usbtouchscreen.c revision 4aa5bbeca0fe561181e8fba089cd96e449ee5fca
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 (*init) (struct usbtouch_usb *usbtouch); 99 void (*exit) (struct usbtouch_usb *usbtouch); 100}; 101 102/* a usbtouch device */ 103struct usbtouch_usb { 104 unsigned char *data; 105 dma_addr_t data_dma; 106 unsigned char *buffer; 107 int buf_len; 108 struct urb *irq; 109 struct usb_interface *interface; 110 struct input_dev *input; 111 struct usbtouch_device_info *type; 112 char name[128]; 113 char phys[64]; 114 void *priv; 115 116 int x, y; 117 int touch, press; 118}; 119 120 121/* device types */ 122enum { 123 DEVTYPE_IGNORE = -1, 124 DEVTYPE_EGALAX, 125 DEVTYPE_PANJIT, 126 DEVTYPE_3M, 127 DEVTYPE_ITM, 128 DEVTYPE_ETURBO, 129 DEVTYPE_GUNZE, 130 DEVTYPE_DMC_TSC10, 131 DEVTYPE_IRTOUCH, 132 DEVTYPE_IDEALTEK, 133 DEVTYPE_GENERAL_TOUCH, 134 DEVTYPE_GOTOP, 135 DEVTYPE_JASTEC, 136 DEVTYPE_E2I, 137 DEVTYPE_ZYTRONIC, 138 DEVTYPE_TC5UH, 139 DEVTYPE_NEXIO, 140}; 141 142#define USB_DEVICE_HID_CLASS(vend, prod) \ 143 .match_flags = USB_DEVICE_ID_MATCH_INT_CLASS \ 144 | USB_DEVICE_ID_MATCH_INT_PROTOCOL \ 145 | USB_DEVICE_ID_MATCH_DEVICE, \ 146 .idVendor = (vend), \ 147 .idProduct = (prod), \ 148 .bInterfaceClass = USB_INTERFACE_CLASS_HID, \ 149 .bInterfaceProtocol = USB_INTERFACE_PROTOCOL_MOUSE 150 151static const struct usb_device_id usbtouch_devices[] = { 152#ifdef CONFIG_TOUCHSCREEN_USB_EGALAX 153 /* ignore the HID capable devices, handled by usbhid */ 154 {USB_DEVICE_HID_CLASS(0x0eef, 0x0001), .driver_info = DEVTYPE_IGNORE}, 155 {USB_DEVICE_HID_CLASS(0x0eef, 0x0002), .driver_info = DEVTYPE_IGNORE}, 156 157 /* normal device IDs */ 158 {USB_DEVICE(0x3823, 0x0001), .driver_info = DEVTYPE_EGALAX}, 159 {USB_DEVICE(0x3823, 0x0002), .driver_info = DEVTYPE_EGALAX}, 160 {USB_DEVICE(0x0123, 0x0001), .driver_info = DEVTYPE_EGALAX}, 161 {USB_DEVICE(0x0eef, 0x0001), .driver_info = DEVTYPE_EGALAX}, 162 {USB_DEVICE(0x0eef, 0x0002), .driver_info = DEVTYPE_EGALAX}, 163 {USB_DEVICE(0x1234, 0x0001), .driver_info = DEVTYPE_EGALAX}, 164 {USB_DEVICE(0x1234, 0x0002), .driver_info = DEVTYPE_EGALAX}, 165#endif 166 167#ifdef CONFIG_TOUCHSCREEN_USB_PANJIT 168 {USB_DEVICE(0x134c, 0x0001), .driver_info = DEVTYPE_PANJIT}, 169 {USB_DEVICE(0x134c, 0x0002), .driver_info = DEVTYPE_PANJIT}, 170 {USB_DEVICE(0x134c, 0x0003), .driver_info = DEVTYPE_PANJIT}, 171 {USB_DEVICE(0x134c, 0x0004), .driver_info = DEVTYPE_PANJIT}, 172#endif 173 174#ifdef CONFIG_TOUCHSCREEN_USB_3M 175 {USB_DEVICE(0x0596, 0x0001), .driver_info = DEVTYPE_3M}, 176#endif 177 178#ifdef CONFIG_TOUCHSCREEN_USB_ITM 179 {USB_DEVICE(0x0403, 0xf9e9), .driver_info = DEVTYPE_ITM}, 180#endif 181 182#ifdef CONFIG_TOUCHSCREEN_USB_ETURBO 183 {USB_DEVICE(0x1234, 0x5678), .driver_info = DEVTYPE_ETURBO}, 184#endif 185 186#ifdef CONFIG_TOUCHSCREEN_USB_GUNZE 187 {USB_DEVICE(0x0637, 0x0001), .driver_info = DEVTYPE_GUNZE}, 188#endif 189 190#ifdef CONFIG_TOUCHSCREEN_USB_DMC_TSC10 191 {USB_DEVICE(0x0afa, 0x03e8), .driver_info = DEVTYPE_DMC_TSC10}, 192#endif 193 194#ifdef CONFIG_TOUCHSCREEN_USB_IRTOUCH 195 {USB_DEVICE(0x595a, 0x0001), .driver_info = DEVTYPE_IRTOUCH}, 196 {USB_DEVICE(0x6615, 0x0001), .driver_info = DEVTYPE_IRTOUCH}, 197#endif 198 199#ifdef CONFIG_TOUCHSCREEN_USB_IDEALTEK 200 {USB_DEVICE(0x1391, 0x1000), .driver_info = DEVTYPE_IDEALTEK}, 201#endif 202 203#ifdef CONFIG_TOUCHSCREEN_USB_GENERAL_TOUCH 204 {USB_DEVICE(0x0dfc, 0x0001), .driver_info = DEVTYPE_GENERAL_TOUCH}, 205#endif 206 207#ifdef CONFIG_TOUCHSCREEN_USB_GOTOP 208 {USB_DEVICE(0x08f2, 0x007f), .driver_info = DEVTYPE_GOTOP}, 209 {USB_DEVICE(0x08f2, 0x00ce), .driver_info = DEVTYPE_GOTOP}, 210 {USB_DEVICE(0x08f2, 0x00f4), .driver_info = DEVTYPE_GOTOP}, 211#endif 212 213#ifdef CONFIG_TOUCHSCREEN_USB_JASTEC 214 {USB_DEVICE(0x0f92, 0x0001), .driver_info = DEVTYPE_JASTEC}, 215#endif 216 217#ifdef CONFIG_TOUCHSCREEN_USB_E2I 218 {USB_DEVICE(0x1ac7, 0x0001), .driver_info = DEVTYPE_E2I}, 219#endif 220 221#ifdef CONFIG_TOUCHSCREEN_USB_ZYTRONIC 222 {USB_DEVICE(0x14c8, 0x0003), .driver_info = DEVTYPE_ZYTRONIC}, 223#endif 224 225#ifdef CONFIG_TOUCHSCREEN_USB_ETT_TC5UH 226 {USB_DEVICE(0x0664, 0x0309), .driver_info = DEVTYPE_TC5UH}, 227#endif 228 229#ifdef CONFIG_TOUCHSCREEN_USB_NEXIO 230 /* data interface only */ 231 {USB_DEVICE_AND_INTERFACE_INFO(0x10f0, 0x2002, 0x0a, 0x00, 0x00), 232 .driver_info = DEVTYPE_NEXIO}, 233 {USB_DEVICE_AND_INTERFACE_INFO(0x1870, 0x0001, 0x0a, 0x00, 0x00), 234 .driver_info = DEVTYPE_NEXIO}, 235#endif 236 237 {} 238}; 239 240 241/***************************************************************************** 242 * e2i Part 243 */ 244 245#ifdef CONFIG_TOUCHSCREEN_USB_E2I 246static int e2i_init(struct usbtouch_usb *usbtouch) 247{ 248 int ret; 249 struct usb_device *udev = interface_to_usbdev(usbtouch->interface); 250 251 ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0), 252 0x01, 0x02, 0x0000, 0x0081, 253 NULL, 0, USB_CTRL_SET_TIMEOUT); 254 255 dbg("%s - usb_control_msg - E2I_RESET - bytes|err: %d", 256 __func__, ret); 257 return ret; 258} 259 260static int e2i_read_data(struct usbtouch_usb *dev, unsigned char *pkt) 261{ 262 int tmp = (pkt[0] << 8) | pkt[1]; 263 dev->x = (pkt[2] << 8) | pkt[3]; 264 dev->y = (pkt[4] << 8) | pkt[5]; 265 266 tmp = tmp - 0xA000; 267 dev->touch = (tmp > 0); 268 dev->press = (tmp > 0 ? tmp : 0); 269 270 return 1; 271} 272#endif 273 274 275/***************************************************************************** 276 * eGalax part 277 */ 278 279#ifdef CONFIG_TOUCHSCREEN_USB_EGALAX 280 281#ifndef MULTI_PACKET 282#define MULTI_PACKET 283#endif 284 285#define EGALAX_PKT_TYPE_MASK 0xFE 286#define EGALAX_PKT_TYPE_REPT 0x80 287#define EGALAX_PKT_TYPE_DIAG 0x0A 288 289static int egalax_read_data(struct usbtouch_usb *dev, unsigned char *pkt) 290{ 291 if ((pkt[0] & EGALAX_PKT_TYPE_MASK) != EGALAX_PKT_TYPE_REPT) 292 return 0; 293 294 dev->x = ((pkt[3] & 0x0F) << 7) | (pkt[4] & 0x7F); 295 dev->y = ((pkt[1] & 0x0F) << 7) | (pkt[2] & 0x7F); 296 dev->touch = pkt[0] & 0x01; 297 298 return 1; 299} 300 301static int egalax_get_pkt_len(unsigned char *buf, int len) 302{ 303 switch (buf[0] & EGALAX_PKT_TYPE_MASK) { 304 case EGALAX_PKT_TYPE_REPT: 305 return 5; 306 307 case EGALAX_PKT_TYPE_DIAG: 308 if (len < 2) 309 return -1; 310 311 return buf[1] + 2; 312 } 313 314 return 0; 315} 316#endif 317 318 319/***************************************************************************** 320 * PanJit Part 321 */ 322#ifdef CONFIG_TOUCHSCREEN_USB_PANJIT 323static int panjit_read_data(struct usbtouch_usb *dev, unsigned char *pkt) 324{ 325 dev->x = ((pkt[2] & 0x0F) << 8) | pkt[1]; 326 dev->y = ((pkt[4] & 0x0F) << 8) | pkt[3]; 327 dev->touch = pkt[0] & 0x01; 328 329 return 1; 330} 331#endif 332 333 334/***************************************************************************** 335 * 3M/Microtouch Part 336 */ 337#ifdef CONFIG_TOUCHSCREEN_USB_3M 338 339#define MTOUCHUSB_ASYNC_REPORT 1 340#define MTOUCHUSB_RESET 7 341#define MTOUCHUSB_REQ_CTRLLR_ID 10 342 343static int mtouch_read_data(struct usbtouch_usb *dev, unsigned char *pkt) 344{ 345 if (hwcalib_xy) { 346 dev->x = (pkt[4] << 8) | pkt[3]; 347 dev->y = 0xffff - ((pkt[6] << 8) | pkt[5]); 348 } else { 349 dev->x = (pkt[8] << 8) | pkt[7]; 350 dev->y = (pkt[10] << 8) | pkt[9]; 351 } 352 dev->touch = (pkt[2] & 0x40) ? 1 : 0; 353 354 return 1; 355} 356 357static int mtouch_init(struct usbtouch_usb *usbtouch) 358{ 359 int ret, i; 360 struct usb_device *udev = interface_to_usbdev(usbtouch->interface); 361 362 ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0), 363 MTOUCHUSB_RESET, 364 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE, 365 1, 0, NULL, 0, USB_CTRL_SET_TIMEOUT); 366 dbg("%s - usb_control_msg - MTOUCHUSB_RESET - bytes|err: %d", 367 __func__, ret); 368 if (ret < 0) 369 return ret; 370 msleep(150); 371 372 for (i = 0; i < 3; i++) { 373 ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0), 374 MTOUCHUSB_ASYNC_REPORT, 375 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE, 376 1, 1, NULL, 0, USB_CTRL_SET_TIMEOUT); 377 dbg("%s - usb_control_msg - MTOUCHUSB_ASYNC_REPORT - bytes|err: %d", 378 __func__, ret); 379 if (ret >= 0) 380 break; 381 if (ret != -EPIPE) 382 return ret; 383 } 384 385 /* Default min/max xy are the raw values, override if using hw-calib */ 386 if (hwcalib_xy) { 387 input_set_abs_params(usbtouch->input, ABS_X, 0, 0xffff, 0, 0); 388 input_set_abs_params(usbtouch->input, ABS_Y, 0, 0xffff, 0, 0); 389 } 390 391 return 0; 392} 393#endif 394 395 396/***************************************************************************** 397 * ITM Part 398 */ 399#ifdef CONFIG_TOUCHSCREEN_USB_ITM 400static int itm_read_data(struct usbtouch_usb *dev, unsigned char *pkt) 401{ 402 int touch; 403 /* 404 * ITM devices report invalid x/y data if not touched. 405 * if the screen was touched before but is not touched any more 406 * report touch as 0 with the last valid x/y data once. then stop 407 * reporting data until touched again. 408 */ 409 dev->press = ((pkt[2] & 0x01) << 7) | (pkt[5] & 0x7F); 410 411 touch = ~pkt[7] & 0x20; 412 if (!touch) { 413 if (dev->touch) { 414 dev->touch = 0; 415 return 1; 416 } 417 418 return 0; 419 } 420 421 dev->x = ((pkt[0] & 0x1F) << 7) | (pkt[3] & 0x7F); 422 dev->y = ((pkt[1] & 0x1F) << 7) | (pkt[4] & 0x7F); 423 dev->touch = touch; 424 425 return 1; 426} 427#endif 428 429 430/***************************************************************************** 431 * eTurboTouch part 432 */ 433#ifdef CONFIG_TOUCHSCREEN_USB_ETURBO 434#ifndef MULTI_PACKET 435#define MULTI_PACKET 436#endif 437static int eturbo_read_data(struct usbtouch_usb *dev, unsigned char *pkt) 438{ 439 unsigned int shift; 440 441 /* packets should start with sync */ 442 if (!