?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
Merge branch 'odirect'
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / usb / core / devio.c
blob3f8e06279c925e6a53db781902163138092dabeb
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 temp_desc ; /* 18 bytes - fits on the stack */
138
139 memcpy(&temp_desc, &dev->descriptor, sizeof(dev->descriptor));
140 le16_to_cpus(&temp_desc.bcdUSB);
141 le16_to_cpus(&temp_desc.idVendor);
142 le16_to_cpus(&temp_desc.idProduct);
143 le16_to_cpus(&temp_desc.bcdDevice);
144
145 len = sizeof(struct usb_device_descriptor) - pos;
146 if (len > nbytes)
147 len = nbytes;
148 if (copy_to_user(buf, ((char *)&temp_desc) + pos, len)) {
149 ret = -EFAULT;
150 goto err;
151 }
152
153 *ppos += len;
154 buf += len;
155 nbytes -= len;
156 ret += len;
157 }
158
159 pos = sizeof(struct usb_device_descriptor);
160 for (i = 0; nbytes && i < dev->descriptor.bNumConfigurations; i++) {
161 struct usb_config_descriptor *config =
162 (struct usb_config_descriptor *)dev->rawdescriptors[i];
163 unsigned int length = le16_to_cpu(config->wTotalLength);
164
165 if (*ppos < pos + length) {
166
167 /* The descriptor may claim to be longer than it
168 * really is. Here is the actual allocated length. */
169 unsigned alloclen =
170 le16_to_cpu(dev->config[i].desc.wTotalLength);
171
172 len = length - (*ppos - pos);
173 if (len > nbytes)
174 len = nbytes;
175
176 /* Simply don't write (skip over) unallocated parts */
177 if (alloclen > (*ppos - pos)) {
178 alloclen -= (*ppos - pos);
179 if (copy_to_user(buf,
180 dev->rawdescriptors[i] + (*ppos - pos),
181 min(len, alloclen))) {
182 ret = -EFAULT;
183 goto err;
184 }
185 }
186
187 *ppos += len;
188 buf += len;
189 nbytes -= len;
190 ret += len;
191 }
192
193 pos += length;
194 }
195
196 err:
197 usb_unlock_device(dev);
198 return ret;
199 }
200
201 /*
202 * async list handling
203 */
204
205 static struct async *alloc_async(unsigned int numisoframes)
206 {
207 unsigned int assize = sizeof(struct async) + numisoframes * sizeof(struct usb_iso_packet_descriptor);
208 struct async *as = kzalloc(assize, GFP_KERNEL);
209
210 if (!as)
211 return NULL;
212 as->urb = usb_alloc_urb(numisoframes, GFP_KERNEL);
213 if (!as->urb) {
214 kfree(as);
215 return NULL;
216 }
217 return as;
218 }
219
220 static void free_async(struct async *as)
221 {
222 kfree(as->urb->transfer_buffer);
223 kfree(as->urb->setup_packet);
224 usb_free_urb(as->urb);
225 kfree(as);
226 }
227
228 static inline void async_newpending(struct async *as)
229 {
230 struct dev_state *ps = as->ps;
231 unsigned long flags;
232
233 spin_lock_irqsave(&ps->lock, flags);
234 list_add_tail(&as->asynclist, &ps->async_pending);
235 spin_unlock_irqrestore(&ps->lock, flags);
236 }
237
238 static inline void async_removepending(struct async *as)
239 {
240 struct dev_state *ps = as->ps;
241 unsigned long flags;
242
243 spin_lock_irqsave(&ps->lock, flags);
244 list_del_init(&as->asynclist);
245 spin_unlock_irqrestore(&ps->lock, flags);
246 }
247
248 static inline struct async *async_getcompleted(struct dev_state *ps)
249 {
250 unsigned long flags;
251 struct async *as = NULL;
252
253 spin_lock_irqsave(&ps->lock, flags);
254 if (!list_empty(&ps->async_completed)) {
255 as = list_entry(ps->async_completed.next, struct async, asynclist);
256 list_del_init(&as->asynclist);
257 }
258 spin_unlock_irqrestore(&ps->lock, flags);
259 return as;
260 }
261
262 static inline struct async *async_getpending(struct dev_state *ps, void __user *userurb)
263 {
264 unsigned long flags;
265 struct async *as;
266
267 spin_lock_irqsave(&ps->lock, flags);
268 list_for_each_entry(as, &ps->async_pending, asynclist)
269 if (as->userurb == userurb) {
270 list_del_init(&as->asynclist);
271 spin_unlock_irqrestore(&ps->lock, flags);
272 return as;
273 }
274 spin_unlock_irqrestore(&ps->lock, flags);
275 return NULL;
276 }
277
278 static void snoop_urb(struct urb *urb, void __user *userurb)
279 {
280 int j;
281 unsigned char *data = urb->transfer_buffer;
282
283 if (!usbfs_snoop)
