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 usb_gadget_giveback_request(&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 /* Currently !connected or in reset */
371 if ((dum_hcd->port_status & USB_PORT_STAT_CONNECTION) == 0 ||
372 (dum_hcd->port_status & USB_PORT_STAT_RESET) != 0) {
373 unsigned disconnect = USB_PORT_STAT_CONNECTION &
374 dum_hcd->old_status & (~dum_hcd->port_status);
375 unsigned reset = USB_PORT_STAT_RESET &
376 (~dum_hcd->old_status) & dum_hcd->port_status;
378 /* Report reset and disconnect events to the driver */
379 if (dum->driver && (disconnect || reset)) {
381 spin_unlock(&dum->lock);
383 usb_gadget_udc_reset(&dum->gadget, dum->driver);
385 dum->driver->disconnect(&dum->gadget);
386 spin_lock(&dum->lock);
388 } else if (dum_hcd->active != dum_hcd->old_active) {
389 if (dum_hcd->old_active && dum->driver->suspend) {
390 spin_unlock(&dum->lock);
391 dum->driver->suspend(&dum->gadget);
392 spin_lock(&dum->lock);
393 } else if (!dum_hcd->old_active && dum->driver->resume) {
394 spin_unlock(&dum->lock);
395 dum->driver->resume(&dum->gadget);
396 spin_lock(&dum->lock);
400 dum_hcd->old_status = dum_hcd->port_status;
401 dum_hcd->old_active = dum_hcd->active;
404 /*-------------------------------------------------------------------------*/
406 /* SLAVE/GADGET SIDE DRIVER
408 * This only tracks gadget state. All the work is done when the host
409 * side tries some (emulated) i/o operation. Real device controller
410 * drivers would do real i/o using dma, fifos, irqs, timers, etc.
413 #define is_enabled(dum) \
414 (dum->port_status & USB_PORT_STAT_ENABLE)
416 static int dummy_enable(struct usb_ep *_ep,
417 const struct usb_endpoint_descriptor *desc)
420 struct dummy_hcd *dum_hcd;
425 ep = usb_ep_to_dummy_ep(_ep);
426 if (!_ep || !desc || ep->desc || _ep->name == ep0name
427 || desc->bDescriptorType != USB_DT_ENDPOINT)
429 dum = ep_to_dummy(ep);
433 dum_hcd = gadget_to_dummy_hcd(&dum->gadget);
434 if (!is_enabled(dum_hcd))
438 * For HS/FS devices only bits 0..10 of the wMaxPacketSize represent the
439 * maximum packet size.
440 * For SS devices the wMaxPacketSize is limited by 1024.
442 max = usb_endpoint_maxp(desc) & 0x7ff;
444 /* drivers must not request bad settings, since lower levels
445 * (hardware or its drivers) may not check. some endpoints
446 * can't do iso, many have maxpacket limitations, etc.
448 * since this "hardware" driver is here to help debugging, we
449 * have some extra sanity checks. (there could be more though,
450 * especially for "ep9out" style fixed function ones.)
453 switch (usb_endpoint_type(desc)) {
454 case USB_ENDPOINT_XFER_BULK:
455 if (strstr(ep->ep.name, "-iso")
456 || strstr(ep->ep.name, "-int")) {
459 switch (dum->gadget.speed) {
460 case USB_SPEED_SUPER:
469 if (max == 8 || max == 16 || max == 32 || max == 64)
470 /* we'll fake any legal size */
472 /* save a return statement */
477 case USB_ENDPOINT_XFER_INT:
478 if (strstr(ep->ep.name, "-iso")) /* bulk is ok */
480 /* real hardware might not handle all packet sizes */
481 switch (dum->gadget.speed) {
482 case USB_SPEED_SUPER:
486 /* save a return statement */
490 /* save a return statement */
497 case USB_ENDPOINT_XFER_ISOC:
498 if (strstr(ep->ep.name, "-bulk")
499 || strstr(ep->ep.name, "-int"))
501 /* real hardware might not handle all packet sizes */
502 switch (dum->gadget.speed) {
503 case USB_SPEED_SUPER:
507 /* save a return statement */
511 /* save a return statement */
517 /* few chips support control except on ep0 */
521 _ep->maxpacket = max;
522 if (usb_ss_max_streams(_ep->comp_desc)) {
523 if (!usb_endpoint_xfer_bulk(desc)) {
524 dev_err(udc_dev(dum), "Can't enable stream support on "
525 "non-bulk ep %s\n", _ep->name);
532 dev_dbg(udc_dev(dum), "enabled %s (ep%d%s-%s) maxpacket %d stream %s\n",
534 desc->bEndpointAddress & 0x0f,
535 (desc->bEndpointAddress & USB_DIR_IN) ? "in" : "out",
537 switch (usb_endpoint_type(desc)) {
538 case USB_ENDPOINT_XFER_BULK:
541 case USB_ENDPOINT_XFER_ISOC:
544 case USB_ENDPOINT_XFER_INT:
551 max, ep->stream_en ? "enabled" : "disabled");
553 /* at this point real hardware should be NAKing transfers
554 * to that endpoint, until a buffer is queued to it.
556 ep->halted = ep->wedged = 0;
562 static int dummy_disable(struct usb_ep *_ep)
568 ep = usb_ep_to_dummy_ep(_ep);
569 if (!_ep || !ep->desc || _ep->name == ep0name)
571 dum = ep_to_dummy(ep);
573 spin_lock_irqsave(&dum->lock, flags);
577 spin_unlock_irqrestore(&dum->lock, flags);
579 dev_dbg(udc_dev(dum), "disabled %s\n", _ep->name);
583 static struct usb_request *dummy_alloc_request(struct usb_ep *_ep,
587 struct dummy_request *req;
591 ep = usb_ep_to_dummy_ep(_ep);
593 req = kzalloc(sizeof(*req), mem_flags);
596 INIT_LIST_HEAD(&req->queue);
600 static void dummy_free_request(struct usb_ep *_ep, struct usb_request *_req)
602 struct dummy_request *req;
609 req = usb_request_to_dummy_request(_req);
610 WARN_ON(!list_empty(&req->queue));
614 static void fifo_complete(struct usb_ep *ep, struct usb_request *req)
618 static int dummy_queue(struct usb_ep *_ep, struct usb_request *_req,
622 struct dummy_request *req;
624 struct dummy_hcd *dum_hcd;
627 req = usb_request_to_dummy_request(_req);
628 if (!_req || !list_empty(&req->queue) || !_req->complete)
631 ep = usb_ep_to_dummy_ep(_ep);
632 if (!_ep || (!ep->desc && _ep->name != ep0name))
635 dum = ep_to_dummy(ep);
636 dum_hcd = gadget_to_dummy_hcd(&dum->gadget);
637 if (!dum->driver || !is_enabled(dum_hcd))
641 dev_dbg(udc_dev(dum), "ep %p queue req %p to %s, len %d buf %p\n",
642 ep, _req, _ep->name, _req->length, _req->buf);
644 _req->status = -EINPROGRESS;
646 spin_lock_irqsave(&dum->lock, flags);
648 /* implement an emulated single-request FIFO */
649 if (ep->desc && (ep->desc->bEndpointAddress & USB_DIR_IN) &&
650 list_empty(&dum->fifo_req.queue) &&
651 list_empty(&ep->queue) &&
652 _req->length <= FIFO_SIZE) {
653 req = &dum->fifo_req;
655 req->req.buf = dum->fifo_buf;
656 memcpy(dum->fifo_buf, _req->buf, _req->length);
657 req->req.context = dum;
658 req->req.complete = fifo_complete;
660 list_add_tail(&req->queue, &ep->queue);
661 spin_unlock(&dum->lock);
662 _req->actual = _req->length;
664 usb_gadget_giveback_request(_ep, _req);
665 spin_lock(&dum->lock);
667 list_add_tail(&req->queue, &ep->queue);
668 spin_unlock_irqrestore(&dum->lock, flags);
670 /* real hardware would likely enable transfers here, in case
671 * it'd been left NAKing.
