1 /* 2 * USB HID support for Linux 3 * 4 * Copyright (c) 1999 Andreas Gal 5 * Copyright (c) 2000-2005 Vojtech Pavlik <vojtech@suse.cz> 6 * Copyright (c) 2005 Michael Haboustak <mike-@cinci.rr.com> for Concept2, Inc 7 * Copyright (c) 2007-2008 Oliver Neukum 8 * Copyright (c) 2006-2010 Jiri Kosina 9 */ 10 11 /* 12 * This program is free software; you can redistribute it and/or modify it 13 * under the terms of the GNU General Public License as published by the Free 14 * Software Foundation; either version 2 of the License, or (at your option) 15 * any later version. 16 */ 17 18 #include <linux/module.h> 19 #include <linux/slab.h> 20 #include <linux/init.h> 21 #include <linux/kernel.h> 22 #include <linux/list.h> 23 #include <linux/mm.h> 24 #include <linux/mutex.h> 25 #include <linux/spinlock.h> 26 #include <asm/unaligned.h> 27 #include <asm/byteorder.h> 28 #include <linux/input.h> 29 #include <linux/wait.h> 30 #include <linux/workqueue.h> 31 32 #include <linux/usb.h> 33 34 #include <linux/hid.h> 35 #include <linux/hiddev.h> 36 #include <linux/hid-debug.h> 37 #include <linux/hidraw.h> 38 #include "usbhid.h" 39 40 /* 41 * Version Information 42 */ 43 44 #define DRIVER_DESC "USB HID core driver" 45 #define DRIVER_LICENSE "GPL" 46 47 /* 48 * Module parameters. 49 */ 50 51 static unsigned int hid_mousepoll_interval; 52 module_param_named(mousepoll, hid_mousepoll_interval, uint, 0644); 53 MODULE_PARM_DESC(mousepoll, "Polling interval of mice"); 54 55 static unsigned int ignoreled; 56 module_param_named(ignoreled, ignoreled, uint, 0644); 57 MODULE_PARM_DESC(ignoreled, "Autosuspend with active leds"); 58 59 /* Quirks specified at module load time */ 60 static char *quirks_param[MAX_USBHID_BOOT_QUIRKS] = { [ 0 ... (MAX_USBHID_BOOT_QUIRKS - 1) ] = NULL }; 61 module_param_array_named(quirks, quirks_param, charp, NULL, 0444); 62 MODULE_PARM_DESC(quirks, "Add/modify USB HID quirks by specifying " 63 " quirks=vendorID:productID:quirks" 64 " where vendorID, productID, and quirks are all in" 65 " 0x-prefixed hex"); 66 /* 67 * Input submission and I/O error handler. 68 */ 69 static DEFINE_MUTEX(hid_open_mut); 70 static struct workqueue_struct *resumption_waker; 71 72 static void hid_io_error(struct hid_device *hid); 73 static int hid_submit_out(struct hid_device *hid); 74 static int hid_submit_ctrl(struct hid_device *hid); 75 static void hid_cancel_delayed_stuff(struct usbhid_device *usbhid); 76 77 /* Start up the input URB */ 78 static int hid_start_in(struct hid_device *hid) 79 { 80 unsigned long flags; 81 int rc = 0; 82 struct usbhid_device *usbhid = hid->driver_data; 83 84 spin_lock_irqsave(&usbhid->lock, flags); 85 if (hid->open > 0 && 86 !test_bit(HID_DISCONNECTED, &usbhid->iofl) && 87 !test_bit(HID_REPORTED_IDLE, &usbhid->iofl) && 88 !test_and_set_bit(HID_IN_RUNNING, &usbhid->iofl)) { 89 rc = usb_submit_urb(usbhid->urbin, GFP_ATOMIC); 90 if (rc != 0) 91 clear_bit(HID_IN_RUNNING, &usbhid->iofl); 92 } 93 spin_unlock_irqrestore(&usbhid->lock, flags); 94 return rc; 95 } 96 97 /* I/O retry timer routine */ 98 static void hid_retry_timeout(unsigned long _hid) 99 { 100 struct hid_device *hid = (struct hid_device *) _hid; 101 struct usbhid_device *usbhid = hid->driver_data; 102 103 dev_dbg(&usbhid->intf->dev, "retrying intr urb\n"); 104 if (hid_start_in(hid)) 105 hid_io_error(hid); 106 } 107 108 /* Workqueue routine to reset the device or clear a halt */ 109 static void hid_reset(struct work_struct *work) 110 { 111 struct usbhid_device *usbhid = 112 container_of(work, struct usbhid_device, reset_work); 113 struct hid_device *hid = usbhid->hid; 114 int rc = 0; 115 116 if (test_bit(HID_CLEAR_HALT, &usbhid->iofl)) { 117 dev_dbg(&usbhid->intf->dev, "clear halt\n"); 118 rc = usb_clear_halt(hid_to_usb_dev(hid), usbhid->urbin->pipe); 119 clear_bit(HID_CLEAR_HALT, &usbhid->iofl); 120 hid_start_in(hid); 121 } 122 123 else if (test_bit(HID_RESET_PENDING, &usbhid->iofl)) { 124 dev_dbg(&usbhid->intf->dev, "resetting device\n"); 125 rc = usb_lock_device_for_reset(hid_to_usb_dev(hid), usbhid->intf); 126 if (rc == 0) { 127 rc = usb_reset_device(hid_to_usb_dev(hid)); 128 usb_unlock_device(hid_to_usb_dev(hid)); 129 } 130 clear_bit(HID_RESET_PENDING, &usbhid->iofl); 131 } 132 133 switch (rc) { 134 case 0: 135 if (!test_bit(HID_IN_RUNNING, &usbhid->iofl)) 136 hid_io_error(hid); 137 break; 138 default: 139 err_hid("can't reset device, %s-%s/input%d, status %d", 140 hid_to_usb_dev(hid)->bus->bus_name, 141 hid_to_usb_dev(hid)->devpath, 142 usbhid->ifnum, rc); 143 /* FALLTHROUGH */ 144 case -EHOSTUNREACH: 145 case -ENODEV: 146 case -EINTR: 147 break; 148 } 149 } 150 151 /* Main I/O error handler */ 152 static void hid_io_error(struct hid_device *hid) 153 { 154 unsigned long flags; 155 struct usbhid_device *usbhid = hid->driver_data; 156 157 spin_lock_irqsave(&usbhid->lock, flags); 158 159 /* Stop when disconnected */ 160 if (test_bit(HID_DISCONNECTED, &usbhid->iofl)) 161 goto done; 162 163 /* If it has been a while since the last error, we'll assume 164 * this a brand new error and reset the retry timeout. */ 165 if (time_after(jiffies, usbhid->stop_retry + HZ/2)) 166 usbhid->retry_delay = 0; 167 168 /* When an error occurs, retry at increasing intervals */ 169 if (usbhid->retry_delay == 0) { 170 usbhid->retry_delay = 13; /* Then 26, 52, 104, 104, ... */ 171 usbhid->stop_retry = jiffies + msecs_to_jiffies(1000); 172 } else if (usbhid->retry_delay < 100) 173 usbhid->retry_delay *= 