Commit | Line | Data |
---|---|---|
72246da4 FB |
1 | /** |
2 | * ep0.c - DesignWare USB3 DRD Controller Endpoint 0 Handling | |
3 | * | |
4 | * Copyright (C) 2010-2011 Texas Instruments Incorporated - http://www.ti.com | |
72246da4 FB |
5 | * |
6 | * Authors: Felipe Balbi <balbi@ti.com>, | |
7 | * Sebastian Andrzej Siewior <bigeasy@linutronix.de> | |
8 | * | |
5945f789 FB |
9 | * This program is free software: you can redistribute it and/or modify |
10 | * it under the terms of the GNU General Public License version 2 of | |
11 | * the License as published by the Free Software Foundation. | |
72246da4 | 12 | * |
5945f789 FB |
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. | |
72246da4 FB |
17 | */ |
18 | ||
19 | #include <linux/kernel.h> | |
20 | #include <linux/slab.h> | |
21 | #include <linux/spinlock.h> | |
22 | #include <linux/platform_device.h> | |
23 | #include <linux/pm_runtime.h> | |
24 | #include <linux/interrupt.h> | |
25 | #include <linux/io.h> | |
26 | #include <linux/list.h> | |
27 | #include <linux/dma-mapping.h> | |
28 | ||
29 | #include <linux/usb/ch9.h> | |
30 | #include <linux/usb/gadget.h> | |
5bdb1dcc | 31 | #include <linux/usb/composite.h> |
72246da4 FB |
32 | |
33 | #include "core.h" | |
80977dc9 | 34 | #include "debug.h" |
72246da4 FB |
35 | #include "gadget.h" |
36 | #include "io.h" | |
37 | ||
788a23f4 | 38 | static void __dwc3_ep0_do_control_status(struct dwc3 *dwc, struct dwc3_ep *dep); |
a0807881 FB |
39 | static void __dwc3_ep0_do_control_data(struct dwc3 *dwc, |
40 | struct dwc3_ep *dep, struct dwc3_request *req); | |
5bdb1dcc | 41 | |
72246da4 FB |
42 | static const char *dwc3_ep0_state_string(enum dwc3_ep0_state state) |
43 | { | |
44 | switch (state) { | |
45 | case EP0_UNCONNECTED: | |
46 | return "Unconnected"; | |
c7fcdeb2 FB |
47 | case EP0_SETUP_PHASE: |
48 | return "Setup Phase"; | |
49 | case EP0_DATA_PHASE: | |
50 | return "Data Phase"; | |
51 | case EP0_STATUS_PHASE: | |
52 | return "Status Phase"; | |
72246da4 FB |
53 | default: |
54 | return "UNKNOWN"; | |
55 | } | |
56 | } | |
57 | ||
58 | static int dwc3_ep0_start_trans(struct dwc3 *dwc, u8 epnum, dma_addr_t buf_dma, | |
368ca113 | 59 | u32 len, u32 type, bool chain) |
72246da4 FB |
60 | { |
61 | struct dwc3_gadget_ep_cmd_params params; | |
f6bafc6a | 62 | struct dwc3_trb *trb; |
72246da4 FB |
63 | struct dwc3_ep *dep; |
64 | ||
65 | int ret; | |
66 | ||
67 | dep = dwc->eps[epnum]; | |
c7fcdeb2 | 68 | if (dep->flags & DWC3_EP_BUSY) { |
2c4cbe6e | 69 | dwc3_trace(trace_dwc3_ep0, "%s still busy", dep->name); |
c7fcdeb2 FB |
70 | return 0; |
71 | } | |
72246da4 | 72 | |
2abd9d5f KVA |
73 | trb = &dwc->ep0_trb[dep->free_slot]; |
74 | ||
75 | if (chain) | |
76 | dep->free_slot++; | |
72246da4 | 77 | |
f6bafc6a FB |
78 | trb->bpl = lower_32_bits(buf_dma); |
79 | trb->bph = upper_32_bits(buf_dma); | |
80 | trb->size = len; | |
81 | trb->ctrl = type; | |
72246da4 | 82 | |
f6bafc6a | 83 | trb->ctrl |= (DWC3_TRB_CTRL_HWO |
f6bafc6a | 84 | | DWC3_TRB_CTRL_ISP_IMI); |
72246da4 | 85 | |
2abd9d5f KVA |
86 | if (chain) |
87 | trb->ctrl |= DWC3_TRB_CTRL_CHN; | |
88 | else | |
89 | trb->ctrl |= (DWC3_TRB_CTRL_IOC | |
90 | | DWC3_TRB_CTRL_LST); | |
91 | ||
92 | if (chain) | |
93 | return 0; | |
94 | ||
72246da4 | 95 | memset(¶ms, 0, sizeof(params)); |
dc1c70a7 FB |
96 | params.param0 = upper_32_bits(dwc->ep0_trb_addr); |
97 | params.param1 = lower_32_bits(dwc->ep0_trb_addr); | |
72246da4 | 98 | |
ccb072de FB |
99 | trace_dwc3_prepare_trb(dep, trb); |
100 | ||
72246da4 FB |
101 | ret = dwc3_send_gadget_ep_cmd(dwc, dep->number, |
102 | DWC3_DEPCMD_STARTTRANSFER, ¶ms); | |
103 | if (ret < 0) { | |
2c4cbe6e FB |
104 | dwc3_trace(trace_dwc3_ep0, "%s STARTTRANSFER failed", |
105 | dep->name); | |
72246da4 FB |
106 | return ret; |
107 | } | |
108 | ||
c7fcdeb2 | 109 | dep->flags |= DWC3_EP_BUSY; |
b4996a86 | 110 | dep->resource_index = dwc3_gadget_ep_get_transfer_index(dwc, |
72246da4 FB |
111 | dep->number); |
112 | ||
1ddcb218 FB |
113 | dwc->ep0_next_event = DWC3_EP0_COMPLETE; |
114 | ||
72246da4 FB |
115 | return 0; |
116 | } | |
117 | ||
118 | static int __dwc3_gadget_ep0_queue(struct dwc3_ep *dep, | |
119 | struct dwc3_request *req) | |
120 | { | |
5bdb1dcc | 121 | struct dwc3 *dwc = dep->dwc; |
72246da4 FB |
122 | |
123 | req->request.actual = 0; | |
124 | req->request.status = -EINPROGRESS; | |
72246da4 FB |
125 | req->epnum = dep->number; |
126 | ||
127 | list_add_tail(&req->list, &dep->request_list); | |
a6829706 | 128 | |
c7fcdeb2 FB |
129 | /* |
130 | * Gadget driver might not be quick enough to queue a request | |
131 | * before we get a Transfer Not Ready event on this endpoint. | |
132 | * | |
133 | * In that case, we will set DWC3_EP_PENDING_REQUEST. When that | |
134 | * flag is set, it's telling us that as soon as Gadget queues the | |
135 | * required request, we should kick the transfer here because the | |
136 | * IRQ we were waiting for is long gone. | |
137 | */ | |
138 | if (dep->flags & DWC3_EP_PENDING_REQUEST) { | |
c7fcdeb2 | 139 | unsigned direction; |
c7fcdeb2 FB |
140 | |
141 | direction = !!(dep->flags & DWC3_EP0_DIR_IN); | |
