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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> | |
df2069ac CY |
8 | */ |
9 | ||
10 | #include "mtu3.h" | |
83374e03 | 11 | #include "mtu3_trace.h" |
df2069ac CY |
12 | |
13 | void 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; | |
19 | struct mtu3 *mtu; | |
20 | int busy = mep->busy; | |
21 | ||
22 | mreq = to_mtu3_request(req); | |
23 | list_del(&mreq->list); | |
24 | if (mreq->request.status == -EINPROGRESS) | |
25 | mreq->request.status = status; | |
26 | ||
27 | mtu = mreq->mtu; | |
28 | mep->busy = 1; | |
83374e03 CY |
29 | |
30 | trace_mtu3_req_complete(mreq); | |
df2069ac CY |
31 | spin_unlock(&mtu->lock); |
32 | ||
33 | /* ep0 makes use of PIO, needn't unmap it */ | |
34 | if (mep->epnum) | |
35 | usb_gadget_unmap_request(&mtu->g, req, mep->is_in); | |
36 | ||
37 | dev_dbg(mtu->dev, "%s complete req: %p, sts %d, %d/%d\n", mep->name, | |
38 | req, req->status, mreq->request.actual, mreq->request.length); | |
39 | ||
40 | usb_gadget_giveback_request(&mep->ep, &mreq->request); | |
41 | ||
42 | spin_lock(&mtu->lock); | |
43 | mep->busy = busy; | |
44 | } | |
45 | ||
46 | static void nuke(struct mtu3_ep *mep, const int status) | |
47 | { | |
48 | struct mtu3_request *mreq = NULL; | |
49 | ||
50 | mep->busy = 1; | |
51 | if (list_empty(&mep->req_list)) | |
52 | return; | |
53 | ||
54 | dev_dbg(mep->mtu->dev, "abort %s's req: sts %d\n", mep->name, status); | |
55 | ||
56 | /* exclude EP0 */ | |
57 | if (mep->epnum) | |
58 | mtu3_qmu_flush(mep); | |
59 | ||
60 | while (!list_empty(&mep->req_list)) { | |
61 | mreq = list_first_entry(&mep->req_list, | |
62 | struct mtu3_request, list); | |
63 | mtu3_req_complete(mep, &mreq->request, status); | |
64 | } | |
65 | } | |
66 | ||
67 | static int mtu3_ep_enable(struct mtu3_ep *mep) | |
68 | { | |
69 | const struct usb_endpoint_descriptor *desc; | |
a29de31b | 70 | const struct usb_ss_ep_comp_descriptor *comp_desc; |
df2069ac CY |
71 | struct mtu3 *mtu = mep->mtu; |
72 | u32 interval = 0; | |
73 | u32 mult = 0; | |
74 | u32 burst = 0; | |
75 | int max_packet; | |
76 | int ret; | |
77 | ||
78 | desc = mep->desc; | |
a29de31b | 79 | comp_desc = mep->comp_desc; |
df2069ac CY |
80 | mep->type = usb_endpoint_type(desc); |
81 | max_packet = usb_endpoint_maxp(desc); | |
82 | mep->maxp = max_packet & GENMASK(10, 0); | |
83 | ||
84 | switch (mtu->g.speed) { | |
a29de31b | 85 | case USB_SPEED_SUPER: |
4d79e042 | 86 | case USB_SPEED_SUPER_PLUS: |
a29de31b CY |
87 | if (usb_endpoint_xfer_int(desc) || |
88 | usb_endpoint_xfer_isoc(desc)) { | |
89 | interval = desc->bInterval; | |
90 | interval = clamp_val(interval, 1, 16) - 1; | |
91 | if (usb_endpoint_xfer_isoc(desc) && comp_desc) | |
92 | mult = comp_desc->bmAttributes; | |
93 | } | |
94 | if (comp_desc) | |
95 | burst = comp_desc->bMaxBurst; | |
96 | ||
97 | break; | |
df2069ac CY |
98 | case USB_SPEED_HIGH: |
99 | if (usb_endpoint_xfer_isoc(desc) || | |
