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kbuild: document howto build external modules using several directories
[linux-2.6/verdex.git] / drivers / usb / core / devio.c
blob2b68998fe4b34fd0809f1dab9b4f078f7243306f
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 * 30.09.2005 0.3 Fix user-triggerable oops in async URB delivery
34 * (CAN-2005-3055)
35 */
36
37 /*****************************************************************************/
38
39 #include <linux/fs.h>
40 #include <linux/mm.h>
41 #include <linux/slab.h>
42 #include <linux/smp_lock.h>
43 #include <linux/signal.h>
44 #include <linux/poll.h>
45 #include <linux/module.h>
46 #include <linux/usb.h>
47 #include <linux/usbdevice_fs.h>
48 #include <linux/cdev.h>
49 #include <linux/notifier.h>
50 #include <asm/uaccess.h>
51 #include <asm/byteorder.h>
52 #include <linux/moduleparam.h>
53
54 #include "hcd.h" /* for usbcore internals */
55 #include "usb.h"
56
57 #define USB_MAXBUS 64
58 #define USB_DEVICE_MAX USB_MAXBUS * 128
59 static struct class *usb_device_class;
60
61 struct async {
62 struct list_head asynclist;
63 struct dev_state *ps;
64 pid_t pid;
65 uid_t uid, euid;
66 unsigned int signr;
67 unsigned int ifnum;
68 void __user *userbuffer;
69 void __user *userurb;
70 struct urb *urb;
71 };
72
73 static int usbfs_snoop = 0;
74 module_param (usbfs_snoop, bool, S_IRUGO | S_IWUSR);
75 MODULE_PARM_DESC (usbfs_snoop, "true to log all usbfs traffic");
76
77 #define snoop(dev, format, arg...) \
78 do { \
79 if (usbfs_snoop) \
80 dev_info( dev , format , ## arg); \
81 } while (0)
82
83 #define USB_DEVICE_DEV MKDEV(USB_DEVICE_MAJOR, 0)
84
85
86 #define MAX_USBFS_BUFFER_SIZE 16384
87
88 static inline int connected (struct usb_device *dev)
89 {
90 return dev->state != USB_STATE_NOTATTACHED;
91 }
92
93 static loff_t usbdev_lseek(struct file *file, loff_t offset, int orig)
94 {
95 loff_t ret;
96
97 lock_kernel();
98
99 switch (orig) {
100 case 0:
101 file->f_pos = offset;
102 ret = file->f_pos;
103 break;
104 case 1:
105 file->f_pos += offset;
106 ret = file->f_pos;
107 break;
108 case 2:
109 default:
110 ret = -EINVAL;
111 }
112
113 unlock_kernel();
114 return ret;
115 }
116
117 static ssize_t usbdev_read(struct file *file, char __user *buf, size_t nbytes, loff_t *ppos)
118 {
119 struct dev_state *ps = (struct dev_state *)file->private_data;
120 struct usb_device *dev = ps->dev;
121 ssize_t ret = 0;
122 unsigned len;
123 loff_t pos;
124 int i;
125
126 pos = *ppos;
127 usb_lock_device(dev);
128 if (!connected(dev)) {
129 ret = -ENODEV;
130 goto err;
131 } else if (pos < 0) {
132 ret = -EINVAL;
133 goto err;
134 }
135
136 if (pos < sizeof(struct usb_device_descriptor)) {
137 struct usb_device_descriptor *desc = kmalloc(sizeof(*desc), GFP_KERNEL);
138 if (!desc) {
139 ret = -ENOMEM;
140 goto err;
141 }
142 memcpy(desc, &dev->descriptor, sizeof(dev->descriptor));
143 le16_to_cpus(&desc->bcdUSB);
144 le16_to_cpus(&desc->idVendor);
145 le16_to_cpus(&desc->idProduct);
146 le16_to_cpus(&desc->bcdDevice);
147
148 len = sizeof(struct usb_device_descriptor) - pos;
149 if (len > nbytes)
150 len = nbytes;
151 if (copy_to_user(buf, ((char *)desc) + pos, len)) {
152 kfree(desc);
153 ret = -EFAULT;
154 goto err;
155 }
156 kfree(desc);
157
158 *ppos += len;
159 buf += len;
160 nbytes -= len;
161 ret += len;
162 }
163
164 pos = sizeof(struct usb_device_descriptor);
165 for (i = 0; nbytes && i < dev->descriptor.bNumConfigurations; i++) {
166 struct usb_config_descriptor *config =
167 (struct usb_config_descriptor *)dev->rawdescriptors[i];
168 unsigned int length = le16_to_cpu(config->wTotalLength);
169
170 if (*ppos < pos + length) {
171
172 /* The descriptor may claim to be longer than it
173 * really is. Here is the actual allocated length. */
174 unsigned alloclen =
175 le16_to_cpu(dev->config[i].desc.wTotalLength);
176
177 len = length - (*ppos - pos);
178 if (len > nbytes)
179 len = nbytes;
180
181 /* Simply don't write (skip over) unallocated parts */
182 if (alloclen > (*ppos - pos)) {
183 alloclen -= (*ppos - pos);
184 if (copy_to_user(buf,
185 dev->rawdescriptors[i] + (*ppos - pos),
186 min(len, alloclen))) {
187 ret = -EFAULT;
188 goto err;
189 }
190 }
191
192 *ppos += len;
193 buf += len;
194 nbytes -= len;
195 ret += len;
196 }
197
198 pos += length;
199 }
200
201 err:
202 usb_unlock_device(dev);
203 return ret;
204 }
205
206 /*
207 * async list handling
208 */
209
210 static struct async *alloc_async(unsigned int numisoframes)
211 {
212 unsigned int assize = sizeof(struct async) + numisoframes * sizeof(struct usb_iso_packet_descriptor);
213 struct async *as = kzalloc(assize, GFP_KERNEL);
214
215 if (!as)
216 return NULL;
217 as->urb = usb_alloc_urb(numisoframes, GFP_KERNEL);
218 if (!as->urb) {
219 kfree(as);
220 return NULL;
221 }
222 return as;
223 }
224
225 static void free_async(struct async *as)
226 {
227 kfree(as->urb->transfer_buffer);
228 kfree(as->urb->setup_packet);
229 usb_free_urb(as->urb);
230 kfree(as);
231 }
232
233 static inline void async_newpending(struct async *as)
234 {
235 struct dev_state *ps = as->ps;
236 unsigned long flags;
237
238 spin_lock_irqsave(&ps->lock, flags);
239 list_add_tail(&as->asynclist, &ps->async_pending);
240 spin_unlock_irqrestore(&ps->lock, flags);
241 }
242
243 static inline void async_removepending(struct async *as)
244 {
245 struct dev_state *ps = as->ps;
246 unsigned long flags;
247
248 spin_lock_irqsave(&ps->lock, flags);
249 list_del_init(&as->asynclist);
250 spin_unlock_irqrestore(&ps->lock, flags);
251 }
252
253 static inline struct async *async_getcompleted(struct dev_state *ps)
254 {
255 unsigned long flags;
256 struct async *as = NULL;
