2 * dummy_hcd.c -- Dummy/Loopback USB host and device emulator driver.
4 * Maintainer: Alan Stern <stern@rowland.harvard.edu>
6 * Copyright (C) 2003 David Brownell
7 * Copyright (C) 2003-2005 Alan Stern
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.
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.
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
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:
30 * - Gadget driver, responding to requests (slave);
31 * - Host-side device driver, as already familiar in Linux.
33 * Having this all in one kernel can help some stages of development,
34 * bypassing some hardware (and driver) issues. UML could help too.
37 #include <linux/module.h>
38 #include <linux/kernel.h>
39 #include <linux/delay.h>
40 #include <linux/ioport.h>
41 #include <linux/slab.h>
42 #include <linux/errno.h>
43 #include <linux/init.h>
44 #include <linux/timer.h>
45 #include <linux/list.h>
46 #include <linux/interrupt.h>
47 #include <linux/platform_device.h>
48 #include <linux/usb.h>
49 #include <linux/usb/gadget.h>
50 #include <linux/usb/hcd.h>
52 #include <asm/byteorder.h>
55 #include <asm/system.h>
56 #include <asm/unaligned.h>
59 #define DRIVER_DESC "USB Host+Gadget Emulator"
60 #define DRIVER_VERSION "02 May 2005"
62 #define POWER_BUDGET 500 /* in mA; use 8 for low-power port testing */
64 static const char driver_name
[] = "dummy_hcd";
65 static const char driver_desc
[] = "USB Host+Gadget Emulator";
67 static const char gadget_name
[] = "dummy_udc";
69 MODULE_DESCRIPTION (DRIVER_DESC
);
70 MODULE_AUTHOR ("David Brownell");
71 MODULE_LICENSE ("GPL");
73 /*-------------------------------------------------------------------------*/
75 /* gadget side driver data structres */
77 struct list_head queue
;
78 unsigned long last_io
; /* jiffies timestamp */
79 struct usb_gadget
*gadget
;
80 const struct usb_endpoint_descriptor
*desc
;
84 unsigned already_seen
: 1;
85 unsigned setup_stage
: 1;
88 struct dummy_request
{
89 struct list_head queue
; /* ep's requests */
90 struct usb_request req
;
93 static inline struct dummy_ep
*usb_ep_to_dummy_ep (struct usb_ep
*_ep
)
95 return container_of (_ep
, struct dummy_ep
, ep
);
98 static inline struct dummy_request
*usb_request_to_dummy_request
99 (struct usb_request
*_req
)
101 return container_of (_req
, struct dummy_request
, req
);
104 /*-------------------------------------------------------------------------*/
107 * Every device has ep0 for control requests, plus up to 30 more endpoints,
108 * in one of two types:
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.
113 * - Fixed Function: in other cases. some characteristics may be mutable;
114 * that'd be hardware-specific. Names like "ep12out-bulk" are used.
116 * Gadget drivers are responsible for not setting up conflicting endpoint
117 * configurations, illegal or unsupported packet lengths, and so on.
120 static const char ep0name
[] = "ep0";
122 static const char *const ep_name
[] = {
123 ep0name
, /* everyone has ep0 */
125 /* act like a net2280: high speed, six configurable endpoints */
126 "ep-a", "ep-b", "ep-c", "ep-d", "ep-e", "ep-f",
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",
134 /* or like sa1100: two fixed function endpoints */
135 "ep1out-bulk", "ep2in-bulk",
137 #define DUMMY_ENDPOINTS ARRAY_SIZE(ep_name)
139 /*-------------------------------------------------------------------------*/
145 struct list_head urbp_list
;
149 enum dummy_rh_state
{
159 * SLAVE/GADGET side support
161 struct dummy_ep ep
[DUMMY_ENDPOINTS
];
163 struct usb_gadget gadget
;
164 struct usb_gadget_driver
*driver
;
165 struct dummy_request fifo_req
;
166 u8 fifo_buf
[FIFO_SIZE
];
168 unsigned udc_suspended
:1;
171 unsigned old_active
:1;
174 * MASTER/HOST side support
176 enum dummy_rh_state rh_state
;
177 struct timer_list timer
;
181 unsigned long re_timeout
;
183 struct usb_device
*udev
;
184 struct list_head urbp_list
;
187 static inline struct dummy
*hcd_to_dummy (struct usb_hcd
*hcd
)
189 return (struct dummy
*) (hcd
->hcd_priv
);
192 static inline struct usb_hcd
*dummy_to_hcd (struct dummy
*dum
)
194 return container_of((void *) dum
, struct usb_hcd
, hcd_priv
);
197 static inline struct device
*dummy_dev (struct dummy
*dum
)
199 return dummy_to_hcd(dum
)->self
.controller
;
202 static inline struct device
*udc_dev (struct dummy
*dum
)
204 return dum
->gadget
.dev
.parent
;
207 static inline struct dummy
*ep_to_dummy (struct dummy_ep
*ep
)
209 return container_of (ep
->gadget
, struct dummy
, gadget
);
212 static inline struct dummy
*gadget_to_dummy (struct usb_gadget
*gadget
)
214 return container_of (gadget
, struct dummy
, gadget
);
217 static inline struct dummy
*gadget_dev_to_dummy (struct device
*dev
)
219 return container_of (dev
, struct dummy
, gadget
.dev
);
222 static struct dummy
*the_controller
;
224 /*-------------------------------------------------------------------------*/
226 /* SLAVE/GADGET SIDE UTILITY ROUTINES */
228 /* called with spinlock held */
229 static void nuke (struct dummy
*dum
, struct dummy_ep
*ep
)
231 while (!list_empty (&ep
->queue
)) {
232 struct dummy_request
*req
;
234 req
= list_entry (ep
->queue
.next
, struct dummy_request
, queue
);
235 list_del_init (&req
->queue
);
236 req
->req
.status
= -ESHUTDOWN
;
238 spin_unlock (&dum
->lock
);
239 req
->req
.complete (&ep
->ep
, &req
->req
);
240 spin_lock (&dum
->lock
);
244 /* caller must hold lock */
246 stop_activity (struct dummy
*dum
)
250 /* prevent any more requests */
253 /* The timer is left running so that outstanding URBs can fail */
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
)
259 /* driver now does any non-usb quiescing necessary */
262 /* caller must hold lock */
264 set_link_state (struct dummy
*dum
)
267 if ((dum
->port_status
& USB_PORT_STAT_POWER
) == 0)
268 dum
->port_status
= 0;
270 /* UDC suspend must cause a disconnect */
271 else if (!dum
->pullup
|| dum
->udc_suspended
) {
272 dum
->port_status
&= ~(USB_PORT_STAT_CONNECTION
|
273 USB_PORT_STAT_ENABLE
|
274 USB_PORT_STAT_LOW_SPEED
|
275 USB_PORT_STAT_HIGH_SPEED
|
276 USB_PORT_STAT_SUSPEND
);
277 if ((dum
->old_status
& USB_PORT_STAT_CONNECTION
) != 0)
278 dum
->port_status
|= (USB_PORT_STAT_C_CONNECTION
<< 16);
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
;
285 else if ((dum
->port_status
& USB_PORT_STAT_SUSPEND
) == 0 &&
286 dum
->rh_state
!= DUMMY_RH_SUSPENDED
)
290 if ((dum
->port_status
& USB_PORT_STAT_ENABLE
) == 0 || dum
->active
)
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 &&
299 spin_unlock (&dum
->lock
);
300 dum
->driver
->disconnect (&dum
->gadget
);
301 spin_lock (&dum
->lock
);
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
);
315 dum
->old_status
= dum
->port_status
;
316 dum
->old_active
= dum
->active
;
319 /*-------------------------------------------------------------------------*/
321 /* SLAVE/GADGET SIDE DRIVER
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.