284 return;
285
286 if (urb->pipe & USB_DIR_IN)
287 dev_info(&urb->dev->dev, "direction=IN\n");
288 else
289 dev_info(&urb->dev->dev, "direction=OUT\n");
290 dev_info(&urb->dev->dev, "userurb=%p\n", userurb);
291 dev_info(&urb->dev->dev, "transfer_buffer_length=%d\n",
292 urb->transfer_buffer_length);
293 dev_info(&urb->dev->dev, "actual_length=%d\n", urb->actual_length);
294 dev_info(&urb->dev->dev, "data: ");
295 for (j = 0; j < urb->transfer_buffer_length; ++j)
296 printk ("%02x ", data[j]);
297 printk("\n");
298 }
299
300 static void async_completed(struct urb *urb, struct pt_regs *regs)
301 {
302 struct async *as = (struct async *)urb->context;
303 struct dev_state *ps = as->ps;
304 struct siginfo sinfo;
305
306 spin_lock(&ps->lock);
307 list_move_tail(&as->asynclist, &ps->async_completed);
308 spin_unlock(&ps->lock);
309 if (as->signr) {
310 sinfo.si_signo = as->signr;
311 sinfo.si_errno = as->urb->status;
312 sinfo.si_code = SI_ASYNCIO;
313 sinfo.si_addr = as->userurb;
314 kill_proc_info_as_uid(as->signr, &sinfo, as->pid, as->uid,
315 as->euid);
316 }
317 snoop(&urb->dev->dev, "urb complete\n");
318 snoop_urb(urb, as->userurb);
319 wake_up(&ps->wait);
320 }
321
322 static void destroy_async (struct dev_state *ps, struct list_head *list)
323 {
324 struct async *as;
325 unsigned long flags;
326
327 spin_lock_irqsave(&ps->lock, flags);
328 while (!list_empty(list)) {
329 as = list_entry(list->next, struct async, asynclist);
330 list_del_init(&as->asynclist);
331
332 /* drop the spinlock so the completion handler can run */
333 spin_unlock_irqrestore(&ps->lock, flags);
334 usb_kill_urb(as->urb);
335 spin_lock_irqsave(&ps->lock, flags);
336 }
337 spin_unlock_irqrestore(&ps->lock, flags);
338 as = async_getcompleted(ps);
339 while (as) {
340 free_async(as);
341 as = async_getcompleted(ps);
342 }
343 }
344
345 static void destroy_async_on_interface (struct dev_state *ps, unsigned int ifnum)
346 {
347 struct list_head *p, *q, hitlist;
348 unsigned long flags;
349
350 INIT_LIST_HEAD(&hitlist);
351 spin_lock_irqsave(&ps->lock, flags);
352 list_for_each_safe(p, q, &ps->async_pending)
353 if (ifnum == list_entry(p, struct async, asynclist)->ifnum)
354 list_move_tail(p, &hitlist);
355 spin_unlock_irqrestore(&ps->lock, flags);
356 destroy_async(ps, &hitlist);
357 }
358
359 static inline void destroy_all_async(struct dev_state *ps)
360 {
361 destroy_async(ps, &ps->async_pending);
362 }
363
364 /*
365 * interface claims are made only at the request of user level code,
366 * which can also release them (explicitly or by closing files).
367 * they're also undone when devices disconnect.
368 */
369
370 static int driver_probe (struct usb_interface *intf,
371 const struct usb_device_id *id)
372 {
373 return -ENODEV;
374 }
375
376 static void driver_disconnect(struct usb_interface *intf)
377 {
378 struct dev_state *ps = usb_get_intfdata (intf);
379 unsigned int ifnum = intf->altsetting->desc.bInterfaceNumber;
380
381 if (!ps)
382 return;
383
384 /* NOTE: this relies on usbcore having canceled and completed
385 * all pending I/O requests; 2.6 does that.
386 */
387
388 if (likely(ifnum < 8*sizeof(ps->ifclaimed)))
389 clear_bit(ifnum, &ps->ifclaimed);
390 else
391 warn("interface number %u out of range", ifnum);
392
393 usb_set_intfdata (intf, NULL);
394
395 /* force async requests to complete */
396 destroy_async_on_interface(ps, ifnum);
397 }
398
399 struct usb_driver usbfs_driver = {
400 .name = "usbfs",
401 .probe = driver_probe,
402 .disconnect = driver_disconnect,
403 };
404
405 static int claimintf(struct dev_state *ps, unsigned int ifnum)
406 {
407 struct usb_device *dev = ps->dev;
408 struct usb_interface *intf;
409 int err;
410
411 if (ifnum >= 8*sizeof(ps->ifclaimed))
412 return -EINVAL;
413 /* already claimed */
414 if (test_bit(ifnum, &ps->ifclaimed))
415 return 0;
416
417 /* lock against other changes to driver bindings */
418 down_write(&usb_bus_type.subsys.rwsem);
419 intf = usb_ifnum_to_if(dev, ifnum);
420 if (!intf)
421 err = -ENOENT;
422 else
