blob: 9064696636acad99b03453a9126ea1b77f539b47 [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>
Linus Torvalds1da177e2005-04-16 15:20:36 -070050
51#include <asm/byteorder.h>
52#include <asm/io.h>
53#include <asm/irq.h>
54#include <asm/system.h>
55#include <asm/unaligned.h>
56
57
58#include "../core/hcd.h"
59
60
61#define DRIVER_DESC "USB Host+Gadget Emulator"
Alan Stern391eca92005-05-10 15:34:16 -040062#define DRIVER_VERSION "02 May 2005"
Linus Torvalds1da177e2005-04-16 15:20:36 -070063
Alan Sterncaf29f62007-12-06 11:10:39 -050064#define POWER_BUDGET 500 /* in mA; use 8 for low-power port testing */
65
Linus Torvalds1da177e2005-04-16 15:20:36 -070066static const char driver_name [] = "dummy_hcd";
67static const char driver_desc [] = "USB Host+Gadget Emulator";
68
69static const char gadget_name [] = "dummy_udc";
70
71MODULE_DESCRIPTION (DRIVER_DESC);
72MODULE_AUTHOR ("David Brownell");
73MODULE_LICENSE ("GPL");
74
75/*-------------------------------------------------------------------------*/
76
77/* gadget side driver data structres */
78struct dummy_ep {
79 struct list_head queue;
80 unsigned long last_io; /* jiffies timestamp */
81 struct usb_gadget *gadget;
82 const struct usb_endpoint_descriptor *desc;
83 struct usb_ep ep;
84 unsigned halted : 1;
Alan Stern851a5262008-08-14 15:48:30 -040085 unsigned wedged : 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -070086 unsigned already_seen : 1;
87 unsigned setup_stage : 1;
88};
89
90struct dummy_request {
91 struct list_head queue; /* ep's requests */
92 struct usb_request req;
93};
94
95static inline struct dummy_ep *usb_ep_to_dummy_ep (struct usb_ep *_ep)
96{
97 return container_of (_ep, struct dummy_ep, ep);
98}
99
100static inline struct dummy_request *usb_request_to_dummy_request
101 (struct usb_request *_req)
102{
103 return container_of (_req, struct dummy_request, req);
104}
105
106/*-------------------------------------------------------------------------*/
107
108/*
109 * Every device has ep0 for control requests, plus up to 30 more endpoints,
110 * in one of two types:
111 *
112 * - Configurable: direction (in/out), type (bulk, iso, etc), and endpoint
113 * number can be changed. Names like "ep-a" are used for this type.
114 *
115 * - Fixed Function: in other cases. some characteristics may be mutable;
116 * that'd be hardware-specific. Names like "ep12out-bulk" are used.
117 *
118 * Gadget drivers are responsible for not setting up conflicting endpoint
119 * configurations, illegal or unsupported packet lengths, and so on.
120 */
121
122static const char ep0name [] = "ep0";
123
124static const char *const ep_name [] = {
125 ep0name, /* everyone has ep0 */
126
127 /* act like a net2280: high speed, six configurable endpoints */
128 "ep-a", "ep-b", "ep-c", "ep-d", "ep-e", "ep-f",
129
130 /* or like pxa250: fifteen fixed function endpoints */
131 "ep1in-bulk", "ep2out-bulk", "ep3in-iso", "ep4out-iso", "ep5in-int",
132 "ep6in-bulk", "ep7out-bulk", "ep8in-iso", "ep9out-iso", "ep10in-int",
133 "ep11in-bulk", "ep12out-bulk", "ep13in-iso", "ep14out-iso",
134 "ep15in-int",
135
136 /* or like sa1100: two fixed function endpoints */
137 "ep1out-bulk", "ep2in-bulk",
138};
Tobias Klauser52950ed2005-12-11 16:20:08 +0100139#define DUMMY_ENDPOINTS ARRAY_SIZE(ep_name)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700140
Alan Sternd9b76252005-05-03 16:15:43 -0400141/*-------------------------------------------------------------------------*/
142
Linus Torvalds1da177e2005-04-16 15:20:36 -0700143#define FIFO_SIZE 64
144
145struct urbp {
146 struct urb *urb;
147 struct list_head urbp_list;
148};
149
Alan Stern391eca92005-05-10 15:34:16 -0400150
151enum dummy_rh_state {
152 DUMMY_RH_RESET,
153 DUMMY_RH_SUSPENDED,
154 DUMMY_RH_RUNNING
155};
156
Linus Torvalds1da177e2005-04-16 15:20:36 -0700157struct dummy {
158 spinlock_t lock;
159
160 /*
161 * SLAVE/GADGET side support
162 */
163 struct dummy_ep ep [DUMMY_ENDPOINTS];
164 int address;
165 struct usb_gadget gadget;
166 struct usb_gadget_driver *driver;
167 struct dummy_request fifo_req;
168 u8 fifo_buf [FIFO_SIZE];
169 u16 devstatus;
Alan Stern391eca92005-05-10 15:34:16 -0400170 unsigned udc_suspended:1;
Alan Sternf1c39fa2005-05-03 16:24:04 -0400171 unsigned pullup:1;
172 unsigned active:1;
173 unsigned old_active:1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700174
175 /*
176 * MASTER/HOST side support
177 */
Alan Stern391eca92005-05-10 15:34:16 -0400178 enum dummy_rh_state rh_state;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700179 struct timer_list timer;
180 u32 port_status;
Alan Sternf1c39fa2005-05-03 16:24:04 -0400181 u32 old_status;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700182 unsigned resuming:1;
183 unsigned long re_timeout;
184
185 struct usb_device *udev;
186 struct list_head urbp_list;
187};
188
189static inline struct dummy *hcd_to_dummy (struct usb_hcd *hcd)
190{
191 return (struct dummy *) (hcd->hcd_priv);
192}
193
194static inline struct usb_hcd *dummy_to_hcd (struct dummy *dum)
195{
196 return container_of((void *) dum, struct usb_hcd, hcd_priv);
197}
198
199static inline struct device *dummy_dev (struct dummy *dum)
200{
201 return dummy_to_hcd(dum)->self.controller;
202}
203
Alan Sternd9b76252005-05-03 16:15:43 -0400204static inline struct device *udc_dev (struct dummy *dum)
205{
206 return dum->gadget.dev.parent;
207}
208
Linus Torvalds1da177e2005-04-16 15:20:36 -0700209static inline struct dummy *ep_to_dummy (struct dummy_ep *ep)
210{
211 return container_of (ep->gadget, struct dummy, gadget);
212}
213
214static inline struct dummy *gadget_to_dummy (struct usb_gadget *gadget)
215{
216 return container_of (gadget, struct dummy, gadget);
217}
218
219static inline struct dummy *gadget_dev_to_dummy (struct device *dev)
220{
221 return container_of (dev, struct dummy, gadget.dev);
222}
223
224static struct dummy *the_controller;
225
226/*-------------------------------------------------------------------------*/
227
Alan Sternf1c39fa2005-05-03 16:24:04 -0400228/* SLAVE/GADGET SIDE UTILITY ROUTINES */
229
230/* called with spinlock held */
231static void nuke (struct dummy *dum, struct dummy_ep *ep)
232{
233 while (!list_empty (&ep->queue)) {
234 struct dummy_request *req;
235
236 req = list_entry (ep->queue.next, struct dummy_request, queue);
237 list_del_init (&req->queue);
238 req->req.status = -ESHUTDOWN;
239
240 spin_unlock (&dum->lock);
241 req->req.complete (&ep->ep, &req->req);
242 spin_lock (&dum->lock);
243 }
244}
245
246/* caller must hold lock */
247static void
248stop_activity (struct dummy *dum)
249{
250 struct dummy_ep *ep;
251
252 /* prevent any more requests */
253 dum->address = 0;
254
255 /* The timer is left running so that outstanding URBs can fail */
256
257 /* nuke any pending requests first, so driver i/o is quiesced */
258 list_for_each_entry (ep, &dum->gadget.ep_list, ep.ep_list)
259 nuke (dum, ep);
260
261 /* driver now does any non-usb quiescing necessary */
262}
263
264/* caller must hold lock */
265static void
266set_link_state (struct dummy *dum)
267{
268 dum->active = 0;
269 if ((dum->port_status & USB_PORT_STAT_POWER) == 0)
270 dum->port_status = 0;
Alan Stern391eca92005-05-10 15:34:16 -0400271
272 /* UDC suspend must cause a disconnect */
273 else if (!dum->pullup || dum->udc_suspended) {
Alan Sternf1c39fa2005-05-03 16:24:04 -0400274 dum->port_status &= ~(USB_PORT_STAT_CONNECTION |
275 USB_PORT_STAT_ENABLE |
276 USB_PORT_STAT_LOW_SPEED |
277 USB_PORT_STAT_HIGH_SPEED |
278 USB_PORT_STAT_SUSPEND);
279 if ((dum->old_status & USB_PORT_STAT_CONNECTION) != 0)
280 dum->port_status |= (USB_PORT_STAT_C_CONNECTION << 16);
281 } else {
282 dum->port_status |= USB_PORT_STAT_CONNECTION;
283 if ((dum->old_status & USB_PORT_STAT_CONNECTION) == 0)
284 dum->port_status |= (USB_PORT_STAT_C_CONNECTION << 16);
285 if ((dum->port_status & USB_PORT_STAT_ENABLE) == 0)
286 dum->port_status &= ~USB_PORT_STAT_SUSPEND;
Alan Stern391eca92005-05-10 15:34:16 -0400287 else if ((dum->port_status & USB_PORT_STAT_SUSPEND) == 0 &&
288 dum->rh_state != DUMMY_RH_SUSPENDED)
Alan Sternf1c39fa2005-05-03 16:24:04 -0400289 dum->active = 1;
290 }
291
292 if ((dum->port_status & USB_PORT_STAT_ENABLE) == 0 || dum->active)
293 dum->resuming = 0;
294
295 if ((dum->port_status & USB_PORT_STAT_CONNECTION) == 0 ||
296 (dum->port_status & USB_PORT_STAT_RESET) != 0) {
297 if ((dum->old_status & USB_PORT_STAT_CONNECTION) != 0 &&
298 (dum->old_status & USB_PORT_STAT_RESET) == 0 &&
299 dum->driver) {
300 stop_activity (dum);
301 spin_unlock (&dum->lock);
302 dum->driver->disconnect (&dum->gadget);
303 spin_lock (&dum->lock);
304 }
305 } else if (dum->active != dum->old_active) {
306 if (dum->old_active && dum->driver->suspend) {
307 spin_unlock (&dum->lock);
308 dum->driver->suspend (&dum->gadget);
309 spin_lock (&dum->lock);
310 } else if (!dum->old_active && dum->driver->resume) {
311 spin_unlock (&dum->lock);
312 dum->driver->resume (&dum->gadget);
313 spin_lock (&dum->lock);
314 }
315 }
316
317 dum->old_status = dum->port_status;
318 dum->old_active = dum->active;
319}
320
321/*-------------------------------------------------------------------------*/
322
Linus Torvalds1da177e2005-04-16 15:20:36 -0700323/* SLAVE/GADGET SIDE DRIVER
324 *
325 * This only tracks gadget state. All the work is done when the host
326 * side tries some (emulated) i/o operation. Real device controller
327 * drivers would do real i/o using dma, fifos, irqs, timers, etc.
