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 "02 May 2005"
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
;
154 enum dummy_rh_state
{
164 * SLAVE/GADGET side support
166 struct dummy_ep ep
[DUMMY_ENDPOINTS
];
168 struct usb_gadget gadget
;
169 struct usb_gadget_driver
*driver
;
170 struct dummy_request fifo_req
;
171 u8 fifo_buf
[FIFO_SIZE
];
173 unsigned udc_suspended
:1;
176 unsigned old_active
:1;
179 * MASTER/HOST side support
181 enum dummy_rh_state rh_state
;
182 struct timer_list timer
;
186 unsigned long re_timeout
;
188 struct usb_device
*udev
;
189 struct list_head urbp_list
;
192 static inline struct dummy
*hcd_to_dummy (struct usb_hcd
*hcd
)
194 return (struct dummy
*) (hcd
->hcd_priv
);
197 static inline struct usb_hcd
*dummy_to_hcd (struct dummy
*dum
)
199 return container_of((void *) dum
, struct usb_hcd
, hcd_priv
);
202 static inline struct device
*dummy_dev (struct dummy
*dum
)
204 return dummy_to_hcd(dum
)->self
.controller
;
207 static inline struct device
*udc_dev (struct dummy
*dum
)
209 return dum
->gadget
.dev
.parent
;
212 static inline struct dummy
*ep_to_dummy (struct dummy_ep
*ep
)
214 return container_of (ep
->gadget
, struct dummy
, gadget
);
217 static inline struct dummy
*gadget_to_dummy (struct usb_gadget
*gadget
)
219 return container_of (gadget
, struct dummy
, gadget
);
222 static inline struct dummy
*gadget_dev_to_dummy (struct device
*dev
)
224 return container_of (dev
, struct dummy
, gadget
.dev
);
227 static struct dummy
*the_controller
;
229 /*-------------------------------------------------------------------------*/
231 /* SLAVE/GADGET SIDE UTILITY ROUTINES */
233 /* called with spinlock held */
234 static void nuke (struct dummy
*dum
, struct dummy_ep
*ep
)
236 while (!list_empty (&ep
->queue
)) {
237 struct dummy_request
*req
;
239 req
= list_entry (ep
->queue
.next
, struct dummy_request
, queue
);
240 list_del_init (&req
->queue
);
241 req
->req
.status
= -ESHUTDOWN
;
243 spin_unlock (&dum
->lock
);
244 req
->req
.complete (&ep
->ep
, &req
->req
);
245 spin_lock (&dum
->lock
);
249 /* caller must hold lock */
251 stop_activity (struct dummy
*dum
)
255 /* prevent any more requests */
258 /* The timer is left running so that outstanding URBs can fail */
260 /* nuke any pending requests first, so driver i/o is quiesced */
261 list_for_each_entry (ep
, &dum
->gadget
.ep_list
, ep
.ep_list
)
264 /* driver now does any non-usb quiescing necessary */
267 /* caller must hold lock */
269 set_link_state (struct dummy
*dum
)
272 if ((dum
->port_status
& USB_PORT_STAT_POWER
) == 0)
273 dum
->port_status
= 0;
275 /* UDC suspend must cause a disconnect */
276 else if (!dum
->pullup
|| dum
->udc_suspended
) {
277 dum
->port_status
&= ~(USB_PORT_STAT_CONNECTION
|
278 USB_PORT_STAT_ENABLE
|
279 USB_PORT_STAT_LOW_SPEED
|
280 USB_PORT_STAT_HIGH_SPEED
|
281 USB_PORT_STAT_SUSPEND
);
282 if ((dum
->old_status
& USB_PORT_STAT_CONNECTION
) != 0)
283 dum
->port_status
|= (USB_PORT_STAT_C_CONNECTION
<< 16);
285 dum
->port_status
|= USB_PORT_STAT_CONNECTION
;
286 if ((dum
->old_status
& USB_PORT_STAT_CONNECTION
) == 0)
287 dum
->port_status
|= (USB_PORT_STAT_C_CONNECTION
<< 16);
288 if ((dum
->port_status
& USB_PORT_STAT_ENABLE
) == 0)
289 dum
->port_status
&= ~USB_PORT_STAT_SUSPEND
;
290 else if ((dum
->port_status
& USB_PORT_STAT_SUSPEND
) == 0 &&
291 dum
->rh_state
!= DUMMY_RH_SUSPENDED
)
295 if ((dum
->port_status
& USB_PORT_STAT_ENABLE
) == 0 || dum
->active
)
298 if ((dum
->port_status
& USB_PORT_STAT_CONNECTION
) == 0 ||
299 (dum
->port_status
& USB_PORT_STAT_RESET
) != 0) {
300 if ((dum
->old_status
& USB_PORT_STAT_CONNECTION
) != 0 &&
301 (dum
->old_status
& USB_PORT_STAT_RESET
) == 0 &&
304 spin_unlock (&dum
->lock
);
305 dum
->driver
->disconnect (&dum
->gadget
);
306 spin_lock (&dum
->lock
);
308 } else if (dum
->active
!= dum
->old_active
) {
309 if (dum
->old_active
&& dum
->driver
->suspend
) {
310 spin_unlock (&dum
->lock
);
311 dum
->driver
->suspend (&dum
->gadget
);
312 spin_lock (&dum
->lock
);
313 } else if (!dum
->old_active
&& dum
->driver
->resume
) {
314 spin_unlock (&dum
->lock
);
315 dum
->driver
->resume (&dum
->gadget
);
316 spin_lock (&dum
->lock
);
320 dum
->old_status
= dum
->port_status
;
321 dum
->old_active
= dum
->active
;
324 /*-------------------------------------------------------------------------*/
326 /* SLAVE/GADGET SIDE DRIVER
328 * This only tracks gadget state. All the work is done when the host
329 * side tries some (emulated) i/o operation. Real device controller
330 * drivers would do real i/o using dma, fifos, irqs, timers, etc.
333 #define is_enabled(dum) \
334 (dum->port_status & USB_PORT_STAT_ENABLE)
337 dummy_enable (struct usb_ep
*_ep
, const struct usb_endpoint_descriptor
*desc
)
344 ep
= usb_ep_to_dummy_ep (_ep
);
345 if (!_ep
|| !desc
|| ep
->desc
|| _ep
->name
== ep0name
346 || desc
->bDescriptorType
!= USB_DT_ENDPOINT
)
348 dum
= ep_to_dummy (ep
);
349 if (!dum
->driver
|| !is_enabled (dum
))
351 max
= le16_to_cpu(desc
->wMaxPacketSize
) & 0x3ff;
353 /* drivers must not request bad settings, since lower levels
354 * (hardware or its drivers) may not check. some endpoints
355 * can't do iso, many have maxpacket limitations, etc.
357 * since this "hardware" driver is here to help debugging, we
358 * have some extra sanity checks. (there could be more though,
359 * especially for "ep9out" style fixed function ones.)
362 switch (desc
->bmAttributes
& 0x03) {
363 case USB_ENDPOINT_XFER_BULK
:
364 if (strstr (ep
->ep
.name
, "-iso")
365 || strstr (ep
->ep
.name
, "-int")) {
368 switch (dum
->gadget
.speed
) {
372 /* conserve return statements */
375 case 8: case 16: case 32: case 64:
376 /* we'll fake any legal size */
384 case USB_ENDPOINT_XFER_INT
:
385 if (strstr (ep
->ep
.name
, "-iso")) /* bulk is ok */
387 /* real hardware might not handle all packet sizes */
388 switch (dum
->gadget
.speed
) {
392 /* save a return statement */
396 /* save a return statement */
403 case USB_ENDPOINT_XFER_ISOC
:
404 if (strstr (ep
->ep
.name
, "-bulk")
405 || strstr (ep
->ep
.name
, "-int"))
407 /* real hardware might not handle all packet sizes */
408 switch (dum
->gadget
.speed
) {
412 /* save a return statement */
416 /* save a return statement */
422 /* few chips support control except on ep0 */
426 _ep
->maxpacket
= max
;
429 dev_dbg (udc_dev(dum
), "enabled %s (ep%d%s-%s) maxpacket %d\n",
431 desc
->bEndpointAddress
& 0x0f,
432 (desc
->bEndpointAddress
& USB_DIR_IN
) ? "in" : "out",
434 switch (desc
->bmAttributes
& 0x03) {
435 case USB_ENDPOINT_XFER_BULK
: val
= "bulk"; break;
436 case USB_ENDPOINT_XFER_ISOC
: val
= "iso"; break;
437 case USB_ENDPOINT_XFER_INT
: val
= "intr"; break;
438 default: val
= "ctrl"; break;
442 /* at this point real hardware should be NAKing transfers
443 * to that endpoint, until a buffer is queued to it.
450 static int dummy_disable (struct usb_ep
*_ep
)
457 ep
= usb_ep_to_dummy_ep (_ep
);
458 if (!_ep
|| !ep
->desc
|| _ep
->name
== ep0name
)
460 dum
= ep_to_dummy (ep
);
462 spin_lock_irqsave (&dum
->lock
, flags
);
466 spin_unlock_irqrestore (&dum
->lock
, flags
);
468 dev_dbg (udc_dev(dum
), "disabled %s\n", _ep
->name
);
472 static struct usb_request
*
473 dummy_alloc_request (struct usb_ep
*_ep
, gfp_t mem_flags
)
476 struct dummy_request
*req
;
480 ep
= usb_ep_to_dummy_ep (_ep
);
482 req
= kmalloc (sizeof *req
, mem_flags
);
485 memset (req
, 0, sizeof *req
);
486 INIT_LIST_HEAD (&req
->queue
);
491 dummy_free_request (struct usb_ep
*_ep
, struct usb_request
*_req
)
494 struct dummy_request
*req
;
496 ep
= usb_ep_to_dummy_ep (_ep
);
497 if (!ep
|| !_req
|| (!ep
->desc
&& _ep
->name
!= ep0name
))
500 req
= usb_request_to_dummy_request (_req
);
501 WARN_ON (!list_empty (&req
->queue
));
516 ep
= usb_ep_to_dummy_ep (_ep
);
517 dum
= ep_to_dummy (ep
);
521 retval
= kmalloc (bytes
, mem_flags
);
522 *dma
= (dma_addr_t
) retval
;
538 fifo_complete (struct usb_ep
*ep
, struct usb_request
*req
)
543 dummy_queue (struct usb_ep
*_ep
, struct usb_request
*_req
,
547 struct dummy_request
*req
;
551 req
= usb_request_to_dummy_request (_req
);
552 if (!_req
|| !list_empty (&req
->queue
) || !_req
->complete
)
555 ep
= usb_ep_to_dummy_ep (_ep
);
556 if (!_ep
|| (!ep
->desc
&& _ep
->name
!= ep0name
))
559 dum
= ep_to_dummy (ep
);
560 if (!dum
->driver
|| !is_enabled (dum
))
564 dev_dbg (udc_dev(dum
), "ep %p queue req %p to %s, len %d buf %p\n",
565 ep
, _req
, _ep
->name
, _req
->length
, _req
->buf
);
568 _req
->status
= -EINPROGRESS
;
570 spin_lock_irqsave (&dum
->lock
, flags
);
572 /* implement an emulated single-request FIFO */
573 if (ep
->desc
&& (ep
->desc
->bEndpointAddress
& USB_DIR_IN
) &&
574 list_empty (&dum
->fifo_req
.queue
) &&
575 list_empty (&ep
->queue
) &&
576 _req
->length
<= FIFO_SIZE
) {
577 req
= &dum
->fifo_req
;
579 req
->req
.buf
= dum
->fifo_buf
;
580 memcpy (dum
->fifo_buf
, _req
->buf
, _req
->length
);
581 req
->req
.context
= dum
;
582 req
->req
.complete
= fifo_complete
;
584 spin_unlock (&dum
->lock
);
585 _req
->actual
= _req
->length
;
587 _req
->complete (_ep
, _req
);
588 spin_lock (&dum
->lock
);
590 list_add_tail (&req
->queue
, &ep
->queue
);
591 spin_unlock_irqrestore (&dum
->lock
, flags
);
593 /* real hardware would likely enable transfers here, in case
594 * it'd been left NAKing.
599 static int dummy_dequeue (struct usb_ep
*_ep
, struct usb_request
*_req
)
603 int retval
= -EINVAL
;
605 struct dummy_request
*req
= NULL
;
609 ep
= usb_ep_to_dummy_ep (_ep
);
610 dum
= ep_to_dummy (ep
);
615 spin_lock_irqsave (&dum
->lock
, flags
);
616 list_for_each_entry (req
, &ep
->queue
, queue
) {
617 if (&req
->req
== _req
) {
618 list_del_init (&req
->queue
);
619 _req
->status
= -ECONNRESET
;
624 spin_unlock_irqrestore (&dum
->lock
, flags
);
627 dev_dbg (udc_dev(dum
),
628 "dequeued req %p from %s, len %d buf %p\n",
629 req
, _ep
->name
, _req
->length
, _req
->buf
);
630 _req
->complete (_ep
, _req
);
636 dummy_set_halt (struct usb_ep
*_ep
, int value
)
643 ep
= usb_ep_to_dummy_ep (_ep
);
644 dum
= ep_to_dummy (ep
);
649 else if (ep
->desc
&& (ep
->desc
->bEndpointAddress
& USB_DIR_IN
) &&
650 !list_empty (&ep
->queue
))
654 /* FIXME clear emulated data toggle too */
658 static const struct usb_ep_ops dummy_ep_ops
= {
659 .enable
= dummy_enable
,
660 .disable
= dummy_disable
,
662 .alloc_request
= dummy_alloc_request
,
663 .free_request
= dummy_free_request
,
665 .alloc_buffer
= dummy_alloc_buffer
,
666 .free_buffer
= dummy_free_buffer
,
667 /* map, unmap, ... eventually hook the "generic" dma calls */
669 .queue
= dummy_queue
,
670 .dequeue
= dummy_dequeue
,
672 .set_halt
= dummy_set_halt
,
675 /*-------------------------------------------------------------------------*/
677 /* there are both host and device side versions of this call ... */
678 static int dummy_g_get_frame (struct usb_gadget
*_gadget
)
682 do_gettimeofday (&tv
);
683 return tv
.tv_usec
/ 1000;
686 static int dummy_wakeup (struct usb_gadget
*_gadget
)
690 dum
= gadget_to_dummy (_gadget
);
691 if (!(dum
->devstatus
& ( (1 << USB_DEVICE_B_HNP_ENABLE
)
692 | (1 << USB_DEVICE_REMOTE_WAKEUP
))))
694 if ((dum
->port_status
& USB_PORT_STAT_CONNECTION
) == 0)
696 if ((dum
->port_status
& USB_PORT_STAT_SUSPEND
) == 0 &&
697 dum
->rh_state
!= DUMMY_RH_SUSPENDED
)
700 /* FIXME: What if the root hub is suspended but the port isn't? */
702 /* hub notices our request, issues downstream resume, etc */
704 dum
->re_timeout
= jiffies
+ msecs_to_jiffies(20);
705 mod_timer (&dummy_to_hcd (dum
)->rh_timer
, dum
->re_timeout
);
709 static int dummy_set_selfpowered (struct usb_gadget
*_gadget
, int value
)
713 dum
= gadget_to_dummy (_gadget
);
715 dum
->devstatus
|= (1 << USB_DEVICE_SELF_POWERED
);
717 dum
->devstatus
&= ~(1 << USB_DEVICE_SELF_POWERED
);
721 static int dummy_pullup (struct usb_gadget
*_gadget
, int value
)
726 dum
= gadget_to_dummy (_gadget
);
727 spin_lock_irqsave (&dum
->lock
, flags
);
728 dum
->pullup
= (value
!= 0);
729 set_link_state (dum
);
730 spin_unlock_irqrestore (&dum
->lock
, flags
);
732 usb_hcd_poll_rh_status (dummy_to_hcd (dum
));
736 static const struct usb_gadget_ops dummy_ops
= {
737 .get_frame
= dummy_g_get_frame
,
738 .wakeup
= dummy_wakeup
,
739 .set_selfpowered
= dummy_set_selfpowered
,
740 .pullup
= dummy_pullup
,
743 /*-------------------------------------------------------------------------*/
745 /* "function" sysfs attribute */
747 show_function (struct device
*dev
, struct device_attribute
*attr
, char *buf
)
749 struct dummy
*dum
= gadget_dev_to_dummy (dev
);
751 if (!dum
->driver
|| !dum
->driver
->function
)
753 return scnprintf (buf
, PAGE_SIZE
, "%s\n", dum
->driver
->function
);
755 static DEVICE_ATTR (function
, S_IRUGO
, show_function
, NULL
);
757 /*-------------------------------------------------------------------------*/
760 * Driver registration/unregistration.
762 * This is basically hardware-specific; there's usually only one real USB
763 * device (not host) controller since that's how USB devices are intended
764 * to work. So most implementations of these api calls will rely on the
765 * fact that only one driver will ever bind to the hardware. But curious
766 * hardware can be built with discrete components, so the gadget API doesn't
767 * require that assumption.
769 * For this emulator, it might be convenient to create a usb slave device
770 * for each driver that registers: just add to a big root hub.
774 usb_gadget_register_driver (struct usb_gadget_driver
*driver
)
776 struct dummy
*dum
= the_controller
;
783 if (!driver
->bind
|| !driver
->unbind
|| !driver
->setup
784 || driver
->speed
== USB_SPEED_UNKNOWN
)
788 * SLAVE side init ... the layer above hardware, which
789 * can't enumerate without help from the driver we're binding.
794 INIT_LIST_HEAD (&dum
->gadget
.ep_list
);
795 for (i
= 0; i
< DUMMY_ENDPOINTS
; i
++) {
796 struct dummy_ep
*ep
= &dum
->ep
[i
];
800 ep
->ep
.name
= ep_name
[i
];
801 ep
->ep
.ops
= &dummy_ep_ops
;
802 list_add_tail (&ep
->ep
.ep_list
, &dum
->gadget
.ep_list
);
803 ep
->halted
= ep
->already_seen
= ep
->setup_stage
= 0;
804 ep
->ep
.maxpacket
= ~0;
805 ep
->last_io
= jiffies
;
806 ep
->gadget
= &dum
->gadget
;
808 INIT_LIST_HEAD (&ep
->queue
);
811 dum
->gadget
.ep0
= &dum
->ep
[0].ep
;
812 dum
->ep
[0].ep
.maxpacket
= 64;
813 list_del_init (&dum
->ep
[0].ep
.ep_list
);
814 INIT_LIST_HEAD(&dum
->fifo_req
.queue
);
816 dum
->driver
= driver
;
817 dum
->gadget
.dev
.driver
= &driver
->driver
;
818 dev_dbg (udc_dev(dum
), "binding gadget driver '%s'\n",
819 driver
->driver
.name
);
820 if ((retval
= driver
->bind (&dum
->gadget
)) != 0) {
822 dum
->gadget
.dev
.driver
= NULL
;
826 driver
->driver
.bus
= dum
->gadget
.dev
.parent
->bus
;
827 driver_register (&driver
->driver
);
828 device_bind_driver (&dum
->gadget
.dev
);
830 /* khubd will enumerate this in a while */
831 spin_lock_irq (&dum
->lock
);
833 set_link_state (dum
);
834 spin_unlock_irq (&dum
->lock
);
836 usb_hcd_poll_rh_status (dummy_to_hcd (dum
));
839 EXPORT_SYMBOL (usb_gadget_register_driver
);
842 usb_gadget_unregister_driver (struct usb_gadget_driver
*driver
)
844 struct dummy
*dum
= the_controller
;
849 if (!driver
|| driver
!= dum
->driver
)
852 dev_dbg (udc_dev(dum
), "unregister gadget driver '%s'\n",
853 driver
->driver
.name
);
855 spin_lock_irqsave (&dum
->lock
, flags
);
857 set_link_state (dum
);
858 spin_unlock_irqrestore (&dum
->lock
, flags
);
860 driver
->unbind (&dum
->gadget
);
863 device_release_driver (&dum
->gadget
.dev
);
864 driver_unregister (&driver
->driver
);
866 spin_lock_irqsave (&dum
->lock
, flags
);
868 set_link_state (dum
);
869 spin_unlock_irqrestore (&dum
->lock
, flags
);
871 usb_hcd_poll_rh_status (dummy_to_hcd (dum
));
874 EXPORT_SYMBOL (usb_gadget_unregister_driver
);
878 /* just declare this in any driver that really need it */
879 extern int net2280_set_fifo_mode (struct usb_gadget
*gadget
, int mode
);
881 int net2280_set_fifo_mode (struct usb_gadget
*gadget
, int mode
)
885 EXPORT_SYMBOL (net2280_set_fifo_mode
);
888 /* The gadget structure is stored inside the hcd structure and will be
889 * released along with it. */
891 dummy_gadget_release (struct device
*dev
)
893 #if 0 /* usb_bus_put isn't EXPORTed! */
894 struct dummy
*dum
= gadget_dev_to_dummy (dev
);
896 usb_bus_put (&dummy_to_hcd (dum
)->self
);
900 static int dummy_udc_probe (struct device
*dev
)
902 struct dummy
*dum
= the_controller
;
905 dum
->gadget
.name
= gadget_name
;
906 dum
->gadget
.ops
= &dummy_ops
;
907 dum
->gadget
.is_dualspeed
= 1;
909 /* maybe claim OTG support, though we won't complete HNP */
910 dum
->gadget
.is_otg
= (dummy_to_hcd(dum
)->self
.otg_port
!= 0);
912 strcpy (dum
->gadget
.dev
.bus_id
, "gadget");
913 dum
->gadget
.dev
.parent
= dev
;
914 dum
->gadget
.dev
.release
= dummy_gadget_release
;
915 rc
= device_register (&dum
->gadget
.dev
);
919 #if 0 /* usb_bus_get isn't EXPORTed! */
920 usb_bus_get (&dummy_to_hcd (dum
)->self
);
923 dev_set_drvdata (dev
, dum
);
924 device_create_file (&dum
->gadget
.dev
, &dev_attr_function
);
928 static int dummy_udc_remove (struct device
*dev
)
930 struct dummy
*dum
= dev_get_drvdata (dev
);
932 dev_set_drvdata (dev
, NULL
);
933 device_remove_file (&dum
->gadget
.dev
, &dev_attr_function
);
934 device_unregister (&dum
->gadget
.dev
);
938 static int dummy_udc_suspend (struct device
*dev
, pm_message_t state
,
941 struct dummy
*dum
= dev_get_drvdata(dev
);
943 if (level
!= SUSPEND_DISABLE
)
946 dev_dbg (dev
, "%s\n", __FUNCTION__
);
947 spin_lock_irq (&dum
->lock
);
948 dum
->udc_suspended
= 1;
949 set_link_state (dum
);
950 spin_unlock_irq (&dum
->lock
);
952 dev
->power
.power_state
= state
;
953 usb_hcd_poll_rh_status (dummy_to_hcd (dum
));
957 static int dummy_udc_resume (struct device
*dev
, u32 level
)
959 struct dummy
*dum
= dev_get_drvdata(dev
);
961 if (level
!= RESUME_ENABLE
)
964 dev_dbg (dev
, "%s\n", __FUNCTION__
);
965 spin_lock_irq (&dum
->lock
);
966 dum
->udc_suspended
= 0;
967 set_link_state (dum
);
968 spin_unlock_irq (&dum
->lock
);
970 dev
->power
.power_state
= PMSG_ON
;
971 usb_hcd_poll_rh_status (dummy_to_hcd (dum
));
975 static struct device_driver dummy_udc_driver
= {
976 .name
= (char *) gadget_name
,
977 .bus
= &platform_bus_type
,
978 .probe
= dummy_udc_probe
,
979 .remove
= dummy_udc_remove
,
980 .suspend
= dummy_udc_suspend
,
981 .resume
= dummy_udc_resume
,
984 /*-------------------------------------------------------------------------*/
986 /* MASTER/HOST SIDE DRIVER
988 * this uses the hcd framework to hook up to host side drivers.
989 * its root hub will only have one device, otherwise it acts like
990 * a normal host controller.
992 * when urbs are queued, they're just stuck on a list that we
993 * scan in a timer callback. that callback connects writes from
994 * the host with reads from the device, and so on, based on the
998 static int dummy_urb_enqueue (
1000 struct usb_host_endpoint
*ep
,
1006 unsigned long flags
;
1008 if (!urb
->transfer_buffer
&& urb
->transfer_buffer_length
)
1011 urbp
= kmalloc (sizeof *urbp
, mem_flags
);
1016 dum
= hcd_to_dummy (hcd
);
1017 spin_lock_irqsave (&dum
->lock
, flags
);
1020 dum
->udev
= urb
->dev
;
1021 usb_get_dev (dum
->udev
);
1022 } else if (unlikely (dum
->udev
!= urb
->dev
))
1023 dev_err (dummy_dev(dum
), "usb_device address has changed!\n");
1025 list_add_tail (&urbp
->urbp_list
, &dum
->urbp_list
);
1027 if (usb_pipetype (urb
->pipe
) == PIPE_CONTROL
)
1028 urb
->error_count
= 1; /* mark as a new urb */
1030 /* kick the scheduler, it'll do the rest */
1031 if (!timer_pending (&dum
->timer
))
1032 mod_timer (&dum
->timer
, jiffies
+ 1);
1034 spin_unlock_irqrestore (&dum
->lock
, flags
);
1038 static int dummy_urb_dequeue (struct usb_hcd
*hcd
, struct urb
*urb
)
1041 unsigned long flags
;
1043 /* giveback happens automatically in timer callback,
1044 * so make sure the callback happens */
1045 dum
= hcd_to_dummy (hcd
);
1046 spin_lock_irqsave (&dum
->lock
, flags
);
1047 if (dum
->rh_state
!= DUMMY_RH_RUNNING
&& !list_empty(&dum
->urbp_list
))
1048 mod_timer (&dum
->timer
, jiffies
);
1049 spin_unlock_irqrestore (&dum
->lock
, flags
);
1053 static void maybe_set_status (struct urb
*urb
, int status
)
1055 spin_lock (&urb
->lock
);
1056 if (urb
->status
== -EINPROGRESS
)
1057 urb
->status
= status
;
1058 spin_unlock (&urb
->lock
);
1061 /* transfer up to a frame's worth; caller must own lock */
1063 transfer (struct dummy
*dum
, struct urb
*urb
, struct dummy_ep
*ep
, int limit
)
1065 struct dummy_request
*req
;
1068 /* if there's no request queued, the device is NAKing; return */
1069 list_for_each_entry (req
, &ep
->queue
, queue
) {
1070 unsigned host_len
, dev_len
, len
;
1071 int is_short
, to_host
;
1074 /* 1..N packets of ep->ep.maxpacket each ... the last one
1075 * may be short (including zero length).
1077 * writer can send a zlp explicitly (length 0) or implicitly
1078 * (length mod maxpacket zero, and 'zero' flag); they always
1081 host_len
= urb
->transfer_buffer_length
- urb
->actual_length
;
1082 dev_len
= req
->req
.length
- req
->req
.actual
;
1083 len
= min (host_len
, dev_len
);
1085 /* FIXME update emulated data toggle too */
1087 to_host
= usb_pipein (urb
->pipe
);
1088 if (unlikely (len
== 0))
1093 /* not enough bandwidth left? */
1094 if (limit
< ep
->ep
.maxpacket
&& limit
< len
)
1096 len
= min (len
, (unsigned) limit
);
1100 /* use an extra pass for the final short packet */
1101 if (len
> ep
->ep
.maxpacket
) {
1103 len
-= (len
% ep
->ep
.maxpacket
);
1105 is_short
= (len
% ep
->ep
.maxpacket
) != 0;
1107 /* else transfer packet(s) */
1108 ubuf
= urb
->transfer_buffer
+ urb
->actual_length
;
1109 rbuf
= req
->req
.buf
+ req
->req
.actual
;
1111 memcpy (ubuf
, rbuf
, len
);
1113 memcpy (rbuf
, ubuf
, len
);
1114 ep
->last_io
= jiffies
;
1117 urb
->actual_length
+= len
;
1118 req
->req
.actual
+= len
;
1121 /* short packets terminate, maybe with overflow/underflow.
1122 * it's only really an error to write too much.
1124 * partially filling a buffer optionally blocks queue advances
1125 * (so completion handlers can clean up the queue) but we don't
1126 * need to emulate such data-in-flight. so we only show part
1127 * of the URB_SHORT_NOT_OK effect: completion status.
1130 if (host_len
== dev_len
) {
1131 req
->req
.status
= 0;
1132 maybe_set_status (urb
, 0);
1133 } else if (to_host
) {
1134 req
->req
.status
= 0;
1135 if (dev_len
> host_len
)
1136 maybe_set_status (urb
, -EOVERFLOW
);
1138 maybe_set_status (urb
,
1139 (urb
->transfer_flags
1142 } else if (!to_host
) {
1143 maybe_set_status (urb
, 0);
1144 if (host_len
> dev_len
)
1145 req
->req
.status
= -EOVERFLOW
;
1147 req
->req
.status
= 0;
1150 /* many requests terminate without a short packet */
1152 if (req
->req
.length
== req
->req
.actual
1154 req
->req
.status
= 0;
1155 if (urb
->transfer_buffer_length
== urb
->actual_length
1156 && !(urb
->transfer_flags
1157 & URB_ZERO_PACKET
)) {
1158 maybe_set_status (urb
, 0);
1162 /* device side completion --> continuable */
1163 if (req
->req
.status
!= -EINPROGRESS
) {
1164 list_del_init (&req
->queue
);
1166 spin_unlock (&dum
->lock
);
1167 req
->req
.complete (&ep
->ep
, &req
->req
);
1168 spin_lock (&dum
->lock
);
1170 /* requests might have been unlinked... */
1174 /* host side completion --> terminate */
1175 if (urb
->status
!= -EINPROGRESS
)
1178 /* rescan to continue with any other queued i/o */
1185 static int periodic_bytes (struct dummy
*dum
, struct dummy_ep
*ep
)
1187 int limit
= ep
->ep
.maxpacket
;
1189 if (dum
->gadget
.speed
== USB_SPEED_HIGH
) {
1192 /* high bandwidth mode */
1193 tmp
= le16_to_cpu(ep
->desc
->wMaxPacketSize
);
1194 tmp
= (tmp
>> 11) & 0x03;
1195 tmp
*= 8 /* applies to entire frame */;
1196 limit
+= limit
* tmp
;
1201 #define is_active(dum) ((dum->port_status & \
1202 (USB_PORT_STAT_CONNECTION | USB_PORT_STAT_ENABLE | \
1203 USB_PORT_STAT_SUSPEND)) \
1204 == (USB_PORT_STAT_CONNECTION | USB_PORT_STAT_ENABLE))
1206 static struct dummy_ep
*find_endpoint (struct dummy
*dum
, u8 address
)
1210 if (!is_active (dum
))
1212 if ((address
& ~USB_DIR_IN
) == 0)
1213 return &dum
->ep
[0];
1214 for (i
= 1; i
< DUMMY_ENDPOINTS
; i
++) {
1215 struct dummy_ep
*ep
= &dum
->ep
[i
];
1219 if (ep
->desc
->bEndpointAddress
== address
)
1227 #define Dev_Request (USB_TYPE_STANDARD | USB_RECIP_DEVICE)
1228 #define Dev_InRequest (Dev_Request | USB_DIR_IN)
1229 #define Intf_Request (USB_TYPE_STANDARD | USB_RECIP_INTERFACE)
1230 #define Intf_InRequest (Intf_Request | USB_DIR_IN)
1231 #define Ep_Request (USB_TYPE_STANDARD | USB_RECIP_ENDPOINT)
1232 #define Ep_InRequest (Ep_Request | USB_DIR_IN)
1234 /* drive both sides of the transfers; looks like irq handlers to
1235 * both drivers except the callbacks aren't in_irq().
1237 static void dummy_timer (unsigned long _dum
)
1239 struct dummy
*dum
= (struct dummy
*) _dum
;
1240 struct urbp
*urbp
, *tmp
;
1241 unsigned long flags
;
1245 /* simplistic model for one frame's bandwidth */
1246 switch (dum
->gadget
.speed
) {
1248 total
= 8/*bytes*/ * 12/*packets*/;
1250 case USB_SPEED_FULL
:
1251 total
= 64/*bytes*/ * 19/*packets*/;
1253 case USB_SPEED_HIGH
:
1254 total
= 512/*bytes*/ * 13/*packets*/ * 8/*uframes*/;
1257 dev_err (dummy_dev(dum
), "bogus device speed\n");
1261 /* FIXME if HZ != 1000 this will probably misbehave ... */
1263 /* look at each urb queued by the host side driver */
1264 spin_lock_irqsave (&dum
->lock
, flags
);
1267 dev_err (dummy_dev(dum
),
1268 "timer fired with no URBs pending?\n");
1269 spin_unlock_irqrestore (&dum
->lock
, flags
);
1273 for (i
= 0; i
< DUMMY_ENDPOINTS
; i
++) {
1276 dum
->ep
[i
].already_seen
= 0;
1280 list_for_each_entry_safe (urbp
, tmp
, &dum
->urbp_list
, urbp_list
) {
1282 struct dummy_request
*req
;
1284 struct dummy_ep
*ep
= NULL
;
1288 if (urb
->status
!= -EINPROGRESS
) {
1289 /* likely it was just unlinked */
1291 } else if (dum
->rh_state
!= DUMMY_RH_RUNNING
)
1293 type
= usb_pipetype (urb
->pipe
);
1295 /* used up this frame's non-periodic bandwidth?
1296 * FIXME there's infinite bandwidth for control and
1297 * periodic transfers ... unrealistic.
1299 if (total
<= 0 && type
== PIPE_BULK
)
1302 /* find the gadget's ep for this request (if configured) */
1303 address
= usb_pipeendpoint (urb
->pipe
);
1304 if (usb_pipein (urb
->pipe
))
1305 address
|= USB_DIR_IN
;
1306 ep
= find_endpoint(dum
, address
);
1308 /* set_configuration() disagreement */
1309 dev_dbg (dummy_dev(dum
),
1310 "no ep configured for urb %p\n",
1312 maybe_set_status (urb
, -EPROTO
);
1316 if (ep
->already_seen
)
1318 ep
->already_seen
= 1;
1319 if (ep
== &dum
->ep
[0] && urb
->error_count
) {
1320 ep
->setup_stage
= 1; /* a new urb */
1321 urb
->error_count
= 0;
1323 if (ep
->halted
&& !ep
->setup_stage
) {
1324 /* NOTE: must not be iso! */
1325 dev_dbg (dummy_dev(dum
), "ep %s halted, urb %p\n",
1327 maybe_set_status (urb
, -EPIPE
);
1330 /* FIXME make sure both ends agree on maxpacket */
1332 /* handle control requests */
1333 if (ep
== &dum
->ep
[0] && ep
->setup_stage
) {
1334 struct usb_ctrlrequest setup
;
1336 struct dummy_ep
*ep2
;
1340 setup
= *(struct usb_ctrlrequest
*) urb
->setup_packet
;
1341 w_index
= le16_to_cpu(setup
.wIndex
);
1342 w_value
= le16_to_cpu(setup
.wValue
);
1343 if (le16_to_cpu(setup
.wLength
) !=
1344 urb
->transfer_buffer_length
) {
1345 maybe_set_status (urb
, -EOVERFLOW
);
1349 /* paranoia, in case of stale queued data */
1350 list_for_each_entry (req
, &ep
->queue
, queue
) {
1351 list_del_init (&req
->queue
);
1352 req
->req
.status
= -EOVERFLOW
;
1353 dev_dbg (udc_dev(dum
), "stale req = %p\n",
1356 spin_unlock (&dum
->lock
);
1357 req
->req
.complete (&ep
->ep
, &req
->req
);
1358 spin_lock (&dum
->lock
);
1359 ep
->already_seen
= 0;
1363 /* gadget driver never sees set_address or operations
1364 * on standard feature flags. some hardware doesn't
1367 ep
->last_io
= jiffies
;
1368 ep
->setup_stage
= 0;
1370 switch (setup
.bRequest
) {
1371 case USB_REQ_SET_ADDRESS
:
1372 if (setup
.bRequestType
!= Dev_Request
)
1374 dum
->address
= w_value
;
1375 maybe_set_status (urb
, 0);
1376 dev_dbg (udc_dev(dum
), "set_address = %d\n",
1380 case USB_REQ_SET_FEATURE
:
1381 if (setup
.bRequestType
== Dev_Request
) {
1384 case USB_DEVICE_REMOTE_WAKEUP
:
1386 case USB_DEVICE_B_HNP_ENABLE
:
1387 dum
->gadget
.b_hnp_enable
= 1;
1389 case USB_DEVICE_A_HNP_SUPPORT
:
1390 dum
->gadget
.a_hnp_support
= 1;
1392 case USB_DEVICE_A_ALT_HNP_SUPPORT
:
1393 dum
->gadget
.a_alt_hnp_support
1397 value
= -EOPNOTSUPP
;
1402 maybe_set_status (urb
, 0);
1405 } else if (setup
.bRequestType
== Ep_Request
) {
1407 ep2
= find_endpoint (dum
, w_index
);
1409 value
= -EOPNOTSUPP
;
1414 maybe_set_status (urb
, 0);
1417 case USB_REQ_CLEAR_FEATURE
:
1418 if (setup
.bRequestType
== Dev_Request
) {
1420 case USB_DEVICE_REMOTE_WAKEUP
:
1421 dum
->devstatus
&= ~(1 <<
1422 USB_DEVICE_REMOTE_WAKEUP
);
1424 maybe_set_status (urb
, 0);
1427 value
= -EOPNOTSUPP
;
1430 } else if (setup
.bRequestType
== Ep_Request
) {
1432 ep2
= find_endpoint (dum
, w_index
);
1434 value
= -EOPNOTSUPP
;
1439 maybe_set_status (urb
, 0);
1442 case USB_REQ_GET_STATUS
:
1443 if (setup
.bRequestType
== Dev_InRequest
1444 || setup
.bRequestType
1446 || setup
.bRequestType
1451 // device: remote wakeup, selfpowered
1452 // interface: nothing
1454 buf
= (char *)urb
->transfer_buffer
;
1455 if (urb
->transfer_buffer_length
> 0) {
1456 if (setup
.bRequestType
==
1458 ep2
= find_endpoint (dum
, w_index
);
1460 value
= -EOPNOTSUPP
;
1463 buf
[0] = ep2
->halted
;
1464 } else if (setup
.bRequestType
==
1471 if (urb
->transfer_buffer_length
> 1)
1473 urb
->actual_length
= min (2,
1474 urb
->transfer_buffer_length
);
1476 maybe_set_status (urb
, 0);
1481 /* gadget driver handles all other requests. block
1482 * until setup() returns; no reentrancy issues etc.
1485 spin_unlock (&dum
->lock
);
1486 value
= dum
->driver
->setup (&dum
->gadget
,
1488 spin_lock (&dum
->lock
);
1491 /* no delays (max 64KB data stage) */
1493 goto treat_control_like_bulk
;
1495 /* error, see below */
1499 if (value
!= -EOPNOTSUPP
)
1500 dev_dbg (udc_dev(dum
),
1503 maybe_set_status (urb
, -EPIPE
);
1504 urb
->actual_length
= 0;
1510 /* non-control requests */
1512 switch (usb_pipetype (urb
->pipe
)) {
1513 case PIPE_ISOCHRONOUS
:
1514 /* FIXME is it urb->interval since the last xfer?
1515 * use urb->iso_frame_desc[i].
1516 * complete whether or not ep has requests queued.
1517 * report random errors, to debug drivers.
1519 limit
= max (limit
, periodic_bytes (dum
, ep
));
1520 maybe_set_status (urb
, -ENOSYS
);
1523 case PIPE_INTERRUPT
:
1524 /* FIXME is it urb->interval since the last xfer?
1525 * this almost certainly polls too fast.
1527 limit
= max (limit
, periodic_bytes (dum
, ep
));
1530 // case PIPE_BULK: case PIPE_CONTROL:
1532 treat_control_like_bulk
:
1533 ep
->last_io
= jiffies
;
1534 total
= transfer (dum
, urb
, ep
, limit
);
1538 /* incomplete transfer? */
1539 if (urb
->status
== -EINPROGRESS
)
1544 list_del (&urbp
->urbp_list
);
1547 ep
->already_seen
= ep
->setup_stage
= 0;
1549 spin_unlock (&dum
->lock
);
1550 usb_hcd_giveback_urb (dummy_to_hcd(dum
), urb
, NULL
);
1551 spin_lock (&dum
->lock
);
1556 if (list_empty (&dum
->urbp_list
)) {
1557 usb_put_dev (dum
->udev
);
1559 } else if (dum
->rh_state
== DUMMY_RH_RUNNING
) {
1560 /* want a 1 msec delay here */
1561 mod_timer (&dum
->timer
, jiffies
+ msecs_to_jiffies(1));
1564 spin_unlock_irqrestore (&dum
->lock
, flags
);
1567 /*-------------------------------------------------------------------------*/
1569 #define PORT_C_MASK \
1570 ((USB_PORT_STAT_C_CONNECTION \
1571 | USB_PORT_STAT_C_ENABLE \
1572 | USB_PORT_STAT_C_SUSPEND \
1573 | USB_PORT_STAT_C_OVERCURRENT \
1574 | USB_PORT_STAT_C_RESET) << 16)
1576 static int dummy_hub_status (struct usb_hcd
*hcd
, char *buf
)
1579 unsigned long flags
;
1582 dum
= hcd_to_dummy (hcd
);
1584 spin_lock_irqsave (&dum
->lock
, flags
);
1585 if (hcd
->state
!= HC_STATE_RUNNING
)
1588 if (dum
->resuming