423 err = usb_driver_claim_interface(&usbfs_driver, intf, ps);
424 up_write(&usb_bus_type.subsys.rwsem);
425 if (err == 0)
426 set_bit(ifnum, &ps->ifclaimed);
427 return err;
428 }
429
430 static int releaseintf(struct dev_state *ps, unsigned int ifnum)
431 {
432 struct usb_device *dev;
433 struct usb_interface *intf;
434 int err;
435
436 err = -EINVAL;
437 if (ifnum >= 8*sizeof(ps->ifclaimed))
438 return err;
439 dev = ps->dev;
440 /* lock against other changes to driver bindings */
441 down_write(&usb_bus_type.subsys.rwsem);
442 intf = usb_ifnum_to_if(dev, ifnum);
443 if (!intf)
444 err = -ENOENT;
445 else if (test_and_clear_bit(ifnum, &ps->ifclaimed)) {
446 usb_driver_release_interface(&usbfs_driver, intf);
447 err = 0;
448 }
449 up_write(&usb_bus_type.subsys.rwsem);
450 return err;
451 }
452
453 static int checkintf(struct dev_state *ps, unsigned int ifnum)
454 {
455 if (ps->dev->state != USB_STATE_CONFIGURED)
456 return -EHOSTUNREACH;
457 if (ifnum >= 8*sizeof(ps->ifclaimed))
458 return -EINVAL;
459 if (test_bit(ifnum, &ps->ifclaimed))
460 return 0;
461 /* if not yet claimed, claim it for the driver */
462 dev_warn(&ps->dev->dev, "usbfs: process %d (%s) did not claim interface %u before use\n",
463 current->pid, current->comm, ifnum);
464 return claimintf(ps, ifnum);
465 }
466
467 static int findintfep(struct usb_device *dev, unsigned int ep)
468 {
469 unsigned int i, j, e;
470 struct usb_interface *intf;
471 struct usb_host_interface *alts;
472 struct usb_endpoint_descriptor *endpt;
473
474 if (ep & ~(USB_DIR_IN|0xf))
475 return -EINVAL;
476 if (!dev->actconfig)
477 return -ESRCH;
478 for (i = 0; i < dev->actconfig->desc.bNumInterfaces; i++) {
479 intf = dev->actconfig->interface[i];
480 for (j = 0; j < intf->num_altsetting; j++) {
481 alts = &intf->altsetting[j];
482 for (e = 0; e < alts->desc.bNumEndpoints; e++) {
483 endpt = &alts->endpoint[e].desc;
484 if (endpt->bEndpointAddress == ep)
485 return alts->desc.bInterfaceNumber;
486 }
487 }
488 }
489 return -ENOENT;
490 }
491
492 static int check_ctrlrecip(struct dev_state *ps, unsigned int requesttype, unsigned int index)
493 {
494 int ret = 0;
495
496 if (ps->dev->state != USB_STATE_ADDRESS
497 && ps->dev->state != USB_STATE_CONFIGURED)
498 return -EHOSTUNREACH;
499 if (USB_TYPE_VENDOR == (USB_TYPE_MASK & requesttype))
500 return 0;
501
502 index &= 0xff;
503 switch (requesttype & USB_RECIP_MASK) {
504 case USB_RECIP_ENDPOINT:
505 if ((ret = findintfep(ps->dev, index)) >= 0)
506 ret = checkintf(ps, ret);
507 break;
508
509 case USB_RECIP_INTERFACE:
510 ret = checkintf(ps, index);
511 break;
512 }
513 return ret;
514 }
515
516 static struct usb_device *usbdev_lookup_minor(int minor)
517 {
518 struct device *device;
519 struct usb_device *udev = NULL;
520
521 down(&usb_device_class->sem);
522 list_for_each_entry(device, &usb_device_class->devices, node) {
523 if (device->devt == MKDEV(USB_DEVICE_MAJOR, minor)) {
524 udev = device->platform_data;
525 break;
526 }
527 }
528 up(&usb_device_class->sem);
529
530 return udev;
531 };
532
533 /*
534 * file operations
535 */
536 static int usbdev_open(struct inode *inode, struct file *file)
537 {
538 struct usb_device *dev = NULL;
539 struct dev_state *ps;
540 int ret;
541
542 /*
543 * no locking necessary here, as chrdev_open has the kernel lock
544 * (still acquire the kernel lock for safety)
545 */
546 ret = -ENOMEM;
547 if (!(ps = kmalloc(sizeof(struct dev_state), GFP_KERNEL)))
548 goto out_nolock;
549
550 lock_kernel();
551 ret = -ENOENT;
552 /* check if we are called from a real node or usbfs */
553 if (imajor(inode) == USB_DEVICE_MAJOR)
554 dev = usbdev_lookup_minor(iminor(inode));
555 if (!dev)
556 dev = inode->u.generic_ip;
557 if (!dev) {
558 kfree(ps);
559 goto out;
560 }
561 usb_get_dev(dev);
562 ret = 0;
563 ps->dev = dev;
564 ps->file = file;
565 spin_lock_init(&ps->lock);
566 INIT_LIST_HEAD(&ps->async_pending);
567 INIT_LIST_HEAD(&ps->async_completed);
568 init_waitqueue_head(&ps->wait);
569 ps->discsignr = 0;
570 ps->disc_pid = current->pid;
