Commit | Line | Data |
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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 | ||
1da177e4 LT |
37 | #include <linux/module.h> |
38 | #include <linux/kernel.h> | |
39 | #include <linux/delay.h> | |
40 | #include <linux/ioport.h> | |
1da177e4 | 41 | #include <linux/slab.h> |
1da177e4 LT |
42 | #include <linux/errno.h> |
43 | #include <linux/init.h> | |
44 | #include <linux/timer.h> | |
45 | #include <linux/list.h> | |
46 | #include <linux/interrupt.h> | |
d052d1be | 47 | #include <linux/platform_device.h> |
1da177e4 | 48 | #include <linux/usb.h> |
9454a57a | 49 | #include <linux/usb/gadget.h> |
1da177e4 LT |
50 | |
51 | #include <asm/byteorder.h> | |
52 | #include <asm/io.h> | |
53 | #include <asm/irq.h> | |
54 | #include <asm/system.h> | |
55 | #include <asm/unaligned.h> | |
56 | ||
57 | ||
58 | #include "../core/hcd.h" | |
59 | ||
60 | ||
61 | #define DRIVER_DESC "USB Host+Gadget Emulator" | |
391eca9d | 62 | #define DRIVER_VERSION "02 May 2005" |
1da177e4 LT |
63 | |
64 | static const char driver_name [] = "dummy_hcd"; | |
65 | static const char driver_desc [] = "USB Host+Gadget Emulator"; | |
66 | ||
67 | static const char gadget_name [] = "dummy_udc"; | |
68 | ||
69 | MODULE_DESCRIPTION (DRIVER_DESC); | |
70 | MODULE_AUTHOR ("David Brownell"); | |
71 | MODULE_LICENSE ("GPL"); | |
72 | ||
73 | /*-------------------------------------------------------------------------*/ | |
74 | ||
75 | /* gadget side driver data structres */ | |
76 | struct dummy_ep { | |
77 | struct list_head queue; | |
78 | unsigned long last_io; /* jiffies timestamp */ | |
79 | struct usb_gadget *gadget; | |
80 | const struct usb_endpoint_descriptor *desc; | |
81 | struct usb_ep ep; | |
82 | unsigned halted : 1; | |
83 | unsigned already_seen : 1; | |
84 | unsigned setup_stage : 1; | |
85 | }; | |
86 | ||
87 | struct dummy_request { | |
88 | struct list_head queue; /* ep's requests */ | |
89 | struct usb_request req; | |
90 | }; | |
91 | ||
92 | static inline struct dummy_ep *usb_ep_to_dummy_ep (struct usb_ep *_ep) | |
93 | { | |
94 | return container_of (_ep, struct dummy_ep, ep); | |
95 | } | |
96 | ||
97 | static inline struct dummy_request *usb_request_to_dummy_request | |
98 | (struct usb_request *_req) | |
99 | { | |
100 | return container_of (_req, struct dummy_request, req); | |
101 | } | |
102 | ||
103 | /*-------------------------------------------------------------------------*/ | |
104 | ||
105 | /* | |
106 | * Every device has ep0 for control requests, plus up to 30 more endpoints, | |
107 | * in one of two types: | |
108 | * | |
109 | * - Configurable: direction (in/out), type (bulk, iso, etc), and endpoint | |
110 | * number can be changed. Names like "ep-a" are used for this type. | |
111 | * | |
112 | * - Fixed Function: in other cases. some characteristics may be mutable; | |
113 | * that'd be hardware-specific. Names like "ep12out-bulk" are used. | |
114 | * | |
115 | * Gadget drivers are responsible for not setting up conflicting endpoint | |
116 | * configurations, illegal or unsupported packet lengths, and so on. | |
117 | */ | |
118 | ||
119 | static const char ep0name [] = "ep0"; | |
120 | ||
121 | static const char *const ep_name [] = { | |
122 | ep0name, /* everyone has ep0 */ | |
123 | ||
124 | /* act like a net2280: high speed, six configurable endpoints */ | |
125 | "ep-a", "ep-b", "ep-c", "ep-d", "ep-e", "ep-f", | |
126 | ||
127 | /* or like pxa250: fifteen fixed function endpoints */ | |
128 | "ep1in-bulk", "ep2out-bulk", "ep3in-iso", "ep4out-iso", "ep5in-int", | |
129 | "ep6in-bulk", "ep7out-bulk", "ep8in-iso", "ep9out-iso", "ep10in-int", | |
130 | "ep11in-bulk", "ep12out-bulk", "ep13in-iso", "ep14out-iso", | |
131 | "ep15in-int", | |
132 | ||
133 | /* or like sa1100: two fixed function endpoints */ | |
134 | "ep1out-bulk", "ep2in-bulk", | |
135 | }; | |
52950ed4 | 136 | #define DUMMY_ENDPOINTS ARRAY_SIZE(ep_name) |
1da177e4 | 137 | |
d9b76251 AS |
138 | /*-------------------------------------------------------------------------*/ |
139 | ||
1da177e4 LT |
140 | #define FIFO_SIZE 64 |
141 | ||
142 | struct urbp { | |
143 | struct urb *urb; | |
144 | struct list_head urbp_list; | |
145 | }; | |
146 | ||
391eca9d AS |
147 | |
148 | enum dummy_rh_state { | |
149 | DUMMY_RH_RESET, | |
150 | DUMMY_RH_SUSPENDED, | |
151 | DUMMY_RH_RUNNING | |
152 | }; | |
153 | ||
1da177e4 LT |
154 | struct dummy { |
155 | spinlock_t lock; | |
156 | ||
157 | /* | |
158 | * SLAVE/GADGET side support | |
159 | */ | |
160 | struct dummy_ep ep [DUMMY_ENDPOINTS]; | |
161 | int address; | |
162 | struct usb_gadget gadget; | |
163 | struct usb_gadget_driver *driver; | |
164 | struct dummy_request fifo_req; | |
165 | u8 fifo_buf [FIFO_SIZE]; | |
166 | u16 devstatus; | |
391eca9d | 167 | unsigned udc_suspended:1; |
f1c39fad AS |
168 | unsigned pullup:1; |
169 | unsigned active:1; | |
170 | unsigned old_active:1; | |
1da177e4 LT |
171 | |
172 | /* | |
173 | * MASTER/HOST side support | |
174 | */ | |
391eca9d | 175 | enum dummy_rh_state rh_state; |
1da177e4 LT |
176 | struct timer_list timer; |
177 | u32 port_status; | |
f1c39fad | 178 | u32 old_status; |
1da177e4 LT |
179 | unsigned resuming:1; |
180 | unsigned long re_timeout; | |
181 | ||
182 | struct usb_device *udev; | |
183 | struct list_head urbp_list; | |
184 | }; | |
185 | ||
186 | static inline struct dummy *hcd_to_dummy (struct usb_hcd *hcd) | |
187 | { | |
188 | return (struct dummy *) (hcd->hcd_priv); | |
189 | } | |
190 | ||
191 | static inline struct usb_hcd *dummy_to_hcd (struct dummy *dum) | |
192 | { | |
193 | return container_of((void *) dum, struct usb_hcd, hcd_priv); | |
194 | } | |
195 | ||
196 | static inline struct device *dummy_dev (struct dummy *dum) | |
197 | { | |
198 | return dummy_to_hcd(dum)->self.controller; | |
199 | } | |
200 | ||
d9b76251 AS |
201 | static inline struct device *udc_dev (struct dummy *dum) |
202 | { | |
203 | return dum->gadget.dev.parent; | |
204 | } | |
205 | ||
1da177e4 LT |
206 | static inline struct dummy *ep_to_dummy (struct dummy_ep *ep) |
207 | { | |
208 | return container_of (ep->gadget, struct dummy, gadget); | |
209 | } | |
210 | ||
211 | static inline struct dummy *gadget_to_dummy (struct usb_gadget *gadget) | |
212 | { | |
213 | return container_of (gadget, struct dummy, gadget); | |
214 | } | |
215 | ||
216 | static inline struct dummy *gadget_dev_to_dummy (struct device *dev) | |
217 | { | |
218 | return container_of (dev, struct dummy, gadget.dev); | |
219 | } | |
220 | ||
221 | static struct dummy *the_controller; | |
222 | ||
223 | /*-------------------------------------------------------------------------*/ | |
224 | ||
f1c39fad AS |
225 | /* SLAVE/GADGET SIDE UTILITY ROUTINES */ |
226 | ||
227 | /* called with spinlock held */ | |
228 | static void nuke (struct dummy *dum, struct dummy_ep *ep) | |
229 | { | |
230 | while (!list_empty (&ep->queue)) { | |
231 | struct dummy_request *req; | |
232 | ||
233 | req = list_entry (ep->queue.next, struct dummy_request, queue); | |
234 | list_del_init (&req->queue); | |
235 | req->req.status = -ESHUTDOWN; | |
236 | ||
237 | spin_unlock (&dum->lock); | |
238 | req->req.complete (&ep->ep, &req->req); | |
239 | spin_lock (&dum->lock); | |
240 | } | |
241 | } | |
242 | ||
243 | /* caller must hold lock */ | |
244 | static void | |
245 | stop_activity (struct dummy *dum) | |
246 | { | |
247 | struct dummy_ep *ep; | |
248 | ||
249 | /* prevent any more requests */ | |
250 | dum->address = 0; | |
251 | ||
252 | /* The timer is left running so that outstanding URBs can fail */ | |
253 | ||
254 | /* nuke any pending requests first, so driver i/o is quiesced */ | |
255 | list_for_each_entry (ep, &dum->gadget.ep_list, ep.ep_list) | |
256 | nuke (dum, ep); | |
257 | ||
258 | /* driver now does any non-usb quiescing necessary */ | |
259 | } | |
260 | ||
261 | /* caller must hold lock */ | |
262 | static void | |
263 | set_link_state (struct dummy *dum) | |
264 | { | |
265 | dum->active = 0; | |
266 | if ((dum->port_status & USB_PORT_STAT_POWER) == 0) | |
267 | dum->port_status = 0; | |
391eca9d AS |
268 | |
269 | /* UDC suspend must cause a disconnect */ | |
270 | else if (!dum->pullup || dum->udc_suspended) { | |
f1c39fad AS |
271 | dum->port_status &= ~(USB_PORT_STAT_CONNECTION | |
272 | USB_PORT_STAT_ENABLE | | |
273 | USB_PORT_STAT_LOW_SPEED | | |
274 | USB_PORT_STAT_HIGH_SPEED | | |
275 | USB_PORT_STAT_SUSPEND); | |
276 | if ((dum->old_status & USB_PORT_STAT_CONNECTION) != 0) | |
277 | dum->port_status |= (USB_PORT_STAT_C_CONNECTION << 16); | |
278 | } else { | |
279 | dum->port_status |= USB_PORT_STAT_CONNECTION; | |
280 | if ((dum->old_status & USB_PORT_STAT_CONNECTION) == 0) | |
281 | dum->port_status |= (USB_PORT_STAT_C_CONNECTION << 16); | |
282 | if ((dum->port_status & USB_PORT_STAT_ENABLE) == 0) | |