100 | usb_endpoint_xfer_int(desc)) { | |
101 | interval = desc->bInterval; | |
102 | interval = clamp_val(interval, 1, 16) - 1; | |
103 | burst = (max_packet & GENMASK(12, 11)) >> 11; | |
104 | } | |
105 | break; | |
106 | default: | |
107 | break; /*others are ignored */ | |
108 | } | |
109 | ||
110 | dev_dbg(mtu->dev, "%s maxp:%d, interval:%d, burst:%d, mult:%d\n", | |
111 | __func__, mep->maxp, interval, burst, mult); | |
112 | ||
113 | mep->ep.maxpacket = mep->maxp; | |
114 | mep->ep.desc = desc; | |
a29de31b | 115 | mep->ep.comp_desc = comp_desc; |
df2069ac CY |
116 | |
117 | /* slot mainly affects bulk/isoc transfer, so ignore int */ | |
118 | mep->slot = usb_endpoint_xfer_int(desc) ? 0 : mtu->slot; | |
119 | ||
120 | ret = mtu3_config_ep(mtu, mep, interval, burst, mult); | |
121 | if (ret < 0) | |
122 | return ret; | |
123 | ||
124 | ret = mtu3_gpd_ring_alloc(mep); | |
125 | if (ret < 0) { | |
126 | mtu3_deconfig_ep(mtu, mep); | |
127 | return ret; | |
128 | } | |
129 | ||
130 | mtu3_qmu_start(mep); | |
131 | ||
132 | return 0; | |
133 | } | |
134 | ||
135 | static int mtu3_ep_disable(struct mtu3_ep *mep) | |
136 | { | |
137 | struct mtu3 *mtu = mep->mtu; | |
138 | ||
139 | mtu3_qmu_stop(mep); | |
140 | ||
141 | /* abort all pending requests */ | |
142 | nuke(mep, -ESHUTDOWN); | |
143 | mtu3_deconfig_ep(mtu, mep); | |
144 | mtu3_gpd_ring_free(mep); | |
145 | ||
146 | mep->desc = NULL; | |
147 | mep->ep.desc = NULL; | |
a29de31b | 148 | mep->comp_desc = NULL; |
df2069ac CY |
149 | mep->type = 0; |
150 | mep->flags = 0; | |
151 | ||
152 | return 0; | |
153 | } | |
154 | ||
155 | static int mtu3_gadget_ep_enable(struct usb_ep *ep, | |
156 | const struct usb_endpoint_descriptor *desc) | |
157 | { | |
158 | struct mtu3_ep *mep; | |
159 | struct mtu3 *mtu; | |
160 | unsigned long flags; | |
161 | int ret = -EINVAL; | |
162 | ||
163 | if (!ep || !desc || desc->bDescriptorType != USB_DT_ENDPOINT) { | |
164 | pr_debug("%s invalid parameters\n", __func__); | |
165 | return -EINVAL; | |
166 | } | |
167 | ||
168 | if (!desc->wMaxPacketSize) { | |
169 | pr_debug("%s missing wMaxPacketSize\n", __func__); | |
170 | return -EINVAL; | |
171 | } | |
172 | mep = to_mtu3_ep(ep); | |
173 | mtu = mep->mtu; | |
174 | ||
175 | /* check ep number and direction against endpoint */ | |
176 | if (usb_endpoint_num(desc) != mep->epnum) | |
177 | return -EINVAL; | |
178 | ||
179 | if (!!usb_endpoint_dir_in(desc) ^ !!mep->is_in) | |
180 | return -EINVAL; | |
181 | ||
182 | dev_dbg(mtu->dev, "%s %s\n", __func__, ep->name); | |
183 | ||
184 | if (mep->flags & MTU3_EP_ENABLED) { | |
185 | dev_WARN_ONCE(mtu->dev, true, "%s is already enabled\n", | |
186 | mep->name); | |
187 | return 0; | |
188 | } | |
189 | ||
190 | spin_lock_irqsave(&mtu->lock, flags); | |
191 | mep->desc = desc; | |
a29de31b | 192 | mep->comp_desc = ep->comp_desc; |
df2069ac CY |
193 | |
194 | ret = mtu3_ep_enable(mep); | |
195 | if (ret) | |
196 | goto error; | |