257
258 spin_lock_irqsave(&ps->lock, flags);
259 if (!list_empty(&ps->async_completed)) {
260 as = list_entry(ps->async_completed.next, struct async, asynclist);
261 list_del_init(&as->asynclist);
262 }
263 spin_unlock_irqrestore(&ps->lock, flags);
264 return as;
265 }
266
267 static inline struct async *async_getpending(struct dev_state *ps, void __user *userurb)
268 {
269 unsigned long flags;
270 struct async *as;
271
272 spin_lock_irqsave(&ps->lock, flags);
273 list_for_each_entry(as, &ps->async_pending, asynclist)
274 if (as->userurb == userurb) {
275 list_del_init(&as->asynclist);
276 spin_unlock_irqrestore(&ps->lock, flags);
277 return as;
278 }
279 spin_unlock_irqrestore(&ps->lock, flags);
280 return NULL;
281 }
282
283 static void snoop_urb(struct urb *urb, void __user *userurb)
284 {
285 int j;
286 unsigned char *data = urb->transfer_buffer;
287
288 if (!usbfs_snoop)
289 return;
290
291 if (urb->pipe & USB_DIR_IN)
292 dev_info(&urb->dev->dev, "direction=IN\n");
293 else
294 dev_info(&urb->dev->dev, "direction=OUT\n");
295 dev_info(&urb->dev->dev, "userurb=%p\n", userurb);
296 dev_info(&urb->dev->dev, "transfer_buffer_length=%d\n",
297 urb->transfer_buffer_length);
298 dev_info(&urb->dev->dev, "actual_length=%d\n", urb->actual_length);
299 dev_info(&urb->dev->dev, "data: ");
300 for (j = 0; j < urb->transfer_buffer_length; ++j)
301 printk ("%02x ", data[j]);
302 printk("\n");
303 }
304
305 static void async_completed(struct urb *urb, struct pt_regs *regs)
306 {
307 struct async *as = (struct async *)urb->context;
308 struct dev_state *ps = as->ps;
309 struct siginfo sinfo;
310
311 spin_lock(&ps->lock);
312 list_move_tail(&as->asynclist, &ps->async_completed);
313 spin_unlock(&ps->lock);
314 if (as->signr) {
315 sinfo.si_signo = as->signr;
316 sinfo.si_errno = as->urb->status;
317 sinfo.si_code = SI_ASYNCIO;
318 sinfo.si_addr = as->userurb;
319 kill_proc_info_as_uid(as->signr, &sinfo, as->pid, as->uid,
320 as->euid);
321 }
322 snoop(&urb->dev->dev, "urb complete\n");
323 snoop_urb(urb, as->userurb);
324 wake_up(&ps->wait);
325 }
326
327 static void destroy_async (struct dev_state *ps, struct list_head *list)
328 {
329 struct async *as;
330 unsigned long flags;
331
332 spin_lock_irqsave(&ps->lock, flags);
333 while (!list_empty(list)) {
334 as = list_entry(list->next, struct async, asynclist);
335 list_del_init(&as->asynclist);
336
337 /* drop the spinlock so the completion handler can run */
338 spin_unlock_irqrestore(&ps->lock, flags);
339 usb_kill_urb(as->urb);
340 spin_lock_irqsave(&ps->lock, flags);
341 }
342 spin_unlock_irqrestore(&ps->lock, flags);
343 as = async_getcompleted(ps);
344 while (as) {
345 free_async(as);
346 as = async_getcompleted(ps);
347 }
348 }
349
350 static void destroy_async_on_interface (struct dev_state *ps, unsigned int ifnum)
351 {
352 struct list_head *p, *q, hitlist;
353 unsigned long flags;
354
355 INIT_LIST_HEAD(&hitlist);
356 spin_lock_irqsave(&ps->lock, flags);
357 list_for_each_safe(p, q, &ps->async_pending)
358 if (ifnum == list_entry(p, struct async, asynclist)->ifnum)
359 list_move_tail(p, &hitlist);
360 spin_unlock_irqrestore(&ps->lock, flags);
361 destroy_async(ps, &hitlist);
362 }
363
364 static inline void destroy_all_async(struct dev_state *ps)
365 {
366 destroy_async(ps, &ps->async_pending);
367 }
368
369 /*
370 * interface claims are made only at the request of user level code,
371 * which can also release them (explicitly or by closing files).
372 * they're also undone when devices disconnect.
373 */
374
375 static int driver_probe (struct usb_interface *intf,
376 const struct usb_device_id *id)
377 {
378 return -ENODEV;
379 }
380
381 static void driver_disconnect(struct usb_interface *intf)
382 {
383 struct dev_state *ps = usb_get_intfdata (intf);
384 unsigned int ifnum = intf->altsetting->desc.bInterfaceNumber;
385
386 if (!ps)
387 return;
388
389 /* NOTE: this relies on usbcore having canceled and completed
390 * all pending I/O requests; 2.6 does that.
391 */
392
393 if (likely(ifnum < 8*sizeof(ps->ifclaimed)))
394 clear_bit(ifnum, &ps->ifclaimed);
395 else
396 warn("interface number %u out of range", ifnum);
397
398 usb_set_intfdata (intf, NULL);
399
400 /* force async requests to complete */
401 destroy_async_on_interface(ps, ifnum);
402 }
403
404 struct usb_driver usbfs_driver = {
405 .name = "usbfs",
406 .probe = driver_probe,
407 .disconnect = driver_disconnect,
408 };
409
410 static int claimintf(struct dev_state *ps, unsigned int ifnum)
411 {
412 struct usb_device *dev = ps->dev;
413 struct usb_interface *intf;
414 int err;
415
416 if (ifnum >= 8*sizeof(ps->ifclaimed))
417 return -EINVAL;
418 /* already claimed */
419 if (test_bit(ifnum, &ps->ifclaimed))
420 return 0;
421
422 /* lock against other changes to driver bindings */
423 down_write(&usb_bus_type.subsys.rwsem);
424 intf = usb_ifnum_to_if(dev, ifnum);
425 if (!intf)
426 err = -ENOENT;
427 else
428 err = usb_driver_claim_interface(&usbfs_driver, intf, ps);
429 up_write(&usb_bus_type.subsys.rwsem);
430 if (err == 0)
431 set_bit(ifnum, &ps->ifclaimed);
432 return err;
433 }
434
435 static int releaseintf(struct dev_state *ps, unsigned int ifnum)
436 {
437 struct usb_device *dev;
438 struct usb_interface *intf;
439 int err;
440
441 err = -EINVAL;
442 if (ifnum >= 8*sizeof(ps->ifclaimed))
443 return err;
444 dev = ps->dev;
445 /* lock against other changes to driver bindings */
446 down_write(&usb_bus_type.subsys.rwsem);
447 intf = usb_ifnum_to_if(dev, ifnum);
448 if (!intf)
449 err = -ENOENT;
450 else if (test_and_clear_bit(ifnum, &ps->ifclaimed)) {
451 usb_driver_release_interface(&usbfs_driver, intf);
452 err = 0;
453 }
