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USB: gadget: section mismatch warning fixed
[linux-2.6-block.git] / drivers / usb / gadget / dummy_hcd.c
CommitLineData
1da177e4
LT		 1/*
2 * dummy_hcd.c -- Dummy/Loopback USB host and device emulator driver.
3 *
4 * Maintainer: Alan Stern <stern@rowland.harvard.edu>
5 *
6 * Copyright (C) 2003 David Brownell
7 * Copyright (C) 2003-2005 Alan Stern
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22 */
23
24
25/*
26 * This exposes a device side "USB gadget" API, driven by requests to a
27 * Linux-USB host controller driver. USB traffic is simulated; there's
28 * no need for USB hardware. Use this with two other drivers:
29 *
30 * - Gadget driver, responding to requests (slave);
31 * - Host-side device driver, as already familiar in Linux.
32 *
33 * Having this all in one kernel can help some stages of development,
34 * bypassing some hardware (and driver) issues. UML could help too.
35 */
36
1da177e4
LT		 37#include <linux/module.h>
38#include <linux/kernel.h>
39#include <linux/delay.h>
40#include <linux/ioport.h>
1da177e4 41#include <linux/slab.h>
1da177e4
LT		 42#include <linux/errno.h>
43#include <linux/init.h>
44#include <linux/timer.h>
45#include <linux/list.h>
46#include <linux/interrupt.h>
d052d1be 47#include <linux/platform_device.h>
1da177e4 48#include <linux/usb.h>
9454a57a 49#include <linux/usb/gadget.h>
27729aad 50#include <linux/usb/hcd.h>
1da177e4
LT		 51
52#include <asm/byteorder.h>
53#include <asm/io.h>
54#include <asm/irq.h>
55#include <asm/system.h>
56#include <asm/unaligned.h>
57
58
1da177e4 59#define DRIVER_DESC "USB Host+Gadget Emulator"
391eca9d 60#define DRIVER_VERSION "02 May 2005"
1da177e4 61
caf29f62
AS		 62#define POWER_BUDGET 500 /* in mA; use 8 for low-power port testing */
63
1da177e4
LT		 64static const char driver_name [] = "dummy_hcd";
65static const char driver_desc [] = "USB Host+Gadget Emulator";
66
67static const char gadget_name [] = "dummy_udc";
68
69MODULE_DESCRIPTION (DRIVER_DESC);
70MODULE_AUTHOR ("David Brownell");
71MODULE_LICENSE ("GPL");
72
73/*-------------------------------------------------------------------------*/
74
75/* gadget side driver data structres */
76struct dummy_ep {
77 struct list_head queue;
78 unsigned long last_io; /* jiffies timestamp */
79 struct usb_gadget *gadget;
80 const struct usb_endpoint_descriptor *desc;
81 struct usb_ep ep;
82 unsigned halted : 1;
851a526d 83 unsigned wedged : 1;
1da177e4
LT		 84 unsigned already_seen : 1;
85 unsigned setup_stage : 1;
86};
87
88struct dummy_request {
89 struct list_head queue; /* ep's requests */
90 struct usb_request req;
91};
92
93static inline struct dummy_ep *usb_ep_to_dummy_ep (struct usb_ep *_ep)
94{
95 return container_of (_ep, struct dummy_ep, ep);
96}
97
98static inline struct dummy_request *usb_request_to_dummy_request
99 (struct usb_request *_req)
100{
101 return container_of (_req, struct dummy_request, req);
102}
103
104/*-------------------------------------------------------------------------*/
105
106/*
107 * Every device has ep0 for control requests, plus up to 30 more endpoints,
108 * in one of two types:
109 *
110 * - Configurable: direction (in/out), type (bulk, iso, etc), and endpoint
111 * number can be changed. Names like "ep-a" are used for this type.
112 *
113 * - Fixed Function: in other cases. some characteristics may be mutable;
114 * that'd be hardware-specific. Names like "ep12out-bulk" are used.
115 *
116 * Gadget drivers are responsible for not setting up conflicting endpoint
117 * configurations, illegal or unsupported packet lengths, and so on.
118 */
119
120static const char ep0name [] = "ep0";
121
122static const char *const ep_name [] = {
123 ep0name, /* everyone has ep0 */
124
125 /* act like a net2280: high speed, six configurable endpoints */
126 "ep-a", "ep-b", "ep-c", "ep-d", "ep-e", "ep-f",
127
128 /* or like pxa250: fifteen fixed function endpoints */
129 "ep1in-bulk", "ep2out-bulk", "ep3in-iso", "ep4out-iso", "ep5in-int",
130 "ep6in-bulk", "ep7out-bulk", "ep8in-iso", "ep9out-iso", "ep10in-int",
131 "ep11in-bulk", "ep12out-bulk", "ep13in-iso", "ep14out-iso",
132 "ep15in-int",
133
134 /* or like sa1100: two fixed function endpoints */
135 "ep1out-bulk", "ep2in-bulk",
136};
52950ed4 137#define DUMMY_ENDPOINTS ARRAY_SIZE(ep_name)
1da177e4 138
d9b76251
AS		 139/*-------------------------------------------------------------------------*/
140
1da177e4
LT		 141#define FIFO_SIZE 64
142
143struct urbp {
144 struct urb *urb;
145 struct list_head urbp_list;
146};
147
391eca9d
AS		 148
149enum dummy_rh_state {
150 DUMMY_RH_RESET,
151 DUMMY_RH_SUSPENDED,
152 DUMMY_RH_RUNNING
153};
154
1da177e4
LT		 155struct dummy {
156 spinlock_t lock;
157
158 /*
159 * SLAVE/GADGET side support
160 */
161 struct dummy_ep ep [DUMMY_ENDPOINTS];
162 int address;
163 struct usb_gadget gadget;
164 struct usb_gadget_driver *driver;
165 struct dummy_request fifo_req;
166 u8 fifo_buf [FIFO_SIZE];
167 u16 devstatus;
391eca9d 168 unsigned udc_suspended:1;
f1c39fad
AS		 169 unsigned pullup:1;
170 unsigned active:1;
171 unsigned old_active:1;
1da177e4
LT		 172
173 /*
174 * MASTER/HOST side support
175 */
391eca9d 176 enum dummy_rh_state rh_state;
1da177e4
LT		 177 struct timer_list timer;
178 u32 port_status;
f1c39fad 179 u32 old_status;
1da177e4
LT		 180 unsigned resuming:1;
181 unsigned long re_timeout;
182
183 struct usb_device *udev;
184 struct list_head urbp_list;
185};
186
187static inline struct dummy *hcd_to_dummy (struct usb_hcd *hcd)
188{
189 return (struct dummy *) (hcd->hcd_priv);
190}
191
192static inline struct usb_hcd *dummy_to_hcd (struct dummy *dum)
193{
194 return container_of((void *) dum, struct usb_hcd, hcd_priv);
195}
196
197static inline struct device *dummy_dev (struct dummy *dum)
198{
199 return dummy_to_hcd(dum)->self.controller;
200}
201
d9b76251
AS		 202static inline struct device *udc_dev (struct dummy *dum)
203{
204 return dum->gadget.dev.parent;
205}
206
1da177e4
LT		 207static inline struct dummy *ep_to_dummy (struct dummy_ep *ep)
208{
209 return container_of (ep->gadget, struct dummy, gadget);
210}
211
212static inline struct dummy *gadget_to_dummy (struct usb_gadget *gadget)
213{
214 return container_of (gadget, struct dummy, gadget);
215}
216
217static inline struct dummy *gadget_dev_to_dummy (struct device *dev)
218{
219 return container_of (dev, struct dummy, gadget.dev);
220}
221
222static struct dummy *the_controller;
223
224/*-------------------------------------------------------------------------*/
225
f1c39fad
AS		 226/* SLAVE/GADGET SIDE UTILITY ROUTINES */
227
228/* called with spinlock held */
229static void nuke (struct dummy *dum, struct dummy_ep *ep)
230{
231 while (!list_empty (&ep->queue)) {
232 struct dummy_request *req;
233
234 req = list_entry (ep->queue.next, struct dummy_request, queue);
235 list_del_init (&req->queue);
236 req->req.status = -ESHUTDOWN;
237
238 spin_unlock (&dum->lock);
239 req->req.complete (&ep->ep, &req->req);
240 spin_lock (&dum->lock);
241 }
242}
243
244/* caller must hold lock */
245static void
246stop_activity (struct dummy *dum)
247{
248 struct dummy_ep *ep;
249
250 /* prevent any more requests */
251 dum->address = 0;
252
253 /* The timer is left running so that outstanding URBs can fail */
254
255 /* nuke any pending requests first, so driver i/o is quiesced */
256 list_for_each_entry (ep, &dum->gadget.ep_list, ep.ep_list)
257 nuke (dum, ep);
258
259 /* driver now does any non-usb quiescing necessary */
260}
261
262/* caller must hold lock */
263static void
264set_link_state (struct dummy *dum)
265{
266 dum->active = 0;
267 if ((dum->port_status & USB_PORT_STAT_POWER) == 0)
268 dum->port_status = 0;
391eca9d
AS		 269
270 /* UDC suspend must cause a disconnect */
271 else if (!dum->pullup || dum->udc_suspended) {
f1c39fad
AS		 272 dum->port_status &= ~(USB_PORT_STAT_CONNECTION |
273 USB_PORT_STAT_ENABLE |
274 USB_PORT_STAT_LOW_SPEED |
275 USB_PORT_STAT_HIGH_SPEED |
276 USB_PORT_STAT_SUSPEND);
277 if ((dum->old_status & USB_PORT_STAT_CONNECTION) != 0)
278 dum->port_status |= (USB_PORT_STAT_C_CONNECTION << 16);
279 } else {
280 dum->port_status |= USB_PORT_STAT_CONNECTION;
281 if ((dum->old_status & USB_PORT_STAT_CONNECTION) == 0)
282 dum->port_status |= (USB_PORT_STAT_C_CONNECTION << 16);
283 if ((dum->port_status & USB_PORT_STAT_ENABLE) == 0)
284 dum->port_status &= ~USB_PORT_STAT_SUSPEND;
391eca9d
AS		 285 else if ((dum->port_status & USB_PORT_STAT_SUSPEND) == 0 &&
286 dum->rh_state != DUMMY_RH_SUSPENDED)
f1c39fad
AS		 287 dum->active = 1;
288 }
289
290 if ((dum->port_status & USB_PORT_STAT_ENABLE) == 0 || dum->active)
291 dum->resuming = 0;
292
293 if ((dum->port_status & USB_PORT_STAT_CONNECTION) == 0 ||
294 (dum->port_status & USB_PORT_STAT_RESET) != 0) {
295 if ((dum->old_status & USB_PORT_STAT_CONNECTION) != 0 &&
296 (dum->old_status & USB_PORT_STAT_RESET) == 0 &&
297 dum->driver) {
298 stop_activity (dum);
299 spin_unlock (&dum->lock);
300 dum->driver->disconnect (&dum->gadget);
301 spin_lock (&dum->lock);
302 }
303 } else if (dum->active != dum->old_active) {
304 if (dum->old_active && dum->driver->suspend) {
305 spin_unlock (&dum->lock);
306 dum->driver->suspend (&dum->gadget);
307 spin_lock (&dum->lock);
308 } else if (!dum->old_active && dum->driver->resume) {
309 spin_unlock (&dum->lock);
310 dum->driver->resume (&dum->gadget);
311 spin_lock (&dum->lock);
312 }
313 }
314
315 dum->old_status = dum->port_status;
316 dum->old_active = dum->active;
317}
318
319/*-------------------------------------------------------------------------*/
320
1da177e4
LT		 321/* SLAVE/GADGET SIDE DRIVER
322 *
323 * This only tracks gadget state. All the work is done when the host
324 * side tries some (emulated) i/o operation. Real device controller
325 * drivers would do real i/o using dma, fifos, irqs, timers, etc.