197 | ||
198 | mep->busy = 0; | |
199 | mep->wedged = 0; | |
200 | mep->flags |= MTU3_EP_ENABLED; | |
201 | mtu->active_ep++; | |
202 | ||
203 | error: | |
204 | spin_unlock_irqrestore(&mtu->lock, flags); | |
205 | ||
206 | dev_dbg(mtu->dev, "%s active_ep=%d\n", __func__, mtu->active_ep); | |
83374e03 | 207 | trace_mtu3_gadget_ep_enable(mep); |
df2069ac CY |
208 | |
209 | return ret; | |
210 | } | |
211 | ||
212 | static int mtu3_gadget_ep_disable(struct usb_ep *ep) | |
213 | { | |
214 | struct mtu3_ep *mep = to_mtu3_ep(ep); | |
215 | struct mtu3 *mtu = mep->mtu; | |
216 | unsigned long flags; | |
217 | ||
218 | dev_dbg(mtu->dev, "%s %s\n", __func__, mep->name); | |
83374e03 | 219 | trace_mtu3_gadget_ep_disable(mep); |
df2069ac CY |
220 | |
221 | if (!(mep->flags & MTU3_EP_ENABLED)) { | |
222 | dev_warn(mtu->dev, "%s is already disabled\n", mep->name); | |
223 | return 0; | |
224 | } | |
225 | ||
226 | spin_lock_irqsave(&mtu->lock, flags); | |
227 | mtu3_ep_disable(mep); | |
228 | mep->flags &= ~MTU3_EP_ENABLED; | |
229 | mtu->active_ep--; | |
230 | spin_unlock_irqrestore(&(mtu->lock), flags); | |
231 | ||
232 | dev_dbg(mtu->dev, "%s active_ep=%d, mtu3 is_active=%d\n", | |
233 | __func__, mtu->active_ep, mtu->is_active); | |
234 | ||
235 | return 0; | |
236 | } | |
237 | ||
238 | struct usb_request *mtu3_alloc_request(struct usb_ep *ep, gfp_t gfp_flags) | |
239 | { | |
240 | struct mtu3_ep *mep = to_mtu3_ep(ep); | |
241 | struct mtu3_request *mreq; | |
242 | ||
243 | mreq = kzalloc(sizeof(*mreq), gfp_flags); | |
244 | if (!mreq) | |
245 | return NULL; | |
246 | ||
247 | mreq->request.dma = DMA_ADDR_INVALID; | |
248 | mreq->epnum = mep->epnum; | |
249 | mreq->mep = mep; | |
83374e03 | 250 | trace_mtu3_alloc_request(mreq); |
df2069ac CY |
251 | |
252 | return &mreq->request; | |
253 | } | |
254 | ||
255 | void mtu3_free_request(struct usb_ep *ep, struct usb_request *req) | |
256 | { | |
83374e03 CY |
257 | struct mtu3_request *mreq = to_mtu3_request(req); |
258 | ||
259 | trace_mtu3_free_request(mreq); | |
260 | kfree(mreq); | |
df2069ac CY |
261 | } |
262 | ||
263 | static int mtu3_gadget_queue(struct usb_ep *ep, | |
264 | struct usb_request *req, gfp_t gfp_flags) | |
265 | { | |
266 | struct mtu3_ep *mep; | |
267 | struct mtu3_request *mreq; | |
268 | struct mtu3 *mtu; | |
269 | unsigned long flags; | |
270 | int ret = 0; | |
271 | ||
272 | if (!ep || !req) | |
273 | return -EINVAL; | |
274 | ||
275 | if (!req->buf) | |
276 | return -ENODATA; | |
277 | ||
278 | mep = to_mtu3_ep(ep); | |
279 | mtu = mep->mtu; | |
280 | mreq = to_mtu3_request(req); | |
281 | mreq->mtu = mtu; | |
282 | ||
283 | if (mreq->mep != mep) | |
284 | return -EINVAL; | |
285 | ||
286 | dev_dbg(mtu->dev, "%s %s EP%d(%s), req=%p, maxp=%d, len#%d\n", | |
287 | __func__, mep->is_in ? "TX" : "RX", mreq->epnum, ep->name, | |
288 | mreq, ep->maxpacket, mreq->request.length); | |
289 | ||
48e0d373 CY |
290 | if (req->length > GPD_BUF_SIZE || |
