Commit | Line | Data |
---|---|---|
afba937e ON |
1 | /* |
2 | * cdc-wdm.c | |
3 | * | |
4 | * This driver supports USB CDC WCM Device Management. | |
5 | * | |
052fbc0d | 6 | * Copyright (c) 2007-2009 Oliver Neukum |
afba937e ON |
7 | * |
8 | * Some code taken from cdc-acm.c | |
9 | * | |
10 | * Released under the GPLv2. | |
11 | * | |
12 | * Many thanks to Carl Nordbeck | |
13 | */ | |
14 | #include <linux/kernel.h> | |
15 | #include <linux/errno.h> | |
16 | #include <linux/slab.h> | |
17 | #include <linux/module.h> | |
afba937e ON |
18 | #include <linux/mutex.h> |
19 | #include <linux/uaccess.h> | |
20 | #include <linux/bitops.h> | |
21 | #include <linux/poll.h> | |
22 | #include <linux/usb.h> | |
23 | #include <linux/usb/cdc.h> | |
24 | #include <asm/byteorder.h> | |
25 | #include <asm/unaligned.h> | |
3cc36157 | 26 | #include <linux/usb/cdc-wdm.h> |
afba937e ON |
27 | |
28 | /* | |
29 | * Version Information | |
30 | */ | |
87d65e54 | 31 | #define DRIVER_VERSION "v0.03" |
afba937e | 32 | #define DRIVER_AUTHOR "Oliver Neukum" |
87d65e54 | 33 | #define DRIVER_DESC "USB Abstract Control Model driver for USB WCM Device Management" |
afba937e | 34 | |
fec67b45 BM |
35 | #define HUAWEI_VENDOR_ID 0x12D1 |
36 | ||
6ef4852b | 37 | static const struct usb_device_id wdm_ids[] = { |
afba937e ON |
38 | { |
39 | .match_flags = USB_DEVICE_ID_MATCH_INT_CLASS | | |
40 | USB_DEVICE_ID_MATCH_INT_SUBCLASS, | |
41 | .bInterfaceClass = USB_CLASS_COMM, | |
42 | .bInterfaceSubClass = USB_CDC_SUBCLASS_DMM | |
43 | }, | |
fec67b45 BM |
44 | { |
45 | /* | |
46 | * Huawei E392, E398 and possibly other Qualcomm based modems | |
47 | * embed the Qualcomm QMI protocol inside CDC on CDC ECM like | |
48 | * control interfaces. Userspace access to this is required | |
49 | * to configure the accompanying data interface | |
50 | */ | |
51 | .match_flags = USB_DEVICE_ID_MATCH_VENDOR | | |
52 | USB_DEVICE_ID_MATCH_INT_INFO, | |
53 | .idVendor = HUAWEI_VENDOR_ID, | |
54 | .bInterfaceClass = USB_CLASS_VENDOR_SPEC, | |
55 | .bInterfaceSubClass = 1, | |
56 | .bInterfaceProtocol = 9, /* NOTE: CDC ECM control interface! */ | |
57 | }, | |
de102ef4 BM |
58 | { |
59 | /* Vodafone/Huawei K5005 (12d1:14c8) and similar modems */ | |
60 | .match_flags = USB_DEVICE_ID_MATCH_VENDOR | | |
61 | USB_DEVICE_ID_MATCH_INT_INFO, | |
62 | .idVendor = HUAWEI_VENDOR_ID, | |
63 | .bInterfaceClass = USB_CLASS_VENDOR_SPEC, | |
64 | .bInterfaceSubClass = 1, | |
65 | .bInterfaceProtocol = 57, /* NOTE: CDC ECM control interface! */ | |
66 | }, | |
afba937e ON |
67 | { } |
68 | }; | |
69 | ||
aa5380b9 ON |
70 | MODULE_DEVICE_TABLE (usb, wdm_ids); |
71 | ||
afba937e ON |
72 | #define WDM_MINOR_BASE 176 |
73 | ||
74 | ||
75 | #define WDM_IN_USE 1 | |
76 | #define WDM_DISCONNECTING 2 | |
77 | #define WDM_RESULT 3 | |
78 | #define WDM_READ 4 | |
79 | #define WDM_INT_STALL 5 | |
80 | #define WDM_POLL_RUNNING 6 | |
922a5ead | 81 | #define WDM_RESPONDING 7 |
beb1d35f | 82 | #define WDM_SUSPENDING 8 |
88044202 | 83 | #define WDM_RESETTING 9 |
afba937e ON |
84 | |
85 | #define WDM_MAX 16 | |
86 | ||
7e3054a0 BM |
87 | /* CDC-WMC r1.1 requires wMaxCommand to be "at least 256 decimal (0x100)" */ |
88 | #define WDM_DEFAULT_BUFSIZE 256 | |
afba937e ON |
89 | |
90 | static DEFINE_MUTEX(wdm_mutex); | |
b0c13860 BM |
91 | static DEFINE_SPINLOCK(wdm_device_list_lock); |
92 | static LIST_HEAD(wdm_device_list); | |
afba937e ON |
93 | |
94 | /* --- method tables --- */ | |
95 | ||
96 | struct wdm_device { | |
97 | u8 *inbuf; /* buffer for response */ | |
98 | u8 *outbuf; /* buffer for command */ | |
99 | u8 *sbuf; /* buffer for status */ | |
100 | u8 *ubuf; /* buffer for copy to user space */ | |
101 | ||
102 | struct urb *command; | |
103 | struct urb *response; | |
104 | struct urb *validity; | |
105 | struct usb_interface *intf; | |
106 | struct usb_ctrlrequest *orq; | |
107 | struct usb_ctrlrequest *irq; | |
108 | spinlock_t iuspin; | |
109 | ||
110 | unsigned long flags; | |
111 | u16 bufsize; | |
112 | u16 wMaxCommand; | |
113 | u16 wMaxPacketSize; | |
afba937e ON |
114 | __le16 inum; |
115 | int reslength; | |
116 | int length; | |
117 | int read; | |
118 | int count; | |
119 | dma_addr_t shandle; | |
120 | dma_addr_t ihandle; | |
e8537bd2 BM |
121 | struct mutex wlock; |
122 | struct mutex rlock; | |
afba937e ON |
123 | wait_queue_head_t wait; |
124 | struct work_struct rxwork; | |
125 | int werr; | |
126 | int rerr; | |
b0c13860 BM |
127 | |
128 | struct list_head device_list; | |
3cc36157 | 129 | int (*manage_power)(struct usb_interface *, int); |
afba937e ON |
130 | }; |
131 | ||
132 | static struct usb_driver wdm_driver; | |
133 | ||
