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/module.h>
40 #include <linux/kernel.h>
41 #include <linux/delay.h>
42 #include <linux/ioport.h>
43 #include <linux/sched.h>
44 #include <linux/slab.h>
45 #include <linux/smp_lock.h>
46 #include <linux/errno.h>
47 #include <linux/init.h>
48 #include <linux/timer.h>
49 #include <linux/list.h>
50 #include <linux/interrupt.h>
51 #include <linux/platform_device.h>
52 #include <linux/usb.h>
53 #include <linux/usb_gadget.h>
55 #include <asm/byteorder.h>
58 #include <asm/system.h>
59 #include <asm/unaligned.h>
62 #include "../core/hcd.h"
65 #define DRIVER_DESC "USB Host+Gadget Emulator"
66 #define DRIVER_VERSION "02 May 2005"
68 static const char driver_name [] = "dummy_hcd";
69 static const char driver_desc [] = "USB Host+Gadget Emulator";
71 static const char gadget_name [] = "dummy_udc";
73 MODULE_DESCRIPTION (DRIVER_DESC);
74 MODULE_AUTHOR ("David Brownell");
75 MODULE_LICENSE ("GPL");
77 /*-------------------------------------------------------------------------*/
79 /* gadget side driver data structres */
81 struct list_head queue;
82 unsigned long last_io; /* jiffies timestamp */
83 struct usb_gadget *gadget;
84 const struct usb_endpoint_descriptor *desc;
87 unsigned already_seen : 1;
88 unsigned setup_stage : 1;
91 struct dummy_request {
92 struct list_head queue; /* ep's requests */
93 struct usb_request req;
96 static inline struct dummy_ep *usb_ep_to_dummy_ep (struct usb_ep *_ep)
98 return container_of (_ep, struct dummy_ep, ep);
101 static inline struct dummy_request *usb_request_to_dummy_request
102 (struct usb_request *_req)
104 return container_of (_req, struct dummy_request, req);
107 /*-------------------------------------------------------------------------*/
110 * Every device has ep0 for control requests, plus up to 30 more endpoints,
111 * in one of two types:
113 * - Configurable: direction (in/out), type (bulk, iso, etc), and endpoint
114 * number can be changed. Names like "ep-a" are used for this type.
116 * - Fixed Function: in other cases. some characteristics may be mutable;
117 * that'd be hardware-specific. Names like "ep12out-bulk" are used.
119 * Gadget drivers are responsible for not setting up conflicting endpoint
120 * configurations, illegal or unsupported packet lengths, and so on.
123 static const char ep0name [] = "ep0";
125 static const char *const ep_name [] = {
126 ep0name, /* everyone has ep0 */
128 /* act like a net2280: high speed, six configurable endpoints */
129 "ep-a", "ep-b", "ep-c", "ep-d", "ep-e", "ep-f",
131 /* or like pxa250: fifteen fixed function endpoints */
132 "ep1in-bulk", "ep2out-bulk", "ep3in-iso", "ep4out-iso", "ep5in-int",
133 "ep6in-bulk", "ep7out-bulk", "ep8in-iso", "ep9out-iso", "ep10in-int",
134 "ep11in-bulk", "ep12out-bulk", "ep13in-iso", "ep14out-iso",
137 /* or like sa1100: two fixed function endpoints */
138 "ep1out-bulk", "ep2in-bulk",
140 #define DUMMY_ENDPOINTS ARRAY_SIZE(ep_name)
142 /*-------------------------------------------------------------------------*/
148 struct list_head urbp_list;
152 enum dummy_rh_state {
162 * SLAVE/GADGET side support
164 struct dummy_ep ep [DUMMY_ENDPOINTS];
166 struct usb_gadget gadget;
167 struct usb_gadget_driver *driver;
168 struct dummy_request fifo_req;
169 u8 fifo_buf [FIFO_SIZE];
171 unsigned udc_suspended:1;
174 unsigned old_active:1;
177 * MASTER/HOST side support
179 enum dummy_rh_state rh_state;
180 struct timer_list timer;
184 unsigned long re_timeout;
186 struct usb_device *udev;
187 struct list_head urbp_list;
190 static inline struct dummy *hcd_to_dummy (struct usb_hcd *hcd)
192 return (struct dummy *) (hcd->hcd_priv);
195 static inline struct usb_hcd *dummy_to_hcd (struct dummy *dum)
197 return container_of((void *) dum, struct usb_hcd, hcd_priv);
200 static inline struct device *dummy_dev (struct dummy *dum)
202 return dummy_to_hcd(dum)->self.controller;
205 static inline struct device *udc_dev (struct dummy *dum)
207 return dum->gadget.dev.parent;
210 static inline struct dummy *ep_to_dummy (struct dummy_ep *ep)
212 return container_of (ep->gadget, struct dummy, gadget);
215 static inline struct dummy *gadget_to_dummy (struct usb_gadget *gadget)
217 return container_of (gadget, struct dummy, gadget);
220 static inline struct dummy *gadget_dev_to_dummy (struct device *dev)
222 return container_of (dev, struct dummy, gadget.dev);
225 static struct dummy *the_controller;
227 /*-------------------------------------------------------------------------*/
229 /* SLAVE/GADGET SIDE UTILITY ROUTINES */
231 /* called with spinlock held */
232 static void nuke (struct dummy *dum, struct dummy_ep *ep)
234 while (!list_empty (&ep->queue)) {
235 struct dummy_request *req;
237 req = list_entry (ep->queue.next, struct dummy_request, queue);
238 list_del_init (&req->queue);
239 req->req.status = -ESHUTDOWN;
241 spin_unlock (&dum->lock);
242 req->req.complete (&ep->ep, &req->req);
243 spin_lock (&dum->lock);
247 /* caller must hold lock */
249 stop_activity (struct dummy *dum)
253 /* prevent any more requests */
256 /* The timer is left running so that outstanding URBs can fail */
258 /* nuke any pending requests first, so driver i/o is quiesced */
259 list_for_each_entry (ep, &dum->gadget.ep_list, ep.ep_list)
262 /* driver now does any non-usb quiescing necessary */
265 /* caller must hold lock */
267 set_link_state (struct dummy *dum)
270 if ((dum->port_status & USB_PORT_STAT_POWER) == 0)
271 dum->port_status = 0;
273 /* UDC suspend must cause a disconnect */
274 else if (!dum->pullup || dum->udc_suspended) {
275 dum->port_status &= ~(USB_PORT_STAT_CONNECTION |
276 USB_PORT_STAT_ENABLE |
277 USB_PORT_STAT_LOW_SPEED |
278 USB_PORT_STAT_HIGH_SPEED |
279 USB_PORT_STAT_SUSPEND);
280 if ((dum->old_status & USB_PORT_STAT_CONNECTION) != 0)
281 dum->port_status |= (USB_PORT_STAT_C_CONNECTION << 16);
283 dum->port_status |= USB_PORT_STAT_CONNECTION;
284 if ((dum->old_status & USB_PORT_STAT_CONNECTION) == 0)
285 dum->port_status |= (USB_PORT_STAT_C_CONNECTION << 16);
286 if ((dum->port_status & USB_PORT_STAT_ENABLE) == 0)
287 dum->port_status &= ~USB_PORT_STAT_SUSPEND;
288 else if ((dum->port_status & USB_PORT_STAT_SUSPEND) == 0 &&
289 dum->rh_state != DUMMY_RH_SUSPENDED)
293 if ((dum->port_status & USB_PORT_STAT_ENABLE) == 0 || dum->active)
296 if ((dum->port_status & USB_PORT_STAT_CONNECTION) == 0 ||
297 (dum->port_status & USB_PORT_STAT_RESET) != 0) {
298 if ((dum->old_status & USB_PORT_STAT_CONNECTION) != 0 &&
299 (dum->old_status & USB_PORT_STAT_RESET) == 0 &&
302 spin_unlock (&dum->lock);
303 dum->driver->disconnect (&dum->gadget);
304 spin_lock (&dum->lock);
306 } else if (dum->active != dum->old_active) {
307 if (dum->old_active && dum->driver->suspend) {
308 spin_unlock (&dum->lock);
309 dum->driver->suspend (&dum->gadget);
310 spin_lock (&dum->lock);
311 } else if (!dum->old_active && dum->driver->resume) {
312 spin_unlock (&dum->lock);
313 dum->driver->resume (&dum->gadget);
314 spin_lock (&dum->lock);
318 dum->old_status = dum->port_status;
319 dum->old_active = dum->active;
322 /*-------------------------------------------------------------------------*/
324 /* SLAVE/GADGET SIDE DRIVER
326 * This only tracks gadget state. All the work is done when the host
327 * side tries some (emulated) i/o operation. Real device controller
328 * drivers would do real i/o using dma, fifos, irqs, timers, etc.
