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.
17 * This exposes a device side "USB gadget" API, driven by requests to a
18 * Linux-USB host controller driver. USB traffic is simulated; there's
19 * no need for USB hardware. Use this with two other drivers:
21 * - Gadget driver, responding to requests (slave);
22 * - Host-side device driver, as already familiar in Linux.
24 * Having this all in one kernel can help some stages of development,
25 * bypassing some hardware (and driver) issues. UML could help too.
28 #include <linux/module.h>
29 #include <linux/kernel.h>
30 #include <linux/delay.h>
31 #include <linux/ioport.h>
32 #include <linux/slab.h>
33 #include <linux/errno.h>
34 #include <linux/init.h>
35 #include <linux/timer.h>
36 #include <linux/list.h>
37 #include <linux/interrupt.h>
38 #include <linux/platform_device.h>
39 #include <linux/usb.h>
40 #include <linux/usb/gadget.h>
41 #include <linux/usb/hcd.h>
42 #include <linux/scatterlist.h>
44 #include <asm/byteorder.h>
47 #include <asm/unaligned.h>
49 #define DRIVER_DESC "USB Host+Gadget Emulator"
50 #define DRIVER_VERSION "02 May 2005"
52 #define POWER_BUDGET 500 /* in mA; use 8 for low-power port testing */
54 static const char driver_name[] = "dummy_hcd";
55 static const char driver_desc[] = "USB Host+Gadget Emulator";
57 static const char gadget_name[] = "dummy_udc";
59 MODULE_DESCRIPTION(DRIVER_DESC);
60 MODULE_AUTHOR("David Brownell");
61 MODULE_LICENSE("GPL");
63 struct dummy_hcd_module_parameters {
69 static struct dummy_hcd_module_parameters mod_data = {
70 .is_super_speed = false,
71 .is_high_speed = true,
74 module_param_named(is_super_speed, mod_data.is_super_speed, bool, S_IRUGO);
75 MODULE_PARM_DESC(is_super_speed, "true to simulate SuperSpeed connection");
76 module_param_named(is_high_speed, mod_data.is_high_speed, bool, S_IRUGO);
77 MODULE_PARM_DESC(is_high_speed, "true to simulate HighSpeed connection");
78 module_param_named(num, mod_data.num, uint, S_IRUGO);
79 MODULE_PARM_DESC(num, "number of emulated controllers");
80 /*-------------------------------------------------------------------------*/
82 /* gadget side driver data structres */
84 struct list_head queue;
85 unsigned long last_io; /* jiffies timestamp */
86 struct usb_gadget *gadget;
87 const struct usb_endpoint_descriptor *desc;
91 unsigned already_seen:1;
92 unsigned setup_stage:1;
96 struct dummy_request {
97 struct list_head queue; /* ep's requests */
98 struct usb_request req;
101 static inline struct dummy_ep *usb_ep_to_dummy_ep(struct usb_ep *_ep)
103 return container_of(_ep, struct dummy_ep, ep);
106 static inline struct dummy_request *usb_request_to_dummy_request
107 (struct usb_request *_req)
109 return container_of(_req, struct dummy_request, req);
112 /*-------------------------------------------------------------------------*/
115 * Every device has ep0 for control requests, plus up to 30 more endpoints,
116 * in one of two types:
118 * - Configurable: direction (in/out), type (bulk, iso, etc), and endpoint
119 * number can be changed. Names like "ep-a" are used for this type.
121 * - Fixed Function: in other cases. some characteristics may be mutable;
122 * that'd be hardware-specific. Names like "ep12out-bulk" are used.
124 * Gadget drivers are responsible for not setting up conflicting endpoint
125 * configurations, illegal or unsupported packet lengths, and so on.
128 static const char ep0name[] = "ep0";
130 static const char *const ep_name[] = {
131 ep0name, /* everyone has ep0 */
133 /* act like a 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 /* and now some generic EPs so we have enough in multi config */
143 "ep3out", "ep4in", "ep5out", "ep6out", "ep7in", "ep8out", "ep9in",
144 "ep10out", "ep11out", "ep12in", "ep13out", "ep14in", "ep15out",
146 #define DUMMY_ENDPOINTS ARRAY_SIZE(ep_name)
148 /*-------------------------------------------------------------------------*/
154 struct list_head urbp_list;
155 struct sg_mapping_iter miter;
160 enum dummy_rh_state {
168 enum dummy_rh_state rh_state;
169 struct timer_list timer;
172 unsigned long re_timeout;
174 struct usb_device *udev;
175 struct list_head urbp_list;
177 u8 num_stream[30 / 2];
180 unsigned old_active:1;
188 * SLAVE/GADGET side support
190 struct dummy_ep ep[DUMMY_ENDPOINTS];
192 struct usb_gadget gadget;
193 struct usb_gadget_driver *driver;
194 struct dummy_request fifo_req;
195 u8 fifo_buf[FIFO_SIZE];
197 unsigned udc_suspended:1;
201 * MASTER/HOST side support
203 struct dummy_hcd *hs_hcd;
204 struct dummy_hcd *ss_hcd;
207 static inline struct dummy_hcd *hcd_to_dummy_hcd(struct usb_hcd *hcd)
209 return (struct dummy_hcd *) (hcd->hcd_priv);
212 static inline struct usb_hcd *dummy_hcd_to_hcd(struct dummy_hcd *dum)
214 return container_of((void *) dum, struct usb_hcd, hcd_priv);
217 static inline struct device *dummy_dev(struct dummy_hcd *dum)
219 return dummy_hcd_to_hcd(dum)->self.controller;
222 static inline struct device *udc_dev(struct dummy *dum)
224 return dum->gadget.dev.parent;
227 static inline struct dummy *ep_to_dummy(struct dummy_ep *ep)
229 return container_of(ep->gadget, struct dummy, gadget);
232 static inline struct dummy_hcd *gadget_to_dummy_hcd(struct usb_gadget *gadget)
234 struct dummy *dum = container_of(gadget, struct dummy, gadget);
235 if (dum->gadget.speed == USB_SPEED_SUPER)
241 static inline struct dummy *gadget_dev_to_dummy(struct device *dev)
243 return container_of(dev, struct dummy, gadget.dev);
246 /*-------------------------------------------------------------------------*/
248 /* SLAVE/GADGET SIDE UTILITY ROUTINES */
250 /* called with spinlock held */
251 static void nuke(struct dummy *dum, struct dummy_ep *ep)
253 while (!list_empty(&ep->queue)) {
254 struct dummy_request *req;
256 req = list_entry(ep->queue.next, struct dummy_request, queue);
257 list_del_init(&req->queue);
258 req->req.status = -ESHUTDOWN;
260 spin_unlock(&dum->lock);
261 req->req.complete(&ep->ep, &req->req);
262 spin_lock(&dum->lock);
266 /* caller must hold lock */
267 static void stop_activity(struct dummy *dum)
271 /* prevent any more requests */
274 /* The timer is left running so that outstanding URBs can fail */
276 /* nuke any pending requests first, so driver i/o is quiesced */
277 list_for_each_entry(ep, &dum->gadget.ep_list, ep.ep_list)
280 /* driver now does any non-usb quiescing necessary */
284 * set_link_state_by_speed() - Sets the current state of the link according to
286 * @dum_hcd: pointer to the dummy_hcd structure to update the link state for
288 * This function updates the port_status according to the link state and the
291 static void set_link_state_by_speed(struct dummy_hcd *dum_hcd)
293 struct dummy *dum = dum_hcd->dum;
295 if (dummy_hcd_to_hcd(dum_hcd)->speed == HCD_USB3) {
296 if ((dum_hcd->port_status & USB_SS_PORT_STAT_POWER) == 0) {
297 dum_hcd->port_status = 0;
298 } else if (!dum->pullup || dum->udc_suspended) {
299 /* UDC suspend must cause a disconnect */
300 dum_hcd->port_status &= ~(USB_PORT_STAT_CONNECTION |
301 USB_PORT_STAT_ENABLE);
302 if ((dum_hcd->old_status &
303 USB_PORT_STAT_CONNECTION) != 0)
304 dum_hcd->port_status |=
305 (USB_PORT_STAT_C_CONNECTION << 16);
307 /* device is connected and not suspended */
308 dum_hcd->port_status |= (USB_PORT_STAT_CONNECTION |
309 USB_PORT_STAT_SPEED_5GBPS) ;
310 if ((dum_hcd->old_status &
311 USB_PORT_STAT_CONNECTION) == 0)
312 dum_hcd->port_status |=
313 (USB_PORT_STAT_C_CONNECTION << 16);
314 if ((dum_hcd->port_status &
315 USB_PORT_STAT_ENABLE) == 1 &&
316 (dum_hcd->port_status &
317 USB_SS_PORT_LS_U0) == 1 &&
318 dum_hcd->rh_state != DUMMY_RH_SUSPENDED)
322 if ((dum_hcd->port_status & USB_PORT_STAT_POWER) == 0) {
323 dum_hcd->port_status = 0;
324 } else if (!dum->pullup || dum->udc_suspended) {
325 /* UDC suspend must cause a disconnect */
326 dum_hcd->port_status &= ~(USB_PORT_STAT_CONNECTION |
327 USB_PORT_STAT_ENABLE |
328 USB_PORT_STAT_LOW_SPEED |
329 USB_PORT_STAT_HIGH_SPEED |
330 USB_PORT_STAT_SUSPEND);
331 if ((dum_hcd->old_status &
332 USB_PORT_STAT_CONNECTION) != 0)
333 dum_hcd->port_status |=
334 (USB_PORT_STAT_C_CONNECTION << 16);
336 dum_hcd->port_status |= USB_PORT_STAT_CONNECTION;
337 if ((dum_hcd->old_status &
338 USB_PORT_STAT_CONNECTION) == 0)
339 dum_hcd->port_status |=
340 (USB_PORT_STAT_C_CONNECTION << 16);
341 if ((dum_hcd->port_status & USB_PORT_STAT_ENABLE) == 0)
342 dum_hcd->port_status &= ~USB_PORT_STAT_SUSPEND;
343 else if ((dum_hcd->port_status &
344 USB_PORT_STAT_SUSPEND) == 0 &&
345 dum_hcd->rh_state != DUMMY_RH_SUSPENDED)
351 /* caller must hold lock */
352 static void set_link_state(struct dummy_hcd *dum_hcd)
354 struct dummy *dum = dum_hcd->dum;
358 if ((dummy_hcd_to_hcd(dum_hcd)->speed == HCD_USB3 &&
359 dum->gadget.speed != USB_SPEED_SUPER) ||
360 (dummy_hcd_to_hcd(dum_hcd)->speed != HCD_USB3 &&
361 dum->gadget.speed == USB_SPEED_SUPER))
364 set_link_state_by_speed(dum_hcd);
366 if ((dum_hcd->port_status & USB_PORT_STAT_ENABLE) == 0 ||
368 dum_hcd->resuming = 0;
370 /* if !connected or reset */
371 if ((dum_hcd->port_status & USB_PORT_STAT_CONNECTION) == 0 ||
372 (dum_hcd->port_status & USB_PORT_STAT_RESET) != 0) {
374 * We're connected and not reset (reset occurred now),
375 * and driver attached - disconnect!
