1 // SPDX-License-Identifier: GPL-2.0+
3 * dummy_hcd.c -- Dummy/Loopback USB host and device emulator driver.
5 * Maintainer: Alan Stern <stern@rowland.harvard.edu>
7 * Copyright (C) 2003 David Brownell
8 * Copyright (C) 2003-2005 Alan Stern
13 * This exposes a device side "USB gadget" API, driven by requests to a
14 * Linux-USB host controller driver. USB traffic is simulated; there's
15 * no need for USB hardware. Use this with two other drivers:
17 * - Gadget driver, responding to requests (device);
18 * - Host-side device driver, as already familiar in Linux.
20 * Having this all in one kernel can help some stages of development,
21 * bypassing some hardware (and driver) issues. UML could help too.
23 * Note: The emulation does not include isochronous transfers!
26 #include <linux/module.h>
27 #include <linux/kernel.h>
28 #include <linux/delay.h>
29 #include <linux/ioport.h>
30 #include <linux/slab.h>
31 #include <linux/errno.h>
32 #include <linux/init.h>
33 #include <linux/timer.h>
34 #include <linux/list.h>
35 #include <linux/interrupt.h>
36 #include <linux/platform_device.h>
37 #include <linux/usb.h>
38 #include <linux/usb/gadget.h>
39 #include <linux/usb/hcd.h>
40 #include <linux/scatterlist.h>
42 #include <asm/byteorder.h>
45 #include <asm/unaligned.h>
47 #define DRIVER_DESC "USB Host+Gadget Emulator"
48 #define DRIVER_VERSION "02 May 2005"
50 #define POWER_BUDGET 500 /* in mA; use 8 for low-power port testing */
51 #define POWER_BUDGET_3 900 /* in mA */
53 static const char driver_name[] = "dummy_hcd";
54 static const char driver_desc[] = "USB Host+Gadget Emulator";
56 static const char gadget_name[] = "dummy_udc";
58 MODULE_DESCRIPTION(DRIVER_DESC);
59 MODULE_AUTHOR("David Brownell");
60 MODULE_LICENSE("GPL");
62 struct dummy_hcd_module_parameters {
68 static struct dummy_hcd_module_parameters mod_data = {
69 .is_super_speed = false,
70 .is_high_speed = true,
73 module_param_named(is_super_speed, mod_data.is_super_speed, bool, S_IRUGO);
74 MODULE_PARM_DESC(is_super_speed, "true to simulate SuperSpeed connection");
75 module_param_named(is_high_speed, mod_data.is_high_speed, bool, S_IRUGO);
76 MODULE_PARM_DESC(is_high_speed, "true to simulate HighSpeed connection");
77 module_param_named(num, mod_data.num, uint, S_IRUGO);
78 MODULE_PARM_DESC(num, "number of emulated controllers");
79 /*-------------------------------------------------------------------------*/
81 /* gadget side driver data structres */
83 struct list_head queue;
84 unsigned long last_io; /* jiffies timestamp */
85 struct usb_gadget *gadget;
86 const struct usb_endpoint_descriptor *desc;
90 unsigned already_seen:1;
91 unsigned setup_stage:1;
95 struct dummy_request {
96 struct list_head queue; /* ep's requests */
97 struct usb_request req;
100 static inline struct dummy_ep *usb_ep_to_dummy_ep(struct usb_ep *_ep)
102 return container_of(_ep, struct dummy_ep, ep);
105 static inline struct dummy_request *usb_request_to_dummy_request
106 (struct usb_request *_req)
108 return container_of(_req, struct dummy_request, req);
111 /*-------------------------------------------------------------------------*/
114 * Every device has ep0 for control requests, plus up to 30 more endpoints,
115 * in one of two types:
117 * - Configurable: direction (in/out), type (bulk, iso, etc), and endpoint
118 * number can be changed. Names like "ep-a" are used for this type.
120 * - Fixed Function: in other cases. some characteristics may be mutable;
121 * that'd be hardware-specific. Names like "ep12out-bulk" are used.
123 * Gadget drivers are responsible for not setting up conflicting endpoint
124 * configurations, illegal or unsupported packet lengths, and so on.
127 static const char ep0name[] = "ep0";
129 static const struct {
131 const struct usb_ep_caps caps;
133 #define EP_INFO(_name, _caps) \
139 /* we don't provide isochronous endpoints since we don't support them */
140 #define TYPE_BULK_OR_INT (USB_EP_CAPS_TYPE_BULK | USB_EP_CAPS_TYPE_INT)
142 /* everyone has ep0 */
144 USB_EP_CAPS(USB_EP_CAPS_TYPE_CONTROL, USB_EP_CAPS_DIR_ALL)),
145 /* act like a pxa250: fifteen fixed function endpoints */
146 EP_INFO("ep1in-bulk",
147 USB_EP_CAPS(USB_EP_CAPS_TYPE_BULK, USB_EP_CAPS_DIR_IN)),
148 EP_INFO("ep2out-bulk",
149 USB_EP_CAPS(USB_EP_CAPS_TYPE_BULK, USB_EP_CAPS_DIR_OUT)),
152 USB_EP_CAPS(USB_EP_CAPS_TYPE_ISO, USB_EP_CAPS_DIR_IN)),
153 EP_INFO("ep4out-iso",
154 USB_EP_CAPS(USB_EP_CAPS_TYPE_ISO, USB_EP_CAPS_DIR_OUT)),
157 USB_EP_CAPS(USB_EP_CAPS_TYPE_INT, USB_EP_CAPS_DIR_IN)),
158 EP_INFO("ep6in-bulk",
159 USB_EP_CAPS(USB_EP_CAPS_TYPE_BULK, USB_EP_CAPS_DIR_IN)),
160 EP_INFO("ep7out-bulk",
161 USB_EP_CAPS(USB_EP_CAPS_TYPE_BULK, USB_EP_CAPS_DIR_OUT)),
164 USB_EP_CAPS(USB_EP_CAPS_TYPE_ISO, USB_EP_CAPS_DIR_IN)),
165 EP_INFO("ep9out-iso",
166 USB_EP_CAPS(USB_EP_CAPS_TYPE_ISO, USB_EP_CAPS_DIR_OUT)),
168 EP_INFO("ep10in-int",
169 USB_EP_CAPS(USB_EP_CAPS_TYPE_INT, USB_EP_CAPS_DIR_IN)),
170 EP_INFO("ep11in-bulk",
171 USB_EP_CAPS(USB_EP_CAPS_TYPE_BULK, USB_EP_CAPS_DIR_IN)),
172 EP_INFO("ep12out-bulk",
173 USB_EP_CAPS(USB_EP_CAPS_TYPE_BULK, USB_EP_CAPS_DIR_OUT)),
175 EP_INFO("ep13in-iso",
176 USB_EP_CAPS(USB_EP_CAPS_TYPE_ISO, USB_EP_CAPS_DIR_IN)),
177 EP_INFO("ep14out-iso",
178 USB_EP_CAPS(USB_EP_CAPS_TYPE_ISO, USB_EP_CAPS_DIR_OUT)),
180 EP_INFO("ep15in-int",
181 USB_EP_CAPS(USB_EP_CAPS_TYPE_INT, USB_EP_CAPS_DIR_IN)),
183 /* or like sa1100: two fixed function endpoints */
184 EP_INFO("ep1out-bulk",
185 USB_EP_CAPS(USB_EP_CAPS_TYPE_BULK, USB_EP_CAPS_DIR_OUT)),
186 EP_INFO("ep2in-bulk",
187 USB_EP_CAPS(USB_EP_CAPS_TYPE_BULK, USB_EP_CAPS_DIR_IN)),
189 /* and now some generic EPs so we have enough in multi config */
191 USB_EP_CAPS(TYPE_BULK_OR_INT, USB_EP_CAPS_DIR_OUT)),
193 USB_EP_CAPS(TYPE_BULK_OR_INT, USB_EP_CAPS_DIR_IN)),
195 USB_EP_CAPS(TYPE_BULK_OR_INT, USB_EP_CAPS_DIR_OUT)),
197 USB_EP_CAPS(TYPE_BULK_OR_INT, USB_EP_CAPS_DIR_OUT)),
199 USB_EP_CAPS(TYPE_BULK_OR_INT, USB_EP_CAPS_DIR_IN)),
201 USB_EP_CAPS(TYPE_BULK_OR_INT, USB_EP_CAPS_DIR_OUT)),
203 USB_EP_CAPS(TYPE_BULK_OR_INT, USB_EP_CAPS_DIR_IN)),
205 USB_EP_CAPS(TYPE_BULK_OR_INT, USB_EP_CAPS_DIR_OUT)),
207 USB_EP_CAPS(TYPE_BULK_OR_INT, USB_EP_CAPS_DIR_OUT)),
209 USB_EP_CAPS(TYPE_BULK_OR_INT, USB_EP_CAPS_DIR_IN)),
211 USB_EP_CAPS(TYPE_BULK_OR_INT, USB_EP_CAPS_DIR_OUT)),
213 USB_EP_CAPS(TYPE_BULK_OR_INT, USB_EP_CAPS_DIR_IN)),
215 USB_EP_CAPS(TYPE_BULK_OR_INT, USB_EP_CAPS_DIR_OUT)),
220 #define DUMMY_ENDPOINTS ARRAY_SIZE(ep_info)
222 /*-------------------------------------------------------------------------*/
228 struct list_head urbp_list;
229 struct sg_mapping_iter miter;
234 enum dummy_rh_state {
242 enum dummy_rh_state rh_state;
243 struct timer_list timer;
246 unsigned long re_timeout;
248 struct usb_device *udev;
249 struct list_head urbp_list;
250 struct urbp *next_frame_urbp;
253 u8 num_stream[30 / 2];
256 unsigned old_active:1;
264 * DEVICE/GADGET side support
266 struct dummy_ep ep[DUMMY_ENDPOINTS];
269 struct usb_gadget gadget;
270 struct usb_gadget_driver *driver;
271 struct dummy_request fifo_req;
272 u8 fifo_buf[FIFO_SIZE];
274 unsigned ints_enabled:1;
275 unsigned udc_suspended:1;
281 struct dummy_hcd *hs_hcd;
282 struct dummy_hcd *ss_hcd;
285 static inline struct dummy_hcd *hcd_to_dummy_hcd(struct usb_hcd *hcd)
287 return (struct dummy_hcd *) (hcd->hcd_priv);
290 static inline struct usb_hcd *dummy_hcd_to_hcd(struct dummy_hcd *dum)
292 return container_of((void *) dum, struct usb_hcd, hcd_priv);
295 static inline struct device *dummy_dev(struct dummy_hcd *dum)
297 return dummy_hcd_to_hcd(dum)->self.controller;
300 static inline struct device *udc_dev(struct dummy *dum)
302 return dum->gadget.dev.parent;
305 static inline struct dummy *ep_to_dummy(struct dummy_ep *ep)
307 return container_of(ep->gadget, struct dummy, gadget);
310 static inline struct dummy_hcd *gadget_to_dummy_hcd(struct usb_gadget *gadget)
312 struct dummy *dum = container_of(gadget, struct dummy, gadget);