676 static int dummy_dequeue(struct usb_ep *_ep, struct usb_request *_req)
680 int retval = -EINVAL;
682 struct dummy_request *req = NULL;
686 ep = usb_ep_to_dummy_ep(_ep);
687 dum = ep_to_dummy(ep);
692 local_irq_save(flags);
693 spin_lock(&dum->lock);
694 list_for_each_entry(req, &ep->queue, queue) {
695 if (&req->req == _req) {
696 list_del_init(&req->queue);
697 _req->status = -ECONNRESET;
702 spin_unlock(&dum->lock);
705 dev_dbg(udc_dev(dum),
706 "dequeued req %p from %s, len %d buf %p\n",
707 req, _ep->name, _req->length, _req->buf);
708 usb_gadget_giveback_request(_ep, _req);
710 local_irq_restore(flags);
715 dummy_set_halt_and_wedge(struct usb_ep *_ep, int value, int wedged)
722 ep = usb_ep_to_dummy_ep(_ep);
723 dum = ep_to_dummy(ep);
727 ep->halted = ep->wedged = 0;
728 else if (ep->desc && (ep->desc->bEndpointAddress & USB_DIR_IN) &&
729 !list_empty(&ep->queue))
736 /* FIXME clear emulated data toggle too */
741 dummy_set_halt(struct usb_ep *_ep, int value)
743 return dummy_set_halt_and_wedge(_ep, value, 0);
746 static int dummy_set_wedge(struct usb_ep *_ep)
748 if (!_ep || _ep->name == ep0name)
750 return dummy_set_halt_and_wedge(_ep, 1, 1);
753 static const struct usb_ep_ops dummy_ep_ops = {
754 .enable = dummy_enable,
755 .disable = dummy_disable,
757 .alloc_request = dummy_alloc_request,
758 .free_request = dummy_free_request,
760 .queue = dummy_queue,
761 .dequeue = dummy_dequeue,
763 .set_halt = dummy_set_halt,
764 .set_wedge = dummy_set_wedge,
767 /*-------------------------------------------------------------------------*/
769 /* there are both host and device side versions of this call ... */
770 static int dummy_g_get_frame(struct usb_gadget *_gadget)
774 do_gettimeofday(&tv);
775 return tv.tv_usec / 1000;
778 static int dummy_wakeup(struct usb_gadget *_gadget)
780 struct dummy_hcd *dum_hcd;
782 dum_hcd = gadget_to_dummy_hcd(_gadget);
783 if (!(dum_hcd->dum->devstatus & ((1 << USB_DEVICE_B_HNP_ENABLE)
784 | (1 << USB_DEVICE_REMOTE_WAKEUP))))
786 if ((dum_hcd->port_status & USB_PORT_STAT_CONNECTION) == 0)
788 if ((dum_hcd->port_status & USB_PORT_STAT_SUSPEND) == 0 &&
789 dum_hcd->rh_state != DUMMY_RH_SUSPENDED)
792 /* FIXME: What if the root hub is suspended but the port isn't? */
794 /* hub notices our request, issues downstream resume, etc */
795 dum_hcd->resuming = 1;
796 dum_hcd->re_timeout = jiffies + msecs_to_jiffies(20);
797 mod_timer(&dummy_hcd_to_hcd(dum_hcd)->rh_timer, dum_hcd->re_timeout);
801 static int dummy_set_selfpowered(struct usb_gadget *_gadget, int value)
805 _gadget->is_selfpowered = (value != 0);
806 dum = gadget_to_dummy_hcd(_gadget)->dum;
808 dum->devstatus |= (1 << USB_DEVICE_SELF_POWERED);
810 dum->devstatus &= ~(1 << USB_DEVICE_SELF_POWERED);
814 static void dummy_udc_update_ep0(struct dummy *dum)
816 if (dum->gadget.speed == USB_SPEED_SUPER)
817 dum->ep[0].ep.maxpacket = 9;
819 dum->ep[0].ep.maxpacket = 64;
822 static int dummy_pullup(struct usb_gadget *_gadget, int value)
824 struct dummy_hcd *dum_hcd;
828 dum = gadget_dev_to_dummy(&_gadget->dev);
830 if (value && dum->driver) {
831 if (mod_data.is_super_speed)
832 dum->gadget.speed = dum->driver->max_speed;
833 else if (mod_data.is_high_speed)
834 dum->gadget.speed = min_t(u8, USB_SPEED_HIGH,
835 dum->driver->max_speed);
837 dum->gadget.speed = USB_SPEED_FULL;
838 dummy_udc_update_ep0(dum);
840 if (dum->gadget.speed < dum->driver->max_speed)
841 dev_dbg(udc_dev(dum), "This device can perform faster"
842 " if you connect it to a %s port...\n",
843 usb_speed_string(dum->driver->max_speed));
845 dum_hcd = gadget_to_dummy_hcd(_gadget);
847 spin_lock_irqsave(&dum->lock, flags);
848 dum->pullup = (value != 0);
849 set_link_state(dum_hcd);
850 spin_unlock_irqrestore(&dum->lock, flags);
852 usb_hcd_poll_rh_status(dummy_hcd_to_hcd(dum_hcd));
856 static int dummy_udc_start(struct usb_gadget *g,
857 struct usb_gadget_driver *driver);
858 static int dummy_udc_stop(struct usb_gadget *g);
860 static const struct usb_gadget_ops dummy_ops = {
861 .get_frame = dummy_g_get_frame,
862 .wakeup = dummy_wakeup,
863 .set_selfpowered = dummy_set_selfpowered,
864 .pullup = dummy_pullup,
865 .udc_start = dummy_udc_start,
866 .udc_stop = dummy_udc_stop,
869 /*-------------------------------------------------------------------------*/
871 /* "function" sysfs attribute */
872 static ssize_t function_show(struct device *dev, struct device_attribute *attr,
875 struct dummy *dum = gadget_dev_to_dummy(dev);
877 if (!dum->driver || !dum->driver->function)
879 return scnprintf(buf, PAGE_SIZE, "%s\n", dum->driver->function);
881 static DEVICE_ATTR_RO(function);
883 /*-------------------------------------------------------------------------*/
886 * Driver registration/unregistration.
888 * This is basically hardware-specific; there's usually only one real USB
889 * device (not host) controller since that's how USB devices are intended
890 * to work. So most implementations of these api calls will rely on the
891 * fact that only one driver will ever bind to the hardware. But curious
892 * hardware can be built with discrete components, so the gadget API doesn't
893 * require that assumption.
895 * For this emulator, it might be convenient to create a usb slave device
896 * for each driver that registers: just add to a big root hub.
899 static int dummy_udc_start(struct usb_gadget *g,
900 struct usb_gadget_driver *driver)
902 struct dummy_hcd *dum_hcd = gadget_to_dummy_hcd(g);
903 struct dummy *dum = dum_hcd->dum;
905 if (driver->max_speed == USB_SPEED_UNKNOWN)
909 * SLAVE side init ... the layer above hardware, which
910 * can't enumerate without help from the driver we're binding.
914 dum->driver = driver;
919 static int dummy_udc_stop(struct usb_gadget *g)
921 struct dummy_hcd *dum_hcd = gadget_to_dummy_hcd(g);
922 struct dummy *dum = dum_hcd->dum;
931 /* The gadget structure is stored inside the hcd structure and will be
932 * released along with it. */
933 static void init_dummy_udc_hw(struct dummy *dum)
937 INIT_LIST_HEAD(&dum->gadget.ep_list);
938 for (i = 0; i < DUMMY_ENDPOINTS; i++) {
939 struct dummy_ep *ep = &dum->ep[i];
943 ep->ep.name = ep_name[i];
944 ep->ep.ops = &dummy_ep_ops;
945 list_add_tail(&ep->ep.ep_list, &dum->gadget.ep_list);
946 ep->halted = ep->wedged = ep->already_seen =
948 usb_ep_set_maxpacket_limit(&ep->ep, ~0);
949 ep->ep.max_streams = 16;
950 ep->last_io = jiffies;
951 ep->gadget = &dum->gadget;
953 INIT_LIST_HEAD(&ep->queue);
956 dum->gadget.ep0 = &dum->ep[0].ep;
957 list_del_init(&dum->ep[0].ep.ep_list);
958 INIT_LIST_HEAD(&dum->fifo_req.queue);
960 #ifdef CONFIG_USB_OTG
961 dum->gadget.is_otg = 1;
965 static int dummy_udc_probe(struct platform_device *pdev)
970 dum = *((void **)dev_get_platdata(&pdev->dev));
971 dum->gadget.name = gadget_name;
972 dum->gadget.ops = &dummy_ops;
973 dum->gadget.max_speed = USB_SPEED_SUPER;
975 dum->gadget.dev.parent = &pdev->dev;
976 init_dummy_udc_hw(dum);
978 rc = usb_add_gadget_udc(&pdev->dev, &dum->gadget);
982 rc = device_create_file(&dum->gadget.dev, &dev_attr_function);
985 platform_set_drvdata(pdev, dum);
989 usb_del_gadget_udc(&dum->gadget);
994 static int dummy_udc_remove(struct platform_device *pdev)
996 struct dummy *dum = platform_get_drvdata(pdev);
998 device_remove_file(&dum->gadget.dev, &dev_attr_function);
999 usb_del_gadget_udc(&dum->gadget);
1003 static void dummy_udc_pm(struct dummy *dum, struct dummy_hcd *dum_hcd,
1006 spin_lock_irq(&dum->lock);
1007 dum->udc_suspended = suspend;
1008 set_link_state(dum_hcd);
1009 spin_unlock_irq(&dum->lock);
1012 static int dummy_udc_suspend(struct platform_device *pdev, pm_message_t state)
1014 struct dummy *dum = platform_get_drvdata(pdev);
1015 struct dummy_hcd *dum_hcd = gadget_to_dummy_hcd(&dum->gadget);
1017 dev_dbg(&pdev->dev, "%s\n", __func__);
1018 dummy_udc_pm(dum, dum_hcd, 1);
1019 usb_hcd_poll_rh_status(dummy_hcd_to_hcd(dum_hcd));
1023 static int dummy_udc_resume(struct platform_device *pdev)
1025 struct dummy *dum = platform_get_drvdata(pdev);
1026 struct dummy_hcd *dum_hcd = gadget_to_dummy_hcd(&dum->gadget);
1028 dev_dbg(&pdev->dev, "%s\n", __func__);
1029 dummy_udc_pm(dum, dum_hcd, 0);
1030 usb_hcd_poll_rh_status(dummy_hcd_to_hcd(dum_hcd));
1034 static struct platform_driver dummy_udc_driver = {
1035 .probe = dummy_udc_probe,
1036 .remove = dummy_udc_remove,
1037 .suspend = dummy_udc_suspend,
1038 .resume = dummy_udc_resume,
1040 .name = (char *) gadget_name,
1044 /*-------------------------------------------------------------------------*/
1046 static unsigned int dummy_get_ep_idx(const struct usb_endpoint_descriptor *desc)
1050 index = usb_endpoint_num(desc) << 1;
1051 if (usb_endpoint_dir_in(desc))
1056 /* MASTER/HOST SIDE DRIVER
1058 * this uses the hcd framework to hook up to host side drivers.
