       MTOUCHUSB_ASYNC_REPORT,
 386                                       USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 387                                       1, 1, NULL, 0, USB_CTRL_SET_TIMEOUT);
 388                 dbg("%s - usb_control_msg - MTOUCHUSB_ASYNC_REPORT - bytes|err: %d",
 389                     __func__, ret);
 390                 if (ret >= 0)
 391                         break;
 392                 if (ret != -EPIPE)
 393                         return ret;
 394         }
 395
 396         /* Default min/max xy are the raw values, override if using hw-calib */
 397         if (hwcalib_xy) {
 398                 input_set_abs_params(usbtouch->input, ABS_X, 0, 0xffff, 0, 0);
 399                 input_set_abs_params(usbtouch->input, ABS_Y, 0, 0xffff, 0, 0);
 400         }
 401
 402         return 0;
 403 }
 404 #endif
 405
 406
 407 /*****************************************************************************
 408  * ITM Part
 409  */
 410 #ifdef CONFIG_TOUCHSCREEN_USB_ITM
 411 static int itm_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 412 {
 413         int touch;
 414         /*
 415          * ITM devices report invalid x/y data if not touched.
 416          * if the screen was touched before but is not touched any more
 417          * report touch as 0 with the last valid x/y data once. then stop
 418          * reporting data until touched again.
 419          */
 420         dev->press = ((pkt[2] & 0x01) << 7) | (pkt[5] & 0x7F);
 421
 422         touch = ~pkt[7] & 0x20;
 423         if (!touch) {
 424                 if (dev->touch) {
 425                         dev->touch = 0;
 426                         return 1;
 427                 }
 428
 429                 return 0;
 430         }
 431
 432         dev->x = ((pkt[0] & 0x1F) << 7) | (pkt[3] & 0x7F);
 433         dev->y = ((pkt[1] & 0x1F) << 7) | (pkt[4] & 0x7F);
 434         dev->touch = touch;
 435
 436         return 1;
 437 }
 438 #endif
 439
 440
 441 /*****************************************************************************
 442  * eTurboTouch part
 443  */
 444 #ifdef CONFIG_TOUCHSCREEN_USB_ETURBO
 445 #ifndef MULTI_PACKET
 446 #define MULTI_PACKET
 447 #endif
 448 static int eturbo_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 449 {
 450         unsigned int shift;
 451
 452         /* packets should start with sync */
 453         if (!(pkt[0] & 0x80))
 454                 return 0;
 455
 456         shift = (6 - (pkt[0] & 0x03));
 457         dev->x = ((pkt[3] << 7) | pkt[4]) >> shift;
 458         dev->y = ((pkt[1] << 7) | pkt[2]) >> shift;
 459         dev->touch = (pkt[0] & 0x10) ? 1 : 0;
 460
 461         return 1;
 462 }
 463
 464 static int eturbo_get_pkt_len(unsigned char *buf, int len)
 465 {
 466         if (buf[0] & 0x80)
 467                 return 5;
 468         if (buf[0] == 0x01)
 469                 return 3;
 470         return 0;
 471 }
 472 #endif
 473
 474
 475 /*****************************************************************************
 476  * Gunze part
 477  */
 478 #ifdef CONFIG_TOUCHSCREEN_USB_GUNZE
 479 static int gunze_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 480 {
 481         if (!(pkt[0] & 0x80) || ((pkt[1] | pkt[2] | pkt[3]) & 0x80))
 482                 return 0;
 483
 484         dev->x = ((pkt[0] & 0x1F) << 7) | (pkt[2] & 0x7F);
 485         dev->y = ((pkt[1] & 0x1F) << 7) | (pkt[3] & 0x7F);
 486         dev->touch = pkt[0] & 0x20;
 487
 488         return 1;
 489 }
 490 #endif
 491
 492 /*****************************************************************************
 493  * DMC TSC-10/25 Part
 494  *
 495  * Documentation about the controller and it's protocol can be found at
 496  *   http://www.dmccoltd.com/files/controler/tsc10usb_pi_e.pdf
 497  *   http://www.dmccoltd.com/files/controler/tsc25_usb_e.pdf
 498  */
 499 #ifdef CONFIG_TOUCHSCREEN_USB_DMC_TSC10
 500
 501 /* supported data rates. currently using 130 */
 502 #define TSC10_RATE_POINT        0x50
 503 #define TSC10_RATE_30           0x40
 504 #define TSC10_RATE_50           0x41
 505 #define TSC10_RATE_80           0x42
 506 #define TSC10_RATE_100          0x43
 507 #define TSC10_RATE_130          0x44
 508 #define TSC10_RATE_150          0x45
 509
 510 /* commands */
 511 #define TSC10_CMD_RESET         0x55
 512 #define TSC10_CMD_RATE          0x05
 513 #define TSC10_CMD_DATA1         0x01
 514
 515 static int dmc_tsc10_init(struct usbtouch_usb *usbtouch)
 516 {
 517         struct usb_device *dev = interface_to_usbdev(usbtouch->interface);
 518         int ret = -ENOMEM;
 519         unsigned char *buf;
 520
 521         buf = kmalloc(2, GFP_NOIO);
 522         if (!buf)
 523                 goto err_nobuf;
 524         /* reset */
 525         buf[0] = buf[1] = 0xFF;
 526         ret = usb_control_msg(dev, usb_rcvctrlpipe (dev, 0),
 527                               TSC10_CMD_RESET,
 528                               USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 529                               0, 0, buf, 2, USB_CTRL_SET_TIMEOUT);
 530         if (ret < 0)
 531                 goto err_out;
 532         if (buf[0] != 0x06) {
 533                 ret = -ENODEV;
 534                 goto err_out;
 535         }
 536
 537         /* set coordinate output rate */
 538         buf[0] = buf[1] = 0xFF;
 539         ret = usb_control_msg(dev, usb_rcvctrlpipe (dev, 0),
 540                               TSC10_CMD_RATE,
 541                               USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 542                               TSC10_RATE_150, 0, buf, 2, USB_CTRL_SET_TIMEOUT);
 543         if (ret < 0)
 544                 goto err_out;
 545         if ((buf[0] != 0x06) && (buf[0] != 0x15 || buf[1] != 0x01)) {
 546                 ret = -ENODEV;
 547                 goto err_out;
 548         }
 549
 550         /* start sending data */
 551         ret = usb_control_msg(dev, usb_rcvctrlpipe (dev, 0),
 552                               TSC10_CMD_DATA1,
 553                               USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 554                               0, 0, NULL, 0, USB_CTRL_SET_TIMEOUT);