454 up_write(&usb_bus_type.subsys.rwsem);
455 return err;
456 }
457
458 static int checkintf(struct dev_state *ps, unsigned int ifnum)
459 {
460 if (ps->dev->state != USB_STATE_CONFIGURED)
461 return -EHOSTUNREACH;
462 if (ifnum >= 8*sizeof(ps->ifclaimed))
463 return -EINVAL;
464 if (test_bit(ifnum, &ps->ifclaimed))
465 return 0;
466 /* if not yet claimed, claim it for the driver */
467 dev_warn(&ps->dev->dev, "usbfs: process %d (%s) did not claim interface %u before use\n",
468 current->pid, current->comm, ifnum);
469 return claimintf(ps, ifnum);
470 }
471
472 static int findintfep(struct usb_device *dev, unsigned int ep)
473 {
474 unsigned int i, j, e;
475 struct usb_interface *intf;
476 struct usb_host_interface *alts;
477 struct usb_endpoint_descriptor *endpt;
478
479 if (ep & ~(USB_DIR_IN|0xf))
480 return -EINVAL;
481 if (!dev->actconfig)
482 return -ESRCH;
483 for (i = 0; i < dev->actconfig->desc.bNumInterfaces; i++) {
484 intf = dev->actconfig->interface[i];
485 for (j = 0; j < intf->num_altsetting; j++) {
486 alts = &intf->altsetting[j];
487 for (e = 0; e < alts->desc.bNumEndpoints; e++) {
488 endpt = &alts->endpoint[e].desc;
489 if (endpt->bEndpointAddress == ep)
490 return alts->desc.bInterfaceNumber;
491 }
492 }
493 }
494 return -ENOENT;
495 }
496
497 static int check_ctrlrecip(struct dev_state *ps, unsigned int requesttype, unsigned int index)
498 {
499 int ret = 0;
500
501 if (ps->dev->state != USB_STATE_CONFIGURED)
502 return -EHOSTUNREACH;
503 if (USB_TYPE_VENDOR == (USB_TYPE_MASK & requesttype))
504 return 0;
505
506 index &= 0xff;
507 switch (requesttype & USB_RECIP_MASK) {
508 case USB_RECIP_ENDPOINT:
509 if ((ret = findintfep(ps->dev, index)) >= 0)
510 ret = checkintf(ps, ret);
511 break;
512
513 case USB_RECIP_INTERFACE:
514 ret = checkintf(ps, index);
515 break;
516 }
517 return ret;
518 }
519
520 static struct usb_device *usbdev_lookup_minor(int minor)
521 {
522 struct class_device *class_dev;
523 struct usb_device *dev = NULL;
524
525 down(&usb_device_class->sem);
526 list_for_each_entry(class_dev, &usb_device_class->children, node) {
527 if (class_dev->devt == MKDEV(USB_DEVICE_MAJOR, minor)) {
528 dev = class_dev->class_data;
529 break;
530 }
531 }
532 up(&usb_device_class->sem);
533
534 return dev;
535 };
536
537 /*
538 * file operations
539 */
540 static int usbdev_open(struct inode *inode, struct file *file)
541 {
542 struct usb_device *dev = NULL;
543 struct dev_state *ps;
544 int ret;
545
546 /*
547 * no locking necessary here, as chrdev_open has the kernel lock
548 * (still acquire the kernel lock for safety)
549 */
550 ret = -ENOMEM;
551 if (!(ps = kmalloc(sizeof(struct dev_state), GFP_KERNEL)))
552 goto out_nolock;
553
554 lock_kernel();
555 ret = -ENOENT;
556 /* check if we are called from a real node or usbfs */
557 if (imajor(inode) == USB_DEVICE_MAJOR)
558 dev = usbdev_lookup_minor(iminor(inode));
559 if (!dev)
560 dev = inode->u.generic_ip;
561 if (!dev) {
562 kfree(ps);
563 goto out;
564 }
565 usb_get_dev(dev);
566 ret = 0;
567 ps->dev = dev;
568 ps->file = file;
569 spin_lock_init(&ps->lock);
570 INIT_LIST_HEAD(&ps->async_pending);
571 INIT_LIST_HEAD(&ps->async_completed);
572 init_waitqueue_head(&ps->wait);
573 ps->discsignr = 0;
574 ps->disc_pid = current->pid;
575 ps->disc_uid = current->uid;
576 ps->disc_euid = current->euid;
577 ps->disccontext = NULL;
578 ps->ifclaimed = 0;
579 wmb();
580 list_add_tail(&ps->list, &dev->filelist);
581 file->private_data = ps;
582 out:
583 unlock_kernel();
584 out_nolock:
585 return ret;
586 }
587
588 static int usbdev_release(struct inode *inode, struct file *file)
589 {
590 struct dev_state *ps = (struct dev_state *)file->private_data;
591 struct usb_device *dev = ps->dev;
592 unsigned int ifnum;
593
594 usb_lock_device(dev);
595 list_del_init(&ps->list);
596 for (ifnum = 0; ps->ifclaimed && ifnum < 8*sizeof(ps->ifclaimed);
597 ifnum++) {
598 if (test_bit(ifnum, &ps->ifclaimed))
599 releaseintf(ps, ifnum);
600 }
601 destroy_all_async(ps);
602 usb_unlock_device(dev);
603 usb_put_dev(dev);
604 ps->dev = NULL;
605 kfree(ps);
606 return 0;
607 }
608
609 static int proc_control(struct dev_state *ps, void __user *arg)
610 {
611 struct usb_device *dev = ps->dev;
612 struct usbdevfs_ctrltransfer ctrl;
613 unsigned int tmo;
614 unsigned char *tbuf;
615 int i, j, ret;
616
617 if (copy_from_user(&ctrl, arg, sizeof(ctrl)))
618 return -EFAULT;
619 if ((ret = check_ctrlrecip(ps, ctrl.bRequestType, ctrl.wIndex)))
620 return ret;
621 if (ctrl.wLength > PAGE_SIZE)
622 return -EINVAL;
623 if (!(tbuf = (unsigned char *)__get_free_page(GFP_KERNEL)))
624 return -ENOMEM;
625 tmo = ctrl.timeout;
626 if (ctrl.bRequestType & 0x80) {
627 if (ctrl.wLength && !access_ok(VERIFY_WRITE, ctrl.data, ctrl.wLength)) {
628 free_page((unsigned long)tbuf);
629 return -EINVAL;
630 }
631 snoop(&dev->dev, "control read: bRequest=%02x "
632 "bRrequestType=%02x wValue=%04x "
633 "wIndex=%04x wLength=%04x\n",
634 ctrl.bRequest, ctrl.bRequestType, ctrl.wValue,
635 ctrl.wIndex, ctrl.wLength);
636
637 usb_unlock_device(dev);
638 i = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), ctrl.bRequest, ctrl.bRequestType,
639 ctrl.wValue, ctrl.wIndex, tbuf, ctrl.wLength, tmo);
640 usb_lock_device(dev);
641 if ((i > 0) && ctrl.wLength) {
642 if (usbfs_snoop) {
643 dev_info(&dev->dev, "control read: data ");
644 for (j = 0; j < i; ++j)
645 printk("%02x ", (unsigned char)(tbuf)[j]);
646 printk("\n");
647 }
648 if (copy_to_user(ctrl.data, tbuf, i)) {
649 free_page((unsigned long)tbuf);
650 return -EFAULT;
651 }
652 }
653 } else {
654 if (ctrl.wLength) {
655 if (copy_from_user(tbuf, ctrl.data, ctrl.wLength)) {
656 free_page((unsigned long)tbuf);
