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.
39 #include <linux/module.h>
40 #include <linux/kernel.h>
41 #include <linux/delay.h>
42 #include <linux/ioport.h>
43 #include <linux/slab.h>
44 #include <linux/errno.h>
45 #include <linux/init.h>
46 #include <linux/timer.h>
47 #include <linux/list.h>
48 #include <linux/interrupt.h>
49 #include <linux/platform_device.h>
50 #include <linux/usb.h>
51 #include <linux/usb_gadget.h>
53 #include <asm/byteorder.h>
56 #include <asm/system.h>
57 #include <asm/unaligned.h>
60 #include "../core/hcd.h"
63 #define DRIVER_DESC "USB Host+Gadget Emulator"
64 #define DRIVER_VERSION "02 May 2005"
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
));
511 ep
= usb_ep_to_dummy_ep (_ep
);
512 dum
= ep_to_dummy (ep
);
516 retval
= kmalloc (bytes
, mem_flags
);
517 *dma
= (dma_addr_t
) retval
;
533 fifo_complete (struct usb_ep
*ep
, struct usb_request
*req
)
538 dummy_queue (struct usb_ep
*_ep
, struct usb_request
*_req
,
542 struct dummy_request
*req
;
546 req
= usb_request_to_dummy_request (_req
);
547 if (!_req
|| !list_empty (&req
->queue
) || !_req
->complete
)
550 ep
= usb_ep_to_dummy_ep (_ep
);
551 if (!_ep
|| (!ep
->desc
&& _ep
->name
!= ep0name
))
554 dum
= ep_to_dummy (ep
);
555 if (!dum
->driver
|| !is_enabled (dum
))
559 dev_dbg (udc_dev(dum
), "ep %p queue req %p to %s, len %d buf %p\n",
560 ep
, _req
, _ep
->name
, _req
->length
, _req
->buf
);
563 _req
->status
= -EINPROGRESS
;
565 spin_lock_irqsave (&dum
->lock
, flags
);
567 /* implement an emulated single-request FIFO */
568 if (ep
->desc
&& (ep
->desc
->bEndpointAddress
& USB_DIR_IN
) &&
569 list_empty (&dum
->fifo_req
.queue
) &&
570 list_empty (&ep
->queue
) &&
571 _req
->length
<= FIFO_SIZE
) {
572 req
= &dum
->fifo_req
;
574 req
->req
.buf
= dum
->fifo_buf
;
575 memcpy (dum
->fifo_buf
, _req
->buf
, _req
->length
);
576 req
->req
.context
= dum
;
577 req
->req
.complete
= fifo_complete
;
579 spin_unlock (&dum
->lock
);
580 _req
->actual
= _req
->length
;
582 _req
->complete (_ep
, _req
);
583 spin_lock (&dum
->lock
);
585 list_add_tail (&req
->queue
, &ep
->queue
);
586 spin_unlock_irqrestore (&dum
->lock
, flags
);
588 /* real hardware would likely enable transfers here, in case
589 * it'd been left NAKing.
594 static int dummy_dequeue (struct usb_ep
*_ep
, struct usb_request
*_req
)
598 int retval
= -EINVAL
;
600 struct dummy_request
*req
= NULL
;
604 ep
= usb_ep_to_dummy_ep (_ep
);
605 dum
= ep_to_dummy (ep
);
610 local_irq_save (flags
);
611 spin_lock (&dum
->lock
);
612 list_for_each_entry (req
, &ep
->queue
, queue
) {
613 if (&req
->req
== _req
) {
614 list_del_init (&req
->queue
);
615 _req
->status
= -ECONNRESET
;
620 spin_unlock (&dum
->lock
);
623 dev_dbg (udc_dev(dum
),
624 "dequeued req %p from %s, len %d buf %p\n",
625 req
, _ep
->name
, _req
->length
, _req
->buf
);
626 _req
->complete (_ep
, _req
);
628 local_irq_restore (flags
);
633 dummy_set_halt (struct usb_ep
*_ep
, int value
)
640 ep
= usb_ep_to_dummy_ep (_ep
);
641 dum
= ep_to_dummy (ep
);
646 else if (ep
->desc
&& (ep
->desc
->bEndpointAddress
& USB_DIR_IN
) &&
647 !list_empty (&ep
->queue
))
651 /* FIXME clear emulated data toggle too */
655 static const struct usb_ep_ops dummy_ep_ops
= {
656 .enable
= dummy_enable
,
657 .disable
= dummy_disable
,
659 .alloc_request
= dummy_alloc_request
,
660 .free_request
= dummy_free_request
,
662 .alloc_buffer
= dummy_alloc_buffer
,
663 .free_buffer
= dummy_free_buffer
,
664 /* map, unmap, ... eventually hook the "generic" dma calls */
666 .queue
= dummy_queue
,
667 .dequeue
= dummy_dequeue
,
669 .set_halt
= dummy_set_halt
,
672 /*-------------------------------------------------------------------------*/
674 /* there are both host and device side versions of this call ... */
675 static int dummy_g_get_frame (struct usb_gadget
*_gadget
)
679 do_gettimeofday (&tv
);
680 return tv
.tv_usec
/ 1000;
683 static int dummy_wakeup (struct usb_gadget
*_gadget
)
687 dum
= gadget_to_dummy (_gadget
);
688 if (!(dum
->devstatus
& ( (1 << USB_DEVICE_B_HNP_ENABLE
)
689 | (1 << USB_DEVICE_REMOTE_WAKEUP
))))
691 if ((dum
->port_status
& USB_PORT_STAT_CONNECTION
) == 0)
693 if ((dum
->port_status
& USB_PORT_STAT_SUSPEND
) == 0 &&
694 dum
->rh_state
!= DUMMY_RH_SUSPENDED
)
697 /* FIXME: What if the root hub is suspended but the port isn't? */
699 /* hub notices our request, issues downstream resume, etc */
701 dum
->re_timeout
= jiffies
+ msecs_to_jiffies(20);
702 mod_timer (&dummy_to_hcd (dum
)->rh_timer
, dum
->re_timeout
);
706 static int dummy_set_selfpowered (struct usb_gadget
*_gadget
, int value
)
710 dum
= gadget_to_dummy (_gadget
);
712 dum
->devstatus
|= (1 << USB_DEVICE_SELF_POWERED
);
714 dum
->devstatus
&= ~(1 << USB_DEVICE_SELF_POWERED
);
718 static int dummy_pullup (struct usb_gadget
*_gadget
, int value
)
723 dum
= gadget_to_dummy (_gadget
);
724 spin_lock_irqsave (&dum
->lock
, flags
);
725 dum
->pullup
= (value
!= 0);
726 set_link_state (dum
);
727 spin_unlock_irqrestore (&dum
->lock
, flags
);
729 usb_hcd_poll_rh_status (dummy_to_hcd (dum
));
733 static const struct usb_gadget_ops dummy_ops
= {
734 .get_frame
= dummy_g_get_frame
,
735 .wakeup
= dummy_wakeup
,
736 .set_selfpowered
= dummy_set_selfpowered
,
737 .pullup
= dummy_pullup
,
740 /*-------------------------------------------------------------------------*/
742 /* "function" sysfs attribute */
744 show_function (struct device
*dev
, struct device_attribute
*attr
, char *buf
)
746 struct dummy
*dum
= gadget_dev_to_dummy (dev
);
748 if (!dum
->driver
|| !dum
->driver
->function
)
750 return scnprintf (buf
, PAGE_SIZE
, "%s\n", dum
->driver
->function
);
752 static DEVICE_ATTR (function
, S_IRUGO
, show_function
, NULL
);
754 /*-------------------------------------------------------------------------*/
757 * Driver registration/unregistration.
