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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> |
27729aad | 50 | #include <linux/usb/hcd.h> |
1da177e4 LT |
51 | |
52 | #include <asm/byteorder.h> | |
53 | #include <asm/io.h> | |
54 | #include <asm/irq.h> | |
55 | #include <asm/system.h> | |
56 | #include <asm/unaligned.h> | |
57 | ||
58 | ||
1da177e4 | 59 | #define DRIVER_DESC "USB Host+Gadget Emulator" |
391eca9d | 60 | #define DRIVER_VERSION "02 May 2005" |
1da177e4 | 61 | |
caf29f62 AS |
62 | #define POWER_BUDGET 500 /* in mA; use 8 for low-power port testing */ |
63 | ||
1da177e4 LT |
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; | |
851a526d | 83 | unsigned wedged : 1; |
1da177e4 LT |
84 | unsigned already_seen : 1; |
85 | unsigned setup_stage : 1; | |
86 | }; | |
87 | ||
88 | struct dummy_request { | |
89 | struct list_head queue; /* ep's requests */ | |
90 | struct usb_request req; | |
91 | }; | |
92 | ||
93 | static inline struct dummy_ep *usb_ep_to_dummy_ep (struct usb_ep *_ep) | |
94 | { | |
95 | return container_of (_ep, struct dummy_ep, ep); | |
96 | } | |
97 | ||
98 | static inline struct dummy_request *usb_request_to_dummy_request | |
99 | (struct usb_request *_req) | |
100 | { | |
101 | return container_of (_req, struct dummy_request, req); | |
102 | } | |
103 | ||
104 | /*-------------------------------------------------------------------------*/ | |
105 | ||
106 | /* | |
107 | * Every device has ep0 for control requests, plus up to 30 more endpoints, | |
108 | * in one of two types: | |
109 | * | |
110 | * - Configurable: direction (in/out), type (bulk, iso, etc), and endpoint | |
111 | * number can be changed. Names like "ep-a" are used for this type. | |
112 | * | |
113 | * - Fixed Function: in other cases. some characteristics may be mutable; | |
114 | * that'd be hardware-specific. Names like "ep12out-bulk" are used. | |
115 | * | |
116 | * Gadget drivers are responsible for not setting up conflicting endpoint | |
117 | * configurations, illegal or unsupported packet lengths, and so on. | |
118 | */ | |
119 | ||
120 | static const char ep0name [] = "ep0"; | |
121 | ||
122 | static const char *const ep_name [] = { | |
123 | ep0name, /* everyone has ep0 */ | |
124 | ||
125 | /* act like a net2280: high speed, six configurable endpoints */ | |
126 | "ep-a", "ep-b", "ep-c", "ep-d", "ep-e", "ep-f", | |
127 | ||
128 | /* or like pxa250: fifteen fixed function endpoints */ | |
129 | "ep1in-bulk", "ep2out-bulk", "ep3in-iso", "ep4out-iso", "ep5in-int", | |
130 | "ep6in-bulk", "ep7out-bulk", "ep8in-iso", "ep9out-iso", "ep10in-int", | |
131 | "ep11in-bulk", "ep12out-bulk", "ep13in-iso", "ep14out-iso", | |
132 | "ep15in-int", | |
133 | ||
134 | /* or like sa1100: two fixed function endpoints */ | |
135 | "ep1out-bulk", "ep2in-bulk", | |
136 | }; | |
52950ed4 | 137 | #define DUMMY_ENDPOINTS ARRAY_SIZE(ep_name) |
1da177e4 | 138 | |
d9b76251 AS |
139 | /*-------------------------------------------------------------------------*/ |
140 | ||
1da177e4 LT |
141 | #define FIFO_SIZE 64 |
142 | ||
143 | struct urbp { | |
144 | struct urb *urb; | |
145 | struct list_head urbp_list; | |
146 | }; | |
147 | ||
391eca9d AS |
148 | |
149 | enum dummy_rh_state { | |
150 | DUMMY_RH_RESET, | |
151 | DUMMY_RH_SUSPENDED, | |
152 | DUMMY_RH_RUNNING | |
153 | }; | |
154 | ||
1da177e4 LT |
155 | struct dummy { |
156 | spinlock_t lock; | |
157 | ||
158 | /* | |
159 | * SLAVE/GADGET side support | |
160 | */ | |
161 | struct dummy_ep ep [DUMMY_ENDPOINTS]; | |
162 | int address; | |
163 | struct usb_gadget gadget; | |
164 | struct usb_gadget_driver *driver; | |
165 | struct dummy_request fifo_req; | |
166 | u8 fifo_buf [FIFO_SIZE]; | |
167 | u16 devstatus; | |
391eca9d | 168 | unsigned udc_suspended:1; |
f1c39fad AS |
169 | unsigned pullup:1; |
170 | unsigned active:1; | |
171 | unsigned old_active:1; | |
1da177e4 LT |
172 | |
173 | /* | |
174 | * MASTER/HOST side support | |
175 | */ | |
391eca9d | 176 | enum dummy_rh_state rh_state; |
1da177e4 LT |
177 | struct timer_list timer; |
178 | u32 port_status; | |
f1c39fad | 179 | u32 old_status; |
1da177e4 LT |
180 | unsigned resuming:1; |
181 | unsigned long re_timeout; | |
182 | ||
183 | struct usb_device *udev; | |
184 | struct list_head urbp_list; | |
185 | }; | |
186 | ||
187 | static inline struct dummy *hcd_to_dummy (struct usb_hcd *hcd) | |
188 | { | |
189 | return (struct dummy *) (hcd->hcd_priv); | |
190 | } | |
191 | ||
192 | static inline struct usb_hcd *dummy_to_hcd (struct dummy *dum) | |
193 | { | |
194 | return container_of((void *) dum, struct usb_hcd, hcd_priv); | |
195 | } | |
196 | ||
197 | static inline struct device *dummy_dev (struct dummy *dum) | |
198 | { | |
199 | return dummy_to_hcd(dum)->self.controller; | |
200 | } | |
201 | ||
d9b76251 AS |
202 | static inline struct device *udc_dev (struct dummy *dum) |
203 | { | |
204 | return dum->gadget.dev.parent; | |
205 | } | |
206 | ||
1da177e4 LT |
207 | static inline struct dummy *ep_to_dummy (struct dummy_ep *ep) |
208 | { | |
209 | return container_of (ep->gadget, struct dummy, gadget); | |
210 | } | |
211 | ||
212 | static inline struct dummy *gadget_to_dummy (struct usb_gadget *gadget) | |
213 | { | |
214 | return container_of (gadget, struct dummy, gadget); | |
215 | } | |
216 | ||
217 | static inline struct dummy *gadget_dev_to_dummy (struct device *dev) | |
218 | { | |
219 | return container_of (dev, struct dummy, gadget.dev); | |
220 | } | |
221 | ||
222 | static struct dummy *the_controller; | |
223 | ||
224 | /*-------------------------------------------------------------------------*/ | |
225 | ||
f1c39fad AS |
226 | /* SLAVE/GADGET SIDE UTILITY ROUTINES */ |
227 | ||
228 | /* called with spinlock held */ | |
229 | static void nuke (struct dummy *dum, struct dummy_ep *ep) | |
230 | { | |
231 | while (!list_empty (&ep->queue)) { | |
232 | struct dummy_request *req; | |
233 | ||
234 | req = list_entry (ep->queue.next, struct dummy_request, queue); | |
235 | list_del_init (&req->queue); | |
236 | req->req.status = -ESHUTDOWN; | |
237 | ||
238 | spin_unlock (&dum->lock); | |
239 | req->req.complete (&ep->ep, &req->req); | |
240 | spin_lock (&dum->lock); | |
241 | } | |
242 | } | |
243 | ||
244 | /* caller must hold lock */ | |
245 | static void | |
246 | stop_activity (struct dummy *dum) | |
247 | { | |
248 | struct dummy_ep *ep; | |
249 | ||
250 | /* prevent any more requests */ | |
251 | dum->address = 0; | |
252 | ||
253 | /* The timer is left running so that outstanding URBs can fail */ | |
254 | ||
255 | /* nuke any pending requests first, so driver i/o is quiesced */ | |
256 | list_for_each_entry (ep, &dum->gadget.ep_list, ep.ep_list) | |
257 | nuke (dum, ep); | |
258 | ||
259 | /* driver now does any non-usb quiescing necessary */ | |
260 | } | |
261 | ||
262 | /* caller must hold lock */ | |
263 | static void | |
264 | set_link_state (struct dummy *dum) | |
265 | { | |
266 | dum->active = 0; | |
267 | if ((dum->port_status & USB_PORT_STAT_POWER) == 0) | |
268 | dum->port_status = 0; | |
391eca9d AS |
269 | |
270 | /* UDC suspend must cause a disconnect */ | |
271 | else if (!dum->pullup || dum->udc_suspended) { | |
f1c39fad AS |
272 | dum->port_status &= ~(USB_PORT_STAT_CONNECTION | |
273 | USB_PORT_STAT_ENABLE | | |
274 | USB_PORT_STAT_LOW_SPEED | | |
275 | USB_PORT_STAT_HIGH_SPEED | | |
276 | USB_PORT_STAT_SUSPEND); | |
277 | if ((dum->old_status & USB_PORT_STAT_CONNECTION) != 0) | |
278 | dum->port_status |= (USB_PORT_STAT_C_CONNECTION << 16); | |
279 | } else { | |
280 | dum->port_status |= USB_PORT_STAT_CONNECTION; | |
281 | if ((dum->old_status & USB_PORT_STAT_CONNECTION) == 0) | |
282 | dum->port_status |= (USB_PORT_STAT_C_CONNECTION << 16); | |
283 | if ((dum->port_status & USB_PORT_STAT_ENABLE) == 0) | |
284 | dum->port_status &= ~USB_PORT_STAT_SUSPEND; | |
391eca9d AS |
285 | else if ((dum->port_status & USB_PORT_STAT_SUSPEND) == 0 && |
286 | dum->rh_state != DUMMY_RH_SUSPENDED) | |
f1c39fad AS |
287 | dum->active = 1; |
288 | } | |
289 | ||
290 | if ((dum->port_status & USB_PORT_STAT_ENABLE) == 0 || dum->active) | |
