drivers/input/touchscreen/usbtouchscreen.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /******************************************************************************
   3  * usbtouchscreen.c
   4  * Driver for USB Touchscreens, supporting those devices:
   5  *  - eGalax Touchkit
   6  *    includes eTurboTouch CT-410/510/700
   7  *  - 3M/Microtouch  EX II series
   8  *  - ITM
   9  *  - PanJit TouchSet
  10  *  - eTurboTouch
  11  *  - Gunze AHL61
  12  *  - DMC TSC-10/25
  13  *  - IRTOUCHSYSTEMS/UNITOP
  14  *  - IdealTEK URTC1000
  15  *  - General Touch
  16  *  - GoTop Super_Q2/GogoPen/PenPower tablets
  17  *  - JASTEC USB touch controller/DigiTech DTR-02U
  18  *  - Zytronic capacitive touchscreen
  19  *  - NEXIO/iNexio
  20  *  - Elo TouchSystems 2700 IntelliTouch
  21  *  - EasyTouch USB Dual/Multi touch controller from Data Modul
  22  *
  23  * Copyright (C) 2004-2007 by Daniel Ritz <daniel.ritz@gmx.ch>
  24  * Copyright (C) by Todd E. Johnson (mtouchusb.c)
  25  *
  26  * Driver is based on touchkitusb.c
  27  * - ITM parts are from itmtouch.c
  28  * - 3M parts are from mtouchusb.c
  29  * - PanJit parts are from an unmerged driver by Lanslott Gish
  30  * - DMC TSC 10/25 are from Holger Schurig, with ideas from an unmerged
  31  *   driver from Marius Vollmer
  32  *
  33  *****************************************************************************/
  34
  35 //#define DEBUG
  36
  37 #include <linux/kernel.h>
  38 #include <linux/slab.h>
  39 #include <linux/input.h>
  40 #include <linux/module.h>
  41 #include <linux/usb.h>
  42 #include <linux/usb/input.h>
  43 #include <linux/hid.h>
  44 #include <linux/mutex.h>
  45
  46 static bool swap_xy;
  47 module_param(swap_xy, bool, 0644);
  48 MODULE_PARM_DESC(swap_xy, "If set X and Y axes are swapped.");
  49
  50 static bool hwcalib_xy;
  51 module_param(hwcalib_xy, bool, 0644);
  52 MODULE_PARM_DESC(hwcalib_xy, "If set hw-calibrated X/Y are used if available");
  53
  54 /* device specifc data/functions */
  55 struct usbtouch_usb;
  56 struct usbtouch_device_info {
  57         int min_xc, max_xc;
  58         int min_yc, max_yc;
  59         int min_press, max_press;
  60         int rept_size;
  61
  62         /*
  63          * Always service the USB devices irq not just when the input device is
  64          * open. This is useful when devices have a watchdog which prevents us
  65          * from periodically polling the device. Leave this unset unless your
  66          * touchscreen device requires it, as it does consume more of the USB
  67          * bandwidth.
  68          */
  69         bool irq_always;
  70
  71         /*
  72          * used to get the packet len. possible return values:
  73          * > 0: packet len
  74          * = 0: skip one byte
  75          * < 0: -return value more bytes needed
  76          */
  77         int  (*get_pkt_len) (unsigned char *pkt, int len);
  78
  79         int  (*read_data)   (struct usbtouch_usb *usbtouch, unsigned char *pkt);
  80         int  (*alloc)       (struct usbtouch_usb *usbtouch);
  81         int  (*init)        (struct usbtouch_usb *usbtouch);
  82         void (*exit)        (struct usbtouch_usb *usbtouch);
  83 };
  84
  85 /* a usbtouch device */
  86 struct usbtouch_usb {
  87         unsigned char *data;
  88         dma_addr_t data_dma;
  89         int data_size;
  90         unsigned char *buffer;
  91         int buf_len;
  92         struct urb *irq;
  93         struct usb_interface *interface;
  94         struct input_dev *input;
  95         const struct usbtouch_device_info *type;
  96         struct mutex pm_mutex;  /* serialize access to open/suspend */
  97         bool is_open;
  98         char name[128];
  99         char phys[64];
 100         void *priv;
 101
 102         int x, y;
 103         int touch, press;
 104
 105         void (*process_pkt)(struct usbtouch_usb *usbtouch, unsigned char *pkt, int len);
 106 };
 107
 108
 109 /*****************************************************************************
 110  * e2i Part
 111  */
 112
 113 #ifdef CONFIG_TOUCHSCREEN_USB_E2I
 114 static int e2i_init(struct usbtouch_usb *usbtouch)
 115 {
 116         int ret;
 117         struct usb_device *udev = interface_to_usbdev(usbtouch->interface);
 118
 119         ret = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
 120                               0x01, 0x02, 0x0000, 0x0081,
 121                               NULL, 0, USB_CTRL_SET_TIMEOUT);
 122
 123         dev_dbg(&usbtouch->interface->dev,
 124                 "%s - usb_control_msg - E2I_RESET - bytes|err: %d\n",
 125                 __func__, ret);
 126         return ret;
 127 }
 128
 129 static int e2i_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 130 {
 131         int tmp = (pkt[0] << 8) | pkt[1];
 132         dev->x  = (pkt[2] << 8) | pkt[3];
 133         dev->y  = (pkt[4] << 8) | pkt[5];
 134
 135         tmp = tmp - 0xA000;
 136         dev->touch = (tmp > 0);
 137         dev->press = (tmp > 0 ? tmp : 0);
 138
 139         return 1;
 140 }
 141
 142 static const struct usbtouch_device_info e2i_dev_info = {
 143         .min_xc         = 0x0,
 144         .max_xc         = 0x7fff,
 145         .min_yc         = 0x0,
 146         .max_yc         = 0x7fff,
 147         .rept_size      = 6,
 148         .init           = e2i_init,
 149         .read_data      = e2i_read_data,
 150 };
 151 #endif
 152
 153
 154 /*****************************************************************************
 155  * eGalax part
 156  */
 157
 158 #ifdef CONFIG_TOUCHSCREEN_USB_EGALAX
 159
 160 #ifndef MULTI_PACKET
 161 #define MULTI_PACKET
 162 #endif
 163
 164 #define EGALAX_PKT_TYPE_MASK            0xFE
 165 #define EGALAX_PKT_TYPE_REPT            0x80
 166 #define EGALAX_PKT_TYPE_DIAG            0x0A
 167
 168 static int egalax_init(struct usbtouch_usb *usbtouch)
 169 {
 170         struct usb_device *udev = interface_to_usbdev(usbtouch->interface);
 171         int ret, i;
 172
 173         /*
 174          * An eGalax diagnostic packet kicks the device into using the right
 175          * protocol.  We send a "check active" packet.  The response will be
 176          * read later and ignored.
