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 struct {
132 const struct usb_ep_caps caps;
134 #define EP_INFO(_name, _caps) \
140 /* everyone has ep0 */
142 USB_EP_CAPS(USB_EP_CAPS_TYPE_CONTROL, USB_EP_CAPS_DIR_ALL)),
143 /* act like a pxa250: fifteen fixed function endpoints */
144 EP_INFO("ep1in-bulk",
145 USB_EP_CAPS(USB_EP_CAPS_TYPE_BULK, USB_EP_CAPS_DIR_IN)),
146 EP_INFO("ep2out-bulk",
147 USB_EP_CAPS(USB_EP_CAPS_TYPE_BULK, USB_EP_CAPS_DIR_OUT)),
149 USB_EP_CAPS(USB_EP_CAPS_TYPE_ISO, USB_EP_CAPS_DIR_IN)),
150 EP_INFO("ep4out-iso",
151 USB_EP_CAPS(USB_EP_CAPS_TYPE_ISO, USB_EP_CAPS_DIR_OUT)),
153 USB_EP_CAPS(USB_EP_CAPS_TYPE_INT, USB_EP_CAPS_DIR_IN)),
154 EP_INFO("ep6in-bulk",
155 USB_EP_CAPS(USB_EP_CAPS_TYPE_BULK, USB_EP_CAPS_DIR_IN)),
156 EP_INFO("ep7out-bulk",
157 USB_EP_CAPS(USB_EP_CAPS_TYPE_BULK, USB_EP_CAPS_DIR_OUT)),
159 USB_EP_CAPS(USB_EP_CAPS_TYPE_ISO, USB_EP_CAPS_DIR_IN)),
160 EP_INFO("ep9out-iso",
161 USB_EP_CAPS(USB_EP_CAPS_TYPE_ISO, USB_EP_CAPS_DIR_OUT)),
162 EP_INFO("ep10in-int",
163 USB_EP_CAPS(USB_EP_CAPS_TYPE_INT, USB_EP_CAPS_DIR_IN)),
164 EP_INFO("ep11in-bulk",
165 USB_EP_CAPS(USB_EP_CAPS_TYPE_BULK, USB_EP_CAPS_DIR_IN)),
166 EP_INFO("ep12out-bulk",
167 USB_EP_CAPS(USB_EP_CAPS_TYPE_BULK, USB_EP_CAPS_DIR_OUT)),
168 EP_INFO("ep13in-iso",
169 USB_EP_CAPS(USB_EP_CAPS_TYPE_ISO, USB_EP_CAPS_DIR_IN)),
170 EP_INFO("ep14out-iso",
171 USB_EP_CAPS(USB_EP_CAPS_TYPE_ISO, USB_EP_CAPS_DIR_OUT)),
172 EP_INFO("ep15in-int",
173 USB_EP_CAPS(USB_EP_CAPS_TYPE_INT, USB_EP_CAPS_DIR_IN)),
174 /* or like sa1100: two fixed function endpoints */
175 EP_INFO("ep1out-bulk",
176 USB_EP_CAPS(USB_EP_CAPS_TYPE_BULK, USB_EP_CAPS_DIR_OUT)),
177 EP_INFO("ep2in-bulk",
178 USB_EP_CAPS(USB_EP_CAPS_TYPE_BULK, USB_EP_CAPS_DIR_IN)),
179 /* and now some generic EPs so we have enough in multi config */
181 USB_EP_CAPS(USB_EP_CAPS_TYPE_ALL, USB_EP_CAPS_DIR_OUT)),
183 USB_EP_CAPS(USB_EP_CAPS_TYPE_ALL, USB_EP_CAPS_DIR_IN)),
185 USB_EP_CAPS(USB_EP_CAPS_TYPE_ALL, USB_EP_CAPS_DIR_OUT)),
187 USB_EP_CAPS(USB_EP_CAPS_TYPE_ALL, USB_EP_CAPS_DIR_OUT)),
189 USB_EP_CAPS(USB_EP_CAPS_TYPE_ALL, USB_EP_CAPS_DIR_IN)),
191 USB_EP_CAPS(USB_EP_CAPS_TYPE_ALL, USB_EP_CAPS_DIR_OUT)),
193 USB_EP_CAPS(USB_EP_CAPS_TYPE_ALL, USB_EP_CAPS_DIR_IN)),
195 USB_EP_CAPS(USB_EP_CAPS_TYPE_ALL, USB_EP_CAPS_DIR_OUT)),
197 USB_EP_CAPS(USB_EP_CAPS_TYPE_ALL, USB_EP_CAPS_DIR_OUT)),
199 USB_EP_CAPS(USB_EP_CAPS_TYPE_ALL, USB_EP_CAPS_DIR_IN)),
201 USB_EP_CAPS(USB_EP_CAPS_TYPE_ALL, USB_EP_CAPS_DIR_OUT)),
203 USB_EP_CAPS(USB_EP_CAPS_TYPE_ALL, USB_EP_CAPS_DIR_IN)),
205 USB_EP_CAPS(USB_EP_CAPS_TYPE_ALL, USB_EP_CAPS_DIR_OUT)),
210 #define DUMMY_ENDPOINTS ARRAY_SIZE(ep_info)
212 /*-------------------------------------------------------------------------*/
218 struct list_head urbp_list;
219 struct sg_mapping_iter miter;
224 enum dummy_rh_state {
232 enum dummy_rh_state rh_state;
233 struct timer_list timer;
236 unsigned long re_timeout;
238 struct usb_device *udev;
239 struct list_head urbp_list;
241 u8 num_stream[30 / 2];
244 unsigned old_active:1;
252 * SLAVE/GADGET side support
254 struct dummy_ep ep[DUMMY_ENDPOINTS];
256 struct usb_gadget gadget;
257 struct usb_gadget_driver *driver;
258 struct dummy_request fifo_req;
259 u8 fifo_buf[FIFO_SIZE];
261 unsigned udc_suspended:1;
265 * MASTER/HOST side support
267 struct dummy_hcd *hs_hcd;
268 struct dummy_hcd *ss_hcd;
271 static inline struct dummy_hcd *hcd_to_dummy_hcd(struct usb_hcd *hcd)
273 return (struct dummy_hcd *) (hcd->hcd_priv);
276 static inline struct usb_hcd *dummy_hcd_to_hcd(struct dummy_hcd *dum)
278 return container_of((void *) dum, struct usb_hcd, hcd_priv);
281 static inline struct device *dummy_dev(struct dummy_hcd *dum)
283 return dummy_hcd_to_hcd(dum)->self.controller;
286 static inline struct device *udc_dev(struct dummy *dum)
288 return dum->gadget.dev.parent;
291 static inline struct dummy *ep_to_dummy(struct dummy_ep *ep)
293 return container_of(ep->gadget, struct dummy, gadget);
296 static inline struct dummy_hcd *gadget_to_dummy_hcd(struct usb_gadget *gadget)
298 struct dummy *dum = container_of(gadget, struct dummy, gadget);
299 if (dum->gadget.speed == USB_SPEED_SUPER)
305 static inline struct dummy *gadget_dev_to_dummy(struct device *dev)
307 return container_of(dev, struct dummy, gadget.dev);
310 /*-------------------------------------------------------------------------*/
312 /* SLAVE/GADGET SIDE UTILITY ROUTINES */
314 /* called with spinlock held */
315 static void nuke(struct dummy *dum, struct dummy_ep *ep)
317 while (!list_empty(&ep->queue)) {
318 struct dummy_request *req;
320 req = list_entry(ep->queue.next, struct dummy_request, queue);
321 list_del_init(&req->queue);
322 req->req.status = -ESHUTDOWN;
324 spin_unlock(&dum->lock);
325 usb_gadget_giveback_request(&ep->ep, &req->req);
326 spin_lock(&dum->lock);
330 /* caller must hold lock */
331 static void stop_activity(struct dummy *dum)
335 /* prevent any more requests */
338 /* The timer is left running so that outstanding URBs can fail */
340 /* nuke any pending requests first, so driver i/o is quiesced */
341 for (i = 0; i < DUMMY_ENDPOINTS; ++i)
342 nuke(dum, &dum->ep[i]);
344 /* driver now does any non-usb quiescing necessary */
348 * set_link_state_by_speed() - Sets the current state of the link according to
350 * @dum_hcd: pointer to the dummy_hcd structure to update the link state for
352 * This function updates the port_status according to the link state and the
355 static void set_link_state_by_speed(struct dummy_hcd *dum_hcd)
357 struct dummy *dum = dum_hcd->dum;
359 if (dummy_hcd_to_hcd(dum_hcd)->speed == HCD_USB3) {
360 if ((dum_hcd->port_status & USB_SS_PORT_STAT_POWER) == 0) {
361 dum_hcd->port_status = 0;
362 } else if (!dum->pullup || dum->udc_suspended) {
363 /* UDC suspend must cause a disconnect */
364 dum_hcd->port_status &= ~(USB_PORT_STAT_CONNECTION |
365 USB_PORT_STAT_ENABLE);
366 if ((dum_hcd->old_status &
367 USB_PORT_STAT_CONNECTION) != 0)
368 dum_hcd->port_status |=
369 (USB_PORT_STAT_C_CONNECTION << 16);
371 /* device is connected and not suspended */
372 dum_hcd->port_status |= (USB_PORT_STAT_CONNECTION |
373 USB_PORT_STAT_SPEED_5GBPS) ;
374 if ((dum_hcd->old_status &
375 USB_PORT_STAT_CONNECTION) == 0)
376 dum_hcd->port_status |=
377 (USB_PORT_STAT_C_CONNECTION << 16);
378 if ((dum_hcd->port_status &
379 USB_PORT_STAT_ENABLE) == 1 &&
380 (dum_hcd->port_status &
381 USB_SS_PORT_LS_U0) == 1 &&
382 dum_hcd->rh_state != DUMMY_RH_SUSPENDED)
386 if ((dum_hcd->port_status & USB_PORT_STAT_POWER) == 0) {
387 dum_hcd->port_status = 0;
388 } else if (!dum->pullup || dum->udc_suspended) {
389 /* UDC suspend must cause a disconnect */
390 dum_hcd->port_status &= ~(USB_PORT_STAT_CONNECTION |
391 USB_PORT_STAT_ENABLE |
392 USB_PORT_STAT_LOW_SPEED |
393 USB_PORT_STAT_HIGH_SPEED |
394 USB_PORT_STAT_SUSPEND);
395 if ((dum_hcd->old_status &
396 USB_PORT_STAT_CONNECTION) != 0)
397 dum_hcd->port_status |=
398 (USB_PORT_STAT_C_CONNECTION << 16);
400 dum_hcd->port_status |= USB_PORT_STAT_CONNECTION;
401 if ((dum_hcd->old_status &
402 USB_PORT_STAT_CONNECTION) == 0)
403 dum_hcd->port_status |=
404 (USB_PORT_STAT_C_CONNECTION << 16);
405 if ((dum_hcd->port_status & USB_PORT_STAT_ENABLE) == 0)
406 dum_hcd->port_status &= ~USB_PORT_STAT_SUSPEND;
407 else if ((dum_hcd->port_status &
408 USB_PORT_STAT_SUSPEND) == 0 &&
409 dum_hcd->rh_state != DUMMY_RH_SUSPENDED)
415 /* caller must hold lock */
416 static void set_link_state(struct dummy_hcd *dum_hcd)
418 struct dummy *dum = dum_hcd->dum;
422 if ((dummy_hcd_to_hcd(dum_hcd)->speed == HCD_USB3 &&
423 dum->gadget.speed != USB_SPEED_SUPER) ||
424 (dummy_hcd_to_hcd(dum_hcd)->speed != HCD_USB3 &&
425 dum->gadget.speed == USB_SPEED_SUPER))
428 set_link_state_by_speed(dum_hcd);
430 if ((dum_hcd->port_status & USB_PORT_STAT_ENABLE) == 0 ||
432 dum_hcd->resuming = 0;
434 /* Currently !connected or in reset */
435 if ((dum_hcd->port_status & USB_PORT_STAT_CONNECTION) == 0 ||
436 (dum_hcd->port_status & USB_PORT_STAT_RESET) != 0) {
437 unsigned disconnect = USB_PORT_STAT_CONNECTION &
438 dum_hcd->old_status & (~dum_hcd->port_status);
439 unsigned reset = USB_PORT_STAT_RESET &
440 (~dum_hcd->old_status) & dum_hcd->port_status;
442 /* Report reset and disconnect events to the driver */
443 if (dum->driver && (disconnect || reset)) {
446 usb_gadget_udc_reset(&dum->gadget, dum->driver);
448 dum->driver->disconnect(&dum->gadget);
450 } else if (dum_hcd->active != dum_hcd->old_active) {
451 if (dum_hcd->old_active && dum->driver->suspend)
452 dum->driver->suspend(&dum->gadget);
453 else if (!dum_hcd->old_active && dum->driver->resume)
454 dum->driver->resume(&dum->gadget);
457 dum_hcd->old_status = dum_hcd->port_status;
458 dum_hcd->old_active = dum_hcd->active;
461 /*-------------------------------------------------------------------------*/
463 /* SLAVE/GADGET SIDE DRIVER
465 * This only tracks gadget state. All the work is done when the host
466 * side tries some (emulated) i/o operation. Real device controller
467 * drivers would do real i/o using dma, fifos, irqs, timers, etc.