571 ps->disc_uid = current->uid;
572 ps->disc_euid = current->euid;
573 ps->disccontext = NULL;
574 ps->ifclaimed = 0;
575 wmb();
576 list_add_tail(&ps->list, &dev->filelist);
577 file->private_data = ps;
578 out:
579 unlock_kernel();
580 out_nolock:
581 return ret;
582 }
583
584 static int usbdev_release(struct inode *inode, struct file *file)
585 {
586 struct dev_state *ps = (struct dev_state *)file->private_data;
587 struct usb_device *dev = ps->dev;
588 unsigned int ifnum;
589
590 usb_lock_device(dev);
591 list_del_init(&ps->list);
592 for (ifnum = 0; ps->ifclaimed && ifnum < 8*sizeof(ps->ifclaimed);
593 ifnum++) {
594 if (test_bit(ifnum, &ps->ifclaimed))
595 releaseintf(ps, ifnum);
596 }
597 destroy_all_async(ps);
598 usb_unlock_device(dev);
599 usb_put_dev(dev);
600 ps->dev = NULL;
601 kfree(ps);
602 return 0;
603 }
604
605 static int proc_control(struct dev_state *ps, void __user *arg)
606 {
607 struct usb_device *dev = ps->dev;
608 struct usbdevfs_ctrltransfer ctrl;
609 unsigned int tmo;
610 unsigned char *tbuf;
611 int i, j, ret;
612
613 if (copy_from_user(&ctrl, arg, sizeof(ctrl)))
614 return -EFAULT;
615 if ((ret = check_ctrlrecip(ps, ctrl.bRequestType, ctrl.wIndex)))
616 return ret;
617 if (ctrl.wLength > PAGE_SIZE)
618 return -EINVAL;
619 if (!(tbuf = (unsigned char *)__get_free_page(GFP_KERNEL)))
620 return -ENOMEM;
621 tmo = ctrl.timeout;
622 if (ctrl.bRequestType & 0x80) {
623 if (ctrl.wLength && !access_ok(VERIFY_WRITE, ctrl.data, ctrl.wLength)) {
624 free_page((unsigned long)tbuf);
625 return -EINVAL;
626 }
627 snoop(&dev->dev, "control read: bRequest=%02x "
628 "bRrequestType=%02x wValue=%04x "
629 "wIndex=%04x wLength=%04x\n",
630 ctrl.bRequest, ctrl.bRequestType, ctrl.wValue,
631 ctrl.wIndex, ctrl.wLength);
632
633 usb_unlock_device(dev);
634 i = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), ctrl.bRequest, ctrl.bRequestType,
635 ctrl.wValue, ctrl.wIndex, tbuf, ctrl.wLength, tmo);
636 usb_lock_device(dev);
637 if ((i > 0) && ctrl.wLength) {
638 if (usbfs_snoop) {
639 dev_info(&dev->dev, "control read: data ");
640 for (j = 0; j < i; ++j)
641 printk("%02x ", (unsigned char)(tbuf)[j]);
642 printk("\n");
643 }
644 if (copy_to_user(ctrl.data, tbuf, i)) {
645 free_page((unsigned long)tbuf);
646 return -EFAULT;
647 }
648 }
649 } else {
650 if (ctrl.wLength) {
651 if (copy_from_user(tbuf, ctrl.data, ctrl.wLength)) {
652 free_page((unsigned long)tbuf);
653 return -EFAULT;
654 }
655 }
656 snoop(&dev->dev, "control write: bRequest=%02x "
657 "bRrequestType=%02x wValue=%04x "
658 "wIndex=%04x wLength=%04x\n",
659 ctrl.bRequest, ctrl.bRequestType, ctrl.wValue,
660 ctrl.wIndex, ctrl.wLength);
661 if (usbfs_snoop) {
662 dev_info(&dev->dev, "control write: data: ");
663 for (j = 0; j < ctrl.wLength; ++j)
664 printk("%02x ", (unsigned char)(tbuf)[j]);
665 printk("\n");
666 }
667 usb_unlock_device(dev);
668 i = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), ctrl.bRequest, ctrl.bRequestType,
669 ctrl.wValue, ctrl.wIndex, tbuf, ctrl.wLength, tmo);
670 usb_lock_device(dev);
671 }
672 free_page((unsigned long)tbuf);
673 if (i<0 && i != -EPIPE) {
674 dev_printk(KERN_DEBUG, &dev->dev, "usbfs: USBDEVFS_CONTROL "
675 "failed cmd %s rqt %u rq %u len %u ret %d\n",
676 current->comm, ctrl.bRequestType, ctrl.bRequest,
677 ctrl.wLength, i);
678 }
679 return i;
680 }
681
682 static int proc_bulk(struct dev_state *ps, void __user *arg)
683 {
684 struct usb_device *dev = ps->dev;
685 struct usbdevfs_bulktransfer bulk;
686 unsigned int tmo, len1, pipe;
687 int len2;
688 unsigned char *tbuf;
689 int i, j, ret;
690
691 if (copy_from_user(&bulk, arg, sizeof(bulk)))
692 return -EFAULT;
693 if ((ret = findintfep(ps->dev, bulk.ep)) < 0)
694 return ret;
695 if ((ret = checkintf(ps, ret)))
696 return ret;
697 if (bulk.ep & USB_DIR_IN)
698 pipe = usb_rcvbulkpipe(dev, bulk.ep & 0x7f);
699 else
700 pipe = usb_sndbulkpipe(dev, bulk.ep & 0x7f);
701 if (!usb_maxpacket(dev, pipe, !(bulk.ep & USB_DIR_IN)))
702 return -EINVAL;
703 len1 = bulk.len;
704 if (len1 > MAX_USBFS_BUFFER_SIZE)