377 if ((dum_hcd->old_status & USB_PORT_STAT_CONNECTION) != 0 &&
378 (dum_hcd->old_status & USB_PORT_STAT_RESET) == 0 &&
381 spin_unlock(&dum->lock);
382 dum->driver->disconnect(&dum->gadget);
383 spin_lock(&dum->lock);
385 } else if (dum_hcd->active != dum_hcd->old_active) {
386 if (dum_hcd->old_active && dum->driver->suspend) {
387 spin_unlock(&dum->lock);
388 dum->driver->suspend(&dum->gadget);
389 spin_lock(&dum->lock);
390 } else if (!dum_hcd->old_active && dum->driver->resume) {
391 spin_unlock(&dum->lock);
392 dum->driver->resume(&dum->gadget);
393 spin_lock(&dum->lock);
397 dum_hcd->old_status = dum_hcd->port_status;
398 dum_hcd->old_active = dum_hcd->active;
401 /*-------------------------------------------------------------------------*/
403 /* SLAVE/GADGET SIDE DRIVER
405 * This only tracks gadget state. All the work is done when the host
406 * side tries some (emulated) i/o operation. Real device controller
407 * drivers would do real i/o using dma, fifos, irqs, timers, etc.
410 #define is_enabled(dum) \
411 (dum->port_status & USB_PORT_STAT_ENABLE)
413 static int dummy_enable(struct usb_ep *_ep,
414 const struct usb_endpoint_descriptor *desc)
417 struct dummy_hcd *dum_hcd;
422 ep = usb_ep_to_dummy_ep(_ep);
423 if (!_ep || !desc || ep->desc || _ep->name == ep0name
424 || desc->bDescriptorType != USB_DT_ENDPOINT)
426 dum = ep_to_dummy(ep);
430 dum_hcd = gadget_to_dummy_hcd(&dum->gadget);
431 if (!is_enabled(dum_hcd))
435 * For HS/FS devices only bits 0..10 of the wMaxPacketSize represent the
436 * maximum packet size.
437 * For SS devices the wMaxPacketSize is limited by 1024.
439 max = usb_endpoint_maxp(desc) & 0x7ff;
441 /* drivers must not request bad settings, since lower levels
442 * (hardware or its drivers) may not check. some endpoints
443 * can't do iso, many have maxpacket limitations, etc.
445 * since this "hardware" driver is here to help debugging, we
446 * have some extra sanity checks. (there could be more though,
447 * especially for "ep9out" style fixed function ones.)
450 switch (usb_endpoint_type(desc)) {
451 case USB_ENDPOINT_XFER_BULK:
452 if (strstr(ep->ep.name, "-iso")
453 || strstr(ep->ep.name, "-int")) {
456 switch (dum->gadget.speed) {
457 case USB_SPEED_SUPER:
466 if (max == 8 || max == 16 || max == 32 || max == 64)
467 /* we'll fake any legal size */
469 /* save a return statement */
474 case USB_ENDPOINT_XFER_INT:
475 if (strstr(ep->ep.name, "-iso")) /* bulk is ok */
477 /* real hardware might not handle all packet sizes */
478 switch (dum->gadget.speed) {
479 case USB_SPEED_SUPER:
483 /* save a return statement */
487 /* save a return statement */
494 case USB_ENDPOINT_XFER_ISOC:
495 if (strstr(ep->ep.name, "-bulk")
496 || strstr(ep->ep.name, "-int"))
498 /* real hardware might not handle all packet sizes */
499 switch (dum->gadget.speed) {
500 case USB_SPEED_SUPER:
504 /* save a return statement */
508 /* save a return statement */
514 /* few chips support control except on ep0 */
518 _ep->maxpacket = max;
519 if (usb_ss_max_streams(_ep->comp_desc)) {
520 if (!usb_endpoint_xfer_bulk(desc)) {
521 dev_err(udc_dev(dum), "Can't enable stream support on "
522 "non-bulk ep %s\n", _ep->name);
529 dev_dbg(udc_dev(dum), "enabled %s (ep%d%s-%s) maxpacket %d stream %s\n",
531 desc->bEndpointAddress & 0x0f,
532 (desc->bEndpointAddress & USB_DIR_IN) ? "in" : "out",
534 switch (usb_endpoint_type(desc)) {
535 case USB_ENDPOINT_XFER_BULK:
538 case USB_ENDPOINT_XFER_ISOC:
541 case USB_ENDPOINT_XFER_INT:
548 max, ep->stream_en ? "enabled" : "disabled");
550 /* at this point real hardware should be NAKing transfers
551 * to that endpoint, until a buffer is queued to it.
553 ep->halted = ep->wedged = 0;
559 static int dummy_disable(struct usb_ep *_ep)
565 ep = usb_ep_to_dummy_ep(_ep);
566 if (!_ep || !ep->desc || _ep->name == ep0name)
568 dum = ep_to_dummy(ep);
570 spin_lock_irqsave(&dum->lock, flags);
574 spin_unlock_irqrestore(&dum->lock, flags);
576 dev_dbg(udc_dev(dum), "disabled %s\n", _ep->name);
580 static struct usb_request *dummy_alloc_request(struct usb_ep *_ep,
584 struct dummy_request *req;
588 ep = usb_ep_to_dummy_ep(_ep);
590 req = kzalloc(sizeof(*req), mem_flags);
593 INIT_LIST_HEAD(&req->queue);
597 static void dummy_free_request(struct usb_ep *_ep, struct usb_request *_req)
599 struct dummy_request *req;
606 req = usb_request_to_dummy_request(_req);
607 WARN_ON(!list_empty(&req->queue));
611 static void fifo_complete(struct usb_ep *ep, struct usb_request *req)
615 static int dummy_queue(struct usb_ep *_ep, struct usb_request *_req,
619 struct dummy_request *req;
621 struct dummy_hcd *dum_hcd;
624 req = usb_request_to_dummy_request(_req);
625 if (!_req || !list_empty(&req->queue) || !_req->complete)
628 ep = usb_ep_to_dummy_ep(_ep);
629 if (!_ep || (!ep->desc && _ep->name != ep0name))
632 dum = ep_to_dummy(ep);
633 dum_hcd = gadget_to_dummy_hcd(&dum->gadget);
634 if (!dum->driver || !is_enabled(dum_hcd))
638 dev_dbg(udc_dev(dum), "ep %p queue req %p to %s, len %d buf %p\n",
639 ep, _req, _ep->name, _req->length, _req->buf);
641 _req->status = -EINPROGRESS;
643 spin_lock_irqsave(&dum->lock, flags);
645 /* implement an emulated single-request FIFO */
646 if (ep->desc && (ep->desc->bEndpointAddress & USB_DIR_IN) &&
647 list_empty(&dum->fifo_req.queue) &&
648 list_empty(&ep->queue) &&
649 _req->length <= FIFO_SIZE) {
650 req = &dum->fifo_req;
652 req->req.buf = dum->fifo_buf;
653 memcpy(dum->fifo_buf, _req->buf, _req->length);
654 req->req.context = dum;
655 req->req.complete = fifo_complete;
657 list_add_tail(&req->queue, &ep->queue);
658 spin_unlock(&dum->lock);
659 _req->actual = _req->length;
661 _req->complete(_ep, _req);
662 spin_lock(&dum->lock);
664 list_add_tail(&req->queue, &ep->queue);
665 spin_unlock_irqrestore(&dum->lock, flags);
667 /* real hardware would likely enable transfers here, in case
668 * it'd been left NAKing.
