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 #include <linux/mutex.h> 58 59 static bool swap_xy; 60 module_param(swap_xy, bool, 0644); 61 MODULE_PARM_DESC(swap_xy, "If set X and Y axes are swapped."); 62 63 static bool hwcalib_xy; 64 module_param(hwcalib_xy, bool, 0644); 65 MODULE_PARM_DESC(hwcalib_xy, "If set hw-calibrated X/Y are used if available"); 66 67 /* device specifc data/functions */ 68 struct usbtouch_usb; 69 struct usbtouch_device_info { 70 int min_xc, max_xc; 71 int min_yc, max_yc; 72 int min_press, max_press; 73 int rept_size; 74 75 /* 76 * Always service the USB devices irq not just when the input device is 77 * open. This is useful when devices have a watchdog which prevents us 78 * from periodically polling the device. Leave this unset unless your 79 * touchscreen device requires it, as it does consume more of the USB 80 * bandwidth. 81 */ 82 bool irq_always; 83 84 void (*process_pkt) (struct usbtouch_usb *usbtouch, unsigned char *pkt, int len); 85 86 /* 87 * used to get the packet len. possible return values: 88 * > 0: packet len 89 * = 0: skip one byte 90 * < 0: -return value more bytes needed 91 */ 92 int (*get_pkt_len) (unsigned char *pkt, int len); 93 94 int (*read_data) (struct usbtouch_usb *usbtouch, unsigned char *pkt); 95 int (*alloc) (struct usbtouch_usb *usbtouch); 96 int (*init) (struct usbtouch_usb *usbtouch); 97 void (*exit) (struct usbtouch_usb *usbtouch); 98 }; 99 100 /* a usbtouch device */ 101 struct usbtouch_usb { 102 unsigned char *data; 103 dma_addr_t data_dma; 104 int data_size; 105 unsigned char *buffer; 106 int buf_len; 107 struct urb *irq; 108 struct usb_interface *interface; 109 struct input_dev *input; 110 struct usbtouch_device_info *type; 111 struct mutex pm_mutex; /* serialize access to open/suspend */ 112 bool is_open; 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 */ 123 enum { 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_IRTOUCH_HIRES, 134 DEVTYPE_IDEALTEK, 135 DEVTYPE_GENERAL_TOUCH, 136 DEVTYPE_GOTOP, 137 DEVTYPE_JASTEC, 138 DEVTYPE_E2I, 139 DEVTYPE_ZYTRONIC, 140 DEVTYPE_TC45USB, 141 DEVTYPE_NEXIO, 142 DEVTYPE_ELO, 143 DEVTYPE_ETOUCH, 144 }; 145 146 #define USB_DEVICE_HID_CLASS(vend, prod) \ 147 .match_flags = USB_DEVICE_ID_MATCH_INT_CLASS \ 148 | USB_DEVICE_ID_MATCH_DEVICE, \ 149 .idVendor = (vend), \ 150 .idProduct = (prod), \ 151 .bInterfaceClass = USB_INTERFACE_CLASS_HID 152 153 static const struct usb_device_id usbtouch_devices[] = { 154 #ifdef CONFIG_TOUCHSCREEN_USB_EGALAX 155 /* ignore the HID capable devices, handled by usbhid */ 156 {USB_DEVICE_HID_CLASS(0x0eef, 0x0001), .driver_info = DEVTYPE_IGNORE}, 157 {USB_DEVICE_HID_CLASS(0x0eef, 0x0002), .driver_info = DEVTYPE_IGNORE}, 158 159 /* normal device IDs */ 160 {USB_DEVICE(0x3823, 0x0001), .driver_info = DEVTYPE_EGALAX}, 161 {USB_DEVICE(0x3823, 0x0002), .driver_info = DEVTYPE_EGALAX}, 162 {USB_DEVICE(0x0123, 0x0001), .driver_info = DEVTYPE_EGALAX}, 163 {USB_DEVICE(0x0eef, 0x0001), .driver_info = DEVTYPE_EGALAX}, 164 {USB_DEVICE(0x0eef, 0x0002), .driver_info = DEVTYPE_EGALAX}, 165 {USB_DEVICE(0x1234, 0x0001), .driver_info = DEVTYPE_EGALAX}, 166 {USB_DEVICE(0x1234, 0x0002), .driver_info = DEVTYPE_EGALAX}, 167 #endif 168 169 #ifdef CONFIG_TOUCHSCREEN_USB_PANJIT 170 {USB_DEVICE(0x134c, 0x0001), .driver_info = DEVTYPE_PANJIT}, 171 {USB_DEVICE(0x134c, 0x0002), .driver_info = DEVTYPE_PANJIT}, 172 {USB_DEVICE(0x134c, 0x0003), .driver_info = DEVTYPE_PANJIT}, 173 {USB_DEVICE(0x134c, 0x0004), .driver_info = DEVTYPE_PANJIT}, 174 #endif 175 176 #ifdef CONFIG_TOUCHSCREEN_USB_3M 177 {USB_DEVICE(0x0596, 0x0001), .driver_info = DEVTYPE_3M}, 178 #endif 179 180 #ifdef CONFIG_TOUCHSCREEN_USB_ITM 181 {USB_DEVICE(0x0403, 0xf9e9), .driver_info = DEVTYPE_ITM}, 182 {USB_DEVICE(0x16e3, 0xf9e9), .driver_info = DEVTYPE_ITM}, 183 #endif 184 185 #ifdef CONFIG_TOUCHSCREEN_USB_ETURBO 186 {USB_DEVICE(0x1234, 0x5678), .driver_info = DEVTYPE_ETURBO}, 187 #endif 188 189 #ifdef CONFIG_TOUCHSCREEN_USB_GUNZE 190 {USB_DEVICE(0x0637, 0x0001), .driver_info = DEVTYPE_GUNZE}, 191 #endif 192 193 #ifdef CONFIG_TOUCHSCREEN_USB_DMC_TSC10 194 {USB_DEVICE(0x0afa, 0x03e8), .driver_info = DEVTYPE_DMC_TSC10}, 195 #endif 196 197 #ifdef CONFIG_TOUCHSCREEN_USB_IRTOUCH 198 {USB_DEVICE(0x595a, 0x0001), .driver_info = DEVTYPE_IRTOUCH}, 199 {USB_DEVICE(0x6615, 0x0001), .driver_info = DEVTYPE_IRTOUCH}, 200 {USB_DEVICE(0x6615, 0x0012), .driver_info = DEVTYPE_IRTOUCH_HIRES}, 201 #endif 202 203 #ifdef CONFIG_TOUCHSCREEN_USB_IDEALTEK 204 {USB_DEVICE(0x1391, 0x1000), .driver_info = DEVTYPE_IDEALTEK}, 205 #endif 206 207 #ifdef CONFIG_TOUCHSCREEN_USB_GENERAL_TOUCH 208 {USB_DEVICE(0x0dfc, 0x0001), .driver_info = DEVTYPE_GENERAL_TOUCH}, 209 #endif 210 211 #ifdef CONFIG_TOUCHSCREEN_USB_GOTOP 212 {USB_DEVICE(0x08f2, 0x007f), .driver_info = DEVTYPE_GOTOP}, 213 {USB_DEVICE(0x08f2, 0x00ce), .driver_info = DEVTYPE_GOTOP}, 214 {USB_DEVICE(0x08f2, 0x00f4), .driver_info = DEVTYPE_GOTOP}, 215 #endif 216 217 #ifdef CONFIG_TOUCHSCREEN_USB_JASTEC 218 {USB_DEVICE(0x0f92, 0x0001), .driver_info = DEVTYPE_JASTEC}, 219 #endif 220 221 #ifdef CONFIG_TOUCHSCREEN_USB_E2I 222 {USB_DEVICE(0x1ac7, 0x0001), .driver_info = DEVTYPE_E2I}, 223 #endif 224 225 #ifdef CONFIG_TOUCHSCREEN_USB_ZYTRONIC 226 {USB_DEVICE(0x14c8, 0x0003), .driver_info = DEVTYPE_ZYTRONIC}, 227 #endif 228 229 #ifdef CONFIG_TOUCHSCREEN_USB_ETT_TC45USB 230 /* TC5UH */ 231 {USB_DEVICE(0x0664, 0x0309), .driver_info = DEVTYPE_TC45USB}, 232 /* TC4UM */ 233 {USB_DEVICE(0x0664, 0x0306), .driver_info = DEVTYPE_TC45USB}, 234 #endif 235 236 #ifdef CONFIG_TOUCHSCREEN_USB_NEXIO 237 /* data interface only */ 238 {USB_DEVICE_AND_INTERFACE_INFO(0x10f0, 0x2002, 0x0a, 0x00, 0x00), 239 .driver_info = DEVTYPE_NEXIO}, 240 {USB_DEVICE_AND_INTERFACE_INFO(0x1870, 0x0001, 0x0a, 0x00, 0x00), 241 .driver_info = DEVTYPE_NEXIO}, 242 #endif 243 244 #ifdef CONFIG_TOUCHSCREEN_USB_ELO 245 {USB_DEVICE(0x04e7, 