313 if (dum->gadget.speed == USB_SPEED_SUPER)
319 static inline struct dummy *gadget_dev_to_dummy(struct device *dev)
321 return container_of(dev, struct dummy, gadget.dev);
324 /*-------------------------------------------------------------------------*/
326 /* DEVICE/GADGET SIDE UTILITY ROUTINES */
328 /* called with spinlock held */
329 static void nuke(struct dummy *dum, struct dummy_ep *ep)
331 while (!list_empty(&ep->queue)) {
332 struct dummy_request *req;
334 req = list_entry(ep->queue.next, struct dummy_request, queue);
335 list_del_init(&req->queue);
336 req->req.status = -ESHUTDOWN;
338 spin_unlock(&dum->lock);
339 usb_gadget_giveback_request(&ep->ep, &req->req);
340 spin_lock(&dum->lock);
344 /* caller must hold lock */
345 static void stop_activity(struct dummy *dum)
349 /* prevent any more requests */
352 /* The timer is left running so that outstanding URBs can fail */
354 /* nuke any pending requests first, so driver i/o is quiesced */
355 for (i = 0; i < DUMMY_ENDPOINTS; ++i)
356 nuke(dum, &dum->ep[i]);
358 /* driver now does any non-usb quiescing necessary */
362 * set_link_state_by_speed() - Sets the current state of the link according to
364 * @dum_hcd: pointer to the dummy_hcd structure to update the link state for
366 * This function updates the port_status according to the link state and the
369 static void set_link_state_by_speed(struct dummy_hcd *dum_hcd)
371 struct dummy *dum = dum_hcd->dum;
373 if (dummy_hcd_to_hcd(dum_hcd)->speed == HCD_USB3) {
374 if ((dum_hcd->port_status & USB_SS_PORT_STAT_POWER) == 0) {
375 dum_hcd->port_status = 0;
376 } else if (!dum->pullup || dum->udc_suspended) {
377 /* UDC suspend must cause a disconnect */
378 dum_hcd->port_status &= ~(USB_PORT_STAT_CONNECTION |
379 USB_PORT_STAT_ENABLE);
380 if ((dum_hcd->old_status &
381 USB_PORT_STAT_CONNECTION) != 0)
382 dum_hcd->port_status |=
383 (USB_PORT_STAT_C_CONNECTION << 16);
385 /* device is connected and not suspended */
386 dum_hcd->port_status |= (USB_PORT_STAT_CONNECTION |
387 USB_PORT_STAT_SPEED_5GBPS) ;
388 if ((dum_hcd->old_status &
389 USB_PORT_STAT_CONNECTION) == 0)
390 dum_hcd->port_status |=
391 (USB_PORT_STAT_C_CONNECTION << 16);
392 if ((dum_hcd->port_status & USB_PORT_STAT_ENABLE) &&
393 (dum_hcd->port_status &
394 USB_PORT_STAT_LINK_STATE) == USB_SS_PORT_LS_U0 &&
395 dum_hcd->rh_state != DUMMY_RH_SUSPENDED)
399 if ((dum_hcd->port_status & USB_PORT_STAT_POWER) == 0) {
400 dum_hcd->port_status = 0;
401 } else if (!dum->pullup || dum->udc_suspended) {
402 /* UDC suspend must cause a disconnect */
403 dum_hcd->port_status &= ~(USB_PORT_STAT_CONNECTION |
404 USB_PORT_STAT_ENABLE |
405 USB_PORT_STAT_LOW_SPEED |
406 USB_PORT_STAT_HIGH_SPEED |
407 USB_PORT_STAT_SUSPEND);
408 if ((dum_hcd->old_status &
409 USB_PORT_STAT_CONNECTION) != 0)
410 dum_hcd->port_status |=
411 (USB_PORT_STAT_C_CONNECTION << 16);
413 dum_hcd->port_status |= USB_PORT_STAT_CONNECTION;
414 if ((dum_hcd->old_status &
415 USB_PORT_STAT_CONNECTION) == 0)
416 dum_hcd->port_status |=
417 (USB_PORT_STAT_C_CONNECTION << 16);
418 if ((dum_hcd->port_status & USB_PORT_STAT_ENABLE) == 0)
419 dum_hcd->port_status &= ~USB_PORT_STAT_SUSPEND;
420 else if ((dum_hcd->port_status &
421 USB_PORT_STAT_SUSPEND) == 0 &&
422 dum_hcd->rh_state != DUMMY_RH_SUSPENDED)
428 /* caller must hold lock */
429 static void set_link_state(struct dummy_hcd *dum_hcd)
430 __must_hold(&dum->lock)
432 struct dummy *dum = dum_hcd->dum;
433 unsigned int power_bit;
437 if ((dummy_hcd_to_hcd(dum_hcd)->speed == HCD_USB3 &&
438 dum->gadget.speed != USB_SPEED_SUPER) ||
439 (dummy_hcd_to_hcd(dum_hcd)->speed != HCD_USB3 &&
440 dum->gadget.speed == USB_SPEED_SUPER))
443 set_link_state_by_speed(dum_hcd);
444 power_bit = (dummy_hcd_to_hcd(dum_hcd)->speed == HCD_USB3 ?
445 USB_SS_PORT_STAT_POWER : USB_PORT_STAT_POWER);
447 if ((dum_hcd->port_status & USB_PORT_STAT_ENABLE) == 0 ||
449 dum_hcd->resuming = 0;
451 /* Currently !connected or in reset */
452 if ((dum_hcd->port_status & power_bit) == 0 ||
453 (dum_hcd->port_status & USB_PORT_STAT_RESET) != 0) {
454 unsigned int disconnect = power_bit &
455 dum_hcd->old_status & (~dum_hcd->port_status);
456 unsigned int reset = USB_PORT_STAT_RESET &
457 (~dum_hcd->old_status) & dum_hcd->port_status;
459 /* Report reset and disconnect events to the driver */
460 if (dum->ints_enabled && (disconnect || reset)) {
462 ++dum->callback_usage;
463 spin_unlock(&dum->lock);
465 usb_gadget_udc_reset(&dum->gadget, dum->driver);
467 dum->driver->disconnect(&dum->gadget);
468 spin_lock(&dum->lock);
469 --dum->callback_usage;
471 } else if (dum_hcd->active != dum_hcd->old_active &&
473 ++dum->callback_usage;
474 spin_unlock(&dum->lock);
475 if (dum_hcd->old_active && dum->driver->suspend)
476 dum->driver->suspend(&dum->gadget);
477 else if (!dum_hcd->old_active && dum->driver->resume)
478 dum->driver->resume(&dum->gadget);
479 spin_lock(&dum->lock);
480 --dum->callback_usage;
483 dum_hcd->old_status = dum_hcd->port_status;
484 dum_hcd->old_active = dum_hcd->active;
487 /*-------------------------------------------------------------------------*/
489 /* DEVICE/GADGET SIDE DRIVER
491 * This only tracks gadget state. All the work is done when the host
492 * side tries some (emulated) i/o operation. Real device controller
493 * drivers would do real i/o using dma, fifos, irqs, timers, etc.
496 #define is_enabled(dum) \
497 (dum->port_status & USB_PORT_STAT_ENABLE)
499 static int dummy_enable(struct usb_ep *_ep,
500 const struct usb_endpoint_descriptor *desc)
503 struct dummy_hcd *dum_hcd;
508 ep = usb_ep_to_dummy_ep(_ep);
509 if (!_ep || !desc || ep->desc || _ep->name == ep0name
510 || desc->bDescriptorType != USB_DT_ENDPOINT)
512 dum = ep_to_dummy(ep);
516 dum_hcd = gadget_to_dummy_hcd(&dum->gadget);
517 if (!is_enabled(dum_hcd))
521 * For HS/FS devices only bits 0..10 of the wMaxPacketSize represent the
522 * maximum packet size.
523 * For SS devices the wMaxPacketSize is limited by 1024.
525 max = usb_endpoint_maxp(desc);
527 /* drivers must not request bad settings, since lower levels
528 * (hardware or its drivers) may not check. some endpoints
529 * can't do iso, many have maxpacket limitations, etc.
531 * since this "hardware" driver is here to help debugging, we
532 * have some extra sanity checks. (there could be more though,
533 * especially for "ep9out" style fixed function ones.)
536 switch (usb_endpoint_type(desc)) {
537 case USB_ENDPOINT_XFER_BULK:
538 if (strstr(ep->ep.name, "-iso")
539 || strstr(ep->ep.name, "-int")) {
542 switch (dum->gadget.speed) {
543 case USB_SPEED_SUPER:
552 if (max == 8 || max == 16 || max == 32 || max == 64)
553 /* we'll fake any legal size */
555 /* save a return statement */
561 case USB_ENDPOINT_XFER_INT:
562 if (strstr(ep->ep.name, "-iso")) /* bulk is ok */
564 /* real hardware might not handle all packet sizes */
565 switch (dum->gadget.speed) {
566 case USB_SPEED_SUPER:
570 /* save a return statement */
575 /* save a return statement */
583 case USB_ENDPOINT_XFER_ISOC:
584 if (strstr(ep->ep.name, "-bulk")
585 || strstr(ep->ep.name, "-int"))
587 /* real hardware might not handle all packet sizes */
588 switch (dum->gadget.speed) {
589 case USB_SPEED_SUPER:
593 /* save a return statement */
598 /* save a return statement */
605 /* few chips support control except on ep0 */
609 _ep->maxpacket = max;
610 if (usb_ss_max_streams(_ep->comp_desc)) {
611 if (!usb_endpoint_xfer_bulk(desc)) {
612 dev_err(udc_dev(dum), "Can't enable stream support on "
613 "non-bulk ep %s\n", _ep->name);
620 dev_dbg(udc_dev(dum), "enabled %s (ep%d%s-%s) maxpacket %d stream %s\n",
622 desc->bEndpointAddress & 0x0f,
623 (desc->bEndpointAddress & USB_DIR_IN) ? "in" : "out",
624 usb_ep_type_string(usb_endpoint_type(desc)),
625 max, ep->stream_en ? "enabled" : "disabled");
627 /* at this point real hardware should be NAKing transfers
628 * to that endpoint, until a buffer is queued to it.