b0c13860 BM |
134 | /* return intfdata if we own the interface, else look up intf in the list */ |
135 | static struct wdm_device *wdm_find_device(struct usb_interface *intf) | |
136 | { | |
137 | struct wdm_device *desc = NULL; | |
138 | ||
139 | spin_lock(&wdm_device_list_lock); | |
140 | list_for_each_entry(desc, &wdm_device_list, device_list) | |
141 | if (desc->intf == intf) | |
142 | break; | |
143 | spin_unlock(&wdm_device_list_lock); | |
144 | ||
145 | return desc; | |
146 | } | |
147 | ||
148 | static struct wdm_device *wdm_find_device_by_minor(int minor) | |
149 | { | |
150 | struct wdm_device *desc = NULL; | |
151 | ||
152 | spin_lock(&wdm_device_list_lock); | |
153 | list_for_each_entry(desc, &wdm_device_list, device_list) | |
154 | if (desc->intf->minor == minor) | |
155 | break; | |
156 | spin_unlock(&wdm_device_list_lock); | |
157 | ||
158 | return desc; | |
159 | } | |
160 | ||
afba937e ON |
161 | /* --- callbacks --- */ |
162 | static void wdm_out_callback(struct urb *urb) | |
163 | { | |
164 | struct wdm_device *desc; | |
165 | desc = urb->context; | |
166 | spin_lock(&desc->iuspin); | |
167 | desc->werr = urb->status; | |
168 | spin_unlock(&desc->iuspin); | |
afba937e | 169 | kfree(desc->outbuf); |
5c22837a ON |
170 | desc->outbuf = NULL; |
171 | clear_bit(WDM_IN_USE, &desc->flags); | |
afba937e ON |
172 | wake_up(&desc->wait); |
173 | } | |
174 | ||
175 | static void wdm_in_callback(struct urb *urb) | |
176 | { | |
177 | struct wdm_device *desc = urb->context; | |
178 | int status = urb->status; | |
179 | ||
180 | spin_lock(&desc->iuspin); | |
922a5ead | 181 | clear_bit(WDM_RESPONDING, &desc->flags); |
afba937e ON |
182 | |
183 | if (status) { | |
184 | switch (status) { | |
185 | case -ENOENT: | |
186 | dev_dbg(&desc->intf->dev, | |
187 | "nonzero urb status received: -ENOENT"); | |
922a5ead | 188 | goto skip_error; |
afba937e ON |
189 | case -ECONNRESET: |
190 | dev_dbg(&desc->intf->dev, | |
191 | "nonzero urb status received: -ECONNRESET"); | |
922a5ead | 192 | goto skip_error; |
afba937e ON |
193 | case -ESHUTDOWN: |
194 | dev_dbg(&desc->intf->dev, | |
195 | "nonzero urb status received: -ESHUTDOWN"); | |
922a5ead | 196 | goto skip_error; |
afba937e | 197 | case -EPIPE: |
9908a32e GKH |
198 | dev_err(&desc->intf->dev, |
199 | "nonzero urb status received: -EPIPE\n"); | |
afba937e ON |
200 | break; |
201 | default: | |
9908a32e GKH |
202 | dev_err(&desc->intf->dev, |
203 | "Unexpected error %d\n", status); | |
afba937e ON |
204 | break; |
205 | } | |
206 | } | |
207 | ||
208 | desc->rerr = status; | |
209 | desc->reslength = urb->actual_length; | |
210 | memmove(desc->ubuf + desc->length, desc->inbuf, desc->reslength); | |
211 | desc->length += desc->reslength; | |
922a5ead | 212 | skip_error: |
afba937e ON |
213 | wake_up(&desc->wait); |
214 | ||
215 | set_bit(WDM_READ, &desc->flags); | |
216 | spin_unlock(&desc->iuspin); | |
217 | } | |
218 | ||
219 | static void wdm_int_callback(struct urb *urb) | |
220 | { | |
221 | int rv = 0; | |
222 | int status = urb->status; | |
223 | struct wdm_device *desc; | |
afba937e ON |
224 | struct usb_cdc_notification *dr; |
225 | ||
226 | desc = urb->context; | |
afba937e ON |
227 | dr = (struct usb_cdc_notification *)desc->sbuf; |
228 | ||
229 | if (status) { | |
230 | switch (status) { | |
231 | case -ESHUTDOWN: | |
232 | case -ENOENT: | |
233 | case -ECONNRESET: | |
234 | return; /* unplug */ | |
235 | case -EPIPE: | |
236 | set_bit(WDM_INT_STALL, &desc->flags); | |
9908a32e | 237 | dev_err(&desc->intf->dev, "Stall on int endpoint\n"); |
afba937e ON |
238 | goto sw; /* halt is cleared in work */ |
239 | default: | |
9908a32e GKH |
240 | dev_err(&desc->intf->dev, |
241 | "nonzero urb status received: %d\n", status); | |
afba937e ON |
242 | break; |
243 | } | |
244 | } | |
245 | ||
246 | if (urb->actual_length < sizeof(struct usb_cdc_notification)) { | |
9908a32e GKH |
247 | dev_err(&desc->intf->dev, "wdm_int_callback - %d bytes\n", |
248 | urb->actual_length); | |
afba937e ON |
249 | goto exit; |
250 | } | |
251 | ||
252 | switch (dr->bNotificationType) { | |
253 | case USB_CDC_NOTIFY_RESPONSE_AVAILABLE: | |
254 | dev_dbg(&desc->intf->dev, | |
255 | "NOTIFY_RESPONSE_AVAILABLE received: index %d len %d", | |
256 | dr->wIndex, dr->wLength); | |
257 | break; | |
258 | ||
259 | case USB_CDC_NOTIFY_NETWORK_CONNECTION: | |
260 | ||
261 | dev_dbg(&desc->intf->dev, | |
262 | "NOTIFY_NETWORK_CONNECTION %s network", | |
263 | dr->wValue ? "connected to" : "disconnected from"); | |
264 | goto exit; | |
265 | default: | |
266 | clear_bit(WDM_POLL_RUNNING, &desc->flags); | |
9908a32e GKH |
267 | dev_err(&desc->intf->dev, |
