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[S390] Remove error checking from copy_oldmem_page()
[linux/fpc-iii.git] / drivers / usb / gadget / dummy_hcd.c
blobab8f1b488d549c10e1eabcda52bc59eaf17979f1
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
15
16 /*
17 * This exposes a device side "USB gadget" API, driven by requests to a
18 * Linux-USB host controller driver. USB traffic is simulated; there's
19 * no need for USB hardware. Use this with two other drivers:
20 *
21 * - Gadget driver, responding to requests (slave);
22 * - Host-side device driver, as already familiar in Linux.
23 *
24 * Having this all in one kernel can help some stages of development,
25 * bypassing some hardware (and driver) issues. UML could help too.
26 */
27
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
43 #include <asm/byteorder.h>
44 #include <asm/io.h>
45 #include <asm/irq.h>
46 #include <asm/system.h>
47 #include <asm/unaligned.h>
48
49
50 #define DRIVER_DESC "USB Host+Gadget Emulator"
51 #define DRIVER_VERSION "02 May 2005"
52
53 #define POWER_BUDGET 500 /* in mA; use 8 for low-power port testing */
54
55 static const char driver_name [] = "dummy_hcd";
56 static const char driver_desc [] = "USB Host+Gadget Emulator";
57
58 static const char gadget_name [] = "dummy_udc";
59
60 MODULE_DESCRIPTION (DRIVER_DESC);
61 MODULE_AUTHOR ("David Brownell");
62 MODULE_LICENSE ("GPL");
63
64 struct dummy_hcd_module_parameters {
65 bool is_super_speed;
66 bool is_high_speed;
67 };
68
69 static struct dummy_hcd_module_parameters mod_data = {
70 .is_super_speed = false,
71 .is_high_speed = true,
72 };
73 module_param_named(is_super_speed, mod_data.is_super_speed, bool, S_IRUGO);
74 MODULE_PARM_DESC(is_super_speed, "true to simulate SuperSpeed connection");
75 module_param_named(is_high_speed, mod_data.is_high_speed, bool, S_IRUGO);
76 MODULE_PARM_DESC(is_high_speed, "true to simulate HighSpeed connection");
77 /*-------------------------------------------------------------------------*/
78
79 /* gadget side driver data structres */
80 struct dummy_ep {
81 struct list_head queue;
82 unsigned long last_io; /* jiffies timestamp */
83 struct usb_gadget *gadget;
84 const struct usb_endpoint_descriptor *desc;
85 struct usb_ep ep;
86 unsigned halted : 1;
87 unsigned wedged : 1;
88 unsigned already_seen : 1;
89 unsigned setup_stage : 1;
90 };
91
92 struct dummy_request {
93 struct list_head queue; /* ep's requests */
94 struct usb_request req;
95 };
96
97 static inline struct dummy_ep *usb_ep_to_dummy_ep (struct usb_ep *_ep)
98 {
99 return container_of (_ep, struct dummy_ep, ep);
100 }
101
102 static inline struct dummy_request *usb_request_to_dummy_request
103 (struct usb_request *_req)
104 {
105 return container_of (_req, struct dummy_request, req);
106 }
107
108 /*-------------------------------------------------------------------------*/
109
110 /*
111 * Every device has ep0 for control requests, plus up to 30 more endpoints,
112 * in one of two types:
113 *
114 * - Configurable: direction (in/out), type (bulk, iso, etc), and endpoint
115 * number can be changed. Names like "ep-a" are used for this type.
116 *
117 * - Fixed Function: in other cases. some characteristics may be mutable;
118 * that'd be hardware-specific. Names like "ep12out-bulk" are used.
119 *
120 * Gadget drivers are responsible for not setting up conflicting endpoint
121 * configurations, illegal or unsupported packet lengths, and so on.
122 */
123
124 static const char ep0name [] = "ep0";
125
126 static const char *const ep_name [] = {
127 ep0name, /* everyone has ep0 */
128
129 /* act like a net2280: high speed, six configurable endpoints */
130 "ep-a", "ep-b", "ep-c", "ep-d", "ep-e", "ep-f",
131
132 /* or like pxa250: fifteen fixed function endpoints */
133 "ep1in-bulk", "ep2out-bulk", "ep3in-iso", "ep4out-iso", "ep5in-int",
134 "ep6in-bulk", "ep7out-bulk", "ep8in-iso", "ep9out-iso", "ep10in-int",
135 "ep11in-bulk", "ep12out-bulk", "ep13in-iso", "ep14out-iso",
136 "ep15in-int",
137
138 /* or like sa1100: two fixed function endpoints */
139 "ep1out-bulk", "ep2in-bulk",
140 };
141 #define DUMMY_ENDPOINTS ARRAY_SIZE(ep_name)
142
143 /*-------------------------------------------------------------------------*/
144
145 #define FIFO_SIZE 64
146
147 struct urbp {
148 struct urb *urb;
149 struct list_head urbp_list;
150 };
151
152
153 enum dummy_rh_state {
154 DUMMY_RH_RESET,
155 DUMMY_RH_SUSPENDED,
156 DUMMY_RH_RUNNING
157 };
158
159 struct dummy_hcd {
160 struct dummy *dum;
161 enum dummy_rh_state rh_state;
162 struct timer_list timer;
163 u32 port_status;
164 u32 old_status;
165 unsigned long re_timeout;
166
167 struct usb_device *udev;
168 struct list_head urbp_list;
169
170 unsigned active:1;
171 unsigned old_active:1;
172 unsigned resuming:1;
173 };
174
175 struct dummy {
176 spinlock_t lock;
177
178 /*
179 * SLAVE/GADGET side support
180 */
181 struct dummy_ep ep [DUMMY_ENDPOINTS];
182 int address;
183 struct usb_gadget gadget;
184 struct usb_gadget_driver *driver;
185 struct dummy_request fifo_req;
186 u8 fifo_buf [FIFO_SIZE];
187 u16 devstatus;
188 unsigned udc_suspended:1;
189 unsigned pullup:1;
190
191 /*
192 * MASTER/HOST side support
193 */
194 struct dummy_hcd *hs_hcd;
195 struct dummy_hcd *ss_hcd;
196 };
197
198 static inline struct dummy_hcd *hcd_to_dummy_hcd(struct usb_hcd *hcd)
199 {
200 return (struct dummy_hcd *) (hcd->hcd_priv);
201 }
202
203 static inline struct usb_hcd *dummy_hcd_to_hcd(struct dummy_hcd *dum)
204 {
205 return container_of((void *) dum, struct usb_hcd, hcd_priv);
206 }
207
208 static inline struct device *dummy_dev(struct dummy_hcd *dum)
209 {
210 return dummy_hcd_to_hcd(dum)->self.controller;
211 }
212
213 static inline struct device *udc_dev (struct dummy *dum)
214 {
215 return dum->gadget.dev.parent;
216 }
217
218 static inline struct dummy *ep_to_dummy (struct dummy_ep *ep)
219 {
220 return container_of (ep->gadget, struct dummy, gadget);
221 }
222
223 static inline struct dummy_hcd *gadget_to_dummy_hcd(struct usb_gadget *gadget)
224 {
225 struct dummy *dum = container_of(gadget, struct dummy, gadget);
226 if (dum->gadget.speed == USB_SPEED_SUPER)
227 return dum->ss_hcd;
228 else
229 return dum->hs_hcd;
230 }
231
232 static inline struct dummy *gadget_dev_to_dummy (struct device *dev)
233 {
234 return container_of (dev, struct dummy, gadget.dev);
235 }
236
237 static struct dummy the_controller;
238
239 /*-------------------------------------------------------------------------*/
240
241 /* SLAVE/GADGET SIDE UTILITY ROUTINES */
242
243 /* called with spinlock held */
244 static void nuke (struct dummy *dum, struct dummy_ep *ep)
245 {
246 while (!list_empty (&ep->queue)) {
247 struct dummy_request *req;
248
249 req = list_entry (ep->queue.next, struct dummy_request, queue);
250 list_del_init (&req->queue);
251 req->req.status = -ESHUTDOWN;
252
253 spin_unlock (&dum->lock);
254 req->req.complete (&ep->ep, &req->req);
255 spin_lock (&dum->lock);
256 }
257 }
258
259 /* caller must hold lock */
260 static void
261 stop_activity (struct dummy *dum)
262 {
263 struct dummy_ep *ep;
264
265 /* prevent any more requests */
266 dum->address = 0;
267
268 /* The timer is left running so that outstanding URBs can fail */
269
270 /* nuke any pending requests first, so driver i/o is quiesced */
271 list_for_each_entry (ep, &dum->gadget.ep_list, ep.ep_list)
272 nuke (dum, ep);
273
274 /* driver now does any non-usb quiescing necessary */
275 }
276
277 /**
278 * set_link_state_by_speed() - Sets the current state of the link according to
279 * the hcd speed
280 * @dum_hcd: pointer to the dummy_hcd structure to update the link state for
281 *
282 * This function updates the port_status according to the link state and the
283 * speed of the hcd.
284 */
285 static void set_link_state_by_speed(struct dummy_hcd *dum_hcd)
286 {
287 struct dummy *dum = dum_hcd->dum;
288
289 if (dummy_hcd_to_hcd(dum_hcd)->speed == HCD_USB3) {
290 if ((dum_hcd->port_status & USB_SS_PORT_STAT_POWER) == 0) {
291 dum_hcd->port_status = 0;
292 } else if (!dum->pullup || dum->udc_suspended) {
293 /* UDC suspend must cause a disconnect */
294 dum_hcd->port_status &= ~(USB_PORT_STAT_CONNECTION |
295 USB_PORT_STAT_ENABLE);
296 if ((dum_hcd->old_status &
297 USB_PORT_STAT_CONNECTION) != 0)
298 dum_hcd->port_status |=
299 (USB_PORT_STAT_C_CONNECTION << 16);
300 } else {
301 /* device is connected and not suspended */
302 dum_hcd->port_status |= (USB_PORT_STAT_CONNECTION |
303 USB_PORT_STAT_SPEED_5GBPS) ;
304 if ((dum_hcd->old_status &
305 USB_PORT_STAT_CONNECTION) == 0)
306 dum_hcd->port_status |=
307 (USB_PORT_STAT_C_CONNECTION << 16);
308 if ((dum_hcd->port_status &
309 USB_PORT_STAT_ENABLE) == 1 &&
310 (dum_hcd->port_status &
311 USB_SS_PORT_LS_U0) == 1 &&
312 dum_hcd->rh_state != DUMMY_RH_SUSPENDED)
313 dum_hcd->active = 1;
314 }
315 } else {
316 if ((dum_hcd->port_status & USB_PORT_STAT_POWER) == 0) {
317 dum_hcd->port_status = 0;
318 } else if (!dum->pullup || dum->udc_suspended) {
319 /* UDC suspend must cause a disconnect */
320 dum_hcd->port_status &= ~(USB_PORT_STAT_CONNECTION |
321 USB_PORT_STAT_ENABLE |
322 USB_PORT_STAT_LOW_SPEED |
323 USB_PORT_STAT_HIGH_SPEED |
324 USB_PORT_STAT_SUSPEND);
325 if ((dum_hcd->old_status &
326 USB_PORT_STAT_CONNECTION) != 0)
327 dum_hcd->port_status |=
328 (USB_PORT_STAT_C_CONNECTION << 16);
329 } else {
330 dum_hcd->port_status |= USB_PORT_STAT_CONNECTION;
331 if ((dum_hcd->old_status &
332 USB_PORT_STAT_CONNECTION) == 0)
333 dum_hcd->port_status |=
334 (USB_PORT_STAT_C_CONNECTION << 16);
335 if ((dum_hcd->port_status & USB_PORT_STAT_ENABLE) == 0)
336 dum_hcd->port_status &= ~USB_PORT_STAT_SUSPEND;
337 else if ((dum_hcd->port_status &
338 USB_PORT_STAT_SUSPEND) == 0 &&
339 dum_hcd->rh_state != DUMMY_RH_SUSPENDED)
340 dum_hcd->active = 1;
341 }
342 }
343 }
344
345 /* caller must hold lock */
346 static void set_link_state(struct dummy_hcd *dum_hcd)
347 {
348 struct dummy *dum = dum_hcd->dum;
349
350 dum_hcd->active = 0;
351 if (dum->pullup)
352 if ((dummy_hcd_to_hcd(dum_hcd)->speed == HCD_USB3 &&
353 dum->gadget.speed != USB_SPEED_SUPER) ||
354 (dummy_hcd_to_hcd(dum_hcd)->speed != HCD_USB3 &&
355 dum->gadget.speed == USB_SPEED_SUPER))
356 return;
357
358 set_link_state_by_speed(dum_hcd);
359
360 if ((dum_hcd->port_status & USB_PORT_STAT_ENABLE) == 0 ||
361 dum_hcd->active)
362 dum_hcd->resuming = 0;
363
364 /* if !connected or reset */
365 if ((dum_hcd->port_status & USB_PORT_STAT_CONNECTION) == 0 ||
366 (dum_hcd->port_status & USB_PORT_STAT_RESET) != 0) {
367 /*
368 * We're connected and not reset (reset occurred now),
369 * and driver attached - disconnect!