142 | ||
68d8a781 FB |
143 | if (dwc->ep0state != EP0_DATA_PHASE) { |
144 | dev_WARN(dwc->dev, "Unexpected pending request\n"); | |
c7fcdeb2 FB |
145 | return 0; |
146 | } | |
72246da4 | 147 | |
a0807881 FB |
148 | __dwc3_ep0_do_control_data(dwc, dwc->eps[direction], req); |
149 | ||
c7fcdeb2 FB |
150 | dep->flags &= ~(DWC3_EP_PENDING_REQUEST | |
151 | DWC3_EP0_DIR_IN); | |
d9b33c60 FB |
152 | |
153 | return 0; | |
154 | } | |
155 | ||
156 | /* | |
157 | * In case gadget driver asked us to delay the STATUS phase, | |
158 | * handle it here. | |
159 | */ | |
160 | if (dwc->delayed_status) { | |
7125d584 FB |
161 | unsigned direction; |
162 | ||
163 | direction = !dwc->ep0_expect_in; | |
5bdb1dcc | 164 | dwc->delayed_status = false; |
7c81290e | 165 | usb_gadget_set_state(&dwc->gadget, USB_STATE_CONFIGURED); |
68d3e668 FB |
166 | |
167 | if (dwc->ep0state == EP0_STATUS_PHASE) | |
7125d584 | 168 | __dwc3_ep0_do_control_status(dwc, dwc->eps[direction]); |
68d3e668 | 169 | else |
2c4cbe6e FB |
170 | dwc3_trace(trace_dwc3_ep0, |
171 | "too early for delayed status"); | |
d9b33c60 FB |
172 | |
173 | return 0; | |
72246da4 FB |
174 | } |
175 | ||
fca8892a FB |
176 | /* |
177 | * Unfortunately we have uncovered a limitation wrt the Data Phase. | |
178 | * | |
179 | * Section 9.4 says we can wait for the XferNotReady(DATA) event to | |
180 | * come before issueing Start Transfer command, but if we do, we will | |
181 | * miss situations where the host starts another SETUP phase instead of | |
182 | * the DATA phase. Such cases happen at least on TD.7.6 of the Link | |
183 | * Layer Compliance Suite. | |
184 | * | |
185 | * The problem surfaces due to the fact that in case of back-to-back | |
186 | * SETUP packets there will be no XferNotReady(DATA) generated and we | |
187 | * will be stuck waiting for XferNotReady(DATA) forever. | |
188 | * | |
189 | * By looking at tables 9-13 and 9-14 of the Databook, we can see that | |
190 | * it tells us to start Data Phase right away. It also mentions that if | |
191 | * we receive a SETUP phase instead of the DATA phase, core will issue | |
192 | * XferComplete for the DATA phase, before actually initiating it in | |
193 | * the wire, with the TRB's status set to "SETUP_PENDING". Such status | |
194 | * can only be used to print some debugging logs, as the core expects | |
195 | * us to go through to the STATUS phase and start a CONTROL_STATUS TRB, | |
196 | * just so it completes right away, without transferring anything and, | |
197 | * only then, we can go back to the SETUP phase. | |
198 | * | |
199 | * Because of this scenario, SNPS decided to change the programming | |
200 | * model of control transfers and support on-demand transfers only for | |
201 | * the STATUS phase. To fix the issue we have now, we will always wait | |
202 | * for gadget driver to queue the DATA phase's struct usb_request, then | |
203 | * start it right away. | |
204 | * | |
205 | * If we're actually in a 2-stage transfer, we will wait for | |
206 | * XferNotReady(STATUS). | |
207 | */ | |
208 | if (dwc->three_stage_setup) { | |
209 | unsigned direction; | |
210 | ||
211 | direction = dwc->ep0_expect_in; | |
212 | dwc->ep0state = EP0_DATA_PHASE; | |
213 | ||
214 | __dwc3_ep0_do_control_data(dwc, dwc->eps[direction], req); | |
215 | ||
216 | dep->flags &= ~DWC3_EP0_DIR_IN; | |
217 | } | |
218 | ||
35f75696 | 219 | return 0; |
72246da4 FB |
220 | } |
221 | ||
222 | int dwc3_gadget_ep0_queue(struct usb_ep *ep, struct usb_request *request, | |
223 | gfp_t gfp_flags) | |
224 | { | |
225 | struct dwc3_request *req = to_dwc3_request(request); | |
226 | struct dwc3_ep *dep = to_dwc3_ep(ep); | |
227 | struct dwc3 *dwc = dep->dwc; | |
228 | ||
229 | unsigned long flags; | |
230 | ||
231 | int ret; | |
232 | ||
72246da4 | 233 | spin_lock_irqsave(&dwc->lock, flags); |
16e78db7 | 234 | if (!dep->endpoint.desc) { |
2c4cbe6e FB |
235 | dwc3_trace(trace_dwc3_ep0, |
236 | "trying to queue request %p to disabled %s", | |
72246da4 FB |
237 | request, dep->name); |
238 | ret = -ESHUTDOWN; | |
239 | goto out; | |
240 | } | |
241 | ||
242 | /* we share one TRB for ep0/1 */ | |
c2da2ff0 | 243 | if (!list_empty(&dep->request_list)) { |
72246da4 FB |
244 | ret = -EBUSY; |
245 | goto out; | |
246 | } | |
247 | ||
2c4cbe6e FB |
248 | dwc3_trace(trace_dwc3_ep0, |
249 | "queueing request %p to %s length %d state '%s'", | |
72246da4 FB |
250 | request, dep->name, request->length, |
251 | dwc3_ep0_state_string(dwc->ep0state)); | |
252 | ||
253 | ret = __dwc3_gadget_ep0_queue(dep, req); | |
254 | ||
255 | out: | |
256 | spin_unlock_irqrestore(&dwc->lock, flags); | |
257 | ||
258 | return ret; | |
259 | } | |
260 | ||
261 | static void dwc3_ep0_stall_and_restart(struct dwc3 *dwc) | |
262 | { | |
2dfe37d4 FB |
263 | struct dwc3_ep *dep; |
264 | ||
265 | /* reinitialize physical ep1 */ | |
266 | dep = dwc->eps[1]; | |
267 | dep->flags = DWC3_EP_ENABLED; | |
d742220b | 268 | |
72246da4 | 269 | /* stall is always issued on EP0 */ |
2dfe37d4 | 270 | dep = dwc->eps[0]; |
7a608559 | 271 | __dwc3_gadget_ep_set_halt(dep, 1, false); |