630 ep->halted = ep->wedged = 0;
636 static int dummy_disable(struct usb_ep *_ep)
642 ep = usb_ep_to_dummy_ep(_ep);
643 if (!_ep || !ep->desc || _ep->name == ep0name)
645 dum = ep_to_dummy(ep);
647 spin_lock_irqsave(&dum->lock, flags);
651 spin_unlock_irqrestore(&dum->lock, flags);
653 dev_dbg(udc_dev(dum), "disabled %s\n", _ep->name);
657 static struct usb_request *dummy_alloc_request(struct usb_ep *_ep,
660 struct dummy_request *req;
665 req = kzalloc(sizeof(*req), mem_flags);
668 INIT_LIST_HEAD(&req->queue);
672 static void dummy_free_request(struct usb_ep *_ep, struct usb_request *_req)
674 struct dummy_request *req;
681 req = usb_request_to_dummy_request(_req);
682 WARN_ON(!list_empty(&req->queue));
686 static void fifo_complete(struct usb_ep *ep, struct usb_request *req)
690 static int dummy_queue(struct usb_ep *_ep, struct usb_request *_req,
694 struct dummy_request *req;
696 struct dummy_hcd *dum_hcd;
699 req = usb_request_to_dummy_request(_req);
700 if (!_req || !list_empty(&req->queue) || !_req->complete)
703 ep = usb_ep_to_dummy_ep(_ep);
704 if (!_ep || (!ep->desc && _ep->name != ep0name))
707 dum = ep_to_dummy(ep);
708 dum_hcd = gadget_to_dummy_hcd(&dum->gadget);
709 if (!dum->driver || !is_enabled(dum_hcd))
713 dev_dbg(udc_dev(dum), "ep %p queue req %p to %s, len %d buf %p\n",
714 ep, _req, _ep->name, _req->length, _req->buf);
716 _req->status = -EINPROGRESS;
718 spin_lock_irqsave(&dum->lock, flags);
720 /* implement an emulated single-request FIFO */
721 if (ep->desc && (ep->desc->bEndpointAddress & USB_DIR_IN) &&
722 list_empty(&dum->fifo_req.queue) &&
723 list_empty(&ep->queue) &&
724 _req->length <= FIFO_SIZE) {
725 req = &dum->fifo_req;
727 req->req.buf = dum->fifo_buf;
728 memcpy(dum->fifo_buf, _req->buf, _req->length);
729 req->req.context = dum;
730 req->req.complete = fifo_complete;
732 list_add_tail(&req->queue, &ep->queue);
733 spin_unlock(&dum->lock);
734 _req->actual = _req->length;
736 usb_gadget_giveback_request(_ep, _req);
737 spin_lock(&dum->lock);
739 list_add_tail(&req->queue, &ep->queue);
740 spin_unlock_irqrestore(&dum->lock, flags);
742 /* real hardware would likely enable transfers here, in case
743 * it'd been left NAKing.
748 static int dummy_dequeue(struct usb_ep *_ep, struct usb_request *_req)
752 int retval = -EINVAL;
754 struct dummy_request *req = NULL;
758 ep = usb_ep_to_dummy_ep(_ep);
759 dum = ep_to_dummy(ep);
764 local_irq_save(flags);
765 spin_lock(&dum->lock);
766 list_for_each_entry(req, &ep->queue, queue) {
767 if (&req->req == _req) {
768 list_del_init(&req->queue);
769 _req->status = -ECONNRESET;
774 spin_unlock(&dum->lock);
777 dev_dbg(udc_dev(dum),
778 "dequeued req %p from %s, len %d buf %p\n",
779 req, _ep->name, _req->length, _req->buf);
780 usb_gadget_giveback_request(_ep, _req);
782 local_irq_restore(flags);
787 dummy_set_halt_and_wedge(struct usb_ep *_ep, int value, int wedged)
794 ep = usb_ep_to_dummy_ep(_ep);
795 dum = ep_to_dummy(ep);
799 ep->halted = ep->wedged = 0;
800 else if (ep->desc && (ep->desc->bEndpointAddress & USB_DIR_IN) &&
801 !list_empty(&ep->queue))
808 /* FIXME clear emulated data toggle too */
813 dummy_set_halt(struct usb_ep *_ep, int value)
815 return dummy_set_halt_and_wedge(_ep, value, 0);
818 static int dummy_set_wedge(struct usb_ep *_ep)
820 if (!_ep || _ep->name == ep0name)
822 return dummy_set_halt_and_wedge(_ep, 1, 1);
825 static const struct usb_ep_ops dummy_ep_ops = {
826 .enable = dummy_enable,
827 .disable = dummy_disable,
829 .alloc_request = dummy_alloc_request,
830 .free_request = dummy_free_request,
832 .queue = dummy_queue,
833 .dequeue = dummy_dequeue,
835 .set_halt = dummy_set_halt,
836 .set_wedge = dummy_set_wedge,
839 /*-------------------------------------------------------------------------*/
841 /* there are both host and device side versions of this call ... */
842 static int dummy_g_get_frame(struct usb_gadget *_gadget)
844 struct timespec64 ts64;
846 ktime_get_ts64(&ts64);
847 return ts64.tv_nsec / NSEC_PER_MSEC;
850 static int dummy_wakeup(struct usb_gadget *_gadget)
852 struct dummy_hcd *dum_hcd;
854 dum_hcd = gadget_to_dummy_hcd(_gadget);
855 if (!(dum_hcd->dum->devstatus & ((1 << USB_DEVICE_B_HNP_ENABLE)
856 | (1 << USB_DEVICE_REMOTE_WAKEUP))))
858 if ((dum_hcd->port_status & USB_PORT_STAT_CONNECTION) == 0)
860 if ((dum_hcd->port_status & USB_PORT_STAT_SUSPEND) == 0 &&
861 dum_hcd->rh_state != DUMMY_RH_SUSPENDED)
864 /* FIXME: What if the root hub is suspended but the port isn't? */
866 /* hub notices our request, issues downstream resume, etc */
867 dum_hcd->resuming = 1;
868 dum_hcd->re_timeout = jiffies + msecs_to_jiffies(20);
869 mod_timer(&dummy_hcd_to_hcd(dum_hcd)->rh_timer, dum_hcd->re_timeout);
873 static int dummy_set_selfpowered(struct usb_gadget *_gadget, int value)
877 _gadget->is_selfpowered = (value != 0);
878 dum = gadget_to_dummy_hcd(_gadget)->dum;
880 dum->devstatus |= (1 << USB_DEVICE_SELF_POWERED);
882 dum->devstatus &= ~(1 << USB_DEVICE_SELF_POWERED);
886 static void dummy_udc_update_ep0(struct dummy *dum)
888 if (dum->gadget.speed == USB_SPEED_SUPER)
889 dum->ep[0].ep.maxpacket = 9;
891 dum->ep[0].ep.maxpacket = 64;
894 static int dummy_pullup(struct usb_gadget *_gadget, int value)
896 struct dummy_hcd *dum_hcd;
900 dum = gadget_dev_to_dummy(&_gadget->dev);
901 dum_hcd = gadget_to_dummy_hcd(_gadget);
903 spin_lock_irqsave(&dum->lock, flags);
904 dum->pullup = (value != 0);
905 set_link_state(dum_hcd);
906 spin_unlock_irqrestore(&dum->lock, flags);
908 usb_hcd_poll_rh_status(dummy_hcd_to_hcd(dum_hcd));
912 static void dummy_udc_set_speed(struct usb_gadget *_gadget,
913 enum usb_device_speed speed)
917 dum = gadget_dev_to_dummy(&_gadget->dev);
918 dum->gadget.speed = speed;
919 dummy_udc_update_ep0(dum);
922 static int dummy_udc_start(struct usb_gadget *g,
923 struct usb_gadget_driver *driver);
924 static int dummy_udc_stop(struct usb_gadget *g);
926 static const struct usb_gadget_ops dummy_ops = {
927 .get_frame = dummy_g_get_frame,
928 .wakeup = dummy_wakeup,
929 .set_selfpowered = dummy_set_selfpowered,
930 .pullup = dummy_pullup,
931 .udc_start = dummy_udc_start,
932 .udc_stop = dummy_udc_stop,
933 .udc_set_speed = dummy_udc_set_speed,
936 /*-------------------------------------------------------------------------*/
938 /* "function" sysfs attribute */
939 static ssize_t function_show(struct device *dev, struct device_attribute *attr,
942 struct dummy *dum = gadget_dev_to_dummy(dev);
944 if (!dum->driver || !dum->driver->function)
946 return scnprintf(buf, PAGE_SIZE, "%s\n", dum->driver->function);
948 static DEVICE_ATTR_RO(function);
950 /*-------------------------------------------------------------------------*/
953 * Driver registration/unregistration.
955 * This is basically hardware-specific; there's usually only one real USB
956 * device (not host) controller since that's how USB devices are intended
957 * to work. So most implementations of these api calls will rely on the
958 * fact that only one driver will ever bind to the hardware. But curious
959 * hardware can be built with discrete components, so the gadget API doesn't
960 * require that assumption.
962 * For this emulator, it might be convenient to create a usb device
963 * for each driver that registers: just add to a big root hub.
966 static int dummy_udc_start(struct usb_gadget *g,
967 struct usb_gadget_driver *driver)
969 struct dummy_hcd *dum_hcd = gadget_to_dummy_hcd(g);
970 struct dummy *dum = dum_hcd->dum;
973 /* All the speeds we support */
977 case USB_SPEED_SUPER:
980 dev_err(dummy_dev(dum_hcd), "Unsupported driver max speed %d\n",
986 * DEVICE side init ... the layer above hardware, which
987 * can't enumerate without help from the driver we're binding.
