2 * dummy_hcd.c -- Dummy/Loopback USB host and device emulator driver.
4 * Maintainer: Alan Stern <stern@rowland.harvard.edu>
6 * Copyright (C) 2003 David Brownell
7 * Copyright (C) 2003-2005 Alan Stern
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
26 * This exposes a device side "USB gadget" API, driven by requests to a
27 * Linux-USB host controller driver. USB traffic is simulated; there's
28 * no need for USB hardware. Use this with two other drivers:
30 * - Gadget driver, responding to requests (slave);
31 * - Host-side device driver, as already familiar in Linux.
33 * Having this all in one kernel can help some stages of development,
34 * bypassing some hardware (and driver) issues. UML could help too.
37 #include <linux/module.h>
38 #include <linux/kernel.h>
39 #include <linux/delay.h>
40 #include <linux/ioport.h>
41 #include <linux/slab.h>
42 #include <linux/errno.h>
43 #include <linux/init.h>
44 #include <linux/timer.h>
45 #include <linux/list.h>
46 #include <linux/interrupt.h>
47 #include <linux/platform_device.h>
48 #include <linux/usb.h>
49 #include <linux/usb/gadget.h>
51 #include <asm/byteorder.h>
54 #include <asm/system.h>
55 #include <asm/unaligned.h>
58 #include "../core/hcd.h"
61 #define DRIVER_DESC "USB Host+Gadget Emulator"
62 #define DRIVER_VERSION "02 May 2005"
64 #define POWER_BUDGET 500 /* in mA; use 8 for low-power port testing */
66 static const char driver_name
[] = "dummy_hcd";
67 static const char driver_desc
[] = "USB Host+Gadget Emulator";
69 static const char gadget_name
[] = "dummy_udc";
71 MODULE_DESCRIPTION (DRIVER_DESC
);
72 MODULE_AUTHOR ("David Brownell");
73 MODULE_LICENSE ("GPL");
75 /*-------------------------------------------------------------------------*/
77 /* gadget side driver data structres */
79 struct list_head queue
;
80 unsigned long last_io
; /* jiffies timestamp */
81 struct usb_gadget
*gadget
;
82 const struct usb_endpoint_descriptor
*desc
;
85 unsigned already_seen
: 1;
86 unsigned setup_stage
: 1;
89 struct dummy_request
{
90 struct list_head queue
; /* ep's requests */
91 struct usb_request req
;
94 static inline struct dummy_ep
*usb_ep_to_dummy_ep (struct usb_ep
*_ep
)
96 return container_of (_ep
, struct dummy_ep
, ep
);
99 static inline struct dummy_request
*usb_request_to_dummy_request
100 (struct usb_request
*_req
)
102 return container_of (_req
, struct dummy_request
, req
);
105 /*-------------------------------------------------------------------------*/
108 * Every device has ep0 for control requests, plus up to 30 more endpoints,
109 * in one of two types:
111 * - Configurable: direction (in/out), type (bulk, iso, etc), and endpoint
112 * number can be changed. Names like "ep-a" are used for this type.
114 * - Fixed Function: in other cases. some characteristics may be mutable;
115 * that'd be hardware-specific. Names like "ep12out-bulk" are used.
117 * Gadget drivers are responsible for not setting up conflicting endpoint
118 * configurations, illegal or unsupported packet lengths, and so on.
121 static const char ep0name
[] = "ep0";
123 static const char *const ep_name
[] = {
124 ep0name
, /* everyone has ep0 */
126 /* act like a net2280: high speed, six configurable endpoints */
127 "ep-a", "ep-b", "ep-c", "ep-d", "ep-e", "ep-f",
129 /* or like pxa250: fifteen fixed function endpoints */
130 "ep1in-bulk", "ep2out-bulk", "ep3in-iso", "ep4out-iso", "ep5in-int",
131 "ep6in-bulk", "ep7out-bulk", "ep8in-iso", "ep9out-iso", "ep10in-int",
132 "ep11in-bulk", "ep12out-bulk", "ep13in-iso", "ep14out-iso",
135 /* or like sa1100: two fixed function endpoints */
136 "ep1out-bulk", "ep2in-bulk",
138 #define DUMMY_ENDPOINTS ARRAY_SIZE(ep_name)
140 /*-------------------------------------------------------------------------*/
146 struct list_head urbp_list
;
150 enum dummy_rh_state
{
160 * SLAVE/GADGET side support
162 struct dummy_ep ep
[DUMMY_ENDPOINTS
];
164 struct usb_gadget gadget
;
165 struct usb_gadget_driver
*driver
;
166 struct dummy_request fifo_req
;
167 u8 fifo_buf
[FIFO_SIZE
];
169 unsigned udc_suspended
:1;
172 unsigned old_active
:1;
175 * MASTER/HOST side support
177 enum dummy_rh_state rh_state
;
178 struct timer_list timer
;
182 unsigned long re_timeout
;
184 struct usb_device
*udev
;
185 struct list_head urbp_list
;
188 static inline struct dummy
*hcd_to_dummy (struct usb_hcd
*hcd
)
190 return (struct dummy
*) (hcd
->hcd_priv
);
193 static inline struct usb_hcd
*dummy_to_hcd (struct dummy
*dum
)
195 return container_of((void *) dum
, struct usb_hcd
, hcd_priv
);
198 static inline struct device
*dummy_dev (struct dummy
*dum
)
200 return dummy_to_hcd(dum
)->self
.controller
;
203 static inline struct device
*udc_dev (struct dummy
*dum
)
205 return dum
->gadget
.dev
.parent
;
208 static inline struct dummy
*ep_to_dummy (struct dummy_ep
*ep
)
210 return container_of (ep
->gadget
, struct dummy
, gadget
);
213 static inline struct dummy