0x0020), .driver_info = DEVTYPE_ELO}, 246 #endif 247 248 #ifdef CONFIG_TOUCHSCREEN_USB_EASYTOUCH 249 {USB_DEVICE(0x7374, 0x0001), .driver_info = DEVTYPE_ETOUCH}, 250 #endif 251 252 {} 253 }; 254 255 256 /***************************************************************************** 257 * e2i Part 258 */ 259 260 #ifdef CONFIG_TOUCHSCREEN_USB_E2I 261 static int e2i_init(struct usbtouch_usb *usbtouch) 262 { 263 int ret; 264 struct usb_device *udev = interface_to_usbdev(usbtouch->interface); 265 266 ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0), 267 0x01, 0x02, 0x0000, 0x0081, 268 NULL, 0, USB_CTRL_SET_TIMEOUT); 269 270 dev_dbg(&usbtouch->interface->dev, 271 "%s - usb_control_msg - E2I_RESET - bytes|err: %d\n", 272 __func__, ret); 273 return ret; 274 } 275 276 static int e2i_read_data(struct usbtouch_usb *dev, unsigned char *pkt) 277 { 278 int tmp = (pkt[0] << 8) | pkt[1]; 279 dev->x = (pkt[2] << 8) | pkt[3]; 280 dev->y = (pkt[4] << 8) | pkt[5]; 281 282 tmp = tmp - 0xA000; 283 dev->touch = (tmp > 0); 284 dev->press = (tmp > 0 ? tmp : 0); 285 286 return 1; 287 } 288 #endif 289 290 291 /***************************************************************************** 292 * eGalax part 293 */ 294 295 #ifdef CONFIG_TOUCHSCREEN_USB_EGALAX 296 297 #ifndef MULTI_PACKET 298 #define MULTI_PACKET 299 #endif 300 301 #define EGALAX_PKT_TYPE_MASK 0xFE 302 #define EGALAX_PKT_TYPE_REPT 0x80 303 #define EGALAX_PKT_TYPE_DIAG 0x0A 304 305 static int egalax_init(struct usbtouch_usb *usbtouch) 306 { 307 int ret, i; 308 unsigned char *buf; 309 struct usb_device *udev = interface_to_usbdev(usbtouch->interface); 310 311 /* 312 * An eGalax diagnostic packet kicks the device into using the right 313 * protocol. We send a "check active" packet. The response will be 314 * read later and ignored. 315 */ 316 317 buf = kmalloc(3, GFP_KERNEL); 318 if (!buf) 319 return -ENOMEM; 320 321 buf[0] = EGALAX_PKT_TYPE_DIAG; 322 buf[1] = 1; /* length */ 323 buf[2] = 'A'; /* command - check active */ 324 325 for (i = 0; i < 3; i++) { 326 ret = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 327 0, 328 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE, 329 0, 0, buf, 3, 330 USB_CTRL_SET_TIMEOUT); 331 if (ret >= 0) { 332 ret = 0; 333 break; 334 } 335 if (ret != -EPIPE) 336 break; 337 } 338 339 kfree(buf); 340 341 return ret; 342 } 343 344 static int egalax_read_data(struct usbtouch_usb *dev, unsigned char *pkt) 345 { 346 if ((pkt[0] & EGALAX_PKT_TYPE_MASK) != EGALAX_PKT_TYPE_REPT) 347 return 0; 348 349 dev->x = ((pkt[3] & 0x0F) << 7) | (pkt[4] & 0x7F); 350 dev->y = ((pkt[1] & 0x0F) << 7) | (pkt[2] & 0x7F); 351 dev->touch = pkt[0] & 0x01; 352 353 return 1; 354 } 355 356 static int egalax_get_pkt_len(unsigned char *buf, int len) 357 { 358 switch (buf[0] & EGALAX_PKT_TYPE_MASK) { 359 case EGALAX_PKT_TYPE_REPT: 360 return 5; 361 362 case EGALAX_PKT_TYPE_DIAG: 363 if (len < 2) 364 return -1; 365 366 return buf[1] + 2; 367 } 368 369 return 0; 370 } 371 #endif 372 373 /***************************************************************************** 374 * EasyTouch part 375 */ 376 377 #ifdef CONFIG_TOUCHSCREEN_USB_EASYTOUCH 378 379 #ifndef MULTI_PACKET 380 #define MULTI_PACKET 381 #endif 382 383 #define ETOUCH_PKT_TYPE_MASK 0xFE 384 #define ETOUCH_PKT_TYPE_REPT 0x80 385 #define ETOUCH_PKT_TYPE_REPT2 0xB0 386 #define ETOUCH_PKT_TYPE_DIAG 0x0A 387 388 static int etouch_read_data(struct usbtouch_usb *dev, unsigned char *pkt) 389 { 390 if ((pkt[0] & ETOUCH_PKT_TYPE_MASK) != ETOUCH_PKT_TYPE_REPT && 391 (pkt[0] & ETOUCH_PKT_TYPE_MASK) != ETOUCH_PKT_TYPE_REPT2) 392 return 0; 393 394 dev->x = ((pkt[1] & 0x1F) << 7) | (pkt[2] & 0x7F); 395 dev->y = ((pkt[3] & 0x1F) << 7) | (pkt[4] & 0x7F); 396 dev->touch = pkt[0] & 0x01; 397 398 return 1; 399 } 400 401 static int etouch_get_pkt_len(unsigned char *buf, int len) 402 { 403 switch (buf[0] & ETOUCH_PKT_TYPE_MASK) { 404 case ETOUCH_PKT_TYPE_REPT: 405 case ETOUCH_PKT_TYPE_REPT2: 406 return 5; 407 408 case ETOUCH_PKT_TYPE_DIAG: 409 if (len < 2) 410 return -1; 411 412 return buf[1] + 2; 413 } 414 415 return 0; 416 } 417 #endif 418 419 /***************************************************************************** 420 * PanJit Part 421 */ 422 #ifdef CONFIG_TOUCHSCREEN_USB_PANJIT 423 static int panjit_read_data(struct usbtouch_usb *dev, unsigned char *pkt) 424 { 425 dev->x = ((pkt[2] & 0x0F) << 8) | pkt[1]; 426 dev->y = ((pkt[4] & 0x0F) << 8) | pkt[3]; 427 dev->touch = pkt[0] & 0x01; 428 429 return 1; 430 } 431 #endif 432 433 434 /***************************************************************************** 435 * 3M/Microtouch Part 436 */ 437 #ifdef CONFIG_TOUCHSCREEN_USB_3M 438 439 #define MTOUCHUSB_ASYNC_REPORT 1 440 #define MTOUCHUSB_RESET 7 441 #define MTOUCHUSB_REQ_CTRLLR_ID 10 442 443 static int mtouch_read_data(struct usbtouch_usb *dev, unsigned char *pkt) 444 { 445 if (hwcalib_xy) { 446 dev->x = (pkt[4] << 8) | pkt[3]; 447 dev->y = 0xffff - ((pkt[6] << 8) | pkt[5]); 448 } else { 449 dev->x = (pkt[8] << 8) | pkt[7]; 450 dev->y = (pkt[10] << 8) | pkt[9]; 451 } 452 dev->touch = (pkt[2] & 0x40) ? 1 : 0; 453 454 return 1; 455 } 456 457 static int mtouch_init(struct usbtouch_usb *usbtouch) 458 { 459 int ret, i; 460 struct usb_device *udev = interface_to_usbdev(usbtouch->interface); 461 462 ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0), 463 MTOUCHUSB_RESET, 464 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE, 465 1, 0, NULL, 0, USB_CTRL_SET_TIMEOUT); 466 dev_dbg(&usbtouch->interface->dev, 467 "%s - usb_control_msg - MTOUCHUSB_RESET - bytes|err: %d\n", 468 __func__, ret); 469 if (ret < 0) 470 return ret; 471 msleep(150); 472 473 for (i = 0; i < 3; i++) { 474 ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0), 475 MTOUCHUSB_ASYNC_REPORT, 476 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE, 477 1, 1, NULL, 0, USB_CTRL_SET_TIMEOUT); 478 dev_dbg(&usbtouch->interface->dev, 479 "%s - usb_control_msg - MTOUCHUSB_ASYNC_REPORT - bytes|err: %d\n", 480 __func__, ret); 481 if (ret >= 0) 482 break; 483 if (ret != -EPIPE) 484 return ret; 485 } 486 487 /* Default min/max xy are the raw values, override if using hw-calib */ 488 if (hwcalib_xy) { 489 input_set_abs_params(usbtouch->input, ABS_X, 0, 0xffff, 0, 0); 490 input_set_abs_params(usbtouch->input, ABS_Y, 0, 0xffff, 0, 0); 491 } 492 493 return 0; 494 } 495 #endif 496 497 498 /***************************************************************************** 499 * ITM Part 500 */ 501 #ifdef CONFIG_TOUCHSCREEN_USB_ITM 502 static int itm_read_data(struct usbtouch_usb *dev, unsigned char *pkt) 503 { 504 int touch; 505 /* 506 * ITM devices report invalid x/y data if not touched. 