759 * This is basically hardware-specific; there's usually only one real USB
760 * device (not host) controller since that's how USB devices are intended
761 * to work. So most implementations of these api calls will rely on the
762 * fact that only one driver will ever bind to the hardware. But curious
763 * hardware can be built with discrete components, so the gadget API doesn't
764 * require that assumption.
766 * For this emulator, it might be convenient to create a usb slave device
767 * for each driver that registers: just add to a big root hub.
771 usb_gadget_register_driver (struct usb_gadget_driver
*driver
)
773 struct dummy
*dum
= the_controller
;
780 if (!driver
->bind
|| !driver
->setup
781 || driver
->speed
== USB_SPEED_UNKNOWN
)
785 * SLAVE side init ... the layer above hardware, which
786 * can't enumerate without help from the driver we're binding.
791 INIT_LIST_HEAD (&dum
->gadget
.ep_list
);
792 for (i
= 0; i
< DUMMY_ENDPOINTS
; i
++) {
793 struct dummy_ep
*ep
= &dum
->ep
[i
];
797 ep
->ep
.name
= ep_name
[i
];
798 ep
->ep
.ops
= &dummy_ep_ops
;
799 list_add_tail (&ep
->ep
.ep_list
, &dum
->gadget
.ep_list
);
800 ep
->halted
= ep
->already_seen
= ep
->setup_stage
= 0;
801 ep
->ep
.maxpacket
= ~0;
802 ep
->last_io
= jiffies
;
803 ep
->gadget
= &dum
->gadget
;
805 INIT_LIST_HEAD (&ep
->queue
);
808 dum
->gadget
.ep0
= &dum
->ep
[0].ep
;
809 dum
->ep
[0].ep
.maxpacket
= 64;
810 list_del_init (&dum
->ep
[0].ep
.ep_list
);
811 INIT_LIST_HEAD(&dum
->fifo_req
.queue
);
813 dum
->driver
= driver
;
814 dum
->gadget
.dev
.driver
= &driver
->driver
;
815 dev_dbg (udc_dev(dum
), "binding gadget driver '%s'\n",
816 driver
->driver
.name
);
817 if ((retval
= driver
->bind (&dum
->gadget
)) != 0)
818 goto err_bind_gadget
;
820 driver
->driver
.bus
= dum
->gadget
.dev
.parent
->bus
;
821 if ((retval
= driver_register (&driver
->driver
)) != 0)
823 if ((retval
= device_bind_driver (&dum
->gadget
.dev
)) != 0)
824 goto err_bind_driver
;
826 /* khubd will enumerate this in a while */
827 spin_lock_irq (&dum
->lock
);
829 set_link_state (dum
);
830 spin_unlock_irq (&dum
->lock
);
832 usb_hcd_poll_rh_status (dummy_to_hcd (dum
));
836 driver_unregister (&driver
->driver
);
839 driver
->unbind (&dum
->gadget
);
840 spin_lock_irq (&dum
->lock
);
842 set_link_state (dum
);
843 spin_unlock_irq (&dum
->lock
);
846 dum
->gadget
.dev
.driver
= NULL
;
849 EXPORT_SYMBOL (usb_gadget_register_driver
);
852 usb_gadget_unregister_driver (struct usb_gadget_driver
*driver
)
854 struct dummy
*dum
= the_controller
;
859 if (!driver
|| driver
!= dum
->driver
|| !driver
->unbind
)
862 dev_dbg (udc_dev(dum
), "unregister gadget driver '%s'\n",
863 driver
->driver
.name
);
865 spin_lock_irqsave (&dum
->lock
, flags
);
867 set_link_state (dum
);
868 spin_unlock_irqrestore (&dum
->lock
, flags
);
870 driver
->unbind (&dum
->gadget
);
873 device_release_driver (&dum
->gadget
.dev
);
874 driver_unregister (&driver
->driver
);
876 spin_lock_irqsave (&dum
->lock
, flags
);
878 set_link_state (dum
);
879 spin_unlock_irqrestore (&dum
->lock
, flags
);
881 usb_hcd_poll_rh_status (dummy_to_hcd (dum
));
884 EXPORT_SYMBOL (usb_gadget_unregister_driver
);
888 /* just declare this in any driver that really need it */
889 extern int net2280_set_fifo_mode (struct usb_gadget
*gadget
, int mode
);
891 int net2280_set_fifo_mode (struct usb_gadget
*gadget
, int mode
)
895 EXPORT_SYMBOL (net2280_set_fifo_mode
);
898 /* The gadget structure is stored inside the hcd structure and will be
899 * released along with it. */
901 dummy_gadget_release (struct device
*dev
)
903 struct dummy
*dum
= gadget_dev_to_dummy (dev
);
905 usb_put_hcd (dummy_to_hcd (dum
));
908 static int dummy_udc_probe (struct platform_device
*pdev
)
910 struct dummy
*dum
= the_controller
;
913 dum
->gadget
.name
= gadget_name
;
914 dum
->gadget
.ops
= &dummy_ops
;
915 dum
->gadget
.is_dualspeed
= 1;
917 /* maybe claim OTG support, though we won't complete HNP */
918 dum
->gadget
.is_otg
= (dummy_to_hcd(dum
)->self
.otg_port
!= 0);
920 strcpy (dum
->gadget
.dev
.bus_id
, "gadget");
921 dum
->gadget
.dev
.parent
= &pdev
