drivers/usb/input/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  *
  12  * Copyright (C) 2004-2006 by Daniel Ritz <daniel.ritz@gmx.ch>
  13  * Copyright (C) by Todd E. Johnson (mtouchusb.c)
  14  *
  15  * This program is free software; you can redistribute it and/or
  16  * modify it under the terms of the GNU General Public License as
  17  * published by the Free Software Foundation; either version 2 of the
  18  * License, or (at your option) any later version.
  19  *
  20  * This program is distributed in the hope that it will be useful, but
  21  * WITHOUT ANY WARRANTY; without even the implied warranty of
  22  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  23  * General Public License for more details.
  24  *
  25  * You should have received a copy of the GNU General Public License
  26  * along with this program; if not, write to the Free Software
  27  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  28  *
  29  * Driver is based on touchkitusb.c
  30  * - ITM parts are from itmtouch.c
  31  * - 3M parts are from mtouchusb.c
  32  * - PanJit parts are from an unmerged driver by Lanslott Gish
  33  *
  34  *****************************************************************************/
  35
  36 //#define DEBUG
  37
  38 #include <linux/kernel.h>
  39 #include <linux/slab.h>
  40 #include <linux/input.h>
  41 #include <linux/module.h>
  42 #include <linux/init.h>
  43 #include <linux/usb.h>
  44 #include <linux/usb/input.h>
  45
  46
  47 #define DRIVER_VERSION          "v0.4"
  48 #define DRIVER_AUTHOR           "Daniel Ritz <daniel.ritz@gmx.ch>"
  49 #define DRIVER_DESC             "USB Touchscreen Driver"
  50
  51 static int swap_xy;
  52 module_param(swap_xy, bool, 0644);
  53 MODULE_PARM_DESC(swap_xy, "If set X and Y axes are swapped.");
  54
  55 /* device specifc data/functions */
  56 struct usbtouch_usb;
  57 struct usbtouch_device_info {
  58         int min_xc, max_xc;
  59         int min_yc, max_yc;
  60         int min_press, max_press;
  61         int rept_size;
  62         int flags;
  63
  64         void (*process_pkt) (struct usbtouch_usb *usbtouch, struct pt_regs *regs, unsigned char *pkt, int len);
  65         int  (*get_pkt_len) (unsigned char *pkt, int len);
  66         int  (*read_data)   (unsigned char *pkt, int *x, int *y, int *touch, int *press);
  67         int  (*init)        (struct usbtouch_usb *usbtouch);
  68 };
  69
  70 #define USBTOUCH_FLG_BUFFER     0x01
  71
  72
  73 /* a usbtouch device */
  74 struct usbtouch_usb {
  75         unsigned char *data;
  76         dma_addr_t data_dma;
  77         unsigned char *buffer;
  78         int buf_len;
  79         struct urb *irq;
  80         struct usb_device *udev;
  81         struct input_dev *input;
  82         struct usbtouch_device_info *type;
  83         char name[128];
  84         char phys[64];
  85 };
  86
  87
  88 #if defined(CONFIG_USB_TOUCHSCREEN_EGALAX) || defined(CONFIG_USB_TOUCHSCREEN_ETURBO)
  89 #define MULTI_PACKET
  90 #endif
  91
  92 #ifdef MULTI_PACKET
  93 static void usbtouch_process_multi(struct usbtouch_usb *usbtouch,
  94                                    struct pt_regs *regs,
  95                                    unsigned char *pkt, int len);
  96 #endif
  97
  98 /* device types */
  99 enum {
 100         DEVTPYE_DUMMY = -1,
 101         DEVTYPE_EGALAX,
 102         DEVTYPE_PANJIT,
 103         DEVTYPE_3M,
 104         DEVTYPE_ITM,
 105         DEVTYPE_ETURBO,
 106         DEVTYPE_GUNZE,
 107 };
 108
 109 static struct usb_device_id usbtouch_devices[] = {
 110 #ifdef CONFIG_USB_TOUCHSCREEN_EGALAX
 111         {USB_DEVICE(0x3823, 0x0001), .driver_info = DEVTYPE_EGALAX},
 112         {USB_DEVICE(0x3823, 0x0002), .driver_info = DEVTYPE_EGALAX},
