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28#include <linux/module.h>
29#include <linux/kernel.h>
30#include <linux/delay.h>
31#include <linux/ioport.h>
32#include <linux/slab.h>
33#include <linux/errno.h>
34#include <linux/init.h>
35#include <linux/timer.h>
36#include <linux/list.h>
37#include <linux/interrupt.h>
38#include <linux/platform_device.h>
39#include <linux/usb.h>
40#include <linux/usb/gadget.h>
41#include <linux/usb/hcd.h>
42#include <linux/scatterlist.h>
43
44#include <asm/byteorder.h>
45#include <linux/io.h>
46#include <asm/irq.h>
47#include <asm/unaligned.h>
48
49#define DRIVER_DESC "USB Host+Gadget Emulator"
50#define DRIVER_VERSION "02 May 2005"
51
52#define POWER_BUDGET 500
53
54static const char driver_name[] = "dummy_hcd";
55static const char driver_desc[] = "USB Host+Gadget Emulator";
56
57static const char gadget_name[] = "dummy_udc";
58
59MODULE_DESCRIPTION(DRIVER_DESC);
60MODULE_AUTHOR("David Brownell");
61MODULE_LICENSE("GPL");
62
63struct dummy_hcd_module_parameters {
64 bool is_super_speed;
65 bool is_high_speed;
66 unsigned int num;
67};
68
69static struct dummy_hcd_module_parameters mod_data = {
70 .is_super_speed = false,
71 .is_high_speed = true,
72 .num = 1,
73};
74module_param_named(is_super_speed, mod_data.is_super_speed, bool, S_IRUGO);
75MODULE_PARM_DESC(is_super_speed, "true to simulate SuperSpeed connection");
76module_param_named(is_high_speed, mod_data.is_high_speed, bool, S_IRUGO);
77MODULE_PARM_DESC(is_high_speed, "true to simulate HighSpeed connection");
78module_param_named(num, mod_data.num, uint, S_IRUGO);
79MODULE_PARM_DESC(num, "number of emulated controllers");
80
81
82
83struct dummy_ep {
84 struct list_head queue;
85 unsigned long last_io;
86 struct usb_gadget *gadget;
87 const struct usb_endpoint_descriptor *desc;
88 struct usb_ep ep;
89 unsigned halted:1;
90 unsigned wedged:1;
91 unsigned already_seen:1;
92 unsigned setup_stage:1;
93 unsigned stream_en:1;
94};
95
96struct dummy_request {
97 struct list_head queue;
98 struct usb_request req;
99};
100
101static inline struct dummy_ep *usb_ep_to_dummy_ep(struct usb_ep *_ep)
102{
103 return container_of(_ep, struct dummy_ep, ep);
104}
105
106static inline struct dummy_request *usb_request_to_dummy_request
107 (struct usb_request *_req)
108{
109 return container_of(_req, struct dummy_request, req);
110}
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128static const char ep0name[] = "ep0";
129
130static const struct {
131 const char *name;
132 const struct usb_ep_caps caps;
133} ep_info[] = {
134#define EP_INFO(_name, _caps) \
135 { \
136 .name = _name, \
137 .caps = _caps, \
138 }
139
140
141 EP_INFO(ep0name,
142 USB_EP_CAPS(USB_EP_CAPS_TYPE_CONTROL, USB_EP_CAPS_DIR_ALL)),
143
144 EP_INFO("ep1in-bulk",
145 USB_EP_CAPS(USB_EP_CAPS_TYPE_BULK, USB_EP_CAPS_DIR_IN)),
146 EP_INFO("ep2out-bulk",
147 USB_EP_CAPS(USB_EP_CAPS_TYPE_BULK, USB_EP_CAPS_DIR_OUT)),
148 EP_INFO("ep3in-iso",
149 USB_EP_CAPS(USB_EP_CAPS_TYPE_ISO, USB_EP_CAPS_DIR_IN)),
150 EP_INFO("ep4out-iso",
151 USB_EP_CAPS(USB_EP_CAPS_TYPE_ISO, USB_EP_CAPS_DIR_OUT)),
152 EP_INFO("ep5in-int",
153 USB_EP_CAPS(USB_EP_CAPS_TYPE_INT, USB_EP_CAPS_DIR_IN)),
154 EP_INFO("ep6in-bulk",
155 USB_EP_CAPS(USB_EP_CAPS_TYPE_BULK, USB_EP_CAPS_DIR_IN)),
156 EP_INFO("ep7out-bulk",
157 USB_EP_CAPS(USB_EP_CAPS_TYPE_BULK, USB_EP_CAPS_DIR_OUT)),
158 EP_INFO("ep8in-iso",
159 USB_EP_CAPS(USB_EP_CAPS_TYPE_ISO, USB_EP_CAPS_DIR_IN)),
160 EP_INFO("ep9out-iso",
161 USB_EP_CAPS(USB_EP_CAPS_TYPE_ISO, USB_EP_CAPS_DIR_OUT)),
162 EP_INFO("ep10in-int",
163 USB_EP_CAPS(USB_EP_CAPS_TYPE_INT, USB_EP_CAPS_DIR_IN)),
164 EP_INFO("ep11in-bulk",
165 USB_EP_CAPS(USB_EP_CAPS_TYPE_BULK, USB_EP_CAPS_DIR_IN)),
166 EP_INFO("ep12out-bulk",
167 USB_EP_CAPS(USB_EP_CAPS_TYPE_BULK, USB_EP_CAPS_DIR_OUT)),
168 EP_INFO("ep13in-iso",
169 USB_EP_CAPS(USB_EP_CAPS_TYPE_ISO, USB_EP_CAPS_DIR_IN)),
170 EP_INFO("ep14out-iso",
171 USB_EP_CAPS(USB_EP_CAPS_TYPE_ISO, USB_EP_CAPS_DIR_OUT)),
172 EP_INFO("ep15in-int",
173 USB_EP_CAPS(USB_EP_CAPS_TYPE_INT, USB_EP_CAPS_DIR_IN)),
174
175 EP_INFO("ep1out-bulk",
176 USB_EP_CAPS(USB_EP_CAPS_TYPE_BULK, USB_EP_CAPS_DIR_OUT)),
177 EP_INFO("ep2in-bulk",
178 USB_EP_CAPS(USB_EP_CAPS_TYPE_BULK, USB_EP_CAPS_DIR_IN)),
179
180 EP_INFO("ep3out",
181 USB_EP_CAPS(USB_EP_CAPS_TYPE_ALL, USB_EP_CAPS_DIR_OUT)),
182 EP_INFO("ep4in",
183 USB_EP_CAPS(USB_EP_CAPS_TYPE_ALL, USB_EP_CAPS_DIR_IN)),
184 EP_INFO("ep5out",
185 USB_EP_CAPS(USB_EP_CAPS_TYPE_ALL, USB_EP_CAPS_DIR_OUT)),
186 EP_INFO("ep6out",
187 USB_EP_CAPS(USB_EP_CAPS_TYPE_ALL, USB_EP_CAPS_DIR_OUT)),
188 EP_INFO("ep7in",
189 USB_EP_CAPS(USB_EP_CAPS_TYPE_ALL, USB_EP_CAPS_DIR_IN)),
190 EP_INFO("ep8out",
191 USB_EP_CAPS(USB_EP_CAPS_TYPE_ALL, USB_EP_CAPS_DIR_OUT)),
192 EP_INFO("ep9in",
193 USB_EP_CAPS(USB_EP_CAPS_TYPE_ALL, USB_EP_CAPS_DIR_IN)),
194 EP_INFO("ep10out",
195 USB_EP_CAPS(USB_EP_CAPS_TYPE_ALL, USB_EP_CAPS_DIR_OUT)),
196 EP_INFO("ep11out",
197 USB_EP_CAPS(USB_EP_CAPS_TYPE_ALL, USB_EP_CAPS_DIR_OUT)),
198 EP_INFO("ep12in",
199 USB_EP_CAPS(USB_EP_CAPS_TYPE_ALL, USB_EP_CAPS_DIR_IN)),
200 EP_INFO("ep13out",
201 USB_EP_CAPS(USB_EP_CAPS_TYPE_ALL, USB_EP_CAPS_DIR_OUT)),
202 EP_INFO("ep14in",
203 USB_EP_CAPS(USB_EP_CAPS_TYPE_ALL, USB_EP_CAPS_DIR_IN)),
204 EP_INFO("ep15out",
205 USB_EP_CAPS(USB_EP_CAPS_TYPE_ALL, USB_EP_CAPS_DIR_OUT)),
206
207#undef EP_INFO
208};
209
210#define DUMMY_ENDPOINTS ARRAY_SIZE(ep_info)
211
212
213
214#define FIFO_SIZE 64
215
216struct urbp {
217 struct urb *urb;
218 struct list_head urbp_list;
219 struct sg_mapping_iter miter;
220 u32 miter_started;
221};
222
223
224enum dummy_rh_state {
225 DUMMY_RH_RESET,
226 DUMMY_RH_SUSPENDED,
227 DUMMY_RH_RUNNING
228};
229
230struct dummy_hcd {
231 struct dummy *dum;
232 enum dummy_rh_state rh_state;
233 struct timer_list timer;
234 u32 port_status;
235 u32 old_status;
236 unsigned long re_timeout;
237
238 struct usb_device *udev;
239 struct list_head urbp_list;
240 u32 stream_en_ep;
241 u8 num_stream[30 / 2];
242
243 unsigned active:1;
244 unsigned old_active:1;
245 unsigned resuming:1;
246};
247
248struct dummy {
249 spinlock_t lock;
250
251
252
253
254 struct dummy_ep ep[DUMMY_ENDPOINTS];
255 int address;
256 struct usb_gadget gadget;
257 struct usb_gadget_driver *driver;
258 struct dummy_request fifo_req;
259 u8 fifo_buf[FIFO_SIZE];
260 u16 devstatus;
261 unsigned udc_suspended:1;
262 unsigned pullup:1;
263
264
265
266
267 struct dummy_hcd *hs_hcd;
268 struct dummy_hcd *ss_hcd;
269};
270
271static inline struct dummy_hcd *hcd_to_dummy_hcd(struct usb_hcd *hcd)
272{
273 return (struct dummy_hcd *) (hcd->hcd_priv);
274}
275
276static inline struct usb_hcd *dummy_hcd_to_hcd(struct dummy_hcd *dum)
277{
278 return container_of((void *) dum, struct usb_hcd, hcd_priv);
279}
280
281static inline struct device *dummy_dev(struct dummy_hcd *dum)
282{
283 return dummy_hcd_to_hcd(dum)->self.controller;
284}
285
286static inline struct device *udc_dev(struct dummy *dum)
287{
288 return dum->gadget.dev.parent;
289}
290
291static inline struct dummy *ep_to_dummy(struct dummy_ep *ep)
292{
293 return container_of(ep->gadget, struct dummy, gadget);
294}
295
296static inline struct dummy_hcd *gadget_to_dummy_hcd(struct usb_gadget *gadget)
297{
298 struct dummy *dum = container_of(gadget, struct dummy, gadget);
299 if (dum->gadget.speed == USB_SPEED_SUPER)
300 return dum->ss_hcd;
301 else
302 return dum->hs_hcd;
303}
304
305static inline struct dummy *gadget_dev_to_dummy(struct device *dev)
306{
307 return container_of(dev, struct dummy, gadget.dev);
308}
309
310
311
312
313
314
315static void nuke(struct dummy *dum, struct dummy_ep *ep)
316{
317 while (!list_empty(&ep->queue)) {
318 struct dummy_request *req;
319
320 req = list_entry(ep->queue.next, struct dummy_request, queue);
321 list_del_init(&req->queue);
322 req->req.status = -ESHUTDOWN;
323
324 spin_unlock(&dum->lock);
325 usb_gadget_giveback_request(&ep->ep, &req->req);
326 spin_lock(&dum->lock);
327 }
328}
329
330
331static void stop_activity(struct dummy *dum)
332{
333 struct dummy_ep *ep;
334
335
336 dum->address = 0;
337
338
339
340
341 list_for_each_entry(ep, &dum->gadget.ep_list, ep.ep_list)
342 nuke(dum, ep);
343
344
345}
346
347
348
349
350
351
352
353
354
355static void set_link_state_by_speed(struct dummy_hcd *dum_hcd)
356{
357 struct dummy *dum = dum_hcd->dum;
358
359 if (dummy_hcd_to_hcd(dum_hcd)->speed == HCD_USB3) {
360 if ((dum_hcd->port_status & USB_SS_PORT_STAT_POWER) == 0) {
361 dum_hcd->port_status = 0;
362 } else if (!dum->pullup || dum->udc_suspended) {
363
364 dum_hcd->port_status &= ~(USB_PORT_STAT_CONNECTION |
365 USB_PORT_STAT_ENABLE);
366 if ((dum_hcd->old_status &
367 USB_PORT_STAT_CONNECTION) != 0)
368 dum_hcd->port_status |=
369 (USB_PORT_STAT_C_CONNECTION << 16);
370 } else {
371
372 dum_hcd->port_status |= (USB_PORT_STAT_CONNECTION |
373 USB_PORT_STAT_SPEED_5GBPS) ;
