blob: 13b9f47feecd6e3e4719444f8c730b9e2f2129dc [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
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
Linus Torvalds1da177e2005-04-16 15:20:36 -070037#include <linux/module.h>
38#include <linux/kernel.h>
39#include <linux/delay.h>
40#include <linux/ioport.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070041#include <linux/slab.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070042#include <linux/errno.h>
43#include <linux/init.h>
44#include <linux/timer.h>
45#include <linux/list.h>
46#include <linux/interrupt.h>
Russell Kingd052d1b2005-10-29 19:07:23 +010047#include <linux/platform_device.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070048#include <linux/usb.h>
David Brownell9454a572007-10-04 18:05:17 -070049#include <linux/usb/gadget.h>
Eric Lescouet27729aa2010-04-24 23:21:52 +020050#include <linux/usb/hcd.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070051
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
Linus Torvalds1da177e2005-04-16 15:20:36 -070059#define DRIVER_DESC "USB Host+Gadget Emulator"
Alan Stern391eca92005-05-10 15:34:16 -040060#define DRIVER_VERSION "02 May 2005"
Linus Torvalds1da177e2005-04-16 15:20:36 -070061
Alan Sterncaf29f62007-12-06 11:10:39 -050062#define POWER_BUDGET 500 /* in mA; use 8 for low-power port testing */
63
Linus Torvalds1da177e2005-04-16 15:20:36 -070064static 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;
Alan Stern851a5262008-08-14 15:48:30 -040083 unsigned wedged : 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -070084 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};
Tobias Klauser52950ed2005-12-11 16:20:08 +0100137#define DUMMY_ENDPOINTS ARRAY_SIZE(ep_name)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700138
Alan Sternd9b76252005-05-03 16:15:43 -0400139/*-------------------------------------------------------------------------*/
140
Linus Torvalds1da177e2005-04-16 15:20:36 -0700141#define FIFO_SIZE 64
142
143struct urbp {
144 struct urb *urb;
145 struct list_head urbp_list;
146};
147
Alan Stern391eca92005-05-10 15:34:16 -0400148
149enum dummy_rh_state {
150 DUMMY_RH_RESET,
151 DUMMY_RH_SUSPENDED,
152 DUMMY_RH_RUNNING
153};
154
Linus Torvalds1da177e2005-04-16 15:20:36 -0700155struct 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;
Alan Stern391eca92005-05-10 15:34:16 -0400168 unsigned udc_suspended:1;
Alan Sternf1c39fa2005-05-03 16:24:04 -0400169 unsigned pullup:1;
170 unsigned active:1;
171 unsigned old_active:1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700172
173 /*
174 * MASTER/HOST side support
175 */
Alan Stern391eca92005-05-10 15:34:16 -0400176 enum dummy_rh_state rh_state;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700177 struct timer_list timer;
178 u32 port_status;
Alan Sternf1c39fa2005-05-03 16:24:04 -0400179 u32 old_status;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700180 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
Alan Sternd9b76252005-05-03 16:15:43 -0400202static inline struct device *udc_dev (struct dummy *dum)
203{
204 return dum->gadget.dev.parent;
205}
206
Linus Torvalds1da177e2005-04-16 15:20:36 -0700207static 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
Alan Sternf1c39fa2005-05-03 16:24:04 -0400226/* 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;
Alan Stern391eca92005-05-10 15:34:16 -0400269
270 /* UDC suspend must cause a disconnect */
271 else if (!dum->pullup || dum->udc_suspended) {
Alan Sternf1c39fa2005-05-03 16:24:04 -0400272 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;
Alan Stern391eca92005-05-10 15:34:16 -0400285 else if ((dum->port_status & USB_PORT_STAT_SUSPEND) == 0 &&
286 dum->rh_state != DUMMY_RH_SUSPENDED)
Alan Sternf1c39fa2005-05-03 16:24:04 -0400287 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
Linus Torvalds1da177e2005-04-16 15:20:36 -0700321/* 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;
Ingo van Lil9063ff42008-03-28 14:50:26 -0700367 goto done;
368 case USB_SPEED_FULL:
369 if (max == 8 || max == 16 || max == 32 || max == 64)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700370 /* we'll fake any legal size */
371 break;
Ingo van Lil9063ff42008-03-28 14:50:26 -0700372 /* save a return statement */
373 default:
374 goto done;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700375 }
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
Alan Sternd9b76252005-05-03 16:15:43 -0400422 dev_dbg (udc_dev(dum), "enabled %s (ep%d%s-%s) maxpacket %d\n",
Linus Torvalds1da177e2005-04-16 15:20:36 -0700423 _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 */
Alan Stern851a5262008-08-14 15:48:30 -0400438 ep->halted = ep->wedged = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700439 retval = 0;
440done:
441 return retval;
442}
443
Linus Torvalds1da177e2005-04-16 15:20:36 -0700444static 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
Alan Sternd9b76252005-05-03 16:15:43 -0400462 dev_dbg (udc_dev(dum), "disabled %s\n", _ep->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700463 return retval;
464}
465
466static struct usb_request *
Al Viro55016f12005-10-21 03:21:58 -0400467dummy_alloc_request (struct usb_ep *_ep, gfp_t mem_flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700468{
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
Eric Sesterhenn7039f422006-02-27 13:34:10 -0800476 req = kzalloc(sizeof(*req), mem_flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700477 if (!req)
478 return NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700479 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
Linus Torvalds1da177e2005-04-16 15:20:36 -0700498static void
499fifo_complete (struct usb_ep *ep, struct usb_request *req)
500{
501}
502
503static int
Olav Kongas5db539e2005-06-23 20:25:36 +0300504dummy_queue (struct usb_ep *_ep, struct usb_request *_req,
Al Viro55016f12005-10-21 03:21:58 -0400505 gfp_t mem_flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700506{
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
Alan Sternd9b76252005-05-03 16:15:43 -0400525 dev_dbg (udc_dev(dum), "ep %p queue req %p to %s, len %d buf %p\n",
Linus Torvalds1da177e2005-04-16 15:20:36 -0700526 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
David Brownellc728df72008-07-26 08:06:24 -0700545 list_add_tail(&req->queue, &ep->queue);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700546 spin_unlock (&dum->lock);
547 _req->actual = _req->length;
548 _req->status = 0;
549 _req->complete (_ep, _req);
550 spin_lock (&dum->lock);
David Brownellc728df72008-07-26 08:06:24 -0700551 } else
552 list_add_tail(&req->queue, &ep->queue);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700553 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
Alan Sternb4dbda12006-07-28 17:07:34 -0400577 local_irq_save (flags);
578 spin_lock (&dum->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700579 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 }
Alan Sternb4dbda12006-07-28 17:07:34 -0400587 spin_unlock (&dum->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700588
589 if (retval == 0) {
Alan Sternd9b76252005-05-03 16:15:43 -0400590 dev_dbg (udc_dev(dum),
Linus Torvalds1da177e2005-04-16 15:20:36 -0700591 "dequeued req %p from %s, len %d buf %p\n",
592 req, _ep->name, _req->length, _req->buf);
593 _req->complete (_ep, _req);
594 }
Alan Sternb4dbda12006-07-28 17:07:34 -0400595 local_irq_restore (flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700596 return retval;
597}
598
599static int
Alan Stern851a5262008-08-14 15:48:30 -0400600dummy_set_halt_and_wedge(struct usb_ep *_ep, int value, int wedged)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700601{
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)
Alan Stern851a5262008-08-14 15:48:30 -0400612 ep->halted = ep->wedged = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700613 else if (ep->desc && (ep->desc->bEndpointAddress & USB_DIR_IN) &&
614 !list_empty (&ep->queue))
615 return -EAGAIN;
Alan Stern851a5262008-08-14 15:48:30 -0400616 else {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700617 ep->halted = 1;
