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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 | 63 | |
caf29f62 AS |
64 | #define POWER_BUDGET 500 /* in mA; use 8 for low-power port testing */ |
65 | ||
1da177e4 LT |
66 | static const char driver_name [] = "dummy_hcd"; |
67 | static const char driver_desc [] = "USB Host+Gadget Emulator"; | |
68 | ||
69 | static const char gadget_name [] = "dummy_udc"; | |
70 | ||
71 | MODULE_DESCRIPTION (DRIVER_DESC); | |
72 | MODULE_AUTHOR ("David Brownell"); | |
73 | MODULE_LICENSE ("GPL"); | |
74 | ||
75 | /*-------------------------------------------------------------------------*/ | |
76 | ||
77 | /* gadget side driver data structres */ | |
78 | struct dummy_ep { | |
79 | struct list_head queue; | |
80 | unsigned long last_io; /* jiffies timestamp */ | |
81 | struct usb_gadget *gadget; | |
82 | const struct usb_endpoint_descriptor *desc; | |
83 | struct usb_ep ep; | |
84 | unsigned halted : 1; | |
85 | unsigned already_seen : 1; | |
86 | unsigned setup_stage : 1; | |
87 | }; | |
88 | ||
89 | struct dummy_request { | |
90 | struct list_head queue; /* ep's requests */ | |
91 | struct usb_request req; | |
92 | }; | |
93 | ||
94 | static inline struct dummy_ep *usb_ep_to_dummy_ep (struct usb_ep *_ep) | |
95 | { | |
96 | return container_of (_ep, struct dummy_ep, ep); | |
97 | } | |
98 | ||
99 | static inline struct dummy_request *usb_request_to_dummy_request | |
100 | (struct usb_request *_req) | |
101 | { | |
102 | return container_of (_req, struct dummy_request, req); | |
103 | } | |
104 | ||
105 | /*-------------------------------------------------------------------------*/ | |
106 | ||
107 | /* | |
108 | * Every device has ep0 for control requests, plus up to 30 more endpoints, | |
109 | * in one of two types: | |
110 | * | |
111 | * - Configurable: direction (in/out), type (bulk, iso, etc), and endpoint | |
112 | * number can be changed. Names like "ep-a" are used for this type. | |
113 | * | |
114 | * - Fixed Function: in other cases. some characteristics may be mutable; | |
115 | * that'd be hardware-specific. Names like "ep12out-bulk" are used. | |
116 | * | |
117 | * Gadget drivers are responsible for not setting up conflicting endpoint | |
118 | * configurations, illegal or unsupported packet lengths, and so on. | |
119 | */ | |
120 | ||
121 | static const char ep0name [] = "ep0"; | |
122 | ||
123 | static const char *const ep_name [] = { | |
124 | ep0name, /* everyone has ep0 */ | |
125 | ||
126 | /* act like a net2280: high speed, six configurable endpoints */ | |
127 | "ep-a", "ep-b", "ep-c", "ep-d", "ep-e", "ep-f", | |
128 | ||
129 | /* or like pxa250: fifteen fixed function endpoints */ | |
130 | "ep1in-bulk", "ep2out-bulk", "ep3in-iso", "ep4out-iso", "ep5in-int", | |
131 | "ep6in-bulk", "ep7out-bulk", "ep8in-iso", "ep9out-iso", "ep10in-int", | |
132 | "ep11in-bulk", "ep12out-bulk", "ep13in-iso", "ep14out-iso", | |
133 | "ep15in-int", | |
134 | ||
135 | /* or like sa1100: two fixed function endpoints */ | |
136 | "ep1out-bulk", "ep2in-bulk", | |
137 | }; | |
52950ed4 | 138 | #define DUMMY_ENDPOINTS ARRAY_SIZE(ep_name) |
1da177e4 | 139 | |
d9b76251 AS |
140 | /*-------------------------------------------------------------------------*/ |
141 | ||
1da177e4 LT |
142 | #define FIFO_SIZE 64 |
143 | ||
144 | struct urbp { | |
145 | struct urb *urb; | |
146 | struct list_head urbp_list; | |
147 | }; | |
148 | ||
391eca9d AS |
149 | |
150 | enum dummy_rh_state { | |
151 | DUMMY_RH_RESET, | |
152 | DUMMY_RH_SUSPENDED, | |
153 | DUMMY_RH_RUNNING | |
154 | }; | |
155 | ||
1da177e4 LT |
156 | struct dummy { |
157 | spinlock_t lock; | |
158 | ||
159 | /* | |
160 | * SLAVE/GADGET side support | |
161 | */ | |
162 | struct dummy_ep ep [DUMMY_ENDPOINTS]; | |
163 | int address; | |
164 | struct usb_gadget gadget; | |
165 | struct usb_gadget_driver *driver; | |
166 | struct dummy_request fifo_req; | |
167 | u8 fifo_buf [FIFO_SIZE]; | |
168 | u16 devstatus; | |
391eca9d | 169 | unsigned udc_suspended:1; |
f1c39fad AS |
170 | unsigned pullup:1; |
171 | unsigned active:1; | |
172 | unsigned old_active:1; | |
1da177e4 LT |
173 | |
174 | /* | |
175 | * MASTER/HOST side support | |
176 | */ | |
391eca9d | 177 | enum dummy_rh_state rh_state; |
1da177e4 LT |
178 | struct timer_list timer; |
179 | u32 port_status; | |
f1c39fad | 180 | u32 old_status; |
1da177e4 LT |
181 | unsigned resuming:1; |
182 | unsigned long re_timeout; | |
183 | ||
184 | struct usb_device *udev; | |
185 | struct list_head urbp_list; | |
186 | }; | |
187 | ||
188 | static inline struct dummy *hcd_to_dummy (struct usb_hcd *hcd) | |
189 | { | |
190 | return (struct dummy *) (hcd->hcd_priv); | |
191 | } | |
192 | ||
193 | static inline struct usb_hcd *dummy_to_hcd (struct dummy *dum) | |
194 | { | |
195 | return container_of((void *) dum, struct usb_hcd, hcd_priv); | |
196 | } | |
197 | ||
198 | static inline struct device *dummy_dev (struct dummy *dum) | |
199 | { | |
200 | return dummy_to_hcd(dum)->self.controller; | |
201 | } | |
202 | ||
d9b76251 AS |
203 | static inline struct device *udc_dev (struct dummy *dum) |
204 | { | |
205 | return dum->gadget.dev.parent; | |
206 | } | |
207 | ||
1da177e4 LT |
208 | static inline struct dummy *ep_to_dummy (struct dummy_ep *ep) |
209 | { | |
210 | return container_of (ep->gadget, struct dummy, gadget); | |
211 | } | |
212 | ||
213 | static inline struct dummy *gadget_to_dummy (struct usb_gadget *gadget) | |
214 | { | |
215 | return container_of (gadget, struct dummy, gadget); | |
216 | } | |
217 | ||
218 | static inline struct dummy *gadget_dev_to_dummy (struct device *dev) | |
219 | { | |
220 | return container_of (dev, struct dummy, gadget.dev); | |
221 | } | |
222 | ||
223 | static struct dummy *the_controller; | |
224 | ||
225 | /*-------------------------------------------------------------------------*/ | |
226 | ||
f1c39fad AS |
227 | /* SLAVE/GADGET SIDE UTILITY ROUTINES */ |
228 | ||
229 | /* called with spinlock held */ | |
230 | static void nuke (struct dummy *dum, struct dummy_ep *ep) | |
231 | { | |
232 | while (!list_empty (&ep->queue)) { | |
233 | struct dummy_request *req; | |
234 | ||
235 | req = list_entry (ep->queue.next, struct dummy_request, queue); | |
236 | list_del_init (&req->queue); | |
237 | req->req.status = -ESHUTDOWN; | |
238 | ||
239 | spin_unlock (&dum->lock); | |
240 | req->req.complete (&ep->ep, &req->req); | |
241 | spin_lock (&dum->lock); | |
242 | } | |
243 | } | |
244 | ||
245 | /* caller must hold lock */ | |
246 | static void | |
247 | stop_activity (struct dummy *dum) | |
248 | { | |
249 | struct dummy_ep *ep; | |
250 | ||
251 | /* prevent any more requests */ | |
252 | dum->address = 0; | |
253 | ||
254 | /* The timer is left running so that outstanding URBs can fail */ | |
255 | ||
256 | /* nuke any pending requests first, so driver i/o is quiesced */ | |
257 | list_for_each_entry (ep, &dum->gadget.ep_list, ep.ep_list) | |
258 | nuke (dum, ep); | |
259 | ||
260 | /* driver now does any non-usb quiescing necessary */ | |
261 | } | |
262 | ||
263 | /* caller must hold lock */ | |
264 | static void | |
265 | set_link_state (struct dummy *dum) | |
266 | { | |
267 | dum->active = 0; | |
268 | if ((dum->port_status & USB_PORT_STAT_POWER) == 0) | |
269 | dum->port_status = 0; | |
391eca9d AS |
270 | |
271 | /* UDC suspend must cause a disconnect */ | |
272 | else if (!dum->pullup || dum->udc_suspended) { | |
f1c39fad AS |
273 | dum->port_status &= ~(USB_PORT_STAT_CONNECTION | |
274 | USB_PORT_STAT_ENABLE | | |
275 | USB_PORT_STAT_LOW_SPEED | | |
276 | USB_PORT_STAT_HIGH_SPEED | | |
277 | USB_PORT_STAT_SUSPEND); | |
278 | if ((dum->old_status & USB_PORT_STAT_CONNECTION) != 0) | |
279 | dum->port_status |= (USB_PORT_STAT_C_CONNECTION << 16); | |
280 | } else { | |
281 | dum->port_status |= USB_PORT_STAT_CONNECTION; | |
282 | if ((dum->old_status & USB_PORT_STAT_CONNECTION) == 0) | |