291 | (mtu->gen2cp && req->length > GPD_BUF_SIZE_EL)) { | |
df2069ac CY |
292 | dev_warn(mtu->dev, |
293 | "req length > supported MAX:%d requested:%d\n", | |
48e0d373 CY |
294 | mtu->gen2cp ? GPD_BUF_SIZE_EL : GPD_BUF_SIZE, |
295 | req->length); | |
df2069ac CY |
296 | return -EOPNOTSUPP; |
297 | } | |
298 | ||
299 | /* don't queue if the ep is down */ | |
300 | if (!mep->desc) { | |
301 | dev_dbg(mtu->dev, "req=%p queued to %s while it's disabled\n", | |
302 | req, ep->name); | |
303 | return -ESHUTDOWN; | |
304 | } | |
305 | ||
306 | mreq->request.actual = 0; | |
307 | mreq->request.status = -EINPROGRESS; | |
308 | ||
309 | ret = usb_gadget_map_request(&mtu->g, req, mep->is_in); | |
310 | if (ret) { | |
311 | dev_err(mtu->dev, "dma mapping failed\n"); | |
312 | return ret; | |
313 | } | |
314 | ||
315 | spin_lock_irqsave(&mtu->lock, flags); | |
316 | ||
317 | if (mtu3_prepare_transfer(mep)) { | |
318 | ret = -EAGAIN; | |
319 | goto error; | |
320 | } | |
321 | ||
322 | list_add_tail(&mreq->list, &mep->req_list); | |
323 | mtu3_insert_gpd(mep, mreq); | |
324 | mtu3_qmu_resume(mep); | |
325 | ||
326 | error: | |
327 | spin_unlock_irqrestore(&mtu->lock, flags); | |
83374e03 | 328 | trace_mtu3_gadget_queue(mreq); |
df2069ac CY |
329 | |
330 | return ret; | |
331 | } | |
332 | ||
333 | static int mtu3_gadget_dequeue(struct usb_ep *ep, struct usb_request *req) | |
334 | { | |
335 | struct mtu3_ep *mep = to_mtu3_ep(ep); | |
336 | struct mtu3_request *mreq = to_mtu3_request(req); | |
337 | struct mtu3_request *r; | |
338 | unsigned long flags; | |
339 | int ret = 0; | |
340 | struct mtu3 *mtu = mep->mtu; | |
341 | ||
342 | if (!ep || !req || mreq->mep != mep) | |
343 | return -EINVAL; | |
344 | ||
345 | dev_dbg(mtu->dev, "%s : req=%p\n", __func__, req); | |
83374e03 | 346 | trace_mtu3_gadget_dequeue(mreq); |
df2069ac CY |
347 | |
348 | spin_lock_irqsave(&mtu->lock, flags); | |
349 | ||
350 | list_for_each_entry(r, &mep->req_list, list) { | |
351 | if (r == mreq) | |
352 | break; | |
353 | } | |
354 | if (r != mreq) { | |
355 | dev_dbg(mtu->dev, "req=%p not queued to %s\n", req, ep->name); | |
356 | ret = -EINVAL; | |
357 | goto done; | |
358 | } | |
359 | ||
360 | mtu3_qmu_flush(mep); /* REVISIT: set BPS ?? */ | |
361 | mtu3_req_complete(mep, req, -ECONNRESET); | |
362 | mtu3_qmu_start(mep); | |
363 | ||
364 | done: | |
365 | spin_unlock_irqrestore(&mtu->lock, flags); | |
366 | ||
367 | return ret; | |
368 | } | |
369 | ||
370 | /* | |
371 | * Set or clear the halt bit of an EP. | |
372 | * A halted EP won't TX/RX any data but will queue requests. | |
373 | */ | |
374 | static int mtu3_gadget_ep_set_halt(struct usb_ep *ep, int value) | |
375 | { | |
376 | struct mtu3_ep *mep = to_mtu3_ep(ep); | |
377 | struct mtu3 *mtu = mep->mtu; | |
378 | struct mtu3_request *mreq; | |
379 | unsigned long flags; | |
380 | int ret = 0; | |
381 | ||
382 | if (!ep) | |
383 | return -EINVAL; | |
384 | ||
