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) 2006-2009 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_VERSION "v2.6" 45 #define DRIVER_AUTHOR "Andreas Gal, Vojtech Pavlik, Jiri Kosina" 46 #define DRIVER_DESC "USB HID core driver" 47 #define DRIVER_LICENSE "GPL" 48 49 /* 50 * Module parameters. 51 */ 52 53 static unsigned int hid_mousepoll_interval; 54 module_param_named(mousepoll, hid_mousepoll_interval, uint, 0644); 55 MODULE_PARM_DESC(mousepoll, "Polling interval of mice"); 56 57 static unsigned int ignoreled; 58 module_param_named(ignoreled, ignoreled, uint, 0644); 59 MODULE_PARM_DESC(ignoreled, "Autosuspend with active leds"); 60 61 /* Quirks specified at module load time */ 62 static char *quirks_param[MAX_USBHID_BOOT_QUIRKS] = { [ 0 ... (MAX_USBHID_BOOT_QUIRKS - 1) ] = NULL }; 63 module_param_array_named(quirks, quirks_param, charp, NULL, 0444); 64 MODULE_PARM_DESC(quirks, "Add/modify USB HID quirks by specifying " 65 " quirks=vendorID:productID:quirks" 66 " where vendorID, productID, and quirks are all in" 67 " 0x-prefixed hex"); 68 /* 69 * Input submission and I/O error handler. 70 */ 71 static DEFINE_MUTEX(hid_open_mut); 72 static struct workqueue_struct *resumption_waker; 73 74 static void hid_io_error(struct hid_device *hid); 75 static int hid_submit_out(struct hid_device *hid); 76 static int hid_submit_ctrl(struct hid_device *hid); 77 static void hid_cancel_delayed_stuff(struct usbhid_device *usbhid); 78 79 /* Start up the input URB */ 80 static int hid_start_in(struct hid_device *hid) 81 { 82 unsigned long flags; 83 int rc = 0; 84 struct usbhid_device *usbhid = hid->driver_data; 85 86 spin_lock_irqsave(&usbhid->lock, flags); 87 if (hid->open > 0 && 88 !test_bit(HID_DISCONNECTED, &usbhid->iofl) && 89 !test_bit(HID_REPORTED_IDLE, &usbhid->iofl) && 90 !test_and_set_bit(HID_IN_RUNNING, &usbhid->iofl)) { 91 rc = usb_submit_urb(usbhid->urbin, GFP_ATOMIC); 92 if (rc != 0) 93 clear_bit(HID_IN_RUNNING, &usbhid->iofl); 94 } 95 spin_unlock_irqrestore(&usbhid->lock, flags); 96 return rc; 97 } 98 99 /* I/O retry timer routine */ 100 static void hid_retry_timeout(unsigned long _hid) 101 { 102 struct hid_device *hid = (struct hid_device *) _hid; 103 struct usbhid_device *usbhid = hid->driver_data; 104 105 dev_dbg(&usbhid->intf->dev, "retrying intr urb\n"); 106 if (hid_start_in(hid)) 107 hid_io_error(hid); 108 } 109 110 /* Workqueue routine to reset the device or clear a halt */ 111 static void hid_reset(struct work_struct *work) 112 { 113 struct usbhid_device *usbhid = 114 container_of(work, struct usbhid_device, reset_work); 115 struct hid_device *hid = usbhid->hid; 116 int rc = 0; 117 118 if (test_bit(HID_CLEAR_HALT, &usbhid->iofl)) { 119 dev_dbg(&usbhid->intf->dev, "clear halt\n"); 120 rc = usb_clear_halt(hid_to_usb_dev(hid), usbhid->urbin->pipe); 121 clear_bit(HID_CLEAR_HALT, &usbhid->iofl); 122 hid_start_in(hid); 123 } 124 125 else if (test_bit(HID_RESET_PENDING, &usbhid->iofl)) { 126 dev_dbg(&usbhid->intf->dev, "resetting device\n"); 127 rc = usb_lock_device_for_reset(hid_to_usb_dev(hid), usbhid->intf); 128 if (rc == 0) { 129 rc = usb_reset_device(hid_to_usb_dev(hid)); 130 usb_unlock_device(hid_to_usb_dev(hid)); 131 } 132 clear_bit(HID_RESET_PENDING, &usbhid->iofl); 133 } 134 135 switch (rc) { 136 case 0: 137 if (!test_bit(HID_IN_RUNNING, &usbhid->iofl)) 138 hid_io_error(hid); 139 break; 140 default: 141 err_hid("can't reset device, %s-%s/input%d, status %d", 142 hid_to_usb_dev(hid)->bus->bus_name, 143 hid_to_usb_dev(hid)->devpath, 144 usbhid->ifnum, rc); 145 /* FALLTHROUGH */ 146 case -EHOSTUNREACH: 147 case -ENODEV: 148 case -EINTR: 149 break; 150 } 151 } 152 153 /* Main I/O error handler */ 154 static void hid_io_error(struct hid_device *hid) 155 { 156 unsigned long flags; 157 struct usbhid_device *usbhid = hid->driver_data; 158 159 spin_lock_irqsave(&usbhid->lock, flags); 160 161 /* Stop when disconnected */ 162 if (test_bit(HID_DISCONNECTED, &usbhid->iofl)) 163 goto done; 164 165 /* If it has been a while since the last error, we'll assume 166 * this a brand new error and reset the retry timeout. */ 167 if (time_after(jiffies, usbhid->stop_retry + HZ/2)) 168 usbhid->retry_delay = 0; 169 170 /* When an error occurs, retry at increasing intervals */ 171 if (usbhid->retry_delay == 0) { 172 usbhid->retry_delay = 13; /* Then 26, 52, 104, 104, ... */ 173 usbhid->stop_retry = jiffies + msecs_to_jiffies(1000); 174 } else if (usbhid->retry_delay < 100) 175 usbhid->retry_delay *= 2; 176 177 if (time_after(jiffies, usbhid->stop_retry)) { 178 179 /* Retries failed, so do a port reset */ 180 if (!test_and_set_bit(HID_RESET_PENDING, &usbhid->iofl)) { 181 schedule_work(&usbhid->reset_work); 182 goto done; 183 } 184 } 185 186 mod_timer(&usbhid->io_retry, 187 