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>
51 #include <asm/byteorder.h>
54 #include <asm/system.h>
55 #include <asm/unaligned.h>
58 #include "../core/hcd.h"
61 #define DRIVER_DESC "USB Host+Gadget Emulator"
62 #define DRIVER_VERSION "02 May 2005"
64 #define POWER_BUDGET 500 /* in mA; use 8 for low-power port testing */
66 static const char driver_name
[] = "dummy_hcd";
67 static const char driver_desc
[] = "USB Host+Gadget Emulator";
69 static const char gadget_name
[] = "dummy_udc";
71 MODULE_DESCRIPTION (DRIVER_DESC
);
72 MODULE_AUTHOR ("David Brownell");
73 MODULE_LICENSE ("GPL");
75 /*-------------------------------------------------------------------------*/
77 /* gadget side driver data structres */
79 struct list_head queue
;
80 unsigned long last_io
; /* jiffies timestamp */
81 struct usb_gadget
*gadget
;
82 const struct usb_endpoint_descriptor
*desc
;
85 unsigned already_seen
: 1;
86 unsigned setup_stage
: 1;
89 struct dummy_request
{
90 struct list_head queue
; /* ep's requests */
91 struct usb_request req
;
94 static inline struct dummy_ep
*usb_ep_to_dummy_ep (struct usb_ep
*_ep
)
96 return container_of (_ep
, struct dummy_ep
, ep
);
99 static inline struct dummy_request
*usb_request_to_dummy_request
100 (struct usb_request
*_req
)
102 return container_of (_req
, struct dummy_request
, req
);
105 /*-------------------------------------------------------------------------*/
108 * Every device has ep0 for control requests, plus up to 30 more endpoints,
109 * in one of two types:
111 * - Configurable: direction (in/out), type (bulk, iso, etc), and endpoint
112 * number can be changed. Names like "ep-a" are used for this type.
114 * - Fixed Function: in other cases. some characteristics may be mutable;
115 * that'd be hardware-specific. Names like "ep12out-bulk" are used.
117 * Gadget drivers are responsible for not setting up conflicting endpoint
118 * configurations, illegal or unsupported packet lengths, and so on.
121 static const char ep0name
[] = "ep0";
123 static const char *const ep_name
[] = {
124 ep0name
, /* everyone has ep0 */
126 /* act like a net2280: high speed, six configurable endpoints */
127 "ep-a", "ep-b", "ep-c", "ep-d", "ep-e", "ep-f",
129 /* or like pxa250: fifteen fixed function endpoints */
130 "ep1in-bulk", "ep2out-bulk", "ep3in-iso", "ep4out-iso", "ep5in-int",
131 "ep6in-bulk", "ep7out-bulk", "ep8in-iso", "ep9out-iso", "ep10in-int",
132 "ep11in-bulk", "ep12out-bulk", "ep13in-iso", "ep14out-iso",
135 /* or like sa1100: two fixed function endpoints */
136 "ep1out-bulk", "ep2in-bulk",
138 #define DUMMY_ENDPOINTS ARRAY_SIZE(ep_name)
140 /*-------------------------------------------------------------------------*/
146 struct list_head urbp_list
;
150 enum dummy_rh_state
{
160 * SLAVE/GADGET side support
162 struct dummy_ep ep
[DUMMY_ENDPOINTS
];
164 struct usb_gadget gadget
;
165 struct usb_gadget_driver
*driver
;
166 struct dummy_request fifo_req
;
167 u8 fifo_buf
[FIFO_SIZE
];
169 unsigned udc_suspended
:1;
172 unsigned old_active
:1;
175 * MASTER/HOST side support
177 enum dummy_rh_state rh_state
;
178 struct timer_list timer
;
182 unsigned long re_timeout
;
184 struct usb_device
*udev
;
185 struct list_head urbp_list
;
188 static inline struct dummy
*hcd_to_dummy (struct usb_hcd
*hcd
)
190 return (struct dummy
*) (hcd
->hcd_priv
);
193 static inline struct usb_hcd
*dummy_to_hcd (struct dummy
*dum
)
195 return container_of((void *) dum
, struct usb_hcd
, hcd_priv
);
198 static inline struct device
*dummy_dev (struct dummy
*dum
)
200 return dummy_to_hcd(dum
)->self
.controller
;
203 static inline struct device
*udc_dev (struct dummy
*dum
)
205 return dum
->gadget
.dev
.parent
;
208 static inline struct dummy
*ep_to_dummy (struct dummy_ep
*ep
)
210 return container_of (ep
->gadget
, struct dummy
, gadget
);
213 static inline struct dummy
*gadget_to_dummy (struct usb_gadget
*gadget
)
215 return container_of (gadget
, struct dummy
, gadget
);
218 static inline struct dummy
*gadget_dev_to_dummy (struct device
*dev
)
220 return container_of (dev
, struct dummy
, gadget
.dev
);
223 static struct dummy
*the_controller
;
225 /*-------------------------------------------------------------------------*/
227 /* SLAVE/GADGET SIDE UTILITY ROUTINES */
229 /* called with spinlock held */
230 static void nuke (struct dummy
*dum
, struct dummy_ep
*ep
)
232 while (!list_empty (&ep
->queue
)) {
233 struct dummy_request
*req
;
235 req
= list_entry (ep
->queue
.next
, struct dummy_request
, queue
);
236 list_del_init (&req
->queue
);
237 req
->req
.status
= -ESHUTDOWN
;
239 spin_unlock (&dum
->lock
);
240 req
->req
.complete (&ep
->ep
, &req
->req
);
241 spin_lock (&dum
->lock
);
245 /* caller must hold lock */
247 stop_activity (struct dummy
*dum
)
251 /* prevent any more requests */
254 /* The timer is left running so that outstanding URBs can fail */
256 /* nuke any pending requests first, so driver i/o is quiesced */
257 list_for_each_entry (ep
, &dum
->gadget
.ep_list
, ep
.ep_list
)
260 /* driver now does any non-usb quiescing necessary */
263 /* caller must hold lock */
265 set_link_state (struct dummy
*dum
)
268 if ((dum
->port_status
& USB_PORT_STAT_POWER
) == 0)
269 dum
->port_status
= 0;
271 /* UDC suspend must cause a disconnect */
272 else if (!dum
->pullup
|| dum
->udc_suspended
) {
273 dum
->port_status
&= ~(USB_PORT_STAT_CONNECTION
|
274 USB_PORT_STAT_ENABLE
|
275 USB_PORT_STAT_LOW_SPEED
|
276 USB_PORT_STAT_HIGH_SPEED
|
277 USB_PORT_STAT_SUSPEND
);
278 if ((dum
->old_status
& USB_PORT_STAT_CONNECTION
) != 0)
279 dum
->port_status
|= (USB_PORT_STAT_C_CONNECTION
<< 16);
281 dum
->port_status
|= USB_PORT_STAT_CONNECTION
;
282 if ((dum
->old_status
& USB_PORT_STAT_CONNECTION
) == 0)
283 dum
->port_status
|= (USB_PORT_STAT_C_CONNECTION
<< 16);
284 if ((dum
->port_status
& USB_PORT_STAT_ENABLE
) == 0)
285 dum
->port_status
&= ~USB_PORT_STAT_SUSPEND
;
286 else if ((dum
->port_status
& USB_PORT_STAT_SUSPEND
) == 0 &&
287 dum
->rh_state
!= DUMMY_RH_SUSPENDED
)
291 if ((dum
->port_status
& USB_PORT_STAT_ENABLE
) == 0 || dum
->active
)
294 if ((dum
->port_status
& USB_PORT_STAT_CONNECTION
) == 0 ||
295 (dum
->port_status
& USB_PORT_STAT_RESET
) != 0) {
296 if ((dum
->old_status
& USB_PORT_STAT_CONNECTION
) != 0 &&
297 (dum
->old_status
& USB_PORT_STAT_RESET
) == 0 &&
300 spin_unlock (&dum
->lock
);
301 dum
->driver
->disconnect (&dum
->gadget
);
302 spin_lock (&dum
->lock
);
304 } else if (dum
->active
!= dum
->old_active
) {
305 if (dum
->old_active
&& dum
->driver
->suspend
) {
306 spin_unlock (&dum
->lock
);
307 dum
->driver
->suspend (&dum
->gadget
);
308 spin_lock (&dum
->lock
);
309 } else if (!dum
->old_active
&& dum
->driver
->resume
) {
310 spin_unlock (&dum
->lock
);
311 dum
->driver
->resume (&dum
->gadget
);
312 spin_lock (&dum
->lock
);
316 dum
->old_status
= dum
->port_status
;
317 dum
->old_active
= dum
->active
;
320 /*-------------------------------------------------------------------------*/
322 /* SLAVE/GADGET SIDE DRIVER
324 * This only tracks gadget state. All the work is done when the host
325 * side tries some (emulated) i/o operation. Real device controller
326 * drivers would do real i/o using dma, fifos, irqs, timers, etc.
