1 /****************************************************************************** 2 * usbtouchscreen.c 3 * Driver for USB Touchscreens, supporting those devices: 4 * - eGalax Touchkit 5 * includes eTurboTouch CT-410/510/700 6 * - 3M/Microtouch EX II series 7 * - ITM 8 * - PanJit TouchSet 9 * - eTurboTouch 10 * - Gunze AHL61 11 * - DMC TSC-10/25 12 * - IRTOUCHSYSTEMS/UNITOP 13 * - IdealTEK URTC1000 14 * - General Touch 15 * - GoTop Super_Q2/GogoPen/PenPower tablets 16 * - JASTEC USB touch controller/DigiTech DTR-02U 17 * - Zytronic capacitive touchscreen 18 * - NEXIO/iNexio 19 * 20 * Copyright (C) 2004-2007 by Daniel Ritz <daniel.ritz@gmx.ch> 21 * Copyright (C) by Todd E. Johnson (mtouchusb.c) 22 * 23 * This program is free software; you can redistribute it and/or 24 * modify it under the terms of the GNU General Public License as 25 * published by the Free Software Foundation; either version 2 of the 26 * License, or (at your option) any later version. 27 * 28 * This program is distributed in the hope that it will be useful, but 29 * WITHOUT ANY WARRANTY; without even the implied warranty of 30 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 31 * General Public License for more details. 32 * 33 * You should have received a copy of the GNU General Public License 34 * along with this program; if not, write to the Free Software 35 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 36 * 37 * Driver is based on touchkitusb.c 38 * - ITM parts are from itmtouch.c 39 * - 3M parts are from mtouchusb.c 40 * - PanJit parts are from an unmerged driver by Lanslott Gish 41 * - DMC TSC 10/25 are from Holger Schurig, with ideas from an unmerged 42 * driver from Marius Vollmer 43 * 44 *****************************************************************************/ 45 46 //#define DEBUG 47 48 #include <linux/kernel.h> 49 #include <linux/slab.h> 50 #include <linux/input.h> 51 #include <linux/module.h> 52 #include <linux/init.h> 53 #include <linux/usb.h> 54 #include <linux/usb/input.h> 55 #include <linux/hid.h> 56 57 58 #define DRIVER_VERSION "v0.6" 59 #define DRIVER_AUTHOR "Daniel Ritz <daniel.ritz@gmx.ch>" 60 #define DRIVER_DESC "USB Touchscreen Driver" 61 62 static int swap_xy; 63 module_param(swap_xy, bool, 0644); 64 MODULE_PARM_DESC(swap_xy, "If set X and Y axes are swapped."); 65 66 static int hwcalib_xy; 67 module_param(hwcalib_xy, bool, 0644); 68 MODULE_PARM_DESC(hwcalib_xy, "If set hw-calibrated X/Y are used if available"); 69 70 /* device specifc data/functions */ 71 struct usbtouch_usb; 72 struct usbtouch_device_info { 73 int min_xc, max_xc; 74 int min_yc, max_yc; 75 int min_press, max_press; 76 int rept_size; 77 78 /* 79 * Always service the USB devices irq not just when the input device is 80 * open. This is useful when devices have a watchdog which prevents us 81 * from periodically polling the device. Leave this unset unless your 82 * touchscreen device requires it, as it does consume more of the USB 83 * bandwidth. 84 */ 85 bool irq_always; 86 87 void (*process_pkt) (struct usbtouch_usb *usbtouch, unsigned char *pkt, int len); 88 89 /* 90 * used to get the packet len. possible return values: 91 * > 0: packet len 92 * = 0: skip one byte 93 * < 0: -return value more bytes needed 94 */ 95 int (*get_pkt_len) (unsigned char *pkt, int len); 96 97 int (*read_data) (struct usbtouch_usb *usbtouch, unsigned char *pkt); 98 int (*alloc) (struct usbtouch_usb *usbtouch); 99 int (*init) (struct usbtouch_usb *usbtouch); 100 void (*exit) (struct usbtouch_usb *usbtouch); 101 }; 102 103 /* a usbtouch device */ 104 struct usbtouch_usb { 105 unsigned char *data; 106 dma_addr_t data_dma; 107 unsigned char *buffer; 108 int buf_len; 109 struct urb *irq; 110 struct usb_interface *interface; 111 struct input_dev *input; 112 struct usbtouch_device_info *type; 113 char name[128]; 114 char phys[64]; 115 void *priv; 116 117 int x, y; 118 int touch, press; 119 }; 120 121 122 /* device types */ 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_IDEALTEK, 134 DEVTYPE_GENERAL_TOUCH, 135 DEVTYPE_GOTOP, 136 DEVTYPE_JASTEC, 137 DEVTYPE_E2I, 138 DEVTYPE_ZYTRONIC, 139 DEVTYPE_TC45USB, 140 DEVTYPE_NEXIO, 141 }; 142 143 #define USB_DEVICE_HID_CLASS(vend, prod) \ 144 .match_flags = USB_DEVICE_ID_MATCH_INT_CLASS \ 145 | USB_DEVICE_ID_MATCH_INT_PROTOCOL \ 146 | USB_DEVICE_ID_MATCH_DEVICE, \ 147 .idVendor = (vend), \ 148 .idProduct = (prod), \ 149 .bInterfaceClass = USB_INTERFACE_CLASS_HID, \ 150 .bInterfaceProtocol = USB_INTERFACE_PROTOCOL_MOUSE 151 152 static const struct usb_device_id usbtouch_devices[] = { 153 #ifdef CONFIG_TOUCHSCREEN_USB_EGALAX 154 /* ignore the HID capable devices, handled by usbhid */ 155 {USB_DEVICE_HID_CLASS(0x0eef, 0x0001), .driver_info = DEVTYPE_IGNORE}, 156 {USB_DEVICE_HID_CLASS(0x0eef, 0x0002), .driver_info = DEVTYPE_IGNORE}, 157 158 /* normal device IDs */ 159 {USB_DEVICE(0x3823, 0x0001), .driver_info = DEVTYPE_EGALAX}, 160 {USB_DEVICE(0x3823, 0x0002), .driver_info = DEVTYPE_EGALAX}, 161 {USB_DEVICE(0x0123, 0x0001), .driver_info = DEVTYPE_EGALAX}, 162 {USB_DEVICE(0x0eef, 0x0001), .driver_info = DEVTYPE_EGALAX}, 163 {USB_DEVICE(0x0eef, 0x0002), .driver_info = DEVTYPE_EGALAX}, 164 {USB_DEVICE(0x1234, 0x0001), .driver_info = DEVTYPE_EGALAX}, 165 {USB_DEVICE(0x1234, 0x0002), .driver_info = DEVTYPE_EGALAX}, 166 #endif 167 168 #ifdef CONFIG_TOUCHSCREEN_USB_PANJIT 169 {USB_DEVICE(0x134c, 0x0001), .driver_info = DEVTYPE_PANJIT}, 170 {USB_DEVICE(0x134c, 0x0002), .driver_info = DEVTYPE_PANJIT}, 171 {USB_DEVICE(0x134c, 0x0003), .driver_info = DEVTYPE_PANJIT}, 172 {USB_DEVICE(0x134c, 