657 return -EFAULT;
658 }
659 }
660 snoop(&dev->dev, "control write: bRequest=%02x "
661 "bRrequestType=%02x wValue=%04x "
662 "wIndex=%04x wLength=%04x\n",
663 ctrl.bRequest, ctrl.bRequestType, ctrl.wValue,
664 ctrl.wIndex, ctrl.wLength);
665 if (usbfs_snoop) {
666 dev_info(&dev->dev, "control write: data: ");
667 for (j = 0; j < ctrl.wLength; ++j)
668 printk("%02x ", (unsigned char)(tbuf)[j]);
669 printk("\n");
670 }
671 usb_unlock_device(dev);
672 i = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), ctrl.bRequest, ctrl.bRequestType,
673 ctrl.wValue, ctrl.wIndex, tbuf, ctrl.wLength, tmo);
674 usb_lock_device(dev);
675 }
676 free_page((unsigned long)tbuf);
677 if (i<0 && i != -EPIPE) {
678 dev_printk(KERN_DEBUG, &dev->dev, "usbfs: USBDEVFS_CONTROL "
679 "failed cmd %s rqt %u rq %u len %u ret %d\n",
680 current->comm, ctrl.bRequestType, ctrl.bRequest,
681 ctrl.wLength, i);
682 }
683 return i;
684 }
685
686 static int proc_bulk(struct dev_state *ps, void __user *arg)
687 {
688 struct usb_device *dev = ps->dev;
689 struct usbdevfs_bulktransfer bulk;
690 unsigned int tmo, len1, pipe;
691 int len2;
692 unsigned char *tbuf;
693 int i, j, ret;
694
695 if (copy_from_user(&bulk, arg, sizeof(bulk)))
696 return -EFAULT;
697 if ((ret = findintfep(ps->dev, bulk.ep)) < 0)
698 return ret;
699 if ((ret = checkintf(ps, ret)))
700 return ret;
701 if (bulk.ep & USB_DIR_IN)
702 pipe = usb_rcvbulkpipe(dev, bulk.ep & 0x7f);
703 else
704 pipe = usb_sndbulkpipe(dev, bulk.ep & 0x7f);
705 if (!usb_maxpacket(dev, pipe, !(bulk.ep & USB_DIR_IN)))
706 return -EINVAL;
707 len1 = bulk.len;
708 if (len1 > MAX_USBFS_BUFFER_SIZE)
709 return -EINVAL;
710 if (!(tbuf = kmalloc(len1, GFP_KERNEL)))
711 return -ENOMEM;
712 tmo = bulk.timeout;
713 if (bulk.ep & 0x80) {
714 if (len1 && !access_ok(VERIFY_WRITE, bulk.data, len1)) {
715 kfree(tbuf);
716 return -EINVAL;
717 }
718 snoop(&dev->dev, "bulk read: len=0x%02x timeout=%04d\n",
719 bulk.len, bulk.timeout);
720 usb_unlock_device(dev);
721 i = usb_bulk_msg(dev, pipe, tbuf, len1, &len2, tmo);
722 usb_lock_device(dev);
723 if (!i && len2) {
724 if (usbfs_snoop) {
725 dev_info(&dev->dev, "bulk read: data ");
726 for (j = 0; j < len2; ++j)
727 printk("%02x ", (unsigned char)(tbuf)[j]);
728 printk("\n");
729 }
730 if (copy_to_user(bulk.data, tbuf, len2)) {
731 kfree(tbuf);
732 return -EFAULT;
733 }
734 }
735 } else {
736 if (len1) {
737 if (copy_from_user(tbuf, bulk.data, len1)) {
738 kfree(tbuf);
739 return -EFAULT;
740 }
741 }
742 snoop(&dev->dev, "bulk write: len=0x%02x timeout=%04d\n",
743 bulk.len, bulk.timeout);
744 if (usbfs_snoop) {
745 dev_info(&dev->dev, "bulk write: data: ");
746 for (j = 0; j < len1; ++j)
747 printk("%02x ", (unsigned char)(tbuf)[j]);
748 printk("\n");
749 }
750 usb_unlock_device(dev);
751 i = usb_bulk_msg(dev, pipe, tbuf, len1, &len2, tmo);
752 usb_lock_device(dev);
753 }
754 kfree(tbuf);
755 if (i < 0)
756 return i;
757 return len2;
758 }
759
760 static int proc_resetep(struct dev_state *ps, void __user *arg)
761 {
762 unsigned int ep;
763 int ret;
764
765 if (get_user(ep, (unsigned int __user *)arg))
766 return -EFAULT;
767 if ((ret = findintfep(ps->dev, ep)) < 0)
768 return ret;
769 if ((ret = checkintf(ps, ret)))
770 return ret;
771 usb_settoggle(ps->dev, ep & 0xf, !(ep & USB_DIR_IN), 0);
772 return 0;
773 }
774
775 static int proc_clearhalt(struct dev_state *ps, void __user *arg)
776 {
777 unsigned int ep;
778 int pipe;
779 int ret;
780
781 if (get_user(ep, (unsigned int __user *)arg))
782 return -EFAULT;
783 if ((ret = findintfep(ps->dev, ep)) < 0)
784 return ret;
785 if ((ret = checkintf(ps, ret)))
786 return ret;
787 if (ep & USB_DIR_IN)
788 pipe = usb_rcvbulkpipe(ps->dev, ep & 0x7f);
789 else
790 pipe = usb_sndbulkpipe(ps->dev, ep & 0x7f);
791
792 return usb_clear_halt(ps->dev, pipe);
793 }
794
795
796 static int proc_getdriver(struct dev_state *ps, void __user *arg)
797 {
798 struct usbdevfs_getdriver gd;
799 struct usb_interface *intf;
800 int ret;
801
802 if (copy_from_user(&gd, arg, sizeof(gd)))
803 return -EFAULT;
804 down_read(&usb_bus_type.subsys.rwsem);
805 intf = usb_ifnum_to_if(ps->dev, gd.interface);
806 if (!intf || !intf->dev.driver)
807 ret = -ENODATA;
808 else {
809 strncpy(gd.driver, intf->dev.driver->name,
810 sizeof(gd.driver));
811 ret = (copy_to_user(arg, &gd, sizeof(gd)) ? -EFAULT : 0);
812 }
813 up_read(&usb_bus_type.subsys.rwsem);
814 return ret;
815 }
816
817 static int proc_connectinfo(struct dev_state *ps, void __user *arg)
818 {
819 struct usbdevfs_connectinfo ci;
820
821 ci.devnum = ps->dev->devnum;
822 ci.slow = ps->dev->speed == USB_SPEED_LOW;
823 if (copy_to_user(arg, &ci, sizeof(ci)))
824 return -EFAULT;
825 return 0;
826 }
827
828 static int proc_resetdevice(struct dev_state *ps)
829 {
830 return usb_reset_device(ps->dev);
831
832 }
833
834 static int proc_setintf(struct dev_state *ps, void __user *arg)
835 {
836 struct usbdevfs_setinterface setintf;
837 int ret;
838
839 if (copy_from_user(&setintf, arg, sizeof(setintf)))
840 return -EFAULT;
841 if ((ret = checkintf(ps, setintf.interface)))
842 return ret;
843 return usb_set_interface(ps->dev, setintf.interface,
844 setintf.altsetting);
845 }
846
847 static int proc_setconfig(struct dev_state *ps, void __user *arg)
848 {
849 unsigned int u;
850 int status = 0;
851 struct usb_host_config *actconfig;
852
853 if (get_user(u, (unsigned int __user *)arg))
854 return -EFAULT;
855
856 actconfig = ps->dev->actconfig;
857
858 /* Don't touch the device if any interfaces are claimed.
859 * It could interfere with other drivers' operations, and if
860 * an interface is claimed by usbfs it could easily deadlock.
