Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * dummy_hcd.c -- Dummy/Loopback USB host and device emulator driver. | |
3 | * | |
4 | * Maintainer: Alan Stern <stern@rowland.harvard.edu> | |
5 | * | |
6 | * Copyright (C) 2003 David Brownell | |
7 | * Copyright (C) 2003-2005 Alan Stern | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU General Public License as published by | |
11 | * the Free Software Foundation; either version 2 of the License, or | |
12 | * (at your option) any later version. | |
13 | * | |
14 | * This program is distributed in the hope that it will be useful, | |
15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | * GNU General Public License for more details. | |
18 | * | |
19 | * You should have received a copy of the GNU General Public License | |
20 | * along with this program; if not, write to the Free Software | |
21 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
22 | */ | |
23 | ||
24 | ||
25 | /* | |
26 | * This exposes a device side "USB gadget" API, driven by requests to a | |
27 | * Linux-USB host controller driver. USB traffic is simulated; there's | |
28 | * no need for USB hardware. Use this with two other drivers: | |
29 | * | |
30 | * - Gadget driver, responding to requests (slave); | |
31 | * - Host-side device driver, as already familiar in Linux. | |
32 | * | |
33 | * Having this all in one kernel can help some stages of development, | |
34 | * bypassing some hardware (and driver) issues. UML could help too. | |
35 | */ | |
36 | ||
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; | |
851a526d | 85 | unsigned wedged : 1; |
1da177e4 LT |
86 | unsigned already_seen : 1; |
87 | unsigned setup_stage : 1; | |
88 | }; | |
89 | ||
90 | struct dummy_request { | |
91 | struct list_head queue; /* ep's requests */ | |
92 | struct usb_request req; | |
93 | }; | |
94 | ||
95 | static inline struct dummy_ep *usb_ep_to_dummy_ep (struct usb_ep *_ep) | |
96 | { | |
97 | return container_of (_ep, struct dummy_ep, ep); | |
98 | } | |
99 | ||
100 | static inline struct dummy_request *usb_request_to_dummy_request | |
101 | (struct usb_request *_req) | |
102 | { | |
103 | return container_of (_req, struct dummy_request, req); | |
104 | } | |
105 | ||
106 | /*-------------------------------------------------------------------------*/ | |
107 | ||
108 | /* | |
109 | * Every device has ep0 for control requests, plus up to 30 more endpoints, | |
110 | * in one of two types: | |
111 | * | |
112 | * - Configurable: direction (in/out), type (bulk, iso, etc), and endpoint | |
113 | * number can be changed. Names like "ep-a" are used for this type. | |
114 | * | |
115 | * - Fixed Function: in other cases. some characteristics may be mutable; | |
116 | * that'd be hardware-specific. Names like "ep12out-bulk" are used. | |
117 | * | |
118 | * Gadget drivers are responsible for not setting up conflicting endpoint | |
119 | * configurations, illegal or unsupported packet lengths, and so on. | |
120 | */ | |
121 | ||
122 | static const char ep0name [] = "ep0"; | |
123 | ||
124 | static const char *const ep_name [] = { | |
125 | ep0name, /* everyone has ep0 */ | |
126 | ||
127 | /* act like a net2280: high speed, six configurable endpoints */ | |
128 | "ep-a", "ep-b", "ep-c", "ep-d", "ep-e", "ep-f", | |
129 | ||
130 | /* or like pxa250: fifteen fixed function endpoints */ | |
131 | "ep1in-bulk", "ep2out-bulk", "ep3in-iso", "ep4out-iso", "ep5in-int", | |
132 | "ep6in-bulk", "ep7out-bulk", "ep8in-iso", "ep9out-iso", "ep10in-int", | |
133 | "ep11in-bulk", "ep12out-bulk", "ep13in-iso", "ep14out-iso", | |
134 | "ep15in-int", | |
135 | ||
136 | /* or like sa1100: two fixed function endpoints */ | |
137 | "ep1out-bulk", "ep2in-bulk", | |
138 | }; | |
52950ed4 | 139 | #define DUMMY_ENDPOINTS ARRAY_SIZE(ep_name) |
1da177e4 | 140 | |
d9b76251 AS |
141 | /*-------------------------------------------------------------------------*/ |
142 | ||
1da177e4 LT |
143 | #define FIFO_SIZE 64 |
144 | ||
145 | struct urbp { | |
146 | struct urb *urb; | |
147 | struct list_head urbp_list; | |
148 | }; | |
149 | ||
391eca9d AS |
150 | |
151 | enum dummy_rh_state { | |
152 | DUMMY_RH_RESET, | |
153 | DUMMY_RH_SUSPENDED, | |
154 | DUMMY_RH_RUNNING | |
155 | }; | |
156 | ||
1da177e4 LT |
157 | struct dummy { |
158 | spinlock_t lock; | |
159 | ||
160 | /* | |
161 | * SLAVE/GADGET side support | |
162 | */ | |
163 | struct dummy_ep ep [DUMMY_ENDPOINTS]; | |
164 | int address; | |
165 | struct usb_gadget gadget; | |
166 | struct usb_gadget_driver *driver; | |
167 | struct dummy_request fifo_req; | |
168 | u8 fifo_buf [FIFO_SIZE]; | |
169 | u16 devstatus; | |
391eca9d | 170 | unsigned udc_suspended:1; |
f1c39fad AS |
171 | unsigned pullup:1; |
172 | unsigned active:1; | |
173 | unsigned old_active:1; | |
1da177e4 LT |
174 | |
175 | /* | |
176 | * MASTER/HOST side support | |
177 | */ | |
391eca9d | 178 | enum dummy_rh_state rh_state; |
1da177e4 LT |
179 | struct timer_list timer; |
180 | u32 port_status; | |
f1c39fad | 181 | u32 old_status; |
1da177e4 LT |
182 | unsigned resuming:1; |
183 | unsigned long re_timeout; | |
184 | ||
185 | struct usb_device *udev; | |
186 | struct list_head urbp_list; | |
187 | }; | |
188 | ||
189 | static inline struct dummy *hcd_to_dummy (struct usb_hcd *hcd) | |
190 | { | |
191 | return (struct dummy *) (hcd->hcd_priv); | |
192 | } | |
193 | ||
194 | static inline struct usb_hcd *dummy_to_hcd (struct dummy *dum) | |
195 | { | |
196 | return container_of((void *) dum, struct usb_hcd, hcd_priv); | |
197 | } | |
198 | ||
199 | static inline struct device *dummy_dev (struct dummy *dum) | |
200 | { | |
201 | return dummy_to_hcd(dum)->self.controller; | |
202 | } | |
203 | ||
d9b76251 AS |
204 | static inline struct device *udc_dev (struct dummy *dum) |
205 | { | |
206 | return dum->gadget.dev.parent; | |
207 | } | |
208 | ||
1da177e4 LT |
209 | static inline struct dummy *ep_to_dummy (struct dummy_ep *ep) |
210 | { | |
211 | return container_of (ep->gadget, struct dummy, gadget); | |
212 | } | |
213 | ||
214 | static inline struct dummy *gadget_to_dummy (struct usb_gadget *gadget) | |
215 | { | |
216 | return container_of (gadget, struct dummy, gadget); | |
217 | } | |
218 | ||
219 | static inline struct dummy *gadget_dev_to_dummy (struct device *dev) | |
220 | { | |
221 | return container_of (dev, struct dummy, gadget.dev); | |
222 | } | |
223 | ||
224 | static struct dummy *the_controller; | |
225 | ||
226 | /*-------------------------------------------------------------------------*/ | |
227 | ||
f1c39fad AS |
228 | /* SLAVE/GADGET SIDE UTILITY ROUTINES */ |
229 | ||
230 | /* called with spinlock held */ | |
231 | static void nuke (struct dummy *dum, struct dummy_ep *ep) | |
232 | { | |
233 | while (!list_empty (&ep->queue)) { | |
234 | struct dummy_request *req; | |
235 | ||
236 | req = list_entry (ep->queue.next, struct dummy_request, queue); | |
237 | list_del_init (&req->queue); | |
238 | req->req.status = -ESHUTDOWN; | |
239 | ||
240 | spin_unlock (&dum->lock); | |
241 | req->req.complete (&ep->ep, &req->req); | |
242 | spin_lock (&dum->lock); | |
243 | } | |
244 | } | |
245 | ||
246 | /* caller must hold lock */ | |
247 | static void | |
248 | stop_activity (struct dummy *dum) | |
249 | { | |
250 | struct dummy_ep *ep; | |
251 | ||
252 | /* prevent any more requests */ | |
253 | dum->address = 0; | |
254 | ||