 113         {USB_DEVICE(0x0123, 0x0001), .driver_info = DEVTYPE_EGALAX},
 114         {USB_DEVICE(0x0eef, 0x0001), .driver_info = DEVTYPE_EGALAX},
 115         {USB_DEVICE(0x0eef, 0x0002), .driver_info = DEVTYPE_EGALAX},
 116         {USB_DEVICE(0x1234, 0x0001), .driver_info = DEVTYPE_EGALAX},
 117         {USB_DEVICE(0x1234, 0x0002), .driver_info = DEVTYPE_EGALAX},
 118 #endif
 119
 120 #ifdef CONFIG_USB_TOUCHSCREEN_PANJIT
 121         {USB_DEVICE(0x134c, 0x0001), .driver_info = DEVTYPE_PANJIT},
 122         {USB_DEVICE(0x134c, 0x0002), .driver_info = DEVTYPE_PANJIT},
 123         {USB_DEVICE(0x134c, 0x0003), .driver_info = DEVTYPE_PANJIT},
 124         {USB_DEVICE(0x134c, 0x0004), .driver_info = DEVTYPE_PANJIT},
 125 #endif
 126
 127 #ifdef CONFIG_USB_TOUCHSCREEN_3M
 128         {USB_DEVICE(0x0596, 0x0001), .driver_info = DEVTYPE_3M},
 129 #endif
 130
 131 #ifdef CONFIG_USB_TOUCHSCREEN_ITM
 132         {USB_DEVICE(0x0403, 0xf9e9), .driver_info = DEVTYPE_ITM},
 133 #endif
 134
 135 #ifdef CONFIG_USB_TOUCHSCREEN_ETURBO
 136         {USB_DEVICE(0x1234, 0x5678), .driver_info = DEVTYPE_ETURBO},
 137 #endif
 138
 139 #ifdef CONFIG_USB_TOUCHSCREEN_GUNZE
 140         {USB_DEVICE(0x0637, 0x0001), .driver_info = DEVTYPE_GUNZE},
 141 #endif
 142
 143         {}
 144 };
 145
 146
 147 /*****************************************************************************
 148  * eGalax part
 149  */
 150
 151 #ifdef CONFIG_USB_TOUCHSCREEN_EGALAX
 152
 153 #define EGALAX_PKT_TYPE_MASK            0xFE
 154 #define EGALAX_PKT_TYPE_REPT            0x80
 155 #define EGALAX_PKT_TYPE_DIAG            0x0A
 156
 157 static int egalax_read_data(unsigned char *pkt, int *x, int *y, int *touch, int *press)
 158 {
 159         if ((pkt[0] & EGALAX_PKT_TYPE_MASK) != EGALAX_PKT_TYPE_REPT)
 160                 return 0;
 161
 162         *x = ((pkt[3] & 0x0F) << 7) | (pkt[4] & 0x7F);
 163         *y = ((pkt[1] & 0x0F) << 7) | (pkt[2] & 0x7F);
 164         *touch = pkt[0] & 0x01;
 165
 166         return 1;
 167 }
 168
 169 static int egalax_get_pkt_len(unsigned char *buf, int len)
 170 {
 171         switch (buf[0] & EGALAX_PKT_TYPE_MASK) {
 172         case EGALAX_PKT_TYPE_REPT:
 173                 return 5;
 174
 175         case EGALAX_PKT_TYPE_DIAG:
 176                 if (len < 2)
 177                         return -1;
 178
 179                 return buf[1] + 2;
 180         }
 181
 182         return 0;
 183 }
 184 #endif
 185
 186
 187 /*****************************************************************************
 188  * PanJit Part
 189  */
 190 #ifdef CONFIG_USB_TOUCHSCREEN_PANJIT
 191 static int panjit_read_data(unsigned char *pkt, int *x, int *y, int *touch, int *press)
 192 {
 193         *x = ((pkt[2] & 0x0F) << 8) | pkt[1];
 194         *y = ((pkt[4] & 0x0F) << 8) | pkt[3];
 195         *touch = pkt[0] & 0x01;
 196
 197         return 1;
 198 }
 199 #endif
 200
 201
 202 /*****************************************************************************
 203  * 3M/Microtouch Part
 204  */
 205 #ifdef CONFIG_USB_TOUCHSCREEN_3M
 206
 207 #define MTOUCHUSB_ASYNC_REPORT          1
 208 #define MTOUCHUSB_RESET                 7
 209 #define MTOUCHUSB_REQ_CTRLLR_ID         10
 210
 211 static int mtouch_read_data(unsigned char *pkt, int *x, int *y, int *touch, int *press)
 212 {
 213         *x = (pkt[8] << 8) | pkt[7];
 214         *y = (pkt[10] << 8) | pkt[9];
 215         *touch = (pkt[2] & 0x40) ? 1 : 0;
 216
 217         return 1;
 218 }
 219
 220 static int mtouch_init(struct usbtouch_usb *usbtouch)
 221 {
 222         int ret, i;
 223
 224         ret = usb_control_msg(usbtouch->udev, usb_rcvctrlpipe(usbtouch->udev, 0),
 225                               MTOUCHUSB_RESET,
