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
:
431 case USB_ENDPOINT_XFER_ISOC
:
434 case USB_ENDPOINT_XFER_INT
:
443 /* at this point real hardware should be NAKing transfers
444 * to that endpoint, until a buffer is queued to it.
446 ep
->halted
= ep
->wedged
= 0;
452 static int dummy_disable (struct usb_ep
*_ep
)
459 ep
= usb_ep_to_dummy_ep (_ep
);
460 if (!_ep
|| !ep
->desc
|| _ep
->name
== ep0name
)
462 dum
= ep_to_dummy (ep
);
464 spin_lock_irqsave (&dum
->lock
, flags
);
468 spin_unlock_irqrestore (&dum
->lock
, flags
);
470 dev_dbg (udc_dev(dum
), "disabled %s\n", _ep
->name
);
474 static struct usb_request
*
475 dummy_alloc_request (struct usb_ep
*_ep
, gfp_t mem_flags
)
478 struct dummy_request
*req
;
482 ep
= usb_ep_to_dummy_ep (_ep
);
484 req
= kzalloc(sizeof(*req
), mem_flags
);
487 INIT_LIST_HEAD (&req
->queue
);
492 dummy_free_request (struct usb_ep
*_ep
, struct usb_request
*_req
)
495 struct dummy_request
*req
;
497 ep
= usb_ep_to_dummy_ep (_ep
);
498 if (!ep
|| !_req
|| (!ep
->desc
&& _ep
->name
!= ep0name
))
501 req
= usb_request_to_dummy_request (_req
);
502 WARN_ON (!list_empty (&req
->queue
));
507 fifo_complete (struct usb_ep
*ep
, struct usb_request
*req
)
512 dummy_queue (struct usb_ep
*_ep
, struct usb_request
*_req
,
516 struct dummy_request
*req
;
520 req
= usb_request_to_dummy_request (_req
);
521 if (!_req
|| !list_empty (&req
->queue
) || !_req
->complete
)
524 ep
= usb_ep_to_dummy_ep (_ep
);
525 if (!_ep
|| (!ep
->desc
&& _ep
->name
!= ep0name
))
528 dum
= ep_to_dummy (ep
);
529 if (!dum
->driver
|| !is_enabled (dum
))
533 dev_dbg (udc_dev(dum
), "ep %p queue req %p to %s, len %d buf %p\n",
534 ep
, _req
, _ep
->name
, _req
->length
, _req
->buf
);
537 _req
->status
= -EINPROGRESS
;
539 spin_lock_irqsave (&dum
->lock
, flags
);
541 /* implement an emulated single-request FIFO */
542 if (ep
->desc
&& (ep
->desc
->bEndpointAddress
& USB_DIR_IN
) &&
543 list_empty (&dum
->fifo_req
.queue
) &&
544 list_empty (&ep
->queue
) &&
545 _req
->length
<= FIFO_SIZE
) {
546 req
= &dum
->fifo_req
;
548 req
->req
.buf
= dum
->fifo_buf
;
549 memcpy (dum
->fifo_buf
, _req
->buf
, _req
->length
);
550 req
->req
.context
= dum
;
551 req
->req
.complete
= fifo_complete
;
553 list_add_tail(&req
->queue
, &ep
->queue
);
554 spin_unlock (&dum
->lock
);
555 _req
->actual
= _req
->length
;
557 _req
->complete (_ep
, _req
);
558 spin_lock (&dum
->lock
);
560 list_add_tail(&req
->queue
, &ep
->queue
);
561 spin_unlock_irqrestore (&dum
->lock
, flags
);
563 /* real hardware would likely enable transfers here, in case
564 * it'd been left NAKing.
569 static int dummy_dequeue (struct usb_ep
*_ep
, struct usb_request
*_req
)
573 int retval
= -EINVAL
;
575 struct dummy_request
*req
= NULL
;
579 ep
= usb_ep_to_dummy_ep (_ep
);
580 dum
= ep_to_dummy (ep
);
585 local_irq_save (flags
);
586 spin_lock (&dum
->lock
);
587 list_for_each_entry (req
, &ep
->queue
, queue
) {
588 if (&req
->req
== _req
) {
589 list_del_init (&req
->queue
);
590 _req
->status
= -ECONNRESET
;
595 spin_unlock (&dum
->lock
);
598 dev_dbg (udc_dev(dum
),
599 "dequeued req %p from %s, len %d buf %p\n",
600 req
, _ep
->name
, _req
->length
, _req
->buf
);
601 _req
->complete (_ep
, _req
);
603 local_irq_restore (flags
);
608 dummy_set_halt_and_wedge(struct usb_ep
*_ep
, int value
, int wedged
)
615 ep
= usb_ep_to_dummy_ep (_ep
);
616 dum
= ep_to_dummy (ep
);
620 ep
->halted
= ep
->wedged
= 0;
621 else if (ep
->desc
&& (ep
->desc
->bEndpointAddress
& USB_DIR_IN
) &&
622 !list_empty (&ep
->queue
))
629 /* FIXME clear emulated data toggle too */
634 dummy_set_halt(struct usb_ep
*_ep
, int value
)
636 return dummy_set_halt_and_wedge(_ep
, value
, 0);
639 static int dummy_set_wedge(struct usb_ep
*_ep
)
641 if (!_ep
|| _ep
->name
== ep0name
)
643 return dummy_set_halt_and_wedge(_ep
, 1, 1);
646 static const struct usb_ep_ops dummy_ep_ops
= {
647 .enable
= dummy_enable
,
648 .disable
= dummy_disable
,
650 .alloc_request
= dummy_alloc_request
,
651 .free_request
= dummy_free_request
,
653 .queue
= dummy_queue
,
654 .dequeue
= dummy_dequeue
,
656 .set_halt
= dummy_set_halt
,
657 .set_wedge
= dummy_set_wedge
,
660 /*-------------------------------------------------------------------------*/
662 /* there are both host and device side versions of this call ... */
663 static int dummy_g_get_frame (struct usb_gadget
*_gadget
)
667 do_gettimeofday (&tv
);
668 return tv
.tv_usec
/ 1000;
671 static int dummy_wakeup (struct usb_gadget
*_gadget
)
675 dum
= gadget_to_dummy (_gadget
);
676 if (!(dum
->devstatus
& ( (1 << USB_DEVICE_B_HNP_ENABLE
)
677 | (1 << USB_DEVICE_REMOTE_WAKEUP
))))
679 if ((dum
->port_status
& USB_PORT_STAT_CONNECTION
) == 0)
681 if ((dum
->port_status