255 | /* The timer is left running so that outstanding URBs can fail */ | |
256 | ||
257 | /* nuke any pending requests first, so driver i/o is quiesced */ | |
258 | list_for_each_entry (ep, &dum->gadget.ep_list, ep.ep_list) | |
259 | nuke (dum, ep); | |
260 | ||
261 | /* driver now does any non-usb quiescing necessary */ | |
262 | } | |
263 | ||
264 | /* caller must hold lock */ | |
265 | static void | |
266 | set_link_state (struct dummy *dum) | |
267 | { | |
268 | dum->active = 0; | |
269 | if ((dum->port_status & USB_PORT_STAT_POWER) == 0) | |
270 | dum->port_status = 0; | |
391eca9d AS |
271 | |
272 | /* UDC suspend must cause a disconnect */ | |
273 | else if (!dum->pullup || dum->udc_suspended) { | |
f1c39fad AS |
274 | dum->port_status &= ~(USB_PORT_STAT_CONNECTION | |
275 | USB_PORT_STAT_ENABLE | | |
276 | USB_PORT_STAT_LOW_SPEED | | |
277 | USB_PORT_STAT_HIGH_SPEED | | |
278 | USB_PORT_STAT_SUSPEND); | |
279 | if ((dum->old_status & USB_PORT_STAT_CONNECTION) != 0) | |
280 | dum->port_status |= (USB_PORT_STAT_C_CONNECTION << 16); | |
281 | } else { | |
282 | dum->port_status |= USB_PORT_STAT_CONNECTION; | |
283 | if ((dum->old_status & USB_PORT_STAT_CONNECTION) == 0) | |
284 | dum->port_status |= (USB_PORT_STAT_C_CONNECTION << 16); | |
285 | if ((dum->port_status & USB_PORT_STAT_ENABLE) == 0) | |
286 | dum->port_status &= ~USB_PORT_STAT_SUSPEND; | |
391eca9d AS |
287 | else if ((dum->port_status & USB_PORT_STAT_SUSPEND) == 0 && |
288 | dum->rh_state != DUMMY_RH_SUSPENDED) | |
f1c39fad AS |
289 | dum->active = 1; |
290 | } | |
291 | ||
292 | if ((dum->port_status & USB_PORT_STAT_ENABLE) == 0 || dum->active) | |
293 | dum->resuming = 0; | |
294 | ||
295 | if ((dum->port_status & USB_PORT_STAT_CONNECTION) == 0 || | |
296 | (dum->port_status & USB_PORT_STAT_RESET) != 0) { | |
297 | if ((dum->old_status & USB_PORT_STAT_CONNECTION) != 0 && | |
298 | (dum->old_status & USB_PORT_STAT_RESET) == 0 && | |
299 | dum->driver) { | |
300 | stop_activity (dum); | |
301 | spin_unlock (&dum->lock); | |
302 | dum->driver->disconnect (&dum->gadget); | |
303 | spin_lock (&dum->lock); | |
304 | } | |
305 | } else if (dum->active != dum->old_active) { | |
306 | if (dum->old_active && dum->driver->suspend) { | |
307 | spin_unlock (&dum->lock); | |
308 | dum->driver->suspend (&dum->gadget); | |
309 | spin_lock (&dum->lock); | |
310 | } else if (!dum->old_active && dum->driver->resume) { | |
311 | spin_unlock (&dum->lock); | |
312 | dum->driver->resume (&dum->gadget); | |
313 | spin_lock (&dum->lock); | |
314 | } | |
315 | } | |
316 | ||
317 | dum->old_status = dum->port_status; | |
318 | dum->old_active = dum->active; | |
319 | } | |
320 | ||
321 | /*-------------------------------------------------------------------------*/ | |
322 | ||
1da177e4 LT |
323 | /* SLAVE/GADGET SIDE DRIVER |
324 | * | |
325 | * This only tracks gadget state. All the work is done when the host | |
326 | * side tries some (emulated) i/o operation. Real device controller | |
327 | * drivers would do real i/o using dma, fifos, irqs, timers, etc. | |
328 | */ | |
329 | ||
330 | #define is_enabled(dum) \ | |
331 | (dum->port_status & USB_PORT_STAT_ENABLE) | |
332 | ||
333 | static int | |
334 | dummy_enable (struct usb_ep *_ep, const struct usb_endpoint_descriptor *desc) | |
335 | { | |
336 | struct dummy *dum; | |
337 | struct dummy_ep *ep; | |
338 | unsigned max; | |
339 | int retval; | |
340 | ||
341 | ep = usb_ep_to_dummy_ep (_ep); | |
342 | if (!_ep || !desc || ep->desc || _ep->name == ep0name | |
343 | || desc->bDescriptorType != USB_DT_ENDPOINT) | |
344 | return -EINVAL; | |
345 | dum = ep_to_dummy (ep); | |
346 | if (!dum->driver || !is_enabled (dum)) | |
347 | return -ESHUTDOWN; | |
348 | max = le16_to_cpu(desc->wMaxPacketSize) & 0x3ff; | |
349 | ||
350 | /* drivers must not request bad settings, since lower levels | |
351 | * (hardware or its drivers) may not check. some endpoints | |
352 | * can't do iso, many have maxpacket limitations, etc. | |
353 | * | |
354 | * since this "hardware" driver is here to help debugging, we | |
355 | * have some extra sanity checks. (there could be more though, | |
356 | * especially for "ep9out" style fixed function ones.) | |
357 | */ | |
358 | retval = -EINVAL; | |
359 | switch (desc->bmAttributes & 0x03) { | |
360 | case USB_ENDPOINT_XFER_BULK: | |
361 | if (strstr (ep->ep.name, "-iso") | |
362 | || strstr (ep->ep.name, "-int")) { | |
363 | goto done; | |
364 | } | |
365 | switch (dum->gadget.speed) { | |
366 | case USB_SPEED_HIGH: | |
367 | if (max == 512) | |
368 | break; | |
9063ff44 IL |
369 | goto done; |
370 | case USB_SPEED_FULL: | |
371 | if (max == 8 || max == 16 || max == 32 || max == 64) | |
1da177e4 LT |
372 | /* we'll fake any legal size */ |
373 | break; | |
9063ff44 IL |
374 | /* save a return statement */ |
375 | default: | |
376 | goto done; | |
1da177e4 LT |
377 | } |
378 | break; | |
379 | case USB_ENDPOINT_XFER_INT: | |
380 | if (strstr (ep->ep.name, "-iso")) /* bulk is ok */ | |
381 | goto done; | |
382 | /* real hardware might not handle all packet sizes */ | |
383 | switch (dum->gadget.speed) { | |
384 | case USB_SPEED_HIGH: | |
385 | if (max <= 1024) | |
386 | break; | |
387 | /* save a return statement */ | |
388 | case USB_SPEED_FULL: | |
389 | if (max <= 64) | |
390 | break; | |
391 | /* save a return statement */ | |
392 | default: | |
393 | if (max <= 8) | |
394 | break; | |
395 | goto done; | |
396 | } | |
397 | break; | |
398 | case USB_ENDPOINT_XFER_ISOC: | |
399 | if (strstr (ep->ep.name, "-bulk") | |
400 | || strstr (ep->ep.name, "-int")) | |
401 | goto done; | |
402 | /* real hardware might not handle all packet sizes */ | |
403 | switch (dum->gadget.speed) { | |
404 | case USB_SPEED_HIGH: | |
405 | if (max <= 1024) | |
406 | break; | |
407 | /* save a return statement */ | |
408 | case USB_SPEED_FULL: | |
409 | if (max <= 1023) | |
410 | break; | |
411 | /* save a return statement */ | |
412 | default: | |
413 | goto done; | |
414 | } | |
415 | break; | |
416 | default: | |
417 | /* few chips support control except on ep0 */ | |
418 | goto done; | |
419 | } | |
420 | ||
421 | _ep->maxpacket = max; | |
422 | ep->desc = desc; | |
423 | ||
d9b76251 | 424 | dev_dbg (udc_dev(dum), "enabled %s (ep%d%s-%s) maxpacket %d\n", |
1da177e4 LT |
425 | _ep->name, |
426 | desc->bEndpointAddress & 0x0f, | |
427 | (desc->bEndpointAddress & USB_DIR_IN) ? "in" : "out", | |
428 | ({ char *val; | |
429 | switch (desc->bmAttributes & 0x03) { | |
430 | case USB_ENDPOINT_XFER_BULK: val = "bulk"; break; | |
431 | case USB_ENDPOINT_XFER_ISOC: val = "iso"; break; | |
432 | case USB_ENDPOINT_XFER_INT: val = "intr"; break; | |
433 | default: val = "ctrl"; break; | |
434 | }; val; }), | |
435 | max); | |
436 | ||
437 | /* at this point real hardware should be NAKing transfers | |
438 | * to that endpoint, until a buffer is queued to it. | |
439 | */ | |
851a526d | 440 | ep->halted = ep->wedged = 0; |
1da177e4 LT |
441 | retval = 0; |
442 | done: | |
443 | return retval; | |
444 | } | |
445 | ||
1da177e4 LT |
446 | static int dummy_disable (struct usb_ep *_ep) |
447 | { | |
448 | struct dummy_ep *ep; | |
449 | struct dummy *dum; | |
450 | unsigned long flags; | |
451 | int retval; | |
452 | ||
453 | ep = usb_ep_to_dummy_ep (_ep); | |
454 | if (!_ep || !ep->desc || _ep->name == ep0name) | |
455 | return -EINVAL; | |
456 | dum = ep_to_dummy (ep); | |