328 */
329
330#define is_enabled(dum) \
331 (dum->port_status & USB_PORT_STAT_ENABLE)
332
333static int
334dummy_enable (struct usb_ep *_ep, const struct usb_endpoint_descriptor *desc)
335{
336 struct dummy *dum;
337 struct dummy_ep *ep;
338 unsigned max;
339 int retval;
340
341 ep = usb_ep_to_dummy_ep (_ep);
342 if (!_ep || !desc || ep->desc || _ep->name == ep0name
343 || desc->bDescriptorType != USB_DT_ENDPOINT)
344 return -EINVAL;
345 dum = ep_to_dummy (ep);
346 if (!dum->driver || !is_enabled (dum))
347 return -ESHUTDOWN;
348 max = le16_to_cpu(desc->wMaxPacketSize) & 0x3ff;
349
350 /* drivers must not request bad settings, since lower levels
351 * (hardware or its drivers) may not check. some endpoints
352 * can't do iso, many have maxpacket limitations, etc.
353 *
354 * since this "hardware" driver is here to help debugging, we
355 * have some extra sanity checks. (there could be more though,
356 * especially for "ep9out" style fixed function ones.)
357 */
358 retval = -EINVAL;
359 switch (desc->bmAttributes & 0x03) {
360 case USB_ENDPOINT_XFER_BULK:
361 if (strstr (ep->ep.name, "-iso")
362 || strstr (ep->ep.name, "-int")) {
363 goto done;
364 }
365 switch (dum->gadget.speed) {
366 case USB_SPEED_HIGH:
367 if (max == 512)
368 break;
Ingo van Lil9063ff42008-03-28 14:50:26 -0700369 goto done;
370 case USB_SPEED_FULL:
371 if (max == 8 || max == 16 || max == 32 || max == 64)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700372 /* we'll fake any legal size */
373 break;
Ingo van Lil9063ff42008-03-28 14:50:26 -0700374 /* save a return statement */
375 default:
376 goto done;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700377 }
378 break;
379 case USB_ENDPOINT_XFER_INT:
380 if (strstr (ep->ep.name, "-iso")) /* bulk is ok */
381 goto done;
382 /* real hardware might not handle all packet sizes */
383 switch (dum->gadget.speed) {
384 case USB_SPEED_HIGH:
385 if (max <= 1024)
386 break;
387 /* save a return statement */
388 case USB_SPEED_FULL:
389 if (max <= 64)
390 break;
391 /* save a return statement */
392 default:
393 if (max <= 8)
394 break;
395 goto done;
396 }
397 break;
398 case USB_ENDPOINT_XFER_ISOC:
399 if (strstr (ep->ep.name, "-bulk")
400 || strstr (ep->ep.name, "-int"))
401 goto done;
402 /* real hardware might not handle all packet sizes */
403 switch (dum->gadget.speed) {
404 case USB_SPEED_HIGH:
405 if (max <= 1024)
406 break;
407 /* save a return statement */
408 case USB_SPEED_FULL:
409 if (max <= 1023)
410 break;
411 /* save a return statement */
412 default:
413 goto done;
414 }
415 break;
416 default:
417 /* few chips support control except on ep0 */
418 goto done;
419 }
420
421 _ep->maxpacket = max;
422 ep->desc = desc;
423
Alan Sternd9b76252005-05-03 16:15:43 -0400424 dev_dbg (udc_dev(dum), "enabled %s (ep%d%s-%s) maxpacket %d\n",
Linus Torvalds1da177e2005-04-16 15:20:36 -0700425 _ep->name,
426 desc->bEndpointAddress & 0x0f,
427 (desc->bEndpointAddress & USB_DIR_IN) ? "in" : "out",
428 ({ char *val;
429 switch (desc->bmAttributes & 0x03) {
430 case USB_ENDPOINT_XFER_BULK: val = "bulk"; break;
431 case USB_ENDPOINT_XFER_ISOC: val = "iso"; break;
432 case USB_ENDPOINT_XFER_INT: val = "intr"; break;
433 default: val = "ctrl"; break;
434 }; val; }),
435 max);
436
437 /* at this point real hardware should be NAKing transfers
438 * to that endpoint, until a buffer is queued to it.
439 */
Alan Stern851a5262008-08-14 15:48:30 -0400440 ep->halted = ep->wedged = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700441 retval = 0;
442done:
443 return retval;
444}
445
Linus Torvalds1da177e2005-04-16 15:20:36 -0700446static int dummy_disable (struct usb_ep *_ep)
447{
448 struct dummy_ep *ep;
449 struct dummy *dum;
450 unsigned long flags;
451 int retval;
452
453 ep = usb_ep_to_dummy_ep (_ep);
454 if (!_ep || !ep->desc || _ep->name == ep0name)
455 return -EINVAL;
456 dum = ep_to_dummy (ep);
457
458 spin_lock_irqsave (&dum->lock, flags);
459 ep->desc = NULL;
460 retval = 0;
461 nuke (dum, ep);
462 spin_unlock_irqrestore (&dum->lock, flags);
463
Alan Sternd9b76252005-05-03 16:15:43 -0400464 dev_dbg (udc_dev(dum), "disabled %s\n", _ep->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700465 return retval;
466}
467
468static struct usb_request *
Al Viro55016f12005-10-21 03:21:58 -0400469dummy_alloc_request (struct usb_ep *_ep, gfp_t mem_flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700470{
471 struct dummy_ep *ep;
472 struct dummy_request *req;
473
474 if (!_ep)
475 return NULL;
476 ep = usb_ep_to_dummy_ep (_ep);
477
Eric Sesterhenn7039f422006-02-27 13:34:10 -0800478 req = kzalloc(sizeof(*req), mem_flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700479 if (!req)
480 return NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700481 INIT_LIST_HEAD (&req->queue);
482 return &req->req;
483}
484
485static void
486dummy_free_request (struct usb_ep *_ep, struct usb_request *_req)
487{
488 struct dummy_ep *ep;
489 struct dummy_request *req;
490
491 ep = usb_ep_to_dummy_ep (_ep);
492 if (!ep || !_req || (!ep->desc && _ep->name != ep0name))
493 return;
494
495 req = usb_request_to_dummy_request (_req);
496 WARN_ON (!list_empty (&req->queue));
497 kfree (req);
498}
499
Linus Torvalds1da177e2005-04-16 15:20:36 -0700500static void
501fifo_complete (struct usb_ep *ep, struct usb_request *req)
502{
503}
504
505static int
Olav Kongas5db539e2005-06-23 20:25:36 +0300506dummy_queue (struct usb_ep *_ep, struct usb_request *_req,
Al Viro55016f12005-10-21 03:21:58 -0400507 gfp_t mem_flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700508{
509 struct dummy_ep *ep;
510 struct dummy_request *req;
511 struct dummy *dum;
512 unsigned long flags;
513
514 req = usb_request_to_dummy_request (_req);
515 if (!_req || !list_empty (&req->queue) || !_req->complete)
516 return -EINVAL;
517
518 ep = usb_ep_to_dummy_ep (_ep);
519 if (!_ep || (!ep->desc && _ep->name != ep0name))
520 return -EINVAL;
521
522 dum = ep_to_dummy (ep);
523 if (!dum->driver || !is_enabled (dum))
524 return -ESHUTDOWN;
525
526#if 0
Alan Sternd9b76252005-05-03 16:15:43 -0400527 dev_dbg (udc_dev(dum), "ep %p queue req %p to %s, len %d buf %p\n",
Linus Torvalds1da177e2005-04-16 15:20:36 -0700528 ep, _req, _ep->name, _req->length, _req->buf);
529#endif
530
531 _req->status = -EINPROGRESS;
532 _req->actual = 0;
533 spin_lock_irqsave (&dum->lock, flags);
534
535 /* implement an emulated single-request FIFO */
536 if (ep->desc && (ep->desc->bEndpointAddress & USB_DIR_IN) &&
537 list_empty (&dum->fifo_req.queue) &&
538 list_empty (&ep->queue) &&
539 _req->length <= FIFO_SIZE) {
540 req = &dum->fifo_req;
541 req->req = *_req;
542 req->req.buf = dum->fifo_buf;
543 memcpy (dum->fifo_buf, _req->buf, _req->length);
544 req->req.context = dum;
545 req->req.complete = fifo_complete;
546
David Brownellc728df72008-07-26 08:06:24 -0700547 list_add_tail(&req->queue, &ep->queue);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700548 spin_unlock (&dum->lock);
549 _req->actual = _req->length;
550 _req->status = 0;
551 _req->complete (_ep, _req);
552 spin_lock (&dum->lock);
David Brownellc728df72008-07-26 08:06:24 -0700553 } else
554 list_add_tail(&req->queue, &ep->queue);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700555 spin_unlock_irqrestore (&dum->lock, flags);
556
557 /* real hardware would likely enable transfers here, in case
558 * it'd been left NAKing.