331 #define is_enabled(dum) \
332 (dum->port_status & USB_PORT_STAT_ENABLE)
335 dummy_enable (struct usb_ep *_ep, const struct usb_endpoint_descriptor *desc)
342 ep = usb_ep_to_dummy_ep (_ep);
343 if (!_ep || !desc || ep->desc || _ep->name == ep0name
344 || desc->bDescriptorType != USB_DT_ENDPOINT)
346 dum = ep_to_dummy (ep);
347 if (!dum->driver || !is_enabled (dum))
349 max = le16_to_cpu(desc->wMaxPacketSize) & 0x3ff;
351 /* drivers must not request bad settings, since lower levels
352 * (hardware or its drivers) may not check. some endpoints
353 * can't do iso, many have maxpacket limitations, etc.
355 * since this "hardware" driver is here to help debugging, we
356 * have some extra sanity checks. (there could be more though,
357 * especially for "ep9out" style fixed function ones.)
360 switch (desc->bmAttributes & 0x03) {
361 case USB_ENDPOINT_XFER_BULK:
362 if (strstr (ep->ep.name, "-iso")
363 || strstr (ep->ep.name, "-int")) {
366 switch (dum->gadget.speed) {
370 /* conserve return statements */
373 case 8: case 16: case 32: case 64:
374 /* we'll fake any legal size */
382 case USB_ENDPOINT_XFER_INT:
383 if (strstr (ep->ep.name, "-iso")) /* bulk is ok */
385 /* real hardware might not handle all packet sizes */
386 switch (dum->gadget.speed) {
390 /* save a return statement */
394 /* save a return statement */
401 case USB_ENDPOINT_XFER_ISOC:
402 if (strstr (ep->ep.name, "-bulk")
403 || strstr (ep->ep.name, "-int"))
405 /* real hardware might not handle all packet sizes */
406 switch (dum->gadget.speed) {
410 /* save a return statement */
414 /* save a return statement */
420 /* few chips support control except on ep0 */
424 _ep->maxpacket = max;
427 dev_dbg (udc_dev(dum), "enabled %s (ep%d%s-%s) maxpacket %d\n",
429 desc->bEndpointAddress & 0x0f,
430 (desc->bEndpointAddress & USB_DIR_IN) ? "in" : "out",
432 switch (desc->bmAttributes & 0x03) {
433 case USB_ENDPOINT_XFER_BULK: val = "bulk"; break;
434 case USB_ENDPOINT_XFER_ISOC: val = "iso"; break;
435 case USB_ENDPOINT_XFER_INT: val = "intr"; break;
436 default: val = "ctrl"; break;
440 /* at this point real hardware should be NAKing transfers
441 * to that endpoint, until a buffer is queued to it.
448 static int dummy_disable (struct usb_ep *_ep)
455 ep = usb_ep_to_dummy_ep (_ep);
456 if (!_ep || !ep->desc || _ep->name == ep0name)
458 dum = ep_to_dummy (ep);
460 spin_lock_irqsave (&dum->lock, flags);
464 spin_unlock_irqrestore (&dum->lock, flags);
466 dev_dbg (udc_dev(dum), "disabled %s\n", _ep->name);
470 static struct usb_request *
471 dummy_alloc_request (struct usb_ep *_ep, gfp_t mem_flags)
474 struct dummy_request *req;
478 ep = usb_ep_to_dummy_ep (_ep);
480 req = kzalloc(sizeof(*req), mem_flags);
483 INIT_LIST_HEAD (&req->queue);
488 dummy_free_request (struct usb_ep *_ep, struct usb_request *_req)
491 struct dummy_request *req;
493 ep = usb_ep_to_dummy_ep (_ep);
494 if (!ep || !_req || (!ep->desc && _ep->name != ep0name))
497 req = usb_request_to_dummy_request (_req);
498 WARN_ON (!list_empty (&req->queue));
513 ep = usb_ep_to_dummy_ep (_ep);
514 dum = ep_to_dummy (ep);
518 retval = kmalloc (bytes, mem_flags);
519 *dma = (dma_addr_t) retval;
535 fifo_complete (struct usb_ep *ep, struct usb_request *req)
540 dummy_queue (struct usb_ep *_ep, struct usb_request *_req,
544 struct dummy_request *req;
548 req = usb_request_to_dummy_request (_req);
549 if (!_req || !list_empty (&req->queue) || !_req->complete)
552 ep = usb_ep_to_dummy_ep (_ep);
553 if (!_ep || (!ep->desc && _ep->name != ep0name))
556 dum = ep_to_dummy (ep);
557 if (!dum->driver || !is_enabled (dum))
561 dev_dbg (udc_dev(dum), "ep %p queue req %p to %s, len %d buf %p\n",
562 ep, _req, _ep->name, _req->length, _req->buf);
565 _req->status = -EINPROGRESS;
567 spin_lock_irqsave (&dum->lock, flags);
569 /* implement an emulated single-request FIFO */
570 if (ep->desc && (ep->desc->bEndpointAddress & USB_DIR_IN) &&
571 list_empty (&dum->fifo_req.queue) &&
572 list_empty (&ep->queue) &&
573 _req->length <= FIFO_SIZE) {
574 req = &dum->fifo_req;
576 req->req.buf = dum->fifo_buf;
577 memcpy (dum->fifo_buf, _req->buf, _req->length);
578 req->req.context = dum;
579 req->req.complete = fifo_complete;
581 spin_unlock (&dum->lock);
582 _req->actual = _req->length;
584 _req->complete (_ep, _req);
585 spin_lock (&dum->lock);
587 list_add_tail (&req->queue, &ep->queue);
588 spin_unlock_irqrestore (&dum->lock, flags);
590 /* real hardware would likely enable transfers here, in case
591 * it'd been left NAKing.
