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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 | |
33 | */ | |
34 | ||
35 | /*****************************************************************************/ | |
36 | ||
37 | #include <linux/fs.h> | |
38 | #include <linux/mm.h> | |
39 | #include <linux/slab.h> | |
40 | #include <linux/smp_lock.h> | |
41 | #include <linux/signal.h> | |
42 | #include <linux/poll.h> | |
43 | #include <linux/module.h> | |
44 | #include <linux/usb.h> | |
45 | #include <linux/usbdevice_fs.h> | |
fbf82fd2 | 46 | #include <linux/cdev.h> |
1da177e4 LT |
47 | #include <asm/uaccess.h> |
48 | #include <asm/byteorder.h> | |
49 | #include <linux/moduleparam.h> | |
50 | ||
51 | #include "hcd.h" /* for usbcore internals */ | |
52 | #include "usb.h" | |
53 | ||
fbf82fd2 KS |
54 | #define USB_MAXBUS 64 |
55 | #define USB_DEVICE_MAX USB_MAXBUS * 128 | |
56 | static struct class *usb_device_class; | |
57 | ||
1da177e4 LT |
58 | struct async { |
59 | struct list_head asynclist; | |
60 | struct dev_state *ps; | |
61 | struct task_struct *task; | |
62 | unsigned int signr; | |
63 | unsigned int ifnum; | |
64 | void __user *userbuffer; | |
65 | void __user *userurb; | |
66 | struct urb *urb; | |
67 | }; | |
68 | ||
69 | static int usbfs_snoop = 0; | |
70 | module_param (usbfs_snoop, bool, S_IRUGO | S_IWUSR); | |
71 | MODULE_PARM_DESC (usbfs_snoop, "true to log all usbfs traffic"); | |
72 | ||
73 | #define snoop(dev, format, arg...) \ | |
74 | do { \ | |
75 | if (usbfs_snoop) \ | |
76 | dev_info( dev , format , ## arg); \ | |
77 | } while (0) | |
78 | ||
fad21bdf AS |
79 | #define USB_DEVICE_DEV MKDEV(USB_DEVICE_MAJOR, 0) |
80 | ||
1da177e4 LT |
81 | |
82 | #define MAX_USBFS_BUFFER_SIZE 16384 | |
83 | ||
84 | static inline int connected (struct usb_device *dev) | |
85 | { | |
86 | return dev->state != USB_STATE_NOTATTACHED; | |
87 | } | |
88 | ||
89 | static loff_t usbdev_lseek(struct file *file, loff_t offset, int orig) | |
90 | { | |
91 | loff_t ret; | |
92 | ||
93 | lock_kernel(); | |
94 | ||
95 | switch (orig) { | |
96 | case 0: | |
97 | file->f_pos = offset; | |
98 | ret = file->f_pos; | |
99 | break; | |
100 | case 1: | |
101 | file->f_pos += offset; | |
102 | ret = file->f_pos; | |
103 | break; | |
104 | case 2: | |
105 | default: | |
106 | ret = -EINVAL; | |
107 | } | |
108 | ||
109 | unlock_kernel(); | |
110 | return ret; | |
111 | } | |
112 | ||
113 | static ssize_t usbdev_read(struct file *file, char __user *buf, size_t nbytes, loff_t *ppos) | |
114 | { | |
115 | struct dev_state *ps = (struct dev_state *)file->private_data; | |
116 | struct usb_device *dev = ps->dev; | |
117 | ssize_t ret = 0; | |
118 | unsigned len; | |
119 | loff_t pos; | |
120 | int i; | |
121 | ||
122 | pos = *ppos; | |
123 | usb_lock_device(dev); | |
124 | if (!connected(dev)) { | |
125 | ret = -ENODEV; | |
126 | goto err; | |
127 | } else if (pos < 0) { | |
128 | ret = -EINVAL; | |
129 | goto err; | |
130 | } | |
131 | ||
132 | if (pos < sizeof(struct usb_device_descriptor)) { | |
133 | struct usb_device_descriptor *desc = kmalloc(sizeof(*desc), GFP_KERNEL); | |
134 | if (!desc) { | |
135 | ret = -ENOMEM; | |
136 | goto err; | |
137 | } | |
138 | memcpy(desc, &dev->descriptor, sizeof(dev->descriptor)); | |
139 | le16_to_cpus(&desc->bcdUSB); | |
140 | le16_to_cpus(&desc->idVendor); | |
141 | le16_to_cpus(&desc->idProduct); | |
142 | le16_to_cpus(&desc->bcdDevice); | |
143 | ||
144 | len = sizeof(struct usb_device_descriptor) - pos; | |
145 | if (len > nbytes) | |
146 | len = nbytes; | |
147 | if (copy_to_user(buf, ((char *)desc) + pos, len)) { | |
148 | kfree(desc); | |
149 | ret = -EFAULT; | |
150 | goto err; | |
151 | } | |
152 | kfree(desc); | |
153 | ||
154 | *ppos += len; | |
155 | buf += len; | |
156 | nbytes -= len; | |
157 | ret += len; | |
158 | } | |
159 | ||
160 | pos = sizeof(struct usb_device_descriptor); | |
161 | for (i = 0; nbytes && i < dev->descriptor.bNumConfigurations; i++) { | |
162 | struct usb_config_descriptor *config = | |
163 | (struct usb_config_descriptor *)dev->rawdescriptors[i]; | |
164 | unsigned int length = le16_to_cpu(config->wTotalLength); | |
165 | ||
166 | if (*ppos < pos + length) { | |
167 | ||
168 | /* The descriptor may claim to be longer than it | |
169 | * really is. Here is the actual allocated length. */ | |
170 | unsigned alloclen = | |
171 | le16_to_cpu(dev->config[i].desc.wTotalLength); | |
172 | ||
173 | len = length - (*ppos - pos); | |
174 | if (len > nbytes) | |
175 | len = nbytes; | |
176 | ||
177 | /* Simply don't write (skip over) unallocated parts */ | |
178 | if (alloclen > (*ppos - pos)) { | |
179 | alloclen -= (*ppos - pos); | |
180 | if (copy_to_user(buf, | |
181 | dev->rawdescriptors[i] + (*ppos - pos), | |
182 | min(len, alloclen))) { | |
183 | ret = -EFAULT; | |
184 | goto err; | |
185 | } | |
186 | } | |
187 | ||
188 | *ppos += len; | |
189 | buf += len; | |
190 | nbytes -= len; | |
191 | ret += len; | |
192 | } | |
193 | ||
194 | pos += length; | |
195 | } | |
196 | ||
197 | err: | |
198 | usb_unlock_device(dev); | |
199 | return ret; | |
200 | } | |
201 | ||
202 | /* | |
203 | * async list handling | |
204 | */ | |
205 | ||
206 | static struct async *alloc_async(unsigned int numisoframes) | |
207 | { | |
208 | unsigned int assize = sizeof(struct async) + numisoframes * sizeof(struct usb_iso_packet_descriptor); | |
209 | struct async *as = kmalloc(assize, GFP_KERNEL); | |
210 | if (!as) | |
211 | return NULL; | |
212 | memset(as, 0, assize); | |
213 | as->urb = usb_alloc_urb(numisoframes, GFP_KERNEL); | |
214 | if (!as->urb) { | |
215 | kfree(as); | |
216 | return NULL; | |
217 | } | |
218 | return as; | |
219 | } | |
220 | ||
221 | static void free_async(struct async *as) | |
222 | { | |
6fd19f4b JJ |
223 | kfree(as->urb->transfer_buffer); |
224 | kfree(as->urb->setup_packet); | |
1da177e4 | 225 | usb_free_urb(as->urb); |
6fd19f4b | 226 | kfree(as); |
1da177e4 LT |
227 | } |
228 | ||
229 | static inline void async_newpending(struct async *as) | |
230 | { | |
231 | struct dev_state *ps = as->ps; | |
232 | unsigned long flags; | |
233 | ||
234 | spin_lock_irqsave(&ps->lock, flags); | |
235 | list_add_tail(&as->asynclist, &ps->async_pending); | |
236 | spin_unlock_irqrestore(&ps->lock, flags); | |
237 | } | |
238 | ||
239 | static inline void async_removepending(struct async *as) | |
240 | { | |
241 | struct dev_state *ps = as->ps; | |
242 | unsigned long flags; | |
243 | ||
244 | spin_lock_irqsave(&ps->lock, flags); | |
245 | list_del_init(&as->asynclist); | |
246 | spin_unlock_irqrestore(&ps->lock, flags); | |
