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 static const char driver_name
[] = "dummy_hcd";
65 static const char driver_desc
[] = "USB Host+Gadget Emulator";
67 static const char gadget_name
[] = "dummy_udc";
69 MODULE_DESCRIPTION (DRIVER_DESC
);
70 MODULE_AUTHOR ("David Brownell");
71 MODULE_LICENSE ("GPL");
73 /*-------------------------------------------------------------------------*/
75 /* gadget side driver data structres */
77 struct list_head queue
;
78 unsigned long last_io
; /* jiffies timestamp */
79 struct usb_gadget
*gadget
;
80 const struct usb_endpoint_descriptor
*desc
;
83 unsigned already_seen
: 1;
84 unsigned setup_stage
: 1;
87 struct dummy_request
{
88 struct list_head queue
; /* ep's requests */
89 struct usb_request req
;
92 static inline struct dummy_ep
*usb_ep_to_dummy_ep (struct usb_ep
*_ep
)
94 return container_of (_ep
, struct dummy_ep
, ep
);
97 static inline struct dummy_request
*usb_request_to_dummy_request
98 (struct usb_request
*_req
)
100 return container_of (_req
, struct dummy_request
, req
);
103 /*-------------------------------------------------------------------------*/
106 * Every device has ep0 for control requests, plus up to 30 more endpoints,
107 * in one of two types:
109 * - Configurable: direction (in/out), type (bulk, iso, etc), and endpoint
110 * number can be changed. Names like "ep-a" are used for this type.
112 * - Fixed Function: in other cases. some characteristics may be mutable;
113 * that'd be hardware-specific. Names like "ep12out-bulk" are used.
115 * Gadget drivers are responsible for not setting up conflicting endpoint
116 * configurations, illegal or unsupported packet lengths, and so on.
119 static const char ep0name
[] = "ep0";
121 static const char *const ep_name
[] = {
122 ep0name
, /* everyone has ep0 */
124 /* act like a net2280: high speed, six configurable endpoints */
125 "ep-a", "ep-b", "ep-c", "ep-d", "ep-e", "ep-f",
127 /* or like pxa250: fifteen fixed function endpoints */
128 "ep1in-bulk", "ep2out-bulk", "ep3in-iso", "ep4out-iso", "ep5in-int",
129 "ep6in-bulk", "ep7out-bulk", "ep8in-iso", "ep9out-iso", "ep10in-int",
130 "ep11in-bulk", "ep12out-bulk", "ep13in-iso", "ep14out-iso",
133 /* or like sa1100: two fixed function endpoints */
134 "ep1out-bulk", "ep2in-bulk",
136 #define DUMMY_ENDPOINTS ARRAY_SIZE(ep_name)
138 /*-------------------------------------------------------------------------*/
144 struct list_head urbp_list
;
148 enum dummy_rh_state
{
158 * SLAVE/GADGET side support
160 struct dummy_ep ep
[DUMMY_ENDPOINTS
];
162 struct usb_gadget gadget
;
163 struct usb_gadget_driver
*driver
;
164 struct dummy_request fifo_req
;
165 u8 fifo_buf
[FIFO_SIZE
];
167 unsigned udc_suspended
:1;
170 unsigned old_active
:1;
173 * MASTER/HOST side support
175 enum dummy_rh_state rh_state
;
176 struct timer_list timer
;
180 unsigned long re_timeout
;
182 struct usb_device
*udev
;
183 struct list_head urbp_list
;
186 static inline struct dummy
*hcd_to_dummy (struct usb_hcd
*hcd
)
188 return (struct dummy
*) (hcd
->hcd_priv
);
191 static inline struct usb_hcd
*dummy_to_hcd (struct dummy
*dum
)
193 return container_of((void *) dum
, struct usb_hcd
, hcd_priv
);
196 static inline struct device
*dummy_dev (struct dummy
*dum
)
198 return dummy_to_hcd(dum
)->self
.controller
;
201 static inline struct device
*udc_dev (struct dummy
*dum
)
203 return dum
->gadget
.dev
.parent
;
206 static inline struct dummy
*ep_to_dummy (struct dummy_ep
*ep
)
208 return container_of (ep
->gadget
, struct dummy
, gadget
);
211 static inline struct dummy
*gadget_to_dummy (struct usb_gadget
*gadget
)
213 return container_of (gadget
, struct dummy
, gadget
);
216 static inline struct dummy
*gadget_dev_to_dummy (struct device
*dev
)
218 return container_of (dev
, struct dummy
, gadget
.dev
);
221 static struct dummy
*the_controller
;
223 /*-------------------------------------------------------------------------*/
225 /* SLAVE/GADGET SIDE UTILITY ROUTINES */
227 /* called with spinlock held */
228 static void nuke (struct dummy
*dum
, struct dummy_ep
*ep
)
230 while (!list_empty (&ep
->queue
)) {
231 struct dummy_request
*req
;
233 req
= list_entry (ep
->queue
.next
, struct dummy_request
, queue
);
234 list_del_init (&req
->queue
);
235 req
->req
.status
= -ESHUTDOWN
;
237 spin_unlock (&dum
->lock
);
238 req
->req
.complete (&ep
->ep
, &req
->req
);
239 spin_lock (&dum
->lock
);
243 /* caller must hold lock */
245 stop_activity (struct dummy
*dum
)
249 /* prevent any more requests */
252 /* The timer is left running so that outstanding URBs can fail */
254 /* nuke any pending requests first, so driver i/o is quiesced */
255 list_for_each_entry (ep
, &dum
->gadget
.ep_list
, ep
.ep_list
)
258 /* driver now does any non-usb quiescing necessary */
261 /* caller must hold lock */
263 set_link_state (struct dummy
*dum
)
266 if ((dum
->port_status
& USB_PORT_STAT_POWER
) == 0)
267 dum
->port_status
= 0;
269 /* UDC suspend must cause a disconnect */
270 else if (!dum
->pullup
|| dum
->udc_suspended
) {
271 dum
->port_status
&= ~(USB_PORT_STAT_CONNECTION
|
272 USB_PORT_STAT_ENABLE
|
273 USB_PORT_STAT_LOW_SPEED
|
274 USB_PORT_STAT_HIGH_SPEED
|
275 USB_PORT_STAT_SUSPEND
);
276 if ((dum
->old_status
& USB_PORT_STAT_CONNECTION
) != 0)
277 dum
->port_status
|= (USB_PORT_STAT_C_CONNECTION
<< 16);
279 dum
->port_status
|= USB_PORT_STAT_CONNECTION
;
280 if ((dum
->old_status
& USB_PORT_STAT_CONNECTION
) == 0)
281 dum
->port_status
|= (USB_PORT_STAT_C_CONNECTION
<< 16);
282 if ((dum
->port_status
& USB_PORT_STAT_ENABLE
) == 0)
283 dum
->port_status
&= ~USB_PORT_STAT_SUSPEND
;
284 else if ((dum
->port_status
& USB_PORT_STAT_SUSPEND
) == 0 &&
285 dum
->rh_state
!= DUMMY_RH_SUSPENDED
)
289 if ((dum
->port_status
& USB_PORT_STAT_ENABLE
) == 0 || dum
->active
)
292 if ((dum
->port_status
& USB_PORT_STAT_CONNECTION
) == 0 ||
293 (dum
->port_status
& USB_PORT_STAT_RESET
) != 0) {
294 if ((dum
->old_status
& USB_PORT_STAT_CONNECTION
) != 0 &&
295 (dum
->old_status
& USB_PORT_STAT_RESET
) == 0 &&
298 spin_unlock (&dum
->lock
);
299 dum
->driver
->disconnect (&dum
->gadget
);
300 spin_lock (&dum
->lock
);
302 } else if (dum
->active
!= dum
->old_active
) {
303 if (dum
->old_active
&& dum
->driver
->suspend
) {
304 spin_unlock (&dum
->lock
);
305 dum
->driver
->suspend (&dum
->gadget
);
306 spin_lock (&dum
->lock
);
307 } else if (!dum
->old_active
&& dum
->driver
->resume
) {
308 spin_unlock (&dum
->lock
);
309 dum
->driver
->resume (&dum
->gadget
);
310 spin_lock (&dum
->lock
);
314 dum
->old_status
= dum
->port_status
;
315 dum
->old_active
= dum
->active
;
318 /*-------------------------------------------------------------------------*/
320 /* SLAVE/GADGET SIDE DRIVER
322 * This only tracks gadget state. All the work is done when the host
323 * side tries some (emulated) i/o operation. Real device controller
324 * drivers would do real i/o using dma, fifos, irqs, timers, etc.