& USB_PORT_STAT_SUSPEND
) == 0 &&
682 dum
->rh_state
!= DUMMY_RH_SUSPENDED
)
685 /* FIXME: What if the root hub is suspended but the port isn't? */
687 /* hub notices our request, issues downstream resume, etc */
689 dum
->re_timeout
= jiffies
+ msecs_to_jiffies(20);
690 mod_timer (&dummy_to_hcd (dum
)->rh_timer
, dum
->re_timeout
);
694 static int dummy_set_selfpowered (struct usb_gadget
*_gadget
, int value
)
698 dum
= gadget_to_dummy (_gadget
);
700 dum
->devstatus
|= (1 << USB_DEVICE_SELF_POWERED
);
702 dum
->devstatus
&= ~(1 << USB_DEVICE_SELF_POWERED
);
706 static int dummy_pullup (struct usb_gadget
*_gadget
, int value
)
711 dum
= gadget_to_dummy (_gadget
);
712 spin_lock_irqsave (&dum
->lock
, flags
);
713 dum
->pullup
= (value
!= 0);
714 set_link_state (dum
);
715 spin_unlock_irqrestore (&dum
->lock
, flags
);
717 usb_hcd_poll_rh_status (dummy_to_hcd (dum
));
721 static int dummy_udc_start(struct usb_gadget_driver
*driver
,
722 int (*bind
)(struct usb_gadget
*));
723 static int dummy_udc_stop(struct usb_gadget_driver
*driver
);
725 static const struct usb_gadget_ops dummy_ops
= {
726 .get_frame
= dummy_g_get_frame
,
727 .wakeup
= dummy_wakeup
,
728 .set_selfpowered
= dummy_set_selfpowered
,
729 .pullup
= dummy_pullup
,
730 .start
= dummy_udc_start
,
731 .stop
= dummy_udc_stop
,
734 /*-------------------------------------------------------------------------*/
736 /* "function" sysfs attribute */
738 show_function (struct device
*dev
, struct device_attribute
*attr
, char *buf
)
740 struct dummy
*dum
= gadget_dev_to_dummy (dev
);
742 if (!dum
->driver
|| !dum
->driver
->function
)
744 return scnprintf (buf
, PAGE_SIZE
, "%s\n", dum
->driver
->function
);
746 static DEVICE_ATTR (function
, S_IRUGO
, show_function
, NULL
);
748 /*-------------------------------------------------------------------------*/
751 * Driver registration/unregistration.
753 * This is basically hardware-specific; there's usually only one real USB
754 * device (not host) controller since that's how USB devices are intended
755 * to work. So most implementations of these api calls will rely on the
756 * fact that only one driver will ever bind to the hardware. But curious
757 * hardware can be built with discrete components, so the gadget API doesn't
758 * require that assumption.
760 * For this emulator, it might be convenient to create a usb slave device
761 * for each driver that registers: just add to a big root hub.
764 static int dummy_udc_start(struct usb_gadget_driver
*driver
,
765 int (*bind
)(struct usb_gadget
*))
767 struct dummy
*dum
= the_controller
;
774 if (!bind
|| !driver
->setup
|| driver
->speed
== USB_SPEED_UNKNOWN
)
778 * SLAVE side init ... the layer above hardware, which
779 * can't enumerate without help from the driver we're binding.
784 INIT_LIST_HEAD (&dum
->gadget
.ep_list
);
785 for (i
= 0; i
< DUMMY_ENDPOINTS
; i
++) {
786 struct dummy_ep
*ep
= &dum
->ep
[i
];
790 ep
->ep
.name
= ep_name
[i
];
791 ep
->ep
.ops
= &dummy_ep_ops
;
792 list_add_tail (&ep
->ep
.ep_list
, &dum
->gadget
.ep_list
);
793 ep
->halted
= ep
->wedged
= ep
->already_seen
=
795 ep
->ep
.maxpacket
= ~0;
796 ep
->last_io
= jiffies
;
797 ep
->gadget
= &dum
->gadget
;
799 INIT_LIST_HEAD (&ep
->queue
);
802 dum
->gadget
.ep0
= &dum
->ep
[0].ep
;
803 dum
->ep
[0].ep
.maxpacket
= 64;
804 list_del_init (&dum
->ep
[0].ep
.ep_list
);
805 INIT_LIST_HEAD(&dum
->fifo_req
.queue
);
807 driver
->driver
.bus
= NULL
;
808 dum
->driver
= driver
;
809 dum
->gadget
.dev
.driver
= &driver
->driver
;
810 dev_dbg (udc_dev(dum
), "binding gadget driver '%s'\n",
811 driver
->driver
.name
);
812 retval
= bind(&dum
->gadget
);
815 dum
->gadget
.dev
.driver
= NULL
;
819 /* khubd will enumerate this in a while */
820 spin_lock_irq (&dum
->lock
);
822 set_link_state (dum
);
823 spin_unlock_irq (&dum
->lock
);
825 usb_hcd_poll_rh_status (dummy_to_hcd (dum
));
829 static int dummy_udc_stop(struct usb_gadget_driver
*driver
)
831 struct dummy
*dum
= the_controller
;
836 if (!driver
|| driver
!= dum
->driver
|| !driver
->unbind
)
839 dev_dbg (udc_dev(dum
), "unregister gadget driver '%s'\n",
840 driver
->driver
.name
);
842 spin_lock_irqsave (&dum
->lock
, flags
);
844 set_link_state (dum
);
845 spin_unlock_irqrestore (&dum
->lock
, flags
);
847 driver
->unbind (&dum
->gadget
);
848 dum
->gadget
.dev
.driver
= NULL
;
851 spin_lock_irqsave (&dum
->lock
, flags
);
853 set_link_state (dum
);
854 spin_unlock_irqrestore (&dum
->lock
, flags
);
856 usb_hcd_poll_rh_status (dummy_to_hcd (dum
));
862 /* just declare this in any driver that really need it */
863 extern int net2280_set_fifo_mode (struct usb_gadget
*gadget
, int mode
);
865 int net2280_set_fifo_mode (struct usb_gadget
*gadget
, int mode
)