247 | } | |
248 | ||
249 | static inline struct async *async_getcompleted(struct dev_state *ps) | |
250 | { | |
251 | unsigned long flags; | |
252 | struct async *as = NULL; | |
253 | ||
254 | spin_lock_irqsave(&ps->lock, flags); | |
255 | if (!list_empty(&ps->async_completed)) { | |
256 | as = list_entry(ps->async_completed.next, struct async, asynclist); | |
257 | list_del_init(&as->asynclist); | |
258 | } | |
259 | spin_unlock_irqrestore(&ps->lock, flags); | |
260 | return as; | |
261 | } | |
262 | ||
263 | static inline struct async *async_getpending(struct dev_state *ps, void __user *userurb) | |
264 | { | |
265 | unsigned long flags; | |
266 | struct async *as; | |
267 | ||
268 | spin_lock_irqsave(&ps->lock, flags); | |
269 | list_for_each_entry(as, &ps->async_pending, asynclist) | |
270 | if (as->userurb == userurb) { | |
271 | list_del_init(&as->asynclist); | |
272 | spin_unlock_irqrestore(&ps->lock, flags); | |
273 | return as; | |
274 | } | |
275 | spin_unlock_irqrestore(&ps->lock, flags); | |
276 | return NULL; | |
277 | } | |
278 | ||
279 | static void async_completed(struct urb *urb, struct pt_regs *regs) | |
280 | { | |
281 | struct async *as = (struct async *)urb->context; | |
282 | struct dev_state *ps = as->ps; | |
283 | struct siginfo sinfo; | |
284 | ||
285 | spin_lock(&ps->lock); | |
286 | list_move_tail(&as->asynclist, &ps->async_completed); | |
287 | spin_unlock(&ps->lock); | |
288 | if (as->signr) { | |
289 | sinfo.si_signo = as->signr; | |
290 | sinfo.si_errno = as->urb->status; | |
291 | sinfo.si_code = SI_ASYNCIO; | |
292 | sinfo.si_addr = as->userurb; | |
293 | send_sig_info(as->signr, &sinfo, as->task); | |
294 | } | |
295 | wake_up(&ps->wait); | |
296 | } | |
297 | ||
298 | static void destroy_async (struct dev_state *ps, struct list_head *list) | |
299 | { | |
300 | struct async *as; | |
301 | unsigned long flags; | |
302 | ||
303 | spin_lock_irqsave(&ps->lock, flags); | |
304 | while (!list_empty(list)) { | |
305 | as = list_entry(list->next, struct async, asynclist); | |
306 | list_del_init(&as->asynclist); | |
307 | ||
308 | /* drop the spinlock so the completion handler can run */ | |
309 | spin_unlock_irqrestore(&ps->lock, flags); | |
310 | usb_kill_urb(as->urb); | |
311 | spin_lock_irqsave(&ps->lock, flags); | |
312 | } | |
313 | spin_unlock_irqrestore(&ps->lock, flags); | |
314 | as = async_getcompleted(ps); | |
315 | while (as) { | |
316 | free_async(as); | |
317 | as = async_getcompleted(ps); | |
318 | } | |
319 | } | |
320 | ||
321 | static void destroy_async_on_interface (struct dev_state *ps, unsigned int ifnum) | |
322 | { | |
323 | struct list_head *p, *q, hitlist; | |
324 | unsigned long flags; | |
325 | ||
326 | INIT_LIST_HEAD(&hitlist); | |
327 | spin_lock_irqsave(&ps->lock, flags); | |
328 | list_for_each_safe(p, q, &ps->async_pending) | |
329 | if (ifnum == list_entry(p, struct async, asynclist)->ifnum) | |
330 | list_move_tail(p, &hitlist); | |
331 | spin_unlock_irqrestore(&ps->lock, flags); | |
332 | destroy_async(ps, &hitlist); | |
333 | } | |
334 | ||
335 | static inline void destroy_all_async(struct dev_state *ps) | |
336 | { | |
337 | destroy_async(ps, &ps->async_pending); | |
338 | } | |
339 | ||
340 | /* | |
341 | * interface claims are made only at the request of user level code, | |
342 | * which can also release them (explicitly or by closing files). | |
343 | * they're also undone when devices disconnect. | |
344 | */ | |
345 | ||
346 | static int driver_probe (struct usb_interface *intf, | |
347 | const struct usb_device_id *id) | |
348 | { | |
349 | return -ENODEV; | |
350 | } | |
351 | ||
352 | static void driver_disconnect(struct usb_interface *intf) | |
353 | { | |
354 | struct dev_state *ps = usb_get_intfdata (intf); | |
355 | unsigned int ifnum = intf->altsetting->desc.bInterfaceNumber; | |
356 | ||
357 | if (!ps) | |
358 | return; | |
359 | ||
360 | /* NOTE: this relies on usbcore having canceled and completed | |
361 | * all pending I/O requests; 2.6 does that. | |
362 | */ | |
363 | ||
364 | if (likely(ifnum < 8*sizeof(ps->ifclaimed))) | |
365 | clear_bit(ifnum, &ps->ifclaimed); | |
366 | else | |
367 | warn("interface number %u out of range", ifnum); | |
368 | ||
369 | usb_set_intfdata (intf, NULL); | |
370 | ||
371 | /* force async requests to complete */ | |
372 | destroy_async_on_interface(ps, ifnum); | |
373 | } | |
374 | ||
375 | struct usb_driver usbfs_driver = { | |
376 | .owner = THIS_MODULE, | |
377 | .name = "usbfs", | |
378 | .probe = driver_probe, | |
379 | .disconnect = driver_disconnect, | |
380 | }; | |
381 | ||
382 | static int claimintf(struct dev_state *ps, unsigned int ifnum) | |
383 | { | |
384 | struct usb_device *dev = ps->dev; | |
385 | struct usb_interface *intf; | |
386 | int err; | |
387 | ||
388 | if (ifnum >= 8*sizeof(ps->ifclaimed)) | |
389 | return -EINVAL; | |
390 | /* already claimed */ | |
391 | if (test_bit(ifnum, &ps->ifclaimed)) | |
392 | return 0; | |
393 | ||
394 | /* lock against other changes to driver bindings */ | |
395 | down_write(&usb_bus_type.subsys.rwsem); | |
396 | intf = usb_ifnum_to_if(dev, ifnum); | |
397 | if (!intf) | |
398 | err = -ENOENT; | |
399 | else | |
400 | err = usb_driver_claim_interface(&usbfs_driver, intf, ps); | |
401 | up_write(&usb_bus_type.subsys.rwsem); | |
402 | if (err == 0) | |
403 | set_bit(ifnum, &ps->ifclaimed); | |
404 | return err; | |
405 | } | |
406 | ||
407 | static int releaseintf(struct dev_state *ps, unsigned int ifnum) | |
408 | { | |
409 | struct usb_device *dev; | |
410 | struct usb_interface *intf; | |
411 | int err; | |
412 | ||
413 | err = -EINVAL; | |
414 | if (ifnum >= 8*sizeof(ps->ifclaimed)) | |
415 | return err; | |
416 | dev = ps->dev; | |
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 if (test_and_clear_bit(ifnum, &ps->ifclaimed)) { | |
423 | usb_driver_release_interface(&usbfs_driver, intf); | |
424 | err = 0; | |
425 | } | |
426 | up_write(&usb_bus_type.subsys.rwsem); | |
427 | return err; | |
428 | } | |
429 | ||
430 | static int checkintf(struct dev_state *ps, unsigned int ifnum) | |
431 | { | |
432 | if (ps->dev->state != USB_STATE_CONFIGURED) | |
433 | return -EHOSTUNREACH; | |
434 | if (ifnum >= 8*sizeof(ps->ifclaimed)) | |
435 | return -EINVAL; | |
436 | if (test_bit(ifnum, &ps->ifclaimed)) | |
437 | return 0; | |
438 | /* if not yet claimed, claim it for the driver */ | |
439 | dev_warn(&ps->dev->dev, "usbfs: process %d (%s) did not claim interface %u before use\n", | |
440 | current->pid, current->comm, ifnum); | |
441 | return claimintf(ps, ifnum); | |
