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) 2006-2008 Jiri Kosina 8 * Copyright (c) 2007-2008 Oliver Neukum 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 void __usbhid_submit_report(struct hid_device *hid, struct hid_report *report, unsigned char dir) 493 { 494 int head; 495 struct usbhid_device *usbhid = hid->driver_data; 496 int len = ((report->size - 1) >> 3) + 1 + (report->id > 0); 497 498 if ((hid->quirks & HID_QUIRK_NOGET) && dir == USB_DIR_IN) 499 return; 500 501 if (usbhid->urbout && dir == USB_DIR_OUT && report->type == HID_OUTPUT_REPORT) { 502 if ((head = (usbhid->outhead + 1) & (HID_OUTPUT_FIFO_SIZE - 1)) == usbhid->outtail) { 503 dev_warn(&hid->dev, "output queue full\n"); 504 return; 505 } 506 507 usbhid->out[usbhid->outhead].raw_report = kmalloc(len, GFP_ATOMIC); 508 if (!usbhid->out[usbhid->outhead].raw_report) { 509 dev_warn(&hid->dev, "output queueing failed\n"); 510 return; 511 } 512 hid_output_report(report, usbhid->out[usbhid->outhead].raw_report); 513 usbhid->out[usbhid->outhead].report = report; 514 usbhid->outhead = head; 515 516 if (!test_and_set_bit(HID_OUT_RUNNING, &usbhid->iofl)) 517 if (hid_submit_out(hid)) 518 clear_bit(HID_OUT_RUNNING, &usbhid->iofl); 519 return; 520 } 521 522 if ((head = (usbhid->ctrlhead + 1) & (HID_CONTROL_FIFO_SIZE - 1)) == usbhid->ctrltail) { 523 dev_warn(&hid->dev, "control queue full\n"); 524 return; 525 } 526 527 if (dir == USB_DIR_OUT) { 528 usbhid->ctrl[usbhid->ctrlhead].raw_report = kmalloc(len, GFP_ATOMIC); 529 if (!usbhid->ctrl[usbhid->ctrlhead].raw_report) { 530 dev_warn(&hid->dev, "control queueing failed\n"); 531 return; 532 } 533 hid_output_report(report, usbhid->ctrl[usbhid->ctrlhead].raw_report); 534 } 535 usbhid->ctrl[usbhid->ctrlhead].report = report; 536 usbhid->ctrl[usbhid->ctrlhead].dir = dir; 537 usbhid->ctrlhead = head; 538 539 if (!test_and_set_bit(HID_CTRL_RUNNING, &usbhid->iofl)) 540 if (hid_submit_ctrl(hid)) 541 clear_bit(HID_CTRL_RUNNING, &usbhid->iofl); 542 } 543 544 void usbhid_submit_report(struct hid_device *hid, struct hid_report *report, unsigned char dir) 545 { 546 struct usbhid_device *usbhid = hid->driver_data; 547 unsigned long flags; 548 549 spin_lock_irqsave(&usbhid->lock, flags); 550 __usbhid_submit_report(hid, report, dir); 551 spin_unlock_irqrestore(&usbhid->lock, flags); 552 } 553 EXPORT_SYMBOL_GPL(usbhid_submit_report); 554 555 static int usb_hidinput_input_event(struct input_dev *dev, unsigned int type, unsigned int code, int value) 556 { 557 struct hid_device *hid = input_get_drvdata(dev); 558 struct usbhid_device *usbhid = hid->driver_data; 559 struct hid_field *field; 560 unsigned long flags; 561 int offset; 562 563 if (type == EV_FF) 564 return input_ff_event(dev, type, code, value); 565 566 if (type != EV_LED) 567 return -1; 568 569 if ((offset = hidinput_find_field(hid, type, code, &field)) == -1) { 570 dev_warn(&dev->dev, "event field not found\n"); 571 return -1; 572 } 573 574 hid_set_field(field, offset, value); 575 if (value) { 576 spin_lock_irqsave(&usbhid->lock, flags); 577 usbhid->ledcount++; 578 spin_unlock_irqrestore(&usbhid->lock, flags); 579 } else { 580 spin_lock_irqsave(&usbhid->lock, flags); 581 usbhid->ledcount--; 582 spin_unlock_irqrestore(&usbhid->lock, flags); 583 } 584 usbhid_submit_report(hid, field->report, USB_DIR_OUT); 585 586 return 0; 587 } 588 589 int usbhid_wait_io(struct hid_device *hid) 590 { 591 struct usbhid_device *usbhid = hid->driver_data; 592 593 if (!wait_event_timeout(usbhid->wait, 594 (!test_bit(HID_CTRL_RUNNING, &usbhid->iofl) && 595 !test_bit(HID_OUT_RUNNING, &usbhid->iofl)), 