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usb: gadget: dummy_hcd: use less checks for USB_SPEED_SUPER
[deliverable/linux.git] / drivers / usb / gadget / dummy_hcd.c
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 #include <linux/module.h>
38 #include <linux/kernel.h>
39 #include <linux/delay.h>
40 #include <linux/ioport.h>
41 #include <linux/slab.h>
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>
47 #include <linux/platform_device.h>
48 #include <linux/usb.h>
49 #include <linux/usb/gadget.h>
50 #include <linux/usb/hcd.h>
51
52 #include <asm/byteorder.h>
53 #include <asm/io.h>
54 #include <asm/irq.h>
55 #include <asm/system.h>
56 #include <asm/unaligned.h>
57
58
59 #define DRIVER_DESC "USB Host+Gadget Emulator"
60 #define DRIVER_VERSION "02 May 2005"
61
62 #define POWER_BUDGET 500 /* in mA; use 8 for low-power port testing */
63
64 static const char driver_name [] = "dummy_hcd";
65 static const char driver_desc [] = "USB Host+Gadget Emulator";
66
67 static const char gadget_name [] = "dummy_udc";
68
69 MODULE_DESCRIPTION (DRIVER_DESC);
70 MODULE_AUTHOR ("David Brownell");
71 MODULE_LICENSE ("GPL");
72
73 struct dummy_hcd_module_parameters {
74 bool is_super_speed;
75 bool is_high_speed;
76 };
77
78 static struct dummy_hcd_module_parameters mod_data = {
79 .is_super_speed = false,
80 .is_high_speed = true,
81 };
82 module_param_named(is_super_speed, mod_data.is_super_speed, bool, S_IRUGO);
83 MODULE_PARM_DESC(is_super_speed, "true to simulate SuperSpeed connection");
84 module_param_named(is_high_speed, mod_data.is_high_speed, bool, S_IRUGO);
85 MODULE_PARM_DESC(is_high_speed, "true to simulate HighSpeed connection");
86 /*-------------------------------------------------------------------------*/
87
88 /* gadget side driver data structres */
89 struct dummy_ep {
90 struct list_head queue;
91 unsigned long last_io; /* jiffies timestamp */
92 struct usb_gadget *gadget;
93 const struct usb_endpoint_descriptor *desc;
94 struct usb_ep ep;
95 unsigned halted : 1;
96 unsigned wedged : 1;
97 unsigned already_seen : 1;
98 unsigned setup_stage : 1;
99 };
100
101 struct dummy_request {
102 struct list_head queue; /* ep's requests */
103 struct usb_request req;
104 };
105
106 static inline struct dummy_ep *usb_ep_to_dummy_ep (struct usb_ep *_ep)
107 {
108 return container_of (_ep, struct dummy_ep, ep);
109 }
110
111 static inline struct dummy_request *usb_request_to_dummy_request
112 (struct usb_request *_req)
113 {
114 return container_of (_req, struct dummy_request, req);
115 }
116
117 /*-------------------------------------------------------------------------*/
118
119 /*
120 * Every device has ep0 for control requests, plus up to 30 more endpoints,
121 * in one of two types:
122 *
123 * - Configurable: direction (in/out), type (bulk, iso, etc), and endpoint
124 * number can be changed. Names like "ep-a" are used for this type.
125 *
126 * - Fixed Function: in other cases. some characteristics may be mutable;
127 * that'd be hardware-specific. Names like "ep12out-bulk" are used.
128 *
129 * Gadget drivers are responsible for not setting up conflicting endpoint
130 * configurations, illegal or unsupported packet lengths, and so on.
131 */
132
133 static const char ep0name [] = "ep0";
134
135 static const char *const ep_name [] = {
136 ep0name, /* everyone has ep0 */
137
138 /* act like a net2280: high speed, six configurable endpoints */
139 "ep-a", "ep-b", "ep-c", "ep-d", "ep-e", "ep-f",
140
141 /* or like pxa250: fifteen fixed function endpoints */
142 "ep1in-bulk", "ep2out-bulk", "ep3in-iso", "ep4out-iso", "ep5in-int",
143 "ep6in-bulk", "ep7out-bulk", "ep8in-iso", "ep9out-iso", "ep10in-int",
144 "ep11in-bulk", "ep12out-bulk", "ep13in-iso", "ep14out-iso",
145 "ep15in-int",
146
147 /* or like sa1100: two fixed function endpoints */
148 "ep1out-bulk", "ep2in-bulk",
149 };
150 #define DUMMY_ENDPOINTS ARRAY_SIZE(ep_name)
151
152 /*-------------------------------------------------------------------------*/
153
154 #define FIFO_SIZE 64
155
156 struct urbp {
157 struct urb *urb;
158 struct list_head urbp_list;
159 };
160
161
162 enum dummy_rh_state {
163 DUMMY_RH_RESET,
164 DUMMY_RH_SUSPENDED,
165 DUMMY_RH_RUNNING
166 };
167
168 struct dummy_hcd {
169 struct dummy *dum;
170 enum dummy_rh_state rh_state;
171 struct timer_list timer;
172 u32 port_status;
173 u32 old_status;
174 unsigned long re_timeout;
175
176 struct usb_device *udev;
177 struct list_head urbp_list;
178
179 unsigned active:1;
180 unsigned old_active:1;
181 unsigned resuming:1;
182 };
183
184 struct dummy {
185 spinlock_t lock;
186
187 /*
188 * SLAVE/GADGET side support
189 */
190 struct dummy_ep ep [DUMMY_ENDPOINTS];
191 int address;
192 struct usb_gadget gadget;
193 struct usb_gadget_driver *driver;
194 struct dummy_request fifo_req;
195 u8 fifo_buf [FIFO_SIZE];
196 u16 devstatus;
197 unsigned udc_suspended:1;
198 unsigned pullup:1;
199
200 /*
201 * MASTER/HOST side support
202 */
203 struct dummy_hcd *hs_hcd;
204 struct dummy_hcd *ss_hcd;
205 };
206
207 static inline struct dummy_hcd *hcd_to_dummy_hcd(struct usb_hcd *hcd)
208 {
209 return (struct dummy_hcd *) (hcd->hcd_priv);
210 }
211
212 static inline struct usb_hcd *dummy_hcd_to_hcd(struct dummy_hcd *dum)
213 {
214 return container_of((void *) dum, struct usb_hcd, hcd_priv);
215 }
216
217 static inline struct device *dummy_dev(struct dummy_hcd *dum)
218 {
219 return dummy_hcd_to_hcd(dum)->self.controller;
220 }
221
222 static inline struct device *udc_dev (struct dummy *dum)
223 {
224 return dum->gadget.dev.parent;
225 }
226
227 static inline struct dummy *ep_to_dummy (struct dummy_ep *ep)
228 {
229 return container_of (ep->gadget, struct dummy, gadget);
230 }
231
232 static inline struct dummy_hcd *gadget_to_dummy_hcd(struct usb_gadget *gadget)
233 {
234 struct dummy *dum = container_of(gadget, struct dummy, gadget);
235 if (dum->gadget.speed == USB_SPEED_SUPER)
236 return dum->ss_hcd;
237 else
238 return dum->hs_hcd;
239 }
240
241 static inline struct dummy *gadget_dev_to_dummy (struct device *dev)
242 {
243 return container_of (dev, struct dummy, gadget.dev);
244 }
245
246 static struct dummy the_controller;
247
248 /*-------------------------------------------------------------------------*/
249
250 /* SLAVE/GADGET SIDE UTILITY ROUTINES */
251
252 /* called with spinlock held */
253 static void nuke (struct dummy *dum, struct dummy_ep *ep)
254 {
255 while (!list_empty (&ep->queue)) {
256 struct dummy_request *req;
257
258 req = list_entry (ep->queue.next, struct dummy_request, queue);
259 list_del_init (&req->queue);
260 req->req.status = -ESHUTDOWN;
261
262 spin_unlock (&dum->lock);
263 req->req.complete (&ep->ep, &req->req);
264 spin_lock (&dum->lock);
265 }
266 }
267
268 /* caller must hold lock */
269 static void
270 stop_activity (struct dummy *dum)
271 {
272 struct dummy_ep *ep;
273
274 /* prevent any more requests */
275 dum->address = 0;
276
277 /* The timer is left running so that outstanding URBs can fail */
278
279 /* nuke any pending requests first, so driver i/o is quiesced */
280 list_for_each_entry (ep, &dum->gadget.ep_list, ep.ep_list)
281 nuke (dum, ep);
282
283 /* driver now does any non-usb quiescing necessary */
284 }
285
286 /**
287 * set_link_state_by_speed() - Sets the current state of the link according to
288 * the hcd speed
289 * @dum_hcd: pointer to the dummy_hcd structure to update the link state for
290 *
291 * This function updates the port_status according to the link state and the
292 * speed of the hcd.
293 */
294 static void set_link_state_by_speed(struct dummy_hcd *dum_hcd)
295 {
296 struct dummy *dum = dum_hcd->dum;
297
298 if (dummy_hcd_to_hcd(dum_hcd)->speed == HCD_USB3) {
299 if ((dum_hcd->port_status & USB_SS_PORT_STAT_POWER) == 0) {
300 dum_hcd->port_status = 0;
301 } else if (!dum->pullup || dum->udc_suspended) {
302 /* UDC suspend must cause a disconnect */
303 dum_hcd->port_status &= ~(USB_PORT_STAT_CONNECTION |
304 USB_PORT_STAT_ENABLE);
305 if ((dum_hcd->old_status &
306 USB_PORT_STAT_CONNECTION) != 0)
307 dum_hcd->port_status |=
308 (USB_PORT_STAT_C_CONNECTION << 16);
309 } else {
310 /* device is connected and not suspended */
311 dum_hcd->port_status |= (USB_PORT_STAT_CONNECTION |
312 USB_PORT_STAT_SPEED_5GBPS) ;
313 if ((dum_hcd->old_status &
314 USB_PORT_STAT_CONNECTION) == 0)
315 dum_hcd->port_status |=
316 (USB_PORT_STAT_C_CONNECTION << 16);
317 if ((dum_hcd->port_status &
318 USB_PORT_STAT_ENABLE) == 1 &&
319 (dum_hcd->port_status &
320 USB_SS_PORT_LS_U0) == 1 &&
321 dum_hcd->rh_state != DUMMY_RH_SUSPENDED)
322 dum_hcd->active = 1;
323 }
324 } else {
325 if ((dum_hcd->port_status & USB_PORT_STAT_POWER) == 0) {
326 dum_hcd->port_status = 0;
327 } else if (!dum->pullup || dum->udc_suspended) {
328 /* UDC suspend must cause a disconnect */
329 dum_hcd->port_status &= ~(USB_PORT_STAT_CONNECTION |
330 USB_PORT_STAT_ENABLE |
331 USB_PORT_STAT_LOW_SPEED |
332 USB_PORT_STAT_HIGH_SPEED |
333 USB_PORT_STAT_SUSPEND);
334 if ((dum_hcd->old_status &
335 USB_PORT_STAT_CONNECTION) != 0)
336 dum_hcd->port_status |=
337 (USB_PORT_STAT_C_CONNECTION << 16);
338 } else {
339 dum_hcd->port_status |= USB_PORT_STAT_CONNECTION;
340 if ((dum_hcd->old_status &
341 USB_PORT_STAT_CONNECTION) == 0)
342 dum_hcd->port_status |=
343 (USB_PORT_STAT_C_CONNECTION << 16);
344 if ((dum_hcd->port_status & USB_PORT_STAT_ENABLE) == 0)
345 dum_hcd->port_status &= ~USB_PORT_STAT_SUSPEND;
346 else if ((dum_hcd->port_status &
347 USB_PORT_STAT_SUSPEND) == 0 &&
348 dum_hcd->rh_state != DUMMY_RH_SUSPENDED)
349 dum_hcd->active = 1;
350 }
351 }
352 }
353
354 /* caller must hold lock */
355 static void set_link_state(struct dummy_hcd *dum_hcd)
356 {
357 struct dummy *dum = dum_hcd->dum;
358
359 dum_hcd->active = 0;
360 if (dum->pullup)
361 if ((dummy_hcd_to_hcd(dum_hcd)->speed == HCD_USB3 &&
362 dum->gadget.speed != USB_SPEED_SUPER) ||
363 (dummy_hcd_to_hcd(dum_hcd)->speed != HCD_USB3 &&
364 dum->gadget.speed == USB_SPEED_SUPER))
365 return;
366
367 set_link_state_by_speed(dum_hcd);
368
369 if ((dum_hcd->port_status & USB_PORT_STAT_ENABLE) == 0 ||
370 dum_hcd->active)
371 dum_hcd->resuming = 0;
372
373 /* if !connected or reset */
374 if ((dum_hcd->port_status & USB_PORT_STAT_CONNECTION) == 0 ||
375 (dum_hcd->port_status & USB_PORT_STAT_RESET) != 0) {
376 /*
377 * We're connected and not reset (reset occurred now),
378 * and driver attached - disconnect!