442 | } | |
443 | ||
444 | static int findintfep(struct usb_device *dev, unsigned int ep) | |
445 | { | |
446 | unsigned int i, j, e; | |
447 | struct usb_interface *intf; | |
448 | struct usb_host_interface *alts; | |
449 | struct usb_endpoint_descriptor *endpt; | |
450 | ||
451 | if (ep & ~(USB_DIR_IN|0xf)) | |
452 | return -EINVAL; | |
453 | if (!dev->actconfig) | |
454 | return -ESRCH; | |
455 | for (i = 0; i < dev->actconfig->desc.bNumInterfaces; i++) { | |
456 | intf = dev->actconfig->interface[i]; | |
457 | for (j = 0; j < intf->num_altsetting; j++) { | |
458 | alts = &intf->altsetting[j]; | |
459 | for (e = 0; e < alts->desc.bNumEndpoints; e++) { | |
460 | endpt = &alts->endpoint[e].desc; | |
461 | if (endpt->bEndpointAddress == ep) | |
462 | return alts->desc.bInterfaceNumber; | |
463 | } | |
464 | } | |
465 | } | |
466 | return -ENOENT; | |
467 | } | |
468 | ||
469 | static int check_ctrlrecip(struct dev_state *ps, unsigned int requesttype, unsigned int index) | |
470 | { | |
471 | int ret = 0; | |
472 | ||
473 | if (ps->dev->state != USB_STATE_CONFIGURED) | |
474 | return -EHOSTUNREACH; | |
475 | if (USB_TYPE_VENDOR == (USB_TYPE_MASK & requesttype)) | |
476 | return 0; | |
477 | ||
478 | index &= 0xff; | |
479 | switch (requesttype & USB_RECIP_MASK) { | |
480 | case USB_RECIP_ENDPOINT: | |
481 | if ((ret = findintfep(ps->dev, index)) >= 0) | |
482 | ret = checkintf(ps, ret); | |
483 | break; | |
484 | ||
485 | case USB_RECIP_INTERFACE: | |
486 | ret = checkintf(ps, index); | |
487 | break; | |
488 | } | |
489 | return ret; | |
490 | } | |
491 | ||
492 | /* | |
493 | * file operations | |
494 | */ | |
495 | static int usbdev_open(struct inode *inode, struct file *file) | |
496 | { | |
fbf82fd2 | 497 | struct usb_device *dev = NULL; |
1da177e4 LT |
498 | struct dev_state *ps; |
499 | int ret; | |
500 | ||
501 | /* | |
502 | * no locking necessary here, as chrdev_open has the kernel lock | |
503 | * (still acquire the kernel lock for safety) | |
504 | */ | |
505 | ret = -ENOMEM; | |
506 | if (!(ps = kmalloc(sizeof(struct dev_state), GFP_KERNEL))) | |
507 | goto out_nolock; | |
508 | ||
509 | lock_kernel(); | |
510 | ret = -ENOENT; | |
fbf82fd2 KS |
511 | /* check if we are called from a real node or usbfs */ |
512 | if (imajor(inode) == USB_DEVICE_MAJOR) | |
513 | dev = usbdev_lookup_minor(iminor(inode)); | |
514 | if (!dev) | |
515 | dev = inode->u.generic_ip; | |
1da177e4 LT |
516 | if (!dev) { |
517 | kfree(ps); | |
518 | goto out; | |
519 | } | |
fbf82fd2 | 520 | usb_get_dev(dev); |
1da177e4 LT |
521 | ret = 0; |
522 | ps->dev = dev; | |
523 | ps->file = file; | |
524 | spin_lock_init(&ps->lock); | |
525 | INIT_LIST_HEAD(&ps->async_pending); | |
526 | INIT_LIST_HEAD(&ps->async_completed); | |
527 | init_waitqueue_head(&ps->wait); | |
528 | ps->discsignr = 0; | |
529 | ps->disctask = current; | |
530 | ps->disccontext = NULL; | |
531 | ps->ifclaimed = 0; | |
532 | wmb(); | |
533 | list_add_tail(&ps->list, &dev->filelist); | |
534 | file->private_data = ps; | |
535 | out: | |
536 | unlock_kernel(); | |
537 | out_nolock: | |
538 | return ret; | |
539 | } | |
540 | ||
541 | static int usbdev_release(struct inode *inode, struct file *file) | |
542 | { | |
543 | struct dev_state *ps = (struct dev_state *)file->private_data; | |
544 | struct usb_device *dev = ps->dev; | |
545 | unsigned int ifnum; | |
546 | ||
547 | usb_lock_device(dev); | |
548 | list_del_init(&ps->list); | |
549 | for (ifnum = 0; ps->ifclaimed && ifnum < 8*sizeof(ps->ifclaimed); | |
550 | ifnum++) { | |
551 | if (test_bit(ifnum, &ps->ifclaimed)) | |
552 | releaseintf(ps, ifnum); | |
553 | } | |
554 | destroy_all_async(ps); | |
555 | usb_unlock_device(dev); | |
556 | usb_put_dev(dev); | |
557 | ps->dev = NULL; | |
558 | kfree(ps); | |
559 | return 0; | |
560 | } | |
561 | ||
562 | static int proc_control(struct dev_state *ps, void __user *arg) | |
563 | { | |
564 | struct usb_device *dev = ps->dev; | |
565 | struct usbdevfs_ctrltransfer ctrl; | |
566 | unsigned int tmo; | |
567 | unsigned char *tbuf; | |
568 | int i, j, ret; | |
569 | ||
570 | if (copy_from_user(&ctrl, arg, sizeof(ctrl))) | |
571 | return -EFAULT; | |
572 | if ((ret = check_ctrlrecip(ps, ctrl.bRequestType, ctrl.wIndex))) | |
573 | return ret; | |
574 | if (ctrl.wLength > PAGE_SIZE) | |
575 | return -EINVAL; | |
576 | if (!(tbuf = (unsigned char *)__get_free_page(GFP_KERNEL))) | |
577 | return -ENOMEM; | |
578 | tmo = ctrl.timeout; | |
579 | if (ctrl.bRequestType & 0x80) { | |
580 | if (ctrl.wLength && !access_ok(VERIFY_WRITE, ctrl.data, ctrl.wLength)) { | |
581 | free_page((unsigned long)tbuf); | |
582 | return -EINVAL; | |
583 | } | |
fe0410c7 AS |
584 | snoop(&dev->dev, "control read: bRequest=%02x " |
585 | "bRrequestType=%02x wValue=%04x " | |
586 | "wIndex=%04x wLength=%04x\n", | |
587 | ctrl.bRequest, ctrl.bRequestType, ctrl.wValue, | |
588 | ctrl.wIndex, ctrl.wLength); | |
1da177e4 LT |
589 | |
590 | usb_unlock_device(dev); | |
591 | i = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), ctrl.bRequest, ctrl.bRequestType, | |
592 | ctrl.wValue, ctrl.wIndex, tbuf, ctrl.wLength, tmo); | |
593 | usb_lock_device(dev); | |
594 | if ((i > 0) && ctrl.wLength) { | |
595 | if (usbfs_snoop) { | |
596 | dev_info(&dev->dev, "control read: data "); | |
fe0410c7 | 597 | for (j = 0; j < i; ++j) |
1da177e4 LT |
598 | printk ("%02x ", (unsigned char)(tbuf)[j]); |
599 | printk("\n"); | |
600 | } | |
fe0410c7 | 601 | if (copy_to_user(ctrl.data, tbuf, i)) { |
1da177e4 LT |
602 | free_page((unsigned long)tbuf); |
603 | return -EFAULT; | |
604 | } | |
605 | } | |
606 | } else { | |
607 | if (ctrl.wLength) { | |
608 | if (copy_from_user(tbuf, ctrl.data, ctrl.wLength)) { | |
609 | free_page((unsigned long)tbuf); | |
610 | return -EFAULT; | |
611 | } | |
612 | } | |
fe0410c7 AS |
613 | snoop(&dev->dev, "control write: bRequest=%02x " |
614 | "bRrequestType=%02x wValue=%04x " | |
615 | "wIndex=%04x wLength=%04x\n", | |
616 | ctrl.bRequest, ctrl.bRequestType, ctrl.wValue, | |
617 | ctrl.wIndex, ctrl.wLength); | |
1da177e4 LT |
618 | if (usbfs_snoop) { |
619 | dev_info(&dev->dev, "control write: data: "); | |
620 | for (j = 0; j < ctrl.wLength; ++j) | |
621 | printk ("%02x ", (unsigned char)(tbuf)[j]); | |
622 | printk("\n"); | |
623 | } | |
624 | usb_unlock_device(dev); | |
625 | i = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), ctrl.bRequest, ctrl.bRequestType, | |
626 | ctrl.wValue, ctrl.wIndex, tbuf, ctrl.wLength, tmo); | |
627 | usb_lock_device(dev); | |
628 | } | |
629 | free_page((unsigned long)tbuf); | |