->dev
;
922 dum
->gadget
.dev
.release
= dummy_gadget_release
;
923 rc
= device_register (&dum
->gadget
.dev
);
927 usb_get_hcd (dummy_to_hcd (dum
));
929 platform_set_drvdata (pdev
, dum
);
930 rc
= device_create_file (&dum
->gadget
.dev
, &dev_attr_function
);
932 device_unregister (&dum
->gadget
.dev
);
936 static int dummy_udc_remove (struct platform_device
*pdev
)
938 struct dummy
*dum
= platform_get_drvdata (pdev
);
940 platform_set_drvdata (pdev
, NULL
);
941 device_remove_file (&dum
->gadget
.dev
, &dev_attr_function
);
942 device_unregister (&dum
->gadget
.dev
);
946 static int dummy_udc_suspend (struct platform_device
*pdev
, pm_message_t state
)
948 struct dummy
*dum
= platform_get_drvdata(pdev
);
950 dev_dbg (&pdev
->dev
, "%s\n", __FUNCTION__
);
951 spin_lock_irq (&dum
->lock
);
952 dum
->udc_suspended
= 1;
953 set_link_state (dum
);
954 spin_unlock_irq (&dum
->lock
);
956 pdev
->dev
.power
.power_state
= state
;
957 usb_hcd_poll_rh_status (dummy_to_hcd (dum
));
961 static int dummy_udc_resume (struct platform_device
*pdev
)
963 struct dummy
*dum
= platform_get_drvdata(pdev
);
965 dev_dbg (&pdev
->dev
, "%s\n", __FUNCTION__
);
966 spin_lock_irq (&dum
->lock
);
967 dum
->udc_suspended
= 0;
968 set_link_state (dum
);
969 spin_unlock_irq (&dum
->lock
);
971 pdev
->dev
.power
.power_state
= PMSG_ON
;
972 usb_hcd_poll_rh_status (dummy_to_hcd (dum
));
976 static struct platform_driver dummy_udc_driver
= {
977 .probe
= dummy_udc_probe
,
978 .remove
= dummy_udc_remove
,
979 .suspend
= dummy_udc_suspend
,
980 .resume
= dummy_udc_resume
,
982 .name
= (char *) gadget_name
,
983 .owner
= THIS_MODULE
,
987 /*-------------------------------------------------------------------------*/
989 /* MASTER/HOST SIDE DRIVER
991 * this uses the hcd framework to hook up to host side drivers.
992 * its root hub will only have one device, otherwise it acts like
993 * a normal host controller.
995 * when urbs are queued, they're just stuck on a list that we
996 * scan in a timer callback. that callback connects writes from
997 * the host with reads from the device, and so on, based on the
1001 static int dummy_urb_enqueue (
1002 struct usb_hcd
*hcd
,
1003 struct usb_host_endpoint
*ep
,
1009 unsigned long flags
;
1011 if (!urb
->transfer_buffer
&& urb
->transfer_buffer_length
)
1014 urbp
= kmalloc (sizeof *urbp
, mem_flags
);
1019 dum
= hcd_to_dummy (hcd
);
1020 spin_lock_irqsave (&dum
->lock
, flags
);
1023 dum
->udev
= urb
->dev
;
1024 usb_get_dev (dum
->udev
);
1025 } else if (unlikely (dum
->udev
!= urb
->dev
))
1026 dev_err (dummy_dev(dum
), "usb_device address has changed!\n");
1028 list_add_tail (&urbp
->urbp_list
, &dum
->urbp_list
);
1030 if (usb_pipetype (urb
->pipe
) == PIPE_CONTROL
)
1031 urb
->error_count
= 1; /* mark as a new urb */
1033 /* kick the scheduler, it'll do the rest */
1034 if (!timer_pending (&dum
->timer
))
1035 mod_timer (&dum
->timer
, jiffies
+ 1);
1037 spin_unlock_irqrestore (&dum
->lock
, flags
);
1041 static int dummy_urb_dequeue (struct usb_hcd
*hcd
, struct urb
*urb
)
1044 unsigned long flags
;
1046 /* giveback happens automatically in timer callback,
1047 * so make sure the callback happens */
1048 dum
= hcd_to_dummy (hcd
);
1049 spin_lock_irqsave (&dum
->lock
, flags
);
1050 if (dum
->rh_state
!= DUMMY_RH_RUNNING
&& !list_empty(&dum
->urbp_list
))
1051 mod_timer (&dum
->timer
, jiffies
);
1052 spin_unlock_irqrestore (&dum
->lock
, flags
);
1056 static void maybe_set_status (struct urb
*urb
, int status
)
1058 spin_lock (&urb
->lock
);
1059 if (urb
->status
== -EINPROGRESS
)
1060 urb
->status
= status
;
1061 spin_unlock (&urb
->lock
);
1064 /* transfer up to a frame's worth; caller must own lock */
1066 transfer (struct dummy
*dum
, struct urb
*urb
, struct dummy_ep
*ep
, int limit
)
1068 struct dummy_request
*req
;
1071 /* if there's no request queued, the device is NAKing; return */
1072 list_for_each_entry (req
, &ep
->queue
, queue
) {
1073 unsigned host_len
, dev_len
, len
;
1074 int is_short
, to_host
;
1077 /* 1..N packets of ep->ep.maxpacket each ... the last one
1078 * may be short (including zero length).