327 #define is_enabled(dum) \
328 (dum->port_status & USB_PORT_STAT_ENABLE)
331 dummy_enable (struct usb_ep
*_ep
, const struct usb_endpoint_descriptor
*desc
)
338 ep
= usb_ep_to_dummy_ep (_ep
);
339 if (!_ep
|| !desc
|| ep
->desc
|| _ep
->name
== ep0name
340 || desc
->bDescriptorType
!= USB_DT_ENDPOINT
)
342 dum
= ep_to_dummy (ep
);
343 if (!dum
->driver
|| !is_enabled (dum
))
345 max
= le16_to_cpu(desc
->wMaxPacketSize
) & 0x3ff;
347 /* drivers must not request bad settings, since lower levels
348 * (hardware or its drivers) may not check. some endpoints
349 * can't do iso, many have maxpacket limitations, etc.
351 * since this "hardware" driver is here to help debugging, we
352 * have some extra sanity checks. (there could be more though,
353 * especially for "ep9out" style fixed function ones.)
356 switch (desc
->bmAttributes
& 0x03) {
357 case USB_ENDPOINT_XFER_BULK
:
358 if (strstr (ep
->ep
.name
, "-iso")
359 || strstr (ep
->ep
.name
, "-int")) {
362 switch (dum
->gadget
.speed
) {
366 /* conserve return statements */
369 case 8: case 16: case 32: case 64:
370 /* we'll fake any legal size */
378 case USB_ENDPOINT_XFER_INT
:
379 if (strstr (ep
->ep
.name
, "-iso")) /* bulk is ok */
381 /* real hardware might not handle all packet sizes */
382 switch (dum
->gadget
.speed
) {
386 /* save a return statement */
390 /* save a return statement */
397 case USB_ENDPOINT_XFER_ISOC
:
398 if (strstr (ep
->ep
.name
, "-bulk")
399 || strstr (ep
->ep
.name
, "-int"))
401 /* real hardware might not handle all packet sizes */
402 switch (dum
->gadget
.speed
) {
406 /* save a return statement */
410 /* save a return statement */
416 /* few chips support control except on ep0 */
420 _ep
->maxpacket
= max
;
423 dev_dbg (udc_dev(dum
), "enabled %s (ep%d%s-%s) maxpacket %d\n",
425 desc
->bEndpointAddress
& 0x0f,
426 (desc
->bEndpointAddress
& USB_DIR_IN
) ? "in" : "out",
428 switch (desc
->bmAttributes
& 0x03) {
429 case USB_ENDPOINT_XFER_BULK
: val
= "bulk"; break;
430 case USB_ENDPOINT_XFER_ISOC
: val
= "iso"; break;
431 case USB_ENDPOINT_XFER_INT
: val
= "intr"; break;
432 default: val
= "ctrl"; break;
436 /* at this point real hardware should be NAKing transfers
437 * to that endpoint, until a buffer is queued to it.
444 static int dummy_disable (struct usb_ep
*_ep
)
451 ep
= usb_ep_to_dummy_ep (_ep
);
452 if (!_ep
|| !ep
->desc
|| _ep
->name
== ep0name
)
454 dum
= ep_to_dummy (ep
);
456 spin_lock_irqsave (&dum
->lock
, flags
);
460 spin_unlock_irqrestore (&dum
->lock
, flags
);
462 dev_dbg (udc_dev(dum
), "disabled %s\n", _ep
->name
);
466 static struct usb_request
*
467 dummy_alloc_request (struct usb_ep
*_ep
, gfp_t mem_flags
)
470 struct dummy_request
*req
;
474 ep
= usb_ep_to_dummy_ep (_ep
);
476 req
= kzalloc(sizeof(*req
), mem_flags
);
479 INIT_LIST_HEAD (&req
->queue
);
484 dummy_free_request (struct usb_ep
*_ep
, struct usb_request
*_req
)
487 struct dummy_request
*req
;
489 ep
= usb_ep_to_dummy_ep (_ep
);
490 if (!ep
|| !_req
|| (!ep
->desc
&& _ep
->name
!= ep0name
))
493 req
= usb_request_to_dummy_request (_req
);
494 WARN_ON (!list_empty (&req
->queue
));
499 fifo_complete (struct usb_ep
*ep
, struct usb_request
*req
)
504 dummy_queue (struct usb_ep
*_ep
, struct usb_request
*_req
,
508 struct dummy_request
*req
;
512 req
= usb_request_to_dummy_request (_req
);
513 if (!_req
|| !list_empty (&req
->queue
) || !_req
->complete
)
516 ep
= usb_ep_to_dummy_ep (_ep
);
517 if (!_ep
|| (!ep
->desc
&& _ep
->name
!= ep0name
))
520 dum
= ep_to_dummy (ep
);
521 if (!dum
->driver
|| !is_enabled (dum
))
525 dev_dbg (udc_dev(dum
), "ep %p queue req %p to %s, len %d buf %p\n",
526 ep
, _req
, _ep
->name
, _req
->length
, _req
->buf
);
529 _req
->status
= -EINPROGRESS
;
531 spin_lock_irqsave (&dum
->lock
, flags
);
533 /* implement an emulated single-request FIFO */
534 if (ep
->desc
&& (ep
->desc
->bEndpointAddress
& USB_DIR_IN
) &&
535 list_empty (&dum
->fifo_req
.queue
) &&
536 list_empty (&ep
->queue
) &&
537 _req
->length
<= FIFO_SIZE
) {
538 req
= &dum
->fifo_req
;
540 req
->req
.buf
= dum
->fifo_buf
;
541 memcpy (dum
->fifo_buf
, _req
->buf
, _req
->length
);
542 req
->req
.context
= dum
;
543 req
->req
.complete
= fifo_complete
;
545 spin_unlock (&dum
->lock
);
546 _req
->actual
= _req
->length
;
548 _req
->complete (_ep
, _req
);
549 spin_lock (&dum
->lock
);
551 list_add_tail (&req
->queue
, &ep
->queue
);
552 spin_unlock_irqrestore (&dum
->lock
, flags
);
554 /* real hardware would likely enable transfers here, in case
555 * it'd been left NAKing.