 177          */
 178
 179         u8 *buf __free(kfree) = kmalloc(3, GFP_KERNEL);
 180         if (!buf)
 181                 return -ENOMEM;
 182
 183         buf[0] = EGALAX_PKT_TYPE_DIAG;
 184         buf[1] = 1;     /* length */
 185         buf[2] = 'A';   /* command - check active */
 186
 187         for (i = 0; i < 3; i++) {
 188                 ret = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
 189                                       0,
 190                                       USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 191                                       0, 0, buf, 3,
 192                                       USB_CTRL_SET_TIMEOUT);
 193                 if (ret != -EPIPE)
 194                         break;
 195         }
 196
 197         return ret < 0 ? ret : 0;
 198 }
 199
 200 static int egalax_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 201 {
 202         if ((pkt[0] & EGALAX_PKT_TYPE_MASK) != EGALAX_PKT_TYPE_REPT)
 203                 return 0;
 204
 205         dev->x = ((pkt[3] & 0x0F) << 7) | (pkt[4] & 0x7F);
 206         dev->y = ((pkt[1] & 0x0F) << 7) | (pkt[2] & 0x7F);
 207         dev->touch = pkt[0] & 0x01;
 208
 209         return 1;
 210 }
 211
 212 static int egalax_get_pkt_len(unsigned char *buf, int len)
 213 {
 214         switch (buf[0] & EGALAX_PKT_TYPE_MASK) {
 215         case EGALAX_PKT_TYPE_REPT:
 216                 return 5;
 217
 218         case EGALAX_PKT_TYPE_DIAG:
 219                 if (len < 2)
 220                         return -1;
 221
 222                 return buf[1] + 2;
 223         }
 224
 225         return 0;
 226 }
 227
 228 static const struct usbtouch_device_info egalax_dev_info = {
 229         .min_xc         = 0x0,
 230         .max_xc         = 0x07ff,
 231         .min_yc         = 0x0,
 232         .max_yc         = 0x07ff,
 233         .rept_size      = 16,
 234         .get_pkt_len    = egalax_get_pkt_len,
 235         .read_data      = egalax_read_data,
 236         .init           = egalax_init,
 237 };
 238 #endif
 239
 240 /*****************************************************************************
 241  * EasyTouch part
 242  */
 243
 244 #ifdef CONFIG_TOUCHSCREEN_USB_EASYTOUCH
 245
 246 #ifndef MULTI_PACKET
 247 #define MULTI_PACKET
 248 #endif
 249
 250 #define ETOUCH_PKT_TYPE_MASK            0xFE
 251 #define ETOUCH_PKT_TYPE_REPT            0x80
 252 #define ETOUCH_PKT_TYPE_REPT2           0xB0
 253 #define ETOUCH_PKT_TYPE_DIAG            0x0A
 254
 255 static int etouch_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 256 {
 257         if ((pkt[0] & ETOUCH_PKT_TYPE_MASK) != ETOUCH_PKT_TYPE_REPT &&
 258                 (pkt[0] & ETOUCH_PKT_TYPE_MASK) != ETOUCH_PKT_TYPE_REPT2)
 259                 return 0;
 260
 261         dev->x = ((pkt[1] & 0x1F) << 7) | (pkt[2] & 0x7F);
 262         dev->y = ((pkt[3] & 0x1F) << 7) | (pkt[4] & 0x7F);
 263         dev->touch = pkt[0] & 0x01;
 264
 265         return 1;
 266 }
 267
 268 static int etouch_get_pkt_len(unsigned char *buf, int len)
 269 {
 270         switch (buf[0] & ETOUCH_PKT_TYPE_MASK) {
 271         case ETOUCH_PKT_TYPE_REPT:
 272         case ETOUCH_PKT_TYPE_REPT2:
 273                 return 5;
 274
 275         case ETOUCH_PKT_TYPE_DIAG:
 276                 if (len < 2)
 277                         return -1;
 278
 279                 return buf[1] + 2;
 280         }
 281
 282         return 0;
 283 }
 284
 285 static const struct usbtouch_device_info etouch_dev_info = {
 286         .min_xc         = 0x0,
 287         .max_xc         = 0x07ff,
 288         .min_yc         = 0x0,
 289         .max_yc         = 0x07ff,
 290         .rept_size      = 16,
 291         .get_pkt_len    = etouch_get_pkt_len,
 292         .read_data      = etouch_read_data,
 293 };
 294 #endif
 295
 296 /*****************************************************************************
 297  * PanJit Part
 298  */
 299 #ifdef CONFIG_TOUCHSCREEN_USB_PANJIT
 300 static int panjit_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 301 {
 302         dev->x = ((pkt[2] & 0x0F) << 8) | pkt[1];
 303         dev->y = ((pkt[4] & 0x0F) << 8) | pkt[3];
 304         dev->touch = pkt[0] & 0x01;
 305
 306         return 1;
 307 }
 308
 309 static const struct usbtouch_device_info panjit_dev_info = {
 310         .min_xc         = 0x0,
 311         .max_xc         = 0x0fff,
 312         .min_yc         = 0x0,
 313         .max_yc         = 0x0fff,
 314         .rept_size      = 8,
 315         .read_data      = panjit_read_data,
 316 };
 317 #endif
 318
 319
 320 /*****************************************************************************
 321  * 3M/Microtouch Part
 322  */
 323 #ifdef CONFIG_TOUCHSCREEN_USB_3M
 324
 325 #define MTOUCHUSB_ASYNC_REPORT          1
 326 #define MTOUCHUSB_RESET                 7
 327 #define MTOUCHUSB_REQ_CTRLLR_ID         10
 328
 329 #define MTOUCHUSB_REQ_CTRLLR_ID_LEN     16
 330
 331 static int mtouch_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 332 {
 333         if (hwcalib_xy) {
 334                 dev->x = (pkt[4] << 8) | pkt[3];
 335                 dev->y = 0xffff - ((pkt[6] << 8) | pkt[5]);
 336         } else {
 337                 dev->x = (pkt[8] << 8) | pkt[7];
 338                 dev->y = (pkt[10] << 8) | pkt[9];
 339         }
 340         dev->touch = (pkt[2] & 0x40) ? 1 : 0;
 341
 342         return 1;
 343 }
 344
 345 struct mtouch_priv {
 346         u8 fw_rev_major;
 347         u8 fw_rev_minor;
 348 };
 349
 350 static int mtouch_get_fw_revision(struct usbtouch_usb *usbtouch)
 351 {
 352         struct usb_device *udev = interface_to_usbdev(usbtouch->interface);
 353         struct mtouch_priv *priv = usbtouch->priv;
 354         int ret;
 355
 356         u8 *buf __free(kfree) = kzalloc(MTOUCHUSB_REQ_CTRLLR_ID_LEN, GFP_NOIO);
 357         if (!buf)
 358                 return -ENOMEM;
 359
 360         ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
 361                               MTOUCHUSB_REQ_CTRLLR_ID,
 362                               USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 363                               0, 0, buf, MTOUCHUSB_REQ_CTRLLR_ID_LEN,
 364                               USB_CTRL_SET_TIMEOUT);
 365         if (ret != MTOUCHUSB_REQ_CTRLLR_ID_LEN) {
 366                 dev_warn(&usbtouch->interface->dev,
 367                          "Failed to read FW rev: %d\n", ret);
 368                 return ret < 0 ? ret : -EIO;
 369         }
 370
 371         priv->fw_rev_major = buf[3];
 372         priv->fw_rev_minor = buf[4];
 373
 374         return 0;
 375 }
 376
 377 static int mtouch_alloc(struct usbtouch_usb *usbtouch)
 378 {
 379         struct mtouch_priv *priv;
 380
 381         priv = kmalloc(sizeof(*priv), GFP_KERNEL);
 382         if (!priv)
 383                 return -ENOMEM;
 384
 385         usbtouch->priv = priv;
 386         return 0;
 387 }
 388
 389 static int mtouch_init(struct usbtouch_usb *usbtouch)
 390 {
 391         int ret, i;
 392         struct usb_device *udev = interface_to_usbdev(usbtouch->interface);
 393
 394         ret = mtouch_get_fw_revision(usbtouch);
 395         if (ret)
 396                 return ret;
 397
 398         ret = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
 399                               MTOUCHUSB_RESET,
 400                               USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 401                               1, 0, NULL, 0, USB_CTRL_SET_TIMEOUT);
 402         dev_dbg(&usbtouch->interface->dev,
 403                 "%s - usb_control_msg - MTOUCHUSB_RESET - bytes|err: %d\n",
 404                 __func__, ret);
 405         if (ret < 0)
 406                 return ret;
 407         msleep(150);
 408
 409         for (i = 0; i < 3; i++) {
 410                 ret = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
 411                                       MTOUCHUSB_ASYNC_REPORT,
 412                                       USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 413                                       1, 1, NULL, 0, USB_CTRL_SET_TIMEOUT);
 414                 dev_dbg(&usbtouch->interface->dev,
 415                         "%s - usb_control_msg - MTOUCHUSB_ASYNC_REPORT - bytes|err: %d\n",
 416                         __func__, ret);
 417                 if (ret >= 0)
 418                         break;
 419                 if (ret != -EPIPE)
 420                         return ret;
 421         }
 422
 423         /* Default min/max xy are the raw values, override if using hw-calib */
 424         if (hwcalib_xy) {
 425                 input_set_abs_params(usbtouch->input, ABS_X, 0, 0xffff, 0, 0);
 426                 input_set_abs_params(usbtouch->input, ABS_Y, 0, 0xffff, 0, 0);
 427         }
 428
 429         return 0;
 430 }
 431
 432 static void mtouch_exit(struct usbtouch_usb *usbtouch)
 433 {
 434         struct mtouch_priv *priv = usbtouch->priv;
 435
 436         kfree(priv);
 437 }
 438
 439 static struct usbtouch_device_info mtouch_dev_info = {
 440         .min_xc         = 0x0,
 441         .max_xc         = 0x4000,
 442         .min_yc         = 0x0,
 443         .max_yc         = 0x4000,
 444         .rept_size      = 11,
 445         .read_data      = mtouch_read_data,
 446         .alloc          = mtouch_alloc,
 447         .init           = mtouch_init,
 448         .exit           = mtouch_exit,
 449 };
 450
 451 static ssize_t mtouch_firmware_rev_show(struct device *dev,
 452                                 struct device_attribute *attr, char *output)
 453 {
 454         struct usb_interface *intf = to_usb_interface(dev);
 455         struct usbtouch_usb *usbtouch = usb_get_intfdata(intf);
 456         struct mtouch_priv *priv = usbtouch->priv;
 457
 458         return sysfs_emit(output, "%1x.%1x\n",
 459                           priv->fw_rev_major, priv->fw_rev_minor);
 460 }
 461 static DEVICE_ATTR(firmware_rev, 0444, mtouch_firmware_rev_show, NULL);
 462
 463 static struct attribute *mtouch_attrs[] = {
 464         &dev_attr_firmware_rev.attr,
 465         NULL
 466 };
 467
 468 static bool mtouch_group_visible(struct kobject *kobj)
 469 {
 470         struct device *dev = kobj_to_dev(kobj);
 471         struct usb_interface *intf = to_usb_interface(dev);
 472         struct usbtouch_usb *usbtouch = usb_get_intfdata(intf);
 473
 474         return usbtouch->type == &mtouch_dev_info;
 475 }
 476
 477 DEFINE_SIMPLE_SYSFS_GROUP_VISIBLE(mtouch);
 478
 479 static const struct attribute_group mtouch_attr_group = {
 480         .is_visible = SYSFS_GROUP_VISIBLE(mtouch),
 481         .attrs = mtouch_attrs,
 482 };
 483 #endif
 484
 485
 486 /*****************************************************************************
 487  * ITM Part
 488  */
 489 #ifdef CONFIG_TOUCHSCREEN_USB_ITM
 490 static int itm_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 491 {
 492         int touch;
 493         /*
 494          * ITM devices report invalid x/y data if not touched.