385 | dev_dbg(mtu->dev, "%s : %s...", __func__, ep->name); | |
386 | ||
387 | spin_lock_irqsave(&mtu->lock, flags); | |
388 | ||
389 | if (mep->type == USB_ENDPOINT_XFER_ISOC) { | |
390 | ret = -EINVAL; | |
391 | goto done; | |
392 | } | |
393 | ||
394 | mreq = next_request(mep); | |
395 | if (value) { | |
396 | /* | |
397 | * If there is not request for TX-EP, QMU will not transfer | |
398 | * data to TX-FIFO, so no need check whether TX-FIFO | |
399 | * holds bytes or not here | |
400 | */ | |
401 | if (mreq) { | |
402 | dev_dbg(mtu->dev, "req in progress, cannot halt %s\n", | |
403 | ep->name); | |
404 | ret = -EAGAIN; | |
405 | goto done; | |
406 | } | |
407 | } else { | |
408 | mep->wedged = 0; | |
409 | } | |
410 | ||
411 | dev_dbg(mtu->dev, "%s %s stall\n", ep->name, value ? "set" : "clear"); | |
412 | ||
413 | mtu3_ep_stall_set(mep, value); | |
414 | ||
415 | done: | |
416 | spin_unlock_irqrestore(&mtu->lock, flags); | |
83374e03 | 417 | trace_mtu3_gadget_ep_set_halt(mep); |
df2069ac CY |
418 | |
419 | return ret; | |
420 | } | |
421 | ||
422 | /* Sets the halt feature with the clear requests ignored */ | |
423 | static int mtu3_gadget_ep_set_wedge(struct usb_ep *ep) | |
424 | { | |
425 | struct mtu3_ep *mep = to_mtu3_ep(ep); | |
426 | ||
427 | if (!ep) | |
428 | return -EINVAL; | |
429 | ||
430 | mep->wedged = 1; | |
431 | ||
432 | return usb_ep_set_halt(ep); | |
433 | } | |
434 | ||
435 | static const struct usb_ep_ops mtu3_ep_ops = { | |
436 | .enable = mtu3_gadget_ep_enable, | |
437 | .disable = mtu3_gadget_ep_disable, | |
438 | .alloc_request = mtu3_alloc_request, | |
439 | .free_request = mtu3_free_request, | |
440 | .queue = mtu3_gadget_queue, | |
441 | .dequeue = mtu3_gadget_dequeue, | |
442 | .set_halt = mtu3_gadget_ep_set_halt, | |
443 | .set_wedge = mtu3_gadget_ep_set_wedge, | |
444 | }; | |
445 | ||
446 | static int mtu3_gadget_get_frame(struct usb_gadget *gadget) | |
447 | { | |
448 | struct mtu3 *mtu = gadget_to_mtu3(gadget); | |
449 | ||
450 | return (int)mtu3_readl(mtu->mac_base, U3D_USB20_FRAME_NUM); | |
451 | } | |
452 | ||
453 | static int mtu3_gadget_wakeup(struct usb_gadget *gadget) | |
454 | { | |
455 | struct mtu3 *mtu = gadget_to_mtu3(gadget); | |
456 | unsigned long flags; | |
457 | ||
458 | dev_dbg(mtu->dev, "%s\n", __func__); | |
459 | ||
460 | /* remote wakeup feature is not enabled by host */ | |
461 | if (!mtu->may_wakeup) | |
462 | return -EOPNOTSUPP; | |
463 | ||
464 | spin_lock_irqsave(&mtu->lock, flags); | |
4d79e042 | 465 | if (mtu->g.speed >= USB_SPEED_SUPER) { |
a29de31b CY |
466 | mtu3_setbits(mtu->mac_base, U3D_LINK_POWER_CONTROL, UX_EXIT); |
467 | } else { | |
468 | mtu3_setbits(mtu->mac_base, U3D_POWER_MANAGEMENT, RESUME); | |
469 | spin_unlock_irqrestore(&mtu->lock, flags); | |
470 | usleep_range(10000, 11000); | |
471 | spin_lock_irqsave(&mtu->lock, flags); | |
472 | mtu3_clrbits(mtu->mac_base, U3D_POWER_MANAGEMENT, RESUME); | |
473 | } | |
df2069ac CY |