Alan Stern851a5262008-08-14 15:48:30 -0400618 if (wedged)
619 ep->wedged = 1;
620 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700621 /* FIXME clear emulated data toggle too */
622 return 0;
623}
624
Alan Stern851a5262008-08-14 15:48:30 -0400625static 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
Linus Torvalds1da177e2005-04-16 15:20:36 -0700638static 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
Linus Torvalds1da177e2005-04-16 15:20:36 -0700645 .queue = dummy_queue,
646 .dequeue = dummy_dequeue,
647
648 .set_halt = dummy_set_halt,
Alan Stern851a5262008-08-14 15:48:30 -0400649 .set_wedge = dummy_set_wedge,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700650};
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);
Alan Stern391eca92005-05-10 15:34:16 -0400668 if (!(dum->devstatus & ( (1 << USB_DEVICE_B_HNP_ENABLE)
Alan Stern5742b0c2005-05-02 11:25:17 -0400669 | (1 << USB_DEVICE_REMOTE_WAKEUP))))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700670 return -EINVAL;
Alan Stern391eca92005-05-10 15:34:16 -0400671 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? */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700678
679 /* hub notices our request, issues downstream resume, etc */
680 dum->resuming = 1;
Alan Sternf1c39fa2005-05-03 16:24:04 -0400681 dum->re_timeout = jiffies + msecs_to_jiffies(20);
Alan Stern685eb932005-05-03 16:27:26 -0400682 mod_timer (&dummy_to_hcd (dum)->rh_timer, dum->re_timeout);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700683 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
Alan Sternf1c39fa2005-05-03 16:24:04 -0400698static 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);
Alan Stern685eb932005-05-03 16:27:26 -0400708
709 usb_hcd_poll_rh_status (dummy_to_hcd (dum));
Alan Sternf1c39fa2005-05-03 16:24:04 -0400710 return 0;
711}
712
Linus Torvalds1da177e2005-04-16 15:20:36 -0700713static const struct usb_gadget_ops dummy_ops = {
714 .get_frame = dummy_g_get_frame,
715 .wakeup = dummy_wakeup,
716 .set_selfpowered = dummy_set_selfpowered,
Alan Sternf1c39fa2005-05-03 16:24:04 -0400717 .pullup = dummy_pullup,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700718};
719
720/*-------------------------------------------------------------------------*/
721
722/* "function" sysfs attribute */
723static ssize_t
Yani Ioannou10523b32005-05-17 06:43:37 -0400724show_function (struct device *dev, struct device_attribute *attr, char *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700725{
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}
Alan Sterncc095b02005-05-10 15:28:38 -0400732static DEVICE_ATTR (function, S_IRUGO, show_function, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700733
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
Linus Torvalds1da177e2005-04-16 15:20:36 -0700750int
Uwe Kleine-Königb0fca502010-08-12 17:43:53 +0200751usb_gadget_probe_driver(struct usb_gadget_driver *driver,
752 int (*bind)(struct usb_gadget *))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700753{
754 struct dummy *dum = the_controller;
755 int retval, i;
756
757 if (!dum)
758 return -EINVAL;
759 if (dum->driver)
760 return -EBUSY;
Uwe Kleine-Königb0fca502010-08-12 17:43:53 +0200761 if (!bind || !driver->setup || driver->speed == USB_SPEED_UNKNOWN)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700762 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 */
Alan Stern5742b0c2005-05-02 11:25:17 -0400768
Linus Torvalds1da177e2005-04-16 15:20:36 -0700769 dum->devstatus = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700770
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);
Alan Stern851a5262008-08-14 15:48:30 -0400780 ep->halted = ep->wedged = ep->already_seen =
781 ep->setup_stage = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700782 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
Alan Stern59331012007-11-20 16:28:55 -0500794 driver->driver.bus = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700795 dum->driver = driver;
796 dum->gadget.dev.driver = &driver->driver;
Alan Sternd9b76252005-05-03 16:15:43 -0400797 dev_dbg (udc_dev(dum), "binding gadget driver '%s'\n",
Linus Torvalds1da177e2005-04-16 15:20:36 -0700798 driver->driver.name);
Uwe Kleine-Königb0fca502010-08-12 17:43:53 +0200799 retval = bind(&dum->gadget);
Alan Stern59331012007-11-20 16:28:55 -0500800 if (retval) {
801 dum->driver = NULL;
802 dum->gadget.dev.driver = NULL;
803 return retval;
804 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700805
806 /* khubd will enumerate this in a while */
Alan Sternf1c39fa2005-05-03 16:24:04 -0400807 spin_lock_irq (&dum->lock);
808 dum->pullup = 1;
809 set_link_state (dum);
810 spin_unlock_irq (&dum->lock);
Alan Stern685eb932005-05-03 16:27:26 -0400811
812 usb_hcd_poll_rh_status (dummy_to_hcd (dum));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700813 return 0;
814}
Uwe Kleine-Königb0fca502010-08-12 17:43:53 +0200815EXPORT_SYMBOL(usb_gadget_probe_driver);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700816
Linus Torvalds1da177e2005-04-16 15:20:36 -0700817int
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;
David Brownell6bea4762006-12-05 03:15:33 -0800825 if (!driver || driver != dum->driver || !driver->unbind)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700826 return -EINVAL;
827
Alan Sternd9b76252005-05-03 16:15:43 -0400828 dev_dbg (udc_dev(dum), "unregister gadget driver '%s'\n",
Linus Torvalds1da177e2005-04-16 15:20:36 -0700829 driver->driver.name);
830
831 spin_lock_irqsave (&dum->lock, flags);
Alan Sternf1c39fa2005-05-03 16:24:04 -0400832 dum->pullup = 0;
833 set_link_state (dum);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700834 spin_unlock_irqrestore (&dum->lock, flags);
835
836 driver->unbind (&dum->gadget);
Alan Stern59331012007-11-20 16:28:55 -0500837 dum->gadget.dev.driver = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700838 dum->driver = NULL;
839
Alan Sternf1c39fa2005-05-03 16:24:04 -0400840 spin_lock_irqsave (&dum->lock, flags);
841 dum->pullup = 0;
842 set_link_state (dum);
843 spin_unlock_irqrestore (&dum->lock, flags);
844
Alan Stern685eb932005-05-03 16:27:26 -0400845 usb_hcd_poll_rh_status (dummy_to_hcd (dum));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700846 return 0;
847}
848EXPORT_SYMBOL (usb_gadget_unregister_driver);
849
850#undef is_enabled
851
Alan Sterncc095b02005-05-10 15:28:38 -0400852/* just declare this in any driver that really need it */
853extern int net2280_set_fifo_mode (struct usb_gadget *gadget, int mode);
854
Linus Torvalds1da177e2005-04-16 15:20:36 -0700855int net2280_set_fifo_mode (struct usb_gadget *gadget, int mode)
856{
857 return -ENOSYS;
858}
859EXPORT_SYMBOL (net2280_set_fifo_mode);
860
Alan Sternd9b76252005-05-03 16:15:43 -0400861
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{
Alan Sternd9b76252005-05-03 16:15:43 -0400867 struct dummy *dum = gadget_dev_to_dummy (dev);
868
Alan Stern17200582006-08-30 11:32:52 -0400869 usb_put_hcd (dummy_to_hcd (dum));
Alan Sternd9b76252005-05-03 16:15:43 -0400870}
871
Alan Stern8364d6b2005-11-14 12:16:30 -0500872static int dummy_udc_probe (struct platform_device *pdev)
Alan Sternd9b76252005-05-03 16:15:43 -0400873{
874 struct dummy *dum = the_controller;
875 int rc;
876
Rahul Ruikar75d87cd2010-10-07 09:40:45 +0530877 usb_get_hcd(dummy_to_hcd(dum));
878
Alan Sternd9b76252005-05-03 16:15:43 -0400879 dum->gadget.name = gadget_name;
880 dum->gadget.ops = &dummy_ops;
881 dum->gadget.is_dualspeed = 1;
882
883 /* maybe claim OTG support, though we won't complete HNP */
884 dum->gadget.is_otg = (dummy_to_hcd(dum)->self.otg_port != 0);
885
Kay Sievers0031a062008-05-02 06:02:41 +0200886 dev_set_name(&dum->gadget.dev, "gadget");
Alan Stern8364d6b2005-11-14 12:16:30 -0500887 dum->gadget.dev.parent = &pdev->dev;
Alan Sternd9b76252005-05-03 16:15:43 -0400888 dum->gadget.dev.release = dummy_gadget_release;
889 rc = device_register (&dum->gadget.dev);
Rahul Ruikar75d87cd2010-10-07 09:40:45 +0530890 if (rc < 0) {
891 put_device(&dum->gadget.dev);
