drivers/input/touchscreen/usbtouchscreen.c

   1 /******************************************************************************
   2  * usbtouchscreen.c
   3  * Driver for USB Touchscreens, supporting those devices:
   4  *  - eGalax Touchkit
   5  *    includes eTurboTouch CT-410/510/700
   6  *  - 3M/Microtouch  EX II series
   7  *  - ITM
   8  *  - PanJit TouchSet
   9  *  - eTurboTouch
  10  *  - Gunze AHL61
  11  *  - DMC TSC-10/25
  12  *  - IRTOUCHSYSTEMS/UNITOP
  13  *  - IdealTEK URTC1000
  14  *  - General Touch
  15  *  - GoTop Super_Q2/GogoPen/PenPower tablets
  16  *
  17  * Copyright (C) 2004-2007 by Daniel Ritz <daniel.ritz@gmx.ch>
  18  * Copyright (C) by Todd E. Johnson (mtouchusb.c)
  19  *
  20  * This program is free software; you can redistribute it and/or
  21  * modify it under the terms of the GNU General Public License as
  22  * published by the Free Software Foundation; either version 2 of the
  23  * License, or (at your option) any later version.
  24  *
  25  * This program is distributed in the hope that it will be useful, but
  26  * WITHOUT ANY WARRANTY; without even the implied warranty of
  27  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  28  * General Public License for more details.
  29  *
  30  * You should have received a copy of the GNU General Public License
  31  * along with this program; if not, write to the Free Software
  32  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  33  *
  34  * Driver is based on touchkitusb.c
  35  * - ITM parts are from itmtouch.c
  36  * - 3M parts are from mtouchusb.c
  37  * - PanJit parts are from an unmerged driver by Lanslott Gish
  38  * - DMC TSC 10/25 are from Holger Schurig, with ideas from an unmerged
  39  *   driver from Marius Vollmer
  40  *
  41  *****************************************************************************/
  42
  43 //#define DEBUG
  44
  45 #include <linux/kernel.h>
  46 #include <linux/slab.h>
  47 #include <linux/input.h>
  48 #include <linux/module.h>
  49 #include <linux/init.h>
  50 #include <linux/usb.h>
  51 #include <linux/usb/input.h>
  52 #include <linux/hid.h>
  53
  54
  55 #define DRIVER_VERSION          "v0.6"
  56 #define DRIVER_AUTHOR           "Daniel Ritz <daniel.ritz@gmx.ch>"
  57 #define DRIVER_DESC             "USB Touchscreen Driver"
  58
  59 static int swap_xy;
  60 module_param(swap_xy, bool, 0644);
  61 MODULE_PARM_DESC(swap_xy, "If set X and Y axes are swapped.");
  62
  63 /* device specifc data/functions */
  64 struct usbtouch_usb;
  65 struct usbtouch_device_info {
  66         int min_xc, max_xc;
  67         int min_yc, max_yc;
  68         int min_press, max_press;
  69         int rept_size;
  70
  71         void (*process_pkt) (struct usbtouch_usb *usbtouch, unsigned char *pkt, int len);
  72
  73         /*
  74          * used to get the packet len. possible return values:
  75          * > 0: packet len
  76          * = 0: skip one byte
  77          * < 0: -return value more bytes needed
  78          */
  79         int  (*get_pkt_len) (unsigned char *pkt, int len);
  80
  81         int  (*read_data)   (struct usbtouch_usb *usbtouch, unsigned char *pkt);
  82         int  (*init)        (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         unsigned char *buffer;
  90         int buf_len;
  91         struct urb *irq;
  92         struct usb_device *udev;
  93         struct input_dev *input;
  94         struct usbtouch_device_info *type;
  95         char name[128];
  96         char phys[64];
  97
  98         int x, y;
  99         int touch, press;
 100 };
 101
 102
 103 /* device types */
 104 enum {
 105         DEVTYPE_IGNORE = -1,
 106         DEVTYPE_EGALAX,
 107         DEVTYPE_PANJIT,
 108         DEVTYPE_3M,
 109         DEVTYPE_ITM,
 110         DEVTYPE_ETURBO,
 111         DEVTYPE_GUNZE,
 112         DEVTYPE_DMC_TSC10,
 113         DEVTYPE_IRTOUCH,
 114         DEVTYPE_IDEALTEK,
 115         DEVTYPE_GENERAL_TOUCH,
 116         DEVTYPE_GOTOP,
 117 };
 118
 119 #define USB_DEVICE_HID_CLASS(vend, prod) \
 120         .match_flags = USB_DEVICE_ID_MATCH_INT_CLASS \
 121                 | USB_DEVICE_ID_MATCH_DEVICE, \
 122         .idVendor = (vend), \
 123         .idProduct = (prod), \
 124         .bInterfaceClass = USB_INTERFACE_CLASS_HID, \
 125         .bInterfaceProtocol = USB_INTERFACE_PROTOCOL_MOUSE
 126
 127 static struct usb_device_id usbtouch_devices[] = {
 128 #ifdef CONFIG_TOUCHSCREEN_USB_EGALAX
 129         /* ignore the HID capable devices, handled by usbhid */
 130         {USB_DEVICE_HID_CLASS(0x0eef, 0x0001), .driver_info = DEVTYPE_IGNORE},