379 */
380 if ((dum_hcd->old_status & USB_PORT_STAT_CONNECTION) != 0 &&
381 (dum_hcd->old_status & USB_PORT_STAT_RESET) == 0 &&
382 dum->driver) {
383 stop_activity(dum);
384 spin_unlock(&dum->lock);
385 dum->driver->disconnect(&dum->gadget);
386 spin_lock(&dum->lock);
387 }
388 } else if (dum_hcd->active != dum_hcd->old_active) {
389 if (dum_hcd->old_active && dum->driver->suspend) {
390 spin_unlock(&dum->lock);
391 dum->driver->suspend(&dum->gadget);
392 spin_lock(&dum->lock);
393 } else if (!dum_hcd->old_active && dum->driver->resume) {
394 spin_unlock(&dum->lock);
395 dum->driver->resume(&dum->gadget);
396 spin_lock(&dum->lock);
397 }
398 }
399
400 dum_hcd->old_status = dum_hcd->port_status;
401 dum_hcd->old_active = dum_hcd->active;
402 }
403
404 /*-------------------------------------------------------------------------*/
405
406 /* SLAVE/GADGET SIDE DRIVER
407 *
408 * This only tracks gadget state. All the work is done when the host
409 * side tries some (emulated) i/o operation. Real device controller
410 * drivers would do real i/o using dma, fifos, irqs, timers, etc.
411 */
412
413 #define is_enabled(dum) \
414 (dum->port_status & USB_PORT_STAT_ENABLE)
415
416 static int
417 dummy_enable (struct usb_ep *_ep, const struct usb_endpoint_descriptor *desc)
418 {
419 struct dummy *dum;
420 struct dummy_hcd *dum_hcd;
421 struct dummy_ep *ep;
422 unsigned max;
423 int retval;
424
425 ep = usb_ep_to_dummy_ep (_ep);
426 if (!_ep || !desc || ep->desc || _ep->name == ep0name
427 || desc->bDescriptorType != USB_DT_ENDPOINT)
428 return -EINVAL;
429 dum = ep_to_dummy (ep);
430 if (!dum->driver)
431 return -ESHUTDOWN;
432
433 dum_hcd = gadget_to_dummy_hcd(&dum->gadget);
434 if (!is_enabled(dum_hcd))
435 return -ESHUTDOWN;
436
437 /*
438 * For HS/FS devices only bits 0..10 of the wMaxPacketSize represent the
439 * maximum packet size.
440 * For SS devices the wMaxPacketSize is limited by 1024.
441 */
442 max = le16_to_cpu(desc->wMaxPacketSize) & 0x7ff;
443
444 /* drivers must not request bad settings, since lower levels
445 * (hardware or its drivers) may not check. some endpoints
446 * can't do iso, many have maxpacket limitations, etc.
447 *
448 * since this "hardware" driver is here to help debugging, we
449 * have some extra sanity checks. (there could be more though,
450 * especially for "ep9out" style fixed function ones.)
451 */
452 retval = -EINVAL;
453 switch (desc->bmAttributes & 0x03) {
454 case USB_ENDPOINT_XFER_BULK:
455 if (strstr (ep->ep.name, "-iso")
456 || strstr (ep->ep.name, "-int")) {
457 goto done;
458 }
459 switch (dum->gadget.speed) {
460 case USB_SPEED_SUPER:
461 if (max == 1024)
462 break;
463 goto done;
464 case USB_SPEED_HIGH:
465 if (max == 512)
466 break;
467 goto done;
468 case USB_SPEED_FULL:
469 if (max == 8 || max == 16 || max == 32 || max == 64)
470 /* we'll fake any legal size */
471 break;
472 /* save a return statement */
473 default:
474 goto done;
475 }
476 break;
477 case USB_ENDPOINT_XFER_INT:
478 if (strstr (ep->ep.name, "-iso")) /* bulk is ok */
479 goto done;
480 /* real hardware might not handle all packet sizes */
481 switch (dum->gadget.speed) {
482 case USB_SPEED_SUPER:
483 case USB_SPEED_HIGH:
484 if (max <= 1024)
485 break;
486 /* save a return statement */
487 case USB_SPEED_FULL:
488 if (max <= 64)
489 break;
490 /* save a return statement */
491 default:
492 if (max <= 8)
493 break;
494 goto done;
495 }
496 break;
497 case USB_ENDPOINT_XFER_ISOC:
498 if (strstr (ep->ep.name, "-bulk")
499 || strstr (ep->ep.name, "-int"))
500 goto done;
501 /* real hardware might not handle all packet sizes */
502 switch (dum->gadget.speed) {
503 case USB_SPEED_SUPER:
504 case USB_SPEED_HIGH:
505 if (max <= 1024)
506 break;
507 /* save a return statement */
508 case USB_SPEED_FULL:
509 if (max <= 1023)
510 break;
511 /* save a return statement */
512 default:
513 goto done;
514 }
515 break;
516 default:
517 /* few chips support control except on ep0 */
518 goto done;
519 }
520
521 _ep->maxpacket = max;
522 ep->desc = desc;
523
524 dev_dbg (udc_dev(dum), "enabled %s (ep%d%s-%s) maxpacket %d\n",
525 _ep->name,
526 desc->bEndpointAddress & 0x0f,
527 (desc->bEndpointAddress & USB_DIR_IN) ? "in" : "out",
528 ({ char *val;
529 switch (desc->bmAttributes & 0x03) {
530 case USB_ENDPOINT_XFER_BULK:
531 val = "bulk";
532 break;
533 case USB_ENDPOINT_XFER_ISOC:
534 val = "iso";
535 break;
536 case USB_ENDPOINT_XFER_INT:
537 val = "intr";
538 break;
539 default:
540 val = "ctrl";
541 break;
542 }; val; }),
543 max);
544
545 /* at this point real hardware should be NAKing transfers
546 * to that endpoint, until a buffer is queued to it.
547 */
548 ep->halted = ep->wedged = 0;
549 retval = 0;
550 done:
551 return retval;
552 }
553
554 static int dummy_disable (struct usb_ep *_ep)
555 {
556 struct dummy_ep *ep;
557 struct dummy *dum;
558 unsigned long flags;
559 int retval;
560
561 ep = usb_ep_to_dummy_ep (_ep);
562 if (!_ep || !ep->desc || _ep->name == ep0name)
563 return -EINVAL;
564 dum = ep_to_dummy (ep);
565
566 spin_lock_irqsave (&dum->lock, flags);
567 ep->desc = NULL;
568 retval = 0;
569 nuke (dum, ep);
570 spin_unlock_irqrestore (&dum->lock, flags);
571
572 dev_dbg (udc_dev(dum), "disabled %s\n", _ep->name);
573 return retval;
574 }
575
576 static struct usb_request *
577 dummy_alloc_request (struct usb_ep *_ep, gfp_t mem_flags)
578 {
579 struct dummy_ep *ep;
580 struct dummy_request *req;
581
582 if (!_ep)
583 return NULL;
584 ep = usb_ep_to_dummy_ep (_ep);
585
586 req = kzalloc(sizeof(*req), mem_flags);
587 if (!req)
588 return NULL;
589 INIT_LIST_HEAD (&req->queue);
590 return &req->req;
591 }
592
593 static void
594 dummy_free_request (struct usb_ep *_ep, struct usb_request *_req)
595 {
596 struct dummy_ep *ep;
597 struct dummy_request *req;
598
599 ep = usb_ep_to_dummy_ep (_ep);
600 if (!ep || !_req || (!ep->desc && _ep->name != ep0name))
601 return;
602
603 req = usb_request_to_dummy_request (_req);
604 WARN_ON (!list_empty (&req->queue));
605 kfree (req);
606 }
607
608 static void
609 fifo_complete (struct usb_ep *ep, struct usb_request *req)
610 {
611 }
612
613 static int
614 dummy_queue (struct usb_ep *_ep, struct usb_request *_req,
615 gfp_t mem_flags)
616 {
617 struct dummy_ep *ep;
618 struct dummy_request *req;
619 struct dummy *dum;
620 struct dummy_hcd *dum_hcd;
621 unsigned long flags;
622
623 req = usb_request_to_dummy_request (_req);
624 if (!_req || !list_empty (&req->queue) || !_req->complete)
625 return -EINVAL;
626
627 ep = usb_ep_to_dummy_ep (_ep);
628 if (!_ep || (!ep->desc && _ep->name != ep0name))
629 return -EINVAL;
630
631 dum = ep_to_dummy (ep);
632 dum_hcd = gadget_to_dummy_hcd(&dum->gadget);
633 if (!dum->driver || !is_enabled(dum_hcd))
634 return -ESHUTDOWN;
635
636 #if 0
637 dev_dbg (udc_dev(dum), "ep %p queue req %p to %s, len %d buf %p\n",
638 ep, _req, _ep->name, _req->length, _req->buf);
639 #endif
640
641 _req->status = -EINPROGRESS;
642 _req->actual = 0;
643 spin_lock_irqsave (&dum->lock, flags);
644
645 /* implement an emulated single-request FIFO */
646 if (ep->desc && (ep->desc->bEndpointAddress & USB_DIR_IN) &&
647 list_empty (&dum->fifo_req.queue) &&
648 list_empty (&ep->queue) &&
649 _req->length <= FIFO_SIZE) {
650 req = &dum->fifo_req;
651 req->req = *_req;
652 req->req.buf = dum->fifo_buf;
653 memcpy (dum->fifo_buf, _req->buf, _req->length);
654 req->req.context = dum;
655 req->req.complete = fifo_complete;
656
657 list_add_tail(&req->queue, &ep->queue);
658 spin_unlock (&dum->lock);
659 _req->actual = _req->length;
660 _req->status = 0;
661 _req->complete (_ep, _req);
662 spin_lock (&dum->lock);
663 } else
664 list_add_tail(&req->queue, &ep->queue);
665 spin_unlock_irqrestore (&dum->lock, flags);
666
667 /* real hardware would likely enable transfers here, in case
668 * it'd been left NAKing.