328 #define is_enabled(dum) \
329 (dum->port_status & USB_PORT_STAT_ENABLE)
332 dummy_enable (struct usb_ep
*_ep
, const struct usb_endpoint_descriptor
*desc
)
339 ep
= usb_ep_to_dummy_ep (_ep
);
340 if (!_ep
|| !desc
|| ep
->desc
|| _ep
->name
== ep0name
341 || desc
->bDescriptorType
!= USB_DT_ENDPOINT
)
343 dum
= ep_to_dummy (ep
);
344 if (!dum
->driver
|| !is_enabled (dum
))
346 max
= le16_to_cpu(desc
->wMaxPacketSize
) & 0x3ff;
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.
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.)
357 switch (desc
->bmAttributes
& 0x03) {
358 case USB_ENDPOINT_XFER_BULK
:
359 if (strstr (ep
->ep
.name
, "-iso")
360 || strstr (ep
->ep
.name
, "-int")) {
363 switch (dum
->gadget
.speed
) {
369 if (max
== 8 || max
== 16 || max
== 32 || max
== 64)
370 /* we'll fake any legal size */
372 /* save a return statement */
377 case USB_ENDPOINT_XFER_INT
:
378 if (strstr (ep
->ep
.name
, "-iso")) /* bulk is ok */
380 /* real hardware might not handle all packet sizes */
381 switch (dum
->gadget
.speed
) {
385 /* save a return statement */
389 /* save a return statement */
396 case USB_ENDPOINT_XFER_ISOC
:
397 if (strstr (ep
->ep
.name
, "-bulk")
398 || strstr (ep
->ep
.name
, "-int"))
400 /* real hardware might not handle all packet sizes */
401 switch (dum
->gadget
.speed
) {
405 /* save a return statement */
409 /* save a return statement */
415 /* few chips support control except on ep0 */
419 _ep
->maxpacket
= max
;
422 dev_dbg (udc_dev(dum
), "enabled %s (ep%d%s-%s) maxpacket %d\n",
424 desc
->bEndpointAddress
& 0x0f,
425 (desc
->bEndpointAddress
& USB_DIR_IN
) ? "in" : "out",
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;
435 /* at this point real hardware should be NAKing transfers
436 * to that endpoint, until a buffer is queued to it.
438 ep
->halted
= ep
->wedged
= 0;
444 static int dummy_disable (struct usb_ep
*_ep
)
451 ep
= usb_ep_to_dummy_ep (_ep
);
452 if (!_ep
|| !ep
->desc
|| _ep
->name
== ep0name
)
454 dum
= ep_to_dummy (ep
);
456 spin_lock_irqsave (&dum
->lock
, flags
);
460 spin_unlock_irqrestore (&dum
->lock
, flags
);
462 dev_dbg (udc_dev(dum
), "disabled %s\n", _ep
->name
);
466 static struct usb_request
*
467 dummy_alloc_request (struct usb_ep
*_ep
, gfp_t mem_flags
)
470 struct dummy_request
*req
;
474 ep
= usb_ep_to_dummy_ep (_ep
);
476 req
= kzalloc(sizeof(*req
), mem_flags
);
479 INIT_LIST_HEAD (&req
->queue
);
484 dummy_free_request (struct usb_ep
*_ep
, struct usb_request
*_req
)
487 struct dummy_request
*req
;
489 ep
= usb_ep_to_dummy_ep (_ep
);
490 if (!ep
|| !_req
|| (!ep
->desc
&& _ep
->name
!= ep0name
))
493 req
= usb_request_to_dummy_request (_req
);
494 WARN_ON (!list_empty (&req
->queue
));
499 fifo_complete (struct usb_ep
*ep
, struct usb_request
*req
)
504 dummy_queue (struct usb_ep
*_ep
, struct usb_request
*_req
,
508 struct dummy_request
*req
;
512 req
= usb_request_to_dummy_request (_req
);
513 if (!_req
|| !list_empty (&req
->queue
) || !_req
->complete
)
516 ep
= usb_ep_to_dummy_ep (_ep
);
517 if (!_ep
|| (!ep
->desc
&& _ep
->name
!= ep0name
))
520 dum
= ep_to_dummy (ep
);
521 if (!dum
->driver
|| !is_enabled (dum
))
525 dev_dbg (udc_dev(dum
), "ep %p queue req %p to %s, len %d buf %p\n",
526 ep
, _req
, _ep
->name
, _req
->length
, _req
->buf
);
529 _req
->status
= -EINPROGRESS
;
531 spin_lock_irqsave (&dum
->lock
, flags
);
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
;
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
;
545 list_add_tail(&req
->queue
, &ep
->queue
);
546 spin_unlock (&dum
->lock
);
547 _req
->actual
= _req
->length
;
549 _req
->complete (_ep
, _req
);
550 spin_lock (&dum
->lock
);
552 list_add_tail(&req
->queue
, &ep
->queue
);
553 spin_unlock_irqrestore (&dum
->lock
, flags
);
555 /* real hardware would likely enable transfers here, in case
556 * it'd been left NAKing.