 555 err_out:
 556         kfree(buf);
 557 err_nobuf:
 558         return ret;
 559 }
 560
 561
 562 static int dmc_tsc10_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 563 {
 564         dev->x = ((pkt[2] & 0x03) << 8) | pkt[1];
 565         dev->y = ((pkt[4] & 0x03) << 8) | pkt[3];
 566         dev->touch = pkt[0] & 0x01;
 567
 568         return 1;
 569 }
 570 #endif
 571
 572
 573 /*****************************************************************************
 574  * IRTOUCH Part
 575  */
 576 #ifdef CONFIG_TOUCHSCREEN_USB_IRTOUCH
 577 static int irtouch_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 578 {
 579         dev->x = (pkt[3] << 8) | pkt[2];
 580         dev->y = (pkt[5] << 8) | pkt[4];
 581         dev->touch = (pkt[1] & 0x03) ? 1 : 0;
 582
 583         return 1;
 584 }
 585 #endif
 586
 587 /*****************************************************************************
 588  * ET&T TC5UH/TC4UM part
 589  */
 590 #ifdef CONFIG_TOUCHSCREEN_USB_ETT_TC45USB
 591 static int tc45usb_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 592 {
 593         dev->x = ((pkt[2] & 0x0F) << 8) | pkt[1];
 594         dev->y = ((pkt[4] & 0x0F) << 8) | pkt[3];
 595         dev->touch = pkt[0] & 0x01;
 596
 597         return 1;
 598 }
 599 #endif
 600
 601 /*****************************************************************************
 602  * IdealTEK URTC1000 Part
 603  */
 604 #ifdef CONFIG_TOUCHSCREEN_USB_IDEALTEK
 605 #ifndef MULTI_PACKET
 606 #define MULTI_PACKET
 607 #endif
 608 static int idealtek_get_pkt_len(unsigned char *buf, int len)
 609 {
 610         if (buf[0] & 0x80)
 611                 return 5;
 612         if (buf[0] == 0x01)
 613                 return len;
 614         return 0;
 615 }
 616
 617 static int idealtek_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 618 {
 619         switch (pkt[0] & 0x98) {
 620         case 0x88:
 621                 /* touch data in IdealTEK mode */
 622                 dev->x = (pkt[1] << 5) | (pkt[2] >> 2);
 623                 dev->y = (pkt[3] << 5) | (pkt[4] >> 2);
 624                 dev->touch = (pkt[0] & 0x40) ? 1 : 0;
 625                 return 1;
 626
 627         case 0x98:
 628                 /* touch data in MT emulation mode */
 629                 dev->x = (pkt[2] << 5) | (pkt[1] >> 2);
 630                 dev->y = (pkt[4] << 5) | (pkt[3] >> 2);
 631                 dev->touch = (pkt[0] & 0x40) ? 1 : 0;
 632                 return 1;
 633
 634         default:
 635                 return 0;
 636         }
 637 }
 638 #endif
 639
 640 /*****************************************************************************
 641  * General Touch Part
 642  */
 643 #ifdef CONFIG_TOUCHSCREEN_USB_GENERAL_TOUCH
 644 static int general_touch_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 645 {
 646         dev->x = (pkt[2] << 8) | pkt[1];
 647         dev->y = (pkt[4] << 8) | pkt[3];
 648         dev->press = pkt[5] & 0xff;
 649         dev->touch = pkt[0] & 0x01;
 650
 651         return 1;
 652 }
 653 #endif
 654
 655 /*****************************************************************************
 656  * GoTop Part
 657  */
 658 #ifdef CONFIG_TOUCHSCREEN_USB_GOTOP
 659 static int gotop_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 660 {
 661         dev->x = ((pkt[1] & 0x38) << 4) | pkt[2];
 662         dev->y = ((pkt[1] & 0x07) << 7) | pkt[3];
 663         dev->touch = pkt[0] & 0x01;
 664
 665         return 1;
 666 }
 667 #endif
 668
 669 /*****************************************************************************
 670  * JASTEC Part
 671  */
 672 #ifdef CONFIG_TOUCHSCREEN_USB_JASTEC
 673 static int jastec_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 674 {
 675         dev->x = ((pkt[0] & 0x3f) << 6) | (pkt[2] & 0x3f);
 676         dev->y = ((pkt[1] & 0x3f) << 6) | (pkt[3] & 0x3f);
 677         dev->touch = (pkt[0] & 0x40) >> 6;
 678
 679         return 1;
 680 }
 681 #endif
 682
 683 /*****************************************************************************
 684  * Zytronic Part
 685  */
 686 #ifdef CONFIG_TOUCHSCREEN_USB_ZYTRONIC
 687 static int zytronic_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 688 {
 689         switch (pkt[0]) {
 690         case 0x3A: /* command response */
 691                 dbg("%s: Command response %d", __func__, pkt[1]);
 692                 break;
 693
 694         case 0xC0: /* down */
 695                 dev->x = (pkt[1] & 0x7f) | ((pkt[2] & 0x07) << 7);
 696                 dev->y = (pkt[3] & 0x7f) | ((pkt[4] & 0x07) << 7);
 697                 dev->touch = 1;
 698                 dbg("%s: down %d,%d", __func__, dev->x, dev->y);
 699                 return 1;
 700
 701         case 0x80: /* up */
 702                 dev->x = (pkt[1] & 0x7f) | ((pkt[2] & 0x07) << 7);
 703                 dev->y = (pkt[3] & 0x7f) | ((pkt[4] & 0x07) << 7);
 704                 dev->touch = 0;
 705                 dbg("%s: up %d,%d", __func__, dev->x, dev->y);
 706                 return 1;
 707
 708         default:
 709                 dbg("%s: Unknown return %d", __func__, pkt[0]);
 710                 break;
 711         }
 712
 713         return 0;
 714 }
 715 #endif
 716
 717 /*****************************************************************************
 718  * NEXIO Part
 719  */
 720 #ifdef CONFIG_TOUCHSCREEN_USB_NEXIO
 721
 722 #define NEXIO_TIMEOUT   5000
 723 #define NEXIO_BUFSIZE   1024
 724 #define NEXIO_THRESHOLD 50
 725
 726 struct nexio_priv {
 727         struct urb *ack;
 728         unsigned char *ack_buf;
 729 };
 730
 731 struct nexio_touch_packet {
 732         u8      flags;          /* 0xe1 = touch, 0xe1 = release */
 733         __be16  data_len;       /* total bytes of touch data */
 734         __be16  x_len;          /* bytes for X axis */
 735         __be16  y_len;          /* bytes for Y axis */
 736         u8      data[];
 737 } __attribute__ ((packed));
 738
 739 static unsigned char nexio_ack_pkt[2] = { 0xaa, 0x02 };
 740 static unsigned char nexio_init_pkt[4] = { 0x82, 0x04, 0x0a, 0x0f };