869 EXPORT_SYMBOL (net2280_set_fifo_mode
);
872 /* The gadget structure is stored inside the hcd structure and will be
873 * released along with it. */
875 dummy_gadget_release (struct device
*dev
)
877 struct dummy
*dum
= gadget_dev_to_dummy (dev
);
879 usb_put_hcd (dummy_to_hcd (dum
));
882 static int dummy_udc_probe (struct platform_device
*pdev
)
884 struct dummy
*dum
= the_controller
;
887 usb_get_hcd(dummy_to_hcd(dum
));
889 dum
->gadget
.name
= gadget_name
;
890 dum
->gadget
.ops
= &dummy_ops
;
891 dum
->gadget
.is_dualspeed
= 1;
893 /* maybe claim OTG support, though we won't complete HNP */
894 dum
->gadget
.is_otg
= (dummy_to_hcd(dum
)->self
.otg_port
!= 0);
896 dev_set_name(&dum
->gadget
.dev
, "gadget");
897 dum
->gadget
.dev
.parent
= &pdev
->dev
;
898 dum
->gadget
.dev
.release
= dummy_gadget_release
;
899 rc
= device_register (&dum
->gadget
.dev
);
901 put_device(&dum
->gadget
.dev
);
905 rc
= usb_add_gadget_udc(&pdev
->dev
, &dum
->gadget
);
909 rc
= device_create_file (&dum
->gadget
.dev
, &dev_attr_function
);
912 platform_set_drvdata(pdev
, dum
);
916 usb_del_gadget_udc(&dum
->gadget
);
918 device_unregister(&dum
->gadget
.dev
);
922 static int dummy_udc_remove (struct platform_device
*pdev
)
924 struct dummy
*dum
= platform_get_drvdata (pdev
);
926 usb_del_gadget_udc(&dum
->gadget
);
927 platform_set_drvdata (pdev
, NULL
);
928 device_remove_file (&dum
->gadget
.dev
, &dev_attr_function
);
929 device_unregister (&dum
->gadget
.dev
);
933 static int dummy_udc_suspend (struct platform_device
*pdev
, pm_message_t state
)
935 struct dummy
*dum
= platform_get_drvdata(pdev
);
937 dev_dbg (&pdev
->dev
, "%s\n", __func__
);
938 spin_lock_irq (&dum
->lock
);
939 dum
->udc_suspended
= 1;
940 set_link_state (dum
);
941 spin_unlock_irq (&dum
->lock
);
943 usb_hcd_poll_rh_status (dummy_to_hcd (dum
));
947 static int dummy_udc_resume (struct platform_device
*pdev
)
949 struct dummy
*dum
= platform_get_drvdata(pdev
);
951 dev_dbg (&pdev
->dev
, "%s\n", __func__
);
952 spin_lock_irq (&dum
->lock
);
953 dum
->udc_suspended
= 0;
954 set_link_state (dum
);
955 spin_unlock_irq (&dum
->lock
);
957 usb_hcd_poll_rh_status (dummy_to_hcd (dum
));
961 static struct platform_driver dummy_udc_driver
= {
962 .probe
= dummy_udc_probe
,
963 .remove
= dummy_udc_remove
,
964 .suspend
= dummy_udc_suspend
,
965 .resume
= dummy_udc_resume
,
967 .name
= (char *) gadget_name
,
968 .owner
= THIS_MODULE
,
972 /*-------------------------------------------------------------------------*/
974 /* MASTER/HOST SIDE DRIVER
976 * this uses the hcd framework to hook up to host side drivers.
977 * its root hub will only have one device, otherwise it acts like
978 * a normal host controller.
980 * when urbs are queued, they're just stuck on a list that we
981 * scan in a timer callback. that callback connects writes from
982 * the host with reads from the device, and so on, based on the
986 static int dummy_urb_enqueue (
996 if (!urb
->transfer_buffer
&& urb
->transfer_buffer_length
)
999 urbp
= kmalloc (sizeof *urbp
, mem_flags
);
1004 dum
= hcd_to_dummy (hcd
);
1005 spin_lock_irqsave (&dum
->lock
, flags
);
1006 rc
= usb_hcd_link_urb_to_ep(hcd
, urb
);
1013 dum
->udev
= urb
->dev
;
1014 usb_get_dev (dum
->udev
);
1015 } else if (unlikely (dum
->udev
!= urb
->dev
))
1016 dev_err (dummy_dev(dum
), "usb_device address has changed!\n");
1018 list_add_tail (&urbp
->urbp_list
, &dum
->urbp_list
);
1020 if (usb_pipetype (urb
->pipe
) == PIPE_CONTROL
)
1021 urb
->error_count
= 1; /* mark as a new urb */
1023 /* kick the scheduler, it'll do the rest */
1024 if (!timer_pending (&dum
->timer
))
1025 mod_timer (&dum
->timer
, jiffies
+ 1);
1028 spin_unlock_irqrestore(&dum
->lock
, flags
);
1032 static int dummy_urb_dequeue(struct usb_hcd
*hcd
, struct urb
*urb
, int status
)
1035 unsigned long flags
;
1038 /* giveback happens automatically in timer callback,
1039 * so make sure the callback happens */
1040 dum
= hcd_to_dummy (hcd
);
1041 spin_lock_irqsave (&dum
->lock
, flags
);
1043 rc
= usb_hcd_check_unlink_urb(hcd
, urb
, status
);
1044 if (!rc
&& dum
->rh_state
!= DUMMY_RH_RUNNING
&&
1045 !list_empty(&dum
->urbp_list
))
1046 mod_timer (&dum
->timer
, jiffies
);
1048 spin_unlock_irqrestore (&dum
->lock
, flags
);
1052 /* transfer up to a frame's worth; caller must own lock */
1054 transfer(struct dummy
*dum
, struct urb
*urb
, struct dummy_ep
*ep
, int limit
,
1057 struct dummy_request
*req
;
1060 /* if there's no request queued, the device is NAKing; return */
1061 list_for_each_entry (req
, &ep
->queue
, queue
) {
1062 unsigned host_len
, dev_len
, len
;
1063 int is_short
, to_host
;
1066 /* 1..N packets of ep->ep.maxpacket each ... the last one
1067 * may be short (including zero length).