 495          * if the screen was touched before but is not touched any more
 496          * report touch as 0 with the last valid x/y data once. then stop
 497          * reporting data until touched again.
 498          */
 499         dev->press = ((pkt[2] & 0x01) << 7) | (pkt[5] & 0x7F);
 500
 501         touch = ~pkt[7] & 0x20;
 502         if (!touch) {
 503                 if (dev->touch) {
 504                         dev->touch = 0;
 505                         return 1;
 506                 }
 507
 508                 return 0;
 509         }
 510
 511         dev->x = ((pkt[0] & 0x1F) << 7) | (pkt[3] & 0x7F);
 512         dev->y = ((pkt[1] & 0x1F) << 7) | (pkt[4] & 0x7F);
 513         dev->touch = touch;
 514
 515         return 1;
 516 }
 517
 518 static const struct usbtouch_device_info itm_dev_info = {
 519         .min_xc         = 0x0,
 520         .max_xc         = 0x0fff,
 521         .min_yc         = 0x0,
 522         .max_yc         = 0x0fff,
 523         .max_press      = 0xff,
 524         .rept_size      = 8,
 525         .read_data      = itm_read_data,
 526 };
 527 #endif
 528
 529
 530 /*****************************************************************************
 531  * eTurboTouch part
 532  */
 533 #ifdef CONFIG_TOUCHSCREEN_USB_ETURBO
 534 #ifndef MULTI_PACKET
 535 #define MULTI_PACKET
 536 #endif
 537 static int eturbo_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 538 {
 539         unsigned int shift;
 540
 541         /* packets should start with sync */
 542         if (!(pkt[0] & 0x80))
 543                 return 0;
 544
 545         shift = (6 - (pkt[0] & 0x03));
 546         dev->x = ((pkt[3] << 7) | pkt[4]) >> shift;
 547         dev->y = ((pkt[1] << 7) | pkt[2]) >> shift;
 548         dev->touch = (pkt[0] & 0x10) ? 1 : 0;
 549
 550         return 1;
 551 }
 552
 553 static int eturbo_get_pkt_len(unsigned char *buf, int len)
 554 {
 555         if (buf[0] & 0x80)
 556                 return 5;
 557         if (buf[0] == 0x01)
 558                 return 3;
 559         return 0;
 560 }
 561
 562 static const struct usbtouch_device_info eturbo_dev_info = {
 563         .min_xc         = 0x0,
 564         .max_xc         = 0x07ff,
 565         .min_yc         = 0x0,
 566         .max_yc         = 0x07ff,
 567         .rept_size      = 8,
 568         .get_pkt_len    = eturbo_get_pkt_len,
 569         .read_data      = eturbo_read_data,
 570 };
 571 #endif
 572
 573
 574 /*****************************************************************************
 575  * Gunze part
 576  */
 577 #ifdef CONFIG_TOUCHSCREEN_USB_GUNZE
 578 static int gunze_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 579 {
 580         if (!(pkt[0] & 0x80) || ((pkt[1] | pkt[2] | pkt[3]) & 0x80))
 581                 return 0;
 582
 583         dev->x = ((pkt[0] & 0x1F) << 7) | (pkt[2] & 0x7F);
 584         dev->y = ((pkt[1] & 0x1F) << 7) | (pkt[3] & 0x7F);
 585         dev->touch = pkt[0] & 0x20;
 586
 587         return 1;
 588 }
 589
 590 static const struct usbtouch_device_info gunze_dev_info = {
 591         .min_xc         = 0x0,
 592         .max_xc         = 0x0fff,
 593         .min_yc         = 0x0,
 594         .max_yc         = 0x0fff,
 595         .rept_size      = 4,
 596         .read_data      = gunze_read_data,
 597 };
 598 #endif
 599
 600 /*****************************************************************************
 601  * DMC TSC-10/25 Part
 602  *
 603  * Documentation about the controller and it's protocol can be found at
 604  *   http://www.dmccoltd.com/files/controler/tsc10usb_pi_e.pdf
 605  *   http://www.dmccoltd.com/files/controler/tsc25_usb_e.pdf
 606  */
 607 #ifdef CONFIG_TOUCHSCREEN_USB_DMC_TSC10
 608
 609 /* supported data rates. currently using 130 */
 610 #define TSC10_RATE_POINT        0x50
 611 #define TSC10_RATE_30           0x40
 612 #define TSC10_RATE_50           0x41
 613 #define TSC10_RATE_80           0x42
 614 #define TSC10_RATE_100          0x43
 615 #define TSC10_RATE_130          0x44
 616 #define TSC10_RATE_150          0x45
 617
 618 /* commands */
 619 #define TSC10_CMD_RESET         0x55
 620 #define TSC10_CMD_RATE          0x05
 621 #define TSC10_CMD_DATA1         0x01
 622
 623 static int dmc_tsc10_init(struct usbtouch_usb *usbtouch)
 624 {
 625         struct usb_device *dev = interface_to_usbdev(usbtouch->interface);
 626         int ret;
 627
 628         u8 *buf __free(kfree) = kmalloc(2, GFP_NOIO);
 629         if (!buf)
 630                 return -ENOMEM;
 631
 632         /* reset */
 633         buf[0] = buf[1] = 0xFF;
 634         ret = usb_control_msg(dev, usb_rcvctrlpipe (dev, 0),
 635                               TSC10_CMD_RESET,
 636                               USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 637                               0, 0, buf, 2, USB_CTRL_SET_TIMEOUT);
 638         if (ret < 0)
 639                 return ret;
 640
 641         if (buf[0] != 0x06)
 642                 return -ENODEV;
 643
 644         /* TSC-25 data sheet specifies a delay after the RESET command */
 645         msleep(150);
 646
 647         /* set coordinate output rate */
 648         buf[0] = buf[1] = 0xFF;
 649         ret = usb_control_msg(dev, usb_rcvctrlpipe (dev, 0),
 650                               TSC10_CMD_RATE,
 651                               USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 652                               TSC10_RATE_150, 0, buf, 2, USB_CTRL_SET_TIMEOUT);
 653         if (ret < 0)
 654                 return ret;
 655
 656         if (buf[0] != 0x06 && (buf[0] != 0x15 || buf[1] != 0x01))
 657                 return -ENODEV;
 658
 659         /* start sending data */
 660         return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
 661                                TSC10_CMD_DATA1,
 662                                USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 663                                0, 0, NULL, 0, USB_CTRL_SET_TIMEOUT);
 664 }
 665
 666 static int dmc_tsc10_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 667 {
 668         dev->x = ((pkt[2] & 0x03) << 8) | pkt[1];
 669         dev->y = ((pkt[4] & 0x03) << 8) | pkt[3];
 670         dev->touch = pkt[0] & 0x01;
 671
 672         return 1;
 673 }
 674
 675 static const struct usbtouch_device_info dmc_tsc10_dev_info = {
 676         .min_xc         = 0x0,
 677         .max_xc         = 0x03ff,
 678         .min_yc         = 0x0,
 679         .max_yc         = 0x03ff,
 680         .rept_size      = 5,
 681         .init           = dmc_tsc10_init,
 682         .read_data      = dmc_tsc10_read_data,
 683 };
 684 #endif
 685
 686
 687 /*****************************************************************************
 688  * IRTOUCH Part
 689  */
 690 #ifdef CONFIG_TOUCHSCREEN_USB_IRTOUCH
 691 static int irtouch_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 692 {
 693         dev->x = (pkt[3] << 8) | pkt[2];
 694         dev->y = (pkt[5] << 8) | pkt[4];
 695         dev->touch = (pkt[1] & 0x03) ? 1 : 0;
 696
 697         return 1;
 698 }
 699
 700 static const struct usbtouch_device_info irtouch_dev_info = {
 701         .min_xc         = 0x0,
 702         .max_xc         = 0x0fff,
 703         .min_yc         = 0x0,
 704         .max_yc         = 0x0fff,
 705         .rept_size      = 8,
 706         .read_data      = irtouch_read_data,
 707 };
 708
 709 static const struct usbtouch_device_info irtouch_hires_dev_info = {
 710         .min_xc         = 0x0,
 711         .max_xc         = 0x7fff,
 712         .min_yc         = 0x0,
 713         .max_yc         = 0x7fff,
 714         .rept_size      = 8,
 715         .read_data      = irtouch_read_data,
 716 };
 717 #endif
 718
 719 /*****************************************************************************
 720  * ET&T TC5UH/TC4UM part
 721  */
 722 #ifdef CONFIG_TOUCHSCREEN_USB_ETT_TC45USB
 723 static int tc45usb_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 724 {
 725         dev->x = ((pkt[2] & 0x0F) << 8) | pkt[1];
 726         dev->y = ((pkt[4] & 0x0F) << 8) | pkt[3];
 727         dev->touch = pkt[0] & 0x01;
 728
 729         return 1;
 730 }
 731
 732 static const struct usbtouch_device_info tc45usb_dev_info = {
 733         .min_xc         = 0x0,
 734         .max_xc         = 0x0fff,
 735         .min_yc         = 0x0,
 736         .max_yc         = 0x0fff,
 737         .rept_size      = 5,
 738         .read_data      = tc45usb_read_data,
 739 };
 740 #endif
 741
 742 /*****************************************************************************
 743  * IdealTEK URTC1000 Part
 744  */
 745 #ifdef CONFIG_TOUCHSCREEN_USB_IDEALTEK
 746 #ifndef MULTI_PACKET
 747 #define MULTI_PACKET
 748 #endif
 749 static int idealtek_get_pkt_len(unsigned char *buf, int len)
 750 {
 751         if (buf[0] & 0x80)
 752                 return 5;
 753         if (buf[0] == 0x01)
 754                 return len;
 755         return 0;
 756 }
 757
 758 static int idealtek_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 759 {
 760         switch (pkt[0] & 0x98) {
 761         case 0x88:
 762                 /* touch data in IdealTEK mode */