 131         {USB_DEVICE_HID_CLASS(0x0eef, 0x0002), .driver_info = DEVTYPE_IGNORE},
 132
 133         /* normal device IDs */
 134         {USB_DEVICE(0x3823, 0x0001), .driver_info = DEVTYPE_EGALAX},
 135         {USB_DEVICE(0x3823, 0x0002), .driver_info = DEVTYPE_EGALAX},
 136         {USB_DEVICE(0x0123, 0x0001), .driver_info = DEVTYPE_EGALAX},
 137         {USB_DEVICE(0x0eef, 0x0001), .driver_info = DEVTYPE_EGALAX},
 138         {USB_DEVICE(0x0eef, 0x0002), .driver_info = DEVTYPE_EGALAX},
 139         {USB_DEVICE(0x1234, 0x0001), .driver_info = DEVTYPE_EGALAX},
 140         {USB_DEVICE(0x1234, 0x0002), .driver_info = DEVTYPE_EGALAX},
 141 #endif
 142
 143 #ifdef CONFIG_TOUCHSCREEN_USB_PANJIT
 144         {USB_DEVICE(0x134c, 0x0001), .driver_info = DEVTYPE_PANJIT},
 145         {USB_DEVICE(0x134c, 0x0002), .driver_info = DEVTYPE_PANJIT},
 146         {USB_DEVICE(0x134c, 0x0003), .driver_info = DEVTYPE_PANJIT},
 147         {USB_DEVICE(0x134c, 0x0004), .driver_info = DEVTYPE_PANJIT},
 148 #endif
 149
 150 #ifdef CONFIG_TOUCHSCREEN_USB_3M
 151         {USB_DEVICE(0x0596, 0x0001), .driver_info = DEVTYPE_3M},
 152 #endif
 153
 154 #ifdef CONFIG_TOUCHSCREEN_USB_ITM
 155         {USB_DEVICE(0x0403, 0xf9e9), .driver_info = DEVTYPE_ITM},
 156 #endif
 157
 158 #ifdef CONFIG_TOUCHSCREEN_USB_ETURBO
 159         {USB_DEVICE(0x1234, 0x5678), .driver_info = DEVTYPE_ETURBO},
 160 #endif
 161
 162 #ifdef CONFIG_TOUCHSCREEN_USB_GUNZE
 163         {USB_DEVICE(0x0637, 0x0001), .driver_info = DEVTYPE_GUNZE},
 164 #endif
 165
 166 #ifdef CONFIG_TOUCHSCREEN_USB_DMC_TSC10
 167         {USB_DEVICE(0x0afa, 0x03e8), .driver_info = DEVTYPE_DMC_TSC10},
 168 #endif
 169
 170 #ifdef CONFIG_TOUCHSCREEN_USB_IRTOUCH
 171         {USB_DEVICE(0x595a, 0x0001), .driver_info = DEVTYPE_IRTOUCH},
 172         {USB_DEVICE(0x6615, 0x0001), .driver_info = DEVTYPE_IRTOUCH},
 173 #endif
 174
 175 #ifdef CONFIG_TOUCHSCREEN_USB_IDEALTEK
 176         {USB_DEVICE(0x1391, 0x1000), .driver_info = DEVTYPE_IDEALTEK},
 177 #endif
 178
 179 #ifdef CONFIG_TOUCHSCREEN_USB_GENERAL_TOUCH
 180         {USB_DEVICE(0x0dfc, 0x0001), .driver_info = DEVTYPE_GENERAL_TOUCH},
 181 #endif
 182
 183 #ifdef CONFIG_TOUCHSCREEN_USB_GOTOP
 184         {USB_DEVICE(0x08f2, 0x007f), .driver_info = DEVTYPE_GOTOP},
 185         {USB_DEVICE(0x08f2, 0x00ce), .driver_info = DEVTYPE_GOTOP},
 186         {USB_DEVICE(0x08f2, 0x00f4), .driver_info = DEVTYPE_GOTOP},
 187 #endif
 188
 189         {}
 190 };
 191
 192
 193 /*****************************************************************************
 194  * eGalax part
 195  */
 196
 197 #ifdef CONFIG_TOUCHSCREEN_USB_EGALAX
 198
 199 #ifndef MULTI_PACKET
 200 #define MULTI_PACKET
 201 #endif
 202
 203 #define EGALAX_PKT_TYPE_MASK            0xFE
 204 #define EGALAX_PKT_TYPE_REPT            0x80
 205 #define EGALAX_PKT_TYPE_DIAG            0x0A
 206
 207 static int egalax_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 208 {
 209         if ((pkt[0] & EGALAX_PKT_TYPE_MASK) != EGALAX_PKT_TYPE_REPT)
 210                 return 0;
 211
 212         dev->x = ((pkt[3] & 0x0F) << 7) | (pkt[4] & 0x7F);
 213         dev->y = ((pkt[1] & 0x0F) << 7) | (pkt[2] & 0x7F);
 214         dev->touch = pkt[0] & 0x01;
 215
 216         return 1;
 217 }
 218
 219 static int egalax_get_pkt_len(unsigned char *buf, int len)
 220 {
 221         switch (buf[0] & EGALAX_PKT_TYPE_MASK) {
 222         case EGALAX_PKT_TYPE_REPT:
 223                 return 5;
 224
 225         case EGALAX_PKT_TYPE_DIAG:
 226                 if (len < 2)
 227                         return -1;
 228
 229                 return buf[1] + 2;
 230         }
 231
 232         return 0;
 233 }
 234 #endif
 235
 236
 237 /*****************************************************************************
 238  * PanJit Part
 239  */
 240 #ifdef CONFIG_TOUCHSCREEN_USB_PANJIT
 241 static int panjit_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 242 {
 243         dev->x = ((pkt[2] & 0x0F) << 8) | pkt[1];
 244         dev->y = ((pkt[4] & 0x0F) << 8) | pkt[3];
 245         dev->touch = pkt[0] & 0x01;
 246
 247         return 1;
 248 }
 249 #endif
 250
 251
 252 /*****************************************************************************
 253  * 3M/Microtouch Part
 254  */
 255 #ifdef CONFIG_TOUCHSCREEN_USB_3M
 256
 257 #define MTOUCHUSB_ASYNC_REPORT          1
 258 #define MTOUCHUSB_RESET                 7
 259 #define MTOUCHUSB_REQ_CTRLLR_ID         10
 260
 261 static int mtouch_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 262 {
 263         dev->x = (pkt[8] << 8) | pkt[7];
 264         dev->y = (pkt[10] << 8) | pkt[9];