 741
 742 static void nexio_ack_complete(struct urb *urb)
 743 {
 744 }
 745
 746 static int nexio_alloc(struct usbtouch_usb *usbtouch)
 747 {
 748         struct nexio_priv *priv;
 749         int ret = -ENOMEM;
 750
 751         usbtouch->priv = kmalloc(sizeof(struct nexio_priv), GFP_KERNEL);
 752         if (!usbtouch->priv)
 753                 goto out_buf;
 754
 755         priv = usbtouch->priv;
 756
 757         priv->ack_buf = kmemdup(nexio_ack_pkt, sizeof(nexio_ack_pkt),
 758                                 GFP_KERNEL);
 759         if (!priv->ack_buf)
 760                 goto err_priv;
 761
 762         priv->ack = usb_alloc_urb(0, GFP_KERNEL);
 763         if (!priv->ack) {
 764                 dbg("%s - usb_alloc_urb failed: usbtouch->ack", __func__);
 765                 goto err_ack_buf;
 766         }
 767
 768         return 0;
 769
 770 err_ack_buf:
 771         kfree(priv->ack_buf);
 772 err_priv:
 773         kfree(priv);
 774 out_buf:
 775         return ret;
 776 }
 777
 778 static int nexio_init(struct usbtouch_usb *usbtouch)
 779 {
 780         struct usb_device *dev = interface_to_usbdev(usbtouch->interface);
 781         struct usb_host_interface *interface = usbtouch->interface->cur_altsetting;
 782         struct nexio_priv *priv = usbtouch->priv;
 783         int ret = -ENOMEM;
 784         int actual_len, i;
 785         unsigned char *buf;
 786         char *firmware_ver = NULL, *device_name = NULL;
 787         int input_ep = 0, output_ep = 0;
 788
 789         /* find first input and output endpoint */
 790         for (i = 0; i < interface->desc.bNumEndpoints; i++) {
 791                 if (!input_ep &&
 792                     usb_endpoint_dir_in(&interface->endpoint[i].desc))
 793                         input_ep = interface->endpoint[i].desc.bEndpointAddress;
 794                 if (!output_ep &&
 795                     usb_endpoint_dir_out(&interface->endpoint[i].desc))
 796                         output_ep = interface->endpoint[i].desc.bEndpointAddress;
 797         }
 798         if (!input_ep || !output_ep)
 799                 return -ENXIO;
 800
 801         buf = kmalloc(NEXIO_BUFSIZE, GFP_NOIO);
 802         if (!buf)
 803                 goto out_buf;
 804
 805         /* two empty reads */
 806         for (i = 0; i < 2; i++) {
 807                 ret = usb_bulk_msg(dev, usb_rcvbulkpipe(dev, input_ep),
 808                                    buf, NEXIO_BUFSIZE, &actual_len,
 809                                    NEXIO_TIMEOUT);
 810                 if (ret < 0)
 811                         goto out_buf;
 812         }
 813
 814         /* send init command */
 815         memcpy(buf, nexio_init_pkt, sizeof(nexio_init_pkt));
 816         ret = usb_bulk_msg(dev, usb_sndbulkpipe(dev, output_ep),
 817                            buf, sizeof(nexio_init_pkt), &actual_len,
 818                            NEXIO_TIMEOUT);
 819         if (ret < 0)
 820                 goto out_buf;
 821
 822         /* read replies */
 823         for (i = 0; i < 3; i++) {
 824                 memset(buf, 0, NEXIO_BUFSIZE);
 825                 ret = usb_bulk_msg(dev, usb_rcvbulkpipe(dev, input_ep),
 826                                    buf, NEXIO_BUFSIZE, &actual_len,
 827                                    NEXIO_TIMEOUT);
 828                 if (ret < 0 || actual_len < 1 || buf[1] != actual_len)
 829                         continue;
 830                 switch (buf[0]) {
 831                 case 0x83:      /* firmware version */
 832                         if (!firmware_ver)
 833                                 firmware_ver = kstrdup(&buf[2], GFP_NOIO);
 834                         break;
 835                 case 0x84:      /* device name */
 836                         if (!device_name)
 837                                 device_name = kstrdup(&buf[2], GFP_NOIO);
 838                         break;
 839                 }
 840         }
 841
 842         printk(KERN_INFO "Nexio device: %s, firmware version: %s\n",
 843                device_name, firmware_ver);
 844
 845         kfree(firmware_ver);
 846         kfree(device_name);
 847
 848         usb_fill_bulk_urb(priv->ack, dev, usb_sndbulkpipe(dev, output_ep),
 849                           priv->ack_buf, sizeof(nexio_ack_pkt),
 850                           nexio_ack_complete, usbtouch);
 851         ret = 0;
 852
 853 out_buf:
 854         kfree(buf);
 855         return ret;
 856 }
 857
 858 static void nexio_exit(struct usbtouch_usb *usbtouch)
 859 {
 860         struct nexio_priv *priv = usbtouch->priv;
 861
 862         usb_kill_urb(priv->ack);
 863         usb_free_urb(priv->ack);
 864         kfree(priv->ack_buf);
 865         kfree(priv);
 866 }
 867
 868 static int nexio_read_data(struct usbtouch_usb *usbtouch, unsigned char *pkt)
 869 {
 870         struct nexio_touch_packet *packet = (void *) pkt;
 871         struct nexio_priv *priv = usbtouch->priv;
 872         unsigned int data_len = be16_to_cpu(packet->data_len);
 873         unsigned int x_len = be16_to_cpu(packet->x_len);
 874         unsigned int y_len = be16_to_cpu(packet->y_len);
 875         int x, y, begin_x, begin_y, end_x, end_y, w, h, ret;
 876
 877         /* got touch data? */
 878         if ((pkt[0] & 0xe0) != 0xe0)
 879                 return 0;
 880
 881         if (data_len > 0xff)
 882                 data_len -= 0x100;
 883         if (x_len > 0xff)
 884                 x_len -= 0x80;
 885
 886         /* send ACK */
 887         ret = usb_submit_urb(priv->ack, GFP_ATOMIC);
 888
 889         if (!usbtouch->type->max_xc) {
 890                 usbtouch->type->max_xc = 2 * x_len;
 891                 input_set_abs_params(usbtouch->input, ABS_X,
 892                                      0, usbtouch->type->max_xc, 0, 0);
 893                 usbtouch->type->max_yc = 2 * y_len;
 894                 input_set_abs_params(usbtouch->input, ABS_Y,
 895                                      0, usbtouch->type->max_yc, 0, 0);
 896         }
 897         /*
 898          * The device reports state of IR sensors on X and Y axes.