326 */
327
328#define is_enabled(dum) \
329 (dum->port_status & USB_PORT_STAT_ENABLE)
330
331static int
332dummy_enable (struct usb_ep *_ep, const struct usb_endpoint_descriptor *desc)
333{
334 struct dummy *dum;
335 struct dummy_ep *ep;
336 unsigned max;
337 int retval;
338
339 ep = usb_ep_to_dummy_ep (_ep);
340 if (!_ep || !desc || ep->desc || _ep->name == ep0name
341 || desc->bDescriptorType != USB_DT_ENDPOINT)
342 return -EINVAL;
343 dum = ep_to_dummy (ep);
344 if (!dum->driver || !is_enabled (dum))
345 return -ESHUTDOWN;
346 max = le16_to_cpu(desc->wMaxPacketSize) & 0x3ff;
347
348 /* drivers must not request bad settings, since lower levels
349 * (hardware or its drivers) may not check. some endpoints
350 * can't do iso, many have maxpacket limitations, etc.
351 *
352 * since this "hardware" driver is here to help debugging, we
353 * have some extra sanity checks. (there could be more though,
354 * especially for "ep9out" style fixed function ones.)
355 */
356 retval = -EINVAL;
357 switch (desc->bmAttributes & 0x03) {
358 case USB_ENDPOINT_XFER_BULK:
359 if (strstr (ep->ep.name, "-iso")
360 || strstr (ep->ep.name, "-int")) {
361 goto done;
362 }
363 switch (dum->gadget.speed) {
364 case USB_SPEED_HIGH:
365 if (max == 512)
366 break;
9063ff44
IL		 367 goto done;
368 case USB_SPEED_FULL:
369 if (max == 8 || max == 16 || max == 32 || max == 64)
1da177e4
LT		 370 /* we'll fake any legal size */
371 break;
9063ff44
IL		 372 /* save a return statement */
373 default:
374 goto done;
1da177e4
LT		 375 }
376 break;
377 case USB_ENDPOINT_XFER_INT:
378 if (strstr (ep->ep.name, "-iso")) /* bulk is ok */
379 goto done;
380 /* real hardware might not handle all packet sizes */
381 switch (dum->gadget.speed) {
382 case USB_SPEED_HIGH:
383 if (max <= 1024)
384 break;
385 /* save a return statement */
386 case USB_SPEED_FULL:
387 if (max <= 64)
388 break;
389 /* save a return statement */
390 default:
391 if (max <= 8)
392 break;
393 goto done;
394 }
395 break;
396 case USB_ENDPOINT_XFER_ISOC:
397 if (strstr (ep->ep.name, "-bulk")
398 || strstr (ep->ep.name, "-int"))
399 goto done;
400 /* real hardware might not handle all packet sizes */
401 switch (dum->gadget.speed) {
402 case USB_SPEED_HIGH:
403 if (max <= 1024)
404 break;
405 /* save a return statement */
406 case USB_SPEED_FULL:
407 if (max <= 1023)
408 break;
409 /* save a return statement */
410 default:
411 goto done;
412 }
413 break;
414 default:
415 /* few chips support control except on ep0 */
416 goto done;
417 }
418
419 _ep->maxpacket = max;
420 ep->desc = desc;
421
d9b76251 422 dev_dbg (udc_dev(dum), "enabled %s (ep%d%s-%s) maxpacket %d\n",
1da177e4
LT		 423 _ep->name,
424 desc->bEndpointAddress & 0x0f,
425 (desc->bEndpointAddress & USB_DIR_IN) ? "in" : "out",
426 ({ char *val;
427 switch (desc->bmAttributes & 0x03) {
428 case USB_ENDPOINT_XFER_BULK: val = "bulk"; break;
429 case USB_ENDPOINT_XFER_ISOC: val = "iso"; break;
430 case USB_ENDPOINT_XFER_INT: val = "intr"; break;
431 default: val = "ctrl"; break;
432 }; val; }),
433 max);
434
435 /* at this point real hardware should be NAKing transfers
436 * to that endpoint, until a buffer is queued to it.
437 */
851a526d 438 ep->halted = ep->wedged = 0;
1da177e4
LT		 439 retval = 0;
440done:
441 return retval;
442}
443
1da177e4
LT		 444static int dummy_disable (struct usb_ep *_ep)
445{
446 struct dummy_ep *ep;
447 struct dummy *dum;
448 unsigned long flags;
449 int retval;
450
451 ep = usb_ep_to_dummy_ep (_ep);
452 if (!_ep || !ep->desc || _ep->name == ep0name)
453 return -EINVAL;
454 dum = ep_to_dummy (ep);
455
456 spin_lock_irqsave (&dum->lock, flags);
457 ep->desc = NULL;
458 retval = 0;
459 nuke (dum, ep);
460 spin_unlock_irqrestore (&dum->lock, flags);
461
d9b76251 462 dev_dbg (udc_dev(dum), "disabled %s\n", _ep->name);
1da177e4
LT		 463 return retval;
464}
465
466static struct usb_request *
55016f10 467dummy_alloc_request (struct usb_ep *_ep, gfp_t mem_flags)
1da177e4
LT		 468{
469 struct dummy_ep *ep;
470 struct dummy_request *req;
471
472 if (!_ep)
473 return NULL;
474 ep = usb_ep_to_dummy_ep (_ep);
475
7039f422 476 req = kzalloc(sizeof(*req), mem_flags);
1da177e4
LT		 477 if (!req)
478 return NULL;
1da177e4
LT		 479 INIT_LIST_HEAD (&req->queue);
480 return &req->req;
481}
482
483static void
484dummy_free_request (struct usb_ep *_ep, struct usb_request *_req)
485{
486 struct dummy_ep *ep;
487 struct dummy_request *req;
488
489 ep = usb_ep_to_dummy_ep (_ep);
490 if (!ep || !_req || (!ep->desc && _ep->name != ep0name))
491 return;
492
493 req = usb_request_to_dummy_request (_req);
494 WARN_ON (!list_empty (&req->queue));
495 kfree (req);
496}
497
1da177e4
LT		 498static void
499fifo_complete (struct usb_ep *ep, struct usb_request *req)
500{
501}
502
503static int
5db539e4 504dummy_queue (struct usb_ep *_ep, struct usb_request *_req,
55016f10 505 gfp_t mem_flags)
1da177e4
LT		 506{
507 struct dummy_ep *ep;
508 struct dummy_request *req;
509 struct dummy *dum;
510 unsigned long flags;
511
512 req = usb_request_to_dummy_request (_req);
513 if (!_req || !list_empty (&req->queue) || !_req->complete)
514 return -EINVAL;
515
516 ep = usb_ep_to_dummy_ep (_ep);
517 if (!_ep || (!ep->desc && _ep->name != ep0name))
518 return -EINVAL;
519
520 dum = ep_to_dummy (ep);
521 if (!dum->driver || !is_enabled (dum))
522 return -ESHUTDOWN;
523
524#if 0
d9b76251 525 dev_dbg (udc_dev(dum), "ep %p queue req %p to %s, len %d buf %p\n",
1da177e4
LT		 526 ep, _req, _ep->name, _req->length, _req->buf);
527#endif
528
529 _req->status = -EINPROGRESS;
530 _req->actual = 0;
531 spin_lock_irqsave (&dum->lock, flags);
532
533 /* implement an emulated single-request FIFO */
534 if (ep->desc && (ep->desc->bEndpointAddress & USB_DIR_IN) &&
535 list_empty (&dum->fifo_req.queue) &&
536 list_empty (&ep->queue) &&
537 _req->length <= FIFO_SIZE) {
538 req = &dum->fifo_req;
539 req->req = *_req;
540 req->req.buf = dum->fifo_buf;
541 memcpy (dum->fifo_buf, _req->buf, _req->length);
542 req->req.context = dum;
543 req->req.complete = fifo_complete;
544
c728df70 545 list_add_tail(&req->queue, &ep->queue);
1da177e4
LT		 546 spin_unlock (&dum->lock);
547 _req->actual = _req->length;
548 _req->status = 0;
549 _req->complete (_ep, _req);
550 spin_lock (&dum->lock);
c728df70
DB		 551 } else
552 list_add_tail(&req->queue, &ep->queue);
1da177e4
LT		 553 spin_unlock_irqrestore (&dum->lock, flags);
554
555 /* real hardware would likely enable transfers here, in case
556 * it'd been left NAKing.