669 */
670 return 0;
671 }
672
673 static int dummy_dequeue (struct usb_ep *_ep, struct usb_request *_req)
674 {
675 struct dummy_ep *ep;
676 struct dummy *dum;
677 int retval = -EINVAL;
678 unsigned long flags;
679 struct dummy_request *req = NULL;
680
681 if (!_ep || !_req)
682 return retval;
683 ep = usb_ep_to_dummy_ep (_ep);
684 dum = ep_to_dummy (ep);
685
686 if (!dum->driver)
687 return -ESHUTDOWN;
688
689 local_irq_save (flags);
690 spin_lock (&dum->lock);
691 list_for_each_entry (req, &ep->queue, queue) {
692 if (&req->req == _req) {
693 list_del_init (&req->queue);
694 _req->status = -ECONNRESET;
695 retval = 0;
696 break;
697 }
698 }
699 spin_unlock (&dum->lock);
700
701 if (retval == 0) {
702 dev_dbg (udc_dev(dum),
703 "dequeued req %p from %s, len %d buf %p\n",
704 req, _ep->name, _req->length, _req->buf);
705 _req->complete (_ep, _req);
706 }
707 local_irq_restore (flags);
708 return retval;
709 }
710
711 static int
712 dummy_set_halt_and_wedge(struct usb_ep *_ep, int value, int wedged)
713 {
714 struct dummy_ep *ep;
715 struct dummy *dum;
716
717 if (!_ep)
718 return -EINVAL;
719 ep = usb_ep_to_dummy_ep (_ep);
720 dum = ep_to_dummy (ep);
721 if (!dum->driver)
722 return -ESHUTDOWN;
723 if (!value)
724 ep->halted = ep->wedged = 0;
725 else if (ep->desc && (ep->desc->bEndpointAddress & USB_DIR_IN) &&
726 !list_empty (&ep->queue))
727 return -EAGAIN;
728 else {
729 ep->halted = 1;
730 if (wedged)
731 ep->wedged = 1;
732 }
733 /* FIXME clear emulated data toggle too */
734 return 0;
735 }
736
737 static int
738 dummy_set_halt(struct usb_ep *_ep, int value)
739 {
740 return dummy_set_halt_and_wedge(_ep, value, 0);
741 }
742
743 static int dummy_set_wedge(struct usb_ep *_ep)
744 {
745 if (!_ep || _ep->name == ep0name)
746 return -EINVAL;
747 return dummy_set_halt_and_wedge(_ep, 1, 1);
748 }
749
750 static const struct usb_ep_ops dummy_ep_ops = {
751 .enable = dummy_enable,
752 .disable = dummy_disable,
753
754 .alloc_request = dummy_alloc_request,
755 .free_request = dummy_free_request,
756
757 .queue = dummy_queue,
758 .dequeue = dummy_dequeue,
759
760 .set_halt = dummy_set_halt,
761 .set_wedge = dummy_set_wedge,
762 };
763
764 /*-------------------------------------------------------------------------*/
765
766 /* there are both host and device side versions of this call ... */
767 static int dummy_g_get_frame (struct usb_gadget *_gadget)
768 {
769 struct timeval tv;
770
771 do_gettimeofday (&tv);
772 return tv.tv_usec / 1000;
773 }
774
775 static int dummy_wakeup (struct usb_gadget *_gadget)
776 {
777 struct dummy_hcd *dum_hcd;
778
779 dum_hcd = gadget_to_dummy_hcd(_gadget);
780 if (!(dum_hcd->dum->devstatus & ((1 << USB_DEVICE_B_HNP_ENABLE)
781 | (1 << USB_DEVICE_REMOTE_WAKEUP))))
782 return -EINVAL;
783 if ((dum_hcd->port_status & USB_PORT_STAT_CONNECTION) == 0)
784 return -ENOLINK;
785 if ((dum_hcd->port_status & USB_PORT_STAT_SUSPEND) == 0 &&
786 dum_hcd->rh_state != DUMMY_RH_SUSPENDED)
787 return -EIO;
788
789 /* FIXME: What if the root hub is suspended but the port isn't? */
790
791 /* hub notices our request, issues downstream resume, etc */
792 dum_hcd->resuming = 1;
793 dum_hcd->re_timeout = jiffies + msecs_to_jiffies(20);
794 mod_timer(&dummy_hcd_to_hcd(dum_hcd)->rh_timer, dum_hcd->re_timeout);
795 return 0;
796 }
797
798 static int dummy_set_selfpowered (struct usb_gadget *_gadget, int value)
799 {
800 struct dummy *dum;
801
802 dum = (gadget_to_dummy_hcd(_gadget))->dum;
803 if (value)
804 dum->devstatus |= (1 << USB_DEVICE_SELF_POWERED);
805 else
806 dum->devstatus &= ~(1 << USB_DEVICE_SELF_POWERED);
807 return 0;
808 }
809
810 static int dummy_pullup (struct usb_gadget *_gadget, int value)
811 {
812 struct dummy_hcd *dum_hcd;
813 struct dummy *dum;
814 unsigned long flags;
815
816 dum_hcd = gadget_to_dummy_hcd(_gadget);
817 dum = dum_hcd->dum;
818
819 spin_lock_irqsave (&dum->lock, flags);
820 dum->pullup = (value != 0);
821 set_link_state(dum_hcd);
822 spin_unlock_irqrestore (&dum->lock, flags);
823 usb_hcd_poll_rh_status(dummy_hcd_to_hcd(dum_hcd));
824 return 0;
825 }
826
827 static int dummy_udc_start(struct usb_gadget_driver *driver,
828 int (*bind)(struct usb_gadget *));
829 static int dummy_udc_stop(struct usb_gadget_driver *driver);
830
831 static const struct usb_gadget_ops dummy_ops = {
832 .get_frame = dummy_g_get_frame,
833 .wakeup = dummy_wakeup,
834 .set_selfpowered = dummy_set_selfpowered,
835 .pullup = dummy_pullup,
836 .start = dummy_udc_start,
837 .stop = dummy_udc_stop,
838 };
839
840 /*-------------------------------------------------------------------------*/
841
842 /* "function" sysfs attribute */
843 static ssize_t
844 show_function (struct device *dev, struct device_attribute *attr, char *buf)
845 {
846 struct dummy *dum = gadget_dev_to_dummy (dev);
847
848 if (!dum->driver || !dum->driver->function)
849 return 0;
850 return scnprintf (buf, PAGE_SIZE, "%s\n", dum->driver->function);
851 }
852 static DEVICE_ATTR (function, S_IRUGO, show_function, NULL);
853
854 /*-------------------------------------------------------------------------*/
855
856 /*
857 * Driver registration/unregistration.
858 *
859 * This is basically hardware-specific; there's usually only one real USB
860 * device (not host) controller since that's how USB devices are intended
861 * to work. So most implementations of these api calls will rely on the
862 * fact that only one driver will ever bind to the hardware. But curious
863 * hardware can be built with discrete components, so the gadget API doesn't
864 * require that assumption.
865 *
866 * For this emulator, it might be convenient to create a usb slave device
867 * for each driver that registers: just add to a big root hub.
868 */
869
870 static int dummy_udc_start(struct usb_gadget_driver *driver,
871 int (*bind)(struct usb_gadget *))
872 {
873 struct dummy *dum = &the_controller;
874 int retval, i;
875
876 if (!dum)
877 return -EINVAL;
878 if (dum->driver)
879 return -EBUSY;
880 if (!bind || !driver->setup || driver->speed == USB_SPEED_UNKNOWN)
881 return -EINVAL;
882
883 /*
884 * SLAVE side init ... the layer above hardware, which
885 * can't enumerate without help from the driver we're binding.
886 */
887
888 dum->devstatus = 0;
889
890 INIT_LIST_HEAD (&dum->gadget.ep_list);
891 for (i = 0; i < DUMMY_ENDPOINTS; i++) {
892 struct dummy_ep *ep = &dum->ep [i];
893
894 if (!ep_name [i])
895 break;
896 ep->ep.name = ep_name [i];
897 ep->ep.ops = &dummy_ep_ops;
898 list_add_tail (&ep->ep.ep_list, &dum->gadget.ep_list);
899 ep->halted = ep->wedged = ep->already_seen =
900 ep->setup_stage = 0;
901 ep->ep.maxpacket = ~0;
902 ep->last_io = jiffies;
903 ep->gadget = &dum->gadget;
904 ep->desc = NULL;
905 INIT_LIST_HEAD (&ep->queue);
906 }
907
908 dum->gadget.ep0 = &dum->ep [0].ep;
909 if (mod_data.is_super_speed)
910 dum->gadget.speed = driver->speed;
911 else if (mod_data.is_high_speed)
912 dum->gadget.speed = min_t(u8, USB_SPEED_HIGH, driver->speed);
913 else
914 dum->gadget.speed = USB_SPEED_FULL;
915 if (dum->gadget.speed < driver->speed)
916 dev_dbg(udc_dev(dum), "This device can perform faster"
917 " if you connect it to a %s port...\n",
918 (driver->speed == USB_SPEED_SUPER ?