673 static int dummy_dequeue(struct usb_ep *_ep, struct usb_request *_req)
677 int retval = -EINVAL;
679 struct dummy_request *req = NULL;
683 ep = usb_ep_to_dummy_ep(_ep);
684 dum = ep_to_dummy(ep);
689 local_irq_save(flags);
690 spin_lock(&dum->lock);
691 list_for_each_entry(req, &ep->queue, queue) {
692 if (&req->req == _req) {
693 list_del_init(&req->queue);
694 _req->status = -ECONNRESET;
699 spin_unlock(&dum->lock);
702 dev_dbg(udc_dev(dum),
703 "dequeued req %p from %s, len %d buf %p\n",
704 req, _ep->name, _req->length, _req->buf);
705 _req->complete(_ep, _req);
707 local_irq_restore(flags);
712 dummy_set_halt_and_wedge(struct usb_ep *_ep, int value, int wedged)
719 ep = usb_ep_to_dummy_ep(_ep);
720 dum = ep_to_dummy(ep);
724 ep->halted = ep->wedged = 0;
725 else if (ep->desc && (ep->desc->bEndpointAddress & USB_DIR_IN) &&
726 !list_empty(&ep->queue))
733 /* FIXME clear emulated data toggle too */
738 dummy_set_halt(struct usb_ep *_ep, int value)
740 return dummy_set_halt_and_wedge(_ep, value, 0);
743 static int dummy_set_wedge(struct usb_ep *_ep)
745 if (!_ep || _ep->name == ep0name)
747 return dummy_set_halt_and_wedge(_ep, 1, 1);
750 static const struct usb_ep_ops dummy_ep_ops = {
751 .enable = dummy_enable,
752 .disable = dummy_disable,
754 .alloc_request = dummy_alloc_request,
755 .free_request = dummy_free_request,
757 .queue = dummy_queue,
758 .dequeue = dummy_dequeue,
760 .set_halt = dummy_set_halt,
761 .set_wedge = dummy_set_wedge,
764 /*-------------------------------------------------------------------------*/
766 /* there are both host and device side versions of this call ... */
767 static int dummy_g_get_frame(struct usb_gadget *_gadget)
771 do_gettimeofday(&tv);
772 return tv.tv_usec / 1000;
775 static int dummy_wakeup(struct usb_gadget *_gadget)
777 struct dummy_hcd *dum_hcd;
779 dum_hcd = gadget_to_dummy_hcd(_gadget);
780 if (!(dum_hcd->dum->devstatus & ((1 << USB_DEVICE_B_HNP_ENABLE)
781 | (1 << USB_DEVICE_REMOTE_WAKEUP))))
783 if ((dum_hcd->port_status & USB_PORT_STAT_CONNECTION) == 0)
785 if ((dum_hcd->port_status & USB_PORT_STAT_SUSPEND) == 0 &&
786 dum_hcd->rh_state != DUMMY_RH_SUSPENDED)
789 /* FIXME: What if the root hub is suspended but the port isn't? */
791 /* hub notices our request, issues downstream resume, etc */
792 dum_hcd->resuming = 1;
793 dum_hcd->re_timeout = jiffies + msecs_to_jiffies(20);
794 mod_timer(&dummy_hcd_to_hcd(dum_hcd)->rh_timer, dum_hcd->re_timeout);
798 static int dummy_set_selfpowered(struct usb_gadget *_gadget, int value)
802 dum = gadget_to_dummy_hcd(_gadget)->dum;
804 dum->devstatus |= (1 << USB_DEVICE_SELF_POWERED);
806 dum->devstatus &= ~(1 << USB_DEVICE_SELF_POWERED);
810 static void dummy_udc_update_ep0(struct dummy *dum)
812 if (dum->gadget.speed == USB_SPEED_SUPER)
813 dum->ep[0].ep.maxpacket = 9;
815 dum->ep[0].ep.maxpacket = 64;
818 static int dummy_pullup(struct usb_gadget *_gadget, int value)
820 struct dummy_hcd *dum_hcd;
824 dum = gadget_dev_to_dummy(&_gadget->dev);
826 if (value && dum->driver) {
827 if (mod_data.is_super_speed)
828 dum->gadget.speed = dum->driver->max_speed;
829 else if (mod_data.is_high_speed)
830 dum->gadget.speed = min_t(u8, USB_SPEED_HIGH,
831 dum->driver->max_speed);
833 dum->gadget.speed = USB_SPEED_FULL;
834 dummy_udc_update_ep0(dum);
836 if (dum->gadget.speed < dum->driver->max_speed)
837 dev_dbg(udc_dev(dum), "This device can perform faster"
838 " if you connect it to a %s port...\n",
839 usb_speed_string(dum->driver->max_speed));
841 dum_hcd = gadget_to_dummy_hcd(_gadget);
843 spin_lock_irqsave(&dum->lock, flags);
844 dum->pullup = (value != 0);
845 set_link_state(dum_hcd);
846 spin_unlock_irqrestore(&dum->lock, flags);
848 usb_hcd_poll_rh_status(dummy_hcd_to_hcd(dum_hcd));
852 static int dummy_udc_start(struct usb_gadget *g,
853 struct usb_gadget_driver *driver);
854 static int dummy_udc_stop(struct usb_gadget *g,
855 struct usb_gadget_driver *driver);
857 static const struct usb_gadget_ops dummy_ops = {
858 .get_frame = dummy_g_get_frame,
859 .wakeup = dummy_wakeup,
860 .set_selfpowered = dummy_set_selfpowered,
861 .pullup = dummy_pullup,
862 .udc_start = dummy_udc_start,
863 .udc_stop = dummy_udc_stop,
866 /*-------------------------------------------------------------------------*/
868 /* "function" sysfs attribute */
869 static ssize_t function_show(struct device *dev, struct device_attribute *attr,
872 struct dummy *dum = gadget_dev_to_dummy(dev);
874 if (!dum->driver || !dum->driver->function)
876 return scnprintf(buf, PAGE_SIZE, "%s\n", dum->driver->function);
878 static DEVICE_ATTR_RO(function);
880 /*-------------------------------------------------------------------------*/
883 * Driver registration/unregistration.
885 * This is basically hardware-specific; there's usually only one real USB
886 * device (not host) controller since that's how USB devices are intended
887 * to work. So most implementations of these api calls will rely on the
888 * fact that only one driver will ever bind to the hardware. But curious
889 * hardware can be built with discrete components, so the gadget API doesn't
890 * require that assumption.
892 * For this emulator, it might be convenient to create a usb slave device
893 * for each driver that registers: just add to a big root hub.
896 static int dummy_udc_start(struct usb_gadget *g,
897 struct usb_gadget_driver *driver)
899 struct dummy_hcd *dum_hcd = gadget_to_dummy_hcd(g);
900 struct dummy *dum = dum_hcd->dum;
902 if (driver->max_speed == USB_SPEED_UNKNOWN)
906 * SLAVE side init ... the layer above hardware, which
907 * can't enumerate without help from the driver we're binding.
912 dum->driver = driver;
913 dev_dbg(udc_dev(dum), "binding gadget driver '%s'\n",
914 driver->driver.name);
918 static int dummy_udc_stop(struct usb_gadget *g,
919 struct usb_gadget_driver *driver)
921 struct dummy_hcd *dum_hcd = gadget_to_dummy_hcd(g);
922 struct dummy *dum = dum_hcd->dum;
925 dev_dbg(udc_dev(dum), "unregister gadget driver '%s'\n",
926 driver->driver.name);
935 /* The gadget structure is stored inside the hcd structure and will be
936 * released along with it. */
937 static void init_dummy_udc_hw(struct dummy *dum)
941 INIT_LIST_HEAD(&dum->gadget.ep_list);
942 for (i = 0; i < DUMMY_ENDPOINTS; i++) {
943 struct dummy_ep *ep = &dum->ep[i];
947 ep->ep.name = ep_name[i];
948 ep->ep.ops = &dummy_ep_ops;
949 list_add_tail(&ep->ep.ep_list, &dum->gadget.ep_list);
950 ep->halted = ep->wedged = ep->already_seen =
952 usb_ep_set_maxpacket_limit(&ep->ep, ~0);
953 ep->ep.max_streams = 16;
954 ep->last_io = jiffies;
955 ep->gadget = &dum->gadget;
957 INIT_LIST_HEAD(&ep->queue);
960 dum->gadget.ep0 = &dum->ep[0].ep;
961 list_del_init(&dum->ep[0].ep.ep_list);
962 INIT_LIST_HEAD(&dum->fifo_req.queue);
964 #ifdef CONFIG_USB_OTG
965 dum->gadget.is_otg = 1;
969 static int dummy_udc_probe(struct platform_device *pdev)
974 dum = *((void **)dev_get_platdata(&pdev->dev));
975 dum->gadget.name = gadget_name;
976 dum->gadget.ops = &dummy_ops;
977 dum->gadget.max_speed = USB_SPEED_SUPER;
979 dum->gadget.dev.parent = &pdev->dev;
980 init_dummy_udc_hw(dum);
982 rc = usb_add_gadget_udc(&pdev->dev, &dum->gadget);
986 rc = device_create_file(&dum->gadget.dev, &dev_attr_function);
989 platform_set_drvdata(pdev, dum);
993 usb_del_gadget_udc(&dum->gadget);
998 static int dummy_udc_remove(struct platform_device *pdev)
1000 struct dummy *dum = platform_get_drvdata(pdev);
1002 device_remove_file(&dum->gadget.dev, &dev_attr_function);
1003 usb_del_gadget_udc(&dum->gadget);
1007 static void dummy_udc_pm(struct dummy *dum, struct dummy_hcd *dum_hcd,
1010 spin_lock_irq(&dum->lock);
1011 dum->udc_suspended = suspend;
1012 set_link_state(dum_hcd);
1013 spin_unlock_irq(&dum->lock);
1016 static int dummy_udc_suspend(struct platform_device *pdev, pm_message_t state)
1018 struct dummy *dum = platform_get_drvdata(pdev);
1019 struct dummy_hcd *dum_hcd = gadget_to_dummy_hcd(&dum->gadget);
1021 dev_dbg(&pdev->dev, "%s\n", __func__);
1022 dummy_udc_pm(dum, dum_hcd, 1);
1023 usb_hcd_poll_rh_status(dummy_hcd_to_hcd(dum_hcd));
1027 static int dummy_udc_resume(struct platform_device *pdev)
1029 struct dummy *dum = platform_get_drvdata(pdev);
1030 struct dummy_hcd *dum_hcd = gadget_to_dummy_hcd(&dum->gadget);
1032 dev_dbg(&pdev->dev, "%s\n", __func__);
1033 dummy_udc_pm(dum, dum_hcd, 0);
1034 usb_hcd_poll_rh_status(dummy_hcd_to_hcd(dum_hcd));
1038 static struct platform_driver dummy_udc_driver = {
1039 .probe = dummy_udc_probe,
1040 .remove = dummy_udc_remove,
1041 .suspend = dummy_udc_suspend,
1042 .resume = dummy_udc_resume,
1044 .name = (char *) gadget_name,
1045 .owner = THIS_MODULE,
1049 /*-------------------------------------------------------------------------*/
1051 static unsigned int dummy_get_ep_idx(const struct usb_endpoint_descriptor *desc)
1055 index = usb_endpoint_num(desc) << 1;
1056 if (usb_endpoint_dir_in(desc))
1061 /* MASTER/HOST SIDE DRIVER
1063 * this uses the hcd framework to hook up to host side drivers.
1064 * its root hub will only have one device, otherwise it acts like
1065 * a normal host controller.