291 | dum->resuming = 0; | |
292 | ||
293 | if ((dum->port_status & USB_PORT_STAT_CONNECTION) == 0 || | |
294 | (dum->port_status & USB_PORT_STAT_RESET) != 0) { | |
295 | if ((dum->old_status & USB_PORT_STAT_CONNECTION) != 0 && | |
296 | (dum->old_status & USB_PORT_STAT_RESET) == 0 && | |
297 | dum->driver) { | |
298 | stop_activity (dum); | |
299 | spin_unlock (&dum->lock); | |
300 | dum->driver->disconnect (&dum->gadget); | |
301 | spin_lock (&dum->lock); | |
302 | } | |
303 | } else if (dum->active != dum->old_active) { | |
304 | if (dum->old_active && dum->driver->suspend) { | |
305 | spin_unlock (&dum->lock); | |
306 | dum->driver->suspend (&dum->gadget); | |
307 | spin_lock (&dum->lock); | |
308 | } else if (!dum->old_active && dum->driver->resume) { | |
309 | spin_unlock (&dum->lock); | |
310 | dum->driver->resume (&dum->gadget); | |
311 | spin_lock (&dum->lock); | |
312 | } | |
313 | } | |
314 | ||
315 | dum->old_status = dum->port_status; | |
316 | dum->old_active = dum->active; | |
317 | } | |
318 | ||
319 | /*-------------------------------------------------------------------------*/ | |
320 | ||
1da177e4 LT |
321 | /* SLAVE/GADGET SIDE DRIVER |
322 | * | |
323 | * This only tracks gadget state. All the work is done when the host | |
324 | * side tries some (emulated) i/o operation. Real device controller | |
325 | * drivers would do real i/o using dma, fifos, irqs, timers, etc. | |
326 | */ | |
327 | ||
328 | #define is_enabled(dum) \ | |
329 | (dum->port_status & USB_PORT_STAT_ENABLE) | |
330 | ||
331 | static int | |
332 | dummy_enable (struct usb_ep *_ep, const struct usb_endpoint_descriptor *desc) | |
333 | { | |
334 | struct dummy *dum; | |
335 | struct dummy_ep *ep; | |
336 | unsigned max; | |
337 | int retval; | |
338 | ||
339 | ep = usb_ep_to_dummy_ep (_ep); | |
340 | if (!_ep || !desc || ep->desc || _ep->name == ep0name | |
341 | || desc->bDescriptorType != USB_DT_ENDPOINT) | |
342 | return -EINVAL; | |
343 | dum = ep_to_dummy (ep); | |
344 | if (!dum->driver || !is_enabled (dum)) | |
345 | return -ESHUTDOWN; | |
346 | max = le16_to_cpu(desc->wMaxPacketSize) & 0x3ff; | |
347 | ||
348 | /* drivers must not request bad settings, since lower levels | |
349 | * (hardware or its drivers) may not check. some endpoints | |
350 | * can't do iso, many have maxpacket limitations, etc. | |
351 | * | |
352 | * since this "hardware" driver is here to help debugging, we | |
353 | * have some extra sanity checks. (there could be more though, | |
354 | * especially for "ep9out" style fixed function ones.) | |
355 | */ | |
356 | retval = -EINVAL; | |
357 | switch (desc->bmAttributes & 0x03) { | |
358 | case USB_ENDPOINT_XFER_BULK: | |
359 | if (strstr (ep->ep.name, "-iso") | |
360 | || strstr (ep->ep.name, "-int")) { | |
361 | goto done; | |
362 | } | |
363 | switch (dum->gadget.speed) { | |
364 | case USB_SPEED_HIGH: | |
365 | if (max == 512) | |
366 | break; | |
9063ff44 IL |
367 | goto done; |
368 | case USB_SPEED_FULL: | |
369 | if (max == 8 || max == 16 || max == 32 || max == 64) | |
1da177e4 LT |
370 | /* we'll fake any legal size */ |
371 | break; | |
9063ff44 IL |
372 | /* save a return statement */ |
373 | default: | |
374 | goto done; | |
1da177e4 LT |
375 | } |
376 | break; | |
377 | case USB_ENDPOINT_XFER_INT: | |
378 | if (strstr (ep->ep.name, "-iso")) /* bulk is ok */ | |
379 | goto done; | |
380 | /* real hardware might not handle all packet sizes */ | |
381 | switch (dum->gadget.speed) { | |
382 | case USB_SPEED_HIGH: | |
383 | if (max <= 1024) | |
384 | break; | |
385 | /* save a return statement */ | |
386 | case USB_SPEED_FULL: | |
387 | if (max <= 64) | |
388 | break; | |
389 | /* save a return statement */ | |
390 | default: | |
391 | if (max <= 8) | |
392 | break; | |
393 | goto done; | |
394 | } | |
395 | break; | |
396 | case USB_ENDPOINT_XFER_ISOC: | |
397 | if (strstr (ep->ep.name, "-bulk") | |
398 | || strstr (ep->ep.name, "-int")) | |
399 | goto done; | |
400 | /* real hardware might not handle all packet sizes */ | |
401 | switch (dum->gadget.speed) { | |
402 | case USB_SPEED_HIGH: | |
403 | if (max <= 1024) | |
404 | break; | |
405 | /* save a return statement */ | |
406 | case USB_SPEED_FULL: | |
407 | if (max <= 1023) | |
408 | break; | |
409 | /* save a return statement */ | |
410 | default: | |
411 | goto done; | |
412 | } | |
413 | break; | |
414 | default: | |
415 | /* few chips support control except on ep0 */ | |
416 | goto done; | |
417 | } | |
418 | ||
419 | _ep->maxpacket = max; | |
420 | ep->desc = desc; | |
421 | ||
d9b76251 | 422 | dev_dbg (udc_dev(dum), "enabled %s (ep%d%s-%s) maxpacket %d\n", |
1da177e4 LT |
423 | _ep->name, |
424 | desc->bEndpointAddress & 0x0f, | |
425 | (desc->bEndpointAddress & USB_DIR_IN) ? "in" : "out", | |
426 | ({ char *val; | |
427 | switch (desc->bmAttributes & 0x03) { | |
428 | case USB_ENDPOINT_XFER_BULK: val = "bulk"; break; | |
429 | case USB_ENDPOINT_XFER_ISOC: val = "iso"; break; | |
430 | case USB_ENDPOINT_XFER_INT: val = "intr"; break; | |
431 | default: val = "ctrl"; break; | |
432 | }; val; }), | |
433 | max); | |
434 | ||
435 | /* at this point real hardware should be NAKing transfers | |
436 | * to that endpoint, until a buffer is queued to it. | |
437 | */ | |
851a526d | 438 | ep->halted = ep->wedged = 0; |
1da177e4 LT |
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 | |
851a526d | 600 | dummy_set_halt_and_wedge(struct usb_ep *_ep, int value, int wedged) |
1da177e4 LT |
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) | |
851a526d | 612 | ep->halted = ep->wedged = 0; |
1da177e4 LT |
613 | else if (ep->desc && (ep->desc->bEndpointAddress & USB_DIR_IN) && |
614 | !list_empty (&ep->queue)) | |
615 | return -EAGAIN; | |
851a526d | 616 | else { |
1da177e4 | 617 | ep->halted = 1; |
851a526d AS |
618 | if (wedged) |
619 | ep->wedged = 1; | |
620 | } | |
1da177e4 LT |
621 | /* FIXME clear emulated data toggle too */ |
622 | return 0; | |
623 | } | |
624 | ||
851a526d AS |
625 | static int |
626 | dummy_set_halt(struct usb_ep *_ep, int value) | |
627 | { | |
628 | return dummy_set_halt_and_wedge(_ep, value, 0); | |
629 | } | |
630 | ||
631 | static int dummy_set_wedge(struct usb_ep *_ep) | |
632 | { | |
633 | if (!_ep || _ep->name == ep0name) | |
634 | return -EINVAL; | |
635 | return dummy_set_halt_and_wedge(_ep, 1, 1); | |
636 | } | |
637 | ||
1da177e4 LT |
638 | static const struct usb_ep_ops dummy_ep_ops = { |
639 | .enable = dummy_enable, | |
640 | .disable = dummy_disable, | |
641 | ||
642 | .alloc_request = dummy_alloc_request, | |
643 | .free_request = dummy_free_request, | |
644 | ||
1da177e4 LT |
645 | .queue = dummy_queue, |
646 | .dequeue = dummy_dequeue, | |
647 | ||
648 | .set_halt = dummy_set_halt, | |
851a526d | 649 | .set_wedge = dummy_set_wedge, |
1da177e4 LT |
650 | }; |
651 | ||
652 | /*-------------------------------------------------------------------------*/ | |
653 | ||
654 | /* there are both host and device side versions of this call ... */ | |
655 | static int dummy_g_get_frame (struct usb_gadget *_gadget) | |
656 | { | |
657 | struct timeval tv; | |
658 | ||
659 | do_gettimeofday (&tv); | |
660 | return tv.tv_usec / 1000; | |
661 | } | |
662 | ||
663 | static int dummy_wakeup (struct usb_gadget *_gadget) | |
664 | { | |
665 | struct dummy *dum; | |
666 | ||
667 | dum = gadget_to_dummy (_gadget); | |
391eca9d | 668 | if (!(dum->devstatus & ( (1 << USB_DEVICE_B_HNP_ENABLE) |
5742b0c9 | 669 | | (1 << USB_DEVICE_REMOTE_WAKEUP)))) |
1da177e4 | 670 | return -EINVAL; |
391eca9d AS |
671 | if ((dum->port_status & USB_PORT_STAT_CONNECTION) == 0) |
672 | return -ENOLINK; | |
673 | if ((dum->port_status & USB_PORT_STAT_SUSPEND) == 0 && | |
674 | dum->rh_state != DUMMY_RH_SUSPENDED) | |
675 | return -EIO; | |
676 | ||
677 | /* FIXME: What if the root hub is suspended but the port isn't? */ | |
1da177e4 LT |
678 | |
679 | /* hub notices our request, issues downstream resume, etc */ | |
680 | dum->resuming = 1; | |
f1c39fad | 681 | dum->re_timeout = jiffies + msecs_to_jiffies(20); |