559 */
560 return 0;
561}
562
563static int dummy_dequeue (struct usb_ep *_ep, struct usb_request *_req)
564{
565 struct dummy_ep *ep;
566 struct dummy *dum;
567 int retval = -EINVAL;
568 unsigned long flags;
569 struct dummy_request *req = NULL;
570
571 if (!_ep || !_req)
572 return retval;
573 ep = usb_ep_to_dummy_ep (_ep);
574 dum = ep_to_dummy (ep);
575
576 if (!dum->driver)
577 return -ESHUTDOWN;
578
Alan Sternb4dbda12006-07-28 17:07:34 -0400579 local_irq_save (flags);
580 spin_lock (&dum->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700581 list_for_each_entry (req, &ep->queue, queue) {
582 if (&req->req == _req) {
583 list_del_init (&req->queue);
584 _req->status = -ECONNRESET;
585 retval = 0;
586 break;
587 }
588 }
Alan Sternb4dbda12006-07-28 17:07:34 -0400589 spin_unlock (&dum->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700590
591 if (retval == 0) {
Alan Sternd9b76252005-05-03 16:15:43 -0400592 dev_dbg (udc_dev(dum),
Linus Torvalds1da177e2005-04-16 15:20:36 -0700593 "dequeued req %p from %s, len %d buf %p\n",
594 req, _ep->name, _req->length, _req->buf);
595 _req->complete (_ep, _req);
596 }
Alan Sternb4dbda12006-07-28 17:07:34 -0400597 local_irq_restore (flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700598 return retval;
599}
600
601static int
Alan Stern851a5262008-08-14 15:48:30 -0400602dummy_set_halt_and_wedge(struct usb_ep *_ep, int value, int wedged)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700603{
604 struct dummy_ep *ep;
605 struct dummy *dum;
606
607 if (!_ep)
608 return -EINVAL;
609 ep = usb_ep_to_dummy_ep (_ep);
610 dum = ep_to_dummy (ep);
611 if (!dum->driver)
612 return -ESHUTDOWN;
613 if (!value)
Alan Stern851a5262008-08-14 15:48:30 -0400614 ep->halted = ep->wedged = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700615 else if (ep->desc && (ep->desc->bEndpointAddress & USB_DIR_IN) &&
616 !list_empty (&ep->queue))
617 return -EAGAIN;
Alan Stern851a5262008-08-14 15:48:30 -0400618 else {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700619 ep->halted = 1;
Alan Stern851a5262008-08-14 15:48:30 -0400620 if (wedged)
621 ep->wedged = 1;
622 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700623 /* FIXME clear emulated data toggle too */
624 return 0;
625}
626
Alan Stern851a5262008-08-14 15:48:30 -0400627static int
628dummy_set_halt(struct usb_ep *_ep, int value)
629{
630 return dummy_set_halt_and_wedge(_ep, value, 0);
631}
632
633static int dummy_set_wedge(struct usb_ep *_ep)
634{
635 if (!_ep || _ep->name == ep0name)
636 return -EINVAL;
637 return dummy_set_halt_and_wedge(_ep, 1, 1);
638}
639
Linus Torvalds1da177e2005-04-16 15:20:36 -0700640static const struct usb_ep_ops dummy_ep_ops = {
641 .enable = dummy_enable,
642 .disable = dummy_disable,
643
644 .alloc_request = dummy_alloc_request,
645 .free_request = dummy_free_request,
646
Linus Torvalds1da177e2005-04-16 15:20:36 -0700647 .queue = dummy_queue,
648 .dequeue = dummy_dequeue,
649
650 .set_halt = dummy_set_halt,
Alan Stern851a5262008-08-14 15:48:30 -0400651 .set_wedge = dummy_set_wedge,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700652};
653
654/*-------------------------------------------------------------------------*/
655
656/* there are both host and device side versions of this call ... */
657static int dummy_g_get_frame (struct usb_gadget *_gadget)
658{
659 struct timeval tv;
660
661 do_gettimeofday (&tv);
662 return tv.tv_usec / 1000;
663}
664
665static int dummy_wakeup (struct usb_gadget *_gadget)
666{
667 struct dummy *dum;
668
669 dum = gadget_to_dummy (_gadget);
Alan Stern391eca92005-05-10 15:34:16 -0400670 if (!(dum->devstatus & ( (1 << USB_DEVICE_B_HNP_ENABLE)
Alan Stern5742b0c2005-05-02 11:25:17 -0400671 | (1 << USB_DEVICE_REMOTE_WAKEUP))))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700672 return -EINVAL;
Alan Stern391eca92005-05-10 15:34:16 -0400673 if ((dum->port_status & USB_PORT_STAT_CONNECTION) == 0)
674 return -ENOLINK;
675 if ((dum->port_status & USB_PORT_STAT_SUSPEND) == 0 &&
676 dum->rh_state != DUMMY_RH_SUSPENDED)
677 return -EIO;
678
679 /* FIXME: What if the root hub is suspended but the port isn't? */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700680
681 /* hub notices our request, issues downstream resume, etc */
682 dum->resuming = 1;
Alan Sternf1c39fa2005-05-03 16:24:04 -0400683 dum->re_timeout = jiffies + msecs_to_jiffies(20);
Alan Stern685eb932005-05-03 16:27:26 -0400684 mod_timer (&dummy_to_hcd (dum)->rh_timer, dum->re_timeout);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700685 return 0;
686}
687
688static int dummy_set_selfpowered (struct usb_gadget *_gadget, int value)
689{
690 struct dummy *dum;
691
692 dum = gadget_to_dummy (_gadget);
693 if (value)
694 dum->devstatus |= (1 << USB_DEVICE_SELF_POWERED);
695 else
696 dum->devstatus &= ~(1 << USB_DEVICE_SELF_POWERED);
697 return 0;
698}
699
Alan Sternf1c39fa2005-05-03 16:24:04 -0400700static int dummy_pullup (struct usb_gadget *_gadget, int value)
701{
702 struct dummy *dum;
703 unsigned long flags;
704
705 dum = gadget_to_dummy (_gadget);
706 spin_lock_irqsave (&dum->lock, flags);
707 dum->pullup = (value != 0);
708 set_link_state (dum);
709 spin_unlock_irqrestore (&dum->lock, flags);
Alan Stern685eb932005-05-03 16:27:26 -0400710
711 usb_hcd_poll_rh_status (dummy_to_hcd (dum));
Alan Sternf1c39fa2005-05-03 16:24:04 -0400712 return 0;
713}
714
Linus Torvalds1da177e2005-04-16 15:20:36 -0700715static const struct usb_gadget_ops dummy_ops = {
716 .get_frame = dummy_g_get_frame,
717 .wakeup = dummy_wakeup,
718 .set_selfpowered = dummy_set_selfpowered,
Alan Sternf1c39fa2005-05-03 16:24:04 -0400719 .pullup = dummy_pullup,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700720};
721
722/*-------------------------------------------------------------------------*/
723
724/* "function" sysfs attribute */
725static ssize_t
Yani Ioannou10523b32005-05-17 06:43:37 -0400726show_function (struct device *dev, struct device_attribute *attr, char *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700727{
728 struct dummy *dum = gadget_dev_to_dummy (dev);
729
730 if (!dum->driver || !dum->driver->function)
731 return 0;
732 return scnprintf (buf, PAGE_SIZE, "%s\n", dum->driver->function);
733}
Alan Sterncc095b02005-05-10 15:28:38 -0400734static DEVICE_ATTR (function, S_IRUGO, show_function, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700735
736/*-------------------------------------------------------------------------*/
737
738/*
739 * Driver registration/unregistration.
