]>
Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * dummy_hcd.c -- Dummy/Loopback USB host and device emulator driver. | |
3 | * | |
4 | * Maintainer: Alan Stern <stern@rowland.harvard.edu> | |
5 | * | |
6 | * Copyright (C) 2003 David Brownell | |
7 | * Copyright (C) 2003-2005 Alan Stern | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU General Public License as published by | |
11 | * the Free Software Foundation; either version 2 of the License, or | |
12 | * (at your option) any later version. | |
13 | * | |
14 | * This program is distributed in the hope that it will be useful, | |
15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | * GNU General Public License for more details. | |
18 | * | |
19 | * You should have received a copy of the GNU General Public License | |
20 | * along with this program; if not, write to the Free Software | |
21 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
22 | */ | |
23 | ||
24 | ||
25 | /* | |
26 | * This exposes a device side "USB gadget" API, driven by requests to a | |
27 | * Linux-USB host controller driver. USB traffic is simulated; there's | |
28 | * no need for USB hardware. Use this with two other drivers: | |
29 | * | |
30 | * - Gadget driver, responding to requests (slave); | |
31 | * - Host-side device driver, as already familiar in Linux. | |
32 | * | |
33 | * Having this all in one kernel can help some stages of development, | |
34 | * bypassing some hardware (and driver) issues. UML could help too. | |
35 | */ | |
36 | ||
37 | #define DEBUG | |
38 | ||
39 | #include <linux/config.h> | |
40 | #include <linux/module.h> | |
41 | #include <linux/kernel.h> | |
42 | #include <linux/delay.h> | |
43 | #include <linux/ioport.h> | |
44 | #include <linux/sched.h> | |
45 | #include <linux/slab.h> | |
46 | #include <linux/smp_lock.h> | |
47 | #include <linux/errno.h> | |
48 | #include <linux/init.h> | |
49 | #include <linux/timer.h> | |
50 | #include <linux/list.h> | |
51 | #include <linux/interrupt.h> | |
52 | #include <linux/version.h> | |
53 | ||
54 | #include <linux/usb.h> | |
55 | #include <linux/usb_gadget.h> | |
56 | ||
57 | #include <asm/byteorder.h> | |
58 | #include <asm/io.h> | |
59 | #include <asm/irq.h> | |
60 | #include <asm/system.h> | |
61 | #include <asm/unaligned.h> | |
62 | ||
63 | ||
64 | #include "../core/hcd.h" | |
65 | ||
66 | ||
67 | #define DRIVER_DESC "USB Host+Gadget Emulator" | |
68 | #define DRIVER_VERSION "17 Dec 2004" | |
69 | ||
70 | static const char driver_name [] = "dummy_hcd"; | |
71 | static const char driver_desc [] = "USB Host+Gadget Emulator"; | |
72 | ||
73 | static const char gadget_name [] = "dummy_udc"; | |
74 | ||
75 | MODULE_DESCRIPTION (DRIVER_DESC); | |
76 | MODULE_AUTHOR ("David Brownell"); | |
77 | MODULE_LICENSE ("GPL"); | |
78 | ||
79 | /*-------------------------------------------------------------------------*/ | |
80 | ||
81 | /* gadget side driver data structres */ | |
82 | struct dummy_ep { | |
83 | struct list_head queue; | |
84 | unsigned long last_io; /* jiffies timestamp */ | |
85 | struct usb_gadget *gadget; | |
86 | const struct usb_endpoint_descriptor *desc; | |
87 | struct usb_ep ep; | |
88 | unsigned halted : 1; | |
89 | unsigned already_seen : 1; | |
90 | unsigned setup_stage : 1; | |
91 | }; | |
92 | ||
93 | struct dummy_request { | |
94 | struct list_head queue; /* ep's requests */ | |
95 | struct usb_request req; | |
96 | }; | |
97 | ||
98 | static inline struct dummy_ep *usb_ep_to_dummy_ep (struct usb_ep *_ep) | |
99 | { | |
100 | return container_of (_ep, struct dummy_ep, ep); | |
101 | } | |
102 | ||
103 | static inline struct dummy_request *usb_request_to_dummy_request | |
104 | (struct usb_request *_req) | |
105 | { | |
106 | return container_of (_req, struct dummy_request, req); | |
107 | } | |
108 | ||
109 | /*-------------------------------------------------------------------------*/ | |
110 | ||
111 | /* | |
112 | * Every device has ep0 for control requests, plus up to 30 more endpoints, | |
113 | * in one of two types: | |
114 | * | |
115 | * - Configurable: direction (in/out), type (bulk, iso, etc), and endpoint | |
116 | * number can be changed. Names like "ep-a" are used for this type. | |
117 | * | |
118 | * - Fixed Function: in other cases. some characteristics may be mutable; | |
119 | * that'd be hardware-specific. Names like "ep12out-bulk" are used. | |
120 | * | |
121 | * Gadget drivers are responsible for not setting up conflicting endpoint | |
122 | * configurations, illegal or unsupported packet lengths, and so on. | |
123 | */ | |
124 | ||
125 | static const char ep0name [] = "ep0"; | |
126 | ||
127 | static const char *const ep_name [] = { | |
128 | ep0name, /* everyone has ep0 */ | |
129 | ||
130 | /* act like a net2280: high speed, six configurable endpoints */ | |
131 | "ep-a", "ep-b", "ep-c", "ep-d", "ep-e", "ep-f", | |
132 | ||
133 | /* or like pxa250: fifteen fixed function endpoints */ | |
134 | "ep1in-bulk", "ep2out-bulk", "ep3in-iso", "ep4out-iso", "ep5in-int", | |
135 | "ep6in-bulk", "ep7out-bulk", "ep8in-iso", "ep9out-iso", "ep10in-int", | |
136 | "ep11in-bulk", "ep12out-bulk", "ep13in-iso", "ep14out-iso", | |
137 | "ep15in-int", | |
138 | ||
139 | /* or like sa1100: two fixed function endpoints */ | |
140 | "ep1out-bulk", "ep2in-bulk", | |
141 | }; | |
142 | #define DUMMY_ENDPOINTS (sizeof(ep_name)/sizeof(char *)) | |
143 | ||
144 | #define FIFO_SIZE 64 | |
145 | ||
146 | struct urbp { | |
147 | struct urb *urb; | |
148 | struct list_head urbp_list; | |
149 | }; | |
150 | ||
151 | struct dummy { | |
152 | spinlock_t lock; | |
153 | ||
154 | /* | |
155 | * SLAVE/GADGET side support | |
156 | */ | |
157 | struct dummy_ep ep [DUMMY_ENDPOINTS]; | |
158 | int address; | |
159 | struct usb_gadget gadget; | |
160 | struct usb_gadget_driver *driver; | |
161 | struct dummy_request fifo_req; | |
162 | u8 fifo_buf [FIFO_SIZE]; | |
163 | u16 devstatus; | |
164 | ||
165 | /* | |
166 | * MASTER/HOST side support | |
167 | */ | |
168 | struct timer_list timer; | |
169 | u32 port_status; | |
170 | unsigned resuming:1; | |
171 | unsigned long re_timeout; | |
172 | ||
173 | struct usb_device *udev; | |
174 | struct list_head urbp_list; | |
175 | }; | |
176 | ||
177 | static inline struct dummy *hcd_to_dummy (struct usb_hcd *hcd) | |
178 | { | |
179 | return (struct dummy *) (hcd->hcd_priv); | |
180 | } | |
181 | ||
182 | static inline struct usb_hcd *dummy_to_hcd (struct dummy *dum) | |
183 | { | |
184 | return container_of((void *) dum, struct usb_hcd, hcd_priv); | |
185 | } | |
186 | ||
187 | static inline struct device *dummy_dev (struct dummy *dum) | |
188 | { | |
189 | return dummy_to_hcd(dum)->self.controller; | |
190 | } | |
191 | ||
192 | static inline struct dummy *ep_to_dummy (struct dummy_ep *ep) | |
193 | { | |
194 | return container_of (ep->gadget, struct dummy, gadget); | |
195 | } | |
196 | ||
197 | static inline struct dummy *gadget_to_dummy (struct usb_gadget *gadget) | |
198 | { | |
199 | return container_of (gadget, struct dummy, gadget); | |
200 | } | |
201 | ||
202 | static inline struct dummy *gadget_dev_to_dummy (struct device *dev) | |
203 | { | |
204 | return container_of (dev, struct dummy, gadget.dev); | |
205 | } | |
206 | ||
207 | static struct dummy *the_controller; | |
208 | ||
209 | /*-------------------------------------------------------------------------*/ | |
210 | ||
211 | /* | |