&& time_after_eq (jiffies
, dum
->re_timeout
)) {
1589 dum
->port_status
|= (USB_PORT_STAT_C_SUSPEND
<< 16);
1590 dum
->port_status
&= ~USB_PORT_STAT_SUSPEND
;
1591 set_link_state (dum
);
1594 if ((dum
->port_status
& PORT_C_MASK
) != 0) {
1596 dev_dbg (dummy_dev(dum
), "port status 0x%08x has changes\n",
1599 if (dum
->rh_state
== DUMMY_RH_SUSPENDED
)
1600 usb_hcd_resume_root_hub (hcd
);
1603 spin_unlock_irqrestore (&dum
->lock
, flags
);
1608 hub_descriptor (struct usb_hub_descriptor
*desc
)
1610 memset (desc
, 0, sizeof *desc
);
1611 desc
->bDescriptorType
= 0x29;
1612 desc
->bDescLength
= 9;
1613 desc
->wHubCharacteristics
= (__force __u16
)
1614 (__constant_cpu_to_le16 (0x0001));
1615 desc
->bNbrPorts
= 1;
1616 desc
->bitmap
[0] = 0xff;
1617 desc
->bitmap
[1] = 0xff;
1620 static int dummy_hub_control (
1621 struct usb_hcd
*hcd
,
1630 unsigned long flags
;
1632 if (hcd
->state
!= HC_STATE_RUNNING
)
1635 dum
= hcd_to_dummy (hcd
);
1636 spin_lock_irqsave (&dum
->lock
, flags
);
1638 case ClearHubFeature
:
1640 case ClearPortFeature
:
1642 case USB_PORT_FEAT_SUSPEND
:
1643 if (dum
->port_status
& USB_PORT_STAT_SUSPEND
) {
1644 /* 20msec resume signaling */
1646 dum
->re_timeout
= jiffies
+
1647 msecs_to_jiffies(20);
1650 case USB_PORT_FEAT_POWER
:
1651 if (dum
->port_status
& USB_PORT_STAT_POWER
)
1652 dev_dbg (dummy_dev(dum
), "power-off\n");
1655 dum
->port_status
&= ~(1 << wValue
);
1656 set_link_state (dum
);
1659 case GetHubDescriptor
:
1660 hub_descriptor ((struct usb_hub_descriptor
*) buf
);
1663 *(__le32
*) buf
= __constant_cpu_to_le32 (0);
1669 /* whoever resets or resumes must GetPortStatus to
1672 if (dum
->resuming
&&
1673 time_after_eq (jiffies
, dum
->re_timeout
)) {
1674 dum
->port_status
|= (USB_PORT_STAT_C_SUSPEND
<< 16);
1675 dum
->port_status
&= ~USB_PORT_STAT_SUSPEND
;
1677 if ((dum
->port_status
& USB_PORT_STAT_RESET
) != 0 &&
1678 time_after_eq (jiffies
, dum
->re_timeout
)) {
1679 dum
->port_status
|= (USB_PORT_STAT_C_RESET
<< 16);
1680 dum
->port_status
&= ~USB_PORT_STAT_RESET
;
1682 dum
->port_status
|= USB_PORT_STAT_ENABLE
;
1683 /* give it the best speed we agree on */
1684 dum
->gadget
.speed
= dum
->driver
->speed
;
1685 dum
->gadget
.ep0
->maxpacket
= 64;
1686 switch (dum
->gadget
.speed
) {
1687 case USB_SPEED_HIGH
:
1689 USB_PORT_STAT_HIGH_SPEED
;
1692 dum
->gadget
.ep0
->maxpacket
= 8;
1694 USB_PORT_STAT_LOW_SPEED
;
1697 dum
->gadget
.speed
= USB_SPEED_FULL
;
1702 set_link_state (dum
);
1703 ((__le16
*) buf
)[0] = cpu_to_le16 (dum
->port_status
);
1704 ((__le16
*) buf
)[1] = cpu_to_le16 (dum
->port_status
>> 16);
1709 case SetPortFeature
:
1711 case USB_PORT_FEAT_SUSPEND
:
1713 dum
->port_status
|= USB_PORT_STAT_SUSPEND
;
1715 /* HNP would happen here; for now we
1716 * assume b_bus_req is always true.
1718 set_link_state (dum
);
1719 if (((1 << USB_DEVICE_B_HNP_ENABLE
)
1720 & dum
->devstatus
) != 0)
1721 dev_dbg (dummy_dev(dum
),
1725 case USB_PORT_FEAT_POWER
:
1726 dum
->port_status
|= USB_PORT_STAT_POWER
;
1727 set_link_state (dum
);
1729 case USB_PORT_FEAT_RESET
:
1730 /* if it's already enabled, disable */
1731 dum
->port_status
&= ~(USB_PORT_STAT_ENABLE
1732 | USB_PORT_STAT_LOW_SPEED
1733 | USB_PORT_STAT_HIGH_SPEED
);
1735 /* 50msec reset signaling */
1736 dum
->re_timeout
= jiffies
+ msecs_to_jiffies(50);
1739 if ((dum
->port_status
& USB_PORT_STAT_POWER
) != 0) {
1740 dum
->port_status
|= (1 << wValue
);
1741 set_link_state (dum
);
1747 dev_dbg (dummy_dev(dum
),
1748 "hub control req%04x v%04x i%04x l%d\n",
1749 typeReq
, wValue
, wIndex
, wLength
);
1751 /* "protocol stall" on error */
1754 spin_unlock_irqrestore (&dum
->lock
, flags
);
1756 if ((dum
->port_status
& PORT_C_MASK
) != 0)
1757 usb_hcd_poll_rh_status (hcd
);
1761 static int dummy_hub_suspend (struct usb_hcd
*hcd
)
1763 struct dummy
*dum
= hcd_to_dummy (hcd
);
1765 spin_lock_irq (&dum
->lock
);
1766 dum
->rh_state
= DUMMY_RH_SUSPENDED
;
1767 set_link_state (dum
);
1768 spin_unlock_irq (&dum
->lock
);
1772 static int dummy_hub_resume (struct usb_hcd
*hcd
)
1774 struct dummy
*dum
= hcd_to_dummy (hcd
);
1776 spin_lock_irq (&dum
->lock
);
1777 dum
->rh_state
= DUMMY_RH_RUNNING
;
1778 set_link_state (dum
);
1779 if (!list_empty(&dum
->urbp_list
))
1780 mod_timer (&dum
->timer
, jiffies
);
1781 spin_unlock_irq (&dum
->lock
);
1785 /*-------------------------------------------------------------------------*/
1787 static inline ssize_t
1788 show_urb (char *buf
, size_t size
, struct urb
*urb
)
1790 int ep
= usb_pipeendpoint (urb
->pipe
);
1792 return snprintf (buf
, size
,
1793 "urb/%p %s ep%d%s%s len %d/%d\n",
1796 switch (urb
->dev
->speed
) {
1797 case USB_SPEED_LOW
: s
= "ls"; break;
1798 case USB_SPEED_FULL
: s
= "fs"; break;
1799 case USB_SPEED_HIGH
: s
= "hs"; break;
1800 default: s
= "?"; break;
1802 ep
, ep
? (usb_pipein (urb
->pipe
) ? "in" : "out") : "",
1804 switch (usb_pipetype (urb
->pipe
)) { \
1805 case PIPE_CONTROL
: s
= ""; break; \
1806 case PIPE_BULK
: s
= "-bulk"; break; \
1807 case PIPE_INTERRUPT
: s
= "-int"; break; \
1808 default: s
= "-iso"; break; \
1810 urb
->actual_length
, urb
->transfer_buffer_length
);
1814 show_urbs (struct device
*dev
, struct device_attribute
*attr
, char *buf
)
1816 struct usb_hcd
*hcd
= dev_get_drvdata (dev
);
1817 struct dummy
*dum
= hcd_to_dummy (hcd
);
1820 unsigned long flags
;
1822 spin_lock_irqsave (&dum
->lock
, flags
);
1823 list_for_each_entry (urbp
, &dum
->urbp_list
, urbp_list
) {
1826 temp
= show_urb (buf
, PAGE_SIZE
- size
, urbp
->urb
);
1830 spin_unlock_irqrestore (&dum
->lock
, flags
);
1834 static DEVICE_ATTR (urbs
, S_IRUGO
, show_urbs
, NULL
);
1836 static int dummy_start (struct usb_hcd
*hcd
)
1840 dum
= hcd_to_dummy (hcd
);
1843 * MASTER side init ... we emulate a root hub that'll only ever
1844 * talk to one device (the slave side). Also appears in sysfs,
1845 * just like more familiar pci-based HCDs.