474 | spin_unlock_irqrestore(&mtu->lock, flags); |
475 | return 0; | |
476 | } | |
477 | ||
478 | static int mtu3_gadget_set_self_powered(struct usb_gadget *gadget, | |
479 | int is_selfpowered) | |
480 | { | |
481 | struct mtu3 *mtu = gadget_to_mtu3(gadget); | |
482 | ||
483 | mtu->is_self_powered = !!is_selfpowered; | |
484 | return 0; | |
485 | } | |
486 | ||
487 | static int mtu3_gadget_pullup(struct usb_gadget *gadget, int is_on) | |
488 | { | |
489 | struct mtu3 *mtu = gadget_to_mtu3(gadget); | |
490 | unsigned long flags; | |
491 | ||
492 | dev_dbg(mtu->dev, "%s (%s) for %sactive device\n", __func__, | |
493 | is_on ? "on" : "off", mtu->is_active ? "" : "in"); | |
494 | ||
495 | /* we'd rather not pullup unless the device is active. */ | |
496 | spin_lock_irqsave(&mtu->lock, flags); | |
497 | ||
498 | is_on = !!is_on; | |
499 | if (!mtu->is_active) { | |
500 | /* save it for mtu3_start() to process the request */ | |
501 | mtu->softconnect = is_on; | |
502 | } else if (is_on != mtu->softconnect) { | |
503 | mtu->softconnect = is_on; | |
a29de31b | 504 | mtu3_dev_on_off(mtu, is_on); |
df2069ac CY |
505 | } |
506 | ||
507 | spin_unlock_irqrestore(&mtu->lock, flags); | |
508 | ||
509 | return 0; | |
510 | } | |
511 | ||
512 | static int mtu3_gadget_start(struct usb_gadget *gadget, | |
513 | struct usb_gadget_driver *driver) | |
514 | { | |
515 | struct mtu3 *mtu = gadget_to_mtu3(gadget); | |
516 | unsigned long flags; | |
517 | ||
518 | if (mtu->gadget_driver) { | |
519 | dev_err(mtu->dev, "%s is already bound to %s\n", | |
520 | mtu->g.name, mtu->gadget_driver->driver.name); | |
521 | return -EBUSY; | |
522 | } | |
523 | ||
524 | dev_dbg(mtu->dev, "bind driver %s\n", driver->function); | |
525 | ||
526 | spin_lock_irqsave(&mtu->lock, flags); | |
527 | ||
528 | mtu->softconnect = 0; | |
529 | mtu->gadget_driver = driver; | |
530 | ||
d0ed062a CY |
531 | if (mtu->ssusb->dr_mode == USB_DR_MODE_PERIPHERAL) |
532 | mtu3_start(mtu); | |
df2069ac CY |
533 | |
534 | spin_unlock_irqrestore(&mtu->lock, flags); | |
535 | ||
536 | return 0; | |
537 | } | |
538 | ||
539 | static void stop_activity(struct mtu3 *mtu) | |
540 | { | |
541 | struct usb_gadget_driver *driver = mtu->gadget_driver; | |
542 | int i; | |
543 | ||
544 | /* don't disconnect if it's not connected */ | |
545 | if (mtu->g.speed == USB_SPEED_UNKNOWN) | |
546 | driver = NULL; | |
547 | else | |
548 | mtu->g.speed = USB_SPEED_UNKNOWN; | |
549 | ||
550 | /* deactivate the hardware */ | |
551 | if (mtu->softconnect) { | |
552 | mtu->softconnect = 0; | |
a29de31b | 553 | mtu3_dev_on_off(mtu, 0); |
df2069ac CY |
554 | } |
555 | ||
556 | /* | |
557 | * killing any outstanding requests will quiesce the driver; | |
558 | * then report disconnect | |
559 | */ | |
560 | nuke(mtu->ep0, -ESHUTDOWN); | |
561 | for (i = 1; i < mtu->num_eps; i++) { | |
562 | nuke(mtu->in_eps + i, -ESHUTDOWN); | |
563 | nuke(mtu->out_eps + i, -ESHUTDOWN); | |
564 | } | |
565 | ||
