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 | ||
37 | #define DEBUG | |
38 | ||
39 | #include <linux/config.h> | |
40 | #include <linux/module.h> | |
41 | #include <linux/kernel.h> | |
42 | #include <linux/delay.h> | |
43 | #include <linux/ioport.h> | |
44 | #include <linux/sched.h> | |
45 | #include <linux/slab.h> | |
46 | #include <linux/smp_lock.h> | |
47 | #include <linux/errno.h> | |
48 | #include <linux/init.h> | |
49 | #include <linux/timer.h> | |
50 | #include <linux/list.h> | |
51 | #include <linux/interrupt.h> | |
52 | #include <linux/version.h> | |
53 | ||
54 | #include <linux/usb.h> | |
55 | #include <linux/usb_gadget.h> | |
56 | ||
57 | #include <asm/byteorder.h> | |
58 | #include <asm/io.h> | |
59 | #include <asm/irq.h> | |
60 | #include <asm/system.h> | |
61 | #include <asm/unaligned.h> | |
62 | ||
63 | ||
64 | #include "../core/hcd.h" | |
65 | ||
66 | ||
67 | #define DRIVER_DESC "USB Host+Gadget Emulator" | |
391eca9d | 68 | #define DRIVER_VERSION "02 May 2005" |
1da177e4 LT |
69 | |
70 | static const char driver_name [] = "dummy_hcd"; | |
71 | static const char driver_desc [] = "USB Host+Gadget Emulator"; | |
72 | ||
73 | static const char gadget_name [] = "dummy_udc"; | |
74 | ||
75 | MODULE_DESCRIPTION (DRIVER_DESC); | |
76 | MODULE_AUTHOR ("David Brownell"); | |
77 | MODULE_LICENSE ("GPL"); | |
78 | ||
79 | /*-------------------------------------------------------------------------*/ | |
80 | ||
81 | /* gadget side driver data structres */ | |
82 | struct dummy_ep { | |
83 | struct list_head queue; | |
84 | unsigned long last_io; /* jiffies timestamp */ | |
85 | struct usb_gadget *gadget; | |
86 | const struct usb_endpoint_descriptor *desc; | |
87 | struct usb_ep ep; | |
88 | unsigned halted : 1; | |
89 | unsigned already_seen : 1; | |
90 | unsigned setup_stage : 1; | |
91 | }; | |
92 | ||
93 | struct dummy_request { | |
94 | struct list_head queue; /* ep's requests */ | |
95 | struct usb_request req; | |
96 | }; | |
97 | ||
98 | static inline struct dummy_ep *usb_ep_to_dummy_ep (struct usb_ep *_ep) | |
99 | { | |
100 | return container_of (_ep, struct dummy_ep, ep); | |
101 | } | |
102 | ||
103 | static inline struct dummy_request *usb_request_to_dummy_request | |
104 | (struct usb_request *_req) | |
105 | { | |
106 | return container_of (_req, struct dummy_request, req); | |
107 | } | |
108 | ||
109 | /*-------------------------------------------------------------------------*/ | |
110 | ||
111 | /* | |
112 | * Every device has ep0 for control requests, plus up to 30 more endpoints, | |
113 | * in one of two types: | |
114 | * | |
115 | * - Configurable: direction (in/out), type (bulk, iso, etc), and endpoint | |
116 | * number can be changed. Names like "ep-a" are used for this type. | |
117 | * | |
118 | * - Fixed Function: in other cases. some characteristics may be mutable; | |
119 | * that'd be hardware-specific. Names like "ep12out-bulk" are used. | |
120 | * | |
121 | * Gadget drivers are responsible for not setting up conflicting endpoint | |
122 | * configurations, illegal or unsupported packet lengths, and so on. | |
123 | */ | |
124 | ||
125 | static const char ep0name [] = "ep0"; | |
126 | ||
127 | static const char *const ep_name [] = { | |
128 | ep0name, /* everyone has ep0 */ | |
129 | ||
130 | /* act like a net2280: high speed, six configurable endpoints */ | |
131 | "ep-a", "ep-b", "ep-c", "ep-d", "ep-e", "ep-f", | |
132 | ||
133 | /* or like pxa250: fifteen fixed function endpoints */ | |
134 | "ep1in-bulk", "ep2out-bulk", "ep3in-iso", "ep4out-iso", "ep5in-int", | |
135 | "ep6in-bulk", "ep7out-bulk", "ep8in-iso", "ep9out-iso", "ep10in-int", | |
136 | "ep11in-bulk", "ep12out-bulk", "ep13in-iso", "ep14out-iso", | |
137 | "ep15in-int", | |
138 | ||
139 | /* or like sa1100: two fixed function endpoints */ | |
140 | "ep1out-bulk", "ep2in-bulk", | |
141 | }; | |
142 | #define DUMMY_ENDPOINTS (sizeof(ep_name)/sizeof(char *)) | |
143 | ||
d9b76251 AS |
144 | /*-------------------------------------------------------------------------*/ |
145 | ||
1da177e4 LT |
146 | #define FIFO_SIZE 64 |
147 | ||
148 | struct urbp { | |
149 | struct urb *urb; | |
150 | struct list_head urbp_list; | |
151 | }; | |
152 | ||
391eca9d AS |
153 | |
154 | enum dummy_rh_state { | |
155 | DUMMY_RH_RESET, | |
156 | DUMMY_RH_SUSPENDED, | |
157 | DUMMY_RH_RUNNING | |
158 | }; | |
159 | ||
1da177e4 LT |
160 | struct dummy { |
161 | spinlock_t lock; | |
162 | ||
163 | /* | |
164 | * SLAVE/GADGET side support | |
165 | */ | |
166 | struct dummy_ep ep [DUMMY_ENDPOINTS]; | |
167 | int address; | |
168 | struct usb_gadget gadget; | |
169 | struct usb_gadget_driver *driver; | |
170 | struct dummy_request fifo_req; | |
171 | u8 fifo_buf [FIFO_SIZE]; | |
172 | u16 devstatus; | |
391eca9d | 173 | unsigned udc_suspended:1; |
f1c39fad AS |
174 | unsigned pullup:1; |
175 | unsigned active:1; | |
176 | unsigned old_active:1; | |
1da177e4 LT |
177 | |
178 | /* | |
179 | * MASTER/HOST side support | |
180 | */ | |
391eca9d | 181 | enum dummy_rh_state rh_state; |
1da177e4 LT |
182 | struct timer_list timer; |
183 | u32 port_status; | |
f1c39fad | 184 | u32 old_status; |
1da177e4 LT |
185 | unsigned resuming:1; |
186 | unsigned long re_timeout; | |
187 | ||
188 | struct usb_device *udev; | |
189 | struct list_head urbp_list; | |
190 | }; | |
191 | ||
192 | static inline struct dummy *hcd_to_dummy (struct usb_hcd *hcd) | |
193 | { | |
194 | return (struct dummy *) (hcd->hcd_priv); | |
195 | } | |
196 | ||
197 | static inline struct usb_hcd *dummy_to_hcd (struct dummy *dum) | |
198 | { | |
199 | return container_of((void *) dum, struct usb_hcd, hcd_priv); | |
200 | } | |
201 | ||
202 | static inline struct device *dummy_dev (struct dummy *dum) | |
203 | { | |
204 | return dummy_to_hcd(dum)->self.controller; | |
205 | } | |
206 | ||
d9b76251 AS |
207 | static inline struct device *udc_dev (struct dummy *dum) |
208 | { | |
209 | return dum->gadget.dev.parent; | |
210 | } | |
211 | ||
1da177e4 LT |
212 | static inline struct dummy *ep_to_dummy (struct dummy_ep *ep) |
213 | { | |
214 | return container_of (ep->gadget, struct dummy, gadget); | |
215 | } | |
216 | ||
217 | static inline struct dummy *gadget_to_dummy (struct usb_gadget *gadget) | |
218 | { | |
219 | return container_of (gadget, struct dummy, gadget); | |
220 | } | |
221 | ||
222 | static inline struct dummy *gadget_dev_to_dummy (struct device *dev) | |
223 | { | |
224 | return container_of (dev, struct dummy, gadget.dev); | |
225 | } | |
226 | ||
227 | static struct dummy *the_controller; | |
228 | ||
229 | /*-------------------------------------------------------------------------*/ | |
230 | ||
f1c39fad AS |
231 | /* SLAVE/GADGET SIDE UTILITY ROUTINES */ |
232 | ||
233 | /* called with spinlock held */ | |
234 | static void nuke (struct dummy *dum, struct dummy_ep *ep) | |
235 | { | |
236 | while (!list_empty (&ep->queue)) { | |
237 | struct dummy_request *req; | |
238 | ||
239 | req = list_entry (ep->queue.next, struct dummy_request, queue); | |
240 | list_del_init (&req->queue); | |
241 | req->req.status = -ESHUTDOWN; | |
242 | ||
243 | spin_unlock (&dum->lock); | |
244 | req->req.complete (&ep->ep, &req->req); | |
245 | spin_lock (&dum->lock); | |
246 | } | |
247 | } | |
248 | ||
249 | /* caller must hold lock */ | |
250 | static void | |
251 | stop_activity (struct dummy *dum) | |
252 | { | |
253 | struct dummy_ep *ep; | |
254 | ||
255 | /* prevent any more requests */ | |
256 | dum->address = 0; | |
257 | ||
258 | /* The timer is left running so that outstanding URBs can fail */ | |
259 | ||
260 | /* nuke any pending requests first, so driver i/o is quiesced */ | |
261 | list_for_each_entry (ep, &dum->gadget.ep_list, ep.ep_list) | |
262 | nuke (dum, ep); | |
263 | ||
264 | /* driver now does any non-usb quiescing necessary */ | |
265 | } | |
266 | ||
267 | /* caller must hold lock */ | |
268 | static void | |
269 | set_link_state (struct dummy *dum) | |
270 | { | |
271 | dum->active = 0; | |
272 | if ((dum->port_status & USB_PORT_STAT_POWER) == 0) | |
273 | dum->port_status = 0; | |
391eca9d AS |
274 | |
275 | /* UDC suspend must cause a disconnect */ | |
276 | else if (!dum->pullup || dum->udc_suspended) { | |
f1c39fad AS |
277 | dum->port_status &= ~(USB_PORT_STAT_CONNECTION | |
278 | USB_PORT_STAT_ENABLE | | |
279 | USB_PORT_STAT_LOW_SPEED | | |
280 | USB_PORT_STAT_HIGH_SPEED | | |
281 | USB_PORT_STAT_SUSPEND); | |
282 | if ((dum->old_status & USB_PORT_STAT_CONNECTION) != 0) | |
283 | dum->port_status |= (USB_PORT_STAT_C_CONNECTION << 16); | |
284 | } else { | |
285 | dum->port_status |= USB_PORT_STAT_CONNECTION; | |