861 */
862 if (actconfig) {
863 int i;
864
865 for (i = 0; i < actconfig->desc.bNumInterfaces; ++i) {
866 if (usb_interface_claimed(actconfig->interface[i])) {
867 dev_warn (&ps->dev->dev,
868 "usbfs: interface %d claimed by %s "
869 "while '%s' sets config #%d\n",
870 actconfig->interface[i]
871 ->cur_altsetting
872 ->desc.bInterfaceNumber,
873 actconfig->interface[i]
874 ->dev.driver->name,
875 current->comm, u);
876 status = -EBUSY;
877 break;
878 }
879 }
880 }
881
882 /* SET_CONFIGURATION is often abused as a "cheap" driver reset,
883 * so avoid usb_set_configuration()'s kick to sysfs
884 */
885 if (status == 0) {
886 if (actconfig && actconfig->desc.bConfigurationValue == u)
887 status = usb_reset_configuration(ps->dev);
888 else
889 status = usb_set_configuration(ps->dev, u);
890 }
891
892 return status;
893 }
894
895 static int proc_do_submiturb(struct dev_state *ps, struct usbdevfs_urb *uurb,
896 struct usbdevfs_iso_packet_desc __user *iso_frame_desc,
897 void __user *arg)
898 {
899 struct usbdevfs_iso_packet_desc *isopkt = NULL;
900 struct usb_host_endpoint *ep;
901 struct async *as;
902 struct usb_ctrlrequest *dr = NULL;
903 unsigned int u, totlen, isofrmlen;
904 int ret, interval = 0, ifnum = -1;
905
906 if (uurb->flags & ~(USBDEVFS_URB_ISO_ASAP|USBDEVFS_URB_SHORT_NOT_OK|
907 URB_NO_FSBR|URB_ZERO_PACKET))
908 return -EINVAL;
909 if (!uurb->buffer)
910 return -EINVAL;
911 if (uurb->signr != 0 && (uurb->signr < SIGRTMIN || uurb->signr > SIGRTMAX))
912 return -EINVAL;
913 if (!(uurb->type == USBDEVFS_URB_TYPE_CONTROL && (uurb->endpoint & ~USB_ENDPOINT_DIR_MASK) == 0)) {
914 if ((ifnum = findintfep(ps->dev, uurb->endpoint)) < 0)
915 return ifnum;
916 if ((ret = checkintf(ps, ifnum)))
917 return ret;
918 }
919 if ((uurb->endpoint & USB_ENDPOINT_DIR_MASK) != 0)
920 ep = ps->dev->ep_in [uurb->endpoint & USB_ENDPOINT_NUMBER_MASK];
921 else
922 ep = ps->dev->ep_out [uurb->endpoint & USB_ENDPOINT_NUMBER_MASK];
923 if (!ep)
924 return -ENOENT;
925 switch(uurb->type) {
926 case USBDEVFS_URB_TYPE_CONTROL:
927 if ((ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK)
928 != USB_ENDPOINT_XFER_CONTROL)
929 return -EINVAL;
930 /* min 8 byte setup packet, max arbitrary */
931 if (uurb->buffer_length < 8 || uurb->buffer_length > PAGE_SIZE)
932 return -EINVAL;
933 if (!(dr = kmalloc(sizeof(struct usb_ctrlrequest), GFP_KERNEL)))
934 return -ENOMEM;
935 if (copy_from_user(dr, uurb->buffer, 8)) {
936 kfree(dr);
937 return -EFAULT;
938 }
939 if (uurb->buffer_length < (le16_to_cpup(&dr->wLength) + 8)) {
940 kfree(dr);
941 return -EINVAL;
942 }
943 if ((ret = check_ctrlrecip(ps, dr->bRequestType, le16_to_cpup(&dr->wIndex)))) {
944 kfree(dr);
945 return ret;
946 }
947 uurb->endpoint = (uurb->endpoint & ~USB_ENDPOINT_DIR_MASK) | (dr->bRequestType & USB_ENDPOINT_DIR_MASK);
948 uurb->number_of_packets = 0;
949 uurb->buffer_length = le16_to_cpup(&dr->wLength);
950 uurb->buffer += 8;
951 if (!access_ok((uurb->endpoint & USB_DIR_IN) ? VERIFY_WRITE : VERIFY_READ, uurb->buffer, uurb->buffer_length)) {
952 kfree(dr);
953 return -EFAULT;
954 }
955 snoop(&ps->dev->dev, "control urb\n");
956 break;
957
958 case USBDEVFS_URB_TYPE_BULK:
959 switch (ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) {
960 case USB_ENDPOINT_XFER_CONTROL:
961 case USB_ENDPOINT_XFER_ISOC:
962 return -EINVAL;
963 /* allow single-shot interrupt transfers, at bogus rates */
964 }
965 uurb->number_of_packets = 0;
966 if (uurb->buffer_length > MAX_USBFS_BUFFER_SIZE)
967 return -EINVAL;
968 if (!access_ok((uurb->endpoint & USB_DIR_IN) ? VERIFY_WRITE : VERIFY_READ, uurb->buffer, uurb->buffer_length))
969 return -EFAULT;
970 snoop(&ps->dev->dev, "bulk urb\n");
971 break;
972
973 case USBDEVFS_URB_TYPE_ISO:
974 /* arbitrary limit */
975 if (uurb->number_of_packets < 1 || uurb->number_of_packets > 128)
976 return -EINVAL;
977 if ((ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK)
978 != USB_ENDPOINT_XFER_ISOC)
979 return -EINVAL;
980 interval = 1 << min (15, ep->desc.bInterval - 1);
981 isofrmlen = sizeof(struct usbdevfs_iso_packet_desc) * uurb->number_of_packets;
982 if (!(isopkt = kmalloc(isofrmlen, GFP_KERNEL)))
983 return -ENOMEM;
984 if (copy_from_user(isopkt, iso_frame_desc, isofrmlen)) {
985 kfree(isopkt);
986 return -EFAULT;
987 }
988 for (totlen = u = 0; u < uurb->number_of_packets; u++) {
989 if (isopkt[u].length > 1023) {
990 kfree(isopkt);
991 return -EINVAL;
992 }
993 totlen += isopkt[u].length;
994 }
995 if (totlen > 32768) {
996 kfree(isopkt);
997 return -EINVAL;
998 }
999 uurb->buffer_length = totlen;
1000 snoop(&ps->dev->dev, "iso urb\n");
1001 break;
1002
1003 case USBDEVFS_URB_TYPE_INTERRUPT:
1004 uurb->number_of_packets = 0;
1005 if ((ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK)
1006 != USB_ENDPOINT_XFER_INT)
1007 return -EINVAL;
1008 if (ps->dev->speed == USB_SPEED_HIGH)
1009 interval = 1 << min (15, ep->desc.bInterval - 1);
1010 else
1011 interval = ep->desc.bInterval;
1012 if (uurb->buffer_length > MAX_USBFS_BUFFER_SIZE)
1013 return -EINVAL;
1014 if (!access_ok((uurb->endpoint & USB_DIR_IN) ? VERIFY_WRITE : VERIFY_READ, uurb->buffer, uurb->buffer_length))
1015 return -EFAULT;
1016 snoop(&ps->dev->dev, "interrupt urb\n");
1017 break;
1018
1019 default:
1020 return -EINVAL;
1021 }
1022 if (!(as = alloc_async(uurb->number_of_packets))) {
1023 kfree(isopkt);
1024 kfree(dr);
1025 return -ENOMEM;
1026 }
1027 if (!(as->urb->transfer_buffer = kmalloc(uurb->buffer_length, GFP_KERNEL))) {
1028 kfree(isopkt);
1029 kfree(dr);
1030 free_async(as);
1031 return -ENOMEM;
1032 }
1033 as->urb->dev = ps->dev;