370 */
371 if ((dum_hcd->old_status & USB_PORT_STAT_CONNECTION) != 0 &&
372 (dum_hcd->old_status & USB_PORT_STAT_RESET) == 0 &&
373 dum->driver) {
374 stop_activity(dum);
375 spin_unlock(&dum->lock);
376 dum->driver->disconnect(&dum->gadget);
377 spin_lock(&dum->lock);
378 }
379 } else if (dum_hcd->active != dum_hcd->old_active) {
380 if (dum_hcd->old_active && dum->driver->suspend) {
381 spin_unlock(&dum->lock);
382 dum->driver->suspend(&dum->gadget);
383 spin_lock(&dum->lock);
384 } else if (!dum_hcd->old_active && dum->driver->resume) {
385 spin_unlock(&dum->lock);
386 dum->driver->resume(&dum->gadget);
387 spin_lock(&dum->lock);
388 }
389 }
390
391 dum_hcd->old_status = dum_hcd->port_status;
392 dum_hcd->old_active = dum_hcd->active;
393 }
394
395 /*-------------------------------------------------------------------------*/
396
397 /* SLAVE/GADGET SIDE DRIVER
398 *
399 * This only tracks gadget state. All the work is done when the host
400 * side tries some (emulated) i/o operation. Real device controller
401 * drivers would do real i/o using dma, fifos, irqs, timers, etc.
402 */
403
404 #define is_enabled(dum) \
405 (dum->port_status & USB_PORT_STAT_ENABLE)
406
407 static int
408 dummy_enable (struct usb_ep *_ep, const struct usb_endpoint_descriptor *desc)
409 {
410 struct dummy *dum;
411 struct dummy_hcd *dum_hcd;
412 struct dummy_ep *ep;
413 unsigned max;
414 int retval;
415
416 ep = usb_ep_to_dummy_ep (_ep);
417 if (!_ep || !desc || ep->desc || _ep->name == ep0name
418 || desc->bDescriptorType != USB_DT_ENDPOINT)
419 return -EINVAL;
420 dum = ep_to_dummy (ep);
421 if (!dum->driver)
422 return -ESHUTDOWN;
423
424 dum_hcd = gadget_to_dummy_hcd(&dum->gadget);
425 if (!is_enabled(dum_hcd))
426 return -ESHUTDOWN;
427
428 /*
429 * For HS/FS devices only bits 0..10 of the wMaxPacketSize represent the
430 * maximum packet size.
431 * For SS devices the wMaxPacketSize is limited by 1024.
432 */
433 max = usb_endpoint_maxp(desc) & 0x7ff;
434
435 /* drivers must not request bad settings, since lower levels
436 * (hardware or its drivers) may not check. some endpoints
437 * can't do iso, many have maxpacket limitations, etc.
438 *
439 * since this "hardware" driver is here to help debugging, we
440 * have some extra sanity checks. (there could be more though,
441 * especially for "ep9out" style fixed function ones.)
442 */
443 retval = -EINVAL;
444 switch (desc->bmAttributes & 0x03) {
445 case USB_ENDPOINT_XFER_BULK:
446 if (strstr (ep->ep.name, "-iso")
447 || strstr (ep->ep.name, "-int")) {
448 goto done;
449 }
450 switch (dum->gadget.speed) {
451 case USB_SPEED_SUPER:
452 if (max == 1024)
453 break;
454 goto done;
455 case USB_SPEED_HIGH:
456 if (max == 512)
457 break;
458 goto done;
459 case USB_SPEED_FULL:
460 if (max == 8 || max == 16 || max == 32 || max == 64)
461 /* we'll fake any legal size */
462 break;
463 /* save a return statement */
464 default:
465 goto done;
466 }
467 break;
468 case USB_ENDPOINT_XFER_INT:
469 if (strstr (ep->ep.name, "-iso")) /* bulk is ok */
470 goto done;
471 /* real hardware might not handle all packet sizes */
472 switch (dum->gadget.speed) {
473 case USB_SPEED_SUPER:
474 case USB_SPEED_HIGH:
475 if (max <= 1024)
476 break;
477 /* save a return statement */
478 case USB_SPEED_FULL:
479 if (max <= 64)
480 break;
481 /* save a return statement */
482 default:
483 if (max <= 8)
484 break;
485 goto done;
486 }
487 break;
488 case USB_ENDPOINT_XFER_ISOC:
489 if (strstr (ep->ep.name, "-bulk")
490 || strstr (ep->ep.name, "-int"))
491 goto done;
492 /* real hardware might not handle all packet sizes */
493 switch (dum->gadget.speed) {
494 case USB_SPEED_SUPER:
495 case USB_SPEED_HIGH:
496 if (max <= 1024)
497 break;
498 /* save a return statement */
499 case USB_SPEED_FULL:
500 if (max <= 1023)
501 break;
502 /* save a return statement */
503 default:
504 goto done;
505 }
506 break;
507 default:
508 /* few chips support control except on ep0 */
509 goto done;
510 }
511
512 _ep->maxpacket = max;
513 ep->desc = desc;
514
515 dev_dbg (udc_dev(dum), "enabled %s (ep%d%s-%s) maxpacket %d\n",
516 _ep->name,
517 desc->bEndpointAddress & 0x0f,
518 (desc->bEndpointAddress & USB_DIR_IN) ? "in" : "out",
519 ({ char *val;
520 switch (desc->bmAttributes & 0x03) {
521 case USB_ENDPOINT_XFER_BULK:
522 val = "bulk";
523 break;
524 case USB_ENDPOINT_XFER_ISOC:
525 val = "iso";
526 break;
527 case USB_ENDPOINT_XFER_INT:
528 val = "intr";
529 break;
530 default:
531 val = "ctrl";
532 break;
533 }; val; }),
534 max);
535
536 /* at this point real hardware should be NAKing transfers
537 * to that endpoint, until a buffer is queued to it.
538 */
539 ep->halted = ep->wedged = 0;
540 retval = 0;
541 done:
542 return retval;
543 }
544
545 static int dummy_disable (struct usb_ep *_ep)
546 {
547 struct dummy_ep *ep;
548 struct dummy *dum;
549 unsigned long flags;
550 int retval;
551
552 ep = usb_ep_to_dummy_ep (_ep);
553 if (!_ep || !ep->desc || _ep->name == ep0name)
554 return -EINVAL;
555 dum = ep_to_dummy (ep);
556
557 spin_lock_irqsave (&dum->lock, flags);
558 ep->desc = NULL;
559 retval = 0;
560 nuke (dum, ep);
561 spin_unlock_irqrestore (&dum->lock, flags);
562
563 dev_dbg (udc_dev(dum), "disabled %s\n", _ep->name);
564 return retval;
565 }
566
567 static struct usb_request *
568 dummy_alloc_request (struct usb_ep *_ep, gfp_t mem_flags)
569 {
570 struct dummy_ep *ep;
571 struct dummy_request *req;
572
573 if (!_ep)
574 return NULL;
575 ep = usb_ep_to_dummy_ep (_ep);
576
577 req = kzalloc(sizeof(*req), mem_flags);
578 if (!req)
579 return NULL;
580 INIT_LIST_HEAD (&req->queue);
581 return &req->req;
582 }
583
584 static void
585 dummy_free_request (struct usb_ep *_ep, struct usb_request *_req)
586 {
587 struct dummy_ep *ep;
588 struct dummy_request *req;
589
590 ep = usb_ep_to_dummy_ep (_ep);
591 if (!ep || !_req || (!ep->desc && _ep->name != ep0name))
592 return;
593
594 req = usb_request_to_dummy_request (_req);
595 WARN_ON (!list_empty (&req->queue));
596 kfree (req);
597 }
598
599 static void
600 fifo_complete (struct usb_ep *ep, struct usb_request *req)
601 {
602 }
603
604 static int
605 dummy_queue (struct usb_ep *_ep, struct usb_request *_req,
606 gfp_t mem_flags)
607 {
608 struct dummy_ep *ep;
609 struct dummy_request *req;
610 struct dummy *dum;
611 struct dummy_hcd *dum_hcd;
612 unsigned long flags;
613
614 req = usb_request_to_dummy_request (_req);
615 if (!_req || !list_empty (&req->queue) || !_req->complete)
616 return -EINVAL;
617
618 ep = usb_ep_to_dummy_ep (_ep);
619 if (!_ep || (!ep->desc && _ep->name != ep0name))
620 return -EINVAL;
621
622 dum = ep_to_dummy (ep);
623 dum_hcd = gadget_to_dummy_hcd(&dum->gadget);
624 if (!dum->driver || !is_enabled(dum_hcd))
625 return -ESHUTDOWN;
626
627 #if 0
628 dev_dbg (udc_dev(dum), "ep %p queue req %p to %s, len %d buf %p\n",
629 ep, _req, _ep->name, _req->length, _req->buf);
630 #endif
631
632 _req->status = -EINPROGRESS;
633 _req->actual = 0;
634 spin_lock_irqsave (&dum->lock, flags);
635
636 /* implement an emulated single-request FIFO */
637 if (ep->desc && (ep->desc->bEndpointAddress & USB_DIR_IN) &&
638 list_empty (&dum->fifo_req.queue) &&
639 list_empty (&ep->queue) &&
640 _req->length <= FIFO_SIZE) {
641 req = &dum->fifo_req;
642 req->req = *_req;
643 req->req.buf = dum->fifo_buf;
644 memcpy (dum->fifo_buf, _req->buf, _req->length);
645 req->req.context = dum;
646 req->req.complete = fifo_complete;
647
648 list_add_tail(&req->queue, &ep->queue);
649 spin_unlock (&dum->lock);
650 _req->actual = _req->length;
651 _req->status = 0;
652 _req->complete (_ep, _req);
653 spin_lock (&dum->lock);
654 } else
655 list_add_tail(&req->queue, &ep->queue);
656 spin_unlock_irqrestore (&dum->lock, flags);
657
658 /* real hardware would likely enable transfers here, in case
659 * it'd been left NAKing.