2; 174 175 if (time_after(jiffies, usbhid->stop_retry)) { 176 177 /* Retries failed, so do a port reset */ 178 if (!test_and_set_bit(HID_RESET_PENDING, &usbhid->iofl)) { 179 schedule_work(&usbhid->reset_work); 180 goto done; 181 } 182 } 183 184 mod_timer(&usbhid->io_retry, 185 jiffies + msecs_to_jiffies(usbhid->retry_delay)); 186 done: 187 spin_unlock_irqrestore(&usbhid->lock, flags); 188 } 189 190 static void usbhid_mark_busy(struct usbhid_device *usbhid) 191 { 192 struct usb_interface *intf = usbhid->intf; 193 194 usb_mark_last_busy(interface_to_usbdev(intf)); 195 } 196 197 static int usbhid_restart_out_queue(struct usbhid_device *usbhid) 198 { 199 struct hid_device *hid = usb_get_intfdata(usbhid->intf); 200 int kicked; 201 202 if (!hid) 203 return 0; 204 205 if ((kicked = (usbhid->outhead != usbhid->outtail))) { 206 dbg("Kicking head %d tail %d", usbhid->outhead, usbhid->outtail); 207 if (hid_submit_out(hid)) { 208 clear_bit(HID_OUT_RUNNING, &usbhid->iofl); 209 wake_up(&usbhid->wait); 210 } 211 } 212 return kicked; 213 } 214 215 static int usbhid_restart_ctrl_queue(struct usbhid_device *usbhid) 216 { 217 struct hid_device *hid = usb_get_intfdata(usbhid->intf); 218 int kicked; 219 220 WARN_ON(hid == NULL); 221 if (!hid) 222 return 0; 223 224 if ((kicked = (usbhid->ctrlhead != usbhid->ctrltail))) { 225 dbg("Kicking head %d tail %d", usbhid->ctrlhead, usbhid->ctrltail); 226 if (hid_submit_ctrl(hid)) { 227 clear_bit(HID_CTRL_RUNNING, &usbhid->iofl); 228 wake_up(&usbhid->wait); 229 } 230 } 231 return kicked; 232 } 233 234 /* 235 * Input interrupt completion handler. 236 */ 237 238 static void hid_irq_in(struct urb *urb) 239 { 240 struct hid_device *hid = urb->context; 241 struct usbhid_device *usbhid = hid->driver_data; 242 int status; 243 244 switch (urb->status) { 245 case 0: /* success */ 246 usbhid_mark_busy(usbhid); 247 usbhid->retry_delay = 0; 248 hid_input_report(urb->context, HID_INPUT_REPORT, 249 urb->transfer_buffer, 250 urb->actual_length, 1); 251 /* 252 * autosuspend refused while keys are pressed 253 * because most keyboards don't wake up when 254 * a key is released 255 */ 256 if (hid_check_keys_pressed(hid)) 257 set_bit(HID_KEYS_PRESSED, &usbhid->iofl); 258 else 259 clear_bit(HID_KEYS_PRESSED, &usbhid->iofl); 260 break; 261 case -EPIPE: /* stall */ 262 usbhid_mark_busy(usbhid); 263 clear_bit(HID_IN_RUNNING, &usbhid->iofl); 264 set_bit(HID_CLEAR_HALT, &usbhid->iofl); 265 schedule_work(&usbhid->reset_work); 266 return; 267 case -ECONNRESET: /* unlink */ 268 case -ENOENT: 269 case -ESHUTDOWN: /* unplug */ 270 clear_bit(HID_IN_RUNNING, &usbhid->iofl); 271 return; 272 case -EILSEQ: /* protocol error or unplug */ 273 case -EPROTO: /* protocol error or unplug */ 274 case -ETIME: /* protocol error or unplug */ 275 case -ETIMEDOUT: /* Should never happen, but... */ 276 usbhid_mark_busy(usbhid); 277 clear_bit(HID_IN_RUNNING, &usbhid->iofl); 278 hid_io_error(hid); 279 return; 280 default: /* error */ 281 dev_warn(&urb->dev->dev, "input irq status %d " 282 "received\n", urb->status); 283 } 284 285 status = usb_submit_urb(urb, GFP_ATOMIC); 286 if (status) { 287 clear_bit(HID_IN_RUNNING, &usbhid->iofl); 288 if (status != -EPERM) { 289 err_hid("can't resubmit intr, %s-%s/input%d, status %d", 290 hid_to_usb_dev(hid)->bus->bus_name, 291 hid_to_usb_dev(hid)->devpath, 292 usbhid->ifnum, status); 293 hid_io_error(hid); 294 } 295 } 296 } 297 298 static int hid_submit_out(struct hid_device *hid) 299 { 300 struct hid_report *report; 301 char *raw_report; 302 struct usbhid_device *usbhid = hid->driver_data; 303 304 report = usbhid->out[usbhid->outtail].report; 305 raw_report = usbhid->out[usbhid->outtail].raw_report; 306 307 if (!test_bit(HID_REPORTED_IDLE, &usbhid->iofl)) { 308 usbhid->urbout->transfer_buffer_length = ((report->size - 1) >> 3) + 1 + (report->id > 0); 309 usbhid->urbout->dev = hid_to_usb_dev(hid); 310 memcpy(usbhid->outbuf, raw_report, usbhid->urbout->transfer_buffer_length); 311 kfree(raw_report); 312 313 dbg_hid("submitting out urb\n"); 314 315 if (usb_submit_urb(usbhid->urbout, GFP_ATOMIC)) { 316 err_hid("usb_submit_urb(out) failed"); 317 return -1; 318 } 319 usbhid->last_out = jiffies; 320 } else { 321 /* 322 * queue work to wake up the device. 323 * as the work queue is freezeable, this is safe 324 * with respect to STD and STR 325 */ 326 queue_work(resumption_waker, &usbhid->restart_work); 327 } 328 329 return 0; 330 } 331 332 static int hid_submit_ctrl(struct hid_device *hid) 333 { 334 struct hid_report *report; 335 unsigned char dir; 336 char *raw_report; 337 int len; 338 struct usbhid_device *usbhid = hid->driver_data; 339 340 report = usbhid->ctrl[usbhid->ctrltail].report; 341 raw_report = usbhid->ctrl[usbhid->ctrltail].raw_report; 342 dir = usbhid->ctrl[usbhid->ctrltail].dir; 343 344 if (!test_bit(HID_REPORTED_IDLE, &usbhid->iofl)) { 345 len = ((report->size - 1) >> 3) + 1 + (report->id > 0); 346 if (dir == USB_DIR_OUT) { 347 usbhid->urbctrl->pipe = usb_sndctrlpipe(hid_to_usb_dev(hid), 0); 348 usbhid->urbctrl->transfer_buffer_length = len; 349 memcpy(usbhid->ctrlbuf, raw_report, len); 350 kfree(raw_report); 351 } else { 352 int maxpacket, padlen; 353 354 usbhid->urbctrl->pipe = usb_rcvctrlpipe(hid_to_usb_dev(hid), 0); 355 maxpacket = usb_maxpacket(hid_to_usb_dev(hid), usbhid->urbctrl->pipe, 0); 356 if (maxpacket > 0) { 357 padlen = DIV_ROUND_UP(len, maxpacket); 358 padlen *= maxpacket; 359 if (padlen > usbhid->bufsize) 360 