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 " 573 "bRrequestType=%02x wValue=%04x " 574 "wIndex=%04x wLength=%04x\n", 575 ctrl.bRequest, ctrl.bRequestType, ctrl.wValue, 576 ctrl.wIndex, ctrl.wLength); 577 578 usb_unlock_device(dev); 579 i = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), ctrl.bRequest, ctrl.bRequestType, 580 ctrl.wValue, ctrl.wIndex, tbuf, ctrl.wLength, tmo); 581 usb_lock_device(dev); 582 if ((i > 0) && ctrl.wLength) { 583 if (usbfs_snoop) { 584 dev_info(&dev->dev, "control read: data "); 585 for (j = 0; j < i; ++j) 586 printk ("%02x ", (unsigned char)(tbuf)[j]); 587 printk("\n"); 588 } 589 if (copy_to_user(ctrl.data, tbuf, i)) { 590 free_page((unsigned long)tbuf); 591 return -EFAULT; 592 } 593 } 594 } else { 595 if (ctrl.wLength) { 596 if (copy_from_user(tbuf, ctrl.data, ctrl.wLength)) { 597 free_page((unsigned long)tbuf); 598 return -EFAULT; 599 } 600 } 601 snoop(&dev->dev, "control write: bRequest=%02x " 602 "bRrequestType=%02x wValue=%04x " 603 "wIndex=%04x wLength=%04x\n", 604 ctrl.bRequest, ctrl.bRequestType, ctrl.wValue, 605 ctrl.wIndex, ctrl.wLength); 606 if (usbfs_snoop) { 607 dev_info(&dev->dev, "control write: data: "); 608 for (j = 0; j < ctrl.wLength; ++j) 609 printk ("%02x ", (unsigned char)(tbuf)[j]); 610 printk("\n"); 611 } 612 usb_unlock_device(dev); 613 i = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), ctrl.bRequest, ctrl.bRequestType, 614 ctrl.wValue, ctrl.wIndex, tbuf, ctrl.wLength, tmo); 615 usb_lock_device(dev); 616 } 617 free_page((unsigned long)tbuf); 618 if (i<0 && i != -EPIPE) { 619 dev_printk(KERN_DEBUG, &dev->dev, "usbfs: USBDEVFS_CONTROL " 620 "failed cmd %s rqt %u rq %u len %u ret %d\n", 621 current->comm, ctrl.bRequestType, ctrl.bRequest, 622 ctrl.wLength, i); 623 } 624 return i; 625 } 626 627 static int proc_bulk(struct dev_state *ps, void __user *arg) 628 { 629 struct usb_device *dev = ps->dev; 630 struct usbdevfs_bulktransfer bulk; 631 unsigned int tmo, len1, pipe; 632 int len2; 633 unsigned char *tbuf; 634 int i, ret; 635 636 if (copy_from_user(&bulk, arg, sizeof(bulk))) 637 return -EFAULT; 638 if ((ret = findintfep(ps->dev, bulk.ep)) < 0) 639 return ret; 640 if ((ret = checkintf(ps, ret))) 641 return ret; 642 if (bulk.ep & USB_DIR_IN) 643 pipe = usb_rcvbulkpipe(dev, bulk.ep & 0x7f); 644 else 645 pipe = usb_sndbulkpipe(dev, bulk.ep & 0x7f); 646 if (!usb_maxpacket(dev, pipe, !(bulk.ep & USB_DIR_IN))) 647 return -EINVAL; 648 len1 = bulk.len; 649 if (len1 > MAX_USBFS_BUFFER_SIZE) 650 return -EINVAL; 651 if (!(tbuf = kmalloc(len1, GFP_KERNEL))) 652 return -ENOMEM; 653 tmo = bulk.timeout; 654 if (bulk.ep & 0x80) { 655 if (len1 && !access_ok(VERIFY_WRITE, bulk.data, len1)) { 656 kfree(tbuf); 657 return -EINVAL; 658 } 659 usb_unlock_device(dev); 660 i = usb_bulk_msg(dev, pipe, tbuf, len1, &len2, tmo); 661 usb_lock_device(dev); 662 if (!i && len2) { 663 if (copy_to_user(bulk.data, tbuf, len2)) { 664 kfree(tbuf); 665 return -EFAULT; 666 } 667 } 668 } else { 669 if (len1) { 670 if (copy_from_user(tbuf, bulk.data, len1)) { 671 kfree(tbuf); 672 return -EFAULT; 673 } 674 } 675 usb_unlock_device(dev); 676 i = usb_bulk_msg(dev, pipe, tbuf, len1, &len2, tmo); 677 usb_lock_device(dev); 678 } 679 kfree(tbuf); 680 if (i < 0) 681 return i; 682 return len2; 683 } 684 685 static int proc_resetep(struct dev_state *ps, void __user *arg) 686 { 687 unsigned int ep; 688 int ret; 689 690 if (get_user(ep, (unsigned int __user *)arg)) 691 return -EFAULT; 692 if ((ret = findintfep(ps->dev, ep)) < 0) 693 return ret; 694 if ((ret = checkintf(ps, ret))) 695 return ret; 696 usb_settoggle(ps->dev, ep & 0xf, !