283 | dum->port_status |= (USB_PORT_STAT_C_CONNECTION << 16); | |
284 | if ((dum->port_status & USB_PORT_STAT_ENABLE) == 0) | |
285 | dum->port_status &= ~USB_PORT_STAT_SUSPEND; | |
391eca9d AS |
286 | else if ((dum->port_status & USB_PORT_STAT_SUSPEND) == 0 && |
287 | dum->rh_state != DUMMY_RH_SUSPENDED) | |
f1c39fad AS |
288 | dum->active = 1; |
289 | } | |
290 | ||
291 | if ((dum->port_status & USB_PORT_STAT_ENABLE) == 0 || dum->active) | |
292 | dum->resuming = 0; | |
293 | ||
294 | if ((dum->port_status & USB_PORT_STAT_CONNECTION) == 0 || | |
295 | (dum->port_status & USB_PORT_STAT_RESET) != 0) { | |
296 | if ((dum->old_status & USB_PORT_STAT_CONNECTION) != 0 && | |
297 | (dum->old_status & USB_PORT_STAT_RESET) == 0 && | |
298 | dum->driver) { | |
299 | stop_activity (dum); | |
300 | spin_unlock (&dum->lock); | |
301 | dum->driver->disconnect (&dum->gadget); | |
302 | spin_lock (&dum->lock); | |
303 | } | |
304 | } else if (dum->active != dum->old_active) { | |
305 | if (dum->old_active && dum->driver->suspend) { | |
306 | spin_unlock (&dum->lock); | |
307 | dum->driver->suspend (&dum->gadget); | |
308 | spin_lock (&dum->lock); | |
309 | } else if (!dum->old_active && dum->driver->resume) { | |
310 | spin_unlock (&dum->lock); | |
311 | dum->driver->resume (&dum->gadget); | |
312 | spin_lock (&dum->lock); | |
313 | } | |
314 | } | |
315 | ||
316 | dum->old_status = dum->port_status; | |
317 | dum->old_active = dum->active; | |
318 | } | |
319 | ||
320 | /*-------------------------------------------------------------------------*/ | |
321 | ||
1da177e4 LT |
322 | /* SLAVE/GADGET SIDE DRIVER |
323 | * | |
324 | * This only tracks gadget state. All the work is done when the host | |
325 | * side tries some (emulated) i/o operation. Real device controller | |
326 | * drivers would do real i/o using dma, fifos, irqs, timers, etc. | |
327 | */ | |
328 | ||
329 | #define is_enabled(dum) \ | |
330 | (dum->port_status & USB_PORT_STAT_ENABLE) | |
331 | ||
332 | static int | |
333 | dummy_enable (struct usb_ep *_ep, const struct usb_endpoint_descriptor *desc) | |
334 | { | |
335 | struct dummy *dum; | |
336 | struct dummy_ep *ep; | |
337 | unsigned max; | |
338 | int retval; | |
339 | ||
340 | ep = usb_ep_to_dummy_ep (_ep); | |
341 | if (!_ep || !desc || ep->desc || _ep->name == ep0name | |
342 | || desc->bDescriptorType != USB_DT_ENDPOINT) | |
343 | return -EINVAL; | |
344 | dum = ep_to_dummy (ep); | |
345 | if (!dum->driver || !is_enabled (dum)) | |
346 | return -ESHUTDOWN; | |
347 | max = le16_to_cpu(desc->wMaxPacketSize) & 0x3ff; | |
348 | ||
349 | /* drivers must not request bad settings, since lower levels | |
350 | * (hardware or its drivers) may not check. some endpoints | |
351 | * can't do iso, many have maxpacket limitations, etc. | |
352 | * | |
353 | * since this "hardware" driver is here to help debugging, we | |
354 | * have some extra sanity checks. (there could be more though, | |
355 | * especially for "ep9out" style fixed function ones.) | |
356 | */ | |
357 | retval = -EINVAL; | |
358 | switch (desc->bmAttributes & 0x03) { | |
359 | case USB_ENDPOINT_XFER_BULK: | |
360 | if (strstr (ep->ep.name, "-iso") | |
361 | || strstr (ep->ep.name, "-int")) { | |
362 | goto done; | |
363 | } | |
364 | switch (dum->gadget.speed) { | |
365 | case USB_SPEED_HIGH: | |
366 | if (max == 512) | |
367 | break; | |
9063ff44 IL |
368 | goto done; |
369 | case USB_SPEED_FULL: | |
370 | if (max == 8 || max == 16 || max == 32 || max == 64) | |
1da177e4 LT |
371 | /* we'll fake any legal size */ |
372 | break; | |
9063ff44 IL |
373 | /* save a return statement */ |
374 | default: | |
375 | goto done; | |
1da177e4 LT |
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 | ||
c728df70 | 545 | list_add_tail(&req->queue, &ep->queue); |
1da177e4 LT |
546 | spin_unlock (&dum->lock); |
547 | _req->actual = _req->length; | |
548 | _req->status = 0; | |
549 | _req->complete (_ep, _req); | |
550 | spin_lock (&dum->lock); | |
c728df70 DB |
551 | } else |
552 | list_add_tail(&req->queue, &ep->queue); | |
1da177e4 LT |
553 | spin_unlock_irqrestore (&dum->lock, flags); |
554 | ||
555 | /* real hardware would likely enable transfers here, in case | |
556 | * it'd been left NAKing. | |
557 | */ | |
558 | return 0; | |
559 | } | |
560 | ||
561 | static int dummy_dequeue (struct usb_ep *_ep, struct usb_request *_req) | |
562 | { | |
563 | struct dummy_ep *ep; | |
564 | struct dummy *dum; | |
565 | int retval = -EINVAL; | |
566 | unsigned long flags; | |
567 | struct dummy_request *req = NULL; | |
568 | ||
569 | if (!_ep || !_req) | |
570 | return retval; | |
571 | ep = usb_ep_to_dummy_ep (_ep); | |
572 | dum = ep_to_dummy (ep); | |
573 | ||
574 | if (!dum->driver) | |
575 | return -ESHUTDOWN; | |
576 | ||
b4dbda1a AS |
577 | local_irq_save (flags); |
578 | spin_lock (&dum->lock); | |
1da177e4 LT |
579 | list_for_each_entry (req, &ep->queue, queue) { |
580 | if (&req->req == _req) { | |
581 | list_del_init (&req->queue); | |
582 | _req->status = -ECONNRESET; | |
583 | retval = 0; | |
584 | break; | |
585 | } | |
586 | } | |
b4dbda1a | 587 | spin_unlock (&dum->lock); |
1da177e4 LT |
588 | |
589 | if (retval == 0) { | |
d9b76251 | 590 | dev_dbg (udc_dev(dum), |
1da177e4 LT |
591 | "dequeued req %p from %s, len %d buf %p\n", |
592 | req, _ep->name, _req->length, _req->buf); | |
593 | _req->complete (_ep, _req); | |
594 | } | |
b4dbda1a | 595 | local_irq_restore (flags); |
1da177e4 LT |
596 | return retval; |
597 | } | |
598 | ||
599 | static int | |
600 | dummy_set_halt (struct usb_ep *_ep, int value) | |
601 | { | |
602 | struct dummy_ep *ep; | |
603 | struct dummy *dum; | |
604 | ||
605 | if (!_ep) | |
606 | return -EINVAL; | |
607 | ep = usb_ep_to_dummy_ep (_ep); | |
608 | dum = ep_to_dummy (ep); | |
609 | if (!dum->driver) | |
610 | return -ESHUTDOWN; | |
611 | if (!value) | |
612 | ep->halted = 0; | |
613 | else if (ep->desc && (ep->desc->bEndpointAddress & USB_DIR_IN) && | |
614 | !list_empty (&ep->queue)) | |
615 | return -EAGAIN; | |
616 | else | |
617 | ep->halted = 1; | |
618 | /* FIXME clear emulated data toggle too */ | |
619 | return 0; | |
620 | } | |
621 | ||
622 | static const struct usb_ep_ops dummy_ep_ops = { | |
623 | .enable = dummy_enable, | |
624 | .disable = dummy_disable, | |
625 | ||
626 | .alloc_request = dummy_alloc_request, | |
627 | .free_request = dummy_free_request, | |
628 | ||
1da177e4 LT |
629 | .queue = dummy_queue, |
630 | .dequeue = dummy_dequeue, | |
631 | ||
632 | .set_halt = dummy_set_halt, | |
633 | }; | |
634 | ||
635 | /*-------------------------------------------------------------------------*/ | |
636 | ||
637 | /* there are both host and device side versions of this call ... */ | |
638 | static int dummy_g_get_frame (struct usb_gadget *_gadget) | |
639 | { | |
640 | struct timeval tv; | |
641 | ||
642 | do_gettimeofday (&tv); | |
643 | return tv.tv_usec / 1000; | |
644 | } | |
645 | ||
646 | static int dummy_wakeup (struct usb_gadget *_gadget) | |
647 | { | |
648 | struct dummy *dum; | |
649 | ||
650 | dum = gadget_to_dummy (_gadget); | |
391eca9d | 651 | if (!(dum->devstatus & ( (1 << USB_DEVICE_B_HNP_ENABLE) |
5742b0c9 | 652 | | (1 << USB_DEVICE_REMOTE_WAKEUP)))) |
1da177e4 | 653 | return -EINVAL; |
391eca9d AS |
654 | if ((dum->port_status & USB_PORT_STAT_CONNECTION) == 0) |
655 | return -ENOLINK; | |
656 | if ((dum->port_status & USB_PORT_STAT_SUSPEND) == 0 && | |
657 | dum->rh_state != DUMMY_RH_SUSPENDED) | |
658 | return -EIO; | |
659 | ||
660 | /* FIXME: What if the root hub is suspended but the port isn't? */ | |
1da177e4 LT |
661 | |
662 | /* hub notices our request, issues downstream resume, etc */ | |
663 | dum->resuming = 1; | |
f1c39fad | 664 | dum->re_timeout = jiffies + msecs_to_jiffies(20); |
685eb93f | 665 | mod_timer (&dummy_to_hcd (dum)->rh_timer, dum->re_timeout); |
1da177e4 LT |
666 | return 0; |
667 | } | |
668 | ||