286 | if ((dum->old_status & USB_PORT_STAT_CONNECTION) == 0) | |
287 | dum->port_status |= (USB_PORT_STAT_C_CONNECTION << 16); | |
288 | if ((dum->port_status & USB_PORT_STAT_ENABLE) == 0) | |
289 | dum->port_status &= ~USB_PORT_STAT_SUSPEND; | |
391eca9d AS |
290 | else if ((dum->port_status & USB_PORT_STAT_SUSPEND) == 0 && |
291 | dum->rh_state != DUMMY_RH_SUSPENDED) | |
f1c39fad AS |
292 | dum->active = 1; |
293 | } | |
294 | ||
295 | if ((dum->port_status & USB_PORT_STAT_ENABLE) == 0 || dum->active) | |
296 | dum->resuming = 0; | |
297 | ||
298 | if ((dum->port_status & USB_PORT_STAT_CONNECTION) == 0 || | |
299 | (dum->port_status & USB_PORT_STAT_RESET) != 0) { | |
300 | if ((dum->old_status & USB_PORT_STAT_CONNECTION) != 0 && | |
301 | (dum->old_status & USB_PORT_STAT_RESET) == 0 && | |
302 | dum->driver) { | |
303 | stop_activity (dum); | |
304 | spin_unlock (&dum->lock); | |
305 | dum->driver->disconnect (&dum->gadget); | |
306 | spin_lock (&dum->lock); | |
307 | } | |
308 | } else if (dum->active != dum->old_active) { | |
309 | if (dum->old_active && dum->driver->suspend) { | |
310 | spin_unlock (&dum->lock); | |
311 | dum->driver->suspend (&dum->gadget); | |
312 | spin_lock (&dum->lock); | |
313 | } else if (!dum->old_active && dum->driver->resume) { | |
314 | spin_unlock (&dum->lock); | |
315 | dum->driver->resume (&dum->gadget); | |
316 | spin_lock (&dum->lock); | |
317 | } | |
318 | } | |
319 | ||
320 | dum->old_status = dum->port_status; | |
321 | dum->old_active = dum->active; | |
322 | } | |
323 | ||
324 | /*-------------------------------------------------------------------------*/ | |
325 | ||
1da177e4 LT |
326 | /* SLAVE/GADGET SIDE DRIVER |
327 | * | |
328 | * This only tracks gadget state. All the work is done when the host | |
329 | * side tries some (emulated) i/o operation. Real device controller | |
330 | * drivers would do real i/o using dma, fifos, irqs, timers, etc. | |
331 | */ | |
332 | ||
333 | #define is_enabled(dum) \ | |
334 | (dum->port_status & USB_PORT_STAT_ENABLE) | |
335 | ||
336 | static int | |
337 | dummy_enable (struct usb_ep *_ep, const struct usb_endpoint_descriptor *desc) | |
338 | { | |
339 | struct dummy *dum; | |
340 | struct dummy_ep *ep; | |
341 | unsigned max; | |
342 | int retval; | |
343 | ||
344 | ep = usb_ep_to_dummy_ep (_ep); | |
345 | if (!_ep || !desc || ep->desc || _ep->name == ep0name | |
346 | || desc->bDescriptorType != USB_DT_ENDPOINT) | |
347 | return -EINVAL; | |
348 | dum = ep_to_dummy (ep); | |
349 | if (!dum->driver || !is_enabled (dum)) | |
350 | return -ESHUTDOWN; | |
351 | max = le16_to_cpu(desc->wMaxPacketSize) & 0x3ff; | |
352 | ||
353 | /* drivers must not request bad settings, since lower levels | |
354 | * (hardware or its drivers) may not check. some endpoints | |
355 | * can't do iso, many have maxpacket limitations, etc. | |
356 | * | |
357 | * since this "hardware" driver is here to help debugging, we | |
358 | * have some extra sanity checks. (there could be more though, | |
359 | * especially for "ep9out" style fixed function ones.) | |
360 | */ | |
361 | retval = -EINVAL; | |
362 | switch (desc->bmAttributes & 0x03) { | |
363 | case USB_ENDPOINT_XFER_BULK: | |
364 | if (strstr (ep->ep.name, "-iso") | |
365 | || strstr (ep->ep.name, "-int")) { | |
366 | goto done; | |
367 | } | |
368 | switch (dum->gadget.speed) { | |
369 | case USB_SPEED_HIGH: | |
370 | if (max == 512) | |
371 | break; | |
372 | /* conserve return statements */ | |
373 | default: | |
374 | switch (max) { | |
375 | case 8: case 16: case 32: case 64: | |
376 | /* we'll fake any legal size */ | |
377 | break; | |
378 | default: | |
379 | case USB_SPEED_LOW: | |
380 | goto done; | |
381 | } | |
382 | } | |
383 | break; | |
384 | case USB_ENDPOINT_XFER_INT: | |
385 | if (strstr (ep->ep.name, "-iso")) /* bulk is ok */ | |
386 | goto done; | |
387 | /* real hardware might not handle all packet sizes */ | |
388 | switch (dum->gadget.speed) { | |
389 | case USB_SPEED_HIGH: | |
390 | if (max <= 1024) | |
391 | break; | |
392 | /* save a return statement */ | |
393 | case USB_SPEED_FULL: | |
394 | if (max <= 64) | |
395 | break; | |
396 | /* save a return statement */ | |
397 | default: | |
398 | if (max <= 8) | |
399 | break; | |
400 | goto done; | |
401 | } | |
402 | break; | |
403 | case USB_ENDPOINT_XFER_ISOC: | |
404 | if (strstr (ep->ep.name, "-bulk") | |
405 | || strstr (ep->ep.name, "-int")) | |
406 | goto done; | |
407 | /* real hardware might not handle all packet sizes */ | |
408 | switch (dum->gadget.speed) { | |
409 | case USB_SPEED_HIGH: | |
410 | if (max <= 1024) | |
411 | break; | |
412 | /* save a return statement */ | |
413 | case USB_SPEED_FULL: | |
414 | if (max <= 1023) | |
415 | break; | |
416 | /* save a return statement */ | |
417 | default: | |
418 | goto done; | |
419 | } | |
420 | break; | |
421 | default: | |
422 | /* few chips support control except on ep0 */ | |
423 | goto done; | |
424 | } | |
425 | ||
426 | _ep->maxpacket = max; | |
427 | ep->desc = desc; | |
428 | ||
d9b76251 | 429 | dev_dbg (udc_dev(dum), "enabled %s (ep%d%s-%s) maxpacket %d\n", |
1da177e4 LT |
430 | _ep->name, |
431 | desc->bEndpointAddress & 0x0f, | |
432 | (desc->bEndpointAddress & USB_DIR_IN) ? "in" : "out", | |
433 | ({ char *val; | |
434 | switch (desc->bmAttributes & 0x03) { | |
435 | case USB_ENDPOINT_XFER_BULK: val = "bulk"; break; | |
436 | case USB_ENDPOINT_XFER_ISOC: val = "iso"; break; | |
437 | case USB_ENDPOINT_XFER_INT: val = "intr"; break; | |
438 | default: val = "ctrl"; break; | |
439 | }; val; }), | |
440 | max); | |
441 | ||
442 | /* at this point real hardware should be NAKing transfers | |
443 | * to that endpoint, until a buffer is queued to it. | |
444 | */ | |
445 | retval = 0; | |
446 | done: | |
447 | return retval; | |
448 | } | |
449 | ||
1da177e4 LT |
450 | static int dummy_disable (struct usb_ep *_ep) |
451 | { | |
452 | struct dummy_ep *ep; | |
453 | struct dummy *dum; | |
454 | unsigned long flags; | |
455 | int retval; | |
456 | ||
457 | ep = usb_ep_to_dummy_ep (_ep); | |
458 | if (!_ep || !ep->desc || _ep->name == ep0name) | |
459 | return -EINVAL; | |
460 | dum = ep_to_dummy (ep); | |
461 | ||
462 | spin_lock_irqsave (&dum->lock, flags); | |
463 | ep->desc = NULL; | |
464 | retval = 0; | |
465 | nuke (dum, ep); | |
466 | spin_unlock_irqrestore (&dum->lock, flags); | |
467 | ||
d9b76251 | 468 | dev_dbg (udc_dev(dum), "disabled %s\n", _ep->name); |
1da177e4 LT |
469 | return retval; |
470 | } | |
471 | ||
472 | static struct usb_request * | |
55016f10 | 473 | dummy_alloc_request (struct usb_ep *_ep, gfp_t mem_flags) |
1da177e4 LT |
474 | { |
475 | struct dummy_ep *ep; | |
476 | struct dummy_request *req; | |
477 | ||
478 | if (!_ep) | |
479 | return NULL; | |
480 | ep = usb_ep_to_dummy_ep (_ep); | |
481 | ||
482 | req = kmalloc (sizeof *req, mem_flags); | |
483 | if (!req) | |
484 | return NULL; | |
485 | memset (req, 0, sizeof *req); | |
486 | INIT_LIST_HEAD (&req->queue); | |
487 | return &req->req; | |
488 | } | |
489 | ||
490 | static void | |
491 | dummy_free_request (struct usb_ep *_ep, struct usb_request *_req) | |
492 | { | |
493 | struct dummy_ep *ep; | |
494 | struct dummy_request *req; | |
495 | ||
496 | ep = usb_ep_to_dummy_ep (_ep); | |
497 | if (!ep || !_req || (!ep->desc && _ep->name != ep0name)) | |
498 | return; | |
499 | ||
500 | req = usb_request_to_dummy_request (_req); | |
501 | WARN_ON (!list_empty (&req->queue)); | |
502 | kfree (req); | |
503 | } | |
504 | ||
505 | static void * | |
506 | dummy_alloc_buffer ( | |
507 | struct usb_ep *_ep, | |
508 | unsigned bytes, | |
509 | dma_addr_t *dma, | |
55016f10 | 510 | gfp_t mem_flags |
1da177e4 LT |
511 | ) { |
512 | char *retval; | |
513 | struct dummy_ep *ep; | |
514 | struct dummy *dum; | |
515 | ||
516 | ep = usb_ep_to_dummy_ep (_ep); | |
517 | dum = ep_to_dummy (ep); | |
518 | ||
519 | if (!dum->driver) | |
520 | return NULL; | |
521 | retval = kmalloc (bytes, mem_flags); | |
522 | *dma = (dma_addr_t) retval; | |
523 | return retval; | |
524 | } | |
525 | ||
526 | static void | |
527 | dummy_free_buffer ( | |
528 | struct usb_ep *_ep, | |
529 | void *buf, | |
530 | dma_addr_t dma, | |
531 | unsigned bytes | |
532 | ) { | |
533 | if (bytes) | |
534 | kfree (buf); | |
535 | } | |
536 | ||
537 | static void | |
538 | fifo_complete (struct usb_ep *ep, struct usb_request *req) | |
539 | { | |
540 | } | |
541 | ||
542 | static int | |
5db539e4 | 543 | dummy_queue (struct usb_ep *_ep, struct usb_request *_req, |
55016f10 | 544 | gfp_t mem_flags) |
1da177e4 LT |
545 | { |
546 | struct dummy_ep *ep; | |
547 | struct dummy_request *req; | |