561 static int dummy_dequeue (struct usb_ep
*_ep
, struct usb_request
*_req
)
565 int retval
= -EINVAL
;
567 struct dummy_request
*req
= NULL
;
571 ep
= usb_ep_to_dummy_ep (_ep
);
572 dum
= ep_to_dummy (ep
);
577 local_irq_save (flags
);
578 spin_lock (&dum
->lock
);
579 list_for_each_entry (req
, &ep
->queue
, queue
) {
580 if (&req
->req
== _req
) {
581 list_del_init (&req
->queue
);
582 _req
->status
= -ECONNRESET
;
587 spin_unlock (&dum
->lock
);
590 dev_dbg (udc_dev(dum
),
591 "dequeued req %p from %s, len %d buf %p\n",
592 req
, _ep
->name
, _req
->length
, _req
->buf
);
593 _req
->complete (_ep
, _req
);
595 local_irq_restore (flags
);
600 dummy_set_halt_and_wedge(struct usb_ep
*_ep
, int value
, int wedged
)
607 ep
= usb_ep_to_dummy_ep (_ep
);
608 dum
= ep_to_dummy (ep
);
612 ep
->halted
= ep
->wedged
= 0;
613 else if (ep
->desc
&& (ep
->desc
->bEndpointAddress
& USB_DIR_IN
) &&
614 !list_empty (&ep
->queue
))
621 /* FIXME clear emulated data toggle too */
626 dummy_set_halt(struct usb_ep
*_ep
, int value
)
628 return dummy_set_halt_and_wedge(_ep
, value
, 0);
631 static int dummy_set_wedge(struct usb_ep
*_ep
)
633 if (!_ep
|| _ep
->name
== ep0name
)
635 return dummy_set_halt_and_wedge(_ep
, 1, 1);
638 static const struct usb_ep_ops dummy_ep_ops
= {
639 .enable
= dummy_enable
,
640 .disable
= dummy_disable
,
642 .alloc_request
= dummy_alloc_request
,
643 .free_request
= dummy_free_request
,
645 .queue
= dummy_queue
,
646 .dequeue
= dummy_dequeue
,
648 .set_halt
= dummy_set_halt
,
649 .set_wedge
= dummy_set_wedge
,
652 /*-------------------------------------------------------------------------*/
654 /* there are both host and device side versions of this call ... */
655 static int dummy_g_get_frame (struct usb_gadget
*_gadget
)
659 do_gettimeofday (&tv
);
660 return tv
.tv_usec
/ 1000;
663 static int dummy_wakeup (struct usb_gadget
*_gadget
)
667 dum
= gadget_to_dummy (_gadget
);
668 if (!(dum
->devstatus
& ( (1 << USB_DEVICE_B_HNP_ENABLE
)
669 | (1 << USB_DEVICE_REMOTE_WAKEUP
))))
671 if ((dum
->port_status
& USB_PORT_STAT_CONNECTION
) == 0)
673 if ((dum
->port_status
& USB_PORT_STAT_SUSPEND
) == 0 &&
674 dum
->rh_state
!= DUMMY_RH_SUSPENDED
)
677 /* FIXME: What if the root hub is suspended but the port isn't? */
679 /* hub notices our request, issues downstream resume, etc */
681 dum
->re_timeout
= jiffies
+ msecs_to_jiffies(20);
682 mod_timer (&dummy_to_hcd (dum
)->rh_timer
, dum
->re_timeout
);
686 static int dummy_set_selfpowered (struct usb_gadget
*_gadget
, int value
)
690 dum
= gadget_to_dummy (_gadget
);
692 dum
->devstatus
|= (1 << USB_DEVICE_SELF_POWERED
);
694 dum
->devstatus
&= ~(1 << USB_DEVICE_SELF_POWERED
);
698 static int dummy_pullup (struct usb_gadget
*_gadget
, int value
)
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
);
709 usb_hcd_poll_rh_status (dummy_to_hcd (dum
));
713 static const struct usb_gadget_ops dummy_ops
= {
714 .get_frame
= dummy_g_get_frame
,
715 .wakeup
= dummy_wakeup
,
716 .set_selfpowered
= dummy_set_selfpowered
,
717 .pullup
= dummy_pullup
,
720 /*-------------------------------------------------------------------------*/
722 /* "function" sysfs attribute */
724 show_function (struct device
*dev
, struct device_attribute
*attr
, char *buf
)
726 struct dummy
*dum
= gadget_dev_to_dummy (dev
);
728 if (!dum
->driver
|| !dum
->driver
->function
)
730 return scnprintf (buf
, PAGE_SIZE
, "%s\n", dum
->driver
->function
);
732 static DEVICE_ATTR (function
, S_IRUGO
, show_function
, NULL
);
734 /*-------------------------------------------------------------------------*/
737 * Driver registration/unregistration.
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.
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.
751 usb_gadget_register_driver (struct usb_gadget_driver
*driver
)
753 struct dummy
*dum
= the_controller
;
760 if (!driver
->bind
|| !driver
->setup
761 || driver
->speed
== USB_SPEED_UNKNOWN
)
765 * SLAVE side init ... the layer above hardware, which
766 * can't enumerate without help from the driver we're binding.
771 INIT_LIST_HEAD (&dum
->gadget
.ep_list
);
772 for (i
= 0; i
< DUMMY_ENDPOINTS
; i
++) {
773 struct dummy_ep
*ep
= &dum
->ep
[i
];
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
);
780 ep
->halted
= ep
->wedged
= ep
->already_seen
=
782 ep
->ep
.maxpacket
= ~0;
783 ep
->last_io
= jiffies
;
784 ep
->gadget
= &dum
->gadget
;
786 INIT_LIST_HEAD (&ep
->queue
);
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
);
794 driver
->driver
.bus
= NULL
;
795 dum
->driver
= driver
;
796 dum
->gadget
.dev
.driver
= &driver
->driver
;
797 dev_dbg (udc_dev(dum
), "binding gadget driver '%s'\n",
798 driver
->driver
.name
);
799 retval
= driver
->bind(&dum
->gadget
);
802 dum
->gadget
.dev
.driver
= NULL
;
806 /* khubd will enumerate this in a while */
807 spin_lock_irq (&dum
->lock
);
809 set_link_state (dum
);
810 spin_unlock_irq (&dum
->lock
);
812 usb_hcd_poll_rh_status (dummy_to_hcd (dum
));
815 EXPORT_SYMBOL (usb_gadget_register_driver
);
818 usb_gadget_unregister_driver (struct usb_gadget_driver
*driver
)
820 struct dummy
*dum
= the_controller
;
825 if (!driver
|| driver
!= dum
->driver
|| !driver
->unbind
)
828 dev_dbg (udc_dev(dum
), "unregister gadget driver '%s'\n",
829 driver
->driver
.name
);
831 spin_lock_irqsave (&dum
->lock
, flags
);
833 set_link_state (dum
);
834 spin_unlock_irqrestore (&dum
->lock
, flags
);
836 driver
->unbind (&dum
->gadget
);
837 dum
->gadget
.dev
.driver
= NULL
;
840 spin_lock_irqsave (&dum
->lock
, flags
);
842 set_link_state (dum
);
843 spin_unlock_irqrestore (&dum
->lock
, flags
);
845 usb_hcd_poll_rh_status (dummy_to_hcd (dum
));
848 EXPORT_SYMBOL (usb_gadget_unregister_driver
);
852 /* just declare this in any driver that really need it */
853 extern int net2280_set_fifo_mode (struct usb_gadget
