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72246da4 FB |
1 | /** |
2 | * gadget.c - DesignWare USB3 DRD Controller Gadget Framework Link | |
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/delay.h> | |
21 | #include <linux/slab.h> | |
22 | #include <linux/spinlock.h> | |
23 | #include <linux/platform_device.h> | |
24 | #include <linux/pm_runtime.h> | |
25 | #include <linux/interrupt.h> | |
26 | #include <linux/io.h> | |
27 | #include <linux/list.h> | |
28 | #include <linux/dma-mapping.h> | |
29 | ||
30 | #include <linux/usb/ch9.h> | |
31 | #include <linux/usb/gadget.h> | |
32 | ||
80977dc9 | 33 | #include "debug.h" |
72246da4 FB |
34 | #include "core.h" |
35 | #include "gadget.h" | |
36 | #include "io.h" | |
37 | ||
04a9bfcd FB |
38 | /** |
39 | * dwc3_gadget_set_test_mode - Enables USB2 Test Modes | |
40 | * @dwc: pointer to our context structure | |
41 | * @mode: the mode to set (J, K SE0 NAK, Force Enable) | |
42 | * | |
43 | * Caller should take care of locking. This function will | |
44 | * return 0 on success or -EINVAL if wrong Test Selector | |
45 | * is passed | |
46 | */ | |
47 | int dwc3_gadget_set_test_mode(struct dwc3 *dwc, int mode) | |
48 | { | |
49 | u32 reg; | |
50 | ||
51 | reg = dwc3_readl(dwc->regs, DWC3_DCTL); | |
52 | reg &= ~DWC3_DCTL_TSTCTRL_MASK; | |
53 | ||
54 | switch (mode) { | |
55 | case TEST_J: | |
56 | case TEST_K: | |
57 | case TEST_SE0_NAK: | |
58 | case TEST_PACKET: | |
59 | case TEST_FORCE_EN: | |
60 | reg |= mode << 1; | |
61 | break; | |
62 | default: | |
63 | return -EINVAL; | |
64 | } | |
65 | ||
66 | dwc3_writel(dwc->regs, DWC3_DCTL, reg); | |
67 | ||
68 | return 0; | |
69 | } | |
70 | ||
911f1f88 PZ |
71 | /** |
72 | * dwc3_gadget_get_link_state - Gets current state of USB Link | |
73 | * @dwc: pointer to our context structure | |
74 | * | |
75 | * Caller should take care of locking. This function will | |
76 | * return the link state on success (>= 0) or -ETIMEDOUT. | |
77 | */ | |
78 | int dwc3_gadget_get_link_state(struct dwc3 *dwc) | |
79 | { | |
80 | u32 reg; | |
81 | ||
82 | reg = dwc3_readl(dwc->regs, DWC3_DSTS); | |
83 | ||
84 | return DWC3_DSTS_USBLNKST(reg); | |
85 | } | |
86 | ||
8598bde7 FB |
87 | /** |
88 | * dwc3_gadget_set_link_state - Sets USB Link to a particular State | |
89 | * @dwc: pointer to our context structure | |
90 | * @state: the state to put link into | |
91 | * | |
92 | * Caller should take care of locking. This function will | |
aee63e3c | 93 | * return 0 on success or -ETIMEDOUT. |
8598bde7 FB |
94 | */ |
95 | int dwc3_gadget_set_link_state(struct dwc3 *dwc, enum dwc3_link_state state) | |
96 | { | |
aee63e3c | 97 | int retries = 10000; |
8598bde7 FB |
98 | u32 reg; |
99 | ||
802fde98 PZ |
100 | /* |
101 | * Wait until device controller is ready. Only applies to 1.94a and | |
102 | * later RTL. | |
103 | */ | |
104 | if (dwc->revision >= DWC3_REVISION_194A) { | |
105 | while (--retries) { | |
106 | reg = dwc3_readl(dwc->regs, DWC3_DSTS); | |
107 | if (reg & DWC3_DSTS_DCNRD) | |
108 | udelay(5); | |
109 | else | |
110 | break; | |
111 | } | |
112 | ||
113 | if (retries <= 0) | |
114 | return -ETIMEDOUT; | |
115 | } | |
116 | ||
8598bde7 FB |
117 | reg = dwc3_readl(dwc->regs, DWC3_DCTL); |
118 | reg &= ~DWC3_DCTL_ULSTCHNGREQ_MASK; | |
119 | ||
120 | /* set requested state */ | |
121 | reg |= DWC3_DCTL_ULSTCHNGREQ(state); | |
122 | dwc3_writel(dwc->regs, DWC3_DCTL, reg); | |
123 | ||
802fde98 PZ |
124 | /* |
125 | * The following code is racy when called from dwc3_gadget_wakeup, | |
126 | * and is not needed, at least on newer versions | |
127 | */ | |
128 | if (dwc->revision >= DWC3_REVISION_194A) | |
129 | return 0; | |
130 | ||
8598bde7 | 131 | /* wait for a change in DSTS */ |
aed430e5 | 132 | retries = 10000; |
8598bde7 FB |
133 | while (--retries) { |
134 | reg = dwc3_readl(dwc->regs, DWC3_DSTS); | |
135 | ||
8598bde7 FB |
136 | if (DWC3_DSTS_USBLNKST(reg) == state) |
137 | return 0; | |
138 | ||
aee63e3c | 139 | udelay(5); |
8598bde7 FB |
140 | } |
141 | ||
73815280 FB |
142 | dwc3_trace(trace_dwc3_gadget, |
143 | "link state change request timed out"); | |
8598bde7 FB |
144 | |
145 | return -ETIMEDOUT; | |
146 | } | |
147 | ||
dca0119c JY |
148 | /** |
149 | * dwc3_ep_inc_trb() - Increment a TRB index. | |
150 | * @index - Pointer to the TRB index to increment. | |
151 | * | |
152 | * The index should never point to the link TRB. After incrementing, | |
153 | * if it is point to the link TRB, wrap around to the beginning. The | |
154 | * link TRB is always at the last TRB entry. | |
155 | */ | |
156 | static void dwc3_ep_inc_trb(u8 *index) | |
457e84b6 | 157 | { |
dca0119c JY |
158 | (*index)++; |
159 | if (*index == (DWC3_TRB_NUM - 1)) | |
160 | *index = 0; | |
ef966b9d | 161 | } |
457e84b6 | 162 | |
dca0119c | 163 | static void dwc3_ep_inc_enq(struct dwc3_ep *dep) |
ef966b9d | 164 | { |
dca0119c | 165 | dwc3_ep_inc_trb(&dep->trb_enqueue); |
ef966b9d | 166 | } |
457e84b6 | 167 | |
dca0119c | 168 | static void dwc3_ep_inc_deq(struct dwc3_ep *dep) |
ef966b9d | 169 | { |
dca0119c | 170 | dwc3_ep_inc_trb(&dep->trb_dequeue); |
457e84b6 FB |
171 | } |
172 | ||
72246da4 FB |
173 | void dwc3_gadget_giveback(struct dwc3_ep *dep, struct dwc3_request *req, |
174 | int status) | |
175 | { | |
176 | struct dwc3 *dwc = dep->dwc; | |
e5ba5ec8 | 177 | int i; |
72246da4 | 178 | |
aa3342c8 | 179 | if (req->started) { |
e5ba5ec8 PA |
180 | i = 0; |
181 | do { | |
ef966b9d | 182 | dwc3_ep_inc_deq(dep); |
e5ba5ec8 | 183 | } while(++i < req->request.num_mapped_sgs); |
aa3342c8 | 184 | req->started = false; |
72246da4 FB |
185 | } |
186 | list_del(&req->list); | |
eeb720fb | 187 | req->trb = NULL; |
72246da4 FB |
188 | |
189 | if (req->request.status == -EINPROGRESS) | |
190 | req->request.status = status; | |
191 | ||
0416e494 PA |
192 | if (dwc->ep0_bounced && dep->number == 0) |
193 | dwc->ep0_bounced = false; | |
194 | else | |
195 | usb_gadget_unmap_request(&dwc->gadget, &req->request, | |
196 | req->direction); | |
72246da4 | 197 | |
2c4cbe6e | 198 | trace_dwc3_gadget_giveback(req); |
72246da4 FB |
199 | |
200 | spin_unlock(&dwc->lock); | |
304f7e5e | 201 | usb_gadget_giveback_request(&dep->endpoint, &req->request); |
72246da4 | 202 | spin_lock(&dwc->lock); |
fc8bb91b FB |
203 | |
204 | if (dep->number > 1) | |
205 | pm_runtime_put(dwc->dev); | |
72246da4 FB |
206 | } |
207 | ||
3ece0ec4 | 208 | int dwc3_send_gadget_generic_command(struct dwc3 *dwc, unsigned cmd, u32 param) |
b09bb642 FB |
209 | { |
210 | u32 timeout = 500; | |
71f7e702 | 211 | int status = 0; |
0fe886cd | 212 | int ret = 0; |
b09bb642 FB |
213 | u32 reg; |
214 | ||
215 | dwc3_writel(dwc->regs, DWC3_DGCMDPAR, param); | |
216 | dwc3_writel(dwc->regs, DWC3_DGCMD, cmd | DWC3_DGCMD_CMDACT); | |
217 | ||
218 | do { | |
219 | reg = dwc3_readl(dwc->regs, DWC3_DGCMD); | |
220 | if (!(reg & DWC3_DGCMD_CMDACT)) { | |
71f7e702 FB |
221 | status = DWC3_DGCMD_STATUS(reg); |
222 | if (status) | |
0fe886cd FB |
223 | ret = -EINVAL; |
224 | break; | |
b09bb642 | 225 | } |
0fe886cd FB |
226 | } while (timeout--); |
227 | ||
228 | if (!timeout) { | |
0fe886cd | 229 | ret = -ETIMEDOUT; |
71f7e702 | 230 | status = -ETIMEDOUT; |
0fe886cd FB |
231 | } |
232 | ||
71f7e702 FB |
233 | trace_dwc3_gadget_generic_cmd(cmd, param, status); |
234 | ||
0fe886cd | 235 | return ret; |
b09bb642 FB |
236 | } |
237 | ||
c36d8e94 FB |
238 | static int __dwc3_gadget_wakeup(struct dwc3 *dwc); |
239 | ||
2cd4718d FB |
240 | int dwc3_send_gadget_ep_cmd(struct dwc3_ep *dep, unsigned cmd, |
241 | struct dwc3_gadget_ep_cmd_params *params) | |
72246da4 | 242 | { |
2cd4718d | 243 | struct dwc3 *dwc = dep->dwc; |
61d58242 | 244 | u32 timeout = 500; |
72246da4 FB |
245 | u32 reg; |
246 | ||
0933df15 | 247 | int cmd_status = 0; |
2b0f11df | 248 | int susphy = false; |
c0ca324d | 249 | int ret = -EINVAL; |
72246da4 | 250 | |
2b0f11df FB |
251 | /* |
252 | * Synopsys Databook 2.60a states, on section 6.3.2.5.[1-8], that if | |
253 | * we're issuing an endpoint command, we must check if | |
254 | * GUSB2PHYCFG.SUSPHY bit is set. If it is, then we need to clear it. | |
255 | * | |
256 | * We will also set SUSPHY bit to what it was before returning as stated | |
257 | * by the same section on Synopsys databook. | |
258 | */ | |
ab2a92e7 FB |
259 | if (dwc->gadget.speed <= USB_SPEED_HIGH) { |
260 | reg = dwc3_readl(dwc->regs, DWC3_GUSB2PHYCFG(0)); | |
261 | if (unlikely(reg & DWC3_GUSB2PHYCFG_SUSPHY)) { | |
262 | susphy = true; | |
263 | reg &= ~DWC3_GUSB2PHYCFG_SUSPHY; | |
264 | dwc3_writel(dwc->regs, DWC3_GUSB2PHYCFG(0), reg); | |
265 | } | |
2b0f11df FB |
266 | } |
267 | ||
c36d8e94 FB |
268 | if (cmd == DWC3_DEPCMD_STARTTRANSFER) { |
269 | int needs_wakeup; | |
270 | ||
271 | needs_wakeup = (dwc->link_state == DWC3_LINK_STATE_U1 || | |
272 | dwc->link_state == DWC3_LINK_STATE_U2 || | |
273 | dwc->link_state == DWC3_LINK_STATE_U3); | |
274 | ||
275 | if (unlikely(needs_wakeup)) { | |
276 | ret = __dwc3_gadget_wakeup(dwc); | |
277 | dev_WARN_ONCE(dwc->dev, ret, "wakeup failed --> %d\n", | |
278 | ret); | |
279 | } | |
280 | } | |
281 | ||
2eb88016 FB |
282 | dwc3_writel(dep->regs, DWC3_DEPCMDPAR0, params->param0); |
283 | dwc3_writel(dep->regs, DWC3_DEPCMDPAR1, params->param1); | |
284 | dwc3_writel(dep->regs, DWC3_DEPCMDPAR2, params->param2); | |
72246da4 | 285 | |
2eb88016 | 286 | dwc3_writel(dep->regs, DWC3_DEPCMD, cmd | DWC3_DEPCMD_CMDACT); |
72246da4 | 287 | do { |
2eb88016 | 288 | reg = dwc3_readl(dep->regs, DWC3_DEPCMD); |
72246da4 | 289 | if (!(reg & DWC3_DEPCMD_CMDACT)) { |
0933df15 | 290 | cmd_status = DWC3_DEPCMD_STATUS(reg); |
7b9cc7a2 | 291 | |
7b9cc7a2 KL |
292 | switch (cmd_status) { |
293 | case 0: | |
294 | ret = 0; | |
295 | break; | |
296 | case DEPEVT_TRANSFER_NO_RESOURCE: | |
7b9cc7a2 | 297 | ret = -EINVAL; |
c0ca324d | 298 | break; |
7b9cc7a2 KL |
299 | case DEPEVT_TRANSFER_BUS_EXPIRY: |
300 | /* | |
301 | * SW issues START TRANSFER command to | |
302 | * isochronous ep with future frame interval. If | |
303 | * future interval time has already passed when | |
304 | * core receives the command, it will respond | |
305 | * with an error status of 'Bus Expiry'. | |
306 | * | |
307 | * Instead of always returning -EINVAL, let's | |
308 | * give a hint to the gadget driver that this is | |
309 | * the case by returning -EAGAIN. | |
310 | */ | |
7b9cc7a2 KL |
311 | ret = -EAGAIN; |
312 | break; | |
313 | default: | |
314 | dev_WARN(dwc->dev, "UNKNOWN cmd status\n"); | |
315 | } | |
316 | ||
c0ca324d | 317 | break; |
72246da4 | 318 | } |
f6bb225b | 319 | } while (--timeout); |
72246da4 | 320 | |
f6bb225b | 321 | if (timeout == 0) { |
f6bb225b | 322 | ret = -ETIMEDOUT; |
0933df15 | 323 | cmd_status = -ETIMEDOUT; |
f6bb225b | 324 | } |
c0ca324d | 325 | |
0933df15 FB |
326 | trace_dwc3_gadget_ep_cmd(dep, cmd, params, cmd_status); |
327 | ||
2b0f11df FB |
328 | if (unlikely(susphy)) { |
329 | reg = dwc3_readl(dwc->regs, DWC3_GUSB2PHYCFG(0)); | |
330 | reg |= DWC3_GUSB2PHYCFG_SUSPHY; | |
331 | dwc3_writel(dwc->regs, DWC3_GUSB2PHYCFG(0), reg); | |
332 | } | |
333 | ||
c0ca324d | 334 | return ret; |
72246da4 FB |
335 | } |
336 | ||
50c763f8 JY |
337 | static int dwc3_send_clear_stall_ep_cmd(struct dwc3_ep *dep) |
338 | { | |
339 | struct dwc3 *dwc = dep->dwc; | |
340 | struct dwc3_gadget_ep_cmd_params params; | |
341 | u32 cmd = DWC3_DEPCMD_CLEARSTALL; | |
342 | ||
343 | /* | |
344 | * As of core revision 2.60a the recommended programming model | |
345 | * is to set the ClearPendIN bit when issuing a Clear Stall EP | |
346 | * command for IN endpoints. This is to prevent an issue where | |
347 | * some (non-compliant) hosts may not send ACK TPs for pending | |
348 | * IN transfers due to a mishandled error condition. Synopsys | |
349 | * STAR 9000614252. | |
350 | */ | |
351 | if (dep->direction && (dwc->revision >= DWC3_REVISION_260A)) | |
352 | cmd |= DWC3_DEPCMD_CLEARPENDIN; | |
353 | ||
354 | memset(¶ms, 0, sizeof(params)); | |
355 | ||
2cd4718d | 356 | return dwc3_send_gadget_ep_cmd(dep, cmd, ¶ms); |
50c763f8 JY |
357 | } |
358 | ||
72246da4 | 359 | static dma_addr_t dwc3_trb_dma_offset(struct dwc3_ep *dep, |
f6bafc6a | 360 | struct dwc3_trb *trb) |
72246da4 | 361 | { |
c439ef87 | 362 | u32 offset = (char *) trb - (char *) dep->trb_pool; |
72246da4 FB |
363 | |
364 | return dep->trb_pool_dma + offset; | |
365 | } | |
366 | ||
367 | static int dwc3_alloc_trb_pool(struct dwc3_ep *dep) | |
368 | { | |
369 | struct dwc3 *dwc = dep->dwc; | |
370 | ||
371 | if (dep->trb_pool) | |
372 | return 0; | |
373 | ||
72246da4 FB |
374 | dep->trb_pool = dma_alloc_coherent(dwc->dev, |
375 | sizeof(struct dwc3_trb) * DWC3_TRB_NUM, | |
376 | &dep->trb_pool_dma, GFP_KERNEL); | |
377 | if (!dep->trb_pool) { | |
378 | dev_err(dep->dwc->dev, "failed to allocate trb pool for %s\n", | |
379 | dep->name); | |
380 | return -ENOMEM; | |
381 | } | |
382 | ||
383 | return 0; | |
384 | } | |
385 | ||
386 | static void dwc3_free_trb_pool(struct dwc3_ep *dep) | |
387 | { | |
388 | struct dwc3 *dwc = dep->dwc; | |
389 | ||
390 | dma_free_coherent(dwc->dev, sizeof(struct dwc3_trb) * DWC3_TRB_NUM, | |
391 | dep->trb_pool, dep->trb_pool_dma); | |
392 | ||
393 | dep->trb_pool = NULL; | |
394 | dep->trb_pool_dma = 0; | |
395 | } | |
396 | ||
c4509601 JY |
397 | static int dwc3_gadget_set_xfer_resource(struct dwc3 *dwc, struct dwc3_ep *dep); |
398 | ||
399 | /** | |
400 | * dwc3_gadget_start_config - Configure EP resources | |
401 | * @dwc: pointer to our controller context structure | |
402 | * @dep: endpoint that is being enabled | |
403 | * | |
404 | * The assignment of transfer resources cannot perfectly follow the | |
405 | * data book due to the fact that the controller driver does not have | |
406 | * all knowledge of the configuration in advance. It is given this | |
407 | * information piecemeal by the composite gadget framework after every | |
408 | * SET_CONFIGURATION and SET_INTERFACE. Trying to follow the databook | |
409 | * programming model in this scenario can cause errors. For two | |