jiffies + msecs_to_jiffies(usbhid->retry_delay)); 188 done: 189 spin_unlock_irqrestore(&usbhid->lock, flags); 190 } 191 192 static void usbhid_mark_busy(struct usbhid_device *usbhid) 193 { 194 struct usb_interface *intf = usbhid->intf; 195 196 usb_mark_last_busy(interface_to_usbdev(intf)); 197 } 198 199 static int usbhid_restart_out_queue(struct usbhid_device *usbhid) 200 { 201 struct hid_device *hid = usb_get_intfdata(usbhid->intf); 202 int kicked; 203 204 if (!hid) 205 return 0; 206 207 if ((kicked = (usbhid->outhead != usbhid->outtail))) { 208 dbg("Kicking head %d tail %d", usbhid->outhead, usbhid->outtail); 209 if (hid_submit_out(hid)) { 210 clear_bit(HID_OUT_RUNNING, &usbhid->iofl); 211 wake_up(&usbhid->wait); 212 } 213 } 214 return kicked; 215 } 216 217 static int usbhid_restart_ctrl_queue(struct usbhid_device *usbhid) 218 { 219 struct hid_device *hid = usb_get_intfdata(usbhid->intf); 220 int kicked; 221 222 WARN_ON(hid == NULL); 223 if (!hid) 224 return 0; 225 226 if ((kicked = (usbhid->ctrlhead != usbhid->ctrltail))) { 227 dbg("Kicking head %d tail %d", usbhid->ctrlhead, usbhid->ctrltail); 228 if (hid_submit_ctrl(hid)) { 229 clear_bit(HID_CTRL_RUNNING, &usbhid->iofl); 230 wake_up(&usbhid->wait); 231 } 232 } 233 return kicked; 234 } 235 236 /* 237 * Input interrupt completion handler. 238 */ 239 240 static void hid_irq_in(struct urb *urb) 241 { 242 struct hid_device *hid = urb->context; 243 struct usbhid_device *usbhid = hid->driver_data; 244 int status; 245 246 switch (urb->status) { 247 case 0: /* success */ 248 usbhid_mark_busy(usbhid); 249 usbhid->retry_delay = 0; 250 hid_input_report(urb->context, HID_INPUT_REPORT, 251 urb->transfer_buffer, 252 urb->actual_length, 1); 253 /* 254 * autosuspend refused while keys are pressed 255 * because most keyboards don't wake up when 256 * a key is released 257 */ 258 if (hid_check_keys_pressed(hid)) 259 set_bit(HID_KEYS_PRESSED, &usbhid->iofl); 260 else 261 clear_bit(HID_KEYS_PRESSED, &usbhid->iofl); 262 break; 263 case -EPIPE: /* stall */ 264 usbhid_mark_busy(usbhid); 265 clear_bit(HID_IN_RUNNING, &usbhid->iofl); 266 set_bit(HID_CLEAR_HALT, &usbhid->iofl); 267 schedule_work(&usbhid->reset_work); 268 return; 269 case -ECONNRESET: /* unlink */ 270 case -ENOENT: 271 case -ESHUTDOWN: /* unplug */ 272 clear_bit(HID_IN_RUNNING, &usbhid->iofl); 273 return; 274 case -EILSEQ: /* protocol error or unplug */ 275 case -EPROTO: /* protocol error or unplug */ 276 case -ETIME: /* protocol error or unplug */ 277 case -ETIMEDOUT: /* Should never happen, but... */ 278 usbhid_mark_busy(usbhid); 279 clear_bit(HID_IN_RUNNING, &usbhid->iofl); 280 hid_io_error(hid); 281 return; 282 default: /* error */ 283 dev_warn(&urb->dev->dev, "input irq status %d " 284 "received\n", urb->status); 285 } 286 287 status = usb_submit_urb(urb, GFP_ATOMIC); 288 if (status) { 289 clear_bit(HID_IN_RUNNING, &usbhid->iofl); 290 if (status != -EPERM) { 291 err_hid("can't resubmit intr, %s-%s/input%d, status %d", 292 hid_to_usb_dev(hid)->bus->bus_name, 293 hid_to_usb_dev(hid)->devpath, 294 usbhid->ifnum, status); 295 hid_io_error(hid); 296 } 297 } 298 } 299 300 static int hid_submit_out(struct hid_device *hid) 301 { 302 struct hid_report *report; 303 char *raw_report; 304 struct usbhid_device *usbhid = hid->driver_data; 305 306 report = usbhid->out[usbhid->outtail].report; 307 raw_report = usbhid->out[usbhid->outtail].raw_report; 308 309 if (!test_bit(HID_REPORTED_IDLE, &usbhid->iofl)) { 310 usbhid->urbout->transfer_buffer_length = ((report->size - 1) >> 3) + 1 + (report->id > 0); 311 usbhid->urbout->dev = hid_to_usb_dev(hid); 312 memcpy(usbhid->outbuf, raw_report, usbhid->urbout->transfer_buffer_length); 313 kfree(raw_report); 314 315 dbg_hid("submitting out urb\n"); 316 317 if (usb_submit_urb(usbhid->urbout, GFP_ATOMIC)) { 318 err_hid("usb_submit_urb(out) failed"); 319 return -1; 320 } 321 } else { 322 /* 323 * queue work to wake up the device. 324 * as the work queue is freezeable, this is safe 325 * with respect to STD and STR 326 */ 327 queue_work(resumption_waker, &usbhid->restart_work); 328 } 329 330 return 0; 331 } 332 333 static int hid_submit_ctrl(struct hid_device *hid) 334 { 335 struct hid_report *report; 336 unsigned char dir; 337 char *raw_report; 338 int len; 339 struct usbhid_device *usbhid = hid->driver_data; 340 341 report = usbhid->ctrl[usbhid->ctrltail].report; 342 raw_report = usbhid->ctrl[usbhid->ctrltail].raw_report; 343 dir = usbhid->ctrl[usbhid->ctrltail].dir; 344 345 if (!test_bit(HID_REPORTED_IDLE, &usbhid->iofl)) { 346 len = ((report->size - 1) >> 3) + 1 + (report->id > 0); 347 if (dir == USB_DIR_OUT) { 348 usbhid->urbctrl->pipe = usb_sndctrlpipe(hid_to_usb_dev(hid), 0); 349 usbhid->urbctrl->transfer_buffer_length = len; 350 