 265         dev->touch = (pkt[2] & 0x40) ? 1 : 0;
 266
 267         return 1;
 268 }
 269
 270 static int mtouch_init(struct usbtouch_usb *usbtouch)
 271 {
 272         int ret, i;
 273
 274         ret = usb_control_msg(usbtouch->udev, usb_rcvctrlpipe(usbtouch->udev, 0),
 275                               MTOUCHUSB_RESET,
 276                               USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 277                               1, 0, NULL, 0, USB_CTRL_SET_TIMEOUT);
 278         dbg("%s - usb_control_msg - MTOUCHUSB_RESET - bytes|err: %d",
 279             __func__, ret);
 280         if (ret < 0)
 281                 return ret;
 282         msleep(150);
 283
 284         for (i = 0; i < 3; i++) {
 285                 ret = usb_control_msg(usbtouch->udev, usb_rcvctrlpipe(usbtouch->udev, 0),
 286                                       MTOUCHUSB_ASYNC_REPORT,
 287                                       USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 288                                       1, 1, NULL, 0, USB_CTRL_SET_TIMEOUT);
 289                 dbg("%s - usb_control_msg - MTOUCHUSB_ASYNC_REPORT - bytes|err: %d",
 290                     __func__, ret);
 291                 if (ret >= 0)
 292                         break;
 293                 if (ret != -EPIPE)
 294                         return ret;
 295         }
 296
 297         return 0;
 298 }
 299 #endif
 300
 301
 302 /*****************************************************************************
 303  * ITM Part
 304  */
 305 #ifdef CONFIG_TOUCHSCREEN_USB_ITM
 306 static int itm_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 307 {
 308         int touch;
 309         /*
 310          * ITM devices report invalid x/y data if not touched.
 311          * if the screen was touched before but is not touched any more
 312          * report touch as 0 with the last valid x/y data once. then stop
 313          * reporting data until touched again.
 314          */
 315         dev->press = ((pkt[2] & 0x01) << 7) | (pkt[5] & 0x7F);
 316
 317         touch = ~pkt[7] & 0x20;
 318         if (!touch) {
 319                 if (dev->touch) {
 320                         dev->touch = 0;
 321                         return 1;
 322                 }
 323
 324                 return 0;
 325         }
 326
 327         dev->x = ((pkt[0] & 0x1F) << 7) | (pkt[3] & 0x7F);
 328         dev->y = ((pkt[1] & 0x1F) << 7) | (pkt[4] & 0x7F);
 329         dev->touch = touch;
 330
 331         return 1;
 332 }
 333 #endif
 334
 335
 336 /*****************************************************************************
 337  * eTurboTouch part
 338  */
 339 #ifdef CONFIG_TOUCHSCREEN_USB_ETURBO
 340 #ifndef MULTI_PACKET
 341 #define MULTI_PACKET
 342 #endif
 343 static int eturbo_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 344 {
 345         unsigned int shift;
 346
 347         /* packets should start with sync */
 348         if (!(pkt[0] & 0x80))
 349                 return 0;
 350
 351         shift = (6 - (pkt[0] & 0x03));
 352         dev->x = ((pkt[3] << 7) | pkt[4]) >> shift;
 353         dev->y = ((pkt[1] << 7) | pkt[2]) >> shift;
 354         dev->touch = (pkt[0] & 0x10) ? 1 : 0;
 355
 356         return 1;
 357 }
 358
 359 static int eturbo_get_pkt_len(unsigned char *buf, int len)
 360 {
 361         if (buf[0] & 0x80)
 362                 return 5;
 363         if (buf[0] == 0x01)
 364                 return 3;
 365         return 0;
 366 }
 367 #endif
 368
 369
 370 /*****************************************************************************
 371  * Gunze part
 372  */
 373 #ifdef CONFIG_TOUCHSCREEN_USB_GUNZE
 374 static int gunze_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 375 {
 376         if (!(pkt[0] & 0x80) || ((pkt[1] | pkt[2] | pkt[3]) & 0x80))
 377                 return 0;
 378
 379         dev->x = ((pkt[0] & 0x1F) << 7) | (pkt[2] & 0x7F);
 380         dev->y = ((pkt[1] & 0x1F) << 7) | (pkt[3] & 0x7F);
 381         dev->touch = pkt[0] & 0x20;
 382
 383         return 1;
 384 }
 385 #endif
 386
 387 /*****************************************************************************
 388  * DMC TSC-10/25 Part
 389  *
 390  * Documentation about the controller and it's protocol can be found at
 391  *   http://www.dmccoltd.com/files/controler/tsc10usb_pi_e.pdf
 392  *   http://www.dmccoltd.com/files/controler/tsc25_usb_e.pdf
 393  */
 394 #ifdef CONFIG_TOUCHSCREEN_USB_DMC_TSC10
 395
 396 /* supported data rates. currently using 130 */
 397 #define TSC10_RATE_POINT        0x50
 398 #define TSC10_RATE_30           0x40
 399 #define TSC10_RATE_50           0x41
 400 #define TSC10_RATE_80           0x42