740 *
741 * This is basically hardware-specific; there's usually only one real USB
742 * device (not host) controller since that's how USB devices are intended
743 * to work. So most implementations of these api calls will rely on the
744 * fact that only one driver will ever bind to the hardware. But curious
745 * hardware can be built with discrete components, so the gadget API doesn't
746 * require that assumption.
747 *
748 * For this emulator, it might be convenient to create a usb slave device
749 * for each driver that registers: just add to a big root hub.
750 */
751
Linus Torvalds1da177e2005-04-16 15:20:36 -0700752int
753usb_gadget_register_driver (struct usb_gadget_driver *driver)
754{
755 struct dummy *dum = the_controller;
756 int retval, i;
757
758 if (!dum)
759 return -EINVAL;
760 if (dum->driver)
761 return -EBUSY;
David Brownell6bea4762006-12-05 03:15:33 -0800762 if (!driver->bind || !driver->setup
Linus Torvalds1da177e2005-04-16 15:20:36 -0700763 || driver->speed == USB_SPEED_UNKNOWN)
764 return -EINVAL;
765
766 /*
767 * SLAVE side init ... the layer above hardware, which
768 * can't enumerate without help from the driver we're binding.
769 */
Alan Stern5742b0c2005-05-02 11:25:17 -0400770
Linus Torvalds1da177e2005-04-16 15:20:36 -0700771 dum->devstatus = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700772
773 INIT_LIST_HEAD (&dum->gadget.ep_list);
774 for (i = 0; i < DUMMY_ENDPOINTS; i++) {
775 struct dummy_ep *ep = &dum->ep [i];
776
777 if (!ep_name [i])
778 break;
779 ep->ep.name = ep_name [i];
780 ep->ep.ops = &dummy_ep_ops;
781 list_add_tail (&ep->ep.ep_list, &dum->gadget.ep_list);
Alan Stern851a5262008-08-14 15:48:30 -0400782 ep->halted = ep->wedged = ep->already_seen =
783 ep->setup_stage = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700784 ep->ep.maxpacket = ~0;
785 ep->last_io = jiffies;
786 ep->gadget = &dum->gadget;
787 ep->desc = NULL;
788 INIT_LIST_HEAD (&ep->queue);
789 }
790
791 dum->gadget.ep0 = &dum->ep [0].ep;
792 dum->ep [0].ep.maxpacket = 64;
793 list_del_init (&dum->ep [0].ep.ep_list);
794 INIT_LIST_HEAD(&dum->fifo_req.queue);
795
Alan Stern59331012007-11-20 16:28:55 -0500796 driver->driver.bus = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700797 dum->driver = driver;
798 dum->gadget.dev.driver = &driver->driver;
Alan Sternd9b76252005-05-03 16:15:43 -0400799 dev_dbg (udc_dev(dum), "binding gadget driver '%s'\n",
Linus Torvalds1da177e2005-04-16 15:20:36 -0700800 driver->driver.name);
Alan Stern59331012007-11-20 16:28:55 -0500801 retval = driver->bind(&dum->gadget);
802 if (retval) {
803 dum->driver = NULL;
804 dum->gadget.dev.driver = NULL;
805 return retval;
806 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700807
808 /* khubd will enumerate this in a while */
Alan Sternf1c39fa2005-05-03 16:24:04 -0400809 spin_lock_irq (&dum->lock);
810 dum->pullup = 1;
811 set_link_state (dum);
812 spin_unlock_irq (&dum->lock);
Alan Stern685eb932005-05-03 16:27:26 -0400813
814 usb_hcd_poll_rh_status (dummy_to_hcd (dum));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700815 return 0;
816}
817EXPORT_SYMBOL (usb_gadget_register_driver);
818
Linus Torvalds1da177e2005-04-16 15:20:36 -0700819int
820usb_gadget_unregister_driver (struct usb_gadget_driver *driver)
821{
822 struct dummy *dum = the_controller;
823 unsigned long flags;
824
825 if (!dum)
826 return -ENODEV;
David Brownell6bea4762006-12-05 03:15:33 -0800827 if (!driver || driver != dum->driver || !driver->unbind)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700828 return -EINVAL;
829
Alan Sternd9b76252005-05-03 16:15:43 -0400830 dev_dbg (udc_dev(dum), "unregister gadget driver '%s'\n",
Linus Torvalds1da177e2005-04-16 15:20:36 -0700831 driver->driver.name);
832
833 spin_lock_irqsave (&dum->lock, flags);
Alan Sternf1c39fa2005-05-03 16:24:04 -0400834 dum->pullup = 0;
835 set_link_state (dum);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700836 spin_unlock_irqrestore (&dum->lock, flags);
837
838 driver->unbind (&dum->gadget);
Alan Stern59331012007-11-20 16:28:55 -0500839 dum->gadget.dev.driver = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700840 dum->driver = NULL;
841
Alan Sternf1c39fa2005-05-03 16:24:04 -0400842 spin_lock_irqsave (&dum->lock, flags);
843 dum->pullup = 0;
844 set_link_state (dum);
845 spin_unlock_irqrestore (&dum->lock, flags);
846
Alan Stern685eb932005-05-03 16:27:26 -0400847 usb_hcd_poll_rh_status (dummy_to_hcd (dum));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700848 return 0;
849}
850EXPORT_SYMBOL (usb_gadget_unregister_driver);
851
852#undef is_enabled
853
Alan Sterncc095b02005-05-10 15:28:38 -0400854/* just declare this in any driver that really need it */
855extern int net2280_set_fifo_mode (struct usb_gadget *gadget, int mode);
856
Linus Torvalds1da177e2005-04-16 15:20:36 -0700857int net2280_set_fifo_mode (struct usb_gadget *gadget, int mode)
858{
859 return -ENOSYS;
860}
861EXPORT_SYMBOL (net2280_set_fifo_mode);
862
Alan Sternd9b76252005-05-03 16:15:43 -0400863
864/* The gadget structure is stored inside the hcd structure and will be
865 * released along with it. */
866static void
867dummy_gadget_release (struct device *dev)
868{
Alan Sternd9b76252005-05-03 16:15:43 -0400869 struct dummy *dum = gadget_dev_to_dummy (dev);
870
Alan Stern17200582006-08-30 11:32:52 -0400871 usb_put_hcd (dummy_to_hcd (dum));
Alan Sternd9b76252005-05-03 16:15:43 -0400872}
873
Alan Stern8364d6b2005-11-14 12:16:30 -0500874static int dummy_udc_probe (struct platform_device *pdev)
Alan Sternd9b76252005-05-03 16:15:43 -0400875{
876 struct dummy *dum = the_controller;
877 int rc;
878
879 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);
890 if (rc < 0)
891 return rc;
892
Alan Stern17200582006-08-30 11:32:52 -0400893 usb_get_hcd (dummy_to_hcd (dum));
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
1200/* drive both sides of the transfers; looks like irq handlers to
1201 * both drivers except the callbacks aren't in_irq().
1202 */
1203static void dummy_timer (unsigned long _dum)
1204{
1205 struct dummy *dum = (struct dummy *) _dum;
1206 struct urbp *urbp, *tmp;
1207 unsigned long flags;
1208 int limit, total;
1209 int i;
1210
1211 /* simplistic model for one frame's bandwidth */
1212 switch (dum->gadget.speed) {
1213 case USB_SPEED_LOW:
1214 total = 8/*bytes*/ * 12/*packets*/;
1215 break;
1216 case USB_SPEED_FULL:
1217 total = 64/*bytes*/ * 19/*packets*/;
1218 break;
1219 case USB_SPEED_HIGH:
1220 total = 512/*bytes*/ * 13/*packets*/ * 8/*uframes*/;
1221 break;
1222 default:
1223 dev_err (dummy_dev(dum), "bogus device speed\n");
1224 return;
1225 }
1226
1227 /* FIXME if HZ != 1000 this will probably misbehave ... */
1228
1229 /* look at each urb queued by the host side driver */
1230 spin_lock_irqsave (&dum->lock, flags);
1231
1232 if (!dum->udev) {
1233 dev_err (dummy_dev(dum),
1234 "timer fired with no URBs pending?\n");
1235 spin_unlock_irqrestore (&dum->lock, flags);
1236 return;
1237 }
1238
1239 for (i = 0; i < DUMMY_ENDPOINTS; i++) {
1240 if (!ep_name [i])
1241 break;
1242 dum->ep [i].already_seen = 0;
1243 }
1244
1245restart:
1246 list_for_each_entry_safe (urbp, tmp, &dum->urbp_list, urbp_list) {
1247 struct urb *urb;
1248 struct dummy_request *req;
1249 u8 address;
1250 struct dummy_ep *ep = NULL;
1251 int type;
Alan Stern4d2f1102007-08-24 15:40:10 -04001252 int status = -EINPROGRESS;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001253
1254 urb = urbp->urb;
Alan Sterneb231052007-08-21 15:40:36 -04001255 if (urb->unlinked)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001256 goto return_urb;
Alan Sterneb231052007-08-21 15:40:36 -04001257 else if (dum->rh_state != DUMMY_RH_RUNNING)
Alan Stern391eca92005-05-10 15:34:16 -04001258 continue;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001259 type = usb_pipetype (urb->pipe);
1260
1261 /* used up this frame's non-periodic bandwidth?