1067 * when urbs are queued, they're just stuck on a list that we
1068 * scan in a timer callback. that callback connects writes from
1069 * the host with reads from the device, and so on, based on the
1073 static int dummy_ep_stream_en(struct dummy_hcd *dum_hcd, struct urb *urb)
1075 const struct usb_endpoint_descriptor *desc = &urb->ep->desc;
1078 if (!usb_endpoint_xfer_bulk(desc))
1081 index = dummy_get_ep_idx(desc);
1082 return (1 << index) & dum_hcd->stream_en_ep;
1086 * The max stream number is saved as a nibble so for the 30 possible endpoints
1087 * we only 15 bytes of memory. Therefore we are limited to max 16 streams (0
1088 * means we use only 1 stream). The maximum according to the spec is 16bit so
1089 * if the 16 stream limit is about to go, the array size should be incremented
1090 * to 30 elements of type u16.
1092 static int get_max_streams_for_pipe(struct dummy_hcd *dum_hcd,
1097 max_streams = dum_hcd->num_stream[usb_pipeendpoint(pipe)];
1098 if (usb_pipeout(pipe))
1106 static void set_max_streams_for_pipe(struct dummy_hcd *dum_hcd,
1107 unsigned int pipe, unsigned int streams)
1112 max_streams = dum_hcd->num_stream[usb_pipeendpoint(pipe)];
1113 if (usb_pipeout(pipe)) {
1117 max_streams &= 0xf0;
1119 max_streams |= streams;
1120 dum_hcd->num_stream[usb_pipeendpoint(pipe)] = max_streams;
1123 static int dummy_validate_stream(struct dummy_hcd *dum_hcd, struct urb *urb)
1125 unsigned int max_streams;
1128 enabled = dummy_ep_stream_en(dum_hcd, urb);
1129 if (!urb->stream_id) {
1137 max_streams = get_max_streams_for_pipe(dum_hcd,
1138 usb_pipeendpoint(urb->pipe));
1139 if (urb->stream_id > max_streams) {
1140 dev_err(dummy_dev(dum_hcd), "Stream id %d is out of range.\n",
1148 static int dummy_urb_enqueue(
1149 struct usb_hcd *hcd,
1153 struct dummy_hcd *dum_hcd;
1155 unsigned long flags;
1158 urbp = kmalloc(sizeof *urbp, mem_flags);
1162 urbp->miter_started = 0;
1164 dum_hcd = hcd_to_dummy_hcd(hcd);
1165 spin_lock_irqsave(&dum_hcd->dum->lock, flags);
1167 rc = dummy_validate_stream(dum_hcd, urb);
1173 rc = usb_hcd_link_urb_to_ep(hcd, urb);
1179 if (!dum_hcd->udev) {
1180 dum_hcd->udev = urb->dev;
1181 usb_get_dev(dum_hcd->udev);
1182 } else if (unlikely(dum_hcd->udev != urb->dev))
1183 dev_err(dummy_dev(dum_hcd), "usb_device address has changed!\n");
1185 list_add_tail(&urbp->urbp_list, &dum_hcd->urbp_list);
1187 if (usb_pipetype(urb->pipe) == PIPE_CONTROL)
1188 urb->error_count = 1; /* mark as a new urb */
1190 /* kick the scheduler, it'll do the rest */
1191 if (!timer_pending(&dum_hcd->timer))
1192 mod_timer(&dum_hcd->timer, jiffies + 1);
1195 spin_unlock_irqrestore(&dum_hcd->dum->lock, flags);
1199 static int dummy_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status)
1201 struct dummy_hcd *dum_hcd;
1202 unsigned long flags;
1205 /* giveback happens automatically in timer callback,
1206 * so make sure the callback happens */
1207 dum_hcd = hcd_to_dummy_hcd(hcd);
1208 spin_lock_irqsave(&dum_hcd->dum->lock, flags);
1210 rc = usb_hcd_check_unlink_urb(hcd, urb, status);
1211 if (!rc && dum_hcd->rh_state != DUMMY_RH_RUNNING &&
1212 !list_empty(&dum_hcd->urbp_list))
1213 mod_timer(&dum_hcd->timer, jiffies);
1215 spin_unlock_irqrestore(&dum_hcd->dum->lock, flags);
1219 static int dummy_perform_transfer(struct urb *urb, struct dummy_request *req,
1223 struct urbp *urbp = urb->hcpriv;
1225 struct sg_mapping_iter *miter = &urbp->miter;
1230 to_host = usb_pipein(urb->pipe);
1231 rbuf = req->req.buf + req->req.actual;
1233 if (!urb->num_sgs) {
1234 ubuf = urb->transfer_buffer + urb->actual_length;
1236 memcpy(ubuf, rbuf, len);
1238 memcpy(rbuf, ubuf, len);
1242 if (!urbp->miter_started) {
1243 u32 flags = SG_MITER_ATOMIC;
1246 flags |= SG_MITER_TO_SG;
1248 flags |= SG_MITER_FROM_SG;
1250 sg_miter_start(miter, urb->sg, urb->num_sgs, flags);
1251 urbp->miter_started = 1;
1253 next_sg = sg_miter_next(miter);
1254 if (next_sg == false) {
1260 this_sg = min_t(u32, len, miter->length);
1261 miter->consumed = this_sg;
1265 memcpy(ubuf, rbuf, this_sg);
1267 memcpy(rbuf, ubuf, this_sg);
1272 next_sg = sg_miter_next(miter);
1273 if (next_sg == false) {
1281 sg_miter_stop(miter);
1285 /* transfer up to a frame's worth; caller must own lock */
1286 static int transfer(struct dummy_hcd *dum_hcd, struct urb *urb,
1287 struct dummy_ep *ep, int limit, int *status)
1289 struct dummy *dum = dum_hcd->dum;
1290 struct dummy_request *req;
1293 /* if there's no request queued, the device is NAKing; return */
1294 list_for_each_entry(req, &ep->queue, queue) {
1295 unsigned host_len, dev_len, len;
1296 int is_short, to_host;
1299 if (dummy_ep_stream_en(dum_hcd, urb)) {
1300 if ((urb->stream_id != req->req.stream_id))
1304 /* 1..N packets of ep->ep.maxpacket each ... the last one
1305 * may be short (including zero length).
1307 * writer can send a zlp explicitly (length 0) or implicitly
1308 * (length mod maxpacket zero, and 'zero' flag); they always
1311 host_len = urb->transfer_buffer_length - urb->actual_length;
1312 dev_len = req->req.length - req->req.actual;
1313 len = min(host_len, dev_len);
1315 /* FIXME update emulated data toggle too */
1317 to_host = usb_pipein(urb->pipe);
1318 if (unlikely(len == 0))
1321 /* not enough bandwidth left? */
1322 if (limit < ep->ep.maxpacket && limit < len)
1324 len = min_t(unsigned, len, limit);
1328 /* use an extra pass for the final short packet */
1329 if (len > ep->ep.maxpacket) {
1331 len -= (len % ep->ep.maxpacket);
1333 is_short = (len % ep->ep.maxpacket) != 0;
1335 len = dummy_perform_transfer(urb, req, len);
1337 ep->last_io = jiffies;
1339 req->req.status = len;
1342 urb->actual_length += len;
1343 req->req.actual += len;
1347 /* short packets terminate, maybe with overflow/underflow.
1348 * it's only really an error to write too much.
1350 * partially filling a buffer optionally blocks queue advances
1351 * (so completion handlers can clean up the queue) but we don't
1352 * need to emulate such data-in-flight.
1355 if (host_len == dev_len) {
1356 req->req.status = 0;
1358 } else if (to_host) {
1359 req->req.status = 0;
1360 if (dev_len > host_len)
1361 *status = -EOVERFLOW;
1364 } else if (!to_host) {
1366 if (host_len > dev_len)
1367 req->req.status = -EOVERFLOW;
1369 req->req.status = 0;
1372 /* many requests terminate without a short packet */
1374 if (req->req.length == req->req.actual
1376 req->req.status = 0;
1377 if (urb->transfer_buffer_length == urb->actual_length
1378 && !(urb->transfer_flags
1383 /* device side completion --> continuable */
1384 if (req->req.status != -EINPROGRESS) {
1385 list_del_init(&req->queue);
1387 spin_unlock(&dum->lock);
1388 req->req.complete(&ep->ep, &req->req);
1389 spin_lock(&dum->lock);
1391 /* requests might have been unlinked... */
1395 /* host side completion --> terminate */
1396 if (*status != -EINPROGRESS)
1399 /* rescan to continue with any other queued i/o */
1406 static int periodic_bytes(struct dummy *dum, struct dummy_ep *ep)
1408 int limit = ep->ep.maxpacket;
1410 if (dum->gadget.speed == USB_SPEED_HIGH) {
1413 /* high bandwidth mode */
1414 tmp = usb_endpoint_maxp(ep->desc);
1415 tmp = (tmp >> 11) & 0x03;
1416 tmp *= 8 /* applies to entire frame */;
1417 limit += limit * tmp;
1419 if (dum->gadget.speed == USB_SPEED_SUPER) {
1420 switch (usb_endpoint_type(ep->desc)) {
1421 case USB_ENDPOINT_XFER_ISOC:
1422 /* Sec. 4.4.8.2 USB3.0 Spec */
1423 limit = 3 * 16 * 1024 * 8;
1425 case USB_ENDPOINT_XFER_INT:
1426 /* Sec. 4.4.7.2 USB3.0 Spec */
1427 limit = 3 * 1024 * 8;
1429 case USB_ENDPOINT_XFER_BULK:
1437 #define is_active(dum_hcd) ((dum_hcd->port_status & \
1438 (USB_PORT_STAT_CONNECTION | USB_PORT_STAT_ENABLE | \
1439 USB_PORT_STAT_SUSPEND)) \
1440 == (USB_PORT_STAT_CONNECTION | USB_PORT_STAT_ENABLE))
1442 static struct dummy_ep *find_endpoint(struct dummy *dum, u8 address)
1446 if (!is_active((dum->gadget.speed == USB_SPEED_SUPER ?