283 | dum->port_status &= ~USB_PORT_STAT_SUSPEND; | |
391eca9d AS |
284 | else if ((dum->port_status & USB_PORT_STAT_SUSPEND) == 0 && |
285 | dum->rh_state != DUMMY_RH_SUSPENDED) | |
f1c39fad AS |
286 | dum->active = 1; |
287 | } | |
288 | ||
289 | if ((dum->port_status & USB_PORT_STAT_ENABLE) == 0 || dum->active) | |
290 | dum->resuming = 0; | |
291 | ||
292 | if ((dum->port_status & USB_PORT_STAT_CONNECTION) == 0 || | |
293 | (dum->port_status & USB_PORT_STAT_RESET) != 0) { | |
294 | if ((dum->old_status & USB_PORT_STAT_CONNECTION) != 0 && | |
295 | (dum->old_status & USB_PORT_STAT_RESET) == 0 && | |
296 | dum->driver) { | |
297 | stop_activity (dum); | |
298 | spin_unlock (&dum->lock); | |
299 | dum->driver->disconnect (&dum->gadget); | |
300 | spin_lock (&dum->lock); | |
301 | } | |
302 | } else if (dum->active != dum->old_active) { | |
303 | if (dum->old_active && dum->driver->suspend) { | |
304 | spin_unlock (&dum->lock); | |
305 | dum->driver->suspend (&dum->gadget); | |
306 | spin_lock (&dum->lock); | |
307 | } else if (!dum->old_active && dum->driver->resume) { | |
308 | spin_unlock (&dum->lock); | |
309 | dum->driver->resume (&dum->gadget); | |
310 | spin_lock (&dum->lock); | |
311 | } | |
312 | } | |
313 | ||
314 | dum->old_status = dum->port_status; | |
315 | dum->old_active = dum->active; | |
316 | } | |
317 | ||
318 | /*-------------------------------------------------------------------------*/ | |
319 | ||
1da177e4 LT |
320 | /* SLAVE/GADGET SIDE DRIVER |
321 | * | |
322 | * This only tracks gadget state. All the work is done when the host | |
323 | * side tries some (emulated) i/o operation. Real device controller | |
324 | * drivers would do real i/o using dma, fifos, irqs, timers, etc. | |
325 | */ | |
326 | ||
327 | #define is_enabled(dum) \ | |
328 | (dum->port_status & USB_PORT_STAT_ENABLE) | |
329 | ||
330 | static int | |
331 | dummy_enable (struct usb_ep *_ep, const struct usb_endpoint_descriptor *desc) | |
332 | { | |
333 | struct dummy *dum; | |
334 | struct dummy_ep *ep; | |
335 | unsigned max; | |
336 | int retval; | |
337 | ||
338 | ep = usb_ep_to_dummy_ep (_ep); | |
339 | if (!_ep || !desc || ep->desc || _ep->name == ep0name | |
340 | || desc->bDescriptorType != USB_DT_ENDPOINT) | |
341 | return -EINVAL; | |
342 | dum = ep_to_dummy (ep); | |
343 | if (!dum->driver || !is_enabled (dum)) | |
344 | return -ESHUTDOWN; | |
345 | max = le16_to_cpu(desc->wMaxPacketSize) & 0x3ff; | |
346 | ||
347 | /* drivers must not request bad settings, since lower levels | |
348 | * (hardware or its drivers) may not check. some endpoints | |
349 | * can't do iso, many have maxpacket limitations, etc. | |
350 | * | |
351 | * since this "hardware" driver is here to help debugging, we | |
352 | * have some extra sanity checks. (there could be more though, | |
353 | * especially for "ep9out" style fixed function ones.) | |
354 | */ | |
355 | retval = -EINVAL; | |
356 | switch (desc->bmAttributes & 0x03) { | |
357 | case USB_ENDPOINT_XFER_BULK: | |
358 | if (strstr (ep->ep.name, "-iso") | |
359 | || strstr (ep->ep.name, "-int")) { | |
360 | goto done; | |
361 | } | |
362 | switch (dum->gadget.speed) { | |
363 | case USB_SPEED_HIGH: | |
364 | if (max == 512) | |
365 | break; | |
366 | /* conserve return statements */ | |
367 | default: | |
368 | switch (max) { | |
369 | case 8: case 16: case 32: case 64: | |
370 | /* we'll fake any legal size */ | |
371 | break; | |
372 | default: | |
373 | case USB_SPEED_LOW: | |
374 | goto done; | |
375 | } | |
376 | } | |
377 | break; | |
378 | case USB_ENDPOINT_XFER_INT: | |
379 | if (strstr (ep->ep.name, "-iso")) /* bulk is ok */ | |
380 | goto done; | |
381 | /* real hardware might not handle all packet sizes */ | |
382 | switch (dum->gadget.speed) { | |
383 | case USB_SPEED_HIGH: | |
384 | if (max <= 1024) | |
385 | break; | |
386 | /* save a return statement */ | |
387 | case USB_SPEED_FULL: | |
388 | if (max <= 64) | |
389 | break; | |
390 | /* save a return statement */ | |
391 | default: | |
392 | if (max <= 8) | |
393 | break; | |
394 | goto done; | |
395 | } | |
396 | break; | |
397 | case USB_ENDPOINT_XFER_ISOC: | |
398 | if (strstr (ep->ep.name, "-bulk") | |
399 | || strstr (ep->ep.name, "-int")) | |
400 | goto done; | |
401 | /* real hardware might not handle all packet sizes */ | |
402 | switch (dum->gadget.speed) { | |
403 | case USB_SPEED_HIGH: | |
404 | if (max <= 1024) | |
405 | break; | |
406 | /* save a return statement */ | |
407 | case USB_SPEED_FULL: | |
408 | if (max <= 1023) | |
409 | break; | |
410 | /* save a return statement */ | |
411 | default: | |
412 | goto done; | |
413 | } | |
414 | break; | |
415 | default: | |
416 | /* few chips support control except on ep0 */ | |
417 | goto done; | |
418 | } | |
419 | ||
420 | _ep->maxpacket = max; | |
421 | ep->desc = desc; | |
422 | ||
d9b76251 | 423 | dev_dbg (udc_dev(dum), "enabled %s (ep%d%s-%s) maxpacket %d\n", |
1da177e4 LT |
424 | _ep->name, |
425 | desc->bEndpointAddress & 0x0f, | |
426 | (desc->bEndpointAddress & USB_DIR_IN) ? "in" : "out", | |
427 | ({ char *val; | |
428 | switch (desc->bmAttributes & 0x03) { | |
429 | case USB_ENDPOINT_XFER_BULK: val = "bulk"; break; | |
430 | case USB_ENDPOINT_XFER_ISOC: val = "iso"; break; | |
431 | case USB_ENDPOINT_XFER_INT: val = "intr"; break; | |
432 | default: val = "ctrl"; break; | |
433 | }; val; }), | |
434 | max); | |
435 | ||
436 | /* at this point real hardware should be NAKing transfers | |
437 | * to that endpoint, until a buffer is queued to it. | |
438 | */ | |
439 | retval = 0; | |
440 | done: | |
441 | return retval; | |
442 | } | |
443 | ||
1da177e4 LT |
444 | static int dummy_disable (struct usb_ep *_ep) |
445 | { | |
446 | struct dummy_ep *ep; | |
447 | struct dummy *dum; | |
448 | unsigned long flags; | |
449 | int retval; | |
450 | ||
451 | ep = usb_ep_to_dummy_ep (_ep); | |
452 | if (!_ep || !ep->desc || _ep->name == ep0name) | |
453 | return -EINVAL; | |
454 | dum = ep_to_dummy (ep); | |
455 | ||
456 | spin_lock_irqsave (&dum->lock, flags); | |
457 | ep->desc = NULL; | |
458 | retval = 0; | |
459 | nuke (dum, ep); | |
460 | spin_unlock_irqrestore (&dum->lock, flags); | |
461 | ||
d9b76251 | 462 | dev_dbg (udc_dev(dum), "disabled %s\n", _ep->name); |
1da177e4 LT |
463 | return retval; |
464 | } | |
465 | ||
466 | static struct usb_request * | |
55016f10 | 467 | dummy_alloc_request (struct usb_ep *_ep, gfp_t mem_flags) |
1da177e4 LT |
468 | { |
469 | struct dummy_ep *ep; | |
470 | struct dummy_request *req; | |
471 | ||
472 | if (!_ep) | |
473 | return NULL; | |
474 | ep = usb_ep_to_dummy_ep (_ep); | |
475 | ||
7039f422 | 476 | req = kzalloc(sizeof(*req), mem_flags); |
1da177e4 LT |
477 | if (!req) |
478 | return NULL; | |
1da177e4 LT |
479 | INIT_LIST_HEAD (&req->queue); |
480 | return &req->req; | |
481 | } | |
482 | ||
483 | static void | |
484 | dummy_free_request (struct usb_ep *_ep, struct usb_request *_req) | |
485 | { | |
486 | struct dummy_ep *ep; | |
487 | struct dummy_request *req; | |
488 | ||
489 | ep = usb_ep_to_dummy_ep (_ep); | |
490 | if (!ep || !_req || (!ep->desc && _ep->name != ep0name)) | |
491 | return; | |
492 | ||
493 | req = usb_request_to_dummy_request (_req); | |
494 | WARN_ON (!list_empty (&req->queue)); | |
495 | kfree (req); | |
496 | } | |
497 | ||
1da177e4 LT |
498 | static void |
499 | fifo_complete (struct usb_ep *ep, struct usb_request *req) | |
500 | { | |
501 | } | |
502 | ||
503 | static int | |
5db539e4 | 504 | dummy_queue (struct usb_ep *_ep, struct usb_request *_req, |
55016f10 | 505 | gfp_t mem_flags) |
1da177e4 LT |
506 | { |
507 | struct dummy_ep *ep; | |
508 | struct dummy_request *req; | |
509 | struct dummy *dum; | |
510 | unsigned long flags; | |
511 | ||
512 | req = usb_request_to_dummy_request (_req); | |
513 | if (!_req || !list_empty (&req->queue) || !_req->complete) | |
514 | return -EINVAL; | |
515 | ||
516 | ep = usb_ep_to_dummy_ep (_ep); | |
517 | if (!_ep || (!ep->desc && _ep->name != ep0name)) | |
518 | return -EINVAL; | |
519 | ||
520 | dum = ep_to_dummy (ep); | |
521 | if (!dum->driver || !is_enabled (dum)) | |
522 | return -ESHUTDOWN; | |
523 | ||
524 | #if 0 | |
d9b76251 | 525 | dev_dbg (udc_dev(dum), "ep %p queue req %p to %s, len %d buf %p\n", |
1da177e4 LT |
526 | ep, _req, _ep->name, _req->length, _req->buf); |
527 | #endif | |
528 | ||
529 | _req->status = -EINPROGRESS; | |
530 | _req->actual = 0; | |
531 | spin_lock_irqsave (&dum->lock, flags); | |
532 | ||
533 | /* implement an emulated single-request FIFO */ | |
534 | if (ep->desc && (ep->desc->bEndpointAddress & USB_DIR_IN) && | |
535 | list_empty (&dum->fifo_req.queue) && | |
536 | list_empty (&ep->queue) && | |
537 | _req->length <= FIFO_SIZE) { | |
538 | req = &dum->fifo_req; | |
539 | req->req = *_req; | |
540 | req->req.buf = dum->fifo_buf; | |
541 | memcpy (dum->fifo_buf, _req->buf, _req->length); | |