*gadget_to_dummy (struct usb_gadget
*gadget
)
215 return container_of (gadget
, struct dummy
, gadget
);
218 static inline struct dummy
*gadget_dev_to_dummy (struct device
*dev
)
220 return container_of (dev
, struct dummy
, gadget
.dev
);
223 static struct dummy
*the_controller
;
225 /*-------------------------------------------------------------------------*/
227 /* SLAVE/GADGET SIDE UTILITY ROUTINES */
229 /* called with spinlock held */
230 static void nuke (struct dummy
*dum
, struct dummy_ep
*ep
)
232 while (!list_empty (&ep
->queue
)) {
233 struct dummy_request
*req
;
235 req
= list_entry (ep
->queue
.next
, struct dummy_request
, queue
);
236 list_del_init (&req
->queue
);
237 req
->req
.status
= -ESHUTDOWN
;
239 spin_unlock (&dum
->lock
);
240 req
->req
.complete (&ep
->ep
, &req
->req
);
241 spin_lock (&dum
->lock
);
245 /* caller must hold lock */
247 stop_activity (struct dummy
*dum
)
251 /* prevent any more requests */
254 /* The timer is left running so that outstanding URBs can fail */
256 /* nuke any pending requests first, so driver i/o is quiesced */
257 list_for_each_entry (ep
, &dum
->gadget
.ep_list
, ep
.ep_list
)
260 /* driver now does any non-usb quiescing necessary */
263 /* caller must hold lock */
265 set_link_state (struct dummy
*dum
)
268 if ((dum
->port_status
& USB_PORT_STAT_POWER
) == 0)
269 dum
->port_status
= 0;
271 /* UDC suspend must cause a disconnect */
272 else if (!dum
->pullup
|| dum
->udc_suspended
) {
273 dum
->port_status
&= ~(USB_PORT_STAT_CONNECTION
|
274 USB_PORT_STAT_ENABLE
|
275 USB_PORT_STAT_LOW_SPEED
|
276 USB_PORT_STAT_HIGH_SPEED
|
277 USB_PORT_STAT_SUSPEND
);
278 if ((dum
->old_status
& USB_PORT_STAT_CONNECTION
) != 0)
279 dum
->port_status
|= (USB_PORT_STAT_C_CONNECTION
<< 16);
281 dum
->port_status
|= USB_PORT_STAT_CONNECTION
;
282 if ((dum
->old_status
& USB_PORT_STAT_CONNECTION
) == 0)
283 dum
->port_status
|= (USB_PORT_STAT_C_CONNECTION
<< 16);
284 if ((dum
->port_status
& USB_PORT_STAT_ENABLE
) == 0)
285 dum
->port_status
&= ~USB_PORT_STAT_SUSPEND
;
286 else if ((dum
->port_status
& USB_PORT_STAT_SUSPEND
) == 0 &&
287 dum
->rh_state
!= DUMMY_RH_SUSPENDED
)
291 if ((dum
->port_status
& USB_PORT_STAT_ENABLE
) == 0 || dum
->active
)
294 if ((dum
->port_status
& USB_PORT_STAT_CONNECTION
) == 0 ||
295 (dum
->port_status
& USB_PORT_STAT_RESET
) != 0) {
296 if ((dum
->old_status
& USB_PORT_STAT_CONNECTION
) != 0 &&
297 (dum
->old_status
& USB_PORT_STAT_RESET
) == 0 &&
300 spin_unlock (&dum
->lock
);
301 dum
->driver
->disconnect (&dum
->gadget
);
302 spin_lock (&dum
->lock
);
304 } else if (dum
->active
!= dum
->old_active
) {
305 if (dum
->old_active
&& dum
->driver
->suspend
) {
306 spin_unlock (&dum
->lock
);
307 dum
->driver
->suspend (&dum
->gadget
);
308 spin_lock (&dum
->lock
);
309 } else if (!dum
->old_active
&& dum
->driver
->resume
) {
310 spin_unlock (&dum
->lock
);
311 dum
->driver
->resume (&dum
->gadget
);
312 spin_lock (&dum
->lock
);
316 dum
->old_status
= dum
->port_status
;
317 dum
->old_active
= dum
->active
;
320 /*-------------------------------------------------------------------------*/
322 /* SLAVE/GADGET SIDE DRIVER
324 * This only tracks gadget state. All the work is done when the host
325 * side tries some (emulated) i/o operation. Real device controller
326 * drivers would do real i/o using dma, fifos, irqs, timers, etc.
329 #define is_enabled(dum) \
330 (dum->port_status & USB_PORT_STAT_ENABLE)
333 dummy_enable (struct usb_ep
*_ep
, const struct usb_endpoint_descriptor
*desc
)
340 ep
= usb_ep_to_dummy_ep (_ep
);
341 if (!_ep
|| !desc
|| ep
->desc
|| _ep
->name
== ep0name
342 || desc
->bDescriptorType
!= USB_DT_ENDPOINT
)
344 dum
= ep_to_dummy (ep
);
345 if (!dum
->driver
|| !is_enabled (dum
))
347 max
= le16_to_cpu(desc
->wMaxPacketSize
) & 0x3ff;
349 /* drivers must not request bad settings, since lower levels
350 * (hardware or its drivers) may not check. some endpoints
351 * can't do iso, many have maxpacket limitations, etc.
353 * since this "hardware" driver is here to help debugging, we
354 * have some extra sanity checks. (there could be more though,
355 * especially for "ep9out" style fixed function ones.)
358 switch (desc
->bmAttributes
& 0x03) {
359 case USB_ENDPOINT_XFER_BULK
:
360 if (strstr (ep
->ep
.name
, "-iso")
361 || strstr (ep
->ep
.name
, "-int")) {
364 switch (dum
->gadget
.speed
) {
370 if (max
== 8 || max
== 16 || max
== 32 || max
== 64)
371 /* we'll fake any legal size */
373 /* save a return statement */
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 list_add_tail(&req
->queue
, &ep
->queue
);
546 spin_unlock (&dum
->lock
);
547 _req
->actual
= _req
->length
;
549 _req
->complete (_ep
, _req
);
550 spin_lock (&dum
->lock
);
552 list_add_tail(&req
->queue
, &ep
->queue
);
553 spin_unlock_irqrestore (&dum
->lock
, flags
);
555 /* real hardware would likely enable transfers here, in case
556 * it'd been left NAKing.