457 | ||
458 | spin_lock_irqsave (&dum->lock, flags); | |
459 | ep->desc = NULL; | |
460 | retval = 0; | |
461 | nuke (dum, ep); | |
462 | spin_unlock_irqrestore (&dum->lock, flags); | |
463 | ||
d9b76251 | 464 | dev_dbg (udc_dev(dum), "disabled %s\n", _ep->name); |
1da177e4 LT |
465 | return retval; |
466 | } | |
467 | ||
468 | static struct usb_request * | |
55016f10 | 469 | dummy_alloc_request (struct usb_ep *_ep, gfp_t mem_flags) |
1da177e4 LT |
470 | { |
471 | struct dummy_ep *ep; | |
472 | struct dummy_request *req; | |
473 | ||
474 | if (!_ep) | |
475 | return NULL; | |
476 | ep = usb_ep_to_dummy_ep (_ep); | |
477 | ||
7039f422 | 478 | req = kzalloc(sizeof(*req), mem_flags); |
1da177e4 LT |
479 | if (!req) |
480 | return NULL; | |
1da177e4 LT |
481 | INIT_LIST_HEAD (&req->queue); |
482 | return &req->req; | |
483 | } | |
484 | ||
485 | static void | |
486 | dummy_free_request (struct usb_ep *_ep, struct usb_request *_req) | |
487 | { | |
488 | struct dummy_ep *ep; | |
489 | struct dummy_request *req; | |
490 | ||
491 | ep = usb_ep_to_dummy_ep (_ep); | |
492 | if (!ep || !_req || (!ep->desc && _ep->name != ep0name)) | |
493 | return; | |
494 | ||
495 | req = usb_request_to_dummy_request (_req); | |
496 | WARN_ON (!list_empty (&req->queue)); | |
497 | kfree (req); | |
498 | } | |
499 | ||
1da177e4 LT |
500 | static void |
501 | fifo_complete (struct usb_ep *ep, struct usb_request *req) | |
502 | { | |
503 | } | |
504 | ||
505 | static int | |
5db539e4 | 506 | dummy_queue (struct usb_ep *_ep, struct usb_request *_req, |
55016f10 | 507 | gfp_t mem_flags) |
1da177e4 LT |
508 | { |
509 | struct dummy_ep *ep; | |
510 | struct dummy_request *req; | |
511 | struct dummy *dum; | |
512 | unsigned long flags; | |
513 | ||
514 | req = usb_request_to_dummy_request (_req); | |
515 | if (!_req || !list_empty (&req->queue) || !_req->complete) | |
516 | return -EINVAL; | |
517 | ||
518 | ep = usb_ep_to_dummy_ep (_ep); | |
519 | if (!_ep || (!ep->desc && _ep->name != ep0name)) | |
520 | return -EINVAL; | |
521 | ||
522 | dum = ep_to_dummy (ep); | |
523 | if (!dum->driver || !is_enabled (dum)) | |
524 | return -ESHUTDOWN; | |
525 | ||
526 | #if 0 | |
d9b76251 | 527 | dev_dbg (udc_dev(dum), "ep %p queue req %p to %s, len %d buf %p\n", |
1da177e4 LT |
528 | ep, _req, _ep->name, _req->length, _req->buf); |
529 | #endif | |
530 | ||
531 | _req->status = -EINPROGRESS; | |
532 | _req->actual = 0; | |
533 | spin_lock_irqsave (&dum->lock, flags); | |
534 | ||
535 | /* implement an emulated single-request FIFO */ | |
536 | if (ep->desc && (ep->desc->bEndpointAddress & USB_DIR_IN) && | |
537 | list_empty (&dum->fifo_req.queue) && | |
538 | list_empty (&ep->queue) && | |
539 | _req->length <= FIFO_SIZE) { | |
540 | req = &dum->fifo_req; | |
541 | req->req = *_req; | |
542 | req->req.buf = dum->fifo_buf; | |
543 | memcpy (dum->fifo_buf, _req->buf, _req->length); | |
544 | req->req.context = dum; | |
545 | req->req.complete = fifo_complete; | |
546 | ||
c728df70 | 547 | list_add_tail(&req->queue, &ep->queue); |
1da177e4 LT |
548 | spin_unlock (&dum->lock); |
549 | _req->actual = _req->length; | |
550 | _req->status = 0; | |
551 | _req->complete (_ep, _req); | |
552 | spin_lock (&dum->lock); | |
c728df70 DB |
553 | } else |
554 | list_add_tail(&req->queue, &ep->queue); | |
1da177e4 LT |
555 | spin_unlock_irqrestore (&dum->lock, flags); |
556 | ||
557 | /* real hardware would likely enable transfers here, in case | |
558 | * it'd been left NAKing. | |
559 | */ | |
560 | return 0; | |
561 | } | |
562 | ||
563 | static int dummy_dequeue (struct usb_ep *_ep, struct usb_request *_req) | |
564 | { | |
565 | struct dummy_ep *ep; | |
566 | struct dummy *dum; | |
567 | int retval = -EINVAL; | |
568 | unsigned long flags; | |
569 | struct dummy_request *req = NULL; | |
570 | ||
571 | if (!_ep || !_req) | |
572 | return retval; | |
573 | ep = usb_ep_to_dummy_ep (_ep); | |
574 | dum = ep_to_dummy (ep); | |
575 | ||
576 | if (!dum->driver) | |
577 | return -ESHUTDOWN; | |
578 | ||
b4dbda1a AS |
579 | local_irq_save (flags); |
580 | spin_lock (&dum->lock); | |
1da177e4 LT |
581 | list_for_each_entry (req, &ep->queue, queue) { |
582 | if (&req->req == _req) { | |
583 | list_del_init (&req->queue); | |
584 | _req->status = -ECONNRESET; | |
585 | retval = 0; | |
586 | break; | |
587 | } | |
588 | } | |
b4dbda1a | 589 | spin_unlock (&dum->lock); |
1da177e4 LT |
590 | |
591 | if (retval == 0) { | |
d9b76251 | 592 | dev_dbg (udc_dev(dum), |
1da177e4 LT |
593 | "dequeued req %p from %s, len %d buf %p\n", |
594 | req, _ep->name, _req->length, _req->buf); | |
595 | _req->complete (_ep, _req); | |
596 | } | |
b4dbda1a | 597 | local_irq_restore (flags); |
1da177e4 LT |
598 | return retval; |
599 | } | |
600 | ||
601 | static int | |
851a526d | 602 | dummy_set_halt_and_wedge(struct usb_ep *_ep, int value, int wedged) |
1da177e4 LT |
603 | { |
604 | struct dummy_ep *ep; | |
605 | struct dummy *dum; | |
606 | ||
607 | if (!_ep) | |
608 | return -EINVAL; | |
609 | ep = usb_ep_to_dummy_ep (_ep); | |
610 | dum = ep_to_dummy (ep); | |
611 | if (!dum->driver) | |
612 | return -ESHUTDOWN; | |
613 | if (!value) | |
851a526d | 614 | ep->halted = ep->wedged = 0; |
1da177e4 LT |
615 | else if (ep->desc && (ep->desc->bEndpointAddress & USB_DIR_IN) && |
616 | !list_empty (&ep->queue)) | |
617 | return -EAGAIN; | |
851a526d | 618 | else { |
1da177e4 | 619 | ep->halted = 1; |
851a526d AS |
620 | if (wedged) |
621 | ep->wedged = 1; | |
622 | } | |
1da177e4 LT |
623 | /* FIXME clear emulated data toggle too */ |
624 | return 0; | |
625 | } | |
626 | ||
851a526d AS |
627 | static int |
628 | dummy_set_halt(struct usb_ep *_ep, int value) | |
629 | { | |
630 | return dummy_set_halt_and_wedge(_ep, value, 0); | |
631 | } | |
632 | ||
633 | static int dummy_set_wedge(struct usb_ep *_ep) | |
634 | { | |
635 | if (!_ep || _ep->name == ep0name) | |
636 | return -EINVAL; | |
637 | return dummy_set_halt_and_wedge(_ep, 1, 1); | |
638 | } | |
639 | ||
1da177e4 LT |
640 | static const struct usb_ep_ops dummy_ep_ops = { |
641 | .enable = dummy_enable, | |
642 | .disable = dummy_disable, | |
643 | ||
644 | .alloc_request = dummy_alloc_request, | |
645 | .free_request = dummy_free_request, | |
646 | ||
1da177e4 LT |
647 | .queue = dummy_queue, |
648 | .dequeue = dummy_dequeue, | |
649 | ||
650 | .set_halt = dummy_set_halt, | |
851a526d | 651 | .set_wedge = dummy_set_wedge, |
1da177e4 LT |
652 | }; |
653 | ||
654 | /*-------------------------------------------------------------------------*/ | |
655 | ||
656 | /* there are both host and device side versions of this call ... */ | |
657 | static int dummy_g_get_frame (struct usb_gadget *_gadget) | |
658 | { | |
659 | struct timeval tv; | |
660 | ||
661 | do_gettimeofday (&tv); | |
662 | return tv.tv_usec / 1000; | |
663 | } | |
664 | ||
665 | static int dummy_wakeup (struct usb_gadget *_gadget) | |
666 | { | |
667 | struct dummy *dum; | |
668 | ||
669 | dum = gadget_to_dummy (_gadget); | |
391eca9d | 670 | if (!(dum->devstatus & ( (1 << USB_DEVICE_B_HNP_ENABLE) |
5742b0c9 | 671 | | (1 << USB_DEVICE_REMOTE_WAKEUP)))) |
1da177e4 | 672 | return -EINVAL; |
391eca9d AS |
673 | if ((dum->port_status & USB_PORT_STAT_CONNECTION) == 0) |
674 | return -ENOLINK; | |
675 | if ((dum->port_status & USB_PORT_STAT_SUSPEND) == 0 && | |
676 | dum->rh_state != DUMMY_RH_SUSPENDED) | |