374 if ((dum_hcd->old_status &
375 USB_PORT_STAT_CONNECTION) == 0)
376 dum_hcd->port_status |=
377 (USB_PORT_STAT_C_CONNECTION << 16);
378 if ((dum_hcd->port_status &
379 USB_PORT_STAT_ENABLE) == 1 &&
380 (dum_hcd->port_status &
381 USB_SS_PORT_LS_U0) == 1 &&
382 dum_hcd->rh_state != DUMMY_RH_SUSPENDED)
383 dum_hcd->active = 1;
384 }
385 } else {
386 if ((dum_hcd->port_status & USB_PORT_STAT_POWER) == 0) {
387 dum_hcd->port_status = 0;
388 } else if (!dum->pullup || dum->udc_suspended) {
389
390 dum_hcd->port_status &= ~(USB_PORT_STAT_CONNECTION |
391 USB_PORT_STAT_ENABLE |
392 USB_PORT_STAT_LOW_SPEED |
393 USB_PORT_STAT_HIGH_SPEED |
394 USB_PORT_STAT_SUSPEND);
395 if ((dum_hcd->old_status &
396 USB_PORT_STAT_CONNECTION) != 0)
397 dum_hcd->port_status |=
398 (USB_PORT_STAT_C_CONNECTION << 16);
399 } else {
400 dum_hcd->port_status |= USB_PORT_STAT_CONNECTION;
401 if ((dum_hcd->old_status &
402 USB_PORT_STAT_CONNECTION) == 0)
403 dum_hcd->port_status |=
404 (USB_PORT_STAT_C_CONNECTION << 16);
405 if ((dum_hcd->port_status & USB_PORT_STAT_ENABLE) == 0)
406 dum_hcd->port_status &= ~USB_PORT_STAT_SUSPEND;
407 else if ((dum_hcd->port_status &
408 USB_PORT_STAT_SUSPEND) == 0 &&
409 dum_hcd->rh_state != DUMMY_RH_SUSPENDED)
410 dum_hcd->active = 1;
411 }
412 }
413}
414
415
416static void set_link_state(struct dummy_hcd *dum_hcd)
417{
418 struct dummy *dum = dum_hcd->dum;
419
420 dum_hcd->active = 0;
421 if (dum->pullup)
422 if ((dummy_hcd_to_hcd(dum_hcd)->speed == HCD_USB3 &&
423 dum->gadget.speed != USB_SPEED_SUPER) ||
424 (dummy_hcd_to_hcd(dum_hcd)->speed != HCD_USB3 &&
425 dum->gadget.speed == USB_SPEED_SUPER))
426 return;
427
428 set_link_state_by_speed(dum_hcd);
429
430 if ((dum_hcd->port_status & USB_PORT_STAT_ENABLE) == 0 ||
431 dum_hcd->active)
432 dum_hcd->resuming = 0;
433
434
435 if ((dum_hcd->port_status & USB_PORT_STAT_CONNECTION) == 0 ||
436 (dum_hcd->port_status & USB_PORT_STAT_RESET) != 0) {
437 unsigned disconnect = USB_PORT_STAT_CONNECTION &
438 dum_hcd->old_status & (~dum_hcd->port_status);
439 unsigned reset = USB_PORT_STAT_RESET &
440 (~dum_hcd->old_status) & dum_hcd->port_status;
441
442
443 if (dum->driver && (disconnect || reset)) {
444 stop_activity(dum);
445 spin_unlock(&dum->lock);
446 if (reset)
447 usb_gadget_udc_reset(&dum->gadget, dum->driver);
448 else
449 dum->driver->disconnect(&dum->gadget);
450 spin_lock(&dum->lock);
451 }
452 } else if (dum_hcd->active != dum_hcd->old_active) {
453 if (dum_hcd->old_active && dum->driver->suspend) {
454 spin_unlock(&dum->lock);
455 dum->driver->suspend(&dum->gadget);
456 spin_lock(&dum->lock);
457 } else if (!dum_hcd->old_active && dum->driver->resume) {
458 spin_unlock(&dum->lock);
459 dum->driver->resume(&dum->gadget);
460 spin_lock(&dum->lock);
461 }
462 }
463
464 dum_hcd->old_status = dum_hcd->port_status;
465 dum_hcd->old_active = dum_hcd->active;
466}
467
468
469
470
471
472
473
474
475
476
477#define is_enabled(dum) \
478 (dum->port_status & USB_PORT_STAT_ENABLE)
479
480static int dummy_enable(struct usb_ep *_ep,
481 const struct usb_endpoint_descriptor *desc)
482{
483 struct dummy *dum;
484 struct dummy_hcd *dum_hcd;
485 struct dummy_ep *ep;
486 unsigned max;
487 int retval;
488
489 ep = usb_ep_to_dummy_ep(_ep);
490 if (!_ep || !desc || ep->desc || _ep->name == ep0name
491 || desc->bDescriptorType != USB_DT_ENDPOINT)
492 return -EINVAL;
493 dum = ep_to_dummy(ep);
494 if (!dum->driver)
495 return -ESHUTDOWN;
496
497 dum_hcd = gadget_to_dummy_hcd(&dum->gadget);
498 if (!is_enabled(dum_hcd))
499 return -ESHUTDOWN;
500
501
502
503
504
505
506 max = usb_endpoint_maxp(desc) & 0x7ff;
507
508
509
510
511
512
513
514
515
516 retval = -EINVAL;
517 switch (usb_endpoint_type(desc)) {
518 case USB_ENDPOINT_XFER_BULK:
519 if (strstr(ep->ep.name, "-iso")
520 || strstr(ep->ep.name, "-int")) {
521 goto done;
522 }
523 switch (dum->gadget.speed) {
524 case USB_SPEED_SUPER:
525 if (max == 1024)
526 break;
527 goto done;
528 case USB_SPEED_HIGH:
529 if (max == 512)
530 break;
531 goto done;
532 case USB_SPEED_FULL:
533 if (max == 8 || max == 16 || max == 32 || max == 64)
534
535 break;
536
537 default:
538 goto done;
539 }
540 break;
541 case USB_ENDPOINT_XFER_INT:
542 if (strstr(ep->ep.name, "-iso"))
543 goto done;
544
545 switch (dum->gadget.speed) {
546 case USB_SPEED_SUPER:
547 case USB_SPEED_HIGH:
548 if (max <= 1024)
549 break;
550
551 case USB_SPEED_FULL:
552 if (max <= 64)
553 break;
554
555 default:
556 if (max <= 8)
557 break;
558 goto done;
559 }
560 break;
561 case USB_ENDPOINT_XFER_ISOC:
562 if (strstr(ep->ep.name, "-bulk")
563 || strstr(ep->ep.name, "-int"))
564 goto done;
565
566 switch (dum->gadget.speed) {
567 case USB_SPEED_SUPER:
568 case USB_SPEED_HIGH:
569 if (max <= 1024)
570 break;
571
572 case USB_SPEED_FULL:
573 if (max <= 1023)
574 break;
575
576 default:
577 goto done;
578 }
579 break;
580 default:
581
582 goto done;
583 }
584
585 _ep->maxpacket = max;
586 if (usb_ss_max_streams(_ep->comp_desc)) {
587 if (!usb_endpoint_xfer_bulk(desc)) {
588 dev_err(udc_dev(dum), "Can't enable stream support on "
589 "non-bulk ep %s\n", _ep->name);
590 return -EINVAL;
591 }
592 ep->stream_en = 1;
593 }
594 ep->desc = desc;
595
596 dev_dbg(udc_dev(dum), "enabled %s (ep%d%s-%s) maxpacket %d stream %s\n",
597 _ep->name,
598 desc->bEndpointAddress & 0x0f,
599 (desc->bEndpointAddress & USB_DIR_IN) ? "in" : "out",
600 ({ char *val;
601 switch (usb_endpoint_type(desc)) {
602 case USB_ENDPOINT_XFER_BULK:
603 val = "bulk";
604 break;
605 case USB_ENDPOINT_XFER_ISOC:
606 val = "iso";
607 break;
608 case USB_ENDPOINT_XFER_INT:
609 val = "intr";
610 break;
611 default:
612 val = "ctrl";
613 break;
614 } val; }),
615 max, ep->stream_en ? "enabled" : "disabled");
616
617
618
619
620 ep->halted = ep->wedged = 0;
621 retval = 0;
622done:
623 return retval;
624}
625
626static int dummy_disable(struct usb_ep *_ep)
627{
628 struct dummy_ep *ep;
629 struct dummy *dum;
630 unsigned long flags;
631
632 ep = usb_ep_to_dummy_ep(_ep);
633 if (!_ep || !ep->desc || _ep->name == ep0name)
634 return -EINVAL;
635 dum = ep_to_dummy(ep);
636
637 spin_lock_irqsave(&dum->lock, flags);
638 ep->desc = NULL;
639 ep->stream_en = 0;
640 nuke(dum, ep);
641 spin_unlock_irqrestore(&dum->lock, flags);
642
643 dev_dbg(udc_dev(dum), "disabled %s\n", _ep->name);
644 return 0;
645}
646
647static struct usb_request *dummy_alloc_request(struct usb_ep *_ep,
648 gfp_t mem_flags)
649{
650 struct dummy_request *req;
651
652 if (!_ep)
653 return NULL;
654
655 req = kzalloc(sizeof(*req), mem_flags);
656 if (!req)
657 return NULL;
658 INIT_LIST_HEAD(&req->queue);
659 return &req->req;
660}
661
662static void dummy_free_request(struct usb_ep *_ep, struct usb_request *_req)
663{
664 struct dummy_request *req;
665
666 if (!_ep || !_req) {
667 WARN_ON(1);
668 return;
669 }
670
671 req = usb_request_to_dummy_request(_req);
672 WARN_ON(!list_empty(&req->queue));
673 kfree(req);
674}
675
676static void fifo_complete(struct usb_ep *ep, struct usb_request *req)
677{
678}
679
680static int dummy_queue(struct usb_ep *_ep, struct usb_request *_req,
681 gfp_t mem_flags)
682{
683 struct dummy_ep *ep;
684 struct dummy_request *req;
685 struct dummy *dum;
686 struct dummy_hcd *dum_hcd;
687 unsigned long flags;
688
689 req = usb_request_to_dummy_request(_req);
690 if (!_req || !list_empty(&req->queue) || !_req->complete)
691 return -EINVAL;
692
693 ep = usb_ep_to_dummy_ep(_ep);
694 if (!_ep || (!ep->desc && _ep->name != ep0name))
695 return -EINVAL;
696
697 dum = ep_to_dummy(ep);
698 dum_hcd = gadget_to_dummy_hcd(&dum->gadget);
699 if (!dum->driver || !is_enabled(dum_hcd))
700 return -ESHUTDOWN;
701
702#if 0
703 dev_dbg(udc_dev(dum), "ep %p queue req %p to %s, len %d buf %p\n",
704 ep, _req, _ep->name, _req->length, _req->buf);
705#endif
706 _req->status = -EINPROGRESS;
707 _req->actual = 0;
708 spin_lock_irqsave(&dum->lock, flags);
709
710
711 if (ep->desc && (ep->desc->bEndpointAddress & USB_DIR_IN) &&
712 list_empty(&dum->fifo_req.queue) &&
713 list_empty(&ep->queue) &&
714 _req->length <= FIFO_SIZE) {
715 req = &dum->fifo_req;
716 req->req = *_req;
717 req->req.buf = dum->fifo_buf;
718 memcpy(dum->fifo_buf, _req->buf, _req->length);
719 req->req.context = dum;
720 req->req.complete = fifo_complete;
721
722 list_add_tail(&req->queue, &ep->queue);
723 spin_unlock(&dum->lock);
724 _req->actual = _req->length;
725 _req->status = 0;
726 usb_gadget_giveback_request(_ep, _req);
727 spin_lock(&dum->lock);
728 } else
729 list_add_tail(&req->queue, &ep->queue);
730 spin_unlock_irqrestore(&dum->lock, flags);
731
732
733
734
735 return 0;
736}
737
738static int dummy_dequeue(struct usb_ep *_ep, struct usb_request *_req)
739{
740 struct dummy_ep *ep;
741 struct dummy *dum;
742 int retval = -EINVAL;
743 unsigned long flags;
744 struct dummy_request *req = NULL;
745