630 | if (i<0 && i != -EPIPE) { | |
631 | dev_printk(KERN_DEBUG, &dev->dev, "usbfs: USBDEVFS_CONTROL " | |
632 | "failed cmd %s rqt %u rq %u len %u ret %d\n", | |
633 | current->comm, ctrl.bRequestType, ctrl.bRequest, | |
634 | ctrl.wLength, i); | |
635 | } | |
636 | return i; | |
637 | } | |
638 | ||
639 | static int proc_bulk(struct dev_state *ps, void __user *arg) | |
640 | { | |
641 | struct usb_device *dev = ps->dev; | |
642 | struct usbdevfs_bulktransfer bulk; | |
643 | unsigned int tmo, len1, pipe; | |
644 | int len2; | |
645 | unsigned char *tbuf; | |
646 | int i, ret; | |
647 | ||
648 | if (copy_from_user(&bulk, arg, sizeof(bulk))) | |
649 | return -EFAULT; | |
650 | if ((ret = findintfep(ps->dev, bulk.ep)) < 0) | |
651 | return ret; | |
652 | if ((ret = checkintf(ps, ret))) | |
653 | return ret; | |
654 | if (bulk.ep & USB_DIR_IN) | |
655 | pipe = usb_rcvbulkpipe(dev, bulk.ep & 0x7f); | |
656 | else | |
657 | pipe = usb_sndbulkpipe(dev, bulk.ep & 0x7f); | |
658 | if (!usb_maxpacket(dev, pipe, !(bulk.ep & USB_DIR_IN))) | |
659 | return -EINVAL; | |
660 | len1 = bulk.len; | |
661 | if (len1 > MAX_USBFS_BUFFER_SIZE) | |
662 | return -EINVAL; | |
663 | if (!(tbuf = kmalloc(len1, GFP_KERNEL))) | |
664 | return -ENOMEM; | |
665 | tmo = bulk.timeout; | |
666 | if (bulk.ep & 0x80) { | |
667 | if (len1 && !access_ok(VERIFY_WRITE, bulk.data, len1)) { | |
668 | kfree(tbuf); | |
669 | return -EINVAL; | |
670 | } | |
671 | usb_unlock_device(dev); | |
672 | i = usb_bulk_msg(dev, pipe, tbuf, len1, &len2, tmo); | |
673 | usb_lock_device(dev); | |
674 | if (!i && len2) { | |
675 | if (copy_to_user(bulk.data, tbuf, len2)) { | |
676 | kfree(tbuf); | |
677 | return -EFAULT; | |
678 | } | |
679 | } | |
680 | } else { | |
681 | if (len1) { | |
682 | if (copy_from_user(tbuf, bulk.data, len1)) { | |
683 | kfree(tbuf); | |
684 | return -EFAULT; | |
685 | } | |
686 | } | |
687 | usb_unlock_device(dev); | |
688 | i = usb_bulk_msg(dev, pipe, tbuf, len1, &len2, tmo); | |
689 | usb_lock_device(dev); | |
690 | } | |
691 | kfree(tbuf); | |
692 | if (i < 0) | |
693 | return i; | |
694 | return len2; | |
695 | } | |
696 | ||
697 | static int proc_resetep(struct dev_state *ps, void __user *arg) | |
698 | { | |
699 | unsigned int ep; | |
700 | int ret; | |
701 | ||
702 | if (get_user(ep, (unsigned int __user *)arg)) | |
703 | return -EFAULT; | |
704 | if ((ret = findintfep(ps->dev, ep)) < 0) | |
705 | return ret; | |
706 | if ((ret = checkintf(ps, ret))) | |
707 | return ret; | |
708 | usb_settoggle(ps->dev, ep & 0xf, !(ep & USB_DIR_IN), 0); | |
709 | return 0; | |
710 | } | |
711 | ||
712 | static int proc_clearhalt(struct dev_state *ps, void __user *arg) | |
713 | { | |
714 | unsigned int ep; | |
715 | int pipe; | |
716 | int ret; | |
717 | ||
718 | if (get_user(ep, (unsigned int __user *)arg)) | |
719 | return -EFAULT; | |
720 | if ((ret = findintfep(ps->dev, ep)) < 0) | |
721 | return ret; | |
722 | if ((ret = checkintf(ps, ret))) | |
723 | return ret; | |
724 | if (ep & USB_DIR_IN) | |
725 | pipe = usb_rcvbulkpipe(ps->dev, ep & 0x7f); | |
726 | else | |
727 | pipe = usb_sndbulkpipe(ps->dev, ep & 0x7f); | |
728 | ||
729 | return usb_clear_halt(ps->dev, pipe); | |
730 | } | |
731 | ||
732 | ||
733 | static int proc_getdriver(struct dev_state *ps, void __user *arg) | |
734 | { | |
735 | struct usbdevfs_getdriver gd; | |
736 | struct usb_interface *intf; | |
737 | int ret; | |
738 | ||
739 | if (copy_from_user(&gd, arg, sizeof(gd))) | |
740 | return -EFAULT; | |
741 | down_read(&usb_bus_type.subsys.rwsem); | |
742 | intf = usb_ifnum_to_if(ps->dev, gd.interface); | |
743 | if (!intf || !intf->dev.driver) | |
744 | ret = -ENODATA; | |
745 | else { | |
746 | strncpy(gd.driver, intf->dev.driver->name, | |
747 | sizeof(gd.driver)); | |
748 | ret = (copy_to_user(arg, &gd, sizeof(gd)) ? -EFAULT : 0); | |
749 | } | |
750 | up_read(&usb_bus_type.subsys.rwsem); | |
751 | return ret; | |
752 | } | |
753 | ||
754 | static int proc_connectinfo(struct dev_state *ps, void __user *arg) | |
755 | { | |
756 | struct usbdevfs_connectinfo ci; | |
757 | ||
758 | ci.devnum = ps->dev->devnum; | |
759 | ci.slow = ps->dev->speed == USB_SPEED_LOW; | |
760 | if (copy_to_user(arg, &ci, sizeof(ci))) | |
761 | return -EFAULT; | |
762 | return 0; | |
763 | } | |
764 | ||
765 | static int proc_resetdevice(struct dev_state *ps) | |
766 | { | |
767 | return usb_reset_device(ps->dev); | |
768 | ||
769 | } | |
770 | ||
771 | static int proc_setintf(struct dev_state *ps, void __user *arg) | |
772 | { | |
773 | struct usbdevfs_setinterface setintf; | |
774 | int ret; | |
775 | ||
776 | if (copy_from_user(&setintf, arg, sizeof(setintf))) | |
777 | return -EFAULT; | |
778 | if ((ret = checkintf(ps, setintf.interface))) | |
779 | return ret; | |
780 | return usb_set_interface(ps->dev, setintf.interface, | |
781 | setintf.altsetting); | |
782 | } | |
783 | ||
784 | static int proc_setconfig(struct dev_state *ps, void __user *arg) | |
785 | { | |
786 | unsigned int u; | |
787 | int status = 0; | |
788 | struct usb_host_config *actconfig; | |
789 | ||
790 | if (get_user(u, (unsigned int __user *)arg)) | |
791 | return -EFAULT; | |
792 | ||
793 | actconfig = ps->dev->actconfig; | |
794 | ||
795 | /* Don't touch the device if any interfaces are claimed. | |
796 | * It could interfere with other drivers' operations, and if | |
797 | * an interface is claimed by usbfs it could easily deadlock. | |
798 | */ | |
799 | if (actconfig) { | |
800 | int i; | |
801 | ||
802 | for (i = 0; i < actconfig->desc.bNumInterfaces; ++i) { | |
803 | if (usb_interface_claimed(actconfig->interface[i])) { | |
804 | dev_warn (&ps->dev->dev, | |
72ebddb5 | 805 | "usbfs: interface %d claimed by %s " |
1da177e4 LT |
806 | "while '%s' sets config #%d\n", |
807 | actconfig->interface[i] | |
808 | ->cur_altsetting | |
809 | ->desc.bInterfaceNumber, | |
72ebddb5 DB |
810 | actconfig->interface[i] |
811 | ->dev.driver->name, | |
1da177e4 | 812 | current->comm, u); |
1da177e4 LT |
813 | status = -EBUSY; |
814 | break; | |
1da177e4 LT |
815 | } |
816 | } | |
817 | } | |
818 | ||
819 | /* SET_CONFIGURATION is often abused as a "cheap" driver reset, | |
820 | * so avoid usb_set_configuration()'s kick to sysfs | |
821 | */ | |
822 | if (status == 0) { | |
823 | if (actconfig && actconfig->desc.bConfigurationValue == u) | |
824 | status = usb_reset_configuration(ps->dev); | |
825 | else | |
826 | status = usb_set_configuration(ps->dev, u); | |
827 | } | |
828 | ||
829 | return status; | |
830 | } | |
831 | ||
832 | ||