 401 #define TSC10_RATE_100          0x43
 402 #define TSC10_RATE_130          0x44
 403 #define TSC10_RATE_150          0x45
 404
 405 /* commands */
 406 #define TSC10_CMD_RESET         0x55
 407 #define TSC10_CMD_RATE          0x05
 408 #define TSC10_CMD_DATA1         0x01
 409
 410 static int dmc_tsc10_init(struct usbtouch_usb *usbtouch)
 411 {
 412         struct usb_device *dev = usbtouch->udev;
 413         int ret = -ENOMEM;
 414         unsigned char *buf;
 415
 416         buf = kmalloc(2, GFP_KERNEL);
 417         if (!buf)
 418                 goto err_nobuf;
 419         /* reset */
 420         buf[0] = buf[1] = 0xFF;
 421         ret = usb_control_msg(dev, usb_rcvctrlpipe (dev, 0),
 422                               TSC10_CMD_RESET,
 423                               USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 424                               0, 0, buf, 2, USB_CTRL_SET_TIMEOUT);
 425         if (ret < 0)
 426                 goto err_out;
 427         if (buf[0] != 0x06) {
 428                 ret = -ENODEV;
 429                 goto err_out;
 430         }
 431
 432         /* set coordinate output rate */
 433         buf[0] = buf[1] = 0xFF;
 434         ret = usb_control_msg(dev, usb_rcvctrlpipe (dev, 0),
 435                               TSC10_CMD_RATE,
 436                               USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 437                               TSC10_RATE_150, 0, buf, 2, USB_CTRL_SET_TIMEOUT);
 438         if (ret < 0)
 439                 goto err_out;
 440         if ((buf[0] != 0x06) && (buf[0] != 0x15 || buf[1] != 0x01)) {
 441                 ret = -ENODEV;
 442                 goto err_out;
 443         }
 444
 445         /* start sending data */
 446         ret = usb_control_msg(dev, usb_rcvctrlpipe (dev, 0),
 447                               TSC10_CMD_DATA1,
 448                               USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 449                               0, 0, NULL, 0, USB_CTRL_SET_TIMEOUT);
 450 err_out:
 451         kfree(buf);
 452 err_nobuf:
 453         return ret;
 454 }
 455
 456
 457 static int dmc_tsc10_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 458 {
 459         dev->x = ((pkt[2] & 0x03) << 8) | pkt[1];
 460         dev->y = ((pkt[4] & 0x03) << 8) | pkt[3];
 461         dev->touch = pkt[0] & 0x01;
 462
 463         return 1;
 464 }
 465 #endif
 466
 467
 468 /*****************************************************************************
 469  * IRTOUCH Part
 470  */
 471 #ifdef CONFIG_TOUCHSCREEN_USB_IRTOUCH
 472 static int irtouch_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 473 {
 474         dev->x = (pkt[3] << 8) | pkt[2];
 475         dev->y = (pkt[5] << 8) | pkt[4];
 476         dev->touch = (pkt[1] & 0x03) ? 1 : 0;
 477
 478         return 1;
 479 }
 480 #endif
 481
 482
 483 /*****************************************************************************
 484  * IdealTEK URTC1000 Part
 485  */
 486 #ifdef CONFIG_TOUCHSCREEN_USB_IDEALTEK
 487 #ifndef MULTI_PACKET
 488 #define MULTI_PACKET
 489 #endif
 490 static int idealtek_get_pkt_len(unsigned char *buf, int len)
 491 {
 492         if (buf[0] & 0x80)
 493                 return 5;
 494         if (buf[0] == 0x01)
 495                 return len;
 496         return 0;
 497 }
 498
 499 static int idealtek_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 500 {
 501         switch (pkt[0] & 0x98) {
 502         case 0x88:
 503                 /* touch data in IdealTEK mode */
 504                 dev->x = (pkt[1] << 5) | (pkt[2] >> 2);
 505                 dev->y = (pkt[3] << 5) | (pkt[4] >> 2);
 506                 dev->touch = (pkt[0] & 0x40) ? 1 : 0;
 507                 return 1;
 508
 509         case 0x98:
 510                 /* touch data in MT emulation mode */
 511                 dev->x = (pkt[2] << 5) | (pkt[1] >> 2);
 512                 dev->y = (pkt[4] << 5) | (pkt[3] >> 2);
 513                 dev->touch = (pkt[0] & 0x40) ? 1 : 0;
 514                 return 1;
 515
 516         default:
 517                 return 0;
 518         }
 519 }
 520 #endif
 521
 522 /*****************************************************************************
 523  * General Touch Part
 524  */
 525 #ifdef CONFIG_TOUCHSCREEN_USB_GENERAL_TOUCH
 526 static int general_touch_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 527 {
 528         dev->x = ((pkt[2] & 0x0F) << 8) | pkt[1] ;
 529         dev->y = ((pkt[4] & 0x0F) << 8) | pkt[3] ;
 530         dev->press = pkt[5] & 0xff;
 531         dev->touch = pkt[0] & 0x01;
 532
 533         return 1;