1059 * its root hub will only have one device, otherwise it acts like
1060 * a normal host controller.
1062 * when urbs are queued, they're just stuck on a list that we
1063 * scan in a timer callback. that callback connects writes from
1064 * the host with reads from the device, and so on, based on the
1068 static int dummy_ep_stream_en(struct dummy_hcd *dum_hcd, struct urb *urb)
1070 const struct usb_endpoint_descriptor *desc = &urb->ep->desc;
1073 if (!usb_endpoint_xfer_bulk(desc))
1076 index = dummy_get_ep_idx(desc);
1077 return (1 << index) & dum_hcd->stream_en_ep;
1081 * The max stream number is saved as a nibble so for the 30 possible endpoints
1082 * we only 15 bytes of memory. Therefore we are limited to max 16 streams (0
1083 * means we use only 1 stream). The maximum according to the spec is 16bit so
1084 * if the 16 stream limit is about to go, the array size should be incremented
1085 * to 30 elements of type u16.
1087 static int get_max_streams_for_pipe(struct dummy_hcd *dum_hcd,
1092 max_streams = dum_hcd->num_stream[usb_pipeendpoint(pipe)];
1093 if (usb_pipeout(pipe))
1101 static void set_max_streams_for_pipe(struct dummy_hcd *dum_hcd,
1102 unsigned int pipe, unsigned int streams)
1107 max_streams = dum_hcd->num_stream[usb_pipeendpoint(pipe)];
1108 if (usb_pipeout(pipe)) {
1112 max_streams &= 0xf0;
1114 max_streams |= streams;
1115 dum_hcd->num_stream[usb_pipeendpoint(pipe)] = max_streams;
1118 static int dummy_validate_stream(struct dummy_hcd *dum_hcd, struct urb *urb)
1120 unsigned int max_streams;
1123 enabled = dummy_ep_stream_en(dum_hcd, urb);
1124 if (!urb->stream_id) {
1132 max_streams = get_max_streams_for_pipe(dum_hcd,
1133 usb_pipeendpoint(urb->pipe));
1134 if (urb->stream_id > max_streams) {
1135 dev_err(dummy_dev(dum_hcd), "Stream id %d is out of range.\n",
1143 static int dummy_urb_enqueue(
1144 struct usb_hcd *hcd,
1148 struct dummy_hcd *dum_hcd;
1150 unsigned long flags;
1153 urbp = kmalloc(sizeof *urbp, mem_flags);
1157 urbp->miter_started = 0;
1159 dum_hcd = hcd_to_dummy_hcd(hcd);
1160 spin_lock_irqsave(&dum_hcd->dum->lock, flags);
1162 rc = dummy_validate_stream(dum_hcd, urb);
1168 rc = usb_hcd_link_urb_to_ep(hcd, urb);
1174 if (!dum_hcd->udev) {
1175 dum_hcd->udev = urb->dev;
1176 usb_get_dev(dum_hcd->udev);
1177 } else if (unlikely(dum_hcd->udev != urb->dev))
1178 dev_err(dummy_dev(dum_hcd), "usb_device address has changed!\n");
1180 list_add_tail(&urbp->urbp_list, &dum_hcd->urbp_list);
1182 if (usb_pipetype(urb->pipe) == PIPE_CONTROL)
1183 urb->error_count = 1; /* mark as a new urb */
1185 /* kick the scheduler, it'll do the rest */
1186 if (!timer_pending(&dum_hcd->timer))
1187 mod_timer(&dum_hcd->timer, jiffies + 1);
1190 spin_unlock_irqrestore(&dum_hcd->dum->lock, flags);
1194 static int dummy_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status)
1196 struct dummy_hcd *dum_hcd;
1197 unsigned long flags;
1200 /* giveback happens automatically in timer callback,
1201 * so make sure the callback happens */
1202 dum_hcd = hcd_to_dummy_hcd(hcd);
1203 spin_lock_irqsave(&dum_hcd->dum->lock, flags);
1205 rc = usb_hcd_check_unlink_urb(hcd, urb, status);
1206 if (!rc && dum_hcd->rh_state != DUMMY_RH_RUNNING &&
1207 !list_empty(&dum_hcd->urbp_list))
1208 mod_timer(&dum_hcd->timer, jiffies);
1210 spin_unlock_irqrestore(&dum_hcd->dum->lock, flags);
1214 static int dummy_perform_transfer(struct urb *urb, struct dummy_request *req,
1218 struct urbp *urbp = urb->hcpriv;
1220 struct sg_mapping_iter *miter = &urbp->miter;
1225 to_host = usb_pipein(urb->pipe);
1226 rbuf = req->req.buf + req->req.actual;
1228 if (!urb->num_sgs) {
1229 ubuf = urb->transfer_buffer + urb->actual_length;
1231 memcpy(ubuf, rbuf, len);
1233 memcpy(rbuf, ubuf, len);
1237 if (!urbp->miter_started) {
1238 u32 flags = SG_MITER_ATOMIC;
1241 flags |= SG_MITER_TO_SG;
1243 flags |= SG_MITER_FROM_SG;
1245 sg_miter_start(miter, urb->sg, urb->num_sgs, flags);
1246 urbp->miter_started = 1;
1248 next_sg = sg_miter_next(miter);
1249 if (next_sg == false) {
1255 this_sg = min_t(u32, len, miter->length);
1256 miter->consumed = this_sg;
1260 memcpy(ubuf, rbuf, this_sg);
1262 memcpy(rbuf, ubuf, this_sg);
1267 next_sg = sg_miter_next(miter);
1268 if (next_sg == false) {
1276 sg_miter_stop(miter);
1280 /* transfer up to a frame's worth; caller must own lock */
1281 static int transfer(struct dummy_hcd *dum_hcd, struct urb *urb,
1282 struct dummy_ep *ep, int limit, int *status)
1284 struct dummy *dum = dum_hcd->dum;
1285 struct dummy_request *req;
1288 /* if there's no request queued, the device is NAKing; return */
1289 list_for_each_entry(req, &ep->queue, queue) {
1290 unsigned host_len, dev_len, len;
1291 int is_short, to_host;
1294 if (dummy_ep_stream_en(dum_hcd, urb)) {
1295 if ((urb->stream_id != req->req.stream_id))
1299 /* 1..N packets of ep->ep.maxpacket each ... the last one
1300 * may be short (including zero length).
1302 * writer can send a zlp explicitly (length 0) or implicitly
1303 * (length mod maxpacket zero, and 'zero' flag); they always
1306 host_len = urb->transfer_buffer_length - urb->actual_length;
1307 dev_len = req->req.length - req->req.actual;
1308 len = min(host_len, dev_len);
1310 /* FIXME update emulated data toggle too */
1312 to_host = usb_pipein(urb->pipe);
1313 if (unlikely(len == 0))
1316 /* not enough bandwidth left? */
1317 if (limit < ep->ep.maxpacket && limit < len)
1319 len = min_t(unsigned, len, limit);
1323 /* use an extra pass for the final short packet */
1324 if (len > ep->ep.maxpacket) {
1326 len -= (len % ep->ep.maxpacket);
1328 is_short = (len % ep->ep.maxpacket) != 0;
1330 len = dummy_perform_transfer(urb, req, len);
1332 ep->last_io = jiffies;
1334 req->req.status = len;
1337 urb->actual_length += len;
1338 req->req.actual += len;
1342 /* short packets terminate, maybe with overflow/underflow.