memcpy(usbhid->ctrlbuf, raw_report, len); 351 kfree(raw_report); 352 } else { 353 int maxpacket, padlen; 354 355 usbhid->urbctrl->pipe = usb_rcvctrlpipe(hid_to_usb_dev(hid), 0); 356 maxpacket = usb_maxpacket(hid_to_usb_dev(hid), usbhid->urbctrl->pipe, 0); 357 if (maxpacket > 0) { 358 padlen = DIV_ROUND_UP(len, maxpacket); 359 padlen *= maxpacket; 360 if (padlen > usbhid->bufsize) 361 padlen = usbhid->bufsize; 362 } else 363 padlen = 0; 364 usbhid->urbctrl->transfer_buffer_length = padlen; 365 } 366 usbhid->urbctrl->dev = hid_to_usb_dev(hid); 367 368 usbhid->cr->bRequestType = USB_TYPE_CLASS | USB_RECIP_INTERFACE | dir; 369 usbhid->cr->bRequest = (dir == USB_DIR_OUT) ? HID_REQ_SET_REPORT : HID_REQ_GET_REPORT; 370 usbhid->cr->wValue = cpu_to_le16(((report->type + 1) << 8) | report->id); 371 usbhid->cr->wIndex = cpu_to_le16(usbhid->ifnum); 372 usbhid->cr->wLength = cpu_to_le16(len); 373 374 dbg_hid("submitting ctrl urb: %s wValue=0x%04x wIndex=0x%04x wLength=%u\n", 375 usbhid->cr->bRequest == HID_REQ_SET_REPORT ? "Set_Report" : "Get_Report", 376 usbhid->cr->wValue, usbhid->cr->wIndex, usbhid->cr->wLength); 377 378 if (usb_submit_urb(usbhid->urbctrl, GFP_ATOMIC)) { 379 err_hid("usb_submit_urb(ctrl) failed"); 380 return -1; 381 } 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 return; 521 } 522 523 if ((head = (usbhid->ctrlhead + 1) & (HID_CONTROL_FIFO_SIZE - 1)) == usbhid->ctrltail) { 524 dev_warn(&hid->dev, "control queue full\n"); 525 return; 526 } 527 528 if (dir == USB_DIR_OUT) { 529 usbhid->ctrl[usbhid->ctrlhead].raw_report = kmalloc(len, GFP_ATOMIC); 530 if (!usbhid->ctrl[usbhid->ctrlhead].raw_report) { 531 dev_warn(&hid->dev, "control queueing failed\n"); 532 return; 533 } 534 hid_output_report(report, usbhid->ctrl[usbhid->ctrlhead].raw_report); 535 } 536 usbhid->ctrl[usbhid->ctrlhead].report = report; 537 usbhid->ctrl[usbhid->ctrlhead].dir = dir; 538 usbhid->ctrlhead = head; 539 540 if (!test_and_set_bit(HID_CTRL_RUNNING, &usbhid->iofl)) 541 if (hid_submit_ctrl(hid)) 542 clear_bit(HID_CTRL_RUNNING, &usbhid->iofl); 543 } 544 545 void usbhid_submit_report(struct hid_device *hid, struct hid_report *report, unsigned char dir) 546 { 547 struct usbhid_device *usbhid = hid->driver_data; 548 unsigned long flags; 549 550 spin_lock_irqsave(&usbhid->lock, flags); 551 __usbhid_submit_report(hid, report, dir); 552 spin_unlock_irqrestore(&usbhid->lock, flags); 553 } 554 EXPORT_SYMBOL_GPL(usbhid_submit_report); 555 556 static int usb_hidinput_input_event(struct input_dev *dev, unsigned int type, unsigned int code, int value) 557 { 558 struct hid_device *hid = input_get_drvdata(dev); 559 struct usbhid_device *usbhid = hid->driver_data; 560 struct hid_field *field; 561 unsigned long flags; 562 int offset; 563 564 if (type == EV_FF) 565 return input_ff_event(dev, type, code, value); 566 567 if (type != EV_LED) 568 return -1; 569 570 if ((offset = hidinput_find_field(hid, type, code, &field)) == -1) { 571 dev_warn(&dev->dev, "event field not found\n"); 572 return -1; 573 } 574 575 hid_set_field(field, offset, value); 576 if (value) { 577 spin_lock_irqsave(&usbhid->lock, flags); 578 usbhid->ledcount++; 579 spin_unlock_irqrestore(&usbhid->lock, flags); 580 } else { 581 spin_lock_irqsave(&usbhid->lock, flags); 582 usbhid->ledcount--; 583 spin_unlock_irqrestore(&usbhid->lock, flags); 584 } 585 usbhid_submit_report(hid, field->report, USB_DIR_OUT); 586 587 return 0; 588 } 589 590 int usbhid_wait_io(struct hid_device *hid) 591 { 592 struct usbhid_device *usbhid = hid->driver_data; 593 594 if (!wait_event_timeout(usbhid->wait, 595 (!test_bit(HID_CTRL_RUNNING, &usbhid->iofl) && 596 !test_bit(HID_OUT_RUNNING, &usbhid->iofl)), 597 10*HZ)) { 598 dbg_hid("timeout waiting for ctrl or out queue to clear\n"); 599 return -1; 600 } 601 602 return 0; 603 } 604 605 static int hid_set_idle(struct usb_device *dev, int ifnum, int report, int idle) 606 { 607 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), 608 HID_REQ_SET_IDLE, USB_TYPE_CLASS | USB_RECIP_INTERFACE, (idle << 8) | report, 609 ifnum, NULL, 0, USB_CTRL_SET_TIMEOUT); 610 } 611 612 static int hid_get_class_descriptor(struct usb_device *dev, int ifnum, 613 unsigned char type, void *buf, int size) 614 { 615 int result, retries = 4; 616 617 memset(buf, 0, size); 618 619 do { 620 result = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), 621 USB_REQ_GET_DESCRIPTOR, USB_RECIP_INTERFACE | USB_DIR_IN, 622 (type << 8), ifnum, buf, size, USB_CTRL_GET_TIMEOUT); 623 retries--; 624 } while (result < size && retries); 625 return result; 626 } 627 628 int usbhid_open(struct hid_device *hid) 629 { 630 struct usbhid_device *usbhid = hid->driver_data; 631 int res; 632 633 mutex_lock(&hid_open_mut); 634 if (!hid->open++) { 635 res = usb_autopm_get_interface(usbhid->intf); 636 /* the device must be awake to reliable request remote wakeup */ 637 if (res < 0) { 638 hid->open--; 639 mutex_unlock(&hid_open_mut); 640 return -EIO; 641 } 642 usbhid->intf->needs_remote_wakeup = 1; 643 if (hid_start_in(hid)) 644 hid_io_error(hid); 645 646 usb_autopm_put_interface(usbhid->intf); 647 } 648 mutex_unlock(&hid_open_mut); 649 return 0; 650 } 651 652 void usbhid_close(struct hid_device *hid) 653 { 654 struct usbhid_device *usbhid = hid->driver_data; 655 656 mutex_lock(&hid_open_mut); 657 658 /* protecting hid->open to make sure we don't restart 659 * data acquistion due to a resumption we no longer 660 * care about 661 */ 662 spin_lock_irq(&usbhid->lock); 663 if (!