410 | * reasons: | |
411 | * | |
412 | * 1) The databook says to do DEPSTARTCFG for every SET_CONFIGURATION | |
413 | * and SET_INTERFACE (8.1.5). This is incorrect in the scenario of | |
414 | * multiple interfaces. | |
415 | * | |
416 | * 2) The databook does not mention doing more DEPXFERCFG for new | |
417 | * endpoint on alt setting (8.1.6). | |
418 | * | |
419 | * The following simplified method is used instead: | |
420 | * | |
421 | * All hardware endpoints can be assigned a transfer resource and this | |
422 | * setting will stay persistent until either a core reset or | |
423 | * hibernation. So whenever we do a DEPSTARTCFG(0) we can go ahead and | |
424 | * do DEPXFERCFG for every hardware endpoint as well. We are | |
425 | * guaranteed that there are as many transfer resources as endpoints. | |
426 | * | |
427 | * This function is called for each endpoint when it is being enabled | |
428 | * but is triggered only when called for EP0-out, which always happens | |
429 | * first, and which should only happen in one of the above conditions. | |
430 | */ | |
72246da4 FB |
431 | static int dwc3_gadget_start_config(struct dwc3 *dwc, struct dwc3_ep *dep) |
432 | { | |
433 | struct dwc3_gadget_ep_cmd_params params; | |
434 | u32 cmd; | |
c4509601 JY |
435 | int i; |
436 | int ret; | |
437 | ||
438 | if (dep->number) | |
439 | return 0; | |
72246da4 FB |
440 | |
441 | memset(¶ms, 0x00, sizeof(params)); | |
c4509601 | 442 | cmd = DWC3_DEPCMD_DEPSTARTCFG; |
72246da4 | 443 | |
2cd4718d | 444 | ret = dwc3_send_gadget_ep_cmd(dep, cmd, ¶ms); |
c4509601 JY |
445 | if (ret) |
446 | return ret; | |
447 | ||
448 | for (i = 0; i < DWC3_ENDPOINTS_NUM; i++) { | |
449 | struct dwc3_ep *dep = dwc->eps[i]; | |
72246da4 | 450 | |
c4509601 JY |
451 | if (!dep) |
452 | continue; | |
453 | ||
454 | ret = dwc3_gadget_set_xfer_resource(dwc, dep); | |
455 | if (ret) | |
456 | return ret; | |
72246da4 FB |
457 | } |
458 | ||
459 | return 0; | |
460 | } | |
461 | ||
462 | static int dwc3_gadget_set_ep_config(struct dwc3 *dwc, struct dwc3_ep *dep, | |
c90bfaec | 463 | const struct usb_endpoint_descriptor *desc, |
4b345c9a | 464 | const struct usb_ss_ep_comp_descriptor *comp_desc, |
265b70a7 | 465 | bool ignore, bool restore) |
72246da4 FB |
466 | { |
467 | struct dwc3_gadget_ep_cmd_params params; | |
468 | ||
469 | memset(¶ms, 0x00, sizeof(params)); | |
470 | ||
dc1c70a7 | 471 | params.param0 = DWC3_DEPCFG_EP_TYPE(usb_endpoint_type(desc)) |
d2e9a13a CP |
472 | | DWC3_DEPCFG_MAX_PACKET_SIZE(usb_endpoint_maxp(desc)); |
473 | ||
474 | /* Burst size is only needed in SuperSpeed mode */ | |
ee5cd41c | 475 | if (dwc->gadget.speed >= USB_SPEED_SUPER) { |
676e3497 | 476 | u32 burst = dep->endpoint.maxburst; |
676e3497 | 477 | params.param0 |= DWC3_DEPCFG_BURST_SIZE(burst - 1); |
d2e9a13a | 478 | } |
72246da4 | 479 | |
4b345c9a FB |
480 | if (ignore) |
481 | params.param0 |= DWC3_DEPCFG_IGN_SEQ_NUM; | |
482 | ||
265b70a7 PZ |
483 | if (restore) { |
484 | params.param0 |= DWC3_DEPCFG_ACTION_RESTORE; | |
485 | params.param2 |= dep->saved_state; | |
486 | } | |
487 | ||
dc1c70a7 FB |
488 | params.param1 = DWC3_DEPCFG_XFER_COMPLETE_EN |
489 | | DWC3_DEPCFG_XFER_NOT_READY_EN; | |
72246da4 | 490 | |
18b7ede5 | 491 | if (usb_ss_max_streams(comp_desc) && usb_endpoint_xfer_bulk(desc)) { |
dc1c70a7 FB |
492 | params.param1 |= DWC3_DEPCFG_STREAM_CAPABLE |
493 | | DWC3_DEPCFG_STREAM_EVENT_EN; | |
879631aa FB |
494 | dep->stream_capable = true; |
495 | } | |
496 | ||
0b93a4c8 | 497 | if (!usb_endpoint_xfer_control(desc)) |
dc1c70a7 | 498 | params.param1 |= DWC3_DEPCFG_XFER_IN_PROGRESS_EN; |
72246da4 FB |
499 | |
500 | /* | |
501 | * We are doing 1:1 mapping for endpoints, meaning | |
502 | * Physical Endpoints 2 maps to Logical Endpoint 2 and | |
503 | * so on. We consider the direction bit as part of the physical | |
504 | * endpoint number. So USB endpoint 0x81 is 0x03. | |
505 | */ | |
dc1c70a7 | 506 | params.param1 |= DWC3_DEPCFG_EP_NUMBER(dep->number); |
72246da4 FB |
507 | |
508 | /* | |
509 | * We must use the lower 16 TX FIFOs even though | |
510 | * HW might have more | |
511 | */ | |
512 | if (dep->direction) | |
dc1c70a7 | 513 | params.param0 |= DWC3_DEPCFG_FIFO_NUMBER(dep->number >> 1); |
72246da4 FB |
514 | |
515 | if (desc->bInterval) { | |
dc1c70a7 | 516 | params.param1 |= DWC3_DEPCFG_BINTERVAL_M1(desc->bInterval - 1); |
72246da4 FB |
517 | dep->interval = 1 << (desc->bInterval - 1); |
518 | } | |
519 | ||
2cd4718d | 520 | return dwc3_send_gadget_ep_cmd(dep, DWC3_DEPCMD_SETEPCONFIG, ¶ms); |
72246da4 FB |
521 | } |
522 | ||
523 | static int dwc3_gadget_set_xfer_resource(struct dwc3 *dwc, struct dwc3_ep *dep) | |
524 | { | |
525 | struct dwc3_gadget_ep_cmd_params params; | |
526 | ||
527 | memset(¶ms, 0x00, sizeof(params)); | |
528 | ||
dc1c70a7 | 529 | params.param0 = DWC3_DEPXFERCFG_NUM_XFER_RES(1); |
72246da4 | 530 | |
2cd4718d FB |
531 | return dwc3_send_gadget_ep_cmd(dep, DWC3_DEPCMD_SETTRANSFRESOURCE, |
532 | ¶ms); | |
72246da4 FB |
533 | } |
534 | ||
535 | /** | |
536 | * __dwc3_gadget_ep_enable - Initializes a HW endpoint | |
537 | * @dep: endpoint to be initialized | |
538 | * @desc: USB Endpoint Descriptor | |
539 | * | |
540 | * Caller should take care of locking | |
541 | */ | |
542 | static int __dwc3_gadget_ep_enable(struct dwc3_ep *dep, | |
c90bfaec | 543 | const struct usb_endpoint_descriptor *desc, |
4b345c9a | 544 | const struct usb_ss_ep_comp_descriptor *comp_desc, |
265b70a7 | 545 | bool ignore, bool restore) |
72246da4 FB |
546 | { |
547 | struct dwc3 *dwc = dep->dwc; | |
548 | u32 reg; | |
b09e99ee | 549 | int ret; |
72246da4 | 550 | |
73815280 | 551 | dwc3_trace(trace_dwc3_gadget, "Enabling %s", dep->name); |
ff62d6b6 | 552 | |
72246da4 FB |
553 | if (!(dep->flags & DWC3_EP_ENABLED)) { |
554 | ret = dwc3_gadget_start_config(dwc, dep); | |
555 | if (ret) | |
556 | return ret; | |
557 | } | |
558 | ||
265b70a7 PZ |
559 | ret = dwc3_gadget_set_ep_config(dwc, dep, desc, comp_desc, ignore, |
560 | restore); | |
72246da4 FB |
561 | if (ret) |
562 | return ret; | |
563 | ||
564 | if (!(dep->flags & DWC3_EP_ENABLED)) { | |
f6bafc6a FB |
565 | struct dwc3_trb *trb_st_hw; |
566 | struct dwc3_trb *trb_link; | |
72246da4 | 567 | |
16e78db7 | 568 | dep->endpoint.desc = desc; |
c90bfaec | 569 | dep->comp_desc = comp_desc; |
72246da4 FB |
570 | dep->type = usb_endpoint_type(desc); |
571 | dep->flags |= DWC3_EP_ENABLED; | |
572 | ||
573 | reg = dwc3_readl(dwc->regs, DWC3_DALEPENA); | |
574 | reg |= DWC3_DALEPENA_EP(dep->number); | |
575 | dwc3_writel(dwc->regs, DWC3_DALEPENA, reg); | |
576 | ||
36b68aae | 577 | if (usb_endpoint_xfer_control(desc)) |
7ab373aa | 578 | return 0; |
72246da4 | 579 | |
0d25744a JY |
580 | /* Initialize the TRB ring */ |
581 | dep->trb_dequeue = 0; | |
582 | dep->trb_enqueue = 0; | |
583 | memset(dep->trb_pool, 0, | |
584 | sizeof(struct dwc3_trb) * DWC3_TRB_NUM); | |
585 | ||
36b68aae | 586 | /* Link TRB. The HWO bit is never reset */ |
72246da4 FB |
587 | trb_st_hw = &dep->trb_pool[0]; |
588 | ||
f6bafc6a | 589 | trb_link = &dep->trb_pool[DWC3_TRB_NUM - 1]; |
f6bafc6a FB |
590 | trb_link->bpl = lower_32_bits(dwc3_trb_dma_offset(dep, trb_st_hw)); |
591 | trb_link->bph = upper_32_bits(dwc3_trb_dma_offset(dep, trb_st_hw)); | |
592 | trb_link->ctrl |= DWC3_TRBCTL_LINK_TRB; | |
593 | trb_link->ctrl |= DWC3_TRB_CTRL_HWO; | |
72246da4 FB |
594 | } |
595 | ||
596 | return 0; | |
597 | } | |
598 | ||
b992e681 | 599 | static void dwc3_stop_active_transfer(struct dwc3 *dwc, u32 epnum, bool force); |
624407f9 | 600 | static void dwc3_remove_requests(struct dwc3 *dwc, struct dwc3_ep *dep) |
72246da4 FB |
601 | { |
602 | struct dwc3_request *req; | |
603 | ||
aa3342c8 | 604 | if (!list_empty(&dep->started_list)) { |
b992e681 | 605 | dwc3_stop_active_transfer(dwc, dep->number, true); |
624407f9 | 606 | |
57911504 | 607 | /* - giveback all requests to gadget driver */ |
aa3342c8 FB |
608 | while (!list_empty(&dep->started_list)) { |
609 | req = next_request(&dep->started_list); | |
1591633e PA |
610 | |
611 | dwc3_gadget_giveback(dep, req, -ESHUTDOWN); | |
612 | } | |
ea53b882 FB |
613 | } |
614 | ||
aa3342c8 FB |
615 | while (!list_empty(&dep->pending_list)) { |
616 | req = next_request(&dep->pending_list); | |
72246da4 | 617 | |
624407f9 | 618 | dwc3_gadget_giveback(dep, req, -ESHUTDOWN); |
72246da4 | 619 | } |
72246da4 FB |
620 | } |
621 | ||
622 | /** | |
623 | * __dwc3_gadget_ep_disable - Disables a HW endpoint | |
624 | * @dep: the endpoint to disable | |
625 | * | |
624407f9 SAS |
626 | * This function also removes requests which are currently processed ny the |
627 | * hardware and those which are not yet scheduled. | |
628 | * Caller should take care of locking. | |
72246da4 | 629 | */ |
72246da4 FB |
630 | static int __dwc3_gadget_ep_disable(struct dwc3_ep *dep) |
631 | { | |
632 | struct dwc3 *dwc = dep->dwc; | |
633 | u32 reg; | |
634 | ||
7eaeac5c FB |
635 | dwc3_trace(trace_dwc3_gadget, "Disabling %s", dep->name); |
636 | ||
624407f9 | 637 | dwc3_remove_requests(dwc, dep); |
72246da4 | 638 | |
687ef981 FB |
639 | /* make sure HW endpoint isn't stalled */ |
640 | if (dep->flags & DWC3_EP_STALL) | |
7a608559 | 641 | __dwc3_gadget_ep_set_halt(dep, 0, false); |
687ef981 | 642 | |
72246da4 FB |
643 | reg = dwc3_readl(dwc->regs, DWC3_DALEPENA); |
644 | reg &= ~DWC3_DALEPENA_EP(dep->number); | |
645 | dwc3_writel(dwc->regs, DWC3_DALEPENA, reg); | |
646 | ||
879631aa | 647 | dep->stream_capable = false; |
f9c56cdd | 648 | dep->endpoint.desc = NULL; |
c90bfaec | 649 | dep->comp_desc = NULL; |
72246da4 | 650 | dep->type = 0; |
879631aa | 651 | dep->flags = 0; |
72246da4 FB |
652 | |
653 | return 0; | |
654 | } | |
655 | ||
656 | /* -------------------------------------------------------------------------- */ | |
657 | ||
658 | static int dwc3_gadget_ep0_enable(struct usb_ep *ep, | |
659 | const struct usb_endpoint_descriptor *desc) | |
660 | { | |
661 | return -EINVAL; | |
662 | } | |
663 | ||
664 | static int dwc3_gadget_ep0_disable(struct usb_ep *ep) | |
665 | { | |
666 | return -EINVAL; | |
667 | } | |
668 | ||
669 | /* -------------------------------------------------------------------------- */ | |
670 | ||
671 | static int dwc3_gadget_ep_enable(struct usb_ep *ep, | |
672 | const struct usb_endpoint_descriptor *desc) | |
673 | { | |
674 | struct dwc3_ep *dep; | |
675 | struct dwc3 *dwc; | |
676 | unsigned long flags; | |
677 | int ret; | |
678 | ||
679 | if (!ep || !desc || desc->bDescriptorType != USB_DT_ENDPOINT) { | |
680 | pr_debug("dwc3: invalid parameters\n"); | |
681 | return -EINVAL; | |
682 | } | |
683 | ||
684 | if (!desc->wMaxPacketSize) { | |
685 | pr_debug("dwc3: missing wMaxPacketSize\n"); | |
686 | return -EINVAL; | |
687 | } | |
688 | ||
689 | dep = to_dwc3_ep(ep); | |
690 | dwc = dep->dwc; | |
691 | ||
95ca961c FB |
692 | if (dev_WARN_ONCE(dwc->dev, dep->flags & DWC3_EP_ENABLED, |
693 | "%s is already enabled\n", | |
694 | dep->name)) | |
c6f83f38 | 695 | return 0; |
c6f83f38 | 696 | |
72246da4 | 697 | spin_lock_irqsave(&dwc->lock, flags); |
265b70a7 | 698 | ret = __dwc3_gadget_ep_enable(dep, desc, ep->comp_desc, false, false); |
72246da4 FB |
699 | spin_unlock_irqrestore(&dwc->lock, flags); |
700 | ||
701 | return ret; | |
702 | } | |
703 | ||
704 | static int dwc3_gadget_ep_disable(struct usb_ep *ep) | |
705 | { | |
706 | struct dwc3_ep *dep; | |
707 | struct dwc3 *dwc; | |
708 | unsigned long flags; | |
709 | int ret; | |
710 | ||
711 | if (!ep) { | |
712 | pr_debug("dwc3: invalid parameters\n"); | |
713 | return -EINVAL; | |
714 | } | |
715 | ||
716 | dep = to_dwc3_ep(ep); | |
717 | dwc = dep->dwc; | |
718 | ||
95ca961c FB |
719 | if (dev_WARN_ONCE(dwc->dev, !(dep->flags & DWC3_EP_ENABLED), |
720 | "%s is already disabled\n", | |
721 | dep->name)) | |
72246da4 | 722 | return 0; |
72246da4 | 723 | |
72246da4 FB |
724 | spin_lock_irqsave(&dwc->lock, flags); |
725 | ret = __dwc3_gadget_ep_disable(dep); | |
726 | spin_unlock_irqrestore(&dwc->lock, flags); | |
727 | ||
728 | return ret; | |
729 | } | |
730 | ||
731 | static struct usb_request *dwc3_gadget_ep_alloc_request(struct usb_ep *ep, | |
732 | gfp_t gfp_flags) | |
733 | { | |
734 | struct dwc3_request *req; | |
735 | struct dwc3_ep *dep = to_dwc3_ep(ep); | |
72246da4 FB |
736 | |
737 | req = kzalloc(sizeof(*req), gfp_flags); | |
734d5a53 | 738 | if (!req) |
72246da4 | 739 | return NULL; |
72246da4 FB |
740 | |
741 | req->epnum = dep->number; | |
742 | req->dep = dep; | |
72246da4 | 743 | |
2c4cbe6e FB |
744 | trace_dwc3_alloc_request(req); |
745 | ||
72246da4 FB |
746 | return &req->request; |
747 | } | |
748 | ||
749 | static void dwc3_gadget_ep_free_request(struct usb_ep *ep, | |
750 | struct usb_request *request) | |
751 | { | |
752 | struct dwc3_request *req = to_dwc3_request(request); | |
753 | ||
2c4cbe6e | 754 | trace_dwc3_free_request(req); |
72246da4 FB |
755 | kfree(req); |
756 | } | |
757 | ||
c71fc37c FB |
758 | /** |
759 | * dwc3_prepare_one_trb - setup one TRB from one request | |
760 | * @dep: endpoint for which this request is prepared | |
761 | * @req: dwc3_request pointer | |
762 | */ | |
68e823e2 | 763 | static void dwc3_prepare_one_trb(struct dwc3_ep *dep, |
eeb720fb | 764 | struct dwc3_request *req, dma_addr_t dma, |
e5ba5ec8 | 765 | unsigned length, unsigned last, unsigned chain, unsigned node) |
c71fc37c | 766 | { |
f6bafc6a | 767 | struct dwc3_trb *trb; |
c71fc37c | 768 | |
73815280 | 769 | dwc3_trace(trace_dwc3_gadget, "%s: req %p dma %08llx length %d%s%s", |
eeb720fb FB |
770 | dep->name, req, (unsigned long long) dma, |
771 | length, last ? " last" : "", | |
772 | chain ? " chain" : ""); | |
773 | ||
915e202a | 774 | |
4faf7550 | 775 | trb = &dep->trb_pool[dep->trb_enqueue]; |
c71fc37c | 776 | |
eeb720fb | 777 | if (!req->trb) { |
aa3342c8 | 778 | dwc3_gadget_move_started_request(req); |
f6bafc6a FB |
779 | req->trb = trb; |
780 | req->trb_dma = dwc3_trb_dma_offset(dep, trb); | |
4faf7550 | 781 | req->first_trb_index = dep->trb_enqueue; |
eeb720fb | 782 | } |