212 | * This "hardware" may look a bit odd in diagnostics since it's got both | |
213 | * host and device sides; and it binds different drivers to each side. | |
214 | */ | |
215 | static struct platform_device the_pdev; | |
216 | ||
217 | static struct device_driver dummy_driver = { | |
218 | .name = (char *) driver_name, | |
219 | .bus = &platform_bus_type, | |
220 | }; | |
221 | ||
222 | /*-------------------------------------------------------------------------*/ | |
223 | ||
224 | /* SLAVE/GADGET SIDE DRIVER | |
225 | * | |
226 | * This only tracks gadget state. All the work is done when the host | |
227 | * side tries some (emulated) i/o operation. Real device controller | |
228 | * drivers would do real i/o using dma, fifos, irqs, timers, etc. | |
229 | */ | |
230 | ||
231 | #define is_enabled(dum) \ | |
232 | (dum->port_status & USB_PORT_STAT_ENABLE) | |
233 | ||
234 | static int | |
235 | dummy_enable (struct usb_ep *_ep, const struct usb_endpoint_descriptor *desc) | |
236 | { | |
237 | struct dummy *dum; | |
238 | struct dummy_ep *ep; | |
239 | unsigned max; | |
240 | int retval; | |
241 | ||
242 | ep = usb_ep_to_dummy_ep (_ep); | |
243 | if (!_ep || !desc || ep->desc || _ep->name == ep0name | |
244 | || desc->bDescriptorType != USB_DT_ENDPOINT) | |
245 | return -EINVAL; | |
246 | dum = ep_to_dummy (ep); | |
247 | if (!dum->driver || !is_enabled (dum)) | |
248 | return -ESHUTDOWN; | |
249 | max = le16_to_cpu(desc->wMaxPacketSize) & 0x3ff; | |
250 | ||
251 | /* drivers must not request bad settings, since lower levels | |
252 | * (hardware or its drivers) may not check. some endpoints | |
253 | * can't do iso, many have maxpacket limitations, etc. | |
254 | * | |
255 | * since this "hardware" driver is here to help debugging, we | |
256 | * have some extra sanity checks. (there could be more though, | |
257 | * especially for "ep9out" style fixed function ones.) | |
258 | */ | |
259 | retval = -EINVAL; | |
260 | switch (desc->bmAttributes & 0x03) { | |
261 | case USB_ENDPOINT_XFER_BULK: | |
262 | if (strstr (ep->ep.name, "-iso") | |
263 | || strstr (ep->ep.name, "-int")) { | |
264 | goto done; | |
265 | } | |
266 | switch (dum->gadget.speed) { | |
267 | case USB_SPEED_HIGH: | |
268 | if (max == 512) | |
269 | break; | |
270 | /* conserve return statements */ | |
271 | default: | |
272 | switch (max) { | |
273 | case 8: case 16: case 32: case 64: | |
274 | /* we'll fake any legal size */ | |
275 | break; | |
276 | default: | |
277 | case USB_SPEED_LOW: | |
278 | goto done; | |
279 | } | |
280 | } | |
281 | break; | |
282 | case USB_ENDPOINT_XFER_INT: | |
283 | if (strstr (ep->ep.name, "-iso")) /* bulk is ok */ | |
284 | goto done; | |
285 | /* real hardware might not handle all packet sizes */ | |
286 | switch (dum->gadget.speed) { | |
287 | case USB_SPEED_HIGH: | |
288 | if (max <= 1024) | |
289 | break; | |
290 | /* save a return statement */ | |
291 | case USB_SPEED_FULL: | |
292 | if (max <= 64) | |
293 | break; | |
294 | /* save a return statement */ | |
295 | default: | |
296 | if (max <= 8) | |
297 | break; | |
298 | goto done; | |
299 | } | |
300 | break; | |
301 | case USB_ENDPOINT_XFER_ISOC: | |
302 | if (strstr (ep->ep.name, "-bulk") | |
303 | || strstr (ep->ep.name, "-int")) | |
304 | goto done; | |
305 | /* real hardware might not handle all packet sizes */ | |
306 | switch (dum->gadget.speed) { | |
307 | case USB_SPEED_HIGH: | |
308 | if (max <= 1024) | |
309 | break; | |
310 | /* save a return statement */ | |
311 | case USB_SPEED_FULL: | |
312 | if (max <= 1023) | |
313 | break; | |
314 | /* save a return statement */ | |
315 | default: | |
316 | goto done; | |
317 | } | |
318 | break; | |
319 | default: | |
320 | /* few chips support control except on ep0 */ | |
321 | goto done; | |
322 | } | |
323 | ||
324 | _ep->maxpacket = max; | |
325 | ep->desc = desc; | |
326 | ||
327 | dev_dbg (dummy_dev(dum), "enabled %s (ep%d%s-%s) maxpacket %d\n", | |
328 | _ep->name, | |
329 | desc->bEndpointAddress & 0x0f, | |
330 | (desc->bEndpointAddress & USB_DIR_IN) ? "in" : "out", | |
331 | ({ char *val; | |
332 | switch (desc->bmAttributes & 0x03) { | |
333 | case USB_ENDPOINT_XFER_BULK: val = "bulk"; break; | |
334 | case USB_ENDPOINT_XFER_ISOC: val = "iso"; break; | |
335 | case USB_ENDPOINT_XFER_INT: val = "intr"; break; | |
336 | default: val = "ctrl"; break; | |
337 | }; val; }), | |
338 | max); | |
339 | ||
340 | /* at this point real hardware should be NAKing transfers | |
341 | * to that endpoint, until a buffer is queued to it. | |
342 | */ | |
343 | retval = 0; | |
344 | done: | |
345 | return retval; | |
346 | } | |
347 | ||
348 | /* called with spinlock held */ | |
349 | static void nuke (struct dummy *dum, struct dummy_ep *ep) | |
350 | { | |
351 | while (!list_empty (&ep->queue)) { | |
352 | struct dummy_request *req; | |
353 | ||
354 | req = list_entry (ep->queue.next, struct dummy_request, queue); | |
355 | list_del_init (&req->queue); | |
356 | req->req.status = -ESHUTDOWN; | |
357 | ||
358 | spin_unlock (&dum->lock); | |
359 | req->req.complete (&ep->ep, &req->req); | |
360 | spin_lock (&dum->lock); | |
361 | } | |
362 | } | |
363 | ||
364 | static int dummy_disable (struct usb_ep *_ep) | |
365 | { | |
366 | struct dummy_ep *ep; | |
367 | struct dummy *dum; | |
368 | unsigned long flags; | |
369 | int retval; | |
370 | ||
371 | ep = usb_ep_to_dummy_ep (_ep); | |
372 | if (!_ep || !ep->desc || _ep->name == ep0name) | |
373 | return -EINVAL; | |
374 | dum = ep_to_dummy (ep); | |
375 | ||
376 | spin_lock_irqsave (&dum->lock, flags); | |
377 | ep->desc = NULL; | |
378 | retval = 0; | |
379 | nuke (dum, ep); | |
380 | spin_unlock_irqrestore (&dum->lock, flags); | |
381 | ||
382 | dev_dbg (dummy_dev(dum), "disabled %s\n", _ep->name); | |
383 | return retval; | |
384 | } | |
385 | ||
386 | static struct usb_request * | |
387 | dummy_alloc_request (struct usb_ep *_ep, int mem_flags) | |
388 | { | |
389 | struct dummy_ep *ep; | |
390 | struct dummy_request *req; | |
391 | ||
392 | if (!_ep) | |
393 | return NULL; | |
394 | ep = usb_ep_to_dummy_ep (_ep); | |
395 | ||
396 | req = kmalloc (sizeof *req, mem_flags); | |
397 | if (!req) | |
398 | return NULL; | |
399 | memset (req, 0, sizeof *req); | |
400 | INIT_LIST_HEAD (&req->queue); | |
401 | return &req->req; | |
402 | } | |
403 | ||
404 | static void | |
405 | dummy_free_request (struct usb_ep *_ep, struct usb_request *_req) | |
406 | { | |
407 | struct dummy_ep *ep; | |
408 | struct dummy_request *req; | |
409 | ||
410 | ep = usb_ep_to_dummy_ep (_ep); | |
411 | if (!ep || !_req || (!ep->desc && _ep->name != ep0name)) | |
412 | return; | |
413 | ||
414 | req = usb_request_to_dummy_request (_req); | |
415 | WARN_ON (!list_empty (&req->queue)); | |
416 | kfree (req); | |
417 | } | |
418 | ||
419 | static void * | |
420 | dummy_alloc_buffer ( | |
421 | struct usb_ep *_ep, | |
422 | unsigned bytes, | |
423 | dma_addr_t *dma, | |
424 | int mem_flags | |
425 | ) { | |
426 | char *retval; | |
427 | struct dummy_ep *ep; | |
428 | struct dummy *dum; | |
429 | ||
430 | ep = usb_ep_to_dummy_ep (_ep); | |
431 | dum = ep_to_dummy (ep); | |
432 | ||
433 | if (!dum->driver) | |
434 | return NULL; | |
435 | retval = kmalloc (bytes, mem_flags); | |
436 | *dma = (dma_addr_t) retval; | |
437 | return retval; | |
438 | } | |
439 | ||
440 | static void | |
441 | dummy_free_buffer ( | |
442 | struct usb_ep *_ep, | |
443 | void *buf, | |
444 | dma_addr_t dma, | |