 534 }
 535 #endif
 536
 537 /*****************************************************************************
 538  * GoTop Part
 539  */
 540 #ifdef CONFIG_TOUCHSCREEN_USB_GOTOP
 541 static int gotop_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 542 {
 543         dev->x = ((pkt[1] & 0x38) << 4) | pkt[2];
 544         dev->y = ((pkt[1] & 0x07) << 7) | pkt[3];
 545         dev->touch = pkt[0] & 0x01;
 546         return 1;
 547 }
 548 #endif
 549
 550
 551 /*****************************************************************************
 552  * the different device descriptors
 553  */
 554 #ifdef MULTI_PACKET
 555 static void usbtouch_process_multi(struct usbtouch_usb *usbtouch,
 556                                    unsigned char *pkt, int len);
 557 #endif
 558
 559 static struct usbtouch_device_info usbtouch_dev_info[] = {
 560 #ifdef CONFIG_TOUCHSCREEN_USB_EGALAX
 561         [DEVTYPE_EGALAX] = {
 562                 .min_xc         = 0x0,
 563                 .max_xc         = 0x07ff,
 564                 .min_yc         = 0x0,
 565                 .max_yc         = 0x07ff,
 566                 .rept_size      = 16,
 567                 .process_pkt    = usbtouch_process_multi,
 568                 .get_pkt_len    = egalax_get_pkt_len,
 569                 .read_data      = egalax_read_data,
 570         },
 571 #endif
 572
 573 #ifdef CONFIG_TOUCHSCREEN_USB_PANJIT
 574         [DEVTYPE_PANJIT] = {
 575                 .min_xc         = 0x0,
 576                 .max_xc         = 0x0fff,
 577                 .min_yc         = 0x0,
 578                 .max_yc         = 0x0fff,
 579                 .rept_size      = 8,
 580                 .read_data      = panjit_read_data,
 581         },
 582 #endif
 583
 584 #ifdef CONFIG_TOUCHSCREEN_USB_3M
 585         [DEVTYPE_3M] = {
 586                 .min_xc         = 0x0,
 587                 .max_xc         = 0x4000,
 588                 .min_yc         = 0x0,
 589                 .max_yc         = 0x4000,
 590                 .rept_size      = 11,
 591                 .read_data      = mtouch_read_data,
 592                 .init           = mtouch_init,
 593         },
 594 #endif
 595
 596 #ifdef CONFIG_TOUCHSCREEN_USB_ITM
 597         [DEVTYPE_ITM] = {
 598                 .min_xc         = 0x0,
 599                 .max_xc         = 0x0fff,
 600                 .min_yc         = 0x0,
 601                 .max_yc         = 0x0fff,
 602                 .max_press      = 0xff,
 603                 .rept_size      = 8,
 604                 .read_data      = itm_read_data,
 605         },
 606 #endif
 607
 608 #ifdef CONFIG_TOUCHSCREEN_USB_ETURBO
 609         [DEVTYPE_ETURBO] = {
 610                 .min_xc         = 0x0,
 611                 .max_xc         = 0x07ff,
 612                 .min_yc         = 0x0,
 613                 .max_yc         = 0x07ff,
 614                 .rept_size      = 8,
 615                 .process_pkt    = usbtouch_process_multi,
 616                 .get_pkt_len    = eturbo_get_pkt_len,
 617                 .read_data      = eturbo_read_data,
 618         },
 619 #endif
 620
 621 #ifdef CONFIG_TOUCHSCREEN_USB_GUNZE
 622         [DEVTYPE_GUNZE] = {
 623                 .min_xc         = 0x0,
 624                 .max_xc         = 0x0fff,
 625                 .min_yc         = 0x0,
 626                 .max_yc         = 0x0fff,
 627                 .rept_size      = 4,
 628                 .read_data      = gunze_read_data,
 629         },
 630 #endif
 631
 632 #ifdef CONFIG_TOUCHSCREEN_USB_DMC_TSC10
 633         [DEVTYPE_DMC_TSC10] = {
 634                 .min_xc         = 0x0,
 635                 .max_xc         = 0x03ff,
 636                 .min_yc         = 0x0,
 637                 .max_yc         = 0x03ff,
 638                 .rept_size      = 5,
 639                 .init           = dmc_tsc10_init,
 640                 .read_data      = dmc_tsc10_read_data,
 641         },
 642 #endif
 643
 644 #ifdef CONFIG_TOUCHSCREEN_USB_IRTOUCH
 645         [DEVTYPE_IRTOUCH] = {
 646                 .min_xc         = 0x0,
 647                 .max_xc         = 0x0fff,
 648                 .min_yc         = 0x0,
 649                 .max_yc         = 0x0fff,
 650                 .rept_size      = 8,
 651                 .read_data      = irtouch_read_data,
 652         },
 653 #endif
 654
 655 #ifdef CONFIG_TOUCHSCREEN_USB_IDEALTEK
 656         [DEVTYPE_IDEALTEK] = {
 657                 .min_xc         = 0x0,
 658                 .max_xc         = 0x0fff,
 659                 .min_yc         = 0x0,
 660                 .max_yc         = 0x0fff,
 661                 .rept_size      = 8,
