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
;
86 unsigned already_seen
: 1;
87 unsigned setup_stage
: 1;
90 struct dummy_request
{
91 struct list_head queue
; /* ep's requests */
92 struct usb_request req
;
95 static inline struct dummy_ep
*usb_ep_to_dummy_ep (struct usb_ep
*_ep
)
97 return container_of (_ep
, struct dummy_ep
, ep
);
100 static inline struct dummy_request
*usb_request_to_dummy_request
101 (struct usb_request
*_req
)
103 return container_of (_req
, struct dummy_request
, req
);
106 /*-------------------------------------------------------------------------*/
109 * Every device has ep0 for control requests, plus up to 30 more endpoints,
110 * in one of two types:
112 * - Configurable: direction (in/out), type (bulk, iso, etc), and endpoint
113 * number can be changed. Names like "ep-a" are used for this type.
115 * - Fixed Function: in other cases. some characteristics may be mutable;
116 * that'd be hardware-specific. Names like "ep12out-bulk" are used.
118 * Gadget drivers are responsible for not setting up conflicting endpoint
119 * configurations, illegal or unsupported packet lengths, and so on.
122 static const char ep0name
[] = "ep0";
124 static const char *const ep_name
[] = {
125 ep0name
, /* everyone has ep0 */
127 /* act like a net2280: high speed, six configurable endpoints */
128 "ep-a", "ep-b", "ep-c", "ep-d", "ep-e", "ep-f",
130 /* or like pxa250: fifteen fixed function endpoints */
131 "ep1in-bulk", "ep2out-bulk", "ep3in-iso", "ep4out-iso", "ep5in-int",
132 "ep6in-bulk", "ep7out-bulk", "ep8in-iso", "ep9out-iso", "ep10in-int",
133 "ep11in-bulk", "ep12out-bulk", "ep13in-iso", "ep14out-iso",
136 /* or like sa1100: two fixed function endpoints */
137 "ep1out-bulk", "ep2in-bulk",
139 #define DUMMY_ENDPOINTS ARRAY_SIZE(ep_name)
141 /*-------------------------------------------------------------------------*/
147 struct list_head urbp_list
;
151 enum dummy_rh_state
{
161 * SLAVE/GADGET side support
163 struct dummy_ep ep
[DUMMY_ENDPOINTS
];
165 struct usb_gadget gadget
;
166 struct usb_gadget_driver
*driver
;
167 struct dummy_request fifo_req
;
168 u8 fifo_buf
[FIFO_SIZE
];
170 unsigned udc_suspended
:1;
173 unsigned old_active
:1;
176 * MASTER/HOST side support
178 enum dummy_rh_state rh_state
;
179 struct timer_list timer
;
183 unsigned long re_timeout
;
185 struct usb_device
*udev
;
186 struct list_head urbp_list
;
189 static inline struct dummy
*hcd_to_dummy (struct usb_hcd
*hcd
)
191 return (struct dummy
*) (hcd
->hcd_priv
);
194 static inline struct usb_hcd
*dummy_to_hcd (struct dummy
*dum
)
196 return container_of((void *) dum
, struct usb_hcd
, hcd_priv
);
199 static inline struct device
*dummy_dev (struct dummy
*dum
)
201 return dummy_to_hcd(dum
)->self
.controller
;
204 static inline struct device
*udc_dev (struct dummy
*dum
)
206 return dum
->gadget
.dev
.parent
;
209 static inline struct dummy
*ep_to_dummy (struct dummy_ep
*ep
)
211 return container_of (ep
->gadget
, struct dummy
, gadget
);
214 static inline struct dummy
*gadget_to_dummy (struct usb_gadget
*gadget
)
216 return container_of (gadget
, struct dummy
, gadget
);
219 static inline struct dummy
*gadget_dev_to_dummy (struct device
*dev
)
221 return container_of (dev
, struct dummy
, gadget
.dev
);
224 static struct dummy
*the_controller
;
226 /*-------------------------------------------------------------------------*/
228 /* SLAVE/GADGET SIDE UTILITY ROUTINES */
230 /* called with spinlock held */
231 static void nuke (struct dummy
*dum
, struct dummy_ep
*ep
)
233 while (!list_empty (&ep
->queue
)) {
234 struct dummy_request
*req
;
236 req
= list_entry (ep
->queue
.next
, struct dummy_request
, queue
);
237 list_del_init (&req
->queue
);
238 req
->req
.status
= -ESHUTDOWN
;
240 spin_unlock (&dum
->lock
);
241 req
->req
.complete (&ep
->ep
, &req
->req
);
242 spin_lock (&dum
->lock
);
246 /* caller must hold lock */
248 stop_activity (struct dummy
*dum
)
252 /* prevent any more requests */
255 /* The timer is left running so that outstanding URBs can fail */
257 /* nuke any pending requests first, so driver i/o is quiesced */
258 list_for_each_entry (ep
, &dum
->gadget
.ep_list
, ep
.ep_list
)
261 /* driver now does any non-usb quiescing necessary */
264 /* caller must hold lock */
266 set_link_state (struct dummy
*dum
)
269 if ((dum
->port_status
& USB_PORT_STAT_POWER
) == 0)
270 dum
->port_status
= 0;
272 /* UDC suspend must cause a disconnect */
273 else if (!dum
->pullup
|| dum
->udc_suspended
) {
274 dum
->port_status
&= ~(USB_PORT_STAT_CONNECTION
|
275 USB_PORT_STAT_ENABLE
|
276 USB_PORT_STAT_LOW_SPEED
|
277 USB_PORT_STAT_HIGH_SPEED
|
278 USB_PORT_STAT_SUSPEND
);
279 if ((dum
->old_status
& USB_PORT_STAT_CONNECTION
) != 0)
280 dum
->port_status
|= (USB_PORT_STAT_C_CONNECTION
<< 16);
282 dum
->port_status
|= USB_PORT_STAT_CONNECTION
;
283 if ((dum
->old_status
& USB_PORT_STAT_CONNECTION
) == 0)
284 dum
->port_status
|= (USB_PORT_STAT_C_CONNECTION
<< 16);
285 if ((dum
->port_status
& USB_PORT_STAT_ENABLE
) == 0)
286 dum
->port_status
&= ~USB_PORT_STAT_SUSPEND
;
287 else if ((dum
->port_status
& USB_PORT_STAT_SUSPEND
) == 0 &&
288 dum
->rh_state
!= DUMMY_RH_SUSPENDED
)
292 if ((dum
->port_status
& USB_PORT_STAT_ENABLE
) == 0 || dum
->active
)
295 if ((dum
->port_status
& USB_PORT_STAT_CONNECTION
) == 0 ||
296 (dum
->port_status
& USB_PORT_STAT_RESET
) != 0) {
297 if ((dum
->old_status
& USB_PORT_STAT_CONNECTION
) != 0 &&
298 (dum
->old_status
& USB_PORT_STAT_RESET
) == 0 &&
301 spin_unlock (&dum
->lock
);
302 dum
->driver
->disconnect (&dum
->gadget
);
303 spin_lock (&dum
->lock
);
305 } else if (dum
->active
!= dum
->old_active
) {
306 if (dum
->old_active
&& dum
->driver
->suspend
) {
307 spin_unlock (&dum
->lock
);
308 dum
->driver
->suspend (&dum
->gadget
);
309 spin_lock (&dum
->lock
);
310 } else if (!dum
->old_active
&& dum
->driver
->resume
) {
311 spin_unlock (&dum
->lock
);
312 dum
->driver
->resume (&dum
->gadget
);
313 spin_lock (&dum
->lock
);
317 dum
->old_status
= dum
->port_status
;
318 dum
->old_active
= dum
->active
;
321 /*-------------------------------------------------------------------------*/
323 /* SLAVE/GADGET SIDE DRIVER
325 * This only tracks gadget state. All the work is done when the host
326 * side tries some (emulated) i/o operation. Real device controller
327 * drivers would do real i/o using dma, fifos, irqs, timers, etc.