268 | "unknown notification %d received: index %d len %d\n", | |
afba937e ON |
269 | dr->bNotificationType, dr->wIndex, dr->wLength); |
270 | goto exit; | |
271 | } | |
272 | ||
afba937e ON |
273 | spin_lock(&desc->iuspin); |
274 | clear_bit(WDM_READ, &desc->flags); | |
922a5ead | 275 | set_bit(WDM_RESPONDING, &desc->flags); |
beb1d35f ON |
276 | if (!test_bit(WDM_DISCONNECTING, &desc->flags) |
277 | && !test_bit(WDM_SUSPENDING, &desc->flags)) { | |
afba937e ON |
278 | rv = usb_submit_urb(desc->response, GFP_ATOMIC); |
279 | dev_dbg(&desc->intf->dev, "%s: usb_submit_urb %d", | |
280 | __func__, rv); | |
281 | } | |
282 | spin_unlock(&desc->iuspin); | |
283 | if (rv < 0) { | |
922a5ead | 284 | clear_bit(WDM_RESPONDING, &desc->flags); |
afba937e ON |
285 | if (rv == -EPERM) |
286 | return; | |
287 | if (rv == -ENOMEM) { | |
288 | sw: | |
289 | rv = schedule_work(&desc->rxwork); | |
290 | if (rv) | |
9908a32e GKH |
291 | dev_err(&desc->intf->dev, |
292 | "Cannot schedule work\n"); | |
afba937e ON |
293 | } |
294 | } | |
295 | exit: | |
296 | rv = usb_submit_urb(urb, GFP_ATOMIC); | |
297 | if (rv) | |
9908a32e GKH |
298 | dev_err(&desc->intf->dev, |
299 | "%s - usb_submit_urb failed with result %d\n", | |
300 | __func__, rv); | |
afba937e ON |
301 | |
302 | } | |
303 | ||
304 | static void kill_urbs(struct wdm_device *desc) | |
305 | { | |
17d80d56 | 306 | /* the order here is essential */ |
afba937e ON |
307 | usb_kill_urb(desc->command); |
308 | usb_kill_urb(desc->validity); | |
309 | usb_kill_urb(desc->response); | |
310 | } | |
311 | ||
312 | static void free_urbs(struct wdm_device *desc) | |
313 | { | |
314 | usb_free_urb(desc->validity); | |
315 | usb_free_urb(desc->response); | |
316 | usb_free_urb(desc->command); | |
317 | } | |
318 | ||
319 | static void cleanup(struct wdm_device *desc) | |
320 | { | |
8457d99c BM |
321 | kfree(desc->sbuf); |
322 | kfree(desc->inbuf); | |
afba937e ON |
323 | kfree(desc->orq); |
324 | kfree(desc->irq); | |
325 | kfree(desc->ubuf); | |
326 | free_urbs(desc); | |
327 | kfree(desc); | |
328 | } | |
329 | ||
330 | static ssize_t wdm_write | |
331 | (struct file *file, const char __user *buffer, size_t count, loff_t *ppos) | |
332 | { | |
333 | u8 *buf; | |
334 | int rv = -EMSGSIZE, r, we; | |
335 | struct wdm_device *desc = file->private_data; | |
336 | struct usb_ctrlrequest *req; | |
337 | ||
338 | if (count > desc->wMaxCommand) | |
339 | count = desc->wMaxCommand; | |
340 | ||
341 | spin_lock_irq(&desc->iuspin); | |
342 | we = desc->werr; | |
343 | desc->werr = 0; | |
344 | spin_unlock_irq(&desc->iuspin); | |
345 | if (we < 0) | |
346 | return -EIO; | |
347 | ||
5c22837a | 348 | buf = kmalloc(count, GFP_KERNEL); |
860e41a7 ON |
349 | if (!buf) { |
350 | rv = -ENOMEM; | |
351 | goto outnl; | |
352 | } | |
353 | ||
354 | r = copy_from_user(buf, buffer, count); | |
355 | if (r > 0) { | |
356 | kfree(buf); | |
357 | rv = -EFAULT; | |
358 | goto outnl; | |
359 | } | |
360 | ||
361 | /* concurrent writes and disconnect */ | |
e8537bd2 | 362 | r = mutex_lock_interruptible(&desc->wlock); |
afba937e | 363 | rv = -ERESTARTSYS; |
860e41a7 ON |
364 | if (r) { |
365 | kfree(buf); | |
afba937e | 366 | goto outnl; |
860e41a7 ON |
367 | } |
368 | ||
369 | if (test_bit(WDM_DISCONNECTING, &desc->flags)) { | |
370 | kfree(buf); | |
371 | rv = -ENODEV; | |
372 | goto outnp; | |
373 | } | |
afba937e | 374 | |
17d80d56 | 375 | r = usb_autopm_get_interface(desc->intf); |
860e41a7 ON |
376 | if (r < 0) { |
377 | kfree(buf); | |
12a98b2b | 378 | rv = usb_translate_errors(r); |
17d80d56 | 379 | goto outnp; |
860e41a7 | 380 | } |
7f1dc313 | 381 | |
0cdfb819 | 382 | if (!(file->f_flags & O_NONBLOCK)) |
7f1dc313 ON |
383 | r = wait_event_interruptible(desc->wait, !test_bit(WDM_IN_USE, |
384 | &desc->flags)); | |
385 | else | |
386 | if (test_bit(WDM_IN_USE, &desc->flags)) | |
387 | r = -EAGAIN; | |
88044202 BM |
388 | |
389 | if (test_bit(WDM_RESETTING, &desc->flags)) | |
390 | r = -EIO; | |
391 | ||
860e41a7 | 392 | if (r < 0) { |
afba937e | 393 | kfree(buf); |
12a98b2b | 394 | rv = r; |
afba937e ON |
395 | goto out; |
396 | } | |
397 | ||
398 | req = desc->orq; | |
399 | usb_fill_control_urb( | |
400 | desc->command, | |
401 | interface_to_usbdev(desc->intf), | |
402 | /* using common endpoint 0 */ | |
403 | usb_sndctrlpipe(interface_to_usbdev(desc->intf), 0), | |
404 | (unsigned char *)req, | |
405 | buf, | |
406 | count, | |
407 | wdm_out_callback, | |
408 | desc | |
409 | ); | |
410 | ||
411 | req->bRequestType = (USB_DIR_OUT | USB_TYPE_CLASS | | |
412 | USB_RECIP_INTERFACE); | |
413 | req->bRequest = USB_CDC_SEND_ENCAPSULATED_COMMAND; | |