*gadget
, int mode
);
855 int net2280_set_fifo_mode (struct usb_gadget
*gadget
, int mode
)
859 EXPORT_SYMBOL (net2280_set_fifo_mode
);
862 /* The gadget structure is stored inside the hcd structure and will be
863 * released along with it. */
865 dummy_gadget_release (struct device
*dev
)
867 struct dummy
*dum
= gadget_dev_to_dummy (dev
);
869 usb_put_hcd (dummy_to_hcd (dum
));
872 static int dummy_udc_probe (struct platform_device
*pdev
)
874 struct dummy
*dum
= the_controller
;
877 dum
->gadget
.name
= gadget_name
;
878 dum
->gadget
.ops
= &dummy_ops
;
879 dum
->gadget
.is_dualspeed
= 1;
881 /* maybe claim OTG support, though we won't complete HNP */
882 dum
->gadget
.is_otg
= (dummy_to_hcd(dum
)->self
.otg_port
!= 0);
884 dev_set_name(&dum
->gadget
.dev
, "gadget");
885 dum
->gadget
.dev
.parent
= &pdev
->dev
;
886 dum
->gadget
.dev
.release
= dummy_gadget_release
;
887 rc
= device_register (&dum
->gadget
.dev
);
891 usb_get_hcd (dummy_to_hcd (dum
));
893 platform_set_drvdata (pdev
, dum
);
894 rc
= device_create_file (&dum
->gadget
.dev
, &dev_attr_function
);
896 device_unregister (&dum
->gadget
.dev
);
900 static int dummy_udc_remove (struct platform_device
*pdev
)
902 struct dummy
*dum
= platform_get_drvdata (pdev
);
904 platform_set_drvdata (pdev
, NULL
);
905 device_remove_file (&dum
->gadget
.dev
, &dev_attr_function
);
906 device_unregister (&dum
->gadget
.dev
);
910 static int dummy_udc_suspend (struct platform_device
*pdev
, pm_message_t state
)
912 struct dummy
*dum
= platform_get_drvdata(pdev
);
914 dev_dbg (&pdev
->dev
, "%s\n", __func__
);
915 spin_lock_irq (&dum
->lock
);
916 dum
->udc_suspended
= 1;
917 set_link_state (dum
);
918 spin_unlock_irq (&dum
->lock
);
920 usb_hcd_poll_rh_status (dummy_to_hcd (dum
));
924 static int dummy_udc_resume (struct platform_device
*pdev
)
926 struct dummy
*dum
= platform_get_drvdata(pdev
);
928 dev_dbg (&pdev
->dev
, "%s\n", __func__
);
929 spin_lock_irq (&dum
->lock
);
930 dum
->udc_suspended
= 0;
931 set_link_state (dum
);
932 spin_unlock_irq (&dum
->lock
);
934 usb_hcd_poll_rh_status (dummy_to_hcd (dum
));
938 static struct platform_driver dummy_udc_driver
= {
939 .probe
= dummy_udc_probe
,
940 .remove
= dummy_udc_remove
,
941 .suspend
= dummy_udc_suspend
,
942 .resume
= dummy_udc_resume
,
944 .name
= (char *) gadget_name
,
945 .owner
= THIS_MODULE
,
949 /*-------------------------------------------------------------------------*/
951 /* MASTER/HOST SIDE DRIVER
953 * this uses the hcd framework to hook up to host side drivers.
954 * its root hub will only have one device, otherwise it acts like
955 * a normal host controller.
957 * when urbs are queued, they're just stuck on a list that we
958 * scan in a timer callback. that callback connects writes from
959 * the host with reads from the device, and so on, based on the
963 static int dummy_urb_enqueue (
973 if (!urb
->transfer_buffer
&& urb
->transfer_buffer_length
)
976 urbp
= kmalloc (sizeof *urbp
, mem_flags
);
981 dum
= hcd_to_dummy (hcd
);
982 spin_lock_irqsave (&dum
->lock
, flags
);
983 rc
= usb_hcd_link_urb_to_ep(hcd
, urb
);
990 dum
->udev
= urb
->dev
;
991 usb_get_dev (dum
->udev
);
992 } else if (unlikely (dum
->udev
!= urb
->dev
))
993 dev_err (dummy_dev(dum
), "usb_device address has changed!\n");
995 list_add_tail (&urbp
->urbp_list
, &dum
->urbp_list
);
997 if (usb_pipetype (urb
->pipe
) == PIPE_CONTROL
)
998 urb
->error_count
= 1; /* mark as a new urb */
1000 /* kick the scheduler, it'll do the rest */
1001 if (!timer_pending (&dum
->timer
))
1002 mod_timer (&dum
->timer
, jiffies
+ 1);
1005 spin_unlock_irqrestore(&dum
->lock
, flags
);
1009 static int dummy_urb_dequeue(struct usb_hcd
*hcd
, struct urb
*urb
, int status
)
1012 unsigned long flags
;
1015 /* giveback happens automatically in timer callback,
1016 * so make sure the callback happens */
1017 dum
= hcd_to_dummy (hcd
);
1018 spin_lock_irqsave (&dum
->lock
, flags
);
1020 rc
= usb_hcd_check_unlink_urb(hcd
, urb
, status
);
1021 if (!rc
&& dum
->rh_state
!= DUMMY_RH_RUNNING
&&
1022 !list_empty(&dum
->urbp_list
))
1023 mod_timer (&dum
->timer
, jiffies
);
1025 spin_unlock_irqrestore (&dum
->lock
, flags
);
1029 /* transfer up to a frame's worth; caller must own lock */
1031 transfer(struct dummy
*dum
, struct urb
*urb
, struct dummy_ep
*ep
, int limit
,
1034 struct dummy_request
*req
;
1037 /* if there's no request queued, the device is NAKing; return */
1038 list_for_each_entry (req
, &ep
->queue
, queue
) {
1039 unsigned host_len
, dev_len
, len
;
1040 int is_short
, to_host
;
1043 /* 1..N packets of ep->ep.maxpacket each ... the last one
1044 * may be short (including zero length).
1046 * writer can send a zlp explicitly (length 0) or implicitly
1047 * (length mod maxpacket zero, and 'zero' flag); they always
1050 host_len
= urb
->transfer_buffer_length
- urb
->actual_length
;
1051 dev_len
= req
->req
.length
- req
->req
.actual
;
1052 len
= min (host_len
, dev_len
);
1054 /* FIXME update emulated data toggle too */
1056 to_host
= usb_pipein (urb
->pipe
);
1057 if (unlikely (len
== 0))
1062 /* not enough bandwidth left? */
1063 if (limit
< ep
->ep
.maxpacket
&& limit
< len
)
1065 len
= min (len
, (unsigned) limit
);
1069 /* use an extra pass for the final short packet */
1070 if (len
> ep
->ep
.maxpacket
) {
1072 len
-= (len
% ep
->ep
.maxpacket
);
1074 is_short
= (len
% ep
->ep
.maxpacket
) != 0;
1076 /* else transfer packet(s) */
1077 ubuf
= urb
->transfer_buffer
+ urb
->actual_length
;
1078 rbuf
= req
->req
.buf
+ req
->req
.actual
;
1080 memcpy (ubuf
, rbuf
, len
);
1082 memcpy (rbuf
, ubuf
, len
);
1083 ep
->last_io
= jiffies
;
1086 urb
->actual_length
+= len
;
1087 req
->req
.actual
+= len
;
1090 /* short packets terminate, maybe with overflow/underflow.
1091 * it's only really an error to write too much.
