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5fd54ace | 1 | // SPDX-License-Identifier: GPL-2.0 |
df2069ac CY |
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 | * This software is licensed under the terms of the GNU General Public | |
10 | * License version 2, as published by the Free Software Foundation, and | |
11 | * may be copied, distributed, and modified under those terms. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | * GNU General Public License for more details. | |
17 | * | |
18 | */ | |
19 | ||
20 | #include "mtu3.h" | |
21 | ||
22 | void mtu3_req_complete(struct mtu3_ep *mep, | |
23 | struct usb_request *req, int status) | |
24 | __releases(mep->mtu->lock) | |
25 | __acquires(mep->mtu->lock) | |
26 | { | |
27 | struct mtu3_request *mreq; | |
28 | struct mtu3 *mtu; | |
29 | int busy = mep->busy; | |
30 | ||
31 | mreq = to_mtu3_request(req); | |
32 | list_del(&mreq->list); | |
33 | if (mreq->request.status == -EINPROGRESS) | |
34 | mreq->request.status = status; | |
35 | ||
36 | mtu = mreq->mtu; | |
37 | mep->busy = 1; | |
38 | spin_unlock(&mtu->lock); | |
39 | ||
40 | /* ep0 makes use of PIO, needn't unmap it */ | |
41 | if (mep->epnum) | |
42 | usb_gadget_unmap_request(&mtu->g, req, mep->is_in); | |
43 | ||
44 | dev_dbg(mtu->dev, "%s complete req: %p, sts %d, %d/%d\n", mep->name, | |
45 | req, req->status, mreq->request.actual, mreq->request.length); | |
46 | ||
47 | usb_gadget_giveback_request(&mep->ep, &mreq->request); | |
48 | ||
49 | spin_lock(&mtu->lock); | |
50 | mep->busy = busy; | |
51 | } | |
52 | ||
53 | static void nuke(struct mtu3_ep *mep, const int status) | |
54 | { | |
55 | struct mtu3_request *mreq = NULL; | |
56 | ||
57 | mep->busy = 1; | |
58 | if (list_empty(&mep->req_list)) | |
59 | return; | |
60 | ||
61 | dev_dbg(mep->mtu->dev, "abort %s's req: sts %d\n", mep->name, status); | |
62 | ||
63 | /* exclude EP0 */ | |
64 | if (mep->epnum) | |
65 | mtu3_qmu_flush(mep); | |
66 | ||
67 | while (!list_empty(&mep->req_list)) { | |
68 | mreq = list_first_entry(&mep->req_list, | |
69 | struct mtu3_request, list); | |
70 | mtu3_req_complete(mep, &mreq->request, status); | |
71 | } | |
72 | } | |
73 | ||
74 | static int mtu3_ep_enable(struct mtu3_ep *mep) | |
75 | { | |
76 | const struct usb_endpoint_descriptor *desc; | |
a29de31b | 77 | const struct usb_ss_ep_comp_descriptor *comp_desc; |
df2069ac CY |
78 | struct mtu3 *mtu = mep->mtu; |
79 | u32 interval = 0; | |
80 | u32 mult = 0; | |
81 | u32 burst = 0; | |
82 | int max_packet; | |
83 | int ret; | |
84 | ||
85 | desc = mep->desc; | |
a29de31b | 86 | comp_desc = mep->comp_desc; |
df2069ac CY |
87 | mep->type = usb_endpoint_type(desc); |
88 | max_packet = usb_endpoint_maxp(desc); | |
89 | mep->maxp = max_packet & GENMASK(10, 0); | |
90 | ||
91 | switch (mtu->g.speed) { | |
a29de31b | 92 | case USB_SPEED_SUPER: |
4d79e042 | 93 | case USB_SPEED_SUPER_PLUS: |