329 #define is_enabled(dum) \
330 (dum->port_status & USB_PORT_STAT_ENABLE)
333 dummy_enable (struct usb_ep
*_ep
, const struct usb_endpoint_descriptor
*desc
)
340 ep
= usb_ep_to_dummy_ep (_ep
);
341 if (!_ep
|| !desc
|| ep
->desc
|| _ep
->name
== ep0name
342 || desc
->bDescriptorType
!= USB_DT_ENDPOINT
)
344 dum
= ep_to_dummy (ep
);
345 if (!dum
->driver
|| !is_enabled (dum
))
347 max
= le16_to_cpu(desc
->wMaxPacketSize
) & 0x3ff;
349 /* drivers must not request bad settings, since lower levels
350 * (hardware or its drivers) may not check. some endpoints
351 * can't do iso, many have maxpacket limitations, etc.
353 * since this "hardware" driver is here to help debugging, we
354 * have some extra sanity checks. (there could be more though,
355 * especially for "ep9out" style fixed function ones.)
358 switch (desc
->bmAttributes
& 0x03) {
359 case USB_ENDPOINT_XFER_BULK
:
360 if (strstr (ep
->ep
.name
, "-iso")
361 || strstr (ep
->ep
.name
, "-int")) {
364 switch (dum
->gadget
.speed
) {
368 /* conserve return statements */
371 case 8: case 16: case 32: case 64:
372 /* we'll fake any legal size */
380 case USB_ENDPOINT_XFER_INT
:
381 if (strstr (ep
->ep
.name
, "-iso")) /* bulk is ok */
383 /* real hardware might not handle all packet sizes */
384 switch (dum
->gadget
.speed
) {
388 /* save a return statement */
392 /* save a return statement */
399 case USB_ENDPOINT_XFER_ISOC
:
400 if (strstr (ep
->ep
.name
, "-bulk")
401 || strstr (ep
->ep
.name
, "-int"))
403 /* real hardware might not handle all packet sizes */
404 switch (dum
->gadget
.speed
) {
408 /* save a return statement */
412 /* save a return statement */
418 /* few chips support control except on ep0 */
422 _ep
->maxpacket
= max
;
425 dev_dbg (udc_dev(dum
), "enabled %s (ep%d%s-%s) maxpacket %d\n",
427 desc
->bEndpointAddress
& 0x0f,
428 (desc
->bEndpointAddress
& USB_DIR_IN
) ? "in" : "out",
430 switch (desc
->bmAttributes
& 0x03) {
431 case USB_ENDPOINT_XFER_BULK
: val
= "bulk"; break;
432 case USB_ENDPOINT_XFER_ISOC
: val
= "iso"; break;
433 case USB_ENDPOINT_XFER_INT
: val
= "intr"; break;
434 default: val
= "ctrl"; break;
438 /* at this point real hardware should be NAKing transfers
439 * to that endpoint, until a buffer is queued to it.
446 static int dummy_disable (struct usb_ep
*_ep
)
453 ep
= usb_ep_to_dummy_ep (_ep
);
454 if (!_ep
|| !ep
->desc
|| _ep
->name
== ep0name
)
456 dum
= ep_to_dummy (ep
);
458 spin_lock_irqsave (&dum
->lock
, flags
);
462 spin_unlock_irqrestore (&dum
->lock
, flags
);
464 dev_dbg (udc_dev(dum
), "disabled %s\n", _ep
->name
);
468 static struct usb_request
*
469 dummy_alloc_request (struct usb_ep
*_ep
, gfp_t mem_flags
)
472 struct dummy_request
*req
;
476 ep
= usb_ep_to_dummy_ep (_ep
);
478 req
= kzalloc(sizeof(*req
), mem_flags
);
481 INIT_LIST_HEAD (&req
->queue
);
486 dummy_free_request (struct usb_ep
*_ep
, struct usb_request
*_req
)
489 struct dummy_request
*req
;
491 ep
= usb_ep_to_dummy_ep (_ep
);
492 if (!ep
|| !_req
|| (!ep
->desc
&& _ep
->name
!= ep0name
))
495 req
= usb_request_to_dummy_request (_req
);
496 WARN_ON (!list_empty (&req
->queue
));
501 fifo_complete (struct usb_ep
*ep
, struct usb_request
*req
)
506 dummy_queue (struct usb_ep
*_ep
, struct usb_request
*_req
,
510 struct dummy_request
*req
;
514 req
= usb_request_to_dummy_request (_req
);
515 if (!_req
|| !list_empty (&req
->queue
) || !_req
->complete
)
518 ep
= usb_ep_to_dummy_ep (_ep
);
519 if (!_ep
|| (!ep
->desc
&& _ep
->name
!= ep0name
))
522 dum
= ep_to_dummy (ep
);
523 if (!dum
->driver
|| !is_enabled (dum
))
527 dev_dbg (udc_dev(dum
), "ep %p queue req %p to %s, len %d buf %p\n",
528 ep
, _req
, _ep
->name
, _req
->length
, _req
->buf
);
531 _req
->status
= -EINPROGRESS
;
533 spin_lock_irqsave (&dum
->lock
, flags
);
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
;
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
;
547 spin_unlock (&dum
->lock
);
548 _req
->actual
= _req
->length
;
550 _req
->complete (_ep
, _req
);
551 spin_lock (&dum
->lock
);
553 list_add_tail (&req
->queue
, &ep
->queue
);
554 spin_unlock_irqrestore (&dum
->lock
, flags
);
556 /* real hardware would likely enable transfers here, in case
557 * it'd been left NAKing.