548 | struct dummy *dum; | |
549 | unsigned long flags; | |
550 | ||
551 | req = usb_request_to_dummy_request (_req); | |
552 | if (!_req || !list_empty (&req->queue) || !_req->complete) | |
553 | return -EINVAL; | |
554 | ||
555 | ep = usb_ep_to_dummy_ep (_ep); | |
556 | if (!_ep || (!ep->desc && _ep->name != ep0name)) | |
557 | return -EINVAL; | |
558 | ||
559 | dum = ep_to_dummy (ep); | |
560 | if (!dum->driver || !is_enabled (dum)) | |
561 | return -ESHUTDOWN; | |
562 | ||
563 | #if 0 | |
d9b76251 | 564 | dev_dbg (udc_dev(dum), "ep %p queue req %p to %s, len %d buf %p\n", |
1da177e4 LT |
565 | ep, _req, _ep->name, _req->length, _req->buf); |
566 | #endif | |
567 | ||
568 | _req->status = -EINPROGRESS; | |
569 | _req->actual = 0; | |
570 | spin_lock_irqsave (&dum->lock, flags); | |
571 | ||
572 | /* implement an emulated single-request FIFO */ | |
573 | if (ep->desc && (ep->desc->bEndpointAddress & USB_DIR_IN) && | |
574 | list_empty (&dum->fifo_req.queue) && | |
575 | list_empty (&ep->queue) && | |
576 | _req->length <= FIFO_SIZE) { | |
577 | req = &dum->fifo_req; | |
578 | req->req = *_req; | |
579 | req->req.buf = dum->fifo_buf; | |
580 | memcpy (dum->fifo_buf, _req->buf, _req->length); | |
581 | req->req.context = dum; | |
582 | req->req.complete = fifo_complete; | |
583 | ||
584 | spin_unlock (&dum->lock); | |
585 | _req->actual = _req->length; | |
586 | _req->status = 0; | |
587 | _req->complete (_ep, _req); | |
588 | spin_lock (&dum->lock); | |
589 | } | |
590 | list_add_tail (&req->queue, &ep->queue); | |
591 | spin_unlock_irqrestore (&dum->lock, flags); | |
592 | ||
593 | /* real hardware would likely enable transfers here, in case | |
594 | * it'd been left NAKing. | |
595 | */ | |
596 | return 0; | |
597 | } | |
598 | ||
599 | static int dummy_dequeue (struct usb_ep *_ep, struct usb_request *_req) | |
600 | { | |
601 | struct dummy_ep *ep; | |
602 | struct dummy *dum; | |
603 | int retval = -EINVAL; | |
604 | unsigned long flags; | |
605 | struct dummy_request *req = NULL; | |
606 | ||
607 | if (!_ep || !_req) | |
608 | return retval; | |
609 | ep = usb_ep_to_dummy_ep (_ep); | |
610 | dum = ep_to_dummy (ep); | |
611 | ||
612 | if (!dum->driver) | |
613 | return -ESHUTDOWN; | |
614 | ||
615 | spin_lock_irqsave (&dum->lock, flags); | |
616 | list_for_each_entry (req, &ep->queue, queue) { | |
617 | if (&req->req == _req) { | |
618 | list_del_init (&req->queue); | |
619 | _req->status = -ECONNRESET; | |
620 | retval = 0; | |
621 | break; | |
622 | } | |
623 | } | |
624 | spin_unlock_irqrestore (&dum->lock, flags); | |
625 | ||
626 | if (retval == 0) { | |
d9b76251 | 627 | dev_dbg (udc_dev(dum), |
1da177e4 LT |
628 | "dequeued req %p from %s, len %d buf %p\n", |
629 | req, _ep->name, _req->length, _req->buf); | |
630 | _req->complete (_ep, _req); | |
631 | } | |
632 | return retval; | |
633 | } | |
634 | ||
635 | static int | |
636 | dummy_set_halt (struct usb_ep *_ep, int value) | |
637 | { | |
638 | struct dummy_ep *ep; | |
639 | struct dummy *dum; | |
640 | ||
641 | if (!_ep) | |
642 | return -EINVAL; | |
643 | ep = usb_ep_to_dummy_ep (_ep); | |
644 | dum = ep_to_dummy (ep); | |
645 | if (!dum->driver) | |
646 | return -ESHUTDOWN; | |
647 | if (!value) | |
648 | ep->halted = 0; | |
649 | else if (ep->desc && (ep->desc->bEndpointAddress & USB_DIR_IN) && | |
650 | !list_empty (&ep->queue)) | |
651 | return -EAGAIN; | |
652 | else | |
653 | ep->halted = 1; | |
654 | /* FIXME clear emulated data toggle too */ | |
655 | return 0; | |
656 | } | |
657 | ||
658 | static const struct usb_ep_ops dummy_ep_ops = { | |
659 | .enable = dummy_enable, | |
660 | .disable = dummy_disable, | |
661 | ||
662 | .alloc_request = dummy_alloc_request, | |
663 | .free_request = dummy_free_request, | |
664 | ||
665 | .alloc_buffer = dummy_alloc_buffer, | |
666 | .free_buffer = dummy_free_buffer, | |
667 | /* map, unmap, ... eventually hook the "generic" dma calls */ | |
668 | ||
669 | .queue = dummy_queue, | |
670 | .dequeue = dummy_dequeue, | |
671 | ||
672 | .set_halt = dummy_set_halt, | |
673 | }; | |
674 | ||
675 | /*-------------------------------------------------------------------------*/ | |
676 | ||
677 | /* there are both host and device side versions of this call ... */ | |
678 | static int dummy_g_get_frame (struct usb_gadget *_gadget) | |
679 | { | |
680 | struct timeval tv; | |
681 | ||
682 | do_gettimeofday (&tv); | |
683 | return tv.tv_usec / 1000; | |
684 | } | |
685 | ||
686 | static int dummy_wakeup (struct usb_gadget *_gadget) | |
687 | { | |
688 | struct dummy *dum; | |
689 | ||
690 | dum = gadget_to_dummy (_gadget); | |
391eca9d | 691 | if (!(dum->devstatus & ( (1 << USB_DEVICE_B_HNP_ENABLE) |
5742b0c9 | 692 | | (1 << USB_DEVICE_REMOTE_WAKEUP)))) |
1da177e4 | 693 | return -EINVAL; |
391eca9d AS |
694 | if ((dum->port_status & USB_PORT_STAT_CONNECTION) == 0) |
695 | return -ENOLINK; | |
696 | if ((dum->port_status & USB_PORT_STAT_SUSPEND) == 0 && | |
697 | dum->rh_state != DUMMY_RH_SUSPENDED) | |
698 | return -EIO; | |
699 | ||
700 | /* FIXME: What if the root hub is suspended but the port isn't? */ | |
1da177e4 LT |
701 | |
702 | /* hub notices our request, issues downstream resume, etc */ | |
703 | dum->resuming = 1; | |
f1c39fad | 704 | dum->re_timeout = jiffies + msecs_to_jiffies(20); |
685eb93f | 705 | mod_timer (&dummy_to_hcd (dum)->rh_timer, dum->re_timeout); |
1da177e4 LT |
706 | return 0; |
707 | } | |
708 | ||
709 | static int dummy_set_selfpowered (struct usb_gadget *_gadget, int value) | |
710 | { | |
711 | struct dummy *dum; | |
712 | ||
713 | dum = gadget_to_dummy (_gadget); | |
714 | if (value) | |
715 | dum->devstatus |= (1 << USB_DEVICE_SELF_POWERED); | |
716 | else | |
717 | dum->devstatus &= ~(1 << USB_DEVICE_SELF_POWERED); | |
718 | return 0; | |
719 | } | |
720 | ||
f1c39fad AS |
721 | static int dummy_pullup (struct usb_gadget *_gadget, int value) |
722 | { | |
723 | struct dummy *dum; | |
724 | unsigned long flags; | |
725 | ||
726 | dum = gadget_to_dummy (_gadget); | |
727 | spin_lock_irqsave (&dum->lock, flags); | |
728 | dum->pullup = (value != 0); | |
729 | set_link_state (dum); | |
730 | spin_unlock_irqrestore (&dum->lock, flags); | |
685eb93f AS |
731 | |
732 | usb_hcd_poll_rh_status (dummy_to_hcd (dum)); | |
f1c39fad AS |
733 | return 0; |
734 | } | |
735 | ||
1da177e4 LT |
736 | static const struct usb_gadget_ops dummy_ops = { |
737 | .get_frame = dummy_g_get_frame, | |
738 | .wakeup = dummy_wakeup, | |
739 | .set_selfpowered = dummy_set_selfpowered, | |
f1c39fad | 740 | .pullup = dummy_pullup, |
1da177e4 LT |
741 | }; |
742 | ||
743 | /*-------------------------------------------------------------------------*/ | |
744 | ||
745 | /* "function" sysfs attribute */ | |
746 | static ssize_t | |
10523b3b | 747 | show_function (struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
748 | { |
749 | struct dummy *dum = gadget_dev_to_dummy (dev); | |
750 | ||
751 | if (!dum->driver || !dum->driver->function) | |
752 | return 0; | |
753 | return scnprintf (buf, PAGE_SIZE, "%s\n", dum->driver->function); | |
754 | } | |
cc095b0b | 755 | static DEVICE_ATTR (function, S_IRUGO, show_function, NULL); |
1da177e4 LT |
756 | |
757 | /*-------------------------------------------------------------------------*/ | |
758 | ||
759 | /* | |
760 | * Driver registration/unregistration. | |
761 | * | |
762 | * This is basically hardware-specific; there's usually only one real USB | |
763 | * device (not host) controller since that's how USB devices are intended | |
764 | * to work. So most implementations of these api calls will rely on the | |
765 | * fact that only one driver will ever bind to the hardware. But curious | |
766 | * hardware can be built with discrete components, so the gadget API doesn't | |
767 | * require that assumption. | |
768 | * | |
769 | * For this emulator, it might be convenient to create a usb slave device | |
770 | * for each driver that registers: just add to a big root hub. | |
771 | */ | |
772 | ||
1da177e4 LT |
773 | int |
774 | usb_gadget_register_driver (struct usb_gadget_driver *driver) | |
775 | { | |
776 | struct dummy *dum = the_controller; | |
777 | int retval, i; | |
778 | ||
779 | if (!dum) | |
780 | return -EINVAL; | |
781 | if (dum->driver) | |
782 | return -EBUSY; | |
783 | if (!driver->bind || !driver->unbind || !driver->setup | |
784 | || driver->speed == USB_SPEED_UNKNOWN) | |
785 | return -EINVAL; | |
786 | ||
787 | /* | |
788 | * SLAVE side init ... the layer above hardware, which | |
789 | * can't enumerate without help from the driver we're binding. | |
790 | */ | |
5742b0c9 | 791 | |
1da177e4 | 792 | dum->devstatus = 0; |