 662                 .process_pkt    = usbtouch_process_multi,
 663                 .get_pkt_len    = idealtek_get_pkt_len,
 664                 .read_data      = idealtek_read_data,
 665         },
 666 #endif
 667
 668 #ifdef CONFIG_TOUCHSCREEN_USB_GENERAL_TOUCH
 669         [DEVTYPE_GENERAL_TOUCH] = {
 670                 .min_xc         = 0x0,
 671                 .max_xc         = 0x0500,
 672                 .min_yc         = 0x0,
 673                 .max_yc         = 0x0500,
 674                 .rept_size      = 7,
 675                 .read_data      = general_touch_read_data,
 676         },
 677 #endif
 678
 679 #ifdef CONFIG_TOUCHSCREEN_USB_GOTOP
 680         [DEVTYPE_GOTOP] = {
 681                 .min_xc         = 0x0,
 682                 .max_xc         = 0x03ff,
 683                 .min_yc         = 0x0,
 684                 .max_yc         = 0x03ff,
 685                 .rept_size      = 4,
 686                 .read_data      = gotop_read_data,
 687         },
 688 #endif
 689 };
 690
 691
 692 /*****************************************************************************
 693  * Generic Part
 694  */
 695 static void usbtouch_process_pkt(struct usbtouch_usb *usbtouch,
 696                                  unsigned char *pkt, int len)
 697 {
 698         struct usbtouch_device_info *type = usbtouch->type;
 699
 700         if (!type->read_data(usbtouch, pkt))
 701                         return;
 702
 703         input_report_key(usbtouch->input, BTN_TOUCH, usbtouch->touch);
 704
 705         if (swap_xy) {
 706                 input_report_abs(usbtouch->input, ABS_X, usbtouch->y);
 707                 input_report_abs(usbtouch->input, ABS_Y, usbtouch->x);
 708         } else {
 709                 input_report_abs(usbtouch->input, ABS_X, usbtouch->x);
 710                 input_report_abs(usbtouch->input, ABS_Y, usbtouch->y);
 711         }
 712         if (type->max_press)
 713                 input_report_abs(usbtouch->input, ABS_PRESSURE, usbtouch->press);
 714         input_sync(usbtouch->input);
 715 }
 716
 717
 718 #ifdef MULTI_PACKET
 719 static void usbtouch_process_multi(struct usbtouch_usb *usbtouch,
 720                                    unsigned char *pkt, int len)
 721 {
 722         unsigned char *buffer;
 723         int pkt_len, pos, buf_len, tmp;
 724
 725         /* process buffer */
 726         if (unlikely(usbtouch->buf_len)) {
 727                 /* try to get size */
 728                 pkt_len = usbtouch->type->get_pkt_len(
 729                                 usbtouch->buffer, usbtouch->buf_len);
 730
 731                 /* drop? */
 732                 if (unlikely(!pkt_len))
 733                         goto out_flush_buf;
 734
 735                 /* need to append -pkt_len bytes before able to get size */
 736                 if (unlikely(pkt_len < 0)) {
 737                         int append = -pkt_len;
 738                         if (unlikely(append > len))
 739                                append = len;
 740                         if (usbtouch->buf_len + append >= usbtouch->type->rept_size)
 741                                 goto out_flush_buf;
 742                         memcpy(usbtouch->buffer + usbtouch->buf_len, pkt, append);
 743                         usbtouch->buf_len += append;
 744
 745                         pkt_len = usbtouch->type->get_pkt_len(
 746                                         usbtouch->buffer, usbtouch->buf_len);
 747                         if (pkt_len < 0)
 748                                 return;
 749                 }
 750
 751                 /* append */
 752                 tmp = pkt_len - usbtouch->buf_len;
 753                 if (usbtouch->buf_len + tmp >= usbtouch->type->rept_size)
 754                         goto out_flush_buf;
 755                 memcpy(usbtouch->buffer + usbtouch->buf_len, pkt, tmp);
 756                 usbtouch_process_pkt(usbtouch, usbtouch->buffer, pkt_len);
 757
 758                 buffer = pkt + tmp;
 759                 buf_len = len - tmp;
 760         } else {
 761                 buffer = pkt;
 762                 buf_len = len;
 763         }
 764
 765         /* loop over the received packet, process */
 766         pos = 0;
 767         while (pos < buf_len) {
 768                 /* get packet len */
 769                 pkt_len = usbtouch->type->get_pkt_len(buffer + pos,
 770                                                         buf_len - pos);
 771
 772                 /* unknown packet: skip one byte */
 773                 if (unlikely(!pkt_len)) {
 774                         pos++;