c71fc37c | 783 | |
ef966b9d | 784 | dwc3_ep_inc_enq(dep); |
e5ba5ec8 | 785 | |
f6bafc6a FB |
786 | trb->size = DWC3_TRB_SIZE_LENGTH(length); |
787 | trb->bpl = lower_32_bits(dma); | |
788 | trb->bph = upper_32_bits(dma); | |
c71fc37c | 789 | |
16e78db7 | 790 | switch (usb_endpoint_type(dep->endpoint.desc)) { |
c71fc37c | 791 | case USB_ENDPOINT_XFER_CONTROL: |
f6bafc6a | 792 | trb->ctrl = DWC3_TRBCTL_CONTROL_SETUP; |
c71fc37c FB |
793 | break; |
794 | ||
795 | case USB_ENDPOINT_XFER_ISOC: | |
e5ba5ec8 PA |
796 | if (!node) |
797 | trb->ctrl = DWC3_TRBCTL_ISOCHRONOUS_FIRST; | |
798 | else | |
799 | trb->ctrl = DWC3_TRBCTL_ISOCHRONOUS; | |
ca4d44ea FB |
800 | |
801 | /* always enable Interrupt on Missed ISOC */ | |
802 | trb->ctrl |= DWC3_TRB_CTRL_ISP_IMI; | |
c71fc37c FB |
803 | break; |
804 | ||
805 | case USB_ENDPOINT_XFER_BULK: | |
806 | case USB_ENDPOINT_XFER_INT: | |
f6bafc6a | 807 | trb->ctrl = DWC3_TRBCTL_NORMAL; |
c71fc37c FB |
808 | break; |
809 | default: | |
810 | /* | |
811 | * This is only possible with faulty memory because we | |
812 | * checked it already :) | |
813 | */ | |
814 | BUG(); | |
815 | } | |
816 | ||
ca4d44ea FB |
817 | /* always enable Continue on Short Packet */ |
818 | trb->ctrl |= DWC3_TRB_CTRL_CSP; | |
f3af3651 | 819 | |
f3af3651 | 820 | if (!req->request.no_interrupt && !chain) |
ca4d44ea | 821 | trb->ctrl |= DWC3_TRB_CTRL_IOC | DWC3_TRB_CTRL_ISP_IMI; |
f3af3651 | 822 | |
ca4d44ea | 823 | if (last) |
e5ba5ec8 | 824 | trb->ctrl |= DWC3_TRB_CTRL_LST; |
c71fc37c | 825 | |
e5ba5ec8 PA |
826 | if (chain) |
827 | trb->ctrl |= DWC3_TRB_CTRL_CHN; | |
828 | ||
16e78db7 | 829 | if (usb_endpoint_xfer_bulk(dep->endpoint.desc) && dep->stream_capable) |
f6bafc6a | 830 | trb->ctrl |= DWC3_TRB_CTRL_SID_SOFN(req->request.stream_id); |
c71fc37c | 831 | |
f6bafc6a | 832 | trb->ctrl |= DWC3_TRB_CTRL_HWO; |
2c4cbe6e FB |
833 | |
834 | trace_dwc3_prepare_trb(dep, trb); | |
c71fc37c FB |
835 | } |
836 | ||
361572b5 JY |
837 | /** |
838 | * dwc3_ep_prev_trb() - Returns the previous TRB in the ring | |
839 | * @dep: The endpoint with the TRB ring | |
840 | * @index: The index of the current TRB in the ring | |
841 | * | |
842 | * Returns the TRB prior to the one pointed to by the index. If the | |
843 | * index is 0, we will wrap backwards, skip the link TRB, and return | |
844 | * the one just before that. | |
845 | */ | |
846 | static struct dwc3_trb *dwc3_ep_prev_trb(struct dwc3_ep *dep, u8 index) | |
847 | { | |
848 | if (!index) | |
849 | index = DWC3_TRB_NUM - 2; | |
850 | else | |
851 | index = dep->trb_enqueue - 1; | |
852 | ||
853 | return &dep->trb_pool[index]; | |
854 | } | |
855 | ||
c4233573 FB |
856 | static u32 dwc3_calc_trbs_left(struct dwc3_ep *dep) |
857 | { | |
858 | struct dwc3_trb *tmp; | |
32db3d94 | 859 | u8 trbs_left; |
c4233573 FB |
860 | |
861 | /* | |
862 | * If enqueue & dequeue are equal than it is either full or empty. | |
863 | * | |
864 | * One way to know for sure is if the TRB right before us has HWO bit | |
865 | * set or not. If it has, then we're definitely full and can't fit any | |
866 | * more transfers in our ring. | |
867 | */ | |
868 | if (dep->trb_enqueue == dep->trb_dequeue) { | |
361572b5 JY |
869 | tmp = dwc3_ep_prev_trb(dep, dep->trb_enqueue); |
870 | if (tmp->ctrl & DWC3_TRB_CTRL_HWO) | |
871 | return 0; | |
c4233573 FB |
872 | |
873 | return DWC3_TRB_NUM - 1; | |
874 | } | |
875 | ||
32db3d94 | 876 | trbs_left = dep->trb_dequeue - dep->trb_enqueue; |
3de2685f | 877 | trbs_left &= (DWC3_TRB_NUM - 1); |
32db3d94 | 878 | |
7d0a038b JY |
879 | if (dep->trb_dequeue < dep->trb_enqueue) |
880 | trbs_left--; | |
881 | ||
32db3d94 | 882 | return trbs_left; |
c4233573 FB |
883 | } |
884 | ||
5ee85d89 FB |
885 | static void dwc3_prepare_one_trb_sg(struct dwc3_ep *dep, |
886 | struct dwc3_request *req, unsigned int trbs_left) | |
887 | { | |
888 | struct usb_request *request = &req->request; | |
889 | struct scatterlist *sg = request->sg; | |
890 | struct scatterlist *s; | |
891 | unsigned int last = false; | |
892 | unsigned int length; | |
893 | dma_addr_t dma; | |
894 | int i; | |
895 | ||
896 | for_each_sg(sg, s, request->num_mapped_sgs, i) { | |
897 | unsigned chain = true; | |
898 | ||
899 | length = sg_dma_len(s); | |
900 | dma = sg_dma_address(s); | |
901 | ||
902 | if (sg_is_last(s)) { | |
903 | if (list_is_last(&req->list, &dep->pending_list)) | |
904 | last = true; | |
905 | ||
906 | chain = false; | |
907 | } | |
908 | ||
909 | if (!trbs_left) | |
910 | last = true; | |
911 | ||
912 | if (last) | |
913 | chain = false; | |
914 | ||
915 | dwc3_prepare_one_trb(dep, req, dma, length, | |
916 | last, chain, i); | |
917 | ||
918 | if (last) | |
919 | break; | |
920 | } | |
921 | } | |
922 | ||
923 | static void dwc3_prepare_one_trb_linear(struct dwc3_ep *dep, | |
924 | struct dwc3_request *req, unsigned int trbs_left) | |
925 | { | |
926 | unsigned int last = false; | |
927 | unsigned int length; | |
928 | dma_addr_t dma; | |
929 | ||
930 | dma = req->request.dma; | |
931 | length = req->request.length; | |
932 | ||
933 | if (!trbs_left) | |
934 | last = true; | |
935 | ||
936 | /* Is this the last request? */ | |
937 | if (list_is_last(&req->list, &dep->pending_list)) | |
938 | last = true; | |
939 | ||
940 | dwc3_prepare_one_trb(dep, req, dma, length, | |
941 | last, false, 0); | |
942 | } | |
943 | ||
72246da4 FB |
944 | /* |
945 | * dwc3_prepare_trbs - setup TRBs from requests | |
946 | * @dep: endpoint for which requests are being prepared | |
72246da4 | 947 | * |
1d046793 PZ |
948 | * The function goes through the requests list and sets up TRBs for the |
949 | * transfers. The function returns once there are no more TRBs available or | |
950 | * it runs out of requests. | |
72246da4 | 951 | */ |
c4233573 | 952 | static void dwc3_prepare_trbs(struct dwc3_ep *dep) |
72246da4 | 953 | { |
68e823e2 | 954 | struct dwc3_request *req, *n; |
72246da4 FB |
955 | u32 trbs_left; |
956 | ||
957 | BUILD_BUG_ON_NOT_POWER_OF_2(DWC3_TRB_NUM); | |
958 | ||
c4233573 | 959 | trbs_left = dwc3_calc_trbs_left(dep); |
89bc856e JY |
960 | if (!trbs_left) |
961 | return; | |
72246da4 | 962 | |
aa3342c8 | 963 | list_for_each_entry_safe(req, n, &dep->pending_list, list) { |
5ee85d89 FB |
964 | if (req->request.num_mapped_sgs > 0) |
965 | dwc3_prepare_one_trb_sg(dep, req, trbs_left--); | |
966 | else | |
967 | dwc3_prepare_one_trb_linear(dep, req, trbs_left--); | |
72246da4 | 968 | |
5ee85d89 FB |
969 | if (!trbs_left) |
970 | return; | |
72246da4 | 971 | } |
72246da4 FB |
972 | } |
973 | ||
4fae2e3e | 974 | static int __dwc3_gadget_kick_transfer(struct dwc3_ep *dep, u16 cmd_param) |
72246da4 FB |
975 | { |
976 | struct dwc3_gadget_ep_cmd_params params; | |
977 | struct dwc3_request *req; | |
978 | struct dwc3 *dwc = dep->dwc; | |
4fae2e3e | 979 | int starting; |
72246da4 FB |
980 | int ret; |
981 | u32 cmd; | |
982 | ||
4fae2e3e | 983 | starting = !(dep->flags & DWC3_EP_BUSY); |
72246da4 | 984 | |
4fae2e3e FB |
985 | dwc3_prepare_trbs(dep); |
986 | req = next_request(&dep->started_list); | |
72246da4 FB |
987 | if (!req) { |
988 | dep->flags |= DWC3_EP_PENDING_REQUEST; | |
989 | return 0; | |
990 | } | |
991 | ||
992 | memset(¶ms, 0, sizeof(params)); | |
72246da4 | 993 | |
4fae2e3e | 994 | if (starting) { |
1877d6c9 PA |
995 | params.param0 = upper_32_bits(req->trb_dma); |
996 | params.param1 = lower_32_bits(req->trb_dma); | |
b6b1c6db FB |
997 | cmd = DWC3_DEPCMD_STARTTRANSFER | |
998 | DWC3_DEPCMD_PARAM(cmd_param); | |
1877d6c9 | 999 | } else { |
b6b1c6db FB |
1000 | cmd = DWC3_DEPCMD_UPDATETRANSFER | |
1001 | DWC3_DEPCMD_PARAM(dep->resource_index); | |
1877d6c9 | 1002 | } |
72246da4 | 1003 | |
2cd4718d | 1004 | ret = dwc3_send_gadget_ep_cmd(dep, cmd, ¶ms); |
72246da4 | 1005 | if (ret < 0) { |
72246da4 FB |
1006 | /* |
1007 | * FIXME we need to iterate over the list of requests | |
1008 | * here and stop, unmap, free and del each of the linked | |
1d046793 | 1009 | * requests instead of what we do now. |
72246da4 | 1010 | */ |
0fc9a1be FB |
1011 | usb_gadget_unmap_request(&dwc->gadget, &req->request, |
1012 | req->direction); | |
72246da4 FB |
1013 | list_del(&req->list); |
1014 | return ret; | |
1015 | } | |
1016 | ||
1017 | dep->flags |= DWC3_EP_BUSY; | |
25b8ff68 | 1018 | |
4fae2e3e | 1019 | if (starting) { |
2eb88016 | 1020 | dep->resource_index = dwc3_gadget_ep_get_transfer_index(dep); |
b4996a86 | 1021 | WARN_ON_ONCE(!dep->resource_index); |
f898ae09 | 1022 | } |
25b8ff68 | 1023 | |
72246da4 FB |
1024 | return 0; |
1025 | } | |
1026 | ||
d6d6ec7b PA |
1027 | static void __dwc3_gadget_start_isoc(struct dwc3 *dwc, |
1028 | struct dwc3_ep *dep, u32 cur_uf) | |
1029 | { | |
1030 | u32 uf; | |
1031 | ||
aa3342c8 | 1032 | if (list_empty(&dep->pending_list)) { |
73815280 FB |
1033 | dwc3_trace(trace_dwc3_gadget, |
1034 | "ISOC ep %s run out for requests", | |
1035 | dep->name); | |
f4a53c55 | 1036 | dep->flags |= DWC3_EP_PENDING_REQUEST; |
d6d6ec7b PA |
1037 | return; |
1038 | } | |
1039 | ||
1040 | /* 4 micro frames in the future */ | |
1041 | uf = cur_uf + dep->interval * 4; | |
1042 | ||
4fae2e3e | 1043 | __dwc3_gadget_kick_transfer(dep, uf); |
d6d6ec7b PA |
1044 | } |
1045 | ||
1046 | static void dwc3_gadget_start_isoc(struct dwc3 *dwc, | |
1047 | struct dwc3_ep *dep, const struct dwc3_event_depevt *event) | |
1048 | { | |
1049 | u32 cur_uf, mask; | |
1050 | ||
1051 | mask = ~(dep->interval - 1); | |
1052 | cur_uf = event->parameters & mask; | |
1053 | ||
1054 | __dwc3_gadget_start_isoc(dwc, dep, cur_uf); | |
1055 | } | |
1056 | ||
72246da4 FB |
1057 | static int __dwc3_gadget_ep_queue(struct dwc3_ep *dep, struct dwc3_request *req) |
1058 | { | |
0fc9a1be FB |
1059 | struct dwc3 *dwc = dep->dwc; |
1060 | int ret; | |
1061 | ||
bb423984 | 1062 | if (!dep->endpoint.desc) { |
ec5e795c | 1063 | dwc3_trace(trace_dwc3_gadget, |
60cfb37a | 1064 | "trying to queue request %p to disabled %s", |
bb423984 FB |
1065 | &req->request, dep->endpoint.name); |
1066 | return -ESHUTDOWN; | |
1067 | } | |
1068 | ||
1069 | if (WARN(req->dep != dep, "request %p belongs to '%s'\n", | |
1070 | &req->request, req->dep->name)) { | |
60cfb37a | 1071 | dwc3_trace(trace_dwc3_gadget, "request %p belongs to '%s'", |
ec5e795c | 1072 | &req->request, req->dep->name); |
bb423984 FB |
1073 | return -EINVAL; |
1074 | } | |
1075 | ||
fc8bb91b FB |
1076 | pm_runtime_get(dwc->dev); |
1077 | ||
72246da4 FB |
1078 | req->request.actual = 0; |
1079 | req->request.status = -EINPROGRESS; | |
1080 | req->direction = dep->direction; | |
1081 | req->epnum = dep->number; | |
1082 | ||
fe84f522 FB |
1083 | trace_dwc3_ep_queue(req); |
1084 | ||
72246da4 FB |
1085 | /* |
1086 | * We only add to our list of requests now and | |
1087 | * start consuming the list once we get XferNotReady | |
1088 | * IRQ. | |
1089 | * | |
1090 | * That way, we avoid doing anything that we don't need | |
1091 | * to do now and defer it until the point we receive a | |
1092 | * particular token from the Host side. | |
1093 | * | |
1094 | * This will also avoid Host cancelling URBs due to too | |
1d046793 | 1095 | * many NAKs. |
72246da4 | 1096 | */ |
0fc9a1be FB |
1097 | ret = usb_gadget_map_request(&dwc->gadget, &req->request, |
1098 | dep->direction); | |
1099 | if (ret) | |
1100 | return ret; | |
1101 | ||
aa3342c8 | 1102 | list_add_tail(&req->list, &dep->pending_list); |
72246da4 | 1103 | |
1d6a3918 FB |
1104 | /* |
1105 | * If there are no pending requests and the endpoint isn't already | |
1106 | * busy, we will just start the request straight away. | |
1107 | * | |
1108 | * This will save one IRQ (XFER_NOT_READY) and possibly make it a | |
1109 | * little bit faster. | |
1110 | */ | |
1111 | if (!usb_endpoint_xfer_isoc(dep->endpoint.desc) && | |
62e345ae | 1112 | !usb_endpoint_xfer_int(dep->endpoint.desc) && |
1d6a3918 | 1113 | !(dep->flags & DWC3_EP_BUSY)) { |
4fae2e3e | 1114 | ret = __dwc3_gadget_kick_transfer(dep, 0); |
a8f32817 | 1115 | goto out; |
1d6a3918 FB |
1116 | } |
1117 | ||
72246da4 | 1118 | /* |
b511e5e7 | 1119 | * There are a few special cases: |
72246da4 | 1120 | * |
f898ae09 PZ |
1121 | * 1. XferNotReady with empty list of requests. We need to kick the |
1122 | * transfer here in that situation, otherwise we will be NAKing | |
1123 | * forever. If we get XferNotReady before gadget driver has a | |
1124 | * chance to queue a request, we will ACK the IRQ but won't be | |
1125 | * able to receive the data until the next request is queued. | |
1126 | * The following code is handling exactly that. | |
72246da4 | 1127 | * |
72246da4 FB |
1128 | */ |
1129 | if (dep->flags & DWC3_EP_PENDING_REQUEST) { | |
f4a53c55 PA |
1130 | /* |
1131 | * If xfernotready is already elapsed and it is a case | |
1132 | * of isoc transfer, then issue END TRANSFER, so that | |
1133 | * you can receive xfernotready again and can have | |
1134 | * notion of current microframe. | |
1135 | */ | |
1136 | if (usb_endpoint_xfer_isoc(dep->endpoint.desc)) { | |
aa3342c8 | 1137 | if (list_empty(&dep->started_list)) { |
b992e681 | 1138 | dwc3_stop_active_transfer(dwc, dep->number, true); |
cdc359dd PA |
1139 | dep->flags = DWC3_EP_ENABLED; |
1140 | } | |
f4a53c55 PA |
1141 | return 0; |
1142 | } | |
1143 | ||
4fae2e3e | 1144 | ret = __dwc3_gadget_kick_transfer(dep, 0); |
89185916 FB |
1145 | if (!ret) |
1146 | dep->flags &= ~DWC3_EP_PENDING_REQUEST; | |
1147 | ||
a8f32817 | 1148 | goto out; |
b511e5e7 | 1149 | } |
72246da4 | 1150 | |
b511e5e7 FB |
1151 | /* |
1152 | * 2. XferInProgress on Isoc EP with an active transfer. We need to | |
1153 | * kick the transfer here after queuing a request, otherwise the | |
1154 | * core may not see the modified TRB(s). | |
1155 | */ | |
1156 | if (usb_endpoint_xfer_isoc(dep->endpoint.desc) && | |
79c9046e PA |
1157 | (dep->flags & DWC3_EP_BUSY) && |
1158 | !(dep->flags & DWC3_EP_MISSED_ISOC)) { | |
b4996a86 | 1159 | WARN_ON_ONCE(!dep->resource_index); |
4fae2e3e | 1160 | ret = __dwc3_gadget_kick_transfer(dep, dep->resource_index); |
a8f32817 | 1161 | goto out; |
a0925324 | 1162 | } |