669 | static int dummy_set_selfpowered (struct usb_gadget *_gadget, int value) | |
670 | { | |
671 | struct dummy *dum; | |
672 | ||
673 | dum = gadget_to_dummy (_gadget); | |
674 | if (value) | |
675 | dum->devstatus |= (1 << USB_DEVICE_SELF_POWERED); | |
676 | else | |
677 | dum->devstatus &= ~(1 << USB_DEVICE_SELF_POWERED); | |
678 | return 0; | |
679 | } | |
680 | ||
f1c39fad AS |
681 | static int dummy_pullup (struct usb_gadget *_gadget, int value) |
682 | { | |
683 | struct dummy *dum; | |
684 | unsigned long flags; | |
685 | ||
686 | dum = gadget_to_dummy (_gadget); | |
687 | spin_lock_irqsave (&dum->lock, flags); | |
688 | dum->pullup = (value != 0); | |
689 | set_link_state (dum); | |
690 | spin_unlock_irqrestore (&dum->lock, flags); | |
685eb93f AS |
691 | |
692 | usb_hcd_poll_rh_status (dummy_to_hcd (dum)); | |
f1c39fad AS |
693 | return 0; |
694 | } | |
695 | ||
1da177e4 LT |
696 | static const struct usb_gadget_ops dummy_ops = { |
697 | .get_frame = dummy_g_get_frame, | |
698 | .wakeup = dummy_wakeup, | |
699 | .set_selfpowered = dummy_set_selfpowered, | |
f1c39fad | 700 | .pullup = dummy_pullup, |
1da177e4 LT |
701 | }; |
702 | ||
703 | /*-------------------------------------------------------------------------*/ | |
704 | ||
705 | /* "function" sysfs attribute */ | |
706 | static ssize_t | |
10523b3b | 707 | show_function (struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
708 | { |
709 | struct dummy *dum = gadget_dev_to_dummy (dev); | |
710 | ||
711 | if (!dum->driver || !dum->driver->function) | |
712 | return 0; | |
713 | return scnprintf (buf, PAGE_SIZE, "%s\n", dum->driver->function); | |
714 | } | |
cc095b0b | 715 | static DEVICE_ATTR (function, S_IRUGO, show_function, NULL); |
1da177e4 LT |
716 | |
717 | /*-------------------------------------------------------------------------*/ | |
718 | ||
719 | /* | |
720 | * Driver registration/unregistration. | |
721 | * | |
722 | * This is basically hardware-specific; there's usually only one real USB | |
723 | * device (not host) controller since that's how USB devices are intended | |
724 | * to work. So most implementations of these api calls will rely on the | |
725 | * fact that only one driver will ever bind to the hardware. But curious | |
726 | * hardware can be built with discrete components, so the gadget API doesn't | |
727 | * require that assumption. | |
728 | * | |
729 | * For this emulator, it might be convenient to create a usb slave device | |
730 | * for each driver that registers: just add to a big root hub. | |
731 | */ | |
732 | ||
1da177e4 LT |
733 | int |
734 | usb_gadget_register_driver (struct usb_gadget_driver *driver) | |
735 | { | |
736 | struct dummy *dum = the_controller; | |
737 | int retval, i; | |
738 | ||
739 | if (!dum) | |
740 | return -EINVAL; | |
741 | if (dum->driver) | |
742 | return -EBUSY; | |
6bea476c | 743 | if (!driver->bind || !driver->setup |
1da177e4 LT |
744 | || driver->speed == USB_SPEED_UNKNOWN) |
745 | return -EINVAL; | |
746 | ||
747 | /* | |
748 | * SLAVE side init ... the layer above hardware, which | |
749 | * can't enumerate without help from the driver we're binding. | |
750 | */ | |
5742b0c9 | 751 | |
1da177e4 | 752 | dum->devstatus = 0; |
1da177e4 LT |
753 | |
754 | INIT_LIST_HEAD (&dum->gadget.ep_list); | |
755 | for (i = 0; i < DUMMY_ENDPOINTS; i++) { | |
756 | struct dummy_ep *ep = &dum->ep [i]; | |
757 | ||
758 | if (!ep_name [i]) | |
759 | break; | |
760 | ep->ep.name = ep_name [i]; | |
761 | ep->ep.ops = &dummy_ep_ops; | |
762 | list_add_tail (&ep->ep.ep_list, &dum->gadget.ep_list); | |
763 | ep->halted = ep->already_seen = ep->setup_stage = 0; | |
764 | ep->ep.maxpacket = ~0; | |
765 | ep->last_io = jiffies; | |
766 | ep->gadget = &dum->gadget; | |
767 | ep->desc = NULL; | |
768 | INIT_LIST_HEAD (&ep->queue); | |
769 | } | |
770 | ||
771 | dum->gadget.ep0 = &dum->ep [0].ep; | |
772 | dum->ep [0].ep.maxpacket = 64; | |
773 | list_del_init (&dum->ep [0].ep.ep_list); | |
774 | INIT_LIST_HEAD(&dum->fifo_req.queue); | |
775 | ||
59331017 | 776 | driver->driver.bus = NULL; |
1da177e4 LT |
777 | dum->driver = driver; |
778 | dum->gadget.dev.driver = &driver->driver; | |
d9b76251 | 779 | dev_dbg (udc_dev(dum), "binding gadget driver '%s'\n", |
1da177e4 | 780 | driver->driver.name); |
59331017 AS |
781 | retval = driver->bind(&dum->gadget); |
782 | if (retval) { | |
783 | dum->driver = NULL; | |
784 | dum->gadget.dev.driver = NULL; | |
785 | return retval; | |
786 | } | |
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 LT |
795 | return 0; |
796 | } | |
797 | EXPORT_SYMBOL (usb_gadget_register_driver); | |
798 | ||
1da177e4 LT |
799 | int |
800 | usb_gadget_unregister_driver (struct usb_gadget_driver *driver) | |
801 | { | |
802 | struct dummy *dum = the_controller; | |
803 | unsigned long flags; | |
804 | ||
805 | if (!dum) | |
806 | return -ENODEV; | |
6bea476c | 807 | if (!driver || driver != dum->driver || !driver->unbind) |
1da177e4 LT |
808 | return -EINVAL; |
809 | ||
d9b76251 | 810 | dev_dbg (udc_dev(dum), "unregister gadget driver '%s'\n", |
1da177e4 LT |
811 | driver->driver.name); |
812 | ||
813 | spin_lock_irqsave (&dum->lock, flags); | |
f1c39fad AS |
814 | dum->pullup = 0; |
815 | set_link_state (dum); | |
1da177e4 LT |
816 | spin_unlock_irqrestore (&dum->lock, flags); |
817 | ||
818 | driver->unbind (&dum->gadget); | |
59331017 | 819 | dum->gadget.dev.driver = NULL; |
1da177e4 LT |
820 | dum->driver = NULL; |
821 | ||
f1c39fad AS |
822 | spin_lock_irqsave (&dum->lock, flags); |
823 | dum->pullup = 0; | |
824 | set_link_state (dum); | |
825 | spin_unlock_irqrestore (&dum->lock, flags); | |
826 | ||
685eb93f | 827 | usb_hcd_poll_rh_status (dummy_to_hcd (dum)); |
1da177e4 LT |
828 | return 0; |
829 | } | |
830 | EXPORT_SYMBOL (usb_gadget_unregister_driver); | |
831 | ||
832 | #undef is_enabled | |
833 | ||
cc095b0b AS |
834 | /* just declare this in any driver that really need it */ |
835 | extern int net2280_set_fifo_mode (struct usb_gadget *gadget, int mode); | |
836 | ||
1da177e4 LT |
837 | int net2280_set_fifo_mode (struct usb_gadget *gadget, int mode) |
838 | { | |
839 | return -ENOSYS; | |
840 | } | |
841 | EXPORT_SYMBOL (net2280_set_fifo_mode); | |
842 | ||
d9b76251 AS |
843 | |
844 | /* The gadget structure is stored inside the hcd structure and will be | |
845 | * released along with it. */ | |
846 | static void | |
847 | dummy_gadget_release (struct device *dev) | |
848 | { | |
d9b76251 AS |
849 | struct dummy *dum = gadget_dev_to_dummy (dev); |
850 | ||
17200583 | 851 | usb_put_hcd (dummy_to_hcd (dum)); |
d9b76251 AS |
852 | } |
853 | ||
8364d6b0 | 854 | static int dummy_udc_probe (struct platform_device *pdev) |
d9b76251 AS |
855 | { |
856 | struct dummy *dum = the_controller; | |
857 | int rc; | |
858 | ||
859 | dum->gadget.name = gadget_name; | |
860 | dum->gadget.ops = &dummy_ops; | |
861 | dum->gadget.is_dualspeed = 1; | |
862 | ||
863 | /* maybe claim OTG support, though we won't complete HNP */ | |
864 | dum->gadget.is_otg = (dummy_to_hcd(dum)->self.otg_port != 0); | |
865 | ||
0031a06e | 866 | dev_set_name(&dum->gadget.dev, "gadget"); |
8364d6b0 | 867 | dum->gadget.dev.parent = &pdev->dev; |
d9b76251 AS |
868 | dum->gadget.dev.release = dummy_gadget_release; |
869 | rc = device_register (&dum->gadget.dev); | |
870 | if (rc < 0) | |
871 | return rc; | |
872 | ||
17200583 | 873 | usb_get_hcd (dummy_to_hcd (dum)); |
d9b76251 | 874 | |
8364d6b0 | 875 | platform_set_drvdata (pdev, dum); |
efd54a36 AS |
876 | rc = device_create_file (&dum->gadget.dev, &dev_attr_function); |
877 | if (rc < 0) | |
878 | device_unregister (&dum->gadget.dev); | |
d9b76251 AS |
879 | return rc; |
880 | } | |
881 | ||
8364d6b0 | 882 | static int dummy_udc_remove (struct platform_device *pdev) |
d9b76251 | 883 | { |
8364d6b0 | 884 | struct dummy *dum = platform_get_drvdata (pdev); |
d9b76251 | 885 | |
8364d6b0 | 886 | platform_set_drvdata (pdev, NULL); |
d9b76251 AS |