1080 * writer can send a zlp explicitly (length 0) or implicitly
1081 * (length mod maxpacket zero, and 'zero' flag); they always
1084 host_len
= urb
->transfer_buffer_length
- urb
->actual_length
;
1085 dev_len
= req
->req
.length
- req
->req
.actual
;
1086 len
= min (host_len
, dev_len
);
1088 /* FIXME update emulated data toggle too */
1090 to_host
= usb_pipein (urb
->pipe
);
1091 if (unlikely (len
== 0))
1096 /* not enough bandwidth left? */
1097 if (limit
< ep
->ep
.maxpacket
&& limit
< len
)
1099 len
= min (len
, (unsigned) limit
);
1103 /* use an extra pass for the final short packet */
1104 if (len
> ep
->ep
.maxpacket
) {
1106 len
-= (len
% ep
->ep
.maxpacket
);
1108 is_short
= (len
% ep
->ep
.maxpacket
) != 0;
1110 /* else transfer packet(s) */
1111 ubuf
= urb
->transfer_buffer
+ urb
->actual_length
;
1112 rbuf
= req
->req
.buf
+ req
->req
.actual
;
1114 memcpy (ubuf
, rbuf
, len
);
1116 memcpy (rbuf
, ubuf
, len
);
1117 ep
->last_io
= jiffies
;
1120 urb
->actual_length
+= len
;
1121 req
->req
.actual
+= len
;
1124 /* short packets terminate, maybe with overflow/underflow.
1125 * it's only really an error to write too much.
1127 * partially filling a buffer optionally blocks queue advances
1128 * (so completion handlers can clean up the queue) but we don't
1129 * need to emulate such data-in-flight. so we only show part
1130 * of the URB_SHORT_NOT_OK effect: completion status.
1133 if (host_len
== dev_len
) {
1134 req
->req
.status
= 0;
1135 maybe_set_status (urb
, 0);
1136 } else if (to_host
) {
1137 req
->req
.status
= 0;
1138 if (dev_len
> host_len
)
1139 maybe_set_status (urb
, -EOVERFLOW
);
1141 maybe_set_status (urb
,
1142 (urb
->transfer_flags
1145 } else if (!to_host
) {
1146 maybe_set_status (urb
, 0);
1147 if (host_len
> dev_len
)
1148 req
->req
.status
= -EOVERFLOW
;
1150 req
->req
.status
= 0;
1153 /* many requests terminate without a short packet */
1155 if (req
->req
.length
== req
->req
.actual
1157 req
->req
.status
= 0;
1158 if (urb
->transfer_buffer_length
== urb
->actual_length
1159 && !(urb
->transfer_flags
1160 & URB_ZERO_PACKET
)) {
1161 maybe_set_status (urb
, 0);
1165 /* device side completion --> continuable */
1166 if (req
->req
.status
!= -EINPROGRESS
) {
1167 list_del_init (&req
->queue
);
1169 spin_unlock (&dum
->lock
);
1170 req
->req
.complete (&ep
->ep
, &req
->req
);
1171 spin_lock (&dum
->lock
);
1173 /* requests might have been unlinked... */
1177 /* host side completion --> terminate */
1178 if (urb
->status
!= -EINPROGRESS
)
1181 /* rescan to continue with any other queued i/o */
1188 static int periodic_bytes (struct dummy
*dum
, struct dummy_ep
*ep
)
1190 int limit
= ep
->ep
.maxpacket
;
1192 if (dum
->gadget
.speed
== USB_SPEED_HIGH
) {
1195 /* high bandwidth mode */
1196 tmp
= le16_to_cpu(ep
->desc
->wMaxPacketSize
);
1197 tmp
= (tmp
>> 11) & 0x03;
1198 tmp
*= 8 /* applies to entire frame */;
1199 limit
+= limit
* tmp
;
1204 #define is_active(dum) ((dum->port_status & \
1205 (USB_PORT_STAT_CONNECTION | USB_PORT_STAT_ENABLE | \
1206 USB_PORT_STAT_SUSPEND)) \
1207 == (USB_PORT_STAT_CONNECTION | USB_PORT_STAT_ENABLE))
1209 static struct dummy_ep
*find_endpoint (struct dummy
*dum
, u8 address
)
1213 if (!is_active (dum
))
1215 if ((address
& ~USB_DIR_IN
) == 0)
1216 return &dum
->ep
[0];
1217 for (i
= 1; i
< DUMMY_ENDPOINTS
; i
++) {
1218 struct dummy_ep
*ep
= &dum
->ep
[i
];
1222 if (ep
->desc
->bEndpointAddress
== address
)
1230 #define Dev_Request (USB_TYPE_STANDARD | USB_RECIP_DEVICE)
1231 #define Dev_InRequest (Dev_Request | USB_DIR_IN)
1232 #define Intf_Request (USB_TYPE_STANDARD | USB_RECIP_INTERFACE)
1233 #define Intf_InRequest (Intf_Request | USB_DIR_IN)
1234 #define Ep_Request (USB_TYPE_STANDARD | USB_RECIP_ENDPOINT)
1235 #define Ep_InRequest (Ep_Request | USB_DIR_IN)
1237 /* drive both sides of the transfers; looks like irq handlers to
1238 * both drivers except the callbacks aren't in_irq().
1240 static void dummy_timer (unsigned long _dum
)
1242 struct dummy
*dum
= (struct dummy
*) _dum
;
1243 struct urbp
*urbp
, *tmp
;
1244 unsigned long flags
;
1248 /* simplistic model for one frame's bandwidth */
1249 switch (dum
->gadget
.speed
) {
1251 total
= 8/*bytes*/ * 12/*packets*/;
1253 case USB_SPEED_FULL
:
1254 total
= 64/*bytes*/ * 19/*packets*/;
1256 case USB_SPEED_HIGH
:
1257 total
= 512/*bytes*/ * 13/*packets*/ * 8/*uframes*/;
1260 dev_err (dummy_dev(dum
), "bogus device speed\n");
1264 /* FIXME if HZ != 1000 this will probably misbehave ... */
1266 /* look at each urb queued by the host side driver */
1267 spin_lock_irqsave (&dum
->lock
, flags
);
1270 dev_err (dummy_dev(dum
),
1271 "timer fired with no URBs pending?\n");
1272 spin_unlock_irqrestore (&dum
->lock
, flags
);
1276 for (i
= 0; i
< DUMMY_ENDPOINTS
; i
++) {
1279 dum
->ep
[i
].already_seen
= 0;
1283 list_for_each_entry_safe (urbp
, tmp
, &dum
->urbp_list
, urbp_list
) {
1285 struct dummy_request
*req
;
1287 struct dummy_ep
*ep
= NULL
;
1291 if (urb
->status
!= -EINPROGRESS
) {
1292 /* likely it was just unlinked */
1294 } else if (dum
->rh_state
!= DUMMY_RH_RUNNING
)
1296 type
= usb_pipetype (urb
->pipe
);
1298 /* used up this frame's non-periodic bandwidth?