562 static int dummy_dequeue (struct usb_ep
*_ep
, struct usb_request
*_req
)
566 int retval
= -EINVAL
;
568 struct dummy_request
*req
= NULL
;
572 ep
= usb_ep_to_dummy_ep (_ep
);
573 dum
= ep_to_dummy (ep
);
578 local_irq_save (flags
);
579 spin_lock (&dum
->lock
);
580 list_for_each_entry (req
, &ep
->queue
, queue
) {
581 if (&req
->req
== _req
) {
582 list_del_init (&req
->queue
);
583 _req
->status
= -ECONNRESET
;
588 spin_unlock (&dum
->lock
);
591 dev_dbg (udc_dev(dum
),
592 "dequeued req %p from %s, len %d buf %p\n",
593 req
, _ep
->name
, _req
->length
, _req
->buf
);
594 _req
->complete (_ep
, _req
);
596 local_irq_restore (flags
);
601 dummy_set_halt (struct usb_ep
*_ep
, int value
)
608 ep
= usb_ep_to_dummy_ep (_ep
);
609 dum
= ep_to_dummy (ep
);
614 else if (ep
->desc
&& (ep
->desc
->bEndpointAddress
& USB_DIR_IN
) &&
615 !list_empty (&ep
->queue
))
619 /* FIXME clear emulated data toggle too */
623 static const struct usb_ep_ops dummy_ep_ops
= {
624 .enable
= dummy_enable
,
625 .disable
= dummy_disable
,
627 .alloc_request
= dummy_alloc_request
,
628 .free_request
= dummy_free_request
,
630 .queue
= dummy_queue
,
631 .dequeue
= dummy_dequeue
,
633 .set_halt
= dummy_set_halt
,
636 /*-------------------------------------------------------------------------*/
638 /* there are both host and device side versions of this call ... */
639 static int dummy_g_get_frame (struct usb_gadget
*_gadget
)
643 do_gettimeofday (&tv
);
644 return tv
.tv_usec
/ 1000;
647 static int dummy_wakeup (struct usb_gadget
*_gadget
)
651 dum
= gadget_to_dummy (_gadget
);
652 if (!(dum
->devstatus
& ( (1 << USB_DEVICE_B_HNP_ENABLE
)
653 | (1 << USB_DEVICE_REMOTE_WAKEUP
))))
655 if ((dum
->port_status
& USB_PORT_STAT_CONNECTION
) == 0)
657 if ((dum
->port_status
& USB_PORT_STAT_SUSPEND
) == 0 &&
658 dum
->rh_state
!= DUMMY_RH_SUSPENDED
)
661 /* FIXME: What if the root hub is suspended but the port isn't? */
663 /* hub notices our request, issues downstream resume, etc */
665 dum
->re_timeout
= jiffies
+ msecs_to_jiffies(20);
666 mod_timer (&dummy_to_hcd (dum
)->rh_timer
, dum
->re_timeout
);
670 static int dummy_set_selfpowered (struct usb_gadget
*_gadget
, int value
)
674 dum
= gadget_to_dummy (_gadget
);
676 dum
->devstatus
|= (1 << USB_DEVICE_SELF_POWERED
);
678 dum
->devstatus
&= ~(1 << USB_DEVICE_SELF_POWERED
);
682 static int dummy_pullup (struct usb_gadget
*_gadget
, int value
)
687 dum
= gadget_to_dummy (_gadget
);
688 spin_lock_irqsave (&dum
->lock
, flags
);
689 dum
->pullup
= (value
!= 0);
690 set_link_state (dum
);
691 spin_unlock_irqrestore (&dum
->lock
, flags
);
693 usb_hcd_poll_rh_status (dummy_to_hcd (dum
));
697 static const struct usb_gadget_ops dummy_ops
= {
698 .get_frame
= dummy_g_get_frame
,
699 .wakeup
= dummy_wakeup
,
700 .set_selfpowered
= dummy_set_selfpowered
,
701 .pullup
= dummy_pullup
,
704 /*-------------------------------------------------------------------------*/
706 /* "function" sysfs attribute */
708 show_function (struct device
*dev
, struct device_attribute
*attr
, char *buf
)
710 struct dummy
*dum
= gadget_dev_to_dummy (dev
);
712 if (!dum
->driver
|| !dum
->driver
->function
)
714 return scnprintf (buf
, PAGE_SIZE
, "%s\n", dum
->driver
->function
);
716 static DEVICE_ATTR (function
, S_IRUGO
, show_function
, NULL
);
718 /*-------------------------------------------------------------------------*/
721 * Driver registration/unregistration.
723 * This is basically hardware-specific; there's usually only one real USB
724 * device (not host) controller since that's how USB devices are intended
725 * to work. So most implementations of these api calls will rely on the
726 * fact that only one driver will ever bind to the hardware. But curious
727 * hardware can be built with discrete components, so the gadget API doesn't
728 * require that assumption.
730 * For this emulator, it might be convenient to create a usb slave device
731 * for each driver that registers: just add to a big root hub.
735 usb_gadget_register_driver (struct usb_gadget_driver
*driver
)
737 struct dummy
*dum
= the_controller
;
744 if (!driver
->bind
|| !driver
->setup
745 || driver
->speed
== USB_SPEED_UNKNOWN
)
749 * SLAVE side init ... the layer above hardware, which
750 * can't enumerate without help from the driver we're binding.