990 spin_lock_irq(&dum->lock);
992 dum->driver = driver;
993 dum->ints_enabled = 1;
994 spin_unlock_irq(&dum->lock);
999 static int dummy_udc_stop(struct usb_gadget *g)
1001 struct dummy_hcd *dum_hcd = gadget_to_dummy_hcd(g);
1002 struct dummy *dum = dum_hcd->dum;
1004 spin_lock_irq(&dum->lock);
1005 dum->ints_enabled = 0;
1008 /* emulate synchronize_irq(): wait for callbacks to finish */
1009 while (dum->callback_usage > 0) {
1010 spin_unlock_irq(&dum->lock);
1011 usleep_range(1000, 2000);
1012 spin_lock_irq(&dum->lock);
1016 spin_unlock_irq(&dum->lock);
1023 /* The gadget structure is stored inside the hcd structure and will be
1024 * released along with it. */
1025 static void init_dummy_udc_hw(struct dummy *dum)
1029 INIT_LIST_HEAD(&dum->gadget.ep_list);
1030 for (i = 0; i < DUMMY_ENDPOINTS; i++) {
1031 struct dummy_ep *ep = &dum->ep[i];
1033 if (!ep_info[i].name)
1035 ep->ep.name = ep_info[i].name;
1036 ep->ep.caps = ep_info[i].caps;
1037 ep->ep.ops = &dummy_ep_ops;
1038 list_add_tail(&ep->ep.ep_list, &dum->gadget.ep_list);
1039 ep->halted = ep->wedged = ep->already_seen =
1040 ep->setup_stage = 0;
1041 usb_ep_set_maxpacket_limit(&ep->ep, ~0);
1042 ep->ep.max_streams = 16;
1043 ep->last_io = jiffies;
1044 ep->gadget = &dum->gadget;
1046 INIT_LIST_HEAD(&ep->queue);
1049 dum->gadget.ep0 = &dum->ep[0].ep;
1050 list_del_init(&dum->ep[0].ep.ep_list);
1051 INIT_LIST_HEAD(&dum->fifo_req.queue);
1053 #ifdef CONFIG_USB_OTG
1054 dum->gadget.is_otg = 1;
1058 static int dummy_udc_probe(struct platform_device *pdev)
1063 dum = *((void **)dev_get_platdata(&pdev->dev));
1064 /* Clear usb_gadget region for new registration to udc-core */
1065 memzero_explicit(&dum->gadget, sizeof(struct usb_gadget));
1066 dum->gadget.name = gadget_name;
1067 dum->gadget.ops = &dummy_ops;
1068 if (mod_data.is_super_speed)
1069 dum->gadget.max_speed = USB_SPEED_SUPER;
1070 else if (mod_data.is_high_speed)
1071 dum->gadget.max_speed = USB_SPEED_HIGH;
1073 dum->gadget.max_speed = USB_SPEED_FULL;
1075 dum->gadget.dev.parent = &pdev->dev;
1076 init_dummy_udc_hw(dum);
1078 rc = usb_add_gadget_udc(&pdev->dev, &dum->gadget);
1082 rc = device_create_file(&dum->gadget.dev, &dev_attr_function);
1085 platform_set_drvdata(pdev, dum);
1089 usb_del_gadget_udc(&dum->gadget);
1094 static int dummy_udc_remove(struct platform_device *pdev)
1096 struct dummy *dum = platform_get_drvdata(pdev);
1098 device_remove_file(&dum->gadget.dev, &dev_attr_function);
1099 usb_del_gadget_udc(&dum->gadget);
1103 static void dummy_udc_pm(struct dummy *dum, struct dummy_hcd *dum_hcd,
1106 spin_lock_irq(&dum->lock);
1107 dum->udc_suspended = suspend;
1108 set_link_state(dum_hcd);
1109 spin_unlock_irq(&dum->lock);
1112 static int dummy_udc_suspend(struct platform_device *pdev, pm_message_t state)
1114 struct dummy *dum = platform_get_drvdata(pdev);
1115 struct dummy_hcd *dum_hcd = gadget_to_dummy_hcd(&dum->gadget);
1117 dev_dbg(&pdev->dev, "%s\n", __func__);
1118 dummy_udc_pm(dum, dum_hcd, 1);
1119 usb_hcd_poll_rh_status(dummy_hcd_to_hcd(dum_hcd));
1123 static int dummy_udc_resume(struct platform_device *pdev)
1125 struct dummy *dum = platform_get_drvdata(pdev);
1126 struct dummy_hcd *dum_hcd = gadget_to_dummy_hcd(&dum->gadget);
1128 dev_dbg(&pdev->dev, "%s\n", __func__);
1129 dummy_udc_pm(dum, dum_hcd, 0);
1130 usb_hcd_poll_rh_status(dummy_hcd_to_hcd(dum_hcd));
1134 static struct platform_driver dummy_udc_driver = {
1135 .probe = dummy_udc_probe,
1136 .remove = dummy_udc_remove,
1137 .suspend = dummy_udc_suspend,
1138 .resume = dummy_udc_resume,
1140 .name = gadget_name,
1144 /*-------------------------------------------------------------------------*/
1146 static unsigned int dummy_get_ep_idx(const struct usb_endpoint_descriptor *desc)
1150 index = usb_endpoint_num(desc) << 1;
1151 if (usb_endpoint_dir_in(desc))
1158 * this uses the hcd framework to hook up to host side drivers.
1159 * its root hub will only have one device, otherwise it acts like
1160 * a normal host controller.
1162 * when urbs are queued, they're just stuck on a list that we
1163 * scan in a timer callback. that callback connects writes from
1164 * the host with reads from the device, and so on, based on the
1168 static int dummy_ep_stream_en(struct dummy_hcd *dum_hcd, struct urb *urb)
1170 const struct usb_endpoint_descriptor *desc = &urb->ep->desc;
1173 if (!usb_endpoint_xfer_bulk(desc))
1176 index = dummy_get_ep_idx(desc);
1177 return (1 << index) & dum_hcd->stream_en_ep;
1181 * The max stream number is saved as a nibble so for the 30 possible endpoints
1182 * we only 15 bytes of memory. Therefore we are limited to max 16 streams (0
1183 * means we use only 1 stream). The maximum according to the spec is 16bit so
1184 * if the 16 stream limit is about to go, the array size should be incremented
1185 * to 30 elements of type u16.
1187 static int get_max_streams_for_pipe(struct dummy_hcd *dum_hcd,
1192 max_streams = dum_hcd->num_stream[usb_pipeendpoint(pipe)];
1193 if (usb_pipeout(pipe))
1201 static void set_max_streams_for_pipe(struct dummy_hcd *dum_hcd,
1202 unsigned int pipe, unsigned int streams)
1207 max_streams = dum_hcd->num_stream[usb_pipeendpoint(pipe)];
1208 if (usb_pipeout(pipe)) {
1212 max_streams &= 0xf0;
1214 max_streams |= streams;
1215 dum_hcd->num_stream[usb_pipeendpoint(pipe)] = max_streams;
1218 static int dummy_validate_stream(struct dummy_hcd *dum_hcd, struct urb *urb)
1220 unsigned int max_streams;
1223 enabled = dummy_ep_stream_en(dum_hcd, urb);
1224 if (!urb->stream_id) {
1232 max_streams = get_max_streams_for_pipe(dum_hcd,
1233 usb_pipeendpoint(urb->pipe));
1234 if (urb->stream_id > max_streams) {
1235 dev_err(dummy_dev(dum_hcd), "Stream id %d is out of range.\n",
1243 static int dummy_urb_enqueue(
1244 struct usb_hcd *hcd,
1248 struct dummy_hcd *dum_hcd;
1250 unsigned long flags;
1253 urbp = kmalloc(sizeof *urbp, mem_flags);
1257 urbp->miter_started = 0;
1259 dum_hcd = hcd_to_dummy_hcd(hcd);
1260 spin_lock_irqsave(&dum_hcd->dum->lock, flags);
1262 rc = dummy_validate_stream(dum_hcd, urb);
1268 rc = usb_hcd_link_urb_to_ep(hcd, urb);
1274 if (!dum_hcd->udev) {
1275 dum_hcd->udev = urb->dev;
1276 usb_get_dev(dum_hcd->udev);
1277 } else if (unlikely(dum_hcd->udev != urb->dev))
1278 dev_err(dummy_dev(dum_hcd), "usb_device address has changed!\n");
1280 list_add_tail(&urbp->urbp_list, &dum_hcd->urbp_list);
1282 if (!dum_hcd->next_frame_urbp)
1283 dum_hcd->next_frame_urbp = urbp;
1284 if (usb_pipetype(urb->pipe) == PIPE_CONTROL)
1285 urb->error_count = 1; /* mark as a new urb */
1287 /* kick the scheduler, it'll do the rest */
1288 if (!timer_pending(&dum_hcd->timer))
1289 mod_timer(&dum_hcd->timer, jiffies + 1);
1292 spin_unlock_irqrestore(&dum_hcd->dum->lock, flags);
1296 static int dummy_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status)
1298 struct dummy_hcd *dum_hcd;
1299 unsigned long flags;
1302 /* giveback happens automatically in timer callback,
1303 * so make sure the callback happens */
1304 dum_hcd = hcd_to_dummy_hcd(hcd);
1305 spin_lock_irqsave(&dum_hcd->dum->lock, flags);
1307 rc = usb_hcd_check_unlink_urb(hcd, urb, status);
1308 if (!rc && dum_hcd->rh_state != DUMMY_RH_RUNNING &&
1309 !list_empty(&dum_hcd->urbp_list))
1310 mod_timer(&dum_hcd->timer, jiffies);
1312 spin_unlock_irqrestore(&dum_hcd->dum->lock, flags);
1316 static int dummy_perform_transfer(struct urb *urb, struct dummy_request *req,
1320 struct urbp *urbp = urb->hcpriv;
1322 struct sg_mapping_iter *miter = &urbp->miter;
1327 to_host = usb_urb_dir_in(urb);
1328 rbuf = req->req.buf + req->req.actual;
1330 if (!urb->num_sgs) {
1331 ubuf = urb->transfer_buffer + urb->actual_length;
1333 memcpy(ubuf, rbuf, len);
1335 memcpy(rbuf, ubuf, len);
1339 if (!urbp->miter_started) {
1340 u32 flags = SG_MITER_ATOMIC;
1343 flags |= SG_MITER_TO_SG;
1345 flags |= SG_MITER_FROM_SG;
1347 sg_miter_start(miter, urb->sg, urb->num_sgs, flags);
1348 urbp->miter_started = 1;
1350 next_sg = sg_miter_next(miter);
1351 if (next_sg == false) {
1357 this_sg = min_t(u32, len, miter->length);
1358 miter->consumed = this_sg;
1362 memcpy(ubuf, rbuf, this_sg);
1364 memcpy(rbuf, ubuf, this_sg);
1369 next_sg = sg_miter_next(miter);
1370 if (next_sg == false) {
1378 sg_miter_stop(miter);
1382 /* transfer up to a frame's worth; caller must own lock */
1383 static int transfer(struct dummy_hcd *dum_hcd, struct urb *urb,
1384 struct dummy_ep *ep, int limit, int *status)
1386 struct dummy *dum = dum_hcd->dum;
1387 struct dummy_request *req;
1391 /* if there's no request queued, the device is NAKing; return */
1392 list_for_each_entry(req, &ep->queue, queue) {
1393 unsigned host_len, dev_len, len;
1394 int is_short, to_host;
1397 if (dummy_ep_stream_en(dum_hcd, urb)) {
1398 if ((urb->stream_id != req->req.stream_id))
1402 /* 1..N packets of ep->ep.maxpacket each ... the last one
1403 * may be short (including zero length).
1405 * writer can send a zlp explicitly (length 0) or implicitly
1406 * (length mod maxpacket zero, and 'zero' flag); they always
1409 host_len = urb->transfer_buffer_length - urb->actual_length;
1410 dev_len = req->req.length - req->req.actual;
1411 len = min(host_len, dev_len);
1413 /* FIXME update emulated data toggle too */
1415 to_host = usb_urb_dir_in(urb);
1416 if (unlikely(len == 0))
1419 /* not enough bandwidth left? */
1420 if (limit < ep->ep.maxpacket && limit < len)
1422 len = min_t(unsigned, len, limit);
1426 /* send multiple of maxpacket first, then remainder */
1427 if (len >= ep->ep.maxpacket) {
1429 if (len % ep->ep.maxpacket)
1431 len -= len % ep->ep.maxpacket;
1436 len = dummy_perform_transfer(urb, req, len);
1438 ep->last_io = jiffies;
1440 req->req.status = len;
1444 urb->actual_length += len;
1445 req->req.actual += len;
1449 /* short packets terminate, maybe with overflow/underflow.
1450 * it's only really an error to write too much.