(ep & USB_DIR_IN), 0); 697 return 0; 698 } 699 700 static int proc_clearhalt(struct dev_state *ps, void __user *arg) 701 { 702 unsigned int ep; 703 int pipe; 704 int ret; 705 706 if (get_user(ep, (unsigned int __user *)arg)) 707 return -EFAULT; 708 if ((ret = findintfep(ps->dev, ep)) < 0) 709 return ret; 710 if ((ret = checkintf(ps, ret))) 711 return ret; 712 if (ep & USB_DIR_IN) 713 pipe = usb_rcvbulkpipe(ps->dev, ep & 0x7f); 714 else 715 pipe = usb_sndbulkpipe(ps->dev, ep & 0x7f); 716 717 return usb_clear_halt(ps->dev, pipe); 718 } 719 720 721 static int proc_getdriver(struct dev_state *ps, void __user *arg) 722 { 723 struct usbdevfs_getdriver gd; 724 struct usb_interface *intf; 725 int ret; 726 727 if (copy_from_user(&gd, arg, sizeof(gd))) 728 return -EFAULT; 729 down_read(&usb_bus_type.subsys.rwsem); 730 intf = usb_ifnum_to_if(ps->dev, gd.interface); 731 if (!intf || !intf->dev.driver) 732 ret = -ENODATA; 733 else { 734 strncpy(gd.driver, intf->dev.driver->name, 735 sizeof(gd.driver)); 736 ret = (copy_to_user(arg, &gd, sizeof(gd)) ? -EFAULT : 0); 737 } 738 up_read(&usb_bus_type.subsys.rwsem); 739 return ret; 740 } 741 742 static int proc_connectinfo(struct dev_state *ps, void __user *arg) 743 { 744 struct usbdevfs_connectinfo ci; 745 746 ci.devnum = ps->dev->devnum; 747 ci.slow = ps->dev->speed == USB_SPEED_LOW; 748 if (copy_to_user(arg, &ci, sizeof(ci))) 749 return -EFAULT; 750 return 0; 751 } 752 753 static int proc_resetdevice(struct dev_state *ps) 754 { 755 return usb_reset_device(ps->dev); 756 757 } 758 759 static int proc_setintf(struct dev_state *ps, void __user *arg) 760 { 761 struct usbdevfs_setinterface setintf; 762 int ret; 763 764 if (copy_from_user(&setintf, arg, sizeof(setintf))) 765 return -EFAULT; 766 if ((ret = checkintf(ps, setintf.interface))) 767 return ret; 768 return usb_set_interface(ps->dev, setintf.interface, 769 setintf.altsetting); 770 } 771 772 static int proc_setconfig(struct dev_state *ps, void __user *arg) 773 { 774 unsigned int u; 775 int status = 0; 776 struct usb_host_config *actconfig; 777 778 if (get_user(u, (unsigned int __user *)arg)) 779 return -EFAULT; 780 781 actconfig = ps->dev->actconfig; 782 783 /* Don't touch the device if any interfaces are claimed. 784 * It could interfere with other drivers' operations, and if 785 * an interface is claimed by usbfs it could easily deadlock. 786 */ 787 if (actconfig) { 788 int i; 789 790 for (i = 0; i < actconfig->desc.bNumInterfaces; ++i) { 791 if (usb_interface_claimed(actconfig->interface[i])) { 792 dev_warn (&ps->dev->dev, 793 "usbfs: interface %d claimed by %s " 794 "while '%s' sets config #%d\n", 795 actconfig->interface[i] 796 ->cur_altsetting 797 ->desc.bInterfaceNumber, 798 actconfig->interface[i] 799 ->dev.driver->name, 800 current->comm, u); 801 status = -EBUSY; 802 break; 803 } 804 } 805 } 806 807 /* SET_CONFIGURATION is often abused as a "cheap" driver reset, 808 * so avoid usb_set_configuration()'s kick to sysfs 809 */ 810 if (status == 0) { 811 if (actconfig && actconfig->desc.bConfigurationValue == u) 812 status = usb_reset_configuration(ps->dev); 813 else 814 status = usb_set_configuration(ps->dev, u); 815 } 816 817 return status; 818 } 819 820 821 static int proc_do_submiturb(struct dev_state *ps, struct usbdevfs_urb *uurb, 822 struct usbdevfs_iso_packet_desc __user *iso_frame_desc, 823 void __user *arg) 824 { 825 struct usbdevfs_iso_packet_desc *isopkt = NULL; 826 struct usb_host_endpoint *ep; 827 struct async *as; 828 struct usb_ctrlrequest *dr = NULL; 829 unsigned int u, totlen, isofrmlen; 830 int ret, interval = 0, ifnum = -1; 831 832 if (uurb->flags & ~(USBDEVFS_URB_ISO_ASAP|USBDEVFS_URB_SHORT_NOT_OK| 833 URB_NO_FSBR|URB_ZERO_PACKET)) 834 return -EINVAL; 835 if (!uurb->buffer) 836 return -EINVAL; 837 if (uurb->signr != 0 && (uurb->signr < SIGRTMIN || uurb->signr > SIGRTMAX)) 838 return -EINVAL; 839 if (!(uurb->type == USBDEVFS_URB_TYPE_CONTROL && (uurb->endpoint & ~USB_ENDPOINT_DIR_MASK) == 0)) { 840 if ((ifnum = findintfep(ps->dev, uurb->endpoint)) < 0) 841 return ifnum; 842 if ((ret = checkintf(ps, ifnum))) 843 return ret; 844 } 845 if ((uurb->endpoint & USB_ENDPOINT_DIR_MASK) != 0) 846 ep = ps->dev->ep_in [uurb->endpoint & USB_ENDPOINT_NUMBER_MASK]; 847 else 848 ep = ps->dev->ep_out [uurb->endpoint & USB_ENDPOINT_NUMBER_MASK]; 849 if (!ep) 850 return -ENOENT; 851 switch(uurb->type) { 852 case USBDEVFS_URB_TYPE_CONTROL: 853 if ((ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) 854 != USB_ENDPOINT_XFER_CONTROL) 855 return -EINVAL; 856 /* min 8 byte setup packet, max arbitrary */ 857 if (uurb->buffer_length < 8 || uurb->buffer_length > PAGE_SIZE) 858 return -EINVAL; 859 if (!(dr = kmalloc(sizeof(struct usb_ctrlrequest), GFP_KERNEL))) 860 return -ENOMEM; 861 if (copy_from_user(dr, uurb->buffer, 8)) { 862 kfree(dr); 863 return -EFAULT; 864 } 865 if (uurb->buffer_length < (le16_to_cpup(&dr->wLength) + 8)) { 866 kfree(dr); 867 return -EINVAL; 868 } 869 if ((ret = check_ctrlrecip(ps, dr->bRequestType, le16_to_cpup(&dr->wIndex)))) { 870 kfree(dr); 871 return ret; 872 } 873 uurb->endpoint = (uurb->endpoint & ~USB_ENDPOINT_DIR_MASK) | (dr->bRequestType & USB_ENDPOINT_DIR_MASK); 874 uurb->number_of_packets = 0; 875 uurb->buffer_length = le16_to_cpup(&dr->wLength); 876 uurb->buffer += 8; 877 if (!access_ok((uurb->endpoint & USB_DIR_IN) ? VERIFY_WRITE : VERIFY_READ, uurb->buffer, uurb->buffer_length)) { 878 kfree(dr); 879 return -EFAULT; 880 } 881 break; 882 883 case USBDEVFS_URB_TYPE_BULK: 884 switch (ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) { 885 case USB_ENDPOINT_XFER_CONTROL: 886 case USB_ENDPOINT_XFER_ISOC: 887 return -EINVAL; 888 /* allow single-shot interrupt transfers, at bogus rates */ 889 } 890 uurb->number_of_packets = 0; 891 if (uurb->buffer_length > MAX_USBFS_BUFFER_SIZE) 892 return -EINVAL; 893 if (!access_ok((uurb->endpoint & USB_DIR_IN) ? VERIFY_WRITE : VERIFY_READ, uurb->buffer, uurb->buffer_length)) 894 return -EFAULT; 895 break; 896 897 case USBDEVFS_URB_TYPE_ISO: 898 /* arbitrary limit */ 899 if (uurb->number_of_packets < 1 || uurb->number_of_packets > 128) 900 return -EINVAL; 901 if ((ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) 902 != USB_ENDPOINT_XFER_ISOC) 903 return -EINVAL; 904 interval = 1 << min (15, ep->desc.bInterval - 1); 905 isofrmlen = sizeof(struct usbdevfs_iso_packet_desc) * uurb->number_of_packets; 906 if (!