projects / GitHub / mt8127 / android_kernel_alcatel_ttab.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
[PATCH] usbfs: usbfs_dir_inode_operations cleanup
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / usb / core / devio.c
CommitLineData
1da177e4
LT		 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
46113830
HW		 33 * 30.09.2005 0.3 Fix user-triggerable oops in async URB delivery
34 * (CAN-2005-3055)
1da177e4
LT		 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>
fbf82fd2 48#include <linux/cdev.h>
a7b986b3 49#include <linux/notifier.h>
1da177e4
LT		 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
fbf82fd2
KS		 57#define USB_MAXBUS 64
58#define USB_DEVICE_MAX USB_MAXBUS * 128
59static struct class *usb_device_class;
60
1da177e4
LT		 61struct async {
62 struct list_head asynclist;
63 struct dev_state *ps;
46113830
HW		 64 pid_t pid;
65 uid_t uid, euid;
1da177e4
LT		 66 unsigned int signr;
67 unsigned int ifnum;
68 void __user *userbuffer;
69 void __user *userurb;
70 struct urb *urb;
71};
72
73static int usbfs_snoop = 0;
74module_param (usbfs_snoop, bool, S_IRUGO | S_IWUSR);
75MODULE_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
fad21bdf
AS		 83#define USB_DEVICE_DEV MKDEV(USB_DEVICE_MAJOR, 0)
84
1da177e4
LT		 85
86#define MAX_USBFS_BUFFER_SIZE 16384
87
88static inline int connected (struct usb_device *dev)
89{
90 return dev->state != USB_STATE_NOTATTACHED;
91}
92
93static 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
117static 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
201err:
202 usb_unlock_device(dev);
203 return ret;
204}
205
206/*
207 * async list handling
208 */
209
210static struct async *alloc_async(unsigned int numisoframes)
211{
212 unsigned int assize = sizeof(struct async) + numisoframes * sizeof(struct usb_iso_packet_descriptor);
0a1ef3b5
AS		 213 struct async *as = kzalloc(assize, GFP_KERNEL);
214
1da177e4
LT		 215 if (!as)
216 return NULL;
1da177e4
LT		 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
225static void free_async(struct async *as)
226{
6fd19f4b
JJ		 227 kfree(as->urb->transfer_buffer);
228 kfree(as->urb->setup_packet);
1da177e4 229 usb_free_urb(as->urb);
6fd19f4b 230 kfree(as);
1da177e4
LT		 231}
232
233static 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
243static 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
253static 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
267static 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
e639dd3f
GKH		 283static 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
1da177e4
LT		 305static 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;
46113830
HW		 319 kill_proc_info_as_uid(as->signr, &sinfo, as->pid, as->uid,
320 as->euid);
1da177e4 321 }
e639dd3f
GKH		 322 snoop(&urb->dev->dev, "urb complete\n");
323 snoop_urb(urb, as->userurb);
324 wake_up(&ps->wait);
1da177e4
LT		 325}
326
327static 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
350static 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
364static 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
375static int driver_probe (struct usb_interface *intf,
376 const struct usb_device_id *id)
377{
378 return -ENODEV;
379}
380
381static 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
404struct usb_driver usbfs_driver = {
405 .owner = THIS_MODULE,
406 .name = "usbfs",
407 .probe = driver_probe,
408 .disconnect = driver_disconnect,
409};
410
411static int claimintf(struct dev_state *ps, unsigned int ifnum)
412{
413 struct usb_device *dev = ps->dev;
414 struct usb_interface *intf;
415 int err;
416
417 if (ifnum >= 8*sizeof(ps->ifclaimed))
418 return -EINVAL;
419 /* already claimed */
420 if (test_bit(ifnum, &ps->ifclaimed))
421 return 0;
422
423 /* lock against other changes to driver bindings */
424 down_write(&usb_bus_type.subsys.rwsem);
425 intf = usb_ifnum_to_if(dev, ifnum);
426 if (!intf)
427 err = -ENOENT;
428 else
429 err = usb_driver_claim_interface(&usbfs_driver, intf, ps);
430 up_write(&usb_bus_type.subsys.rwsem);
431 if (err == 0)
432 set_bit(ifnum, &ps->ifclaimed);
433 return err;
434}
435
436static int releaseintf(struct dev_state *ps, unsigned int ifnum)
437{
438 struct usb_device *dev;
439 struct usb_interface *intf;
440 int err;
441
442 err = -EINVAL;
443 if (ifnum >= 8*sizeof(ps->ifclaimed))
444 return err;
445 dev = ps->dev;
446 /* lock against other changes to driver bindings */
447 down_write(&usb_bus_type.subsys.rwsem);
448 intf = usb_ifnum_to_if(dev, ifnum);
449 if (!intf)
450 err = -ENOENT;
451 else if (test_and_clear_bit(ifnum, &ps->ifclaimed)) {
452 usb_driver_release_interface(&usbfs_driver, intf);
453 err = 0;
454 }
455 up_write(&usb_bus_type.subsys.rwsem);
456 return err;
457}
458
459static int checkintf(struct dev_state *ps, unsigned int ifnum)
460{
461 if (ps->dev->state != USB_STATE_CONFIGURED)
462 return -EHOSTUNREACH;
463 if (ifnum >= 8*sizeof(ps->ifclaimed))
464 return -EINVAL;
465 if (test_bit(ifnum, &ps->ifclaimed))
466 return 0;
467 /* if not yet claimed, claim it for the driver */
468 dev_warn(&ps->dev->dev, "usbfs: process %d (%s) did not claim interface %u before use\n",
469 current->pid, current->comm, ifnum);
470 return claimintf(ps, ifnum);
471}
472
473static int findintfep(struct usb_device *dev, unsigned int ep)
474{
475 unsigned int i, j, e;
476 struct usb_interface *intf;
477 struct usb_host_interface *alts;
