1 /*****************************************************************************/ 2 3 /* 4 * devio.c -- User space communication with USB devices. 5 * 6 * Copyright (C) 1999-2000 Thomas Sailer (sailer@ife.ee.ethz.ch) 7 * 8 * This program is free software; you can redistribute it and/or modify 9 * it under the terms of the GNU General Public License as published by 10 * the Free Software Foundation; either version 2 of the License, or 11 * (at your option) any later version. 12 * 13 * This program is distributed in the hope that it will be useful, 14 * but WITHOUT ANY WARRANTY; without even the implied warranty of 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 * GNU General Public License for more details. 17 * 18 * You should have received a copy of the GNU General Public License 19 * along with this program; if not, write to the Free Software 20 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 21 * 22 * $Id: devio.c,v 1.7 2000/02/01 17:28:48 fliegl Exp $ 23 * 24 * This file implements the usbfs/x/y files, where 25 * x is the bus number and y the device number. 26 * 27 * It allows user space programs/"drivers" to communicate directly 28 * with USB devices without intervening kernel driver. 29 * 30 * Revision history 31 * 22.12.1999 0.1 Initial release (split from proc_usb.c) 32 * 04.01.2000 0.2 Turned into its own filesystem 33 */ 34 35 /*****************************************************************************/ 36 37 #include <linux/fs.h> 38 #include <linux/mm.h> 39 #include <linux/slab.h> 40 #include <linux/smp_lock.h> 41 #include <linux/signal.h> 42 #include <linux/poll.h> 43 #include <linux/module.h> 44 #include <linux/usb.h> 45 #include <linux/usbdevice_fs.h> 46 #include <asm/uaccess.h> 47 #include <asm/byteorder.h> 48 #include <linux/moduleparam.h> 49 50 #include "hcd.h" /* for usbcore internals */ 51 #include "usb.h" 52 53 struct async { 54 struct list_head asynclist; 55 struct dev_state *ps; 56 struct task_struct *task; 57 unsigned int signr; 58 unsigned int ifnum; 59 void __user *userbuffer; 60 void __user *userurb; 61 struct urb *urb; 62 }; 63 64 static int usbfs_snoop = 0; 65 module_param (usbfs_snoop, bool, S_IRUGO | S_IWUSR); 66 MODULE_PARM_DESC (usbfs_snoop, "true to log all usbfs traffic"); 67 68 #define snoop(dev, format, arg...) \ 69 do { \ 70 if (usbfs_snoop) \ 71 dev_info( dev , format , ## arg); \ 72 } while (0) 73 74 75 #define MAX_USBFS_BUFFER_SIZE 16384 76 77 static inline int connected (struct usb_device *dev) 78 { 79 return dev->state != USB_STATE_NOTATTACHED; 80 } 81 82 static loff_t usbdev_lseek(struct file *file, loff_t offset, int orig) 83 { 84 loff_t ret; 85 86 lock_kernel(); 87 88 switch (orig) { 89 case 0: 90 file->f_pos = offset; 91 ret = file->f_pos; 92 break; 93 case 1: 94 file->f_pos += offset; 95 ret = file->f_pos; 96 break; 97 case 2: 98 default: 99 ret = -EINVAL; 100 } 101 102 unlock_kernel(); 103 return ret; 104 } 105 106 static ssize_t usbdev_read(struct file *file, char __user *buf, size_t nbytes, loff_t *ppos) 107 { 108 struct dev_state *ps = (struct dev_state *)file->private_data; 109 struct usb_device *dev = ps->dev; 110 ssize_t ret = 0; 111 unsigned len; 112 loff_t pos; 113 int i; 114 115 pos = *ppos; 116 usb_lock_device(dev); 117 if (!connected(dev)) { 118 ret = -ENODEV; 119 goto err; 120 } else if (pos < 0) { 121 ret = -EINVAL; 122 goto err; 123 } 124 125 if (pos < sizeof(struct usb_device_descriptor)) { 126 struct usb_device_descriptor *desc = kmalloc(sizeof(*desc), GFP_KERNEL); 127 if (!desc) { 128 ret = -ENOMEM; 129 goto err; 130 } 131 memcpy(desc, &dev->descriptor, sizeof(dev->descriptor)); 132 le16_to_cpus(&desc->bcdUSB); 133 le16_to_cpus(&desc->idVendor); 134 le16_to_cpus(&desc->idProduct); 135 le16_to_cpus(&desc->bcdDevice); 136 137 len = sizeof(struct usb_device_descriptor) - pos; 138 if (len > nbytes) 139 len = nbytes; 140 if (copy_to_user(buf, ((char *)desc) + pos, len)) { 141 kfree(desc); 142 ret = -EFAULT; 143 goto err; 144 } 145 kfree(desc); 146 147 *ppos += len; 148 buf += len; 149 nbytes -= len; 150 ret += len; 151 } 152 153 pos = sizeof(struct usb_device_descriptor); 154 for (i = 0; nbytes && i < dev->descriptor.bNumConfigurations; i++) { 155 struct usb_config_descriptor *config = 156 (struct usb_config_descriptor *)dev->rawdescriptors[i]; 157 unsigned int length = le16_to_cpu(config->wTotalLength); 158 159 if (*ppos < pos + length) { 160 161 /* The descriptor may claim to be longer than it 162 * really is. Here is the actual allocated length. */ 163 unsigned alloclen = 164 le16_to_cpu(dev->config[i].desc.wTotalLength); 165 166 len = length - (*ppos - pos); 167 if (len > nbytes) 168 len = nbytes; 169 170 /* Simply don't write (skip over) unallocated parts */ 171 if (alloclen > (*ppos - pos)) { 172 alloclen -= (*ppos - pos); 173 if (copy_to_user(buf, 174 dev->rawdescriptors[i] + (*ppos - pos), 175 min(len, alloclen))) { 176 ret = -EFAULT; 177 goto err; 178 } 179 } 180 181 *ppos += len; 182 buf += len; 183 nbytes -= len; 184 ret += len; 185 } 186 187 pos += length; 188 } 189 190 err: 191 usb_unlock_device(dev); 192 return ret; 193 } 194 195 /* 196 * async list handling 197 */ 198 199 static struct async *alloc_async(unsigned int numisoframes) 200 { 201 unsigned int assize = sizeof(struct async) + numisoframes * sizeof(struct usb_iso_packet_descriptor); 202 struct async *as = kmalloc(assize, GFP_KERNEL); 203 if (!as) 204 return NULL; 205 memset(as, 0, assize); 206 as->urb = usb_alloc_urb(numisoframes, GFP_KERNEL); 207 if (!as->urb) { 208 kfree(as); 209 return NULL; 210 } 211 return as; 212 } 213 214 static void free_async(struct async *as) 215 { 216 kfree(as->urb->transfer_buffer); 217 kfree(as->urb->setup_packet); 218 usb_free_urb(as->urb); 219 kfree(as); 220 } 221 222 static inline void async_newpending(struct async *as) 223 { 224 struct dev_state *ps = as->ps; 225 unsigned long flags; 226 227 spin_lock_irqsave(&ps->lock, flags); 228 list_add_tail(&as->asynclist, &ps->async_pending); 229 spin_unlock_irqrestore(&ps->lock, flags); 230 } 231 232 static inline void async_removepending(struct async *as) 233 { 234 struct dev_state *ps = as->ps; 235 unsigned long flags; 236 237 spin_lock_irqsave(&ps->lock, flags); 238 list_del_init(&as->asynclist); 239 spin_unlock_irqrestore(&ps->lock, flags); 240 } 241 242 static inline struct async *async_getcompleted(struct dev_state *ps) 243 { 244 unsigned long flags; 245 struct async *as = NULL; 246 247 spin_lock_irqsave(&ps->lock, flags); 248 if (!list_empty(&ps->async_completed)) { 249 as = list_entry(ps->async_completed.next, struct async, asynclist); 250 list_del_init(&as->asynclist); 251 } 252 spin_unlock_irqrestore(&ps->lock, flags); 253 return as; 254 } 255 256 static inline struct async *async_getpending(struct dev_state *ps, void __user *userurb) 257 { 258 unsigned long flags; 259 struct async *as; 260 261 spin_lock_irqsave(&ps->lock, flags); 262 list_for_each_entry(as, &ps->async_pending, asynclist) 263 if (as->userurb == userurb) { 264 list_del_init(&as->asynclist); 265 spin_unlock_irqrestore(&ps->lock, flags); 266 return as; 267 } 268 spin_unlock_irqrestore(&ps->lock, flags); 269 return NULL; 270 } 271 272 static void async_completed(struct urb *urb, struct pt_regs *regs) 273 { 274 struct async *as = (struct async *)urb->context; 275 struct dev_state *ps = as->ps; 276 struct siginfo sinfo; 277 278 spin_lock(&ps->lock); 279 list_move_tail(&as->asynclist, &ps->async_completed); 280 spin_unlock(&ps->lock); 281 if (as->signr) { 282 sinfo.si_signo = as->signr; 283 sinfo.si_errno = as->urb->status; 284 sinfo.si_code = SI_ASYNCIO; 285 sinfo.si_addr = as->userurb; 286 send_sig_info(as->signr, &sinfo, as->task); 287 } 288 wake_up(&ps->wait); 289 } 290 291 static void destroy_async (struct dev_state *ps, struct list_head *list) 292 { 293 struct async *as; 294 unsigned long flags; 295 296 spin_lock_irqsave(&ps->lock, flags); 297 while (!list_empty(list)) { 298 as = list_entry(list->next, struct async, asynclist); 299 list_del_init(&as->asynclist); 300 301 /* drop the spinlock so the completion handler can run */ 302 spin_unlock_irqrestore(&ps->lock, flags); 303 usb_kill_urb(as->urb); 304 spin_lock_irqsave(&ps->lock, flags); 305 } 306 spin_unlock_irqrestore(&ps->lock, flags); 307 as = async_getcompleted(ps); 308 while (as) { 309 free_async(as); 310 as = async_getcompleted(ps); 311 } 312 } 313 314 static void destroy_async_on_interface (struct dev_state *ps, unsigned int ifnum) 315 { 316 struct list_head *p, *q, hitlist; 317 unsigned long flags; 318 319 INIT_LIST_HEAD(&hitlist); 320 spin_lock_irqsave(&ps->lock, flags); 321 list_for_each_safe(p, q, &ps->async_pending) 322 if (ifnum == list_entry(p, struct async, asynclist)->ifnum) 323 list_move_tail(p, &hitlist); 324 spin_unlock_irqrestore(&ps->lock, flags); 325 destroy_async(ps, &hitlist); 326 } 327 328 static inline void destroy_all_async(struct dev_state *ps) 329 { 330 destroy_async(ps, &ps->async_pending); 331 } 332 333 /* 334 * interface claims are made only at the request of user level code, 335 * which can also release them (explicitly or by closing files). 336 * they're also undone when devices disconnect. 337 */ 338 339 static int driver_probe (struct usb_interface *intf, 340 const struct usb_device_id *id) 341 { 342 return -ENODEV; 343 } 344 345 static void driver_disconnect(struct usb_interface *intf) 346 { 347 struct dev_state *ps = usb_get_intfdata (intf); 348 unsigned int ifnum = intf->altsetting->desc.bInterfaceNumber; 349 350 if (!ps) 351 return; 352 353 /* NOTE: this relies on usbcore having canceled and completed 354 * all pending I/O requests; 2.6 does that. 355 */ 356 357 if (likely(ifnum < 8*sizeof(ps->ifclaimed))) 358 clear_bit(ifnum, &ps->ifclaimed); 359 else 360 warn("interface number %u out of range", ifnum); 361 362 usb_set_intfdata (intf, NULL); 363 364 /* force async requests to complete */ 365 destroy_async_on_interface(ps, ifnum); 366 } 367 368 struct usb_driver usbfs_driver = { 369 .owner = THIS_MODULE, 370 .name = "usbfs", 371 .probe = driver_probe, 372 .disconnect = driver_disconnect, 373 }; 374 375 static int claimintf(struct dev_state *ps, unsigned int ifnum) 376 { 377 struct usb_device *dev = ps->dev; 378 struct usb_interface *intf; 379 int err; 380 381 if (ifnum >= 8*sizeof(ps->ifclaimed)) 382 return -EINVAL; 383 /* already claimed */ 384 if (test_bit(ifnum, &ps->ifclaimed)) 385 return 0; 386 387 /* lock against other changes to driver bindings */ 388 down_write(&usb_bus_type.subsys.rwsem); 389 intf = usb_ifnum_to_if(dev, ifnum); 390 if (!intf) 391 err = -ENOENT; 392 else 393 err = usb_driver_claim_interface(&usbfs_driver, intf, ps); 394 up_write(&usb_bus_type.subsys.rwsem); 395 if (err == 0) 396 set_bit(ifnum, &ps->ifclaimed); 397 return err; 398 } 399 400 static int releaseintf(struct dev_state *ps, unsigned int ifnum) 401 { 402 struct usb_device *dev; 403 struct usb_interface *intf; 404 int err; 405 406 err = -EINVAL; 407 if (ifnum >= 8*sizeof(ps->ifclaimed)) 408 return err; 409 dev = ps->dev; 410 /* lock against other changes to driver bindings */ 411 down_write(&usb_bus_type.subsys.rwsem); 412 intf = usb_ifnum_to_if(dev, ifnum); 413 if (!intf) 414 err = -ENOENT; 415 else if (test_and_clear_bit(ifnum, &ps->ifclaimed)) { 416 usb_driver_release_interface(&usbfs_driver, intf); 417 err = 0; 418 } 419 up_write(&usb_bus_type.subsys.rwsem); 420 return err; 421 } 422 423 static int checkintf(struct dev_state *ps, unsigned int ifnum) 424 { 425 if (ps->dev->state != USB_STATE_CONFIGURED) 426 return -EHOSTUNREACH; 427 if (ifnum >= 8*sizeof(ps->ifclaimed)) 428 return -EINVAL; 429 if (test_bit(ifnum, &ps->ifclaimed)) 430 return 0; 431 /* if not yet claimed, claim it for the driver */ 432 dev_warn(&ps->dev->dev, "usbfs: process %d (%s) did not claim interface %u before use\n", 433 current->pid, current->comm, ifnum); 434 return claimintf(ps, ifnum); 435 } 436 437 static int findintfep(struct usb_device *dev, unsigned int ep) 438 { 439 unsigned int i, j, e; 440 struct usb_interface *intf; 441 struct usb_host_interface *alts; 442 struct usb_endpoint_descriptor *endpt; 443 444 if (ep & ~(USB_DIR_IN|0xf)) 445 return -EINVAL; 446 if (!dev->actconfig) 447 return -ESRCH; 448 for (i = 0; i < dev->actconfig->desc.bNumInterfaces; i++) { 449 intf = dev->actconfig->interface[i]; 450 for (j = 0; j < intf->num_altsetting; j++) { 451 alts = &intf->altsetting[j]; 452 for (e = 0; e < alts->desc.bNumEndpoints; e++) { 453 endpt = &alts->endpoint[e].desc; 454 if (endpt->bEndpointAddress == ep) 455 return alts->desc.bInterfaceNumber; 456 } 457 } 458 } 459 return -ENOENT; 460 } 461 462 static int check_ctrlrecip(struct dev_state *ps, unsigned int requesttype, unsigned int index) 463 { 464 int ret = 0; 465 466 if (ps->dev->state != USB_STATE_CONFIGURED) 467 return -EHOSTUNREACH; 468 if (USB_TYPE_VENDOR == (USB_TYPE_MASK & requesttype)) 469 return 0; 470 471 index &= 0xff; 472 switch (requesttype & USB_RECIP_MASK) { 473 case USB_RECIP_ENDPOINT: 474 if ((ret = findintfep(ps->dev, index)) >= 0) 475 ret = checkintf(ps, ret); 476 break; 477 478 case USB_RECIP_INTERFACE: 479 ret = checkintf(ps, index); 480 break; 481 } 482 return ret; 483 } 484 485 /* 486 * file operations 487 */ 488 static int usbdev_open(struct inode *inode, struct file *file) 489 { 490 struct usb_device *dev; 491 struct dev_state *ps; 492 int ret; 493 494 /* 495 * no locking necessary here, as chrdev_open has the kernel lock 496 * (still acquire the kernel lock for safety) 497 */ 498 ret = -ENOMEM; 499 if (!(ps = kmalloc(sizeof(struct dev_state), GFP_KERNEL))) 500 goto out_nolock; 501 502 lock_kernel(); 503 ret = -ENOENT; 504 dev = usb_get_dev(inode->u.generic_ip); 505 if (!dev) { 506 kfree(ps); 507 goto out; 508 } 509 ret = 0; 510 ps->dev = dev; 511 ps->file = file; 512 spin_lock_init(&ps->lock); 513 INIT_LIST_HEAD(&ps->async_pending); 514 INIT_LIST_HEAD(&ps->async_completed); 515 init_waitqueue_head(&ps->wait); 516 ps->discsignr = 0; 517 ps->disctask = current; 518 ps->disccontext = NULL; 519 ps->ifclaimed = 0; 520 wmb(); 521 list_add_tail(&ps->list, &dev->filelist); 522 file->private_data = ps; 523 out: 524 unlock_kernel(); 525 out_nolock: 526 return ret; 527 } 528 529 static int usbdev_release(struct inode *inode, struct file *file) 530 { 531 struct dev_state *ps = (struct dev_state *)file->private_data; 532 struct usb_device *dev = ps->dev; 533 unsigned int ifnum; 534 535 usb_lock_device(dev); 536 list_del_init(&ps->list); 537 for (ifnum = 0; ps->ifclaimed && ifnum < 8*sizeof(ps->ifclaimed); 538 ifnum++) { 539 if (test_bit(ifnum, &ps->ifclaimed)) 540 releaseintf(ps, ifnum); 541 } 542 destroy_all_async(ps); 543 usb_unlock_device(dev); 544 usb_put_dev(dev); 545 ps->dev = NULL; 546 kfree(ps); 547 return 0; 548 } 549 550 static int proc_control(struct dev_state *ps, void __user *arg) 551 { 552 struct usb_device *dev = ps->dev; 553 struct usbdevfs_ctrltransfer ctrl; 554 unsigned int tmo; 555 unsigned char *tbuf; 556 int i, j, ret; 557 558 if (copy_from_user(&ctrl, arg, sizeof(ctrl))) 559 return -EFAULT; 560 if ((ret = check_ctrlrecip(ps, ctrl.bRequestType, ctrl.wIndex))) 561 return ret; 562 if (ctrl.wLength > PAGE_SIZE) 563 return -EINVAL; 564 if (!