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