685eb93f | 682 | mod_timer (&dummy_to_hcd (dum)->rh_timer, dum->re_timeout); |
1da177e4 LT |
683 | return 0; |
684 | } | |
685 | ||
686 | static int dummy_set_selfpowered (struct usb_gadget *_gadget, int value) | |
687 | { | |
688 | struct dummy *dum; | |
689 | ||
690 | dum = gadget_to_dummy (_gadget); | |
691 | if (value) | |
692 | dum->devstatus |= (1 << USB_DEVICE_SELF_POWERED); | |
693 | else | |
694 | dum->devstatus &= ~(1 << USB_DEVICE_SELF_POWERED); | |
695 | return 0; | |
696 | } | |
697 | ||
f1c39fad AS |
698 | static int dummy_pullup (struct usb_gadget *_gadget, int value) |
699 | { | |
700 | struct dummy *dum; | |
701 | unsigned long flags; | |
702 | ||
703 | dum = gadget_to_dummy (_gadget); | |
704 | spin_lock_irqsave (&dum->lock, flags); | |
705 | dum->pullup = (value != 0); | |
706 | set_link_state (dum); | |
707 | spin_unlock_irqrestore (&dum->lock, flags); | |
685eb93f AS |
708 | |
709 | usb_hcd_poll_rh_status (dummy_to_hcd (dum)); | |
f1c39fad AS |
710 | return 0; |
711 | } | |
712 | ||
1da177e4 LT |
713 | static const struct usb_gadget_ops dummy_ops = { |
714 | .get_frame = dummy_g_get_frame, | |
715 | .wakeup = dummy_wakeup, | |
716 | .set_selfpowered = dummy_set_selfpowered, | |
f1c39fad | 717 | .pullup = dummy_pullup, |
1da177e4 LT |
718 | }; |
719 | ||
720 | /*-------------------------------------------------------------------------*/ | |
721 | ||
722 | /* "function" sysfs attribute */ | |
723 | static ssize_t | |
10523b3b | 724 | show_function (struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
725 | { |
726 | struct dummy *dum = gadget_dev_to_dummy (dev); | |
727 | ||
728 | if (!dum->driver || !dum->driver->function) | |
729 | return 0; | |
730 | return scnprintf (buf, PAGE_SIZE, "%s\n", dum->driver->function); | |
731 | } | |
cc095b0b | 732 | static DEVICE_ATTR (function, S_IRUGO, show_function, NULL); |
1da177e4 LT |
733 | |
734 | /*-------------------------------------------------------------------------*/ | |
735 | ||
736 | /* | |
737 | * Driver registration/unregistration. | |
738 | * | |
739 | * This is basically hardware-specific; there's usually only one real USB | |
740 | * device (not host) controller since that's how USB devices are intended | |
741 | * to work. So most implementations of these api calls will rely on the | |
742 | * fact that only one driver will ever bind to the hardware. But curious | |
743 | * hardware can be built with discrete components, so the gadget API doesn't | |
744 | * require that assumption. | |
745 | * | |
746 | * For this emulator, it might be convenient to create a usb slave device | |
747 | * for each driver that registers: just add to a big root hub. | |
748 | */ | |
749 | ||
1da177e4 | 750 | int |
b0fca50f UKK |
751 | usb_gadget_probe_driver(struct usb_gadget_driver *driver, |
752 | int (*bind)(struct usb_gadget *)) | |
1da177e4 LT |
753 | { |
754 | struct dummy *dum = the_controller; | |
755 | int retval, i; | |
756 | ||
757 | if (!dum) | |
758 | return -EINVAL; | |
759 | if (dum->driver) | |
760 | return -EBUSY; | |
b0fca50f | 761 | if (!bind || !driver->setup || driver->speed == USB_SPEED_UNKNOWN) |
1da177e4 LT |
762 | return -EINVAL; |
763 | ||
764 | /* | |
765 | * SLAVE side init ... the layer above hardware, which | |
766 | * can't enumerate without help from the driver we're binding. | |
767 | */ | |
5742b0c9 | 768 | |
1da177e4 | 769 | dum->devstatus = 0; |
1da177e4 LT |
770 | |
771 | INIT_LIST_HEAD (&dum->gadget.ep_list); | |
772 | for (i = 0; i < DUMMY_ENDPOINTS; i++) { | |
773 | struct dummy_ep *ep = &dum->ep [i]; | |
774 | ||
775 | if (!ep_name [i]) | |
776 | break; | |
777 | ep->ep.name = ep_name [i]; | |
778 | ep->ep.ops = &dummy_ep_ops; | |
779 | list_add_tail (&ep->ep.ep_list, &dum->gadget.ep_list); | |
851a526d AS |
780 | ep->halted = ep->wedged = ep->already_seen = |
781 | ep->setup_stage = 0; | |
1da177e4 LT |
782 | ep->ep.maxpacket = ~0; |
783 | ep->last_io = jiffies; | |
784 | ep->gadget = &dum->gadget; | |
785 | ep->desc = NULL; | |
786 | INIT_LIST_HEAD (&ep->queue); | |
787 | } | |
788 | ||
789 | dum->gadget.ep0 = &dum->ep [0].ep; | |
790 | dum->ep [0].ep.maxpacket = 64; | |
791 | list_del_init (&dum->ep [0].ep.ep_list); | |
792 | INIT_LIST_HEAD(&dum->fifo_req.queue); | |
793 | ||
59331017 | 794 | driver->driver.bus = NULL; |
1da177e4 LT |
795 | dum->driver = driver; |
796 | dum->gadget.dev.driver = &driver->driver; | |
d9b76251 | 797 | dev_dbg (udc_dev(dum), "binding gadget driver '%s'\n", |
1da177e4 | 798 | driver->driver.name); |
b0fca50f | 799 | retval = bind(&dum->gadget); |
59331017 AS |
800 | if (retval) { |
801 | dum->driver = NULL; | |
802 | dum->gadget.dev.driver = NULL; | |
803 | return retval; | |
804 | } | |
1da177e4 LT |
805 | |
806 | /* khubd will enumerate this in a while */ | |
f1c39fad AS |
807 | spin_lock_irq (&dum->lock); |
808 | dum->pullup = 1; | |
809 | set_link_state (dum); | |
810 | spin_unlock_irq (&dum->lock); | |
685eb93f AS |
811 | |
812 | usb_hcd_poll_rh_status (dummy_to_hcd (dum)); | |
1da177e4 LT |
813 | return 0; |
814 | } | |
b0fca50f | 815 | EXPORT_SYMBOL(usb_gadget_probe_driver); |
1da177e4 | 816 | |
1da177e4 LT |
817 | int |
818 | usb_gadget_unregister_driver (struct usb_gadget_driver *driver) | |
819 | { | |
820 | struct dummy *dum = the_controller; | |
821 | unsigned long flags; | |
822 | ||
823 | if (!dum) | |
824 | return -ENODEV; | |
6bea476c | 825 | if (!driver || driver != dum->driver || !driver->unbind) |
1da177e4 LT |
826 | return -EINVAL; |
827 | ||
d9b76251 | 828 | dev_dbg (udc_dev(dum), "unregister gadget driver '%s'\n", |
1da177e4 LT |
829 | driver->driver.name); |
830 | ||
831 | spin_lock_irqsave (&dum->lock, flags); | |
f1c39fad AS |
832 | dum->pullup = 0; |
833 | set_link_state (dum); | |
1da177e4 LT |
834 | spin_unlock_irqrestore (&dum->lock, flags); |
835 | ||
836 | driver->unbind (&dum->gadget); | |
59331017 | 837 | dum->gadget.dev.driver = NULL; |
1da177e4 LT |
838 | dum->driver = NULL; |
839 | ||
f1c39fad AS |
840 | spin_lock_irqsave (&dum->lock, flags); |
841 | dum->pullup = 0; | |
842 | set_link_state (dum); | |
843 | spin_unlock_irqrestore (&dum->lock, flags); | |
844 | ||
685eb93f | 845 | usb_hcd_poll_rh_status (dummy_to_hcd (dum)); |
1da177e4 LT |
846 | return 0; |
847 | } | |
848 | EXPORT_SYMBOL (usb_gadget_unregister_driver); | |
849 | ||
850 | #undef is_enabled | |
851 | ||
cc095b0b AS |
852 | /* just declare this in any driver that really need it */ |
853 | extern int net2280_set_fifo_mode (struct usb_gadget *gadget, int mode); | |
854 | ||
1da177e4 LT |
855 | int net2280_set_fifo_mode (struct usb_gadget *gadget, int mode) |
856 | { | |
857 | return -ENOSYS; | |
858 | } | |
859 | EXPORT_SYMBOL (net2280_set_fifo_mode); | |
860 | ||
d9b76251 AS |
861 | |
862 | /* The gadget structure is stored inside the hcd structure and will be | |
863 | * released along with it. */ | |
864 | static void | |
865 | dummy_gadget_release (struct device *dev) | |
866 | { | |
d9b76251 AS |
867 | struct dummy *dum = gadget_dev_to_dummy (dev); |
868 | ||
17200583 | 869 | usb_put_hcd (dummy_to_hcd (dum)); |
d9b76251 AS |
870 | } |
871 | ||
8364d6b0 | 872 | static int dummy_udc_probe (struct platform_device *pdev) |
d9b76251 AS |
873 | { |
874 | struct dummy *dum = the_controller; | |
875 | int rc; | |
876 | ||
75d87cdf RR |
877 | usb_get_hcd(dummy_to_hcd(dum)); |
878 | ||
d9b76251 AS |
879 | dum->gadget.name = gadget_name; |
880 | dum->gadget.ops = &dummy_ops; | |
881 | dum->gadget.is_dualspeed = 1; | |
882 | ||
883 | /* maybe claim OTG support, though we won't complete HNP */ | |
884 | dum->gadget.is_otg = (dummy_to_hcd(dum)->self.otg_port != 0); | |
885 | ||
0031a06e | 886 | dev_set_name(&dum->gadget.dev, "gadget"); |
8364d6b0 | 887 | dum->gadget.dev.parent = &pdev->dev; |
d9b76251 AS |
888 | dum->gadget.dev.release = dummy_gadget_release; |
889 | rc = device_register (&dum->gadget.dev); | |
75d87cdf RR |
890 | if (rc < 0) { |
891 | put_device(&dum->gadget.dev); | |
d9b76251 | 892 | return rc; |
75d87cdf | 893 | } |
d9b76251 | 894 | |
8364d6b0 | 895 | platform_set_drvdata (pdev, dum); |
efd54a36 AS |
896 | rc = device_create_file (&dum->gadget.dev, &dev_attr_function); |