507 * if the screen was touched before but is not touched any more 508 * report touch as 0 with the last valid x/y data once. then stop 509 * reporting data until touched again. 510 */ 511 dev->press = ((pkt[2] & 0x01) << 7) | (pkt[5] & 0x7F); 512 513 touch = ~pkt[7] & 0x20; 514 if (!touch) { 515 if (dev->touch) { 516 dev->touch = 0; 517 return 1; 518 } 519 520 return 0; 521 } 522 523 dev->x = ((pkt[0] & 0x1F) << 7) | (pkt[3] & 0x7F); 524 dev->y = ((pkt[1] & 0x1F) << 7) | (pkt[4] & 0x7F); 525 dev->touch = touch; 526 527 return 1; 528 } 529 #endif 530 531 532 /***************************************************************************** 533 * eTurboTouch part 534 */ 535 #ifdef CONFIG_TOUCHSCREEN_USB_ETURBO 536 #ifndef MULTI_PACKET 537 #define MULTI_PACKET 538 #endif 539 static int eturbo_read_data(struct usbtouch_usb *dev, unsigned char *pkt) 540 { 541 unsigned int shift; 542 543 /* packets should start with sync */ 544 if (!(pkt[0] & 0x80)) 545 return 0; 546 547 shift = (6 - (pkt[0] & 0x03)); 548 dev->x = ((pkt[3] << 7) | pkt[4]) >> shift; 549 dev->y = ((pkt[1] << 7) | pkt[2]) >> shift; 550 dev->touch = (pkt[0] & 0x10) ? 1 : 0; 551 552 return 1; 553 } 554 555 static int eturbo_get_pkt_len(unsigned char *buf, int len) 556 { 557 if (buf[0] & 0x80) 558 return 5; 559 if (buf[0] == 0x01) 560 return 3; 561 return 0; 562 } 563 #endif 564 565 566 /***************************************************************************** 567 * Gunze part 568 */ 569 #ifdef CONFIG_TOUCHSCREEN_USB_GUNZE 570 static int gunze_read_data(struct usbtouch_usb *dev, unsigned char *pkt) 571 { 572 if (!(pkt[0] & 0x80) || ((pkt[1] | pkt[2] | pkt[3]) & 0x80)) 573 return 0; 574 575 dev->x = ((pkt[0] & 0x1F) << 7) | (pkt[2] & 0x7F); 576 dev->y = ((pkt[1] & 0x1F) << 7) | (pkt[3] & 0x7F); 577 dev->touch = pkt[0] & 0x20; 578 579 return 1; 580 } 581 #endif 582 583 /***************************************************************************** 584 * DMC TSC-10/25 Part 585 * 586 * Documentation about the controller and it's protocol can be found at 587 * http://www.dmccoltd.com/files/controler/tsc10usb_pi_e.pdf 588 * http://www.dmccoltd.com/files/controler/tsc25_usb_e.pdf 589 */ 590 #ifdef CONFIG_TOUCHSCREEN_USB_DMC_TSC10 591 592 /* supported data rates. currently using 130 */ 593 #define TSC10_RATE_POINT 0x50 594 #define TSC10_RATE_30 0x40 595 #define TSC10_RATE_50 0x41 596 #define TSC10_RATE_80 0x42 597 #define TSC10_RATE_100 0x43 598 #define TSC10_RATE_130 0x44 599 #define TSC10_RATE_150 0x45 600 601 /* commands */ 602 #define TSC10_CMD_RESET 0x55 603 #define TSC10_CMD_RATE 0x05 604 #define TSC10_CMD_DATA1 0x01 605 606 static int dmc_tsc10_init(struct usbtouch_usb *usbtouch) 607 { 608 struct usb_device *dev = interface_to_usbdev(usbtouch->interface); 609 int ret = -ENOMEM; 610 unsigned char *buf; 611 612 buf = kmalloc(2, GFP_NOIO); 613 if (!buf) 614 goto err_nobuf; 615 /* reset */ 616 buf[0] = buf[1] = 0xFF; 617 ret = usb_control_msg(dev, usb_rcvctrlpipe (dev, 0), 618 TSC10_CMD_RESET, 619 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE, 620 0, 0, buf, 2, USB_CTRL_SET_TIMEOUT); 621 if (ret < 0) 622 goto err_out; 623 if (buf[0] != 0x06) { 624 ret = -ENODEV; 625 goto err_out; 626 } 627 628 /* TSC-25 data sheet specifies a delay after the RESET command */ 629 msleep(150); 630 631 /* set coordinate output rate */ 632 buf[0] = buf[1] = 0xFF; 633 ret = usb_control_msg(dev, usb_rcvctrlpipe (dev, 0), 634 TSC10_CMD_RATE, 635 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE, 636 TSC10_RATE_150, 0, buf, 2, USB_CTRL_SET_TIMEOUT); 637 if (ret < 0) 638 goto err_out; 639 if ((buf[0] != 0x06) && (buf[0] != 0x15 || buf[1] != 0x01)) { 640 ret = -ENODEV; 641 goto err_out; 642 } 643 644 /* start sending data */ 645 ret = usb_control_msg(dev, usb_rcvctrlpipe (dev, 0), 646 TSC10_CMD_DATA1, 647 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE, 648 0, 0, NULL, 0, USB_CTRL_SET_TIMEOUT); 649 err_out: 650 kfree(buf); 651 err_nobuf: 652 return ret; 653 } 654 655 656 static int dmc_tsc10_read_data(struct usbtouch_usb *dev, unsigned char *pkt) 657 { 658 dev->x = ((pkt[2] & 0x03) << 8) | pkt[1]; 659 dev->y = ((pkt[4] & 0x03) << 8) | pkt[3]; 660 dev->touch = pkt[0] & 0x01; 661 662 return 1; 663 } 664 #endif 665 666 667 /***************************************************************************** 668 * IRTOUCH Part 669 */ 670 #ifdef CONFIG_TOUCHSCREEN_USB_IRTOUCH 671 static int irtouch_read_data(struct usbtouch_usb *dev, unsigned char *pkt) 672 { 673 dev->x = (pkt[3] << 8) | pkt[2]; 674 dev->y = (pkt[5] << 8) | pkt[4]; 675 dev->touch = (pkt[1] & 0x03) ? 1 : 0; 676 677 return 1; 678 } 679 #endif 680 681 /***************************************************************************** 682 * ET&T TC5UH/TC4UM part 683 */ 684 #ifdef CONFIG_TOUCHSCREEN_USB_ETT_TC45USB 685 static int tc45usb_read_data(struct usbtouch_usb *dev, unsigned char *pkt) 686 { 687 dev->x = ((pkt[2] & 0x0F) << 8) | pkt[1]; 688 dev->y = ((pkt[4] & 0x0F) << 8) | pkt[3]; 689 dev->touch = pkt[0] & 0x01; 690 691 return 1; 692 } 693 #endif 694 695 /***************************************************************************** 696 * IdealTEK URTC1000 Part 697 */ 698 #ifdef CONFIG_TOUCHSCREEN_USB_IDEALTEK 699 #ifndef MULTI_PACKET 700 #define MULTI_PACKET 701 #endif 702 static int idealtek_get_pkt_len(unsigned char *buf, int len) 703 { 704 if (buf[0] & 0x80) 705 return 5; 706 if (buf[0] == 0x01) 707 return len; 708 return 0; 709 } 710 711 static int idealtek_read_data(struct usbtouch_usb *dev, unsigned char *pkt) 712 { 713 switch (pkt[0] & 0x98) { 714 case 0x88: 715 /* touch data in IdealTEK mode */ 716 dev->x = (pkt[1] << 5) | (pkt[2] >> 2); 717 dev->y = (pkt[3] << 5) | (pkt[4] >> 2); 718 dev->touch = (pkt[0] & 0x40) ? 