445 | unsigned bytes | |
446 | ) { | |
447 | if (bytes) | |
448 | kfree (buf); | |
449 | } | |
450 | ||
451 | static void | |
452 | fifo_complete (struct usb_ep *ep, struct usb_request *req) | |
453 | { | |
454 | } | |
455 | ||
456 | static int | |
457 | dummy_queue (struct usb_ep *_ep, struct usb_request *_req, int mem_flags) | |
458 | { | |
459 | struct dummy_ep *ep; | |
460 | struct dummy_request *req; | |
461 | struct dummy *dum; | |
462 | unsigned long flags; | |
463 | ||
464 | req = usb_request_to_dummy_request (_req); | |
465 | if (!_req || !list_empty (&req->queue) || !_req->complete) | |
466 | return -EINVAL; | |
467 | ||
468 | ep = usb_ep_to_dummy_ep (_ep); | |
469 | if (!_ep || (!ep->desc && _ep->name != ep0name)) | |
470 | return -EINVAL; | |
471 | ||
472 | dum = ep_to_dummy (ep); | |
473 | if (!dum->driver || !is_enabled (dum)) | |
474 | return -ESHUTDOWN; | |
475 | ||
476 | #if 0 | |
477 | dev_dbg (dummy_dev(dum), "ep %p queue req %p to %s, len %d buf %p\n", | |
478 | ep, _req, _ep->name, _req->length, _req->buf); | |
479 | #endif | |
480 | ||
481 | _req->status = -EINPROGRESS; | |
482 | _req->actual = 0; | |
483 | spin_lock_irqsave (&dum->lock, flags); | |
484 | ||
485 | /* implement an emulated single-request FIFO */ | |
486 | if (ep->desc && (ep->desc->bEndpointAddress & USB_DIR_IN) && | |
487 | list_empty (&dum->fifo_req.queue) && | |
488 | list_empty (&ep->queue) && | |
489 | _req->length <= FIFO_SIZE) { | |
490 | req = &dum->fifo_req; | |
491 | req->req = *_req; | |
492 | req->req.buf = dum->fifo_buf; | |
493 | memcpy (dum->fifo_buf, _req->buf, _req->length); | |
494 | req->req.context = dum; | |
495 | req->req.complete = fifo_complete; | |
496 | ||
497 | spin_unlock (&dum->lock); | |
498 | _req->actual = _req->length; | |
499 | _req->status = 0; | |
500 | _req->complete (_ep, _req); | |
501 | spin_lock (&dum->lock); | |
502 | } | |
503 | list_add_tail (&req->queue, &ep->queue); | |
504 | spin_unlock_irqrestore (&dum->lock, flags); | |
505 | ||
506 | /* real hardware would likely enable transfers here, in case | |
507 | * it'd been left NAKing. | |
508 | */ | |
509 | return 0; | |
510 | } | |
511 | ||
512 | static int dummy_dequeue (struct usb_ep *_ep, struct usb_request *_req) | |
513 | { | |
514 | struct dummy_ep *ep; | |
515 | struct dummy *dum; | |
516 | int retval = -EINVAL; | |
517 | unsigned long flags; | |
518 | struct dummy_request *req = NULL; | |
519 | ||
520 | if (!_ep || !_req) | |
521 | return retval; | |
522 | ep = usb_ep_to_dummy_ep (_ep); | |
523 | dum = ep_to_dummy (ep); | |
524 | ||
525 | if (!dum->driver) | |
526 | return -ESHUTDOWN; | |
527 | ||
528 | spin_lock_irqsave (&dum->lock, flags); | |
529 | list_for_each_entry (req, &ep->queue, queue) { | |
530 | if (&req->req == _req) { | |
531 | list_del_init (&req->queue); | |
532 | _req->status = -ECONNRESET; | |
533 | retval = 0; | |
534 | break; | |
535 | } | |
536 | } | |
537 | spin_unlock_irqrestore (&dum->lock, flags); | |
538 | ||
539 | if (retval == 0) { | |
540 | dev_dbg (dummy_dev(dum), | |
541 | "dequeued req %p from %s, len %d buf %p\n", | |
542 | req, _ep->name, _req->length, _req->buf); | |
543 | _req->complete (_ep, _req); | |
544 | } | |
545 | return retval; | |
546 | } | |
547 | ||
548 | static int | |
549 | dummy_set_halt (struct usb_ep *_ep, int value) | |
550 | { | |
551 | struct dummy_ep *ep; | |
552 | struct dummy *dum; | |
553 | ||
554 | if (!_ep) | |
555 | return -EINVAL; | |
556 | ep = usb_ep_to_dummy_ep (_ep); | |
557 | dum = ep_to_dummy (ep); | |
558 | if (!dum->driver) | |
559 | return -ESHUTDOWN; | |
560 | if (!value) | |
561 | ep->halted = 0; | |
562 | else if (ep->desc && (ep->desc->bEndpointAddress & USB_DIR_IN) && | |
563 | !list_empty (&ep->queue)) | |
564 | return -EAGAIN; | |
565 | else | |
566 | ep->halted = 1; | |
567 | /* FIXME clear emulated data toggle too */ | |
568 | return 0; | |
569 | } | |
570 | ||
571 | static const struct usb_ep_ops dummy_ep_ops = { | |
572 | .enable = dummy_enable, | |
573 | .disable = dummy_disable, | |
574 | ||
575 | .alloc_request = dummy_alloc_request, | |
576 | .free_request = dummy_free_request, | |
577 | ||
578 | .alloc_buffer = dummy_alloc_buffer, | |
579 | .free_buffer = dummy_free_buffer, | |
580 | /* map, unmap, ... eventually hook the "generic" dma calls */ | |
581 | ||
582 | .queue = dummy_queue, | |
583 | .dequeue = dummy_dequeue, | |
584 | ||
585 | .set_halt = dummy_set_halt, | |
586 | }; | |
587 | ||
588 | /*-------------------------------------------------------------------------*/ | |
589 | ||
590 | /* there are both host and device side versions of this call ... */ | |
591 | static int dummy_g_get_frame (struct usb_gadget *_gadget) | |
592 | { | |
593 | struct timeval tv; | |
594 | ||
595 | do_gettimeofday (&tv); | |
596 | return tv.tv_usec / 1000; | |
597 | } | |
598 | ||
599 | static int dummy_wakeup (struct usb_gadget *_gadget) | |
600 | { | |
601 | struct dummy *dum; | |
602 | ||
603 | dum = gadget_to_dummy (_gadget); | |
604 | if ((dum->devstatus & (1 << USB_DEVICE_REMOTE_WAKEUP)) == 0 | |
605 | || !(dum->port_status & (1 << USB_PORT_FEAT_SUSPEND))) | |
606 | return -EINVAL; | |
607 | ||
608 | /* hub notices our request, issues downstream resume, etc */ | |
609 | dum->resuming = 1; | |
610 | dum->port_status |= (1 << USB_PORT_FEAT_C_SUSPEND); | |
611 | return 0; | |
612 | } | |
613 | ||
614 | static int dummy_set_selfpowered (struct usb_gadget *_gadget, int value) | |
615 | { | |
616 | struct dummy *dum; | |
617 | ||
618 | dum = gadget_to_dummy (_gadget); | |
619 | if (value) | |
620 | dum->devstatus |= (1 << USB_DEVICE_SELF_POWERED); | |
621 | else | |
622 | dum->devstatus &= ~(1 << USB_DEVICE_SELF_POWERED); | |
623 | return 0; | |
624 | } | |
625 | ||
626 | static const struct usb_gadget_ops dummy_ops = { | |
627 | .get_frame = dummy_g_get_frame, | |
628 | .wakeup = dummy_wakeup, | |
629 | .set_selfpowered = dummy_set_selfpowered, | |
630 | }; | |
631 | ||
632 | /*-------------------------------------------------------------------------*/ | |
633 | ||
634 | /* "function" sysfs attribute */ | |
635 | static ssize_t | |
636 | show_function (struct device *dev, char *buf) | |
637 | { | |
638 | struct dummy *dum = gadget_dev_to_dummy (dev); | |
639 | ||
640 | if (!dum->driver || !dum->driver->function) | |
641 | return 0; | |
642 | return scnprintf (buf, PAGE_SIZE, "%s\n", dum->driver->function); | |
643 | } | |
644 | DEVICE_ATTR (function, S_IRUGO, show_function, NULL); | |
645 | ||
646 | /*-------------------------------------------------------------------------*/ | |
647 | ||
648 | /* | |
649 | * Driver registration/unregistration. | |
650 | * | |
651 | * This is basically hardware-specific; there's usually only one real USB | |
652 | * device (not host) controller since that's how USB devices are intended | |
653 | * to work. So most implementations of these api calls will rely on the | |
654 | * fact that only one driver will ever bind to the hardware. But curious | |
655 | * hardware can be built with discrete components, so the gadget API doesn't | |
656 | * require that assumption. | |
657 | * | |
658 | * For this emulator, it might be convenient to create a usb slave device | |
659 | * for each driver that registers: just add to a big root hub. | |
660 | */ | |
661 | ||
662 | static void | |
663 | dummy_udc_release (struct device *dev) | |
664 | { | |
665 | } | |
666 | ||
667 | static void | |