0x0004), .driver_info = DEVTYPE_PANJIT}, 173 #endif 174 175 #ifdef CONFIG_TOUCHSCREEN_USB_3M 176 {USB_DEVICE(0x0596, 0x0001), .driver_info = DEVTYPE_3M}, 177 #endif 178 179 #ifdef CONFIG_TOUCHSCREEN_USB_ITM 180 {USB_DEVICE(0x0403, 0xf9e9), .driver_info = DEVTYPE_ITM}, 181 #endif 182 183 #ifdef CONFIG_TOUCHSCREEN_USB_ETURBO 184 {USB_DEVICE(0x1234, 0x5678), .driver_info = DEVTYPE_ETURBO}, 185 #endif 186 187 #ifdef CONFIG_TOUCHSCREEN_USB_GUNZE 188 {USB_DEVICE(0x0637, 0x0001), .driver_info = DEVTYPE_GUNZE}, 189 #endif 190 191 #ifdef CONFIG_TOUCHSCREEN_USB_DMC_TSC10 192 {USB_DEVICE(0x0afa, 0x03e8), .driver_info = DEVTYPE_DMC_TSC10}, 193 #endif 194 195 #ifdef CONFIG_TOUCHSCREEN_USB_IRTOUCH 196 {USB_DEVICE(0x595a, 0x0001), .driver_info = DEVTYPE_IRTOUCH}, 197 {USB_DEVICE(0x6615, 0x0001), .driver_info = DEVTYPE_IRTOUCH}, 198 #endif 199 200 #ifdef CONFIG_TOUCHSCREEN_USB_IDEALTEK 201 {USB_DEVICE(0x1391, 0x1000), .driver_info = DEVTYPE_IDEALTEK}, 202 #endif 203 204 #ifdef CONFIG_TOUCHSCREEN_USB_GENERAL_TOUCH 205 {USB_DEVICE(0x0dfc, 0x0001), .driver_info = DEVTYPE_GENERAL_TOUCH}, 206 #endif 207 208 #ifdef CONFIG_TOUCHSCREEN_USB_GOTOP 209 {USB_DEVICE(0x08f2, 0x007f), .driver_info = DEVTYPE_GOTOP}, 210 {USB_DEVICE(0x08f2, 0x00ce), .driver_info = DEVTYPE_GOTOP}, 211 {USB_DEVICE(0x08f2, 0x00f4), .driver_info = DEVTYPE_GOTOP}, 212 #endif 213 214 #ifdef CONFIG_TOUCHSCREEN_USB_JASTEC 215 {USB_DEVICE(0x0f92, 0x0001), .driver_info = DEVTYPE_JASTEC}, 216 #endif 217 218 #ifdef CONFIG_TOUCHSCREEN_USB_E2I 219 {USB_DEVICE(0x1ac7, 0x0001), .driver_info = DEVTYPE_E2I}, 220 #endif 221 222 #ifdef CONFIG_TOUCHSCREEN_USB_ZYTRONIC 223 {USB_DEVICE(0x14c8, 0x0003), .driver_info = DEVTYPE_ZYTRONIC}, 224 #endif 225 226 #ifdef CONFIG_TOUCHSCREEN_USB_ETT_TC45USB 227 /* TC5UH */ 228 {USB_DEVICE(0x0664, 0x0309), .driver_info = DEVTYPE_TC45USB}, 229 /* TC4UM */ 230 {USB_DEVICE(0x0664, 0x0306), .driver_info = DEVTYPE_TC45USB}, 231 #endif 232 233 #ifdef CONFIG_TOUCHSCREEN_USB_NEXIO 234 /* data interface only */ 235 {USB_DEVICE_AND_INTERFACE_INFO(0x10f0, 0x2002, 0x0a, 0x00, 0x00), 236 .driver_info = DEVTYPE_NEXIO}, 237 {USB_DEVICE_AND_INTERFACE_INFO(0x1870, 0x0001, 0x0a, 0x00, 0x00), 238 .driver_info = DEVTYPE_NEXIO}, 239 #endif 240 241 {} 242 }; 243 244 245 /***************************************************************************** 246 * e2i Part 247 */ 248 249 #ifdef CONFIG_TOUCHSCREEN_USB_E2I 250 static int e2i_init(struct usbtouch_usb *usbtouch) 251 { 252 int ret; 253 struct usb_device *udev = interface_to_usbdev(usbtouch->interface); 254 255 ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0), 256 0x01, 0x02, 0x0000, 0x0081, 257 NULL, 0, USB_CTRL_SET_TIMEOUT); 258 259 dbg("%s - usb_control_msg - E2I_RESET - bytes|err: %d", 260 __func__, ret); 261 return ret; 262 } 263 264 static int e2i_read_data(struct usbtouch_usb *dev, unsigned char *pkt) 265 { 266 int tmp = (pkt[0] << 8) | pkt[1]; 267 dev->x = (pkt[2] << 8) | pkt[3]; 268 dev->y = (pkt[4] << 8) | pkt[5]; 269 270 tmp = tmp - 0xA000; 271 dev->touch = (tmp > 0); 272 dev->press = (tmp > 0 ? tmp : 0); 273 274 return 1; 275 } 276 #endif 277 278 279 /***************************************************************************** 280 * eGalax part 281 */ 282 283 #ifdef CONFIG_TOUCHSCREEN_USB_EGALAX 284 285 #ifndef MULTI_PACKET 286 #define MULTI_PACKET 287 #endif 288 289 #define EGALAX_PKT_TYPE_MASK 0xFE 290 #define EGALAX_PKT_TYPE_REPT 0x80 291 #define EGALAX_PKT_TYPE_DIAG 0x0A 292 293 static int egalax_read_data(struct usbtouch_usb *dev, unsigned char *pkt) 294 { 295 if ((pkt[0] & EGALAX_PKT_TYPE_MASK) != EGALAX_PKT_TYPE_REPT) 296 return 0; 297 298 dev->x = ((pkt[3] & 0x0F) << 7) | (pkt[4] & 0x7F); 299 dev->y = ((pkt[1] & 0x0F) << 7) | (pkt[2] & 0x7F); 300 dev->touch = pkt[0] & 0x01; 301 302 return 1; 303 } 304 305 static int egalax_get_pkt_len(unsigned char *buf, int len) 306 { 307 switch (buf[0] & EGALAX_PKT_TYPE_MASK) { 308 case EGALAX_PKT_TYPE_REPT: 309 return 5; 310 311 case EGALAX_PKT_TYPE_DIAG: 312 if (len < 2) 313 return -1; 314 315 return buf[1] + 2; 316 } 317 318 return 0; 319 } 320 #endif 321 322 323 /***************************************************************************** 324 * PanJit Part 325 */ 326 #ifdef CONFIG_TOUCHSCREEN_USB_PANJIT 327 static int panjit_read_data(struct usbtouch_usb *dev, unsigned char *pkt) 328 { 329 dev->x = ((pkt[2] & 0x0F) << 8) | pkt[1]; 330 dev->y = ((pkt[4] & 0x0F) << 8) | pkt[3]; 331 dev->touch = pkt[0] & 0x01; 332 333 return 1; 334 } 335 #endif 336 337 338 /***************************************************************************** 339 * 3M/Microtouch Part 340 */ 341 #ifdef CONFIG_TOUCHSCREEN_USB_3M 342 343 #define MTOUCHUSB_ASYNC_REPORT 1 344 #define MTOUCHUSB_RESET 7 345 #define MTOUCHUSB_REQ_CTRLLR_ID 10 346 347 static int mtouch_read_data(struct usbtouch_usb *dev, unsigned char *pkt) 348 { 349 if (hwcalib_xy) { 350 dev->x = (pkt[4] << 8) | pkt[3]; 351 dev->y = 0xffff - ((pkt[6] << 8) | pkt[5]); 352 } else { 353 dev->x = (pkt[8] << 8) | pkt[7]; 354 dev->y = (pkt[10] << 8) | pkt[9]; 355 } 356 dev->touch = (pkt[2] & 0x40) ? 