470 #define is_enabled(dum) \
471 (dum->port_status & USB_PORT_STAT_ENABLE)
473 static int dummy_enable(struct usb_ep *_ep,
474 const struct usb_endpoint_descriptor *desc)
477 struct dummy_hcd *dum_hcd;
482 ep = usb_ep_to_dummy_ep(_ep);
483 if (!_ep || !desc || ep->desc || _ep->name == ep0name
484 || desc->bDescriptorType != USB_DT_ENDPOINT)
486 dum = ep_to_dummy(ep);
490 dum_hcd = gadget_to_dummy_hcd(&dum->gadget);
491 if (!is_enabled(dum_hcd))
495 * For HS/FS devices only bits 0..10 of the wMaxPacketSize represent the
496 * maximum packet size.
497 * For SS devices the wMaxPacketSize is limited by 1024.
499 max = usb_endpoint_maxp(desc);
501 /* drivers must not request bad settings, since lower levels
502 * (hardware or its drivers) may not check. some endpoints
503 * can't do iso, many have maxpacket limitations, etc.
505 * since this "hardware" driver is here to help debugging, we
506 * have some extra sanity checks. (there could be more though,
507 * especially for "ep9out" style fixed function ones.)
510 switch (usb_endpoint_type(desc)) {
511 case USB_ENDPOINT_XFER_BULK:
512 if (strstr(ep->ep.name, "-iso")
513 || strstr(ep->ep.name, "-int")) {
516 switch (dum->gadget.speed) {
517 case USB_SPEED_SUPER:
526 if (max == 8 || max == 16 || max == 32 || max == 64)
527 /* we'll fake any legal size */
529 /* save a return statement */
534 case USB_ENDPOINT_XFER_INT:
535 if (strstr(ep->ep.name, "-iso")) /* bulk is ok */
537 /* real hardware might not handle all packet sizes */
538 switch (dum->gadget.speed) {
539 case USB_SPEED_SUPER:
543 /* save a return statement */
547 /* save a return statement */
554 case USB_ENDPOINT_XFER_ISOC:
555 if (strstr(ep->ep.name, "-bulk")
556 || strstr(ep->ep.name, "-int"))
558 /* real hardware might not handle all packet sizes */
559 switch (dum->gadget.speed) {
560 case USB_SPEED_SUPER:
564 /* save a return statement */
568 /* save a return statement */
574 /* few chips support control except on ep0 */
578 _ep->maxpacket = max;
579 if (usb_ss_max_streams(_ep->comp_desc)) {
580 if (!usb_endpoint_xfer_bulk(desc)) {
581 dev_err(udc_dev(dum), "Can't enable stream support on "
582 "non-bulk ep %s\n", _ep->name);
589 dev_dbg(udc_dev(dum), "enabled %s (ep%d%s-%s) maxpacket %d stream %s\n",
591 desc->bEndpointAddress & 0x0f,
592 (desc->bEndpointAddress & USB_DIR_IN) ? "in" : "out",
594 switch (usb_endpoint_type(desc)) {
595 case USB_ENDPOINT_XFER_BULK:
598 case USB_ENDPOINT_XFER_ISOC:
601 case USB_ENDPOINT_XFER_INT:
608 max, ep->stream_en ? "enabled" : "disabled");
610 /* at this point real hardware should be NAKing transfers
611 * to that endpoint, until a buffer is queued to it.
613 ep->halted = ep->wedged = 0;
619 static int dummy_disable(struct usb_ep *_ep)
625 ep = usb_ep_to_dummy_ep(_ep);
626 if (!_ep || !ep->desc || _ep->name == ep0name)
628 dum = ep_to_dummy(ep);
630 spin_lock_irqsave(&dum->lock, flags);
634 spin_unlock_irqrestore(&dum->lock, flags);
636 dev_dbg(udc_dev(dum), "disabled %s\n", _ep->name);
640 static struct usb_request *dummy_alloc_request(struct usb_ep *_ep,
643 struct dummy_request *req;
648 req = kzalloc(sizeof(*req), mem_flags);
651 INIT_LIST_HEAD(&req->queue);
655 static void dummy_free_request(struct usb_ep *_ep, struct usb_request *_req)
657 struct dummy_request *req;
664 req = usb_request_to_dummy_request(_req);
665 WARN_ON(!list_empty(&req->queue));
669 static void fifo_complete(struct usb_ep *ep, struct usb_request *req)
673 static int dummy_queue(struct usb_ep *_ep, struct usb_request *_req,
677 struct dummy_request *req;
679 struct dummy_hcd *dum_hcd;
682 req = usb_request_to_dummy_request(_req);
683 if (!_req || !list_empty(&req->queue) || !_req->complete)
686 ep = usb_ep_to_dummy_ep(_ep);
687 if (!_ep || (!ep->desc && _ep->name != ep0name))
690 dum = ep_to_dummy(ep);
691 dum_hcd = gadget_to_dummy_hcd(&dum->gadget);
692 if (!dum->driver || !is_enabled(dum_hcd))
696 dev_dbg(udc_dev(dum), "ep %p queue req %p to %s, len %d buf %p\n",
697 ep, _req, _ep->name, _req->length, _req->buf);
699 _req->status = -EINPROGRESS;
701 spin_lock_irqsave(&dum->lock, flags);
703 /* implement an emulated single-request FIFO */
704 if (ep->desc && (ep->desc->bEndpointAddress & USB_DIR_IN) &&
705 list_empty(&dum->fifo_req.queue) &&
706 list_empty(&ep->queue) &&
707 _req->length <= FIFO_SIZE) {
708 req = &dum->fifo_req;
710 req->req.buf = dum->fifo_buf;
711 memcpy(dum->fifo_buf, _req->buf, _req->length);
712 req->req.context = dum;
713 req->req.complete = fifo_complete;
715 list_add_tail(&req->queue, &ep->queue);
716 spin_unlock(&dum->lock);
717 _req->actual = _req->length;
719 usb_gadget_giveback_request(_ep, _req);
720 spin_lock(&dum->lock);
722 list_add_tail(&req->queue, &ep->queue);
723 spin_unlock_irqrestore(&dum->lock, flags);
725 /* real hardware would likely enable transfers here, in case
726 * it'd been left NAKing.