557 */
558 return 0;
559}
560
561static int dummy_dequeue (struct usb_ep *_ep, struct usb_request *_req)
562{
563 struct dummy_ep *ep;
564 struct dummy *dum;
565 int retval = -EINVAL;
566 unsigned long flags;
567 struct dummy_request *req = NULL;
568
569 if (!_ep || !_req)
570 return retval;
571 ep = usb_ep_to_dummy_ep (_ep);
572 dum = ep_to_dummy (ep);
573
574 if (!dum->driver)
575 return -ESHUTDOWN;
576
b4dbda1a
AS		 577 local_irq_save (flags);
578 spin_lock (&dum->lock);
1da177e4
LT		 579 list_for_each_entry (req, &ep->queue, queue) {
580 if (&req->req == _req) {
581 list_del_init (&req->queue);
582 _req->status = -ECONNRESET;
583 retval = 0;
584 break;
585 }
586 }
b4dbda1a 587 spin_unlock (&dum->lock);
1da177e4
LT		 588
589 if (retval == 0) {
d9b76251 590 dev_dbg (udc_dev(dum),
1da177e4
LT		 591 "dequeued req %p from %s, len %d buf %p\n",
592 req, _ep->name, _req->length, _req->buf);
593 _req->complete (_ep, _req);
594 }
b4dbda1a 595 local_irq_restore (flags);
1da177e4
LT		 596 return retval;
597}
598
599static int
851a526d 600dummy_set_halt_and_wedge(struct usb_ep *_ep, int value, int wedged)
1da177e4
LT		 601{
602 struct dummy_ep *ep;
603 struct dummy *dum;
604
605 if (!_ep)
606 return -EINVAL;
607 ep = usb_ep_to_dummy_ep (_ep);
608 dum = ep_to_dummy (ep);
609 if (!dum->driver)
610 return -ESHUTDOWN;
611 if (!value)
851a526d 612 ep->halted = ep->wedged = 0;
1da177e4
LT		 613 else if (ep->desc && (ep->desc->bEndpointAddress & USB_DIR_IN) &&
614 !list_empty (&ep->queue))
615 return -EAGAIN;
851a526d 616 else {
1da177e4 617 ep->halted = 1;
851a526d
AS		 618 if (wedged)
619 ep->wedged = 1;
620 }
1da177e4
LT		 621 /* FIXME clear emulated data toggle too */
622 return 0;
623}
624
851a526d
AS		 625static int
626dummy_set_halt(struct usb_ep *_ep, int value)
627{
628 return dummy_set_halt_and_wedge(_ep, value, 0);
629}
630
631static int dummy_set_wedge(struct usb_ep *_ep)
632{
633 if (!_ep || _ep->name == ep0name)
634 return -EINVAL;
635 return dummy_set_halt_and_wedge(_ep, 1, 1);
636}
637
1da177e4
LT		 638static const struct usb_ep_ops dummy_ep_ops = {
639 .enable = dummy_enable,
640 .disable = dummy_disable,
641
642 .alloc_request = dummy_alloc_request,
643 .free_request = dummy_free_request,
644
1da177e4
LT		 645 .queue = dummy_queue,
646 .dequeue = dummy_dequeue,
647
648 .set_halt = dummy_set_halt,
851a526d 649 .set_wedge = dummy_set_wedge,
1da177e4
LT		 650};
651
652/*-------------------------------------------------------------------------*/
653
654/* there are both host and device side versions of this call ... */
655static int dummy_g_get_frame (struct usb_gadget *_gadget)
656{
657 struct timeval tv;
658
659 do_gettimeofday (&tv);
660 return tv.tv_usec / 1000;
661}
662
663static int dummy_wakeup (struct usb_gadget *_gadget)
664{
665 struct dummy *dum;
666
667 dum = gadget_to_dummy (_gadget);
391eca9d 668 if (!(dum->devstatus & ( (1 << USB_DEVICE_B_HNP_ENABLE)
5742b0c9 669 | (1 << USB_DEVICE_REMOTE_WAKEUP))))
1da177e4 670 return -EINVAL;
391eca9d
AS		 671 if ((dum->port_status & USB_PORT_STAT_CONNECTION) == 0)
672 return -ENOLINK;
673 if ((dum->port_status & USB_PORT_STAT_SUSPEND) == 0 &&
674 dum->rh_state != DUMMY_RH_SUSPENDED)
675 return -EIO;
676
677 /* FIXME: What if the root hub is suspended but the port isn't? */
1da177e4
LT		 678
679 /* hub notices our request, issues downstream resume, etc */
680 dum->resuming = 1;
f1c39fad 681 dum->re_timeout = jiffies + msecs_to_jiffies(20);
685eb93f 682 mod_timer (&dummy_to_hcd (dum)->rh_timer, dum->re_timeout);
1da177e4
LT		 683 return 0;
684}
685
686static int dummy_set_selfpowered (struct usb_gadget *_gadget, int value)
687{
688 struct dummy *dum;
689
690 dum = gadget_to_dummy (_gadget);
691 if (value)
692 dum->devstatus |= (1 << USB_DEVICE_SELF_POWERED);
693 else
694 dum->devstatus &= ~(1 << USB_DEVICE_SELF_POWERED);
695 return 0;
696}
697
f1c39fad
AS		 698static int dummy_pullup (struct usb_gadget *_gadget, int value)
699{
700 struct dummy *dum;
701 unsigned long flags;
702
703 dum = gadget_to_dummy (_gadget);
704 spin_lock_irqsave (&dum->lock, flags);
705 dum->pullup = (value != 0);
706 set_link_state (dum);
707 spin_unlock_irqrestore (&dum->lock, flags);
685eb93f
AS		 708
709 usb_hcd_poll_rh_status (dummy_to_hcd (dum));
f1c39fad
AS		 710 return 0;
711}
712
1da177e4
LT		 713static const struct usb_gadget_ops dummy_ops = {
714 .get_frame = dummy_g_get_frame,
715 .wakeup = dummy_wakeup,
716 .set_selfpowered = dummy_set_selfpowered,
f1c39fad 717 .pullup = dummy_pullup,
1da177e4
LT		 718};
719
720/*-------------------------------------------------------------------------*/
721
722/* "function" sysfs attribute */
723static ssize_t
10523b3b 724show_function (struct device *dev, struct device_attribute *attr, char *buf)
1da177e4
LT		 725{
726 struct dummy *dum = gadget_dev_to_dummy (dev);
727
728 if (!dum->driver || !dum->driver->function)
729 return 0;
730 return scnprintf (buf, PAGE_SIZE, "%s\n", dum->driver->function);
731}
cc095b0b 732static DEVICE_ATTR (function, S_IRUGO, show_function, NULL);
1da177e4
LT		 733
734/*-------------------------------------------------------------------------*/
735
736/*
737 * Driver registration/unregistration.
738 *
739 * This is basically hardware-specific; there's usually only one real USB
740 * device (not host) controller since that's how USB devices are intended
741 * to work. So most implementations of these api calls will rely on the
742 * fact that only one driver will ever bind to the hardware. But curious
743 * hardware can be built with discrete components, so the gadget API doesn't
744 * require that assumption.
745 *
746 * For this emulator, it might be convenient to create a usb slave device
747 * for each driver that registers: just add to a big root hub.
748 */
749
1da177e4
LT		 750int
751usb_gadget_register_driver (struct usb_gadget_driver *driver)
752{
753 struct dummy *dum = the_controller;
754 int retval, i;
755
756 if (!dum)
757 return -EINVAL;
758 if (dum->driver)
759 return -EBUSY;
6bea476c 760 if (!driver->bind || !driver->setup
1da177e4
LT		 761 || driver->speed == USB_SPEED_UNKNOWN)
762 return -EINVAL;
763
764 /*
765 * SLAVE side init ... the layer above hardware, which
766 * can't enumerate without help from the driver we're binding.