 775                         continue;
 776                 }
 777
 778                 /* full packet: process */
 779                 if (likely((pkt_len > 0) && (pkt_len <= buf_len - pos))) {
 780                         usbtouch_process_pkt(usbtouch, buffer + pos, pkt_len);
 781                 } else {
 782                         /* incomplete packet: save in buffer */
 783                         memcpy(usbtouch->buffer, buffer + pos, buf_len - pos);
 784                         usbtouch->buf_len = buf_len - pos;
 785                         return;
 786                 }
 787                 pos += pkt_len;
 788         }
 789
 790 out_flush_buf:
 791         usbtouch->buf_len = 0;
 792         return;
 793 }
 794 #endif
 795
 796
 797 static void usbtouch_irq(struct urb *urb)
 798 {
 799         struct usbtouch_usb *usbtouch = urb->context;
 800         int retval;
 801
 802         switch (urb->status) {
 803         case 0:
 804                 /* success */
 805                 break;
 806         case -ETIME:
 807                 /* this urb is timing out */
 808                 dbg("%s - urb timed out - was the device unplugged?",
 809                     __func__);
 810                 return;
 811         case -ECONNRESET:
 812         case -ENOENT:
 813         case -ESHUTDOWN:
 814                 /* this urb is terminated, clean up */
 815                 dbg("%s - urb shutting down with status: %d",
 816                     __func__, urb->status);
 817                 return;
 818         default:
 819                 dbg("%s - nonzero urb status received: %d",
 820                     __func__, urb->status);
 821                 goto exit;
 822         }
 823
 824         usbtouch->type->process_pkt(usbtouch, usbtouch->data, urb->actual_length);
 825
 826 exit:
 827         retval = usb_submit_urb(urb, GFP_ATOMIC);
 828         if (retval)
 829                 err("%s - usb_submit_urb failed with result: %d",
 830                     __func__, retval);
 831 }
 832
 833 static int usbtouch_open(struct input_dev *input)
 834 {
 835         struct usbtouch_usb *usbtouch = input_get_drvdata(input);
 836
 837         usbtouch->irq->dev = usbtouch->udev;
 838
 839         if (usb_submit_urb(usbtouch->irq, GFP_KERNEL))
 840                 return -EIO;
 841
 842         return 0;
 843 }
 844
 845 static void usbtouch_close(struct input_dev *input)
 846 {
 847         struct usbtouch_usb *usbtouch = input_get_drvdata(input);
 848
 849         usb_kill_urb(usbtouch->irq);
 850 }
 851
 852
 853 static void usbtouch_free_buffers(struct usb_device *udev,
 854                                   struct usbtouch_usb *usbtouch)
 855 {
 856         usb_buffer_free(udev, usbtouch->type->rept_size,
 857                         usbtouch->data, usbtouch->data_dma);
 858         kfree(usbtouch->buffer);
 859 }
 860
 861
 862 static int usbtouch_probe(struct usb_interface *intf,
 863                           const struct usb_device_id *id)
 864 {
 865         struct usbtouch_usb *usbtouch;
 866         struct input_dev *input_dev;
 867         struct usb_host_interface *interface;
 868         struct usb_endpoint_descriptor *endpoint;
 869         struct usb_device *udev = interface_to_usbdev(intf);
 870         struct usbtouch_device_info *type;
 871         int err = -ENOMEM;
 872
 873         /* some devices are ignored */
 874         if (id->driver_info == DEVTYPE_IGNORE)
 875                 return -ENODEV;
 876
 877         interface = intf->cur_altsetting;
 878         endpoint = &interface->endpoint[0].desc;
 879
 880         usbtouch = kzalloc(sizeof(struct usbtouch_usb), GFP_KERNEL);
 881         input_dev = input_allocate_device();
 882         if (!usbtouch || !input_dev)
 883                 goto out_free;
 884
 885         type = &usbtouch_dev_info[id->driver_info];
 886         usbtouch->type = type;
 887         if (!type->process_pkt)
 888                 type->process_pkt = usbtouch_process_pkt;
 889
 890         usbtouch->data = usb_buffer_alloc(udev, type->rept_size,
 891                                           GFP_KERNEL, &usbtouch->data_dma);
 892         if (!usbtouch->data)
 893                 goto out_free;
 894
 895         if (type->get_pkt_len) {
 896                 usbtouch->buffer = kmalloc(type->rept_size, GFP_KERNEL);
 897                 if (!usbtouch->buffer)
 898                         goto out_free_buffers;
 899         }
 900
 901         usbtouch->irq = usb_alloc_urb(0, GFP_KERNEL);
 902         if (!usbtouch->irq) {
 903                 dbg("%s - usb_alloc_urb failed: usbtouch->irq", __func__);
 904                 goto out_free_buffers;