705 return -EINVAL;
706 if (!(tbuf = kmalloc(len1, GFP_KERNEL)))
707 return -ENOMEM;
708 tmo = bulk.timeout;
709 if (bulk.ep & 0x80) {
710 if (len1 && !access_ok(VERIFY_WRITE, bulk.data, len1)) {
711 kfree(tbuf);
712 return -EINVAL;
713 }
714 snoop(&dev->dev, "bulk read: len=0x%02x timeout=%04d\n",
715 bulk.len, bulk.timeout);
716 usb_unlock_device(dev);
717 i = usb_bulk_msg(dev, pipe, tbuf, len1, &len2, tmo);
718 usb_lock_device(dev);
719 if (!i && len2) {
720 if (usbfs_snoop) {
721 dev_info(&dev->dev, "bulk read: data ");
722 for (j = 0; j < len2; ++j)
723 printk("%02x ", (unsigned char)(tbuf)[j]);
724 printk("\n");
725 }
726 if (copy_to_user(bulk.data, tbuf, len2)) {
727 kfree(tbuf);
728 return -EFAULT;
729 }
730 }
731 } else {
732 if (len1) {
733 if (copy_from_user(tbuf, bulk.data, len1)) {
734 kfree(tbuf);
735 return -EFAULT;
736 }
737 }
738 snoop(&dev->dev, "bulk write: len=0x%02x timeout=%04d\n",
739 bulk.len, bulk.timeout);
740 if (usbfs_snoop) {
741 dev_info(&dev->dev, "bulk write: data: ");
742 for (j = 0; j < len1; ++j)
743 printk("%02x ", (unsigned char)(tbuf)[j]);
744 printk("\n");
745 }
746 usb_unlock_device(dev);
747 i = usb_bulk_msg(dev, pipe, tbuf, len1, &len2, tmo);
748 usb_lock_device(dev);
749 }
750 kfree(tbuf);
751 if (i < 0)
752 return i;
753 return len2;
754 }
755
756 static int proc_resetep(struct dev_state *ps, void __user *arg)
757 {
758 unsigned int ep;
759 int ret;
760
761 if (get_user(ep, (unsigned int __user *)arg))
762 return -EFAULT;
763 if ((ret = findintfep(ps->dev, ep)) < 0)
764 return ret;
765 if ((ret = checkintf(ps, ret)))
766 return ret;
767 usb_settoggle(ps->dev, ep & 0xf, !(ep & USB_DIR_IN), 0);
768 return 0;
769 }
770
771 static int proc_clearhalt(struct dev_state *ps, void __user *arg)
772 {
773 unsigned int ep;
774 int pipe;
775 int ret;
776
777 if (get_user(ep, (unsigned int __user *)arg))
778 return -EFAULT;
779 if ((ret = findintfep(ps->dev, ep)) < 0)
780 return ret;
781 if ((ret = checkintf(ps, ret)))
782 return ret;
783 if (ep & USB_DIR_IN)
784 pipe = usb_rcvbulkpipe(ps->dev, ep & 0x7f);
785 else
786 pipe = usb_sndbulkpipe(ps->dev, ep & 0x7f);
787
788 return usb_clear_halt(ps->dev, pipe);
789 }
790
791
792 static int proc_getdriver(struct dev_state *ps, void __user *arg)
793 {
794 struct usbdevfs_getdriver gd;
795 struct usb_interface *intf;
796 int ret;
797
798 if (copy_from_user(&gd, arg, sizeof(gd)))
799 return -EFAULT;
800 down_read(&usb_bus_type.subsys.rwsem);
801 intf = usb_ifnum_to_if(ps->dev, gd.interface);
802 if (!intf || !intf->dev.driver)
803 ret = -ENODATA;
804 else {
805 strncpy(gd.driver, intf->dev.driver->name,
806 sizeof(gd.driver));
807 ret = (copy_to_user(arg, &gd, sizeof(gd)) ? -EFAULT : 0);
808 }
809 up_read(&usb_bus_type.subsys.rwsem);
810 return ret;
811 }
812
813 static int proc_connectinfo(struct dev_state *ps, void __user *arg)
814 {
815 struct usbdevfs_connectinfo ci;
816
817 ci.devnum = ps->dev->devnum;
818 ci.slow = ps->dev->speed == USB_SPEED_LOW;
819 if (copy_to_user(arg, &ci, sizeof(ci)))
820 return -EFAULT;
821 return 0;
822 }
823
824 static int proc_resetdevice(struct dev_state *ps)
825 {
826 return usb_reset_composite_device(ps->dev, NULL);
827 }
828
829 static int proc_setintf(struct dev_state *ps, void __user *arg)
830 {
831 struct usbdevfs_setinterface setintf;
832 int ret;
833
834 if (copy_from_user(&setintf, arg, sizeof(setintf)))
835 return -EFAULT;
836 if ((ret = checkintf(ps, setintf.interface)))
837 return ret;
838 return usb_set_interface(ps->dev, setintf.interface,
839 setintf.altsetting);
840 }
841
842 static int proc_setconfig(struct dev_state *ps, void __user *arg)
843 {
844 unsigned int u;
845 int status = 0;
846 struct usb_host_config *actconfig;
847
848 if (get_user(u, (unsigned int __user *)arg))
849 return -EFAULT;
850
851 actconfig = ps->dev->actconfig;
852
853 /* Don't touch the device if any interfaces are claimed.
854 * It could interfere with other drivers' operations, and if
855 * an interface is claimed by usbfs it could easily deadlock.