560 static int dummy_dequeue (struct usb_ep
*_ep
, struct usb_request
*_req
)
564 int retval
= -EINVAL
;
566 struct dummy_request
*req
= NULL
;
570 ep
= usb_ep_to_dummy_ep (_ep
);
571 dum
= ep_to_dummy (ep
);
576 local_irq_save (flags
);
577 spin_lock (&dum
->lock
);
578 list_for_each_entry (req
, &ep
->queue
, queue
) {
579 if (&req
->req
== _req
) {
580 list_del_init (&req
->queue
);
581 _req
->status
= -ECONNRESET
;
586 spin_unlock (&dum
->lock
);
589 dev_dbg (udc_dev(dum
),
590 "dequeued req %p from %s, len %d buf %p\n",
591 req
, _ep
->name
, _req
->length
, _req
->buf
);
592 _req
->complete (_ep
, _req
);
594 local_irq_restore (flags
);
599 dummy_set_halt (struct usb_ep
*_ep
, int value
)
606 ep
= usb_ep_to_dummy_ep (_ep
);
607 dum
= ep_to_dummy (ep
);
612 else if (ep
->desc
&& (ep
->desc
->bEndpointAddress
& USB_DIR_IN
) &&
613 !list_empty (&ep
->queue
))
617 /* FIXME clear emulated data toggle too */
621 static const struct usb_ep_ops dummy_ep_ops
= {
622 .enable
= dummy_enable
,
623 .disable
= dummy_disable
,
625 .alloc_request
= dummy_alloc_request
,
626 .free_request
= dummy_free_request
,
628 .queue
= dummy_queue
,
629 .dequeue
= dummy_dequeue
,
631 .set_halt
= dummy_set_halt
,
634 /*-------------------------------------------------------------------------*/
636 /* there are both host and device side versions of this call ... */
637 static int dummy_g_get_frame (struct usb_gadget
*_gadget
)
641 do_gettimeofday (&tv
);
642 return tv
.tv_usec
/ 1000;
645 static int dummy_wakeup (struct usb_gadget
*_gadget
)
649 dum
= gadget_to_dummy (_gadget
);
650 if (!(dum
->devstatus
& ( (1 << USB_DEVICE_B_HNP_ENABLE
)
651 | (1 << USB_DEVICE_REMOTE_WAKEUP
))))
653 if ((dum
->port_status
& USB_PORT_STAT_CONNECTION
) == 0)
655 if ((dum
->port_status
& USB_PORT_STAT_SUSPEND
) == 0 &&
656 dum
->rh_state
!= DUMMY_RH_SUSPENDED
)
659 /* FIXME: What if the root hub is suspended but the port isn't? */
661 /* hub notices our request, issues downstream resume, etc */
663 dum
->re_timeout
= jiffies
+ msecs_to_jiffies(20);
664 mod_timer (&dummy_to_hcd (dum
)->rh_timer
, dum
->re_timeout
);
668 static int dummy_set_selfpowered (struct usb_gadget
*_gadget
, int value
)
672 dum
= gadget_to_dummy (_gadget
);
674 dum
->devstatus
|= (1 << USB_DEVICE_SELF_POWERED
);
676 dum
->devstatus
&= ~(1 << USB_DEVICE_SELF_POWERED
);
680 static int dummy_pullup (struct usb_gadget
*_gadget
, int value
)
685 dum
= gadget_to_dummy (_gadget
);
686 spin_lock_irqsave (&dum
->lock
, flags
);
687 dum
->pullup
= (value
!= 0);
688 set_link_state (dum
);
689 spin_unlock_irqrestore (&dum
->lock
, flags
);
691 usb_hcd_poll_rh_status (dummy_to_hcd (dum
));
695 static const struct usb_gadget_ops dummy_ops
= {
696 .get_frame
= dummy_g_get_frame
,
697 .wakeup
= dummy_wakeup
,
698 .set_selfpowered
= dummy_set_selfpowered
,
699 .pullup
= dummy_pullup
,
702 /*-------------------------------------------------------------------------*/
704 /* "function" sysfs attribute */
706 show_function (struct device
*dev
, struct device_attribute
*attr
, char *buf
)
708 struct dummy
*dum
= gadget_dev_to_dummy (dev
);
710 if (!dum
->driver
|| !dum
->driver
->function
)
712 return scnprintf (buf
, PAGE_SIZE
, "%s\n", dum
->driver
->function
);
714 static DEVICE_ATTR (function
, S_IRUGO
, show_function
, NULL
);
716 /*-------------------------------------------------------------------------*/
719 * Driver registration/unregistration.
721 * This is basically hardware-specific; there's usually only one real USB
722 * device (not host) controller since that's how USB devices are intended
723 * to work. So most implementations of these api calls will rely on the
724 * fact that only one driver will ever bind to the hardware. But curious
725 * hardware can be built with discrete components, so the gadget API doesn't
726 * require that assumption.
728 * For this emulator, it might be convenient to create a usb slave device
729 * for each driver that registers: just add to a big root hub.
733 usb_gadget_register_driver (struct usb_gadget_driver
*driver
)
735 struct dummy
*dum
= the_controller
;
742 if (!driver
->bind
|| !driver
->setup
743 || driver
->speed
== USB_SPEED_UNKNOWN
)
747 * SLAVE side init ... the layer above hardware, which
748 * can't enumerate without help from the driver we're binding.
753 INIT_LIST_HEAD (&dum
->gadget
.ep_list
);
754 for (i
= 0; i
< DUMMY_ENDPOINTS
; i
++) {
755 struct dummy_ep
*ep
= &dum
->ep
[i
];
759 ep
->ep
.name
= ep_name
[i
];
760 ep
->ep
.ops
= &dummy_ep_ops
;
761 list_add_tail (&ep
->ep
.ep_list
, &dum
->gadget
.ep_list
);
762 ep
->halted
= ep
->already_seen
= ep
->setup_stage
= 0;
763 ep
->ep
.maxpacket
= ~0;
764 ep
->last_io
= jiffies
;
765 ep
->gadget
= &dum
->gadget
;
767 INIT_LIST_HEAD (&ep
->queue
);
770 dum
->gadget
.ep0
= &dum
->ep
[0].ep
;
771 dum
->ep
[0].ep
.maxpacket
= 64;
772 list_del_init (&dum
->ep
[0].ep
.ep_list
);
773 INIT_LIST_HEAD(&dum
->fifo_req
.queue
);
775 dum
->driver
= driver
;
776 dum
->gadget
.dev
.driver
= &driver
->driver
;
777 dev_dbg (udc_dev(dum
), "binding gadget driver '%s'\n",
778 driver
->driver
.name
);
779 if ((retval
= driver
->bind (&dum
->gadget
)) != 0)
780 goto err_bind_gadget
;
782 driver
->driver
.bus
= dum
->gadget
.dev
.parent
->bus
;
783 if ((retval
= driver_register (&driver
->driver
)) != 0)
785 if ((retval
= device_bind_driver (&dum
->gadget
.dev
)) != 0)
786 goto err_bind_driver
;
788 /* khubd will enumerate this in a while */
789 spin_lock_irq (&dum
->lock
);
791 set_link_state (dum
);
792 spin_unlock_irq (&dum
->lock
);
794 usb_hcd_poll_rh_status (dummy_to_hcd (dum
));
798 driver_unregister (&driver
->driver
);
801 driver
->unbind (&dum
->gadget
);
802 spin_lock_irq (&dum
->lock
);
804 set_link_state (dum
);
805 spin_unlock_irq (&dum
->lock
);
808 dum
->gadget
.dev