 905         }
 906
 907         usbtouch->udev = udev;
 908         usbtouch->input = input_dev;
 909
 910         if (udev->manufacturer)
 911                 strlcpy(usbtouch->name, udev->manufacturer, sizeof(usbtouch->name));
 912
 913         if (udev->product) {
 914                 if (udev->manufacturer)
 915                         strlcat(usbtouch->name, " ", sizeof(usbtouch->name));
 916                 strlcat(usbtouch->name, udev->product, sizeof(usbtouch->name));
 917         }
 918
 919         if (!strlen(usbtouch->name))
 920                 snprintf(usbtouch->name, sizeof(usbtouch->name),
 921                         "USB Touchscreen %04x:%04x",
 922                          le16_to_cpu(udev->descriptor.idVendor),
 923                          le16_to_cpu(udev->descriptor.idProduct));
 924
 925         usb_make_path(udev, usbtouch->phys, sizeof(usbtouch->phys));
 926         strlcat(usbtouch->phys, "/input0", sizeof(usbtouch->phys));
 927
 928         input_dev->name = usbtouch->name;
 929         input_dev->phys = usbtouch->phys;
 930         usb_to_input_id(udev, &input_dev->id);
 931         input_dev->dev.parent = &intf->dev;
 932
 933         input_set_drvdata(input_dev, usbtouch);
 934
 935         input_dev->open = usbtouch_open;
 936         input_dev->close = usbtouch_close;
 937
 938         input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
 939         input_dev->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH);
 940         input_set_abs_params(input_dev, ABS_X, type->min_xc, type->max_xc, 0, 0);
 941         input_set_abs_params(input_dev, ABS_Y, type->min_yc, type->max_yc, 0, 0);
 942         if (type->max_press)
 943                 input_set_abs_params(input_dev, ABS_PRESSURE, type->min_press,
 944                                      type->max_press, 0, 0);
 945
 946         usb_fill_int_urb(usbtouch->irq, usbtouch->udev,
 947                          usb_rcvintpipe(usbtouch->udev, endpoint->bEndpointAddress),
 948                          usbtouch->data, type->rept_size,
 949                          usbtouch_irq, usbtouch, endpoint->bInterval);
 950
 951         usbtouch->irq->dev = usbtouch->udev;
 952         usbtouch->irq->transfer_dma = usbtouch->data_dma;
 953         usbtouch->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
 954
 955         /* device specific init */
 956         if (type->init) {
 957                 err = type->init(usbtouch);
 958                 if (err) {
 959                         dbg("%s - type->init() failed, err: %d", __func__, err);
 960                         goto out_free_buffers;
 961                 }
 962         }
 963
 964         err = input_register_device(usbtouch->input);
 965         if (err) {
 966                 dbg("%s - input_register_device failed, err: %d", __func__, err);
 967                 goto out_free_buffers;
 968         }
 969
 970         usb_set_intfdata(intf, usbtouch);
 971
 972         return 0;
 973
 974 out_free_buffers:
 975         usbtouch_free_buffers(udev, usbtouch);
 976 out_free:
 977         input_free_device(input_dev);
 978         kfree(usbtouch);
 979         return err;
 980 }
 981
 982 static void usbtouch_disconnect(struct usb_interface *intf)
 983 {
 984         struct usbtouch_usb *usbtouch = usb_get_intfdata(intf);
 985
 986         dbg("%s - called", __func__);
 987
 988         if (!usbtouch)
 989                 return;
 990
 991         dbg("%s - usbtouch is initialized, cleaning up", __func__);
 992         usb_set_intfdata(intf, NULL);
 993         usb_kill_urb(usbtouch->irq);
 994         input_unregister_device(usbtouch->input);
 995         usb_free_urb(usbtouch->irq);
 996         usbtouch_free_buffers(interface_to_usbdev(intf), usbtouch);
 997         kfree(usbtouch);
 998 }
 999
1000 MODULE_DEVICE_TABLE(usb, usbtouch_devices);
1001
1002 static struct usb_driver usbtouch_driver = {
1003         .name           = "usbtouchscreen",
1004         .probe          = usbtouch_probe,
1005         .disconnect     = usbtouch_disconnect,
1006         .id_table       = usbtouch_devices,
1007 };
1008
1009 static int __init usbtouch_init(void)
1010 {
1011         return usb_register(&usbtouch_driver);
1012 }
1013
1014 static void __exit usbtouch_cleanup(void)
1015 {
1016         usb_deregister(&usbtouch_driver);
1017 }
1018
1019 module_init(usbtouch_init);
1020 module_exit(usbtouch_cleanup);
1021
1022 MODULE_AUTHOR(DRIVER_AUTHOR);
1023 MODULE_DESCRIPTION(DRIVER_DESC);
1024 MODULE_LICENSE("GPL");
1025
1026 MODULE_ALIAS("touchkitusb");
1027 MODULE_ALIAS("itmtouch");
1028 MODULE_ALIAS("mtouchusb");