887 | device_remove_file (&dum->gadget.dev, &dev_attr_function); |
888 | device_unregister (&dum->gadget.dev); | |
889 | return 0; | |
890 | } | |
891 | ||
8364d6b0 | 892 | static int dummy_udc_suspend (struct platform_device *pdev, pm_message_t state) |
391eca9d | 893 | { |
8364d6b0 | 894 | struct dummy *dum = platform_get_drvdata(pdev); |
391eca9d | 895 | |
441b62c1 | 896 | dev_dbg (&pdev->dev, "%s\n", __func__); |
391eca9d AS |
897 | spin_lock_irq (&dum->lock); |
898 | dum->udc_suspended = 1; | |
899 | set_link_state (dum); | |
900 | spin_unlock_irq (&dum->lock); | |
901 | ||
391eca9d AS |
902 | usb_hcd_poll_rh_status (dummy_to_hcd (dum)); |
903 | return 0; | |
904 | } | |
905 | ||
8364d6b0 | 906 | static int dummy_udc_resume (struct platform_device *pdev) |
391eca9d | 907 | { |
8364d6b0 | 908 | struct dummy *dum = platform_get_drvdata(pdev); |
391eca9d | 909 | |
441b62c1 | 910 | dev_dbg (&pdev->dev, "%s\n", __func__); |
391eca9d AS |
911 | spin_lock_irq (&dum->lock); |
912 | dum->udc_suspended = 0; | |
913 | set_link_state (dum); | |
914 | spin_unlock_irq (&dum->lock); | |
915 | ||
391eca9d AS |
916 | usb_hcd_poll_rh_status (dummy_to_hcd (dum)); |
917 | return 0; | |
918 | } | |
919 | ||
3ae5eaec | 920 | static struct platform_driver dummy_udc_driver = { |
d9b76251 AS |
921 | .probe = dummy_udc_probe, |
922 | .remove = dummy_udc_remove, | |
391eca9d AS |
923 | .suspend = dummy_udc_suspend, |
924 | .resume = dummy_udc_resume, | |
3ae5eaec RK |
925 | .driver = { |
926 | .name = (char *) gadget_name, | |
927 | .owner = THIS_MODULE, | |
928 | }, | |
d9b76251 AS |
929 | }; |
930 | ||
1da177e4 LT |
931 | /*-------------------------------------------------------------------------*/ |
932 | ||
933 | /* MASTER/HOST SIDE DRIVER | |
934 | * | |
935 | * this uses the hcd framework to hook up to host side drivers. | |
936 | * its root hub will only have one device, otherwise it acts like | |
937 | * a normal host controller. | |
938 | * | |
939 | * when urbs are queued, they're just stuck on a list that we | |
940 | * scan in a timer callback. that callback connects writes from | |
941 | * the host with reads from the device, and so on, based on the | |
942 | * usb 2.0 rules. | |
943 | */ | |
944 | ||
945 | static int dummy_urb_enqueue ( | |
946 | struct usb_hcd *hcd, | |
1da177e4 | 947 | struct urb *urb, |
55016f10 | 948 | gfp_t mem_flags |
1da177e4 LT |
949 | ) { |
950 | struct dummy *dum; | |
951 | struct urbp *urbp; | |
952 | unsigned long flags; | |
e9df41c5 | 953 | int rc; |
1da177e4 LT |
954 | |
955 | if (!urb->transfer_buffer && urb->transfer_buffer_length) | |
956 | return -EINVAL; | |
957 | ||
958 | urbp = kmalloc (sizeof *urbp, mem_flags); | |
959 | if (!urbp) | |
960 | return -ENOMEM; | |
961 | urbp->urb = urb; | |
962 | ||
963 | dum = hcd_to_dummy (hcd); | |
964 | spin_lock_irqsave (&dum->lock, flags); | |
e9df41c5 AS |
965 | rc = usb_hcd_link_urb_to_ep(hcd, urb); |
966 | if (rc) { | |
967 | kfree(urbp); | |
968 | goto done; | |
969 | } | |
1da177e4 LT |
970 | |
971 | if (!dum->udev) { | |
972 | dum->udev = urb->dev; | |
973 | usb_get_dev (dum->udev); | |
974 | } else if (unlikely (dum->udev != urb->dev)) | |
975 | dev_err (dummy_dev(dum), "usb_device address has changed!\n"); | |
976 | ||
977 | list_add_tail (&urbp->urbp_list, &dum->urbp_list); | |
978 | urb->hcpriv = urbp; | |
979 | if (usb_pipetype (urb->pipe) == PIPE_CONTROL) | |
980 | urb->error_count = 1; /* mark as a new urb */ | |
981 | ||
982 | /* kick the scheduler, it'll do the rest */ | |
983 | if (!timer_pending (&dum->timer)) | |
984 | mod_timer (&dum->timer, jiffies + 1); | |
985 | ||
e9df41c5 | 986 | done: |
63f991b2 | 987 | spin_unlock_irqrestore(&dum->lock, flags); |
e9df41c5 | 988 | return rc; |
1da177e4 LT |
989 | } |
990 | ||
e9df41c5 | 991 | static int dummy_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status) |
1da177e4 | 992 | { |
391eca9d AS |
993 | struct dummy *dum; |
994 | unsigned long flags; | |
e9df41c5 | 995 | int rc; |
391eca9d AS |
996 | |
997 | /* giveback happens automatically in timer callback, | |
998 | * so make sure the callback happens */ | |
999 | dum = hcd_to_dummy (hcd); | |
1000 | spin_lock_irqsave (&dum->lock, flags); | |
e9df41c5 AS |
1001 | |
1002 | rc = usb_hcd_check_unlink_urb(hcd, urb, status); | |
1003 | if (!rc && dum->rh_state != DUMMY_RH_RUNNING && | |
1004 | !list_empty(&dum->urbp_list)) | |
391eca9d | 1005 | mod_timer (&dum->timer, jiffies); |
e9df41c5 | 1006 | |
391eca9d | 1007 | spin_unlock_irqrestore (&dum->lock, flags); |
e9df41c5 | 1008 | return rc; |
1da177e4 LT |
1009 | } |
1010 | ||
1da177e4 LT |
1011 | /* transfer up to a frame's worth; caller must own lock */ |
1012 | static int | |
4d2f110c AS |
1013 | transfer(struct dummy *dum, struct urb *urb, struct dummy_ep *ep, int limit, |
1014 | int *status) | |
1da177e4 LT |
1015 | { |
1016 | struct dummy_request *req; | |
1017 | ||
1018 | top: | |
1019 | /* if there's no request queued, the device is NAKing; return */ | |
1020 | list_for_each_entry (req, &ep->queue, queue) { | |
1021 | unsigned host_len, dev_len, len; | |
1022 | int is_short, to_host; | |
1023 | int rescan = 0; | |
1024 | ||
1025 | /* 1..N packets of ep->ep.maxpacket each ... the last one | |
1026 | * may be short (including zero length). | |
1027 | * | |
1028 | * writer can send a zlp explicitly (length 0) or implicitly | |
1029 | * (length mod maxpacket zero, and 'zero' flag); they always | |
1030 | * terminate reads. | |
1031 | */ | |
1032 | host_len = urb->transfer_buffer_length - urb->actual_length; | |
1033 | dev_len = req->req.length - req->req.actual; | |
1034 | len = min (host_len, dev_len); | |
1035 | ||
1036 | /* FIXME update emulated data toggle too */ | |
1037 | ||
1038 | to_host = usb_pipein (urb->pipe); | |
1039 | if (unlikely (len == 0)) | |
1040 | is_short = 1; | |
1041 | else { | |
1042 | char *ubuf, *rbuf; | |
1043 | ||
1044 | /* not enough bandwidth left? */ | |
1045 | if (limit < ep->ep.maxpacket && limit < len) | |
1046 | break; | |
1047 | len = min (len, (unsigned) limit); | |
1048 | if (len == 0) | |
1049 | break; | |
1050 | ||
1051 | /* use an extra pass for the final short packet */ | |
1052 | if (len > ep->ep.maxpacket) { | |
1053 | rescan = 1; | |
1054 | len -= (len % ep->ep.maxpacket); | |
1055 | } | |
1056 | is_short = (len % ep->ep.maxpacket) != 0; | |
1057 | ||
1058 | /* else transfer packet(s) */ | |
1059 | ubuf = urb->transfer_buffer + urb->actual_length; | |
1060 | rbuf = req->req.buf + req->req.actual; | |
1061 | if (to_host) | |
1062 | memcpy (ubuf, rbuf, len); | |
1063 | else | |
1064 | memcpy (rbuf, ubuf, len); | |
1065 | ep->last_io = jiffies; | |
1066 | ||
1067 | limit -= len; | |
1068 | urb->actual_length += len; | |
1069 | req->req.actual += len; | |
1070 | } | |
1071 | ||
1072 | /* short packets terminate, maybe with overflow/underflow. | |
1073 | * it's only really an error to write too much. | |
1074 | * | |
1075 | * partially filling a buffer optionally blocks queue advances | |
1076 | * (so completion handlers can clean up the queue) but we don't | |
b0d9efba | 1077 | * need to emulate such data-in-flight. |
1da177e4 LT |
1078 | */ |
1079 | if (is_short) { | |
1080 | if (host_len == dev_len) { | |
1081 | req->req.status = 0; | |
4d2f110c | 1082 | *status = 0; |
1da177e4 LT |
1083 | } else if (to_host) { |
1084 | req->req.status = 0; | |
1085 | if (dev_len > host_len) | |
4d2f110c | 1086 | *status = -EOVERFLOW; |
1da177e4 | 1087 | else |
4d2f110c | 1088 | *status = 0; |
1da177e4 | 1089 | } else if (!to_host) { |
4d2f110c | 1090 | *status = 0; |
1da177e4 LT |
1091 | if (host_len > dev_len) |
1092 | req->req.status = -EOVERFLOW; | |
1093 | else | |
1094 | req->req.status = 0; | |
1095 | } | |
1096 | ||
1097 | /* many requests terminate without a short packet */ | |
1098 | } else { | |
1099 | if (req->req.length == req->req.actual | |
1100 | && !req->req.zero) | |
1101 | req->req.status = 0; | |