1452 * partially filling a buffer optionally blocks queue advances
1453 * (so completion handlers can clean up the queue) but we don't
1454 * need to emulate such data-in-flight.
1457 if (host_len == dev_len) {
1458 req->req.status = 0;
1460 } else if (to_host) {
1461 req->req.status = 0;
1462 if (dev_len > host_len)
1463 *status = -EOVERFLOW;
1468 if (host_len > dev_len)
1469 req->req.status = -EOVERFLOW;
1471 req->req.status = 0;
1475 * many requests terminate without a short packet.
1476 * send a zlp if demanded by flags.
1479 if (req->req.length == req->req.actual) {
1480 if (req->req.zero && to_host)
1483 req->req.status = 0;
1485 if (urb->transfer_buffer_length == urb->actual_length) {
1486 if (urb->transfer_flags & URB_ZERO_PACKET &&
1494 /* device side completion --> continuable */
1495 if (req->req.status != -EINPROGRESS) {
1496 list_del_init(&req->queue);
1498 spin_unlock(&dum->lock);
1499 usb_gadget_giveback_request(&ep->ep, &req->req);
1500 spin_lock(&dum->lock);
1502 /* requests might have been unlinked... */
1506 /* host side completion --> terminate */
1507 if (*status != -EINPROGRESS)
1510 /* rescan to continue with any other queued i/o */
1517 static int periodic_bytes(struct dummy *dum, struct dummy_ep *ep)
1519 int limit = ep->ep.maxpacket;
1521 if (dum->gadget.speed == USB_SPEED_HIGH) {
1524 /* high bandwidth mode */
1525 tmp = usb_endpoint_maxp_mult(ep->desc);
1526 tmp *= 8 /* applies to entire frame */;
1527 limit += limit * tmp;
1529 if (dum->gadget.speed == USB_SPEED_SUPER) {
1530 switch (usb_endpoint_type(ep->desc)) {
1531 case USB_ENDPOINT_XFER_ISOC:
1532 /* Sec. 4.4.8.2 USB3.0 Spec */
1533 limit = 3 * 16 * 1024 * 8;
1535 case USB_ENDPOINT_XFER_INT:
1536 /* Sec. 4.4.7.2 USB3.0 Spec */
1537 limit = 3 * 1024 * 8;
1539 case USB_ENDPOINT_XFER_BULK:
1547 #define is_active(dum_hcd) ((dum_hcd->port_status & \
1548 (USB_PORT_STAT_CONNECTION | USB_PORT_STAT_ENABLE | \
1549 USB_PORT_STAT_SUSPEND)) \
1550 == (USB_PORT_STAT_CONNECTION | USB_PORT_STAT_ENABLE))
1552 static struct dummy_ep *find_endpoint(struct dummy *dum, u8 address)
1556 if (!is_active((dum->gadget.speed == USB_SPEED_SUPER ?
1557 dum->ss_hcd : dum->hs_hcd)))
1559 if (!dum->ints_enabled)
1561 if ((address & ~USB_DIR_IN) == 0)
1563 for (i = 1; i < DUMMY_ENDPOINTS; i++) {
1564 struct dummy_ep *ep = &dum->ep[i];
1568 if (ep->desc->bEndpointAddress == address)
1576 #define Dev_Request (USB_TYPE_STANDARD | USB_RECIP_DEVICE)
1577 #define Dev_InRequest (Dev_Request | USB_DIR_IN)
1578 #define Intf_Request (USB_TYPE_STANDARD | USB_RECIP_INTERFACE)
1579 #define Intf_InRequest (Intf_Request | USB_DIR_IN)
1580 #define Ep_Request (USB_TYPE_STANDARD | USB_RECIP_ENDPOINT)
1581 #define Ep_InRequest (Ep_Request | USB_DIR_IN)
1585 * handle_control_request() - handles all control transfers
1586 * @dum_hcd: pointer to dummy (the_controller)
1587 * @urb: the urb request to handle
1588 * @setup: pointer to the setup data for a USB device control
1590 * @status: pointer to request handling status
1592 * Return 0 - if the request was handled
1593 * 1 - if the request wasn't handles
1594 * error code on error
1596 static int handle_control_request(struct dummy_hcd *dum_hcd, struct urb *urb,
1597 struct usb_ctrlrequest *setup,
1600 struct dummy_ep *ep2;
1601 struct dummy *dum = dum_hcd->dum;
1606 w_index = le16_to_cpu(setup->wIndex);
1607 w_value = le16_to_cpu(setup->wValue);
1608 switch (setup->bRequest) {
1609 case USB_REQ_SET_ADDRESS:
1610 if (setup->bRequestType != Dev_Request)
1612 dum->address = w_value;
1614 dev_dbg(udc_dev(dum), "set_address = %d\n",
1618 case USB_REQ_SET_FEATURE:
1619 if (setup->bRequestType == Dev_Request) {
1622 case USB_DEVICE_REMOTE_WAKEUP:
1624 case USB_DEVICE_B_HNP_ENABLE:
1625 dum->gadget.b_hnp_enable = 1;
1627 case USB_DEVICE_A_HNP_SUPPORT:
1628 dum->gadget.a_hnp_support = 1;
1630 case USB_DEVICE_A_ALT_HNP_SUPPORT:
1631 dum->gadget.a_alt_hnp_support = 1;
1633 case USB_DEVICE_U1_ENABLE:
1634 if (dummy_hcd_to_hcd(dum_hcd)->speed ==
1636 w_value = USB_DEV_STAT_U1_ENABLED;
1638 ret_val = -EOPNOTSUPP;
1640 case USB_DEVICE_U2_ENABLE:
1641 if (dummy_hcd_to_hcd(dum_hcd)->speed ==
1643 w_value = USB_DEV_STAT_U2_ENABLED;
1645 ret_val = -EOPNOTSUPP;
1647 case USB_DEVICE_LTM_ENABLE:
1648 if (dummy_hcd_to_hcd(dum_hcd)->speed ==
1650 w_value = USB_DEV_STAT_LTM_ENABLED;
1652 ret_val = -EOPNOTSUPP;
1655 ret_val = -EOPNOTSUPP;
1658 dum->devstatus |= (1 << w_value);
1661 } else if (setup->bRequestType == Ep_Request) {
1663 ep2 = find_endpoint(dum, w_index);
1664 if (!ep2 || ep2->ep.name == ep0name) {
1665 ret_val = -EOPNOTSUPP;
1673 case USB_REQ_CLEAR_FEATURE:
1674 if (setup->bRequestType == Dev_Request) {
1677 case USB_DEVICE_REMOTE_WAKEUP:
1678 w_value = USB_DEVICE_REMOTE_WAKEUP;
1680 case USB_DEVICE_U1_ENABLE:
1681 if (dummy_hcd_to_hcd(dum_hcd)->speed ==
1683 w_value = USB_DEV_STAT_U1_ENABLED;
1685 ret_val = -EOPNOTSUPP;
1687 case USB_DEVICE_U2_ENABLE:
1688 if (dummy_hcd_to_hcd(dum_hcd)->speed ==
1690 w_value = USB_DEV_STAT_U2_ENABLED;
1692 ret_val = -EOPNOTSUPP;
1694 case USB_DEVICE_LTM_ENABLE:
1695 if (dummy_hcd_to_hcd(dum_hcd)->speed ==
1697 w_value = USB_DEV_STAT_LTM_ENABLED;
1699 ret_val = -EOPNOTSUPP;
1702 ret_val = -EOPNOTSUPP;
1706 dum->devstatus &= ~(1 << w_value);
1709 } else if (setup->bRequestType == Ep_Request) {
1711 ep2 = find_endpoint(dum, w_index);
1713 ret_val = -EOPNOTSUPP;
1722 case USB_REQ_GET_STATUS:
1723 if (setup->bRequestType == Dev_InRequest
1724 || setup->bRequestType == Intf_InRequest
1725 || setup->bRequestType == Ep_InRequest) {
1728 * device: remote wakeup, selfpowered
1729 * interface: nothing
1732 buf = (char *)urb->transfer_buffer;
1733 if (urb->transfer_buffer_length > 0) {
1734 if (setup->bRequestType == Ep_InRequest) {
1735 ep2 = find_endpoint(dum, w_index);
1737 ret_val = -EOPNOTSUPP;
1740 buf[0] = ep2->halted;
1741 } else if (setup->bRequestType ==
1743 buf[0] = (u8)dum->devstatus;
1747 if (urb->transfer_buffer_length > 1)
1749 urb->actual_length = min_t(u32, 2,
1750 urb->transfer_buffer_length);
1760 * Drive both sides of the transfers; looks like irq handlers to both
1761 * drivers except that the callbacks are invoked from soft interrupt
1764 static void dummy_timer(struct timer_list *t)
1766 struct dummy_hcd *dum_hcd = from_timer(dum_hcd, t, timer);
1767 struct dummy *dum = dum_hcd->dum;
1768 struct urbp *urbp, *tmp;
1769 unsigned long flags;
1773 /* simplistic model for one frame's bandwidth */
1774 /* FIXME: account for transaction and packet overhead */
1775 switch (dum->gadget.speed) {
1777 total = 8/*bytes*/ * 12/*packets*/;
1779 case USB_SPEED_FULL:
1780 total = 64/*bytes*/ * 19/*packets*/;
1782 case USB_SPEED_HIGH:
1783 total = 512/*bytes*/ * 13/*packets*/ * 8/*uframes*/;
1785 case USB_SPEED_SUPER:
1786 /* Bus speed is 500000 bytes/ms, so use a little less */
1789 default: /* Can't happen */
1790 dev_err(dummy_dev(dum_hcd), "bogus device speed\n");
1795 /* FIXME if HZ != 1000 this will probably misbehave ... */
1797 /* look at each urb queued by the host side driver */
1798 spin_lock_irqsave(&dum->lock, flags);
1800 if (!dum_hcd->udev) {
1801 dev_err(dummy_dev(dum_hcd),
1802 "timer fired with no URBs pending?\n");
1803 spin_unlock_irqrestore(&dum->lock, flags);
1806 dum_hcd->next_frame_urbp = NULL;
1808 for (i = 0; i < DUMMY_ENDPOINTS; i++) {
1809 if (!ep_info[i].name)
1811 dum->ep[i].already_seen = 0;
1815 list_for_each_entry_safe(urbp, tmp, &dum_hcd->urbp_list, urbp_list) {
1817 struct dummy_request *req;
1819 struct dummy_ep *ep = NULL;
1820 int status = -EINPROGRESS;
1822 /* stop when we reach URBs queued after the timer interrupt */
1823 if (urbp == dum_hcd->next_frame_urbp)
1829 else if (dum_hcd->rh_state != DUMMY_RH_RUNNING)
1832 /* Used up this frame's bandwidth? */
1836 /* find the gadget's ep for this request (if configured) */
1837 address = usb_pipeendpoint (urb->pipe);
1838 if (usb_urb_dir_in(urb))
1839 address |= USB_DIR_IN;
1840 ep = find_endpoint(dum, address);
1842 /* set_configuration() disagreement */
1843 dev_dbg(dummy_dev(dum_hcd),
1844 "no ep configured for urb %p\n",
1850 if (ep->already_seen)
1852 ep->already_seen = 1;
1853 if (ep == &dum->ep[0] && urb->error_count) {
1854 ep->setup_stage = 1; /* a new urb */
1855 urb->error_count = 0;
1857 if (ep->halted && !ep->setup_stage) {
1858 /* NOTE: must not be iso! */
1859 dev_dbg(dummy_dev(dum_hcd), "ep %s halted, urb %p\n",
1864 /* FIXME make sure both ends agree on maxpacket */
1866 /* handle control requests */
1867 if (ep == &dum->ep[0] && ep->setup_stage) {
1868 struct usb_ctrlrequest setup;
1871 setup = *(struct usb_ctrlrequest *) urb->setup_packet;
1872 /* paranoia, in case of stale queued data */
1873 list_for_each_entry(req, &ep->queue, queue) {
1874 list_del_init(&req->queue);
1875 req->req.status = -EOVERFLOW;
1876 dev_dbg(udc_dev(dum), "stale req = %p\n",
1879 spin_unlock(&dum->lock);
1880 usb_gadget_giveback_request(&ep->ep, &req->req);
1881 spin_lock(&dum->lock);
1882 ep->already_seen = 0;
1886 /* gadget driver never sees set_address or operations
1887 * on standard feature flags. some hardware doesn't
1890 ep->last_io = jiffies;
1891 ep->setup_stage = 0;
1894 value = handle_control_request(dum_hcd, urb, &setup,
1897 /* gadget driver handles all other requests. block
1898 * until setup() returns; no reentrancy issues etc.