414 | req->wValue = 0; | |
415 | req->wIndex = desc->inum; | |
416 | req->wLength = cpu_to_le16(count); | |
417 | set_bit(WDM_IN_USE, &desc->flags); | |
5c22837a | 418 | desc->outbuf = buf; |
afba937e ON |
419 | |
420 | rv = usb_submit_urb(desc->command, GFP_KERNEL); | |
421 | if (rv < 0) { | |
422 | kfree(buf); | |
5c22837a | 423 | desc->outbuf = NULL; |
afba937e | 424 | clear_bit(WDM_IN_USE, &desc->flags); |
9908a32e | 425 | dev_err(&desc->intf->dev, "Tx URB error: %d\n", rv); |
12a98b2b | 426 | rv = usb_translate_errors(rv); |
afba937e ON |
427 | } else { |
428 | dev_dbg(&desc->intf->dev, "Tx URB has been submitted index=%d", | |
429 | req->wIndex); | |
430 | } | |
431 | out: | |
17d80d56 ON |
432 | usb_autopm_put_interface(desc->intf); |
433 | outnp: | |
e8537bd2 | 434 | mutex_unlock(&desc->wlock); |
afba937e ON |
435 | outnl: |
436 | return rv < 0 ? rv : count; | |
437 | } | |
438 | ||
439 | static ssize_t wdm_read | |
440 | (struct file *file, char __user *buffer, size_t count, loff_t *ppos) | |
441 | { | |
711c68b3 | 442 | int rv, cntr; |
afba937e ON |
443 | int i = 0; |
444 | struct wdm_device *desc = file->private_data; | |
445 | ||
446 | ||
e8537bd2 | 447 | rv = mutex_lock_interruptible(&desc->rlock); /*concurrent reads */ |
afba937e ON |
448 | if (rv < 0) |
449 | return -ERESTARTSYS; | |
450 | ||
711c68b3 BH |
451 | cntr = ACCESS_ONCE(desc->length); |
452 | if (cntr == 0) { | |
afba937e ON |
453 | desc->read = 0; |
454 | retry: | |
7f1dc313 ON |
455 | if (test_bit(WDM_DISCONNECTING, &desc->flags)) { |
456 | rv = -ENODEV; | |
457 | goto err; | |
458 | } | |
afba937e | 459 | i++; |
7f1dc313 ON |
460 | if (file->f_flags & O_NONBLOCK) { |
461 | if (!test_bit(WDM_READ, &desc->flags)) { | |
462 | rv = cntr ? cntr : -EAGAIN; | |
463 | goto err; | |
464 | } | |
465 | rv = 0; | |
466 | } else { | |
467 | rv = wait_event_interruptible(desc->wait, | |
468 | test_bit(WDM_READ, &desc->flags)); | |
469 | } | |
afba937e | 470 | |
7f1dc313 | 471 | /* may have happened while we slept */ |
17d80d56 ON |
472 | if (test_bit(WDM_DISCONNECTING, &desc->flags)) { |
473 | rv = -ENODEV; | |
474 | goto err; | |
475 | } | |
88044202 BM |
476 | if (test_bit(WDM_RESETTING, &desc->flags)) { |
477 | rv = -EIO; | |
478 | goto err; | |
479 | } | |
17d80d56 | 480 | usb_mark_last_busy(interface_to_usbdev(desc->intf)); |
afba937e ON |
481 | if (rv < 0) { |
482 | rv = -ERESTARTSYS; | |
483 | goto err; | |
484 | } | |
485 | ||
486 | spin_lock_irq(&desc->iuspin); | |
487 | ||
488 | if (desc->rerr) { /* read completed, error happened */ | |
afba937e ON |
489 | desc->rerr = 0; |
490 | spin_unlock_irq(&desc->iuspin); | |
afba937e ON |
491 | rv = -EIO; |
492 | goto err; | |
493 | } | |
494 | /* | |
495 | * recheck whether we've lost the race | |
496 | * against the completion handler | |
497 | */ | |
498 | if (!test_bit(WDM_READ, &desc->flags)) { /* lost race */ | |
499 | spin_unlock_irq(&desc->iuspin); | |
500 | goto retry; | |
501 | } | |
502 | if (!desc->reslength) { /* zero length read */ | |
503 | spin_unlock_irq(&desc->iuspin); | |
504 | goto retry; | |
505 | } | |
711c68b3 | 506 | cntr = desc->length; |
afba937e ON |
507 | spin_unlock_irq(&desc->iuspin); |
508 | } | |
509 | ||
711c68b3 BH |
510 | if (cntr > count) |
511 | cntr = count; | |
afba937e ON |
512 | rv = copy_to_user(buffer, desc->ubuf, cntr); |
513 | if (rv > 0) { | |
514 | rv = -EFAULT; | |
515 | goto err; | |
516 | } | |
517 | ||
711c68b3 BH |
518 | spin_lock_irq(&desc->iuspin); |
519 | ||
afba937e ON |
520 | for (i = 0; i < desc->length - cntr; i++) |
521 | desc->ubuf[i] = desc->ubuf[i + cntr]; | |
522 | ||
523 | desc->length -= cntr; | |
87d65e54 ON |
524 | /* in case we had outstanding data */ |
525 | if (!desc->length) | |
526 | clear_bit(WDM_READ, &desc->flags); | |
711c68b3 BH |
527 | |
528 | spin_unlock_irq(&desc->iuspin); | |
529 | ||
afba937e ON |
530 | rv = cntr; |
531 | ||
532 | err: | |
e8537bd2 | 533 | mutex_unlock(&desc->rlock); |
afba937e ON |
534 | return rv; |
535 | } | |
536 | ||
537 | static int wdm_flush(struct file *file, fl_owner_t id) | |
538 | { | |
539 | struct wdm_device *desc = file->private_data; | |
540 | ||
541 | wait_event(desc->wait, !test_bit(WDM_IN_USE, &desc->flags)); | |
6b0b79d3 BM |
542 | |
543 | /* cannot dereference desc->intf if WDM_DISCONNECTING */ | |
544 | if (desc->werr < 0 && !test_bit(WDM_DISCONNECTING, &desc->flags)) | |
9908a32e GKH |
545 | dev_err(&desc->intf->dev, "Error in flush path: %d\n", |
546 | desc->werr); | |
afba937e | 547 | |
24a85bae | 548 | return usb_translate_errors(desc->werr); |
afba937e ON |
549 | } |
550 | ||
551 | static unsigned int wdm_poll(struct file *file, struct poll_table_struct *wait) | |
