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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)) { | |
8781ba0a ON |
137 | struct usb_device_descriptor temp_desc ; /* 18 bytes - fits on the stack */ |
138 | ||
139 | memcpy(&temp_desc, &dev->descriptor, sizeof(dev->descriptor)); | |
9fcd5c32 AM |
140 | le16_to_cpus(&temp_desc.bcdUSB); |
141 | le16_to_cpus(&temp_desc.idVendor); | |
142 | le16_to_cpus(&temp_desc.idProduct); | |
143 | le16_to_cpus(&temp_desc.bcdDevice); | |
1da177e4 LT |
144 | |
145 | len = sizeof(struct usb_device_descriptor) - pos; | |
146 | if (len > nbytes) | |
147 | len = nbytes; | |
8781ba0a | 148 | if (copy_to_user(buf, ((char *)&temp_desc) + pos, len)) { |
1da177e4 LT |
149 | ret = -EFAULT; |
150 | goto err; | |
151 | } | |
1da177e4 LT |
152 | |
153 | *ppos += len; | |
154 | buf += len; | |
155 | nbytes -= len; | |
156 | ret += len; | |
157 | } | |
158 | ||
159 | pos = sizeof(struct usb_device_descriptor); | |
160 | for (i = 0; nbytes && i < dev->descriptor.bNumConfigurations; i++) { | |
161 | struct usb_config_descriptor *config = | |
162 | (struct usb_config_descriptor *)dev->rawdescriptors[i]; | |
163 | unsigned int length = le16_to_cpu(config->wTotalLength); | |
164 | ||
165 | if (*ppos < pos + length) { | |
166 | ||
167 | /* The descriptor may claim to be longer than it | |
168 | * really is. Here is the actual allocated length. */ | |
169 | unsigned alloclen = | |
170 | le16_to_cpu(dev->config[i].desc.wTotalLength); | |
171 | ||
172 | len = length - (*ppos - pos); | |
173 | if (len > nbytes) | |
174 | len = nbytes; | |
175 | ||
176 | /* Simply don't write (skip over) unallocated parts */ | |
177 | if (alloclen > (*ppos - pos)) { | |
178 | alloclen -= (*ppos - pos); | |
179 | if (copy_to_user(buf, | |
180 | dev->rawdescriptors[i] + (*ppos - pos), | |
181 | min(len, alloclen))) { | |
182 | ret = -EFAULT; | |
183 | goto err; | |
184 | } | |
185 | } | |
186 | ||
187 | *ppos += len; | |
188 | buf += len; | |
189 | nbytes -= len; | |
190 | ret += len; | |
191 | } | |
192 | ||
193 | pos += length; | |
194 | } | |
195 | ||
196 | err: | |
197 | usb_unlock_device(dev); | |
198 | return ret; | |
199 | } | |
200 | ||
201 | /* | |
202 | * async list handling | |
203 | */ | |
204 | ||
205 | static struct async *alloc_async(unsigned int numisoframes) | |
206 | { | |
207 | unsigned int assize = sizeof(struct async) + numisoframes * sizeof(struct usb_iso_packet_descriptor); | |
0a1ef3b5 AS |
208 | struct async *as = kzalloc(assize, GFP_KERNEL); |
209 | ||
1da177e4 LT |
210 | if (!as) |
211 | return NULL; | |
1da177e4 LT |
212 | as->urb = usb_alloc_urb(numisoframes, GFP_KERNEL); |
213 | if (!as->urb) { | |
214 | kfree(as); | |
215 | return NULL; | |
216 | } | |
217 | return as; | |
218 | } | |
219 | ||
220 | static void free_async(struct async *as) | |
221 | { | |
6fd19f4b JJ |
222 | kfree(as->urb->transfer_buffer); |
223 | kfree(as->urb->setup_packet); | |
1da177e4 | 224 | usb_free_urb(as->urb); |
6fd19f4b | 225 | kfree(as); |
1da177e4 LT |
226 | } |
227 | ||
228 | static inline void async_newpending(struct async *as) | |
229 | { | |
230 | struct dev_state *ps = as->ps; | |
231 | unsigned long flags; | |
232 | ||
233 | spin_lock_irqsave(&ps->lock, flags); | |
234 | list_add_tail(&as->asynclist, &ps->async_pending); | |
235 | spin_unlock_irqrestore(&ps->lock, flags); | |
236 | } | |
237 | ||
238 | static inline void async_removepending(struct async *as) | |
239 | { | |
240 | struct dev_state *ps = as->ps; | |
241 | unsigned long flags; | |
242 | ||
243 | spin_lock_irqsave(&ps->lock, flags); | |
244 | list_del_init(&as->asynclist); | |
245 | spin_unlock_irqrestore(&ps->lock, flags); | |
246 | } | |
247 | ||
248 | static inline struct async *async_getcompleted(struct dev_state *ps) | |
249 | { | |
250 | unsigned long flags; | |
251 | struct async *as = NULL; | |
252 | ||
253 | spin_lock_irqsave(&ps->lock, flags); | |
254 | if (!list_empty(&ps->async_completed)) { | |
255 | as = list_entry(ps->async_completed.next, struct async, asynclist); | |
256 | list_del_init(&as->asynclist); | |
257 | } | |
258 | spin_unlock_irqrestore(&ps->lock, flags); | |
259 | return as; | |
260 | } | |
261 | ||
262 | static inline struct async *async_getpending(struct dev_state *ps, void __user *userurb) | |
263 | { | |
264 | unsigned long flags; | |
265 | struct async *as; | |
266 | ||
267 | spin_lock_irqsave(&ps->lock, flags); | |
268 | list_for_each_entry(as, &ps->async_pending, asynclist) | |
269 | if (as->userurb == userurb) { | |
270 | list_del_init(&as->asynclist); | |
271 | spin_unlock_irqrestore(&ps->lock, flags); | |
272 | return as; | |
273 | } | |
274 | spin_unlock_irqrestore(&ps->lock, flags); | |
275 | return NULL; | |
276 | } | |
277 | ||
e639dd3f GKH |
278 | static void snoop_urb(struct urb *urb, void __user *userurb) |
279 | { | |
280 | int j; | |
281 | unsigned char *data = urb->transfer_buffer; | |
282 | ||
283 | if (!usbfs_snoop) | |
284 | return; | |
285 | ||
286 | if (urb->pipe & USB_DIR_IN) | |
287 | dev_info(&urb->dev->dev, "direction=IN\n"); | |
288 | else | |
289 | dev_info(&urb->dev->dev, "direction=OUT\n"); | |
290 | dev_info(&urb->dev->dev, "userurb=%p\n", userurb); | |
291 | dev_info(&urb->dev->dev, "transfer_buffer_length=%d\n", | |
292 | urb->transfer_buffer_length); | |
293 | dev_info(&urb->dev->dev, "actual_length=%d\n", urb->actual_length); | |
294 | dev_info(&urb->dev->dev, "data: "); | |
295 | for (j = 0; j < urb->transfer_buffer_length; ++j) | |
296 | printk ("%02x ", data[j]); | |
297 | printk("\n"); | |
298 | } | |
299 | ||
1da177e4 LT |
300 | static void async_completed(struct urb *urb, struct pt_regs *regs) |
301 | { | |
302 | struct async *as = (struct async *)urb->context; | |
303 | struct dev_state *ps = as->ps; | |
304 | struct siginfo sinfo; | |
305 | ||
306 | spin_lock(&ps->lock); | |
307 | list_move_tail(&as->asynclist, &ps->async_completed); | |
308 | spin_unlock(&ps->lock); | |
309 | if (as->signr) { | |
310 | sinfo.si_signo = as->signr; | |
311 | sinfo.si_errno = as->urb->status; | |
312 | sinfo.si_code = SI_ASYNCIO; | |
313 | sinfo.si_addr = as->userurb; | |
46113830 HW |
314 | kill_proc_info_as_uid(as->signr, &sinfo, as->pid, as->uid, |
315 | as->euid); | |
1da177e4 | 316 | } |
e639dd3f GKH |
317 | snoop(&urb->dev->dev, "urb complete\n"); |
318 | snoop_urb(urb, as->userurb); | |
319 | wake_up(&ps->wait); | |
1da177e4 LT |
320 | } |
321 | ||
322 | static void destroy_async (struct dev_state *ps, struct list_head *list) | |
323 | { | |
324 | struct async *as; | |
325 | unsigned long flags; | |
326 | ||
327 | spin_lock_irqsave(&ps->lock, flags); | |
328 | while (!list_empty(list)) { | |
329 | as = list_entry(list->next, struct async, asynclist); | |
330 | list_del_init(&as->asynclist); | |
331 | ||
332 | /* drop the spinlock so the completion handler can run */ | |