1102 | if (urb->transfer_buffer_length == urb->actual_length | |
1103 | && !(urb->transfer_flags | |
4d2f110c AS |
1104 | & URB_ZERO_PACKET)) |
1105 | *status = 0; | |
1da177e4 LT |
1106 | } |
1107 | ||
1108 | /* device side completion --> continuable */ | |
1109 | if (req->req.status != -EINPROGRESS) { | |
1110 | list_del_init (&req->queue); | |
1111 | ||
1112 | spin_unlock (&dum->lock); | |
1113 | req->req.complete (&ep->ep, &req->req); | |
1114 | spin_lock (&dum->lock); | |
1115 | ||
1116 | /* requests might have been unlinked... */ | |
1117 | rescan = 1; | |
1118 | } | |
1119 | ||
1120 | /* host side completion --> terminate */ | |
4d2f110c | 1121 | if (*status != -EINPROGRESS) |
1da177e4 LT |
1122 | break; |
1123 | ||
1124 | /* rescan to continue with any other queued i/o */ | |
1125 | if (rescan) | |
1126 | goto top; | |
1127 | } | |
1128 | return limit; | |
1129 | } | |
1130 | ||
1131 | static int periodic_bytes (struct dummy *dum, struct dummy_ep *ep) | |
1132 | { | |
1133 | int limit = ep->ep.maxpacket; | |
1134 | ||
1135 | if (dum->gadget.speed == USB_SPEED_HIGH) { | |
1136 | int tmp; | |
1137 | ||
1138 | /* high bandwidth mode */ | |
1139 | tmp = le16_to_cpu(ep->desc->wMaxPacketSize); | |
1da177e4 LT |
1140 | tmp = (tmp >> 11) & 0x03; |
1141 | tmp *= 8 /* applies to entire frame */; | |
1142 | limit += limit * tmp; | |
1143 | } | |
1144 | return limit; | |
1145 | } | |
1146 | ||
1147 | #define is_active(dum) ((dum->port_status & \ | |
1148 | (USB_PORT_STAT_CONNECTION | USB_PORT_STAT_ENABLE | \ | |
1149 | USB_PORT_STAT_SUSPEND)) \ | |
1150 | == (USB_PORT_STAT_CONNECTION | USB_PORT_STAT_ENABLE)) | |
1151 | ||
1152 | static struct dummy_ep *find_endpoint (struct dummy *dum, u8 address) | |
1153 | { | |
1154 | int i; | |
1155 | ||
1156 | if (!is_active (dum)) | |
1157 | return NULL; | |
1158 | if ((address & ~USB_DIR_IN) == 0) | |
1159 | return &dum->ep [0]; | |
1160 | for (i = 1; i < DUMMY_ENDPOINTS; i++) { | |
1161 | struct dummy_ep *ep = &dum->ep [i]; | |
1162 | ||
1163 | if (!ep->desc) | |
1164 | continue; | |
1165 | if (ep->desc->bEndpointAddress == address) | |
1166 | return ep; | |
1167 | } | |
1168 | return NULL; | |
1169 | } | |
1170 | ||
1171 | #undef is_active | |
1172 | ||
1173 | #define Dev_Request (USB_TYPE_STANDARD | USB_RECIP_DEVICE) | |
1174 | #define Dev_InRequest (Dev_Request | USB_DIR_IN) | |
1175 | #define Intf_Request (USB_TYPE_STANDARD | USB_RECIP_INTERFACE) | |
1176 | #define Intf_InRequest (Intf_Request | USB_DIR_IN) | |
1177 | #define Ep_Request (USB_TYPE_STANDARD | USB_RECIP_ENDPOINT) | |
1178 | #define Ep_InRequest (Ep_Request | USB_DIR_IN) | |
1179 | ||
1180 | /* drive both sides of the transfers; looks like irq handlers to | |
1181 | * both drivers except the callbacks aren't in_irq(). | |
1182 | */ | |
1183 | static void dummy_timer (unsigned long _dum) | |
1184 | { | |
1185 | struct dummy *dum = (struct dummy *) _dum; | |
1186 | struct urbp *urbp, *tmp; | |
1187 | unsigned long flags; | |
1188 | int limit, total; | |
1189 | int i; | |
1190 | ||
1191 | /* simplistic model for one frame's bandwidth */ | |
1192 | switch (dum->gadget.speed) { | |
1193 | case USB_SPEED_LOW: | |
1194 | total = 8/*bytes*/ * 12/*packets*/; | |
1195 | break; | |
1196 | case USB_SPEED_FULL: | |
1197 | total = 64/*bytes*/ * 19/*packets*/; | |
1198 | break; | |
1199 | case USB_SPEED_HIGH: | |
1200 | total = 512/*bytes*/ * 13/*packets*/ * 8/*uframes*/; | |
1201 | break; | |
1202 | default: | |
1203 | dev_err (dummy_dev(dum), "bogus device speed\n"); | |
1204 | return; | |
1205 | } | |
1206 | ||
1207 | /* FIXME if HZ != 1000 this will probably misbehave ... */ | |
1208 | ||
1209 | /* look at each urb queued by the host side driver */ | |
1210 | spin_lock_irqsave (&dum->lock, flags); | |
1211 | ||
1212 | if (!dum->udev) { | |
1213 | dev_err (dummy_dev(dum), | |
1214 | "timer fired with no URBs pending?\n"); | |
1215 | spin_unlock_irqrestore (&dum->lock, flags); | |
1216 | return; | |
1217 | } | |
1218 | ||
1219 | for (i = 0; i < DUMMY_ENDPOINTS; i++) { | |
1220 | if (!ep_name [i]) | |
1221 | break; | |
1222 | dum->ep [i].already_seen = 0; | |
1223 | } | |
1224 | ||
1225 | restart: | |
1226 | list_for_each_entry_safe (urbp, tmp, &dum->urbp_list, urbp_list) { | |
1227 | struct urb *urb; | |
1228 | struct dummy_request *req; | |
1229 | u8 address; | |
1230 | struct dummy_ep *ep = NULL; | |
1231 | int type; | |
4d2f110c | 1232 | int status = -EINPROGRESS; |
1da177e4 LT |
1233 | |
1234 | urb = urbp->urb; | |
eb231054 | 1235 | if (urb->unlinked) |
1da177e4 | 1236 | goto return_urb; |
eb231054 | 1237 | else if (dum->rh_state != DUMMY_RH_RUNNING) |
391eca9d | 1238 | continue; |
1da177e4 LT |
1239 | type = usb_pipetype (urb->pipe); |
1240 | ||
1241 | /* used up this frame's non-periodic bandwidth? | |
1242 | * FIXME there's infinite bandwidth for control and | |
1243 | * periodic transfers ... unrealistic. | |
1244 | */ | |
1245 | if (total <= 0 && type == PIPE_BULK) | |
1246 | continue; | |
1247 | ||
1248 | /* find the gadget's ep for this request (if configured) */ | |
1249 | address = usb_pipeendpoint (urb->pipe); | |
1250 | if (usb_pipein (urb->pipe)) | |
1251 | address |= USB_DIR_IN; | |
1252 | ep = find_endpoint(dum, address); | |
1253 | if (!ep) { | |
1254 | /* set_configuration() disagreement */ | |
1255 | dev_dbg (dummy_dev(dum), | |
1256 | "no ep configured for urb %p\n", | |
1257 | urb); | |
4d2f110c | 1258 | status = -EPROTO; |
1da177e4 LT |
1259 | goto return_urb; |
1260 | } | |
1261 | ||
1262 | if (ep->already_seen) | |
1263 | continue; | |
1264 | ep->already_seen = 1; | |
1265 | if (ep == &dum->ep [0] && urb->error_count) { | |
1266 | ep->setup_stage = 1; /* a new urb */ | |
1267 | urb->error_count = 0; | |
1268 | } | |
1269 | if (ep->halted && !ep->setup_stage) { | |
1270 | /* NOTE: must not be iso! */ | |
1271 | dev_dbg (dummy_dev(dum), "ep %s halted, urb %p\n", | |
1272 | ep->ep.name, urb); | |
4d2f110c | 1273 | status = -EPIPE; |
1da177e4 LT |
1274 | goto return_urb; |
1275 | } | |
1276 | /* FIXME make sure both ends agree on maxpacket */ | |
1277 | ||
1278 | /* handle control requests */ | |
1279 | if (ep == &dum->ep [0] && ep->setup_stage) { | |
1280 | struct usb_ctrlrequest setup; | |
1281 | int value = 1; | |
1282 | struct dummy_ep *ep2; | |
cc095b0b AS |
1283 | unsigned w_index; |
1284 | unsigned w_value; | |
1da177e4 LT |
1285 | |
1286 | setup = *(struct usb_ctrlrequest*) urb->setup_packet; | |
cc095b0b AS |
1287 | w_index = le16_to_cpu(setup.wIndex); |
1288 | w_value = le16_to_cpu(setup.wValue); | |
1289 | if (le16_to_cpu(setup.wLength) != | |
1290 | urb->transfer_buffer_length) { | |
4d2f110c | 1291 | status = -EOVERFLOW; |
1da177e4 LT |
1292 | goto return_urb; |
1293 | } | |
1294 | ||
1295 | /* paranoia, in case of stale queued data */ | |
1296 | list_for_each_entry (req, &ep->queue, queue) { | |
1297 | list_del_init (&req->queue); | |
1298 | req->req.status = -EOVERFLOW; | |
d9b76251 | 1299 | dev_dbg (udc_dev(dum), "stale req = %p\n", |
1da177e4 LT |
1300 | req); |
1301 | ||
1302 | spin_unlock (&dum->lock); | |
1303 | req->req.complete (&ep->ep, &req->req); | |
1304 | spin_lock (&dum->lock); | |
1305 | ep->already_seen = 0; | |
1306 | goto restart; | |
1307 | } | |
1308 | ||
1309 | /* gadget driver never sees set_address or operations | |
1310 | * on standard feature flags. some hardware doesn't | |
1311 | * even expose them. | |
1312 | */ | |
1313 | ep->last_io = jiffies; | |
1314 | ep->setup_stage = 0; | |
1315 | ep->halted = 0; | |
1316 | switch (setup.bRequest) { | |
1317 | case USB_REQ_SET_ADDRESS: | |
1318 | if (setup.bRequestType != Dev_Request) | |
1319 | break; | |
cc095b0b | 1320 | dum->address = w_value; |
4d2f110c | 1321 | status = 0; |
d9b76251 | 1322 | dev_dbg (udc_dev(dum), "set_address = %d\n", |
cc095b0b | 1323 | w_value); |
1da177e4 LT |
1324 | value = 0; |
1325 | break; | |
1326 | case USB_REQ_SET_FEATURE: | |
1327 | if (setup.bRequestType == Dev_Request) { | |