566 | if (driver) { | |
567 | spin_unlock(&mtu->lock); | |
568 | driver->disconnect(&mtu->g); | |
569 | spin_lock(&mtu->lock); | |
570 | } | |
571 | } | |
572 | ||
573 | static int mtu3_gadget_stop(struct usb_gadget *g) | |
574 | { | |
575 | struct mtu3 *mtu = gadget_to_mtu3(g); | |
576 | unsigned long flags; | |
577 | ||
578 | dev_dbg(mtu->dev, "%s\n", __func__); | |
579 | ||
580 | spin_lock_irqsave(&mtu->lock, flags); | |
581 | ||
582 | stop_activity(mtu); | |
583 | mtu->gadget_driver = NULL; | |
584 | ||
d0ed062a CY |
585 | if (mtu->ssusb->dr_mode == USB_DR_MODE_PERIPHERAL) |
586 | mtu3_stop(mtu); | |
df2069ac CY |
587 | |
588 | spin_unlock_irqrestore(&mtu->lock, flags); | |
589 | ||
590 | return 0; | |
591 | } | |
592 | ||
593 | static const struct usb_gadget_ops mtu3_gadget_ops = { | |
594 | .get_frame = mtu3_gadget_get_frame, | |
595 | .wakeup = mtu3_gadget_wakeup, | |
596 | .set_selfpowered = mtu3_gadget_set_self_powered, | |
597 | .pullup = mtu3_gadget_pullup, | |
598 | .udc_start = mtu3_gadget_start, | |
599 | .udc_stop = mtu3_gadget_stop, | |
600 | }; | |
601 | ||
0eae4958 CY |
602 | static void mtu3_state_reset(struct mtu3 *mtu) |
603 | { | |
604 | mtu->address = 0; | |
605 | mtu->ep0_state = MU3D_EP0_STATE_SETUP; | |
606 | mtu->may_wakeup = 0; | |
607 | mtu->u1_enable = 0; | |
608 | mtu->u2_enable = 0; | |
609 | mtu->delayed_status = false; | |
610 | mtu->test_mode = false; | |
611 | } | |
612 | ||
df2069ac CY |
613 | static void init_hw_ep(struct mtu3 *mtu, struct mtu3_ep *mep, |
614 | u32 epnum, u32 is_in) | |
615 | { | |
616 | mep->epnum = epnum; | |
617 | mep->mtu = mtu; | |
618 | mep->is_in = is_in; | |
619 | ||
620 | INIT_LIST_HEAD(&mep->req_list); | |
621 | ||
622 | sprintf(mep->name, "ep%d%s", epnum, | |
623 | !epnum ? "" : (is_in ? "in" : "out")); | |
624 | ||
625 | mep->ep.name = mep->name; | |
626 | INIT_LIST_HEAD(&mep->ep.ep_list); | |
627 | ||
a29de31b | 628 | /* initialize maxpacket as SS */ |
df2069ac | 629 | if (!epnum) { |
a29de31b | 630 | usb_ep_set_maxpacket_limit(&mep->ep, 512); |
df2069ac CY |
631 | mep->ep.caps.type_control = true; |
632 | mep->ep.ops = &mtu3_ep0_ops; | |
633 | mtu->g.ep0 = &mep->ep; | |
634 | } else { | |
a29de31b | 635 | usb_ep_set_maxpacket_limit(&mep->ep, 1024); |
df2069ac CY |
636 | mep->ep.caps.type_iso = true; |
637 | mep->ep.caps.type_bulk = true; | |
638 | mep->ep.caps.type_int = true; | |
639 | mep->ep.ops = &mtu3_ep_ops; | |
640 | list_add_tail(&mep->ep.ep_list, &mtu->g.ep_list); | |
641 | } | |
642 | ||
643 | dev_dbg(mtu->dev, "%s, name=%s, maxp=%d\n", __func__, mep->ep.name, | |
644 | mep->ep.maxpacket); | |
645 | ||
646 | if (!epnum) { | |
647 | mep->ep.caps.dir_in = true; | |
648 | mep->ep.caps.dir_out = true; | |
649 | } else if (is_in) { | |
650 | mep->ep.caps.dir_in = true; | |
651 | } else { | |
652 | mep->ep.caps.dir_out = true; | |
653 | } | |
654 | } | |
655 | ||
656 | static void mtu3_gadget_init_eps(struct mtu3 *mtu) | |
657 | { | |