552 | { | |
553 | struct wdm_device *desc = file->private_data; | |
554 | unsigned long flags; | |
555 | unsigned int mask = 0; | |
556 | ||
557 | spin_lock_irqsave(&desc->iuspin, flags); | |
558 | if (test_bit(WDM_DISCONNECTING, &desc->flags)) { | |
616b6937 | 559 | mask = POLLHUP | POLLERR; |
afba937e ON |
560 | spin_unlock_irqrestore(&desc->iuspin, flags); |
561 | goto desc_out; | |
562 | } | |
563 | if (test_bit(WDM_READ, &desc->flags)) | |
564 | mask = POLLIN | POLLRDNORM; | |
565 | if (desc->rerr || desc->werr) | |
566 | mask |= POLLERR; | |
567 | if (!test_bit(WDM_IN_USE, &desc->flags)) | |
568 | mask |= POLLOUT | POLLWRNORM; | |
569 | spin_unlock_irqrestore(&desc->iuspin, flags); | |
570 | ||
571 | poll_wait(file, &desc->wait, wait); | |
572 | ||
573 | desc_out: | |
574 | return mask; | |
575 | } | |
576 | ||
577 | static int wdm_open(struct inode *inode, struct file *file) | |
578 | { | |
579 | int minor = iminor(inode); | |
580 | int rv = -ENODEV; | |
581 | struct usb_interface *intf; | |
582 | struct wdm_device *desc; | |
583 | ||
584 | mutex_lock(&wdm_mutex); | |
b0c13860 BM |
585 | desc = wdm_find_device_by_minor(minor); |
586 | if (!desc) | |
afba937e ON |
587 | goto out; |
588 | ||
b0c13860 | 589 | intf = desc->intf; |
afba937e ON |
590 | if (test_bit(WDM_DISCONNECTING, &desc->flags)) |
591 | goto out; | |
afba937e ON |
592 | file->private_data = desc; |
593 | ||
17d80d56 | 594 | rv = usb_autopm_get_interface(desc->intf); |
afba937e | 595 | if (rv < 0) { |
9908a32e | 596 | dev_err(&desc->intf->dev, "Error autopm - %d\n", rv); |
afba937e ON |
597 | goto out; |
598 | } | |
afba937e | 599 | |
e8537bd2 BM |
600 | /* using write lock to protect desc->count */ |
601 | mutex_lock(&desc->wlock); | |
17d80d56 | 602 | if (!desc->count++) { |
d771d8aa ON |
603 | desc->werr = 0; |
604 | desc->rerr = 0; | |
17d80d56 ON |
605 | rv = usb_submit_urb(desc->validity, GFP_KERNEL); |
606 | if (rv < 0) { | |
607 | desc->count--; | |
9908a32e GKH |
608 | dev_err(&desc->intf->dev, |
609 | "Error submitting int urb - %d\n", rv); | |
12a98b2b | 610 | rv = usb_translate_errors(rv); |
17d80d56 ON |
611 | } |
612 | } else { | |
613 | rv = 0; | |
614 | } | |
e8537bd2 | 615 | mutex_unlock(&desc->wlock); |
3cc36157 BM |
616 | if (desc->count == 1) |
617 | desc->manage_power(intf, 1); | |
17d80d56 | 618 | usb_autopm_put_interface(desc->intf); |
afba937e ON |
619 | out: |
620 | mutex_unlock(&wdm_mutex); | |
621 | return rv; | |
622 | } | |
623 | ||
624 | static int wdm_release(struct inode *inode, struct file *file) | |
625 | { | |
626 | struct wdm_device *desc = file->private_data; | |
627 | ||
628 | mutex_lock(&wdm_mutex); | |
e8537bd2 BM |
629 | |
630 | /* using write lock to protect desc->count */ | |
631 | mutex_lock(&desc->wlock); | |
afba937e | 632 | desc->count--; |
e8537bd2 | 633 | mutex_unlock(&desc->wlock); |
17d80d56 | 634 | |
afba937e | 635 | if (!desc->count) { |
880bca3a | 636 | if (!test_bit(WDM_DISCONNECTING, &desc->flags)) { |
6b0b79d3 BM |
637 | dev_dbg(&desc->intf->dev, "wdm_release: cleanup"); |
638 | kill_urbs(desc); | |
3cc36157 | 639 | desc->manage_power(desc->intf, 0); |
880bca3a | 640 | } else { |
6b0b79d3 BM |
641 | /* must avoid dev_printk here as desc->intf is invalid */ |
642 | pr_debug(KBUILD_MODNAME " %s: device gone - cleaning up\n", __func__); | |
2f338c8a | 643 | cleanup(desc); |
880bca3a | 644 | } |
afba937e ON |
645 | } |
646 | mutex_unlock(&wdm_mutex); | |
647 | return 0; | |
648 | } | |
649 | ||
650 | static const struct file_operations wdm_fops = { | |
651 | .owner = THIS_MODULE, | |
652 | .read = wdm_read, | |
653 | .write = wdm_write, | |
654 | .open = wdm_open, | |
655 | .flush = wdm_flush, | |
656 | .release = wdm_release, | |
6038f373 AB |
657 | .poll = wdm_poll, |
658 | .llseek = noop_llseek, | |
afba937e ON |
659 | }; |
660 | ||
661 | static struct usb_class_driver wdm_class = { | |
662 | .name = "cdc-wdm%d", | |
663 | .fops = &wdm_fops, | |
664 | .minor_base = WDM_MINOR_BASE, | |
665 | }; | |
666 | ||
667 | /* --- error handling --- */ | |
668 | static void wdm_rxwork(struct work_struct *work) | |
669 | { | |
670 | struct wdm_device *desc = container_of(work, struct wdm_device, rxwork); | |
671 | unsigned long flags; | |
672 | int rv; | |
673 | ||
674 | spin_lock_irqsave(&desc->iuspin, flags); | |
675 | if (test_bit(WDM_DISCONNECTING, &desc->flags)) { | |
676 | spin_unlock_irqrestore(&desc->iuspin, flags); | |
677 | } else { | |
678 | spin_unlock_irqrestore(&desc->iuspin, flags); | |
679 | rv = usb_submit_urb(desc->response, GFP_KERNEL); | |
680 | if (rv < 0 && rv != -EPERM) { | |