856 */
857 if (actconfig) {
858 int i;
859
860 for (i = 0; i < actconfig->desc.bNumInterfaces; ++i) {
861 if (usb_interface_claimed(actconfig->interface[i])) {
862 dev_warn (&ps->dev->dev,
863 "usbfs: interface %d claimed by %s "
864 "while '%s' sets config #%d\n",
865 actconfig->interface[i]
866 ->cur_altsetting
867 ->desc.bInterfaceNumber,
868 actconfig->interface[i]
869 ->dev.driver->name,
870 current->comm, u);
871 status = -EBUSY;
872 break;
873 }
874 }
875 }
876
877 /* SET_CONFIGURATION is often abused as a "cheap" driver reset,
878 * so avoid usb_set_configuration()'s kick to sysfs
879 */
880 if (status == 0) {
881 if (actconfig && actconfig->desc.bConfigurationValue == u)
882 status = usb_reset_configuration(ps->dev);
883 else
884 status = usb_set_configuration(ps->dev, u);
885 }
886
887 return status;
888 }
889
890 static int proc_do_submiturb(struct dev_state *ps, struct usbdevfs_urb *uurb,
891 struct usbdevfs_iso_packet_desc __user *iso_frame_desc,
892 void __user *arg)
893 {
894 struct usbdevfs_iso_packet_desc *isopkt = NULL;
895 struct usb_host_endpoint *ep;
896 struct async *as;
897 struct usb_ctrlrequest *dr = NULL;
898 unsigned int u, totlen, isofrmlen;
899 int ret, interval = 0, ifnum = -1;
900
901 if (uurb->flags & ~(USBDEVFS_URB_ISO_ASAP|USBDEVFS_URB_SHORT_NOT_OK|
902 URB_NO_FSBR|URB_ZERO_PACKET))
903 return -EINVAL;
904 if (!uurb->buffer)
905 return -EINVAL;
906 if (uurb->signr != 0 && (uurb->signr < SIGRTMIN || uurb->signr > SIGRTMAX))
907 return -EINVAL;
908 if (!(uurb->type == USBDEVFS_URB_TYPE_CONTROL && (uurb->endpoint & ~USB_ENDPOINT_DIR_MASK) == 0)) {
909 if ((ifnum = findintfep(ps->dev, uurb->endpoint)) < 0)
910 return ifnum;
911 if ((ret = checkintf(ps, ifnum)))
912 return ret;
913 }
914 if ((uurb->endpoint & USB_ENDPOINT_DIR_MASK) != 0)
915 ep = ps->dev->ep_in [uurb->endpoint & USB_ENDPOINT_NUMBER_MASK];
916 else
917 ep = ps->dev->ep_out [uurb->endpoint & USB_ENDPOINT_NUMBER_MASK];
918 if (!ep)
919 return -ENOENT;
920 switch(uurb->type) {
921 case USBDEVFS_URB_TYPE_CONTROL:
922 if ((ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK)
923 != USB_ENDPOINT_XFER_CONTROL)
924 return -EINVAL;
925 /* min 8 byte setup packet, max 8 byte setup plus an arbitrary data stage */
926 if (uurb->buffer_length < 8 || uurb->buffer_length > (8 + MAX_USBFS_BUFFER_SIZE))
927 return -EINVAL;
928 if (!(dr = kmalloc(sizeof(struct usb_ctrlrequest), GFP_KERNEL)))
929 return -ENOMEM;
930 if (copy_from_user(dr, uurb->buffer, 8)) {
931 kfree(dr);
932 return -EFAULT;
933 }
934 if (uurb->buffer_length < (le16_to_cpup(&dr->wLength) + 8)) {
935 kfree(dr);
936 return -EINVAL;
937 }
938 if ((ret = check_ctrlrecip(ps, dr->bRequestType, le16_to_cpup(&dr->wIndex)))) {
939 kfree(dr);
940 return ret;
941 }
942 uurb->endpoint = (uurb->endpoint & ~USB_ENDPOINT_DIR_MASK) | (dr->bRequestType & USB_ENDPOINT_DIR_MASK);
943 uurb->number_of_packets = 0;
944 uurb->buffer_length = le16_to_cpup(&dr->wLength);
945 uurb->buffer += 8;
946 if (!access_ok((uurb->endpoint & USB_DIR_IN) ? VERIFY_WRITE : VERIFY_READ, uurb->buffer, uurb->buffer_length)) {
947 kfree(dr);
948 return -EFAULT;
949 }
950 snoop(&ps->dev->dev, "control urb\n");
951 break;
952
953 case USBDEVFS_URB_TYPE_BULK:
954 switch (ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) {
955 case USB_ENDPOINT_XFER_CONTROL:
956 case USB_ENDPOINT_XFER_ISOC:
957 return -EINVAL;
958 /* allow single-shot interrupt transfers, at bogus rates */
959 }
960 uurb->number_of_packets = 0;
961 if (uurb->buffer_length > MAX_USBFS_BUFFER_SIZE)
962 return -EINVAL;
963 if (!access_ok((uurb->endpoint & USB_DIR_IN) ? VERIFY_WRITE : VERIFY_READ, uurb->buffer, uurb->buffer_length))
964 return -EFAULT;
965 snoop(&ps->dev->dev, "bulk urb\n");
966 break;
967
968 case USBDEVFS_URB_TYPE_ISO:
969 /* arbitrary limit */
970 if (uurb->number_of_packets < 1 || uurb->number_of_packets > 128)
971 return -EINVAL;