1447 dum->ss_hcd : dum->hs_hcd)))
1449 if ((address & ~USB_DIR_IN) == 0)
1451 for (i = 1; i < DUMMY_ENDPOINTS; i++) {
1452 struct dummy_ep *ep = &dum->ep[i];
1456 if (ep->desc->bEndpointAddress == address)
1464 #define Dev_Request (USB_TYPE_STANDARD | USB_RECIP_DEVICE)
1465 #define Dev_InRequest (Dev_Request | USB_DIR_IN)
1466 #define Intf_Request (USB_TYPE_STANDARD | USB_RECIP_INTERFACE)
1467 #define Intf_InRequest (Intf_Request | USB_DIR_IN)
1468 #define Ep_Request (USB_TYPE_STANDARD | USB_RECIP_ENDPOINT)
1469 #define Ep_InRequest (Ep_Request | USB_DIR_IN)
1473 * handle_control_request() - handles all control transfers
1474 * @dum: pointer to dummy (the_controller)
1475 * @urb: the urb request to handle
1476 * @setup: pointer to the setup data for a USB device control
1478 * @status: pointer to request handling status
1480 * Return 0 - if the request was handled
1481 * 1 - if the request wasn't handles
1482 * error code on error
1484 static int handle_control_request(struct dummy_hcd *dum_hcd, struct urb *urb,
1485 struct usb_ctrlrequest *setup,
1488 struct dummy_ep *ep2;
1489 struct dummy *dum = dum_hcd->dum;
1494 w_index = le16_to_cpu(setup->wIndex);
1495 w_value = le16_to_cpu(setup->wValue);
1496 switch (setup->bRequest) {
1497 case USB_REQ_SET_ADDRESS:
1498 if (setup->bRequestType != Dev_Request)
1500 dum->address = w_value;
1502 dev_dbg(udc_dev(dum), "set_address = %d\n",
1506 case USB_REQ_SET_FEATURE:
1507 if (setup->bRequestType == Dev_Request) {
1510 case USB_DEVICE_REMOTE_WAKEUP:
1512 case USB_DEVICE_B_HNP_ENABLE:
1513 dum->gadget.b_hnp_enable = 1;
1515 case USB_DEVICE_A_HNP_SUPPORT:
1516 dum->gadget.a_hnp_support = 1;
1518 case USB_DEVICE_A_ALT_HNP_SUPPORT:
1519 dum->gadget.a_alt_hnp_support = 1;
1521 case USB_DEVICE_U1_ENABLE:
1522 if (dummy_hcd_to_hcd(dum_hcd)->speed ==
1524 w_value = USB_DEV_STAT_U1_ENABLED;
1526 ret_val = -EOPNOTSUPP;
1528 case USB_DEVICE_U2_ENABLE:
1529 if (dummy_hcd_to_hcd(dum_hcd)->speed ==
1531 w_value = USB_DEV_STAT_U2_ENABLED;
1533 ret_val = -EOPNOTSUPP;
1535 case USB_DEVICE_LTM_ENABLE:
1536 if (dummy_hcd_to_hcd(dum_hcd)->speed ==
1538 w_value = USB_DEV_STAT_LTM_ENABLED;
1540 ret_val = -EOPNOTSUPP;
1543 ret_val = -EOPNOTSUPP;
1546 dum->devstatus |= (1 << w_value);
1549 } else if (setup->bRequestType == Ep_Request) {
1551 ep2 = find_endpoint(dum, w_index);
1552 if (!ep2 || ep2->ep.name == ep0name) {
1553 ret_val = -EOPNOTSUPP;
1561 case USB_REQ_CLEAR_FEATURE:
1562 if (setup->bRequestType == Dev_Request) {
1565 case USB_DEVICE_REMOTE_WAKEUP:
1566 w_value = USB_DEVICE_REMOTE_WAKEUP;
1568 case USB_DEVICE_U1_ENABLE:
1569 if (dummy_hcd_to_hcd(dum_hcd)->speed ==
1571 w_value = USB_DEV_STAT_U1_ENABLED;
1573 ret_val = -EOPNOTSUPP;
1575 case USB_DEVICE_U2_ENABLE:
1576 if (dummy_hcd_to_hcd(dum_hcd)->speed ==
1578 w_value = USB_DEV_STAT_U2_ENABLED;
1580 ret_val = -EOPNOTSUPP;
1582 case USB_DEVICE_LTM_ENABLE:
1583 if (dummy_hcd_to_hcd(dum_hcd)->speed ==
1585 w_value = USB_DEV_STAT_LTM_ENABLED;
1587 ret_val = -EOPNOTSUPP;
1590 ret_val = -EOPNOTSUPP;
1594 dum->devstatus &= ~(1 << w_value);
1597 } else if (setup->bRequestType == Ep_Request) {
1599 ep2 = find_endpoint(dum, w_index);
1601 ret_val = -EOPNOTSUPP;
1610 case USB_REQ_GET_STATUS:
1611 if (setup->bRequestType == Dev_InRequest
1612 || setup->bRequestType == Intf_InRequest
1613 || setup->bRequestType == Ep_InRequest) {
1616 * device: remote wakeup, selfpowered
1617 * interface: nothing
1620 buf = (char *)urb->transfer_buffer;
1621 if (urb->transfer_buffer_length > 0) {
1622 if (setup->bRequestType == Ep_InRequest) {
1623 ep2 = find_endpoint(dum, w_index);
1625 ret_val = -EOPNOTSUPP;
1628 buf[0] = ep2->halted;
1629 } else if (setup->bRequestType ==
1631 buf[0] = (u8)dum->devstatus;
1635 if (urb->transfer_buffer_length > 1)
1637 urb->actual_length = min_t(u32, 2,
1638 urb->transfer_buffer_length);
1647 /* drive both sides of the transfers; looks like irq handlers to
1648 * both drivers except the callbacks aren't in_irq().
1650 static void dummy_timer(unsigned long _dum_hcd)
1652 struct dummy_hcd *dum_hcd = (struct dummy_hcd *) _dum_hcd;
1653 struct dummy *dum = dum_hcd->dum;
1654 struct urbp *urbp, *tmp;
1655 unsigned long flags;
1659 /* simplistic model for one frame's bandwidth */
1660 switch (dum->gadget.speed) {
1662 total = 8/*bytes*/ * 12/*packets*/;
1664 case USB_SPEED_FULL:
1665 total = 64/*bytes*/ * 19/*packets*/;
1667 case USB_SPEED_HIGH:
1668 total = 512/*bytes*/ * 13/*packets*/ * 8/*uframes*/;
1670 case USB_SPEED_SUPER:
1671 /* Bus speed is 500000 bytes/ms, so use a little less */
1675 dev_err(dummy_dev(dum_hcd), "bogus device speed\n");
1679 /* FIXME if HZ != 1000 this will probably misbehave ... */
1681 /* look at each urb queued by the host side driver */
1682 spin_lock_irqsave(&dum->lock, flags);
1684 if (!dum_hcd->udev) {
1685 dev_err(dummy_dev(dum_hcd),
1686 "timer fired with no URBs pending?\n");
1687 spin_unlock_irqrestore(&dum->lock, flags);
1691 for (i = 0; i < DUMMY_ENDPOINTS; i++) {
1694 dum->ep[i].already_seen = 0;
1698 list_for_each_entry_safe(urbp, tmp, &dum_hcd->urbp_list, urbp_list) {
1700 struct dummy_request *req;
1702 struct dummy_ep *ep = NULL;
1704 int status = -EINPROGRESS;
1709 else if (dum_hcd->rh_state != DUMMY_RH_RUNNING)
1711 type = usb_pipetype(urb->pipe);
1713 /* used up this frame's non-periodic bandwidth?
1714 * FIXME there's infinite bandwidth for control and
1715 * periodic transfers ... unrealistic.
1717 if (total <= 0 && type == PIPE_BULK)
1720 /* find the gadget's ep for this request (if configured) */
1721 address = usb_pipeendpoint (urb->pipe);
1722 if (usb_pipein(urb->pipe))
1723 address |= USB_DIR_IN;
1724 ep = find_endpoint(dum, address);
1726 /* set_configuration() disagreement */
1727 dev_dbg(dummy_dev(dum_hcd),
1728 "no ep configured for urb %p\n",
1734 if (ep->already_seen)
1736 ep->already_seen = 1;
1737 if (ep == &dum->ep[0] && urb->error_count) {
1738 ep->setup_stage = 1; /* a new urb */
1739 urb->error_count = 0;
1741 if (ep->halted && !ep->setup_stage) {
1742 /* NOTE: must not be iso! */
1743 dev_dbg(dummy_dev(dum_hcd), "ep %s halted, urb %p\n",
1748 /* FIXME make sure both ends agree on maxpacket */
1750 /* handle control requests */
1751 if (ep == &dum->ep[0] && ep->setup_stage) {
1752 struct usb_ctrlrequest setup;
1755 setup = *(struct usb_ctrlrequest *) urb->setup_packet;
1756 /* paranoia, in case of stale queued data */
1757 list_for_each_entry(req, &ep->queue, queue) {
1758 list_del_init(&req->queue);
1759 req->req.status = -EOVERFLOW;
1760 dev_dbg(udc_dev(dum), "stale req = %p\n",
1763 spin_unlock(&dum->lock);
1764 req->req.complete(&ep->ep, &req->req);
1765 spin_lock(&dum->lock);
1766 ep->already_seen = 0;
1770 /* gadget driver never sees set_address or operations
1771 * on standard feature flags. some hardware doesn't
1774 ep->last_io = jiffies;
1775 ep->setup_stage = 0;
1778 value = handle_control_request(dum_hcd, urb, &setup,
1781 /* gadget driver handles all other requests. block
1782 * until setup() returns; no reentrancy issues etc.
1785 spin_unlock(&dum->lock);
1786 value = dum->driver->setup(&dum->gadget,
1788 spin_lock(&dum->lock);
1791 /* no delays (max 64KB data stage) */
1793 goto treat_control_like_bulk;
1795 /* error, see below */
1799 if (value != -EOPNOTSUPP)
1800 dev_dbg(udc_dev(dum),
1804 urb->actual_length = 0;
1810 /* non-control requests */
1812 switch (usb_pipetype(urb->pipe)) {
1813 case PIPE_ISOCHRONOUS:
1814 /* FIXME is it urb->interval since the last xfer?
1815 * use urb->iso_frame_desc[i].
