]>
Commit | Line | Data |
---|---|---|
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 | |
59 | static struct class *usb_device_class; | |
60 | ||
1da177e4 LT |
61 | struct 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 | ||
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 | ||
fad21bdf AS |
83 | #define USB_DEVICE_DEV MKDEV(USB_DEVICE_MAJOR, 0) |
84 | ||
1da177e4 LT |
85 | |
86 | #define MAX_USBFS_BUFFER_SIZE 16384 | |
87 | ||
88 | static inline int connected (struct usb_device *dev) | |
89 | { | |
90 | return dev->state != USB_STATE_NOTATTACHED; | |
91 | } | |
92 | ||
93 | static loff_t usbdev_lseek(struct file *file, loff_t offset, int orig) | |
94 | { | |
95 | loff_t ret; | |
96 | ||
97 | lock_kernel(); | |
98 | ||
99 | switch (orig) { | |
100 | case 0: | |
101 | file->f_pos = offset; | |
102 | ret = file->f_pos; | |
103 | break; | |
104 | case 1: | |
105 | file->f_pos += offset; | |
106 | ret = file->f_pos; | |
107 | break; | |
108 | case 2: | |
109 | default: | |
110 | ret = -EINVAL; | |
111 | } | |
112 | ||
113 | unlock_kernel(); | |
114 | return ret; | |
115 | } | |
116 | ||
117 | static ssize_t usbdev_read(struct file *file, char __user *buf, size_t nbytes, loff_t *ppos) | |
118 | { | |
119 | struct dev_state *ps = (struct dev_state *)file->private_data; | |
120 | struct usb_device *dev = ps->dev; | |
121 | ssize_t ret = 0; | |
122 | unsigned len; | |
123 | loff_t pos; | |
124 | int i; | |
125 | ||
126 | pos = *ppos; | |
127 | usb_lock_device(dev); | |
128 | if (!connected(dev)) { | |
129 | ret = -ENODEV; | |
130 | goto err; | |
131 | } else if (pos < 0) { | |
132 | ret = -EINVAL; | |
133 | goto err; | |
134 | } | |
135 | ||
136 | if (pos < sizeof(struct usb_device_descriptor)) { | |
137 | struct usb_device_descriptor *desc = kmalloc(sizeof(*desc), GFP_KERNEL); | |
138 | if (!desc) { | |
139 | ret = -ENOMEM; | |
140 | goto err; | |
141 | } | |
142 | memcpy(desc, &dev->descriptor, sizeof(dev->descriptor)); | |
143 | le16_to_cpus(&desc->bcdUSB); | |
144 | le16_to_cpus(&desc->idVendor); | |
145 | le16_to_cpus(&desc->idProduct); | |
146 | le16_to_cpus(&desc->bcdDevice); | |
147 | ||
148 | len = sizeof(struct usb_device_descriptor) - pos; | |
149 | if (len > nbytes) | |
150 | len = nbytes; | |
151 | if (copy_to_user(buf, ((char *)desc) + pos, len)) { | |
152 | kfree(desc); | |
153 | ret = -EFAULT; | |
154 | goto err; | |
155 | } | |
156 | kfree(desc); | |
157 | ||
158 | *ppos += len; | |
159 | buf += len; | |
160 | nbytes -= len; | |
161 | ret += len; | |
162 | } | |
163 | ||
164 | pos = sizeof(struct usb_device_descriptor); | |
165 | for (i = 0; nbytes && i < dev->descriptor.bNumConfigurations; i++) { | |
166 | struct usb_config_descriptor *config = | |
167 | (struct usb_config_descriptor *)dev->rawdescriptors[i]; | |
168 | unsigned int length = le16_to_cpu(config->wTotalLength); | |
169 | ||
170 | if (*ppos < pos + length) { | |
171 | ||
172 | /* The descriptor may claim to be longer than it | |
173 | * really is. Here is the actual allocated length. */ | |
174 | unsigned alloclen = | |
175 | le16_to_cpu(dev->config[i].desc.wTotalLength); | |
176 | ||
177 | len = length - (*ppos - pos); | |
178 | if (len > nbytes) | |
179 | len = nbytes; | |
180 | ||
181 | /* Simply don't write (skip over) unallocated parts */ | |
182 | if (alloclen > (*ppos - pos)) { | |
183 | alloclen -= (*ppos - pos); | |
184 | if (copy_to_user(buf, | |
185 | dev->rawdescriptors[i] + (*ppos - pos), | |
186 | min(len, alloclen))) { | |
187 | ret = -EFAULT; | |
188 | goto err; | |
189 | } | |
190 | } | |
191 | ||
192 | *ppos += len; | |