972 if ((ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK)
973 != USB_ENDPOINT_XFER_ISOC)
974 return -EINVAL;
975 interval = 1 << min (15, ep->desc.bInterval - 1);
976 isofrmlen = sizeof(struct usbdevfs_iso_packet_desc) * uurb->number_of_packets;
977 if (!(isopkt = kmalloc(isofrmlen, GFP_KERNEL)))
978 return -ENOMEM;
979 if (copy_from_user(isopkt, iso_frame_desc, isofrmlen)) {
980 kfree(isopkt);
981 return -EFAULT;
982 }
983 for (totlen = u = 0; u < uurb->number_of_packets; u++) {
984 /* arbitrary limit, sufficient for USB 2.0 high-bandwidth iso */
985 if (isopkt[u].length > 8192) {
986 kfree(isopkt);
987 return -EINVAL;
988 }
989 totlen += isopkt[u].length;
990 }
991 if (totlen > 32768) {
992 kfree(isopkt);
993 return -EINVAL;
994 }
995 uurb->buffer_length = totlen;
996 snoop(&ps->dev->dev, "iso urb\n");
997 break;
998
999 case USBDEVFS_URB_TYPE_INTERRUPT:
1000 uurb->number_of_packets = 0;
1001 if ((ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK)
1002 != USB_ENDPOINT_XFER_INT)
1003 return -EINVAL;
1004 if (ps->dev->speed == USB_SPEED_HIGH)
1005 interval = 1 << min (15, ep->desc.bInterval - 1);
1006 else
1007 interval = ep->desc.bInterval;
1008 if (uurb->buffer_length > MAX_USBFS_BUFFER_SIZE)
1009 return -EINVAL;
1010 if (!access_ok((uurb->endpoint & USB_DIR_IN) ? VERIFY_WRITE : VERIFY_READ, uurb->buffer, uurb->buffer_length))
1011 return -EFAULT;
1012 snoop(&ps->dev->dev, "interrupt urb\n");
1013 break;
1014
1015 default:
1016 return -EINVAL;
1017 }
1018 if (!(as = alloc_async(uurb->number_of_packets))) {
1019 kfree(isopkt);
1020 kfree(dr);
1021 return -ENOMEM;
1022 }
1023 if (!(as->urb->transfer_buffer = kmalloc(uurb->buffer_length, GFP_KERNEL))) {
1024 kfree(isopkt);
1025 kfree(dr);
1026 free_async(as);
1027 return -ENOMEM;
1028 }
1029 as->urb->dev = ps->dev;
1030 as->urb->pipe = (uurb->type << 30) | __create_pipe(ps->dev, uurb->endpoint & 0xf) | (uurb->endpoint & USB_DIR_IN);
1031 as->urb->transfer_flags = uurb->flags;
1032 as->urb->transfer_buffer_length = uurb->buffer_length;
1033 as->urb->setup_packet = (unsigned char*)dr;
1034 as->urb->start_frame = uurb->start_frame;
1035 as->urb->number_of_packets = uurb->number_of_packets;
1036 as->urb->interval = interval;
1037 as->urb->context = as;
1038 as->urb->complete = async_completed;
1039 for (totlen = u = 0; u < uurb->number_of_packets; u++) {
1040 as->urb->iso_frame_desc[u].offset = totlen;
1041 as->urb->iso_frame_desc[u].length = isopkt[u].length;
1042 totlen += isopkt[u].length;
1043 }
1044 kfree(isopkt);
1045 as->ps = ps;
1046 as->userurb = arg;
1047 if (uurb->endpoint & USB_DIR_IN)
1048 as->userbuffer = uurb->buffer;
1049 else
1050 as->userbuffer = NULL;
1051 as->signr = uurb->signr;
1052 as->ifnum = ifnum;
1053 as->pid = current->pid;
1054 as->uid = current->uid;
1055 as->euid = current->euid;
1056 if (!(uurb->endpoint & USB_DIR_IN)) {
1057 if (copy_from_user(as->urb->transfer_buffer, uurb->buffer, as->urb->transfer_buffer_length)) {
1058 free_async(as);
1059 return -EFAULT;
1060 }
1061 }
1062 snoop(&as->urb->dev->dev, "submit urb\n");
1063 snoop_urb(as->urb, as->userurb);
1064 async_newpending(as);
1065 if ((ret = usb_submit_urb(as->urb, GFP_KERNEL))) {
1066 dev_printk(KERN_DEBUG, &ps->dev->dev, "usbfs: usb_submit_urb returned %d\n", ret);
1067 async_removepending(as);
1068 free_async(as);
1069 return ret;
1070 }
1071 return 0;
1072 }
1073
1074 static int proc_submiturb(struct dev_state *ps, void __user *arg)
1075 {
1076 struct usbdevfs_urb uurb;
1077
1078 if (copy_from_user(&uurb, arg, sizeof(uurb)))
1079 return -EFAULT;
1080
1081 return proc_do_submiturb(ps, &uurb,
1082 (struct usbdevfs_iso_packet_desc __user *)uurb.iso_frame_desc,
1083 arg);
1084 }
1085
1086 static int proc_unlinkurb(struct dev_state *ps, void __user *arg)
1087 {
1088 struct async *as;
1089
1090 as = async_getpending(ps, arg);
1091 if (!as)
1092 return -EINVAL;
1093 usb_kill_urb(as->urb);
1094 return 0;
1095 }