--hid->open) { 664 spin_unlock_irq(&usbhid->lock); 665 hid_cancel_delayed_stuff(usbhid); 666 usb_kill_urb(usbhid->urbin); 667 usbhid->intf->needs_remote_wakeup = 0; 668 } else { 669 spin_unlock_irq(&usbhid->lock); 670 } 671 mutex_unlock(&hid_open_mut); 672 } 673 674 /* 675 * Initialize all reports 676 */ 677 678 void usbhid_init_reports(struct hid_device *hid) 679 { 680 struct hid_report *report; 681 struct usbhid_device *usbhid = hid->driver_data; 682 int err, ret; 683 684 list_for_each_entry(report, &hid->report_enum[HID_INPUT_REPORT].report_list, list) 685 usbhid_submit_report(hid, report, USB_DIR_IN); 686 687 list_for_each_entry(report, &hid->report_enum[HID_FEATURE_REPORT].report_list, list) 688 usbhid_submit_report(hid, report, USB_DIR_IN); 689 690 err = 0; 691 ret = usbhid_wait_io(hid); 692 while (ret) { 693 err |= ret; 694 if (test_bit(HID_CTRL_RUNNING, &usbhid->iofl)) 695 usb_kill_urb(usbhid->urbctrl); 696 if (test_bit(HID_OUT_RUNNING, &usbhid->iofl)) 697 usb_kill_urb(usbhid->urbout); 698 ret = usbhid_wait_io(hid); 699 } 700 701 if (err) 702 dev_warn(&hid->dev, "timeout initializing reports\n"); 703 } 704 705 /* 706 * Reset LEDs which BIOS might have left on. For now, just NumLock (0x01). 707 */ 708 static int hid_find_field_early(struct hid_device *hid, unsigned int page, 709 unsigned int hid_code, struct hid_field **pfield) 710 { 711 struct hid_report *report; 712 struct hid_field *field; 713 struct hid_usage *usage; 714 int i, j; 715 716 list_for_each_entry(report, &hid->report_enum[HID_OUTPUT_REPORT].report_list, list) { 717 for (i = 0; i < report->maxfield; i++) { 718 field = report->field[i]; 719 for (j = 0; j < field->maxusage; j++) { 720 usage = &field->usage[j]; 721 if ((usage->hid & HID_USAGE_PAGE) == page && 722 (usage->hid & 0xFFFF) == hid_code) { 723 *pfield = field; 724 return j; 725 } 726 } 727 } 728 } 729 return -1; 730 } 731 732 void usbhid_set_leds(struct hid_device *hid) 733 { 734 struct hid_field *field; 735 int offset; 736 737 if ((offset = hid_find_field_early(hid, HID_UP_LED, 0x01, &field)) != -1) { 738 hid_set_field(field, offset, 0); 739 usbhid_submit_report(hid, field->report, USB_DIR_OUT); 740 } 741 } 742 EXPORT_SYMBOL_GPL(usbhid_set_leds); 743 744 /* 745 * Traverse the supplied list of reports and find the longest 746 */ 747 static void hid_find_max_report(struct hid_device *hid, unsigned int type, 748 unsigned int *max) 749 { 750 struct hid_report *report; 751 unsigned int size; 752 753 list_for_each_entry(report, &hid->report_enum[type].report_list, list) { 754 size = ((report->size - 1) >> 3) + 1 + hid->report_enum[type].numbered; 755 if (*max < size) 756 *max = size; 757 } 758 } 759 760 static int hid_alloc_buffers(struct usb_device *dev, struct hid_device *hid) 761 { 762 struct usbhid_device *usbhid = hid->driver_data; 763 764 usbhid->inbuf = usb_buffer_alloc(dev, usbhid->bufsize, GFP_KERNEL, 765 &usbhid->inbuf_dma); 766 usbhid->outbuf = usb_buffer_alloc(dev, usbhid->bufsize, GFP_KERNEL, 767 &usbhid->outbuf_dma); 768 usbhid->cr = usb_buffer_alloc(dev, sizeof(*usbhid->cr), GFP_KERNEL, 769 &usbhid->cr_dma); 770 usbhid->ctrlbuf = usb_buffer_alloc(dev, usbhid->bufsize, GFP_KERNEL, 771 &usbhid->ctrlbuf_dma); 772 if (!usbhid->inbuf || !usbhid->outbuf || !usbhid->cr || 773 !usbhid->ctrlbuf) 774 return -1; 775 776 return 0; 777 } 778 779 static int usbhid_output_raw_report(struct hid_device *hid, __u8 *buf, size_t count) 780 { 781 struct usbhid_device *usbhid = hid->driver_data; 782 struct usb_device *dev = hid_to_usb_dev(hid); 783 struct usb_interface *intf = usbhid->intf; 784 struct usb_host_interface *interface = intf->cur_altsetting; 785 int ret; 786 787 ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), 788 HID_REQ_SET_REPORT, 789 USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE, 790 ((HID_OUTPUT_REPORT + 1) << 8) | *buf, 791 interface->desc.bInterfaceNumber, buf + 1, count - 1, 792 USB_CTRL_SET_TIMEOUT); 793 794 /* count also the report id */ 795 if (ret > 0) 796 ret++; 797 798 return ret; 799 } 800 801 static void usbhid_restart_queues(struct