478 struct usb_endpoint_descriptor *endpt;
479
480 if (ep & ~(USB_DIR_IN|0xf))
481 return -EINVAL;
482 if (!dev->actconfig)
483 return -ESRCH;
484 for (i = 0; i < dev->actconfig->desc.bNumInterfaces; i++) {
485 intf = dev->actconfig->interface[i];
486 for (j = 0; j < intf->num_altsetting; j++) {
487 alts = &intf->altsetting[j];
488 for (e = 0; e < alts->desc.bNumEndpoints; e++) {
489 endpt = &alts->endpoint[e].desc;
490 if (endpt->bEndpointAddress == ep)
491 return alts->desc.bInterfaceNumber;
492 }
493 }
494 }
495 return -ENOENT;
496}
497
498static int check_ctrlrecip(struct dev_state *ps, unsigned int requesttype, unsigned int index)
499{
500 int ret = 0;
501
502 if (ps->dev->state != USB_STATE_CONFIGURED)
503 return -EHOSTUNREACH;
504 if (USB_TYPE_VENDOR == (USB_TYPE_MASK & requesttype))
505 return 0;
506
507 index &= 0xff;
508 switch (requesttype & USB_RECIP_MASK) {
509 case USB_RECIP_ENDPOINT:
510 if ((ret = findintfep(ps->dev, index)) >= 0)
511 ret = checkintf(ps, ret);
512 break;
513
514 case USB_RECIP_INTERFACE:
515 ret = checkintf(ps, index);
516 break;
517 }
518 return ret;
519}
520
4592bf5a
GKH		 521static struct usb_device *usbdev_lookup_minor(int minor)
522{
523 struct class_device *class_dev;
524 struct usb_device *dev = NULL;
525
526 down(&usb_device_class->sem);
527 list_for_each_entry(class_dev, &usb_device_class->children, node) {
528 if (class_dev->devt == MKDEV(USB_DEVICE_MAJOR, minor)) {
529 dev = class_dev->class_data;
530 break;
531 }
532 }
533 up(&usb_device_class->sem);
534
535 return dev;
536};
537
1da177e4
LT		 538/*
539 * file operations
540 */
541static int usbdev_open(struct inode *inode, struct file *file)
542{
fbf82fd2 543 struct usb_device *dev = NULL;
1da177e4
LT		 544 struct dev_state *ps;
545 int ret;
546
547 /*
548 * no locking necessary here, as chrdev_open has the kernel lock
549 * (still acquire the kernel lock for safety)
550 */
551 ret = -ENOMEM;
552 if (!(ps = kmalloc(sizeof(struct dev_state), GFP_KERNEL)))
553 goto out_nolock;
554
555 lock_kernel();
556 ret = -ENOENT;
fbf82fd2
KS		 557 /* check if we are called from a real node or usbfs */
558 if (imajor(inode) == USB_DEVICE_MAJOR)
559 dev = usbdev_lookup_minor(iminor(inode));
560 if (!dev)
561 dev = inode->u.generic_ip;
1da177e4
LT		 562 if (!dev) {
563 kfree(ps);
564 goto out;
565 }
fbf82fd2 566 usb_get_dev(dev);
1da177e4
LT		 567 ret = 0;
568 ps->dev = dev;
569 ps->file = file;
570 spin_lock_init(&ps->lock);
571 INIT_LIST_HEAD(&ps->async_pending);
572 INIT_LIST_HEAD(&ps->async_completed);
573 init_waitqueue_head(&ps->wait);
574 ps->discsignr = 0;
d7dd8a72
LT		 575 ps->disc_pid = current->pid;
576 ps->disc_uid = current->uid;
577 ps->disc_euid = current->euid;
1da177e4
LT		 578 ps->disccontext = NULL;
579 ps->ifclaimed = 0;
580 wmb();
581 list_add_tail(&ps->list, &dev->filelist);
582 file->private_data = ps;
583 out:
584 unlock_kernel();
585 out_nolock:
586 return ret;
587}
588
589static int usbdev_release(struct inode *inode, struct file *file)
590{
591 struct dev_state *ps = (struct dev_state *)file->private_data;
592 struct usb_device *dev = ps->dev;
593 unsigned int ifnum;
594
595 usb_lock_device(dev);
596 list_del_init(&ps->list);
597 for (ifnum = 0; ps->ifclaimed && ifnum < 8*sizeof(ps->ifclaimed);
598 ifnum++) {
599 if (test_bit(ifnum, &ps->ifclaimed))
600 releaseintf(ps, ifnum);
601 }
602 destroy_all_async(ps);
603 usb_unlock_device(dev);
604 usb_put_dev(dev);
605 ps->dev = NULL;
606 kfree(ps);
607 return 0;
608}
609
610static int proc_control(struct dev_state *ps, void __user *arg)
611{
612 struct usb_device *dev = ps->dev;
613 struct usbdevfs_ctrltransfer ctrl;
614 unsigned int tmo;
615 unsigned char *tbuf;
616 int i, j, ret;
617
618 if (copy_from_user(&ctrl, arg, sizeof(ctrl)))
619 return -EFAULT;
620 if ((ret = check_ctrlrecip(ps, ctrl.bRequestType, ctrl.wIndex)))
621 return ret;
622 if (ctrl.wLength > PAGE_SIZE)
623 return -EINVAL;
624 if (!(tbuf = (unsigned char *)__get_free_page(GFP_KERNEL)))
625 return -ENOMEM;
626 tmo = ctrl.timeout;
627 if (ctrl.bRequestType & 0x80) {
628 if (ctrl.wLength && !access_ok(VERIFY_WRITE, ctrl.data, ctrl.wLength)) {
629 free_page((unsigned long)tbuf);
630 return -EINVAL;
631 }
fe0410c7
AS		 632 snoop(&dev->dev, "control read: bRequest=%02x "
633 "bRrequestType=%02x wValue=%04x "
634 "wIndex=%04x wLength=%04x\n",
635 ctrl.bRequest, ctrl.bRequestType, ctrl.wValue,
636 ctrl.wIndex, ctrl.wLength);
1da177e4
LT		 637
638 usb_unlock_device(dev);
639 i = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), ctrl.bRequest, ctrl.bRequestType,
640 ctrl.wValue, ctrl.wIndex, tbuf, ctrl.wLength, tmo);
641 usb_lock_device(dev);
642 if ((i > 0) && ctrl.wLength) {
643 if (usbfs_snoop) {
644 dev_info(&dev->dev, "control read: data ");
fe0410c7 645 for (j = 0; j < i; ++j)
e639dd3f 646 printk("%02x ", (unsigned char)(tbuf)[j]);
1da177e4
LT		 647 printk("\n");
648 }
fe0410c7 649 if (copy_to_user(ctrl.data, tbuf, i)) {
1da177e4
LT		 650 free_page((unsigned long)tbuf);
651 return -EFAULT;
652 }
653 }
654 } else {
655 if (ctrl.wLength) {
656 if (copy_from_user(tbuf, ctrl.data, ctrl.wLength)) {
657 free_page((unsigned long)tbuf);
658 return -EFAULT;
659 }
660 }
fe0410c7
AS		 661 snoop(&dev->dev, "control write: bRequest=%02x "
662 "bRrequestType=%02x wValue=%04x "
663 "wIndex=%04x wLength=%04x\n",
664 ctrl.bRequest, ctrl.bRequestType, ctrl.wValue,
665 ctrl.wIndex, ctrl.wLength);