542 | req->req.context = dum; | |
543 | req->req.complete = fifo_complete; | |
544 | ||
545 | spin_unlock (&dum->lock); | |
546 | _req->actual = _req->length; | |
547 | _req->status = 0; | |
548 | _req->complete (_ep, _req); | |
549 | spin_lock (&dum->lock); | |
550 | } | |
551 | list_add_tail (&req->queue, &ep->queue); | |
552 | spin_unlock_irqrestore (&dum->lock, flags); | |
553 | ||
554 | /* real hardware would likely enable transfers here, in case | |
555 | * it'd been left NAKing. | |
556 | */ | |
557 | return 0; | |
558 | } | |
559 | ||
560 | static int dummy_dequeue (struct usb_ep *_ep, struct usb_request *_req) | |
561 | { | |
562 | struct dummy_ep *ep; | |
563 | struct dummy *dum; | |
564 | int retval = -EINVAL; | |
565 | unsigned long flags; | |
566 | struct dummy_request *req = NULL; | |
567 | ||
568 | if (!_ep || !_req) | |
569 | return retval; | |
570 | ep = usb_ep_to_dummy_ep (_ep); | |
571 | dum = ep_to_dummy (ep); | |
572 | ||
573 | if (!dum->driver) | |
574 | return -ESHUTDOWN; | |
575 | ||
b4dbda1a AS |
576 | local_irq_save (flags); |
577 | spin_lock (&dum->lock); | |
1da177e4 LT |
578 | list_for_each_entry (req, &ep->queue, queue) { |
579 | if (&req->req == _req) { | |
580 | list_del_init (&req->queue); | |
581 | _req->status = -ECONNRESET; | |
582 | retval = 0; | |
583 | break; | |
584 | } | |
585 | } | |
b4dbda1a | 586 | spin_unlock (&dum->lock); |
1da177e4 LT |
587 | |
588 | if (retval == 0) { | |
d9b76251 | 589 | dev_dbg (udc_dev(dum), |
1da177e4 LT |
590 | "dequeued req %p from %s, len %d buf %p\n", |
591 | req, _ep->name, _req->length, _req->buf); | |
592 | _req->complete (_ep, _req); | |
593 | } | |
b4dbda1a | 594 | local_irq_restore (flags); |
1da177e4 LT |
595 | return retval; |
596 | } | |
597 | ||
598 | static int | |
599 | dummy_set_halt (struct usb_ep *_ep, int value) | |
600 | { | |
601 | struct dummy_ep *ep; | |
602 | struct dummy *dum; | |
603 | ||
604 | if (!_ep) | |
605 | return -EINVAL; | |
606 | ep = usb_ep_to_dummy_ep (_ep); | |
607 | dum = ep_to_dummy (ep); | |
608 | if (!dum->driver) | |
609 | return -ESHUTDOWN; | |
610 | if (!value) | |
611 | ep->halted = 0; | |
612 | else if (ep->desc && (ep->desc->bEndpointAddress & USB_DIR_IN) && | |
613 | !list_empty (&ep->queue)) | |
614 | return -EAGAIN; | |
615 | else | |
616 | ep->halted = 1; | |
617 | /* FIXME clear emulated data toggle too */ | |
618 | return 0; | |
619 | } | |
620 | ||
621 | static const struct usb_ep_ops dummy_ep_ops = { | |
622 | .enable = dummy_enable, | |
623 | .disable = dummy_disable, | |
624 | ||
625 | .alloc_request = dummy_alloc_request, | |
626 | .free_request = dummy_free_request, | |
627 | ||
1da177e4 LT |
628 | .queue = dummy_queue, |
629 | .dequeue = dummy_dequeue, | |
630 | ||
631 | .set_halt = dummy_set_halt, | |
632 | }; | |
633 | ||
634 | /*-------------------------------------------------------------------------*/ | |
635 | ||
636 | /* there are both host and device side versions of this call ... */ | |
637 | static int dummy_g_get_frame (struct usb_gadget *_gadget) | |
638 | { | |
639 | struct timeval tv; | |
640 | ||
641 | do_gettimeofday (&tv); | |
642 | return tv.tv_usec / 1000; | |
643 | } | |
644 | ||
645 | static int dummy_wakeup (struct usb_gadget *_gadget) | |
646 | { | |
647 | struct dummy *dum; | |
648 | ||
649 | dum = gadget_to_dummy (_gadget); | |
391eca9d | 650 | if (!(dum->devstatus & ( (1 << USB_DEVICE_B_HNP_ENABLE) |
5742b0c9 | 651 | | (1 << USB_DEVICE_REMOTE_WAKEUP)))) |
1da177e4 | 652 | return -EINVAL; |
391eca9d AS |
653 | if ((dum->port_status & USB_PORT_STAT_CONNECTION) == 0) |
654 | return -ENOLINK; | |
655 | if ((dum->port_status & USB_PORT_STAT_SUSPEND) == 0 && | |
656 | dum->rh_state != DUMMY_RH_SUSPENDED) | |
657 | return -EIO; | |
658 | ||
659 | /* FIXME: What if the root hub is suspended but the port isn't? */ | |
1da177e4 LT |
660 | |
661 | /* hub notices our request, issues downstream resume, etc */ | |
662 | dum->resuming = 1; | |
f1c39fad | 663 | dum->re_timeout = jiffies + msecs_to_jiffies(20); |
685eb93f | 664 | mod_timer (&dummy_to_hcd (dum)->rh_timer, dum->re_timeout); |
1da177e4 LT |
665 | return 0; |
666 | } | |
667 | ||
668 | static int dummy_set_selfpowered (struct usb_gadget *_gadget, int value) | |
669 | { | |
670 | struct dummy *dum; | |
671 | ||
672 | dum = gadget_to_dummy (_gadget); | |
673 | if (value) | |
674 | dum->devstatus |= (1 << USB_DEVICE_SELF_POWERED); | |
675 | else | |
676 | dum->devstatus &= ~(1 << USB_DEVICE_SELF_POWERED); | |
677 | return 0; | |
678 | } | |
679 | ||
f1c39fad AS |
680 | static int dummy_pullup (struct usb_gadget *_gadget, int value) |
681 | { | |
682 | struct dummy *dum; | |
683 | unsigned long flags; | |
684 | ||
685 | dum = gadget_to_dummy (_gadget); | |
686 | spin_lock_irqsave (&dum->lock, flags); | |
687 | dum->pullup = (value != 0); | |
688 | set_link_state (dum); | |
689 | spin_unlock_irqrestore (&dum->lock, flags); | |
685eb93f AS |
690 | |
691 | usb_hcd_poll_rh_status (dummy_to_hcd (dum)); | |
f1c39fad AS |
692 | return 0; |
693 | } | |
694 | ||
1da177e4 LT |
695 | static const struct usb_gadget_ops dummy_ops = { |
696 | .get_frame = dummy_g_get_frame, | |
697 | .wakeup = dummy_wakeup, | |
698 | .set_selfpowered = dummy_set_selfpowered, | |
f1c39fad | 699 | .pullup = dummy_pullup, |
1da177e4 LT |
700 | }; |
701 | ||
702 | /*-------------------------------------------------------------------------*/ | |
703 | ||
704 | /* "function" sysfs attribute */ | |
705 | static ssize_t | |
10523b3b | 706 | show_function (struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
707 | { |
708 | struct dummy *dum = gadget_dev_to_dummy (dev); | |
709 | ||
710 | if (!dum->driver || !dum->driver->function) | |
711 | return 0; | |
712 | return scnprintf (buf, PAGE_SIZE, "%s\n", dum->driver->function); | |
713 | } | |
cc095b0b | 714 | static DEVICE_ATTR (function, S_IRUGO, show_function, NULL); |
1da177e4 LT |
715 | |
716 | /*-------------------------------------------------------------------------*/ | |
717 | ||
718 | /* | |
719 | * Driver registration/unregistration. | |
720 | * | |
721 | * This is basically hardware-specific; there's usually only one real USB | |
722 | * device (not host) controller since that's how USB devices are intended | |
723 | * to work. So most implementations of these api calls will rely on the | |
724 | * fact that only one driver will ever bind to the hardware. But curious | |
725 | * hardware can be built with discrete components, so the gadget API doesn't | |
726 | * require that assumption. | |
727 | * | |
728 | * For this emulator, it might be convenient to create a usb slave device | |
729 | * for each driver that registers: just add to a big root hub. | |
730 | */ | |
731 | ||
1da177e4 LT |
732 | int |
733 | usb_gadget_register_driver (struct usb_gadget_driver *driver) | |
734 | { | |
735 | struct dummy *dum = the_controller; | |
736 | int retval, i; | |
737 | ||
738 | if (!dum) | |
739 | return -EINVAL; | |
740 | if (dum->driver) | |
741 | return -EBUSY; | |
6bea476c | 742 | if (!driver->bind || !driver->setup |
1da177e4 LT |
743 | || driver->speed == USB_SPEED_UNKNOWN) |
744 | return -EINVAL; | |
745 | ||
746 | /* | |
747 | * SLAVE side init ... the layer above hardware, which | |
748 | * can't enumerate without help from the driver we're binding. | |
749 | */ | |
5742b0c9 | 750 | |
1da177e4 | 751 | dum->devstatus = 0; |
1da177e4 LT |
752 | |
753 | INIT_LIST_HEAD (&dum->gadget.ep_list); | |
754 | for (i = 0; i < DUMMY_ENDPOINTS; i++) { | |
755 | struct dummy_ep *ep = &dum->ep [i]; | |
756 | ||
757 | if (!ep_name [i]) | |
758 | break; | |
759 | ep->ep.name = ep_name [i]; | |
760 | ep->ep.ops = &dummy_ep_ops; | |
761 | list_add_tail (&ep->ep.ep_list, &dum->gadget.ep_list); | |
762 | ep->halted = ep->already_seen = ep->setup_stage = 0; | |
763 | ep->ep.maxpacket = ~0; | |
764 | ep->last_io = jiffies; | |
765 | ep->gadget = &dum->gadget; | |
766 | ep->desc = NULL; | |
767 | INIT_LIST_HEAD (&ep->queue); | |
768 | } | |
769 | ||
770 | dum->gadget.ep0 = &dum->ep [0].ep; | |
771 | dum->ep [0].ep.maxpacket = 64; | |
772 | list_del_init (&dum->ep [0].ep.ep_list); | |
773 | INIT_LIST_HEAD(&dum->fifo_req.queue); | |
774 | ||
775 | dum->driver = driver; | |
776 | dum->gadget.dev.driver = &driver->driver; | |
d9b76251 | 777 | dev_dbg (udc_dev(dum), "binding gadget driver '%s'\n", |
1da177e4 | 778 | driver->driver.name); |
efd54a36 AS |
779 | if ((retval = driver->bind (&dum->gadget)) != 0) |
780 | goto err_bind_gadget; | |
1da177e4 | 781 | |
1da177e4 | 782 | driver->driver.bus = dum->gadget.dev.parent->bus; |
efd54a36 AS |
783 | if ((retval = driver_register (&driver->driver)) != 0) |
784 | goto err_register; | |
785 | if ((retval = device_bind_driver (&dum->gadget.dev)) != 0) | |
786 | goto err_bind_driver; | |
1da177e4 LT |
787 | |
788 | /* khubd will enumerate this in a while */ | |