 899          * Each byte represents "darkness" percentage (0-100) of one element.
 900          * 17" touchscreen reports only 64 x 52 bytes so the resolution is low.
 901          * This also means that there's a limited multi-touch capability but
 902          * it's disabled (and untested) here as there's no X driver for that.
 903          */
 904         begin_x = end_x = begin_y = end_y = -1;
 905         for (x = 0; x < x_len; x++) {
 906                 if (begin_x == -1 && packet->data[x] > NEXIO_THRESHOLD) {
 907                         begin_x = x;
 908                         continue;
 909                 }
 910                 if (end_x == -1 && begin_x != -1 && packet->data[x] < NEXIO_THRESHOLD) {
 911                         end_x = x - 1;
 912                         for (y = x_len; y < data_len; y++) {
 913                                 if (begin_y == -1 && packet->data[y] > NEXIO_THRESHOLD) {
 914                                         begin_y = y - x_len;
 915                                         continue;
 916                                 }
 917                                 if (end_y == -1 &&
 918                                     begin_y != -1 && packet->data[y] < NEXIO_THRESHOLD) {
 919                                         end_y = y - 1 - x_len;
 920                                         w = end_x - begin_x;
 921                                         h = end_y - begin_y;
 922 #if 0
 923                                         /* multi-touch */
 924                                         input_report_abs(usbtouch->input,
 925                                                     ABS_MT_TOUCH_MAJOR, max(w,h));
 926                                         input_report_abs(usbtouch->input,
 927                                                     ABS_MT_TOUCH_MINOR, min(x,h));
 928                                         input_report_abs(usbtouch->input,
 929                                                     ABS_MT_POSITION_X, 2*begin_x+w);
 930                                         input_report_abs(usbtouch->input,
 931                                                     ABS_MT_POSITION_Y, 2*begin_y+h);
 932                                         input_report_abs(usbtouch->input,
 933                                                     ABS_MT_ORIENTATION, w > h);
 934                                         input_mt_sync(usbtouch->input);
 935 #endif
 936                                         /* single touch */
 937                                         usbtouch->x = 2 * begin_x + w;
 938                                         usbtouch->y = 2 * begin_y + h;
 939                                         usbtouch->touch = packet->flags & 0x01;
 940                                         begin_y = end_y = -1;
 941                                         return 1;
 942                                 }
 943                         }
 944                         begin_x = end_x = -1;
 945                 }
 946
 947         }
 948         return 0;
 949 }
 950 #endif
 951
 952
 953 /*****************************************************************************
 954  * ELO part
 955  */
 956
 957 #ifdef CONFIG_TOUCHSCREEN_USB_ELO
 958
 959 static int elo_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 960 {
 961         dev->x = (pkt[3] << 8) | pkt[2];
 962         dev->y = (pkt[5] << 8) | pkt[4];
 963         dev->touch = pkt[6] > 0;
 964         dev->press = pkt[6];
 965
 966         return 1;
 967 }
 968 #endif
 969
 970
 971 /*****************************************************************************
 972  * the different device descriptors
 973  */
 974 #ifdef MULTI_PACKET
 975 static void usbtouch_process_multi(struct usbtouch_usb *usbtouch,
 976                                    unsigned char *pkt, int len);
 977 #endif
 978
 979 static struct usbtouch_device_info usbtouch_dev_info[] = {
 980 #ifdef CONFIG_TOUCHSCREEN_USB_ELO
 981         [DEVTYPE_ELO] = {
 982                 .min_xc         = 0x0,
 983                 .max_xc         = 0x0fff,
 984                 .min_yc         = 0x0,
 985                 .max_yc         = 0x0fff,
 986                 .max_press      = 0xff,
 987                 .rept_size      = 8,
 988                 .read_data      = elo_read_data,
 989         },
 990 #endif
 991
 992 #ifdef CONFIG_TOUCHSCREEN_USB_EGALAX
 993         [DEVTYPE_EGALAX] = {
 994                 .min_xc         = 0x0,
 995                 .max_xc         = 0x07ff,
 996                 .min_yc         = 0x0,
 997                 .max_yc         = 0x07ff,
 998                 .rept_size      = 16,
 999                 .process_pkt    = usbtouch_process_multi,
1000                 .get_pkt_len    = egalax_get_pkt_len,
1001                 .read_data      = egalax_read_data,
1002         },
1003 #endif
1004
1005 #ifdef CONFIG_TOUCHSCREEN_USB_PANJIT
1006         [DEVTYPE_PANJIT] = {
1007                 .min_xc         = 0x0,
1008                 .max_xc         = 0x0fff,
1009                 .min_yc         = 0x0,
1010                 .max_yc         = 0x0fff,
1011                 .rept_size      = 8,
1012                 .read_data      = panjit_read_data,
1013         },
1014 #endif
1015
1016 #ifdef CONFIG_TOUCHSCREEN_USB_3M
1017         [DEVTYPE_3M] = {
1018                 .min_xc         = 0x0,
1019                 .max_xc         = 0x4000,
1020                 .min_yc         = 0x0,
1021                 .max_yc         = 0x4000,
1022                 .rept_size      = 11,
1023                 .read_data      = mtouch_read_data,
1024                 .init           = mtouch_init,
1025         },
1026 #endif
1027