a29de31b CY |
94 | if (usb_endpoint_xfer_int(desc) || |
95 | usb_endpoint_xfer_isoc(desc)) { | |
96 | interval = desc->bInterval; | |
97 | interval = clamp_val(interval, 1, 16) - 1; | |
98 | if (usb_endpoint_xfer_isoc(desc) && comp_desc) | |
99 | mult = comp_desc->bmAttributes; | |
100 | } | |
101 | if (comp_desc) | |
102 | burst = comp_desc->bMaxBurst; | |
103 | ||
104 | break; | |
df2069ac CY |
105 | case USB_SPEED_HIGH: |
106 | if (usb_endpoint_xfer_isoc(desc) || | |
107 | usb_endpoint_xfer_int(desc)) { | |
108 | interval = desc->bInterval; | |
109 | interval = clamp_val(interval, 1, 16) - 1; | |
110 | burst = (max_packet & GENMASK(12, 11)) >> 11; | |
111 | } | |
112 | break; | |
113 | default: | |
114 | break; /*others are ignored */ | |
115 | } | |
116 | ||
117 | dev_dbg(mtu->dev, "%s maxp:%d, interval:%d, burst:%d, mult:%d\n", | |
118 | __func__, mep->maxp, interval, burst, mult); | |
119 | ||
120 | mep->ep.maxpacket = mep->maxp; | |
121 | mep->ep.desc = desc; | |
a29de31b | 122 | mep->ep.comp_desc = comp_desc; |
df2069ac CY |
123 | |
124 | /* slot mainly affects bulk/isoc transfer, so ignore int */ | |
125 | mep->slot = usb_endpoint_xfer_int(desc) ? 0 : mtu->slot; | |
126 | ||
127 | ret = mtu3_config_ep(mtu, mep, interval, burst, mult); | |
128 | if (ret < 0) | |
129 | return ret; | |
130 | ||
131 | ret = mtu3_gpd_ring_alloc(mep); | |
132 | if (ret < 0) { | |
133 | mtu3_deconfig_ep(mtu, mep); | |
134 | return ret; | |
135 | } | |
136 | ||
137 | mtu3_qmu_start(mep); | |
138 | ||
139 | return 0; | |
140 | } | |
141 | ||
142 | static int mtu3_ep_disable(struct mtu3_ep *mep) | |
143 | { | |
144 | struct mtu3 *mtu = mep->mtu; | |
145 | ||
146 | mtu3_qmu_stop(mep); | |
147 | ||
148 | /* abort all pending requests */ | |
149 | nuke(mep, -ESHUTDOWN); | |
150 | mtu3_deconfig_ep(mtu, mep); | |
151 | mtu3_gpd_ring_free(mep); | |
152 | ||
153 | mep->desc = NULL; | |
154 | mep->ep.desc = NULL; | |
a29de31b | 155 | mep->comp_desc = NULL; |
df2069ac CY |
156 | mep->type = 0; |
157 | mep->flags = 0; | |
158 | ||
159 | return 0; | |
160 | } | |
161 | ||
162 | static int mtu3_gadget_ep_enable(struct usb_ep *ep, | |
163 | const struct usb_endpoint_descriptor *desc) | |
164 | { | |
165 | struct mtu3_ep *mep; | |
166 | struct mtu3 *mtu; | |
167 | unsigned long flags; | |
168 | int ret = -EINVAL; | |
169 | ||
170 | if (!ep || !desc || desc->bDescriptorType != USB_DT_ENDPOINT) { | |
171 | pr_debug("%s invalid parameters\n", __func__); | |
172 | return -EINVAL; | |
173 | } | |
174 | ||
175 | if (!desc->wMaxPacketSize) { | |
176 | pr_debug("%s missing wMaxPacketSize\n", __func__); | |
177 | return -EINVAL; | |
178 | } | |
179 | mep = to_mtu3_ep(ep); | |
180 | mtu = mep->mtu; | |
181 | ||
182 | /* check ep number and direction against endpoint */ | |
183 | if (usb_endpoint_num(desc) != mep->epnum) | |
184 | return -EINVAL; | |
185 | ||
186 | if (!!usb_endpoint_dir_in(desc) ^ !!mep->is_in) | |