681 | spin_lock_irqsave(&desc->iuspin, flags); | |
682 | if (!test_bit(WDM_DISCONNECTING, &desc->flags)) | |
683 | schedule_work(&desc->rxwork); | |
684 | spin_unlock_irqrestore(&desc->iuspin, flags); | |
685 | } | |
686 | } | |
687 | } | |
688 | ||
689 | /* --- hotplug --- */ | |
690 | ||
3cc36157 BM |
691 | static int wdm_create(struct usb_interface *intf, struct usb_endpoint_descriptor *ep, |
692 | u16 bufsize, int (*manage_power)(struct usb_interface *, int)) | |
afba937e | 693 | { |
0dffb486 | 694 | int rv = -ENOMEM; |
afba937e | 695 | struct wdm_device *desc; |
afba937e | 696 | |
afba937e ON |
697 | desc = kzalloc(sizeof(struct wdm_device), GFP_KERNEL); |
698 | if (!desc) | |
699 | goto out; | |
b0c13860 | 700 | INIT_LIST_HEAD(&desc->device_list); |
e8537bd2 BM |
701 | mutex_init(&desc->rlock); |
702 | mutex_init(&desc->wlock); | |
afba937e ON |
703 | spin_lock_init(&desc->iuspin); |
704 | init_waitqueue_head(&desc->wait); | |
0dffb486 | 705 | desc->wMaxCommand = bufsize; |
052fbc0d | 706 | /* this will be expanded and needed in hardware endianness */ |
afba937e ON |
707 | desc->inum = cpu_to_le16((u16)intf->cur_altsetting->desc.bInterfaceNumber); |
708 | desc->intf = intf; | |
709 | INIT_WORK(&desc->rxwork, wdm_rxwork); | |
710 | ||
052fbc0d | 711 | rv = -EINVAL; |
0dffb486 | 712 | if (!usb_endpoint_is_int_in(ep)) |
afba937e | 713 | goto err; |
afba937e | 714 | |
29cc8897 | 715 | desc->wMaxPacketSize = usb_endpoint_maxp(ep); |
afba937e ON |
716 | |
717 | desc->orq = kmalloc(sizeof(struct usb_ctrlrequest), GFP_KERNEL); | |
718 | if (!desc->orq) | |
719 | goto err; | |
720 | desc->irq = kmalloc(sizeof(struct usb_ctrlrequest), GFP_KERNEL); | |
721 | if (!desc->irq) | |
722 | goto err; | |
723 | ||
724 | desc->validity = usb_alloc_urb(0, GFP_KERNEL); | |
725 | if (!desc->validity) | |
726 | goto err; | |
727 | ||
728 | desc->response = usb_alloc_urb(0, GFP_KERNEL); | |
729 | if (!desc->response) | |
730 | goto err; | |
731 | ||
732 | desc->command = usb_alloc_urb(0, GFP_KERNEL); | |
733 | if (!desc->command) | |
734 | goto err; | |
735 | ||
736 | desc->ubuf = kmalloc(desc->wMaxCommand, GFP_KERNEL); | |
737 | if (!desc->ubuf) | |
738 | goto err; | |
739 | ||
8457d99c | 740 | desc->sbuf = kmalloc(desc->wMaxPacketSize, GFP_KERNEL); |
afba937e ON |
741 | if (!desc->sbuf) |
742 | goto err; | |
743 | ||
8457d99c | 744 | desc->inbuf = kmalloc(desc->wMaxCommand, GFP_KERNEL); |
afba937e | 745 | if (!desc->inbuf) |
8457d99c | 746 | goto err; |
afba937e ON |
747 | |
748 | usb_fill_int_urb( | |
749 | desc->validity, | |
750 | interface_to_usbdev(intf), | |
751 | usb_rcvintpipe(interface_to_usbdev(intf), ep->bEndpointAddress), | |
752 | desc->sbuf, | |
753 | desc->wMaxPacketSize, | |
754 | wdm_int_callback, | |
755 | desc, | |
756 | ep->bInterval | |
757 | ); | |
afba937e | 758 | |
19b85b3b BM |
759 | desc->irq->bRequestType = (USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE); |
760 | desc->irq->bRequest = USB_CDC_GET_ENCAPSULATED_RESPONSE; | |
761 | desc->irq->wValue = 0; | |
762 | desc->irq->wIndex = desc->inum; | |
763 | desc->irq->wLength = cpu_to_le16(desc->wMaxCommand); | |
764 | ||
765 | usb_fill_control_urb( | |
766 | desc->response, | |
8143a896 | 767 | interface_to_usbdev(intf), |
19b85b3b BM |
768 | /* using common endpoint 0 */ |
769 | usb_rcvctrlpipe(interface_to_usbdev(desc->intf), 0), | |
770 | (unsigned char *)desc->irq, | |
771 | desc->inbuf, | |
772 | desc->wMaxCommand, | |
773 | wdm_in_callback, | |
774 | desc | |
775 | ); | |
19b85b3b | 776 | |
3cc36157 BM |
777 | desc->manage_power = manage_power; |
778 | ||
b0c13860 BM |
779 | spin_lock(&wdm_device_list_lock); |
780 | list_add(&desc->device_list, &wdm_device_list); | |
781 | spin_unlock(&wdm_device_list_lock); | |
782 | ||
afba937e | 783 | rv = usb_register_dev(intf, &wdm_class); |
afba937e | 784 | if (rv < 0) |
b0c13860 | 785 | goto err; |
052fbc0d | 786 | else |
820c629a | 787 | dev_info(&intf->dev, "%s: USB WDM device\n", dev_name(intf->usb_dev)); |
afba937e ON |
788 | out: |
789 | return rv; | |
afba937e | 790 | err: |
6286d85e BM |
791 | spin_lock(&wdm_device_list_lock); |
792 | list_del(&desc->device_list); | |
793 | spin_unlock(&wdm_device_list_lock); | |
0dffb486 BM |
794 | cleanup(desc); |
795 | return rv; | |
796 | } | |
797 | ||
3cc36157 BM |
798 | static int wdm_manage_power(struct usb_interface *intf, int on) |
799 | { | |
800 | /* need autopm_get/put here to ensure the usbcore sees the new value */ | |
801 | int rv = usb_autopm_get_interface(intf); | |
802 | if (rv < 0) | |
803 | goto err; | |
804 | ||
805 | intf->needs_remote_wakeup = on; | |
806 | usb_autopm_put_interface(intf); | |
807 | err: | |