 763                 dev->x = (pkt[1] << 5) | (pkt[2] >> 2);
 764                 dev->y = (pkt[3] << 5) | (pkt[4] >> 2);
 765                 dev->touch = (pkt[0] & 0x40) ? 1 : 0;
 766                 return 1;
 767
 768         case 0x98:
 769                 /* touch data in MT emulation mode */
 770                 dev->x = (pkt[2] << 5) | (pkt[1] >> 2);
 771                 dev->y = (pkt[4] << 5) | (pkt[3] >> 2);
 772                 dev->touch = (pkt[0] & 0x40) ? 1 : 0;
 773                 return 1;
 774
 775         default:
 776                 return 0;
 777         }
 778 }
 779
 780 static const struct usbtouch_device_info idealtek_dev_info = {
 781         .min_xc         = 0x0,
 782         .max_xc         = 0x0fff,
 783         .min_yc         = 0x0,
 784         .max_yc         = 0x0fff,
 785         .rept_size      = 8,
 786         .get_pkt_len    = idealtek_get_pkt_len,
 787         .read_data      = idealtek_read_data,
 788 };
 789 #endif
 790
 791 /*****************************************************************************
 792  * General Touch Part
 793  */
 794 #ifdef CONFIG_TOUCHSCREEN_USB_GENERAL_TOUCH
 795 static int general_touch_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 796 {
 797         dev->x = (pkt[2] << 8) | pkt[1];
 798         dev->y = (pkt[4] << 8) | pkt[3];
 799         dev->press = pkt[5] & 0xff;
 800         dev->touch = pkt[0] & 0x01;
 801
 802         return 1;
 803 }
 804
 805 static const struct usbtouch_device_info general_touch_dev_info = {
 806         .min_xc         = 0x0,
 807         .max_xc         = 0x7fff,
 808         .min_yc         = 0x0,
 809         .max_yc         = 0x7fff,
 810         .rept_size      = 7,
 811         .read_data      = general_touch_read_data,
 812 };
 813 #endif
 814
 815 /*****************************************************************************
 816  * GoTop Part
 817  */
 818 #ifdef CONFIG_TOUCHSCREEN_USB_GOTOP
 819 static int gotop_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 820 {
 821         dev->x = ((pkt[1] & 0x38) << 4) | pkt[2];
 822         dev->y = ((pkt[1] & 0x07) << 7) | pkt[3];
 823         dev->touch = pkt[0] & 0x01;
 824
 825         return 1;
 826 }
 827
 828 static const struct usbtouch_device_info gotop_dev_info = {
 829         .min_xc         = 0x0,
 830         .max_xc         = 0x03ff,
 831         .min_yc         = 0x0,
 832         .max_yc         = 0x03ff,
 833         .rept_size      = 4,
 834         .read_data      = gotop_read_data,
 835 };
 836 #endif
 837
 838 /*****************************************************************************
 839  * JASTEC Part
 840  */
 841 #ifdef CONFIG_TOUCHSCREEN_USB_JASTEC
 842 static int jastec_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 843 {
 844         dev->x = ((pkt[0] & 0x3f) << 6) | (pkt[2] & 0x3f);
 845         dev->y = ((pkt[1] & 0x3f) << 6) | (pkt[3] & 0x3f);
 846         dev->touch = (pkt[0] & 0x40) >> 6;
 847
 848         return 1;
 849 }
 850
 851 static const struct usbtouch_device_info jastec_dev_info = {
 852         .min_xc         = 0x0,
 853         .max_xc         = 0x0fff,
 854         .min_yc         = 0x0,
 855         .max_yc         = 0x0fff,
 856         .rept_size      = 4,
 857         .read_data      = jastec_read_data,
 858 };
 859 #endif
 860
 861 /*****************************************************************************
 862  * Zytronic Part
 863  */
 864 #ifdef CONFIG_TOUCHSCREEN_USB_ZYTRONIC
 865 static int zytronic_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 866 {
 867         struct usb_interface *intf = dev->interface;
 868
 869         switch (pkt[0]) {
 870         case 0x3A: /* command response */
 871                 dev_dbg(&intf->dev, "%s: Command response %d\n", __func__, pkt[1]);
 872                 break;
 873
 874         case 0xC0: /* down */
 875                 dev->x = (pkt[1] & 0x7f) | ((pkt[2] & 0x07) << 7);
 876                 dev->y = (pkt[3] & 0x7f) | ((pkt[4] & 0x07) << 7);
 877                 dev->touch = 1;
 878                 dev_dbg(&intf->dev, "%s: down %d,%d\n", __func__, dev->x, dev->y);
 879                 return 1;
 880
 881         case 0x80: /* up */
 882                 dev->x = (pkt[1] & 0x7f) | ((pkt[2] & 0x07) << 7);
 883                 dev->y = (pkt[3] & 0x7f) | ((pkt[4] & 0x07) << 7);
 884                 dev->touch = 0;
 885                 dev_dbg(&intf->dev, "%s: up %d,%d\n", __func__, dev->x, dev->y);
 886                 return 1;
 887
 888         default:
 889                 dev_dbg(&intf->dev, "%s: Unknown return %d\n", __func__, pkt[0]);
 890                 break;
 891         }
 892
 893         return 0;
 894 }
 895
 896 static const struct usbtouch_device_info zytronic_dev_info = {
 897         .min_xc         = 0x0,
 898         .max_xc         = 0x03ff,
 899         .min_yc         = 0x0,
 900         .max_yc         = 0x03ff,
 901         .rept_size      = 5,
 902         .read_data      = zytronic_read_data,
 903         .irq_always     = true,
 904 };
 905 #endif
 906
 907 /*****************************************************************************
 908  * NEXIO Part
 909  */
 910 #ifdef CONFIG_TOUCHSCREEN_USB_NEXIO
 911
 912 #define NEXIO_TIMEOUT   5000
 913 #define NEXIO_BUFSIZE   1024
 914 #define NEXIO_THRESHOLD 50
 915
 916 struct nexio_priv {
 917         struct urb *ack;
 918         unsigned char *ack_buf;
 919 };
 920
 921 struct nexio_touch_packet {
 922         u8      flags;          /* 0xe1 = touch, 0xe1 = release */
 923         __be16  data_len;       /* total bytes of touch data */
 924         __be16  x_len;          /* bytes for X axis */
 925         __be16  y_len;          /* bytes for Y axis */
 926         u8      data[];
 927 } __attribute__ ((packed));
 928
 929 static unsigned char nexio_ack_pkt[2] = { 0xaa, 0x02 };
 930 static unsigned char nexio_init_pkt[4] = { 0x82, 0x04, 0x0a, 0x0f };
 931
 932 static void nexio_ack_complete(struct urb *urb)
 933 {
 934 }
 935
 936 static int nexio_alloc(struct usbtouch_usb *usbtouch)
 937 {
 938         struct nexio_priv *priv;
 939         int ret = -ENOMEM;
 940
 941         priv = kmalloc(sizeof(*priv), GFP_KERNEL);
 942         if (!priv)
 943                 goto out_buf;
 944
 945         usbtouch->priv = priv;
 946         priv->ack_buf = kmemdup(nexio_ack_pkt, sizeof(nexio_ack_pkt),
 947                                 GFP_KERNEL);
 948         if (!priv->ack_buf)
 949                 goto err_priv;
 950
 951         priv->ack = usb_alloc_urb(0, GFP_KERNEL);
 952         if (!priv->ack) {
 953                 dev_dbg(&usbtouch->interface->dev,
 954                         "%s - usb_alloc_urb failed: usbtouch->ack\n", __func__);
 955                 goto err_ack_buf;
 956         }
 957
 958         return 0;
 959
 960 err_ack_buf:
 961         kfree(priv->ack_buf);
 962 err_priv:
 963         kfree(priv);
 964 out_buf:
 965         return ret;
 966 }
 967
 968 static int nexio_init(struct usbtouch_usb *usbtouch)
 969 {
 970         struct usb_device *dev = interface_to_usbdev(usbtouch->interface);
 971         struct usb_host_interface *interface = usbtouch->interface->cur_altsetting;
 972         struct nexio_priv *priv = usbtouch->priv;
 973         int ret = -ENOMEM;
 974         int actual_len, i;
 975         char *firmware_ver = NULL, *device_name = NULL;
 976         int input_ep = 0, output_ep = 0;
 977
 978         /* find first input and output endpoint */
 979         for (i = 0; i < interface->desc.bNumEndpoints; i++) {
 980                 if (!input_ep &&
 981                     usb_endpoint_dir_in(&interface->endpoint[i].desc))
 982                         input_ep = interface->endpoint[i].desc.bEndpointAddress;
 983                 if (!output_ep &&
 984                     usb_endpoint_dir_out(&interface->endpoint[i].desc))
 985                         output_ep = interface->endpoint[i].desc.bEndpointAddress;
 986         }
 987         if (!input_ep || !output_ep)
 988                 return -ENXIO;
 989
 990         u8 *buf __free(kfree) = kmalloc(NEXIO_BUFSIZE, GFP_NOIO);
 991         if (!buf)
 992                 return -ENOMEM;
 993
 994         /* two empty reads */
 995         for (i = 0; i < 2; i++) {
 996                 ret = usb_bulk_msg(dev, usb_rcvbulkpipe(dev, input_ep),
 997                                    buf, NEXIO_BUFSIZE, &actual_len,
 998                                    NEXIO_TIMEOUT);
 999                 if (ret < 0)
1000                         return ret;
1001         }
1002
1003         /* send init command */
1004         memcpy(buf, nexio_init_pkt, sizeof(nexio_init_pkt));
1005         ret = usb_bulk_msg(dev, usb_sndbulkpipe(dev, output_ep),
1006                            buf, sizeof(nexio_init_pkt), &actual_len,
1007                            NEXIO_TIMEOUT);
1008         if (ret < 0)
1009                 return ret;
1010
1011         /* read replies */
1012         for (i = 0; i < 3; i++) {
1013                 memset(buf, 0, NEXIO_BUFSIZE);
1014                 ret = usb_bulk_msg(dev, usb_rcvbulkpipe(dev, input_ep),
1015                                    buf, NEXIO_BUFSIZE, &actual_len,