1901 ++dum->callback_usage;
1902 spin_unlock(&dum->lock);
1903 value = dum->driver->setup(&dum->gadget,
1905 spin_lock(&dum->lock);
1906 --dum->callback_usage;
1909 /* no delays (max 64KB data stage) */
1911 goto treat_control_like_bulk;
1913 /* error, see below */
1917 if (value != -EOPNOTSUPP)
1918 dev_dbg(udc_dev(dum),
1922 urb->actual_length = 0;
1928 /* non-control requests */
1930 switch (usb_pipetype(urb->pipe)) {
1931 case PIPE_ISOCHRONOUS:
1933 * We don't support isochronous. But if we did,
1934 * here are some of the issues we'd have to face:
1936 * Is it urb->interval since the last xfer?
1937 * Use urb->iso_frame_desc[i].
1938 * Complete whether or not ep has requests queued.
1939 * Report random errors, to debug drivers.
1941 limit = max(limit, periodic_bytes(dum, ep));
1942 status = -EINVAL; /* fail all xfers */
1945 case PIPE_INTERRUPT:
1946 /* FIXME is it urb->interval since the last xfer?
1947 * this almost certainly polls too fast.
1949 limit = max(limit, periodic_bytes(dum, ep));
1953 treat_control_like_bulk:
1954 ep->last_io = jiffies;
1955 total -= transfer(dum_hcd, urb, ep, limit, &status);
1959 /* incomplete transfer? */
1960 if (status == -EINPROGRESS)
1964 list_del(&urbp->urbp_list);
1967 ep->already_seen = ep->setup_stage = 0;
1969 usb_hcd_unlink_urb_from_ep(dummy_hcd_to_hcd(dum_hcd), urb);
1970 spin_unlock(&dum->lock);
1971 usb_hcd_giveback_urb(dummy_hcd_to_hcd(dum_hcd), urb, status);
1972 spin_lock(&dum->lock);
1977 if (list_empty(&dum_hcd->urbp_list)) {
1978 usb_put_dev(dum_hcd->udev);
1979 dum_hcd->udev = NULL;
1980 } else if (dum_hcd->rh_state == DUMMY_RH_RUNNING) {
1981 /* want a 1 msec delay here */
1982 mod_timer(&dum_hcd->timer, jiffies + msecs_to_jiffies(1));
1985 spin_unlock_irqrestore(&dum->lock, flags);
1988 /*-------------------------------------------------------------------------*/
1990 #define PORT_C_MASK \
1991 ((USB_PORT_STAT_C_CONNECTION \
1992 | USB_PORT_STAT_C_ENABLE \
1993 | USB_PORT_STAT_C_SUSPEND \
1994 | USB_PORT_STAT_C_OVERCURRENT \
1995 | USB_PORT_STAT_C_RESET) << 16)
1997 static int dummy_hub_status(struct usb_hcd *hcd, char *buf)
1999 struct dummy_hcd *dum_hcd;
2000 unsigned long flags;
2003 dum_hcd = hcd_to_dummy_hcd(hcd);
2005 spin_lock_irqsave(&dum_hcd->dum->lock, flags);
2006 if (!HCD_HW_ACCESSIBLE(hcd))
2009 if (dum_hcd->resuming && time_after_eq(jiffies, dum_hcd->re_timeout)) {
2010 dum_hcd->port_status |= (USB_PORT_STAT_C_SUSPEND << 16);
2011 dum_hcd->port_status &= ~USB_PORT_STAT_SUSPEND;
2012 set_link_state(dum_hcd);
2015 if ((dum_hcd->port_status & PORT_C_MASK) != 0) {
2017 dev_dbg(dummy_dev(dum_hcd), "port status 0x%08x has changes\n",
2018 dum_hcd->port_status);
2020 if (dum_hcd->rh_state == DUMMY_RH_SUSPENDED)
2021 usb_hcd_resume_root_hub(hcd);
2024 spin_unlock_irqrestore(&dum_hcd->dum->lock, flags);
2028 /* usb 3.0 root hub device descriptor */
2030 struct usb_bos_descriptor bos;
2031 struct usb_ss_cap_descriptor ss_cap;
2032 } __packed usb3_bos_desc = {
2035 .bLength = USB_DT_BOS_SIZE,
2036 .bDescriptorType = USB_DT_BOS,
2037 .wTotalLength = cpu_to_le16(sizeof(usb3_bos_desc)),
2038 .bNumDeviceCaps = 1,
2041 .bLength = USB_DT_USB_SS_CAP_SIZE,
2042 .bDescriptorType = USB_DT_DEVICE_CAPABILITY,
2043 .bDevCapabilityType = USB_SS_CAP_TYPE,
2044 .wSpeedSupported = cpu_to_le16(USB_5GBPS_OPERATION),
2045 .bFunctionalitySupport = ilog2(USB_5GBPS_OPERATION),
2050 ss_hub_descriptor(struct usb_hub_descriptor *desc)
2052 memset(desc, 0, sizeof *desc);
2053 desc->bDescriptorType = USB_DT_SS_HUB;
2054 desc->bDescLength = 12;
2055 desc->wHubCharacteristics = cpu_to_le16(
2056 HUB_CHAR_INDV_PORT_LPSM |
2057 HUB_CHAR_COMMON_OCPM);
2058 desc->bNbrPorts = 1;
2059 desc->u.ss.bHubHdrDecLat = 0x04; /* Worst case: 0.4 micro sec*/
2060 desc->u.ss.DeviceRemovable = 0;
2063 static inline void hub_descriptor(struct usb_hub_descriptor *desc)
2065 memset(desc, 0, sizeof *desc);
2066 desc->bDescriptorType = USB_DT_HUB;
2067 desc->bDescLength = 9;
2068 desc->wHubCharacteristics = cpu_to_le16(
2069 HUB_CHAR_INDV_PORT_LPSM |
2070 HUB_CHAR_COMMON_OCPM);
2071 desc->bNbrPorts = 1;
2072 desc->u.hs.DeviceRemovable[0] = 0;
2073 desc->u.hs.DeviceRemovable[1] = 0xff; /* PortPwrCtrlMask */
2076 static int dummy_hub_control(
2077 struct usb_hcd *hcd,
2084 struct dummy_hcd *dum_hcd;
2086 unsigned long flags;
2088 if (!HCD_HW_ACCESSIBLE(hcd))
2091 dum_hcd = hcd_to_dummy_hcd(hcd);
2093 spin_lock_irqsave(&dum_hcd->dum->lock, flags);
2095 case ClearHubFeature:
2097 case ClearPortFeature:
2099 case USB_PORT_FEAT_SUSPEND:
2100 if (hcd->speed == HCD_USB3) {
2101 dev_dbg(dummy_dev(dum_hcd),
2102 "USB_PORT_FEAT_SUSPEND req not "
2103 "supported for USB 3.0 roothub\n");
2106 if (dum_hcd->port_status & USB_PORT_STAT_SUSPEND) {
2107 /* 20msec resume signaling */
2108 dum_hcd->resuming = 1;
2109 dum_hcd->re_timeout = jiffies +
2110 msecs_to_jiffies(20);
2113 case USB_PORT_FEAT_POWER:
2114 dev_dbg(dummy_dev(dum_hcd), "power-off\n");
2115 if (hcd->speed == HCD_USB3)
2116 dum_hcd->port_status &= ~USB_SS_PORT_STAT_POWER;
2118 dum_hcd->port_status &= ~USB_PORT_STAT_POWER;
2119 set_link_state(dum_hcd);
2122 dum_hcd->port_status &= ~(1 << wValue);
2123 set_link_state(dum_hcd);
2126 case GetHubDescriptor:
2127 if (hcd->speed == HCD_USB3 &&
2128 (wLength < USB_DT_SS_HUB_SIZE ||
2129 wValue != (USB_DT_SS_HUB << 8))) {
2130 dev_dbg(dummy_dev(dum_hcd),
2131 "Wrong hub descriptor type for "
2132 "USB 3.0 roothub.\n");
2135 if (hcd->speed == HCD_USB3)
2136 ss_hub_descriptor((struct usb_hub_descriptor *) buf);
2138 hub_descriptor((struct usb_hub_descriptor *) buf);
2141 case DeviceRequest | USB_REQ_GET_DESCRIPTOR:
2142 if (hcd->speed != HCD_USB3)
2145 if ((wValue >> 8) != USB_DT_BOS)
2148 memcpy(buf, &usb3_bos_desc, sizeof(usb3_bos_desc));
2149 retval = sizeof(usb3_bos_desc);
2153 *(__le32 *) buf = cpu_to_le32(0);
2159 /* whoever resets or resumes must GetPortStatus to
2162 if (dum_hcd->resuming &&
2163 time_after_eq(jiffies, dum_hcd->re_timeout)) {
2164 dum_hcd->port_status |= (USB_PORT_STAT_C_SUSPEND << 16);
2165 dum_hcd->port_status &= ~USB_PORT_STAT_SUSPEND;
2167 if ((dum_hcd->port_status & USB_PORT_STAT_RESET) != 0 &&
2168 time_after_eq(jiffies, dum_hcd->re_timeout)) {
2169 dum_hcd->port_status |= (USB_PORT_STAT_C_RESET << 16);
2170 dum_hcd->port_status &= ~USB_PORT_STAT_RESET;
2171 if (dum_hcd->dum->pullup) {
2172 dum_hcd->port_status |= USB_PORT_STAT_ENABLE;
2174 if (hcd->speed < HCD_USB3) {
2175 switch (dum_hcd->dum->gadget.speed) {
2176 case USB_SPEED_HIGH:
2177 dum_hcd->port_status |=
2178 USB_PORT_STAT_HIGH_SPEED;
2181 dum_hcd->dum->gadget.ep0->
2183 dum_hcd->port_status |=
2184 USB_PORT_STAT_LOW_SPEED;
2192 set_link_state(dum_hcd);
2193 ((__le16 *) buf)[0] = cpu_to_le16(dum_hcd->port_status);
2194 ((__le16 *) buf)[1] = cpu_to_le16(dum_hcd->port_status >> 16);
2199 case SetPortFeature:
2201 case USB_PORT_FEAT_LINK_STATE:
2202 if (hcd->speed != HCD_USB3) {
2203 dev_dbg(dummy_dev(dum_hcd),
2204 "USB_PORT_FEAT_LINK_STATE req not "
2205 "supported for USB 2.0 roothub\n");
2209 * Since this is dummy we don't have an actual link so
2210 * there is nothing to do for the SET_LINK_STATE cmd
2213 case USB_PORT_FEAT_U1_TIMEOUT:
2214 case USB_PORT_FEAT_U2_TIMEOUT:
2215 /* TODO: add suspend/resume support! */
2216 if (hcd->speed != HCD_USB3) {
2217 dev_dbg(dummy_dev(dum_hcd),
2218 "USB_PORT_FEAT_U1/2_TIMEOUT req not "
2219 "supported for USB 2.0 roothub\n");
2223 case USB_PORT_FEAT_SUSPEND:
2224 /* Applicable only for USB2.0 hub */
2225 if (hcd->speed == HCD_USB3) {
2226 dev_dbg(dummy_dev(dum_hcd),
2227 "USB_PORT_FEAT_SUSPEND req not "
2228 "supported for USB 3.0 roothub\n");
2231 if (dum_hcd->active) {
2232 dum_hcd->port_status |= USB_PORT_STAT_SUSPEND;
2234 /* HNP would happen here; for now we
2235 * assume b_bus_req is always true.