808 | return rv; | |
809 | } | |
810 | ||
0dffb486 BM |
811 | static int wdm_probe(struct usb_interface *intf, const struct usb_device_id *id) |
812 | { | |
813 | int rv = -EINVAL; | |
814 | struct usb_host_interface *iface; | |
815 | struct usb_endpoint_descriptor *ep; | |
816 | struct usb_cdc_dmm_desc *dmhd; | |
817 | u8 *buffer = intf->altsetting->extra; | |
818 | int buflen = intf->altsetting->extralen; | |
819 | u16 maxcom = WDM_DEFAULT_BUFSIZE; | |
820 | ||
821 | if (!buffer) | |
822 | goto err; | |
823 | while (buflen > 2) { | |
824 | if (buffer[1] != USB_DT_CS_INTERFACE) { | |
825 | dev_err(&intf->dev, "skipping garbage\n"); | |
826 | goto next_desc; | |
827 | } | |
828 | ||
829 | switch (buffer[2]) { | |
830 | case USB_CDC_HEADER_TYPE: | |
831 | break; | |
832 | case USB_CDC_DMM_TYPE: | |
833 | dmhd = (struct usb_cdc_dmm_desc *)buffer; | |
834 | maxcom = le16_to_cpu(dmhd->wMaxCommand); | |
835 | dev_dbg(&intf->dev, | |
836 | "Finding maximum buffer length: %d", maxcom); | |
837 | break; | |
838 | default: | |
839 | dev_err(&intf->dev, | |
840 | "Ignoring extra header, type %d, length %d\n", | |
841 | buffer[2], buffer[0]); | |
842 | break; | |
843 | } | |
844 | next_desc: | |
845 | buflen -= buffer[0]; | |
846 | buffer += buffer[0]; | |
847 | } | |
848 | ||
849 | iface = intf->cur_altsetting; | |
850 | if (iface->desc.bNumEndpoints != 1) | |
851 | goto err; | |
852 | ep = &iface->endpoint[0].desc; | |
853 | ||
3cc36157 | 854 | rv = wdm_create(intf, ep, maxcom, &wdm_manage_power); |
0dffb486 BM |
855 | |
856 | err: | |
afba937e ON |
857 | return rv; |
858 | } | |
859 | ||
3cc36157 BM |
860 | /** |
861 | * usb_cdc_wdm_register - register a WDM subdriver | |
862 | * @intf: usb interface the subdriver will associate with | |
863 | * @ep: interrupt endpoint to monitor for notifications | |
864 | * @bufsize: maximum message size to support for read/write | |
865 | * | |
866 | * Create WDM usb class character device and associate it with intf | |
867 | * without binding, allowing another driver to manage the interface. | |
868 | * | |
869 | * The subdriver will manage the given interrupt endpoint exclusively | |
870 | * and will issue control requests referring to the given intf. It | |
871 | * will otherwise avoid interferring, and in particular not do | |
872 | * usb_set_intfdata/usb_get_intfdata on intf. | |
873 | * | |
874 | * The return value is a pointer to the subdriver's struct usb_driver. | |
875 | * The registering driver is responsible for calling this subdriver's | |
876 | * disconnect, suspend, resume, pre_reset and post_reset methods from | |
877 | * its own. | |
878 | */ | |
879 | struct usb_driver *usb_cdc_wdm_register(struct usb_interface *intf, | |
880 | struct usb_endpoint_descriptor *ep, | |
881 | int bufsize, | |
882 | int (*manage_power)(struct usb_interface *, int)) | |
883 | { | |
884 | int rv = -EINVAL; | |
885 | ||
886 | rv = wdm_create(intf, ep, bufsize, manage_power); | |
887 | if (rv < 0) | |
888 | goto err; | |
889 | ||
890 | return &wdm_driver; | |
891 | err: | |
892 | return ERR_PTR(rv); | |
893 | } | |
894 | EXPORT_SYMBOL(usb_cdc_wdm_register); | |
895 | ||
afba937e ON |
896 | static void wdm_disconnect(struct usb_interface *intf) |
897 | { | |
898 | struct wdm_device *desc; | |
899 | unsigned long flags; | |
900 | ||
901 | usb_deregister_dev(intf, &wdm_class); | |
b0c13860 | 902 | desc = wdm_find_device(intf); |
afba937e | 903 | mutex_lock(&wdm_mutex); |
afba937e ON |
904 | |
905 | /* the spinlock makes sure no new urbs are generated in the callbacks */ | |
906 | spin_lock_irqsave(&desc->iuspin, flags); | |
907 | set_bit(WDM_DISCONNECTING, &desc->flags); | |
908 | set_bit(WDM_READ, &desc->flags); | |
17d80d56 | 909 | /* to terminate pending flushes */ |
afba937e ON |
910 | clear_bit(WDM_IN_USE, &desc->flags); |
911 | spin_unlock_irqrestore(&desc->iuspin, flags); | |
62aaf24d | 912 | wake_up_all(&desc->wait); |
e8537bd2 BM |
913 | mutex_lock(&desc->rlock); |
914 | mutex_lock(&desc->wlock); | |
afba937e | 915 | kill_urbs(desc); |
d93d16e9 | 916 | cancel_work_sync(&desc->rxwork); |
e8537bd2 BM |
917 | mutex_unlock(&desc->wlock); |
918 | mutex_unlock(&desc->rlock); | |
6286d85e BM |
919 | |
920 | /* the desc->intf pointer used as list key is now invalid */ | |
921 | spin_lock(&wdm_device_list_lock); | |
922 | list_del(&desc->device_list); | |
923 | spin_unlock(&wdm_device_list_lock); | |
924 | ||
afba937e ON |
925 | if (!desc->count) |
926 | cleanup(desc); | |
880bca3a BM |
927 | else |
928 | dev_dbg(&intf->dev, "%s: %d open files - postponing cleanup\n", __func__, desc->count); | |
afba937e ON |
929 | mutex_unlock(&wdm_mutex); |