668 | dummy_pdev_release (struct device *dev) | |
669 | { | |
670 | } | |
671 | ||
672 | static int | |
673 | dummy_register_udc (struct dummy *dum) | |
674 | { | |
675 | int rc; | |
676 | ||
677 | strcpy (dum->gadget.dev.bus_id, "udc"); | |
678 | dum->gadget.dev.parent = dummy_dev(dum); | |
679 | dum->gadget.dev.release = dummy_udc_release; | |
680 | ||
681 | rc = device_register (&dum->gadget.dev); | |
682 | if (rc == 0) | |
683 | device_create_file (&dum->gadget.dev, &dev_attr_function); | |
684 | return rc; | |
685 | } | |
686 | ||
687 | static void | |
688 | dummy_unregister_udc (struct dummy *dum) | |
689 | { | |
690 | device_remove_file (&dum->gadget.dev, &dev_attr_function); | |
691 | device_unregister (&dum->gadget.dev); | |
692 | } | |
693 | ||
694 | int | |
695 | usb_gadget_register_driver (struct usb_gadget_driver *driver) | |
696 | { | |
697 | struct dummy *dum = the_controller; | |
698 | int retval, i; | |
699 | ||
700 | if (!dum) | |
701 | return -EINVAL; | |
702 | if (dum->driver) | |
703 | return -EBUSY; | |
704 | if (!driver->bind || !driver->unbind || !driver->setup | |
705 | || driver->speed == USB_SPEED_UNKNOWN) | |
706 | return -EINVAL; | |
707 | ||
708 | /* | |
709 | * SLAVE side init ... the layer above hardware, which | |
710 | * can't enumerate without help from the driver we're binding. | |
711 | */ | |
712 | dum->gadget.name = gadget_name; | |
713 | dum->gadget.ops = &dummy_ops; | |
714 | dum->gadget.is_dualspeed = 1; | |
715 | ||
716 | dum->devstatus = 0; | |
717 | dum->resuming = 0; | |
718 | ||
719 | INIT_LIST_HEAD (&dum->gadget.ep_list); | |
720 | for (i = 0; i < DUMMY_ENDPOINTS; i++) { | |
721 | struct dummy_ep *ep = &dum->ep [i]; | |
722 | ||
723 | if (!ep_name [i]) | |
724 | break; | |
725 | ep->ep.name = ep_name [i]; | |
726 | ep->ep.ops = &dummy_ep_ops; | |
727 | list_add_tail (&ep->ep.ep_list, &dum->gadget.ep_list); | |
728 | ep->halted = ep->already_seen = ep->setup_stage = 0; | |
729 | ep->ep.maxpacket = ~0; | |
730 | ep->last_io = jiffies; | |
731 | ep->gadget = &dum->gadget; | |
732 | ep->desc = NULL; | |
733 | INIT_LIST_HEAD (&ep->queue); | |
734 | } | |
735 | ||
736 | dum->gadget.ep0 = &dum->ep [0].ep; | |
737 | dum->ep [0].ep.maxpacket = 64; | |
738 | list_del_init (&dum->ep [0].ep.ep_list); | |
739 | INIT_LIST_HEAD(&dum->fifo_req.queue); | |
740 | ||
741 | dum->driver = driver; | |
742 | dum->gadget.dev.driver = &driver->driver; | |
743 | dev_dbg (dummy_dev(dum), "binding gadget driver '%s'\n", | |
744 | driver->driver.name); | |
745 | if ((retval = driver->bind (&dum->gadget)) != 0) { | |
746 | dum->driver = NULL; | |
747 | dum->gadget.dev.driver = NULL; | |
748 | return retval; | |
749 | } | |
750 | ||
751 | // FIXME: Check these calls for errors and re-order | |
752 | driver->driver.bus = dum->gadget.dev.parent->bus; | |
753 | driver_register (&driver->driver); | |
754 | ||
755 | device_bind_driver (&dum->gadget.dev); | |
756 | ||
757 | /* khubd will enumerate this in a while */ | |
758 | dum->port_status |= USB_PORT_STAT_CONNECTION | |
759 | | (1 << USB_PORT_FEAT_C_CONNECTION); | |
760 | return 0; | |
761 | } | |
762 | EXPORT_SYMBOL (usb_gadget_register_driver); | |
763 | ||
764 | /* caller must hold lock */ | |
765 | static void | |
766 | stop_activity (struct dummy *dum, struct usb_gadget_driver *driver) | |
767 | { | |
768 | struct dummy_ep *ep; | |
769 | ||
770 | /* prevent any more requests */ | |
771 | dum->address = 0; | |
772 | ||
773 | /* The timer is left running so that outstanding URBs can fail */ | |
774 | ||
775 | /* nuke any pending requests first, so driver i/o is quiesced */ | |
776 | list_for_each_entry (ep, &dum->gadget.ep_list, ep.ep_list) | |
777 | nuke (dum, ep); | |
778 | ||
779 | /* driver now does any non-usb quiescing necessary */ | |
780 | if (driver) { | |
781 | spin_unlock (&dum->lock); | |
782 | driver->disconnect (&dum->gadget); | |
783 | spin_lock (&dum->lock); | |
784 | } | |
785 | } | |
786 | ||
787 | int | |
788 | usb_gadget_unregister_driver (struct usb_gadget_driver *driver) | |
789 | { | |
790 | struct dummy *dum = the_controller; | |
791 | unsigned long flags; | |
792 | ||
793 | if (!dum) | |
794 | return -ENODEV; | |
795 | if (!driver || driver != dum->driver) | |
796 | return -EINVAL; | |
797 | ||
798 | dev_dbg (dummy_dev(dum), "unregister gadget driver '%s'\n", | |
799 | driver->driver.name); | |
800 | ||
801 | spin_lock_irqsave (&dum->lock, flags); | |
802 | stop_activity (dum, driver); | |
803 | dum->port_status &= ~(USB_PORT_STAT_CONNECTION | USB_PORT_STAT_ENABLE | | |
804 | USB_PORT_STAT_LOW_SPEED | USB_PORT_STAT_HIGH_SPEED); | |
805 | dum->port_status |= (1 << USB_PORT_FEAT_C_CONNECTION); | |
806 | spin_unlock_irqrestore (&dum->lock, flags); | |
807 | ||
808 | driver->unbind (&dum->gadget); | |
809 | dum->driver = NULL; | |
810 | ||
811 | device_release_driver (&dum->gadget.dev); | |
812 | ||
813 | driver_unregister (&driver->driver); | |
814 | ||
815 | return 0; | |
816 | } | |
817 | EXPORT_SYMBOL (usb_gadget_unregister_driver); | |
818 | ||
819 | #undef is_enabled | |
820 | ||
821 | int net2280_set_fifo_mode (struct usb_gadget *gadget, int mode) | |
822 | { | |
823 | return -ENOSYS; | |
824 | } | |
825 | EXPORT_SYMBOL (net2280_set_fifo_mode); | |
826 | ||
827 | /*-------------------------------------------------------------------------*/ | |
828 | ||
829 | /* MASTER/HOST SIDE DRIVER | |
830 | * | |
831 | * this uses the hcd framework to hook up to host side drivers. | |
832 | * its root hub will only have one device, otherwise it acts like | |
833 | * a normal host controller. | |
834 | * | |
835 | * when urbs are queued, they're just stuck on a list that we | |
836 | * scan in a timer callback. that callback connects writes from | |
837 | * the host with reads from the device, and so on, based on the | |
838 | * usb 2.0 rules. | |
839 | */ | |
840 | ||
841 | static int dummy_urb_enqueue ( | |
842 | struct usb_hcd *hcd, | |
843 | struct usb_host_endpoint *ep, | |
844 | struct urb *urb, | |
845 | int mem_flags | |
846 | ) { | |
847 | struct dummy *dum; | |
848 | struct urbp *urbp; | |
849 | unsigned long flags; | |
850 | ||
851 | if (!urb->transfer_buffer && urb->transfer_buffer_length) | |
852 | return -EINVAL; | |
853 | ||
854 | urbp = kmalloc (sizeof *urbp, mem_flags); | |
855 | if (!urbp) | |
856 | return -ENOMEM; | |
857 | urbp->urb = urb; | |
858 | ||
859 | dum = hcd_to_dummy (hcd); | |
860 | spin_lock_irqsave (&dum->lock, flags); | |
861 | ||
862 | if (!dum->udev) { | |
863 | dum->udev = urb->dev; | |
864 | usb_get_dev (dum->udev); | |
865 | } else if (unlikely (dum->udev != urb->dev)) | |
866 | dev_err (dummy_dev(dum), "usb_device address has changed!\n"); | |
867 | ||
868 | list_add_tail (&urbp->urbp_list, &dum->urbp_list); | |
869 | urb->hcpriv = urbp; | |
870 | if (usb_pipetype (urb->pipe) == PIPE_CONTROL) | |
871 | urb->error_count = 1; /* mark as a new urb */ | |
872 | ||
873 | /* kick the scheduler, it'll do the rest */ | |
874 | if (!timer_pending (&dum->timer)) | |
875 | mod_timer (&dum->timer, jiffies + 1); | |
876 | ||
877 | spin_unlock_irqrestore (&dum->lock, flags); | |
878 | return 0; | |
879 | } | |
880 | ||
881 | static int dummy_urb_dequeue (struct usb_hcd *hcd, struct urb *urb) | |
882 | { | |
883 | /* giveback happens automatically in timer callback */ | |
884 | return 0; | |
885 | } | |
886 | ||
887 | static void maybe_set_status (struct urb *urb, int status) | |
