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1// SPDX-License-Identifier: GPL-2.0
2/*
3 * mtu3_gadget.c - MediaTek usb3 DRD peripheral support
4 *
5 * Copyright (C) 2016 MediaTek Inc.
6 *
7 * Author: Chunfeng Yun <chunfeng.yun@mediatek.com>
8 */
9
10#include "mtu3.h"
11#include "mtu3_trace.h"
12
13void mtu3_req_complete(struct mtu3_ep *mep,
14 struct usb_request *req, int status)
15__releases(mep->mtu->lock)
16__acquires(mep->mtu->lock)
17{
18 struct mtu3_request *mreq = to_mtu3_request(req);
19 struct mtu3 *mtu = mreq->mtu;
20
21 list_del(&mreq->list);
22 if (req->status == -EINPROGRESS)
23 req->status = status;
24
25 trace_mtu3_req_complete(mreq);
26 spin_unlock(&mtu->lock);
27
28 /* ep0 makes use of PIO, needn't unmap it */
29 if (mep->epnum)
30 usb_gadget_unmap_request(&mtu->g, req, mep->is_in);
31
32 dev_dbg(mtu->dev, "%s complete req: %p, sts %d, %d/%d\n",
33 mep->name, req, req->status, req->actual, req->length);
34
35 usb_gadget_giveback_request(&mep->ep, req);
36 spin_lock(&mtu->lock);
37}
38
39static void nuke(struct mtu3_ep *mep, const int status)
40{
41 struct mtu3_request *mreq = NULL;
42
43 if (list_empty(&mep->req_list))
44 return;
45
46 dev_dbg(mep->mtu->dev, "abort %s's req: sts %d\n", mep->name, status);
47
48 /* exclude EP0 */
49 if (mep->epnum)
50 mtu3_qmu_flush(mep);
51
52 while (!list_empty(&mep->req_list)) {
53 mreq = list_first_entry(&mep->req_list,
54 struct mtu3_request, list);
55 mtu3_req_complete(mep, &mreq->request, status);
56 }
57}
58
59static int mtu3_ep_enable(struct mtu3_ep *mep)
60{
61 const struct usb_endpoint_descriptor *desc;
62 const struct usb_ss_ep_comp_descriptor *comp_desc;
63 struct mtu3 *mtu = mep->mtu;
64 u32 interval = 0;
65 u32 mult = 0;
66 u32 burst = 0;
67 int ret;
68
69 desc = mep->desc;
70 comp_desc = mep->comp_desc;
71 mep->type = usb_endpoint_type(desc);
72 mep->maxp = usb_endpoint_maxp(desc);
73
74 switch (mtu->g.speed) {
75 case USB_SPEED_SUPER:
76 case USB_SPEED_SUPER_PLUS:
77 if (usb_endpoint_xfer_int(desc) ||
78 usb_endpoint_xfer_isoc(desc)) {
79 interval = desc->bInterval;
80 interval = clamp_val(interval, 1, 16) - 1;
81 if (usb_endpoint_xfer_isoc(desc) && comp_desc)
82 mult = comp_desc->bmAttributes;
83 }
84 if (comp_desc)
85 burst = comp_desc->bMaxBurst;
86
87 break;
88 case USB_SPEED_HIGH:
89 if (usb_endpoint_xfer_isoc(desc) ||
90 usb_endpoint_xfer_int(desc)) {
91 interval = desc->bInterval;
92 interval = clamp_val(interval, 1, 16) - 1;
93 mult = usb_endpoint_maxp_mult(desc) - 1;
94 }
95 break;
96 default:
97 break; /*others are ignored */
98 }
99
100 dev_dbg(mtu->dev, "%s maxp:%d, interval:%d, burst:%d, mult:%d\n",
101 __func__, mep->maxp, interval, burst, mult);
102
103 mep->ep.maxpacket = mep->maxp;
104 mep->ep.desc = desc;
105 mep->ep.comp_desc = comp_desc;
106
107 /* slot mainly affects bulk/isoc transfer, so ignore int */
108 mep->slot = usb_endpoint_xfer_int(desc) ? 0 : mtu->slot;
109
110 ret = mtu3_config_ep(mtu, mep, interval, burst, mult);