596 static int dummy_dequeue (struct usb_ep *_ep, struct usb_request *_req)
600 int retval = -EINVAL;
602 struct dummy_request *req = NULL;
606 ep = usb_ep_to_dummy_ep (_ep);
607 dum = ep_to_dummy (ep);
612 local_irq_save (flags);
613 spin_lock (&dum->lock);
614 list_for_each_entry (req, &ep->queue, queue) {
615 if (&req->req == _req) {
616 list_del_init (&req->queue);
617 _req->status = -ECONNRESET;
622 spin_unlock (&dum->lock);
625 dev_dbg (udc_dev(dum),
626 "dequeued req %p from %s, len %d buf %p\n",
627 req, _ep->name, _req->length, _req->buf);
628 _req->complete (_ep, _req);
630 local_irq_restore (flags);
635 dummy_set_halt (struct usb_ep *_ep, int value)
642 ep = usb_ep_to_dummy_ep (_ep);
643 dum = ep_to_dummy (ep);
648 else if (ep->desc && (ep->desc->bEndpointAddress & USB_DIR_IN) &&
649 !list_empty (&ep->queue))
653 /* FIXME clear emulated data toggle too */
657 static const struct usb_ep_ops dummy_ep_ops = {
658 .enable = dummy_enable,
659 .disable = dummy_disable,
661 .alloc_request = dummy_alloc_request,
662 .free_request = dummy_free_request,
664 .alloc_buffer = dummy_alloc_buffer,
665 .free_buffer = dummy_free_buffer,
666 /* map, unmap, ... eventually hook the "generic" dma calls */
668 .queue = dummy_queue,
669 .dequeue = dummy_dequeue,
671 .set_halt = dummy_set_halt,
674 /*-------------------------------------------------------------------------*/
676 /* there are both host and device side versions of this call ... */
677 static int dummy_g_get_frame (struct usb_gadget *_gadget)
681 do_gettimeofday (&tv);
682 return tv.tv_usec / 1000;
685 static int dummy_wakeup (struct usb_gadget *_gadget)
689 dum = gadget_to_dummy (_gadget);
690 if (!(dum->devstatus & ( (1 << USB_DEVICE_B_HNP_ENABLE)
691 | (1 << USB_DEVICE_REMOTE_WAKEUP))))
693 if ((dum->port_status & USB_PORT_STAT_CONNECTION) == 0)
695 if ((dum->port_status & USB_PORT_STAT_SUSPEND) == 0 &&
696 dum->rh_state != DUMMY_RH_SUSPENDED)
699 /* FIXME: What if the root hub is suspended but the port isn't? */
701 /* hub notices our request, issues downstream resume, etc */
703 dum->re_timeout = jiffies + msecs_to_jiffies(20);
704 mod_timer (&dummy_to_hcd (dum)->rh_timer, dum->re_timeout);
708 static int dummy_set_selfpowered (struct usb_gadget *_gadget, int value)
712 dum = gadget_to_dummy (_gadget);
714 dum->devstatus |= (1 << USB_DEVICE_SELF_POWERED);
716 dum->devstatus &= ~(1 << USB_DEVICE_SELF_POWERED);
720 static int dummy_pullup (struct usb_gadget *_gadget, int value)
725 dum = gadget_to_dummy (_gadget);
726 spin_lock_irqsave (&dum->lock, flags);
727 dum->pullup = (value != 0);
728 set_link_state (dum);
729 spin_unlock_irqrestore (&dum->lock, flags);
731 usb_hcd_poll_rh_status (dummy_to_hcd (dum));
735 static const struct usb_gadget_ops dummy_ops = {
736 .get_frame = dummy_g_get_frame,
737 .wakeup = dummy_wakeup,
738 .set_selfpowered = dummy_set_selfpowered,
739 .pullup = dummy_pullup,
742 /*-------------------------------------------------------------------------*/
744 /* "function" sysfs attribute */
746 show_function (struct device *dev, struct device_attribute *attr, char *buf)
748 struct dummy *dum = gadget_dev_to_dummy (dev);
750 if (!dum->driver || !dum->driver->function)
752 return scnprintf (buf, PAGE_SIZE, "%s\n", dum->driver->function);
754 static DEVICE_ATTR (function, S_IRUGO, show_function, NULL);
756 /*-------------------------------------------------------------------------*/
759 * Driver registration/unregistration.
761 * This is basically hardware-specific; there's usually only one real USB
762 * device (not host) controller since that's how USB devices are intended
763 * to work. So most implementations of these api calls will rely on the
764 * fact that only one driver will ever bind to the hardware. But curious
765 * hardware can be built with discrete components, so the gadget API doesn't
766 * require that assumption.
768 * For this emulator, it might be convenient to create a usb slave device
769 * for each driver that registers: just add to a big root hub.
773 usb_gadget_register_driver (struct usb_gadget_driver *driver)
775 struct dummy *dum = the_controller;
782 if (!driver->bind || !driver->setup
783 || driver->speed == USB_SPEED_UNKNOWN)
787 * SLAVE side init ... the layer above hardware, which
788 * can't enumerate without help from the driver we're binding.