660 */
661 return 0;
662 }
663
664 static int dummy_dequeue (struct usb_ep *_ep, struct usb_request *_req)
665 {
666 struct dummy_ep *ep;
667 struct dummy *dum;
668 int retval = -EINVAL;
669 unsigned long flags;
670 struct dummy_request *req = NULL;
671
672 if (!_ep || !_req)
673 return retval;
674 ep = usb_ep_to_dummy_ep (_ep);
675 dum = ep_to_dummy (ep);
676
677 if (!dum->driver)
678 return -ESHUTDOWN;
679
680 local_irq_save (flags);
681 spin_lock (&dum->lock);
682 list_for_each_entry (req, &ep->queue, queue) {
683 if (&req->req == _req) {
684 list_del_init (&req->queue);
685 _req->status = -ECONNRESET;
686 retval = 0;
687 break;
688 }
689 }
690 spin_unlock (&dum->lock);
691
692 if (retval == 0) {
693 dev_dbg (udc_dev(dum),
694 "dequeued req %p from %s, len %d buf %p\n",
695 req, _ep->name, _req->length, _req->buf);
696 _req->complete (_ep, _req);
697 }
698 local_irq_restore (flags);
699 return retval;
700 }
701
702 static int
703 dummy_set_halt_and_wedge(struct usb_ep *_ep, int value, int wedged)
704 {
705 struct dummy_ep *ep;
706 struct dummy *dum;
707
708 if (!_ep)
709 return -EINVAL;
710 ep = usb_ep_to_dummy_ep (_ep);
711 dum = ep_to_dummy (ep);
712 if (!dum->driver)
713 return -ESHUTDOWN;
714 if (!value)
715 ep->halted = ep->wedged = 0;
716 else if (ep->desc && (ep->desc->bEndpointAddress & USB_DIR_IN) &&
717 !list_empty (&ep->queue))
718 return -EAGAIN;
719 else {
720 ep->halted = 1;
721 if (wedged)
722 ep->wedged = 1;
723 }
724 /* FIXME clear emulated data toggle too */
725 return 0;
726 }
727
728 static int
729 dummy_set_halt(struct usb_ep *_ep, int value)
730 {
731 return dummy_set_halt_and_wedge(_ep, value, 0);
732 }
733
734 static int dummy_set_wedge(struct usb_ep *_ep)
735 {
736 if (!_ep || _ep->name == ep0name)
737 return -EINVAL;
738 return dummy_set_halt_and_wedge(_ep, 1, 1);
739 }
740
741 static const struct usb_ep_ops dummy_ep_ops = {
742 .enable = dummy_enable,
743 .disable = dummy_disable,
744
745 .alloc_request = dummy_alloc_request,
746 .free_request = dummy_free_request,
747
748 .queue = dummy_queue,
749 .dequeue = dummy_dequeue,
750
751 .set_halt = dummy_set_halt,
752 .set_wedge = dummy_set_wedge,
753 };
754
755 /*-------------------------------------------------------------------------*/
756
757 /* there are both host and device side versions of this call ... */
758 static int dummy_g_get_frame (struct usb_gadget *_gadget)
759 {
760 struct timeval tv;
761
762 do_gettimeofday (&tv);
763 return tv.tv_usec / 1000;
764 }
765
766 static int dummy_wakeup (struct usb_gadget *_gadget)
767 {
768 struct dummy_hcd *dum_hcd;
769
770 dum_hcd = gadget_to_dummy_hcd(_gadget);
771 if (!(dum_hcd->dum->devstatus & ((1 << USB_DEVICE_B_HNP_ENABLE)
772 | (1 << USB_DEVICE_REMOTE_WAKEUP))))
773 return -EINVAL;
774 if ((dum_hcd->port_status & USB_PORT_STAT_CONNECTION) == 0)
775 return -ENOLINK;
776 if ((dum_hcd->port_status & USB_PORT_STAT_SUSPEND) == 0 &&
777 dum_hcd->rh_state != DUMMY_RH_SUSPENDED)
778 return -EIO;
779
780 /* FIXME: What if the root hub is suspended but the port isn't? */
781
782 /* hub notices our request, issues downstream resume, etc */
783 dum_hcd->resuming = 1;
784 dum_hcd->re_timeout = jiffies + msecs_to_jiffies(20);
785 mod_timer(&dummy_hcd_to_hcd(dum_hcd)->rh_timer, dum_hcd->re_timeout);
786 return 0;
787 }
788
789 static int dummy_set_selfpowered (struct usb_gadget *_gadget, int value)
790 {
791 struct dummy *dum;
792
793 dum = (gadget_to_dummy_hcd(_gadget))->dum;
794 if (value)
795 dum->devstatus |= (1 << USB_DEVICE_SELF_POWERED);
796 else
797 dum->devstatus &= ~(1 << USB_DEVICE_SELF_POWERED);
798 return 0;
799 }
800
801 static void dummy_udc_udpate_ep0(struct dummy *dum)
802 {
803 u32 i;
804
805 if (dum->gadget.speed == USB_SPEED_SUPER) {
806 for (i = 0; i < DUMMY_ENDPOINTS; i++)
807 dum->ep[i].ep.max_streams = 0x10;
808 dum->ep[0].ep.maxpacket = 9;
809 } else {
810 for (i = 0; i < DUMMY_ENDPOINTS; i++)
811 dum->ep[i].ep.max_streams = 0;
812 dum->ep[0].ep.maxpacket = 64;
813 }
814 }
815
816 static int dummy_pullup (struct usb_gadget *_gadget, int value)
817 {
818 struct dummy_hcd *dum_hcd;
819 struct dummy *dum;
820 unsigned long flags;
821
822 dum = gadget_dev_to_dummy(&_gadget->dev);
823
824 if (value && dum->driver) {
825 if (mod_data.is_super_speed)
826 dum->gadget.speed = dum->driver->speed;
827 else if (mod_data.is_high_speed)
828 dum->gadget.speed = min_t(u8, USB_SPEED_HIGH,
829 dum->driver->speed);
830 else
831 dum->gadget.speed = USB_SPEED_FULL;
832 dummy_udc_udpate_ep0(dum);
833
834 if (dum->gadget.speed < dum->driver->speed)
835 dev_dbg(udc_dev(dum), "This device can perform faster"
836 " if you connect it to a %s port...\n",
837 (dum->driver->speed == USB_SPEED_SUPER ?
838 "SuperSpeed" : "HighSpeed"));
839 }
840 dum_hcd = gadget_to_dummy_hcd(_gadget);
841
842 spin_lock_irqsave (&dum->lock, flags);
843 dum->pullup = (value != 0);
844 set_link_state(dum_hcd);
845 spin_unlock_irqrestore (&dum->lock, flags);
846
847 usb_hcd_poll_rh_status(dummy_hcd_to_hcd(dum_hcd));
848 return 0;
849 }
850
851 static int dummy_udc_start(struct usb_gadget *g,
852 struct usb_gadget_driver *driver);
853 static int dummy_udc_stop(struct usb_gadget *g,
854 struct usb_gadget_driver *driver);
855
856 static const struct usb_gadget_ops dummy_ops = {
857 .get_frame = dummy_g_get_frame,
858 .wakeup = dummy_wakeup,
859 .set_selfpowered = dummy_set_selfpowered,
860 .pullup = dummy_pullup,
861 .udc_start = dummy_udc_start,
862 .udc_stop = dummy_udc_stop,
863 };
864
865 /*-------------------------------------------------------------------------*/
866
867 /* "function" sysfs attribute */
868 static ssize_t
869 show_function (struct device *dev, struct device_attribute *attr, char *buf)
870 {
871 struct dummy *dum = gadget_dev_to_dummy (dev);
872
873 if (!dum->driver || !dum->driver->function)
874 return 0;
875 return scnprintf (buf, PAGE_SIZE, "%s\n", dum->driver->function);
876 }
877 static DEVICE_ATTR (function, S_IRUGO, show_function, NULL);
878
879 /*-------------------------------------------------------------------------*/
880
881 /*
882 * Driver registration/unregistration.
883 *
884 * This is basically hardware-specific; there's usually only one real USB
885 * device (not host) controller since that's how USB devices are intended
886 * to work. So most implementations of these api calls will rely on the
887 * fact that only one driver will ever bind to the hardware. But curious
888 * hardware can be built with discrete components, so the gadget API doesn't
889 * require that assumption.
890 *
891 * For this emulator, it might be convenient to create a usb slave device
892 * for each driver that registers: just add to a big root hub.
893 */
894
895 static int dummy_udc_start(struct usb_gadget *g,
896 struct usb_gadget_driver *driver)
897 {
898 struct dummy_hcd *dum_hcd = gadget_to_dummy_hcd(g);
899 struct dummy *dum = dum_hcd->dum;
900
901 if (driver->speed == USB_SPEED_UNKNOWN)
902 return -EINVAL;
903
904 /*
905 * SLAVE side init ... the layer above hardware, which
906 * can't enumerate without help from the driver we're binding.
