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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 | ||
457e84b6 FB |
148 | /** |
149 | * dwc3_gadget_resize_tx_fifos - reallocate fifo spaces for current use-case | |
150 | * @dwc: pointer to our context structure | |
151 | * | |
152 | * This function will a best effort FIFO allocation in order | |
153 | * to improve FIFO usage and throughput, while still allowing | |
154 | * us to enable as many endpoints as possible. | |
155 | * | |
156 | * Keep in mind that this operation will be highly dependent | |
157 | * on the configured size for RAM1 - which contains TxFifo -, | |
158 | * the amount of endpoints enabled on coreConsultant tool, and | |
159 | * the width of the Master Bus. | |
160 | * | |
161 | * In the ideal world, we would always be able to satisfy the | |
162 | * following equation: | |
163 | * | |
164 | * ((512 + 2 * MDWIDTH-Bytes) + (Number of IN Endpoints - 1) * \ | |
165 | * (3 * (1024 + MDWIDTH-Bytes) + MDWIDTH-Bytes)) / MDWIDTH-Bytes | |
166 | * | |
167 | * Unfortunately, due to many variables that's not always the case. | |
168 | */ | |
169 | int dwc3_gadget_resize_tx_fifos(struct dwc3 *dwc) | |
170 | { | |
171 | int last_fifo_depth = 0; | |
172 | int ram1_depth; | |
173 | int fifo_size; | |
174 | int mdwidth; | |
175 | int num; | |
176 | ||
177 | if (!dwc->needs_fifo_resize) | |
178 | return 0; | |
179 | ||
180 | ram1_depth = DWC3_RAM1_DEPTH(dwc->hwparams.hwparams7); | |
181 | mdwidth = DWC3_MDWIDTH(dwc->hwparams.hwparams0); | |
182 | ||
183 | /* MDWIDTH is represented in bits, we need it in bytes */ | |
184 | mdwidth >>= 3; | |
185 | ||
186 | /* | |
187 | * FIXME For now we will only allocate 1 wMaxPacketSize space | |
188 | * for each enabled endpoint, later patches will come to | |
189 | * improve this algorithm so that we better use the internal | |
190 | * FIFO space | |
191 | */ | |
32702e96 JP |
192 | for (num = 0; num < dwc->num_in_eps; num++) { |
193 | /* bit0 indicates direction; 1 means IN ep */ | |
194 | struct dwc3_ep *dep = dwc->eps[(num << 1) | 1]; | |
2e81c36a | 195 | int mult = 1; |
457e84b6 FB |
196 | int tmp; |
197 | ||
457e84b6 FB |
198 | if (!(dep->flags & DWC3_EP_ENABLED)) |
199 | continue; | |
200 | ||
16e78db7 IS |
201 | if (usb_endpoint_xfer_bulk(dep->endpoint.desc) |
202 | || usb_endpoint_xfer_isoc(dep->endpoint.desc)) | |
2e81c36a FB |
203 | mult = 3; |
204 | ||
205 | /* | |
206 | * REVISIT: the following assumes we will always have enough | |
207 | * space available on the FIFO RAM for all possible use cases. | |
208 | * Make sure that's true somehow and change FIFO allocation | |
209 | * accordingly. | |
210 | * | |
211 | * If we have Bulk or Isochronous endpoints, we want | |
212 | * them to be able to be very, very fast. So we're giving | |
213 | * those endpoints a fifo_size which is enough for 3 full | |
214 | * packets | |
215 | */ | |
216 | tmp = mult * (dep->endpoint.maxpacket + mdwidth); | |
457e84b6 FB |
217 | tmp += mdwidth; |
218 | ||
219 | fifo_size = DIV_ROUND_UP(tmp, mdwidth); | |
2e81c36a | 220 | |
457e84b6 FB |
221 | fifo_size |= (last_fifo_depth << 16); |