193 | buf += len; | |
194 | nbytes -= len; | |
195 | ret += len; | |
196 | } | |
197 | ||
198 | pos += length; | |
199 | } | |
200 | ||
201 | err: | |
202 | usb_unlock_device(dev); | |
203 | return ret; | |
204 | } | |
205 | ||
206 | /* | |
207 | * async list handling | |
208 | */ | |
209 | ||
210 | static struct async *alloc_async(unsigned int numisoframes) | |
211 | { | |
212 | unsigned int assize = sizeof(struct async) + numisoframes * sizeof(struct usb_iso_packet_descriptor); | |
213 | struct async *as = kmalloc(assize, GFP_KERNEL); | |
214 | if (!as) | |
215 | return NULL; | |
216 | memset(as, 0, assize); | |
217 | as->urb = usb_alloc_urb(numisoframes, GFP_KERNEL); | |
218 | if (!as->urb) { | |
219 | kfree(as); | |
220 | return NULL; | |
221 | } | |
222 | return as; | |
223 | } | |
224 | ||
225 | static void free_async(struct async *as) | |
226 | { | |
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 | ||
233 | static inline void async_newpending(struct async *as) | |
234 | { | |
235 | struct dev_state *ps = as->ps; | |
236 | unsigned long flags; | |
237 | ||
238 | spin_lock_irqsave(&ps->lock, flags); | |
239 | list_add_tail(&as->asynclist, &ps->async_pending); | |
240 | spin_unlock_irqrestore(&ps->lock, flags); | |
241 | } | |
242 | ||
243 | static inline void async_removepending(struct async *as) | |
244 | { | |
245 | struct dev_state *ps = as->ps; | |
246 | unsigned long flags; | |
247 | ||
248 | spin_lock_irqsave(&ps->lock, flags); | |
249 | list_del_init(&as->asynclist); | |
250 | spin_unlock_irqrestore(&ps->lock, flags); | |
251 | } | |
252 | ||
253 | static inline struct async *async_getcompleted(struct dev_state *ps) | |
254 | { | |
255 | unsigned long flags; | |
256 | struct async *as = NULL; | |
257 | ||
258 | spin_lock_irqsave(&ps->lock, flags); | |
259 | if (!list_empty(&ps->async_completed)) { | |
260 | as = list_entry(ps->async_completed.next, struct async, asynclist); | |
261 | list_del_init(&as->asynclist); | |
262 | } | |
263 | spin_unlock_irqrestore(&ps->lock, flags); | |
264 | return as; | |
265 | } | |
266 | ||
267 | static inline struct async *async_getpending(struct dev_state *ps, void __user *userurb) | |
268 | { | |
269 | unsigned long flags; | |
270 | struct async *as; | |
271 | ||
272 | spin_lock_irqsave(&ps->lock, flags); | |
273 | list_for_each_entry(as, &ps->async_pending, asynclist) | |
274 | if (as->userurb == userurb) { | |
275 | list_del_init(&as->asynclist); | |
276 | spin_unlock_irqrestore(&ps->lock, flags); | |
277 | return as; | |
278 | } | |
279 | spin_unlock_irqrestore(&ps->lock, flags); | |
280 | return NULL; | |
281 | } | |
282 | ||
e639dd3f GKH |
283 | static void snoop_urb(struct urb *urb, void __user *userurb) |
284 | { | |
285 | int j; | |
286 | unsigned char *data = urb->transfer_buffer; | |
287 | ||
288 | if (!usbfs_snoop) | |
289 | return; | |
290 | ||
291 | if (urb->pipe & USB_DIR_IN) | |
292 | dev_info(&urb->dev->dev, "direction=IN\n"); | |
293 | else | |
294 | dev_info(&urb->dev->dev, "direction=OUT\n"); | |
295 | dev_info(&urb->dev->dev, "userurb=%p\n", userurb); | |
296 | dev_info(&urb->dev->dev, "transfer_buffer_length=%d\n", | |
297 | urb->transfer_buffer_length); | |
298 | dev_info(&urb->dev->dev, "actual_length=%d\n", urb->actual_length); | |
299 | dev_info(&urb->dev->dev, "data: "); | |
300 | for (j = 0; j < urb->transfer_buffer_length; ++j) | |
301 | printk ("%02x ", data[j]); | |
302 | printk("\n"); | |
303 | } | |
304 | ||
1da177e4 LT |
305 | static void async_completed(struct urb *urb, struct pt_regs *regs) |
306 | { | |
307 | struct async *as = (struct async *)urb->context; | |