1 : 0; 357 358 return 1; 359 } 360 361 static int mtouch_init(struct usbtouch_usb *usbtouch) 362 { 363 int ret, i; 364 struct usb_device *udev = interface_to_usbdev(usbtouch->interface); 365 366 ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0), 367 MTOUCHUSB_RESET, 368 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE, 369 1, 0, NULL, 0, USB_CTRL_SET_TIMEOUT); 370 dbg("%s - usb_control_msg - MTOUCHUSB_RESET - bytes|err: %d", 371 __func__, ret); 372 if (ret < 0) 373 return ret; 374 msleep(150); 375 376 for (i = 0; i < 3; i++) { 377 ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0), 378 MTOUCHUSB_ASYNC_REPORT, 379 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE, 380 1, 1, NULL, 0, USB_CTRL_SET_TIMEOUT); 381 dbg("%s - usb_control_msg - MTOUCHUSB_ASYNC_REPORT - bytes|err: %d", 382 __func__, ret); 383 if (ret >= 0) 384 break; 385 if (ret != -EPIPE) 386 return ret; 387 } 388 389 /* Default min/max xy are the raw values, override if using hw-calib */ 390 if (hwcalib_xy) { 391 input_set_abs_params(usbtouch->input, ABS_X, 0, 0xffff, 0, 0); 392 input_set_abs_params(usbtouch->input, ABS_Y, 0, 0xffff, 0, 0); 393 } 394 395 return 0; 396 } 397 #endif 398 399 400 /***************************************************************************** 401 * ITM Part 402 */ 403 #ifdef CONFIG_TOUCHSCREEN_USB_ITM 404 static int itm_read_data(struct usbtouch_usb *dev, unsigned char *pkt) 405 { 406 int touch; 407 /* 408 * ITM devices report invalid x/y data if not touched. 409 * if the screen was touched before but is not touched any more 410 * report touch as 0 with the last valid x/y data once. then stop 411 * reporting data until touched again. 412 */ 413 dev->press = ((pkt[2] & 0x01) << 7) | (pkt[5] & 0x7F); 414 415 touch = ~pkt[7] & 0x20; 416 if (!touch) { 417 if (dev->touch) { 418 dev->touch = 0; 419 return 1; 420 } 421 422 return 0; 423 } 424 425 dev->x = ((pkt[0] & 0x1F) << 7) | (pkt[3] & 0x7F); 426 dev->y = ((pkt[1] & 0x1F) << 7) | (pkt[4] & 0x7F); 427 dev->touch = touch; 428 429 return 1; 430 } 431 #endif 432 433 434 /***************************************************************************** 435 * eTurboTouch part 436 */ 437 #ifdef CONFIG_TOUCHSCREEN_USB_ETURBO 438 #ifndef MULTI_PACKET 439 #define MULTI_PACKET 440 #endif 441 static int eturbo_read_data(struct usbtouch_usb *dev, unsigned char *pkt) 442 { 443 unsigned int shift; 444 445 /* packets should start with sync */ 446 if (!(pkt[0] & 0x80)) 447 return 0; 448 449 shift = (6 - (pkt[0] & 0x03)); 450 dev->x = ((pkt[3] << 7) | pkt[4]) >> shift; 451 dev->y = ((pkt[1] << 7) | pkt[2]) >> shift; 452 dev->touch = (pkt[0] & 0x10) ? 1 : 0; 453 454 return 1; 455 } 456 457 static int eturbo_get_pkt_len(unsigned char *buf, int len) 458 { 459 if (buf[0] & 0x80) 460 return 5; 461 if (buf[0] == 0x01) 462 return 3; 463 return 0; 464 } 465 #endif 466 467 468 /***************************************************************************** 469 * Gunze part 470 */ 471 #ifdef CONFIG_TOUCHSCREEN_USB_GUNZE 472 static int gunze_read_data(struct usbtouch_usb *dev, unsigned char *pkt) 473 { 474 if (!(pkt[0] & 0x80) || ((pkt[1] | pkt[2] | pkt[3]) & 0x80)) 475 return 0; 476 477 dev->x = ((pkt[0] & 0x1F) << 7) | (pkt[2] & 0x7F); 478 dev->y = ((pkt[1] & 0x1F) << 7) | (pkt[3] & 0x7F); 479 dev->touch = pkt[0] & 0x20; 480 481 return 1; 482 } 483 #endif 484 485 /***************************************************************************** 486 * DMC TSC-10/25 Part 487 * 488 * Documentation about the controller and it's protocol can be found at 489 * http://www.dmccoltd.com/files/controler/tsc10usb_pi_e.pdf 490 * http://www.dmccoltd.com/files/controler/tsc25_usb_e.pdf 491 */ 492 #ifdef CONFIG_TOUCHSCREEN_USB_DMC_TSC10 493 494 /* supported data rates. currently using 130 */ 495 #define TSC10_RATE_POINT 0x50 496 #define TSC10_RATE_30 0x40 497 #define TSC10_RATE_50 0x41 498 #define TSC10_RATE_80 0x42 499 #define TSC10_RATE_100 0x43 500 #define TSC10_RATE_130 0x44 501 #define TSC10_RATE_150 0x45 502 503 /* commands */ 504 #define TSC10_CMD_RESET 0x55 505 #define TSC10_CMD_RATE 0x05 506 #define TSC10_CMD_DATA1 0x01 507 508 static int dmc_tsc10_init(struct usbtouch_usb *usbtouch) 509 { 510 struct usb_device *dev = interface_to_usbdev(usbtouch->interface); 511 int ret = -ENOMEM; 512 unsigned char *buf; 513 514 buf = kmalloc(2, GFP_NOIO); 515 if (!buf) 516 goto err_nobuf; 517 /* reset */ 518 buf[0] = buf[1] = 0xFF; 519 ret = usb_control_msg(dev, usb_rcvctrlpipe (dev, 0), 520 TSC10_CMD_RESET, 521 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE, 522 0, 0, buf, 2, USB_CTRL_SET_TIMEOUT); 523 if (ret < 0) 524 goto err_out; 525 if (buf[0] != 0x06) { 526 ret = -ENODEV; 527 goto err_out; 528 } 529 530 /* set coordinate output rate */ 531 buf[0] = buf[1] = 0xFF; 532 ret = usb_control_msg(dev, usb_rcvctrlpipe (dev, 0), 533 TSC10_CMD_RATE, 534 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE, 535 TSC10_RATE_150, 0, buf, 2, USB_CTRL_SET_TIMEOUT); 536 if (ret < 0) 537 goto err_out; 538 if ((buf[0] != 0x06) && (buf[0] != 0x15 || buf[1] != 0x01)) { 539 ret = -ENODEV; 540 goto err_out; 541 } 542 543 /* start sending data */ 544 ret = usb_control_msg(dev, usb_rcvctrlpipe (dev, 0), 545 TSC10_CMD_DATA1, 546 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE, 547 0, 0, NULL, 0, USB_CTRL_SET_TIMEOUT); 548 err_out: 549 kfree(buf); 550 err_nobuf: 551 return ret; 552 } 553 554 555 static int dmc_tsc10_read_data(struct usbtouch_usb *dev, unsigned char *pkt) 556 { 557 dev->x = ((pkt[2] & 0x03) << 8) | pkt[1]; 558 dev->y = ((pkt[4] & 0x03) << 8) | pkt[3]; 559 dev->touch = pkt[0] & 0x01; 560 561 return 1; 562 } 563 #endif 564 565 566 /***************************************************************************** 567 * IRTOUCH Part 568 */ 569 #ifdef CONFIG_TOUCHSCREEN_USB_IRTOUCH 570 static int irtouch_read_data(struct usbtouch_usb *dev, unsigned char *pkt) 571 { 572 dev->x = (pkt[3] << 8) | pkt[2]; 573 dev->y = (pkt[5] << 8) | pkt[4]; 574 dev->touch = (pkt[1] & 0x03) ? 