330 #define is_enabled(dum) \
331 (dum->port_status & USB_PORT_STAT_ENABLE)
334 dummy_enable (struct usb_ep
*_ep
, const struct usb_endpoint_descriptor
*desc
)
341 ep
= usb_ep_to_dummy_ep (_ep
);
342 if (!_ep
|| !desc
|| ep
->desc
|| _ep
->name
== ep0name
343 || desc
->bDescriptorType
!= USB_DT_ENDPOINT
)
345 dum
= ep_to_dummy (ep
);
346 if (!dum
->driver
|| !is_enabled (dum
))
348 max
= le16_to_cpu(desc
->wMaxPacketSize
) & 0x3ff;
350 /* drivers must not request bad settings, since lower levels
351 * (hardware or its drivers) may not check. some endpoints
352 * can't do iso, many have maxpacket limitations, etc.
354 * since this "hardware" driver is here to help debugging, we
355 * have some extra sanity checks. (there could be more though,
356 * especially for "ep9out" style fixed function ones.)
359 switch (desc
->bmAttributes
& 0x03) {
360 case USB_ENDPOINT_XFER_BULK
:
361 if (strstr (ep
->ep
.name
, "-iso")
362 || strstr (ep
->ep
.name
, "-int")) {
365 switch (dum
->gadget
.speed
) {
371 if (max
== 8 || max
== 16 || max
== 32 || max
== 64)
372 /* we'll fake any legal size */
374 /* save a return statement */
379 case USB_ENDPOINT_XFER_INT
:
380 if (strstr (ep
->ep
.name
, "-iso")) /* bulk is ok */
382 /* real hardware might not handle all packet sizes */
383 switch (dum
->gadget
.speed
) {
387 /* save a return statement */
391 /* save a return statement */
398 case USB_ENDPOINT_XFER_ISOC
:
399 if (strstr (ep
->ep
.name
, "-bulk")
400 || strstr (ep
->ep
.name
, "-int"))
402 /* real hardware might not handle all packet sizes */
403 switch (dum
->gadget
.speed
) {
407 /* save a return statement */
411 /* save a return statement */
417 /* few chips support control except on ep0 */
421 _ep
->maxpacket
= max
;
424 dev_dbg (udc_dev(dum
), "enabled %s (ep%d%s-%s) maxpacket %d\n",
426 desc
->bEndpointAddress
& 0x0f,
427 (desc
->bEndpointAddress
& USB_DIR_IN
) ? "in" : "out",
429 switch (desc
->bmAttributes
& 0x03) {
430 case USB_ENDPOINT_XFER_BULK
: val
= "bulk"; break;
431 case USB_ENDPOINT_XFER_ISOC
: val
= "iso"; break;
432 case USB_ENDPOINT_XFER_INT
: val
= "intr"; break;
433 default: val
= "ctrl"; break;
437 /* at this point real hardware should be NAKing transfers
438 * to that endpoint, until a buffer is queued to it.
440 ep
->halted
= ep
->wedged
= 0;
446 static int dummy_disable (struct usb_ep
*_ep
)
453 ep
= usb_ep_to_dummy_ep (_ep
);
454 if (!_ep
|| !ep
->desc
|| _ep
->name
== ep0name
)
456 dum
= ep_to_dummy (ep
);
458 spin_lock_irqsave (&dum
->lock
, flags
);
462 spin_unlock_irqrestore (&dum
->lock
, flags
);
464 dev_dbg (udc_dev(dum
), "disabled %s\n", _ep
->name
);
468 static struct usb_request
*
469 dummy_alloc_request (struct usb_ep
*_ep
, gfp_t mem_flags
)
472 struct dummy_request
*req
;
476 ep
= usb_ep_to_dummy_ep (_ep
);
478 req
= kzalloc(sizeof(*req
), mem_flags
);
481 INIT_LIST_HEAD (&req
->queue
);
486 dummy_free_request (struct usb_ep
*_ep
, struct usb_request
*_req
)
489 struct dummy_request
*req
;
491 ep
= usb_ep_to_dummy_ep (_ep
);
492 if (!ep
|| !_req
|| (!ep
->desc
&& _ep
->name
!= ep0name
))
495 req
= usb_request_to_dummy_request (_req
);
496 WARN_ON (!list_empty (&req
->queue
));
501 fifo_complete (struct usb_ep
*ep
, struct usb_request
*req
)
506 dummy_queue (struct usb_ep
*_ep
, struct usb_request
*_req
,
510 struct dummy_request
*req
;
514 req
= usb_request_to_dummy_request (_req
);
515 if (!_req
|| !list_empty (&req
->queue
) || !_req
->complete
)
518 ep
= usb_ep_to_dummy_ep (_ep
);
519 if (!_ep
|| (!ep
->desc
&& _ep
->name
!= ep0name
))
522 dum
= ep_to_dummy (ep
);
523 if (!dum
->driver
|| !is_enabled (dum
))
527 dev_dbg (udc_dev(dum
), "ep %p queue req %p to %s, len %d buf %p\n",
528 ep
, _req
, _ep
->name
, _req
->length
, _req
->buf
);
531 _req
->status
= -EINPROGRESS
;
533 spin_lock_irqsave (&dum
->lock
, flags
);
535 /* implement an emulated single-request FIFO */
536 if (ep
->desc
&& (ep
->desc
->bEndpointAddress
& USB_DIR_IN
) &&
537 list_empty (&dum
->fifo_req
.queue
) &&
538 list_empty (&ep
->queue
) &&
539 _req
->length
<= FIFO_SIZE
) {
540 req
= &dum
->fifo_req
;
542 req
->req
.buf
= dum
->fifo_buf
;
543 memcpy (dum
->fifo_buf
, _req
->buf
, _req
->length
);
544 req
->req
.context
= dum
;
545 req
->req
.complete
= fifo_complete
;
547 list_add_tail(&req
->queue
, &ep
->queue
);
548 spin_unlock (&dum
->lock
);
549 _req
->actual
= _req
->length
;
551 _req
->complete (_ep
, _req
);
552 spin_lock (&dum
->lock
);
554 list_add_tail(&req
->queue
, &ep
->queue
);
555 spin_unlock_irqrestore (&dum
->lock
, flags
);
557 /* real hardware would likely enable transfers here, in case
558 * it'd been left NAKing.