1034 as->urb->pipe = (uurb->type << 30) | __create_pipe(ps->dev, uurb->endpoint & 0xf) | (uurb->endpoint & USB_DIR_IN);
1035 as->urb->transfer_flags = uurb->flags;
1036 as->urb->transfer_buffer_length = uurb->buffer_length;
1037 as->urb->setup_packet = (unsigned char*)dr;
1038 as->urb->start_frame = uurb->start_frame;
1039 as->urb->number_of_packets = uurb->number_of_packets;
1040 as->urb->interval = interval;
1041 as->urb->context = as;
1042 as->urb->complete = async_completed;
1043 for (totlen = u = 0; u < uurb->number_of_packets; u++) {
1044 as->urb->iso_frame_desc[u].offset = totlen;
1045 as->urb->iso_frame_desc[u].length = isopkt[u].length;
1046 totlen += isopkt[u].length;
1047 }
1048 kfree(isopkt);
1049 as->ps = ps;
1050 as->userurb = arg;
1051 if (uurb->endpoint & USB_DIR_IN)
1052 as->userbuffer = uurb->buffer;
1053 else
1054 as->userbuffer = NULL;
1055 as->signr = uurb->signr;
1056 as->ifnum = ifnum;
1057 as->pid = current->pid;
1058 as->uid = current->uid;
1059 as->euid = current->euid;
1060 if (!(uurb->endpoint & USB_DIR_IN)) {
1061 if (copy_from_user(as->urb->transfer_buffer, uurb->buffer, as->urb->transfer_buffer_length)) {
1062 free_async(as);
1063 return -EFAULT;
1064 }
1065 }
1066 snoop(&as->urb->dev->dev, "submit urb\n");
1067 snoop_urb(as->urb, as->userurb);
1068 async_newpending(as);
1069 if ((ret = usb_submit_urb(as->urb, GFP_KERNEL))) {
1070 dev_printk(KERN_DEBUG, &ps->dev->dev, "usbfs: usb_submit_urb returned %d\n", ret);
1071 async_removepending(as);
1072 free_async(as);
1073 return ret;
1074 }
1075 return 0;
1076 }
1077
1078 static int proc_submiturb(struct dev_state *ps, void __user *arg)
1079 {
1080 struct usbdevfs_urb uurb;
1081
1082 if (copy_from_user(&uurb, arg, sizeof(uurb)))
1083 return -EFAULT;
1084
1085 return proc_do_submiturb(ps, &uurb, (((struct usbdevfs_urb __user *)arg)->iso_frame_desc), arg);
1086 }
1087
1088 static int proc_unlinkurb(struct dev_state *ps, void __user *arg)
1089 {
1090 struct async *as;
1091
1092 as = async_getpending(ps, arg);
1093 if (!as)
1094 return -EINVAL;
1095 usb_kill_urb(as->urb);
1096 return 0;
1097 }
1098
1099 static int processcompl(struct async *as, void __user * __user *arg)
1100 {
1101 struct urb *urb = as->urb;
1102 struct usbdevfs_urb __user *userurb = as->userurb;
1103 void __user *addr = as->userurb;
1104 unsigned int i;
1105
1106 if (as->userbuffer)
1107 if (copy_to_user(as->userbuffer, urb->transfer_buffer, urb->transfer_buffer_length))
1108 return -EFAULT;
1109 if (put_user(urb->status, &userurb->status))
1110 return -EFAULT;
1111 if (put_user(urb->actual_length, &userurb->actual_length))
1112 return -EFAULT;
1113 if (put_user(urb->error_count, &userurb->error_count))
1114 return -EFAULT;
1115
1116 if (usb_pipeisoc(urb->pipe)) {
1117 for (i = 0; i < urb->number_of_packets; i++) {
1118 if (put_user(urb->iso_frame_desc[i].actual_length,
1119 &userurb->iso_frame_desc[i].actual_length))
1120 return -EFAULT;
1121 if (put_user(urb->iso_frame_desc[i].status,
1122 &userurb->iso_frame_desc[i].status))
1123 return -EFAULT;
1124 }
1125 }
1126
1127 free_async(as);
1128
1129 if (put_user(addr, (void __user * __user *)arg))
1130 return -EFAULT;
1131 return 0;
1132 }
1133
1134 static struct async* reap_as(struct dev_state *ps)
1135 {
1136 DECLARE_WAITQUEUE(wait, current);
1137 struct async *as = NULL;
1138 struct usb_device *dev = ps->dev;
1139
1140 add_wait_queue(&ps->wait, &wait);
1141 for (;;) {
1142 __set_current_state(TASK_INTERRUPTIBLE);
1143 if ((as = async_getcompleted(ps)))
1144 break;
1145 if (signal_pending(current))
1146 break;
1147 usb_unlock_device(dev);
1148 schedule();
1149 usb_lock_device(dev);
1150 }
1151 remove_wait_queue(&ps->wait, &wait);
1152 set_current_state(TASK_RUNNING);
1153 return as;
1154 }
1155
1156 static int proc_reapurb(struct dev_state *ps, void __user *arg)
1157 {
1158 struct async *as = reap_as(ps);
1159 if (as)
1160 return processcompl(as, (void __user * __user *)arg);
1161 if (signal_pending(current))
1162 return -EINTR;
1163 return -EIO;
1164 }
1165
1166 static int proc_reapurbnonblock(struct dev_state *ps, void __user *arg)
1167 {
1168 struct async *as;
1169
1170 if (!(as = async_getcompleted(ps)))
1171 return -EAGAIN;
1172 return processcompl(as, (void __user * __user *)arg);
1173 }
1174
1175 #ifdef CONFIG_COMPAT
1176
1177 static int get_urb32(struct usbdevfs_urb *kurb,
1178 struct usbdevfs_urb32 __user *uurb)
1179 {
1180 __u32 uptr;
1181 if (get_user(kurb->type, &uurb->type) ||
1182 __get_user(kurb->endpoint, &uurb->endpoint) ||
1183 __get_user(kurb->status, &uurb->status) ||
1184 __get_user(kurb->flags, &uurb->flags) ||
1185 __get_user(kurb->buffer_length, &uurb->buffer_length) ||
1186 __get_user(kurb->actual_length, &uurb->actual_length) ||
1187 __get_user(kurb->start_frame, &uurb->start_frame) ||
1188 __get_user(kurb->number_of_packets, &uurb->number_of_packets) ||
1189 __get_user(kurb->error_count, &uurb->error_count) ||
1190 __get_user(kurb->signr, &uurb->signr))
1191 return -EFAULT;
1192
1193 if (__get_user(uptr, &uurb->buffer))
1194 return -EFAULT;
1195 kurb->buffer = compat_ptr(uptr);
1196 if (__get_user(uptr, &uurb->buffer))
1197 return -EFAULT;
1198 kurb->usercontext = compat_ptr(uptr);
1199
1200 return 0;
1201 }
1202
1203 static int proc_submiturb_compat(struct dev_state *ps, void __user *arg)
1204 {
1205 struct usbdevfs_urb uurb;
1206
1207 if (get_urb32(&uurb,(struct usbdevfs_urb32 *)arg))
1208 return -EFAULT;
1209
1210 return proc_do_submiturb(ps, &uurb, ((struct usbdevfs_urb32 __user *)arg)->iso_frame_desc, arg);
1211 }
1212
1213 static int processcompl_compat(struct async *as, void __user * __user *arg)
1214 {
1215 struct urb *urb = as->urb;