658 | u8 epnum; | |
659 | ||
660 | /* initialize endpoint list just once */ | |
661 | INIT_LIST_HEAD(&(mtu->g.ep_list)); | |
662 | ||
663 | dev_dbg(mtu->dev, "%s num_eps(1 for a pair of tx&rx ep)=%d\n", | |
664 | __func__, mtu->num_eps); | |
665 | ||
666 | init_hw_ep(mtu, mtu->ep0, 0, 0); | |
667 | for (epnum = 1; epnum < mtu->num_eps; epnum++) { | |
668 | init_hw_ep(mtu, mtu->in_eps + epnum, epnum, 1); | |
669 | init_hw_ep(mtu, mtu->out_eps + epnum, epnum, 0); | |
670 | } | |
671 | } | |
672 | ||
673 | int mtu3_gadget_setup(struct mtu3 *mtu) | |
674 | { | |
675 | int ret; | |
676 | ||
677 | mtu->g.ops = &mtu3_gadget_ops; | |
a29de31b | 678 | mtu->g.max_speed = mtu->max_speed; |
df2069ac CY |
679 | mtu->g.speed = USB_SPEED_UNKNOWN; |
680 | mtu->g.sg_supported = 0; | |
681 | mtu->g.name = MTU3_DRIVER_NAME; | |
682 | mtu->is_active = 0; | |
fe7c994a | 683 | mtu->delayed_status = false; |
df2069ac CY |
684 | |
685 | mtu3_gadget_init_eps(mtu); | |
686 | ||
687 | ret = usb_add_gadget_udc(mtu->dev, &mtu->g); | |
00505ade | 688 | if (ret) |
df2069ac | 689 | dev_err(mtu->dev, "failed to register udc\n"); |
df2069ac | 690 | |
00505ade | 691 | return ret; |
df2069ac CY |
692 | } |
693 | ||
694 | void mtu3_gadget_cleanup(struct mtu3 *mtu) | |
695 | { | |
696 | usb_del_gadget_udc(&mtu->g); | |
697 | } | |
698 | ||
699 | void mtu3_gadget_resume(struct mtu3 *mtu) | |
700 | { | |
701 | dev_dbg(mtu->dev, "gadget RESUME\n"); | |
702 | if (mtu->gadget_driver && mtu->gadget_driver->resume) { | |
703 | spin_unlock(&mtu->lock); | |
704 | mtu->gadget_driver->resume(&mtu->g); | |
705 | spin_lock(&mtu->lock); | |
706 | } | |
707 | } | |
708 | ||
709 | /* called when SOF packets stop for 3+ msec or enters U3 */ | |
710 | void mtu3_gadget_suspend(struct mtu3 *mtu) | |
711 | { | |
712 | dev_dbg(mtu->dev, "gadget SUSPEND\n"); | |
713 | if (mtu->gadget_driver && mtu->gadget_driver->suspend) { | |
714 | spin_unlock(&mtu->lock); | |
715 | mtu->gadget_driver->suspend(&mtu->g); | |
716 | spin_lock(&mtu->lock); | |
717 | } | |
718 | } | |
719 | ||
720 | /* called when VBUS drops below session threshold, and in other cases */ | |
721 | void mtu3_gadget_disconnect(struct mtu3 *mtu) | |
722 | { | |
723 | dev_dbg(mtu->dev, "gadget DISCONNECT\n"); | |
724 | if (mtu->gadget_driver && mtu->gadget_driver->disconnect) { | |
725 | spin_unlock(&mtu->lock); | |
726 | mtu->gadget_driver->disconnect(&mtu->g); | |
727 | spin_lock(&mtu->lock); | |
728 | } | |
729 | ||
0eae4958 | 730 | mtu3_state_reset(mtu); |
df2069ac CY |
731 | usb_gadget_set_state(&mtu->g, USB_STATE_NOTATTACHED); |
732 | } | |
733 | ||
734 | void mtu3_gadget_reset(struct mtu3 *mtu) | |
735 | { | |
736 | dev_dbg(mtu->dev, "gadget RESET\n"); | |
737 | ||
738 | /* report disconnect, if we didn't flush EP state */ | |
739 | if (mtu->g.speed != USB_SPEED_UNKNOWN) | |
740 | mtu3_gadget_disconnect(mtu); | |
0eae4958 CY |
741 | else |
742 | mtu3_state_reset(mtu); | |
df2069ac | 743 | } |