907 */
908
909 dum->devstatus = 0;
910
911 dum->driver = driver;
912 dev_dbg (udc_dev(dum), "binding gadget driver '%s'\n",
913 driver->driver.name);
914 return 0;
915 }
916
917 static int dummy_udc_stop(struct usb_gadget *g,
918 struct usb_gadget_driver *driver)
919 {
920 struct dummy_hcd *dum_hcd = gadget_to_dummy_hcd(g);
921 struct dummy *dum = dum_hcd->dum;
922
923 dev_dbg (udc_dev(dum), "unregister gadget driver '%s'\n",
924 driver->driver.name);
925
926 dum->driver = NULL;
927
928 dummy_pullup(&dum->gadget, 0);
929 return 0;
930 }
931
932 #undef is_enabled
933
934 /* The gadget structure is stored inside the hcd structure and will be
935 * released along with it. */
936 static void
937 dummy_gadget_release (struct device *dev)
938 {
939 return;
940 }
941
942 static void init_dummy_udc_hw(struct dummy *dum)
943 {
944 int i;
945
946 INIT_LIST_HEAD(&dum->gadget.ep_list);
947 for (i = 0; i < DUMMY_ENDPOINTS; i++) {
948 struct dummy_ep *ep = &dum->ep[i];
949
950 if (!ep_name[i])
951 break;
952 ep->ep.name = ep_name[i];
953 ep->ep.ops = &dummy_ep_ops;
954 list_add_tail(&ep->ep.ep_list, &dum->gadget.ep_list);
955 ep->halted = ep->wedged = ep->already_seen =
956 ep->setup_stage = 0;
957 ep->ep.maxpacket = ~0;
958 ep->last_io = jiffies;
959 ep->gadget = &dum->gadget;
960 ep->desc = NULL;
961 INIT_LIST_HEAD(&ep->queue);
962 }
963
964 dum->gadget.ep0 = &dum->ep[0].ep;
965 list_del_init(&dum->ep[0].ep.ep_list);
966 INIT_LIST_HEAD(&dum->fifo_req.queue);
967
968 #ifdef CONFIG_USB_OTG
969 dum->gadget.is_otg = 1;
970 #endif
971 }
972
973 static int dummy_udc_probe (struct platform_device *pdev)
974 {
975 struct dummy *dum = &the_controller;
976 int rc;
977
978 dum->gadget.name = gadget_name;
979 dum->gadget.ops = &dummy_ops;
980 dum->gadget.is_dualspeed = 1;
981
982 dev_set_name(&dum->gadget.dev, "gadget");
983 dum->gadget.dev.parent = &pdev->dev;
984 dum->gadget.dev.release = dummy_gadget_release;
985 rc = device_register (&dum->gadget.dev);
986 if (rc < 0) {
987 put_device(&dum->gadget.dev);
988 return rc;
989 }
990
991 init_dummy_udc_hw(dum);
992
993 rc = usb_add_gadget_udc(&pdev->dev, &dum->gadget);
994 if (rc < 0)
995 goto err_udc;
996
997 rc = device_create_file (&dum->gadget.dev, &dev_attr_function);
998 if (rc < 0)
999 goto err_dev;
1000 platform_set_drvdata(pdev, dum);
1001 return rc;
1002
1003 err_dev:
1004 usb_del_gadget_udc(&dum->gadget);
1005 err_udc:
1006 device_unregister(&dum->gadget.dev);
1007 return rc;
1008 }
1009
1010 static int dummy_udc_remove (struct platform_device *pdev)
1011 {
1012 struct dummy *dum = platform_get_drvdata (pdev);
1013
1014 usb_del_gadget_udc(&dum->gadget);
1015 platform_set_drvdata (pdev, NULL);
1016 device_remove_file (&dum->gadget.dev, &dev_attr_function);
1017 device_unregister (&dum->gadget.dev);
1018 return 0;
1019 }
1020
1021 static void dummy_udc_pm(struct dummy *dum, struct dummy_hcd *dum_hcd,
1022 int suspend)
1023 {
1024 spin_lock_irq(&dum->lock);
1025 dum->udc_suspended = suspend;
1026 set_link_state(dum_hcd);
1027 spin_unlock_irq(&dum->lock);
1028 }
1029
1030 static int dummy_udc_suspend(struct platform_device *pdev, pm_message_t state)
1031 {
1032 struct dummy *dum = platform_get_drvdata(pdev);
1033 struct dummy_hcd *dum_hcd = gadget_to_dummy_hcd(&dum->gadget);
1034
1035 dev_dbg(&pdev->dev, "%s\n", __func__);
1036 dummy_udc_pm(dum, dum_hcd, 1);
1037 usb_hcd_poll_rh_status(dummy_hcd_to_hcd(dum_hcd));
1038 return 0;
1039 }
1040
1041 static int dummy_udc_resume(struct platform_device *pdev)
1042 {
1043 struct dummy *dum = platform_get_drvdata(pdev);
1044 struct dummy_hcd *dum_hcd = gadget_to_dummy_hcd(&dum->gadget);
1045
1046 dev_dbg(&pdev->dev, "%s\n", __func__);
1047 dummy_udc_pm(dum, dum_hcd, 0);
1048 usb_hcd_poll_rh_status(dummy_hcd_to_hcd(dum_hcd));
1049 return 0;
1050 }
1051
1052 static struct platform_driver dummy_udc_driver = {
1053 .probe = dummy_udc_probe,
1054 .remove = dummy_udc_remove,
1055 .suspend = dummy_udc_suspend,
1056 .resume = dummy_udc_resume,
1057 .driver = {
1058 .name = (char *) gadget_name,
1059 .owner = THIS_MODULE,
1060 },
1061 };
1062
1063 /*-------------------------------------------------------------------------*/
1064
1065 /* MASTER/HOST SIDE DRIVER
1066 *
1067 * this uses the hcd framework to hook up to host side drivers.
1068 * its root hub will only have one device, otherwise it acts like
1069 * a normal host controller.
1070 *
1071 * when urbs are queued, they're just stuck on a list that we
1072 * scan in a timer callback. that callback connects writes from
1073 * the host with reads from the device, and so on, based on the
1074 * usb 2.0 rules.
1075 */
1076
1077 static int dummy_urb_enqueue (
1078 struct usb_hcd *hcd,
1079 struct urb *urb,
1080 gfp_t mem_flags
1081 ) {
1082 struct dummy_hcd *dum_hcd;
1083 struct urbp *urbp;
1084 unsigned long flags;
1085 int rc;
1086
1087 if (!urb->transfer_buffer && urb->transfer_buffer_length)
1088 return -EINVAL;
1089
1090 urbp = kmalloc (sizeof *urbp, mem_flags);
1091 if (!urbp)
1092 return -ENOMEM;
1093 urbp->urb = urb;
1094
1095 dum_hcd = hcd_to_dummy_hcd(hcd);
1096 spin_lock_irqsave(&dum_hcd->dum->lock, flags);
1097 rc = usb_hcd_link_urb_to_ep(hcd, urb);
1098 if (rc) {
1099 kfree(urbp);
1100 goto done;
1101 }
1102
1103 if (!dum_hcd->udev) {
1104 dum_hcd->udev = urb->dev;
1105 usb_get_dev(dum_hcd->udev);
1106 } else if (unlikely(dum_hcd->udev != urb->dev))
1107 dev_err(dummy_dev(dum_hcd), "usb_device address has changed!\n");
1108
1109 list_add_tail(&urbp->urbp_list, &dum_hcd->urbp_list);
1110 urb->hcpriv = urbp;
1111 if (usb_pipetype (urb->pipe) == PIPE_CONTROL)
1112 urb->error_count = 1; /* mark as a new urb */
1113
1114 /* kick the scheduler, it'll do the rest */
1115 if (!timer_pending(&dum_hcd->timer))
1116 mod_timer(&dum_hcd->timer, jiffies + 1);
1117
1118 done:
1119 spin_unlock_irqrestore(&dum_hcd->dum->lock, flags);
1120 return rc;
1121 }
1122
1123 static int dummy_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status)
1124 {
1125 struct dummy_hcd *dum_hcd;
1126 unsigned long flags;
1127 int rc;
1128
1129 /* giveback happens automatically in timer callback,
1130 * so make sure the callback happens */
1131 dum_hcd = hcd_to_dummy_hcd(hcd);
1132 spin_lock_irqsave(&dum_hcd->dum->lock, flags);
1133
1134 rc = usb_hcd_check_unlink_urb(hcd, urb, status);
1135 if (!rc && dum_hcd->rh_state != DUMMY_RH_RUNNING &&
1136 !list_empty(&dum_hcd->urbp_list))
1137 mod_timer(&dum_hcd->timer, jiffies);
1138
1139 spin_unlock_irqrestore(&dum_hcd->dum->lock, flags);
1140 return rc;
1141 }
1142
1143 /* transfer up to a frame's worth; caller must own lock */
1144 static int
1145 transfer(struct dummy *dum, struct urb *urb, struct dummy_ep *ep, int limit,
1146 int *status)
1147 {
1148 struct dummy_request *req;
1149
1150 top:
1151 /* if there's no request queued, the device is NAKing; return */
1152 list_for_each_entry (req, &ep->queue, queue) {
1153 unsigned host_len, dev_len, len;
1154 int is_short, to_host;
1155 int rescan = 0;
1156
1157 /* 1..N packets of ep->ep.maxpacket each ... the last one
1158 * may be short (including zero length).
1159 *
1160 * writer can send a zlp explicitly (length 0) or implicitly
1161 * (length mod maxpacket zero, and 'zero' flag); they always
1162 * terminate reads.
1163 */
1164 host_len = urb->transfer_buffer_length - urb->actual_length;
1165 dev_len = req->req.length - req->req.actual;
1166 len = min (host_len, dev_len);
1167
1168 /* FIXME update emulated data toggle too */
1169
1170 to_host = usb_pipein (urb->pipe);
1171 if (unlikely (len == 0))
1172 is_short = 1;
1173 else {
1174 char *ubuf, *rbuf;
1175
1176 /* not enough bandwidth left? */
1177 if (limit < ep->ep.maxpacket && limit < len)
1178 break;
1179 len = min (len, (unsigned) limit);
1180 if (len == 0)
1181 break;
1182
1183 /* use an extra pass for the final short packet */
1184 if (len > ep->ep.maxpacket) {
1185 rescan = 1;
1186 len -= (len % ep->ep.maxpacket);
1187 }
1188 is_short = (len % ep->ep.maxpacket) != 0;
1189
1190 /* else transfer packet(s) */
1191 ubuf = urb->transfer_buffer + urb->actual_length;
1192 rbuf = req->req.buf + req->req.actual;
1193 if (to_host)
1194 memcpy (ubuf, rbuf, len);
1195 else
1196 memcpy (rbuf, ubuf, len);
1197 ep->last_io = jiffies;
1198
1199 limit -= len;
1200 urb->actual_length += len;
1201 req->req.actual += len;
1202 }
1203
1204 /* short packets terminate, maybe with overflow/underflow.
1205 * it's only really an error to write too much.
1206 *
1207 * partially filling a buffer optionally blocks queue advances
1208 * (so completion handlers can clean up the queue) but we don't
1209 * need to emulate such data-in-flight.
1210 */
1211 if (is_short) {
1212 if (host_len == dev_len) {
1213 req->req.status = 0;
1214 *status = 0;
1215 } else if (to_host) {
1216 req->req.status = 0;
1217 if (dev_len > host_len)
1218 *status = -EOVERFLOW;
1219 else
1220 *status = 0;
1221 } else if (!to_host) {
1222 *status = 0;
1223 if (host_len > dev_len)
1224 req->req.status = -EOVERFLOW;
1225 else
1226 req->req.status = 0;
1227 }
1228
1229 /* many requests terminate without a short packet */
1230 } else {
1231 if (req->req.length == req->req.actual
1232 && !req->req.zero)
1233 req->req.status = 0;
1234 if (urb->transfer_buffer_length == urb->actual_length
1235 && !(urb->transfer_flags
1236 & URB_ZERO_PACKET))
1237 *status = 0;
1238 }
1239
1240 /* device side completion --> continuable */
1241 if (req->req.status != -EINPROGRESS) {
1242 list_del_init (&req->queue);
1243
1244 spin_unlock (&dum->lock);
1245 req->req.complete (&ep->ep, &req->req);
1246 spin_lock (&dum->lock);
1247
1248 /* requests might have been unlinked... */
1249 rescan = 1;
1250 }
1251
1252 /* host side completion --> terminate */
1253 if (*status != -EINPROGRESS)
1254 break;
1255
1256 /* rescan to continue with any other queued i/o */
1257 if (rescan)
1258 goto top;
1259 }
1260 return limit;
1261 }
1262
1263 static int periodic_bytes (struct dummy *dum, struct dummy_ep *ep)
1264 {
1265 int limit = ep->ep.maxpacket;
1266
1267 if (dum->gadget.speed == USB_SPEED_HIGH) {
1268 int tmp;
1269
1270 /* high bandwidth mode */
1271 tmp = usb_endpoint_maxp(ep->desc);
1272 tmp = (tmp >> 11) & 0x03;
1273 tmp *= 8 /* applies to entire frame */;
1274 limit += limit * tmp;
1275 }
1276 if (dum->gadget.speed == USB_SPEED_SUPER) {
1277 switch (ep->desc->bmAttributes & 0x03) {
1278 case USB_ENDPOINT_XFER_ISOC:
1279 /* Sec. 4.4.8.2 USB3.0 Spec */
1280 limit = 3 * 16 * 1024 * 8;
1281 break;
1282 case USB_ENDPOINT_XFER_INT:
1283 /* Sec. 4.4.7.2 USB3.0 Spec */
1284 limit = 3 * 1024 * 8;
1285 break;
1286 case USB_ENDPOINT_XFER_BULK:
1287 default:
1288 break;
1289 }
1290 }
1291 return limit;
1292 }
1293
1294 #define is_active(dum_hcd) ((dum_hcd->port_status & \
1295 (USB_PORT_STAT_CONNECTION | USB_PORT_STAT_ENABLE | \
1296 USB_PORT_STAT_SUSPEND)) \
1297 == (USB_PORT_STAT_CONNECTION | USB_PORT_STAT_ENABLE))
1298
1299 static struct dummy_ep *find_endpoint (struct dummy *dum, u8 address)
1300 {
1301 int i;
1302
1303 if (!is_active((dum->gadget.speed == USB_SPEED_SUPER ?