1262 * FIXME there's infinite bandwidth for control and
1263 * periodic transfers ... unrealistic.
1264 */
1265 if (total <= 0 && type == PIPE_BULK)
1266 continue;
1267
1268 /* find the gadget's ep for this request (if configured) */
1269 address = usb_pipeendpoint (urb->pipe);
1270 if (usb_pipein (urb->pipe))
1271 address |= USB_DIR_IN;
1272 ep = find_endpoint(dum, address);
1273 if (!ep) {
1274 /* set_configuration() disagreement */
1275 dev_dbg (dummy_dev(dum),
1276 "no ep configured for urb %p\n",
1277 urb);
Alan Stern4d2f1102007-08-24 15:40:10 -04001278 status = -EPROTO;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001279 goto return_urb;
1280 }
1281
1282 if (ep->already_seen)
1283 continue;
1284 ep->already_seen = 1;
1285 if (ep == &dum->ep [0] && urb->error_count) {
1286 ep->setup_stage = 1; /* a new urb */
1287 urb->error_count = 0;
1288 }
1289 if (ep->halted && !ep->setup_stage) {
1290 /* NOTE: must not be iso! */
1291 dev_dbg (dummy_dev(dum), "ep %s halted, urb %p\n",
1292 ep->ep.name, urb);
Alan Stern4d2f1102007-08-24 15:40:10 -04001293 status = -EPIPE;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001294 goto return_urb;
1295 }
1296 /* FIXME make sure both ends agree on maxpacket */
1297
1298 /* handle control requests */
1299 if (ep == &dum->ep [0] && ep->setup_stage) {
1300 struct usb_ctrlrequest setup;
1301 int value = 1;
1302 struct dummy_ep *ep2;
Alan Sterncc095b02005-05-10 15:28:38 -04001303 unsigned w_index;
1304 unsigned w_value;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001305
1306 setup = *(struct usb_ctrlrequest*) urb->setup_packet;
Alan Sterncc095b02005-05-10 15:28:38 -04001307 w_index = le16_to_cpu(setup.wIndex);
1308 w_value = le16_to_cpu(setup.wValue);
1309 if (le16_to_cpu(setup.wLength) !=
1310 urb->transfer_buffer_length) {
Alan Stern4d2f1102007-08-24 15:40:10 -04001311 status = -EOVERFLOW;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001312 goto return_urb;
1313 }
1314
1315 /* paranoia, in case of stale queued data */
1316 list_for_each_entry (req, &ep->queue, queue) {
1317 list_del_init (&req->queue);
1318 req->req.status = -EOVERFLOW;
Alan Sternd9b76252005-05-03 16:15:43 -04001319 dev_dbg (udc_dev(dum), "stale req = %p\n",
Linus Torvalds1da177e2005-04-16 15:20:36 -07001320 req);
1321
1322 spin_unlock (&dum->lock);
1323 req->req.complete (&ep->ep, &req->req);
1324 spin_lock (&dum->lock);
1325 ep->already_seen = 0;
1326 goto restart;
1327 }
1328
1329 /* gadget driver never sees set_address or operations
1330 * on standard feature flags. some hardware doesn't
1331 * even expose them.
1332 */
1333 ep->last_io = jiffies;
1334 ep->setup_stage = 0;
1335 ep->halted = 0;
1336 switch (setup.bRequest) {
1337 case USB_REQ_SET_ADDRESS:
1338 if (setup.bRequestType != Dev_Request)
1339 break;
Alan Sterncc095b02005-05-10 15:28:38 -04001340 dum->address = w_value;
Alan Stern4d2f1102007-08-24 15:40:10 -04001341 status = 0;
Alan Sternd9b76252005-05-03 16:15:43 -04001342 dev_dbg (udc_dev(dum), "set_address = %d\n",
Alan Sterncc095b02005-05-10 15:28:38 -04001343 w_value);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001344 value = 0;
1345 break;
1346 case USB_REQ_SET_FEATURE:
1347 if (setup.bRequestType == Dev_Request) {
1348 value = 0;
Alan Sterncc095b02005-05-10 15:28:38 -04001349 switch (w_value) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001350 case USB_DEVICE_REMOTE_WAKEUP:
1351 break;
Alan Stern5742b0c2005-05-02 11:25:17 -04001352 case USB_DEVICE_B_HNP_ENABLE:
1353 dum->gadget.b_hnp_enable = 1;
1354 break;
1355 case USB_DEVICE_A_HNP_SUPPORT:
1356 dum->gadget.a_hnp_support = 1;
1357 break;
1358 case USB_DEVICE_A_ALT_HNP_SUPPORT:
1359 dum->gadget.a_alt_hnp_support
1360 = 1;
1361 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001362 default:
1363 value = -EOPNOTSUPP;
1364 }
1365 if (value == 0) {
1366 dum->devstatus |=
Alan Sterncc095b02005-05-10 15:28:38 -04001367 (1 << w_value);
Alan Stern4d2f1102007-08-24 15:40:10 -04001368 status = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001369 }
1370
1371 } else if (setup.bRequestType == Ep_Request) {
1372 // endpoint halt
Alan Sterncc095b02005-05-10 15:28:38 -04001373 ep2 = find_endpoint (dum, w_index);
Alan Stern851a5262008-08-14 15:48:30 -04001374 if (!ep2 || ep2->ep.name == ep0name) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001375 value = -EOPNOTSUPP;
1376 break;
1377 }
1378 ep2->halted = 1;
1379 value = 0;
Alan Stern4d2f1102007-08-24 15:40:10 -04001380 status = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001381 }
1382 break;
1383 case USB_REQ_CLEAR_FEATURE:
1384 if (setup.bRequestType == Dev_Request) {
Alan Sterncc095b02005-05-10 15:28:38 -04001385 switch (w_value) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001386 case USB_DEVICE_REMOTE_WAKEUP:
1387 dum->devstatus &= ~(1 <<
1388 USB_DEVICE_REMOTE_WAKEUP);
1389 value = 0;
Alan Stern4d2f1102007-08-24 15:40:10 -04001390 status = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001391 break;
1392 default:
1393 value = -EOPNOTSUPP;
1394 break;
1395 }
1396 } else if (setup.bRequestType == Ep_Request) {
1397 // endpoint halt
Alan Sterncc095b02005-05-10 15:28:38 -04001398 ep2 = find_endpoint (dum, w_index);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001399 if (!ep2) {
1400 value = -EOPNOTSUPP;
1401 break;
1402 }
Alan Stern851a5262008-08-14 15:48:30 -04001403 if (!ep2->wedged)
1404 ep2->halted = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001405 value = 0;
Alan Stern4d2f1102007-08-24 15:40:10 -04001406 status = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001407 }
1408 break;
1409 case USB_REQ_GET_STATUS:
1410 if (setup.bRequestType == Dev_InRequest
1411 || setup.bRequestType
1412 == Intf_InRequest
1413 || setup.bRequestType
1414 == Ep_InRequest
1415 ) {
1416 char *buf;
1417
1418 // device: remote wakeup, selfpowered
1419 // interface: nothing
1420 // endpoint: halt
1421 buf = (char *)urb->transfer_buffer;
1422 if (urb->transfer_buffer_length > 0) {
1423 if (setup.bRequestType ==
1424 Ep_InRequest) {
Alan Sterncc095b02005-05-10 15:28:38 -04001425 ep2 = find_endpoint (dum, w_index);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001426 if (!ep2) {
1427 value = -EOPNOTSUPP;
1428 break;
1429 }
1430 buf [0] = ep2->halted;
1431 } else if (setup.bRequestType ==
1432 Dev_InRequest) {
1433 buf [0] = (u8)
1434 dum->devstatus;
1435 } else
1436 buf [0] = 0;
1437 }
1438 if (urb->transfer_buffer_length > 1)
1439 buf [1] = 0;
1440 urb->actual_length = min (2,
1441 urb->transfer_buffer_length);
1442 value = 0;
Alan Stern4d2f1102007-08-24 15:40:10 -04001443 status = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001444 }
1445 break;
1446 }
1447
1448 /* gadget driver handles all other requests. block
1449 * until setup() returns; no reentrancy issues etc.