1da177e4
LT		 666 if (usbfs_snoop) {
667 dev_info(&dev->dev, "control write: data: ");
668 for (j = 0; j < ctrl.wLength; ++j)
e639dd3f 669 printk("%02x ", (unsigned char)(tbuf)[j]);
1da177e4
LT		 670 printk("\n");
671 }
672 usb_unlock_device(dev);
673 i = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), ctrl.bRequest, ctrl.bRequestType,
674 ctrl.wValue, ctrl.wIndex, tbuf, ctrl.wLength, tmo);
675 usb_lock_device(dev);
676 }
677 free_page((unsigned long)tbuf);
678 if (i<0 && i != -EPIPE) {
679 dev_printk(KERN_DEBUG, &dev->dev, "usbfs: USBDEVFS_CONTROL "
680 "failed cmd %s rqt %u rq %u len %u ret %d\n",
681 current->comm, ctrl.bRequestType, ctrl.bRequest,
682 ctrl.wLength, i);
683 }
684 return i;
685}
686
687static int proc_bulk(struct dev_state *ps, void __user *arg)
688{
689 struct usb_device *dev = ps->dev;
690 struct usbdevfs_bulktransfer bulk;
691 unsigned int tmo, len1, pipe;
692 int len2;
693 unsigned char *tbuf;
e639dd3f 694 int i, j, ret;
1da177e4
LT		 695
696 if (copy_from_user(&bulk, arg, sizeof(bulk)))
697 return -EFAULT;
698 if ((ret = findintfep(ps->dev, bulk.ep)) < 0)
699 return ret;
700 if ((ret = checkintf(ps, ret)))
701 return ret;
702 if (bulk.ep & USB_DIR_IN)
703 pipe = usb_rcvbulkpipe(dev, bulk.ep & 0x7f);
704 else
705 pipe = usb_sndbulkpipe(dev, bulk.ep & 0x7f);
706 if (!usb_maxpacket(dev, pipe, !(bulk.ep & USB_DIR_IN)))
707 return -EINVAL;
708 len1 = bulk.len;
709 if (len1 > MAX_USBFS_BUFFER_SIZE)
710 return -EINVAL;
711 if (!(tbuf = kmalloc(len1, GFP_KERNEL)))
712 return -ENOMEM;
713 tmo = bulk.timeout;
714 if (bulk.ep & 0x80) {
715 if (len1 && !access_ok(VERIFY_WRITE, bulk.data, len1)) {
716 kfree(tbuf);
717 return -EINVAL;
718 }
e639dd3f
GKH		 719 snoop(&dev->dev, "bulk read: len=0x%02x timeout=%04d\n",
720 bulk.len, bulk.timeout);
1da177e4
LT		 721 usb_unlock_device(dev);
722 i = usb_bulk_msg(dev, pipe, tbuf, len1, &len2, tmo);
723 usb_lock_device(dev);
724 if (!i && len2) {
e639dd3f
GKH		 725 if (usbfs_snoop) {
726 dev_info(&dev->dev, "bulk read: data ");
727 for (j = 0; j < len2; ++j)
728 printk("%02x ", (unsigned char)(tbuf)[j]);
729 printk("\n");
730 }
1da177e4
LT		 731 if (copy_to_user(bulk.data, tbuf, len2)) {
732 kfree(tbuf);
733 return -EFAULT;
734 }
735 }
736 } else {
737 if (len1) {
738 if (copy_from_user(tbuf, bulk.data, len1)) {
739 kfree(tbuf);
740 return -EFAULT;
741 }
742 }
e639dd3f
GKH		 743 snoop(&dev->dev, "bulk write: len=0x%02x timeout=%04d\n",
744 bulk.len, bulk.timeout);
745 if (usbfs_snoop) {
746 dev_info(&dev->dev, "bulk write: data: ");
747 for (j = 0; j < len1; ++j)
748 printk("%02x ", (unsigned char)(tbuf)[j]);
749 printk("\n");
750 }
1da177e4
LT		 751 usb_unlock_device(dev);
752 i = usb_bulk_msg(dev, pipe, tbuf, len1, &len2, tmo);
753 usb_lock_device(dev);
754 }
755 kfree(tbuf);
756 if (i < 0)
757 return i;
758 return len2;
759}
760
761static int proc_resetep(struct dev_state *ps, void __user *arg)
762{
763 unsigned int ep;
764 int ret;
765
766 if (get_user(ep, (unsigned int __user *)arg))
767 return -EFAULT;
768 if ((ret = findintfep(ps->dev, ep)) < 0)
769 return ret;
770 if ((ret = checkintf(ps, ret)))
771 return ret;
772 usb_settoggle(ps->dev, ep & 0xf, !(ep & USB_DIR_IN), 0);
773 return 0;
774}
775
776static int proc_clearhalt(struct dev_state *ps, void __user *arg)
777{
778 unsigned int ep;
779 int pipe;
780 int ret;
781
782 if (get_user(ep, (unsigned int __user *)arg))
783 return -EFAULT;
784 if ((ret = findintfep(ps->dev, ep)) < 0)
785 return ret;
786 if ((ret = checkintf(ps, ret)))
787 return ret;
788 if (ep & USB_DIR_IN)
789 pipe = usb_rcvbulkpipe(ps->dev, ep & 0x7f);
790 else
791 pipe = usb_sndbulkpipe(ps->dev, ep & 0x7f);
792
793 return usb_clear_halt(ps->dev, pipe);
794}
795
796
797static int proc_getdriver(struct dev_state *ps, void __user *arg)
798{
799 struct usbdevfs_getdriver gd;
800 struct usb_interface *intf;
801 int ret;
802
803 if (copy_from_user(&gd, arg, sizeof(gd)))
804 return -EFAULT;
805 down_read(&usb_bus_type.subsys.rwsem);
806 intf = usb_ifnum_to_if(ps->dev, gd.interface);
807 if (!intf || !intf->dev.driver)
808 ret = -ENODATA;
809 else {
810 strncpy(gd.driver, intf->dev.driver->name,
811 sizeof(gd.driver));
812 ret = (copy_to_user(arg, &gd, sizeof(gd)) ? -EFAULT : 0);
813 }
814 up_read(&usb_bus_type.subsys.rwsem);
815 return ret;
816}
817
818static int proc_connectinfo(struct dev_state *ps, void __user *arg)
819{
820 struct usbdevfs_connectinfo ci;
821
822 ci.devnum = ps->dev->devnum;
823 ci.slow = ps->dev->speed == USB_SPEED_LOW;
824 if (copy_to_user(arg, &ci, sizeof(ci)))
825 return -EFAULT;
826 return 0;
827}
828
829static int proc_resetdevice(struct dev_state *ps)
830{
831 return usb_reset_device(ps->dev);
832
833}
834
835static int proc_setintf(struct dev_state *ps, void __user *arg)
836{
837 struct usbdevfs_setinterface setintf;
838 int ret;
839
840 if (copy_from_user(&setintf, arg, sizeof(setintf)))
841 return -EFAULT;
842 if ((ret = checkintf(ps, setintf.interface)))
843 return ret;
844 return usb_set_interface(ps->dev, setintf.interface,
845 setintf.altsetting);
846}
847
848static int proc_setconfig(struct dev_state *ps, void __user *arg)
849{
850 unsigned int u;
851 int status = 0;
852 struct usb_host_config *actconfig;
853
854 if (get_user(u, (unsigned int __user *)arg))
855 return -EFAULT;
856
857 actconfig = ps->dev->actconfig;
858
859 /* Don't touch the device if any interfaces are claimed.