Alan Sternd9b76252005-05-03 16:15:43 -0400892 return rc;
Rahul Ruikar75d87cd2010-10-07 09:40:45 +0530893 }
Alan Sternd9b76252005-05-03 16:15:43 -0400894
Alan Stern8364d6b2005-11-14 12:16:30 -0500895 platform_set_drvdata (pdev, dum);
Alan Sternefd54a32006-09-25 11:55:56 -0400896 rc = device_create_file (&dum->gadget.dev, &dev_attr_function);
897 if (rc < 0)
898 device_unregister (&dum->gadget.dev);
Alan Sternd9b76252005-05-03 16:15:43 -0400899 return rc;
900}
901
Alan Stern8364d6b2005-11-14 12:16:30 -0500902static int dummy_udc_remove (struct platform_device *pdev)
Alan Sternd9b76252005-05-03 16:15:43 -0400903{
Alan Stern8364d6b2005-11-14 12:16:30 -0500904 struct dummy *dum = platform_get_drvdata (pdev);
Alan Sternd9b76252005-05-03 16:15:43 -0400905
Alan Stern8364d6b2005-11-14 12:16:30 -0500906 platform_set_drvdata (pdev, NULL);
Alan Sternd9b76252005-05-03 16:15:43 -0400907 device_remove_file (&dum->gadget.dev, &dev_attr_function);
908 device_unregister (&dum->gadget.dev);
909 return 0;
910}
911
Alan Stern8364d6b2005-11-14 12:16:30 -0500912static int dummy_udc_suspend (struct platform_device *pdev, pm_message_t state)
Alan Stern391eca92005-05-10 15:34:16 -0400913{
Alan Stern8364d6b2005-11-14 12:16:30 -0500914 struct dummy *dum = platform_get_drvdata(pdev);
Alan Stern391eca92005-05-10 15:34:16 -0400915
Harvey Harrison441b62c2008-03-03 16:08:34 -0800916 dev_dbg (&pdev->dev, "%s\n", __func__);
Alan Stern391eca92005-05-10 15:34:16 -0400917 spin_lock_irq (&dum->lock);
918 dum->udc_suspended = 1;
919 set_link_state (dum);
920 spin_unlock_irq (&dum->lock);
921
Alan Stern391eca92005-05-10 15:34:16 -0400922 usb_hcd_poll_rh_status (dummy_to_hcd (dum));
923 return 0;
924}
925
Alan Stern8364d6b2005-11-14 12:16:30 -0500926static int dummy_udc_resume (struct platform_device *pdev)
Alan Stern391eca92005-05-10 15:34:16 -0400927{
Alan Stern8364d6b2005-11-14 12:16:30 -0500928 struct dummy *dum = platform_get_drvdata(pdev);
Alan Stern391eca92005-05-10 15:34:16 -0400929
Harvey Harrison441b62c2008-03-03 16:08:34 -0800930 dev_dbg (&pdev->dev, "%s\n", __func__);
Alan Stern391eca92005-05-10 15:34:16 -0400931 spin_lock_irq (&dum->lock);
932 dum->udc_suspended = 0;
933 set_link_state (dum);
934 spin_unlock_irq (&dum->lock);
935
Alan Stern391eca92005-05-10 15:34:16 -0400936 usb_hcd_poll_rh_status (dummy_to_hcd (dum));
937 return 0;
938}
939
Russell King3ae5eae2005-11-09 22:32:44 +0000940static struct platform_driver dummy_udc_driver = {
Alan Sternd9b76252005-05-03 16:15:43 -0400941 .probe = dummy_udc_probe,
942 .remove = dummy_udc_remove,
Alan Stern391eca92005-05-10 15:34:16 -0400943 .suspend = dummy_udc_suspend,
944 .resume = dummy_udc_resume,
Russell King3ae5eae2005-11-09 22:32:44 +0000945 .driver = {
946 .name = (char *) gadget_name,
947 .owner = THIS_MODULE,
948 },
Alan Sternd9b76252005-05-03 16:15:43 -0400949};
950
Linus Torvalds1da177e2005-04-16 15:20:36 -0700951/*-------------------------------------------------------------------------*/
952
953/* MASTER/HOST SIDE DRIVER
954 *
955 * this uses the hcd framework to hook up to host side drivers.
956 * its root hub will only have one device, otherwise it acts like
957 * a normal host controller.
958 *
959 * when urbs are queued, they're just stuck on a list that we
960 * scan in a timer callback. that callback connects writes from
961 * the host with reads from the device, and so on, based on the
962 * usb 2.0 rules.
963 */
964
965static int dummy_urb_enqueue (
966 struct usb_hcd *hcd,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700967 struct urb *urb,
Al Viro55016f12005-10-21 03:21:58 -0400968 gfp_t mem_flags
Linus Torvalds1da177e2005-04-16 15:20:36 -0700969) {
970 struct dummy *dum;
971 struct urbp *urbp;
972 unsigned long flags;
Alan Sterne9df41c2007-08-08 11:48:02 -0400973 int rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700974
975 if (!urb->transfer_buffer && urb->transfer_buffer_length)
976 return -EINVAL;
977
978 urbp = kmalloc (sizeof *urbp, mem_flags);
979 if (!urbp)
980 return -ENOMEM;
981 urbp->urb = urb;
982
983 dum = hcd_to_dummy (hcd);
984 spin_lock_irqsave (&dum->lock, flags);
Alan Sterne9df41c2007-08-08 11:48:02 -0400985 rc = usb_hcd_link_urb_to_ep(hcd, urb);
986 if (rc) {
987 kfree(urbp);
988 goto done;
989 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700990
991 if (!dum->udev) {
992 dum->udev = urb->dev;
993 usb_get_dev (dum->udev);
994 } else if (unlikely (dum->udev != urb->dev))
995 dev_err (dummy_dev(dum), "usb_device address has changed!\n");
996
997 list_add_tail (&urbp->urbp_list, &dum->urbp_list);
998 urb->hcpriv = urbp;
999 if (usb_pipetype (urb->pipe) == PIPE_CONTROL)
1000 urb->error_count = 1; /* mark as a new urb */
1001
1002 /* kick the scheduler, it'll do the rest */
1003 if (!timer_pending (&dum->timer))
1004 mod_timer (&dum->timer, jiffies + 1);
1005
Alan Sterne9df41c2007-08-08 11:48:02 -04001006 done:
Alan Stern63f991b2007-09-04 09:53:24 -04001007 spin_unlock_irqrestore(&dum->lock, flags);
Alan Sterne9df41c2007-08-08 11:48:02 -04001008 return rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001009}
1010
Alan Sterne9df41c2007-08-08 11:48:02 -04001011static int dummy_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001012{
Alan Stern391eca92005-05-10 15:34:16 -04001013 struct dummy *dum;
1014 unsigned long flags;
Alan Sterne9df41c2007-08-08 11:48:02 -04001015 int rc;
Alan Stern391eca92005-05-10 15:34:16 -04001016
1017 /* giveback happens automatically in timer callback,
1018 * so make sure the callback happens */
1019 dum = hcd_to_dummy (hcd);
1020 spin_lock_irqsave (&dum->lock, flags);
Alan Sterne9df41c2007-08-08 11:48:02 -04001021
1022 rc = usb_hcd_check_unlink_urb(hcd, urb, status);
1023 if (!rc && dum->rh_state != DUMMY_RH_RUNNING &&
1024 !list_empty(&dum->urbp_list))
Alan Stern391eca92005-05-10 15:34:16 -04001025 mod_timer (&dum->timer, jiffies);
Alan Sterne9df41c2007-08-08 11:48:02 -04001026
Alan Stern391eca92005-05-10 15:34:16 -04001027 spin_unlock_irqrestore (&dum->lock, flags);
Alan Sterne9df41c2007-08-08 11:48:02 -04001028 return rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001029}
1030
Linus Torvalds1da177e2005-04-16 15:20:36 -07001031/* transfer up to a frame's worth; caller must own lock */
1032static int
Alan Stern4d2f1102007-08-24 15:40:10 -04001033transfer(struct dummy *dum, struct urb *urb, struct dummy_ep *ep, int limit,
1034 int *status)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001035{
1036 struct dummy_request *req;
1037
1038top:
1039 /* if there's no request queued, the device is NAKing; return */
1040 list_for_each_entry (req, &ep->queue, queue) {
1041 unsigned host_len, dev_len, len;
1042 int is_short, to_host;
1043 int rescan = 0;
1044
1045 /* 1..N packets of ep->ep.maxpacket each ... the last one
1046 * may be short (including zero length).
1047 *
1048 * writer can send a zlp explicitly (length 0) or implicitly
1049 * (length mod maxpacket zero, and 'zero' flag); they always
1050 * terminate reads.
1051 */
1052 host_len = urb->transfer_buffer_length - urb->actual_length;
1053 dev_len = req->req.length - req->req.actual;
1054 len = min (host_len, dev_len);
1055
1056 /* FIXME update emulated data toggle too */
1057
1058 to_host = usb_pipein (urb->pipe);
1059 if (unlikely (len == 0))
1060 is_short = 1;
1061 else {
1062 char *ubuf, *rbuf;
1063
1064 /* not enough bandwidth left? */
1065 if (limit < ep->ep.maxpacket && limit < len)
1066 break;
1067 len = min (len, (unsigned) limit);
1068 if (len == 0)
1069 break;
1070
1071 /* use an extra pass for the final short packet */
1072 if (len > ep->ep.maxpacket) {
1073 rescan = 1;
1074 len -= (len % ep->ep.maxpacket);
1075 }
1076 is_short = (len % ep->ep.maxpacket) != 0;
1077
1078 /* else transfer packet(s) */
1079 ubuf = urb->transfer_buffer + urb->actual_length;
1080 rbuf = req->req.buf + req->req.actual;
1081 if (to_host)
1082 memcpy (ubuf, rbuf, len);
1083 else
1084 memcpy (rbuf, ubuf, len);
1085 ep->last_io = jiffies;
1086
1087 limit -= len;
1088 urb->actual_length += len;
1089 req->req.actual += len;
1090 }
1091
1092 /* short packets terminate, maybe with overflow/underflow.