 226                               USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 227                               1, 0, NULL, 0, USB_CTRL_SET_TIMEOUT);
 228         dbg("%s - usb_control_msg - MTOUCHUSB_RESET - bytes|err: %d",
 229             __FUNCTION__, ret);
 230         if (ret < 0)
 231                 return ret;
 232         msleep(150);
 233
 234         for (i = 0; i < 3; i++) {
 235                 ret = usb_control_msg(usbtouch->udev, usb_rcvctrlpipe(usbtouch->udev, 0),
 236                                       MTOUCHUSB_ASYNC_REPORT,
 237                                       USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 238                                       1, 1, NULL, 0, USB_CTRL_SET_TIMEOUT);
 239                 dbg("%s - usb_control_msg - MTOUCHUSB_ASYNC_REPORT - bytes|err: %d",
 240                     __FUNCTION__, ret);
 241                 if (ret >= 0)
 242                         break;
 243                 if (ret != -EPIPE)
 244                         return ret;
 245         }
 246
 247         return 0;
 248 }
 249 #endif
 250
 251
 252 /*****************************************************************************
 253  * ITM Part
 254  */
 255 #ifdef CONFIG_USB_TOUCHSCREEN_ITM
 256 static int itm_read_data(unsigned char *pkt, int *x, int *y, int *touch, int *press)
 257 {
 258         *x = ((pkt[0] & 0x1F) << 7) | (pkt[3] & 0x7F);
 259         *y = ((pkt[1] & 0x1F) << 7) | (pkt[4] & 0x7F);
 260         *press = ((pkt[2] & 0x1F) << 7) | (pkt[5] & 0x7F);
 261         *touch = ~pkt[7] & 0x20;
 262
 263         return 1;
 264 }
 265 #endif
 266
 267
 268 /*****************************************************************************
 269  * eTurboTouch part
 270  */
 271 #ifdef CONFIG_USB_TOUCHSCREEN_ETURBO
 272 static int eturbo_read_data(unsigned char *pkt, int *x, int *y, int *touch, int *press)
 273 {
 274         unsigned int shift;
 275
 276         /* packets should start with sync */
 277         if (!(pkt[0] & 0x80))
 278                 return 0;
 279
 280         shift = (6 - (pkt[0] & 0x03));
 281         *x = ((pkt[3] << 7) | pkt[4]) >> shift;
 282         *y = ((pkt[1] << 7) | pkt[2]) >> shift;
 283         *touch = (pkt[0] & 0x10) ? 1 : 0;
 284
 285         return 1;
 286 }
 287
 288 static int eturbo_get_pkt_len(unsigned char *buf, int len)
 289 {
 290         if (buf[0] & 0x80)
 291                 return 5;
 292         if (buf[0] == 0x01)
 293                 return 3;
 294         return 0;
 295 }
 296 #endif
 297
 298
 299 /*****************************************************************************
 300  * Gunze part
 301  */
 302 #ifdef CONFIG_USB_TOUCHSCREEN_GUNZE
 303 static int gunze_read_data(unsigned char *pkt, int *x, int *y, int *touch, int *press)
 304 {
 305         if (!(pkt[0] & 0x80) || ((pkt[1] | pkt[2] | pkt[3]) & 0x80))
 306                 return 0;
 307
 308         *x = ((pkt[0] & 0x1F) << 7) | (pkt[2] & 0x7F);
 309         *y = ((pkt[1] & 0x1F) << 7) | (pkt[3] & 0x7F);
 310         *touch = pkt[0] & 0x20;
 311
 312         return 1;
 313 }
 314 #endif
 315
 316 /*****************************************************************************
 317  * the different device descriptors
 318  */
 319 static struct usbtouch_device_info usbtouch_dev_info[] = {
 320 #ifdef CONFIG_USB_TOUCHSCREEN_EGALAX
 321         [DEVTYPE_EGALAX] = {
 322                 .min_xc         = 0x0,
 323                 .max_xc         = 0x07ff,
 324                 .min_yc         = 0x0,
 325                 .max_yc         = 0x07ff,
 326                 .rept_size      = 16,
 327                 .flags          = USBTOUCH_FLG_BUFFER,
 328                 .process_pkt    = usbtouch_process_multi,
 329                 .get_pkt_len    = egalax_get_pkt_len,
 330                 .read_data      = egalax_read_data,