308 | struct dev_state *ps = as->ps; | |
309 | struct siginfo sinfo; | |
310 | ||
311 | spin_lock(&ps->lock); | |
312 | list_move_tail(&as->asynclist, &ps->async_completed); | |
313 | spin_unlock(&ps->lock); | |
314 | if (as->signr) { | |
315 | sinfo.si_signo = as->signr; | |
316 | sinfo.si_errno = as->urb->status; | |
317 | sinfo.si_code = SI_ASYNCIO; | |
318 | sinfo.si_addr = as->userurb; | |
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 | ||
327 | static void destroy_async (struct dev_state *ps, struct list_head *list) | |
328 | { | |
329 | struct async *as; | |
330 | unsigned long flags; | |
331 | ||
332 | spin_lock_irqsave(&ps->lock, flags); | |
333 | while (!list_empty(list)) { | |
334 | as = list_entry(list->next, struct async, asynclist); | |
335 | list_del_init(&as->asynclist); | |
336 | ||
337 | /* drop the spinlock so the completion handler can run */ | |
338 | spin_unlock_irqrestore(&ps->lock, flags); | |
339 | usb_kill_urb(as->urb); | |
340 | spin_lock_irqsave(&ps->lock, flags); | |
341 | } | |
342 | spin_unlock_irqrestore(&ps->lock, flags); | |
343 | as = async_getcompleted(ps); | |
344 | while (as) { | |
345 | free_async(as); | |
346 | as = async_getcompleted(ps); | |
347 | } | |
348 | } | |
349 | ||
350 | static void destroy_async_on_interface (struct dev_state *ps, unsigned int ifnum) | |
351 | { | |
352 | struct list_head *p, *q, hitlist; | |
353 | unsigned long flags; | |
354 | ||
355 | INIT_LIST_HEAD(&hitlist); | |
356 | spin_lock_irqsave(&ps->lock, flags); | |
357 | list_for_each_safe(p, q, &ps->async_pending) | |
358 | if (ifnum == list_entry(p, struct async, asynclist)->ifnum) | |
359 | list_move_tail(p, &hitlist); | |
360 | spin_unlock_irqrestore(&ps->lock, flags); | |
361 | destroy_async(ps, &hitlist); | |
362 | } | |
363 | ||
364 | static inline void destroy_all_async(struct dev_state *ps) | |
365 | { | |
366 | destroy_async(ps, &ps->async_pending); | |
367 | } | |
368 | ||
369 | /* | |
370 | * interface claims are made only at the request of user level code, | |
371 | * which can also release them (explicitly or by closing files). | |
372 | * they're also undone when devices disconnect. | |
373 | */ | |
374 | ||
375 | static int driver_probe (struct usb_interface *intf, | |
376 | const struct usb_device_id *id) | |
377 | { | |
378 | return -ENODEV; | |
379 | } | |
380 | ||
381 | static void driver_disconnect(struct usb_interface *intf) | |
382 | { | |
383 | struct dev_state *ps = usb_get_intfdata (intf); | |
384 | unsigned int ifnum = intf->altsetting->desc.bInterfaceNumber; | |
385 | ||
386 | if (!ps) | |
387 | return; | |
388 | ||
389 | /* NOTE: this relies on usbcore having canceled and completed | |
390 | * all pending I/O requests; 2.6 does that. | |
391 | */ | |
392 | ||
393 | if (likely(ifnum < 8*sizeof(ps->ifclaimed))) | |
394 | clear_bit(ifnum, &ps->ifclaimed); | |
395 | else | |
396 | warn("interface number %u out of range", ifnum); | |
397 | ||
398 | usb_set_intfdata (intf, NULL); | |
399 | ||
400 | /* force async requests to complete */ | |
401 | destroy_async_on_interface(ps, ifnum); | |
402 | } | |
403 | ||
404 | struct usb_driver usbfs_driver = { | |
405 | .owner = THIS_MODULE, | |
406 | .name = "usbfs", | |
407 | .probe = driver_probe, | |
408 | .disconnect = driver_disconnect, | |
409 | }; | |
410 | ||
411 | static 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 | ||
436 | static 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 | ||
459 | static 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 | ||
473 | static 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 | ||