746 if (!_ep || !_req)
747 return retval;
748 ep = usb_ep_to_dummy_ep(_ep);
749 dum = ep_to_dummy(ep);
750
751 if (!dum->driver)
752 return -ESHUTDOWN;
753
754 local_irq_save(flags);
755 spin_lock(&dum->lock);
756 list_for_each_entry(req, &ep->queue, queue) {
757 if (&req->req == _req) {
758 list_del_init(&req->queue);
759 _req->status = -ECONNRESET;
760 retval = 0;
761 break;
762 }
763 }
764 spin_unlock(&dum->lock);
765
766 if (retval == 0) {
767 dev_dbg(udc_dev(dum),
768 "dequeued req %p from %s, len %d buf %p\n",
769 req, _ep->name, _req->length, _req->buf);
770 usb_gadget_giveback_request(_ep, _req);
771 }
772 local_irq_restore(flags);
773 return retval;
774}
775
776static int
777dummy_set_halt_and_wedge(struct usb_ep *_ep, int value, int wedged)
778{
779 struct dummy_ep *ep;
780 struct dummy *dum;
781
782 if (!_ep)
783 return -EINVAL;
784 ep = usb_ep_to_dummy_ep(_ep);
785 dum = ep_to_dummy(ep);
786 if (!dum->driver)
787 return -ESHUTDOWN;
788 if (!value)
789 ep->halted = ep->wedged = 0;
790 else if (ep->desc && (ep->desc->bEndpointAddress & USB_DIR_IN) &&
791 !list_empty(&ep->queue))
792 return -EAGAIN;
793 else {
794 ep->halted = 1;
795 if (wedged)
796 ep->wedged = 1;
797 }
798
799 return 0;
800}
801
802static int
803dummy_set_halt(struct usb_ep *_ep, int value)
804{
805 return dummy_set_halt_and_wedge(_ep, value, 0);
806}
807
808static int dummy_set_wedge(struct usb_ep *_ep)
809{
810 if (!_ep || _ep->name == ep0name)
811 return -EINVAL;
812 return dummy_set_halt_and_wedge(_ep, 1, 1);
813}
814
815static const struct usb_ep_ops dummy_ep_ops = {
816 .enable = dummy_enable,
817 .disable = dummy_disable,
818
819 .alloc_request = dummy_alloc_request,
820 .free_request = dummy_free_request,
821
822 .queue = dummy_queue,
823 .dequeue = dummy_dequeue,
824
825 .set_halt = dummy_set_halt,
826 .set_wedge = dummy_set_wedge,
827};
828
829
830
831
832static int dummy_g_get_frame(struct usb_gadget *_gadget)
833{
834 struct timespec64 ts64;
835
836 ktime_get_ts64(&ts64);
837 return ts64.tv_nsec / NSEC_PER_MSEC;
838}
839
840static int dummy_wakeup(struct usb_gadget *_gadget)
841{
842 struct dummy_hcd *dum_hcd;
843
844 dum_hcd = gadget_to_dummy_hcd(_gadget);
845 if (!(dum_hcd->dum->devstatus & ((1 << USB_DEVICE_B_HNP_ENABLE)
846 | (1 << USB_DEVICE_REMOTE_WAKEUP))))
847 return -EINVAL;
848 if ((dum_hcd->port_status & USB_PORT_STAT_CONNECTION) == 0)
849 return -ENOLINK;
850 if ((dum_hcd->port_status & USB_PORT_STAT_SUSPEND) == 0 &&
851 dum_hcd->rh_state != DUMMY_RH_SUSPENDED)
852 return -EIO;
853
854
855
856
857 dum_hcd->resuming = 1;
858 dum_hcd->re_timeout = jiffies + msecs_to_jiffies(20);
859 mod_timer(&dummy_hcd_to_hcd(dum_hcd)->rh_timer, dum_hcd->re_timeout);
860 return 0;
861}
862
863static int dummy_set_selfpowered(struct usb_gadget *_gadget, int value)
864{
865 struct dummy *dum;
866
867 _gadget->is_selfpowered = (value != 0);
868 dum = gadget_to_dummy_hcd(_gadget)->dum;
869 if (value)
870 dum->devstatus |= (1 << USB_DEVICE_SELF_POWERED);
871 else
872 dum->devstatus &= ~(1 << USB_DEVICE_SELF_POWERED);
873 return 0;
874}
875
876static void dummy_udc_update_ep0(struct dummy *dum)
877{
878 if (dum->gadget.speed == USB_SPEED_SUPER)
879 dum->ep[0].ep.maxpacket = 9;
880 else
881 dum->ep[0].ep.maxpacket = 64;
882}
883
884static int dummy_pullup(struct usb_gadget *_gadget, int value)
885{
886 struct dummy_hcd *dum_hcd;
887 struct dummy *dum;
888 unsigned long flags;
889
890 dum = gadget_dev_to_dummy(&_gadget->dev);
891
892 if (value && dum->driver) {
893 if (mod_data.is_super_speed)
894 dum->gadget.speed = dum->driver->max_speed;
895 else if (mod_data.is_high_speed)
896 dum->gadget.speed = min_t(u8, USB_SPEED_HIGH,
897 dum->driver->max_speed);
898 else
899 dum->gadget.speed = USB_SPEED_FULL;
900 dummy_udc_update_ep0(dum);
901
902 if (dum->gadget.speed < dum->driver->max_speed)
903 dev_dbg(udc_dev(dum), "This device can perform faster"
904 " if you connect it to a %s port...\n",
905 usb_speed_string(dum->driver->max_speed));
906 }
907 dum_hcd = gadget_to_dummy_hcd(_gadget);
908
909 spin_lock_irqsave(&dum->lock, flags);
910 dum->pullup = (value != 0);
911 set_link_state(dum_hcd);
912 spin_unlock_irqrestore(&dum->lock, flags);
913
914 usb_hcd_poll_rh_status(dummy_hcd_to_hcd(dum_hcd));
915 return 0;
916}
917
918static int dummy_udc_start(struct usb_gadget *g,
919 struct usb_gadget_driver *driver);
920static int dummy_udc_stop(struct usb_gadget *g);
921
922static const struct usb_gadget_ops dummy_ops = {
923 .get_frame = dummy_g_get_frame,
924 .wakeup = dummy_wakeup,
925 .set_selfpowered = dummy_set_selfpowered,
926 .pullup = dummy_pullup,
927 .udc_start = dummy_udc_start,
928 .udc_stop = dummy_udc_stop,
929};
930
931
932
933
934static ssize_t function_show(struct device *dev, struct device_attribute *attr,
935 char *buf)
936{
937 struct dummy *dum = gadget_dev_to_dummy(dev);
938
939 if (!dum->driver || !dum->driver->function)
940 return 0;
941 return scnprintf(buf, PAGE_SIZE, "%s\n", dum->driver->function);
942}
943static DEVICE_ATTR_RO(function);
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961static int dummy_udc_start(struct usb_gadget *g,
962 struct usb_gadget_driver *driver)
963{
964 struct dummy_hcd *dum_hcd = gadget_to_dummy_hcd(g);
965 struct dummy *dum = dum_hcd->dum;
966
967 if (driver->max_speed == USB_SPEED_UNKNOWN)
968 return -EINVAL;
969
970
971
972
973
974
975 dum->devstatus = 0;
976 dum->driver = driver;
977
978 return 0;
979}
980
981static int dummy_udc_stop(struct usb_gadget *g)
982{
983 struct dummy_hcd *dum_hcd = gadget_to_dummy_hcd(g);
984 struct dummy *dum = dum_hcd->dum;
985
986 dum->driver = NULL;
987
988 return 0;
989}
990
991#undef is_enabled
992
993
994
995static void init_dummy_udc_hw(struct dummy *dum)
996{
997 int i;
998
999 INIT_LIST_HEAD(&dum->gadget.ep_list);
1000 for (i = 0; i < DUMMY_ENDPOINTS; i++) {
1001 struct dummy_ep *ep = &dum->ep[i];
1002
1003 if (!ep_info[i].name)
1004 break;
1005 ep->ep.name = ep_info[i].name;
1006 ep->ep.caps = ep_info[i].caps;
1007 ep->ep.ops = &dummy_ep_ops;
1008 list_add_tail(&ep->ep.ep_list, &dum->gadget.ep_list);
1009 ep->halted = ep->wedged = ep->already_seen =
1010 ep->setup_stage = 0;
1011 usb_ep_set_maxpacket_limit(&ep->ep, ~0);
1012 ep->ep.max_streams = 16;
1013 ep->last_io = jiffies;
1014 ep->gadget = &dum->gadget;
1015 ep->desc = NULL;
1016 INIT_LIST_HEAD(&ep->queue);
1017 }
1018
1019 dum->gadget.ep0 = &dum->ep[0].ep;
1020 list_del_init(&dum->ep[0].ep.ep_list);
1021 INIT_LIST_HEAD(&dum->fifo_req.queue);
1022
1023#ifdef CONFIG_USB_OTG
1024 dum->gadget.is_otg = 1;
1025#endif
1026}
1027
1028static int dummy_udc_probe(struct platform_device *pdev)
1029{
1030 struct dummy *dum;
1031 int rc;
1032
1033 dum = *((void **)dev_get_platdata(&pdev->dev));
1034 dum->gadget.name = gadget_name;
1035 dum->gadget.ops = &dummy_ops;
1036 dum->gadget.max_speed = USB_SPEED_SUPER;
1037
1038 dum->gadget.dev.parent = &pdev->dev;
1039 init_dummy_udc_hw(dum);
1040
1041 rc = usb_add_gadget_udc(&pdev->dev, &dum->gadget);
1042 if (rc < 0)
1043 goto err_udc;
1044
1045 rc = device_create_file(&dum->gadget.dev, &dev_attr_function);
1046 if (rc < 0)
1047 goto err_dev;
1048 platform_set_drvdata(pdev, dum);
1049 return rc;
1050
1051err_dev:
1052 usb_del_gadget_udc(&dum->gadget);
1053err_udc:
1054 return rc;
1055}
1056
1057static int dummy_udc_remove(struct platform_device *pdev)
1058{
1059 struct dummy *dum = platform_get_drvdata(pdev);
1060
1061 device_remove_file(&dum->gadget.dev, &dev_attr_function);
1062 usb_del_gadget_udc(&dum->gadget);
1063 return 0;
1064}
1065
1066static void dummy_udc_pm(struct dummy *dum, struct dummy_hcd *dum_hcd,
1067 int suspend)
1068{
1069 spin_lock_irq(&dum->lock);
1070 dum->udc_suspended = suspend;
1071 set_link_state(dum_hcd);
1072 spin_unlock_irq(&dum->lock);
1073}
1074
1075static int dummy_udc_suspend(struct platform_device *pdev, pm_message_t state)
1076{
1077 struct dummy *dum = platform_get_drvdata(pdev);
1078 struct dummy_hcd *dum_hcd = gadget_to_dummy_hcd(&dum->gadget);
1079
1080 dev_dbg(&pdev->dev, "%s\n", __func__);
1081 dummy_udc_pm(dum, dum_hcd, 1);
1082 usb_hcd_poll_rh_status(dummy_hcd_to_hcd(dum_hcd));
1083 return 0;
1084}
1085
1086static int dummy_udc_resume(struct platform_device *pdev)
1087{
1088 struct dummy *dum = platform_get_drvdata(pdev);
1089 struct dummy_hcd *dum_hcd = gadget_to_dummy_hcd(&dum->gadget);
1090
1091 dev_dbg(&pdev->dev, "%s\n", __func__);
1092 dummy_udc_pm(dum, dum_hcd, 0);
1093 usb_hcd_poll_rh_status(dummy_hcd_to_hcd(dum_hcd));
1094 return 0;
1095}
1096
1097static struct platform_driver dummy_udc_driver = {
1098 .probe = dummy_udc_probe,
1099 .remove = dummy_udc_remove,
1100 .suspend = dummy_udc_suspend,
1101 .resume = dummy_udc_resume,
1102 .driver = {
1103 .name = (char *) gadget_name,
1104 },
1105};
1106
1107
1108
1109static unsigned int dummy_get_ep_idx(const struct usb_endpoint_descriptor *desc)