1304 dum->ss_hcd : dum->hs_hcd)))
1305 return NULL;
1306 if ((address & ~USB_DIR_IN) == 0)
1307 return &dum->ep [0];
1308 for (i = 1; i < DUMMY_ENDPOINTS; i++) {
1309 struct dummy_ep *ep = &dum->ep [i];
1310
1311 if (!ep->desc)
1312 continue;
1313 if (ep->desc->bEndpointAddress == address)
1314 return ep;
1315 }
1316 return NULL;
1317 }
1318
1319 #undef is_active
1320
1321 #define Dev_Request (USB_TYPE_STANDARD | USB_RECIP_DEVICE)
1322 #define Dev_InRequest (Dev_Request | USB_DIR_IN)
1323 #define Intf_Request (USB_TYPE_STANDARD | USB_RECIP_INTERFACE)
1324 #define Intf_InRequest (Intf_Request | USB_DIR_IN)
1325 #define Ep_Request (USB_TYPE_STANDARD | USB_RECIP_ENDPOINT)
1326 #define Ep_InRequest (Ep_Request | USB_DIR_IN)
1327
1328
1329 /**
1330 * handle_control_request() - handles all control transfers
1331 * @dum: pointer to dummy (the_controller)
1332 * @urb: the urb request to handle
1333 * @setup: pointer to the setup data for a USB device control
1334 * request
1335 * @status: pointer to request handling status
1336 *
1337 * Return 0 - if the request was handled
1338 * 1 - if the request wasn't handles
1339 * error code on error
1340 */
1341 static int handle_control_request(struct dummy_hcd *dum_hcd, struct urb *urb,
1342 struct usb_ctrlrequest *setup,
1343 int *status)
1344 {
1345 struct dummy_ep *ep2;
1346 struct dummy *dum = dum_hcd->dum;
1347 int ret_val = 1;
1348 unsigned w_index;
1349 unsigned w_value;
1350
1351 w_index = le16_to_cpu(setup->wIndex);
1352 w_value = le16_to_cpu(setup->wValue);
1353 switch (setup->bRequest) {
1354 case USB_REQ_SET_ADDRESS:
1355 if (setup->bRequestType != Dev_Request)
1356 break;
1357 dum->address = w_value;
1358 *status = 0;
1359 dev_dbg(udc_dev(dum), "set_address = %d\n",
1360 w_value);
1361 ret_val = 0;
1362 break;
1363 case USB_REQ_SET_FEATURE:
1364 if (setup->bRequestType == Dev_Request) {
1365 ret_val = 0;
1366 switch (w_value) {
1367 case USB_DEVICE_REMOTE_WAKEUP:
1368 break;
1369 case USB_DEVICE_B_HNP_ENABLE:
1370 dum->gadget.b_hnp_enable = 1;
1371 break;
1372 case USB_DEVICE_A_HNP_SUPPORT:
1373 dum->gadget.a_hnp_support = 1;
1374 break;
1375 case USB_DEVICE_A_ALT_HNP_SUPPORT:
1376 dum->gadget.a_alt_hnp_support = 1;
1377 break;
1378 case USB_DEVICE_U1_ENABLE:
1379 if (dummy_hcd_to_hcd(dum_hcd)->speed ==
1380 HCD_USB3)
1381 w_value = USB_DEV_STAT_U1_ENABLED;
1382 else
1383 ret_val = -EOPNOTSUPP;
1384 break;
1385 case USB_DEVICE_U2_ENABLE:
1386 if (dummy_hcd_to_hcd(dum_hcd)->speed ==
1387 HCD_USB3)
1388 w_value = USB_DEV_STAT_U2_ENABLED;
1389 else
1390 ret_val = -EOPNOTSUPP;
1391 break;
1392 case USB_DEVICE_LTM_ENABLE:
1393 if (dummy_hcd_to_hcd(dum_hcd)->speed ==
1394 HCD_USB3)
1395 w_value = USB_DEV_STAT_LTM_ENABLED;
1396 else
1397 ret_val = -EOPNOTSUPP;
1398 break;
1399 default:
1400 ret_val = -EOPNOTSUPP;
1401 }
1402 if (ret_val == 0) {
1403 dum->devstatus |= (1 << w_value);
1404 *status = 0;
1405 }
1406 } else if (setup->bRequestType == Ep_Request) {
1407 /* endpoint halt */
1408 ep2 = find_endpoint(dum, w_index);
1409 if (!ep2 || ep2->ep.name == ep0name) {
1410 ret_val = -EOPNOTSUPP;
1411 break;
1412 }
1413 ep2->halted = 1;
1414 ret_val = 0;
1415 *status = 0;
1416 }
1417 break;
1418 case USB_REQ_CLEAR_FEATURE:
1419 if (setup->bRequestType == Dev_Request) {
1420 ret_val = 0;
1421 switch (w_value) {
1422 case USB_DEVICE_REMOTE_WAKEUP:
1423 w_value = USB_DEVICE_REMOTE_WAKEUP;
1424 break;
1425 case USB_DEVICE_U1_ENABLE:
1426 if (dummy_hcd_to_hcd(dum_hcd)->speed ==
1427 HCD_USB3)
1428 w_value = USB_DEV_STAT_U1_ENABLED;
1429 else
1430 ret_val = -EOPNOTSUPP;
1431 break;
1432 case USB_DEVICE_U2_ENABLE:
1433 if (dummy_hcd_to_hcd(dum_hcd)->speed ==
1434 HCD_USB3)
1435 w_value = USB_DEV_STAT_U2_ENABLED;
1436 else
1437 ret_val = -EOPNOTSUPP;
1438 break;
1439 case USB_DEVICE_LTM_ENABLE:
1440 if (dummy_hcd_to_hcd(dum_hcd)->speed ==
1441 HCD_USB3)
1442 w_value = USB_DEV_STAT_LTM_ENABLED;
1443 else
1444 ret_val = -EOPNOTSUPP;
1445 break;
1446 default:
1447 ret_val = -EOPNOTSUPP;
1448 break;
1449 }
1450 if (ret_val == 0) {
1451 dum->devstatus &= ~(1 << w_value);
1452 *status = 0;
1453 }
1454 } else if (setup->bRequestType == Ep_Request) {
1455 /* endpoint halt */
1456 ep2 = find_endpoint(dum, w_index);
1457 if (!ep2) {
1458 ret_val = -EOPNOTSUPP;
1459 break;
1460 }
1461 if (!ep2->wedged)
1462 ep2->halted = 0;
1463 ret_val = 0;
1464 *status = 0;
1465 }
1466 break;
1467 case USB_REQ_GET_STATUS:
1468 if (setup->bRequestType == Dev_InRequest
1469 || setup->bRequestType == Intf_InRequest
1470 || setup->bRequestType == Ep_InRequest) {
1471 char *buf;
1472 /*
1473 * device: remote wakeup, selfpowered
1474 * interface: nothing
1475 * endpoint: halt
1476 */
1477 buf = (char *)urb->transfer_buffer;
1478 if (urb->transfer_buffer_length > 0) {
1479 if (setup->bRequestType == Ep_InRequest) {
1480 ep2 = find_endpoint(dum, w_index);
1481 if (!ep2) {
1482 ret_val = -EOPNOTSUPP;
1483 break;
1484 }
1485 buf[0] = ep2->halted;
1486 } else if (setup->bRequestType ==
1487 Dev_InRequest) {
1488 buf[0] = (u8)dum->devstatus;
1489 } else
1490 buf[0] = 0;
1491 }
1492 if (urb->transfer_buffer_length > 1)
1493 buf[1] = 0;
1494 urb->actual_length = min_t(u32, 2,
1495 urb->transfer_buffer_length);
1496 ret_val = 0;
1497 *status = 0;
1498 }
1499 break;
1500 }
1501 return ret_val;
1502 }
1503
1504 /* drive both sides of the transfers; looks like irq handlers to
1505 * both drivers except the callbacks aren't in_irq().
1506 */
1507 static void dummy_timer(unsigned long _dum_hcd)
1508 {
1509 struct dummy_hcd *dum_hcd = (struct dummy_hcd *) _dum_hcd;
1510 struct dummy *dum = dum_hcd->dum;
1511 struct urbp *urbp, *tmp;
1512 unsigned long flags;
1513 int limit, total;
1514 int i;
1515
1516 /* simplistic model for one frame's bandwidth */
1517 switch (dum->gadget.speed) {
1518 case USB_SPEED_LOW:
1519 total = 8/*bytes*/ * 12/*packets*/;
1520 break;
1521 case USB_SPEED_FULL:
1522 total = 64/*bytes*/ * 19/*packets*/;
1523 break;
1524 case USB_SPEED_HIGH:
1525 total = 512/*bytes*/ * 13/*packets*/ * 8/*uframes*/;
1526 break;
1527 case USB_SPEED_SUPER:
1528 /* Bus speed is 500000 bytes/ms, so use a little less */
1529 total = 490000;
1530 break;
1531 default:
1532 dev_err(dummy_dev(dum_hcd), "bogus device speed\n");
1533 return;
1534 }
1535
1536 /* FIXME if HZ != 1000 this will probably misbehave ... */
1537
1538 /* look at each urb queued by the host side driver */
1539 spin_lock_irqsave (&dum->lock, flags);
1540
1541 if (!dum_hcd->udev) {
1542 dev_err(dummy_dev(dum_hcd),
1543 "timer fired with no URBs pending?\n");
1544 spin_unlock_irqrestore (&dum->lock, flags);
1545 return;
1546 }
1547
1548 for (i = 0; i < DUMMY_ENDPOINTS; i++) {
1549 if (!ep_name [i])
1550 break;
1551 dum->ep [i].already_seen = 0;
1552 }
1553
1554 restart:
1555 list_for_each_entry_safe(urbp, tmp, &dum_hcd->urbp_list, urbp_list) {
1556 struct urb *urb;
1557 struct dummy_request *req;
1558 u8 address;
1559 struct dummy_ep *ep = NULL;
1560 int type;
1561 int status = -EINPROGRESS;
1562
1563 urb = urbp->urb;
1564 if (urb->unlinked)
1565 goto return_urb;
1566 else if (dum_hcd->rh_state != DUMMY_RH_RUNNING)
1567 continue;
1568 type = usb_pipetype (urb->pipe);
1569
1570 /* used up this frame's non-periodic bandwidth?
1571 * FIXME there's infinite bandwidth for control and
1572 * periodic transfers ... unrealistic.