1028 #ifdef CONFIG_TOUCHSCREEN_USB_ITM
1029         [DEVTYPE_ITM] = {
1030                 .min_xc         = 0x0,
1031                 .max_xc         = 0x0fff,
1032                 .min_yc         = 0x0,
1033                 .max_yc         = 0x0fff,
1034                 .max_press      = 0xff,
1035                 .rept_size      = 8,
1036                 .read_data      = itm_read_data,
1037         },
1038 #endif
1039
1040 #ifdef CONFIG_TOUCHSCREEN_USB_ETURBO
1041         [DEVTYPE_ETURBO] = {
1042                 .min_xc         = 0x0,
1043                 .max_xc         = 0x07ff,
1044                 .min_yc         = 0x0,
1045                 .max_yc         = 0x07ff,
1046                 .rept_size      = 8,
1047                 .process_pkt    = usbtouch_process_multi,
1048                 .get_pkt_len    = eturbo_get_pkt_len,
1049                 .read_data      = eturbo_read_data,
1050         },
1051 #endif
1052
1053 #ifdef CONFIG_TOUCHSCREEN_USB_GUNZE
1054         [DEVTYPE_GUNZE] = {
1055                 .min_xc         = 0x0,
1056                 .max_xc         = 0x0fff,
1057                 .min_yc         = 0x0,
1058                 .max_yc         = 0x0fff,
1059                 .rept_size      = 4,
1060                 .read_data      = gunze_read_data,
1061         },
1062 #endif
1063
1064 #ifdef CONFIG_TOUCHSCREEN_USB_DMC_TSC10
1065         [DEVTYPE_DMC_TSC10] = {
1066                 .min_xc         = 0x0,
1067                 .max_xc         = 0x03ff,
1068                 .min_yc         = 0x0,
1069                 .max_yc         = 0x03ff,
1070                 .rept_size      = 5,
1071                 .init           = dmc_tsc10_init,
1072                 .read_data      = dmc_tsc10_read_data,
1073         },
1074 #endif
1075
1076 #ifdef CONFIG_TOUCHSCREEN_USB_IRTOUCH
1077         [DEVTYPE_IRTOUCH] = {
1078                 .min_xc         = 0x0,
1079                 .max_xc         = 0x0fff,
1080                 .min_yc         = 0x0,
1081                 .max_yc         = 0x0fff,
1082                 .rept_size      = 8,
1083                 .read_data      = irtouch_read_data,
1084         },
1085 #endif
1086
1087 #ifdef CONFIG_TOUCHSCREEN_USB_IDEALTEK
1088         [DEVTYPE_IDEALTEK] = {
1089                 .min_xc         = 0x0,
1090                 .max_xc         = 0x0fff,
1091                 .min_yc         = 0x0,
1092                 .max_yc         = 0x0fff,
1093                 .rept_size      = 8,
1094                 .process_pkt    = usbtouch_process_multi,
1095                 .get_pkt_len    = idealtek_get_pkt_len,
1096                 .read_data      = idealtek_read_data,
1097         },
1098 #endif
1099
1100 #ifdef CONFIG_TOUCHSCREEN_USB_GENERAL_TOUCH
1101         [DEVTYPE_GENERAL_TOUCH] = {
1102                 .min_xc         = 0x0,
1103                 .max_xc         = 0x7fff,
1104                 .min_yc         = 0x0,
1105                 .max_yc         = 0x7fff,
1106                 .rept_size      = 7,
1107                 .read_data      = general_touch_read_data,
1108         },
1109 #endif
1110
1111 #ifdef CONFIG_TOUCHSCREEN_USB_GOTOP
1112         [DEVTYPE_GOTOP] = {
1113                 .min_xc         = 0x0,
1114                 .max_xc         = 0x03ff,
1115                 .min_yc         = 0x0,
1116                 .max_yc         = 0x03ff,
1117                 .rept_size      = 4,
1118                 .read_data      = gotop_read_data,
1119         },
1120 #endif
1121
1122 #ifdef CONFIG_TOUCHSCREEN_USB_JASTEC
1123         [DEVTYPE_JASTEC] = {
1124                 .min_xc         = 0x0,
1125                 .max_xc         = 0x0fff,
1126                 .min_yc         = 0x0,
1127                 .max_yc         = 0x0fff,
1128                 .rept_size      = 4,
1129                 .read_data      = jastec_read_data,
1130         },
1131 #endif
1132
1133 #ifdef CONFIG_TOUCHSCREEN_USB_E2I
1134         [DEVTYPE_E2I] = {
1135                 .min_xc         = 0x0,
1136                 .max_xc         = 0x7fff,
1137                 .min_yc         = 0x0,
1138                 .max_yc         = 0x7fff,
1139                 .rept_size      = 6,
1140                 .init           = e2i_init,
1141                 .read_data      = e2i_read_data,
1142         },
1143 #endif
1144
1145 #ifdef CONFIG_TOUCHSCREEN_USB_ZYTRONIC
1146         [DEVTYPE_ZYTRONIC] = {
1147                 .min_xc         = 0x0,
1148                 .max_xc         = 0x03ff,
1149                 .min_yc         = 0x0,
1150                 .max_yc         = 0x03ff,
1151                 .rept_size      = 5,
1152                 .read_data      = zytronic_read_data,
1153                 .irq_always     = true,
1154         },
1155 #endif
1156
1157 #ifdef CONFIG_TOUCHSCREEN_USB_ETT_TC45USB
1158         [DEVTYPE_TC45USB] = {
1159                 .min_xc         = 0x0,
1160                 .max_xc         = 0x0fff,
1161                 .min_yc         = 0x0,
1162                 .max_yc         = 0x0fff,
1163                 .rept_size      = 5,
1164                 .read_data      = tc45usb_read_data,
1165         },
1166 #endif
1167
1168 #ifdef CONFIG_TOUCHSCREEN_USB_NEXIO
1169         [DEVTYPE_NEXIO] = {
1170                 .rept_size      = 1024,
1171                 .irq_always     = true,
1172                 .read_data      = nexio_read_data,
1173                 .alloc          = nexio_alloc,
1174                 .init           = nexio_init,
1175                 .exit           = nexio_exit,
1176         },
1177 #endif
1178 };
1179
1180
1181 /*****************************************************************************
1182  * Generic Part
1183  */