1093 * it's only really an error to write too much.
1094 *
1095 * partially filling a buffer optionally blocks queue advances
1096 * (so completion handlers can clean up the queue) but we don't
Alan Sternb0d9efb2007-08-21 15:39:21 -04001097 * need to emulate such data-in-flight.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001098 */
1099 if (is_short) {
1100 if (host_len == dev_len) {
1101 req->req.status = 0;
Alan Stern4d2f1102007-08-24 15:40:10 -04001102 *status = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001103 } else if (to_host) {
1104 req->req.status = 0;
1105 if (dev_len > host_len)
Alan Stern4d2f1102007-08-24 15:40:10 -04001106 *status = -EOVERFLOW;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001107 else
Alan Stern4d2f1102007-08-24 15:40:10 -04001108 *status = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001109 } else if (!to_host) {
Alan Stern4d2f1102007-08-24 15:40:10 -04001110 *status = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001111 if (host_len > dev_len)
1112 req->req.status = -EOVERFLOW;
1113 else
1114 req->req.status = 0;
1115 }
1116
1117 /* many requests terminate without a short packet */
1118 } else {
1119 if (req->req.length == req->req.actual
1120 && !req->req.zero)
1121 req->req.status = 0;
1122 if (urb->transfer_buffer_length == urb->actual_length
1123 && !(urb->transfer_flags
Alan Stern4d2f1102007-08-24 15:40:10 -04001124 & URB_ZERO_PACKET))
1125 *status = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001126 }
1127
1128 /* device side completion --> continuable */
1129 if (req->req.status != -EINPROGRESS) {
1130 list_del_init (&req->queue);
1131
1132 spin_unlock (&dum->lock);
1133 req->req.complete (&ep->ep, &req->req);
1134 spin_lock (&dum->lock);
1135
1136 /* requests might have been unlinked... */
1137 rescan = 1;
1138 }
1139
1140 /* host side completion --> terminate */
Alan Stern4d2f1102007-08-24 15:40:10 -04001141 if (*status != -EINPROGRESS)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001142 break;
1143
1144 /* rescan to continue with any other queued i/o */
1145 if (rescan)
1146 goto top;
1147 }
1148 return limit;
1149}
1150
1151static int periodic_bytes (struct dummy *dum, struct dummy_ep *ep)
1152{
1153 int limit = ep->ep.maxpacket;
1154
1155 if (dum->gadget.speed == USB_SPEED_HIGH) {
1156 int tmp;
1157
1158 /* high bandwidth mode */
1159 tmp = le16_to_cpu(ep->desc->wMaxPacketSize);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001160 tmp = (tmp >> 11) & 0x03;
1161 tmp *= 8 /* applies to entire frame */;
1162 limit += limit * tmp;
1163 }
1164 return limit;
1165}
1166
1167#define is_active(dum) ((dum->port_status & \
1168 (USB_PORT_STAT_CONNECTION | USB_PORT_STAT_ENABLE | \
1169 USB_PORT_STAT_SUSPEND)) \
1170 == (USB_PORT_STAT_CONNECTION | USB_PORT_STAT_ENABLE))
1171
1172static struct dummy_ep *find_endpoint (struct dummy *dum, u8 address)
1173{
1174 int i;
1175
1176 if (!is_active (dum))
1177 return NULL;
1178 if ((address & ~USB_DIR_IN) == 0)
1179 return &dum->ep [0];
1180 for (i = 1; i < DUMMY_ENDPOINTS; i++) {
1181 struct dummy_ep *ep = &dum->ep [i];
1182
1183 if (!ep->desc)
1184 continue;
1185 if (ep->desc->bEndpointAddress == address)
1186 return ep;
1187 }
1188 return NULL;
1189}
1190
1191#undef is_active
1192
1193#define Dev_Request (USB_TYPE_STANDARD | USB_RECIP_DEVICE)
1194#define Dev_InRequest (Dev_Request | USB_DIR_IN)
1195#define Intf_Request (USB_TYPE_STANDARD | USB_RECIP_INTERFACE)
1196#define Intf_InRequest (Intf_Request | USB_DIR_IN)
1197#define Ep_Request (USB_TYPE_STANDARD | USB_RECIP_ENDPOINT)
1198#define Ep_InRequest (Ep_Request | USB_DIR_IN)
1199
Tatyana Brokhman8be8a9d2010-11-01 17:38:05 +02001200
1201/**
1202 * handle_control_request() - handles all control transfers
1203 * @dum: pointer to dummy (the_controller)
1204 * @urb: the urb request to handle
1205 * @setup: pointer to the setup data for a USB device control
1206 * request
1207 * @status: pointer to request handling status
1208 *
1209 * Return 0 - if the request was handled
1210 * 1 - if the request wasn't handles
1211 * error code on error
1212 */
1213static int handle_control_request(struct dummy *dum, struct urb *urb,
1214 struct usb_ctrlrequest *setup,
1215 int *status)
1216{
1217 struct dummy_ep *ep2;
1218 int ret_val = 1;
1219 unsigned w_index;
1220 unsigned w_value;
1221
1222 w_index = le16_to_cpu(setup->wIndex);
1223 w_value = le16_to_cpu(setup->wValue);
1224 switch (setup->bRequest) {
1225 case USB_REQ_SET_ADDRESS:
1226 if (setup->bRequestType != Dev_Request)
1227 break;
1228 dum->address = w_value;
1229 *status = 0;
1230 dev_dbg(udc_dev(dum), "set_address = %d\n",
1231 w_value);
1232 ret_val = 0;
1233 break;
1234 case USB_REQ_SET_FEATURE:
1235 if (setup->bRequestType == Dev_Request) {
1236 ret_val = 0;
1237 switch (w_value) {
1238 case USB_DEVICE_REMOTE_WAKEUP:
1239 break;
1240 case USB_DEVICE_B_HNP_ENABLE:
1241 dum->gadget.b_hnp_enable = 1;
1242 break;
1243 case USB_DEVICE_A_HNP_SUPPORT:
1244 dum->gadget.a_hnp_support = 1;
1245 break;
1246 case USB_DEVICE_A_ALT_HNP_SUPPORT:
1247 dum->gadget.a_alt_hnp_support = 1;
1248 break;
1249 default:
1250 ret_val = -EOPNOTSUPP;
1251 }
1252 if (ret_val == 0) {
1253 dum->devstatus |= (1 << w_value);
1254 *status = 0;
1255 }
1256 } else if (setup->bRequestType == Ep_Request) {
1257 /* endpoint halt */
1258 ep2 = find_endpoint(dum, w_index);
1259 if (!ep2 || ep2->ep.name == ep0name) {
1260 ret_val = -EOPNOTSUPP;
1261 break;
1262 }
1263 ep2->halted = 1;
1264 ret_val = 0;
1265 *status = 0;
1266 }
1267 break;
1268 case USB_REQ_CLEAR_FEATURE:
1269 if (setup->bRequestType == Dev_Request) {
1270 ret_val = 0;
1271 switch (w_value) {
1272 case USB_DEVICE_REMOTE_WAKEUP:
1273 w_value = USB_DEVICE_REMOTE_WAKEUP;
1274 break;
1275 default:
1276 ret_val = -EOPNOTSUPP;
1277 break;
1278 }
1279 if (ret_val == 0) {
1280 dum->devstatus &= ~(1 << w_value);
1281 *status = 0;
1282 }
1283 } else if (setup->bRequestType == Ep_Request) {
1284 /* endpoint halt */
1285 ep2 = find_endpoint(dum, w_index);
1286 if (!ep2) {
1287 ret_val = -EOPNOTSUPP;
1288 break;
1289 }
1290 if (!ep2->wedged)
1291 ep2->halted = 0;
1292 ret_val = 0;
1293 *status = 0;
1294 }
1295 break;
1296 case USB_REQ_GET_STATUS:
1297 if (setup->bRequestType == Dev_InRequest
1298 || setup->bRequestType == Intf_InRequest
1299 || setup->bRequestType == Ep_InRequest) {
1300 char *buf;
1301 /*
1302 * device: remote wakeup, selfpowered
1303 * interface: nothing
1304 * endpoint: halt
1305 */
1306 buf = (char *)urb->transfer_buffer;
1307 if (urb->transfer_buffer_length > 0) {
1308 if (setup->bRequestType == Ep_InRequest) {
1309 ep2 = find_endpoint(dum, w_index);
1310 if (!ep2) {
1311 ret_val = -EOPNOTSUPP;
1312 break;
1313 }
1314 buf[0] = ep2->halted;
1315 } else if (setup->bRequestType ==
1316 Dev_InRequest) {
1317 buf[0] = (u8)dum->devstatus;
1318 } else
1319 buf[0] = 0;
1320 }
1321 if (urb->transfer_buffer_length > 1)
1322 buf[1] = 0;
1323 urb->actual_length = min_t(u32, 2,
1324 urb->transfer_buffer_length);
1325 ret_val = 0;
1326 *status = 0;
1327 }
1328 break;
1329 }
1330 return ret_val;
1331}
1332
Linus Torvalds1da177e2005-04-16 15:20:36 -07001333/* drive both sides of the transfers; looks like irq handlers to
1334 * both drivers except the callbacks aren't in_irq().