1069 * writer can send a zlp explicitly (length 0) or implicitly
1070 * (length mod maxpacket zero, and 'zero' flag); they always
1073 host_len
= urb
->transfer_buffer_length
- urb
->actual_length
;
1074 dev_len
= req
->req
.length
- req
->req
.actual
;
1075 len
= min (host_len
, dev_len
);
1077 /* FIXME update emulated data toggle too */
1079 to_host
= usb_pipein (urb
->pipe
);
1080 if (unlikely (len
== 0))
1085 /* not enough bandwidth left? */
1086 if (limit
< ep
->ep
.maxpacket
&& limit
< len
)
1088 len
= min (len
, (unsigned) limit
);
1092 /* use an extra pass for the final short packet */
1093 if (len
> ep
->ep
.maxpacket
) {
1095 len
-= (len
% ep
->ep
.maxpacket
);
1097 is_short
= (len
% ep
->ep
.maxpacket
) != 0;
1099 /* else transfer packet(s) */
1100 ubuf
= urb
->transfer_buffer
+ urb
->actual_length
;
1101 rbuf
= req
->req
.buf
+ req
->req
.actual
;
1103 memcpy (ubuf
, rbuf
, len
);
1105 memcpy (rbuf
, ubuf
, len
);
1106 ep
->last_io
= jiffies
;
1109 urb
->actual_length
+= len
;
1110 req
->req
.actual
+= len
;
1113 /* short packets terminate, maybe with overflow/underflow.
1114 * it's only really an error to write too much.
1116 * partially filling a buffer optionally blocks queue advances
1117 * (so completion handlers can clean up the queue) but we don't
1118 * need to emulate such data-in-flight.
1121 if (host_len
== dev_len
) {
1122 req
->req
.status
= 0;
1124 } else if (to_host
) {
1125 req
->req
.status
= 0;
1126 if (dev_len
> host_len
)
1127 *status
= -EOVERFLOW
;
1130 } else if (!to_host
) {
1132 if (host_len
> dev_len
)
1133 req
->req
.status
= -EOVERFLOW
;
1135 req
->req
.status
= 0;
1138 /* many requests terminate without a short packet */
1140 if (req
->req
.length
== req
->req
.actual
1142 req
->req
.status
= 0;
1143 if (urb
->transfer_buffer_length
== urb
->actual_length
1144 && !(urb
->transfer_flags
1149 /* device side completion --> continuable */
1150 if (req
->req
.status
!= -EINPROGRESS
) {
1151 list_del_init (&req
->queue
);
1153 spin_unlock (&dum
->lock
);
1154 req
->req
.complete (&ep
->ep
, &req
->req
);
1155 spin_lock (&dum
->lock
);
1157 /* requests might have been unlinked... */
1161 /* host side completion --> terminate */
1162 if (*status
!= -EINPROGRESS
)
1165 /* rescan to continue with any other queued i/o */
1172 static int periodic_bytes (struct dummy
*dum
, struct dummy_ep
*ep
)
1174 int limit
= ep
->ep
.maxpacket
;
1176 if (dum
->gadget
.speed
== USB_SPEED_HIGH
) {
1179 /* high bandwidth mode */
1180 tmp
= le16_to_cpu(ep
->desc
->wMaxPacketSize
);
1181 tmp
= (tmp
>> 11) & 0x03;
1182 tmp
*= 8 /* applies to entire frame */;
1183 limit
+= limit
* tmp
;
1188 #define is_active(dum) ((dum->port_status & \
1189 (USB_PORT_STAT_CONNECTION | USB_PORT_STAT_ENABLE | \
1190 USB_PORT_STAT_SUSPEND)) \
1191 == (USB_PORT_STAT_CONNECTION | USB_PORT_STAT_ENABLE))
1193 static struct dummy_ep
*find_endpoint (struct dummy
*dum
, u8 address
)
1197 if (!is_active (dum
))
1199 if ((address
& ~USB_DIR_IN
) == 0)
1200 return &dum
->ep
[0];
1201 for (i
= 1; i
< DUMMY_ENDPOINTS
; i
++) {
1202 struct dummy_ep
*ep
= &dum
->ep
[i
];
1206 if (ep
->desc
->bEndpointAddress
== address
)
1214 #define Dev_Request (USB_TYPE_STANDARD | USB_RECIP_DEVICE)
1215 #define Dev_InRequest (Dev_Request | USB_DIR_IN)
1216 #define Intf_Request (USB_TYPE_STANDARD | USB_RECIP_INTERFACE)
1217 #define Intf_InRequest (Intf_Request | USB_DIR_IN)
1218 #define Ep_Request (USB_TYPE_STANDARD | USB_RECIP_ENDPOINT)
1219 #define Ep_InRequest (Ep_Request | USB_DIR_IN)
1223 * handle_control_request() - handles all control transfers
1224 * @dum: pointer to dummy (the_controller)
1225 * @urb: the urb request to handle
1226 * @setup: pointer to the setup data for a USB device control
1228 * @status: pointer to request handling status
1230 * Return 0 - if the request was handled
1231 * 1 - if the request wasn't handles
1232 * error code on error
1234 static int handle_control_request(struct dummy
*dum
, struct urb
*urb
,
1235 struct usb_ctrlrequest
*setup
,
1238 struct dummy_ep
*ep2
;
1243 w_index
= le16_to_cpu(setup
->wIndex
);
1244 w_value
= le16_to_cpu(setup
->wValue
);
1245 switch (setup
->bRequest
) {
1246 case USB_REQ_SET_ADDRESS
:
1247 if (setup
->bRequestType
!= Dev_Request
)
1249 dum
->address
= w_value
;
1251 dev_dbg(udc_dev(dum
), "set_address = %d\n",
1255 case USB_REQ_SET_FEATURE
:
1256 if (setup
->bRequestType
== Dev_Request
) {
1259 case USB_DEVICE_REMOTE_WAKEUP
:
1261 case USB_DEVICE_B_HNP_ENABLE
:
1262 dum
->gadget
.b_hnp_enable
= 1;