.driver
= NULL
;
811 EXPORT_SYMBOL (usb_gadget_register_driver
);
814 usb_gadget_unregister_driver (struct usb_gadget_driver
*driver
)
816 struct dummy
*dum
= the_controller
;
821 if (!driver
|| driver
!= dum
->driver
|| !driver
->unbind
)
824 dev_dbg (udc_dev(dum
), "unregister gadget driver '%s'\n",
825 driver
->driver
.name
);
827 spin_lock_irqsave (&dum
->lock
, flags
);
829 set_link_state (dum
);
830 spin_unlock_irqrestore (&dum
->lock
, flags
);
832 driver
->unbind (&dum
->gadget
);
835 device_release_driver (&dum
->gadget
.dev
);
836 driver_unregister (&driver
->driver
);
838 spin_lock_irqsave (&dum
->lock
, flags
);
840 set_link_state (dum
);
841 spin_unlock_irqrestore (&dum
->lock
, flags
);
843 usb_hcd_poll_rh_status (dummy_to_hcd (dum
));
846 EXPORT_SYMBOL (usb_gadget_unregister_driver
);
850 /* just declare this in any driver that really need it */
851 extern int net2280_set_fifo_mode (struct usb_gadget
*gadget
, int mode
);
853 int net2280_set_fifo_mode (struct usb_gadget
*gadget
, int mode
)
857 EXPORT_SYMBOL (net2280_set_fifo_mode
);
860 /* The gadget structure is stored inside the hcd structure and will be
861 * released along with it. */
863 dummy_gadget_release (struct device
*dev
)
865 struct dummy
*dum
= gadget_dev_to_dummy (dev
);
867 usb_put_hcd (dummy_to_hcd (dum
));
870 static int dummy_udc_probe (struct platform_device
*pdev
)
872 struct dummy
*dum
= the_controller
;
875 dum
->gadget
.name
= gadget_name
;
876 dum
->gadget
.ops
= &dummy_ops
;
877 dum
->gadget
.is_dualspeed
= 1;
879 /* maybe claim OTG support, though we won't complete HNP */
880 dum
->gadget
.is_otg
= (dummy_to_hcd(dum
)->self
.otg_port
!= 0);
882 strcpy (dum
->gadget
.dev
.bus_id
, "gadget");
883 dum
->gadget
.dev
.parent
= &pdev
->dev
;
884 dum
->gadget
.dev
.release
= dummy_gadget_release
;
885 rc
= device_register (&dum
->gadget
.dev
);
889 usb_get_hcd (dummy_to_hcd (dum
));
891 platform_set_drvdata (pdev
, dum
);
892 rc
= device_create_file (&dum
->gadget
.dev
, &dev_attr_function
);
894 device_unregister (&dum
->gadget
.dev
);
898 static int dummy_udc_remove (struct platform_device
*pdev
)
900 struct dummy
*dum
= platform_get_drvdata (pdev
);
902 platform_set_drvdata (pdev
, NULL
);
903 device_remove_file (&dum
->gadget
.dev
, &dev_attr_function
);
904 device_unregister (&dum
->gadget
.dev
);
908 static int dummy_udc_suspend (struct platform_device
*pdev
, pm_message_t state
)
910 struct dummy
*dum
= platform_get_drvdata(pdev
);
912 dev_dbg (&pdev
->dev
, "%s\n", __FUNCTION__
);
913 spin_lock_irq (&dum
->lock
);
914 dum
->udc_suspended
= 1;
915 set_link_state (dum
);
916 spin_unlock_irq (&dum
->lock
);
918 pdev
->dev
.power
.power_state
= state
;
919 usb_hcd_poll_rh_status (dummy_to_hcd (dum
));
923 static int dummy_udc_resume (struct platform_device
*pdev
)
925 struct dummy
*dum
= platform_get_drvdata(pdev
);
927 dev_dbg (&pdev
->dev
, "%s\n", __FUNCTION__
);
928 spin_lock_irq (&dum
->lock
);
929 dum
->udc_suspended
= 0;
930 set_link_state (dum
);
931 spin_unlock_irq (&dum
->lock
);
933 pdev
->dev
.power
.power_state
= PMSG_ON
;
934 usb_hcd_poll_rh_status (dummy_to_hcd (dum
));
938 static struct platform_driver dummy_udc_driver
= {
939 .probe
= dummy_udc_probe
,
940 .remove
= dummy_udc_remove
,
941 .suspend
= dummy_udc_suspend
,
942 .resume
= dummy_udc_resume
,
944 .name
= (char *) gadget_name
,
945 .owner
= THIS_MODULE
,
949 /*-------------------------------------------------------------------------*/
951 /* MASTER/HOST SIDE DRIVER
953 * this uses the hcd framework to hook up to host side drivers.
954 * its root hub will only have one device, otherwise it acts like
955 * a normal host controller.
957 * when urbs are queued, they're just stuck on a list that we
958 * scan in a timer callback. that callback connects writes from
959 * the host with reads from the device, and so on, based on the
963 static int dummy_urb_enqueue (
965 struct usb_host_endpoint
*ep
,
973 if (!urb
->transfer_buffer
&& urb
->transfer_buffer_length
)
976 urbp
= kmalloc (sizeof *urbp
, mem_flags
);
981 dum
= hcd_to_dummy (hcd
);
982 spin_lock_irqsave (&dum
->lock
, flags
);
985 dum
->udev
= urb
->dev
;
986 usb_get_dev (dum
->udev
);
987 } else if (unlikely (dum
->udev
!= urb
->dev
))
988 dev_err (dummy_dev(dum
), "usb_device address has changed!\n");
990 list_add_tail (&urbp
->urbp_list
, &dum
->urbp_list
);
992 if (usb_pipetype (urb
->pipe
) == PIPE_CONTROL
)
993 urb
->error_count
= 1; /* mark as a new urb */
995 /* kick the scheduler, it'll do the rest */
996 if (!timer_pending (&dum
->timer
))
997 mod_timer (&dum
->timer
, jiffies
+ 1);
999 spin_unlock_irqrestore (&dum
->lock
, flags
);
1003 static int dummy_urb_dequeue (struct usb_hcd
*hcd
, struct urb
*urb
)
1006 unsigned long flags
;
1008 /* giveback happens automatically in timer callback,
1009 * so make sure the callback happens */
1010 dum
= hcd_to_dummy (hcd
);
1011 spin_lock_irqsave (&dum
->lock
, flags
);
1012 if (dum
->rh_state
!= DUMMY_RH_RUNNING
&& !list_empty(&dum
->urbp_list
))
1013 mod_timer (&dum
->timer
, jiffies
);
1014 spin_unlock_irqrestore (&dum
->lock
, flags
);
1018 static void maybe_set_status (struct urb
*urb
, int status
)
1020 spin_lock (&urb
->lock
);
1021 if (urb
->status
== -EINPROGRESS
)
1022 urb
->status
= status
;
1023 spin_unlock (&urb
->lock
);
1026 /* transfer up to a frame's worth; caller must own lock */
1028 transfer (struct dummy
*dum
, struct urb
*urb
, struct dummy_ep
*ep
, int limit
)
1030 struct dummy_request
*req
;
1033 /* if there's no request queued, the device is NAKing; return */
1034 list_for_each_entry (req
, &ep
->queue
, queue
) {
1035 unsigned host_len
, dev_len
, len
;
1036 int is_short
, to_host
;
1039 /* 1..N packets of ep->ep.maxpacket each ... the last one
1040 * may be short (including zero length).