187 | return -EINVAL; | |
188 | ||
189 | dev_dbg(mtu->dev, "%s %s\n", __func__, ep->name); | |
190 | ||
191 | if (mep->flags & MTU3_EP_ENABLED) { | |
192 | dev_WARN_ONCE(mtu->dev, true, "%s is already enabled\n", | |
193 | mep->name); | |
194 | return 0; | |
195 | } | |
196 | ||
197 | spin_lock_irqsave(&mtu->lock, flags); | |
198 | mep->desc = desc; | |
a29de31b | 199 | mep->comp_desc = ep->comp_desc; |
df2069ac CY |
200 | |
201 | ret = mtu3_ep_enable(mep); | |
202 | if (ret) | |
203 | goto error; | |
204 | ||
205 | mep->busy = 0; | |
206 | mep->wedged = 0; | |
207 | mep->flags |= MTU3_EP_ENABLED; | |
208 | mtu->active_ep++; | |
209 | ||
210 | error: | |
211 | spin_unlock_irqrestore(&mtu->lock, flags); | |
212 | ||
213 | dev_dbg(mtu->dev, "%s active_ep=%d\n", __func__, mtu->active_ep); | |
214 | ||
215 | return ret; | |
216 | } | |
217 | ||
218 | static int mtu3_gadget_ep_disable(struct usb_ep *ep) | |
219 | { | |
220 | struct mtu3_ep *mep = to_mtu3_ep(ep); | |
221 | struct mtu3 *mtu = mep->mtu; | |
222 | unsigned long flags; | |
223 | ||
224 | dev_dbg(mtu->dev, "%s %s\n", __func__, mep->name); | |
225 | ||
226 | if (!(mep->flags & MTU3_EP_ENABLED)) { | |
227 | dev_warn(mtu->dev, "%s is already disabled\n", mep->name); | |
228 | return 0; | |
229 | } | |
230 | ||
231 | spin_lock_irqsave(&mtu->lock, flags); | |
232 | mtu3_ep_disable(mep); | |
233 | mep->flags &= ~MTU3_EP_ENABLED; | |
234 | mtu->active_ep--; | |
235 | spin_unlock_irqrestore(&(mtu->lock), flags); | |
236 | ||
237 | dev_dbg(mtu->dev, "%s active_ep=%d, mtu3 is_active=%d\n", | |
238 | __func__, mtu->active_ep, mtu->is_active); | |
239 | ||
240 | return 0; | |
241 | } | |
242 | ||
243 | struct usb_request *mtu3_alloc_request(struct usb_ep *ep, gfp_t gfp_flags) | |
244 | { | |
245 | struct mtu3_ep *mep = to_mtu3_ep(ep); | |
246 | struct mtu3_request *mreq; | |
247 | ||
248 | mreq = kzalloc(sizeof(*mreq), gfp_flags); | |
249 | if (!mreq) | |
250 | return NULL; | |
251 | ||
252 | mreq->request.dma = DMA_ADDR_INVALID; | |
253 | mreq->epnum = mep->epnum; | |
254 | mreq->mep = mep; | |
255 | ||
256 | return &mreq->request; | |
257 | } | |
258 | ||
259 | void mtu3_free_request(struct usb_ep *ep, struct usb_request *req) | |
260 | { | |
261 | kfree(to_mtu3_request(req)); | |
262 | } | |
263 | ||
264 | static int mtu3_gadget_queue(struct usb_ep *ep, | |
265 | struct usb_request *req, gfp_t gfp_flags) | |
266 | { | |
267 | struct mtu3_ep *mep; | |
268 | struct mtu3_request *mreq; | |
269 | struct mtu3 *mtu; | |
270 | unsigned long flags; | |
271 | int ret = 0; | |
272 | ||
273 | if (!ep || !req) | |
274 | return -EINVAL; | |
275 | ||
276 | if (!req->buf) | |
277 | return -ENODATA; | |
278 | ||
279 | mep = to_mtu3_ep(ep); | |
280 | mtu = mep->mtu; | |
281 | mreq = to_mtu3_request(req); | |
282 | mreq->mtu = mtu; | |
283 | ||
284 | if (mreq->mep != mep) | |
285 | return -EINVAL; | |