677 | return -EIO; | |
678 | ||
679 | /* FIXME: What if the root hub is suspended but the port isn't? */ | |
1da177e4 LT |
680 | |
681 | /* hub notices our request, issues downstream resume, etc */ | |
682 | dum->resuming = 1; | |
f1c39fad | 683 | dum->re_timeout = jiffies + msecs_to_jiffies(20); |
685eb93f | 684 | mod_timer (&dummy_to_hcd (dum)->rh_timer, dum->re_timeout); |
1da177e4 LT |
685 | return 0; |
686 | } | |
687 | ||
688 | static int dummy_set_selfpowered (struct usb_gadget *_gadget, int value) | |
689 | { | |
690 | struct dummy *dum; | |
691 | ||
692 | dum = gadget_to_dummy (_gadget); | |
693 | if (value) | |
694 | dum->devstatus |= (1 << USB_DEVICE_SELF_POWERED); | |
695 | else | |
696 | dum->devstatus &= ~(1 << USB_DEVICE_SELF_POWERED); | |
697 | return 0; | |
698 | } | |
699 | ||
f1c39fad AS |
700 | static int dummy_pullup (struct usb_gadget *_gadget, int value) |
701 | { | |
702 | struct dummy *dum; | |
703 | unsigned long flags; | |
704 | ||
705 | dum = gadget_to_dummy (_gadget); | |
706 | spin_lock_irqsave (&dum->lock, flags); | |
707 | dum->pullup = (value != 0); | |
708 | set_link_state (dum); | |
709 | spin_unlock_irqrestore (&dum->lock, flags); | |
685eb93f AS |
710 | |
711 | usb_hcd_poll_rh_status (dummy_to_hcd (dum)); | |
f1c39fad AS |
712 | return 0; |
713 | } | |
714 | ||
1da177e4 LT |
715 | static const struct usb_gadget_ops dummy_ops = { |
716 | .get_frame = dummy_g_get_frame, | |
717 | .wakeup = dummy_wakeup, | |
718 | .set_selfpowered = dummy_set_selfpowered, | |
f1c39fad | 719 | .pullup = dummy_pullup, |
1da177e4 LT |
720 | }; |
721 | ||
722 | /*-------------------------------------------------------------------------*/ | |
723 | ||
724 | /* "function" sysfs attribute */ | |
725 | static ssize_t | |
10523b3b | 726 | show_function (struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
727 | { |
728 | struct dummy *dum = gadget_dev_to_dummy (dev); | |
729 | ||
730 | if (!dum->driver || !dum->driver->function) | |
731 | return 0; | |
732 | return scnprintf (buf, PAGE_SIZE, "%s\n", dum->driver->function); | |
733 | } | |
cc095b0b | 734 | static DEVICE_ATTR (function, S_IRUGO, show_function, NULL); |
1da177e4 LT |
735 | |
736 | /*-------------------------------------------------------------------------*/ | |
737 | ||
738 | /* | |
739 | * Driver registration/unregistration. | |
740 | * | |
741 | * This is basically hardware-specific; there's usually only one real USB | |
742 | * device (not host) controller since that's how USB devices are intended | |
743 | * to work. So most implementations of these api calls will rely on the | |
744 | * fact that only one driver will ever bind to the hardware. But curious | |
745 | * hardware can be built with discrete components, so the gadget API doesn't | |
746 | * require that assumption. | |
747 | * | |
748 | * For this emulator, it might be convenient to create a usb slave device | |
749 | * for each driver that registers: just add to a big root hub. | |
750 | */ | |
751 | ||
1da177e4 LT |
752 | int |
753 | usb_gadget_register_driver (struct usb_gadget_driver *driver) | |
754 | { | |
755 | struct dummy *dum = the_controller; | |
756 | int retval, i; | |
757 | ||
758 | if (!dum) | |
759 | return -EINVAL; | |
760 | if (dum->driver) | |
761 | return -EBUSY; | |
6bea476c | 762 | if (!driver->bind || !driver->setup |
1da177e4 LT |
763 | || driver->speed == USB_SPEED_UNKNOWN) |
764 | return -EINVAL; | |
765 | ||
766 | /* | |
767 | * SLAVE side init ... the layer above hardware, which | |
768 | * can't enumerate without help from the driver we're binding. | |
769 | */ | |
5742b0c9 | 770 | |
1da177e4 | 771 | dum->devstatus = 0; |
1da177e4 LT |
772 | |
773 | INIT_LIST_HEAD (&dum->gadget.ep_list); | |
774 | for (i = 0; i < DUMMY_ENDPOINTS; i++) { | |
775 | struct dummy_ep *ep = &dum->ep [i]; | |
776 | ||
777 | if (!ep_name [i]) | |
778 | break; | |
779 | ep->ep.name = ep_name [i]; | |
780 | ep->ep.ops = &dummy_ep_ops; | |
781 | list_add_tail (&ep->ep.ep_list, &dum->gadget.ep_list); | |
851a526d AS |
782 | ep->halted = ep->wedged = ep->already_seen = |
783 | ep->setup_stage = 0; | |
1da177e4 LT |
784 | ep->ep.maxpacket = ~0; |
785 | ep->last_io = jiffies; | |
786 | ep->gadget = &dum->gadget; | |
787 | ep->desc = NULL; | |
788 | INIT_LIST_HEAD (&ep->queue); | |
789 | } | |
790 | ||
791 | dum->gadget.ep0 = &dum->ep [0].ep; | |
792 | dum->ep [0].ep.maxpacket = 64; | |
793 | list_del_init (&dum->ep [0].ep.ep_list); | |
794 | INIT_LIST_HEAD(&dum->fifo_req.queue); | |
795 | ||
59331017 | 796 | driver->driver.bus = NULL; |
1da177e4 LT |
797 | dum->driver = driver; |
798 | dum->gadget.dev.driver = &driver->driver; | |
d9b76251 | 799 | dev_dbg (udc_dev(dum), "binding gadget driver '%s'\n", |
1da177e4 | 800 | driver->driver.name); |
59331017 AS |
801 | retval = driver->bind(&dum->gadget); |
802 | if (retval) { | |
803 | dum->driver = NULL; | |
804 | dum->gadget.dev.driver = NULL; | |
805 | return retval; | |
806 | } | |
1da177e4 LT |
807 | |
808 | /* khubd will enumerate this in a while */ | |
f1c39fad AS |
809 | spin_lock_irq (&dum->lock); |
810 | dum->pullup = 1; | |
811 | set_link_state (dum); | |
812 | spin_unlock_irq (&dum->lock); | |
685eb93f AS |
813 | |
814 | usb_hcd_poll_rh_status (dummy_to_hcd (dum)); | |
1da177e4 LT |
815 | return 0; |
816 | } | |
817 | EXPORT_SYMBOL (usb_gadget_register_driver); | |
818 | ||
1da177e4 LT |
819 | int |
820 | usb_gadget_unregister_driver (struct usb_gadget_driver *driver) | |
821 | { | |
822 | struct dummy *dum = the_controller; | |
823 | unsigned long flags; | |
824 | ||
825 | if (!dum) | |
826 | return -ENODEV; | |
6bea476c | 827 | if (!driver || driver != dum->driver || !driver->unbind) |
1da177e4 LT |
828 | return -EINVAL; |
829 | ||
d9b76251 | 830 | dev_dbg (udc_dev(dum), "unregister gadget driver '%s'\n", |
1da177e4 LT |
831 | driver->driver.name); |
832 | ||
833 | spin_lock_irqsave (&dum->lock, flags); | |
f1c39fad AS |
834 | dum->pullup = 0; |
835 | set_link_state (dum); | |
1da177e4 LT |
836 | spin_unlock_irqrestore (&dum->lock, flags); |
837 | ||
838 | driver->unbind (&dum->gadget); | |
59331017 | 839 | dum->gadget.dev.driver = NULL; |
1da177e4 LT |
840 | dum->driver = NULL; |
841 | ||
f1c39fad AS |
842 | spin_lock_irqsave (&dum->lock, flags); |
843 | dum->pullup = 0; | |
844 | set_link_state (dum); | |
845 | spin_unlock_irqrestore (&dum->lock, flags); | |
846 | ||
685eb93f | 847 | usb_hcd_poll_rh_status (dummy_to_hcd (dum)); |
1da177e4 LT |
848 | return 0; |
849 | } | |
850 | EXPORT_SYMBOL (usb_gadget_unregister_driver); | |
851 | ||
852 | #undef is_enabled | |
853 | ||
cc095b0b AS |
854 | /* just declare this in any driver that really need it */ |
855 | extern int net2280_set_fifo_mode (struct usb_gadget *gadget, int mode); | |
856 | ||
1da177e4 LT |
857 | int net2280_set_fifo_mode (struct usb_gadget *gadget, int mode) |
858 | { | |
859 | return -ENOSYS; | |
860 | } | |
861 | EXPORT_SYMBOL (net2280_set_fifo_mode); | |
862 | ||
d9b76251 AS |
863 | |
864 | /* The gadget structure is stored inside the hcd structure and will be | |
865 | * released along with it. */ | |
866 | static void | |
867 | dummy_gadget_release (struct device *dev) | |
868 | { | |
d9b76251 AS |
869 | struct dummy *dum = gadget_dev_to_dummy (dev); |
870 | ||
17200583 | 871 | usb_put_hcd (dummy_to_hcd (dum)); |
d9b76251 AS |
872 | } |
873 | ||