2237 set_link_state(dum_hcd);
2238 if (((1 << USB_DEVICE_B_HNP_ENABLE)
2239 & dum_hcd->dum->devstatus) != 0)
2240 dev_dbg(dummy_dev(dum_hcd),
2244 case USB_PORT_FEAT_POWER:
2245 if (hcd->speed == HCD_USB3)
2246 dum_hcd->port_status |= USB_SS_PORT_STAT_POWER;
2248 dum_hcd->port_status |= USB_PORT_STAT_POWER;
2249 set_link_state(dum_hcd);
2251 case USB_PORT_FEAT_BH_PORT_RESET:
2252 /* Applicable only for USB3.0 hub */
2253 if (hcd->speed != HCD_USB3) {
2254 dev_dbg(dummy_dev(dum_hcd),
2255 "USB_PORT_FEAT_BH_PORT_RESET req not "
2256 "supported for USB 2.0 roothub\n");
2260 case USB_PORT_FEAT_RESET:
2261 /* if it's already enabled, disable */
2262 if (hcd->speed == HCD_USB3) {
2263 dum_hcd->port_status = 0;
2264 dum_hcd->port_status =
2265 (USB_SS_PORT_STAT_POWER |
2266 USB_PORT_STAT_CONNECTION |
2267 USB_PORT_STAT_RESET);
2269 dum_hcd->port_status &= ~(USB_PORT_STAT_ENABLE
2270 | USB_PORT_STAT_LOW_SPEED
2271 | USB_PORT_STAT_HIGH_SPEED);
2273 * We want to reset device status. All but the
2274 * Self powered feature
2276 dum_hcd->dum->devstatus &=
2277 (1 << USB_DEVICE_SELF_POWERED);
2279 * FIXME USB3.0: what is the correct reset signaling
2280 * interval? Is it still 50msec as for HS?
2282 dum_hcd->re_timeout = jiffies + msecs_to_jiffies(50);
2285 if (hcd->speed == HCD_USB3) {
2286 if ((dum_hcd->port_status &
2287 USB_SS_PORT_STAT_POWER) != 0) {
2288 dum_hcd->port_status |= (1 << wValue);
2291 if ((dum_hcd->port_status &
2292 USB_PORT_STAT_POWER) != 0) {
2293 dum_hcd->port_status |= (1 << wValue);
2295 set_link_state(dum_hcd);
2298 case GetPortErrorCount:
2299 if (hcd->speed != HCD_USB3) {
2300 dev_dbg(dummy_dev(dum_hcd),
2301 "GetPortErrorCount req not "
2302 "supported for USB 2.0 roothub\n");
2305 /* We'll always return 0 since this is a dummy hub */
2306 *(__le32 *) buf = cpu_to_le32(0);
2309 if (hcd->speed != HCD_USB3) {
2310 dev_dbg(dummy_dev(dum_hcd),
2311 "SetHubDepth req not supported for "
2312 "USB 2.0 roothub\n");
2317 dev_dbg(dummy_dev(dum_hcd),
2318 "hub control req%04x v%04x i%04x l%d\n",
2319 typeReq, wValue, wIndex, wLength);
2321 /* "protocol stall" on error */
2324 spin_unlock_irqrestore(&dum_hcd->dum->lock, flags);
2326 if ((dum_hcd->port_status & PORT_C_MASK) != 0)
2327 usb_hcd_poll_rh_status(hcd);
2331 static int dummy_bus_suspend(struct usb_hcd *hcd)
2333 struct dummy_hcd *dum_hcd = hcd_to_dummy_hcd(hcd);
2335 dev_dbg(&hcd->self.root_hub->dev, "%s\n", __func__);
2337 spin_lock_irq(&dum_hcd->dum->lock);
2338 dum_hcd->rh_state = DUMMY_RH_SUSPENDED;
2339 set_link_state(dum_hcd);
2340 hcd->state = HC_STATE_SUSPENDED;
2341 spin_unlock_irq(&dum_hcd->dum->lock);
2345 static int dummy_bus_resume(struct usb_hcd *hcd)
2347 struct dummy_hcd *dum_hcd = hcd_to_dummy_hcd(hcd);
2350 dev_dbg(&hcd->self.root_hub->dev, "%s\n", __func__);
2352 spin_lock_irq(&dum_hcd->dum->lock);
2353 if (!HCD_HW_ACCESSIBLE(hcd)) {
2356 dum_hcd->rh_state = DUMMY_RH_RUNNING;
2357 set_link_state(dum_hcd);
2358 if (!list_empty(&dum_hcd->urbp_list))
2359 mod_timer(&dum_hcd->timer, jiffies);
2360 hcd->state = HC_STATE_RUNNING;
2362 spin_unlock_irq(&dum_hcd->dum->lock);
2366 /*-------------------------------------------------------------------------*/
2368 static inline ssize_t show_urb(char *buf, size_t size, struct urb *urb)
2370 int ep = usb_pipeendpoint(urb->pipe);
2372 return scnprintf(buf, size,
2373 "urb/%p %s ep%d%s%s len %d/%d\n",
2376 switch (urb->dev->speed) {
2380 case USB_SPEED_FULL:
2383 case USB_SPEED_HIGH:
2386 case USB_SPEED_SUPER:
2393 ep, ep ? (usb_urb_dir_in(urb) ? "in" : "out") : "",
2395 switch (usb_pipetype(urb->pipe)) { \
2396 case PIPE_CONTROL: \
2402 case PIPE_INTERRUPT: \
2409 urb->actual_length, urb->transfer_buffer_length);
2412 static ssize_t urbs_show(struct device *dev, struct device_attribute *attr,
2415 struct usb_hcd *hcd = dev_get_drvdata(dev);
2416 struct dummy_hcd *dum_hcd = hcd_to_dummy_hcd(hcd);
2419 unsigned long flags;
2421 spin_lock_irqsave(&dum_hcd->dum->lock, flags);
2422 list_for_each_entry(urbp, &dum_hcd->urbp_list, urbp_list) {
2425 temp = show_urb(buf, PAGE_SIZE - size, urbp->urb);
2429 spin_unlock_irqrestore(&dum_hcd->dum->lock, flags);
2433 static DEVICE_ATTR_RO(urbs);
2435 static int dummy_start_ss(struct dummy_hcd *dum_hcd)
2437 timer_setup(&dum_hcd->timer, dummy_timer, 0);
2438 dum_hcd->rh_state = DUMMY_RH_RUNNING;
2439 dum_hcd->stream_en_ep = 0;
2440 INIT_LIST_HEAD(&dum_hcd->urbp_list);
2441 dummy_hcd_to_hcd(dum_hcd)->power_budget = POWER_BUDGET_3;
2442 dummy_hcd_to_hcd(dum_hcd)->state = HC_STATE_RUNNING;
2443 dummy_hcd_to_hcd(dum_hcd)->uses_new_polling = 1;
2444 #ifdef CONFIG_USB_OTG
2445 dummy_hcd_to_hcd(dum_hcd)->self.otg_port = 1;
2449 /* FIXME 'urbs' should be a per-device thing, maybe in usbcore */
2450 return device_create_file(dummy_dev(dum_hcd), &dev_attr_urbs);
2453 static int dummy_start(struct usb_hcd *hcd)
2455 struct dummy_hcd *dum_hcd = hcd_to_dummy_hcd(hcd);
2458 * HOST side init ... we emulate a root hub that'll only ever
2459 * talk to one device (the gadget side). Also appears in sysfs,
2460 * just like more familiar pci-based HCDs.
2462 if (!usb_hcd_is_primary_hcd(hcd))
2463 return dummy_start_ss(dum_hcd);
2465 spin_lock_init(&dum_hcd->dum->lock);
2466 timer_setup(&dum_hcd->timer, dummy_timer, 0);
2467 dum_hcd->rh_state = DUMMY_RH_RUNNING;
2469 INIT_LIST_HEAD(&dum_hcd->urbp_list);
2471 hcd->power_budget = POWER_BUDGET;
2472 hcd->state = HC_STATE_RUNNING;
2473 hcd->uses_new_polling = 1;
2475 #ifdef CONFIG_USB_OTG
2476 hcd->self.otg_port = 1;
2479 /* FIXME 'urbs' should be a per-device thing, maybe in usbcore */
2480 return device_create_file(dummy_dev(dum_hcd), &dev_attr_urbs);
2483 static void dummy_stop(struct usb_hcd *hcd)
2485 device_remove_file(dummy_dev(hcd_to_dummy_hcd(hcd)), &dev_attr_urbs);
2486 dev_info(dummy_dev(hcd_to_dummy_hcd(hcd)), "stopped\n");
2489 /*-------------------------------------------------------------------------*/
2491 static int dummy_h_get_frame(struct usb_hcd *hcd)
2493 return dummy_g_get_frame(NULL);
2496 static int dummy_setup(struct usb_hcd *hcd)
2500 dum = *((void **)dev_get_platdata(hcd->self.controller));
2501 hcd->self.sg_tablesize = ~0;
2502 if (usb_hcd_is_primary_hcd(hcd)) {
2503 dum->hs_hcd = hcd_to_dummy_hcd(hcd);
2504 dum->hs_hcd->dum = dum;
2506 * Mark the first roothub as being USB 2.0.