755 INIT_LIST_HEAD (&dum
->gadget
.ep_list
);
756 for (i
= 0; i
< DUMMY_ENDPOINTS
; i
++) {
757 struct dummy_ep
*ep
= &dum
->ep
[i
];
761 ep
->ep
.name
= ep_name
[i
];
762 ep
->ep
.ops
= &dummy_ep_ops
;
763 list_add_tail (&ep
->ep
.ep_list
, &dum
->gadget
.ep_list
);
764 ep
->halted
= ep
->already_seen
= ep
->setup_stage
= 0;
765 ep
->ep
.maxpacket
= ~0;
766 ep
->last_io
= jiffies
;
767 ep
->gadget
= &dum
->gadget
;
769 INIT_LIST_HEAD (&ep
->queue
);
772 dum
->gadget
.ep0
= &dum
->ep
[0].ep
;
773 dum
->ep
[0].ep
.maxpacket
= 64;
774 list_del_init (&dum
->ep
[0].ep
.ep_list
);
775 INIT_LIST_HEAD(&dum
->fifo_req
.queue
);
777 driver
->driver
.bus
= NULL
;
778 dum
->driver
= driver
;
779 dum
->gadget
.dev
.driver
= &driver
->driver
;
780 dev_dbg (udc_dev(dum
), "binding gadget driver '%s'\n",
781 driver
->driver
.name
);
782 retval
= driver
->bind(&dum
->gadget
);
785 dum
->gadget
.dev
.driver
= NULL
;
789 /* khubd will enumerate this in a while */
790 spin_lock_irq (&dum
->lock
);
792 set_link_state (dum
);
793 spin_unlock_irq (&dum
->lock
);
795 usb_hcd_poll_rh_status (dummy_to_hcd (dum
));
798 EXPORT_SYMBOL (usb_gadget_register_driver
);
801 usb_gadget_unregister_driver (struct usb_gadget_driver
*driver
)
803 struct dummy
*dum
= the_controller
;
808 if (!driver
|| driver
!= dum
->driver
|| !driver
->unbind
)
811 dev_dbg (udc_dev(dum
), "unregister gadget driver '%s'\n",
812 driver
->driver
.name
);
814 spin_lock_irqsave (&dum
->lock
, flags
);
816 set_link_state (dum
);
817 spin_unlock_irqrestore (&dum
->lock
, flags
);
819 driver
->unbind (&dum
->gadget
);
820 dum
->gadget
.dev
.driver
= NULL
;
823 spin_lock_irqsave (&dum
->lock
, flags
);
825 set_link_state (dum
);
826 spin_unlock_irqrestore (&dum
->lock
, flags
);
828 usb_hcd_poll_rh_status (dummy_to_hcd (dum
));
831 EXPORT_SYMBOL (usb_gadget_unregister_driver
);
835 /* just declare this in any driver that really need it */
836 extern int net2280_set_fifo_mode (struct usb_gadget
*gadget
, int mode
);
838 int net2280_set_fifo_mode (struct usb_gadget
*gadget
, int mode
)
842 EXPORT_SYMBOL (net2280_set_fifo_mode
);
845 /* The gadget structure is stored inside the hcd structure and will be
846 * released along with it. */
848 dummy_gadget_release (struct device
*dev
)
850 struct dummy
*dum
= gadget_dev_to_dummy (dev
);
852 usb_put_hcd (dummy_to_hcd (dum
));
855 static int dummy_udc_probe (struct platform_device
*pdev
)
857 struct dummy
*dum
= the_controller
;
860 dum
->gadget
.name
= gadget_name
;
861 dum
->gadget
.ops
= &dummy_ops
;
862 dum
->gadget
.is_dualspeed
= 1;
864 /* maybe claim OTG support, though we won't complete HNP */
865 dum
->gadget
.is_otg
= (dummy_to_hcd(dum
)->self
.otg_port
!= 0);
867 strcpy (dum
->gadget
.dev
.bus_id
, "gadget");
868 dum
->gadget
.dev
.parent
= &pdev
->dev
;
869 dum
->gadget
.dev
.release
= dummy_gadget_release
;
870 rc
= device_register (&dum
->gadget
.dev
);
874 usb_get_hcd (dummy_to_hcd (dum
));
876 platform_set_drvdata (pdev
, dum
);
877 rc
= device_create_file (&dum
->gadget
.dev
, &dev_attr_function
);
879 device_unregister (&dum
->gadget
.dev
);
883 static int dummy_udc_remove (struct platform_device
*pdev
)
885 struct dummy
*dum
= platform_get_drvdata (pdev
);
887 platform_set_drvdata (pdev
, NULL
);
888 device_remove_file (&dum
->gadget
.dev
, &dev_attr_function
);
889 device_unregister (&dum
->gadget
.dev
);
893 static int dummy_udc_suspend (struct platform_device
*pdev
, pm_message_t state
)
895 struct dummy
*dum
= platform_get_drvdata(pdev
);
897 dev_dbg (&pdev
->dev
, "%s\n", __FUNCTION__
);
898 spin_lock_irq (&dum
->lock
);
899 dum
->udc_suspended
= 1;
900 set_link_state (dum
);
901 spin_unlock_irq (&dum
->lock
);
903 usb_hcd_poll_rh_status (dummy_to_hcd (dum
));
907 static int dummy_udc_resume (struct platform_device
*pdev
)
909 struct dummy
*dum
= platform_get_drvdata(pdev
);
911 dev_dbg (&pdev
->dev
, "%s\n", __FUNCTION__
);
912 spin_lock_irq (&dum
->lock
);
913 dum
->udc_suspended
= 0;
914 set_link_state (dum
);
915 spin_unlock_irq (&dum
->lock
);
917 usb_hcd_poll_rh_status (dummy_to_hcd (dum
));
921 static struct platform_driver dummy_udc_driver
= {
922 .probe
= dummy_udc_probe
,
923 .remove
= dummy_udc_remove
,
924 .suspend
= dummy_udc_suspend
,
925 .resume
= dummy_udc_resume
,
927 .name
= (char *) gadget_name
,
928 .owner
= THIS_MODULE
,
932 /*-------------------------------------------------------------------------*/
934 /* MASTER/HOST SIDE DRIVER
936 * this uses the hcd framework to hook up to host side drivers.
937 * its root hub will only have one device, otherwise it acts like
938 * a normal host controller.
940 * when urbs are queued, they're just stuck on a list that we
941 * scan in a timer callback. that callback connects writes from
942 * the host with reads from the device, and so on, based on the
946 static int dummy_urb_enqueue (
956 if (!urb
->transfer_buffer
&& urb
->transfer_buffer_length
)
959 urbp
= kmalloc (sizeof *urbp
, mem_flags
);
964 dum
= hcd_to_dummy (hcd
);
965 spin_lock_irqsave (&dum
->lock
, flags
);
966 rc
= usb_hcd_link_urb_to_ep(hcd
, urb
);
973 dum
->udev
= urb
->dev
;
974 usb_get_dev (dum
->udev
);
975 } else if (unlikely (dum
->udev
!= urb
->dev
))
976 dev_err (dummy_dev(dum
), "usb_device address has changed!\n");
978 list_add_tail (&urbp
->urbp_list
, &dum
->urbp_list
);
980 if (usb_pipetype (urb
->pipe
) == PIPE_CONTROL
)
981 urb
->error_count
= 1; /* mark as a new urb */
983 /* kick the scheduler, it'll do the rest */
984 if (!timer_pending (&dum
->timer
))
985 mod_timer (&dum
->timer
, jiffies
+ 1);
988 spin_unlock_irqrestore(&dum
->lock
, flags
);
992 static int dummy_urb_dequeue(struct usb_hcd
*hcd
, struct urb
*urb
, int status
)
998 /* giveback happens automatically in timer callback,
999 * so make sure the callback happens */
1000 dum
= hcd_to_dummy (hcd
);
1001 spin_lock_irqsave (&dum
->lock
, flags
);
1003 rc
= usb_hcd_check_unlink_urb(hcd
, urb
, status
);
1004 if (!rc
&& dum
->rh_state
!= DUMMY_RH_RUNNING
&&
1005 !list_empty(&dum
->urbp_list
))
1006 mod_timer (&dum
->timer
, jiffies
);
1008 spin_unlock_irqrestore (&dum
->lock
, flags
);
1012 /* transfer up to a frame's worth; caller must own lock */
1014 transfer(struct dummy
*dum
, struct urb
*urb
, struct dummy_ep
*ep
, int limit
,
1017 struct dummy_request
*req
;
1020 /* if there's no request queued, the device is NAKing; return */
1021 list_for_each_entry (req
, &ep
->queue
, queue
) {
1022 unsigned host_len
, dev_len
, len
;
1023 int is_short
, to_host
;
1026 /* 1..N packets of ep->ep.maxpacket each ... the last one
1027 * may be short (including zero length).