(tbuf = (unsigned char *)__get_free_page(GFP_KERNEL))) 565 return -ENOMEM; 566 tmo = ctrl.timeout; 567 if (ctrl.bRequestType & 0x80) { 568 if (ctrl.wLength && !access_ok(VERIFY_WRITE, ctrl.data, ctrl.wLength)) { 569 free_page((unsigned long)tbuf); 570 return -EINVAL; 571 } 572 snoop(&dev->dev, "control read: bRequest=%02x bRrequestType=%02x wValue=%04x wIndex=%04x\n", 573 ctrl.bRequest, ctrl.bRequestType, ctrl.wValue, ctrl.wIndex); 574 575 usb_unlock_device(dev); 576 i = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), ctrl.bRequest, ctrl.bRequestType, 577 ctrl.wValue, ctrl.wIndex, tbuf, ctrl.wLength, tmo); 578 usb_lock_device(dev); 579 if ((i > 0) && ctrl.wLength) { 580 if (usbfs_snoop) { 581 dev_info(&dev->dev, "control read: data "); 582 for (j = 0; j < ctrl.wLength; ++j) 583 printk ("%02x ", (unsigned char)(tbuf)[j]); 584 printk("\n"); 585 } 586 if (copy_to_user(ctrl.data, tbuf, ctrl.wLength)) { 587 free_page((unsigned long)tbuf); 588 return -EFAULT; 589 } 590 } 591 } else { 592 if (ctrl.wLength) { 593 if (copy_from_user(tbuf, ctrl.data, ctrl.wLength)) { 594 free_page((unsigned long)tbuf); 595 return -EFAULT; 596 } 597 } 598 snoop(&dev->dev, "control write: bRequest=%02x bRrequestType=%02x wValue=%04x wIndex=%04x\n", 599 ctrl.bRequest, ctrl.bRequestType, ctrl.wValue, ctrl.wIndex); 600 if (usbfs_snoop) { 601 dev_info(&dev->dev, "control write: data: "); 602 for (j = 0; j < ctrl.wLength; ++j) 603 printk ("%02x ", (unsigned char)(tbuf)[j]); 604 printk("\n"); 605 } 606 usb_unlock_device(dev); 607 i = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), ctrl.bRequest, ctrl.bRequestType, 608 ctrl.wValue, ctrl.wIndex, tbuf, ctrl.wLength, tmo); 609 usb_lock_device(dev); 610 } 611 free_page((unsigned long)tbuf); 612 if (i<0 && i != -EPIPE) { 613 dev_printk(KERN_DEBUG, &dev->dev, "usbfs: USBDEVFS_CONTROL " 614 "failed cmd %s rqt %u rq %u len %u ret %d\n", 615 current->comm, ctrl.bRequestType, ctrl.bRequest, 616 ctrl.wLength, i); 617 } 618 return i; 619 } 620 621 static int proc_bulk(struct dev_state *ps, void __user *arg) 622 { 623 struct usb_device *dev = ps->dev; 624 struct usbdevfs_bulktransfer bulk; 625 unsigned int tmo, len1, pipe; 626 int len2; 627 unsigned char *tbuf; 628 int i, ret; 629 630 if (copy_from_user(&bulk, arg, sizeof(bulk))) 631 return -EFAULT; 632 if ((ret = findintfep(ps->dev, bulk.ep)) < 0) 633 return ret; 634 if ((ret = checkintf(ps, ret))) 635 return ret; 636 if (bulk.ep & USB_DIR_IN) 637 pipe = usb_rcvbulkpipe(dev, bulk.ep & 0x7f); 638 else 639 pipe = usb_sndbulkpipe(dev, bulk.ep & 0x7f); 640 if (!usb_maxpacket(dev, pipe, !(bulk.ep & USB_DIR_IN))) 641 return -EINVAL; 642 len1 = bulk.len; 643 if (len1 > MAX_USBFS_BUFFER_SIZE) 644 return -EINVAL; 645 if (!(tbuf = kmalloc(len1, GFP_KERNEL))) 646 return -ENOMEM; 647 tmo = bulk.timeout; 648 if (bulk.ep & 0x80) { 649 if (len1 && !access_ok(VERIFY_WRITE, bulk.data, len1)) { 650 kfree(tbuf); 651 return -EINVAL; 652 } 653 usb_unlock_device(dev); 654 i = usb_bulk_msg(dev, pipe, tbuf, len1, &len2, tmo); 655 usb_lock_device(dev); 656 if (!i && len2) { 657 if (copy_to_user(bulk.data, tbuf, len2)) { 658 kfree(tbuf); 659 return -EFAULT; 660 } 661 } 662 } else { 663 if (len1) { 664 if (copy_from_user(tbuf, bulk.data, len1)) { 665 kfree(tbuf); 666 return -EFAULT; 667 } 668 } 669 usb_unlock_device(dev); 670 i = usb_bulk_msg(dev, pipe, tbuf, len1, &len2, tmo); 671 usb_lock_device(dev); 672 } 673 kfree(tbuf); 674 if (i < 0) 675 return i; 676 return len2; 677 } 678 679 static int proc_resetep(struct dev_state *ps, void __user *arg) 680 { 681 unsigned int ep; 682 int ret; 683 684 if (get_user(ep, (unsigned int __user *)arg)) 685 return -EFAULT; 686 if ((ret = findintfep(ps->dev, ep)) < 0) 687 return ret; 688 if ((ret = checkintf(ps, ret))) 689 return ret; 690 usb_settoggle(ps->dev, ep & 0xf, !(ep & USB_DIR_IN), 0); 691 return 0; 692 } 693 694 static int proc_clearhalt(struct dev_state *ps, void __user *arg) 695 { 696 unsigned int ep; 697 int pipe; 698 int ret; 699 700 if (get_user(ep, (unsigned int __user *)arg)) 701 return -EFAULT; 702 if ((ret = findintfep(ps->dev, ep)) < 0) 703 return ret; 704 if ((ret = checkintf(ps, ret))) 705 return ret; 706 if (ep & USB_DIR_IN) 707 pipe = usb_rcvbulkpipe(ps->dev, ep & 0x7f); 708 else 709 pipe = usb_sndbulkpipe(ps->dev, ep & 0x7f); 710 711 return usb_clear_halt(ps->dev, pipe); 712 } 713 714 715 static int proc_getdriver(struct dev_state *ps, void __user *arg) 716 { 717 struct usbdevfs_getdriver gd; 718 struct usb_interface *intf; 719 int ret; 720 721 if (copy_from_user(&gd, arg, sizeof(gd))) 722 return -EFAULT; 723 down_read(&usb_bus_type.subsys.rwsem); 724 intf = usb_ifnum_to_if(ps->dev, gd.interface); 725 if (!intf || !intf->dev.driver) 726 ret = -ENODATA; 727 else { 728 strncpy(gd.driver, intf->dev.driver->name, 729 sizeof(gd.driver)); 730 ret = (copy_to_user(arg, &gd, sizeof(gd)) ? -EFAULT : 0); 731 } 732 up_read(&usb_bus_type.subsys.rwsem); 733 return ret; 734 } 735 736 static int proc_connectinfo(struct dev_state *ps, void __user *arg) 737 { 738 struct usbdevfs_connectinfo ci; 739 740 ci.devnum = ps->dev->devnum; 741 ci.slow = ps->dev->speed == USB_SPEED_LOW; 742 if (copy_to_user(arg, &ci, sizeof(ci))) 743 return -EFAULT; 744 return 0; 745 } 746 747 static int proc_resetdevice(struct dev_state *ps) 748 { 749 return usb_reset_device(ps->dev); 750 751 } 752 753 static int proc_setintf(struct dev_state *ps, void __user *arg) 754 { 755 struct usbdevfs_setinterface setintf; 756 int ret; 757 758 if (copy_from_user(&setintf, arg, sizeof(setintf))) 759 return -EFAULT; 760 if ((ret = checkintf(ps, setintf.interface))) 761 return ret; 762 return usb_set_interface(ps->dev, setintf.interface, 763 setintf.altsetting); 764 } 765 766 static int proc_setconfig(struct dev_state *ps, void __user *arg) 767 { 768 unsigned int u; 769 int status = 0; 770 struct usb_host_config *actconfig; 771 772 if (get_user(u, (unsigned int __user *)arg)) 773 return -EFAULT; 774 775 actconfig = ps->dev->actconfig; 776 777 /* Don't touch the device if any interfaces are claimed. 