111 if (ret < 0)
112 return ret;
113
114 ret = mtu3_gpd_ring_alloc(mep);
115 if (ret < 0) {
116 mtu3_deconfig_ep(mtu, mep);
117 return ret;
118 }
119
120 mtu3_qmu_start(mep);
121
122 return 0;
123}
124
125static int mtu3_ep_disable(struct mtu3_ep *mep)
126{
127 struct mtu3 *mtu = mep->mtu;
128
129 mtu3_qmu_stop(mep);
130
131 /* abort all pending requests */
132 nuke(mep, -ESHUTDOWN);
133 mtu3_deconfig_ep(mtu, mep);
134 mtu3_gpd_ring_free(mep);
135
136 mep->desc = NULL;
137 mep->ep.desc = NULL;
138 mep->comp_desc = NULL;
139 mep->type = 0;
140 mep->flags = 0;
141
142 return 0;
143}
144
145static int mtu3_gadget_ep_enable(struct usb_ep *ep,
146 const struct usb_endpoint_descriptor *desc)
147{
148 struct mtu3_ep *mep;
149 struct mtu3 *mtu;
150 unsigned long flags;
151 int ret = -EINVAL;
152
153 if (!ep || !desc || desc->bDescriptorType != USB_DT_ENDPOINT) {
154 pr_debug("%s invalid parameters\n", __func__);
155 return -EINVAL;
156 }
157
158 if (!desc->wMaxPacketSize) {
159 pr_debug("%s missing wMaxPacketSize\n", __func__);
160 return -EINVAL;
161 }
162 mep = to_mtu3_ep(ep);
163 mtu = mep->mtu;
164
165 /* check ep number and direction against endpoint */
166 if (usb_endpoint_num(desc) != mep->epnum)
167 return -EINVAL;
168
169 if (!!usb_endpoint_dir_in(desc) ^ !!mep->is_in)
170 return -EINVAL;
171
172 dev_dbg(mtu->dev, "%s %s\n", __func__, ep->name);
173
174 if (mep->flags & MTU3_EP_ENABLED) {
175 dev_WARN_ONCE(mtu->dev, true, "%s is already enabled\n",
176 mep->name);
177 return 0;
178 }
179
180 spin_lock_irqsave(&mtu->lock, flags);
181 mep->desc = desc;
182 mep->comp_desc = ep->comp_desc;
183
184 ret = mtu3_ep_enable(mep);
185 if (ret)
186 goto error;
187
188 mep->flags = MTU3_EP_ENABLED;
189 mtu->active_ep++;
190
191error:
192 spin_unlock_irqrestore(&mtu->lock, flags);
193
194 dev_dbg(mtu->dev, "%s active_ep=%d\n", __func__, mtu->active_ep);
195 trace_mtu3_gadget_ep_enable(mep);
196
197 return ret;
198}
199
200static int mtu3_gadget_ep_disable(struct usb_ep *ep)
201{
202 struct mtu3_ep *mep = to_mtu3_ep(ep);
203 struct mtu3 *mtu = mep->mtu;
204 unsigned long flags;
205
206 dev_dbg(mtu->dev, "%s %s\n", __func__, mep->name);
207 trace_mtu3_gadget_ep_disable(mep);
208
209 if (!(mep->flags & MTU3_EP_ENABLED)) {
210 dev_warn(mtu->dev, "%s is already disabled\n", mep->name);
211 return 0;
212 }
213
214 spin_lock_irqsave(&mtu->lock, flags);
215 mtu3_ep_disable(mep);
216 mep->flags = 0;
217 mtu->active_ep--;
218 spin_unlock_irqrestore(&(mtu->lock), flags);
219
220 dev_dbg(mtu->dev, "%s active_ep=%d, mtu3 is_active=%d\n",
221 __func__, mtu->active_ep, mtu->is_active);
222
223 return 0;
224}
225
226struct usb_request *mtu3_alloc_request(struct usb_ep *ep, gfp_t gfp_flags)
227{
228 struct mtu3_ep *mep = to_mtu3_ep(ep);
229 struct mtu3_request *mreq;
230
231 mreq = kzalloc(sizeof(*mreq), gfp_flags);
232 if (!mreq)
233 return NULL;
234
235 mreq->request.dma = DMA_ADDR_INVALID;