usbhid_device *usbhid) 802 { 803 if (usbhid->urbout) 804 usbhid_restart_out_queue(usbhid); 805 usbhid_restart_ctrl_queue(usbhid); 806 } 807 808 static void __usbhid_restart_queues(struct work_struct *work) 809 { 810 struct usbhid_device *usbhid = 811 container_of(work, struct usbhid_device, restart_work); 812 int r; 813 814 r = usb_autopm_get_interface(usbhid->intf); 815 if (r < 0) 816 return; 817 usb_autopm_put_interface(usbhid->intf); 818 } 819 820 static void hid_free_buffers(struct usb_device *dev, struct hid_device *hid) 821 { 822 struct usbhid_device *usbhid = hid->driver_data; 823 824 usb_buffer_free(dev, usbhid->bufsize, usbhid->inbuf, usbhid->inbuf_dma); 825 usb_buffer_free(dev, usbhid->bufsize, usbhid->outbuf, usbhid->outbuf_dma); 826 usb_buffer_free(dev, sizeof(*(usbhid->cr)), usbhid->cr, usbhid->cr_dma); 827 usb_buffer_free(dev, usbhid->bufsize, usbhid->ctrlbuf, usbhid->ctrlbuf_dma); 828 } 829 830 static int usbhid_parse(struct hid_device *hid) 831 { 832 struct usb_interface *intf = to_usb_interface(hid->dev.parent); 833 struct usb_host_interface *interface = intf->cur_altsetting; 834 struct usb_device *dev = interface_to_usbdev (intf); 835 struct hid_descriptor *hdesc; 836 u32 quirks = 0; 837 unsigned int rsize = 0; 838 char *rdesc; 839 int ret, n; 840 841 quirks = usbhid_lookup_quirk(le16_to_cpu(dev->descriptor.idVendor), 842 le16_to_cpu(dev->descriptor.idProduct)); 843 844 if (quirks & HID_QUIRK_IGNORE) 845 return -ENODEV; 846 847 /* Many keyboards and mice don't like to be polled for reports, 848 * so we will always set the HID_QUIRK_NOGET flag for them. */ 849 if (interface->desc.bInterfaceSubClass == USB_INTERFACE_SUBCLASS_BOOT) { 850 if (interface->desc.bInterfaceProtocol == USB_INTERFACE_PROTOCOL_KEYBOARD || 851 interface->desc.bInterfaceProtocol == USB_INTERFACE_PROTOCOL_MOUSE) 852 quirks |= HID_QUIRK_NOGET; 853 } 854 855 if (usb_get_extra_descriptor(interface, HID_DT_HID, &hdesc) && 856 (!interface->desc.bNumEndpoints || 857 usb_get_extra_descriptor(&interface->endpoint[0], HID_DT_HID, &hdesc))) { 858 dbg_hid("class descriptor not present\n"); 859 return -ENODEV; 860 } 861 862 hid->version = le16_to_cpu(hdesc->bcdHID); 863 hid->country = hdesc->bCountryCode; 864 865 for (n = 0; n < hdesc->bNumDescriptors; n++) 866 if (hdesc->desc[n].bDescriptorType == HID_DT_REPORT) 867 rsize = le16_to_cpu(hdesc->desc[n].wDescriptorLength); 868 869 if (!rsize || rsize > HID_MAX_DESCRIPTOR_SIZE) { 870 dbg_hid("weird size of report descriptor (%u)\n", rsize); 871 return -EINVAL; 872 } 873 874 if (!(rdesc = kmalloc(rsize, GFP_KERNEL))) { 875 dbg_hid("couldn't allocate rdesc memory\n"); 876 return -ENOMEM; 877 } 878 879 hid_set_idle(dev, interface->desc.bInterfaceNumber, 0, 0); 880 881 ret = hid_get_class_descriptor(dev, interface->desc.bInterfaceNumber, 882 HID_DT_REPORT, rdesc, rsize); 883 if (ret < 0) { 884 dbg_hid("reading report descriptor failed\n"); 885 kfree(rdesc); 886 goto err; 887 } 888 889 ret = hid_parse_report(hid, rdesc, rsize); 890 kfree(rdesc); 891 if (ret) { 892 dbg_hid("parsing report descriptor failed\n"); 893 goto err; 894 } 895 896 hid->quirks |= quirks; 897 898 return 0; 899 err: 900 return ret; 901 } 902 903 static int usbhid_start(struct hid_device *hid) 904 { 905 struct usb_interface *intf = to_usb_interface(hid->dev.parent); 906 struct usb_host_interface *interface = intf->cur_altsetting; 907 struct usb_device *dev = interface_to_usbdev(intf); 908 struct usbhid_device *usbhid = hid->driver_data; 909 unsigned int n, insize = 0; 910 int ret; 911 912 clear_bit(HID_DISCONNECTED, &usbhid->iofl); 913 914 usbhid->bufsize = HID_MIN_BUFFER_SIZE; 915 hid_find_max_report(hid, HID_INPUT_REPORT, &usbhid->bufsize); 916 hid_find_max_report(hid, HID_OUTPUT_REPORT, &usbhid->bufsize); 917 hid_find_max_report(hid, HID_FEATURE_REPORT, &usbhid->bufsize); 918 919 if (usbhid->bufsize > HID_MAX_BUFFER_SIZE) 920 usbhid->bufsize = HID_MAX_BUFFER_SIZE; 921 922 hid_find_max_report(hid, HID_INPUT_REPORT, &insize); 923 924 if (insize > HID_MAX_BUFFER_SIZE) 925 insize = HID_MAX_BUFFER_SIZE; 926 927 if (hid_alloc_buffers(dev, hid)) { 928 ret = -ENOMEM; 929 goto fail; 930 } 931 932 for (n = 0; n < interface->desc.bNumEndpoints; n++) { 933 struct usb_endpoint_descriptor *endpoint; 934 int pipe; 935 int interval; 936 937 endpoint = &interface->endpoint[n].desc; 938 if (!usb_endpoint_xfer_int(endpoint)) 939 continue; 940 941 interval = endpoint->bInterval; 942 943 /* Some vendors give fullspeed interval on highspeed devides */ 944 if (hid->quirks & HID_QUIRK_FULLSPEED_INTERVAL && 945 dev->speed == USB_SPEED_HIGH) { 946 interval = fls(endpoint->bInterval*8); 947 printk(KERN_INFO "%s: Fixing fullspeed to highspeed interval: %d -> %d\n", 948 hid->name, endpoint->bInterval, interval); 949 } 950 951 /* Change the polling interval of mice. */ 952 if (hid->collection->usage == HID_GD_MOUSE && hid_mousepoll_interval > 0) 953 interval = hid_mousepoll_interval; 954 955 ret = -ENOMEM; 956 if (usb_endpoint_dir_in(endpoint)) { 957 if (usbhid->urbin) 958 continue; 959 if (!