778 * It could interfere with other drivers' operations, and if 779 * an interface is claimed by usbfs it could easily deadlock. 780 */ 781 if (actconfig) { 782 int i; 783 784 for (i = 0; i < actconfig->desc.bNumInterfaces; ++i) { 785 if (usb_interface_claimed(actconfig->interface[i])) { 786 dev_warn (&ps->dev->dev, 787 "usbfs: interface %d claimed " 788 "while '%s' sets config #%d\n", 789 actconfig->interface[i] 790 ->cur_altsetting 791 ->desc.bInterfaceNumber, 792 current->comm, u); 793 #if 0 /* FIXME: enable in 2.6.10 or so */ 794 status = -EBUSY; 795 break; 796 #endif 797 } 798 } 799 } 800 801 /* SET_CONFIGURATION is often abused as a "cheap" driver reset, 802 * so avoid usb_set_configuration()'s kick to sysfs 803 */ 804 if (status == 0) { 805 if (actconfig && actconfig->desc.bConfigurationValue == u) 806 status = usb_reset_configuration(ps->dev); 807 else 808 status = usb_set_configuration(ps->dev, u); 809 } 810 811 return status; 812 } 813 814 815 static int proc_do_submiturb(struct dev_state *ps, struct usbdevfs_urb *uurb, 816 struct usbdevfs_iso_packet_desc __user *iso_frame_desc, 817 void __user *arg) 818 { 819 struct usbdevfs_iso_packet_desc *isopkt = NULL; 820 struct usb_host_endpoint *ep; 821 struct async *as; 822 struct usb_ctrlrequest *dr = NULL; 823 unsigned int u, totlen, isofrmlen; 824 int ret, interval = 0, ifnum = -1; 825 826 if (uurb->flags & ~(USBDEVFS_URB_ISO_ASAP|USBDEVFS_URB_SHORT_NOT_OK| 827 URB_NO_FSBR|URB_ZERO_PACKET)) 828 return -EINVAL; 829 if (!uurb->buffer) 830 return -EINVAL; 831 if (uurb->signr != 0 && (uurb->signr < SIGRTMIN || uurb->signr > SIGRTMAX)) 832 return -EINVAL; 833 if (!(uurb->type == USBDEVFS_URB_TYPE_CONTROL && (uurb->endpoint & ~USB_ENDPOINT_DIR_MASK) == 0)) { 834 if ((ifnum = findintfep(ps->dev, uurb->endpoint)) < 0) 835 return ifnum; 836 if ((ret = checkintf(ps, ifnum))) 837 return ret; 838 } 839 if ((uurb->endpoint & USB_ENDPOINT_DIR_MASK) != 0) 840 ep = ps->dev->ep_in [uurb->endpoint & USB_ENDPOINT_NUMBER_MASK]; 841 else 842 ep = ps->dev->ep_out [uurb->endpoint & USB_ENDPOINT_NUMBER_MASK]; 843 if (!ep) 844 return -ENOENT; 845 switch(uurb->type) { 846 case USBDEVFS_URB_TYPE_CONTROL: 847 if ((ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) 848 != USB_ENDPOINT_XFER_CONTROL) 849 return -EINVAL; 850 /* min 8 byte setup packet, max arbitrary */ 851 if (uurb->buffer_length < 8 || uurb->buffer_length > PAGE_SIZE) 852 return -EINVAL; 853 if (!(dr = kmalloc(sizeof(struct usb_ctrlrequest), GFP_KERNEL))) 854 return -ENOMEM; 855 if (copy_from_user(dr, uurb->buffer, 8)) { 856 kfree(dr); 857 return -EFAULT; 858 } 859 if (uurb->buffer_length < (le16_to_cpup(&dr->wLength) + 8)) { 860 kfree(dr); 861 return -EINVAL; 862 } 863 if ((ret = check_ctrlrecip(ps, dr->bRequestType, le16_to_cpup(&dr->wIndex)))) { 864 kfree(dr); 865 return ret; 866 } 867 uurb->endpoint = (uurb->endpoint & ~USB_ENDPOINT_DIR_MASK) | (dr->bRequestType & USB_ENDPOINT_DIR_MASK); 868 uurb->number_of_packets = 0; 869 uurb->buffer_length = le16_to_cpup(&dr->wLength); 870 uurb->buffer += 8; 871 if (!access_ok((uurb->endpoint & USB_DIR_IN) ? VERIFY_WRITE : VERIFY_READ, uurb->buffer, uurb->buffer_length)) { 872 kfree(dr); 873 return -EFAULT; 874 } 875 break; 876 877 case USBDEVFS_URB_TYPE_BULK: 878 switch (ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) { 879 case USB_ENDPOINT_XFER_CONTROL: 880 case USB_ENDPOINT_XFER_ISOC: 881 return -EINVAL; 882 /* allow single-shot interrupt transfers, at bogus rates */ 883 } 884 uurb->number_of_packets = 0; 885 if (uurb->buffer_length > MAX_USBFS_BUFFER_SIZE) 886 return -EINVAL; 887 if (!access_ok((uurb->endpoint & USB_DIR_IN) ? VERIFY_WRITE : VERIFY_READ, uurb->buffer, uurb->buffer_length)) 888 return -EFAULT; 889 break; 890 891 case USBDEVFS_URB_TYPE_ISO: 892 /* arbitrary limit */ 893 if (uurb->number_of_packets < 1 || uurb->number_of_packets > 128) 894 return -EINVAL; 895 if ((ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) 896 != USB_ENDPOINT_XFER_ISOC) 897 return -EINVAL; 898 interval = 1 << min (15, ep->desc.bInterval - 1); 899 isofrmlen = sizeof(struct usbdevfs_iso_packet_desc) * uurb->number_of_packets; 900 if (!(isopkt = kmalloc(isofrmlen, GFP_KERNEL))) 901 return -ENOMEM; 902 if (copy_from_user(isopkt, iso_frame_desc, isofrmlen)) { 903 kfree(isopkt); 904 return -EFAULT; 905 } 906 for (totlen = u = 0; u < uurb->number_of_packets; u++) { 907 if (isopkt[u].length > 1023) { 908 kfree(isopkt); 909 return -EINVAL; 910 } 911 totlen += isopkt[u].length; 912 } 913 if (totlen > 32768) { 914 kfree(isopkt); 915 return -EINVAL; 916 } 917 uurb->buffer_length = totlen; 918 break; 919 920 case USBDEVFS_URB_TYPE_INTERRUPT: 921 uurb->number_of_packets = 0; 922 if ((ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) 923 != USB_ENDPOINT_XFER_INT) 924 return -EINVAL; 925 if (ps->dev->speed == USB_SPEED_HIGH) 926 interval = 1 << min (15, ep->desc.bInterval - 1); 927 else 928 interval = ep->desc.bInterval; 929 if (uurb->buffer_length > MAX_USBFS_BUFFER_SIZE) 930 return -EINVAL; 931 if (!access_ok((uurb->endpoint & USB_DIR_IN) ? VERIFY_WRITE : VERIFY_READ, uurb->buffer, uurb->buffer_length)) 932 return -EFAULT; 933 break; 934 935 default: 936 return -EINVAL; 937 } 938 if (!