919 "SuperSpeed" : "HighSpeed"));
920
921 if (dum->gadget.speed == USB_SPEED_SUPER) {
922 for (i = 0; i < DUMMY_ENDPOINTS; i++)
923 dum->ep[i].ep.max_streams = 0x10;
924 dum->ep[0].ep.maxpacket = 9;
925 } else
926 dum->ep[0].ep.maxpacket = 64;
927
928 if (dum->gadget.speed == USB_SPEED_SUPER)
929 dum->gadget.is_otg =
930 (dummy_hcd_to_hcd(dum->ss_hcd)->self.otg_port != 0);
931 else
932 dum->gadget.is_otg =
933 (dummy_hcd_to_hcd(dum->hs_hcd)->self.otg_port != 0);
934
935 list_del_init (&dum->ep [0].ep.ep_list);
936 INIT_LIST_HEAD(&dum->fifo_req.queue);
937
938 driver->driver.bus = NULL;
939 dum->driver = driver;
940 dum->gadget.dev.driver = &driver->driver;
941 dev_dbg (udc_dev(dum), "binding gadget driver '%s'\n",
942 driver->driver.name);
943 retval = bind(&dum->gadget);
944 if (retval) {
945 dum->driver = NULL;
946 dum->gadget.dev.driver = NULL;
947 return retval;
948 }
949
950 /* khubd will enumerate this in a while */
951 dummy_pullup(&dum->gadget, 1);
952 return 0;
953 }
954
955 static int dummy_udc_stop(struct usb_gadget_driver *driver)
956 {
957 struct dummy *dum = &the_controller;
958
959 if (!dum)
960 return -ENODEV;
961 if (!driver || driver != dum->driver || !driver->unbind)
962 return -EINVAL;
963
964 dev_dbg (udc_dev(dum), "unregister gadget driver '%s'\n",
965 driver->driver.name);
966
967 dummy_pullup(&dum->gadget, 0);
968
969 driver->unbind (&dum->gadget);
970 dum->gadget.dev.driver = NULL;
971 dum->driver = NULL;
972
973 dummy_pullup(&dum->gadget, 0);
974 return 0;
975 }
976
977 #undef is_enabled
978
979 /* just declare this in any driver that really need it */
980 extern int net2280_set_fifo_mode (struct usb_gadget *gadget, int mode);
981
982 int net2280_set_fifo_mode (struct usb_gadget *gadget, int mode)
983 {
984 return -ENOSYS;
985 }
986 EXPORT_SYMBOL (net2280_set_fifo_mode);
987
988
989 /* The gadget structure is stored inside the hcd structure and will be
990 * released along with it. */
991 static void
992 dummy_gadget_release (struct device *dev)
993 {
994 return;
995 }
996
997 static int dummy_udc_probe (struct platform_device *pdev)
998 {
999 struct dummy *dum = &the_controller;
1000 int rc;
1001
1002 dum->gadget.name = gadget_name;
1003 dum->gadget.ops = &dummy_ops;
1004 dum->gadget.is_dualspeed = 1;
1005
1006 dev_set_name(&dum->gadget.dev, "gadget");
1007 dum->gadget.dev.parent = &pdev->dev;
1008 dum->gadget.dev.release = dummy_gadget_release;
1009 rc = device_register (&dum->gadget.dev);
1010 if (rc < 0) {
1011 put_device(&dum->gadget.dev);
1012 return rc;
1013 }
1014
1015 rc = usb_add_gadget_udc(&pdev->dev, &dum->gadget);
1016 if (rc < 0)
1017 goto err_udc;
1018
1019 rc = device_create_file (&dum->gadget.dev, &dev_attr_function);
1020 if (rc < 0)
1021 goto err_dev;
1022 platform_set_drvdata(pdev, dum);
1023 return rc;
1024
1025 err_dev:
1026 usb_del_gadget_udc(&dum->gadget);
1027 err_udc:
1028 device_unregister(&dum->gadget.dev);
1029 return rc;
1030 }
1031
1032 static int dummy_udc_remove (struct platform_device *pdev)
1033 {
1034 struct dummy *dum = platform_get_drvdata (pdev);
1035
1036 usb_del_gadget_udc(&dum->gadget);
1037 platform_set_drvdata (pdev, NULL);
1038 device_remove_file (&dum->gadget.dev, &dev_attr_function);
1039 device_unregister (&dum->gadget.dev);
1040 return 0;
1041 }
1042
1043 static int dummy_udc_suspend (struct platform_device *pdev, pm_message_t state)
1044 {
1045 struct dummy *dum = platform_get_drvdata(pdev);
1046 struct dummy_hcd *dum_hcd;
1047
1048 dev_dbg (&pdev->dev, "%s\n", __func__);
1049 dum_hcd = gadget_to_dummy_hcd(&dum->gadget);
1050 spin_lock_irq (&dum->lock);
1051 dum->udc_suspended = 1;
1052 set_link_state(dum_hcd);
1053 spin_unlock_irq (&dum->lock);
1054
1055 usb_hcd_poll_rh_status(dummy_hcd_to_hcd(dum_hcd));
1056 return 0;
1057 }
1058
1059 static int dummy_udc_resume (struct platform_device *pdev)
1060 {
1061 struct dummy *dum = platform_get_drvdata(pdev);
1062 struct dummy_hcd *dum_hcd;
1063
1064 dev_dbg (&pdev->dev, "%s\n", __func__);
1065 dum_hcd = gadget_to_dummy_hcd(&dum->gadget);
1066 spin_lock_irq (&dum->lock);
1067 dum->udc_suspended = 0;
1068 set_link_state(dum_hcd);
1069 spin_unlock_irq (&dum->lock);
1070
1071 usb_hcd_poll_rh_status(dummy_hcd_to_hcd(dum_hcd));
1072 return 0;
1073 }
1074
1075 static struct platform_driver dummy_udc_driver = {
1076 .probe = dummy_udc_probe,
1077 .remove = dummy_udc_remove,
1078 .suspend = dummy_udc_suspend,
1079 .resume = dummy_udc_resume,
1080 .driver = {
1081 .name = (char *) gadget_name,
1082 .owner = THIS_MODULE,
1083 },
1084 };
1085
1086 /*-------------------------------------------------------------------------*/
1087
1088 /* MASTER/HOST SIDE DRIVER
1089 *
1090 * this uses the hcd framework to hook up to host side drivers.
1091 * its root hub will only have one device, otherwise it acts like
1092 * a normal host controller.
1093 *
1094 * when urbs are queued, they're just stuck on a list that we
1095 * scan in a timer callback. that callback connects writes from
1096 * the host with reads from the device, and so on, based on the
1097 * usb 2.0 rules.
1098 */
1099
1100 static int dummy_urb_enqueue (
1101 struct usb_hcd *hcd,
1102 struct urb *urb,
1103 gfp_t mem_flags
1104 ) {
1105 struct dummy_hcd *dum_hcd;
1106 struct urbp *urbp;
1107 unsigned long flags;
1108 int rc;
1109
1110 if (!urb->transfer_buffer && urb->transfer_buffer_length)
1111 return -EINVAL;
1112
1113 urbp = kmalloc (sizeof *urbp, mem_flags);
1114 if (!urbp)
1115 return -ENOMEM;
1116 urbp->urb = urb;
1117
1118 dum_hcd = hcd_to_dummy_hcd(hcd);
1119 spin_lock_irqsave(&dum_hcd->dum->lock, flags);
1120 rc = usb_hcd_link_urb_to_ep(hcd, urb);
1121 if (rc) {
1122 kfree(urbp);
1123 goto done;
1124 }
1125
1126 if (!dum_hcd->udev) {
1127 dum_hcd->udev = urb->dev;
1128 usb_get_dev(dum_hcd->udev);
1129 } else if (unlikely(dum_hcd->udev != urb->dev))
1130 dev_err(dummy_dev(dum_hcd), "usb_device address has changed!\n");
1131
1132 list_add_tail(&urbp->urbp_list, &dum_hcd->urbp_list);
1133 urb->hcpriv = urbp;
1134 if (usb_pipetype (urb->pipe) == PIPE_CONTROL)
1135 urb->error_count = 1; /* mark as a new urb */
1136
1137 /* kick the scheduler, it'll do the rest */
1138 if (!timer_pending(&dum_hcd->timer))
1139 mod_timer(&dum_hcd->timer, jiffies + 1);
1140
1141 done:
1142 spin_unlock_irqrestore(&dum_hcd->dum->lock, flags);
1143 return rc;
1144 }
1145
1146 static int dummy_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status)
1147 {
1148 struct dummy_hcd *dum_hcd;
1149 unsigned long flags;
1150 int rc;
1151
1152 /* giveback happens automatically in timer callback,
1153 * so make sure the callback happens */
1154 dum_hcd = hcd_to_dummy_hcd(hcd);
1155 spin_lock_irqsave(&dum_hcd->dum->lock, flags);
1156
1157 rc = usb_hcd_check_unlink_urb(hcd, urb, status);
1158 if (!rc && dum_hcd->rh_state != DUMMY_RH_RUNNING &&
1159 !list_empty(&dum_hcd->urbp_list))
1160 mod_timer(&dum_hcd->timer, jiffies);
1161
1162 spin_unlock_irqrestore(&dum_hcd->dum->lock, flags);
1163 return rc;
1164 }
1165
1166 /* transfer up to a frame's worth; caller must own lock */
1167 static int
1168 transfer(struct dummy *dum, struct urb *urb, struct dummy_ep *ep, int limit,
1169 int *status)
1170 {
1171 struct dummy_request *req;
1172
1173 top:
1174 /* if there's no request queued, the device is NAKing; return */
1175 list_for_each_entry (req, &ep->queue, queue) {
1176 unsigned host_len, dev_len, len;
1177 int is_short, to_host;
1178 int rescan = 0;
1179
1180 /* 1..N packets of ep->ep.maxpacket each ... the last one
1181 * may be short (including zero length).
1182 *
1183 * writer can send a zlp explicitly (length 0) or implicitly
1184 * (length mod maxpacket zero, and 'zero' flag); they always
1185 * terminate reads.
1186 */
1187 host_len = urb->transfer_buffer_length - urb->actual_length;
1188 dev_len = req->req.length - req->req.actual;
1189 len = min (host_len, dev_len);
1190
1191 /* FIXME update emulated data toggle too */
1192
1193 to_host = usb_pipein (urb->pipe);
1194 if (unlikely (len == 0))
1195 is_short = 1;
1196 else {
1197 char *ubuf, *rbuf;
1198
1199 /* not enough bandwidth left? */
1200 if (limit < ep->ep.maxpacket && limit < len)
1201 break;
1202 len = min (len, (unsigned) limit);
1203 if (len == 0)
1204 break;
1205
1206 /* use an extra pass for the final short packet */
1207 if (len > ep->ep.maxpacket) {
1208 rescan = 1;
1209 len -= (len % ep->ep.maxpacket);
1210 }
1211 is_short = (len % ep->ep.maxpacket) != 0;
1212
1213 /* else transfer packet(s) */
1214 ubuf = urb->transfer_buffer + urb->actual_length;
1215 rbuf = req->req.buf + req->req.actual;
1216 if (to_host)
1217 memcpy (ubuf, rbuf, len);
1218 else
1219 memcpy (rbuf, ubuf, len);
1220 ep->last_io = jiffies;
1221
1222 limit -= len;
1223 urb->actual_length += len;
1224 req->req.actual += len;
1225 }
1226
1227 /* short packets terminate, maybe with overflow/underflow.
1228 * it's only really an error to write too much.
1229 *
1230 * partially filling a buffer optionally blocks queue advances
1231 * (so completion handlers can clean up the queue) but we don't
1232 * need to emulate such data-in-flight.
1233 */
1234 if (is_short) {
1235 if (host_len == dev_len) {
1236 req->req.status = 0;
1237 *status = 0;
1238 } else if (to_host) {
1239 req->req.status = 0;
1240 if (dev_len > host_len)
1241 *status = -EOVERFLOW;
1242 else
1243 *status = 0;
1244 } else if (!to_host) {
1245 *status = 0;
1246 if (host_len > dev_len)
1247 req->req.status = -EOVERFLOW;
1248 else
1249 req->req.status = 0;
1250 }
1251
1252 /* many requests terminate without a short packet */
1253 } else {
1254 if (req->req.length == req->req.actual
1255 && !req->req.zero)
1256 req->req.status = 0;
1257 if (urb->transfer_buffer_length == urb->actual_length
1258 && !(urb->transfer_flags
1259 & URB_ZERO_PACKET))
1260 *status = 0;
1261 }
1262
1263 /* device side completion --> continuable */
1264 if (req->req.status != -EINPROGRESS) {
1265 list_del_init (&req->queue);
1266
1267 spin_unlock (&dum->lock);
1268 req->req.complete (&ep->ep, &req->req);
1269 spin_lock (&dum->lock);
1270
1271 /* requests might have been unlinked... */
1272 rescan = 1;
1273 }
1274
1275 /* host side completion --> terminate */
1276 if (*status != -EINPROGRESS)
1277 break;
1278
1279 /* rescan to continue with any other queued i/o */
1280 if (rescan)
1281 goto top;
1282 }
1283 return limit;
1284 }
1285
1286 static int periodic_bytes (struct dummy *dum, struct dummy_ep *ep)
1287 {
1288 int limit = ep->ep.maxpacket;
1289
1290 if (dum->gadget.speed == USB_SPEED_HIGH) {
1291 int tmp;
1292
1293 /* high bandwidth mode */
1294 tmp = le16_to_cpu(ep->desc->wMaxPacketSize);
1295 tmp = (tmp >> 11) & 0x03;
1296 tmp *= 8 /* applies to entire frame */;
1297 limit += limit * tmp;
1298 }
1299 if (dum->gadget.speed == USB_SPEED_SUPER) {
1300 switch (ep->desc->bmAttributes & 0x03) {
1301 case USB_ENDPOINT_XFER_ISOC:
1302 /* Sec. 4.4.8.2 USB3.0 Spec */
1303 limit = 3 * 16 * 1024 * 8;
1304 break;
1305 case USB_ENDPOINT_XFER_INT:
1306 /* Sec. 4.4.7.2 USB3.0 Spec */
1307 limit = 3 * 1024 * 8;
1308 break;
1309 case USB_ENDPOINT_XFER_BULK:
1310 default:
1311 break;
1312 }
1313 }
1314 return limit;
1315 }
1316
1317 #define is_active(dum_hcd) ((dum_hcd->port_status & \
1318 (USB_PORT_STAT_CONNECTION | USB_PORT_STAT_ENABLE | \
1319 USB_PORT_STAT_SUSPEND)) \
1320 == (USB_PORT_STAT_CONNECTION | USB_PORT_STAT_ENABLE))
1321
1322 static struct dummy_ep *find_endpoint (struct dummy *dum, u8 address)
1323 {
1324 int i;
1325
1326 if (!is_active((dum->gadget.speed == USB_SPEED_SUPER ?