286 | ||
287 | dev_dbg(mtu->dev, "%s %s EP%d(%s), req=%p, maxp=%d, len#%d\n", | |
288 | __func__, mep->is_in ? "TX" : "RX", mreq->epnum, ep->name, | |
289 | mreq, ep->maxpacket, mreq->request.length); | |
290 | ||
291 | if (req->length > GPD_BUF_SIZE) { | |
292 | dev_warn(mtu->dev, | |
293 | "req length > supported MAX:%d requested:%d\n", | |
294 | GPD_BUF_SIZE, req->length); | |
295 | return -EOPNOTSUPP; | |
296 | } | |
297 | ||
298 | /* don't queue if the ep is down */ | |
299 | if (!mep->desc) { | |
300 | dev_dbg(mtu->dev, "req=%p queued to %s while it's disabled\n", | |
301 | req, ep->name); | |
302 | return -ESHUTDOWN; | |
303 | } | |
304 | ||
305 | mreq->request.actual = 0; | |
306 | mreq->request.status = -EINPROGRESS; | |
307 | ||
308 | ret = usb_gadget_map_request(&mtu->g, req, mep->is_in); | |
309 | if (ret) { | |
310 | dev_err(mtu->dev, "dma mapping failed\n"); | |
311 | return ret; | |
312 | } | |
313 | ||
314 | spin_lock_irqsave(&mtu->lock, flags); | |
315 | ||
316 | if (mtu3_prepare_transfer(mep)) { | |
317 | ret = -EAGAIN; | |
318 | goto error; | |
319 | } | |
320 | ||
321 | list_add_tail(&mreq->list, &mep->req_list); | |
322 | mtu3_insert_gpd(mep, mreq); | |
323 | mtu3_qmu_resume(mep); | |
324 | ||
325 | error: | |
326 | spin_unlock_irqrestore(&mtu->lock, flags); | |
327 | ||
328 | return ret; | |
329 | } | |
330 | ||
331 | static int mtu3_gadget_dequeue(struct usb_ep *ep, struct usb_request *req) | |
332 | { | |
333 | struct mtu3_ep *mep = to_mtu3_ep(ep); | |
334 | struct mtu3_request *mreq = to_mtu3_request(req); | |
335 | struct mtu3_request *r; | |
336 | unsigned long flags; | |
337 | int ret = 0; | |
338 | struct mtu3 *mtu = mep->mtu; | |
339 | ||
340 | if (!ep || !req || mreq->mep != mep) | |
341 | return -EINVAL; | |
342 | ||
343 | dev_dbg(mtu->dev, "%s : req=%p\n", __func__, req); | |
344 | ||
345 | spin_lock_irqsave(&mtu->lock, flags); | |
346 | ||
347 | list_for_each_entry(r, &mep->req_list, list) { | |
348 | if (r == mreq) | |
349 | break; | |
350 | } | |
351 | if (r != mreq) { | |
352 | dev_dbg(mtu->dev, "req=%p not queued to %s\n", req, ep->name); | |
353 | ret = -EINVAL; | |
354 | goto done; | |
355 | } | |
356 | ||
357 | mtu3_qmu_flush(mep); /* REVISIT: set BPS ?? */ | |
358 | mtu3_req_complete(mep, req, -ECONNRESET); | |
359 | mtu3_qmu_start(mep); | |
360 | ||
361 | done: | |
362 | spin_unlock_irqrestore(&mtu->lock, flags); | |
363 | ||
364 | return ret; | |
365 | } | |
366 | ||
367 | /* | |
368 | * Set or clear the halt bit of an EP. | |
369 | * A halted EP won't TX/RX any data but will queue requests. | |
370 | */ | |
371 | static int mtu3_gadget_ep_set_halt(struct usb_ep *ep, int value) | |
372 | { | |
373 | struct mtu3_ep *mep = to_mtu3_ep(ep); | |
374 | struct mtu3 *mtu = mep->mtu; | |
375 | struct mtu3_request *mreq; | |
376 | unsigned long flags; | |
377 | int ret = 0; | |
378 | ||
379 | if (!ep) | |
380 | return -EINVAL; | |
381 | ||
382 | dev_dbg(mtu->dev, "%s : %s...", __func__, ep->name); | |
383 | ||
384 | spin_lock_irqsave(&mtu->lock, flags); | |
385 | ||
386 | if (mep->type == USB_ENDPOINT_XFER_ISOC) { | |
387 | ret = -EINVAL; | |
388 | goto done; | |
389 | } | |
390 | ||
391 | mreq = next_request(mep); | |
392 | if (value) { | |
393 | /* | |
394 | * If there is not request for TX-EP, QMU will not transfer | |
395 | * data to TX-FIFO, so no need check whether TX-FIFO | |
396 | * holds bytes or not here | |
397 | */ | |
398 | if (mreq) { | |
399 | dev_dbg(mtu->dev, "req in progress, cannot halt %s\n", | |
400 | ep->name); | |
401 | ret = -EAGAIN; | |
402 | goto done; | |
403 | } | |
404 | } else { | |
405 | mep->wedged = 0; | |
406 | } | |
407 | ||
408 | dev_dbg(mtu->dev, "%s %s stall\n", ep->name, value ? "set" : "clear"); | |
409 | ||
410 | mtu3_ep_stall_set(mep, value); | |
411 | ||
412 | done: | |
413 | spin_unlock_irqrestore(&mtu->lock, flags); | |
414 | ||
415 | return ret; | |
416 | } | |
417 | ||
418 | /* Sets the halt feature with the clear requests ignored */ | |
419 | static int mtu3_gadget_ep_set_wedge(struct usb_ep *ep) | |
420 | { | |
421 | struct mtu3_ep *mep = to_mtu3_ep(ep); | |
422 | ||
423 | if (!ep) | |
424 | return -EINVAL; | |
425 | ||
426 | mep->wedged = 1; | |
427 | ||
428 | return usb_ep_set_halt(ep); | |
429 | } | |
430 | ||
431 | static const struct usb_ep_ops mtu3_ep_ops = { | |
432 | .enable = mtu3_gadget_ep_enable, | |
433 | .disable = mtu3_gadget_ep_disable, | |
434 | .alloc_request = mtu3_alloc_request, | |
435 | .free_request = mtu3_free_request, | |
436 | .queue = mtu3_gadget_queue, | |
437 | .dequeue = mtu3_gadget_dequeue, | |
438 | .set_halt = mtu3_gadget_ep_set_halt, | |
439 | .set_wedge = mtu3_gadget_ep_set_wedge, | |
440 | }; | |
441 | ||
442 | static int mtu3_gadget_get_frame(struct usb_gadget *gadget) | |
443 | { | |
444 | struct mtu3 *mtu = gadget_to_mtu3(gadget); | |
445 | ||
446 | return (int)mtu3_readl(mtu->mac_base, U3D_USB20_FRAME_NUM); | |
447 | } | |
448 | ||
449 | static int mtu3_gadget_wakeup(struct usb_gadget *gadget) | |
450 | { | |
451 | struct mtu3 *mtu = gadget_to_mtu3(gadget); | |
452 | unsigned long flags; | |
453 | ||
454 | dev_dbg(mtu->dev, "%s\n", __func__); | |
455 | ||
456 | /* remote wakeup feature is not enabled by host */ | |
457 | if (!mtu->may_wakeup) | |
458 | return -EOPNOTSUPP; | |
459 | ||
460 | spin_lock_irqsave(&mtu->lock, flags); | |
4d79e042 | 461 | if (mtu->g.speed >= USB_SPEED_SUPER) { |
a29de31b CY |
462 | mtu3_setbits(mtu->mac_base, U3D_LINK_POWER_CONTROL, UX_EXIT); |
463 | } else { | |
464 | mtu3_setbits(mtu->mac_base, U3D_POWER_MANAGEMENT, RESUME); | |
465 | spin_unlock_irqrestore(&mtu->lock, flags); | |
466 | usleep_range(10000, 11000); | |
467 | spin_lock_irqsave(&mtu->lock, flags); | |
468 | mtu3_clrbits(mtu->mac_base, U3D_POWER_MANAGEMENT, RESUME); | |
469 | } | |
df2069ac CY |
470 | spin_unlock_irqrestore(&mtu->lock, flags); |
471 | return 0; | |
472 | } | |
473 | ||
474 | static int mtu3_gadget_set_self_powered(struct usb_gadget *gadget, | |
475 | int is_selfpowered) | |
476 | { | |
477 | struct mtu3 *mtu = gadget_to_mtu3(gadget); | |
478 | ||
479 | mtu->is_self_powered = !!is_selfpowered; | |
480 | return 0; | |
481 | } | |
482 | ||
483 | static int mtu3_gadget_pullup(struct usb_gadget *gadget, int is_on) | |
484 | { | |
485 | struct mtu3 *mtu = gadget_to_mtu3(gadget); | |
486 | unsigned long flags; | |
487 | ||
488 | dev_dbg(mtu->dev, "%s (%s) for %sactive device\n", __func__, | |
489 | is_on ? "on" : "off", mtu->is_active ? "" : "in"); | |
490 | ||
491 | /* we'd rather not pullup unless the device is active. */ | |
492 | spin_lock_irqsave(&mtu->lock, flags); | |
493 | ||
494 | is_on = !!is_on; | |
495 | if (!mtu->is_active) { | |
496 | /* save it for mtu3_start() to process the request */ | |
497 | mtu->softconnect = is_on; | |
498 | } else if (is_on != mtu->softconnect) { | |
499 | mtu->softconnect = is_on; | |
a29de31b | 500 | mtu3_dev_on_off(mtu, is_on); |
df2069ac CY |
501 | } |
502 | ||
503 | spin_unlock_irqrestore(&mtu->lock, flags); | |
504 | ||
505 | return 0; | |
506 | } | |
507 | ||
508 | static int mtu3_gadget_start(struct usb_gadget *gadget, | |
509 | struct usb_gadget_driver *driver) | |
510 | { | |
511 | struct mtu3 *mtu = gadget_to_mtu3(gadget); | |
512 | unsigned long flags; | |
513 | ||
514 | if (mtu->gadget_driver) { | |
515 | dev_err(mtu->dev, "%s is already bound to %s\n", | |
516 | mtu->g.name, mtu->gadget_driver->driver.name); | |
517 | return -EBUSY; | |
518 | } | |
519 | ||
520 | dev_dbg(mtu->dev, "bind driver %s\n", driver->function); | |
521 | ||
522 | spin_lock_irqsave(&mtu->lock, flags); | |
523 | ||
524 | mtu->softconnect = 0; | |
525 | mtu->gadget_driver = driver; | |
526 | ||
d0ed062a CY |
527 | if (mtu->ssusb->dr_mode == USB_DR_MODE_PERIPHERAL) |
528 | mtu3_start(mtu); | |
df2069ac CY |
529 | |
530 | spin_unlock_irqrestore(&mtu->lock, flags); | |
531 | ||
532 | return 0; | |
533 | } | |
534 | ||
535 | static void stop_activity(struct mtu3 *mtu) | |
536 | { | |
537 | struct usb_gadget_driver *driver = mtu->gadget_driver; | |
538 | int i; | |
539 | ||
540 | /* don't disconnect if it's not connected */ | |
541 | if (mtu->g.speed == USB_SPEED_UNKNOWN) | |
542 | driver = NULL; | |
543 | else | |
544 | mtu->g.speed = USB_SPEED_UNKNOWN; | |
545 | ||
546 | /* deactivate the hardware */ | |
547 | if (mtu->softconnect) { | |
548 | mtu->softconnect = 0; | |
a29de31b | 549 | mtu3_dev_on_off(mtu, 0); |
df2069ac CY |
550 | } |
551 | ||
552 | /* | |
553 | * killing any outstanding requests will quiesce the driver; | |
554 | * then report disconnect | |
555 | */ | |
556 | nuke(mtu->ep0, -ESHUTDOWN); | |
557 | for (i = 1; i < mtu->num_eps; i++) { | |
558 | nuke(mtu->in_eps + i, -ESHUTDOWN); | |