c2da2ff0 | 272 | dep->flags = DWC3_EP_ENABLED; |
5bdb1dcc | 273 | dwc->delayed_status = false; |
d742220b FB |
274 | |
275 | if (!list_empty(&dep->request_list)) { | |
276 | struct dwc3_request *req; | |
277 | ||
278 | req = next_request(&dep->request_list); | |
279 | dwc3_gadget_giveback(dep, req, -ECONNRESET); | |
280 | } | |
281 | ||
c7fcdeb2 | 282 | dwc->ep0state = EP0_SETUP_PHASE; |
72246da4 FB |
283 | dwc3_ep0_out_start(dwc); |
284 | } | |
285 | ||
33fb691b | 286 | int __dwc3_gadget_ep0_set_halt(struct usb_ep *ep, int value) |
08f0d966 PA |
287 | { |
288 | struct dwc3_ep *dep = to_dwc3_ep(ep); | |
289 | struct dwc3 *dwc = dep->dwc; | |
290 | ||
291 | dwc3_ep0_stall_and_restart(dwc); | |
292 | ||
293 | return 0; | |
294 | } | |
295 | ||
33fb691b FB |
296 | int dwc3_gadget_ep0_set_halt(struct usb_ep *ep, int value) |
297 | { | |
298 | struct dwc3_ep *dep = to_dwc3_ep(ep); | |
299 | struct dwc3 *dwc = dep->dwc; | |
300 | unsigned long flags; | |
301 | int ret; | |
302 | ||
303 | spin_lock_irqsave(&dwc->lock, flags); | |
304 | ret = __dwc3_gadget_ep0_set_halt(ep, value); | |
305 | spin_unlock_irqrestore(&dwc->lock, flags); | |
306 | ||
307 | return ret; | |
308 | } | |
309 | ||
72246da4 FB |
310 | void dwc3_ep0_out_start(struct dwc3 *dwc) |
311 | { | |
72246da4 FB |
312 | int ret; |
313 | ||
c7fcdeb2 | 314 | ret = dwc3_ep0_start_trans(dwc, 0, dwc->ctrl_req_addr, 8, |
368ca113 | 315 | DWC3_TRBCTL_CONTROL_SETUP, false); |
72246da4 FB |
316 | WARN_ON(ret < 0); |
317 | } | |
318 | ||
72246da4 FB |
319 | static struct dwc3_ep *dwc3_wIndex_to_dep(struct dwc3 *dwc, __le16 wIndex_le) |
320 | { | |
321 | struct dwc3_ep *dep; | |
322 | u32 windex = le16_to_cpu(wIndex_le); | |
323 | u32 epnum; | |
324 | ||
325 | epnum = (windex & USB_ENDPOINT_NUMBER_MASK) << 1; | |
326 | if ((windex & USB_ENDPOINT_DIR_MASK) == USB_DIR_IN) | |
327 | epnum |= 1; | |
328 | ||
329 | dep = dwc->eps[epnum]; | |
330 | if (dep->flags & DWC3_EP_ENABLED) | |
331 | return dep; | |
332 | ||
333 | return NULL; | |
334 | } | |
335 | ||
8ee6270c | 336 | static void dwc3_ep0_status_cmpl(struct usb_ep *ep, struct usb_request *req) |
72246da4 | 337 | { |
72246da4 | 338 | } |
72246da4 FB |
339 | /* |
340 | * ch 9.4.5 | |
341 | */ | |
25b8ff68 FB |
342 | static int dwc3_ep0_handle_status(struct dwc3 *dwc, |
343 | struct usb_ctrlrequest *ctrl) | |
72246da4 FB |
344 | { |
345 | struct dwc3_ep *dep; | |
346 | u32 recip; | |
e6a3b5e2 | 347 | u32 reg; |
72246da4 FB |
348 | u16 usb_status = 0; |
349 | __le16 *response_pkt; | |
350 | ||
351 | recip = ctrl->bRequestType & USB_RECIP_MASK; | |
352 | switch (recip) { | |
353 | case USB_RECIP_DEVICE: | |
354 | /* | |
e6a3b5e2 | 355 | * LTM will be set once we know how to set this in HW. |
72246da4 | 356 | */ |
bcdea503 | 357 | usb_status |= dwc->gadget.is_selfpowered; |
e6a3b5e2 SAS |
358 | |
359 | if (dwc->speed == DWC3_DSTS_SUPERSPEED) { | |
360 | reg = dwc3_readl(dwc->regs, DWC3_DCTL); | |
361 | if (reg & DWC3_DCTL_INITU1ENA) | |
362 | usb_status |= 1 << USB_DEV_STAT_U1_ENABLED; | |
363 | if (reg & DWC3_DCTL_INITU2ENA) | |
364 | usb_status |= 1 << USB_DEV_STAT_U2_ENABLED; | |
365 | } | |
366 | ||
72246da4 FB |
367 | break; |
368 | ||
369 | case USB_RECIP_INTERFACE: | |
370 | /* | |
371 | * Function Remote Wake Capable D0 | |
372 | * Function Remote Wakeup D1 | |
373 | */ | |
374 | break; | |
375 | ||
376 | case USB_RECIP_ENDPOINT: | |
377 | dep = dwc3_wIndex_to_dep(dwc, ctrl->wIndex); | |
378 | if (!dep) | |
25b8ff68 | 379 | return -EINVAL; |
72246da4 FB |
380 | |
381 | if (dep->flags & DWC3_EP_STALL) | |
382 | usb_status = 1 << USB_ENDPOINT_HALT; | |
383 | break; | |
384 | default: | |
385 | return -EINVAL; | |
2b84f92b | 386 | } |
72246da4 FB |
387 | |
388 | response_pkt = (__le16 *) dwc->setup_buf; | |
389 | *response_pkt = cpu_to_le16(usb_status); | |
e2617796 FB |
390 | |
391 | dep = dwc->eps[0]; | |
392 | dwc->ep0_usb_req.dep = dep; | |
e0ce0b0a | 393 | dwc->ep0_usb_req.request.length = sizeof(*response_pkt); |
0fc9a1be | 394 | dwc->ep0_usb_req.request.buf = dwc->setup_buf; |
e0ce0b0a | 395 | dwc->ep0_usb_req.request.complete = dwc3_ep0_status_cmpl; |
e2617796 FB |
396 | |
397 | return __dwc3_gadget_ep0_queue(dep, &dwc->ep0_usb_req); | |
72246da4 FB |
398 | } |
399 | ||
400 | static int dwc3_ep0_handle_feature(struct dwc3 *dwc, | |
401 | struct usb_ctrlrequest *ctrl, int set) | |
402 | { | |
403 | struct dwc3_ep *dep; | |
404 | u32 recip; | |
405 | u32 wValue; | |
406 | u32 wIndex; | |
e6a3b5e2 | 407 | u32 reg; |
72246da4 | 408 | int ret; |
fdba5aa5 | 409 | enum usb_device_state state; |
72246da4 FB |
410 | |
411 | wValue = le16_to_cpu(ctrl->wValue); | |
412 | wIndex = le16_to_cpu(ctrl->wIndex); | |
413 | recip = ctrl->bRequestType & USB_RECIP_MASK; | |
fdba5aa5 FB |
414 | state = dwc->gadget.state; |
415 | ||
72246da4 FB |
416 | switch (recip) { |
417 | case USB_RECIP_DEVICE: | |
418 | ||
e6a3b5e2 SAS |
419 | switch (wValue) { |
420 | case USB_DEVICE_REMOTE_WAKEUP: | |
421 | break; | |
72246da4 FB |
422 | /* |
423 | * 9.4.1 says only only for SS, in AddressState only for | |