561 static int dummy_dequeue (struct usb_ep
*_ep
, struct usb_request
*_req
)
565 int retval
= -EINVAL
;
567 struct dummy_request
*req
= NULL
;
571 ep
= usb_ep_to_dummy_ep (_ep
);
572 dum
= ep_to_dummy (ep
);
577 local_irq_save (flags
);
578 spin_lock (&dum
->lock
);
579 list_for_each_entry (req
, &ep
->queue
, queue
) {
580 if (&req
->req
== _req
) {
581 list_del_init (&req
->queue
);
582 _req
->status
= -ECONNRESET
;
587 spin_unlock (&dum
->lock
);
590 dev_dbg (udc_dev(dum
),
591 "dequeued req %p from %s, len %d buf %p\n",
592 req
, _ep
->name
, _req
->length
, _req
->buf
);
593 _req
->complete (_ep
, _req
);
595 local_irq_restore (flags
);
600 dummy_set_halt (struct usb_ep
*_ep
, int value
)
607 ep
= usb_ep_to_dummy_ep (_ep
);
608 dum
= ep_to_dummy (ep
);
613 else if (ep
->desc
&& (ep
->desc
->bEndpointAddress
& USB_DIR_IN
) &&
614 !list_empty (&ep
->queue
))
618 /* FIXME clear emulated data toggle too */
622 static const struct usb_ep_ops dummy_ep_ops
= {
623 .enable
= dummy_enable
,
624 .disable
= dummy_disable
,
626 .alloc_request
= dummy_alloc_request
,
627 .free_request
= dummy_free_request
,
629 .queue
= dummy_queue
,
630 .dequeue
= dummy_dequeue
,
632 .set_halt
= dummy_set_halt
,
635 /*-------------------------------------------------------------------------*/
637 /* there are both host and device side versions of this call ... */
638 static int dummy_g_get_frame (struct usb_gadget
*_gadget
)
642 do_gettimeofday (&tv
);
643 return tv
.tv_usec
/ 1000;
646 static int dummy_wakeup (struct usb_gadget
*_gadget
)
650 dum
= gadget_to_dummy (_gadget
);
651 if (!(dum
->devstatus
& ( (1 << USB_DEVICE_B_HNP_ENABLE
)
652 | (1 << USB_DEVICE_REMOTE_WAKEUP
))))
654 if ((dum
->port_status
& USB_PORT_STAT_CONNECTION
) == 0)
656 if ((dum
->port_status
& USB_PORT_STAT_SUSPEND
) == 0 &&
657 dum
->rh_state
!= DUMMY_RH_SUSPENDED
)
660 /* FIXME: What if the root hub is suspended but the port isn't? */
662 /* hub notices our request, issues downstream resume, etc */
664 dum
->re_timeout
= jiffies
+ msecs_to_jiffies(20);
665 mod_timer (&dummy_to_hcd (dum
)->rh_timer
, dum
->re_timeout
);
669 static int dummy_set_selfpowered (struct usb_gadget
*_gadget
, int value
)
673 dum
= gadget_to_dummy (_gadget
);
675 dum
->devstatus
|= (1 << USB_DEVICE_SELF_POWERED
);
677 dum
->devstatus
&= ~(1 << USB_DEVICE_SELF_POWERED
);
681 static int dummy_pullup (struct usb_gadget
*_gadget
, int value
)
686 dum
= gadget_to_dummy (_gadget
);
687 spin_lock_irqsave (&dum
->lock
, flags
);
688 dum
->pullup
= (value
!= 0);
689 set_link_state (dum
);
690 spin_unlock_irqrestore (&dum
->lock
, flags
);
692 usb_hcd_poll_rh_status (dummy_to_hcd (dum
));
696 static const struct usb_gadget_ops dummy_ops
= {
697 .get_frame
= dummy_g_get_frame
,
698 .wakeup
= dummy_wakeup
,
699 .set_selfpowered
= dummy_set_selfpowered
,
700 .pullup
= dummy_pullup
,
703 /*-------------------------------------------------------------------------*/
705 /* "function" sysfs attribute */
707 show_function (struct device
*dev
, struct device_attribute
*attr
, char *buf
)
709 struct dummy
*dum
= gadget_dev_to_dummy (dev
);
711 if (!dum
->driver
|| !dum
->driver
->function
)
713 return scnprintf (buf
, PAGE_SIZE
, "%s\n", dum
->driver
->function
);
715 static DEVICE_ATTR (function
, S_IRUGO
, show_function
, NULL
);
717 /*-------------------------------------------------------------------------*/
720 * Driver registration/unregistration.
722 * This is basically hardware-specific; there's usually only one real USB
723 * device (not host) controller since that's how USB devices are intended
724 * to work. So most implementations of these api calls will rely on the
725 * fact that only one driver will ever bind to the hardware. But curious
726 * hardware can be built with discrete components, so the gadget API doesn't
727 * require that assumption.
729 * For this emulator, it might be convenient to create a usb slave device
730 * for each driver that registers: just add to a big root hub.
734 usb_gadget_register_driver (struct usb_gadget_driver
*driver
)
736 struct dummy
*dum
= the_controller
;
743 if (!driver
->bind
|| !driver
->setup
744 || driver
->speed
== USB_SPEED_UNKNOWN
)
748 * SLAVE side init ... the layer above hardware, which
749 * can't enumerate without help from the driver we're binding.
754 INIT_LIST_HEAD (&dum
->gadget
.ep_list
);
755 for (i
= 0; i
< DUMMY_ENDPOINTS
; i
++) {
756 struct dummy_ep
*ep
= &dum
->ep
[i
];
760 ep
->ep
.name
= ep_name
[i
];
761 ep
->ep
.ops
= &dummy_ep_ops
;
762 list_add_tail (&ep
->ep
.ep_list
, &dum
->gadget
.ep_list
);
763 ep
->halted
= ep
->already_seen
= ep
->setup_stage
= 0;
764 ep
->ep
.maxpacket
= ~0;
765 ep
->last_io
= jiffies
;
766 ep
->gadget
= &dum
->gadget
;
768 INIT_LIST_HEAD (&ep
->queue
);
771 dum
->gadget
.ep0
= &dum
->ep
[0].ep
;
772 dum
->ep
[0].ep
.maxpacket
= 64;
773 list_del_init (&dum
->ep
[0].ep
.ep_list
);
774 INIT_LIST_HEAD(&dum
->fifo_req
.queue
);
776 driver
->driver
.bus
= NULL
;
777 dum
->driver
= driver
;
778 dum
->gadget
.dev
.driver
= &driver
->driver
;
779 dev_dbg (udc_dev(dum
), "binding gadget driver '%s'\n",
780 driver
->driver
.name
);
781 retval
= driver
->bind(&dum
->gadget
);
784 dum
->gadget
.dev
.driver
= NULL
;
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
));
797 EXPORT_SYMBOL (usb_gadget_register_driver
);
800 usb_gadget_unregister_driver (struct usb_gadget_driver
*driver
)
802 struct dummy
*dum
= the_controller
;
807 if (!driver
|| driver
!= dum
->driver
|| !driver
->unbind
)
810 dev_dbg (udc_dev(dum
), "unregister gadget driver '%s'\n",
811 driver
->driver
.name
);
813 spin_lock_irqsave (&dum
->lock
, flags
);
815 set_link_state (dum
);
816 spin_unlock_irqrestore (&dum
->lock
, flags
);
818 driver
->unbind (&dum
->gadget
);
819 dum
->gadget
.dev
.driver
= NULL
;
822 spin_lock_irqsave (&dum
->lock
, flags
);
824 set_link_state (dum
);
825 spin_unlock_irqrestore (&dum
->lock
, flags
);
827 usb_hcd_poll_rh_status (dummy_to_hcd (dum
));
830 EXPORT_SYMBOL (usb_gadget_unregister_driver
);