563 static int dummy_dequeue (struct usb_ep
*_ep
, struct usb_request
*_req
)
567 int retval
= -EINVAL
;
569 struct dummy_request
*req
= NULL
;
573 ep
= usb_ep_to_dummy_ep (_ep
);
574 dum
= ep_to_dummy (ep
);
579 local_irq_save (flags
);
580 spin_lock (&dum
->lock
);
581 list_for_each_entry (req
, &ep
->queue
, queue
) {
582 if (&req
->req
== _req
) {
583 list_del_init (&req
->queue
);
584 _req
->status
= -ECONNRESET
;
589 spin_unlock (&dum
->lock
);
592 dev_dbg (udc_dev(dum
),
593 "dequeued req %p from %s, len %d buf %p\n",
594 req
, _ep
->name
, _req
->length
, _req
->buf
);
595 _req
->complete (_ep
, _req
);
597 local_irq_restore (flags
);
602 dummy_set_halt_and_wedge(struct usb_ep
*_ep
, int value
, int wedged
)
609 ep
= usb_ep_to_dummy_ep (_ep
);
610 dum
= ep_to_dummy (ep
);
614 ep
->halted
= ep
->wedged
= 0;
615 else if (ep
->desc
&& (ep
->desc
->bEndpointAddress
& USB_DIR_IN
) &&
616 !list_empty (&ep
->queue
))
623 /* FIXME clear emulated data toggle too */
628 dummy_set_halt(struct usb_ep
*_ep
, int value
)
630 return dummy_set_halt_and_wedge(_ep
, value
, 0);
633 static int dummy_set_wedge(struct usb_ep
*_ep
)
635 if (!_ep
|| _ep
->name
== ep0name
)
637 return dummy_set_halt_and_wedge(_ep
, 1, 1);
640 static const struct usb_ep_ops dummy_ep_ops
= {
641 .enable
= dummy_enable
,
642 .disable
= dummy_disable
,
644 .alloc_request
= dummy_alloc_request
,
645 .free_request
= dummy_free_request
,
647 .queue
= dummy_queue
,
648 .dequeue
= dummy_dequeue
,
650 .set_halt
= dummy_set_halt
,
651 .set_wedge
= dummy_set_wedge
,
654 /*-------------------------------------------------------------------------*/
656 /* there are both host and device side versions of this call ... */
657 static int dummy_g_get_frame (struct usb_gadget
*_gadget
)
661 do_gettimeofday (&tv
);
662 return tv
.tv_usec
/ 1000;
665 static int dummy_wakeup (struct usb_gadget
*_gadget
)
669 dum
= gadget_to_dummy (_gadget
);
670 if (!(dum
->devstatus
& ( (1 << USB_DEVICE_B_HNP_ENABLE
)
671 | (1 << USB_DEVICE_REMOTE_WAKEUP
))))
673 if ((dum
->port_status
& USB_PORT_STAT_CONNECTION
) == 0)
675 if ((dum
->port_status
& USB_PORT_STAT_SUSPEND
) == 0 &&
676 dum
->rh_state
!= DUMMY_RH_SUSPENDED
)
679 /* FIXME: What if the root hub is suspended but the port isn't? */
681 /* hub notices our request, issues downstream resume, etc */
683 dum
->re_timeout
= jiffies
+ msecs_to_jiffies(20);
684 mod_timer (&dummy_to_hcd (dum
)->rh_timer
, dum
->re_timeout
);
688 static int dummy_set_selfpowered (struct usb_gadget
*_gadget
, int value
)
692 dum
= gadget_to_dummy (_gadget
);
694 dum
->devstatus
|= (1 << USB_DEVICE_SELF_POWERED
);
696 dum
->devstatus
&= ~(1 << USB_DEVICE_SELF_POWERED
);
700 static int dummy_pullup (struct usb_gadget
*_gadget
, int value
)
705 dum
= gadget_to_dummy (_gadget
);
706 spin_lock_irqsave (&dum
->lock
, flags
);
707 dum
->pullup
= (value
!= 0);
708 set_link_state (dum
);
709 spin_unlock_irqrestore (&dum
->lock
, flags
);
711 usb_hcd_poll_rh_status (dummy_to_hcd (dum
));
715 static const struct usb_gadget_ops dummy_ops
= {
716 .get_frame
= dummy_g_get_frame
,
717 .wakeup
= dummy_wakeup
,
718 .set_selfpowered
= dummy_set_selfpowered
,
719 .pullup
= dummy_pullup
,
722 /*-------------------------------------------------------------------------*/
724 /* "function" sysfs attribute */
726 show_function (struct device
*dev
, struct device_attribute
*attr
, char *buf
)
728 struct dummy
*dum
= gadget_dev_to_dummy (dev
);
730 if (!dum
->driver
|| !dum
->driver
->function
)
732 return scnprintf (buf
, PAGE_SIZE
, "%s\n", dum
->driver
->function
);
734 static DEVICE_ATTR (function
, S_IRUGO
, show_function
, NULL
);
736 /*-------------------------------------------------------------------------*/
739 * Driver registration/unregistration.
741 * This is basically hardware-specific; there's usually only one real USB
742 * device (not host) controller since that's how USB devices are intended
743 * to work. So most implementations of these api calls will rely on the
744 * fact that only one driver will ever bind to the hardware. But curious
745 * hardware can be built with discrete components, so the gadget API doesn't
746 * require that assumption.
748 * For this emulator, it might be convenient to create a usb slave device
749 * for each driver that registers: just add to a big root hub.
753 usb_gadget_register_driver (struct usb_gadget_driver
*driver
)
755 struct dummy
*dum
= the_controller
;
762 if (!driver
->bind
|| !driver
->setup
763 || driver
->speed
== USB_SPEED_UNKNOWN
)
767 * SLAVE side init ... the layer above hardware, which
768 * can't enumerate without help from the driver we're binding.
773 INIT_LIST_HEAD (&dum
->gadget
.ep_list
);
774 for (i
= 0; i
< DUMMY_ENDPOINTS
; i
++) {
775 struct dummy_ep
*ep
= &dum
->ep
[i
];
779 ep
->ep
.name
= ep_name
[i
];
780 ep
->ep
.ops
= &dummy_ep_ops
;
781 list_add_tail (&ep
->ep
.ep_list
, &dum
->gadget
.ep_list
);
782 ep
->halted
= ep
->wedged
= ep
->already_seen
=
784 ep
->ep
.maxpacket
= ~0;
785 ep
->last_io
= jiffies
;
786 ep
->gadget
= &dum
->gadget
;
788 INIT_LIST_HEAD (&ep
->queue
);
791 dum
->gadget
.ep0
= &dum
->ep
[0].ep
;
792 dum
->ep
[0].ep
.maxpacket
= 64;
793 list_del_init (&dum
->ep
[0].ep
.ep_list
);
794 INIT_LIST_HEAD(&dum
->fifo_req
.queue
);
796 driver
->driver
.bus
= NULL
;
797 dum
->driver
= driver
;
798 dum
->gadget
.dev
.driver
= &driver
->driver
;
799 dev_dbg (udc_dev(dum
), "binding gadget driver '%s'\n",
800 driver
->driver
.name
);
801 retval
= driver
->bind(&dum
->gadget
);
804 dum
->gadget
.dev
.driver
= NULL
;
808 /* khubd will enumerate this in a while */
809 spin_lock_irq (&dum
->lock
);
811 set_link_state (dum
);
812 spin_unlock_irq (&dum
->lock
);
814 usb_hcd_poll_rh_status (dummy_to_hcd (dum
));
817 EXPORT_SYMBOL (usb_gadget_register_driver
);
820 usb_gadget_unregister_driver (struct usb_gadget_driver
*driver
)
822 struct dummy
*dum
= the_controller
;
827 if (!driver
|| driver
!= dum
->driver
|| !driver
->unbind
)
830 dev_dbg (udc_dev(dum
), "unregister gadget driver '%s'\n",
831 driver
->driver
.name
);
833 spin_lock_irqsave (&dum
->lock
, flags
);
835 set_link_state (dum
);
836 spin_unlock_irqrestore (&dum
->lock
, flags
);
838 driver
->unbind (&dum
->gadget
);
839 dum
->gadget
.dev
.driver
= NULL
;
842 spin_lock_irqsave (&dum
->lock
, flags
);
844 set_link_state (dum
);
845 spin_unlock_irqrestore (&dum
->lock
, flags
);
847 usb_hcd_poll_rh_status (dummy_to_hcd (dum
));
850 EXPORT_SYMBOL (usb_gadget_unregister_driver
);
854 /* just declare this in any driver that really need it */
855 extern int net2280_set_fifo_mode (struct usb_gadget
*gadget
, int mode
);
857 int net2280_set_fifo_mode (struct usb_gadget
*gadget
, int mode
)
861 EXPORT_SYMBOL (net2280_set_fifo_mode
);
864 /* The gadget structure is stored inside the hcd structure and will be
865 * released along with it. */
867 dummy_gadget_release (struct device
*dev
)
869 struct dummy
*dum
= gadget_dev_to_dummy (dev
);
871 usb_put_hcd (dummy_to_hcd (dum
));
874 static int dummy_udc_probe (struct platform_device
*pdev
)
876 struct dummy
*dum
= the_controller
;
879 dum
->gadget
.name
= gadget_name
;
880 dum
->gadget
.ops
= &dummy_ops
;
881 dum
->gadget
.is_dualspeed
= 1;
883 /* maybe claim OTG support, though we won't complete HNP */
884 dum
->gadget
.is_otg
= (dummy_to_hcd(dum
)->self
.otg_port
!= 0);
886 dev_set_name(&dum
->gadget
.dev
, "gadget");
887 dum
->gadget
.dev
.parent
= &pdev
->dev
;
888 dum
->gadget
.dev
.release
= dummy_gadget_release
;
889 rc
= device_register (&dum
->gadget
.dev
);
893 usb_get_hcd (dummy_to_hcd (dum
));
895 platform_set_drvdata (pdev
, dum
);
896 rc
= device_create_file (&dum
->gadget
.dev
, &dev_attr_function
);
898 device_unregister (&dum
->gadget
.dev
);
902 static int dummy_udc_remove (struct platform_device
*pdev
)
904 struct dummy
*dum
= platform_get_drvdata (pdev
);
906 platform_set_drvdata (pdev
, NULL
);
907 device_remove_file (&dum
->gadget
.dev
, &dev_attr_function
);
908 device_unregister (&dum
->gadget
.dev
);
912 static int dummy_udc_suspend (struct platform_device
*pdev
, pm_message_t state
)
914 struct dummy
*dum
= platform_get_drvdata(pdev
);
916 dev_dbg (&pdev
->dev
, "%s\n", __func__
);
917 spin_lock_irq (&dum
->lock
);
918 dum
->udc_suspended
= 1;
919 set_link_state (dum
);
920 spin_unlock_irq (&dum
->lock
);
922 usb_hcd_poll_rh_status (dummy_to_hcd (dum
));
926 static int dummy_udc_resume (struct platform_device
*pdev
)
928 struct dummy
*dum
= platform_get_drvdata(pdev
);
930 dev_dbg (&pdev
->dev
, "%s\n", __func__
);
931 spin_lock_irq (&dum
->lock
);
932 dum
->udc_suspended
= 0;
933 set_link_state (dum
);
934 spin_unlock_irq (&dum
->lock
);
936 usb_hcd_poll_rh_status (dummy_to_hcd (dum
));
940 static struct platform_driver dummy_udc_driver
= {
941 .probe
= dummy_udc_probe
,
942 .remove
= dummy_udc_remove
,
943 .suspend
= dummy_udc_suspend
,
944 .resume
= dummy_udc_resume
,
946 .name
= (char *) gadget_name
,
947 .owner
= THIS_MODULE
,
951 /*-------------------------------------------------------------------------*/
953 /* MASTER/HOST SIDE DRIVER
955 * this uses the hcd framework to hook up to host side drivers.
956 * its root hub will only have one device, otherwise it acts like
957 * a normal host controller.
959 * when urbs are queued, they're just stuck on a list that we
960 * scan in a timer callback. that callback connects writes from
961 * the host with reads from the device, and so on, based on the
965 static int dummy_urb_enqueue (
975 if (!urb
->transfer_buffer
&& urb
->transfer_buffer_length
)
978 urbp
= kmalloc (sizeof *urbp
, mem_flags
);
983 dum
= hcd_to_dummy (hcd
);
984 spin_lock_irqsave (&dum
->lock
, flags
);
985 rc
= usb_hcd_link_urb_to_ep(hcd
, urb
);
992 dum
->udev
= urb
->dev
;
993 usb_get_dev (dum
->udev
);
994 } else if (unlikely (dum
->udev
!= urb
->dev
))
995 dev_err (dummy_dev(dum
), "usb_device address has changed!\n");
997 list_add_tail (&urbp
->urbp_list
, &dum
->urbp_list
);
999 if (usb_pipetype (urb
->pipe
) == PIPE_CONTROL
)
1000 urb
->error_count
= 1; /* mark as a new urb */
1002 /* kick the scheduler, it'll do the rest */
1003 if (!timer_pending (&dum
->timer
))
1004 mod_timer (&dum
->timer
, jiffies
+ 1);
1007 spin_unlock_irqrestore(&dum
->lock
, flags
);
1011 static int dummy_urb_dequeue(struct usb_hcd
*hcd
, struct urb
*urb
, int status
)
1014 unsigned long flags
;
1017 /* giveback happens automatically in timer callback,
1018 * so make sure the callback happens */
1019 dum
= hcd_to_dummy (hcd
);
1020 spin_lock_irqsave (&dum
->lock
, flags
);
1022 rc
= usb_hcd_check_unlink_urb(hcd
, urb
, status
);
1023 if (!rc
&& dum
->rh_state
!= DUMMY_RH_RUNNING
&&
1024 !list_empty(&dum
->urbp_list
))
1025 mod_timer (&dum
->timer
, jiffies
);
1027 spin_unlock_irqrestore (&dum
->lock
, flags
);
1031 /* transfer up to a frame's worth; caller must own lock */
1033 transfer(struct dummy
*dum
, struct urb
*urb
, struct dummy_ep
*ep
, int limit
,
1036 struct dummy_request
*req
;
1039 /* if there's no request queued, the device is NAKing; return */
1040 list_for_each_entry (req
, &ep
->queue
, queue
) {
1041 unsigned host_len
, dev_len
, len
;
1042 int is_short
, to_host
;
1045 /* 1..N packets of ep->ep.maxpacket each ... the last one
1046 * may be short (including zero length).
1048 * writer can send a zlp explicitly (length 0) or implicitly
1049 * (length mod maxpacket zero, and 'zero' flag); they always
1052 host_len
= urb
->transfer_buffer_length
- urb
->actual_length
;
1053 dev_len
= req
->req
.length
- req
->req
.actual
;
1054 len
= min (host_len
, dev_len
);
1056 /* FIXME update emulated data toggle too */
1058 to_host
= usb_pipein (urb
->pipe
);
1059 if (unlikely (len
== 0))
1064 /* not enough bandwidth left? */
1065 if (limit
< ep
->ep
.maxpacket
&& limit
< len
)
1067 len
= min (len
, (unsigned) limit
);
1071 /* use an extra pass for the final short packet */
1072 if (len
> ep
->ep
.maxpacket
) {
1074 len
-= (len
% ep
->ep
.maxpacket
);
1076 is_short
= (len
% ep
->ep
.maxpacket
) != 0;
1078 /* else transfer packet(s) */
1079 ubuf
= urb
->transfer_buffer
+ urb
->actual_length
;
1080 rbuf
= req
->req
.buf
+ req
->req
.actual
;
1082 memcpy (ubuf
, rbuf
, len
);
1084 memcpy (rbuf
, ubuf
, len
);
1085 ep
->last_io
= jiffies
;
1088 urb
->actual_length
+= len
;
1089 req
->req
.actual
+= len
;
1092 /* short packets terminate, maybe with overflow/underflow.
1093 * it's only really an error to write too much.
1095 * partially filling a buffer optionally blocks queue advances
1096 * (so completion handlers can clean up the queue) but we don't
1097 * need to emulate such data-in-flight.
1100 if (host_len
== dev_len
) {
1101 req
->req
.status
= 0;
1103 } else if (to_host
) {
1104 req
->req
.status
= 0;
1105 if (dev_len
> host_len
)
1106 *status
= -EOVERFLOW
;
1109 } else if (!to_host
) {
1111 if (host_len
> dev_len
)
1112 req
->req
.status
= -EOVERFLOW
;
1114 req
->req
.status
= 0;
1117 /* many requests terminate without a short packet */
1119 if (req
->req
.length
== req
->req
.actual
1121 req
->req
.status
= 0;
1122 if (urb
->transfer_buffer_length
== urb
->actual_length
1123 && !(urb
->transfer_flags
1128 /* device side completion --> continuable */
1129 if (req
->req
.status
!= -EINPROGRESS
) {
1130 list_del_init (&req
->queue
);
1132 spin_unlock (&dum
->lock
);
1133 req
->req
.complete (&ep
->ep
, &req
->req
);
1134 spin_lock (&dum
->lock
);
1136 /* requests might have been unlinked... */
1140 /* host side completion --> terminate */
1141 if (*status
!= -EINPROGRESS
)
1144 /* rescan to continue with any other queued i/o */
1151 static int periodic_bytes (struct dummy
*dum
, struct dummy_ep
*ep
)
1153 int limit
= ep
->ep
.maxpacket
;
1155 if (dum
->gadget
.speed
== USB_SPEED_HIGH
) {
1158 /* high bandwidth mode */
1159 tmp
= le16_to_cpu(ep
->desc
->wMaxPacketSize
);
1160 tmp
= (tmp
>> 11) & 0x03;
1161 tmp
*= 8 /* applies to entire frame */;
1162 limit
+= limit
* tmp
;
1167 #define is_active(dum) ((dum->port_status & \
1168 (USB_PORT_STAT_CONNECTION | USB_PORT_STAT_ENABLE | \
1169 USB_PORT_STAT_SUSPEND)) \
1170 == (USB_PORT_STAT_CONNECTION | USB_PORT_STAT_ENABLE))
1172 static struct dummy_ep
*find_endpoint (struct dummy
*dum
, u8 address
)
1176 if (!is_active (dum
))
1178 if ((address
& ~USB_DIR_IN
) == 0)
1179 return &dum
->ep
[0];
1180 for (i
= 1; i
< DUMMY_ENDPOINTS
; i
++) {
1181 struct dummy_ep
*ep
= &dum
->ep
[i
];
1185 if (ep
->desc
->bEndpointAddress
== address
)
1193 #define Dev_Request (USB_TYPE_STANDARD | USB_RECIP_DEVICE)
1194 #define Dev_InRequest (Dev_Request | USB_DIR_IN)
1195 #define Intf_Request (USB_TYPE_STANDARD | USB_RECIP_INTERFACE)
1196 #define Intf_InRequest (Intf_Request | USB_DIR_IN)
1197 #define Ep_Request (USB_TYPE_STANDARD | USB_RECIP_ENDPOINT)
1198 #define Ep_InRequest (Ep_Request | USB_DIR_IN)
1200 /* drive both sides of the transfers; looks like irq handlers to
1201 * both drivers except the callbacks aren't in_irq().
1203 static void dummy_timer (unsigned long _dum
)
1205 struct dummy
*dum
= (struct dummy
*) _dum
;
1206 struct urbp
*urbp
, *tmp
;
1207 unsigned long flags
;
1211 /* simplistic model for one frame's bandwidth */
1212 switch (dum
->gadget
.speed
) {
1214 total
= 8/*bytes*/ * 12/*packets*/;
1216 case USB_SPEED_FULL
:
1217 total
= 64/*bytes*/ * 19/*packets*/;
1219 case USB_SPEED_HIGH
:
1220 total
= 512/*bytes*/ * 13/*packets*/ * 8/*uframes*/;
1223 dev_err (dummy_dev(dum
), "bogus device speed\n");
1227 /* FIXME if HZ != 1000 this will probably misbehave ... */
1229 /* look at each urb queued by the host side driver */
1230 spin_lock_irqsave (&dum
->lock
, flags
);
1233 dev_err (dummy_dev(dum
),
1234 "timer fired with no URBs pending?\n");
1235 spin_unlock_irqrestore (&dum
->lock
, flags
);
1239 for (i
= 0; i
< DUMMY_ENDPOINTS
; i
++) {
1242 dum
->ep
[i
].already_seen
= 0;
1246 list_for_each_entry_safe (urbp
, tmp
, &dum
->urbp_list
, urbp_list
) {
1248 struct dummy_request
*req
;
1250 struct dummy_ep
*ep
= NULL
;
1252 int status
= -EINPROGRESS
;
1257 else if (dum
->rh_state
!= DUMMY_RH_RUNNING
)
1259 type
= usb_pipetype (urb
->pipe
);
1261 /* used up this frame's non-periodic bandwidth?
1262 * FIXME there's infinite bandwidth for control and
1263 * periodic transfers ... unrealistic.
1265 if (total
<= 0 && type
== PIPE_BULK
)
1268 /* find the gadget's ep for this request (if configured) */
1269 address
= usb_pipeendpoint (urb
->pipe
);
1270 if (usb_pipein (urb
->pipe
))
1271 address
|= USB_DIR_IN
;
1272 ep
= find_endpoint(dum
, address
);
1274 /* set_configuration() disagreement */
1275 dev_dbg (dummy_dev(dum
),
1276 "no ep configured for urb %p\n",
1282 if (ep
->already_seen
)
1284 ep
->already_seen
= 1;
1285 if (ep
== &dum
->ep
[0] && urb
->error_count
) {
1286 ep
->setup_stage
= 1; /* a new urb */
1287 urb
->error_count
= 0;
1289 if (ep
->halted
&& !ep
->setup_stage
) {
1290 /* NOTE: must not be iso! */
1291 dev_dbg (dummy_dev(dum
), "ep %s halted, urb %p\n",
1296 /* FIXME make sure both ends agree on maxpacket */
1298 /* handle control requests */
1299 if (ep
== &dum
->ep
[0] && ep
->setup_stage
) {
1300 struct usb_ctrlrequest setup
;
1302 struct dummy_ep
*ep2
;
1306 setup
= *(struct usb_ctrlrequest
*) urb
->setup_packet
;
1307 w_index
= le16_to_cpu(setup
.wIndex
);
1308 w_value
= le16_to_cpu(setup
.wValue
);
1309 if (le16_to_cpu(setup
.wLength
) !=
1310 urb
->transfer_buffer_length
) {
1311 status
= -EOVERFLOW
;
1315 /* paranoia, in case of stale queued data */
1316 list_for_each_entry (req
, &ep
->queue
, queue
) {
1317 list_del_init (&req
->queue
);
1318 req
->req
.status
= -EOVERFLOW
;
1319 dev_dbg (udc_dev(dum
), "stale req = %p\n",
1322 spin_unlock (&dum
->lock
);
1323 req
->req
.complete (&ep
->ep
, &req
->req
);
1324 spin_lock (&dum
->lock
);
1325 ep
->already_seen
= 0;
1329 /* gadget driver never sees set_address or operations
1330 * on standard feature flags. some hardware doesn't
1333 ep
->last_io
= jiffies
;
1334 ep
->setup_stage
= 0;
1336 switch (setup
.bRequest
) {
1337 case USB_REQ_SET_ADDRESS
:
1338 if (setup
.bRequestType
!= Dev_Request
)
1340 dum
->address
= w_value
;
1342 dev_dbg (udc_dev(dum
), "set_address = %d\n",
1346 case USB_REQ_SET_FEATURE
:
1347 if (setup
.bRequestType
== Dev_Request
) {
1350 case USB_DEVICE_REMOTE_WAKEUP
:
1352 case USB_DEVICE_B_HNP_ENABLE
:
1353 dum
->gadget
.b_hnp_enable
= 1;
1355 case USB_DEVICE_A_HNP_SUPPORT
:
1356 dum
->gadget
.a_hnp_support
= 1;
1358 case USB_DEVICE_A_ALT_HNP_SUPPORT
:
1359 dum
->gadget
.a_alt_hnp_support
1363 value
= -EOPNOTSUPP
;
1371 } else if (setup
.bRequestType
== Ep_Request
) {
1373 ep2
= find_endpoint (dum
, w_index
);
1374 if (!ep2
|| ep2
->ep
.name
== ep0name
) {
1375 value
= -EOPNOTSUPP
;
1383 case USB_REQ_CLEAR_FEATURE
:
1384 if (setup
.bRequestType
== Dev_Request
) {
1386 case USB_DEVICE_REMOTE_WAKEUP
:
1387 dum
->devstatus
&= ~(1 <<
1388 USB_DEVICE_REMOTE_WAKEUP
);
1393 value
= -EOPNOTSUPP
;
1396 } else if (setup
.bRequestType
== Ep_Request
) {
1398 ep2
= find_endpoint (dum
, w_index
);
1400 value
= -EOPNOTSUPP
;
1409 case USB_REQ_GET_STATUS
:
1410 if (setup
.bRequestType
== Dev_InRequest
1411 || setup
.bRequestType
1413 || setup
.bRequestType
1418 // device: remote wakeup, selfpowered
1419 // interface: nothing
1421 buf
= (char *)urb
->transfer_buffer
;
1422 if (urb
->transfer_buffer_length
> 0) {
1423 if (setup
.bRequestType
==
1425 ep2
= find_endpoint (dum
, w_index
);
1427 value
= -EOPNOTSUPP
;
1430 buf
[0] = ep2
->halted
;
1431 } else if (setup
.bRequestType
==
1438 if (urb
->transfer_buffer_length
> 1)
1440 urb
->actual_length
= min (2,
1441 urb
->transfer_buffer_length
);
1448 /* gadget driver handles all other requests. block
1449 * until setup() returns; no reentrancy issues etc.
1452 spin_unlock (&dum
->lock
);
1453 value
= dum
->driver
->setup (&dum
->gadget
,
1455 spin_lock (&dum
->lock
);
1458 /* no delays (max 64KB data stage) */
1460 goto treat_control_like_bulk
;
1462 /* error, see below */
1466 if (value
!= -EOPNOTSUPP
)
1467 dev_dbg (udc_dev(dum
),
1471 urb
->actual_length
= 0;
1477 /* non-control requests */
1479 switch (usb_pipetype (urb
->pipe
)) {
1480 case PIPE_ISOCHRONOUS
:
1481 /* FIXME is it urb->interval since the last xfer?