1 : 0; 719 return 1; 720 721 case 0x98: 722 /* touch data in MT emulation mode */ 723 dev->x = (pkt[2] << 5) | (pkt[1] >> 2); 724 dev->y = (pkt[4] << 5) | (pkt[3] >> 2); 725 dev->touch = (pkt[0] & 0x40) ? 1 : 0; 726 return 1; 727 728 default: 729 return 0; 730 } 731 } 732 #endif 733 734 /***************************************************************************** 735 * General Touch Part 736 */ 737 #ifdef CONFIG_TOUCHSCREEN_USB_GENERAL_TOUCH 738 static int general_touch_read_data(struct usbtouch_usb *dev, unsigned char *pkt) 739 { 740 dev->x = (pkt[2] << 8) | pkt[1]; 741 dev->y = (pkt[4] << 8) | pkt[3]; 742 dev->press = pkt[5] & 0xff; 743 dev->touch = pkt[0] & 0x01; 744 745 return 1; 746 } 747 #endif 748 749 /***************************************************************************** 750 * GoTop Part 751 */ 752 #ifdef CONFIG_TOUCHSCREEN_USB_GOTOP 753 static int gotop_read_data(struct usbtouch_usb *dev, unsigned char *pkt) 754 { 755 dev->x = ((pkt[1] & 0x38) << 4) | pkt[2]; 756 dev->y = ((pkt[1] & 0x07) << 7) | pkt[3]; 757 dev->touch = pkt[0] & 0x01; 758 759 return 1; 760 } 761 #endif 762 763 /***************************************************************************** 764 * JASTEC Part 765 */ 766 #ifdef CONFIG_TOUCHSCREEN_USB_JASTEC 767 static int jastec_read_data(struct usbtouch_usb *dev, unsigned char *pkt) 768 { 769 dev->x = ((pkt[0] & 0x3f) << 6) | (pkt[2] & 0x3f); 770 dev->y = ((pkt[1] & 0x3f) << 6) | (pkt[3] & 0x3f); 771 dev->touch = (pkt[0] & 0x40) >> 6; 772 773 return 1; 774 } 775 #endif 776 777 /***************************************************************************** 778 * Zytronic Part 779 */ 780 #ifdef CONFIG_TOUCHSCREEN_USB_ZYTRONIC 781 static int zytronic_read_data(struct usbtouch_usb *dev, unsigned char *pkt) 782 { 783 struct usb_interface *intf = dev->interface; 784 785 switch (pkt[0]) { 786 case 0x3A: /* command response */ 787 dev_dbg(&intf->dev, "%s: Command response %d\n", __func__, pkt[1]); 788 break; 789 790 case 0xC0: /* down */ 791 dev->x = (pkt[1] & 0x7f) | ((pkt[2] & 0x07) << 7); 792 dev->y = (pkt[3] & 0x7f) | ((pkt[4] & 0x07) << 7); 793 dev->touch = 1; 794 dev_dbg(&intf->dev, "%s: down %d,%d\n", __func__, dev->x, dev->y); 795 return 1; 796 797 case 0x80: /* up */ 798 dev->x = (pkt[1] & 0x7f) | ((pkt[2] & 0x07) << 7); 799 dev->y = (pkt[3] & 0x7f) | ((pkt[4] & 0x07) << 7); 800 dev->touch = 0; 801 dev_dbg(&intf->dev, "%s: up %d,%d\n", __func__, dev->x, dev->y); 802 return 1; 803 804 default: 805 dev_dbg(&intf->dev, "%s: Unknown return %d\n", __func__, pkt[0]); 806 break; 807 } 808 809 return 0; 810 } 811 #endif 812 813 /***************************************************************************** 814 * NEXIO Part 815 */ 816 #ifdef CONFIG_TOUCHSCREEN_USB_NEXIO 817 818 #define NEXIO_TIMEOUT 5000 819 #define NEXIO_BUFSIZE 1024 820 #define NEXIO_THRESHOLD 50 821 822 struct nexio_priv { 823 struct urb *ack; 824 unsigned char *ack_buf; 825 }; 826 827 struct nexio_touch_packet { 828 u8 flags; /* 0xe1 = touch, 0xe1 = release */ 829 __be16 data_len; /* total bytes of touch data */ 830 __be16 x_len; /* bytes for X axis */ 831 __be16 y_len; /* bytes for Y axis */ 832 u8 data[]; 833 } __attribute__ ((packed)); 834 835 static unsigned char nexio_ack_pkt[2] = { 0xaa, 0x02 }; 836 static unsigned char nexio_init_pkt[4] = { 0x82, 0x04, 0x0a, 0x0f }; 837 838 static void nexio_ack_complete(struct urb *urb) 839 { 840 } 841 842 static int nexio_alloc(struct usbtouch_usb *usbtouch) 843 { 844 struct nexio_priv *priv; 845 int ret = -ENOMEM; 846 847 usbtouch->priv = kmalloc(sizeof(struct nexio_priv), GFP_KERNEL); 848 if (!usbtouch->priv) 849 goto out_buf; 850 851 priv = usbtouch->priv; 852 853 priv->ack_buf = kmemdup(nexio_ack_pkt, sizeof(nexio_ack_pkt), 854 GFP_KERNEL); 855 if (!priv->ack_buf) 856 goto err_priv; 857 858 priv->ack = usb_alloc_urb(0, GFP_KERNEL); 859 if (!priv->ack) { 860 dev_dbg(&usbtouch->interface->dev, 861 "%s - usb_alloc_urb failed: usbtouch->ack\n", __func__); 862 goto err_ack_buf; 863 } 864 865 return 0; 866 867 err_ack_buf: 868 kfree(priv->ack_buf); 869 err_priv: 870 kfree(priv); 871 out_buf: 872 return ret; 873 } 874 875 static int nexio_init(struct usbtouch_usb *usbtouch) 876 { 877 struct usb_device *dev = interface_to_usbdev(usbtouch->interface); 878 struct usb_host_interface *interface = usbtouch->interface->cur_altsetting; 879 struct nexio_priv *priv = usbtouch->priv; 880 int ret = -ENOMEM; 881 int actual_len, i; 882 unsigned char *buf; 883 char *firmware_ver = NULL, *device_name = NULL; 884 int input_ep = 0, output_ep = 0; 885 886 /* find first input and output endpoint */ 887 for (i = 0; i < interface->desc.bNumEndpoints; i++) { 888 if (!input_ep && 889 usb_endpoint_dir_in(&interface->endpoint[i].desc)) 890 input_ep = interface->endpoint[i].desc.bEndpointAddress; 891 if (!output_ep && 892 usb_endpoint_dir_out(&interface->endpoint[i].desc)) 893 output_ep = interface->endpoint[i].desc.bEndpointAddress; 894 } 895 if (!input_ep || !output_ep) 896 return -ENXIO; 897 898 buf = kmalloc(NEXIO_BUFSIZE, GFP_NOIO); 899 if (!buf) 900 goto out_buf; 901 902 /* two empty reads */ 903 for (i = 0; i < 2; i++) { 904 ret = usb_bulk_msg(dev, usb_rcvbulkpipe(dev, input_ep), 905 buf, NEXIO_BUFSIZE, &actual_len, 906 NEXIO_TIMEOUT); 907 if (ret < 0) 908 goto out_buf; 909 } 910 911 /* send init command */ 912 