236 mreq->epnum = mep->epnum;
237 mreq->mep = mep;
238 trace_mtu3_alloc_request(mreq);
239
240 return &mreq->request;
241}
242
243void mtu3_free_request(struct usb_ep *ep, struct usb_request *req)
244{
245 struct mtu3_request *mreq = to_mtu3_request(req);
246
247 trace_mtu3_free_request(mreq);
248 kfree(mreq);
249}
250
251static int mtu3_gadget_queue(struct usb_ep *ep,
252 struct usb_request *req, gfp_t gfp_flags)
253{
254 struct mtu3_ep *mep = to_mtu3_ep(ep);
255 struct mtu3_request *mreq = to_mtu3_request(req);
256 struct mtu3 *mtu = mep->mtu;
257 unsigned long flags;
258 int ret = 0;
259
260 if (!req->buf)
261 return -ENODATA;
262
263 if (mreq->mep != mep)
264 return -EINVAL;
265
266 dev_dbg(mtu->dev, "%s %s EP%d(%s), req=%p, maxp=%d, len#%d\n",
267 __func__, mep->is_in ? "TX" : "RX", mreq->epnum, ep->name,
268 mreq, ep->maxpacket, mreq->request.length);
269
270 if (req->length > GPD_BUF_SIZE ||
271 (mtu->gen2cp && req->length > GPD_BUF_SIZE_EL)) {
272 dev_warn(mtu->dev,
273 "req length > supported MAX:%d requested:%d\n",
274 mtu->gen2cp ? GPD_BUF_SIZE_EL : GPD_BUF_SIZE,
275 req->length);
276 return -EOPNOTSUPP;
277 }
278
279 /* don't queue if the ep is down */
280 if (!mep->desc) {
281 dev_dbg(mtu->dev, "req=%p queued to %s while it's disabled\n",
282 req, ep->name);
283 return -ESHUTDOWN;
284 }
285
286 mreq->mtu = mtu;
287 mreq->request.actual = 0;
288 mreq->request.status = -EINPROGRESS;
289
290 ret = usb_gadget_map_request(&mtu->g, req, mep->is_in);
291 if (ret) {
292 dev_err(mtu->dev, "dma mapping failed\n");
293 return ret;
294 }
295
296 spin_lock_irqsave(&mtu->lock, flags);
297
298 if (mtu3_prepare_transfer(mep)) {
299 ret = -EAGAIN;
300 goto error;
301 }
302
303 list_add_tail(&mreq->list, &mep->req_list);
304 mtu3_insert_gpd(mep, mreq);
305 mtu3_qmu_resume(mep);
306
307error:
308 spin_unlock_irqrestore(&mtu->lock, flags);
309 trace_mtu3_gadget_queue(mreq);
310
311 return ret;
312}
313
314static int mtu3_gadget_dequeue(struct usb_ep *ep, struct usb_request *req)
315{
316 struct mtu3_ep *mep = to_mtu3_ep(ep);
317 struct mtu3_request *mreq = to_mtu3_request(req);
318 struct mtu3_request *r;
319 struct mtu3 *mtu = mep->mtu;
320 unsigned long flags;
321 int ret = 0;
322
323 if (mreq->mep != mep)
324 return -EINVAL;
325
326 dev_dbg(mtu->dev, "%s : req=%p\n", __func__, req);
327 trace_mtu3_gadget_dequeue(mreq);
328
329 spin_lock_irqsave(&mtu->lock, flags);
330
331 list_for_each_entry(r, &mep->req_list, list) {
332 if (r == mreq)
333 break;
334 }
335 if (r != mreq) {
336 dev_dbg(mtu->dev, "req=%p not queued to %s\n", req, ep->name);
337 ret = -EINVAL;
338 goto done;
339 }
340
341 mtu3_qmu_flush(mep); /* REVISIT: set BPS ?? */
342 mtu3_req_complete(mep, req, -ECONNRESET);
343 mtu3_qmu_start(mep);
344
345done:
346 spin_unlock_irqrestore(&mtu->lock, flags);
347
348 return ret;
349}
350
351/*
352 * Set or clear the halt bit of an EP.
353 * A halted EP won't TX/RX any data but will queue requests.