767 */
5742b0c9 768
1da177e4 769 dum->devstatus = 0;
1da177e4
LT		 770
771 INIT_LIST_HEAD (&dum->gadget.ep_list);
772 for (i = 0; i < DUMMY_ENDPOINTS; i++) {
773 struct dummy_ep *ep = &dum->ep [i];
774
775 if (!ep_name [i])
776 break;
777 ep->ep.name = ep_name [i];
778 ep->ep.ops = &dummy_ep_ops;
779 list_add_tail (&ep->ep.ep_list, &dum->gadget.ep_list);
851a526d
AS		 780 ep->halted = ep->wedged = ep->already_seen =
781 ep->setup_stage = 0;
1da177e4
LT		 782 ep->ep.maxpacket = ~0;
783 ep->last_io = jiffies;
784 ep->gadget = &dum->gadget;
785 ep->desc = NULL;
786 INIT_LIST_HEAD (&ep->queue);
787 }
788
789 dum->gadget.ep0 = &dum->ep [0].ep;
790 dum->ep [0].ep.maxpacket = 64;
791 list_del_init (&dum->ep [0].ep.ep_list);
792 INIT_LIST_HEAD(&dum->fifo_req.queue);
793
59331017 794 driver->driver.bus = NULL;
1da177e4
LT		 795 dum->driver = driver;
796 dum->gadget.dev.driver = &driver->driver;
d9b76251 797 dev_dbg (udc_dev(dum), "binding gadget driver '%s'\n",
1da177e4 798 driver->driver.name);
59331017
AS		 799 retval = driver->bind(&dum->gadget);
800 if (retval) {
801 dum->driver = NULL;
802 dum->gadget.dev.driver = NULL;
803 return retval;
804 }
1da177e4
LT		 805
806 /* khubd will enumerate this in a while */
f1c39fad
AS		 807 spin_lock_irq (&dum->lock);
808 dum->pullup = 1;
809 set_link_state (dum);
810 spin_unlock_irq (&dum->lock);
685eb93f
AS		 811
812 usb_hcd_poll_rh_status (dummy_to_hcd (dum));
1da177e4
LT		 813 return 0;
814}
815EXPORT_SYMBOL (usb_gadget_register_driver);
816
1da177e4
LT		 817int
818usb_gadget_unregister_driver (struct usb_gadget_driver *driver)
819{
820 struct dummy *dum = the_controller;
821 unsigned long flags;
822
823 if (!dum)
824 return -ENODEV;
6bea476c 825 if (!driver || driver != dum->driver || !driver->unbind)
1da177e4
LT		 826 return -EINVAL;
827
d9b76251 828 dev_dbg (udc_dev(dum), "unregister gadget driver '%s'\n",
1da177e4
LT		 829 driver->driver.name);
830
831 spin_lock_irqsave (&dum->lock, flags);
f1c39fad
AS		 832 dum->pullup = 0;
833 set_link_state (dum);
1da177e4
LT		 834 spin_unlock_irqrestore (&dum->lock, flags);
835
836 driver->unbind (&dum->gadget);
59331017 837 dum->gadget.dev.driver = NULL;
1da177e4
LT		 838 dum->driver = NULL;
839
f1c39fad
AS		 840 spin_lock_irqsave (&dum->lock, flags);
841 dum->pullup = 0;
842 set_link_state (dum);
843 spin_unlock_irqrestore (&dum->lock, flags);
844
685eb93f 845 usb_hcd_poll_rh_status (dummy_to_hcd (dum));
1da177e4
LT		 846 return 0;
847}
848EXPORT_SYMBOL (usb_gadget_unregister_driver);
849
850#undef is_enabled
851
cc095b0b
AS		 852/* just declare this in any driver that really need it */
853extern int net2280_set_fifo_mode (struct usb_gadget *gadget, int mode);
854
1da177e4
LT		 855int net2280_set_fifo_mode (struct usb_gadget *gadget, int mode)
856{
857 return -ENOSYS;
858}
859EXPORT_SYMBOL (net2280_set_fifo_mode);
860
d9b76251
AS		 861
862/* The gadget structure is stored inside the hcd structure and will be
863 * released along with it. */
864static void
865dummy_gadget_release (struct device *dev)
866{
d9b76251
AS		 867 struct dummy *dum = gadget_dev_to_dummy (dev);
868
17200583 869 usb_put_hcd (dummy_to_hcd (dum));
d9b76251
AS		 870}
871
8364d6b0 872static int dummy_udc_probe (struct platform_device *pdev)
d9b76251
AS		 873{
874 struct dummy *dum = the_controller;
875 int rc;
876
877 dum->gadget.name = gadget_name;
878 dum->gadget.ops = &dummy_ops;
879 dum->gadget.is_dualspeed = 1;
880
881 /* maybe claim OTG support, though we won't complete HNP */
882 dum->gadget.is_otg = (dummy_to_hcd(dum)->self.otg_port != 0);
883
0031a06e 884 dev_set_name(&dum->gadget.dev, "gadget");
8364d6b0 885 dum->gadget.dev.parent = &pdev->dev;
d9b76251
AS		 886 dum->gadget.dev.release = dummy_gadget_release;
887 rc = device_register (&dum->gadget.dev);
888 if (rc < 0)
889 return rc;
890
17200583 891 usb_get_hcd (dummy_to_hcd (dum));
d9b76251 892
8364d6b0 893 platform_set_drvdata (pdev, dum);
efd54a36
AS		 894 rc = device_create_file (&dum->gadget.dev, &dev_attr_function);
895 if (rc < 0)
896 device_unregister (&dum->gadget.dev);
d9b76251
AS		 897 return rc;
898}
899
8364d6b0 900static int dummy_udc_remove (struct platform_device *pdev)
d9b76251 901{
8364d6b0 902 struct dummy *dum = platform_get_drvdata (pdev);
d9b76251 903
8364d6b0 904 platform_set_drvdata (pdev, NULL);
d9b76251
AS		 905 device_remove_file (&dum->gadget.dev, &dev_attr_function);
906 device_unregister (&dum->gadget.dev);
907 return 0;
908}
909
8364d6b0 910static int dummy_udc_suspend (struct platform_device *pdev, pm_message_t state)
391eca9d 911{
8364d6b0 912 struct dummy *dum = platform_get_drvdata(pdev);
391eca9d 913
441b62c1 914 dev_dbg (&pdev->dev, "%s\n", __func__);
391eca9d
AS		 915 spin_lock_irq (&dum->lock);
916 dum->udc_suspended = 1;
917 set_link_state (dum);
918 spin_unlock_irq (&dum->lock);
919
391eca9d
AS		 920 usb_hcd_poll_rh_status (dummy_to_hcd (dum));
921 return 0;
922}
923
8364d6b0 924static int dummy_udc_resume (struct platform_device *pdev)
391eca9d 925{
8364d6b0 926 struct dummy *dum = platform_get_drvdata(pdev);
391eca9d 927
441b62c1 928 dev_dbg (&pdev->dev, "%s\n", __func__);
391eca9d
AS		 929 spin_lock_irq (&dum->lock);
930 dum->udc_suspended = 0;
931 set_link_state (dum);
932 spin_unlock_irq (&dum->lock);
933
391eca9d
AS		 934 usb_hcd_poll_rh_status (dummy_to_hcd (dum));
935 return 0;
936}
937
3ae5eaec 938static struct platform_driver dummy_udc_driver = {
d9b76251
AS		 939 .probe = dummy_udc_probe,
940 .remove = dummy_udc_remove,
391eca9d
AS		 941 .suspend = dummy_udc_suspend,
942 .resume = dummy_udc_resume,
3ae5eaec
RK		 943 .driver = {
944 .name = (char *) gadget_name,
945 .owner = THIS_MODULE,
946 },
d9b76251
AS		 947};
948
1da177e4
LT		 949/*-------------------------------------------------------------------------*/
950
951/* MASTER/HOST SIDE DRIVER
952 *
953 * this uses the hcd framework to hook up to host side drivers.
954 * its root hub will only have one device, otherwise it acts like
955 * a normal host controller.
956 *
957 * when urbs are queued, they're just stuck on a list that we
958 * scan in a timer callback. that callback connects writes from
959 * the host with reads from the device, and so on, based on the
960 * usb 2.0 rules.
961 */
962
963static int dummy_urb_enqueue (
964 struct usb_hcd *hcd,
1da177e4 965 struct urb *urb,
55016f10 966 gfp_t mem_flags
1da177e4
LT		 967) {
968 struct dummy *dum;
969 struct urbp *urbp;
970 unsigned long flags;
e9df41c5 971 int rc;
1da177e4
LT		 972
973 if (!urb->transfer_buffer && urb->transfer_buffer_length)
974 return -EINVAL;
975
976 urbp = kmalloc (sizeof *urbp, mem_flags);
977 if (!urbp)
978 return -ENOMEM;
979 urbp->urb = urb;
980
981 dum = hcd_to_dummy (hcd);
982 spin_lock_irqsave (&dum->lock, flags);
e9df41c5
AS		 983 rc = usb_hcd_link_urb_to_ep(hcd, urb);
984 if (rc) {
985 kfree(urbp);
986 goto done;
987 }
1da177e4
LT		 988
989 if (!dum->udev) {
990 dum->udev = urb->dev;
991 usb_get_dev (dum->udev);
992 } else if (unlikely (dum->udev != urb->dev))
993 dev_err (dummy_dev(dum), "usb_device address has changed!\n");
994
995 list_add_tail (&urbp->urbp_list, &dum->urbp_list);
996 urb->hcpriv = urbp;
997 if (usb_pipetype (urb->pipe) == PIPE_CONTROL)
998 urb->error_count = 1; /* mark as a new urb */
999
1000 /* kick the scheduler, it'll do the rest */
1001 if (!timer_pending (&dum->timer))
1002 mod_timer (&dum->timer, jiffies + 1);
1003
e9df41c5 1004 done:
63f991b2 1005 spin_unlock_irqrestore(&dum->lock, flags);
e9df41c5 1006 return rc;
1da177e4
LT		 1007}
1008
e9df41c5 1009static int dummy_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status)
1da177e4 1010{
391eca9d
AS		 1011 struct dummy *dum;
1012 unsigned long flags;
e9df41c5 1013 int rc;
391eca9d
AS		 1014
1015 /* giveback happens automatically in timer callback,
1016 * so make sure the callback happens */
1017 dum = hcd_to_dummy (hcd);
1018 spin_lock_irqsave (&dum->lock, flags);
e9df41c5
AS		 1019
1020 rc = usb_hcd_check_unlink_urb(hcd, urb, status);
1021 if (!rc && dum->rh_state != DUMMY_RH_RUNNING &&
1022 !list_empty(&dum->urbp_list))
391eca9d 1023 mod_timer (&dum->timer, jiffies);
e9df41c5 1024
391eca9d 1025 spin_unlock_irqrestore (&dum->lock, flags);
e9df41c5 1026 return rc;
1da177e4
LT		 1027}
1028
1da177e4
LT		 1029/* transfer up to a frame's worth; caller must own lock */
1030static int
4d2f110c
AS		 1031transfer(struct dummy *dum, struct urb *urb, struct dummy_ep *ep, int limit,
1032 int *status)
1da177e4
LT		 1033{
1034 struct dummy_request *req;
1035
1036top:
1037 /* if there's no request queued, the device is NAKing; return */
1038 list_for_each_entry (req, &ep->queue, queue) {
1039 unsigned host_len, dev_len, len;
1040 int is_short, to_host;
1041 int rescan = 0;
1042
1043 /* 1..N packets of ep->ep.maxpacket each ... the last one
1044 * may be short (including zero length).