596 10*HZ)) { 597 dbg_hid("timeout waiting for ctrl or out queue to clear\n"); 598 return -1; 599 } 600 601 return 0; 602 } 603 604 static int hid_set_idle(struct usb_device *dev, int ifnum, int report, int idle) 605 { 606 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), 607 HID_REQ_SET_IDLE, USB_TYPE_CLASS | USB_RECIP_INTERFACE, (idle << 8) | report, 608 ifnum, NULL, 0, USB_CTRL_SET_TIMEOUT); 609 } 610 611 static int hid_get_class_descriptor(struct usb_device *dev, int ifnum, 612 unsigned char type, void *buf, int size) 613 { 614 int result, retries = 4; 615 616 memset(buf, 0, size); 617 618 do { 619 result = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), 620 USB_REQ_GET_DESCRIPTOR, USB_RECIP_INTERFACE | USB_DIR_IN, 621 (type << 8), ifnum, buf, size, USB_CTRL_GET_TIMEOUT); 622 retries--; 623 } while (result < size && retries); 624 return result; 625 } 626 627 int usbhid_open(struct hid_device *hid) 628 { 629 struct usbhid_device *usbhid = hid->driver_data; 630 int res; 631 632 mutex_lock(&hid_open_mut); 633 if (!hid->open++) { 634 res = usb_autopm_get_interface(usbhid->intf); 635 /* the device must be awake to reliable request remote wakeup */ 636 if (res < 0) { 637 hid->open--; 638 mutex_unlock(&hid_open_mut); 639 return -EIO; 640 } 641 usbhid->intf->needs_remote_wakeup = 1; 642 if (hid_start_in(hid)) 643 hid_io_error(hid); 644 645 usb_autopm_put_interface(usbhid->intf); 646 } 647 mutex_unlock(&hid_open_mut); 648 return 0; 649 } 650 651 void usbhid_close(struct hid_device *hid) 652 { 653 struct usbhid_device *usbhid = hid->driver_data; 654 655 mutex_lock(&hid_open_mut); 656 657 /* protecting hid->open to make sure we don't restart 658 * data acquistion due to a resumption we no longer 659 * care about 660 */ 661 spin_lock_irq(&usbhid->lock); 662 if (!--hid->open) { 663 spin_unlock_irq(&usbhid->lock); 664 hid_cancel_delayed_stuff(usbhid); 665 usb_kill_urb(usbhid->urbin); 666 usbhid->intf->needs_remote_wakeup = 0; 667 } else { 668 spin_unlock_irq(&usbhid->lock); 669 } 670 mutex_unlock(&hid_open_mut); 671 } 672 673 /* 674 * Initialize all reports 675 */ 676 677 void usbhid_init_reports(struct hid_device *hid) 678 { 679 struct hid_report *report; 680 struct usbhid_device *usbhid = hid->driver_data; 681 int err, ret; 682 683 list_for_each_entry(report, &hid->report_enum[HID_INPUT_REPORT].report_list, list) 684 usbhid_submit_report(hid, report, USB_DIR_IN); 685 686 list_for_each_entry(report, &hid->report_enum[HID_FEATURE_REPORT].report_list, list) 687 usbhid_submit_report(hid, report, USB_DIR_IN); 688 689 err = 0; 690 ret = usbhid_wait_io(hid); 691 while (ret) { 692 err |= ret; 693 if (test_bit(HID_CTRL_RUNNING, &usbhid->iofl)) 694 usb_kill_urb(usbhid->urbctrl); 695 if (test_bit(HID_OUT_RUNNING, &usbhid->iofl)) 696 usb_kill_urb(usbhid->urbout); 697 ret = usbhid_wait_io(hid); 698 } 699 700 if (err) 701 dev_warn(&hid->dev, "timeout initializing reports\n"); 702 } 703 704 /* 705 * Reset LEDs which BIOS might have left on. For now, just NumLock (0x01). 706 */ 707 static int hid_find_field_early(struct hid_device *hid, unsigned int page, 708 unsigned int hid_code, struct hid_field **pfield) 709 { 710 struct hid_report *report; 711 struct hid_field *field; 712 struct hid_usage *usage; 713 int i, j; 714 715 list_for_each_entry(report, &hid->report_enum[HID_OUTPUT_REPORT].report_list, list) { 716 for (i = 0; i < report->maxfield; i++) { 717 field = report->field[i]; 718 for (j = 0; j < field->maxusage; j++) { 719 usage = &field->usage[j]; 720 if ((usage->hid & HID_USAGE_PAGE) == page && 721 (usage->hid & 0xFFFF) == hid_code) { 