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 * - Elo TouchSystems 2700 IntelliTouch 20 * - EasyTouch USB Dual/Multi touch controller from Data Modul 21 * 22 * Copyright (C) 2004-2007 by Daniel Ritz <daniel.ritz@gmx.ch> 23 * Copyright (C) by Todd E. Johnson (mtouchusb.c) 24 * 25 * This program is free software; you can redistribute it and/or 26 * modify it under the terms of the GNU General Public License as 27 * published by the Free Software Foundation; either version 2 of the 28 * License, or (at your option) any later version. 29 * 30 * This program is distributed in the hope that it will be useful, but 31 * WITHOUT ANY WARRANTY; without even the implied warranty of 32 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 33 * General Public License for more details. 34 * 35 * You should have received a copy of the GNU General Public License 36 * along with this program; if not, write to the Free Software 37 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 38 * 39 * Driver is based on touchkitusb.c 40 * - ITM parts are from itmtouch.c 41 * - 3M parts are from mtouchusb.c 42 * - PanJit parts are from an unmerged driver by Lanslott Gish 43 * - DMC TSC 10/25 are from Holger Schurig, with ideas from an unmerged 44 * driver from Marius Vollmer 45 * 46 *****************************************************************************/ 47 48 //#define DEBUG 49 50 #include <linux/kernel.h> 51 #include <linux/slab.h> 52 #include <linux/input.h> 53 #include <linux/module.h> 54 #include <linux/usb.h> 55 #include <linux/usb/input.h> 56 #include <linux/hid.h> 57 58 static bool swap_xy; 59 module_param(swap_xy, bool, 0644); 60 MODULE_PARM_DESC(swap_xy, "If set X and Y axes are swapped."); 61 62 static bool hwcalib_xy; 63 module_param(hwcalib_xy, bool, 0644); 64 MODULE_PARM_DESC(hwcalib_xy, "If set hw-calibrated X/Y are used if available"); 65 66 /* device specifc data/functions */ 67 struct usbtouch_usb; 68 struct usbtouch_device_info { 69 int min_xc, max_xc; 70 int min_yc, max_yc; 71 int min_press, max_press; 72 int rept_size; 73 74 /* 75 * Always service the USB devices irq not just when the input device is 76 * open. This is useful when devices have a watchdog which prevents us 77 * from periodically polling the device. Leave this unset unless your 78 * touchscreen device requires it, as it does consume more of the USB 79 * bandwidth. 80 */ 81 bool irq_always; 82 83 void (*process_pkt) (struct usbtouch_usb *usbtouch, unsigned char *pkt, int len); 84 85 /* 86 * used to get the packet len. possible return values: 87 * > 0: packet len 88 * = 0: skip one byte 89 * < 0: -return value more bytes needed 90 */ 91 int (*get_pkt_len) (unsigned char *pkt, int len); 92 93 int (*read_data) (struct usbtouch_usb *usbtouch, unsigned char *pkt); 94 int (*alloc) (struct usbtouch_usb *usbtouch); 95 int (*init) (struct usbtouch_usb *usbtouch); 96 void (*exit) (struct usbtouch_usb *usbtouch); 97 }; 98 99 /* a usbtouch device */ 100 struct usbtouch_usb { 101 unsigned char *data; 102 dma_addr_t data_dma; 103 int data_size; 104 unsigned char *buffer; 105 int buf_len; 106 struct urb *irq; 107 struct usb_interface *interface; 108 struct input_dev *input; 109 struct usbtouch_device_info *type; 110 char name[128]; 111 char phys[64]; 112 void *priv; 113 114 int x, y; 115 int touch, press; 116 }; 117 118 119 /* device types */ 120 enum { 121 DEVTYPE_IGNORE = -1, 122 DEVTYPE_EGALAX, 123 DEVTYPE_PANJIT, 124 DEVTYPE_3M, 125 DEVTYPE_ITM, 126 DEVTYPE_ETURBO, 127 DEVTYPE_GUNZE, 128 DEVTYPE_DMC_TSC10, 129 DEVTYPE_IRTOUCH, 130 DEVTYPE_IRTOUCH_HIRES, 131 DEVTYPE_IDEALTEK, 132 DEVTYPE_GENERAL_TOUCH, 133 DEVTYPE_GOTOP, 134 DEVTYPE_JASTEC, 135 DEVTYPE_E2I, 136 DEVTYPE_ZYTRONIC, 137 DEVTYPE_TC45USB, 138 DEVTYPE_NEXIO, 139 DEVTYPE_ELO, 140 DEVTYPE_ETOUCH, 141 }; 142 143 #define USB_DEVICE_HID_CLASS(vend, prod) \ 144 .match_flags = USB_DEVICE_ID_MATCH_INT_CLASS \ 145 | USB_DEVICE_ID_MATCH_DEVICE, \ 146 .idVendor = (vend), \ 147 .idProduct = (prod), \ 148 .bInterfaceClass = USB_INTERFACE_CLASS_HID 149 150 static const struct usb_device_id usbtouch_devices[] = { 151 #ifdef CONFIG_TOUCHSCREEN_USB_EGALAX 152 /* ignore the HID capable devices, handled by usbhid */ 153 {USB_DEVICE_HID_CLASS(0x0eef, 0x0001), .driver_info = DEVTYPE_IGNORE}, 154 {USB_DEVICE_HID_CLASS(0x0eef, 0x0002), .driver_info = DEVTYPE_IGNORE}, 155 156 /* normal device IDs */ 157 {USB_DEVICE(0x3823, 0x0001), .driver_info = DEVTYPE_EGALAX}, 158 {USB_DEVICE(0x3823, 0x0002), .driver_info = DEVTYPE_EGALAX}, 159 {USB_DEVICE(0x0123, 0x0001), .driver_info = DEVTYPE_EGALAX}, 160 {USB_DEVICE(0x0eef, 0x0001), .driver_info = DEVTYPE_EGALAX}, 161 {USB_DEVICE(0x0eef, 0x0002), .driver_info = DEVTYPE_EGALAX}, 162 {USB_DEVICE(0x1234, 0x0001), .driver_info = DEVTYPE_EGALAX}, 163 {USB_DEVICE(0x1234, 0x0002), .driver_info = DEVTYPE_EGALAX}, 164 #endif 165 166 #ifdef CONFIG_TOUCHSCREEN_USB_PANJIT 167 {USB_DEVICE(0x134c, 0x0001), .driver_info = DEVTYPE_PANJIT}, 168 {USB_DEVICE(0x134c, 0x0002), .driver_info = DEVTYPE_PANJIT}, 169 {USB_DEVICE(0x134c, 0x0003), .driver_info = DEVTYPE_PANJIT}, 170 {USB_DEVICE(0x134c, 0x0004), .driver_info = DEVTYPE_PANJIT}, 171 #endif 172 173 #ifdef CONFIG_TOUCHSCREEN_USB_3M 174 {USB_DEVICE(0x0596, 0x0001), .driver_info = DEVTYPE_3M}, 175 #endif 176 177 #ifdef CONFIG_TOUCHSCREEN_USB_ITM 178 {USB_DEVICE(0x0403, 0xf9e9), .driver_info = DEVTYPE_ITM}, 179 {USB_DEVICE(0x16e3, 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 {USB_DEVICE(0x6615, 0x0012), .driver_info = DEVTYPE_IRTOUCH_HIRES}, 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 #ifdef CONFIG_TOUCHSCREEN_USB_ELO 242 {USB_DEVICE(0x04e7, 0x0020), .driver_info = DEVTYPE_ELO}, 243 #endif 244 245 #ifdef CONFIG_TOUCHSCREEN_USB_EASYTOUCH 246 {USB_DEVICE(0x7374, 0x0001), .driver_info = DEVTYPE_ETOUCH}, 247 #endif 248 249 {} 250 }; 251 252 253 /***************************************************************************** 254 * e2i Part 255 */ 256 257 #ifdef CONFIG_TOUCHSCREEN_USB_E2I 258 static int e2i_init(struct usbtouch_usb *usbtouch) 259 { 260 int ret; 261 struct usb_device *udev = interface_to_usbdev(usbtouch->interface); 262 263 ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0), 264 0x01, 0x02, 0x0000, 0x0081, 265 NULL, 0, USB_CTRL_SET_TIMEOUT); 266 267 dev_dbg(&usbtouch->interface->dev, 268 "%s - usb_control_msg - E2I_RESET - bytes|err: %d\n", 269 __func__, ret); 270 return ret; 271 } 272 273 static int e2i_read_data(struct usbtouch_usb *dev, unsigned char *pkt) 274 { 275 int tmp = (pkt[0] << 8) | pkt[1]; 276 dev->x = (pkt[2] << 8) | pkt[3]; 277 dev->y = (pkt[4] << 8) | pkt[5]; 278 279 tmp = tmp - 0xA000; 280 dev->touch = (tmp > 0); 281 dev->press = (tmp > 0 ? tmp : 0); 282 283 return 1; 284 } 285 #endif 286 287 288 /***************************************************************************** 289 * eGalax part 290 */ 291 292 #ifdef CONFIG_TOUCHSCREEN_USB_EGALAX 293 294 #ifndef MULTI_PACKET 295 #define MULTI_PACKET 296 #endif 297 298 #define EGALAX_PKT_TYPE_MASK 0xFE 299 #define EGALAX_PKT_TYPE_REPT 0x80 300 #define EGALAX_PKT_TYPE_DIAG 0x0A 301 302 static int egalax_init(struct usbtouch_usb *usbtouch) 303 { 304 int ret, i; 305 unsigned char *buf; 306 struct usb_device *udev = interface_to_usbdev(usbtouch->interface); 307 308 /* 309 * An eGalax diagnostic packet kicks the device into using the right 310 * protocol. We send a "check active" packet. The response will be 311 * read later and ignored. 312 */ 313 314 buf = kmalloc(3, GFP_KERNEL); 315 if (!buf) 316 return -ENOMEM; 317 318 buf[0] = EGALAX_PKT_TYPE_DIAG; 319 buf[1] = 1; /* length */ 320 buf[2] = 'A'; /* command - check active */ 321 322 for (i = 0; i < 3; i++) { 323 ret = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 324 0, 325 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE, 326 0, 0, buf, 3, 327 USB_CTRL_SET_TIMEOUT); 328 if (ret >= 0) { 329 ret = 0; 330 break; 331 } 332 if (ret != -EPIPE) 333 break; 334 } 335 336 kfree(buf); 337 338 return ret; 339 } 340 341 static int egalax_read_data(struct usbtouch_usb *dev, unsigned char *pkt) 342 { 343 if ((pkt[0] & EGALAX_PKT_TYPE_MASK) != EGALAX_PKT_TYPE_REPT) 344 return 0; 345 346 dev->x = ((pkt[3] & 0x0F) << 7) | (pkt[4] & 0x7F); 347 dev->y = ((pkt[1] & 0x0F) << 7) | (pkt[2] & 0x7F); 348 dev->touch = pkt[0] & 0x01; 349 350 return 1; 351 } 352 353 static int egalax_get_pkt_len(unsigned char *buf, int len) 354 { 355 switch (buf[0] & EGALAX_PKT_TYPE_MASK) { 356 case EGALAX_PKT_TYPE_REPT: 357 return 5; 358 359 case EGALAX_PKT_TYPE_DIAG: 360 if (len < 2) 361 return -1; 362 363 return buf[1] + 2; 364 } 365 366 return 0; 367 } 368 #endif 369 370 /***************************************************************************** 371 * EasyTouch part 372 */ 373 374 #ifdef CONFIG_TOUCHSCREEN_USB_EASYTOUCH 375 376 #ifndef MULTI_PACKET 377 #define MULTI_PACKET 378 #endif 379 380 #define ETOUCH_PKT_TYPE_MASK 0xFE 381 #define ETOUCH_PKT_TYPE_REPT 0x80 382 #define ETOUCH_PKT_TYPE_REPT2 0xB0 383 #define ETOUCH_PKT_TYPE_DIAG 0x0A 384 385 static int etouch_read_data(struct usbtouch_usb *dev, unsigned char *pkt) 386 { 387 if ((pkt[0] & ETOUCH_PKT_TYPE_MASK) != ETOUCH_PKT_TYPE_REPT && 388 (pkt[0] & ETOUCH_PKT_TYPE_MASK) != ETOUCH_PKT_TYPE_REPT2) 389 return 0; 390 391 dev->x = ((pkt[1] & 0x1F) << 7) | (pkt[2] & 0x7F); 392 dev->y = ((pkt[3] & 0x1F) << 7) | (pkt[4] & 0x7F); 393 dev->touch = pkt[0] & 0x01; 394 395 return 1; 396 } 397 398 static int etouch_get_pkt_len(unsigned char *buf, int len) 399 { 400 switch (buf[0] & ETOUCH_PKT_TYPE_MASK) { 401 case ETOUCH_PKT_TYPE_REPT: 402 case ETOUCH_PKT_TYPE_REPT2: 403 return 5; 404 405 case ETOUCH_PKT_TYPE_DIAG: 406 if (len < 2) 407 return -1; 408 409 return buf[1] + 2; 410 } 411 412 return 0; 413 } 414 #endif 415 416 /***************************************************************************** 417 * PanJit Part 418 */ 419 #ifdef CONFIG_TOUCHSCREEN_USB_PANJIT 420 static int panjit_read_data(struct usbtouch_usb *dev, unsigned char *pkt) 421 { 422 dev->x = ((pkt[2] & 0x0F) << 8) | pkt[1]; 423 dev->y = ((pkt[4] & 0x0F) << 8) | pkt[3]; 424 dev->touch = pkt[0] & 0x01; 425 426 return 1; 427 } 428 #endif 429 430 431 /***************************************************************************** 432 * 3M/Microtouch Part 433 */ 434 #ifdef CONFIG_TOUCHSCREEN_USB_3M 435 436 #define MTOUCHUSB_ASYNC_REPORT 1 437 #define MTOUCHUSB_RESET 7 438 #define MTOUCHUSB_REQ_CTRLLR_ID 10 439 440 static int mtouch_read_data(struct usbtouch_usb *dev, unsigned char *pkt) 441 { 442 if (hwcalib_xy) { 443 dev->x = (pkt[4] << 8) | pkt[3]; 444 dev->y = 0xffff - ((pkt[6] << 8) | pkt[5]); 445 } else { 446 dev->x = (pkt[8] << 8) | pkt[7]; 447 dev->y = (pkt[10] << 8) | pkt[9]; 448 } 449 dev->touch = (pkt[2] & 0x40) ? 1 : 0; 450 451 return 1; 452 } 453 454 static int mtouch_init(struct usbtouch_usb *usbtouch) 455 { 456 int ret, i; 457 struct usb_device *udev = interface_to_usbdev(usbtouch->interface); 458 459 ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0), 460 MTOUCHUSB_RESET, 461 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE, 462 1, 0, NULL, 0, USB_CTRL_SET_TIMEOUT); 463 dev_dbg(&usbtouch->interface->dev, 464 "%s - usb_control_msg - MTOUCHUSB_RESET - bytes|err: %d\n", 465 __func__, ret); 466 if (ret < 0) 467 return ret; 468 msleep(150); 469 470 for (i = 0; i < 3; i++) { 471 ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0), 472 MTOUCHUSB_ASYNC_REPORT, 473 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE, 474 1, 1, NULL, 0, USB_CTRL_SET_TIMEOUT); 475 dev_dbg(&usbtouch->interface->dev, 476 "%s - usb_control_msg - MTOUCHUSB_ASYNC_REPORT - bytes|err: %d\n", 477 __func__, ret); 478 if (ret >= 0) 479 break; 480 if (ret != -EPIPE) 481 return ret; 482 } 483 484 /* Default min/max xy are the raw values, override if using hw-calib */ 485 if (hwcalib_xy) { 486 input_set_abs_params(usbtouch->input, ABS_X, 0, 0xffff, 0, 0); 487 input_set_abs_params(usbtouch->input, ABS_Y, 0, 0xffff, 0, 0); 488 } 489 490 return 0; 491 } 492 #endif 493 494 495 /***************************************************************************** 496 * ITM Part 497 */ 498 #ifdef CONFIG_TOUCHSCREEN_USB_ITM 499 static int itm_read_data(struct usbtouch_usb *dev, unsigned char *pkt) 500 { 501 int touch; 502 /* 503 * ITM devices report invalid x/y data if not touched. 