333 | spin_unlock_irqrestore(&ps->lock, flags); | |
334 | usb_kill_urb(as->urb); | |
335 | spin_lock_irqsave(&ps->lock, flags); | |
336 | } | |
337 | spin_unlock_irqrestore(&ps->lock, flags); | |
338 | as = async_getcompleted(ps); | |
339 | while (as) { | |
340 | free_async(as); | |
341 | as = async_getcompleted(ps); | |
342 | } | |
343 | } | |
344 | ||
345 | static void destroy_async_on_interface (struct dev_state *ps, unsigned int ifnum) | |
346 | { | |
347 | struct list_head *p, *q, hitlist; | |
348 | unsigned long flags; | |
349 | ||
350 | INIT_LIST_HEAD(&hitlist); | |
351 | spin_lock_irqsave(&ps->lock, flags); | |
352 | list_for_each_safe(p, q, &ps->async_pending) | |
353 | if (ifnum == list_entry(p, struct async, asynclist)->ifnum) | |
354 | list_move_tail(p, &hitlist); | |
355 | spin_unlock_irqrestore(&ps->lock, flags); | |
356 | destroy_async(ps, &hitlist); | |
357 | } | |
358 | ||
359 | static inline void destroy_all_async(struct dev_state *ps) | |
360 | { | |
361 | destroy_async(ps, &ps->async_pending); | |
362 | } | |
363 | ||
364 | /* | |
365 | * interface claims are made only at the request of user level code, | |
366 | * which can also release them (explicitly or by closing files). | |
367 | * they're also undone when devices disconnect. | |
368 | */ | |
369 | ||
370 | static int driver_probe (struct usb_interface *intf, | |
371 | const struct usb_device_id *id) | |
372 | { | |
373 | return -ENODEV; | |
374 | } | |
375 | ||
376 | static void driver_disconnect(struct usb_interface *intf) | |
377 | { | |
378 | struct dev_state *ps = usb_get_intfdata (intf); | |
379 | unsigned int ifnum = intf->altsetting->desc.bInterfaceNumber; | |
380 | ||
381 | if (!ps) | |
382 | return; | |
383 | ||
384 | /* NOTE: this relies on usbcore having canceled and completed | |
385 | * all pending I/O requests; 2.6 does that. | |
386 | */ | |
387 | ||
388 | if (likely(ifnum < 8*sizeof(ps->ifclaimed))) | |
389 | clear_bit(ifnum, &ps->ifclaimed); | |
390 | else | |
391 | warn("interface number %u out of range", ifnum); | |
392 | ||
393 | usb_set_intfdata (intf, NULL); | |
394 | ||
395 | /* force async requests to complete */ | |
396 | destroy_async_on_interface(ps, ifnum); | |
397 | } | |
398 | ||
399 | struct usb_driver usbfs_driver = { | |
1da177e4 LT |
400 | .name = "usbfs", |
401 | .probe = driver_probe, | |
402 | .disconnect = driver_disconnect, | |
403 | }; | |
404 | ||
405 | static int claimintf(struct dev_state *ps, unsigned int ifnum) | |
406 | { | |
407 | struct usb_device *dev = ps->dev; | |
408 | struct usb_interface *intf; | |
409 | int err; | |
410 | ||
411 | if (ifnum >= 8*sizeof(ps->ifclaimed)) | |
412 | return -EINVAL; | |
413 | /* already claimed */ | |
414 | if (test_bit(ifnum, &ps->ifclaimed)) | |
415 | return 0; | |
416 | ||
417 | /* lock against other changes to driver bindings */ | |
418 | down_write(&usb_bus_type.subsys.rwsem); | |
419 | intf = usb_ifnum_to_if(dev, ifnum); | |
420 | if (!intf) | |
421 | err = -ENOENT; | |
422 | else | |
423 | err = usb_driver_claim_interface(&usbfs_driver, intf, ps); | |
424 | up_write(&usb_bus_type.subsys.rwsem); | |
425 | if (err == 0) | |
426 | set_bit(ifnum, &ps->ifclaimed); | |
427 | return err; | |
428 | } | |
429 | ||
430 | static int releaseintf(struct dev_state *ps, unsigned int ifnum) | |
431 | { | |
432 | struct usb_device *dev; | |
433 | struct usb_interface *intf; | |
434 | int err; | |
435 | ||
436 | err = -EINVAL; | |
437 | if (ifnum >= 8*sizeof(ps->ifclaimed)) | |
438 | return err; | |
439 | dev = ps->dev; | |
440 | /* lock against other changes to driver bindings */ | |
441 | down_write(&usb_bus_type.subsys.rwsem); | |
442 | intf = usb_ifnum_to_if(dev, ifnum); | |
443 | if (!intf) | |
444 | err = -ENOENT; | |
445 | else if (test_and_clear_bit(ifnum, &ps->ifclaimed)) { | |
446 | usb_driver_release_interface(&usbfs_driver, intf); | |
447 | err = 0; | |
448 | } | |
449 | up_write(&usb_bus_type.subsys.rwsem); | |
450 | return err; | |
451 | } | |
452 | ||
453 | static int checkintf(struct dev_state *ps, unsigned int ifnum) | |
454 | { | |
455 | if (ps->dev->state != USB_STATE_CONFIGURED) | |
456 | return -EHOSTUNREACH; | |
457 | if (ifnum >= 8*sizeof(ps->ifclaimed)) | |
458 | return -EINVAL; | |
459 | if (test_bit(ifnum, &ps->ifclaimed)) | |
460 | return 0; | |
461 | /* if not yet claimed, claim it for the driver */ | |
462 | dev_warn(&ps->dev->dev, "usbfs: process %d (%s) did not claim interface %u before use\n", | |
463 | current->pid, current->comm, ifnum); | |
464 | return claimintf(ps, ifnum); | |
465 | } | |
466 | ||
467 | static int findintfep(struct usb_device *dev, unsigned int ep) | |
468 | { | |
469 | unsigned int i, j, e; | |
470 | struct usb_interface *intf; | |
471 | struct usb_host_interface *alts; | |
472 | struct usb_endpoint_descriptor *endpt; | |
473 | ||
474 | if (ep & ~(USB_DIR_IN|0xf)) | |
475 | return -EINVAL; | |
476 | if (!dev->actconfig) | |
477 | return -ESRCH; | |
478 | for (i = 0; i < dev->actconfig->desc.bNumInterfaces; i++) { | |
479 | intf = dev->actconfig->interface[i]; | |
480 | for (j = 0; j < intf->num_altsetting; j++) { | |
481 | alts = &intf->altsetting[j]; | |
482 | for (e = 0; e < alts->desc.bNumEndpoints; e++) { | |
483 | endpt = &alts->endpoint[e].desc; | |
484 | if (endpt->bEndpointAddress == ep) | |
485 | return alts->desc.bInterfaceNumber; | |
486 | } | |
487 | } | |
488 | } | |
489 | return -ENOENT; | |
490 | } | |
491 | ||
492 | static int check_ctrlrecip(struct dev_state *ps, unsigned int requesttype, unsigned int index) | |
493 | { | |
494 | int ret = 0; | |
495 | ||
24f8b116 HS |
496 | if (ps->dev->state != USB_STATE_ADDRESS |
497 | && ps->dev->state != USB_STATE_CONFIGURED) | |
1da177e4 LT |
498 | return -EHOSTUNREACH; |
499 | if (USB_TYPE_VENDOR == (USB_TYPE_MASK & requesttype)) | |
500 | return 0; | |
501 | ||
502 | index &= 0xff; | |
503 | switch (requesttype & USB_RECIP_MASK) { | |
504 | case USB_RECIP_ENDPOINT: | |
505 | if ((ret = findintfep(ps->dev, index)) >= 0) | |
506 | ret = checkintf(ps, ret); | |
507 | break; | |
508 | ||
509 | case USB_RECIP_INTERFACE: | |
510 | ret = checkintf(ps, index); | |
511 | break; | |
512 | } | |
513 | return ret; | |
514 | } | |
515 | ||
4592bf5a GKH |
516 | static struct usb_device *usbdev_lookup_minor(int minor) |
517 | { | |
c182274f GKH |
518 | struct device *device; |
519 | struct usb_device *udev = NULL; | |
4592bf5a GKH |
520 | |
521 | down(&usb_device_class->sem); | |
c182274f GKH |
522 | list_for_each_entry(device, &usb_device_class->devices, node) { |
523 | if (device->devt == MKDEV(USB_DEVICE_MAJOR, minor)) { | |
524 | udev = device->platform_data; | |
4592bf5a GKH |
525 | break; |
526 | } | |
527 | } | |
528 | up(&usb_device_class->sem); | |
529 | ||
c182274f | 530 | return udev; |
4592bf5a GKH |
531 | }; |
532 | ||
1da177e4 LT |