1da177e4 LT |
793 | |
794 | INIT_LIST_HEAD (&dum->gadget.ep_list); | |
795 | for (i = 0; i < DUMMY_ENDPOINTS; i++) { | |
796 | struct dummy_ep *ep = &dum->ep [i]; | |
797 | ||
798 | if (!ep_name [i]) | |
799 | break; | |
800 | ep->ep.name = ep_name [i]; | |
801 | ep->ep.ops = &dummy_ep_ops; | |
802 | list_add_tail (&ep->ep.ep_list, &dum->gadget.ep_list); | |
803 | ep->halted = ep->already_seen = ep->setup_stage = 0; | |
804 | ep->ep.maxpacket = ~0; | |
805 | ep->last_io = jiffies; | |
806 | ep->gadget = &dum->gadget; | |
807 | ep->desc = NULL; | |
808 | INIT_LIST_HEAD (&ep->queue); | |
809 | } | |
810 | ||
811 | dum->gadget.ep0 = &dum->ep [0].ep; | |
812 | dum->ep [0].ep.maxpacket = 64; | |
813 | list_del_init (&dum->ep [0].ep.ep_list); | |
814 | INIT_LIST_HEAD(&dum->fifo_req.queue); | |
815 | ||
816 | dum->driver = driver; | |
817 | dum->gadget.dev.driver = &driver->driver; | |
d9b76251 | 818 | dev_dbg (udc_dev(dum), "binding gadget driver '%s'\n", |
1da177e4 LT |
819 | driver->driver.name); |
820 | if ((retval = driver->bind (&dum->gadget)) != 0) { | |
821 | dum->driver = NULL; | |
822 | dum->gadget.dev.driver = NULL; | |
823 | return retval; | |
824 | } | |
825 | ||
1da177e4 LT |
826 | driver->driver.bus = dum->gadget.dev.parent->bus; |
827 | driver_register (&driver->driver); | |
1da177e4 LT |
828 | device_bind_driver (&dum->gadget.dev); |
829 | ||
830 | /* khubd will enumerate this in a while */ | |
f1c39fad AS |
831 | spin_lock_irq (&dum->lock); |
832 | dum->pullup = 1; | |
833 | set_link_state (dum); | |
834 | spin_unlock_irq (&dum->lock); | |
685eb93f AS |
835 | |
836 | usb_hcd_poll_rh_status (dummy_to_hcd (dum)); | |
1da177e4 LT |
837 | return 0; |
838 | } | |
839 | EXPORT_SYMBOL (usb_gadget_register_driver); | |
840 | ||
1da177e4 LT |
841 | int |
842 | usb_gadget_unregister_driver (struct usb_gadget_driver *driver) | |
843 | { | |
844 | struct dummy *dum = the_controller; | |
845 | unsigned long flags; | |
846 | ||
847 | if (!dum) | |
848 | return -ENODEV; | |
849 | if (!driver || driver != dum->driver) | |
850 | return -EINVAL; | |
851 | ||
d9b76251 | 852 | dev_dbg (udc_dev(dum), "unregister gadget driver '%s'\n", |
1da177e4 LT |
853 | driver->driver.name); |
854 | ||
855 | spin_lock_irqsave (&dum->lock, flags); | |
f1c39fad AS |
856 | dum->pullup = 0; |
857 | set_link_state (dum); | |
1da177e4 LT |
858 | spin_unlock_irqrestore (&dum->lock, flags); |
859 | ||
860 | driver->unbind (&dum->gadget); | |
861 | dum->driver = NULL; | |
862 | ||
863 | device_release_driver (&dum->gadget.dev); | |
1da177e4 LT |
864 | driver_unregister (&driver->driver); |
865 | ||
f1c39fad AS |
866 | spin_lock_irqsave (&dum->lock, flags); |
867 | dum->pullup = 0; | |
868 | set_link_state (dum); | |
869 | spin_unlock_irqrestore (&dum->lock, flags); | |
870 | ||
685eb93f | 871 | usb_hcd_poll_rh_status (dummy_to_hcd (dum)); |
1da177e4 LT |
872 | return 0; |
873 | } | |
874 | EXPORT_SYMBOL (usb_gadget_unregister_driver); | |
875 | ||
876 | #undef is_enabled | |
877 | ||
cc095b0b AS |
878 | /* just declare this in any driver that really need it */ |
879 | extern int net2280_set_fifo_mode (struct usb_gadget *gadget, int mode); | |
880 | ||
1da177e4 LT |
881 | int net2280_set_fifo_mode (struct usb_gadget *gadget, int mode) |
882 | { | |
883 | return -ENOSYS; | |
884 | } | |
885 | EXPORT_SYMBOL (net2280_set_fifo_mode); | |
886 | ||
d9b76251 AS |
887 | |
888 | /* The gadget structure is stored inside the hcd structure and will be | |
889 | * released along with it. */ | |
890 | static void | |
891 | dummy_gadget_release (struct device *dev) | |
892 | { | |
893 | #if 0 /* usb_bus_put isn't EXPORTed! */ | |
894 | struct dummy *dum = gadget_dev_to_dummy (dev); | |
895 | ||
896 | usb_bus_put (&dummy_to_hcd (dum)->self); | |
897 | #endif | |
898 | } | |
899 | ||
900 | static int dummy_udc_probe (struct device *dev) | |
901 | { | |
902 | struct dummy *dum = the_controller; | |
903 | int rc; | |
904 | ||
905 | dum->gadget.name = gadget_name; | |
906 | dum->gadget.ops = &dummy_ops; | |
907 | dum->gadget.is_dualspeed = 1; | |
908 | ||
909 | /* maybe claim OTG support, though we won't complete HNP */ | |
910 | dum->gadget.is_otg = (dummy_to_hcd(dum)->self.otg_port != 0); | |
911 | ||
912 | strcpy (dum->gadget.dev.bus_id, "gadget"); | |
913 | dum->gadget.dev.parent = dev; | |
914 | dum->gadget.dev.release = dummy_gadget_release; | |
915 | rc = device_register (&dum->gadget.dev); | |
916 | if (rc < 0) | |
917 | return rc; | |
918 | ||
919 | #if 0 /* usb_bus_get isn't EXPORTed! */ | |
920 | usb_bus_get (&dummy_to_hcd (dum)->self); | |
921 | #endif | |
922 | ||
923 | dev_set_drvdata (dev, dum); | |
924 | device_create_file (&dum->gadget.dev, &dev_attr_function); | |
925 | return rc; | |
926 | } | |
927 | ||
928 | static int dummy_udc_remove (struct device *dev) | |
929 | { | |
930 | struct dummy *dum = dev_get_drvdata (dev); | |
931 | ||
932 | dev_set_drvdata (dev, NULL); | |
933 | device_remove_file (&dum->gadget.dev, &dev_attr_function); | |
934 | device_unregister (&dum->gadget.dev); | |
935 | return 0; | |
936 | } | |
937 | ||
9480e307 | 938 | static int dummy_udc_suspend (struct device *dev, pm_message_t state) |
391eca9d AS |
939 | { |
940 | struct dummy *dum = dev_get_drvdata(dev); | |
941 | ||
391eca9d AS |
942 | dev_dbg (dev, "%s\n", __FUNCTION__); |
943 | spin_lock_irq (&dum->lock); | |
944 | dum->udc_suspended = 1; | |
945 | set_link_state (dum); | |
946 | spin_unlock_irq (&dum->lock); | |
947 | ||
948 | dev->power.power_state = state; | |
949 | usb_hcd_poll_rh_status (dummy_to_hcd (dum)); | |
950 | return 0; | |
951 | } | |
952 | ||
9480e307 | 953 | static int dummy_udc_resume (struct device *dev) |
391eca9d AS |
954 | { |
955 | struct dummy *dum = dev_get_drvdata(dev); | |
956 | ||
391eca9d AS |
957 | dev_dbg (dev, "%s\n", __FUNCTION__); |
958 | spin_lock_irq (&dum->lock); | |
959 | dum->udc_suspended = 0; | |
960 | set_link_state (dum); | |
961 | spin_unlock_irq (&dum->lock); | |
962 | ||
963 | dev->power.power_state = PMSG_ON; | |
964 | usb_hcd_poll_rh_status (dummy_to_hcd (dum)); | |
965 | return 0; | |
966 | } | |
967 | ||
d9b76251 AS |
968 | static struct device_driver dummy_udc_driver = { |
969 | .name = (char *) gadget_name, | |
970 | .bus = &platform_bus_type, | |
971 | .probe = dummy_udc_probe, | |
972 | .remove = dummy_udc_remove, | |
391eca9d AS |
973 | .suspend = dummy_udc_suspend, |
974 | .resume = dummy_udc_resume, | |
d9b76251 AS |
975 | }; |
976 | ||
1da177e4 LT |
977 | /*-------------------------------------------------------------------------*/ |
978 | ||
979 | /* MASTER/HOST SIDE DRIVER | |
980 | * | |
981 | * this uses the hcd framework to hook up to host side drivers. | |
982 | * its root hub will only have one device, otherwise it acts like | |
983 | * a normal host controller. | |
984 | * | |
985 | * when urbs are queued, they're just stuck on a list that we | |
986 | * scan in a timer callback. that callback connects writes from | |
987 | * the host with reads from the device, and so on, based on the | |
988 | * usb 2.0 rules. | |
989 | */ | |
990 | ||
991 | static int dummy_urb_enqueue ( | |
992 | struct usb_hcd *hcd, | |
993 | struct usb_host_endpoint *ep, | |
994 | struct urb *urb, | |
55016f10 | 995 | gfp_t mem_flags |
1da177e4 LT |
996 | ) { |
997 | struct dummy *dum; | |
998 | struct urbp *urbp; | |
999 | unsigned long flags; | |
1000 | ||
1001 | if (!urb->transfer_buffer && urb->transfer_buffer_length) | |
1002 | return -EINVAL; | |
1003 | ||
1004 | urbp = kmalloc (sizeof *urbp, mem_flags); | |
1005 | if (!urbp) | |
1006 | return -ENOMEM; | |
1007 | urbp->urb = urb; | |
1008 | ||
1009 | dum = hcd_to_dummy (hcd); | |
1010 | spin_lock_irqsave (&dum->lock, flags); | |
1011 | ||
1012 | if (!dum->udev) { | |
1013 | dum->udev = urb->dev; | |
1014 | usb_get_dev (dum->udev); | |
1015 | } else if (unlikely (dum->udev != urb->dev)) | |
1016 | dev_err (dummy_dev(dum), "usb_device address has changed!\n"); | |
1017 | ||
1018 | list_add_tail (&urbp->urbp_list, &dum->urbp_list); | |
1019 | urb->hcpriv = urbp; | |
1020 | if (usb_pipetype (urb->pipe) == PIPE_CONTROL) | |
1021 | urb->error_count = 1; /* mark as a new urb */ | |
1022 | ||
1023 | /* kick the scheduler, it'll do the rest */ | |
1024 | if (!timer_pending (&dum->timer)) | |
1025 | mod_timer (&dum->timer, jiffies + 1); | |
1026 | ||
1027 | spin_unlock_irqrestore (&dum->lock, flags); | |
1028 | return 0; | |
1029 | } | |
1030 | ||
1031 | static int dummy_urb_dequeue (struct usb_hcd *hcd, struct urb *urb) | |
1032 | { | |
391eca9d AS |
1033 | struct dummy *dum; |
1034 | unsigned long flags; | |
1035 | ||