1110{
1111 unsigned int index;
1112
1113 index = usb_endpoint_num(desc) << 1;
1114 if (usb_endpoint_dir_in(desc))
1115 index |= 1;
1116 return index;
1117}
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131static int dummy_ep_stream_en(struct dummy_hcd *dum_hcd, struct urb *urb)
1132{
1133 const struct usb_endpoint_descriptor *desc = &urb->ep->desc;
1134 u32 index;
1135
1136 if (!usb_endpoint_xfer_bulk(desc))
1137 return 0;
1138
1139 index = dummy_get_ep_idx(desc);
1140 return (1 << index) & dum_hcd->stream_en_ep;
1141}
1142
1143
1144
1145
1146
1147
1148
1149
1150static int get_max_streams_for_pipe(struct dummy_hcd *dum_hcd,
1151 unsigned int pipe)
1152{
1153 int max_streams;
1154
1155 max_streams = dum_hcd->num_stream[usb_pipeendpoint(pipe)];
1156 if (usb_pipeout(pipe))
1157 max_streams >>= 4;
1158 else
1159 max_streams &= 0xf;
1160 max_streams++;
1161 return max_streams;
1162}
1163
1164static void set_max_streams_for_pipe(struct dummy_hcd *dum_hcd,
1165 unsigned int pipe, unsigned int streams)
1166{
1167 int max_streams;
1168
1169 streams--;
1170 max_streams = dum_hcd->num_stream[usb_pipeendpoint(pipe)];
1171 if (usb_pipeout(pipe)) {
1172 streams <<= 4;
1173 max_streams &= 0xf;
1174 } else {
1175 max_streams &= 0xf0;
1176 }
1177 max_streams |= streams;
1178 dum_hcd->num_stream[usb_pipeendpoint(pipe)] = max_streams;
1179}
1180
1181static int dummy_validate_stream(struct dummy_hcd *dum_hcd, struct urb *urb)
1182{
1183 unsigned int max_streams;
1184 int enabled;
1185
1186 enabled = dummy_ep_stream_en(dum_hcd, urb);
1187 if (!urb->stream_id) {
1188 if (enabled)
1189 return -EINVAL;
1190 return 0;
1191 }
1192 if (!enabled)
1193 return -EINVAL;
1194
1195 max_streams = get_max_streams_for_pipe(dum_hcd,
1196 usb_pipeendpoint(urb->pipe));
1197 if (urb->stream_id > max_streams) {
1198 dev_err(dummy_dev(dum_hcd), "Stream id %d is out of range.\n",
1199 urb->stream_id);
1200 BUG();
1201 return -EINVAL;
1202 }
1203 return 0;
1204}
1205
1206static int dummy_urb_enqueue(
1207 struct usb_hcd *hcd,
1208 struct urb *urb,
1209 gfp_t mem_flags
1210) {
1211 struct dummy_hcd *dum_hcd;
1212 struct urbp *urbp;
1213 unsigned long flags;
1214 int rc;
1215
1216 urbp = kmalloc(sizeof *urbp, mem_flags);
1217 if (!urbp)
1218 return -ENOMEM;
1219 urbp->urb = urb;
1220 urbp->miter_started = 0;
1221
1222 dum_hcd = hcd_to_dummy_hcd(hcd);
1223 spin_lock_irqsave(&dum_hcd->dum->lock, flags);
1224
1225 rc = dummy_validate_stream(dum_hcd, urb);
1226 if (rc) {
1227 kfree(urbp);
1228 goto done;
1229 }
1230
1231 rc = usb_hcd_link_urb_to_ep(hcd, urb);
1232 if (rc) {
1233 kfree(urbp);
1234 goto done;
1235 }
1236
1237 if (!dum_hcd->udev) {
1238 dum_hcd->udev = urb->dev;
1239 usb_get_dev(dum_hcd->udev);
1240 } else if (unlikely(dum_hcd->udev != urb->dev))
1241 dev_err(dummy_dev(dum_hcd), "usb_device address has changed!\n");
1242
1243 list_add_tail(&urbp->urbp_list, &dum_hcd->urbp_list);
1244 urb->hcpriv = urbp;
1245 if (usb_pipetype(urb->pipe) == PIPE_CONTROL)
1246 urb->error_count = 1;
1247
1248
1249 if (!timer_pending(&dum_hcd->timer))
1250 mod_timer(&dum_hcd->timer, jiffies + 1);
1251
1252 done:
1253 spin_unlock_irqrestore(&dum_hcd->dum->lock, flags);
1254 return rc;
1255}
1256
1257static int dummy_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status)
1258{
1259 struct dummy_hcd *dum_hcd;
1260 unsigned long flags;
1261 int rc;
1262
1263
1264
1265 dum_hcd = hcd_to_dummy_hcd(hcd);
1266 spin_lock_irqsave(&dum_hcd->dum->lock, flags);
1267
1268 rc = usb_hcd_check_unlink_urb(hcd, urb, status);
1269 if (!rc && dum_hcd->rh_state != DUMMY_RH_RUNNING &&
1270 !list_empty(&dum_hcd->urbp_list))
1271 mod_timer(&dum_hcd->timer, jiffies);
1272
1273 spin_unlock_irqrestore(&dum_hcd->dum->lock, flags);
1274 return rc;
1275}
1276
1277static int dummy_perform_transfer(struct urb *urb, struct dummy_request *req,
1278 u32 len)
1279{
1280 void *ubuf, *rbuf;
1281 struct urbp *urbp = urb->hcpriv;
1282 int to_host;
1283 struct sg_mapping_iter *miter = &urbp->miter;
1284 u32 trans = 0;
1285 u32 this_sg;
1286 bool next_sg;
1287
1288 to_host = usb_pipein(urb->pipe);
1289 rbuf = req->req.buf + req->req.actual;
1290
1291 if (!urb->num_sgs) {
1292 ubuf = urb->transfer_buffer + urb->actual_length;
1293 if (to_host)
1294 memcpy(ubuf, rbuf, len);
1295 else
1296 memcpy(rbuf, ubuf, len);
1297 return len;
1298 }
1299
1300 if (!urbp->miter_started) {
1301 u32 flags = SG_MITER_ATOMIC;
1302
1303 if (to_host)
1304 flags |= SG_MITER_TO_SG;
1305 else
1306 flags |= SG_MITER_FROM_SG;
1307
1308 sg_miter_start(miter, urb->sg, urb->num_sgs, flags);
1309 urbp->miter_started = 1;
1310 }
1311 next_sg = sg_miter_next(miter);
1312 if (next_sg == false) {
1313 WARN_ON_ONCE(1);
1314 return -EINVAL;
1315 }
1316 do {
1317 ubuf = miter->addr;
1318 this_sg = min_t(u32, len, miter->length);
1319 miter->consumed = this_sg;
1320 trans += this_sg;
1321
1322 if (to_host)
1323 memcpy(ubuf, rbuf, this_sg);
1324 else
1325 memcpy(rbuf, ubuf, this_sg);
1326 len -= this_sg;
1327
1328 if (!len)
1329 break;
1330 next_sg = sg_miter_next(miter);
1331 if (next_sg == false) {
1332 WARN_ON_ONCE(1);
1333 return -EINVAL;
1334 }
1335
1336 rbuf += this_sg;
1337 } while (1);
1338
1339 sg_miter_stop(miter);
1340 return trans;
1341}
1342
1343
1344static int transfer(struct dummy_hcd *dum_hcd, struct urb *urb,
1345 struct dummy_ep *ep, int limit, int *status)
1346{
1347 struct dummy *dum = dum_hcd->dum;
1348 struct dummy_request *req;
1349 int sent = 0;
1350
1351top:
1352
1353 list_for_each_entry(req, &ep->queue, queue) {
1354 unsigned host_len, dev_len, len;
1355 int is_short, to_host;
1356 int rescan = 0;
1357
1358 if (dummy_ep_stream_en(dum_hcd, urb)) {
1359 if ((urb->stream_id != req->req.stream_id))
1360 continue;
1361 }
1362
1363
1364
1365
1366
1367
1368
1369
1370 host_len = urb->transfer_buffer_length - urb->actual_length;
1371 dev_len = req->req.length - req->req.actual;
1372 len = min(host_len, dev_len);
1373
1374
1375
1376 to_host = usb_pipein(urb->pipe);
1377 if (unlikely(len == 0))
1378 is_short = 1;
1379 else {
1380
1381 if (limit < ep->ep.maxpacket && limit < len)
1382 break;
1383 len = min_t(unsigned, len, limit);
1384 if (len == 0)
1385 break;
1386
1387
1388 if (len >= ep->ep.maxpacket) {
1389 is_short = 0;
1390 if (len % ep->ep.maxpacket)
1391 rescan = 1;
1392 len -= len % ep->ep.maxpacket;
1393 } else {
1394 is_short = 1;
1395 }
1396
1397 len = dummy_perform_transfer(urb, req, len);
1398
1399 ep->last_io = jiffies;
1400 if ((int)len < 0) {
1401 req->req.status = len;
1402 } else {
1403 limit -= len;
1404 sent += len;
1405 urb->actual_length += len;
1406 req->req.actual += len;
1407 }
1408 }
1409
1410
1411
1412
1413
1414
1415
1416
1417 if (is_short) {
1418 if (host_len == dev_len) {
1419 req->req.status = 0;
1420 *status = 0;
1421 } else if (to_host) {
1422 req->req.status = 0;
1423 if (dev_len > host_len)
1424 *status = -EOVERFLOW;
1425 else
1426 *status = 0;
1427 } else {
1428 *status = 0;
1429 if (host_len > dev_len)
1430 req->req.status = -EOVERFLOW;
1431 else
1432 req->req.status = 0;
1433 }
1434
1435
1436
1437
1438
1439 } else {
1440 if (req->req.length == req->req.actual) {
1441 if (req->req.zero && to_host)
1442 rescan = 1;
1443 else
1444 req->req.status = 0;
1445 }
1446 if (urb->transfer_buffer_length == urb->actual_length) {
1447 if (urb->transfer_flags & URB_ZERO_PACKET &&
1448 !to_host)
1449 rescan = 1;
1450 else
1451 *status = 0;
1452 }
1453 }
1454
1455
1456 if (req->req.status != -EINPROGRESS) {
1457 list_del_init(&req->queue);
1458
1459 spin_unlock(&dum->lock);
1460 usb_gadget_giveback_request(&ep->ep, &req->req);
1461 spin_lock(&dum->lock);
1462
1463
1464 rescan = 1;
1465 }
1466
1467
1468 if (*status != -EINPROGRESS)
1469 break;
1470
1471
1472 if (rescan)
1473 goto top;
1474 }
1475 return sent;
1476}
1477
1478static int periodic_bytes(struct dummy *dum, struct dummy_ep *ep)
1479{
1480 int limit = ep->ep.maxpacket;
1481
1482 if (dum->gadget.speed == USB_SPEED_HIGH) {
1483 int tmp;
1484
1485
1486 tmp = usb_endpoint_maxp(ep->desc);
1487 tmp = (tmp >> 11) & 0x03;
1488 tmp *= 8 ;
1489 limit += limit * tmp;
1490 }
1491 if (dum->gadget.speed == USB_SPEED_SUPER) {
1492 switch (usb_endpoint_type(ep->desc)) {
1493 case USB_ENDPOINT_XFER_ISOC:
1494
1495 limit = 3 * 16 * 1024 * 8;
1496 break;
1497 case USB_ENDPOINT_XFER_INT:
1498
1499 limit = 3 * 1024 * 8;
1500 break;
1501 case USB_ENDPOINT_XFER_BULK:
1502 default:
1503 break;
1504 }
1505 }
1506 return limit;
1507}
1508
1509#define is_active(dum_hcd) ((dum_hcd->port_status & \
1510 (USB_PORT_STAT_CONNECTION | USB_PORT_STAT_ENABLE | \
1511 USB_PORT_STAT_SUSPEND)) \
1512 == (USB_PORT_STAT_CONNECTION | USB_PORT_STAT_ENABLE))
1513
1514static struct dummy_ep *find_endpoint(struct dummy *dum, u8 address)
1515{
1516 int i;
1517
1518 if (!is_active((dum->gadget.speed == USB_SPEED_SUPER ?