1327 dum->ss_hcd : dum->hs_hcd)))
1328 return NULL;
1329 if ((address & ~USB_DIR_IN) == 0)
1330 return &dum->ep [0];
1331 for (i = 1; i < DUMMY_ENDPOINTS; i++) {
1332 struct dummy_ep *ep = &dum->ep [i];
1333
1334 if (!ep->desc)
1335 continue;
1336 if (ep->desc->bEndpointAddress == address)
1337 return ep;
1338 }
1339 return NULL;
1340 }
1341
1342 #undef is_active
1343
1344 #define Dev_Request (USB_TYPE_STANDARD | USB_RECIP_DEVICE)
1345 #define Dev_InRequest (Dev_Request | USB_DIR_IN)
1346 #define Intf_Request (USB_TYPE_STANDARD | USB_RECIP_INTERFACE)
1347 #define Intf_InRequest (Intf_Request | USB_DIR_IN)
1348 #define Ep_Request (USB_TYPE_STANDARD | USB_RECIP_ENDPOINT)
1349 #define Ep_InRequest (Ep_Request | USB_DIR_IN)
1350
1351
1352 /**
1353 * handle_control_request() - handles all control transfers
1354 * @dum: pointer to dummy (the_controller)
1355 * @urb: the urb request to handle
1356 * @setup: pointer to the setup data for a USB device control
1357 * request
1358 * @status: pointer to request handling status
1359 *
1360 * Return 0 - if the request was handled
1361 * 1 - if the request wasn't handles
1362 * error code on error
1363 */
1364 static int handle_control_request(struct dummy_hcd *dum_hcd, struct urb *urb,
1365 struct usb_ctrlrequest *setup,
1366 int *status)
1367 {
1368 struct dummy_ep *ep2;
1369 struct dummy *dum = dum_hcd->dum;
1370 int ret_val = 1;
1371 unsigned w_index;
1372 unsigned w_value;
1373
1374 w_index = le16_to_cpu(setup->wIndex);
1375 w_value = le16_to_cpu(setup->wValue);
1376 switch (setup->bRequest) {
1377 case USB_REQ_SET_ADDRESS:
1378 if (setup->bRequestType != Dev_Request)
1379 break;
1380 dum->address = w_value;
1381 *status = 0;
1382 dev_dbg(udc_dev(dum), "set_address = %d\n",
1383 w_value);
1384 ret_val = 0;
1385 break;
1386 case USB_REQ_SET_FEATURE:
1387 if (setup->bRequestType == Dev_Request) {
1388 ret_val = 0;
1389 switch (w_value) {
1390 case USB_DEVICE_REMOTE_WAKEUP:
1391 break;
1392 case USB_DEVICE_B_HNP_ENABLE:
1393 dum->gadget.b_hnp_enable = 1;
1394 break;
1395 case USB_DEVICE_A_HNP_SUPPORT:
1396 dum->gadget.a_hnp_support = 1;
1397 break;
1398 case USB_DEVICE_A_ALT_HNP_SUPPORT:
1399 dum->gadget.a_alt_hnp_support = 1;
1400 break;
1401 case USB_DEVICE_U1_ENABLE:
1402 if (dummy_hcd_to_hcd(dum_hcd)->speed ==
1403 HCD_USB3)
1404 w_value = USB_DEV_STAT_U1_ENABLED;
1405 else
1406 ret_val = -EOPNOTSUPP;
1407 break;
1408 case USB_DEVICE_U2_ENABLE:
1409 if (dummy_hcd_to_hcd(dum_hcd)->speed ==
1410 HCD_USB3)
1411 w_value = USB_DEV_STAT_U2_ENABLED;
1412 else
1413 ret_val = -EOPNOTSUPP;
1414 break;
1415 case USB_DEVICE_LTM_ENABLE:
1416 if (dummy_hcd_to_hcd(dum_hcd)->speed ==
1417 HCD_USB3)
1418 w_value = USB_DEV_STAT_LTM_ENABLED;
1419 else
1420 ret_val = -EOPNOTSUPP;
1421 break;
1422 default:
1423 ret_val = -EOPNOTSUPP;
1424 }
1425 if (ret_val == 0) {
1426 dum->devstatus |= (1 << w_value);
1427 *status = 0;
1428 }
1429 } else if (setup->bRequestType == Ep_Request) {
1430 /* endpoint halt */
1431 ep2 = find_endpoint(dum, w_index);
1432 if (!ep2 || ep2->ep.name == ep0name) {
1433 ret_val = -EOPNOTSUPP;
1434 break;
1435 }
1436 ep2->halted = 1;
1437 ret_val = 0;
1438 *status = 0;
1439 }
1440 break;
1441 case USB_REQ_CLEAR_FEATURE:
1442 if (setup->bRequestType == Dev_Request) {
1443 ret_val = 0;
1444 switch (w_value) {
1445 case USB_DEVICE_REMOTE_WAKEUP:
1446 w_value = USB_DEVICE_REMOTE_WAKEUP;
1447 break;
1448 case USB_DEVICE_U1_ENABLE:
1449 if (dummy_hcd_to_hcd(dum_hcd)->speed ==
1450 HCD_USB3)
1451 w_value = USB_DEV_STAT_U1_ENABLED;
1452 else
1453 ret_val = -EOPNOTSUPP;
1454 break;
1455 case USB_DEVICE_U2_ENABLE:
1456 if (dummy_hcd_to_hcd(dum_hcd)->speed ==
1457 HCD_USB3)
1458 w_value = USB_DEV_STAT_U2_ENABLED;
1459 else
1460 ret_val = -EOPNOTSUPP;
1461 break;
1462 case USB_DEVICE_LTM_ENABLE:
1463 if (dummy_hcd_to_hcd(dum_hcd)->speed ==
1464 HCD_USB3)
1465 w_value = USB_DEV_STAT_LTM_ENABLED;
1466 else
1467 ret_val = -EOPNOTSUPP;
1468 break;
1469 default:
1470 ret_val = -EOPNOTSUPP;
1471 break;
1472 }
1473 if (ret_val == 0) {
1474 dum->devstatus &= ~(1 << w_value);
1475 *status = 0;
1476 }
1477 } else if (setup->bRequestType == Ep_Request) {
1478 /* endpoint halt */
1479 ep2 = find_endpoint(dum, w_index);
1480 if (!ep2) {
1481 ret_val = -EOPNOTSUPP;
1482 break;
1483 }
1484 if (!ep2->wedged)
1485 ep2->halted = 0;
1486 ret_val = 0;
1487 *status = 0;
1488 }
1489 break;
1490 case USB_REQ_GET_STATUS:
1491 if (setup->bRequestType == Dev_InRequest
1492 || setup->bRequestType == Intf_InRequest
1493 || setup->bRequestType == Ep_InRequest) {
1494 char *buf;
1495 /*
1496 * device: remote wakeup, selfpowered
1497 * interface: nothing
1498 * endpoint: halt
1499 */
1500 buf = (char *)urb->transfer_buffer;
1501 if (urb->transfer_buffer_length > 0) {
1502 if (setup->bRequestType == Ep_InRequest) {
1503 ep2 = find_endpoint(dum, w_index);
1504 if (!ep2) {
1505 ret_val = -EOPNOTSUPP;
1506 break;
1507 }
1508 buf[0] = ep2->halted;
1509 } else if (setup->bRequestType ==
1510 Dev_InRequest) {
1511 buf[0] = (u8)dum->devstatus;
1512 } else
1513 buf[0] = 0;
1514 }
1515 if (urb->transfer_buffer_length > 1)
1516 buf[1] = 0;
1517 urb->actual_length = min_t(u32, 2,
1518 urb->transfer_buffer_length);
1519 ret_val = 0;
1520 *status = 0;
1521 }
1522 break;
1523 }
1524 return ret_val;
1525 }
1526
1527 /* drive both sides of the transfers; looks like irq handlers to
1528 * both drivers except the callbacks aren't in_irq().
1529 */
1530 static void dummy_timer(unsigned long _dum_hcd)
1531 {
1532 struct dummy_hcd *dum_hcd = (struct dummy_hcd *) _dum_hcd;
1533 struct dummy *dum = dum_hcd->dum;
1534 struct urbp *urbp, *tmp;
1535 unsigned long flags;
1536 int limit, total;
1537 int i;
1538
1539 /* simplistic model for one frame's bandwidth */
1540 switch (dum->gadget.speed) {
1541 case USB_SPEED_LOW:
1542 total = 8/*bytes*/ * 12/*packets*/;
1543 break;
1544 case USB_SPEED_FULL:
1545 total = 64/*bytes*/ * 19/*packets*/;
1546 break;
1547 case USB_SPEED_HIGH:
1548 total = 512/*bytes*/ * 13/*packets*/ * 8/*uframes*/;
1549 break;
1550 case USB_SPEED_SUPER:
1551 /* Bus speed is 500000 bytes/ms, so use a little less */
1552 total = 490000;
1553 break;
1554 default:
1555 dev_err(dummy_dev(dum_hcd), "bogus device speed\n");
1556 return;
1557 }
1558
1559 /* FIXME if HZ != 1000 this will probably misbehave ... */
1560
1561 /* look at each urb queued by the host side driver */
1562 spin_lock_irqsave (&dum->lock, flags);
1563
1564 if (!dum_hcd->udev) {
1565 dev_err(dummy_dev(dum_hcd),
1566 "timer fired with no URBs pending?\n");
1567 spin_unlock_irqrestore (&dum->lock, flags);
1568 return;
1569 }
1570
1571 for (i = 0; i < DUMMY_ENDPOINTS; i++) {
1572 if (!ep_name [i])
1573 break;
1574 dum->ep [i].already_seen = 0;
1575 }
1576
1577 restart:
1578 list_for_each_entry_safe(urbp, tmp, &dum_hcd->urbp_list, urbp_list) {
1579 struct urb *urb;
1580 struct dummy_request *req;
1581 u8 address;
1582 struct dummy_ep *ep = NULL;
1583 int type;
1584 int status = -EINPROGRESS;
1585
1586 urb = urbp->urb;
1587 if (urb->unlinked)
1588 goto return_urb;
1589 else if (dum_hcd->rh_state != DUMMY_RH_RUNNING)
1590 continue;
1591 type = usb_pipetype (urb->pipe);
1592
1593 /* used up this frame's non-periodic bandwidth?
1594 * FIXME there's infinite bandwidth for control and
1595 * periodic transfers ... unrealistic.