731 static int dummy_dequeue(struct usb_ep *_ep, struct usb_request *_req)
735 int retval = -EINVAL;
737 struct dummy_request *req = NULL;
741 ep = usb_ep_to_dummy_ep(_ep);
742 dum = ep_to_dummy(ep);
747 local_irq_save(flags);
748 spin_lock(&dum->lock);
749 list_for_each_entry(req, &ep->queue, queue) {
750 if (&req->req == _req) {
751 list_del_init(&req->queue);
752 _req->status = -ECONNRESET;
757 spin_unlock(&dum->lock);
760 dev_dbg(udc_dev(dum),
761 "dequeued req %p from %s, len %d buf %p\n",
762 req, _ep->name, _req->length, _req->buf);
763 usb_gadget_giveback_request(_ep, _req);
765 local_irq_restore(flags);
770 dummy_set_halt_and_wedge(struct usb_ep *_ep, int value, int wedged)
777 ep = usb_ep_to_dummy_ep(_ep);
778 dum = ep_to_dummy(ep);
782 ep->halted = ep->wedged = 0;
783 else if (ep->desc && (ep->desc->bEndpointAddress & USB_DIR_IN) &&
784 !list_empty(&ep->queue))
791 /* FIXME clear emulated data toggle too */
796 dummy_set_halt(struct usb_ep *_ep, int value)
798 return dummy_set_halt_and_wedge(_ep, value, 0);
801 static int dummy_set_wedge(struct usb_ep *_ep)
803 if (!_ep || _ep->name == ep0name)
805 return dummy_set_halt_and_wedge(_ep, 1, 1);
808 static const struct usb_ep_ops dummy_ep_ops = {
809 .enable = dummy_enable,
810 .disable = dummy_disable,
812 .alloc_request = dummy_alloc_request,
813 .free_request = dummy_free_request,
815 .queue = dummy_queue,
816 .dequeue = dummy_dequeue,
818 .set_halt = dummy_set_halt,
819 .set_wedge = dummy_set_wedge,
822 /*-------------------------------------------------------------------------*/
824 /* there are both host and device side versions of this call ... */
825 static int dummy_g_get_frame(struct usb_gadget *_gadget)
827 struct timespec64 ts64;
829 ktime_get_ts64(&ts64);
830 return ts64.tv_nsec / NSEC_PER_MSEC;
833 static int dummy_wakeup(struct usb_gadget *_gadget)
835 struct dummy_hcd *dum_hcd;
837 dum_hcd = gadget_to_dummy_hcd(_gadget);
838 if (!(dum_hcd->dum->devstatus & ((1 << USB_DEVICE_B_HNP_ENABLE)
839 | (1 << USB_DEVICE_REMOTE_WAKEUP))))
841 if ((dum_hcd->port_status & USB_PORT_STAT_CONNECTION) == 0)
843 if ((dum_hcd->port_status & USB_PORT_STAT_SUSPEND) == 0 &&
844 dum_hcd->rh_state != DUMMY_RH_SUSPENDED)
847 /* FIXME: What if the root hub is suspended but the port isn't? */
849 /* hub notices our request, issues downstream resume, etc */
850 dum_hcd->resuming = 1;
851 dum_hcd->re_timeout = jiffies + msecs_to_jiffies(20);
852 mod_timer(&dummy_hcd_to_hcd(dum_hcd)->rh_timer, dum_hcd->re_timeout);
856 static int dummy_set_selfpowered(struct usb_gadget *_gadget, int value)
860 _gadget->is_selfpowered = (value != 0);
861 dum = gadget_to_dummy_hcd(_gadget)->dum;
863 dum->devstatus |= (1 << USB_DEVICE_SELF_POWERED);
865 dum->devstatus &= ~(1 << USB_DEVICE_SELF_POWERED);
869 static void dummy_udc_update_ep0(struct dummy *dum)
871 if (dum->gadget.speed == USB_SPEED_SUPER)
872 dum->ep[0].ep.maxpacket = 9;
874 dum->ep[0].ep.maxpacket = 64;
877 static int dummy_pullup(struct usb_gadget *_gadget, int value)
879 struct dummy_hcd *dum_hcd;
883 dum = gadget_dev_to_dummy(&_gadget->dev);
884 dum_hcd = gadget_to_dummy_hcd(_gadget);
886 spin_lock_irqsave(&dum->lock, flags);
887 dum->pullup = (value != 0);
888 set_link_state(dum_hcd);
889 spin_unlock_irqrestore(&dum->lock, flags);
891 usb_hcd_poll_rh_status(dummy_hcd_to_hcd(dum_hcd));
895 static void dummy_udc_set_speed(struct usb_gadget *_gadget,
896 enum usb_device_speed speed)
900 dum = gadget_dev_to_dummy(&_gadget->dev);
902 if (mod_data.is_super_speed)
903 dum->gadget.speed = min_t(u8, USB_SPEED_SUPER, speed);
904 else if (mod_data.is_high_speed)
905 dum->gadget.speed = min_t(u8, USB_SPEED_HIGH, speed);
907 dum->gadget.speed = USB_SPEED_FULL;
909 dummy_udc_update_ep0(dum);
911 if (dum->gadget.speed < speed)
912 dev_dbg(udc_dev(dum), "This device can perform faster"
913 " if you connect it to a %s port...\n",
914 usb_speed_string(speed));
917 static int dummy_udc_start(struct usb_gadget *g,
918 struct usb_gadget_driver *driver);
919 static int dummy_udc_stop(struct usb_gadget *g);
921 static const struct usb_gadget_ops dummy_ops = {
922 .get_frame = dummy_g_get_frame,
923 .wakeup = dummy_wakeup,
924 .set_selfpowered = dummy_set_selfpowered,
925 .pullup = dummy_pullup,
926 .udc_start = dummy_udc_start,
927 .udc_stop = dummy_udc_stop,
928 .udc_set_speed = dummy_udc_set_speed,
931 /*-------------------------------------------------------------------------*/
933 /* "function" sysfs attribute */
934 static ssize_t function_show(struct device *dev, struct device_attribute *attr,
937 struct dummy *dum = gadget_dev_to_dummy(dev);
939 if (!dum->driver || !dum->driver->function)
941 return scnprintf(buf, PAGE_SIZE, "%s\n", dum->driver->function);
943 static DEVICE_ATTR_RO(function);
945 /*-------------------------------------------------------------------------*/
948 * Driver registration/unregistration.
950 * This is basically hardware-specific; there's usually only one real USB
951 * device (not host) controller since that's how USB devices are intended
952 * to work. So most implementations of these api calls will rely on the
953 * fact that only one driver will ever bind to the hardware. But curious
954 * hardware can be built with discrete components, so the gadget API doesn't
955 * require that assumption.
957 * For this emulator, it might be convenient to create a usb slave device
958 * for each driver that registers: just add to a big root hub.
961 static int dummy_udc_start(struct usb_gadget *g,
962 struct usb_gadget_driver *driver)
964 struct dummy_hcd *dum_hcd = gadget_to_dummy_hcd(g);
965 struct dummy *dum = dum_hcd->dum;
967 if (driver->max_speed == USB_SPEED_UNKNOWN)
971 * SLAVE side init ... the layer above hardware, which
972 * can't enumerate without help from the driver we're binding.
976 dum->driver = driver;
981 static int dummy_udc_stop(struct usb_gadget *g)
983 struct dummy_hcd *dum_hcd = gadget_to_dummy_hcd(g);
984 struct dummy *dum = dum_hcd->dum;
986 spin_lock_irq(&dum->lock);
988 spin_unlock_irq(&dum->lock);
995 /* The gadget structure is stored inside the hcd structure and will be
996 * released along with it. */
997 static void init_dummy_udc_hw(struct dummy *dum)
1001 INIT_LIST_HEAD(&dum->gadget.ep_list);
1002 for (i = 0; i < DUMMY_ENDPOINTS; i++) {
1003 struct dummy_ep *ep = &dum->ep[i];
1005 if (!ep_info[i].name)
1007 ep->ep.name = ep_info[i].name;
1008 ep->ep.caps = ep_info[i].caps;
1009 ep->ep.ops = &dummy_ep_ops;
1010 list_add_tail(&ep->ep.ep_list, &dum->gadget.ep_list);
1011 ep->halted = ep->wedged = ep->already_seen =
1012 ep->setup_stage = 0;
1013 usb_ep_set_maxpacket_limit(&ep->ep, ~0);
1014 ep->ep.max_streams = 16;
1015 ep->last_io = jiffies;
1016 ep->gadget = &dum->gadget;
1018 INIT_LIST_HEAD(&ep->queue);
1021 dum->gadget.ep0 = &dum->ep[0].ep;
1022 list_del_init(&dum->ep[0].ep.ep_list);
1023 INIT_LIST_HEAD(&dum->fifo_req.queue);
1025 #ifdef CONFIG_USB_OTG
1026 dum->gadget.is_otg = 1;
1030 static int dummy_udc_probe(struct platform_device *pdev)
1035 dum = *((void **)dev_get_platdata(&pdev->dev));
1036 /* Clear usb_gadget region for new registration to udc-core */
1037 memzero_explicit(&dum->gadget, sizeof(struct usb_gadget));
1038 dum->gadget.name = gadget_name;
1039 dum->gadget.ops = &dummy_ops;
1040 dum->gadget.max_speed = USB_SPEED_SUPER;
1042 dum->gadget.dev.parent = &pdev->dev;
1043 init_dummy_udc_hw(dum);
1045 rc = usb_add_gadget_udc(&pdev->dev, &dum->gadget);
1049 rc = device_create_file(&dum->gadget.dev, &dev_attr_function);
1052 platform_set_drvdata(pdev, dum);
1056 usb_del_gadget_udc(&dum->gadget);
1061 static int dummy_udc_remove(struct platform_device *pdev)
1063 struct dummy *dum = platform_get_drvdata(pdev);
1065 device_remove_file(&dum->gadget.dev, &dev_attr_function);
1066 usb_del_gadget_udc(&dum->gadget);
1070 static void dummy_udc_pm(struct dummy *dum, struct dummy_hcd *dum_hcd,
1073 spin_lock_irq(&dum->lock);
1074 dum->udc_suspended = suspend;
1075 set_link_state(dum_hcd);
1076 spin_unlock_irq(&dum->lock);
1079 static int dummy_udc_suspend(struct platform_device *pdev, pm_message_t state)
1081 struct dummy *dum = platform_get_drvdata(pdev);
1082 struct dummy_hcd *dum_hcd = gadget_to_dummy_hcd(&dum->gadget);
1084 dev_dbg(&pdev->dev, "%s\n", __func__);
1085 dummy_udc_pm(dum, dum_hcd, 1);
1086 usb_hcd_poll_rh_status(dummy_hcd_to_hcd(dum_hcd));
1090 static int dummy_udc_resume(struct platform_device *pdev)
1092 struct dummy *dum = platform_get_drvdata(pdev);
1093 struct dummy_hcd *dum_hcd = gadget_to_dummy_hcd(&dum->gadget);
1095 dev_dbg(&pdev->dev, "%s\n", __func__);
1096 dummy_udc_pm(dum, dum_hcd, 0);
1097 usb_hcd_poll_rh_status(dummy_hcd_to_hcd(dum_hcd));
1101 static struct platform_driver dummy_udc_driver = {
1102 .probe = dummy_udc_probe,
1103 .remove = dummy_udc_remove,
1104 .suspend = dummy_udc_suspend,
1105 .resume = dummy_udc_resume,
1107 .name = (char *) gadget_name,
1111 /*-------------------------------------------------------------------------*/
1113 static unsigned int dummy_get_ep_idx(const struct usb_endpoint_descriptor *desc)
1117 index = usb_endpoint_num(desc) << 1;
1118 if (usb_endpoint_dir_in(desc))
1123 /* MASTER/HOST SIDE DRIVER
1125 * this uses the hcd framework to hook up to host side drivers.