354 */
355static int mtu3_gadget_ep_set_halt(struct usb_ep *ep, int value)
356{
357 struct mtu3_ep *mep = to_mtu3_ep(ep);
358 struct mtu3 *mtu = mep->mtu;
359 struct mtu3_request *mreq;
360 unsigned long flags;
361 int ret = 0;
362
363 dev_dbg(mtu->dev, "%s : %s...", __func__, ep->name);
364
365 spin_lock_irqsave(&mtu->lock, flags);
366
367 if (mep->type == USB_ENDPOINT_XFER_ISOC) {
368 ret = -EINVAL;
369 goto done;
370 }
371
372 mreq = next_request(mep);
373 if (value) {
374 /*
375 * If there is not request for TX-EP, QMU will not transfer
376 * data to TX-FIFO, so no need check whether TX-FIFO
377 * holds bytes or not here
378 */
379 if (mreq) {
380 dev_dbg(mtu->dev, "req in progress, cannot halt %s\n",
381 ep->name);
382 ret = -EAGAIN;
383 goto done;
384 }
385 } else {
386 mep->flags &= ~MTU3_EP_WEDGE;
387 }
388
389 dev_dbg(mtu->dev, "%s %s stall\n", ep->name, value ? "set" : "clear");
390
391 mtu3_ep_stall_set(mep, value);
392
393done:
394 spin_unlock_irqrestore(&mtu->lock, flags);
395 trace_mtu3_gadget_ep_set_halt(mep);
396
397 return ret;
398}
399
400/* Sets the halt feature with the clear requests ignored */
401static int mtu3_gadget_ep_set_wedge(struct usb_ep *ep)
402{
403 struct mtu3_ep *mep = to_mtu3_ep(ep);
404
405 mep->flags |= MTU3_EP_WEDGE;
406
407 return usb_ep_set_halt(ep);
408}
409
410static const struct usb_ep_ops mtu3_ep_ops = {
411 .enable = mtu3_gadget_ep_enable,
412 .disable = mtu3_gadget_ep_disable,
413 .alloc_request = mtu3_alloc_request,
414 .free_request = mtu3_free_request,
415 .queue = mtu3_gadget_queue,
416 .dequeue = mtu3_gadget_dequeue,
417 .set_halt = mtu3_gadget_ep_set_halt,
418 .set_wedge = mtu3_gadget_ep_set_wedge,
419};
420
421static int mtu3_gadget_get_frame(struct usb_gadget *gadget)
422{
423 struct mtu3 *mtu = gadget_to_mtu3(gadget);
424
425 return (int)mtu3_readl(mtu->mac_base, U3D_USB20_FRAME_NUM);
426}
427
428static int mtu3_gadget_wakeup(struct usb_gadget *gadget)
429{
430 struct mtu3 *mtu = gadget_to_mtu3(gadget);
431 unsigned long flags;
432
433 dev_dbg(mtu->dev, "%s\n", __func__);
434
435 /* remote wakeup feature is not enabled by host */
436 if (!mtu->may_wakeup)
437 return -EOPNOTSUPP;
438
439 spin_lock_irqsave(&mtu->lock, flags);
440 if (mtu->g.speed >= USB_SPEED_SUPER) {
441 mtu3_setbits(mtu->mac_base, U3D_LINK_POWER_CONTROL, UX_EXIT);
442 } else {
443 mtu3_setbits(mtu->mac_base, U3D_POWER_MANAGEMENT, RESUME);
444 spin_unlock_irqrestore(&mtu->lock, flags);
445 usleep_range(10000, 11000);
446 spin_lock_irqsave(&mtu->lock, flags);
447 mtu3_clrbits(mtu->mac_base, U3D_POWER_MANAGEMENT, RESUME);
448 }
449 spin_unlock_irqrestore(&mtu->lock, flags);
450 return 0;
451}
452
453static int mtu3_gadget_set_self_powered(struct usb_gadget *gadget,
454 int is_selfpowered)
455{
456 struct mtu3 *mtu = gadget_to_mtu3(gadget);
457
458 mtu->is_self_powered = !!is_selfpowered;
459 return 0;
460}
461
462static int mtu3_gadget_pullup(struct usb_gadget *gadget, int is_on)
463{
464 struct mtu3 *mtu = gadget_to_mtu3(gadget);
465 unsigned long flags;
466
467 dev_dbg(mtu->dev, "%s (%s) for %sactive device\n", __func__,
468 is_on ? "on" : "off", mtu->is_active ? "" : "in");
469
470 /* we'd rather not pullup unless the device is active. */
471 spin_lock_irqsave(&mtu->lock, flags);
472
473 is_on = !!is_on;