1816 * complete whether or not ep has requests queued.
1817 * report random errors, to debug drivers.
1819 limit = max(limit, periodic_bytes(dum, ep));
1823 case PIPE_INTERRUPT:
1824 /* FIXME is it urb->interval since the last xfer?
1825 * this almost certainly polls too fast.
1827 limit = max(limit, periodic_bytes(dum, ep));
1831 treat_control_like_bulk:
1832 ep->last_io = jiffies;
1833 total = transfer(dum_hcd, urb, ep, limit, &status);
1837 /* incomplete transfer? */
1838 if (status == -EINPROGRESS)
1842 list_del(&urbp->urbp_list);
1845 ep->already_seen = ep->setup_stage = 0;
1847 usb_hcd_unlink_urb_from_ep(dummy_hcd_to_hcd(dum_hcd), urb);
1848 spin_unlock(&dum->lock);
1849 usb_hcd_giveback_urb(dummy_hcd_to_hcd(dum_hcd), urb, status);
1850 spin_lock(&dum->lock);
1855 if (list_empty(&dum_hcd->urbp_list)) {
1856 usb_put_dev(dum_hcd->udev);
1857 dum_hcd->udev = NULL;
1858 } else if (dum_hcd->rh_state == DUMMY_RH_RUNNING) {
1859 /* want a 1 msec delay here */
1860 mod_timer(&dum_hcd->timer, jiffies + msecs_to_jiffies(1));
1863 spin_unlock_irqrestore(&dum->lock, flags);
1866 /*-------------------------------------------------------------------------*/
1868 #define PORT_C_MASK \
1869 ((USB_PORT_STAT_C_CONNECTION \
1870 | USB_PORT_STAT_C_ENABLE \
1871 | USB_PORT_STAT_C_SUSPEND \
1872 | USB_PORT_STAT_C_OVERCURRENT \
1873 | USB_PORT_STAT_C_RESET) << 16)
1875 static int dummy_hub_status(struct usb_hcd *hcd, char *buf)
1877 struct dummy_hcd *dum_hcd;
1878 unsigned long flags;
1881 dum_hcd = hcd_to_dummy_hcd(hcd);
1883 spin_lock_irqsave(&dum_hcd->dum->lock, flags);
1884 if (!HCD_HW_ACCESSIBLE(hcd))
1887 if (dum_hcd->resuming && time_after_eq(jiffies, dum_hcd->re_timeout)) {
1888 dum_hcd->port_status |= (USB_PORT_STAT_C_SUSPEND << 16);
1889 dum_hcd->port_status &= ~USB_PORT_STAT_SUSPEND;
1890 set_link_state(dum_hcd);
1893 if ((dum_hcd->port_status & PORT_C_MASK) != 0) {
1895 dev_dbg(dummy_dev(dum_hcd), "port status 0x%08x has changes\n",
1896 dum_hcd->port_status);
1898 if (dum_hcd->rh_state == DUMMY_RH_SUSPENDED)
1899 usb_hcd_resume_root_hub(hcd);
1902 spin_unlock_irqrestore(&dum_hcd->dum->lock, flags);
1906 /* usb 3.0 root hub device descriptor */
1908 struct usb_bos_descriptor bos;
1909 struct usb_ss_cap_descriptor ss_cap;
1910 } __packed usb3_bos_desc = {
1913 .bLength = USB_DT_BOS_SIZE,
1914 .bDescriptorType = USB_DT_BOS,
1915 .wTotalLength = cpu_to_le16(sizeof(usb3_bos_desc)),
1916 .bNumDeviceCaps = 1,
1919 .bLength = USB_DT_USB_SS_CAP_SIZE,
1920 .bDescriptorType = USB_DT_DEVICE_CAPABILITY,
1921 .bDevCapabilityType = USB_SS_CAP_TYPE,
1922 .wSpeedSupported = cpu_to_le16(USB_5GBPS_OPERATION),
1923 .bFunctionalitySupport = ilog2(USB_5GBPS_OPERATION),
1928 ss_hub_descriptor(struct usb_hub_descriptor *desc)
1930 memset(desc, 0, sizeof *desc);
1931 desc->bDescriptorType = 0x2a;
1932 desc->bDescLength = 12;
1933 desc->wHubCharacteristics = cpu_to_le16(0x0001);
1934 desc->bNbrPorts = 1;
1935 desc->u.ss.bHubHdrDecLat = 0x04; /* Worst case: 0.4 micro sec*/
1936 desc->u.ss.DeviceRemovable = 0xffff;
1939 static inline void hub_descriptor(struct usb_hub_descriptor *desc)
1941 memset(desc, 0, sizeof *desc);
1942 desc->bDescriptorType = 0x29;
1943 desc->bDescLength = 9;
1944 desc->wHubCharacteristics = cpu_to_le16(0x0001);
1945 desc->bNbrPorts = 1;
1946 desc->u.hs.DeviceRemovable[0] = 0xff;
1947 desc->u.hs.DeviceRemovable[1] = 0xff;
1950 static int dummy_hub_control(
1951 struct usb_hcd *hcd,
1958 struct dummy_hcd *dum_hcd;
1960 unsigned long flags;
1962 if (!HCD_HW_ACCESSIBLE(hcd))
1965 dum_hcd = hcd_to_dummy_hcd(hcd);
1967 spin_lock_irqsave(&dum_hcd->dum->lock, flags);
1969 case ClearHubFeature:
1971 case ClearPortFeature:
1973 case USB_PORT_FEAT_SUSPEND:
1974 if (hcd->speed == HCD_USB3) {
1975 dev_dbg(dummy_dev(dum_hcd),
1976 "USB_PORT_FEAT_SUSPEND req not "
1977 "supported for USB 3.0 roothub\n");
1980 if (dum_hcd->port_status & USB_PORT_STAT_SUSPEND) {
1981 /* 20msec resume signaling */
1982 dum_hcd->resuming = 1;
1983 dum_hcd->re_timeout = jiffies +
1984 msecs_to_jiffies(20);
1987 case USB_PORT_FEAT_POWER:
1988 if (hcd->speed == HCD_USB3) {
1989 if (dum_hcd->port_status & USB_PORT_STAT_POWER)
1990 dev_dbg(dummy_dev(dum_hcd),
1993 if (dum_hcd->port_status &
1994 USB_SS_PORT_STAT_POWER)
1995 dev_dbg(dummy_dev(dum_hcd),
1999 dum_hcd->port_status &= ~(1 << wValue);
2000 set_link_state(dum_hcd);
2003 case GetHubDescriptor:
2004 if (hcd->speed == HCD_USB3 &&
2005 (wLength < USB_DT_SS_HUB_SIZE ||
2006 wValue != (USB_DT_SS_HUB << 8))) {
2007 dev_dbg(dummy_dev(dum_hcd),
2008 "Wrong hub descriptor type for "
2009 "USB 3.0 roothub.\n");
2012 if (hcd->speed == HCD_USB3)
2013 ss_hub_descriptor((struct usb_hub_descriptor *) buf);
2015 hub_descriptor((struct usb_hub_descriptor *) buf);
2018 case DeviceRequest | USB_REQ_GET_DESCRIPTOR:
2019 if (hcd->speed != HCD_USB3)
2022 if ((wValue >> 8) != USB_DT_BOS)
2025 memcpy(buf, &usb3_bos_desc, sizeof(usb3_bos_desc));
2026 retval = sizeof(usb3_bos_desc);
2030 *(__le32 *) buf = cpu_to_le32(0);
2036 /* whoever resets or resumes must GetPortStatus to
2039 if (dum_hcd->resuming &&
2040 time_after_eq(jiffies, dum_hcd->re_timeout)) {
2041 dum_hcd->port_status |= (USB_PORT_STAT_C_SUSPEND << 16);
2042 dum_hcd->port_status &= ~USB_PORT_STAT_SUSPEND;
2044 if ((dum_hcd->port_status & USB_PORT_STAT_RESET) != 0 &&
2045 time_after_eq(jiffies, dum_hcd->re_timeout)) {
2046 dum_hcd->port_status |= (USB_PORT_STAT_C_RESET << 16);
2047 dum_hcd->port_status &= ~USB_PORT_STAT_RESET;
2048 if (dum_hcd->dum->pullup) {
2049 dum_hcd->port_status |= USB_PORT_STAT_ENABLE;
2051 if (hcd->speed < HCD_USB3) {
2052 switch (dum_hcd->dum->gadget.speed) {
2053 case USB_SPEED_HIGH:
2054 dum_hcd->port_status |=
2055 USB_PORT_STAT_HIGH_SPEED;
2058 dum_hcd->dum->gadget.ep0->
2060 dum_hcd->port_status |=
2061 USB_PORT_STAT_LOW_SPEED;
2064 dum_hcd->dum->gadget.speed =
2071 set_link_state(dum_hcd);
2072 ((__le16 *) buf)[0] = cpu_to_le16(dum_hcd->port_status);
2073 ((__le16 *) buf)[1] = cpu_to_le16(dum_hcd->port_status >> 16);
2078 case SetPortFeature:
2080 case USB_PORT_FEAT_LINK_STATE:
2081 if (hcd->speed != HCD_USB3) {
2082 dev_dbg(dummy_dev(dum_hcd),
2083 "USB_PORT_FEAT_LINK_STATE req not "
2084 "supported for USB 2.0 roothub\n");
2088 * Since this is dummy we don't have an actual link so
2089 * there is nothing to do for the SET_LINK_STATE cmd
2092 case USB_PORT_FEAT_U1_TIMEOUT:
2093 case USB_PORT_FEAT_U2_TIMEOUT:
2094 /* TODO: add suspend/resume support! */
2095 if (hcd->speed != HCD_USB3) {
2096 dev_dbg(dummy_dev(dum_hcd),
2097 "USB_PORT_FEAT_U1/2_TIMEOUT req not "
2098 "supported for USB 2.0 roothub\n");
2102 case USB_PORT_FEAT_SUSPEND:
2103 /* Applicable only for USB2.0 hub */
2104 if (hcd->speed == HCD_USB3) {
2105 dev_dbg(dummy_dev(dum_hcd),
2106 "USB_PORT_FEAT_SUSPEND req not "
2107 "supported for USB 3.0 roothub\n");
2110 if (dum_hcd->active) {
2111 dum_hcd->port_status |= USB_PORT_STAT_SUSPEND;
2113 /* HNP would happen here; for now we
2114 * assume b_bus_req is always true.