1126 * its root hub will only have one device, otherwise it acts like
1127 * a normal host controller.
1129 * when urbs are queued, they're just stuck on a list that we
1130 * scan in a timer callback. that callback connects writes from
1131 * the host with reads from the device, and so on, based on the
1135 static int dummy_ep_stream_en(struct dummy_hcd *dum_hcd, struct urb *urb)
1137 const struct usb_endpoint_descriptor *desc = &urb->ep->desc;
1140 if (!usb_endpoint_xfer_bulk(desc))
1143 index = dummy_get_ep_idx(desc);
1144 return (1 << index) & dum_hcd->stream_en_ep;
1148 * The max stream number is saved as a nibble so for the 30 possible endpoints
1149 * we only 15 bytes of memory. Therefore we are limited to max 16 streams (0
1150 * means we use only 1 stream). The maximum according to the spec is 16bit so
1151 * if the 16 stream limit is about to go, the array size should be incremented
1152 * to 30 elements of type u16.
1154 static int get_max_streams_for_pipe(struct dummy_hcd *dum_hcd,
1159 max_streams = dum_hcd->num_stream[usb_pipeendpoint(pipe)];
1160 if (usb_pipeout(pipe))
1168 static void set_max_streams_for_pipe(struct dummy_hcd *dum_hcd,
1169 unsigned int pipe, unsigned int streams)
1174 max_streams = dum_hcd->num_stream[usb_pipeendpoint(pipe)];
1175 if (usb_pipeout(pipe)) {
1179 max_streams &= 0xf0;
1181 max_streams |= streams;
1182 dum_hcd->num_stream[usb_pipeendpoint(pipe)] = max_streams;
1185 static int dummy_validate_stream(struct dummy_hcd *dum_hcd, struct urb *urb)
1187 unsigned int max_streams;
1190 enabled = dummy_ep_stream_en(dum_hcd, urb);
1191 if (!urb->stream_id) {
1199 max_streams = get_max_streams_for_pipe(dum_hcd,
1200 usb_pipeendpoint(urb->pipe));
1201 if (urb->stream_id > max_streams) {
1202 dev_err(dummy_dev(dum_hcd), "Stream id %d is out of range.\n",
1210 static int dummy_urb_enqueue(
1211 struct usb_hcd *hcd,
1215 struct dummy_hcd *dum_hcd;
1217 unsigned long flags;
1220 urbp = kmalloc(sizeof *urbp, mem_flags);
1224 urbp->miter_started = 0;
1226 dum_hcd = hcd_to_dummy_hcd(hcd);
1227 spin_lock_irqsave(&dum_hcd->dum->lock, flags);
1229 rc = dummy_validate_stream(dum_hcd, urb);
1235 rc = usb_hcd_link_urb_to_ep(hcd, urb);
1241 if (!dum_hcd->udev) {
1242 dum_hcd->udev = urb->dev;
1243 usb_get_dev(dum_hcd->udev);
1244 } else if (unlikely(dum_hcd->udev != urb->dev))
1245 dev_err(dummy_dev(dum_hcd), "usb_device address has changed!\n");
1247 list_add_tail(&urbp->urbp_list, &dum_hcd->urbp_list);
1249 if (usb_pipetype(urb->pipe) == PIPE_CONTROL)
1250 urb->error_count = 1; /* mark as a new urb */
1252 /* kick the scheduler, it'll do the rest */
1253 if (!timer_pending(&dum_hcd->timer))
1254 mod_timer(&dum_hcd->timer, jiffies + 1);
1257 spin_unlock_irqrestore(&dum_hcd->dum->lock, flags);
1261 static int dummy_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status)
1263 struct dummy_hcd *dum_hcd;
1264 unsigned long flags;
1267 /* giveback happens automatically in timer callback,
1268 * so make sure the callback happens */
1269 dum_hcd = hcd_to_dummy_hcd(hcd);
1270 spin_lock_irqsave(&dum_hcd->dum->lock, flags);
1272 rc = usb_hcd_check_unlink_urb(hcd, urb, status);
1273 if (!rc && dum_hcd->rh_state != DUMMY_RH_RUNNING &&
1274 !list_empty(&dum_hcd->urbp_list))
1275 mod_timer(&dum_hcd->timer, jiffies);
1277 spin_unlock_irqrestore(&dum_hcd->dum->lock, flags);
1281 static int dummy_perform_transfer(struct urb *urb, struct dummy_request *req,
1285 struct urbp *urbp = urb->hcpriv;
1287 struct sg_mapping_iter *miter = &urbp->miter;
1292 to_host = usb_pipein(urb->pipe);
1293 rbuf = req->req.buf + req->req.actual;
1295 if (!urb->num_sgs) {
1296 ubuf = urb->transfer_buffer + urb->actual_length;
1298 memcpy(ubuf, rbuf, len);
1300 memcpy(rbuf, ubuf, len);
1304 if (!urbp->miter_started) {
1305 u32 flags = SG_MITER_ATOMIC;
1308 flags |= SG_MITER_TO_SG;
1310 flags |= SG_MITER_FROM_SG;
1312 sg_miter_start(miter, urb->sg, urb->num_sgs, flags);
1313 urbp->miter_started = 1;
1315 next_sg = sg_miter_next(miter);
1316 if (next_sg == false) {
1322 this_sg = min_t(u32, len, miter->length);
1323 miter->consumed = this_sg;
1327 memcpy(ubuf, rbuf, this_sg);
1329 memcpy(rbuf, ubuf, this_sg);
1334 next_sg = sg_miter_next(miter);
1335 if (next_sg == false) {
1343 sg_miter_stop(miter);
1347 /* transfer up to a frame's worth; caller must own lock */
1348 static int transfer(struct dummy_hcd *dum_hcd, struct urb *urb,
1349 struct dummy_ep *ep, int limit, int *status)
1351 struct dummy *dum = dum_hcd->dum;
1352 struct dummy_request *req;
1356 /* if there's no request queued, the device is NAKing; return */
1357 list_for_each_entry(req, &ep->queue, queue) {
1358 unsigned host_len, dev_len, len;
1359 int is_short, to_host;
1362 if (dummy_ep_stream_en(dum_hcd, urb)) {
1363 if ((urb->stream_id != req->req.stream_id))
1367 /* 1..N packets of ep->ep.maxpacket each ... the last one
1368 * may be short (including zero length).
1370 * writer can send a zlp explicitly (length 0) or implicitly
1371 * (length mod maxpacket zero, and 'zero' flag); they always
1374 host_len = urb->transfer_buffer_length - urb->actual_length;
1375 dev_len = req->req.length - req->req.actual;
1376 len = min(host_len, dev_len);
1378 /* FIXME update emulated data toggle too */
1380 to_host = usb_pipein(urb->pipe);
1381 if (unlikely(len == 0))
1384 /* not enough bandwidth left? */
1385 if (limit < ep->ep.maxpacket && limit < len)
1387 len = min_t(unsigned, len, limit);
1391 /* send multiple of maxpacket first, then remainder */
1392 if (len >= ep->ep.maxpacket) {
1394 if (len % ep->ep.maxpacket)
1396 len -= len % ep->ep.maxpacket;
1401 len = dummy_perform_transfer(urb, req, len);
1403 ep->last_io = jiffies;
1405 req->req.status = len;
1409 urb->actual_length += len;
1410 req->req.actual += len;
1414 /* short packets terminate, maybe with overflow/underflow.
1415 * it's only really an error to write too much.
1417 * partially filling a buffer optionally blocks queue advances
1418 * (so completion handlers can clean up the queue) but we don't
1419 * need to emulate such data-in-flight.
1422 if (host_len == dev_len) {
1423 req->req.status = 0;
1425 } else if (to_host) {
1426 req->req.status = 0;
1427 if (dev_len > host_len)
1428 *status = -EOVERFLOW;
1433 if (host_len > dev_len)
1434 req->req.status = -EOVERFLOW;
1436 req->req.status = 0;
1440 * many requests terminate without a short packet.
1441 * send a zlp if demanded by flags.
1444 if (req->req.length == req->req.actual) {
1445 if (req->req.zero && to_host)
1448 req->req.status = 0;
1450 if (urb->transfer_buffer_length == urb->actual_length) {
1451 if (urb->transfer_flags & URB_ZERO_PACKET &&
1459 /* device side completion --> continuable */
1460 if (req->req.status != -EINPROGRESS) {
1461 list_del_init(&req->queue);
1463 spin_unlock(&dum->lock);
1464 usb_gadget_giveback_request(&ep->ep, &req->req);
1465 spin_lock(&dum->lock);
1467 /* requests might have been unlinked... */
1471 /* host side completion --> terminate */
1472 if (*status != -EINPROGRESS)
1475 /* rescan to continue with any other queued i/o */
1482 static int periodic_bytes(struct dummy *dum, struct dummy_ep *ep)
1484 int limit = ep->ep.maxpacket;
1486 if (dum->gadget.speed == USB_SPEED_HIGH) {
1489 /* high bandwidth mode */
1490 tmp = usb_endpoint_maxp_mult(ep->desc);
1491 tmp *= 8 /* applies to entire frame */;
1492 limit += limit * tmp;
1494 if (dum->gadget.speed == USB_SPEED_SUPER) {
1495 switch (usb_endpoint_type(ep->desc)) {
1496 case USB_ENDPOINT_XFER_ISOC:
1497 /* Sec. 4.4.8.2 USB3.0 Spec */
1498 limit = 3 * 16 * 1024 * 8;
1500 case USB_ENDPOINT_XFER_INT:
1501 /* Sec. 4.4.7.2 USB3.0 Spec */
1502 limit = 3 * 1024 * 8;
1504 case USB_ENDPOINT_XFER_BULK:
1512 #define is_active(dum_hcd) ((dum_hcd->port_status & \
1513 (USB_PORT_STAT_CONNECTION | USB_PORT_STAT_ENABLE | \
1514 USB_PORT_STAT_SUSPEND)) \
1515 == (USB_PORT_STAT_CONNECTION | USB_PORT_STAT_ENABLE))
1517 static struct dummy_ep *find_endpoint(struct dummy *dum, u8 address)
1521 if (!is_active((dum->gadget.speed == USB_SPEED_SUPER ?