1036 | /* giveback happens automatically in timer callback, | |
1037 | * so make sure the callback happens */ | |
1038 | dum = hcd_to_dummy (hcd); | |
1039 | spin_lock_irqsave (&dum->lock, flags); | |
1040 | if (dum->rh_state != DUMMY_RH_RUNNING && !list_empty(&dum->urbp_list)) | |
1041 | mod_timer (&dum->timer, jiffies); | |
1042 | spin_unlock_irqrestore (&dum->lock, flags); | |
1da177e4 LT |
1043 | return 0; |
1044 | } | |
1045 | ||
1046 | static void maybe_set_status (struct urb *urb, int status) | |
1047 | { | |
1048 | spin_lock (&urb->lock); | |
1049 | if (urb->status == -EINPROGRESS) | |
1050 | urb->status = status; | |
1051 | spin_unlock (&urb->lock); | |
1052 | } | |
1053 | ||
1054 | /* transfer up to a frame's worth; caller must own lock */ | |
1055 | static int | |
1056 | transfer (struct dummy *dum, struct urb *urb, struct dummy_ep *ep, int limit) | |
1057 | { | |
1058 | struct dummy_request *req; | |
1059 | ||
1060 | top: | |
1061 | /* if there's no request queued, the device is NAKing; return */ | |
1062 | list_for_each_entry (req, &ep->queue, queue) { | |
1063 | unsigned host_len, dev_len, len; | |
1064 | int is_short, to_host; | |
1065 | int rescan = 0; | |
1066 | ||
1067 | /* 1..N packets of ep->ep.maxpacket each ... the last one | |
1068 | * may be short (including zero length). | |
1069 | * | |
1070 | * writer can send a zlp explicitly (length 0) or implicitly | |
1071 | * (length mod maxpacket zero, and 'zero' flag); they always | |
1072 | * terminate reads. | |
1073 | */ | |
1074 | host_len = urb->transfer_buffer_length - urb->actual_length; | |
1075 | dev_len = req->req.length - req->req.actual; | |
1076 | len = min (host_len, dev_len); | |
1077 | ||
1078 | /* FIXME update emulated data toggle too */ | |
1079 | ||
1080 | to_host = usb_pipein (urb->pipe); | |
1081 | if (unlikely (len == 0)) | |
1082 | is_short = 1; | |
1083 | else { | |
1084 | char *ubuf, *rbuf; | |
1085 | ||
1086 | /* not enough bandwidth left? */ | |
1087 | if (limit < ep->ep.maxpacket && limit < len) | |
1088 | break; | |
1089 | len = min (len, (unsigned) limit); | |
1090 | if (len == 0) | |
1091 | break; | |
1092 | ||
1093 | /* use an extra pass for the final short packet */ | |
1094 | if (len > ep->ep.maxpacket) { | |
1095 | rescan = 1; | |
1096 | len -= (len % ep->ep.maxpacket); | |
1097 | } | |
1098 | is_short = (len % ep->ep.maxpacket) != 0; | |
1099 | ||
1100 | /* else transfer packet(s) */ | |
1101 | ubuf = urb->transfer_buffer + urb->actual_length; | |
1102 | rbuf = req->req.buf + req->req.actual; | |
1103 | if (to_host) | |
1104 | memcpy (ubuf, rbuf, len); | |
1105 | else | |
1106 | memcpy (rbuf, ubuf, len); | |
1107 | ep->last_io = jiffies; | |
1108 | ||
1109 | limit -= len; | |
1110 | urb->actual_length += len; | |
1111 | req->req.actual += len; | |
1112 | } | |
1113 | ||
1114 | /* short packets terminate, maybe with overflow/underflow. | |
1115 | * it's only really an error to write too much. | |
1116 | * | |
1117 | * partially filling a buffer optionally blocks queue advances | |
1118 | * (so completion handlers can clean up the queue) but we don't | |
1119 | * need to emulate such data-in-flight. so we only show part | |
1120 | * of the URB_SHORT_NOT_OK effect: completion status. | |
1121 | */ | |
1122 | if (is_short) { | |
1123 | if (host_len == dev_len) { | |
1124 | req->req.status = 0; | |
1125 | maybe_set_status (urb, 0); | |
1126 | } else if (to_host) { | |
1127 | req->req.status = 0; | |
1128 | if (dev_len > host_len) | |
1129 | maybe_set_status (urb, -EOVERFLOW); | |
1130 | else | |
1131 | maybe_set_status (urb, | |
1132 | (urb->transfer_flags | |
1133 | & URB_SHORT_NOT_OK) | |
1134 | ? -EREMOTEIO : 0); | |
1135 | } else if (!to_host) { | |
1136 | maybe_set_status (urb, 0); | |
1137 | if (host_len > dev_len) | |
1138 | req->req.status = -EOVERFLOW; | |
1139 | else | |
1140 | req->req.status = 0; | |
1141 | } | |
1142 | ||
1143 | /* many requests terminate without a short packet */ | |
1144 | } else { | |
1145 | if (req->req.length == req->req.actual | |
1146 | && !req->req.zero) | |
1147 | req->req.status = 0; | |
1148 | if (urb->transfer_buffer_length == urb->actual_length | |
1149 | && !(urb->transfer_flags | |
1150 | & URB_ZERO_PACKET)) { | |
1151 | maybe_set_status (urb, 0); | |
1152 | } | |
1153 | } | |
1154 | ||
1155 | /* device side completion --> continuable */ | |
1156 | if (req->req.status != -EINPROGRESS) { | |
1157 | list_del_init (&req->queue); | |
1158 | ||
1159 | spin_unlock (&dum->lock); | |
1160 | req->req.complete (&ep->ep, &req->req); | |
1161 | spin_lock (&dum->lock); | |
1162 | ||
1163 | /* requests might have been unlinked... */ | |
1164 | rescan = 1; | |
1165 | } | |
1166 | ||
1167 | /* host side completion --> terminate */ | |
1168 | if (urb->status != -EINPROGRESS) | |
1169 | break; | |
1170 | ||
1171 | /* rescan to continue with any other queued i/o */ | |
1172 | if (rescan) | |
1173 | goto top; | |
1174 | } | |
1175 | return limit; | |
1176 | } | |
1177 | ||
1178 | static int periodic_bytes (struct dummy *dum, struct dummy_ep *ep) | |
1179 | { | |
1180 | int limit = ep->ep.maxpacket; | |
1181 | ||
1182 | if (dum->gadget.speed == USB_SPEED_HIGH) { | |
1183 | int tmp; | |
1184 | ||
1185 | /* high bandwidth mode */ | |
1186 | tmp = le16_to_cpu(ep->desc->wMaxPacketSize); | |
1da177e4 LT |
1187 | tmp = (tmp >> 11) & 0x03; |
1188 | tmp *= 8 /* applies to entire frame */; | |
1189 | limit += limit * tmp; | |
1190 | } | |
1191 | return limit; | |
1192 | } | |
1193 | ||
1194 | #define is_active(dum) ((dum->port_status & \ | |
1195 | (USB_PORT_STAT_CONNECTION | USB_PORT_STAT_ENABLE | \ | |
1196 | USB_PORT_STAT_SUSPEND)) \ | |
1197 | == (USB_PORT_STAT_CONNECTION | USB_PORT_STAT_ENABLE)) | |
1198 | ||
1199 | static struct dummy_ep *find_endpoint (struct dummy *dum, u8 address) | |
1200 | { | |
1201 | int i; | |
1202 | ||
1203 | if (!is_active (dum)) | |
1204 | return NULL; | |
1205 | if ((address & ~USB_DIR_IN) == 0) | |
1206 | return &dum->ep [0]; | |
1207 | for (i = 1; i < DUMMY_ENDPOINTS; i++) { | |
1208 | struct dummy_ep *ep = &dum->ep [i]; | |
1209 | ||
1210 | if (!ep->desc) | |
1211 | continue; | |
1212 | if (ep->desc->bEndpointAddress == address) | |
1213 | return ep; | |
1214 | } | |
1215 | return NULL; | |
1216 | } | |
1217 | ||
1218 | #undef is_active | |
1219 | ||
1220 | #define Dev_Request (USB_TYPE_STANDARD | USB_RECIP_DEVICE) | |
1221 | #define Dev_InRequest (Dev_Request | USB_DIR_IN) | |
1222 | #define Intf_Request (USB_TYPE_STANDARD | USB_RECIP_INTERFACE) | |
1223 | #define Intf_InRequest (Intf_Request | USB_DIR_IN) | |
1224 | #define Ep_Request (USB_TYPE_STANDARD | USB_RECIP_ENDPOINT) | |
1225 | #define Ep_InRequest (Ep_Request | USB_DIR_IN) | |
1226 | ||
1227 | /* drive both sides of the transfers; looks like irq handlers to | |
1228 | * both drivers except the callbacks aren't in_irq(). | |
1229 | */ | |
1230 | static void dummy_timer (unsigned long _dum) | |
1231 | { | |
1232 | struct dummy *dum = (struct dummy *) _dum; | |
1233 | struct urbp *urbp, *tmp; | |
1234 | unsigned long flags; | |
1235 | int limit, total; | |
1236 | int i; | |
1237 | ||
1238 | /* simplistic model for one frame's bandwidth */ | |
1239 | switch (dum->gadget.speed) { | |
1240 | case USB_SPEED_LOW: | |
1241 | total = 8/*bytes*/ * 12/*packets*/; | |
1242 | break; | |
1243 | case USB_SPEED_FULL: | |
1244 | total = 64/*bytes*/ * 19/*packets*/; | |
1245 | break; | |
1246 | case USB_SPEED_HIGH: | |
1247 | total = 512/*bytes*/ * 13/*packets*/ * 8/*uframes*/; | |
1248 | break; | |
1249 | default: | |
1250 | dev_err (dummy_dev(dum), "bogus device speed\n"); | |
1251 | return; | |
1252 | } | |
1253 | ||
1254 | /* FIXME if HZ != 1000 this will probably misbehave ... */ | |
1255 | ||
1256 | /* look at each urb queued by the host side driver */ | |
1257 | spin_lock_irqsave (&dum->lock, flags); | |
1258 | ||
1259 | if (!dum->udev) { | |
1260 | dev_err (dummy_dev(dum), | |
1261 | "timer fired with no URBs pending?\n"); | |
1262 | spin_unlock_irqrestore (&dum->lock, flags); | |
1263 | return; | |
1264 | } | |
1265 | ||
1266 | for (i = 0; i < DUMMY_ENDPOINTS; i++) { | |
1267 | if (!ep_name [i]) | |
1268 | break; | |
1269 | dum->ep [i].already_seen = 0; | |
1270 | } | |
1271 | ||
1272 | restart: | |
1273 | list_for_each_entry_safe (urbp, tmp, &dum->urbp_list, urbp_list) { | |
1274 | struct urb *urb; | |
1275 | struct dummy_request *req; | |
1276 | u8 address; | |
1277 | struct dummy_ep *ep = NULL; | |
1278 | int type; | |
1279 | ||
1280 | urb = urbp->urb; | |
1281 | if (urb->status != -EINPROGRESS) { | |
1282 | /* likely it was just unlinked */ | |
1283 | goto return_urb; | |
391eca9d AS |
