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