(pkt[0] & 0x80)) 443 return 0; 444 445 shift = (6 - (pkt[0] & 0x03)); 446 dev->x = ((pkt[3] << 7) | pkt[4]) >> shift; 447 dev->y = ((pkt[1] << 7) | pkt[2]) >> shift; 448 dev->touch = (pkt[0] & 0x10) ? 1 : 0; 449 450 return 1; 451} 452 453static int eturbo_get_pkt_len(unsigned char *buf, int len) 454{ 455 if (buf[0] & 0x80) 456 return 5; 457 if (buf[0] == 0x01) 458 return 3; 459 return 0; 460} 461#endif 462 463 464/***************************************************************************** 465 * Gunze part 466 */ 467#ifdef CONFIG_TOUCHSCREEN_USB_GUNZE 468static int gunze_read_data(struct usbtouch_usb *dev, unsigned char *pkt) 469{ 470 if (!(pkt[0] & 0x80) || ((pkt[1] | pkt[2] | pkt[3]) & 0x80)) 471 return 0; 472 473 dev->x = ((pkt[0] & 0x1F) << 7) | (pkt[2] & 0x7F); 474 dev->y = ((pkt[1] & 0x1F) << 7) | (pkt[3] & 0x7F); 475 dev->touch = pkt[0] & 0x20; 476 477 return 1; 478} 479#endif 480 481/***************************************************************************** 482 * DMC TSC-10/25 Part 483 * 484 * Documentation about the controller and it's protocol can be found at 485 * http://www.dmccoltd.com/files/controler/tsc10usb_pi_e.pdf 486 * http://www.dmccoltd.com/files/controler/tsc25_usb_e.pdf 487 */ 488#ifdef CONFIG_TOUCHSCREEN_USB_DMC_TSC10 489 490/* supported data rates. currently using 130 */ 491#define TSC10_RATE_POINT 0x50 492#define TSC10_RATE_30 0x40 493#define TSC10_RATE_50 0x41 494#define TSC10_RATE_80 0x42 495#define TSC10_RATE_100 0x43 496#define TSC10_RATE_130 0x44 497#define TSC10_RATE_150 0x45 498 499/* commands */ 500#define TSC10_CMD_RESET 0x55 501#define TSC10_CMD_RATE 0x05 502#define TSC10_CMD_DATA1 0x01 503 504static int dmc_tsc10_init(struct usbtouch_usb *usbtouch) 505{ 506 struct usb_device *dev = interface_to_usbdev(usbtouch->interface); 507 int ret = -ENOMEM; 508 unsigned char *buf; 509 510 buf = kmalloc(2, GFP_KERNEL); 511 if (!buf) 512 goto err_nobuf; 513 /* reset */ 514 buf[0] = buf[1] = 0xFF; 515 ret = usb_control_msg(dev, usb_rcvctrlpipe (dev, 0), 516 TSC10_CMD_RESET, 517 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE, 518 0, 0, buf, 2, USB_CTRL_SET_TIMEOUT); 519 if (ret < 0) 520 goto err_out; 521 if (buf[0] != 0x06) { 522 ret = -ENODEV; 523 goto err_out; 524 } 525 526 /* set coordinate output rate */ 527 buf[0] = buf[1] = 0xFF; 528 ret = usb_control_msg(dev, usb_rcvctrlpipe (dev, 0), 529 TSC10_CMD_RATE, 530 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE, 531 TSC10_RATE_150, 0, buf, 2, USB_CTRL_SET_TIMEOUT); 532 if (ret < 0) 533 goto err_out; 534 if ((buf[0] != 0x06) && (buf[0] != 0x15 || buf[1] != 0x01)) { 535 ret = -ENODEV; 536 goto err_out; 537 } 538 539 /* start sending data */ 540 ret = usb_control_msg(dev, usb_rcvctrlpipe (dev, 0), 541 TSC10_CMD_DATA1, 542 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE, 543 0, 0, NULL, 0, USB_CTRL_SET_TIMEOUT); 544err_out: 545 kfree(buf); 546err_nobuf: 547 return ret; 548} 549 550 551static int dmc_tsc10_read_data(struct usbtouch_usb *dev, unsigned char *pkt) 552{ 553 dev->x = ((pkt[2] & 0x03) << 8) | pkt[1]; 554 dev->y = ((pkt[4] & 0x03) << 8) | pkt[3]; 555 dev->touch = pkt[0] & 0x01; 556 557 return 1; 558} 559#endif 560 561 562/***************************************************************************** 563 * IRTOUCH Part 564 */ 565#ifdef CONFIG_TOUCHSCREEN_USB_IRTOUCH 566static int irtouch_read_data(struct usbtouch_usb *dev, unsigned char *pkt) 567{ 568 dev->x = (pkt[3] << 8) | pkt[2]; 569 dev->y = (pkt[5] << 8) | pkt[4]; 570 dev->touch = (pkt[1] & 0x03) ? 1 : 0; 571 572 return 1; 573} 574#endif 575 576/***************************************************************************** 577 * ET&T TC5UH part 578 */ 579#ifdef CONFIG_TOUCHSCREEN_USB_ETT_TC5UH 580static int tc5uh_read_data(struct usbtouch_usb *dev, unsigned char *pkt) 581{ 582 dev->x = ((pkt[2] & 0x0F) << 8) | pkt[1]; 583 dev->y = ((pkt[4] & 0x0F) << 8) | pkt[3]; 584 dev->touch = pkt[0] & 0x01; 585 586 return 1; 587} 588#endif 589 590/***************************************************************************** 591 * IdealTEK URTC1000 Part 592 */ 593#ifdef CONFIG_TOUCHSCREEN_USB_IDEALTEK 594#ifndef MULTI_PACKET 595#define MULTI_PACKET 596#endif 597static int idealtek_get_pkt_len(unsigned char *buf, int len) 598{ 599 if (buf[0] & 0x80) 600 return 5; 601 if (buf[0] == 0x01) 602 return len; 603 return 0; 604} 605 606static int idealtek_read_data(struct usbtouch_usb *dev, unsigned char *pkt) 607{ 608 switch (pkt[0] & 0x98) { 609 case 0x88: 610 /* touch data in IdealTEK mode */ 611 dev->x = (pkt[1] << 5) | (pkt[2] >> 2); 612 dev->y = (pkt[3] << 5) | (pkt[4] >> 2); 613 dev->touch = (pkt[0] & 0x40) ? 1 : 0; 614 return 1; 615 616 case 0x98: 617 /* touch data in MT emulation mode */ 618 dev->x = (pkt[2] << 5) | (pkt[1] >> 2); 619 dev->y = (pkt[4] << 5) | (pkt[3] >> 2); 620 dev->touch = (pkt[0] & 0x40) ? 