1596 */
1597 if (total <= 0 && type == PIPE_BULK)
1598 continue;
1599
1600 /* find the gadget's ep for this request (if configured) */
1601 address = usb_pipeendpoint (urb->pipe);
1602 if (usb_pipein (urb->pipe))
1603 address |= USB_DIR_IN;
1604 ep = find_endpoint(dum, address);
1605 if (!ep) {
1606 /* set_configuration() disagreement */
1607 dev_dbg(dummy_dev(dum_hcd),
1608 "no ep configured for urb %p\n",
1609 urb);
1610 status = -EPROTO;
1611 goto return_urb;
1612 }
1613
1614 if (ep->already_seen)
1615 continue;
1616 ep->already_seen = 1;
1617 if (ep == &dum->ep [0] && urb->error_count) {
1618 ep->setup_stage = 1; /* a new urb */
1619 urb->error_count = 0;
1620 }
1621 if (ep->halted && !ep->setup_stage) {
1622 /* NOTE: must not be iso! */
1623 dev_dbg(dummy_dev(dum_hcd), "ep %s halted, urb %p\n",
1624 ep->ep.name, urb);
1625 status = -EPIPE;
1626 goto return_urb;
1627 }
1628 /* FIXME make sure both ends agree on maxpacket */
1629
1630 /* handle control requests */
1631 if (ep == &dum->ep [0] && ep->setup_stage) {
1632 struct usb_ctrlrequest setup;
1633 int value = 1;
1634
1635 setup = *(struct usb_ctrlrequest*) urb->setup_packet;
1636 /* paranoia, in case of stale queued data */
1637 list_for_each_entry (req, &ep->queue, queue) {
1638 list_del_init (&req->queue);
1639 req->req.status = -EOVERFLOW;
1640 dev_dbg (udc_dev(dum), "stale req = %p\n",
1641 req);
1642
1643 spin_unlock (&dum->lock);
1644 req->req.complete (&ep->ep, &req->req);
1645 spin_lock (&dum->lock);
1646 ep->already_seen = 0;
1647 goto restart;
1648 }
1649
1650 /* gadget driver never sees set_address or operations
1651 * on standard feature flags. some hardware doesn't
1652 * even expose them.
1653 */
1654 ep->last_io = jiffies;
1655 ep->setup_stage = 0;
1656 ep->halted = 0;
1657
1658 value = handle_control_request(dum_hcd, urb, &setup,
1659 &status);
1660
1661 /* gadget driver handles all other requests. block
1662 * until setup() returns; no reentrancy issues etc.
1663 */
1664 if (value > 0) {
1665 spin_unlock (&dum->lock);
1666 value = dum->driver->setup (&dum->gadget,
1667 &setup);
1668 spin_lock (&dum->lock);
1669
1670 if (value >= 0) {
1671 /* no delays (max 64KB data stage) */
1672 limit = 64*1024;
1673 goto treat_control_like_bulk;
1674 }
1675 /* error, see below */
1676 }
1677
1678 if (value < 0) {
1679 if (value != -EOPNOTSUPP)
1680 dev_dbg (udc_dev(dum),
1681 "setup --> %d\n",
1682 value);
1683 status = -EPIPE;
1684 urb->actual_length = 0;
1685 }
1686
1687 goto return_urb;
1688 }
1689
1690 /* non-control requests */
1691 limit = total;
1692 switch (usb_pipetype (urb->pipe)) {
1693 case PIPE_ISOCHRONOUS:
1694 /* FIXME is it urb->interval since the last xfer?
1695 * use urb->iso_frame_desc[i].
1696 * complete whether or not ep has requests queued.
1697 * report random errors, to debug drivers.
1698 */
1699 limit = max (limit, periodic_bytes (dum, ep));
1700 status = -ENOSYS;
1701 break;
1702
1703 case PIPE_INTERRUPT:
1704 /* FIXME is it urb->interval since the last xfer?
1705 * this almost certainly polls too fast.
1706 */
1707 limit = max (limit, periodic_bytes (dum, ep));
1708 /* FALLTHROUGH */
1709
1710 // case PIPE_BULK: case PIPE_CONTROL:
1711 default:
1712 treat_control_like_bulk:
1713 ep->last_io = jiffies;
1714 total = transfer(dum, urb, ep, limit, &status);
1715 break;
1716 }
1717
1718 /* incomplete transfer? */
1719 if (status == -EINPROGRESS)
1720 continue;
1721
1722 return_urb:
1723 list_del (&urbp->urbp_list);
1724 kfree (urbp);
1725 if (ep)
1726 ep->already_seen = ep->setup_stage = 0;
1727
1728 usb_hcd_unlink_urb_from_ep(dummy_hcd_to_hcd(dum_hcd), urb);
1729 spin_unlock (&dum->lock);
1730 usb_hcd_giveback_urb(dummy_hcd_to_hcd(dum_hcd), urb, status);
1731 spin_lock (&dum->lock);
1732
1733 goto restart;
1734 }
1735
1736 if (list_empty(&dum_hcd->urbp_list)) {
1737 usb_put_dev(dum_hcd->udev);
1738 dum_hcd->udev = NULL;
1739 } else if (dum_hcd->rh_state == DUMMY_RH_RUNNING) {
1740 /* want a 1 msec delay here */
1741 mod_timer(&dum_hcd->timer, jiffies + msecs_to_jiffies(1));
1742 }
1743
1744 spin_unlock_irqrestore (&dum->lock, flags);
1745 }
1746
1747 /*-------------------------------------------------------------------------*/
1748
1749 #define PORT_C_MASK \
1750 ((USB_PORT_STAT_C_CONNECTION \
1751 | USB_PORT_STAT_C_ENABLE \
1752 | USB_PORT_STAT_C_SUSPEND \
1753 | USB_PORT_STAT_C_OVERCURRENT \
1754 | USB_PORT_STAT_C_RESET) << 16)
1755
1756 static int dummy_hub_status (struct usb_hcd *hcd, char *buf)
1757 {
1758 struct dummy_hcd *dum_hcd;
1759 unsigned long flags;
1760 int retval = 0;
1761
1762 dum_hcd = hcd_to_dummy_hcd(hcd);
1763
1764 spin_lock_irqsave(&dum_hcd->dum->lock, flags);
1765 if (!HCD_HW_ACCESSIBLE(hcd))
1766 goto done;
1767
1768 if (dum_hcd->resuming && time_after_eq(jiffies, dum_hcd->re_timeout)) {
1769 dum_hcd->port_status |= (USB_PORT_STAT_C_SUSPEND << 16);
1770 dum_hcd->port_status &= ~USB_PORT_STAT_SUSPEND;
1771 set_link_state(dum_hcd);
1772 }
1773
1774 if ((dum_hcd->port_status & PORT_C_MASK) != 0) {
1775 *buf = (1 << 1);
1776 dev_dbg(dummy_dev(dum_hcd), "port status 0x%08x has changes\n",
1777 dum_hcd->port_status);
1778 retval = 1;
1779 if (dum_hcd->rh_state == DUMMY_RH_SUSPENDED)
1780 usb_hcd_resume_root_hub (hcd);
1781 }
1782 done:
1783 spin_unlock_irqrestore(&dum_hcd->dum->lock, flags);
1784 return retval;
1785 }
1786
1787 static inline void
1788 ss_hub_descriptor(struct usb_hub_descriptor *desc)
1789 {
1790 memset(desc, 0, sizeof *desc);
1791 desc->bDescriptorType = 0x2a;
1792 desc->bDescLength = 12;
1793 desc->wHubCharacteristics = cpu_to_le16(0x0001);
1794 desc->bNbrPorts = 1;
1795 desc->u.ss.bHubHdrDecLat = 0x04; /* Worst case: 0.4 micro sec*/
1796 desc->u.ss.DeviceRemovable = 0xffff;
1797 }
1798
1799 static inline void
1800 hub_descriptor (struct usb_hub_descriptor *desc)
1801 {
1802 memset (desc, 0, sizeof *desc);
1803 desc->bDescriptorType = 0x29;
1804 desc->bDescLength = 9;
1805 desc->wHubCharacteristics = cpu_to_le16(0x0001);
1806 desc->bNbrPorts = 1;
1807 desc->u.hs.DeviceRemovable[0] = 0xff;
1808 desc->u.hs.DeviceRemovable[1] = 0xff;
1809 }
1810
1811 static int dummy_hub_control (
1812 struct usb_hcd *hcd,
1813 u16 typeReq,
1814 u16 wValue,
1815 u16 wIndex,
1816 char *buf,
1817 u16 wLength
1818 ) {
1819 struct dummy_hcd *dum_hcd;
1820 int retval = 0;
1821 unsigned long flags;
1822
1823 if (!HCD_HW_ACCESSIBLE(hcd))
1824 return -ETIMEDOUT;
1825
1826 dum_hcd = hcd_to_dummy_hcd(hcd);
1827
1828 spin_lock_irqsave(&dum_hcd->dum->lock, flags);
1829 switch (typeReq) {
1830 case ClearHubFeature:
1831 break;
1832 case ClearPortFeature:
1833 switch (wValue) {
1834 case USB_PORT_FEAT_SUSPEND:
1835 if (hcd->speed == HCD_USB3) {
1836 dev_dbg(dummy_dev(dum_hcd),
1837 "USB_PORT_FEAT_SUSPEND req not "
1838 "supported for USB 3.0 roothub\n");
1839 goto error;
1840 }
1841 if (dum_hcd->port_status & USB_PORT_STAT_SUSPEND) {
1842 /* 20msec resume signaling */
1843 dum_hcd->resuming = 1;
1844 dum_hcd->re_timeout = jiffies +
1845 msecs_to_jiffies(20);
1846 }
1847 break;
1848 case USB_PORT_FEAT_POWER:
1849 if (hcd->speed == HCD_USB3) {
1850 if (dum_hcd->port_status & USB_PORT_STAT_POWER)
1851 dev_dbg(dummy_dev(dum_hcd),
1852 "power-off\n");
1853 } else
1854 if (dum_hcd->port_status &
1855 USB_SS_PORT_STAT_POWER)
1856 dev_dbg(dummy_dev(dum_hcd),
1857 "power-off\n");
1858 /* FALLS THROUGH */
1859 default:
1860 dum_hcd->port_status &= ~(1 << wValue);
1861 set_link_state(dum_hcd);
1862 }
1863 break;
1864 case GetHubDescriptor:
1865 if (hcd->speed == HCD_USB3 &&
1866 (wLength < USB_DT_SS_HUB_SIZE ||
1867 wValue != (USB_DT_SS_HUB << 8))) {
1868 dev_dbg(dummy_dev(dum_hcd),
1869 "Wrong hub descriptor type for "
1870 "USB 3.0 roothub.\n");
1871 goto error;
1872 }
1873 if (hcd->speed == HCD_USB3)
1874 ss_hub_descriptor((struct usb_hub_descriptor *) buf);
1875 else
1876 hub_descriptor((struct usb_hub_descriptor *) buf);
1877 break;
1878 case GetHubStatus:
1879 *(__le32 *) buf = cpu_to_le32 (0);
1880 break;
1881 case GetPortStatus:
1882 if (wIndex != 1)
1883 retval = -EPIPE;
1884
1885 /* whoever resets or resumes must GetPortStatus to
1886 * complete it!!