1284 | } else if (dum->rh_state != DUMMY_RH_RUNNING) |
1285 | continue; | |
1da177e4 LT |
1286 | type = usb_pipetype (urb->pipe); |
1287 | ||
1288 | /* used up this frame's non-periodic bandwidth? | |
1289 | * FIXME there's infinite bandwidth for control and | |
1290 | * periodic transfers ... unrealistic. | |
1291 | */ | |
1292 | if (total <= 0 && type == PIPE_BULK) | |
1293 | continue; | |
1294 | ||
1295 | /* find the gadget's ep for this request (if configured) */ | |
1296 | address = usb_pipeendpoint (urb->pipe); | |
1297 | if (usb_pipein (urb->pipe)) | |
1298 | address |= USB_DIR_IN; | |
1299 | ep = find_endpoint(dum, address); | |
1300 | if (!ep) { | |
1301 | /* set_configuration() disagreement */ | |
1302 | dev_dbg (dummy_dev(dum), | |
1303 | "no ep configured for urb %p\n", | |
1304 | urb); | |
1305 | maybe_set_status (urb, -EPROTO); | |
1306 | goto return_urb; | |
1307 | } | |
1308 | ||
1309 | if (ep->already_seen) | |
1310 | continue; | |
1311 | ep->already_seen = 1; | |
1312 | if (ep == &dum->ep [0] && urb->error_count) { | |
1313 | ep->setup_stage = 1; /* a new urb */ | |
1314 | urb->error_count = 0; | |
1315 | } | |
1316 | if (ep->halted && !ep->setup_stage) { | |
1317 | /* NOTE: must not be iso! */ | |
1318 | dev_dbg (dummy_dev(dum), "ep %s halted, urb %p\n", | |
1319 | ep->ep.name, urb); | |
1320 | maybe_set_status (urb, -EPIPE); | |
1321 | goto return_urb; | |
1322 | } | |
1323 | /* FIXME make sure both ends agree on maxpacket */ | |
1324 | ||
1325 | /* handle control requests */ | |
1326 | if (ep == &dum->ep [0] && ep->setup_stage) { | |
1327 | struct usb_ctrlrequest setup; | |
1328 | int value = 1; | |
1329 | struct dummy_ep *ep2; | |
cc095b0b AS |
1330 | unsigned w_index; |
1331 | unsigned w_value; | |
1da177e4 LT |
1332 | |
1333 | setup = *(struct usb_ctrlrequest*) urb->setup_packet; | |
cc095b0b AS |
1334 | w_index = le16_to_cpu(setup.wIndex); |
1335 | w_value = le16_to_cpu(setup.wValue); | |
1336 | if (le16_to_cpu(setup.wLength) != | |
1337 | urb->transfer_buffer_length) { | |
1da177e4 LT |
1338 | maybe_set_status (urb, -EOVERFLOW); |
1339 | goto return_urb; | |
1340 | } | |
1341 | ||
1342 | /* paranoia, in case of stale queued data */ | |
1343 | list_for_each_entry (req, &ep->queue, queue) { | |
1344 | list_del_init (&req->queue); | |
1345 | req->req.status = -EOVERFLOW; | |
d9b76251 | 1346 | dev_dbg (udc_dev(dum), "stale req = %p\n", |
1da177e4 LT |
1347 | req); |
1348 | ||
1349 | spin_unlock (&dum->lock); | |
1350 | req->req.complete (&ep->ep, &req->req); | |
1351 | spin_lock (&dum->lock); | |
1352 | ep->already_seen = 0; | |
1353 | goto restart; | |
1354 | } | |
1355 | ||
1356 | /* gadget driver never sees set_address or operations | |
1357 | * on standard feature flags. some hardware doesn't | |
1358 | * even expose them. | |
1359 | */ | |
1360 | ep->last_io = jiffies; | |
1361 | ep->setup_stage = 0; | |
1362 | ep->halted = 0; | |
1363 | switch (setup.bRequest) { | |
1364 | case USB_REQ_SET_ADDRESS: | |
1365 | if (setup.bRequestType != Dev_Request) | |
1366 | break; | |
cc095b0b | 1367 | dum->address = w_value; |
1da177e4 | 1368 | maybe_set_status (urb, 0); |
d9b76251 | 1369 | dev_dbg (udc_dev(dum), "set_address = %d\n", |
cc095b0b | 1370 | w_value); |
1da177e4 LT |
1371 | value = 0; |
1372 | break; | |
1373 | case USB_REQ_SET_FEATURE: | |
1374 | if (setup.bRequestType == Dev_Request) { | |
1375 | value = 0; | |
cc095b0b | 1376 | switch (w_value) { |
1da177e4 LT |
1377 | case USB_DEVICE_REMOTE_WAKEUP: |
1378 | break; | |
5742b0c9 AS |
1379 | case USB_DEVICE_B_HNP_ENABLE: |
1380 | dum->gadget.b_hnp_enable = 1; | |
1381 | break; | |
1382 | case USB_DEVICE_A_HNP_SUPPORT: | |
1383 | dum->gadget.a_hnp_support = 1; | |
1384 | break; | |
1385 | case USB_DEVICE_A_ALT_HNP_SUPPORT: | |
1386 | dum->gadget.a_alt_hnp_support | |
1387 | = 1; | |
1388 | break; | |
1da177e4 LT |
1389 | default: |
1390 | value = -EOPNOTSUPP; | |
1391 | } | |
1392 | if (value == 0) { | |
1393 | dum->devstatus |= | |
cc095b0b | 1394 | (1 << w_value); |
1da177e4 LT |
1395 | maybe_set_status (urb, 0); |
1396 | } | |
1397 | ||
1398 | } else if (setup.bRequestType == Ep_Request) { | |
1399 | // endpoint halt | |
cc095b0b | 1400 | ep2 = find_endpoint (dum, w_index); |
1da177e4 LT |
1401 | if (!ep2) { |
1402 | value = -EOPNOTSUPP; | |
1403 | break; | |
1404 | } | |
1405 | ep2->halted = 1; | |
1406 | value = 0; | |
1407 | maybe_set_status (urb, 0); | |
1408 | } | |
1409 | break; | |
1410 | case USB_REQ_CLEAR_FEATURE: | |
1411 | if (setup.bRequestType == Dev_Request) { | |
cc095b0b | 1412 | switch (w_value) { |
1da177e4 LT |
1413 | case USB_DEVICE_REMOTE_WAKEUP: |
1414 | dum->devstatus &= ~(1 << | |
1415 | USB_DEVICE_REMOTE_WAKEUP); | |
1416 | value = 0; | |
1417 | maybe_set_status (urb, 0); | |
1418 | break; | |
1419 | default: | |
1420 | value = -EOPNOTSUPP; | |
1421 | break; | |
1422 | } | |
1423 | } else if (setup.bRequestType == Ep_Request) { | |
1424 | // endpoint halt | |
cc095b0b | 1425 | ep2 = find_endpoint (dum, w_index); |
1da177e4 LT |
1426 | if (!ep2) { |
1427 | value = -EOPNOTSUPP; | |
1428 | break; | |
1429 | } | |
1430 | ep2->halted = 0; | |
1431 | value = 0; | |
1432 | maybe_set_status (urb, 0); | |
1433 | } | |
1434 | break; | |
1435 | case USB_REQ_GET_STATUS: | |
1436 | if (setup.bRequestType == Dev_InRequest | |
1437 | || setup.bRequestType | |
1438 | == Intf_InRequest | |
1439 | || setup.bRequestType | |
1440 | == Ep_InRequest | |
1441 | ) { | |
1442 | char *buf; | |
1443 | ||
1444 | // device: remote wakeup, selfpowered | |
1445 | // interface: nothing | |
1446 | // endpoint: halt | |
1447 | buf = (char *)urb->transfer_buffer; | |
1448 | if (urb->transfer_buffer_length > 0) { | |
1449 | if (setup.bRequestType == | |
1450 | Ep_InRequest) { | |
cc095b0b | 1451 | ep2 = find_endpoint (dum, w_index); |
1da177e4 LT |
1452 | if (!ep2) { |
1453 | value = -EOPNOTSUPP; | |
1454 | break; | |
1455 | } | |
1456 | buf [0] = ep2->halted; | |
1457 | } else if (setup.bRequestType == | |
1458 | Dev_InRequest) { | |
1459 | buf [0] = (u8) | |
1460 | dum->devstatus; | |
1461 | } else | |
1462 | buf [0] = 0; | |
1463 | } | |
1464 | if (urb->transfer_buffer_length > 1) | |
1465 | buf [1] = 0; | |
1466 | urb->actual_length = min (2, | |
1467 | urb->transfer_buffer_length); | |
1468 | value = 0; | |
1469 | maybe_set_status (urb, 0); | |
1470 | } | |
1471 | break; | |
1472 | } | |
1473 | ||
1474 | /* gadget driver handles all other requests. block | |
1475 | * until setup() returns; no reentrancy issues etc. | |
1476 | */ | |
1477 | if (value > 0) { | |
1478 | spin_unlock (&dum->lock); | |
1479 | value = dum->driver->setup (&dum->gadget, | |
1480 | &setup); | |
1481 | spin_lock (&dum->lock); | |
1482 | ||
1483 | if (value >= 0) { | |
1484 | /* no delays (max 64KB data stage) */ | |
1485 | limit = 64*1024; | |
1486 | goto treat_control_like_bulk; | |
1487 | } | |
1488 | /* error, see below */ | |
1489 | } | |
1490 | ||
1491 | if (value < 0) { | |
1492 | if (value != -EOPNOTSUPP) | |
d9b76251 | 1493 | dev_dbg (udc_dev(dum), |
1da177e4 LT |
1494 | "setup --> %d\n", |
1495 | value); | |
1496 | maybe_set_status (urb, -EPIPE); | |
1497 | urb->actual_length = 0; | |
1498 | } | |
1499 | ||
1500 | goto return_urb; | |
1501 | } | |
1502 | ||
1503 | /* non-control requests */ | |
1504 | limit = total; | |
1505 | switch (usb_pipetype (urb->pipe)) { | |
1506 | case PIPE_ISOCHRONOUS: | |
1507 | /* FIXME is it urb->interval since the last xfer? | |
1508 | * use urb->iso_frame_desc[i]. | |
1509 | * complete whether or not ep has requests queued. | |
1510 | * report random errors, to debug drivers. | |
1511 | */ | |
1512 | limit = max (limit, periodic_bytes (dum, ep)); | |
1513 | maybe_set_status (urb, -ENOSYS); | |
1514 | break; | |
1515 | ||
1516 | case PIPE_INTERRUPT: | |
1517 | /* FIXME is it urb->interval since the last xfer? | |
1518 | * this almost certainly polls too fast. | |
1519 | */ | |
1520 | limit = max (limit, periodic_bytes (dum, ep)); | |
1521 | /* FALLTHROUGH */ | |
1522 | ||
1523 | // case PIPE_BULK: case PIPE_CONTROL: | |
1524 | default: | |
1525 | treat_control_like_bulk: | |
1526 | ep->last_io = jiffies; | |
1527 | total = transfer (dum, urb, ep, limit); | |
1528 | break; | |
1529 | } | |
1530 | ||
1531 | /* incomplete transfer? */ | |
1532 | if (urb->status == -EINPROGRESS) | |
1533 | continue; | |
1534 | ||
1535 | return_urb: | |
1536 | urb->hcpriv = NULL; | |
1537 | list_del (&urbp->urbp_list); | |
1538 | kfree (urbp); | |
1539 | if (ep) | |
1540 | ep->already_seen = ep->setup_stage = 0; | |
1541 | ||
1542 | spin_unlock (&dum->lock); | |
1543 | usb_hcd_giveback_urb (dummy_to_hcd(dum), urb, NULL); | |