222 | ||
73815280 | 223 | dwc3_trace(trace_dwc3_gadget, "%s: Fifo Addr %04x Size %d", |
457e84b6 FB |
224 | dep->name, last_fifo_depth, fifo_size & 0xffff); |
225 | ||
32702e96 | 226 | dwc3_writel(dwc->regs, DWC3_GTXFIFOSIZ(num), fifo_size); |
457e84b6 FB |
227 | |
228 | last_fifo_depth += (fifo_size & 0xffff); | |
229 | } | |
230 | ||
231 | return 0; | |
232 | } | |
233 | ||
72246da4 FB |
234 | void dwc3_gadget_giveback(struct dwc3_ep *dep, struct dwc3_request *req, |
235 | int status) | |
236 | { | |
237 | struct dwc3 *dwc = dep->dwc; | |
e5ba5ec8 | 238 | int i; |
72246da4 FB |
239 | |
240 | if (req->queued) { | |
e5ba5ec8 PA |
241 | i = 0; |
242 | do { | |
eeb720fb | 243 | dep->busy_slot++; |
e5ba5ec8 PA |
244 | /* |
245 | * Skip LINK TRB. We can't use req->trb and check for | |
246 | * DWC3_TRBCTL_LINK_TRB because it points the TRB we | |
247 | * just completed (not the LINK TRB). | |
248 | */ | |
249 | if (((dep->busy_slot & DWC3_TRB_MASK) == | |
250 | DWC3_TRB_NUM- 1) && | |
16e78db7 | 251 | usb_endpoint_xfer_isoc(dep->endpoint.desc)) |
e5ba5ec8 PA |
252 | dep->busy_slot++; |
253 | } while(++i < req->request.num_mapped_sgs); | |
c9fda7d6 | 254 | req->queued = false; |
72246da4 FB |
255 | } |
256 | list_del(&req->list); | |
eeb720fb | 257 | req->trb = NULL; |
72246da4 FB |
258 | |
259 | if (req->request.status == -EINPROGRESS) | |
260 | req->request.status = status; | |
261 | ||
0416e494 PA |
262 | if (dwc->ep0_bounced && dep->number == 0) |
263 | dwc->ep0_bounced = false; | |
264 | else | |
265 | usb_gadget_unmap_request(&dwc->gadget, &req->request, | |
266 | req->direction); | |
72246da4 | 267 | |
2c4cbe6e | 268 | trace_dwc3_gadget_giveback(req); |
72246da4 FB |
269 | |
270 | spin_unlock(&dwc->lock); | |
304f7e5e | 271 | usb_gadget_giveback_request(&dep->endpoint, &req->request); |
72246da4 FB |
272 | spin_lock(&dwc->lock); |
273 | } | |
274 | ||
3ece0ec4 | 275 | int dwc3_send_gadget_generic_command(struct dwc3 *dwc, unsigned cmd, u32 param) |
b09bb642 FB |
276 | { |
277 | u32 timeout = 500; | |
278 | u32 reg; | |
279 | ||
2c4cbe6e | 280 | trace_dwc3_gadget_generic_cmd(cmd, param); |
427c3df6 | 281 | |
b09bb642 FB |
282 | dwc3_writel(dwc->regs, DWC3_DGCMDPAR, param); |
283 | dwc3_writel(dwc->regs, DWC3_DGCMD, cmd | DWC3_DGCMD_CMDACT); | |
284 | ||
285 | do { | |
286 | reg = dwc3_readl(dwc->regs, DWC3_DGCMD); | |
287 | if (!(reg & DWC3_DGCMD_CMDACT)) { | |
73815280 FB |
288 | dwc3_trace(trace_dwc3_gadget, |
289 | "Command Complete --> %d", | |
b09bb642 | 290 | DWC3_DGCMD_STATUS(reg)); |
891b1dc0 SSB |
291 | if (DWC3_DGCMD_STATUS(reg)) |
292 | return -EINVAL; | |
b09bb642 FB |
293 | return 0; |
294 | } | |
295 | ||
296 | /* | |
297 | * We can't sleep here, because it's also called from | |
298 | * interrupt context. | |
299 | */ | |
300 | timeout--; | |
73815280 FB |
301 | if (!timeout) { |
302 | dwc3_trace(trace_dwc3_gadget, | |
303 | "Command Timed Out"); | |
b09bb642 | 304 | return -ETIMEDOUT; |
73815280 | 305 | } |
b09bb642 FB |
306 | udelay(1); |
307 | } while (1); | |
308 | } | |
309 | ||
72246da4 FB |