498 | static 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 |
521 | static 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 | */ | |
541 | static 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 | ||
589 | static 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 | ||
610 | static 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 | ||
687 | static 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 | ||
761 | static 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 | ||
776 | static 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 | ||
797 | static 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 | ||
818 | static 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 | ||
829 | static int proc_resetdevice(struct dev_state *ps) | |
830 | { | |
831 | return usb_reset_device(ps->dev); | |
832 | ||
833 | } | |
834 | ||
835 | static 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 | ||
848 | static 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 |
896 | static 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 | ||
1079 | static 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 | ||
1089 | static 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 | ||
1100 | static 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 | ||
1135 | static 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 | ||
1157 | static 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 | ||
1167 | static 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 | ||
1178 | static 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 | ||
1204 | static 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 | ||
1214 | static 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 | ||
1248 | static 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 | ||
1258 | static 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 | ||
1269 | static 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 | ||
1282 | static 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 | ||
1291 | static 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 | 1304 | static 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 |
1385 | static 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 | |
1395 | static 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 | */ | |
1417 | static 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 */ | |
1560 | static 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 | ||
1573 | struct 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 | 1582 | static 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 | 1593 | static void usbdev_remove(struct usb_device *dev) |
fbf82fd2 KS |
1594 | { |
1595 | class_device_unregister(dev->class_dev); | |
1596 | } | |
1597 | ||
a7b986b3 GKH |
1598 | static 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 | ||
1612 | static struct notifier_block usbdev_nb = { | |
1613 | .notifier_call = usbdev_notify, | |
1614 | }; | |
1615 | ||
fbf82fd2 KS |
1616 | static struct cdev usb_device_cdev = { |
1617 | .kobj = {.name = "usb_device", }, | |
1618 | .owner = THIS_MODULE, | |
1619 | }; | |
1620 | ||
1621 | int __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 |
1646 | out: |
1647 | return retval; | |
a7b986b3 GKH |
1648 | |
1649 | error_class: | |
1650 | usb_device_class = NULL; | |
1651 | cdev_del(&usb_device_cdev); | |
1652 | ||
1653 | error_cdev: | |
1654 | unregister_chrdev_region(USB_DEVICE_DEV, USB_DEVICE_MAX); | |
1655 | goto out; | |
fbf82fd2 KS |
1656 | } |
1657 | ||
1658 | void 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 |