(isopkt = kmalloc(isofrmlen, GFP_KERNEL))) 907 return -ENOMEM; 908 if (copy_from_user(isopkt, iso_frame_desc, isofrmlen)) { 909 kfree(isopkt); 910 return -EFAULT; 911 } 912 for (totlen = u = 0; u < uurb->number_of_packets; u++) { 913 if (isopkt[u].length > 1023) { 914 kfree(isopkt); 915 return -EINVAL; 916 } 917 totlen += isopkt[u].length; 918 } 919 if (totlen > 32768) { 920 kfree(isopkt); 921 return -EINVAL; 922 } 923 uurb->buffer_length = totlen; 924 break; 925 926 case USBDEVFS_URB_TYPE_INTERRUPT: 927 uurb->number_of_packets = 0; 928 if ((ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) 929 != USB_ENDPOINT_XFER_INT) 930 return -EINVAL; 931 if (ps->dev->speed == USB_SPEED_HIGH) 932 interval = 1 << min (15, ep->desc.bInterval - 1); 933 else 934 interval = ep->desc.bInterval; 935 if (uurb->buffer_length > MAX_USBFS_BUFFER_SIZE) 936 return -EINVAL; 937 if (!access_ok((uurb->endpoint & USB_DIR_IN) ? VERIFY_WRITE : VERIFY_READ, uurb->buffer, uurb->buffer_length)) 938 return -EFAULT; 939 break; 940 941 default: 942 return -EINVAL; 943 } 944 if (!(as = alloc_async(uurb->number_of_packets))) { 945 kfree(isopkt); 946 kfree(dr); 947 return -ENOMEM; 948 } 949 if (!(as->urb->transfer_buffer = kmalloc(uurb->buffer_length, GFP_KERNEL))) { 950 kfree(isopkt); 951 kfree(dr); 952 free_async(as); 953 return -ENOMEM; 954 } 955 as->urb->dev = ps->dev; 956 as->urb->pipe = (uurb->type << 30) | __create_pipe(ps->dev, uurb->endpoint & 0xf) | (uurb->endpoint & USB_DIR_IN); 957 as->urb->transfer_flags = uurb->flags; 958 as->urb->transfer_buffer_length = uurb->buffer_length; 959 as->urb->setup_packet = (unsigned char*)dr; 960 as->urb->start_frame = uurb->start_frame; 961 as->urb->number_of_packets = uurb->number_of_packets; 962 as->urb->interval = interval; 963 as->urb->context = as; 964 as->urb->complete = async_completed; 965 for (totlen = u = 0; u < uurb->number_of_packets; u++) { 966 as->urb->iso_frame_desc[u].offset = totlen; 967 as->urb->iso_frame_desc[u].length = isopkt[u].length; 968 totlen += isopkt[u].length; 969 } 970 kfree(isopkt); 971 as->ps = ps; 972 as->userurb = arg; 973 if (uurb->endpoint & USB_DIR_IN) 974 as->userbuffer = uurb->buffer; 975 else 976 as->userbuffer = NULL; 977 as->signr = uurb->signr; 978 as->ifnum = ifnum; 979 as->task = current; 980 if (!(uurb->endpoint & USB_DIR_IN)) { 981 if (copy_from_user(as->urb->transfer_buffer, uurb->buffer, as->urb->transfer_buffer_length)) { 982 free_async(as); 983 return -EFAULT; 984 } 985 } 986 async_newpending(as); 987 if ((ret = usb_submit_urb(as->urb, GFP_KERNEL))) { 988 dev_printk(KERN_DEBUG, &ps->dev->dev, "usbfs: usb_submit_urb returned %d\n", ret); 989 async_removepending(as); 990 free_async(as); 991 return ret; 992 } 993 return 0; 994 } 995 996 static int proc_submiturb(struct dev_state *ps, void __user *arg) 997 { 998 struct usbdevfs_urb uurb; 999 1000 if (copy_from_user(&uurb, arg, sizeof(uurb))) 1001 return -EFAULT; 1002 1003 return proc_do_submiturb(ps, &uurb, (((struct usbdevfs_urb __user *)arg)->iso_frame_desc), arg); 1004 } 1005 1006 static int proc_unlinkurb(struct dev_state *ps, void __user *arg) 1007 { 1008 struct async *as; 1009 1010 as = async_getpending(ps, arg); 1011 if (!as) 1012 return -EINVAL; 1013 usb_kill_urb(as->urb); 1014 return 0; 1015 } 1016 1017 static int processcompl(struct async *as, void __user * __user *arg) 1018 { 1019 struct urb *urb = as->urb; 1020 struct usbdevfs_urb __user *userurb = as->userurb; 1021 void __user *addr = as->userurb; 1022 unsigned int i; 1023 1024 if (as->userbuffer) 1025 if (copy_to_user(as->userbuffer, urb->transfer_buffer, urb->transfer_buffer_length)) 1026 return -EFAULT; 1027 if (put_user(urb->status, &userurb->status)) 1028 return -EFAULT; 1029 if (put_user(urb->actual_length, &userurb->actual_length)) 1030 return -EFAULT; 1031 if (put_user(urb->error_count, &userurb->error_count)) 1032 return -EFAULT; 1033 1034 if (usb_pipeisoc(urb->pipe)) { 1035 for (i = 0; i < urb->number_of_packets; i++) { 1036 if (put_user(urb->iso_frame_desc[i].actual_length, 1037 &userurb->iso_frame_desc[i].actual_length)) 1038 return -EFAULT; 1039 if (put_user(urb->iso_frame_desc[i].status, 1040 &userurb->iso_frame_desc[i].status)) 1041 return -EFAULT; 1042 } 1043 } 1044 1045 free_async(as); 1046 1047 if (put_user(addr, (void __user * __user *)arg)) 1048 return -EFAULT; 1049 return 0; 1050 } 1051 1052 static struct async* reap_as(struct dev_state *ps) 1053 { 1054 DECLARE_WAITQUEUE(wait, current); 1055 struct async *as = NULL; 1056 struct usb_device *dev = ps->dev; 1057 1058 add_wait_queue(&ps->wait, &wait); 1059 for (;;) { 1060 __set_current_state(TASK_INTERRUPTIBLE); 1061 if ((as = async_getcompleted(ps))) 1062 break; 1063 if (signal_pending(current)) 1064 break; 1065 usb_unlock_device(dev); 1066 schedule(); 1067 usb_lock_device(dev); 1068 } 1069 remove_wait_queue(&ps->wait, &wait); 1070 set_current_state(TASK_RUNNING); 1071 return as; 1072 } 1073 1074 static int proc_reapurb(struct dev_state *ps, void __user *arg) 1075 { 1076 struct async *as = reap_as(ps); 1077 if (as) 1078 return processcompl(as, (void __user * __user *)arg); 1079 if (signal_pending(current)) 1080 return -EINTR; 1081 return -EIO; 1082 } 1083 1084 static int proc_reapurbnonblock(struct dev_state *ps, void __user *arg) 1085 { 1086 struct async *as; 1087 1088 if (!(as = async_getcompleted(ps))) 1089 return -EAGAIN; 1090 return processcompl(as, (void __user * __user *)arg); 1091 } 1092 1093 #ifdef CONFIG_COMPAT 1094 1095 static int get_urb32(struct usbdevfs_urb *kurb, 1096 struct usbdevfs_urb32 __user *uurb) 1097 { 1098 __u32 uptr; 1099 if (get_user(kurb->type, &uurb->type) || 1100 __get_user(kurb->endpoint, &uurb->endpoint) || 1101 __get_user(kurb->status, &uurb->status) || 1102 __get_user(kurb->flags, &uurb->flags) || 1103 __get_user(kurb->buffer_length, &uurb->buffer_length) || 1104 __get_user(kurb->actual_length, &uurb->actual_length) || 1105 __get_user(kurb->start_frame, &uurb->start_frame) || 1106 __get_user(kurb->number_of_packets, &uurb->number_of_packets) || 1107 __get_user(kurb->error_count, &uurb->error_count) || 1108 __get_user(kurb->signr, &uurb->signr)) 1109 return -EFAULT; 1110 1111 if (__get_user(uptr, &uurb->buffer)) 1112 return -EFAULT; 1113 kurb->buffer = compat_ptr(uptr); 1114 if (__get_user(uptr, &uurb->buffer)) 1115 return -EFAULT; 1116 kurb->usercontext = compat_ptr(uptr); 1117 1118 return 0; 1119 } 1120 1121 static int proc_submiturb_compat(struct dev_state *ps, void __user *arg) 1122 { 1123 struct usbdevfs_urb uurb; 1124 1125 if (get_urb32(&uurb,(struct usbdevfs_urb32 *)arg)) 1126 return -EFAULT; 1127 1128 return proc_do_submiturb(ps, &uurb, ((struct