1029 * writer can send a zlp explicitly (length 0) or implicitly
1030 * (length mod maxpacket zero, and 'zero' flag); they always
1033 host_len
= urb
->transfer_buffer_length
- urb
->actual_length
;
1034 dev_len
= req
->req
.length
- req
->req
.actual
;
1035 len
= min (host_len
, dev_len
);
1037 /* FIXME update emulated data toggle too */
1039 to_host
= usb_pipein (urb
->pipe
);
1040 if (unlikely (len
== 0))
1045 /* not enough bandwidth left? */
1046 if (limit
< ep
->ep
.maxpacket
&& limit
< len
)
1048 len
= min (len
, (unsigned) limit
);
1052 /* use an extra pass for the final short packet */
1053 if (len
> ep
->ep
.maxpacket
) {
1055 len
-= (len
% ep
->ep
.maxpacket
);
1057 is_short
= (len
% ep
->ep
.maxpacket
) != 0;
1059 /* else transfer packet(s) */
1060 ubuf
= urb
->transfer_buffer
+ urb
->actual_length
;
1061 rbuf
= req
->req
.buf
+ req
->req
.actual
;
1063 memcpy (ubuf
, rbuf
, len
);
1065 memcpy (rbuf
, ubuf
, len
);
1066 ep
->last_io
= jiffies
;
1069 urb
->actual_length
+= len
;
1070 req
->req
.actual
+= len
;
1073 /* short packets terminate, maybe with overflow/underflow.
1074 * it's only really an error to write too much.
1076 * partially filling a buffer optionally blocks queue advances
1077 * (so completion handlers can clean up the queue) but we don't
1078 * need to emulate such data-in-flight.
1081 if (host_len
== dev_len
) {
1082 req
->req
.status
= 0;
1084 } else if (to_host
) {
1085 req
->req
.status
= 0;
1086 if (dev_len
> host_len
)
1087 *status
= -EOVERFLOW
;
1090 } else if (!to_host
) {
1092 if (host_len
> dev_len
)
1093 req
->req
.status
= -EOVERFLOW
;
1095 req
->req
.status
= 0;
1098 /* many requests terminate without a short packet */
1100 if (req
->req
.length
== req
->req
.actual
1102 req
->req
.status
= 0;
1103 if (urb
->transfer_buffer_length
== urb
->actual_length
1104 && !(urb
->transfer_flags
1109 /* device side completion --> continuable */
1110 if (req
->req
.status
!= -EINPROGRESS
) {
1111 list_del_init (&req
->queue
);
1113 spin_unlock (&dum
->lock
);
1114 req
->req
.complete (&ep
->ep
, &req
->req
);
1115 spin_lock (&dum
->lock
);
1117 /* requests might have been unlinked... */
1121 /* host side completion --> terminate */
1122 if (*status
!= -EINPROGRESS
)
1125 /* rescan to continue with any other queued i/o */
1132 static int periodic_bytes (struct dummy
*dum
, struct dummy_ep
*ep
)
1134 int limit
= ep
->ep
.maxpacket
;
1136 if (dum
->gadget
.speed
== USB_SPEED_HIGH
) {
1139 /* high bandwidth mode */
1140 tmp
= le16_to_cpu(ep
->desc
->wMaxPacketSize
);
1141 tmp
= (tmp
>> 11) & 0x03;
1142 tmp
*= 8 /* applies to entire frame */;
1143 limit
+= limit
* tmp
;
1148 #define is_active(dum) ((dum->port_status & \
1149 (USB_PORT_STAT_CONNECTION | USB_PORT_STAT_ENABLE | \
1150 USB_PORT_STAT_SUSPEND)) \
1151 == (USB_PORT_STAT_CONNECTION | USB_PORT_STAT_ENABLE))
1153 static struct dummy_ep
*find_endpoint (struct dummy
*dum
, u8 address
)
1157 if (!is_active (dum
))
1159 if ((address
& ~USB_DIR_IN
) == 0)
1160 return &dum
->ep
[0];
1161 for (i
= 1; i
< DUMMY_ENDPOINTS
; i
++) {
1162 struct dummy_ep
*ep
= &dum
->ep
[i
];
1166 if (ep
->desc
->bEndpointAddress
== address
)
1174 #define Dev_Request (USB_TYPE_STANDARD | USB_RECIP_DEVICE)
1175 #define Dev_InRequest (Dev_Request | USB_DIR_IN)
1176 #define Intf_Request (USB_TYPE_STANDARD | USB_RECIP_INTERFACE)
1177 #define Intf_InRequest (Intf_Request | USB_DIR_IN)
1178 #define Ep_Request (USB_TYPE_STANDARD | USB_RECIP_ENDPOINT)
1179 #define Ep_InRequest (Ep_Request | USB_DIR_IN)
1181 /* drive both sides of the transfers; looks like irq handlers to
1182 * both drivers except the callbacks aren't in_irq().
1184 static void dummy_timer (unsigned long _dum
)
1186 struct dummy
*dum
= (struct dummy
*) _dum
;
1187 struct urbp
*urbp
, *tmp
;
1188 unsigned long flags
;
1192 /* simplistic model for one frame's bandwidth */
1193 switch (dum
->gadget
.speed
) {
1195 total
= 8/*bytes*/ * 12/*packets*/;
1197 case USB_SPEED_FULL
:
1198 total
= 64/*bytes*/ * 19/*packets*/;
1200 case USB_SPEED_HIGH
:
1201 total
= 512/*bytes*/ * 13/*packets*/ * 8/*uframes*/;
1204 dev_err (dummy_dev(dum
), "bogus device speed\n");
1208 /* FIXME if HZ != 1000 this will probably misbehave ... */
1210 /* look at each urb queued by the host side driver */
1211 spin_lock_irqsave (&dum
->lock
, flags
);
1214 dev_err (dummy_dev(dum
),
1215 "timer fired with no URBs pending?\n");
1216 spin_unlock_irqrestore (&dum
->lock
, flags
);
1220 for (i
= 0; i
< DUMMY_ENDPOINTS
; i
++) {
1223 dum
->ep
[i
].already_seen
= 0;
1227 list_for_each_entry_safe (urbp
, tmp
, &dum
->urbp_list
, urbp_list
) {
1229 struct dummy_request
*req
;
1231 struct dummy_ep
*ep
= NULL
;
1233 int status
= -EINPROGRESS
;
1238 else if (dum
->rh_state
!= DUMMY_RH_RUNNING
)
1240 type
= usb_pipetype (urb
->pipe
);
1242 /* used up this frame's non-periodic bandwidth?
1243 * FIXME there's infinite bandwidth for control and
1244 * periodic transfers ... unrealistic.