1335 */
1336static void dummy_timer (unsigned long _dum)
1337{
1338 struct dummy *dum = (struct dummy *) _dum;
1339 struct urbp *urbp, *tmp;
1340 unsigned long flags;
1341 int limit, total;
1342 int i;
1343
1344 /* simplistic model for one frame's bandwidth */
1345 switch (dum->gadget.speed) {
1346 case USB_SPEED_LOW:
1347 total = 8/*bytes*/ * 12/*packets*/;
1348 break;
1349 case USB_SPEED_FULL:
1350 total = 64/*bytes*/ * 19/*packets*/;
1351 break;
1352 case USB_SPEED_HIGH:
1353 total = 512/*bytes*/ * 13/*packets*/ * 8/*uframes*/;
1354 break;
1355 default:
1356 dev_err (dummy_dev(dum), "bogus device speed\n");
1357 return;
1358 }
1359
1360 /* FIXME if HZ != 1000 this will probably misbehave ... */
1361
1362 /* look at each urb queued by the host side driver */
1363 spin_lock_irqsave (&dum->lock, flags);
1364
1365 if (!dum->udev) {
1366 dev_err (dummy_dev(dum),
1367 "timer fired with no URBs pending?\n");
1368 spin_unlock_irqrestore (&dum->lock, flags);
1369 return;
1370 }
1371
1372 for (i = 0; i < DUMMY_ENDPOINTS; i++) {
1373 if (!ep_name [i])
1374 break;
1375 dum->ep [i].already_seen = 0;
1376 }
1377
1378restart:
1379 list_for_each_entry_safe (urbp, tmp, &dum->urbp_list, urbp_list) {
1380 struct urb *urb;
1381 struct dummy_request *req;
1382 u8 address;
1383 struct dummy_ep *ep = NULL;
1384 int type;
Alan Stern4d2f1102007-08-24 15:40:10 -04001385 int status = -EINPROGRESS;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001386
1387 urb = urbp->urb;
Alan Sterneb231052007-08-21 15:40:36 -04001388 if (urb->unlinked)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001389 goto return_urb;
Alan Sterneb231052007-08-21 15:40:36 -04001390 else if (dum->rh_state != DUMMY_RH_RUNNING)
Alan Stern391eca92005-05-10 15:34:16 -04001391 continue;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001392 type = usb_pipetype (urb->pipe);
1393
1394 /* used up this frame's non-periodic bandwidth?
1395 * FIXME there's infinite bandwidth for control and
1396 * periodic transfers ... unrealistic.
1397 */
1398 if (total <= 0 && type == PIPE_BULK)
1399 continue;
1400
1401 /* find the gadget's ep for this request (if configured) */
1402 address = usb_pipeendpoint (urb->pipe);
1403 if (usb_pipein (urb->pipe))
1404 address |= USB_DIR_IN;
1405 ep = find_endpoint(dum, address);
1406 if (!ep) {
1407 /* set_configuration() disagreement */
1408 dev_dbg (dummy_dev(dum),
1409 "no ep configured for urb %p\n",
1410 urb);
Alan Stern4d2f1102007-08-24 15:40:10 -04001411 status = -EPROTO;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001412 goto return_urb;
1413 }
1414
1415 if (ep->already_seen)
1416 continue;
1417 ep->already_seen = 1;
1418 if (ep == &dum->ep [0] && urb->error_count) {
1419 ep->setup_stage = 1; /* a new urb */
1420 urb->error_count = 0;
1421 }
1422 if (ep->halted && !ep->setup_stage) {
1423 /* NOTE: must not be iso! */
1424 dev_dbg (dummy_dev(dum), "ep %s halted, urb %p\n",
1425 ep->ep.name, urb);
Alan Stern4d2f1102007-08-24 15:40:10 -04001426 status = -EPIPE;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001427 goto return_urb;
1428 }
1429 /* FIXME make sure both ends agree on maxpacket */
1430
1431 /* handle control requests */
1432 if (ep == &dum->ep [0] && ep->setup_stage) {
1433 struct usb_ctrlrequest setup;
1434 int value = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001435
1436 setup = *(struct usb_ctrlrequest*) urb->setup_packet;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001437 /* paranoia, in case of stale queued data */
1438 list_for_each_entry (req, &ep->queue, queue) {
1439 list_del_init (&req->queue);
1440 req->req.status = -EOVERFLOW;
Alan Sternd9b76252005-05-03 16:15:43 -04001441 dev_dbg (udc_dev(dum), "stale req = %p\n",
Linus Torvalds1da177e2005-04-16 15:20:36 -07001442 req);
1443
1444 spin_unlock (&dum->lock);
1445 req->req.complete (&ep->ep, &req->req);
1446 spin_lock (&dum->lock);
1447 ep->already_seen = 0;
1448 goto restart;
1449 }
1450
1451 /* gadget driver never sees set_address or operations
1452 * on standard feature flags. some hardware doesn't
1453 * even expose them.
1454 */
1455 ep->last_io = jiffies;
1456 ep->setup_stage = 0;
1457 ep->halted = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001458
Tatyana Brokhman8be8a9d2010-11-01 17:38:05 +02001459 value = handle_control_request(dum, urb, &setup,
1460 &status);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001461
1462 /* gadget driver handles all other requests. block
1463 * until setup() returns; no reentrancy issues etc.
1464 */
1465 if (value > 0) {
1466 spin_unlock (&dum->lock);
1467 value = dum->driver->setup (&dum->gadget,
1468 &setup);
1469 spin_lock (&dum->lock);
1470
1471 if (value >= 0) {
1472 /* no delays (max 64KB data stage) */
1473 limit = 64*1024;
1474 goto treat_control_like_bulk;
1475 }
1476 /* error, see below */
1477 }
1478
1479 if (value < 0) {
1480 if (value != -EOPNOTSUPP)
Alan Sternd9b76252005-05-03 16:15:43 -04001481 dev_dbg (udc_dev(dum),
Linus Torvalds1da177e2005-04-16 15:20:36 -07001482 "setup --> %d\n",
1483 value);
Alan Stern4d2f1102007-08-24 15:40:10 -04001484 status = -EPIPE;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001485 urb->actual_length = 0;
1486 }
1487
1488 goto return_urb;
1489 }
1490
1491 /* non-control requests */
1492 limit = total;
1493 switch (usb_pipetype (urb->pipe)) {
1494 case PIPE_ISOCHRONOUS:
1495 /* FIXME is it urb->interval since the last xfer?
1496 * use urb->iso_frame_desc[i].
1497 * complete whether or not ep has requests queued.
1498 * report random errors, to debug drivers.
1499 */
1500 limit = max (limit, periodic_bytes (dum, ep));
Alan Stern4d2f1102007-08-24 15:40:10 -04001501 status = -ENOSYS;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001502 break;
1503
1504 case PIPE_INTERRUPT:
1505 /* FIXME is it urb->interval since the last xfer?
1506 * this almost certainly polls too fast.