1343 * it's only really an error to write too much.
1345 * partially filling a buffer optionally blocks queue advances
1346 * (so completion handlers can clean up the queue) but we don't
1347 * need to emulate such data-in-flight.
1350 if (host_len == dev_len) {
1351 req->req.status = 0;
1353 } else if (to_host) {
1354 req->req.status = 0;
1355 if (dev_len > host_len)
1356 *status = -EOVERFLOW;
1359 } else if (!to_host) {
1361 if (host_len > dev_len)
1362 req->req.status = -EOVERFLOW;
1364 req->req.status = 0;
1367 /* many requests terminate without a short packet */
1369 if (req->req.length == req->req.actual
1371 req->req.status = 0;
1372 if (urb->transfer_buffer_length == urb->actual_length
1373 && !(urb->transfer_flags
1378 /* device side completion --> continuable */
1379 if (req->req.status != -EINPROGRESS) {
1380 list_del_init(&req->queue);
1382 spin_unlock(&dum->lock);
1383 usb_gadget_giveback_request(&ep->ep, &req->req);
1384 spin_lock(&dum->lock);
1386 /* requests might have been unlinked... */
1390 /* host side completion --> terminate */
1391 if (*status != -EINPROGRESS)
1394 /* rescan to continue with any other queued i/o */
1401 static int periodic_bytes(struct dummy *dum, struct dummy_ep *ep)
1403 int limit = ep->ep.maxpacket;
1405 if (dum->gadget.speed == USB_SPEED_HIGH) {
1408 /* high bandwidth mode */
1409 tmp = usb_endpoint_maxp(ep->desc);
1410 tmp = (tmp >> 11) & 0x03;
1411 tmp *= 8 /* applies to entire frame */;
1412 limit += limit * tmp;
1414 if (dum->gadget.speed == USB_SPEED_SUPER) {
1415 switch (usb_endpoint_type(ep->desc)) {
1416 case USB_ENDPOINT_XFER_ISOC:
1417 /* Sec. 4.4.8.2 USB3.0 Spec */
1418 limit = 3 * 16 * 1024 * 8;
1420 case USB_ENDPOINT_XFER_INT:
1421 /* Sec. 4.4.7.2 USB3.0 Spec */
1422 limit = 3 * 1024 * 8;
1424 case USB_ENDPOINT_XFER_BULK:
1432 #define is_active(dum_hcd) ((dum_hcd->port_status & \
1433 (USB_PORT_STAT_CONNECTION | USB_PORT_STAT_ENABLE | \
1434 USB_PORT_STAT_SUSPEND)) \
1435 == (USB_PORT_STAT_CONNECTION | USB_PORT_STAT_ENABLE))
1437 static struct dummy_ep *find_endpoint(struct dummy *dum, u8 address)
1441 if (!is_active((dum->gadget.speed == USB_SPEED_SUPER ?
1442 dum->ss_hcd : dum->hs_hcd)))
1444 if ((address & ~USB_DIR_IN) == 0)
1446 for (i = 1; i < DUMMY_ENDPOINTS; i++) {
1447 struct dummy_ep *ep = &dum->ep[i];
1451 if (ep->desc->bEndpointAddress == address)
1459 #define Dev_Request (USB_TYPE_STANDARD | USB_RECIP_DEVICE)
1460 #define Dev_InRequest (Dev_Request | USB_DIR_IN)
1461 #define Intf_Request (USB_TYPE_STANDARD | USB_RECIP_INTERFACE)
1462 #define Intf_InRequest (Intf_Request | USB_DIR_IN)
1463 #define Ep_Request (USB_TYPE_STANDARD | USB_RECIP_ENDPOINT)
1464 #define Ep_InRequest (Ep_Request | USB_DIR_IN)
1468 * handle_control_request() - handles all control transfers
1469 * @dum: pointer to dummy (the_controller)
1470 * @urb: the urb request to handle
1471 * @setup: pointer to the setup data for a USB device control
1473 * @status: pointer to request handling status
1475 * Return 0 - if the request was handled
1476 * 1 - if the request wasn't handles
1477 * error code on error
1479 static int handle_control_request(struct dummy_hcd *dum_hcd, struct urb *urb,
1480 struct usb_ctrlrequest *setup,
1483 struct dummy_ep *ep2;
1484 struct dummy *dum = dum_hcd->dum;
1489 w_index = le16_to_cpu(setup->wIndex);
1490 w_value = le16_to_cpu(setup->wValue);
1491 switch (setup->bRequest) {
1492 case USB_REQ_SET_ADDRESS:
1493 if (setup->bRequestType != Dev_Request)
1495 dum->address = w_value;
1497 dev_dbg(udc_dev(dum), "set_address = %d\n",
1501 case USB_REQ_SET_FEATURE:
1502 if (setup->bRequestType == Dev_Request) {
1505 case USB_DEVICE_REMOTE_WAKEUP:
1507 case USB_DEVICE_B_HNP_ENABLE:
1508 dum->gadget.b_hnp_enable = 1;
1510 case USB_DEVICE_A_HNP_SUPPORT:
1511 dum->gadget.a_hnp_support = 1;
1513 case USB_DEVICE_A_ALT_HNP_SUPPORT:
1514 dum->gadget.a_alt_hnp_support = 1;
1516 case USB_DEVICE_U1_ENABLE:
1517 if (dummy_hcd_to_hcd(dum_hcd)->speed ==
1519 w_value = USB_DEV_STAT_U1_ENABLED;
1521 ret_val = -EOPNOTSUPP;
1523 case USB_DEVICE_U2_ENABLE:
1524 if (dummy_hcd_to_hcd(dum_hcd)->speed ==
1526 w_value = USB_DEV_STAT_U2_ENABLED;
1528 ret_val = -EOPNOTSUPP;
1530 case USB_DEVICE_LTM_ENABLE:
1531 if (dummy_hcd_to_hcd(dum_hcd)->speed ==
1533 w_value = USB_DEV_STAT_LTM_ENABLED;
1535 ret_val = -EOPNOTSUPP;
1538 ret_val = -EOPNOTSUPP;
1541 dum->devstatus |= (1 << w_value);
1544 } else if (setup->bRequestType == Ep_Request) {
1546 ep2 = find_endpoint(dum, w_index);
1547 if (!ep2 || ep2->ep.name == ep0name) {
1548 ret_val = -EOPNOTSUPP;
1556 case USB_REQ_CLEAR_FEATURE:
1557 if (setup->bRequestType == Dev_Request) {
1560 case USB_DEVICE_REMOTE_WAKEUP:
1561 w_value = USB_DEVICE_REMOTE_WAKEUP;
1563 case USB_DEVICE_U1_ENABLE:
1564 if (dummy_hcd_to_hcd(dum_hcd)->speed ==
1566 w_value = USB_DEV_STAT_U1_ENABLED;
1568 ret_val = -EOPNOTSUPP;
1570 case USB_DEVICE_U2_ENABLE:
1571 if (dummy_hcd_to_hcd(dum_hcd)->speed ==
1573 w_value = USB_DEV_STAT_U2_ENABLED;
1575 ret_val = -EOPNOTSUPP;
1577 case USB_DEVICE_LTM_ENABLE:
1578 if (dummy_hcd_to_hcd(dum_hcd)->speed ==
1580 w_value = USB_DEV_STAT_LTM_ENABLED;
1582 ret_val = -EOPNOTSUPP;
1585 ret_val = -EOPNOTSUPP;
1589 dum->devstatus &= ~(1 << w_value);
1592 } else if (setup->bRequestType == Ep_Request) {
1594 ep2 = find_endpoint(dum, w_index);
1596 ret_val = -EOPNOTSUPP;
1605 case USB_REQ_GET_STATUS:
1606 if (setup->bRequestType == Dev_InRequest
1607 || setup->bRequestType == Intf_InRequest
1608 || setup->bRequestType == Ep_InRequest) {
1611 * device: remote wakeup, selfpowered
1612 * interface: nothing
1615 buf = (char *)urb->transfer_buffer;
1616 if (urb->transfer_buffer_length > 0) {
1617 if (setup->bRequestType == Ep_InRequest) {
1618 ep2 = find_endpoint(dum, w_index);
1620 ret_val = -EOPNOTSUPP;
1623 buf[0] = ep2->halted;
1624 } else if (setup->bRequestType ==
1626 buf[0] = (u8)dum->devstatus;
1630 if (urb->transfer_buffer_length > 1)
1632 urb->actual_length = min_t(u32, 2,
1633 urb->transfer_buffer_length);
1642 /* drive both sides of the transfers; looks like irq handlers to
1643 * both drivers except the callbacks aren't in_irq().