2507 * The USB 3.0 roothub will be registered later by
2510 hcd->speed = HCD_USB2;
2511 hcd->self.root_hub->speed = USB_SPEED_HIGH;
2513 dum->ss_hcd = hcd_to_dummy_hcd(hcd);
2514 dum->ss_hcd->dum = dum;
2515 hcd->speed = HCD_USB3;
2516 hcd->self.root_hub->speed = USB_SPEED_SUPER;
2521 /* Change a group of bulk endpoints to support multiple stream IDs */
2522 static int dummy_alloc_streams(struct usb_hcd *hcd, struct usb_device *udev,
2523 struct usb_host_endpoint **eps, unsigned int num_eps,
2524 unsigned int num_streams, gfp_t mem_flags)
2526 struct dummy_hcd *dum_hcd = hcd_to_dummy_hcd(hcd);
2527 unsigned long flags;
2529 int ret_streams = num_streams;
2536 spin_lock_irqsave(&dum_hcd->dum->lock, flags);
2537 for (i = 0; i < num_eps; i++) {
2538 index = dummy_get_ep_idx(&eps[i]->desc);
2539 if ((1 << index) & dum_hcd->stream_en_ep) {
2540 ret_streams = -EINVAL;
2543 max_stream = usb_ss_max_streams(&eps[i]->ss_ep_comp);
2545 ret_streams = -EINVAL;
2548 if (max_stream < ret_streams) {
2549 dev_dbg(dummy_dev(dum_hcd), "Ep 0x%x only supports %u "
2551 eps[i]->desc.bEndpointAddress,
2553 ret_streams = max_stream;
2557 for (i = 0; i < num_eps; i++) {
2558 index = dummy_get_ep_idx(&eps[i]->desc);
2559 dum_hcd->stream_en_ep |= 1 << index;
2560 set_max_streams_for_pipe(dum_hcd,
2561 usb_endpoint_num(&eps[i]->desc), ret_streams);
2564 spin_unlock_irqrestore(&dum_hcd->dum->lock, flags);
2568 /* Reverts a group of bulk endpoints back to not using stream IDs. */
2569 static int dummy_free_streams(struct usb_hcd *hcd, struct usb_device *udev,
2570 struct usb_host_endpoint **eps, unsigned int num_eps,
2573 struct dummy_hcd *dum_hcd = hcd_to_dummy_hcd(hcd);
2574 unsigned long flags;
2579 spin_lock_irqsave(&dum_hcd->dum->lock, flags);
2580 for (i = 0; i < num_eps; i++) {
2581 index = dummy_get_ep_idx(&eps[i]->desc);
2582 if (!((1 << index) & dum_hcd->stream_en_ep)) {
2588 for (i = 0; i < num_eps; i++) {
2589 index = dummy_get_ep_idx(&eps[i]->desc);
2590 dum_hcd->stream_en_ep &= ~(1 << index);
2591 set_max_streams_for_pipe(dum_hcd,
2592 usb_endpoint_num(&eps[i]->desc), 0);
2596 spin_unlock_irqrestore(&dum_hcd->dum->lock, flags);
2600 static struct hc_driver dummy_hcd = {
2601 .description = (char *) driver_name,
2602 .product_desc = "Dummy host controller",
2603 .hcd_priv_size = sizeof(struct dummy_hcd),
2605 .reset = dummy_setup,
2606 .start = dummy_start,
2609 .urb_enqueue = dummy_urb_enqueue,
2610 .urb_dequeue = dummy_urb_dequeue,
2612 .get_frame_number = dummy_h_get_frame,
2614 .hub_status_data = dummy_hub_status,
2615 .hub_control = dummy_hub_control,
2616 .bus_suspend = dummy_bus_suspend,
2617 .bus_resume = dummy_bus_resume,
2619 .alloc_streams = dummy_alloc_streams,
2620 .free_streams = dummy_free_streams,
2623 static int dummy_hcd_probe(struct platform_device *pdev)
2626 struct usb_hcd *hs_hcd;
2627 struct usb_hcd *ss_hcd;
2630 dev_info(&pdev->dev, "%s, driver " DRIVER_VERSION "\n", driver_desc);
2631 dum = *((void **)dev_get_platdata(&pdev->dev));
2633 if (mod_data.is_super_speed)
2634 dummy_hcd.flags = HCD_USB3 | HCD_SHARED;
2635 else if (mod_data.is_high_speed)
2636 dummy_hcd.flags = HCD_USB2;
2638 dummy_hcd.flags = HCD_USB11;
2639 hs_hcd = usb_create_hcd(&dummy_hcd, &pdev->dev, dev_name(&pdev->dev));
2644 retval = usb_add_hcd(hs_hcd, 0, 0);
2648 if (mod_data.is_super_speed) {
2649 ss_hcd = usb_create_shared_hcd(&dummy_hcd, &pdev->dev,
2650 dev_name(&pdev->dev), hs_hcd);
2653 goto dealloc_usb2_hcd;
2656 retval = usb_add_hcd(ss_hcd, 0, 0);
2663 usb_put_hcd(ss_hcd);
2665 usb_remove_hcd(hs_hcd);
2667 usb_put_hcd(hs_hcd);
2668 dum->hs_hcd = dum->ss_hcd = NULL;
2672 static int dummy_hcd_remove(struct platform_device *pdev)
2676 dum = hcd_to_dummy_hcd(platform_get_drvdata(pdev))->dum;
2679 usb_remove_hcd(dummy_hcd_to_hcd(dum->ss_hcd));
2680 usb_put_hcd(dummy_hcd_to_hcd(dum->ss_hcd));
2683 usb_remove_hcd(dummy_hcd_to_hcd(dum->hs_hcd));
2684 usb_put_hcd(dummy_hcd_to_hcd(dum->hs_hcd));
2692 static int dummy_hcd_suspend(struct platform_device *pdev, pm_message_t state)
2694 struct usb_hcd *hcd;
2695 struct dummy_hcd *dum_hcd;
2698 dev_dbg(&pdev->dev, "%s\n", __func__);
2700 hcd = platform_get_drvdata(pdev);
2701 dum_hcd = hcd_to_dummy_hcd(hcd);
2702 if (dum_hcd->rh_state == DUMMY_RH_RUNNING) {
2703 dev_warn(&pdev->dev, "Root hub isn't suspended!\n");
2706 clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
2710 static int dummy_hcd_resume(struct platform_device *pdev)
2712 struct usb_hcd *hcd;
2714 dev_dbg(&pdev->dev, "%s\n", __func__);
2716 hcd = platform_get_drvdata(pdev);
2717 set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
2718 usb_hcd_poll_rh_status(hcd);
2722 static struct platform_driver dummy_hcd_driver = {
2723 .probe = dummy_hcd_probe,
2724 .remove = dummy_hcd_remove,
2725 .suspend = dummy_hcd_suspend,
2726 .resume = dummy_hcd_resume,
2728 .name = driver_name,
2732 /*-------------------------------------------------------------------------*/
2733 #define MAX_NUM_UDC 32
2734 static struct platform_device *the_udc_pdev[MAX_NUM_UDC];
2735 static struct platform_device *the_hcd_pdev[MAX_NUM_UDC];
2737 static int __init init(void)
2739 int retval = -ENOMEM;
2741 struct dummy *dum[MAX_NUM_UDC] = {};
2746 if (!mod_data.is_high_speed && mod_data.is_super_speed)
2749 if (mod_data.num < 1 || mod_data.num > MAX_NUM_UDC) {
2750 pr_err("Number of emulated UDC must be in range of 1...%d\n",
2755 for (i = 0; i < mod_data.num; i++) {
2756 the_hcd_pdev[i] = platform_device_alloc(driver_name, i);
2757 if (!the_hcd_pdev[i]) {
2760 platform_device_put(the_hcd_pdev[i--]);
2764 for (i = 0; i < mod_data.num; i++) {
2765 the_udc_pdev[i] = platform_device_alloc(gadget_name, i);
2766 if (!the_udc_pdev[i]) {
2769 platform_device_put(the_udc_pdev[i--]);
2773 for (i = 0; i < mod_data.num; i++) {
2774 dum[i] = kzalloc(sizeof(struct dummy), GFP_KERNEL);
2779 retval = platform_device_add_data(the_hcd_pdev[i], &dum[i],
2783 retval = platform_device_add_data(the_udc_pdev[i], &dum[i],
2789 retval = platform_driver_register(&dummy_hcd_driver);
2792 retval = platform_driver_register(&dummy_udc_driver);
2794 goto err_register_udc_driver;
2796 for (i = 0; i < mod_data.num; i++) {
2797 retval = platform_device_add(the_hcd_pdev[i]);
2801 platform_device_del(the_hcd_pdev[i--]);
2805 for (i = 0; i < mod_data.num; i++) {
2806 if (!dum[i]->hs_hcd ||
2807 (!dum[i]->ss_hcd && mod_data.is_super_speed)) {
2809 * The hcd was added successfully but its probe
2810 * function failed for some reason.
2817 for (i = 0; i < mod_data.num; i++) {
2818 retval = platform_device_add(the_udc_pdev[i]);
2822 platform_device_del(the_udc_pdev[i--]);
2827 for (i = 0; i < mod_data.num; i++) {
2828 if (!platform_get_drvdata(the_udc_pdev[i])) {
2830 * The udc was added successfully but its probe
2831 * function failed for some reason.
2840 for (i = 0; i < mod_data.num; i++)
2841 platform_device_del(the_udc_pdev[i]);
2843 for (i = 0; i < mod_data.num; i++)
2844 platform_device_del(the_hcd_pdev[i]);
2846 platform_driver_unregister(&dummy_udc_driver);
2847 err_register_udc_driver:
2848 platform_driver_unregister(&dummy_hcd_driver);
2850 for (i = 0; i < mod_data.num; i++)
2852 for (i = 0; i < mod_data.num; i++)
2853 platform_device_put(the_udc_pdev[i]);
2855 for (i = 0; i < mod_data.num; i++)
2856 platform_device_put(the_hcd_pdev[i]);
2861 static void __exit cleanup(void)
2865 for (i = 0; i < mod_data.num; i++) {
2868 dum = *((void **)dev_get_platdata(&the_udc_pdev[i]->dev));
2870 platform_device_unregister(the_udc_pdev[i]);
2871 platform_device_unregister(the_hcd_pdev[i]);
2874 platform_driver_unregister(&dummy_udc_driver);
2875 platform_driver_unregister(&dummy_hcd_driver);
2877 module_exit(cleanup);