(as = alloc_async(uurb->number_of_packets))) { 939 kfree(isopkt); 940 kfree(dr); 941 return -ENOMEM; 942 } 943 if (!(as->urb->transfer_buffer = kmalloc(uurb->buffer_length, GFP_KERNEL))) { 944 kfree(isopkt); 945 kfree(dr); 946 free_async(as); 947 return -ENOMEM; 948 } 949 as->urb->dev = ps->dev; 950 as->urb->pipe = (uurb->type << 30) | __create_pipe(ps->dev, uurb->endpoint & 0xf) | (uurb->endpoint & USB_DIR_IN); 951 as->urb->transfer_flags = uurb->flags; 952 as->urb->transfer_buffer_length = uurb->buffer_length; 953 as->urb->setup_packet = (unsigned char*)dr; 954 as->urb->start_frame = uurb->start_frame; 955 as->urb->number_of_packets = uurb->number_of_packets; 956 as->urb->interval = interval; 957 as->urb->context = as; 958 as->urb->complete = async_completed; 959 for (totlen = u = 0; u < uurb->number_of_packets; u++) { 960 as->urb->iso_frame_desc[u].offset = totlen; 961 as->urb->iso_frame_desc[u].length = isopkt[u].length; 962 totlen += isopkt[u].length; 963 } 964 kfree(isopkt); 965 as->ps = ps; 966 as->userurb = arg; 967 if (uurb->endpoint & USB_DIR_IN) 968 as->userbuffer = uurb->buffer; 969 else 970 as->userbuffer = NULL; 971 as->signr = uurb->signr; 972 as->ifnum = ifnum; 973 as->task = current; 974 if (!(uurb->endpoint & USB_DIR_IN)) { 975 if (copy_from_user(as->urb->transfer_buffer, uurb->buffer, as->urb->transfer_buffer_length)) { 976 free_async(as); 977 return -EFAULT; 978 } 979 } 980 async_newpending(as); 981 if ((ret = usb_submit_urb(as->urb, GFP_KERNEL))) { 982 dev_printk(KERN_DEBUG, &ps->dev->dev, "usbfs: usb_submit_urb returned %d\n", ret); 983 async_removepending(as); 984 free_async(as); 985 return ret; 986 } 987 return 0; 988 } 989 990 static int proc_submiturb(struct dev_state *ps, void __user *arg) 991 { 992 struct usbdevfs_urb uurb; 993 994 if (copy_from_user(&uurb, arg, sizeof(uurb))) 995 return -EFAULT; 996 997 return proc_do_submiturb(ps, &uurb, (((struct usbdevfs_urb __user *)arg)->iso_frame_desc), arg); 998 } 999 1000 static int proc_unlinkurb(struct dev_state *ps, void __user *arg) 1001 { 1002 struct async *as; 1003 1004 as = async_getpending(ps, arg); 1005 if (!as) 1006 return -EINVAL; 1007 usb_kill_urb(as->urb); 1008 return 0; 1009 } 1010 1011 static int processcompl(struct async *as, void __user * __user *arg) 1012 { 1013 struct urb *urb = as->urb; 1014 struct usbdevfs_urb __user *userurb = as->userurb; 1015 void __user *addr = as->userurb; 1016 unsigned int i; 1017 1018 if (as->userbuffer) 1019 if (copy_to_user(as->userbuffer, urb->transfer_buffer, urb->transfer_buffer_length)) 1020 return -EFAULT; 1021 if (put_user(urb->status, &userurb->status)) 1022 return -EFAULT; 1023 if (put_user(urb->actual_length, &userurb->actual_length)) 1024 return -EFAULT; 1025 if (put_user(urb->error_count, &userurb->error_count)) 1026 return -EFAULT; 1027 1028 if (usb_pipeisoc(urb->pipe)) { 1029 for (i = 0; i < urb->number_of_packets; i++) { 1030 if (put_user(urb->iso_frame_desc[i].actual_length, 1031 &userurb->iso_frame_desc[i].actual_length)) 1032 return -EFAULT; 1033 if (put_user(urb->iso_frame_desc[i].status, 1034 &userurb->iso_frame_desc[i].status)) 1035 return -EFAULT; 1036 } 1037 } 1038 1039 free_async(as); 1040 1041 if (put_user(addr, (void __user * __user *)arg)) 1042 return -EFAULT; 1043 return 0; 1044 } 1045 1046 static struct async* reap_as(struct dev_state *ps) 1047 { 1048 DECLARE_WAITQUEUE(wait, current); 1049 struct async *as = NULL; 1050 struct usb_device *dev = ps->dev; 1051 1052 add_wait_queue(&ps->wait, &wait); 1053 for (;;) { 1054 __set_current_state(TASK_INTERRUPTIBLE); 1055 if ((as = async_getcompleted(ps))) 1056 break; 1057 if (signal_pending(current)) 1058 break; 1059 usb_unlock_device(dev); 1060 schedule(); 1061 usb_lock_device(dev); 1062 } 1063 remove_wait_queue(&ps->wait, &wait); 1064 set_current_state(TASK_RUNNING); 1065 return as; 1066 } 1067 1068 static int proc_reapurb(struct dev_state *ps, void __user *arg) 1069 { 1070 struct async *as = reap_as(ps); 1071 if (as) 1072 return processcompl(as, (void __user * __user *)arg); 1073 if (signal_pending(current)) 1074 return -EINTR; 1075 return -EIO; 1076 } 1077 1078 static int proc_reapurbnonblock(struct dev_state *ps, void __user *arg) 1079 { 1080 struct async *as; 1081 1082 if (!(as = async_getcompleted(ps))) 1083 return -EAGAIN; 1084 return processcompl(as, (void __user * __user *)arg); 1085 } 1086 1087 #ifdef CONFIG_COMPAT 1088 1089 static int get_urb32(struct usbdevfs_urb *kurb, 1090 struct usbdevfs_urb32 __user *uurb) 1091 { 1092 __u32 uptr; 1093 if (get_user(kurb->type, &uurb->type) || 1094 __get_user(kurb->endpoint, &uurb->endpoint) || 1095 __get_user(kurb->status, &uurb->status) || 1096 __get_user(kurb->flags, &uurb->flags) || 1097 __get_user(kurb->buffer_length, &uurb->buffer_length) || 1098 __get_user(kurb->actual_length, &uurb->actual_length) || 1099 __get_user(kurb->start_frame, &uurb->start_frame) || 1100 __get_user(kurb->number_of_packets, &uurb->number_of_packets) || 1101 __get_user(kurb->error_count, &uurb->error_count) || 1102 __get_user(kurb->signr, &uurb->signr)) 1103 