888 | { | |
889 | spin_lock (&urb->lock); | |
890 | if (urb->status == -EINPROGRESS) | |
891 | urb->status = status; | |
892 | spin_unlock (&urb->lock); | |
893 | } | |
894 | ||
895 | /* transfer up to a frame's worth; caller must own lock */ | |
896 | static int | |
897 | transfer (struct dummy *dum, struct urb *urb, struct dummy_ep *ep, int limit) | |
898 | { | |
899 | struct dummy_request *req; | |
900 | ||
901 | top: | |
902 | /* if there's no request queued, the device is NAKing; return */ | |
903 | list_for_each_entry (req, &ep->queue, queue) { | |
904 | unsigned host_len, dev_len, len; | |
905 | int is_short, to_host; | |
906 | int rescan = 0; | |
907 | ||
908 | /* 1..N packets of ep->ep.maxpacket each ... the last one | |
909 | * may be short (including zero length). | |
910 | * | |
911 | * writer can send a zlp explicitly (length 0) or implicitly | |
912 | * (length mod maxpacket zero, and 'zero' flag); they always | |
913 | * terminate reads. | |
914 | */ | |
915 | host_len = urb->transfer_buffer_length - urb->actual_length; | |
916 | dev_len = req->req.length - req->req.actual; | |
917 | len = min (host_len, dev_len); | |
918 | ||
919 | /* FIXME update emulated data toggle too */ | |
920 | ||
921 | to_host = usb_pipein (urb->pipe); | |
922 | if (unlikely (len == 0)) | |
923 | is_short = 1; | |
924 | else { | |
925 | char *ubuf, *rbuf; | |
926 | ||
927 | /* not enough bandwidth left? */ | |
928 | if (limit < ep->ep.maxpacket && limit < len) | |
929 | break; | |
930 | len = min (len, (unsigned) limit); | |
931 | if (len == 0) | |
932 | break; | |
933 | ||
934 | /* use an extra pass for the final short packet */ | |
935 | if (len > ep->ep.maxpacket) { | |
936 | rescan = 1; | |
937 | len -= (len % ep->ep.maxpacket); | |
938 | } | |
939 | is_short = (len % ep->ep.maxpacket) != 0; | |
940 | ||
941 | /* else transfer packet(s) */ | |
942 | ubuf = urb->transfer_buffer + urb->actual_length; | |
943 | rbuf = req->req.buf + req->req.actual; | |
944 | if (to_host) | |
945 | memcpy (ubuf, rbuf, len); | |
946 | else | |
947 | memcpy (rbuf, ubuf, len); | |
948 | ep->last_io = jiffies; | |
949 | ||
950 | limit -= len; | |
951 | urb->actual_length += len; | |
952 | req->req.actual += len; | |
953 | } | |
954 | ||
955 | /* short packets terminate, maybe with overflow/underflow. | |
956 | * it's only really an error to write too much. | |
957 | * | |
958 | * partially filling a buffer optionally blocks queue advances | |
959 | * (so completion handlers can clean up the queue) but we don't | |
960 | * need to emulate such data-in-flight. so we only show part | |
961 | * of the URB_SHORT_NOT_OK effect: completion status. | |
962 | */ | |
963 | if (is_short) { | |
964 | if (host_len == dev_len) { | |
965 | req->req.status = 0; | |
966 | maybe_set_status (urb, 0); | |
967 | } else if (to_host) { | |
968 | req->req.status = 0; | |
969 | if (dev_len > host_len) | |
970 | maybe_set_status (urb, -EOVERFLOW); | |
971 | else | |
972 | maybe_set_status (urb, | |
973 | (urb->transfer_flags | |
974 | & URB_SHORT_NOT_OK) | |
975 | ? -EREMOTEIO : 0); | |
976 | } else if (!to_host) { | |
977 | maybe_set_status (urb, 0); | |
978 | if (host_len > dev_len) | |
979 | req->req.status = -EOVERFLOW; | |
980 | else | |
981 | req->req.status = 0; | |
982 | } | |
983 | ||
984 | /* many requests terminate without a short packet */ | |
985 | } else { | |
986 | if (req->req.length == req->req.actual | |
987 | && !req->req.zero) | |
988 | req->req.status = 0; | |
989 | if (urb->transfer_buffer_length == urb->actual_length | |
990 | && !(urb->transfer_flags | |
991 | & URB_ZERO_PACKET)) { | |
992 | maybe_set_status (urb, 0); | |
993 | } | |
994 | } | |
995 | ||
996 | /* device side completion --> continuable */ | |
997 | if (req->req.status != -EINPROGRESS) { | |
998 | list_del_init (&req->queue); | |
999 | ||
1000 | spin_unlock (&dum->lock); | |
1001 | req->req.complete (&ep->ep, &req->req); | |
1002 | spin_lock (&dum->lock); | |
1003 | ||
1004 | /* requests might have been unlinked... */ | |
1005 | rescan = 1; | |
1006 | } | |
1007 | ||
1008 | /* host side completion --> terminate */ | |
1009 | if (urb->status != -EINPROGRESS) | |
1010 | break; | |
1011 | ||
1012 | /* rescan to continue with any other queued i/o */ | |
1013 | if (rescan) | |
1014 | goto top; | |
1015 | } | |
1016 | return limit; | |
1017 | } | |
1018 | ||
1019 | static int periodic_bytes (struct dummy *dum, struct dummy_ep *ep) | |
1020 | { | |
1021 | int limit = ep->ep.maxpacket; | |
1022 | ||
1023 | if (dum->gadget.speed == USB_SPEED_HIGH) { | |
1024 | int tmp; | |
1025 | ||
1026 | /* high bandwidth mode */ | |
1027 | tmp = le16_to_cpu(ep->desc->wMaxPacketSize); | |
1028 | tmp = le16_to_cpu (tmp); | |
1029 | tmp = (tmp >> 11) & 0x03; | |
1030 | tmp *= 8 /* applies to entire frame */; | |
1031 | limit += limit * tmp; | |
1032 | } | |
1033 | return limit; | |
1034 | } | |
1035 | ||
1036 | #define is_active(dum) ((dum->port_status & \ | |
1037 | (USB_PORT_STAT_CONNECTION | USB_PORT_STAT_ENABLE | \ | |
1038 | USB_PORT_STAT_SUSPEND)) \ | |
1039 | == (USB_PORT_STAT_CONNECTION | USB_PORT_STAT_ENABLE)) | |
1040 | ||
1041 | static struct dummy_ep *find_endpoint (struct dummy *dum, u8 address) | |
1042 | { | |
1043 | int i; | |
1044 | ||
1045 | if (!is_active (dum)) | |
1046 | return NULL; | |
1047 | if ((address & ~USB_DIR_IN) == 0) | |
1048 | return &dum->ep [0]; | |
1049 | for (i = 1; i < DUMMY_ENDPOINTS; i++) { | |
1050 | struct dummy_ep *ep = &dum->ep [i]; | |
1051 | ||
1052 | if (!ep->desc) | |
1053 | continue; | |
1054 | if (ep->desc->bEndpointAddress == address) | |
1055 | return ep; | |
1056 | } | |
1057 | return NULL; | |
1058 | } | |
1059 | ||
1060 | #undef is_active | |
1061 | ||
1062 | #define Dev_Request (USB_TYPE_STANDARD | USB_RECIP_DEVICE) | |
1063 | #define Dev_InRequest (Dev_Request | USB_DIR_IN) | |
1064 | #define Intf_Request (USB_TYPE_STANDARD | USB_RECIP_INTERFACE) | |
1065 | #define Intf_InRequest (Intf_Request | USB_DIR_IN) | |
1066 | #define Ep_Request (USB_TYPE_STANDARD | USB_RECIP_ENDPOINT) | |
1067 | #define Ep_InRequest (Ep_Request | USB_DIR_IN) | |
1068 | ||
1069 | /* drive both sides of the transfers; looks like irq handlers to | |
1070 | * both drivers except the callbacks aren't in_irq(). | |
1071 | */ | |
1072 | static void dummy_timer (unsigned long _dum) | |
1073 | { | |
1074 | struct dummy *dum = (struct dummy *) _dum; | |
1075 | struct urbp *urbp, *tmp; | |
1076 | unsigned long flags; | |
1077 | int limit, total; | |
1078 | int i; | |
1079 | ||
1080 | /* simplistic model for one frame's bandwidth */ | |
1081 | switch (dum->gadget.speed) { | |
1082 | case USB_SPEED_LOW: | |
1083 | total = 8/*bytes*/ * 12/*packets*/; | |
1084 | break; | |
1085 | case USB_SPEED_FULL: | |
1086 | total = 64/*bytes*/ * 19/*packets*/; | |
1087 | break; | |
1088 | case USB_SPEED_HIGH: | |
1089 | total = 512/*bytes*/ * 13/*packets*/ * 8/*uframes*/; | |
1090 | break; | |
1091 | default: | |
1092 | dev_err (dummy_dev(dum), "bogus device speed\n"); | |
1093 | return; | |
1094 | } | |
1095 | ||
1096 | /* FIXME if HZ != 1000 this will probably misbehave ... */ | |
1097 | ||
1098 | /* look at each urb queued by the host side driver */ | |
1099 | spin_lock_irqsave (&dum->lock, flags); | |
1100 | ||
1101 | if (!dum->udev) { | |
1102 | dev_err (dummy_dev(dum), | |
1103 | "timer fired with no URBs pending?\n"); | |
1104 | spin_unlock_irqrestore (&dum->lock, flags); | |