793 INIT_LIST_HEAD (&dum->gadget.ep_list);
794 for (i = 0; i < DUMMY_ENDPOINTS; i++) {
795 struct dummy_ep *ep = &dum->ep [i];
799 ep->ep.name = ep_name [i];
800 ep->ep.ops = &dummy_ep_ops;
801 list_add_tail (&ep->ep.ep_list, &dum->gadget.ep_list);
802 ep->halted = ep->already_seen = ep->setup_stage = 0;
803 ep->ep.maxpacket = ~0;
804 ep->last_io = jiffies;
805 ep->gadget = &dum->gadget;
807 INIT_LIST_HEAD (&ep->queue);
810 dum->gadget.ep0 = &dum->ep [0].ep;
811 dum->ep [0].ep.maxpacket = 64;
812 list_del_init (&dum->ep [0].ep.ep_list);
813 INIT_LIST_HEAD(&dum->fifo_req.queue);
815 dum->driver = driver;
816 dum->gadget.dev.driver = &driver->driver;
817 dev_dbg (udc_dev(dum), "binding gadget driver '%s'\n",
818 driver->driver.name);
819 if ((retval = driver->bind (&dum->gadget)) != 0)
820 goto err_bind_gadget;
822 driver->driver.bus = dum->gadget.dev.parent->bus;
823 if ((retval = driver_register (&driver->driver)) != 0)
825 if ((retval = device_bind_driver (&dum->gadget.dev)) != 0)
826 goto err_bind_driver;
828 /* khubd will enumerate this in a while */
829 spin_lock_irq (&dum->lock);
831 set_link_state (dum);
832 spin_unlock_irq (&dum->lock);
834 usb_hcd_poll_rh_status (dummy_to_hcd (dum));
838 driver_unregister (&driver->driver);
841 driver->unbind (&dum->gadget);
842 spin_lock_irq (&dum->lock);
844 set_link_state (dum);
845 spin_unlock_irq (&dum->lock);
848 dum->gadget.dev.driver = NULL;
851 EXPORT_SYMBOL (usb_gadget_register_driver);
854 usb_gadget_unregister_driver (struct usb_gadget_driver *driver)
856 struct dummy *dum = the_controller;
861 if (!driver || driver != dum->driver || !driver->unbind)
864 dev_dbg (udc_dev(dum), "unregister gadget driver '%s'\n",
865 driver->driver.name);
867 spin_lock_irqsave (&dum->lock, flags);
869 set_link_state (dum);
870 spin_unlock_irqrestore (&dum->lock, flags);
872 driver->unbind (&dum->gadget);
875 device_release_driver (&dum->gadget.dev);
876 driver_unregister (&driver->driver);
878 spin_lock_irqsave (&dum->lock, flags);
880 set_link_state (dum);
881 spin_unlock_irqrestore (&dum->lock, flags);
883 usb_hcd_poll_rh_status (dummy_to_hcd (dum));
886 EXPORT_SYMBOL (usb_gadget_unregister_driver);
890 /* just declare this in any driver that really need it */
891 extern int net2280_set_fifo_mode (struct usb_gadget *gadget, int mode);
893 int net2280_set_fifo_mode (struct usb_gadget *gadget, int mode)
897 EXPORT_SYMBOL (net2280_set_fifo_mode);
900 /* The gadget structure is stored inside the hcd structure and will be
901 * released along with it. */
903 dummy_gadget_release (struct device *dev)
905 struct dummy *dum = gadget_dev_to_dummy (dev);
907 usb_put_hcd (dummy_to_hcd (dum));
910 static int dummy_udc_probe (struct platform_device *pdev)
912 struct dummy *dum = the_controller;
915 dum->gadget.name = gadget_name;
916 dum->gadget.ops = &dummy_ops;
917 dum->gadget.is_dualspeed = 1;
919 /* maybe claim OTG support, though we won't complete HNP */
920 dum->gadget.is_otg = (dummy_to_hcd(dum)->self.otg_port != 0);
922 strcpy (dum->gadget.dev.bus_id, "gadget");
923 dum->gadget.dev.parent = &pdev->dev;
924 dum->gadget.dev.release = dummy_gadget_release;
925 rc = device_register (&dum->gadget.dev);
929 usb_get_hcd (dummy_to_hcd (dum));
931 platform_set_drvdata (pdev, dum);
932 rc = device_create_file (&dum->gadget.dev, &dev_attr_function);
934 device_unregister (&dum->gadget.dev);
938 static int dummy_udc_remove (struct platform_device *pdev)
940 struct dummy *dum = platform_get_drvdata (pdev);
942 platform_set_drvdata (pdev, NULL);
943 device_remove_file (&dum->gadget.dev, &dev_attr_function);
944 device_unregister (&dum->gadget.dev);
948 static int dummy_udc_suspend (struct platform_device *pdev, pm_message_t state)
950 struct dummy *dum = platform_get_drvdata(pdev);
952 dev_dbg (&pdev->dev, "%s\n", __FUNCTION__);
953 spin_lock_irq (&dum->lock);
954 dum->udc_suspended = 1;
955 set_link_state (dum);
956 spin_unlock_irq (&dum->lock);
958 pdev->dev.power.power_state = state;
959 usb_hcd_poll_rh_status (dummy_to_hcd (dum));
963 static int dummy_udc_resume (struct platform_device *pdev)
965 struct dummy *dum = platform_get_drvdata(pdev);
967 dev_dbg (&pdev->dev, "%s\n", __FUNCTION__);
968 spin_lock_irq (&dum->lock);
969 dum->udc_suspended = 0;
970 set_link_state (dum);
971 spin_unlock_irq (&dum->lock);
973 pdev->dev.power.power_state = PMSG_ON;
974 usb_hcd_poll_rh_status (dummy_to_hcd (dum));
978 static struct platform_driver dummy_udc_driver = {
979 .probe = dummy_udc_probe,
980 .remove = dummy_udc_remove,
981 .suspend = dummy_udc_suspend,
982 .resume = dummy_udc_resume,
984 .name = (char *) gadget_name,
985 .owner = THIS_MODULE,
989 /*-------------------------------------------------------------------------*/
991 /* MASTER/HOST SIDE DRIVER
993 * this uses the hcd framework to hook up to host side drivers.
994 * its root hub will only have one device, otherwise it acts like
995 * a normal host controller.
997 * when urbs are queued, they're just stuck on a list that we
998 * scan in a timer callback. that callback connects writes from
999 * the host with reads from the device, and so on, based on the
1003 static int dummy_urb_enqueue (
1004 struct usb_hcd *hcd,
1005 struct usb_host_endpoint *ep,
1011 unsigned long flags;
1013 if (!urb->transfer_buffer && urb->transfer_buffer_length)
1016 urbp = kmalloc (sizeof *urbp, mem_flags);
1021 dum = hcd_to_dummy (hcd);
1022 spin_lock_irqsave (&dum->lock, flags);
1025 dum->udev = urb->dev;
1026 usb_get_dev (dum->udev);
1027 } else if (unlikely (dum->udev != urb->dev))
1028 dev_err (dummy_dev(dum), "usb_device address has changed!\n");
1030 list_add_tail (&urbp->urbp_list, &dum->urbp_list);
1032 if (usb_pipetype (urb->pipe) == PIPE_CONTROL)
1033 urb->error_count = 1; /* mark as a new urb */
1035 /* kick the scheduler, it'll do the rest */
1036 if (!timer_pending (&dum->timer))
1037 mod_timer (&dum->timer, jiffies + 1);
1039 spin_unlock_irqrestore (&dum->lock, flags);
1043 static int dummy_urb_dequeue (struct usb_hcd *hcd, struct urb *urb)
1046 unsigned long flags;
1048 /* giveback happens automatically in timer callback,
1049 * so make sure the callback happens */
1050 dum = hcd_to_dummy (hcd);
1051 spin_lock_irqsave (&dum->lock, flags);
1052 if (dum->rh_state != DUMMY_RH_RUNNING && !list_empty(&dum->urbp_list))
1053 mod_timer (&dum->timer, jiffies);
1054 spin_unlock_irqrestore (&dum->lock, flags);
1058 static void maybe_set_status (struct urb *urb, int status)
1060 spin_lock (&urb->lock);
1061 if (urb->status == -EINPROGRESS)
1062 urb->status = status;
1063 spin_unlock (&urb->lock);
1066 /* transfer up to a frame's worth; caller must own lock */
1068 transfer (struct dummy *dum, struct urb *urb, struct dummy_ep *ep, int limit)
1070 struct dummy_request *req;
1073 /* if there's no request queued, the device is NAKing; return */
1074 list_for_each_entry (req, &ep->queue, queue) {
1075 unsigned host_len, dev_len, len;
1076 int is_short, to_host;
1079 /* 1..N packets of ep->ep.maxpacket each ... the last one
1080 * may be short (including zero length).