533 | /* |
534 | * file operations | |
535 | */ | |
536 | static int usbdev_open(struct inode *inode, struct file *file) | |
537 | { | |
fbf82fd2 | 538 | struct usb_device *dev = NULL; |
1da177e4 LT |
539 | struct dev_state *ps; |
540 | int ret; | |
541 | ||
542 | /* | |
543 | * no locking necessary here, as chrdev_open has the kernel lock | |
544 | * (still acquire the kernel lock for safety) | |
545 | */ | |
546 | ret = -ENOMEM; | |
547 | if (!(ps = kmalloc(sizeof(struct dev_state), GFP_KERNEL))) | |
548 | goto out_nolock; | |
549 | ||
550 | lock_kernel(); | |
551 | ret = -ENOENT; | |
fbf82fd2 KS |
552 | /* check if we are called from a real node or usbfs */ |
553 | if (imajor(inode) == USB_DEVICE_MAJOR) | |
554 | dev = usbdev_lookup_minor(iminor(inode)); | |
555 | if (!dev) | |
556 | dev = inode->u.generic_ip; | |
1da177e4 LT |
557 | if (!dev) { |
558 | kfree(ps); | |
559 | goto out; | |
560 | } | |
fbf82fd2 | 561 | usb_get_dev(dev); |
1da177e4 LT |
562 | ret = 0; |
563 | ps->dev = dev; | |
564 | ps->file = file; | |
565 | spin_lock_init(&ps->lock); | |
566 | INIT_LIST_HEAD(&ps->async_pending); | |
567 | INIT_LIST_HEAD(&ps->async_completed); | |
568 | init_waitqueue_head(&ps->wait); | |
569 | ps->discsignr = 0; | |
d7dd8a72 LT |
570 | ps->disc_pid = current->pid; |
571 | ps->disc_uid = current->uid; | |
572 | ps->disc_euid = current->euid; | |
1da177e4 LT |
573 | ps->disccontext = NULL; |
574 | ps->ifclaimed = 0; | |
575 | wmb(); | |
576 | list_add_tail(&ps->list, &dev->filelist); | |
577 | file->private_data = ps; | |
578 | out: | |
579 | unlock_kernel(); | |
580 | out_nolock: | |
581 | return ret; | |
582 | } | |
583 | ||
584 | static int usbdev_release(struct inode *inode, struct file *file) | |
585 | { | |
586 | struct dev_state *ps = (struct dev_state *)file->private_data; | |
587 | struct usb_device *dev = ps->dev; | |
588 | unsigned int ifnum; | |
589 | ||
590 | usb_lock_device(dev); | |
591 | list_del_init(&ps->list); | |
592 | for (ifnum = 0; ps->ifclaimed && ifnum < 8*sizeof(ps->ifclaimed); | |
593 | ifnum++) { | |
594 | if (test_bit(ifnum, &ps->ifclaimed)) | |
595 | releaseintf(ps, ifnum); | |
596 | } | |
597 | destroy_all_async(ps); | |
598 | usb_unlock_device(dev); | |
599 | usb_put_dev(dev); | |
600 | ps->dev = NULL; | |
601 | kfree(ps); | |
602 | return 0; | |
603 | } | |
604 | ||
605 | static int proc_control(struct dev_state *ps, void __user *arg) | |
606 | { | |
607 | struct usb_device *dev = ps->dev; | |
608 | struct usbdevfs_ctrltransfer ctrl; | |
609 | unsigned int tmo; | |
610 | unsigned char *tbuf; | |
611 | int i, j, ret; | |
612 | ||
613 | if (copy_from_user(&ctrl, arg, sizeof(ctrl))) | |
614 | return -EFAULT; | |
615 | if ((ret = check_ctrlrecip(ps, ctrl.bRequestType, ctrl.wIndex))) | |
616 | return ret; | |
617 | if (ctrl.wLength > PAGE_SIZE) | |
618 | return -EINVAL; | |
619 | if (!(tbuf = (unsigned char *)__get_free_page(GFP_KERNEL))) | |
620 | return -ENOMEM; | |
621 | tmo = ctrl.timeout; | |
622 | if (ctrl.bRequestType & 0x80) { | |
623 | if (ctrl.wLength && !access_ok(VERIFY_WRITE, ctrl.data, ctrl.wLength)) { | |
624 | free_page((unsigned long)tbuf); | |
625 | return -EINVAL; | |
626 | } | |
fe0410c7 AS |
627 | snoop(&dev->dev, "control read: bRequest=%02x " |
628 | "bRrequestType=%02x wValue=%04x " | |
629 | "wIndex=%04x wLength=%04x\n", | |
630 | ctrl.bRequest, ctrl.bRequestType, ctrl.wValue, | |
631 | ctrl.wIndex, ctrl.wLength); | |
1da177e4 LT |
632 | |
633 | usb_unlock_device(dev); | |
634 | i = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), ctrl.bRequest, ctrl.bRequestType, | |
635 | ctrl.wValue, ctrl.wIndex, tbuf, ctrl.wLength, tmo); | |
636 | usb_lock_device(dev); | |
637 | if ((i > 0) && ctrl.wLength) { | |
638 | if (usbfs_snoop) { | |
639 | dev_info(&dev->dev, "control read: data "); | |
fe0410c7 | 640 | for (j = 0; j < i; ++j) |
e639dd3f | 641 | printk("%02x ", (unsigned char)(tbuf)[j]); |
1da177e4 LT |
642 | printk("\n"); |
643 | } | |
fe0410c7 | 644 | if (copy_to_user(ctrl.data, tbuf, i)) { |
1da177e4 LT |
645 | free_page((unsigned long)tbuf); |
646 | return -EFAULT; | |
647 | } | |
648 | } | |
649 | } else { | |
650 | if (ctrl.wLength) { | |
651 | if (copy_from_user(tbuf, ctrl.data, ctrl.wLength)) { | |
652 | free_page((unsigned long)tbuf); | |
653 | return -EFAULT; | |
654 | } | |
655 | } | |
fe0410c7 AS |
656 | snoop(&dev->dev, "control write: bRequest=%02x " |
657 | "bRrequestType=%02x wValue=%04x " | |
658 | "wIndex=%04x wLength=%04x\n", | |
659 | ctrl.bRequest, ctrl.bRequestType, ctrl.wValue, | |
660 | ctrl.wIndex, ctrl.wLength); | |
1da177e4 LT |
661 | if (usbfs_snoop) { |
662 | dev_info(&dev->dev, "control write: data: "); | |
663 | for (j = 0; j < ctrl.wLength; ++j) | |
e639dd3f | 664 | printk("%02x ", (unsigned char)(tbuf)[j]); |
1da177e4 LT |
665 | printk("\n"); |
666 | } | |
667 | usb_unlock_device(dev); | |
668 | i = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), ctrl.bRequest, ctrl.bRequestType, | |
669 | ctrl.wValue, ctrl.wIndex, tbuf, ctrl.wLength, tmo); | |
670 | usb_lock_device(dev); | |
671 | } | |
672 | free_page((unsigned long)tbuf); | |
673 | if (i<0 && i != -EPIPE) { | |
674 | dev_printk(KERN_DEBUG, &dev->dev, "usbfs: USBDEVFS_CONTROL " | |
675 | "failed cmd %s rqt %u rq %u len %u ret %d\n", | |
676 | current->comm, ctrl.bRequestType, ctrl.bRequest, | |
677 | ctrl.wLength, i); | |
678 | } | |
679 | return i; | |
680 | } | |
681 | ||
682 | static int proc_bulk(struct dev_state *ps, void __user *arg) | |
683 | { | |
684 | struct usb_device *dev = ps->dev; | |
685 | struct usbdevfs_bulktransfer bulk; | |
686 | unsigned int tmo, len1, pipe; | |
687 | int len2; | |
688 | unsigned char *tbuf; | |
e639dd3f | 689 | int i, j, ret; |
1da177e4 LT |
690 | |
691 | if (copy_from_user(&bulk, arg, sizeof(bulk))) | |
692 | return -EFAULT; | |
693 | if ((ret = findintfep(ps->dev, bulk.ep)) < 0) | |
694 | return ret; | |
695 | if ((ret = checkintf(ps, ret))) | |
696 | return ret; | |
697 | if (bulk.ep & USB_DIR_IN) | |
698 | pipe = usb_rcvbulkpipe(dev, bulk.ep & 0x7f); | |
699 | else | |
700 | pipe = usb_sndbulkpipe(dev, bulk.ep & 0x7f); | |
701 | if (!usb_maxpacket(dev, pipe, !(bulk.ep & USB_DIR_IN))) | |
702 | return -EINVAL; | |
703 | len1 = bulk.len; | |
704 | if (len1 > MAX_USBFS_BUFFER_SIZE) | |
705 | return -EINVAL; | |
706 | if (!(tbuf = kmalloc(len1, GFP_KERNEL))) | |
707 | return -ENOMEM; | |
708 | tmo = bulk.timeout; | |
709 | if (bulk.ep & 0x80) { | |
710 | if (len1 && !access_ok(VERIFY_WRITE, bulk.data, len1)) { | |
711 | kfree(tbuf); | |
712 | return -EINVAL; | |
713 | } | |
e639dd3f GKH |
714 | snoop(&dev->dev, "bulk read: len=0x%02x timeout=%04d\n", |
715 | bulk.len, bulk.timeout); | |
1da177e4 LT |
716 | usb_unlock_device(dev); |
717 | i = usb_bulk_msg(dev, pipe, tbuf, len1, &len2, tmo); | |
718 | usb_lock_device(dev); | |