860 * It could interfere with other drivers' operations, and if
861 * an interface is claimed by usbfs it could easily deadlock.
862 */
863 if (actconfig) {
864 int i;
865
866 for (i = 0; i < actconfig->desc.bNumInterfaces; ++i) {
867 if (usb_interface_claimed(actconfig->interface[i])) {
868 dev_warn (&ps->dev->dev,
72ebddb5 869 "usbfs: interface %d claimed by %s "
1da177e4
LT		 870 "while '%s' sets config #%d\n",
871 actconfig->interface[i]
872 ->cur_altsetting
873 ->desc.bInterfaceNumber,
72ebddb5
DB		 874 actconfig->interface[i]
875 ->dev.driver->name,
1da177e4 876 current->comm, u);
1da177e4
LT		 877 status = -EBUSY;
878 break;
1da177e4
LT		 879 }
880 }
881 }
882
883 /* SET_CONFIGURATION is often abused as a "cheap" driver reset,
884 * so avoid usb_set_configuration()'s kick to sysfs
885 */
886 if (status == 0) {
887 if (actconfig && actconfig->desc.bConfigurationValue == u)
888 status = usb_reset_configuration(ps->dev);
889 else
890 status = usb_set_configuration(ps->dev, u);
891 }
892
893 return status;
894}
895
1da177e4
LT		 896static int proc_do_submiturb(struct dev_state *ps, struct usbdevfs_urb *uurb,
897 struct usbdevfs_iso_packet_desc __user *iso_frame_desc,
898 void __user *arg)
899{
900 struct usbdevfs_iso_packet_desc *isopkt = NULL;
901 struct usb_host_endpoint *ep;
902 struct async *as;
903 struct usb_ctrlrequest *dr = NULL;
904 unsigned int u, totlen, isofrmlen;
905 int ret, interval = 0, ifnum = -1;
906
907 if (uurb->flags & ~(USBDEVFS_URB_ISO_ASAP|USBDEVFS_URB_SHORT_NOT_OK|
908 URB_NO_FSBR|URB_ZERO_PACKET))
909 return -EINVAL;
910 if (!uurb->buffer)
911 return -EINVAL;
912 if (uurb->signr != 0 && (uurb->signr < SIGRTMIN || uurb->signr > SIGRTMAX))
913 return -EINVAL;
914 if (!(uurb->type == USBDEVFS_URB_TYPE_CONTROL && (uurb->endpoint & ~USB_ENDPOINT_DIR_MASK) == 0)) {
915 if ((ifnum = findintfep(ps->dev, uurb->endpoint)) < 0)
916 return ifnum;
917 if ((ret = checkintf(ps, ifnum)))
918 return ret;
919 }
920 if ((uurb->endpoint & USB_ENDPOINT_DIR_MASK) != 0)
921 ep = ps->dev->ep_in [uurb->endpoint & USB_ENDPOINT_NUMBER_MASK];
922 else
923 ep = ps->dev->ep_out [uurb->endpoint & USB_ENDPOINT_NUMBER_MASK];
924 if (!ep)
925 return -ENOENT;
926 switch(uurb->type) {
927 case USBDEVFS_URB_TYPE_CONTROL:
928 if ((ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK)
929 != USB_ENDPOINT_XFER_CONTROL)
930 return -EINVAL;
931 /* min 8 byte setup packet, max arbitrary */
932 if (uurb->buffer_length < 8 || uurb->buffer_length > PAGE_SIZE)
933 return -EINVAL;
934 if (!(dr = kmalloc(sizeof(struct usb_ctrlrequest), GFP_KERNEL)))
935 return -ENOMEM;
936 if (copy_from_user(dr, uurb->buffer, 8)) {
937 kfree(dr);
938 return -EFAULT;
939 }
940 if (uurb->buffer_length < (le16_to_cpup(&dr->wLength) + 8)) {
941 kfree(dr);
942 return -EINVAL;
943 }
944 if ((ret = check_ctrlrecip(ps, dr->bRequestType, le16_to_cpup(&dr->wIndex)))) {
945 kfree(dr);
946 return ret;
947 }
948 uurb->endpoint = (uurb->endpoint & ~USB_ENDPOINT_DIR_MASK) | (dr->bRequestType & USB_ENDPOINT_DIR_MASK);
949 uurb->number_of_packets = 0;
950 uurb->buffer_length = le16_to_cpup(&dr->wLength);
951 uurb->buffer += 8;
952 if (!access_ok((uurb->endpoint & USB_DIR_IN) ? VERIFY_WRITE : VERIFY_READ, uurb->buffer, uurb->buffer_length)) {
953 kfree(dr);
954 return -EFAULT;
955 }
e639dd3f 956 snoop(&ps->dev->dev, "control urb\n");
1da177e4
LT		 957 break;
958
959 case USBDEVFS_URB_TYPE_BULK:
960 switch (ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) {
961 case USB_ENDPOINT_XFER_CONTROL:
962 case USB_ENDPOINT_XFER_ISOC:
963 return -EINVAL;
964 /* allow single-shot interrupt transfers, at bogus rates */
965 }
966 uurb->number_of_packets = 0;
967 if (uurb->buffer_length > MAX_USBFS_BUFFER_SIZE)
968 return -EINVAL;
969 if (!access_ok((uurb->endpoint & USB_DIR_IN) ? VERIFY_WRITE : VERIFY_READ, uurb->buffer, uurb->buffer_length))
970 return -EFAULT;
e639dd3f 971 snoop(&ps->dev->dev, "bulk urb\n");
1da177e4
LT		 972 break;
973
974 case USBDEVFS_URB_TYPE_ISO:
975 /* arbitrary limit */
976 if (uurb->number_of_packets < 1 || uurb->number_of_packets > 128)
977 return -EINVAL;
978 if ((ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK)
979 != USB_ENDPOINT_XFER_ISOC)
980 return -EINVAL;
981 interval = 1 << min (15, ep->desc.bInterval - 1);
982 isofrmlen = sizeof(struct usbdevfs_iso_packet_desc) * uurb->number_of_packets;
983 if (!(isopkt = kmalloc(isofrmlen, GFP_KERNEL)))
984 return -ENOMEM;
985 if (copy_from_user(isopkt, iso_frame_desc, isofrmlen)) {
986 kfree(isopkt);
987 return -EFAULT;
988 }
989 for (totlen = u = 0; u < uurb->number_of_packets; u++) {
990 if (isopkt[u].length > 1023) {
991 kfree(isopkt);
992 return -EINVAL;
993 }
994 totlen += isopkt[u].length;
995 }
996 if (totlen > 32768) {
997 kfree(isopkt);
998 return -EINVAL;
999 }
1000 uurb->buffer_length = totlen;
e639dd3f 1001 snoop(&ps->dev->dev, "iso urb\n");
1da177e4
LT		 1002 break;
1003
1004 case USBDEVFS_URB_TYPE_INTERRUPT:
1005 uurb->number_of_packets = 0;