1082 * writer can send a zlp explicitly (length 0) or implicitly
1083 * (length mod maxpacket zero, and 'zero' flag); they always
1086 host_len = urb->transfer_buffer_length - urb->actual_length;
1087 dev_len = req->req.length - req->req.actual;
1088 len = min (host_len, dev_len);
1090 /* FIXME update emulated data toggle too */
1092 to_host = usb_pipein (urb->pipe);
1093 if (unlikely (len == 0))
1098 /* not enough bandwidth left? */
1099 if (limit < ep->ep.maxpacket && limit < len)
1101 len = min (len, (unsigned) limit);
1105 /* use an extra pass for the final short packet */
1106 if (len > ep->ep.maxpacket) {
1108 len -= (len % ep->ep.maxpacket);
1110 is_short = (len % ep->ep.maxpacket) != 0;
1112 /* else transfer packet(s) */
1113 ubuf = urb->transfer_buffer + urb->actual_length;
1114 rbuf = req->req.buf + req->req.actual;
1116 memcpy (ubuf, rbuf, len);
1118 memcpy (rbuf, ubuf, len);
1119 ep->last_io = jiffies;
1122 urb->actual_length += len;
1123 req->req.actual += len;
1126 /* short packets terminate, maybe with overflow/underflow.
1127 * it's only really an error to write too much.
1129 * partially filling a buffer optionally blocks queue advances
1130 * (so completion handlers can clean up the queue) but we don't
1131 * need to emulate such data-in-flight. so we only show part
1132 * of the URB_SHORT_NOT_OK effect: completion status.
1135 if (host_len == dev_len) {
1136 req->req.status = 0;
1137 maybe_set_status (urb, 0);
1138 } else if (to_host) {
1139 req->req.status = 0;
1140 if (dev_len > host_len)
1141 maybe_set_status (urb, -EOVERFLOW);
1143 maybe_set_status (urb,
1144 (urb->transfer_flags
1147 } else if (!to_host) {
1148 maybe_set_status (urb, 0);
1149 if (host_len > dev_len)
1150 req->req.status = -EOVERFLOW;
1152 req->req.status = 0;
1155 /* many requests terminate without a short packet */
1157 if (req->req.length == req->req.actual
1159 req->req.status = 0;
1160 if (urb->transfer_buffer_length == urb->actual_length
1161 && !(urb->transfer_flags
1162 & URB_ZERO_PACKET)) {
1163 maybe_set_status (urb, 0);
1167 /* device side completion --> continuable */
1168 if (req->req.status != -EINPROGRESS) {
1169 list_del_init (&req->queue);
1171 spin_unlock (&dum->lock);
1172 req->req.complete (&ep->ep, &req->req);
1173 spin_lock (&dum->lock);
1175 /* requests might have been unlinked... */
1179 /* host side completion --> terminate */
1180 if (urb->status != -EINPROGRESS)
1183 /* rescan to continue with any other queued i/o */
1190 static int periodic_bytes (struct dummy *dum, struct dummy_ep *ep)
1192 int limit = ep->ep.maxpacket;
1194 if (dum->gadget.speed == USB_SPEED_HIGH) {
1197 /* high bandwidth mode */
1198 tmp = le16_to_cpu(ep->desc->wMaxPacketSize);
1199 tmp = (tmp >> 11) & 0x03;
1200 tmp *= 8 /* applies to entire frame */;
1201 limit += limit * tmp;
1206 #define is_active(dum) ((dum->port_status & \
1207 (USB_PORT_STAT_CONNECTION | USB_PORT_STAT_ENABLE | \
1208 USB_PORT_STAT_SUSPEND)) \
1209 == (USB_PORT_STAT_CONNECTION | USB_PORT_STAT_ENABLE))
1211 static struct dummy_ep *find_endpoint (struct dummy *dum, u8 address)
1215 if (!is_active (dum))
1217 if ((address & ~USB_DIR_IN) == 0)
1218 return &dum->ep [0];
1219 for (i = 1; i < DUMMY_ENDPOINTS; i++) {
1220 struct dummy_ep *ep = &dum->ep [i];
1224 if (ep->desc->bEndpointAddress == address)
1232 #define Dev_Request (USB_TYPE_STANDARD | USB_RECIP_DEVICE)
1233 #define Dev_InRequest (Dev_Request | USB_DIR_IN)
1234 #define Intf_Request (USB_TYPE_STANDARD | USB_RECIP_INTERFACE)
1235 #define Intf_InRequest (Intf_Request | USB_DIR_IN)
1236 #define Ep_Request (USB_TYPE_STANDARD | USB_RECIP_ENDPOINT)
1237 #define Ep_InRequest (Ep_Request | USB_DIR_IN)
1239 /* drive both sides of the transfers; looks like irq handlers to
1240 * both drivers except the callbacks aren't in_irq().
1242 static void dummy_timer (unsigned long _dum)
1244 struct dummy *dum = (struct dummy *) _dum;
1245 struct urbp *urbp, *tmp;
1246 unsigned long flags;
1250 /* simplistic model for one frame's bandwidth */
1251 switch (dum->gadget.speed) {
1253 total = 8/*bytes*/ * 12/*packets*/;
1255 case USB_SPEED_FULL:
1256 total = 64/*bytes*/ * 19/*packets*/;
1258 case USB_SPEED_HIGH:
1259 total = 512/*bytes*/ * 13/*packets*/ * 8/*uframes*/;
1262 dev_err (dummy_dev(dum), "bogus device speed\n");
1266 /* FIXME if HZ != 1000 this will probably misbehave ... */
1268 /* look at each urb queued by the host side driver */
1269 spin_lock_irqsave (&dum->lock, flags);
1272 dev_err (dummy_dev(dum),
1273 "timer fired with no URBs pending?\n");
1274 spin_unlock_irqrestore (&dum->lock, flags);
1278 for (i = 0; i < DUMMY_ENDPOINTS; i++) {
1281 dum->ep [i].already_seen = 0;
1285 list_for_each_entry_safe (urbp, tmp, &dum->urbp_list, urbp_list) {
1287 struct dummy_request *req;
1289 struct dummy_ep *ep = NULL;
1293 if (urb->status != -EINPROGRESS) {
1294 /* likely it was just unlinked */
1296 } else if (dum->rh_state != DUMMY_RH_RUNNING)
1298 type = usb_pipetype (urb->pipe);
1300 /* used up this frame's non-periodic bandwidth?
1301 * FIXME there's infinite bandwidth for control and
1302 * periodic transfers ... unrealistic.