1299 * FIXME there's infinite bandwidth for control and
1300 * periodic transfers ... unrealistic.
1302 if (total
<= 0 && type
== PIPE_BULK
)
1305 /* find the gadget's ep for this request (if configured) */
1306 address
= usb_pipeendpoint (urb
->pipe
);
1307 if (usb_pipein (urb
->pipe
))
1308 address
|= USB_DIR_IN
;
1309 ep
= find_endpoint(dum
, address
);
1311 /* set_configuration() disagreement */
1312 dev_dbg (dummy_dev(dum
),
1313 "no ep configured for urb %p\n",
1315 maybe_set_status (urb
, -EPROTO
);
1319 if (ep
->already_seen
)
1321 ep
->already_seen
= 1;
1322 if (ep
== &dum
->ep
[0] && urb
->error_count
) {
1323 ep
->setup_stage
= 1; /* a new urb */
1324 urb
->error_count
= 0;
1326 if (ep
->halted
&& !ep
->setup_stage
) {
1327 /* NOTE: must not be iso! */
1328 dev_dbg (dummy_dev(dum
), "ep %s halted, urb %p\n",
1330 maybe_set_status (urb
, -EPIPE
);
1333 /* FIXME make sure both ends agree on maxpacket */
1335 /* handle control requests */
1336 if (ep
== &dum
->ep
[0] && ep
->setup_stage
) {
1337 struct usb_ctrlrequest setup
;
1339 struct dummy_ep
*ep2
;
1343 setup
= *(struct usb_ctrlrequest
*) urb
->setup_packet
;
1344 w_index
= le16_to_cpu(setup
.wIndex
);
1345 w_value
= le16_to_cpu(setup
.wValue
);
1346 if (le16_to_cpu(setup
.wLength
) !=
1347 urb
->transfer_buffer_length
) {
1348 maybe_set_status (urb
, -EOVERFLOW
);
1352 /* paranoia, in case of stale queued data */
1353 list_for_each_entry (req
, &ep
->queue
, queue
) {
1354 list_del_init (&req
->queue
);
1355 req
->req
.status
= -EOVERFLOW
;
1356 dev_dbg (udc_dev(dum
), "stale req = %p\n",
1359 spin_unlock (&dum
->lock
);
1360 req
->req
.complete (&ep
->ep
, &req
->req
);
1361 spin_lock (&dum
->lock
);
1362 ep
->already_seen
= 0;
1366 /* gadget driver never sees set_address or operations
1367 * on standard feature flags. some hardware doesn't
1370 ep
->last_io
= jiffies
;
1371 ep
->setup_stage
= 0;
1373 switch (setup
.bRequest
) {
1374 case USB_REQ_SET_ADDRESS
:
1375 if (setup
.bRequestType
!= Dev_Request
)
1377 dum
->address
= w_value
;
1378 maybe_set_status (urb
, 0);
1379 dev_dbg (udc_dev(dum
), "set_address = %d\n",
1383 case USB_REQ_SET_FEATURE
:
1384 if (setup
.bRequestType
== Dev_Request
) {
1387 case USB_DEVICE_REMOTE_WAKEUP
:
1389 case USB_DEVICE_B_HNP_ENABLE
:
1390 dum
->gadget
.b_hnp_enable
= 1;
1392 case USB_DEVICE_A_HNP_SUPPORT
:
1393 dum
->gadget
.a_hnp_support
= 1;
1395 case USB_DEVICE_A_ALT_HNP_SUPPORT
:
1396 dum
->gadget
.a_alt_hnp_support
1400 value
= -EOPNOTSUPP
;
1405 maybe_set_status (urb
, 0);
1408 } else if (setup
.bRequestType
== Ep_Request
) {
1410 ep2
= find_endpoint (dum
, w_index
);
1412 value
= -EOPNOTSUPP
;
1417 maybe_set_status (urb
, 0);
1420 case USB_REQ_CLEAR_FEATURE
:
1421 if (setup
.bRequestType
== Dev_Request
) {
1423 case USB_DEVICE_REMOTE_WAKEUP
:
1424 dum
->devstatus
&= ~(1 <<
1425 USB_DEVICE_REMOTE_WAKEUP
);
1427 maybe_set_status (urb
, 0);
1430 value
= -EOPNOTSUPP
;
1433 } else if (setup
.bRequestType
== Ep_Request
) {
1435 ep2
= find_endpoint (dum
, w_index
);
1437 value
= -EOPNOTSUPP
;
1442 maybe_set_status (urb
, 0);
1445 case USB_REQ_GET_STATUS
:
1446 if (setup
.bRequestType
== Dev_InRequest
1447 || setup
.bRequestType
1449 || setup
.bRequestType
1454 // device: remote wakeup, selfpowered
1455 // interface: nothing
1457 buf
= (char *)urb
->transfer_buffer
;
1458 if (urb
->transfer_buffer_length
> 0) {
1459 if (setup
.bRequestType
==
1461 ep2
= find_endpoint (dum
, w_index
);
1463 value
= -EOPNOTSUPP
;
1466 buf
[0] = ep2
->halted
;
1467 } else if (setup
.bRequestType
==
1474 if (urb
->transfer_buffer_length
> 1)
1476 urb
->actual_length
= min (2,
1477 urb
->transfer_buffer_length
);
1479 maybe_set_status (urb
, 0);
1484 /* gadget driver handles all other requests. block
1485 * until setup() returns; no reentrancy issues etc.