8364d6b0 | 874 | static int dummy_udc_probe (struct platform_device *pdev) |
d9b76251 AS |
875 | { |
876 | struct dummy *dum = the_controller; | |
877 | int rc; | |
878 | ||
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); | |
890 | if (rc < 0) | |
891 | return rc; | |
892 | ||
17200583 | 893 | usb_get_hcd (dummy_to_hcd (dum)); |
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 | ||
1200 | /* drive both sides of the transfers; looks like irq handlers to | |
1201 | * both drivers except the callbacks aren't in_irq(). | |
1202 | */ | |
1203 | static void dummy_timer (unsigned long _dum) | |
1204 | { | |
1205 | struct dummy *dum = (struct dummy *) _dum; | |
1206 | struct urbp *urbp, *tmp; | |
1207 | unsigned long flags; | |
1208 | int limit, total; | |
1209 | int i; | |
1210 | ||
1211 | /* simplistic model for one frame's bandwidth */ | |
1212 | switch (dum->gadget.speed) { | |
1213 | case USB_SPEED_LOW: | |
1214 | total = 8/*bytes*/ * 12/*packets*/; | |
1215 | break; | |
1216 | case USB_SPEED_FULL: | |
1217 | total = 64/*bytes*/ * 19/*packets*/; | |
1218 | break; | |
1219 | case USB_SPEED_HIGH: | |
1220 | total = 512/*bytes*/ * 13/*packets*/ * 8/*uframes*/; | |
1221 | break; | |
1222 | default: | |
1223 | dev_err (dummy_dev(dum), "bogus device speed\n"); | |
1224 | return; | |
1225 | } | |
1226 | ||
1227 | /* FIXME if HZ != 1000 this will probably misbehave ... */ | |
1228 | ||
1229 | /* look at each urb queued by the host side driver */ | |
1230 | spin_lock_irqsave (&dum->lock, flags); | |
1231 | ||
1232 | if (!dum->udev) { | |
1233 | dev_err (dummy_dev(dum), | |
1234 | "timer fired with no URBs pending?\n"); | |
1235 | spin_unlock_irqrestore (&dum->lock, flags); | |
1236 | return; | |
1237 | } | |
1238 | ||
1239 | for (i = 0; i < DUMMY_ENDPOINTS; i++) { | |
1240 | if (!ep_name [i]) | |
1241 | break; | |
1242 | dum->ep [i].already_seen = 0; | |
1243 | } | |
1244 | ||
1245 | restart: | |
1246 | list_for_each_entry_safe (urbp, tmp, &dum->urbp_list, urbp_list) { | |
1247 | struct urb *urb; | |
1248 | struct dummy_request *req; | |
1249 | u8 address; | |
1250 | struct dummy_ep *ep = NULL; | |
1251 | int type; | |
4d2f110c | 1252 | int status = -EINPROGRESS; |
1da177e4 LT |
1253 | |
1254 | urb = urbp->urb; | |
eb231054 | 1255 | if (urb->unlinked) |
1da177e4 | 1256 | goto return_urb; |
eb231054 | 1257 | else if (dum->rh_state != DUMMY_RH_RUNNING) |
391eca9d | 1258 | continue; |
1da177e4 LT |
1259 | type = usb_pipetype (urb->pipe); |
1260 | ||
1261 | /* used up this frame's non-periodic bandwidth? | |
1262 | * FIXME there's infinite bandwidth for control and | |
1263 | * periodic transfers ... unrealistic. | |
1264 | */ | |
1265 | if (total <= 0 && type == PIPE_BULK) | |
1266 | continue; | |
1267 | ||
1268 | /* find the gadget's ep for this request (if configured) */ | |
1269 | address = usb_pipeendpoint (urb->pipe); | |
1270 | if (usb_pipein (urb->pipe)) | |
1271 | address |= USB_DIR_IN; | |
1272 | ep = find_endpoint(dum, address); | |
1273 | if (!ep) { | |
1274 | /* set_configuration() disagreement */ | |
1275 | dev_dbg (dummy_dev(dum), | |
1276 | "no ep configured for urb %p\n", | |
1277 | urb); | |
4d2f110c | 1278 | status = -EPROTO; |
1da177e4 LT |
1279 | goto return_urb; |
1280 | } | |
1281 | ||
1282 | if (ep->already_seen) | |
1283 | continue; | |
1284 | ep->already_seen = 1; | |
1285 | if (ep == &dum->ep [0] && urb->error_count) { | |
1286 | ep->setup_stage = 1; /* a new urb */ | |
1287 | urb->error_count = 0; | |
1288 | } | |
1289 | if (ep->halted && !ep->setup_stage) { | |
1290 | /* NOTE: must not be iso! */ | |
1291 | dev_dbg (dummy_dev(dum), "ep %s halted, urb %p\n", | |
1292 | ep->ep.name, urb); | |
4d2f110c | 1293 | status = -EPIPE; |
1da177e4 LT |
1294 | goto return_urb; |
1295 | } | |
1296 | /* FIXME make sure both ends agree on maxpacket */ | |
1297 | ||
1298 | /* handle control requests */ | |
1299 | if (ep == &dum->ep [0] && ep->setup_stage) { | |
1300 | struct usb_ctrlrequest setup; | |
1301 | int value = 1; | |
1302 | struct dummy_ep *ep2; | |
cc095b0b AS |
1303 | unsigned w_index; |
1304 | unsigned w_value; | |
1da177e4 LT |
1305 | |
1306 | setup = *(struct usb_ctrlrequest*) urb->setup_packet; | |
cc095b0b AS |
1307 | w_index = le16_to_cpu(setup.wIndex); |
1308 | w_value = le16_to_cpu(setup.wValue); | |
1309 | if (le16_to_cpu(setup.wLength) != | |
1310 | urb->transfer_buffer_length) { | |
4d2f110c | 1311 | status = -EOVERFLOW; |
1da177e4 LT |
1312 | goto return_urb; |
1313 | } | |
1314 | ||
1315 | /* paranoia, in case of stale queued data */ | |
1316 | list_for_each_entry (req, &ep->queue, queue) { | |
1317 | list_del_init (&req->queue); | |
1318 | req->req.status = -EOVERFLOW; | |
d9b76251 | 1319 | dev_dbg (udc_dev(dum), "stale req = %p\n", |
1da177e4 LT |
1320 | req); |
1321 | ||
1322 | spin_unlock (&dum->lock); | |
1323 | req->req.complete (&ep->ep, &req->req); | |
1324 | spin_lock (&dum->lock); | |
1325 | ep->already_seen = 0; | |
1326 | goto restart; | |
1327 | } | |
1328 | ||
1329 | /* gadget driver never sees set_address or operations | |
1330 | * on standard feature flags. some hardware doesn't | |
1331 | * even expose them. | |
1332 | */ | |
1333 | ep->last_io = jiffies; | |
1334 | ep->setup_stage = 0; | |
1335 | ep->halted = 0; | |
1336 | switch (setup.bRequest) { | |
1337 | case USB_REQ_SET_ADDRESS: | |
1338 | if (setup.bRequestType != Dev_Request) | |
1339 | break; | |
cc095b0b | 1340 | dum->address = w_value; |
4d2f110c | 1341 | status = 0; |
d9b76251 | 1342 | dev_dbg (udc_dev(dum), "set_address = %d\n", |
cc095b0b | 1343 | w_value); |
1da177e4 LT |
1344 | value = 0; |
1345 | break; | |
1346 | case USB_REQ_SET_FEATURE: | |
1347 | if (setup.bRequestType == Dev_Request) { | |
1348 | value = 0; | |
cc095b0b | 1349 | switch (w_value) { |
1da177e4 LT |
1350 | case USB_DEVICE_REMOTE_WAKEUP: |
1351 | break; | |
5742b0c9 AS |
1352 | case USB_DEVICE_B_HNP_ENABLE: |
1353 | dum->gadget.b_hnp_enable = 1; | |
1354 | break; | |
1355 | case USB_DEVICE_A_HNP_SUPPORT: | |
1356 | dum->gadget.a_hnp_support = 1; | |
1357 | break; | |
1358 | case USB_DEVICE_A_ALT_HNP_SUPPORT: | |
1359 | dum->gadget.a_alt_hnp_support | |
1360 | = 1; | |
1361 | break; | |
1da177e4 LT |
1362 | default: |
1363 | value = -EOPNOTSUPP; | |
1364 | } | |
1365 | if (value == 0) { | |
1366 | dum->devstatus |= | |
cc095b0b | 1367 | (1 << w_value); |
4d2f110c | 1368 | status = 0; |
1da177e4 LT |
1369 | } |
1370 | ||
1371 | } else if (setup.bRequestType == Ep_Request) { | |
1372 | // endpoint halt | |
cc095b0b | 1373 | ep2 = find_endpoint (dum, w_index); |
851a526d | 1374 | if (!ep2 || ep2->ep.name == ep0name) { |
1da177e4 LT |
1375 | value = -EOPNOTSUPP; |
1376 | break; | |
1377 | } | |
1378 | ep2->halted = 1; | |
1379 | value = 0; | |
4d2f110c | 1380 | status = 0; |
1da177e4 LT |
1381 | } |
1382 | break; | |
1383 | case USB_REQ_CLEAR_FEATURE: | |
1384 | if (setup.bRequestType == Dev_Request) { | |
cc095b0b | 1385 | switch (w_value) { |
1da177e4 LT |
1386 | case USB_DEVICE_REMOTE_WAKEUP: |
1387 | dum->devstatus &= ~(1 << | |
1388 | USB_DEVICE_REMOTE_WAKEUP); | |
1389 | value = 0; | |
4d2f110c | 1390 | status = 0; |
1da177e4 LT |
1391 | break; |
1392 | default: | |
1393 | value = -EOPNOTSUPP; | |
1394 | break; | |
1395 | } | |
1396 | } else if (setup.bRequestType == Ep_Request) { | |
1397 | // endpoint halt | |
cc095b0b | 1398 | ep2 = find_endpoint (dum, w_index); |
1da177e4 LT |