1216 struct usbdevfs_urb32 __user *userurb = as->userurb;
1217 void __user *addr = as->userurb;
1218 unsigned int i;
1219
1220 if (as->userbuffer)
1221 if (copy_to_user(as->userbuffer, urb->transfer_buffer, urb->transfer_buffer_length))
1222 return -EFAULT;
1223 if (put_user(urb->status, &userurb->status))
1224 return -EFAULT;
1225 if (put_user(urb->actual_length, &userurb->actual_length))
1226 return -EFAULT;
1227 if (put_user(urb->error_count, &userurb->error_count))
1228 return -EFAULT;
1229
1230 if (usb_pipeisoc(urb->pipe)) {
1231 for (i = 0; i < urb->number_of_packets; i++) {
1232 if (put_user(urb->iso_frame_desc[i].actual_length,
1233 &userurb->iso_frame_desc[i].actual_length))
1234 return -EFAULT;
1235 if (put_user(urb->iso_frame_desc[i].status,
1236 &userurb->iso_frame_desc[i].status))
1237 return -EFAULT;
1238 }
1239 }
1240
1241 free_async(as);
1242 if (put_user((u32)(u64)addr, (u32 __user *)arg))
1243 return -EFAULT;
1244 return 0;
1245 }
1246
1247 static int proc_reapurb_compat(struct dev_state *ps, void __user *arg)
1248 {
1249 struct async *as = reap_as(ps);
1250 if (as)
1251 return processcompl_compat(as, (void __user * __user *)arg);
1252 if (signal_pending(current))
1253 return -EINTR;
1254 return -EIO;
1255 }
1256
1257 static int proc_reapurbnonblock_compat(struct dev_state *ps, void __user *arg)
1258 {
1259 struct async *as;
1260
1261 if (!(as = async_getcompleted(ps)))
1262 return -EAGAIN;
1263 return processcompl_compat(as, (void __user * __user *)arg);
1264 }
1265
1266 #endif
1267
1268 static int proc_disconnectsignal(struct dev_state *ps, void __user *arg)
1269 {
1270 struct usbdevfs_disconnectsignal ds;
1271
1272 if (copy_from_user(&ds, arg, sizeof(ds)))
1273 return -EFAULT;
1274 if (ds.signr != 0 && (ds.signr < SIGRTMIN || ds.signr > SIGRTMAX))
1275 return -EINVAL;
1276 ps->discsignr = ds.signr;
1277 ps->disccontext = ds.context;
1278 return 0;
1279 }
1280
1281 static int proc_claiminterface(struct dev_state *ps, void __user *arg)
1282 {
1283 unsigned int ifnum;
1284
1285 if (get_user(ifnum, (unsigned int __user *)arg))
1286 return -EFAULT;
1287 return claimintf(ps, ifnum);
1288 }
1289
1290 static int proc_releaseinterface(struct dev_state *ps, void __user *arg)
1291 {
1292 unsigned int ifnum;
1293 int ret;
1294
1295 if (get_user(ifnum, (unsigned int __user *)arg))
1296 return -EFAULT;
1297 if ((ret = releaseintf(ps, ifnum)) < 0)
1298 return ret;
1299 destroy_async_on_interface (ps, ifnum);
1300 return 0;
1301 }
1302
1303 static int proc_ioctl(struct dev_state *ps, struct usbdevfs_ioctl *ctl)
1304 {
1305 int size;
1306 void *buf = NULL;
1307 int retval = 0;
1308 struct usb_interface *intf = NULL;
1309 struct usb_driver *driver = NULL;
1310
1311 /* alloc buffer */
1312 if ((size = _IOC_SIZE (ctl->ioctl_code)) > 0) {
1313 if ((buf = kmalloc (size, GFP_KERNEL)) == NULL)
1314 return -ENOMEM;
1315 if ((_IOC_DIR(ctl->ioctl_code) & _IOC_WRITE)) {
1316 if (copy_from_user (buf, ctl->data, size)) {
1317 kfree(buf);
1318 return -EFAULT;
1319 }
1320 } else {
1321 memset (buf, 0, size);
1322 }
1323 }
1324
1325 if (!connected(ps->dev)) {
1326 kfree(buf);
1327 return -ENODEV;
1328 }
1329
1330 if (ps->dev->state != USB_STATE_CONFIGURED)
1331 retval = -EHOSTUNREACH;
1332 else if (!(intf = usb_ifnum_to_if (ps->dev, ctl->ifno)))
1333 retval = -EINVAL;
1334 else switch (ctl->ioctl_code) {
1335
1336 /* disconnect kernel driver from interface */
1337 case USBDEVFS_DISCONNECT:
1338
1339 down_write(&usb_bus_type.subsys.rwsem);
1340 if (intf->dev.driver) {
1341 driver = to_usb_driver(intf->dev.driver);
1342 dev_dbg (&intf->dev, "disconnect by usbfs\n");
1343 usb_driver_release_interface(driver, intf);
1344 } else
1345 retval = -ENODATA;
1346 up_write(&usb_bus_type.subsys.rwsem);
1347 break;
1348
1349 /* let kernel drivers try to (re)bind to the interface */
1350 case USBDEVFS_CONNECT:
1351 usb_unlock_device(ps->dev);
1352 bus_rescan_devices(intf->dev.bus);
1353 usb_lock_device(ps->dev);
1354 break;
1355
1356 /* talk directly to the interface's driver */
1357 default:
1358 down_read(&usb_bus_type.subsys.rwsem);
1359 if (intf->dev.driver)
1360 driver = to_usb_driver(intf->dev.driver);
1361 if (driver == NULL || driver->ioctl == NULL) {
1362 retval = -ENOTTY;
1363 } else {
1364 retval = driver->ioctl (intf, ctl->ioctl_code, buf);
1365 if (retval == -ENOIOCTLCMD)
1366 retval = -ENOTTY;
1367 }
1368 up_read(&usb_bus_type.subsys.rwsem);
1369 }
1370
1371 /* cleanup and return */
1372 if (retval >= 0
1373 && (_IOC_DIR (ctl->ioctl_code) & _IOC_READ) != 0
1374 && size > 0
1375 && copy_to_user (ctl->data, buf, size) != 0)
1376 retval = -EFAULT;
1377
1378 kfree(buf);
1379 return retval;
1380 }
1381
1382 static int proc_ioctl_default(struct dev_state *ps, void __user *arg)
1383 {
1384 struct usbdevfs_ioctl ctrl;
1385
1386 if (copy_from_user(&ctrl, arg, sizeof (ctrl)))
1387 return -EFAULT;
1388 return proc_ioctl(ps, &ctrl);
1389 }
1390
1391 #ifdef CONFIG_COMPAT
1392 static int proc_ioctl_compat(struct dev_state *ps, compat_uptr_t arg)
1393 {
1394 struct usbdevfs_ioctl32 __user *uioc;
1395 struct usbdevfs_ioctl ctrl;
1396 u32 udata;
1397
1398 uioc = compat_ptr((long)arg);
1399 if (get_user(ctrl.ifno, &uioc->ifno) ||
1400 get_user(ctrl.ioctl_code, &uioc->ioctl_code) ||
1401 __get_user(udata, &uioc->data))
1402 return -EFAULT;
1403 ctrl.data = compat_ptr(udata);
1404
1405 return proc_ioctl(ps, &ctrl);
1406 }
1407 #endif
1408
1409 /*
1410 * NOTE: All requests here that have interface numbers as parameters
1411 * are assuming that somehow the configuration has been prevented from
1412 * changing. But there's no mechanism to ensure that...