memcpy(buf, nexio_init_pkt, sizeof(nexio_init_pkt)); 913 ret = usb_bulk_msg(dev, usb_sndbulkpipe(dev, output_ep), 914 buf, sizeof(nexio_init_pkt), &actual_len, 915 NEXIO_TIMEOUT); 916 if (ret < 0) 917 goto out_buf; 918 919 /* read replies */ 920 for (i = 0; i < 3; i++) { 921 memset(buf, 0, NEXIO_BUFSIZE); 922 ret = usb_bulk_msg(dev, usb_rcvbulkpipe(dev, input_ep), 923 buf, NEXIO_BUFSIZE, &actual_len, 924 NEXIO_TIMEOUT); 925 if (ret < 0 || actual_len < 1 || buf[1] != actual_len) 926 continue; 927 switch (buf[0]) { 928 case 0x83: /* firmware version */ 929 if (!firmware_ver) 930 firmware_ver = kstrdup(&buf[2], GFP_NOIO); 931 break; 932 case 0x84: /* device name */ 933 if (!device_name) 934 device_name = kstrdup(&buf[2], GFP_NOIO); 935 break; 936 } 937 } 938 939 printk(KERN_INFO "Nexio device: %s, firmware version: %s\n", 940 device_name, firmware_ver); 941 942 kfree(firmware_ver); 943 kfree(device_name); 944 945 usb_fill_bulk_urb(priv->ack, dev, usb_sndbulkpipe(dev, output_ep), 946 priv->ack_buf, sizeof(nexio_ack_pkt), 947 nexio_ack_complete, usbtouch); 948 ret = 0; 949 950 out_buf: 951 kfree(buf); 952 return ret; 953 } 954 955 static void nexio_exit(struct usbtouch_usb *usbtouch) 956 { 957 struct nexio_priv *priv = usbtouch->priv; 958 959 usb_kill_urb(priv->ack); 960 usb_free_urb(priv->ack); 961 kfree(priv->ack_buf); 962 kfree(priv); 963 } 964 965 static int nexio_read_data(struct usbtouch_usb *usbtouch, unsigned char *pkt) 966 { 967 struct nexio_touch_packet *packet = (void *) pkt; 968 struct nexio_priv *priv = usbtouch->priv; 969 unsigned int data_len = be16_to_cpu(packet->data_len); 970 unsigned int x_len = be16_to_cpu(packet->x_len); 971 unsigned int y_len = be16_to_cpu(packet->y_len); 972 int x, y, begin_x, begin_y, end_x, end_y, w, h, ret; 973 974 /* got touch data? */ 975 if ((pkt[0] & 0xe0) != 0xe0) 976 return 0; 977 978 if (data_len > 0xff) 979 data_len -= 0x100; 980 if (x_len > 0xff) 981 x_len -= 0x80; 982 983 /* send ACK */ 984 ret = usb_submit_urb(priv->ack, GFP_ATOMIC); 985 986 if (!usbtouch->type->max_xc) { 987 usbtouch->type->max_xc = 2 * x_len; 988 input_set_abs_params(usbtouch->input, ABS_X, 989 0, usbtouch->type->max_xc, 0, 0); 990 usbtouch->type->max_yc = 2 * y_len; 991 input_set_abs_params(usbtouch->input, ABS_Y, 992 0, usbtouch->type->max_yc, 0, 0); 993 } 994 /* 995 * The device reports state of IR sensors on X and Y axes. 996 * Each byte represents "darkness" percentage (0-100) of one element. 997 * 17" touchscreen reports only 64 x 52 bytes so the resolution is low. 998 * This also means that there's a limited multi-touch capability but 999 * it's disabled (and untested) here as there's no X driver for that. 1000 */ 1001 begin_x = end_x = begin_y = end_y = -1; 1002 for (x = 0; x < x_len; x++) { 1003 if (begin_x == -1 && packet->data[x] > NEXIO_THRESHOLD) { 1004 begin_x = x; 1005 continue; 1006 } 1007 if (end_x == -1 && begin_x != -1 && packet->data[x] < NEXIO_THRESHOLD) { 1008 end_x = x - 1; 1009 for (y = x_len; y < data_len; y++) { 1010 if (begin_y == -1 && packet->data[y] > NEXIO_THRESHOLD) { 1011 begin_y = y - x_len; 1012 continue; 1013 } 1014 if (end_y == -1 && 1015 begin_y != -1 && packet->data[y] < NEXIO_THRESHOLD) { 1016 end_y = y - 1 - x_len; 1017 w = end_x - begin_x; 1018 h = end_y - begin_y; 1019 #if 0 1020 /* multi-touch */ 1021 input_report_abs(usbtouch->input, 1022 ABS_MT_TOUCH_MAJOR, max(w,h)); 1023 input_report_abs(usbtouch->input, 1024 ABS_MT_TOUCH_MINOR, min(x,h)); 1025 input_report_abs(usbtouch->input, 1026 ABS_MT_POSITION_X, 2*begin_x+w); 1027 input_report_abs(usbtouch->input, 1028 ABS_MT_POSITION_Y, 2*begin_y+h); 1029 input_report_abs(usbtouch->input, 1030 ABS_MT_ORIENTATION, w > h); 1031 input_mt_sync(usbtouch->input); 1032 #endif 1033 /* single touch */ 1034 usbtouch->x = 2 * begin_x + w; 1035 usbtouch->y = 2 * begin_y + h; 1036 usbtouch->touch = packet->flags & 0x01; 1037 begin_y = end_y = -1; 1038 return 1; 1039 } 1040 } 1041 begin_x = end_x = -1; 1042 } 1043 1044 } 1045 return 0; 1046 } 1047 #endif 1048 1049 1050 /***************************************************************************** 1051 * ELO part 1052 */ 1053 1054 #ifdef CONFIG_TOUCHSCREEN_USB_ELO 1055 1056 static int elo_read_data(struct usbtouch_usb *dev, unsigned char *pkt) 1057 { 1058 dev->x = (pkt[3] << 8) | pkt[2]; 1059 dev->y = (pkt[5] << 8) | pkt[4]; 1060 dev->touch = pkt[6] > 0; 1061 dev->press = pkt[6]; 1062 1063 return 1; 1064 } 1065 #endif 1066 1067 1068 /***************************************************************************** 1069 * the different device descriptors 1070 */ 1071 #ifdef MULTI_PACKET 1072 static void usbtouch_process_multi(struct usbtouch_usb *usbtouch, 1073 unsigned char *pkt, int len); 1074 #endif 1075 1076 static struct usbtouch_device_info usbtouch_dev_info[] = { 1077 #ifdef CONFIG_TOUCHSCREEN_USB_ELO 1078 [DEVTYPE_ELO] = { 1079 .min_xc = 0x0, 1080 .max_xc = 0x0fff, 1081 .min_yc = 0x0, 1082 .max_yc = 0x0fff, 1083 .max_press = 0xff, 1084 .rept_size = 8, 1085 .read_data = elo_read_data, 1086 }, 1087 #endif 1088 1089 #ifdef CONFIG_TOUCHSCREEN_USB_EGALAX 1090 [DEVTYPE_EGALAX] = { 1091 .min_xc = 0x0, 1092 .max_xc = 0x07ff, 1093 .min_yc = 0x0, 1094 .max_yc = 0x07ff, 1095 .rept_size = 16, 1096 .process_pkt = usbtouch_process_multi, 1097 .get_pkt_len = egalax_get_pkt_len, 1098 .read_data = egalax_read_data, 1099 .init = egalax_init, 1100 }, 1101 #endif 1102 1103 #ifdef CONFIG_TOUCHSCREEN_USB_PANJIT 1104 [DEVTYPE_PANJIT] = { 1105 .min_xc = 0x0, 1106 .max_xc = 0x0fff, 1107 .min_yc = 0x0, 1108 .max_yc = 0x0fff, 1109 .rept_size = 8, 1110 .read_data = panjit_read_data, 1111 }, 1112 #endif 1113 1114 #ifdef CONFIG_TOUCHSCREEN_USB_3M 1115 [DEVTYPE_3M] = { 1116 .min_xc = 0x0, 1117 .max_xc = 0x4000, 1118 .min_yc = 0x0, 1119 .max_yc = 0x4000, 1120 .rept_size = 11, 1121 .read_data = mtouch_read_data, 1122 .init = mtouch_init, 1123 }, 1124 #endif 1125 1126 #ifdef CONFIG_TOUCHSCREEN_USB_ITM 