1847 spin_lock_init (&dum
->lock
);
1848 init_timer (&dum
->timer
);
1849 dum
->timer
.function
= dummy_timer
;
1850 dum
->timer
.data
= (unsigned long) dum
;
1851 dum
->rh_state
= DUMMY_RH_RUNNING
;
1853 INIT_LIST_HEAD (&dum
->urbp_list
);
1855 /* only show a low-power port: just 8mA */
1856 hcd
->power_budget
= 8;
1857 hcd
->state
= HC_STATE_RUNNING
;
1858 hcd
->uses_new_polling
= 1;
1860 #ifdef CONFIG_USB_OTG
1861 hcd
->self
.otg_port
= 1;
1864 /* FIXME 'urbs' should be a per-device thing, maybe in usbcore */
1865 device_create_file (dummy_dev(dum
), &dev_attr_urbs
);
1869 static void dummy_stop (struct usb_hcd
*hcd
)
1873 dum
= hcd_to_dummy (hcd
);
1875 device_remove_file (dummy_dev(dum
), &dev_attr_urbs
);
1876 usb_gadget_unregister_driver (dum
->driver
);
1877 dev_info (dummy_dev(dum
), "stopped\n");
1880 /*-------------------------------------------------------------------------*/
1882 static int dummy_h_get_frame (struct usb_hcd
*hcd
)
1884 return dummy_g_get_frame (NULL
);
1887 static const struct hc_driver dummy_hcd
= {
1888 .description
= (char *) driver_name
,
1889 .product_desc
= "Dummy host controller",
1890 .hcd_priv_size
= sizeof(struct dummy
),
1894 .start
= dummy_start
,
1897 .urb_enqueue
= dummy_urb_enqueue
,
1898 .urb_dequeue
= dummy_urb_dequeue
,
1900 .get_frame_number
= dummy_h_get_frame
,
1902 .hub_status_data
= dummy_hub_status
,
1903 .hub_control
= dummy_hub_control
,
1904 .hub_suspend
= dummy_hub_suspend
,
1905 .hub_resume
= dummy_hub_resume
,
1908 static int dummy_hcd_probe (struct device
*dev
)
1910 struct usb_hcd
*hcd
;
1913 dev_info (dev
, "%s, driver " DRIVER_VERSION
"\n", driver_desc
);
1915 hcd
= usb_create_hcd (&dummy_hcd
, dev
, dev
->bus_id
);
1918 the_controller
= hcd_to_dummy (hcd
);
1920 retval
= usb_add_hcd(hcd
, 0, 0);
1923 the_controller
= NULL
;
1928 static int dummy_hcd_remove (struct device
*dev
)
1930 struct usb_hcd
*hcd
;
1932 hcd
= dev_get_drvdata (dev
);
1933 usb_remove_hcd (hcd
);
1935 the_controller
= NULL
;
1939 static int dummy_hcd_suspend (struct device
*dev
, pm_message_t state
,
1942 struct usb_hcd
*hcd
;
1944 if (level
!= SUSPEND_DISABLE
)
1947 dev_dbg (dev
, "%s\n", __FUNCTION__
);
1948 hcd
= dev_get_drvdata (dev
);
1950 #ifndef CONFIG_USB_SUSPEND
1951 /* Otherwise this would never happen */
1952 usb_lock_device (hcd
->self
.root_hub
);
1953 dummy_hub_suspend (hcd
);
1954 usb_unlock_device (hcd
->self
.root_hub
);
1957 hcd
->state
= HC_STATE_SUSPENDED
;
1961 static int dummy_hcd_resume (struct device
*dev
, u32 level
)
1963 struct usb_hcd
*hcd
;
1965 if (level
!= RESUME_ENABLE
)
1968 dev_dbg (dev
, "%s\n", __FUNCTION__
);
1969 hcd
= dev_get_drvdata (dev
);
1970 hcd
->state
= HC_STATE_RUNNING
;
1972 #ifndef CONFIG_USB_SUSPEND
1973 /* Otherwise this would never happen */
1974 usb_lock_device (hcd
->self
.root_hub
);
1975 dummy_hub_resume (hcd
);
1976 usb_unlock_device (hcd
->self
.root_hub
);
1979 usb_hcd_poll_rh_status (hcd
);
1983 static struct device_driver dummy_hcd_driver
= {
1984 .name
= (char *) driver_name
,
1985 .bus
= &platform_bus_type
,
1986 .probe
= dummy_hcd_probe
,
1987 .remove
= dummy_hcd_remove
,
1988 .suspend
= dummy_hcd_suspend
,
1989 .resume
= dummy_hcd_resume
,
1992 /*-------------------------------------------------------------------------*/
1994 /* These don't need to do anything because the pdev structures are
1995 * statically allocated. */
1997 dummy_udc_release (struct device
*dev
) {}
2000 dummy_hcd_release (struct device
*dev
) {}
2002 static struct platform_device the_udc_pdev
= {
2003 .name
= (char *) gadget_name
,
2006 .release
= dummy_udc_release
,
2010 static struct platform_device the_hcd_pdev
= {
2011 .name
= (char *) driver_name
,
2014 .release
= dummy_hcd_release
,
2018 static int __init
init (void)
2022 if (usb_disabled ())
2025 retval
= driver_register (&dummy_hcd_driver
);
2029 retval
= driver_register (&dummy_udc_driver
);
2031 goto err_register_udc_driver
;
2033 retval
= platform_device_register (&the_hcd_pdev
);
2035 goto err_register_hcd
;
2037 retval
= platform_device_register (&the_udc_pdev
);
2039 goto err_register_udc
;
2043 platform_device_unregister (&the_hcd_pdev
);
2045 driver_unregister (&dummy_udc_driver
);
2046 err_register_udc_driver
:
2047 driver_unregister (&dummy_hcd_driver
);
2052 static void __exit
cleanup (void)
2054 platform_device_unregister (&the_udc_pdev
);
2055 platform_device_unregister (&the_hcd_pdev
);
2056 driver_unregister (&dummy_udc_driver
);
2057 driver_unregister (&dummy_hcd_driver
);
2059 module_exit (cleanup
);