1645 static void dummy_timer(unsigned long _dum_hcd)
1647 struct dummy_hcd *dum_hcd = (struct dummy_hcd *) _dum_hcd;
1648 struct dummy *dum = dum_hcd->dum;
1649 struct urbp *urbp, *tmp;
1650 unsigned long flags;
1654 /* simplistic model for one frame's bandwidth */
1655 switch (dum->gadget.speed) {
1657 total = 8/*bytes*/ * 12/*packets*/;
1659 case USB_SPEED_FULL:
1660 total = 64/*bytes*/ * 19/*packets*/;
1662 case USB_SPEED_HIGH:
1663 total = 512/*bytes*/ * 13/*packets*/ * 8/*uframes*/;
1665 case USB_SPEED_SUPER:
1666 /* Bus speed is 500000 bytes/ms, so use a little less */
1670 dev_err(dummy_dev(dum_hcd), "bogus device speed\n");
1674 /* FIXME if HZ != 1000 this will probably misbehave ... */
1676 /* look at each urb queued by the host side driver */
1677 spin_lock_irqsave(&dum->lock, flags);
1679 if (!dum_hcd->udev) {
1680 dev_err(dummy_dev(dum_hcd),
1681 "timer fired with no URBs pending?\n");
1682 spin_unlock_irqrestore(&dum->lock, flags);
1686 for (i = 0; i < DUMMY_ENDPOINTS; i++) {
1689 dum->ep[i].already_seen = 0;
1693 list_for_each_entry_safe(urbp, tmp, &dum_hcd->urbp_list, urbp_list) {
1695 struct dummy_request *req;
1697 struct dummy_ep *ep = NULL;
1699 int status = -EINPROGRESS;
1704 else if (dum_hcd->rh_state != DUMMY_RH_RUNNING)
1706 type = usb_pipetype(urb->pipe);
1708 /* used up this frame's non-periodic bandwidth?
1709 * FIXME there's infinite bandwidth for control and
1710 * periodic transfers ... unrealistic.
1712 if (total <= 0 && type == PIPE_BULK)
1715 /* find the gadget's ep for this request (if configured) */
1716 address = usb_pipeendpoint (urb->pipe);
1717 if (usb_pipein(urb->pipe))
1718 address |= USB_DIR_IN;
1719 ep = find_endpoint(dum, address);
1721 /* set_configuration() disagreement */
1722 dev_dbg(dummy_dev(dum_hcd),
1723 "no ep configured for urb %p\n",
1729 if (ep->already_seen)
1731 ep->already_seen = 1;
1732 if (ep == &dum->ep[0] && urb->error_count) {
1733 ep->setup_stage = 1; /* a new urb */
1734 urb->error_count = 0;
1736 if (ep->halted && !ep->setup_stage) {
1737 /* NOTE: must not be iso! */
1738 dev_dbg(dummy_dev(dum_hcd), "ep %s halted, urb %p\n",
1743 /* FIXME make sure both ends agree on maxpacket */
1745 /* handle control requests */
1746 if (ep == &dum->ep[0] && ep->setup_stage) {
1747 struct usb_ctrlrequest setup;
1750 setup = *(struct usb_ctrlrequest *) urb->setup_packet;
1751 /* paranoia, in case of stale queued data */
1752 list_for_each_entry(req, &ep->queue, queue) {
1753 list_del_init(&req->queue);
1754 req->req.status = -EOVERFLOW;
1755 dev_dbg(udc_dev(dum), "stale req = %p\n",
1758 spin_unlock(&dum->lock);
1759 usb_gadget_giveback_request(&ep->ep, &req->req);
1760 spin_lock(&dum->lock);
1761 ep->already_seen = 0;
1765 /* gadget driver never sees set_address or operations
1766 * on standard feature flags. some hardware doesn't
1769 ep->last_io = jiffies;
1770 ep->setup_stage = 0;
1773 value = handle_control_request(dum_hcd, urb, &setup,
1776 /* gadget driver handles all other requests. block
1777 * until setup() returns; no reentrancy issues etc.
1780 spin_unlock(&dum->lock);
1781 value = dum->driver->setup(&dum->gadget,
1783 spin_lock(&dum->lock);
1786 /* no delays (max 64KB data stage) */
1788 goto treat_control_like_bulk;
1790 /* error, see below */
1794 if (value != -EOPNOTSUPP)
1795 dev_dbg(udc_dev(dum),
1799 urb->actual_length = 0;
1805 /* non-control requests */
1807 switch (usb_pipetype(urb->pipe)) {
1808 case PIPE_ISOCHRONOUS:
1809 /* FIXME is it urb->interval since the last xfer?
1810 * use urb->iso_frame_desc[i].
1811 * complete whether or not ep has requests queued.
1812 * report random errors, to debug drivers.
1814 limit = max(limit, periodic_bytes(dum, ep));
1818 case PIPE_INTERRUPT:
1819 /* FIXME is it urb->interval since the last xfer?
1820 * this almost certainly polls too fast.
1822 limit = max(limit, periodic_bytes(dum, ep));
1826 treat_control_like_bulk:
1827 ep->last_io = jiffies;
1828 total = transfer(dum_hcd, urb, ep, limit, &status);
1832 /* incomplete transfer? */
1833 if (status == -EINPROGRESS)
1837 list_del(&urbp->urbp_list);
1840 ep->already_seen = ep->setup_stage = 0;
1842 usb_hcd_unlink_urb_from_ep(dummy_hcd_to_hcd(dum_hcd), urb);
1843 spin_unlock(&dum->lock);
1844 usb_hcd_giveback_urb(dummy_hcd_to_hcd(dum_hcd), urb, status);
1845 spin_lock(&dum->lock);
1850 if (list_empty(&dum_hcd->urbp_list)) {
1851 usb_put_dev(dum_hcd->udev);
1852 dum_hcd->udev = NULL;
1853 } else if (dum_hcd->rh_state == DUMMY_RH_RUNNING) {
1854 /* want a 1 msec delay here */
1855 mod_timer(&dum_hcd->timer, jiffies + msecs_to_jiffies(1));
1858 spin_unlock_irqrestore(&dum->lock, flags);
1861 /*-------------------------------------------------------------------------*/
1863 #define PORT_C_MASK \
1864 ((USB_PORT_STAT_C_CONNECTION \
1865 | USB_PORT_STAT_C_ENABLE \
1866 | USB_PORT_STAT_C_SUSPEND \
1867 | USB_PORT_STAT_C_OVERCURRENT \
1868 | USB_PORT_STAT_C_RESET) << 16)
1870 static int dummy_hub_status(struct usb_hcd *hcd, char *buf)
1872 struct dummy_hcd *dum_hcd;
1873 unsigned long flags;
1876 dum_hcd = hcd_to_dummy_hcd(hcd);
1878 spin_lock_irqsave(&dum_hcd->dum->lock, flags);
1879 if (!HCD_HW_ACCESSIBLE(hcd))
1882 if (dum_hcd->resuming && time_after_eq(jiffies, dum_hcd->re_timeout)) {
1883 dum_hcd->port_status |= (USB_PORT_STAT_C_SUSPEND << 16);
1884 dum_hcd->port_status &= ~USB_PORT_STAT_SUSPEND;
1885 set_link_state(dum_hcd);
1888 if ((dum_hcd->port_status & PORT_C_MASK) != 0) {
1890 dev_dbg(dummy_dev(dum_hcd), "port status 0x%08x has changes\n",
1891 dum_hcd->port_status);
1893 if (dum_hcd->rh_state == DUMMY_RH_SUSPENDED)
1894 usb_hcd_resume_root_hub(hcd);
1897 spin_unlock_irqrestore(&dum_hcd->dum->lock, flags);
1901 /* usb 3.0 root hub device descriptor */
1903 struct usb_bos_descriptor bos;
1904 struct usb_ss_cap_descriptor ss_cap;
1905 } __packed usb3_bos_desc = {
1908 .bLength = USB_DT_BOS_SIZE,
1909 .bDescriptorType = USB_DT_BOS,