897 | if (rc < 0) | |
898 | device_unregister (&dum->gadget.dev); | |
d9b76251 AS |
899 | return rc; |
900 | } | |
901 | ||
8364d6b0 | 902 | static int dummy_udc_remove (struct platform_device *pdev) |
d9b76251 | 903 | { |
8364d6b0 | 904 | struct dummy *dum = platform_get_drvdata (pdev); |
d9b76251 | 905 | |
8364d6b0 | 906 | platform_set_drvdata (pdev, NULL); |
d9b76251 AS |
907 | device_remove_file (&dum->gadget.dev, &dev_attr_function); |
908 | device_unregister (&dum->gadget.dev); | |
909 | return 0; | |
910 | } | |
911 | ||
8364d6b0 | 912 | static int dummy_udc_suspend (struct platform_device *pdev, pm_message_t state) |
391eca9d | 913 | { |
8364d6b0 | 914 | struct dummy *dum = platform_get_drvdata(pdev); |
391eca9d | 915 | |
441b62c1 | 916 | dev_dbg (&pdev->dev, "%s\n", __func__); |
391eca9d AS |
917 | spin_lock_irq (&dum->lock); |
918 | dum->udc_suspended = 1; | |
919 | set_link_state (dum); | |
920 | spin_unlock_irq (&dum->lock); | |
921 | ||
391eca9d AS |
922 | usb_hcd_poll_rh_status (dummy_to_hcd (dum)); |
923 | return 0; | |
924 | } | |
925 | ||
8364d6b0 | 926 | static int dummy_udc_resume (struct platform_device *pdev) |
391eca9d | 927 | { |
8364d6b0 | 928 | struct dummy *dum = platform_get_drvdata(pdev); |
391eca9d | 929 | |
441b62c1 | 930 | dev_dbg (&pdev->dev, "%s\n", __func__); |
391eca9d AS |
931 | spin_lock_irq (&dum->lock); |
932 | dum->udc_suspended = 0; | |
933 | set_link_state (dum); | |
934 | spin_unlock_irq (&dum->lock); | |
935 | ||
391eca9d AS |
936 | usb_hcd_poll_rh_status (dummy_to_hcd (dum)); |
937 | return 0; | |
938 | } | |
939 | ||
3ae5eaec | 940 | static struct platform_driver dummy_udc_driver = { |
d9b76251 AS |
941 | .probe = dummy_udc_probe, |
942 | .remove = dummy_udc_remove, | |
391eca9d AS |
943 | .suspend = dummy_udc_suspend, |
944 | .resume = dummy_udc_resume, | |
3ae5eaec RK |
945 | .driver = { |
946 | .name = (char *) gadget_name, | |
947 | .owner = THIS_MODULE, | |
948 | }, | |
d9b76251 AS |
949 | }; |
950 | ||
1da177e4 LT |
951 | /*-------------------------------------------------------------------------*/ |
952 | ||
953 | /* MASTER/HOST SIDE DRIVER | |
954 | * | |
955 | * this uses the hcd framework to hook up to host side drivers. | |
956 | * its root hub will only have one device, otherwise it acts like | |
957 | * a normal host controller. | |
958 | * | |
959 | * when urbs are queued, they're just stuck on a list that we | |
960 | * scan in a timer callback. that callback connects writes from | |
961 | * the host with reads from the device, and so on, based on the | |
962 | * usb 2.0 rules. | |
963 | */ | |
964 | ||
965 | static int dummy_urb_enqueue ( | |
966 | struct usb_hcd *hcd, | |
1da177e4 | 967 | struct urb *urb, |
55016f10 | 968 | gfp_t mem_flags |
1da177e4 LT |
969 | ) { |
970 | struct dummy *dum; | |
971 | struct urbp *urbp; | |
972 | unsigned long flags; | |
e9df41c5 | 973 | int rc; |
1da177e4 LT |
974 | |
975 | if (!urb->transfer_buffer && urb->transfer_buffer_length) | |
976 | return -EINVAL; | |
977 | ||
978 | urbp = kmalloc (sizeof *urbp, mem_flags); | |
979 | if (!urbp) | |
980 | return -ENOMEM; | |
981 | urbp->urb = urb; | |
982 | ||
983 | dum = hcd_to_dummy (hcd); | |
984 | spin_lock_irqsave (&dum->lock, flags); | |
e9df41c5 AS |
985 | rc = usb_hcd_link_urb_to_ep(hcd, urb); |
986 | if (rc) { | |
987 | kfree(urbp); | |
988 | goto done; | |
989 | } | |
1da177e4 LT |
990 | |
991 | if (!dum->udev) { | |
992 | dum->udev = urb->dev; | |
993 | usb_get_dev (dum->udev); | |
994 | } else if (unlikely (dum->udev != urb->dev)) | |
995 | dev_err (dummy_dev(dum), "usb_device address has changed!\n"); | |
996 | ||
997 | list_add_tail (&urbp->urbp_list, &dum->urbp_list); | |
998 | urb->hcpriv = urbp; | |
999 | if (usb_pipetype (urb->pipe) == PIPE_CONTROL) | |
1000 | urb->error_count = 1; /* mark as a new urb */ | |
1001 | ||
1002 | /* kick the scheduler, it'll do the rest */ | |
1003 | if (!timer_pending (&dum->timer)) | |
1004 | mod_timer (&dum->timer, jiffies + 1); | |
1005 | ||
e9df41c5 | 1006 | done: |
63f991b2 | 1007 | spin_unlock_irqrestore(&dum->lock, flags); |
e9df41c5 | 1008 | return rc; |
1da177e4 LT |
1009 | } |
1010 | ||
e9df41c5 | 1011 | static int dummy_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status) |
1da177e4 | 1012 | { |
391eca9d AS |
1013 | struct dummy *dum; |
1014 | unsigned long flags; | |
e9df41c5 | 1015 | int rc; |
391eca9d AS |
1016 | |
1017 | /* giveback happens automatically in timer callback, | |
1018 | * so make sure the callback happens */ | |
1019 | dum = hcd_to_dummy (hcd); | |
1020 | spin_lock_irqsave (&dum->lock, flags); | |
e9df41c5 AS |
1021 | |
1022 | rc = usb_hcd_check_unlink_urb(hcd, urb, status); | |
1023 | if (!rc && dum->rh_state != DUMMY_RH_RUNNING && | |
1024 | !list_empty(&dum->urbp_list)) | |
391eca9d | 1025 | mod_timer (&dum->timer, jiffies); |
e9df41c5 | 1026 | |
391eca9d | 1027 | spin_unlock_irqrestore (&dum->lock, flags); |
e9df41c5 | 1028 | return rc; |
1da177e4 LT |
1029 | } |
1030 | ||
1da177e4 LT |
1031 | /* transfer up to a frame's worth; caller must own lock */ |
1032 | static int | |
4d2f110c AS |
1033 | transfer(struct dummy *dum, struct urb *urb, struct dummy_ep *ep, int limit, |
1034 | int *status) | |
1da177e4 LT |
1035 | { |
1036 | struct dummy_request *req; | |
1037 | ||
1038 | top: | |
1039 | /* if there's no request queued, the device is NAKing; return */ | |
1040 | list_for_each_entry (req, &ep->queue, queue) { | |
1041 | unsigned host_len, dev_len, len; | |
1042 | int is_short, to_host; | |
1043 | int rescan = 0; | |
1044 | ||
1045 | /* 1..N packets of ep->ep.maxpacket each ... the last one | |
1046 | * may be short (including zero length). | |
1047 | * | |
1048 | * writer can send a zlp explicitly (length 0) or implicitly | |
1049 | * (length mod maxpacket zero, and 'zero' flag); they always | |
1050 | * terminate reads. | |
1051 | */ | |
1052 | host_len = urb->transfer_buffer_length - urb->actual_length; | |
1053 | dev_len = req->req.length - req->req.actual; | |
1054 | len = min (host_len, dev_len); | |
1055 | ||
1056 | /* FIXME update emulated data toggle too */ | |
1057 | ||
1058 | to_host = usb_pipein (urb->pipe); | |
1059 | if (unlikely (len == 0)) | |
1060 | is_short = 1; | |
1061 | else { | |
1062 | char *ubuf, *rbuf; | |
1063 | ||
1064 | /* not enough bandwidth left? */ | |
1065 | if (limit < ep->ep.maxpacket && limit < len) | |
1066 | break; | |
1067 | len = min (len, (unsigned) limit); | |
1068 | if (len == 0) | |
1069 | break; | |
1070 | ||
1071 | /* use an extra pass for the final short packet */ | |
1072 | if (len > ep->ep.maxpacket) { | |
1073 | rescan = 1; | |
1074 | len -= (len % ep->ep.maxpacket); | |
1075 | } | |
1076 | is_short = (len % ep->ep.maxpacket) != 0; | |
1077 | ||
1078 | /* else transfer packet(s) */ | |
1079 | ubuf = urb->transfer_buffer + urb->actual_length; | |
1080 | rbuf = req->req.buf + req->req.actual; | |
1081 | if (to_host) | |
1082 | memcpy (ubuf, rbuf, len); | |
1083 | else | |
1084 | memcpy (rbuf, ubuf, len); | |
1085 | ep->last_io = jiffies; | |
1086 | ||
1087 | limit -= len; | |
1088 | urb->actual_length += len; | |
1089 | req->req.actual += len; | |
1090 | } | |
1091 | ||
1092 | /* short packets terminate, maybe with overflow/underflow. | |
1093 | * it's only really an error to write too much. | |
1094 | * | |
1095 | * partially filling a buffer optionally blocks queue advances | |
1096 | * (so completion handlers can clean up the queue) but we don't | |
b0d9efba | 1097 | * need to emulate such data-in-flight. |
1da177e4 LT |
1098 | */ |
1099 | if (is_short) { | |
1100 | if (host_len == dev_len) { | |
1101 | req->req.status = 0; | |
4d2f110c | 1102 | *status = 0; |
1da177e4 LT |
1103 | } else if (to_host) { |
1104 | req->req.status = 0; | |
1105 | if (dev_len > host_len) | |
4d2f110c | 1106 | *status = -EOVERFLOW; |
1da177e4 | 1107 | else |
4d2f110c | 1108 | *status = 0; |
1da177e4 | 1109 | } else if (!to_host) { |
4d2f110c | 1110 | *status = 0; |
1da177e4 LT |
1111 | if (host_len > dev_len) |
1112 | req->req.status = -EOVERFLOW; | |