1127 [DEVTYPE_ITM] = { 1128 .min_xc = 0x0, 1129 .max_xc = 0x0fff, 1130 .min_yc = 0x0, 1131 .max_yc = 0x0fff, 1132 .max_press = 0xff, 1133 .rept_size = 8, 1134 .read_data = itm_read_data, 1135 }, 1136 #endif 1137 1138 #ifdef CONFIG_TOUCHSCREEN_USB_ETURBO 1139 [DEVTYPE_ETURBO] = { 1140 .min_xc = 0x0, 1141 .max_xc = 0x07ff, 1142 .min_yc = 0x0, 1143 .max_yc = 0x07ff, 1144 .rept_size = 8, 1145 .process_pkt = usbtouch_process_multi, 1146 .get_pkt_len = eturbo_get_pkt_len, 1147 .read_data = eturbo_read_data, 1148 }, 1149 #endif 1150 1151 #ifdef CONFIG_TOUCHSCREEN_USB_GUNZE 1152 [DEVTYPE_GUNZE] = { 1153 .min_xc = 0x0, 1154 .max_xc = 0x0fff, 1155 .min_yc = 0x0, 1156 .max_yc = 0x0fff, 1157 .rept_size = 4, 1158 .read_data = gunze_read_data, 1159 }, 1160 #endif 1161 1162 #ifdef CONFIG_TOUCHSCREEN_USB_DMC_TSC10 1163 [DEVTYPE_DMC_TSC10] = { 1164 .min_xc = 0x0, 1165 .max_xc = 0x03ff, 1166 .min_yc = 0x0, 1167 .max_yc = 0x03ff, 1168 .rept_size = 5, 1169 .init = dmc_tsc10_init, 1170 .read_data = dmc_tsc10_read_data, 1171 }, 1172 #endif 1173 1174 #ifdef CONFIG_TOUCHSCREEN_USB_IRTOUCH 1175 [DEVTYPE_IRTOUCH] = { 1176 .min_xc = 0x0, 1177 .max_xc = 0x0fff, 1178 .min_yc = 0x0, 1179 .max_yc = 0x0fff, 1180 .rept_size = 8, 1181 .read_data = irtouch_read_data, 1182 }, 1183 1184 [DEVTYPE_IRTOUCH_HIRES] = { 1185 .min_xc = 0x0, 1186 .max_xc = 0x7fff, 1187 .min_yc = 0x0, 1188 .max_yc = 0x7fff, 1189 .rept_size = 8, 1190 .read_data = irtouch_read_data, 1191 }, 1192 #endif 1193 1194 #ifdef CONFIG_TOUCHSCREEN_USB_IDEALTEK 1195 [DEVTYPE_IDEALTEK] = { 1196 .min_xc = 0x0, 1197 .max_xc = 0x0fff, 1198 .min_yc = 0x0, 1199 .max_yc = 0x0fff, 1200 .rept_size = 8, 1201 .process_pkt = usbtouch_process_multi, 1202 .get_pkt_len = idealtek_get_pkt_len, 1203 .read_data = idealtek_read_data, 1204 }, 1205 #endif 1206 1207 #ifdef CONFIG_TOUCHSCREEN_USB_GENERAL_TOUCH 1208 [DEVTYPE_GENERAL_TOUCH] = { 1209 .min_xc = 0x0, 1210 .max_xc = 0x7fff, 1211 .min_yc = 0x0, 1212 .max_yc = 0x7fff, 1213 .rept_size = 7, 1214 .read_data = general_touch_read_data, 1215 }, 1216 #endif 1217 1218 #ifdef CONFIG_TOUCHSCREEN_USB_GOTOP 1219 [DEVTYPE_GOTOP] = { 1220 .min_xc = 0x0, 1221 .max_xc = 0x03ff, 1222 .min_yc = 0x0, 1223 .max_yc = 0x03ff, 1224 .rept_size = 4, 1225 .read_data = gotop_read_data, 1226 }, 1227 #endif 1228 1229 #ifdef CONFIG_TOUCHSCREEN_USB_JASTEC 1230 [DEVTYPE_JASTEC] = { 1231 .min_xc = 0x0, 1232 .max_xc = 0x0fff, 1233 .min_yc = 0x0, 1234 .max_yc = 0x0fff, 1235 .rept_size = 4, 1236 .read_data = jastec_read_data, 1237 }, 1238 #endif 1239 1240 #ifdef CONFIG_TOUCHSCREEN_USB_E2I 1241 [DEVTYPE_E2I] = { 1242 .min_xc = 0x0, 1243 .max_xc = 0x7fff, 1244 .min_yc = 0x0, 1245 .max_yc = 0x7fff, 1246 .rept_size = 6, 1247 .init = e2i_init, 1248 .read_data = e2i_read_data, 1249 }, 1250 #endif 1251 1252 #ifdef CONFIG_TOUCHSCREEN_USB_ZYTRONIC 1253 [DEVTYPE_ZYTRONIC] = { 1254 .min_xc = 0x0, 1255 .max_xc = 0x03ff, 1256 .min_yc = 0x0, 1257 .max_yc = 0x03ff, 1258 .rept_size = 5, 1259 .read_data = zytronic_read_data, 1260 .irq_always = true, 1261 }, 1262 #endif 1263 1264 #ifdef CONFIG_TOUCHSCREEN_USB_ETT_TC45USB 1265 [DEVTYPE_TC45USB] = { 1266 .min_xc = 0x0, 1267 .max_xc = 0x0fff, 1268 .min_yc = 0x0, 1269 .max_yc = 0x0fff, 1270 .rept_size = 5, 1271 .read_data = tc45usb_read_data, 1272 }, 1273 #endif 1274 1275 #ifdef CONFIG_TOUCHSCREEN_USB_NEXIO 1276 [DEVTYPE_NEXIO] = { 1277 .rept_size = 1024, 1278 .irq_always = true, 1279 .read_data = nexio_read_data, 1280 .alloc = nexio_alloc, 1281 .init = nexio_init, 1282 .exit = nexio_exit, 1283 }, 1284 #endif 1285 #ifdef CONFIG_TOUCHSCREEN_USB_EASYTOUCH 1286 [DEVTYPE_ETOUCH] = { 1287 .min_xc = 0x0, 1288 .max_xc = 0x07ff, 1289 .min_yc = 0x0, 1290 .max_yc = 0x07ff, 1291 .rept_size = 16, 1292 .process_pkt = usbtouch_process_multi, 1293 .get_pkt_len = etouch_get_pkt_len, 1294 .read_data = etouch_read_data, 1295 }, 1296 #endif 1297 }; 1298 1299 1300 /***************************************************************************** 1301 * Generic Part 1302 */ 1303 static void usbtouch_process_pkt(struct usbtouch_usb *usbtouch, 1304 unsigned char *pkt, int len) 1305 { 1306 struct usbtouch_device_info *type = usbtouch->type; 1307 1308 if (!type->read_data(usbtouch, pkt)) 1309 return; 1310 1311 input_report_key(usbtouch->input, BTN_TOUCH, usbtouch->touch); 1312 1313 if (swap_xy) { 1314 input_report_abs(usbtouch->input, ABS_X, usbtouch->y); 1315 input_report_abs(usbtouch->input, ABS_Y, usbtouch->x); 1316 } else { 1317 input_report_abs(usbtouch->input, ABS_X, usbtouch->x); 1318 input_report_abs(usbtouch->input, ABS_Y, usbtouch->y); 1319 } 1320 if (type->max_press) 1321 input_report_abs(usbtouch->input, ABS_PRESSURE, usbtouch->press); 1322 input_sync(usbtouch->input); 1323 } 1324 1325 1326 #ifdef MULTI_PACKET 1327 static void usbtouch_process_multi(struct usbtouch_usb *usbtouch, 1328 unsigned char *pkt, int len) 1329 { 1330 unsigned char *buffer; 1331 int pkt_len, pos, buf_len, tmp; 1332 1333 /* process buffer */ 1334 if (unlikely(usbtouch->buf_len)) { 1335 /* try to get size */ 1336 pkt_len = usbtouch->type->get_pkt_len( 1337 usbtouch->buffer, usbtouch->buf_len); 1338 1339 /* drop? */ 1340 if (unlikely(!pkt_len)) 1341 goto out_flush_buf; 1342 1343 /* need to append -pkt_len bytes before able to get size */ 1344 if (unlikely(pkt_len < 0)) { 1345 int append = -pkt_len; 1346 if (unlikely(append > len)) 1347 append = len; 1348 if (usbtouch->buf_len + append >= usbtouch->type->rept_size) 1349 goto out_flush_buf; 1350 memcpy(usbtouch->buffer + usbtouch->buf_len, pkt, append); 1351 usbtouch->buf_len += append; 1352 1353 pkt_len = usbtouch->type->get_pkt_len( 1354 usbtouch->buffer, usbtouch->buf_len); 1355 if (pkt_len < 0) 1356 return; 1357 } 1358 1359 /* append */ 1360 tmp = pkt_len - usbtouch->buf_len; 1361 if (usbtouch->buf_len + tmp >= usbtouch->type->rept_size) 1362 goto out_flush_buf; 1363 memcpy(usbtouch->buffer + usbtouch->buf_len, pkt, tmp); 