padlen = usbhid->bufsize; 361 } else 362 padlen = 0; 363 usbhid->urbctrl->transfer_buffer_length = padlen; 364 } 365 usbhid->urbctrl->dev = hid_to_usb_dev(hid); 366 367 usbhid->cr->bRequestType = USB_TYPE_CLASS | USB_RECIP_INTERFACE | dir; 368 usbhid->cr->bRequest = (dir == USB_DIR_OUT) ? HID_REQ_SET_REPORT : HID_REQ_GET_REPORT; 369 usbhid->cr->wValue = cpu_to_le16(((report->type + 1) << 8) | report->id); 370 usbhid->cr->wIndex = cpu_to_le16(usbhid->ifnum); 371 usbhid->cr->wLength = cpu_to_le16(len); 372 373 dbg_hid("submitting ctrl urb: %s wValue=0x%04x wIndex=0x%04x wLength=%u\n", 374 usbhid->cr->bRequest == HID_REQ_SET_REPORT ? "Set_Report" : "Get_Report", 375 usbhid->cr->wValue, usbhid->cr->wIndex, usbhid->cr->wLength); 376 377 if (usb_submit_urb(usbhid->urbctrl, GFP_ATOMIC)) { 378 err_hid("usb_submit_urb(ctrl) failed"); 379 return -1; 380 } 381 usbhid->last_ctrl = jiffies; 382 } else { 383 /* 384 * queue work to wake up the device. 385 * as the work queue is freezeable, this is safe 386 * with respect to STD and STR 387 */ 388 queue_work(resumption_waker, &usbhid->restart_work); 389 } 390 391 return 0; 392 } 393 394 /* 395 * Output interrupt completion handler. 396 */ 397 398 static void hid_irq_out(struct urb *urb) 399 { 400 struct hid_device *hid = urb->context; 401 struct usbhid_device *usbhid = hid->driver_data; 402 unsigned long flags; 403 int unplug = 0; 404 405 switch (urb->status) { 406 case 0: /* success */ 407 break; 408 case -ESHUTDOWN: /* unplug */ 409 unplug = 1; 410 case -EILSEQ: /* protocol error or unplug */ 411 case -EPROTO: /* protocol error or unplug */ 412 case -ECONNRESET: /* unlink */ 413 case -ENOENT: 414 break; 415 default: /* error */ 416 dev_warn(&urb->dev->dev, "output irq status %d " 417 "received\n", urb->status); 418 } 419 420 spin_lock_irqsave(&usbhid->lock, flags); 421 422 if (unplug) 423 usbhid->outtail = usbhid->outhead; 424 else 425 usbhid->outtail = (usbhid->outtail + 1) & (HID_OUTPUT_FIFO_SIZE - 1); 426 427 if (usbhid->outhead != usbhid->outtail) { 428 if (hid_submit_out(hid)) { 429 clear_bit(HID_OUT_RUNNING, &usbhid->iofl); 430 wake_up(&usbhid->wait); 431 } 432 spin_unlock_irqrestore(&usbhid->lock, flags); 433 return; 434 } 435 436 clear_bit(HID_OUT_RUNNING, &usbhid->iofl); 437 spin_unlock_irqrestore(&usbhid->lock, flags); 438 wake_up(&usbhid->wait); 439 } 440 441 /* 442 * Control pipe completion handler. 443 */ 444 445 static void hid_ctrl(struct urb *urb) 446 { 447 struct hid_device *hid = urb->context; 448 struct usbhid_device *usbhid = hid->driver_data; 449 int unplug = 0, status = urb->status; 450 451 spin_lock(&usbhid->lock); 452 453 switch (status) { 454 case 0: /* success */ 455 if (usbhid->ctrl[usbhid->ctrltail].dir == USB_DIR_IN) 456 hid_input_report(urb->context, 457 usbhid->ctrl[usbhid->ctrltail].report->type, 458 urb->transfer_buffer, urb->actual_length, 0); 459 break; 460 case -ESHUTDOWN: /* unplug */ 461 unplug = 1; 462 case -EILSEQ: /* protocol error or unplug */ 463 case -EPROTO: /* protocol error or unplug */ 464 case -ECONNRESET: /* unlink */ 465 case -ENOENT: 466 case -EPIPE: /* report not available */ 467 break; 468 default: /* error */ 469 dev_warn(&urb->dev->dev, "ctrl urb status %d " 470 "received\n", status); 471 } 472 473 if (unplug) 474 usbhid->ctrltail = usbhid->ctrlhead; 475 else 476 usbhid->ctrltail = (usbhid->ctrltail + 1) & (HID_CONTROL_FIFO_SIZE - 1); 477 478 if (usbhid->ctrlhead != usbhid->ctrltail) { 479 if (hid_submit_ctrl(hid)) { 480 clear_bit(HID_CTRL_RUNNING, &usbhid->iofl); 481 wake_up(&usbhid->wait); 482 } 483 spin_unlock(&usbhid->lock); 484 return; 485 } 486 487 clear_bit(HID_CTRL_RUNNING, &usbhid->iofl); 488 spin_unlock(&usbhid->lock); 489 wake_up(&usbhid->wait); 490 } 491 492 static void __usbhid_submit_report(struct hid_device *hid, struct hid_report *report, 493 unsigned char dir) 494 { 495 int head; 496 struct usbhid_device *usbhid = hid->driver_data; 497 int len = ((report->size - 1) >> 3) + 1 + (report->id > 0); 498 499 if ((hid->quirks & HID_QUIRK_NOGET) && dir == USB_DIR_IN) 500 return; 501 502 if (usbhid->urbout && dir == USB_DIR_OUT && report->type == HID_OUTPUT_REPORT) { 503 if ((head = (usbhid->outhead + 1) & (HID_OUTPUT_FIFO_SIZE - 1)) == usbhid->outtail) { 504 dev_warn(&hid->dev, "output queue full\n"); 505 return; 506 } 507 508 usbhid->out[usbhid->outhead].raw_report = kmalloc(len, GFP_ATOMIC); 509 if (!usbhid->out[usbhid->outhead].raw_report) { 510 dev_warn(&hid->dev, "output queueing failed\n"); 511 return; 512 } 513 hid_output_report(report, usbhid->out[usbhid->outhead].raw_report); 514 usbhid->out[usbhid->outhead].report = report; 515 usbhid->outhead = head; 516 517 if (!test_and_set_bit(HID_OUT_RUNNING, &usbhid->iofl)) { 518 if (hid_submit_out(hid)) 519 clear_bit(HID_OUT_RUNNING, &usbhid->iofl); 520 } else { 521 /* 522 * the queue is known to run 523 * but an earlier request may be stuck 524 * we may need to time out 525 * no race because this is called under 526 * spinlock 527 */ 528 if (time_after(jiffies, usbhid->last_out + HZ * 5)) 529 usb_unlink_urb(usbhid->urbout); 530 } 531 return; 532 } 533 534 if ((head = (usbhid->ctrlhead + 1) & (HID_CONTROL_FIFO_SIZE - 1)) == usbhid->ctrltail) { 535 dev_warn(&hid->dev, "control queue full\n"); 536 return; 537 } 538 539 if (dir == USB_DIR_OUT) { 540 usbhid->ctrl[usbhid->ctrlhead].raw_report = kmalloc(len, GFP_ATOMIC); 541 if (!usbhid->ctrl[usbhid->ctrlhead].raw_report) { 542 dev_warn(&hid->dev, "control