834 /* just declare this in any driver that really need it */
835 extern int net2280_set_fifo_mode (struct usb_gadget
*gadget
, int mode
);
837 int net2280_set_fifo_mode (struct usb_gadget
*gadget
, int mode
)
841 EXPORT_SYMBOL (net2280_set_fifo_mode
);
844 /* The gadget structure is stored inside the hcd structure and will be
845 * released along with it. */
847 dummy_gadget_release (struct device
*dev
)
849 struct dummy
*dum
= gadget_dev_to_dummy (dev
);
851 usb_put_hcd (dummy_to_hcd (dum
));
854 static int dummy_udc_probe (struct platform_device
*pdev
)
856 struct dummy
*dum
= the_controller
;
859 dum
->gadget
.name
= gadget_name
;
860 dum
->gadget
.ops
= &dummy_ops
;
861 dum
->gadget
.is_dualspeed
= 1;
863 /* maybe claim OTG support, though we won't complete HNP */
864 dum
->gadget
.is_otg
= (dummy_to_hcd(dum
)->self
.otg_port
!= 0);
866 dev_set_name(&dum
->gadget
.dev
, "gadget");
867 dum
->gadget
.dev
.parent
= &pdev
->dev
;
868 dum
->gadget
.dev
.release
= dummy_gadget_release
;
869 rc
= device_register (&dum
->gadget
.dev
);
873 usb_get_hcd (dummy_to_hcd (dum
));
875 platform_set_drvdata (pdev
, dum
);
876 rc
= device_create_file (&dum
->gadget
.dev
, &dev_attr_function
);
878 device_unregister (&dum
->gadget
.dev
);
882 static int dummy_udc_remove (struct platform_device
*pdev
)
884 struct dummy
*dum
= platform_get_drvdata (pdev
);
886 platform_set_drvdata (pdev
, NULL
);
887 device_remove_file (&dum
->gadget
.dev
, &dev_attr_function
);
888 device_unregister (&dum
->gadget
.dev
);
892 static int dummy_udc_suspend (struct platform_device
*pdev
, pm_message_t state
)
894 struct dummy
*dum
= platform_get_drvdata(pdev
);
896 dev_dbg (&pdev
->dev
, "%s\n", __func__
);
897 spin_lock_irq (&dum
->lock
);
898 dum
->udc_suspended
= 1;
899 set_link_state (dum
);
900 spin_unlock_irq (&dum
->lock
);
902 usb_hcd_poll_rh_status (dummy_to_hcd (dum
));
906 static int dummy_udc_resume (struct platform_device
*pdev
)
908 struct dummy
*dum
= platform_get_drvdata(pdev
);
910 dev_dbg (&pdev
->dev
, "%s\n", __func__
);
911 spin_lock_irq (&dum
->lock
);
912 dum
->udc_suspended
= 0;
913 set_link_state (dum
);
914 spin_unlock_irq (&dum
->lock
);
916 usb_hcd_poll_rh_status (dummy_to_hcd (dum
));
920 static struct platform_driver dummy_udc_driver
= {
921 .probe
= dummy_udc_probe
,
922 .remove
= dummy_udc_remove
,
923 .suspend
= dummy_udc_suspend
,
924 .resume
= dummy_udc_resume
,
926 .name
= (char *) gadget_name
,
927 .owner
= THIS_MODULE
,
931 /*-------------------------------------------------------------------------*/
933 /* MASTER/HOST SIDE DRIVER
935 * this uses the hcd framework to hook up to host side drivers.
936 * its root hub will only have one device, otherwise it acts like
937 * a normal host controller.
939 * when urbs are queued, they're just stuck on a list that we
940 * scan in a timer callback. that callback connects writes from
941 * the host with reads from the device, and so on, based on the
945 static int dummy_urb_enqueue (
955 if (!urb
->transfer_buffer
&& urb
->transfer_buffer_length
)
958 urbp
= kmalloc (sizeof *urbp
, mem_flags
);
963 dum
= hcd_to_dummy (hcd
);
964 spin_lock_irqsave (&dum
->lock
, flags
);
965 rc
= usb_hcd_link_urb_to_ep(hcd
, urb
);
972 dum
->udev
= urb
->dev
;
973 usb_get_dev (dum
->udev
);
974 } else if (unlikely (dum
->udev
!= urb
->dev
))
975 dev_err (dummy_dev(dum
), "usb_device address has changed!\n");
977 list_add_tail (&urbp
->urbp_list
, &dum
->urbp_list
);
979 if (usb_pipetype (urb
->pipe
) == PIPE_CONTROL
)
980 urb
->error_count
= 1; /* mark as a new urb */
982 /* kick the scheduler, it'll do the rest */
983 if (!timer_pending (&dum
->timer
))
984 mod_timer (&dum
->timer
, jiffies
+ 1);
987 spin_unlock_irqrestore(&dum
->lock
, flags
);
991 static int dummy_urb_dequeue(struct usb_hcd
*hcd
, struct urb
*urb
, int status
)
997 /* giveback happens automatically in timer callback,
998 * so make sure the callback happens */
999 dum
= hcd_to_dummy (hcd
);
1000 spin_lock_irqsave (&dum
->lock
, flags
);
1002 rc
= usb_hcd_check_unlink_urb(hcd
, urb
, status
);
1003 if (!rc
&& dum
->rh_state
!= DUMMY_RH_RUNNING
&&
1004 !list_empty(&dum
->urbp_list
))
1005 mod_timer (&dum
->timer
, jiffies
);
1007 spin_unlock_irqrestore (&dum
->lock
, flags
);
1011 /* transfer up to a frame's worth; caller must own lock */
1013 transfer(struct dummy
*dum
, struct urb
*urb
, struct dummy_ep
*ep
, int limit
,
1016 struct dummy_request
*req
;
1019 /* if there's no request queued, the device is NAKing; return */
1020 list_for_each_entry (req
, &ep
->queue
, queue
) {
1021 unsigned host_len
, dev_len
, len
;
1022 int is_short
, to_host
;
1025 /* 1..N packets of ep->ep.maxpacket each ... the last one
1026 * may be short (including zero length).
1028 * writer can send a zlp explicitly (length 0) or implicitly
1029 * (length mod maxpacket zero, and 'zero' flag); they always
1032 host_len
= urb
->transfer_buffer_length
- urb
->actual_length
;
1033 dev_len
= req
->req
.length
- req
->req
.actual
;
1034 len
= min (host_len
, dev_len
);
1036 /* FIXME update emulated data toggle too */
1038 to_host
= usb_pipein (urb
->pipe
);
1039 if (unlikely (len
== 0))
1044 /* not enough bandwidth left? */
1045 if (limit
< ep
->ep
.maxpacket
&& limit
< len
)
1047 len
= min (len
, (unsigned) limit
);
1051 /* use an extra pass for the final short packet */
1052 if (len
> ep
->ep
.maxpacket
) {
1054 len
-= (len
% ep
->ep
.maxpacket
);
1056 is_short
= (len
% ep
->ep
.maxpacket
) != 0;
1058 /* else transfer packet(s) */
1059 ubuf
= urb
->transfer_buffer
+ urb
->actual_length
;
1060 rbuf
= req
->req
.buf
+ req
->req
.actual
;
1062 memcpy (ubuf
, rbuf
, len
);
1064 memcpy (rbuf
, ubuf
, len
);
1065 ep
->last_io
= jiffies
;
1068 urb
->actual_length
+= len
;
1069 req
->req
.actual
+= len
;
1072 /* short packets terminate, maybe with overflow/underflow.
1073 * it's only really an error to write too much.
1075 * partially filling a buffer optionally blocks queue advances
1076 * (so completion handlers can clean up the queue) but we don't
1077 * need to emulate such data-in-flight.