833 | static int proc_do_submiturb(struct dev_state *ps, struct usbdevfs_urb *uurb, | |
834 | struct usbdevfs_iso_packet_desc __user *iso_frame_desc, | |
835 | void __user *arg) | |
836 | { | |
837 | struct usbdevfs_iso_packet_desc *isopkt = NULL; | |
838 | struct usb_host_endpoint *ep; | |
839 | struct async *as; | |
840 | struct usb_ctrlrequest *dr = NULL; | |
841 | unsigned int u, totlen, isofrmlen; | |
842 | int ret, interval = 0, ifnum = -1; | |
843 | ||
844 | if (uurb->flags & ~(USBDEVFS_URB_ISO_ASAP|USBDEVFS_URB_SHORT_NOT_OK| | |
845 | URB_NO_FSBR|URB_ZERO_PACKET)) | |
846 | return -EINVAL; | |
847 | if (!uurb->buffer) | |
848 | return -EINVAL; | |
849 | if (uurb->signr != 0 && (uurb->signr < SIGRTMIN || uurb->signr > SIGRTMAX)) | |
850 | return -EINVAL; | |
851 | if (!(uurb->type == USBDEVFS_URB_TYPE_CONTROL && (uurb->endpoint & ~USB_ENDPOINT_DIR_MASK) == 0)) { | |
852 | if ((ifnum = findintfep(ps->dev, uurb->endpoint)) < 0) | |
853 | return ifnum; | |
854 | if ((ret = checkintf(ps, ifnum))) | |
855 | return ret; | |
856 | } | |
857 | if ((uurb->endpoint & USB_ENDPOINT_DIR_MASK) != 0) | |
858 | ep = ps->dev->ep_in [uurb->endpoint & USB_ENDPOINT_NUMBER_MASK]; | |
859 | else | |
860 | ep = ps->dev->ep_out [uurb->endpoint & USB_ENDPOINT_NUMBER_MASK]; | |
861 | if (!ep) | |
862 | return -ENOENT; | |
863 | switch(uurb->type) { | |
864 | case USBDEVFS_URB_TYPE_CONTROL: | |
865 | if ((ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) | |
866 | != USB_ENDPOINT_XFER_CONTROL) | |
867 | return -EINVAL; | |
868 | /* min 8 byte setup packet, max arbitrary */ | |
869 | if (uurb->buffer_length < 8 || uurb->buffer_length > PAGE_SIZE) | |
870 | return -EINVAL; | |
871 | if (!(dr = kmalloc(sizeof(struct usb_ctrlrequest), GFP_KERNEL))) | |
872 | return -ENOMEM; | |
873 | if (copy_from_user(dr, uurb->buffer, 8)) { | |
874 | kfree(dr); | |
875 | return -EFAULT; | |
876 | } | |
877 | if (uurb->buffer_length < (le16_to_cpup(&dr->wLength) + 8)) { | |
878 | kfree(dr); | |
879 | return -EINVAL; | |
880 | } | |
881 | if ((ret = check_ctrlrecip(ps, dr->bRequestType, le16_to_cpup(&dr->wIndex)))) { | |
882 | kfree(dr); | |
883 | return ret; | |
884 | } | |
885 | uurb->endpoint = (uurb->endpoint & ~USB_ENDPOINT_DIR_MASK) | (dr->bRequestType & USB_ENDPOINT_DIR_MASK); | |
886 | uurb->number_of_packets = 0; | |
887 | uurb->buffer_length = le16_to_cpup(&dr->wLength); | |
888 | uurb->buffer += 8; | |
889 | if (!access_ok((uurb->endpoint & USB_DIR_IN) ? VERIFY_WRITE : VERIFY_READ, uurb->buffer, uurb->buffer_length)) { | |
890 | kfree(dr); | |
891 | return -EFAULT; | |
892 | } | |
893 | break; | |
894 | ||
895 | case USBDEVFS_URB_TYPE_BULK: | |
896 | switch (ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) { | |
897 | case USB_ENDPOINT_XFER_CONTROL: | |
898 | case USB_ENDPOINT_XFER_ISOC: | |
899 | return -EINVAL; | |
900 | /* allow single-shot interrupt transfers, at bogus rates */ | |
901 | } | |
902 | uurb->number_of_packets = 0; | |
903 | if (uurb->buffer_length > MAX_USBFS_BUFFER_SIZE) | |
904 | return -EINVAL; | |
905 | if (!access_ok((uurb->endpoint & USB_DIR_IN) ? VERIFY_WRITE : VERIFY_READ, uurb->buffer, uurb->buffer_length)) | |
906 | return -EFAULT; | |
907 | break; | |
908 | ||
909 | case USBDEVFS_URB_TYPE_ISO: | |
910 | /* arbitrary limit */ | |
911 | if (uurb->number_of_packets < 1 || uurb->number_of_packets > 128) | |
912 | return -EINVAL; | |
913 | if ((ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) | |
914 | != USB_ENDPOINT_XFER_ISOC) | |
915 | return -EINVAL; | |
916 | interval = 1 << min (15, ep->desc.bInterval - 1); | |
917 | isofrmlen = sizeof(struct usbdevfs_iso_packet_desc) * uurb->number_of_packets; | |
918 | if (!(isopkt = kmalloc(isofrmlen, GFP_KERNEL))) | |
919 | return -ENOMEM; | |
920 | if (copy_from_user(isopkt, iso_frame_desc, isofrmlen)) { | |
921 | kfree(isopkt); | |
922 | return -EFAULT; | |
923 | } | |
924 | for (totlen = u = 0; u < uurb->number_of_packets; u++) { | |
925 | if (isopkt[u].length > 1023) { | |
926 | kfree(isopkt); | |
927 | return -EINVAL; | |
928 | } | |
929 | totlen += isopkt[u].length; | |
930 | } | |
931 | if (totlen > 32768) { | |
932 | kfree(isopkt); | |
933 | return -EINVAL; | |
934 | } | |
935 | uurb->buffer_length = totlen; | |
936 | break; | |
937 | ||
938 | case USBDEVFS_URB_TYPE_INTERRUPT: | |
939 | uurb->number_of_packets = 0; | |
940 | if ((ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) | |
941 | != USB_ENDPOINT_XFER_INT) | |
942 | return -EINVAL; | |
943 | if (ps->dev->speed == USB_SPEED_HIGH) | |
944 | interval = 1 << min (15, ep->desc.bInterval - 1); | |
945 | else | |
946 | interval = ep->desc.bInterval; | |
947 | if (uurb->buffer_length > MAX_USBFS_BUFFER_SIZE) | |
948 | return -EINVAL; | |
949 | if (!access_ok((uurb->endpoint & USB_DIR_IN) ? VERIFY_WRITE : VERIFY_READ, uurb->buffer, uurb->buffer_length)) | |
950 | return -EFAULT; | |
951 | break; | |
952 | ||
953 | default: | |
954 | return -EINVAL; | |
955 | } | |
956 | if (!(as = alloc_async(uurb->number_of_packets))) { | |
6fd19f4b JJ |
957 | kfree(isopkt); |
958 | kfree(dr); | |
1da177e4 LT |
959 | return -ENOMEM; |
960 | } | |
961 | if (!(as->urb->transfer_buffer = kmalloc(uurb->buffer_length, GFP_KERNEL))) { | |
6fd19f4b JJ |
962 | kfree(isopkt); |
963 | kfree(dr); | |
1da177e4 LT |
964 | free_async(as); |
965 | return -ENOMEM; | |
966 | } | |
967 | as->urb->dev = ps->dev; | |
968 | as->urb->pipe = (uurb->type << 30) | __create_pipe(ps->dev, uurb->endpoint & 0xf) | (uurb->endpoint & USB_DIR_IN); | |
969 | as->urb->transfer_flags = uurb->flags; | |
970 | as->urb->transfer_buffer_length = uurb->buffer_length; | |
971 | as->urb->setup_packet = (unsigned char*)dr; | |
972 | as->urb->start_frame = uurb->start_frame; | |
973 | as->urb->number_of_packets = uurb->number_of_packets; | |
974 | as->urb->interval = interval; | |
975 | as->urb->context = as; | |
976 | as->urb->complete = async_completed; | |
977 | for (totlen = u = 0; u < uurb->number_of_packets; u++) { | |
978 | as->urb->iso_frame_desc[u].offset = totlen; | |
979 | as->urb->iso_frame_desc[u].length = isopkt[u].length; | |
980 | totlen += isopkt[u].length; | |
981 | } | |
6fd19f4b | 982 | kfree(isopkt); |
1da177e4 LT |
983 | as->ps = ps; |
984 | as->userurb = arg; | |
985 | if (uurb->endpoint & USB_DIR_IN) | |
986 | as->userbuffer = uurb->buffer; | |
987 | else | |
988 | as->userbuffer = NULL; | |
989 | as->signr = uurb->signr; | |
990 | as->ifnum = ifnum; | |
991 | as->task = current; | |
992 | if (!(uurb->endpoint & USB_DIR_IN)) { | |
993 | if (copy_from_user(as->urb->transfer_buffer, uurb->buffer, as->urb->transfer_buffer_length)) { | |