72246da4 | 1163 | |
b997ada5 FB |
1164 | /* |
1165 | * 4. Stream Capable Bulk Endpoints. We need to start the transfer | |
1166 | * right away, otherwise host will not know we have streams to be | |
1167 | * handled. | |
1168 | */ | |
a8f32817 | 1169 | if (dep->stream_capable) |
4fae2e3e | 1170 | ret = __dwc3_gadget_kick_transfer(dep, 0); |
b997ada5 | 1171 | |
a8f32817 FB |
1172 | out: |
1173 | if (ret && ret != -EBUSY) | |
ec5e795c | 1174 | dwc3_trace(trace_dwc3_gadget, |
60cfb37a | 1175 | "%s: failed to kick transfers", |
a8f32817 FB |
1176 | dep->name); |
1177 | if (ret == -EBUSY) | |
1178 | ret = 0; | |
1179 | ||
1180 | return ret; | |
72246da4 FB |
1181 | } |
1182 | ||
04c03d10 FB |
1183 | static void __dwc3_gadget_ep_zlp_complete(struct usb_ep *ep, |
1184 | struct usb_request *request) | |
1185 | { | |
1186 | dwc3_gadget_ep_free_request(ep, request); | |
1187 | } | |
1188 | ||
1189 | static int __dwc3_gadget_ep_queue_zlp(struct dwc3 *dwc, struct dwc3_ep *dep) | |
1190 | { | |
1191 | struct dwc3_request *req; | |
1192 | struct usb_request *request; | |
1193 | struct usb_ep *ep = &dep->endpoint; | |
1194 | ||
60cfb37a | 1195 | dwc3_trace(trace_dwc3_gadget, "queueing ZLP"); |
04c03d10 FB |
1196 | request = dwc3_gadget_ep_alloc_request(ep, GFP_ATOMIC); |
1197 | if (!request) | |
1198 | return -ENOMEM; | |
1199 | ||
1200 | request->length = 0; | |
1201 | request->buf = dwc->zlp_buf; | |
1202 | request->complete = __dwc3_gadget_ep_zlp_complete; | |
1203 | ||
1204 | req = to_dwc3_request(request); | |
1205 | ||
1206 | return __dwc3_gadget_ep_queue(dep, req); | |
1207 | } | |
1208 | ||
72246da4 FB |
1209 | static int dwc3_gadget_ep_queue(struct usb_ep *ep, struct usb_request *request, |
1210 | gfp_t gfp_flags) | |
1211 | { | |
1212 | struct dwc3_request *req = to_dwc3_request(request); | |
1213 | struct dwc3_ep *dep = to_dwc3_ep(ep); | |
1214 | struct dwc3 *dwc = dep->dwc; | |
1215 | ||
1216 | unsigned long flags; | |
1217 | ||
1218 | int ret; | |
1219 | ||
fdee4eba | 1220 | spin_lock_irqsave(&dwc->lock, flags); |
72246da4 | 1221 | ret = __dwc3_gadget_ep_queue(dep, req); |
04c03d10 FB |
1222 | |
1223 | /* | |
1224 | * Okay, here's the thing, if gadget driver has requested for a ZLP by | |
1225 | * setting request->zero, instead of doing magic, we will just queue an | |
1226 | * extra usb_request ourselves so that it gets handled the same way as | |
1227 | * any other request. | |
1228 | */ | |
d9261898 JY |
1229 | if (ret == 0 && request->zero && request->length && |
1230 | (request->length % ep->maxpacket == 0)) | |
04c03d10 FB |
1231 | ret = __dwc3_gadget_ep_queue_zlp(dwc, dep); |
1232 | ||
72246da4 FB |
1233 | spin_unlock_irqrestore(&dwc->lock, flags); |
1234 | ||
1235 | return ret; | |
1236 | } | |
1237 | ||
1238 | static int dwc3_gadget_ep_dequeue(struct usb_ep *ep, | |
1239 | struct usb_request *request) | |
1240 | { | |
1241 | struct dwc3_request *req = to_dwc3_request(request); | |
1242 | struct dwc3_request *r = NULL; | |
1243 | ||
1244 | struct dwc3_ep *dep = to_dwc3_ep(ep); | |
1245 | struct dwc3 *dwc = dep->dwc; | |
1246 | ||
1247 | unsigned long flags; | |
1248 | int ret = 0; | |
1249 | ||
2c4cbe6e FB |
1250 | trace_dwc3_ep_dequeue(req); |
1251 | ||
72246da4 FB |
1252 | spin_lock_irqsave(&dwc->lock, flags); |
1253 | ||
aa3342c8 | 1254 | list_for_each_entry(r, &dep->pending_list, list) { |
72246da4 FB |
1255 | if (r == req) |
1256 | break; | |
1257 | } | |
1258 | ||
1259 | if (r != req) { | |
aa3342c8 | 1260 | list_for_each_entry(r, &dep->started_list, list) { |
72246da4 FB |
1261 | if (r == req) |
1262 | break; | |
1263 | } | |
1264 | if (r == req) { | |
1265 | /* wait until it is processed */ | |
b992e681 | 1266 | dwc3_stop_active_transfer(dwc, dep->number, true); |
e8d4e8be | 1267 | goto out1; |
72246da4 FB |
1268 | } |
1269 | dev_err(dwc->dev, "request %p was not queued to %s\n", | |
1270 | request, ep->name); | |
1271 | ret = -EINVAL; | |
1272 | goto out0; | |
1273 | } | |
1274 | ||
e8d4e8be | 1275 | out1: |
72246da4 FB |
1276 | /* giveback the request */ |
1277 | dwc3_gadget_giveback(dep, req, -ECONNRESET); | |
1278 | ||
1279 | out0: | |
1280 | spin_unlock_irqrestore(&dwc->lock, flags); | |
1281 | ||
1282 | return ret; | |
1283 | } | |
1284 | ||
7a608559 | 1285 | int __dwc3_gadget_ep_set_halt(struct dwc3_ep *dep, int value, int protocol) |
72246da4 FB |
1286 | { |
1287 | struct dwc3_gadget_ep_cmd_params params; | |
1288 | struct dwc3 *dwc = dep->dwc; | |
1289 | int ret; | |
1290 | ||
5ad02fb8 FB |
1291 | if (usb_endpoint_xfer_isoc(dep->endpoint.desc)) { |
1292 | dev_err(dwc->dev, "%s is of Isochronous type\n", dep->name); | |
1293 | return -EINVAL; | |
1294 | } | |
1295 | ||
72246da4 FB |
1296 | memset(¶ms, 0x00, sizeof(params)); |
1297 | ||
1298 | if (value) { | |
7a608559 | 1299 | if (!protocol && ((dep->direction && dep->flags & DWC3_EP_BUSY) || |
aa3342c8 FB |
1300 | (!list_empty(&dep->started_list) || |
1301 | !list_empty(&dep->pending_list)))) { | |
ec5e795c | 1302 | dwc3_trace(trace_dwc3_gadget, |
052ba52e | 1303 | "%s: pending request, cannot halt", |
7a608559 FB |
1304 | dep->name); |
1305 | return -EAGAIN; | |
1306 | } | |
1307 | ||
2cd4718d FB |
1308 | ret = dwc3_send_gadget_ep_cmd(dep, DWC3_DEPCMD_SETSTALL, |
1309 | ¶ms); | |
72246da4 | 1310 | if (ret) |
3f89204b | 1311 | dev_err(dwc->dev, "failed to set STALL on %s\n", |
72246da4 FB |
1312 | dep->name); |
1313 | else | |
1314 | dep->flags |= DWC3_EP_STALL; | |
1315 | } else { | |
2cd4718d | 1316 | |
50c763f8 | 1317 | ret = dwc3_send_clear_stall_ep_cmd(dep); |
72246da4 | 1318 | if (ret) |
3f89204b | 1319 | dev_err(dwc->dev, "failed to clear STALL on %s\n", |
72246da4 FB |
1320 | dep->name); |
1321 | else | |
a535d81c | 1322 | dep->flags &= ~(DWC3_EP_STALL | DWC3_EP_WEDGE); |
72246da4 | 1323 | } |
5275455a | 1324 | |
72246da4 FB |
1325 | return ret; |
1326 | } | |
1327 | ||
1328 | static int dwc3_gadget_ep_set_halt(struct usb_ep *ep, int value) | |
1329 | { | |
1330 | struct dwc3_ep *dep = to_dwc3_ep(ep); | |
1331 | struct dwc3 *dwc = dep->dwc; | |
1332 | ||
1333 | unsigned long flags; | |
1334 | ||
1335 | int ret; | |
1336 | ||
1337 | spin_lock_irqsave(&dwc->lock, flags); | |
7a608559 | 1338 | ret = __dwc3_gadget_ep_set_halt(dep, value, false); |
72246da4 FB |
1339 | spin_unlock_irqrestore(&dwc->lock, flags); |
1340 | ||
1341 | return ret; | |
1342 | } | |
1343 | ||
1344 | static int dwc3_gadget_ep_set_wedge(struct usb_ep *ep) | |
1345 | { | |
1346 | struct dwc3_ep *dep = to_dwc3_ep(ep); | |
249a4569 PZ |
1347 | struct dwc3 *dwc = dep->dwc; |
1348 | unsigned long flags; | |
95aa4e8d | 1349 | int ret; |
72246da4 | 1350 | |
249a4569 | 1351 | spin_lock_irqsave(&dwc->lock, flags); |
72246da4 FB |
1352 | dep->flags |= DWC3_EP_WEDGE; |
1353 | ||
08f0d966 | 1354 | if (dep->number == 0 || dep->number == 1) |
95aa4e8d | 1355 | ret = __dwc3_gadget_ep0_set_halt(ep, 1); |
08f0d966 | 1356 | else |
7a608559 | 1357 | ret = __dwc3_gadget_ep_set_halt(dep, 1, false); |
95aa4e8d FB |
1358 | spin_unlock_irqrestore(&dwc->lock, flags); |
1359 | ||
1360 | return ret; | |
72246da4 FB |
1361 | } |
1362 | ||
1363 | /* -------------------------------------------------------------------------- */ | |
1364 | ||
1365 | static struct usb_endpoint_descriptor dwc3_gadget_ep0_desc = { | |
1366 | .bLength = USB_DT_ENDPOINT_SIZE, | |
1367 | .bDescriptorType = USB_DT_ENDPOINT, | |
1368 | .bmAttributes = USB_ENDPOINT_XFER_CONTROL, | |
1369 | }; | |
1370 | ||
1371 | static const struct usb_ep_ops dwc3_gadget_ep0_ops = { | |
1372 | .enable = dwc3_gadget_ep0_enable, | |
1373 | .disable = dwc3_gadget_ep0_disable, | |
1374 | .alloc_request = dwc3_gadget_ep_alloc_request, | |
1375 | .free_request = dwc3_gadget_ep_free_request, | |
1376 | .queue = dwc3_gadget_ep0_queue, | |
1377 | .dequeue = dwc3_gadget_ep_dequeue, | |
08f0d966 | 1378 | .set_halt = dwc3_gadget_ep0_set_halt, |
72246da4 FB |
1379 | .set_wedge = dwc3_gadget_ep_set_wedge, |
1380 | }; | |
1381 | ||
1382 | static const struct usb_ep_ops dwc3_gadget_ep_ops = { | |
1383 | .enable = dwc3_gadget_ep_enable, | |
1384 | .disable = dwc3_gadget_ep_disable, | |
1385 | .alloc_request = dwc3_gadget_ep_alloc_request, | |
1386 | .free_request = dwc3_gadget_ep_free_request, | |
1387 | .queue = dwc3_gadget_ep_queue, | |
1388 | .dequeue = dwc3_gadget_ep_dequeue, | |
1389 | .set_halt = dwc3_gadget_ep_set_halt, | |
1390 | .set_wedge = dwc3_gadget_ep_set_wedge, | |
1391 | }; | |
1392 | ||
1393 | /* -------------------------------------------------------------------------- */ | |
1394 | ||
1395 | static int dwc3_gadget_get_frame(struct usb_gadget *g) | |
1396 | { | |
1397 | struct dwc3 *dwc = gadget_to_dwc(g); | |
1398 | u32 reg; | |
1399 | ||
1400 | reg = dwc3_readl(dwc->regs, DWC3_DSTS); | |
1401 | return DWC3_DSTS_SOFFN(reg); | |
1402 | } | |
1403 | ||
218ef7b6 | 1404 | static int __dwc3_gadget_wakeup(struct dwc3 *dwc) |
72246da4 | 1405 | { |
72246da4 | 1406 | unsigned long timeout; |
72246da4 | 1407 | |
218ef7b6 | 1408 | int ret; |
72246da4 FB |
1409 | u32 reg; |
1410 | ||
72246da4 FB |
1411 | u8 link_state; |
1412 | u8 speed; | |
1413 | ||
72246da4 FB |
1414 | /* |
1415 | * According to the Databook Remote wakeup request should | |
1416 | * be issued only when the device is in early suspend state. | |
1417 | * | |
1418 | * We can check that via USB Link State bits in DSTS register. | |
1419 | */ | |
1420 | reg = dwc3_readl(dwc->regs, DWC3_DSTS); | |
1421 | ||
1422 | speed = reg & DWC3_DSTS_CONNECTSPD; | |
ee5cd41c JY |
1423 | if ((speed == DWC3_DSTS_SUPERSPEED) || |
1424 | (speed == DWC3_DSTS_SUPERSPEED_PLUS)) { | |
60cfb37a | 1425 | dwc3_trace(trace_dwc3_gadget, "no wakeup on SuperSpeed"); |
6b742899 | 1426 | return 0; |
72246da4 FB |
1427 | } |
1428 | ||
1429 | link_state = DWC3_DSTS_USBLNKST(reg); | |
1430 | ||
1431 | switch (link_state) { | |
1432 | case DWC3_LINK_STATE_RX_DET: /* in HS, means Early Suspend */ | |
1433 | case DWC3_LINK_STATE_U3: /* in HS, means SUSPEND */ | |
1434 | break; | |
1435 | default: | |
ec5e795c | 1436 | dwc3_trace(trace_dwc3_gadget, |
60cfb37a | 1437 | "can't wakeup from '%s'", |
ec5e795c | 1438 | dwc3_gadget_link_string(link_state)); |
218ef7b6 | 1439 | return -EINVAL; |
72246da4 FB |
1440 | } |
1441 | ||
8598bde7 FB |
1442 | ret = dwc3_gadget_set_link_state(dwc, DWC3_LINK_STATE_RECOV); |
1443 | if (ret < 0) { | |
1444 | dev_err(dwc->dev, "failed to put link in Recovery\n"); | |
218ef7b6 | 1445 | return ret; |
8598bde7 | 1446 | } |
72246da4 | 1447 | |
802fde98 PZ |
1448 | /* Recent versions do this automatically */ |
1449 | if (dwc->revision < DWC3_REVISION_194A) { | |
1450 | /* write zeroes to Link Change Request */ | |
fcc023c7 | 1451 | reg = dwc3_readl(dwc->regs, DWC3_DCTL); |
802fde98 PZ |
1452 | reg &= ~DWC3_DCTL_ULSTCHNGREQ_MASK; |
1453 | dwc3_writel(dwc->regs, DWC3_DCTL, reg); | |
1454 | } | |
72246da4 | 1455 | |
1d046793 | 1456 | /* poll until Link State changes to ON */ |
72246da4 FB |
1457 | timeout = jiffies + msecs_to_jiffies(100); |
1458 | ||
1d046793 | 1459 | while (!time_after(jiffies, timeout)) { |
72246da4 FB |
1460 | reg = dwc3_readl(dwc->regs, DWC3_DSTS); |
1461 | ||
1462 | /* in HS, means ON */ | |
1463 | if (DWC3_DSTS_USBLNKST(reg) == DWC3_LINK_STATE_U0) | |
1464 | break; | |
1465 | } | |
1466 | ||
1467 | if (DWC3_DSTS_USBLNKST(reg) != DWC3_LINK_STATE_U0) { | |
1468 | dev_err(dwc->dev, "failed to send remote wakeup\n"); | |
218ef7b6 | 1469 | return -EINVAL; |
72246da4 FB |
1470 | } |
1471 | ||
218ef7b6 FB |
1472 | return 0; |
1473 | } | |
1474 | ||
1475 | static int dwc3_gadget_wakeup(struct usb_gadget *g) | |
1476 | { | |
1477 | struct dwc3 *dwc = gadget_to_dwc(g); | |
1478 | unsigned long flags; | |
1479 | int ret; | |
1480 | ||
1481 | spin_lock_irqsave(&dwc->lock, flags); | |
1482 | ret = __dwc3_gadget_wakeup(dwc); | |
72246da4 FB |
1483 | spin_unlock_irqrestore(&dwc->lock, flags); |
1484 | ||
1485 | return ret; | |
1486 | } | |
1487 | ||
1488 | static int dwc3_gadget_set_selfpowered(struct usb_gadget *g, | |
1489 | int is_selfpowered) | |
1490 | { | |
1491 | struct dwc3 *dwc = gadget_to_dwc(g); | |
249a4569 | 1492 | unsigned long flags; |
72246da4 | 1493 | |
249a4569 | 1494 | spin_lock_irqsave(&dwc->lock, flags); |
bcdea503 | 1495 | g->is_selfpowered = !!is_selfpowered; |
249a4569 | 1496 | spin_unlock_irqrestore(&dwc->lock, flags); |
72246da4 FB |
1497 | |
1498 | return 0; | |
1499 | } | |
1500 | ||
7b2a0368 | 1501 | static int dwc3_gadget_run_stop(struct dwc3 *dwc, int is_on, int suspend) |
72246da4 FB |
1502 | { |
1503 | u32 reg; | |
61d58242 | 1504 | u32 timeout = 500; |
72246da4 | 1505 | |
fc8bb91b FB |
1506 | if (pm_runtime_suspended(dwc->dev)) |
1507 | return 0; | |
1508 | ||
72246da4 | 1509 | reg = dwc3_readl(dwc->regs, DWC3_DCTL); |
8db7ed15 | 1510 | if (is_on) { |
802fde98 PZ |
1511 | if (dwc->revision <= DWC3_REVISION_187A) { |
1512 | reg &= ~DWC3_DCTL_TRGTULST_MASK; | |
1513 | reg |= DWC3_DCTL_TRGTULST_RX_DET; | |
1514 | } | |
1515 | ||
1516 | if (dwc->revision >= DWC3_REVISION_194A) | |
1517 | reg &= ~DWC3_DCTL_KEEP_CONNECT; | |
1518 | reg |= DWC3_DCTL_RUN_STOP; | |
7b2a0368 FB |
1519 | |
1520 | if (dwc->has_hibernation) | |
1521 | reg |= DWC3_DCTL_KEEP_CONNECT; | |
1522 | ||
9fcb3bd8 | 1523 | dwc->pullups_connected = true; |
8db7ed15 | 1524 | } else { |
72246da4 | 1525 | reg &= ~DWC3_DCTL_RUN_STOP; |
7b2a0368 FB |
1526 | |
1527 | if (dwc->has_hibernation && !suspend) | |
1528 | reg &= ~DWC3_DCTL_KEEP_CONNECT; | |
1529 | ||
9fcb3bd8 | 1530 | dwc->pullups_connected = false; |
8db7ed15 | 1531 | } |
72246da4 FB |
1532 | |
1533 | dwc3_writel(dwc->regs, DWC3_DCTL, reg); | |
1534 | ||
1535 | do { | |
1536 | reg = dwc3_readl(dwc->regs, DWC3_DSTS); | |
1537 | if (is_on) { | |
1538 | if (!(reg & DWC3_DSTS_DEVCTRLHLT)) | |
1539 | break; | |
1540 | } else { | |
1541 | if (reg & DWC3_DSTS_DEVCTRLHLT) | |
1542 | break; | |
1543 | } | |
72246da4 FB |
1544 | timeout--; |
1545 | if (!timeout) | |
6f17f74b | 1546 | return -ETIMEDOUT; |
61d58242 | 1547 | udelay(1); |
72246da4 FB |
1548 | } while (1); |
1549 | ||