f1c39fad AS |
789 | spin_lock_irq (&dum->lock); |
790 | dum->pullup = 1; | |
791 | set_link_state (dum); | |
792 | spin_unlock_irq (&dum->lock); | |
685eb93f AS |
793 | |
794 | usb_hcd_poll_rh_status (dummy_to_hcd (dum)); | |
1da177e4 | 795 | return 0; |
efd54a36 AS |
796 | |
797 | err_bind_driver: | |
798 | driver_unregister (&driver->driver); | |
799 | err_register: | |
6bea476c DB |
800 | if (driver->unbind) |
801 | driver->unbind (&dum->gadget); | |
efd54a36 AS |
802 | spin_lock_irq (&dum->lock); |
803 | dum->pullup = 0; | |
804 | set_link_state (dum); | |
805 | spin_unlock_irq (&dum->lock); | |
806 | err_bind_gadget: | |
807 | dum->driver = NULL; | |
808 | dum->gadget.dev.driver = NULL; | |
809 | return retval; | |
1da177e4 LT |
810 | } |
811 | EXPORT_SYMBOL (usb_gadget_register_driver); | |
812 | ||
1da177e4 LT |
813 | int |
814 | usb_gadget_unregister_driver (struct usb_gadget_driver *driver) | |
815 | { | |
816 | struct dummy *dum = the_controller; | |
817 | unsigned long flags; | |
818 | ||
819 | if (!dum) | |
820 | return -ENODEV; | |
6bea476c | 821 | if (!driver || driver != dum->driver || !driver->unbind) |
1da177e4 LT |
822 | return -EINVAL; |
823 | ||
d9b76251 | 824 | dev_dbg (udc_dev(dum), "unregister gadget driver '%s'\n", |
1da177e4 LT |
825 | driver->driver.name); |
826 | ||
827 | spin_lock_irqsave (&dum->lock, flags); | |
f1c39fad AS |
828 | dum->pullup = 0; |
829 | set_link_state (dum); | |
1da177e4 LT |
830 | spin_unlock_irqrestore (&dum->lock, flags); |
831 | ||
832 | driver->unbind (&dum->gadget); | |
833 | dum->driver = NULL; | |
834 | ||
835 | device_release_driver (&dum->gadget.dev); | |
1da177e4 LT |
836 | driver_unregister (&driver->driver); |
837 | ||
f1c39fad AS |
838 | spin_lock_irqsave (&dum->lock, flags); |
839 | dum->pullup = 0; | |
840 | set_link_state (dum); | |
841 | spin_unlock_irqrestore (&dum->lock, flags); | |
842 | ||
685eb93f | 843 | usb_hcd_poll_rh_status (dummy_to_hcd (dum)); |
1da177e4 LT |
844 | return 0; |
845 | } | |
846 | EXPORT_SYMBOL (usb_gadget_unregister_driver); | |
847 | ||
848 | #undef is_enabled | |
849 | ||
cc095b0b AS |
850 | /* just declare this in any driver that really need it */ |
851 | extern int net2280_set_fifo_mode (struct usb_gadget *gadget, int mode); | |
852 | ||
1da177e4 LT |
853 | int net2280_set_fifo_mode (struct usb_gadget *gadget, int mode) |
854 | { | |
855 | return -ENOSYS; | |
856 | } | |
857 | EXPORT_SYMBOL (net2280_set_fifo_mode); | |
858 | ||
d9b76251 AS |
859 | |
860 | /* The gadget structure is stored inside the hcd structure and will be | |
861 | * released along with it. */ | |
862 | static void | |
863 | dummy_gadget_release (struct device *dev) | |
864 | { | |
d9b76251 AS |
865 | struct dummy *dum = gadget_dev_to_dummy (dev); |
866 | ||
17200583 | 867 | usb_put_hcd (dummy_to_hcd (dum)); |
d9b76251 AS |
868 | } |
869 | ||
8364d6b0 | 870 | static int dummy_udc_probe (struct platform_device *pdev) |
d9b76251 AS |
871 | { |
872 | struct dummy *dum = the_controller; | |
873 | int rc; | |
874 | ||
875 | dum->gadget.name = gadget_name; | |
876 | dum->gadget.ops = &dummy_ops; | |
877 | dum->gadget.is_dualspeed = 1; | |
878 | ||
879 | /* maybe claim OTG support, though we won't complete HNP */ | |
880 | dum->gadget.is_otg = (dummy_to_hcd(dum)->self.otg_port != 0); | |
881 | ||
882 | strcpy (dum->gadget.dev.bus_id, "gadget"); | |
8364d6b0 | 883 | dum->gadget.dev.parent = &pdev->dev; |
d9b76251 AS |
884 | dum->gadget.dev.release = dummy_gadget_release; |
885 | rc = device_register (&dum->gadget.dev); | |
886 | if (rc < 0) | |
887 | return rc; | |
888 | ||
17200583 | 889 | usb_get_hcd (dummy_to_hcd (dum)); |
d9b76251 | 890 | |
8364d6b0 | 891 | platform_set_drvdata (pdev, dum); |
efd54a36 AS |
892 | rc = device_create_file (&dum->gadget.dev, &dev_attr_function); |
893 | if (rc < 0) | |
894 | device_unregister (&dum->gadget.dev); | |
d9b76251 AS |
895 | return rc; |
896 | } | |
897 | ||
8364d6b0 | 898 | static int dummy_udc_remove (struct platform_device *pdev) |
d9b76251 | 899 | { |
8364d6b0 | 900 | struct dummy *dum = platform_get_drvdata (pdev); |
d9b76251 | 901 | |
8364d6b0 | 902 | platform_set_drvdata (pdev, NULL); |
d9b76251 AS |
903 | device_remove_file (&dum->gadget.dev, &dev_attr_function); |
904 | device_unregister (&dum->gadget.dev); | |
905 | return 0; | |
906 | } | |
907 | ||
8364d6b0 | 908 | static int dummy_udc_suspend (struct platform_device *pdev, pm_message_t state) |
391eca9d | 909 | { |
8364d6b0 | 910 | struct dummy *dum = platform_get_drvdata(pdev); |
391eca9d | 911 | |
8364d6b0 | 912 | dev_dbg (&pdev->dev, "%s\n", __FUNCTION__); |
391eca9d AS |
913 | spin_lock_irq (&dum->lock); |
914 | dum->udc_suspended = 1; | |
915 | set_link_state (dum); | |
916 | spin_unlock_irq (&dum->lock); | |
917 | ||
8364d6b0 | 918 | pdev->dev.power.power_state = state; |
391eca9d AS |
919 | usb_hcd_poll_rh_status (dummy_to_hcd (dum)); |
920 | return 0; | |
921 | } | |
922 | ||
8364d6b0 | 923 | static int dummy_udc_resume (struct platform_device *pdev) |
391eca9d | 924 | { |
8364d6b0 | 925 | struct dummy *dum = platform_get_drvdata(pdev); |
391eca9d | 926 | |
8364d6b0 | 927 | dev_dbg (&pdev->dev, "%s\n", __FUNCTION__); |
391eca9d AS |
928 | spin_lock_irq (&dum->lock); |
929 | dum->udc_suspended = 0; | |
930 | set_link_state (dum); | |
931 | spin_unlock_irq (&dum->lock); | |
932 | ||
8364d6b0 | 933 | pdev->dev.power.power_state = PMSG_ON; |
391eca9d AS |
934 | usb_hcd_poll_rh_status (dummy_to_hcd (dum)); |
935 | return 0; | |
936 | } | |
937 | ||
3ae5eaec | 938 | static struct platform_driver dummy_udc_driver = { |
d9b76251 AS |
939 | .probe = dummy_udc_probe, |
940 | .remove = dummy_udc_remove, | |
391eca9d AS |
941 | .suspend = dummy_udc_suspend, |
942 | .resume = dummy_udc_resume, | |
3ae5eaec RK |
943 | .driver = { |
944 | .name = (char *) gadget_name, | |
945 | .owner = THIS_MODULE, | |
946 | }, | |
d9b76251 AS |
947 | }; |
948 | ||
1da177e4 LT |
949 | /*-------------------------------------------------------------------------*/ |
950 | ||
951 | /* MASTER/HOST SIDE DRIVER | |
952 | * | |
953 | * this uses the hcd framework to hook up to host side drivers. | |
954 | * its root hub will only have one device, otherwise it acts like | |
955 | * a normal host controller. | |
956 | * | |
957 | * when urbs are queued, they're just stuck on a list that we | |
958 | * scan in a timer callback. that callback connects writes from | |
959 | * the host with reads from the device, and so on, based on the | |
960 | * usb 2.0 rules. | |
961 | */ | |
962 | ||
963 | static int dummy_urb_enqueue ( | |
964 | struct usb_hcd *hcd, | |
1da177e4 | 965 | struct urb *urb, |
55016f10 | 966 | gfp_t mem_flags |
1da177e4 LT |
967 | ) { |
968 | struct dummy *dum; | |
969 | struct urbp *urbp; | |
970 | unsigned long flags; | |
e9df41c5 | 971 | int rc; |
1da177e4 LT |
972 | |
973 | if (!urb->transfer_buffer && urb->transfer_buffer_length) | |
974 | return -EINVAL; | |
975 | ||
976 | urbp = kmalloc (sizeof *urbp, mem_flags); | |
977 | if (!urbp) | |
978 | return -ENOMEM; | |
979 | urbp->urb = urb; | |
980 | ||
981 | dum = hcd_to_dummy (hcd); | |
982 | spin_lock_irqsave (&dum->lock, flags); | |
e9df41c5 AS |
983 | rc = usb_hcd_link_urb_to_ep(hcd, urb); |
984 | if (rc) { | |
985 | kfree(urbp); | |
986 | goto done; | |
987 | } | |
1da177e4 LT |
988 | |
989 | if (!dum->udev) { | |
990 | dum->udev = urb->dev; | |
991 | usb_get_dev (dum->udev); | |
992 | } else if (unlikely (dum->udev != urb->dev)) | |
993 | dev_err (dummy_dev(dum), "usb_device address has changed!\n"); | |
994 | ||
995 | list_add_tail (&urbp->urbp_list, &dum->urbp_list); | |
996 | urb->hcpriv = urbp; | |
997 | if (usb_pipetype (urb->pipe) == PIPE_CONTROL) | |
998 | urb->error_count = 1; /* mark as a new urb */ | |
999 | ||
1000 | /* kick the scheduler, it'll do the rest */ | |
1001 | if (!timer_pending (&dum->timer)) | |
1002 | mod_timer (&dum->timer, jiffies + 1); | |
1003 | ||
e9df41c5 | 1004 | done: |
63f991b2 | 1005 | spin_unlock_irqrestore(&dum->lock, flags); |
e9df41c5 | 1006 | return rc; |
1da177e4 LT |
1007 | } |
1008 | ||
e9df41c5 | 1009 | static int dummy_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status) |
1da177e4 | 1010 | { |
391eca9d AS |
1011 | struct dummy *dum; |
1012 | unsigned long flags; | |
e9df41c5 | 1013 | int rc; |
391eca9d AS |
1014 | |
1015 | /* giveback happens automatically in timer callback, | |
1016 | * so make sure the callback happens */ | |
1017 | dum = hcd_to_dummy (hcd); | |
1018 | spin_lock_irqsave (&dum->lock, flags); | |
e9df41c5 AS |
1019 | |
1020 | rc = usb_hcd_check_unlink_urb(hcd, urb, status); | |
1021 | if (!rc && dum->rh_state != DUMMY_RH_RUNNING && | |
1022 | !list_empty(&dum->urbp_list)) | |
391eca9d | 1023 | mod_timer (&dum->timer, jiffies); |
e9df41c5 | 1024 | |
391eca9d | 1025 | spin_unlock_irqrestore (&dum->lock, flags); |