1006 if ((ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK)
1007 != USB_ENDPOINT_XFER_INT)
1008 return -EINVAL;
1009 if (ps->dev->speed == USB_SPEED_HIGH)
1010 interval = 1 << min (15, ep->desc.bInterval - 1);
1011 else
1012 interval = ep->desc.bInterval;
1013 if (uurb->buffer_length > MAX_USBFS_BUFFER_SIZE)
1014 return -EINVAL;
1015 if (!access_ok((uurb->endpoint & USB_DIR_IN) ? VERIFY_WRITE : VERIFY_READ, uurb->buffer, uurb->buffer_length))
1016 return -EFAULT;
e639dd3f 1017 snoop(&ps->dev->dev, "interrupt urb\n");
1da177e4
LT		 1018 break;
1019
1020 default:
1021 return -EINVAL;
1022 }
1023 if (!(as = alloc_async(uurb->number_of_packets))) {
6fd19f4b
JJ		 1024 kfree(isopkt);
1025 kfree(dr);
1da177e4
LT		 1026 return -ENOMEM;
1027 }
1028 if (!(as->urb->transfer_buffer = kmalloc(uurb->buffer_length, GFP_KERNEL))) {
6fd19f4b
JJ		 1029 kfree(isopkt);
1030 kfree(dr);
1da177e4
LT		 1031 free_async(as);
1032 return -ENOMEM;
1033 }
1034 as->urb->dev = ps->dev;
1035 as->urb->pipe = (uurb->type << 30) | __create_pipe(ps->dev, uurb->endpoint & 0xf) | (uurb->endpoint & USB_DIR_IN);
1036 as->urb->transfer_flags = uurb->flags;
1037 as->urb->transfer_buffer_length = uurb->buffer_length;
1038 as->urb->setup_packet = (unsigned char*)dr;
1039 as->urb->start_frame = uurb->start_frame;
1040 as->urb->number_of_packets = uurb->number_of_packets;
1041 as->urb->interval = interval;
1042 as->urb->context = as;
1043 as->urb->complete = async_completed;
1044 for (totlen = u = 0; u < uurb->number_of_packets; u++) {
1045 as->urb->iso_frame_desc[u].offset = totlen;
1046 as->urb->iso_frame_desc[u].length = isopkt[u].length;
1047 totlen += isopkt[u].length;
1048 }
6fd19f4b 1049 kfree(isopkt);
1da177e4
LT		 1050 as->ps = ps;
1051 as->userurb = arg;
1052 if (uurb->endpoint & USB_DIR_IN)
1053 as->userbuffer = uurb->buffer;
1054 else
1055 as->userbuffer = NULL;
1056 as->signr = uurb->signr;
1057 as->ifnum = ifnum;
46113830
HW		 1058 as->pid = current->pid;
1059 as->uid = current->uid;
1060 as->euid = current->euid;
1da177e4
LT		 1061 if (!(uurb->endpoint & USB_DIR_IN)) {
1062 if (copy_from_user(as->urb->transfer_buffer, uurb->buffer, as->urb->transfer_buffer_length)) {
1063 free_async(as);
1064 return -EFAULT;
1065 }
1066 }
e639dd3f
GKH		 1067 snoop(&as->urb->dev->dev, "submit urb\n");
1068 snoop_urb(as->urb, as->userurb);
1da177e4
LT		 1069 async_newpending(as);
1070 if ((ret = usb_submit_urb(as->urb, GFP_KERNEL))) {
1071 dev_printk(KERN_DEBUG, &ps->dev->dev, "usbfs: usb_submit_urb returned %d\n", ret);
1072 async_removepending(as);
1073 free_async(as);
1074 return ret;
1075 }
1076 return 0;
1077}
1078
1079static int proc_submiturb(struct dev_state *ps, void __user *arg)
1080{
1081 struct usbdevfs_urb uurb;
1082
1083 if (copy_from_user(&uurb, arg, sizeof(uurb)))
1084 return -EFAULT;
1085
1086 return proc_do_submiturb(ps, &uurb, (((struct usbdevfs_urb __user *)arg)->iso_frame_desc), arg);
1087}
1088
1089static int proc_unlinkurb(struct dev_state *ps, void __user *arg)
1090{
1091 struct async *as;
1092
1093 as = async_getpending(ps, arg);
1094 if (!as)
1095 return -EINVAL;
1096 usb_kill_urb(as->urb);
1097 return 0;
1098}
1099
1100static int processcompl(struct async *as, void __user * __user *arg)
1101{
1102 struct urb *urb = as->urb;
1103 struct usbdevfs_urb __user *userurb = as->userurb;
1104 void __user *addr = as->userurb;
1105 unsigned int i;
1106
1107 if (as->userbuffer)
1108 if (copy_to_user(as->userbuffer, urb->transfer_buffer, urb->transfer_buffer_length))
1109 return -EFAULT;
1110 if (put_user(urb->status, &userurb->status))
1111 return -EFAULT;
1112 if (put_user(urb->actual_length, &userurb->actual_length))
1113 return -EFAULT;
1114 if (put_user(urb->error_count, &userurb->error_count))
1115 return -EFAULT;
1116
668a9541
CL		 1117 if (usb_pipeisoc(urb->pipe)) {
1118 for (i = 0; i < urb->number_of_packets; i++) {
1119 if (put_user(urb->iso_frame_desc[i].actual_length,
1120 &userurb->iso_frame_desc[i].actual_length))
1121 return -EFAULT;
1122 if (put_user(urb->iso_frame_desc[i].status,
1123 &userurb->iso_frame_desc[i].status))
1124 return -EFAULT;
1125 }
1da177e4
LT		 1126 }
1127
1128 free_async(as);
1129
1130 if (put_user(addr, (void __user * __user *)arg))
1131 return -EFAULT;
1132 return 0;
1133}
1134
1135static struct async* reap_as(struct dev_state *ps)
1136{
1137 DECLARE_WAITQUEUE(wait, current);
1138 struct async *as = NULL;
1139 struct usb_device *dev = ps->dev;
1140
1141 add_wait_queue(&ps->wait, &wait);
1142 for (;;) {
1143 __set_current_state(TASK_INTERRUPTIBLE);
1144 if ((as = async_getcompleted(ps)))
1145 break;
1146 if (signal_pending(current))
1147 break;
1148 usb_unlock_device(dev);
1149 schedule();
1150 usb_lock_device(dev);
1151 }
1152 remove_wait_queue(&ps->wait, &wait);
1153 set_current_state(TASK_RUNNING);
1154 return as;
1155}
1156
1157static int proc_reapurb(struct dev_state *ps, void __user *arg)
1158{
1159 struct async *as = reap_as(ps);
1160 if (as)
1161 return processcompl(as, (void __user * __user *)arg);