1093 * partially filling a buffer optionally blocks queue advances
1094 * (so completion handlers can clean up the queue) but we don't
1095 * need to emulate such data-in-flight.
1098 if (host_len
== dev_len
) {
1099 req
->req
.status
= 0;
1101 } else if (to_host
) {
1102 req
->req
.status
= 0;
1103 if (dev_len
> host_len
)
1104 *status
= -EOVERFLOW
;
1107 } else if (!to_host
) {
1109 if (host_len
> dev_len
)
1110 req
->req
.status
= -EOVERFLOW
;
1112 req
->req
.status
= 0;
1115 /* many requests terminate without a short packet */
1117 if (req
->req
.length
== req
->req
.actual
1119 req
->req
.status
= 0;
1120 if (urb
->transfer_buffer_length
== urb
->actual_length
1121 && !(urb
->transfer_flags
1126 /* device side completion --> continuable */
1127 if (req
->req
.status
!= -EINPROGRESS
) {
1128 list_del_init (&req
->queue
);
1130 spin_unlock (&dum
->lock
);
1131 req
->req
.complete (&ep
->ep
, &req
->req
);
1132 spin_lock (&dum
->lock
);
1134 /* requests might have been unlinked... */
1138 /* host side completion --> terminate */
1139 if (*status
!= -EINPROGRESS
)
1142 /* rescan to continue with any other queued i/o */
1149 static int periodic_bytes (struct dummy
*dum
, struct dummy_ep
*ep
)
1151 int limit
= ep
->ep
.maxpacket
;
1153 if (dum
->gadget
.speed
== USB_SPEED_HIGH
) {
1156 /* high bandwidth mode */
1157 tmp
= le16_to_cpu(ep
->desc
->wMaxPacketSize
);
1158 tmp
= (tmp
>> 11) & 0x03;
1159 tmp
*= 8 /* applies to entire frame */;
1160 limit
+= limit
* tmp
;
1165 #define is_active(dum) ((dum->port_status & \
1166 (USB_PORT_STAT_CONNECTION | USB_PORT_STAT_ENABLE | \
1167 USB_PORT_STAT_SUSPEND)) \
1168 == (USB_PORT_STAT_CONNECTION | USB_PORT_STAT_ENABLE))
1170 static struct dummy_ep
*find_endpoint (struct dummy
*dum
, u8 address
)
1174 if (!is_active (dum
))
1176 if ((address
& ~USB_DIR_IN
) == 0)
1177 return &dum
->ep
[0];
1178 for (i
= 1; i
< DUMMY_ENDPOINTS
; i
++) {
1179 struct dummy_ep
*ep
= &dum
->ep
[i
];
1183 if (ep
->desc
->bEndpointAddress
== address
)
1191 #define Dev_Request (USB_TYPE_STANDARD | USB_RECIP_DEVICE)
1192 #define Dev_InRequest (Dev_Request | USB_DIR_IN)
1193 #define Intf_Request (USB_TYPE_STANDARD | USB_RECIP_INTERFACE)
1194 #define Intf_InRequest (Intf_Request | USB_DIR_IN)
1195 #define Ep_Request (USB_TYPE_STANDARD | USB_RECIP_ENDPOINT)
1196 #define Ep_InRequest (Ep_Request | USB_DIR_IN)
1198 /* drive both sides of the transfers; looks like irq handlers to
1199 * both drivers except the callbacks aren't in_irq().
1201 static void dummy_timer (unsigned long _dum
)
1203 struct dummy
*dum
= (struct dummy
*) _dum
;
1204 struct urbp
*urbp
, *tmp
;
1205 unsigned long flags
;
1209 /* simplistic model for one frame's bandwidth */
1210 switch (dum
->gadget
.speed
) {
1212 total
= 8/*bytes*/ * 12/*packets*/;
1214 case USB_SPEED_FULL
:
1215 total
= 64/*bytes*/ * 19/*packets*/;
1217 case USB_SPEED_HIGH
:
1218 total
= 512/*bytes*/ * 13/*packets*/ * 8/*uframes*/;
1221 dev_err (dummy_dev(dum
), "bogus device speed\n");
1225 /* FIXME if HZ != 1000 this will probably misbehave ... */
1227 /* look at each urb queued by the host side driver */
1228 spin_lock_irqsave (&dum
->lock
, flags
);
1231 dev_err (dummy_dev(dum
),
1232 "timer fired with no URBs pending?\n");
1233 spin_unlock_irqrestore (&dum
->lock
, flags
);
1237 for (i
= 0; i
< DUMMY_ENDPOINTS
; i
++) {
1240 dum
->ep
[i
].already_seen
= 0;
1244 list_for_each_entry_safe (urbp
, tmp
, &dum
->urbp_list
, urbp_list
) {
1246 struct dummy_request
*req
;
1248 struct dummy_ep
*ep
= NULL
;
1250 int status
= -EINPROGRESS
;
1255 else if (dum
->rh_state
!= DUMMY_RH_RUNNING
)
1257 type
= usb_pipetype (urb
->pipe
);
1259 /* used up this frame's non-periodic bandwidth?
1260 * FIXME there's infinite bandwidth for control and
1261 * periodic transfers ... unrealistic.