719 | if (!i && len2) { | |
e639dd3f GKH |
720 | if (usbfs_snoop) { |
721 | dev_info(&dev->dev, "bulk read: data "); | |
722 | for (j = 0; j < len2; ++j) | |
723 | printk("%02x ", (unsigned char)(tbuf)[j]); | |
724 | printk("\n"); | |
725 | } | |
1da177e4 LT |
726 | if (copy_to_user(bulk.data, tbuf, len2)) { |
727 | kfree(tbuf); | |
728 | return -EFAULT; | |
729 | } | |
730 | } | |
731 | } else { | |
732 | if (len1) { | |
733 | if (copy_from_user(tbuf, bulk.data, len1)) { | |
734 | kfree(tbuf); | |
735 | return -EFAULT; | |
736 | } | |
737 | } | |
e639dd3f GKH |
738 | snoop(&dev->dev, "bulk write: len=0x%02x timeout=%04d\n", |
739 | bulk.len, bulk.timeout); | |
740 | if (usbfs_snoop) { | |
741 | dev_info(&dev->dev, "bulk write: data: "); | |
742 | for (j = 0; j < len1; ++j) | |
743 | printk("%02x ", (unsigned char)(tbuf)[j]); | |
744 | printk("\n"); | |
745 | } | |
1da177e4 LT |
746 | usb_unlock_device(dev); |
747 | i = usb_bulk_msg(dev, pipe, tbuf, len1, &len2, tmo); | |
748 | usb_lock_device(dev); | |
749 | } | |
750 | kfree(tbuf); | |
751 | if (i < 0) | |
752 | return i; | |
753 | return len2; | |
754 | } | |
755 | ||
756 | static int proc_resetep(struct dev_state *ps, void __user *arg) | |
757 | { | |
758 | unsigned int ep; | |
759 | int ret; | |
760 | ||
761 | if (get_user(ep, (unsigned int __user *)arg)) | |
762 | return -EFAULT; | |
763 | if ((ret = findintfep(ps->dev, ep)) < 0) | |
764 | return ret; | |
765 | if ((ret = checkintf(ps, ret))) | |
766 | return ret; | |
767 | usb_settoggle(ps->dev, ep & 0xf, !(ep & USB_DIR_IN), 0); | |
768 | return 0; | |
769 | } | |
770 | ||
771 | static int proc_clearhalt(struct dev_state *ps, void __user *arg) | |
772 | { | |
773 | unsigned int ep; | |
774 | int pipe; | |
775 | int ret; | |
776 | ||
777 | if (get_user(ep, (unsigned int __user *)arg)) | |
778 | return -EFAULT; | |
779 | if ((ret = findintfep(ps->dev, ep)) < 0) | |
780 | return ret; | |
781 | if ((ret = checkintf(ps, ret))) | |
782 | return ret; | |
783 | if (ep & USB_DIR_IN) | |
784 | pipe = usb_rcvbulkpipe(ps->dev, ep & 0x7f); | |
785 | else | |
786 | pipe = usb_sndbulkpipe(ps->dev, ep & 0x7f); | |
787 | ||
788 | return usb_clear_halt(ps->dev, pipe); | |
789 | } | |
790 | ||
791 | ||
792 | static int proc_getdriver(struct dev_state *ps, void __user *arg) | |
793 | { | |
794 | struct usbdevfs_getdriver gd; | |
795 | struct usb_interface *intf; | |
796 | int ret; | |
797 | ||
798 | if (copy_from_user(&gd, arg, sizeof(gd))) | |
799 | return -EFAULT; | |
800 | down_read(&usb_bus_type.subsys.rwsem); | |
801 | intf = usb_ifnum_to_if(ps->dev, gd.interface); | |
802 | if (!intf || !intf->dev.driver) | |
803 | ret = -ENODATA; | |
804 | else { | |
805 | strncpy(gd.driver, intf->dev.driver->name, | |
806 | sizeof(gd.driver)); | |
807 | ret = (copy_to_user(arg, &gd, sizeof(gd)) ? -EFAULT : 0); | |
808 | } | |
809 | up_read(&usb_bus_type.subsys.rwsem); | |
810 | return ret; | |
811 | } | |
812 | ||
813 | static int proc_connectinfo(struct dev_state *ps, void __user *arg) | |
814 | { | |
815 | struct usbdevfs_connectinfo ci; | |
816 | ||
817 | ci.devnum = ps->dev->devnum; | |
818 | ci.slow = ps->dev->speed == USB_SPEED_LOW; | |
819 | if (copy_to_user(arg, &ci, sizeof(ci))) | |
820 | return -EFAULT; | |
821 | return 0; | |
822 | } | |
823 | ||
824 | static int proc_resetdevice(struct dev_state *ps) | |
825 | { | |
79efa097 | 826 | return usb_reset_composite_device(ps->dev, NULL); |
1da177e4 LT |
827 | } |
828 | ||
829 | static int proc_setintf(struct dev_state *ps, void __user *arg) | |
830 | { | |
831 | struct usbdevfs_setinterface setintf; | |
832 | int ret; | |
833 | ||
834 | if (copy_from_user(&setintf, arg, sizeof(setintf))) | |
835 | return -EFAULT; | |
836 | if ((ret = checkintf(ps, setintf.interface))) | |
837 | return ret; | |
838 | return usb_set_interface(ps->dev, setintf.interface, | |
839 | setintf.altsetting); | |
840 | } | |
841 | ||
842 | static int proc_setconfig(struct dev_state *ps, void __user *arg) | |
843 | { | |
844 | unsigned int u; | |
845 | int status = 0; | |
846 | struct usb_host_config *actconfig; | |
847 | ||
848 | if (get_user(u, (unsigned int __user *)arg)) | |
849 | return -EFAULT; | |
850 | ||
851 | actconfig = ps->dev->actconfig; | |
852 | ||
853 | /* Don't touch the device if any interfaces are claimed. | |
854 | * It could interfere with other drivers' operations, and if | |
855 | * an interface is claimed by usbfs it could easily deadlock. | |
856 | */ | |
857 | if (actconfig) { | |
858 | int i; | |
859 | ||
860 | for (i = 0; i < actconfig->desc.bNumInterfaces; ++i) { | |
861 | if (usb_interface_claimed(actconfig->interface[i])) { | |
862 | dev_warn (&ps->dev->dev, | |
72ebddb5 | 863 | "usbfs: interface %d claimed by %s " |
1da177e4 LT |
864 | "while '%s' sets config #%d\n", |
865 | actconfig->interface[i] | |
866 | ->cur_altsetting | |
867 | ->desc.bInterfaceNumber, | |
72ebddb5 DB |
868 | actconfig->interface[i] |
869 | ->dev.driver->name, | |
1da177e4 | 870 | current->comm, u); |
1da177e4 LT |
871 | status = -EBUSY; |
872 | break; | |
1da177e4 LT |
873 | } |
874 | } | |
875 | } | |
876 | ||
877 | /* SET_CONFIGURATION is often abused as a "cheap" driver reset, | |
878 | * so avoid usb_set_configuration()'s kick to sysfs | |
879 | */ | |
880 | if (status == 0) { | |
881 | if (actconfig && actconfig->desc.bConfigurationValue == u) | |
882 | status = usb_reset_configuration(ps->dev); | |
883 | else | |
884 | status = usb_set_configuration(ps->dev, u); | |
885 | } | |
886 | ||
887 | return status; | |
888 | } | |
889 | ||
1da177e4 LT |
890 | static int proc_do_submiturb(struct dev_state *ps, struct usbdevfs_urb *uurb, |
891 | struct usbdevfs_iso_packet_desc __user *iso_frame_desc, | |
892 | void __user *arg) | |
893 | { | |
894 | struct usbdevfs_iso_packet_desc *isopkt = NULL; | |
895 | struct usb_host_endpoint *ep; | |
896 | struct async *as; | |
897 | struct usb_ctrlrequest *dr = NULL; | |
898 | unsigned int u, totlen, isofrmlen; | |
899 | int ret, interval = 0, ifnum = -1; | |
900 | ||
901 | if (uurb->flags & ~(USBDEVFS_URB_ISO_ASAP|USBDEVFS_URB_SHORT_NOT_OK| | |
902 | URB_NO_FSBR|URB_ZERO_PACKET)) | |
903 | return -EINVAL; | |
904 | if (!uurb->buffer) | |
905 | return -EINVAL; | |
906 | if (uurb->signr != 0 && (uurb->signr < SIGRTMIN || uurb->signr > SIGRTMAX)) | |
907 | return -EINVAL; | |
908 | if (!(uurb->type == USBDEVFS_URB_TYPE_CONTROL && (uurb->endpoint & ~USB_ENDPOINT_DIR_MASK) == 0)) { | |
909 | if ((ifnum = findintfep(ps->dev, uurb->endpoint)) < 0) | |
910 | return ifnum; | |
911 | if ((ret = checkintf(ps, ifnum))) | |
912 | return ret; | |
913 | } | |
914 | if ((uurb->endpoint & USB_ENDPOINT_DIR_MASK) != 0) | |
915 | ep = ps->dev->ep_in [uurb->endpoint & USB_ENDPOINT_NUMBER_MASK]; | |
916 | else | |
917 | ep = ps->dev->ep_out [uurb->endpoint & USB_ENDPOINT_NUMBER_MASK]; | |