1105 | return; | |
1106 | } | |
1107 | ||
1108 | for (i = 0; i < DUMMY_ENDPOINTS; i++) { | |
1109 | if (!ep_name [i]) | |
1110 | break; | |
1111 | dum->ep [i].already_seen = 0; | |
1112 | } | |
1113 | ||
1114 | restart: | |
1115 | list_for_each_entry_safe (urbp, tmp, &dum->urbp_list, urbp_list) { | |
1116 | struct urb *urb; | |
1117 | struct dummy_request *req; | |
1118 | u8 address; | |
1119 | struct dummy_ep *ep = NULL; | |
1120 | int type; | |
1121 | ||
1122 | urb = urbp->urb; | |
1123 | if (urb->status != -EINPROGRESS) { | |
1124 | /* likely it was just unlinked */ | |
1125 | goto return_urb; | |
1126 | } | |
1127 | type = usb_pipetype (urb->pipe); | |
1128 | ||
1129 | /* used up this frame's non-periodic bandwidth? | |
1130 | * FIXME there's infinite bandwidth for control and | |
1131 | * periodic transfers ... unrealistic. | |
1132 | */ | |
1133 | if (total <= 0 && type == PIPE_BULK) | |
1134 | continue; | |
1135 | ||
1136 | /* find the gadget's ep for this request (if configured) */ | |
1137 | address = usb_pipeendpoint (urb->pipe); | |
1138 | if (usb_pipein (urb->pipe)) | |
1139 | address |= USB_DIR_IN; | |
1140 | ep = find_endpoint(dum, address); | |
1141 | if (!ep) { | |
1142 | /* set_configuration() disagreement */ | |
1143 | dev_dbg (dummy_dev(dum), | |
1144 | "no ep configured for urb %p\n", | |
1145 | urb); | |
1146 | maybe_set_status (urb, -EPROTO); | |
1147 | goto return_urb; | |
1148 | } | |
1149 | ||
1150 | if (ep->already_seen) | |
1151 | continue; | |
1152 | ep->already_seen = 1; | |
1153 | if (ep == &dum->ep [0] && urb->error_count) { | |
1154 | ep->setup_stage = 1; /* a new urb */ | |
1155 | urb->error_count = 0; | |
1156 | } | |
1157 | if (ep->halted && !ep->setup_stage) { | |
1158 | /* NOTE: must not be iso! */ | |
1159 | dev_dbg (dummy_dev(dum), "ep %s halted, urb %p\n", | |
1160 | ep->ep.name, urb); | |
1161 | maybe_set_status (urb, -EPIPE); | |
1162 | goto return_urb; | |
1163 | } | |
1164 | /* FIXME make sure both ends agree on maxpacket */ | |
1165 | ||
1166 | /* handle control requests */ | |
1167 | if (ep == &dum->ep [0] && ep->setup_stage) { | |
1168 | struct usb_ctrlrequest setup; | |
1169 | int value = 1; | |
1170 | struct dummy_ep *ep2; | |
1171 | ||
1172 | setup = *(struct usb_ctrlrequest*) urb->setup_packet; | |
1173 | le16_to_cpus (&setup.wIndex); | |
1174 | le16_to_cpus (&setup.wValue); | |
1175 | le16_to_cpus (&setup.wLength); | |
1176 | if (setup.wLength != urb->transfer_buffer_length) { | |
1177 | maybe_set_status (urb, -EOVERFLOW); | |
1178 | goto return_urb; | |
1179 | } | |
1180 | ||
1181 | /* paranoia, in case of stale queued data */ | |
1182 | list_for_each_entry (req, &ep->queue, queue) { | |
1183 | list_del_init (&req->queue); | |
1184 | req->req.status = -EOVERFLOW; | |
1185 | dev_dbg (dummy_dev(dum), "stale req = %p\n", | |
1186 | req); | |
1187 | ||
1188 | spin_unlock (&dum->lock); | |
1189 | req->req.complete (&ep->ep, &req->req); | |
1190 | spin_lock (&dum->lock); | |
1191 | ep->already_seen = 0; | |
1192 | goto restart; | |
1193 | } | |
1194 | ||
1195 | /* gadget driver never sees set_address or operations | |
1196 | * on standard feature flags. some hardware doesn't | |
1197 | * even expose them. | |
1198 | */ | |
1199 | ep->last_io = jiffies; | |
1200 | ep->setup_stage = 0; | |
1201 | ep->halted = 0; | |
1202 | switch (setup.bRequest) { | |
1203 | case USB_REQ_SET_ADDRESS: | |
1204 | if (setup.bRequestType != Dev_Request) | |
1205 | break; | |
1206 | dum->address = setup.wValue; | |
1207 | maybe_set_status (urb, 0); | |
1208 | dev_dbg (dummy_dev(dum), "set_address = %d\n", | |
1209 | setup.wValue); | |
1210 | value = 0; | |
1211 | break; | |
1212 | case USB_REQ_SET_FEATURE: | |
1213 | if (setup.bRequestType == Dev_Request) { | |
1214 | value = 0; | |
1215 | switch (setup.wValue) { | |
1216 | case USB_DEVICE_REMOTE_WAKEUP: | |
1217 | break; | |
1218 | default: | |
1219 | value = -EOPNOTSUPP; | |
1220 | } | |
1221 | if (value == 0) { | |
1222 | dum->devstatus |= | |
1223 | (1 << setup.wValue); | |
1224 | maybe_set_status (urb, 0); | |
1225 | } | |
1226 | ||
1227 | } else if (setup.bRequestType == Ep_Request) { | |
1228 | // endpoint halt | |
1229 | ep2 = find_endpoint (dum, | |
1230 | setup.wIndex); | |
1231 | if (!ep2) { | |
1232 | value = -EOPNOTSUPP; | |
1233 | break; | |
1234 | } | |
1235 | ep2->halted = 1; | |
1236 | value = 0; | |
1237 | maybe_set_status (urb, 0); | |
1238 | } | |
1239 | break; | |
1240 | case USB_REQ_CLEAR_FEATURE: | |
1241 | if (setup.bRequestType == Dev_Request) { | |
1242 | switch (setup.wValue) { | |
1243 | case USB_DEVICE_REMOTE_WAKEUP: | |
1244 | dum->devstatus &= ~(1 << | |
1245 | USB_DEVICE_REMOTE_WAKEUP); | |
1246 | value = 0; | |
1247 | maybe_set_status (urb, 0); | |
1248 | break; | |
1249 | default: | |
1250 | value = -EOPNOTSUPP; | |
1251 | break; | |
1252 | } | |
1253 | } else if (setup.bRequestType == Ep_Request) { | |
1254 | // endpoint halt | |
1255 | ep2 = find_endpoint (dum, | |
1256 | setup.wIndex); | |
1257 | if (!ep2) { | |
1258 | value = -EOPNOTSUPP; | |
1259 | break; | |
1260 | } | |
1261 | ep2->halted = 0; | |
1262 | value = 0; | |
1263 | maybe_set_status (urb, 0); | |
1264 | } | |
1265 | break; | |
1266 | case USB_REQ_GET_STATUS: | |
1267 | if (setup.bRequestType == Dev_InRequest | |
1268 | || setup.bRequestType | |
1269 | == Intf_InRequest | |
1270 | || setup.bRequestType | |
1271 | == Ep_InRequest | |
1272 | ) { | |
1273 | char *buf; | |
1274 | ||
1275 | // device: remote wakeup, selfpowered | |
1276 | // interface: nothing | |
1277 | // endpoint: halt | |
1278 | buf = (char *)urb->transfer_buffer; | |
1279 | if (urb->transfer_buffer_length > 0) { | |
1280 | if (setup.bRequestType == | |
1281 | Ep_InRequest) { | |
1282 | ep2 = find_endpoint (dum, setup.wIndex); | |
1283 | if (!ep2) { | |
1284 | value = -EOPNOTSUPP; | |
1285 | break; | |
1286 | } | |
1287 | buf [0] = ep2->halted; | |
1288 | } else if (setup.bRequestType == | |
1289 | Dev_InRequest) { | |
1290 | buf [0] = (u8) | |
1291 | dum->devstatus; | |
1292 | } else | |
1293 | buf [0] = 0; | |
1294 | } | |
1295 | if (urb->transfer_buffer_length > 1) | |
1296 | buf [1] = 0; | |
1297 | urb->actual_length = min (2, | |
1298 | urb->transfer_buffer_length); | |
1299 | value = 0; | |
1300 | maybe_set_status (urb, 0); | |
1301 | } | |
1302 | break; | |
1303 | } | |
1304 | ||
1305 | /* gadget driver handles all other requests. block | |
1306 | * until setup() returns; no reentrancy issues etc. | |
1307 | */ | |
1308 | if (value > 0) { | |
1309 | spin_unlock (&dum->lock); | |
1310 | value = dum->driver->setup (&dum->gadget, | |
1311 | &setup); | |
1312 | spin_lock (&dum->lock); | |
1313 | ||
1314 | if (value >= 0) { | |
1315 | /* no delays (max 64KB data stage) */ | |
1316 | limit = 64*1024; | |
1317 | goto treat_control_like_bulk; | |
1318 | } | |
1319 | /* error, see below */ | |
1320 | } | |
1321 | ||
1322 | if (value < 0) { | |
1323 | if (value != -EOPNOTSUPP) | |
1324 | dev_dbg (dummy_dev(dum), | |
1325 | "setup --> %d\n", | |
1326 | value); | |
1327 | maybe_set_status (urb, -EPIPE); | |
1328 | urb->actual_length = 0; | |
1329 | } | |
1330 | ||
1331 | goto return_urb; | |
1332 | } | |
1333 | ||
1334 | /* non-control requests */ | |
1335 | limit = total; | |
1336 | switch (usb_pipetype (urb->pipe)) { | |
1337 | case PIPE_ISOCHRONOUS: | |
1338 | /* FIXME is it urb->interval since the last xfer? | |