 331         },
 332 #endif
 333
 334 #ifdef CONFIG_USB_TOUCHSCREEN_PANJIT
 335         [DEVTYPE_PANJIT] = {
 336                 .min_xc         = 0x0,
 337                 .max_xc         = 0x0fff,
 338                 .min_yc         = 0x0,
 339                 .max_yc         = 0x0fff,
 340                 .rept_size      = 8,
 341                 .read_data      = panjit_read_data,
 342         },
 343 #endif
 344
 345 #ifdef CONFIG_USB_TOUCHSCREEN_3M
 346         [DEVTYPE_3M] = {
 347                 .min_xc         = 0x0,
 348                 .max_xc         = 0x4000,
 349                 .min_yc         = 0x0,
 350                 .max_yc         = 0x4000,
 351                 .rept_size      = 11,
 352                 .read_data      = mtouch_read_data,
 353                 .init           = mtouch_init,
 354         },
 355 #endif
 356
 357 #ifdef CONFIG_USB_TOUCHSCREEN_ITM
 358         [DEVTYPE_ITM] = {
 359                 .min_xc         = 0x0,
 360                 .max_xc         = 0x0fff,
 361                 .min_yc         = 0x0,
 362                 .max_yc         = 0x0fff,
 363                 .max_press      = 0xff,
 364                 .rept_size      = 8,
 365                 .read_data      = itm_read_data,
 366         },
 367 #endif
 368
 369 #ifdef CONFIG_USB_TOUCHSCREEN_ETURBO
 370         [DEVTYPE_ETURBO] = {
 371                 .min_xc         = 0x0,
 372                 .max_xc         = 0x07ff,
 373                 .min_yc         = 0x0,
 374                 .max_yc         = 0x07ff,
 375                 .rept_size      = 8,
 376                 .flags          = USBTOUCH_FLG_BUFFER,
 377                 .process_pkt    = usbtouch_process_multi,
 378                 .get_pkt_len    = eturbo_get_pkt_len,
 379                 .read_data      = eturbo_read_data,
 380         },
 381 #endif
 382
 383 #ifdef CONFIG_USB_TOUCHSCREEN_GUNZE
 384         [DEVTYPE_GUNZE] = {
 385                 .min_xc         = 0x0,
 386                 .max_xc         = 0x0fff,
 387                 .min_yc         = 0x0,
 388                 .max_yc         = 0x0fff,
 389                 .rept_size      = 4,
 390                 .read_data      = gunze_read_data,
 391         },
 392 #endif
 393 };
 394
 395
 396 /*****************************************************************************
 397  * Generic Part
 398  */
 399 static void usbtouch_process_pkt(struct usbtouch_usb *usbtouch,
 400                                  struct pt_regs *regs, unsigned char *pkt, int len)
 401 {
 402         int x, y, touch, press;
 403         struct usbtouch_device_info *type = usbtouch->type;
 404
 405         if (!type->read_data(pkt, &x, &y, &touch, &press))
 406                         return;
 407
 408         input_regs(usbtouch->input, regs);
 409         input_report_key(usbtouch->input, BTN_TOUCH, touch);
 410
 411         if (swap_xy) {
 412                 input_report_abs(usbtouch->input, ABS_X, y);
 413                 input_report_abs(usbtouch->input, ABS_Y, x);
 414         } else {
 415                 input_report_abs(usbtouch->input, ABS_X, x);
 416                 input_report_abs(usbtouch->input, ABS_Y, y);
 417         }
 418         if (type->max_press)
 419                 input_report_abs(usbtouch->input, ABS_PRESSURE, press);
 420         input_sync(usbtouch->input);
 421 }
 422
 423
 424 #ifdef MULTI_PACKET
 425 static void usbtouch_process_multi(struct usbtouch_usb *usbtouch,
 426                                    struct pt_regs *regs,
 427                                    unsigned char *pkt, int len)
 428 {
 429         unsigned char *buffer;
 430         int pkt_len, pos, buf_len, tmp;
 431
 432         /* process buffer */
 433         if (unlikely(usbtouch->buf_len)) {