722 *pfield = field; 723 return j; 724 } 725 } 726 } 727 } 728 return -1; 729 } 730 731 void usbhid_set_leds(struct hid_device *hid) 732 { 733 struct hid_field *field; 734 int offset; 735 736 if ((offset = hid_find_field_early(hid, HID_UP_LED, 0x01, &field)) != -1) { 737 hid_set_field(field, offset, 0); 738 usbhid_submit_report(hid, field->report, USB_DIR_OUT); 739 } 740 } 741 EXPORT_SYMBOL_GPL(usbhid_set_leds); 742 743 /* 744 * Traverse the supplied list of reports and find the longest 745 */ 746 static void hid_find_max_report(struct hid_device *hid, unsigned int type, 747 unsigned int *max) 748 { 749 struct hid_report *report; 750 unsigned int size; 751 752 list_for_each_entry(report, &hid->report_enum[type].report_list, list) { 753 size = ((report->size - 1) >> 3) + 1 + hid->report_enum[type].numbered; 754 if (*max < size) 755 *max = size; 756 } 757 } 758 759 static int hid_alloc_buffers(struct usb_device *dev, struct hid_device *hid) 760 { 761 struct usbhid_device *usbhid = hid->driver_data; 762 763 usbhid->inbuf = usb_buffer_alloc(dev, usbhid->bufsize, GFP_KERNEL, 764 &usbhid->inbuf_dma); 765 usbhid->outbuf = usb_buffer_alloc(dev, usbhid->bufsize, GFP_KERNEL, 766 &usbhid->outbuf_dma); 767 usbhid->cr = usb_buffer_alloc(dev, sizeof(*usbhid->cr), GFP_KERNEL, 768 &usbhid->cr_dma); 769 usbhid->ctrlbuf = usb_buffer_alloc(dev, usbhid->bufsize, GFP_KERNEL, 770 &usbhid->ctrlbuf_dma); 771 if (!usbhid->inbuf || !usbhid->outbuf || !usbhid->cr || 772 !usbhid->ctrlbuf) 773 return -1; 774 775 return 0; 776 } 777 778 static int usbhid_output_raw_report(struct hid_device *hid, __u8 *buf, size_t count) 779 { 780 struct usbhid_device *usbhid = hid->driver_data; 781 struct usb_device *dev = hid_to_usb_dev(hid); 782 struct usb_interface *intf = usbhid->intf; 783 struct usb_host_interface *interface = intf->cur_altsetting; 784 int ret; 785 786 ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), 787 HID_REQ_SET_REPORT, 788 USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE, 789 ((HID_OUTPUT_REPORT + 1) << 8) | *buf, 790 interface->desc.bInterfaceNumber, buf + 1, count - 1, 791 USB_CTRL_SET_TIMEOUT); 792 793 /* count also the report id */ 794 if (ret > 0) 795 ret++; 796 797 return ret; 798 } 799 800 static void usbhid_restart_queues(struct usbhid_device *usbhid) 801 { 802 if (usbhid->urbout) 803 usbhid_restart_out_queue(usbhid); 804 usbhid_restart_ctrl_queue(usbhid); 805 } 806 807 static void __usbhid_restart_queues(struct work_struct *work) 808 { 809 struct usbhid_device *usbhid = 810 container_of(work, struct usbhid_device, restart_work); 811 int r; 812 813 r = usb_autopm_get_interface(usbhid->intf); 814 if (r < 0) 815 return; 816 usb_autopm_put_interface(usbhid->intf); 817 } 818 819 static void hid_free_buffers(struct usb_device *dev, struct hid_device *hid) 820 { 821 struct usbhid_device *usbhid = hid->driver_data; 822 823 usb_buffer_free(dev, usbhid->bufsize, usbhid->inbuf, usbhid->inbuf_dma); 824 usb_buffer_free(dev, usbhid->bufsize, usbhid->outbuf, usbhid->outbuf_dma); 825 usb_buffer_free(dev, sizeof(*(usbhid->cr)), usbhid->cr, usbhid->cr_dma); 826 usb_buffer_free(dev, usbhid->bufsize, usbhid->ctrlbuf, usbhid->ctrlbuf_dma); 827 } 828 829 static int usbhid_parse(struct hid_device *hid) 830 { 831 struct usb_interface *intf = to_usb_interface(hid->dev.parent); 832 struct usb_host_interface *interface = intf->cur_altsetting; 833 struct usb_device *dev = interface_to_usbdev (intf); 834 struct hid_descriptor *hdesc; 835 u32 quirks = 0; 836 unsigned int rsize = 0; 837 char *rdesc; 838 int ret, n; 839 840 quirks = usbhid_lookup_quirk(le16_to_cpu(dev->descriptor.idVendor), 841 le16_to_cpu(dev->descriptor.idProduct)); 842 843 if (quirks & HID_QUIRK_IGNORE) 844 return -ENODEV; 845 846 /* Many keyboards and mice don't like to be polled for reports, 847 * so we will always set the HID_QUIRK_NOGET flag for them. */ 848 if (interface->desc.bInterfaceSubClass == USB_INTERFACE_SUBCLASS_BOOT) { 849 if (interface->desc.bInterfaceProtocol == USB_INTERFACE_PROTOCOL_KEYBOARD || 850 interface->desc.bInterfaceProtocol == USB_INTERFACE_PROTOCOL_MOUSE) 851 quirks |= HID_QUIRK_NOGET; 852 } 853 854 if (usb_get_extra_descriptor(interface, HID_DT_HID, &hdesc) && 855 (!interface->desc.bNumEndpoints || 856 usb_get_extra_descriptor(&interface->endpoint[0], HID_DT_HID, &hdesc))) { 857 dbg_hid("class descriptor not present\n"); 858 return -ENODEV; 859 } 860 861 hid->version = le16_to_cpu(hdesc->bcdHID); 862 hid->country = hdesc->bCountryCode; 863 864 for (n = 0; n < hdesc->bNumDescriptors; n++) 865 if (hdesc->desc[n].bDescriptorType == HID_DT_REPORT) 866 rsize = le16_to_cpu(hdesc->desc[n].wDescriptorLength); 867 868 if (!rsize || rsize > HID_MAX_DESCRIPTOR_SIZE) { 869 dbg_hid("weird size of report descriptor (%u)\n", rsize); 870 return -EINVAL; 871 } 872 873 if (!(rdesc = kmalloc(rsize, GFP_KERNEL))) { 874 dbg_hid("couldn't allocate rdesc memory\n"); 875 return -ENOMEM; 876 } 877 878 hid_set_idle(dev, interface->desc.bInterfaceNumber, 0, 0); 879 880 ret = hid_get_class_descriptor(dev, interface->desc.bInterfaceNumber, 881 HID_DT_REPORT, rdesc, rsize); 882 if (ret < 0) { 883 dbg_hid("reading report descriptor failed\n"); 884 kfree(rdesc); 885 goto err; 886 } 887 888 dbg_hid("report descriptor (size %u, read %d) = ", rsize, n); 889 for (n = 0; n < rsize; n++) 890 dbg_hid_line(" %02x", (unsigned char) rdesc[n]); 891 dbg_hid_line("\n"); 892 893 ret = hid_parse_report(hid, rdesc, rsize); 894 kfree(rdesc); 895 if (ret) { 896 dbg_hid("parsing report descriptor failed\n"); 897 goto err; 898 } 899 900 hid->quirks |= quirks; 901 902 return 0; 903 err: 904 return ret; 905 } 906 907 static int usbhid_start(struct hid_device *hid) 908 { 909 struct usb_interface *intf = to_usb_interface(hid->dev.parent); 910 struct usb_host_interface *interface = intf->cur_altsetting; 911 struct usb_device *dev = interface_to_usbdev(intf); 912 struct usbhid_device *usbhid = hid->driver_data; 913 unsigned int n, insize = 0; 914 int ret; 915 916 clear_bit(HID_DISCONNECTED, &usbhid->iofl); 917 918 usbhid->bufsize = HID_MIN_BUFFER_SIZE; 919 hid_find_max_report(hid, HID_INPUT_REPORT, &usbhid->bufsize); 920 hid_find_max_report(hid, HID_OUTPUT_REPORT, &usbhid->bufsize); 921 hid_find_max_report(hid, HID_FEATURE_REPORT, &usbhid->bufsize); 922 923 if (usbhid->bufsize > HID_MAX_BUFFER_SIZE) 924 usbhid->bufsize = HID_MAX_BUFFER_SIZE; 925 926 hid_find_max_report(hid, HID_INPUT_REPORT, &insize); 927 928 if (insize > HID_MAX_BUFFER_SIZE) 929 insize = HID_MAX_BUFFER_SIZE; 930 931 if (hid_alloc_buffers(dev, hid)) { 932 ret = -ENOMEM; 933 goto fail; 934 } 935 936 for (n = 0; n < interface->desc.bNumEndpoints; n++) { 937 struct usb_endpoint_descriptor *endpoint; 938 int pipe; 939 int interval; 940 941 endpoint = &interface->endpoint[n].desc; 942 if (!usb_endpoint_xfer_int(endpoint)) 943 continue; 944 945 interval = endpoint->bInterval; 946 947 /* Some vendors give fullspeed interval on highspeed devides */ 948 if (hid->quirks & HID_QUIRK_FULLSPEED_INTERVAL && 949 dev->speed == USB_SPEED_HIGH) { 950 interval = fls(endpoint->bInterval*8); 951 printk(KERN_INFO "%s: Fixing fullspeed to highspeed interval: %d -> %d\n", 952 hid->name, endpoint->bInterval, interval); 953 } 954 955 /* Change the polling interval of mice. */ 956 if (hid->collection->usage == HID_GD_MOUSE && hid_mousepoll_interval > 0) 957 interval = hid_mousepoll_interval; 958 959 ret = -ENOMEM; 960 if (usb_endpoint_dir_in(endpoint)) { 961 if (usbhid->urbin) 962 continue; 963 if (!