1328 | value = 0; | |
cc095b0b | 1329 | switch (w_value) { |
1da177e4 LT |
1330 | case USB_DEVICE_REMOTE_WAKEUP: |
1331 | break; | |
5742b0c9 AS |
1332 | case USB_DEVICE_B_HNP_ENABLE: |
1333 | dum->gadget.b_hnp_enable = 1; | |
1334 | break; | |
1335 | case USB_DEVICE_A_HNP_SUPPORT: | |
1336 | dum->gadget.a_hnp_support = 1; | |
1337 | break; | |
1338 | case USB_DEVICE_A_ALT_HNP_SUPPORT: | |
1339 | dum->gadget.a_alt_hnp_support | |
1340 | = 1; | |
1341 | break; | |
1da177e4 LT |
1342 | default: |
1343 | value = -EOPNOTSUPP; | |
1344 | } | |
1345 | if (value == 0) { | |
1346 | dum->devstatus |= | |
cc095b0b | 1347 | (1 << w_value); |
4d2f110c | 1348 | status = 0; |
1da177e4 LT |
1349 | } |
1350 | ||
1351 | } else if (setup.bRequestType == Ep_Request) { | |
1352 | // endpoint halt | |
cc095b0b | 1353 | ep2 = find_endpoint (dum, w_index); |
1da177e4 LT |
1354 | if (!ep2) { |
1355 | value = -EOPNOTSUPP; | |
1356 | break; | |
1357 | } | |
1358 | ep2->halted = 1; | |
1359 | value = 0; | |
4d2f110c | 1360 | status = 0; |
1da177e4 LT |
1361 | } |
1362 | break; | |
1363 | case USB_REQ_CLEAR_FEATURE: | |
1364 | if (setup.bRequestType == Dev_Request) { | |
cc095b0b | 1365 | switch (w_value) { |
1da177e4 LT |
1366 | case USB_DEVICE_REMOTE_WAKEUP: |
1367 | dum->devstatus &= ~(1 << | |
1368 | USB_DEVICE_REMOTE_WAKEUP); | |
1369 | value = 0; | |
4d2f110c | 1370 | status = 0; |
1da177e4 LT |
1371 | break; |
1372 | default: | |
1373 | value = -EOPNOTSUPP; | |
1374 | break; | |
1375 | } | |
1376 | } else if (setup.bRequestType == Ep_Request) { | |
1377 | // endpoint halt | |
cc095b0b | 1378 | ep2 = find_endpoint (dum, w_index); |
1da177e4 LT |
1379 | if (!ep2) { |
1380 | value = -EOPNOTSUPP; | |
1381 | break; | |
1382 | } | |
1383 | ep2->halted = 0; | |
1384 | value = 0; | |
4d2f110c | 1385 | status = 0; |
1da177e4 LT |
1386 | } |
1387 | break; | |
1388 | case USB_REQ_GET_STATUS: | |
1389 | if (setup.bRequestType == Dev_InRequest | |
1390 | || setup.bRequestType | |
1391 | == Intf_InRequest | |
1392 | || setup.bRequestType | |
1393 | == Ep_InRequest | |
1394 | ) { | |
1395 | char *buf; | |
1396 | ||
1397 | // device: remote wakeup, selfpowered | |
1398 | // interface: nothing | |
1399 | // endpoint: halt | |
1400 | buf = (char *)urb->transfer_buffer; | |
1401 | if (urb->transfer_buffer_length > 0) { | |
1402 | if (setup.bRequestType == | |
1403 | Ep_InRequest) { | |
cc095b0b | 1404 | ep2 = find_endpoint (dum, w_index); |
1da177e4 LT |
1405 | if (!ep2) { |
1406 | value = -EOPNOTSUPP; | |
1407 | break; | |
1408 | } | |
1409 | buf [0] = ep2->halted; | |
1410 | } else if (setup.bRequestType == | |
1411 | Dev_InRequest) { | |
1412 | buf [0] = (u8) | |
1413 | dum->devstatus; | |
1414 | } else | |
1415 | buf [0] = 0; | |
1416 | } | |
1417 | if (urb->transfer_buffer_length > 1) | |
1418 | buf [1] = 0; | |
1419 | urb->actual_length = min (2, | |
1420 | urb->transfer_buffer_length); | |
1421 | value = 0; | |
4d2f110c | 1422 | status = 0; |
1da177e4 LT |
1423 | } |
1424 | break; | |
1425 | } | |
1426 | ||
1427 | /* gadget driver handles all other requests. block | |
1428 | * until setup() returns; no reentrancy issues etc. | |
1429 | */ | |
1430 | if (value > 0) { | |
1431 | spin_unlock (&dum->lock); | |
1432 | value = dum->driver->setup (&dum->gadget, | |
1433 | &setup); | |
1434 | spin_lock (&dum->lock); | |
1435 | ||
1436 | if (value >= 0) { | |
1437 | /* no delays (max 64KB data stage) */ | |
1438 | limit = 64*1024; | |
1439 | goto treat_control_like_bulk; | |
1440 | } | |
1441 | /* error, see below */ | |
1442 | } | |
1443 | ||
1444 | if (value < 0) { | |
1445 | if (value != -EOPNOTSUPP) | |
d9b76251 | 1446 | dev_dbg (udc_dev(dum), |
1da177e4 LT |
1447 | "setup --> %d\n", |
1448 | value); | |
4d2f110c | 1449 | status = -EPIPE; |
1da177e4 LT |
1450 | urb->actual_length = 0; |
1451 | } | |
1452 | ||
1453 | goto return_urb; | |
1454 | } | |
1455 | ||
1456 | /* non-control requests */ | |
1457 | limit = total; | |
1458 | switch (usb_pipetype (urb->pipe)) { | |
1459 | case PIPE_ISOCHRONOUS: | |
1460 | /* FIXME is it urb->interval since the last xfer? | |
1461 | * use urb->iso_frame_desc[i]. | |
1462 | * complete whether or not ep has requests queued. | |
1463 | * report random errors, to debug drivers. | |
1464 | */ | |
1465 | limit = max (limit, periodic_bytes (dum, ep)); | |
4d2f110c | 1466 | status = -ENOSYS; |
1da177e4 LT |
1467 | break; |
1468 | ||
1469 | case PIPE_INTERRUPT: | |
1470 | /* FIXME is it urb->interval since the last xfer? | |
1471 | * this almost certainly polls too fast. | |
1472 | */ | |
1473 | limit = max (limit, periodic_bytes (dum, ep)); | |
1474 | /* FALLTHROUGH */ | |
1475 | ||
1476 | // case PIPE_BULK: case PIPE_CONTROL: | |
1477 | default: | |
1478 | treat_control_like_bulk: | |
1479 | ep->last_io = jiffies; | |
4d2f110c | 1480 | total = transfer(dum, urb, ep, limit, &status); |
1da177e4 LT |
1481 | break; |
1482 | } | |
1483 | ||
1484 | /* incomplete transfer? */ | |
4d2f110c | 1485 | if (status == -EINPROGRESS) |
1da177e4 LT |
1486 | continue; |
1487 | ||
1488 | return_urb: | |
1da177e4 LT |
1489 | list_del (&urbp->urbp_list); |
1490 | kfree (urbp); | |
1491 | if (ep) | |
1492 | ep->already_seen = ep->setup_stage = 0; | |
1493 | ||
e9df41c5 | 1494 | usb_hcd_unlink_urb_from_ep(dummy_to_hcd(dum), urb); |
1da177e4 | 1495 | spin_unlock (&dum->lock); |
4a00027d | 1496 | usb_hcd_giveback_urb(dummy_to_hcd(dum), urb, status); |
1da177e4 LT |
1497 | spin_lock (&dum->lock); |
1498 | ||
1499 | goto restart; | |
1500 | } | |
1501 | ||
391eca9d | 1502 | if (list_empty (&dum->urbp_list)) { |
1da177e4 LT |
1503 | usb_put_dev (dum->udev); |
1504 | dum->udev = NULL; | |
391eca9d AS |
1505 | } else if (dum->rh_state == DUMMY_RH_RUNNING) { |
1506 | /* want a 1 msec delay here */ | |
1507 | mod_timer (&dum->timer, jiffies + msecs_to_jiffies(1)); | |
1da177e4 LT |
1508 | } |
1509 | ||
1510 | spin_unlock_irqrestore (&dum->lock, flags); | |
1511 | } | |
1512 | ||
1513 | /*-------------------------------------------------------------------------*/ | |
1514 | ||
1515 | #define PORT_C_MASK \ | |
c2db8b5e AS |
1516 | ((USB_PORT_STAT_C_CONNECTION \ |
1517 | | USB_PORT_STAT_C_ENABLE \ | |
1518 | | USB_PORT_STAT_C_SUSPEND \ | |
1519 | | USB_PORT_STAT_C_OVERCURRENT \ | |
1520 | | USB_PORT_STAT_C_RESET) << 16) | |
1da177e4 LT |
1521 | |
1522 | static int dummy_hub_status (struct usb_hcd *hcd, char *buf) | |
1523 | { | |
1524 | struct dummy *dum; | |
1525 | unsigned long flags; | |
391eca9d | 1526 | int retval = 0; |
1da177e4 LT |
1527 | |
1528 | dum = hcd_to_dummy (hcd); | |
1529 | ||
1530 | spin_lock_irqsave (&dum->lock, flags); | |
3cf0a22e | 1531 | if (!test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags)) |
391eca9d | 1532 | goto done; |
f1c39fad AS |
1533 | |
1534 | if (dum->resuming && time_after_eq (jiffies, dum->re_timeout)) { | |
1535 | dum->port_status |= (USB_PORT_STAT_C_SUSPEND << 16); | |
1536 | dum->port_status &= ~USB_PORT_STAT_SUSPEND; | |
1537 | set_link_state (dum); | |
1538 | } | |
1539 | ||
391eca9d | 1540 | if ((dum->port_status & PORT_C_MASK) != 0) { |
1da177e4 LT |
1541 | *buf = (1 << 1); |
1542 | dev_dbg (dummy_dev(dum), "port status 0x%08x has changes\n", | |
391eca9d | 1543 | dum->port_status); |
1da177e4 | 1544 | retval = 1; |
391eca9d AS |
1545 | if (dum->rh_state == DUMMY_RH_SUSPENDED) |
1546 | usb_hcd_resume_root_hub (hcd); | |
1da177e4 | 1547 | } |
391eca9d | 1548 | done: |
1da177e4 LT |
1549 | spin_unlock_irqrestore (&dum->lock, flags); |
1550 | return retval; | |
1551 | } | |
1552 | ||
1553 | static inline void | |
1554 | hub_descriptor (struct usb_hub_descriptor *desc) | |
1555 | { | |
1556 | memset (desc, 0, sizeof *desc); | |
1557 | desc->bDescriptorType = 0x29; | |
1558 | desc->bDescLength = 9; | |
fd05e720 | 1559 | desc->wHubCharacteristics = cpu_to_le16(0x0001); |
1da177e4 LT |
1560 | desc->bNbrPorts = 1; |
1561 | desc->bitmap [0] = 0xff; | |