1488 spin_unlock (&dum
->lock
);
1489 value
= dum
->driver
->setup (&dum
->gadget
,
1491 spin_lock (&dum
->lock
);
1494 /* no delays (max 64KB data stage) */
1496 goto treat_control_like_bulk
;
1498 /* error, see below */
1502 if (value
!= -EOPNOTSUPP
)
1503 dev_dbg (udc_dev(dum
),
1506 maybe_set_status (urb
, -EPIPE
);
1507 urb
->actual_length
= 0;
1513 /* non-control requests */
1515 switch (usb_pipetype (urb
->pipe
)) {
1516 case PIPE_ISOCHRONOUS
:
1517 /* FIXME is it urb->interval since the last xfer?
1518 * use urb->iso_frame_desc[i].
1519 * complete whether or not ep has requests queued.
1520 * report random errors, to debug drivers.
1522 limit
= max (limit
, periodic_bytes (dum
, ep
));
1523 maybe_set_status (urb
, -ENOSYS
);
1526 case PIPE_INTERRUPT
:
1527 /* FIXME is it urb->interval since the last xfer?
1528 * this almost certainly polls too fast.
1530 limit
= max (limit
, periodic_bytes (dum
, ep
));
1533 // case PIPE_BULK: case PIPE_CONTROL:
1535 treat_control_like_bulk
:
1536 ep
->last_io
= jiffies
;
1537 total
= transfer (dum
, urb
, ep
, limit
);
1541 /* incomplete transfer? */
1542 if (urb
->status
== -EINPROGRESS
)
1547 list_del (&urbp
->urbp_list
);
1550 ep
->already_seen
= ep
->setup_stage
= 0;
1552 spin_unlock (&dum
->lock
);
1553 usb_hcd_giveback_urb (dummy_to_hcd(dum
), urb
);
1554 spin_lock (&dum
->lock
);
1559 if (list_empty (&dum
->urbp_list
)) {
1560 usb_put_dev (dum
->udev
);
1562 } else if (dum
->rh_state
== DUMMY_RH_RUNNING
) {
1563 /* want a 1 msec delay here */
1564 mod_timer (&dum
->timer
, jiffies
+ msecs_to_jiffies(1));
1567 spin_unlock_irqrestore (&dum
->lock
, flags
);
1570 /*-------------------------------------------------------------------------*/
1572 #define PORT_C_MASK \
1573 ((USB_PORT_STAT_C_CONNECTION \
1574 | USB_PORT_STAT_C_ENABLE \
1575 | USB_PORT_STAT_C_SUSPEND \
1576 | USB_PORT_STAT_C_OVERCURRENT \
1577 | USB_PORT_STAT_C_RESET) << 16)
1579 static int dummy_hub_status (struct usb_hcd
*hcd
, char *buf
)
1582 unsigned long flags
;
1585 dum
= hcd_to_dummy (hcd
);
1587 spin_lock_irqsave (&dum
->lock
, flags
);
1588 if (!test_bit(HCD_FLAG_HW_ACCESSIBLE
, &hcd
->flags
))
1591 if (dum
->resuming
&& time_after_eq (jiffies
, dum
->re_timeout
)) {
1592 dum
->port_status
|= (USB_PORT_STAT_C_SUSPEND
<< 16);
1593 dum
->port_status
&= ~USB_PORT_STAT_SUSPEND
;
1594 set_link_state (dum
);
1597 if ((dum
->port_status
& PORT_C_MASK
) != 0) {
1599 dev_dbg (dummy_dev(dum
), "port status 0x%08x has changes\n",
1602 if (dum
->rh_state
== DUMMY_RH_SUSPENDED
)
1603 usb_hcd_resume_root_hub (hcd
);
1606 spin_unlock_irqrestore (&dum
->lock
, flags
);
1611 hub_descriptor (struct usb_hub_descriptor
*desc
)
1613 memset (desc
, 0, sizeof *desc
);
1614 desc
->bDescriptorType
= 0x29;
1615 desc
->bDescLength
= 9;
1616 desc
->wHubCharacteristics
= (__force __u16
)
1617 (__constant_cpu_to_le16 (0x0001));
1618 desc
->bNbrPorts
= 1;
1619 desc
->bitmap
[0] = 0xff;
1620 desc
->bitmap
[1] = 0xff;
1623 static int dummy_hub_control (
1624 struct usb_hcd
*hcd
,
1633 unsigned long flags
;
1635 if (!test_bit(HCD_FLAG_HW_ACCESSIBLE
, &hcd
->flags
))
1638 dum
= hcd_to_dummy (hcd
);
1639 spin_lock_irqsave (&dum
->lock
, flags
);
1641 case ClearHubFeature
:
1643 case ClearPortFeature
:
1645 case USB_PORT_FEAT_SUSPEND
:
1646 if (dum
->port_status
& USB_PORT_STAT_SUSPEND
) {
1647 /* 20msec resume signaling */
1649 dum
->re_timeout
= jiffies
+
1650 msecs_to_jiffies(20);
1653 case USB_PORT_FEAT_POWER
:
1654 if (dum
->port_status
& USB_PORT_STAT_POWER
)
1655 dev_dbg (dummy_dev(dum
), "power-off\n");
1658 dum
->port_status
&= ~(1 << wValue
);
1659 set_link_state (dum
);
1662 case GetHubDescriptor
:
1663 hub_descriptor ((struct usb_hub_descriptor
*) buf
);
1666 *(__le32
*) buf
= __constant_cpu_to_le32 (0);
1672 /* whoever resets or resumes must GetPortStatus to
1675 if (dum
->resuming
&&
1676 time_after_eq (jiffies
, dum
->re_timeout
)) {
1677 dum
->port_status
|= (USB_PORT_STAT_C_SUSPEND
<< 16);
1678 dum
->port_status
&= ~USB_PORT_STAT_SUSPEND
;
1680 if ((dum
->port_status
& USB_PORT_STAT_RESET
) != 0 &&
1681 time_after_eq (jiffies
, dum
->re_timeout
)) {
1682 dum
->port_status
|= (USB_PORT_STAT_C_RESET
<< 16);
1683 dum
->port_status
&= ~USB_PORT_STAT_RESET
;
1685 dum
->port_status
|= USB_PORT_STAT_ENABLE
;
1686 /* give it the best speed we agree on */
1687 dum
->gadget
.speed
= dum
->driver
->speed
;
1688 dum
->gadget
.ep0
->maxpacket
= 64;
1689 switch (dum
->gadget
.speed
) {
1690 case USB_SPEED_HIGH
:
1692 USB_PORT_STAT_HIGH_SPEED
;
1695 dum
->gadget
.ep0
->maxpacket
= 8;
1697 USB_PORT_STAT_LOW_SPEED
;
1700 dum
->gadget
.speed
= USB_SPEED_FULL
;
1705 set_link_state (dum
);
1706 ((__le16
*) buf
)[0] = cpu_to_le16 (dum
->port_status
);
1707 ((__le16
*) buf
)[1] = cpu_to_le16 (dum
->port_status
>> 16);
1712 case SetPortFeature
:
1714 case USB_PORT_FEAT_SUSPEND
:
1716 dum
->port_status
|= USB_PORT_STAT_SUSPEND
;
1718 /* HNP would happen here; for now we
1719 * assume b_bus_req is always true.