1522 dum->ss_hcd : dum->hs_hcd)))
1524 if ((address & ~USB_DIR_IN) == 0)
1526 for (i = 1; i < DUMMY_ENDPOINTS; i++) {
1527 struct dummy_ep *ep = &dum->ep[i];
1531 if (ep->desc->bEndpointAddress == address)
1539 #define Dev_Request (USB_TYPE_STANDARD | USB_RECIP_DEVICE)
1540 #define Dev_InRequest (Dev_Request | USB_DIR_IN)
1541 #define Intf_Request (USB_TYPE_STANDARD | USB_RECIP_INTERFACE)
1542 #define Intf_InRequest (Intf_Request | USB_DIR_IN)
1543 #define Ep_Request (USB_TYPE_STANDARD | USB_RECIP_ENDPOINT)
1544 #define Ep_InRequest (Ep_Request | USB_DIR_IN)
1548 * handle_control_request() - handles all control transfers
1549 * @dum: pointer to dummy (the_controller)
1550 * @urb: the urb request to handle
1551 * @setup: pointer to the setup data for a USB device control
1553 * @status: pointer to request handling status
1555 * Return 0 - if the request was handled
1556 * 1 - if the request wasn't handles
1557 * error code on error
1559 static int handle_control_request(struct dummy_hcd *dum_hcd, struct urb *urb,
1560 struct usb_ctrlrequest *setup,
1563 struct dummy_ep *ep2;
1564 struct dummy *dum = dum_hcd->dum;
1569 w_index = le16_to_cpu(setup->wIndex);
1570 w_value = le16_to_cpu(setup->wValue);
1571 switch (setup->bRequest) {
1572 case USB_REQ_SET_ADDRESS:
1573 if (setup->bRequestType != Dev_Request)
1575 dum->address = w_value;
1577 dev_dbg(udc_dev(dum), "set_address = %d\n",
1581 case USB_REQ_SET_FEATURE:
1582 if (setup->bRequestType == Dev_Request) {
1585 case USB_DEVICE_REMOTE_WAKEUP:
1587 case USB_DEVICE_B_HNP_ENABLE:
1588 dum->gadget.b_hnp_enable = 1;
1590 case USB_DEVICE_A_HNP_SUPPORT:
1591 dum->gadget.a_hnp_support = 1;
1593 case USB_DEVICE_A_ALT_HNP_SUPPORT:
1594 dum->gadget.a_alt_hnp_support = 1;
1596 case USB_DEVICE_U1_ENABLE:
1597 if (dummy_hcd_to_hcd(dum_hcd)->speed ==
1599 w_value = USB_DEV_STAT_U1_ENABLED;
1601 ret_val = -EOPNOTSUPP;
1603 case USB_DEVICE_U2_ENABLE:
1604 if (dummy_hcd_to_hcd(dum_hcd)->speed ==
1606 w_value = USB_DEV_STAT_U2_ENABLED;
1608 ret_val = -EOPNOTSUPP;
1610 case USB_DEVICE_LTM_ENABLE:
1611 if (dummy_hcd_to_hcd(dum_hcd)->speed ==
1613 w_value = USB_DEV_STAT_LTM_ENABLED;
1615 ret_val = -EOPNOTSUPP;
1618 ret_val = -EOPNOTSUPP;
1621 dum->devstatus |= (1 << w_value);
1624 } else if (setup->bRequestType == Ep_Request) {
1626 ep2 = find_endpoint(dum, w_index);
1627 if (!ep2 || ep2->ep.name == ep0name) {
1628 ret_val = -EOPNOTSUPP;
1636 case USB_REQ_CLEAR_FEATURE:
1637 if (setup->bRequestType == Dev_Request) {
1640 case USB_DEVICE_REMOTE_WAKEUP:
1641 w_value = USB_DEVICE_REMOTE_WAKEUP;
1643 case USB_DEVICE_U1_ENABLE:
1644 if (dummy_hcd_to_hcd(dum_hcd)->speed ==
1646 w_value = USB_DEV_STAT_U1_ENABLED;
1648 ret_val = -EOPNOTSUPP;
1650 case USB_DEVICE_U2_ENABLE:
1651 if (dummy_hcd_to_hcd(dum_hcd)->speed ==
1653 w_value = USB_DEV_STAT_U2_ENABLED;
1655 ret_val = -EOPNOTSUPP;
1657 case USB_DEVICE_LTM_ENABLE:
1658 if (dummy_hcd_to_hcd(dum_hcd)->speed ==
1660 w_value = USB_DEV_STAT_LTM_ENABLED;
1662 ret_val = -EOPNOTSUPP;
1665 ret_val = -EOPNOTSUPP;
1669 dum->devstatus &= ~(1 << w_value);
1672 } else if (setup->bRequestType == Ep_Request) {
1674 ep2 = find_endpoint(dum, w_index);
1676 ret_val = -EOPNOTSUPP;
1685 case USB_REQ_GET_STATUS:
1686 if (setup->bRequestType == Dev_InRequest
1687 || setup->bRequestType == Intf_InRequest
1688 || setup->bRequestType == Ep_InRequest) {
1691 * device: remote wakeup, selfpowered
1692 * interface: nothing
1695 buf = (char *)urb->transfer_buffer;
1696 if (urb->transfer_buffer_length > 0) {
1697 if (setup->bRequestType == Ep_InRequest) {
1698 ep2 = find_endpoint(dum, w_index);
1700 ret_val = -EOPNOTSUPP;
1703 buf[0] = ep2->halted;
1704 } else if (setup->bRequestType ==
1706 buf[0] = (u8)dum->devstatus;
1710 if (urb->transfer_buffer_length > 1)
1712 urb->actual_length = min_t(u32, 2,
1713 urb->transfer_buffer_length);
1722 /* drive both sides of the transfers; looks like irq handlers to
1723 * both drivers except the callbacks aren't in_irq().
1725 static void dummy_timer(unsigned long _dum_hcd)
1727 struct dummy_hcd *dum_hcd = (struct dummy_hcd *) _dum_hcd;
1728 struct dummy *dum = dum_hcd->dum;
1729 struct urbp *urbp, *tmp;
1730 unsigned long flags;
1734 /* simplistic model for one frame's bandwidth */
1735 switch (dum->gadget.speed) {
1737 total = 8/*bytes*/ * 12/*packets*/;
1739 case USB_SPEED_FULL:
1740 total = 64/*bytes*/ * 19/*packets*/;
1742 case USB_SPEED_HIGH:
1743 total = 512/*bytes*/ * 13/*packets*/ * 8/*uframes*/;
1745 case USB_SPEED_SUPER:
1746 /* Bus speed is 500000 bytes/ms, so use a little less */
1750 dev_err(dummy_dev(dum_hcd), "bogus device speed\n");
1754 /* FIXME if HZ != 1000 this will probably misbehave ... */
1756 /* look at each urb queued by the host side driver */
1757 spin_lock_irqsave(&dum->lock, flags);
1759 if (!dum_hcd->udev) {
1760 dev_err(dummy_dev(dum_hcd),
1761 "timer fired with no URBs pending?\n");
1762 spin_unlock_irqrestore(&dum->lock, flags);
1766 for (i = 0; i < DUMMY_ENDPOINTS; i++) {
1767 if (!ep_info[i].name)
1769 dum->ep[i].already_seen = 0;
1773 list_for_each_entry_safe(urbp, tmp, &dum_hcd->urbp_list, urbp_list) {
1775 struct dummy_request *req;
1777 struct dummy_ep *ep = NULL;
1779 int status = -EINPROGRESS;
1784 else if (dum_hcd->rh_state != DUMMY_RH_RUNNING)
1786 type = usb_pipetype(urb->pipe);
1788 /* used up this frame's non-periodic bandwidth?
1789 * FIXME there's infinite bandwidth for control and
1790 * periodic transfers ... unrealistic.
1792 if (total <= 0 && type == PIPE_BULK)
1795 /* find the gadget's ep for this request (if configured) */
1796 address = usb_pipeendpoint (urb->pipe);
1797 if (usb_pipein(urb->pipe))
1798 address |= USB_DIR_IN;
1799 ep = find_endpoint(dum, address);
1801 /* set_configuration() disagreement */
1802 dev_dbg(dummy_dev(dum_hcd),
1803 "no ep configured for urb %p\n",
1809 if (ep->already_seen)
1811 ep->already_seen = 1;
1812 if (ep == &dum->ep[0] && urb->error_count) {
1813 ep->setup_stage = 1; /* a new urb */
1814 urb->error_count = 0;
1816 if (ep->halted && !ep->setup_stage) {
1817 /* NOTE: must not be iso! */
1818 dev_dbg(dummy_dev(dum_hcd), "ep %s halted, urb %p\n",
1823 /* FIXME make sure both ends agree on maxpacket */
1825 /* handle control requests */
1826 if (ep == &dum->ep[0] && ep->setup_stage) {
1827 struct usb_ctrlrequest setup;
1830 setup = *(struct usb_ctrlrequest *) urb->setup_packet;
1831 /* paranoia, in case of stale queued data */
1832 list_for_each_entry(req, &ep->queue, queue) {
1833 list_del_init(&req->queue);
1834 req->req.status = -EOVERFLOW;
1835 dev_dbg(udc_dev(dum), "stale req = %p\n",
1838 spin_unlock(&dum->lock);
1839 usb_gadget_giveback_request(&ep->ep, &req->req);
1840 spin_lock(&dum->lock);
1841 ep->already_seen = 0;
1845 /* gadget driver never sees set_address or operations
1846 * on standard feature flags. some hardware doesn't
1849 ep->last_io = jiffies;
1850 ep->setup_stage = 0;
1853 value = handle_control_request(dum_hcd, urb, &setup,
1856 /* gadget driver handles all other requests. block
1857 * until setup() returns; no reentrancy issues etc.
1860 spin_unlock(&dum->lock);
1861 value = dum->driver->setup(&dum->gadget,
1863 spin_lock(&dum->lock);
1866 /* no delays (max 64KB data stage) */
1868 goto treat_control_like_bulk;
1870 /* error, see below */
1874 if (value != -EOPNOTSUPP)
1875 dev_dbg(udc_dev(dum),
1879 urb->actual_length = 0;
1885 /* non-control requests */
1887 switch (usb_pipetype(urb->pipe)) {
1888 case PIPE_ISOCHRONOUS:
1889 /* FIXME is it urb->interval since the last xfer?
1890 * use urb->iso_frame_desc[i].
1891 * complete whether or not ep has requests queued.
1892 * report random errors, to debug drivers.
1894 limit = max(limit, periodic_bytes(dum, ep));
1898 case PIPE_INTERRUPT:
1899 /* FIXME is it urb->interval since the last xfer?
1900 * this almost certainly polls too fast.
1902 limit = max(limit, periodic_bytes(dum, ep));
1906 treat_control_like_bulk:
1907 ep->last_io = jiffies;
1908 total -= transfer(dum_hcd, urb, ep, limit, &status);
1912 /* incomplete transfer? */
1913 if (status == -EINPROGRESS)
1917 list_del(&urbp->urbp_list);
1920 ep->already_seen = ep->setup_stage = 0;
1922 usb_hcd_unlink_urb_from_ep(dummy_hcd_to_hcd(dum_hcd), urb);
1923 spin_unlock(&dum->lock);
1924 usb_hcd_giveback_urb(dummy_hcd_to_hcd(dum_hcd), urb, status);
1925 spin_lock(&dum->lock);
1930 if (list_empty(&dum_hcd->urbp_list)) {
1931 usb_put_dev(dum_hcd->udev);
1932 dum_hcd->udev = NULL;
1933 } else if (dum_hcd->rh_state == DUMMY_RH_RUNNING) {
1934 /* want a 1 msec delay here */
1935 mod_timer(&dum_hcd->timer, jiffies + msecs_to_jiffies(1));
1938 spin_unlock_irqrestore(&dum->lock, flags);
1941 /*-------------------------------------------------------------------------*/
1943 #define PORT_C_MASK \
1944 ((USB_PORT_STAT_C_CONNECTION \
1945 | USB_PORT_STAT_C_ENABLE \
1946 | USB_PORT_STAT_C_SUSPEND \
1947 | USB_PORT_STAT_C_OVERCURRENT \
1948 | USB_PORT_STAT_C_RESET) << 16)
1950 static int dummy_hub_status(struct usb_hcd *hcd, char *buf)
1952 struct dummy_hcd *dum_hcd;
1953 unsigned long flags;
1956 dum_hcd = hcd_to_dummy_hcd(hcd);
1958 spin_lock_irqsave(&dum_hcd->dum->lock, flags);
1959 if (!HCD_HW_ACCESSIBLE(hcd))
1962 if (dum_hcd->resuming && time_after_eq(jiffies, dum_hcd->re_timeout)) {
1963 dum_hcd->port_status |= (USB_PORT_STAT_C_SUSPEND << 16);
1964 dum_hcd->port_status &= ~USB_PORT_STAT_SUSPEND;
1965 set_link_state(dum_hcd);
1968 if ((dum_hcd->port_status & PORT_C_MASK) != 0) {
1970 dev_dbg(dummy_dev(dum_hcd), "port status 0x%08x has changes\n",
1971 dum_hcd->port_status);
1973 if (dum_hcd->rh_state == DUMMY_RH_SUSPENDED)
1974 usb_hcd_resume_root_hub(hcd);
1977 spin_unlock_irqrestore(&dum_hcd->dum->lock, flags);
1981 /* usb 3.0 root hub device descriptor */
1983 struct usb_bos_descriptor bos;
1984 struct usb_ss_cap_descriptor ss_cap;
1985 } __packed usb3_bos_desc = {
1988 .bLength = USB_DT_BOS_SIZE,
1989 .bDescriptorType = USB_DT_BOS,
1990 .wTotalLength = cpu_to_le16(sizeof(usb3_bos_desc)),
1991 .bNumDeviceCaps = 1,
1994 .bLength = USB_DT_USB_SS_CAP_SIZE,
1995 .bDescriptorType = USB_DT_DEVICE_CAPABILITY,
1996 .bDevCapabilityType = USB_SS_CAP_TYPE,
1997 .wSpeedSupported = cpu_to_le16(USB_5GBPS_OPERATION),
1998 .bFunctionalitySupport = ilog2(USB_5GBPS_OPERATION),
2003 ss_hub_descriptor(struct usb_hub_descriptor *desc)
2005 memset(desc, 0, sizeof *desc);
2006 desc->bDescriptorType = USB_DT_SS_HUB;
2007 desc->bDescLength = 12;
2008 desc->wHubCharacteristics = cpu_to_le16(
2009 HUB_CHAR_INDV_PORT_LPSM |
2010 HUB_CHAR_COMMON_OCPM);
2011 desc->bNbrPorts = 1;
2012 desc->u.ss.bHubHdrDecLat = 0x04; /* Worst case: 0.4 micro sec*/
2013 desc->u.ss.DeviceRemovable = 0;
2016 static inline void hub_descriptor(struct usb_hub_descriptor *desc)
2018 memset(desc, 0, sizeof *desc);
2019 desc->bDescriptorType = USB_DT_HUB;
2020 desc->bDescLength = 9;
2021 desc->wHubCharacteristics = cpu_to_le16(
2022 HUB_CHAR_INDV_PORT_LPSM |
2023 HUB_CHAR_COMMON_OCPM);
2024 desc->bNbrPorts = 1;
2025 desc->u.hs.DeviceRemovable[0] = 0;
2026 desc->u.hs.DeviceRemovable[1] = 0xff; /* PortPwrCtrlMask */
2029 static int dummy_hub_control(
2030 struct usb_hcd *hcd,
2037 struct dummy_hcd *dum_hcd;
2039 unsigned long flags;
2041 if (!HCD_HW_ACCESSIBLE(hcd))
2044 dum_hcd = hcd_to_dummy_hcd(hcd);
2046 spin_lock_irqsave(&dum_hcd->dum->lock, flags);
2048 case ClearHubFeature:
2050 case ClearPortFeature:
2052 case USB_PORT_FEAT_SUSPEND:
2053 if (hcd->speed == HCD_USB3) {
2054 dev_dbg(dummy_dev(dum_hcd),
2055 "USB_PORT_FEAT_SUSPEND req not "
2056 "supported for USB 3.0 roothub\n");
2059 if (dum_hcd->port_status & USB_PORT_STAT_SUSPEND) {
2060 /* 20msec resume signaling */
2061 dum_hcd->resuming = 1;
2062 dum_hcd->re_timeout = jiffies +
2063 msecs_to_jiffies(20);
2066 case USB_PORT_FEAT_POWER:
2067 dev_dbg(dummy_dev(dum_hcd), "power-off\n");
2068 if (hcd->speed == HCD_USB3)
2069 dum_hcd->port_status &= ~USB_SS_PORT_STAT_POWER;
2071 dum_hcd->port_status &= ~USB_PORT_STAT_POWER;
2072 set_link_state(dum_hcd);
2075 dum_hcd->port_status &= ~(1 << wValue);
2076 set_link_state(dum_hcd);
2079 case GetHubDescriptor:
2080 if (hcd->speed == HCD_USB3 &&
2081 (wLength < USB_DT_SS_HUB_SIZE ||
2082 wValue != (USB_DT_SS_HUB << 8))) {
2083 dev_dbg(dummy_dev(dum_hcd),
2084 "Wrong hub descriptor type for "
2085 "USB 3.0 roothub.\n");
2088 if (hcd->speed == HCD_USB3)
2089 ss_hub_descriptor((struct usb_hub_descriptor *) buf);
2091 hub_descriptor((struct usb_hub_descriptor *) buf);
2094 case DeviceRequest | USB_REQ_GET_DESCRIPTOR:
2095 if (hcd->speed != HCD_USB3)
2098 if ((wValue >> 8) != USB_DT_BOS)
2101 memcpy(buf, &usb3_bos_desc, sizeof(usb3_bos_desc));
2102 retval = sizeof(usb3_bos_desc);
2106 *(__le32 *) buf = cpu_to_le32(0);
2112 /* whoever resets or resumes must GetPortStatus to
2115 if (dum_hcd->resuming &&
2116 time_after_eq(jiffies, dum_hcd->re_timeout)) {
2117 dum_hcd->port_status |= (USB_PORT_STAT_C_SUSPEND << 16);
2118 dum_hcd->port_status &= ~USB_PORT_STAT_SUSPEND;
2120 if ((dum_hcd->port_status & USB_PORT_STAT_RESET) != 0 &&
2121 time_after_eq(jiffies, dum_hcd->re_timeout)) {
2122 dum_hcd->port_status |= (USB_PORT_STAT_C_RESET << 16);
2123 dum_hcd->port_status &= ~USB_PORT_STAT_RESET;
2124 if (dum_hcd->dum->pullup) {
2125 dum_hcd->port_status |= USB_PORT_STAT_ENABLE;
2127 if (hcd->speed < HCD_USB3) {
2128 switch (dum_hcd->dum->gadget.speed) {
2129 case USB_SPEED_HIGH:
2130 dum_hcd->port_status |=
2131 USB_PORT_STAT_HIGH_SPEED;
2134 dum_hcd->dum->gadget.ep0->
2136 dum_hcd->port_status |=
2137 USB_PORT_STAT_LOW_SPEED;
2140 dum_hcd->dum->gadget.speed =
2147 set_link_state(dum_hcd);
2148 ((__le16 *) buf)[0] = cpu_to_le16(dum_hcd->port_status);
2149 ((__le16 *) buf)[1] = cpu_to_le16(dum_hcd->port_status >> 16);
2154 case SetPortFeature:
2156 case USB_PORT_FEAT_LINK_STATE:
2157 if (hcd->speed != HCD_USB3) {
2158 dev_dbg(dummy_dev(dum_hcd),
2159 "USB_PORT_FEAT_LINK_STATE req not "
2160 "supported for USB 2.0 roothub\n");
2164 * Since this is dummy we don't have an actual link so
2165 * there is nothing to do for the SET_LINK_STATE cmd
2168 case USB_PORT_FEAT_U1_TIMEOUT:
2169 case USB_PORT_FEAT_U2_TIMEOUT:
2170 /* TODO: add suspend/resume support! */
2171 if (hcd->speed != HCD_USB3) {
2172 dev_dbg(dummy_dev(dum_hcd),
2173 "USB_PORT_FEAT_U1/2_TIMEOUT req not "
2174 "supported for USB 2.0 roothub\n");
2178 case USB_PORT_FEAT_SUSPEND:
2179 /* Applicable only for USB2.0 hub */
2180 if (hcd->speed == HCD_USB3) {
2181 dev_dbg(dummy_dev(dum_hcd),
2182 "USB_PORT_FEAT_SUSPEND req not "
2183 "supported for USB 3.0 roothub\n");
2186 if (dum_hcd->active) {
2187 dum_hcd->port_status |= USB_PORT_STAT_SUSPEND;
2189 /* HNP would happen here; for now we
2190 * assume b_bus_req is always true.