1364 usbtouch_process_pkt(usbtouch, usbtouch->buffer, pkt_len); 1365 1366 buffer = pkt + tmp; 1367 buf_len = len - tmp; 1368 } else { 1369 buffer = pkt; 1370 buf_len = len; 1371 } 1372 1373 /* loop over the received packet, process */ 1374 pos = 0; 1375 while (pos < buf_len) { 1376 /* get packet len */ 1377 pkt_len = usbtouch->type->get_pkt_len(buffer + pos, 1378 buf_len - pos); 1379 1380 /* unknown packet: skip one byte */ 1381 if (unlikely(!pkt_len)) { 1382 pos++; 1383 continue; 1384 } 1385 1386 /* full packet: process */ 1387 if (likely((pkt_len > 0) && (pkt_len <= buf_len - pos))) { 1388 usbtouch_process_pkt(usbtouch, buffer + pos, pkt_len); 1389 } else { 1390 /* incomplete packet: save in buffer */ 1391 memcpy(usbtouch->buffer, buffer + pos, buf_len - pos); 1392 usbtouch->buf_len = buf_len - pos; 1393 return; 1394 } 1395 pos += pkt_len; 1396 } 1397 1398 out_flush_buf: 1399 usbtouch->buf_len = 0; 1400 return; 1401 } 1402 #endif 1403 1404 1405 static void usbtouch_irq(struct urb *urb) 1406 { 1407 struct usbtouch_usb *usbtouch = urb->context; 1408 struct device *dev = &usbtouch->interface->dev; 1409 int retval; 1410 1411 switch (urb->status) { 1412 case 0: 1413 /* success */ 1414 break; 1415 case -ETIME: 1416 /* this urb is timing out */ 1417 dev_dbg(dev, 1418 "%s - urb timed out - was the device unplugged?\n", 1419 __func__); 1420 return; 1421 case -ECONNRESET: 1422 case -ENOENT: 1423 case -ESHUTDOWN: 1424 case -EPIPE: 1425 /* this urb is terminated, clean up */ 1426 dev_dbg(dev, "%s - urb shutting down with status: %d\n", 1427 __func__, urb->status); 1428 return; 1429 default: 1430 dev_dbg(dev, "%s - nonzero urb status received: %d\n", 1431 __func__, urb->status); 1432 goto exit; 1433 } 1434 1435 usbtouch->type->process_pkt(usbtouch, usbtouch->data, urb->actual_length); 1436 1437 exit: 1438 usb_mark_last_busy(interface_to_usbdev(usbtouch->interface)); 1439 retval = usb_submit_urb(urb, GFP_ATOMIC); 1440 if (retval) 1441 dev_err(dev, "%s - usb_submit_urb failed with result: %d\n", 1442 __func__, retval); 1443 } 1444 1445 static int usbtouch_open(struct input_dev *input) 1446 { 1447 struct usbtouch_usb *usbtouch = input_get_drvdata(input); 1448 int r; 1449 1450 usbtouch->irq->dev = interface_to_usbdev(usbtouch->interface); 1451 1452 r = usb_autopm_get_interface(usbtouch->interface) ? -EIO : 0; 1453 if (r < 0) 1454 goto out; 1455 1456 mutex_lock(&usbtouch->pm_mutex); 1457 if (!usbtouch->type->irq_always) { 1458 if (usb_submit_urb(usbtouch->irq, GFP_KERNEL)) { 1459 r = -EIO; 1460 goto out_put; 1461 } 1462 } 1463 1464 usbtouch->interface->needs_remote_wakeup = 1; 1465 usbtouch->is_open = true; 1466 out_put: 1467 mutex_unlock(&usbtouch->pm_mutex); 1468 usb_autopm_put_interface(usbtouch->interface); 1469 out: 1470 return r; 1471 } 1472 1473 static void usbtouch_close(struct input_dev *input) 1474 { 1475 struct usbtouch_usb *usbtouch = input_get_drvdata(input); 1476 int r; 1477 1478 mutex_lock(&usbtouch->pm_mutex); 1479 if (!usbtouch->type->irq_always) 1480 usb_kill_urb(usbtouch->irq); 1481 usbtouch->is_open = false; 1482 mutex_unlock(&usbtouch->pm_mutex); 1483 1484 r = usb_autopm_get_interface(usbtouch->interface); 1485 usbtouch->interface->needs_remote_wakeup = 0; 1486 if (!r) 1487 usb_autopm_put_interface(usbtouch->interface); 1488 } 1489 1490 static int usbtouch_suspend 1491 (struct usb_interface *intf, pm_message_t message) 1492 { 1493 struct usbtouch_usb *usbtouch = usb_get_intfdata(intf); 1494 1495 usb_kill_urb(usbtouch->irq); 1496 1497 return 0; 1498 } 1499 1500 static int usbtouch_resume(struct usb_interface *intf) 1501 { 1502 struct usbtouch_usb *usbtouch = usb_get_intfdata(intf); 1503 int result = 0; 1504 1505 mutex_lock(&usbtouch->pm_mutex); 1506 if (usbtouch->is_open || usbtouch->type->irq_always) 1507 result = usb_submit_urb(usbtouch->irq, GFP_NOIO); 1508 mutex_unlock(&usbtouch->pm_mutex); 1509 1510 return result; 1511 } 1512 1513 static int usbtouch_reset_resume(struct usb_interface *intf) 1514 { 1515 struct usbtouch_usb *usbtouch = usb_get_intfdata(intf); 1516 int err = 0; 1517 1518 /* reinit the device */ 1519 if (usbtouch->type->init) { 1520 err = usbtouch->type->init(usbtouch); 1521 if (err) { 1522 dev_dbg(&intf->dev, 1523 "%s - type->init() failed, err: %d\n", 1524 __func__, err); 1525 return err; 1526 } 1527 } 1528 1529 /* restart IO if needed */ 1530 mutex_lock(&usbtouch->pm_mutex); 1531 if (usbtouch->is_open) 1532 err = usb_submit_urb(usbtouch->irq, GFP_NOIO); 1533 mutex_unlock(&usbtouch->pm_mutex); 1534 1535 return err; 1536 } 1537 1538 static void usbtouch_free_buffers(struct usb_device *udev, 1539 struct usbtouch_usb *usbtouch) 1540 { 1541 usb_free_coherent(udev, usbtouch->data_size, 1542 usbtouch->data, usbtouch->data_dma); 1543 kfree(usbtouch->buffer); 1544 } 1545 1546 static struct usb_endpoint_descriptor * 1547 usbtouch_get_input_endpoint(struct usb_host_interface *interface) 1548 { 1549 int i; 1550 1551 for (i = 0; i < interface->desc.bNumEndpoints; i++) 1552 if (usb_endpoint_dir_in(&interface->endpoint[i].desc)) 1553 return &interface->endpoint[i].desc; 1554 1555 return NULL; 1556 } 1557 1558 static int usbtouch_probe(struct usb_interface *intf, 1559 const struct usb_device_id *id) 1560 { 1561 struct usbtouch_usb *usbtouch; 1562 struct input_dev *input_dev; 1563 struct usb_endpoint_descriptor *endpoint; 1564 struct usb_device *udev = interface_to_usbdev(intf); 1565 struct usbtouch_device_info *type; 1566 int err = -ENOMEM; 1567 1568 /* some devices are ignored */ 1569 if (id->driver_info == DEVTYPE_IGNORE) 1570 return -ENODEV; 1571 1572 endpoint = usbtouch_get_input_endpoint(intf->cur_altsetting); 1573 if (!endpoint) 1574 return -ENXIO; 1575 1576 usbtouch = kzalloc(sizeof(struct usbtouch_usb), GFP_KERNEL); 1577 input_dev = input_allocate_device(); 1578 if (!usbtouch || !input_dev) 1579 goto out_free; 1580 1581 type = &usbtouch_dev_info[id->driver_info]; 1582 