1042 * writer can send a zlp explicitly (length 0) or implicitly
1043 * (length mod maxpacket zero, and 'zero' flag); they always
1046 host_len
= urb
->transfer_buffer_length
- urb
->actual_length
;
1047 dev_len
= req
->req
.length
- req
->req
.actual
;
1048 len
= min (host_len
, dev_len
);
1050 /* FIXME update emulated data toggle too */
1052 to_host
= usb_pipein (urb
->pipe
);
1053 if (unlikely (len
== 0))
1058 /* not enough bandwidth left? */
1059 if (limit
< ep
->ep
.maxpacket
&& limit
< len
)
1061 len
= min (len
, (unsigned) limit
);
1065 /* use an extra pass for the final short packet */
1066 if (len
> ep
->ep
.maxpacket
) {
1068 len
-= (len
% ep
->ep
.maxpacket
);
1070 is_short
= (len
% ep
->ep
.maxpacket
) != 0;
1072 /* else transfer packet(s) */
1073 ubuf
= urb
->transfer_buffer
+ urb
->actual_length
;
1074 rbuf
= req
->req
.buf
+ req
->req
.actual
;
1076 memcpy (ubuf
, rbuf
, len
);
1078 memcpy (rbuf
, ubuf
, len
);
1079 ep
->last_io
= jiffies
;
1082 urb
->actual_length
+= len
;
1083 req
->req
.actual
+= len
;
1086 /* short packets terminate, maybe with overflow/underflow.
1087 * it's only really an error to write too much.
1089 * partially filling a buffer optionally blocks queue advances
1090 * (so completion handlers can clean up the queue) but we don't
1091 * need to emulate such data-in-flight. so we only show part
1092 * of the URB_SHORT_NOT_OK effect: completion status.
1095 if (host_len
== dev_len
) {
1096 req
->req
.status
= 0;
1097 maybe_set_status (urb
, 0);
1098 } else if (to_host
) {
1099 req
->req
.status
= 0;
1100 if (dev_len
> host_len
)
1101 maybe_set_status (urb
, -EOVERFLOW
);
1103 maybe_set_status (urb
,
1104 (urb
->transfer_flags
1107 } else if (!to_host
) {
1108 maybe_set_status (urb
, 0);
1109 if (host_len
> dev_len
)
1110 req
->req
.status
= -EOVERFLOW
;
1112 req
->req
.status
= 0;
1115 /* many requests terminate without a short packet */
1117 if (req
->req
.length
== req
->req
.actual
1119 req
->req
.status
= 0;
1120 if (urb
->transfer_buffer_length
== urb
->actual_length
1121 && !(urb
->transfer_flags
1122 & URB_ZERO_PACKET
)) {
1123 maybe_set_status (urb
, 0);
1127 /* device side completion --> continuable */
1128 if (req
->req
.status
!= -EINPROGRESS
) {
1129 list_del_init (&req
->queue
);
1131 spin_unlock (&dum
->lock
);
1132 req
->req
.complete (&ep
->ep
, &req
->req
);
1133 spin_lock (&dum
->lock
);
1135 /* requests might have been unlinked... */
1139 /* host side completion --> terminate */
1140 if (urb
->status
!= -EINPROGRESS
)
1143 /* rescan to continue with any other queued i/o */
1150 static int periodic_bytes (struct dummy
*dum
, struct dummy_ep
*ep
)
1152 int limit
= ep
->ep
.maxpacket
;
1154 if (dum
->gadget
.speed
== USB_SPEED_HIGH
) {
1157 /* high bandwidth mode */
1158 tmp
= le16_to_cpu(ep
->desc
->wMaxPacketSize
);
1159 tmp
= (tmp
>> 11) & 0x03;
1160 tmp
*= 8 /* applies to entire frame */;
1161 limit
+= limit
* tmp
;
1166 #define is_active(dum) ((dum->port_status & \
1167 (USB_PORT_STAT_CONNECTION | USB_PORT_STAT_ENABLE | \
1168 USB_PORT_STAT_SUSPEND)) \
1169 == (USB_PORT_STAT_CONNECTION | USB_PORT_STAT_ENABLE))
1171 static struct dummy_ep
*find_endpoint (struct dummy
*dum
, u8 address
)
1175 if (!is_active (dum
))
1177 if ((address
& ~USB_DIR_IN
) == 0)
1178 return &dum
->ep
[0];
1179 for (i
= 1; i
< DUMMY_ENDPOINTS
; i
++) {
1180 struct dummy_ep
*ep
= &dum
->ep
[i
];
1184 if (ep
->desc
->bEndpointAddress
== address
)
1192 #define Dev_Request (USB_TYPE_STANDARD | USB_RECIP_DEVICE)
1193 #define Dev_InRequest (Dev_Request | USB_DIR_IN)
1194 #define Intf_Request (USB_TYPE_STANDARD | USB_RECIP_INTERFACE)
1195 #define Intf_InRequest (Intf_Request | USB_DIR_IN)
1196 #define Ep_Request (USB_TYPE_STANDARD | USB_RECIP_ENDPOINT)
1197 #define Ep_InRequest (Ep_Request | USB_DIR_IN)
1199 /* drive both sides of the transfers; looks like irq handlers to
1200 * both drivers except the callbacks aren't in_irq().
1202 static void dummy_timer (unsigned long _dum
)
1204 struct dummy
*dum
= (struct dummy
*) _dum
;
1205 struct urbp
*urbp
, *tmp
;
1206 unsigned long flags
;
1210 /* simplistic model for one frame's bandwidth */
1211 switch (dum
->gadget
.speed
) {
1213 total
= 8/*bytes*/ * 12/*packets*/;
1215 case USB_SPEED_FULL
:
1216 total
= 64/*bytes*/ * 19/*packets*/;
1218 case USB_SPEED_HIGH
:
1219 total
= 512/*bytes*/ * 13/*packets*/ * 8/*uframes*/;
1222 dev_err (dummy_dev(dum
), "bogus device speed\n");
1226 /* FIXME if HZ != 1000 this will probably misbehave ... */
1228 /* look at each urb queued by the host side driver */
1229 spin_lock_irqsave (&dum
->lock
, flags
);
1232 dev_err (dummy_dev(dum
),
1233 "timer fired with no URBs pending?\n");
1234 spin_unlock_irqrestore (&dum
->lock
, flags
);
1238 for (i
= 0; i
< DUMMY_ENDPOINTS
; i
++) {
1241 dum
->ep
[i
].already_seen
= 0;
1245 list_for_each_entry_safe (urbp
, tmp
, &dum
->urbp_list
, urbp_list
) {
1247 struct dummy_request
*req
;
1249 struct dummy_ep
*ep
= NULL
;
1253 if (urb
->status
!= -EINPROGRESS
) {
1254 /* likely it was just unlinked */
1256 } else if (dum
->rh_state
!= DUMMY_RH_RUNNING
)
1258 type
= usb_pipetype (urb
->pipe
);
1260 /* used up this frame's non-periodic bandwidth?
1261 * FIXME there's infinite bandwidth for control and
1262 * periodic transfers ... unrealistic.