1 : 0; 575 576 return 1; 577 } 578 #endif 579 580 /***************************************************************************** 581 * ET&T TC5UH/TC4UM part 582 */ 583 #ifdef CONFIG_TOUCHSCREEN_USB_ETT_TC45USB 584 static int tc45usb_read_data(struct usbtouch_usb *dev, unsigned char *pkt) 585 { 586 dev->x = ((pkt[2] & 0x0F) << 8) | pkt[1]; 587 dev->y = ((pkt[4] & 0x0F) << 8) | pkt[3]; 588 dev->touch = pkt[0] & 0x01; 589 590 return 1; 591 } 592 #endif 593 594 /***************************************************************************** 595 * IdealTEK URTC1000 Part 596 */ 597 #ifdef CONFIG_TOUCHSCREEN_USB_IDEALTEK 598 #ifndef MULTI_PACKET 599 #define MULTI_PACKET 600 #endif 601 static int idealtek_get_pkt_len(unsigned char *buf, int len) 602 { 603 if (buf[0] & 0x80) 604 return 5; 605 if (buf[0] == 0x01) 606 return len; 607 return 0; 608 } 609 610 static int idealtek_read_data(struct usbtouch_usb *dev, unsigned char *pkt) 611 { 612 switch (pkt[0] & 0x98) { 613 case 0x88: 614 /* touch data in IdealTEK mode */ 615 dev->x = (pkt[1] << 5) | (pkt[2] >> 2); 616 dev->y = (pkt[3] << 5) | (pkt[4] >> 2); 617 dev->touch = (pkt[0] & 0x40) ? 1 : 0; 618 return 1; 619 620 case 0x98: 621 /* touch data in MT emulation mode */ 622 dev->x = (pkt[2] << 5) | (pkt[1] >> 2); 623 dev->y = (pkt[4] << 5) | (pkt[3] >> 2); 624 dev->touch = (pkt[0] & 0x40) ? 1 : 0; 625 return 1; 626 627 default: 628 return 0; 629 } 630 } 631 #endif 632 633 /***************************************************************************** 634 * General Touch Part 635 */ 636 #ifdef CONFIG_TOUCHSCREEN_USB_GENERAL_TOUCH 637 static int general_touch_read_data(struct usbtouch_usb *dev, unsigned char *pkt) 638 { 639 dev->x = (pkt[2] << 8) | pkt[1]; 640 dev->y = (pkt[4] << 8) | pkt[3]; 641 dev->press = pkt[5] & 0xff; 642 dev->touch = pkt[0] & 0x01; 643 644 return 1; 645 } 646 #endif 647 648 /***************************************************************************** 649 * GoTop Part 650 */ 651 #ifdef CONFIG_TOUCHSCREEN_USB_GOTOP 652 static int gotop_read_data(struct usbtouch_usb *dev, unsigned char *pkt) 653 { 654 dev->x = ((pkt[1] & 0x38) << 4) | pkt[2]; 655 dev->y = ((pkt[1] & 0x07) << 7) | pkt[3]; 656 dev->touch = pkt[0] & 0x01; 657 658 return 1; 659 } 660 #endif 661 662 /***************************************************************************** 663 * JASTEC Part 664 */ 665 #ifdef CONFIG_TOUCHSCREEN_USB_JASTEC 666 static int jastec_read_data(struct usbtouch_usb *dev, unsigned char *pkt) 667 { 668 dev->x = ((pkt[0] & 0x3f) << 6) | (pkt[2] & 0x3f); 669 dev->y = ((pkt[1] & 0x3f) << 6) | (pkt[3] & 0x3f); 670 dev->touch = (pkt[0] & 0x40) >> 6; 671 672 return 1; 673 } 674 #endif 675 676 /***************************************************************************** 677 * Zytronic Part 678 */ 679 #ifdef CONFIG_TOUCHSCREEN_USB_ZYTRONIC 680 static int zytronic_read_data(struct usbtouch_usb *dev, unsigned char *pkt) 681 { 682 switch (pkt[0]) { 683 case 0x3A: /* command response */ 684 dbg("%s: Command response %d", __func__, pkt[1]); 685 break; 686 687 case 0xC0: /* down */ 688 dev->x = (pkt[1] & 0x7f) | ((pkt[2] & 0x07) << 7); 689 dev->y = (pkt[3] & 0x7f) | ((pkt[4] & 0x07) << 7); 690 dev->touch = 1; 691 dbg("%s: down %d,%d", __func__, dev->x, dev->y); 692 return 1; 693 694 case 0x80: /* up */ 695 dev->x = (pkt[1] & 0x7f) | ((pkt[2] & 0x07) << 7); 696 dev->y = (pkt[3] & 0x7f) | ((pkt[4] & 0x07) << 7); 697 dev->touch = 0; 698 dbg("%s: up %d,%d", __func__, dev->x, dev->y); 699 return 1; 700 701 default: 702 dbg("%s: Unknown return %d", __func__, pkt[0]); 703 break; 704 } 705 706 return 0; 707 } 708 #endif 709 710 /***************************************************************************** 711 * NEXIO Part 712 */ 713 #ifdef CONFIG_TOUCHSCREEN_USB_NEXIO 714 715 #define NEXIO_TIMEOUT 5000 716 #define NEXIO_BUFSIZE 1024 717 #define NEXIO_THRESHOLD 50 718 719 struct nexio_priv { 720 struct urb *ack; 721 unsigned char *ack_buf; 722 }; 723 724 struct nexio_touch_packet { 725 u8 flags; /* 0xe1 = touch, 0xe1 = release */ 726 __be16 data_len; /* total bytes of touch data */ 727 __be16 x_len; /* bytes for X axis */ 728 __be16 y_len; /* bytes for Y axis */ 729 u8 data[]; 730 } __attribute__ ((packed)); 731 732 static unsigned char nexio_ack_pkt[2] = { 0xaa, 0x02 }; 733 static unsigned char nexio_init_pkt[4] = { 0x82, 0x04, 0x0a, 0x0f }; 734 735 static void nexio_ack_complete(struct urb *urb) 736 { 737 } 738 739 static int nexio_alloc(struct usbtouch_usb *usbtouch) 740 { 741 struct nexio_priv *priv; 742 int ret = -ENOMEM; 743 744 usbtouch->priv = kmalloc(sizeof(struct nexio_priv), GFP_KERNEL); 745 if (!usbtouch->priv) 746 goto out_buf; 747 748 priv = usbtouch->priv; 749 750 priv->ack_buf = kmemdup(nexio_ack_pkt, sizeof(nexio_ack_pkt), 751 GFP_KERNEL); 752 if (!priv->ack_buf) 753 goto err_priv; 754 755 priv->ack = usb_alloc_urb(0, GFP_KERNEL); 756 if (!priv->ack) { 757 dbg("%s - usb_alloc_urb failed: usbtouch->ack", __func__); 758 goto err_ack_buf; 759 } 760 761 return 0; 762 763 err_ack_buf: 764 kfree(priv->ack_buf); 765 err_priv: 766 kfree(priv); 767 out_buf: 768 return ret; 769 } 770 771 static int nexio_init(struct usbtouch_usb *usbtouch) 772 { 773 struct usb_device *dev = interface_to_usbdev(usbtouch->interface); 774 struct usb_host_interface *interface = usbtouch->interface->cur_altsetting; 775 struct nexio_priv *priv = usbtouch->priv; 776 int ret = -ENOMEM; 777 int actual_len, i; 778 unsigned char *buf; 779 char *firmware_ver = NULL, *device_name = NULL; 780 int input_ep = 0, output_ep = 0; 781 782 /* find first input and output endpoint */ 783 for (i = 0; i < interface->desc.bNumEndpoints; i++) { 784 if (!input_ep && 785 