e9df41c5 | 1026 | return rc; |
1da177e4 LT |
1027 | } |
1028 | ||
1da177e4 LT |
1029 | /* transfer up to a frame's worth; caller must own lock */ |
1030 | static int | |
4d2f110c AS |
1031 | transfer(struct dummy *dum, struct urb *urb, struct dummy_ep *ep, int limit, |
1032 | int *status) | |
1da177e4 LT |
1033 | { |
1034 | struct dummy_request *req; | |
1035 | ||
1036 | top: | |
1037 | /* if there's no request queued, the device is NAKing; return */ | |
1038 | list_for_each_entry (req, &ep->queue, queue) { | |
1039 | unsigned host_len, dev_len, len; | |
1040 | int is_short, to_host; | |
1041 | int rescan = 0; | |
1042 | ||
1043 | /* 1..N packets of ep->ep.maxpacket each ... the last one | |
1044 | * may be short (including zero length). | |
1045 | * | |
1046 | * writer can send a zlp explicitly (length 0) or implicitly | |
1047 | * (length mod maxpacket zero, and 'zero' flag); they always | |
1048 | * terminate reads. | |
1049 | */ | |
1050 | host_len = urb->transfer_buffer_length - urb->actual_length; | |
1051 | dev_len = req->req.length - req->req.actual; | |
1052 | len = min (host_len, dev_len); | |
1053 | ||
1054 | /* FIXME update emulated data toggle too */ | |
1055 | ||
1056 | to_host = usb_pipein (urb->pipe); | |
1057 | if (unlikely (len == 0)) | |
1058 | is_short = 1; | |
1059 | else { | |
1060 | char *ubuf, *rbuf; | |
1061 | ||
1062 | /* not enough bandwidth left? */ | |
1063 | if (limit < ep->ep.maxpacket && limit < len) | |
1064 | break; | |
1065 | len = min (len, (unsigned) limit); | |
1066 | if (len == 0) | |
1067 | break; | |
1068 | ||
1069 | /* use an extra pass for the final short packet */ | |
1070 | if (len > ep->ep.maxpacket) { | |
1071 | rescan = 1; | |
1072 | len -= (len % ep->ep.maxpacket); | |
1073 | } | |
1074 | is_short = (len % ep->ep.maxpacket) != 0; | |
1075 | ||
1076 | /* else transfer packet(s) */ | |
1077 | ubuf = urb->transfer_buffer + urb->actual_length; | |
1078 | rbuf = req->req.buf + req->req.actual; | |
1079 | if (to_host) | |
1080 | memcpy (ubuf, rbuf, len); | |
1081 | else | |
1082 | memcpy (rbuf, ubuf, len); | |
1083 | ep->last_io = jiffies; | |
1084 | ||
1085 | limit -= len; | |
1086 | urb->actual_length += len; | |
1087 | req->req.actual += len; | |
1088 | } | |
1089 | ||
1090 | /* short packets terminate, maybe with overflow/underflow. | |
1091 | * it's only really an error to write too much. | |
1092 | * | |
1093 | * partially filling a buffer optionally blocks queue advances | |
1094 | * (so completion handlers can clean up the queue) but we don't | |
b0d9efba | 1095 | * need to emulate such data-in-flight. |
1da177e4 LT |
1096 | */ |
1097 | if (is_short) { | |
1098 | if (host_len == dev_len) { | |
1099 | req->req.status = 0; | |
4d2f110c | 1100 | *status = 0; |
1da177e4 LT |
1101 | } else if (to_host) { |
1102 | req->req.status = 0; | |
1103 | if (dev_len > host_len) | |
4d2f110c | 1104 | *status = -EOVERFLOW; |
1da177e4 | 1105 | else |
4d2f110c | 1106 | *status = 0; |
1da177e4 | 1107 | } else if (!to_host) { |
4d2f110c | 1108 | *status = 0; |
1da177e4 LT |
1109 | if (host_len > dev_len) |
1110 | req->req.status = -EOVERFLOW; | |
1111 | else | |
1112 | req->req.status = 0; | |
1113 | } | |
1114 | ||
1115 | /* many requests terminate without a short packet */ | |
1116 | } else { | |
1117 | if (req->req.length == req->req.actual | |
1118 | && !req->req.zero) | |
1119 | req->req.status = 0; | |
1120 | if (urb->transfer_buffer_length == urb->actual_length | |
1121 | && !(urb->transfer_flags | |
4d2f110c AS |
1122 | & URB_ZERO_PACKET)) |
1123 | *status = 0; | |
1da177e4 LT |
1124 | } |
1125 | ||
1126 | /* device side completion --> continuable */ | |
1127 | if (req->req.status != -EINPROGRESS) { | |
1128 | list_del_init (&req->queue); | |
1129 | ||
1130 | spin_unlock (&dum->lock); | |
1131 | req->req.complete (&ep->ep, &req->req); | |
1132 | spin_lock (&dum->lock); | |
1133 | ||
1134 | /* requests might have been unlinked... */ | |
1135 | rescan = 1; | |
1136 | } | |
1137 | ||
1138 | /* host side completion --> terminate */ | |
4d2f110c | 1139 | if (*status != -EINPROGRESS) |
1da177e4 LT |
1140 | break; |
1141 | ||
1142 | /* rescan to continue with any other queued i/o */ | |
1143 | if (rescan) | |
1144 | goto top; | |
1145 | } | |
1146 | return limit; | |
1147 | } | |
1148 | ||
1149 | static int periodic_bytes (struct dummy *dum, struct dummy_ep *ep) | |
1150 | { | |
1151 | int limit = ep->ep.maxpacket; | |
1152 | ||
1153 | if (dum->gadget.speed == USB_SPEED_HIGH) { | |
1154 | int tmp; | |
1155 | ||
1156 | /* high bandwidth mode */ | |
1157 | tmp = le16_to_cpu(ep->desc->wMaxPacketSize); | |
1da177e4 LT |
1158 | tmp = (tmp >> 11) & 0x03; |
1159 | tmp *= 8 /* applies to entire frame */; | |
1160 | limit += limit * tmp; | |
1161 | } | |
1162 | return limit; | |
1163 | } | |
1164 | ||
1165 | #define is_active(dum) ((dum->port_status & \ | |
1166 | (USB_PORT_STAT_CONNECTION | USB_PORT_STAT_ENABLE | \ | |
1167 | USB_PORT_STAT_SUSPEND)) \ | |
1168 | == (USB_PORT_STAT_CONNECTION | USB_PORT_STAT_ENABLE)) | |
1169 | ||
1170 | static struct dummy_ep *find_endpoint (struct dummy *dum, u8 address) | |
1171 | { | |
1172 | int i; | |
1173 | ||
1174 | if (!is_active (dum)) | |
1175 | return NULL; | |
1176 | if ((address & ~USB_DIR_IN) == 0) | |
1177 | return &dum->ep [0]; | |
1178 | for (i = 1; i < DUMMY_ENDPOINTS; i++) { | |
1179 | struct dummy_ep *ep = &dum->ep [i]; | |
1180 | ||
1181 | if (!ep->desc) | |
1182 | continue; | |
1183 | if (ep->desc->bEndpointAddress == address) | |
1184 | return ep; | |
1185 | } | |
1186 | return NULL; | |
1187 | } | |
1188 | ||
1189 | #undef is_active | |
1190 | ||
1191 | #define Dev_Request (USB_TYPE_STANDARD | USB_RECIP_DEVICE) | |
1192 | #define Dev_InRequest (Dev_Request | USB_DIR_IN) | |
1193 | #define Intf_Request (USB_TYPE_STANDARD | USB_RECIP_INTERFACE) | |
1194 | #define Intf_InRequest (Intf_Request | USB_DIR_IN) | |
1195 | #define Ep_Request (USB_TYPE_STANDARD | USB_RECIP_ENDPOINT) | |
1196 | #define Ep_InRequest (Ep_Request | USB_DIR_IN) | |
1197 | ||
1198 | /* drive both sides of the transfers; looks like irq handlers to | |
1199 | * both drivers except the callbacks aren't in_irq(). | |
1200 | */ | |
1201 | static void dummy_timer (unsigned long _dum) | |
1202 | { | |
1203 | struct dummy *dum = (struct dummy *) _dum; | |
1204 | struct urbp *urbp, *tmp; | |
1205 | unsigned long flags; | |
1206 | int limit, total; | |
1207 | int i; | |
1208 | ||
1209 | /* simplistic model for one frame's bandwidth */ | |
1210 | switch (dum->gadget.speed) { | |
1211 | case USB_SPEED_LOW: | |
1212 | total = 8/*bytes*/ * 12/*packets*/; | |
1213 | break; | |
1214 | case USB_SPEED_FULL: | |
1215 | total = 64/*bytes*/ * 19/*packets*/; | |
1216 | break; | |
1217 | case USB_SPEED_HIGH: | |
1218 | total = 512/*bytes*/ * 13/*packets*/ * 8/*uframes*/; | |
1219 | break; | |
1220 | default: | |
1221 | dev_err (dummy_dev(dum), "bogus device speed\n"); | |
1222 | return; | |
1223 | } | |
1224 | ||
1225 | /* FIXME if HZ != 1000 this will probably misbehave ... */ | |
1226 | ||
1227 | /* look at each urb queued by the host side driver */ | |
1228 | spin_lock_irqsave (&dum->lock, flags); | |
1229 | ||
1230 | if (!dum->udev) { | |
1231 | dev_err (dummy_dev(dum), | |
1232 | "timer fired with no URBs pending?\n"); | |
1233 | spin_unlock_irqrestore (&dum->lock, flags); | |
1234 | return; | |
1235 | } | |
1236 | ||
1237 | for (i = 0; i < DUMMY_ENDPOINTS; i++) { | |
1238 | if (!ep_name [i]) | |
1239 | break; | |
1240 | dum->ep [i].already_seen = 0; | |
1241 | } | |
1242 | ||
1243 | restart: | |
1244 | list_for_each_entry_safe (urbp, tmp, &dum->urbp_list, urbp_list) { | |
1245 | struct urb *urb; | |
1246 | struct dummy_request *req; | |
1247 | u8 address; | |
1248 | struct dummy_ep *ep = NULL; | |
1249 | int type; | |
4d2f110c | 1250 | int status = -EINPROGRESS; |
1da177e4 LT |
1251 | |
1252 | urb = urbp->urb; | |
eb231054 | 1253 | if (urb->unlinked) |
1da177e4 | 1254 | goto return_urb; |
eb231054 | 1255 | else if (dum->rh_state != DUMMY_RH_RUNNING) |
391eca9d | 1256 | continue; |
1da177e4 LT |
1257 | type = usb_pipetype (urb->pipe); |
1258 | ||
1259 | /* used up this frame's non-periodic bandwidth? | |
1260 | * FIXME there's infinite bandwidth for control and | |
1261 | * periodic transfers ... unrealistic. | |
1262 | */ | |
1263 | if (total <= 0 && type == PIPE_BULK) | |
1264 | continue; | |
1265 | ||
1266 | /* find the gadget's ep for this request (if configured) */ | |
1267 | address = usb_pipeendpoint (urb->pipe); | |
1268 | if (usb_pipein (urb->pipe)) | |
1269 | address |= USB_DIR_IN; | |
1270 | ep = find_endpoint(dum, address); | |
1271 | if (!ep) { | |
1272 | /* set_configuration() disagreement */ | |
1273 | dev_dbg (dummy_dev(dum), | |
1274 | "no ep configured for urb %p\n", | |
1275 | urb); | |
4d2f110c | 1276 | status = -EPROTO; |