1246 if (total
<= 0 && type
== PIPE_BULK
)
1249 /* find the gadget's ep for this request (if configured) */
1250 address
= usb_pipeendpoint (urb
->pipe
);
1251 if (usb_pipein (urb
->pipe
))
1252 address
|= USB_DIR_IN
;
1253 ep
= find_endpoint(dum
, address
);
1255 /* set_configuration() disagreement */
1256 dev_dbg (dummy_dev(dum
),
1257 "no ep configured for urb %p\n",
1263 if (ep
->already_seen
)
1265 ep
->already_seen
= 1;
1266 if (ep
== &dum
->ep
[0] && urb
->error_count
) {
1267 ep
->setup_stage
= 1; /* a new urb */
1268 urb
->error_count
= 0;
1270 if (ep
->halted
&& !ep
->setup_stage
) {
1271 /* NOTE: must not be iso! */
1272 dev_dbg (dummy_dev(dum
), "ep %s halted, urb %p\n",
1277 /* FIXME make sure both ends agree on maxpacket */
1279 /* handle control requests */
1280 if (ep
== &dum
->ep
[0] && ep
->setup_stage
) {
1281 struct usb_ctrlrequest setup
;
1283 struct dummy_ep
*ep2
;
1287 setup
= *(struct usb_ctrlrequest
*) urb
->setup_packet
;
1288 w_index
= le16_to_cpu(setup
.wIndex
);
1289 w_value
= le16_to_cpu(setup
.wValue
);
1290 if (le16_to_cpu(setup
.wLength
) !=
1291 urb
->transfer_buffer_length
) {
1292 status
= -EOVERFLOW
;
1296 /* paranoia, in case of stale queued data */
1297 list_for_each_entry (req
, &ep
->queue
, queue
) {
1298 list_del_init (&req
->queue
);
1299 req
->req
.status
= -EOVERFLOW
;
1300 dev_dbg (udc_dev(dum
), "stale req = %p\n",
1303 spin_unlock (&dum
->lock
);
1304 req
->req
.complete (&ep
->ep
, &req
->req
);
1305 spin_lock (&dum
->lock
);
1306 ep
->already_seen
= 0;
1310 /* gadget driver never sees set_address or operations
1311 * on standard feature flags. some hardware doesn't
1314 ep
->last_io
= jiffies
;
1315 ep
->setup_stage
= 0;
1317 switch (setup
.bRequest
) {
1318 case USB_REQ_SET_ADDRESS
:
1319 if (setup
.bRequestType
!= Dev_Request
)
1321 dum
->address
= w_value
;
1323 dev_dbg (udc_dev(dum
), "set_address = %d\n",
1327 case USB_REQ_SET_FEATURE
:
1328 if (setup
.bRequestType
== Dev_Request
) {
1331 case USB_DEVICE_REMOTE_WAKEUP
:
1333 case USB_DEVICE_B_HNP_ENABLE
:
1334 dum
->gadget
.b_hnp_enable
= 1;
1336 case USB_DEVICE_A_HNP_SUPPORT
:
1337 dum
->gadget
.a_hnp_support
= 1;
1339 case USB_DEVICE_A_ALT_HNP_SUPPORT
:
1340 dum
->gadget
.a_alt_hnp_support
1344 value
= -EOPNOTSUPP
;
1352 } else if (setup
.bRequestType
== Ep_Request
) {
1354 ep2
= find_endpoint (dum
, w_index
);
1356 value
= -EOPNOTSUPP
;
1364 case USB_REQ_CLEAR_FEATURE
:
1365 if (setup
.bRequestType
== Dev_Request
) {
1367 case USB_DEVICE_REMOTE_WAKEUP
:
1368 dum
->devstatus
&= ~(1 <<
1369 USB_DEVICE_REMOTE_WAKEUP
);
1374 value
= -EOPNOTSUPP
;
1377 } else if (setup
.bRequestType
== Ep_Request
) {
1379 ep2
= find_endpoint (dum
, w_index
);
1381 value
= -EOPNOTSUPP
;
1389 case USB_REQ_GET_STATUS
:
1390 if (setup
.bRequestType
== Dev_InRequest
1391 || setup
.bRequestType
1393 || setup
.bRequestType
1398 // device: remote wakeup, selfpowered
1399 // interface: nothing
1401 buf
= (char *)urb
->transfer_buffer
;
1402 if (urb
->transfer_buffer_length
> 0) {
1403 if (setup
.bRequestType
==
1405 ep2
= find_endpoint (dum
, w_index
);
1407 value
= -EOPNOTSUPP
;
1410 buf
[0] = ep2
->halted
;
1411 } else if (setup
.bRequestType
==
1418 if (urb
->transfer_buffer_length
> 1)
1420 urb
->actual_length
= min (2,
1421 urb
->transfer_buffer_length
);
1428 /* gadget driver handles all other requests. block
1429 * until setup() returns; no reentrancy issues etc.
1432 spin_unlock (&dum
->lock
);
1433 value
= dum
->driver
->setup (&dum
->gadget
,
1435 spin_lock (&dum
->lock
);
1438 /* no delays (max 64KB data stage) */
1440 goto treat_control_like_bulk
;
1442 /* error, see below */
1446 if (value
!= -EOPNOTSUPP
)
1447 dev_dbg (udc_dev(dum
),
1451 urb
->actual_length
= 0;
1457 /* non-control requests */
1459 switch (usb_pipetype (urb
->pipe
)) {
1460 case PIPE_ISOCHRONOUS
:
1461 /* FIXME is it urb->interval since the last xfer?
1462 * use urb->iso_frame_desc[i].
1463 * complete whether or not ep has requests queued.
1464 * report random errors, to debug drivers.
1466 limit
= max (limit
, periodic_bytes (dum
, ep
));
1470 case PIPE_INTERRUPT
:
1471 /* FIXME is it urb->interval since the last xfer?
1472 * this almost certainly polls too fast.
1474 limit
= max (limit
, periodic_bytes (dum
, ep
));
1477 // case PIPE_BULK: case PIPE_CONTROL:
1479 treat_control_like_bulk
:
1480 ep
->last_io
= jiffies
;
1481 total
= transfer(dum
, urb
, ep
, limit
, &status
);
1485 /* incomplete transfer? */
1486 if (status
== -EINPROGRESS
)
1490 list_del (&urbp
->urbp_list
);
1493 ep
->already_seen
= ep
->setup_stage
= 0;
1495 usb_hcd_unlink_urb_from_ep(dummy_to_hcd(dum
), urb
);
1496 spin_unlock (&dum
->lock
);
1497 usb_hcd_giveback_urb(dummy_to_hcd(dum
), urb
, status
);
1498 spin_lock (&dum
->lock
);
1503 if (list_empty (&dum
->urbp_list
)) {
1504 usb_put_dev (dum
->udev
);
1506 } else if (dum
->rh_state
== DUMMY_RH_RUNNING
) {
1507 /* want a 1 msec delay here */
1508 mod_timer (&dum
->timer
, jiffies
+ msecs_to_jiffies(1));
1511 spin_unlock_irqrestore (&dum
->lock
, flags
);
1514 /*-------------------------------------------------------------------------*/
1516 #define PORT_C_MASK \
1517 ((USB_PORT_STAT_C_CONNECTION \
1518 | USB_PORT_STAT_C_ENABLE \
1519 | USB_PORT_STAT_C_SUSPEND \
1520 | USB_PORT_STAT_C_OVERCURRENT \
1521 | USB_PORT_STAT_C_RESET) << 16)
1523 static int dummy_hub_status (struct usb_hcd
*hcd
, char *buf
)
1526 unsigned long flags
;
1529 dum
= hcd_to_dummy (hcd
);
1531 spin_lock_irqsave (&dum
->lock
, flags
);
1532 if (!test_bit(HCD_FLAG_HW_ACCESSIBLE
, &hcd
->flags
))
1535 if (dum
->resuming
&& time_after_eq (jiffies
, dum
->re_timeout
)) {
1536 dum
->port_status
|= (USB_PORT_STAT_C_SUSPEND
<< 16);
1537 dum
->port_status
&= ~USB_PORT_STAT_SUSPEND
;
1538 set_link_state (dum
);
1541 if ((dum
->port_status
& PORT_C_MASK
) != 0) {
1543 dev_dbg (dummy_dev(dum
), "port status 0x%08x has changes\n",