1519 dum->ss_hcd : dum->hs_hcd)))
1520 return NULL;
1521 if ((address & ~USB_DIR_IN) == 0)
1522 return &dum->ep[0];
1523 for (i = 1; i < DUMMY_ENDPOINTS; i++) {
1524 struct dummy_ep *ep = &dum->ep[i];
1525
1526 if (!ep->desc)
1527 continue;
1528 if (ep->desc->bEndpointAddress == address)
1529 return ep;
1530 }
1531 return NULL;
1532}
1533
1534#undef is_active
1535
1536#define Dev_Request (USB_TYPE_STANDARD | USB_RECIP_DEVICE)
1537#define Dev_InRequest (Dev_Request | USB_DIR_IN)
1538#define Intf_Request (USB_TYPE_STANDARD | USB_RECIP_INTERFACE)
1539#define Intf_InRequest (Intf_Request | USB_DIR_IN)
1540#define Ep_Request (USB_TYPE_STANDARD | USB_RECIP_ENDPOINT)
1541#define Ep_InRequest (Ep_Request | USB_DIR_IN)
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556static int handle_control_request(struct dummy_hcd *dum_hcd, struct urb *urb,
1557 struct usb_ctrlrequest *setup,
1558 int *status)
1559{
1560 struct dummy_ep *ep2;
1561 struct dummy *dum = dum_hcd->dum;
1562 int ret_val = 1;
1563 unsigned w_index;
1564 unsigned w_value;
1565
1566 w_index = le16_to_cpu(setup->wIndex);
1567 w_value = le16_to_cpu(setup->wValue);
1568 switch (setup->bRequest) {
1569 case USB_REQ_SET_ADDRESS:
1570 if (setup->bRequestType != Dev_Request)
1571 break;
1572 dum->address = w_value;
1573 *status = 0;
1574 dev_dbg(udc_dev(dum), "set_address = %d\n",
1575 w_value);
1576 ret_val = 0;
1577 break;
1578 case USB_REQ_SET_FEATURE:
1579 if (setup->bRequestType == Dev_Request) {
1580 ret_val = 0;
1581 switch (w_value) {
1582 case USB_DEVICE_REMOTE_WAKEUP:
1583 break;
1584 case USB_DEVICE_B_HNP_ENABLE:
1585 dum->gadget.b_hnp_enable = 1;
1586 break;
1587 case USB_DEVICE_A_HNP_SUPPORT:
1588 dum->gadget.a_hnp_support = 1;
1589 break;
1590 case USB_DEVICE_A_ALT_HNP_SUPPORT:
1591 dum->gadget.a_alt_hnp_support = 1;
1592 break;
1593 case USB_DEVICE_U1_ENABLE:
1594 if (dummy_hcd_to_hcd(dum_hcd)->speed ==
1595 HCD_USB3)
1596 w_value = USB_DEV_STAT_U1_ENABLED;
1597 else
1598 ret_val = -EOPNOTSUPP;
1599 break;
1600 case USB_DEVICE_U2_ENABLE:
1601 if (dummy_hcd_to_hcd(dum_hcd)->speed ==
1602 HCD_USB3)
1603 w_value = USB_DEV_STAT_U2_ENABLED;
1604 else
1605 ret_val = -EOPNOTSUPP;
1606 break;
1607 case USB_DEVICE_LTM_ENABLE:
1608 if (dummy_hcd_to_hcd(dum_hcd)->speed ==
1609 HCD_USB3)
1610 w_value = USB_DEV_STAT_LTM_ENABLED;
1611 else
1612 ret_val = -EOPNOTSUPP;
1613 break;
1614 default:
1615 ret_val = -EOPNOTSUPP;
1616 }
1617 if (ret_val == 0) {
1618 dum->devstatus |= (1 << w_value);
1619 *status = 0;
1620 }
1621 } else if (setup->bRequestType == Ep_Request) {
1622
1623 ep2 = find_endpoint(dum, w_index);
1624 if (!ep2 || ep2->ep.name == ep0name) {
1625 ret_val = -EOPNOTSUPP;
1626 break;
1627 }
1628 ep2->halted = 1;
1629 ret_val = 0;
1630 *status = 0;
1631 }
1632 break;
1633 case USB_REQ_CLEAR_FEATURE:
1634 if (setup->bRequestType == Dev_Request) {
1635 ret_val = 0;
1636 switch (w_value) {
1637 case USB_DEVICE_REMOTE_WAKEUP:
1638 w_value = USB_DEVICE_REMOTE_WAKEUP;
1639 break;
1640 case USB_DEVICE_U1_ENABLE:
1641 if (dummy_hcd_to_hcd(dum_hcd)->speed ==
1642 HCD_USB3)
1643 w_value = USB_DEV_STAT_U1_ENABLED;
1644 else
1645 ret_val = -EOPNOTSUPP;
1646 break;
1647 case USB_DEVICE_U2_ENABLE:
1648 if (dummy_hcd_to_hcd(dum_hcd)->speed ==
1649 HCD_USB3)
1650 w_value = USB_DEV_STAT_U2_ENABLED;
1651 else
1652 ret_val = -EOPNOTSUPP;
1653 break;
1654 case USB_DEVICE_LTM_ENABLE:
1655 if (dummy_hcd_to_hcd(dum_hcd)->speed ==
1656 HCD_USB3)
1657 w_value = USB_DEV_STAT_LTM_ENABLED;
1658 else
1659 ret_val = -EOPNOTSUPP;
1660 break;
1661 default:
1662 ret_val = -EOPNOTSUPP;
1663 break;
1664 }
1665 if (ret_val == 0) {
1666 dum->devstatus &= ~(1 << w_value);
1667 *status = 0;
1668 }
1669 } else if (setup->bRequestType == Ep_Request) {
1670
1671 ep2 = find_endpoint(dum, w_index);
1672 if (!ep2) {
1673 ret_val = -EOPNOTSUPP;
1674 break;
1675 }
1676 if (!ep2->wedged)
1677 ep2->halted = 0;
1678 ret_val = 0;
1679 *status = 0;
1680 }
1681 break;
1682 case USB_REQ_GET_STATUS:
1683 if (setup->bRequestType == Dev_InRequest
1684 || setup->bRequestType == Intf_InRequest
1685 || setup->bRequestType == Ep_InRequest) {
1686 char *buf;
1687
1688
1689
1690
1691
1692 buf = (char *)urb->transfer_buffer;
1693 if (urb->transfer_buffer_length > 0) {
1694 if (setup->bRequestType == Ep_InRequest) {
1695 ep2 = find_endpoint(dum, w_index);
1696 if (!ep2) {
1697 ret_val = -EOPNOTSUPP;
1698 break;
1699 }
1700 buf[0] = ep2->halted;
1701 } else if (setup->bRequestType ==
1702 Dev_InRequest) {
1703 buf[0] = (u8)dum->devstatus;
1704 } else
1705 buf[0] = 0;
1706 }
1707 if (urb->transfer_buffer_length > 1)
1708 buf[1] = 0;
1709 urb->actual_length = min_t(u32, 2,
1710 urb->transfer_buffer_length);
1711 ret_val = 0;
1712 *status = 0;
1713 }
1714 break;
1715 }
1716 return ret_val;
1717}
1718
1719
1720
1721
1722static void dummy_timer(unsigned long _dum_hcd)
1723{
1724 struct dummy_hcd *dum_hcd = (struct dummy_hcd *) _dum_hcd;
1725 struct dummy *dum = dum_hcd->dum;
1726 struct urbp *urbp, *tmp;
1727 unsigned long flags;
1728 int limit, total;
1729 int i;
1730
1731
1732 switch (dum->gadget.speed) {
1733 case USB_SPEED_LOW:
1734 total = 8 * 12;
1735 break;
1736 case USB_SPEED_FULL:
1737 total = 64 * 19;
1738 break;
1739 case USB_SPEED_HIGH:
1740 total = 512 * 13 * 8;
1741 break;
1742 case USB_SPEED_SUPER:
1743
1744 total = 490000;
1745 break;
1746 default:
1747 dev_err(dummy_dev(dum_hcd), "bogus device speed\n");
1748 return;
1749 }
1750
1751
1752
1753
1754 spin_lock_irqsave(&dum->lock, flags);
1755
1756 if (!dum_hcd->udev) {
1757 dev_err(dummy_dev(dum_hcd),
1758 "timer fired with no URBs pending?\n");
1759 spin_unlock_irqrestore(&dum->lock, flags);
1760 return;
1761 }
1762
1763 for (i = 0; i < DUMMY_ENDPOINTS; i++) {
1764 if (!ep_info[i].name)
1765 break;
1766 dum->ep[i].already_seen = 0;
1767 }
1768
1769restart:
1770 list_for_each_entry_safe(urbp, tmp, &dum_hcd->urbp_list, urbp_list) {
1771 struct urb *urb;
1772 struct dummy_request *req;
1773 u8 address;
1774 struct dummy_ep *ep = NULL;
1775 int type;
1776 int status = -EINPROGRESS;
1777
1778 urb = urbp->urb;
1779 if (urb->unlinked)
1780 goto return_urb;
1781 else if (dum_hcd->rh_state != DUMMY_RH_RUNNING)
1782 continue;
1783 type = usb_pipetype(urb->pipe);
1784
1785
1786
1787
1788
1789 if (total <= 0 && type == PIPE_BULK)
1790 continue;
1791
1792
1793 address = usb_pipeendpoint (urb->pipe);
1794 if (usb_pipein(urb->pipe))
1795 address |= USB_DIR_IN;
1796 ep = find_endpoint(dum, address);
1797 if (!ep) {
1798
1799 dev_dbg(dummy_dev(dum_hcd),
1800 "no ep configured for urb %p\n",
1801 urb);
1802 status = -EPROTO;
1803 goto return_urb;
1804 }
1805
1806 if (ep->already_seen)
1807 continue;
1808 ep->already_seen = 1;
1809 if (ep == &dum->ep[0] && urb->error_count) {
1810 ep->setup_stage = 1;
1811 urb->error_count = 0;
1812 }
1813 if (ep->halted && !ep->setup_stage) {
1814
1815 dev_dbg(dummy_dev(dum_hcd), "ep %s halted, urb %p\n",
1816 ep->ep.name, urb);
1817 status = -EPIPE;
1818 goto return_urb;
1819 }
1820
1821
1822
1823 if (ep == &dum->ep[0] && ep->setup_stage) {
1824 struct usb_ctrlrequest setup;
1825 int value = 1;
1826
1827 setup = *(struct usb_ctrlrequest *) urb->setup_packet;
1828
1829 list_for_each_entry(req, &ep->queue, queue) {
1830 list_del_init(&req->queue);
1831 req->req.status = -EOVERFLOW;
1832 dev_dbg(udc_dev(dum), "stale req = %p\n",
1833 req);
1834
1835 spin_unlock(&dum->lock);
1836 usb_gadget_giveback_request(&ep->ep, &req->req);
1837 spin_lock(&dum->lock);
1838 ep->already_seen = 0;
1839 goto restart;
1840 }
1841
1842
1843
1844
1845
1846 ep->last_io = jiffies;
1847 ep->setup_stage = 0;
1848 ep->halted = 0;
1849
1850 value = handle_control_request(dum_hcd, urb, &setup,
1851 &status);
1852
1853
1854
1855
1856 if (value > 0) {
1857 spin_unlock(&dum->lock);
1858 value = dum->driver->setup(&dum->gadget,
1859 &setup);
1860 spin_lock(&dum->lock);
1861
1862 if (value >= 0) {
1863
1864 limit = 64*1024;
1865 goto treat_control_like_bulk;
1866 }
1867
1868 }
1869
1870 if (value < 0) {
1871 if (value != -EOPNOTSUPP)
1872 dev_dbg(udc_dev(dum),
1873 "setup --> %d\n",
1874 value);
1875 status = -EPIPE;
1876 urb->actual_length = 0;
1877 }
1878
1879 goto return_urb;
1880 }
1881
1882
1883 limit = total;