1264 if (total
<= 0 && type
== PIPE_BULK
)
1267 /* find the gadget's ep for this request (if configured) */
1268 address
= usb_pipeendpoint (urb
->pipe
);
1269 if (usb_pipein (urb
->pipe
))
1270 address
|= USB_DIR_IN
;
1271 ep
= find_endpoint(dum
, address
);
1273 /* set_configuration() disagreement */
1274 dev_dbg (dummy_dev(dum
),
1275 "no ep configured for urb %p\n",
1277 maybe_set_status (urb
, -EPROTO
);
1281 if (ep
->already_seen
)
1283 ep
->already_seen
= 1;
1284 if (ep
== &dum
->ep
[0] && urb
->error_count
) {
1285 ep
->setup_stage
= 1; /* a new urb */
1286 urb
->error_count
= 0;
1288 if (ep
->halted
&& !ep
->setup_stage
) {
1289 /* NOTE: must not be iso! */
1290 dev_dbg (dummy_dev(dum
), "ep %s halted, urb %p\n",
1292 maybe_set_status (urb
, -EPIPE
);
1295 /* FIXME make sure both ends agree on maxpacket */
1297 /* handle control requests */
1298 if (ep
== &dum
->ep
[0] && ep
->setup_stage
) {
1299 struct usb_ctrlrequest setup
;
1301 struct dummy_ep
*ep2
;
1305 setup
= *(struct usb_ctrlrequest
*) urb
->setup_packet
;
1306 w_index
= le16_to_cpu(setup
.wIndex
);
1307 w_value
= le16_to_cpu(setup
.wValue
);
1308 if (le16_to_cpu(setup
.wLength
) !=
1309 urb
->transfer_buffer_length
) {
1310 maybe_set_status (urb
, -EOVERFLOW
);
1314 /* paranoia, in case of stale queued data */
1315 list_for_each_entry (req
, &ep
->queue
, queue
) {
1316 list_del_init (&req
->queue
);
1317 req
->req
.status
= -EOVERFLOW
;
1318 dev_dbg (udc_dev(dum
), "stale req = %p\n",
1321 spin_unlock (&dum
->lock
);
1322 req
->req
.complete (&ep
->ep
, &req
->req
);
1323 spin_lock (&dum
->lock
);
1324 ep
->already_seen
= 0;
1328 /* gadget driver never sees set_address or operations
1329 * on standard feature flags. some hardware doesn't
1332 ep
->last_io
= jiffies
;
1333 ep
->setup_stage
= 0;
1335 switch (setup
.bRequest
) {
1336 case USB_REQ_SET_ADDRESS
:
1337 if (setup
.bRequestType
!= Dev_Request
)
1339 dum
->address
= w_value
;
1340 maybe_set_status (urb
, 0);
1341 dev_dbg (udc_dev(dum
), "set_address = %d\n",
1345 case USB_REQ_SET_FEATURE
:
1346 if (setup
.bRequestType
== Dev_Request
) {
1349 case USB_DEVICE_REMOTE_WAKEUP
:
1351 case USB_DEVICE_B_HNP_ENABLE
:
1352 dum
->gadget
.b_hnp_enable
= 1;
1354 case USB_DEVICE_A_HNP_SUPPORT
:
1355 dum
->gadget
.a_hnp_support
= 1;
1357 case USB_DEVICE_A_ALT_HNP_SUPPORT
:
1358 dum
->gadget
.a_alt_hnp_support
1362 value
= -EOPNOTSUPP
;
1367 maybe_set_status (urb
, 0);
1370 } else if (setup
.bRequestType
== Ep_Request
) {
1372 ep2
= find_endpoint (dum
, w_index
);
1374 value
= -EOPNOTSUPP
;
1379 maybe_set_status (urb
, 0);
1382 case USB_REQ_CLEAR_FEATURE
:
1383 if (setup
.bRequestType
== Dev_Request
) {
1385 case USB_DEVICE_REMOTE_WAKEUP
:
1386 dum
->devstatus
&= ~(1 <<
1387 USB_DEVICE_REMOTE_WAKEUP
);
1389 maybe_set_status (urb
, 0);
1392 value
= -EOPNOTSUPP
;
1395 } else if (setup
.bRequestType
== Ep_Request
) {
1397 ep2
= find_endpoint (dum
, w_index
);
1399 value
= -EOPNOTSUPP
;
1404 maybe_set_status (urb
, 0);
1407 case USB_REQ_GET_STATUS
:
1408 if (setup
.bRequestType
== Dev_InRequest
1409 || setup
.bRequestType
1411 || setup
.bRequestType
1416 // device: remote wakeup, selfpowered
1417 // interface: nothing
1419 buf
= (char *)urb
->transfer_buffer
;
1420 if (urb
->transfer_buffer_length
> 0) {
1421 if (setup
.bRequestType
==
1423 ep2
= find_endpoint (dum
, w_index
);
1425 value
= -EOPNOTSUPP
;
1428 buf
[0] = ep2
->halted
;
1429 } else if (setup
.bRequestType
==
1436 if (urb
->transfer_buffer_length
> 1)
1438 urb
->actual_length
= min (2,
1439 urb
->transfer_buffer_length
);
1441 maybe_set_status (urb
, 0);
1446 /* gadget driver handles all other requests. block
1447 * until setup() returns; no reentrancy issues etc.
1450 spin_unlock (&dum
->lock
);
1451 value
= dum
->driver
->setup (&dum
->gadget
,
1453 spin_lock (&dum
->lock
);
1456 /* no delays (max 64KB data stage) */
1458 goto treat_control_like_bulk
;
1460 /* error, see below */
1464 if (value
!= -EOPNOTSUPP
)
1465 dev_dbg (udc_dev(dum
),
1468 maybe_set_status (urb
, -EPIPE
);
1469 urb
->actual_length
= 0;
1475 /* non-control requests */
1477 switch (usb_pipetype (urb
->pipe
)) {
1478 case PIPE_ISOCHRONOUS
:
1479 /* FIXME is it urb->interval since the last xfer?
1480 * use urb->iso_frame_desc[i].
1481 * complete whether or not ep has requests queued.
1482 * report random errors, to debug drivers.
1484 limit
= max (limit
, periodic_bytes (dum
, ep
));
1485 maybe_set_status (urb
, -ENOSYS
);
1488 case PIPE_INTERRUPT
:
1489 /* FIXME is it urb->interval since the last xfer?
1490 * this almost certainly polls too fast.