 434                 /* try to get size */
 435                 pkt_len = usbtouch->type->get_pkt_len(
 436                                 usbtouch->buffer, usbtouch->buf_len);
 437
 438                 /* drop? */
 439                 if (unlikely(!pkt_len))
 440                         goto out_flush_buf;
 441
 442                 /* need to append -pkt_len bytes before able to get size */
 443                 if (unlikely(pkt_len < 0)) {
 444                         int append = -pkt_len;
 445                         if (unlikely(append > len))
 446                                append = len;
 447                         if (usbtouch->buf_len + append >= usbtouch->type->rept_size)
 448                                 goto out_flush_buf;
 449                         memcpy(usbtouch->buffer + usbtouch->buf_len, pkt, append);
 450                         usbtouch->buf_len += append;
 451
 452                         pkt_len = usbtouch->type->get_pkt_len(
 453                                         usbtouch->buffer, usbtouch->buf_len);
 454                         if (pkt_len < 0)
 455                                 return;
 456                 }
 457
 458                 /* append */
 459                 tmp = pkt_len - usbtouch->buf_len;
 460                 if (usbtouch->buf_len + tmp >= usbtouch->type->rept_size)
 461                         goto out_flush_buf;
 462                 memcpy(usbtouch->buffer + usbtouch->buf_len, pkt, tmp);
 463                 usbtouch_process_pkt(usbtouch, regs, usbtouch->buffer, pkt_len);
 464
 465                 buffer = pkt + tmp;
 466                 buf_len = len - tmp;
 467         } else {
 468                 buffer = pkt;
 469                 buf_len = len;
 470         }
 471
 472         /* loop over the received packet, process */
 473         pos = 0;
 474         while (pos < buf_len) {
 475                 /* get packet len */
 476                 pkt_len = usbtouch->type->get_pkt_len(buffer + pos, len);
 477
 478                 /* unknown packet: drop everything */
 479                 if (unlikely(!pkt_len))
 480                         goto out_flush_buf;
 481
 482                 /* full packet: process */
 483                 if (likely((pkt_len > 0) && (pkt_len <= buf_len - pos))) {
 484                         usbtouch_process_pkt(usbtouch, regs, buffer + pos, pkt_len);
 485                 } else {
 486                         /* incomplete packet: save in buffer */
 487                         memcpy(usbtouch->buffer, buffer + pos, buf_len - pos);
 488                         usbtouch->buf_len = buf_len - pos;
 489                         return;
 490                 }
 491                 pos += pkt_len;
 492         }
 493
 494 out_flush_buf:
 495         usbtouch->buf_len = 0;
 496         return;
 497 }
 498 #endif
 499
 500
 501 static void usbtouch_irq(struct urb *urb, struct pt_regs *regs)
 502 {
 503         struct usbtouch_usb *usbtouch = urb->context;
 504         int retval;
 505
 506         switch (urb->status) {
 507         case 0:
 508                 /* success */
 509                 break;
 510         case -ETIME:
 511                 /* this urb is timing out */
 512                 dbg("%s - urb timed out - was the device unplugged?",
 513                     __FUNCTION__);
 514                 return;
 515         case -ECONNRESET:
 516         case -ENOENT:
 517         case -ESHUTDOWN:
 518                 /* this urb is terminated, clean up */
 519                 dbg("%s - urb shutting down with status: %d",
 520                     __FUNCTION__, urb->status);
 521                 return;
 522         default:
 523                 dbg("%s - nonzero urb status received: %d",