1184 static void usbtouch_process_pkt(struct usbtouch_usb *usbtouch,
1185                                  unsigned char *pkt, int len)
1186 {
1187         struct usbtouch_device_info *type = usbtouch->type;
1188
1189         if (!type->read_data(usbtouch, pkt))
1190                         return;
1191
1192         input_report_key(usbtouch->input, BTN_TOUCH, usbtouch->touch);
1193
1194         if (swap_xy) {
1195                 input_report_abs(usbtouch->input, ABS_X, usbtouch->y);
1196                 input_report_abs(usbtouch->input, ABS_Y, usbtouch->x);
1197         } else {
1198                 input_report_abs(usbtouch->input, ABS_X, usbtouch->x);
1199                 input_report_abs(usbtouch->input, ABS_Y, usbtouch->y);
1200         }
1201         if (type->max_press)
1202                 input_report_abs(usbtouch->input, ABS_PRESSURE, usbtouch->press);
1203         input_sync(usbtouch->input);
1204 }
1205
1206
1207 #ifdef MULTI_PACKET
1208 static void usbtouch_process_multi(struct usbtouch_usb *usbtouch,
1209                                    unsigned char *pkt, int len)
1210 {
1211         unsigned char *buffer;
1212         int pkt_len, pos, buf_len, tmp;
1213
1214         /* process buffer */
1215         if (unlikely(usbtouch->buf_len)) {
1216                 /* try to get size */
1217                 pkt_len = usbtouch->type->get_pkt_len(
1218                                 usbtouch->buffer, usbtouch->buf_len);
1219
1220                 /* drop? */
1221                 if (unlikely(!pkt_len))
1222                         goto out_flush_buf;
1223
1224                 /* need to append -pkt_len bytes before able to get size */
1225                 if (unlikely(pkt_len < 0)) {
1226                         int append = -pkt_len;
1227                         if (unlikely(append > len))
1228                                append = len;
1229                         if (usbtouch->buf_len + append >= usbtouch->type->rept_size)
1230                                 goto out_flush_buf;
1231                         memcpy(usbtouch->buffer + usbtouch->buf_len, pkt, append);
1232                         usbtouch->buf_len += append;
1233
1234                         pkt_len = usbtouch->type->get_pkt_len(
1235                                         usbtouch->buffer, usbtouch->buf_len);
1236                         if (pkt_len < 0)
1237                                 return;
1238                 }
1239
1240                 /* append */
1241                 tmp = pkt_len - usbtouch->buf_len;
1242                 if (usbtouch->buf_len + tmp >= usbtouch->type->rept_size)
1243                         goto out_flush_buf;
1244                 memcpy(usbtouch->buffer + usbtouch->buf_len, pkt, tmp);
1245                 usbtouch_process_pkt(usbtouch, usbtouch->buffer, pkt_len);
1246
1247                 buffer = pkt + tmp;
1248                 buf_len = len - tmp;
1249         } else {
1250                 buffer = pkt;
1251                 buf_len = len;
1252         }
1253
1254         /* loop over the received packet, process */
1255         pos = 0;
1256         while (pos < buf_len) {
1257                 /* get packet len */
1258                 pkt_len = usbtouch->type->get_pkt_len(buffer + pos,
1259                                                         buf_len - pos);
1260
1261                 /* unknown packet: skip one byte */
1262                 if (unlikely(!pkt_len)) {
1263                         pos++;
1264                         continue;
1265                 }
1266
1267                 /* full packet: process */
1268                 if (likely((pkt_len > 0) && (pkt_len <= buf_len - pos))) {
1269                         usbtouch_process_pkt(usbtouch, buffer + pos, pkt_len);
1270                 } else {
1271                         /* incomplete packet: save in buffer */
1272                         memcpy(usbtouch->buffer, buffer + pos, buf_len - pos);
1273                         usbtouch->buf_len = buf_len - pos;
1274                         return;
1275                 }
1276                 pos += pkt_len;
1277         }
1278
1279 out_flush_buf:
1280         usbtouch->buf_len = 0;
1281         return;
1282 }
1283 #endif
1284
1285
1286 static void usbtouch_irq(struct urb *urb)
1287 {
1288         struct usbtouch_usb *usbtouch = urb->context;
1289         int retval;
1290
1291         switch (urb->status) {
1292         case 0:
1293                 /* success */
1294                 break;
1295         case -ETIME:
1296                 /* this urb is timing out */
1297                 dbg("%s - urb timed out - was the device unplugged?",
1298                     __func__);
1299                 return;
1300         case -ECONNRESET:
1301         case -ENOENT:
1302         case -ESHUTDOWN:
1303         case -EPIPE:
1304                 /* this urb is terminated, clean up */
1305                 dbg("%s - urb shutting down with status: %d",
1306                     __func__, urb->status);
1307                 return;
1308         default:
1309                 dbg("%s - nonzero urb status received: %d",
1310                     __func__, urb->status);
1311                 goto exit;
1312         }
1313
1314         usbtouch->type->process_pkt(usbtouch, usbtouch->data, urb->actual_length);
1315
1316 exit:
1317         usb_mark_last_busy(interface_to_usbdev(usbtouch->interface));
1318         retval = usb_submit_urb(urb, GFP_ATOMIC);
1319         if (retval)
1320                 err("%s - usb_submit_urb failed with result: %d",
1321                     __func__, retval);
1322 }
1323
1324 static int usbtouch_open(struct input_dev *input)
1325 {
1326         struct usbtouch_usb *usbtouch = input_get_drvdata(input);