usbdevfs_urb32 __user *)arg)->iso_frame_desc, arg); 1129 } 1130 1131 static int processcompl_compat(struct async *as, void __user * __user *arg) 1132 { 1133 struct urb *urb = as->urb; 1134 struct usbdevfs_urb32 __user *userurb = as->userurb; 1135 void __user *addr = as->userurb; 1136 unsigned int i; 1137 1138 if (as->userbuffer) 1139 if (copy_to_user(as->userbuffer, urb->transfer_buffer, urb->transfer_buffer_length)) 1140 return -EFAULT; 1141 if (put_user(urb->status, &userurb->status)) 1142 return -EFAULT; 1143 if (put_user(urb->actual_length, &userurb->actual_length)) 1144 return -EFAULT; 1145 if (put_user(urb->error_count, &userurb->error_count)) 1146 return -EFAULT; 1147 1148 if (usb_pipeisoc(urb->pipe)) { 1149 for (i = 0; i < urb->number_of_packets; i++) { 1150 if (put_user(urb->iso_frame_desc[i].actual_length, 1151 &userurb->iso_frame_desc[i].actual_length)) 1152 return -EFAULT; 1153 if (put_user(urb->iso_frame_desc[i].status, 1154 &userurb->iso_frame_desc[i].status)) 1155 return -EFAULT; 1156 } 1157 } 1158 1159 free_async(as); 1160 if (put_user((u32)(u64)addr, (u32 __user *)arg)) 1161 return -EFAULT; 1162 return 0; 1163 } 1164 1165 static int proc_reapurb_compat(struct dev_state *ps, void __user *arg) 1166 { 1167 struct async *as = reap_as(ps); 1168 if (as) 1169 return processcompl_compat(as, (void __user * __user *)arg); 1170 if (signal_pending(current)) 1171 return -EINTR; 1172 return -EIO; 1173 } 1174 1175 static int proc_reapurbnonblock_compat(struct dev_state *ps, void __user *arg) 1176 { 1177 struct async *as; 1178 1179 if (!(as = async_getcompleted(ps))) 1180 return -EAGAIN; 1181 return processcompl_compat(as, (void __user * __user *)arg); 1182 } 1183 1184 #endif 1185 1186 static int proc_disconnectsignal(struct dev_state *ps, void __user *arg) 1187 { 1188 struct usbdevfs_disconnectsignal ds; 1189 1190 if (copy_from_user(&ds, arg, sizeof(ds))) 1191 return -EFAULT; 1192 if (ds.signr != 0 && (ds.signr < SIGRTMIN || ds.signr > SIGRTMAX)) 1193 return -EINVAL; 1194 ps->discsignr = ds.signr; 1195 ps->disccontext = ds.context; 1196 return 0; 1197 } 1198 1199 static int proc_claiminterface(struct dev_state *ps, void __user *arg) 1200 { 1201 unsigned int ifnum; 1202 1203 if (get_user(ifnum, (unsigned int __user *)arg)) 1204 return -EFAULT; 1205 return claimintf(ps, ifnum); 1206 } 1207 1208 static int proc_releaseinterface(struct dev_state *ps, void __user *arg) 1209 { 1210 unsigned int ifnum; 1211 int ret; 1212 1213 if (get_user(ifnum, (unsigned int __user *)arg)) 1214 return -EFAULT; 1215 if ((ret = releaseintf(ps, ifnum)) < 0) 1216 return ret; 1217 destroy_async_on_interface (ps, ifnum); 1218 return 0; 1219 } 1220 1221 static int proc_ioctl (struct dev_state *ps, void __user *arg) 1222 { 1223 struct usbdevfs_ioctl ctrl; 1224 int size; 1225 void *buf = NULL; 1226 int retval = 0; 1227 struct usb_interface *intf = NULL; 1228 struct usb_driver *driver = NULL; 1229 int i; 1230 1231 /* get input parameters and alloc buffer */ 1232 if (copy_from_user(&ctrl, arg, sizeof (ctrl))) 1233 return -EFAULT; 1234 if ((size = _IOC_SIZE (ctrl.ioctl_code)) > 0) { 1235 if ((buf = kmalloc (size, GFP_KERNEL)) == NULL) 1236 return -ENOMEM; 1237 if ((_IOC_DIR(ctrl.ioctl_code) & _IOC_WRITE)) { 1238 if (copy_from_user (buf, ctrl.data, size)) { 1239 kfree(buf); 1240 return -EFAULT; 1241 } 1242 } else { 1243 memset (buf, 0, size); 1244 } 1245 } 1246 1247 if (!connected(ps->dev)) { 1248 kfree(buf); 1249 return -ENODEV; 1250 } 1251 1252 if (ps->dev->state != USB_STATE_CONFIGURED) 1253 retval = -EHOSTUNREACH; 1254 else if (!