1162 if (signal_pending(current))
1163 return -EINTR;
1164 return -EIO;
1165}
1166
1167static int proc_reapurbnonblock(struct dev_state *ps, void __user *arg)
1168{
1169 struct async *as;
1170
1171 if (!(as = async_getcompleted(ps)))
1172 return -EAGAIN;
1173 return processcompl(as, (void __user * __user *)arg);
1174}
1175
1176#ifdef CONFIG_COMPAT
1177
1178static int get_urb32(struct usbdevfs_urb *kurb,
1179 struct usbdevfs_urb32 __user *uurb)
1180{
1181 __u32 uptr;
1182 if (get_user(kurb->type, &uurb->type) ||
1183 __get_user(kurb->endpoint, &uurb->endpoint) ||
1184 __get_user(kurb->status, &uurb->status) ||
1185 __get_user(kurb->flags, &uurb->flags) ||
1186 __get_user(kurb->buffer_length, &uurb->buffer_length) ||
1187 __get_user(kurb->actual_length, &uurb->actual_length) ||
1188 __get_user(kurb->start_frame, &uurb->start_frame) ||
1189 __get_user(kurb->number_of_packets, &uurb->number_of_packets) ||
1190 __get_user(kurb->error_count, &uurb->error_count) ||
1191 __get_user(kurb->signr, &uurb->signr))
1192 return -EFAULT;
1193
1194 if (__get_user(uptr, &uurb->buffer))
1195 return -EFAULT;
1196 kurb->buffer = compat_ptr(uptr);
1197 if (__get_user(uptr, &uurb->buffer))
1198 return -EFAULT;
1199 kurb->usercontext = compat_ptr(uptr);
1200
1201 return 0;
1202}
1203
1204static int proc_submiturb_compat(struct dev_state *ps, void __user *arg)
1205{
1206 struct usbdevfs_urb uurb;
1207
1208 if (get_urb32(&uurb,(struct usbdevfs_urb32 *)arg))
1209 return -EFAULT;
1210
668a9541 1211 return proc_do_submiturb(ps, &uurb, ((struct usbdevfs_urb32 __user *)arg)->iso_frame_desc, arg);
1da177e4
LT		 1212}
1213
1214static int processcompl_compat(struct async *as, void __user * __user *arg)
1215{
1216 struct urb *urb = as->urb;
1217 struct usbdevfs_urb32 __user *userurb = as->userurb;
1218 void __user *addr = as->userurb;
1219 unsigned int i;
1220
1221 if (as->userbuffer)
1222 if (copy_to_user(as->userbuffer, urb->transfer_buffer, urb->transfer_buffer_length))
1223 return -EFAULT;
1224 if (put_user(urb->status, &userurb->status))
1225 return -EFAULT;
1226 if (put_user(urb->actual_length, &userurb->actual_length))
1227 return -EFAULT;
1228 if (put_user(urb->error_count, &userurb->error_count))
1229 return -EFAULT;
1230
668a9541
CL		 1231 if (usb_pipeisoc(urb->pipe)) {
1232 for (i = 0; i < urb->number_of_packets; i++) {
1233 if (put_user(urb->iso_frame_desc[i].actual_length,
1234 &userurb->iso_frame_desc[i].actual_length))
1235 return -EFAULT;
1236 if (put_user(urb->iso_frame_desc[i].status,
1237 &userurb->iso_frame_desc[i].status))
1238 return -EFAULT;
1239 }
1da177e4
LT		 1240 }
1241
1242 free_async(as);
1243 if (put_user((u32)(u64)addr, (u32 __user *)arg))
1244 return -EFAULT;
1245 return 0;
1246}
1247
1248static int proc_reapurb_compat(struct dev_state *ps, void __user *arg)
1249{
1250 struct async *as = reap_as(ps);
1251 if (as)
1252 return processcompl_compat(as, (void __user * __user *)arg);
1253 if (signal_pending(current))
1254 return -EINTR;
1255 return -EIO;
1256}
1257
1258static int proc_reapurbnonblock_compat(struct dev_state *ps, void __user *arg)
1259{
1260 struct async *as;
1261
1da177e4
LT		 1262 if (!(as = async_getcompleted(ps)))
1263 return -EAGAIN;
1da177e4
LT		 1264 return processcompl_compat(as, (void __user * __user *)arg);
1265}
1266
1267#endif
1268
1269static int proc_disconnectsignal(struct dev_state *ps, void __user *arg)
1270{
1271 struct usbdevfs_disconnectsignal ds;
1272
1273 if (copy_from_user(&ds, arg, sizeof(ds)))
1274 return -EFAULT;
1275 if (ds.signr != 0 && (ds.signr < SIGRTMIN || ds.signr > SIGRTMAX))
1276 return -EINVAL;
1277 ps->discsignr = ds.signr;
1278 ps->disccontext = ds.context;
1279 return 0;
1280}
1281
1282static int proc_claiminterface(struct dev_state *ps, void __user *arg)
1283{
1284 unsigned int ifnum;
1285
1286 if (get_user(ifnum, (unsigned int __user *)arg))
1287 return -EFAULT;
1288 return claimintf(ps, ifnum);
1289}
1290
1291static int proc_releaseinterface(struct dev_state *ps, void __user *arg)
1292{
1293 unsigned int ifnum;
1294 int ret;
1295
1296 if (get_user(ifnum, (unsigned int __user *)arg))
1297 return -EFAULT;
1298 if ((ret = releaseintf(ps, ifnum)) < 0)
1299 return ret;
1300 destroy_async_on_interface (ps, ifnum);
1301 return 0;
1302}
1303
c36fc889 1304static int proc_ioctl(struct dev_state *ps, struct usbdevfs_ioctl *ctl)
1da177e4 1305{
1da177e4
LT		 1306 int size;
1307 void *buf = NULL;
1308 int retval = 0;
1309 struct usb_interface *intf = NULL;
1310 struct usb_driver *driver = NULL;
1da177e4 1311
c36fc889
PZ		 1312 /* alloc buffer */
1313 if ((size = _IOC_SIZE (ctl->ioctl_code)) > 0) {
1da177e4
LT		 1314 if ((buf = kmalloc (size, GFP_KERNEL)) == NULL)
1315 return -ENOMEM;
c36fc889
PZ		 1316 if ((_IOC_DIR(ctl->ioctl_code) & _IOC_WRITE)) {
1317 if (copy_from_user (buf, ctl->data, size)) {
6fd19f4b 1318 kfree(buf);
1da177e4
LT		 1319 return -EFAULT;
1320 }
1321 } else {
1322 memset (buf, 0, size);
1323 }
1324 }
1325
1326 if (!connected(ps->dev)) {