918 | if (!ep) | |
919 | return -ENOENT; | |
920 | switch(uurb->type) { | |
921 | case USBDEVFS_URB_TYPE_CONTROL: | |
922 | if ((ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) | |
923 | != USB_ENDPOINT_XFER_CONTROL) | |
924 | return -EINVAL; | |
e016683d MD |
925 | /* min 8 byte setup packet, max 8 byte setup plus an arbitrary data stage */ |
926 | if (uurb->buffer_length < 8 || uurb->buffer_length > (8 + MAX_USBFS_BUFFER_SIZE)) | |
1da177e4 LT |
927 | return -EINVAL; |
928 | if (!(dr = kmalloc(sizeof(struct usb_ctrlrequest), GFP_KERNEL))) | |
929 | return -ENOMEM; | |
930 | if (copy_from_user(dr, uurb->buffer, 8)) { | |
931 | kfree(dr); | |
932 | return -EFAULT; | |
933 | } | |
934 | if (uurb->buffer_length < (le16_to_cpup(&dr->wLength) + 8)) { | |
935 | kfree(dr); | |
936 | return -EINVAL; | |
937 | } | |
938 | if ((ret = check_ctrlrecip(ps, dr->bRequestType, le16_to_cpup(&dr->wIndex)))) { | |
939 | kfree(dr); | |
940 | return ret; | |
941 | } | |
942 | uurb->endpoint = (uurb->endpoint & ~USB_ENDPOINT_DIR_MASK) | (dr->bRequestType & USB_ENDPOINT_DIR_MASK); | |
943 | uurb->number_of_packets = 0; | |
944 | uurb->buffer_length = le16_to_cpup(&dr->wLength); | |
945 | uurb->buffer += 8; | |
946 | if (!access_ok((uurb->endpoint & USB_DIR_IN) ? VERIFY_WRITE : VERIFY_READ, uurb->buffer, uurb->buffer_length)) { | |
947 | kfree(dr); | |
948 | return -EFAULT; | |
949 | } | |
e639dd3f | 950 | snoop(&ps->dev->dev, "control urb\n"); |
1da177e4 LT |
951 | break; |
952 | ||
953 | case USBDEVFS_URB_TYPE_BULK: | |
954 | switch (ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) { | |
955 | case USB_ENDPOINT_XFER_CONTROL: | |
956 | case USB_ENDPOINT_XFER_ISOC: | |
957 | return -EINVAL; | |
958 | /* allow single-shot interrupt transfers, at bogus rates */ | |
959 | } | |
960 | uurb->number_of_packets = 0; | |
961 | if (uurb->buffer_length > MAX_USBFS_BUFFER_SIZE) | |
962 | return -EINVAL; | |
963 | if (!access_ok((uurb->endpoint & USB_DIR_IN) ? VERIFY_WRITE : VERIFY_READ, uurb->buffer, uurb->buffer_length)) | |
964 | return -EFAULT; | |
e639dd3f | 965 | snoop(&ps->dev->dev, "bulk urb\n"); |
1da177e4 LT |
966 | break; |
967 | ||
968 | case USBDEVFS_URB_TYPE_ISO: | |
969 | /* arbitrary limit */ | |
970 | if (uurb->number_of_packets < 1 || uurb->number_of_packets > 128) | |
971 | return -EINVAL; | |
972 | if ((ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) | |
973 | != USB_ENDPOINT_XFER_ISOC) | |
974 | return -EINVAL; | |
975 | interval = 1 << min (15, ep->desc.bInterval - 1); | |
976 | isofrmlen = sizeof(struct usbdevfs_iso_packet_desc) * uurb->number_of_packets; | |
977 | if (!(isopkt = kmalloc(isofrmlen, GFP_KERNEL))) | |
978 | return -ENOMEM; | |
979 | if (copy_from_user(isopkt, iso_frame_desc, isofrmlen)) { | |
980 | kfree(isopkt); | |
981 | return -EFAULT; | |
982 | } | |
983 | for (totlen = u = 0; u < uurb->number_of_packets; u++) { | |
3612242e MD |
984 | /* arbitrary limit, sufficient for USB 2.0 high-bandwidth iso */ |
985 | if (isopkt[u].length > 8192) { | |
1da177e4 LT |
986 | kfree(isopkt); |
987 | return -EINVAL; | |
988 | } | |
989 | totlen += isopkt[u].length; | |
990 | } | |
991 | if (totlen > 32768) { | |
992 | kfree(isopkt); | |
993 | return -EINVAL; | |
994 | } | |
995 | uurb->buffer_length = totlen; | |
e639dd3f | 996 | snoop(&ps->dev->dev, "iso urb\n"); |
1da177e4 LT |
997 | break; |
998 | ||
999 | case USBDEVFS_URB_TYPE_INTERRUPT: | |
1000 | uurb->number_of_packets = 0; | |
1001 | if ((ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) | |
1002 | != USB_ENDPOINT_XFER_INT) | |
1003 | return -EINVAL; | |
1004 | if (ps->dev->speed == USB_SPEED_HIGH) | |
1005 | interval = 1 << min (15, ep->desc.bInterval - 1); | |
1006 | else | |
1007 | interval = ep->desc.bInterval; | |
1008 | if (uurb->buffer_length > MAX_USBFS_BUFFER_SIZE) | |
1009 | return -EINVAL; | |
1010 | if (!access_ok((uurb->endpoint & USB_DIR_IN) ? VERIFY_WRITE : VERIFY_READ, uurb->buffer, uurb->buffer_length)) | |
1011 | return -EFAULT; | |
e639dd3f | 1012 | snoop(&ps->dev->dev, "interrupt urb\n"); |
1da177e4 LT |
1013 | break; |
1014 | ||
1015 | default: | |
1016 | return -EINVAL; | |
1017 | } | |
1018 | if (!(as = alloc_async(uurb->number_of_packets))) { | |
6fd19f4b JJ |
1019 | kfree(isopkt); |
1020 | kfree(dr); | |
1da177e4 LT |
1021 | return -ENOMEM; |
1022 | } | |
1023 | if (!(as->urb->transfer_buffer = kmalloc(uurb->buffer_length, GFP_KERNEL))) { | |
6fd19f4b JJ |
1024 | kfree(isopkt); |
1025 | kfree(dr); | |
1da177e4 LT |
1026 | free_async(as); |
1027 | return -ENOMEM; | |
1028 | } | |
1029 | as->urb->dev = ps->dev; | |
1030 | as->urb->pipe = (uurb->type << 30) | __create_pipe(ps->dev, uurb->endpoint & 0xf) | (uurb->endpoint & USB_DIR_IN); | |
1031 | as->urb->transfer_flags = uurb->flags; | |
1032 | as->urb->transfer_buffer_length = uurb->buffer_length; | |
1033 | as->urb->setup_packet = (unsigned char*)dr; | |
1034 | as->urb->start_frame = uurb->start_frame; | |
1035 | as->urb->number_of_packets = uurb->number_of_packets; | |
1036 | as->urb->interval = interval; | |
1037 | as->urb->context = as; | |
1038 | as->urb->complete = async_completed; | |
1039 | for (totlen = u = 0; u < uurb->number_of_packets; u++) { | |
1040 | as->urb->iso_frame_desc[u].offset = totlen; | |
1041 | as->urb->iso_frame_desc[u].length = isopkt[u].length; | |
1042 | totlen += isopkt[u].length; | |
1043 | } | |
6fd19f4b | 1044 | kfree(isopkt); |
1da177e4 LT |
1045 | as->ps = ps; |
1046 | as->userurb = arg; | |
1047 | if (uurb->endpoint & USB_DIR_IN) | |
1048 | as->userbuffer = uurb->buffer; | |
1049 | else | |
1050 | as->userbuffer = NULL; | |
1051 | as->signr = uurb->signr; | |
1052 | as->ifnum = ifnum; | |
46113830 HW |
1053 | as->pid = current->pid; |
1054 | as->uid = current->uid; | |
1055 | as->euid = current->euid; | |
1da177e4 LT |
1056 | if (!(uurb->endpoint & USB_DIR_IN)) { |
1057 | if (copy_from_user(as->urb->transfer_buffer, uurb->buffer, as->urb->transfer_buffer_length)) { | |
1058 | free_async(as); | |
1059 | return -EFAULT; | |
1060 | } | |
1061 | } | |
e639dd3f GKH |
1062 | snoop(&as->urb->dev->dev, "submit urb\n"); |
1063 | snoop_urb(as->urb, as->userurb); | |
1da177e4 LT |
1064 | async_newpending(as); |
1065 | if ((ret = usb_submit_urb(as->urb, GFP_KERNEL))) { | |
1066 | dev_printk(KERN_DEBUG, &ps->dev->dev, "usbfs: usb_submit_urb returned %d\n", ret); | |
1067 | async_removepending(as); | |
1068 | free_async(as); | |
1069 | return ret; | |
1070 | } | |
1071 | return 0; | |
1072 | } | |
1073 | ||
1074 | static int proc_submiturb(struct dev_state *ps, void __user *arg) | |
1075 | { | |
1076 | struct usbdevfs_urb uurb; | |
1077 | ||
1078 | if (copy_from_user(&uurb, arg, sizeof(uurb))) | |
1079 | return -EFAULT; | |
1080 | ||
83626b01 | 1081 | return proc_do_submiturb(ps, &uurb, (((struct usbdevfs_urb __user *)arg)->iso_frame_desc), arg); |