1573 */
1574 if (total <= 0 && type == PIPE_BULK)
1575 continue;
1576
1577 /* find the gadget's ep for this request (if configured) */
1578 address = usb_pipeendpoint (urb->pipe);
1579 if (usb_pipein (urb->pipe))
1580 address |= USB_DIR_IN;
1581 ep = find_endpoint(dum, address);
1582 if (!ep) {
1583 /* set_configuration() disagreement */
1584 dev_dbg(dummy_dev(dum_hcd),
1585 "no ep configured for urb %p\n",
1586 urb);
1587 status = -EPROTO;
1588 goto return_urb;
1589 }
1590
1591 if (ep->already_seen)
1592 continue;
1593 ep->already_seen = 1;
1594 if (ep == &dum->ep [0] && urb->error_count) {
1595 ep->setup_stage = 1; /* a new urb */
1596 urb->error_count = 0;
1597 }
1598 if (ep->halted && !ep->setup_stage) {
1599 /* NOTE: must not be iso! */
1600 dev_dbg(dummy_dev(dum_hcd), "ep %s halted, urb %p\n",
1601 ep->ep.name, urb);
1602 status = -EPIPE;
1603 goto return_urb;
1604 }
1605 /* FIXME make sure both ends agree on maxpacket */
1606
1607 /* handle control requests */
1608 if (ep == &dum->ep [0] && ep->setup_stage) {
1609 struct usb_ctrlrequest setup;
1610 int value = 1;
1611
1612 setup = *(struct usb_ctrlrequest*) urb->setup_packet;
1613 /* paranoia, in case of stale queued data */
1614 list_for_each_entry (req, &ep->queue, queue) {
1615 list_del_init (&req->queue);
1616 req->req.status = -EOVERFLOW;
1617 dev_dbg (udc_dev(dum), "stale req = %p\n",
1618 req);
1619
1620 spin_unlock (&dum->lock);
1621 req->req.complete (&ep->ep, &req->req);
1622 spin_lock (&dum->lock);
1623 ep->already_seen = 0;
1624 goto restart;
1625 }
1626
1627 /* gadget driver never sees set_address or operations
1628 * on standard feature flags. some hardware doesn't
1629 * even expose them.
1630 */
1631 ep->last_io = jiffies;
1632 ep->setup_stage = 0;
1633 ep->halted = 0;
1634
1635 value = handle_control_request(dum_hcd, urb, &setup,
1636 &status);
1637
1638 /* gadget driver handles all other requests. block
1639 * until setup() returns; no reentrancy issues etc.
1640 */
1641 if (value > 0) {
1642 spin_unlock (&dum->lock);
1643 value = dum->driver->setup (&dum->gadget,
1644 &setup);
1645 spin_lock (&dum->lock);
1646
1647 if (value >= 0) {
1648 /* no delays (max 64KB data stage) */
1649 limit = 64*1024;
1650 goto treat_control_like_bulk;
1651 }
1652 /* error, see below */
1653 }
1654
1655 if (value < 0) {
1656 if (value != -EOPNOTSUPP)
1657 dev_dbg (udc_dev(dum),
1658 "setup --> %d\n",
1659 value);
1660 status = -EPIPE;
1661 urb->actual_length = 0;
1662 }
1663
1664 goto return_urb;
1665 }
1666
1667 /* non-control requests */
1668 limit = total;
1669 switch (usb_pipetype (urb->pipe)) {
1670 case PIPE_ISOCHRONOUS:
1671 /* FIXME is it urb->interval since the last xfer?
1672 * use urb->iso_frame_desc[i].
1673 * complete whether or not ep has requests queued.
1674 * report random errors, to debug drivers.
1675 */
1676 limit = max (limit, periodic_bytes (dum, ep));
1677 status = -ENOSYS;
1678 break;
1679
1680 case PIPE_INTERRUPT:
1681 /* FIXME is it urb->interval since the last xfer?
1682 * this almost certainly polls too fast.
1683 */
1684 limit = max (limit, periodic_bytes (dum, ep));
1685 /* FALLTHROUGH */
1686
1687 // case PIPE_BULK: case PIPE_CONTROL:
1688 default:
1689 treat_control_like_bulk:
1690 ep->last_io = jiffies;
1691 total = transfer(dum, urb, ep, limit, &status);
1692 break;
1693 }
1694
1695 /* incomplete transfer? */
1696 if (status == -EINPROGRESS)
1697 continue;
1698
1699 return_urb:
1700 list_del (&urbp->urbp_list);
1701 kfree (urbp);
1702 if (ep)
1703 ep->already_seen = ep->setup_stage = 0;
1704
1705 usb_hcd_unlink_urb_from_ep(dummy_hcd_to_hcd(dum_hcd), urb);
1706 spin_unlock (&dum->lock);
1707 usb_hcd_giveback_urb(dummy_hcd_to_hcd(dum_hcd), urb, status);
1708 spin_lock (&dum->lock);
1709
1710 goto restart;
1711 }
1712
1713 if (list_empty(&dum_hcd->urbp_list)) {
1714 usb_put_dev(dum_hcd->udev);
1715 dum_hcd->udev = NULL;
1716 } else if (dum_hcd->rh_state == DUMMY_RH_RUNNING) {
1717 /* want a 1 msec delay here */
1718 mod_timer(&dum_hcd->timer, jiffies + msecs_to_jiffies(1));
1719 }
1720
1721 spin_unlock_irqrestore (&dum->lock, flags);
1722 }
1723
1724 /*-------------------------------------------------------------------------*/
1725
1726 #define PORT_C_MASK \
1727 ((USB_PORT_STAT_C_CONNECTION \
1728 | USB_PORT_STAT_C_ENABLE \
1729 | USB_PORT_STAT_C_SUSPEND \
1730 | USB_PORT_STAT_C_OVERCURRENT \
1731 | USB_PORT_STAT_C_RESET) << 16)
1732
1733 static int dummy_hub_status (struct usb_hcd *hcd, char *buf)
1734 {
1735 struct dummy_hcd *dum_hcd;
1736 unsigned long flags;
1737 int retval = 0;
1738
1739 dum_hcd = hcd_to_dummy_hcd(hcd);
1740
1741 spin_lock_irqsave(&dum_hcd->dum->lock, flags);
1742 if (!HCD_HW_ACCESSIBLE(hcd))
1743 goto done;
1744
1745 if (dum_hcd->resuming && time_after_eq(jiffies, dum_hcd->re_timeout)) {
1746 dum_hcd->port_status |= (USB_PORT_STAT_C_SUSPEND << 16);
1747 dum_hcd->port_status &= ~USB_PORT_STAT_SUSPEND;
1748 set_link_state(dum_hcd);
1749 }
1750
1751 if ((dum_hcd->port_status & PORT_C_MASK) != 0) {
1752 *buf = (1 << 1);
1753 dev_dbg(dummy_dev(dum_hcd), "port status 0x%08x has changes\n",
1754 dum_hcd->port_status);
1755 retval = 1;
1756 if (dum_hcd->rh_state == DUMMY_RH_SUSPENDED)
1757 usb_hcd_resume_root_hub (hcd);
1758 }
1759 done:
1760 spin_unlock_irqrestore(&dum_hcd->dum->lock, flags);
1761 return retval;
1762 }
1763
1764 static inline void
1765 ss_hub_descriptor(struct usb_hub_descriptor *desc)
1766 {
1767 memset(desc, 0, sizeof *desc);
1768 desc->bDescriptorType = 0x2a;
1769 desc->bDescLength = 12;
1770 desc->wHubCharacteristics = cpu_to_le16(0x0001);
1771 desc->bNbrPorts = 1;
1772 desc->u.ss.bHubHdrDecLat = 0x04; /* Worst case: 0.4 micro sec*/
1773 desc->u.ss.DeviceRemovable = 0xffff;
1774 }
1775
1776 static inline void
1777 hub_descriptor (struct usb_hub_descriptor *desc)
1778 {
1779 memset (desc, 0, sizeof *desc);
1780 desc->bDescriptorType = 0x29;
1781 desc->bDescLength = 9;
1782 desc->wHubCharacteristics = cpu_to_le16(0x0001);
1783 desc->bNbrPorts = 1;
1784 desc->u.hs.DeviceRemovable[0] = 0xff;
1785 desc->u.hs.DeviceRemovable[1] = 0xff;
1786 }
1787
1788 static int dummy_hub_control (
1789 struct usb_hcd *hcd,
1790 u16 typeReq,
1791 u16 wValue,
1792 u16 wIndex,
1793 char *buf,
1794 u16 wLength
1795 ) {
1796 struct dummy_hcd *dum_hcd;
1797 int retval = 0;
1798 unsigned long flags;
1799
1800 if (!HCD_HW_ACCESSIBLE(hcd))
1801 return -ETIMEDOUT;
1802
1803 dum_hcd = hcd_to_dummy_hcd(hcd);
1804
1805 spin_lock_irqsave(&dum_hcd->dum->lock, flags);
1806 switch (typeReq) {
1807 case ClearHubFeature:
1808 break;
1809 case ClearPortFeature:
1810 switch (wValue) {
1811 case USB_PORT_FEAT_SUSPEND:
1812 if (hcd->speed == HCD_USB3) {
1813 dev_dbg(dummy_dev(dum_hcd),
1814 "USB_PORT_FEAT_SUSPEND req not "
1815 "supported for USB 3.0 roothub\n");
1816 goto error;
1817 }
1818 if (dum_hcd->port_status & USB_PORT_STAT_SUSPEND) {
1819 /* 20msec resume signaling */
1820 dum_hcd->resuming = 1;
1821 dum_hcd->re_timeout = jiffies +
1822 msecs_to_jiffies(20);
1823 }
1824 break;
1825 case USB_PORT_FEAT_POWER:
1826 if (hcd->speed == HCD_USB3) {
1827 if (dum_hcd->port_status & USB_PORT_STAT_POWER)
1828 dev_dbg(dummy_dev(dum_hcd),
1829 "power-off\n");
1830 } else
1831 if (dum_hcd->port_status &
1832 USB_SS_PORT_STAT_POWER)
1833 dev_dbg(dummy_dev(dum_hcd),
1834 "power-off\n");
1835 /* FALLS THROUGH */
1836 default:
1837 dum_hcd->port_status &= ~(1 << wValue);
1838 set_link_state(dum_hcd);
1839 }
1840 break;
1841 case GetHubDescriptor:
1842 if (hcd->speed == HCD_USB3 &&
1843 (wLength < USB_DT_SS_HUB_SIZE ||
1844 wValue != (USB_DT_SS_HUB << 8))) {
1845 dev_dbg(dummy_dev(dum_hcd),
1846 "Wrong hub descriptor type for "
1847 "USB 3.0 roothub.\n");
1848 goto error;
1849 }
1850 if (hcd->speed == HCD_USB3)
1851 ss_hub_descriptor((struct usb_hub_descriptor *) buf);
1852 else
1853 hub_descriptor((struct usb_hub_descriptor *) buf);
1854 break;
1855 case GetHubStatus:
1856 *(__le32 *) buf = cpu_to_le32 (0);
1857 break;
1858 case GetPortStatus:
1859 if (wIndex != 1)
1860 retval = -EPIPE;
1861
1862 /* whoever resets or resumes must GetPortStatus to
1863 * complete it!!