1887 */
1888 if (dum_hcd->resuming &&
1889 time_after_eq(jiffies, dum_hcd->re_timeout)) {
1890 dum_hcd->port_status |= (USB_PORT_STAT_C_SUSPEND << 16);
1891 dum_hcd->port_status &= ~USB_PORT_STAT_SUSPEND;
1892 }
1893 if ((dum_hcd->port_status & USB_PORT_STAT_RESET) != 0 &&
1894 time_after_eq(jiffies, dum_hcd->re_timeout)) {
1895 dum_hcd->port_status |= (USB_PORT_STAT_C_RESET << 16);
1896 dum_hcd->port_status &= ~USB_PORT_STAT_RESET;
1897 if (dum_hcd->dum->pullup) {
1898 dum_hcd->port_status |= USB_PORT_STAT_ENABLE;
1899
1900 if (hcd->speed < HCD_USB3) {
1901 switch (dum_hcd->dum->gadget.speed) {
1902 case USB_SPEED_HIGH:
1903 dum_hcd->port_status |=
1904 USB_PORT_STAT_HIGH_SPEED;
1905 break;
1906 case USB_SPEED_LOW:
1907 dum_hcd->dum->gadget.ep0->
1908 maxpacket = 8;
1909 dum_hcd->port_status |=
1910 USB_PORT_STAT_LOW_SPEED;
1911 break;
1912 default:
1913 dum_hcd->dum->gadget.speed =
1914 USB_SPEED_FULL;
1915 break;
1916 }
1917 }
1918 }
1919 }
1920 set_link_state(dum_hcd);
1921 ((__le16 *) buf)[0] = cpu_to_le16 (dum_hcd->port_status);
1922 ((__le16 *) buf)[1] = cpu_to_le16 (dum_hcd->port_status >> 16);
1923 break;
1924 case SetHubFeature:
1925 retval = -EPIPE;
1926 break;
1927 case SetPortFeature:
1928 switch (wValue) {
1929 case USB_PORT_FEAT_LINK_STATE:
1930 if (hcd->speed != HCD_USB3) {
1931 dev_dbg(dummy_dev(dum_hcd),
1932 "USB_PORT_FEAT_LINK_STATE req not "
1933 "supported for USB 2.0 roothub\n");
1934 goto error;
1935 }
1936 /*
1937 * Since this is dummy we don't have an actual link so
1938 * there is nothing to do for the SET_LINK_STATE cmd
1939 */
1940 break;
1941 case USB_PORT_FEAT_U1_TIMEOUT:
1942 case USB_PORT_FEAT_U2_TIMEOUT:
1943 /* TODO: add suspend/resume support! */
1944 if (hcd->speed != HCD_USB3) {
1945 dev_dbg(dummy_dev(dum_hcd),
1946 "USB_PORT_FEAT_U1/2_TIMEOUT req not "
1947 "supported for USB 2.0 roothub\n");
1948 goto error;
1949 }
1950 break;
1951 case USB_PORT_FEAT_SUSPEND:
1952 /* Applicable only for USB2.0 hub */
1953 if (hcd->speed == HCD_USB3) {
1954 dev_dbg(dummy_dev(dum_hcd),
1955 "USB_PORT_FEAT_SUSPEND req not "
1956 "supported for USB 3.0 roothub\n");
1957 goto error;
1958 }
1959 if (dum_hcd->active) {
1960 dum_hcd->port_status |= USB_PORT_STAT_SUSPEND;
1961
1962 /* HNP would happen here; for now we
1963 * assume b_bus_req is always true.
1964 */
1965 set_link_state(dum_hcd);
1966 if (((1 << USB_DEVICE_B_HNP_ENABLE)
1967 & dum_hcd->dum->devstatus) != 0)
1968 dev_dbg(dummy_dev(dum_hcd),
1969 "no HNP yet!\n");
1970 }
1971 break;
1972 case USB_PORT_FEAT_POWER:
1973 if (hcd->speed == HCD_USB3)
1974 dum_hcd->port_status |= USB_SS_PORT_STAT_POWER;
1975 else
1976 dum_hcd->port_status |= USB_PORT_STAT_POWER;
1977 set_link_state(dum_hcd);
1978 break;
1979 case USB_PORT_FEAT_BH_PORT_RESET:
1980 /* Applicable only for USB3.0 hub */
1981 if (hcd->speed != HCD_USB3) {
1982 dev_dbg(dummy_dev(dum_hcd),
1983 "USB_PORT_FEAT_BH_PORT_RESET req not "
1984 "supported for USB 2.0 roothub\n");
1985 goto error;
1986 }
1987 /* FALLS THROUGH */
1988 case USB_PORT_FEAT_RESET:
1989 /* if it's already enabled, disable */
1990 if (hcd->speed == HCD_USB3) {
1991 dum_hcd->port_status = 0;
1992 dum_hcd->port_status =
1993 (USB_SS_PORT_STAT_POWER |
1994 USB_PORT_STAT_CONNECTION |
1995 USB_PORT_STAT_RESET);
1996 } else
1997 dum_hcd->port_status &= ~(USB_PORT_STAT_ENABLE
1998 | USB_PORT_STAT_LOW_SPEED
1999 | USB_PORT_STAT_HIGH_SPEED);
2000 /*
2001 * We want to reset device status. All but the
2002 * Self powered feature
2003 */
2004 dum_hcd->dum->devstatus &=
2005 (1 << USB_DEVICE_SELF_POWERED);
2006 /*
2007 * FIXME USB3.0: what is the correct reset signaling
2008 * interval? Is it still 50msec as for HS?
2009 */
2010 dum_hcd->re_timeout = jiffies + msecs_to_jiffies(50);
2011 /* FALLS THROUGH */
2012 default:
2013 if (hcd->speed == HCD_USB3) {
2014 if ((dum_hcd->port_status &
2015 USB_SS_PORT_STAT_POWER) != 0) {
2016 dum_hcd->port_status |= (1 << wValue);
2017 set_link_state(dum_hcd);
2018 }
2019 } else
2020 if ((dum_hcd->port_status &
2021 USB_PORT_STAT_POWER) != 0) {
2022 dum_hcd->port_status |= (1 << wValue);
2023 set_link_state(dum_hcd);
2024 }
2025 }
2026 break;
2027 case GetPortErrorCount:
2028 if (hcd->speed != HCD_USB3) {
2029 dev_dbg(dummy_dev(dum_hcd),
2030 "GetPortErrorCount req not "
2031 "supported for USB 2.0 roothub\n");
2032 goto error;
2033 }
2034 /* We'll always return 0 since this is a dummy hub */
2035 *(__le32 *) buf = cpu_to_le32(0);
2036 break;
2037 case SetHubDepth:
2038 if (hcd->speed != HCD_USB3) {
2039 dev_dbg(dummy_dev(dum_hcd),
2040 "SetHubDepth req not supported for "
2041 "USB 2.0 roothub\n");
2042 goto error;
2043 }
2044 break;
2045 default:
2046 dev_dbg(dummy_dev(dum_hcd),
2047 "hub control req%04x v%04x i%04x l%d\n",
2048 typeReq, wValue, wIndex, wLength);
2049 error:
2050 /* "protocol stall" on error */
2051 retval = -EPIPE;
2052 }
2053 spin_unlock_irqrestore(&dum_hcd->dum->lock, flags);
2054
2055 if ((dum_hcd->port_status & PORT_C_MASK) != 0)
2056 usb_hcd_poll_rh_status (hcd);
2057 return retval;
2058 }
2059
2060 static int dummy_bus_suspend (struct usb_hcd *hcd)
2061 {
2062 struct dummy_hcd *dum_hcd = hcd_to_dummy_hcd(hcd);
2063
2064 dev_dbg (&hcd->self.root_hub->dev, "%s\n", __func__);
2065
2066 spin_lock_irq(&dum_hcd->dum->lock);
2067 dum_hcd->rh_state = DUMMY_RH_SUSPENDED;
2068 set_link_state(dum_hcd);
2069 hcd->state = HC_STATE_SUSPENDED;
2070 spin_unlock_irq(&dum_hcd->dum->lock);
2071 return 0;
2072 }
2073
2074 static int dummy_bus_resume (struct usb_hcd *hcd)
2075 {
2076 struct dummy_hcd *dum_hcd = hcd_to_dummy_hcd(hcd);
2077 int rc = 0;
2078
2079 dev_dbg (&hcd->self.root_hub->dev, "%s\n", __func__);
2080
2081 spin_lock_irq(&dum_hcd->dum->lock);
2082 if (!HCD_HW_ACCESSIBLE(hcd)) {
2083 rc = -ESHUTDOWN;
2084 } else {
2085 dum_hcd->rh_state = DUMMY_RH_RUNNING;
2086 set_link_state(dum_hcd);
2087 if (!list_empty(&dum_hcd->urbp_list))
2088 mod_timer(&dum_hcd->timer, jiffies);
2089 hcd->state = HC_STATE_RUNNING;
2090 }
2091 spin_unlock_irq(&dum_hcd->dum->lock);
2092 return rc;
2093 }
2094
2095 /*-------------------------------------------------------------------------*/
2096
2097 static inline ssize_t
2098 show_urb (char *buf, size_t size, struct urb *urb)
2099 {
2100 int ep = usb_pipeendpoint (urb->pipe);
2101
2102 return snprintf (buf, size,
2103 "urb/%p %s ep%d%s%s len %d/%d\n",
2104 urb,
2105 ({ char *s;
2106 switch (urb->dev->speed) {
2107 case USB_SPEED_LOW:
2108 s = "ls";
2109 break;
2110 case USB_SPEED_FULL:
2111 s = "fs";
2112 break;
2113 case USB_SPEED_HIGH:
2114 s = "hs";
2115 break;
2116 case USB_SPEED_SUPER:
2117 s = "ss";
2118 break;
2119 default:
2120 s = "?";
2121 break;
2122 }; s; }),
2123 ep, ep ? (usb_pipein (urb->pipe) ? "in" : "out") : "",
2124 ({ char *s; \
2125 switch (usb_pipetype (urb->pipe)) { \
2126 case PIPE_CONTROL: \
2127 s = ""; \
2128 break; \
2129 case PIPE_BULK: \
2130 s = "-bulk"; \
2131 break; \
2132 case PIPE_INTERRUPT: \
2133 s = "-int"; \
2134 break; \
2135 default: \
2136 s = "-iso"; \
2137 break; \
2138 }; s;}),
2139 urb->actual_length, urb->transfer_buffer_length);
2140 }
2141
2142 static ssize_t
2143 show_urbs (struct device *dev, struct device_attribute *attr, char *buf)
2144 {
2145 struct usb_hcd *hcd = dev_get_drvdata (dev);
2146 struct dummy_hcd *dum_hcd = hcd_to_dummy_hcd(hcd);
2147 struct urbp *urbp;
2148 size_t size = 0;
2149 unsigned long flags;
2150
2151 spin_lock_irqsave(&dum_hcd->dum->lock, flags);
2152 list_for_each_entry(urbp, &dum_hcd->urbp_list, urbp_list) {
2153 size_t temp;
2154
2155 temp = show_urb (buf, PAGE_SIZE - size, urbp->urb);
2156 buf += temp;
2157 size += temp;
2158 }
2159 spin_unlock_irqrestore(&dum_hcd->dum->lock, flags);
2160
2161 return size;
2162 }
2163 static DEVICE_ATTR (urbs, S_IRUGO, show_urbs, NULL);
2164
2165 static int dummy_start_ss(struct dummy_hcd *dum_hcd)
2166 {
2167 init_timer(&dum_hcd->timer);
2168 dum_hcd->timer.function = dummy_timer;
2169 dum_hcd->timer.data = (unsigned long)dum_hcd;
2170 dum_hcd->rh_state = DUMMY_RH_RUNNING;
2171 INIT_LIST_HEAD(&dum_hcd->urbp_list);
2172 dummy_hcd_to_hcd(dum_hcd)->power_budget = POWER_BUDGET;
2173 dummy_hcd_to_hcd(dum_hcd)->state = HC_STATE_RUNNING;
2174 dummy_hcd_to_hcd(dum_hcd)->uses_new_polling = 1;
2175 #ifdef CONFIG_USB_OTG
2176 dummy_hcd_to_hcd(dum_hcd)->self.otg_port = 1;
2177 #endif
2178 return 0;
2179
2180 /* FIXME 'urbs' should be a per-device thing, maybe in usbcore */
2181 return device_create_file(dummy_dev(dum_hcd), &dev_attr_urbs);
2182 }
2183
2184 static int dummy_start(struct usb_hcd *hcd)
2185 {
2186 struct dummy_hcd *dum_hcd = hcd_to_dummy_hcd(hcd);
2187
2188 /*
2189 * MASTER side init ... we emulate a root hub that'll only ever
2190 * talk to one device (the slave side). Also appears in sysfs,
2191 * just like more familiar pci-based HCDs.