1045 *
1046 * writer can send a zlp explicitly (length 0) or implicitly
1047 * (length mod maxpacket zero, and 'zero' flag); they always
1048 * terminate reads.
1049 */
1050 host_len = urb->transfer_buffer_length - urb->actual_length;
1051 dev_len = req->req.length - req->req.actual;
1052 len = min (host_len, dev_len);
1053
1054 /* FIXME update emulated data toggle too */
1055
1056 to_host = usb_pipein (urb->pipe);
1057 if (unlikely (len == 0))
1058 is_short = 1;
1059 else {
1060 char *ubuf, *rbuf;
1061
1062 /* not enough bandwidth left? */
1063 if (limit < ep->ep.maxpacket && limit < len)
1064 break;
1065 len = min (len, (unsigned) limit);
1066 if (len == 0)
1067 break;
1068
1069 /* use an extra pass for the final short packet */
1070 if (len > ep->ep.maxpacket) {
1071 rescan = 1;
1072 len -= (len % ep->ep.maxpacket);
1073 }
1074 is_short = (len % ep->ep.maxpacket) != 0;
1075
1076 /* else transfer packet(s) */
1077 ubuf = urb->transfer_buffer + urb->actual_length;
1078 rbuf = req->req.buf + req->req.actual;
1079 if (to_host)
1080 memcpy (ubuf, rbuf, len);
1081 else
1082 memcpy (rbuf, ubuf, len);
1083 ep->last_io = jiffies;
1084
1085 limit -= len;
1086 urb->actual_length += len;
1087 req->req.actual += len;
1088 }
1089
1090 /* short packets terminate, maybe with overflow/underflow.
1091 * it's only really an error to write too much.
1092 *
1093 * partially filling a buffer optionally blocks queue advances
1094 * (so completion handlers can clean up the queue) but we don't
b0d9efba 1095 * need to emulate such data-in-flight.
1da177e4
LT		 1096 */
1097 if (is_short) {
1098 if (host_len == dev_len) {
1099 req->req.status = 0;
4d2f110c 1100 *status = 0;
1da177e4
LT		 1101 } else if (to_host) {
1102 req->req.status = 0;
1103 if (dev_len > host_len)
4d2f110c 1104 *status = -EOVERFLOW;
1da177e4 1105 else
4d2f110c 1106 *status = 0;
1da177e4 1107 } else if (!to_host) {
4d2f110c 1108 *status = 0;
1da177e4
LT		 1109 if (host_len > dev_len)
1110 req->req.status = -EOVERFLOW;
1111 else
1112 req->req.status = 0;
1113 }
1114
1115 /* many requests terminate without a short packet */
1116 } else {
1117 if (req->req.length == req->req.actual
1118 && !req->req.zero)
1119 req->req.status = 0;
1120 if (urb->transfer_buffer_length == urb->actual_length
1121 && !(urb->transfer_flags
4d2f110c
AS		 1122 & URB_ZERO_PACKET))
1123 *status = 0;
1da177e4
LT		 1124 }
1125
1126 /* device side completion --> continuable */
1127 if (req->req.status != -EINPROGRESS) {
1128 list_del_init (&req->queue);
1129
1130 spin_unlock (&dum->lock);
1131 req->req.complete (&ep->ep, &req->req);
1132 spin_lock (&dum->lock);
1133
1134 /* requests might have been unlinked... */
1135 rescan = 1;
1136 }
1137
1138 /* host side completion --> terminate */
4d2f110c 1139 if (*status != -EINPROGRESS)
1da177e4
LT		 1140 break;
1141
1142 /* rescan to continue with any other queued i/o */
1143 if (rescan)
1144 goto top;
1145 }
1146 return limit;
1147}
1148
1149static int periodic_bytes (struct dummy *dum, struct dummy_ep *ep)
1150{
1151 int limit = ep->ep.maxpacket;
1152
1153 if (dum->gadget.speed == USB_SPEED_HIGH) {
1154 int tmp;
1155
1156 /* high bandwidth mode */
1157 tmp = le16_to_cpu(ep->desc->wMaxPacketSize);
1da177e4
LT		 1158 tmp = (tmp >> 11) & 0x03;
1159 tmp *= 8 /* applies to entire frame */;
1160 limit += limit * tmp;
1161 }
1162 return limit;
1163}
1164
1165#define is_active(dum) ((dum->port_status & \
1166 (USB_PORT_STAT_CONNECTION | USB_PORT_STAT_ENABLE | \
1167 USB_PORT_STAT_SUSPEND)) \
1168 == (USB_PORT_STAT_CONNECTION | USB_PORT_STAT_ENABLE))
1169
1170static struct dummy_ep *find_endpoint (struct dummy *dum, u8 address)
1171{
1172 int i;
1173
1174 if (!is_active (dum))
1175 return NULL;
1176 if ((address & ~USB_DIR_IN) == 0)
1177 return &dum->ep [0];
1178 for (i = 1; i < DUMMY_ENDPOINTS; i++) {
1179 struct dummy_ep *ep = &dum->ep [i];
1180
1181 if (!ep->desc)
1182 continue;
1183 if (ep->desc->bEndpointAddress == address)
1184 return ep;
1185 }
1186 return NULL;
1187}
1188
1189#undef is_active
1190
1191#define Dev_Request (USB_TYPE_STANDARD | USB_RECIP_DEVICE)
1192#define Dev_InRequest (Dev_Request | USB_DIR_IN)
1193#define Intf_Request (USB_TYPE_STANDARD | USB_RECIP_INTERFACE)
1194#define Intf_InRequest (Intf_Request | USB_DIR_IN)
1195#define Ep_Request (USB_TYPE_STANDARD | USB_RECIP_ENDPOINT)
1196#define Ep_InRequest (Ep_Request | USB_DIR_IN)
1197
1198/* drive both sides of the transfers; looks like irq handlers to
1199 * both drivers except the callbacks aren't in_irq().
1200 */
1201static void dummy_timer (unsigned long _dum)
1202{
1203 struct dummy *dum = (struct dummy *) _dum;
1204 struct urbp *urbp, *tmp;
1205 unsigned long flags;
1206 int limit, total;
1207 int i;
1208
1209 /* simplistic model for one frame's bandwidth */
1210 switch (dum->gadget.speed) {
1211 case USB_SPEED_LOW:
1212 total = 8/*bytes*/ * 12/*packets*/;
1213 break;
1214 case USB_SPEED_FULL:
1215 total = 64/*bytes*/ * 19/*packets*/;
1216 break;
1217 case USB_SPEED_HIGH:
1218 total = 512/*bytes*/ * 13/*packets*/ * 8/*uframes*/;
1219 break;
1220 default:
1221 dev_err (dummy_dev(dum), "bogus device speed\n");
1222 return;
1223 }
1224
1225 /* FIXME if HZ != 1000 this will probably misbehave ... */
1226
1227 /* look at each urb queued by the host side driver */
1228 spin_lock_irqsave (&dum->lock, flags);
1229
1230 if (!dum->udev) {
1231 dev_err (dummy_dev(dum),
1232 "timer fired with no URBs pending?\n");
1233 spin_unlock_irqrestore (&dum->lock, flags);
1234 return;
1235 }
1236
1237 for (i = 0; i < DUMMY_ENDPOINTS; i++) {
1238 if (!ep_name [i])
1239 break;
1240 dum->ep [i].already_seen = 0;
1241 }
1242
1243restart:
1244 list_for_each_entry_safe (urbp, tmp, &dum->urbp_list, urbp_list) {
1245 struct urb *urb;
1246 struct dummy_request *req;
1247 u8 address;
1248 struct dummy_ep *ep = NULL;
1249 int type;
4d2f110c 1250 int status = -EINPROGRESS;
1da177e4
LT		 1251
1252 urb = urbp->urb;
eb231054 1253 if (urb->unlinked)
1da177e4 1254 goto return_urb;
eb231054 1255 else if (dum->rh_state != DUMMY_RH_RUNNING)
391eca9d 1256 continue;
1da177e4
LT		 1257 type = usb_pipetype (urb->pipe);
1258
1259 /* used up this frame's non-periodic bandwidth?
1260 * FIXME there's infinite bandwidth for control and
1261 * periodic transfers ... unrealistic.
1262 */
1263 if (total <= 0 && type == PIPE_BULK)
1264 continue;
1265
1266 /* find the gadget's ep for this request (if configured) */
1267 address = usb_pipeendpoint (urb->pipe);
1268 if (usb_pipein (urb->pipe))
1269 address |= USB_DIR_IN;
1270 ep = find_endpoint(dum, address);
1271 if (!ep) {
1272 /* set_configuration() disagreement */
1273 dev_dbg (dummy_dev(dum),
1274 "no ep configured for urb %p\n",
1275 urb);
4d2f110c 1276 status = -EPROTO;
1da177e4
LT		 1277 goto return_urb;
1278 }
1279
1280 if (ep->already_seen)
1281 continue;
1282 ep->already_seen = 1;
1283 if (ep == &dum->ep [0] && urb->error_count) {
1284 ep->setup_stage = 1; /* a new urb */
1285 urb->error_count = 0;
1286 }
1287 if (ep->halted && !ep->setup_stage) {
1288 /* NOTE: must not be iso! */
1289 dev_dbg (dummy_dev(dum), "ep %s halted, urb %p\n",
1290 ep->ep.name, urb);
4d2f110c 1291 status = -EPIPE;
1da177e4
LT		 1292 goto return_urb;
1293 }
1294 /* FIXME make sure both ends agree on maxpacket */
1295
1296 /* handle control requests */
1297 if (ep == &dum->ep [0] && ep->setup_stage) {
1298 struct usb_ctrlrequest setup;
1299 int value = 1;
1300 struct dummy_ep *ep2;
cc095b0b
AS		 1301 unsigned w_index;
1302 unsigned w_value;
1da177e4
LT		 1303
1304 setup = *(struct usb_ctrlrequest*) urb->setup_packet;
cc095b0b
AS		 1305 w_index = le16_to_cpu(setup.wIndex);
1306 w_value = le16_to_cpu(setup.wValue);
1da177e4
LT		 1307
1308 /* paranoia, in case of stale queued data */
1309 list_for_each_entry (req, &ep->queue, queue) {
1310 list_del_init (&req->queue);
1311 req->req.status = -EOVERFLOW;
d9b76251 1312 dev_dbg (udc_dev(dum), "stale req = %p\n",
1da177e4
LT		 1313 req);
1314
1315 spin_unlock (&dum->lock);
1316 req->req.complete (&ep->ep, &req->req);
1317 spin_lock (&dum->lock);
1318 ep->already_seen = 0;
1319 goto restart;
1320 }
1321
1322 /* gadget driver never sees set_address or operations
1323 * on standard feature flags. some hardware doesn't
1324 * even expose them.