1910 .wTotalLength = cpu_to_le16(sizeof(usb3_bos_desc)),
1911 .bNumDeviceCaps = 1,
1914 .bLength = USB_DT_USB_SS_CAP_SIZE,
1915 .bDescriptorType = USB_DT_DEVICE_CAPABILITY,
1916 .bDevCapabilityType = USB_SS_CAP_TYPE,
1917 .wSpeedSupported = cpu_to_le16(USB_5GBPS_OPERATION),
1918 .bFunctionalitySupport = ilog2(USB_5GBPS_OPERATION),
1923 ss_hub_descriptor(struct usb_hub_descriptor *desc)
1925 memset(desc, 0, sizeof *desc);
1926 desc->bDescriptorType = 0x2a;
1927 desc->bDescLength = 12;
1928 desc->wHubCharacteristics = cpu_to_le16(
1929 HUB_CHAR_INDV_PORT_LPSM |
1930 HUB_CHAR_COMMON_OCPM);
1931 desc->bNbrPorts = 1;
1932 desc->u.ss.bHubHdrDecLat = 0x04; /* Worst case: 0.4 micro sec*/
1933 desc->u.ss.DeviceRemovable = 0xffff;
1936 static inline void hub_descriptor(struct usb_hub_descriptor *desc)
1938 memset(desc, 0, sizeof *desc);
1939 desc->bDescriptorType = 0x29;
1940 desc->bDescLength = 9;
1941 desc->wHubCharacteristics = cpu_to_le16(
1942 HUB_CHAR_INDV_PORT_LPSM |
1943 HUB_CHAR_COMMON_OCPM);
1944 desc->bNbrPorts = 1;
1945 desc->u.hs.DeviceRemovable[0] = 0xff;
1946 desc->u.hs.DeviceRemovable[1] = 0xff;
1949 static int dummy_hub_control(
1950 struct usb_hcd *hcd,
1957 struct dummy_hcd *dum_hcd;
1959 unsigned long flags;
1961 if (!HCD_HW_ACCESSIBLE(hcd))
1964 dum_hcd = hcd_to_dummy_hcd(hcd);
1966 spin_lock_irqsave(&dum_hcd->dum->lock, flags);
1968 case ClearHubFeature:
1970 case ClearPortFeature:
1972 case USB_PORT_FEAT_SUSPEND:
1973 if (hcd->speed == HCD_USB3) {
1974 dev_dbg(dummy_dev(dum_hcd),
1975 "USB_PORT_FEAT_SUSPEND req not "
1976 "supported for USB 3.0 roothub\n");
1979 if (dum_hcd->port_status & USB_PORT_STAT_SUSPEND) {
1980 /* 20msec resume signaling */
1981 dum_hcd->resuming = 1;
1982 dum_hcd->re_timeout = jiffies +
1983 msecs_to_jiffies(20);
1986 case USB_PORT_FEAT_POWER:
1987 if (hcd->speed == HCD_USB3) {
1988 if (dum_hcd->port_status & USB_PORT_STAT_POWER)
1989 dev_dbg(dummy_dev(dum_hcd),
1992 if (dum_hcd->port_status &
1993 USB_SS_PORT_STAT_POWER)
1994 dev_dbg(dummy_dev(dum_hcd),
1998 dum_hcd->port_status &= ~(1 << wValue);
1999 set_link_state(dum_hcd);
2002 case GetHubDescriptor:
2003 if (hcd->speed == HCD_USB3 &&
2004 (wLength < USB_DT_SS_HUB_SIZE ||
2005 wValue != (USB_DT_SS_HUB << 8))) {
2006 dev_dbg(dummy_dev(dum_hcd),
2007 "Wrong hub descriptor type for "
2008 "USB 3.0 roothub.\n");
2011 if (hcd->speed == HCD_USB3)
2012 ss_hub_descriptor((struct usb_hub_descriptor *) buf);
2014 hub_descriptor((struct usb_hub_descriptor *) buf);
2017 case DeviceRequest | USB_REQ_GET_DESCRIPTOR:
2018 if (hcd->speed != HCD_USB3)
2021 if ((wValue >> 8) != USB_DT_BOS)
2024 memcpy(buf, &usb3_bos_desc, sizeof(usb3_bos_desc));
2025 retval = sizeof(usb3_bos_desc);
2029 *(__le32 *) buf = cpu_to_le32(0);
2035 /* whoever resets or resumes must GetPortStatus to
2038 if (dum_hcd->resuming &&
2039 time_after_eq(jiffies, dum_hcd->re_timeout)) {
2040 dum_hcd->port_status |= (USB_PORT_STAT_C_SUSPEND << 16);
2041 dum_hcd->port_status &= ~USB_PORT_STAT_SUSPEND;
2043 if ((dum_hcd->port_status & USB_PORT_STAT_RESET) != 0 &&
2044 time_after_eq(jiffies, dum_hcd->re_timeout)) {
2045 dum_hcd->port_status |= (USB_PORT_STAT_C_RESET << 16);
2046 dum_hcd->port_status &= ~USB_PORT_STAT_RESET;
2047 if (dum_hcd->dum->pullup) {
2048 dum_hcd->port_status |= USB_PORT_STAT_ENABLE;
2050 if (hcd->speed < HCD_USB3) {
2051 switch (dum_hcd->dum->gadget.speed) {
2052 case USB_SPEED_HIGH:
2053 dum_hcd->port_status |=
2054 USB_PORT_STAT_HIGH_SPEED;
2057 dum_hcd->dum->gadget.ep0->
2059 dum_hcd->port_status |=
2060 USB_PORT_STAT_LOW_SPEED;
2063 dum_hcd->dum->gadget.speed =
2070 set_link_state(dum_hcd);
2071 ((__le16 *) buf)[0] = cpu_to_le16(dum_hcd->port_status);
2072 ((__le16 *) buf)[1] = cpu_to_le16(dum_hcd->port_status >> 16);
2077 case SetPortFeature:
2079 case USB_PORT_FEAT_LINK_STATE:
2080 if (hcd->speed != HCD_USB3) {
2081 dev_dbg(dummy_dev(dum_hcd),
2082 "USB_PORT_FEAT_LINK_STATE req not "
2083 "supported for USB 2.0 roothub\n");
2087 * Since this is dummy we don't have an actual link so
2088 * there is nothing to do for the SET_LINK_STATE cmd
2091 case USB_PORT_FEAT_U1_TIMEOUT:
2092 case USB_PORT_FEAT_U2_TIMEOUT:
2093 /* TODO: add suspend/resume support! */
2094 if (hcd->speed != HCD_USB3) {
2095 dev_dbg(dummy_dev(dum_hcd),
2096 "USB_PORT_FEAT_U1/2_TIMEOUT req not "
2097 "supported for USB 2.0 roothub\n");
2101 case USB_PORT_FEAT_SUSPEND:
2102 /* Applicable only for USB2.0 hub */
2103 if (hcd->speed == HCD_USB3) {
2104 dev_dbg(dummy_dev(dum_hcd),
2105 "USB_PORT_FEAT_SUSPEND req not "
2106 "supported for USB 3.0 roothub\n");
2109 if (dum_hcd->active) {
2110 dum_hcd->port_status |= USB_PORT_STAT_SUSPEND;
2112 /* HNP would happen here; for now we
2113 * assume b_bus_req is always true.
2115 set_link_state(dum_hcd);
2116 if (((1 << USB_DEVICE_B_HNP_ENABLE)
2117 & dum_hcd->dum->devstatus) != 0)
2118 dev_dbg(dummy_dev(dum_hcd),
2122 case USB_PORT_FEAT_POWER:
2123 if (hcd->speed == HCD_USB3)
2124 dum_hcd->port_status |= USB_SS_PORT_STAT_POWER;
2126 dum_hcd->port_status |= USB_PORT_STAT_POWER;
2127 set_link_state(dum_hcd);
2129 case USB_PORT_FEAT_BH_PORT_RESET:
2130 /* Applicable only for USB3.0 hub */
2131 if (hcd->speed != HCD_USB3) {
2132 dev_dbg(dummy_dev(dum_hcd),
2133 "USB_PORT_FEAT_BH_PORT_RESET req not "
2134 "supported for USB 2.0 roothub\n");
2138 case USB_PORT_FEAT_RESET:
2139 /* if it's already enabled, disable */
2140 if (hcd->speed == HCD_USB3) {
2141 dum_hcd->port_status = 0;
2142 dum_hcd->port_status =
2143 (USB_SS_PORT_STAT_POWER |
2144 USB_PORT_STAT_CONNECTION |
2145 USB_PORT_STAT_RESET);
2147 dum_hcd->port_status &= ~(USB_PORT_STAT_ENABLE
2148 | USB_PORT_STAT_LOW_SPEED
2149 | USB_PORT_STAT_HIGH_SPEED);
2151 * We want to reset device status. All but the
2152 * Self powered feature
2154 dum_hcd->dum->devstatus &=
2155 (1 << USB_DEVICE_SELF_POWERED);
2157 * FIXME USB3.0: what is the correct reset signaling
2158 * interval? Is it still 50msec as for HS?