994 | free_async(as); | |
995 | return -EFAULT; | |
996 | } | |
997 | } | |
998 | async_newpending(as); | |
999 | if ((ret = usb_submit_urb(as->urb, GFP_KERNEL))) { | |
1000 | dev_printk(KERN_DEBUG, &ps->dev->dev, "usbfs: usb_submit_urb returned %d\n", ret); | |
1001 | async_removepending(as); | |
1002 | free_async(as); | |
1003 | return ret; | |
1004 | } | |
1005 | return 0; | |
1006 | } | |
1007 | ||
1008 | static int proc_submiturb(struct dev_state *ps, void __user *arg) | |
1009 | { | |
1010 | struct usbdevfs_urb uurb; | |
1011 | ||
1012 | if (copy_from_user(&uurb, arg, sizeof(uurb))) | |
1013 | return -EFAULT; | |
1014 | ||
1015 | return proc_do_submiturb(ps, &uurb, (((struct usbdevfs_urb __user *)arg)->iso_frame_desc), arg); | |
1016 | } | |
1017 | ||
1018 | static int proc_unlinkurb(struct dev_state *ps, void __user *arg) | |
1019 | { | |
1020 | struct async *as; | |
1021 | ||
1022 | as = async_getpending(ps, arg); | |
1023 | if (!as) | |
1024 | return -EINVAL; | |
1025 | usb_kill_urb(as->urb); | |
1026 | return 0; | |
1027 | } | |
1028 | ||
1029 | static int processcompl(struct async *as, void __user * __user *arg) | |
1030 | { | |
1031 | struct urb *urb = as->urb; | |
1032 | struct usbdevfs_urb __user *userurb = as->userurb; | |
1033 | void __user *addr = as->userurb; | |
1034 | unsigned int i; | |
1035 | ||
1036 | if (as->userbuffer) | |
1037 | if (copy_to_user(as->userbuffer, urb->transfer_buffer, urb->transfer_buffer_length)) | |
1038 | return -EFAULT; | |
1039 | if (put_user(urb->status, &userurb->status)) | |
1040 | return -EFAULT; | |
1041 | if (put_user(urb->actual_length, &userurb->actual_length)) | |
1042 | return -EFAULT; | |
1043 | if (put_user(urb->error_count, &userurb->error_count)) | |
1044 | return -EFAULT; | |
1045 | ||
668a9541 CL |
1046 | if (usb_pipeisoc(urb->pipe)) { |
1047 | for (i = 0; i < urb->number_of_packets; i++) { | |
1048 | if (put_user(urb->iso_frame_desc[i].actual_length, | |
1049 | &userurb->iso_frame_desc[i].actual_length)) | |
1050 | return -EFAULT; | |
1051 | if (put_user(urb->iso_frame_desc[i].status, | |
1052 | &userurb->iso_frame_desc[i].status)) | |
1053 | return -EFAULT; | |
1054 | } | |
1da177e4 LT |
1055 | } |
1056 | ||
1057 | free_async(as); | |
1058 | ||
1059 | if (put_user(addr, (void __user * __user *)arg)) | |
1060 | return -EFAULT; | |
1061 | return 0; | |
1062 | } | |
1063 | ||
1064 | static struct async* reap_as(struct dev_state *ps) | |
1065 | { | |
1066 | DECLARE_WAITQUEUE(wait, current); | |
1067 | struct async *as = NULL; | |
1068 | struct usb_device *dev = ps->dev; | |
1069 | ||
1070 | add_wait_queue(&ps->wait, &wait); | |
1071 | for (;;) { | |
1072 | __set_current_state(TASK_INTERRUPTIBLE); | |
1073 | if ((as = async_getcompleted(ps))) | |
1074 | break; | |
1075 | if (signal_pending(current)) | |
1076 | break; | |
1077 | usb_unlock_device(dev); | |
1078 | schedule(); | |
1079 | usb_lock_device(dev); | |
1080 | } | |
1081 | remove_wait_queue(&ps->wait, &wait); | |
1082 | set_current_state(TASK_RUNNING); | |
1083 | return as; | |
1084 | } | |
1085 | ||
1086 | static int proc_reapurb(struct dev_state *ps, void __user *arg) | |
1087 | { | |
1088 | struct async *as = reap_as(ps); | |
1089 | if (as) | |
1090 | return processcompl(as, (void __user * __user *)arg); | |
1091 | if (signal_pending(current)) | |
1092 | return -EINTR; | |
1093 | return -EIO; | |
1094 | } | |
1095 | ||
1096 | static int proc_reapurbnonblock(struct dev_state *ps, void __user *arg) | |
1097 | { | |
1098 | struct async *as; | |
1099 | ||
1100 | if (!(as = async_getcompleted(ps))) | |
1101 | return -EAGAIN; | |
1102 | return processcompl(as, (void __user * __user *)arg); | |
1103 | } | |
1104 | ||
1105 | #ifdef CONFIG_COMPAT | |
1106 | ||
1107 | static int get_urb32(struct usbdevfs_urb *kurb, | |
1108 | struct usbdevfs_urb32 __user *uurb) | |
1109 | { | |
1110 | __u32 uptr; | |
1111 | if (get_user(kurb->type, &uurb->type) || | |
1112 | __get_user(kurb->endpoint, &uurb->endpoint) || | |
1113 | __get_user(kurb->status, &uurb->status) || | |
1114 | __get_user(kurb->flags, &uurb->flags) || | |
1115 | __get_user(kurb->buffer_length, &uurb->buffer_length) || | |
1116 | __get_user(kurb->actual_length, &uurb->actual_length) || | |
1117 | __get_user(kurb->start_frame, &uurb->start_frame) || | |
1118 | __get_user(kurb->number_of_packets, &uurb->number_of_packets) || | |
1119 | __get_user(kurb->error_count, &uurb->error_count) || | |
1120 | __get_user(kurb->signr, &uurb->signr)) | |
1121 | return -EFAULT; | |
1122 | ||
1123 | if (__get_user(uptr, &uurb->buffer)) | |
1124 | return -EFAULT; | |
1125 | kurb->buffer = compat_ptr(uptr); | |
1126 | if (__get_user(uptr, &uurb->buffer)) | |
1127 | return -EFAULT; | |
1128 | kurb->usercontext = compat_ptr(uptr); | |
1129 | ||
1130 | return 0; | |
1131 | } | |
1132 | ||
1133 | static int proc_submiturb_compat(struct dev_state *ps, void __user *arg) | |
1134 | { | |
1135 | struct usbdevfs_urb uurb; | |
1136 | ||
1137 | if (get_urb32(&uurb,(struct usbdevfs_urb32 *)arg)) | |
1138 | return -EFAULT; | |
1139 | ||
668a9541 | 1140 | return proc_do_submiturb(ps, &uurb, ((struct usbdevfs_urb32 __user *)arg)->iso_frame_desc, arg); |
1da177e4 LT |
1141 | } |
1142 | ||
1143 | static int processcompl_compat(struct async *as, void __user * __user *arg) | |
1144 | { | |
1145 | struct urb *urb = as->urb; | |
1146 | struct usbdevfs_urb32 __user *userurb = as->userurb; | |
1147 | void __user *addr = as->userurb; | |
1148 | unsigned int i; | |
1149 | ||
1150 | if (as->userbuffer) | |
1151 | if (copy_to_user(as->userbuffer, urb->transfer_buffer, urb->transfer_buffer_length)) | |
1152 | return -EFAULT; | |
1153 | if (put_user(urb->status, &userurb->status)) | |
1154 | return -EFAULT; | |
1155 | if (put_user(urb->actual_length, &userurb->actual_length)) | |
1156 | return -EFAULT; | |
1157 | if (put_user(urb->error_count, &userurb->error_count)) | |
1158 | return -EFAULT; | |
1159 | ||
668a9541 CL |
1160 | if (usb_pipeisoc(urb->pipe)) { |
1161 | for (i = 0; i < urb->number_of_packets; i++) { | |
1162 | if (put_user(urb->iso_frame_desc[i].actual_length, | |
1163 | &userurb->iso_frame_desc[i].actual_length)) | |
1164 | return -EFAULT; | |
1165 | if (put_user(urb->iso_frame_desc[i].status, | |
1166 | &userurb->iso_frame_desc[i].status)) | |
1167 | return -EFAULT; | |
1168 | } | |
1da177e4 LT |
1169 | } |
1170 | ||
1171 | free_async(as); | |
1172 | if (put_user((u32)(u64)addr, (u32 __user *)arg)) | |
1173 | return -EFAULT; | |
1174 | return 0; | |
1175 | } | |
1176 | ||