1544 | spin_lock (&dum->lock); | |
1545 | ||
1546 | goto restart; | |
1547 | } | |
1548 | ||
391eca9d | 1549 | if (list_empty (&dum->urbp_list)) { |
1da177e4 LT |
1550 | usb_put_dev (dum->udev); |
1551 | dum->udev = NULL; | |
391eca9d AS |
1552 | } else if (dum->rh_state == DUMMY_RH_RUNNING) { |
1553 | /* want a 1 msec delay here */ | |
1554 | mod_timer (&dum->timer, jiffies + msecs_to_jiffies(1)); | |
1da177e4 LT |
1555 | } |
1556 | ||
1557 | spin_unlock_irqrestore (&dum->lock, flags); | |
1558 | } | |
1559 | ||
1560 | /*-------------------------------------------------------------------------*/ | |
1561 | ||
1562 | #define PORT_C_MASK \ | |
c2db8b5e AS |
1563 | ((USB_PORT_STAT_C_CONNECTION \ |
1564 | | USB_PORT_STAT_C_ENABLE \ | |
1565 | | USB_PORT_STAT_C_SUSPEND \ | |
1566 | | USB_PORT_STAT_C_OVERCURRENT \ | |
1567 | | USB_PORT_STAT_C_RESET) << 16) | |
1da177e4 LT |
1568 | |
1569 | static int dummy_hub_status (struct usb_hcd *hcd, char *buf) | |
1570 | { | |
1571 | struct dummy *dum; | |
1572 | unsigned long flags; | |
391eca9d | 1573 | int retval = 0; |
1da177e4 LT |
1574 | |
1575 | dum = hcd_to_dummy (hcd); | |
1576 | ||
1577 | spin_lock_irqsave (&dum->lock, flags); | |
391eca9d AS |
1578 | if (hcd->state != HC_STATE_RUNNING) |
1579 | goto done; | |
f1c39fad AS |
1580 | |
1581 | if (dum->resuming && time_after_eq (jiffies, dum->re_timeout)) { | |
1582 | dum->port_status |= (USB_PORT_STAT_C_SUSPEND << 16); | |
1583 | dum->port_status &= ~USB_PORT_STAT_SUSPEND; | |
1584 | set_link_state (dum); | |
1585 | } | |
1586 | ||
391eca9d | 1587 | if ((dum->port_status & PORT_C_MASK) != 0) { |
1da177e4 LT |
1588 | *buf = (1 << 1); |
1589 | dev_dbg (dummy_dev(dum), "port status 0x%08x has changes\n", | |
391eca9d | 1590 | dum->port_status); |
1da177e4 | 1591 | retval = 1; |
391eca9d AS |
1592 | if (dum->rh_state == DUMMY_RH_SUSPENDED) |
1593 | usb_hcd_resume_root_hub (hcd); | |
1da177e4 | 1594 | } |
391eca9d | 1595 | done: |
1da177e4 LT |
1596 | spin_unlock_irqrestore (&dum->lock, flags); |
1597 | return retval; | |
1598 | } | |
1599 | ||
1600 | static inline void | |
1601 | hub_descriptor (struct usb_hub_descriptor *desc) | |
1602 | { | |
1603 | memset (desc, 0, sizeof *desc); | |
1604 | desc->bDescriptorType = 0x29; | |
1605 | desc->bDescLength = 9; | |
cc095b0b AS |
1606 | desc->wHubCharacteristics = (__force __u16) |
1607 | (__constant_cpu_to_le16 (0x0001)); | |
1da177e4 LT |
1608 | desc->bNbrPorts = 1; |
1609 | desc->bitmap [0] = 0xff; | |
1610 | desc->bitmap [1] = 0xff; | |
1611 | } | |
1612 | ||
1613 | static int dummy_hub_control ( | |
1614 | struct usb_hcd *hcd, | |
1615 | u16 typeReq, | |
1616 | u16 wValue, | |
1617 | u16 wIndex, | |
1618 | char *buf, | |
1619 | u16 wLength | |
1620 | ) { | |
1621 | struct dummy *dum; | |
1622 | int retval = 0; | |
1623 | unsigned long flags; | |
1624 | ||
391eca9d AS |
1625 | if (hcd->state != HC_STATE_RUNNING) |
1626 | return -ETIMEDOUT; | |
1627 | ||
1da177e4 LT |
1628 | dum = hcd_to_dummy (hcd); |
1629 | spin_lock_irqsave (&dum->lock, flags); | |
1630 | switch (typeReq) { | |
1631 | case ClearHubFeature: | |
1632 | break; | |
1633 | case ClearPortFeature: | |
1634 | switch (wValue) { | |
1635 | case USB_PORT_FEAT_SUSPEND: | |
c2db8b5e | 1636 | if (dum->port_status & USB_PORT_STAT_SUSPEND) { |
1da177e4 LT |
1637 | /* 20msec resume signaling */ |
1638 | dum->resuming = 1; | |
1639 | dum->re_timeout = jiffies + | |
f1c39fad | 1640 | msecs_to_jiffies(20); |
1da177e4 LT |
1641 | } |
1642 | break; | |
1643 | case USB_PORT_FEAT_POWER: | |
f1c39fad AS |
1644 | if (dum->port_status & USB_PORT_STAT_POWER) |
1645 | dev_dbg (dummy_dev(dum), "power-off\n"); | |
1646 | /* FALLS THROUGH */ | |
1da177e4 LT |
1647 | default: |
1648 | dum->port_status &= ~(1 << wValue); | |
f1c39fad | 1649 | set_link_state (dum); |
1da177e4 LT |
1650 | } |
1651 | break; | |
1652 | case GetHubDescriptor: | |
1653 | hub_descriptor ((struct usb_hub_descriptor *) buf); | |
1654 | break; | |
1655 | case GetHubStatus: | |
cc095b0b | 1656 | *(__le32 *) buf = __constant_cpu_to_le32 (0); |
1da177e4 LT |
1657 | break; |
1658 | case GetPortStatus: | |
1659 | if (wIndex != 1) | |
1660 | retval = -EPIPE; | |
1661 | ||
1662 | /* whoever resets or resumes must GetPortStatus to | |
1663 | * complete it!! | |
1664 | */ | |
f1c39fad AS |
1665 | if (dum->resuming && |
1666 | time_after_eq (jiffies, dum->re_timeout)) { | |
c2db8b5e AS |
1667 | dum->port_status |= (USB_PORT_STAT_C_SUSPEND << 16); |
1668 | dum->port_status &= ~USB_PORT_STAT_SUSPEND; | |
1da177e4 | 1669 | } |
f1c39fad AS |
1670 | if ((dum->port_status & USB_PORT_STAT_RESET) != 0 && |
1671 | time_after_eq (jiffies, dum->re_timeout)) { | |
c2db8b5e AS |
1672 | dum->port_status |= (USB_PORT_STAT_C_RESET << 16); |
1673 | dum->port_status &= ~USB_PORT_STAT_RESET; | |
f1c39fad | 1674 | if (dum->pullup) { |
1da177e4 LT |
1675 | dum->port_status |= USB_PORT_STAT_ENABLE; |
1676 | /* give it the best speed we agree on */ | |
1677 | dum->gadget.speed = dum->driver->speed; | |
1678 | dum->gadget.ep0->maxpacket = 64; | |
1679 | switch (dum->gadget.speed) { | |
1680 | case USB_SPEED_HIGH: | |
1681 | dum->port_status |= | |
1682 | USB_PORT_STAT_HIGH_SPEED; | |
1683 | break; | |
1684 | case USB_SPEED_LOW: | |
1685 | dum->gadget.ep0->maxpacket = 8; | |
1686 | dum->port_status |= | |
1687 | USB_PORT_STAT_LOW_SPEED; | |
1688 | break; | |
1689 | default: | |
1690 | dum->gadget.speed = USB_SPEED_FULL; | |
1691 | break; | |
1692 | } | |
1693 | } | |
1694 | } | |
f1c39fad | 1695 | set_link_state (dum); |
cc095b0b AS |
1696 | ((__le16 *) buf)[0] = cpu_to_le16 (dum->port_status); |
1697 | ((__le16 *) buf)[1] = cpu_to_le16 (dum->port_status >> 16); | |
1da177e4 LT |
1698 | break; |
1699 | case SetHubFeature: | |
1700 | retval = -EPIPE; | |
1701 | break; | |
1702 | case SetPortFeature: | |
1703 | switch (wValue) { | |
1704 | case USB_PORT_FEAT_SUSPEND: | |
f1c39fad | 1705 | if (dum->active) { |
c2db8b5e | 1706 | dum->port_status |= USB_PORT_STAT_SUSPEND; |
f1c39fad AS |
1707 | |
1708 | /* HNP would happen here; for now we | |
1709 | * assume b_bus_req is always true. | |
1710 | */ | |
1711 | set_link_state (dum); | |
1712 | if (((1 << USB_DEVICE_B_HNP_ENABLE) | |
1713 | & dum->devstatus) != 0) | |
1714 | dev_dbg (dummy_dev(dum), | |
5742b0c9 | 1715 | "no HNP yet!\n"); |
1da177e4 LT |
1716 | } |
1717 | break; | |
f1c39fad AS |
1718 | case USB_PORT_FEAT_POWER: |
1719 | dum->port_status |= USB_PORT_STAT_POWER; | |
1720 | set_link_state (dum); | |
1721 | break; | |
1da177e4 | 1722 | case USB_PORT_FEAT_RESET: |
f1c39fad AS |
1723 | /* if it's already enabled, disable */ |
1724 | dum->port_status &= ~(USB_PORT_STAT_ENABLE | |
1725 | | USB_PORT_STAT_LOW_SPEED | |
1726 | | USB_PORT_STAT_HIGH_SPEED); | |
391eca9d | 1727 | dum->devstatus = 0; |
1da177e4 LT |
1728 | /* 50msec reset signaling */ |
1729 | dum->re_timeout = jiffies + msecs_to_jiffies(50); | |
f1c39fad | 1730 | /* FALLS THROUGH */ |
1da177e4 | 1731 | default: |
f1c39fad AS |
1732 | if ((dum->port_status & USB_PORT_STAT_POWER) != 0) { |
1733 | dum->port_status |= (1 << wValue); | |
1734 | set_link_state (dum); | |
1735 | } | |
1da177e4 LT |
1736 | } |
1737 | break; | |
1738 | ||
1739 | default: | |
1740 | dev_dbg (dummy_dev(dum), | |
1741 | "hub control req%04x v%04x i%04x l%d\n", | |
1742 | typeReq, wValue, wIndex, wLength); | |
1743 | ||
1744 | /* "protocol stall" on error */ | |
1745 | retval = -EPIPE; | |
1746 | } | |
1747 | spin_unlock_irqrestore (&dum->lock, flags); | |
685eb93f AS |
1748 | |
1749 | if ((dum->port_status & PORT_C_MASK) != 0) | |
1750 | usb_hcd_poll_rh_status (hcd); | |
1da177e4 LT |
1751 | return retval; |
1752 | } | |
1753 | ||
0c0382e3 | 1754 | static int dummy_bus_suspend (struct usb_hcd *hcd) |
391eca9d AS |
1755 | { |
1756 | struct dummy *dum = hcd_to_dummy (hcd); | |
1757 | ||
1758 | spin_lock_irq (&dum->lock); | |
1759 | dum->rh_state = DUMMY_RH_SUSPENDED; | |
1760 | set_link_state (dum); | |
1761 | spin_unlock_irq (&dum->lock); | |
1762 | return 0; | |
1763 | } | |
1764 | ||
0c0382e3 | 1765 | static int dummy_bus_resume (struct usb_hcd *hcd) |
391eca9d AS |
1766 | { |
1767 | struct dummy *dum = hcd_to_dummy (hcd); | |
1768 | ||
1769 | spin_lock_irq (&dum->lock); | |
1770 | dum->rh_state = DUMMY_RH_RUNNING; | |
1771 | set_link_state (dum); | |
1772 | if (!list_empty(&dum->urbp_list)) | |
1773 | mod_timer (&dum->timer, jiffies); | |
1774 | spin_unlock_irq (&dum->lock); | |
1775 | return 0; | |
1776 | } | |
1da177e4 LT |
1777 | |
1778 | /*-------------------------------------------------------------------------*/ | |
1779 | ||
1780 | static inline ssize_t | |