424 | * default control pipe | |
425 | */ | |
72246da4 | 426 | case USB_DEVICE_U1_ENABLE: |
fdba5aa5 | 427 | if (state != USB_STATE_CONFIGURED) |
72246da4 FB |
428 | return -EINVAL; |
429 | if (dwc->speed != DWC3_DSTS_SUPERSPEED) | |
430 | return -EINVAL; | |
72246da4 | 431 | |
e6a3b5e2 SAS |
432 | reg = dwc3_readl(dwc->regs, DWC3_DCTL); |
433 | if (set) | |
434 | reg |= DWC3_DCTL_INITU1ENA; | |
435 | else | |
436 | reg &= ~DWC3_DCTL_INITU1ENA; | |
437 | dwc3_writel(dwc->regs, DWC3_DCTL, reg); | |
72246da4 | 438 | break; |
e6a3b5e2 | 439 | |
72246da4 | 440 | case USB_DEVICE_U2_ENABLE: |
fdba5aa5 | 441 | if (state != USB_STATE_CONFIGURED) |
e6a3b5e2 SAS |
442 | return -EINVAL; |
443 | if (dwc->speed != DWC3_DSTS_SUPERSPEED) | |
444 | return -EINVAL; | |
445 | ||
446 | reg = dwc3_readl(dwc->regs, DWC3_DCTL); | |
447 | if (set) | |
448 | reg |= DWC3_DCTL_INITU2ENA; | |
449 | else | |
450 | reg &= ~DWC3_DCTL_INITU2ENA; | |
451 | dwc3_writel(dwc->regs, DWC3_DCTL, reg); | |
72246da4 | 452 | break; |
e6a3b5e2 | 453 | |
72246da4 | 454 | case USB_DEVICE_LTM_ENABLE: |
e6a3b5e2 | 455 | return -EINVAL; |
72246da4 FB |
456 | |
457 | case USB_DEVICE_TEST_MODE: | |
458 | if ((wIndex & 0xff) != 0) | |
459 | return -EINVAL; | |
460 | if (!set) | |
461 | return -EINVAL; | |
462 | ||
3b637367 GC |
463 | dwc->test_mode_nr = wIndex >> 8; |
464 | dwc->test_mode = true; | |
ecb07797 GC |
465 | break; |
466 | default: | |
467 | return -EINVAL; | |
72246da4 FB |
468 | } |
469 | break; | |
470 | ||
471 | case USB_RECIP_INTERFACE: | |
472 | switch (wValue) { | |
473 | case USB_INTRF_FUNC_SUSPEND: | |
474 | if (wIndex & USB_INTRF_FUNC_SUSPEND_LP) | |
475 | /* XXX enable Low power suspend */ | |
476 | ; | |
477 | if (wIndex & USB_INTRF_FUNC_SUSPEND_RW) | |
478 | /* XXX enable remote wakeup */ | |
479 | ; | |
480 | break; | |
481 | default: | |
482 | return -EINVAL; | |
483 | } | |
484 | break; | |
485 | ||
486 | case USB_RECIP_ENDPOINT: | |
487 | switch (wValue) { | |
488 | case USB_ENDPOINT_HALT: | |
1d046793 | 489 | dep = dwc3_wIndex_to_dep(dwc, wIndex); |
72246da4 FB |
490 | if (!dep) |
491 | return -EINVAL; | |
a535d81c AS |
492 | if (set == 0 && (dep->flags & DWC3_EP_WEDGE)) |
493 | break; | |
7a608559 | 494 | ret = __dwc3_gadget_ep_set_halt(dep, set, true); |
72246da4 FB |
495 | if (ret) |
496 | return -EINVAL; | |
497 | break; | |
498 | default: | |
499 | return -EINVAL; | |
500 | } | |
501 | break; | |
502 | ||
503 | default: | |
504 | return -EINVAL; | |
2b84f92b | 505 | } |
72246da4 | 506 | |
72246da4 FB |
507 | return 0; |
508 | } | |
509 | ||
510 | static int dwc3_ep0_set_address(struct dwc3 *dwc, struct usb_ctrlrequest *ctrl) | |
511 | { | |
fdba5aa5 | 512 | enum usb_device_state state = dwc->gadget.state; |
72246da4 FB |
513 | u32 addr; |
514 | u32 reg; | |
515 | ||
516 | addr = le16_to_cpu(ctrl->wValue); | |
f96a6ec1 | 517 | if (addr > 127) { |
2c4cbe6e | 518 | dwc3_trace(trace_dwc3_ep0, "invalid device address %d", addr); |
72246da4 | 519 | return -EINVAL; |
f96a6ec1 FB |
520 | } |
521 | ||
fdba5aa5 | 522 | if (state == USB_STATE_CONFIGURED) { |
2c4cbe6e FB |
523 | dwc3_trace(trace_dwc3_ep0, |
524 | "trying to set address when configured"); | |
f96a6ec1 FB |
525 | return -EINVAL; |
526 | } | |
72246da4 | 527 | |
2646021e FB |
528 | reg = dwc3_readl(dwc->regs, DWC3_DCFG); |
529 | reg &= ~(DWC3_DCFG_DEVADDR_MASK); | |
530 | reg |= DWC3_DCFG_DEVADDR(addr); | |
531 | dwc3_writel(dwc->regs, DWC3_DCFG, reg); | |
72246da4 | 532 | |
fdba5aa5 | 533 | if (addr) |
14cd592f | 534 | usb_gadget_set_state(&dwc->gadget, USB_STATE_ADDRESS); |
fdba5aa5 | 535 | else |
14cd592f | 536 | usb_gadget_set_state(&dwc->gadget, USB_STATE_DEFAULT); |
c7fcdeb2 | 537 | |
2646021e | 538 | return 0; |
72246da4 FB |
539 | } |
540 | ||
541 | static int dwc3_ep0_delegate_req(struct dwc3 *dwc, struct usb_ctrlrequest *ctrl) | |
542 | { | |
543 | int ret; | |
544 | ||
545 | spin_unlock(&dwc->lock); | |
546 | ret = dwc->gadget_driver->setup(&dwc->gadget, ctrl); | |
547 | spin_lock(&dwc->lock); | |
548 | return ret; | |
549 | } | |
550 | ||
551 | static int dwc3_ep0_set_config(struct dwc3 *dwc, struct usb_ctrlrequest *ctrl) | |
552 | { | |
fdba5aa5 | 553 | enum usb_device_state state = dwc->gadget.state; |
72246da4 FB |
554 | u32 cfg; |
555 | int ret; | |
e274a31e | 556 | u32 reg; |
72246da4 | 557 | |
b23c8439 | 558 | dwc->start_config_issued = false; |
72246da4 FB |
559 | cfg = le16_to_cpu(ctrl->wValue); |
560 | ||
fdba5aa5 FB |
561 | switch (state) { |
562 | case USB_STATE_DEFAULT: | |
72246da4 | 563 | return -EINVAL; |
72246da4 | 564 | |
fdba5aa5 | 565 | case USB_STATE_ADDRESS: |
72246da4 FB |
566 | ret = dwc3_ep0_delegate_req(dwc, ctrl); |
567 | /* if the cfg matches and the cfg is non zero */ | |
457e84b6 | 568 | if (cfg && (!ret || (ret == USB_GADGET_DELAYED_STATUS))) { |
7c81290e FB |
569 | |
570 | /* | |
571 | * only change state if set_config has already | |
572 | * been processed. If gadget driver returns | |
573 | * USB_GADGET_DELAYED_STATUS, we will wait | |
574 | * to change the state on the next usb_ep_queue() | |
575 | */ | |
576 | if (ret == 0) | |