1 : 0; 621 return 1; 622 623 default: 624 return 0; 625 } 626} 627#endif 628 629/***************************************************************************** 630 * General Touch Part 631 */ 632#ifdef CONFIG_TOUCHSCREEN_USB_GENERAL_TOUCH 633static int general_touch_read_data(struct usbtouch_usb *dev, unsigned char *pkt) 634{ 635 dev->x = (pkt[2] << 8) | pkt[1]; 636 dev->y = (pkt[4] << 8) | pkt[3]; 637 dev->press = pkt[5] & 0xff; 638 dev->touch = pkt[0] & 0x01; 639 640 return 1; 641} 642#endif 643 644/***************************************************************************** 645 * GoTop Part 646 */ 647#ifdef CONFIG_TOUCHSCREEN_USB_GOTOP 648static int gotop_read_data(struct usbtouch_usb *dev, unsigned char *pkt) 649{ 650 dev->x = ((pkt[1] & 0x38) << 4) | pkt[2]; 651 dev->y = ((pkt[1] & 0x07) << 7) | pkt[3]; 652 dev->touch = pkt[0] & 0x01; 653 654 return 1; 655} 656#endif 657 658/***************************************************************************** 659 * JASTEC Part 660 */ 661#ifdef CONFIG_TOUCHSCREEN_USB_JASTEC 662static int jastec_read_data(struct usbtouch_usb *dev, unsigned char *pkt) 663{ 664 dev->x = ((pkt[0] & 0x3f) << 6) | (pkt[2] & 0x3f); 665 dev->y = ((pkt[1] & 0x3f) << 6) | (pkt[3] & 0x3f); 666 dev->touch = (pkt[0] & 0x40) >> 6; 667 668 return 1; 669} 670#endif 671 672/***************************************************************************** 673 * Zytronic Part 674 */ 675#ifdef CONFIG_TOUCHSCREEN_USB_ZYTRONIC 676static int zytronic_read_data(struct usbtouch_usb *dev, unsigned char *pkt) 677{ 678 switch (pkt[0]) { 679 case 0x3A: /* command response */ 680 dbg("%s: Command response %d", __func__, pkt[1]); 681 break; 682 683 case 0xC0: /* down */ 684 dev->x = (pkt[1] & 0x7f) | ((pkt[2] & 0x07) << 7); 685 dev->y = (pkt[3] & 0x7f) | ((pkt[4] & 0x07) << 7); 686 dev->touch = 1; 687 dbg("%s: down %d,%d", __func__, dev->x, dev->y); 688 return 1; 689 690 case 0x80: /* up */ 691 dev->x = (pkt[1] & 0x7f) | ((pkt[2] & 0x07) << 7); 692 dev->y = (pkt[3] & 0x7f) | ((pkt[4] & 0x07) << 7); 693 dev->touch = 0; 694 dbg("%s: up %d,%d", __func__, dev->x, dev->y); 695 return 1; 696 697 default: 698 dbg("%s: Unknown return %d", __func__, pkt[0]); 699 break; 700 } 701 702 return 0; 703} 704#endif 705 706/***************************************************************************** 707 * NEXIO Part 708 */ 709#ifdef CONFIG_TOUCHSCREEN_USB_NEXIO 710 711#define NEXIO_TIMEOUT 5000 712#define NEXIO_BUFSIZE 1024 713#define NEXIO_THRESHOLD 50 714 715struct nexio_priv { 716 struct urb *ack; 717 unsigned char *ack_buf; 718}; 719 720struct nexio_touch_packet { 721 u8 flags; /* 0xe1 = touch, 0xe1 = release */ 722 __be16 data_len; /* total bytes of touch data */ 723 __be16 x_len; /* bytes for X axis */ 724 __be16 y_len; /* bytes for Y axis */ 725 u8 data[]; 726} __attribute__ ((packed)); 727 728static unsigned char nexio_ack_pkt[2] = { 0xaa, 0x02 }; 729static unsigned char nexio_init_pkt[4] = { 0x82, 0x04, 0x0a, 0x0f }; 730 731static void nexio_ack_complete(struct urb *urb) 732{ 733} 734 735static int nexio_init(struct usbtouch_usb *usbtouch) 736{ 737 struct usb_device *dev = interface_to_usbdev(usbtouch->interface); 738 struct usb_host_interface *interface = usbtouch->interface->cur_altsetting; 739 struct nexio_priv *priv; 740 int ret = -ENOMEM; 741 int actual_len, i; 742 unsigned char *buf; 743 char *firmware_ver = NULL, *device_name = NULL; 744 int input_ep = 0, output_ep = 0; 745 746 /* find first input and output endpoint */ 747 for (i = 0; i < interface->desc.bNumEndpoints; i++) { 748 if (!input_ep && 749 usb_endpoint_dir_in(&interface->endpoint[i].desc)) 750 input_ep = interface->endpoint[i].desc.bEndpointAddress; 751 if (!output_ep && 752 usb_endpoint_dir_out(&interface->endpoint[i].desc)) 753 output_ep = interface->endpoint[i].desc.bEndpointAddress; 754 } 755 if (!input_ep || !output_ep) 756 return -ENXIO; 757 758 buf = kmalloc(NEXIO_BUFSIZE, GFP_KERNEL); 759 if (!buf) 760 goto out_buf; 761 762 /* two empty reads */ 763 for (i = 0; i < 2; i++) { 764 ret = usb_bulk_msg(dev, usb_rcvbulkpipe(dev, input_ep), 765 buf, NEXIO_BUFSIZE, &actual_len, 766 NEXIO_TIMEOUT); 767 if (ret < 0) 768 goto out_buf; 769 } 770 771 /* send init command */ 772 memcpy(buf, nexio_init_pkt, sizeof(nexio_init_pkt)); 773 ret = usb_bulk_msg(dev, usb_sndbulkpipe(dev, output_ep), 774 buf, sizeof(nexio_init_pkt), &actual_len, 775 NEXIO_TIMEOUT); 776 if (ret < 0) 777 goto out_buf; 778 779 /* read replies */ 780 for (i = 0; i < 3; i++) { 781 memset(buf, 0, NEXIO_BUFSIZE); 782 ret = usb_bulk_msg(dev, usb_rcvbulkpipe(dev, input_ep), 783 buf, NEXIO_BUFSIZE, &actual_len, 784 NEXIO_TIMEOUT); 785 if (ret < 0 || actual_len < 1 || buf[1] != actual_len) 786 continue; 787 switch (buf[0]) { 788 case 