1da177e4 LT |
1277 | goto return_urb; |
1278 | } | |
1279 | ||
1280 | if (ep->already_seen) | |
1281 | continue; | |
1282 | ep->already_seen = 1; | |
1283 | if (ep == &dum->ep [0] && urb->error_count) { | |
1284 | ep->setup_stage = 1; /* a new urb */ | |
1285 | urb->error_count = 0; | |
1286 | } | |
1287 | if (ep->halted && !ep->setup_stage) { | |
1288 | /* NOTE: must not be iso! */ | |
1289 | dev_dbg (dummy_dev(dum), "ep %s halted, urb %p\n", | |
1290 | ep->ep.name, urb); | |
4d2f110c | 1291 | status = -EPIPE; |
1da177e4 LT |
1292 | goto return_urb; |
1293 | } | |
1294 | /* FIXME make sure both ends agree on maxpacket */ | |
1295 | ||
1296 | /* handle control requests */ | |
1297 | if (ep == &dum->ep [0] && ep->setup_stage) { | |
1298 | struct usb_ctrlrequest setup; | |
1299 | int value = 1; | |
1300 | struct dummy_ep *ep2; | |
cc095b0b AS |
1301 | unsigned w_index; |
1302 | unsigned w_value; | |
1da177e4 LT |
1303 | |
1304 | setup = *(struct usb_ctrlrequest*) urb->setup_packet; | |
cc095b0b AS |
1305 | w_index = le16_to_cpu(setup.wIndex); |
1306 | w_value = le16_to_cpu(setup.wValue); | |
1307 | if (le16_to_cpu(setup.wLength) != | |
1308 | urb->transfer_buffer_length) { | |
4d2f110c | 1309 | status = -EOVERFLOW; |
1da177e4 LT |
1310 | goto return_urb; |
1311 | } | |
1312 | ||
1313 | /* paranoia, in case of stale queued data */ | |
1314 | list_for_each_entry (req, &ep->queue, queue) { | |
1315 | list_del_init (&req->queue); | |
1316 | req->req.status = -EOVERFLOW; | |
d9b76251 | 1317 | dev_dbg (udc_dev(dum), "stale req = %p\n", |
1da177e4 LT |
1318 | req); |
1319 | ||
1320 | spin_unlock (&dum->lock); | |
1321 | req->req.complete (&ep->ep, &req->req); | |
1322 | spin_lock (&dum->lock); | |
1323 | ep->already_seen = 0; | |
1324 | goto restart; | |
1325 | } | |
1326 | ||
1327 | /* gadget driver never sees set_address or operations | |
1328 | * on standard feature flags. some hardware doesn't | |
1329 | * even expose them. | |
1330 | */ | |
1331 | ep->last_io = jiffies; | |
1332 | ep->setup_stage = 0; | |
1333 | ep->halted = 0; | |
1334 | switch (setup.bRequest) { | |
1335 | case USB_REQ_SET_ADDRESS: | |
1336 | if (setup.bRequestType != Dev_Request) | |
1337 | break; | |
cc095b0b | 1338 | dum->address = w_value; |
4d2f110c | 1339 | status = 0; |
d9b76251 | 1340 | dev_dbg (udc_dev(dum), "set_address = %d\n", |
cc095b0b | 1341 | w_value); |
1da177e4 LT |
1342 | value = 0; |
1343 | break; | |
1344 | case USB_REQ_SET_FEATURE: | |
1345 | if (setup.bRequestType == Dev_Request) { | |
1346 | value = 0; | |
cc095b0b | 1347 | switch (w_value) { |
1da177e4 LT |
1348 | case USB_DEVICE_REMOTE_WAKEUP: |
1349 | break; | |
5742b0c9 AS |
1350 | case USB_DEVICE_B_HNP_ENABLE: |
1351 | dum->gadget.b_hnp_enable = 1; | |
1352 | break; | |
1353 | case USB_DEVICE_A_HNP_SUPPORT: | |
1354 | dum->gadget.a_hnp_support = 1; | |
1355 | break; | |
1356 | case USB_DEVICE_A_ALT_HNP_SUPPORT: | |
1357 | dum->gadget.a_alt_hnp_support | |
1358 | = 1; | |
1359 | break; | |
1da177e4 LT |
1360 | default: |
1361 | value = -EOPNOTSUPP; | |
1362 | } | |
1363 | if (value == 0) { | |
1364 | dum->devstatus |= | |
cc095b0b | 1365 | (1 << w_value); |
4d2f110c | 1366 | status = 0; |
1da177e4 LT |
1367 | } |
1368 | ||
1369 | } else if (setup.bRequestType == Ep_Request) { | |
1370 | // endpoint halt | |
cc095b0b | 1371 | ep2 = find_endpoint (dum, w_index); |
1da177e4 LT |
1372 | if (!ep2) { |
1373 | value = -EOPNOTSUPP; | |
1374 | break; | |
1375 | } | |
1376 | ep2->halted = 1; | |
1377 | value = 0; | |
4d2f110c | 1378 | status = 0; |
1da177e4 LT |
1379 | } |
1380 | break; | |
1381 | case USB_REQ_CLEAR_FEATURE: | |
1382 | if (setup.bRequestType == Dev_Request) { | |
cc095b0b | 1383 | switch (w_value) { |
1da177e4 LT |
1384 | case USB_DEVICE_REMOTE_WAKEUP: |
1385 | dum->devstatus &= ~(1 << | |
1386 | USB_DEVICE_REMOTE_WAKEUP); | |
1387 | value = 0; | |
4d2f110c | 1388 | status = 0; |
1da177e4 LT |
1389 | break; |
1390 | default: | |
1391 | value = -EOPNOTSUPP; | |
1392 | break; | |
1393 | } | |
1394 | } else if (setup.bRequestType == Ep_Request) { | |
1395 | // endpoint halt | |
cc095b0b | 1396 | ep2 = find_endpoint (dum, w_index); |
1da177e4 LT |
1397 | if (!ep2) { |
1398 | value = -EOPNOTSUPP; | |
1399 | break; | |
1400 | } | |
1401 | ep2->halted = 0; | |
1402 | value = 0; | |
4d2f110c | 1403 | status = 0; |
1da177e4 LT |
1404 | } |
1405 | break; | |
1406 | case USB_REQ_GET_STATUS: | |
1407 | if (setup.bRequestType == Dev_InRequest | |
1408 | || setup.bRequestType | |
1409 | == Intf_InRequest | |
1410 | || setup.bRequestType | |
1411 | == Ep_InRequest | |
1412 | ) { | |
1413 | char *buf; | |
1414 | ||
1415 | // device: remote wakeup, selfpowered | |
1416 | // interface: nothing | |
1417 | // endpoint: halt | |
1418 | buf = (char *)urb->transfer_buffer; | |
1419 | if (urb->transfer_buffer_length > 0) { | |
1420 | if (setup.bRequestType == | |
1421 | Ep_InRequest) { | |
cc095b0b | 1422 | ep2 = find_endpoint (dum, w_index); |
1da177e4 LT |
1423 | if (!ep2) { |
1424 | value = -EOPNOTSUPP; | |
1425 | break; | |
1426 | } | |
1427 | buf [0] = ep2->halted; | |
1428 | } else if (setup.bRequestType == | |
1429 | Dev_InRequest) { | |
1430 | buf [0] = (u8) | |
1431 | dum->devstatus; | |
1432 | } else | |
1433 | buf [0] = 0; | |
1434 | } | |
1435 | if (urb->transfer_buffer_length > 1) | |
1436 | buf [1] = 0; | |
1437 | urb->actual_length = min (2, | |
1438 | urb->transfer_buffer_length); | |
1439 | value = 0; | |
4d2f110c | 1440 | status = 0; |
1da177e4 LT |
1441 | } |
1442 | break; | |
1443 | } | |
1444 | ||
1445 | /* gadget driver handles all other requests. block | |
1446 | * until setup() returns; no reentrancy issues etc. | |
1447 | */ | |
1448 | if (value > 0) { | |
1449 | spin_unlock (&dum->lock); | |
1450 | value = dum->driver->setup (&dum->gadget, | |
1451 | &setup); | |
1452 | spin_lock (&dum->lock); | |
1453 | ||
1454 | if (value >= 0) { | |
1455 | /* no delays (max 64KB data stage) */ | |
1456 | limit = 64*1024; | |
1457 | goto treat_control_like_bulk; | |
1458 | } | |
1459 | /* error, see below */ | |
1460 | } | |
1461 | ||
1462 | if (value < 0) { | |
1463 | if (value != -EOPNOTSUPP) | |
d9b76251 | 1464 | dev_dbg (udc_dev(dum), |
1da177e4 LT |
1465 | "setup --> %d\n", |
1466 | value); | |
4d2f110c | 1467 | status = -EPIPE; |
1da177e4 LT |
1468 | urb->actual_length = 0; |
1469 | } | |
1470 | ||
1471 | goto return_urb; | |
1472 | } | |
1473 | ||
1474 | /* non-control requests */ | |
1475 | limit = total; | |
1476 | switch (usb_pipetype (urb->pipe)) { | |
1477 | case PIPE_ISOCHRONOUS: | |
1478 | /* FIXME is it urb->interval since the last xfer? | |
1479 | * use urb->iso_frame_desc[i]. | |
1480 | * complete whether or not ep has requests queued. | |
1481 | * report random errors, to debug drivers. | |
1482 | */ | |
1483 | limit = max (limit, periodic_bytes (dum, ep)); | |
4d2f110c | 1484 | status = -ENOSYS; |
1da177e4 LT |
1485 | break; |
1486 | ||
1487 | case PIPE_INTERRUPT: | |
1488 | /* FIXME is it urb->interval since the last xfer? | |
1489 | * this almost certainly polls too fast. | |
1490 | */ | |
1491 | limit = max (limit, periodic_bytes (dum, ep)); | |
1492 | /* FALLTHROUGH */ | |
1493 | ||
1494 | // case PIPE_BULK: case PIPE_CONTROL: | |
1495 | default: | |
1496 | treat_control_like_bulk: | |
1497 | ep->last_io = jiffies; | |
4d2f110c | 1498 | total = transfer(dum, urb, ep, limit, &status); |
1da177e4 LT |
1499 | break; |
1500 | } | |
1501 | ||
1502 | /* incomplete transfer? */ | |
4d2f110c | 1503 | if (status == -EINPROGRESS) |
1da177e4 LT |
1504 | continue; |
1505 | ||
1506 | return_urb: | |
1da177e4 LT |
1507 | list_del (&urbp->urbp_list); |
1508 | kfree (urbp); | |
1509 | if (ep) | |
1510 | ep->already_seen = ep->setup_stage = 0; | |
1511 | ||
e9df41c5 | 1512 | usb_hcd_unlink_urb_from_ep(dummy_to_hcd(dum), urb); |
1da177e4 | 1513 | spin_unlock (&dum->lock); |
4a00027d | 1514 | usb_hcd_giveback_urb(dummy_to_hcd(dum), urb, status); |
1da177e4 LT |
1515 | spin_lock (&dum->lock); |
1516 | ||
1517 | goto restart; | |
1518 | } | |
1519 | ||
391eca9d | 1520 | if (list_empty (&dum->urbp_list)) { |
1da177e4 LT |
1521 | usb_put_dev (dum->udev); |
1522 | dum->udev = NULL; | |
391eca9d AS |
1523 | } else if (dum->rh_state == DUMMY_RH_RUNNING) { |
1524 | /* want a 1 msec delay here */ | |
1525 | mod_timer (&dum->timer, jiffies + msecs_to_jiffies(1)); | |
1da177e4 LT |
1526 | } |
1527 | ||
1528 | spin_unlock_irqrestore (&dum->lock, flags); | |
1529 | } | |
1530 | ||
1531 | /*-------------------------------------------------------------------------*/ | |
1532 | ||
1533 | #define PORT_C_MASK \ | |
c2db8b5e AS |
1534 | ((USB_PORT_STAT_C_CONNECTION \ |
1535 | | USB_PORT_STAT_C_ENABLE \ | |
1536 | | USB_PORT_STAT_C_SUSPEND \ | |
1537 | | USB_PORT_STAT_C_OVERCURRENT \ | |
1538 | | USB_PORT_STAT_C_RESET) << 16) | |
1da177e4 LT |
1539 | |