1da177e4 LT |
1082 | } |
1083 | ||
1084 | static int proc_unlinkurb(struct dev_state *ps, void __user *arg) | |
1085 | { | |
1086 | struct async *as; | |
1087 | ||
1088 | as = async_getpending(ps, arg); | |
1089 | if (!as) | |
1090 | return -EINVAL; | |
1091 | usb_kill_urb(as->urb); | |
1092 | return 0; | |
1093 | } | |
1094 | ||
1095 | static int processcompl(struct async *as, void __user * __user *arg) | |
1096 | { | |
1097 | struct urb *urb = as->urb; | |
1098 | struct usbdevfs_urb __user *userurb = as->userurb; | |
1099 | void __user *addr = as->userurb; | |
1100 | unsigned int i; | |
1101 | ||
1102 | if (as->userbuffer) | |
1103 | if (copy_to_user(as->userbuffer, urb->transfer_buffer, urb->transfer_buffer_length)) | |
1104 | return -EFAULT; | |
1105 | if (put_user(urb->status, &userurb->status)) | |
1106 | return -EFAULT; | |
1107 | if (put_user(urb->actual_length, &userurb->actual_length)) | |
1108 | return -EFAULT; | |
1109 | if (put_user(urb->error_count, &userurb->error_count)) | |
1110 | return -EFAULT; | |
1111 | ||
668a9541 CL |
1112 | if (usb_pipeisoc(urb->pipe)) { |
1113 | for (i = 0; i < urb->number_of_packets; i++) { | |
1114 | if (put_user(urb->iso_frame_desc[i].actual_length, | |
1115 | &userurb->iso_frame_desc[i].actual_length)) | |
1116 | return -EFAULT; | |
1117 | if (put_user(urb->iso_frame_desc[i].status, | |
1118 | &userurb->iso_frame_desc[i].status)) | |
1119 | return -EFAULT; | |
1120 | } | |
1da177e4 LT |
1121 | } |
1122 | ||
1123 | free_async(as); | |
1124 | ||
1125 | if (put_user(addr, (void __user * __user *)arg)) | |
1126 | return -EFAULT; | |
1127 | return 0; | |
1128 | } | |
1129 | ||
1130 | static struct async* reap_as(struct dev_state *ps) | |
1131 | { | |
1132 | DECLARE_WAITQUEUE(wait, current); | |
1133 | struct async *as = NULL; | |
1134 | struct usb_device *dev = ps->dev; | |
1135 | ||
1136 | add_wait_queue(&ps->wait, &wait); | |
1137 | for (;;) { | |
1138 | __set_current_state(TASK_INTERRUPTIBLE); | |
1139 | if ((as = async_getcompleted(ps))) | |
1140 | break; | |
1141 | if (signal_pending(current)) | |
1142 | break; | |
1143 | usb_unlock_device(dev); | |
1144 | schedule(); | |
1145 | usb_lock_device(dev); | |
1146 | } | |
1147 | remove_wait_queue(&ps->wait, &wait); | |
1148 | set_current_state(TASK_RUNNING); | |
1149 | return as; | |
1150 | } | |
1151 | ||
1152 | static int proc_reapurb(struct dev_state *ps, void __user *arg) | |
1153 | { | |
1154 | struct async *as = reap_as(ps); | |
1155 | if (as) | |
1156 | return processcompl(as, (void __user * __user *)arg); | |
1157 | if (signal_pending(current)) | |
1158 | return -EINTR; | |
1159 | return -EIO; | |
1160 | } | |
1161 | ||
1162 | static int proc_reapurbnonblock(struct dev_state *ps, void __user *arg) | |
1163 | { | |
1164 | struct async *as; | |
1165 | ||
1166 | if (!(as = async_getcompleted(ps))) | |
1167 | return -EAGAIN; | |
1168 | return processcompl(as, (void __user * __user *)arg); | |
1169 | } | |
1170 | ||
1171 | #ifdef CONFIG_COMPAT | |
1172 | ||
1173 | static int get_urb32(struct usbdevfs_urb *kurb, | |
1174 | struct usbdevfs_urb32 __user *uurb) | |
1175 | { | |
1176 | __u32 uptr; | |
1177 | if (get_user(kurb->type, &uurb->type) || | |
1178 | __get_user(kurb->endpoint, &uurb->endpoint) || | |
1179 | __get_user(kurb->status, &uurb->status) || | |
1180 | __get_user(kurb->flags, &uurb->flags) || | |
1181 | __get_user(kurb->buffer_length, &uurb->buffer_length) || | |
1182 | __get_user(kurb->actual_length, &uurb->actual_length) || | |
1183 | __get_user(kurb->start_frame, &uurb->start_frame) || | |
1184 | __get_user(kurb->number_of_packets, &uurb->number_of_packets) || | |
1185 | __get_user(kurb->error_count, &uurb->error_count) || | |
1186 | __get_user(kurb->signr, &uurb->signr)) | |
1187 | return -EFAULT; | |
1188 | ||
1189 | if (__get_user(uptr, &uurb->buffer)) | |
1190 | return -EFAULT; | |
1191 | kurb->buffer = compat_ptr(uptr); | |
1192 | if (__get_user(uptr, &uurb->buffer)) | |
1193 | return -EFAULT; | |
1194 | kurb->usercontext = compat_ptr(uptr); | |
1195 | ||
1196 | return 0; | |
1197 | } | |
1198 | ||
1199 | static int proc_submiturb_compat(struct dev_state *ps, void __user *arg) | |
1200 | { | |
1201 | struct usbdevfs_urb uurb; | |
1202 | ||
1203 | if (get_urb32(&uurb,(struct usbdevfs_urb32 *)arg)) | |
1204 | return -EFAULT; | |
1205 | ||
83626b01 | 1206 | return proc_do_submiturb(ps, &uurb, ((struct usbdevfs_urb32 __user *)arg)->iso_frame_desc, arg); |
1da177e4 LT |
1207 | } |
1208 | ||
1209 | static int processcompl_compat(struct async *as, void __user * __user *arg) | |
1210 | { | |
1211 | struct urb *urb = as->urb; | |
1212 | struct usbdevfs_urb32 __user *userurb = as->userurb; | |
1213 | void __user *addr = as->userurb; | |
1214 | unsigned int i; | |
1215 | ||
1216 | if (as->userbuffer) | |
1217 | if (copy_to_user(as->userbuffer, urb->transfer_buffer, urb->transfer_buffer_length)) | |
1218 | return -EFAULT; | |
1219 | if (put_user(urb->status, &userurb->status)) | |
1220 | return -EFAULT; | |
1221 | if (put_user(urb->actual_length, &userurb->actual_length)) | |
1222 | return -EFAULT; | |
1223 | if (put_user(urb->error_count, &userurb->error_count)) | |
1224 | return -EFAULT; | |
1225 | ||
668a9541 CL |
1226 | if (usb_pipeisoc(urb->pipe)) { |
1227 | for (i = 0; i < urb->number_of_packets; i++) { | |
1228 | if (put_user(urb->iso_frame_desc[i].actual_length, | |
1229 | &userurb->iso_frame_desc[i].actual_length)) | |
1230 | return -EFAULT; | |
1231 | if (put_user(urb->iso_frame_desc[i].status, | |
1232 | &userurb->iso_frame_desc[i].status)) | |
1233 | return -EFAULT; | |
1234 | } | |
1da177e4 LT |
1235 | } |
1236 | ||
1237 | free_async(as); | |
1238 | if (put_user((u32)(u64)addr, (u32 __user *)arg)) | |
1239 | return -EFAULT; | |
1240 | return 0; | |
1241 | } | |
1242 | ||
1243 | static int proc_reapurb_compat(struct dev_state *ps, void __user *arg) | |
1244 | { | |
1245 | struct async *as = reap_as(ps); | |
1246 | if (as) | |
1247 | return processcompl_compat(as, (void __user * __user *)arg); | |
1248 | if (signal_pending(current)) | |
1249 | return -EINTR; | |
1250 | return -EIO; | |
1251 | } | |
1252 | ||
1253 | static int proc_reapurbnonblock_compat(struct dev_state *ps, void __user *arg) | |
1254 | { | |
1255 | struct async *as; | |
1256 | ||
1da177e4 LT |
1257 | if (!(as = async_getcompleted(ps))) |
1258 | return -EAGAIN; | |
1da177e4 LT |
1259 | return processcompl_compat(as, (void __user * __user *)arg); |
1260 | } | |
1261 | ||
1262 | #endif | |
1263 | ||
1264 | static int proc_disconnectsignal(struct dev_state *ps, void __user *arg) | |
1265 | { | |
1266 | struct usbdevfs_disconnectsignal ds; | |
1267 | ||
1268 | if (copy_from_user(&ds, arg, sizeof(ds))) | |
1269 | return -EFAULT; | |
1270 | if (ds.signr != 0 && (ds.signr < SIGRTMIN || ds.signr > SIGRTMAX)) | |