504 * if the screen was touched before but is not touched any more 505 * report touch as 0 with the last valid x/y data once. then stop 506 * reporting data until touched again. 507 */ 508 dev->press = ((pkt[2] & 0x01) << 7) | (pkt[5] & 0x7F); 509 510 touch = ~pkt[7] & 0x20; 511 if (!touch) { 512 if (dev->touch) { 513 dev->touch = 0; 514 return 1; 515 } 516 517 return 0; 518 } 519 520 dev->x = ((pkt[0] & 0x1F) << 7) | (pkt[3] & 0x7F); 521 dev->y = ((pkt[1] & 0x1F) << 7) | (pkt[4] & 0x7F); 522 dev->touch = touch; 523 524 return 1; 525 } 526 #endif 527 528 529 /***************************************************************************** 530 * eTurboTouch part 531 */ 532 #ifdef CONFIG_TOUCHSCREEN_USB_ETURBO 533 #ifndef MULTI_PACKET 534 #define MULTI_PACKET 535 #endif 536 static int eturbo_read_data(struct usbtouch_usb *dev, unsigned char *pkt) 537 { 538 unsigned int shift; 539 540 /* packets should start with sync */ 541 if (!(pkt[0] & 0x80)) 542 return 0; 543 544 shift = (6 - (pkt[0] & 0x03)); 545 dev->x = ((pkt[3] << 7) | pkt[4]) >> shift; 546 dev->y = ((pkt[1] << 7) | pkt[2]) >> shift; 547 dev->touch = (pkt[0] & 0x10) ? 1 : 0; 548 549 return 1; 550 } 551 552 static int eturbo_get_pkt_len(unsigned char *buf, int len) 553 { 554 if (buf[0] & 0x80) 555 return 5; 556 if (buf[0] == 0x01) 557 return 3; 558 return 0; 559 } 560 #endif 561 562 563 /***************************************************************************** 564 * Gunze part 565 */ 566 #ifdef CONFIG_TOUCHSCREEN_USB_GUNZE 567 static int gunze_read_data(struct usbtouch_usb *dev, unsigned char *pkt) 568 { 569 if (!(pkt[0] & 0x80) || ((pkt[1] | pkt[2] | pkt[3]) & 0x80)) 570 return 0; 571 572 dev->x = ((pkt[0] & 0x1F) << 7) | (pkt[2] & 0x7F); 573 dev->y = ((pkt[1] & 0x1F) << 7) | (pkt[3] & 0x7F); 574 dev->touch = pkt[0] & 0x20; 575 576 return 1; 577 } 578 #endif 579 580 /***************************************************************************** 581 * DMC TSC-10/25 Part 582 * 583 * Documentation about the controller and it's protocol can be found at 584 * http://www.dmccoltd.com/files/controler/tsc10usb_pi_e.pdf 585 * http://www.dmccoltd.com/files/controler/tsc25_usb_e.pdf 586 */ 587 #ifdef CONFIG_TOUCHSCREEN_USB_DMC_TSC10 588 589 /* supported data rates. currently using 130 */ 590 #define TSC10_RATE_POINT 0x50 591 #define TSC10_RATE_30 0x40 592 #define TSC10_RATE_50 0x41 593 #define TSC10_RATE_80 0x42 594 #define TSC10_RATE_100 0x43 595 #define TSC10_RATE_130 0x44 596 #define TSC10_RATE_150 0x45 597 598 /* commands */ 599 #define TSC10_CMD_RESET 0x55 600 #define TSC10_CMD_RATE 0x05 601 #define TSC10_CMD_DATA1 0x01 602 603 static int dmc_tsc10_init(struct usbtouch_usb *usbtouch) 604 { 605 struct usb_device *dev = interface_to_usbdev(usbtouch->interface); 606 int ret = -ENOMEM; 607 unsigned char *buf; 608 609 buf = kmalloc(2, GFP_NOIO); 610 if (!buf) 611 goto err_nobuf; 612 /* reset */ 613 buf[0] = buf[1] = 0xFF; 614 ret = usb_control_msg(dev, usb_rcvctrlpipe (dev, 0), 615 TSC10_CMD_RESET, 616 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE, 617 0, 0, buf, 2, USB_CTRL_SET_TIMEOUT); 618 if (ret < 0) 619 goto err_out; 620 if (buf[0] != 0x06) { 621 ret = -ENODEV; 622 goto err_out; 623 } 624 625 /* TSC-25 data sheet specifies a delay after the RESET command */ 626 msleep(150); 627 628 /* set coordinate output rate */ 629 buf[0] = buf[1] = 0xFF; 630 ret = usb_control_msg(dev, usb_rcvctrlpipe (dev, 0), 631 TSC10_CMD_RATE, 632 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE, 633 TSC10_RATE_150, 0, buf, 2, USB_CTRL_SET_TIMEOUT); 634 if (ret < 0) 635 goto err_out; 636 if ((buf[0] != 0x06) && (buf[0] != 0x15 || buf[1] != 0x01)) { 637 ret = -ENODEV; 638 goto err_out; 639 } 640 641 /* start sending data */ 642 ret = usb_control_msg(dev, usb_rcvctrlpipe (dev, 0), 643 TSC10_CMD_DATA1, 644 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE, 645 0, 0, NULL, 0, USB_CTRL_SET_TIMEOUT); 646 err_out: 647 kfree(buf); 648 err_nobuf: 649 return ret; 650 } 651 652 653 static int dmc_tsc10_read_data(struct usbtouch_usb *dev, unsigned char *pkt) 654 { 655 dev->x = ((pkt[2] & 0x03) << 8) | pkt[1]; 656 dev->y = ((pkt[4] & 0x03) << 8) | pkt[3]; 657 dev->touch = pkt[0] & 0x01; 658 659 return 1; 660 } 661 #endif 662 663 664 /***************************************************************************** 665 * IRTOUCH Part 666 */ 667 #ifdef CONFIG_TOUCHSCREEN_USB_IRTOUCH 668 static int irtouch_read_data(struct usbtouch_usb *dev, unsigned char *pkt) 669 { 670 dev->x = (pkt[3] << 8) | pkt[2]; 671 dev->y = (pkt[5] << 8) | pkt[4]; 672 dev->touch = (pkt[1] & 0x03) ? 1 : 0; 673 674 return 1; 675 } 676 #endif 677 678 /***************************************************************************** 679 * ET&T TC5UH/TC4UM part 680 */ 681 #ifdef CONFIG_TOUCHSCREEN_USB_ETT_TC45USB 682 static int tc45usb_read_data(struct usbtouch_usb *dev, unsigned char *pkt) 683 { 684 dev->x = ((pkt[2] & 0x0F) << 8) | pkt[1]; 685 dev->y = ((pkt[4] & 0x0F) << 8) | pkt[3]; 686 dev->touch = pkt[0] & 0x01; 687 688 return 1; 689 } 690 #endif 691 692 /***************************************************************************** 693 * IdealTEK URTC1000 Part 694 */ 695 #ifdef CONFIG_TOUCHSCREEN_USB_IDEALTEK 696 #ifndef MULTI_PACKET 697 #define MULTI_PACKET 698 #endif 699 static int idealtek_get_pkt_len(unsigned char *buf, int len) 700 { 701 if (buf[0] & 0x80) 702 return 5; 703 if (buf[0] == 0x01) 704 return len; 705 return 0; 706 } 707 708 static int idealtek_read_data(struct usbtouch_usb *dev, unsigned char *pkt) 709 { 710 switch (pkt[0] & 0x98) { 711 case 0x88: 712 /* touch data in IdealTEK mode */ 713 dev->x = (pkt[1] << 5) | (pkt[2] >> 2); 714 dev->y = (pkt[3] << 5) | (pkt[4] >> 2); 715 dev->touch = (pkt[0] & 0x40) ? 