1325 */
1326 ep->last_io = jiffies;
1327 ep->setup_stage = 0;
1328 ep->halted = 0;
1329 switch (setup.bRequest) {
1330 case USB_REQ_SET_ADDRESS:
1331 if (setup.bRequestType != Dev_Request)
1332 break;
cc095b0b 1333 dum->address = w_value;
4d2f110c 1334 status = 0;
d9b76251 1335 dev_dbg (udc_dev(dum), "set_address = %d\n",
cc095b0b 1336 w_value);
1da177e4
LT		 1337 value = 0;
1338 break;
1339 case USB_REQ_SET_FEATURE:
1340 if (setup.bRequestType == Dev_Request) {
1341 value = 0;
cc095b0b 1342 switch (w_value) {
1da177e4
LT		 1343 case USB_DEVICE_REMOTE_WAKEUP:
1344 break;
5742b0c9
AS		 1345 case USB_DEVICE_B_HNP_ENABLE:
1346 dum->gadget.b_hnp_enable = 1;
1347 break;
1348 case USB_DEVICE_A_HNP_SUPPORT:
1349 dum->gadget.a_hnp_support = 1;
1350 break;
1351 case USB_DEVICE_A_ALT_HNP_SUPPORT:
1352 dum->gadget.a_alt_hnp_support
1353 = 1;
1354 break;
1da177e4
LT		 1355 default:
1356 value = -EOPNOTSUPP;
1357 }
1358 if (value == 0) {
1359 dum->devstatus |=
cc095b0b 1360 (1 << w_value);
4d2f110c 1361 status = 0;
1da177e4
LT		 1362 }
1363
1364 } else if (setup.bRequestType == Ep_Request) {
1365 // endpoint halt
cc095b0b 1366 ep2 = find_endpoint (dum, w_index);
851a526d 1367 if (!ep2 || ep2->ep.name == ep0name) {
1da177e4
LT		 1368 value = -EOPNOTSUPP;
1369 break;
1370 }
1371 ep2->halted = 1;
1372 value = 0;
4d2f110c 1373 status = 0;
1da177e4
LT		 1374 }
1375 break;
1376 case USB_REQ_CLEAR_FEATURE:
1377 if (setup.bRequestType == Dev_Request) {
cc095b0b 1378 switch (w_value) {
1da177e4
LT		 1379 case USB_DEVICE_REMOTE_WAKEUP:
1380 dum->devstatus &= ~(1 <<
1381 USB_DEVICE_REMOTE_WAKEUP);
1382 value = 0;
4d2f110c 1383 status = 0;
1da177e4
LT		 1384 break;
1385 default:
1386 value = -EOPNOTSUPP;
1387 break;
1388 }
1389 } else if (setup.bRequestType == Ep_Request) {
1390 // endpoint halt
cc095b0b 1391 ep2 = find_endpoint (dum, w_index);
1da177e4
LT		 1392 if (!ep2) {
1393 value = -EOPNOTSUPP;
1394 break;
1395 }
851a526d
AS		 1396 if (!ep2->wedged)
1397 ep2->halted = 0;
1da177e4 1398 value = 0;
4d2f110c 1399 status = 0;
1da177e4
LT		 1400 }
1401 break;
1402 case USB_REQ_GET_STATUS:
1403 if (setup.bRequestType == Dev_InRequest
1404 || setup.bRequestType
1405 == Intf_InRequest
1406 || setup.bRequestType
1407 == Ep_InRequest
1408 ) {
1409 char *buf;
1410
1411 // device: remote wakeup, selfpowered
1412 // interface: nothing
1413 // endpoint: halt
1414 buf = (char *)urb->transfer_buffer;
1415 if (urb->transfer_buffer_length > 0) {
1416 if (setup.bRequestType ==
1417 Ep_InRequest) {
cc095b0b 1418 ep2 = find_endpoint (dum, w_index);
1da177e4
LT		 1419 if (!ep2) {
1420 value = -EOPNOTSUPP;
1421 break;
1422 }
1423 buf [0] = ep2->halted;
1424 } else if (setup.bRequestType ==
1425 Dev_InRequest) {
1426 buf [0] = (u8)
1427 dum->devstatus;
1428 } else
1429 buf [0] = 0;
1430 }
1431 if (urb->transfer_buffer_length > 1)
1432 buf [1] = 0;
16e2e5f6 1433 urb->actual_length = min_t(u32, 2,
1da177e4
LT		 1434 urb->transfer_buffer_length);
1435 value = 0;
4d2f110c 1436 status = 0;
1da177e4
LT		 1437 }
1438 break;
1439 }
1440
1441 /* gadget driver handles all other requests. block
1442 * until setup() returns; no reentrancy issues etc.
1443 */
1444 if (value > 0) {
1445 spin_unlock (&dum->lock);
1446 value = dum->driver->setup (&dum->gadget,
1447 &setup);
1448 spin_lock (&dum->lock);
1449
1450 if (value >= 0) {
1451 /* no delays (max 64KB data stage) */
1452 limit = 64*1024;
1453 goto treat_control_like_bulk;
1454 }
1455 /* error, see below */
1456 }
1457
1458 if (value < 0) {
1459 if (value != -EOPNOTSUPP)
d9b76251 1460 dev_dbg (udc_dev(dum),
1da177e4
LT		 1461 "setup --> %d\n",
1462 value);
4d2f110c 1463 status = -EPIPE;
1da177e4
LT		 1464 urb->actual_length = 0;
1465 }
1466
1467 goto return_urb;
1468 }
1469
1470 /* non-control requests */
1471 limit = total;
1472 switch (usb_pipetype (urb->pipe)) {
1473 case PIPE_ISOCHRONOUS:
1474 /* FIXME is it urb->interval since the last xfer?
1475 * use urb->iso_frame_desc[i].
1476 * complete whether or not ep has requests queued.
1477 * report random errors, to debug drivers.
1478 */
1479 limit = max (limit, periodic_bytes (dum, ep));
4d2f110c 1480 status = -ENOSYS;
1da177e4
LT		 1481 break;
1482
1483 case PIPE_INTERRUPT:
1484 /* FIXME is it urb->interval since the last xfer?
1485 * this almost certainly polls too fast.