1016                                    NEXIO_TIMEOUT);
1017                 if (ret < 0 || actual_len < 1 || buf[1] != actual_len)
1018                         continue;
1019                 switch (buf[0]) {
1020                 case 0x83:      /* firmware version */
1021                         if (!firmware_ver)
1022                                 firmware_ver = kstrdup(&buf[2], GFP_NOIO);
1023                         break;
1024                 case 0x84:      /* device name */
1025                         if (!device_name)
1026                                 device_name = kstrdup(&buf[2], GFP_NOIO);
1027                         break;
1028                 }
1029         }
1030
1031         printk(KERN_INFO "Nexio device: %s, firmware version: %s\n",
1032                device_name, firmware_ver);
1033
1034         kfree(firmware_ver);
1035         kfree(device_name);
1036
1037         usb_fill_bulk_urb(priv->ack, dev, usb_sndbulkpipe(dev, output_ep),
1038                           priv->ack_buf, sizeof(nexio_ack_pkt),
1039                           nexio_ack_complete, usbtouch);
1040
1041         return 0;
1042 }
1043
1044 static void nexio_exit(struct usbtouch_usb *usbtouch)
1045 {
1046         struct nexio_priv *priv = usbtouch->priv;
1047
1048         usb_kill_urb(priv->ack);
1049         usb_free_urb(priv->ack);
1050         kfree(priv->ack_buf);
1051         kfree(priv);
1052 }
1053
1054 static int nexio_read_data(struct usbtouch_usb *usbtouch, unsigned char *pkt)
1055 {
1056         struct device *dev = &usbtouch->interface->dev;
1057         struct nexio_touch_packet *packet = (void *) pkt;
1058         struct nexio_priv *priv = usbtouch->priv;
1059         unsigned int data_len = be16_to_cpu(packet->data_len);
1060         unsigned int x_len = be16_to_cpu(packet->x_len);
1061         unsigned int y_len = be16_to_cpu(packet->y_len);
1062         int x, y, begin_x, begin_y, end_x, end_y, w, h, ret;
1063
1064         /* got touch data? */
1065         if ((pkt[0] & 0xe0) != 0xe0)
1066                 return 0;
1067
1068         if (data_len > 0xff)
1069                 data_len -= 0x100;
1070         if (x_len > 0xff)
1071                 x_len -= 0x80;
1072
1073         /* send ACK */
1074         ret = usb_submit_urb(priv->ack, GFP_ATOMIC);
1075         if (ret)
1076                 dev_warn(dev, "Failed to submit ACK URB: %d\n", ret);
1077
1078         if (!input_abs_get_max(usbtouch->input, ABS_X)) {
1079                 input_set_abs_params(usbtouch->input, ABS_X,
1080                                      0, 2 * x_len, 0, 0);
1081                 input_set_abs_params(usbtouch->input, ABS_Y,
1082                                      0, 2 * y_len, 0, 0);
1083         }
1084         /*
1085          * The device reports state of IR sensors on X and Y axes.
1086          * Each byte represents "darkness" percentage (0-100) of one element.
1087          * 17" touchscreen reports only 64 x 52 bytes so the resolution is low.
1088          * This also means that there's a limited multi-touch capability but
1089          * it's disabled (and untested) here as there's no X driver for that.
1090          */
1091         begin_x = end_x = begin_y = end_y = -1;
1092         for (x = 0; x < x_len; x++) {
1093                 if (begin_x == -1 && packet->data[x] > NEXIO_THRESHOLD) {
1094                         begin_x = x;
1095                         continue;
1096                 }
1097                 if (end_x == -1 && begin_x != -1 && packet->data[x] < NEXIO_THRESHOLD) {
1098                         end_x = x - 1;
1099                         for (y = x_len; y < data_len; y++) {
1100                                 if (begin_y == -1 && packet->data[y] > NEXIO_THRESHOLD) {
1101                                         begin_y = y - x_len;
1102                                         continue;
1103                                 }
1104                                 if (end_y == -1 &&
1105                                     begin_y != -1 && packet->data[y] < NEXIO_THRESHOLD) {
1106                                         end_y = y - 1 - x_len;
1107                                         w = end_x - begin_x;
1108                                         h = end_y - begin_y;
1109 #if 0
1110                                         /* multi-touch */
1111                                         input_report_abs(usbtouch->input,
1112                                                     ABS_MT_TOUCH_MAJOR, max(w,h));
1113                                         input_report_abs(usbtouch->input,
1114                                                     ABS_MT_TOUCH_MINOR, min(x,h));
1115                                         input_report_abs(usbtouch->input,
1116                                                     ABS_MT_POSITION_X, 2*begin_x+w);
1117                                         input_report_abs(usbtouch->input,
1118                                                     ABS_MT_POSITION_Y, 2*begin_y+h);
1119                                         input_report_abs(usbtouch->input,
1120                                                     ABS_MT_ORIENTATION, w > h);
1121                                         input_mt_sync(usbtouch->input);
1122 #endif
1123                                         /* single touch */
1124                                         usbtouch->x = 2 * begin_x + w;
1125                                         usbtouch->y = 2 * begin_y + h;
1126                                         usbtouch->touch = packet->flags & 0x01;
1127                                         begin_y = end_y = -1;
1128                                         return 1;
1129                                 }
1130                         }
1131                         begin_x = end_x = -1;
1132                 }
1133
1134         }
1135         return 0;
1136 }
1137
1138 static const struct usbtouch_device_info nexio_dev_info = {
1139         .rept_size      = 1024,
1140         .irq_always     = true,
1141         .read_data      = nexio_read_data,
1142         .alloc          = nexio_alloc,
1143         .init           = nexio_init,
1144         .exit           = nexio_exit,
1145 };
1146 #endif
1147
1148
1149 /*****************************************************************************
1150  * ELO part
1151  */
1152
1153 #ifdef CONFIG_TOUCHSCREEN_USB_ELO
1154
1155 static int elo_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
1156 {
1157         dev->x = (pkt[3] << 8) | pkt[2];
1158         dev->y = (pkt[5] << 8) | pkt[4];
1159         dev->touch = pkt[6] > 0;
1160         dev->press = pkt[6];
1161
1162         return 1;
1163 }
1164
1165 static const struct usbtouch_device_info elo_dev_info = {
1166         .min_xc         = 0x0,
1167         .max_xc         = 0x0fff,
1168         .min_yc         = 0x0,
1169         .max_yc         = 0x0fff,
1170         .max_press      = 0xff,
1171         .rept_size      = 8,
1172         .read_data      = elo_read_data,
1173 };
1174 #endif
1175
1176
1177 /*****************************************************************************
1178  * Generic Part
1179  */
1180 static void usbtouch_process_pkt(struct usbtouch_usb *usbtouch,
1181                                  unsigned char *pkt, int len)
1182 {
1183         const struct usbtouch_device_info *type = usbtouch->type;
1184
1185         if (!type->read_data(usbtouch, pkt))
1186                 return;
1187
1188         input_report_key(usbtouch->input, BTN_TOUCH, usbtouch->touch);
1189
1190         if (swap_xy) {
1191                 input_report_abs(usbtouch->input, ABS_X, usbtouch->y);
1192                 input_report_abs(usbtouch->input, ABS_Y, usbtouch->x);
1193         } else {
1194                 input_report_abs(usbtouch->input, ABS_X, usbtouch->x);
1195                 input_report_abs(usbtouch->input, ABS_Y, usbtouch->y);
1196         }
1197         if (type->max_press)
1198                 input_report_abs(usbtouch->input, ABS_PRESSURE, usbtouch->press);
1199         input_sync(usbtouch->input);
1200 }
1201
1202
1203 #ifdef MULTI_PACKET
1204 static void usbtouch_process_multi(struct usbtouch_usb *usbtouch,
1205                                    unsigned char *pkt, int len)
1206 {
1207         unsigned char *buffer;
1208         int pkt_len, pos, buf_len, tmp;
1209
1210         /* process buffer */
1211         if (unlikely(usbtouch->buf_len)) {
1212                 /* try to get size */
1213                 pkt_len = usbtouch->type->get_pkt_len(
1214                                 usbtouch->buffer, usbtouch->buf_len);
1215
1216                 /* drop? */
1217                 if (unlikely(!pkt_len))
1218                         goto out_flush_buf;
1219
1220                 /* need to append -pkt_len bytes before able to get size */
1221                 if (unlikely(pkt_len < 0)) {
1222                         int append = -pkt_len;
1223                         if (unlikely(append > len))
1224                                append = len;
1225                         if (usbtouch->buf_len + append >= usbtouch->type->rept_size)
1226                                 goto out_flush_buf;
1227                         memcpy(usbtouch->buffer + usbtouch->buf_len, pkt, append);