(intf = usb_ifnum_to_if (ps->dev, ctrl.ifno))) 1255 retval = -EINVAL; 1256 else switch (ctrl.ioctl_code) { 1257 1258 /* disconnect kernel driver from interface */ 1259 case USBDEVFS_DISCONNECT: 1260 1261 /* don't allow the user to unbind the hub driver from 1262 * a hub with children to manage */ 1263 for (i = 0; i < ps->dev->maxchild; ++i) { 1264 if (ps->dev->children[i]) 1265 retval = -EBUSY; 1266 } 1267 if (retval) 1268 break; 1269 1270 down_write(&usb_bus_type.subsys.rwsem); 1271 if (intf->dev.driver) { 1272 driver = to_usb_driver(intf->dev.driver); 1273 dev_dbg (&intf->dev, "disconnect by usbfs\n"); 1274 usb_driver_release_interface(driver, intf); 1275 } else 1276 retval = -ENODATA; 1277 up_write(&usb_bus_type.subsys.rwsem); 1278 break; 1279 1280 /* let kernel drivers try to (re)bind to the interface */ 1281 case USBDEVFS_CONNECT: 1282 usb_unlock_device(ps->dev); 1283 usb_lock_all_devices(); 1284 bus_rescan_devices(intf->dev.bus); 1285 usb_unlock_all_devices(); 1286 usb_lock_device(ps->dev); 1287 break; 1288 1289 /* talk directly to the interface's driver */ 1290 default: 1291 down_read(&usb_bus_type.subsys.rwsem); 1292 if (intf->dev.driver) 1293 driver = to_usb_driver(intf->dev.driver); 1294 if (driver == NULL || driver->ioctl == NULL) { 1295 retval = -ENOTTY; 1296 } else { 1297 retval = driver->ioctl (intf, ctrl.ioctl_code, buf); 1298 if (retval == -ENOIOCTLCMD) 1299 retval = -ENOTTY; 1300 } 1301 up_read(&usb_bus_type.subsys.rwsem); 1302 } 1303 1304 /* cleanup and return */ 1305 if (retval >= 0 1306 && (_IOC_DIR (ctrl.ioctl_code) & _IOC_READ) != 0 1307 && size > 0 1308 && copy_to_user (ctrl.data, buf, size) != 0) 1309 retval = -EFAULT; 1310 1311 kfree(buf); 1312 return retval; 1313 } 1314 1315 /* 1316 * NOTE: All requests here that have interface numbers as parameters 1317 * are assuming that somehow the configuration has been prevented from 1318 * changing. But there's no mechanism to ensure that... 1319 */ 1320 static int usbdev_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg) 1321 { 1322 struct dev_state *ps = (struct dev_state *)file->private_data; 1323 struct usb_device *dev = ps->dev; 1324 void __user *p = (void __user *)arg; 1325 int ret = -ENOTTY; 1326 1327 if (!(file->f_mode & FMODE_WRITE)) 1328 return -EPERM; 1329 usb_lock_device(dev); 1330 if (!connected(dev)) { 1331 usb_unlock_device(dev); 1332 return -ENODEV; 1333 } 1334 1335 switch (cmd) { 1336 case USBDEVFS_CONTROL: 1337 snoop(&dev->dev, "%s: CONTROL\n", __FUNCTION__); 1338 ret = proc_control(ps, p); 1339 if (ret >= 0) 1340 inode->i_mtime = CURRENT_TIME; 1341 break; 1342 1343 case USBDEVFS_BULK: 1344 snoop(&dev->dev, "%s: BULK\n", __FUNCTION__); 1345 ret = proc_bulk(ps, p); 1346 if (ret >= 0) 1347 inode->i_mtime = CURRENT_TIME; 1348 break; 1349 1350 case USBDEVFS_RESETEP: 1351 snoop(&dev->dev, "%s: RESETEP\n", __FUNCTION__); 1352 ret = proc_resetep(ps, p); 1353 if (ret >= 0) 1354 inode->i_mtime = CURRENT_TIME; 1355 break; 1356 1357 case USBDEVFS_RESET: 1358 snoop(&dev->dev, "%s: RESET\n", __FUNCTION__); 1359 ret = proc_resetdevice(ps); 1360 break; 1361 1362 