577 | usb_gadget_set_state(&dwc->gadget, | |
578 | USB_STATE_CONFIGURED); | |
14cd592f | 579 | |
e274a31e PA |
580 | /* |
581 | * Enable transition to U1/U2 state when | |
582 | * nothing is pending from application. | |
583 | */ | |
584 | reg = dwc3_readl(dwc->regs, DWC3_DCTL); | |
585 | reg |= (DWC3_DCTL_ACCEPTU1ENA | DWC3_DCTL_ACCEPTU2ENA); | |
586 | dwc3_writel(dwc->regs, DWC3_DCTL, reg); | |
587 | ||
457e84b6 | 588 | dwc->resize_fifos = true; |
2c4cbe6e | 589 | dwc3_trace(trace_dwc3_ep0, "resize FIFOs flag SET"); |
457e84b6 | 590 | } |
72246da4 FB |
591 | break; |
592 | ||
fdba5aa5 | 593 | case USB_STATE_CONFIGURED: |
72246da4 | 594 | ret = dwc3_ep0_delegate_req(dwc, ctrl); |
7a42d835 | 595 | if (!cfg && !ret) |
14cd592f FB |
596 | usb_gadget_set_state(&dwc->gadget, |
597 | USB_STATE_ADDRESS); | |
72246da4 | 598 | break; |
5bdb1dcc SAS |
599 | default: |
600 | ret = -EINVAL; | |
72246da4 | 601 | } |
5bdb1dcc | 602 | return ret; |
72246da4 FB |
603 | } |
604 | ||
865e09e7 FB |
605 | static void dwc3_ep0_set_sel_cmpl(struct usb_ep *ep, struct usb_request *req) |
606 | { | |
607 | struct dwc3_ep *dep = to_dwc3_ep(ep); | |
608 | struct dwc3 *dwc = dep->dwc; | |
609 | ||
610 | u32 param = 0; | |
611 | u32 reg; | |
612 | ||
613 | struct timing { | |
614 | u8 u1sel; | |
615 | u8 u1pel; | |
616 | u16 u2sel; | |
617 | u16 u2pel; | |
618 | } __packed timing; | |
619 | ||
620 | int ret; | |
621 | ||
622 | memcpy(&timing, req->buf, sizeof(timing)); | |
623 | ||
624 | dwc->u1sel = timing.u1sel; | |
625 | dwc->u1pel = timing.u1pel; | |
c8cf7af4 FB |
626 | dwc->u2sel = le16_to_cpu(timing.u2sel); |
627 | dwc->u2pel = le16_to_cpu(timing.u2pel); | |
865e09e7 FB |
628 | |
629 | reg = dwc3_readl(dwc->regs, DWC3_DCTL); | |
630 | if (reg & DWC3_DCTL_INITU2ENA) | |
631 | param = dwc->u2pel; | |
632 | if (reg & DWC3_DCTL_INITU1ENA) | |
633 | param = dwc->u1pel; | |
634 | ||
635 | /* | |
636 | * According to Synopsys Databook, if parameter is | |
637 | * greater than 125, a value of zero should be | |
638 | * programmed in the register. | |
639 | */ | |
640 | if (param > 125) | |
641 | param = 0; | |
642 | ||
643 | /* now that we have the time, issue DGCMD Set Sel */ | |
644 | ret = dwc3_send_gadget_generic_command(dwc, | |
645 | DWC3_DGCMD_SET_PERIODIC_PAR, param); | |
646 | WARN_ON(ret < 0); | |
647 | } | |
648 | ||
649 | static int dwc3_ep0_set_sel(struct dwc3 *dwc, struct usb_ctrlrequest *ctrl) | |
650 | { | |
651 | struct dwc3_ep *dep; | |
fdba5aa5 | 652 | enum usb_device_state state = dwc->gadget.state; |
865e09e7 FB |
653 | u16 wLength; |
654 | u16 wValue; | |
655 | ||
fdba5aa5 | 656 | if (state == USB_STATE_DEFAULT) |
865e09e7 FB |
657 | return -EINVAL; |
658 | ||
659 | wValue = le16_to_cpu(ctrl->wValue); | |
660 | wLength = le16_to_cpu(ctrl->wLength); | |
661 | ||
662 | if (wLength != 6) { | |
663 | dev_err(dwc->dev, "Set SEL should be 6 bytes, got %d\n", | |
664 | wLength); | |
665 | return -EINVAL; | |
666 | } | |
667 | ||
668 | /* | |
669 | * To handle Set SEL we need to receive 6 bytes from Host. So let's | |
670 | * queue a usb_request for 6 bytes. | |
671 | * | |
672 | * Remember, though, this controller can't handle non-wMaxPacketSize | |
673 | * aligned transfers on the OUT direction, so we queue a request for | |
674 | * wMaxPacketSize instead. | |
675 | */ | |
676 | dep = dwc->eps[0]; | |
677 | dwc->ep0_usb_req.dep = dep; | |
678 | dwc->ep0_usb_req.request.length = dep->endpoint.maxpacket; | |
679 | dwc->ep0_usb_req.request.buf = dwc->setup_buf; | |
680 | dwc->ep0_usb_req.request.complete = dwc3_ep0_set_sel_cmpl; | |
681 | ||
682 | return __dwc3_gadget_ep0_queue(dep, &dwc->ep0_usb_req); | |
683 | } | |
684 | ||
c12a0d86 FB |
685 | static int dwc3_ep0_set_isoch_delay(struct dwc3 *dwc, struct usb_ctrlrequest *ctrl) |
686 | { | |
687 | u16 wLength; | |
688 | u16 wValue; | |
689 | u16 wIndex; | |
690 | ||
691 | wValue = le16_to_cpu(ctrl->wValue); | |
692 | wLength = le16_to_cpu(ctrl->wLength); | |
693 | wIndex = le16_to_cpu(ctrl->wIndex); | |
694 | ||
695 | if (wIndex || wLength) | |
696 | return -EINVAL; | |
697 | ||
698 | /* | |
699 | * REVISIT It's unclear from Databook what to do with this | |
700 | * value. For now, just cache it. | |
701 | */ | |
702 | dwc->isoch_delay = wValue; | |
703 | ||
704 | return 0; | |
705 | } | |
706 | ||
72246da4 FB |
707 | static int dwc3_ep0_std_request(struct dwc3 *dwc, struct usb_ctrlrequest *ctrl) |
708 | { | |
709 | int ret; | |
710 | ||
711 | switch (ctrl->bRequest) { | |
712 | case USB_REQ_GET_STATUS: | |
dab716cd | 713 | dwc3_trace(trace_dwc3_ep0, "USB_REQ_GET_STATUS"); |
72246da4 FB |
714 | ret = dwc3_ep0_handle_status(dwc, ctrl); |
715 | break; | |
716 | case USB_REQ_CLEAR_FEATURE: | |
dab716cd | 717 | dwc3_trace(trace_dwc3_ep0, "USB_REQ_CLEAR_FEATURE"); |
72246da4 FB |
718 | ret = dwc3_ep0_handle_feature(dwc, ctrl, 0); |
719 | break; | |
720 | case USB_REQ_SET_FEATURE: | |
dab716cd | 721 | dwc3_trace(trace_dwc3_ep0, "USB_REQ_SET_FEATURE"); |
72246da4 FB |
722 | ret = dwc3_ep0_handle_feature(dwc, ctrl, 1); |
723 | break; | |
724 | case USB_REQ_SET_ADDRESS: | |