1304 if (total <= 0 && type == PIPE_BULK)
1307 /* find the gadget's ep for this request (if configured) */
1308 address = usb_pipeendpoint (urb->pipe);
1309 if (usb_pipein (urb->pipe))
1310 address |= USB_DIR_IN;
1311 ep = find_endpoint(dum, address);
1313 /* set_configuration() disagreement */
1314 dev_dbg (dummy_dev(dum),
1315 "no ep configured for urb %p\n",
1317 maybe_set_status (urb, -EPROTO);
1321 if (ep->already_seen)
1323 ep->already_seen = 1;
1324 if (ep == &dum->ep [0] && urb->error_count) {
1325 ep->setup_stage = 1; /* a new urb */
1326 urb->error_count = 0;
1328 if (ep->halted && !ep->setup_stage) {
1329 /* NOTE: must not be iso! */
1330 dev_dbg (dummy_dev(dum), "ep %s halted, urb %p\n",
1332 maybe_set_status (urb, -EPIPE);
1335 /* FIXME make sure both ends agree on maxpacket */
1337 /* handle control requests */
1338 if (ep == &dum->ep [0] && ep->setup_stage) {
1339 struct usb_ctrlrequest setup;
1341 struct dummy_ep *ep2;
1345 setup = *(struct usb_ctrlrequest*) urb->setup_packet;
1346 w_index = le16_to_cpu(setup.wIndex);
1347 w_value = le16_to_cpu(setup.wValue);
1348 if (le16_to_cpu(setup.wLength) !=
1349 urb->transfer_buffer_length) {
1350 maybe_set_status (urb, -EOVERFLOW);
1354 /* paranoia, in case of stale queued data */
1355 list_for_each_entry (req, &ep->queue, queue) {
1356 list_del_init (&req->queue);
1357 req->req.status = -EOVERFLOW;
1358 dev_dbg (udc_dev(dum), "stale req = %p\n",
1361 spin_unlock (&dum->lock);
1362 req->req.complete (&ep->ep, &req->req);
1363 spin_lock (&dum->lock);
1364 ep->already_seen = 0;
1368 /* gadget driver never sees set_address or operations
1369 * on standard feature flags. some hardware doesn't
1372 ep->last_io = jiffies;
1373 ep->setup_stage = 0;
1375 switch (setup.bRequest) {
1376 case USB_REQ_SET_ADDRESS:
1377 if (setup.bRequestType != Dev_Request)
1379 dum->address = w_value;
1380 maybe_set_status (urb, 0);
1381 dev_dbg (udc_dev(dum), "set_address = %d\n",
1385 case USB_REQ_SET_FEATURE:
1386 if (setup.bRequestType == Dev_Request) {
1389 case USB_DEVICE_REMOTE_WAKEUP:
1391 case USB_DEVICE_B_HNP_ENABLE:
1392 dum->gadget.b_hnp_enable = 1;
1394 case USB_DEVICE_A_HNP_SUPPORT:
1395 dum->gadget.a_hnp_support = 1;
1397 case USB_DEVICE_A_ALT_HNP_SUPPORT:
1398 dum->gadget.a_alt_hnp_support
1402 value = -EOPNOTSUPP;
1407 maybe_set_status (urb, 0);
1410 } else if (setup.bRequestType == Ep_Request) {
1412 ep2 = find_endpoint (dum, w_index);
1414 value = -EOPNOTSUPP;
1419 maybe_set_status (urb, 0);
1422 case USB_REQ_CLEAR_FEATURE:
1423 if (setup.bRequestType == Dev_Request) {
1425 case USB_DEVICE_REMOTE_WAKEUP:
1426 dum->devstatus &= ~(1 <<
1427 USB_DEVICE_REMOTE_WAKEUP);
1429 maybe_set_status (urb, 0);
1432 value = -EOPNOTSUPP;
1435 } else if (setup.bRequestType == Ep_Request) {
1437 ep2 = find_endpoint (dum, w_index);
1439 value = -EOPNOTSUPP;
1444 maybe_set_status (urb, 0);
1447 case USB_REQ_GET_STATUS:
1448 if (setup.bRequestType == Dev_InRequest
1449 || setup.bRequestType
1451 || setup.bRequestType
1456 // device: remote wakeup, selfpowered
1457 // interface: nothing
1459 buf = (char *)urb->transfer_buffer;
1460 if (urb->transfer_buffer_length > 0) {
1461 if (setup.bRequestType ==
1463 ep2 = find_endpoint (dum, w_index);
1465 value = -EOPNOTSUPP;
1468 buf [0] = ep2->halted;
1469 } else if (setup.bRequestType ==
1476 if (urb->transfer_buffer_length > 1)
1478 urb->actual_length = min (2,
1479 urb->transfer_buffer_length);
1481 maybe_set_status (urb, 0);
1486 /* gadget driver handles all other requests. block
1487 * until setup() returns; no reentrancy issues etc.
1490 spin_unlock (&dum->lock);
1491 value = dum->driver->setup (&dum->gadget,
1493 spin_lock (&dum->lock);
1496 /* no delays (max 64KB data stage) */
1498 goto treat_control_like_bulk;
1500 /* error, see below */
1504 if (value != -EOPNOTSUPP)
1505 dev_dbg (udc_dev(dum),
1508 maybe_set_status (urb, -EPIPE);
1509 urb->actual_length = 0;
1515 /* non-control requests */
1517 switch (usb_pipetype (urb->pipe)) {
1518 case PIPE_ISOCHRONOUS:
1519 /* FIXME is it urb->interval since the last xfer?
1520 * use urb->iso_frame_desc[i].
1521 * complete whether or not ep has requests queued.
1522 * report random errors, to debug drivers.
1524 limit = max (limit, periodic_bytes (dum, ep));
1525 maybe_set_status (urb, -ENOSYS);
1528 case PIPE_INTERRUPT:
1529 /* FIXME is it urb->interval since the last xfer?
1530 * this almost certainly polls too fast.