1263 if (total
<= 0 && type
== PIPE_BULK
)
1266 /* find the gadget's ep for this request (if configured) */
1267 address
= usb_pipeendpoint (urb
->pipe
);
1268 if (usb_pipein (urb
->pipe
))
1269 address
|= USB_DIR_IN
;
1270 ep
= find_endpoint(dum
, address
);
1272 /* set_configuration() disagreement */
1273 dev_dbg (dummy_dev(dum
),
1274 "no ep configured for urb %p\n",
1280 if (ep
->already_seen
)
1282 ep
->already_seen
= 1;
1283 if (ep
== &dum
->ep
[0] && urb
->error_count
) {
1284 ep
->setup_stage
= 1; /* a new urb */
1285 urb
->error_count
= 0;
1287 if (ep
->halted
&& !ep
->setup_stage
) {
1288 /* NOTE: must not be iso! */
1289 dev_dbg (dummy_dev(dum
), "ep %s halted, urb %p\n",
1294 /* FIXME make sure both ends agree on maxpacket */
1296 /* handle control requests */
1297 if (ep
== &dum
->ep
[0] && ep
->setup_stage
) {
1298 struct usb_ctrlrequest setup
;
1300 struct dummy_ep
*ep2
;
1304 setup
= *(struct usb_ctrlrequest
*) urb
->setup_packet
;
1305 w_index
= le16_to_cpu(setup
.wIndex
);
1306 w_value
= le16_to_cpu(setup
.wValue
);
1308 /* paranoia, in case of stale queued data */
1309 list_for_each_entry (req
, &ep
->queue
, queue
) {
1310 list_del_init (&req
->queue
);
1311 req
->req
.status
= -EOVERFLOW
;
1312 dev_dbg (udc_dev(dum
), "stale req = %p\n",
1315 spin_unlock (&dum
->lock
);
1316 req
->req
.complete (&ep
->ep
, &req
->req
);
1317 spin_lock (&dum
->lock
);
1318 ep
->already_seen
= 0;
1322 /* gadget driver never sees set_address or operations
1323 * on standard feature flags. some hardware doesn't
1326 ep
->last_io
= jiffies
;
1327 ep
->setup_stage
= 0;
1329 switch (setup
.bRequest
) {
1330 case USB_REQ_SET_ADDRESS
:
1331 if (setup
.bRequestType
!= Dev_Request
)
1333 dum
->address
= w_value
;
1335 dev_dbg (udc_dev(dum
), "set_address = %d\n",
1339 case USB_REQ_SET_FEATURE
:
1340 if (setup
.bRequestType
== Dev_Request
) {
1343 case USB_DEVICE_REMOTE_WAKEUP
:
1345 case USB_DEVICE_B_HNP_ENABLE
:
1346 dum
->gadget
.b_hnp_enable
= 1;
1348 case USB_DEVICE_A_HNP_SUPPORT
:
1349 dum
->gadget
.a_hnp_support
= 1;
1351 case USB_DEVICE_A_ALT_HNP_SUPPORT
:
1352 dum
->gadget
.a_alt_hnp_support
1356 value
= -EOPNOTSUPP
;
1364 } else if (setup
.bRequestType
== Ep_Request
) {
1366 ep2
= find_endpoint (dum
, w_index
);
1367 if (!ep2
|| ep2
->ep
.name
== ep0name
) {
1368 value
= -EOPNOTSUPP
;
1376 case USB_REQ_CLEAR_FEATURE
:
1377 if (setup
.bRequestType
== Dev_Request
) {
1379 case USB_DEVICE_REMOTE_WAKEUP
:
1380 dum
->devstatus
&= ~(1 <<
1381 USB_DEVICE_REMOTE_WAKEUP
);
1386 value
= -EOPNOTSUPP
;
1389 } else if (setup
.bRequestType
== Ep_Request
) {
1391 ep2
= find_endpoint (dum
, w_index
);
1393 value
= -EOPNOTSUPP
;
1402 case USB_REQ_GET_STATUS
:
1403 if (setup
.bRequestType
== Dev_InRequest
1404 || setup
.bRequestType
1406 || setup
.bRequestType
1411 // device: remote wakeup, selfpowered
1412 // interface: nothing
1414 buf
= (char *)urb
->transfer_buffer
;
1415 if (urb
->transfer_buffer_length
> 0) {
1416 if (setup
.bRequestType
==
1418 ep2
= find_endpoint (dum
, w_index
);
1420 value
= -EOPNOTSUPP
;
1423 buf
[0] = ep2
->halted
;
1424 } else if (setup
.bRequestType
==
1431 if (urb
->transfer_buffer_length
> 1)
1433 urb
->actual_length
= min_t(u32
, 2,
1434 urb
->transfer_buffer_length
);
1441 /* gadget driver handles all other requests. block
1442 * until setup() returns; no reentrancy issues etc.
1445 spin_unlock (&dum
->lock
);
1446 value
= dum
->driver
->setup (&dum
->gadget
,
1448 spin_lock (&dum
->lock
);
1451 /* no delays (max 64KB data stage) */
1453 goto treat_control_like_bulk
;
1455 /* error, see below */
1459 if (value
!= -EOPNOTSUPP
)
1460 dev_dbg (udc_dev(dum
),
1464 urb
->actual_length
= 0;
1470 /* non-control requests */
1472 switch (usb_pipetype (urb
->pipe
)) {
1473 case PIPE_ISOCHRONOUS
:
1474 /* FIXME is it urb->interval since the last xfer?
1475 * use urb->iso_frame_desc[i].
1476 * complete whether or not ep has requests queued.
1477 * report random errors, to debug drivers.
1479 limit
= max (limit
, periodic_bytes (dum
, ep
));
1483 case PIPE_INTERRUPT
:
1484 /* FIXME is it urb->interval since the last xfer?
1485 * this almost certainly polls too fast.
1487 limit
= max (limit
, periodic_bytes (dum
, ep
));
1490 // case PIPE_BULK: case PIPE_CONTROL:
1492 treat_control_like_bulk
:
1493 ep
->last_io
= jiffies
;
1494 total
= transfer(dum
, urb
, ep
, limit
, &status
);
1498 /* incomplete transfer? */
1499 if (status
== -EINPROGRESS
)
1503 list_del (&urbp
->urbp_list
);
1506 ep
->already_seen
= ep
->setup_stage
= 0;
1508 usb_hcd_unlink_urb_from_ep(dummy_to_hcd(dum
), urb
);
1509 spin_unlock (&dum
->lock
);
1510 usb_hcd_giveback_urb(dummy_to_hcd(dum
), urb
, status
);
1511 spin_lock (&dum
->lock
);
1516 if (list_empty (&dum
->urbp_list
)) {
1517 usb_put_dev (dum
->udev
);
1519 } else if (dum
->rh_state
== DUMMY_RH_RUNNING
) {
1520 /* want a 1 msec delay here */
1521 mod_timer (&dum
->timer
, jiffies
+ msecs_to_jiffies(1));
1524 spin_unlock_irqrestore (&dum
->lock
, flags
);
1527 /*-------------------------------------------------------------------------*/
1529 #define PORT_C_MASK \
1530 ((USB_PORT_STAT_C_CONNECTION \
1531 | USB_PORT_STAT_C_ENABLE \
1532 | USB_PORT_STAT_C_SUSPEND \
1533 | USB_PORT_STAT_C_OVERCURRENT \
1534 | USB_PORT_STAT_C_RESET) << 16)
1536 static int dummy_hub_status (struct usb_hcd
*hcd
, char *buf
)
1539 unsigned long flags
;
1542 dum
= hcd_to_dummy (hcd
);
1544 spin_lock_irqsave (&dum
->lock
, flags
);
1545 if (!test_bit(HCD_FLAG_HW_ACCESSIBLE
, &hcd
->flags
))
1548 if (dum
->resuming
&& time_after_eq (jiffies
, dum
->re_timeout
)) {
1549 dum
->port_status
|= (USB_PORT_STAT_C_SUSPEND
<< 16);
1550 dum
->port_status
&= ~USB_PORT_STAT_SUSPEND
;
1551 set_link_state (dum
);
1554 if ((dum
->port_status
& PORT_C_MASK
) != 0) {
1556 dev_dbg (dummy_dev(dum
), "port status 0x%08x has changes\n",