1486 */
1487 limit = max (limit, periodic_bytes (dum, ep));
1488 /* FALLTHROUGH */
1489
1490 // case PIPE_BULK: case PIPE_CONTROL:
1491 default:
1492 treat_control_like_bulk:
1493 ep->last_io = jiffies;
4d2f110c 1494 total = transfer(dum, urb, ep, limit, &status);
1da177e4
LT		 1495 break;
1496 }
1497
1498 /* incomplete transfer? */
4d2f110c 1499 if (status == -EINPROGRESS)
1da177e4
LT		 1500 continue;
1501
1502return_urb:
1da177e4
LT		 1503 list_del (&urbp->urbp_list);
1504 kfree (urbp);
1505 if (ep)
1506 ep->already_seen = ep->setup_stage = 0;
1507
e9df41c5 1508 usb_hcd_unlink_urb_from_ep(dummy_to_hcd(dum), urb);
1da177e4 1509 spin_unlock (&dum->lock);
4a00027d 1510 usb_hcd_giveback_urb(dummy_to_hcd(dum), urb, status);
1da177e4
LT		 1511 spin_lock (&dum->lock);
1512
1513 goto restart;
1514 }
1515
391eca9d 1516 if (list_empty (&dum->urbp_list)) {
1da177e4
LT		 1517 usb_put_dev (dum->udev);
1518 dum->udev = NULL;
391eca9d
AS		 1519 } else if (dum->rh_state == DUMMY_RH_RUNNING) {
1520 /* want a 1 msec delay here */
1521 mod_timer (&dum->timer, jiffies + msecs_to_jiffies(1));
1da177e4
LT		 1522 }
1523
1524 spin_unlock_irqrestore (&dum->lock, flags);
1525}
1526
1527/*-------------------------------------------------------------------------*/
1528
1529#define PORT_C_MASK \
c2db8b5e
AS		 1530 ((USB_PORT_STAT_C_CONNECTION \
1531 | USB_PORT_STAT_C_ENABLE \
1532 | USB_PORT_STAT_C_SUSPEND \
1533 | USB_PORT_STAT_C_OVERCURRENT \
1534 | USB_PORT_STAT_C_RESET) << 16)
1da177e4
LT		 1535
1536static int dummy_hub_status (struct usb_hcd *hcd, char *buf)
1537{
1538 struct dummy *dum;
1539 unsigned long flags;
391eca9d 1540 int retval = 0;
1da177e4
LT		 1541
1542 dum = hcd_to_dummy (hcd);
1543
1544 spin_lock_irqsave (&dum->lock, flags);
3cf0a22e 1545 if (!test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags))
391eca9d 1546 goto done;
f1c39fad
AS		 1547
1548 if (dum->resuming && time_after_eq (jiffies, dum->re_timeout)) {
1549 dum->port_status |= (USB_PORT_STAT_C_SUSPEND << 16);
1550 dum->port_status &= ~USB_PORT_STAT_SUSPEND;
1551 set_link_state (dum);
1552 }
1553
391eca9d 1554 if ((dum->port_status & PORT_C_MASK) != 0) {
1da177e4
LT		 1555 *buf = (1 << 1);
1556 dev_dbg (dummy_dev(dum), "port status 0x%08x has changes\n",
391eca9d 1557 dum->port_status);
1da177e4 1558 retval = 1;
391eca9d
AS		 1559 if (dum->rh_state == DUMMY_RH_SUSPENDED)
1560 usb_hcd_resume_root_hub (hcd);
1da177e4 1561 }
391eca9d 1562done:
1da177e4
LT		 1563 spin_unlock_irqrestore (&dum->lock, flags);
1564 return retval;
1565}
1566
1567static inline void
1568hub_descriptor (struct usb_hub_descriptor *desc)
1569{
1570 memset (desc, 0, sizeof *desc);
1571 desc->bDescriptorType = 0x29;
1572 desc->bDescLength = 9;
fd05e720 1573 desc->wHubCharacteristics = cpu_to_le16(0x0001);
1da177e4
LT		 1574 desc->bNbrPorts = 1;
1575 desc->bitmap [0] = 0xff;
1576 desc->bitmap [1] = 0xff;
1577}
1578
1579static int dummy_hub_control (
1580 struct usb_hcd *hcd,
1581 u16 typeReq,
1582 u16 wValue,
1583 u16 wIndex,
1584 char *buf,
1585 u16 wLength
1586) {
1587 struct dummy *dum;
1588 int retval = 0;
1589 unsigned long flags;
1590
3cf0a22e 1591 if (!test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags))
391eca9d
AS		 1592 return -ETIMEDOUT;
1593
1da177e4
LT		 1594 dum = hcd_to_dummy (hcd);
1595 spin_lock_irqsave (&dum->lock, flags);
1596 switch (typeReq) {
1597 case ClearHubFeature:
1598 break;
1599 case ClearPortFeature:
1600 switch (wValue) {
1601 case USB_PORT_FEAT_SUSPEND:
c2db8b5e 1602 if (dum->port_status & USB_PORT_STAT_SUSPEND) {
1da177e4
LT		 1603 /* 20msec resume signaling */
1604 dum->resuming = 1;
1605 dum->re_timeout = jiffies +
f1c39fad 1606 msecs_to_jiffies(20);
1da177e4
LT		 1607 }
1608 break;
1609 case USB_PORT_FEAT_POWER:
f1c39fad
AS		 1610 if (dum->port_status & USB_PORT_STAT_POWER)
1611 dev_dbg (dummy_dev(dum), "power-off\n");
1612 /* FALLS THROUGH */
1da177e4
LT		 1613 default:
1614 dum->port_status &= ~(1 << wValue);
f1c39fad 1615 set_link_state (dum);
1da177e4
LT		 1616 }
1617 break;
1618 case GetHubDescriptor:
1619 hub_descriptor ((struct usb_hub_descriptor *) buf);
1620 break;
1621 case GetHubStatus:
551509d2 1622 *(__le32 *) buf = cpu_to_le32 (0);
1da177e4
LT		 1623 break;
1624 case GetPortStatus:
1625 if (wIndex != 1)
1626 retval = -EPIPE;
1627
1628 /* whoever resets or resumes must GetPortStatus to
1629 * complete it!!
1630 */
f1c39fad
AS		 1631 if (dum->resuming &&
1632 time_after_eq (jiffies, dum->re_timeout)) {
c2db8b5e
AS		 1633 dum->port_status |= (USB_PORT_STAT_C_SUSPEND << 16);
1634 dum->port_status &= ~USB_PORT_STAT_SUSPEND;
1da177e4 1635 }
f1c39fad
AS		 1636 if ((dum->port_status & USB_PORT_STAT_RESET) != 0 &&
1637 time_after_eq (jiffies, dum->re_timeout)) {
c2db8b5e
AS		 1638 dum->port_status |= (USB_PORT_STAT_C_RESET << 16);
1639 dum->port_status &= ~USB_PORT_STAT_RESET;
f1c39fad 1640 if (dum->pullup) {
1da177e4
LT		 1641 dum->port_status |= USB_PORT_STAT_ENABLE;
1642 /* give it the best speed we agree on */
1643 dum->gadget.speed = dum->driver->speed;
1644 dum->gadget.ep0->maxpacket = 64;
1645 switch (dum->gadget.speed) {
1646 case USB_SPEED_HIGH:
1647 dum->port_status |=
1648 USB_PORT_STAT_HIGH_SPEED;
1649 break;
1650 case USB_SPEED_LOW:
1651 dum->gadget.ep0->maxpacket = 8;
1652 dum->port_status |=
1653 USB_PORT_STAT_LOW_SPEED;
1654 break;
1655 default:
1656 dum->gadget.speed = USB_SPEED_FULL;
1657 break;
1658 }
1659 }
1660 }
f1c39fad 1661 set_link_state (dum);
cc095b0b
AS		 1662 ((__le16 *) buf)[0] = cpu_to_le16 (dum->port_status);
1663 ((__le16 *) buf)[1] = cpu_to_le16 (dum->port_status >> 16);
1da177e4
LT		 1664 break;
1665 case SetHubFeature:
1666 retval = -EPIPE;
1667 break;
1668 case SetPortFeature:
1669 switch (wValue) {
1670 case USB_PORT_FEAT_SUSPEND:
f1c39fad 1671 if (dum->active) {
c2db8b5e 1672 dum->port_status |= USB_PORT_STAT_SUSPEND;
f1c39fad
AS		 1673
1674 /* HNP would happen here; for now we
1675 * assume b_bus_req is always true.
1676 */
1677 set_link_state (dum);
1678 if (((1 << USB_DEVICE_B_HNP_ENABLE)
1679 & dum->devstatus) != 0)
1680 dev_dbg (dummy_dev(dum),
5742b0c9 1681 "no HNP yet!\n");
1da177e4
LT		 1682 }
1683 break;
f1c39fad
AS		 1684 case USB_PORT_FEAT_POWER:
1685 dum->port_status |= USB_PORT_STAT_POWER;
1686 set_link_state (dum);
1687 break;
1da177e4 1688 case USB_PORT_FEAT_RESET:
f1c39fad
AS		 1689 /* if it's already enabled, disable */
1690 dum->port_status &= ~(USB_PORT_STAT_ENABLE
1691 | USB_PORT_STAT_LOW_SPEED
1692 | USB_PORT_STAT_HIGH_SPEED);
391eca9d 1693 dum->devstatus = 0;
1da177e4
LT		 1694 /* 50msec reset signaling */
1695 dum->re_timeout = jiffies + msecs_to_jiffies(50);
f1c39fad 1696 /* FALLS THROUGH */
1da177e4 1697 default:
f1c39fad
AS		 1698 if ((dum->port_status & USB_PORT_STAT_POWER) != 0) {
1699 dum->port_status |= (1 << wValue);
1700 set_link_state (dum);
1701 }
1da177e4
LT		 1702 }
1703 break;
1704
1705 default:
1706 dev_dbg (dummy_dev(dum),
1707 "hub control req%04x v%04x i%04x l%d\n",
1708 typeReq, wValue, wIndex, wLength);
1709
1710 /* "protocol stall" on error */
1711 retval = -EPIPE;
1712 }
1713 spin_unlock_irqrestore (&dum->lock, flags);
685eb93f
AS		 1714
1715 if ((dum->port_status & PORT_C_MASK) != 0)
1716 usb_hcd_poll_rh_status (hcd);
1da177e4
LT		 1717 return retval;
1718}
1719
0c0382e3 1720static int dummy_bus_suspend (struct usb_hcd *hcd)
391eca9d
AS		 1721{
1722 struct dummy *dum = hcd_to_dummy (hcd);
1723
441b62c1 1724 dev_dbg (&hcd->self.root_hub->dev, "%s\n", __func__);
3cf0a22e 1725
391eca9d
AS		 1726 spin_lock_irq (&dum->lock);
1727 dum->rh_state = DUMMY_RH_SUSPENDED;
1728 set_link_state (dum);
3cf0a22e 1729 hcd->state = HC_STATE_SUSPENDED;
391eca9d
AS		 1730 spin_unlock_irq (&dum->lock);
1731 return 0;
1732}
1733
0c0382e3 1734static int dummy_bus_resume (struct usb_hcd *hcd)
391eca9d
AS		 1735{
1736 struct dummy *dum = hcd_to_dummy (hcd);
3cf0a22e
AS		 1737 int rc = 0;
1738
441b62c1 1739 dev_dbg (&hcd->self.root_hub->dev, "%s\n", __func__);
391eca9d
AS		 1740
1741 spin_lock_irq (&dum->lock);
3cf0a22e 1742 if (!test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags)) {
cfa59dab 1743 rc = -ESHUTDOWN;
3cf0a22e
AS		 1744 } else {
1745 dum->rh_state = DUMMY_RH_RUNNING;
1746 set_link_state (dum);
1747 if (!list_empty(&dum->urbp_list))
1748 mod_timer (&dum->timer, jiffies);
1749 hcd->state = HC_STATE_RUNNING;
1750 }
391eca9d 1751 spin_unlock_irq (&dum->lock);
3cf0a22e 1752 return rc;
391eca9d 1753}
1da177e4
LT		 1754
1755/*-------------------------------------------------------------------------*/
1756
1757static inline ssize_t
1758show_urb (char *buf, size_t size, struct urb *urb)
1759{
1760 int ep = usb_pipeendpoint (urb->pipe);
1761
1762 return snprintf (buf, size,
1763 "urb/%p %s ep%d%s%s len %d/%d\n",
1764 urb,
1765 ({ char *s;
1766 switch (urb->dev->speed) {
1767 case USB_SPEED_LOW: s = "ls"; break;
1768 case USB_SPEED_FULL: s = "fs"; break;
1769 case USB_SPEED_HIGH: s = "hs"; break;
1770 default: s = "?"; break;
1771 }; s; }),
1772 ep, ep ? (usb_pipein (urb->pipe) ? "in" : "out") : "",
1773 ({ char *s; \
1774 switch (usb_pipetype (urb->pipe)) { \
1775 case PIPE_CONTROL: s = ""; break; \
1776 case PIPE_BULK: s = "-bulk"; break; \
1777 case PIPE_INTERRUPT: s = "-int"; break; \
1778 default: s = "-iso"; break; \
1779 }; s;}),
1780 urb->actual_length, urb->transfer_buffer_length);
1781}
1782
1783static ssize_t
10523b3b 1784show_urbs (struct device *dev, struct device_attribute *attr, char *buf)
1da177e4
LT		 1785{
1786 struct usb_hcd *hcd = dev_get_drvdata (dev);
1787 struct dummy *dum = hcd_to_dummy (hcd);
1788 struct urbp *urbp;
1789 size_t size = 0;
1790 unsigned long flags;
1791
1792 spin_lock_irqsave (&dum->lock, flags);
1793 list_for_each_entry (urbp, &dum->urbp_list, urbp_list) {
1794 size_t temp;
1795
1796 temp = show_urb (buf, PAGE_SIZE - size, urbp->urb);
1797 buf += temp;
1798 size += temp;
1799 }
1800 spin_unlock_irqrestore (&dum->lock, flags);
1801
1802 return size;
1803}
1804static DEVICE_ATTR (urbs, S_IRUGO, show_urbs, NULL);
1805
1806static int dummy_start (struct usb_hcd *hcd)
1807{
1808 struct dummy *dum;
1da177e4
LT		 1809
1810 dum = hcd_to_dummy (hcd);
1811
1812 /*
1813 * MASTER side init ... we emulate a root hub that'll only ever
1814 * talk to one device (the slave side). Also appears in sysfs,
1815 * just like more familiar pci-based HCDs.