usb_endpoint_dir_in(&interface->endpoint[i].desc)) 786 input_ep = interface->endpoint[i].desc.bEndpointAddress; 787 if (!output_ep && 788 usb_endpoint_dir_out(&interface->endpoint[i].desc)) 789 output_ep = interface->endpoint[i].desc.bEndpointAddress; 790 } 791 if (!input_ep || !output_ep) 792 return -ENXIO; 793 794 buf = kmalloc(NEXIO_BUFSIZE, GFP_NOIO); 795 if (!buf) 796 goto out_buf; 797 798 /* two empty reads */ 799 for (i = 0; i < 2; i++) { 800 ret = usb_bulk_msg(dev, usb_rcvbulkpipe(dev, input_ep), 801 buf, NEXIO_BUFSIZE, &actual_len, 802 NEXIO_TIMEOUT); 803 if (ret < 0) 804 goto out_buf; 805 } 806 807 /* send init command */ 808 memcpy(buf, nexio_init_pkt, sizeof(nexio_init_pkt)); 809 ret = usb_bulk_msg(dev, usb_sndbulkpipe(dev, output_ep), 810 buf, sizeof(nexio_init_pkt), &actual_len, 811 NEXIO_TIMEOUT); 812 if (ret < 0) 813 goto out_buf; 814 815 /* read replies */ 816 for (i = 0; i < 3; i++) { 817 memset(buf, 0, NEXIO_BUFSIZE); 818 ret = usb_bulk_msg(dev, usb_rcvbulkpipe(dev, input_ep), 819 buf, NEXIO_BUFSIZE, &actual_len, 820 NEXIO_TIMEOUT); 821 if (ret < 0 || actual_len < 1 || buf[1] != actual_len) 822 continue; 823 switch (buf[0]) { 824 case 0x83: /* firmware version */ 825 if (!firmware_ver) 826 firmware_ver = kstrdup(&buf[2], GFP_NOIO); 827 break; 828 case 0x84: /* device name */ 829 if (!device_name) 830 device_name = kstrdup(&buf[2], GFP_NOIO); 831 break; 832 } 833 } 834 835 printk(KERN_INFO "Nexio device: %s, firmware version: %s\n", 836 device_name, firmware_ver); 837 838 kfree(firmware_ver); 839 kfree(device_name); 840 841 usb_fill_bulk_urb(priv->ack, dev, usb_sndbulkpipe(dev, output_ep), 842 priv->ack_buf, sizeof(nexio_ack_pkt), 843 nexio_ack_complete, usbtouch); 844 ret = 0; 845 846 out_buf: 847 kfree(buf); 848 return ret; 849 } 850 851 static void nexio_exit(struct usbtouch_usb *usbtouch) 852 { 853 struct nexio_priv *priv = usbtouch->priv; 854 855 usb_kill_urb(priv->ack); 856 usb_free_urb(priv->ack); 857 kfree(priv->ack_buf); 858 kfree(priv); 859 } 860 861 static int nexio_read_data(struct usbtouch_usb *usbtouch, unsigned char *pkt) 862 { 863 struct nexio_touch_packet *packet = (void *) pkt; 864 struct nexio_priv *priv = usbtouch->priv; 865 unsigned int data_len = be16_to_cpu(packet->data_len); 866 unsigned int x_len = be16_to_cpu(packet->x_len); 867 unsigned int y_len = be16_to_cpu(packet->y_len); 868 int x, y, begin_x, begin_y, end_x, end_y, w, h, ret; 869 870 /* got touch data? */ 871 if ((pkt[0] & 0xe0) != 0xe0) 872 return 0; 873 874 if (data_len > 0xff) 875 data_len -= 0x100; 876 if (x_len > 0xff) 877 x_len -= 0x80; 878 879 /* send ACK */ 880 ret = usb_submit_urb(priv->ack, GFP_ATOMIC); 881 882 if (!usbtouch->type->max_xc) { 883 usbtouch->type->max_xc = 2 * x_len; 884 input_set_abs_params(usbtouch->input, ABS_X, 885 0, usbtouch->type->max_xc, 0, 0); 886 usbtouch->type->max_yc = 2 * y_len; 887 input_set_abs_params(usbtouch->input, ABS_Y, 888 0, usbtouch->type->max_yc, 0, 0); 889 } 890 /* 891 * The device reports state of IR sensors on X and Y axes. 892 * Each byte represents "darkness" percentage (0-100) of one element. 893 * 17" touchscreen reports only 64 x 52 bytes so the resolution is low. 894 * This also means that there's a limited multi-touch capability but 895 * it's disabled (and untested) here as there's no X driver for that. 896 */ 897 begin_x = end_x = begin_y = end_y = -1; 898 for (x = 0; x < x_len; x++) { 899 if (begin_x == -1 && packet->data[x] > NEXIO_THRESHOLD) { 900 begin_x = x; 901 continue; 902 } 903 if (end_x == -1 && begin_x != -1 && packet->data[x] < NEXIO_THRESHOLD) { 904 end_x = x - 1; 905 for (y = x_len; y < data_len; y++) { 906 if (begin_y == -1 && packet->data[y] > NEXIO_THRESHOLD) { 907 begin_y = y - x_len; 908 continue; 909 } 910 if (end_y == -1 && 911 begin_y != -1 && packet->data[y] < NEXIO_THRESHOLD) { 912 end_y = y - 1 - x_len; 913 w = end_x - begin_x; 914 h = end_y - begin_y; 915 #if 0 916 /* multi-touch */ 917 input_report_abs(usbtouch->input, 918 ABS_MT_TOUCH_MAJOR, max(w,h)); 919 input_report_abs(usbtouch->input, 920 ABS_MT_TOUCH_MINOR, min(x,h)); 921 input_report_abs(usbtouch->input, 922 ABS_MT_POSITION_X, 2*begin_x+w); 923 input_report_abs(usbtouch->input, 924 ABS_MT_POSITION_Y, 2*begin_y+h); 925 input_report_abs(usbtouch->input, 926 ABS_MT_ORIENTATION, w > h); 927 input_mt_sync(usbtouch->input); 928 #endif 929 /* single touch */ 930 usbtouch->x = 2 * begin_x + w; 931 usbtouch->y = 2 * begin_y + h; 932 usbtouch->touch = packet->flags & 0x01; 933 begin_y = end_y = -1; 934 return 1; 935 } 936 } 937 begin_x = end_x = -1; 938 } 939 940 } 941 return 0; 942 } 943 #endif 944 945 946 /***************************************************************************** 947 * the different device descriptors 948 */ 949 #ifdef MULTI_PACKET 950 static void usbtouch_process_multi(struct usbtouch_usb *usbtouch, 951 unsigned char *pkt, int len); 952 #endif 953 954 static struct usbtouch_device_info usbtouch_dev_info[] = { 955 #ifdef CONFIG_TOUCHSCREEN_USB_EGALAX 956 [DEVTYPE_EGALAX] = { 957 .min_xc = 0x0, 958 .max_xc = 0x07ff, 959 .min_yc = 0x0, 960 .max_yc = 0x07ff, 961 .rept_size = 16, 962 .process_pkt = usbtouch_process_multi, 963 .get_pkt_len = egalax_get_pkt_len, 964 .read_data = egalax_read_data, 965 }, 966 #endif 967 968 #ifdef CONFIG_TOUCHSCREEN_USB_PANJIT 969 [DEVTYPE_PANJIT] = { 970 .min_xc = 0x0, 971 .max_xc = 0x0fff, 972 .min_yc = 0x0, 973 .max_yc = 0x0fff, 974 .rept_size = 8, 975 .read_data = panjit_read_data, 976 }, 977 #endif 978 979 #ifdef CONFIG_TOUCHSCREEN_USB_3M 980 [DEVTYPE_3M] = { 981 .min_xc = 0x0, 982 .max_xc = 0x4000, 983 .min_yc = 0x0, 984 .max_yc = 0x4000, 985 .rept_size = 11, 986 .read_data = mtouch_read_data, 987 .init = mtouch_init, 988 }, 989 #endif 990 991 #ifdef CONFIG_TOUCHSCREEN_USB_ITM 992 [DEVTYPE_ITM] = { 993 .min_xc = 0x0, 994 .max_xc = 0x0fff, 995 .min_yc = 0x0, 996 .max_yc = 0x0fff, 997 .max_press = 0xff, 998 .rept_size = 8, 999 .read_data = itm_read_data, 1000 }, 1001 #endif 1002 1003 #ifdef CONFIG_TOUCHSCREEN_USB_ETURBO 1004 [DEVTYPE_ETURBO] = { 1005 .min_xc = 0x0, 1006 .max_xc = 0x07ff, 1007 .min_yc = 0x0, 1008 .max_yc = 0x07ff, 1009 .rept_size = 8, 1010 .process_pkt = usbtouch_process_multi, 1011 .get_pkt_len = eturbo_get_pkt_len, 1012 .read_data = eturbo_read_data, 1013 }, 1014 #endif 1015 1016 #ifdef CONFIG_TOUCHSCREEN_USB_GUNZE 1017 [DEVTYPE_GUNZE] = { 1018 .min_xc = 0x0, 1019 .max_xc = 0x0fff, 1020 .min_yc = 0x0, 1021 .max_yc = 0x0fff, 1022 .rept_size = 4, 1023 .read_data = gunze_read_data, 1024 }, 1025 #endif 1026 1027 #ifdef CONFIG_TOUCHSCREEN_USB_DMC_TSC10 1028 [DEVTYPE_DMC_TSC10] = { 1029 .min_xc = 0x0, 1030 .max_xc = 0x03ff, 1031 .min_yc = 0x0, 1032 .max_yc = 0x03ff, 1033 .rept_size = 5, 1034 .init = dmc_tsc10_init, 1035 .read_data = dmc_tsc10_read_data, 1036 }, 1037 #endif 1038 1039 #ifdef CONFIG_TOUCHSCREEN_USB_IRTOUCH 1040 [DEVTYPE_IRTOUCH] = { 1041 .min_xc = 0x0, 1042 .max_xc = 0x0fff, 1043 .min_yc = 0x0, 1044 .max_yc = 0x0fff, 1045 .rept_size = 8, 1046 .read_data = irtouch_read_data, 1047 }, 1048 #endif 1049 1050 #ifdef CONFIG_TOUCHSCREEN_USB_IDEALTEK 1051 [DEVTYPE_IDEALTEK] = { 1052 .min_xc = 0x0, 1053 .max_xc = 0x0fff, 1054 .min_yc = 0x0, 1055 .max_yc = 0x0fff, 1056 .rept_size = 8, 1057 .process_pkt = usbtouch_process_multi, 1058 .get_pkt_len = idealtek_get_pkt_len, 1059 .read_data = idealtek_read_data, 1060 }, 1061 #endif 1062 1063 #ifdef CONFIG_TOUCHSCREEN_USB_GENERAL_TOUCH 1064 [DEVTYPE_GENERAL_TOUCH] = { 1065 .min_xc = 0x0, 1066 .max_xc = 0x7fff, 1067 .min_yc = 0x0, 1068 .max_yc = 0x7fff, 1069 .rept_size = 7, 1070 .read_data = general_touch_read_data, 1071 }, 1072 #endif 1073 1074 #ifdef CONFIG_TOUCHSCREEN_USB_GOTOP 1075 [DEVTYPE_GOTOP] = { 1076 .min_xc = 0x0, 1077 .max_xc = 0x03ff, 1078 .min_yc = 0x0, 1079 .max_yc = 0x03ff, 1080 .rept_size = 4, 1081 .read_data = gotop_read_data, 1082 }, 1083 #endif 1084 1085 #ifdef CONFIG_TOUCHSCREEN_USB_JASTEC 1086 [DEVTYPE_JASTEC] = { 1087 .min_xc = 0x0, 1088 .max_xc = 0x0fff, 1089 .min_yc = 0x0, 1090 .max_yc = 0x0fff, 1091 .rept_size = 4, 1092 .read_data = jastec_read_data, 1093 }, 1094 #endif 1095 1096 #ifdef CONFIG_TOUCHSCREEN_USB_E2I 1097 [DEVTYPE_E2I] = { 1098 .min_xc = 0x0, 1099 .max_xc = 0x7fff, 1100 .min_yc = 0x0, 1101 .max_yc = 0x7fff, 1102 .rept_size = 6, 1103 .init = e2i_init, 1104 .read_data = e2i_read_data, 1105 }, 1106 #endif 1107 1108 #ifdef CONFIG_TOUCHSCREEN_USB_ZYTRONIC 1109 [DEVTYPE_ZYTRONIC] = { 1110 .min_xc = 0x0, 1111 .max_xc = 0x03ff, 1112 .min_yc = 0x0, 1113 .max_yc = 0x03ff, 1114 .rept_size = 5, 1115 .read_data = zytronic_read_data, 1116 .irq_always = true, 1117 }, 1118 #endif 1119 1120 #ifdef CONFIG_TOUCHSCREEN_USB_ETT_TC45USB 1121 [DEVTYPE_TC45USB] = { 1122 .min_xc = 0x0, 1123 .max_xc = 0x0fff, 1124 .min_yc = 0x0, 1125 .max_yc = 0x0fff, 1126 .rept_size = 5, 1127 .read_data = tc45usb_read_data, 1128 }, 1129 #endif 1130 1131 #ifdef CONFIG_TOUCHSCREEN_USB_NEXIO 1132 [DEVTYPE_NEXIO] = { 1133 .rept_size = 1024, 1134 .irq_always = true, 1135 .read_data = nexio_read_data, 1136 .alloc = nexio_alloc, 1137 .init = nexio_init, 1138 .exit = nexio_exit, 1139 }, 1140 #endif 1141 }; 1142 1143 1144 /***************************************************************************** 1145 * Generic Part 1146 */ 1147 static void usbtouch_process_pkt(struct usbtouch_usb *usbtouch, 1148 unsigned char *pkt, int len) 1149 { 1150 struct usbtouch_device_info *type = usbtouch->type; 1151 1152 if (!type->read_data(usbtouch, pkt)) 1153 return; 1154 1155 input_report_key(usbtouch->input, BTN_TOUCH, usbtouch->touch); 1156 1157 if (swap_xy) { 1158 input_report_abs(usbtouch->input, ABS_X, usbtouch->y); 1159 input_report_abs(usbtouch->input, ABS_Y, usbtouch->x); 1160 } else { 1161 input_report_abs(usbtouch->input, ABS_X, usbtouch->x); 1162 input_report_abs(usbtouch->input, ABS_Y, usbtouch->y); 1163 } 1164 if (type->max_press) 1165 input_report_abs(usbtouch->input, ABS_PRESSURE, usbtouch->press); 1166 input_sync(usbtouch->input); 1167 } 1168 1169 1170 #ifdef MULTI_PACKET 1171 static void usbtouch_process_multi(struct usbtouch_usb *usbtouch, 1172 unsigned char *pkt, int len) 1173 { 1174 unsigned char *buffer; 1175 int pkt_len, pos, buf_len, tmp; 1176 1177 /* process buffer */ 1178 if (unlikely(usbtouch->buf_len)) { 1179 /* try to get size */ 1180 pkt_len = usbtouch->type->get_pkt_len( 1181 usbtouch->buffer, usbtouch->buf_len); 1182 1183 /* drop? */ 1184 if (unlikely(!pkt_len)) 1185 goto out_flush_buf; 1186 1187 /* need to append -pkt_len bytes before able to get size */ 1188 if (unlikely(pkt_len < 0)) { 1189 int append = -pkt_len; 1190 if (unlikely(append > len)) 1191 append = len; 1192 if (usbtouch->buf_len + append >= usbtouch->type->rept_size) 1193 goto out_flush_buf; 1194 memcpy(usbtouch->buffer + usbtouch->buf_len, pkt, append); 1195 usbtouch->buf_len += append; 1196 1197 pkt_len = usbtouch->type->get_pkt_len( 1198 usbtouch->buffer, usbtouch->buf_len); 1199 if (pkt_len < 0) 1200 return; 1201 } 1202 1203 /* append */ 1204 tmp = pkt_len - usbtouch->buf_len; 1205 if (usbtouch->buf_len + tmp >= usbtouch->type->rept_size) 1206 goto out_flush_buf; 1207 memcpy(usbtouch->buffer + usbtouch->buf_len, pkt, tmp); 