1559 if (dum
->rh_state
== DUMMY_RH_SUSPENDED
)
1560 usb_hcd_resume_root_hub (hcd
);
1563 spin_unlock_irqrestore (&dum
->lock
, flags
);
1568 hub_descriptor (struct usb_hub_descriptor
*desc
)
1570 memset (desc
, 0, sizeof *desc
);
1571 desc
->bDescriptorType
= 0x29;
1572 desc
->bDescLength
= 9;
1573 desc
->wHubCharacteristics
= cpu_to_le16(0x0001);
1574 desc
->bNbrPorts
= 1;
1575 desc
->bitmap
[0] = 0xff;
1576 desc
->bitmap
[1] = 0xff;
1579 static int dummy_hub_control (
1580 struct usb_hcd
*hcd
,
1589 unsigned long flags
;
1591 if (!test_bit(HCD_FLAG_HW_ACCESSIBLE
, &hcd
->flags
))
1594 dum
= hcd_to_dummy (hcd
);
1595 spin_lock_irqsave (&dum
->lock
, flags
);
1597 case ClearHubFeature
:
1599 case ClearPortFeature
:
1601 case USB_PORT_FEAT_SUSPEND
:
1602 if (dum
->port_status
& USB_PORT_STAT_SUSPEND
) {
1603 /* 20msec resume signaling */
1605 dum
->re_timeout
= jiffies
+
1606 msecs_to_jiffies(20);
1609 case USB_PORT_FEAT_POWER
:
1610 if (dum
->port_status
& USB_PORT_STAT_POWER
)
1611 dev_dbg (dummy_dev(dum
), "power-off\n");
1614 dum
->port_status
&= ~(1 << wValue
);
1615 set_link_state (dum
);
1618 case GetHubDescriptor
:
1619 hub_descriptor ((struct usb_hub_descriptor
*) buf
);
1622 *(__le32
*) buf
= cpu_to_le32 (0);
1628 /* whoever resets or resumes must GetPortStatus to
1631 if (dum
->resuming
&&
1632 time_after_eq (jiffies
, dum
->re_timeout
)) {
1633 dum
->port_status
|= (USB_PORT_STAT_C_SUSPEND
<< 16);
1634 dum
->port_status
&= ~USB_PORT_STAT_SUSPEND
;
1636 if ((dum
->port_status
& USB_PORT_STAT_RESET
) != 0 &&
1637 time_after_eq (jiffies
, dum
->re_timeout
)) {
1638 dum
->port_status
|= (USB_PORT_STAT_C_RESET
<< 16);
1639 dum
->port_status
&= ~USB_PORT_STAT_RESET
;
1641 dum
->port_status
|= USB_PORT_STAT_ENABLE
;
1642 /* give it the best speed we agree on */
1643 dum
->gadget
.speed
= dum
->driver
->speed
;
1644 dum
->gadget
.ep0
->maxpacket
= 64;
1645 switch (dum
->gadget
.speed
) {
1646 case USB_SPEED_HIGH
:
1648 USB_PORT_STAT_HIGH_SPEED
;
1651 dum
->gadget
.ep0
->maxpacket
= 8;
1653 USB_PORT_STAT_LOW_SPEED
;
1656 dum
->gadget
.speed
= USB_SPEED_FULL
;
1661 set_link_state (dum
);
1662 ((__le16
*) buf
)[0] = cpu_to_le16 (dum
->port_status
);
1663 ((__le16
*) buf
)[1] = cpu_to_le16 (dum
->port_status
>> 16);
1668 case SetPortFeature
:
1670 case USB_PORT_FEAT_SUSPEND
:
1672 dum
->port_status
|= USB_PORT_STAT_SUSPEND
;
1674 /* HNP would happen here; for now we
1675 * assume b_bus_req is always true.
1677 set_link_state (dum
);
1678 if (((1 << USB_DEVICE_B_HNP_ENABLE
)
1679 & dum
->devstatus
) != 0)
1680 dev_dbg (dummy_dev(dum
),
1684 case USB_PORT_FEAT_POWER
:
1685 dum
->port_status
|= USB_PORT_STAT_POWER
;
1686 set_link_state (dum
);
1688 case USB_PORT_FEAT_RESET
:
1689 /* if it's already enabled, disable */
1690 dum
->port_status
&= ~(USB_PORT_STAT_ENABLE
1691 | USB_PORT_STAT_LOW_SPEED
1692 | USB_PORT_STAT_HIGH_SPEED
);
1694 /* 50msec reset signaling */
1695 dum
->re_timeout
= jiffies
+ msecs_to_jiffies(50);
1698 if ((dum
->port_status
& USB_PORT_STAT_POWER
) != 0) {
1699 dum
->port_status
|= (1 << wValue
);
1700 set_link_state (dum
);
1706 dev_dbg (dummy_dev(dum
),
1707 "hub control req%04x v%04x i%04x l%d\n",
1708 typeReq
, wValue
, wIndex
, wLength
);
1710 /* "protocol stall" on error */
1713 spin_unlock_irqrestore (&dum
->lock
, flags
);
1715 if ((dum
->port_status
& PORT_C_MASK
) != 0)
1716 usb_hcd_poll_rh_status (hcd
);
1720 static int dummy_bus_suspend (struct usb_hcd
*hcd
)
1722 struct dummy
*dum
= hcd_to_dummy (hcd
);
1724 dev_dbg (&hcd
->self
.root_hub
->dev
, "%s\n", __func__
);
1726 spin_lock_irq (&dum
->lock
);
1727 dum
->rh_state
= DUMMY_RH_SUSPENDED
;
1728 set_link_state (dum
);
1729 hcd
->state
= HC_STATE_SUSPENDED
;
1730 spin_unlock_irq (&dum
->lock
);
1734 static int dummy_bus_resume (struct usb_hcd
*hcd
)
1736 struct dummy
*dum
= hcd_to_dummy (hcd
);
1739 dev_dbg (&hcd
->self
.root_hub
->dev
, "%s\n", __func__
);
1741 spin_lock_irq (&dum
->lock
);
1742 if (!test_bit(HCD_FLAG_HW_ACCESSIBLE
, &hcd
->flags
)) {
1745 dum
->rh_state
= DUMMY_RH_RUNNING
;
1746 set_link_state (dum
);
1747 if (!list_empty(&dum
->urbp_list
))
1748 mod_timer (&dum
->timer
, jiffies
);
1749 hcd
->state
= HC_STATE_RUNNING
;
1751 spin_unlock_irq (&dum
->lock
);
1755 /*-------------------------------------------------------------------------*/
1757 static inline ssize_t
1758 show_urb (char *buf
, size_t size
, struct urb
*urb
)
1760 int ep
= usb_pipeendpoint (urb
->pipe
);
1762 return snprintf (buf
, size
,
1763 "urb/%p %s ep%d%s%s len %d/%d\n",
1766 switch (urb
->dev
->speed
) {
1767 case USB_SPEED_LOW
: s
= "ls"; break;
1768 case USB_SPEED_FULL
: s
= "fs"; break;
1769 case USB_SPEED_HIGH
: s
= "hs"; break;
1770 default: s
= "?"; break;
1772 ep
, ep
? (usb_pipein (urb
->pipe
) ? "in" : "out") : "",
1774 switch (usb_pipetype (urb
->pipe
)) { \
1775 case PIPE_CONTROL
: s
= ""; break; \
1776 case PIPE_BULK
: s
= "-bulk"; break; \
1777 case PIPE_INTERRUPT
: s
= "-int"; break; \
1778 default: s
= "-iso"; break; \
1780 urb
->actual_length
, urb
->transfer_buffer_length
);
1784 show_urbs (struct device
*dev
, struct device_attribute
*attr
, char *buf
)
1786 struct usb_hcd
*hcd
= dev_get_drvdata (dev
);
1787 struct dummy
*dum
= hcd_to_dummy (hcd
);
1790 unsigned long flags
;
1792 spin_lock_irqsave (&dum
->lock
, flags
);
1793 list_for_each_entry (urbp
, &dum
->urbp_list
, urbp_list
) {
1796 temp
= show_urb (buf
, PAGE_SIZE
- size
, urbp
->urb
);
1800 spin_unlock_irqrestore (&dum
->lock
, flags
);
1804 static DEVICE_ATTR (urbs
, S_IRUGO
, show_urbs
, NULL
);
1806 static int dummy_start (struct usb_hcd
*hcd
)
1810 dum
= hcd_to_dummy (hcd
);
1813 * MASTER side init ... we emulate a root hub that'll only ever
1814 * talk to one device (the slave side). Also appears in sysfs,
1815 * just like more familiar pci-based HCDs.