 524                     __FUNCTION__, urb->status);
 525                 goto exit;
 526         }
 527
 528         usbtouch->type->process_pkt(usbtouch, regs, usbtouch->data, urb->actual_length);
 529
 530 exit:
 531         retval = usb_submit_urb(urb, GFP_ATOMIC);
 532         if (retval)
 533                 err("%s - usb_submit_urb failed with result: %d",
 534                     __FUNCTION__, retval);
 535 }
 536
 537 static int usbtouch_open(struct input_dev *input)
 538 {
 539         struct usbtouch_usb *usbtouch = input->private;
 540
 541         usbtouch->irq->dev = usbtouch->udev;
 542
 543         if (usb_submit_urb(usbtouch->irq, GFP_KERNEL))
 544                 return -EIO;
 545
 546         return 0;
 547 }
 548
 549 static void usbtouch_close(struct input_dev *input)
 550 {
 551         struct usbtouch_usb *usbtouch = input->private;
 552
 553         usb_kill_urb(usbtouch->irq);
 554 }
 555
 556
 557 static void usbtouch_free_buffers(struct usb_device *udev,
 558                                   struct usbtouch_usb *usbtouch)
 559 {
 560         if (usbtouch->data)
 561                 usb_buffer_free(udev, usbtouch->type->rept_size,
 562                                 usbtouch->data, usbtouch->data_dma);
 563         kfree(usbtouch->buffer);
 564 }
 565
 566
 567 static int usbtouch_probe(struct usb_interface *intf,
 568                           const struct usb_device_id *id)
 569 {
 570         struct usbtouch_usb *usbtouch;
 571         struct input_dev *input_dev;
 572         struct usb_host_interface *interface;
 573         struct usb_endpoint_descriptor *endpoint;
 574         struct usb_device *udev = interface_to_usbdev(intf);
 575         struct usbtouch_device_info *type;
 576         int err = -ENOMEM;
 577
 578         interface = intf->cur_altsetting;
 579         endpoint = &interface->endpoint[0].desc;
 580
 581         usbtouch = kzalloc(sizeof(struct usbtouch_usb), GFP_KERNEL);
 582         input_dev = input_allocate_device();
 583         if (!usbtouch || !input_dev)
 584                 goto out_free;
 585
 586         type = &usbtouch_dev_info[id->driver_info];
 587         usbtouch->type = type;
 588         if (!type->process_pkt)
 589                 type->process_pkt = usbtouch_process_pkt;
 590
 591         usbtouch->data = usb_buffer_alloc(udev, type->rept_size,
 592                                           SLAB_KERNEL, &usbtouch->data_dma);
 593         if (!usbtouch->data)
 594                 goto out_free;
 595
 596         if (type->flags & USBTOUCH_FLG_BUFFER) {
 597                 usbtouch->buffer = kmalloc(type->rept_size, GFP_KERNEL);
 598                 if (!usbtouch->buffer)
 599                         goto out_free_buffers;
 600         }
 601
 602         usbtouch->irq = usb_alloc_urb(0, GFP_KERNEL);
 603         if (!usbtouch->irq) {
 604                 dbg("%s - usb_alloc_urb failed: usbtouch->irq", __FUNCTION__);
 605                 goto out_free_buffers;
 606         }
 607
 608         usbtouch->udev = udev;
 609         usbtouch->input = input_dev;
 610
 611         if (udev->manufacturer)
 612                 strlcpy(usbtouch->name, udev->manufacturer, sizeof(usbtouch->name));
 613
 614         if (udev->product) {
 615                 if (udev->manufacturer)
 616                         strlcat(usbtouch->name, " ", sizeof(usbtouch->name));
 617                 strlcat(usbtouch->name, udev->product, sizeof(usbtouch->name));
 618         }
 619
 620         if (!strlen(usbtouch->name))
 621                 snprintf(usbtouch->name, sizeof(usbtouch->name),
 622                         "USB Touchscreen %04x:%04x",
 623                          le16_to_cpu(udev->descriptor.idVendor),
 624                          le16_to_cpu(udev->descriptor.idProduct));