dab716cd | 725 | dwc3_trace(trace_dwc3_ep0, "USB_REQ_SET_ADDRESS"); |
72246da4 FB |
726 | ret = dwc3_ep0_set_address(dwc, ctrl); |
727 | break; | |
728 | case USB_REQ_SET_CONFIGURATION: | |
dab716cd | 729 | dwc3_trace(trace_dwc3_ep0, "USB_REQ_SET_CONFIGURATION"); |
72246da4 FB |
730 | ret = dwc3_ep0_set_config(dwc, ctrl); |
731 | break; | |
865e09e7 | 732 | case USB_REQ_SET_SEL: |
dab716cd | 733 | dwc3_trace(trace_dwc3_ep0, "USB_REQ_SET_SEL"); |
865e09e7 FB |
734 | ret = dwc3_ep0_set_sel(dwc, ctrl); |
735 | break; | |
c12a0d86 | 736 | case USB_REQ_SET_ISOCH_DELAY: |
dab716cd | 737 | dwc3_trace(trace_dwc3_ep0, "USB_REQ_SET_ISOCH_DELAY"); |
c12a0d86 FB |
738 | ret = dwc3_ep0_set_isoch_delay(dwc, ctrl); |
739 | break; | |
aebda618 JY |
740 | case USB_REQ_SET_INTERFACE: |
741 | dwc3_trace(trace_dwc3_ep0, "USB_REQ_SET_INTERFACE"); | |
742 | dwc->start_config_issued = false; | |
743 | /* Fall through */ | |
72246da4 | 744 | default: |
dab716cd | 745 | dwc3_trace(trace_dwc3_ep0, "Forwarding to gadget driver"); |
72246da4 FB |
746 | ret = dwc3_ep0_delegate_req(dwc, ctrl); |
747 | break; | |
2b84f92b | 748 | } |
72246da4 FB |
749 | |
750 | return ret; | |
751 | } | |
752 | ||
753 | static void dwc3_ep0_inspect_setup(struct dwc3 *dwc, | |
754 | const struct dwc3_event_depevt *event) | |
755 | { | |
756 | struct usb_ctrlrequest *ctrl = dwc->ctrl_req; | |
ef21ede6 | 757 | int ret = -EINVAL; |
72246da4 FB |
758 | u32 len; |
759 | ||
760 | if (!dwc->gadget_driver) | |
ef21ede6 | 761 | goto out; |
72246da4 | 762 | |
2c4cbe6e FB |
763 | trace_dwc3_ctrl_req(ctrl); |
764 | ||
72246da4 | 765 | len = le16_to_cpu(ctrl->wLength); |
1ddcb218 | 766 | if (!len) { |
d95b09b9 FB |
767 | dwc->three_stage_setup = false; |
768 | dwc->ep0_expect_in = false; | |
1ddcb218 FB |
769 | dwc->ep0_next_event = DWC3_EP0_NRDY_STATUS; |
770 | } else { | |
d95b09b9 FB |
771 | dwc->three_stage_setup = true; |
772 | dwc->ep0_expect_in = !!(ctrl->bRequestType & USB_DIR_IN); | |
1ddcb218 FB |
773 | dwc->ep0_next_event = DWC3_EP0_NRDY_DATA; |
774 | } | |
72246da4 FB |
775 | |
776 | if ((ctrl->bRequestType & USB_TYPE_MASK) == USB_TYPE_STANDARD) | |
777 | ret = dwc3_ep0_std_request(dwc, ctrl); | |
778 | else | |
779 | ret = dwc3_ep0_delegate_req(dwc, ctrl); | |
780 | ||
5bdb1dcc SAS |
781 | if (ret == USB_GADGET_DELAYED_STATUS) |
782 | dwc->delayed_status = true; | |
783 | ||
ef21ede6 FB |
784 | out: |
785 | if (ret < 0) | |
786 | dwc3_ep0_stall_and_restart(dwc); | |
72246da4 FB |
787 | } |
788 | ||
789 | static void dwc3_ep0_complete_data(struct dwc3 *dwc, | |
790 | const struct dwc3_event_depevt *event) | |
791 | { | |
792 | struct dwc3_request *r = NULL; | |
793 | struct usb_request *ur; | |
f6bafc6a | 794 | struct dwc3_trb *trb; |
c2da2ff0 | 795 | struct dwc3_ep *ep0; |
8a344220 KVA |
796 | unsigned transfer_size = 0; |
797 | unsigned maxp; | |
798 | unsigned remaining_ur_length; | |
799 | void *buf; | |
800 | u32 transferred = 0; | |
fca8892a | 801 | u32 status; |
f6bafc6a | 802 | u32 length; |
72246da4 FB |
803 | u8 epnum; |
804 | ||
805 | epnum = event->endpoint_number; | |
c2da2ff0 | 806 | ep0 = dwc->eps[0]; |
72246da4 | 807 | |
1ddcb218 FB |
808 | dwc->ep0_next_event = DWC3_EP0_NRDY_STATUS; |
809 | ||
f6bafc6a | 810 | trb = dwc->ep0_trb; |
fca8892a | 811 | |
ccb072de FB |
812 | trace_dwc3_complete_trb(ep0, trb); |
813 | ||
520fe763 FB |
814 | r = next_request(&ep0->request_list); |
815 | if (!r) | |
816 | return; | |
817 | ||
fca8892a FB |
818 | status = DWC3_TRB_SIZE_TRBSTS(trb->size); |
819 | if (status == DWC3_TRBSTS_SETUP_PENDING) { | |
2c4cbe6e | 820 | dwc3_trace(trace_dwc3_ep0, "Setup Pending received"); |
fca8892a FB |
821 | |
822 | if (r) | |
823 | dwc3_gadget_giveback(ep0, r, -ECONNRESET); | |
824 | ||
825 | return; | |
826 | } | |
827 | ||
6856d30c | 828 | ur = &r->request; |
8a344220 KVA |
829 | buf = ur->buf; |
830 | remaining_ur_length = ur->length; | |
6856d30c | 831 | |
f6bafc6a | 832 | length = trb->size & DWC3_TRB_SIZE_MASK; |
72246da4 | 833 | |
8a344220 KVA |
834 | maxp = ep0->endpoint.maxpacket; |
835 | ||
a6829706 | 836 | if (dwc->ep0_bounced) { |
c0bd5456 KVA |
837 | /* |
838 | * Handle the first TRB before handling the bounce buffer if | |
839 | * the request length is greater than the bounce buffer size | |
840 | */ | |
841 | if (ur->length > DWC3_EP0_BOUNCE_SIZE) { | |
842 | transfer_size = ALIGN(ur->length - maxp, maxp); | |
843 | transferred = transfer_size - length; | |
844 | buf = (u8 *)buf + transferred; | |
845 | ur->actual += transferred; | |
846 | remaining_ur_length -= transferred; | |
847 | ||
848 | trb++; | |
849 | length = trb->size & DWC3_TRB_SIZE_MASK; | |
850 | ||
851 | ep0->free_slot = 0; | |
852 | } | |
853 | ||
8a344220 KVA |
854 | transfer_size = roundup((ur->length - transfer_size), |
855 | maxp); | |
b2fb5b1a | 856 | |
8a344220 KVA |
857 | transferred = min_t(u32, remaining_ur_length, |
858 | transfer_size - length); | |
859 | memcpy(buf, dwc->ep0_bounce, transferred); | |
a6829706 | 860 | } else { |
f6bafc6a | 861 | transferred = ur->length - length; |
a6829706 | 862 | } |
72246da4 | 863 | |
cd423dd3 FB |
864 | ur->actual += transferred; |