1096
1097 static int processcompl(struct async *as, void __user * __user *arg)
1098 {
1099 struct urb *urb = as->urb;
1100 struct usbdevfs_urb __user *userurb = as->userurb;
1101 void __user *addr = as->userurb;
1102 unsigned int i;
1103
1104 if (as->userbuffer)
1105 if (copy_to_user(as->userbuffer, urb->transfer_buffer, urb->transfer_buffer_length))
1106 return -EFAULT;
1107 if (put_user(urb->status, &userurb->status))
1108 return -EFAULT;
1109 if (put_user(urb->actual_length, &userurb->actual_length))
1110 return -EFAULT;
1111 if (put_user(urb->error_count, &userurb->error_count))
1112 return -EFAULT;
1113
1114 if (usb_pipeisoc(urb->pipe)) {
1115 for (i = 0; i < urb->number_of_packets; i++) {
1116 if (put_user(urb->iso_frame_desc[i].actual_length,
1117 &userurb->iso_frame_desc[i].actual_length))
1118 return -EFAULT;
1119 if (put_user(urb->iso_frame_desc[i].status,
1120 &userurb->iso_frame_desc[i].status))
1121 return -EFAULT;
1122 }
1123 }
1124
1125 free_async(as);
1126
1127 if (put_user(addr, (void __user * __user *)arg))
1128 return -EFAULT;
1129 return 0;
1130 }
1131
1132 static struct async* reap_as(struct dev_state *ps)
1133 {
1134 DECLARE_WAITQUEUE(wait, current);
1135 struct async *as = NULL;
1136 struct usb_device *dev = ps->dev;
1137
1138 add_wait_queue(&ps->wait, &wait);
1139 for (;;) {
1140 __set_current_state(TASK_INTERRUPTIBLE);
1141 if ((as = async_getcompleted(ps)))
1142 break;
1143 if (signal_pending(current))
1144 break;
1145 usb_unlock_device(dev);
1146 schedule();
1147 usb_lock_device(dev);
1148 }
1149 remove_wait_queue(&ps->wait, &wait);
1150 set_current_state(TASK_RUNNING);
1151 return as;
1152 }
1153
1154 static int proc_reapurb(struct dev_state *ps, void __user *arg)
1155 {
1156 struct async *as = reap_as(ps);
1157 if (as)
1158 return processcompl(as, (void __user * __user *)arg);
1159 if (signal_pending(current))
1160 return -EINTR;
1161 return -EIO;
1162 }
1163
1164 static int proc_reapurbnonblock(struct dev_state *ps, void __user *arg)
1165 {
1166 struct async *as;
1167
1168 if (!(as = async_getcompleted(ps)))
1169 return -EAGAIN;
1170 return processcompl(as, (void __user * __user *)arg);
1171 }
1172
1173 #ifdef CONFIG_COMPAT
1174
1175 static int get_urb32(struct usbdevfs_urb *kurb,
1176 struct usbdevfs_urb32 __user *uurb)
1177 {
1178 __u32 uptr;
1179 if (get_user(kurb->type, &uurb->type) ||
1180 __get_user(kurb->endpoint, &uurb->endpoint) ||
1181 __get_user(kurb->status, &uurb->status) ||
1182 __get_user(kurb->flags, &uurb->flags) ||
1183 __get_user(kurb->buffer_length, &uurb->buffer_length) ||
1184 __get_user(kurb->actual_length, &uurb->actual_length) ||
1185 __get_user(kurb->start_frame, &uurb->start_frame) ||
1186 __get_user(kurb->number_of_packets, &uurb->number_of_packets) ||
1187 __get_user(kurb->error_count, &uurb->error_count) ||
1188 __get_user(kurb->signr, &uurb->signr))
1189 return -EFAULT;
1190
1191 if (__get_user(uptr, &uurb->buffer))
1192 return -EFAULT;
1193 kurb->buffer = compat_ptr(uptr);
1194 if (__get_user(uptr, &uurb->buffer))
1195 return -EFAULT;
1196 kurb->usercontext = compat_ptr(uptr);
1197
1198 return 0;
1199 }
1200
1201 static int proc_submiturb_compat(struct dev_state *ps, void __user *arg)
1202 {
1203 struct usbdevfs_urb uurb;
1204
1205 if (get_urb32(&uurb,(struct usbdevfs_urb32 *)arg))
1206 return -EFAULT;
1207
1208 return proc_do_submiturb(ps, &uurb,
1209 (struct usbdevfs_iso_packet_desc __user *)uurb.iso_frame_desc,
1210 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->usbfs_dev = device_create(usb_device_class, &dev->dev,
1584 MKDEV(USB_DEVICE_MAJOR, minor),
1585 "usbdev%d.%d", dev->bus->busnum, dev->devnum);
1586
1587 dev->usbfs_dev->platform_data = dev;
1588 }
1589
1590 static void usbdev_remove(struct usb_device *dev)
1591 {
1592 device_unregister(dev->usbfs_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
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree