2 * dummy_hcd.c -- Dummy/Loopback USB host and device emulator driver.
4 * Maintainer: Alan Stern <stern@rowland.harvard.edu>
6 * Copyright (C) 2003 David Brownell
7 * Copyright (C) 2003-2005 Alan Stern
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
26 * This exposes a device side "USB gadget" API, driven by requests to a
27 * Linux-USB host controller driver. USB traffic is simulated; there's
28 * no need for USB hardware. Use this with two other drivers:
30 * - Gadget driver, responding to requests (slave);
31 * - Host-side device driver, as already familiar in Linux.
33 * Having this all in one kernel can help some stages of development,
34 * bypassing some hardware (and driver) issues. UML could help too.
39 #include <linux/config.h>
40 #include <linux/module.h>
41 #include <linux/kernel.h>
42 #include <linux/delay.h>
43 #include <linux/ioport.h>
44 #include <linux/sched.h>
45 #include <linux/slab.h>
46 #include <linux/smp_lock.h>
47 #include <linux/errno.h>
48 #include <linux/init.h>
49 #include <linux/timer.h>
50 #include <linux/list.h>
51 #include <linux/interrupt.h>
52 #include <linux/version.h>
54 #include <linux/usb.h>
55 #include <linux/usb_gadget.h>
57 #include <asm/byteorder.h>
60 #include <asm/system.h>
61 #include <asm/unaligned.h>
64 #include "../core/hcd.h"
67 #define DRIVER_DESC "USB Host+Gadget Emulator"
68 #define DRIVER_VERSION "17 Dec 2004"
70 static const char driver_name
[] = "dummy_hcd";
71 static const char driver_desc
[] = "USB Host+Gadget Emulator";
73 static const char gadget_name
[] = "dummy_udc";
75 MODULE_DESCRIPTION (DRIVER_DESC
);
76 MODULE_AUTHOR ("David Brownell");
77 MODULE_LICENSE ("GPL");
79 /*-------------------------------------------------------------------------*/
81 /* gadget side driver data structres */
83 struct list_head queue
;
84 unsigned long last_io
; /* jiffies timestamp */
85 struct usb_gadget
*gadget
;
86 const struct usb_endpoint_descriptor
*desc
;
89 unsigned already_seen
: 1;
90 unsigned setup_stage
: 1;
93 struct dummy_request
{
94 struct list_head queue
; /* ep's requests */
95 struct usb_request req
;
98 static inline struct dummy_ep
*usb_ep_to_dummy_ep (struct usb_ep
*_ep
)
100 return container_of (_ep
, struct dummy_ep
, ep
);
103 static inline struct dummy_request
*usb_request_to_dummy_request
104 (struct usb_request
*_req
)
106 return container_of (_req
, struct dummy_request
, req
);
109 /*-------------------------------------------------------------------------*/
112 * Every device has ep0 for control requests, plus up to 30 more endpoints,
113 * in one of two types:
115 * - Configurable: direction (in/out), type (bulk, iso, etc), and endpoint
116 * number can be changed. Names like "ep-a" are used for this type.
118 * - Fixed Function: in other cases. some characteristics may be mutable;
119 * that'd be hardware-specific. Names like "ep12out-bulk" are used.
121 * Gadget drivers are responsible for not setting up conflicting endpoint
122 * configurations, illegal or unsupported packet lengths, and so on.
125 static const char ep0name
[] = "ep0";
127 static const char *const ep_name
[] = {
128 ep0name
, /* everyone has ep0 */
130 /* act like a net2280: high speed, six configurable endpoints */
131 "ep-a", "ep-b", "ep-c", "ep-d", "ep-e", "ep-f",
133 /* or like pxa250: fifteen fixed function endpoints */
134 "ep1in-bulk", "ep2out-bulk", "ep3in-iso", "ep4out-iso", "ep5in-int",
135 "ep6in-bulk", "ep7out-bulk", "ep8in-iso", "ep9out-iso", "ep10in-int",
136 "ep11in-bulk", "ep12out-bulk", "ep13in-iso", "ep14out-iso",
139 /* or like sa1100: two fixed function endpoints */
140 "ep1out-bulk", "ep2in-bulk",
142 #define DUMMY_ENDPOINTS (sizeof(ep_name)/sizeof(char *))
144 /*-------------------------------------------------------------------------*/
150 struct list_head urbp_list
;
157 * SLAVE/GADGET side support
159 struct dummy_ep ep
[DUMMY_ENDPOINTS
];
161 struct usb_gadget gadget
;
162 struct usb_gadget_driver
*driver
;
163 struct dummy_request fifo_req
;
164 u8 fifo_buf
[FIFO_SIZE
];
168 unsigned old_active
:1;
171 * MASTER/HOST side support
173 struct timer_list timer
;
177 unsigned long re_timeout
;
179 struct usb_device
*udev
;
180 struct list_head urbp_list
;
183 static inline struct dummy
*hcd_to_dummy (struct usb_hcd
*hcd
)
185 return (struct dummy
*) (hcd
->hcd_priv
);
188 static inline struct usb_hcd
*dummy_to_hcd (struct dummy
*dum
)
190 return container_of((void *) dum
, struct usb_hcd
, hcd_priv
);
193 static inline struct device
*dummy_dev (struct dummy
*dum
)
195 return dummy_to_hcd(dum
)->self
.controller
;
198 static inline struct device
*udc_dev (struct dummy
*dum
)
200 return dum
->gadget
.dev
.parent
;
203 static inline struct dummy
*ep_to_dummy (struct dummy_ep
*ep
)
205 return container_of (ep
->gadget
, struct dummy
, gadget
);
208 static inline struct dummy
*gadget_to_dummy (struct usb_gadget
*gadget
)
210 return container_of (gadget
, struct dummy
, gadget
);
213 static inline struct dummy
*gadget_dev_to_dummy (struct device
*dev
)
215 return container_of (dev
, struct dummy
, gadget
.dev
);
218 static struct dummy
*the_controller
;
220 /*-------------------------------------------------------------------------*/
222 /* SLAVE/GADGET SIDE UTILITY ROUTINES */
224 /* called with spinlock held */
225 static void nuke (struct dummy
*dum
, struct dummy_ep
*ep
)
227 while (!list_empty (&ep
->queue
)) {
228 struct dummy_request
*req
;
230 req
= list_entry (ep
->queue
.next
, struct dummy_request
, queue
);
231 list_del_init (&req
->queue
);
232 req
->req
.status
= -ESHUTDOWN
;
234 spin_unlock (&dum
->lock
);
235 req
->req
.complete (&ep
->ep
, &req
->req
);
236 spin_lock (&dum
->lock
);
240 /* caller must hold lock */
242 stop_activity (struct dummy
*dum
)
246 /* prevent any more requests */
249 /* The timer is left running so that outstanding URBs can fail */
251 /* nuke any pending requests first, so driver i/o is quiesced */
252 list_for_each_entry (ep
, &dum
->gadget
.ep_list
, ep
.ep_list
)
255 /* driver now does any non-usb quiescing necessary */
258 /* caller must hold lock */
260 set_link_state (struct dummy
*dum
)
263 if ((dum
->port_status
& USB_PORT_STAT_POWER
) == 0)
264 dum
->port_status
= 0;
265 else if (!dum
->pullup
) {
266 dum
->port_status
&= ~(USB_PORT_STAT_CONNECTION
|
267 USB_PORT_STAT_ENABLE
|
268 USB_PORT_STAT_LOW_SPEED
|
269 USB_PORT_STAT_HIGH_SPEED
|
270 USB_PORT_STAT_SUSPEND
);
271 if ((dum
->old_status
& USB_PORT_STAT_CONNECTION
) != 0)
272 dum
->port_status
|= (USB_PORT_STAT_C_CONNECTION
<< 16);
274 dum
->port_status
|= USB_PORT_STAT_CONNECTION
;
275 if ((dum
->old_status
& USB_PORT_STAT_CONNECTION
) == 0)
276 dum
->port_status
|= (USB_PORT_STAT_C_CONNECTION
<< 16);
277 if ((dum
->port_status
& USB_PORT_STAT_ENABLE
) == 0)
278 dum
->port_status
&= ~USB_PORT_STAT_SUSPEND
;
279 else if ((dum
->port_status
& USB_PORT_STAT_SUSPEND
) == 0)
283 if ((dum
->port_status
& USB_PORT_STAT_ENABLE
) == 0 || dum
->active
)
286 if ((dum
->port_status
& USB_PORT_STAT_CONNECTION
) == 0 ||
287 (dum
->port_status
& USB_PORT_STAT_RESET
) != 0) {
288 if ((dum
->old_status
& USB_PORT_STAT_CONNECTION
) != 0 &&
289 (dum
->old_status
& USB_PORT_STAT_RESET
) == 0 &&
292 spin_unlock (&dum
->lock
);
293 dum
->driver
->disconnect (&dum
->gadget
);
294 spin_lock (&dum
->lock
);
296 } else if (dum
->active
!= dum
->old_active
) {
297 if (dum
->old_active
&& dum
->driver
->suspend
) {
298 spin_unlock (&dum
->lock
);
299 dum
->driver
->suspend (&dum
->gadget
);
300 spin_lock (&dum
->lock
);
301 } else if (!dum
->old_active
&& dum
->driver
->resume
) {
302 spin_unlock (&dum
->lock
);
303 dum
->driver
->resume (&dum
->gadget
);
304 spin_lock (&dum
->lock
);
308 dum
->old_status
= dum
->port_status
;
309 dum
->old_active
= dum
->active
;
312 /*-------------------------------------------------------------------------*/
314 /* SLAVE/GADGET SIDE DRIVER
316 * This only tracks gadget state. All the work is done when the host
317 * side tries some (emulated) i/o operation. Real device controller
318 * drivers would do real i/o using dma, fifos, irqs, timers, etc.
321 #define is_enabled(dum) \
322 (dum->port_status & USB_PORT_STAT_ENABLE)
325 dummy_enable (struct usb_ep
*_ep
, const struct usb_endpoint_descriptor
*desc
)
332 ep
= usb_ep_to_dummy_ep (_ep
);
333 if (!_ep
|| !desc
|| ep
->desc
|| _ep
->name
== ep0name
334 || desc
->bDescriptorType
!= USB_DT_ENDPOINT
)
336 dum
= ep_to_dummy (ep
);
337 if (!dum
->driver
|| !is_enabled (dum
))
339 max
= le16_to_cpu(desc
->wMaxPacketSize
) & 0x3ff;
341 /* drivers must not request bad settings, since lower levels
342 * (hardware or its drivers) may not check. some endpoints
343 * can't do iso, many have maxpacket limitations, etc.
345 * since this "hardware" driver is here to help debugging, we
346 * have some extra sanity checks. (there could be more though,
347 * especially for "ep9out" style fixed function ones.)
350 switch (desc
->bmAttributes
& 0x03) {
351 case USB_ENDPOINT_XFER_BULK
:
352 if (strstr (ep
->ep
.name
, "-iso")
353 || strstr (ep
->ep
.name
, "-int")) {
356 switch (dum
->gadget
.speed
) {
360 /* conserve return statements */
363 case 8: case 16: case 32: case 64:
364 /* we'll fake any legal size */
372 case USB_ENDPOINT_XFER_INT
:
373 if (strstr (ep
->ep
.name
, "-iso")) /* bulk is ok */
375 /* real hardware might not handle all packet sizes */
376 switch (dum
->gadget
.speed
) {
380 /* save a return statement */
384 /* save a return statement */
391 case USB_ENDPOINT_XFER_ISOC
:
392 if (strstr (ep
->ep
.name
, "-bulk")
393 || strstr (ep
->ep
.name
, "-int"))
395 /* real hardware might not handle all packet sizes */
396 switch (dum
->gadget
.speed
) {
400 /* save a return statement */
404 /* save a return statement */
410 /* few chips support control except on ep0 */
414 _ep
->maxpacket
= max
;
417 dev_dbg (udc_dev(dum
), "enabled %s (ep%d%s-%s) maxpacket %d\n",
419 desc
->bEndpointAddress
& 0x0f,
420 (desc
->bEndpointAddress
& USB_DIR_IN
) ? "in" : "out",
422 switch (desc
->bmAttributes
& 0x03) {
423 case USB_ENDPOINT_XFER_BULK
: val
= "bulk"; break;
424 case USB_ENDPOINT_XFER_ISOC
: val
= "iso"; break;
425 case USB_ENDPOINT_XFER_INT
: val
= "intr"; break;
426 default: val
= "ctrl"; break;
430 /* at this point real hardware should be NAKing transfers
431 * to that endpoint, until a buffer is queued to it.
438 static int dummy_disable (struct usb_ep
*_ep
)
445 ep
= usb_ep_to_dummy_ep (_ep
);
446 if (!_ep
|| !ep
->desc
|| _ep
->name
== ep0name
)
448 dum
= ep_to_dummy (ep
);
450 spin_lock_irqsave (&dum
->lock
, flags
);
454 spin_unlock_irqrestore (&dum
->lock
, flags
);
456 dev_dbg (udc_dev(dum
), "disabled %s\n", _ep
->name
);
460 static struct usb_request
*
461 dummy_alloc_request (struct usb_ep
*_ep
, int mem_flags
)
464 struct dummy_request
*req
;
468 ep
= usb_ep_to_dummy_ep (_ep
);
470 req
= kmalloc (sizeof *req
, mem_flags
);
473 memset (req
, 0, sizeof *req
);
474 INIT_LIST_HEAD (&req
->queue
);
479 dummy_free_request (struct usb_ep
*_ep
, struct usb_request
*_req
)
482 struct dummy_request
*req
;
484 ep
= usb_ep_to_dummy_ep (_ep
);
485 if (!ep
|| !_req
|| (!ep
->desc
&& _ep
->name
!= ep0name
))
488 req
= usb_request_to_dummy_request (_req
);
489 WARN_ON (!list_empty (&req
->queue
));
504 ep
= usb_ep_to_dummy_ep (_ep
);
505 dum
= ep_to_dummy (ep
);
509 retval
= kmalloc (bytes
, mem_flags
);
510 *dma
= (dma_addr_t
) retval
;
526 fifo_complete (struct usb_ep
*ep
, struct usb_request
*req
)
531 dummy_queue (struct usb_ep
*_ep
, struct usb_request
*_req
, int mem_flags
)
534 struct dummy_request
*req
;
538 req
= usb_request_to_dummy_request (_req
);
539 if (!_req
|| !list_empty (&req
->queue
) || !_req
->complete
)
542 ep
= usb_ep_to_dummy_ep (_ep
);
543 if (!_ep
|| (!ep
->desc
&& _ep
->name
!= ep0name
))
546 dum
= ep_to_dummy (ep
);
547 if (!dum
->driver
|| !is_enabled (dum
))
551 dev_dbg (udc_dev(dum
), "ep %p queue req %p to %s, len %d buf %p\n",
552 ep
, _req
, _ep
->name
, _req
->length
, _req
->buf
);
555 _req
->status
= -EINPROGRESS
;
557 spin_lock_irqsave (&dum
->lock
, flags
);
559 /* implement an emulated single-request FIFO */
560 if (ep
->desc
&& (ep
->desc
->bEndpointAddress
& USB_DIR_IN
) &&
561 list_empty (&dum
->fifo_req
.queue
) &&
562 list_empty (&ep
->queue
) &&
563 _req
->length
<= FIFO_SIZE
) {
564 req
= &dum
->fifo_req
;
566 req
->req
.buf
= dum
->fifo_buf
;
567 memcpy (dum
->fifo_buf
, _req
->buf
, _req
->length
);
568 req
->req
.context
= dum
;
569 req
->req
.complete
= fifo_complete
;
571 spin_unlock (&dum
->lock
);
572 _req
->actual
= _req
->length
;
574 _req
->complete (_ep
, _req
);
575 spin_lock (&dum
->lock
);
577 list_add_tail (&req
->queue
, &ep
->queue
);
578 spin_unlock_irqrestore (&dum
->lock
, flags
);
580 /* real hardware would likely enable transfers here, in case
581 * it'd been left NAKing.
586 static int dummy_dequeue (struct usb_ep
*_ep
, struct usb_request
*_req
)
590 int retval
= -EINVAL
;
592 struct dummy_request
*req
= NULL
;
596 ep
= usb_ep_to_dummy_ep (_ep
);
597 dum
= ep_to_dummy (ep
);
602 spin_lock_irqsave (&dum
->lock
, flags
);
603 list_for_each_entry (req
, &ep
->queue
, queue
) {
604 if (&req
->req
== _req
) {
605 list_del_init (&req
->queue
);
606 _req
->status
= -ECONNRESET
;
611 spin_unlock_irqrestore (&dum
->lock
, flags
);
614 dev_dbg (udc_dev(dum
),
615 "dequeued req %p from %s, len %d buf %p\n",
616 req
, _ep
->name
, _req
->length
, _req
->buf
);
617 _req
->complete (_ep
, _req
);
623 dummy_set_halt (struct usb_ep
*_ep
, int value
)
630 ep
= usb_ep_to_dummy_ep (_ep
);
631 dum
= ep_to_dummy (ep
);
636 else if (ep
->desc
&& (ep
->desc
->bEndpointAddress
& USB_DIR_IN
) &&
637 !list_empty (&ep
->queue
))
641 /* FIXME clear emulated data toggle too */
645 static const struct usb_ep_ops dummy_ep_ops
= {
646 .enable
= dummy_enable
,
647 .disable
= dummy_disable
,
649 .alloc_request
= dummy_alloc_request
,
650 .free_request
= dummy_free_request
,
652 .alloc_buffer
= dummy_alloc_buffer
,
653 .free_buffer
= dummy_free_buffer
,
654 /* map, unmap, ... eventually hook the "generic" dma calls */
656 .queue
= dummy_queue
,
657 .dequeue
= dummy_dequeue
,
659 .set_halt
= dummy_set_halt
,
662 /*-------------------------------------------------------------------------*/
664 /* there are both host and device side versions of this call ... */
665 static int dummy_g_get_frame (struct usb_gadget
*_gadget
)
669 do_gettimeofday (&tv
);
670 return tv
.tv_usec
/ 1000;
673 static int dummy_wakeup (struct usb_gadget
*_gadget
)
677 dum
= gadget_to_dummy (_gadget
);
678 if (!(dum
->port_status
& USB_PORT_STAT_SUSPEND
)
679 || !(dum
->devstatus
&
680 ( (1 << USB_DEVICE_B_HNP_ENABLE
)
681 | (1 << USB_DEVICE_REMOTE_WAKEUP
))))
684 /* hub notices our request, issues downstream resume, etc */
686 dum
->re_timeout
= jiffies
+ msecs_to_jiffies(20);
687 mod_timer (&dummy_to_hcd (dum
)->rh_timer
, dum
->re_timeout
);
691 static int dummy_set_selfpowered (struct usb_gadget
*_gadget
, int value
)
695 dum
= gadget_to_dummy (_gadget
);
697 dum
->devstatus
|= (1 << USB_DEVICE_SELF_POWERED
);
699 dum
->devstatus
&= ~(1 << USB_DEVICE_SELF_POWERED
);
703 static int dummy_pullup (struct usb_gadget
*_gadget
, int value
)
708 dum
= gadget_to_dummy (_gadget
);
709 spin_lock_irqsave (&dum
->lock
, flags
);
710 dum
->pullup
= (value
!= 0);
711 set_link_state (dum
);
712 spin_unlock_irqrestore (&dum
->lock
, flags
);
714 usb_hcd_poll_rh_status (dummy_to_hcd (dum
));
718 static const struct usb_gadget_ops dummy_ops
= {
719 .get_frame
= dummy_g_get_frame
,
720 .wakeup
= dummy_wakeup
,
721 .set_selfpowered
= dummy_set_selfpowered
,
722 .pullup
= dummy_pullup
,
725 /*-------------------------------------------------------------------------*/
727 /* "function" sysfs attribute */
729 show_function (struct device
*dev
, struct device_attribute
*attr
, char *buf
)
731 struct dummy
*dum
= gadget_dev_to_dummy (dev
);
733 if (!dum
->driver
|| !dum
->driver
->function
)
735 return scnprintf (buf
, PAGE_SIZE
, "%s\n", dum
->driver
->function
);
737 DEVICE_ATTR (function
, S_IRUGO
, show_function
, NULL
);
739 /*-------------------------------------------------------------------------*/
742 * Driver registration/unregistration.
744 * This is basically hardware-specific; there's usually only one real USB
745 * device (not host) controller since that's how USB devices are intended
746 * to work. So most implementations of these api calls will rely on the
747 * fact that only one driver will ever bind to the hardware. But curious
748 * hardware can be built with discrete components, so the gadget API doesn't
749 * require that assumption.
751 * For this emulator, it might be convenient to create a usb slave device
752 * for each driver that registers: just add to a big root hub.
756 usb_gadget_register_driver (struct usb_gadget_driver
*driver
)
758 struct dummy
*dum
= the_controller
;
765 if (!driver
->bind
|| !driver
->unbind
|| !driver
->setup
766 || driver
->speed
== USB_SPEED_UNKNOWN
)
770 * SLAVE side init ... the layer above hardware, which
771 * can't enumerate without help from the driver we're binding.
776 INIT_LIST_HEAD (&dum
->gadget
.ep_list
);
777 for (i
= 0; i
< DUMMY_ENDPOINTS
; i
++) {
778 struct dummy_ep
*ep
= &dum
->ep
[i
];
782 ep
->ep
.name
= ep_name
[i
];
783 ep
->ep
.ops
= &dummy_ep_ops
;
784 list_add_tail (&ep
->ep
.ep_list
, &dum
->gadget
.ep_list
);
785 ep
->halted
= ep
->already_seen
= ep
->setup_stage
= 0;
786 ep
->ep
.maxpacket
= ~0;
787 ep
->last_io
= jiffies
;
788 ep
->gadget
= &dum
->gadget
;
790 INIT_LIST_HEAD (&ep
->queue
);
793 dum
->gadget
.ep0
= &dum
->ep
[0].ep
;
794 dum
->ep
[0].ep
.maxpacket
= 64;
795 list_del_init (&dum
->ep
[0].ep
.ep_list
);
796 INIT_LIST_HEAD(&dum
->fifo_req
.queue
);
798 dum
->driver
= driver
;
799 dum
->gadget
.dev
.driver
= &driver
->driver
;
800 dev_dbg (udc_dev(dum
), "binding gadget driver '%s'\n",
801 driver
->driver
.name
);
802 if ((retval
= driver
->bind (&dum
->gadget
)) != 0) {
804 dum
->gadget
.dev
.driver
= NULL
;
808 driver
->driver
.bus
= dum
->gadget
.dev
.parent
->bus
;
809 driver_register (&driver
->driver
);
810 device_bind_driver (&dum
->gadget
.dev
);
812 /* khubd will enumerate this in a while */
813 spin_lock_irq (&dum
->lock
);
815 set_link_state (dum
);
816 spin_unlock_irq (&dum
->lock
);
818 usb_hcd_poll_rh_status (dummy_to_hcd (dum
));
821 EXPORT_SYMBOL (usb_gadget_register_driver
);
824 usb_gadget_unregister_driver (struct usb_gadget_driver
*driver
)
826 struct dummy
*dum
= the_controller
;
831 if (!driver
|| driver
!= dum
->driver
)
834 dev_dbg (udc_dev(dum
), "unregister gadget driver '%s'\n",
835 driver
->driver
.name
);
837 spin_lock_irqsave (&dum
->lock
, flags
);
839 set_link_state (dum
);
840 spin_unlock_irqrestore (&dum
->lock
, flags
);
842 driver
->unbind (&dum
->gadget
);
845 device_release_driver (&dum
->gadget
.dev
);
846 driver_unregister (&driver
->driver
);
848 spin_lock_irqsave (&dum
->lock
, flags
);
850 set_link_state (dum
);
851 spin_unlock_irqrestore (&dum
->lock
, flags
);
853 usb_hcd_poll_rh_status (dummy_to_hcd (dum
));
856 EXPORT_SYMBOL (usb_gadget_unregister_driver
);
860 int net2280_set_fifo_mode (struct usb_gadget
*gadget
, int mode
)
864 EXPORT_SYMBOL (net2280_set_fifo_mode
);
867 /* The gadget structure is stored inside the hcd structure and will be
868 * released along with it. */
870 dummy_gadget_release (struct device
*dev
)
872 #if 0 /* usb_bus_put isn't EXPORTed! */
873 struct dummy
*dum
= gadget_dev_to_dummy (dev
);
875 usb_bus_put (&dummy_to_hcd (dum
)->self
);
879 static int dummy_udc_probe (struct device
*dev
)
881 struct dummy
*dum
= the_controller
;
884 dum
->gadget
.name
= gadget_name
;
885 dum
->gadget
.ops
= &dummy_ops
;
886 dum
->gadget
.is_dualspeed
= 1;
888 /* maybe claim OTG support, though we won't complete HNP */
889 dum
->gadget
.is_otg
= (dummy_to_hcd(dum
)->self
.otg_port
!= 0);
891 strcpy (dum
->gadget
.dev
.bus_id
, "gadget");
892 dum
->gadget
.dev
.parent
= dev
;
893 dum
->gadget
.dev
.release
= dummy_gadget_release
;
894 rc
= device_register (&dum
->gadget
.dev
);
898 #if 0 /* usb_bus_get isn't EXPORTed! */
899 usb_bus_get (&dummy_to_hcd (dum
)->self
);
902 dev_set_drvdata (dev
, dum
);
903 device_create_file (&dum
->gadget
.dev
, &dev_attr_function
);
907 static int dummy_udc_remove (struct device
*dev
)
909 struct dummy
*dum
= dev_get_drvdata (dev
);
911 dev_set_drvdata (dev
, NULL
);
912 device_remove_file (&dum
->gadget
.dev
, &dev_attr_function
);
913 device_unregister (&dum
->gadget
.dev
);
917 static struct device_driver dummy_udc_driver
= {
918 .name
= (char *) gadget_name
,
919 .bus
= &platform_bus_type
,
920 .probe
= dummy_udc_probe
,
921 .remove
= dummy_udc_remove
,
924 /*-------------------------------------------------------------------------*/
926 /* MASTER/HOST SIDE DRIVER
928 * this uses the hcd framework to hook up to host side drivers.
929 * its root hub will only have one device, otherwise it acts like
930 * a normal host controller.
932 * when urbs are queued, they're just stuck on a list that we
933 * scan in a timer callback. that callback connects writes from
934 * the host with reads from the device, and so on, based on the
938 static int dummy_urb_enqueue (
940 struct usb_host_endpoint
*ep
,
948 if (!urb
->transfer_buffer
&& urb
->transfer_buffer_length
)
951 urbp
= kmalloc (sizeof *urbp
, mem_flags
);
956 dum
= hcd_to_dummy (hcd
);
957 spin_lock_irqsave (&dum
->lock
, flags
);
960 dum
->udev
= urb
->dev
;
961 usb_get_dev (dum
->udev
);
962 } else if (unlikely (dum
->udev
!= urb
->dev
))
963 dev_err (dummy_dev(dum
), "usb_device address has changed!\n");
965 list_add_tail (&urbp
->urbp_list
, &dum
->urbp_list
);
967 if (usb_pipetype (urb
->pipe
) == PIPE_CONTROL
)
968 urb
->error_count
= 1; /* mark as a new urb */
970 /* kick the scheduler, it'll do the rest */
971 if (!timer_pending (&dum
->timer
))
972 mod_timer (&dum
->timer
, jiffies
+ 1);
974 spin_unlock_irqrestore (&dum
->lock
, flags
);
978 static int dummy_urb_dequeue (struct usb_hcd
*hcd
, struct urb
*urb
)
980 /* giveback happens automatically in timer callback */
984 static void maybe_set_status (struct urb
*urb
, int status
)
986 spin_lock (&urb
->lock
);
987 if (urb
->status
== -EINPROGRESS
)
988 urb
->status
= status
;
989 spin_unlock (&urb
->lock
);
992 /* transfer up to a frame's worth; caller must own lock */
994 transfer (struct dummy
*dum
, struct urb
*urb
, struct dummy_ep
*ep
, int limit
)
996 struct dummy_request
*req
;
999 /* if there's no request queued, the device is NAKing; return */
1000 list_for_each_entry (req
, &ep
->queue
, queue
) {
1001 unsigned host_len
, dev_len
, len
;
1002 int is_short
, to_host
;
1005 /* 1..N packets of ep->ep.maxpacket each ... the last one
1006 * may be short (including zero length).
1008 * writer can send a zlp explicitly (length 0) or implicitly
1009 * (length mod maxpacket zero, and 'zero' flag); they always
1012 host_len
= urb
->transfer_buffer_length
- urb
->actual_length
;
1013 dev_len
= req
->req
.length
- req
->req
.actual
;
1014 len
= min (host_len
, dev_len
);
1016 /* FIXME update emulated data toggle too */
1018 to_host
= usb_pipein (urb
->pipe
);
1019 if (unlikely (len
== 0))
1024 /* not enough bandwidth left? */
1025 if (limit
< ep
->ep
.maxpacket
&& limit
< len
)
1027 len
= min (len
, (unsigned) limit
);
1031 /* use an extra pass for the final short packet */
1032 if (len
> ep
->ep
.maxpacket
) {
1034 len
-= (len
% ep
->ep
.maxpacket
);
1036 is_short
= (len
% ep
->ep
.maxpacket
) != 0;
1038 /* else transfer packet(s) */
1039 ubuf
= urb
->transfer_buffer
+ urb
->actual_length
;
1040 rbuf
= req
->req
.buf
+ req
->req
.actual
;
1042 memcpy (ubuf
, rbuf
, len
);
1044 memcpy (rbuf
, ubuf
, len
);
1045 ep
->last_io
= jiffies
;
1048 urb
->actual_length
+= len
;
1049 req
->req
.actual
+= len
;
1052 /* short packets terminate, maybe with overflow/underflow.
1053 * it's only really an error to write too much.
1055 * partially filling a buffer optionally blocks queue advances
1056 * (so completion handlers can clean up the queue) but we don't
1057 * need to emulate such data-in-flight. so we only show part
1058 * of the URB_SHORT_NOT_OK effect: completion status.
1061 if (host_len
== dev_len
) {
1062 req
->req
.status
= 0;
1063 maybe_set_status (urb
, 0);
1064 } else if (to_host
) {
1065 req
->req
.status
= 0;
1066 if (dev_len
> host_len
)
1067 maybe_set_status (urb
, -EOVERFLOW
);
1069 maybe_set_status (urb
,
1070 (urb
->transfer_flags
1073 } else if (!to_host
) {
1074 maybe_set_status (urb
, 0);
1075 if (host_len
> dev_len
)
1076 req
->req
.status
= -EOVERFLOW
;
1078 req
->req
.status
= 0;
1081 /* many requests terminate without a short packet */
1083 if (req
->req
.length
== req
->req
.actual
1085 req
->req
.status
= 0;
1086 if (urb
->transfer_buffer_length
== urb
->actual_length
1087 && !(urb
->transfer_flags
1088 & URB_ZERO_PACKET
)) {
1089 maybe_set_status (urb
, 0);
1093 /* device side completion --> continuable */
1094 if (req
->req
.status
!= -EINPROGRESS
) {
1095 list_del_init (&req
->queue
);
1097 spin_unlock (&dum
->lock
);
1098 req
->req
.complete (&ep
->ep
, &req
->req
);
1099 spin_lock (&dum
->lock
);
1101 /* requests might have been unlinked... */
1105 /* host side completion --> terminate */
1106 if (urb
->status
!= -EINPROGRESS
)
1109 /* rescan to continue with any other queued i/o */
1116 static int periodic_bytes (struct dummy
*dum
, struct dummy_ep
*ep
)
1118 int limit
= ep
->ep
.maxpacket
;
1120 if (dum
->gadget
.speed
== USB_SPEED_HIGH
) {
1123 /* high bandwidth mode */
1124 tmp
= le16_to_cpu(ep
->desc
->wMaxPacketSize
);
1125 tmp
= le16_to_cpu (tmp
);
1126 tmp
= (tmp
>> 11) & 0x03;
1127 tmp
*= 8 /* applies to entire frame */;
1128 limit
+= limit
* tmp
;
1133 #define is_active(dum) ((dum->port_status & \
1134 (USB_PORT_STAT_CONNECTION | USB_PORT_STAT_ENABLE | \
1135 USB_PORT_STAT_SUSPEND)) \
1136 == (USB_PORT_STAT_CONNECTION | USB_PORT_STAT_ENABLE))
1138 static struct dummy_ep
*find_endpoint (struct dummy
*dum
, u8 address
)
1142 if (!is_active (dum
))
1144 if ((address
& ~USB_DIR_IN
) == 0)
1145 return &dum
->ep
[0];
1146 for (i
= 1; i
< DUMMY_ENDPOINTS
; i
++) {
1147 struct dummy_ep
*ep
= &dum
->ep
[i
];
1151 if (ep
->desc
->bEndpointAddress
== address
)
1159 #define Dev_Request (USB_TYPE_STANDARD | USB_RECIP_DEVICE)
1160 #define Dev_InRequest (Dev_Request | USB_DIR_IN)
1161 #define Intf_Request (USB_TYPE_STANDARD | USB_RECIP_INTERFACE)
1162 #define Intf_InRequest (Intf_Request | USB_DIR_IN)
1163 #define Ep_Request (USB_TYPE_STANDARD | USB_RECIP_ENDPOINT)
1164 #define Ep_InRequest (Ep_Request | USB_DIR_IN)
1166 /* drive both sides of the transfers; looks like irq handlers to
1167 * both drivers except the callbacks aren't in_irq().
1169 static void dummy_timer (unsigned long _dum
)
1171 struct dummy
*dum
= (struct dummy
*) _dum
;
1172 struct urbp
*urbp
, *tmp
;
1173 unsigned long flags
;
1177 /* simplistic model for one frame's bandwidth */
1178 switch (dum
->gadget
.speed
) {
1180 total
= 8/*bytes*/ * 12/*packets*/;
1182 case USB_SPEED_FULL
:
1183 total
= 64/*bytes*/ * 19/*packets*/;
1185 case USB_SPEED_HIGH
:
1186 total
= 512/*bytes*/ * 13/*packets*/ * 8/*uframes*/;
1189 dev_err (dummy_dev(dum
), "bogus device speed\n");
1193 /* FIXME if HZ != 1000 this will probably misbehave ... */
1195 /* look at each urb queued by the host side driver */
1196 spin_lock_irqsave (&dum
->lock
, flags
);
1199 dev_err (dummy_dev(dum
),
1200 "timer fired with no URBs pending?\n");
1201 spin_unlock_irqrestore (&dum
->lock
, flags
);
1205 for (i
= 0; i
< DUMMY_ENDPOINTS
; i
++) {
1208 dum
->ep
[i
].already_seen
= 0;
1212 list_for_each_entry_safe (urbp
, tmp
, &dum
->urbp_list
, urbp_list
) {
1214 struct dummy_request
*req
;
1216 struct dummy_ep
*ep
= NULL
;
1220 if (urb
->status
!= -EINPROGRESS
) {
1221 /* likely it was just unlinked */
1224 type
= usb_pipetype (urb
->pipe
);
1226 /* used up this frame's non-periodic bandwidth?
1227 * FIXME there's infinite bandwidth for control and
1228 * periodic transfers ... unrealistic.
1230 if (total
<= 0 && type
== PIPE_BULK
)
1233 /* find the gadget's ep for this request (if configured) */
1234 address
= usb_pipeendpoint (urb
->pipe
);
1235 if (usb_pipein (urb
->pipe
))
1236 address
|= USB_DIR_IN
;
1237 ep
= find_endpoint(dum
, address
);
1239 /* set_configuration() disagreement */
1240 dev_dbg (dummy_dev(dum
),
1241 "no ep configured for urb %p\n",
1243 maybe_set_status (urb
, -EPROTO
);
1247 if (ep
->already_seen
)
1249 ep
->already_seen
= 1;
1250 if (ep
== &dum
->ep
[0] && urb
->error_count
) {
1251 ep
->setup_stage
= 1; /* a new urb */
1252 urb
->error_count
= 0;
1254 if (ep
->halted
&& !ep
->setup_stage
) {
1255 /* NOTE: must not be iso! */
1256 dev_dbg (dummy_dev(dum
), "ep %s halted, urb %p\n",
1258 maybe_set_status (urb
, -EPIPE
);
1261 /* FIXME make sure both ends agree on maxpacket */
1263 /* handle control requests */
1264 if (ep
== &dum
->ep
[0] && ep
->setup_stage
) {
1265 struct usb_ctrlrequest setup
;
1267 struct dummy_ep
*ep2
;
1269 setup
= *(struct usb_ctrlrequest
*) urb
->setup_packet
;
1270 if (setup
.wLength
!= urb
->transfer_buffer_length
) {
1271 maybe_set_status (urb
, -EOVERFLOW
);
1275 /* paranoia, in case of stale queued data */
1276 list_for_each_entry (req
, &ep
->queue
, queue
) {
1277 list_del_init (&req
->queue
);
1278 req
->req
.status
= -EOVERFLOW
;
1279 dev_dbg (udc_dev(dum
), "stale req = %p\n",
1282 spin_unlock (&dum
->lock
);
1283 req
->req
.complete (&ep
->ep
, &req
->req
);
1284 spin_lock (&dum
->lock
);
1285 ep
->already_seen
= 0;
1289 /* gadget driver never sees set_address or operations
1290 * on standard feature flags. some hardware doesn't
1293 ep
->last_io
= jiffies
;
1294 ep
->setup_stage
= 0;
1296 switch (setup
.bRequest
) {
1297 case USB_REQ_SET_ADDRESS
:
1298 if (setup
.bRequestType
!= Dev_Request
)
1300 dum
->address
= setup
.wValue
;
1301 maybe_set_status (urb
, 0);
1302 dev_dbg (udc_dev(dum
), "set_address = %d\n",
1306 case USB_REQ_SET_FEATURE
:
1307 if (setup
.bRequestType
== Dev_Request
) {
1309 switch (setup
.wValue
) {
1310 case USB_DEVICE_REMOTE_WAKEUP
:
1312 case USB_DEVICE_B_HNP_ENABLE
:
1313 dum
->gadget
.b_hnp_enable
= 1;
1315 case USB_DEVICE_A_HNP_SUPPORT
:
1316 dum
->gadget
.a_hnp_support
= 1;
1318 case USB_DEVICE_A_ALT_HNP_SUPPORT
:
1319 dum
->gadget
.a_alt_hnp_support
1323 value
= -EOPNOTSUPP
;
1327 (1 << setup
.wValue
);
1328 maybe_set_status (urb
, 0);
1331 } else if (setup
.bRequestType
== Ep_Request
) {
1333 ep2
= find_endpoint (dum
,
1336 value
= -EOPNOTSUPP
;
1341 maybe_set_status (urb
, 0);
1344 case USB_REQ_CLEAR_FEATURE
:
1345 if (setup
.bRequestType
== Dev_Request
) {
1346 switch (setup
.wValue
) {
1347 case USB_DEVICE_REMOTE_WAKEUP
:
1348 dum
->devstatus
&= ~(1 <<
1349 USB_DEVICE_REMOTE_WAKEUP
);
1351 maybe_set_status (urb
, 0);
1354 value
= -EOPNOTSUPP
;
1357 } else if (setup
.bRequestType
== Ep_Request
) {
1359 ep2
= find_endpoint (dum
,
1362 value
= -EOPNOTSUPP
;
1367 maybe_set_status (urb
, 0);
1370 case USB_REQ_GET_STATUS
:
1371 if (setup
.bRequestType
== Dev_InRequest
1372 || setup
.bRequestType
1374 || setup
.bRequestType
1379 // device: remote wakeup, selfpowered
1380 // interface: nothing
1382 buf
= (char *)urb
->transfer_buffer
;
1383 if (urb
->transfer_buffer_length
> 0) {
1384 if (setup
.bRequestType
==
1386 ep2
= find_endpoint (dum
, setup
.wIndex
);
1388 value
= -EOPNOTSUPP
;
1391 buf
[0] = ep2
->halted
;
1392 } else if (setup
.bRequestType
==
1399 if (urb
->transfer_buffer_length
> 1)
1401 urb
->actual_length
= min (2,
1402 urb
->transfer_buffer_length
);
1404 maybe_set_status (urb
, 0);
1409 /* gadget driver handles all other requests. block
1410 * until setup() returns; no reentrancy issues etc.
1413 spin_unlock (&dum
->lock
);
1414 value
= dum
->driver
->setup (&dum
->gadget
,
1416 spin_lock (&dum
->lock
);
1419 /* no delays (max 64KB data stage) */
1421 goto treat_control_like_bulk
;
1423 /* error, see below */
1427 if (value
!= -EOPNOTSUPP
)
1428 dev_dbg (udc_dev(dum
),
1431 maybe_set_status (urb
, -EPIPE
);
1432 urb
->actual_length
= 0;
1438 /* non-control requests */
1440 switch (usb_pipetype (urb
->pipe
)) {
1441 case PIPE_ISOCHRONOUS
:
1442 /* FIXME is it urb->interval since the last xfer?
1443 * use urb->iso_frame_desc[i].
1444 * complete whether or not ep has requests queued.
1445 * report random errors, to debug drivers.
1447 limit
= max (limit
, periodic_bytes (dum
, ep
));
1448 maybe_set_status (urb
, -ENOSYS
);
1451 case PIPE_INTERRUPT
:
1452 /* FIXME is it urb->interval since the last xfer?
1453 * this almost certainly polls too fast.
1455 limit
= max (limit
, periodic_bytes (dum
, ep
));
1458 // case PIPE_BULK: case PIPE_CONTROL:
1460 treat_control_like_bulk
:
1461 ep
->last_io
= jiffies
;
1462 total
= transfer (dum
, urb
, ep
, limit
);
1466 /* incomplete transfer? */
1467 if (urb
->status
== -EINPROGRESS
)
1472 list_del (&urbp
->urbp_list
);
1475 ep
->already_seen
= ep
->setup_stage
= 0;
1477 spin_unlock (&dum
->lock
);
1478 usb_hcd_giveback_urb (dummy_to_hcd(dum
), urb
, NULL
);
1479 spin_lock (&dum
->lock
);
1484 /* want a 1 msec delay here */
1485 if (!list_empty (&dum
->urbp_list
))
1486 mod_timer (&dum
->timer
, jiffies
+ msecs_to_jiffies(1));
1488 usb_put_dev (dum
->udev
);
1492 spin_unlock_irqrestore (&dum
->lock
, flags
);
1495 /*-------------------------------------------------------------------------*/
1497 #define PORT_C_MASK \
1498 ((USB_PORT_STAT_C_CONNECTION \
1499 | USB_PORT_STAT_C_ENABLE \
1500 | USB_PORT_STAT_C_SUSPEND \
1501 | USB_PORT_STAT_C_OVERCURRENT \
1502 | USB_PORT_STAT_C_RESET) << 16)
1504 static int dummy_hub_status (struct usb_hcd
*hcd
, char *buf
)
1507 unsigned long flags
;
1510 dum
= hcd_to_dummy (hcd
);
1512 spin_lock_irqsave (&dum
->lock
, flags
);
1514 if (dum
->resuming
&& time_after_eq (jiffies
, dum
->re_timeout
)) {
1515 dum
->port_status
|= (USB_PORT_STAT_C_SUSPEND
<< 16);
1516 dum
->port_status
&= ~USB_PORT_STAT_SUSPEND
;
1517 set_link_state (dum
);
1520 if (!(dum
->port_status
& PORT_C_MASK
))
1524 dev_dbg (dummy_dev(dum
), "port status 0x%08x has changes\n",
1528 spin_unlock_irqrestore (&dum
->lock
, flags
);
1533 hub_descriptor (struct usb_hub_descriptor
*desc
)
1535 memset (desc
, 0, sizeof *desc
);
1536 desc
->bDescriptorType
= 0x29;
1537 desc
->bDescLength
= 9;
1538 desc
->wHubCharacteristics
= __constant_cpu_to_le16 (0x0001);
1539 desc
->bNbrPorts
= 1;
1540 desc
->bitmap
[0] = 0xff;
1541 desc
->bitmap
[1] = 0xff;
1544 static int dummy_hub_control (
1545 struct usb_hcd
*hcd
,
1554 unsigned long flags
;
1556 dum
= hcd_to_dummy (hcd
);
1557 spin_lock_irqsave (&dum
->lock
, flags
);
1559 case ClearHubFeature
:
1561 case ClearPortFeature
:
1563 case USB_PORT_FEAT_SUSPEND
:
1564 if (dum
->port_status
& USB_PORT_STAT_SUSPEND
) {
1565 /* 20msec resume signaling */
1567 dum
->re_timeout
= jiffies
+
1568 msecs_to_jiffies(20);
1571 case USB_PORT_FEAT_POWER
:
1572 if (dum
->port_status
& USB_PORT_STAT_POWER
)
1573 dev_dbg (dummy_dev(dum
), "power-off\n");
1576 dum
->port_status
&= ~(1 << wValue
);
1577 set_link_state (dum
);
1580 case GetHubDescriptor
:
1581 hub_descriptor ((struct usb_hub_descriptor
*) buf
);
1584 *(u32
*) buf
= __constant_cpu_to_le32 (0);
1590 /* whoever resets or resumes must GetPortStatus to
1593 if (dum
->resuming
&&
1594 time_after_eq (jiffies
, dum
->re_timeout
)) {
1595 dum
->port_status
|= (USB_PORT_STAT_C_SUSPEND
<< 16);
1596 dum
->port_status
&= ~USB_PORT_STAT_SUSPEND
;
1598 if ((dum
->port_status
& USB_PORT_STAT_RESET
) != 0 &&
1599 time_after_eq (jiffies
, dum
->re_timeout
)) {
1600 dum
->port_status
|= (USB_PORT_STAT_C_RESET
<< 16);
1601 dum
->port_status
&= ~USB_PORT_STAT_RESET
;
1603 dum
->port_status
|= USB_PORT_STAT_ENABLE
;
1604 /* give it the best speed we agree on */
1605 dum
->gadget
.speed
= dum
->driver
->speed
;
1606 dum
->gadget
.ep0
->maxpacket
= 64;
1607 switch (dum
->gadget
.speed
) {
1608 case USB_SPEED_HIGH
:
1610 USB_PORT_STAT_HIGH_SPEED
;
1613 dum
->gadget
.ep0
->maxpacket
= 8;
1615 USB_PORT_STAT_LOW_SPEED
;
1618 dum
->gadget
.speed
= USB_SPEED_FULL
;
1623 set_link_state (dum
);
1624 ((u16
*) buf
)[0] = cpu_to_le16 (dum
->port_status
);
1625 ((u16
*) buf
)[1] = cpu_to_le16 (dum
->port_status
>> 16);
1630 case SetPortFeature
:
1632 case USB_PORT_FEAT_SUSPEND
:
1634 dum
->port_status
|= USB_PORT_STAT_SUSPEND
;
1636 /* HNP would happen here; for now we
1637 * assume b_bus_req is always true.
1639 set_link_state (dum
);
1640 if (((1 << USB_DEVICE_B_HNP_ENABLE
)
1641 & dum
->devstatus
) != 0)
1642 dev_dbg (dummy_dev(dum
),
1646 case USB_PORT_FEAT_POWER
:
1647 dum
->port_status
|= USB_PORT_STAT_POWER
;
1648 set_link_state (dum
);
1650 case USB_PORT_FEAT_RESET
:
1651 /* if it's already enabled, disable */
1652 dum
->port_status
&= ~(USB_PORT_STAT_ENABLE
1653 | USB_PORT_STAT_LOW_SPEED
1654 | USB_PORT_STAT_HIGH_SPEED
);
1655 /* 50msec reset signaling */
1656 dum
->re_timeout
= jiffies
+ msecs_to_jiffies(50);
1659 if ((dum
->port_status
& USB_PORT_STAT_POWER
) != 0) {
1660 dum
->port_status
|= (1 << wValue
);
1661 set_link_state (dum
);
1667 dev_dbg (dummy_dev(dum
),
1668 "hub control req%04x v%04x i%04x l%d\n",
1669 typeReq
, wValue
, wIndex
, wLength
);
1671 /* "protocol stall" on error */
1674 spin_unlock_irqrestore (&dum
->lock
, flags
);
1676 if ((dum
->port_status
& PORT_C_MASK
) != 0)
1677 usb_hcd_poll_rh_status (hcd
);
1682 /*-------------------------------------------------------------------------*/
1684 static inline ssize_t
1685 show_urb (char *buf
, size_t size
, struct urb
*urb
)
1687 int ep
= usb_pipeendpoint (urb
->pipe
);
1689 return snprintf (buf
, size
,
1690 "urb/%p %s ep%d%s%s len %d/%d\n",
1693 switch (urb
->dev
->speed
) {
1694 case USB_SPEED_LOW
: s
= "ls"; break;
1695 case USB_SPEED_FULL
: s
= "fs"; break;
1696 case USB_SPEED_HIGH
: s
= "hs"; break;
1697 default: s
= "?"; break;
1699 ep
, ep
? (usb_pipein (urb
->pipe
) ? "in" : "out") : "",
1701 switch (usb_pipetype (urb
->pipe
)) { \
1702 case PIPE_CONTROL
: s
= ""; break; \
1703 case PIPE_BULK
: s
= "-bulk"; break; \
1704 case PIPE_INTERRUPT
: s
= "-int"; break; \
1705 default: s
= "-iso"; break; \
1707 urb
->actual_length
, urb
->transfer_buffer_length
);
1711 show_urbs (struct device
*dev
, struct device_attribute
*attr
, char *buf
)
1713 struct usb_hcd
*hcd
= dev_get_drvdata (dev
);
1714 struct dummy
*dum
= hcd_to_dummy (hcd
);
1717 unsigned long flags
;
1719 spin_lock_irqsave (&dum
->lock
, flags
);
1720 list_for_each_entry (urbp
, &dum
->urbp_list
, urbp_list
) {
1723 temp
= show_urb (buf
, PAGE_SIZE
- size
, urbp
->urb
);
1727 spin_unlock_irqrestore (&dum
->lock
, flags
);
1731 static DEVICE_ATTR (urbs
, S_IRUGO
, show_urbs
, NULL
);
1733 static int dummy_start (struct usb_hcd
*hcd
)
1737 dum
= hcd_to_dummy (hcd
);
1740 * MASTER side init ... we emulate a root hub that'll only ever
1741 * talk to one device (the slave side). Also appears in sysfs,
1742 * just like more familiar pci-based HCDs.
1744 spin_lock_init (&dum
->lock
);
1745 init_timer (&dum
->timer
);
1746 dum
->timer
.function
= dummy_timer
;
1747 dum
->timer
.data
= (unsigned long) dum
;
1749 INIT_LIST_HEAD (&dum
->urbp_list
);
1751 /* only show a low-power port: just 8mA */
1752 hcd
->power_budget
= 8;
1753 hcd
->state
= HC_STATE_RUNNING
;
1754 hcd
->uses_new_polling
= 1;
1756 #ifdef CONFIG_USB_OTG
1757 hcd
->self
.otg_port
= 1;
1760 /* FIXME 'urbs' should be a per-device thing, maybe in usbcore */
1761 device_create_file (dummy_dev(dum
), &dev_attr_urbs
);
1765 static void dummy_stop (struct usb_hcd
*hcd
)
1769 dum
= hcd_to_dummy (hcd
);
1771 device_remove_file (dummy_dev(dum
), &dev_attr_urbs
);
1772 usb_gadget_unregister_driver (dum
->driver
);
1773 dev_info (dummy_dev(dum
), "stopped\n");
1776 /*-------------------------------------------------------------------------*/
1778 static int dummy_h_get_frame (struct usb_hcd
*hcd
)
1780 return dummy_g_get_frame (NULL
);
1783 static const struct hc_driver dummy_hcd
= {
1784 .description
= (char *) driver_name
,
1785 .product_desc
= "Dummy host controller",
1786 .hcd_priv_size
= sizeof(struct dummy
),
1790 .start
= dummy_start
,
1793 .urb_enqueue
= dummy_urb_enqueue
,
1794 .urb_dequeue
= dummy_urb_dequeue
,
1796 .get_frame_number
= dummy_h_get_frame
,
1798 .hub_status_data
= dummy_hub_status
,
1799 .hub_control
= dummy_hub_control
,
1802 static int dummy_hcd_probe (struct device
*dev
)
1804 struct usb_hcd
*hcd
;
1807 dev_info (dev
, "%s, driver " DRIVER_VERSION
"\n", driver_desc
);
1809 hcd
= usb_create_hcd (&dummy_hcd
, dev
, dev
->bus_id
);
1812 the_controller
= hcd_to_dummy (hcd
);
1814 retval
= usb_add_hcd(hcd
, 0, 0);
1817 the_controller
= NULL
;
1822 static int dummy_hcd_remove (struct device
*dev
)
1824 struct usb_hcd
*hcd
;
1826 hcd
= dev_get_drvdata (dev
);
1827 usb_remove_hcd (hcd
);
1829 the_controller
= NULL
;
1833 static struct device_driver dummy_hcd_driver
= {
1834 .name
= (char *) driver_name
,
1835 .bus
= &platform_bus_type
,
1836 .probe
= dummy_hcd_probe
,
1837 .remove
= dummy_hcd_remove
,
1840 /*-------------------------------------------------------------------------*/
1842 /* These don't need to do anything because the pdev structures are
1843 * statically allocated. */
1845 dummy_udc_release (struct device
*dev
) {}
1848 dummy_hcd_release (struct device
*dev
) {}
1850 static struct platform_device the_udc_pdev
= {
1851 .name
= (char *) gadget_name
,
1854 .release
= dummy_udc_release
,
1858 static struct platform_device the_hcd_pdev
= {
1859 .name
= (char *) driver_name
,
1862 .release
= dummy_hcd_release
,
1866 static int __init
init (void)
1870 if (usb_disabled ())
1873 retval
= driver_register (&dummy_hcd_driver
);
1877 retval
= driver_register (&dummy_udc_driver
);
1879 goto err_register_udc_driver
;
1881 retval
= platform_device_register (&the_hcd_pdev
);
1883 goto err_register_hcd
;
1885 retval
= platform_device_register (&the_udc_pdev
);
1887 goto err_register_udc
;
1891 platform_device_unregister (&the_hcd_pdev
);
1893 driver_unregister (&dummy_udc_driver
);
1894 err_register_udc_driver
:
1895 driver_unregister (&dummy_hcd_driver
);
1900 static void __exit
cleanup (void)
1902 platform_device_unregister (&the_udc_pdev
);
1903 platform_device_unregister (&the_hcd_pdev
);
1904 driver_unregister (&dummy_udc_driver
);
1905 driver_unregister (&dummy_hcd_driver
);
1907 module_exit (cleanup
);