2160 dum_hcd->re_timeout = jiffies + msecs_to_jiffies(50);
2163 if (hcd->speed == HCD_USB3) {
2164 if ((dum_hcd->port_status &
2165 USB_SS_PORT_STAT_POWER) != 0) {
2166 dum_hcd->port_status |= (1 << wValue);
2167 set_link_state(dum_hcd);
2170 if ((dum_hcd->port_status &
2171 USB_PORT_STAT_POWER) != 0) {
2172 dum_hcd->port_status |= (1 << wValue);
2173 set_link_state(dum_hcd);
2177 case GetPortErrorCount:
2178 if (hcd->speed != HCD_USB3) {
2179 dev_dbg(dummy_dev(dum_hcd),
2180 "GetPortErrorCount req not "
2181 "supported for USB 2.0 roothub\n");
2184 /* We'll always return 0 since this is a dummy hub */
2185 *(__le32 *) buf = cpu_to_le32(0);
2188 if (hcd->speed != HCD_USB3) {
2189 dev_dbg(dummy_dev(dum_hcd),
2190 "SetHubDepth req not supported for "
2191 "USB 2.0 roothub\n");
2196 dev_dbg(dummy_dev(dum_hcd),
2197 "hub control req%04x v%04x i%04x l%d\n",
2198 typeReq, wValue, wIndex, wLength);
2200 /* "protocol stall" on error */
2203 spin_unlock_irqrestore(&dum_hcd->dum->lock, flags);
2205 if ((dum_hcd->port_status & PORT_C_MASK) != 0)
2206 usb_hcd_poll_rh_status(hcd);
2210 static int dummy_bus_suspend(struct usb_hcd *hcd)
2212 struct dummy_hcd *dum_hcd = hcd_to_dummy_hcd(hcd);
2214 dev_dbg(&hcd->self.root_hub->dev, "%s\n", __func__);
2216 spin_lock_irq(&dum_hcd->dum->lock);
2217 dum_hcd->rh_state = DUMMY_RH_SUSPENDED;
2218 set_link_state(dum_hcd);
2219 hcd->state = HC_STATE_SUSPENDED;
2220 spin_unlock_irq(&dum_hcd->dum->lock);
2224 static int dummy_bus_resume(struct usb_hcd *hcd)
2226 struct dummy_hcd *dum_hcd = hcd_to_dummy_hcd(hcd);
2229 dev_dbg(&hcd->self.root_hub->dev, "%s\n", __func__);
2231 spin_lock_irq(&dum_hcd->dum->lock);
2232 if (!HCD_HW_ACCESSIBLE(hcd)) {
2235 dum_hcd->rh_state = DUMMY_RH_RUNNING;
2236 set_link_state(dum_hcd);
2237 if (!list_empty(&dum_hcd->urbp_list))
2238 mod_timer(&dum_hcd->timer, jiffies);
2239 hcd->state = HC_STATE_RUNNING;
2241 spin_unlock_irq(&dum_hcd->dum->lock);
2245 /*-------------------------------------------------------------------------*/
2247 static inline ssize_t show_urb(char *buf, size_t size, struct urb *urb)
2249 int ep = usb_pipeendpoint(urb->pipe);
2251 return snprintf(buf, size,
2252 "urb/%p %s ep%d%s%s len %d/%d\n",
2255 switch (urb->dev->speed) {
2259 case USB_SPEED_FULL:
2262 case USB_SPEED_HIGH:
2265 case USB_SPEED_SUPER:
2272 ep, ep ? (usb_pipein(urb->pipe) ? "in" : "out") : "",
2274 switch (usb_pipetype(urb->pipe)) { \
2275 case PIPE_CONTROL: \
2281 case PIPE_INTERRUPT: \
2288 urb->actual_length, urb->transfer_buffer_length);
2291 static ssize_t urbs_show(struct device *dev, struct device_attribute *attr,
2294 struct usb_hcd *hcd = dev_get_drvdata(dev);
2295 struct dummy_hcd *dum_hcd = hcd_to_dummy_hcd(hcd);
2298 unsigned long flags;
2300 spin_lock_irqsave(&dum_hcd->dum->lock, flags);
2301 list_for_each_entry(urbp, &dum_hcd->urbp_list, urbp_list) {
2304 temp = show_urb(buf, PAGE_SIZE - size, urbp->urb);
2308 spin_unlock_irqrestore(&dum_hcd->dum->lock, flags);
2312 static DEVICE_ATTR_RO(urbs);
2314 static int dummy_start_ss(struct dummy_hcd *dum_hcd)
2316 init_timer(&dum_hcd->timer);
2317 dum_hcd->timer.function = dummy_timer;
2318 dum_hcd->timer.data = (unsigned long)dum_hcd;
2319 dum_hcd->rh_state = DUMMY_RH_RUNNING;
2320 dum_hcd->stream_en_ep = 0;
2321 INIT_LIST_HEAD(&dum_hcd->urbp_list);
2322 dummy_hcd_to_hcd(dum_hcd)->power_budget = POWER_BUDGET;
2323 dummy_hcd_to_hcd(dum_hcd)->state = HC_STATE_RUNNING;
2324 dummy_hcd_to_hcd(dum_hcd)->uses_new_polling = 1;
2325 #ifdef CONFIG_USB_OTG
2326 dummy_hcd_to_hcd(dum_hcd)->self.otg_port = 1;
2330 /* FIXME 'urbs' should be a per-device thing, maybe in usbcore */
2331 return device_create_file(dummy_dev(dum_hcd), &dev_attr_urbs);
2334 static int dummy_start(struct usb_hcd *hcd)
2336 struct dummy_hcd *dum_hcd = hcd_to_dummy_hcd(hcd);
2339 * MASTER side init ... we emulate a root hub that'll only ever
2340 * talk to one device (the slave side). Also appears in sysfs,
2341 * just like more familiar pci-based HCDs.
2343 if (!usb_hcd_is_primary_hcd(hcd))
2344 return dummy_start_ss(dum_hcd);
2346 spin_lock_init(&dum_hcd->dum->lock);
2347 init_timer(&dum_hcd->timer);
2348 dum_hcd->timer.function = dummy_timer;
2349 dum_hcd->timer.data = (unsigned long)dum_hcd;
2350 dum_hcd->rh_state = DUMMY_RH_RUNNING;
2352 INIT_LIST_HEAD(&dum_hcd->urbp_list);
2354 hcd->power_budget = POWER_BUDGET;
2355 hcd->state = HC_STATE_RUNNING;
2356 hcd->uses_new_polling = 1;
2358 #ifdef CONFIG_USB_OTG
2359 hcd->self.otg_port = 1;
2362 /* FIXME 'urbs' should be a per-device thing, maybe in usbcore */
2363 return device_create_file(dummy_dev(dum_hcd), &dev_attr_urbs);
2366 static void dummy_stop(struct usb_hcd *hcd)
2370 dum = hcd_to_dummy_hcd(hcd)->dum;
2371 device_remove_file(dummy_dev(hcd_to_dummy_hcd(hcd)), &dev_attr_urbs);
2372 dev_info(dummy_dev(hcd_to_dummy_hcd(hcd)), "stopped\n");
2375 /*-------------------------------------------------------------------------*/
2377 static int dummy_h_get_frame(struct usb_hcd *hcd)
2379 return dummy_g_get_frame(NULL);
2382 static int dummy_setup(struct usb_hcd *hcd)
2386 dum = *((void **)dev_get_platdata(hcd->self.controller));
2387 hcd->self.sg_tablesize = ~0;
2388 if (usb_hcd_is_primary_hcd(hcd)) {
2389 dum->hs_hcd = hcd_to_dummy_hcd(hcd);
2390 dum->hs_hcd->dum = dum;
2392 * Mark the first roothub as being USB 2.0.