0x83: /* firmware version */ 789 if (!firmware_ver) 790 firmware_ver = kstrdup(&buf[2], GFP_KERNEL); 791 break; 792 case 0x84: /* device name */ 793 if (!device_name) 794 device_name = kstrdup(&buf[2], GFP_KERNEL); 795 break; 796 } 797 } 798 799 printk(KERN_INFO "Nexio device: %s, firmware version: %s\n", 800 device_name, firmware_ver); 801 802 kfree(firmware_ver); 803 kfree(device_name); 804 805 /* prepare ACK URB */ 806 ret = -ENOMEM; 807 808 usbtouch->priv = kmalloc(sizeof(struct nexio_priv), GFP_KERNEL); 809 if (!usbtouch->priv) 810 goto out_buf; 811 812 priv = usbtouch->priv; 813 814 priv->ack_buf = kmemdup(nexio_ack_pkt, sizeof(nexio_ack_pkt), 815 GFP_KERNEL); 816 if (!priv->ack_buf) 817 goto err_priv; 818 819 priv->ack = usb_alloc_urb(0, GFP_KERNEL); 820 if (!priv->ack) { 821 dbg("%s - usb_alloc_urb failed: usbtouch->ack", __func__); 822 goto err_ack_buf; 823 } 824 825 usb_fill_bulk_urb(priv->ack, dev, usb_sndbulkpipe(dev, output_ep), 826 priv->ack_buf, sizeof(nexio_ack_pkt), 827 nexio_ack_complete, usbtouch); 828 ret = 0; 829 goto out_buf; 830 831err_ack_buf: 832 kfree(priv->ack_buf); 833err_priv: 834 kfree(priv); 835out_buf: 836 kfree(buf); 837 return ret; 838} 839 840static void nexio_exit(struct usbtouch_usb *usbtouch) 841{ 842 struct nexio_priv *priv = usbtouch->priv; 843 844 usb_kill_urb(priv->ack); 845 usb_free_urb(priv->ack); 846 kfree(priv->ack_buf); 847 kfree(priv); 848} 849 850static int nexio_read_data(struct usbtouch_usb *usbtouch, unsigned char *pkt) 851{ 852 struct nexio_touch_packet *packet = (void *) pkt; 853 struct nexio_priv *priv = usbtouch->priv; 854 unsigned int data_len = be16_to_cpu(packet->data_len); 855 unsigned int x_len = be16_to_cpu(packet->x_len); 856 unsigned int y_len = be16_to_cpu(packet->y_len); 857 int x, y, begin_x, begin_y, end_x, end_y, w, h, ret; 858 859 /* got touch data? */ 860 if ((pkt[0] & 0xe0) != 0xe0) 861 return 0; 862 863 if (data_len > 0xff) 864 data_len -= 0x100; 865 if (x_len > 0xff) 866 x_len -= 0x80; 867 868 /* send ACK */ 869 ret = usb_submit_urb(priv->ack, GFP_ATOMIC); 870 871 if (!usbtouch->type->max_xc) { 872 usbtouch->type->max_xc = 2 * x_len; 873 input_set_abs_params(usbtouch->input, ABS_X, 874 0, usbtouch->type->max_xc, 0, 0); 875 usbtouch->type->max_yc = 2 * y_len; 876 input_set_abs_params(usbtouch->input, ABS_Y, 877 0, usbtouch->type->max_yc, 0, 0); 878 } 879 /* 880 * The device reports state of IR sensors on X and Y axes. 881 * Each byte represents "darkness" percentage (0-100) of one element. 882 * 17" touchscreen reports only 64 x 52 bytes so the resolution is low. 883 * This also means that there's a limited multi-touch capability but 884 * it's disabled (and untested) here as there's no X driver for that. 885 */ 886 begin_x = end_x = begin_y = end_y = -1; 887 for (x = 0; x < x_len; x++) { 888 if (begin_x == -1 && packet->data[x] > NEXIO_THRESHOLD) { 889 begin_x = x; 890 continue; 891 } 892 if (end_x == -1 && begin_x != -1 && packet->data[x] < NEXIO_THRESHOLD) { 893 end_x = x - 1; 894 for (y = x_len; y < data_len; y++) { 895 if (begin_y == -1 && packet->data[y] > NEXIO_THRESHOLD) { 896 begin_y = y - x_len; 897 continue; 898 } 899 if (end_y == -1 && 900 begin_y != -1 && packet->data[y] < NEXIO_THRESHOLD) { 901 end_y = y - 1 - x_len; 902 w = end_x - begin_x; 903 h = end_y - begin_y; 904#if 0 905 /* multi-touch */ 906 input_report_abs(usbtouch->input, 907 ABS_MT_TOUCH_MAJOR, max(w,h)); 908 input_report_abs(usbtouch->input, 909 ABS_MT_TOUCH_MINOR, min(x,h)); 910 input_report_abs(usbtouch->input, 911 ABS_MT_POSITION_X, 2*begin_x+w); 912 input_report_abs(usbtouch->input, 913 ABS_MT_POSITION_Y, 2*begin_y+h); 914 input_report_abs(usbtouch->input, 915 ABS_MT_ORIENTATION, w > h); 916 input_mt_sync(usbtouch->input); 917#endif 918 /* single touch */ 919 usbtouch->x = 2 * begin_x + w; 920 usbtouch->y = 2 * begin_y + h; 921 usbtouch->touch = packet->flags & 0x01; 922 begin_y = end_y = -1; 923 return 1; 924 } 925 } 926 begin_x = end_x = -1; 927 } 928 929 } 930 return 0; 931} 932#endif 933 934 935/***************************************************************************** 936 * the different device descriptors 937 */ 938#ifdef MULTI_PACKET 939static void usbtouch_process_multi(struct usbtouch_usb *usbtouch, 940 unsigned char *pkt, int len); 941#endif 942 943static struct usbtouch_device_info usbtouch_dev_info[] = { 944#ifdef CONFIG_TOUCHSCREEN_USB_EGALAX 945 [DEVTYPE_EGALAX] = { 946 .min_xc = 0x0, 947 .max_xc = 0x07ff, 948 .min_yc = 0x0, 949 .max_yc = 0x07ff, 950 .rept_size = 16, 951 .process_pkt = usbtouch_process_multi, 952 .get_pkt_len = egalax_get_pkt_len, 953 .read_data = egalax_read_data, 954 }, 955#endif 956 957#ifdef CONFIG_TOUCHSCREEN_USB_PANJIT 958 [DEVTYPE_PANJIT] = { 959 .min_xc = 0x0, 960 .max_xc = 0x0fff, 961 .min_yc = 0x0, 962 .max_yc = 0x0fff, 963 .rept_size = 8, 