queueing failed\n"); 543 return; 544 } 545 hid_output_report(report, usbhid->ctrl[usbhid->ctrlhead].raw_report); 546 } 547 usbhid->ctrl[usbhid->ctrlhead].report = report; 548 usbhid->ctrl[usbhid->ctrlhead].dir = dir; 549 usbhid->ctrlhead = head; 550 551 if (!test_and_set_bit(HID_CTRL_RUNNING, &usbhid->iofl)) { 552 if (hid_submit_ctrl(hid)) 553 clear_bit(HID_CTRL_RUNNING, &usbhid->iofl); 554 } else { 555 /* 556 * the queue is known to run 557 * but an earlier request may be stuck 558 * we may need to time out 559 * no race because this is called under 560 * spinlock 561 */ 562 if (time_after(jiffies, usbhid->last_ctrl + HZ * 5)) 563 usb_unlink_urb(usbhid->urbctrl); 564 } 565 } 566 567 void usbhid_submit_report(struct hid_device *hid, struct hid_report *report, unsigned char dir) 568 { 569 struct usbhid_device *usbhid = hid->driver_data; 570 unsigned long flags; 571 572 spin_lock_irqsave(&usbhid->lock, flags); 573 __usbhid_submit_report(hid, report, dir); 574 spin_unlock_irqrestore(&usbhid->lock, flags); 575 } 576 EXPORT_SYMBOL_GPL(usbhid_submit_report); 577 578 static int usb_hidinput_input_event(struct input_dev *dev, unsigned int type, unsigned int code, int value) 579 { 580 struct hid_device *hid = input_get_drvdata(dev); 581 struct usbhid_device *usbhid = hid->driver_data; 582 struct hid_field *field; 583 unsigned long flags; 584 int offset; 585 586 if (type == EV_FF) 587 return input_ff_event(dev, type, code, value); 588 589 if (type != EV_LED) 590 return -1; 591 592 if ((offset = hidinput_find_field(hid, type, code, &field)) == -1) { 593 dev_warn(&dev->dev, "event field not found\n"); 594 return -1; 595 } 596 597 hid_set_field(field, offset, value); 598 if (value) { 599 spin_lock_irqsave(&usbhid->lock, flags); 600 usbhid->ledcount++; 601 spin_unlock_irqrestore(&usbhid->lock, flags); 602 } else { 603 spin_lock_irqsave(&usbhid->lock, flags); 604 usbhid->ledcount--; 605 spin_unlock_irqrestore(&usbhid->lock, flags); 606 } 607 usbhid_submit_report(hid, field->report, USB_DIR_OUT); 608 609 return 0; 610 } 611 612 int usbhid_wait_io(struct hid_device *hid) 613 { 614 struct usbhid_device *usbhid = hid->driver_data; 615 616 if (!wait_event_timeout(usbhid->wait, 617 (!test_bit(HID_CTRL_RUNNING, &usbhid->iofl) && 618 !test_bit(HID_OUT_RUNNING, &usbhid->iofl)), 619 10*HZ)) { 620 dbg_hid("timeout waiting for ctrl or out queue to clear\n"); 621 return -1; 622 } 623 624 return 0; 625 } 626 627 static int hid_set_idle(struct usb_device *dev, int ifnum, int report, int idle) 628 { 629 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), 630 HID_REQ_SET_IDLE, USB_TYPE_CLASS | USB_RECIP_INTERFACE, (idle << 8) | report, 631 ifnum, NULL, 0, USB_CTRL_SET_TIMEOUT); 632 } 633 634 static int hid_get_class_descriptor(struct usb_device *dev, int ifnum, 635 unsigned char type, void *buf, int size) 636 { 637 int result, retries = 4; 638 639 memset(buf, 0, size); 640 641 do { 642 result = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), 643 USB_REQ_GET_DESCRIPTOR, USB_RECIP_INTERFACE | USB_DIR_IN, 644 (type << 8), ifnum, buf, size, USB_CTRL_GET_TIMEOUT); 645 retries--; 646 } while (result < size && retries); 647 return result; 648 } 649 650 int usbhid_open(struct hid_device *hid) 651 { 652 struct usbhid_device *usbhid = hid->driver_data; 653 int res; 654 655 mutex_lock(&hid_open_mut); 656 if (!hid->open++) { 657 res = usb_autopm_get_interface(usbhid->intf); 658 /* the device must be awake to reliable request remote wakeup */ 659 if (res < 0) { 660 hid->open--; 661 mutex_unlock(&hid_open_mut); 662 return -EIO; 663 } 664 usbhid->intf->needs_remote_wakeup = 1; 665 if (hid_start_in(hid)) 666 hid_io_error(hid); 667 668 usb_autopm_put_interface(usbhid->intf); 669 } 670 mutex_unlock(&hid_open_mut); 671 return 0; 672 } 673 674 void usbhid_close(struct hid_device *hid) 675 { 676 struct usbhid_device *usbhid = hid->driver_data; 677 678 mutex_lock(&hid_open_mut); 679 680 /* protecting hid->open to make sure we don't restart 681 * data acquistion due to a resumption we no longer 682 * care about 683 */ 684 spin_lock_irq(&usbhid->lock); 685 if (!--hid->open) { 686 spin_unlock_irq(&usbhid->lock); 687 hid_cancel_delayed_stuff(usbhid); 688 usb_kill_urb(usbhid->urbin); 689 usbhid->intf->needs_remote_wakeup = 0; 690 } else { 691 spin_unlock_irq(&usbhid->lock); 692 } 693 mutex_unlock(&hid_open_mut); 694 } 695 696 /* 697 * Initialize all reports 698 */ 699 700 void usbhid_init_reports(struct hid_device *hid) 701 { 702 struct hid_report *report; 703 struct usbhid_device *usbhid = hid->driver_data; 704 int err, ret; 705 706 list_for_each_entry(report, &hid->report_enum[HID_INPUT_REPORT].report_list, list) 707 usbhid_submit_report(hid, report, USB_DIR_IN); 708 709 list_for_each_entry(report, &hid->report_enum[HID_FEATURE_REPORT].report_list, list) 710 usbhid_submit_report(hid, report, USB_DIR_IN); 711 712 err = 0; 713 ret = usbhid_wait_io(hid); 714 while (ret) { 715 err |= ret; 716 if (test_bit(HID_CTRL_RUNNING, &usbhid->iofl)) 717 usb_kill_urb(usbhid->urbctrl); 718 if (test_bit(HID_OUT_RUNNING, &usbhid->iofl)) 719 usb_kill_urb(usbhid->urbout); 720 ret = usbhid_wait_io(hid); 721 } 722 723 if (err) 724 dev_warn(&hid->dev, "timeout initializing reports\n"); 725 } 726 727 /* 728 * Reset LEDs which BIOS might have left on. For now, just NumLock (0x01). 