559 | nuke(mtu->out_eps + i, -ESHUTDOWN); | |
560 | } | |
561 | ||
562 | if (driver) { | |
563 | spin_unlock(&mtu->lock); | |
564 | driver->disconnect(&mtu->g); | |
565 | spin_lock(&mtu->lock); | |
566 | } | |
567 | } | |
568 | ||
569 | static int mtu3_gadget_stop(struct usb_gadget *g) | |
570 | { | |
571 | struct mtu3 *mtu = gadget_to_mtu3(g); | |
572 | unsigned long flags; | |
573 | ||
574 | dev_dbg(mtu->dev, "%s\n", __func__); | |
575 | ||
576 | spin_lock_irqsave(&mtu->lock, flags); | |
577 | ||
578 | stop_activity(mtu); | |
579 | mtu->gadget_driver = NULL; | |
580 | ||
d0ed062a CY |
581 | if (mtu->ssusb->dr_mode == USB_DR_MODE_PERIPHERAL) |
582 | mtu3_stop(mtu); | |
df2069ac CY |
583 | |
584 | spin_unlock_irqrestore(&mtu->lock, flags); | |
585 | ||
586 | return 0; | |
587 | } | |
588 | ||
589 | static const struct usb_gadget_ops mtu3_gadget_ops = { | |
590 | .get_frame = mtu3_gadget_get_frame, | |
591 | .wakeup = mtu3_gadget_wakeup, | |
592 | .set_selfpowered = mtu3_gadget_set_self_powered, | |
593 | .pullup = mtu3_gadget_pullup, | |
594 | .udc_start = mtu3_gadget_start, | |
595 | .udc_stop = mtu3_gadget_stop, | |
596 | }; | |
597 | ||
598 | static void init_hw_ep(struct mtu3 *mtu, struct mtu3_ep *mep, | |
599 | u32 epnum, u32 is_in) | |
600 | { | |
601 | mep->epnum = epnum; | |
602 | mep->mtu = mtu; | |
603 | mep->is_in = is_in; | |
604 | ||
605 | INIT_LIST_HEAD(&mep->req_list); | |
606 | ||
607 | sprintf(mep->name, "ep%d%s", epnum, | |
608 | !epnum ? "" : (is_in ? "in" : "out")); | |
609 | ||
610 | mep->ep.name = mep->name; | |
611 | INIT_LIST_HEAD(&mep->ep.ep_list); | |
612 | ||
a29de31b | 613 | /* initialize maxpacket as SS */ |
df2069ac | 614 | if (!epnum) { |
a29de31b | 615 | usb_ep_set_maxpacket_limit(&mep->ep, 512); |
df2069ac CY |
616 | mep->ep.caps.type_control = true; |
617 | mep->ep.ops = &mtu3_ep0_ops; | |
618 | mtu->g.ep0 = &mep->ep; | |
619 | } else { | |
a29de31b | 620 | usb_ep_set_maxpacket_limit(&mep->ep, 1024); |
df2069ac CY |
621 | mep->ep.caps.type_iso = true; |
622 | mep->ep.caps.type_bulk = true; | |
623 | mep->ep.caps.type_int = true; | |
624 | mep->ep.ops = &mtu3_ep_ops; | |
625 | list_add_tail(&mep->ep.ep_list, &mtu->g.ep_list); | |
626 | } | |
627 | ||
628 | dev_dbg(mtu->dev, "%s, name=%s, maxp=%d\n", __func__, mep->ep.name, | |
629 | mep->ep.maxpacket); | |
630 | ||
631 | if (!epnum) { | |
632 | mep->ep.caps.dir_in = true; | |
633 | mep->ep.caps.dir_out = true; | |
634 | } else if (is_in) { | |
635 | mep->ep.caps.dir_in = true; | |
636 | } else { | |
637 | mep->ep.caps.dir_out = true; | |
638 | } | |
639 | } | |
640 | ||
641 | static void mtu3_gadget_init_eps(struct mtu3 *mtu) | |
642 | { | |
643 | u8 epnum; | |
644 | ||
645 | /* initialize endpoint list just once */ | |
646 | INIT_LIST_HEAD(&(mtu->g.ep_list)); | |
647 | ||
648 | dev_dbg(mtu->dev, "%s num_eps(1 for a pair of tx&rx ep)=%d\n", | |
649 | __func__, mtu->num_eps); | |