1264 case USB_DEVICE_A_HNP_SUPPORT
:
1265 dum
->gadget
.a_hnp_support
= 1;
1267 case USB_DEVICE_A_ALT_HNP_SUPPORT
:
1268 dum
->gadget
.a_alt_hnp_support
= 1;
1271 ret_val
= -EOPNOTSUPP
;
1274 dum
->devstatus
|= (1 << w_value
);
1277 } else if (setup
->bRequestType
== Ep_Request
) {
1279 ep2
= find_endpoint(dum
, w_index
);
1280 if (!ep2
|| ep2
->ep
.name
== ep0name
) {
1281 ret_val
= -EOPNOTSUPP
;
1289 case USB_REQ_CLEAR_FEATURE
:
1290 if (setup
->bRequestType
== Dev_Request
) {
1293 case USB_DEVICE_REMOTE_WAKEUP
:
1294 w_value
= USB_DEVICE_REMOTE_WAKEUP
;
1297 ret_val
= -EOPNOTSUPP
;
1301 dum
->devstatus
&= ~(1 << w_value
);
1304 } else if (setup
->bRequestType
== Ep_Request
) {
1306 ep2
= find_endpoint(dum
, w_index
);
1308 ret_val
= -EOPNOTSUPP
;
1317 case USB_REQ_GET_STATUS
:
1318 if (setup
->bRequestType
== Dev_InRequest
1319 || setup
->bRequestType
== Intf_InRequest
1320 || setup
->bRequestType
== Ep_InRequest
) {
1323 * device: remote wakeup, selfpowered
1324 * interface: nothing
1327 buf
= (char *)urb
->transfer_buffer
;
1328 if (urb
->transfer_buffer_length
> 0) {
1329 if (setup
->bRequestType
== Ep_InRequest
) {
1330 ep2
= find_endpoint(dum
, w_index
);
1332 ret_val
= -EOPNOTSUPP
;
1335 buf
[0] = ep2
->halted
;
1336 } else if (setup
->bRequestType
==
1338 buf
[0] = (u8
)dum
->devstatus
;
1342 if (urb
->transfer_buffer_length
> 1)
1344 urb
->actual_length
= min_t(u32
, 2,
1345 urb
->transfer_buffer_length
);
1354 /* drive both sides of the transfers; looks like irq handlers to
1355 * both drivers except the callbacks aren't in_irq().
1357 static void dummy_timer (unsigned long _dum
)
1359 struct dummy
*dum
= (struct dummy
*) _dum
;
1360 struct urbp
*urbp
, *tmp
;
1361 unsigned long flags
;
1365 /* simplistic model for one frame's bandwidth */
1366 switch (dum
->gadget
.speed
) {
1368 total
= 8/*bytes*/ * 12/*packets*/;
1370 case USB_SPEED_FULL
:
1371 total
= 64/*bytes*/ * 19/*packets*/;
1373 case USB_SPEED_HIGH
:
1374 total
= 512/*bytes*/ * 13/*packets*/ * 8/*uframes*/;
1377 dev_err (dummy_dev(dum
), "bogus device speed\n");
1381 /* FIXME if HZ != 1000 this will probably misbehave ... */
1383 /* look at each urb queued by the host side driver */
1384 spin_lock_irqsave (&dum
->lock
, flags
);
1387 dev_err (dummy_dev(dum
),
1388 "timer fired with no URBs pending?\n");
1389 spin_unlock_irqrestore (&dum
->lock
, flags
);
1393 for (i
= 0; i
< DUMMY_ENDPOINTS
; i
++) {
1396 dum
->ep
[i
].already_seen
= 0;
1400 list_for_each_entry_safe (urbp
, tmp
, &dum
->urbp_list
, urbp_list
) {
1402 struct dummy_request
*req
;
1404 struct dummy_ep
*ep
= NULL
;
1406 int status
= -EINPROGRESS
;
1411 else if (dum
->rh_state
!= DUMMY_RH_RUNNING
)
1413 type
= usb_pipetype (urb
->pipe
);
1415 /* used up this frame's non-periodic bandwidth?
1416 * FIXME there's infinite bandwidth for control and
1417 * periodic transfers ... unrealistic.
1419 if (total
<= 0 && type
== PIPE_BULK
)
1422 /* find the gadget's ep for this request (if configured) */
1423 address
= usb_pipeendpoint (urb
->pipe
);
1424 if (usb_pipein (urb
->pipe
))
1425 address
|= USB_DIR_IN
;
1426 ep
= find_endpoint(dum
, address
);
1428 /* set_configuration() disagreement */
1429 dev_dbg (dummy_dev(dum
),
1430 "no ep configured for urb %p\n",
1436 if (ep
->already_seen
)
1438 ep
->already_seen
= 1;
1439 if (ep
== &dum
->ep
[0] && urb
->error_count
) {
1440 ep
->setup_stage
= 1; /* a new urb */
1441 urb
->error_count
= 0;
1443 if (ep
->halted
&& !ep
->setup_stage
) {
1444 /* NOTE: must not be iso! */
1445 dev_dbg (dummy_dev(dum
), "ep %s halted, urb %p\n",
1450 /* FIXME make sure both ends agree on maxpacket */
1452 /* handle control requests */
1453 if (ep
== &dum
->ep
[0] && ep
->setup_stage
) {
1454 struct usb_ctrlrequest setup
;
1457 setup
= *(struct usb_ctrlrequest
*) urb
->setup_packet
;
1458 /* paranoia, in case of stale queued data */
1459 list_for_each_entry (req
, &ep
->queue
, queue
) {
1460 list_del_init (&req
->queue
);
1461 req
->req
.status
= -EOVERFLOW
;
1462 dev_dbg (udc_dev(dum
), "stale req = %p\n",
1465 spin_unlock (&dum
->lock
);
1466 req
->req
.complete (&ep
->ep
, &req
->req
);
1467 spin_lock (&dum
->lock
);
1468 ep
->already_seen
= 0;
1472 /* gadget driver never sees set_address or operations
1473 * on standard feature flags. some hardware doesn't
1476 ep
->last_io
= jiffies
;
1477 ep
->setup_stage
= 0;
1480 value
= handle_control_request(dum
, urb
, &setup
,
1483 /* gadget driver handles all other requests. block
1484 * until setup() returns; no reentrancy issues etc.