1399 | if (!ep2) { |
1400 | value = -EOPNOTSUPP; | |
1401 | break; | |
1402 | } | |
851a526d AS |
1403 | if (!ep2->wedged) |
1404 | ep2->halted = 0; | |
1da177e4 | 1405 | value = 0; |
4d2f110c | 1406 | status = 0; |
1da177e4 LT |
1407 | } |
1408 | break; | |
1409 | case USB_REQ_GET_STATUS: | |
1410 | if (setup.bRequestType == Dev_InRequest | |
1411 | || setup.bRequestType | |
1412 | == Intf_InRequest | |
1413 | || setup.bRequestType | |
1414 | == Ep_InRequest | |
1415 | ) { | |
1416 | char *buf; | |
1417 | ||
1418 | // device: remote wakeup, selfpowered | |
1419 | // interface: nothing | |
1420 | // endpoint: halt | |
1421 | buf = (char *)urb->transfer_buffer; | |
1422 | if (urb->transfer_buffer_length > 0) { | |
1423 | if (setup.bRequestType == | |
1424 | Ep_InRequest) { | |
cc095b0b | 1425 | ep2 = find_endpoint (dum, w_index); |
1da177e4 LT |
1426 | if (!ep2) { |
1427 | value = -EOPNOTSUPP; | |
1428 | break; | |
1429 | } | |
1430 | buf [0] = ep2->halted; | |
1431 | } else if (setup.bRequestType == | |
1432 | Dev_InRequest) { | |
1433 | buf [0] = (u8) | |
1434 | dum->devstatus; | |
1435 | } else | |
1436 | buf [0] = 0; | |
1437 | } | |
1438 | if (urb->transfer_buffer_length > 1) | |
1439 | buf [1] = 0; | |
1440 | urb->actual_length = min (2, | |
1441 | urb->transfer_buffer_length); | |
1442 | value = 0; | |
4d2f110c | 1443 | status = 0; |
1da177e4 LT |
1444 | } |
1445 | break; | |
1446 | } | |
1447 | ||
1448 | /* gadget driver handles all other requests. block | |
1449 | * until setup() returns; no reentrancy issues etc. | |
1450 | */ | |
1451 | if (value > 0) { | |
1452 | spin_unlock (&dum->lock); | |
1453 | value = dum->driver->setup (&dum->gadget, | |
1454 | &setup); | |
1455 | spin_lock (&dum->lock); | |
1456 | ||
1457 | if (value >= 0) { | |
1458 | /* no delays (max 64KB data stage) */ | |
1459 | limit = 64*1024; | |
1460 | goto treat_control_like_bulk; | |
1461 | } | |
1462 | /* error, see below */ | |
1463 | } | |
1464 | ||
1465 | if (value < 0) { | |
1466 | if (value != -EOPNOTSUPP) | |
d9b76251 | 1467 | dev_dbg (udc_dev(dum), |
1da177e4 LT |
1468 | "setup --> %d\n", |
1469 | value); | |
4d2f110c | 1470 | status = -EPIPE; |
1da177e4 LT |
1471 | urb->actual_length = 0; |
1472 | } | |
1473 | ||
1474 | goto return_urb; | |
1475 | } | |
1476 | ||
1477 | /* non-control requests */ | |
1478 | limit = total; | |
1479 | switch (usb_pipetype (urb->pipe)) { | |
1480 | case PIPE_ISOCHRONOUS: | |
1481 | /* FIXME is it urb->interval since the last xfer? | |
1482 | * use urb->iso_frame_desc[i]. | |
1483 | * complete whether or not ep has requests queued. | |
1484 | * report random errors, to debug drivers. | |
1485 | */ | |
1486 | limit = max (limit, periodic_bytes (dum, ep)); | |
4d2f110c | 1487 | status = -ENOSYS; |
1da177e4 LT |
1488 | break; |
1489 | ||
1490 | case PIPE_INTERRUPT: | |
1491 | /* FIXME is it urb->interval since the last xfer? | |
1492 | * this almost certainly polls too fast. | |
1493 | */ | |
1494 | limit = max (limit, periodic_bytes (dum, ep)); | |
1495 | /* FALLTHROUGH */ | |
1496 | ||
1497 | // case PIPE_BULK: case PIPE_CONTROL: | |
1498 | default: | |
1499 | treat_control_like_bulk: | |
1500 | ep->last_io = jiffies; | |
4d2f110c | 1501 | total = transfer(dum, urb, ep, limit, &status); |
1da177e4 LT |
1502 | break; |
1503 | } | |
1504 | ||
1505 | /* incomplete transfer? */ | |
4d2f110c | 1506 | if (status == -EINPROGRESS) |
1da177e4 LT |
1507 | continue; |
1508 | ||
1509 | return_urb: | |
1da177e4 LT |
1510 | list_del (&urbp->urbp_list); |
1511 | kfree (urbp); | |
1512 | if (ep) | |
1513 | ep->already_seen = ep->setup_stage = 0; | |
1514 | ||
e9df41c5 | 1515 | usb_hcd_unlink_urb_from_ep(dummy_to_hcd(dum), urb); |
1da177e4 | 1516 | spin_unlock (&dum->lock); |
4a00027d | 1517 | usb_hcd_giveback_urb(dummy_to_hcd(dum), urb, status); |
1da177e4 LT |
1518 | spin_lock (&dum->lock); |
1519 | ||
1520 | goto restart; | |
1521 | } | |
1522 | ||
391eca9d | 1523 | if (list_empty (&dum->urbp_list)) { |
1da177e4 LT |
1524 | usb_put_dev (dum->udev); |
1525 | dum->udev = NULL; | |
391eca9d AS |
1526 | } else if (dum->rh_state == DUMMY_RH_RUNNING) { |
1527 | /* want a 1 msec delay here */ | |
1528 | mod_timer (&dum->timer, jiffies + msecs_to_jiffies(1)); | |
1da177e4 LT |
1529 | } |
1530 | ||
1531 | spin_unlock_irqrestore (&dum->lock, flags); | |
1532 | } | |
1533 | ||
1534 | /*-------------------------------------------------------------------------*/ | |
1535 | ||
1536 | #define PORT_C_MASK \ | |
c2db8b5e AS |
1537 | ((USB_PORT_STAT_C_CONNECTION \ |
1538 | | USB_PORT_STAT_C_ENABLE \ | |
1539 | | USB_PORT_STAT_C_SUSPEND \ | |
1540 | | USB_PORT_STAT_C_OVERCURRENT \ | |
1541 | | USB_PORT_STAT_C_RESET) << 16) | |
1da177e4 LT |
1542 | |
1543 | static int dummy_hub_status (struct usb_hcd *hcd, char *buf) | |
1544 | { | |
1545 | struct dummy *dum; | |
1546 | unsigned long flags; | |
391eca9d | 1547 | int retval = 0; |
1da177e4 LT |
1548 | |
1549 | dum = hcd_to_dummy (hcd); | |
1550 | ||
1551 | spin_lock_irqsave (&dum->lock, flags); | |
3cf0a22e | 1552 | if (!test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags)) |
391eca9d | 1553 | goto done; |
f1c39fad AS |
1554 | |
1555 | if (dum->resuming && time_after_eq (jiffies, dum->re_timeout)) { | |
1556 | dum->port_status |= (USB_PORT_STAT_C_SUSPEND << 16); | |
1557 | dum->port_status &= ~USB_PORT_STAT_SUSPEND; | |
1558 | set_link_state (dum); | |
1559 | } | |
1560 | ||
391eca9d | 1561 | if ((dum->port_status & PORT_C_MASK) != 0) { |
1da177e4 LT |
1562 | *buf = (1 << 1); |
1563 | dev_dbg (dummy_dev(dum), "port status 0x%08x has changes\n", | |
391eca9d | 1564 | dum->port_status); |
1da177e4 | 1565 | retval = 1; |
391eca9d AS |
1566 | if (dum->rh_state == DUMMY_RH_SUSPENDED) |
1567 | usb_hcd_resume_root_hub (hcd); | |
1da177e4 | 1568 | } |
391eca9d | 1569 | done: |
1da177e4 LT |
1570 | spin_unlock_irqrestore (&dum->lock, flags); |
1571 | return retval; | |
1572 | } | |
1573 | ||
1574 | static inline void | |
1575 | hub_descriptor (struct usb_hub_descriptor *desc) | |
1576 | { | |
1577 | memset (desc, 0, sizeof *desc); | |
1578 | desc->bDescriptorType = 0x29; | |
1579 | desc->bDescLength = 9; | |
fd05e720 | 1580 | desc->wHubCharacteristics = cpu_to_le16(0x0001); |
1da177e4 LT |
1581 | desc->bNbrPorts = 1; |
1582 | desc->bitmap [0] = 0xff; | |
1583 | desc->bitmap [1] = 0xff; | |
1584 | } | |
1585 | ||
1586 | static int dummy_hub_control ( | |
1587 | struct usb_hcd *hcd, | |
1588 | u16 typeReq, | |
1589 | u16 wValue, | |
1590 | u16 wIndex, | |
1591 | char *buf, | |
1592 | u16 wLength | |
1593 | ) { | |
1594 | struct dummy *dum; | |
1595 | int retval = 0; | |
1596 | unsigned long flags; | |
1597 | ||
3cf0a22e | 1598 | if (!test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags)) |
391eca9d AS |
1599 | return -ETIMEDOUT; |
1600 | ||
1da177e4 LT |
1601 | dum = hcd_to_dummy (hcd); |
1602 | spin_lock_irqsave (&dum->lock, flags); | |
1603 | switch (typeReq) { | |
1604 | case ClearHubFeature: | |
1605 | break; | |
1606 | case ClearPortFeature: | |
1607 | switch (wValue) { | |
1608 | case USB_PORT_FEAT_SUSPEND: | |
c2db8b5e | 1609 | if (dum->port_status & USB_PORT_STAT_SUSPEND) { |
1da177e4 LT |
1610 | /* 20msec resume signaling */ |
1611 | dum->resuming = 1; | |
1612 | dum->re_timeout = jiffies + | |
f1c39fad | 1613 | msecs_to_jiffies(20); |
1da177e4 LT |
1614 | } |
1615 | break; | |
1616 | case USB_PORT_FEAT_POWER: | |