1228                         usbtouch->buf_len += append;
1229
1230                         pkt_len = usbtouch->type->get_pkt_len(
1231                                         usbtouch->buffer, usbtouch->buf_len);
1232                         if (pkt_len < 0)
1233                                 return;
1234                 }
1235
1236                 /* append */
1237                 tmp = pkt_len - usbtouch->buf_len;
1238                 if (usbtouch->buf_len + tmp >= usbtouch->type->rept_size)
1239                         goto out_flush_buf;
1240                 memcpy(usbtouch->buffer + usbtouch->buf_len, pkt, tmp);
1241                 usbtouch_process_pkt(usbtouch, usbtouch->buffer, pkt_len);
1242
1243                 buffer = pkt + tmp;
1244                 buf_len = len - tmp;
1245         } else {
1246                 buffer = pkt;
1247                 buf_len = len;
1248         }
1249
1250         /* loop over the received packet, process */
1251         pos = 0;
1252         while (pos < buf_len) {
1253                 /* get packet len */
1254                 pkt_len = usbtouch->type->get_pkt_len(buffer + pos,
1255                                                         buf_len - pos);
1256
1257                 /* unknown packet: skip one byte */
1258                 if (unlikely(!pkt_len)) {
1259                         pos++;
1260                         continue;
1261                 }
1262
1263                 /* full packet: process */
1264                 if (likely((pkt_len > 0) && (pkt_len <= buf_len - pos))) {
1265                         usbtouch_process_pkt(usbtouch, buffer + pos, pkt_len);
1266                 } else {
1267                         /* incomplete packet: save in buffer */
1268                         memcpy(usbtouch->buffer, buffer + pos, buf_len - pos);
1269                         usbtouch->buf_len = buf_len - pos;
1270                         return;
1271                 }
1272                 pos += pkt_len;
1273         }
1274
1275 out_flush_buf:
1276         usbtouch->buf_len = 0;
1277         return;
1278 }
1279 #else
1280 static void usbtouch_process_multi(struct usbtouch_usb *usbtouch,
1281                                    unsigned char *pkt, int len)
1282 {
1283         dev_WARN_ONCE(&usbtouch->interface->dev, 1,
1284                       "Protocol has ->get_pkt_len() without #define MULTI_PACKET");
1285 }
1286 #endif
1287
1288 static void usbtouch_irq(struct urb *urb)
1289 {
1290         struct usbtouch_usb *usbtouch = urb->context;
1291         struct device *dev = &usbtouch->interface->dev;
1292         int retval;
1293
1294         switch (urb->status) {
1295         case 0:
1296                 /* success */
1297                 break;
1298         case -ETIME:
1299                 /* this urb is timing out */
1300                 dev_dbg(dev,
1301                         "%s - urb timed out - was the device unplugged?\n",
1302                         __func__);
1303                 return;
1304         case -ECONNRESET:
1305         case -ENOENT:
1306         case -ESHUTDOWN:
1307         case -EPIPE:
1308                 /* this urb is terminated, clean up */
1309                 dev_dbg(dev, "%s - urb shutting down with status: %d\n",
1310                         __func__, urb->status);
1311                 return;
1312         default:
1313                 dev_dbg(dev, "%s - nonzero urb status received: %d\n",
1314                         __func__, urb->status);
1315                 goto exit;
1316         }
1317
1318         usbtouch->process_pkt(usbtouch, usbtouch->data, urb->actual_length);
1319
1320 exit:
1321         usb_mark_last_busy(interface_to_usbdev(usbtouch->interface));
1322         retval = usb_submit_urb(urb, GFP_ATOMIC);
1323         if (retval)
1324                 dev_err(dev, "%s - usb_submit_urb failed with result: %d\n",
1325                         __func__, retval);
1326 }
1327
1328 static int usbtouch_start_io(struct usbtouch_usb *usbtouch)
1329 {
1330         guard(mutex)(&usbtouch->pm_mutex);
1331
1332         if (!usbtouch->type->irq_always)
1333                 if (usb_submit_urb(usbtouch->irq, GFP_KERNEL))
1334                         return -EIO;
1335
1336         usbtouch->interface->needs_remote_wakeup = 1;
1337         usbtouch->is_open = true;
1338
1339         return 0;
1340 }
1341
1342 static int usbtouch_open(struct input_dev *input)
1343 {
1344         struct usbtouch_usb *usbtouch = input_get_drvdata(input);
1345         int r;
1346
1347         usbtouch->irq->dev = interface_to_usbdev(usbtouch->interface);
1348
1349         r = usb_autopm_get_interface(usbtouch->interface) ? -EIO : 0;
1350         if (r)
1351                 return r;
1352
1353         r = usbtouch_start_io(usbtouch);
1354
1355         usb_autopm_put_interface(usbtouch->interface);
1356         return r;
1357 }
1358
1359 static void usbtouch_close(struct input_dev *input)
1360 {
1361         struct usbtouch_usb *usbtouch = input_get_drvdata(input);
1362         int r;
1363
1364         scoped_guard(mutex, &usbtouch->pm_mutex) {
1365                 if (!usbtouch->type->irq_always)
1366                         usb_kill_urb(usbtouch->irq);
1367                 usbtouch->is_open = false;
1368         }
1369
1370         r = usb_autopm_get_interface(usbtouch->interface);
1371         usbtouch->interface->needs_remote_wakeup = 0;
1372         if (!r)
1373                 usb_autopm_put_interface(usbtouch->interface);
1374 }
1375
1376 static int usbtouch_suspend(struct usb_interface *intf, pm_message_t message)
1377 {
1378         struct usbtouch_usb *usbtouch = usb_get_intfdata(intf);
1379
1380         usb_kill_urb(usbtouch->irq);
1381
1382         return 0;
1383 }
1384
1385 static int usbtouch_resume(struct usb_interface *intf)
1386 {
1387         struct usbtouch_usb *usbtouch = usb_get_intfdata(intf);
1388
1389         guard(mutex)(&usbtouch->pm_mutex);
1390
1391         if (usbtouch->is_open || usbtouch->type->irq_always)
1392                 return usb_submit_urb(usbtouch->irq, GFP_NOIO);
1393
1394         return 0;
1395 }
1396
1397 static int usbtouch_reset_resume(struct usb_interface *intf)
1398 {
1399         struct usbtouch_usb *usbtouch = usb_get_intfdata(intf);
1400         int err;
1401
1402         /* reinit the device */
1403         if (usbtouch->type->init) {
1404                 err = usbtouch->type->init(usbtouch);
1405                 if (err) {
1406                         dev_dbg(&intf->dev,
1407                                 "%s - type->init() failed, err: %d\n",
1408                                 __func__, err);
1409                         return err;
1410                 }
1411         }
1412
1413         /* restart IO if needed */
1414         guard(mutex)(&usbtouch->pm_mutex);
1415
1416         if (usbtouch->is_open)
1417                 return usb_submit_urb(usbtouch->irq, GFP_NOIO);
1418
1419         return 0;
1420 }
1421
1422 static void usbtouch_free_buffers(struct usb_device *udev,
1423                                   struct usbtouch_usb *usbtouch)
1424 {
1425         usb_free_coherent(udev, usbtouch->data_size,
1426                           usbtouch->data, usbtouch->data_dma);
1427         kfree(usbtouch->buffer);
1428 }
1429
1430 static struct usb_endpoint_descriptor *
1431 usbtouch_get_input_endpoint(struct usb_host_interface *interface)
1432 {
1433         int i;
1434
1435         for (i = 0; i < interface->desc.bNumEndpoints; i++)
1436                 if (usb_endpoint_dir_in(&interface->endpoint[i].desc))
1437                         return &interface->endpoint[i].desc;
1438
1439         return NULL;
1440 }
1441
1442 static int usbtouch_probe(struct usb_interface *intf,
1443                           const struct usb_device_id *id)
1444 {
1445         struct usbtouch_usb *usbtouch;
1446         struct input_dev *input_dev;
1447         struct usb_endpoint_descriptor *endpoint;
1448         struct usb_device *udev = interface_to_usbdev(intf);
1449         const struct usbtouch_device_info *type;
1450         int err = -ENOMEM;
1451
1452         /* some devices are ignored */
1453         type = (const struct usbtouch_device_info *)id->driver_info;
1454         if (!type)
1455                 return -ENODEV;
1456
1457         endpoint = usbtouch_get_input_endpoint(intf->cur_altsetting);
1458         if (!endpoint)
1459                 return -ENXIO;
1460
1461         usbtouch = kzalloc(sizeof(*usbtouch), GFP_KERNEL);
1462         input_dev = input_allocate_device();
1463         if (!usbtouch || !input_dev)
1464                 goto out_free;
1465
1466         mutex_init(&usbtouch->pm_mutex);
1467         usbtouch->type = type;
1468
1469         usbtouch->data_size = type->rept_size;
1470         if (type->get_pkt_len) {
1471                 /*
1472                  * When dealing with variable-length packets we should
1473                  * not request more than wMaxPacketSize bytes at once
1474                  * as we do not know if there is more data coming or
1475                  * we filled exactly wMaxPacketSize bytes and there is
1476                  * nothing else.