1487 spin_unlock (&dum
->lock
);
1488 value
= dum
->driver
->setup (&dum
->gadget
,
1490 spin_lock (&dum
->lock
);
1493 /* no delays (max 64KB data stage) */
1495 goto treat_control_like_bulk
;
1497 /* error, see below */
1501 if (value
!= -EOPNOTSUPP
)
1502 dev_dbg (udc_dev(dum
),
1506 urb
->actual_length
= 0;
1512 /* non-control requests */
1514 switch (usb_pipetype (urb
->pipe
)) {
1515 case PIPE_ISOCHRONOUS
:
1516 /* FIXME is it urb->interval since the last xfer?
1517 * use urb->iso_frame_desc[i].
1518 * complete whether or not ep has requests queued.
1519 * report random errors, to debug drivers.
1521 limit
= max (limit
, periodic_bytes (dum
, ep
));
1525 case PIPE_INTERRUPT
:
1526 /* FIXME is it urb->interval since the last xfer?
1527 * this almost certainly polls too fast.
1529 limit
= max (limit
, periodic_bytes (dum
, ep
));
1532 // case PIPE_BULK: case PIPE_CONTROL:
1534 treat_control_like_bulk
:
1535 ep
->last_io
= jiffies
;
1536 total
= transfer(dum
, urb
, ep
, limit
, &status
);
1540 /* incomplete transfer? */
1541 if (status
== -EINPROGRESS
)
1545 list_del (&urbp
->urbp_list
);
1548 ep
->already_seen
= ep
->setup_stage
= 0;
1550 usb_hcd_unlink_urb_from_ep(dummy_to_hcd(dum
), urb
);
1551 spin_unlock (&dum
->lock
);
1552 usb_hcd_giveback_urb(dummy_to_hcd(dum
), urb
, status
);
1553 spin_lock (&dum
->lock
);
1558 if (list_empty (&dum
->urbp_list
)) {
1559 usb_put_dev (dum
->udev
);
1561 } else if (dum
->rh_state
== DUMMY_RH_RUNNING
) {
1562 /* want a 1 msec delay here */
1563 mod_timer (&dum
->timer
, jiffies
+ msecs_to_jiffies(1));
1566 spin_unlock_irqrestore (&dum
->lock
, flags
);
1569 /*-------------------------------------------------------------------------*/
1571 #define PORT_C_MASK \
1572 ((USB_PORT_STAT_C_CONNECTION \
1573 | USB_PORT_STAT_C_ENABLE \
1574 | USB_PORT_STAT_C_SUSPEND \
1575 | USB_PORT_STAT_C_OVERCURRENT \
1576 | USB_PORT_STAT_C_RESET) << 16)
1578 static int dummy_hub_status (struct usb_hcd
*hcd
, char *buf
)
1581 unsigned long flags
;
1584 dum
= hcd_to_dummy (hcd
);
1586 spin_lock_irqsave (&dum
->lock
, flags
);
1587 if (!HCD_HW_ACCESSIBLE(hcd
))
1590 if (dum
->resuming
&& time_after_eq (jiffies
, dum
->re_timeout
)) {
1591 dum
->port_status
|= (USB_PORT_STAT_C_SUSPEND
<< 16);
1592 dum
->port_status
&= ~USB_PORT_STAT_SUSPEND
;
1593 set_link_state (dum
);
1596 if ((dum
->port_status
& PORT_C_MASK
) != 0) {
1598 dev_dbg (dummy_dev(dum
), "port status 0x%08x has changes\n",
1601 if (dum
->rh_state
== DUMMY_RH_SUSPENDED
)
1602 usb_hcd_resume_root_hub (hcd
);
1605 spin_unlock_irqrestore (&dum
->lock
, flags
);
1610 hub_descriptor (struct usb_hub_descriptor
*desc
)
1612 memset (desc
, 0, sizeof *desc
);
1613 desc
->bDescriptorType
= 0x29;
1614 desc
->bDescLength
= 9;
1615 desc
->wHubCharacteristics
= cpu_to_le16(0x0001);
1616 desc
->bNbrPorts
= 1;
1617 desc
->u
.hs
.DeviceRemovable
[0] = 0xff;
1618 desc
->u
.hs
.DeviceRemovable
[1] = 0xff;
1621 static int dummy_hub_control (
1622 struct usb_hcd
*hcd
,
1631 unsigned long flags
;
1633 if (!HCD_HW_ACCESSIBLE(hcd
))
1636 dum
= hcd_to_dummy (hcd
);
1637 spin_lock_irqsave (&dum
->lock
, flags
);
1639 case ClearHubFeature
:
1641 case ClearPortFeature
:
1643 case USB_PORT_FEAT_SUSPEND
:
1644 if (dum
->port_status
& USB_PORT_STAT_SUSPEND
) {
1645 /* 20msec resume signaling */
1647 dum
->re_timeout
= jiffies
+
1648 msecs_to_jiffies(20);
1651 case USB_PORT_FEAT_POWER
:
1652 if (dum
->port_status
& USB_PORT_STAT_POWER
)
1653 dev_dbg (dummy_dev(dum
), "power-off\n");
1656 dum
->port_status
&= ~(1 << wValue
);
1657 set_link_state (dum
);
1660 case GetHubDescriptor
:
1661 hub_descriptor ((struct usb_hub_descriptor
*) buf
);
1664 *(__le32
*) buf
= cpu_to_le32 (0);
1670 /* whoever resets or resumes must GetPortStatus to
1673 if (dum
->resuming
&&
1674 time_after_eq (jiffies
, dum
->re_timeout
)) {
1675 dum
->port_status
|= (USB_PORT_STAT_C_SUSPEND
<< 16);
1676 dum
->port_status
&= ~USB_PORT_STAT_SUSPEND
;
1678 if ((dum
->port_status
& USB_PORT_STAT_RESET
) != 0 &&
1679 time_after_eq (jiffies
, dum
->re_timeout
)) {
1680 dum
->port_status
|= (USB_PORT_STAT_C_RESET
<< 16);
1681 dum
->port_status
&= ~USB_PORT_STAT_RESET
;
1683 dum
->port_status
|= USB_PORT_STAT_ENABLE
;
1684 /* give it the best speed we agree on */
1685 dum
->gadget
.speed
= dum
->driver
->speed
;
1686 dum
->gadget
.ep0
->maxpacket
= 64;
1687 switch (dum
->gadget
.speed
) {
1688 case USB_SPEED_HIGH
:
1690 USB_PORT_STAT_HIGH_SPEED
;
1693 dum
->gadget
.ep0
->maxpacket
= 8;
1695 USB_PORT_STAT_LOW_SPEED
;
1698 dum
->gadget
.speed
= USB_SPEED_FULL
;
1703 set_link_state (dum
);
1704 ((__le16
*) buf
)[0] = cpu_to_le16 (dum
->port_status
);
1705 ((__le16
*) buf
)[1] = cpu_to_le16 (dum
->port_status
>> 16);
1710 case SetPortFeature
:
1712 case USB_PORT_FEAT_SUSPEND
:
1714 dum
->port_status
|= USB_PORT_STAT_SUSPEND
;
1716 /* HNP would happen here; for now we
1717 * assume b_bus_req is always true.