1113 | else | |
1114 | req->req.status = 0; | |
1115 | } | |
1116 | ||
1117 | /* many requests terminate without a short packet */ | |
1118 | } else { | |
1119 | if (req->req.length == req->req.actual | |
1120 | && !req->req.zero) | |
1121 | req->req.status = 0; | |
1122 | if (urb->transfer_buffer_length == urb->actual_length | |
1123 | && !(urb->transfer_flags | |
4d2f110c AS |
1124 | & URB_ZERO_PACKET)) |
1125 | *status = 0; | |
1da177e4 LT |
1126 | } |
1127 | ||
1128 | /* device side completion --> continuable */ | |
1129 | if (req->req.status != -EINPROGRESS) { | |
1130 | list_del_init (&req->queue); | |
1131 | ||
1132 | spin_unlock (&dum->lock); | |
1133 | req->req.complete (&ep->ep, &req->req); | |
1134 | spin_lock (&dum->lock); | |
1135 | ||
1136 | /* requests might have been unlinked... */ | |
1137 | rescan = 1; | |
1138 | } | |
1139 | ||
1140 | /* host side completion --> terminate */ | |
4d2f110c | 1141 | if (*status != -EINPROGRESS) |
1da177e4 LT |
1142 | break; |
1143 | ||
1144 | /* rescan to continue with any other queued i/o */ | |
1145 | if (rescan) | |
1146 | goto top; | |
1147 | } | |
1148 | return limit; | |
1149 | } | |
1150 | ||
1151 | static int periodic_bytes (struct dummy *dum, struct dummy_ep *ep) | |
1152 | { | |
1153 | int limit = ep->ep.maxpacket; | |
1154 | ||
1155 | if (dum->gadget.speed == USB_SPEED_HIGH) { | |
1156 | int tmp; | |
1157 | ||
1158 | /* high bandwidth mode */ | |
1159 | tmp = le16_to_cpu(ep->desc->wMaxPacketSize); | |
1da177e4 LT |
1160 | tmp = (tmp >> 11) & 0x03; |
1161 | tmp *= 8 /* applies to entire frame */; | |
1162 | limit += limit * tmp; | |
1163 | } | |
1164 | return limit; | |
1165 | } | |
1166 | ||
1167 | #define is_active(dum) ((dum->port_status & \ | |
1168 | (USB_PORT_STAT_CONNECTION | USB_PORT_STAT_ENABLE | \ | |
1169 | USB_PORT_STAT_SUSPEND)) \ | |
1170 | == (USB_PORT_STAT_CONNECTION | USB_PORT_STAT_ENABLE)) | |
1171 | ||
1172 | static struct dummy_ep *find_endpoint (struct dummy *dum, u8 address) | |
1173 | { | |
1174 | int i; | |
1175 | ||
1176 | if (!is_active (dum)) | |
1177 | return NULL; | |
1178 | if ((address & ~USB_DIR_IN) == 0) | |
1179 | return &dum->ep [0]; | |
1180 | for (i = 1; i < DUMMY_ENDPOINTS; i++) { | |
1181 | struct dummy_ep *ep = &dum->ep [i]; | |
1182 | ||
1183 | if (!ep->desc) | |
1184 | continue; | |
1185 | if (ep->desc->bEndpointAddress == address) | |
1186 | return ep; | |
1187 | } | |
1188 | return NULL; | |
1189 | } | |
1190 | ||
1191 | #undef is_active | |
1192 | ||
1193 | #define Dev_Request (USB_TYPE_STANDARD | USB_RECIP_DEVICE) | |
1194 | #define Dev_InRequest (Dev_Request | USB_DIR_IN) | |
1195 | #define Intf_Request (USB_TYPE_STANDARD | USB_RECIP_INTERFACE) | |
1196 | #define Intf_InRequest (Intf_Request | USB_DIR_IN) | |
1197 | #define Ep_Request (USB_TYPE_STANDARD | USB_RECIP_ENDPOINT) | |
1198 | #define Ep_InRequest (Ep_Request | USB_DIR_IN) | |
1199 | ||
8be8a9d3 TB |
1200 | |
1201 | /** | |
1202 | * handle_control_request() - handles all control transfers | |
1203 | * @dum: pointer to dummy (the_controller) | |
1204 | * @urb: the urb request to handle | |
1205 | * @setup: pointer to the setup data for a USB device control | |
1206 | * request | |
1207 | * @status: pointer to request handling status | |
1208 | * | |
1209 | * Return 0 - if the request was handled | |
1210 | * 1 - if the request wasn't handles | |
1211 | * error code on error | |
1212 | */ | |
1213 | static int handle_control_request(struct dummy *dum, struct urb *urb, | |
1214 | struct usb_ctrlrequest *setup, | |
1215 | int *status) | |
1216 | { | |
1217 | struct dummy_ep *ep2; | |
1218 | int ret_val = 1; | |
1219 | unsigned w_index; | |
1220 | unsigned w_value; | |
1221 | ||
1222 | w_index = le16_to_cpu(setup->wIndex); | |
1223 | w_value = le16_to_cpu(setup->wValue); | |
1224 | switch (setup->bRequest) { | |
1225 | case USB_REQ_SET_ADDRESS: | |
1226 | if (setup->bRequestType != Dev_Request) | |
1227 | break; | |
1228 | dum->address = w_value; | |
1229 | *status = 0; | |
1230 | dev_dbg(udc_dev(dum), "set_address = %d\n", | |
1231 | w_value); | |
1232 | ret_val = 0; | |
1233 | break; | |
1234 | case USB_REQ_SET_FEATURE: | |
1235 | if (setup->bRequestType == Dev_Request) { | |
1236 | ret_val = 0; | |
1237 | switch (w_value) { | |
1238 | case USB_DEVICE_REMOTE_WAKEUP: | |
1239 | break; | |
1240 | case USB_DEVICE_B_HNP_ENABLE: | |
1241 | dum->gadget.b_hnp_enable = 1; | |
1242 | break; | |
1243 | case USB_DEVICE_A_HNP_SUPPORT: | |
1244 | dum->gadget.a_hnp_support = 1; | |
1245 | break; | |
1246 | case USB_DEVICE_A_ALT_HNP_SUPPORT: | |
1247 | dum->gadget.a_alt_hnp_support = 1; | |
1248 | break; | |
1249 | default: | |
1250 | ret_val = -EOPNOTSUPP; | |
1251 | } | |
1252 | if (ret_val == 0) { | |
1253 | dum->devstatus |= (1 << w_value); | |
1254 | *status = 0; | |
1255 | } | |
1256 | } else if (setup->bRequestType == Ep_Request) { | |
1257 | /* endpoint halt */ | |
1258 | ep2 = find_endpoint(dum, w_index); | |
1259 | if (!ep2 || ep2->ep.name == ep0name) { | |
1260 | ret_val = -EOPNOTSUPP; | |
1261 | break; | |
1262 | } | |
1263 | ep2->halted = 1; | |
1264 | ret_val = 0; | |
1265 | *status = 0; | |
1266 | } | |
1267 | break; | |
1268 | case USB_REQ_CLEAR_FEATURE: | |
1269 | if (setup->bRequestType == Dev_Request) { | |
1270 | ret_val = 0; | |
1271 | switch (w_value) { | |
1272 | case USB_DEVICE_REMOTE_WAKEUP: | |
1273 | w_value = USB_DEVICE_REMOTE_WAKEUP; | |
1274 | break; | |
1275 | default: | |
1276 | ret_val = -EOPNOTSUPP; | |
1277 | break; | |
1278 | } | |
1279 | if (ret_val == 0) { | |
1280 | dum->devstatus &= ~(1 << w_value); | |
1281 | *status = 0; | |
1282 | } | |
1283 | } else if (setup->bRequestType == Ep_Request) { | |
1284 | /* endpoint halt */ | |
1285 | ep2 = find_endpoint(dum, w_index); | |
1286 | if (!ep2) { | |
1287 | ret_val = -EOPNOTSUPP; | |
1288 | break; | |
1289 | } | |
1290 | if (!ep2->wedged) | |
1291 | ep2->halted = 0; | |
1292 | ret_val = 0; | |
1293 | *status = 0; | |
1294 | } | |
1295 | break; | |
1296 | case USB_REQ_GET_STATUS: | |
1297 | if (setup->bRequestType == Dev_InRequest | |
1298 | || setup->bRequestType == Intf_InRequest | |
1299 | || setup->bRequestType == Ep_InRequest) { | |
1300 | char *buf; | |
1301 | /* | |
1302 | * device: remote wakeup, selfpowered | |
1303 | * interface: nothing | |
1304 | * endpoint: halt | |
1305 | */ | |
1306 | buf = (char *)urb->transfer_buffer; | |
1307 | if (urb->transfer_buffer_length > 0) { | |
1308 | if (setup->bRequestType == Ep_InRequest) { | |
1309 | ep2 = find_endpoint(dum, w_index); | |
1310 | if (!ep2) { | |
1311 | ret_val = -EOPNOTSUPP; | |
1312 | break; | |
1313 | } | |
1314 | buf[0] = ep2->halted; | |
1315 | } else if (setup->bRequestType == | |
1316 | Dev_InRequest) { | |
1317 | buf[0] = (u8)dum->devstatus; | |
1318 | } else | |
1319 | buf[0] = 0; | |
1320 | } | |
1321 | if (urb->transfer_buffer_length > 1) | |
1322 | buf[1] = 0; | |
1323 | urb->actual_length = min_t(u32, 2, | |
1324 | urb->transfer_buffer_length); | |
1325 | ret_val = 0; | |
1326 | *status = 0; | |
1327 | } | |
1328 | break; | |
1329 | } | |
1330 | return ret_val; | |
1331 | } | |
1332 | ||
1da177e4 LT |
1333 | /* drive both sides of the transfers; looks like irq handlers to |
1334 | * both drivers except the callbacks aren't in_irq(). | |
1335 | */ | |
1336 | static void dummy_timer (unsigned long _dum) | |
1337 | { | |
1338 | struct dummy *dum = (struct dummy *) _dum; | |
1339 | struct urbp *urbp, *tmp; | |
1340 | unsigned long flags; | |
1341 | int limit, total; | |
1342 | int i; | |
1343 | ||
1344 | /* simplistic model for one frame's bandwidth */ | |
1345 | switch (dum->gadget.speed) { | |
1346 | case USB_SPEED_LOW: | |
1347 | total = 8/*bytes*/ * 12/*packets*/; | |
1348 | break; | |
1349 | case USB_SPEED_FULL: | |
1350 | total = 64/*bytes*/ * 19/*packets*/; | |
1351 | break; | |
1352 | case USB_SPEED_HIGH: | |
1353 | total = 512/*bytes*/ * 13/*packets*/ * 8/*uframes*/; | |
1354 | break; | |
1355 | default: | |
1356 | dev_err (dummy_dev(dum), "bogus device speed\n"); | |
1357 | return; | |
1358 | } | |
1359 | ||