1507 */
1508 limit = max (limit, periodic_bytes (dum, ep));
1509 /* FALLTHROUGH */
1510
1511 // case PIPE_BULK: case PIPE_CONTROL:
1512 default:
1513 treat_control_like_bulk:
1514 ep->last_io = jiffies;
Alan Stern4d2f1102007-08-24 15:40:10 -04001515 total = transfer(dum, urb, ep, limit, &status);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001516 break;
1517 }
1518
1519 /* incomplete transfer? */
Alan Stern4d2f1102007-08-24 15:40:10 -04001520 if (status == -EINPROGRESS)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001521 continue;
1522
1523return_urb:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001524 list_del (&urbp->urbp_list);
1525 kfree (urbp);
1526 if (ep)
1527 ep->already_seen = ep->setup_stage = 0;
1528
Alan Sterne9df41c2007-08-08 11:48:02 -04001529 usb_hcd_unlink_urb_from_ep(dummy_to_hcd(dum), urb);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001530 spin_unlock (&dum->lock);
Alan Stern4a000272007-08-24 15:42:24 -04001531 usb_hcd_giveback_urb(dummy_to_hcd(dum), urb, status);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001532 spin_lock (&dum->lock);
1533
1534 goto restart;
1535 }
1536
Alan Stern391eca92005-05-10 15:34:16 -04001537 if (list_empty (&dum->urbp_list)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001538 usb_put_dev (dum->udev);
1539 dum->udev = NULL;
Alan Stern391eca92005-05-10 15:34:16 -04001540 } else if (dum->rh_state == DUMMY_RH_RUNNING) {
1541 /* want a 1 msec delay here */
1542 mod_timer (&dum->timer, jiffies + msecs_to_jiffies(1));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001543 }
1544
1545 spin_unlock_irqrestore (&dum->lock, flags);
1546}
1547
1548/*-------------------------------------------------------------------------*/
1549
1550#define PORT_C_MASK \
Alan Sternc2db8b52005-04-29 16:30:48 -04001551 ((USB_PORT_STAT_C_CONNECTION \
1552 | USB_PORT_STAT_C_ENABLE \
1553 | USB_PORT_STAT_C_SUSPEND \
1554 | USB_PORT_STAT_C_OVERCURRENT \
1555 | USB_PORT_STAT_C_RESET) << 16)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001556
1557static int dummy_hub_status (struct usb_hcd *hcd, char *buf)
1558{
1559 struct dummy *dum;
1560 unsigned long flags;
Alan Stern391eca92005-05-10 15:34:16 -04001561 int retval = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001562
1563 dum = hcd_to_dummy (hcd);
1564
1565 spin_lock_irqsave (&dum->lock, flags);
Alan Stern541c7d42010-06-22 16:39:10 -04001566 if (!HCD_HW_ACCESSIBLE(hcd))
Alan Stern391eca92005-05-10 15:34:16 -04001567 goto done;
Alan Sternf1c39fa2005-05-03 16:24:04 -04001568
1569 if (dum->resuming && time_after_eq (jiffies, dum->re_timeout)) {
1570 dum->port_status |= (USB_PORT_STAT_C_SUSPEND << 16);
1571 dum->port_status &= ~USB_PORT_STAT_SUSPEND;
1572 set_link_state (dum);
1573 }
1574
Alan Stern391eca92005-05-10 15:34:16 -04001575 if ((dum->port_status & PORT_C_MASK) != 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001576 *buf = (1 << 1);
1577 dev_dbg (dummy_dev(dum), "port status 0x%08x has changes\n",
Alan Stern391eca92005-05-10 15:34:16 -04001578 dum->port_status);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001579 retval = 1;
Alan Stern391eca92005-05-10 15:34:16 -04001580 if (dum->rh_state == DUMMY_RH_SUSPENDED)
1581 usb_hcd_resume_root_hub (hcd);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001582 }
Alan Stern391eca92005-05-10 15:34:16 -04001583done:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001584 spin_unlock_irqrestore (&dum->lock, flags);
1585 return retval;
1586}
1587
1588static inline void
1589hub_descriptor (struct usb_hub_descriptor *desc)
1590{
1591 memset (desc, 0, sizeof *desc);
1592 desc->bDescriptorType = 0x29;
1593 desc->bDescLength = 9;
Al Virofd05e722008-04-28 07:00:16 +01001594 desc->wHubCharacteristics = cpu_to_le16(0x0001);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001595 desc->bNbrPorts = 1;
1596 desc->bitmap [0] = 0xff;
1597 desc->bitmap [1] = 0xff;
1598}
1599
1600static int dummy_hub_control (
1601 struct usb_hcd *hcd,
1602 u16 typeReq,
1603 u16 wValue,
1604 u16 wIndex,
1605 char *buf,
1606 u16 wLength
1607) {
1608 struct dummy *dum;
1609 int retval = 0;
1610 unsigned long flags;
1611
Alan Stern541c7d42010-06-22 16:39:10 -04001612 if (!HCD_HW_ACCESSIBLE(hcd))
Alan Stern391eca92005-05-10 15:34:16 -04001613 return -ETIMEDOUT;
1614
Linus Torvalds1da177e2005-04-16 15:20:36 -07001615 dum = hcd_to_dummy (hcd);
1616 spin_lock_irqsave (&dum->lock, flags);
1617 switch (typeReq) {
1618 case ClearHubFeature:
1619 break;
1620 case ClearPortFeature:
1621 switch (wValue) {
1622 case USB_PORT_FEAT_SUSPEND:
Alan Sternc2db8b52005-04-29 16:30:48 -04001623 if (dum->port_status & USB_PORT_STAT_SUSPEND) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001624 /* 20msec resume signaling */
1625 dum->resuming = 1;
1626 dum->re_timeout = jiffies +
Alan Sternf1c39fa2005-05-03 16:24:04 -04001627 msecs_to_jiffies(20);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001628 }
1629 break;
1630 case USB_PORT_FEAT_POWER:
Alan Sternf1c39fa2005-05-03 16:24:04 -04001631 if (dum->port_status & USB_PORT_STAT_POWER)
1632 dev_dbg (dummy_dev(dum), "power-off\n");
1633 /* FALLS THROUGH */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001634 default:
1635 dum->port_status &= ~(1 << wValue);
Alan Sternf1c39fa2005-05-03 16:24:04 -04001636 set_link_state (dum);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001637 }
1638 break;
1639 case GetHubDescriptor:
1640 hub_descriptor ((struct usb_hub_descriptor *) buf);
1641 break;
1642 case GetHubStatus:
Harvey Harrison551509d2009-02-11 14:11:36 -08001643 *(__le32 *) buf = cpu_to_le32 (0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001644 break;
1645 case GetPortStatus:
1646 if (wIndex != 1)
1647 retval = -EPIPE;
1648
1649 /* whoever resets or resumes must GetPortStatus to
1650 * complete it!!
1651 */
Alan Sternf1c39fa2005-05-03 16:24:04 -04001652 if (dum->resuming &&
1653 time_after_eq (jiffies, dum->re_timeout)) {
Alan Sternc2db8b52005-04-29 16:30:48 -04001654 dum->port_status |= (USB_PORT_STAT_C_SUSPEND << 16);
1655 dum->port_status &= ~USB_PORT_STAT_SUSPEND;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001656 }
Alan Sternf1c39fa2005-05-03 16:24:04 -04001657 if ((dum->port_status & USB_PORT_STAT_RESET) != 0 &&
1658 time_after_eq (jiffies, dum->re_timeout)) {
Alan Sternc2db8b52005-04-29 16:30:48 -04001659 dum->port_status |= (USB_PORT_STAT_C_RESET << 16);
1660 dum->port_status &= ~USB_PORT_STAT_RESET;
Alan Sternf1c39fa2005-05-03 16:24:04 -04001661 if (dum->pullup) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001662 dum->port_status |= USB_PORT_STAT_ENABLE;
1663 /* give it the best speed we agree on */
1664 dum->gadget.speed = dum->driver->speed;
1665 dum->gadget.ep0->maxpacket = 64;
1666 switch (dum->gadget.speed) {
1667 case USB_SPEED_HIGH:
1668 dum->port_status |=
1669 USB_PORT_STAT_HIGH_SPEED;
1670 break;
1671 case USB_SPEED_LOW:
1672 dum->gadget.ep0->maxpacket = 8;
1673 dum->port_status |=
1674 USB_PORT_STAT_LOW_SPEED;
1675 break;
1676 default:
1677 dum->gadget.speed = USB_SPEED_FULL;
1678 break;
1679 }
1680 }
1681 }
Alan Sternf1c39fa2005-05-03 16:24:04 -04001682 set_link_state (dum);
Alan Sterncc095b02005-05-10 15:28:38 -04001683 ((__le16 *) buf)[0] = cpu_to_le16 (dum->port_status);
1684 ((__le16 *) buf)[1] = cpu_to_le16 (dum->port_status >> 16);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001685 break;
1686 case SetHubFeature:
1687 retval = -EPIPE;
1688 break;
1689 case SetPortFeature:
1690 switch (wValue) {
1691 case USB_PORT_FEAT_SUSPEND:
Alan Sternf1c39fa2005-05-03 16:24:04 -04001692 if (dum->active) {
Alan Sternc2db8b52005-04-29 16:30:48 -04001693 dum->port_status |= USB_PORT_STAT_SUSPEND;
Alan Sternf1c39fa2005-05-03 16:24:04 -04001694
1695 /* HNP would happen here; for now we
1696 * assume b_bus_req is always true.