1719 set_link_state (dum
);
1720 if (((1 << USB_DEVICE_B_HNP_ENABLE
)
1721 & dum
->devstatus
) != 0)
1722 dev_dbg (dummy_dev(dum
),
1726 case USB_PORT_FEAT_POWER
:
1727 dum
->port_status
|= USB_PORT_STAT_POWER
;
1728 set_link_state (dum
);
1730 case USB_PORT_FEAT_RESET
:
1731 /* if it's already enabled, disable */
1732 dum
->port_status
&= ~(USB_PORT_STAT_ENABLE
1733 | USB_PORT_STAT_LOW_SPEED
1734 | USB_PORT_STAT_HIGH_SPEED
);
1736 /* 50msec reset signaling */
1737 dum
->re_timeout
= jiffies
+ msecs_to_jiffies(50);
1740 if ((dum
->port_status
& USB_PORT_STAT_POWER
) != 0) {
1741 dum
->port_status
|= (1 << wValue
);
1742 set_link_state (dum
);
1748 dev_dbg (dummy_dev(dum
),
1749 "hub control req%04x v%04x i%04x l%d\n",
1750 typeReq
, wValue
, wIndex
, wLength
);
1752 /* "protocol stall" on error */
1755 spin_unlock_irqrestore (&dum
->lock
, flags
);
1757 if ((dum
->port_status
& PORT_C_MASK
) != 0)
1758 usb_hcd_poll_rh_status (hcd
);
1762 static int dummy_bus_suspend (struct usb_hcd
*hcd
)
1764 struct dummy
*dum
= hcd_to_dummy (hcd
);
1766 dev_dbg (&hcd
->self
.root_hub
->dev
, "%s\n", __func__
);
1768 spin_lock_irq (&dum
->lock
);
1769 dum
->rh_state
= DUMMY_RH_SUSPENDED
;
1770 set_link_state (dum
);
1771 hcd
->state
= HC_STATE_SUSPENDED
;
1772 spin_unlock_irq (&dum
->lock
);
1776 static int dummy_bus_resume (struct usb_hcd
*hcd
)
1778 struct dummy
*dum
= hcd_to_dummy (hcd
);
1781 dev_dbg (&hcd
->self
.root_hub
->dev
, "%s\n", __func__
);
1783 spin_lock_irq (&dum
->lock
);
1784 if (!HCD_HW_ACCESSIBLE(hcd
)) {
1787 dum
->rh_state
= DUMMY_RH_RUNNING
;
1788 set_link_state (dum
);
1789 if (!list_empty(&dum
->urbp_list
))
1790 mod_timer (&dum
->timer
, jiffies
);
1791 hcd
->state
= HC_STATE_RUNNING
;
1793 spin_unlock_irq (&dum
->lock
);
1797 /*-------------------------------------------------------------------------*/
1799 static inline ssize_t
1800 show_urb (char *buf
, size_t size
, struct urb
*urb
)
1802 int ep
= usb_pipeendpoint (urb
->pipe
);
1804 return snprintf (buf
, size
,
1805 "urb/%p %s ep%d%s%s len %d/%d\n",
1808 switch (urb
->dev
->speed
) {
1812 case USB_SPEED_FULL
:
1815 case USB_SPEED_HIGH
:
1822 ep
, ep
? (usb_pipein (urb
->pipe
) ? "in" : "out") : "",
1824 switch (usb_pipetype (urb
->pipe
)) { \
1825 case PIPE_CONTROL
: \
1831 case PIPE_INTERRUPT
: \
1838 urb
->actual_length
, urb
->transfer_buffer_length
);
1842 show_urbs (struct device
*dev
, struct device_attribute
*attr
, char *buf
)
1844 struct usb_hcd
*hcd
= dev_get_drvdata (dev
);
1845 struct dummy
*dum
= hcd_to_dummy (hcd
);
1848 unsigned long flags
;
1850 spin_lock_irqsave (&dum
->lock
, flags
);
1851 list_for_each_entry (urbp
, &dum
->urbp_list
, urbp_list
) {
1854 temp
= show_urb (buf
, PAGE_SIZE
- size
, urbp
->urb
);
1858 spin_unlock_irqrestore (&dum
->lock
, flags
);
1862 static DEVICE_ATTR (urbs
, S_IRUGO
, show_urbs
, NULL
);
1864 static int dummy_start (struct usb_hcd
*hcd
)
1868 dum
= hcd_to_dummy (hcd
);
1871 * MASTER side init ... we emulate a root hub that'll only ever
1872 * talk to one device (the slave side). Also appears in sysfs,
1873 * just like more familiar pci-based HCDs.