1450 */
1451 if (value > 0) {
1452 spin_unlock (&dum->lock);
1453 value = dum->driver->setup (&dum->gadget,
1454 &setup);
1455 spin_lock (&dum->lock);
1456
1457 if (value >= 0) {
1458 /* no delays (max 64KB data stage) */
1459 limit = 64*1024;
1460 goto treat_control_like_bulk;
1461 }
1462 /* error, see below */
1463 }
1464
1465 if (value < 0) {
1466 if (value != -EOPNOTSUPP)
Alan Sternd9b76252005-05-03 16:15:43 -04001467 dev_dbg (udc_dev(dum),
Linus Torvalds1da177e2005-04-16 15:20:36 -07001468 "setup --> %d\n",
1469 value);
Alan Stern4d2f1102007-08-24 15:40:10 -04001470 status = -EPIPE;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001471 urb->actual_length = 0;
1472 }
1473
1474 goto return_urb;
1475 }
1476
1477 /* non-control requests */
1478 limit = total;
1479 switch (usb_pipetype (urb->pipe)) {
1480 case PIPE_ISOCHRONOUS:
1481 /* FIXME is it urb->interval since the last xfer?
1482 * use urb->iso_frame_desc[i].
1483 * complete whether or not ep has requests queued.
1484 * report random errors, to debug drivers.
1485 */
1486 limit = max (limit, periodic_bytes (dum, ep));
Alan Stern4d2f1102007-08-24 15:40:10 -04001487 status = -ENOSYS;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001488 break;
1489
1490 case PIPE_INTERRUPT:
1491 /* FIXME is it urb->interval since the last xfer?
1492 * this almost certainly polls too fast.
1493 */
1494 limit = max (limit, periodic_bytes (dum, ep));
1495 /* FALLTHROUGH */
1496
1497 // case PIPE_BULK: case PIPE_CONTROL:
1498 default:
1499 treat_control_like_bulk:
1500 ep->last_io = jiffies;
Alan Stern4d2f1102007-08-24 15:40:10 -04001501 total = transfer(dum, urb, ep, limit, &status);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001502 break;
1503 }
1504
1505 /* incomplete transfer? */
Alan Stern4d2f1102007-08-24 15:40:10 -04001506 if (status == -EINPROGRESS)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001507 continue;
1508
1509return_urb:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001510 list_del (&urbp->urbp_list);
1511 kfree (urbp);
1512 if (ep)
1513 ep->already_seen = ep->setup_stage = 0;
1514
Alan Sterne9df41c2007-08-08 11:48:02 -04001515 usb_hcd_unlink_urb_from_ep(dummy_to_hcd(dum), urb);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001516 spin_unlock (&dum->lock);
Alan Stern4a000272007-08-24 15:42:24 -04001517 usb_hcd_giveback_urb(dummy_to_hcd(dum), urb, status);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001518 spin_lock (&dum->lock);
1519
1520 goto restart;
1521 }
1522
Alan Stern391eca92005-05-10 15:34:16 -04001523 if (list_empty (&dum->urbp_list)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001524 usb_put_dev (dum->udev);
1525 dum->udev = NULL;
Alan Stern391eca92005-05-10 15:34:16 -04001526 } else if (dum->rh_state == DUMMY_RH_RUNNING) {
1527 /* want a 1 msec delay here */
1528 mod_timer (&dum->timer, jiffies + msecs_to_jiffies(1));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001529 }
1530
1531 spin_unlock_irqrestore (&dum->lock, flags);
1532}
1533
1534/*-------------------------------------------------------------------------*/
1535
1536#define PORT_C_MASK \
Alan Sternc2db8b52005-04-29 16:30:48 -04001537 ((USB_PORT_STAT_C_CONNECTION \
1538 | USB_PORT_STAT_C_ENABLE \
1539 | USB_PORT_STAT_C_SUSPEND \
1540 | USB_PORT_STAT_C_OVERCURRENT \
1541 | USB_PORT_STAT_C_RESET) << 16)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001542
1543static int dummy_hub_status (struct usb_hcd *hcd, char *buf)
1544{
1545 struct dummy *dum;
1546 unsigned long flags;
Alan Stern391eca92005-05-10 15:34:16 -04001547 int retval = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001548
1549 dum = hcd_to_dummy (hcd);
1550
1551 spin_lock_irqsave (&dum->lock, flags);
Alan Stern3cf0a222005-11-29 12:08:15 -05001552 if (!test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags))
Alan Stern391eca92005-05-10 15:34:16 -04001553 goto done;
Alan Sternf1c39fa2005-05-03 16:24:04 -04001554
1555 if (dum->resuming && time_after_eq (jiffies, dum->re_timeout)) {
1556 dum->port_status |= (USB_PORT_STAT_C_SUSPEND << 16);
1557 dum->port_status &= ~USB_PORT_STAT_SUSPEND;
1558 set_link_state (dum);
1559 }
1560
Alan Stern391eca92005-05-10 15:34:16 -04001561 if ((dum->port_status & PORT_C_MASK) != 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001562 *buf = (1 << 1);
1563 dev_dbg (dummy_dev(dum), "port status 0x%08x has changes\n",
Alan Stern391eca92005-05-10 15:34:16 -04001564 dum->port_status);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001565 retval = 1;
Alan Stern391eca92005-05-10 15:34:16 -04001566 if (dum->rh_state == DUMMY_RH_SUSPENDED)
1567 usb_hcd_resume_root_hub (hcd);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001568 }
Alan Stern391eca92005-05-10 15:34:16 -04001569done:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001570 spin_unlock_irqrestore (&dum->lock, flags);
1571 return retval;
1572}
1573
1574static inline void
1575hub_descriptor (struct usb_hub_descriptor *desc)
1576{
1577 memset (desc, 0, sizeof *desc);
1578 desc->bDescriptorType = 0x29;
1579 desc->bDescLength = 9;
Al Virofd05e722008-04-28 07:00:16 +01001580 desc->wHubCharacteristics = cpu_to_le16(0x0001);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001581 desc->bNbrPorts = 1;
1582 desc->bitmap [0] = 0xff;
1583 desc->bitmap [1] = 0xff;
1584}
1585
1586static int dummy_hub_control (
1587 struct usb_hcd *hcd,
1588 u16 typeReq,
1589 u16 wValue,
1590 u16 wIndex,
1591 char *buf,
1592 u16 wLength
1593) {
1594 struct dummy *dum;
1595 int retval = 0;
1596 unsigned long flags;
1597
Alan Stern3cf0a222005-11-29 12:08:15 -05001598 if (!test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags))
Alan Stern391eca92005-05-10 15:34:16 -04001599 return -ETIMEDOUT;
1600
Linus Torvalds1da177e2005-04-16 15:20:36 -07001601 dum = hcd_to_dummy (hcd);
1602 spin_lock_irqsave (&dum->lock, flags);
1603 switch (typeReq) {
1604 case ClearHubFeature:
1605 break;
1606 case ClearPortFeature:
1607 switch (wValue) {
1608 case USB_PORT_FEAT_SUSPEND:
Alan Sternc2db8b52005-04-29 16:30:48 -04001609 if (dum->port_status & USB_PORT_STAT_SUSPEND) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001610 /* 20msec resume signaling */
1611 dum->resuming = 1;
1612 dum->re_timeout = jiffies +
Alan Sternf1c39fa2005-05-03 16:24:04 -04001613 msecs_to_jiffies(20);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001614 }
1615 break;
1616 case USB_PORT_FEAT_POWER:
Alan Sternf1c39fa2005-05-03 16:24:04 -04001617 if (dum->port_status & USB_PORT_STAT_POWER)
1618 dev_dbg (dummy_dev(dum), "power-off\n");
1619 /* FALLS THROUGH */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001620 default:
1621 dum->port_status &= ~(1 << wValue);
Alan Sternf1c39fa2005-05-03 16:24:04 -04001622 set_link_state (dum);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001623 }
1624 break;
1625 case GetHubDescriptor:
1626 hub_descriptor ((struct usb_hub_descriptor *) buf);
1627 break;
1628 case GetHubStatus:
Alan Sterncc095b02005-05-10 15:28:38 -04001629 *(__le32 *) buf = __constant_cpu_to_le32 (0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001630 break;
1631 case GetPortStatus:
1632 if (wIndex != 1)
1633 retval = -EPIPE;
1634
1635 /* whoever resets or resumes must GetPortStatus to
1636 * complete it!!