729 */ 730 static int hid_find_field_early(struct hid_device *hid, unsigned int page, 731 unsigned int hid_code, struct hid_field **pfield) 732 { 733 struct hid_report *report; 734 struct hid_field *field; 735 struct hid_usage *usage; 736 int i, j; 737 738 list_for_each_entry(report, &hid->report_enum[HID_OUTPUT_REPORT].report_list, list) { 739 for (i = 0; i < report->maxfield; i++) { 740 field = report->field[i]; 741 for (j = 0; j < field->maxusage; j++) { 742 usage = &field->usage[j]; 743 if ((usage->hid & HID_USAGE_PAGE) == page && 744 (usage->hid & 0xFFFF) == hid_code) { 745 *pfield = field; 746 return j; 747 } 748 } 749 } 750 } 751 return -1; 752 } 753 754 void usbhid_set_leds(struct hid_device *hid) 755 { 756 struct hid_field *field; 757 int offset; 758 759 if ((offset = hid_find_field_early(hid, HID_UP_LED, 0x01, &field)) != -1) { 760 hid_set_field(field, offset, 0); 761 usbhid_submit_report(hid, field->report, USB_DIR_OUT); 762 } 763 } 764 EXPORT_SYMBOL_GPL(usbhid_set_leds); 765 766 /* 767 * Traverse the supplied list of reports and find the longest 768 */ 769 static void hid_find_max_report(struct hid_device *hid, unsigned int type, 770 unsigned int *max) 771 { 772 struct hid_report *report; 773 unsigned int size; 774 775 list_for_each_entry(report, &hid->report_enum[type].report_list, list) { 776 size = ((report->size - 1) >> 3) + 1 + hid->report_enum[type].numbered; 777 if (*max < size) 778 *max = size; 779 } 780 } 781 782 static int hid_alloc_buffers(struct usb_device *dev, struct hid_device *hid) 783 { 784 struct usbhid_device *usbhid = hid->driver_data; 785 786 usbhid->inbuf = usb_buffer_alloc(dev, usbhid->bufsize, GFP_KERNEL, 787 &usbhid->inbuf_dma); 788 usbhid->outbuf = usb_buffer_alloc(dev, usbhid->bufsize, GFP_KERNEL, 789 &usbhid->outbuf_dma); 790 usbhid->cr = usb_buffer_alloc(dev, sizeof(*usbhid->cr), GFP_KERNEL, 791 &usbhid->cr_dma); 792 usbhid->ctrlbuf = usb_buffer_alloc(dev, usbhid->bufsize, GFP_KERNEL, 793 &usbhid->ctrlbuf_dma); 794 if (!usbhid->inbuf || !usbhid->outbuf || !usbhid->cr || 795 !usbhid->ctrlbuf) 796 return -1; 797 798 return 0; 799 } 800 801 static int usbhid_output_raw_report(struct hid_device *hid, __u8 *buf, size_t count, 802 unsigned char report_type) 803 { 804 struct usbhid_device *usbhid = hid->driver_data; 805 struct usb_device *dev = hid_to_usb_dev(hid); 806 struct usb_interface *intf = usbhid->intf; 807 struct usb_host_interface *interface = intf->cur_altsetting; 808 int ret; 809 810 ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), 811 HID_REQ_SET_REPORT, 812 USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE, 813 ((report_type + 1) << 8) | *buf, 814 interface->desc.bInterfaceNumber, buf + 1, count - 1, 815 USB_CTRL_SET_TIMEOUT); 816 817 /* count also the report id */ 818 if (ret > 0) 819 ret++; 820 821 return ret; 822 } 823 824 static void usbhid_restart_queues(struct usbhid_device *usbhid) 825 { 826 if (usbhid->urbout) 827 usbhid_restart_out_queue(usbhid); 828 usbhid_restart_ctrl_queue(usbhid); 829 } 830 831 static void __usbhid_restart_queues(struct work_struct *work) 832 { 833 struct usbhid_device *usbhid = 834 container_of(work, struct usbhid_device, restart_work); 835 int r; 836 837 r = usb_autopm_get_interface(usbhid->intf); 838 if (r < 0) 839 return; 840 usb_autopm_put_interface(usbhid->intf); 841 } 842 843 static void hid_free_buffers(struct usb_device *dev, struct hid_device *hid) 844 { 845 struct usbhid_device *usbhid = hid->driver_data; 846 847 usb_buffer_free(dev, usbhid->bufsize, usbhid->inbuf, usbhid->inbuf_dma); 848 usb_buffer_free(dev, usbhid->bufsize, usbhid->outbuf, usbhid->outbuf_dma); 849 usb_buffer_free(dev, sizeof(*(usbhid->cr)), usbhid->cr, usbhid->cr_dma); 850 usb_buffer_free(dev, usbhid->bufsize, usbhid->ctrlbuf, usbhid->ctrlbuf_dma); 851 } 852 853 static int usbhid_parse(struct hid_device *hid) 854 { 855 struct usb_interface *intf = to_usb_interface(hid->dev.parent); 856 struct usb_host_interface *interface = intf->cur_altsetting; 857 struct usb_device *dev = interface_to_usbdev (intf); 858 struct hid_descriptor *hdesc; 859 u32 quirks = 0; 860 unsigned int rsize = 0; 861 char *rdesc; 862 int ret, n; 863 864 quirks = usbhid_lookup_quirk(le16_to_cpu(dev->descriptor.idVendor), 865 le16_to_cpu(dev->descriptor.idProduct)); 866 867 if (quirks & HID_QUIRK_IGNORE) 868 return -ENODEV; 869 870 /* Many keyboards and mice don't like to be polled for reports, 871 * so we will always set the HID_QUIRK_NOGET flag for them. */ 872 if (interface->desc.bInterfaceSubClass == USB_INTERFACE_SUBCLASS_BOOT) { 873 if (interface->desc.bInterfaceProtocol == USB_INTERFACE_PROTOCOL_KEYBOARD || 874 interface->desc.bInterfaceProtocol == USB_INTERFACE_PROTOCOL_MOUSE) 875 quirks |= HID_QUIRK_NOGET; 876 } 877 878 if (usb_get_extra_descriptor(interface, HID_DT_HID, &hdesc) && 879 (!interface->desc.bNumEndpoints || 880 usb_get_extra_descriptor(&interface->endpoint[0], HID_DT_HID, &hdesc))) { 881 dbg_hid("class descriptor not present\n"); 882 return -ENODEV; 883 } 884 885 hid->version = le16_to_cpu(hdesc->bcdHID); 886 hid->country = hdesc->bCountryCode; 887 888 for (n = 0; n < hdesc->bNumDescriptors; n++) 889 if (hdesc->desc[n].bDescriptorType == HID_DT_REPORT) 890 rsize = le16_to_cpu(hdesc->desc[n].wDescriptorLength); 891 892 if (!rsize || rsize > HID_MAX_DESCRIPTOR_SIZE) { 893 dbg_hid("weird size of report descriptor (%u)\n", rsize); 894 return -EINVAL; 895 } 896 897 if (!