return -EFAULT; 1104 1105 if (__get_user(uptr, &uurb->buffer)) 1106 return -EFAULT; 1107 kurb->buffer = compat_ptr(uptr); 1108 if (__get_user(uptr, &uurb->buffer)) 1109 return -EFAULT; 1110 kurb->usercontext = compat_ptr(uptr); 1111 1112 return 0; 1113 } 1114 1115 static int proc_submiturb_compat(struct dev_state *ps, void __user *arg) 1116 { 1117 struct usbdevfs_urb uurb; 1118 1119 if (get_urb32(&uurb,(struct usbdevfs_urb32 *)arg)) 1120 return -EFAULT; 1121 1122 return proc_do_submiturb(ps, &uurb, ((struct usbdevfs_urb32 __user *)arg)->iso_frame_desc, arg); 1123 } 1124 1125 static int processcompl_compat(struct async *as, void __user * __user *arg) 1126 { 1127 struct urb *urb = as->urb; 1128 struct usbdevfs_urb32 __user *userurb = as->userurb; 1129 void __user *addr = as->userurb; 1130 unsigned int i; 1131 1132 if (as->userbuffer) 1133 if (copy_to_user(as->userbuffer, urb->transfer_buffer, urb->transfer_buffer_length)) 1134 return -EFAULT; 1135 if (put_user(urb->status, &userurb->status)) 1136 return -EFAULT; 1137 if (put_user(urb->actual_length, &userurb->actual_length)) 1138 return -EFAULT; 1139 if (put_user(urb->error_count, &userurb->error_count)) 1140 return -EFAULT; 1141 1142 if (usb_pipeisoc(urb->pipe)) { 1143 for (i = 0; i < urb->number_of_packets; i++) { 1144 if (put_user(urb->iso_frame_desc[i].actual_length, 1145 &userurb->iso_frame_desc[i].actual_length)) 1146 return -EFAULT; 1147 if (put_user(urb->iso_frame_desc[i].status, 1148 &userurb->iso_frame_desc[i].status)) 1149 return -EFAULT; 1150 } 1151 } 1152 1153 free_async(as); 1154 if (put_user((u32)(u64)addr, (u32 __user *)arg)) 1155 return -EFAULT; 1156 return 0; 1157 } 1158 1159 static int proc_reapurb_compat(struct dev_state *ps, void __user *arg) 1160 { 1161 struct async *as = reap_as(ps); 1162 if (as) 1163 return processcompl_compat(as, (void __user * __user *)arg); 1164 if (signal_pending(current)) 1165 return -EINTR; 1166 return -EIO; 1167 } 1168 1169 static int proc_reapurbnonblock_compat(struct dev_state *ps, void __user *arg) 1170 { 1171 struct async *as; 1172 1173 if (!(as = async_getcompleted(ps))) 1174 return -EAGAIN; 1175 return processcompl_compat(as, (void __user * __user *)arg); 1176 } 1177 1178 #endif 1179 1180 static int proc_disconnectsignal(struct dev_state *ps, void __user *arg) 1181 { 1182 struct usbdevfs_disconnectsignal ds; 1183 1184 if (copy_from_user(&ds, arg, sizeof(ds))) 1185 return -EFAULT; 1186 if (ds.signr != 0 && (ds.signr < SIGRTMIN || ds.signr > SIGRTMAX)) 1187 return -EINVAL; 1188 ps->discsignr = ds.signr; 1189 ps->disccontext = ds.context; 1190 return 0; 1191 } 1192 1193 static int proc_claiminterface(struct dev_state *ps, void __user *arg) 1194 { 1195 unsigned int ifnum; 1196 1197 if (get_user(ifnum, (unsigned int __user *)arg)) 1198 return -EFAULT; 1199 return claimintf(ps, ifnum); 1200 } 1201 1202 static int proc_releaseinterface(struct dev_state *ps, void __user *arg) 1203 { 1204 unsigned int ifnum; 1205 int ret; 1206 1207 if (get_user(ifnum, (unsigned int __user *)arg)) 1208 return -EFAULT; 1209 if ((ret = releaseintf(ps, ifnum)) < 0) 1210 return ret; 1211 destroy_async_on_interface (ps, ifnum); 1212 return 0; 1213 } 1214 1215 static int proc_ioctl (struct dev_state *ps, void __user *arg) 1216 { 1217 struct usbdevfs_ioctl ctrl; 1218 int size; 1219 void *buf = NULL; 1220 int retval = 0; 1221 struct usb_interface *intf = NULL; 1222 struct usb_driver *driver = NULL; 1223 int i; 1224 1225 /* get input parameters and alloc buffer */ 1226 if (copy_from_user(&ctrl, arg, sizeof (ctrl))) 1227 return -EFAULT; 1228 if ((size = _IOC_SIZE (ctrl.ioctl_code)) > 0) { 1229 if ((buf = kmalloc (size, GFP_KERNEL)) == NULL) 1230 return -ENOMEM; 1231 if ((_IOC_DIR(ctrl.ioctl_code) & _IOC_WRITE)) { 1232 if (copy_from_user (buf, ctrl.data, size)) { 1233 kfree(buf); 1234 return -EFAULT; 1235 } 1236 } else { 1237 memset (buf, 0, size); 1238 } 1239 } 1240 1241 if (!connected(ps->dev)) { 1242 kfree(buf); 1243 return -ENODEV; 1244 } 1245 1246 if (ps->dev->state != USB_STATE_CONFIGURED) 1247 retval = -EHOSTUNREACH; 1248 else if (!(intf = usb_ifnum_to_if (ps->dev, ctrl.ifno))) 1249 retval = -EINVAL; 1250 else switch (ctrl.ioctl_code) { 1251 1252 /* disconnect kernel driver from interface */ 1253 case USBDEVFS_DISCONNECT: 1254 1255 /* don't allow the user to unbind the hub driver from 1256 * a hub with children to manage */ 1257 for (i = 0; i < ps->dev->maxchild; ++i) { 1258 if (ps->dev->children[i]) 1259 retval = -EBUSY; 1260 } 1261 if (retval) 1262 break; 1263 1264 down_write(&usb_bus_type.subsys.rwsem); 1265 if (intf->dev.driver) { 1266 driver = to_usb_driver(intf->dev.driver); 1267 dev_dbg (&intf->dev, "disconnect by usbfs\n"); 1268 usb_driver_release_interface(driver, intf); 1269 } else 1270 retval = -ENODATA; 1271 up_write(&usb_bus_type.subsys.rwsem); 1272 break; 1273 1274 /* let kernel drivers try to (re)bind to the interface */ 1275 case USBDEVFS_CONNECT: 1276 usb_unlock_device(ps->dev); 1277 usb_lock_all_devices(); 1278 bus_rescan_devices(intf->dev.bus); 1279 usb_unlock_all_devices(); 1280 usb_lock_device(ps->dev); 1281 break; 1282 1283 /* talk directly to the interface's driver */ 1284 default: 1285 down_read(&usb_bus_type.subsys.rwsem); 1286 if (intf->dev.driver) 1287 driver = to_usb_driver(intf->dev.driver); 1288 if (driver == NULL || driver->ioctl == NULL) { 1289 retval = -ENOTTY; 1290 } else { 1291 retval = driver->ioctl (intf, ctrl.ioctl_code, buf); 1292 if (retval == -ENOIOCTLCMD) 1293 retval = -ENOTTY; 1294 } 1295 up_read(&usb_bus_type.subsys.rwsem); 1296 } 1297 1298 /* cleanup and return */ 1299 if (retval >= 0 1300 && (_IOC_DIR (ctrl.ioctl_code) & _IOC_READ) != 0 1301 && size > 0 1302 && copy_to_user (ctrl.data, buf, size) != 0) 1303 retval = -EFAULT; 1304 1305 kfree(buf); 1306 return retval; 1307 } 1308 1309 /* 1310 * NOTE: All requests here that have interface numbers as parameters 1311 * are assuming that somehow the configuration has been prevented from 1312 * changing. But there's no mechanism to ensure that... 1313 */ 1314 static int usbdev_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg) 1315 { 1316 struct dev_state *ps = (struct dev_state *)file->private_data; 1317 struct usb_device *dev = ps->dev; 1318 void __user *p = (void __user *)arg; 1319 int ret = -ENOTTY; 1320 1321 if (!(file->f_mode & FMODE_WRITE)) 1322 return -EPERM; 1323 usb_lock_device(dev); 1324 if (!connected(dev)) { 1325 usb_unlock_device(dev); 1326 return -ENODEV; 1327 } 1328 1329 switch (cmd) { 1330 case USBDEVFS_CONTROL: 1331 snoop(&dev->dev, "%s: CONTROL\n", __FUNCTION__); 1332 ret = proc_control(ps, p); 1333 if (ret >= 0) 1334 inode->i_mtime = CURRENT_TIME; 1335 break; 1336 1337 case USBDEVFS_BULK: 1338 snoop(&dev->dev, "%s: BULK\n", __FUNCTION__); 1339 ret = proc_bulk(ps, p); 1340 if (ret >= 0) 1341 inode->i_mtime = CURRENT_TIME; 1342 break; 1343 1344 case USBDEVFS_RESETEP: 1345 snoop(&dev->dev, "%s: RESETEP\n", __FUNCTION__); 1346 ret = proc_resetep(ps, p); 1347 if (ret >= 0) 1348 inode->i_mtime = CURRENT_TIME; 1349 break; 1350 1351 case USBDEVFS_RESET: 1352 snoop(&dev->dev, "%s: RESET\n", __FUNCTION__); 1353 ret = proc_resetdevice(ps); 1354 break; 1355 1356 case USBDEVFS_CLEAR_HALT: 1357 snoop(&dev->dev, "%s: CLEAR_HALT\n", __FUNCTION__); 1358 ret = proc_clearhalt(ps, p); 1359 if (ret >= 0) 1360 inode->i_mtime = CURRENT_TIME; 1361 break; 1362 1363 case USBDEVFS_GETDRIVER: 1364 snoop(&dev->dev, "%s: GETDRIVER\n", __FUNCTION__); 1365 ret = proc_getdriver(ps, p); 1366 break; 1367 1368 case USBDEVFS_CONNECTINFO: 1369 snoop(&dev->dev, "%s: CONNECTINFO\n", __FUNCTION__); 1370 ret = proc_connectinfo(ps, p); 1371 break; 1372 1373 case USBDEVFS_SETINTERFACE: 1374 snoop(&dev->dev, "%s: SETINTERFACE\n", __FUNCTION__); 1375 ret = proc_setintf(ps, p); 1376 break; 1377 1378 case USBDEVFS_SETCONFIGURATION: 1379 snoop(&dev->dev, "%s: SETCONFIGURATION\n", __FUNCTION__); 1380 ret = proc_setconfig(ps, p); 1381 break; 1382 1383 case USBDEVFS_SUBMITURB: 1384 snoop(&dev->dev, "%s: SUBMITURB\n", __FUNCTION__); 1385 ret = proc_submiturb(ps, p); 1386 if (ret >= 0) 1387 inode->i_mtime = CURRENT_TIME; 1388 break; 1389 1390 #ifdef CONFIG_COMPAT 1391 1392 case USBDEVFS_SUBMITURB32: 1393 snoop(&dev->dev, "%s: SUBMITURB32\n", __FUNCTION__); 1394 ret = proc_submiturb_compat(ps, p); 1395 if (ret >= 0) 1396 inode->i_mtime = CURRENT_TIME; 1397 break; 1398 1399 case USBDEVFS_REAPURB32: 1400 snoop(&dev->dev, "%s: REAPURB32\n", __FUNCTION__); 1401 ret = proc_reapurb_compat(ps, p); 1402 break; 1403 1404 case USBDEVFS_REAPURBNDELAY32: 1405 snoop(&dev->dev, "%s: REAPURBDELAY32\n", __FUNCTION__); 1406 ret = proc_reapurbnonblock_compat(ps, p); 1407 break; 1408 1409 #endif 1410 1411 case USBDEVFS_DISCARDURB: 1412 snoop(&dev->dev, "%s: DISCARDURB\n", __FUNCTION__); 1413 ret = proc_unlinkurb(ps, p); 1414 break; 1415 1416 case USBDEVFS_REAPURB: 1417 snoop(&dev->dev, "%s: REAPURB\n", __FUNCTION__); 1418 ret = proc_reapurb(ps, p); 1419 break; 1420 1421 case USBDEVFS_REAPURBNDELAY: 1422 snoop(&dev->dev, "%s: REAPURBDELAY\n", __FUNCTION__); 1423 ret = proc_reapurbnonblock(ps, p); 1424 break; 1425 1426 case USBDEVFS_DISCSIGNAL: 1427 snoop(&dev->dev, "%s: DISCSIGNAL\n", __FUNCTION__); 1428 ret = proc_disconnectsignal(ps, p); 1429 break; 1430 1431 case USBDEVFS_CLAIMINTERFACE: 1432 snoop(&dev->dev, "%s: CLAIMINTERFACE\n", __FUNCTION__); 1433 ret = proc_claiminterface(ps, p); 1434 break; 1435 1436 case USBDEVFS_RELEASEINTERFACE: 1437 snoop(&dev->dev, "%s: RELEASEINTERFACE\n", __FUNCTION__); 1438 ret = proc_releaseinterface(ps, p); 1439 break; 1440 1441 case USBDEVFS_IOCTL: 1442 snoop(&dev->dev, "%s: IOCTL\n", __FUNCTION__); 1443 ret = proc_ioctl(ps, p); 1444 break; 1445 } 1446 usb_unlock_device(dev); 1447 if (ret >= 0) 1448 inode->i_atime = CURRENT_TIME; 1449 return ret; 1450 } 1451 1452 /* No kernel lock - fine */ 1453 static unsigned int usbdev_poll(struct file *file, struct poll_table_struct *wait) 1454 { 1455 struct dev_state *ps = (struct dev_state *)file->private_data; 1456 unsigned int mask = 0; 1457 1458 poll_wait(file, &ps->wait, wait); 1459 if (file->f_mode & FMODE_WRITE && !list_empty(&ps->async_completed)) 1460 mask |= POLLOUT | POLLWRNORM; 1461 if (!connected(ps->dev)) 1462 mask |= POLLERR | POLLHUP; 1463 return mask; 1464 } 1465 1466 struct file_operations usbfs_device_file_operations = { 1467 .llseek = usbdev_lseek, 1468 .read = usbdev_read, 1469 .poll = usbdev_poll, 1470 .ioctl = usbdev_ioctl, 1471 .open = usbdev_open, 1472 .release = usbdev_release, 1473 }; 1474