1781 | show_urb (char *buf, size_t size, struct urb *urb) | |
1782 | { | |
1783 | int ep = usb_pipeendpoint (urb->pipe); | |
1784 | ||
1785 | return snprintf (buf, size, | |
1786 | "urb/%p %s ep%d%s%s len %d/%d\n", | |
1787 | urb, | |
1788 | ({ char *s; | |
1789 | switch (urb->dev->speed) { | |
1790 | case USB_SPEED_LOW: s = "ls"; break; | |
1791 | case USB_SPEED_FULL: s = "fs"; break; | |
1792 | case USB_SPEED_HIGH: s = "hs"; break; | |
1793 | default: s = "?"; break; | |
1794 | }; s; }), | |
1795 | ep, ep ? (usb_pipein (urb->pipe) ? "in" : "out") : "", | |
1796 | ({ char *s; \ | |
1797 | switch (usb_pipetype (urb->pipe)) { \ | |
1798 | case PIPE_CONTROL: s = ""; break; \ | |
1799 | case PIPE_BULK: s = "-bulk"; break; \ | |
1800 | case PIPE_INTERRUPT: s = "-int"; break; \ | |
1801 | default: s = "-iso"; break; \ | |
1802 | }; s;}), | |
1803 | urb->actual_length, urb->transfer_buffer_length); | |
1804 | } | |
1805 | ||
1806 | static ssize_t | |
10523b3b | 1807 | show_urbs (struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
1808 | { |
1809 | struct usb_hcd *hcd = dev_get_drvdata (dev); | |
1810 | struct dummy *dum = hcd_to_dummy (hcd); | |
1811 | struct urbp *urbp; | |
1812 | size_t size = 0; | |
1813 | unsigned long flags; | |
1814 | ||
1815 | spin_lock_irqsave (&dum->lock, flags); | |
1816 | list_for_each_entry (urbp, &dum->urbp_list, urbp_list) { | |
1817 | size_t temp; | |
1818 | ||
1819 | temp = show_urb (buf, PAGE_SIZE - size, urbp->urb); | |
1820 | buf += temp; | |
1821 | size += temp; | |
1822 | } | |
1823 | spin_unlock_irqrestore (&dum->lock, flags); | |
1824 | ||
1825 | return size; | |
1826 | } | |
1827 | static DEVICE_ATTR (urbs, S_IRUGO, show_urbs, NULL); | |
1828 | ||
1829 | static int dummy_start (struct usb_hcd *hcd) | |
1830 | { | |
1831 | struct dummy *dum; | |
1da177e4 LT |
1832 | |
1833 | dum = hcd_to_dummy (hcd); | |
1834 | ||
1835 | /* | |
1836 | * MASTER side init ... we emulate a root hub that'll only ever | |
1837 | * talk to one device (the slave side). Also appears in sysfs, | |
1838 | * just like more familiar pci-based HCDs. | |
1839 | */ | |
1840 | spin_lock_init (&dum->lock); | |
1841 | init_timer (&dum->timer); | |
1842 | dum->timer.function = dummy_timer; | |
1843 | dum->timer.data = (unsigned long) dum; | |
391eca9d | 1844 | dum->rh_state = DUMMY_RH_RUNNING; |
1da177e4 LT |
1845 | |
1846 | INIT_LIST_HEAD (&dum->urbp_list); | |
1847 | ||
bc96c0ad AS |
1848 | /* only show a low-power port: just 8mA */ |
1849 | hcd->power_budget = 8; | |
1da177e4 | 1850 | hcd->state = HC_STATE_RUNNING; |
685eb93f | 1851 | hcd->uses_new_polling = 1; |
1da177e4 | 1852 | |
5742b0c9 AS |
1853 | #ifdef CONFIG_USB_OTG |
1854 | hcd->self.otg_port = 1; | |
1855 | #endif | |
1856 | ||
1da177e4 LT |
1857 | /* FIXME 'urbs' should be a per-device thing, maybe in usbcore */ |
1858 | device_create_file (dummy_dev(dum), &dev_attr_urbs); | |
1859 | return 0; | |
1da177e4 LT |
1860 | } |
1861 | ||
1862 | static void dummy_stop (struct usb_hcd *hcd) | |
1863 | { | |
1864 | struct dummy *dum; | |
1865 | ||
1866 | dum = hcd_to_dummy (hcd); | |
1867 | ||
1868 | device_remove_file (dummy_dev(dum), &dev_attr_urbs); | |
1da177e4 | 1869 | usb_gadget_unregister_driver (dum->driver); |
1da177e4 LT |
1870 | dev_info (dummy_dev(dum), "stopped\n"); |
1871 | } | |
1872 | ||
1873 | /*-------------------------------------------------------------------------*/ | |
1874 | ||
1875 | static int dummy_h_get_frame (struct usb_hcd *hcd) | |
1876 | { | |
1877 | return dummy_g_get_frame (NULL); | |
1878 | } | |
1879 | ||
1880 | static const struct hc_driver dummy_hcd = { | |
1881 | .description = (char *) driver_name, | |
1882 | .product_desc = "Dummy host controller", | |
1883 | .hcd_priv_size = sizeof(struct dummy), | |
1884 | ||
1885 | .flags = HCD_USB2, | |
1886 | ||
1887 | .start = dummy_start, | |
1888 | .stop = dummy_stop, | |
1889 | ||
1890 | .urb_enqueue = dummy_urb_enqueue, | |
1891 | .urb_dequeue = dummy_urb_dequeue, | |
1892 | ||
1893 | .get_frame_number = dummy_h_get_frame, | |
1894 | ||
1895 | .hub_status_data = dummy_hub_status, | |
1896 | .hub_control = dummy_hub_control, | |
0c0382e3 AS |
1897 | .bus_suspend = dummy_bus_suspend, |
1898 | .bus_resume = dummy_bus_resume, | |
1da177e4 LT |
1899 | }; |
1900 | ||
d9b76251 | 1901 | static int dummy_hcd_probe (struct device *dev) |
1da177e4 LT |
1902 | { |
1903 | struct usb_hcd *hcd; | |
1904 | int retval; | |
1905 | ||
1906 | dev_info (dev, "%s, driver " DRIVER_VERSION "\n", driver_desc); | |
1907 | ||
1908 | hcd = usb_create_hcd (&dummy_hcd, dev, dev->bus_id); | |
1909 | if (!hcd) | |
1910 | return -ENOMEM; | |
1911 | the_controller = hcd_to_dummy (hcd); | |
1912 | ||
1913 | retval = usb_add_hcd(hcd, 0, 0); | |
1914 | if (retval != 0) { | |
1915 | usb_put_hcd (hcd); | |
1916 | the_controller = NULL; | |
1917 | } | |
1918 | return retval; | |
1919 | } | |
1920 | ||
d9b76251 | 1921 | static int dummy_hcd_remove (struct device *dev) |
1da177e4 LT |
1922 | { |
1923 | struct usb_hcd *hcd; | |
1924 | ||
1925 | hcd = dev_get_drvdata (dev); | |
1926 | usb_remove_hcd (hcd); | |
1927 | usb_put_hcd (hcd); | |
1928 | the_controller = NULL; | |
d9b76251 | 1929 | return 0; |
1da177e4 LT |
1930 | } |
1931 | ||
9480e307 | 1932 | static int dummy_hcd_suspend (struct device *dev, pm_message_t state) |
391eca9d AS |
1933 | { |
1934 | struct usb_hcd *hcd; | |
1935 | ||
391eca9d AS |
1936 | dev_dbg (dev, "%s\n", __FUNCTION__); |
1937 | hcd = dev_get_drvdata (dev); | |
1938 | ||
391eca9d AS |
1939 | hcd->state = HC_STATE_SUSPENDED; |
1940 | return 0; | |
1941 | } | |
1942 | ||
9480e307 | 1943 | static int dummy_hcd_resume (struct device *dev) |
391eca9d AS |
1944 | { |
1945 | struct usb_hcd *hcd; | |
1946 | ||
391eca9d AS |
1947 | dev_dbg (dev, "%s\n", __FUNCTION__); |
1948 | hcd = dev_get_drvdata (dev); | |
1949 | hcd->state = HC_STATE_RUNNING; | |
1950 | ||
391eca9d AS |
1951 | usb_hcd_poll_rh_status (hcd); |
1952 | return 0; | |
1953 | } | |
1954 | ||
d9b76251 AS |
1955 | static struct device_driver dummy_hcd_driver = { |
1956 | .name = (char *) driver_name, | |
1957 | .bus = &platform_bus_type, | |
1958 | .probe = dummy_hcd_probe, | |
1959 | .remove = dummy_hcd_remove, | |
391eca9d AS |
1960 | .suspend = dummy_hcd_suspend, |
1961 | .resume = dummy_hcd_resume, | |
d9b76251 | 1962 | }; |
1da177e4 | 1963 | |
d9b76251 | 1964 | /*-------------------------------------------------------------------------*/ |
1da177e4 | 1965 | |
d9b76251 AS |
1966 | /* These don't need to do anything because the pdev structures are |
1967 | * statically allocated. */ | |
1968 | static void | |
1969 | dummy_udc_release (struct device *dev) {} | |
1da177e4 | 1970 | |
d9b76251 AS |
1971 | static void |
1972 | dummy_hcd_release (struct device *dev) {} | |
1973 | ||
1974 | static struct platform_device the_udc_pdev = { | |
1975 | .name = (char *) gadget_name, | |
1976 | .id = -1, | |
1977 | .dev = { | |
1978 | .release = dummy_udc_release, | |
1979 | }, | |
1980 | }; | |
1da177e4 | 1981 | |
d9b76251 AS |
1982 | static struct platform_device the_hcd_pdev = { |
1983 | .name = (char *) driver_name, | |
1984 | .id = -1, | |
1985 | .dev = { | |
1986 | .release = dummy_hcd_release, | |
1987 | }, | |
1988 | }; | |
1da177e4 LT |
1989 | |
1990 | static int __init init (void) | |
1991 | { | |
1992 | int retval; | |
1993 | ||
1994 | if (usb_disabled ()) | |
1995 | return -ENODEV; | |
d9b76251 AS |
1996 | |
1997 | retval = driver_register (&dummy_hcd_driver); | |
1998 | if (retval < 0) | |
1da177e4 | 1999 | return retval; |
d9b76251 AS |
2000 | |
2001 | retval = driver_register (&dummy_udc_driver); | |
2002 | if (retval < 0) | |
2003 | goto err_register_udc_driver; | |
2004 | ||
2005 | retval = platform_device_register (&the_hcd_pdev); | |
2006 | if (retval < 0) | |
2007 | goto err_register_hcd; | |
2008 | ||
2009 | retval = platform_device_register (&the_udc_pdev); | |
2010 | if (retval < 0) | |
2011 | goto err_register_udc; | |
2012 | return retval; | |
2013 | ||
2014 | err_register_udc: | |
2015 | platform_device_unregister (&the_hcd_pdev); | |
2016 | err_register_hcd: | |
2017 | driver_unregister (&dummy_udc_driver); | |
2018 | err_register_udc_driver: | |
2019 | driver_unregister (&dummy_hcd_driver); | |
1da177e4 LT |
2020 | return retval; |
2021 | } | |
2022 | module_init (init); | |
2023 | ||
2024 | static void __exit cleanup (void) | |
2025 | { | |
d9b76251 AS |
2026 | platform_device_unregister (&the_udc_pdev); |
2027 | platform_device_unregister (&the_hcd_pdev); | |
2028 | driver_unregister (&dummy_udc_driver); | |
2029 | driver_unregister (&dummy_hcd_driver); | |
1da177e4 LT |
2030 | } |
2031 | module_exit (cleanup); |