1482 * use urb->iso_frame_desc[i].
1483 * complete whether or not ep has requests queued.
1484 * report random errors, to debug drivers.
1486 limit
= max (limit
, periodic_bytes (dum
, ep
));
1490 case PIPE_INTERRUPT
:
1491 /* FIXME is it urb->interval since the last xfer?
1492 * this almost certainly polls too fast.
1494 limit
= max (limit
, periodic_bytes (dum
, ep
));
1497 // case PIPE_BULK: case PIPE_CONTROL:
1499 treat_control_like_bulk
:
1500 ep
->last_io
= jiffies
;
1501 total
= transfer(dum
, urb
, ep
, limit
, &status
);
1505 /* incomplete transfer? */
1506 if (status
== -EINPROGRESS
)
1510 list_del (&urbp
->urbp_list
);
1513 ep
->already_seen
= ep
->setup_stage
= 0;
1515 usb_hcd_unlink_urb_from_ep(dummy_to_hcd(dum
), urb
);
1516 spin_unlock (&dum
->lock
);
1517 usb_hcd_giveback_urb(dummy_to_hcd(dum
), urb
, status
);
1518 spin_lock (&dum
->lock
);
1523 if (list_empty (&dum
->urbp_list
)) {
1524 usb_put_dev (dum
->udev
);
1526 } else if (dum
->rh_state
== DUMMY_RH_RUNNING
) {
1527 /* want a 1 msec delay here */
1528 mod_timer (&dum
->timer
, jiffies
+ msecs_to_jiffies(1));
1531 spin_unlock_irqrestore (&dum
->lock
, flags
);
1534 /*-------------------------------------------------------------------------*/
1536 #define PORT_C_MASK \
1537 ((USB_PORT_STAT_C_CONNECTION \
1538 | USB_PORT_STAT_C_ENABLE \
1539 | USB_PORT_STAT_C_SUSPEND \
1540 | USB_PORT_STAT_C_OVERCURRENT \
1541 | USB_PORT_STAT_C_RESET) << 16)
1543 static int dummy_hub_status (struct usb_hcd
*hcd
, char *buf
)
1546 unsigned long flags
;
1549 dum
= hcd_to_dummy (hcd
);
1551 spin_lock_irqsave (&dum
->lock
, flags
);
1552 if (!test_bit(HCD_FLAG_HW_ACCESSIBLE
, &hcd
->flags
))
1555 if (dum
->resuming
&& time_after_eq (jiffies
, dum
->re_timeout
)) {
1556 dum
->port_status
|= (USB_PORT_STAT_C_SUSPEND
<< 16);
1557 dum
->port_status
&= ~USB_PORT_STAT_SUSPEND
;
1558 set_link_state (dum
);
1561 if ((dum
->port_status
& PORT_C_MASK
) != 0) {
1563 dev_dbg (dummy_dev(dum
), "port status 0x%08x has changes\n",
1566 if (dum
->rh_state
== DUMMY_RH_SUSPENDED
)
1567 usb_hcd_resume_root_hub (hcd
);
1570 spin_unlock_irqrestore (&dum
->lock
, flags
);
1575 hub_descriptor (struct usb_hub_descriptor
*desc
)
1577 memset (desc
, 0, sizeof *desc
);
1578 desc
->bDescriptorType
= 0x29;
1579 desc
->bDescLength
= 9;
1580 desc
->wHubCharacteristics
= cpu_to_le16(0x0001);
1581 desc
->bNbrPorts
= 1;
1582 desc
->bitmap
[0] = 0xff;
1583 desc
->bitmap
[1] = 0xff;
1586 static int dummy_hub_control (
1587 struct usb_hcd
*hcd
,
1596 unsigned long flags
;
1598 if (!test_bit(HCD_FLAG_HW_ACCESSIBLE
, &hcd
->flags
))
1601 dum
= hcd_to_dummy (hcd
);
1602 spin_lock_irqsave (&dum
->lock
, flags
);
1604 case ClearHubFeature
:
1606 case ClearPortFeature
:
1608 case USB_PORT_FEAT_SUSPEND
:
1609 if (dum
->port_status
& USB_PORT_STAT_SUSPEND
) {
1610 /* 20msec resume signaling */
1612 dum
->re_timeout
= jiffies
+
1613 msecs_to_jiffies(20);
1616 case USB_PORT_FEAT_POWER
:
1617 if (dum
->port_status
& USB_PORT_STAT_POWER
)
1618 dev_dbg (dummy_dev(dum
), "power-off\n");
1621 dum
->port_status
&= ~(1 << wValue
);
1622 set_link_state (dum
);
1625 case GetHubDescriptor
:
1626 hub_descriptor ((struct usb_hub_descriptor
*) buf
);
1629 *(__le32
*) buf
= cpu_to_le32 (0);
1635 /* whoever resets or resumes must GetPortStatus to
1638 if (dum
->resuming
&&
1639 time_after_eq (jiffies
, dum
->re_timeout
)) {
1640 dum
->port_status
|= (USB_PORT_STAT_C_SUSPEND
<< 16);
1641 dum
->port_status
&= ~USB_PORT_STAT_SUSPEND
;
1643 if ((dum
->port_status
& USB_PORT_STAT_RESET
) != 0 &&
1644 time_after_eq (jiffies
, dum
->re_timeout
)) {
1645 dum
->port_status
|= (USB_PORT_STAT_C_RESET
<< 16);
1646 dum
->port_status
&= ~USB_PORT_STAT_RESET
;
1648 dum
->port_status
|= USB_PORT_STAT_ENABLE
;
1649 /* give it the best speed we agree on */
1650 dum
->gadget
.speed
= dum
->driver
->speed
;
1651 dum
->gadget
.ep0
->maxpacket
= 64;
1652 switch (dum
->gadget
.speed
) {
1653 case USB_SPEED_HIGH
:
1655 USB_PORT_STAT_HIGH_SPEED
;
1658 dum
->gadget
.ep0
->maxpacket
= 8;
1660 USB_PORT_STAT_LOW_SPEED
;
1663 dum
->gadget
.speed
= USB_SPEED_FULL
;
1668 set_link_state (dum
);
1669 ((__le16
*) buf
)[0] = cpu_to_le16 (dum
->port_status
);
1670 ((__le16
*) buf
)[1] = cpu_to_le16 (dum
->port_status
>> 16);
1675 case SetPortFeature
:
1677 case USB_PORT_FEAT_SUSPEND
:
1679 dum
->port_status
|= USB_PORT_STAT_SUSPEND
;
1681 /* HNP would happen here; for now we
1682 * assume b_bus_req is always true.