73815280 | 1550 | dwc3_trace(trace_dwc3_gadget, "gadget %s data soft-%s", |
72246da4 FB |
1551 | dwc->gadget_driver |
1552 | ? dwc->gadget_driver->function : "no-function", | |
1553 | is_on ? "connect" : "disconnect"); | |
6f17f74b PA |
1554 | |
1555 | return 0; | |
72246da4 FB |
1556 | } |
1557 | ||
1558 | static int dwc3_gadget_pullup(struct usb_gadget *g, int is_on) | |
1559 | { | |
1560 | struct dwc3 *dwc = gadget_to_dwc(g); | |
1561 | unsigned long flags; | |
6f17f74b | 1562 | int ret; |
72246da4 FB |
1563 | |
1564 | is_on = !!is_on; | |
1565 | ||
1566 | spin_lock_irqsave(&dwc->lock, flags); | |
7b2a0368 | 1567 | ret = dwc3_gadget_run_stop(dwc, is_on, false); |
72246da4 FB |
1568 | spin_unlock_irqrestore(&dwc->lock, flags); |
1569 | ||
6f17f74b | 1570 | return ret; |
72246da4 FB |
1571 | } |
1572 | ||
8698e2ac FB |
1573 | static void dwc3_gadget_enable_irq(struct dwc3 *dwc) |
1574 | { | |
1575 | u32 reg; | |
1576 | ||
1577 | /* Enable all but Start and End of Frame IRQs */ | |
1578 | reg = (DWC3_DEVTEN_VNDRDEVTSTRCVEDEN | | |
1579 | DWC3_DEVTEN_EVNTOVERFLOWEN | | |
1580 | DWC3_DEVTEN_CMDCMPLTEN | | |
1581 | DWC3_DEVTEN_ERRTICERREN | | |
1582 | DWC3_DEVTEN_WKUPEVTEN | | |
1583 | DWC3_DEVTEN_ULSTCNGEN | | |
1584 | DWC3_DEVTEN_CONNECTDONEEN | | |
1585 | DWC3_DEVTEN_USBRSTEN | | |
1586 | DWC3_DEVTEN_DISCONNEVTEN); | |
1587 | ||
1588 | dwc3_writel(dwc->regs, DWC3_DEVTEN, reg); | |
1589 | } | |
1590 | ||
1591 | static void dwc3_gadget_disable_irq(struct dwc3 *dwc) | |
1592 | { | |
1593 | /* mask all interrupts */ | |
1594 | dwc3_writel(dwc->regs, DWC3_DEVTEN, 0x00); | |
1595 | } | |
1596 | ||
1597 | static irqreturn_t dwc3_interrupt(int irq, void *_dwc); | |
b15a762f | 1598 | static irqreturn_t dwc3_thread_interrupt(int irq, void *_dwc); |
8698e2ac | 1599 | |
4e99472b FB |
1600 | /** |
1601 | * dwc3_gadget_setup_nump - Calculate and initialize NUMP field of DCFG | |
1602 | * dwc: pointer to our context structure | |
1603 | * | |
1604 | * The following looks like complex but it's actually very simple. In order to | |
1605 | * calculate the number of packets we can burst at once on OUT transfers, we're | |
1606 | * gonna use RxFIFO size. | |
1607 | * | |
1608 | * To calculate RxFIFO size we need two numbers: | |
1609 | * MDWIDTH = size, in bits, of the internal memory bus | |
1610 | * RAM2_DEPTH = depth, in MDWIDTH, of internal RAM2 (where RxFIFO sits) | |
1611 | * | |
1612 | * Given these two numbers, the formula is simple: | |
1613 | * | |
1614 | * RxFIFO Size = (RAM2_DEPTH * MDWIDTH / 8) - 24 - 16; | |
1615 | * | |
1616 | * 24 bytes is for 3x SETUP packets | |
1617 | * 16 bytes is a clock domain crossing tolerance | |
1618 | * | |
1619 | * Given RxFIFO Size, NUMP = RxFIFOSize / 1024; | |
1620 | */ | |
1621 | static void dwc3_gadget_setup_nump(struct dwc3 *dwc) | |
1622 | { | |
1623 | u32 ram2_depth; | |
1624 | u32 mdwidth; | |
1625 | u32 nump; | |
1626 | u32 reg; | |
1627 | ||
1628 | ram2_depth = DWC3_GHWPARAMS7_RAM2_DEPTH(dwc->hwparams.hwparams7); | |
1629 | mdwidth = DWC3_GHWPARAMS0_MDWIDTH(dwc->hwparams.hwparams0); | |
1630 | ||
1631 | nump = ((ram2_depth * mdwidth / 8) - 24 - 16) / 1024; | |
1632 | nump = min_t(u32, nump, 16); | |
1633 | ||
1634 | /* update NumP */ | |
1635 | reg = dwc3_readl(dwc->regs, DWC3_DCFG); | |
1636 | reg &= ~DWC3_DCFG_NUMP_MASK; | |
1637 | reg |= nump << DWC3_DCFG_NUMP_SHIFT; | |
1638 | dwc3_writel(dwc->regs, DWC3_DCFG, reg); | |
1639 | } | |
1640 | ||
d7be2952 | 1641 | static int __dwc3_gadget_start(struct dwc3 *dwc) |
72246da4 | 1642 | { |
72246da4 | 1643 | struct dwc3_ep *dep; |
72246da4 FB |
1644 | int ret = 0; |
1645 | u32 reg; | |
1646 | ||
72246da4 FB |
1647 | reg = dwc3_readl(dwc->regs, DWC3_DCFG); |
1648 | reg &= ~(DWC3_DCFG_SPEED_MASK); | |
07e7f47b FB |
1649 | |
1650 | /** | |
1651 | * WORKAROUND: DWC3 revision < 2.20a have an issue | |
1652 | * which would cause metastability state on Run/Stop | |
1653 | * bit if we try to force the IP to USB2-only mode. | |
1654 | * | |
1655 | * Because of that, we cannot configure the IP to any | |
1656 | * speed other than the SuperSpeed | |
1657 | * | |
1658 | * Refers to: | |
1659 | * | |
1660 | * STAR#9000525659: Clock Domain Crossing on DCTL in | |
1661 | * USB 2.0 Mode | |
1662 | */ | |
f7e846f0 | 1663 | if (dwc->revision < DWC3_REVISION_220A) { |
07e7f47b | 1664 | reg |= DWC3_DCFG_SUPERSPEED; |
f7e846f0 FB |
1665 | } else { |
1666 | switch (dwc->maximum_speed) { | |
1667 | case USB_SPEED_LOW: | |
2da9ad76 | 1668 | reg |= DWC3_DCFG_LOWSPEED; |
f7e846f0 FB |
1669 | break; |
1670 | case USB_SPEED_FULL: | |
2da9ad76 | 1671 | reg |= DWC3_DCFG_FULLSPEED1; |
f7e846f0 FB |
1672 | break; |
1673 | case USB_SPEED_HIGH: | |
2da9ad76 | 1674 | reg |= DWC3_DCFG_HIGHSPEED; |
f7e846f0 | 1675 | break; |
7580862b | 1676 | case USB_SPEED_SUPER_PLUS: |
2da9ad76 | 1677 | reg |= DWC3_DCFG_SUPERSPEED_PLUS; |
7580862b | 1678 | break; |
f7e846f0 | 1679 | default: |
77966eb8 JY |
1680 | dev_err(dwc->dev, "invalid dwc->maximum_speed (%d)\n", |
1681 | dwc->maximum_speed); | |
1682 | /* fall through */ | |
1683 | case USB_SPEED_SUPER: | |
1684 | reg |= DWC3_DCFG_SUPERSPEED; | |
1685 | break; | |
f7e846f0 FB |
1686 | } |
1687 | } | |
72246da4 FB |
1688 | dwc3_writel(dwc->regs, DWC3_DCFG, reg); |
1689 | ||
2a58f9c1 FB |
1690 | /* |
1691 | * We are telling dwc3 that we want to use DCFG.NUMP as ACK TP's NUMP | |
1692 | * field instead of letting dwc3 itself calculate that automatically. | |
1693 | * | |
1694 | * This way, we maximize the chances that we'll be able to get several | |
1695 | * bursts of data without going through any sort of endpoint throttling. | |
1696 | */ | |
1697 | reg = dwc3_readl(dwc->regs, DWC3_GRXTHRCFG); | |
1698 | reg &= ~DWC3_GRXTHRCFG_PKTCNTSEL; | |
1699 | dwc3_writel(dwc->regs, DWC3_GRXTHRCFG, reg); | |
1700 | ||
4e99472b FB |
1701 | dwc3_gadget_setup_nump(dwc); |
1702 | ||
72246da4 FB |
1703 | /* Start with SuperSpeed Default */ |
1704 | dwc3_gadget_ep0_desc.wMaxPacketSize = cpu_to_le16(512); | |
1705 | ||
1706 | dep = dwc->eps[0]; | |
265b70a7 PZ |
1707 | ret = __dwc3_gadget_ep_enable(dep, &dwc3_gadget_ep0_desc, NULL, false, |
1708 | false); | |
72246da4 FB |
1709 | if (ret) { |
1710 | dev_err(dwc->dev, "failed to enable %s\n", dep->name); | |
d7be2952 | 1711 | goto err0; |
72246da4 FB |
1712 | } |
1713 | ||
1714 | dep = dwc->eps[1]; | |
265b70a7 PZ |
1715 | ret = __dwc3_gadget_ep_enable(dep, &dwc3_gadget_ep0_desc, NULL, false, |
1716 | false); | |
72246da4 FB |
1717 | if (ret) { |
1718 | dev_err(dwc->dev, "failed to enable %s\n", dep->name); | |
d7be2952 | 1719 | goto err1; |
72246da4 FB |
1720 | } |
1721 | ||
1722 | /* begin to receive SETUP packets */ | |
c7fcdeb2 | 1723 | dwc->ep0state = EP0_SETUP_PHASE; |
72246da4 FB |
1724 | dwc3_ep0_out_start(dwc); |
1725 | ||
8698e2ac FB |
1726 | dwc3_gadget_enable_irq(dwc); |
1727 | ||
72246da4 FB |
1728 | return 0; |
1729 | ||
b0d7ffd4 | 1730 | err1: |
d7be2952 | 1731 | __dwc3_gadget_ep_disable(dwc->eps[0]); |
b0d7ffd4 FB |
1732 | |
1733 | err0: | |
72246da4 FB |
1734 | return ret; |
1735 | } | |
1736 | ||
d7be2952 FB |
1737 | static int dwc3_gadget_start(struct usb_gadget *g, |
1738 | struct usb_gadget_driver *driver) | |
72246da4 FB |
1739 | { |
1740 | struct dwc3 *dwc = gadget_to_dwc(g); | |
1741 | unsigned long flags; | |
d7be2952 | 1742 | int ret = 0; |
8698e2ac | 1743 | int irq; |
72246da4 | 1744 | |
d7be2952 FB |
1745 | irq = platform_get_irq(to_platform_device(dwc->dev), 0); |
1746 | ret = request_threaded_irq(irq, dwc3_interrupt, dwc3_thread_interrupt, | |
1747 | IRQF_SHARED, "dwc3", dwc->ev_buf); | |
1748 | if (ret) { | |
1749 | dev_err(dwc->dev, "failed to request irq #%d --> %d\n", | |
1750 | irq, ret); | |
1751 | goto err0; | |
1752 | } | |
3f308d17 | 1753 | dwc->irq_gadget = irq; |
d7be2952 | 1754 | |
72246da4 | 1755 | spin_lock_irqsave(&dwc->lock, flags); |
d7be2952 FB |
1756 | if (dwc->gadget_driver) { |
1757 | dev_err(dwc->dev, "%s is already bound to %s\n", | |
1758 | dwc->gadget.name, | |
1759 | dwc->gadget_driver->driver.name); | |
1760 | ret = -EBUSY; | |
1761 | goto err1; | |
1762 | } | |
1763 | ||
1764 | dwc->gadget_driver = driver; | |
1765 | ||
fc8bb91b FB |
1766 | if (pm_runtime_active(dwc->dev)) |
1767 | __dwc3_gadget_start(dwc); | |
1768 | ||
d7be2952 FB |
1769 | spin_unlock_irqrestore(&dwc->lock, flags); |
1770 | ||
1771 | return 0; | |
1772 | ||
1773 | err1: | |
1774 | spin_unlock_irqrestore(&dwc->lock, flags); | |
1775 | free_irq(irq, dwc); | |
1776 | ||
1777 | err0: | |
1778 | return ret; | |
1779 | } | |
72246da4 | 1780 | |
d7be2952 FB |
1781 | static void __dwc3_gadget_stop(struct dwc3 *dwc) |
1782 | { | |
8698e2ac | 1783 | dwc3_gadget_disable_irq(dwc); |
72246da4 FB |
1784 | __dwc3_gadget_ep_disable(dwc->eps[0]); |
1785 | __dwc3_gadget_ep_disable(dwc->eps[1]); | |
d7be2952 | 1786 | } |
72246da4 | 1787 | |
d7be2952 FB |
1788 | static int dwc3_gadget_stop(struct usb_gadget *g) |
1789 | { | |
1790 | struct dwc3 *dwc = gadget_to_dwc(g); | |
1791 | unsigned long flags; | |
72246da4 | 1792 | |
d7be2952 FB |
1793 | spin_lock_irqsave(&dwc->lock, flags); |
1794 | __dwc3_gadget_stop(dwc); | |
1795 | dwc->gadget_driver = NULL; | |
72246da4 FB |
1796 | spin_unlock_irqrestore(&dwc->lock, flags); |
1797 | ||
3f308d17 | 1798 | free_irq(dwc->irq_gadget, dwc->ev_buf); |
b0d7ffd4 | 1799 | |
72246da4 FB |
1800 | return 0; |
1801 | } | |
802fde98 | 1802 | |
72246da4 FB |
1803 | static const struct usb_gadget_ops dwc3_gadget_ops = { |
1804 | .get_frame = dwc3_gadget_get_frame, | |
1805 | .wakeup = dwc3_gadget_wakeup, | |
1806 | .set_selfpowered = dwc3_gadget_set_selfpowered, | |
1807 | .pullup = dwc3_gadget_pullup, | |
1808 | .udc_start = dwc3_gadget_start, | |
1809 | .udc_stop = dwc3_gadget_stop, | |
1810 | }; | |
1811 | ||
1812 | /* -------------------------------------------------------------------------- */ | |
1813 | ||
6a1e3ef4 FB |
1814 | static int dwc3_gadget_init_hw_endpoints(struct dwc3 *dwc, |
1815 | u8 num, u32 direction) | |
72246da4 FB |
1816 | { |
1817 | struct dwc3_ep *dep; | |
6a1e3ef4 | 1818 | u8 i; |
72246da4 | 1819 | |
6a1e3ef4 | 1820 | for (i = 0; i < num; i++) { |
d07fa665 | 1821 | u8 epnum = (i << 1) | (direction ? 1 : 0); |
72246da4 | 1822 | |
72246da4 | 1823 | dep = kzalloc(sizeof(*dep), GFP_KERNEL); |
734d5a53 | 1824 | if (!dep) |
72246da4 | 1825 | return -ENOMEM; |
72246da4 FB |
1826 | |
1827 | dep->dwc = dwc; | |
1828 | dep->number = epnum; | |
9aa62ae4 | 1829 | dep->direction = !!direction; |
2eb88016 | 1830 | dep->regs = dwc->regs + DWC3_DEP_BASE(epnum); |
72246da4 FB |
1831 | dwc->eps[epnum] = dep; |
1832 | ||
1833 | snprintf(dep->name, sizeof(dep->name), "ep%d%s", epnum >> 1, | |
1834 | (epnum & 1) ? "in" : "out"); | |
6a1e3ef4 | 1835 | |
72246da4 | 1836 | dep->endpoint.name = dep->name; |
74674cbf | 1837 | spin_lock_init(&dep->lock); |
72246da4 | 1838 | |
73815280 | 1839 | dwc3_trace(trace_dwc3_gadget, "initializing %s", dep->name); |
653df35e | 1840 | |
72246da4 | 1841 | if (epnum == 0 || epnum == 1) { |
e117e742 | 1842 | usb_ep_set_maxpacket_limit(&dep->endpoint, 512); |
6048e4c6 | 1843 | dep->endpoint.maxburst = 1; |
72246da4 FB |
1844 | dep->endpoint.ops = &dwc3_gadget_ep0_ops; |
1845 | if (!epnum) | |
1846 | dwc->gadget.ep0 = &dep->endpoint; | |
1847 | } else { | |
1848 | int ret; | |
1849 | ||
e117e742 | 1850 | usb_ep_set_maxpacket_limit(&dep->endpoint, 1024); |
12d36c16 | 1851 | dep->endpoint.max_streams = 15; |
72246da4 FB |
1852 | dep->endpoint.ops = &dwc3_gadget_ep_ops; |
1853 | list_add_tail(&dep->endpoint.ep_list, | |
1854 | &dwc->gadget.ep_list); | |
1855 | ||
1856 | ret = dwc3_alloc_trb_pool(dep); | |
25b8ff68 | 1857 | if (ret) |
72246da4 | 1858 | return ret; |
72246da4 | 1859 | } |
25b8ff68 | 1860 | |
a474d3b7 RB |
1861 | if (epnum == 0 || epnum == 1) { |
1862 | dep->endpoint.caps.type_control = true; | |
1863 | } else { | |
1864 | dep->endpoint.caps.type_iso = true; | |
1865 | dep->endpoint.caps.type_bulk = true; | |
1866 | dep->endpoint.caps.type_int = true; | |
1867 | } | |
1868 | ||
1869 | dep->endpoint.caps.dir_in = !!direction; | |
1870 | dep->endpoint.caps.dir_out = !direction; | |
1871 | ||
aa3342c8 FB |
1872 | INIT_LIST_HEAD(&dep->pending_list); |
1873 | INIT_LIST_HEAD(&dep->started_list); | |
72246da4 FB |
1874 | } |
1875 | ||
1876 | return 0; | |
1877 | } | |
1878 | ||
6a1e3ef4 FB |
1879 | static int dwc3_gadget_init_endpoints(struct dwc3 *dwc) |
1880 | { | |
1881 | int ret; | |
1882 | ||
1883 | INIT_LIST_HEAD(&dwc->gadget.ep_list); | |
1884 | ||
1885 | ret = dwc3_gadget_init_hw_endpoints(dwc, dwc->num_out_eps, 0); | |
1886 | if (ret < 0) { | |
73815280 FB |
1887 | dwc3_trace(trace_dwc3_gadget, |
1888 | "failed to allocate OUT endpoints"); | |
6a1e3ef4 FB |
1889 | return ret; |
1890 | } | |
1891 | ||
1892 | ret = dwc3_gadget_init_hw_endpoints(dwc, dwc->num_in_eps, 1); | |
1893 | if (ret < 0) { | |
73815280 FB |
1894 | dwc3_trace(trace_dwc3_gadget, |
1895 | "failed to allocate IN endpoints"); | |
6a1e3ef4 FB |
1896 | return ret; |
1897 | } | |
1898 | ||
1899 | return 0; | |
1900 | } | |
1901 | ||
72246da4 FB |
1902 | static void dwc3_gadget_free_endpoints(struct dwc3 *dwc) |
1903 | { | |
1904 | struct dwc3_ep *dep; | |
1905 | u8 epnum; | |
1906 | ||
1907 | for (epnum = 0; epnum < DWC3_ENDPOINTS_NUM; epnum++) { | |
1908 | dep = dwc->eps[epnum]; | |
6a1e3ef4 FB |
1909 | if (!dep) |
1910 | continue; | |
5bf8fae3 GC |
1911 | /* |
1912 | * Physical endpoints 0 and 1 are special; they form the | |
1913 | * bi-directional USB endpoint 0. | |
1914 | * | |
1915 | * For those two physical endpoints, we don't allocate a TRB | |
1916 | * pool nor do we add them the endpoints list. Due to that, we | |
1917 | * shouldn't do these two operations otherwise we would end up | |
1918 | * with all sorts of bugs when removing dwc3.ko. | |
1919 | */ | |
1920 | if (epnum != 0 && epnum != 1) { | |
1921 | dwc3_free_trb_pool(dep); | |
72246da4 | 1922 | list_del(&dep->endpoint.ep_list); |
5bf8fae3 | 1923 | } |
72246da4 FB |
1924 | |
1925 | kfree(dep); | |
1926 | } | |
1927 | } | |
1928 | ||