1637 */
Alan Sternf1c39fa2005-05-03 16:24:04 -04001638 if (dum->resuming &&
1639 time_after_eq (jiffies, dum->re_timeout)) {
Alan Sternc2db8b52005-04-29 16:30:48 -04001640 dum->port_status |= (USB_PORT_STAT_C_SUSPEND << 16);
1641 dum->port_status &= ~USB_PORT_STAT_SUSPEND;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001642 }
Alan Sternf1c39fa2005-05-03 16:24:04 -04001643 if ((dum->port_status & USB_PORT_STAT_RESET) != 0 &&
1644 time_after_eq (jiffies, dum->re_timeout)) {
Alan Sternc2db8b52005-04-29 16:30:48 -04001645 dum->port_status |= (USB_PORT_STAT_C_RESET << 16);
1646 dum->port_status &= ~USB_PORT_STAT_RESET;
Alan Sternf1c39fa2005-05-03 16:24:04 -04001647 if (dum->pullup) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001648 dum->port_status |= USB_PORT_STAT_ENABLE;
1649 /* give it the best speed we agree on */
1650 dum->gadget.speed = dum->driver->speed;
1651 dum->gadget.ep0->maxpacket = 64;
1652 switch (dum->gadget.speed) {
1653 case USB_SPEED_HIGH:
1654 dum->port_status |=
1655 USB_PORT_STAT_HIGH_SPEED;
1656 break;
1657 case USB_SPEED_LOW:
1658 dum->gadget.ep0->maxpacket = 8;
1659 dum->port_status |=
1660 USB_PORT_STAT_LOW_SPEED;
1661 break;
1662 default:
1663 dum->gadget.speed = USB_SPEED_FULL;
1664 break;
1665 }
1666 }
1667 }
Alan Sternf1c39fa2005-05-03 16:24:04 -04001668 set_link_state (dum);
Alan Sterncc095b02005-05-10 15:28:38 -04001669 ((__le16 *) buf)[0] = cpu_to_le16 (dum->port_status);
1670 ((__le16 *) buf)[1] = cpu_to_le16 (dum->port_status >> 16);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001671 break;
1672 case SetHubFeature:
1673 retval = -EPIPE;
1674 break;
1675 case SetPortFeature:
1676 switch (wValue) {
1677 case USB_PORT_FEAT_SUSPEND:
Alan Sternf1c39fa2005-05-03 16:24:04 -04001678 if (dum->active) {
Alan Sternc2db8b52005-04-29 16:30:48 -04001679 dum->port_status |= USB_PORT_STAT_SUSPEND;
Alan Sternf1c39fa2005-05-03 16:24:04 -04001680
1681 /* HNP would happen here; for now we
1682 * assume b_bus_req is always true.
1683 */
1684 set_link_state (dum);
1685 if (((1 << USB_DEVICE_B_HNP_ENABLE)
1686 & dum->devstatus) != 0)
1687 dev_dbg (dummy_dev(dum),
Alan Stern5742b0c2005-05-02 11:25:17 -04001688 "no HNP yet!\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001689 }
1690 break;
Alan Sternf1c39fa2005-05-03 16:24:04 -04001691 case USB_PORT_FEAT_POWER:
1692 dum->port_status |= USB_PORT_STAT_POWER;
1693 set_link_state (dum);
1694 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001695 case USB_PORT_FEAT_RESET:
Alan Sternf1c39fa2005-05-03 16:24:04 -04001696 /* if it's already enabled, disable */
1697 dum->port_status &= ~(USB_PORT_STAT_ENABLE
1698 | USB_PORT_STAT_LOW_SPEED
1699 | USB_PORT_STAT_HIGH_SPEED);
Alan Stern391eca92005-05-10 15:34:16 -04001700 dum->devstatus = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001701 /* 50msec reset signaling */
1702 dum->re_timeout = jiffies + msecs_to_jiffies(50);
Alan Sternf1c39fa2005-05-03 16:24:04 -04001703 /* FALLS THROUGH */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001704 default:
Alan Sternf1c39fa2005-05-03 16:24:04 -04001705 if ((dum->port_status & USB_PORT_STAT_POWER) != 0) {
1706 dum->port_status |= (1 << wValue);
1707 set_link_state (dum);
1708 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001709 }
1710 break;
1711
1712 default:
1713 dev_dbg (dummy_dev(dum),
1714 "hub control req%04x v%04x i%04x l%d\n",
1715 typeReq, wValue, wIndex, wLength);
1716
1717 /* "protocol stall" on error */
1718 retval = -EPIPE;
1719 }
1720 spin_unlock_irqrestore (&dum->lock, flags);
Alan Stern685eb932005-05-03 16:27:26 -04001721
1722 if ((dum->port_status & PORT_C_MASK) != 0)
1723 usb_hcd_poll_rh_status (hcd);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001724 return retval;
1725}
1726
Alan Stern0c0382e2005-10-13 17:08:02 -04001727static int dummy_bus_suspend (struct usb_hcd *hcd)
Alan Stern391eca92005-05-10 15:34:16 -04001728{
1729 struct dummy *dum = hcd_to_dummy (hcd);
1730
Harvey Harrison441b62c2008-03-03 16:08:34 -08001731 dev_dbg (&hcd->self.root_hub->dev, "%s\n", __func__);
Alan Stern3cf0a222005-11-29 12:08:15 -05001732
Alan Stern391eca92005-05-10 15:34:16 -04001733 spin_lock_irq (&dum->lock);
1734 dum->rh_state = DUMMY_RH_SUSPENDED;
1735 set_link_state (dum);
Alan Stern3cf0a222005-11-29 12:08:15 -05001736 hcd->state = HC_STATE_SUSPENDED;
Alan Stern391eca92005-05-10 15:34:16 -04001737 spin_unlock_irq (&dum->lock);
1738 return 0;
1739}
1740
Alan Stern0c0382e2005-10-13 17:08:02 -04001741static int dummy_bus_resume (struct usb_hcd *hcd)
Alan Stern391eca92005-05-10 15:34:16 -04001742{
1743 struct dummy *dum = hcd_to_dummy (hcd);
Alan Stern3cf0a222005-11-29 12:08:15 -05001744 int rc = 0;
1745
Harvey Harrison441b62c2008-03-03 16:08:34 -08001746 dev_dbg (&hcd->self.root_hub->dev, "%s\n", __func__);
Alan Stern391eca92005-05-10 15:34:16 -04001747
1748 spin_lock_irq (&dum->lock);
Alan Stern3cf0a222005-11-29 12:08:15 -05001749 if (!test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags)) {
Alan Sterncfa59da2007-06-21 16:25:35 -04001750 rc = -ESHUTDOWN;
Alan Stern3cf0a222005-11-29 12:08:15 -05001751 } else {
1752 dum->rh_state = DUMMY_RH_RUNNING;
1753 set_link_state (dum);
1754 if (!list_empty(&dum->urbp_list))
1755 mod_timer (&dum->timer, jiffies);
1756 hcd->state = HC_STATE_RUNNING;
1757 }
Alan Stern391eca92005-05-10 15:34:16 -04001758 spin_unlock_irq (&dum->lock);
Alan Stern3cf0a222005-11-29 12:08:15 -05001759 return rc;
Alan Stern391eca92005-05-10 15:34:16 -04001760}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001761
1762/*-------------------------------------------------------------------------*/
1763
1764static inline ssize_t
1765show_urb (char *buf, size_t size, struct urb *urb)
1766{
1767 int ep = usb_pipeendpoint (urb->pipe);
1768
1769 return snprintf (buf, size,
1770 "urb/%p %s ep%d%s%s len %d/%d\n",
1771 urb,
1772 ({ char *s;
1773 switch (urb->dev->speed) {
1774 case USB_SPEED_LOW: s = "ls"; break;
1775 case USB_SPEED_FULL: s = "fs"; break;
1776 case USB_SPEED_HIGH: s = "hs"; break;
1777 default: s = "?"; break;
1778 }; s; }),
1779 ep, ep ? (usb_pipein (urb->pipe) ? "in" : "out") : "",
1780 ({ char *s; \
1781 switch (usb_pipetype (urb->pipe)) { \
1782 case PIPE_CONTROL: s = ""; break; \
1783 case PIPE_BULK: s = "-bulk"; break; \
1784 case PIPE_INTERRUPT: s = "-int"; break; \
1785 default: s = "-iso"; break; \
1786 }; s;}),
1787 urb->actual_length, urb->transfer_buffer_length);
1788}
1789
1790static ssize_t
Yani Ioannou10523b32005-05-17 06:43:37 -04001791show_urbs (struct device *dev, struct device_attribute *attr, char *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001792{
1793 struct usb_hcd *hcd = dev_get_drvdata (dev);
1794 struct dummy *dum = hcd_to_dummy (hcd);
1795 struct urbp *urbp;
1796 size_t size = 0;
1797 unsigned long flags;
1798
1799 spin_lock_irqsave (&dum->lock, flags);
1800 list_for_each_entry (urbp, &dum->urbp_list, urbp_list) {
1801 size_t temp;
1802
1803 temp = show_urb (buf, PAGE_SIZE - size, urbp->urb);
1804 buf += temp;
1805 size += temp;
1806 }
1807 spin_unlock_irqrestore (&dum->lock, flags);
1808
1809 return size;
1810}
1811static DEVICE_ATTR (urbs, S_IRUGO, show_urbs, NULL);
1812
1813static int dummy_start (struct usb_hcd *hcd)
1814{
1815 struct dummy *dum;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001816
1817 dum = hcd_to_dummy (hcd);
1818
1819 /*
1820 * MASTER side init ... we emulate a root hub that'll only ever
1821 * talk to one device (the slave side). Also appears in sysfs,
1822 * just like more familiar pci-based HCDs.