2393 * The USB 3.0 roothub will be registered later by
2396 hcd->speed = HCD_USB2;
2397 hcd->self.root_hub->speed = USB_SPEED_HIGH;
2399 dum->ss_hcd = hcd_to_dummy_hcd(hcd);
2400 dum->ss_hcd->dum = dum;
2401 hcd->speed = HCD_USB3;
2402 hcd->self.root_hub->speed = USB_SPEED_SUPER;
2407 /* Change a group of bulk endpoints to support multiple stream IDs */
2408 static int dummy_alloc_streams(struct usb_hcd *hcd, struct usb_device *udev,
2409 struct usb_host_endpoint **eps, unsigned int num_eps,
2410 unsigned int num_streams, gfp_t mem_flags)
2412 struct dummy_hcd *dum_hcd = hcd_to_dummy_hcd(hcd);
2413 unsigned long flags;
2415 int ret_streams = num_streams;
2422 spin_lock_irqsave(&dum_hcd->dum->lock, flags);
2423 for (i = 0; i < num_eps; i++) {
2424 index = dummy_get_ep_idx(&eps[i]->desc);
2425 if ((1 << index) & dum_hcd->stream_en_ep) {
2426 ret_streams = -EINVAL;
2429 max_stream = usb_ss_max_streams(&eps[i]->ss_ep_comp);
2431 ret_streams = -EINVAL;
2434 if (max_stream < ret_streams) {
2435 dev_dbg(dummy_dev(dum_hcd), "Ep 0x%x only supports %u "
2437 eps[i]->desc.bEndpointAddress,
2439 ret_streams = max_stream;
2443 for (i = 0; i < num_eps; i++) {
2444 index = dummy_get_ep_idx(&eps[i]->desc);
2445 dum_hcd->stream_en_ep |= 1 << index;
2446 set_max_streams_for_pipe(dum_hcd,
2447 usb_endpoint_num(&eps[i]->desc), ret_streams);
2450 spin_unlock_irqrestore(&dum_hcd->dum->lock, flags);
2454 /* Reverts a group of bulk endpoints back to not using stream IDs. */
2455 static int dummy_free_streams(struct usb_hcd *hcd, struct usb_device *udev,
2456 struct usb_host_endpoint **eps, unsigned int num_eps,
2459 struct dummy_hcd *dum_hcd = hcd_to_dummy_hcd(hcd);
2460 unsigned long flags;
2465 spin_lock_irqsave(&dum_hcd->dum->lock, flags);
2466 for (i = 0; i < num_eps; i++) {
2467 index = dummy_get_ep_idx(&eps[i]->desc);
2468 if (!((1 << index) & dum_hcd->stream_en_ep)) {
2474 for (i = 0; i < num_eps; i++) {
2475 index = dummy_get_ep_idx(&eps[i]->desc);
2476 dum_hcd->stream_en_ep &= ~(1 << index);
2477 set_max_streams_for_pipe(dum_hcd,
2478 usb_endpoint_num(&eps[i]->desc), 0);
2482 spin_unlock_irqrestore(&dum_hcd->dum->lock, flags);
2486 static struct hc_driver dummy_hcd = {
2487 .description = (char *) driver_name,
2488 .product_desc = "Dummy host controller",
2489 .hcd_priv_size = sizeof(struct dummy_hcd),
2491 .flags = HCD_USB3 | HCD_SHARED,
2493 .reset = dummy_setup,
2494 .start = dummy_start,
2497 .urb_enqueue = dummy_urb_enqueue,
2498 .urb_dequeue = dummy_urb_dequeue,
2500 .get_frame_number = dummy_h_get_frame,
2502 .hub_status_data = dummy_hub_status,
2503 .hub_control = dummy_hub_control,
2504 .bus_suspend = dummy_bus_suspend,
2505 .bus_resume = dummy_bus_resume,
2507 .alloc_streams = dummy_alloc_streams,
2508 .free_streams = dummy_free_streams,
2511 static int dummy_hcd_probe(struct platform_device *pdev)
2514 struct usb_hcd *hs_hcd;
2515 struct usb_hcd *ss_hcd;
2518 dev_info(&pdev->dev, "%s, driver " DRIVER_VERSION "\n", driver_desc);
2519 dum = *((void **)dev_get_platdata(&pdev->dev));
2521 if (!mod_data.is_super_speed)
2522 dummy_hcd.flags = HCD_USB2;
2523 hs_hcd = usb_create_hcd(&dummy_hcd, &pdev->dev, dev_name(&pdev->dev));
2528 retval = usb_add_hcd(hs_hcd, 0, 0);
2532 if (mod_data.is_super_speed) {
2533 ss_hcd = usb_create_shared_hcd(&dummy_hcd, &pdev->dev,
2534 dev_name(&pdev->dev), hs_hcd);
2537 goto dealloc_usb2_hcd;
2540 retval = usb_add_hcd(ss_hcd, 0, 0);
2547 usb_put_hcd(ss_hcd);
2549 usb_remove_hcd(hs_hcd);
2551 usb_put_hcd(hs_hcd);
2552 dum->hs_hcd = dum->ss_hcd = NULL;
2556 static int dummy_hcd_remove(struct platform_device *pdev)
2560 dum = hcd_to_dummy_hcd(platform_get_drvdata(pdev))->dum;
2563 usb_remove_hcd(dummy_hcd_to_hcd(dum->ss_hcd));
2564 usb_put_hcd(dummy_hcd_to_hcd(dum->ss_hcd));
2567 usb_remove_hcd(dummy_hcd_to_hcd(dum->hs_hcd));
2568 usb_put_hcd(dummy_hcd_to_hcd(dum->hs_hcd));
2576 static int dummy_hcd_suspend(struct platform_device *pdev, pm_message_t state)
2578 struct usb_hcd *hcd;
2579 struct dummy_hcd *dum_hcd;
2582 dev_dbg(&pdev->dev, "%s\n", __func__);
2584 hcd = platform_get_drvdata(pdev);
2585 dum_hcd = hcd_to_dummy_hcd(hcd);
2586 if (dum_hcd->rh_state == DUMMY_RH_RUNNING) {
2587 dev_warn(&pdev->dev, "Root hub isn't suspended!\n");
2590 clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
2594 static int dummy_hcd_resume(struct platform_device *pdev)
2596 struct usb_hcd *hcd;
2598 dev_dbg(&pdev->dev, "%s\n", __func__);
2600 hcd = platform_get_drvdata(pdev);
2601 set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
2602 usb_hcd_poll_rh_status(hcd);
2606 static struct platform_driver dummy_hcd_driver = {
2607 .probe = dummy_hcd_probe,
2608 .remove = dummy_hcd_remove,
2609 .suspend = dummy_hcd_suspend,
2610 .resume = dummy_hcd_resume,
2612 .name = (char *) driver_name,
2616 /*-------------------------------------------------------------------------*/
2617 #define MAX_NUM_UDC 2
2618 static struct platform_device *the_udc_pdev[MAX_NUM_UDC];
2619 static struct platform_device *the_hcd_pdev[MAX_NUM_UDC];
2621 static int __init init(void)
2623 int retval = -ENOMEM;
2625 struct dummy *dum[MAX_NUM_UDC];
2630 if (!mod_data.is_high_speed && mod_data.is_super_speed)
2633 if (mod_data.num < 1 || mod_data.num > MAX_NUM_UDC) {
2634 pr_err("Number of emulated UDC must be in range of 1…%d\n",
2639 for (i = 0; i < mod_data.num; i++) {
2640 the_hcd_pdev[i] = platform_device_alloc(driver_name, i);
2641 if (!the_hcd_pdev[i]) {
2644 platform_device_put(the_hcd_pdev[i--]);
2648 for (i = 0; i < mod_data.num; i++) {
2649 the_udc_pdev[i] = platform_device_alloc(gadget_name, i);
2650 if (!the_udc_pdev[i]) {
2653 platform_device_put(the_udc_pdev[i--]);
2657 for (i = 0; i < mod_data.num; i++) {
2658 dum[i] = kzalloc(sizeof(struct dummy), GFP_KERNEL);
2663 retval = platform_device_add_data(the_hcd_pdev[i], &dum[i],
2667 retval = platform_device_add_data(the_udc_pdev[i], &dum[i],
2673 retval = platform_driver_register(&dummy_hcd_driver);
2676 retval = platform_driver_register(&dummy_udc_driver);
2678 goto err_register_udc_driver;
2680 for (i = 0; i < mod_data.num; i++) {
2681 retval = platform_device_add(the_hcd_pdev[i]);
2685 platform_device_del(the_hcd_pdev[i--]);
2689 for (i = 0; i < mod_data.num; i++) {
2690 if (!dum[i]->hs_hcd ||
2691 (!dum[i]->ss_hcd && mod_data.is_super_speed)) {
2693 * The hcd was added successfully but its probe
2694 * function failed for some reason.
2701 for (i = 0; i < mod_data.num; i++) {
2702 retval = platform_device_add(the_udc_pdev[i]);
2706 platform_device_del(the_udc_pdev[i]);
2711 for (i = 0; i < mod_data.num; i++) {
2712 if (!platform_get_drvdata(the_udc_pdev[i])) {
2714 * The udc was added successfully but its probe
2715 * function failed for some reason.
2724 for (i = 0; i < mod_data.num; i++)
2725 platform_device_del(the_udc_pdev[i]);
2727 for (i = 0; i < mod_data.num; i++)
2728 platform_device_del(the_hcd_pdev[i]);
2730 platform_driver_unregister(&dummy_udc_driver);
2731 err_register_udc_driver:
2732 platform_driver_unregister(&dummy_hcd_driver);
2734 for (i = 0; i < mod_data.num; i++)
2736 for (i = 0; i < mod_data.num; i++)
2737 platform_device_put(the_udc_pdev[i]);
2739 for (i = 0; i < mod_data.num; i++)
2740 platform_device_put(the_hcd_pdev[i]);
2745 static void __exit cleanup(void)
2749 for (i = 0; i < mod_data.num; i++) {
2752 dum = *((void **)dev_get_platdata(&the_udc_pdev[i]->dev));
2754 platform_device_unregister(the_udc_pdev[i]);
2755 platform_device_unregister(the_hcd_pdev[i]);
2758 platform_driver_unregister(&dummy_udc_driver);
2759 platform_driver_unregister(&dummy_hcd_driver);
2761 module_exit(cleanup);