6fd19f4b 1327 kfree(buf);
1da177e4
LT		 1328 return -ENODEV;
1329 }
1330
1331 if (ps->dev->state != USB_STATE_CONFIGURED)
1332 retval = -EHOSTUNREACH;
c36fc889 1333 else if (!(intf = usb_ifnum_to_if (ps->dev, ctl->ifno)))
1da177e4 1334 retval = -EINVAL;
c36fc889 1335 else switch (ctl->ioctl_code) {
1da177e4
LT		 1336
1337 /* disconnect kernel driver from interface */
1338 case USBDEVFS_DISCONNECT:
1339
1da177e4
LT		 1340 down_write(&usb_bus_type.subsys.rwsem);
1341 if (intf->dev.driver) {
1342 driver = to_usb_driver(intf->dev.driver);
1343 dev_dbg (&intf->dev, "disconnect by usbfs\n");
1344 usb_driver_release_interface(driver, intf);
1345 } else
1346 retval = -ENODATA;
1347 up_write(&usb_bus_type.subsys.rwsem);
1348 break;
1349
1350 /* let kernel drivers try to (re)bind to the interface */
1351 case USBDEVFS_CONNECT:
1352 usb_unlock_device(ps->dev);
1353 usb_lock_all_devices();
1354 bus_rescan_devices(intf->dev.bus);
1355 usb_unlock_all_devices();
1356 usb_lock_device(ps->dev);
1357 break;
1358
1359 /* talk directly to the interface's driver */
1360 default:
1361 down_read(&usb_bus_type.subsys.rwsem);
1362 if (intf->dev.driver)
1363 driver = to_usb_driver(intf->dev.driver);
1364 if (driver == NULL || driver->ioctl == NULL) {
1365 retval = -ENOTTY;
1366 } else {
c36fc889 1367 retval = driver->ioctl (intf, ctl->ioctl_code, buf);
1da177e4
LT		 1368 if (retval == -ENOIOCTLCMD)
1369 retval = -ENOTTY;
1370 }
1371 up_read(&usb_bus_type.subsys.rwsem);
1372 }
1373
1374 /* cleanup and return */
1375 if (retval >= 0
c36fc889 1376 && (_IOC_DIR (ctl->ioctl_code) & _IOC_READ) != 0
1da177e4 1377 && size > 0
c36fc889 1378 && copy_to_user (ctl->data, buf, size) != 0)
1da177e4 1379 retval = -EFAULT;
6fd19f4b
JJ		 1380
1381 kfree(buf);
1da177e4
LT		 1382 return retval;
1383}
1384
c36fc889
PZ		 1385static int proc_ioctl_default(struct dev_state *ps, void __user *arg)
1386{
1387 struct usbdevfs_ioctl ctrl;
1388
1389 if (copy_from_user(&ctrl, arg, sizeof (ctrl)))
1390 return -EFAULT;
1391 return proc_ioctl(ps, &ctrl);
1392}
1393
1394#ifdef CONFIG_COMPAT
1395static int proc_ioctl_compat(struct dev_state *ps, void __user *arg)
1396{
1397 struct usbdevfs_ioctl32 __user *uioc;
1398 struct usbdevfs_ioctl ctrl;
1399 u32 udata;
1400
1401 uioc = compat_ptr(arg);
1402 if (get_user(ctrl.ifno, &uioc->ifno) ||
1403 get_user(ctrl.ioctl_code, &uioc->ioctl_code) ||
1404 __get_user(udata, &uioc->data))
1405 return -EFAULT;
1406 ctrl.data = compat_ptr(udata);
1407
1408 return proc_ioctl(ps, &ctrl);
1409}
1410#endif
1411
1da177e4
LT		 1412/*
1413 * NOTE: All requests here that have interface numbers as parameters
1414 * are assuming that somehow the configuration has been prevented from
1415 * changing. But there's no mechanism to ensure that...
1416 */
1417static int usbdev_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)
1418{
1419 struct dev_state *ps = (struct dev_state *)file->private_data;
1420 struct usb_device *dev = ps->dev;
1421 void __user *p = (void __user *)arg;
1422 int ret = -ENOTTY;
1423
1424 if (!(file->f_mode & FMODE_WRITE))
1425 return -EPERM;
1426 usb_lock_device(dev);
1427 if (!connected(dev)) {
1428 usb_unlock_device(dev);
1429 return -ENODEV;
1430 }
1431
1432 switch (cmd) {
1433 case USBDEVFS_CONTROL:
1434 snoop(&dev->dev, "%s: CONTROL\n", __FUNCTION__);
1435 ret = proc_control(ps, p);
1436 if (ret >= 0)
1437 inode->i_mtime = CURRENT_TIME;
1438 break;
1439
1440 case USBDEVFS_BULK:
1441 snoop(&dev->dev, "%s: BULK\n", __FUNCTION__);
1442 ret = proc_bulk(ps, p);
1443 if (ret >= 0)
1444 inode->i_mtime = CURRENT_TIME;
1445 break;
1446
1447 case USBDEVFS_RESETEP:
1448 snoop(&dev->dev, "%s: RESETEP\n", __FUNCTION__);
1449 ret = proc_resetep(ps, p);
1450 if (ret >= 0)
1451 inode->i_mtime = CURRENT_TIME;
1452 break;
1453
1454 case USBDEVFS_RESET:
1455 snoop(&dev->dev, "%s: RESET\n", __FUNCTION__);
1456 ret = proc_resetdevice(ps);
1457 break;
1458
1459 case USBDEVFS_CLEAR_HALT:
1460 snoop(&dev->dev, "%s: CLEAR_HALT\n", __FUNCTION__);
1461 ret = proc_clearhalt(ps, p);
1462 if (ret >= 0)
1463 inode->i_mtime = CURRENT_TIME;
1464 break;
1465
1466 case USBDEVFS_GETDRIVER:
1467 snoop(&dev->dev, "%s: GETDRIVER\n", __FUNCTION__);
1468 ret = proc_getdriver(ps, p);
1469 break;
1470
1471 case USBDEVFS_CONNECTINFO:
1472 snoop(&dev->dev, "%s: CONNECTINFO\n", __FUNCTION__);
1473 ret = proc_connectinfo(ps, p);
1474 break;
1475
1476 case USBDEVFS_SETINTERFACE:
1477 snoop(&dev->dev, "%s: SETINTERFACE\n", __FUNCTION__);
1478 ret = proc_setintf(ps, p);
1479 break;
1480
1481 case USBDEVFS_SETCONFIGURATION:
1482 snoop(&dev->dev, "%s: SETCONFIGURATION\n", __FUNCTION__);
1483 ret = proc_setconfig(ps, p);
1484 break;
1485
1486 case USBDEVFS_SUBMITURB:
1487 snoop(&dev->dev, "%s: SUBMITURB\n", __FUNCTION__);
1488 ret = proc_submiturb(ps, p);
1489 if (ret >= 0)
1490 inode->i_mtime = CURRENT_TIME;
1491 break;
1492
1493#ifdef CONFIG_COMPAT
1494
1495 case USBDEVFS_SUBMITURB32:
1496 snoop(&dev->dev, "%s: SUBMITURB32\n", __FUNCTION__);