72246da4 | 1929 | /* -------------------------------------------------------------------------- */ |
e5caff68 | 1930 | |
e5ba5ec8 PA |
1931 | static int __dwc3_cleanup_done_trbs(struct dwc3 *dwc, struct dwc3_ep *dep, |
1932 | struct dwc3_request *req, struct dwc3_trb *trb, | |
72246da4 FB |
1933 | const struct dwc3_event_depevt *event, int status) |
1934 | { | |
72246da4 FB |
1935 | unsigned int count; |
1936 | unsigned int s_pkt = 0; | |
d6d6ec7b | 1937 | unsigned int trb_status; |
72246da4 | 1938 | |
2c4cbe6e FB |
1939 | trace_dwc3_complete_trb(dep, trb); |
1940 | ||
e5ba5ec8 PA |
1941 | if ((trb->ctrl & DWC3_TRB_CTRL_HWO) && status != -ESHUTDOWN) |
1942 | /* | |
1943 | * We continue despite the error. There is not much we | |
1944 | * can do. If we don't clean it up we loop forever. If | |
1945 | * we skip the TRB then it gets overwritten after a | |
1946 | * while since we use them in a ring buffer. A BUG() | |
1947 | * would help. Lets hope that if this occurs, someone | |
1948 | * fixes the root cause instead of looking away :) | |
1949 | */ | |
1950 | dev_err(dwc->dev, "%s's TRB (%p) still owned by HW\n", | |
1951 | dep->name, trb); | |
1952 | count = trb->size & DWC3_TRB_SIZE_MASK; | |
1953 | ||
1954 | if (dep->direction) { | |
1955 | if (count) { | |
1956 | trb_status = DWC3_TRB_SIZE_TRBSTS(trb->size); | |
1957 | if (trb_status == DWC3_TRBSTS_MISSED_ISOC) { | |
ec5e795c | 1958 | dwc3_trace(trace_dwc3_gadget, |
60cfb37a | 1959 | "%s: incomplete IN transfer", |
e5ba5ec8 PA |
1960 | dep->name); |
1961 | /* | |
1962 | * If missed isoc occurred and there is | |
1963 | * no request queued then issue END | |
1964 | * TRANSFER, so that core generates | |
1965 | * next xfernotready and we will issue | |
1966 | * a fresh START TRANSFER. | |
1967 | * If there are still queued request | |
1968 | * then wait, do not issue either END | |
1969 | * or UPDATE TRANSFER, just attach next | |
aa3342c8 | 1970 | * request in pending_list during |
e5ba5ec8 PA |
1971 | * giveback.If any future queued request |
1972 | * is successfully transferred then we | |
1973 | * will issue UPDATE TRANSFER for all | |
aa3342c8 | 1974 | * request in the pending_list. |
e5ba5ec8 PA |
1975 | */ |
1976 | dep->flags |= DWC3_EP_MISSED_ISOC; | |
1977 | } else { | |
1978 | dev_err(dwc->dev, "incomplete IN transfer %s\n", | |
1979 | dep->name); | |
1980 | status = -ECONNRESET; | |
1981 | } | |
1982 | } else { | |
1983 | dep->flags &= ~DWC3_EP_MISSED_ISOC; | |
1984 | } | |
1985 | } else { | |
1986 | if (count && (event->status & DEPEVT_STATUS_SHORT)) | |
1987 | s_pkt = 1; | |
1988 | } | |
1989 | ||
1990 | /* | |
1991 | * We assume here we will always receive the entire data block | |
1992 | * which we should receive. Meaning, if we program RX to | |
1993 | * receive 4K but we receive only 2K, we assume that's all we | |
1994 | * should receive and we simply bounce the request back to the | |
1995 | * gadget driver for further processing. | |
1996 | */ | |
1997 | req->request.actual += req->request.length - count; | |
1998 | if (s_pkt) | |
1999 | return 1; | |
2000 | if ((event->status & DEPEVT_STATUS_LST) && | |
2001 | (trb->ctrl & (DWC3_TRB_CTRL_LST | | |
2002 | DWC3_TRB_CTRL_HWO))) | |
2003 | return 1; | |
2004 | if ((event->status & DEPEVT_STATUS_IOC) && | |
2005 | (trb->ctrl & DWC3_TRB_CTRL_IOC)) | |
2006 | return 1; | |
2007 | return 0; | |
2008 | } | |
2009 | ||
2010 | static int dwc3_cleanup_done_reqs(struct dwc3 *dwc, struct dwc3_ep *dep, | |
2011 | const struct dwc3_event_depevt *event, int status) | |
2012 | { | |
2013 | struct dwc3_request *req; | |
2014 | struct dwc3_trb *trb; | |
2015 | unsigned int slot; | |
2016 | unsigned int i; | |
2017 | int ret; | |
2018 | ||
72246da4 | 2019 | do { |
aa3342c8 | 2020 | req = next_request(&dep->started_list); |
ac7bdcc1 | 2021 | if (WARN_ON_ONCE(!req)) |
d115d705 | 2022 | return 1; |
ac7bdcc1 | 2023 | |
d115d705 VS |
2024 | i = 0; |
2025 | do { | |
53fd8818 | 2026 | slot = req->first_trb_index + i; |
36b68aae | 2027 | if (slot == DWC3_TRB_NUM - 1) |
d115d705 VS |
2028 | slot++; |
2029 | slot %= DWC3_TRB_NUM; | |
2030 | trb = &dep->trb_pool[slot]; | |
2031 | ||
2032 | ret = __dwc3_cleanup_done_trbs(dwc, dep, req, trb, | |
2033 | event, status); | |
2034 | if (ret) | |
2035 | break; | |
2036 | } while (++i < req->request.num_mapped_sgs); | |
2037 | ||
2038 | dwc3_gadget_giveback(dep, req, status); | |
e5ba5ec8 PA |
2039 | |
2040 | if (ret) | |
72246da4 | 2041 | break; |
d115d705 | 2042 | } while (1); |
72246da4 | 2043 | |
4cb42217 FB |
2044 | /* |
2045 | * Our endpoint might get disabled by another thread during | |
2046 | * dwc3_gadget_giveback(). If that happens, we're just gonna return 1 | |
2047 | * early on so DWC3_EP_BUSY flag gets cleared | |
2048 | */ | |
2049 | if (!dep->endpoint.desc) | |
2050 | return 1; | |
2051 | ||
cdc359dd | 2052 | if (usb_endpoint_xfer_isoc(dep->endpoint.desc) && |
aa3342c8 FB |
2053 | list_empty(&dep->started_list)) { |
2054 | if (list_empty(&dep->pending_list)) { | |
cdc359dd PA |
2055 | /* |
2056 | * If there is no entry in request list then do | |
2057 | * not issue END TRANSFER now. Just set PENDING | |
2058 | * flag, so that END TRANSFER is issued when an | |
2059 | * entry is added into request list. | |
2060 | */ | |
2061 | dep->flags = DWC3_EP_PENDING_REQUEST; | |
2062 | } else { | |
b992e681 | 2063 | dwc3_stop_active_transfer(dwc, dep->number, true); |
cdc359dd PA |
2064 | dep->flags = DWC3_EP_ENABLED; |
2065 | } | |
7efea86c PA |
2066 | return 1; |
2067 | } | |
2068 | ||
9cad39fe KL |
2069 | if (usb_endpoint_xfer_isoc(dep->endpoint.desc)) |
2070 | if ((event->status & DEPEVT_STATUS_IOC) && | |
2071 | (trb->ctrl & DWC3_TRB_CTRL_IOC)) | |
2072 | return 0; | |
72246da4 FB |
2073 | return 1; |
2074 | } | |
2075 | ||
2076 | static void dwc3_endpoint_transfer_complete(struct dwc3 *dwc, | |
029d97ff | 2077 | struct dwc3_ep *dep, const struct dwc3_event_depevt *event) |
72246da4 FB |
2078 | { |
2079 | unsigned status = 0; | |
2080 | int clean_busy; | |
e18b7975 FB |
2081 | u32 is_xfer_complete; |
2082 | ||
2083 | is_xfer_complete = (event->endpoint_event == DWC3_DEPEVT_XFERCOMPLETE); | |
72246da4 FB |
2084 | |
2085 | if (event->status & DEPEVT_STATUS_BUSERR) | |
2086 | status = -ECONNRESET; | |
2087 | ||
1d046793 | 2088 | clean_busy = dwc3_cleanup_done_reqs(dwc, dep, event, status); |
4cb42217 | 2089 | if (clean_busy && (!dep->endpoint.desc || is_xfer_complete || |
e18b7975 | 2090 | usb_endpoint_xfer_isoc(dep->endpoint.desc))) |
72246da4 | 2091 | dep->flags &= ~DWC3_EP_BUSY; |
fae2b904 FB |
2092 | |
2093 | /* | |
2094 | * WORKAROUND: This is the 2nd half of U1/U2 -> U0 workaround. | |
2095 | * See dwc3_gadget_linksts_change_interrupt() for 1st half. | |
2096 | */ | |
2097 | if (dwc->revision < DWC3_REVISION_183A) { | |
2098 | u32 reg; | |
2099 | int i; | |
2100 | ||
2101 | for (i = 0; i < DWC3_ENDPOINTS_NUM; i++) { | |
348e026f | 2102 | dep = dwc->eps[i]; |
fae2b904 FB |
2103 | |
2104 | if (!(dep->flags & DWC3_EP_ENABLED)) | |
2105 | continue; | |
2106 | ||
aa3342c8 | 2107 | if (!list_empty(&dep->started_list)) |
fae2b904 FB |
2108 | return; |
2109 | } | |
2110 | ||
2111 | reg = dwc3_readl(dwc->regs, DWC3_DCTL); | |
2112 | reg |= dwc->u1u2; | |
2113 | dwc3_writel(dwc->regs, DWC3_DCTL, reg); | |
2114 | ||
2115 | dwc->u1u2 = 0; | |
2116 | } | |
8a1a9c9e | 2117 | |
4cb42217 FB |
2118 | /* |
2119 | * Our endpoint might get disabled by another thread during | |
2120 | * dwc3_gadget_giveback(). If that happens, we're just gonna return 1 | |
2121 | * early on so DWC3_EP_BUSY flag gets cleared | |
2122 | */ | |
2123 | if (!dep->endpoint.desc) | |
2124 | return; | |
2125 | ||
e6e709b7 | 2126 | if (!usb_endpoint_xfer_isoc(dep->endpoint.desc)) { |
8a1a9c9e FB |
2127 | int ret; |
2128 | ||
4fae2e3e | 2129 | ret = __dwc3_gadget_kick_transfer(dep, 0); |
8a1a9c9e FB |
2130 | if (!ret || ret == -EBUSY) |
2131 | return; | |
2132 | } | |
72246da4 FB |
2133 | } |
2134 | ||
72246da4 FB |
2135 | static void dwc3_endpoint_interrupt(struct dwc3 *dwc, |
2136 | const struct dwc3_event_depevt *event) | |
2137 | { | |
2138 | struct dwc3_ep *dep; | |
2139 | u8 epnum = event->endpoint_number; | |
2140 | ||
2141 | dep = dwc->eps[epnum]; | |
2142 | ||
3336abb5 FB |
2143 | if (!(dep->flags & DWC3_EP_ENABLED)) |
2144 | return; | |
2145 | ||
72246da4 FB |
2146 | if (epnum == 0 || epnum == 1) { |
2147 | dwc3_ep0_interrupt(dwc, event); | |
2148 | return; | |
2149 | } | |
2150 | ||
2151 | switch (event->endpoint_event) { | |
2152 | case DWC3_DEPEVT_XFERCOMPLETE: | |
b4996a86 | 2153 | dep->resource_index = 0; |
c2df85ca | 2154 | |
16e78db7 | 2155 | if (usb_endpoint_xfer_isoc(dep->endpoint.desc)) { |
ec5e795c | 2156 | dwc3_trace(trace_dwc3_gadget, |
60cfb37a | 2157 | "%s is an Isochronous endpoint", |
72246da4 FB |
2158 | dep->name); |
2159 | return; | |
2160 | } | |
2161 | ||
029d97ff | 2162 | dwc3_endpoint_transfer_complete(dwc, dep, event); |
72246da4 FB |
2163 | break; |
2164 | case DWC3_DEPEVT_XFERINPROGRESS: | |
029d97ff | 2165 | dwc3_endpoint_transfer_complete(dwc, dep, event); |
72246da4 FB |
2166 | break; |
2167 | case DWC3_DEPEVT_XFERNOTREADY: | |
16e78db7 | 2168 | if (usb_endpoint_xfer_isoc(dep->endpoint.desc)) { |
72246da4 FB |
2169 | dwc3_gadget_start_isoc(dwc, dep, event); |
2170 | } else { | |
6bb4fe12 | 2171 | int active; |
72246da4 FB |
2172 | int ret; |
2173 | ||
6bb4fe12 FB |
2174 | active = event->status & DEPEVT_STATUS_TRANSFER_ACTIVE; |
2175 | ||
73815280 | 2176 | dwc3_trace(trace_dwc3_gadget, "%s: reason %s", |
6bb4fe12 | 2177 | dep->name, active ? "Transfer Active" |
72246da4 FB |
2178 | : "Transfer Not Active"); |
2179 | ||
4fae2e3e | 2180 | ret = __dwc3_gadget_kick_transfer(dep, 0); |
72246da4 FB |
2181 | if (!ret || ret == -EBUSY) |
2182 | return; | |
2183 | ||
ec5e795c | 2184 | dwc3_trace(trace_dwc3_gadget, |
60cfb37a | 2185 | "%s: failed to kick transfers", |
72246da4 FB |
2186 | dep->name); |
2187 | } | |
2188 | ||
879631aa FB |
2189 | break; |
2190 | case DWC3_DEPEVT_STREAMEVT: | |
16e78db7 | 2191 | if (!usb_endpoint_xfer_bulk(dep->endpoint.desc)) { |
879631aa FB |
2192 | dev_err(dwc->dev, "Stream event for non-Bulk %s\n", |
2193 | dep->name); | |
2194 | return; | |
2195 | } | |
2196 | ||
2197 | switch (event->status) { | |
2198 | case DEPEVT_STREAMEVT_FOUND: | |
73815280 FB |
2199 | dwc3_trace(trace_dwc3_gadget, |
2200 | "Stream %d found and started", | |
879631aa FB |
2201 | event->parameters); |
2202 | ||
2203 | break; | |
2204 | case DEPEVT_STREAMEVT_NOTFOUND: | |
2205 | /* FALLTHROUGH */ | |
2206 | default: | |
ec5e795c | 2207 | dwc3_trace(trace_dwc3_gadget, |
60cfb37a | 2208 | "unable to find suitable stream"); |
879631aa | 2209 | } |
72246da4 FB |
2210 | break; |
2211 | case DWC3_DEPEVT_RXTXFIFOEVT: | |
60cfb37a | 2212 | dwc3_trace(trace_dwc3_gadget, "%s FIFO Overrun", dep->name); |
72246da4 | 2213 | break; |
72246da4 | 2214 | case DWC3_DEPEVT_EPCMDCMPLT: |
73815280 | 2215 | dwc3_trace(trace_dwc3_gadget, "Endpoint Command Complete"); |
72246da4 FB |
2216 | break; |
2217 | } | |
2218 | } | |
2219 | ||
2220 | static void dwc3_disconnect_gadget(struct dwc3 *dwc) | |
2221 | { | |
2222 | if (dwc->gadget_driver && dwc->gadget_driver->disconnect) { | |
2223 | spin_unlock(&dwc->lock); | |
2224 | dwc->gadget_driver->disconnect(&dwc->gadget); | |
2225 | spin_lock(&dwc->lock); | |
2226 | } | |
2227 | } | |
2228 | ||
bc5ba2e0 FB |
2229 | static void dwc3_suspend_gadget(struct dwc3 *dwc) |
2230 | { | |
73a30bfc | 2231 | if (dwc->gadget_driver && dwc->gadget_driver->suspend) { |
bc5ba2e0 FB |
2232 | spin_unlock(&dwc->lock); |
2233 | dwc->gadget_driver->suspend(&dwc->gadget); | |
2234 | spin_lock(&dwc->lock); | |
2235 | } | |
2236 | } | |
2237 | ||
2238 | static void dwc3_resume_gadget(struct dwc3 *dwc) | |
2239 | { | |
73a30bfc | 2240 | if (dwc->gadget_driver && dwc->gadget_driver->resume) { |
bc5ba2e0 FB |
2241 | spin_unlock(&dwc->lock); |
2242 | dwc->gadget_driver->resume(&dwc->gadget); | |
5c7b3b02 | 2243 | spin_lock(&dwc->lock); |
8e74475b FB |
2244 | } |
2245 | } | |
2246 | ||
2247 | static void dwc3_reset_gadget(struct dwc3 *dwc) | |
2248 | { | |
2249 | if (!dwc->gadget_driver) | |
2250 | return; | |
2251 | ||
2252 | if (dwc->gadget.speed != USB_SPEED_UNKNOWN) { | |
2253 | spin_unlock(&dwc->lock); | |
2254 | usb_gadget_udc_reset(&dwc->gadget, dwc->gadget_driver); | |
bc5ba2e0 FB |
2255 | spin_lock(&dwc->lock); |
2256 | } | |
2257 | } | |
2258 | ||
b992e681 | 2259 | static void dwc3_stop_active_transfer(struct dwc3 *dwc, u32 epnum, bool force) |
72246da4 FB |
2260 | { |
2261 | struct dwc3_ep *dep; | |
2262 | struct dwc3_gadget_ep_cmd_params params; | |
2263 | u32 cmd; | |
2264 | int ret; | |
2265 | ||
2266 | dep = dwc->eps[epnum]; | |
2267 | ||
b4996a86 | 2268 | if (!dep->resource_index) |
3daf74d7 PA |
2269 | return; |
2270 | ||
57911504 PA |
2271 | /* |
2272 | * NOTICE: We are violating what the Databook says about the | |
2273 | * EndTransfer command. Ideally we would _always_ wait for the | |
2274 | * EndTransfer Command Completion IRQ, but that's causing too | |
2275 | * much trouble synchronizing between us and gadget driver. | |
2276 | * | |
2277 | * We have discussed this with the IP Provider and it was | |
2278 | * suggested to giveback all requests here, but give HW some | |
2279 | * extra time to synchronize with the interconnect. We're using | |
dc93b41a | 2280 | * an arbitrary 100us delay for that. |
57911504 PA |
2281 | * |
2282 | * Note also that a similar handling was tested by Synopsys | |
2283 | * (thanks a lot Paul) and nothing bad has come out of it. | |
2284 | * In short, what we're doing is: | |
2285 | * | |
2286 | * - Issue EndTransfer WITH CMDIOC bit set | |
2287 | * - Wait 100us | |
2288 | */ | |
2289 | ||
3daf74d7 | 2290 | cmd = DWC3_DEPCMD_ENDTRANSFER; |
b992e681 PZ |
2291 | cmd |= force ? DWC3_DEPCMD_HIPRI_FORCERM : 0; |
2292 | cmd |= DWC3_DEPCMD_CMDIOC; | |
b4996a86 | 2293 | cmd |= DWC3_DEPCMD_PARAM(dep->resource_index); |
3daf74d7 | 2294 | memset(¶ms, 0, sizeof(params)); |
2cd4718d | 2295 | ret = dwc3_send_gadget_ep_cmd(dep, cmd, ¶ms); |
3daf74d7 | 2296 | WARN_ON_ONCE(ret); |
b4996a86 | 2297 | dep->resource_index = 0; |
041d81f4 | 2298 | dep->flags &= ~DWC3_EP_BUSY; |
57911504 | 2299 | udelay(100); |
72246da4 FB |
2300 | } |
2301 | ||
2302 | static void dwc3_stop_active_transfers(struct dwc3 *dwc) | |
2303 | { | |
2304 | u32 epnum; | |
2305 | ||
2306 | for (epnum = 2; epnum < DWC3_ENDPOINTS_NUM; epnum++) { | |
2307 | struct dwc3_ep *dep; | |
2308 | ||
2309 | dep = dwc->eps[epnum]; | |
6a1e3ef4 FB |
2310 | if (!dep) |
2311 | continue; | |
2312 | ||
72246da4 FB |
2313 | if (!(dep->flags & DWC3_EP_ENABLED)) |
2314 | continue; | |
2315 | ||
624407f9 | 2316 | dwc3_remove_requests(dwc, dep); |
72246da4 FB |
2317 | } |
2318 | } | |
2319 | ||
2320 | static void dwc3_clear_stall_all_ep(struct dwc3 *dwc) | |
2321 | { | |
2322 | u32 epnum; | |
2323 | ||
2324 | for (epnum = 1; epnum < DWC3_ENDPOINTS_NUM; epnum++) { | |
2325 | struct dwc3_ep *dep; | |
72246da4 FB |
2326 | int ret; |
2327 | ||
2328 | dep = dwc->eps[epnum]; | |
6a1e3ef4 FB |
2329 | if (!dep) |
2330 | continue; | |
72246da4 FB |
2331 | |
2332 | if (!(dep->flags & DWC3_EP_STALL)) | |
2333 | continue; | |
2334 | ||
2335 | dep->flags &= ~DWC3_EP_STALL; | |
2336 | ||
50c763f8 | 2337 | ret = dwc3_send_clear_stall_ep_cmd(dep); |
72246da4 FB |
2338 | WARN_ON_ONCE(ret); |
2339 | } | |
2340 | } | |
2341 | ||
2342 | static void dwc3_gadget_disconnect_interrupt(struct dwc3 *dwc) | |
2343 | { | |
c4430a26 FB |
2344 | int reg; |
2345 | ||
72246da4 FB |
2346 | reg = dwc3_readl(dwc->regs, DWC3_DCTL); |
2347 | reg &= ~DWC3_DCTL_INITU1ENA; | |
2348 | dwc3_writel(dwc->regs, DWC3_DCTL, reg); | |
2349 | ||
2350 | reg &= ~DWC3_DCTL_INITU2ENA; | |
2351 | dwc3_writel(dwc->regs, DWC3_DCTL, reg); | |
72246da4 | 2352 | |
72246da4 FB |
2353 | dwc3_disconnect_gadget(dwc); |
2354 | ||
2355 | dwc->gadget.speed = USB_SPEED_UNKNOWN; | |
df62df56 | 2356 | dwc->setup_packet_pending = false; |
06a374ed | 2357 | usb_gadget_set_state(&dwc->gadget, USB_STATE_NOTATTACHED); |
fc8bb91b FB |
2358 | |
2359 | dwc->connected = false; | |
72246da4 FB |
2360 | } |
2361 | ||
72246da4 FB |
2362 | static void dwc3_gadget_reset_interrupt(struct dwc3 *dwc) |
2363 | { | |
2364 | u32 reg; | |
2365 | ||
fc8bb91b FB |
2366 | dwc->connected = true; |
2367 | ||
df62df56 FB |
2368 | /* |
2369 | * WORKAROUND: DWC3 revisions <1.88a have an issue which | |
2370 | * would cause a missing Disconnect Event if there's a | |
2371 | * pending Setup Packet in the FIFO. | |
2372 | * | |
2373 | * There's no suggested workaround on the official Bug | |
2374 | * report, which states that "unless the driver/application | |
2375 | * is doing any special handling of a disconnect event, | |
2376 | * there is no functional issue". | |
2377 | * | |
2378 | * Unfortunately, it turns out that we _do_ some special | |
2379 | * handling of a disconnect event, namely complete all | |
2380 | * pending transfers, notify gadget driver of the | |
2381 | * disconnection, and so on. | |
2382 | * | |
2383 | * Our suggested workaround is to follow the Disconnect | |
2384 | * Event steps here, instead, based on a setup_packet_pending | |
b5d335e5 FB |
2385 | * flag. Such flag gets set whenever we have a SETUP_PENDING |
2386 | * status for EP0 TRBs and gets cleared on XferComplete for the | |
df62df56 FB |
2387 | * same endpoint. |
2388 | * | |
2389 | * Refers to: | |
2390 | * | |
2391 | * STAR#9000466709: RTL: Device : Disconnect event not | |
2392 | * generated if setup packet pending in FIFO | |
2393 | */ | |
2394 | if (dwc->revision < DWC3_REVISION_188A) { | |
2395 | if (dwc->setup_packet_pending) | |
2396 | dwc3_gadget_disconnect_interrupt(dwc); | |
2397 | } | |
2398 | ||
8e74475b | 2399 | dwc3_reset_gadget(dwc); |
72246da4 FB |
2400 | |
2401 | reg = dwc3_readl(dwc->regs, DWC3_DCTL); | |
2402 | reg &= ~DWC3_DCTL_TSTCTRL_MASK; | |
2403 | dwc3_writel(dwc->regs, DWC3_DCTL, reg); | |
3b637367 | 2404 | dwc->test_mode = false; |
72246da4 FB |
2405 | |
2406 | dwc3_stop_active_transfers(dwc); | |
2407 | dwc3_clear_stall_all_ep(dwc); | |
2408 | ||
2409 | /* Reset device address to zero */ | |
2410 | reg = dwc3_readl(dwc->regs, DWC3_DCFG); | |
2411 | reg &= ~(DWC3_DCFG_DEVADDR_MASK); | |
2412 | dwc3_writel(dwc->regs, DWC3_DCFG, reg); | |
72246da4 FB |
2413 | } |
2414 | ||
2415 | static void dwc3_update_ram_clk_sel(struct dwc3 *dwc, u32 speed) | |
2416 | { | |
2417 | u32 reg; | |
2418 | u32 usb30_clock = DWC3_GCTL_CLK_BUS; | |
2419 | ||
2420 | /* | |
2421 | * We change the clock only at SS but I dunno why I would want to do | |
2422 | * this. Maybe it becomes part of the power saving plan. | |
2423 | */ | |
2424 | ||
ee5cd41c JY |
2425 | if ((speed != DWC3_DSTS_SUPERSPEED) && |
2426 | (speed != DWC3_DSTS_SUPERSPEED_PLUS)) | |
72246da4 FB |
2427 | return; |
2428 | ||
2429 | /* | |
2430 | * RAMClkSel is reset to 0 after USB reset, so it must be reprogrammed | |
2431 | * each time on Connect Done. | |
2432 | */ | |
2433 | if (!usb30_clock) | |
2434 | return; | |
2435 | ||
2436 | reg = dwc3_readl(dwc->regs, DWC3_GCTL); | |
2437 | reg |= DWC3_GCTL_RAMCLKSEL(usb30_clock); | |
2438 | dwc3_writel(dwc->regs, DWC3_GCTL, reg); | |
2439 | } | |
2440 | ||
72246da4 FB |
2441 | static void dwc3_gadget_conndone_interrupt(struct dwc3 *dwc) |
2442 | { | |
72246da4 FB |
2443 | struct dwc3_ep *dep; |
2444 | int ret; | |
2445 | u32 reg; | |
2446 | u8 speed; | |
2447 | ||
72246da4 FB |
2448 | reg = dwc3_readl(dwc->regs, DWC3_DSTS); |
2449 | speed = reg & DWC3_DSTS_CONNECTSPD; | |
2450 | dwc->speed = speed; | |
2451 | ||
2452 | dwc3_update_ram_clk_sel(dwc, speed); | |
2453 | ||
2454 | switch (speed) { | |
2da9ad76 | 2455 | case DWC3_DSTS_SUPERSPEED_PLUS: |
7580862b JY |
2456 | dwc3_gadget_ep0_desc.wMaxPacketSize = cpu_to_le16(512); |
2457 | dwc->gadget.ep0->maxpacket = 512; | |
2458 | dwc->gadget.speed = USB_SPEED_SUPER_PLUS; | |
2459 | break; | |
2da9ad76 | 2460 | case DWC3_DSTS_SUPERSPEED: |
05870c5b FB |
2461 | /* |
2462 | * WORKAROUND: DWC3 revisions <1.90a have an issue which | |
2463 | * would cause a missing USB3 Reset event. | |
2464 | * | |
2465 | * In such situations, we should force a USB3 Reset | |
2466 | * event by calling our dwc3_gadget_reset_interrupt() | |
2467 | * routine. | |
2468 | * | |
2469 | * Refers to: | |
2470 | * | |
2471 | * STAR#9000483510: RTL: SS : USB3 reset event may | |
2472 | * not be generated always when the link enters poll | |
2473 | */ | |
2474 | if (dwc->revision < DWC3_REVISION_190A) | |
2475 | dwc3_gadget_reset_interrupt(dwc); | |
2476 | ||
72246da4 FB |
2477 | dwc3_gadget_ep0_desc.wMaxPacketSize = cpu_to_le16(512); |
2478 | dwc->gadget.ep0->maxpacket = 512; | |
2479 | dwc->gadget.speed = USB_SPEED_SUPER; | |
2480 | break; | |
2da9ad76 | 2481 | case DWC3_DSTS_HIGHSPEED: |
72246da4 FB |
2482 | dwc3_gadget_ep0_desc.wMaxPacketSize = cpu_to_le16(64); |
2483 | dwc->gadget.ep0->maxpacket = 64; | |
2484 | dwc->gadget.speed = USB_SPEED_HIGH; | |
2485 | break; | |
2da9ad76 JY |
2486 | case DWC3_DSTS_FULLSPEED2: |
2487 | case DWC3_DSTS_FULLSPEED1: | |
72246da4 FB |
2488 | dwc3_gadget_ep0_desc.wMaxPacketSize = cpu_to_le16(64); |
2489 | dwc->gadget.ep0->maxpacket = 64; | |
2490 | dwc->gadget.speed = USB_SPEED_FULL; | |
2491 | break; | |
2da9ad76 | 2492 | case DWC3_DSTS_LOWSPEED: |
72246da4 FB |
2493 | dwc3_gadget_ep0_desc.wMaxPacketSize = cpu_to_le16(8); |
2494 | dwc->gadget.ep0->maxpacket = 8; | |
2495 | dwc->gadget.speed = USB_SPEED_LOW; | |
2496 | break; | |
2497 | } | |
2498 | ||
2b758350 PA |
2499 | /* Enable USB2 LPM Capability */ |
2500 | ||
ee5cd41c | 2501 | if ((dwc->revision > DWC3_REVISION_194A) && |
2da9ad76 JY |
2502 | (speed != DWC3_DSTS_SUPERSPEED) && |
2503 | (speed != DWC3_DSTS_SUPERSPEED_PLUS)) { | |
2b758350 PA |
2504 | reg = dwc3_readl(dwc->regs, DWC3_DCFG); |
2505 | reg |= DWC3_DCFG_LPM_CAP; | |
2506 | dwc3_writel(dwc->regs, DWC3_DCFG, reg); | |
2507 | ||
2508 | reg = dwc3_readl(dwc->regs, DWC3_DCTL); | |
2509 | reg &= ~(DWC3_DCTL_HIRD_THRES_MASK | DWC3_DCTL_L1_HIBER_EN); | |
2510 | ||
460d098c | 2511 | reg |= DWC3_DCTL_HIRD_THRES(dwc->hird_threshold); |
2b758350 | 2512 | |
80caf7d2 HR |
2513 | /* |
2514 | * When dwc3 revisions >= 2.40a, LPM Erratum is enabled and | |
2515 | * DCFG.LPMCap is set, core responses with an ACK and the | |
2516 | * BESL value in the LPM token is less than or equal to LPM | |
2517 | * NYET threshold. | |
2518 | */ | |
2519 | WARN_ONCE(dwc->revision < DWC3_REVISION_240A | |
2520 | && dwc->has_lpm_erratum, | |
2521 | "LPM Erratum not available on dwc3 revisisions < 2.40a\n"); | |
2522 | ||
2523 | if (dwc->has_lpm_erratum && dwc->revision >= DWC3_REVISION_240A) | |
2524 | reg |= DWC3_DCTL_LPM_ERRATA(dwc->lpm_nyet_threshold); | |
2525 | ||
356363bf FB |
2526 | dwc3_writel(dwc->regs, DWC3_DCTL, reg); |
2527 | } else { | |
2528 | reg = dwc3_readl(dwc->regs, DWC3_DCTL); | |
2529 | reg &= ~DWC3_DCTL_HIRD_THRES_MASK; | |
2b758350 PA |
2530 | dwc3_writel(dwc->regs, DWC3_DCTL, reg); |
2531 | } | |
2532 | ||
72246da4 | 2533 | dep = dwc->eps[0]; |
265b70a7 PZ |
2534 | ret = __dwc3_gadget_ep_enable(dep, &dwc3_gadget_ep0_desc, NULL, true, |
2535 | false); | |
72246da4 FB |
2536 | if (ret) { |
2537 | dev_err(dwc->dev, "failed to enable %s\n", dep->name); | |
2538 | return; | |
2539 | } | |
2540 | ||
2541 | dep = dwc->eps[1]; | |
265b70a7 PZ |
2542 | ret = __dwc3_gadget_ep_enable(dep, &dwc3_gadget_ep0_desc, NULL, true, |
2543 | false); | |
72246da4 FB |
2544 | if (ret) { |
2545 | dev_err(dwc->dev, "failed to enable %s\n", dep->name); | |
2546 | return; | |
2547 | } | |
2548 | ||
2549 | /* | |
2550 | * Configure PHY via GUSB3PIPECTLn if required. | |
2551 | * | |
2552 | * Update GTXFIFOSIZn | |
2553 | * | |
2554 | * In both cases reset values should be sufficient. | |
2555 | */ | |
2556 | } | |
2557 | ||
2558 | static void dwc3_gadget_wakeup_interrupt(struct dwc3 *dwc) | |
2559 | { | |
72246da4 FB |
2560 | /* |
2561 | * TODO take core out of low power mode when that's | |
2562 | * implemented. | |
2563 | */ | |
2564 | ||
ad14d4e0 JL |
2565 | if (dwc->gadget_driver && dwc->gadget_driver->resume) { |
2566 | spin_unlock(&dwc->lock); | |
2567 | dwc->gadget_driver->resume(&dwc->gadget); | |
2568 | spin_lock(&dwc->lock); | |
2569 | } | |
72246da4 FB |
2570 | } |
2571 | ||
2572 | static void dwc3_gadget_linksts_change_interrupt(struct dwc3 *dwc, | |
2573 | unsigned int evtinfo) | |
2574 | { | |
fae2b904 | 2575 | enum dwc3_link_state next = evtinfo & DWC3_LINK_STATE_MASK; |
0b0cc1cd FB |
2576 | unsigned int pwropt; |
2577 | ||
2578 | /* | |
2579 | * WORKAROUND: DWC3 < 2.50a have an issue when configured without | |
2580 | * Hibernation mode enabled which would show up when device detects | |
2581 | * host-initiated U3 exit. | |
2582 | * | |
2583 | * In that case, device will generate a Link State Change Interrupt | |
2584 | * from U3 to RESUME which is only necessary if Hibernation is | |
2585 | * configured in. | |
2586 | * | |
2587 | * There are no functional changes due to such spurious event and we | |
2588 | * just need to ignore it. | |
2589 | * | |
2590 | * Refers to: | |
2591 | * | |
2592 | * STAR#9000570034 RTL: SS Resume event generated in non-Hibernation | |
2593 | * operational mode | |
2594 | */ | |
2595 | pwropt = DWC3_GHWPARAMS1_EN_PWROPT(dwc->hwparams.hwparams1); | |
2596 | if ((dwc->revision < DWC3_REVISION_250A) && | |
2597 | (pwropt != DWC3_GHWPARAMS1_EN_PWROPT_HIB)) { | |
2598 | if ((dwc->link_state == DWC3_LINK_STATE_U3) && | |
2599 | (next == DWC3_LINK_STATE_RESUME)) { | |
73815280 FB |
2600 | dwc3_trace(trace_dwc3_gadget, |
2601 | "ignoring transition U3 -> Resume"); | |
0b0cc1cd FB |
2602 | return; |
2603 | } | |
2604 | } | |
fae2b904 FB |
2605 | |
2606 | /* | |
2607 | * WORKAROUND: DWC3 Revisions <1.83a have an issue which, depending | |
2608 | * on the link partner, the USB session might do multiple entry/exit | |
2609 | * of low power states before a transfer takes place. | |
2610 | * | |
2611 | * Due to this problem, we might experience lower throughput. The | |
2612 | * suggested workaround is to disable DCTL[12:9] bits if we're | |
2613 | * transitioning from U1/U2 to U0 and enable those bits again | |
2614 | * after a transfer completes and there are no pending transfers | |
2615 | * on any of the enabled endpoints. | |
2616 | * | |
2617 | * This is the first half of that workaround. | |
2618 | * | |
2619 | * Refers to: | |
2620 | * | |
2621 | * STAR#9000446952: RTL: Device SS : if U1/U2 ->U0 takes >128us | |
2622 | * core send LGO_Ux entering U0 | |
2623 | */ | |
2624 | if (dwc->revision < DWC3_REVISION_183A) { | |
2625 | if (next == DWC3_LINK_STATE_U0) { | |
2626 | u32 u1u2; | |
2627 | u32 reg; | |
2628 | ||
2629 | switch (dwc->link_state) { | |
2630 | case DWC3_LINK_STATE_U1: | |
2631 | case DWC3_LINK_STATE_U2: | |
2632 | reg = dwc3_readl(dwc->regs, DWC3_DCTL); | |
2633 | u1u2 = reg & (DWC3_DCTL_INITU2ENA | |
2634 | | DWC3_DCTL_ACCEPTU2ENA | |
2635 | | DWC3_DCTL_INITU1ENA | |
2636 | | DWC3_DCTL_ACCEPTU1ENA); | |
2637 | ||
2638 | if (!dwc->u1u2) | |
2639 | dwc->u1u2 = reg & u1u2; | |
2640 | ||
2641 | reg &= ~u1u2; | |
2642 | ||
2643 | dwc3_writel(dwc->regs, DWC3_DCTL, reg); | |
2644 | break; | |
2645 | default: | |
2646 | /* do nothing */ | |
2647 | break; | |
2648 | } | |
2649 | } | |
2650 | } | |
2651 | ||
bc5ba2e0 FB |
2652 | switch (next) { |
2653 | case DWC3_LINK_STATE_U1: | |
2654 | if (dwc->speed == USB_SPEED_SUPER) | |
2655 | dwc3_suspend_gadget(dwc); | |
2656 | break; | |
2657 | case DWC3_LINK_STATE_U2: | |
2658 | case DWC3_LINK_STATE_U3: | |
2659 | dwc3_suspend_gadget(dwc); | |
2660 | break; | |
2661 | case DWC3_LINK_STATE_RESUME: | |
2662 | dwc3_resume_gadget(dwc); | |
2663 | break; | |
2664 | default: | |
2665 | /* do nothing */ | |
2666 | break; | |
2667 | } | |
2668 | ||
e57ebc1d | 2669 | dwc->link_state = next; |
72246da4 FB |
2670 | } |
2671 | ||
e1dadd3b FB |
2672 | static void dwc3_gadget_hibernation_interrupt(struct dwc3 *dwc, |
2673 | unsigned int evtinfo) | |
2674 | { | |
2675 | unsigned int is_ss = evtinfo & BIT(4); | |
2676 | ||