1492 limit
= max (limit
, periodic_bytes (dum
, ep
));
1495 // case PIPE_BULK: case PIPE_CONTROL:
1497 treat_control_like_bulk
:
1498 ep
->last_io
= jiffies
;
1499 total
= transfer (dum
, urb
, ep
, limit
);
1503 /* incomplete transfer? */
1504 if (urb
->status
== -EINPROGRESS
)
1509 list_del (&urbp
->urbp_list
);
1512 ep
->already_seen
= ep
->setup_stage
= 0;
1514 spin_unlock (&dum
->lock
);
1515 usb_hcd_giveback_urb (dummy_to_hcd(dum
), urb
);
1516 spin_lock (&dum
->lock
);
1521 if (list_empty (&dum
->urbp_list
)) {
1522 usb_put_dev (dum
->udev
);
1524 } else if (dum
->rh_state
== DUMMY_RH_RUNNING
) {
1525 /* want a 1 msec delay here */
1526 mod_timer (&dum
->timer
, jiffies
+ msecs_to_jiffies(1));
1529 spin_unlock_irqrestore (&dum
->lock
, flags
);
1532 /*-------------------------------------------------------------------------*/
1534 #define PORT_C_MASK \
1535 ((USB_PORT_STAT_C_CONNECTION \
1536 | USB_PORT_STAT_C_ENABLE \
1537 | USB_PORT_STAT_C_SUSPEND \
1538 | USB_PORT_STAT_C_OVERCURRENT \
1539 | USB_PORT_STAT_C_RESET) << 16)
1541 static int dummy_hub_status (struct usb_hcd
*hcd
, char *buf
)
1544 unsigned long flags
;
1547 dum
= hcd_to_dummy (hcd
);
1549 spin_lock_irqsave (&dum
->lock
, flags
);
1550 if (!test_bit(HCD_FLAG_HW_ACCESSIBLE
, &hcd
->flags
))
1553 if (dum
->resuming
&& time_after_eq (jiffies
, dum
->re_timeout
)) {
1554 dum
->port_status
|= (USB_PORT_STAT_C_SUSPEND
<< 16);
1555 dum
->port_status
&= ~USB_PORT_STAT_SUSPEND
;
1556 set_link_state (dum
);
1559 if ((dum
->port_status
& PORT_C_MASK
) != 0) {
1561 dev_dbg (dummy_dev(dum
), "port status 0x%08x has changes\n",
1564 if (dum
->rh_state
== DUMMY_RH_SUSPENDED
)
1565 usb_hcd_resume_root_hub (hcd
);
1568 spin_unlock_irqrestore (&dum
->lock
, flags
);
1573 hub_descriptor (struct usb_hub_descriptor
*desc
)
1575 memset (desc
, 0, sizeof *desc
);
1576 desc
->bDescriptorType
= 0x29;
1577 desc
->bDescLength
= 9;
1578 desc
->wHubCharacteristics
= (__force __u16
)
1579 (__constant_cpu_to_le16 (0x0001));
1580 desc
->bNbrPorts
= 1;
1581 desc
->bitmap
[0] = 0xff;
1582 desc
->bitmap
[1] = 0xff;
1585 static int dummy_hub_control (
1586 struct usb_hcd
*hcd
,
1595 unsigned long flags
;
1597 if (!test_bit(HCD_FLAG_HW_ACCESSIBLE
, &hcd
->flags
))
1600 dum
= hcd_to_dummy (hcd
);
1601 spin_lock_irqsave (&dum
->lock
, flags
);
1603 case ClearHubFeature
:
1605 case ClearPortFeature
:
1607 case USB_PORT_FEAT_SUSPEND
:
1608 if (dum
->port_status
& USB_PORT_STAT_SUSPEND
) {
1609 /* 20msec resume signaling */
1611 dum
->re_timeout
= jiffies
+
1612 msecs_to_jiffies(20);
1615 case USB_PORT_FEAT_POWER
:
1616 if (dum
->port_status
& USB_PORT_STAT_POWER
)
1617 dev_dbg (dummy_dev(dum
), "power-off\n");
1620 dum
->port_status
&= ~(1 << wValue
);
1621 set_link_state (dum
);
1624 case GetHubDescriptor
:
1625 hub_descriptor ((struct usb_hub_descriptor
*) buf
);
1628 *(__le32
*) buf
= __constant_cpu_to_le32 (0);
1634 /* whoever resets or resumes must GetPortStatus to
1637 if (dum
->resuming
&&
1638 time_after_eq (jiffies
, dum
->re_timeout
)) {
1639 dum
->port_status
|= (USB_PORT_STAT_C_SUSPEND
<< 16);
1640 dum
->port_status
&= ~USB_PORT_STAT_SUSPEND
;
1642 if ((dum
->port_status
& USB_PORT_STAT_RESET
) != 0 &&
1643 time_after_eq (jiffies
, dum
->re_timeout
)) {
1644 dum
->port_status
|= (USB_PORT_STAT_C_RESET
<< 16);
1645 dum
->port_status
&= ~USB_PORT_STAT_RESET
;
1647 dum
->port_status
|= USB_PORT_STAT_ENABLE
;
1648 /* give it the best speed we agree on */
1649 dum
->gadget
.speed
= dum
->driver
->speed
;
1650 dum
->gadget
.ep0
->maxpacket
= 64;
1651 switch (dum
->gadget
.speed
) {
1652 case USB_SPEED_HIGH
:
1654 USB_PORT_STAT_HIGH_SPEED
;
1657 dum
->gadget
.ep0
->maxpacket
= 8;
1659 USB_PORT_STAT_LOW_SPEED
;
1662 dum
->gadget
.speed
= USB_SPEED_FULL
;
1667 set_link_state (dum
);
1668 ((__le16
*) buf
)[0] = cpu_to_le16 (dum
->port_status
);
1669 ((__le16
*) buf
)[1] = cpu_to_le16 (dum
->port_status
>> 16);
1674 case SetPortFeature
:
1676 case USB_PORT_FEAT_SUSPEND
:
1678 dum
->port_status
|= USB_PORT_STAT_SUSPEND
;
1680 /* HNP would happen here; for now we
1681 * assume b_bus_req is always true.
1683 set_link_state (dum
);
1684 if (((1 << USB_DEVICE_B_HNP_ENABLE
)
1685 & dum
->devstatus
) != 0)
1686 dev_dbg (dummy_dev(dum
),
1690 case USB_PORT_FEAT_POWER
:
1691 dum
->port_status
|= USB_PORT_STAT_POWER
;
1692 set_link_state (dum
);
1694 case USB_PORT_FEAT_RESET
:
1695 /* if it's already enabled, disable */
1696 dum
->port_status
&= ~(USB_PORT_STAT_ENABLE
1697 | USB_PORT_STAT_LOW_SPEED
1698 | USB_PORT_STAT_HIGH_SPEED
);
1700 /* 50msec reset signaling */
1701 dum
->re_timeout
= jiffies
+ msecs_to_jiffies(50);
1704 if ((dum
->port_status
& USB_PORT_STAT_POWER
) != 0) {
1705 dum
->port_status
|= (1 << wValue
);
1706 set_link_state (dum
);
1712 dev_dbg (dummy_dev(dum
),
1713 "hub control req%04x v%04x i%04x l%d\n",
1714 typeReq
, wValue
, wIndex
, wLength
);
1716 /* "protocol stall" on error */
1719 spin_unlock_irqrestore (&dum
->lock
, flags
);
1721 if ((dum
->port_status
& PORT_C_MASK
) != 0)
1722 usb_hcd_poll_rh_status (hcd
);
1726 static int dummy_bus_suspend (struct usb_hcd
*hcd
)
1728 struct dummy
*dum
= hcd_to_dummy (hcd
);
1730 dev_dbg (&hcd
->self
.root_hub
->dev
, "%s\n", __FUNCTION__
);
1732 spin_lock_irq (&dum
->lock
);
1733 dum
->rh_state
= DUMMY_RH_SUSPENDED
;
1734 set_link_state (dum
);
1735 hcd
->state
= HC_STATE_SUSPENDED
;
1736 spin_unlock_irq (&dum
->lock
);
1740 static int dummy_bus_resume (struct usb_hcd
*hcd
)
1742 struct dummy
*dum
= hcd_to_dummy (hcd
);
1745 dev_dbg (&hcd
->self
.root_hub
->dev
, "%s\n", __FUNCTION__
);
1747 spin_lock_irq (&dum
->lock
);
1748 if (!test_bit(HCD_FLAG_HW_ACCESSIBLE
, &hcd
->flags
)) {
1751 dum
->rh_state
= DUMMY_RH_RUNNING
;
1752 set_link_state (dum
);
1753 if (!list_empty(&dum
->urbp_list
))
1754 mod_timer (&dum
->timer
, jiffies
);
1755 hcd
->state
= HC_STATE_RUNNING
;
1757 spin_unlock_irq (&dum
->lock
);
1761 /*-------------------------------------------------------------------------*/
1763 static inline ssize_t
1764 show_urb (char *buf
, size_t size
, struct urb
*urb
)
1766 int ep
= usb_pipeendpoint (urb
->pipe
);
1768 return snprintf (buf
, size
,
1769 "urb/%p %s ep%d%s%s len %d/%d\n",
1772 switch (urb
->dev
->speed
) {
1773 case USB_SPEED_LOW
: s
= "ls"; break;
1774 case USB_SPEED_FULL
: s
= "fs"; break;
1775 case USB_SPEED_HIGH
: s
= "hs"; break;
1776 default: s
= "?"; break;
1778 ep
, ep
? (usb_pipein (urb
->pipe
) ? "in" : "out") : "",
1780 switch (usb_pipetype (urb
->pipe
)) { \
1781 case PIPE_CONTROL
: s
= ""; break; \
1782 case PIPE_BULK
: s
= "-bulk"; break; \
1783 case PIPE_INTERRUPT
: s
= "-int"; break; \
1784 default: s
= "-iso"; break; \
1786 urb
->actual_length
, urb
->transfer_buffer_length
);
1790 show_urbs (struct device
*dev
, struct device_attribute
*attr
, char *buf
)
1792 struct usb_hcd
*hcd
= dev_get_drvdata (dev
);
1793 struct dummy
*dum
= hcd_to_dummy (hcd
);
1796 unsigned long flags
;
1798 spin_lock_irqsave (&dum
->lock
, flags
);
1799 list_for_each_entry (urbp
, &dum
->urbp_list
, urbp_list
) {
1802 temp
= show_urb (buf
, PAGE_SIZE
- size
, urbp
->urb
);
1806 spin_unlock_irqrestore (&dum
->lock
, flags
);
1810 static DEVICE_ATTR (urbs
, S_IRUGO
, show_urbs
, NULL
);
1812 static int dummy_start (struct usb_hcd
*hcd
)
1816 dum
= hcd_to_dummy (hcd
);
1819 * MASTER side init ... we emulate a root hub that'll only ever
1820 * talk to one device (the slave side). Also appears in sysfs,
1821 * just like more familiar pci-based HCDs.