1271 | return -EINVAL; | |
1272 | ps->discsignr = ds.signr; | |
1273 | ps->disccontext = ds.context; | |
1274 | return 0; | |
1275 | } | |
1276 | ||
1277 | static int proc_claiminterface(struct dev_state *ps, void __user *arg) | |
1278 | { | |
1279 | unsigned int ifnum; | |
1280 | ||
1281 | if (get_user(ifnum, (unsigned int __user *)arg)) | |
1282 | return -EFAULT; | |
1283 | return claimintf(ps, ifnum); | |
1284 | } | |
1285 | ||
1286 | static int proc_releaseinterface(struct dev_state *ps, void __user *arg) | |
1287 | { | |
1288 | unsigned int ifnum; | |
1289 | int ret; | |
1290 | ||
1291 | if (get_user(ifnum, (unsigned int __user *)arg)) | |
1292 | return -EFAULT; | |
1293 | if ((ret = releaseintf(ps, ifnum)) < 0) | |
1294 | return ret; | |
1295 | destroy_async_on_interface (ps, ifnum); | |
1296 | return 0; | |
1297 | } | |
1298 | ||
c36fc889 | 1299 | static int proc_ioctl(struct dev_state *ps, struct usbdevfs_ioctl *ctl) |
1da177e4 | 1300 | { |
1da177e4 LT |
1301 | int size; |
1302 | void *buf = NULL; | |
1303 | int retval = 0; | |
1304 | struct usb_interface *intf = NULL; | |
1305 | struct usb_driver *driver = NULL; | |
1da177e4 | 1306 | |
c36fc889 PZ |
1307 | /* alloc buffer */ |
1308 | if ((size = _IOC_SIZE (ctl->ioctl_code)) > 0) { | |
1da177e4 LT |
1309 | if ((buf = kmalloc (size, GFP_KERNEL)) == NULL) |
1310 | return -ENOMEM; | |
c36fc889 PZ |
1311 | if ((_IOC_DIR(ctl->ioctl_code) & _IOC_WRITE)) { |
1312 | if (copy_from_user (buf, ctl->data, size)) { | |
6fd19f4b | 1313 | kfree(buf); |
1da177e4 LT |
1314 | return -EFAULT; |
1315 | } | |
1316 | } else { | |
1317 | memset (buf, 0, size); | |
1318 | } | |
1319 | } | |
1320 | ||
1321 | if (!connected(ps->dev)) { | |
6fd19f4b | 1322 | kfree(buf); |
1da177e4 LT |
1323 | return -ENODEV; |
1324 | } | |
1325 | ||
1326 | if (ps->dev->state != USB_STATE_CONFIGURED) | |
1327 | retval = -EHOSTUNREACH; | |
c36fc889 | 1328 | else if (!(intf = usb_ifnum_to_if (ps->dev, ctl->ifno))) |
1da177e4 | 1329 | retval = -EINVAL; |
c36fc889 | 1330 | else switch (ctl->ioctl_code) { |
1da177e4 LT |
1331 | |
1332 | /* disconnect kernel driver from interface */ | |
1333 | case USBDEVFS_DISCONNECT: | |
1334 | ||
1da177e4 LT |
1335 | down_write(&usb_bus_type.subsys.rwsem); |
1336 | if (intf->dev.driver) { | |
1337 | driver = to_usb_driver(intf->dev.driver); | |
1338 | dev_dbg (&intf->dev, "disconnect by usbfs\n"); | |
1339 | usb_driver_release_interface(driver, intf); | |
1340 | } else | |
1341 | retval = -ENODATA; | |
1342 | up_write(&usb_bus_type.subsys.rwsem); | |
1343 | break; | |
1344 | ||
1345 | /* let kernel drivers try to (re)bind to the interface */ | |
1346 | case USBDEVFS_CONNECT: | |
1347 | usb_unlock_device(ps->dev); | |
1da177e4 | 1348 | bus_rescan_devices(intf->dev.bus); |
1da177e4 LT |
1349 | usb_lock_device(ps->dev); |
1350 | break; | |
1351 | ||
1352 | /* talk directly to the interface's driver */ | |
1353 | default: | |
1354 | down_read(&usb_bus_type.subsys.rwsem); | |
1355 | if (intf->dev.driver) | |
1356 | driver = to_usb_driver(intf->dev.driver); | |
1357 | if (driver == NULL || driver->ioctl == NULL) { | |
1358 | retval = -ENOTTY; | |
1359 | } else { | |
c36fc889 | 1360 | retval = driver->ioctl (intf, ctl->ioctl_code, buf); |
1da177e4 LT |
1361 | if (retval == -ENOIOCTLCMD) |
1362 | retval = -ENOTTY; | |
1363 | } | |
1364 | up_read(&usb_bus_type.subsys.rwsem); | |
1365 | } | |
1366 | ||
1367 | /* cleanup and return */ | |
1368 | if (retval >= 0 | |
c36fc889 | 1369 | && (_IOC_DIR (ctl->ioctl_code) & _IOC_READ) != 0 |
1da177e4 | 1370 | && size > 0 |
c36fc889 | 1371 | && copy_to_user (ctl->data, buf, size) != 0) |
1da177e4 | 1372 | retval = -EFAULT; |
6fd19f4b JJ |
1373 | |
1374 | kfree(buf); | |
1da177e4 LT |
1375 | return retval; |
1376 | } | |
1377 | ||
c36fc889 PZ |
1378 | static int proc_ioctl_default(struct dev_state *ps, void __user *arg) |
1379 | { | |
1380 | struct usbdevfs_ioctl ctrl; | |
1381 | ||
1382 | if (copy_from_user(&ctrl, arg, sizeof (ctrl))) | |
1383 | return -EFAULT; | |
1384 | return proc_ioctl(ps, &ctrl); | |
1385 | } | |
1386 | ||
1387 | #ifdef CONFIG_COMPAT | |
777da590 | 1388 | static int proc_ioctl_compat(struct dev_state *ps, compat_uptr_t arg) |
c36fc889 PZ |
1389 | { |
1390 | struct usbdevfs_ioctl32 __user *uioc; | |
1391 | struct usbdevfs_ioctl ctrl; | |
1392 | u32 udata; | |
1393 | ||
058120d7 | 1394 | uioc = compat_ptr((long)arg); |
c36fc889 PZ |
1395 | if (get_user(ctrl.ifno, &uioc->ifno) || |
1396 | get_user(ctrl.ioctl_code, &uioc->ioctl_code) || | |
1397 | __get_user(udata, &uioc->data)) | |
1398 | return -EFAULT; | |
1399 | ctrl.data = compat_ptr(udata); | |
1400 | ||
1401 | return proc_ioctl(ps, &ctrl); | |
1402 | } | |
1403 | #endif | |
1404 | ||
1da177e4 LT |
1405 | /* |
1406 | * NOTE: All requests here that have interface numbers as parameters | |
1407 | * are assuming that somehow the configuration has been prevented from | |
1408 | * changing. But there's no mechanism to ensure that... | |
1409 | */ | |
1410 | static int usbdev_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg) | |
1411 | { | |
1412 | struct dev_state *ps = (struct dev_state *)file->private_data; | |
1413 | struct usb_device *dev = ps->dev; | |
1414 | void __user *p = (void __user *)arg; | |
1415 | int ret = -ENOTTY; | |
1416 | ||
1417 | if (!(file->f_mode & FMODE_WRITE)) | |
1418 | return -EPERM; | |
1419 | usb_lock_device(dev); | |
1420 | if (!connected(dev)) { | |
1421 | usb_unlock_device(dev); | |
1422 | return -ENODEV; | |
1423 | } | |
1424 | ||
1425 | switch (cmd) { | |
1426 | case USBDEVFS_CONTROL: | |
1427 | snoop(&dev->dev, "%s: CONTROL\n", __FUNCTION__); | |
1428 | ret = proc_control(ps, p); | |
1429 | if (ret >= 0) | |
1430 | inode->i_mtime = CURRENT_TIME; | |
1431 | break; | |
1432 | ||
1433 | case USBDEVFS_BULK: | |
1434 | snoop(&dev->dev, "%s: BULK\n", __FUNCTION__); | |
1435 | ret = proc_bulk(ps, p); | |
1436 | if (ret >= 0) | |
1437 | inode->i_mtime = CURRENT_TIME; | |
1438 | break; | |
1439 | ||
1440 | case USBDEVFS_RESETEP: | |
1441 | snoop(&dev->dev, "%s: RESETEP\n", __FUNCTION__); | |
1442 | ret = proc_resetep(ps, p); | |
1443 | if (ret >= 0) | |
1444 | inode->i_mtime = CURRENT_TIME; | |
1445 | break; | |
1446 | ||
1447 | case USBDEVFS_RESET: | |
1448 | snoop(&dev->dev, "%s: RESET\n", __FUNCTION__); | |
1449 | ret = proc_resetdevice(ps); | |
1450 | break; | |
1451 | ||
1452 | case USBDEVFS_CLEAR_HALT: | |
1453 | snoop(&dev->dev, "%s: CLEAR_HALT\n", __FUNCTION__); | |
1454 | ret = proc_clearhalt(ps, p); | |
1455 | if (ret >= 0) | |
1456 | inode->i_mtime = CURRENT_TIME; | |
1457 | break; | |
1458 | ||
1459 | case USBDEVFS_GETDRIVER: | |
1460 | snoop(&dev->dev, "%s: GETDRIVER\n", __FUNCTION__); | |
1461 | ret = proc_getdriver(ps, p); | |
1462 | break; | |
1463 | ||
1464 | case USBDEVFS_CONNECTINFO: | |