case USBDEVFS_CLEAR_HALT: 1363 snoop(&dev->dev, "%s: CLEAR_HALT\n", __FUNCTION__); 1364 ret = proc_clearhalt(ps, p); 1365 if (ret >= 0) 1366 inode->i_mtime = CURRENT_TIME; 1367 break; 1368 1369 case USBDEVFS_GETDRIVER: 1370 snoop(&dev->dev, "%s: GETDRIVER\n", __FUNCTION__); 1371 ret = proc_getdriver(ps, p); 1372 break; 1373 1374 case USBDEVFS_CONNECTINFO: 1375 snoop(&dev->dev, "%s: CONNECTINFO\n", __FUNCTION__); 1376 ret = proc_connectinfo(ps, p); 1377 break; 1378 1379 case USBDEVFS_SETINTERFACE: 1380 snoop(&dev->dev, "%s: SETINTERFACE\n", __FUNCTION__); 1381 ret = proc_setintf(ps, p); 1382 break; 1383 1384 case USBDEVFS_SETCONFIGURATION: 1385 snoop(&dev->dev, "%s: SETCONFIGURATION\n", __FUNCTION__); 1386 ret = proc_setconfig(ps, p); 1387 break; 1388 1389 case USBDEVFS_SUBMITURB: 1390 snoop(&dev->dev, "%s: SUBMITURB\n", __FUNCTION__); 1391 ret = proc_submiturb(ps, p); 1392 if (ret >= 0) 1393 inode->i_mtime = CURRENT_TIME; 1394 break; 1395 1396 #ifdef CONFIG_COMPAT 1397 1398 case USBDEVFS_SUBMITURB32: 1399 snoop(&dev->dev, "%s: SUBMITURB32\n", __FUNCTION__); 1400 ret = proc_submiturb_compat(ps, p); 1401 if (ret >= 0) 1402 inode->i_mtime = CURRENT_TIME; 1403 break; 1404 1405 case USBDEVFS_REAPURB32: 1406 snoop(&dev->dev, "%s: REAPURB32\n", __FUNCTION__); 1407 ret = proc_reapurb_compat(ps, p); 1408 break; 1409 1410 case USBDEVFS_REAPURBNDELAY32: 1411 snoop(&dev->dev, "%s: REAPURBDELAY32\n", __FUNCTION__); 1412 ret = proc_reapurbnonblock_compat(ps, p); 1413 break; 1414 1415 #endif 1416 1417 case USBDEVFS_DISCARDURB: 1418 snoop(&dev->dev, "%s: DISCARDURB\n", __FUNCTION__); 1419 ret = proc_unlinkurb(ps, p); 1420 break; 1421 1422 case USBDEVFS_REAPURB: 1423 snoop(&dev->dev, "%s: REAPURB\n", __FUNCTION__); 1424 ret = proc_reapurb(ps, p); 1425 break; 1426 1427 case USBDEVFS_REAPURBNDELAY: 1428 snoop(&dev->dev, "%s: REAPURBDELAY\n", __FUNCTION__); 1429 ret = proc_reapurbnonblock(ps, p); 1430 break; 1431 1432 case USBDEVFS_DISCSIGNAL: 1433 snoop(&dev->dev, "%s: DISCSIGNAL\n", __FUNCTION__); 1434 ret = proc_disconnectsignal(ps, p); 1435 break; 1436 1437 case USBDEVFS_CLAIMINTERFACE: 1438 snoop(&dev->dev, "%s: CLAIMINTERFACE\n", __FUNCTION__); 1439 ret = proc_claiminterface(ps, p); 1440 break; 1441 1442 case USBDEVFS_RELEASEINTERFACE: 1443 snoop(&dev->dev, "%s: RELEASEINTERFACE\n", __FUNCTION__); 1444 ret = proc_releaseinterface(ps, p); 1445 break; 1446 1447 case USBDEVFS_IOCTL: 1448 snoop(&dev->dev, "%s: IOCTL\n", __FUNCTION__); 1449 ret = proc_ioctl(ps, p); 1450 break; 1451 } 1452 usb_unlock_device(dev); 1453 if (ret >= 0) 1454 inode->i_atime = CURRENT_TIME; 1455 return ret; 1456 } 1457 1458 /* No kernel lock - fine */ 1459 static unsigned int usbdev_poll(struct file *file, struct poll_table_struct *wait) 1460 { 1461 struct dev_state *ps = (struct dev_state *)file->private_data; 1462 unsigned int mask = 0; 1463 1464 poll_wait(file, &ps->wait, wait); 1465 if (file->f_mode & FMODE_WRITE && !list_empty(&ps->async_completed)) 1466 mask |= POLLOUT | POLLWRNORM; 1467 if (!connected(ps->dev)) 1468 mask |= POLLERR | POLLHUP; 1469 return mask; 1470 } 1471 1472 struct file_operations usbfs_device_file_operations = { 1473 .llseek = usbdev_lseek, 1474 .read = usbdev_read, 1475 .poll = usbdev_poll, 1476 .ioctl = usbdev_ioctl, 1477 .open = usbdev_open, 1478 .release = usbdev_release, 1479 }; 1480