1823 spin_lock_init (&dum
->lock
);
1824 init_timer (&dum
->timer
);
1825 dum
->timer
.function
= dummy_timer
;
1826 dum
->timer
.data
= (unsigned long) dum
;
1827 dum
->rh_state
= DUMMY_RH_RUNNING
;
1829 INIT_LIST_HEAD (&dum
->urbp_list
);
1831 /* only show a low-power port: just 8mA */
1832 hcd
->power_budget
= 8;
1833 hcd
->state
= HC_STATE_RUNNING
;
1834 hcd
->uses_new_polling
= 1;
1836 #ifdef CONFIG_USB_OTG
1837 hcd
->self
.otg_port
= 1;
1840 /* FIXME 'urbs' should be a per-device thing, maybe in usbcore */
1841 return device_create_file (dummy_dev(dum
), &dev_attr_urbs
);
1844 static void dummy_stop (struct usb_hcd
*hcd
)
1848 dum
= hcd_to_dummy (hcd
);
1850 device_remove_file (dummy_dev(dum
), &dev_attr_urbs
);
1851 usb_gadget_unregister_driver (dum
->driver
);
1852 dev_info (dummy_dev(dum
), "stopped\n");
1855 /*-------------------------------------------------------------------------*/
1857 static int dummy_h_get_frame (struct usb_hcd
*hcd
)
1859 return dummy_g_get_frame (NULL
);
1862 static const struct hc_driver dummy_hcd
= {
1863 .description
= (char *) driver_name
,
1864 .product_desc
= "Dummy host controller",
1865 .hcd_priv_size
= sizeof(struct dummy
),
1869 .start
= dummy_start
,
1872 .urb_enqueue
= dummy_urb_enqueue
,
1873 .urb_dequeue
= dummy_urb_dequeue
,
1875 .get_frame_number
= dummy_h_get_frame
,
1877 .hub_status_data
= dummy_hub_status
,
1878 .hub_control
= dummy_hub_control
,
1879 .bus_suspend
= dummy_bus_suspend
,
1880 .bus_resume
= dummy_bus_resume
,
1883 static int dummy_hcd_probe(struct platform_device
*pdev
)
1885 struct usb_hcd
*hcd
;
1888 dev_info(&pdev
->dev
, "%s, driver " DRIVER_VERSION
"\n", driver_desc
);
1890 hcd
= usb_create_hcd(&dummy_hcd
, &pdev
->dev
, pdev
->dev
.bus_id
);
1893 the_controller
= hcd_to_dummy (hcd
);
1895 retval
= usb_add_hcd(hcd
, 0, 0);
1898 the_controller
= NULL
;
1903 static int dummy_hcd_remove (struct platform_device
*pdev
)
1905 struct usb_hcd
*hcd
;
1907 hcd
= platform_get_drvdata (pdev
);
1908 usb_remove_hcd (hcd
);
1910 the_controller
= NULL
;
1914 static int dummy_hcd_suspend (struct platform_device
*pdev
, pm_message_t state
)
1916 struct usb_hcd
*hcd
;
1920 dev_dbg (&pdev
->dev
, "%s\n", __FUNCTION__
);
1922 hcd
= platform_get_drvdata (pdev
);
1923 dum
= hcd_to_dummy (hcd
);
1924 if (dum
->rh_state
== DUMMY_RH_RUNNING
) {
1925 dev_warn(&pdev
->dev
, "Root hub isn't suspended!\n");
1928 clear_bit(HCD_FLAG_HW_ACCESSIBLE
, &hcd
->flags
);
1932 static int dummy_hcd_resume (struct platform_device
*pdev
)
1934 struct usb_hcd
*hcd
;
1936 dev_dbg (&pdev
->dev
, "%s\n", __FUNCTION__
);
1938 hcd
= platform_get_drvdata (pdev
);
1939 set_bit(HCD_FLAG_HW_ACCESSIBLE
, &hcd
->flags
);
1940 usb_hcd_poll_rh_status (hcd
);
1944 static struct platform_driver dummy_hcd_driver
= {
1945 .probe
= dummy_hcd_probe
,
1946 .remove
= dummy_hcd_remove
,
1947 .suspend
= dummy_hcd_suspend
,
1948 .resume
= dummy_hcd_resume
,
1950 .name
= (char *) driver_name
,
1951 .owner
= THIS_MODULE
,
1955 /*-------------------------------------------------------------------------*/
1957 /* These don't need to do anything because the pdev structures are
1958 * statically allocated. */
1960 dummy_udc_release (struct device
*dev
) {}
1963 dummy_hcd_release (struct device
*dev
) {}
1965 static struct platform_device the_udc_pdev
= {
1966 .name
= (char *) gadget_name
,
1969 .release
= dummy_udc_release
,
1973 static struct platform_device the_hcd_pdev
= {
1974 .name
= (char *) driver_name
,
1977 .release
= dummy_hcd_release
,
1981 static int __init
init (void)
1985 if (usb_disabled ())
1988 retval
= platform_driver_register (&dummy_hcd_driver
);
1992 retval
= platform_driver_register (&dummy_udc_driver
);
1994 goto err_register_udc_driver
;
1996 retval
= platform_device_register (&the_hcd_pdev
);
1998 goto err_register_hcd
;
2000 retval
= platform_device_register (&the_udc_pdev
);
2002 goto err_register_udc
;
2006 platform_device_unregister (&the_hcd_pdev
);
2008 platform_driver_unregister (&dummy_udc_driver
);
2009 err_register_udc_driver
:
2010 platform_driver_unregister (&dummy_hcd_driver
);
2015 static void __exit
cleanup (void)
2017 platform_device_unregister (&the_udc_pdev
);
2018 platform_device_unregister (&the_hcd_pdev
);
2019 platform_driver_unregister (&dummy_udc_driver
);
2020 platform_driver_unregister (&dummy_hcd_driver
);
2022 module_exit (cleanup
);