2116 set_link_state(dum_hcd);
2117 if (((1 << USB_DEVICE_B_HNP_ENABLE)
2118 & dum_hcd->dum->devstatus) != 0)
2119 dev_dbg(dummy_dev(dum_hcd),
2123 case USB_PORT_FEAT_POWER:
2124 if (hcd->speed == HCD_USB3)
2125 dum_hcd->port_status |= USB_SS_PORT_STAT_POWER;
2127 dum_hcd->port_status |= USB_PORT_STAT_POWER;
2128 set_link_state(dum_hcd);
2130 case USB_PORT_FEAT_BH_PORT_RESET:
2131 /* Applicable only for USB3.0 hub */
2132 if (hcd->speed != HCD_USB3) {
2133 dev_dbg(dummy_dev(dum_hcd),
2134 "USB_PORT_FEAT_BH_PORT_RESET req not "
2135 "supported for USB 2.0 roothub\n");
2139 case USB_PORT_FEAT_RESET:
2140 /* if it's already enabled, disable */
2141 if (hcd->speed == HCD_USB3) {
2142 dum_hcd->port_status = 0;
2143 dum_hcd->port_status =
2144 (USB_SS_PORT_STAT_POWER |
2145 USB_PORT_STAT_CONNECTION |
2146 USB_PORT_STAT_RESET);
2148 dum_hcd->port_status &= ~(USB_PORT_STAT_ENABLE
2149 | USB_PORT_STAT_LOW_SPEED
2150 | USB_PORT_STAT_HIGH_SPEED);
2152 * We want to reset device status. All but the
2153 * Self powered feature
2155 dum_hcd->dum->devstatus &=
2156 (1 << USB_DEVICE_SELF_POWERED);
2158 * FIXME USB3.0: what is the correct reset signaling
2159 * interval? Is it still 50msec as for HS?
2161 dum_hcd->re_timeout = jiffies + msecs_to_jiffies(50);
2164 if (hcd->speed == HCD_USB3) {
2165 if ((dum_hcd->port_status &
2166 USB_SS_PORT_STAT_POWER) != 0) {
2167 dum_hcd->port_status |= (1 << wValue);
2168 set_link_state(dum_hcd);
2171 if ((dum_hcd->port_status &
2172 USB_PORT_STAT_POWER) != 0) {
2173 dum_hcd->port_status |= (1 << wValue);
2174 set_link_state(dum_hcd);
2178 case GetPortErrorCount:
2179 if (hcd->speed != HCD_USB3) {
2180 dev_dbg(dummy_dev(dum_hcd),
2181 "GetPortErrorCount req not "
2182 "supported for USB 2.0 roothub\n");
2185 /* We'll always return 0 since this is a dummy hub */
2186 *(__le32 *) buf = cpu_to_le32(0);
2189 if (hcd->speed != HCD_USB3) {
2190 dev_dbg(dummy_dev(dum_hcd),
2191 "SetHubDepth req not supported for "
2192 "USB 2.0 roothub\n");
2197 dev_dbg(dummy_dev(dum_hcd),
2198 "hub control req%04x v%04x i%04x l%d\n",
2199 typeReq, wValue, wIndex, wLength);
2201 /* "protocol stall" on error */
2204 spin_unlock_irqrestore(&dum_hcd->dum->lock, flags);
2206 if ((dum_hcd->port_status & PORT_C_MASK) != 0)
2207 usb_hcd_poll_rh_status(hcd);
2211 static int dummy_bus_suspend(struct usb_hcd *hcd)
2213 struct dummy_hcd *dum_hcd = hcd_to_dummy_hcd(hcd);
2215 dev_dbg(&hcd->self.root_hub->dev, "%s\n", __func__);
2217 spin_lock_irq(&dum_hcd->dum->lock);
2218 dum_hcd->rh_state = DUMMY_RH_SUSPENDED;
2219 set_link_state(dum_hcd);
2220 hcd->state = HC_STATE_SUSPENDED;
2221 spin_unlock_irq(&dum_hcd->dum->lock);
2225 static int dummy_bus_resume(struct usb_hcd *hcd)
2227 struct dummy_hcd *dum_hcd = hcd_to_dummy_hcd(hcd);
2230 dev_dbg(&hcd->self.root_hub->dev, "%s\n", __func__);
2232 spin_lock_irq(&dum_hcd->dum->lock);
2233 if (!HCD_HW_ACCESSIBLE(hcd)) {
2236 dum_hcd->rh_state = DUMMY_RH_RUNNING;
2237 set_link_state(dum_hcd);
2238 if (!list_empty(&dum_hcd->urbp_list))
2239 mod_timer(&dum_hcd->timer, jiffies);
2240 hcd->state = HC_STATE_RUNNING;
2242 spin_unlock_irq(&dum_hcd->dum->lock);
2246 /*-------------------------------------------------------------------------*/
2248 static inline ssize_t show_urb(char *buf, size_t size, struct urb *urb)
2250 int ep = usb_pipeendpoint(urb->pipe);
2252 return snprintf(buf, size,
2253 "urb/%p %s ep%d%s%s len %d/%d\n",
2256 switch (urb->dev->speed) {
2260 case USB_SPEED_FULL:
2263 case USB_SPEED_HIGH:
2266 case USB_SPEED_SUPER:
2273 ep, ep ? (usb_pipein(urb->pipe) ? "in" : "out") : "",
2275 switch (usb_pipetype(urb->pipe)) { \
2276 case PIPE_CONTROL: \
2282 case PIPE_INTERRUPT: \
2289 urb->actual_length, urb->transfer_buffer_length);
2292 static ssize_t urbs_show(struct device *dev, struct device_attribute *attr,
2295 struct usb_hcd *hcd = dev_get_drvdata(dev);
2296 struct dummy_hcd *dum_hcd = hcd_to_dummy_hcd(hcd);
2299 unsigned long flags;
2301 spin_lock_irqsave(&dum_hcd->dum->lock, flags);
2302 list_for_each_entry(urbp, &dum_hcd->urbp_list, urbp_list) {
2305 temp = show_urb(buf, PAGE_SIZE - size, urbp->urb);
2309 spin_unlock_irqrestore(&dum_hcd->dum->lock, flags);
2313 static DEVICE_ATTR_RO(urbs);
2315 static int dummy_start_ss(struct dummy_hcd *dum_hcd)
2317 init_timer(&dum_hcd->timer);
2318 dum_hcd->timer.function = dummy_timer;
2319 dum_hcd->timer.data = (unsigned long)dum_hcd;
2320 dum_hcd->rh_state = DUMMY_RH_RUNNING;
2321 dum_hcd->stream_en_ep = 0;
2322 INIT_LIST_HEAD(&dum_hcd->urbp_list);
2323 dummy_hcd_to_hcd(dum_hcd)->power_budget = POWER_BUDGET;
2324 dummy_hcd_to_hcd(dum_hcd)->state = HC_STATE_RUNNING;
2325 dummy_hcd_to_hcd(dum_hcd)->uses_new_polling = 1;
2326 #ifdef CONFIG_USB_OTG
2327 dummy_hcd_to_hcd(dum_hcd)->self.otg_port = 1;
2331 /* FIXME 'urbs' should be a per-device thing, maybe in usbcore */
2332 return device_create_file(dummy_dev(dum_hcd), &dev_attr_urbs);
2335 static int dummy_start(struct usb_hcd *hcd)
2337 struct dummy_hcd *dum_hcd = hcd_to_dummy_hcd(hcd);
2340 * MASTER side init ... we emulate a root hub that'll only ever
2341 * talk to one device (the slave side). Also appears in sysfs,
2342 * just like more familiar pci-based HCDs.
2344 if (!usb_hcd_is_primary_hcd(hcd))
2345 return dummy_start_ss(dum_hcd);
2347 spin_lock_init(&dum_hcd->dum->lock);
2348 init_timer(&dum_hcd->timer);
2349 dum_hcd->timer.function = dummy_timer;
2350 dum_hcd->timer.data = (unsigned long)dum_hcd;
2351 dum_hcd->rh_state = DUMMY_RH_RUNNING;
2353 INIT_LIST_HEAD(&dum_hcd->urbp_list);
2355 hcd->power_budget = POWER_BUDGET;
2356 hcd->state = HC_STATE_RUNNING;
2357 hcd->uses_new_polling = 1;
2359 #ifdef CONFIG_USB_OTG
2360 hcd->self.otg_port = 1;
2363 /* FIXME 'urbs' should be a per-device thing, maybe in usbcore */
2364 return device_create_file(dummy_dev(dum_hcd), &dev_attr_urbs);
2367 static void dummy_stop(struct usb_hcd *hcd)
2371 dum = hcd_to_dummy_hcd(hcd)->dum;
2372 device_remove_file(dummy_dev(hcd_to_dummy_hcd(hcd)), &dev_attr_urbs);
2373 usb_gadget_unregister_driver(dum->driver);
2374 dev_info(dummy_dev(hcd_to_dummy_hcd(hcd)), "stopped\n");
2377 /*-------------------------------------------------------------------------*/
2379 static int dummy_h_get_frame(struct usb_hcd *hcd)
2381 return dummy_g_get_frame(NULL);
2384 static int dummy_setup(struct usb_hcd *hcd)
2388 dum = *((void **)dev_get_platdata(hcd->self.controller));
2389 hcd->self.sg_tablesize = ~0;
2390 if (usb_hcd_is_primary_hcd(hcd)) {
2391 dum->hs_hcd = hcd_to_dummy_hcd(hcd);
2392 dum->hs_hcd->dum = dum;
2394 * Mark the first roothub as being USB 2.0.