1360 | /* FIXME if HZ != 1000 this will probably misbehave ... */ | |
1361 | ||
1362 | /* look at each urb queued by the host side driver */ | |
1363 | spin_lock_irqsave (&dum->lock, flags); | |
1364 | ||
1365 | if (!dum->udev) { | |
1366 | dev_err (dummy_dev(dum), | |
1367 | "timer fired with no URBs pending?\n"); | |
1368 | spin_unlock_irqrestore (&dum->lock, flags); | |
1369 | return; | |
1370 | } | |
1371 | ||
1372 | for (i = 0; i < DUMMY_ENDPOINTS; i++) { | |
1373 | if (!ep_name [i]) | |
1374 | break; | |
1375 | dum->ep [i].already_seen = 0; | |
1376 | } | |
1377 | ||
1378 | restart: | |
1379 | list_for_each_entry_safe (urbp, tmp, &dum->urbp_list, urbp_list) { | |
1380 | struct urb *urb; | |
1381 | struct dummy_request *req; | |
1382 | u8 address; | |
1383 | struct dummy_ep *ep = NULL; | |
1384 | int type; | |
4d2f110c | 1385 | int status = -EINPROGRESS; |
1da177e4 LT |
1386 | |
1387 | urb = urbp->urb; | |
eb231054 | 1388 | if (urb->unlinked) |
1da177e4 | 1389 | goto return_urb; |
eb231054 | 1390 | else if (dum->rh_state != DUMMY_RH_RUNNING) |
391eca9d | 1391 | continue; |
1da177e4 LT |
1392 | type = usb_pipetype (urb->pipe); |
1393 | ||
1394 | /* used up this frame's non-periodic bandwidth? | |
1395 | * FIXME there's infinite bandwidth for control and | |
1396 | * periodic transfers ... unrealistic. | |
1397 | */ | |
1398 | if (total <= 0 && type == PIPE_BULK) | |
1399 | continue; | |
1400 | ||
1401 | /* find the gadget's ep for this request (if configured) */ | |
1402 | address = usb_pipeendpoint (urb->pipe); | |
1403 | if (usb_pipein (urb->pipe)) | |
1404 | address |= USB_DIR_IN; | |
1405 | ep = find_endpoint(dum, address); | |
1406 | if (!ep) { | |
1407 | /* set_configuration() disagreement */ | |
1408 | dev_dbg (dummy_dev(dum), | |
1409 | "no ep configured for urb %p\n", | |
1410 | urb); | |
4d2f110c | 1411 | status = -EPROTO; |
1da177e4 LT |
1412 | goto return_urb; |
1413 | } | |
1414 | ||
1415 | if (ep->already_seen) | |
1416 | continue; | |
1417 | ep->already_seen = 1; | |
1418 | if (ep == &dum->ep [0] && urb->error_count) { | |
1419 | ep->setup_stage = 1; /* a new urb */ | |
1420 | urb->error_count = 0; | |
1421 | } | |
1422 | if (ep->halted && !ep->setup_stage) { | |
1423 | /* NOTE: must not be iso! */ | |
1424 | dev_dbg (dummy_dev(dum), "ep %s halted, urb %p\n", | |
1425 | ep->ep.name, urb); | |
4d2f110c | 1426 | status = -EPIPE; |
1da177e4 LT |
1427 | goto return_urb; |
1428 | } | |
1429 | /* FIXME make sure both ends agree on maxpacket */ | |
1430 | ||
1431 | /* handle control requests */ | |
1432 | if (ep == &dum->ep [0] && ep->setup_stage) { | |
1433 | struct usb_ctrlrequest setup; | |
1434 | int value = 1; | |
1da177e4 LT |
1435 | |
1436 | setup = *(struct usb_ctrlrequest*) urb->setup_packet; | |
1da177e4 LT |
1437 | /* paranoia, in case of stale queued data */ |
1438 | list_for_each_entry (req, &ep->queue, queue) { | |
1439 | list_del_init (&req->queue); | |
1440 | req->req.status = -EOVERFLOW; | |
d9b76251 | 1441 | dev_dbg (udc_dev(dum), "stale req = %p\n", |
1da177e4 LT |
1442 | req); |
1443 | ||
1444 | spin_unlock (&dum->lock); | |
1445 | req->req.complete (&ep->ep, &req->req); | |
1446 | spin_lock (&dum->lock); | |
1447 | ep->already_seen = 0; | |
1448 | goto restart; | |
1449 | } | |
1450 | ||
1451 | /* gadget driver never sees set_address or operations | |
1452 | * on standard feature flags. some hardware doesn't | |
1453 | * even expose them. | |
1454 | */ | |
1455 | ep->last_io = jiffies; | |
1456 | ep->setup_stage = 0; | |
1457 | ep->halted = 0; | |
1da177e4 | 1458 | |
8be8a9d3 TB |
1459 | value = handle_control_request(dum, urb, &setup, |
1460 | &status); | |
1da177e4 LT |
1461 | |
1462 | /* gadget driver handles all other requests. block | |
1463 | * until setup() returns; no reentrancy issues etc. | |
1464 | */ | |
1465 | if (value > 0) { | |
1466 | spin_unlock (&dum->lock); | |
1467 | value = dum->driver->setup (&dum->gadget, | |
1468 | &setup); | |
1469 | spin_lock (&dum->lock); | |
1470 | ||
1471 | if (value >= 0) { | |
1472 | /* no delays (max 64KB data stage) */ | |
1473 | limit = 64*1024; | |
1474 | goto treat_control_like_bulk; | |
1475 | } | |
1476 | /* error, see below */ | |
1477 | } | |
1478 | ||
1479 | if (value < 0) { | |
1480 | if (value != -EOPNOTSUPP) | |
d9b76251 | 1481 | dev_dbg (udc_dev(dum), |
1da177e4 LT |
1482 | "setup --> %d\n", |
1483 | value); | |
4d2f110c | 1484 | status = -EPIPE; |
1da177e4 LT |
1485 | urb->actual_length = 0; |
1486 | } | |
1487 | ||
1488 | goto return_urb; | |
1489 | } | |
1490 | ||
1491 | /* non-control requests */ | |
1492 | limit = total; | |
1493 | switch (usb_pipetype (urb->pipe)) { | |
1494 | case PIPE_ISOCHRONOUS: | |
1495 | /* FIXME is it urb->interval since the last xfer? | |
1496 | * use urb->iso_frame_desc[i]. | |
1497 | * complete whether or not ep has requests queued. | |
1498 | * report random errors, to debug drivers. | |
1499 | */ | |
1500 | limit = max (limit, periodic_bytes (dum, ep)); | |
4d2f110c | 1501 | status = -ENOSYS; |
1da177e4 LT |
1502 | break; |
1503 | ||
1504 | case PIPE_INTERRUPT: | |
1505 | /* FIXME is it urb->interval since the last xfer? | |
1506 | * this almost certainly polls too fast. | |
1507 | */ | |
1508 | limit = max (limit, periodic_bytes (dum, ep)); | |
1509 | /* FALLTHROUGH */ | |
1510 | ||
1511 | // case PIPE_BULK: case PIPE_CONTROL: | |
1512 | default: | |
1513 | treat_control_like_bulk: | |
1514 | ep->last_io = jiffies; | |
4d2f110c | 1515 | total = transfer(dum, urb, ep, limit, &status); |
1da177e4 LT |
1516 | break; |
1517 | } | |
1518 | ||
1519 | /* incomplete transfer? */ | |
4d2f110c | 1520 | if (status == -EINPROGRESS) |
1da177e4 LT |
1521 | continue; |
1522 | ||
1523 | return_urb: | |
1da177e4 LT |
1524 | list_del (&urbp->urbp_list); |
1525 | kfree (urbp); | |
1526 | if (ep) | |
1527 | ep->already_seen = ep->setup_stage = 0; | |
1528 | ||
e9df41c5 | 1529 | usb_hcd_unlink_urb_from_ep(dummy_to_hcd(dum), urb); |
1da177e4 | 1530 | spin_unlock (&dum->lock); |
4a00027d | 1531 | usb_hcd_giveback_urb(dummy_to_hcd(dum), urb, status); |
1da177e4 LT |
1532 | spin_lock (&dum->lock); |
1533 | ||
1534 | goto restart; | |
1535 | } | |
1536 | ||
391eca9d | 1537 | if (list_empty (&dum->urbp_list)) { |
1da177e4 LT |
1538 | usb_put_dev (dum->udev); |
1539 | dum->udev = NULL; | |
391eca9d AS |
1540 | } else if (dum->rh_state == DUMMY_RH_RUNNING) { |
1541 | /* want a 1 msec delay here */ | |
1542 | mod_timer (&dum->timer, jiffies + msecs_to_jiffies(1)); | |
1da177e4 LT |
1543 | } |
1544 | ||
1545 | spin_unlock_irqrestore (&dum->lock, flags); | |
1546 | } | |
1547 | ||
1548 | /*-------------------------------------------------------------------------*/ | |
1549 | ||
1550 | #define PORT_C_MASK \ | |
c2db8b5e AS |
1551 | ((USB_PORT_STAT_C_CONNECTION \ |
1552 | | USB_PORT_STAT_C_ENABLE \ | |
1553 | | USB_PORT_STAT_C_SUSPEND \ | |
1554 | | USB_PORT_STAT_C_OVERCURRENT \ | |
1555 | | USB_PORT_STAT_C_RESET) << 16) | |
1da177e4 LT |
1556 | |
1557 | static int dummy_hub_status (struct usb_hcd *hcd, char *buf) | |
1558 | { | |
1559 | struct dummy *dum; | |
1560 | unsigned long flags; | |
391eca9d | 1561 | int retval = 0; |
1da177e4 LT |
1562 | |
1563 | dum = hcd_to_dummy (hcd); | |
1564 | ||
1565 | spin_lock_irqsave (&dum->lock, flags); | |
541c7d43 | 1566 | if (!HCD_HW_ACCESSIBLE(hcd)) |
391eca9d | 1567 | goto done; |
f1c39fad AS |
1568 | |
1569 | if (dum->resuming && time_after_eq (jiffies, dum->re_timeout)) { | |
1570 | dum->port_status |= (USB_PORT_STAT_C_SUSPEND << 16); | |
1571 | dum->port_status &= ~USB_PORT_STAT_SUSPEND; | |
1572 | set_link_state (dum); | |
1573 | } | |
1574 | ||
391eca9d | 1575 | if ((dum->port_status & PORT_C_MASK) != 0) { |
1da177e4 LT |
1576 | *buf = (1 << 1); |
1577 | dev_dbg (dummy_dev(dum), "port status 0x%08x has changes\n", | |
391eca9d | 1578 | dum->port_status); |
1da177e4 | 1579 | retval = 1; |
391eca9d AS |
1580 | if (dum->rh_state == DUMMY_RH_SUSPENDED) |
1581 | usb_hcd_resume_root_hub (hcd); | |
1da177e4 | 1582 | } |
391eca9d | 1583 | done: |
1da177e4 LT |
1584 | spin_unlock_irqrestore (&dum->lock, flags); |
1585 | return retval; | |