865 | ||
72246da4 FB |
866 | if ((epnum & 1) && ur->actual < ur->length) { |
867 | /* for some reason we did not get everything out */ | |
868 | ||
869 | dwc3_ep0_stall_and_restart(dwc); | |
72246da4 | 870 | } else { |
36f84ffb FB |
871 | dwc3_gadget_giveback(ep0, r, 0); |
872 | ||
873 | if (IS_ALIGNED(ur->length, ep0->endpoint.maxpacket) && | |
874 | ur->length && ur->zero) { | |
875 | int ret; | |
876 | ||
877 | dwc->ep0_next_event = DWC3_EP0_COMPLETE; | |
878 | ||
879 | ret = dwc3_ep0_start_trans(dwc, epnum, | |
880 | dwc->ctrl_req_addr, 0, | |
368ca113 | 881 | DWC3_TRBCTL_CONTROL_DATA, false); |
36f84ffb FB |
882 | WARN_ON(ret < 0); |
883 | } | |
72246da4 FB |
884 | } |
885 | } | |
886 | ||
85a78101 | 887 | static void dwc3_ep0_complete_status(struct dwc3 *dwc, |
72246da4 FB |
888 | const struct dwc3_event_depevt *event) |
889 | { | |
890 | struct dwc3_request *r; | |
891 | struct dwc3_ep *dep; | |
fca8892a FB |
892 | struct dwc3_trb *trb; |
893 | u32 status; | |
72246da4 | 894 | |
c7fcdeb2 | 895 | dep = dwc->eps[0]; |
fca8892a | 896 | trb = dwc->ep0_trb; |
72246da4 | 897 | |
ccb072de FB |
898 | trace_dwc3_complete_trb(dep, trb); |
899 | ||
72246da4 FB |
900 | if (!list_empty(&dep->request_list)) { |
901 | r = next_request(&dep->request_list); | |
902 | ||
903 | dwc3_gadget_giveback(dep, r, 0); | |
904 | } | |
905 | ||
3b637367 GC |
906 | if (dwc->test_mode) { |
907 | int ret; | |
908 | ||
909 | ret = dwc3_gadget_set_test_mode(dwc, dwc->test_mode_nr); | |
910 | if (ret < 0) { | |
2c4cbe6e | 911 | dwc3_trace(trace_dwc3_ep0, "Invalid Test #%d", |
3b637367 GC |
912 | dwc->test_mode_nr); |
913 | dwc3_ep0_stall_and_restart(dwc); | |
5c81abab | 914 | return; |
3b637367 GC |
915 | } |
916 | } | |
917 | ||
fca8892a FB |
918 | status = DWC3_TRB_SIZE_TRBSTS(trb->size); |
919 | if (status == DWC3_TRBSTS_SETUP_PENDING) | |
dab716cd | 920 | dwc3_trace(trace_dwc3_ep0, "Setup Pending received"); |
fca8892a | 921 | |
c7fcdeb2 | 922 | dwc->ep0state = EP0_SETUP_PHASE; |
72246da4 FB |
923 | dwc3_ep0_out_start(dwc); |
924 | } | |
925 | ||
926 | static void dwc3_ep0_xfer_complete(struct dwc3 *dwc, | |
927 | const struct dwc3_event_depevt *event) | |
928 | { | |
c7fcdeb2 FB |
929 | struct dwc3_ep *dep = dwc->eps[event->endpoint_number]; |
930 | ||
931 | dep->flags &= ~DWC3_EP_BUSY; | |
b4996a86 | 932 | dep->resource_index = 0; |
df62df56 | 933 | dwc->setup_packet_pending = false; |
c7fcdeb2 | 934 | |
72246da4 | 935 | switch (dwc->ep0state) { |
c7fcdeb2 | 936 | case EP0_SETUP_PHASE: |
2c4cbe6e | 937 | dwc3_trace(trace_dwc3_ep0, "Setup Phase"); |
72246da4 FB |
938 | dwc3_ep0_inspect_setup(dwc, event); |
939 | break; | |
940 | ||
c7fcdeb2 | 941 | case EP0_DATA_PHASE: |
2c4cbe6e | 942 | dwc3_trace(trace_dwc3_ep0, "Data Phase"); |
72246da4 FB |
943 | dwc3_ep0_complete_data(dwc, event); |
944 | break; | |
945 | ||
c7fcdeb2 | 946 | case EP0_STATUS_PHASE: |
2c4cbe6e | 947 | dwc3_trace(trace_dwc3_ep0, "Status Phase"); |
85a78101 | 948 | dwc3_ep0_complete_status(dwc, event); |
72246da4 | 949 | break; |
c7fcdeb2 FB |
950 | default: |
951 | WARN(true, "UNKNOWN ep0state %d\n", dwc->ep0state); | |
952 | } | |
953 | } | |
72246da4 | 954 | |
a0807881 FB |
955 | static void __dwc3_ep0_do_control_data(struct dwc3 *dwc, |
956 | struct dwc3_ep *dep, struct dwc3_request *req) | |
c7fcdeb2 | 957 | { |
c7fcdeb2 FB |
958 | int ret; |
959 | ||
a0807881 | 960 | req->direction = !!dep->number; |
c7fcdeb2 | 961 | |
c7fcdeb2 | 962 | if (req->request.length == 0) { |
a0807881 | 963 | ret = dwc3_ep0_start_trans(dwc, dep->number, |
c7fcdeb2 | 964 | dwc->ctrl_req_addr, 0, |
368ca113 | 965 | DWC3_TRBCTL_CONTROL_DATA, false); |
c74c6d4a | 966 | } else if (!IS_ALIGNED(req->request.length, dep->endpoint.maxpacket) |
a0807881 | 967 | && (dep->number == 0)) { |
8a344220 | 968 | u32 transfer_size = 0; |
c390b036 | 969 | u32 maxpacket; |
a0807881 | 970 | |
0fc9a1be | 971 | ret = usb_gadget_map_request(&dwc->gadget, &req->request, |
a0807881 | 972 | dep->number); |
0fc9a1be FB |
973 | if (ret) { |
974 | dev_dbg(dwc->dev, "failed to map request\n"); | |
975 | return; | |
976 | } | |
c7fcdeb2 | 977 | |
c390b036 | 978 | maxpacket = dep->endpoint.maxpacket; |
a0807881 | 979 | |
c0bd5456 KVA |
980 | if (req->request.length > DWC3_EP0_BOUNCE_SIZE) { |
981 | transfer_size = ALIGN(req->request.length - maxpacket, | |
982 | maxpacket); | |
983 | ret = dwc3_ep0_start_trans(dwc, dep->number, | |
984 | req->request.dma, | |
985 | transfer_size, | |
986 | DWC3_TRBCTL_CONTROL_DATA, | |
987 | true); | |
b2fb5b1a KVA |
988 | } |
989 | ||
c0bd5456 KVA |
990 | transfer_size = roundup((req->request.length - transfer_size), |
991 | maxpacket); | |
992 | ||
c7fcdeb2 FB |
993 | dwc->ep0_bounced = true; |
994 | ||
a0807881 FB |
995 | ret = dwc3_ep0_start_trans(dwc, dep->number, |
996 | dwc->ep0_bounce_addr, transfer_size, | |
368ca113 | 997 | DWC3_TRBCTL_CONTROL_DATA, false); |
c7fcdeb2 | 998 | } else { |
0fc9a1be | 999 | ret = usb_gadget_map_request(&dwc->gadget, &req->request, |
a0807881 | 1000 | dep->number); |
0fc9a1be FB |
1001 | if (ret) { |