1327         int r;
1328
1329         usbtouch->irq->dev = interface_to_usbdev(usbtouch->interface);
1330
1331         r = usb_autopm_get_interface(usbtouch->interface) ? -EIO : 0;
1332         if (r < 0)
1333                 goto out;
1334
1335         if (!usbtouch->type->irq_always) {
1336                 if (usb_submit_urb(usbtouch->irq, GFP_KERNEL)) {
1337                         r = -EIO;
1338                         goto out_put;
1339                 }
1340         }
1341
1342         usbtouch->interface->needs_remote_wakeup = 1;
1343 out_put:
1344         usb_autopm_put_interface(usbtouch->interface);
1345 out:
1346         return r;
1347 }
1348
1349 static void usbtouch_close(struct input_dev *input)
1350 {
1351         struct usbtouch_usb *usbtouch = input_get_drvdata(input);
1352         int r;
1353
1354         if (!usbtouch->type->irq_always)
1355                 usb_kill_urb(usbtouch->irq);
1356         r = usb_autopm_get_interface(usbtouch->interface);
1357         usbtouch->interface->needs_remote_wakeup = 0;
1358         if (!r)
1359                 usb_autopm_put_interface(usbtouch->interface);
1360 }
1361
1362 static int usbtouch_suspend
1363 (struct usb_interface *intf, pm_message_t message)
1364 {
1365         struct usbtouch_usb *usbtouch = usb_get_intfdata(intf);
1366
1367         usb_kill_urb(usbtouch->irq);
1368
1369         return 0;
1370 }
1371
1372 static int usbtouch_resume(struct usb_interface *intf)
1373 {
1374         struct usbtouch_usb *usbtouch = usb_get_intfdata(intf);
1375         struct input_dev *input = usbtouch->input;
1376         int result = 0;
1377
1378         mutex_lock(&input->mutex);
1379         if (input->users || usbtouch->type->irq_always)
1380                 result = usb_submit_urb(usbtouch->irq, GFP_NOIO);
1381         mutex_unlock(&input->mutex);
1382
1383         return result;
1384 }
1385
1386 static int usbtouch_reset_resume(struct usb_interface *intf)
1387 {
1388         struct usbtouch_usb *usbtouch = usb_get_intfdata(intf);
1389         struct input_dev *input = usbtouch->input;
1390         int err = 0;
1391
1392         /* reinit the device */
1393         if (usbtouch->type->init) {
1394                 err = usbtouch->type->init(usbtouch);
1395                 if (err) {
1396                         dbg("%s - type->init() failed, err: %d",
1397                             __func__, err);
1398                         return err;
1399                 }
1400         }
1401
1402         /* restart IO if needed */
1403         mutex_lock(&input->mutex);
1404         if (input->users)
1405                 err = usb_submit_urb(usbtouch->irq, GFP_NOIO);
1406         mutex_unlock(&input->mutex);
1407
1408         return err;
1409 }
1410
1411 static void usbtouch_free_buffers(struct usb_device *udev,
1412                                   struct usbtouch_usb *usbtouch)
1413 {
1414         usb_free_coherent(udev, usbtouch->type->rept_size,
1415                           usbtouch->data, usbtouch->data_dma);
1416         kfree(usbtouch->buffer);
1417 }
1418
1419 static struct usb_endpoint_descriptor *
1420 usbtouch_get_input_endpoint(struct usb_host_interface *interface)
1421 {
1422         int i;
1423
1424         for (i = 0; i < interface->desc.bNumEndpoints; i++)
1425                 if (usb_endpoint_dir_in(&interface->endpoint[i].desc))
1426                         return &interface->endpoint[i].desc;
1427
1428         return NULL;
1429 }
1430
1431 static int usbtouch_probe(struct usb_interface *intf,
1432                           const struct usb_device_id *id)
1433 {
1434         struct usbtouch_usb *usbtouch;
1435         struct input_dev *input_dev;
1436         struct usb_endpoint_descriptor *endpoint;
1437         struct usb_device *udev = interface_to_usbdev(intf);
1438         struct usbtouch_device_info *type;
1439         int err = -ENOMEM;
1440
1441         /* some devices are ignored */
1442         if (id->driver_info == DEVTYPE_IGNORE)
1443                 return -ENODEV;
1444
1445         endpoint = usbtouch_get_input_endpoint(intf->cur_altsetting);
1446         if (!endpoint)
1447                 return -ENXIO;
1448
1449         usbtouch = kzalloc(sizeof(struct usbtouch_usb), GFP_KERNEL);
1450         input_dev = input_allocate_device();
1451         if (!usbtouch || !input_dev)
1452                 goto out_free;
1453
1454         type = &usbtouch_dev_info[id->driver_info];
1455         usbtouch->type = type;
1456         if (!type->process_pkt)
1457                 type->process_pkt = usbtouch_process_pkt;
1458
1459         usbtouch->data = usb_alloc_coherent(udev, type->rept_size,
1460                                             GFP_KERNEL, &usbtouch->data_dma);
1461         if (!usbtouch->data)
1462                 goto out_free;
1463
1464         if (type->get_pkt_len) {
1465                 usbtouch->buffer = kmalloc(type->rept_size, GFP_KERNEL);
1466                 if (!usbtouch->buffer)
1467                         goto out_free_buffers;
1468         }
1469
1470         usbtouch->irq = usb_alloc_urb(0, GFP_KERNEL);
1471         if (!usbtouch->irq) {
1472                 dbg("%s - usb_alloc_urb failed: usbtouch->irq", __func__);
1473                 goto out_free_buffers;
1474         }
1475
1476         usbtouch->interface = intf;
1477         usbtouch->input = input_dev;
1478
1479         if (udev->manufacturer)
1480                 strlcpy(usbtouch->name, udev->manufacturer, sizeof(usbtouch->name));
1481
1482         if (udev->product) {
1483                 if (udev->manufacturer)
1484                         strlcat(usbtouch->name, " ", sizeof(usbtouch->name));