1546 if (dum
->rh_state
== DUMMY_RH_SUSPENDED
)
1547 usb_hcd_resume_root_hub (hcd
);
1550 spin_unlock_irqrestore (&dum
->lock
, flags
);
1555 hub_descriptor (struct usb_hub_descriptor
*desc
)
1557 memset (desc
, 0, sizeof *desc
);
1558 desc
->bDescriptorType
= 0x29;
1559 desc
->bDescLength
= 9;
1560 desc
->wHubCharacteristics
= (__force __u16
)
1561 (__constant_cpu_to_le16 (0x0001));
1562 desc
->bNbrPorts
= 1;
1563 desc
->bitmap
[0] = 0xff;
1564 desc
->bitmap
[1] = 0xff;
1567 static int dummy_hub_control (
1568 struct usb_hcd
*hcd
,
1577 unsigned long flags
;
1579 if (!test_bit(HCD_FLAG_HW_ACCESSIBLE
, &hcd
->flags
))
1582 dum
= hcd_to_dummy (hcd
);
1583 spin_lock_irqsave (&dum
->lock
, flags
);
1585 case ClearHubFeature
:
1587 case ClearPortFeature
:
1589 case USB_PORT_FEAT_SUSPEND
:
1590 if (dum
->port_status
& USB_PORT_STAT_SUSPEND
) {
1591 /* 20msec resume signaling */
1593 dum
->re_timeout
= jiffies
+
1594 msecs_to_jiffies(20);
1597 case USB_PORT_FEAT_POWER
:
1598 if (dum
->port_status
& USB_PORT_STAT_POWER
)
1599 dev_dbg (dummy_dev(dum
), "power-off\n");
1602 dum
->port_status
&= ~(1 << wValue
);
1603 set_link_state (dum
);
1606 case GetHubDescriptor
:
1607 hub_descriptor ((struct usb_hub_descriptor
*) buf
);
1610 *(__le32
*) buf
= __constant_cpu_to_le32 (0);
1616 /* whoever resets or resumes must GetPortStatus to
1619 if (dum
->resuming
&&
1620 time_after_eq (jiffies
, dum
->re_timeout
)) {
1621 dum
->port_status
|= (USB_PORT_STAT_C_SUSPEND
<< 16);
1622 dum
->port_status
&= ~USB_PORT_STAT_SUSPEND
;
1624 if ((dum
->port_status
& USB_PORT_STAT_RESET
) != 0 &&
1625 time_after_eq (jiffies
, dum
->re_timeout
)) {
1626 dum
->port_status
|= (USB_PORT_STAT_C_RESET
<< 16);
1627 dum
->port_status
&= ~USB_PORT_STAT_RESET
;
1629 dum
->port_status
|= USB_PORT_STAT_ENABLE
;
1630 /* give it the best speed we agree on */
1631 dum
->gadget
.speed
= dum
->driver
->speed
;
1632 dum
->gadget
.ep0
->maxpacket
= 64;
1633 switch (dum
->gadget
.speed
) {
1634 case USB_SPEED_HIGH
:
1636 USB_PORT_STAT_HIGH_SPEED
;
1639 dum
->gadget
.ep0
->maxpacket
= 8;
1641 USB_PORT_STAT_LOW_SPEED
;
1644 dum
->gadget
.speed
= USB_SPEED_FULL
;
1649 set_link_state (dum
);
1650 ((__le16
*) buf
)[0] = cpu_to_le16 (dum
->port_status
);
1651 ((__le16
*) buf
)[1] = cpu_to_le16 (dum
->port_status
>> 16);
1656 case SetPortFeature
:
1658 case USB_PORT_FEAT_SUSPEND
:
1660 dum
->port_status
|= USB_PORT_STAT_SUSPEND
;
1662 /* HNP would happen here; for now we
1663 * assume b_bus_req is always true.
1665 set_link_state (dum
);
1666 if (((1 << USB_DEVICE_B_HNP_ENABLE
)
1667 & dum
->devstatus
) != 0)
1668 dev_dbg (dummy_dev(dum
),
1672 case USB_PORT_FEAT_POWER
:
1673 dum
->port_status
|= USB_PORT_STAT_POWER
;
1674 set_link_state (dum
);
1676 case USB_PORT_FEAT_RESET
:
1677 /* if it's already enabled, disable */
1678 dum
->port_status
&= ~(USB_PORT_STAT_ENABLE
1679 | USB_PORT_STAT_LOW_SPEED
1680 | USB_PORT_STAT_HIGH_SPEED
);
1682 /* 50msec reset signaling */
1683 dum
->re_timeout
= jiffies
+ msecs_to_jiffies(50);
1686 if ((dum
->port_status
& USB_PORT_STAT_POWER
) != 0) {
1687 dum
->port_status
|= (1 << wValue
);
1688 set_link_state (dum
);
1694 dev_dbg (dummy_dev(dum
),
1695 "hub control req%04x v%04x i%04x l%d\n",
1696 typeReq
, wValue
, wIndex
, wLength
);
1698 /* "protocol stall" on error */
1701 spin_unlock_irqrestore (&dum
->lock
, flags
);
1703 if ((dum
->port_status
& PORT_C_MASK
) != 0)
1704 usb_hcd_poll_rh_status (hcd
);
1708 static int dummy_bus_suspend (struct usb_hcd
*hcd
)
1710 struct dummy
*dum
= hcd_to_dummy (hcd
);
1712 dev_dbg (&hcd
->self
.root_hub
->dev
, "%s\n", __FUNCTION__
);
1714 spin_lock_irq (&dum
->lock
);
1715 dum
->rh_state
= DUMMY_RH_SUSPENDED
;
1716 set_link_state (dum
);
1717 hcd
->state
= HC_STATE_SUSPENDED
;
1718 spin_unlock_irq (&dum
->lock
);
1722 static int dummy_bus_resume (struct usb_hcd
*hcd
)
1724 struct dummy
*dum
= hcd_to_dummy (hcd
);
1727 dev_dbg (&hcd
->self
.root_hub
->dev
, "%s\n", __FUNCTION__
);
1729 spin_lock_irq (&dum
->lock
);
1730 if (!test_bit(HCD_FLAG_HW_ACCESSIBLE
, &hcd
->flags
)) {
1733 dum
->rh_state
= DUMMY_RH_RUNNING
;
1734 set_link_state (dum
);
1735 if (!list_empty(&dum
->urbp_list
))
1736 mod_timer (&dum
->timer
, jiffies
);
1737 hcd
->state
= HC_STATE_RUNNING
;
1739 spin_unlock_irq (&dum
->lock
);
1743 /*-------------------------------------------------------------------------*/
1745 static inline ssize_t
1746 show_urb (char *buf
, size_t size
, struct urb
*urb
)
1748 int ep
= usb_pipeendpoint (urb
->pipe
);
1750 return snprintf (buf
, size
,
1751 "urb/%p %s ep%d%s%s len %d/%d\n",
1754 switch (urb
->dev
->speed
) {
1755 case USB_SPEED_LOW
: s
= "ls"; break;
1756 case USB_SPEED_FULL
: s
= "fs"; break;
1757 case USB_SPEED_HIGH
: s
= "hs"; break;
1758 default: s
= "?"; break;
1760 ep
, ep
? (usb_pipein (urb
->pipe
) ? "in" : "out") : "",
1762 switch (usb_pipetype (urb
->pipe
)) { \
1763 case PIPE_CONTROL
: s
= ""; break; \
1764 case PIPE_BULK
: s
= "-bulk"; break; \
1765 case PIPE_INTERRUPT
: s
= "-int"; break; \
1766 default: s
= "-iso"; break; \
1768 urb
->actual_length
, urb
->transfer_buffer_length
);
1772 show_urbs (struct device
*dev
, struct device_attribute
*attr
, char *buf
)
1774 struct usb_hcd
*hcd
= dev_get_drvdata (dev
);
1775 struct dummy
*dum
= hcd_to_dummy (hcd
);
1778 unsigned long flags
;
1780 spin_lock_irqsave (&dum
->lock
, flags
);
1781 list_for_each_entry (urbp
, &dum
->urbp_list
, urbp_list
) {
1784 temp
= show_urb (buf
, PAGE_SIZE
- size
, urbp
->urb
);
1788 spin_unlock_irqrestore (&dum
->lock
, flags
);
1792 static DEVICE_ATTR (urbs
, S_IRUGO
, show_urbs
, NULL
);
1794 static int dummy_start (struct usb_hcd
*hcd
)
1798 dum
= hcd_to_dummy (hcd
);
1801 * MASTER side init ... we emulate a root hub that'll only ever
1802 * talk to one device (the slave side). Also appears in sysfs,
1803 * just like more familiar pci-based HCDs.