1080 if (host_len
== dev_len
) {
1081 req
->req
.status
= 0;
1083 } else if (to_host
) {
1084 req
->req
.status
= 0;
1085 if (dev_len
> host_len
)
1086 *status
= -EOVERFLOW
;
1089 } else if (!to_host
) {
1091 if (host_len
> dev_len
)
1092 req
->req
.status
= -EOVERFLOW
;
1094 req
->req
.status
= 0;
1097 /* many requests terminate without a short packet */
1099 if (req
->req
.length
== req
->req
.actual
1101 req
->req
.status
= 0;
1102 if (urb
->transfer_buffer_length
== urb
->actual_length
1103 && !(urb
->transfer_flags
1108 /* device side completion --> continuable */
1109 if (req
->req
.status
!= -EINPROGRESS
) {
1110 list_del_init (&req
->queue
);
1112 spin_unlock (&dum
->lock
);
1113 req
->req
.complete (&ep
->ep
, &req
->req
);
1114 spin_lock (&dum
->lock
);
1116 /* requests might have been unlinked... */
1120 /* host side completion --> terminate */
1121 if (*status
!= -EINPROGRESS
)
1124 /* rescan to continue with any other queued i/o */
1131 static int periodic_bytes (struct dummy
*dum
, struct dummy_ep
*ep
)
1133 int limit
= ep
->ep
.maxpacket
;
1135 if (dum
->gadget
.speed
== USB_SPEED_HIGH
) {
1138 /* high bandwidth mode */
1139 tmp
= le16_to_cpu(ep
->desc
->wMaxPacketSize
);
1140 tmp
= (tmp
>> 11) & 0x03;
1141 tmp
*= 8 /* applies to entire frame */;
1142 limit
+= limit
* tmp
;
1147 #define is_active(dum) ((dum->port_status & \
1148 (USB_PORT_STAT_CONNECTION | USB_PORT_STAT_ENABLE | \
1149 USB_PORT_STAT_SUSPEND)) \
1150 == (USB_PORT_STAT_CONNECTION | USB_PORT_STAT_ENABLE))
1152 static struct dummy_ep
*find_endpoint (struct dummy
*dum
, u8 address
)
1156 if (!is_active (dum
))
1158 if ((address
& ~USB_DIR_IN
) == 0)
1159 return &dum
->ep
[0];
1160 for (i
= 1; i
< DUMMY_ENDPOINTS
; i
++) {
1161 struct dummy_ep
*ep
= &dum
->ep
[i
];
1165 if (ep
->desc
->bEndpointAddress
== address
)
1173 #define Dev_Request (USB_TYPE_STANDARD | USB_RECIP_DEVICE)
1174 #define Dev_InRequest (Dev_Request | USB_DIR_IN)
1175 #define Intf_Request (USB_TYPE_STANDARD | USB_RECIP_INTERFACE)
1176 #define Intf_InRequest (Intf_Request | USB_DIR_IN)
1177 #define Ep_Request (USB_TYPE_STANDARD | USB_RECIP_ENDPOINT)
1178 #define Ep_InRequest (Ep_Request | USB_DIR_IN)
1180 /* drive both sides of the transfers; looks like irq handlers to
1181 * both drivers except the callbacks aren't in_irq().
1183 static void dummy_timer (unsigned long _dum
)
1185 struct dummy
*dum
= (struct dummy
*) _dum
;
1186 struct urbp
*urbp
, *tmp
;
1187 unsigned long flags
;
1191 /* simplistic model for one frame's bandwidth */
1192 switch (dum
->gadget
.speed
) {
1194 total
= 8/*bytes*/ * 12/*packets*/;
1196 case USB_SPEED_FULL
:
1197 total
= 64/*bytes*/ * 19/*packets*/;
1199 case USB_SPEED_HIGH
:
1200 total
= 512/*bytes*/ * 13/*packets*/ * 8/*uframes*/;
1203 dev_err (dummy_dev(dum
), "bogus device speed\n");
1207 /* FIXME if HZ != 1000 this will probably misbehave ... */
1209 /* look at each urb queued by the host side driver */
1210 spin_lock_irqsave (&dum
->lock
, flags
);
1213 dev_err (dummy_dev(dum
),
1214 "timer fired with no URBs pending?\n");
1215 spin_unlock_irqrestore (&dum
->lock
, flags
);
1219 for (i
= 0; i
< DUMMY_ENDPOINTS
; i
++) {
1222 dum
->ep
[i
].already_seen
= 0;
1226 list_for_each_entry_safe (urbp
, tmp
, &dum
->urbp_list
, urbp_list
) {
1228 struct dummy_request
*req
;
1230 struct dummy_ep
*ep
= NULL
;
1232 int status
= -EINPROGRESS
;
1237 else if (dum
->rh_state
!= DUMMY_RH_RUNNING
)
1239 type
= usb_pipetype (urb
->pipe
);
1241 /* used up this frame's non-periodic bandwidth?
1242 * FIXME there's infinite bandwidth for control and
1243 * periodic transfers ... unrealistic.