(usbhid->urbin = usb_alloc_urb(0, GFP_KERNEL))) 960 goto fail; 961 pipe = usb_rcvintpipe(dev, endpoint->bEndpointAddress); 962 usb_fill_int_urb(usbhid->urbin, dev, pipe, usbhid->inbuf, insize, 963 hid_irq_in, hid, interval); 964 usbhid->urbin->transfer_dma = usbhid->inbuf_dma; 965 usbhid->urbin->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; 966 } else { 967 if (usbhid->urbout) 968 continue; 969 if (!(usbhid->urbout = usb_alloc_urb(0, GFP_KERNEL))) 970 goto fail; 971 pipe = usb_sndintpipe(dev, endpoint->bEndpointAddress); 972 usb_fill_int_urb(usbhid->urbout, dev, pipe, usbhid->outbuf, 0, 973 hid_irq_out, hid, interval); 974 usbhid->urbout->transfer_dma = usbhid->outbuf_dma; 975 usbhid->urbout->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; 976 } 977 } 978 979 init_waitqueue_head(&usbhid->wait); 980 INIT_WORK(&usbhid->reset_work, hid_reset); 981 INIT_WORK(&usbhid->restart_work, __usbhid_restart_queues); 982 setup_timer(&usbhid->io_retry, hid_retry_timeout, (unsigned long) hid); 983 984 spin_lock_init(&usbhid->lock); 985 986 usbhid->intf = intf; 987 usbhid->ifnum = interface->desc.bInterfaceNumber; 988 989 usbhid->urbctrl = usb_alloc_urb(0, GFP_KERNEL); 990 if (!usbhid->urbctrl) { 991 ret = -ENOMEM; 992 goto fail; 993 } 994 995 usb_fill_control_urb(usbhid->urbctrl, dev, 0, (void *) usbhid->cr, 996 usbhid->ctrlbuf, 1, hid_ctrl, hid); 997 usbhid->urbctrl->setup_dma = usbhid->cr_dma; 998 usbhid->urbctrl->transfer_dma = usbhid->ctrlbuf_dma; 999 usbhid->urbctrl->transfer_flags |= (URB_NO_TRANSFER_DMA_MAP | URB_NO_SETUP_DMA_MAP); 1000 1001 usbhid_init_reports(hid); 1002 1003 set_bit(HID_STARTED, &usbhid->iofl); 1004 1005 /* Some keyboards don't work until their LEDs have been set. 1006 * Since BIOSes do set the LEDs, it must be safe for any device 1007 * that supports the keyboard boot protocol. 1008 */ 1009 if (interface->desc.bInterfaceSubClass == USB_INTERFACE_SUBCLASS_BOOT && 1010 interface->desc.bInterfaceProtocol == 1011 USB_INTERFACE_PROTOCOL_KEYBOARD) 1012 usbhid_set_leds(hid); 1013 1014 return 0; 1015 1016 fail: 1017 usb_free_urb(usbhid->urbin); 1018 usb_free_urb(usbhid->urbout); 1019 usb_free_urb(usbhid->urbctrl); 1020 usbhid->urbin = NULL; 1021 usbhid->urbout = NULL; 1022 usbhid->urbctrl = NULL; 1023 hid_free_buffers(dev, hid); 1024 return ret; 1025 } 1026 1027 static void usbhid_stop(struct hid_device *hid) 1028 { 1029 struct usbhid_device *usbhid = hid->driver_data; 1030 1031 if (WARN_ON(!usbhid)) 1032 return; 1033 1034 clear_bit(HID_STARTED, &usbhid->iofl); 1035 spin_lock_irq(&usbhid->lock); /* Sync with error handler */ 1036 set_bit(HID_DISCONNECTED, &usbhid->iofl); 1037 spin_unlock_irq(&usbhid->lock); 1038 usb_kill_urb(usbhid->urbin); 1039 usb_kill_urb(usbhid->urbout); 1040 usb_kill_urb(usbhid->urbctrl); 1041 1042 hid_cancel_delayed_stuff(usbhid); 1043 1044 if (hid->claimed & HID_CLAIMED_INPUT) 1045 hidinput_disconnect(hid); 1046 if (hid->claimed & HID_CLAIMED_HIDDEV) 1047 hiddev_disconnect(hid); 1048 if (hid->claimed & HID_CLAIMED_HIDRAW) 1049 hidraw_disconnect(hid); 1050 1051 hid->claimed = 0; 1052 1053 usb_free_urb(usbhid->urbin); 1054 usb_free_urb(usbhid->urbctrl); 1055 usb_free_urb(usbhid->urbout); 1056 usbhid->urbin = NULL; /* don't mess up next start */ 1057 usbhid->urbctrl = NULL; 1058 usbhid->urbout = NULL; 1059 1060 hid_free_buffers(hid_to_usb_dev(hid), hid); 1061 } 1062 1063 static int usbhid_power(struct hid_device *hid, int lvl) 1064 { 1065 int r = 0; 1066 1067 switch (lvl) { 1068 case PM_HINT_FULLON: 1069 r = usbhid_get_power(hid); 1070 break; 1071 case PM_HINT_NORMAL: 1072 usbhid_put_power(hid); 1073 break; 1074 } 1075 return r; 1076 } 1077 1078 static struct hid_ll_driver usb_hid_driver = { 1079 .parse = usbhid_parse, 1080 .start = usbhid_start, 1081 .stop = usbhid_stop, 1082 .open = usbhid_open, 1083 .close = usbhid_close, 1084 .power = usbhid_power, 1085 .hidinput_input_event = usb_hidinput_input_event, 1086 }; 1087 1088 static int hid_probe(struct usb_interface *intf, const struct usb_device_id *id) 1089 { 1090 struct usb_host_interface *interface = intf->cur_altsetting; 1091 struct usb_device *dev = interface_to_usbdev(intf); 1092 struct usbhid_device *usbhid; 1093 struct hid_device *hid; 1094 unsigned int n, has_in = 0; 1095 size_t len; 1096 int ret; 1097 1098 dbg_hid("HID probe called for ifnum %d\n", 1099 intf->altsetting->desc.bInterfaceNumber); 1100 1101 for (n = 0; n < interface->desc.bNumEndpoints; n++) 1102 if (usb_endpoint_is_int_in(&interface->endpoint[n].desc)) 1103 has_in++; 1104 if (!has_in) { 1105 dev_err(&intf->dev, "couldn't find an input interrupt " 1106 "endpoint\n"); 1107 return -ENODEV; 1108 } 1109 1110 hid = hid_allocate_device(); 1111 if (IS_ERR(hid)) 1112 return PTR_ERR(hid); 1113 1114 usb_set_intfdata(intf, hid); 1115 hid->ll_driver = &usb_hid_driver; 1116 hid->hid_output_raw_report = usbhid_output_raw_report; 1117 hid->ff_init = hid_pidff_init; 1118 #ifdef CONFIG_USB_HIDDEV 1119 hid->hiddev_connect = hiddev_connect; 1120 hid->hiddev_hid_event = hiddev_hid_event; 1121 hid->hiddev_report_event = hiddev_report_event; 1122 #endif 1123 hid->dev.parent = &intf->dev; 1124 hid->bus = BUS_USB; 1125 hid->vendor = le16_to_cpu(dev->descriptor.idVendor); 1126 hid->product = le16_to_cpu(dev->descriptor.idProduct); 1127 hid->name[0] = 0; 1128 if (intf->cur_altsetting->desc.bInterfaceProtocol == 1129 USB_INTERFACE_PROTOCOL_MOUSE) 1130 hid->type = HID_TYPE_USBMOUSE; 1131 1132 if (dev->manufacturer) 1133 strlcpy(hid->name, dev->manufacturer, sizeof(hid->name)); 1134 1135 if (dev->product) { 1136 if (dev->manufacturer) 1137 strlcat(hid->name, " ", sizeof(hid->name)); 1138 strlcat(hid->name, dev->product, sizeof(hid->name)); 1139 } 1140 1141 if (!strlen(hid->name)) 1142 snprintf(hid->name, sizeof(hid->name), "HID %04x:%04x", 1143 le16_to_cpu(dev->descriptor.idVendor), 1144 le16_to_cpu(dev->descriptor.idProduct)); 1145 1146 usb_make_path(dev, hid->phys, sizeof(hid->phys)); 1147 strlcat(hid->phys, "/input", sizeof(hid->phys)); 1148 len = strlen(hid->phys); 1149 if (len < sizeof(hid->phys) - 1) 1150 snprintf(hid->phys + len, sizeof(hid->phys) - len, 1151 "%d", intf->altsetting[0].desc.bInterfaceNumber); 1152 1153 if (usb_string(dev, dev->descriptor.iSerialNumber, hid->uniq, 64) <= 0) 1154 hid->uniq[0] = 0; 1155 1156 usbhid = kzalloc(sizeof(*usbhid), GFP_KERNEL); 1157 if (usbhid == NULL) { 1158 ret = -ENOMEM; 1159 goto err; 1160 } 1161 1162 hid->driver_data = usbhid; 1163 usbhid->hid = hid; 1164 1165 ret = hid_add_device(hid); 1166 if (ret) { 1167 if (ret != -ENODEV) 1168 dev_err(&intf->dev, "can't add hid device: %d\n", ret); 1169 goto err_free; 1170 } 1171 1172 return 0; 1173 err_free: 1174 kfree(usbhid); 1175 err: 1176 hid_destroy_device(hid); 1177 return ret; 1178 } 1179 1180 static void hid_disconnect(struct usb_interface *intf) 1181 { 1182 struct hid_device *hid = usb_get_intfdata(intf); 1183 struct usbhid_device *usbhid; 1184 1185 if (WARN_ON(!hid)) 1186 return; 1187 1188 usbhid = hid->driver_data; 1189 hid_destroy_device(hid); 1190 kfree(usbhid); 1191 } 1192 1193 static void hid_cancel_delayed_stuff(struct usbhid_device *usbhid) 1194 { 1195 del_timer_sync(&usbhid->io_retry); 1196 cancel_work_sync(&usbhid->restart_work); 1197 cancel_work_sync(&usbhid->reset_work); 1198 } 1199 1200 static void hid_cease_io(struct usbhid_device *usbhid) 1201 { 1202 del_timer(&usbhid->io_retry); 1203 usb_kill_urb(usbhid->urbin); 1204 usb_kill_urb(usbhid->urbctrl); 1205 usb_kill_urb(usbhid->urbout); 1206 } 1207 1208 /* Treat USB reset pretty much the same as suspend/resume */ 1209 static int hid_pre_reset(struct usb_interface *intf) 1210 { 1211 struct hid_device *hid = usb_get_intfdata(intf); 1212 struct usbhid_device *usbhid = hid->driver_data; 1213 1214 spin_lock_irq(&usbhid->lock); 1215 set_bit(HID_RESET_PENDING, &usbhid->iofl); 1216 spin_unlock_irq(&usbhid->lock); 1217 cancel_work_sync(&usbhid->restart_work); 1218 hid_cease_io(usbhid); 1219 1220 return 0; 1221 } 1222 1223 /* Same routine used for post_reset and reset_resume */ 1224 static int hid_post_reset(struct usb_interface *intf) 1225 { 1226 struct usb_device *dev = interface_to_usbdev (intf); 1227 struct hid_device *hid = usb_get_intfdata(intf); 1228 struct usbhid_device *usbhid = hid->driver_data; 1229 int status; 1230 1231 spin_lock_irq(&usbhid->lock); 1232 clear_bit(HID_RESET_PENDING, &usbhid->iofl); 1233 spin_unlock_irq(&usbhid->lock); 1234 hid_set_idle(dev, intf->cur_altsetting->desc.bInterfaceNumber, 0, 0); 1235 status = hid_start_in(hid); 1236 if (status < 0) 1237 hid_io_error(hid); 1238 usbhid_restart_queues(usbhid); 1239 1240 return 0; 1241 } 1242 1243 int usbhid_get_power(struct hid_device *hid) 1244 { 1245 struct usbhid_device *usbhid = hid->driver_data; 1246 1247 return usb_autopm_get_interface(usbhid->intf); 1248 } 1249 1250 void usbhid_put_power(struct hid_device *hid) 1251 { 1252 struct usbhid_device *usbhid = hid->driver_data; 1253 1254 usb_autopm_put_interface(usbhid->intf); 1255 } 1256 1257 1258 #ifdef CONFIG_PM 1259 static int hid_suspend(struct usb_interface *intf, pm_message_t message) 1260 { 1261 struct hid_device *hid = usb_get_intfdata(intf); 1262 struct usbhid_device *usbhid = hid->driver_data; 1263 struct usb_device *udev = interface_to_usbdev(intf); 1264 int status; 1265 1266 if (udev->auto_pm) { 1267 spin_lock_irq(&usbhid->lock); /* Sync with error handler */ 1268 if (!test_bit(HID_RESET_PENDING, &usbhid->iofl) 1269 && !test_bit(HID_CLEAR_HALT, &usbhid->iofl) 1270 && !test_bit(HID_OUT_RUNNING, &usbhid->iofl) 1271 && !test_bit(HID_CTRL_RUNNING, &usbhid->iofl) 1272 && !test_bit(HID_KEYS_PRESSED, &usbhid->iofl) 1273 && (!usbhid->ledcount || ignoreled)) 1274 { 1275 set_bit(HID_REPORTED_IDLE, &usbhid->iofl); 1276 spin_unlock_irq(&usbhid->lock); 1277 } else { 1278 usbhid_mark_busy(usbhid); 1279 spin_unlock_irq(&usbhid->lock); 1280 return -EBUSY; 1281 } 1282 1283 } else { 1284 spin_lock_irq(&usbhid->lock); 1285 set_bit(HID_REPORTED_IDLE, &usbhid->iofl); 1286 spin_unlock_irq(&usbhid->lock); 1287 if (usbhid_wait_io(hid) < 0) 1288 return -EIO; 1289 } 1290 1291 if (!ignoreled && udev->auto_pm) { 1292 spin_lock_irq(&usbhid->lock); 1293 if (test_bit(HID_LED_ON, &usbhid->iofl)) { 1294 spin_unlock_irq(&usbhid->lock); 1295 usbhid_mark_busy(usbhid); 1296 return -EBUSY; 1297 } 1298 spin_unlock_irq(&usbhid->lock); 1299 } 1300 1301 hid_cancel_delayed_stuff(usbhid); 1302 hid_cease_io(usbhid); 1303 1304 if (udev->auto_pm && test_bit(HID_KEYS_PRESSED, &usbhid->iofl)) { 1305 /* lost race against keypresses */ 1306 status = hid_start_in(hid); 1307 if (status < 0) 1308 hid_io_error(hid); 1309 usbhid_mark_busy(usbhid); 1310 return -EBUSY; 1311 } 1312 dev_dbg(&intf->dev, "suspend\n"); 1313 return 0; 1314 } 1315 1316 static int hid_resume(struct usb_interface *intf) 1317 { 1318 struct hid_device *hid = usb_get_intfdata (intf); 1319 struct usbhid_device *usbhid = hid->driver_data; 1320 int status; 1321 1322 if (!test_bit(HID_STARTED, &usbhid->iofl)) 1323 return 0; 1324 1325 clear_bit(HID_REPORTED_IDLE, &usbhid->iofl); 1326 usbhid_mark_busy(usbhid); 1327 1328 if (test_bit(HID_CLEAR_HALT, &usbhid->iofl) || 1329 test_bit(HID_RESET_PENDING, &usbhid->iofl)) 1330 schedule_work(&usbhid->reset_work); 1331 usbhid->retry_delay = 0; 1332 status = hid_start_in(hid); 1333 if (status < 0) 1334 hid_io_error(hid); 1335 usbhid_restart_queues(usbhid); 1336 1337 dev_dbg(&intf->dev, "resume status %d\n", status); 1338 return 0; 1339 } 1340 1341 static int hid_reset_resume(struct usb_interface *intf) 1342 { 1343 struct hid_device *hid = usb_get_intfdata(intf); 1344 struct usbhid_device *usbhid = hid->driver_data; 1345 1346 clear_bit(HID_REPORTED_IDLE, &usbhid->iofl); 1347 return hid_post_reset(intf); 1348 } 1349 1350 #endif /* CONFIG_PM */ 1351 1352 static struct usb_device_id hid_usb_ids [] = { 1353 { .match_flags = USB_DEVICE_ID_MATCH_INT_CLASS, 1354 .bInterfaceClass = USB_INTERFACE_CLASS_HID }, 1355 { } /* Terminating entry */ 1356 }; 1357 1358 MODULE_DEVICE_TABLE (usb, hid_usb_ids); 1359 1360 static struct usb_driver hid_driver = { 1361 .name = "usbhid", 1362 .probe = hid_probe, 1363 .disconnect = hid_disconnect, 1364 #ifdef CONFIG_PM 1365 .suspend = hid_suspend, 1366 .resume = hid_resume, 1367 .reset_resume = hid_reset_resume, 1368 #endif 1369 .pre_reset = hid_pre_reset, 1370 .post_reset = hid_post_reset, 1371 .id_table = hid_usb_ids, 1372 .supports_autosuspend = 1, 1373 }; 1374 1375 static const struct hid_device_id hid_usb_table[] = { 1376 { HID_USB_DEVICE(HID_ANY_ID, HID_ANY_ID) }, 1377 { } 1378 }; 1379 1380 static struct hid_driver hid_usb_driver = { 1381 .name = "generic-usb", 1382 .id_table = hid_usb_table, 1383 }; 1384 1385 static int __init hid_init(void) 1386 { 1387 int retval = -ENOMEM; 1388 1389 resumption_waker = create_freezeable_workqueue("usbhid_resumer"); 1390 if (!resumption_waker) 1391 goto no_queue; 1392 retval = hid_register_driver(&hid_usb_driver); 1393 if (retval) 1394 goto hid_register_fail; 1395 retval = usbhid_quirks_init(quirks_param); 1396 if (retval) 1397 goto usbhid_quirks_init_fail; 1398 retval = hiddev_init(); 1399 if (retval) 1400 goto hiddev_init_fail; 1401 retval = usb_register(&hid_driver); 1402 if (retval) 1403 goto usb_register_fail; 1404 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":" 1405 DRIVER_DESC "\n"); 1406 1407 return 0; 1408 usb_register_fail: 1409 hiddev_exit(); 1410 hiddev_init_fail: 1411 usbhid_quirks_exit(); 1412 usbhid_quirks_init_fail: 1413 hid_unregister_driver(&hid_usb_driver); 1414 hid_register_fail: 1415 destroy_workqueue(resumption_waker); 1416 no_queue: 1417 return retval; 1418 } 1419 1420 static void __exit hid_exit(void) 1421 { 1422 usb_deregister(&hid_driver); 1423 hiddev_exit(); 1424 usbhid_quirks_exit(); 1425 hid_unregister_driver(&hid_usb_driver); 1426 destroy_workqueue(resumption_waker); 1427 } 1428 1429 module_init(hid_init); 1430 module_exit(hid_exit); 1431 1432 MODULE_AUTHOR(DRIVER_AUTHOR); 1433 MODULE_DESCRIPTION(DRIVER_DESC); 1434 MODULE_LICENSE(DRIVER_LICENSE); 1435