1805 spin_lock_init (&dum
->lock
);
1806 init_timer (&dum
->timer
);
1807 dum
->timer
.function
= dummy_timer
;
1808 dum
->timer
.data
= (unsigned long) dum
;
1809 dum
->rh_state
= DUMMY_RH_RUNNING
;
1811 INIT_LIST_HEAD (&dum
->urbp_list
);
1813 hcd
->power_budget
= POWER_BUDGET
;
1814 hcd
->state
= HC_STATE_RUNNING
;
1815 hcd
->uses_new_polling
= 1;
1817 #ifdef CONFIG_USB_OTG
1818 hcd
->self
.otg_port
= 1;
1821 /* FIXME 'urbs' should be a per-device thing, maybe in usbcore */
1822 return device_create_file (dummy_dev(dum
), &dev_attr_urbs
);
1825 static void dummy_stop (struct usb_hcd
*hcd
)
1829 dum
= hcd_to_dummy (hcd
);
1831 device_remove_file (dummy_dev(dum
), &dev_attr_urbs
);
1832 usb_gadget_unregister_driver (dum
->driver
);
1833 dev_info (dummy_dev(dum
), "stopped\n");
1836 /*-------------------------------------------------------------------------*/
1838 static int dummy_h_get_frame (struct usb_hcd
*hcd
)
1840 return dummy_g_get_frame (NULL
);
1843 static const struct hc_driver dummy_hcd
= {
1844 .description
= (char *) driver_name
,
1845 .product_desc
= "Dummy host controller",
1846 .hcd_priv_size
= sizeof(struct dummy
),
1850 .start
= dummy_start
,
1853 .urb_enqueue
= dummy_urb_enqueue
,
1854 .urb_dequeue
= dummy_urb_dequeue
,
1856 .get_frame_number
= dummy_h_get_frame
,
1858 .hub_status_data
= dummy_hub_status
,
1859 .hub_control
= dummy_hub_control
,
1860 .bus_suspend
= dummy_bus_suspend
,
1861 .bus_resume
= dummy_bus_resume
,
1864 static int dummy_hcd_probe(struct platform_device
*pdev
)
1866 struct usb_hcd
*hcd
;
1869 dev_info(&pdev
->dev
, "%s, driver " DRIVER_VERSION
"\n", driver_desc
);
1871 hcd
= usb_create_hcd(&dummy_hcd
, &pdev
->dev
, pdev
->dev
.bus_id
);
1874 the_controller
= hcd_to_dummy (hcd
);
1876 retval
= usb_add_hcd(hcd
, 0, 0);
1879 the_controller
= NULL
;
1884 static int dummy_hcd_remove (struct platform_device
*pdev
)
1886 struct usb_hcd
*hcd
;
1888 hcd
= platform_get_drvdata (pdev
);
1889 usb_remove_hcd (hcd
);
1891 the_controller
= NULL
;
1895 static int dummy_hcd_suspend (struct platform_device
*pdev
, pm_message_t state
)
1897 struct usb_hcd
*hcd
;
1901 dev_dbg (&pdev
->dev
, "%s\n", __FUNCTION__
);
1903 hcd
= platform_get_drvdata (pdev
);
1904 dum
= hcd_to_dummy (hcd
);
1905 if (dum
->rh_state
== DUMMY_RH_RUNNING
) {
1906 dev_warn(&pdev
->dev
, "Root hub isn't suspended!\n");
1909 clear_bit(HCD_FLAG_HW_ACCESSIBLE
, &hcd
->flags
);
1913 static int dummy_hcd_resume (struct platform_device
*pdev
)
1915 struct usb_hcd
*hcd
;
1917 dev_dbg (&pdev
->dev
, "%s\n", __FUNCTION__
);
1919 hcd
= platform_get_drvdata (pdev
);
1920 set_bit(HCD_FLAG_HW_ACCESSIBLE
, &hcd
->flags
);
1921 usb_hcd_poll_rh_status (hcd
);
1925 static struct platform_driver dummy_hcd_driver
= {
1926 .probe
= dummy_hcd_probe
,
1927 .remove
= dummy_hcd_remove
,
1928 .suspend
= dummy_hcd_suspend
,
1929 .resume
= dummy_hcd_resume
,
1931 .name
= (char *) driver_name
,
1932 .owner
= THIS_MODULE
,
1936 /*-------------------------------------------------------------------------*/
1938 /* These don't need to do anything because the pdev structures are
1939 * statically allocated. */
1941 dummy_udc_release (struct device
*dev
) {}
1944 dummy_hcd_release (struct device
*dev
) {}
1946 static struct platform_device the_udc_pdev
= {
1947 .name
= (char *) gadget_name
,
1950 .release
= dummy_udc_release
,
1954 static struct platform_device the_hcd_pdev
= {
1955 .name
= (char *) driver_name
,
1958 .release
= dummy_hcd_release
,
1962 static int __init
init (void)
1966 if (usb_disabled ())
1969 retval
= platform_driver_register (&dummy_hcd_driver
);
1973 retval
= platform_driver_register (&dummy_udc_driver
);
1975 goto err_register_udc_driver
;
1977 retval
= platform_device_register (&the_hcd_pdev
);
1979 goto err_register_hcd
;
1981 retval
= platform_device_register (&the_udc_pdev
);
1983 goto err_register_udc
;
1987 platform_device_unregister (&the_hcd_pdev
);
1989 platform_driver_unregister (&dummy_udc_driver
);
1990 err_register_udc_driver
:
1991 platform_driver_unregister (&dummy_hcd_driver
);
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
);