 625
 626         usb_make_path(udev, usbtouch->phys, sizeof(usbtouch->phys));
 627         strlcpy(usbtouch->phys, "/input0", sizeof(usbtouch->phys));
 628
 629         input_dev->name = usbtouch->name;
 630         input_dev->phys = usbtouch->phys;
 631         usb_to_input_id(udev, &input_dev->id);
 632         input_dev->cdev.dev = &intf->dev;
 633         input_dev->private = usbtouch;
 634         input_dev->open = usbtouch_open;
 635         input_dev->close = usbtouch_close;
 636
 637         input_dev->evbit[0] = BIT(EV_KEY) | BIT(EV_ABS);
 638         input_dev->keybit[LONG(BTN_TOUCH)] = BIT(BTN_TOUCH);
 639         input_set_abs_params(input_dev, ABS_X, type->min_xc, type->max_xc, 0, 0);
 640         input_set_abs_params(input_dev, ABS_Y, type->min_yc, type->max_yc, 0, 0);
 641         if (type->max_press)
 642                 input_set_abs_params(input_dev, ABS_PRESSURE, type->min_press,
 643                                      type->max_press, 0, 0);
 644
 645         usb_fill_int_urb(usbtouch->irq, usbtouch->udev,
 646                          usb_rcvintpipe(usbtouch->udev, 0x81),
 647                          usbtouch->data, type->rept_size,
 648                          usbtouch_irq, usbtouch, endpoint->bInterval);
 649
 650         usbtouch->irq->dev = usbtouch->udev;
 651         usbtouch->irq->transfer_dma = usbtouch->data_dma;
 652         usbtouch->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
 653
 654         /* device specific init */
 655         if (type->init) {
 656                 err = type->init(usbtouch);
 657                 if (err) {
 658                         dbg("%s - type->init() failed, err: %d", __FUNCTION__, err);
 659                         goto out_free_buffers;
 660                 }
 661         }
 662
 663         err = input_register_device(usbtouch->input);
 664         if (err) {
 665                 dbg("%s - input_register_device failed, err: %d", __FUNCTION__, err);
 666                 goto out_free_buffers;
 667         }
 668
 669         usb_set_intfdata(intf, usbtouch);
 670
 671         return 0;
 672
 673 out_free_buffers:
 674         usbtouch_free_buffers(udev, usbtouch);
 675 out_free:
 676         input_free_device(input_dev);
 677         kfree(usbtouch);
 678         return err;
 679 }
 680
 681 static void usbtouch_disconnect(struct usb_interface *intf)
 682 {
 683         struct usbtouch_usb *usbtouch = usb_get_intfdata(intf);
 684
 685         dbg("%s - called", __FUNCTION__);
 686
 687         if (!usbtouch)
 688                 return;
 689
 690         dbg("%s - usbtouch is initialized, cleaning up", __FUNCTION__);
 691         usb_set_intfdata(intf, NULL);
 692         usb_kill_urb(usbtouch->irq);
 693         input_unregister_device(usbtouch->input);
 694         usb_free_urb(usbtouch->irq);
 695         usbtouch_free_buffers(interface_to_usbdev(intf), usbtouch);
 696         kfree(usbtouch);
 697 }
 698
 699 MODULE_DEVICE_TABLE(usb, usbtouch_devices);
 700
 701 static struct usb_driver usbtouch_driver = {
 702         .name           = "usbtouchscreen",
 703         .probe          = usbtouch_probe,
 704         .disconnect     = usbtouch_disconnect,
 705         .id_table       = usbtouch_devices,
 706 };
 707
 708 static int __init usbtouch_init(void)
 709 {
 710         return usb_register(&usbtouch_driver);
 711 }
 712
 713 static void __exit usbtouch_cleanup(void)
 714 {
 715         usb_deregister(&usbtouch_driver);
 716 }
 717
 718 module_init(usbtouch_init);
 719 module_exit(usbtouch_cleanup);
 720
 721 MODULE_AUTHOR(DRIVER_AUTHOR);
 722 MODULE_DESCRIPTION(DRIVER_DESC);
 723 MODULE_LICENSE("GPL");
 724
 725 MODULE_ALIAS("touchkitusb");
 726 MODULE_ALIAS("itmtouch");
 727 MODULE_ALIAS("mtouchusb");