1245 if (total
<= 0 && type
== PIPE_BULK
)
1248 /* find the gadget's ep for this request (if configured) */
1249 address
= usb_pipeendpoint (urb
->pipe
);
1250 if (usb_pipein (urb
->pipe
))
1251 address
|= USB_DIR_IN
;
1252 ep
= find_endpoint(dum
, address
);
1254 /* set_configuration() disagreement */
1255 dev_dbg (dummy_dev(dum
),
1256 "no ep configured for urb %p\n",
1262 if (ep
->already_seen
)
1264 ep
->already_seen
= 1;
1265 if (ep
== &dum
->ep
[0] && urb
->error_count
) {
1266 ep
->setup_stage
= 1; /* a new urb */
1267 urb
->error_count
= 0;
1269 if (ep
->halted
&& !ep
->setup_stage
) {
1270 /* NOTE: must not be iso! */
1271 dev_dbg (dummy_dev(dum
), "ep %s halted, urb %p\n",
1276 /* FIXME make sure both ends agree on maxpacket */
1278 /* handle control requests */
1279 if (ep
== &dum
->ep
[0] && ep
->setup_stage
) {
1280 struct usb_ctrlrequest setup
;
1282 struct dummy_ep
*ep2
;
1286 setup
= *(struct usb_ctrlrequest
*) urb
->setup_packet
;
1287 w_index
= le16_to_cpu(setup
.wIndex
);
1288 w_value
= le16_to_cpu(setup
.wValue
);
1289 if (le16_to_cpu(setup
.wLength
) !=
1290 urb
->transfer_buffer_length
) {
1291 status
= -EOVERFLOW
;
1295 /* paranoia, in case of stale queued data */
1296 list_for_each_entry (req
, &ep
->queue
, queue
) {
1297 list_del_init (&req
->queue
);
1298 req
->req
.status
= -EOVERFLOW
;
1299 dev_dbg (udc_dev(dum
), "stale req = %p\n",
1302 spin_unlock (&dum
->lock
);
1303 req
->req
.complete (&ep
->ep
, &req
->req
);
1304 spin_lock (&dum
->lock
);
1305 ep
->already_seen
= 0;
1309 /* gadget driver never sees set_address or operations
1310 * on standard feature flags. some hardware doesn't
1313 ep
->last_io
= jiffies
;
1314 ep
->setup_stage
= 0;
1316 switch (setup
.bRequest
) {
1317 case USB_REQ_SET_ADDRESS
:
1318 if (setup
.bRequestType
!= Dev_Request
)
1320 dum
->address
= w_value
;
1322 dev_dbg (udc_dev(dum
), "set_address = %d\n",
1326 case USB_REQ_SET_FEATURE
:
1327 if (setup
.bRequestType
== Dev_Request
) {
1330 case USB_DEVICE_REMOTE_WAKEUP
:
1332 case USB_DEVICE_B_HNP_ENABLE
:
1333 dum
->gadget
.b_hnp_enable
= 1;
1335 case USB_DEVICE_A_HNP_SUPPORT
:
1336 dum
->gadget
.a_hnp_support
= 1;
1338 case USB_DEVICE_A_ALT_HNP_SUPPORT
:
1339 dum
->gadget
.a_alt_hnp_support
1343 value
= -EOPNOTSUPP
;
1351 } else if (setup
.bRequestType
== Ep_Request
) {
1353 ep2
= find_endpoint (dum
, w_index
);
1355 value
= -EOPNOTSUPP
;
1363 case USB_REQ_CLEAR_FEATURE
:
1364 if (setup
.bRequestType
== Dev_Request
) {
1366 case USB_DEVICE_REMOTE_WAKEUP
:
1367 dum
->devstatus
&= ~(1 <<
1368 USB_DEVICE_REMOTE_WAKEUP
);
1373 value
= -EOPNOTSUPP
;
1376 } else if (setup
.bRequestType
== Ep_Request
) {
1378 ep2
= find_endpoint (dum
, w_index
);
1380 value
= -EOPNOTSUPP
;
1388 case USB_REQ_GET_STATUS
:
1389 if (setup
.bRequestType
== Dev_InRequest
1390 || setup
.bRequestType
1392 || setup
.bRequestType
1397 // device: remote wakeup, selfpowered
1398 // interface: nothing
1400 buf
= (char *)urb
->transfer_buffer
;
1401 if (urb
->transfer_buffer_length
> 0) {
1402 if (setup
.bRequestType
==
1404 ep2
= find_endpoint (dum
, w_index
);
1406 value
= -EOPNOTSUPP
;
1409 buf
[0] = ep2
->halted
;
1410 } else if (setup
.bRequestType
==
1417 if (urb
->transfer_buffer_length
> 1)
1419 urb
->actual_length
= min (2,
1420 urb
->transfer_buffer_length
);
1427 /* gadget driver handles all other requests. block
1428 * until setup() returns; no reentrancy issues etc.
1431 spin_unlock (&dum
->lock
);
1432 value
= dum
->driver
->setup (&dum
->gadget
,
1434 spin_lock (&dum
->lock
);
1437 /* no delays (max 64KB data stage) */
1439 goto treat_control_like_bulk
;
1441 /* error, see below */
1445 if (value
!= -EOPNOTSUPP
)
1446 dev_dbg (udc_dev(dum
),
1450 urb
->actual_length
= 0;
1456 /* non-control requests */
1458 switch (usb_pipetype (urb
->pipe
)) {
1459 case PIPE_ISOCHRONOUS
:
1460 /* FIXME is it urb->interval since the last xfer?
1461 * use urb->iso_frame_desc[i].
1462 * complete whether or not ep has requests queued.
1463 * report random errors, to debug drivers.
1465 limit
= max (limit
, periodic_bytes (dum
, ep
));
1469 case PIPE_INTERRUPT
:
1470 /* FIXME is it urb->interval since the last xfer?
1471 * this almost certainly polls too fast.
1473 limit
= max (limit
, periodic_bytes (dum
, ep
));
1476 // case PIPE_BULK: case PIPE_CONTROL:
1478 treat_control_like_bulk
:
1479 ep
->last_io
= jiffies
;
1480 total
= transfer(dum
, urb
, ep
, limit
, &status
);
1484 /* incomplete transfer? */
1485 if (status
== -EINPROGRESS
)
1489 list_del (&urbp
->urbp_list
);
1492 ep
->already_seen
= ep
->setup_stage
= 0;
1494 usb_hcd_unlink_urb_from_ep(dummy_to_hcd(dum
), urb
);
1495 spin_unlock (&dum
->lock
);
1496 usb_hcd_giveback_urb(dummy_to_hcd(dum
), urb
, status
);
1497 spin_lock (&dum
->lock
);
1502 if (list_empty (&dum
->urbp_list
)) {
1503 usb_put_dev (dum
->udev
);
1505 } else if (dum
->rh_state
== DUMMY_RH_RUNNING
) {
1506 /* want a 1 msec delay here */
1507 mod_timer (&dum
->timer
, jiffies
+ msecs_to_jiffies(1));
1510 spin_unlock_irqrestore (&dum
->lock
, flags
);
1513 /*-------------------------------------------------------------------------*/
1515 #define PORT_C_MASK \
1516 ((USB_PORT_STAT_C_CONNECTION \
1517 | USB_PORT_STAT_C_ENABLE \
1518 | USB_PORT_STAT_C_SUSPEND \
1519 | USB_PORT_STAT_C_OVERCURRENT \
1520 | USB_PORT_STAT_C_RESET) << 16)
1522 static int dummy_hub_status (struct usb_hcd
*hcd
, char *buf
)
1525 unsigned long flags
;
1528 dum
= hcd_to_dummy (hcd
);
1530 spin_lock_irqsave (&dum
->lock
, flags
);
1531 if (!test_bit(HCD_FLAG_HW_ACCESSIBLE
, &hcd
->flags
))
1534 if (dum
->resuming
&& time_after_eq (jiffies
, dum
->re_timeout
)) {
1535 dum
->port_status
|= (USB_PORT_STAT_C_SUSPEND
<< 16);
1536 dum
->port_status
&= ~USB_PORT_STAT_SUSPEND
;
1537 set_link_state (dum
);
1540 if ((dum
->port_status
& PORT_C_MASK
) != 0) {
1542 dev_dbg (dummy_dev(dum