f1c39fad AS |
1617 | if (dum->port_status & USB_PORT_STAT_POWER) |
1618 | dev_dbg (dummy_dev(dum), "power-off\n"); | |
1619 | /* FALLS THROUGH */ | |
1da177e4 LT |
1620 | default: |
1621 | dum->port_status &= ~(1 << wValue); | |
f1c39fad | 1622 | set_link_state (dum); |
1da177e4 LT |
1623 | } |
1624 | break; | |
1625 | case GetHubDescriptor: | |
1626 | hub_descriptor ((struct usb_hub_descriptor *) buf); | |
1627 | break; | |
1628 | case GetHubStatus: | |
cc095b0b | 1629 | *(__le32 *) buf = __constant_cpu_to_le32 (0); |
1da177e4 LT |
1630 | break; |
1631 | case GetPortStatus: | |
1632 | if (wIndex != 1) | |
1633 | retval = -EPIPE; | |
1634 | ||
1635 | /* whoever resets or resumes must GetPortStatus to | |
1636 | * complete it!! | |
1637 | */ | |
f1c39fad AS |
1638 | if (dum->resuming && |
1639 | time_after_eq (jiffies, dum->re_timeout)) { | |
c2db8b5e AS |
1640 | dum->port_status |= (USB_PORT_STAT_C_SUSPEND << 16); |
1641 | dum->port_status &= ~USB_PORT_STAT_SUSPEND; | |
1da177e4 | 1642 | } |
f1c39fad AS |
1643 | if ((dum->port_status & USB_PORT_STAT_RESET) != 0 && |
1644 | time_after_eq (jiffies, dum->re_timeout)) { | |
c2db8b5e AS |
1645 | dum->port_status |= (USB_PORT_STAT_C_RESET << 16); |
1646 | dum->port_status &= ~USB_PORT_STAT_RESET; | |
f1c39fad | 1647 | if (dum->pullup) { |
1da177e4 LT |
1648 | dum->port_status |= USB_PORT_STAT_ENABLE; |
1649 | /* give it the best speed we agree on */ | |
1650 | dum->gadget.speed = dum->driver->speed; | |
1651 | dum->gadget.ep0->maxpacket = 64; | |
1652 | switch (dum->gadget.speed) { | |
1653 | case USB_SPEED_HIGH: | |
1654 | dum->port_status |= | |
1655 | USB_PORT_STAT_HIGH_SPEED; | |
1656 | break; | |
1657 | case USB_SPEED_LOW: | |
1658 | dum->gadget.ep0->maxpacket = 8; | |
1659 | dum->port_status |= | |
1660 | USB_PORT_STAT_LOW_SPEED; | |
1661 | break; | |
1662 | default: | |
1663 | dum->gadget.speed = USB_SPEED_FULL; | |
1664 | break; | |
1665 | } | |
1666 | } | |
1667 | } | |
f1c39fad | 1668 | set_link_state (dum); |
cc095b0b AS |
1669 | ((__le16 *) buf)[0] = cpu_to_le16 (dum->port_status); |
1670 | ((__le16 *) buf)[1] = cpu_to_le16 (dum->port_status >> 16); | |
1da177e4 LT |
1671 | break; |
1672 | case SetHubFeature: | |
1673 | retval = -EPIPE; | |
1674 | break; | |
1675 | case SetPortFeature: | |
1676 | switch (wValue) { | |
1677 | case USB_PORT_FEAT_SUSPEND: | |
f1c39fad | 1678 | if (dum->active) { |
c2db8b5e | 1679 | dum->port_status |= USB_PORT_STAT_SUSPEND; |
f1c39fad AS |
1680 | |
1681 | /* HNP would happen here; for now we | |
1682 | * assume b_bus_req is always true. | |
1683 | */ | |
1684 | set_link_state (dum); | |
1685 | if (((1 << USB_DEVICE_B_HNP_ENABLE) | |
1686 | & dum->devstatus) != 0) | |
1687 | dev_dbg (dummy_dev(dum), | |
5742b0c9 | 1688 | "no HNP yet!\n"); |
1da177e4 LT |
1689 | } |
1690 | break; | |
f1c39fad AS |
1691 | case USB_PORT_FEAT_POWER: |
1692 | dum->port_status |= USB_PORT_STAT_POWER; | |
1693 | set_link_state (dum); | |
1694 | break; | |
1da177e4 | 1695 | case USB_PORT_FEAT_RESET: |
f1c39fad AS |
1696 | /* if it's already enabled, disable */ |
1697 | dum->port_status &= ~(USB_PORT_STAT_ENABLE | |
1698 | | USB_PORT_STAT_LOW_SPEED | |
1699 | | USB_PORT_STAT_HIGH_SPEED); | |
391eca9d | 1700 | dum->devstatus = 0; |
1da177e4 LT |
1701 | /* 50msec reset signaling */ |
1702 | dum->re_timeout = jiffies + msecs_to_jiffies(50); | |
f1c39fad | 1703 | /* FALLS THROUGH */ |
1da177e4 | 1704 | default: |
f1c39fad AS |
1705 | if ((dum->port_status & USB_PORT_STAT_POWER) != 0) { |
1706 | dum->port_status |= (1 << wValue); | |
1707 | set_link_state (dum); | |
1708 | } | |
1da177e4 LT |
1709 | } |
1710 | break; | |
1711 | ||
1712 | default: | |
1713 | dev_dbg (dummy_dev(dum), | |
1714 | "hub control req%04x v%04x i%04x l%d\n", | |
1715 | typeReq, wValue, wIndex, wLength); | |
1716 | ||
1717 | /* "protocol stall" on error */ | |
1718 | retval = -EPIPE; | |
1719 | } | |
1720 | spin_unlock_irqrestore (&dum->lock, flags); | |
685eb93f AS |
1721 | |
1722 | if ((dum->port_status & PORT_C_MASK) != 0) | |
1723 | usb_hcd_poll_rh_status (hcd); | |
1da177e4 LT |
1724 | return retval; |
1725 | } | |
1726 | ||
0c0382e3 | 1727 | static int dummy_bus_suspend (struct usb_hcd *hcd) |
391eca9d AS |
1728 | { |
1729 | struct dummy *dum = hcd_to_dummy (hcd); | |
1730 | ||
441b62c1 | 1731 | dev_dbg (&hcd->self.root_hub->dev, "%s\n", __func__); |
3cf0a22e | 1732 | |
391eca9d AS |
1733 | spin_lock_irq (&dum->lock); |
1734 | dum->rh_state = DUMMY_RH_SUSPENDED; | |
1735 | set_link_state (dum); | |
3cf0a22e | 1736 | hcd->state = HC_STATE_SUSPENDED; |
391eca9d AS |
1737 | spin_unlock_irq (&dum->lock); |
1738 | return 0; | |
1739 | } | |
1740 | ||
0c0382e3 | 1741 | static int dummy_bus_resume (struct usb_hcd *hcd) |
391eca9d AS |
1742 | { |
1743 | struct dummy *dum = hcd_to_dummy (hcd); | |
3cf0a22e AS |
1744 | int rc = 0; |
1745 | ||
441b62c1 | 1746 | dev_dbg (&hcd->self.root_hub->dev, "%s\n", __func__); |
391eca9d AS |
1747 | |
1748 | spin_lock_irq (&dum->lock); | |
3cf0a22e | 1749 | if (!test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags)) { |
cfa59dab | 1750 | rc = -ESHUTDOWN; |
3cf0a22e AS |
1751 | } else { |
1752 | dum->rh_state = DUMMY_RH_RUNNING; | |
1753 | set_link_state (dum); | |
1754 | if (!list_empty(&dum->urbp_list)) | |
1755 | mod_timer (&dum->timer, jiffies); | |
1756 | hcd->state = HC_STATE_RUNNING; | |
1757 | } | |
391eca9d | 1758 | spin_unlock_irq (&dum->lock); |
3cf0a22e | 1759 | return rc; |
391eca9d | 1760 | } |
1da177e4 LT |
1761 | |
1762 | /*-------------------------------------------------------------------------*/ | |
1763 | ||
1764 | static inline ssize_t | |
1765 | show_urb (char *buf, size_t size, struct urb *urb) | |
1766 | { | |
1767 | int ep = usb_pipeendpoint (urb->pipe); | |
1768 | ||
1769 | return snprintf (buf, size, | |
1770 | "urb/%p %s ep%d%s%s len %d/%d\n", | |
1771 | urb, | |
1772 | ({ char *s; | |
1773 | switch (urb->dev->speed) { | |
1774 | case USB_SPEED_LOW: s = "ls"; break; | |
1775 | case USB_SPEED_FULL: s = "fs"; break; | |
1776 | case USB_SPEED_HIGH: s = "hs"; break; | |
1777 | default: s = "?"; break; | |
1778 | }; s; }), | |
1779 | ep, ep ? (usb_pipein (urb->pipe) ? "in" : "out") : "", | |
1780 | ({ char *s; \ | |
1781 | switch (usb_pipetype (urb->pipe)) { \ | |
1782 | case PIPE_CONTROL: s = ""; break; \ | |
1783 | case PIPE_BULK: s = "-bulk"; break; \ | |
1784 | case PIPE_INTERRUPT: s = "-int"; break; \ | |
1785 | default: s = "-iso"; break; \ | |
1786 | }; s;}), | |
1787 | urb->actual_length, urb->transfer_buffer_length); | |
1788 | } | |
1789 | ||
1790 | static ssize_t | |
10523b3b | 1791 | show_urbs (struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
1792 | { |
1793 | struct usb_hcd *hcd = dev_get_drvdata (dev); | |
1794 | struct dummy *dum = hcd_to_dummy (hcd); | |
1795 | struct urbp *urbp; | |
1796 | size_t size = 0; | |
1797 | unsigned long flags; | |
1798 | ||
1799 | spin_lock_irqsave (&dum->lock, flags); | |
1800 | list_for_each_entry (urbp, &dum->urbp_list, urbp_list) { | |
1801 | size_t temp; | |
1802 | ||
1803 | temp = show_urb (buf, PAGE_SIZE - size, urbp->urb); | |
1804 | buf += temp; | |
1805 | size += temp; | |
1806 | } | |
1807 | spin_unlock_irqrestore (&dum->lock, flags); | |
1808 | ||
1809 | return size; | |
1810 | } | |
1811 | static DEVICE_ATTR (urbs, S_IRUGO, show_urbs, NULL); | |
1812 | ||