2192 set_link_state(dum_hcd);
2193 if (((1 << USB_DEVICE_B_HNP_ENABLE)
2194 & dum_hcd->dum->devstatus) != 0)
2195 dev_dbg(dummy_dev(dum_hcd),
2199 case USB_PORT_FEAT_POWER:
2200 if (hcd->speed == HCD_USB3)
2201 dum_hcd->port_status |= USB_SS_PORT_STAT_POWER;
2203 dum_hcd->port_status |= USB_PORT_STAT_POWER;
2204 set_link_state(dum_hcd);
2206 case USB_PORT_FEAT_BH_PORT_RESET:
2207 /* Applicable only for USB3.0 hub */
2208 if (hcd->speed != HCD_USB3) {
2209 dev_dbg(dummy_dev(dum_hcd),
2210 "USB_PORT_FEAT_BH_PORT_RESET req not "
2211 "supported for USB 2.0 roothub\n");
2215 case USB_PORT_FEAT_RESET:
2216 /* if it's already enabled, disable */
2217 if (hcd->speed == HCD_USB3) {
2218 dum_hcd->port_status = 0;
2219 dum_hcd->port_status =
2220 (USB_SS_PORT_STAT_POWER |
2221 USB_PORT_STAT_CONNECTION |
2222 USB_PORT_STAT_RESET);
2224 dum_hcd->port_status &= ~(USB_PORT_STAT_ENABLE
2225 | USB_PORT_STAT_LOW_SPEED
2226 | USB_PORT_STAT_HIGH_SPEED);
2228 * We want to reset device status. All but the
2229 * Self powered feature
2231 dum_hcd->dum->devstatus &=
2232 (1 << USB_DEVICE_SELF_POWERED);
2234 * FIXME USB3.0: what is the correct reset signaling
2235 * interval? Is it still 50msec as for HS?
2237 dum_hcd->re_timeout = jiffies + msecs_to_jiffies(50);
2240 if (hcd->speed == HCD_USB3) {
2241 if ((dum_hcd->port_status &
2242 USB_SS_PORT_STAT_POWER) != 0) {
2243 dum_hcd->port_status |= (1 << wValue);
2246 if ((dum_hcd->port_status &
2247 USB_PORT_STAT_POWER) != 0) {
2248 dum_hcd->port_status |= (1 << wValue);
2250 set_link_state(dum_hcd);
2253 case GetPortErrorCount:
2254 if (hcd->speed != HCD_USB3) {
2255 dev_dbg(dummy_dev(dum_hcd),
2256 "GetPortErrorCount req not "
2257 "supported for USB 2.0 roothub\n");
2260 /* We'll always return 0 since this is a dummy hub */
2261 *(__le32 *) buf = cpu_to_le32(0);
2264 if (hcd->speed != HCD_USB3) {
2265 dev_dbg(dummy_dev(dum_hcd),
2266 "SetHubDepth req not supported for "
2267 "USB 2.0 roothub\n");
2272 dev_dbg(dummy_dev(dum_hcd),
2273 "hub control req%04x v%04x i%04x l%d\n",
2274 typeReq, wValue, wIndex, wLength);
2276 /* "protocol stall" on error */
2279 spin_unlock_irqrestore(&dum_hcd->dum->lock, flags);
2281 if ((dum_hcd->port_status & PORT_C_MASK) != 0)
2282 usb_hcd_poll_rh_status(hcd);
2286 static int dummy_bus_suspend(struct usb_hcd *hcd)
2288 struct dummy_hcd *dum_hcd = hcd_to_dummy_hcd(hcd);
2290 dev_dbg(&hcd->self.root_hub->dev, "%s\n", __func__);
2292 spin_lock_irq(&dum_hcd->dum->lock);
2293 dum_hcd->rh_state = DUMMY_RH_SUSPENDED;
2294 set_link_state(dum_hcd);
2295 hcd->state = HC_STATE_SUSPENDED;
2296 spin_unlock_irq(&dum_hcd->dum->lock);
2300 static int dummy_bus_resume(struct usb_hcd *hcd)
2302 struct dummy_hcd *dum_hcd = hcd_to_dummy_hcd(hcd);
2305 dev_dbg(&hcd->self.root_hub->dev, "%s\n", __func__);
2307 spin_lock_irq(&dum_hcd->dum->lock);
2308 if (!HCD_HW_ACCESSIBLE(hcd)) {
2311 dum_hcd->rh_state = DUMMY_RH_RUNNING;
2312 set_link_state(dum_hcd);
2313 if (!list_empty(&dum_hcd->urbp_list))
2314 mod_timer(&dum_hcd->timer, jiffies);
2315 hcd->state = HC_STATE_RUNNING;
2317 spin_unlock_irq(&dum_hcd->dum->lock);
2321 /*-------------------------------------------------------------------------*/
2323 static inline ssize_t show_urb(char *buf, size_t size, struct urb *urb)
2325 int ep = usb_pipeendpoint(urb->pipe);
2327 return snprintf(buf, size,
2328 "urb/%p %s ep%d%s%s len %d/%d\n",
2331 switch (urb->dev->speed) {
2335 case USB_SPEED_FULL:
2338 case USB_SPEED_HIGH:
2341 case USB_SPEED_SUPER:
2348 ep, ep ? (usb_pipein(urb->pipe) ? "in" : "out") : "",
2350 switch (usb_pipetype(urb->pipe)) { \
2351 case PIPE_CONTROL: \
2357 case PIPE_INTERRUPT: \
2364 urb->actual_length, urb->transfer_buffer_length);
2367 static ssize_t urbs_show(struct device *dev, struct device_attribute *attr,
2370 struct usb_hcd *hcd = dev_get_drvdata(dev);
2371 struct dummy_hcd *dum_hcd = hcd_to_dummy_hcd(hcd);
2374 unsigned long flags;
2376 spin_lock_irqsave(&dum_hcd->dum->lock, flags);
2377 list_for_each_entry(urbp, &dum_hcd->urbp_list, urbp_list) {
2380 temp = show_urb(buf, PAGE_SIZE - size, urbp->urb);
2384 spin_unlock_irqrestore(&dum_hcd->dum->lock, flags);
2388 static DEVICE_ATTR_RO(urbs);
2390 static int dummy_start_ss(struct dummy_hcd *dum_hcd)
2392 init_timer(&dum_hcd->timer);
2393 dum_hcd->timer.function = dummy_timer;
2394 dum_hcd->timer.data = (unsigned long)dum_hcd;
2395 dum_hcd->rh_state = DUMMY_RH_RUNNING;
2396 dum_hcd->stream_en_ep = 0;
2397 INIT_LIST_HEAD(&dum_hcd->urbp_list);
2398 dummy_hcd_to_hcd(dum_hcd)->power_budget = POWER_BUDGET;
2399 dummy_hcd_to_hcd(dum_hcd)->state = HC_STATE_RUNNING;
2400 dummy_hcd_to_hcd(dum_hcd)->uses_new_polling = 1;
2401 #ifdef CONFIG_USB_OTG
2402 dummy_hcd_to_hcd(dum_hcd)->self.otg_port = 1;
2406 /* FIXME 'urbs' should be a per-device thing, maybe in usbcore */
2407 return device_create_file(dummy_dev(dum_hcd), &dev_attr_urbs);
2410 static int dummy_start(struct usb_hcd *hcd)
2412 struct dummy_hcd *dum_hcd = hcd_to_dummy_hcd(hcd);
2415 * MASTER side init ... we emulate a root hub that'll only ever
2416 * talk to one device (the slave side). Also appears in sysfs,
2417 * just like more familiar pci-based HCDs.
2419 if (!usb_hcd_is_primary_hcd(hcd))
2420 return dummy_start_ss(dum_hcd);
2422 spin_lock_init(&dum_hcd->dum->lock);
2423 init_timer(&dum_hcd->timer);
2424 dum_hcd->timer.function = dummy_timer;
2425 dum_hcd->timer.data = (unsigned long)dum_hcd;
2426 dum_hcd->rh_state = DUMMY_RH_RUNNING;
2428 INIT_LIST_HEAD(&dum_hcd->urbp_list);
2430 hcd->power_budget = POWER_BUDGET;
2431 hcd->state = HC_STATE_RUNNING;
2432 hcd->uses_new_polling = 1;
2434 #ifdef CONFIG_USB_OTG
2435 hcd->self.otg_port = 1;
2438 /* FIXME 'urbs' should be a per-device thing, maybe in usbcore */
2439 return device_create_file(dummy_dev(dum_hcd), &dev_attr_urbs);
2442 static void dummy_stop(struct usb_hcd *hcd)
2444 device_remove_file(dummy_dev(hcd_to_dummy_hcd(hcd)), &dev_attr_urbs);
2445 dev_info(dummy_dev(hcd_to_dummy_hcd(hcd)), "stopped\n");
2448 /*-------------------------------------------------------------------------*/
2450 static int dummy_h_get_frame(struct usb_hcd *hcd)
2452 return dummy_g_get_frame(NULL);
2455 static int dummy_setup(struct usb_hcd *hcd)
2459 dum = *((void **)dev_get_platdata(hcd->self.controller));
2460 hcd->self.sg_tablesize = ~0;
2461 if (usb_hcd_is_primary_hcd(hcd)) {
2462 dum->hs_hcd = hcd_to_dummy_hcd(hcd);
2463 dum->hs_hcd->dum = dum;
2465 * Mark the first roothub as being USB 2.0.