1177 | static int proc_reapurb_compat(struct dev_state *ps, void __user *arg) | |
1178 | { | |
1179 | struct async *as = reap_as(ps); | |
1180 | if (as) | |
1181 | return processcompl_compat(as, (void __user * __user *)arg); | |
1182 | if (signal_pending(current)) | |
1183 | return -EINTR; | |
1184 | return -EIO; | |
1185 | } | |
1186 | ||
1187 | static int proc_reapurbnonblock_compat(struct dev_state *ps, void __user *arg) | |
1188 | { | |
1189 | struct async *as; | |
1190 | ||
1da177e4 LT |
1191 | if (!(as = async_getcompleted(ps))) |
1192 | return -EAGAIN; | |
1da177e4 LT |
1193 | return processcompl_compat(as, (void __user * __user *)arg); |
1194 | } | |
1195 | ||
1196 | #endif | |
1197 | ||
1198 | static int proc_disconnectsignal(struct dev_state *ps, void __user *arg) | |
1199 | { | |
1200 | struct usbdevfs_disconnectsignal ds; | |
1201 | ||
1202 | if (copy_from_user(&ds, arg, sizeof(ds))) | |
1203 | return -EFAULT; | |
1204 | if (ds.signr != 0 && (ds.signr < SIGRTMIN || ds.signr > SIGRTMAX)) | |
1205 | return -EINVAL; | |
1206 | ps->discsignr = ds.signr; | |
1207 | ps->disccontext = ds.context; | |
1208 | return 0; | |
1209 | } | |
1210 | ||
1211 | static int proc_claiminterface(struct dev_state *ps, void __user *arg) | |
1212 | { | |
1213 | unsigned int ifnum; | |
1214 | ||
1215 | if (get_user(ifnum, (unsigned int __user *)arg)) | |
1216 | return -EFAULT; | |
1217 | return claimintf(ps, ifnum); | |
1218 | } | |
1219 | ||
1220 | static int proc_releaseinterface(struct dev_state *ps, void __user *arg) | |
1221 | { | |
1222 | unsigned int ifnum; | |
1223 | int ret; | |
1224 | ||
1225 | if (get_user(ifnum, (unsigned int __user *)arg)) | |
1226 | return -EFAULT; | |
1227 | if ((ret = releaseintf(ps, ifnum)) < 0) | |
1228 | return ret; | |
1229 | destroy_async_on_interface (ps, ifnum); | |
1230 | return 0; | |
1231 | } | |
1232 | ||
1233 | static int proc_ioctl (struct dev_state *ps, void __user *arg) | |
1234 | { | |
1235 | struct usbdevfs_ioctl ctrl; | |
1236 | int size; | |
1237 | void *buf = NULL; | |
1238 | int retval = 0; | |
1239 | struct usb_interface *intf = NULL; | |
1240 | struct usb_driver *driver = NULL; | |
1da177e4 LT |
1241 | |
1242 | /* get input parameters and alloc buffer */ | |
1243 | if (copy_from_user(&ctrl, arg, sizeof (ctrl))) | |
1244 | return -EFAULT; | |
1245 | if ((size = _IOC_SIZE (ctrl.ioctl_code)) > 0) { | |
1246 | if ((buf = kmalloc (size, GFP_KERNEL)) == NULL) | |
1247 | return -ENOMEM; | |
1248 | if ((_IOC_DIR(ctrl.ioctl_code) & _IOC_WRITE)) { | |
1249 | if (copy_from_user (buf, ctrl.data, size)) { | |
6fd19f4b | 1250 | kfree(buf); |
1da177e4 LT |
1251 | return -EFAULT; |
1252 | } | |
1253 | } else { | |
1254 | memset (buf, 0, size); | |
1255 | } | |
1256 | } | |
1257 | ||
1258 | if (!connected(ps->dev)) { | |
6fd19f4b | 1259 | kfree(buf); |
1da177e4 LT |
1260 | return -ENODEV; |
1261 | } | |
1262 | ||
1263 | if (ps->dev->state != USB_STATE_CONFIGURED) | |
1264 | retval = -EHOSTUNREACH; | |
1265 | else if (!(intf = usb_ifnum_to_if (ps->dev, ctrl.ifno))) | |
1266 | retval = -EINVAL; | |
1267 | else switch (ctrl.ioctl_code) { | |
1268 | ||
1269 | /* disconnect kernel driver from interface */ | |
1270 | case USBDEVFS_DISCONNECT: | |
1271 | ||
1da177e4 LT |
1272 | down_write(&usb_bus_type.subsys.rwsem); |
1273 | if (intf->dev.driver) { | |
1274 | driver = to_usb_driver(intf->dev.driver); | |
1275 | dev_dbg (&intf->dev, "disconnect by usbfs\n"); | |
1276 | usb_driver_release_interface(driver, intf); | |
1277 | } else | |
1278 | retval = -ENODATA; | |
1279 | up_write(&usb_bus_type.subsys.rwsem); | |
1280 | break; | |
1281 | ||
1282 | /* let kernel drivers try to (re)bind to the interface */ | |
1283 | case USBDEVFS_CONNECT: | |
1284 | usb_unlock_device(ps->dev); | |
1285 | usb_lock_all_devices(); | |
1286 | bus_rescan_devices(intf->dev.bus); | |
1287 | usb_unlock_all_devices(); | |
1288 | usb_lock_device(ps->dev); | |
1289 | break; | |
1290 | ||
1291 | /* talk directly to the interface's driver */ | |
1292 | default: | |
1293 | down_read(&usb_bus_type.subsys.rwsem); | |
1294 | if (intf->dev.driver) | |
1295 | driver = to_usb_driver(intf->dev.driver); | |
1296 | if (driver == NULL || driver->ioctl == NULL) { | |
1297 | retval = -ENOTTY; | |
1298 | } else { | |
1299 | retval = driver->ioctl (intf, ctrl.ioctl_code, buf); | |
1300 | if (retval == -ENOIOCTLCMD) | |
1301 | retval = -ENOTTY; | |
1302 | } | |
1303 | up_read(&usb_bus_type.subsys.rwsem); | |
1304 | } | |
1305 | ||
1306 | /* cleanup and return */ | |
1307 | if (retval >= 0 | |
1308 | && (_IOC_DIR (ctrl.ioctl_code) & _IOC_READ) != 0 | |
1309 | && size > 0 | |
1310 | && copy_to_user (ctrl.data, buf, size) != 0) | |
1311 | retval = -EFAULT; | |
6fd19f4b JJ |
1312 | |
1313 | kfree(buf); | |
1da177e4 LT |
1314 | return retval; |
1315 | } | |
1316 | ||
1317 | /* | |
1318 | * NOTE: All requests here that have interface numbers as parameters | |
1319 | * are assuming that somehow the configuration has been prevented from | |
1320 | * changing. But there's no mechanism to ensure that... | |
1321 | */ | |
1322 | static int usbdev_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg) | |
1323 | { | |
1324 | struct dev_state *ps = (struct dev_state *)file->private_data; | |
1325 | struct usb_device *dev = ps->dev; | |
1326 | void __user *p = (void __user *)arg; | |
1327 | int ret = -ENOTTY; | |
1328 | ||
1329 | if (!(file->f_mode & FMODE_WRITE)) | |
1330 | return -EPERM; | |
1331 | usb_lock_device(dev); | |
1332 | if (!connected(dev)) { | |
1333 | usb_unlock_device(dev); | |
1334 | return -ENODEV; | |
1335 | } | |
1336 | ||
1337 | switch (cmd) { | |
1338 | case USBDEVFS_CONTROL: | |
1339 | snoop(&dev->dev, "%s: CONTROL\n", __FUNCTION__); | |
1340 | ret = proc_control(ps, p); | |
1341 | if (ret >= 0) | |
1342 | inode->i_mtime = CURRENT_TIME; | |
1343 | break; | |
1344 | ||
1345 | case USBDEVFS_BULK: | |
1346 | snoop(&dev->dev, "%s: BULK\n", __FUNCTION__); | |
1347 | ret = proc_bulk(ps, p); | |
1348 | if (ret >= 0) | |
1349 | inode->i_mtime = CURRENT_TIME; | |
1350 | break; | |
1351 | ||
1352 | case USBDEVFS_RESETEP: | |
1353 | snoop(&dev->dev, "%s: RESETEP\n", __FUNCTION__); | |
1354 | ret = proc_resetep(ps, p); | |
1355 | if (ret >= 0) | |
1356 | inode->i_mtime = CURRENT_TIME; | |
1357 | break; | |
1358 | ||
1359 | case USBDEVFS_RESET: | |
1360 | snoop(&dev->dev, "%s: RESET\n", __FUNCTION__); | |
1361 | ret = proc_resetdevice(ps); | |
1362 | break; | |
1363 | ||
1364 | case USBDEVFS_CLEAR_HALT: | |
1365 | snoop(&dev->dev, "%s: CLEAR_HALT\n", __FUNCTION__); | |
1366 | ret = proc_clearhalt(ps, p); | |