1485                 strlcat(usbtouch->name, udev->product, sizeof(usbtouch->name));
1486         }
1487
1488         if (!strlen(usbtouch->name))
1489                 snprintf(usbtouch->name, sizeof(usbtouch->name),
1490                         "USB Touchscreen %04x:%04x",
1491                          le16_to_cpu(udev->descriptor.idVendor),
1492                          le16_to_cpu(udev->descriptor.idProduct));
1493
1494         usb_make_path(udev, usbtouch->phys, sizeof(usbtouch->phys));
1495         strlcat(usbtouch->phys, "/input0", sizeof(usbtouch->phys));
1496
1497         input_dev->name = usbtouch->name;
1498         input_dev->phys = usbtouch->phys;
1499         usb_to_input_id(udev, &input_dev->id);
1500         input_dev->dev.parent = &intf->dev;
1501
1502         input_set_drvdata(input_dev, usbtouch);
1503
1504         input_dev->open = usbtouch_open;
1505         input_dev->close = usbtouch_close;
1506
1507         input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
1508         input_dev->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH);
1509         input_set_abs_params(input_dev, ABS_X, type->min_xc, type->max_xc, 0, 0);
1510         input_set_abs_params(input_dev, ABS_Y, type->min_yc, type->max_yc, 0, 0);
1511         if (type->max_press)
1512                 input_set_abs_params(input_dev, ABS_PRESSURE, type->min_press,
1513                                      type->max_press, 0, 0);
1514
1515         if (usb_endpoint_type(endpoint) == USB_ENDPOINT_XFER_INT)
1516                 usb_fill_int_urb(usbtouch->irq, udev,
1517                          usb_rcvintpipe(udev, endpoint->bEndpointAddress),
1518                          usbtouch->data, type->rept_size,
1519                          usbtouch_irq, usbtouch, endpoint->bInterval);
1520         else
1521                 usb_fill_bulk_urb(usbtouch->irq, udev,
1522                          usb_rcvbulkpipe(udev, endpoint->bEndpointAddress),
1523                          usbtouch->data, type->rept_size,
1524                          usbtouch_irq, usbtouch);
1525
1526         usbtouch->irq->dev = udev;
1527         usbtouch->irq->transfer_dma = usbtouch->data_dma;
1528         usbtouch->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1529
1530         /* device specific allocations */
1531         if (type->alloc) {
1532                 err = type->alloc(usbtouch);
1533                 if (err) {
1534                         dbg("%s - type->alloc() failed, err: %d", __func__, err);
1535                         goto out_free_urb;
1536                 }
1537         }
1538
1539         /* device specific initialisation*/
1540         if (type->init) {
1541                 err = type->init(usbtouch);
1542                 if (err) {
1543                         dbg("%s - type->init() failed, err: %d", __func__, err);
1544                         goto out_do_exit;
1545                 }
1546         }
1547
1548         err = input_register_device(usbtouch->input);
1549         if (err) {
1550                 dbg("%s - input_register_device failed, err: %d", __func__, err);
1551                 goto out_do_exit;
1552         }
1553
1554         usb_set_intfdata(intf, usbtouch);
1555
1556         if (usbtouch->type->irq_always) {
1557                 /* this can't fail */
1558                 usb_autopm_get_interface(intf);
1559                 err = usb_submit_urb(usbtouch->irq, GFP_KERNEL);
1560                 if (err) {
1561                         usb_autopm_put_interface(intf);
1562                         err("%s - usb_submit_urb failed with result: %d",
1563                             __func__, err);
1564                         goto out_unregister_input;
1565                 }
1566         }
1567
1568         return 0;
1569
1570 out_unregister_input:
1571         input_unregister_device(input_dev);
1572         input_dev = NULL;
1573 out_do_exit:
1574         if (type->exit)
1575                 type->exit(usbtouch);
1576 out_free_urb:
1577         usb_free_urb(usbtouch->irq);
1578 out_free_buffers:
1579         usbtouch_free_buffers(udev, usbtouch);
1580 out_free:
1581         input_free_device(input_dev);
1582         kfree(usbtouch);
1583         return err;
1584 }
1585
1586 static void usbtouch_disconnect(struct usb_interface *intf)
1587 {
1588         struct usbtouch_usb *usbtouch = usb_get_intfdata(intf);
1589
1590         dbg("%s - called", __func__);
1591
1592         if (!usbtouch)
1593                 return;
1594
1595         dbg("%s - usbtouch is initialized, cleaning up", __func__);
1596         usb_set_intfdata(intf, NULL);
1597         /* this will stop IO via close */
1598         input_unregister_device(usbtouch->input);
1599         usb_free_urb(usbtouch->irq);
1600         if (usbtouch->type->exit)
1601                 usbtouch->type->exit(usbtouch);
1602         usbtouch_free_buffers(interface_to_usbdev(intf), usbtouch);
1603         kfree(usbtouch);
1604 }
1605
1606 MODULE_DEVICE_TABLE(usb, usbtouch_devices);
1607
1608 static struct usb_driver usbtouch_driver = {
1609         .name           = "usbtouchscreen",
1610         .probe          = usbtouch_probe,
1611         .disconnect     = usbtouch_disconnect,
1612         .suspend        = usbtouch_suspend,
1613         .resume         = usbtouch_resume,
1614         .reset_resume   = usbtouch_reset_resume,
1615         .id_table       = usbtouch_devices,
1616         .supports_autosuspend = 1,
1617 };
1618
1619 module_usb_driver(usbtouch_driver);
1620
1621 MODULE_AUTHOR(DRIVER_AUTHOR);
1622 MODULE_DESCRIPTION(DRIVER_DESC);
1623 MODULE_LICENSE("GPL");
1624
1625 MODULE_ALIAS("touchkitusb");
1626 MODULE_ALIAS("itmtouch");
1627 MODULE_ALIAS("mtouchusb");