930 | } | |
931 | ||
d93d16e9 | 932 | #ifdef CONFIG_PM |
17d80d56 ON |
933 | static int wdm_suspend(struct usb_interface *intf, pm_message_t message) |
934 | { | |
b0c13860 | 935 | struct wdm_device *desc = wdm_find_device(intf); |
17d80d56 ON |
936 | int rv = 0; |
937 | ||
938 | dev_dbg(&desc->intf->dev, "wdm%d_suspend\n", intf->minor); | |
939 | ||
d93d16e9 | 940 | /* if this is an autosuspend the caller does the locking */ |
e8537bd2 BM |
941 | if (!PMSG_IS_AUTO(message)) { |
942 | mutex_lock(&desc->rlock); | |
943 | mutex_lock(&desc->wlock); | |
944 | } | |
62e66854 | 945 | spin_lock_irq(&desc->iuspin); |
d93d16e9 | 946 | |
5b1b0b81 | 947 | if (PMSG_IS_AUTO(message) && |
922a5ead ON |
948 | (test_bit(WDM_IN_USE, &desc->flags) |
949 | || test_bit(WDM_RESPONDING, &desc->flags))) { | |
62e66854 | 950 | spin_unlock_irq(&desc->iuspin); |
17d80d56 ON |
951 | rv = -EBUSY; |
952 | } else { | |
d93d16e9 | 953 | |
beb1d35f | 954 | set_bit(WDM_SUSPENDING, &desc->flags); |
62e66854 | 955 | spin_unlock_irq(&desc->iuspin); |
d93d16e9 | 956 | /* callback submits work - order is essential */ |
17d80d56 | 957 | kill_urbs(desc); |
d93d16e9 | 958 | cancel_work_sync(&desc->rxwork); |
17d80d56 | 959 | } |
e8537bd2 BM |
960 | if (!PMSG_IS_AUTO(message)) { |
961 | mutex_unlock(&desc->wlock); | |
962 | mutex_unlock(&desc->rlock); | |
963 | } | |
17d80d56 ON |
964 | |
965 | return rv; | |
966 | } | |
d93d16e9 | 967 | #endif |
17d80d56 ON |
968 | |
969 | static int recover_from_urb_loss(struct wdm_device *desc) | |
970 | { | |
971 | int rv = 0; | |
972 | ||
973 | if (desc->count) { | |
974 | rv = usb_submit_urb(desc->validity, GFP_NOIO); | |
975 | if (rv < 0) | |
9908a32e GKH |
976 | dev_err(&desc->intf->dev, |
977 | "Error resume submitting int urb - %d\n", rv); | |
17d80d56 ON |
978 | } |
979 | return rv; | |
980 | } | |
d93d16e9 ON |
981 | |
982 | #ifdef CONFIG_PM | |
17d80d56 ON |
983 | static int wdm_resume(struct usb_interface *intf) |
984 | { | |
b0c13860 | 985 | struct wdm_device *desc = wdm_find_device(intf); |
17d80d56 ON |
986 | int rv; |
987 | ||
988 | dev_dbg(&desc->intf->dev, "wdm%d_resume\n", intf->minor); | |
338124c1 | 989 | |
beb1d35f | 990 | clear_bit(WDM_SUSPENDING, &desc->flags); |
62e66854 | 991 | rv = recover_from_urb_loss(desc); |
338124c1 | 992 | |
17d80d56 ON |
993 | return rv; |
994 | } | |
d93d16e9 | 995 | #endif |
17d80d56 ON |
996 | |
997 | static int wdm_pre_reset(struct usb_interface *intf) | |
998 | { | |
b0c13860 | 999 | struct wdm_device *desc = wdm_find_device(intf); |
17d80d56 | 1000 | |
d771d8aa ON |
1001 | /* |
1002 | * we notify everybody using poll of | |
1003 | * an exceptional situation | |
1004 | * must be done before recovery lest a spontaneous | |
1005 | * message from the device is lost | |
1006 | */ | |
1007 | spin_lock_irq(&desc->iuspin); | |
88044202 BM |
1008 | set_bit(WDM_RESETTING, &desc->flags); /* inform read/write */ |
1009 | set_bit(WDM_READ, &desc->flags); /* unblock read */ | |
1010 | clear_bit(WDM_IN_USE, &desc->flags); /* unblock write */ | |
d771d8aa ON |
1011 | desc->rerr = -EINTR; |
1012 | spin_unlock_irq(&desc->iuspin); | |
1013 | wake_up_all(&desc->wait); | |
88044202 BM |
1014 | mutex_lock(&desc->rlock); |
1015 | mutex_lock(&desc->wlock); | |
1016 | kill_urbs(desc); | |
1017 | cancel_work_sync(&desc->rxwork); | |
17d80d56 ON |
1018 | return 0; |
1019 | } | |
1020 | ||
1021 | static int wdm_post_reset(struct usb_interface *intf) | |
1022 | { | |
b0c13860 | 1023 | struct wdm_device *desc = wdm_find_device(intf); |
17d80d56 ON |
1024 | int rv; |
1025 | ||
88044202 | 1026 | clear_bit(WDM_RESETTING, &desc->flags); |
17d80d56 | 1027 | rv = recover_from_urb_loss(desc); |
e8537bd2 BM |
1028 | mutex_unlock(&desc->wlock); |
1029 | mutex_unlock(&desc->rlock); | |
17d80d56 ON |
1030 | return 0; |
1031 | } | |
1032 | ||
afba937e ON |
1033 | static struct usb_driver wdm_driver = { |
1034 | .name = "cdc_wdm", | |
1035 | .probe = wdm_probe, | |
1036 | .disconnect = wdm_disconnect, | |
d93d16e9 | 1037 | #ifdef CONFIG_PM |
17d80d56 ON |
1038 | .suspend = wdm_suspend, |
1039 | .resume = wdm_resume, | |
1040 | .reset_resume = wdm_resume, | |
d93d16e9 | 1041 | #endif |
17d80d56 ON |
1042 | .pre_reset = wdm_pre_reset, |
1043 | .post_reset = wdm_post_reset, | |
afba937e | 1044 | .id_table = wdm_ids, |
17d80d56 | 1045 | .supports_autosuspend = 1, |
e1f12eb6 | 1046 | .disable_hub_initiated_lpm = 1, |
afba937e ON |
1047 | }; |
1048 | ||
65db4305 | 1049 | module_usb_driver(wdm_driver); |
afba937e ON |
1050 | |
1051 | MODULE_AUTHOR(DRIVER_AUTHOR); | |
87d65e54 | 1052 | MODULE_DESCRIPTION(DRIVER_DESC); |
afba937e | 1053 | MODULE_LICENSE("GPL"); |