1884 switch (usb_pipetype(urb->pipe)) {
1885 case PIPE_ISOCHRONOUS:
1886
1887
1888
1889
1890
1891 limit = max(limit, periodic_bytes(dum, ep));
1892 status = -ENOSYS;
1893 break;
1894
1895 case PIPE_INTERRUPT:
1896
1897
1898
1899 limit = max(limit, periodic_bytes(dum, ep));
1900
1901
1902 default:
1903treat_control_like_bulk:
1904 ep->last_io = jiffies;
1905 total -= transfer(dum_hcd, urb, ep, limit, &status);
1906 break;
1907 }
1908
1909
1910 if (status == -EINPROGRESS)
1911 continue;
1912
1913return_urb:
1914 list_del(&urbp->urbp_list);
1915 kfree(urbp);
1916 if (ep)
1917 ep->already_seen = ep->setup_stage = 0;
1918
1919 usb_hcd_unlink_urb_from_ep(dummy_hcd_to_hcd(dum_hcd), urb);
1920 spin_unlock(&dum->lock);
1921 usb_hcd_giveback_urb(dummy_hcd_to_hcd(dum_hcd), urb, status);
1922 spin_lock(&dum->lock);
1923
1924 goto restart;
1925 }
1926
1927 if (list_empty(&dum_hcd->urbp_list)) {
1928 usb_put_dev(dum_hcd->udev);
1929 dum_hcd->udev = NULL;
1930 } else if (dum_hcd->rh_state == DUMMY_RH_RUNNING) {
1931
1932 mod_timer(&dum_hcd->timer, jiffies + msecs_to_jiffies(1));
1933 }
1934
1935 spin_unlock_irqrestore(&dum->lock, flags);
1936}
1937
1938
1939
1940#define PORT_C_MASK \
1941 ((USB_PORT_STAT_C_CONNECTION \
1942 | USB_PORT_STAT_C_ENABLE \
1943 | USB_PORT_STAT_C_SUSPEND \
1944 | USB_PORT_STAT_C_OVERCURRENT \
1945 | USB_PORT_STAT_C_RESET) << 16)
1946
1947static int dummy_hub_status(struct usb_hcd *hcd, char *buf)
1948{
1949 struct dummy_hcd *dum_hcd;
1950 unsigned long flags;
1951 int retval = 0;
1952
1953 dum_hcd = hcd_to_dummy_hcd(hcd);
1954
1955 spin_lock_irqsave(&dum_hcd->dum->lock, flags);
1956 if (!HCD_HW_ACCESSIBLE(hcd))
1957 goto done;
1958
1959 if (dum_hcd->resuming && time_after_eq(jiffies, dum_hcd->re_timeout)) {
1960 dum_hcd->port_status |= (USB_PORT_STAT_C_SUSPEND << 16);
1961 dum_hcd->port_status &= ~USB_PORT_STAT_SUSPEND;
1962 set_link_state(dum_hcd);
1963 }
1964
1965 if ((dum_hcd->port_status & PORT_C_MASK) != 0) {
1966 *buf = (1 << 1);
1967 dev_dbg(dummy_dev(dum_hcd), "port status 0x%08x has changes\n",
1968 dum_hcd->port_status);
1969 retval = 1;
1970 if (dum_hcd->rh_state == DUMMY_RH_SUSPENDED)
1971 usb_hcd_resume_root_hub(hcd);
1972 }
1973done:
1974 spin_unlock_irqrestore(&dum_hcd->dum->lock, flags);
1975 return retval;
1976}
1977
1978
1979static struct {
1980 struct usb_bos_descriptor bos;
1981 struct usb_ss_cap_descriptor ss_cap;
1982} __packed usb3_bos_desc = {
1983
1984 .bos = {
1985 .bLength = USB_DT_BOS_SIZE,
1986 .bDescriptorType = USB_DT_BOS,
1987 .wTotalLength = cpu_to_le16(sizeof(usb3_bos_desc)),
1988 .bNumDeviceCaps = 1,
1989 },
1990 .ss_cap = {
1991 .bLength = USB_DT_USB_SS_CAP_SIZE,
1992 .bDescriptorType = USB_DT_DEVICE_CAPABILITY,
1993 .bDevCapabilityType = USB_SS_CAP_TYPE,
1994 .wSpeedSupported = cpu_to_le16(USB_5GBPS_OPERATION),
1995 .bFunctionalitySupport = ilog2(USB_5GBPS_OPERATION),
1996 },
1997};
1998
1999static inline void
2000ss_hub_descriptor(struct usb_hub_descriptor *desc)
2001{
2002 memset(desc, 0, sizeof *desc);
2003 desc->bDescriptorType = USB_DT_SS_HUB;
2004 desc->bDescLength = 12;
2005 desc->wHubCharacteristics = cpu_to_le16(
2006 HUB_CHAR_INDV_PORT_LPSM |
2007 HUB_CHAR_COMMON_OCPM);
2008 desc->bNbrPorts = 1;
2009 desc->u.ss.bHubHdrDecLat = 0x04;
2010 desc->u.ss.DeviceRemovable = 0xffff;
2011}
2012
2013static inline void hub_descriptor(struct usb_hub_descriptor *desc)
2014{
2015 memset(desc, 0, sizeof *desc);
2016 desc->bDescriptorType = USB_DT_HUB;
2017 desc->bDescLength = 9;
2018 desc->wHubCharacteristics = cpu_to_le16(
2019 HUB_CHAR_INDV_PORT_LPSM |
2020 HUB_CHAR_COMMON_OCPM);
2021 desc->bNbrPorts = 1;
2022 desc->u.hs.DeviceRemovable[0] = 0xff;
2023 desc->u.hs.DeviceRemovable[1] = 0xff;
2024}
2025
2026static int dummy_hub_control(
2027 struct usb_hcd *hcd,
2028 u16 typeReq,
2029 u16 wValue,
2030 u16 wIndex,
2031 char *buf,
2032 u16 wLength
2033) {
2034 struct dummy_hcd *dum_hcd;
2035 int retval = 0;
2036 unsigned long flags;
2037
2038 if (!HCD_HW_ACCESSIBLE(hcd))
2039 return -ETIMEDOUT;
2040
2041 dum_hcd = hcd_to_dummy_hcd(hcd);
2042
2043 spin_lock_irqsave(&dum_hcd->dum->lock, flags);
2044 switch (typeReq) {
2045 case ClearHubFeature:
2046 break;
2047 case ClearPortFeature:
2048 switch (wValue) {
2049 case USB_PORT_FEAT_SUSPEND:
2050 if (hcd->speed == HCD_USB3) {
2051 dev_dbg(dummy_dev(dum_hcd),
2052 "USB_PORT_FEAT_SUSPEND req not "
2053 "supported for USB 3.0 roothub\n");
2054 goto error;
2055 }
2056 if (dum_hcd->port_status & USB_PORT_STAT_SUSPEND) {
2057
2058 dum_hcd->resuming = 1;
2059 dum_hcd->re_timeout = jiffies +
2060 msecs_to_jiffies(20);
2061 }
2062 break;
2063 case USB_PORT_FEAT_POWER:
2064 if (hcd->speed == HCD_USB3) {
2065 if (dum_hcd->port_status & USB_PORT_STAT_POWER)
2066 dev_dbg(dummy_dev(dum_hcd),
2067 "power-off\n");
2068 } else
2069 if (dum_hcd->port_status &
2070 USB_SS_PORT_STAT_POWER)
2071 dev_dbg(dummy_dev(dum_hcd),
2072 "power-off\n");
2073
2074 default:
2075 dum_hcd->port_status &= ~(1 << wValue);
2076 set_link_state(dum_hcd);
2077 }
2078 break;
2079 case GetHubDescriptor:
2080 if (hcd->speed == HCD_USB3 &&
2081 (wLength < USB_DT_SS_HUB_SIZE ||
2082 wValue != (USB_DT_SS_HUB << 8))) {
2083 dev_dbg(dummy_dev(dum_hcd),
2084 "Wrong hub descriptor type for "
2085 "USB 3.0 roothub.\n");
2086 goto error;
2087 }
2088 if (hcd->speed == HCD_USB3)
2089 ss_hub_descriptor((struct usb_hub_descriptor *) buf);
2090 else
2091 hub_descriptor((struct usb_hub_descriptor *) buf);
2092 break;
2093
2094 case DeviceRequest | USB_REQ_GET_DESCRIPTOR:
2095 if (hcd->speed != HCD_USB3)
2096 goto error;
2097
2098 if ((wValue >> 8) != USB_DT_BOS)
2099 goto error;
2100
2101 memcpy(buf, &usb3_bos_desc, sizeof(usb3_bos_desc));
2102 retval = sizeof(usb3_bos_desc);
2103 break;
2104
2105 case GetHubStatus:
2106 *(__le32 *) buf = cpu_to_le32(0);
2107 break;
2108 case GetPortStatus:
2109 if (wIndex != 1)
2110 retval = -EPIPE;
2111
2112
2113
2114
2115 if (dum_hcd->resuming &&
2116 time_after_eq(jiffies, dum_hcd->re_timeout)) {
2117 dum_hcd->port_status |= (USB_PORT_STAT_C_SUSPEND << 16);
2118 dum_hcd->port_status &= ~USB_PORT_STAT_SUSPEND;
2119 }
2120 if ((dum_hcd->port_status & USB_PORT_STAT_RESET) != 0 &&
2121 time_after_eq(jiffies, dum_hcd->re_timeout)) {
2122 dum_hcd->port_status |= (USB_PORT_STAT_C_RESET << 16);
2123 dum_hcd->port_status &= ~USB_PORT_STAT_RESET;
2124 if (dum_hcd->dum->pullup) {
2125 dum_hcd->port_status |= USB_PORT_STAT_ENABLE;
2126
2127 if (hcd->speed < HCD_USB3) {
2128 switch (dum_hcd->dum->gadget.speed) {
2129 case USB_SPEED_HIGH:
2130 dum_hcd->port_status |=
2131 USB_PORT_STAT_HIGH_SPEED;
2132 break;
2133 case USB_SPEED_LOW:
2134 dum_hcd->dum->gadget.ep0->
2135 maxpacket = 8;
2136 dum_hcd->port_status |=
2137 USB_PORT_STAT_LOW_SPEED;
2138 break;
2139 default:
2140 dum_hcd->dum->gadget.speed =
2141 USB_SPEED_FULL;
2142 break;
2143 }
2144 }
2145 }
2146 }
2147 set_link_state(dum_hcd);
2148 ((__le16 *) buf)[0] = cpu_to_le16(dum_hcd->port_status);
2149 ((__le16 *) buf)[1] = cpu_to_le16(dum_hcd->port_status >> 16);
2150 break;
2151 case SetHubFeature:
2152 retval = -EPIPE;
2153 break;
2154 case SetPortFeature:
2155 switch (wValue) {
2156 case USB_PORT_FEAT_LINK_STATE:
2157 if (hcd->speed != HCD_USB3) {
2158 dev_dbg(dummy_dev(dum_hcd),
2159 "USB_PORT_FEAT_LINK_STATE req not "
2160 "supported for USB 2.0 roothub\n");
2161 goto error;
2162 }
2163
2164
2165
2166
2167 break;
2168 case USB_PORT_FEAT_U1_TIMEOUT:
2169 case USB_PORT_FEAT_U2_TIMEOUT:
2170
2171 if (hcd->speed != HCD_USB3) {
2172 dev_dbg(dummy_dev(dum_hcd),
2173 "USB_PORT_FEAT_U1/2_TIMEOUT req not "
2174 "supported for USB 2.0 roothub\n");
2175 goto error;
2176 }
2177 break;
2178 case USB_PORT_FEAT_SUSPEND:
2179
2180 if (hcd->speed == HCD_USB3) {
2181 dev_dbg(dummy_dev(dum_hcd),
2182 "USB_PORT_FEAT_SUSPEND req not "
2183 "supported for USB 3.0 roothub\n");
2184 goto error;
2185 }
2186 if (dum_hcd->active) {
2187 dum_hcd->port_status |= USB_PORT_STAT_SUSPEND;
2188
2189
2190
2191
2192 set_link_state(dum_hcd);
2193 if (((1 << USB_DEVICE_B_HNP_ENABLE)
2194 & dum_hcd->dum->devstatus) != 0)
2195 dev_dbg(dummy_dev(dum_hcd),
2196 "no HNP yet!\n");
2197 }
2198 break;
2199 case USB_PORT_FEAT_POWER:
2200 if (hcd->speed == HCD_USB3)