1875 spin_lock_init (&dum
->lock
);
1876 init_timer (&dum
->timer
);
1877 dum
->timer
.function
= dummy_timer
;
1878 dum
->timer
.data
= (unsigned long) dum
;
1879 dum
->rh_state
= DUMMY_RH_RUNNING
;
1881 INIT_LIST_HEAD (&dum
->urbp_list
);
1883 hcd
->power_budget
= POWER_BUDGET
;
1884 hcd
->state
= HC_STATE_RUNNING
;
1885 hcd
->uses_new_polling
= 1;
1887 #ifdef CONFIG_USB_OTG
1888 hcd
->self
.otg_port
= 1;
1891 /* FIXME 'urbs' should be a per-device thing, maybe in usbcore */
1892 return device_create_file (dummy_dev(dum
), &dev_attr_urbs
);
1895 static void dummy_stop (struct usb_hcd
*hcd
)
1899 dum
= hcd_to_dummy (hcd
);
1901 device_remove_file (dummy_dev(dum
), &dev_attr_urbs
);
1902 dev_info (dummy_dev(dum
), "stopped\n");
1905 /*-------------------------------------------------------------------------*/
1907 static int dummy_h_get_frame (struct usb_hcd
*hcd
)
1909 return dummy_g_get_frame (NULL
);
1912 static const struct hc_driver dummy_hcd
= {
1913 .description
= (char *) driver_name
,
1914 .product_desc
= "Dummy host controller",
1915 .hcd_priv_size
= sizeof(struct dummy
),
1919 .start
= dummy_start
,
1922 .urb_enqueue
= dummy_urb_enqueue
,
1923 .urb_dequeue
= dummy_urb_dequeue
,
1925 .get_frame_number
= dummy_h_get_frame
,
1927 .hub_status_data
= dummy_hub_status
,
1928 .hub_control
= dummy_hub_control
,
1929 .bus_suspend
= dummy_bus_suspend
,
1930 .bus_resume
= dummy_bus_resume
,
1933 static int dummy_hcd_probe(struct platform_device
*pdev
)
1935 struct usb_hcd
*hcd
;
1938 dev_info(&pdev
->dev
, "%s, driver " DRIVER_VERSION
"\n", driver_desc
);
1940 hcd
= usb_create_hcd(&dummy_hcd
, &pdev
->dev
, dev_name(&pdev
->dev
));
1943 the_controller
= hcd_to_dummy (hcd
);
1946 retval
= usb_add_hcd(hcd
, 0, 0);
1949 the_controller
= NULL
;
1954 static int dummy_hcd_remove (struct platform_device
*pdev
)
1956 struct usb_hcd
*hcd
;
1958 hcd
= platform_get_drvdata (pdev
);
1959 usb_remove_hcd (hcd
);
1961 the_controller
= NULL
;
1965 static int dummy_hcd_suspend (struct platform_device
*pdev
, pm_message_t state
)
1967 struct usb_hcd
*hcd
;
1971 dev_dbg (&pdev
->dev
, "%s\n", __func__
);
1973 hcd
= platform_get_drvdata (pdev
);
1974 dum
= hcd_to_dummy (hcd
);
1975 if (dum
->rh_state
== DUMMY_RH_RUNNING
) {
1976 dev_warn(&pdev
->dev
, "Root hub isn't suspended!\n");
1979 clear_bit(HCD_FLAG_HW_ACCESSIBLE
, &hcd
->flags
);
1983 static int dummy_hcd_resume (struct platform_device
*pdev
)
1985 struct usb_hcd
*hcd
;
1987 dev_dbg (&pdev
->dev
, "%s\n", __func__
);
1989 hcd
= platform_get_drvdata (pdev
);
1990 set_bit(HCD_FLAG_HW_ACCESSIBLE
, &hcd
->flags
);
1991 usb_hcd_poll_rh_status (hcd
);
1995 static struct platform_driver dummy_hcd_driver
= {
1996 .probe
= dummy_hcd_probe
,
1997 .remove
= dummy_hcd_remove
,
1998 .suspend
= dummy_hcd_suspend
,
1999 .resume
= dummy_hcd_resume
,
2001 .name
= (char *) driver_name
,
2002 .owner
= THIS_MODULE
,
2006 /*-------------------------------------------------------------------------*/
2008 static struct platform_device
*the_udc_pdev
;
2009 static struct platform_device
*the_hcd_pdev
;
2011 static int __init
init (void)
2013 int retval
= -ENOMEM
;
2015 if (usb_disabled ())
2018 the_hcd_pdev
= platform_device_alloc(driver_name
, -1);
2021 the_udc_pdev
= platform_device_alloc(gadget_name
, -1);
2025 retval
= platform_driver_register(&dummy_hcd_driver
);
2027 goto err_register_hcd_driver
;
2028 retval
= platform_driver_register(&dummy_udc_driver
);
2030 goto err_register_udc_driver
;
2032 retval
= platform_device_add(the_hcd_pdev
);
2035 if (!the_controller
) {
2037 * The hcd was added successfully but its probe function failed
2043 retval
= platform_device_add(the_udc_pdev
);
2046 if (!platform_get_drvdata(the_udc_pdev
)) {
2048 * The udc was added successfully but its probe function failed
2057 platform_device_del(the_udc_pdev
);
2059 platform_device_del(the_hcd_pdev
);
2061 platform_driver_unregister(&dummy_udc_driver
);
2062 err_register_udc_driver
:
2063 platform_driver_unregister(&dummy_hcd_driver
);
2064 err_register_hcd_driver
:
2065 platform_device_put(the_udc_pdev
);
2067 platform_device_put(the_hcd_pdev
);
2072 static void __exit
cleanup (void)
2074 platform_device_unregister(the_udc_pdev
);
2075 platform_device_unregister(the_hcd_pdev
);
2076 platform_driver_unregister(&dummy_udc_driver
);
2077 platform_driver_unregister(&dummy_hcd_driver
);
2079 module_exit (cleanup
);