1367 | if (ret >= 0) | |
1368 | inode->i_mtime = CURRENT_TIME; | |
1369 | break; | |
1370 | ||
1371 | case USBDEVFS_GETDRIVER: | |
1372 | snoop(&dev->dev, "%s: GETDRIVER\n", __FUNCTION__); | |
1373 | ret = proc_getdriver(ps, p); | |
1374 | break; | |
1375 | ||
1376 | case USBDEVFS_CONNECTINFO: | |
1377 | snoop(&dev->dev, "%s: CONNECTINFO\n", __FUNCTION__); | |
1378 | ret = proc_connectinfo(ps, p); | |
1379 | break; | |
1380 | ||
1381 | case USBDEVFS_SETINTERFACE: | |
1382 | snoop(&dev->dev, "%s: SETINTERFACE\n", __FUNCTION__); | |
1383 | ret = proc_setintf(ps, p); | |
1384 | break; | |
1385 | ||
1386 | case USBDEVFS_SETCONFIGURATION: | |
1387 | snoop(&dev->dev, "%s: SETCONFIGURATION\n", __FUNCTION__); | |
1388 | ret = proc_setconfig(ps, p); | |
1389 | break; | |
1390 | ||
1391 | case USBDEVFS_SUBMITURB: | |
1392 | snoop(&dev->dev, "%s: SUBMITURB\n", __FUNCTION__); | |
1393 | ret = proc_submiturb(ps, p); | |
1394 | if (ret >= 0) | |
1395 | inode->i_mtime = CURRENT_TIME; | |
1396 | break; | |
1397 | ||
1398 | #ifdef CONFIG_COMPAT | |
1399 | ||
1400 | case USBDEVFS_SUBMITURB32: | |
1401 | snoop(&dev->dev, "%s: SUBMITURB32\n", __FUNCTION__); | |
1402 | ret = proc_submiturb_compat(ps, p); | |
1403 | if (ret >= 0) | |
1404 | inode->i_mtime = CURRENT_TIME; | |
1405 | break; | |
1406 | ||
1407 | case USBDEVFS_REAPURB32: | |
1408 | snoop(&dev->dev, "%s: REAPURB32\n", __FUNCTION__); | |
1409 | ret = proc_reapurb_compat(ps, p); | |
1410 | break; | |
1411 | ||
1412 | case USBDEVFS_REAPURBNDELAY32: | |
1413 | snoop(&dev->dev, "%s: REAPURBDELAY32\n", __FUNCTION__); | |
1414 | ret = proc_reapurbnonblock_compat(ps, p); | |
1415 | break; | |
1416 | ||
1417 | #endif | |
1418 | ||
1419 | case USBDEVFS_DISCARDURB: | |
1420 | snoop(&dev->dev, "%s: DISCARDURB\n", __FUNCTION__); | |
1421 | ret = proc_unlinkurb(ps, p); | |
1422 | break; | |
1423 | ||
1424 | case USBDEVFS_REAPURB: | |
1425 | snoop(&dev->dev, "%s: REAPURB\n", __FUNCTION__); | |
1426 | ret = proc_reapurb(ps, p); | |
1427 | break; | |
1428 | ||
1429 | case USBDEVFS_REAPURBNDELAY: | |
1430 | snoop(&dev->dev, "%s: REAPURBDELAY\n", __FUNCTION__); | |
1431 | ret = proc_reapurbnonblock(ps, p); | |
1432 | break; | |
1433 | ||
1434 | case USBDEVFS_DISCSIGNAL: | |
1435 | snoop(&dev->dev, "%s: DISCSIGNAL\n", __FUNCTION__); | |
1436 | ret = proc_disconnectsignal(ps, p); | |
1437 | break; | |
1438 | ||
1439 | case USBDEVFS_CLAIMINTERFACE: | |
1440 | snoop(&dev->dev, "%s: CLAIMINTERFACE\n", __FUNCTION__); | |
1441 | ret = proc_claiminterface(ps, p); | |
1442 | break; | |
1443 | ||
1444 | case USBDEVFS_RELEASEINTERFACE: | |
1445 | snoop(&dev->dev, "%s: RELEASEINTERFACE\n", __FUNCTION__); | |
1446 | ret = proc_releaseinterface(ps, p); | |
1447 | break; | |
1448 | ||
1449 | case USBDEVFS_IOCTL: | |
1450 | snoop(&dev->dev, "%s: IOCTL\n", __FUNCTION__); | |
1451 | ret = proc_ioctl(ps, p); | |
1452 | break; | |
1453 | } | |
1454 | usb_unlock_device(dev); | |
1455 | if (ret >= 0) | |
1456 | inode->i_atime = CURRENT_TIME; | |
1457 | return ret; | |
1458 | } | |
1459 | ||
1460 | /* No kernel lock - fine */ | |
1461 | static unsigned int usbdev_poll(struct file *file, struct poll_table_struct *wait) | |
1462 | { | |
1463 | struct dev_state *ps = (struct dev_state *)file->private_data; | |
1464 | unsigned int mask = 0; | |
1465 | ||
1466 | poll_wait(file, &ps->wait, wait); | |
1467 | if (file->f_mode & FMODE_WRITE && !list_empty(&ps->async_completed)) | |
1468 | mask |= POLLOUT | POLLWRNORM; | |
1469 | if (!connected(ps->dev)) | |
1470 | mask |= POLLERR | POLLHUP; | |
1471 | return mask; | |
1472 | } | |
1473 | ||
1474 | struct file_operations usbfs_device_file_operations = { | |
1475 | .llseek = usbdev_lseek, | |
1476 | .read = usbdev_read, | |
1477 | .poll = usbdev_poll, | |
1478 | .ioctl = usbdev_ioctl, | |
1479 | .open = usbdev_open, | |
1480 | .release = usbdev_release, | |
1481 | }; | |
fbf82fd2 KS |
1482 | |
1483 | struct usb_device *usbdev_lookup_minor(int minor) | |
1484 | { | |
1485 | struct class_device *class_dev; | |
1486 | struct usb_device *dev = NULL; | |
1487 | ||
1488 | down(&usb_device_class->sem); | |
1489 | list_for_each_entry(class_dev, &usb_device_class->children, node) { | |
1490 | if (class_dev->devt == MKDEV(USB_DEVICE_MAJOR, minor)) { | |
1491 | dev = class_dev->class_data; | |
1492 | break; | |
1493 | } | |
1494 | } | |
1495 | up(&usb_device_class->sem); | |
1496 | ||
1497 | return dev; | |
1498 | }; | |
1499 | ||
1500 | void usbdev_add(struct usb_device *dev) | |
1501 | { | |
1502 | int minor = ((dev->bus->busnum-1) * 128) + (dev->devnum-1); | |
1503 | ||
1504 | dev->class_dev = class_device_create(usb_device_class, | |
1505 | MKDEV(USB_DEVICE_MAJOR, minor), &dev->dev, | |
1506 | "usbdev%d.%d", dev->bus->busnum, dev->devnum); | |
1507 | ||
1508 | dev->class_dev->class_data = dev; | |
1509 | } | |
1510 | ||
1511 | void usbdev_remove(struct usb_device *dev) | |
1512 | { | |
1513 | class_device_unregister(dev->class_dev); | |
1514 | } | |
1515 | ||
1516 | static struct cdev usb_device_cdev = { | |
1517 | .kobj = {.name = "usb_device", }, | |
1518 | .owner = THIS_MODULE, | |
1519 | }; | |
1520 | ||
1521 | int __init usbdev_init(void) | |
1522 | { | |
1523 | int retval; | |
1524 | ||
fad21bdf AS |
1525 | retval = register_chrdev_region(USB_DEVICE_DEV, USB_DEVICE_MAX, |
1526 | "usb_device"); | |
fbf82fd2 KS |
1527 | if (retval) { |
1528 | err("unable to register minors for usb_device"); | |
1529 | goto out; | |
1530 | } | |
1531 | cdev_init(&usb_device_cdev, &usbfs_device_file_operations); | |
fad21bdf | 1532 | retval = cdev_add(&usb_device_cdev, USB_DEVICE_DEV, USB_DEVICE_MAX); |
fbf82fd2 KS |
1533 | if (retval) { |
1534 | err("unable to get usb_device major %d", USB_DEVICE_MAJOR); | |
fad21bdf | 1535 | unregister_chrdev_region(USB_DEVICE_DEV, USB_DEVICE_MAX); |
fbf82fd2 KS |
1536 | goto out; |
1537 | } | |
1538 | usb_device_class = class_create(THIS_MODULE, "usb_device"); | |
1539 | if (IS_ERR(usb_device_class)) { | |
1540 | err("unable to register usb_device class"); | |
1541 | retval = PTR_ERR(usb_device_class); | |
1542 | usb_device_class = NULL; | |
1543 | cdev_del(&usb_device_cdev); | |
fad21bdf | 1544 | unregister_chrdev_region(USB_DEVICE_DEV, USB_DEVICE_MAX); |
fbf82fd2 KS |
1545 | } |
1546 | ||
1547 | out: | |
1548 | return retval; | |
1549 | } | |
1550 | ||
1551 | void usbdev_cleanup(void) | |
1552 | { | |
1553 | class_destroy(usb_device_class); | |
1554 | cdev_del(&usb_device_cdev); | |
fad21bdf | 1555 | unregister_chrdev_region(USB_DEVICE_DEV, USB_DEVICE_MAX); |
fbf82fd2 KS |
1556 | } |
1557 |