1817 spin_lock_init (&dum
->lock
);
1818 init_timer (&dum
->timer
);
1819 dum
->timer
.function
= dummy_timer
;
1820 dum
->timer
.data
= (unsigned long) dum
;
1821 dum
->rh_state
= DUMMY_RH_RUNNING
;
1823 INIT_LIST_HEAD (&dum
->urbp_list
);
1825 hcd
->power_budget
= POWER_BUDGET
;
1826 hcd
->state
= HC_STATE_RUNNING
;
1827 hcd
->uses_new_polling
= 1;
1829 #ifdef CONFIG_USB_OTG
1830 hcd
->self
.otg_port
= 1;
1833 /* FIXME 'urbs' should be a per-device thing, maybe in usbcore */
1834 return device_create_file (dummy_dev(dum
), &dev_attr_urbs
);
1837 static void dummy_stop (struct usb_hcd
*hcd
)
1841 dum
= hcd_to_dummy (hcd
);
1843 device_remove_file (dummy_dev(dum
), &dev_attr_urbs
);
1844 usb_gadget_unregister_driver (dum
->driver
);
1845 dev_info (dummy_dev(dum
), "stopped\n");
1848 /*-------------------------------------------------------------------------*/
1850 static int dummy_h_get_frame (struct usb_hcd
*hcd
)
1852 return dummy_g_get_frame (NULL
);
1855 static const struct hc_driver dummy_hcd
= {
1856 .description
= (char *) driver_name
,
1857 .product_desc
= "Dummy host controller",
1858 .hcd_priv_size
= sizeof(struct dummy
),
1862 .start
= dummy_start
,
1865 .urb_enqueue
= dummy_urb_enqueue
,
1866 .urb_dequeue
= dummy_urb_dequeue
,
1868 .get_frame_number
= dummy_h_get_frame
,
1870 .hub_status_data
= dummy_hub_status
,
1871 .hub_control
= dummy_hub_control
,
1872 .bus_suspend
= dummy_bus_suspend
,
1873 .bus_resume
= dummy_bus_resume
,
1876 static int dummy_hcd_probe(struct platform_device
*pdev
)
1878 struct usb_hcd
*hcd
;
1881 dev_info(&pdev
->dev
, "%s, driver " DRIVER_VERSION
"\n", driver_desc
);
1883 hcd
= usb_create_hcd(&dummy_hcd
, &pdev
->dev
, dev_name(&pdev
->dev
));
1886 the_controller
= hcd_to_dummy (hcd
);
1888 retval
= usb_add_hcd(hcd
, 0, 0);
1891 the_controller
= NULL
;
1896 static int dummy_hcd_remove (struct platform_device
*pdev
)
1898 struct usb_hcd
*hcd
;
1900 hcd
= platform_get_drvdata (pdev
);
1901 usb_remove_hcd (hcd
);
1903 the_controller
= NULL
;
1907 static int dummy_hcd_suspend (struct platform_device
*pdev
, pm_message_t state
)
1909 struct usb_hcd
*hcd
;
1913 dev_dbg (&pdev
->dev
, "%s\n", __func__
);
1915 hcd
= platform_get_drvdata (pdev
);
1916 dum
= hcd_to_dummy (hcd
);
1917 if (dum
->rh_state
== DUMMY_RH_RUNNING
) {
1918 dev_warn(&pdev
->dev
, "Root hub isn't suspended!\n");
1921 clear_bit(HCD_FLAG_HW_ACCESSIBLE
, &hcd
->flags
);
1925 static int dummy_hcd_resume (struct platform_device
*pdev
)
1927 struct usb_hcd
*hcd
;
1929 dev_dbg (&pdev
->dev
, "%s\n", __func__
);
1931 hcd
= platform_get_drvdata (pdev
);
1932 set_bit(HCD_FLAG_HW_ACCESSIBLE
, &hcd
->flags
);
1933 usb_hcd_poll_rh_status (hcd
);
1937 static struct platform_driver dummy_hcd_driver
= {
1938 .probe
= dummy_hcd_probe
,
1939 .remove
= dummy_hcd_remove
,
1940 .suspend
= dummy_hcd_suspend
,
1941 .resume
= dummy_hcd_resume
,
1943 .name
= (char *) driver_name
,
1944 .owner
= THIS_MODULE
,
1948 /*-------------------------------------------------------------------------*/
1950 static struct platform_device
*the_udc_pdev
;
1951 static struct platform_device
*the_hcd_pdev
;
1953 static int __init
init (void)
1955 int retval
= -ENOMEM
;
1957 if (usb_disabled ())
1960 the_hcd_pdev
= platform_device_alloc(driver_name
, -1);
1963 the_udc_pdev
= platform_device_alloc(gadget_name
, -1);
1967 retval
= platform_driver_register(&dummy_hcd_driver
);
1969 goto err_register_hcd_driver
;
1970 retval
= platform_driver_register(&dummy_udc_driver
);
1972 goto err_register_udc_driver
;
1974 retval
= platform_device_add(the_hcd_pdev
);
1977 retval
= platform_device_add(the_udc_pdev
);
1983 platform_device_del(the_hcd_pdev
);
1985 platform_driver_unregister(&dummy_udc_driver
);
1986 err_register_udc_driver
:
1987 platform_driver_unregister(&dummy_hcd_driver
);
1988 err_register_hcd_driver
:
1989 platform_device_put(the_udc_pdev
);
1991 platform_device_put(the_hcd_pdev
);
1996 static void __exit
cleanup (void)
1998 platform_device_unregister(the_udc_pdev
);
1999 platform_device_unregister(the_hcd_pdev
);
2000 platform_driver_unregister(&dummy_udc_driver
);
2001 platform_driver_unregister(&dummy_hcd_driver
);
2003 module_exit (cleanup
);