1 : 0; 716 return 1; 717 718 case 0x98: 719 /* touch data in MT emulation mode */ 720 dev->x = (pkt[2] << 5) | (pkt[1] >> 2); 721 dev->y = (pkt[4] << 5) | (pkt[3] >> 2); 722 dev->touch = (pkt[0] & 0x40) ? 1 : 0; 723 return 1; 724 725 default: 726 return 0; 727 } 728 } 729 #endif 730 731 /***************************************************************************** 732 * General Touch Part 733 */ 734 #ifdef CONFIG_TOUCHSCREEN_USB_GENERAL_TOUCH 735 static int general_touch_read_data(struct usbtouch_usb *dev, unsigned char *pkt) 736 { 737 dev->x = (pkt[2] << 8) | pkt[1]; 738 dev->y = (pkt[4] << 8) | pkt[3]; 739 dev->press = pkt[5] & 0xff; 740 dev->touch = pkt[0] & 0x01; 741 742 return 1; 743 } 744 #endif 745 746 /***************************************************************************** 747 * GoTop Part 748 */ 749 #ifdef CONFIG_TOUCHSCREEN_USB_GOTOP 750 static int gotop_read_data(struct usbtouch_usb *dev, unsigned char *pkt) 751 { 752 dev->x = ((pkt[1] & 0x38) << 4) | pkt[2]; 753 dev->y = ((pkt[1] & 0x07) << 7) | pkt[3]; 754 dev->touch = pkt[0] & 0x01; 755 756 return 1; 757 } 758 #endif 759 760 /***************************************************************************** 761 * JASTEC Part 762 */ 763 #ifdef CONFIG_TOUCHSCREEN_USB_JASTEC 764 static int jastec_read_data(struct usbtouch_usb *dev, unsigned char *pkt) 765 { 766 dev->x = ((pkt[0] & 0x3f) << 6) | (pkt[2] & 0x3f); 767 dev->y = ((pkt[1] & 0x3f) << 6) | (pkt[3] & 0x3f); 768 dev->touch = (pkt[0] & 0x40) >> 6; 769 770 return 1; 771 } 772 #endif 773 774 /***************************************************************************** 775 * Zytronic Part 776 */ 777 #ifdef CONFIG_TOUCHSCREEN_USB_ZYTRONIC 778 static int zytronic_read_data(struct usbtouch_usb *dev, unsigned char *pkt) 779 { 780 struct usb_interface *intf = dev->interface; 781 782 switch (pkt[0]) { 783 case 0x3A: /* command response */ 784 dev_dbg(&intf->dev, "%s: Command response %d\n", __func__, pkt[1]); 785 break; 786 787 case 0xC0: /* down */ 788 dev->x = (pkt[1] & 0x7f) | ((pkt[2] & 0x07) << 7); 789 dev->y = (pkt[3] & 0x7f) | ((pkt[4] & 0x07) << 7); 790 dev->touch = 1; 791 dev_dbg(&intf->dev, "%s: down %d,%d\n", __func__, dev->x, dev->y); 792 return 1; 793 794 case 0x80: /* up */ 795 dev->x = (pkt[1] & 0x7f) | ((pkt[2] & 0x07) << 7); 796 dev->y = (pkt[3] & 0x7f) | ((pkt[4] & 0x07) << 7); 797 dev->touch = 0; 798 dev_dbg(&intf->dev, "%s: up %d,%d\n", __func__, dev->x, dev->y); 799 return 1; 800 801 default: 802 dev_dbg(&intf->dev, "%s: Unknown return %d\n", __func__, pkt[0]); 803 break; 804 } 805 806 return 0; 807 } 808 #endif 809 810 /***************************************************************************** 811 * NEXIO Part 812 */ 813 #ifdef CONFIG_TOUCHSCREEN_USB_NEXIO 814 815 #define NEXIO_TIMEOUT 5000 816 #define NEXIO_BUFSIZE 1024 817 #define NEXIO_THRESHOLD 50 818 819 struct nexio_priv { 820 struct urb *ack; 821 unsigned char *ack_buf; 822 }; 823 824 struct nexio_touch_packet { 825 u8 flags; /* 0xe1 = touch, 0xe1 = release */ 826 __be16 data_len; /* total bytes of touch data */ 827 __be16 x_len; /* bytes for X axis */ 828 __be16 y_len; /* bytes for Y axis */ 829 u8 data[]; 830 } __attribute__ ((packed)); 831 832 static unsigned char nexio_ack_pkt[2] = { 0xaa, 0x02 }; 833 static unsigned char nexio_init_pkt[4] = { 0x82, 0x04, 0x0a, 0x0f }; 834 835 static void nexio_ack_complete(struct urb *urb) 836 { 837 } 838 839 static int nexio_alloc(struct usbtouch_usb *usbtouch) 840 { 841 struct nexio_priv *priv; 842 int ret = -ENOMEM; 843 844 usbtouch->priv = kmalloc(sizeof(struct nexio_priv), GFP_KERNEL); 845 if (!usbtouch->priv) 846 goto out_buf; 847 848 priv = usbtouch->priv; 849 850 priv->ack_buf = kmemdup(nexio_ack_pkt, sizeof(nexio_ack_pkt), 851 GFP_KERNEL); 852 if (!priv->ack_buf) 853 goto err_priv; 854 855 priv->ack = usb_alloc_urb(0, GFP_KERNEL); 856 if (!priv->ack) { 857 dev_dbg(&usbtouch->interface->dev, 858 "%s - usb_alloc_urb failed: usbtouch->ack\n", __func__); 859 goto err_ack_buf; 860 } 861 862 return 0; 863 864 err_ack_buf: 865 kfree(priv->ack_buf); 866 err_priv: 867 kfree(priv); 868 out_buf: 869 return ret; 870 } 871 872 static int nexio_init(struct usbtouch_usb *usbtouch) 873 { 874 struct usb_device *dev = interface_to_usbdev(usbtouch->interface); 875 struct usb_host_interface *interface = usbtouch->interface->cur_altsetting; 876 struct nexio_priv *priv = usbtouch->priv; 877 int ret = -ENOMEM; 878 int actual_len, i; 879 unsigned char *buf; 880 char *firmware_ver = NULL, *device_name = NULL; 881 int input_ep = 0, output_ep = 0; 882 883 /* find first input and output endpoint */ 884 for (i = 0; i < interface->desc.bNumEndpoints; i++) { 885 if (!input_ep && 886 usb_endpoint_dir_in(&interface->endpoint[i].desc)) 887 input_ep = interface->endpoint[i].desc.bEndpointAddress; 888 if (!output_ep && 889 usb_endpoint_dir_out(&interface->endpoint[i].desc)) 890 output_ep = interface->endpoint[i].desc.bEndpointAddress; 891 } 892 if (!input_ep || !output_ep) 893 return -ENXIO; 894 895 buf = kmalloc(NEXIO_BUFSIZE, GFP_NOIO); 896 if (!buf) 897 goto out_buf; 898 899 /* two empty reads */ 900 for (i = 0; i < 2; i++) { 901 ret = usb_bulk_msg(dev, usb_rcvbulkpipe(dev, input_ep), 902 buf, NEXIO_BUFSIZE, &actual_len, 903 NEXIO_TIMEOUT); 904 if (ret < 0) 905 goto out_buf; 906 } 907 908 /* send init command */ 909 memcpy(buf, nexio_init_pkt, sizeof(nexio_init_pkt)); 910 