2192 */
2193 if (!usb_hcd_is_primary_hcd(hcd))
2194 return dummy_start_ss(dum_hcd);
2195
2196 spin_lock_init(&dum_hcd->dum->lock);
2197 init_timer(&dum_hcd->timer);
2198 dum_hcd->timer.function = dummy_timer;
2199 dum_hcd->timer.data = (unsigned long)dum_hcd;
2200 dum_hcd->rh_state = DUMMY_RH_RUNNING;
2201
2202 INIT_LIST_HEAD(&dum_hcd->urbp_list);
2203
2204 hcd->power_budget = POWER_BUDGET;
2205 hcd->state = HC_STATE_RUNNING;
2206 hcd->uses_new_polling = 1;
2207
2208 #ifdef CONFIG_USB_OTG
2209 hcd->self.otg_port = 1;
2210 #endif
2211
2212 /* FIXME 'urbs' should be a per-device thing, maybe in usbcore */
2213 return device_create_file(dummy_dev(dum_hcd), &dev_attr_urbs);
2214 }
2215
2216 static void dummy_stop (struct usb_hcd *hcd)
2217 {
2218 struct dummy *dum;
2219
2220 dum = (hcd_to_dummy_hcd(hcd))->dum;
2221 device_remove_file(dummy_dev(hcd_to_dummy_hcd(hcd)), &dev_attr_urbs);
2222 usb_gadget_unregister_driver(dum->driver);
2223 dev_info(dummy_dev(hcd_to_dummy_hcd(hcd)), "stopped\n");
2224 }
2225
2226 /*-------------------------------------------------------------------------*/
2227
2228 static int dummy_h_get_frame (struct usb_hcd *hcd)
2229 {
2230 return dummy_g_get_frame (NULL);
2231 }
2232
2233 static int dummy_setup(struct usb_hcd *hcd)
2234 {
2235 if (usb_hcd_is_primary_hcd(hcd)) {
2236 the_controller.hs_hcd = hcd_to_dummy_hcd(hcd);
2237 the_controller.hs_hcd->dum = &the_controller;
2238 /*
2239 * Mark the first roothub as being USB 2.0.
2240 * The USB 3.0 roothub will be registered later by
2241 * dummy_hcd_probe()
2242 */
2243 hcd->speed = HCD_USB2;
2244 hcd->self.root_hub->speed = USB_SPEED_HIGH;
2245 } else {
2246 the_controller.ss_hcd = hcd_to_dummy_hcd(hcd);
2247 the_controller.ss_hcd->dum = &the_controller;
2248 hcd->speed = HCD_USB3;
2249 hcd->self.root_hub->speed = USB_SPEED_SUPER;
2250 }
2251 return 0;
2252 }
2253
2254 /* Change a group of bulk endpoints to support multiple stream IDs */
2255 int dummy_alloc_streams(struct usb_hcd *hcd, struct usb_device *udev,
2256 struct usb_host_endpoint **eps, unsigned int num_eps,
2257 unsigned int num_streams, gfp_t mem_flags)
2258 {
2259 if (hcd->speed != HCD_USB3)
2260 dev_dbg(dummy_dev(hcd_to_dummy_hcd(hcd)),
2261 "%s() - ERROR! Not supported for USB2.0 roothub\n",
2262 __func__);
2263 return 0;
2264 }
2265
2266 /* Reverts a group of bulk endpoints back to not using stream IDs. */
2267 int dummy_free_streams(struct usb_hcd *hcd, struct usb_device *udev,
2268 struct usb_host_endpoint **eps, unsigned int num_eps,
2269 gfp_t mem_flags)
2270 {
2271 if (hcd->speed != HCD_USB3)
2272 dev_dbg(dummy_dev(hcd_to_dummy_hcd(hcd)),
2273 "%s() - ERROR! Not supported for USB2.0 roothub\n",
2274 __func__);
2275 return 0;
2276 }
2277
2278 static struct hc_driver dummy_hcd = {
2279 .description = (char *) driver_name,
2280 .product_desc = "Dummy host controller",
2281 .hcd_priv_size = sizeof(struct dummy_hcd),
2282
2283 .flags = HCD_USB3 | HCD_SHARED,
2284
2285 .reset = dummy_setup,
2286 .start = dummy_start,
2287 .stop = dummy_stop,
2288
2289 .urb_enqueue = dummy_urb_enqueue,
2290 .urb_dequeue = dummy_urb_dequeue,
2291
2292 .get_frame_number = dummy_h_get_frame,
2293
2294 .hub_status_data = dummy_hub_status,
2295 .hub_control = dummy_hub_control,
2296 .bus_suspend = dummy_bus_suspend,
2297 .bus_resume = dummy_bus_resume,
2298
2299 .alloc_streams = dummy_alloc_streams,
2300 .free_streams = dummy_free_streams,
2301 };
2302
2303 static int dummy_hcd_probe(struct platform_device *pdev)
2304 {
2305 struct usb_hcd *hs_hcd;
2306 struct usb_hcd *ss_hcd;
2307 int retval;
2308
2309 dev_info(&pdev->dev, "%s, driver " DRIVER_VERSION "\n", driver_desc);
2310
2311 if (!mod_data.is_super_speed)
2312 dummy_hcd.flags = HCD_USB2;
2313 hs_hcd = usb_create_hcd(&dummy_hcd, &pdev->dev, dev_name(&pdev->dev));
2314 if (!hs_hcd)
2315 return -ENOMEM;
2316 hs_hcd->has_tt = 1;
2317
2318 retval = usb_add_hcd(hs_hcd, 0, 0);
2319 if (retval != 0) {
2320 usb_put_hcd(hs_hcd);
2321 return retval;
2322 }
2323
2324 if (mod_data.is_super_speed) {
2325 ss_hcd = usb_create_shared_hcd(&dummy_hcd, &pdev->dev,
2326 dev_name(&pdev->dev), hs_hcd);
2327 if (!ss_hcd) {
2328 retval = -ENOMEM;
2329 goto dealloc_usb2_hcd;
2330 }
2331
2332 retval = usb_add_hcd(ss_hcd, 0, 0);
2333 if (retval)
2334 goto put_usb3_hcd;
2335 }
2336 return 0;
2337
2338 put_usb3_hcd:
2339 usb_put_hcd(ss_hcd);
2340 dealloc_usb2_hcd:
2341 usb_put_hcd(hs_hcd);
2342 the_controller.hs_hcd = the_controller.ss_hcd = NULL;
2343 return retval;
2344 }
2345
2346 static int dummy_hcd_remove(struct platform_device *pdev)
2347 {
2348 struct dummy *dum;
2349
2350 dum = (hcd_to_dummy_hcd(platform_get_drvdata(pdev)))->dum;
2351
2352 if (dum->ss_hcd) {
2353 usb_remove_hcd(dummy_hcd_to_hcd(dum->ss_hcd));
2354 usb_put_hcd(dummy_hcd_to_hcd(dum->ss_hcd));
2355 }
2356
2357 usb_remove_hcd(dummy_hcd_to_hcd(dum->hs_hcd));
2358 usb_put_hcd(dummy_hcd_to_hcd(dum->hs_hcd));
2359
2360 the_controller.hs_hcd = NULL;
2361 the_controller.ss_hcd = NULL;
2362
2363 return 0;
2364 }
2365
2366 static int dummy_hcd_suspend (struct platform_device *pdev, pm_message_t state)
2367 {
2368 struct usb_hcd *hcd;
2369 struct dummy_hcd *dum_hcd;
2370 int rc = 0;
2371
2372 dev_dbg (&pdev->dev, "%s\n", __func__);
2373
2374 hcd = platform_get_drvdata (pdev);
2375 dum_hcd = hcd_to_dummy_hcd(hcd);
2376 if (dum_hcd->rh_state == DUMMY_RH_RUNNING) {
2377 dev_warn(&pdev->dev, "Root hub isn't suspended!\n");
2378 rc = -EBUSY;
2379 } else
2380 clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
2381 return rc;
2382 }
2383
2384 static int dummy_hcd_resume (struct platform_device *pdev)
2385 {
2386 struct usb_hcd *hcd;
2387
2388 dev_dbg (&pdev->dev, "%s\n", __func__);
2389
2390 hcd = platform_get_drvdata (pdev);
2391 set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
2392 usb_hcd_poll_rh_status (hcd);
2393 return 0;
2394 }
2395
2396 static struct platform_driver dummy_hcd_driver = {
2397 .probe = dummy_hcd_probe,
2398 .remove = dummy_hcd_remove,
2399 .suspend = dummy_hcd_suspend,
2400 .resume = dummy_hcd_resume,
2401 .driver = {
2402 .name = (char *) driver_name,
2403 .owner = THIS_MODULE,
2404 },
2405 };
2406
2407 /*-------------------------------------------------------------------------*/
2408
2409 static struct platform_device *the_udc_pdev;
2410 static struct platform_device *the_hcd_pdev;
2411
2412 static int __init init (void)
2413 {
2414 int retval = -ENOMEM;
2415
2416 if (usb_disabled ())
2417 return -ENODEV;
2418
2419 if (!mod_data.is_high_speed && mod_data.is_super_speed)
2420 return -EINVAL;
2421
2422 the_hcd_pdev = platform_device_alloc(driver_name, -1);
2423 if (!the_hcd_pdev)
2424 return retval;
2425 the_udc_pdev = platform_device_alloc(gadget_name, -1);
2426 if (!the_udc_pdev)
2427 goto err_alloc_udc;
2428
2429 retval = platform_driver_register(&dummy_hcd_driver);
2430 if (retval < 0)
2431 goto err_register_hcd_driver;
2432 retval = platform_driver_register(&dummy_udc_driver);
2433 if (retval < 0)
2434 goto err_register_udc_driver;
2435
2436 retval = platform_device_add(the_hcd_pdev);
2437 if (retval < 0)
2438 goto err_add_hcd;
2439 if (!the_controller.hs_hcd ||
2440 (!the_controller.ss_hcd && mod_data.is_super_speed)) {
2441 /*
2442 * The hcd was added successfully but its probe function failed
2443 * for some reason.
2444 */
2445 retval = -EINVAL;
2446 goto err_add_udc;
2447 }
2448 retval = platform_device_add(the_udc_pdev);
2449 if (retval < 0)
2450 goto err_add_udc;
2451 if (!platform_get_drvdata(the_udc_pdev)) {
2452 /*
2453 * The udc was added successfully but its probe function failed
2454 * for some reason.
2455 */
2456 retval = -EINVAL;
2457 goto err_probe_udc;
2458 }
2459 return retval;
2460
2461 err_probe_udc:
2462 platform_device_del(the_udc_pdev);
2463 err_add_udc:
2464 platform_device_del(the_hcd_pdev);
2465 err_add_hcd:
2466 platform_driver_unregister(&dummy_udc_driver);
2467 err_register_udc_driver:
2468 platform_driver_unregister(&dummy_hcd_driver);
2469 err_register_hcd_driver:
2470 platform_device_put(the_udc_pdev);
2471 err_alloc_udc:
2472 platform_device_put(the_hcd_pdev);
2473 return retval;
2474 }
2475 module_init (init);
2476
2477 static void __exit cleanup (void)
2478 {
2479 platform_device_unregister(the_udc_pdev);
2480 platform_device_unregister(the_hcd_pdev);
2481 platform_driver_unregister(&dummy_udc_driver);
2482 platform_driver_unregister(&dummy_hcd_driver);
2483 }
2484 module_exit (cleanup);
Linux kernel - Deliverables
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