(rdesc = kmalloc(rsize, GFP_KERNEL))) { 898 dbg_hid("couldn't allocate rdesc memory\n"); 899 return -ENOMEM; 900 } 901 902 hid_set_idle(dev, interface->desc.bInterfaceNumber, 0, 0); 903 904 ret = hid_get_class_descriptor(dev, interface->desc.bInterfaceNumber, 905 HID_DT_REPORT, rdesc, rsize); 906 if (ret < 0) { 907 dbg_hid("reading report descriptor failed\n"); 908 kfree(rdesc); 909 goto err; 910 } 911 912 ret = hid_parse_report(hid, rdesc, rsize); 913 kfree(rdesc); 914 if (ret) { 915 dbg_hid("parsing report descriptor failed\n"); 916 goto err; 917 } 918 919 hid->quirks |= quirks; 920 921 return 0; 922 err: 923 return ret; 924 } 925 926 static int usbhid_start(struct hid_device *hid) 927 { 928 struct usb_interface *intf = to_usb_interface(hid->dev.parent); 929 struct usb_host_interface *interface = intf->cur_altsetting; 930 struct usb_device *dev = interface_to_usbdev(intf); 931 struct usbhid_device *usbhid = hid->driver_data; 932 unsigned int n, insize = 0; 933 int ret; 934 935 clear_bit(HID_DISCONNECTED, &usbhid->iofl); 936 937 usbhid->bufsize = HID_MIN_BUFFER_SIZE; 938 hid_find_max_report(hid, HID_INPUT_REPORT, &usbhid->bufsize); 939 hid_find_max_report(hid, HID_OUTPUT_REPORT, &usbhid->bufsize); 940 hid_find_max_report(hid, HID_FEATURE_REPORT, &usbhid->bufsize); 941 942 if (usbhid->bufsize > HID_MAX_BUFFER_SIZE) 943 usbhid->bufsize = HID_MAX_BUFFER_SIZE; 944 945 hid_find_max_report(hid, HID_INPUT_REPORT, &insize); 946 947 if (insize > HID_MAX_BUFFER_SIZE) 948 insize = HID_MAX_BUFFER_SIZE; 949 950 if (hid_alloc_buffers(dev, hid)) { 951 ret = -ENOMEM; 952 goto fail; 953 } 954 955 for (n = 0; n < interface->desc.bNumEndpoints; n++) { 956 struct usb_endpoint_descriptor *endpoint; 957 int pipe; 958 int interval; 959 960 endpoint = &interface->endpoint[n].desc; 961 if (!usb_endpoint_xfer_int(endpoint)) 962 continue; 963 964 interval = endpoint->bInterval; 965 966 /* Some vendors give fullspeed interval on highspeed devides */ 967 if (hid->quirks & HID_QUIRK_FULLSPEED_INTERVAL && 968 dev->speed == USB_SPEED_HIGH) { 969 interval = fls(endpoint->bInterval*8); 970 printk(KERN_INFO "%s: Fixing fullspeed to highspeed interval: %d -> %d\n", 971 hid->name, endpoint->bInterval, interval); 972 } 973 974 /* Change the polling interval of mice. */ 975 if (hid->collection->usage == HID_GD_MOUSE && hid_mousepoll_interval > 0) 976 interval = hid_mousepoll_interval; 977 978 ret = -ENOMEM; 979 if (usb_endpoint_dir_in(endpoint)) { 980 if (usbhid->urbin) 981 continue; 982 if (!(usbhid->urbin = usb_alloc_urb(0, GFP_KERNEL))) 983 goto fail; 984 pipe = usb_rcvintpipe(dev, endpoint->bEndpointAddress); 985 usb_fill_int_urb(usbhid->urbin, dev, pipe, usbhid->inbuf, insize, 986 hid_irq_in, hid, interval); 987 usbhid->urbin->transfer_dma = usbhid->inbuf_dma; 988 usbhid->urbin->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; 989 } else { 990 if (usbhid->urbout) 991 continue; 992 if (!(usbhid->urbout = usb_alloc_urb(0, GFP_KERNEL))) 993 goto fail; 994 pipe = usb_sndintpipe(dev, endpoint->bEndpointAddress); 995 usb_fill_int_urb(usbhid->urbout, dev, pipe, usbhid->outbuf, 0, 996 hid_irq_out, hid, interval); 997 usbhid->urbout->transfer_dma = usbhid->outbuf_dma; 998 usbhid->urbout->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; 999 } 1000 } 1001 1002 init_waitqueue_head(&usbhid->wait); 1003 INIT_WORK(&usbhid->reset_work, hid_reset); 1004 INIT_WORK(&usbhid->restart_work, __usbhid_restart_queues); 1005 setup_timer(&usbhid->io_retry, hid_retry_timeout, (unsigned long) hid); 1006 1007 spin_lock_init(&usbhid->lock); 1008 1009 usbhid->urbctrl = usb_alloc_urb(0, GFP_KERNEL); 1010 if (!usbhid->urbctrl) { 1011 ret = -ENOMEM; 1012 goto fail; 1013 } 1014 1015 usb_fill_control_urb(usbhid->urbctrl, dev, 0, (void *) usbhid->cr, 1016 usbhid->ctrlbuf, 1, hid_ctrl, hid); 1017 usbhid->urbctrl->setup_dma = usbhid->cr_dma; 1018 usbhid->urbctrl->transfer_dma = usbhid->ctrlbuf_dma; 1019 usbhid->urbctrl->transfer_flags |= (URB_NO_TRANSFER_DMA_MAP | URB_NO_SETUP_DMA_MAP); 1020 1021 if (!(hid->quirks & HID_QUIRK_NO_INIT_REPORTS)) 1022 usbhid_init_reports(hid); 1023 1024 set_bit(HID_STARTED, &usbhid->iofl); 1025 1026 /* Some keyboards don't work until their LEDs have been set. 1027 * Since BIOSes do set the LEDs, it must be safe for any device 1028 * that supports the keyboard boot protocol. 1029 */ 1030 if (interface->desc.bInterfaceSubClass == USB_INTERFACE_SUBCLASS_BOOT && 1031 interface->desc.bInterfaceProtocol == 1032 USB_INTERFACE_PROTOCOL_KEYBOARD) 1033 usbhid_set_leds(hid); 1034 1035 return 0; 1036 1037 fail: 1038 usb_free_urb(usbhid->urbin); 1039 usb_free_urb(usbhid->urbout); 1040 usb_free_urb(usbhid->urbctrl); 1041 usbhid->urbin = NULL; 1042 usbhid->urbout = NULL; 1043 usbhid->urbctrl = NULL; 1044 hid_free_buffers(dev, hid); 1045 return ret; 1046 } 1047 1048 static void usbhid_stop(struct hid_device *hid) 1049 { 1050 struct usbhid_device *usbhid = hid->driver_data; 1051 1052 if (WARN_ON(!usbhid)) 1053 return; 1054 1055 clear_bit(HID_STARTED, &usbhid->iofl); 1056 spin_lock_irq(&usbhid->lock); /* Sync with error handler */ 1057 set_bit(HID_DISCONNECTED, &usbhid->iofl); 1058 spin_unlock_irq(&usbhid->lock); 1059 usb_kill_urb(usbhid->urbin); 1060 usb_kill_urb(usbhid->urbout); 1061 usb_kill_urb(usbhid->urbctrl); 1062 1063 hid_cancel_delayed_stuff(usbhid); 1064 1065 hid->claimed = 0; 1066 1067 usb_free_urb(usbhid->urbin); 1068 usb_free_urb(usbhid->urbctrl); 1069 usb_free_urb(usbhid->urbout); 1070 usbhid->urbin = NULL; /* don't mess up next start */ 1071 usbhid->urbctrl = NULL; 1072 usbhid->urbout = NULL; 1073 1074 