1413 */
1414 static int usbdev_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)
1415 {
1416 struct dev_state *ps = (struct dev_state *)file->private_data;
1417 struct usb_device *dev = ps->dev;
1418 void __user *p = (void __user *)arg;
1419 int ret = -ENOTTY;
1420
1421 if (!(file->f_mode & FMODE_WRITE))
1422 return -EPERM;
1423 usb_lock_device(dev);
1424 if (!connected(dev)) {
1425 usb_unlock_device(dev);
1426 return -ENODEV;
1427 }
1428
1429 switch (cmd) {
1430 case USBDEVFS_CONTROL:
1431 snoop(&dev->dev, "%s: CONTROL\n", __FUNCTION__);
1432 ret = proc_control(ps, p);
1433 if (ret >= 0)
1434 inode->i_mtime = CURRENT_TIME;
1435 break;
1436
1437 case USBDEVFS_BULK:
1438 snoop(&dev->dev, "%s: BULK\n", __FUNCTION__);
1439 ret = proc_bulk(ps, p);
1440 if (ret >= 0)
1441 inode->i_mtime = CURRENT_TIME;
1442 break;
1443
1444 case USBDEVFS_RESETEP:
1445 snoop(&dev->dev, "%s: RESETEP\n", __FUNCTION__);
1446 ret = proc_resetep(ps, p);
1447 if (ret >= 0)
1448 inode->i_mtime = CURRENT_TIME;
1449 break;
1450
1451 case USBDEVFS_RESET:
1452 snoop(&dev->dev, "%s: RESET\n", __FUNCTION__);
1453 ret = proc_resetdevice(ps);
1454 break;
1455
1456 case USBDEVFS_CLEAR_HALT:
1457 snoop(&dev->dev, "%s: CLEAR_HALT\n", __FUNCTION__);
1458 ret = proc_clearhalt(ps, p);
1459 if (ret >= 0)
1460 inode->i_mtime = CURRENT_TIME;
1461 break;
1462
1463 case USBDEVFS_GETDRIVER:
1464 snoop(&dev->dev, "%s: GETDRIVER\n", __FUNCTION__);
1465 ret = proc_getdriver(ps, p);
1466 break;
1467
1468 case USBDEVFS_CONNECTINFO:
1469 snoop(&dev->dev, "%s: CONNECTINFO\n", __FUNCTION__);
1470 ret = proc_connectinfo(ps, p);
1471 break;
1472
1473 case USBDEVFS_SETINTERFACE:
1474 snoop(&dev->dev, "%s: SETINTERFACE\n", __FUNCTION__);
1475 ret = proc_setintf(ps, p);
1476 break;
1477
1478 case USBDEVFS_SETCONFIGURATION:
1479 snoop(&dev->dev, "%s: SETCONFIGURATION\n", __FUNCTION__);
1480 ret = proc_setconfig(ps, p);
1481 break;
1482
1483 case USBDEVFS_SUBMITURB:
1484 snoop(&dev->dev, "%s: SUBMITURB\n", __FUNCTION__);
1485 ret = proc_submiturb(ps, p);
1486 if (ret >= 0)
1487 inode->i_mtime = CURRENT_TIME;
1488 break;
1489
1490 #ifdef CONFIG_COMPAT
1491
1492 case USBDEVFS_SUBMITURB32:
1493 snoop(&dev->dev, "%s: SUBMITURB32\n", __FUNCTION__);
1494 ret = proc_submiturb_compat(ps, p);
1495 if (ret >= 0)
1496 inode->i_mtime = CURRENT_TIME;
1497 break;
1498
1499 case USBDEVFS_REAPURB32:
1500 snoop(&dev->dev, "%s: REAPURB32\n", __FUNCTION__);
1501 ret = proc_reapurb_compat(ps, p);
1502 break;
1503
1504 case USBDEVFS_REAPURBNDELAY32:
1505 snoop(&dev->dev, "%s: REAPURBDELAY32\n", __FUNCTION__);
1506 ret = proc_reapurbnonblock_compat(ps, p);
1507 break;
1508
1509 case USBDEVFS_IOCTL32:
1510 snoop(&dev->dev, "%s: IOCTL\n", __FUNCTION__);
1511 ret = proc_ioctl_compat(ps, (compat_uptr_t)(long)p);
1512 break;
1513 #endif
1514
1515 case USBDEVFS_DISCARDURB:
1516 snoop(&dev->dev, "%s: DISCARDURB\n", __FUNCTION__);
1517 ret = proc_unlinkurb(ps, p);
1518 break;
1519
1520 case USBDEVFS_REAPURB:
1521 snoop(&dev->dev, "%s: REAPURB\n", __FUNCTION__);
1522 ret = proc_reapurb(ps, p);
1523 break;
1524
1525 case USBDEVFS_REAPURBNDELAY:
1526 snoop(&dev->dev, "%s: REAPURBDELAY\n", __FUNCTION__);
1527 ret = proc_reapurbnonblock(ps, p);
1528 break;
1529
1530 case USBDEVFS_DISCSIGNAL:
1531 snoop(&dev->dev, "%s: DISCSIGNAL\n", __FUNCTION__);
1532 ret = proc_disconnectsignal(ps, p);
1533 break;
1534
1535 case USBDEVFS_CLAIMINTERFACE:
1536 snoop(&dev->dev, "%s: CLAIMINTERFACE\n", __FUNCTION__);
1537 ret = proc_claiminterface(ps, p);
1538 break;
1539
1540 case USBDEVFS_RELEASEINTERFACE:
1541 snoop(&dev->dev, "%s: RELEASEINTERFACE\n", __FUNCTION__);
1542 ret = proc_releaseinterface(ps, p);
1543 break;
1544
1545 case USBDEVFS_IOCTL:
1546 snoop(&dev->dev, "%s: IOCTL\n", __FUNCTION__);
1547 ret = proc_ioctl_default(ps, p);
1548 break;
1549 }
1550 usb_unlock_device(dev);
1551 if (ret >= 0)
1552 inode->i_atime = CURRENT_TIME;
1553 return ret;
1554 }
1555
1556 /* No kernel lock - fine */
1557 static unsigned int usbdev_poll(struct file *file, struct poll_table_struct *wait)
1558 {
1559 struct dev_state *ps = (struct dev_state *)file->private_data;
1560 unsigned int mask = 0;
1561
1562 poll_wait(file, &ps->wait, wait);
1563 if (file->f_mode & FMODE_WRITE && !list_empty(&ps->async_completed))
1564 mask |= POLLOUT | POLLWRNORM;
1565 if (!connected(ps->dev))
1566 mask |= POLLERR | POLLHUP;
1567 return mask;
1568 }
1569
1570 struct file_operations usbfs_device_file_operations = {
1571 .llseek = usbdev_lseek,
1572 .read = usbdev_read,
1573 .poll = usbdev_poll,
1574 .ioctl = usbdev_ioctl,
1575 .open = usbdev_open,
1576 .release = usbdev_release,
1577 };
1578
1579 static void usbdev_add(struct usb_device *dev)
1580 {
1581 int minor = ((dev->bus->busnum-1) * 128) + (dev->devnum-1);
1582
1583 dev->class_dev = class_device_create(usb_device_class, NULL,
1584 MKDEV(USB_DEVICE_MAJOR, minor), &dev->dev,
1585 "usbdev%d.%d", dev->bus->busnum, dev->devnum);
1586
1587 dev->class_dev->class_data = dev;
1588 }
1589
1590 static void usbdev_remove(struct usb_device *dev)
1591 {
1592 class_device_unregister(dev->class_dev);
1593 }
1594
1595 static int usbdev_notify(struct notifier_block *self, unsigned long action,
1596 void *dev)
1597 {
1598 switch (action) {
1599 case USB_DEVICE_ADD:
1600 usbdev_add(dev);
1601 break;
1602 case USB_DEVICE_REMOVE:
1603 usbdev_remove(dev);
1604 break;
1605 }
1606 return NOTIFY_OK;
1607 }
1608
1609 static struct notifier_block usbdev_nb = {
1610 .notifier_call = usbdev_notify,
1611 };
1612
1613 static struct cdev usb_device_cdev = {
1614 .kobj = {.name = "usb_device", },
1615 .owner = THIS_MODULE,
1616 };
1617
1618 int __init usbdev_init(void)
1619 {
1620 int retval;
1621
1622 retval = register_chrdev_region(USB_DEVICE_DEV, USB_DEVICE_MAX,
1623 "usb_device");
1624 if (retval) {
1625 err("unable to register minors for usb_device");
1626 goto out;
1627 }
1628 cdev_init(&usb_device_cdev, &usbfs_device_file_operations);
1629 retval = cdev_add(&usb_device_cdev, USB_DEVICE_DEV, USB_DEVICE_MAX);
1630 if (retval) {
1631 err("unable to get usb_device major %d", USB_DEVICE_MAJOR);
1632 goto error_cdev;
1633 }
1634 usb_device_class = class_create(THIS_MODULE, "usb_device");
1635 if (IS_ERR(usb_device_class)) {
1636 err("unable to register usb_device class");
1637 retval = PTR_ERR(usb_device_class);
1638 goto error_class;
1639 }
1640
1641 usb_register_notify(&usbdev_nb);
1642
1643 out:
1644 return retval;
1645
1646 error_class:
1647 usb_device_class = NULL;
1648 cdev_del(&usb_device_cdev);
1649
1650 error_cdev:
1651 unregister_chrdev_region(USB_DEVICE_DEV, USB_DEVICE_MAX);
1652 goto out;
1653 }
1654
1655 void usbdev_cleanup(void)
1656 {
1657 usb_unregister_notify(&usbdev_nb);
1658 class_destroy(usb_device_class);
1659 cdev_del(&usb_device_cdev);
1660 unregister_chrdev_region(USB_DEVICE_DEV, USB_DEVICE_MAX);
1661 }
1662
Verdex Pro support