2677 | /** | |
2678 | * WORKAROUND: DWC3 revison 2.20a with hibernation support | |
2679 | * have a known issue which can cause USB CV TD.9.23 to fail | |
2680 | * randomly. | |
2681 | * | |
2682 | * Because of this issue, core could generate bogus hibernation | |
2683 | * events which SW needs to ignore. | |
2684 | * | |
2685 | * Refers to: | |
2686 | * | |
2687 | * STAR#9000546576: Device Mode Hibernation: Issue in USB 2.0 | |
2688 | * Device Fallback from SuperSpeed | |
2689 | */ | |
2690 | if (is_ss ^ (dwc->speed == USB_SPEED_SUPER)) | |
2691 | return; | |
2692 | ||
2693 | /* enter hibernation here */ | |
2694 | } | |
2695 | ||
72246da4 FB |
2696 | static void dwc3_gadget_interrupt(struct dwc3 *dwc, |
2697 | const struct dwc3_event_devt *event) | |
2698 | { | |
2699 | switch (event->type) { | |
2700 | case DWC3_DEVICE_EVENT_DISCONNECT: | |
2701 | dwc3_gadget_disconnect_interrupt(dwc); | |
2702 | break; | |
2703 | case DWC3_DEVICE_EVENT_RESET: | |
2704 | dwc3_gadget_reset_interrupt(dwc); | |
2705 | break; | |
2706 | case DWC3_DEVICE_EVENT_CONNECT_DONE: | |
2707 | dwc3_gadget_conndone_interrupt(dwc); | |
2708 | break; | |
2709 | case DWC3_DEVICE_EVENT_WAKEUP: | |
2710 | dwc3_gadget_wakeup_interrupt(dwc); | |
2711 | break; | |
e1dadd3b FB |
2712 | case DWC3_DEVICE_EVENT_HIBER_REQ: |
2713 | if (dev_WARN_ONCE(dwc->dev, !dwc->has_hibernation, | |
2714 | "unexpected hibernation event\n")) | |
2715 | break; | |
2716 | ||
2717 | dwc3_gadget_hibernation_interrupt(dwc, event->event_info); | |
2718 | break; | |
72246da4 FB |
2719 | case DWC3_DEVICE_EVENT_LINK_STATUS_CHANGE: |
2720 | dwc3_gadget_linksts_change_interrupt(dwc, event->event_info); | |
2721 | break; | |
2722 | case DWC3_DEVICE_EVENT_EOPF: | |
73815280 | 2723 | dwc3_trace(trace_dwc3_gadget, "End of Periodic Frame"); |
72246da4 FB |
2724 | break; |
2725 | case DWC3_DEVICE_EVENT_SOF: | |
73815280 | 2726 | dwc3_trace(trace_dwc3_gadget, "Start of Periodic Frame"); |
72246da4 FB |
2727 | break; |
2728 | case DWC3_DEVICE_EVENT_ERRATIC_ERROR: | |
73815280 | 2729 | dwc3_trace(trace_dwc3_gadget, "Erratic Error"); |
72246da4 FB |
2730 | break; |
2731 | case DWC3_DEVICE_EVENT_CMD_CMPL: | |
73815280 | 2732 | dwc3_trace(trace_dwc3_gadget, "Command Complete"); |
72246da4 FB |
2733 | break; |
2734 | case DWC3_DEVICE_EVENT_OVERFLOW: | |
73815280 | 2735 | dwc3_trace(trace_dwc3_gadget, "Overflow"); |
72246da4 FB |
2736 | break; |
2737 | default: | |
e9f2aa87 | 2738 | dev_WARN(dwc->dev, "UNKNOWN IRQ %d\n", event->type); |
72246da4 FB |
2739 | } |
2740 | } | |
2741 | ||
2742 | static void dwc3_process_event_entry(struct dwc3 *dwc, | |
2743 | const union dwc3_event *event) | |
2744 | { | |
2c4cbe6e FB |
2745 | trace_dwc3_event(event->raw); |
2746 | ||
72246da4 FB |
2747 | /* Endpoint IRQ, handle it and return early */ |
2748 | if (event->type.is_devspec == 0) { | |
2749 | /* depevt */ | |
2750 | return dwc3_endpoint_interrupt(dwc, &event->depevt); | |
2751 | } | |
2752 | ||
2753 | switch (event->type.type) { | |
2754 | case DWC3_EVENT_TYPE_DEV: | |
2755 | dwc3_gadget_interrupt(dwc, &event->devt); | |
2756 | break; | |
2757 | /* REVISIT what to do with Carkit and I2C events ? */ | |
2758 | default: | |
2759 | dev_err(dwc->dev, "UNKNOWN IRQ type %d\n", event->raw); | |
2760 | } | |
2761 | } | |
2762 | ||
dea520a4 | 2763 | static irqreturn_t dwc3_process_event_buf(struct dwc3_event_buffer *evt) |
b15a762f | 2764 | { |
dea520a4 | 2765 | struct dwc3 *dwc = evt->dwc; |
b15a762f | 2766 | irqreturn_t ret = IRQ_NONE; |
f42f2447 | 2767 | int left; |
e8adfc30 | 2768 | u32 reg; |
b15a762f | 2769 | |
f42f2447 | 2770 | left = evt->count; |
b15a762f | 2771 | |
f42f2447 FB |
2772 | if (!(evt->flags & DWC3_EVENT_PENDING)) |
2773 | return IRQ_NONE; | |
b15a762f | 2774 | |
f42f2447 FB |
2775 | while (left > 0) { |
2776 | union dwc3_event event; | |
b15a762f | 2777 | |
f42f2447 | 2778 | event.raw = *(u32 *) (evt->buf + evt->lpos); |
b15a762f | 2779 | |
f42f2447 | 2780 | dwc3_process_event_entry(dwc, &event); |
b15a762f | 2781 | |
f42f2447 FB |
2782 | /* |
2783 | * FIXME we wrap around correctly to the next entry as | |
2784 | * almost all entries are 4 bytes in size. There is one | |
2785 | * entry which has 12 bytes which is a regular entry | |
2786 | * followed by 8 bytes data. ATM I don't know how | |
2787 | * things are organized if we get next to the a | |
2788 | * boundary so I worry about that once we try to handle | |
2789 | * that. | |
2790 | */ | |
2791 | evt->lpos = (evt->lpos + 4) % DWC3_EVENT_BUFFERS_SIZE; | |
2792 | left -= 4; | |
b15a762f | 2793 | |
660e9bde | 2794 | dwc3_writel(dwc->regs, DWC3_GEVNTCOUNT(0), 4); |
f42f2447 | 2795 | } |
b15a762f | 2796 | |
f42f2447 FB |
2797 | evt->count = 0; |
2798 | evt->flags &= ~DWC3_EVENT_PENDING; | |
2799 | ret = IRQ_HANDLED; | |
b15a762f | 2800 | |
f42f2447 | 2801 | /* Unmask interrupt */ |
660e9bde | 2802 | reg = dwc3_readl(dwc->regs, DWC3_GEVNTSIZ(0)); |
f42f2447 | 2803 | reg &= ~DWC3_GEVNTSIZ_INTMASK; |
660e9bde | 2804 | dwc3_writel(dwc->regs, DWC3_GEVNTSIZ(0), reg); |
b15a762f | 2805 | |
f42f2447 FB |
2806 | return ret; |
2807 | } | |
e8adfc30 | 2808 | |
dea520a4 | 2809 | static irqreturn_t dwc3_thread_interrupt(int irq, void *_evt) |
f42f2447 | 2810 | { |
dea520a4 FB |
2811 | struct dwc3_event_buffer *evt = _evt; |
2812 | struct dwc3 *dwc = evt->dwc; | |
e5f68b4a | 2813 | unsigned long flags; |
f42f2447 | 2814 | irqreturn_t ret = IRQ_NONE; |
f42f2447 | 2815 | |
e5f68b4a | 2816 | spin_lock_irqsave(&dwc->lock, flags); |
dea520a4 | 2817 | ret = dwc3_process_event_buf(evt); |
e5f68b4a | 2818 | spin_unlock_irqrestore(&dwc->lock, flags); |
b15a762f FB |
2819 | |
2820 | return ret; | |
2821 | } | |
2822 | ||
dea520a4 | 2823 | static irqreturn_t dwc3_check_event_buf(struct dwc3_event_buffer *evt) |
72246da4 | 2824 | { |
dea520a4 | 2825 | struct dwc3 *dwc = evt->dwc; |
72246da4 | 2826 | u32 count; |
e8adfc30 | 2827 | u32 reg; |
72246da4 | 2828 | |
fc8bb91b FB |
2829 | if (pm_runtime_suspended(dwc->dev)) { |
2830 | pm_runtime_get(dwc->dev); | |
2831 | disable_irq_nosync(dwc->irq_gadget); | |
2832 | dwc->pending_events = true; | |
2833 | return IRQ_HANDLED; | |
2834 | } | |
2835 | ||
660e9bde | 2836 | count = dwc3_readl(dwc->regs, DWC3_GEVNTCOUNT(0)); |
72246da4 FB |
2837 | count &= DWC3_GEVNTCOUNT_MASK; |
2838 | if (!count) | |
2839 | return IRQ_NONE; | |
2840 | ||
b15a762f FB |
2841 | evt->count = count; |
2842 | evt->flags |= DWC3_EVENT_PENDING; | |
72246da4 | 2843 | |
e8adfc30 | 2844 | /* Mask interrupt */ |
660e9bde | 2845 | reg = dwc3_readl(dwc->regs, DWC3_GEVNTSIZ(0)); |
e8adfc30 | 2846 | reg |= DWC3_GEVNTSIZ_INTMASK; |
660e9bde | 2847 | dwc3_writel(dwc->regs, DWC3_GEVNTSIZ(0), reg); |
e8adfc30 | 2848 | |
b15a762f | 2849 | return IRQ_WAKE_THREAD; |
72246da4 FB |
2850 | } |
2851 | ||
dea520a4 | 2852 | static irqreturn_t dwc3_interrupt(int irq, void *_evt) |
72246da4 | 2853 | { |
dea520a4 | 2854 | struct dwc3_event_buffer *evt = _evt; |
72246da4 | 2855 | |
dea520a4 | 2856 | return dwc3_check_event_buf(evt); |
72246da4 FB |
2857 | } |
2858 | ||
2859 | /** | |
2860 | * dwc3_gadget_init - Initializes gadget related registers | |
1d046793 | 2861 | * @dwc: pointer to our controller context structure |
72246da4 FB |
2862 | * |
2863 | * Returns 0 on success otherwise negative errno. | |
2864 | */ | |
41ac7b3a | 2865 | int dwc3_gadget_init(struct dwc3 *dwc) |
72246da4 | 2866 | { |
72246da4 | 2867 | int ret; |
72246da4 FB |
2868 | |
2869 | dwc->ctrl_req = dma_alloc_coherent(dwc->dev, sizeof(*dwc->ctrl_req), | |
2870 | &dwc->ctrl_req_addr, GFP_KERNEL); | |
2871 | if (!dwc->ctrl_req) { | |
2872 | dev_err(dwc->dev, "failed to allocate ctrl request\n"); | |
2873 | ret = -ENOMEM; | |
2874 | goto err0; | |
2875 | } | |
2876 | ||
2abd9d5f | 2877 | dwc->ep0_trb = dma_alloc_coherent(dwc->dev, sizeof(*dwc->ep0_trb) * 2, |
72246da4 FB |
2878 | &dwc->ep0_trb_addr, GFP_KERNEL); |
2879 | if (!dwc->ep0_trb) { | |
2880 | dev_err(dwc->dev, "failed to allocate ep0 trb\n"); | |
2881 | ret = -ENOMEM; | |
2882 | goto err1; | |
2883 | } | |
2884 | ||
3ef35faf | 2885 | dwc->setup_buf = kzalloc(DWC3_EP0_BOUNCE_SIZE, GFP_KERNEL); |
72246da4 | 2886 | if (!dwc->setup_buf) { |
72246da4 FB |
2887 | ret = -ENOMEM; |
2888 | goto err2; | |
2889 | } | |
2890 | ||
5812b1c2 | 2891 | dwc->ep0_bounce = dma_alloc_coherent(dwc->dev, |
3ef35faf FB |
2892 | DWC3_EP0_BOUNCE_SIZE, &dwc->ep0_bounce_addr, |
2893 | GFP_KERNEL); | |
5812b1c2 FB |
2894 | if (!dwc->ep0_bounce) { |
2895 | dev_err(dwc->dev, "failed to allocate ep0 bounce buffer\n"); | |
2896 | ret = -ENOMEM; | |
2897 | goto err3; | |
2898 | } | |
2899 | ||
04c03d10 FB |
2900 | dwc->zlp_buf = kzalloc(DWC3_ZLP_BUF_SIZE, GFP_KERNEL); |
2901 | if (!dwc->zlp_buf) { | |
2902 | ret = -ENOMEM; | |
2903 | goto err4; | |
2904 | } | |
2905 | ||
72246da4 | 2906 | dwc->gadget.ops = &dwc3_gadget_ops; |
72246da4 | 2907 | dwc->gadget.speed = USB_SPEED_UNKNOWN; |
eeb720fb | 2908 | dwc->gadget.sg_supported = true; |
72246da4 | 2909 | dwc->gadget.name = "dwc3-gadget"; |
6a4290cc | 2910 | dwc->gadget.is_otg = dwc->dr_mode == USB_DR_MODE_OTG; |
72246da4 | 2911 | |
b9e51b2b BM |
2912 | /* |
2913 | * FIXME We might be setting max_speed to <SUPER, however versions | |
2914 | * <2.20a of dwc3 have an issue with metastability (documented | |
2915 | * elsewhere in this driver) which tells us we can't set max speed to | |
2916 | * anything lower than SUPER. | |
2917 | * | |
2918 | * Because gadget.max_speed is only used by composite.c and function | |
2919 | * drivers (i.e. it won't go into dwc3's registers) we are allowing this | |
2920 | * to happen so we avoid sending SuperSpeed Capability descriptor | |
2921 | * together with our BOS descriptor as that could confuse host into | |
2922 | * thinking we can handle super speed. | |
2923 | * | |
2924 | * Note that, in fact, we won't even support GetBOS requests when speed | |
2925 | * is less than super speed because we don't have means, yet, to tell | |
2926 | * composite.c that we are USB 2.0 + LPM ECN. | |
2927 | */ | |
2928 | if (dwc->revision < DWC3_REVISION_220A) | |
2929 | dwc3_trace(trace_dwc3_gadget, | |
60cfb37a | 2930 | "Changing max_speed on rev %08x", |
b9e51b2b BM |
2931 | dwc->revision); |
2932 | ||
2933 | dwc->gadget.max_speed = dwc->maximum_speed; | |
2934 | ||
a4b9d94b DC |
2935 | /* |
2936 | * Per databook, DWC3 needs buffer size to be aligned to MaxPacketSize | |
2937 | * on ep out. | |
2938 | */ | |
2939 | dwc->gadget.quirk_ep_out_aligned_size = true; | |
2940 | ||
72246da4 FB |
2941 | /* |
2942 | * REVISIT: Here we should clear all pending IRQs to be | |
2943 | * sure we're starting from a well known location. | |
2944 | */ | |
2945 | ||
2946 | ret = dwc3_gadget_init_endpoints(dwc); | |
2947 | if (ret) | |
04c03d10 | 2948 | goto err5; |
72246da4 | 2949 | |
72246da4 FB |
2950 | ret = usb_add_gadget_udc(dwc->dev, &dwc->gadget); |
2951 | if (ret) { | |
2952 | dev_err(dwc->dev, "failed to register udc\n"); | |
04c03d10 | 2953 | goto err5; |
72246da4 FB |
2954 | } |
2955 | ||
2956 | return 0; | |
2957 | ||
04c03d10 FB |
2958 | err5: |
2959 | kfree(dwc->zlp_buf); | |
2960 | ||
5812b1c2 | 2961 | err4: |
e1f80467 | 2962 | dwc3_gadget_free_endpoints(dwc); |
3ef35faf FB |
2963 | dma_free_coherent(dwc->dev, DWC3_EP0_BOUNCE_SIZE, |
2964 | dwc->ep0_bounce, dwc->ep0_bounce_addr); | |
5812b1c2 | 2965 | |
72246da4 | 2966 | err3: |
0fc9a1be | 2967 | kfree(dwc->setup_buf); |
72246da4 FB |
2968 | |
2969 | err2: | |
2970 | dma_free_coherent(dwc->dev, sizeof(*dwc->ep0_trb), | |
2971 | dwc->ep0_trb, dwc->ep0_trb_addr); | |
2972 | ||
2973 | err1: | |
2974 | dma_free_coherent(dwc->dev, sizeof(*dwc->ctrl_req), | |
2975 | dwc->ctrl_req, dwc->ctrl_req_addr); | |
2976 | ||
2977 | err0: | |
2978 | return ret; | |
2979 | } | |
2980 | ||
7415f17c FB |
2981 | /* -------------------------------------------------------------------------- */ |
2982 | ||
72246da4 FB |
2983 | void dwc3_gadget_exit(struct dwc3 *dwc) |
2984 | { | |
72246da4 | 2985 | usb_del_gadget_udc(&dwc->gadget); |
72246da4 | 2986 | |
72246da4 FB |
2987 | dwc3_gadget_free_endpoints(dwc); |
2988 | ||
3ef35faf FB |
2989 | dma_free_coherent(dwc->dev, DWC3_EP0_BOUNCE_SIZE, |
2990 | dwc->ep0_bounce, dwc->ep0_bounce_addr); | |
5812b1c2 | 2991 | |
0fc9a1be | 2992 | kfree(dwc->setup_buf); |
04c03d10 | 2993 | kfree(dwc->zlp_buf); |
72246da4 FB |
2994 | |
2995 | dma_free_coherent(dwc->dev, sizeof(*dwc->ep0_trb), | |
2996 | dwc->ep0_trb, dwc->ep0_trb_addr); | |
2997 | ||
2998 | dma_free_coherent(dwc->dev, sizeof(*dwc->ctrl_req), | |
2999 | dwc->ctrl_req, dwc->ctrl_req_addr); | |
72246da4 | 3000 | } |
7415f17c | 3001 | |
0b0231aa | 3002 | int dwc3_gadget_suspend(struct dwc3 *dwc) |
7415f17c | 3003 | { |
9f8a67b6 FB |
3004 | int ret; |
3005 | ||
9772b47a RQ |
3006 | if (!dwc->gadget_driver) |
3007 | return 0; | |
3008 | ||
9f8a67b6 FB |
3009 | ret = dwc3_gadget_run_stop(dwc, false, false); |
3010 | if (ret < 0) | |
3011 | return ret; | |
7415f17c | 3012 | |
9f8a67b6 FB |
3013 | dwc3_disconnect_gadget(dwc); |
3014 | __dwc3_gadget_stop(dwc); | |
7415f17c FB |
3015 | |
3016 | return 0; | |
3017 | } | |
3018 | ||
3019 | int dwc3_gadget_resume(struct dwc3 *dwc) | |
3020 | { | |
7415f17c FB |
3021 | int ret; |
3022 | ||
9772b47a RQ |
3023 | if (!dwc->gadget_driver) |
3024 | return 0; | |
3025 | ||
9f8a67b6 FB |
3026 | ret = __dwc3_gadget_start(dwc); |
3027 | if (ret < 0) | |
7415f17c FB |
3028 | goto err0; |
3029 | ||
9f8a67b6 FB |
3030 | ret = dwc3_gadget_run_stop(dwc, true, false); |
3031 | if (ret < 0) | |
7415f17c FB |
3032 | goto err1; |
3033 | ||
7415f17c FB |
3034 | return 0; |
3035 | ||
3036 | err1: | |
9f8a67b6 | 3037 | __dwc3_gadget_stop(dwc); |
7415f17c FB |
3038 | |
3039 | err0: | |
3040 | return ret; | |
3041 | } | |
fc8bb91b FB |
3042 | |
3043 | void dwc3_gadget_process_pending_events(struct dwc3 *dwc) | |
3044 | { | |
3045 | if (dwc->pending_events) { | |
3046 | dwc3_interrupt(dwc->irq_gadget, dwc->ev_buf); | |
3047 | dwc->pending_events = false; | |
3048 | enable_irq(dwc->irq_gadget); | |
3049 | } | |
3050 | } |