1721 set_link_state (dum
);
1722 if (((1 << USB_DEVICE_B_HNP_ENABLE
)
1723 & dum
->devstatus
) != 0)
1724 dev_dbg (dummy_dev(dum
),
1728 case USB_PORT_FEAT_POWER
:
1729 dum
->port_status
|= USB_PORT_STAT_POWER
;
1730 set_link_state (dum
);
1732 case USB_PORT_FEAT_RESET
:
1733 /* if it's already enabled, disable */
1734 dum
->port_status
&= ~(USB_PORT_STAT_ENABLE
1735 | USB_PORT_STAT_LOW_SPEED
1736 | USB_PORT_STAT_HIGH_SPEED
);
1738 /* 50msec reset signaling */
1739 dum
->re_timeout
= jiffies
+ msecs_to_jiffies(50);
1742 if ((dum
->port_status
& USB_PORT_STAT_POWER
) != 0) {
1743 dum
->port_status
|= (1 << wValue
);
1744 set_link_state (dum
);
1750 dev_dbg (dummy_dev(dum
),
1751 "hub control req%04x v%04x i%04x l%d\n",
1752 typeReq
, wValue
, wIndex
, wLength
);
1754 /* "protocol stall" on error */
1757 spin_unlock_irqrestore (&dum
->lock
, flags
);
1759 if ((dum
->port_status
& PORT_C_MASK
) != 0)
1760 usb_hcd_poll_rh_status (hcd
);
1764 static int dummy_bus_suspend (struct usb_hcd
*hcd
)
1766 struct dummy
*dum
= hcd_to_dummy (hcd
);
1768 dev_dbg (&hcd
->self
.root_hub
->dev
, "%s\n", __FUNCTION__
);
1770 spin_lock_irq (&dum
->lock
);
1771 dum
->rh_state
= DUMMY_RH_SUSPENDED
;
1772 set_link_state (dum
);
1773 hcd
->state
= HC_STATE_SUSPENDED
;
1774 spin_unlock_irq (&dum
->lock
);
1778 static int dummy_bus_resume (struct usb_hcd
*hcd
)
1780 struct dummy
*dum
= hcd_to_dummy (hcd
);
1783 dev_dbg (&hcd
->self
.root_hub
->dev
, "%s\n", __FUNCTION__
);
1785 spin_lock_irq (&dum
->lock
);
1786 if (!test_bit(HCD_FLAG_HW_ACCESSIBLE
, &hcd
->flags
)) {
1787 dev_warn (&hcd
->self
.root_hub
->dev
, "HC isn't running!\n");
1790 dum
->rh_state
= DUMMY_RH_RUNNING
;
1791 set_link_state (dum
);
1792 if (!list_empty(&dum
->urbp_list
))
1793 mod_timer (&dum
->timer
, jiffies
);
1794 hcd
->state
= HC_STATE_RUNNING
;
1796 spin_unlock_irq (&dum
->lock
);
1800 /*-------------------------------------------------------------------------*/
1802 static inline ssize_t
1803 show_urb (char *buf
, size_t size
, struct urb
*urb
)
1805 int ep
= usb_pipeendpoint (urb
->pipe
);
1807 return snprintf (buf
, size
,
1808 "urb/%p %s ep%d%s%s len %d/%d\n",
1811 switch (urb
->dev
->speed
) {
1812 case USB_SPEED_LOW
: s
= "ls"; break;
1813 case USB_SPEED_FULL
: s
= "fs"; break;
1814 case USB_SPEED_HIGH
: s
= "hs"; break;
1815 default: s
= "?"; break;
1817 ep
, ep
? (usb_pipein (urb
->pipe
) ? "in" : "out") : "",
1819 switch (usb_pipetype (urb
->pipe
)) { \
1820 case PIPE_CONTROL
: s
= ""; break; \
1821 case PIPE_BULK
: s
= "-bulk"; break; \
1822 case PIPE_INTERRUPT
: s
= "-int"; break; \
1823 default: s
= "-iso"; break; \
1825 urb
->actual_length
, urb
->transfer_buffer_length
);
1829 show_urbs (struct device
*dev
, struct device_attribute
*attr
, char *buf
)
1831 struct usb_hcd
*hcd
= dev_get_drvdata (dev
);
1832 struct dummy
*dum
= hcd_to_dummy (hcd
);
1835 unsigned long flags
;
1837 spin_lock_irqsave (&dum
->lock
, flags
);
1838 list_for_each_entry (urbp
, &dum
->urbp_list
, urbp_list
) {
1841 temp
= show_urb (buf
, PAGE_SIZE
- size
, urbp
->urb
);
1845 spin_unlock_irqrestore (&dum
->lock
, flags
);
1849 static DEVICE_ATTR (urbs
, S_IRUGO
, show_urbs
, NULL
);
1851 static int dummy_start (struct usb_hcd
*hcd
)
1855 dum
= hcd_to_dummy (hcd
);
1858 * MASTER side init ... we emulate a root hub that'll only ever
1859 * talk to one device (the slave side). Also appears in sysfs,
1860 * just like more familiar pci-based HCDs.