1562 | desc->bitmap [1] = 0xff; | |
1563 | } | |
1564 | ||
1565 | static int dummy_hub_control ( | |
1566 | struct usb_hcd *hcd, | |
1567 | u16 typeReq, | |
1568 | u16 wValue, | |
1569 | u16 wIndex, | |
1570 | char *buf, | |
1571 | u16 wLength | |
1572 | ) { | |
1573 | struct dummy *dum; | |
1574 | int retval = 0; | |
1575 | unsigned long flags; | |
1576 | ||
3cf0a22e | 1577 | if (!test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags)) |
391eca9d AS |
1578 | return -ETIMEDOUT; |
1579 | ||
1da177e4 LT |
1580 | dum = hcd_to_dummy (hcd); |
1581 | spin_lock_irqsave (&dum->lock, flags); | |
1582 | switch (typeReq) { | |
1583 | case ClearHubFeature: | |
1584 | break; | |
1585 | case ClearPortFeature: | |
1586 | switch (wValue) { | |
1587 | case USB_PORT_FEAT_SUSPEND: | |
c2db8b5e | 1588 | if (dum->port_status & USB_PORT_STAT_SUSPEND) { |
1da177e4 LT |
1589 | /* 20msec resume signaling */ |
1590 | dum->resuming = 1; | |
1591 | dum->re_timeout = jiffies + | |
f1c39fad | 1592 | msecs_to_jiffies(20); |
1da177e4 LT |
1593 | } |
1594 | break; | |
1595 | case USB_PORT_FEAT_POWER: | |
f1c39fad AS |
1596 | if (dum->port_status & USB_PORT_STAT_POWER) |
1597 | dev_dbg (dummy_dev(dum), "power-off\n"); | |
1598 | /* FALLS THROUGH */ | |
1da177e4 LT |
1599 | default: |
1600 | dum->port_status &= ~(1 << wValue); | |
f1c39fad | 1601 | set_link_state (dum); |
1da177e4 LT |
1602 | } |
1603 | break; | |
1604 | case GetHubDescriptor: | |
1605 | hub_descriptor ((struct usb_hub_descriptor *) buf); | |
1606 | break; | |
1607 | case GetHubStatus: | |
cc095b0b | 1608 | *(__le32 *) buf = __constant_cpu_to_le32 (0); |
1da177e4 LT |
1609 | break; |
1610 | case GetPortStatus: | |
1611 | if (wIndex != 1) | |
1612 | retval = -EPIPE; | |
1613 | ||
1614 | /* whoever resets or resumes must GetPortStatus to | |
1615 | * complete it!! | |
1616 | */ | |
f1c39fad AS |
1617 | if (dum->resuming && |
1618 | time_after_eq (jiffies, dum->re_timeout)) { | |
c2db8b5e AS |
1619 | dum->port_status |= (USB_PORT_STAT_C_SUSPEND << 16); |
1620 | dum->port_status &= ~USB_PORT_STAT_SUSPEND; | |
1da177e4 | 1621 | } |
f1c39fad AS |
1622 | if ((dum->port_status & USB_PORT_STAT_RESET) != 0 && |
1623 | time_after_eq (jiffies, dum->re_timeout)) { | |
c2db8b5e AS |
1624 | dum->port_status |= (USB_PORT_STAT_C_RESET << 16); |
1625 | dum->port_status &= ~USB_PORT_STAT_RESET; | |
f1c39fad | 1626 | if (dum->pullup) { |
1da177e4 LT |
1627 | dum->port_status |= USB_PORT_STAT_ENABLE; |
1628 | /* give it the best speed we agree on */ | |
1629 | dum->gadget.speed = dum->driver->speed; | |
1630 | dum->gadget.ep0->maxpacket = 64; | |
1631 | switch (dum->gadget.speed) { | |
1632 | case USB_SPEED_HIGH: | |
1633 | dum->port_status |= | |
1634 | USB_PORT_STAT_HIGH_SPEED; | |
1635 | break; | |
1636 | case USB_SPEED_LOW: | |
1637 | dum->gadget.ep0->maxpacket = 8; | |
1638 | dum->port_status |= | |
1639 | USB_PORT_STAT_LOW_SPEED; | |
1640 | break; | |
1641 | default: | |
1642 | dum->gadget.speed = USB_SPEED_FULL; | |
1643 | break; | |
1644 | } | |
1645 | } | |
1646 | } | |
f1c39fad | 1647 | set_link_state (dum); |
cc095b0b AS |
1648 | ((__le16 *) buf)[0] = cpu_to_le16 (dum->port_status); |
1649 | ((__le16 *) buf)[1] = cpu_to_le16 (dum->port_status >> 16); | |
1da177e4 LT |
1650 | break; |
1651 | case SetHubFeature: | |
1652 | retval = -EPIPE; | |
1653 | break; | |
1654 | case SetPortFeature: | |
1655 | switch (wValue) { | |
1656 | case USB_PORT_FEAT_SUSPEND: | |
f1c39fad | 1657 | if (dum->active) { |
c2db8b5e | 1658 | dum->port_status |= USB_PORT_STAT_SUSPEND; |
f1c39fad AS |
1659 | |
1660 | /* HNP would happen here; for now we | |
1661 | * assume b_bus_req is always true. | |
1662 | */ | |
1663 | set_link_state (dum); | |
1664 | if (((1 << USB_DEVICE_B_HNP_ENABLE) | |
1665 | & dum->devstatus) != 0) | |
1666 | dev_dbg (dummy_dev(dum), | |
5742b0c9 | 1667 | "no HNP yet!\n"); |
1da177e4 LT |
1668 | } |
1669 | break; | |
f1c39fad AS |
1670 | case USB_PORT_FEAT_POWER: |
1671 | dum->port_status |= USB_PORT_STAT_POWER; | |
1672 | set_link_state (dum); | |
1673 | break; | |
1da177e4 | 1674 | case USB_PORT_FEAT_RESET: |
f1c39fad AS |
1675 | /* if it's already enabled, disable */ |
1676 | dum->port_status &= ~(USB_PORT_STAT_ENABLE | |
1677 | | USB_PORT_STAT_LOW_SPEED | |
1678 | | USB_PORT_STAT_HIGH_SPEED); | |
391eca9d | 1679 | dum->devstatus = 0; |
1da177e4 LT |
1680 | /* 50msec reset signaling */ |
1681 | dum->re_timeout = jiffies + msecs_to_jiffies(50); | |
f1c39fad | 1682 | /* FALLS THROUGH */ |
1da177e4 | 1683 | default: |
f1c39fad AS |
1684 | if ((dum->port_status & USB_PORT_STAT_POWER) != 0) { |
1685 | dum->port_status |= (1 << wValue); | |
1686 | set_link_state (dum); | |
1687 | } | |
1da177e4 LT |
1688 | } |
1689 | break; | |
1690 | ||
1691 | default: | |
1692 | dev_dbg (dummy_dev(dum), | |
1693 | "hub control req%04x v%04x i%04x l%d\n", | |
1694 | typeReq, wValue, wIndex, wLength); | |
1695 | ||
1696 | /* "protocol stall" on error */ | |
1697 | retval = -EPIPE; | |
1698 | } | |
1699 | spin_unlock_irqrestore (&dum->lock, flags); | |
685eb93f AS |
1700 | |
1701 | if ((dum->port_status & PORT_C_MASK) != 0) | |
1702 | usb_hcd_poll_rh_status (hcd); | |
1da177e4 LT |
1703 | return retval; |
1704 | } | |
1705 | ||
0c0382e3 | 1706 | static int dummy_bus_suspend (struct usb_hcd *hcd) |
391eca9d AS |
1707 | { |
1708 | struct dummy *dum = hcd_to_dummy (hcd); | |
1709 | ||
441b62c1 | 1710 | dev_dbg (&hcd->self.root_hub->dev, "%s\n", __func__); |
3cf0a22e | 1711 | |
391eca9d AS |
1712 | spin_lock_irq (&dum->lock); |
1713 | dum->rh_state = DUMMY_RH_SUSPENDED; | |
1714 | set_link_state (dum); | |
3cf0a22e | 1715 | hcd->state = HC_STATE_SUSPENDED; |
391eca9d AS |
1716 | spin_unlock_irq (&dum->lock); |
1717 | return 0; | |
1718 | } | |
1719 | ||
0c0382e3 | 1720 | static int dummy_bus_resume (struct usb_hcd *hcd) |
391eca9d AS |
1721 | { |
1722 | struct dummy *dum = hcd_to_dummy (hcd); | |
3cf0a22e AS |
1723 | int rc = 0; |
1724 | ||
441b62c1 | 1725 | dev_dbg (&hcd->self.root_hub->dev, "%s\n", __func__); |
391eca9d AS |
1726 | |
1727 | spin_lock_irq (&dum->lock); | |
3cf0a22e | 1728 | if (!test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags)) { |
cfa59dab | 1729 | rc = -ESHUTDOWN; |
3cf0a22e AS |
1730 | } else { |
1731 | dum->rh_state = DUMMY_RH_RUNNING; | |
1732 | set_link_state (dum); | |
1733 | if (!list_empty(&dum->urbp_list)) | |
1734 | mod_timer (&dum->timer, jiffies); | |
1735 | hcd->state = HC_STATE_RUNNING; | |
1736 | } | |
391eca9d | 1737 | spin_unlock_irq (&dum->lock); |
3cf0a22e | 1738 | return rc; |
391eca9d | 1739 | } |
1da177e4 LT |
1740 | |
1741 | /*-------------------------------------------------------------------------*/ | |
1742 | ||
1743 | static inline ssize_t | |
1744 | show_urb (char *buf, size_t size, struct urb *urb) | |
1745 | { | |
1746 | int ep = usb_pipeendpoint (urb->pipe); | |
1747 | ||
1748 | return snprintf (buf, size, | |
1749 | "urb/%p %s ep%d%s%s len %d/%d\n", | |
1750 | urb, | |
1751 | ({ char *s; | |
1752 | switch (urb->dev->speed) { | |
1753 | case USB_SPEED_LOW: s = "ls"; break; | |
1754 | case USB_SPEED_FULL: s = "fs"; break; | |
1755 | case USB_SPEED_HIGH: s = "hs"; break; | |
1756 | default: s = "?"; break; | |
1757 | }; s; }), | |
1758 | ep, ep ? (usb_pipein (urb->pipe) ? "in" : "out") : "", | |
1759 | ({ char *s; \ | |
1760 | switch (usb_pipetype (urb->pipe)) { \ | |
1761 | case PIPE_CONTROL: s = ""; break; \ | |
1762 | case PIPE_BULK: s = "-bulk"; break; \ | |
1763 | case PIPE_INTERRUPT: s = "-int"; break; \ | |
1764 | default: s = "-iso"; break; \ | |
1765 | }; s;}), | |
1766 | urb->actual_length, urb->transfer_buffer_length); | |
1767 | } | |
1768 | ||
1769 | static ssize_t | |
10523b3b | 1770 | show_urbs (struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
1771 | { |
1772 | struct usb_hcd *hcd = dev_get_drvdata (dev); | |
1773 | struct dummy *dum = hcd_to_dummy (hcd); | |
1774 | struct urbp *urbp; | |