964 .read_data = panjit_read_data, 965 }, 966#endif 967 968#ifdef CONFIG_TOUCHSCREEN_USB_3M 969 [DEVTYPE_3M] = { 970 .min_xc = 0x0, 971 .max_xc = 0x4000, 972 .min_yc = 0x0, 973 .max_yc = 0x4000, 974 .rept_size = 11, 975 .read_data = mtouch_read_data, 976 .init = mtouch_init, 977 }, 978#endif 979 980#ifdef CONFIG_TOUCHSCREEN_USB_ITM 981 [DEVTYPE_ITM] = { 982 .min_xc = 0x0, 983 .max_xc = 0x0fff, 984 .min_yc = 0x0, 985 .max_yc = 0x0fff, 986 .max_press = 0xff, 987 .rept_size = 8, 988 .read_data = itm_read_data, 989 }, 990#endif 991 992#ifdef CONFIG_TOUCHSCREEN_USB_ETURBO 993 [DEVTYPE_ETURBO] = { 994 .min_xc = 0x0, 995 .max_xc = 0x07ff, 996 .min_yc = 0x0, 997 .max_yc = 0x07ff, 998 .rept_size = 8, 999 .process_pkt = usbtouch_process_multi, 1000 .get_pkt_len = eturbo_get_pkt_len, 1001 .read_data = eturbo_read_data, 1002 }, 1003#endif 1004 1005#ifdef CONFIG_TOUCHSCREEN_USB_GUNZE 1006 [DEVTYPE_GUNZE] = { 1007 .min_xc = 0x0, 1008 .max_xc = 0x0fff, 1009 .min_yc = 0x0, 1010 .max_yc = 0x0fff, 1011 .rept_size = 4, 1012 .read_data = gunze_read_data, 1013 }, 1014#endif 1015 1016#ifdef CONFIG_TOUCHSCREEN_USB_DMC_TSC10 1017 [DEVTYPE_DMC_TSC10] = { 1018 .min_xc = 0x0, 1019 .max_xc = 0x03ff, 1020 .min_yc = 0x0, 1021 .max_yc = 0x03ff, 1022 .rept_size = 5, 1023 .init = dmc_tsc10_init, 1024 .read_data = dmc_tsc10_read_data, 1025 }, 1026#endif 1027 1028#ifdef CONFIG_TOUCHSCREEN_USB_IRTOUCH 1029 [DEVTYPE_IRTOUCH] = { 1030 .min_xc = 0x0, 1031 .max_xc = 0x0fff, 1032 .min_yc = 0x0, 1033 .max_yc = 0x0fff, 1034 .rept_size = 8, 1035 .read_data = irtouch_read_data, 1036 }, 1037#endif 1038 1039#ifdef CONFIG_TOUCHSCREEN_USB_IDEALTEK 1040 [DEVTYPE_IDEALTEK] = { 1041 .min_xc = 0x0, 1042 .max_xc = 0x0fff, 1043 .min_yc = 0x0, 1044 .max_yc = 0x0fff, 1045 .rept_size = 8, 1046 .process_pkt = usbtouch_process_multi, 1047 .get_pkt_len = idealtek_get_pkt_len, 1048 .read_data = idealtek_read_data, 1049 }, 1050#endif 1051 1052#ifdef CONFIG_TOUCHSCREEN_USB_GENERAL_TOUCH 1053 [DEVTYPE_GENERAL_TOUCH] = { 1054 .min_xc = 0x0, 1055 .max_xc = 0x7fff, 1056 .min_yc = 0x0, 1057 .max_yc = 0x7fff, 1058 .rept_size = 7, 1059 .read_data = general_touch_read_data, 1060 }, 1061#endif 1062 1063#ifdef CONFIG_TOUCHSCREEN_USB_GOTOP 1064 [DEVTYPE_GOTOP] = { 1065 .min_xc = 0x0, 1066 .max_xc = 0x03ff, 1067 .min_yc = 0x0, 1068 .max_yc = 0x03ff, 1069 .rept_size = 4, 1070 .read_data = gotop_read_data, 1071 }, 1072#endif 1073 1074#ifdef CONFIG_TOUCHSCREEN_USB_JASTEC 1075 [DEVTYPE_JASTEC] = { 1076 .min_xc = 0x0, 1077 .max_xc = 0x0fff, 1078 .min_yc = 0x0, 1079 .max_yc = 0x0fff, 1080 .rept_size = 4, 1081 .read_data = jastec_read_data, 1082 }, 1083#endif 1084 1085#ifdef CONFIG_TOUCHSCREEN_USB_E2I 1086 [DEVTYPE_E2I] = { 1087 .min_xc = 0x0, 1088 .max_xc = 0x7fff, 1089 .min_yc = 0x0, 1090 .max_yc = 0x7fff, 1091 .rept_size = 6, 1092 .init = e2i_init, 1093 .read_data = e2i_read_data, 1094 }, 1095#endif 1096 1097#ifdef CONFIG_TOUCHSCREEN_USB_ZYTRONIC 1098 [DEVTYPE_ZYTRONIC] = { 1099 .min_xc = 0x0, 1100 .max_xc = 0x03ff, 1101 .min_yc = 0x0, 1102 .max_yc = 0x03ff, 1103 .rept_size = 5, 1104 .read_data = zytronic_read_data, 1105 .irq_always = true, 1106 }, 1107#endif 1108 1109#ifdef CONFIG_TOUCHSCREEN_USB_ETT_TC5UH 1110 [DEVTYPE_TC5UH] = { 1111 .min_xc = 0x0, 1112 .max_xc = 0x0fff, 1113 .min_yc = 0x0, 1114 .max_yc = 0x0fff, 1115 .rept_size = 5, 1116 .read_data = tc5uh_read_data, 1117 }, 1118#endif 1119 1120#ifdef CONFIG_TOUCHSCREEN_USB_NEXIO 1121 [DEVTYPE_NEXIO] = { 1122 .rept_size = 1024, 1123 .irq_always = true, 1124 .read_data = nexio_read_data, 1125 .init = nexio_init, 1126 .exit = nexio_exit, 1127 }, 1128#endif 1129}; 1130 1131 1132/***************************************************************************** 1133 * Generic Part 1134 */ 1135static void usbtouch_process_pkt(struct usbtouch_usb *usbtouch, 1136 unsigned char *pkt, int len) 1137{ 1138 struct usbtouch_device_info *type = usbtouch->type; 1139 1140 if (!type->read_data(usbtouch, pkt)) 1141 return; 1142 1143 input_report_key(usbtouch->input, BTN_TOUCH, usbtouch->touch); 1144 1145 if (swap_xy) { 1146 input_report_abs(usbtouch->input, ABS_X, usbtouch->y); 1147 input_report_abs(usbtouch->input, ABS_Y, usbtouch->x); 1148 } else { 1149 input_report_abs(usbtouch->input, ABS_X, usbtouch->x); 1150 input_report_abs(usbtouch->input, ABS_Y, usbtouch->y); 1151 } 1152 if (type->max_press) 1153 input_report_abs(usbtouch->input, ABS_PRESSURE, usbtouch->press); 1154 input_sync(usbtouch->input); 1155} 1156 1157 1158#ifdef MULTI_PACKET 1159static void usbtouch_process_multi(struct usbtouch_usb *usbtouch, 1160 unsigned char *pkt, int len) 1161{ 1162 unsigned char *buffer; 1163 int pkt_len, pos, buf_len, tmp; 1164 1165 /* process buffer */ 1166 if (unlikely(usbtouch->buf_len)) { 1167 /* try to get size */ 1168 pkt_len = usbtouch->type->get_pkt_len( 1169 usbtouch->buffer, usbtouch->buf_len); 