650 | ||
651 | init_hw_ep(mtu, mtu->ep0, 0, 0); | |
652 | for (epnum = 1; epnum < mtu->num_eps; epnum++) { | |
653 | init_hw_ep(mtu, mtu->in_eps + epnum, epnum, 1); | |
654 | init_hw_ep(mtu, mtu->out_eps + epnum, epnum, 0); | |
655 | } | |
656 | } | |
657 | ||
658 | int mtu3_gadget_setup(struct mtu3 *mtu) | |
659 | { | |
660 | int ret; | |
661 | ||
662 | mtu->g.ops = &mtu3_gadget_ops; | |
a29de31b | 663 | mtu->g.max_speed = mtu->max_speed; |
df2069ac CY |
664 | mtu->g.speed = USB_SPEED_UNKNOWN; |
665 | mtu->g.sg_supported = 0; | |
666 | mtu->g.name = MTU3_DRIVER_NAME; | |
667 | mtu->is_active = 0; | |
fe7c994a | 668 | mtu->delayed_status = false; |
df2069ac CY |
669 | |
670 | mtu3_gadget_init_eps(mtu); | |
671 | ||
672 | ret = usb_add_gadget_udc(mtu->dev, &mtu->g); | |
673 | if (ret) { | |
674 | dev_err(mtu->dev, "failed to register udc\n"); | |
675 | return ret; | |
676 | } | |
677 | ||
678 | usb_gadget_set_state(&mtu->g, USB_STATE_NOTATTACHED); | |
679 | ||
680 | return 0; | |
681 | } | |
682 | ||
683 | void mtu3_gadget_cleanup(struct mtu3 *mtu) | |
684 | { | |
685 | usb_del_gadget_udc(&mtu->g); | |
686 | } | |
687 | ||
688 | void mtu3_gadget_resume(struct mtu3 *mtu) | |
689 | { | |
690 | dev_dbg(mtu->dev, "gadget RESUME\n"); | |
691 | if (mtu->gadget_driver && mtu->gadget_driver->resume) { | |
692 | spin_unlock(&mtu->lock); | |
693 | mtu->gadget_driver->resume(&mtu->g); | |
694 | spin_lock(&mtu->lock); | |
695 | } | |
696 | } | |
697 | ||
698 | /* called when SOF packets stop for 3+ msec or enters U3 */ | |
699 | void mtu3_gadget_suspend(struct mtu3 *mtu) | |
700 | { | |
701 | dev_dbg(mtu->dev, "gadget SUSPEND\n"); | |
702 | if (mtu->gadget_driver && mtu->gadget_driver->suspend) { | |
703 | spin_unlock(&mtu->lock); | |
704 | mtu->gadget_driver->suspend(&mtu->g); | |
705 | spin_lock(&mtu->lock); | |
706 | } | |
707 | } | |
708 | ||
709 | /* called when VBUS drops below session threshold, and in other cases */ | |
710 | void mtu3_gadget_disconnect(struct mtu3 *mtu) | |
711 | { | |
712 | dev_dbg(mtu->dev, "gadget DISCONNECT\n"); | |
713 | if (mtu->gadget_driver && mtu->gadget_driver->disconnect) { | |
714 | spin_unlock(&mtu->lock); | |
715 | mtu->gadget_driver->disconnect(&mtu->g); | |
716 | spin_lock(&mtu->lock); | |
717 | } | |
718 | ||
719 | usb_gadget_set_state(&mtu->g, USB_STATE_NOTATTACHED); | |
720 | } | |
721 | ||
722 | void mtu3_gadget_reset(struct mtu3 *mtu) | |
723 | { | |
724 | dev_dbg(mtu->dev, "gadget RESET\n"); | |
725 | ||
726 | /* report disconnect, if we didn't flush EP state */ | |
727 | if (mtu->g.speed != USB_SPEED_UNKNOWN) | |
728 | mtu3_gadget_disconnect(mtu); | |
729 | ||
730 | mtu->address = 0; | |
731 | mtu->ep0_state = MU3D_EP0_STATE_SETUP; | |
732 | mtu->may_wakeup = 0; | |
14a4caa0 CY |
733 | mtu->u1_enable = 0; |
734 | mtu->u2_enable = 0; | |
fe7c994a | 735 | mtu->delayed_status = false; |
df2069ac | 736 | } |