1586 | } | |
1587 | ||
1588 | static inline void | |
1589 | hub_descriptor (struct usb_hub_descriptor *desc) | |
1590 | { | |
1591 | memset (desc, 0, sizeof *desc); | |
1592 | desc->bDescriptorType = 0x29; | |
1593 | desc->bDescLength = 9; | |
fd05e720 | 1594 | desc->wHubCharacteristics = cpu_to_le16(0x0001); |
1da177e4 | 1595 | desc->bNbrPorts = 1; |
dbe79bbe JY |
1596 | desc->u.hs.DeviceRemovable[0] = 0xff; |
1597 | desc->u.hs.DeviceRemovable[1] = 0xff; | |
1da177e4 LT |
1598 | } |
1599 | ||
1600 | static int dummy_hub_control ( | |
1601 | struct usb_hcd *hcd, | |
1602 | u16 typeReq, | |
1603 | u16 wValue, | |
1604 | u16 wIndex, | |
1605 | char *buf, | |
1606 | u16 wLength | |
1607 | ) { | |
1608 | struct dummy *dum; | |
1609 | int retval = 0; | |
1610 | unsigned long flags; | |
1611 | ||
541c7d43 | 1612 | if (!HCD_HW_ACCESSIBLE(hcd)) |
391eca9d AS |
1613 | return -ETIMEDOUT; |
1614 | ||
1da177e4 LT |
1615 | dum = hcd_to_dummy (hcd); |
1616 | spin_lock_irqsave (&dum->lock, flags); | |
1617 | switch (typeReq) { | |
1618 | case ClearHubFeature: | |
1619 | break; | |
1620 | case ClearPortFeature: | |
1621 | switch (wValue) { | |
1622 | case USB_PORT_FEAT_SUSPEND: | |
c2db8b5e | 1623 | if (dum->port_status & USB_PORT_STAT_SUSPEND) { |
1da177e4 LT |
1624 | /* 20msec resume signaling */ |
1625 | dum->resuming = 1; | |
1626 | dum->re_timeout = jiffies + | |
f1c39fad | 1627 | msecs_to_jiffies(20); |
1da177e4 LT |
1628 | } |
1629 | break; | |
1630 | case USB_PORT_FEAT_POWER: | |
f1c39fad AS |
1631 | if (dum->port_status & USB_PORT_STAT_POWER) |
1632 | dev_dbg (dummy_dev(dum), "power-off\n"); | |
1633 | /* FALLS THROUGH */ | |
1da177e4 LT |
1634 | default: |
1635 | dum->port_status &= ~(1 << wValue); | |
f1c39fad | 1636 | set_link_state (dum); |
1da177e4 LT |
1637 | } |
1638 | break; | |
1639 | case GetHubDescriptor: | |
1640 | hub_descriptor ((struct usb_hub_descriptor *) buf); | |
1641 | break; | |
1642 | case GetHubStatus: | |
551509d2 | 1643 | *(__le32 *) buf = cpu_to_le32 (0); |
1da177e4 LT |
1644 | break; |
1645 | case GetPortStatus: | |
1646 | if (wIndex != 1) | |
1647 | retval = -EPIPE; | |
1648 | ||
1649 | /* whoever resets or resumes must GetPortStatus to | |
1650 | * complete it!! | |
1651 | */ | |
f1c39fad AS |
1652 | if (dum->resuming && |
1653 | time_after_eq (jiffies, dum->re_timeout)) { | |
c2db8b5e AS |
1654 | dum->port_status |= (USB_PORT_STAT_C_SUSPEND << 16); |
1655 | dum->port_status &= ~USB_PORT_STAT_SUSPEND; | |
1da177e4 | 1656 | } |
f1c39fad AS |
1657 | if ((dum->port_status & USB_PORT_STAT_RESET) != 0 && |
1658 | time_after_eq (jiffies, dum->re_timeout)) { | |
c2db8b5e AS |
1659 | dum->port_status |= (USB_PORT_STAT_C_RESET << 16); |
1660 | dum->port_status &= ~USB_PORT_STAT_RESET; | |
f1c39fad | 1661 | if (dum->pullup) { |
1da177e4 LT |
1662 | dum->port_status |= USB_PORT_STAT_ENABLE; |
1663 | /* give it the best speed we agree on */ | |
1664 | dum->gadget.speed = dum->driver->speed; | |
1665 | dum->gadget.ep0->maxpacket = 64; | |
1666 | switch (dum->gadget.speed) { | |
1667 | case USB_SPEED_HIGH: | |
1668 | dum->port_status |= | |
1669 | USB_PORT_STAT_HIGH_SPEED; | |
1670 | break; | |
1671 | case USB_SPEED_LOW: | |
1672 | dum->gadget.ep0->maxpacket = 8; | |
1673 | dum->port_status |= | |
1674 | USB_PORT_STAT_LOW_SPEED; | |
1675 | break; | |
1676 | default: | |
1677 | dum->gadget.speed = USB_SPEED_FULL; | |
1678 | break; | |
1679 | } | |
1680 | } | |
1681 | } | |
f1c39fad | 1682 | set_link_state (dum); |
cc095b0b AS |
1683 | ((__le16 *) buf)[0] = cpu_to_le16 (dum->port_status); |
1684 | ((__le16 *) buf)[1] = cpu_to_le16 (dum->port_status >> 16); | |
1da177e4 LT |
1685 | break; |
1686 | case SetHubFeature: | |
1687 | retval = -EPIPE; | |
1688 | break; | |
1689 | case SetPortFeature: | |
1690 | switch (wValue) { | |
1691 | case USB_PORT_FEAT_SUSPEND: | |
f1c39fad | 1692 | if (dum->active) { |
c2db8b5e | 1693 | dum->port_status |= USB_PORT_STAT_SUSPEND; |
f1c39fad AS |
1694 | |
1695 | /* HNP would happen here; for now we | |
1696 | * assume b_bus_req is always true. | |
1697 | */ | |
1698 | set_link_state (dum); | |
1699 | if (((1 << USB_DEVICE_B_HNP_ENABLE) | |
1700 | & dum->devstatus) != 0) | |
1701 | dev_dbg (dummy_dev(dum), | |
5742b0c9 | 1702 | "no HNP yet!\n"); |
1da177e4 LT |
1703 | } |
1704 | break; | |
f1c39fad AS |
1705 | case USB_PORT_FEAT_POWER: |
1706 | dum->port_status |= USB_PORT_STAT_POWER; | |
1707 | set_link_state (dum); | |
1708 | break; | |
1da177e4 | 1709 | case USB_PORT_FEAT_RESET: |
f1c39fad AS |
1710 | /* if it's already enabled, disable */ |
1711 | dum->port_status &= ~(USB_PORT_STAT_ENABLE | |
1712 | | USB_PORT_STAT_LOW_SPEED | |
1713 | | USB_PORT_STAT_HIGH_SPEED); | |
391eca9d | 1714 | dum->devstatus = 0; |
1da177e4 LT |
1715 | /* 50msec reset signaling */ |
1716 | dum->re_timeout = jiffies + msecs_to_jiffies(50); | |
f1c39fad | 1717 | /* FALLS THROUGH */ |
1da177e4 | 1718 | default: |
f1c39fad AS |
1719 | if ((dum->port_status & USB_PORT_STAT_POWER) != 0) { |
1720 | dum->port_status |= (1 << wValue); | |
1721 | set_link_state (dum); | |
1722 | } | |
1da177e4 LT |
1723 | } |
1724 | break; | |
1725 | ||
1726 | default: | |
1727 | dev_dbg (dummy_dev(dum), | |
1728 | "hub control req%04x v%04x i%04x l%d\n", | |
1729 | typeReq, wValue, wIndex, wLength); | |
1730 | ||
1731 | /* "protocol stall" on error */ | |
1732 | retval = -EPIPE; | |
1733 | } | |
1734 | spin_unlock_irqrestore (&dum->lock, flags); | |
685eb93f AS |
1735 | |
1736 | if ((dum->port_status & PORT_C_MASK) != 0) | |
1737 | usb_hcd_poll_rh_status (hcd); | |
1da177e4 LT |
1738 | return retval; |
1739 | } | |
1740 | ||
0c0382e3 | 1741 | static int dummy_bus_suspend (struct usb_hcd *hcd) |
391eca9d AS |
1742 | { |
1743 | struct dummy *dum = hcd_to_dummy (hcd); | |
1744 | ||
441b62c1 | 1745 | dev_dbg (&hcd->self.root_hub->dev, "%s\n", __func__); |
3cf0a22e | 1746 | |
391eca9d AS |
1747 | spin_lock_irq (&dum->lock); |
1748 | dum->rh_state = DUMMY_RH_SUSPENDED; | |
1749 | set_link_state (dum); | |
3cf0a22e | 1750 | hcd->state = HC_STATE_SUSPENDED; |
391eca9d AS |
1751 | spin_unlock_irq (&dum->lock); |
1752 | return 0; | |
1753 | } | |
1754 | ||
0c0382e3 | 1755 | static int dummy_bus_resume (struct usb_hcd *hcd) |
391eca9d AS |
1756 | { |
1757 | struct dummy *dum = hcd_to_dummy (hcd); | |
3cf0a22e AS |
1758 | int rc = 0; |
1759 | ||
441b62c1 | 1760 | dev_dbg (&hcd->self.root_hub->dev, "%s\n", __func__); |
391eca9d AS |
1761 | |
1762 | spin_lock_irq (&dum->lock); | |
541c7d43 | 1763 | if (!HCD_HW_ACCESSIBLE(hcd)) { |
cfa59dab | 1764 | rc = -ESHUTDOWN; |
3cf0a22e AS |
1765 | } else { |
1766 | dum->rh_state = DUMMY_RH_RUNNING; | |
1767 | set_link_state (dum); | |
1768 | if (!list_empty(&dum->urbp_list)) | |
1769 | mod_timer (&dum->timer, jiffies); | |
1770 | hcd->state = HC_STATE_RUNNING; | |
1771 | } | |
391eca9d | 1772 | spin_unlock_irq (&dum->lock); |
3cf0a22e | 1773 | return rc; |
391eca9d | 1774 | } |
1da177e4 LT |
1775 | |
1776 | /*-------------------------------------------------------------------------*/ | |
1777 | ||
1778 | static inline ssize_t | |
1779 | show_urb (char *buf, size_t size, struct urb *urb) | |
1780 | { | |
1781 | int ep = usb_pipeendpoint (urb->pipe); | |
1782 | ||
1783 | return snprintf (buf, size, | |
1784 | "urb/%p %s ep%d%s%s len %d/%d\n", | |
1785 | urb, | |
1786 | ({ char *s; | |
1787 | switch (urb->dev->speed) { | |
1788 | case USB_SPEED_LOW: s = "ls"; break; | |
1789 | case USB_SPEED_FULL: s = "fs"; break; | |
1790 | case USB_SPEED_HIGH: s = "hs"; break; | |
1791 | default: s = "?"; break; | |
1792 | }; s; }), | |
1793 | ep, ep ? (usb_pipein (urb->pipe) ? "in" : "out") : "", | |
1794 | ({ char *s; \ | |
1795 | switch (usb_pipetype (urb->pipe)) { \ | |
1796 | case PIPE_CONTROL: s = ""; break; \ | |
1797 | case PIPE_BULK: s = "-bulk"; break; \ | |
1798 | case PIPE_INTERRUPT: s = "-int"; break; \ | |
1799 | default: s = "-iso"; break; \ | |
1800 | }; s;}), | |
1801 | urb->actual_length, urb->transfer_buffer_length); | |
1802 | } | |
1803 | ||
1804 | static ssize_t | |
10523b3b | 1805 | show_urbs (struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