1813 | static int dummy_start (struct usb_hcd *hcd) | |
1814 | { | |
1815 | struct dummy *dum; | |
1da177e4 LT |
1816 | |
1817 | dum = hcd_to_dummy (hcd); | |
1818 | ||
1819 | /* | |
1820 | * MASTER side init ... we emulate a root hub that'll only ever | |
1821 | * talk to one device (the slave side). Also appears in sysfs, | |
1822 | * just like more familiar pci-based HCDs. | |
1823 | */ | |
1824 | spin_lock_init (&dum->lock); | |
1825 | init_timer (&dum->timer); | |
1826 | dum->timer.function = dummy_timer; | |
1827 | dum->timer.data = (unsigned long) dum; | |
391eca9d | 1828 | dum->rh_state = DUMMY_RH_RUNNING; |
1da177e4 LT |
1829 | |
1830 | INIT_LIST_HEAD (&dum->urbp_list); | |
1831 | ||
caf29f62 | 1832 | hcd->power_budget = POWER_BUDGET; |
1da177e4 | 1833 | hcd->state = HC_STATE_RUNNING; |
685eb93f | 1834 | hcd->uses_new_polling = 1; |
1da177e4 | 1835 | |
5742b0c9 AS |
1836 | #ifdef CONFIG_USB_OTG |
1837 | hcd->self.otg_port = 1; | |
1838 | #endif | |
1839 | ||
1da177e4 | 1840 | /* FIXME 'urbs' should be a per-device thing, maybe in usbcore */ |
efd54a36 | 1841 | return device_create_file (dummy_dev(dum), &dev_attr_urbs); |
1da177e4 LT |
1842 | } |
1843 | ||
1844 | static void dummy_stop (struct usb_hcd *hcd) | |
1845 | { | |
1846 | struct dummy *dum; | |
1847 | ||
1848 | dum = hcd_to_dummy (hcd); | |
1849 | ||
1850 | device_remove_file (dummy_dev(dum), &dev_attr_urbs); | |
1da177e4 | 1851 | usb_gadget_unregister_driver (dum->driver); |
1da177e4 LT |
1852 | dev_info (dummy_dev(dum), "stopped\n"); |
1853 | } | |
1854 | ||
1855 | /*-------------------------------------------------------------------------*/ | |
1856 | ||
1857 | static int dummy_h_get_frame (struct usb_hcd *hcd) | |
1858 | { | |
1859 | return dummy_g_get_frame (NULL); | |
1860 | } | |
1861 | ||
1862 | static const struct hc_driver dummy_hcd = { | |
1863 | .description = (char *) driver_name, | |
1864 | .product_desc = "Dummy host controller", | |
1865 | .hcd_priv_size = sizeof(struct dummy), | |
1866 | ||
1867 | .flags = HCD_USB2, | |
1868 | ||
1869 | .start = dummy_start, | |
1870 | .stop = dummy_stop, | |
1871 | ||
1872 | .urb_enqueue = dummy_urb_enqueue, | |
1873 | .urb_dequeue = dummy_urb_dequeue, | |
1874 | ||
1875 | .get_frame_number = dummy_h_get_frame, | |
1876 | ||
1877 | .hub_status_data = dummy_hub_status, | |
1878 | .hub_control = dummy_hub_control, | |
0c0382e3 AS |
1879 | .bus_suspend = dummy_bus_suspend, |
1880 | .bus_resume = dummy_bus_resume, | |
1da177e4 LT |
1881 | }; |
1882 | ||
8364d6b0 | 1883 | static int dummy_hcd_probe(struct platform_device *pdev) |
1da177e4 LT |
1884 | { |
1885 | struct usb_hcd *hcd; | |
1886 | int retval; | |
1887 | ||
8364d6b0 | 1888 | dev_info(&pdev->dev, "%s, driver " DRIVER_VERSION "\n", driver_desc); |
1da177e4 | 1889 | |
7071a3ce | 1890 | hcd = usb_create_hcd(&dummy_hcd, &pdev->dev, dev_name(&pdev->dev)); |
1da177e4 LT |
1891 | if (!hcd) |
1892 | return -ENOMEM; | |
1893 | the_controller = hcd_to_dummy (hcd); | |
1894 | ||
1895 | retval = usb_add_hcd(hcd, 0, 0); | |
1896 | if (retval != 0) { | |
1897 | usb_put_hcd (hcd); | |
1898 | the_controller = NULL; | |
1899 | } | |
1900 | return retval; | |
1901 | } | |
1902 | ||
8364d6b0 | 1903 | static int dummy_hcd_remove (struct platform_device *pdev) |
1da177e4 LT |
1904 | { |
1905 | struct usb_hcd *hcd; | |
1906 | ||
8364d6b0 | 1907 | hcd = platform_get_drvdata (pdev); |
1da177e4 LT |
1908 | usb_remove_hcd (hcd); |
1909 | usb_put_hcd (hcd); | |
1910 | the_controller = NULL; | |
d9b76251 | 1911 | return 0; |
1da177e4 LT |
1912 | } |
1913 | ||
8364d6b0 | 1914 | static int dummy_hcd_suspend (struct platform_device *pdev, pm_message_t state) |
391eca9d AS |
1915 | { |
1916 | struct usb_hcd *hcd; | |
3cf0a22e AS |
1917 | struct dummy *dum; |
1918 | int rc = 0; | |
391eca9d | 1919 | |
441b62c1 | 1920 | dev_dbg (&pdev->dev, "%s\n", __func__); |
391eca9d | 1921 | |
3cf0a22e AS |
1922 | hcd = platform_get_drvdata (pdev); |
1923 | dum = hcd_to_dummy (hcd); | |
1924 | if (dum->rh_state == DUMMY_RH_RUNNING) { | |
1925 | dev_warn(&pdev->dev, "Root hub isn't suspended!\n"); | |
1926 | rc = -EBUSY; | |
1927 | } else | |
1928 | clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags); | |
1929 | return rc; | |
391eca9d AS |
1930 | } |
1931 | ||
8364d6b0 | 1932 | static int dummy_hcd_resume (struct platform_device *pdev) |
391eca9d AS |
1933 | { |
1934 | struct usb_hcd *hcd; | |
1935 | ||
441b62c1 | 1936 | dev_dbg (&pdev->dev, "%s\n", __func__); |
391eca9d | 1937 | |
3cf0a22e AS |
1938 | hcd = platform_get_drvdata (pdev); |
1939 | set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags); | |
391eca9d AS |
1940 | usb_hcd_poll_rh_status (hcd); |
1941 | return 0; | |
1942 | } | |
1943 | ||
3ae5eaec | 1944 | static struct platform_driver dummy_hcd_driver = { |
d9b76251 AS |
1945 | .probe = dummy_hcd_probe, |
1946 | .remove = dummy_hcd_remove, | |
391eca9d AS |
1947 | .suspend = dummy_hcd_suspend, |
1948 | .resume = dummy_hcd_resume, | |
3ae5eaec RK |
1949 | .driver = { |
1950 | .name = (char *) driver_name, | |
1951 | .owner = THIS_MODULE, | |
1952 | }, | |
d9b76251 | 1953 | }; |
1da177e4 | 1954 | |
d9b76251 | 1955 | /*-------------------------------------------------------------------------*/ |
1da177e4 | 1956 | |
a89a2cd3 AS |
1957 | static struct platform_device *the_udc_pdev; |
1958 | static struct platform_device *the_hcd_pdev; | |
1da177e4 LT |
1959 | |
1960 | static int __init init (void) | |
1961 | { | |
a89a2cd3 | 1962 | int retval = -ENOMEM; |
1da177e4 LT |
1963 | |
1964 | if (usb_disabled ()) | |
1965 | return -ENODEV; | |
d9b76251 | 1966 | |
a89a2cd3 AS |
1967 | the_hcd_pdev = platform_device_alloc(driver_name, -1); |
1968 | if (!the_hcd_pdev) | |
1da177e4 | 1969 | return retval; |
a89a2cd3 AS |
1970 | the_udc_pdev = platform_device_alloc(gadget_name, -1); |
1971 | if (!the_udc_pdev) | |
1972 | goto err_alloc_udc; | |
d9b76251 | 1973 | |
a89a2cd3 AS |
1974 | retval = platform_driver_register(&dummy_hcd_driver); |
1975 | if (retval < 0) | |
1976 | goto err_register_hcd_driver; | |
1977 | retval = platform_driver_register(&dummy_udc_driver); | |
d9b76251 AS |
1978 | if (retval < 0) |
1979 | goto err_register_udc_driver; | |
1980 | ||
a89a2cd3 | 1981 | retval = platform_device_add(the_hcd_pdev); |
d9b76251 | 1982 | if (retval < 0) |
a89a2cd3 AS |
1983 | goto err_add_hcd; |
1984 | retval = platform_device_add(the_udc_pdev); | |
d9b76251 | 1985 | if (retval < 0) |
a89a2cd3 | 1986 | goto err_add_udc; |
d9b76251 AS |
1987 | return retval; |
1988 | ||
a89a2cd3 AS |
1989 | err_add_udc: |
1990 | platform_device_del(the_hcd_pdev); | |
1991 | err_add_hcd: | |
1992 | platform_driver_unregister(&dummy_udc_driver); | |
d9b76251 | 1993 | err_register_udc_driver: |
a89a2cd3 AS |
1994 | platform_driver_unregister(&dummy_hcd_driver); |
1995 | err_register_hcd_driver: | |
1996 | platform_device_put(the_udc_pdev); | |
1997 | err_alloc_udc: | |
1998 | platform_device_put(the_hcd_pdev); | |
1da177e4 LT |
1999 | return retval; |
2000 | } | |
2001 | module_init (init); | |
2002 | ||
2003 | static void __exit cleanup (void) | |
2004 | { | |
a89a2cd3 AS |
2005 | platform_device_unregister(the_udc_pdev); |
2006 | platform_device_unregister(the_hcd_pdev); | |
2007 | platform_driver_unregister(&dummy_udc_driver); | |
2008 | platform_driver_unregister(&dummy_hcd_driver); | |
1da177e4 LT |
2009 | } |
2010 | module_exit (cleanup); |