474 if (!mtu->is_active) {
475 /* save it for mtu3_start() to process the request */
476 mtu->softconnect = is_on;
477 } else if (is_on != mtu->softconnect) {
478 mtu->softconnect = is_on;
479 mtu3_dev_on_off(mtu, is_on);
480 }
481
482 spin_unlock_irqrestore(&mtu->lock, flags);
483
484 return 0;
485}
486
487static int mtu3_gadget_start(struct usb_gadget *gadget,
488 struct usb_gadget_driver *driver)
489{
490 struct mtu3 *mtu = gadget_to_mtu3(gadget);
491 unsigned long flags;
492
493 if (mtu->gadget_driver) {
494 dev_err(mtu->dev, "%s is already bound to %s\n",
495 mtu->g.name, mtu->gadget_driver->driver.name);
496 return -EBUSY;
497 }
498
499 dev_dbg(mtu->dev, "bind driver %s\n", driver->function);
500
501 spin_lock_irqsave(&mtu->lock, flags);
502
503 mtu->softconnect = 0;
504 mtu->gadget_driver = driver;
505
506 if (mtu->ssusb->dr_mode == USB_DR_MODE_PERIPHERAL)
507 mtu3_start(mtu);
508
509 spin_unlock_irqrestore(&mtu->lock, flags);
510
511 return 0;
512}
513
514static void stop_activity(struct mtu3 *mtu)
515{
516 struct usb_gadget_driver *driver = mtu->gadget_driver;
517 int i;
518
519 /* don't disconnect if it's not connected */
520 if (mtu->g.speed == USB_SPEED_UNKNOWN)
521 driver = NULL;
522 else
523 mtu->g.speed = USB_SPEED_UNKNOWN;
524
525 /* deactivate the hardware */
526 if (mtu->softconnect) {
527 mtu->softconnect = 0;
528 mtu3_dev_on_off(mtu, 0);
529 }
530
531 /*
532 * killing any outstanding requests will quiesce the driver;
533 * then report disconnect
534 */
535 nuke(mtu->ep0, -ESHUTDOWN);
536 for (i = 1; i < mtu->num_eps; i++) {
537 nuke(mtu->in_eps + i, -ESHUTDOWN);
538 nuke(mtu->out_eps + i, -ESHUTDOWN);
539 }
540
541 if (driver) {
542 spin_unlock(&mtu->lock);
543 driver->disconnect(&mtu->g);
544 spin_lock(&mtu->lock);
545 }
546}
547
548static int mtu3_gadget_stop(struct usb_gadget *g)
549{
550 struct mtu3 *mtu = gadget_to_mtu3(g);
551 unsigned long flags;
552
553 dev_dbg(mtu->dev, "%s\n", __func__);
554
555 spin_lock_irqsave(&mtu->lock, flags);
556
557 stop_activity(mtu);
558 mtu->gadget_driver = NULL;
559
560 if (mtu->ssusb->dr_mode == USB_DR_MODE_PERIPHERAL)
561 mtu3_stop(mtu);
562
563 spin_unlock_irqrestore(&mtu->lock, flags);
564
565 synchronize_irq(mtu->irq);
566 return 0;
567}
568
569static void
570mtu3_gadget_set_speed(struct usb_gadget *g, enum usb_device_speed speed)
571{
572 struct mtu3 *mtu = gadget_to_mtu3(g);
573 unsigned long flags;
574
575 dev_dbg(mtu->dev, "%s %s\n", __func__, usb_speed_string(speed));
576
577 spin_lock_irqsave(&mtu->lock, flags);
578 mtu->speed = speed;
579 spin_unlock_irqrestore(&mtu->lock, flags);
580}
581
582static const struct usb_gadget_ops mtu3_gadget_ops = {
583 .get_frame = mtu3_gadget_get_frame,
584 .wakeup = mtu3_gadget_wakeup,
585 .set_selfpowered = mtu3_gadget_set_self_powered,
586 .pullup = mtu3_gadget_pullup,
587 .udc_start = mtu3_gadget_start,
588 .udc_stop = mtu3_gadget_stop,
589 .udc_set_speed = mtu3_gadget_set_speed,
590};
591
592static void mtu3_state_reset(struct mtu3 *mtu)
593{
594 mtu->address = 0;
595 mtu->ep0_state = MU3D_EP0_STATE_SETUP;
596 mtu->may_wakeup = 0;
597 mtu->u1_enable = 0;
598 mtu->u2_enable = 0;
599 mtu->delayed_status = false;
600 mtu->test_mode = false;
601}
602
603static void init_hw_ep(struct mtu3 *mtu, struct mtu3_ep *mep,
604 u32 epnum, u32 is_in)