1697 */
1698 set_link_state (dum);
1699 if (((1 << USB_DEVICE_B_HNP_ENABLE)
1700 & dum->devstatus) != 0)
1701 dev_dbg (dummy_dev(dum),
Alan Stern5742b0c2005-05-02 11:25:17 -04001702 "no HNP yet!\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001703 }
1704 break;
Alan Sternf1c39fa2005-05-03 16:24:04 -04001705 case USB_PORT_FEAT_POWER:
1706 dum->port_status |= USB_PORT_STAT_POWER;
1707 set_link_state (dum);
1708 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001709 case USB_PORT_FEAT_RESET:
Alan Sternf1c39fa2005-05-03 16:24:04 -04001710 /* if it's already enabled, disable */
1711 dum->port_status &= ~(USB_PORT_STAT_ENABLE
1712 | USB_PORT_STAT_LOW_SPEED
1713 | USB_PORT_STAT_HIGH_SPEED);
Alan Stern391eca92005-05-10 15:34:16 -04001714 dum->devstatus = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001715 /* 50msec reset signaling */
1716 dum->re_timeout = jiffies + msecs_to_jiffies(50);
Alan Sternf1c39fa2005-05-03 16:24:04 -04001717 /* FALLS THROUGH */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001718 default:
Alan Sternf1c39fa2005-05-03 16:24:04 -04001719 if ((dum->port_status & USB_PORT_STAT_POWER) != 0) {
1720 dum->port_status |= (1 << wValue);
1721 set_link_state (dum);
1722 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001723 }
1724 break;
1725
1726 default:
1727 dev_dbg (dummy_dev(dum),
1728 "hub control req%04x v%04x i%04x l%d\n",
1729 typeReq, wValue, wIndex, wLength);
1730
1731 /* "protocol stall" on error */
1732 retval = -EPIPE;
1733 }
1734 spin_unlock_irqrestore (&dum->lock, flags);
Alan Stern685eb932005-05-03 16:27:26 -04001735
1736 if ((dum->port_status & PORT_C_MASK) != 0)
1737 usb_hcd_poll_rh_status (hcd);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001738 return retval;
1739}
1740
Alan Stern0c0382e2005-10-13 17:08:02 -04001741static int dummy_bus_suspend (struct usb_hcd *hcd)
Alan Stern391eca92005-05-10 15:34:16 -04001742{
1743 struct dummy *dum = hcd_to_dummy (hcd);
1744
Harvey Harrison441b62c2008-03-03 16:08:34 -08001745 dev_dbg (&hcd->self.root_hub->dev, "%s\n", __func__);
Alan Stern3cf0a222005-11-29 12:08:15 -05001746
Alan Stern391eca92005-05-10 15:34:16 -04001747 spin_lock_irq (&dum->lock);
1748 dum->rh_state = DUMMY_RH_SUSPENDED;
1749 set_link_state (dum);
Alan Stern3cf0a222005-11-29 12:08:15 -05001750 hcd->state = HC_STATE_SUSPENDED;
Alan Stern391eca92005-05-10 15:34:16 -04001751 spin_unlock_irq (&dum->lock);
1752 return 0;
1753}
1754
Alan Stern0c0382e2005-10-13 17:08:02 -04001755static int dummy_bus_resume (struct usb_hcd *hcd)
Alan Stern391eca92005-05-10 15:34:16 -04001756{
1757 struct dummy *dum = hcd_to_dummy (hcd);
Alan Stern3cf0a222005-11-29 12:08:15 -05001758 int rc = 0;
1759
Harvey Harrison441b62c2008-03-03 16:08:34 -08001760 dev_dbg (&hcd->self.root_hub->dev, "%s\n", __func__);
Alan Stern391eca92005-05-10 15:34:16 -04001761
1762 spin_lock_irq (&dum->lock);
Alan Stern541c7d42010-06-22 16:39:10 -04001763 if (!HCD_HW_ACCESSIBLE(hcd)) {
Alan Sterncfa59da2007-06-21 16:25:35 -04001764 rc = -ESHUTDOWN;
Alan Stern3cf0a222005-11-29 12:08:15 -05001765 } else {
1766 dum->rh_state = DUMMY_RH_RUNNING;
1767 set_link_state (dum);
1768 if (!list_empty(&dum->urbp_list))
1769 mod_timer (&dum->timer, jiffies);
1770 hcd->state = HC_STATE_RUNNING;
1771 }
Alan Stern391eca92005-05-10 15:34:16 -04001772 spin_unlock_irq (&dum->lock);
Alan Stern3cf0a222005-11-29 12:08:15 -05001773 return rc;
Alan Stern391eca92005-05-10 15:34:16 -04001774}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001775
1776/*-------------------------------------------------------------------------*/
1777
1778static inline ssize_t
1779show_urb (char *buf, size_t size, struct urb *urb)
1780{
1781 int ep = usb_pipeendpoint (urb->pipe);
1782
1783 return snprintf (buf, size,
1784 "urb/%p %s ep%d%s%s len %d/%d\n",
1785 urb,
1786 ({ char *s;
1787 switch (urb->dev->speed) {
1788 case USB_SPEED_LOW: s = "ls"; break;
1789 case USB_SPEED_FULL: s = "fs"; break;
1790 case USB_SPEED_HIGH: s = "hs"; break;
1791 default: s = "?"; break;
1792 }; s; }),
1793 ep, ep ? (usb_pipein (urb->pipe) ? "in" : "out") : "",
1794 ({ char *s; \
1795 switch (usb_pipetype (urb->pipe)) { \
1796 case PIPE_CONTROL: s = ""; break; \
1797 case PIPE_BULK: s = "-bulk"; break; \
1798 case PIPE_INTERRUPT: s = "-int"; break; \
1799 default: s = "-iso"; break; \
1800 }; s;}),
1801 urb->actual_length, urb->transfer_buffer_length);
1802}
1803
1804static ssize_t
Yani Ioannou10523b32005-05-17 06:43:37 -04001805show_urbs (struct device *dev, struct device_attribute *attr, char *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001806{
1807 struct usb_hcd *hcd = dev_get_drvdata (dev);
1808 struct dummy *dum = hcd_to_dummy (hcd);
1809 struct urbp *urbp;
1810 size_t size = 0;
1811 unsigned long flags;
1812
1813 spin_lock_irqsave (&dum->lock, flags);
1814 list_for_each_entry (urbp, &dum->urbp_list, urbp_list) {
1815 size_t temp;
1816
1817 temp = show_urb (buf, PAGE_SIZE - size, urbp->urb);
1818 buf += temp;
1819 size += temp;
1820 }
1821 spin_unlock_irqrestore (&dum->lock, flags);
1822
1823 return size;
1824}
1825static DEVICE_ATTR (urbs, S_IRUGO, show_urbs, NULL);
1826
1827static int dummy_start (struct usb_hcd *hcd)
1828{
1829 struct dummy *dum;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001830
1831 dum = hcd_to_dummy (hcd);
1832
1833 /*
1834 * MASTER side init ... we emulate a root hub that'll only ever
1835 * talk to one device (the slave side). Also appears in sysfs,
1836 * just like more familiar pci-based HCDs.