1864 */
1865 if (dum_hcd->resuming &&
1866 time_after_eq(jiffies, dum_hcd->re_timeout)) {
1867 dum_hcd->port_status |= (USB_PORT_STAT_C_SUSPEND << 16);
1868 dum_hcd->port_status &= ~USB_PORT_STAT_SUSPEND;
1869 }
1870 if ((dum_hcd->port_status & USB_PORT_STAT_RESET) != 0 &&
1871 time_after_eq(jiffies, dum_hcd->re_timeout)) {
1872 dum_hcd->port_status |= (USB_PORT_STAT_C_RESET << 16);
1873 dum_hcd->port_status &= ~USB_PORT_STAT_RESET;
1874 if (dum_hcd->dum->pullup) {
1875 dum_hcd->port_status |= USB_PORT_STAT_ENABLE;
1876
1877 if (hcd->speed < HCD_USB3) {
1878 switch (dum_hcd->dum->gadget.speed) {
1879 case USB_SPEED_HIGH:
1880 dum_hcd->port_status |=
1881 USB_PORT_STAT_HIGH_SPEED;
1882 break;
1883 case USB_SPEED_LOW:
1884 dum_hcd->dum->gadget.ep0->
1885 maxpacket = 8;
1886 dum_hcd->port_status |=
1887 USB_PORT_STAT_LOW_SPEED;
1888 break;
1889 default:
1890 dum_hcd->dum->gadget.speed =
1891 USB_SPEED_FULL;
1892 break;
1893 }
1894 }
1895 }
1896 }
1897 set_link_state(dum_hcd);
1898 ((__le16 *) buf)[0] = cpu_to_le16 (dum_hcd->port_status);
1899 ((__le16 *) buf)[1] = cpu_to_le16 (dum_hcd->port_status >> 16);
1900 break;
1901 case SetHubFeature:
1902 retval = -EPIPE;
1903 break;
1904 case SetPortFeature:
1905 switch (wValue) {
1906 case USB_PORT_FEAT_LINK_STATE:
1907 if (hcd->speed != HCD_USB3) {
1908 dev_dbg(dummy_dev(dum_hcd),
1909 "USB_PORT_FEAT_LINK_STATE req not "
1910 "supported for USB 2.0 roothub\n");
1911 goto error;
1912 }
1913 /*
1914 * Since this is dummy we don't have an actual link so
1915 * there is nothing to do for the SET_LINK_STATE cmd
1916 */
1917 break;
1918 case USB_PORT_FEAT_U1_TIMEOUT:
1919 case USB_PORT_FEAT_U2_TIMEOUT:
1920 /* TODO: add suspend/resume support! */
1921 if (hcd->speed != HCD_USB3) {
1922 dev_dbg(dummy_dev(dum_hcd),
1923 "USB_PORT_FEAT_U1/2_TIMEOUT req not "
1924 "supported for USB 2.0 roothub\n");
1925 goto error;
1926 }
1927 break;
1928 case USB_PORT_FEAT_SUSPEND:
1929 /* Applicable only for USB2.0 hub */
1930 if (hcd->speed == HCD_USB3) {
1931 dev_dbg(dummy_dev(dum_hcd),
1932 "USB_PORT_FEAT_SUSPEND req not "
1933 "supported for USB 3.0 roothub\n");
1934 goto error;
1935 }
1936 if (dum_hcd->active) {
1937 dum_hcd->port_status |= USB_PORT_STAT_SUSPEND;
1938
1939 /* HNP would happen here; for now we
1940 * assume b_bus_req is always true.
1941 */
1942 set_link_state(dum_hcd);
1943 if (((1 << USB_DEVICE_B_HNP_ENABLE)
1944 & dum_hcd->dum->devstatus) != 0)
1945 dev_dbg(dummy_dev(dum_hcd),
1946 "no HNP yet!\n");
1947 }
1948 break;
1949 case USB_PORT_FEAT_POWER:
1950 if (hcd->speed == HCD_USB3)
1951 dum_hcd->port_status |= USB_SS_PORT_STAT_POWER;
1952 else
1953 dum_hcd->port_status |= USB_PORT_STAT_POWER;
1954 set_link_state(dum_hcd);
1955 break;
1956 case USB_PORT_FEAT_BH_PORT_RESET:
1957 /* Applicable only for USB3.0 hub */
1958 if (hcd->speed != HCD_USB3) {
1959 dev_dbg(dummy_dev(dum_hcd),
1960 "USB_PORT_FEAT_BH_PORT_RESET req not "
1961 "supported for USB 2.0 roothub\n");
1962 goto error;
1963 }
1964 /* FALLS THROUGH */
1965 case USB_PORT_FEAT_RESET:
1966 /* if it's already enabled, disable */
1967 if (hcd->speed == HCD_USB3) {
1968 dum_hcd->port_status = 0;
1969 dum_hcd->port_status =
1970 (USB_SS_PORT_STAT_POWER |
1971 USB_PORT_STAT_CONNECTION |
1972 USB_PORT_STAT_RESET);
1973 } else
1974 dum_hcd->port_status &= ~(USB_PORT_STAT_ENABLE
1975 | USB_PORT_STAT_LOW_SPEED
1976 | USB_PORT_STAT_HIGH_SPEED);
1977 /*
1978 * We want to reset device status. All but the
1979 * Self powered feature
1980 */
1981 dum_hcd->dum->devstatus &=
1982 (1 << USB_DEVICE_SELF_POWERED);
1983 /*
1984 * FIXME USB3.0: what is the correct reset signaling
1985 * interval? Is it still 50msec as for HS?
1986 */
1987 dum_hcd->re_timeout = jiffies + msecs_to_jiffies(50);
1988 /* FALLS THROUGH */
1989 default:
1990 if (hcd->speed == HCD_USB3) {
1991 if ((dum_hcd->port_status &
1992 USB_SS_PORT_STAT_POWER) != 0) {
1993 dum_hcd->port_status |= (1 << wValue);
1994 set_link_state(dum_hcd);
1995 }
1996 } else
1997 if ((dum_hcd->port_status &
1998 USB_PORT_STAT_POWER) != 0) {
1999 dum_hcd->port_status |= (1 << wValue);
2000 set_link_state(dum_hcd);
2001 }
2002 }
2003 break;
2004 case GetPortErrorCount:
2005 if (hcd->speed != HCD_USB3) {
2006 dev_dbg(dummy_dev(dum_hcd),
2007 "GetPortErrorCount req not "
2008 "supported for USB 2.0 roothub\n");
2009 goto error;
2010 }
2011 /* We'll always return 0 since this is a dummy hub */
2012 *(__le32 *) buf = cpu_to_le32(0);
2013 break;
2014 case SetHubDepth:
2015 if (hcd->speed != HCD_USB3) {
2016 dev_dbg(dummy_dev(dum_hcd),
2017 "SetHubDepth req not supported for "
2018 "USB 2.0 roothub\n");
2019 goto error;
2020 }
2021 break;
2022 default:
2023 dev_dbg(dummy_dev(dum_hcd),
2024 "hub control req%04x v%04x i%04x l%d\n",
2025 typeReq, wValue, wIndex, wLength);
2026 error:
2027 /* "protocol stall" on error */
2028 retval = -EPIPE;
2029 }
2030 spin_unlock_irqrestore(&dum_hcd->dum->lock, flags);
2031
2032 if ((dum_hcd->port_status & PORT_C_MASK) != 0)
2033 usb_hcd_poll_rh_status (hcd);
2034 return retval;
2035 }
2036
2037 static int dummy_bus_suspend (struct usb_hcd *hcd)
2038 {
2039 struct dummy_hcd *dum_hcd = hcd_to_dummy_hcd(hcd);
2040
2041 dev_dbg (&hcd->self.root_hub->dev, "%s\n", __func__);
2042
2043 spin_lock_irq(&dum_hcd->dum->lock);
2044 dum_hcd->rh_state = DUMMY_RH_SUSPENDED;
2045 set_link_state(dum_hcd);
2046 hcd->state = HC_STATE_SUSPENDED;
2047 spin_unlock_irq(&dum_hcd->dum->lock);
2048 return 0;
2049 }
2050
2051 static int dummy_bus_resume (struct usb_hcd *hcd)
2052 {
2053 struct dummy_hcd *dum_hcd = hcd_to_dummy_hcd(hcd);
2054 int rc = 0;
2055
2056 dev_dbg (&hcd->self.root_hub->dev, "%s\n", __func__);
2057
2058 spin_lock_irq(&dum_hcd->dum->lock);
2059 if (!HCD_HW_ACCESSIBLE(hcd)) {
2060 rc = -ESHUTDOWN;
2061 } else {
2062 dum_hcd->rh_state = DUMMY_RH_RUNNING;
2063 set_link_state(dum_hcd);
2064 if (!list_empty(&dum_hcd->urbp_list))
2065 mod_timer(&dum_hcd->timer, jiffies);
2066 hcd->state = HC_STATE_RUNNING;
2067 }
2068 spin_unlock_irq(&dum_hcd->dum->lock);
2069 return rc;
2070 }
2071
2072 /*-------------------------------------------------------------------------*/
2073
2074 static inline ssize_t
2075 show_urb (char *buf, size_t size, struct urb *urb)
2076 {
2077 int ep = usb_pipeendpoint (urb->pipe);
2078
2079 return snprintf (buf, size,
2080 "urb/%p %s ep%d%s%s len %d/%d\n",
2081 urb,
2082 ({ char *s;
2083 switch (urb->dev->speed) {
2084 case USB_SPEED_LOW:
2085 s = "ls";
2086 break;
2087 case USB_SPEED_FULL:
2088 s = "fs";
2089 break;
2090 case USB_SPEED_HIGH:
2091 s = "hs";
2092 break;
2093 case USB_SPEED_SUPER:
2094 s = "ss";
2095 break;
2096 default:
2097 s = "?";
2098 break;
2099 }; s; }),
2100 ep, ep ? (usb_pipein (urb->pipe) ? "in" : "out") : "",
2101 ({ char *s; \
2102 switch (usb_pipetype (urb->pipe)) { \
2103 case PIPE_CONTROL: \
2104 s = ""; \
2105 break; \
2106 case PIPE_BULK: \
2107 s = "-bulk"; \
2108 break; \
2109 case PIPE_INTERRUPT: \
2110 s = "-int"; \
2111 break; \
2112 default: \
2113 s = "-iso"; \
2114 break; \
2115 }; s;}),
2116 urb->actual_length, urb->transfer_buffer_length);
2117 }
2118
2119 static ssize_t
2120 show_urbs (struct device *dev, struct device_attribute *attr, char *buf)
2121 {
2122 struct usb_hcd *hcd = dev_get_drvdata (dev);
2123 struct dummy_hcd *dum_hcd = hcd_to_dummy_hcd(hcd);
2124 struct urbp *urbp;
2125 size_t size = 0;
2126 unsigned long flags;
2127
2128 spin_lock_irqsave(&dum_hcd->dum->lock, flags);
2129 list_for_each_entry(urbp, &dum_hcd->urbp_list, urbp_list) {
2130 size_t temp;
2131
2132 temp = show_urb (buf, PAGE_SIZE - size, urbp->urb);
2133 buf += temp;
2134 size += temp;
2135 }
2136 spin_unlock_irqrestore(&dum_hcd->dum->lock, flags);
2137
2138 return size;
2139 }
2140 static DEVICE_ATTR (urbs, S_IRUGO, show_urbs, NULL);
2141
2142 static int dummy_start_ss(struct dummy_hcd *dum_hcd)
2143 {
2144 init_timer(&dum_hcd->timer);
2145 dum_hcd->timer.function = dummy_timer;
2146 dum_hcd->timer.data = (unsigned long)dum_hcd;
2147 dum_hcd->rh_state = DUMMY_RH_RUNNING;
2148 INIT_LIST_HEAD(&dum_hcd->urbp_list);
2149 dummy_hcd_to_hcd(dum_hcd)->power_budget = POWER_BUDGET;
2150 dummy_hcd_to_hcd(dum_hcd)->state = HC_STATE_RUNNING;
2151 dummy_hcd_to_hcd(dum_hcd)->uses_new_polling = 1;
2152 #ifdef CONFIG_USB_OTG
2153 dummy_hcd_to_hcd(dum_hcd)->self.otg_port = 1;
2154 #endif
2155 return 0;
2156
2157 /* FIXME 'urbs' should be a per-device thing, maybe in usbcore */
2158 return device_create_file(dummy_dev(dum_hcd), &dev_attr_urbs);
2159 }
2160
2161 static int dummy_start(struct usb_hcd *hcd)
2162 {
2163 struct dummy_hcd *dum_hcd = hcd_to_dummy_hcd(hcd);
2164
2165 /*
2166 * MASTER side init ... we emulate a root hub that'll only ever
2167 * talk to one device (the slave side). Also appears in sysfs,
2168 * just like more familiar pci-based HCDs.