1002 | dev_dbg(dwc->dev, "failed to map request\n"); | |
1003 | return; | |
1004 | } | |
c7fcdeb2 | 1005 | |
a0807881 | 1006 | ret = dwc3_ep0_start_trans(dwc, dep->number, req->request.dma, |
368ca113 KVA |
1007 | req->request.length, DWC3_TRBCTL_CONTROL_DATA, |
1008 | false); | |
c7fcdeb2 FB |
1009 | } |
1010 | ||
1011 | WARN_ON(ret < 0); | |
72246da4 FB |
1012 | } |
1013 | ||
f0f2b2a2 | 1014 | static int dwc3_ep0_start_control_status(struct dwc3_ep *dep) |
72246da4 | 1015 | { |
f0f2b2a2 | 1016 | struct dwc3 *dwc = dep->dwc; |
c7fcdeb2 | 1017 | u32 type; |
72246da4 | 1018 | |
c7fcdeb2 FB |
1019 | type = dwc->three_stage_setup ? DWC3_TRBCTL_CONTROL_STATUS3 |
1020 | : DWC3_TRBCTL_CONTROL_STATUS2; | |
1021 | ||
f0f2b2a2 | 1022 | return dwc3_ep0_start_trans(dwc, dep->number, |
368ca113 | 1023 | dwc->ctrl_req_addr, 0, type, false); |
f0f2b2a2 | 1024 | } |
c7fcdeb2 | 1025 | |
788a23f4 | 1026 | static void __dwc3_ep0_do_control_status(struct dwc3 *dwc, struct dwc3_ep *dep) |
f0f2b2a2 | 1027 | { |
457e84b6 | 1028 | if (dwc->resize_fifos) { |
2c4cbe6e | 1029 | dwc3_trace(trace_dwc3_ep0, "Resizing FIFOs"); |
457e84b6 FB |
1030 | dwc3_gadget_resize_tx_fifos(dwc); |
1031 | dwc->resize_fifos = 0; | |
1032 | } | |
1033 | ||
f0f2b2a2 | 1034 | WARN_ON(dwc3_ep0_start_control_status(dep)); |
c7fcdeb2 FB |
1035 | } |
1036 | ||
788a23f4 FB |
1037 | static void dwc3_ep0_do_control_status(struct dwc3 *dwc, |
1038 | const struct dwc3_event_depevt *event) | |
1039 | { | |
1040 | struct dwc3_ep *dep = dwc->eps[event->endpoint_number]; | |
1041 | ||
1042 | __dwc3_ep0_do_control_status(dwc, dep); | |
1043 | } | |
1044 | ||
2e3db064 FB |
1045 | static void dwc3_ep0_end_control_data(struct dwc3 *dwc, struct dwc3_ep *dep) |
1046 | { | |
1047 | struct dwc3_gadget_ep_cmd_params params; | |
1048 | u32 cmd; | |
1049 | int ret; | |
1050 | ||
1051 | if (!dep->resource_index) | |
1052 | return; | |
1053 | ||
1054 | cmd = DWC3_DEPCMD_ENDTRANSFER; | |
1055 | cmd |= DWC3_DEPCMD_CMDIOC; | |
1056 | cmd |= DWC3_DEPCMD_PARAM(dep->resource_index); | |
1057 | memset(¶ms, 0, sizeof(params)); | |
1058 | ret = dwc3_send_gadget_ep_cmd(dwc, dep->number, cmd, ¶ms); | |
1059 | WARN_ON_ONCE(ret); | |
1060 | dep->resource_index = 0; | |
1061 | } | |
1062 | ||
c7fcdeb2 FB |
1063 | static void dwc3_ep0_xfernotready(struct dwc3 *dwc, |
1064 | const struct dwc3_event_depevt *event) | |
1065 | { | |
df62df56 FB |
1066 | dwc->setup_packet_pending = true; |
1067 | ||
c7fcdeb2 | 1068 | switch (event->status) { |
c7fcdeb2 | 1069 | case DEPEVT_STATUS_CONTROL_DATA: |
2c4cbe6e | 1070 | dwc3_trace(trace_dwc3_ep0, "Control Data"); |
1ddcb218 | 1071 | |
55f3fba6 | 1072 | /* |
2e3db064 FB |
1073 | * We already have a DATA transfer in the controller's cache, |
1074 | * if we receive a XferNotReady(DATA) we will ignore it, unless | |
1075 | * it's for the wrong direction. | |
55f3fba6 | 1076 | * |
2e3db064 FB |
1077 | * In that case, we must issue END_TRANSFER command to the Data |
1078 | * Phase we already have started and issue SetStall on the | |
1079 | * control endpoint. | |
55f3fba6 FB |
1080 | */ |
1081 | if (dwc->ep0_expect_in != event->endpoint_number) { | |
2e3db064 FB |
1082 | struct dwc3_ep *dep = dwc->eps[dwc->ep0_expect_in]; |
1083 | ||
2c4cbe6e FB |
1084 | dwc3_trace(trace_dwc3_ep0, |
1085 | "Wrong direction for Data phase"); | |
2e3db064 | 1086 | dwc3_ep0_end_control_data(dwc, dep); |
55f3fba6 FB |
1087 | dwc3_ep0_stall_and_restart(dwc); |
1088 | return; | |
1089 | } | |
1090 | ||
c7fcdeb2 | 1091 | break; |
1ddcb218 | 1092 | |
c7fcdeb2 | 1093 | case DEPEVT_STATUS_CONTROL_STATUS: |
77fa6df8 FB |
1094 | if (dwc->ep0_next_event != DWC3_EP0_NRDY_STATUS) |
1095 | return; | |
1096 | ||
2c4cbe6e | 1097 | dwc3_trace(trace_dwc3_ep0, "Control Status"); |
1ddcb218 | 1098 | |
f0f2b2a2 SAS |
1099 | dwc->ep0state = EP0_STATUS_PHASE; |
1100 | ||
5bdb1dcc SAS |
1101 | if (dwc->delayed_status) { |
1102 | WARN_ON_ONCE(event->endpoint_number != 1); | |
2c4cbe6e | 1103 | dwc3_trace(trace_dwc3_ep0, "Delayed Status"); |
5bdb1dcc SAS |
1104 | return; |
1105 | } | |
1106 | ||
788a23f4 | 1107 | dwc3_ep0_do_control_status(dwc, event); |
72246da4 FB |
1108 | } |
1109 | } | |
1110 | ||
1111 | void dwc3_ep0_interrupt(struct dwc3 *dwc, | |
8becf270 | 1112 | const struct dwc3_event_depevt *event) |
72246da4 FB |
1113 | { |
1114 | u8 epnum = event->endpoint_number; | |
1115 | ||
2c4cbe6e | 1116 | dwc3_trace(trace_dwc3_ep0, "%s while ep%d%s in state '%s'", |
72246da4 | 1117 | dwc3_ep_event_string(event->endpoint_event), |
b147f357 | 1118 | epnum >> 1, (epnum & 1) ? "in" : "out", |
72246da4 FB |
1119 | dwc3_ep0_state_string(dwc->ep0state)); |
1120 | ||
1121 | switch (event->endpoint_event) { | |
1122 | case DWC3_DEPEVT_XFERCOMPLETE: | |
1123 | dwc3_ep0_xfer_complete(dwc, event); | |
1124 | break; | |
1125 | ||
1126 | case DWC3_DEPEVT_XFERNOTREADY: | |
1127 | dwc3_ep0_xfernotready(dwc, event); | |
1128 | break; | |
1129 | ||
1130 | case DWC3_DEPEVT_XFERINPROGRESS: | |
1131 | case DWC3_DEPEVT_RXTXFIFOEVT: | |
1132 | case DWC3_DEPEVT_STREAMEVT: | |
1133 | case DWC3_DEPEVT_EPCMDCMPLT: | |
1134 | break; | |
1135 | } | |
1136 | } |