2201 dum_hcd->port_status |= USB_SS_PORT_STAT_POWER;
2202 else
2203 dum_hcd->port_status |= USB_PORT_STAT_POWER;
2204 set_link_state(dum_hcd);
2205 break;
2206 case USB_PORT_FEAT_BH_PORT_RESET:
2207
2208 if (hcd->speed != HCD_USB3) {
2209 dev_dbg(dummy_dev(dum_hcd),
2210 "USB_PORT_FEAT_BH_PORT_RESET req not "
2211 "supported for USB 2.0 roothub\n");
2212 goto error;
2213 }
2214
2215 case USB_PORT_FEAT_RESET:
2216
2217 if (hcd->speed == HCD_USB3) {
2218 dum_hcd->port_status = 0;
2219 dum_hcd->port_status =
2220 (USB_SS_PORT_STAT_POWER |
2221 USB_PORT_STAT_CONNECTION |
2222 USB_PORT_STAT_RESET);
2223 } else
2224 dum_hcd->port_status &= ~(USB_PORT_STAT_ENABLE
2225 | USB_PORT_STAT_LOW_SPEED
2226 | USB_PORT_STAT_HIGH_SPEED);
2227
2228
2229
2230
2231 dum_hcd->dum->devstatus &=
2232 (1 << USB_DEVICE_SELF_POWERED);
2233
2234
2235
2236
2237 dum_hcd->re_timeout = jiffies + msecs_to_jiffies(50);
2238
2239 default:
2240 if (hcd->speed == HCD_USB3) {
2241 if ((dum_hcd->port_status &
2242 USB_SS_PORT_STAT_POWER) != 0) {
2243 dum_hcd->port_status |= (1 << wValue);
2244 set_link_state(dum_hcd);
2245 }
2246 } else
2247 if ((dum_hcd->port_status &
2248 USB_PORT_STAT_POWER) != 0) {
2249 dum_hcd->port_status |= (1 << wValue);
2250 set_link_state(dum_hcd);
2251 }
2252 }
2253 break;
2254 case GetPortErrorCount:
2255 if (hcd->speed != HCD_USB3) {
2256 dev_dbg(dummy_dev(dum_hcd),
2257 "GetPortErrorCount req not "
2258 "supported for USB 2.0 roothub\n");
2259 goto error;
2260 }
2261
2262 *(__le32 *) buf = cpu_to_le32(0);
2263 break;
2264 case SetHubDepth:
2265 if (hcd->speed != HCD_USB3) {
2266 dev_dbg(dummy_dev(dum_hcd),
2267 "SetHubDepth req not supported for "
2268 "USB 2.0 roothub\n");
2269 goto error;
2270 }
2271 break;
2272 default:
2273 dev_dbg(dummy_dev(dum_hcd),
2274 "hub control req%04x v%04x i%04x l%d\n",
2275 typeReq, wValue, wIndex, wLength);
2276error:
2277
2278 retval = -EPIPE;
2279 }
2280 spin_unlock_irqrestore(&dum_hcd->dum->lock, flags);
2281
2282 if ((dum_hcd->port_status & PORT_C_MASK) != 0)
2283 usb_hcd_poll_rh_status(hcd);
2284 return retval;
2285}
2286
2287static int dummy_bus_suspend(struct usb_hcd *hcd)
2288{
2289 struct dummy_hcd *dum_hcd = hcd_to_dummy_hcd(hcd);
2290
2291 dev_dbg(&hcd->self.root_hub->dev, "%s\n", __func__);
2292
2293 spin_lock_irq(&dum_hcd->dum->lock);
2294 dum_hcd->rh_state = DUMMY_RH_SUSPENDED;
2295 set_link_state(dum_hcd);
2296 hcd->state = HC_STATE_SUSPENDED;
2297 spin_unlock_irq(&dum_hcd->dum->lock);
2298 return 0;
2299}
2300
2301static int dummy_bus_resume(struct usb_hcd *hcd)
2302{
2303 struct dummy_hcd *dum_hcd = hcd_to_dummy_hcd(hcd);
2304 int rc = 0;
2305
2306 dev_dbg(&hcd->self.root_hub->dev, "%s\n", __func__);
2307
2308 spin_lock_irq(&dum_hcd->dum->lock);
2309 if (!HCD_HW_ACCESSIBLE(hcd)) {
2310 rc = -ESHUTDOWN;
2311 } else {
2312 dum_hcd->rh_state = DUMMY_RH_RUNNING;
2313 set_link_state(dum_hcd);
2314 if (!list_empty(&dum_hcd->urbp_list))
2315 mod_timer(&dum_hcd->timer, jiffies);
2316 hcd->state = HC_STATE_RUNNING;
2317 }
2318 spin_unlock_irq(&dum_hcd->dum->lock);
2319 return rc;
2320}
2321
2322
2323
2324static inline ssize_t show_urb(char *buf, size_t size, struct urb *urb)
2325{
2326 int ep = usb_pipeendpoint(urb->pipe);
2327
2328 return snprintf(buf, size,
2329 "urb/%p %s ep%d%s%s len %d/%d\n",
2330 urb,
2331 ({ char *s;
2332 switch (urb->dev->speed) {
2333 case USB_SPEED_LOW:
2334 s = "ls";
2335 break;
2336 case USB_SPEED_FULL:
2337 s = "fs";
2338 break;
2339 case USB_SPEED_HIGH:
2340 s = "hs";
2341 break;
2342 case USB_SPEED_SUPER:
2343 s = "ss";
2344 break;
2345 default:
2346 s = "?";
2347 break;
2348 } s; }),
2349 ep, ep ? (usb_pipein(urb->pipe) ? "in" : "out") : "",
2350 ({ char *s; \
2351 switch (usb_pipetype(urb->pipe)) { \
2352 case PIPE_CONTROL: \
2353 s = ""; \
2354 break; \
2355 case PIPE_BULK: \
2356 s = "-bulk"; \
2357 break; \
2358 case PIPE_INTERRUPT: \
2359 s = "-int"; \
2360 break; \
2361 default: \
2362 s = "-iso"; \
2363 break; \
2364 } s; }),
2365 urb->actual_length, urb->transfer_buffer_length);
2366}
2367
2368static ssize_t urbs_show(struct device *dev, struct device_attribute *attr,
2369 char *buf)
2370{
2371 struct usb_hcd *hcd = dev_get_drvdata(dev);
2372 struct dummy_hcd *dum_hcd = hcd_to_dummy_hcd(hcd);
2373 struct urbp *urbp;
2374 size_t size = 0;
2375 unsigned long flags;
2376
2377 spin_lock_irqsave(&dum_hcd->dum->lock, flags);
2378 list_for_each_entry(urbp, &dum_hcd->urbp_list, urbp_list) {
2379 size_t temp;
2380
2381 temp = show_urb(buf, PAGE_SIZE - size, urbp->urb);
2382 buf += temp;
2383 size += temp;
2384 }
2385 spin_unlock_irqrestore(&dum_hcd->dum->lock, flags);
2386
2387 return size;
2388}
2389static DEVICE_ATTR_RO(urbs);
2390
2391static int dummy_start_ss(struct dummy_hcd *dum_hcd)
2392{
2393 init_timer(&dum_hcd->timer);
2394 dum_hcd->timer.function = dummy_timer;
2395 dum_hcd->timer.data = (unsigned long)dum_hcd;
2396 dum_hcd->rh_state = DUMMY_RH_RUNNING;
2397 dum_hcd->stream_en_ep = 0;
2398 INIT_LIST_HEAD(&dum_hcd->urbp_list);
2399 dummy_hcd_to_hcd(dum_hcd)->power_budget = POWER_BUDGET;
2400 dummy_hcd_to_hcd(dum_hcd)->state = HC_STATE_RUNNING;
2401 dummy_hcd_to_hcd(dum_hcd)->uses_new_polling = 1;
2402#ifdef CONFIG_USB_OTG
2403 dummy_hcd_to_hcd(dum_hcd)->self.otg_port = 1;
2404#endif
2405 return 0;
2406
2407
2408 return device_create_file(dummy_dev(dum_hcd), &dev_attr_urbs);
2409}
2410
2411static int dummy_start(struct usb_hcd *hcd)
2412{
2413 struct dummy_hcd *dum_hcd = hcd_to_dummy_hcd(hcd);
2414
2415
2416
2417
2418
2419
2420 if (!usb_hcd_is_primary_hcd(hcd))
2421 return dummy_start_ss(dum_hcd);
2422
2423 spin_lock_init(&dum_hcd->dum->lock);
2424 init_timer(&dum_hcd->timer);
2425 dum_hcd->timer.function = dummy_timer;
2426 dum_hcd->timer.data = (unsigned long)dum_hcd;
2427 dum_hcd->rh_state = DUMMY_RH_RUNNING;
2428
2429 INIT_LIST_HEAD(&dum_hcd->urbp_list);
2430
2431 hcd->power_budget = POWER_BUDGET;
2432 hcd->state = HC_STATE_RUNNING;
2433 hcd->uses_new_polling = 1;
2434
2435#ifdef CONFIG_USB_OTG
2436 hcd->self.otg_port = 1;
2437#endif
2438
2439
2440 return device_create_file(dummy_dev(dum_hcd), &dev_attr_urbs);
2441}
2442
2443static void dummy_stop(struct usb_hcd *hcd)
2444{
2445 device_remove_file(dummy_dev(hcd_to_dummy_hcd(hcd)), &dev_attr_urbs);
2446 dev_info(dummy_dev(hcd_to_dummy_hcd(hcd)), "stopped\n");
2447}
2448
2449
2450
2451static int dummy_h_get_frame(struct usb_hcd *hcd)
2452{
2453 return dummy_g_get_frame(NULL);
2454}
2455
2456static int dummy_setup(struct usb_hcd *hcd)
2457{
2458 struct dummy *dum;
2459
2460 dum = *((void **)dev_get_platdata(hcd->self.controller));
2461 hcd->self.sg_tablesize = ~0;
2462 if (usb_hcd_is_primary_hcd(hcd)) {
2463 dum->hs_hcd = hcd_to_dummy_hcd(hcd);
2464 dum->hs_hcd->dum = dum;
2465
2466
2467
2468
2469
2470 hcd->speed = HCD_USB2;
2471 hcd->self.root_hub->speed = USB_SPEED_HIGH;
2472 } else {
2473 dum->ss_hcd = hcd_to_dummy_hcd(hcd);
2474 dum->ss_hcd->dum = dum;
2475 hcd->speed = HCD_USB3;
2476 hcd->self.root_hub->speed = USB_SPEED_SUPER;
2477 }
2478 return 0;
2479}
2480
2481
2482static int dummy_alloc_streams(struct usb_hcd *hcd, struct usb_device *udev,
2483 struct usb_host_endpoint **eps, unsigned int num_eps,
2484 unsigned int num_streams, gfp_t mem_flags)
2485{
2486 struct dummy_hcd *dum_hcd = hcd_to_dummy_hcd(hcd);
2487 unsigned long flags;
2488 int max_stream;
2489 int ret_streams = num_streams;
2490 unsigned int index;
2491 unsigned int i;
2492
2493 if (!num_eps)
2494 return -EINVAL;
2495
2496 spin_lock_irqsave(&dum_hcd->dum->lock, flags);
2497 for (i = 0; i < num_eps; i++) {
2498 index = dummy_get_ep_idx(&eps[i]->desc);
2499 if ((1 << index) & dum_hcd->stream_en_ep) {
2500 ret_streams = -EINVAL;
2501 goto out;
2502 }
2503 max_stream = usb_ss_max_streams(&eps[i]->ss_ep_comp);
2504 if (!max_stream) {
2505 ret_streams = -EINVAL;
2506 goto out;
2507 }
2508 if (max_stream < ret_streams) {
2509 dev_dbg(dummy_dev(dum_hcd), "Ep 0x%x only supports %u "
2510 "stream IDs.\n",
2511 eps[i]->desc.bEndpointAddress,
2512 max_stream);
2513 ret_streams = max_stream;
2514 }
2515 }
2516
2517 for (i = 0; i < num_eps; i++) {
2518 index = dummy_get_ep_idx(&eps[i]->desc);
2519 dum_hcd->stream_en_ep |= 1 << index;
2520 set_max_streams_for_pipe(dum_hcd,