1339 | * use urb->iso_frame_desc[i]. | |
1340 | * complete whether or not ep has requests queued. | |
1341 | * report random errors, to debug drivers. | |
1342 | */ | |
1343 | limit = max (limit, periodic_bytes (dum, ep)); | |
1344 | maybe_set_status (urb, -ENOSYS); | |
1345 | break; | |
1346 | ||
1347 | case PIPE_INTERRUPT: | |
1348 | /* FIXME is it urb->interval since the last xfer? | |
1349 | * this almost certainly polls too fast. | |
1350 | */ | |
1351 | limit = max (limit, periodic_bytes (dum, ep)); | |
1352 | /* FALLTHROUGH */ | |
1353 | ||
1354 | // case PIPE_BULK: case PIPE_CONTROL: | |
1355 | default: | |
1356 | treat_control_like_bulk: | |
1357 | ep->last_io = jiffies; | |
1358 | total = transfer (dum, urb, ep, limit); | |
1359 | break; | |
1360 | } | |
1361 | ||
1362 | /* incomplete transfer? */ | |
1363 | if (urb->status == -EINPROGRESS) | |
1364 | continue; | |
1365 | ||
1366 | return_urb: | |
1367 | urb->hcpriv = NULL; | |
1368 | list_del (&urbp->urbp_list); | |
1369 | kfree (urbp); | |
1370 | if (ep) | |
1371 | ep->already_seen = ep->setup_stage = 0; | |
1372 | ||
1373 | spin_unlock (&dum->lock); | |
1374 | usb_hcd_giveback_urb (dummy_to_hcd(dum), urb, NULL); | |
1375 | spin_lock (&dum->lock); | |
1376 | ||
1377 | goto restart; | |
1378 | } | |
1379 | ||
1380 | /* want a 1 msec delay here */ | |
1381 | if (!list_empty (&dum->urbp_list)) | |
1382 | mod_timer (&dum->timer, jiffies + msecs_to_jiffies(1)); | |
1383 | else { | |
1384 | usb_put_dev (dum->udev); | |
1385 | dum->udev = NULL; | |
1386 | } | |
1387 | ||
1388 | spin_unlock_irqrestore (&dum->lock, flags); | |
1389 | } | |
1390 | ||
1391 | /*-------------------------------------------------------------------------*/ | |
1392 | ||
1393 | #define PORT_C_MASK \ | |
1394 | ((1 << USB_PORT_FEAT_C_CONNECTION) \ | |
1395 | | (1 << USB_PORT_FEAT_C_ENABLE) \ | |
1396 | | (1 << USB_PORT_FEAT_C_SUSPEND) \ | |
1397 | | (1 << USB_PORT_FEAT_C_OVER_CURRENT) \ | |
1398 | | (1 << USB_PORT_FEAT_C_RESET)) | |
1399 | ||
1400 | static int dummy_hub_status (struct usb_hcd *hcd, char *buf) | |
1401 | { | |
1402 | struct dummy *dum; | |
1403 | unsigned long flags; | |
1404 | int retval; | |
1405 | ||
1406 | dum = hcd_to_dummy (hcd); | |
1407 | ||
1408 | spin_lock_irqsave (&dum->lock, flags); | |
1409 | if (!(dum->port_status & PORT_C_MASK)) | |
1410 | retval = 0; | |
1411 | else { | |
1412 | *buf = (1 << 1); | |
1413 | dev_dbg (dummy_dev(dum), "port status 0x%08x has changes\n", | |
1414 | dum->port_status); | |
1415 | retval = 1; | |
1416 | } | |
1417 | spin_unlock_irqrestore (&dum->lock, flags); | |
1418 | return retval; | |
1419 | } | |
1420 | ||
1421 | static inline void | |
1422 | hub_descriptor (struct usb_hub_descriptor *desc) | |
1423 | { | |
1424 | memset (desc, 0, sizeof *desc); | |
1425 | desc->bDescriptorType = 0x29; | |
1426 | desc->bDescLength = 9; | |
1427 | desc->wHubCharacteristics = __constant_cpu_to_le16 (0x0001); | |
1428 | desc->bNbrPorts = 1; | |
1429 | desc->bitmap [0] = 0xff; | |
1430 | desc->bitmap [1] = 0xff; | |
1431 | } | |
1432 | ||
1433 | static int dummy_hub_control ( | |
1434 | struct usb_hcd *hcd, | |
1435 | u16 typeReq, | |
1436 | u16 wValue, | |
1437 | u16 wIndex, | |
1438 | char *buf, | |
1439 | u16 wLength | |
1440 | ) { | |
1441 | struct dummy *dum; | |
1442 | int retval = 0; | |
1443 | unsigned long flags; | |
1444 | ||
1445 | dum = hcd_to_dummy (hcd); | |
1446 | spin_lock_irqsave (&dum->lock, flags); | |
1447 | switch (typeReq) { | |
1448 | case ClearHubFeature: | |
1449 | break; | |
1450 | case ClearPortFeature: | |
1451 | switch (wValue) { | |
1452 | case USB_PORT_FEAT_SUSPEND: | |
1453 | if (dum->port_status & (1 << USB_PORT_FEAT_SUSPEND)) { | |
1454 | /* 20msec resume signaling */ | |
1455 | dum->resuming = 1; | |
1456 | dum->re_timeout = jiffies + | |
1457 | msecs_to_jiffies(20); | |
1458 | } | |
1459 | break; | |
1460 | case USB_PORT_FEAT_POWER: | |
1461 | dum->port_status = 0; | |
1462 | dum->resuming = 0; | |
1463 | stop_activity(dum, dum->driver); | |
1464 | break; | |
1465 | default: | |
1466 | dum->port_status &= ~(1 << wValue); | |
1467 | } | |
1468 | break; | |
1469 | case GetHubDescriptor: | |
1470 | hub_descriptor ((struct usb_hub_descriptor *) buf); | |
1471 | break; | |
1472 | case GetHubStatus: | |
1473 | *(u32 *) buf = __constant_cpu_to_le32 (0); | |
1474 | break; | |
1475 | case GetPortStatus: | |
1476 | if (wIndex != 1) | |
1477 | retval = -EPIPE; | |
1478 | ||
1479 | /* whoever resets or resumes must GetPortStatus to | |
1480 | * complete it!! | |
1481 | */ | |
1482 | if (dum->resuming && time_after (jiffies, dum->re_timeout)) { | |
1483 | dum->port_status |= (1 << USB_PORT_FEAT_C_SUSPEND); | |
1484 | dum->port_status &= ~(1 << USB_PORT_FEAT_SUSPEND); | |
1485 | dum->resuming = 0; | |
1486 | dum->re_timeout = 0; | |
1487 | if (dum->driver && dum->driver->resume) { | |
1488 | spin_unlock (&dum->lock); | |
1489 | dum->driver->resume (&dum->gadget); | |
1490 | spin_lock (&dum->lock); | |
1491 | } | |
1492 | } | |
1493 | if ((dum->port_status & (1 << USB_PORT_FEAT_RESET)) != 0 | |
1494 | && time_after (jiffies, dum->re_timeout)) { | |
1495 | dum->port_status |= (1 << USB_PORT_FEAT_C_RESET); | |
1496 | dum->port_status &= ~(1 << USB_PORT_FEAT_RESET); | |
1497 | dum->re_timeout = 0; | |
1498 | if (dum->driver) { | |
1499 | dum->port_status |= USB_PORT_STAT_ENABLE; | |
1500 | /* give it the best speed we agree on */ | |
1501 | dum->gadget.speed = dum->driver->speed; | |
1502 | dum->gadget.ep0->maxpacket = 64; | |
1503 | switch (dum->gadget.speed) { | |
1504 | case USB_SPEED_HIGH: | |
1505 | dum->port_status |= | |
1506 | USB_PORT_STAT_HIGH_SPEED; | |
1507 | break; | |
1508 | case USB_SPEED_LOW: | |
1509 | dum->gadget.ep0->maxpacket = 8; | |
1510 | dum->port_status |= | |
1511 | USB_PORT_STAT_LOW_SPEED; | |
1512 | break; | |
1513 | default: | |
1514 | dum->gadget.speed = USB_SPEED_FULL; | |
1515 | break; | |
1516 | } | |
1517 | } | |
1518 | } | |
1519 | ((u16 *) buf)[0] = cpu_to_le16 (dum->port_status); | |
1520 | ((u16 *) buf)[1] = cpu_to_le16 (dum->port_status >> 16); | |
1521 | break; | |
1522 | case SetHubFeature: | |
1523 | retval = -EPIPE; | |
1524 | break; | |
1525 | case SetPortFeature: | |
1526 | switch (wValue) { | |
1527 | case USB_PORT_FEAT_SUSPEND: | |
1528 | if ((dum->port_status & (1 << USB_PORT_FEAT_SUSPEND)) | |
1529 | == 0) { | |
1530 | dum->port_status |= | |
1531 | (1 << USB_PORT_FEAT_SUSPEND); | |
1532 | if (dum->driver && dum->driver->suspend) { | |
1533 | spin_unlock (&dum->lock); | |
1534 | dum->driver->suspend (&dum->gadget); | |
1535 | spin_lock (&dum->lock); | |
1536 | } | |
1537 | } | |
1538 | break; | |
1539 | case USB_PORT_FEAT_RESET: | |
1540 | /* if it's already running, disconnect first */ | |
1541 | if (dum->port_status & USB_PORT_STAT_ENABLE) { | |
1542 | dum->port_status &= ~(USB_PORT_STAT_ENABLE | |
1543 | | USB_PORT_STAT_LOW_SPEED | |
1544 | | USB_PORT_STAT_HIGH_SPEED); | |
1545 | if (dum->driver) { | |
1546 | dev_dbg (dummy_dev(dum), | |
1547 | "disconnect\n"); | |
1548 | stop_activity (dum, dum->driver); | |
1549 | } | |
1550 | ||
1551 | /* FIXME test that code path! */ | |
1552 | } | |
1553 | /* 50msec reset signaling */ | |
1554 | dum->re_timeout = jiffies + msecs_to_jiffies(50); | |
1555 | /* FALLTHROUGH */ | |
1556 | default: | |
1557 | dum->port_status |= (1 << wValue); | |
1558 | } | |
1559 | break; | |
1560 | ||
1561 | default: | |
1562 | dev_dbg (dummy_dev(dum), | |