1477                  */
1478                 usbtouch->data_size = min(usbtouch->data_size,
1479                                           usb_endpoint_maxp(endpoint));
1480         }
1481
1482         usbtouch->data = usb_alloc_coherent(udev, usbtouch->data_size,
1483                                             GFP_KERNEL, &usbtouch->data_dma);
1484         if (!usbtouch->data)
1485                 goto out_free;
1486
1487         if (type->get_pkt_len) {
1488                 usbtouch->buffer = kmalloc(type->rept_size, GFP_KERNEL);
1489                 if (!usbtouch->buffer)
1490                         goto out_free_buffers;
1491                 usbtouch->process_pkt = usbtouch_process_multi;
1492         } else {
1493                 usbtouch->process_pkt = usbtouch_process_pkt;
1494         }
1495
1496         usbtouch->irq = usb_alloc_urb(0, GFP_KERNEL);
1497         if (!usbtouch->irq) {
1498                 dev_dbg(&intf->dev,
1499                         "%s - usb_alloc_urb failed: usbtouch->irq\n", __func__);
1500                 goto out_free_buffers;
1501         }
1502
1503         usbtouch->interface = intf;
1504         usbtouch->input = input_dev;
1505
1506         if (udev->manufacturer)
1507                 strscpy(usbtouch->name, udev->manufacturer, sizeof(usbtouch->name));
1508
1509         if (udev->product) {
1510                 if (udev->manufacturer)
1511                         strlcat(usbtouch->name, " ", sizeof(usbtouch->name));
1512                 strlcat(usbtouch->name, udev->product, sizeof(usbtouch->name));
1513         }
1514
1515         if (!strlen(usbtouch->name))
1516                 snprintf(usbtouch->name, sizeof(usbtouch->name),
1517                         "USB Touchscreen %04x:%04x",
1518                          le16_to_cpu(udev->descriptor.idVendor),
1519                          le16_to_cpu(udev->descriptor.idProduct));
1520
1521         usb_make_path(udev, usbtouch->phys, sizeof(usbtouch->phys));
1522         strlcat(usbtouch->phys, "/input0", sizeof(usbtouch->phys));
1523
1524         input_dev->name = usbtouch->name;
1525         input_dev->phys = usbtouch->phys;
1526         usb_to_input_id(udev, &input_dev->id);
1527         input_dev->dev.parent = &intf->dev;
1528
1529         input_set_drvdata(input_dev, usbtouch);
1530
1531         input_dev->open = usbtouch_open;
1532         input_dev->close = usbtouch_close;
1533
1534         input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
1535         input_dev->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH);
1536         input_set_abs_params(input_dev, ABS_X, type->min_xc, type->max_xc, 0, 0);
1537         input_set_abs_params(input_dev, ABS_Y, type->min_yc, type->max_yc, 0, 0);
1538         if (type->max_press)
1539                 input_set_abs_params(input_dev, ABS_PRESSURE, type->min_press,
1540                                      type->max_press, 0, 0);
1541
1542         if (usb_endpoint_type(endpoint) == USB_ENDPOINT_XFER_INT)
1543                 usb_fill_int_urb(usbtouch->irq, udev,
1544                          usb_rcvintpipe(udev, endpoint->bEndpointAddress),
1545                          usbtouch->data, usbtouch->data_size,
1546                          usbtouch_irq, usbtouch, endpoint->bInterval);
1547         else
1548                 usb_fill_bulk_urb(usbtouch->irq, udev,
1549                          usb_rcvbulkpipe(udev, endpoint->bEndpointAddress),
1550                          usbtouch->data, usbtouch->data_size,
1551                          usbtouch_irq, usbtouch);
1552
1553         usbtouch->irq->dev = udev;
1554         usbtouch->irq->transfer_dma = usbtouch->data_dma;
1555         usbtouch->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1556
1557         /* device specific allocations */
1558         if (type->alloc) {
1559                 err = type->alloc(usbtouch);
1560                 if (err) {
1561                         dev_dbg(&intf->dev,
1562                                 "%s - type->alloc() failed, err: %d\n",
1563                                 __func__, err);
1564                         goto out_free_urb;
1565                 }
1566         }
1567
1568         /* device specific initialisation*/
1569         if (type->init) {
1570                 err = type->init(usbtouch);
1571                 if (err) {
1572                         dev_dbg(&intf->dev,
1573                                 "%s - type->init() failed, err: %d\n",
1574                                 __func__, err);
1575                         goto out_do_exit;
1576                 }
1577         }
1578
1579         err = input_register_device(usbtouch->input);
1580         if (err) {
1581                 dev_dbg(&intf->dev,
1582                         "%s - input_register_device failed, err: %d\n",
1583                         __func__, err);
1584                 goto out_do_exit;
1585         }
1586
1587         usb_set_intfdata(intf, usbtouch);
1588
1589         if (usbtouch->type->irq_always) {
1590                 /* this can't fail */
1591                 usb_autopm_get_interface(intf);
1592                 err = usb_submit_urb(usbtouch->irq, GFP_KERNEL);
1593                 if (err) {
1594                         usb_autopm_put_interface(intf);
1595                         dev_err(&intf->dev,
1596                                 "%s - usb_submit_urb failed with result: %d\n",
1597                                 __func__, err);
1598                         goto out_unregister_input;
1599                 }
1600         }
1601
1602         return 0;
1603
1604 out_unregister_input:
1605         input_unregister_device(input_dev);
1606         input_dev = NULL;
1607 out_do_exit:
1608         if (type->exit)
1609                 type->exit(usbtouch);
1610 out_free_urb:
1611         usb_free_urb(usbtouch->irq);
1612 out_free_buffers:
1613         usbtouch_free_buffers(udev, usbtouch);
1614 out_free:
1615         input_free_device(input_dev);
1616         kfree(usbtouch);
1617         return err;
1618 }
1619
1620 static void usbtouch_disconnect(struct usb_interface *intf)
1621 {
1622         struct usbtouch_usb *usbtouch = usb_get_intfdata(intf);
1623
1624         if (!usbtouch)
1625                 return;
1626
1627         dev_dbg(&intf->dev,
1628                 "%s - usbtouch is initialized, cleaning up\n", __func__);
1629
1630         usb_set_intfdata(intf, NULL);
1631         /* this will stop IO via close */
1632         input_unregister_device(usbtouch->input);
1633         usb_free_urb(usbtouch->irq);
1634         if (usbtouch->type->exit)
1635                 usbtouch->type->exit(usbtouch);
1636         usbtouch_free_buffers(interface_to_usbdev(intf), usbtouch);
1637         kfree(usbtouch);