(usbhid->urbin = usb_alloc_urb(0, GFP_KERNEL))) 964 goto fail; 965 pipe = usb_rcvintpipe(dev, endpoint->bEndpointAddress); 966 usb_fill_int_urb(usbhid->urbin, dev, pipe, usbhid->inbuf, insize, 967 hid_irq_in, hid, interval); 968 usbhid->urbin->transfer_dma = usbhid->inbuf_dma; 969 usbhid->urbin->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; 970 } else { 971 if (usbhid->urbout) 972 continue; 973 if (!(usbhid->urbout = usb_alloc_urb(0, GFP_KERNEL))) 974 goto fail; 975 pipe = usb_sndintpipe(dev, endpoint->bEndpointAddress); 976 usb_fill_int_urb(usbhid->urbout, dev, pipe, usbhid->outbuf, 0, 977 hid_irq_out, hid, interval); 978 usbhid->urbout->transfer_dma = usbhid->outbuf_dma; 979 usbhid->urbout->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; 980 } 981 } 982 983 init_waitqueue_head(&usbhid->wait); 984 INIT_WORK(&usbhid->reset_work, hid_reset); 985 INIT_WORK(&usbhid->restart_work, __usbhid_restart_queues); 986 setup_timer(&usbhid->io_retry, hid_retry_timeout, (unsigned long) hid); 987 988 spin_lock_init(&usbhid->lock); 989 spin_lock_init(&usbhid->lock); 990 991 usbhid->intf = intf; 992 usbhid->ifnum = interface->desc.bInterfaceNumber; 993 994 usbhid->urbctrl = usb_alloc_urb(0, GFP_KERNEL); 995 if (!usbhid->urbctrl) { 996 ret = -ENOMEM; 997 goto fail; 998 } 999 1000 usb_fill_control_urb(usbhid->urbctrl, dev, 0, (void *) usbhid->cr, 1001 usbhid->ctrlbuf, 1, hid_ctrl, hid); 1002 usbhid->urbctrl->setup_dma = usbhid->cr_dma; 1003 usbhid->urbctrl->transfer_dma = usbhid->ctrlbuf_dma; 1004 usbhid->urbctrl->transfer_flags |= (URB_NO_TRANSFER_DMA_MAP | URB_NO_SETUP_DMA_MAP); 1005 1006 usbhid_init_reports(hid); 1007 hid_dump_device(hid); 1008 1009 set_bit(HID_STARTED, &usbhid->iofl); 1010 1011 /* Some keyboards don't work until their LEDs have been set. 1012 * Since BIOSes do set the LEDs, it must be safe for any device 1013 * that supports the keyboard boot protocol. 1014 */ 1015 if (interface->desc.bInterfaceSubClass == USB_INTERFACE_SUBCLASS_BOOT && 1016 interface->desc.bInterfaceProtocol == 1017 USB_INTERFACE_PROTOCOL_KEYBOARD) 1018 usbhid_set_leds(hid); 1019 1020 return 0; 1021 1022 fail: 1023 usb_free_urb(usbhid->urbin); 1024 usb_free_urb(usbhid->urbout); 1025 usb_free_urb(usbhid->urbctrl); 1026 usbhid->urbin = NULL; 1027 usbhid->urbout = NULL; 1028 usbhid->urbctrl = NULL; 1029 hid_free_buffers(dev, hid); 1030 return ret; 1031 } 1032 1033 static void usbhid_stop(struct hid_device *hid) 1034 { 1035 struct usbhid_device *usbhid = hid->driver_data; 1036 1037 if (WARN_ON(!usbhid)) 1038 return; 1039 1040 clear_bit(HID_STARTED, &usbhid->iofl); 1041 spin_lock_irq(&usbhid->lock); /* Sync with error handler */ 1042 set_bit(HID_DISCONNECTED, &usbhid->iofl); 1043 spin_unlock_irq(&usbhid->lock); 1044 usb_kill_urb(usbhid->urbin); 1045 usb_kill_urb(usbhid->urbout); 1046 usb_kill_urb(usbhid->urbctrl); 1047 1048 hid_cancel_delayed_stuff(usbhid); 1049 1050 if (hid->claimed & HID_CLAIMED_INPUT) 1051 hidinput_disconnect(hid); 1052 if (hid->claimed & HID_CLAIMED_HIDDEV) 1053 hiddev_disconnect(hid); 1054 if (hid->claimed & HID_CLAIMED_HIDRAW) 1055 hidraw_disconnect(hid); 1056 1057 hid->claimed = 0; 1058 1059 usb_free_urb(usbhid->urbin); 1060 usb_free_urb(usbhid->urbctrl); 1061 usb_free_urb(usbhid->urbout); 1062 usbhid->urbin = NULL; /* don't mess up next start */ 1063 usbhid->urbctrl = NULL; 1064 usbhid->urbout = NULL; 1065 1066 hid_free_buffers(hid_to_usb_dev(hid), hid); 1067 } 1068 1069 static int usbhid_power(struct hid_device *hid, int lvl) 1070 { 1071 int r = 0; 1072 1073 switch (lvl) { 1074 case PM_HINT_FULLON: 1075 r = usbhid_get_power(hid); 1076 break; 1077 case PM_HINT_NORMAL: 1078 usbhid_put_power(hid); 1079 break; 1080 } 1081 return r; 1082 } 1083 1084 static struct hid_ll_driver usb_hid_driver = { 1085 .parse = usbhid_parse, 1086 .start = usbhid_start, 1087 .stop = usbhid_stop, 1088 .open = usbhid_open, 1089 .close = usbhid_close, 1090 .power = usbhid_power, 1091 .hidinput_input_event = usb_hidinput_input_event, 1092 }; 1093 1094 static int hid_probe(struct usb_interface *intf, const struct usb_device_id *id) 1095 { 1096 struct usb_host_interface *interface = intf->cur_altsetting; 1097 struct usb_device *dev = interface_to_usbdev(intf); 1098 struct usbhid_device *usbhid; 1099 struct hid_device *hid; 1100 unsigned int n, has_in = 0; 1101 size_t len; 1102 int ret; 1103 1104 dbg_hid("HID probe called for ifnum %d\n", 1105 intf->altsetting->desc.bInterfaceNumber); 1106 1107 for (n = 0; n < interface->desc.bNumEndpoints; n++) 1108 if (usb_endpoint_is_int_in(&interface->endpoint[n].desc)) 1109 has_in++; 1110 if (!has_in) { 1111 dev_err(&intf->dev, "couldn't find an input interrupt " 1112 "endpoint\n"); 1113 return -ENODEV; 1114 } 1115 1116 hid = hid_allocate_device(); 1117 if (IS_ERR(hid)) 1118 return PTR_ERR(hid); 1119 1120 usb_set_intfdata(intf, hid); 1121 hid->ll_driver = &usb_hid_driver; 1122 hid->hid_output_raw_report = usbhid_output_raw_report; 1123 hid->ff_init = hid_pidff_init; 1124 #ifdef CONFIG_USB_HIDDEV 1125 hid->hiddev_connect = hiddev_connect; 1126 hid->hiddev_hid_event = hiddev_hid_event; 1127 hid->hiddev_report_event = hiddev_report_event; 1128 #endif 1129 hid->dev.parent = &intf->dev; 1130 hid->bus = BUS_USB; 1131 hid->vendor = le16_to_cpu(dev->descriptor.idVendor); 1132 hid->product = le16_to_cpu(dev->descriptor.idProduct); 1133 hid->name[0] = 0; 1134 if (intf->cur_altsetting->desc.bInterfaceProtocol == 1135 USB_INTERFACE_PROTOCOL_MOUSE) 1136 hid->type = HID_TYPE_USBMOUSE; 1137 1138 if (dev->manufacturer) 1139 strlcpy(hid->name, dev->manufacturer, sizeof(hid->name)); 1140 1141 if (dev->product) { 1142 if (dev->manufacturer) 1143 strlcat(hid->name, " ", sizeof(hid->name)); 1144 strlcat(hid->name, dev->product, sizeof(hid->name)); 1145 } 1146 1147 if (!strlen(hid->name)) 1148 snprintf(hid->name, sizeof(hid->name), "HID %04x:%04x", 1149 le16_to_cpu(dev->descriptor.idVendor), 1150 le16_to_cpu(dev->descriptor.idProduct)); 1151 1152 usb_make_path(dev, hid->phys, sizeof(hid->phys)); 1153 strlcat(hid->phys, "/input", sizeof(hid->phys)); 1154 len = strlen(hid->phys); 1155 if (len < sizeof(hid->phys) - 1) 1156 snprintf(hid->phys + len, sizeof(hid->phys) - len, 1157 "%d", intf->altsetting[0].desc.bInterfaceNumber); 1158 1159 if (usb_string(dev, dev->descriptor.iSerialNumber, hid->uniq, 64) <= 0) 1160 hid->uniq[0] = 0; 1161 1162 usbhid = kzalloc(sizeof(*usbhid), GFP_KERNEL); 1163 if (usbhid == NULL) { 1164 ret = -ENOMEM; 1165 goto err; 1166 } 1167 1168 hid->driver_data = usbhid; 1169 usbhid->hid = hid; 1170 1171 ret = hid_add_device(hid); 1172 if (ret) { 1173 if (ret != -ENODEV) 1174 dev_err(&intf->dev, "can't add hid device: %d\n", ret); 1175 goto err_free; 1176 } 1177 1178 return 0; 1179 err_free: 1180 kfree(usbhid); 1181 err: 1182 hid_destroy_device(hid); 1183 return ret; 1184 } 1185 1186 static void hid_disconnect(struct usb_interface *intf) 1187 { 1188 struct hid_device *hid = usb_get_intfdata(intf); 1189 struct usbhid_device *usbhid; 1190 1191 if (WARN_ON(!hid)) 1192 return; 1193 1194 usbhid = hid->driver_data; 1195 hid_destroy_device(hid); 1196 kfree(usbhid); 1197 } 1198 1199 static void hid_cancel_delayed_stuff(struct usbhid_device *usbhid) 1200 { 1201 del_timer_sync(&usbhid->io_retry); 1202 cancel_work_sync(&usbhid->restart_work); 1203 cancel_work_sync(&usbhid->reset_work); 1204 } 1205 1206 static void hid_cease_io(struct usbhid_device *usbhid) 1207 { 1208 del_timer(&usbhid->io_retry); 1209 usb_kill_urb(usbhid->urbin); 1210 usb_kill_urb(usbhid->urbctrl); 1211 usb_kill_urb(usbhid->urbout); 1212 } 1213 1214 /* Treat USB reset pretty much the same as suspend/resume */ 1215 static int hid_pre_reset(struct usb_interface *intf) 1216 { 1217 struct hid_device *hid = usb_get_intfdata(intf); 1218 struct usbhid_device *usbhid = hid->driver_data; 1219 1220 spin_lock_irq(&usbhid->lock); 1221 set_bit(HID_RESET_PENDING, &usbhid->iofl); 1222 spin_unlock_irq(&usbhid->lock); 1223 cancel_work_sync(&usbhid->restart_work); 1224 hid_cease_io(usbhid); 1225 1226 return 0; 1227 } 1228 1229 /* Same routine used for post_reset and reset_resume */ 1230 static int hid_post_reset(struct usb_interface *intf) 1231 { 1232 struct usb_device *dev = interface_to_usbdev (intf); 1233 struct hid_device *hid = usb_get_intfdata(intf); 1234 struct usbhid_device *usbhid = hid->driver_data; 1235 int status; 1236 1237 spin_lock_irq(&usbhid->lock); 1238 clear_bit(HID_RESET_PENDING, &usbhid->iofl); 1239 spin_unlock_irq(&usbhid->lock); 1240 hid_set_idle(dev, intf->cur_altsetting->desc.bInterfaceNumber, 0, 0); 1241 status = hid_start_in(hid); 1242 if (status < 0) 1243 hid_io_error(hid); 1244 usbhid_restart_queues(usbhid); 1245 1246 return 0; 1247 } 1248 1249 int usbhid_get_power(struct hid_device *hid) 1250 { 1251 struct usbhid_device *usbhid = hid->driver_data; 1252 1253 return usb_autopm_get_interface(usbhid->intf); 1254 } 1255 1256 void usbhid_put_power(struct hid_device *hid) 1257 { 1258 struct usbhid_device *usbhid = hid->driver_data; 1259 1260 usb_autopm_put_interface(usbhid->intf); 1261 } 1262 1263 1264 #ifdef CONFIG_PM 1265 static int hid_suspend(struct usb_interface *intf, pm_message_t message) 1266 { 1267 struct hid_device *hid = usb_get_intfdata(intf); 1268 struct usbhid_device *usbhid = hid->driver_data; 1269 struct usb_device *udev = interface_to_usbdev(intf); 1270 int status; 1271 1272 if (udev->auto_pm) { 1273 spin_lock_irq(&usbhid->lock); /* Sync with error handler */ 1274 if (!test_bit(HID_RESET_PENDING, &usbhid->iofl) 1275 && !test_bit(HID_CLEAR_HALT, &usbhid->iofl) 1276 && !test_bit(HID_OUT_RUNNING, &usbhid->iofl) 1277 && !test_bit(HID_CTRL_RUNNING, &usbhid->iofl) 1278 && !test_bit(HID_KEYS_PRESSED, &usbhid->iofl) 1279 && (!usbhid->ledcount || ignoreled)) 1280 { 1281 set_bit(HID_REPORTED_IDLE, &usbhid->iofl); 1282 spin_unlock_irq(&usbhid->lock); 1283 } else { 1284 usbhid_mark_busy(usbhid); 1285 spin_unlock_irq(&usbhid->lock); 1286 return -EBUSY; 1287 } 1288 1289 } else { 1290 spin_lock_irq(&usbhid->lock); 1291 set_bit(HID_REPORTED_IDLE, &usbhid->iofl); 1292 spin_unlock_irq(&usbhid->lock); 1293 if (usbhid_wait_io(hid) < 0) 1294 return -EIO; 1295 } 1296 1297 if (!ignoreled && udev->auto_pm) { 1298 spin_lock_irq(&usbhid->lock); 1299 if (test_bit(HID_LED_ON, &usbhid->iofl)) { 1300 spin_unlock_irq(&usbhid->lock); 1301 usbhid_mark_busy(usbhid); 1302 return -EBUSY; 1303 } 1304 spin_unlock_irq(&usbhid->lock); 1305 } 1306 1307 hid_cancel_delayed_stuff(usbhid); 1308 hid_cease_io(usbhid); 1309 