ret = usb_bulk_msg(dev, usb_sndbulkpipe(dev, output_ep), 911 buf, sizeof(nexio_init_pkt), &actual_len, 912 NEXIO_TIMEOUT); 913 if (ret < 0) 914 goto out_buf; 915 916 /* read replies */ 917 for (i = 0; i < 3; i++) { 918 memset(buf, 0, NEXIO_BUFSIZE); 919 ret = usb_bulk_msg(dev, usb_rcvbulkpipe(dev, input_ep), 920 buf, NEXIO_BUFSIZE, &actual_len, 921 NEXIO_TIMEOUT); 922 if (ret < 0 || actual_len < 1 || buf[1] != actual_len) 923 continue; 924 switch (buf[0]) { 925 case 0x83: /* firmware version */ 926 if (!firmware_ver) 927 firmware_ver = kstrdup(&buf[2], GFP_NOIO); 928 break; 929 case 0x84: /* device name */ 930 if (!device_name) 931 device_name = kstrdup(&buf[2], GFP_NOIO); 932 break; 933 } 934 } 935 936 printk(KERN_INFO "Nexio device: %s, firmware version: %s\n", 937 device_name, firmware_ver); 938 939 kfree(firmware_ver); 940 kfree(device_name); 941 942 usb_fill_bulk_urb(priv->ack, dev, usb_sndbulkpipe(dev, output_ep), 943 priv->ack_buf, sizeof(nexio_ack_pkt), 944 nexio_ack_complete, usbtouch); 945 ret = 0; 946 947 out_buf: 948 kfree(buf); 949 return ret; 950 } 951 952 static void nexio_exit(struct usbtouch_usb *usbtouch) 953 { 954 struct nexio_priv *priv = usbtouch->priv; 955 956 usb_kill_urb(priv->ack); 957 usb_free_urb(priv->ack); 958 kfree(priv->ack_buf); 959 kfree(priv); 960 } 961 962 static int nexio_read_data(struct usbtouch_usb *usbtouch, unsigned char *pkt) 963 { 964 struct nexio_touch_packet *packet = (void *) pkt; 965 struct nexio_priv *priv = usbtouch->priv; 966 unsigned int data_len = be16_to_cpu(packet->data_len); 967 unsigned int x_len = be16_to_cpu(packet->x_len); 968 unsigned int y_len = be16_to_cpu(packet->y_len); 969 int x, y, begin_x, begin_y, end_x, end_y, w, h, ret; 970 971 /* got touch data? */ 972 if ((pkt[0] & 0xe0) != 0xe0) 973 return 0; 974 975 if (data_len > 0xff) 976 data_len -= 0x100; 977 if (x_len > 0xff) 978 x_len -= 0x80; 979 980 /* send ACK */ 981 ret = usb_submit_urb(priv->ack, GFP_ATOMIC); 982 983 if (!usbtouch->type->max_xc) { 984 usbtouch->type->max_xc = 2 * x_len; 985 input_set_abs_params(usbtouch->input, ABS_X, 986 0, usbtouch->type->max_xc, 0, 0); 987 usbtouch->type->max_yc = 2 * y_len; 988 input_set_abs_params(usbtouch->input, ABS_Y, 989 0, usbtouch->type->max_yc, 0, 0); 990 } 991 /* 992 * The device reports state of IR sensors on X and Y axes. 993 * Each byte represents "darkness" percentage (0-100) of one element. 994 * 17" touchscreen reports only 64 x 52 bytes so the resolution is low. 995 * This also means that there's a limited multi-touch capability but 996 * it's disabled (and untested) here as there's no X driver for that. 997 */ 998 begin_x = end_x = begin_y = end_y = -1; 999 for (x = 0; x < x_len; x++) { 1000 if (begin_x == -1 && packet->data[x] > NEXIO_THRESHOLD) { 1001 begin_x = x; 1002 continue; 1003 } 1004 if (end_x == -1 && begin_x != -1 && packet->data[x] < NEXIO_THRESHOLD) { 1005 end_x = x - 1; 1006 for (y = x_len; y < data_len; y++) { 1007 if (begin_y == -1 && packet->data[y] > NEXIO_THRESHOLD) { 1008 begin_y = y - x_len; 1009 continue; 1010 } 1011 if (end_y == -1 && 1012 begin_y != -1 && packet->data[y] < NEXIO_THRESHOLD) { 1013 end_y = y - 1 - x_len; 1014 w = end_x - begin_x; 1015 h = end_y - begin_y; 1016 #if 0 1017 /* multi-touch */ 1018 input_report_abs(usbtouch->input, 1019 ABS_MT_TOUCH_MAJOR, max(w,h)); 1020 input_report_abs(usbtouch->input, 1021 ABS_MT_TOUCH_MINOR, min(x,h)); 1022 input_report_abs(usbtouch->input, 1023 ABS_MT_POSITION_X, 2*begin_x+w); 1024 input_report_abs(usbtouch->input, 1025 ABS_MT_POSITION_Y, 2*begin_y+h); 1026 input_report_abs(usbtouch->input, 1027 ABS_MT_ORIENTATION, w > h); 1028 input_mt_sync(usbtouch->input); 1029 #endif 1030 /* single touch */ 1031 usbtouch->x = 2 * begin_x + w; 1032 usbtouch->y = 2 * begin_y + h; 1033 usbtouch->touch = packet->flags & 0x01; 1034 begin_y = end_y = -1; 1035 return 1; 1036 } 1037 } 1038 begin_x = end_x = -1; 1039 } 1040 1041 } 1042 return 0; 1043 } 1044 #endif 1045 1046 1047 /***************************************************************************** 1048 * ELO part 1049 */ 1050 1051 #ifdef CONFIG_TOUCHSCREEN_USB_ELO 1052 1053 static int elo_read_data(struct usbtouch_usb *dev, unsigned char *pkt) 1054 { 1055 dev->x = (pkt[3] << 8) | pkt[2]; 1056 dev->y = (pkt[5] << 8) | pkt[4]; 1057 dev->touch = pkt[6] > 0; 1058 dev->press = pkt[6]; 1059 1060 return 1; 1061 } 1062 #endif 1063 1064 1065 /***************************************************************************** 1066 * the different device descriptors 1067 */ 1068 #ifdef MULTI_PACKET 1069 static void usbtouch_process_multi(struct usbtouch_usb *usbtouch, 1070 unsigned char *pkt, int len); 1071 #endif 1072 1073 static struct usbtouch_device_info usbtouch_dev_info[] = { 1074 #ifdef CONFIG_TOUCHSCREEN_USB_ELO 1075 [DEVTYPE_ELO] = { 1076 .min_xc = 0x0, 1077 .max_xc = 0x0fff, 1078 .min_yc = 0x0, 1079 .max_yc = 0x0fff, 1080 .max_press = 0xff, 1081 .rept_size = 8, 1082 .read_data = elo_read_data, 1083 }, 1084 #endif 1085 1086 #ifdef CONFIG_TOUCHSCREEN_USB_EGALAX 1087 [DEVTYPE_EGALAX] = { 1088 .min_xc = 0x0, 1089 .max_xc = 0x07ff, 1090 .min_yc = 0x0, 1091 .max_yc = 0x07ff, 1092 .rept_size = 16, 1093 .process_pkt = usbtouch_process_multi, 1094 .get_pkt_len = egalax_get_pkt_len, 1095 .read_data = egalax_read_data, 1096 .init = egalax_init, 1097 }, 1098 #endif 1099 1100 #ifdef CONFIG_TOUCHSCREEN_USB_PANJIT 1101 [DEVTYPE_PANJIT] = { 1102 .min_xc = 0x0, 1103 .max_xc = 0x0fff, 1104 .min_yc = 0x0, 1105 .max_yc = 0x0fff, 1106 .rept_size = 8, 1107 .read_data = panjit_read_data, 1108 }, 1109 #endif 1110 1111 #ifdef CONFIG_TOUCHSCREEN_USB_3M 1112 [DEVTYPE_3M] = { 1113 .min_xc = 0x0, 1114 .max_xc = 0x4000, 1115 .min_yc = 0x0, 1116 .max_yc = 0x4000, 1117 .rept_size = 11, 1118 .read_data = mtouch_read_data, 1119 .init = mtouch_init, 1120 }, 1121 #endif 1122 1123 #ifdef