1837 */
1838 spin_lock_init (&dum->lock);
1839 init_timer (&dum->timer);
1840 dum->timer.function = dummy_timer;
1841 dum->timer.data = (unsigned long) dum;
Alan Stern391eca92005-05-10 15:34:16 -04001842 dum->rh_state = DUMMY_RH_RUNNING;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001843
1844 INIT_LIST_HEAD (&dum->urbp_list);
1845
Alan Sterncaf29f62007-12-06 11:10:39 -05001846 hcd->power_budget = POWER_BUDGET;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001847 hcd->state = HC_STATE_RUNNING;
Alan Stern685eb932005-05-03 16:27:26 -04001848 hcd->uses_new_polling = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001849
Alan Stern5742b0c2005-05-02 11:25:17 -04001850#ifdef CONFIG_USB_OTG
1851 hcd->self.otg_port = 1;
1852#endif
1853
Linus Torvalds1da177e2005-04-16 15:20:36 -07001854 /* FIXME 'urbs' should be a per-device thing, maybe in usbcore */
Alan Sternefd54a32006-09-25 11:55:56 -04001855 return device_create_file (dummy_dev(dum), &dev_attr_urbs);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001856}
1857
1858static void dummy_stop (struct usb_hcd *hcd)
1859{
1860 struct dummy *dum;
1861
1862 dum = hcd_to_dummy (hcd);
1863
1864 device_remove_file (dummy_dev(dum), &dev_attr_urbs);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001865 usb_gadget_unregister_driver (dum->driver);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001866 dev_info (dummy_dev(dum), "stopped\n");
1867}
1868
1869/*-------------------------------------------------------------------------*/
1870
1871static int dummy_h_get_frame (struct usb_hcd *hcd)
1872{
1873 return dummy_g_get_frame (NULL);
1874}
1875
1876static const struct hc_driver dummy_hcd = {
1877 .description = (char *) driver_name,
1878 .product_desc = "Dummy host controller",
1879 .hcd_priv_size = sizeof(struct dummy),
1880
1881 .flags = HCD_USB2,
1882
1883 .start = dummy_start,
1884 .stop = dummy_stop,
1885
1886 .urb_enqueue = dummy_urb_enqueue,
1887 .urb_dequeue = dummy_urb_dequeue,
1888
1889 .get_frame_number = dummy_h_get_frame,
1890
1891 .hub_status_data = dummy_hub_status,
1892 .hub_control = dummy_hub_control,
Alan Stern0c0382e2005-10-13 17:08:02 -04001893 .bus_suspend = dummy_bus_suspend,
1894 .bus_resume = dummy_bus_resume,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001895};
1896
Alan Stern8364d6b2005-11-14 12:16:30 -05001897static int dummy_hcd_probe(struct platform_device *pdev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001898{
1899 struct usb_hcd *hcd;
1900 int retval;
1901
Alan Stern8364d6b2005-11-14 12:16:30 -05001902 dev_info(&pdev->dev, "%s, driver " DRIVER_VERSION "\n", driver_desc);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001903
Kay Sievers7071a3c2008-05-02 06:02:41 +02001904 hcd = usb_create_hcd(&dummy_hcd, &pdev->dev, dev_name(&pdev->dev));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001905 if (!hcd)
1906 return -ENOMEM;
1907 the_controller = hcd_to_dummy (hcd);
1908
1909 retval = usb_add_hcd(hcd, 0, 0);
1910 if (retval != 0) {
1911 usb_put_hcd (hcd);
1912 the_controller = NULL;
1913 }
1914 return retval;
1915}
1916
Alan Stern8364d6b2005-11-14 12:16:30 -05001917static int dummy_hcd_remove (struct platform_device *pdev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001918{
1919 struct usb_hcd *hcd;
1920
Alan Stern8364d6b2005-11-14 12:16:30 -05001921 hcd = platform_get_drvdata (pdev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001922 usb_remove_hcd (hcd);
1923 usb_put_hcd (hcd);
1924 the_controller = NULL;
Alan Sternd9b76252005-05-03 16:15:43 -04001925 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001926}
1927
Alan Stern8364d6b2005-11-14 12:16:30 -05001928static int dummy_hcd_suspend (struct platform_device *pdev, pm_message_t state)
Alan Stern391eca92005-05-10 15:34:16 -04001929{
1930 struct usb_hcd *hcd;
Alan Stern3cf0a222005-11-29 12:08:15 -05001931 struct dummy *dum;
1932 int rc = 0;
Alan Stern391eca92005-05-10 15:34:16 -04001933
Harvey Harrison441b62c2008-03-03 16:08:34 -08001934 dev_dbg (&pdev->dev, "%s\n", __func__);
Alan Stern391eca92005-05-10 15:34:16 -04001935
Alan Stern3cf0a222005-11-29 12:08:15 -05001936 hcd = platform_get_drvdata (pdev);
1937 dum = hcd_to_dummy (hcd);
1938 if (dum->rh_state == DUMMY_RH_RUNNING) {
1939 dev_warn(&pdev->dev, "Root hub isn't suspended!\n");
1940 rc = -EBUSY;
1941 } else
1942 clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
1943 return rc;
Alan Stern391eca92005-05-10 15:34:16 -04001944}
1945
Alan Stern8364d6b2005-11-14 12:16:30 -05001946static int dummy_hcd_resume (struct platform_device *pdev)
Alan Stern391eca92005-05-10 15:34:16 -04001947{
1948 struct usb_hcd *hcd;
1949
Harvey Harrison441b62c2008-03-03 16:08:34 -08001950 dev_dbg (&pdev->dev, "%s\n", __func__);
Alan Stern391eca92005-05-10 15:34:16 -04001951
Alan Stern3cf0a222005-11-29 12:08:15 -05001952 hcd = platform_get_drvdata (pdev);
1953 set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
Alan Stern391eca92005-05-10 15:34:16 -04001954 usb_hcd_poll_rh_status (hcd);
1955 return 0;
1956}
1957
Russell King3ae5eae2005-11-09 22:32:44 +00001958static struct platform_driver dummy_hcd_driver = {
Alan Sternd9b76252005-05-03 16:15:43 -04001959 .probe = dummy_hcd_probe,
1960 .remove = dummy_hcd_remove,
Alan Stern391eca92005-05-10 15:34:16 -04001961 .suspend = dummy_hcd_suspend,
1962 .resume = dummy_hcd_resume,
Russell King3ae5eae2005-11-09 22:32:44 +00001963 .driver = {
1964 .name = (char *) driver_name,
1965 .owner = THIS_MODULE,
1966 },
Alan Sternd9b76252005-05-03 16:15:43 -04001967};
1968
Linus Torvalds1da177e2005-04-16 15:20:36 -07001969/*-------------------------------------------------------------------------*/
1970
Alan Sterna89a2cd2008-04-07 15:03:25 -04001971static struct platform_device *the_udc_pdev;
1972static struct platform_device *the_hcd_pdev;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001973
1974static int __init init (void)
1975{
Alan Sterna89a2cd2008-04-07 15:03:25 -04001976 int retval = -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001977
1978 if (usb_disabled ())
1979 return -ENODEV;
Alan Sternd9b76252005-05-03 16:15:43 -04001980
Alan Sterna89a2cd2008-04-07 15:03:25 -04001981 the_hcd_pdev = platform_device_alloc(driver_name, -1);
1982 if (!the_hcd_pdev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001983 return retval;
Alan Sterna89a2cd2008-04-07 15:03:25 -04001984 the_udc_pdev = platform_device_alloc(gadget_name, -1);
1985 if (!the_udc_pdev)
1986 goto err_alloc_udc;
Alan Sternd9b76252005-05-03 16:15:43 -04001987
Alan Sterna89a2cd2008-04-07 15:03:25 -04001988 retval = platform_driver_register(&dummy_hcd_driver);
1989 if (retval < 0)
1990 goto err_register_hcd_driver;
1991 retval = platform_driver_register(&dummy_udc_driver);
Alan Sternd9b76252005-05-03 16:15:43 -04001992 if (retval < 0)
1993 goto err_register_udc_driver;
1994
Alan Sterna89a2cd2008-04-07 15:03:25 -04001995 retval = platform_device_add(the_hcd_pdev);
Alan Sternd9b76252005-05-03 16:15:43 -04001996 if (retval < 0)
Alan Sterna89a2cd2008-04-07 15:03:25 -04001997 goto err_add_hcd;
1998 retval = platform_device_add(the_udc_pdev);
Alan Sternd9b76252005-05-03 16:15:43 -04001999 if (retval < 0)
Alan Sterna89a2cd2008-04-07 15:03:25 -04002000 goto err_add_udc;
Alan Sternd9b76252005-05-03 16:15:43 -04002001 return retval;
2002
Alan Sterna89a2cd2008-04-07 15:03:25 -04002003err_add_udc:
2004 platform_device_del(the_hcd_pdev);
2005err_add_hcd:
2006 platform_driver_unregister(&dummy_udc_driver);
Alan Sternd9b76252005-05-03 16:15:43 -04002007err_register_udc_driver:
Alan Sterna89a2cd2008-04-07 15:03:25 -04002008 platform_driver_unregister(&dummy_hcd_driver);
2009err_register_hcd_driver:
2010 platform_device_put(the_udc_pdev);
2011err_alloc_udc:
2012 platform_device_put(the_hcd_pdev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002013 return retval;
2014}
2015module_init (init);
2016
2017static void __exit cleanup (void)
2018{
Alan Sterna89a2cd2008-04-07 15:03:25 -04002019 platform_device_unregister(the_udc_pdev);
2020 platform_device_unregister(the_hcd_pdev);
2021 platform_driver_unregister(&dummy_udc_driver);
2022 platform_driver_unregister(&dummy_hcd_driver);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002023}
2024module_exit (cleanup);