hid_free_buffers(hid_to_usb_dev(hid), hid); 1075 } 1076 1077 static int usbhid_power(struct hid_device *hid, int lvl) 1078 { 1079 int r = 0; 1080 1081 switch (lvl) { 1082 case PM_HINT_FULLON: 1083 r = usbhid_get_power(hid); 1084 break; 1085 case PM_HINT_NORMAL: 1086 usbhid_put_power(hid); 1087 break; 1088 } 1089 return r; 1090 } 1091 1092 static struct hid_ll_driver usb_hid_driver = { 1093 .parse = usbhid_parse, 1094 .start = usbhid_start, 1095 .stop = usbhid_stop, 1096 .open = usbhid_open, 1097 .close = usbhid_close, 1098 .power = usbhid_power, 1099 .hidinput_input_event = usb_hidinput_input_event, 1100 }; 1101 1102 static int usbhid_probe(struct usb_interface *intf, const struct usb_device_id *id) 1103 { 1104 struct usb_host_interface *interface = intf->cur_altsetting; 1105 struct usb_device *dev = interface_to_usbdev(intf); 1106 struct usbhid_device *usbhid; 1107 struct hid_device *hid; 1108 unsigned int n, has_in = 0; 1109 size_t len; 1110 int ret; 1111 1112 dbg_hid("HID probe called for ifnum %d\n", 1113 intf->altsetting->desc.bInterfaceNumber); 1114 1115 for (n = 0; n < interface->desc.bNumEndpoints; n++) 1116 if (usb_endpoint_is_int_in(&interface->endpoint[n].desc)) 1117 has_in++; 1118 if (!has_in) { 1119 dev_err(&intf->dev, "couldn't find an input interrupt " 1120 "endpoint\n"); 1121 return -ENODEV; 1122 } 1123 1124 hid = hid_allocate_device(); 1125 if (IS_ERR(hid)) 1126 return PTR_ERR(hid); 1127 1128 usb_set_intfdata(intf, hid); 1129 hid->ll_driver = &usb_hid_driver; 1130 hid->hid_output_raw_report = usbhid_output_raw_report; 1131 hid->ff_init = hid_pidff_init; 1132 #ifdef CONFIG_USB_HIDDEV 1133 hid->hiddev_connect = hiddev_connect; 1134 hid->hiddev_disconnect = hiddev_disconnect; 1135 hid->hiddev_hid_event = hiddev_hid_event; 1136 hid->hiddev_report_event = hiddev_report_event; 1137 #endif 1138 hid->dev.parent = &intf->dev; 1139 hid->bus = BUS_USB; 1140 hid->vendor = le16_to_cpu(dev->descriptor.idVendor); 1141 hid->product = le16_to_cpu(dev->descriptor.idProduct); 1142 hid->name[0] = 0; 1143 if (intf->cur_altsetting->desc.bInterfaceProtocol == 1144 USB_INTERFACE_PROTOCOL_MOUSE) 1145 hid->type = HID_TYPE_USBMOUSE; 1146 1147 if (dev->manufacturer) 1148 strlcpy(hid->name, dev->manufacturer, sizeof(hid->name)); 1149 1150 if (dev->product) { 1151 if (dev->manufacturer) 1152 strlcat(hid->name, " ", sizeof(hid->name)); 1153 strlcat(hid->name, dev->product, sizeof(hid->name)); 1154 } 1155 1156 if (!strlen(hid->name)) 1157 snprintf(hid->name, sizeof(hid->name), "HID %04x:%04x", 1158 le16_to_cpu(dev->descriptor.idVendor), 1159 le16_to_cpu(dev->descriptor.idProduct)); 1160 1161 usb_make_path(dev, hid->phys, sizeof(hid->phys)); 1162 strlcat(hid->phys, "/input", sizeof(hid->phys)); 1163 len = strlen(hid->phys); 1164 if (len < sizeof(hid->phys) - 1) 1165 snprintf(hid->phys + len, sizeof(hid->phys) - len, 1166 "%d", intf->altsetting[0].desc.bInterfaceNumber); 1167 1168 if (usb_string(dev, dev->descriptor.iSerialNumber, hid->uniq, 64) <= 0) 1169 hid->uniq[0] = 0; 1170 1171 usbhid = kzalloc(sizeof(*usbhid), GFP_KERNEL); 1172 if (usbhid == NULL) { 1173 ret = -ENOMEM; 1174 goto err; 1175 } 1176 1177 hid->driver_data = usbhid; 1178 usbhid->hid = hid; 1179 usbhid->intf = intf; 1180 usbhid->ifnum = interface->desc.bInterfaceNumber; 1181 1182 ret = hid_add_device(hid); 1183 if (ret) { 1184 if (ret != -ENODEV) 1185 dev_err(&intf->dev, "can't add hid device: %d\n", ret); 1186 goto err_free; 1187 } 1188 1189 return 0; 1190 err_free: 1191 kfree(usbhid); 1192 err: 1193 hid_destroy_device(hid); 1194 return ret; 1195 } 1196 1197 static void usbhid_disconnect(struct usb_interface *intf) 1198 { 1199 struct hid_device *hid = usb_get_intfdata(intf); 1200 struct usbhid_device *usbhid; 1201 1202 if (WARN_ON(!hid)) 1203 return; 1204 1205 usbhid = hid->driver_data; 1206 hid_destroy_device(hid); 1207 kfree(usbhid); 1208 } 1209 1210 static void hid_cancel_delayed_stuff(struct usbhid_device *usbhid) 1211 { 1212 del_timer_sync(&usbhid->io_retry); 1213 cancel_work_sync(&usbhid->restart_work); 1214 cancel_work_sync(&usbhid->reset_work); 1215 } 1216 1217 static void hid_cease_io(struct usbhid_device *usbhid) 1218 { 1219 del_timer(&usbhid->io_retry); 1220 usb_kill_urb(usbhid->urbin); 1221 usb_kill_urb(usbhid->urbctrl); 1222 usb_kill_urb(usbhid->urbout); 1223 } 1224 1225 /* Treat USB reset pretty much the same as suspend/resume */ 1226 static int hid_pre_reset(struct usb_interface *intf) 1227 { 1228 struct hid_device *hid = usb_get_intfdata(intf); 1229 struct usbhid_device *usbhid = hid->driver_data; 1230 1231 spin_lock_irq(&usbhid->lock); 1232 set_bit(HID_RESET_PENDING, &usbhid->iofl); 1233 spin_unlock_irq(&usbhid->lock); 1234 cancel_work_sync(&usbhid->restart_work); 1235 hid_cease_io(usbhid); 1236 1237 return 0; 1238 } 1239 1240 /* Same routine used for post_reset and reset_resume */ 1241 static int hid_post_reset(struct usb_interface *intf) 1242 { 1243 struct usb_device *dev = interface_to_usbdev (intf); 1244 struct hid_device *hid = usb_get_intfdata(intf); 1245 struct usbhid_device *usbhid = hid->driver_data; 1246 int status; 1247 1248 spin_lock_irq(&usbhid->lock); 1249 clear_bit(HID_RESET_PENDING, &usbhid->iofl); 1250 spin_unlock_irq(&usbhid->lock); 1251 hid_set_idle(dev, intf->cur_altsetting->desc.bInterfaceNumber, 0, 0); 1252 status = hid_start_in(hid); 1253 if (status < 0) 1254 hid_io_error(hid); 1255 usbhid_restart_queues(usbhid); 1256 1257 return 0; 1258 } 1259 