1540 | static int dummy_hub_status (struct usb_hcd *hcd, char *buf) | |
1541 | { | |
1542 | struct dummy *dum; | |
1543 | unsigned long flags; | |
391eca9d | 1544 | int retval = 0; |
1da177e4 LT |
1545 | |
1546 | dum = hcd_to_dummy (hcd); | |
1547 | ||
1548 | spin_lock_irqsave (&dum->lock, flags); | |
3cf0a22e | 1549 | if (!test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags)) |
391eca9d | 1550 | goto done; |
f1c39fad AS |
1551 | |
1552 | if (dum->resuming && time_after_eq (jiffies, dum->re_timeout)) { | |
1553 | dum->port_status |= (USB_PORT_STAT_C_SUSPEND << 16); | |
1554 | dum->port_status &= ~USB_PORT_STAT_SUSPEND; | |
1555 | set_link_state (dum); | |
1556 | } | |
1557 | ||
391eca9d | 1558 | if ((dum->port_status & PORT_C_MASK) != 0) { |
1da177e4 LT |
1559 | *buf = (1 << 1); |
1560 | dev_dbg (dummy_dev(dum), "port status 0x%08x has changes\n", | |
391eca9d | 1561 | dum->port_status); |
1da177e4 | 1562 | retval = 1; |
391eca9d AS |
1563 | if (dum->rh_state == DUMMY_RH_SUSPENDED) |
1564 | usb_hcd_resume_root_hub (hcd); | |
1da177e4 | 1565 | } |
391eca9d | 1566 | done: |
1da177e4 LT |
1567 | spin_unlock_irqrestore (&dum->lock, flags); |
1568 | return retval; | |
1569 | } | |
1570 | ||
1571 | static inline void | |
1572 | hub_descriptor (struct usb_hub_descriptor *desc) | |
1573 | { | |
1574 | memset (desc, 0, sizeof *desc); | |
1575 | desc->bDescriptorType = 0x29; | |
1576 | desc->bDescLength = 9; | |
cc095b0b AS |
1577 | desc->wHubCharacteristics = (__force __u16) |
1578 | (__constant_cpu_to_le16 (0x0001)); | |
1da177e4 LT |
1579 | desc->bNbrPorts = 1; |
1580 | desc->bitmap [0] = 0xff; | |
1581 | desc->bitmap [1] = 0xff; | |
1582 | } | |
1583 | ||
1584 | static int dummy_hub_control ( | |
1585 | struct usb_hcd *hcd, | |
1586 | u16 typeReq, | |
1587 | u16 wValue, | |
1588 | u16 wIndex, | |
1589 | char *buf, | |
1590 | u16 wLength | |
1591 | ) { | |
1592 | struct dummy *dum; | |
1593 | int retval = 0; | |
1594 | unsigned long flags; | |
1595 | ||
3cf0a22e | 1596 | if (!test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags)) |
391eca9d AS |
1597 | return -ETIMEDOUT; |
1598 | ||
1da177e4 LT |
1599 | dum = hcd_to_dummy (hcd); |
1600 | spin_lock_irqsave (&dum->lock, flags); | |
1601 | switch (typeReq) { | |
1602 | case ClearHubFeature: | |
1603 | break; | |
1604 | case ClearPortFeature: | |
1605 | switch (wValue) { | |
1606 | case USB_PORT_FEAT_SUSPEND: | |
c2db8b5e | 1607 | if (dum->port_status & USB_PORT_STAT_SUSPEND) { |
1da177e4 LT |
1608 | /* 20msec resume signaling */ |
1609 | dum->resuming = 1; | |
1610 | dum->re_timeout = jiffies + | |
f1c39fad | 1611 | msecs_to_jiffies(20); |
1da177e4 LT |
1612 | } |
1613 | break; | |
1614 | case USB_PORT_FEAT_POWER: | |
f1c39fad AS |
1615 | if (dum->port_status & USB_PORT_STAT_POWER) |
1616 | dev_dbg (dummy_dev(dum), "power-off\n"); | |
1617 | /* FALLS THROUGH */ | |
1da177e4 LT |
1618 | default: |
1619 | dum->port_status &= ~(1 << wValue); | |
f1c39fad | 1620 | set_link_state (dum); |
1da177e4 LT |
1621 | } |
1622 | break; | |
1623 | case GetHubDescriptor: | |
1624 | hub_descriptor ((struct usb_hub_descriptor *) buf); | |
1625 | break; | |
1626 | case GetHubStatus: | |
cc095b0b | 1627 | *(__le32 *) buf = __constant_cpu_to_le32 (0); |
1da177e4 LT |
1628 | break; |
1629 | case GetPortStatus: | |
1630 | if (wIndex != 1) | |
1631 | retval = -EPIPE; | |
1632 | ||
1633 | /* whoever resets or resumes must GetPortStatus to | |
1634 | * complete it!! | |
1635 | */ | |
f1c39fad AS |
1636 | if (dum->resuming && |
1637 | time_after_eq (jiffies, dum->re_timeout)) { | |
c2db8b5e AS |
1638 | dum->port_status |= (USB_PORT_STAT_C_SUSPEND << 16); |
1639 | dum->port_status &= ~USB_PORT_STAT_SUSPEND; | |
1da177e4 | 1640 | } |
f1c39fad AS |
1641 | if ((dum->port_status & USB_PORT_STAT_RESET) != 0 && |
1642 | time_after_eq (jiffies, dum->re_timeout)) { | |
c2db8b5e AS |
1643 | dum->port_status |= (USB_PORT_STAT_C_RESET << 16); |
1644 | dum->port_status &= ~USB_PORT_STAT_RESET; | |
f1c39fad | 1645 | if (dum->pullup) { |
1da177e4 LT |
1646 | dum->port_status |= USB_PORT_STAT_ENABLE; |
1647 | /* give it the best speed we agree on */ | |
1648 | dum->gadget.speed = dum->driver->speed; | |
1649 | dum->gadget.ep0->maxpacket = 64; | |
1650 | switch (dum->gadget.speed) { | |
1651 | case USB_SPEED_HIGH: | |
1652 | dum->port_status |= | |
1653 | USB_PORT_STAT_HIGH_SPEED; | |
1654 | break; | |
1655 | case USB_SPEED_LOW: | |
1656 | dum->gadget.ep0->maxpacket = 8; | |
1657 | dum->port_status |= | |
1658 | USB_PORT_STAT_LOW_SPEED; | |
1659 | break; | |
1660 | default: | |
1661 | dum->gadget.speed = USB_SPEED_FULL; | |
1662 | break; | |
1663 | } | |
1664 | } | |
1665 | } | |
f1c39fad | 1666 | set_link_state (dum); |
cc095b0b AS |
1667 | ((__le16 *) buf)[0] = cpu_to_le16 (dum->port_status); |
1668 | ((__le16 *) buf)[1] = cpu_to_le16 (dum->port_status >> 16); | |
1da177e4 LT |
1669 | break; |
1670 | case SetHubFeature: | |
1671 | retval = -EPIPE; | |
1672 | break; | |
1673 | case SetPortFeature: | |
1674 | switch (wValue) { | |
1675 | case USB_PORT_FEAT_SUSPEND: | |
f1c39fad | 1676 | if (dum->active) { |
c2db8b5e | 1677 | dum->port_status |= USB_PORT_STAT_SUSPEND; |
f1c39fad AS |
1678 | |
1679 | /* HNP would happen here; for now we | |
1680 | * assume b_bus_req is always true. | |
1681 | */ | |
1682 | set_link_state (dum); | |
1683 | if (((1 << USB_DEVICE_B_HNP_ENABLE) | |
1684 | & dum->devstatus) != 0) | |
1685 | dev_dbg (dummy_dev(dum), | |
5742b0c9 | 1686 | "no HNP yet!\n"); |
1da177e4 LT |
1687 | } |
1688 | break; | |
f1c39fad AS |
1689 | case USB_PORT_FEAT_POWER: |
1690 | dum->port_status |= USB_PORT_STAT_POWER; | |
1691 | set_link_state (dum); | |
1692 | break; | |
1da177e4 | 1693 | case USB_PORT_FEAT_RESET: |
f1c39fad AS |
1694 | /* if it's already enabled, disable */ |
1695 | dum->port_status &= ~(USB_PORT_STAT_ENABLE | |
1696 | | USB_PORT_STAT_LOW_SPEED | |
1697 | | USB_PORT_STAT_HIGH_SPEED); | |
391eca9d | 1698 | dum->devstatus = 0; |
1da177e4 LT |
1699 | /* 50msec reset signaling */ |
1700 | dum->re_timeout = jiffies + msecs_to_jiffies(50); | |
f1c39fad | 1701 | /* FALLS THROUGH */ |
1da177e4 | 1702 | default: |
f1c39fad AS |
1703 | if ((dum->port_status & USB_PORT_STAT_POWER) != 0) { |
1704 | dum->port_status |= (1 << wValue); | |
1705 | set_link_state (dum); | |
1706 | } | |
1da177e4 LT |
1707 | } |
1708 | break; | |
1709 | ||
1710 | default: | |
1711 | dev_dbg (dummy_dev(dum), | |
1712 | "hub control req%04x v%04x i%04x l%d\n", | |
1713 | typeReq, wValue, wIndex, wLength); | |
1714 | ||
1715 | /* "protocol stall" on error */ | |
1716 | retval = -EPIPE; | |
1717 | } | |
1718 | spin_unlock_irqrestore (&dum->lock, flags); | |
685eb93f AS |
1719 | |
1720 | if ((dum->port_status & PORT_C_MASK) != 0) | |
1721 | usb_hcd_poll_rh_status (hcd); | |
1da177e4 LT |
1722 | return retval; |
1723 | } | |
1724 | ||
0c0382e3 | 1725 | static int dummy_bus_suspend (struct usb_hcd *hcd) |
391eca9d AS |
1726 | { |
1727 | struct dummy *dum = hcd_to_dummy (hcd); | |
1728 | ||
3cf0a22e AS |
1729 | dev_dbg (&hcd->self.root_hub->dev, "%s\n", __FUNCTION__); |
1730 | ||
391eca9d AS |
1731 | spin_lock_irq (&dum->lock); |
1732 | dum->rh_state = DUMMY_RH_SUSPENDED; | |
1733 | set_link_state (dum); | |
3cf0a22e | 1734 | hcd->state = HC_STATE_SUSPENDED; |
391eca9d AS |
1735 | spin_unlock_irq (&dum->lock); |
1736 | return 0; | |
1737 | } | |
1738 | ||
0c0382e3 | 1739 | static int dummy_bus_resume (struct usb_hcd *hcd) |
391eca9d AS |
1740 | { |
1741 | struct dummy *dum = hcd_to_dummy (hcd); | |
3cf0a22e AS |
1742 | int rc = 0; |
1743 | ||
1744 | dev_dbg (&hcd->self.root_hub->dev, "%s\n", __FUNCTION__); | |
391eca9d AS |
1745 | |
1746 | spin_lock_irq (&dum->lock); | |
3cf0a22e | 1747 | if (!test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags)) { |
cfa59dab | 1748 | rc = -ESHUTDOWN; |
3cf0a22e AS |
1749 | } else { |
1750 | dum->rh_state = DUMMY_RH_RUNNING; | |
1751 | set_link_state (dum); | |
1752 | if (!list_empty(&dum->urbp_list)) | |
1753 | mod_timer (&dum->timer, jiffies); | |
1754 | hcd->state = HC_STATE_RUNNING; | |
1755 | } | |
391eca9d | 1756 | spin_unlock_irq (&dum->lock); |
3cf0a22e | 1757 | return rc; |
391eca9d | 1758 | } |
1da177e4 LT |
1759 | |
1760 | /*-------------------------------------------------------------------------*/ | |
1761 | ||
1762 | static inline ssize_t | |
1763 | show_urb (char *buf, size_t size, struct urb *urb) | |
1764 | { | |
1765 | int ep = usb_pipeendpoint (urb->pipe); | |
1766 | ||
1767 | return snprintf (buf, size, | |
1768 | "urb/%p %s ep%d%s%s len %d/%d\n", | |
1769 | urb, | |
1770 | ({ char *s; | |
1771 | switch (urb->dev->speed) { | |
1772 | case USB_SPEED_LOW: s = "ls"; break; | |
1773 | case USB_SPEED_FULL: s = "fs"; break; | |
1774 | case USB_SPEED_HIGH: s = "hs"; break; | |
1775 | default: s = "?"; break; | |
1776 | }; s; }), | |