2466 * The USB 3.0 roothub will be registered later by
2469 hcd->speed = HCD_USB2;
2470 hcd->self.root_hub->speed = USB_SPEED_HIGH;
2472 dum->ss_hcd = hcd_to_dummy_hcd(hcd);
2473 dum->ss_hcd->dum = dum;
2474 hcd->speed = HCD_USB3;
2475 hcd->self.root_hub->speed = USB_SPEED_SUPER;
2480 /* Change a group of bulk endpoints to support multiple stream IDs */
2481 static int dummy_alloc_streams(struct usb_hcd *hcd, struct usb_device *udev,
2482 struct usb_host_endpoint **eps, unsigned int num_eps,
2483 unsigned int num_streams, gfp_t mem_flags)
2485 struct dummy_hcd *dum_hcd = hcd_to_dummy_hcd(hcd);
2486 unsigned long flags;
2488 int ret_streams = num_streams;
2495 spin_lock_irqsave(&dum_hcd->dum->lock, flags);
2496 for (i = 0; i < num_eps; i++) {
2497 index = dummy_get_ep_idx(&eps[i]->desc);
2498 if ((1 << index) & dum_hcd->stream_en_ep) {
2499 ret_streams = -EINVAL;
2502 max_stream = usb_ss_max_streams(&eps[i]->ss_ep_comp);
2504 ret_streams = -EINVAL;
2507 if (max_stream < ret_streams) {
2508 dev_dbg(dummy_dev(dum_hcd), "Ep 0x%x only supports %u "
2510 eps[i]->desc.bEndpointAddress,
2512 ret_streams = max_stream;
2516 for (i = 0; i < num_eps; i++) {
2517 index = dummy_get_ep_idx(&eps[i]->desc);
2518 dum_hcd->stream_en_ep |= 1 << index;
2519 set_max_streams_for_pipe(dum_hcd,
2520 usb_endpoint_num(&eps[i]->desc), ret_streams);
2523 spin_unlock_irqrestore(&dum_hcd->dum->lock, flags);
2527 /* Reverts a group of bulk endpoints back to not using stream IDs. */
2528 static int dummy_free_streams(struct usb_hcd *hcd, struct usb_device *udev,
2529 struct usb_host_endpoint **eps, unsigned int num_eps,
2532 struct dummy_hcd *dum_hcd = hcd_to_dummy_hcd(hcd);
2533 unsigned long flags;
2538 spin_lock_irqsave(&dum_hcd->dum->lock, flags);
2539 for (i = 0; i < num_eps; i++) {
2540 index = dummy_get_ep_idx(&eps[i]->desc);
2541 if (!((1 << index) & dum_hcd->stream_en_ep)) {
2547 for (i = 0; i < num_eps; i++) {
2548 index = dummy_get_ep_idx(&eps[i]->desc);
2549 dum_hcd->stream_en_ep &= ~(1 << index);
2550 set_max_streams_for_pipe(dum_hcd,
2551 usb_endpoint_num(&eps[i]->desc), 0);
2555 spin_unlock_irqrestore(&dum_hcd->dum->lock, flags);
2559 static struct hc_driver dummy_hcd = {
2560 .description = (char *) driver_name,
2561 .product_desc = "Dummy host controller",
2562 .hcd_priv_size = sizeof(struct dummy_hcd),
2564 .flags = HCD_USB3 | HCD_SHARED,
2566 .reset = dummy_setup,
2567 .start = dummy_start,
2570 .urb_enqueue = dummy_urb_enqueue,
2571 .urb_dequeue = dummy_urb_dequeue,
2573 .get_frame_number = dummy_h_get_frame,
2575 .hub_status_data = dummy_hub_status,
2576 .hub_control = dummy_hub_control,
2577 .bus_suspend = dummy_bus_suspend,
2578 .bus_resume = dummy_bus_resume,
2580 .alloc_streams = dummy_alloc_streams,
2581 .free_streams = dummy_free_streams,
2584 static int dummy_hcd_probe(struct platform_device *pdev)
2587 struct usb_hcd *hs_hcd;
2588 struct usb_hcd *ss_hcd;
2591 dev_info(&pdev->dev, "%s, driver " DRIVER_VERSION "\n", driver_desc);
2592 dum = *((void **)dev_get_platdata(&pdev->dev));
2594 if (!mod_data.is_super_speed)
2595 dummy_hcd.flags = HCD_USB2;
2596 hs_hcd = usb_create_hcd(&dummy_hcd, &pdev->dev, dev_name(&pdev->dev));
2601 retval = usb_add_hcd(hs_hcd, 0, 0);
2605 if (mod_data.is_super_speed) {
2606 ss_hcd = usb_create_shared_hcd(&dummy_hcd, &pdev->dev,
2607 dev_name(&pdev->dev), hs_hcd);
2610 goto dealloc_usb2_hcd;
2613 retval = usb_add_hcd(ss_hcd, 0, 0);
2620 usb_put_hcd(ss_hcd);
2622 usb_remove_hcd(hs_hcd);
2624 usb_put_hcd(hs_hcd);
2625 dum->hs_hcd = dum->ss_hcd = NULL;
2629 static int dummy_hcd_remove(struct platform_device *pdev)
2633 dum = hcd_to_dummy_hcd(platform_get_drvdata(pdev))->dum;
2636 usb_remove_hcd(dummy_hcd_to_hcd(dum->ss_hcd));
2637 usb_put_hcd(dummy_hcd_to_hcd(dum->ss_hcd));
2640 usb_remove_hcd(dummy_hcd_to_hcd(dum->hs_hcd));
2641 usb_put_hcd(dummy_hcd_to_hcd(dum->hs_hcd));
2649 static int dummy_hcd_suspend(struct platform_device *pdev, pm_message_t state)
2651 struct usb_hcd *hcd;
2652 struct dummy_hcd *dum_hcd;
2655 dev_dbg(&pdev->dev, "%s\n", __func__);
2657 hcd = platform_get_drvdata(pdev);
2658 dum_hcd = hcd_to_dummy_hcd(hcd);
2659 if (dum_hcd->rh_state == DUMMY_RH_RUNNING) {
2660 dev_warn(&pdev->dev, "Root hub isn't suspended!\n");
2663 clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
2667 static int dummy_hcd_resume(struct platform_device *pdev)
2669 struct usb_hcd *hcd;
2671 dev_dbg(&pdev->dev, "%s\n", __func__);
2673 hcd = platform_get_drvdata(pdev);
2674 set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
2675 usb_hcd_poll_rh_status(hcd);
2679 static struct platform_driver dummy_hcd_driver = {
2680 .probe = dummy_hcd_probe,
2681 .remove = dummy_hcd_remove,
2682 .suspend = dummy_hcd_suspend,
2683 .resume = dummy_hcd_resume,
2685 .name = (char *) driver_name,
2689 /*-------------------------------------------------------------------------*/
2690 #define MAX_NUM_UDC 2
2691 static struct platform_device *the_udc_pdev[MAX_NUM_UDC];
2692 static struct platform_device *the_hcd_pdev[MAX_NUM_UDC];
2694 static int __init init(void)
2696 int retval = -ENOMEM;
2698 struct dummy *dum[MAX_NUM_UDC];
2703 if (!mod_data.is_high_speed && mod_data.is_super_speed)
2706 if (mod_data.num < 1 || mod_data.num > MAX_NUM_UDC) {
2707 pr_err("Number of emulated UDC must be in range of 1...%d\n",
2712 for (i = 0; i < mod_data.num; i++) {
2713 the_hcd_pdev[i] = platform_device_alloc(driver_name, i);
2714 if (!the_hcd_pdev[i]) {
2717 platform_device_put(the_hcd_pdev[i--]);
2721 for (i = 0; i < mod_data.num; i++) {
2722 the_udc_pdev[i] = platform_device_alloc(gadget_name, i);
2723 if (!the_udc_pdev[i]) {
2726 platform_device_put(the_udc_pdev[i--]);
2730 for (i = 0; i < mod_data.num; i++) {
2731 dum[i] = kzalloc(sizeof(struct dummy), GFP_KERNEL);
2736 retval = platform_device_add_data(the_hcd_pdev[i], &dum[i],
2740 retval = platform_device_add_data(the_udc_pdev[i], &dum[i],
2746 retval = platform_driver_register(&dummy_hcd_driver);
2749 retval = platform_driver_register(&dummy_udc_driver);
2751 goto err_register_udc_driver;
2753 for (i = 0; i < mod_data.num; i++) {
2754 retval = platform_device_add(the_hcd_pdev[i]);
2758 platform_device_del(the_hcd_pdev[i--]);
2762 for (i = 0; i < mod_data.num; i++) {
2763 if (!dum[i]->hs_hcd ||
2764 (!dum[i]->ss_hcd && mod_data.is_super_speed)) {
2766 * The hcd was added successfully but its probe
2767 * function failed for some reason.
2774 for (i = 0; i < mod_data.num; i++) {
2775 retval = platform_device_add(the_udc_pdev[i]);
2779 platform_device_del(the_udc_pdev[i--]);
2784 for (i = 0; i < mod_data.num; i++) {
2785 if (!platform_get_drvdata(the_udc_pdev[i])) {
2787 * The udc was added successfully but its probe
2788 * function failed for some reason.
2797 for (i = 0; i < mod_data.num; i++)
2798 platform_device_del(the_udc_pdev[i]);
2800 for (i = 0; i < mod_data.num; i++)
2801 platform_device_del(the_hcd_pdev[i]);
2803 platform_driver_unregister(&dummy_udc_driver);
2804 err_register_udc_driver:
2805 platform_driver_unregister(&dummy_hcd_driver);
2807 for (i = 0; i < mod_data.num; i++)
2809 for (i = 0; i < mod_data.num; i++)
2810 platform_device_put(the_udc_pdev[i]);
2812 for (i = 0; i < mod_data.num; i++)
2813 platform_device_put(the_hcd_pdev[i]);
2818 static void __exit cleanup(void)
2822 for (i = 0; i < mod_data.num; i++) {
2825 dum = *((void **)dev_get_platdata(&the_udc_pdev[i]->dev));
2827 platform_device_unregister(the_udc_pdev[i]);
2828 platform_device_unregister(the_hcd_pdev[i]);
2831 platform_driver_unregister(&dummy_udc_driver);
2832 platform_driver_unregister(&dummy_hcd_driver);
2834 module_exit(cleanup);