CONFIG_TOUCHSCREEN_USB_ITM 1124 [DEVTYPE_ITM] = { 1125 .min_xc = 0x0, 1126 .max_xc = 0x0fff, 1127 .min_yc = 0x0, 1128 .max_yc = 0x0fff, 1129 .max_press = 0xff, 1130 .rept_size = 8, 1131 .read_data = itm_read_data, 1132 }, 1133 #endif 1134 1135 #ifdef CONFIG_TOUCHSCREEN_USB_ETURBO 1136 [DEVTYPE_ETURBO] = { 1137 .min_xc = 0x0, 1138 .max_xc = 0x07ff, 1139 .min_yc = 0x0, 1140 .max_yc = 0x07ff, 1141 .rept_size = 8, 1142 .process_pkt = usbtouch_process_multi, 1143 .get_pkt_len = eturbo_get_pkt_len, 1144 .read_data = eturbo_read_data, 1145 }, 1146 #endif 1147 1148 #ifdef CONFIG_TOUCHSCREEN_USB_GUNZE 1149 [DEVTYPE_GUNZE] = { 1150 .min_xc = 0x0, 1151 .max_xc = 0x0fff, 1152 .min_yc = 0x0, 1153 .max_yc = 0x0fff, 1154 .rept_size = 4, 1155 .read_data = gunze_read_data, 1156 }, 1157 #endif 1158 1159 #ifdef CONFIG_TOUCHSCREEN_USB_DMC_TSC10 1160 [DEVTYPE_DMC_TSC10] = { 1161 .min_xc = 0x0, 1162 .max_xc = 0x03ff, 1163 .min_yc = 0x0, 1164 .max_yc = 0x03ff, 1165 .rept_size = 5, 1166 .init = dmc_tsc10_init, 1167 .read_data = dmc_tsc10_read_data, 1168 }, 1169 #endif 1170 1171 #ifdef CONFIG_TOUCHSCREEN_USB_IRTOUCH 1172 [DEVTYPE_IRTOUCH] = { 1173 .min_xc = 0x0, 1174 .max_xc = 0x0fff, 1175 .min_yc = 0x0, 1176 .max_yc = 0x0fff, 1177 .rept_size = 8, 1178 .read_data = irtouch_read_data, 1179 }, 1180 1181 [DEVTYPE_IRTOUCH_HIRES] = { 1182 .min_xc = 0x0, 1183 .max_xc = 0x7fff, 1184 .min_yc = 0x0, 1185 .max_yc = 0x7fff, 1186 .rept_size = 8, 1187 .read_data = irtouch_read_data, 1188 }, 1189 #endif 1190 1191 #ifdef CONFIG_TOUCHSCREEN_USB_IDEALTEK 1192 [DEVTYPE_IDEALTEK] = { 1193 .min_xc = 0x0, 1194 .max_xc = 0x0fff, 1195 .min_yc = 0x0, 1196 .max_yc = 0x0fff, 1197 .rept_size = 8, 1198 .process_pkt = usbtouch_process_multi, 1199 .get_pkt_len = idealtek_get_pkt_len, 1200 .read_data = idealtek_read_data, 1201 }, 1202 #endif 1203 1204 #ifdef CONFIG_TOUCHSCREEN_USB_GENERAL_TOUCH 1205 [DEVTYPE_GENERAL_TOUCH] = { 1206 .min_xc = 0x0, 1207 .max_xc = 0x7fff, 1208 .min_yc = 0x0, 1209 .max_yc = 0x7fff, 1210 .rept_size = 7, 1211 .read_data = general_touch_read_data, 1212 }, 1213 #endif 1214 1215 #ifdef CONFIG_TOUCHSCREEN_USB_GOTOP 1216 [DEVTYPE_GOTOP] = { 1217 .min_xc = 0x0, 1218 .max_xc = 0x03ff, 1219 .min_yc = 0x0, 1220 .max_yc = 0x03ff, 1221 .rept_size = 4, 1222 .read_data = gotop_read_data, 1223 }, 1224 #endif 1225 1226 #ifdef CONFIG_TOUCHSCREEN_USB_JASTEC 1227 [DEVTYPE_JASTEC] = { 1228 .min_xc = 0x0, 1229 .max_xc = 0x0fff, 1230 .min_yc = 0x0, 1231 .max_yc = 0x0fff, 1232 .rept_size = 4, 1233 .read_data = jastec_read_data, 1234 }, 1235 #endif 1236 1237 #ifdef CONFIG_TOUCHSCREEN_USB_E2I 1238 [DEVTYPE_E2I] = { 1239 .min_xc = 0x0, 1240 .max_xc = 0x7fff, 1241 .min_yc = 0x0, 1242 .max_yc = 0x7fff, 1243 .rept_size = 6, 1244 .init = e2i_init, 1245 .read_data = e2i_read_data, 1246 }, 1247 #endif 1248 1249 #ifdef CONFIG_TOUCHSCREEN_USB_ZYTRONIC 1250 [DEVTYPE_ZYTRONIC] = { 1251 .min_xc = 0x0, 1252 .max_xc = 0x03ff, 1253 .min_yc = 0x0, 1254 .max_yc = 0x03ff, 1255 .rept_size = 5, 1256 .read_data = zytronic_read_data, 1257 .irq_always = true, 1258 }, 1259 #endif 1260 1261 #ifdef CONFIG_TOUCHSCREEN_USB_ETT_TC45USB 1262 [DEVTYPE_TC45USB] = { 1263 .min_xc = 0x0, 1264 .max_xc = 0x0fff, 1265 .min_yc = 0x0, 1266 .max_yc = 0x0fff, 1267 .rept_size = 5, 1268 .read_data = tc45usb_read_data, 1269 }, 1270 #endif 1271 1272 #ifdef CONFIG_TOUCHSCREEN_USB_NEXIO 1273 [DEVTYPE_NEXIO] = { 1274 .rept_size = 1024, 1275 .irq_always = true, 1276 .read_data = nexio_read_data, 1277 .alloc = nexio_alloc, 1278 .init = nexio_init, 1279 .exit = nexio_exit, 1280 }, 1281 #endif 1282 #ifdef CONFIG_TOUCHSCREEN_USB_EASYTOUCH 1283 [DEVTYPE_ETOUCH] = { 1284 .min_xc = 0x0, 1285 .max_xc = 0x07ff, 1286 .min_yc = 0x0, 1287 .max_yc = 0x07ff, 1288 .rept_size = 16, 1289 .process_pkt = usbtouch_process_multi, 1290 .get_pkt_len = etouch_get_pkt_len, 1291 .read_data = etouch_read_data, 1292 }, 1293 #endif 1294 }; 1295 1296 1297 /***************************************************************************** 1298 * Generic Part 1299 */ 1300 static void usbtouch_process_pkt(struct usbtouch_usb *usbtouch, 1301 unsigned char *pkt, int len) 1302 { 1303 struct usbtouch_device_info *type = usbtouch->type; 1304 1305 if (!type->read_data(usbtouch, pkt)) 1306 return; 1307 1308 input_report_key(usbtouch->input, BTN_TOUCH, usbtouch->touch); 1309 1310 if (swap_xy) { 1311 input_report_abs(usbtouch->input, ABS_X, usbtouch->y); 1312 input_report_abs(usbtouch->input, ABS_Y, usbtouch->x); 1313 } else { 1314 input_report_abs(usbtouch->input, ABS_X, usbtouch->x); 1315 input_report_abs(usbtouch->input, ABS_Y, usbtouch->y); 1316 } 1317 if (type->max_press) 1318 input_report_abs(usbtouch->input, ABS_PRESSURE, usbtouch->press); 1319 input_sync(usbtouch->input); 1320 } 1321 1322 1323 #ifdef MULTI_PACKET 1324 static void usbtouch_process_multi(struct usbtouch_usb *usbtouch, 1325 unsigned char *pkt, int len) 1326 { 1327 unsigned char *buffer; 1328 int pkt_len, pos, buf_len, tmp; 1329 1330 /* process buffer */ 1331 if (unlikely(usbtouch->buf_len)) { 1332 /* try to get size */ 1333 pkt_len = usbtouch->type->get_pkt_len( 1334 usbtouch->buffer, usbtouch->buf_len); 1335 1336 /* drop? */ 1337 if (unlikely(!pkt_len)) 1338 goto out_flush_buf; 1339 1340 /* need to append -pkt_len bytes before able to get size */ 1341 if (unlikely(pkt_len < 0)) { 1342 int append = -pkt_len; 1343 if (unlikely(append > len)) 1344 append = len; 1345 if (usbtouch->buf_len + append >= usbtouch->type->rept_size) 1346 goto out_flush_buf; 1347 memcpy(usbtouch->buffer + usbtouch->buf_len, pkt, append); 1348 usbtouch->buf_len += append; 1349 1350 pkt_len = usbtouch->type->get_pkt_len( 1351 usbtouch->buffer, usbtouch->buf_len); 1352 if (pkt_len < 0) 1353 return; 1354 } 1355 1356 /* append */ 1357 tmp = pkt_len - usbtouch->buf_len; 1358 if (usbtouch->buf_len + tmp >= usbtouch->type->rept_size) 1359 goto out_flush_buf; 