1532 limit = max (limit, periodic_bytes (dum, ep));
1535 // case PIPE_BULK: case PIPE_CONTROL:
1537 treat_control_like_bulk:
1538 ep->last_io = jiffies;
1539 total = transfer (dum, urb, ep, limit);
1543 /* incomplete transfer? */
1544 if (urb->status == -EINPROGRESS)
1549 list_del (&urbp->urbp_list);
1552 ep->already_seen = ep->setup_stage = 0;
1554 spin_unlock (&dum->lock);
1555 usb_hcd_giveback_urb (dummy_to_hcd(dum), urb);
1556 spin_lock (&dum->lock);
1561 if (list_empty (&dum->urbp_list)) {
1562 usb_put_dev (dum->udev);
1564 } else if (dum->rh_state == DUMMY_RH_RUNNING) {
1565 /* want a 1 msec delay here */
1566 mod_timer (&dum->timer, jiffies + msecs_to_jiffies(1));
1569 spin_unlock_irqrestore (&dum->lock, flags);
1572 /*-------------------------------------------------------------------------*/
1574 #define PORT_C_MASK \
1575 ((USB_PORT_STAT_C_CONNECTION \
1576 | USB_PORT_STAT_C_ENABLE \
1577 | USB_PORT_STAT_C_SUSPEND \
1578 | USB_PORT_STAT_C_OVERCURRENT \
1579 | USB_PORT_STAT_C_RESET) << 16)
1581 static int dummy_hub_status (struct usb_hcd *hcd, char *buf)
1584 unsigned long flags;
1587 dum = hcd_to_dummy (hcd);
1589 spin_lock_irqsave (&dum->lock, flags);
1590 if (!test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags))
1593 if (dum->resuming && time_after_eq (jiffies, dum->re_timeout)) {
1594 dum->port_status |= (USB_PORT_STAT_C_SUSPEND << 16);
1595 dum->port_status &= ~USB_PORT_STAT_SUSPEND;
1596 set_link_state (dum);
1599 if ((dum->port_status & PORT_C_MASK) != 0) {
1601 dev_dbg (dummy_dev(dum), "port status 0x%08x has changes\n",
1604 if (dum->rh_state == DUMMY_RH_SUSPENDED)
1605 usb_hcd_resume_root_hub (hcd);
1608 spin_unlock_irqrestore (&dum->lock, flags);
1613 hub_descriptor (struct usb_hub_descriptor *desc)
1615 memset (desc, 0, sizeof *desc);
1616 desc->bDescriptorType = 0x29;
1617 desc->bDescLength = 9;
1618 desc->wHubCharacteristics = (__force __u16)
1619 (__constant_cpu_to_le16 (0x0001));
1620 desc->bNbrPorts = 1;
1621 desc->bitmap [0] = 0xff;
1622 desc->bitmap [1] = 0xff;
1625 static int dummy_hub_control (
1626 struct usb_hcd *hcd,
1635 unsigned long flags;
1637 if (!test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags))
1640 dum = hcd_to_dummy (hcd);
1641 spin_lock_irqsave (&dum->lock, flags);
1643 case ClearHubFeature:
1645 case ClearPortFeature:
1647 case USB_PORT_FEAT_SUSPEND:
1648 if (dum->port_status & USB_PORT_STAT_SUSPEND) {
1649 /* 20msec resume signaling */
1651 dum->re_timeout = jiffies +
1652 msecs_to_jiffies(20);
1655 case USB_PORT_FEAT_POWER:
1656 if (dum->port_status & USB_PORT_STAT_POWER)
1657 dev_dbg (dummy_dev(dum), "power-off\n");
1660 dum->port_status &= ~(1 << wValue);
1661 set_link_state (dum);
1664 case GetHubDescriptor:
1665 hub_descriptor ((struct usb_hub_descriptor *) buf);
1668 *(__le32 *) buf = __constant_cpu_to_le32 (0);
1674 /* whoever resets or resumes must GetPortStatus to
1677 if (dum->resuming &&
1678 time_after_eq (jiffies, dum->re_timeout)) {
1679 dum->port_status |= (USB_PORT_STAT_C_SUSPEND << 16);
1680 dum->port_status &= ~USB_PORT_STAT_SUSPEND;
1682 if ((dum->port_status & USB_PORT_STAT_RESET) != 0 &&
1683 time_after_eq (jiffies, dum->re_timeout)) {
1684 dum->port_status |= (USB_PORT_STAT_C_RESET << 16);
1685 dum->port_status &= ~USB_PORT_STAT_RESET;
1687 dum->port_status |= USB_PORT_STAT_ENABLE;
1688 /* give it the best speed we agree on */
1689 dum->gadget.speed = dum->driver->speed;
1690 dum->gadget.ep0->maxpacket = 64;
1691 switch (dum->gadget.speed) {
1692 case USB_SPEED_HIGH:
1694 USB_PORT_STAT_HIGH_SPEED;
1697 dum->gadget.ep0->maxpacket = 8;
1699 USB_PORT_STAT_LOW_SPEED;
1702 dum->gadget.speed = USB_SPEED_FULL;
1707 set_link_state (dum);
1708 ((__le16 *) buf)[0] = cpu_to_le16 (dum->port_status);
1709 ((__le16 *) buf)[1] = cpu_to_le16 (dum->port_status >> 16);
1714 case SetPortFeature:
1716 case USB_PORT_FEAT_SUSPEND:
1718 dum->port_status |= USB_PORT_STAT_SUSPEND;
1720 /* HNP would happen here; for now we
1721 * assume b_bus_req is always true.
1723 set_link_state (dum);
1724 if (((1 << USB_DEVICE_B_HNP_ENABLE)
1725 & dum->devstatus) != 0)
1726 dev_dbg (dummy_dev(dum),
1730 case USB_PORT_FEAT_POWER:
1731 dum->port_status |= USB_PORT_STAT_POWER;
1732 set_link_state (dum);
1734 case USB_PORT_FEAT_RESET:
1735 /* if it's already enabled, disable */
1736 dum->port_status &= ~(USB_PORT_STAT_ENABLE
1737 | USB_PORT_STAT_LOW_SPEED
1738 | USB_PORT_STAT_HIGH_SPEED);
1740 /* 50msec reset signaling */
1741 dum->re_timeout = jiffies + msecs_to_jiffies(50);
1744 if ((dum->port_status & USB_PORT_STAT_POWER) != 0) {
1745 dum->port_status |= (1 << wValue);
1746 set_link_state (dum);
1752 dev_dbg (dummy_dev(dum),
1753 "hub control req%04x v%04x i%04x l%d\n",
1754 typeReq, wValue, wIndex, wLength);
1756 /* "protocol stall" on error */
1759 spin_unlock_irqrestore (&dum->lock, flags);
1761 if ((dum->port_status & PORT_C_MASK) != 0)
1762 usb_hcd_poll_rh_status (hcd);
1766 static int dummy_bus_suspend (struct usb_hcd *hcd)
1768 struct dummy *dum = hcd_to_dummy (hcd);
1770 dev_dbg (&hcd->self.root_hub->dev, "%s\n", __FUNCTION__);
1772 spin_lock_irq (&dum->lock);
1773 dum->rh_state = DUMMY_RH_SUSPENDED;
1774 set_link_state (dum);
1775 hcd->state = HC_STATE_SUSPENDED;
1776 spin_unlock_irq (&dum->lock);
1780 static int dummy_bus_resume (struct usb_hcd *hcd)
1782 struct dummy *dum = hcd_to_dummy (hcd);
1785 dev_dbg (&hcd->self.root_hub->dev, "%s\n", __FUNCTION__);
1787 spin_lock_irq (&dum->lock);
1788 if (!test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags)) {
1789 dev_warn (&hcd->self.root_hub->dev, "HC isn't running!\n");
1792 dum->rh_state = DUMMY_RH_RUNNING;
1793 set_link_state (dum);
1794 if (!list_empty(&dum->urbp_list))
1795 mod_timer (&dum->timer, jiffies);
1796 hcd->state = HC_STATE_RUNNING;
1798 spin_unlock_irq (&dum->lock);
1802 /*-------------------------------------------------------------------------*/
1804 static inline ssize_t
1805 show_urb (char *buf, size_t size, struct urb *urb)
1807 int ep = usb_pipeendpoint (urb->pipe);
1809 return snprintf (buf, size,
1810 "urb/%p %s ep%d%s%s len %d/%d\n",
1813 switch (urb->dev->speed) {
1814 case USB_SPEED_LOW: s = "ls"; break;
1815 case USB_SPEED_FULL: s = "fs"; break;
1816 case USB_SPEED_HIGH: s = "hs"; break;
1817 default: s = "?"; break;
1819 ep, ep ? (usb_pipein (urb->pipe) ? "in" : "out") : "",
1821 switch (usb_pipetype (urb->pipe)) { \
1822 case PIPE_CONTROL: s = ""; break; \
1823 case PIPE_BULK: s = "-bulk"; break; \
1824 case PIPE_INTERRUPT: s = "-int"; break; \
1825 default: s = "-iso"; break; \
1827 urb->actual_length, urb->transfer_buffer_length);
1831 show_urbs (struct device *dev, struct device_attribute *attr, char *buf)
1833 struct usb_hcd *hcd = dev_get_drvdata (dev);
1834 struct dummy *dum = hcd_to_dummy (hcd);
1837 unsigned long flags;
1839 spin_lock_irqsave (&dum->lock, flags);
1840 list_for_each_entry (urbp, &dum->urbp_list, urbp_list) {
1843 temp = show_urb (buf, PAGE_SIZE - size, urbp->urb);
1847 spin_unlock_irqrestore (&dum->lock, flags);
1851 static DEVICE_ATTR (urbs, S_IRUGO, show_urbs, NULL);
1853 static int dummy_start (struct usb_hcd *hcd)
1857 dum = hcd_to_dummy (hcd);
1860 * MASTER side init ... we emulate a root hub that'll only ever
1861 * talk to one device (the slave side). Also appears in sysfs,
1862 * just like more familiar pci-based HCDs.