2521 usb_endpoint_num(&eps[i]->desc), ret_streams);
2522 }
2523out:
2524 spin_unlock_irqrestore(&dum_hcd->dum->lock, flags);
2525 return ret_streams;
2526}
2527
2528
2529static int dummy_free_streams(struct usb_hcd *hcd, struct usb_device *udev,
2530 struct usb_host_endpoint **eps, unsigned int num_eps,
2531 gfp_t mem_flags)
2532{
2533 struct dummy_hcd *dum_hcd = hcd_to_dummy_hcd(hcd);
2534 unsigned long flags;
2535 int ret;
2536 unsigned int index;
2537 unsigned int i;
2538
2539 spin_lock_irqsave(&dum_hcd->dum->lock, flags);
2540 for (i = 0; i < num_eps; i++) {
2541 index = dummy_get_ep_idx(&eps[i]->desc);
2542 if (!((1 << index) & dum_hcd->stream_en_ep)) {
2543 ret = -EINVAL;
2544 goto out;
2545 }
2546 }
2547
2548 for (i = 0; i < num_eps; i++) {
2549 index = dummy_get_ep_idx(&eps[i]->desc);
2550 dum_hcd->stream_en_ep &= ~(1 << index);
2551 set_max_streams_for_pipe(dum_hcd,
2552 usb_endpoint_num(&eps[i]->desc), 0);
2553 }
2554 ret = 0;
2555out:
2556 spin_unlock_irqrestore(&dum_hcd->dum->lock, flags);
2557 return ret;
2558}
2559
2560static struct hc_driver dummy_hcd = {
2561 .description = (char *) driver_name,
2562 .product_desc = "Dummy host controller",
2563 .hcd_priv_size = sizeof(struct dummy_hcd),
2564
2565 .flags = HCD_USB3 | HCD_SHARED,
2566
2567 .reset = dummy_setup,
2568 .start = dummy_start,
2569 .stop = dummy_stop,
2570
2571 .urb_enqueue = dummy_urb_enqueue,
2572 .urb_dequeue = dummy_urb_dequeue,
2573
2574 .get_frame_number = dummy_h_get_frame,
2575
2576 .hub_status_data = dummy_hub_status,
2577 .hub_control = dummy_hub_control,
2578 .bus_suspend = dummy_bus_suspend,
2579 .bus_resume = dummy_bus_resume,
2580
2581 .alloc_streams = dummy_alloc_streams,
2582 .free_streams = dummy_free_streams,
2583};
2584
2585static int dummy_hcd_probe(struct platform_device *pdev)
2586{
2587 struct dummy *dum;
2588 struct usb_hcd *hs_hcd;
2589 struct usb_hcd *ss_hcd;
2590 int retval;
2591
2592 dev_info(&pdev->dev, "%s, driver " DRIVER_VERSION "\n", driver_desc);
2593 dum = *((void **)dev_get_platdata(&pdev->dev));
2594
2595 if (!mod_data.is_super_speed)
2596 dummy_hcd.flags = HCD_USB2;
2597 hs_hcd = usb_create_hcd(&dummy_hcd, &pdev->dev, dev_name(&pdev->dev));
2598 if (!hs_hcd)
2599 return -ENOMEM;
2600 hs_hcd->has_tt = 1;
2601
2602 retval = usb_add_hcd(hs_hcd, 0, 0);
2603 if (retval)
2604 goto put_usb2_hcd;
2605
2606 if (mod_data.is_super_speed) {
2607 ss_hcd = usb_create_shared_hcd(&dummy_hcd, &pdev->dev,
2608 dev_name(&pdev->dev), hs_hcd);
2609 if (!ss_hcd) {
2610 retval = -ENOMEM;
2611 goto dealloc_usb2_hcd;
2612 }
2613
2614 retval = usb_add_hcd(ss_hcd, 0, 0);
2615 if (retval)
2616 goto put_usb3_hcd;
2617 }
2618 return 0;
2619
2620put_usb3_hcd:
2621 usb_put_hcd(ss_hcd);
2622dealloc_usb2_hcd:
2623 usb_remove_hcd(hs_hcd);
2624put_usb2_hcd:
2625 usb_put_hcd(hs_hcd);
2626 dum->hs_hcd = dum->ss_hcd = NULL;
2627 return retval;
2628}
2629
2630static int dummy_hcd_remove(struct platform_device *pdev)
2631{
2632 struct dummy *dum;
2633
2634 dum = hcd_to_dummy_hcd(platform_get_drvdata(pdev))->dum;
2635
2636 if (dum->ss_hcd) {
2637 usb_remove_hcd(dummy_hcd_to_hcd(dum->ss_hcd));
2638 usb_put_hcd(dummy_hcd_to_hcd(dum->ss_hcd));
2639 }
2640
2641 usb_remove_hcd(dummy_hcd_to_hcd(dum->hs_hcd));
2642 usb_put_hcd(dummy_hcd_to_hcd(dum->hs_hcd));
2643
2644 dum->hs_hcd = NULL;
2645 dum->ss_hcd = NULL;
2646
2647 return 0;
2648}
2649
2650static int dummy_hcd_suspend(struct platform_device *pdev, pm_message_t state)
2651{
2652 struct usb_hcd *hcd;
2653 struct dummy_hcd *dum_hcd;
2654 int rc = 0;
2655
2656 dev_dbg(&pdev->dev, "%s\n", __func__);
2657
2658 hcd = platform_get_drvdata(pdev);
2659 dum_hcd = hcd_to_dummy_hcd(hcd);
2660 if (dum_hcd->rh_state == DUMMY_RH_RUNNING) {
2661 dev_warn(&pdev->dev, "Root hub isn't suspended!\n");
2662 rc = -EBUSY;
2663 } else
2664 clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
2665 return rc;
2666}
2667
2668static int dummy_hcd_resume(struct platform_device *pdev)
2669{
2670 struct usb_hcd *hcd;
2671
2672 dev_dbg(&pdev->dev, "%s\n", __func__);
2673
2674 hcd = platform_get_drvdata(pdev);
2675 set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
2676 usb_hcd_poll_rh_status(hcd);
2677 return 0;
2678}
2679
2680static struct platform_driver dummy_hcd_driver = {
2681 .probe = dummy_hcd_probe,
2682 .remove = dummy_hcd_remove,
2683 .suspend = dummy_hcd_suspend,
2684 .resume = dummy_hcd_resume,
2685 .driver = {
2686 .name = (char *) driver_name,
2687 },
2688};
2689
2690
2691#define MAX_NUM_UDC 2
2692static struct platform_device *the_udc_pdev[MAX_NUM_UDC];
2693static struct platform_device *the_hcd_pdev[MAX_NUM_UDC];
2694
2695static int __init init(void)
2696{
2697 int retval = -ENOMEM;
2698 int i;
2699 struct dummy *dum[MAX_NUM_UDC];
2700
2701 if (usb_disabled())
2702 return -ENODEV;
2703
2704 if (!mod_data.is_high_speed && mod_data.is_super_speed)
2705 return -EINVAL;
2706
2707 if (mod_data.num < 1 || mod_data.num > MAX_NUM_UDC) {
2708 pr_err("Number of emulated UDC must be in range of 1...%d\n",
2709 MAX_NUM_UDC);
2710 return -EINVAL;
2711 }
2712
2713 for (i = 0; i < mod_data.num; i++) {
2714 the_hcd_pdev[i] = platform_device_alloc(driver_name, i);
2715 if (!the_hcd_pdev[i]) {
2716 i--;
2717 while (i >= 0)
2718 platform_device_put(the_hcd_pdev[i--]);
2719 return retval;
2720 }
2721 }
2722 for (i = 0; i < mod_data.num; i++) {
2723 the_udc_pdev[i] = platform_device_alloc(gadget_name, i);
2724 if (!the_udc_pdev[i]) {
2725 i--;
2726 while (i >= 0)
2727 platform_device_put(the_udc_pdev[i--]);
2728 goto err_alloc_udc;
2729 }
2730 }
2731 for (i = 0; i < mod_data.num; i++) {
2732 dum[i] = kzalloc(sizeof(struct dummy), GFP_KERNEL);
2733 if (!dum[i]) {
2734 retval = -ENOMEM;
2735 goto err_add_pdata;
2736 }
2737 retval = platform_device_add_data(the_hcd_pdev[i], &dum[i],
2738 sizeof(void *));
2739 if (retval)
2740 goto err_add_pdata;
2741 retval = platform_device_add_data(the_udc_pdev[i], &dum[i],
2742 sizeof(void *));
2743 if (retval)
2744 goto err_add_pdata;
2745 }
2746
2747 retval = platform_driver_register(&dummy_hcd_driver);
2748 if (retval < 0)
2749 goto err_add_pdata;
2750 retval = platform_driver_register(&dummy_udc_driver);
2751 if (retval < 0)
2752 goto err_register_udc_driver;
2753
2754 for (i = 0; i < mod_data.num; i++) {
2755 retval = platform_device_add(the_hcd_pdev[i]);
2756 if (retval < 0) {
2757 i--;
2758 while (i >= 0)
2759 platform_device_del(the_hcd_pdev[i--]);
2760 goto err_add_hcd;
2761 }
2762 }
2763 for (i = 0; i < mod_data.num; i++) {
2764 if (!dum[i]->hs_hcd ||
2765 (!dum[i]->ss_hcd && mod_data.is_super_speed)) {
2766
2767
2768
2769
2770 retval = -EINVAL;
2771 goto err_add_udc;
2772 }
2773 }
2774
2775 for (i = 0; i < mod_data.num; i++) {
2776 retval = platform_device_add(the_udc_pdev[i]);
2777 if (retval < 0) {
2778 i--;
2779 while (i >= 0)
2780 platform_device_del(the_udc_pdev[i]);
2781 goto err_add_udc;
2782 }
2783 }
2784
2785 for (i = 0; i < mod_data.num; i++) {
2786 if (!platform_get_drvdata(the_udc_pdev[i])) {
2787
2788
2789
2790
2791 retval = -EINVAL;
2792 goto err_probe_udc;
2793 }
2794 }
2795 return retval;
2796
2797err_probe_udc:
2798 for (i = 0; i < mod_data.num; i++)
2799 platform_device_del(the_udc_pdev[i]);
2800err_add_udc:
2801 for (i = 0; i < mod_data.num; i++)
2802 platform_device_del(the_hcd_pdev[i]);
2803err_add_hcd:
2804 platform_driver_unregister(&dummy_udc_driver);
2805err_register_udc_driver:
2806 platform_driver_unregister(&dummy_hcd_driver);
2807err_add_pdata:
2808 for (i = 0; i < mod_data.num; i++)
2809 kfree(dum[i]);
2810 for (i = 0; i < mod_data.num; i++)
2811 platform_device_put(the_udc_pdev[i]);
2812err_alloc_udc:
2813 for (i = 0; i < mod_data.num; i++)
2814 platform_device_put(the_hcd_pdev[i]);
2815 return retval;
2816}
2817module_init(init);
2818
2819static void __exit cleanup(void)
2820{
2821 int i;
2822
2823 for (i = 0; i < mod_data.num; i++) {
2824 struct dummy *dum;
2825
2826 dum = *((void **)dev_get_platdata(&the_udc_pdev[i]->dev));
2827
2828 platform_device_unregister(the_udc_pdev[i]);
2829 platform_device_unregister(the_hcd_pdev[i]);
2830 kfree(dum);
2831 }
2832 platform_driver_unregister(&dummy_udc_driver);
2833 platform_driver_unregister(&dummy_hcd_driver);
2834}
2835module_exit(cleanup);
2836