1816 */
1817 spin_lock_init (&dum->lock);
1818 init_timer (&dum->timer);
1819 dum->timer.function = dummy_timer;
1820 dum->timer.data = (unsigned long) dum;
391eca9d 1821 dum->rh_state = DUMMY_RH_RUNNING;
1da177e4
LT		 1822
1823 INIT_LIST_HEAD (&dum->urbp_list);
1824
caf29f62 1825 hcd->power_budget = POWER_BUDGET;
1da177e4 1826 hcd->state = HC_STATE_RUNNING;
685eb93f 1827 hcd->uses_new_polling = 1;
1da177e4 1828
5742b0c9
AS		 1829#ifdef CONFIG_USB_OTG
1830 hcd->self.otg_port = 1;
1831#endif
1832
1da177e4 1833 /* FIXME 'urbs' should be a per-device thing, maybe in usbcore */
efd54a36 1834 return device_create_file (dummy_dev(dum), &dev_attr_urbs);
1da177e4
LT		 1835}
1836
1837static void dummy_stop (struct usb_hcd *hcd)
1838{
1839 struct dummy *dum;
1840
1841 dum = hcd_to_dummy (hcd);
1842
1843 device_remove_file (dummy_dev(dum), &dev_attr_urbs);
1da177e4 1844 usb_gadget_unregister_driver (dum->driver);
1da177e4
LT		 1845 dev_info (dummy_dev(dum), "stopped\n");
1846}
1847
1848/*-------------------------------------------------------------------------*/
1849
1850static int dummy_h_get_frame (struct usb_hcd *hcd)
1851{
1852 return dummy_g_get_frame (NULL);
1853}
1854
1855static const struct hc_driver dummy_hcd = {
1856 .description = (char *) driver_name,
1857 .product_desc = "Dummy host controller",
1858 .hcd_priv_size = sizeof(struct dummy),
1859
1860 .flags = HCD_USB2,
1861
1862 .start = dummy_start,
1863 .stop = dummy_stop,
1864
1865 .urb_enqueue = dummy_urb_enqueue,
1866 .urb_dequeue = dummy_urb_dequeue,
1867
1868 .get_frame_number = dummy_h_get_frame,
1869
1870 .hub_status_data = dummy_hub_status,
1871 .hub_control = dummy_hub_control,
0c0382e3
AS		 1872 .bus_suspend = dummy_bus_suspend,
1873 .bus_resume = dummy_bus_resume,
1da177e4
LT		 1874};
1875
8364d6b0 1876static int dummy_hcd_probe(struct platform_device *pdev)
1da177e4
LT		 1877{
1878 struct usb_hcd *hcd;
1879 int retval;
1880
8364d6b0 1881 dev_info(&pdev->dev, "%s, driver " DRIVER_VERSION "\n", driver_desc);
1da177e4 1882
7071a3ce 1883 hcd = usb_create_hcd(&dummy_hcd, &pdev->dev, dev_name(&pdev->dev));
1da177e4
LT		 1884 if (!hcd)
1885 return -ENOMEM;
1886 the_controller = hcd_to_dummy (hcd);
1887
1888 retval = usb_add_hcd(hcd, 0, 0);
1889 if (retval != 0) {
1890 usb_put_hcd (hcd);
1891 the_controller = NULL;
1892 }
1893 return retval;
1894}
1895
8364d6b0 1896static int dummy_hcd_remove (struct platform_device *pdev)
1da177e4
LT		 1897{
1898 struct usb_hcd *hcd;
1899
8364d6b0 1900 hcd = platform_get_drvdata (pdev);
1da177e4
LT		 1901 usb_remove_hcd (hcd);
1902 usb_put_hcd (hcd);
1903 the_controller = NULL;
d9b76251 1904 return 0;
1da177e4
LT		 1905}
1906
8364d6b0 1907static int dummy_hcd_suspend (struct platform_device *pdev, pm_message_t state)
391eca9d
AS		 1908{
1909 struct usb_hcd *hcd;
3cf0a22e
AS		 1910 struct dummy *dum;
1911 int rc = 0;
391eca9d 1912
441b62c1 1913 dev_dbg (&pdev->dev, "%s\n", __func__);
391eca9d 1914
3cf0a22e
AS		 1915 hcd = platform_get_drvdata (pdev);
1916 dum = hcd_to_dummy (hcd);
1917 if (dum->rh_state == DUMMY_RH_RUNNING) {
1918 dev_warn(&pdev->dev, "Root hub isn't suspended!\n");
1919 rc = -EBUSY;
1920 } else
1921 clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
1922 return rc;
391eca9d
AS		 1923}
1924
8364d6b0 1925static int dummy_hcd_resume (struct platform_device *pdev)
391eca9d
AS		 1926{
1927 struct usb_hcd *hcd;
1928
441b62c1 1929 dev_dbg (&pdev->dev, "%s\n", __func__);
391eca9d 1930
3cf0a22e
AS		 1931 hcd = platform_get_drvdata (pdev);
1932 set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
391eca9d
AS		 1933 usb_hcd_poll_rh_status (hcd);
1934 return 0;
1935}
1936
3ae5eaec 1937static struct platform_driver dummy_hcd_driver = {
d9b76251
AS		 1938 .probe = dummy_hcd_probe,
1939 .remove = dummy_hcd_remove,
391eca9d
AS		 1940 .suspend = dummy_hcd_suspend,
1941 .resume = dummy_hcd_resume,
3ae5eaec
RK		 1942 .driver = {
1943 .name = (char *) driver_name,
1944 .owner = THIS_MODULE,
1945 },
d9b76251 1946};
1da177e4 1947
d9b76251 1948/*-------------------------------------------------------------------------*/
1da177e4 1949
a89a2cd3
AS		 1950static struct platform_device *the_udc_pdev;
1951static struct platform_device *the_hcd_pdev;
1da177e4
LT		 1952
1953static int __init init (void)
1954{
a89a2cd3 1955 int retval = -ENOMEM;
1da177e4
LT		 1956
1957 if (usb_disabled ())
1958 return -ENODEV;
d9b76251 1959
a89a2cd3
AS		 1960 the_hcd_pdev = platform_device_alloc(driver_name, -1);
1961 if (!the_hcd_pdev)
1da177e4 1962 return retval;
a89a2cd3
AS		 1963 the_udc_pdev = platform_device_alloc(gadget_name, -1);
1964 if (!the_udc_pdev)
1965 goto err_alloc_udc;
d9b76251 1966
a89a2cd3
AS		 1967 retval = platform_driver_register(&dummy_hcd_driver);
1968 if (retval < 0)
1969 goto err_register_hcd_driver;
1970 retval = platform_driver_register(&dummy_udc_driver);
d9b76251
AS		 1971 if (retval < 0)
1972 goto err_register_udc_driver;
1973
a89a2cd3 1974 retval = platform_device_add(the_hcd_pdev);
d9b76251 1975 if (retval < 0)
a89a2cd3
AS		 1976 goto err_add_hcd;
1977 retval = platform_device_add(the_udc_pdev);
d9b76251 1978 if (retval < 0)
a89a2cd3 1979 goto err_add_udc;
d9b76251
AS		 1980 return retval;
1981
a89a2cd3
AS		 1982err_add_udc:
1983 platform_device_del(the_hcd_pdev);
1984err_add_hcd:
1985 platform_driver_unregister(&dummy_udc_driver);
d9b76251 1986err_register_udc_driver:
a89a2cd3
AS		 1987 platform_driver_unregister(&dummy_hcd_driver);
1988err_register_hcd_driver:
1989 platform_device_put(the_udc_pdev);
1990err_alloc_udc:
1991 platform_device_put(the_hcd_pdev);
1da177e4
LT		 1992 return retval;
1993}
1994module_init (init);
1995
1996static void __exit cleanup (void)
1997{
a89a2cd3
AS		 1998 platform_device_unregister(the_udc_pdev);
1999 platform_device_unregister(the_hcd_pdev);
2000 platform_driver_unregister(&dummy_udc_driver);
2001 platform_driver_unregister(&dummy_hcd_driver);
1da177e4
LT		 2002}
2003module_exit (cleanup);
Linux 6.x block layer and io_uring tree(s)