310 | int dwc3_send_gadget_ep_cmd(struct dwc3 *dwc, unsigned ep, |
311 | unsigned cmd, struct dwc3_gadget_ep_cmd_params *params) | |
312 | { | |
313 | struct dwc3_ep *dep = dwc->eps[ep]; | |
61d58242 | 314 | u32 timeout = 500; |
72246da4 FB |
315 | u32 reg; |
316 | ||
2c4cbe6e | 317 | trace_dwc3_gadget_ep_cmd(dep, cmd, params); |
72246da4 | 318 | |
dc1c70a7 FB |
319 | dwc3_writel(dwc->regs, DWC3_DEPCMDPAR0(ep), params->param0); |
320 | dwc3_writel(dwc->regs, DWC3_DEPCMDPAR1(ep), params->param1); | |
321 | dwc3_writel(dwc->regs, DWC3_DEPCMDPAR2(ep), params->param2); | |
72246da4 FB |
322 | |
323 | dwc3_writel(dwc->regs, DWC3_DEPCMD(ep), cmd | DWC3_DEPCMD_CMDACT); | |
324 | do { | |
325 | reg = dwc3_readl(dwc->regs, DWC3_DEPCMD(ep)); | |
326 | if (!(reg & DWC3_DEPCMD_CMDACT)) { | |
73815280 FB |
327 | dwc3_trace(trace_dwc3_gadget, |
328 | "Command Complete --> %d", | |
164f6e14 | 329 | DWC3_DEPCMD_STATUS(reg)); |
76e838c9 SSB |
330 | if (DWC3_DEPCMD_STATUS(reg)) |
331 | return -EINVAL; | |
72246da4 FB |
332 | return 0; |
333 | } | |
334 | ||
335 | /* | |
72246da4 FB |
336 | * We can't sleep here, because it is also called from |
337 | * interrupt context. | |
338 | */ | |
339 | timeout--; | |
73815280 FB |
340 | if (!timeout) { |
341 | dwc3_trace(trace_dwc3_gadget, | |
342 | "Command Timed Out"); | |
72246da4 | 343 | return -ETIMEDOUT; |
73815280 | 344 | } |
72246da4 | 345 | |
61d58242 | 346 | udelay(1); |
72246da4 FB |
347 | } while (1); |
348 | } | |
349 | ||
350 | static dma_addr_t dwc3_trb_dma_offset(struct dwc3_ep *dep, | |
f6bafc6a | 351 | struct dwc3_trb *trb) |
72246da4 | 352 | { |
c439ef87 | 353 | u32 offset = (char *) trb - (char *) dep->trb_pool; |
72246da4 FB |
354 | |
355 | return dep->trb_pool_dma + offset; | |
356 | } | |
357 | ||
358 | static int dwc3_alloc_trb_pool(struct dwc3_ep *dep) | |
359 | { | |
360 | struct dwc3 *dwc = dep->dwc; | |
361 | ||
362 | if (dep->trb_pool) | |
363 | return 0; | |
364 | ||
72246da4 FB |
365 | dep->trb_pool = dma_alloc_coherent(dwc->dev, |
366 | sizeof(struct dwc3_trb) * DWC3_TRB_NUM, | |
367 | &dep->trb_pool_dma, GFP_KERNEL); | |
368 | if (!dep->trb_pool) { | |
369 | dev_err(dep->dwc->dev, "failed to allocate trb pool for %s\n", | |
370 | dep->name); | |
371 | return -ENOMEM; | |
372 | } | |
373 | ||
374 | return 0; | |
375 | } | |
376 | ||
377 | static void dwc3_free_trb_pool(struct dwc3_ep *dep) | |
378 | { | |
379 | struct dwc3 *dwc = dep->dwc; | |
380 | ||
381 | dma_free_coherent(dwc->dev, sizeof(struct dwc3_trb) * DWC3_TRB_NUM, | |
382 | dep->trb_pool, dep->trb_pool_dma); | |
383 | ||
384 | dep->trb_pool = NULL; | |
385 | dep->trb_pool_dma = 0; | |
386 | } | |
387 | ||
c4509601 JY |
388 | static int dwc3_gadget_set_xfer_resource(struct dwc3 *dwc, struct dwc3_ep *dep); |
389 | ||
390 | /** | |
391 | * dwc3_gadget_start_config - Configure EP resources | |
392 | * @dwc: pointer to our controller context structure | |
393 | * @dep: endpoint that is being enabled | |
394 | * | |
395 | * The assignment of transfer resources cannot perfectly follow the | |
396 | * data book due to the fact that the controller driver does not have | |