2169 */
2170 if (!usb_hcd_is_primary_hcd(hcd))
2171 return dummy_start_ss(dum_hcd);
2172
2173 spin_lock_init(&dum_hcd->dum->lock);
2174 init_timer(&dum_hcd->timer);
2175 dum_hcd->timer.function = dummy_timer;
2176 dum_hcd->timer.data = (unsigned long)dum_hcd;
2177 dum_hcd->rh_state = DUMMY_RH_RUNNING;
2178
2179 INIT_LIST_HEAD(&dum_hcd->urbp_list);
2180
2181 hcd->power_budget = POWER_BUDGET;
2182 hcd->state = HC_STATE_RUNNING;
2183 hcd->uses_new_polling = 1;
2184
2185 #ifdef CONFIG_USB_OTG
2186 hcd->self.otg_port = 1;
2187 #endif
2188
2189 /* FIXME 'urbs' should be a per-device thing, maybe in usbcore */
2190 return device_create_file(dummy_dev(dum_hcd), &dev_attr_urbs);
2191 }
2192
2193 static void dummy_stop (struct usb_hcd *hcd)
2194 {
2195 struct dummy *dum;
2196
2197 dum = (hcd_to_dummy_hcd(hcd))->dum;
2198 device_remove_file(dummy_dev(hcd_to_dummy_hcd(hcd)), &dev_attr_urbs);
2199 usb_gadget_unregister_driver(dum->driver);
2200 dev_info(dummy_dev(hcd_to_dummy_hcd(hcd)), "stopped\n");
2201 }
2202
2203 /*-------------------------------------------------------------------------*/
2204
2205 static int dummy_h_get_frame (struct usb_hcd *hcd)
2206 {
2207 return dummy_g_get_frame (NULL);
2208 }
2209
2210 static int dummy_setup(struct usb_hcd *hcd)
2211 {
2212 if (usb_hcd_is_primary_hcd(hcd)) {
2213 the_controller.hs_hcd = hcd_to_dummy_hcd(hcd);
2214 the_controller.hs_hcd->dum = &the_controller;
2215 /*
2216 * Mark the first roothub as being USB 2.0.
2217 * The USB 3.0 roothub will be registered later by
2218 * dummy_hcd_probe()
2219 */
2220 hcd->speed = HCD_USB2;
2221 hcd->self.root_hub->speed = USB_SPEED_HIGH;
2222 } else {
2223 the_controller.ss_hcd = hcd_to_dummy_hcd(hcd);
2224 the_controller.ss_hcd->dum = &the_controller;
2225 hcd->speed = HCD_USB3;
2226 hcd->self.root_hub->speed = USB_SPEED_SUPER;
2227 }
2228 return 0;
2229 }
2230
2231 /* Change a group of bulk endpoints to support multiple stream IDs */
2232 int dummy_alloc_streams(struct usb_hcd *hcd, struct usb_device *udev,
2233 struct usb_host_endpoint **eps, unsigned int num_eps,
2234 unsigned int num_streams, gfp_t mem_flags)
2235 {
2236 if (hcd->speed != HCD_USB3)
2237 dev_dbg(dummy_dev(hcd_to_dummy_hcd(hcd)),
2238 "%s() - ERROR! Not supported for USB2.0 roothub\n",
2239 __func__);
2240 return 0;
2241 }
2242
2243 /* Reverts a group of bulk endpoints back to not using stream IDs. */
2244 int dummy_free_streams(struct usb_hcd *hcd, struct usb_device *udev,
2245 struct usb_host_endpoint **eps, unsigned int num_eps,
2246 gfp_t mem_flags)
2247 {
2248 if (hcd->speed != HCD_USB3)
2249 dev_dbg(dummy_dev(hcd_to_dummy_hcd(hcd)),
2250 "%s() - ERROR! Not supported for USB2.0 roothub\n",
2251 __func__);
2252 return 0;
2253 }
2254
2255 static struct hc_driver dummy_hcd = {
2256 .description = (char *) driver_name,
2257 .product_desc = "Dummy host controller",
2258 .hcd_priv_size = sizeof(struct dummy_hcd),
2259
2260 .flags = HCD_USB3 | HCD_SHARED,
2261
2262 .reset = dummy_setup,
2263 .start = dummy_start,
2264 .stop = dummy_stop,
2265
2266 .urb_enqueue = dummy_urb_enqueue,
2267 .urb_dequeue = dummy_urb_dequeue,
2268
2269 .get_frame_number = dummy_h_get_frame,
2270
2271 .hub_status_data = dummy_hub_status,
2272 .hub_control = dummy_hub_control,
2273 .bus_suspend = dummy_bus_suspend,
2274 .bus_resume = dummy_bus_resume,
2275
2276 .alloc_streams = dummy_alloc_streams,
2277 .free_streams = dummy_free_streams,
2278 };
2279
2280 static int dummy_hcd_probe(struct platform_device *pdev)
2281 {
2282 struct usb_hcd *hs_hcd;
2283 struct usb_hcd *ss_hcd;
2284 int retval;
2285
2286 dev_info(&pdev->dev, "%s, driver " DRIVER_VERSION "\n", driver_desc);
2287
2288 if (!mod_data.is_super_speed)
2289 dummy_hcd.flags = HCD_USB2;
2290 hs_hcd = usb_create_hcd(&dummy_hcd, &pdev->dev, dev_name(&pdev->dev));
2291 if (!hs_hcd)
2292 return -ENOMEM;
2293 hs_hcd->has_tt = 1;
2294
2295 retval = usb_add_hcd(hs_hcd, 0, 0);
2296 if (retval != 0) {
2297 usb_put_hcd(hs_hcd);
2298 return retval;
2299 }
2300
2301 if (mod_data.is_super_speed) {
2302 ss_hcd = usb_create_shared_hcd(&dummy_hcd, &pdev->dev,
2303 dev_name(&pdev->dev), hs_hcd);
2304 if (!ss_hcd) {
2305 retval = -ENOMEM;
2306 goto dealloc_usb2_hcd;
2307 }
2308
2309 retval = usb_add_hcd(ss_hcd, 0, 0);
2310 if (retval)
2311 goto put_usb3_hcd;
2312 }
2313 return 0;
2314
2315 put_usb3_hcd:
2316 usb_put_hcd(ss_hcd);
2317 dealloc_usb2_hcd:
2318 usb_put_hcd(hs_hcd);
2319 the_controller.hs_hcd = the_controller.ss_hcd = NULL;
2320 return retval;
2321 }
2322
2323 static int dummy_hcd_remove(struct platform_device *pdev)
2324 {
2325 struct dummy *dum;
2326
2327 dum = (hcd_to_dummy_hcd(platform_get_drvdata(pdev)))->dum;
2328
2329 if (dum->ss_hcd) {
2330 usb_remove_hcd(dummy_hcd_to_hcd(dum->ss_hcd));
2331 usb_put_hcd(dummy_hcd_to_hcd(dum->ss_hcd));
2332 }
2333
2334 usb_remove_hcd(dummy_hcd_to_hcd(dum->hs_hcd));
2335 usb_put_hcd(dummy_hcd_to_hcd(dum->hs_hcd));
2336
2337 the_controller.hs_hcd = NULL;
2338 the_controller.ss_hcd = NULL;
2339
2340 return 0;
2341 }
2342
2343 static int dummy_hcd_suspend (struct platform_device *pdev, pm_message_t state)
2344 {
2345 struct usb_hcd *hcd;
2346 struct dummy_hcd *dum_hcd;
2347 int rc = 0;
2348
2349 dev_dbg (&pdev->dev, "%s\n", __func__);
2350
2351 hcd = platform_get_drvdata (pdev);
2352 dum_hcd = hcd_to_dummy_hcd(hcd);
2353 if (dum_hcd->rh_state == DUMMY_RH_RUNNING) {
2354 dev_warn(&pdev->dev, "Root hub isn't suspended!\n");
2355 rc = -EBUSY;
2356 } else
2357 clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
2358 return rc;
2359 }
2360
2361 static int dummy_hcd_resume (struct platform_device *pdev)
2362 {
2363 struct usb_hcd *hcd;
2364
2365 dev_dbg (&pdev->dev, "%s\n", __func__);
2366
2367 hcd = platform_get_drvdata (pdev);
2368 set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
2369 usb_hcd_poll_rh_status (hcd);
2370 return 0;
2371 }
2372
2373 static struct platform_driver dummy_hcd_driver = {
2374 .probe = dummy_hcd_probe,
2375 .remove = dummy_hcd_remove,
2376 .suspend = dummy_hcd_suspend,
2377 .resume = dummy_hcd_resume,
2378 .driver = {
2379 .name = (char *) driver_name,
2380 .owner = THIS_MODULE,
2381 },
2382 };
2383
2384 /*-------------------------------------------------------------------------*/
2385
2386 static struct platform_device *the_udc_pdev;
2387 static struct platform_device *the_hcd_pdev;
2388
2389 static int __init init (void)
2390 {
2391 int retval = -ENOMEM;
2392
2393 if (usb_disabled ())
2394 return -ENODEV;
2395
2396 if (!mod_data.is_high_speed && mod_data.is_super_speed)
2397 return -EINVAL;
2398
2399 the_hcd_pdev = platform_device_alloc(driver_name, -1);
2400 if (!the_hcd_pdev)
2401 return retval;
2402 the_udc_pdev = platform_device_alloc(gadget_name, -1);
2403 if (!the_udc_pdev)
2404 goto err_alloc_udc;
2405
2406 retval = platform_driver_register(&dummy_hcd_driver);
2407 if (retval < 0)
2408 goto err_register_hcd_driver;
2409 retval = platform_driver_register(&dummy_udc_driver);
2410 if (retval < 0)
2411 goto err_register_udc_driver;
2412
2413 retval = platform_device_add(the_hcd_pdev);
2414 if (retval < 0)
2415 goto err_add_hcd;
2416 if (!the_controller.hs_hcd ||
2417 (!the_controller.ss_hcd && mod_data.is_super_speed)) {
2418 /*
2419 * The hcd was added successfully but its probe function failed
2420 * for some reason.
2421 */
2422 retval = -EINVAL;
2423 goto err_add_udc;
2424 }
2425 retval = platform_device_add(the_udc_pdev);
2426 if (retval < 0)
2427 goto err_add_udc;
2428 if (!platform_get_drvdata(the_udc_pdev)) {
2429 /*
2430 * The udc was added successfully but its probe function failed
2431 * for some reason.
2432 */
2433 retval = -EINVAL;
2434 goto err_probe_udc;
2435 }
2436 return retval;
2437
2438 err_probe_udc:
2439 platform_device_del(the_udc_pdev);
2440 err_add_udc:
2441 platform_device_del(the_hcd_pdev);
2442 err_add_hcd:
2443 platform_driver_unregister(&dummy_udc_driver);
2444 err_register_udc_driver:
2445 platform_driver_unregister(&dummy_hcd_driver);
2446 err_register_hcd_driver:
2447 platform_device_put(the_udc_pdev);
2448 err_alloc_udc:
2449 platform_device_put(the_hcd_pdev);
2450 return retval;
2451 }
2452 module_init (init);
2453
2454 static void __exit cleanup (void)
2455 {
2456 platform_device_unregister(the_udc_pdev);
2457 platform_device_unregister(the_hcd_pdev);
2458 platform_driver_unregister(&dummy_udc_driver);
2459 platform_driver_unregister(&dummy_hcd_driver);
2460 }
2461 module_exit (cleanup);
Linux with added FPC-III support