1684 set_link_state (dum
);
1685 if (((1 << USB_DEVICE_B_HNP_ENABLE
)
1686 & dum
->devstatus
) != 0)
1687 dev_dbg (dummy_dev(dum
),
1691 case USB_PORT_FEAT_POWER
:
1692 dum
->port_status
|= USB_PORT_STAT_POWER
;
1693 set_link_state (dum
);
1695 case USB_PORT_FEAT_RESET
:
1696 /* if it's already enabled, disable */
1697 dum
->port_status
&= ~(USB_PORT_STAT_ENABLE
1698 | USB_PORT_STAT_LOW_SPEED
1699 | USB_PORT_STAT_HIGH_SPEED
);
1701 /* 50msec reset signaling */
1702 dum
->re_timeout
= jiffies
+ msecs_to_jiffies(50);
1705 if ((dum
->port_status
& USB_PORT_STAT_POWER
) != 0) {
1706 dum
->port_status
|= (1 << wValue
);
1707 set_link_state (dum
);
1713 dev_dbg (dummy_dev(dum
),
1714 "hub control req%04x v%04x i%04x l%d\n",
1715 typeReq
, wValue
, wIndex
, wLength
);
1717 /* "protocol stall" on error */
1720 spin_unlock_irqrestore (&dum
->lock
, flags
);
1722 if ((dum
->port_status
& PORT_C_MASK
) != 0)
1723 usb_hcd_poll_rh_status (hcd
);
1727 static int dummy_bus_suspend (struct usb_hcd
*hcd
)
1729 struct dummy
*dum
= hcd_to_dummy (hcd
);
1731 dev_dbg (&hcd
->self
.root_hub
->dev
, "%s\n", __func__
);
1733 spin_lock_irq (&dum
->lock
);
1734 dum
->rh_state
= DUMMY_RH_SUSPENDED
;
1735 set_link_state (dum
);
1736 hcd
->state
= HC_STATE_SUSPENDED
;
1737 spin_unlock_irq (&dum
->lock
);
1741 static int dummy_bus_resume (struct usb_hcd
*hcd
)
1743 struct dummy
*dum
= hcd_to_dummy (hcd
);
1746 dev_dbg (&hcd
->self
.root_hub
->dev
, "%s\n", __func__
);
1748 spin_lock_irq (&dum
->lock
);
1749 if (!test_bit(HCD_FLAG_HW_ACCESSIBLE
, &hcd
->flags
)) {
1752 dum
->rh_state
= DUMMY_RH_RUNNING
;
1753 set_link_state (dum
);
1754 if (!list_empty(&dum
->urbp_list
))
1755 mod_timer (&dum
->timer
, jiffies
);
1756 hcd
->state
= HC_STATE_RUNNING
;
1758 spin_unlock_irq (&dum
->lock
);
1762 /*-------------------------------------------------------------------------*/
1764 static inline ssize_t
1765 show_urb (char *buf
, size_t size
, struct urb
*urb
)
1767 int ep
= usb_pipeendpoint (urb
->pipe
);
1769 return snprintf (buf
, size
,
1770 "urb/%p %s ep%d%s%s len %d/%d\n",
1773 switch (urb
->dev
->speed
) {
1774 case USB_SPEED_LOW
: s
= "ls"; break;
1775 case USB_SPEED_FULL
: s
= "fs"; break;
1776 case USB_SPEED_HIGH
: s
= "hs"; break;
1777 default: s
= "?"; break;
1779 ep
, ep
? (usb_pipein (urb
->pipe
) ? "in" : "out") : "",
1781 switch (usb_pipetype (urb
->pipe
)) { \
1782 case PIPE_CONTROL
: s
= ""; break; \
1783 case PIPE_BULK
: s
= "-bulk"; break; \
1784 case PIPE_INTERRUPT
: s
= "-int"; break; \
1785 default: s
= "-iso"; break; \
1787 urb
->actual_length
, urb
->transfer_buffer_length
);
1791 show_urbs (struct device
*dev
, struct device_attribute
*attr
, char *buf
)
1793 struct usb_hcd
*hcd
= dev_get_drvdata (dev
);
1794 struct dummy
*dum
= hcd_to_dummy (hcd
);
1797 unsigned long flags
;
1799 spin_lock_irqsave (&dum
->lock
, flags
);
1800 list_for_each_entry (urbp
, &dum
->urbp_list
, urbp_list
) {
1803 temp
= show_urb (buf
, PAGE_SIZE
- size
, urbp
->urb
);
1807 spin_unlock_irqrestore (&dum
->lock
, flags
);
1811 static DEVICE_ATTR (urbs
, S_IRUGO
, show_urbs
, NULL
);
1813 static int dummy_start (struct usb_hcd
*hcd
)
1817 dum
= hcd_to_dummy (hcd
);
1820 * MASTER side init ... we emulate a root hub that'll only ever
1821 * talk to one device (the slave side). Also appears in sysfs,
1822 * just like more familiar pci-based HCDs.
1824 spin_lock_init (&dum
->lock
);
1825 init_timer (&dum
->timer
);
1826 dum
->timer
.function
= dummy_timer
;
1827 dum
->timer
.data
= (unsigned long) dum
;
1828 dum
->rh_state
= DUMMY_RH_RUNNING
;
1830 INIT_LIST_HEAD (&dum
->urbp_list
);
1832 hcd
->power_budget
= POWER_BUDGET
;
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
, dev_name(&pdev
->dev
));
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", __func__
);
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", __func__
);
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 static struct platform_device
*the_udc_pdev
;
1958 static struct platform_device
*the_hcd_pdev
;
1960 static int __init
init (void)
1962 int retval
= -ENOMEM
;
1964 if (usb_disabled ())
1967 the_hcd_pdev
= platform_device_alloc(driver_name
, -1);
1970 the_udc_pdev
= platform_device_alloc(gadget_name
, -1);
1974 retval
= platform_driver_register(&dummy_hcd_driver
);
1976 goto err_register_hcd_driver
;
1977 retval
= platform_driver_register(&dummy_udc_driver
);
1979 goto err_register_udc_driver
;
1981 retval
= platform_device_add(the_hcd_pdev
);
1984 retval
= platform_device_add(the_udc_pdev
);
1990 platform_device_del(the_hcd_pdev
);
1992 platform_driver_unregister(&dummy_udc_driver
);
1993 err_register_udc_driver
:
1994 platform_driver_unregister(&dummy_hcd_driver
);
1995 err_register_hcd_driver
:
1996 platform_device_put(the_udc_pdev
);
1998 platform_device_put(the_hcd_pdev
);
2003 static void __exit
cleanup (void)
2005 platform_device_unregister(the_udc_pdev
);
2006 platform_device_unregister(the_hcd_pdev
);
2007 platform_driver_unregister(&dummy_udc_driver
);
2008 platform_driver_unregister(&dummy_hcd_driver
);
2010 module_exit (cleanup
);