397 | * all knowledge of the configuration in advance. It is given this | |
398 | * information piecemeal by the composite gadget framework after every | |
399 | * SET_CONFIGURATION and SET_INTERFACE. Trying to follow the databook | |
400 | * programming model in this scenario can cause errors. For two | |
401 | * reasons: | |
402 | * | |
403 | * 1) The databook says to do DEPSTARTCFG for every SET_CONFIGURATION | |
404 | * and SET_INTERFACE (8.1.5). This is incorrect in the scenario of | |
405 | * multiple interfaces. | |
406 | * | |
407 | * 2) The databook does not mention doing more DEPXFERCFG for new | |
408 | * endpoint on alt setting (8.1.6). | |
409 | * | |
410 | * The following simplified method is used instead: | |
411 | * | |
412 | * All hardware endpoints can be assigned a transfer resource and this | |
413 | * setting will stay persistent until either a core reset or | |
414 | * hibernation. So whenever we do a DEPSTARTCFG(0) we can go ahead and | |
415 | * do DEPXFERCFG for every hardware endpoint as well. We are | |
416 | * guaranteed that there are as many transfer resources as endpoints. | |
417 | * | |
418 | * This function is called for each endpoint when it is being enabled | |
419 | * but is triggered only when called for EP0-out, which always happens | |
420 | * first, and which should only happen in one of the above conditions. | |
421 | */ | |
72246da4 FB |
422 | static int dwc3_gadget_start_config(struct dwc3 *dwc, struct dwc3_ep *dep) |
423 | { | |
424 | struct dwc3_gadget_ep_cmd_params params; | |
425 | u32 cmd; | |
c4509601 JY |
426 | int i; |
427 | int ret; | |
428 | ||
429 | if (dep->number) | |
430 | return 0; | |
72246da4 FB |
431 | |
432 | memset(¶ms, 0x00, sizeof(params)); | |
c4509601 | 433 | cmd = DWC3_DEPCMD_DEPSTARTCFG; |
72246da4 | 434 | |
c4509601 JY |
435 | ret = dwc3_send_gadget_ep_cmd(dwc, 0, cmd, ¶ms); |
436 | if (ret) | |
437 | return ret; | |
438 | ||
439 | for (i = 0; i < DWC3_ENDPOINTS_NUM; i++) { | |
440 | struct dwc3_ep *dep = dwc->eps[i]; | |
72246da4 | 441 | |
c4509601 JY |
442 | if (!dep) |
443 | continue; | |
444 | ||
445 | ret = dwc3_gadget_set_xfer_resource(dwc, dep); | |
446 | if (ret) | |
447 | return ret; | |
72246da4 FB |
448 | } |
449 | ||
450 | return 0; | |
451 | } | |
452 | ||
453 | static int dwc3_gadget_set_ep_config(struct dwc3 *dwc, struct dwc3_ep *dep, | |
c90bfaec | 454 | const struct usb_endpoint_descriptor *desc, |
4b345c9a | 455 | const struct usb_ss_ep_comp_descriptor *comp_desc, |
265b70a7 | 456 | bool ignore, bool restore) |
72246da4 FB |
457 | { |
458 | struct dwc3_gadget_ep_cmd_params params; | |
459 | ||
460 | memset(¶ms, 0x00, sizeof(params)); | |
461 | ||
dc1c70a7 | 462 | params.param0 = DWC3_DEPCFG_EP_TYPE(usb_endpoint_type(desc)) |
d2e9a13a CP |
463 | | DWC3_DEPCFG_MAX_PACKET_SIZE(usb_endpoint_maxp(desc)); |
464 | ||
465 | /* Burst size is only needed in SuperSpeed mode */ | |
466 | if (dwc->gadget.speed == USB_SPEED_SUPER) { | |
467 | u32 burst = dep->endpoint.maxburst - 1; | |
468 | ||
469 | params.param0 |= DWC3_DEPCFG_BURST_SIZE(burst); | |
470 | } | |