1260 int usbhid_get_power(struct hid_device *hid) 1261 { 1262 struct usbhid_device *usbhid = hid->driver_data; 1263 1264 return usb_autopm_get_interface(usbhid->intf); 1265 } 1266 1267 void usbhid_put_power(struct hid_device *hid) 1268 { 1269 struct usbhid_device *usbhid = hid->driver_data; 1270 1271 usb_autopm_put_interface(usbhid->intf); 1272 } 1273 1274 1275 #ifdef CONFIG_PM 1276 static int hid_suspend(struct usb_interface *intf, pm_message_t message) 1277 { 1278 struct hid_device *hid = usb_get_intfdata(intf); 1279 struct usbhid_device *usbhid = hid->driver_data; 1280 int status; 1281 1282 if (message.event & PM_EVENT_AUTO) { 1283 spin_lock_irq(&usbhid->lock); /* Sync with error handler */ 1284 if (!test_bit(HID_RESET_PENDING, &usbhid->iofl) 1285 && !test_bit(HID_CLEAR_HALT, &usbhid->iofl) 1286 && !test_bit(HID_OUT_RUNNING, &usbhid->iofl) 1287 && !test_bit(HID_CTRL_RUNNING, &usbhid->iofl) 1288 && !test_bit(HID_KEYS_PRESSED, &usbhid->iofl) 1289 && (!usbhid->ledcount || ignoreled)) 1290 { 1291 set_bit(HID_REPORTED_IDLE, &usbhid->iofl); 1292 spin_unlock_irq(&usbhid->lock); 1293 } else { 1294 usbhid_mark_busy(usbhid); 1295 spin_unlock_irq(&usbhid->lock); 1296 return -EBUSY; 1297 } 1298 1299 } else { 1300 spin_lock_irq(&usbhid->lock); 1301 set_bit(HID_REPORTED_IDLE, &usbhid->iofl); 1302 spin_unlock_irq(&usbhid->lock); 1303 if (usbhid_wait_io(hid) < 0) 1304 return -EIO; 1305 } 1306 1307 if (!ignoreled && (message.event & PM_EVENT_AUTO)) { 1308 spin_lock_irq(&usbhid->lock); 1309 if (test_bit(HID_LED_ON, &usbhid->iofl)) { 1310 spin_unlock_irq(&usbhid->lock); 1311 usbhid_mark_busy(usbhid); 1312 return -EBUSY; 1313 } 1314 spin_unlock_irq(&usbhid->lock); 1315 } 1316 1317 hid_cancel_delayed_stuff(usbhid); 1318 hid_cease_io(usbhid); 1319 1320 if ((message.event & PM_EVENT_AUTO) && 1321 test_bit(HID_KEYS_PRESSED, &usbhid->iofl)) { 1322 /* lost race against keypresses */ 1323 status = hid_start_in(hid); 1324 if (status < 0) 1325 hid_io_error(hid); 1326 usbhid_mark_busy(usbhid); 1327 return -EBUSY; 1328 } 1329 dev_dbg(&intf->dev, "suspend\n"); 1330 return 0; 1331 } 1332 1333 static int hid_resume(struct usb_interface *intf) 1334 { 1335 struct hid_device *hid = usb_get_intfdata (intf); 1336 struct usbhid_device *usbhid = hid->driver_data; 1337 int status; 1338 1339 if (!test_bit(HID_STARTED, &usbhid->iofl)) 1340 return 0; 1341 1342 clear_bit(HID_REPORTED_IDLE, &usbhid->iofl); 1343 usbhid_mark_busy(usbhid); 1344 1345 if (test_bit(HID_CLEAR_HALT, &usbhid->iofl) || 1346 test_bit(HID_RESET_PENDING, &usbhid->iofl)) 1347 schedule_work(&usbhid->reset_work); 1348 usbhid->retry_delay = 0; 1349 status = hid_start_in(hid); 1350 if (status < 0) 1351 hid_io_error(hid); 1352 usbhid_restart_queues(usbhid); 1353 1354 dev_dbg(&intf->dev, "resume status %d\n", status); 1355 return 0; 1356 } 1357 1358 static int hid_reset_resume(struct usb_interface *intf) 1359 { 1360 struct hid_device *hid = usb_get_intfdata(intf); 1361 struct usbhid_device *usbhid = hid->driver_data; 1362 1363 clear_bit(HID_REPORTED_IDLE, &usbhid->iofl); 1364 return hid_post_reset(intf); 1365 } 1366 1367 #endif /* CONFIG_PM */ 1368 1369 static const struct usb_device_id hid_usb_ids[] = { 1370 { .match_flags = USB_DEVICE_ID_MATCH_INT_CLASS, 1371 .bInterfaceClass = USB_INTERFACE_CLASS_HID }, 1372 { } /* Terminating entry */ 1373 }; 1374 1375 MODULE_DEVICE_TABLE (usb, hid_usb_ids); 1376 1377 static struct usb_driver hid_driver = { 1378 .name = "usbhid", 1379 .probe = usbhid_probe, 1380 .disconnect = usbhid_disconnect, 1381 #ifdef CONFIG_PM 1382 .suspend = hid_suspend, 1383 .resume = hid_resume, 1384 .reset_resume = hid_reset_resume, 1385 #endif 1386 .pre_reset = hid_pre_reset, 1387 .post_reset = hid_post_reset, 1388 .id_table = hid_usb_ids, 1389 .supports_autosuspend = 1, 1390 }; 1391 1392 static const struct hid_device_id hid_usb_table[] = { 1393 { HID_USB_DEVICE(HID_ANY_ID, HID_ANY_ID) }, 1394 { } 1395 }; 1396 1397 static struct hid_driver hid_usb_driver = { 1398 .name = "generic-usb", 1399 .id_table = hid_usb_table, 1400 }; 1401 1402 static int __init hid_init(void) 1403 { 1404 int retval = -ENOMEM; 1405 1406 resumption_waker = create_freezeable_workqueue("usbhid_resumer"); 1407 if (!resumption_waker) 1408 goto no_queue; 1409 retval = hid_register_driver(&hid_usb_driver); 1410 if (retval) 1411 goto hid_register_fail; 1412 retval = usbhid_quirks_init(quirks_param); 1413 if (retval) 1414 goto usbhid_quirks_init_fail; 1415 retval = hiddev_init(); 1416 if (retval) 1417 goto hiddev_init_fail; 1418 retval = usb_register(&hid_driver); 1419 if (retval) 1420 goto usb_register_fail; 1421 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_DESC "\n"); 1422 1423 return 0; 1424 usb_register_fail: 1425 hiddev_exit(); 1426 hiddev_init_fail: 1427 usbhid_quirks_exit(); 1428 usbhid_quirks_init_fail: 1429 hid_unregister_driver(&hid_usb_driver); 1430 hid_register_fail: 1431 destroy_workqueue(resumption_waker); 1432 no_queue: 1433 return retval; 1434 } 1435 1436 static void __exit hid_exit(void) 1437 { 1438 usb_deregister(&hid_driver); 1439 hiddev_exit(); 1440 usbhid_quirks_exit(); 1441 hid_unregister_driver(&hid_usb_driver); 1442 destroy_workqueue(resumption_waker); 1443 } 1444 1445 module_init(hid_init); 1446 module_exit(hid_exit); 1447 1448 MODULE_AUTHOR("Andreas Gal"); 1449 MODULE_AUTHOR("Vojtech Pavlik"); 1450 MODULE_AUTHOR("Jiri Kosina"); 1451 MODULE_DESCRIPTION(DRIVER_DESC); 1452 MODULE_LICENSE(DRIVER_LICENSE); 1453