1638 }
1639
1640 static const struct attribute_group *usbtouch_groups[] = {
1641 #ifdef CONFIG_TOUCHSCREEN_USB_3M
1642         &mtouch_attr_group,
1643 #endif
1644         NULL
1645 };
1646
1647 static const struct usb_device_id usbtouch_devices[] = {
1648 #ifdef CONFIG_TOUCHSCREEN_USB_EGALAX
1649         /* ignore the HID capable devices, handled by usbhid */
1650         { USB_DEVICE_INTERFACE_CLASS(0x0eef, 0x0001, USB_INTERFACE_CLASS_HID),
1651                 .driver_info = 0 },
1652         { USB_DEVICE_INTERFACE_CLASS(0x0eef, 0x0002, USB_INTERFACE_CLASS_HID),
1653                 .driver_info = 0 },
1654
1655         /* normal device IDs */
1656         { USB_DEVICE(0x3823, 0x0001),
1657                 .driver_info = (kernel_ulong_t)&egalax_dev_info },
1658         { USB_DEVICE(0x3823, 0x0002),
1659                 .driver_info = (kernel_ulong_t)&egalax_dev_info },
1660         { USB_DEVICE(0x0123, 0x0001),
1661                 .driver_info = (kernel_ulong_t)&egalax_dev_info },
1662         { USB_DEVICE(0x0eef, 0x0001),
1663                 .driver_info = (kernel_ulong_t)&egalax_dev_info },
1664         { USB_DEVICE(0x0eef, 0x0002),
1665                 .driver_info = (kernel_ulong_t)&egalax_dev_info },
1666         { USB_DEVICE(0x1234, 0x0001),
1667                 .driver_info = (kernel_ulong_t)&egalax_dev_info },
1668         { USB_DEVICE(0x1234, 0x0002),
1669                 .driver_info = (kernel_ulong_t)&egalax_dev_info },
1670 #endif
1671
1672 #ifdef CONFIG_TOUCHSCREEN_USB_PANJIT
1673         { USB_DEVICE(0x134c, 0x0001),
1674                 .driver_info = (kernel_ulong_t)&panjit_dev_info },
1675         { USB_DEVICE(0x134c, 0x0002),
1676                 .driver_info = (kernel_ulong_t)&panjit_dev_info },
1677         { USB_DEVICE(0x134c, 0x0003),
1678                 .driver_info = (kernel_ulong_t)&panjit_dev_info },
1679         { USB_DEVICE(0x134c, 0x0004),
1680                 .driver_info = (kernel_ulong_t)&panjit_dev_info },
1681 #endif
1682
1683 #ifdef CONFIG_TOUCHSCREEN_USB_3M
1684         { USB_DEVICE(0x0596, 0x0001),
1685                 .driver_info = (kernel_ulong_t)&mtouch_dev_info },
1686 #endif
1687
1688 #ifdef CONFIG_TOUCHSCREEN_USB_ITM
1689         { USB_DEVICE(0x0403, 0xf9e9),
1690                 .driver_info = (kernel_ulong_t)&itm_dev_info },
1691         { USB_DEVICE(0x16e3, 0xf9e9),
1692                 .driver_info = (kernel_ulong_t)&itm_dev_info },
1693 #endif
1694
1695 #ifdef CONFIG_TOUCHSCREEN_USB_ETURBO
1696         { USB_DEVICE(0x1234, 0x5678),
1697                 .driver_info = (kernel_ulong_t)&eturbo_dev_info },
1698 #endif
1699
1700 #ifdef CONFIG_TOUCHSCREEN_USB_GUNZE
1701         { USB_DEVICE(0x0637, 0x0001),
1702                 .driver_info = (kernel_ulong_t)&gunze_dev_info },
1703 #endif
1704
1705 #ifdef CONFIG_TOUCHSCREEN_USB_DMC_TSC10
1706         { USB_DEVICE(0x0afa, 0x03e8),
1707                 .driver_info = (kernel_ulong_t)&dmc_tsc10_dev_info },
1708 #endif
1709
1710 #ifdef CONFIG_TOUCHSCREEN_USB_IRTOUCH
1711         { USB_DEVICE(0x255e, 0x0001),
1712                 .driver_info = (kernel_ulong_t)&irtouch_dev_info },
1713         { USB_DEVICE(0x595a, 0x0001),
1714                 .driver_info = (kernel_ulong_t)&irtouch_dev_info },
1715         { USB_DEVICE(0x6615, 0x0001),
1716                 .driver_info = (kernel_ulong_t)&irtouch_dev_info },
1717         { USB_DEVICE(0x6615, 0x0012),
1718                 .driver_info = (kernel_ulong_t)&irtouch_hires_dev_info },
1719 #endif
1720
1721 #ifdef CONFIG_TOUCHSCREEN_USB_IDEALTEK
1722         { USB_DEVICE(0x1391, 0x1000),
1723                 .driver_info = (kernel_ulong_t)&idealtek_dev_info },
1724 #endif
1725
1726 #ifdef CONFIG_TOUCHSCREEN_USB_GENERAL_TOUCH
1727         { USB_DEVICE(0x0dfc, 0x0001),
1728                 .driver_info = (kernel_ulong_t)&general_touch_dev_info },
1729 #endif
1730
1731 #ifdef CONFIG_TOUCHSCREEN_USB_GOTOP
1732         { USB_DEVICE(0x08f2, 0x007f),
1733                 .driver_info = (kernel_ulong_t)&gotop_dev_info },
1734         { USB_DEVICE(0x08f2, 0x00ce),
1735                 .driver_info = (kernel_ulong_t)&gotop_dev_info },
1736         { USB_DEVICE(0x08f2, 0x00f4),
1737                 .driver_info = (kernel_ulong_t)&gotop_dev_info },
1738 #endif
1739
1740 #ifdef CONFIG_TOUCHSCREEN_USB_JASTEC
1741         { USB_DEVICE(0x0f92, 0x0001),
1742                 .driver_info = (kernel_ulong_t)&jastec_dev_info },
1743 #endif
1744
1745 #ifdef CONFIG_TOUCHSCREEN_USB_E2I
1746         { USB_DEVICE(0x1ac7, 0x0001),
1747                 .driver_info = (kernel_ulong_t)&e2i_dev_info },
1748 #endif
1749
1750 #ifdef CONFIG_TOUCHSCREEN_USB_ZYTRONIC
1751         { USB_DEVICE(0x14c8, 0x0003),
1752                 .driver_info = (kernel_ulong_t)&zytronic_dev_info },
1753 #endif
1754
1755 #ifdef CONFIG_TOUCHSCREEN_USB_ETT_TC45USB
1756         /* TC5UH */
1757         { USB_DEVICE(0x0664, 0x0309),
1758                 .driver_info = (kernel_ulong_t)&tc45usb_dev_info },
1759         /* TC4UM */
1760         { USB_DEVICE(0x0664, 0x0306),
1761                 .driver_info = (kernel_ulong_t)&tc45usb_dev_info },
1762 #endif
1763
1764 #ifdef CONFIG_TOUCHSCREEN_USB_NEXIO
1765         /* data interface only */
1766         { USB_DEVICE_AND_INTERFACE_INFO(0x10f0, 0x2002, 0x0a, 0x00, 0x00),
1767                 .driver_info = (kernel_ulong_t)&nexio_dev_info },
1768         { USB_DEVICE_AND_INTERFACE_INFO(0x1870, 0x0001, 0x0a, 0x00, 0x00),
1769                 .driver_info = (kernel_ulong_t)&nexio_dev_info },
1770 #endif
1771
1772 #ifdef CONFIG_TOUCHSCREEN_USB_ELO
1773         { USB_DEVICE(0x04e7, 0x0020),
1774                 .driver_info = (kernel_ulong_t)&elo_dev_info },
1775 #endif
1776
1777 #ifdef CONFIG_TOUCHSCREEN_USB_EASYTOUCH
1778         { USB_DEVICE(0x7374, 0x0001),
1779                 .driver_info = (kernel_ulong_t)&etouch_dev_info },
1780 #endif
1781
1782         { }
1783 };
1784 MODULE_DEVICE_TABLE(usb, usbtouch_devices);
1785
1786 static struct usb_driver usbtouch_driver = {
1787         .name           = "usbtouchscreen",
1788         .probe          = usbtouch_probe,
1789         .disconnect     = usbtouch_disconnect,
1790         .suspend        = usbtouch_suspend,
1791         .resume         = usbtouch_resume,
1792         .reset_resume   = usbtouch_reset_resume,
1793         .id_table       = usbtouch_devices,
1794         .dev_groups     = usbtouch_groups,
1795         .supports_autosuspend = 1,
1796 };
1797
1798 module_usb_driver(usbtouch_driver);
1799
1800 MODULE_AUTHOR("Daniel Ritz <daniel.ritz@gmx.ch>");
1801 MODULE_DESCRIPTION("USB Touchscreen Driver");
1802 MODULE_LICENSE("GPL");
1803
1804 MODULE_ALIAS("touchkitusb");
1805 MODULE_ALIAS("itmtouch");
1806 MODULE_ALIAS("mtouchusb");