1823 */
1824 spin_lock_init (&dum->lock);
1825 init_timer (&dum->timer);
1826 dum->timer.function = dummy_timer;
1827 dum->timer.data = (unsigned long) dum;
Alan Stern391eca92005-05-10 15:34:16 -04001828 dum->rh_state = DUMMY_RH_RUNNING;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001829
1830 INIT_LIST_HEAD (&dum->urbp_list);
1831
Alan Sterncaf29f62007-12-06 11:10:39 -05001832 hcd->power_budget = POWER_BUDGET;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001833 hcd->state = HC_STATE_RUNNING;
Alan Stern685eb932005-05-03 16:27:26 -04001834 hcd->uses_new_polling = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001835
Alan Stern5742b0c2005-05-02 11:25:17 -04001836#ifdef CONFIG_USB_OTG
1837 hcd->self.otg_port = 1;
1838#endif
1839
Linus Torvalds1da177e2005-04-16 15:20:36 -07001840 /* FIXME 'urbs' should be a per-device thing, maybe in usbcore */
Alan Sternefd54a32006-09-25 11:55:56 -04001841 return device_create_file (dummy_dev(dum), &dev_attr_urbs);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001842}
1843
1844static void dummy_stop (struct usb_hcd *hcd)
1845{
1846 struct dummy *dum;
1847
1848 dum = hcd_to_dummy (hcd);
1849
1850 device_remove_file (dummy_dev(dum), &dev_attr_urbs);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001851 usb_gadget_unregister_driver (dum->driver);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001852 dev_info (dummy_dev(dum), "stopped\n");
1853}
1854
1855/*-------------------------------------------------------------------------*/
1856
1857static int dummy_h_get_frame (struct usb_hcd *hcd)
1858{
1859 return dummy_g_get_frame (NULL);
1860}
1861
1862static const struct hc_driver dummy_hcd = {
1863 .description = (char *) driver_name,
1864 .product_desc = "Dummy host controller",
1865 .hcd_priv_size = sizeof(struct dummy),
1866
1867 .flags = HCD_USB2,
1868
1869 .start = dummy_start,
1870 .stop = dummy_stop,
1871
1872 .urb_enqueue = dummy_urb_enqueue,
1873 .urb_dequeue = dummy_urb_dequeue,
1874
1875 .get_frame_number = dummy_h_get_frame,
1876
1877 .hub_status_data = dummy_hub_status,
1878 .hub_control = dummy_hub_control,
Alan Stern0c0382e2005-10-13 17:08:02 -04001879 .bus_suspend = dummy_bus_suspend,
1880 .bus_resume = dummy_bus_resume,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001881};
1882
Alan Stern8364d6b2005-11-14 12:16:30 -05001883static int dummy_hcd_probe(struct platform_device *pdev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001884{
1885 struct usb_hcd *hcd;
1886 int retval;
1887
Alan Stern8364d6b2005-11-14 12:16:30 -05001888 dev_info(&pdev->dev, "%s, driver " DRIVER_VERSION "\n", driver_desc);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001889
Kay Sievers7071a3c2008-05-02 06:02:41 +02001890 hcd = usb_create_hcd(&dummy_hcd, &pdev->dev, dev_name(&pdev->dev));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001891 if (!hcd)
1892 return -ENOMEM;
1893 the_controller = hcd_to_dummy (hcd);
1894
1895 retval = usb_add_hcd(hcd, 0, 0);
1896 if (retval != 0) {
1897 usb_put_hcd (hcd);
1898 the_controller = NULL;
1899 }
1900 return retval;
1901}
1902
Alan Stern8364d6b2005-11-14 12:16:30 -05001903static int dummy_hcd_remove (struct platform_device *pdev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001904{
1905 struct usb_hcd *hcd;
1906
Alan Stern8364d6b2005-11-14 12:16:30 -05001907 hcd = platform_get_drvdata (pdev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001908 usb_remove_hcd (hcd);
1909 usb_put_hcd (hcd);
1910 the_controller = NULL;
Alan Sternd9b76252005-05-03 16:15:43 -04001911 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001912}
1913
Alan Stern8364d6b2005-11-14 12:16:30 -05001914static int dummy_hcd_suspend (struct platform_device *pdev, pm_message_t state)
Alan Stern391eca92005-05-10 15:34:16 -04001915{
1916 struct usb_hcd *hcd;
Alan Stern3cf0a222005-11-29 12:08:15 -05001917 struct dummy *dum;
1918 int rc = 0;
Alan Stern391eca92005-05-10 15:34:16 -04001919
Harvey Harrison441b62c2008-03-03 16:08:34 -08001920 dev_dbg (&pdev->dev, "%s\n", __func__);
Alan Stern391eca92005-05-10 15:34:16 -04001921
Alan Stern3cf0a222005-11-29 12:08:15 -05001922 hcd = platform_get_drvdata (pdev);
1923 dum = hcd_to_dummy (hcd);
1924 if (dum->rh_state == DUMMY_RH_RUNNING) {
1925 dev_warn(&pdev->dev, "Root hub isn't suspended!\n");
1926 rc = -EBUSY;
1927 } else
1928 clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
1929 return rc;
Alan Stern391eca92005-05-10 15:34:16 -04001930}
1931
Alan Stern8364d6b2005-11-14 12:16:30 -05001932static int dummy_hcd_resume (struct platform_device *pdev)
Alan Stern391eca92005-05-10 15:34:16 -04001933{
1934 struct usb_hcd *hcd;
1935
Harvey Harrison441b62c2008-03-03 16:08:34 -08001936 dev_dbg (&pdev->dev, "%s\n", __func__);
Alan Stern391eca92005-05-10 15:34:16 -04001937
Alan Stern3cf0a222005-11-29 12:08:15 -05001938 hcd = platform_get_drvdata (pdev);
1939 set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
Alan Stern391eca92005-05-10 15:34:16 -04001940 usb_hcd_poll_rh_status (hcd);
1941 return 0;
1942}
1943
Russell King3ae5eae2005-11-09 22:32:44 +00001944static struct platform_driver dummy_hcd_driver = {
Alan Sternd9b76252005-05-03 16:15:43 -04001945 .probe = dummy_hcd_probe,
1946 .remove = dummy_hcd_remove,
Alan Stern391eca92005-05-10 15:34:16 -04001947 .suspend = dummy_hcd_suspend,
1948 .resume = dummy_hcd_resume,
Russell King3ae5eae2005-11-09 22:32:44 +00001949 .driver = {
1950 .name = (char *) driver_name,
1951 .owner = THIS_MODULE,
1952 },
Alan Sternd9b76252005-05-03 16:15:43 -04001953};
1954
Linus Torvalds1da177e2005-04-16 15:20:36 -07001955/*-------------------------------------------------------------------------*/
1956
Alan Sterna89a2cd2008-04-07 15:03:25 -04001957static struct platform_device *the_udc_pdev;
1958static struct platform_device *the_hcd_pdev;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001959
1960static int __init init (void)
1961{
Alan Sterna89a2cd2008-04-07 15:03:25 -04001962 int retval = -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001963
1964 if (usb_disabled ())
1965 return -ENODEV;
Alan Sternd9b76252005-05-03 16:15:43 -04001966
Alan Sterna89a2cd2008-04-07 15:03:25 -04001967 the_hcd_pdev = platform_device_alloc(driver_name, -1);
1968 if (!the_hcd_pdev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001969 return retval;
Alan Sterna89a2cd2008-04-07 15:03:25 -04001970 the_udc_pdev = platform_device_alloc(gadget_name, -1);
1971 if (!the_udc_pdev)
1972 goto err_alloc_udc;
Alan Sternd9b76252005-05-03 16:15:43 -04001973
Alan Sterna89a2cd2008-04-07 15:03:25 -04001974 retval = platform_driver_register(&dummy_hcd_driver);
1975 if (retval < 0)
1976 goto err_register_hcd_driver;
1977 retval = platform_driver_register(&dummy_udc_driver);
Alan Sternd9b76252005-05-03 16:15:43 -04001978 if (retval < 0)
1979 goto err_register_udc_driver;
1980
Alan Sterna89a2cd2008-04-07 15:03:25 -04001981 retval = platform_device_add(the_hcd_pdev);
Alan Sternd9b76252005-05-03 16:15:43 -04001982 if (retval < 0)
Alan Sterna89a2cd2008-04-07 15:03:25 -04001983 goto err_add_hcd;
1984 retval = platform_device_add(the_udc_pdev);
Alan Sternd9b76252005-05-03 16:15:43 -04001985 if (retval < 0)
Alan Sterna89a2cd2008-04-07 15:03:25 -04001986 goto err_add_udc;
Alan Sternd9b76252005-05-03 16:15:43 -04001987 return retval;
1988
Alan Sterna89a2cd2008-04-07 15:03:25 -04001989err_add_udc:
1990 platform_device_del(the_hcd_pdev);
1991err_add_hcd:
1992 platform_driver_unregister(&dummy_udc_driver);
Alan Sternd9b76252005-05-03 16:15:43 -04001993err_register_udc_driver:
Alan Sterna89a2cd2008-04-07 15:03:25 -04001994 platform_driver_unregister(&dummy_hcd_driver);
1995err_register_hcd_driver:
1996 platform_device_put(the_udc_pdev);
1997err_alloc_udc:
1998 platform_device_put(the_hcd_pdev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001999 return retval;
2000}
2001module_init (init);
2002
2003static void __exit cleanup (void)
2004{
Alan Sterna89a2cd2008-04-07 15:03:25 -04002005 platform_device_unregister(the_udc_pdev);
2006 platform_device_unregister(the_hcd_pdev);
2007 platform_driver_unregister(&dummy_udc_driver);
2008 platform_driver_unregister(&dummy_hcd_driver);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002009}
2010module_exit (cleanup);