1777 | ep, ep ? (usb_pipein (urb->pipe) ? "in" : "out") : "", | |
1778 | ({ char *s; \ | |
1779 | switch (usb_pipetype (urb->pipe)) { \ | |
1780 | case PIPE_CONTROL: s = ""; break; \ | |
1781 | case PIPE_BULK: s = "-bulk"; break; \ | |
1782 | case PIPE_INTERRUPT: s = "-int"; break; \ | |
1783 | default: s = "-iso"; break; \ | |
1784 | }; s;}), | |
1785 | urb->actual_length, urb->transfer_buffer_length); | |
1786 | } | |
1787 | ||
1788 | static ssize_t | |
10523b3b | 1789 | show_urbs (struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
1790 | { |
1791 | struct usb_hcd *hcd = dev_get_drvdata (dev); | |
1792 | struct dummy *dum = hcd_to_dummy (hcd); | |
1793 | struct urbp *urbp; | |
1794 | size_t size = 0; | |
1795 | unsigned long flags; | |
1796 | ||
1797 | spin_lock_irqsave (&dum->lock, flags); | |
1798 | list_for_each_entry (urbp, &dum->urbp_list, urbp_list) { | |
1799 | size_t temp; | |
1800 | ||
1801 | temp = show_urb (buf, PAGE_SIZE - size, urbp->urb); | |
1802 | buf += temp; | |
1803 | size += temp; | |
1804 | } | |
1805 | spin_unlock_irqrestore (&dum->lock, flags); | |
1806 | ||
1807 | return size; | |
1808 | } | |
1809 | static DEVICE_ATTR (urbs, S_IRUGO, show_urbs, NULL); | |
1810 | ||
1811 | static int dummy_start (struct usb_hcd *hcd) | |
1812 | { | |
1813 | struct dummy *dum; | |
1da177e4 LT |
1814 | |
1815 | dum = hcd_to_dummy (hcd); | |
1816 | ||
1817 | /* | |
1818 | * MASTER side init ... we emulate a root hub that'll only ever | |
1819 | * talk to one device (the slave side). Also appears in sysfs, | |
1820 | * just like more familiar pci-based HCDs. | |
1821 | */ | |
1822 | spin_lock_init (&dum->lock); | |
1823 | init_timer (&dum->timer); | |
1824 | dum->timer.function = dummy_timer; | |
1825 | dum->timer.data = (unsigned long) dum; | |
391eca9d | 1826 | dum->rh_state = DUMMY_RH_RUNNING; |
1da177e4 LT |
1827 | |
1828 | INIT_LIST_HEAD (&dum->urbp_list); | |
1829 | ||
bc96c0ad AS |
1830 | /* only show a low-power port: just 8mA */ |
1831 | hcd->power_budget = 8; | |
1da177e4 | 1832 | hcd->state = HC_STATE_RUNNING; |
685eb93f | 1833 | hcd->uses_new_polling = 1; |
1da177e4 | 1834 | |
5742b0c9 AS |
1835 | #ifdef CONFIG_USB_OTG |
1836 | hcd->self.otg_port = 1; | |
1837 | #endif | |
1838 | ||
1da177e4 | 1839 | /* FIXME 'urbs' should be a per-device thing, maybe in usbcore */ |
efd54a36 | 1840 | return device_create_file (dummy_dev(dum), &dev_attr_urbs); |
1da177e4 LT |
1841 | } |
1842 | ||
1843 | static void dummy_stop (struct usb_hcd *hcd) | |
1844 | { | |
1845 | struct dummy *dum; | |
1846 | ||
1847 | dum = hcd_to_dummy (hcd); | |
1848 | ||
1849 | device_remove_file (dummy_dev(dum), &dev_attr_urbs); | |
1da177e4 | 1850 | usb_gadget_unregister_driver (dum->driver); |
1da177e4 LT |
1851 | dev_info (dummy_dev(dum), "stopped\n"); |
1852 | } | |
1853 | ||
1854 | /*-------------------------------------------------------------------------*/ | |
1855 | ||
1856 | static int dummy_h_get_frame (struct usb_hcd *hcd) | |
1857 | { | |
1858 | return dummy_g_get_frame (NULL); | |
1859 | } | |
1860 | ||
1861 | static const struct hc_driver dummy_hcd = { | |
1862 | .description = (char *) driver_name, | |
1863 | .product_desc = "Dummy host controller", | |
1864 | .hcd_priv_size = sizeof(struct dummy), | |
1865 | ||
1866 | .flags = HCD_USB2, | |
1867 | ||
1868 | .start = dummy_start, | |
1869 | .stop = dummy_stop, | |
1870 | ||
1871 | .urb_enqueue = dummy_urb_enqueue, | |
1872 | .urb_dequeue = dummy_urb_dequeue, | |
1873 | ||
1874 | .get_frame_number = dummy_h_get_frame, | |
1875 | ||
1876 | .hub_status_data = dummy_hub_status, | |
1877 | .hub_control = dummy_hub_control, | |
0c0382e3 AS |
1878 | .bus_suspend = dummy_bus_suspend, |
1879 | .bus_resume = dummy_bus_resume, | |
1da177e4 LT |
1880 | }; |
1881 | ||
8364d6b0 | 1882 | static int dummy_hcd_probe(struct platform_device *pdev) |
1da177e4 LT |
1883 | { |
1884 | struct usb_hcd *hcd; | |
1885 | int retval; | |
1886 | ||
8364d6b0 | 1887 | dev_info(&pdev->dev, "%s, driver " DRIVER_VERSION "\n", driver_desc); |
1da177e4 | 1888 | |
8364d6b0 | 1889 | hcd = usb_create_hcd(&dummy_hcd, &pdev->dev, pdev->dev.bus_id); |
1da177e4 LT |
1890 | if (!hcd) |
1891 | return -ENOMEM; | |
1892 | the_controller = hcd_to_dummy (hcd); | |
1893 | ||
1894 | retval = usb_add_hcd(hcd, 0, 0); | |
1895 | if (retval != 0) { | |
1896 | usb_put_hcd (hcd); | |
1897 | the_controller = NULL; | |
1898 | } | |
1899 | return retval; | |
1900 | } | |
1901 | ||
8364d6b0 | 1902 | static int dummy_hcd_remove (struct platform_device *pdev) |
1da177e4 LT |
1903 | { |
1904 | struct usb_hcd *hcd; | |
1905 | ||
8364d6b0 | 1906 | hcd = platform_get_drvdata (pdev); |
1da177e4 LT |
1907 | usb_remove_hcd (hcd); |
1908 | usb_put_hcd (hcd); | |
1909 | the_controller = NULL; | |
d9b76251 | 1910 | return 0; |
1da177e4 LT |
1911 | } |
1912 | ||
8364d6b0 | 1913 | static int dummy_hcd_suspend (struct platform_device *pdev, pm_message_t state) |
391eca9d AS |
1914 | { |
1915 | struct usb_hcd *hcd; | |
3cf0a22e AS |
1916 | struct dummy *dum; |
1917 | int rc = 0; | |
391eca9d | 1918 | |
8364d6b0 | 1919 | dev_dbg (&pdev->dev, "%s\n", __FUNCTION__); |
391eca9d | 1920 | |
3cf0a22e AS |
1921 | hcd = platform_get_drvdata (pdev); |
1922 | dum = hcd_to_dummy (hcd); | |
1923 | if (dum->rh_state == DUMMY_RH_RUNNING) { | |
1924 | dev_warn(&pdev->dev, "Root hub isn't suspended!\n"); | |
1925 | rc = -EBUSY; | |
1926 | } else | |
1927 | clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags); | |
1928 | return rc; | |
391eca9d AS |
1929 | } |
1930 | ||
8364d6b0 | 1931 | static int dummy_hcd_resume (struct platform_device *pdev) |
391eca9d AS |
1932 | { |
1933 | struct usb_hcd *hcd; | |
1934 | ||
8364d6b0 | 1935 | dev_dbg (&pdev->dev, "%s\n", __FUNCTION__); |
391eca9d | 1936 | |
3cf0a22e AS |
1937 | hcd = platform_get_drvdata (pdev); |
1938 | set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags); | |
391eca9d AS |
1939 | usb_hcd_poll_rh_status (hcd); |
1940 | return 0; | |
1941 | } | |
1942 | ||
3ae5eaec | 1943 | static struct platform_driver dummy_hcd_driver = { |
d9b76251 AS |
1944 | .probe = dummy_hcd_probe, |
1945 | .remove = dummy_hcd_remove, | |
391eca9d AS |
1946 | .suspend = dummy_hcd_suspend, |
1947 | .resume = dummy_hcd_resume, | |
3ae5eaec RK |
1948 | .driver = { |
1949 | .name = (char *) driver_name, | |
1950 | .owner = THIS_MODULE, | |
1951 | }, | |
d9b76251 | 1952 | }; |
1da177e4 | 1953 | |
d9b76251 | 1954 | /*-------------------------------------------------------------------------*/ |
1da177e4 | 1955 | |
d9b76251 AS |
1956 | /* These don't need to do anything because the pdev structures are |
1957 | * statically allocated. */ | |
1958 | static void | |
1959 | dummy_udc_release (struct device *dev) {} | |
1da177e4 | 1960 | |
d9b76251 AS |
1961 | static void |
1962 | dummy_hcd_release (struct device *dev) {} | |
1963 | ||
1964 | static struct platform_device the_udc_pdev = { | |
1965 | .name = (char *) gadget_name, | |
1966 | .id = -1, | |
1967 | .dev = { | |
1968 | .release = dummy_udc_release, | |
1969 | }, | |
1970 | }; | |
1da177e4 | 1971 | |
d9b76251 AS |
1972 | static struct platform_device the_hcd_pdev = { |
1973 | .name = (char *) driver_name, | |
1974 | .id = -1, | |
1975 | .dev = { | |
1976 | .release = dummy_hcd_release, | |
1977 | }, | |
1978 | }; | |
1da177e4 LT |
1979 | |
1980 | static int __init init (void) | |
1981 | { | |
1982 | int retval; | |
1983 | ||
1984 | if (usb_disabled ()) | |
1985 | return -ENODEV; | |
d9b76251 | 1986 | |
3ae5eaec | 1987 | retval = platform_driver_register (&dummy_hcd_driver); |
d9b76251 | 1988 | if (retval < 0) |
1da177e4 | 1989 | return retval; |
d9b76251 | 1990 | |
3ae5eaec | 1991 | retval = platform_driver_register (&dummy_udc_driver); |
d9b76251 AS |
1992 | if (retval < 0) |
1993 | goto err_register_udc_driver; | |
1994 | ||
1995 | retval = platform_device_register (&the_hcd_pdev); | |
1996 | if (retval < 0) | |
1997 | goto err_register_hcd; | |
1998 | ||
1999 | retval = platform_device_register (&the_udc_pdev); | |
2000 | if (retval < 0) | |
2001 | goto err_register_udc; | |
2002 | return retval; | |
2003 | ||
2004 | err_register_udc: | |
2005 | platform_device_unregister (&the_hcd_pdev); | |
2006 | err_register_hcd: | |
3ae5eaec | 2007 | platform_driver_unregister (&dummy_udc_driver); |
d9b76251 | 2008 | err_register_udc_driver: |
3ae5eaec | 2009 | platform_driver_unregister (&dummy_hcd_driver); |
1da177e4 LT |
2010 | return retval; |
2011 | } | |
2012 | module_init (init); | |
2013 | ||
2014 | static void __exit cleanup (void) | |
2015 | { | |
d9b76251 AS |
2016 | platform_device_unregister (&the_udc_pdev); |
2017 | platform_device_unregister (&the_hcd_pdev); | |
3ae5eaec RK |
2018 | platform_driver_unregister (&dummy_udc_driver); |
2019 | platform_driver_unregister (&dummy_hcd_driver); | |
1da177e4 LT |
2020 | } |
2021 | module_exit (cleanup); |