1170 1171 /* drop? */ 1172 if (unlikely(!pkt_len)) 1173 goto out_flush_buf; 1174 1175 /* need to append -pkt_len bytes before able to get size */ 1176 if (unlikely(pkt_len < 0)) { 1177 int append = -pkt_len; 1178 if (unlikely(append > len)) 1179 append = len; 1180 if (usbtouch->buf_len + append >= usbtouch->type->rept_size) 1181 goto out_flush_buf; 1182 memcpy(usbtouch->buffer + usbtouch->buf_len, pkt, append); 1183 usbtouch->buf_len += append; 1184 1185 pkt_len = usbtouch->type->get_pkt_len( 1186 usbtouch->buffer, usbtouch->buf_len); 1187 if (pkt_len < 0) 1188 return; 1189 } 1190 1191 /* append */ 1192 tmp = pkt_len - usbtouch->buf_len; 1193 if (usbtouch->buf_len + tmp >= usbtouch->type->rept_size) 1194 goto out_flush_buf; 1195 memcpy(usbtouch->buffer + usbtouch->buf_len, pkt, tmp); 1196 usbtouch_process_pkt(usbtouch, usbtouch->buffer, pkt_len); 1197 1198 buffer = pkt + tmp; 1199 buf_len = len - tmp; 1200 } else { 1201 buffer = pkt; 1202 buf_len = len; 1203 } 1204 1205 /* loop over the received packet, process */ 1206 pos = 0; 1207 while (pos < buf_len) { 1208 /* get packet len */ 1209 pkt_len = usbtouch->type->get_pkt_len(buffer + pos, 1210 buf_len - pos); 1211 1212 /* unknown packet: skip one byte */ 1213 if (unlikely(!pkt_len)) { 1214 pos++; 1215 continue; 1216 } 1217 1218 /* full packet: process */ 1219 if (likely((pkt_len > 0) && (pkt_len <= buf_len - pos))) { 1220 usbtouch_process_pkt(usbtouch, buffer + pos, pkt_len); 1221 } else { 1222 /* incomplete packet: save in buffer */ 1223 memcpy(usbtouch->buffer, buffer + pos, buf_len - pos); 1224 usbtouch->buf_len = buf_len - pos; 1225 return; 1226 } 1227 pos += pkt_len; 1228 } 1229 1230out_flush_buf: 1231 usbtouch->buf_len = 0; 1232 return; 1233} 1234#endif 1235 1236 1237static void usbtouch_irq(struct urb *urb) 1238{ 1239 struct usbtouch_usb *usbtouch = urb->context; 1240 int retval; 1241 1242 switch (urb->status) { 1243 case 0: 1244 /* success */ 1245 break; 1246 case -ETIME: 1247 /* this urb is timing out */ 1248 dbg("%s - urb timed out - was the device unplugged?", 1249 __func__); 1250 return; 1251 case -ECONNRESET: 1252 case -ENOENT: 1253 case -ESHUTDOWN: 1254 case -EPIPE: 1255 /* this urb is terminated, clean up */ 1256 dbg("%s - urb shutting down with status: %d", 1257 __func__, urb->status); 1258 return; 1259 default: 1260 dbg("%s - nonzero urb status received: %d", 1261 __func__, urb->status); 1262 goto exit; 1263 } 1264 1265 usbtouch->type->process_pkt(usbtouch, usbtouch->data, urb->actual_length); 1266 1267exit: 1268 retval = usb_submit_urb(urb, GFP_ATOMIC); 1269 if (retval) 1270 err("%s - usb_submit_urb failed with result: %d", 1271 __func__, retval); 1272} 1273 1274static int usbtouch_open(struct input_dev *input) 1275{ 1276 struct usbtouch_usb *usbtouch = input_get_drvdata(input); 1277 1278 usbtouch->irq->dev = interface_to_usbdev(usbtouch->interface); 1279 1280 if (!usbtouch->type->irq_always) { 1281 if (usb_submit_urb(usbtouch->irq, GFP_KERNEL)) 1282 return -EIO; 1283 } 1284 1285 return 0; 1286} 1287 1288static void usbtouch_close(struct input_dev *input) 1289{ 1290 struct usbtouch_usb *usbtouch = input_get_drvdata(input); 1291 1292 if (!usbtouch->type->irq_always) 1293 usb_kill_urb(usbtouch->irq); 1294} 1295 1296 1297static void usbtouch_free_buffers(struct usb_device *udev, 1298 struct usbtouch_usb *usbtouch) 1299{ 1300 usb_free_coherent(udev, usbtouch->type->rept_size, 1301 usbtouch->data, usbtouch->data_dma); 1302 kfree(usbtouch->buffer); 1303} 1304 1305static struct usb_endpoint_descriptor * 1306usbtouch_get_input_endpoint(struct usb_host_interface *interface) 1307{ 1308 int i; 1309 1310 for (i = 0; i < interface->desc.bNumEndpoints; i++) 1311 if (usb_endpoint_dir_in(&interface->endpoint[i].desc)) 1312 return &interface->endpoint[i].desc; 1313 1314 return NULL; 1315} 1316 1317static int usbtouch_probe(struct usb_interface *intf, 1318 const struct usb_device_id *id) 1319{ 1320 struct usbtouch_usb *usbtouch; 1321 struct input_dev *input_dev; 1322 struct usb_endpoint_descriptor *endpoint; 1323 struct usb_device *udev = interface_to_usbdev(intf); 1324 struct usbtouch_device_info *type; 1325 int err = -ENOMEM; 1326 1327 /* some devices are ignored */ 1328 if (id->driver_info == DEVTYPE_IGNORE) 1329 return -ENODEV; 1330 1331 endpoint = usbtouch_get_input_endpoint(intf->cur_altsetting); 1332 if (!endpoint) 1333 return -ENXIO; 1334 1335 usbtouch = kzalloc(sizeof(struct usbtouch_usb), GFP_KERNEL); 1336 input_dev = input_allocate_device(); 1337 if (!usbtouch || !input_dev) 1338 goto out_free; 1339 1340 type = &usbtouch_dev_info[id->driver_info]; 1341 usbtouch->type = type; 1342 if (!type->process_pkt) 1343 type->process_pkt = usbtouch_process_pkt; 1344 1345 usbtouch->data = usb_alloc_coherent(udev, type->rept_size, 1346 GFP_KERNEL, &usbtouch->data_dma); 1347 