1864 spin_lock_init (&dum->lock);
1865 init_timer (&dum->timer);
1866 dum->timer.function = dummy_timer;
1867 dum->timer.data = (unsigned long) dum;
1868 dum->rh_state = DUMMY_RH_RUNNING;
1870 INIT_LIST_HEAD (&dum->urbp_list);
1872 /* only show a low-power port: just 8mA */
1873 hcd->power_budget = 8;
1874 hcd->state = HC_STATE_RUNNING;
1875 hcd->uses_new_polling = 1;
1877 #ifdef CONFIG_USB_OTG
1878 hcd->self.otg_port = 1;
1881 /* FIXME 'urbs' should be a per-device thing, maybe in usbcore */
1882 return device_create_file (dummy_dev(dum), &dev_attr_urbs);
1885 static void dummy_stop (struct usb_hcd *hcd)
1889 dum = hcd_to_dummy (hcd);
1891 device_remove_file (dummy_dev(dum), &dev_attr_urbs);
1892 usb_gadget_unregister_driver (dum->driver);
1893 dev_info (dummy_dev(dum), "stopped\n");
1896 /*-------------------------------------------------------------------------*/
1898 static int dummy_h_get_frame (struct usb_hcd *hcd)
1900 return dummy_g_get_frame (NULL);
1903 static const struct hc_driver dummy_hcd = {
1904 .description = (char *) driver_name,
1905 .product_desc = "Dummy host controller",
1906 .hcd_priv_size = sizeof(struct dummy),
1910 .start = dummy_start,
1913 .urb_enqueue = dummy_urb_enqueue,
1914 .urb_dequeue = dummy_urb_dequeue,
1916 .get_frame_number = dummy_h_get_frame,
1918 .hub_status_data = dummy_hub_status,
1919 .hub_control = dummy_hub_control,
1920 .bus_suspend = dummy_bus_suspend,
1921 .bus_resume = dummy_bus_resume,
1924 static int dummy_hcd_probe(struct platform_device *pdev)
1926 struct usb_hcd *hcd;
1929 dev_info(&pdev->dev, "%s, driver " DRIVER_VERSION "\n", driver_desc);
1931 hcd = usb_create_hcd(&dummy_hcd, &pdev->dev, pdev->dev.bus_id);
1934 the_controller = hcd_to_dummy (hcd);
1936 retval = usb_add_hcd(hcd, 0, 0);
1939 the_controller = NULL;
1944 static int dummy_hcd_remove (struct platform_device *pdev)
1946 struct usb_hcd *hcd;
1948 hcd = platform_get_drvdata (pdev);
1949 usb_remove_hcd (hcd);
1951 the_controller = NULL;
1955 static int dummy_hcd_suspend (struct platform_device *pdev, pm_message_t state)
1957 struct usb_hcd *hcd;
1961 dev_dbg (&pdev->dev, "%s\n", __FUNCTION__);
1963 hcd = platform_get_drvdata (pdev);
1964 dum = hcd_to_dummy (hcd);
1965 if (dum->rh_state == DUMMY_RH_RUNNING) {
1966 dev_warn(&pdev->dev, "Root hub isn't suspended!\n");
1969 clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
1973 static int dummy_hcd_resume (struct platform_device *pdev)
1975 struct usb_hcd *hcd;
1977 dev_dbg (&pdev->dev, "%s\n", __FUNCTION__);
1979 hcd = platform_get_drvdata (pdev);
1980 set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
1981 usb_hcd_poll_rh_status (hcd);
1985 static struct platform_driver dummy_hcd_driver = {
1986 .probe = dummy_hcd_probe,
1987 .remove = dummy_hcd_remove,
1988 .suspend = dummy_hcd_suspend,
1989 .resume = dummy_hcd_resume,
1991 .name = (char *) driver_name,
1992 .owner = THIS_MODULE,
1996 /*-------------------------------------------------------------------------*/
1998 /* These don't need to do anything because the pdev structures are
1999 * statically allocated. */
2001 dummy_udc_release (struct device *dev) {}
2004 dummy_hcd_release (struct device *dev) {}
2006 static struct platform_device the_udc_pdev = {
2007 .name = (char *) gadget_name,
2010 .release = dummy_udc_release,
2014 static struct platform_device the_hcd_pdev = {
2015 .name = (char *) driver_name,
2018 .release = dummy_hcd_release,
2022 static int __init init (void)
2026 if (usb_disabled ())
2029 retval = platform_driver_register (&dummy_hcd_driver);
2033 retval = platform_driver_register (&dummy_udc_driver);
2035 goto err_register_udc_driver;
2037 retval = platform_device_register (&the_hcd_pdev);
2039 goto err_register_hcd;
2041 retval = platform_device_register (&the_udc_pdev);
2043 goto err_register_udc;
2047 platform_device_unregister (&the_hcd_pdev);
2049 platform_driver_unregister (&dummy_udc_driver);
2050 err_register_udc_driver:
2051 platform_driver_unregister (&dummy_hcd_driver);
2056 static void __exit cleanup (void)
2058 platform_device_unregister (&the_udc_pdev);
2059 platform_device_unregister (&the_hcd_pdev);
2060 platform_driver_unregister (&dummy_udc_driver);
2061 platform_driver_unregister (&dummy_hcd_driver);
2063 module_exit (cleanup);