1310 if (udev->auto_pm && test_bit(HID_KEYS_PRESSED, &usbhid->iofl)) { 1311 /* lost race against keypresses */ 1312 status = hid_start_in(hid); 1313 if (status < 0) 1314 hid_io_error(hid); 1315 usbhid_mark_busy(usbhid); 1316 return -EBUSY; 1317 } 1318 dev_dbg(&intf->dev, "suspend\n"); 1319 return 0; 1320 } 1321 1322 static int hid_resume(struct usb_interface *intf) 1323 { 1324 struct hid_device *hid = usb_get_intfdata (intf); 1325 struct usbhid_device *usbhid = hid->driver_data; 1326 int status; 1327 1328 if (!test_bit(HID_STARTED, &usbhid->iofl)) 1329 return 0; 1330 1331 clear_bit(HID_REPORTED_IDLE, &usbhid->iofl); 1332 usbhid_mark_busy(usbhid); 1333 1334 if (test_bit(HID_CLEAR_HALT, &usbhid->iofl) || 1335 test_bit(HID_RESET_PENDING, &usbhid->iofl)) 1336 schedule_work(&usbhid->reset_work); 1337 usbhid->retry_delay = 0; 1338 status = hid_start_in(hid); 1339 if (status < 0) 1340 hid_io_error(hid); 1341 usbhid_restart_queues(usbhid); 1342 1343 dev_dbg(&intf->dev, "resume status %d\n", status); 1344 return 0; 1345 } 1346 1347 static int hid_reset_resume(struct usb_interface *intf) 1348 { 1349 struct hid_device *hid = usb_get_intfdata(intf); 1350 struct usbhid_device *usbhid = hid->driver_data; 1351 1352 clear_bit(HID_REPORTED_IDLE, &usbhid->iofl); 1353 return hid_post_reset(intf); 1354 } 1355 1356 #endif /* CONFIG_PM */ 1357 1358 static struct usb_device_id hid_usb_ids [] = { 1359 { .match_flags = USB_DEVICE_ID_MATCH_INT_CLASS, 1360 .bInterfaceClass = USB_INTERFACE_CLASS_HID }, 1361 { } /* Terminating entry */ 1362 }; 1363 1364 MODULE_DEVICE_TABLE (usb, hid_usb_ids); 1365 1366 static struct usb_driver hid_driver = { 1367 .name = "usbhid", 1368 .probe = hid_probe, 1369 .disconnect = hid_disconnect, 1370 #ifdef CONFIG_PM 1371 .suspend = hid_suspend, 1372 .resume = hid_resume, 1373 .reset_resume = hid_reset_resume, 1374 #endif 1375 .pre_reset = hid_pre_reset, 1376 .post_reset = hid_post_reset, 1377 .id_table = hid_usb_ids, 1378 .supports_autosuspend = 1, 1379 }; 1380 1381 static const struct hid_device_id hid_usb_table[] = { 1382 { HID_USB_DEVICE(HID_ANY_ID, HID_ANY_ID) }, 1383 { } 1384 }; 1385 1386 static struct hid_driver hid_usb_driver = { 1387 .name = "generic-usb", 1388 .id_table = hid_usb_table, 1389 }; 1390 1391 static int __init hid_init(void) 1392 { 1393 int retval = -ENOMEM; 1394 1395 resumption_waker = create_freezeable_workqueue("usbhid_resumer"); 1396 if (!resumption_waker) 1397 goto no_queue; 1398 retval = hid_register_driver(&hid_usb_driver); 1399 if (retval) 1400 goto hid_register_fail; 1401 retval = usbhid_quirks_init(quirks_param); 1402 if (retval) 1403 goto usbhid_quirks_init_fail; 1404 retval = hiddev_init(); 1405 if (retval) 1406 goto hiddev_init_fail; 1407 retval = usb_register(&hid_driver); 1408 if (retval) 1409 goto usb_register_fail; 1410 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":" 1411 DRIVER_DESC "\n"); 1412 1413 return 0; 1414 usb_register_fail: 1415 hiddev_exit(); 1416 hiddev_init_fail: 1417 usbhid_quirks_exit(); 1418 usbhid_quirks_init_fail: 1419 hid_unregister_driver(&hid_usb_driver); 1420 hid_register_fail: 1421 destroy_workqueue(resumption_waker); 1422 no_queue: 1423 return retval; 1424 } 1425 1426 static void __exit hid_exit(void) 1427 { 1428 usb_deregister(&hid_driver); 1429 hiddev_exit(); 1430 usbhid_quirks_exit(); 1431 hid_unregister_driver(&hid_usb_driver); 1432 destroy_workqueue(resumption_waker); 1433 } 1434 1435 module_init(hid_init); 1436 module_exit(hid_exit); 1437 1438 MODULE_AUTHOR(DRIVER_AUTHOR); 1439 MODULE_DESCRIPTION(DRIVER_DESC); 1440 MODULE_LICENSE(DRIVER_LICENSE); 1441