if (!usbtouch->data) 1348 goto out_free; 1349 1350 if (type->get_pkt_len) { 1351 usbtouch->buffer = kmalloc(type->rept_size, GFP_KERNEL); 1352 if (!usbtouch->buffer) 1353 goto out_free_buffers; 1354 } 1355 1356 usbtouch->irq = usb_alloc_urb(0, GFP_KERNEL); 1357 if (!usbtouch->irq) { 1358 dbg("%s - usb_alloc_urb failed: usbtouch->irq", __func__); 1359 goto out_free_buffers; 1360 } 1361 1362 usbtouch->interface = intf; 1363 usbtouch->input = input_dev; 1364 1365 if (udev->manufacturer) 1366 strlcpy(usbtouch->name, udev->manufacturer, sizeof(usbtouch->name)); 1367 1368 if (udev->product) { 1369 if (udev->manufacturer) 1370 strlcat(usbtouch->name, " ", sizeof(usbtouch->name)); 1371 strlcat(usbtouch->name, udev->product, sizeof(usbtouch->name)); 1372 } 1373 1374 if (!strlen(usbtouch->name)) 1375 snprintf(usbtouch->name, sizeof(usbtouch->name), 1376 "USB Touchscreen %04x:%04x", 1377 le16_to_cpu(udev->descriptor.idVendor), 1378 le16_to_cpu(udev->descriptor.idProduct)); 1379 1380 usb_make_path(udev, usbtouch->phys, sizeof(usbtouch->phys)); 1381 strlcat(usbtouch->phys, "/input0", sizeof(usbtouch->phys)); 1382 1383 input_dev->name = usbtouch->name; 1384 input_dev->phys = usbtouch->phys; 1385 usb_to_input_id(udev, &input_dev->id); 1386 input_dev->dev.parent = &intf->dev; 1387 1388 input_set_drvdata(input_dev, usbtouch); 1389 1390 input_dev->open = usbtouch_open; 1391 input_dev->close = usbtouch_close; 1392 1393 input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS); 1394 input_dev->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH); 1395 input_set_abs_params(input_dev, ABS_X, type->min_xc, type->max_xc, 0, 0); 1396 input_set_abs_params(input_dev, ABS_Y, type->min_yc, type->max_yc, 0, 0); 1397 if (type->max_press) 1398 input_set_abs_params(input_dev, ABS_PRESSURE, type->min_press, 1399 type->max_press, 0, 0); 1400 1401 if (usb_endpoint_type(endpoint) == USB_ENDPOINT_XFER_INT) 1402 usb_fill_int_urb(usbtouch->irq, udev, 1403 usb_rcvintpipe(udev, endpoint->bEndpointAddress), 1404 usbtouch->data, type->rept_size, 1405 usbtouch_irq, usbtouch, endpoint->bInterval); 1406 else 1407 usb_fill_bulk_urb(usbtouch->irq, udev, 1408 usb_rcvbulkpipe(udev, endpoint->bEndpointAddress), 1409 usbtouch->data, type->rept_size, 1410 usbtouch_irq, usbtouch); 1411 1412 usbtouch->irq->dev = udev; 1413 usbtouch->irq->transfer_dma = usbtouch->data_dma; 1414 usbtouch->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; 1415 1416 /* device specific init */ 1417 if (type->init) { 1418 err = type->init(usbtouch); 1419 if (err) { 1420 dbg("%s - type->init() failed, err: %d", __func__, err); 1421 goto out_free_urb; 1422 } 1423 } 1424 1425 err = input_register_device(usbtouch->input); 1426 if (err) { 1427 dbg("%s - input_register_device failed, err: %d", __func__, err); 1428 goto out_do_exit; 1429 } 1430 1431 usb_set_intfdata(intf, usbtouch); 1432 1433 if (usbtouch->type->irq_always) { 1434 err = usb_submit_urb(usbtouch->irq, GFP_KERNEL); 1435 if (err) { 1436 err("%s - usb_submit_urb failed with result: %d", 1437 __func__, err); 1438 goto out_unregister_input; 1439 } 1440 } 1441 1442 return 0; 1443 1444out_unregister_input: 1445 input_unregister_device(input_dev); 1446 input_dev = NULL; 1447out_do_exit: 1448 if (type->exit) 1449 type->exit(usbtouch); 1450out_free_urb: 1451 usb_free_urb(usbtouch->irq); 1452out_free_buffers: 1453 usbtouch_free_buffers(udev, usbtouch); 1454out_free: 1455 input_free_device(input_dev); 1456 kfree(usbtouch); 1457 return err; 1458} 1459 1460static void usbtouch_disconnect(struct usb_interface *intf) 1461{ 1462 struct usbtouch_usb *usbtouch = usb_get_intfdata(intf); 1463 1464 dbg("%s - called", __func__); 1465 1466 if (!usbtouch) 1467 return; 1468 1469 dbg("%s - usbtouch is initialized, cleaning up", __func__); 1470 usb_set_intfdata(intf, NULL); 1471 /* this will stop IO via close */ 1472 input_unregister_device(usbtouch->input); 1473 usb_free_urb(usbtouch->irq); 1474 if (usbtouch->type->exit) 1475 usbtouch->type->exit(usbtouch); 1476 usbtouch_free_buffers(interface_to_usbdev(intf), usbtouch); 1477 kfree(usbtouch); 1478} 1479 1480MODULE_DEVICE_TABLE(usb, usbtouch_devices); 1481 1482static struct usb_driver usbtouch_driver = { 1483 .name = "usbtouchscreen", 1484 .probe = usbtouch_probe, 1485 .disconnect = usbtouch_disconnect, 1486 .id_table = usbtouch_devices, 1487}; 1488 1489static int __init usbtouch_init(void) 1490{ 1491 return usb_register(&usbtouch_driver); 1492} 1493 1494static void __exit usbtouch_cleanup(void) 1495{ 1496 usb_deregister(&usbtouch_driver); 1497} 1498 1499module_init(usbtouch_init); 1500module_exit(usbtouch_cleanup); 1501 1502MODULE_AUTHOR(DRIVER_AUTHOR); 1503MODULE_DESCRIPTION(DRIVER_DESC); 1504MODULE_LICENSE("GPL"); 1505 1506MODULE_ALIAS("touchkitusb"); 1507MODULE_ALIAS("itmtouch"); 1508MODULE_ALIAS("mtouchusb"); 1509