1360 memcpy(usbtouch->buffer + usbtouch->buf_len, pkt, tmp); 1361 usbtouch_process_pkt(usbtouch, usbtouch->buffer, pkt_len); 1362 1363 buffer = pkt + tmp; 1364 buf_len = len - tmp; 1365 } else { 1366 buffer = pkt; 1367 buf_len = len; 1368 } 1369 1370 /* loop over the received packet, process */ 1371 pos = 0; 1372 while (pos < buf_len) { 1373 /* get packet len */ 1374 pkt_len = usbtouch->type->get_pkt_len(buffer + pos, 1375 buf_len - pos); 1376 1377 /* unknown packet: skip one byte */ 1378 if (unlikely(!pkt_len)) { 1379 pos++; 1380 continue; 1381 } 1382 1383 /* full packet: process */ 1384 if (likely((pkt_len > 0) && (pkt_len <= buf_len - pos))) { 1385 usbtouch_process_pkt(usbtouch, buffer + pos, pkt_len); 1386 } else { 1387 /* incomplete packet: save in buffer */ 1388 memcpy(usbtouch->buffer, buffer + pos, buf_len - pos); 1389 usbtouch->buf_len = buf_len - pos; 1390 return; 1391 } 1392 pos += pkt_len; 1393 } 1394 1395 out_flush_buf: 1396 usbtouch->buf_len = 0; 1397 return; 1398 } 1399 #endif 1400 1401 1402 static void usbtouch_irq(struct urb *urb) 1403 { 1404 struct usbtouch_usb *usbtouch = urb->context; 1405 struct device *dev = &usbtouch->interface->dev; 1406 int retval; 1407 1408 switch (urb->status) { 1409 case 0: 1410 /* success */ 1411 break; 1412 case -ETIME: 1413 /* this urb is timing out */ 1414 dev_dbg(dev, 1415 "%s - urb timed out - was the device unplugged?\n", 1416 __func__); 1417 return; 1418 case -ECONNRESET: 1419 case -ENOENT: 1420 case -ESHUTDOWN: 1421 case -EPIPE: 1422 /* this urb is terminated, clean up */ 1423 dev_dbg(dev, "%s - urb shutting down with status: %d\n", 1424 __func__, urb->status); 1425 return; 1426 default: 1427 dev_dbg(dev, "%s - nonzero urb status received: %d\n", 1428 __func__, urb->status); 1429 goto exit; 1430 } 1431 1432 usbtouch->type->process_pkt(usbtouch, usbtouch->data, urb->actual_length); 1433 1434 exit: 1435 usb_mark_last_busy(interface_to_usbdev(usbtouch->interface)); 1436 retval = usb_submit_urb(urb, GFP_ATOMIC); 1437 if (retval) 1438 dev_err(dev, "%s - usb_submit_urb failed with result: %d\n", 1439 __func__, retval); 1440 } 1441 1442 static int usbtouch_open(struct input_dev *input) 1443 { 1444 struct usbtouch_usb *usbtouch = input_get_drvdata(input); 1445 int r; 1446 1447 usbtouch->irq->dev = interface_to_usbdev(usbtouch->interface); 1448 1449 r = usb_autopm_get_interface(usbtouch->interface) ? -EIO : 0; 1450 if (r < 0) 1451 goto out; 1452 1453 if (!usbtouch->type->irq_always) { 1454 if (usb_submit_urb(usbtouch->irq, GFP_KERNEL)) { 1455 r = -EIO; 1456 goto out_put; 1457 } 1458 } 1459 1460 usbtouch->interface->needs_remote_wakeup = 1; 1461 out_put: 1462 usb_autopm_put_interface(usbtouch->interface); 1463 out: 1464 return r; 1465 } 1466 1467 static void usbtouch_close(struct input_dev *input) 1468 { 1469 struct usbtouch_usb *usbtouch = input_get_drvdata(input); 1470 int r; 1471 1472 if (!usbtouch->type->irq_always) 1473 usb_kill_urb(usbtouch->irq); 1474 r = usb_autopm_get_interface(usbtouch->interface); 1475 usbtouch->interface->needs_remote_wakeup = 0; 1476 if (!r) 1477 usb_autopm_put_interface(usbtouch->interface); 1478 } 1479 1480 static int usbtouch_suspend 1481 (struct usb_interface *intf, pm_message_t message) 1482 { 1483 struct usbtouch_usb *usbtouch = usb_get_intfdata(intf); 1484 1485 usb_kill_urb(usbtouch->irq); 1486 1487 return 0; 1488 } 1489 1490 static int usbtouch_resume(struct usb_interface *intf) 1491 { 1492 struct usbtouch_usb *usbtouch = usb_get_intfdata(intf); 1493 struct input_dev *input = usbtouch->input; 1494 int result = 0; 1495 1496 mutex_lock(&input->mutex); 1497 if (input->users || usbtouch->type->irq_always) 1498 result = usb_submit_urb(usbtouch->irq, GFP_NOIO); 1499 mutex_unlock(&input->mutex); 1500 1501 return result; 1502 } 1503 1504 static int usbtouch_reset_resume(struct usb_interface *intf) 1505 { 1506 struct usbtouch_usb *usbtouch = usb_get_intfdata(intf); 1507 struct input_dev *input = usbtouch->input; 1508 int err = 0; 1509 1510 /* reinit the device */ 1511 if (usbtouch->type->init) { 1512 err = usbtouch->type->init(usbtouch); 1513 if (err) { 1514 dev_dbg(&intf->dev, 1515 "%s - type->init() failed, err: %d\n", 1516 __func__, err); 1517 return err; 1518 } 1519 } 1520 1521 /* restart IO if needed */ 1522 mutex_lock(&input->mutex); 1523 if (input->users) 1524 err = usb_submit_urb(usbtouch->irq, GFP_NOIO); 1525 mutex_unlock(&input->mutex); 1526 1527 return err; 1528 } 1529 1530 static void usbtouch_free_buffers(struct usb_device *udev, 1531 struct usbtouch_usb *usbtouch) 1532 { 1533 usb_free_coherent(udev, usbtouch->data_size, 1534 usbtouch->data, usbtouch->data_dma); 1535 kfree(usbtouch->buffer); 1536 } 1537 1538 static struct usb_endpoint_descriptor * 1539 usbtouch_get_input_endpoint(struct usb_host_interface *interface) 1540 { 1541 int i; 1542 1543 for (i = 0; i < interface->desc.bNumEndpoints; i++) 1544 if (usb_endpoint_dir_in(&interface->endpoint[i].desc)) 1545 return &interface->endpoint[i].desc; 1546 1547 return NULL; 1548 } 1549 1550 static int usbtouch_probe(struct usb_interface *intf, 1551 const struct usb_device_id *id) 1552 { 1553 struct usbtouch_usb *usbtouch; 1554 struct input_dev *input_dev; 1555 struct usb_endpoint_descriptor *endpoint; 1556 struct usb_device *udev = interface_to_usbdev(intf); 1557 struct usbtouch_device_info *type; 1558 int err = -ENOMEM; 1559 1560 /* some devices are ignored */ 1561 if (id->driver_info == DEVTYPE_IGNORE) 1562 return -ENODEV; 1563 1564 endpoint = usbtouch_get_input_endpoint(intf->cur_altsetting); 1565 if (!endpoint) 1566 return -ENXIO; 1567 1568 usbtouch = kzalloc(sizeof(struct usbtouch_usb), GFP_KERNEL); 1569 input_dev = input_allocate_device(); 1570 if (!usbtouch || !input_dev) 1571 goto out_free; 1572 1573 type = &usbtouch_dev_info[id->driver_info]; 1574 usbtouch->type = type; 1575 if (!type->process_pkt) 