1775 | size_t size = 0; | |
1776 | unsigned long flags; | |
1777 | ||
1778 | spin_lock_irqsave (&dum->lock, flags); | |
1779 | list_for_each_entry (urbp, &dum->urbp_list, urbp_list) { | |
1780 | size_t temp; | |
1781 | ||
1782 | temp = show_urb (buf, PAGE_SIZE - size, urbp->urb); | |
1783 | buf += temp; | |
1784 | size += temp; | |
1785 | } | |
1786 | spin_unlock_irqrestore (&dum->lock, flags); | |
1787 | ||
1788 | return size; | |
1789 | } | |
1790 | static DEVICE_ATTR (urbs, S_IRUGO, show_urbs, NULL); | |
1791 | ||
1792 | static int dummy_start (struct usb_hcd *hcd) | |
1793 | { | |
1794 | struct dummy *dum; | |
1da177e4 LT |
1795 | |
1796 | dum = hcd_to_dummy (hcd); | |
1797 | ||
1798 | /* | |
1799 | * MASTER side init ... we emulate a root hub that'll only ever | |
1800 | * talk to one device (the slave side). Also appears in sysfs, | |
1801 | * just like more familiar pci-based HCDs. | |
1802 | */ | |
1803 | spin_lock_init (&dum->lock); | |
1804 | init_timer (&dum->timer); | |
1805 | dum->timer.function = dummy_timer; | |
1806 | dum->timer.data = (unsigned long) dum; | |
391eca9d | 1807 | dum->rh_state = DUMMY_RH_RUNNING; |
1da177e4 LT |
1808 | |
1809 | INIT_LIST_HEAD (&dum->urbp_list); | |
1810 | ||
caf29f62 | 1811 | hcd->power_budget = POWER_BUDGET; |
1da177e4 | 1812 | hcd->state = HC_STATE_RUNNING; |
685eb93f | 1813 | hcd->uses_new_polling = 1; |
1da177e4 | 1814 | |
5742b0c9 AS |
1815 | #ifdef CONFIG_USB_OTG |
1816 | hcd->self.otg_port = 1; | |
1817 | #endif | |
1818 | ||
1da177e4 | 1819 | /* FIXME 'urbs' should be a per-device thing, maybe in usbcore */ |
efd54a36 | 1820 | return device_create_file (dummy_dev(dum), &dev_attr_urbs); |
1da177e4 LT |
1821 | } |
1822 | ||
1823 | static void dummy_stop (struct usb_hcd *hcd) | |
1824 | { | |
1825 | struct dummy *dum; | |
1826 | ||
1827 | dum = hcd_to_dummy (hcd); | |
1828 | ||
1829 | device_remove_file (dummy_dev(dum), &dev_attr_urbs); | |
1da177e4 | 1830 | usb_gadget_unregister_driver (dum->driver); |
1da177e4 LT |
1831 | dev_info (dummy_dev(dum), "stopped\n"); |
1832 | } | |
1833 | ||
1834 | /*-------------------------------------------------------------------------*/ | |
1835 | ||
1836 | static int dummy_h_get_frame (struct usb_hcd *hcd) | |
1837 | { | |
1838 | return dummy_g_get_frame (NULL); | |
1839 | } | |
1840 | ||
1841 | static const struct hc_driver dummy_hcd = { | |
1842 | .description = (char *) driver_name, | |
1843 | .product_desc = "Dummy host controller", | |
1844 | .hcd_priv_size = sizeof(struct dummy), | |
1845 | ||
1846 | .flags = HCD_USB2, | |
1847 | ||
1848 | .start = dummy_start, | |
1849 | .stop = dummy_stop, | |
1850 | ||
1851 | .urb_enqueue = dummy_urb_enqueue, | |
1852 | .urb_dequeue = dummy_urb_dequeue, | |
1853 | ||
1854 | .get_frame_number = dummy_h_get_frame, | |
1855 | ||
1856 | .hub_status_data = dummy_hub_status, | |
1857 | .hub_control = dummy_hub_control, | |
0c0382e3 AS |
1858 | .bus_suspend = dummy_bus_suspend, |
1859 | .bus_resume = dummy_bus_resume, | |
1da177e4 LT |
1860 | }; |
1861 | ||
8364d6b0 | 1862 | static int dummy_hcd_probe(struct platform_device *pdev) |
1da177e4 LT |
1863 | { |
1864 | struct usb_hcd *hcd; | |
1865 | int retval; | |
1866 | ||
8364d6b0 | 1867 | dev_info(&pdev->dev, "%s, driver " DRIVER_VERSION "\n", driver_desc); |
1da177e4 | 1868 | |
7071a3ce | 1869 | hcd = usb_create_hcd(&dummy_hcd, &pdev->dev, dev_name(&pdev->dev)); |
1da177e4 LT |
1870 | if (!hcd) |
1871 | return -ENOMEM; | |
1872 | the_controller = hcd_to_dummy (hcd); | |
1873 | ||
1874 | retval = usb_add_hcd(hcd, 0, 0); | |
1875 | if (retval != 0) { | |
1876 | usb_put_hcd (hcd); | |
1877 | the_controller = NULL; | |
1878 | } | |
1879 | return retval; | |
1880 | } | |
1881 | ||
8364d6b0 | 1882 | static int dummy_hcd_remove (struct platform_device *pdev) |
1da177e4 LT |
1883 | { |
1884 | struct usb_hcd *hcd; | |
1885 | ||
8364d6b0 | 1886 | hcd = platform_get_drvdata (pdev); |
1da177e4 LT |
1887 | usb_remove_hcd (hcd); |
1888 | usb_put_hcd (hcd); | |
1889 | the_controller = NULL; | |
d9b76251 | 1890 | return 0; |
1da177e4 LT |
1891 | } |
1892 | ||
8364d6b0 | 1893 | static int dummy_hcd_suspend (struct platform_device *pdev, pm_message_t state) |
391eca9d AS |
1894 | { |
1895 | struct usb_hcd *hcd; | |
3cf0a22e AS |
1896 | struct dummy *dum; |
1897 | int rc = 0; | |
391eca9d | 1898 | |
441b62c1 | 1899 | dev_dbg (&pdev->dev, "%s\n", __func__); |
391eca9d | 1900 | |
3cf0a22e AS |
1901 | hcd = platform_get_drvdata (pdev); |
1902 | dum = hcd_to_dummy (hcd); | |
1903 | if (dum->rh_state == DUMMY_RH_RUNNING) { | |
1904 | dev_warn(&pdev->dev, "Root hub isn't suspended!\n"); | |
1905 | rc = -EBUSY; | |
1906 | } else | |
1907 | clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags); | |
1908 | return rc; | |
391eca9d AS |
1909 | } |
1910 | ||
8364d6b0 | 1911 | static int dummy_hcd_resume (struct platform_device *pdev) |
391eca9d AS |
1912 | { |
1913 | struct usb_hcd *hcd; | |
1914 | ||
441b62c1 | 1915 | dev_dbg (&pdev->dev, "%s\n", __func__); |
391eca9d | 1916 | |
3cf0a22e AS |
1917 | hcd = platform_get_drvdata (pdev); |
1918 | set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags); | |
391eca9d AS |
1919 | usb_hcd_poll_rh_status (hcd); |
1920 | return 0; | |
1921 | } | |
1922 | ||
3ae5eaec | 1923 | static struct platform_driver dummy_hcd_driver = { |
d9b76251 AS |
1924 | .probe = dummy_hcd_probe, |
1925 | .remove = dummy_hcd_remove, | |
391eca9d AS |
1926 | .suspend = dummy_hcd_suspend, |
1927 | .resume = dummy_hcd_resume, | |
3ae5eaec RK |
1928 | .driver = { |
1929 | .name = (char *) driver_name, | |
1930 | .owner = THIS_MODULE, | |
1931 | }, | |
d9b76251 | 1932 | }; |
1da177e4 | 1933 | |
d9b76251 | 1934 | /*-------------------------------------------------------------------------*/ |
1da177e4 | 1935 | |
a89a2cd3 AS |
1936 | static struct platform_device *the_udc_pdev; |
1937 | static struct platform_device *the_hcd_pdev; | |
1da177e4 LT |
1938 | |
1939 | static int __init init (void) | |
1940 | { | |
a89a2cd3 | 1941 | int retval = -ENOMEM; |
1da177e4 LT |
1942 | |
1943 | if (usb_disabled ()) | |
1944 | return -ENODEV; | |
d9b76251 | 1945 | |
a89a2cd3 AS |
1946 | the_hcd_pdev = platform_device_alloc(driver_name, -1); |
1947 | if (!the_hcd_pdev) | |
1da177e4 | 1948 | return retval; |
a89a2cd3 AS |
1949 | the_udc_pdev = platform_device_alloc(gadget_name, -1); |
1950 | if (!the_udc_pdev) | |
1951 | goto err_alloc_udc; | |
d9b76251 | 1952 | |
a89a2cd3 AS |
1953 | retval = platform_driver_register(&dummy_hcd_driver); |
1954 | if (retval < 0) | |
1955 | goto err_register_hcd_driver; | |
1956 | retval = platform_driver_register(&dummy_udc_driver); | |
d9b76251 AS |
1957 | if (retval < 0) |
1958 | goto err_register_udc_driver; | |
1959 | ||
a89a2cd3 | 1960 | retval = platform_device_add(the_hcd_pdev); |
d9b76251 | 1961 | if (retval < 0) |
a89a2cd3 AS |
1962 | goto err_add_hcd; |
1963 | retval = platform_device_add(the_udc_pdev); | |
d9b76251 | 1964 | if (retval < 0) |
a89a2cd3 | 1965 | goto err_add_udc; |
d9b76251 AS |
1966 | return retval; |
1967 | ||
a89a2cd3 AS |
1968 | err_add_udc: |
1969 | platform_device_del(the_hcd_pdev); | |
1970 | err_add_hcd: | |
1971 | platform_driver_unregister(&dummy_udc_driver); | |
d9b76251 | 1972 | err_register_udc_driver: |
a89a2cd3 AS |
1973 | platform_driver_unregister(&dummy_hcd_driver); |
1974 | err_register_hcd_driver: | |
1975 | platform_device_put(the_udc_pdev); | |
1976 | err_alloc_udc: | |
1977 | platform_device_put(the_hcd_pdev); | |
1da177e4 LT |
1978 | return retval; |
1979 | } | |
1980 | module_init (init); | |
1981 | ||
1982 | static void __exit cleanup (void) | |
1983 | { | |
a89a2cd3 AS |
1984 | platform_device_unregister(the_udc_pdev); |
1985 | platform_device_unregister(the_hcd_pdev); | |
1986 | platform_driver_unregister(&dummy_udc_driver); | |
1987 | platform_driver_unregister(&dummy_hcd_driver); | |
1da177e4 LT |
1988 | } |
1989 | module_exit (cleanup); |