), "port status 0x%08x has changes\n",
1545 if (dum
->rh_state
== DUMMY_RH_SUSPENDED
)
1546 usb_hcd_resume_root_hub (hcd
);
1549 spin_unlock_irqrestore (&dum
->lock
, flags
);
1554 hub_descriptor (struct usb_hub_descriptor
*desc
)
1556 memset (desc
, 0, sizeof *desc
);
1557 desc
->bDescriptorType
= 0x29;
1558 desc
->bDescLength
= 9;
1559 desc
->wHubCharacteristics
= cpu_to_le16(0x0001);
1560 desc
->bNbrPorts
= 1;
1561 desc
->bitmap
[0] = 0xff;
1562 desc
->bitmap
[1] = 0xff;
1565 static int dummy_hub_control (
1566 struct usb_hcd
*hcd
,
1575 unsigned long flags
;
1577 if (!test_bit(HCD_FLAG_HW_ACCESSIBLE
, &hcd
->flags
))
1580 dum
= hcd_to_dummy (hcd
);
1581 spin_lock_irqsave (&dum
->lock
, flags
);
1583 case ClearHubFeature
:
1585 case ClearPortFeature
:
1587 case USB_PORT_FEAT_SUSPEND
:
1588 if (dum
->port_status
& USB_PORT_STAT_SUSPEND
) {
1589 /* 20msec resume signaling */
1591 dum
->re_timeout
= jiffies
+
1592 msecs_to_jiffies(20);
1595 case USB_PORT_FEAT_POWER
:
1596 if (dum
->port_status
& USB_PORT_STAT_POWER
)
1597 dev_dbg (dummy_dev(dum
), "power-off\n");
1600 dum
->port_status
&= ~(1 << wValue
);
1601 set_link_state (dum
);
1604 case GetHubDescriptor
:
1605 hub_descriptor ((struct usb_hub_descriptor
*) buf
);
1608 *(__le32
*) buf
= __constant_cpu_to_le32 (0);
1614 /* whoever resets or resumes must GetPortStatus to
1617 if (dum
->resuming
&&
1618 time_after_eq (jiffies
, dum
->re_timeout
)) {
1619 dum
->port_status
|= (USB_PORT_STAT_C_SUSPEND
<< 16);
1620 dum
->port_status
&= ~USB_PORT_STAT_SUSPEND
;
1622 if ((dum
->port_status
& USB_PORT_STAT_RESET
) != 0 &&
1623 time_after_eq (jiffies
, dum
->re_timeout
)) {
1624 dum
->port_status
|= (USB_PORT_STAT_C_RESET
<< 16);
1625 dum
->port_status
&= ~USB_PORT_STAT_RESET
;
1627 dum
->port_status
|= USB_PORT_STAT_ENABLE
;
1628 /* give it the best speed we agree on */
1629 dum
->gadget
.speed
= dum
->driver
->speed
;
1630 dum
->gadget
.ep0
->maxpacket
= 64;
1631 switch (dum
->gadget
.speed
) {
1632 case USB_SPEED_HIGH
:
1634 USB_PORT_STAT_HIGH_SPEED
;
1637 dum
->gadget
.ep0
->maxpacket
= 8;
1639 USB_PORT_STAT_LOW_SPEED
;
1642 dum
->gadget
.speed
= USB_SPEED_FULL
;
1647 set_link_state (dum
);
1648 ((__le16
*) buf
)[0] = cpu_to_le16 (dum
->port_status
);
1649 ((__le16
*) buf
)[1] = cpu_to_le16 (dum
->port_status
>> 16);
1654 case SetPortFeature
:
1656 case USB_PORT_FEAT_SUSPEND
:
1658 dum
->port_status
|= USB_PORT_STAT_SUSPEND
;
1660 /* HNP would happen here; for now we
1661 * assume b_bus_req is always true.
1663 set_link_state (dum
);
1664 if (((1 << USB_DEVICE_B_HNP_ENABLE
)
1665 & dum
->devstatus
) != 0)
1666 dev_dbg (dummy_dev(dum
),
1670 case USB_PORT_FEAT_POWER
:
1671 dum
->port_status
|= USB_PORT_STAT_POWER
;
1672 set_link_state (dum
);
1674 case USB_PORT_FEAT_RESET
:
1675 /* if it's already enabled, disable */
1676 dum
->port_status
&= ~(USB_PORT_STAT_ENABLE
1677 | USB_PORT_STAT_LOW_SPEED
1678 | USB_PORT_STAT_HIGH_SPEED
);
1680 /* 50msec reset signaling */
1681 dum
->re_timeout
= jiffies
+ msecs_to_jiffies(50);
1684 if ((dum
->port_status
& USB_PORT_STAT_POWER
) != 0) {
1685 dum
->port_status
|= (1 << wValue
);
1686 set_link_state (dum
);
1692 dev_dbg (dummy_dev(dum
),
1693 "hub control req%04x v%04x i%04x l%d\n",
1694 typeReq
, wValue
, wIndex
, wLength
);
1696 /* "protocol stall" on error */
1699 spin_unlock_irqrestore (&dum
->lock
, flags
);
1701 if ((dum
->port_status
& PORT_C_MASK
) != 0)
1702 usb_hcd_poll_rh_status (hcd
);
1706 static int dummy_bus_suspend (struct usb_hcd
*hcd
)
1708 struct dummy
*dum
= hcd_to_dummy (hcd
);
1710 dev_dbg (&hcd
->self
.root_hub
->dev
, "%s\n", __func__
);
1712 spin_lock_irq (&dum
->lock
);
1713 dum
->rh_state
= DUMMY_RH_SUSPENDED
;
1714 set_link_state (dum
);
1715 hcd
->state
= HC_STATE_SUSPENDED
;
1716 spin_unlock_irq (&dum
->lock
);
1720 static int dummy_bus_resume (struct usb_hcd
*hcd
)
1722 struct dummy
*dum
= hcd_to_dummy (hcd
);
1725 dev_dbg (&hcd
->self
.root_hub
->dev
, "%s\n", __func__
);
1727 spin_lock_irq (&dum
->lock
);
1728 if (!test_bit(HCD_FLAG_HW_ACCESSIBLE
, &hcd
->flags
)) {
1731 dum
->rh_state
= DUMMY_RH_RUNNING
;
1732 set_link_state (dum
);
1733 if (!list_empty(&dum
->urbp_list
))
1734 mod_timer (&dum
->timer
, jiffies
);
1735 hcd
->state
= HC_STATE_RUNNING
;
1737 spin_unlock_irq (&dum
->lock
);
1741 /*-------------------------------------------------------------------------*/
1743 static inline ssize_t
1744 show_urb (char *buf
, size_t size
, struct urb
*urb
)
1746 int ep
= usb_pipeendpoint (urb
->pipe
);
1748 return snprintf (buf
, size
,
1749 "urb/%p %s ep%d%s%s len %d/%d\n",
1752 switch (urb
->dev
->speed
) {
1753 case USB_SPEED_LOW
: s
= "ls"; break;
1754 case USB_SPEED_FULL
: s
= "fs"; break;
1755 case USB_SPEED_HIGH
: s
= "hs"; break;
1756 default: s
= "?"; break;
1758 ep
, ep
? (usb_pipein (urb
->pipe
) ? "in" : "out") : "",
1760 switch (usb_pipetype (urb
->pipe
)) { \
1761 case PIPE_CONTROL
: s
= ""; break; \
1762 case PIPE_BULK
: s
= "-bulk"; break; \
1763 case PIPE_INTERRUPT
: s
= "-int"; break; \
1764 default: s
= "-iso"; break; \
1766 urb
->actual_length
, urb
->transfer_buffer_length
);
1770 show_urbs (struct device
*dev
, struct device_attribute
*attr
, char *buf
)
1772 struct usb_hcd
*hcd
= dev_get_drvdata (dev
);
1773 struct dummy
*dum
= hcd_to_dummy (hcd
);
1776 unsigned long flags
;
1778 spin_lock_irqsave (&dum
->lock
, flags
);
1779 list_for_each_entry (urbp
, &dum
->urbp_list
, urbp_list
) {
1782 temp
= show_urb (buf
, PAGE_SIZE
- size
, urbp
->urb
);
1786 spin_unlock_irqrestore (&dum
->lock
, flags
);
1790 static DEVICE_ATTR (urbs
, S_IRUGO
, show_urbs
, NULL
);
1792 static int dummy_start (struct usb_hcd
*hcd
)
1796 dum
= hcd_to_dummy (hcd
);
1799 * MASTER side init ... we emulate a root hub that'll only ever
1800 * talk to one device (the slave side). Also appears in sysfs,
1801 * just like more familiar pci-based HCDs.