1563 | "hub control req%04x v%04x i%04x l%d\n", | |
1564 | typeReq, wValue, wIndex, wLength); | |
1565 | ||
1566 | /* "protocol stall" on error */ | |
1567 | retval = -EPIPE; | |
1568 | } | |
1569 | spin_unlock_irqrestore (&dum->lock, flags); | |
1570 | return retval; | |
1571 | } | |
1572 | ||
1573 | ||
1574 | /*-------------------------------------------------------------------------*/ | |
1575 | ||
1576 | static inline ssize_t | |
1577 | show_urb (char *buf, size_t size, struct urb *urb) | |
1578 | { | |
1579 | int ep = usb_pipeendpoint (urb->pipe); | |
1580 | ||
1581 | return snprintf (buf, size, | |
1582 | "urb/%p %s ep%d%s%s len %d/%d\n", | |
1583 | urb, | |
1584 | ({ char *s; | |
1585 | switch (urb->dev->speed) { | |
1586 | case USB_SPEED_LOW: s = "ls"; break; | |
1587 | case USB_SPEED_FULL: s = "fs"; break; | |
1588 | case USB_SPEED_HIGH: s = "hs"; break; | |
1589 | default: s = "?"; break; | |
1590 | }; s; }), | |
1591 | ep, ep ? (usb_pipein (urb->pipe) ? "in" : "out") : "", | |
1592 | ({ char *s; \ | |
1593 | switch (usb_pipetype (urb->pipe)) { \ | |
1594 | case PIPE_CONTROL: s = ""; break; \ | |
1595 | case PIPE_BULK: s = "-bulk"; break; \ | |
1596 | case PIPE_INTERRUPT: s = "-int"; break; \ | |
1597 | default: s = "-iso"; break; \ | |
1598 | }; s;}), | |
1599 | urb->actual_length, urb->transfer_buffer_length); | |
1600 | } | |
1601 | ||
1602 | static ssize_t | |
1603 | show_urbs (struct device *dev, char *buf) | |
1604 | { | |
1605 | struct usb_hcd *hcd = dev_get_drvdata (dev); | |
1606 | struct dummy *dum = hcd_to_dummy (hcd); | |
1607 | struct urbp *urbp; | |
1608 | size_t size = 0; | |
1609 | unsigned long flags; | |
1610 | ||
1611 | spin_lock_irqsave (&dum->lock, flags); | |
1612 | list_for_each_entry (urbp, &dum->urbp_list, urbp_list) { | |
1613 | size_t temp; | |
1614 | ||
1615 | temp = show_urb (buf, PAGE_SIZE - size, urbp->urb); | |
1616 | buf += temp; | |
1617 | size += temp; | |
1618 | } | |
1619 | spin_unlock_irqrestore (&dum->lock, flags); | |
1620 | ||
1621 | return size; | |
1622 | } | |
1623 | static DEVICE_ATTR (urbs, S_IRUGO, show_urbs, NULL); | |
1624 | ||
1625 | static int dummy_start (struct usb_hcd *hcd) | |
1626 | { | |
1627 | struct dummy *dum; | |
1628 | struct usb_device *root; | |
1629 | int retval; | |
1630 | ||
1631 | dum = hcd_to_dummy (hcd); | |
1632 | ||
1633 | /* | |
1634 | * MASTER side init ... we emulate a root hub that'll only ever | |
1635 | * talk to one device (the slave side). Also appears in sysfs, | |
1636 | * just like more familiar pci-based HCDs. | |
1637 | */ | |
1638 | spin_lock_init (&dum->lock); | |
1639 | init_timer (&dum->timer); | |
1640 | dum->timer.function = dummy_timer; | |
1641 | dum->timer.data = (unsigned long) dum; | |
1642 | ||
1643 | INIT_LIST_HEAD (&dum->urbp_list); | |
1644 | ||
1645 | root = usb_alloc_dev (NULL, &hcd->self, 0); | |
1646 | if (!root) | |
1647 | return -ENOMEM; | |
1648 | ||
1649 | /* root hub enters addressed state... */ | |
1650 | hcd->state = HC_STATE_RUNNING; | |
1651 | root->speed = USB_SPEED_HIGH; | |
1652 | ||
1653 | /* ...then configured, so khubd sees us. */ | |
1654 | if ((retval = usb_hcd_register_root_hub (root, hcd)) != 0) { | |
1655 | goto err1; | |
1656 | } | |
1657 | ||
1658 | /* only show a low-power port: just 8mA */ | |
1659 | hub_set_power_budget (root, 8); | |
1660 | ||
1661 | if ((retval = dummy_register_udc (dum)) != 0) | |
1662 | goto err2; | |
1663 | ||
1664 | /* FIXME 'urbs' should be a per-device thing, maybe in usbcore */ | |
1665 | device_create_file (dummy_dev(dum), &dev_attr_urbs); | |
1666 | return 0; | |
1667 | ||
1668 | err2: | |
1669 | usb_disconnect (&hcd->self.root_hub); | |
1670 | err1: | |
1671 | usb_put_dev (root); | |
1672 | hcd->state = HC_STATE_QUIESCING; | |
1673 | return retval; | |
1674 | } | |
1675 | ||
1676 | static void dummy_stop (struct usb_hcd *hcd) | |
1677 | { | |
1678 | struct dummy *dum; | |
1679 | ||
1680 | dum = hcd_to_dummy (hcd); | |
1681 | ||
1682 | device_remove_file (dummy_dev(dum), &dev_attr_urbs); | |
1683 | ||
1684 | usb_gadget_unregister_driver (dum->driver); | |
1685 | dummy_unregister_udc (dum); | |
1686 | ||
1687 | dev_info (dummy_dev(dum), "stopped\n"); | |
1688 | } | |
1689 | ||
1690 | /*-------------------------------------------------------------------------*/ | |
1691 | ||
1692 | static int dummy_h_get_frame (struct usb_hcd *hcd) | |
1693 | { | |
1694 | return dummy_g_get_frame (NULL); | |
1695 | } | |
1696 | ||
1697 | static const struct hc_driver dummy_hcd = { | |
1698 | .description = (char *) driver_name, | |
1699 | .product_desc = "Dummy host controller", | |
1700 | .hcd_priv_size = sizeof(struct dummy), | |
1701 | ||
1702 | .flags = HCD_USB2, | |
1703 | ||
1704 | .start = dummy_start, | |
1705 | .stop = dummy_stop, | |
1706 | ||
1707 | .urb_enqueue = dummy_urb_enqueue, | |
1708 | .urb_dequeue = dummy_urb_dequeue, | |
1709 | ||
1710 | .get_frame_number = dummy_h_get_frame, | |
1711 | ||
1712 | .hub_status_data = dummy_hub_status, | |
1713 | .hub_control = dummy_hub_control, | |
1714 | }; | |
1715 | ||
1716 | static int dummy_probe (struct device *dev) | |
1717 | { | |
1718 | struct usb_hcd *hcd; | |
1719 | int retval; | |
1720 | ||
1721 | dev_info (dev, "%s, driver " DRIVER_VERSION "\n", driver_desc); | |
1722 | ||
1723 | hcd = usb_create_hcd (&dummy_hcd, dev, dev->bus_id); | |
1724 | if (!hcd) | |
1725 | return -ENOMEM; | |
1726 | the_controller = hcd_to_dummy (hcd); | |
1727 | ||
1728 | retval = usb_add_hcd(hcd, 0, 0); | |
1729 | if (retval != 0) { | |
1730 | usb_put_hcd (hcd); | |
1731 | the_controller = NULL; | |
1732 | } | |
1733 | return retval; | |
1734 | } | |
1735 | ||
1736 | static void dummy_remove (struct device *dev) | |
1737 | { | |
1738 | struct usb_hcd *hcd; | |
1739 | ||
1740 | hcd = dev_get_drvdata (dev); | |
1741 | usb_remove_hcd (hcd); | |
1742 | usb_put_hcd (hcd); | |
1743 | the_controller = NULL; | |
1744 | } | |
1745 | ||
1746 | /*-------------------------------------------------------------------------*/ | |
1747 | ||
1748 | static int dummy_pdev_detect (void) | |
1749 | { | |
1750 | int retval; | |
1751 | ||
1752 | retval = driver_register (&dummy_driver); | |
1753 | if (retval < 0) | |
1754 | return retval; | |
1755 | ||
1756 | the_pdev.name = "hc"; | |
1757 | the_pdev.dev.driver = &dummy_driver; | |
1758 | the_pdev.dev.release = dummy_pdev_release; | |
1759 | ||
1760 | retval = platform_device_register (&the_pdev); | |
1761 | if (retval < 0) | |
1762 | driver_unregister (&dummy_driver); | |
1763 | return retval; | |
1764 | } | |
1765 | ||
1766 | static void dummy_pdev_remove (void) | |
1767 | { | |
1768 | platform_device_unregister (&the_pdev); | |
1769 | driver_unregister (&dummy_driver); | |
1770 | } | |
1771 | ||
1772 | /*-------------------------------------------------------------------------*/ | |
1773 | ||
1774 | static int __init init (void) | |
1775 | { | |
1776 | int retval; | |
1777 | ||
1778 | if (usb_disabled ()) | |
1779 | return -ENODEV; | |
1780 | if ((retval = dummy_pdev_detect ()) != 0) | |
1781 | return retval; | |
1782 | if ((retval = dummy_probe (&the_pdev.dev)) != 0) | |
1783 | dummy_pdev_remove (); | |
1784 | return retval; | |
1785 | } | |
1786 | module_init (init); | |
1787 | ||
1788 | static void __exit cleanup (void) | |
1789 | { | |
1790 | dummy_remove (&the_pdev.dev); | |
1791 | dummy_pdev_remove (); | |
1792 | } | |
1793 | module_exit (cleanup); |