605{
606 mep->epnum = epnum;
607 mep->mtu = mtu;
608 mep->is_in = is_in;
609
610 INIT_LIST_HEAD(&mep->req_list);
611
612 sprintf(mep->name, "ep%d%s", epnum,
613 !epnum ? "" : (is_in ? "in" : "out"));
614
615 mep->ep.name = mep->name;
616 INIT_LIST_HEAD(&mep->ep.ep_list);
617
618 /* initialize maxpacket as SS */
619 if (!epnum) {
620 usb_ep_set_maxpacket_limit(&mep->ep, 512);
621 mep->ep.caps.type_control = true;
622 mep->ep.ops = &mtu3_ep0_ops;
623 mtu->g.ep0 = &mep->ep;
624 } else {
625 usb_ep_set_maxpacket_limit(&mep->ep, 1024);
626 mep->ep.caps.type_iso = true;
627 mep->ep.caps.type_bulk = true;
628 mep->ep.caps.type_int = true;
629 mep->ep.ops = &mtu3_ep_ops;
630 list_add_tail(&mep->ep.ep_list, &mtu->g.ep_list);
631 }
632
633 dev_dbg(mtu->dev, "%s, name=%s, maxp=%d\n", __func__, mep->ep.name,
634 mep->ep.maxpacket);
635
636 if (!epnum) {
637 mep->ep.caps.dir_in = true;
638 mep->ep.caps.dir_out = true;
639 } else if (is_in) {
640 mep->ep.caps.dir_in = true;
641 } else {
642 mep->ep.caps.dir_out = true;
643 }
644}
645
646static void mtu3_gadget_init_eps(struct mtu3 *mtu)
647{
648 u8 epnum;
649
650 /* initialize endpoint list just once */
651 INIT_LIST_HEAD(&(mtu->g.ep_list));
652
653 dev_dbg(mtu->dev, "%s num_eps(1 for a pair of tx&rx ep)=%d\n",
654 __func__, mtu->num_eps);
655
656 init_hw_ep(mtu, mtu->ep0, 0, 0);
657 for (epnum = 1; epnum < mtu->num_eps; epnum++) {
658 init_hw_ep(mtu, mtu->in_eps + epnum, epnum, 1);
659 init_hw_ep(mtu, mtu->out_eps + epnum, epnum, 0);
660 }
661}
662
663int mtu3_gadget_setup(struct mtu3 *mtu)
664{
665 mtu->g.ops = &mtu3_gadget_ops;
666 mtu->g.max_speed = mtu->max_speed;
667 mtu->g.speed = USB_SPEED_UNKNOWN;
668 mtu->g.sg_supported = 0;
669 mtu->g.name = MTU3_DRIVER_NAME;
670 mtu->is_active = 0;
671 mtu->delayed_status = false;
672
673 mtu3_gadget_init_eps(mtu);
674
675 return usb_add_gadget_udc(mtu->dev, &mtu->g);
676}
677
678void mtu3_gadget_cleanup(struct mtu3 *mtu)
679{
680 usb_del_gadget_udc(&mtu->g);
681}
682
683void mtu3_gadget_resume(struct mtu3 *mtu)
684{
685 dev_dbg(mtu->dev, "gadget RESUME\n");
686 if (mtu->gadget_driver && mtu->gadget_driver->resume) {
687 spin_unlock(&mtu->lock);
688 mtu->gadget_driver->resume(&mtu->g);
689 spin_lock(&mtu->lock);
690 }
691}
692
693/* called when SOF packets stop for 3+ msec or enters U3 */
694void mtu3_gadget_suspend(struct mtu3 *mtu)
695{
696 dev_dbg(mtu->dev, "gadget SUSPEND\n");
697 if (mtu->gadget_driver && mtu->gadget_driver->suspend) {
698 spin_unlock(&mtu->lock);
699 mtu->gadget_driver->suspend(&mtu->g);
700 spin_lock(&mtu->lock);
701 }
702}
703
704/* called when VBUS drops below session threshold, and in other cases */
705void mtu3_gadget_disconnect(struct mtu3 *mtu)
706{
707 dev_dbg(mtu->dev, "gadget DISCONNECT\n");
708 if (mtu->gadget_driver && mtu->gadget_driver->disconnect) {
709 spin_unlock(&mtu->lock);
710 mtu->gadget_driver->disconnect(&mtu->g);
711 spin_lock(&mtu->lock);
712 }
713
714 mtu3_state_reset(mtu);
715 usb_gadget_set_state(&mtu->g, USB_STATE_NOTATTACHED);
716}
717
718void mtu3_gadget_reset(struct mtu3 *mtu)
719{
720 dev_dbg(mtu->dev, "gadget RESET\n");
721
722 /* report disconnect, if we didn't flush EP state */
723 if (mtu->g.speed != USB_SPEED_UNKNOWN)
724 mtu3_gadget_disconnect(mtu);
725 else
726 mtu3_state_reset(mtu);
727}