1803 spin_lock_init (&dum
->lock
);
1804 init_timer (&dum
->timer
);
1805 dum
->timer
.function
= dummy_timer
;
1806 dum
->timer
.data
= (unsigned long) dum
;
1807 dum
->rh_state
= DUMMY_RH_RUNNING
;
1809 INIT_LIST_HEAD (&dum
->urbp_list
);
1811 hcd
->power_budget
= POWER_BUDGET
;
1812 hcd
->state
= HC_STATE_RUNNING
;
1813 hcd
->uses_new_polling
= 1;
1815 #ifdef CONFIG_USB_OTG
1816 hcd
->self
.otg_port
= 1;
1819 /* FIXME 'urbs' should be a per-device thing, maybe in usbcore */
1820 return device_create_file (dummy_dev(dum
), &dev_attr_urbs
);
1823 static void dummy_stop (struct usb_hcd
*hcd
)
1827 dum
= hcd_to_dummy (hcd
);
1829 device_remove_file (dummy_dev(dum
), &dev_attr_urbs
);
1830 usb_gadget_unregister_driver (dum
->driver
);
1831 dev_info (dummy_dev(dum
), "stopped\n");
1834 /*-------------------------------------------------------------------------*/
1836 static int dummy_h_get_frame (struct usb_hcd
*hcd
)
1838 return dummy_g_get_frame (NULL
);
1841 static const struct hc_driver dummy_hcd
= {
1842 .description
= (char *) driver_name
,
1843 .product_desc
= "Dummy host controller",
1844 .hcd_priv_size
= sizeof(struct dummy
),
1848 .start
= dummy_start
,
1851 .urb_enqueue
= dummy_urb_enqueue
,
1852 .urb_dequeue
= dummy_urb_dequeue
,
1854 .get_frame_number
= dummy_h_get_frame
,
1856 .hub_status_data
= dummy_hub_status
,
1857 .hub_control
= dummy_hub_control
,
1858 .bus_suspend
= dummy_bus_suspend
,
1859 .bus_resume
= dummy_bus_resume
,
1862 static int dummy_hcd_probe(struct platform_device
*pdev
)
1864 struct usb_hcd
*hcd
;
1867 dev_info(&pdev
->dev
, "%s, driver " DRIVER_VERSION
"\n", driver_desc
);
1869 hcd
= usb_create_hcd(&dummy_hcd
, &pdev
->dev
, dev_name(&pdev
->dev
));
1872 the_controller
= hcd_to_dummy (hcd
);
1874 retval
= usb_add_hcd(hcd
, 0, 0);
1877 the_controller
= NULL
;
1882 static int dummy_hcd_remove (struct platform_device
*pdev
)
1884 struct usb_hcd
*hcd
;
1886 hcd
= platform_get_drvdata (pdev
);
1887 usb_remove_hcd (hcd
);
1889 the_controller
= NULL
;
1893 static int dummy_hcd_suspend (struct platform_device
*pdev
, pm_message_t state
)
1895 struct usb_hcd
*hcd
;
1899 dev_dbg (&pdev
->dev
, "%s\n", __func__
);
1901 hcd
= platform_get_drvdata (pdev
);
1902 dum
= hcd_to_dummy (hcd
);
1903 if (dum
->rh_state
== DUMMY_RH_RUNNING
) {
1904 dev_warn(&pdev
->dev
, "Root hub isn't suspended!\n");
1907 clear_bit(HCD_FLAG_HW_ACCESSIBLE
, &hcd
->flags
);
1911 static int dummy_hcd_resume (struct platform_device
*pdev
)
1913 struct usb_hcd
*hcd
;
1915 dev_dbg (&pdev
->dev
, "%s\n", __func__
);
1917 hcd
= platform_get_drvdata (pdev
);
1918 set_bit(HCD_FLAG_HW_ACCESSIBLE
, &hcd
->flags
);
1919 usb_hcd_poll_rh_status (hcd
);
1923 static struct platform_driver dummy_hcd_driver
= {
1924 .probe
= dummy_hcd_probe
,
1925 .remove
= dummy_hcd_remove
,
1926 .suspend
= dummy_hcd_suspend
,
1927 .resume
= dummy_hcd_resume
,
1929 .name
= (char *) driver_name
,
1930 .owner
= THIS_MODULE
,
1934 /*-------------------------------------------------------------------------*/
1936 static struct platform_device
*the_udc_pdev
;
1937 static struct platform_device
*the_hcd_pdev
;
1939 static int __init
init (void)
1941 int retval
= -ENOMEM
;
1943 if (usb_disabled ())
1946 the_hcd_pdev
= platform_device_alloc(driver_name
, -1);
1949 the_udc_pdev
= platform_device_alloc(gadget_name
, -1);
1953 retval
= platform_driver_register(&dummy_hcd_driver
);
1955 goto err_register_hcd_driver
;
1956 retval
= platform_driver_register(&dummy_udc_driver
);
1958 goto err_register_udc_driver
;
1960 retval
= platform_device_add(the_hcd_pdev
);
1963 retval
= platform_device_add(the_udc_pdev
);
1969 platform_device_del(the_hcd_pdev
);
1971 platform_driver_unregister(&dummy_udc_driver
);
1972 err_register_udc_driver
:
1973 platform_driver_unregister(&dummy_hcd_driver
);
1974 err_register_hcd_driver
:
1975 platform_device_put(the_udc_pdev
);
1977 platform_device_put(the_hcd_pdev
);
1982 static void __exit
cleanup (void)
1984 platform_device_unregister(the_udc_pdev
);
1985 platform_device_unregister(the_hcd_pdev
);
1986 platform_driver_unregister(&dummy_udc_driver
);
1987 platform_driver_unregister(&dummy_hcd_driver
);
1989 module_exit (cleanup
);