2395 * The USB 3.0 roothub will be registered later by
2398 hcd->speed = HCD_USB2;
2399 hcd->self.root_hub->speed = USB_SPEED_HIGH;
2401 dum->ss_hcd = hcd_to_dummy_hcd(hcd);
2402 dum->ss_hcd->dum = dum;
2403 hcd->speed = HCD_USB3;
2404 hcd->self.root_hub->speed = USB_SPEED_SUPER;
2409 /* Change a group of bulk endpoints to support multiple stream IDs */
2410 static int dummy_alloc_streams(struct usb_hcd *hcd, struct usb_device *udev,
2411 struct usb_host_endpoint **eps, unsigned int num_eps,
2412 unsigned int num_streams, gfp_t mem_flags)
2414 struct dummy_hcd *dum_hcd = hcd_to_dummy_hcd(hcd);
2415 unsigned long flags;
2417 int ret_streams = num_streams;
2424 spin_lock_irqsave(&dum_hcd->dum->lock, flags);
2425 for (i = 0; i < num_eps; i++) {
2426 index = dummy_get_ep_idx(&eps[i]->desc);
2427 if ((1 << index) & dum_hcd->stream_en_ep) {
2428 ret_streams = -EINVAL;
2431 max_stream = usb_ss_max_streams(&eps[i]->ss_ep_comp);
2433 ret_streams = -EINVAL;
2436 if (max_stream < ret_streams) {
2437 dev_dbg(dummy_dev(dum_hcd), "Ep 0x%x only supports %u "
2439 eps[i]->desc.bEndpointAddress,
2441 ret_streams = max_stream;
2445 for (i = 0; i < num_eps; i++) {
2446 index = dummy_get_ep_idx(&eps[i]->desc);
2447 dum_hcd->stream_en_ep |= 1 << index;
2448 set_max_streams_for_pipe(dum_hcd,
2449 usb_endpoint_num(&eps[i]->desc), ret_streams);
2452 spin_unlock_irqrestore(&dum_hcd->dum->lock, flags);
2456 /* Reverts a group of bulk endpoints back to not using stream IDs. */
2457 static int dummy_free_streams(struct usb_hcd *hcd, struct usb_device *udev,
2458 struct usb_host_endpoint **eps, unsigned int num_eps,
2461 struct dummy_hcd *dum_hcd = hcd_to_dummy_hcd(hcd);
2462 unsigned long flags;
2467 spin_lock_irqsave(&dum_hcd->dum->lock, flags);
2468 for (i = 0; i < num_eps; i++) {
2469 index = dummy_get_ep_idx(&eps[i]->desc);
2470 if (!((1 << index) & dum_hcd->stream_en_ep)) {
2476 for (i = 0; i < num_eps; i++) {
2477 index = dummy_get_ep_idx(&eps[i]->desc);
2478 dum_hcd->stream_en_ep &= ~(1 << index);
2479 set_max_streams_for_pipe(dum_hcd,
2480 usb_endpoint_num(&eps[i]->desc), 0);
2484 spin_unlock_irqrestore(&dum_hcd->dum->lock, flags);
2488 static struct hc_driver dummy_hcd = {
2489 .description = (char *) driver_name,
2490 .product_desc = "Dummy host controller",
2491 .hcd_priv_size = sizeof(struct dummy_hcd),
2493 .flags = HCD_USB3 | HCD_SHARED,
2495 .reset = dummy_setup,
2496 .start = dummy_start,
2499 .urb_enqueue = dummy_urb_enqueue,
2500 .urb_dequeue = dummy_urb_dequeue,
2502 .get_frame_number = dummy_h_get_frame,
2504 .hub_status_data = dummy_hub_status,
2505 .hub_control = dummy_hub_control,
2506 .bus_suspend = dummy_bus_suspend,
2507 .bus_resume = dummy_bus_resume,
2509 .alloc_streams = dummy_alloc_streams,
2510 .free_streams = dummy_free_streams,
2513 static int dummy_hcd_probe(struct platform_device *pdev)
2516 struct usb_hcd *hs_hcd;
2517 struct usb_hcd *ss_hcd;
2520 dev_info(&pdev->dev, "%s, driver " DRIVER_VERSION "\n", driver_desc);
2521 dum = *((void **)dev_get_platdata(&pdev->dev));
2523 if (!mod_data.is_super_speed)
2524 dummy_hcd.flags = HCD_USB2;
2525 hs_hcd = usb_create_hcd(&dummy_hcd, &pdev->dev, dev_name(&pdev->dev));
2530 retval = usb_add_hcd(hs_hcd, 0, 0);
2534 if (mod_data.is_super_speed) {
2535 ss_hcd = usb_create_shared_hcd(&dummy_hcd, &pdev->dev,
2536 dev_name(&pdev->dev), hs_hcd);
2539 goto dealloc_usb2_hcd;
2542 retval = usb_add_hcd(ss_hcd, 0, 0);
2549 usb_put_hcd(ss_hcd);
2551 usb_remove_hcd(hs_hcd);
2553 usb_put_hcd(hs_hcd);
2554 dum->hs_hcd = dum->ss_hcd = NULL;
2558 static int dummy_hcd_remove(struct platform_device *pdev)
2562 dum = hcd_to_dummy_hcd(platform_get_drvdata(pdev))->dum;
2565 usb_remove_hcd(dummy_hcd_to_hcd(dum->ss_hcd));
2566 usb_put_hcd(dummy_hcd_to_hcd(dum->ss_hcd));
2569 usb_remove_hcd(dummy_hcd_to_hcd(dum->hs_hcd));
2570 usb_put_hcd(dummy_hcd_to_hcd(dum->hs_hcd));
2578 static int dummy_hcd_suspend(struct platform_device *pdev, pm_message_t state)
2580 struct usb_hcd *hcd;
2581 struct dummy_hcd *dum_hcd;
2584 dev_dbg(&pdev->dev, "%s\n", __func__);
2586 hcd = platform_get_drvdata(pdev);
2587 dum_hcd = hcd_to_dummy_hcd(hcd);
2588 if (dum_hcd->rh_state == DUMMY_RH_RUNNING) {
2589 dev_warn(&pdev->dev, "Root hub isn't suspended!\n");
2592 clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
2596 static int dummy_hcd_resume(struct platform_device *pdev)
2598 struct usb_hcd *hcd;
2600 dev_dbg(&pdev->dev, "%s\n", __func__);
2602 hcd = platform_get_drvdata(pdev);
2603 set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
2604 usb_hcd_poll_rh_status(hcd);
2608 static struct platform_driver dummy_hcd_driver = {
2609 .probe = dummy_hcd_probe,
2610 .remove = dummy_hcd_remove,
2611 .suspend = dummy_hcd_suspend,
2612 .resume = dummy_hcd_resume,
2614 .name = (char *) driver_name,
2615 .owner = THIS_MODULE,
2619 /*-------------------------------------------------------------------------*/
2620 #define MAX_NUM_UDC 2
2621 static struct platform_device *the_udc_pdev[MAX_NUM_UDC];
2622 static struct platform_device *the_hcd_pdev[MAX_NUM_UDC];
2624 static int __init init(void)
2626 int retval = -ENOMEM;
2628 struct dummy *dum[MAX_NUM_UDC];
2633 if (!mod_data.is_high_speed && mod_data.is_super_speed)
2636 if (mod_data.num < 1 || mod_data.num > MAX_NUM_UDC) {
2637 pr_err("Number of emulated UDC must be in range of 1…%d\n",
2642 for (i = 0; i < mod_data.num; i++) {
2643 the_hcd_pdev[i] = platform_device_alloc(driver_name, i);
2644 if (!the_hcd_pdev[i]) {
2647 platform_device_put(the_hcd_pdev[i--]);
2651 for (i = 0; i < mod_data.num; i++) {
2652 the_udc_pdev[i] = platform_device_alloc(gadget_name, i);
2653 if (!the_udc_pdev[i]) {
2656 platform_device_put(the_udc_pdev[i--]);
2660 for (i = 0; i < mod_data.num; i++) {
2661 dum[i] = kzalloc(sizeof(struct dummy), GFP_KERNEL);
2666 retval = platform_device_add_data(the_hcd_pdev[i], &dum[i],
2670 retval = platform_device_add_data(the_udc_pdev[i], &dum[i],
2676 retval = platform_driver_register(&dummy_hcd_driver);
2679 retval = platform_driver_register(&dummy_udc_driver);
2681 goto err_register_udc_driver;
2683 for (i = 0; i < mod_data.num; i++) {
2684 retval = platform_device_add(the_hcd_pdev[i]);
2688 platform_device_del(the_hcd_pdev[i--]);
2692 for (i = 0; i < mod_data.num; i++) {
2693 if (!dum[i]->hs_hcd ||
2694 (!dum[i]->ss_hcd && mod_data.is_super_speed)) {
2696 * The hcd was added successfully but its probe
2697 * function failed for some reason.
2704 for (i = 0; i < mod_data.num; i++) {
2705 retval = platform_device_add(the_udc_pdev[i]);
2709 platform_device_del(the_udc_pdev[i]);
2714 for (i = 0; i < mod_data.num; i++) {
2715 if (!platform_get_drvdata(the_udc_pdev[i])) {
2717 * The udc was added successfully but its probe
2718 * function failed for some reason.
2727 for (i = 0; i < mod_data.num; i++)
2728 platform_device_del(the_udc_pdev[i]);
2730 for (i = 0; i < mod_data.num; i++)
2731 platform_device_del(the_hcd_pdev[i]);
2733 platform_driver_unregister(&dummy_udc_driver);
2734 err_register_udc_driver:
2735 platform_driver_unregister(&dummy_hcd_driver);
2737 for (i = 0; i < mod_data.num; i++)
2739 for (i = 0; i < mod_data.num; i++)
2740 platform_device_put(the_udc_pdev[i]);
2742 for (i = 0; i < mod_data.num; i++)
2743 platform_device_put(the_hcd_pdev[i]);
2748 static void __exit cleanup(void)
2752 for (i = 0; i < mod_data.num; i++) {
2755 dum = *((void **)dev_get_platdata(&the_udc_pdev[i]->dev));
2757 platform_device_unregister(the_udc_pdev[i]);
2758 platform_device_unregister(the_hcd_pdev[i]);
2761 platform_driver_unregister(&dummy_udc_driver);
2762 platform_driver_unregister(&dummy_hcd_driver);
2764 module_exit(cleanup);