1497 ret = proc_submiturb_compat(ps, p);
1498 if (ret >= 0)
1499 inode->i_mtime = CURRENT_TIME;
1500 break;
1501
1502 case USBDEVFS_REAPURB32:
1503 snoop(&dev->dev, "%s: REAPURB32\n", __FUNCTION__);
1504 ret = proc_reapurb_compat(ps, p);
1505 break;
1506
1507 case USBDEVFS_REAPURBNDELAY32:
1508 snoop(&dev->dev, "%s: REAPURBDELAY32\n", __FUNCTION__);
1509 ret = proc_reapurbnonblock_compat(ps, p);
1510 break;
1511
c36fc889
PZ		 1512 case USBDEVFS_IOCTL32:
1513 snoop(&dev->dev, "%s: IOCTL\n", __FUNCTION__);
1514 ret = proc_ioctl_compat(ps, p);
1515 break;
1da177e4
LT		 1516#endif
1517
1518 case USBDEVFS_DISCARDURB:
1519 snoop(&dev->dev, "%s: DISCARDURB\n", __FUNCTION__);
1520 ret = proc_unlinkurb(ps, p);
1521 break;
1522
1523 case USBDEVFS_REAPURB:
1524 snoop(&dev->dev, "%s: REAPURB\n", __FUNCTION__);
1525 ret = proc_reapurb(ps, p);
1526 break;
1527
1528 case USBDEVFS_REAPURBNDELAY:
1529 snoop(&dev->dev, "%s: REAPURBDELAY\n", __FUNCTION__);
1530 ret = proc_reapurbnonblock(ps, p);
1531 break;
1532
1533 case USBDEVFS_DISCSIGNAL:
1534 snoop(&dev->dev, "%s: DISCSIGNAL\n", __FUNCTION__);
1535 ret = proc_disconnectsignal(ps, p);
1536 break;
1537
1538 case USBDEVFS_CLAIMINTERFACE:
1539 snoop(&dev->dev, "%s: CLAIMINTERFACE\n", __FUNCTION__);
1540 ret = proc_claiminterface(ps, p);
1541 break;
1542
1543 case USBDEVFS_RELEASEINTERFACE:
1544 snoop(&dev->dev, "%s: RELEASEINTERFACE\n", __FUNCTION__);
1545 ret = proc_releaseinterface(ps, p);
1546 break;
1547
1548 case USBDEVFS_IOCTL:
1549 snoop(&dev->dev, "%s: IOCTL\n", __FUNCTION__);
c36fc889 1550 ret = proc_ioctl_default(ps, p);
1da177e4
LT		 1551 break;
1552 }
1553 usb_unlock_device(dev);
1554 if (ret >= 0)
1555 inode->i_atime = CURRENT_TIME;
1556 return ret;
1557}
1558
1559/* No kernel lock - fine */
1560static unsigned int usbdev_poll(struct file *file, struct poll_table_struct *wait)
1561{
1562 struct dev_state *ps = (struct dev_state *)file->private_data;
1563 unsigned int mask = 0;
1564
1565 poll_wait(file, &ps->wait, wait);
1566 if (file->f_mode & FMODE_WRITE && !list_empty(&ps->async_completed))
1567 mask |= POLLOUT | POLLWRNORM;
1568 if (!connected(ps->dev))
1569 mask |= POLLERR | POLLHUP;
1570 return mask;
1571}
1572
1573struct file_operations usbfs_device_file_operations = {
1574 .llseek = usbdev_lseek,
1575 .read = usbdev_read,
1576 .poll = usbdev_poll,
1577 .ioctl = usbdev_ioctl,
1578 .open = usbdev_open,
1579 .release = usbdev_release,
1580};
fbf82fd2 1581
a7b986b3 1582static void usbdev_add(struct usb_device *dev)
fbf82fd2
KS		 1583{
1584 int minor = ((dev->bus->busnum-1) * 128) + (dev->devnum-1);
1585
53f46542 1586 dev->class_dev = class_device_create(usb_device_class, NULL,
fbf82fd2
KS		 1587 MKDEV(USB_DEVICE_MAJOR, minor), &dev->dev,
1588 "usbdev%d.%d", dev->bus->busnum, dev->devnum);
1589
1590 dev->class_dev->class_data = dev;
1591}
1592
a7b986b3 1593static void usbdev_remove(struct usb_device *dev)
fbf82fd2
KS		 1594{
1595 class_device_unregister(dev->class_dev);
1596}
1597
a7b986b3
GKH		 1598static int usbdev_notify(struct notifier_block *self, unsigned long action,
1599 void *dev)
1600{
1601 switch (action) {
1602 case USB_DEVICE_ADD:
1603 usbdev_add(dev);
1604 break;
1605 case USB_DEVICE_REMOVE:
1606 usbdev_remove(dev);
1607 break;
1608 }
1609 return NOTIFY_OK;
1610}
1611
1612static struct notifier_block usbdev_nb = {
1613 .notifier_call = usbdev_notify,
1614};
1615
fbf82fd2
KS		 1616static struct cdev usb_device_cdev = {
1617 .kobj = {.name = "usb_device", },
1618 .owner = THIS_MODULE,
1619};
1620
1621int __init usbdev_init(void)
1622{
1623 int retval;
1624
fad21bdf
AS		 1625 retval = register_chrdev_region(USB_DEVICE_DEV, USB_DEVICE_MAX,
1626 "usb_device");
fbf82fd2
KS		 1627 if (retval) {
1628 err("unable to register minors for usb_device");
1629 goto out;
1630 }
1631 cdev_init(&usb_device_cdev, &usbfs_device_file_operations);
fad21bdf 1632 retval = cdev_add(&usb_device_cdev, USB_DEVICE_DEV, USB_DEVICE_MAX);
fbf82fd2
KS		 1633 if (retval) {
1634 err("unable to get usb_device major %d", USB_DEVICE_MAJOR);
a7b986b3 1635 goto error_cdev;
fbf82fd2
KS		 1636 }
1637 usb_device_class = class_create(THIS_MODULE, "usb_device");
1638 if (IS_ERR(usb_device_class)) {
1639 err("unable to register usb_device class");
1640 retval = PTR_ERR(usb_device_class);
a7b986b3 1641 goto error_class;
fbf82fd2
KS		 1642 }
1643
a7b986b3
GKH		 1644 usb_register_notify(&usbdev_nb);
1645
fbf82fd2
KS		 1646out:
1647 return retval;
a7b986b3
GKH		 1648
1649error_class:
1650 usb_device_class = NULL;
1651 cdev_del(&usb_device_cdev);
1652
1653error_cdev:
1654 unregister_chrdev_region(USB_DEVICE_DEV, USB_DEVICE_MAX);
1655 goto out;
fbf82fd2
KS		 1656}
1657
1658void usbdev_cleanup(void)
1659{
a7b986b3 1660 usb_unregister_notify(&usbdev_nb);
fbf82fd2
KS		 1661 class_destroy(usb_device_class);
1662 cdev_del(&usb_device_cdev);
fad21bdf 1663 unregister_chrdev_region(USB_DEVICE_DEV, USB_DEVICE_MAX);
fbf82fd2
KS		 1664}
1665
kernel source for telekom puls (alcatel/mediatek)