1208 usbtouch_process_pkt(usbtouch, usbtouch->buffer, pkt_len); 1209 1210 buffer = pkt + tmp; 1211 buf_len = len - tmp; 1212 } else { 1213 buffer = pkt; 1214 buf_len = len; 1215 } 1216 1217 /* loop over the received packet, process */ 1218 pos = 0; 1219 while (pos < buf_len) { 1220 /* get packet len */ 1221 pkt_len = usbtouch->type->get_pkt_len(buffer + pos, 1222 buf_len - pos); 1223 1224 /* unknown packet: skip one byte */ 1225 if (unlikely(!pkt_len)) { 1226 pos++; 1227 continue; 1228 } 1229 1230 /* full packet: process */ 1231 if (likely((pkt_len > 0) && (pkt_len <= buf_len - pos))) { 1232 usbtouch_process_pkt(usbtouch, buffer + pos, pkt_len); 1233 } else { 1234 /* incomplete packet: save in buffer */ 1235 memcpy(usbtouch->buffer, buffer + pos, buf_len - pos); 1236 usbtouch->buf_len = buf_len - pos; 1237 return; 1238 } 1239 pos += pkt_len; 1240 } 1241 1242 out_flush_buf: 1243 usbtouch->buf_len = 0; 1244 return; 1245 } 1246 #endif 1247 1248 1249 static void usbtouch_irq(struct urb *urb) 1250 { 1251 struct usbtouch_usb *usbtouch = urb->context; 1252 int retval; 1253 1254 switch (urb->status) { 1255 case 0: 1256 /* success */ 1257 break; 1258 case -ETIME: 1259 /* this urb is timing out */ 1260 dbg("%s - urb timed out - was the device unplugged?", 1261 __func__); 1262 return; 1263 case -ECONNRESET: 1264 case -ENOENT: 1265 case -ESHUTDOWN: 1266 case -EPIPE: 1267 /* this urb is terminated, clean up */ 1268 dbg("%s - urb shutting down with status: %d", 1269 __func__, urb->status); 1270 return; 1271 default: 1272 dbg("%s - nonzero urb status received: %d", 1273 __func__, urb->status); 1274 goto exit; 1275 } 1276 1277 usbtouch->type->process_pkt(usbtouch, usbtouch->data, urb->actual_length); 1278 1279 exit: 1280 usb_mark_last_busy(interface_to_usbdev(usbtouch->interface)); 1281 retval = usb_submit_urb(urb, GFP_ATOMIC); 1282 if (retval) 1283 err("%s - usb_submit_urb failed with result: %d", 1284 __func__, retval); 1285 } 1286 1287 static int usbtouch_open(struct input_dev *input) 1288 { 1289 struct usbtouch_usb *usbtouch = input_get_drvdata(input); 1290 int r; 1291 1292 usbtouch->irq->dev = interface_to_usbdev(usbtouch->interface); 1293 1294 r = usb_autopm_get_interface(usbtouch->interface) ? -EIO : 0; 1295 if (r < 0) 1296 goto out; 1297 1298 if (!usbtouch->type->irq_always) { 1299 if (usb_submit_urb(usbtouch->irq, GFP_KERNEL)) { 1300 r = -EIO; 1301 goto out_put; 1302 } 1303 } 1304 1305 usbtouch->interface->needs_remote_wakeup = 1; 1306 out_put: 1307 usb_autopm_put_interface(usbtouch->interface); 1308 out: 1309 return r; 1310 } 1311 1312 static void usbtouch_close(struct input_dev *input) 1313 { 1314 struct usbtouch_usb *usbtouch = input_get_drvdata(input); 1315 int r; 1316 1317 if (!usbtouch->type->irq_always) 1318 usb_kill_urb(usbtouch->irq); 1319 r = usb_autopm_get_interface(usbtouch->interface); 1320 usbtouch->interface->needs_remote_wakeup = 0; 1321 if (!r) 1322 usb_autopm_put_interface(usbtouch->interface); 1323 } 1324 1325 static int usbtouch_suspend 1326 (struct usb_interface *intf, pm_message_t message) 1327 { 1328 struct usbtouch_usb *usbtouch = usb_get_intfdata(intf); 1329 1330 usb_kill_urb(usbtouch->irq); 1331 1332 return 0; 1333 } 1334 1335 static int usbtouch_resume(struct usb_interface *intf) 1336 { 1337 struct usbtouch_usb *usbtouch = usb_get_intfdata(intf); 1338 struct input_dev *input = usbtouch->input; 1339 int result = 0; 1340 1341 mutex_lock(&input->mutex); 1342 if (input->users || usbtouch->type->irq_always) 1343 result = usb_submit_urb(usbtouch->irq, GFP_NOIO); 1344 mutex_unlock(&input->mutex); 1345 1346 return result; 1347 } 1348 1349 static int usbtouch_reset_resume(struct usb_interface *intf) 1350 { 1351 struct usbtouch_usb *usbtouch = usb_get_intfdata(intf); 1352 struct input_dev *input = usbtouch->input; 1353 int err = 0; 1354 1355 /* reinit the device */ 1356 if (usbtouch->type->init) { 1357 err = usbtouch->type->init(usbtouch); 1358 if (err) { 1359 dbg("%s - type->init() failed, err: %d", 1360 __func__, err); 1361 return err; 1362 } 1363 } 1364 1365 /* restart IO if needed */ 1366 mutex_lock(&input->mutex); 1367 if (input->users) 1368 err = usb_submit_urb(usbtouch->irq, GFP_NOIO); 1369 mutex_unlock(&input->mutex); 1370 1371 return err; 1372 } 1373 1374 static void usbtouch_free_buffers(struct usb_device *udev, 1375 struct usbtouch_usb *usbtouch) 1376 { 1377 usb_free_coherent(udev, usbtouch->type->rept_size, 1378 usbtouch->data, usbtouch->data_dma); 1379 kfree(usbtouch->buffer); 1380 } 1381 1382 static struct usb_endpoint_descriptor * 1383 usbtouch_get_input_endpoint(struct usb_host_interface *interface) 1384 { 1385 int i; 1386 1387 for (i = 0; i < interface->desc.bNumEndpoints; i++) 1388 if (usb_endpoint_dir_in(&interface->endpoint[i].desc)) 1389 return &interface->endpoint[i].desc; 1390 1391 return NULL; 1392 } 1393 1394 static int usbtouch_probe(struct usb_interface *intf, 1395 const struct usb_device_id *id) 1396 { 1397 struct usbtouch_usb *usbtouch; 1398 struct input_dev *input_dev; 1399 struct usb_endpoint_descriptor *endpoint; 1400 struct usb_device *udev = interface_to_usbdev(intf); 1401 struct usbtouch_device_info *type; 1402 int err = -ENOMEM; 1403 1404 /* some devices are ignored */ 1405 if (id->driver_info == DEVTYPE_IGNORE) 1406 return -ENODEV; 1407 1408 endpoint = usbtouch_get_input_endpoint(intf->cur_altsetting); 1409 if (!endpoint) 1410 return -ENXIO; 1411 1412 usbtouch = kzalloc(sizeof(struct usbtouch_usb), GFP_KERNEL); 1413 input_dev = input_allocate_device(); 1414 if (!usbtouch || !input_dev) 1415 goto out_free; 1416 1417 type = &usbtouch_dev_info[id->driver_info]; 1418 usbtouch->type = type; 1419 if (!type->process_pkt) 1420 type->process_pkt = usbtouch_process_pkt; 1421 1422 usbtouch->data = usb_alloc_coherent(udev, type->rept_size, 1423 GFP_KERNEL, &usbtouch->data_dma); 1424 if (!usbtouch->data) 1425 goto out_free; 1426 1427 if (type->get_pkt_len) { 1428 usbtouch->buffer = kmalloc(type->rept_size, GFP_KERNEL); 1429 if (!usbtouch->buffer) 1430 goto out_free_buffers; 1431 } 1432 1433 usbtouch->irq = usb_alloc_urb(0, GFP_KERNEL); 1434 if (!usbtouch->irq) { 1435 dbg("%s - usb_alloc_urb failed: usbtouch->irq", __func__); 1436 goto out_free_buffers; 1437 } 1438 1439 usbtouch->interface = intf; 1440 usbtouch->input = input_dev; 1441 1442 if (udev->manufacturer) 1443 strlcpy(usbtouch->name, udev->manufacturer, sizeof(usbtouch->name)); 1444 1445 if (udev->product) { 1446 if (udev->manufacturer) 1447 strlcat(usbtouch->name, " ", sizeof(usbtouch->name)); 1448 strlcat(usbtouch->name, udev->product, sizeof(usbtouch->name)); 1449 } 1450 1451 if (!strlen(usbtouch->name)) 1452 snprintf(usbtouch->name, sizeof(usbtouch->name), 1453 "USB Touchscreen %04x:%04x", 1454 le16_to_cpu(udev->descriptor.idVendor), 1455 le16_to_cpu(udev->descriptor.idProduct)); 1456 1457 usb_make_path(udev, usbtouch->phys, sizeof(usbtouch->phys)); 1458 strlcat(usbtouch->phys, "/input0", sizeof(usbtouch->phys)); 1459 1460 input_dev->name = usbtouch->name; 1461 input_dev->phys = usbtouch->phys; 1462 usb_to_input_id(udev, &input_dev->id); 1463 input_dev->dev.parent = &intf->dev; 1464 1465 input_set_drvdata(input_dev, usbtouch); 1466 1467 input_dev->open = usbtouch_open; 1468 input_dev->close = usbtouch_close; 1469 1470 input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS); 1471 input_dev->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH); 1472 input_set_abs_params(input_dev, ABS_X, type->min_xc, type->max_xc, 0, 0); 1473 input_set_abs_params(input_dev, ABS_Y, type->min_yc, type->max_yc, 0, 0); 1474 if (type->max_press) 1475 input_set_abs_params(input_dev, ABS_PRESSURE, type->min_press, 1476 type->max_press, 0, 0); 1477 1478 if (usb_endpoint_type(endpoint) == USB_ENDPOINT_XFER_INT) 1479 usb_fill_int_urb(usbtouch->irq, udev, 1480 usb_rcvintpipe(udev, endpoint->bEndpointAddress), 1481 usbtouch->data, type->rept_size, 1482 usbtouch_irq, usbtouch, endpoint->bInterval); 1483 else 1484 usb_fill_bulk_urb(usbtouch->irq, udev, 1485 usb_rcvbulkpipe(udev, endpoint->bEndpointAddress), 1486 usbtouch->data, type->rept_size, 1487 usbtouch_irq, usbtouch); 1488 1489 usbtouch->irq->dev = udev; 1490 usbtouch->irq->transfer_dma = usbtouch->data_dma; 1491 usbtouch->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; 1492 1493 /* device specific allocations */ 1494 if (type->alloc) { 1495 err = type->alloc(usbtouch); 1496 if (err) { 1497 dbg("%s - type->alloc() failed, err: %d", __func__, err); 1498 goto out_free_urb; 1499 } 1500 } 1501 1502 /* device specific initialisation*/ 1503 if (type->init) { 1504 err = type->init(usbtouch); 1505 if (err) { 1506 dbg("%s - type->init() failed, err: %d", __func__, err); 1507 goto out_do_exit; 1508 } 1509 } 1510 1511 err = input_register_device(usbtouch->input); 1512 if (err) { 1513 dbg("%s - input_register_device failed, err: %d", __func__, err); 1514 goto out_do_exit; 1515 } 1516 1517 usb_set_intfdata(intf, usbtouch); 1518 1519 if (usbtouch->type->irq_always) { 1520 /* this can't fail */ 1521 usb_autopm_get_interface(intf); 1522 err = usb_submit_urb(usbtouch->irq, GFP_KERNEL); 1523 if (err) { 1524 usb_autopm_put_interface(intf); 1525 err("%s - usb_submit_urb failed with result: %d", 1526 __func__, err); 1527 goto out_unregister_input; 1528 } 1529 } 1530 1531 return 0; 1532 1533 out_unregister_input: 1534 input_unregister_device(input_dev); 1535 input_dev = NULL; 1536 out_do_exit: 1537 if (type->exit) 1538 type->exit(usbtouch); 1539 out_free_urb: 1540 usb_free_urb(usbtouch->irq); 1541 out_free_buffers: 1542 usbtouch_free_buffers(udev, usbtouch); 1543 out_free: 1544 input_free_device(input_dev); 1545 kfree(usbtouch); 1546 return err; 1547 } 1548 1549 static void usbtouch_disconnect(struct usb_interface *intf) 1550 { 1551 struct usbtouch_usb *usbtouch = usb_get_intfdata(intf); 1552 1553 dbg("%s - called", __func__); 1554 1555 if (!usbtouch) 1556 return; 1557 1558 dbg("%s - usbtouch is initialized, cleaning up", __func__); 1559 usb_set_intfdata(intf, NULL); 1560 /* this will stop IO via close */ 1561 input_unregister_device(usbtouch->input); 1562 usb_free_urb(usbtouch->irq); 1563 if (usbtouch->type->exit) 1564 usbtouch->type->exit(usbtouch); 1565 usbtouch_free_buffers(interface_to_usbdev(intf), usbtouch); 1566 kfree(usbtouch); 1567 } 1568 1569 MODULE_DEVICE_TABLE(usb, usbtouch_devices); 1570 1571 static struct usb_driver usbtouch_driver = { 1572 .name = "usbtouchscreen", 1573 .probe = usbtouch_probe, 1574 .disconnect = usbtouch_disconnect, 1575 .suspend = usbtouch_suspend, 1576 .resume = usbtouch_resume, 1577 .reset_resume = usbtouch_reset_resume, 1578 .id_table = usbtouch_devices, 1579 .supports_autosuspend = 1, 1580 }; 1581 1582 static int __init usbtouch_init(void) 1583 { 1584 return usb_register(&usbtouch_driver); 1585 } 1586 1587 static void __exit usbtouch_cleanup(void) 1588 { 1589 usb_deregister(&usbtouch_driver); 1590 } 1591 1592 module_init(usbtouch_init); 1593 module_exit(usbtouch_cleanup); 1594 1595 MODULE_AUTHOR(DRIVER_AUTHOR); 1596 MODULE_DESCRIPTION(DRIVER_DESC); 1597 MODULE_LICENSE("GPL"); 1598 1599 MODULE_ALIAS("touchkitusb"); 1600 MODULE_ALIAS("itmtouch"); 1601 MODULE_ALIAS("mtouchusb"); 1602