usbtouch->type = type; 1583 if (!type->process_pkt) 1584 type->process_pkt = usbtouch_process_pkt; 1585 1586 usbtouch->data_size = type->rept_size; 1587 if (type->get_pkt_len) { 1588 /* 1589 * When dealing with variable-length packets we should 1590 * not request more than wMaxPacketSize bytes at once 1591 * as we do not know if there is more data coming or 1592 * we filled exactly wMaxPacketSize bytes and there is 1593 * nothing else. 1594 */ 1595 usbtouch->data_size = min(usbtouch->data_size, 1596 usb_endpoint_maxp(endpoint)); 1597 } 1598 1599 usbtouch->data = usb_alloc_coherent(udev, usbtouch->data_size, 1600 GFP_KERNEL, &usbtouch->data_dma); 1601 if (!usbtouch->data) 1602 goto out_free; 1603 1604 if (type->get_pkt_len) { 1605 usbtouch->buffer = kmalloc(type->rept_size, GFP_KERNEL); 1606 if (!usbtouch->buffer) 1607 goto out_free_buffers; 1608 } 1609 1610 usbtouch->irq = usb_alloc_urb(0, GFP_KERNEL); 1611 if (!usbtouch->irq) { 1612 dev_dbg(&intf->dev, 1613 "%s - usb_alloc_urb failed: usbtouch->irq\n", __func__); 1614 goto out_free_buffers; 1615 } 1616 1617 usbtouch->interface = intf; 1618 usbtouch->input = input_dev; 1619 1620 if (udev->manufacturer) 1621 strlcpy(usbtouch->name, udev->manufacturer, sizeof(usbtouch->name)); 1622 1623 if (udev->product) { 1624 if (udev->manufacturer) 1625 strlcat(usbtouch->name, " ", sizeof(usbtouch->name)); 1626 strlcat(usbtouch->name, udev->product, sizeof(usbtouch->name)); 1627 } 1628 1629 if (!strlen(usbtouch->name)) 1630 snprintf(usbtouch->name, sizeof(usbtouch->name), 1631 "USB Touchscreen %04x:%04x", 1632 le16_to_cpu(udev->descriptor.idVendor), 1633 le16_to_cpu(udev->descriptor.idProduct)); 1634 1635 usb_make_path(udev, usbtouch->phys, sizeof(usbtouch->phys)); 1636 strlcat(usbtouch->phys, "/input0", sizeof(usbtouch->phys)); 1637 1638 input_dev->name = usbtouch->name; 1639 input_dev->phys = usbtouch->phys; 1640 usb_to_input_id(udev, &input_dev->id); 1641 input_dev->dev.parent = &intf->dev; 1642 1643 input_set_drvdata(input_dev, usbtouch); 1644 1645 input_dev->open = usbtouch_open; 1646 input_dev->close = usbtouch_close; 1647 1648 input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS); 1649 input_dev->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH); 1650 input_set_abs_params(input_dev, ABS_X, type->min_xc, type->max_xc, 0, 0); 1651 input_set_abs_params(input_dev, ABS_Y, type->min_yc, type->max_yc, 0, 0); 1652 if (type->max_press) 1653 input_set_abs_params(input_dev, ABS_PRESSURE, type->min_press, 1654 type->max_press, 0, 0); 1655 1656 if (usb_endpoint_type(endpoint) == USB_ENDPOINT_XFER_INT) 1657 usb_fill_int_urb(usbtouch->irq, udev, 1658 usb_rcvintpipe(udev, endpoint->bEndpointAddress), 1659 usbtouch->data, usbtouch->data_size, 1660 usbtouch_irq, usbtouch, endpoint->bInterval); 1661 else 1662 usb_fill_bulk_urb(usbtouch->irq, udev, 1663 usb_rcvbulkpipe(udev, endpoint->bEndpointAddress), 1664 usbtouch->data, usbtouch->data_size, 1665 usbtouch_irq, usbtouch); 1666 1667 usbtouch->irq->dev = udev; 1668 usbtouch->irq->transfer_dma = usbtouch->data_dma; 1669 usbtouch->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; 1670 1671 /* device specific allocations */ 1672 if (type->alloc) { 1673 err = type->alloc(usbtouch); 1674 if (err) { 1675 dev_dbg(&intf->dev, 1676 "%s - type->alloc() failed, err: %d\n", 1677 __func__, err); 1678 goto out_free_urb; 1679 } 1680 } 1681 1682 /* device specific initialisation*/ 1683 if (type->init) { 1684 err = type->init(usbtouch); 1685 if (err) { 1686 dev_dbg(&intf->dev, 1687 "%s - type->init() failed, err: %d\n", 1688 __func__, err); 1689 goto out_do_exit; 1690 } 1691 } 1692 1693 err = input_register_device(usbtouch->input); 1694 if (err) { 1695 dev_dbg(&intf->dev, 1696 "%s - input_register_device failed, err: %d\n", 1697 __func__, err); 1698 goto out_do_exit; 1699 } 1700 1701 usb_set_intfdata(intf, usbtouch); 1702 1703 if (usbtouch->type->irq_always) { 1704 /* this can't fail */ 1705 usb_autopm_get_interface(intf); 1706 err = usb_submit_urb(usbtouch->irq, GFP_KERNEL); 1707 if (err) { 1708 usb_autopm_put_interface(intf); 1709 dev_err(&intf->dev, 1710 "%s - usb_submit_urb failed with result: %d\n", 1711 __func__, err); 1712 goto out_unregister_input; 1713 } 1714 } 1715 1716 return 0; 1717 1718 out_unregister_input: 1719 input_unregister_device(input_dev); 1720 input_dev = NULL; 1721 out_do_exit: 1722 if (type->exit) 1723 type->exit(usbtouch); 1724 out_free_urb: 1725 usb_free_urb(usbtouch->irq); 1726 out_free_buffers: 1727 usbtouch_free_buffers(udev, usbtouch); 1728 out_free: 1729 input_free_device(input_dev); 1730 kfree(usbtouch); 1731 return err; 1732 } 1733 1734 static void usbtouch_disconnect(struct usb_interface *intf) 1735 { 1736 struct usbtouch_usb *usbtouch = usb_get_intfdata(intf); 1737 1738 if (!usbtouch) 1739 return; 1740 1741 dev_dbg(&intf->dev, 1742 "%s - usbtouch is initialized, cleaning up\n", __func__); 1743 1744 usb_set_intfdata(intf, NULL); 1745 /* this will stop IO via close */ 1746 input_unregister_device(usbtouch->input); 1747 usb_free_urb(usbtouch->irq); 1748 if (usbtouch->type->exit) 1749 usbtouch->type->exit(usbtouch); 1750 usbtouch_free_buffers(interface_to_usbdev(intf), usbtouch); 1751 kfree(usbtouch); 1752 } 1753 1754 MODULE_DEVICE_TABLE(usb, usbtouch_devices); 1755 1756 static struct usb_driver usbtouch_driver = { 1757 .name = "usbtouchscreen", 1758 .probe = usbtouch_probe, 1759 .disconnect = usbtouch_disconnect, 1760 .suspend = usbtouch_suspend, 1761 .resume = usbtouch_resume, 1762 .reset_resume = usbtouch_reset_resume, 1763 .id_table = usbtouch_devices, 1764 .supports_autosuspend = 1, 1765 }; 1766 1767 module_usb_driver(usbtouch_driver); 1768 1769 MODULE_AUTHOR("Daniel Ritz <daniel.ritz@gmx.ch>"); 1770 MODULE_DESCRIPTION("USB Touchscreen Driver"); 1771 MODULE_LICENSE("GPL"); 1772 1773 MODULE_ALIAS("touchkitusb"); 1774 MODULE_ALIAS("itmtouch"); 1775 MODULE_ALIAS("mtouchusb"); 1776