1806 | { |
1807 | struct usb_hcd *hcd = dev_get_drvdata (dev); | |
1808 | struct dummy *dum = hcd_to_dummy (hcd); | |
1809 | struct urbp *urbp; | |
1810 | size_t size = 0; | |
1811 | unsigned long flags; | |
1812 | ||
1813 | spin_lock_irqsave (&dum->lock, flags); | |
1814 | list_for_each_entry (urbp, &dum->urbp_list, urbp_list) { | |
1815 | size_t temp; | |
1816 | ||
1817 | temp = show_urb (buf, PAGE_SIZE - size, urbp->urb); | |
1818 | buf += temp; | |
1819 | size += temp; | |
1820 | } | |
1821 | spin_unlock_irqrestore (&dum->lock, flags); | |
1822 | ||
1823 | return size; | |
1824 | } | |
1825 | static DEVICE_ATTR (urbs, S_IRUGO, show_urbs, NULL); | |
1826 | ||
1827 | static int dummy_start (struct usb_hcd *hcd) | |
1828 | { | |
1829 | struct dummy *dum; | |
1da177e4 LT |
1830 | |
1831 | dum = hcd_to_dummy (hcd); | |
1832 | ||
1833 | /* | |
1834 | * MASTER side init ... we emulate a root hub that'll only ever | |
1835 | * talk to one device (the slave side). Also appears in sysfs, | |
1836 | * just like more familiar pci-based HCDs. | |
1837 | */ | |
1838 | spin_lock_init (&dum->lock); | |
1839 | init_timer (&dum->timer); | |
1840 | dum->timer.function = dummy_timer; | |
1841 | dum->timer.data = (unsigned long) dum; | |
391eca9d | 1842 | dum->rh_state = DUMMY_RH_RUNNING; |
1da177e4 LT |
1843 | |
1844 | INIT_LIST_HEAD (&dum->urbp_list); | |
1845 | ||
caf29f62 | 1846 | hcd->power_budget = POWER_BUDGET; |
1da177e4 | 1847 | hcd->state = HC_STATE_RUNNING; |
685eb93f | 1848 | hcd->uses_new_polling = 1; |
1da177e4 | 1849 | |
5742b0c9 AS |
1850 | #ifdef CONFIG_USB_OTG |
1851 | hcd->self.otg_port = 1; | |
1852 | #endif | |
1853 | ||
1da177e4 | 1854 | /* FIXME 'urbs' should be a per-device thing, maybe in usbcore */ |
efd54a36 | 1855 | return device_create_file (dummy_dev(dum), &dev_attr_urbs); |
1da177e4 LT |
1856 | } |
1857 | ||
1858 | static void dummy_stop (struct usb_hcd *hcd) | |
1859 | { | |
1860 | struct dummy *dum; | |
1861 | ||
1862 | dum = hcd_to_dummy (hcd); | |
1863 | ||
1864 | device_remove_file (dummy_dev(dum), &dev_attr_urbs); | |
1da177e4 | 1865 | usb_gadget_unregister_driver (dum->driver); |
1da177e4 LT |
1866 | dev_info (dummy_dev(dum), "stopped\n"); |
1867 | } | |
1868 | ||
1869 | /*-------------------------------------------------------------------------*/ | |
1870 | ||
1871 | static int dummy_h_get_frame (struct usb_hcd *hcd) | |
1872 | { | |
1873 | return dummy_g_get_frame (NULL); | |
1874 | } | |
1875 | ||
1876 | static const struct hc_driver dummy_hcd = { | |
1877 | .description = (char *) driver_name, | |
1878 | .product_desc = "Dummy host controller", | |
1879 | .hcd_priv_size = sizeof(struct dummy), | |
1880 | ||
1881 | .flags = HCD_USB2, | |
1882 | ||
1883 | .start = dummy_start, | |
1884 | .stop = dummy_stop, | |
1885 | ||
1886 | .urb_enqueue = dummy_urb_enqueue, | |
1887 | .urb_dequeue = dummy_urb_dequeue, | |
1888 | ||
1889 | .get_frame_number = dummy_h_get_frame, | |
1890 | ||
1891 | .hub_status_data = dummy_hub_status, | |
1892 | .hub_control = dummy_hub_control, | |
0c0382e3 AS |
1893 | .bus_suspend = dummy_bus_suspend, |
1894 | .bus_resume = dummy_bus_resume, | |
1da177e4 LT |
1895 | }; |
1896 | ||
8364d6b0 | 1897 | static int dummy_hcd_probe(struct platform_device *pdev) |
1da177e4 LT |
1898 | { |
1899 | struct usb_hcd *hcd; | |
1900 | int retval; | |
1901 | ||
8364d6b0 | 1902 | dev_info(&pdev->dev, "%s, driver " DRIVER_VERSION "\n", driver_desc); |
1da177e4 | 1903 | |
7071a3ce | 1904 | hcd = usb_create_hcd(&dummy_hcd, &pdev->dev, dev_name(&pdev->dev)); |
1da177e4 LT |
1905 | if (!hcd) |
1906 | return -ENOMEM; | |
1907 | the_controller = hcd_to_dummy (hcd); | |
1908 | ||
1909 | retval = usb_add_hcd(hcd, 0, 0); | |
1910 | if (retval != 0) { | |
1911 | usb_put_hcd (hcd); | |
1912 | the_controller = NULL; | |
1913 | } | |
1914 | return retval; | |
1915 | } | |
1916 | ||
8364d6b0 | 1917 | static int dummy_hcd_remove (struct platform_device *pdev) |
1da177e4 LT |
1918 | { |
1919 | struct usb_hcd *hcd; | |
1920 | ||
8364d6b0 | 1921 | hcd = platform_get_drvdata (pdev); |
1da177e4 LT |
1922 | usb_remove_hcd (hcd); |
1923 | usb_put_hcd (hcd); | |
1924 | the_controller = NULL; | |
d9b76251 | 1925 | return 0; |
1da177e4 LT |
1926 | } |
1927 | ||
8364d6b0 | 1928 | static int dummy_hcd_suspend (struct platform_device *pdev, pm_message_t state) |
391eca9d AS |
1929 | { |
1930 | struct usb_hcd *hcd; | |
3cf0a22e AS |
1931 | struct dummy *dum; |
1932 | int rc = 0; | |
391eca9d | 1933 | |
441b62c1 | 1934 | dev_dbg (&pdev->dev, "%s\n", __func__); |
391eca9d | 1935 | |
3cf0a22e AS |
1936 | hcd = platform_get_drvdata (pdev); |
1937 | dum = hcd_to_dummy (hcd); | |
1938 | if (dum->rh_state == DUMMY_RH_RUNNING) { | |
1939 | dev_warn(&pdev->dev, "Root hub isn't suspended!\n"); | |
1940 | rc = -EBUSY; | |
1941 | } else | |
1942 | clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags); | |
1943 | return rc; | |
391eca9d AS |
1944 | } |
1945 | ||
8364d6b0 | 1946 | static int dummy_hcd_resume (struct platform_device *pdev) |
391eca9d AS |
1947 | { |
1948 | struct usb_hcd *hcd; | |
1949 | ||
441b62c1 | 1950 | dev_dbg (&pdev->dev, "%s\n", __func__); |
391eca9d | 1951 | |
3cf0a22e AS |
1952 | hcd = platform_get_drvdata (pdev); |
1953 | set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags); | |
391eca9d AS |
1954 | usb_hcd_poll_rh_status (hcd); |
1955 | return 0; | |
1956 | } | |
1957 | ||
3ae5eaec | 1958 | static struct platform_driver dummy_hcd_driver = { |
d9b76251 AS |
1959 | .probe = dummy_hcd_probe, |
1960 | .remove = dummy_hcd_remove, | |
391eca9d AS |
1961 | .suspend = dummy_hcd_suspend, |
1962 | .resume = dummy_hcd_resume, | |
3ae5eaec RK |
1963 | .driver = { |
1964 | .name = (char *) driver_name, | |
1965 | .owner = THIS_MODULE, | |
1966 | }, | |
d9b76251 | 1967 | }; |
1da177e4 | 1968 | |
d9b76251 | 1969 | /*-------------------------------------------------------------------------*/ |
1da177e4 | 1970 | |
a89a2cd3 AS |
1971 | static struct platform_device *the_udc_pdev; |
1972 | static struct platform_device *the_hcd_pdev; | |
1da177e4 LT |
1973 | |
1974 | static int __init init (void) | |
1975 | { | |
a89a2cd3 | 1976 | int retval = -ENOMEM; |
1da177e4 LT |
1977 | |
1978 | if (usb_disabled ()) | |
1979 | return -ENODEV; | |
d9b76251 | 1980 | |
a89a2cd3 AS |
1981 | the_hcd_pdev = platform_device_alloc(driver_name, -1); |
1982 | if (!the_hcd_pdev) | |
1da177e4 | 1983 | return retval; |
a89a2cd3 AS |
1984 | the_udc_pdev = platform_device_alloc(gadget_name, -1); |
1985 | if (!the_udc_pdev) | |
1986 | goto err_alloc_udc; | |
d9b76251 | 1987 | |
a89a2cd3 AS |
1988 | retval = platform_driver_register(&dummy_hcd_driver); |
1989 | if (retval < 0) | |
1990 | goto err_register_hcd_driver; | |
1991 | retval = platform_driver_register(&dummy_udc_driver); | |
d9b76251 AS |
1992 | if (retval < 0) |
1993 | goto err_register_udc_driver; | |
1994 | ||
a89a2cd3 | 1995 | retval = platform_device_add(the_hcd_pdev); |
d9b76251 | 1996 | if (retval < 0) |
a89a2cd3 AS |
1997 | goto err_add_hcd; |
1998 | retval = platform_device_add(the_udc_pdev); | |
d9b76251 | 1999 | if (retval < 0) |
a89a2cd3 | 2000 | goto err_add_udc; |
d9b76251 AS |
2001 | return retval; |
2002 | ||
a89a2cd3 AS |
2003 | err_add_udc: |
2004 | platform_device_del(the_hcd_pdev); | |
2005 | err_add_hcd: | |
2006 | platform_driver_unregister(&dummy_udc_driver); | |
d9b76251 | 2007 | err_register_udc_driver: |
a89a2cd3 AS |
2008 | platform_driver_unregister(&dummy_hcd_driver); |
2009 | err_register_hcd_driver: | |
2010 | platform_device_put(the_udc_pdev); | |
2011 | err_alloc_udc: | |
2012 | platform_device_put(the_hcd_pdev); | |
1da177e4 LT |
2013 | return retval; |
2014 | } | |
2015 | module_init (init); | |
2016 | ||
2017 | static void __exit cleanup (void) | |
2018 | { | |
a89a2cd3 AS |
2019 | platform_device_unregister(the_udc_pdev); |
2020 | platform_device_unregister(the_hcd_pdev); | |
2021 | platform_driver_unregister(&dummy_udc_driver); | |
2022 | platform_driver_unregister(&dummy_hcd_driver); | |
1da177e4 LT |
2023 | } |
2024 | module_exit (cleanup); |