1465 | snoop(&dev->dev, "%s: CONNECTINFO\n", __FUNCTION__); | |
1466 | ret = proc_connectinfo(ps, p); | |
1467 | break; | |
1468 | ||
1469 | case USBDEVFS_SETINTERFACE: | |
1470 | snoop(&dev->dev, "%s: SETINTERFACE\n", __FUNCTION__); | |
1471 | ret = proc_setintf(ps, p); | |
1472 | break; | |
1473 | ||
1474 | case USBDEVFS_SETCONFIGURATION: | |
1475 | snoop(&dev->dev, "%s: SETCONFIGURATION\n", __FUNCTION__); | |
1476 | ret = proc_setconfig(ps, p); | |
1477 | break; | |
1478 | ||
1479 | case USBDEVFS_SUBMITURB: | |
1480 | snoop(&dev->dev, "%s: SUBMITURB\n", __FUNCTION__); | |
1481 | ret = proc_submiturb(ps, p); | |
1482 | if (ret >= 0) | |
1483 | inode->i_mtime = CURRENT_TIME; | |
1484 | break; | |
1485 | ||
1486 | #ifdef CONFIG_COMPAT | |
1487 | ||
1488 | case USBDEVFS_SUBMITURB32: | |
1489 | snoop(&dev->dev, "%s: SUBMITURB32\n", __FUNCTION__); | |
1490 | ret = proc_submiturb_compat(ps, p); | |
1491 | if (ret >= 0) | |
1492 | inode->i_mtime = CURRENT_TIME; | |
1493 | break; | |
1494 | ||
1495 | case USBDEVFS_REAPURB32: | |
1496 | snoop(&dev->dev, "%s: REAPURB32\n", __FUNCTION__); | |
1497 | ret = proc_reapurb_compat(ps, p); | |
1498 | break; | |
1499 | ||
1500 | case USBDEVFS_REAPURBNDELAY32: | |
1501 | snoop(&dev->dev, "%s: REAPURBDELAY32\n", __FUNCTION__); | |
1502 | ret = proc_reapurbnonblock_compat(ps, p); | |
1503 | break; | |
1504 | ||
c36fc889 PZ |
1505 | case USBDEVFS_IOCTL32: |
1506 | snoop(&dev->dev, "%s: IOCTL\n", __FUNCTION__); | |
777da590 | 1507 | ret = proc_ioctl_compat(ps, (compat_uptr_t)(long)p); |
c36fc889 | 1508 | break; |
1da177e4 LT |
1509 | #endif |
1510 | ||
1511 | case USBDEVFS_DISCARDURB: | |
1512 | snoop(&dev->dev, "%s: DISCARDURB\n", __FUNCTION__); | |
1513 | ret = proc_unlinkurb(ps, p); | |
1514 | break; | |
1515 | ||
1516 | case USBDEVFS_REAPURB: | |
1517 | snoop(&dev->dev, "%s: REAPURB\n", __FUNCTION__); | |
1518 | ret = proc_reapurb(ps, p); | |
1519 | break; | |
1520 | ||
1521 | case USBDEVFS_REAPURBNDELAY: | |
1522 | snoop(&dev->dev, "%s: REAPURBDELAY\n", __FUNCTION__); | |
1523 | ret = proc_reapurbnonblock(ps, p); | |
1524 | break; | |
1525 | ||
1526 | case USBDEVFS_DISCSIGNAL: | |
1527 | snoop(&dev->dev, "%s: DISCSIGNAL\n", __FUNCTION__); | |
1528 | ret = proc_disconnectsignal(ps, p); | |
1529 | break; | |
1530 | ||
1531 | case USBDEVFS_CLAIMINTERFACE: | |
1532 | snoop(&dev->dev, "%s: CLAIMINTERFACE\n", __FUNCTION__); | |
1533 | ret = proc_claiminterface(ps, p); | |
1534 | break; | |
1535 | ||
1536 | case USBDEVFS_RELEASEINTERFACE: | |
1537 | snoop(&dev->dev, "%s: RELEASEINTERFACE\n", __FUNCTION__); | |
1538 | ret = proc_releaseinterface(ps, p); | |
1539 | break; | |
1540 | ||
1541 | case USBDEVFS_IOCTL: | |
1542 | snoop(&dev->dev, "%s: IOCTL\n", __FUNCTION__); | |
c36fc889 | 1543 | ret = proc_ioctl_default(ps, p); |
1da177e4 LT |
1544 | break; |
1545 | } | |
1546 | usb_unlock_device(dev); | |
1547 | if (ret >= 0) | |
1548 | inode->i_atime = CURRENT_TIME; | |
1549 | return ret; | |
1550 | } | |
1551 | ||
1552 | /* No kernel lock - fine */ | |
1553 | static unsigned int usbdev_poll(struct file *file, struct poll_table_struct *wait) | |
1554 | { | |
1555 | struct dev_state *ps = (struct dev_state *)file->private_data; | |
1556 | unsigned int mask = 0; | |
1557 | ||
1558 | poll_wait(file, &ps->wait, wait); | |
1559 | if (file->f_mode & FMODE_WRITE && !list_empty(&ps->async_completed)) | |
1560 | mask |= POLLOUT | POLLWRNORM; | |
1561 | if (!connected(ps->dev)) | |
1562 | mask |= POLLERR | POLLHUP; | |
1563 | return mask; | |
1564 | } | |
1565 | ||
1566 | struct file_operations usbfs_device_file_operations = { | |
1567 | .llseek = usbdev_lseek, | |
1568 | .read = usbdev_read, | |
1569 | .poll = usbdev_poll, | |
1570 | .ioctl = usbdev_ioctl, | |
1571 | .open = usbdev_open, | |
1572 | .release = usbdev_release, | |
1573 | }; | |
fbf82fd2 | 1574 | |
a7b986b3 | 1575 | static void usbdev_add(struct usb_device *dev) |
fbf82fd2 KS |
1576 | { |
1577 | int minor = ((dev->bus->busnum-1) * 128) + (dev->devnum-1); | |
1578 | ||
c182274f GKH |
1579 | dev->usbfs_dev = device_create(usb_device_class, &dev->dev, |
1580 | MKDEV(USB_DEVICE_MAJOR, minor), | |
fbf82fd2 KS |
1581 | "usbdev%d.%d", dev->bus->busnum, dev->devnum); |
1582 | ||
c182274f | 1583 | dev->usbfs_dev->platform_data = dev; |
fbf82fd2 KS |
1584 | } |
1585 | ||
a7b986b3 | 1586 | static void usbdev_remove(struct usb_device *dev) |
fbf82fd2 | 1587 | { |
c182274f | 1588 | device_unregister(dev->usbfs_dev); |
fbf82fd2 KS |
1589 | } |
1590 | ||
a7b986b3 GKH |
1591 | static int usbdev_notify(struct notifier_block *self, unsigned long action, |
1592 | void *dev) | |
1593 | { | |
1594 | switch (action) { | |
1595 | case USB_DEVICE_ADD: | |
1596 | usbdev_add(dev); | |
1597 | break; | |
1598 | case USB_DEVICE_REMOVE: | |
1599 | usbdev_remove(dev); | |
1600 | break; | |
1601 | } | |
1602 | return NOTIFY_OK; | |
1603 | } | |
1604 | ||
1605 | static struct notifier_block usbdev_nb = { | |
1606 | .notifier_call = usbdev_notify, | |
1607 | }; | |
1608 | ||
fbf82fd2 KS |
1609 | static struct cdev usb_device_cdev = { |
1610 | .kobj = {.name = "usb_device", }, | |
1611 | .owner = THIS_MODULE, | |
1612 | }; | |
1613 | ||
1614 | int __init usbdev_init(void) | |
1615 | { | |
1616 | int retval; | |
1617 | ||
fad21bdf AS |
1618 | retval = register_chrdev_region(USB_DEVICE_DEV, USB_DEVICE_MAX, |
1619 | "usb_device"); | |
fbf82fd2 KS |
1620 | if (retval) { |
1621 | err("unable to register minors for usb_device"); | |
1622 | goto out; | |
1623 | } | |
1624 | cdev_init(&usb_device_cdev, &usbfs_device_file_operations); | |
fad21bdf | 1625 | retval = cdev_add(&usb_device_cdev, USB_DEVICE_DEV, USB_DEVICE_MAX); |
fbf82fd2 KS |
1626 | if (retval) { |
1627 | err("unable to get usb_device major %d", USB_DEVICE_MAJOR); | |
a7b986b3 | 1628 | goto error_cdev; |
fbf82fd2 KS |
1629 | } |
1630 | usb_device_class = class_create(THIS_MODULE, "usb_device"); | |
1631 | if (IS_ERR(usb_device_class)) { | |
1632 | err("unable to register usb_device class"); | |
1633 | retval = PTR_ERR(usb_device_class); | |
a7b986b3 | 1634 | goto error_class; |
fbf82fd2 KS |
1635 | } |
1636 | ||
a7b986b3 GKH |
1637 | usb_register_notify(&usbdev_nb); |
1638 | ||
fbf82fd2 KS |
1639 | out: |
1640 | return retval; | |
a7b986b3 GKH |
1641 | |
1642 | error_class: | |
1643 | usb_device_class = NULL; | |
1644 | cdev_del(&usb_device_cdev); | |
1645 | ||
1646 | error_cdev: | |
1647 | unregister_chrdev_region(USB_DEVICE_DEV, USB_DEVICE_MAX); | |
1648 | goto out; | |
fbf82fd2 KS |
1649 | } |
1650 | ||
1651 | void usbdev_cleanup(void) | |
1652 | { | |
a7b986b3 | 1653 | usb_unregister_notify(&usbdev_nb); |
fbf82fd2 KS |
1654 | class_destroy(usb_device_class); |
1655 | cdev_del(&usb_device_cdev); | |
fad21bdf | 1656 | unregister_chrdev_region(USB_DEVICE_DEV, USB_DEVICE_MAX); |
fbf82fd2 KS |
1657 | } |
1658 |