1576 type->process_pkt = usbtouch_process_pkt; 1577 1578 usbtouch->data_size = type->rept_size; 1579 if (type->get_pkt_len) { 1580 /* 1581 * When dealing with variable-length packets we should 1582 * not request more than wMaxPacketSize bytes at once 1583 * as we do not know if there is more data coming or 1584 * we filled exactly wMaxPacketSize bytes and there is 1585 * nothing else. 1586 */ 1587 usbtouch->data_size = min(usbtouch->data_size, 1588 usb_endpoint_maxp(endpoint)); 1589 } 1590 1591 usbtouch->data = usb_alloc_coherent(udev, usbtouch->data_size, 1592 GFP_KERNEL, &usbtouch->data_dma); 1593 if (!usbtouch->data) 1594 goto out_free; 1595 1596 if (type->get_pkt_len) { 1597 usbtouch->buffer = kmalloc(type->rept_size, GFP_KERNEL); 1598 if (!usbtouch->buffer) 1599 goto out_free_buffers; 1600 } 1601 1602 usbtouch->irq = usb_alloc_urb(0, GFP_KERNEL); 1603 if (!usbtouch->irq) { 1604 dev_dbg(&intf->dev, 1605 "%s - usb_alloc_urb failed: usbtouch->irq\n", __func__); 1606 goto out_free_buffers; 1607 } 1608 1609 usbtouch->interface = intf; 1610 usbtouch->input = input_dev; 1611 1612 if (udev->manufacturer) 1613 strlcpy(usbtouch->name, udev->manufacturer, sizeof(usbtouch->name)); 1614 1615 if (udev->product) { 1616 if (udev->manufacturer) 1617 strlcat(usbtouch->name, " ", sizeof(usbtouch->name)); 1618 strlcat(usbtouch->name, udev->product, sizeof(usbtouch->name)); 1619 } 1620 1621 if (!strlen(usbtouch->name)) 1622 snprintf(usbtouch->name, sizeof(usbtouch->name), 1623 "USB Touchscreen %04x:%04x", 1624 le16_to_cpu(udev->descriptor.idVendor), 1625 le16_to_cpu(udev->descriptor.idProduct)); 1626 1627 usb_make_path(udev, usbtouch->phys, sizeof(usbtouch->phys)); 1628 strlcat(usbtouch->phys, "/input0", sizeof(usbtouch->phys)); 1629 1630 input_dev->name = usbtouch->name; 1631 input_dev->phys = usbtouch->phys; 1632 usb_to_input_id(udev, &input_dev->id); 1633 input_dev->dev.parent = &intf->dev; 1634 1635 input_set_drvdata(input_dev, usbtouch); 1636 1637 input_dev->open = usbtouch_open; 1638 input_dev->close = usbtouch_close; 1639 1640 input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS); 1641 input_dev->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH); 1642 input_set_abs_params(input_dev, ABS_X, type->min_xc, type->max_xc, 0, 0); 1643 input_set_abs_params(input_dev, ABS_Y, type->min_yc, type->max_yc, 0, 0); 1644 if (type->max_press) 1645 input_set_abs_params(input_dev, ABS_PRESSURE, type->min_press, 1646 type->max_press, 0, 0); 1647 1648 if (usb_endpoint_type(endpoint) == USB_ENDPOINT_XFER_INT) 1649 usb_fill_int_urb(usbtouch->irq, udev, 1650 usb_rcvintpipe(udev, endpoint->bEndpointAddress), 1651 usbtouch->data, usbtouch->data_size, 1652 usbtouch_irq, usbtouch, endpoint->bInterval); 1653 else 1654 usb_fill_bulk_urb(usbtouch->irq, udev, 1655 usb_rcvbulkpipe(udev, endpoint->bEndpointAddress), 1656 usbtouch->data, usbtouch->data_size, 1657 usbtouch_irq, usbtouch); 1658 1659 usbtouch->irq->dev = udev; 1660 usbtouch->irq->transfer_dma = usbtouch->data_dma; 1661 usbtouch->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; 1662 1663 /* device specific allocations */ 1664 if (type->alloc) { 1665 err = type->alloc(usbtouch); 1666 if (err) { 1667 dev_dbg(&intf->dev, 1668 "%s - type->alloc() failed, err: %d\n", 1669 __func__, err); 1670 goto out_free_urb; 1671 } 1672 } 1673 1674 /* device specific initialisation*/ 1675 if (type->init) { 1676 err = type->init(usbtouch); 1677 if (err) { 1678 dev_dbg(&intf->dev, 1679 "%s - type->init() failed, err: %d\n", 1680 __func__, err); 1681 goto out_do_exit; 1682 } 1683 } 1684 1685 err = input_register_device(usbtouch->input); 1686 if (err) { 1687 dev_dbg(&intf->dev, 1688 "%s - input_register_device failed, err: %d\n", 1689 __func__, err); 1690 goto out_do_exit; 1691 } 1692 1693 usb_set_intfdata(intf, usbtouch); 1694 1695 if (usbtouch->type->irq_always) { 1696 /* this can't fail */ 1697 usb_autopm_get_interface(intf); 1698 err = usb_submit_urb(usbtouch->irq, GFP_KERNEL); 1699 if (err) { 1700 usb_autopm_put_interface(intf); 1701 dev_err(&intf->dev, 1702 "%s - usb_submit_urb failed with result: %d\n", 1703 __func__, err); 1704 goto out_unregister_input; 1705 } 1706 } 1707 1708 return 0; 1709 1710 out_unregister_input: 1711 input_unregister_device(input_dev); 1712 input_dev = NULL; 1713 out_do_exit: 1714 if (type->exit) 1715 type->exit(usbtouch); 1716 out_free_urb: 1717 usb_free_urb(usbtouch->irq); 1718 out_free_buffers: 1719 usbtouch_free_buffers(udev, usbtouch); 1720 out_free: 1721 input_free_device(input_dev); 1722 kfree(usbtouch); 1723 return err; 1724 } 1725 1726 static void usbtouch_disconnect(struct usb_interface *intf) 1727 { 1728 struct usbtouch_usb *usbtouch = usb_get_intfdata(intf); 1729 1730 if (!usbtouch) 1731 return; 1732 1733 dev_dbg(&intf->dev, 1734 "%s - usbtouch is initialized, cleaning up\n", __func__); 1735 1736 usb_set_intfdata(intf, NULL); 1737 /* this will stop IO via close */ 1738 input_unregister_device(usbtouch->input); 1739 usb_free_urb(usbtouch->irq); 1740 if (usbtouch->type->exit) 1741 usbtouch->type->exit(usbtouch); 1742 usbtouch_free_buffers(interface_to_usbdev(intf), usbtouch); 1743 kfree(usbtouch); 1744 } 1745 1746 MODULE_DEVICE_TABLE(usb, usbtouch_devices); 1747 1748 static struct usb_driver usbtouch_driver = { 1749 .name = "usbtouchscreen", 1750 .probe = usbtouch_probe, 1751 .disconnect = usbtouch_disconnect, 1752 .suspend = usbtouch_suspend, 1753 .resume = usbtouch_resume, 1754 .reset_resume = usbtouch_reset_resume, 1755 .id_table = usbtouch_devices, 1756 .supports_autosuspend = 1, 1757 }; 1758 1759 module_usb_driver(usbtouch_driver); 1760 1761 MODULE_AUTHOR("Daniel Ritz <daniel.ritz@gmx.ch>"); 1762 MODULE_DESCRIPTION("USB Touchscreen Driver"); 1763 MODULE_LICENSE("GPL"); 1764 1765 MODULE_ALIAS("touchkitusb"); 1766 MODULE_ALIAS("itmtouch"); 1767 MODULE_ALIAS("mtouchusb"); 1768