1862 spin_lock_init (&dum
->lock
);
1863 init_timer (&dum
->timer
);
1864 dum
->timer
.function
= dummy_timer
;
1865 dum
->timer
.data
= (unsigned long) dum
;
1866 dum
->rh_state
= DUMMY_RH_RUNNING
;
1868 INIT_LIST_HEAD (&dum
->urbp_list
);
1870 /* only show a low-power port: just 8mA */
1871 hcd
->power_budget
= 8;
1872 hcd
->state
= HC_STATE_RUNNING
;
1873 hcd
->uses_new_polling
= 1;
1875 #ifdef CONFIG_USB_OTG
1876 hcd
->self
.otg_port
= 1;
1879 /* FIXME 'urbs' should be a per-device thing, maybe in usbcore */
1880 return device_create_file (dummy_dev(dum
), &dev_attr_urbs
);
1883 static void dummy_stop (struct usb_hcd
*hcd
)
1887 dum
= hcd_to_dummy (hcd
);
1889 device_remove_file (dummy_dev(dum
), &dev_attr_urbs
);
1890 usb_gadget_unregister_driver (dum
->driver
);
1891 dev_info (dummy_dev(dum
), "stopped\n");
1894 /*-------------------------------------------------------------------------*/
1896 static int dummy_h_get_frame (struct usb_hcd
*hcd
)
1898 return dummy_g_get_frame (NULL
);
1901 static const struct hc_driver dummy_hcd
= {
1902 .description
= (char *) driver_name
,
1903 .product_desc
= "Dummy host controller",
1904 .hcd_priv_size
= sizeof(struct dummy
),
1908 .start
= dummy_start
,
1911 .urb_enqueue
= dummy_urb_enqueue
,
1912 .urb_dequeue
= dummy_urb_dequeue
,
1914 .get_frame_number
= dummy_h_get_frame
,
1916 .hub_status_data
= dummy_hub_status
,
1917 .hub_control
= dummy_hub_control
,
1918 .bus_suspend
= dummy_bus_suspend
,
1919 .bus_resume
= dummy_bus_resume
,
1922 static int dummy_hcd_probe(struct platform_device
*pdev
)
1924 struct usb_hcd
*hcd
;
1927 dev_info(&pdev
->dev
, "%s, driver " DRIVER_VERSION
"\n", driver_desc
);
1929 hcd
= usb_create_hcd(&dummy_hcd
, &pdev
->dev
, pdev
->dev
.bus_id
);
1932 the_controller
= hcd_to_dummy (hcd
);
1934 retval
= usb_add_hcd(hcd
, 0, 0);
1937 the_controller
= NULL
;
1942 static int dummy_hcd_remove (struct platform_device
*pdev
)
1944 struct usb_hcd
*hcd
;
1946 hcd
= platform_get_drvdata (pdev
);
1947 usb_remove_hcd (hcd
);
1949 the_controller
= NULL
;
1953 static int dummy_hcd_suspend (struct platform_device
*pdev
, pm_message_t state
)
1955 struct usb_hcd
*hcd
;
1959 dev_dbg (&pdev
->dev
, "%s\n", __FUNCTION__
);
1961 hcd
= platform_get_drvdata (pdev
);
1962 dum
= hcd_to_dummy (hcd
);
1963 if (dum
->rh_state
== DUMMY_RH_RUNNING
) {
1964 dev_warn(&pdev
->dev
, "Root hub isn't suspended!\n");
1967 clear_bit(HCD_FLAG_HW_ACCESSIBLE
, &hcd
->flags
);
1971 static int dummy_hcd_resume (struct platform_device
*pdev
)
1973 struct usb_hcd
*hcd
;
1975 dev_dbg (&pdev
->dev
, "%s\n", __FUNCTION__
);
1977 hcd
= platform_get_drvdata (pdev
);
1978 set_bit(HCD_FLAG_HW_ACCESSIBLE
, &hcd
->flags
);
1979 usb_hcd_poll_rh_status (hcd
);
1983 static struct platform_driver dummy_hcd_driver
= {
1984 .probe
= dummy_hcd_probe
,
1985 .remove
= dummy_hcd_remove
,
1986 .suspend
= dummy_hcd_suspend
,
1987 .resume
= dummy_hcd_resume
,
1989 .name
= (char *) driver_name
,
1990 .owner
= THIS_MODULE
,
1994 /*-------------------------------------------------------------------------*/
1996 /* These don't need to do anything because the pdev structures are
1997 * statically allocated. */
1999 dummy_udc_release (struct device
*dev
) {}
2002 dummy_hcd_release (struct device
*dev
) {}
2004 static struct platform_device the_udc_pdev
= {
2005 .name
= (char *) gadget_name
,
2008 .release
= dummy_udc_release
,
2012 static struct platform_device the_hcd_pdev
= {
2013 .name
= (char *) driver_name
,
2016 .release
= dummy_hcd_release
,
2020 static int __init
init (void)
2024 if (usb_disabled ())
2027 retval
= platform_driver_register (&dummy_hcd_driver
);
2031 retval
= platform_driver_register (&dummy_udc_driver
);
2033 goto err_register_udc_driver
;
2035 retval
= platform_device_register (&the_hcd_pdev
);
2037 goto err_register_hcd
;
2039 retval
= platform_device_register (&the_udc_pdev
);
2041 goto err_register_udc
;
2045 platform_device_unregister (&the_hcd_pdev
);
2047 platform_driver_unregister (&dummy_udc_driver
);
2048 err_register_udc_driver
:
2049 platform_driver_unregister (&dummy_hcd_driver
);
2054 static void __exit
cleanup (void)
2056 platform_device_unregister (&the_udc_pdev
);
2057 platform_device_unregister (&the_hcd_pdev
);
2058 platform_driver_unregister (&dummy_udc_driver
);
2059 platform_driver_unregister (&dummy_hcd_driver
);
2061 module_exit (cleanup
);