72246da4 | 471 | |
4b345c9a FB |
472 | if (ignore) |
473 | params.param0 |= DWC3_DEPCFG_IGN_SEQ_NUM; | |
474 | ||
265b70a7 PZ |
475 | if (restore) { |
476 | params.param0 |= DWC3_DEPCFG_ACTION_RESTORE; | |
477 | params.param2 |= dep->saved_state; | |
478 | } | |
479 | ||
dc1c70a7 FB |
480 | params.param1 = DWC3_DEPCFG_XFER_COMPLETE_EN |
481 | | DWC3_DEPCFG_XFER_NOT_READY_EN; | |
72246da4 | 482 | |
18b7ede5 | 483 | if (usb_ss_max_streams(comp_desc) && usb_endpoint_xfer_bulk(desc)) { |
dc1c70a7 FB |
484 | params.param1 |= DWC3_DEPCFG_STREAM_CAPABLE |
485 | | DWC3_DEPCFG_STREAM_EVENT_EN; | |
879631aa FB |
486 | dep->stream_capable = true; |
487 | } | |
488 | ||
0b93a4c8 | 489 | if (!usb_endpoint_xfer_control(desc)) |
dc1c70a7 | 490 | params.param1 |= DWC3_DEPCFG_XFER_IN_PROGRESS_EN; |
72246da4 FB |
491 | |
492 | /* | |
493 | * We are doing 1:1 mapping for endpoints, meaning | |
494 | * Physical Endpoints 2 maps to Logical Endpoint 2 and | |
495 | * so on. We consider the direction bit as part of the physical | |
496 | * endpoint number. So USB endpoint 0x81 is 0x03. | |
497 | */ | |
dc1c70a7 | 498 | params.param1 |= DWC3_DEPCFG_EP_NUMBER(dep->number); |
72246da4 FB |
499 | |
500 | /* | |
501 | * We must use the lower 16 TX FIFOs even though | |
502 | * HW might have more | |
503 | */ | |
504 | if (dep->direction) | |
dc1c70a7 | 505 | params.param0 |= DWC3_DEPCFG_FIFO_NUMBER(dep->number >> 1); |
72246da4 FB |
506 | |
507 | if (desc->bInterval) { | |
dc1c70a7 | 508 | params.param1 |= DWC3_DEPCFG_BINTERVAL_M1(desc->bInterval - 1); |
72246da4 FB |
509 | dep->interval = 1 << (desc->bInterval - 1); |
510 | } | |
511 | ||
512 | return dwc3_send_gadget_ep_cmd(dwc, dep->number, | |
513 | DWC3_DEPCMD_SETEPCONFIG, ¶ms); | |
514 | } | |
515 | ||
516 | static int dwc3_gadget_set_xfer_resource(struct dwc3 *dwc, struct dwc3_ep *dep) | |
517 | { | |
518 | struct dwc3_gadget_ep_cmd_params params; | |
519 | ||
520 | memset(¶ms, 0x00, sizeof(params)); | |
521 | ||
dc1c70a7 | 522 | params.param0 = DWC3_DEPXFERCFG_NUM_XFER_RES(1); |
72246da4 FB |
523 | |
524 | return dwc3_send_gadget_ep_cmd(dwc, dep->number, | |
525 | DWC3_DEPCMD_SETTRANSFRESOURCE, ¶ms); | |
526 | } | |
527 | ||
528 | /** | |
529 | * __dwc3_gadget_ep_enable - Initializes a HW endpoint | |
530 | * @dep: endpoint to be initialized | |
531 | * @desc: USB Endpoint Descriptor | |
532 | * | |
533 | * Caller should take care of locking | |
534 | */ | |
535 | static int __dwc3_gadget_ep_enable(struct dwc3_ep *dep, | |
c90bfaec | 536 | const struct usb_endpoint_descriptor *desc, |
4b345c9a | 537 | const struct usb_ss_ep_comp_descriptor *comp_desc, |
265b70a7 | 538 | bool ignore, bool restore) |
72246da4 FB |
539 | { |
540 | struct dwc3 *dwc = dep->dwc; | |
541 | u32 reg; | |
b09e99ee | 542 | int ret; |
72246da4 | 543 | |
73815280 | 544 | dwc3_trace(trace_dwc3_gadget, "Enabling %s", dep->name); |
ff62d6b6 | 545 | |
72246da4 FB |
546 | if (!(dep->flags & DWC3_EP_ENABLED)) { |
547 | ret = dwc3_gadget_start_config(dwc, dep); | |
548 | if (ret) | |
549 | return ret; | |
550 | } | |
551 | ||
265b70a7 PZ |
552 | ret = dwc3_gadget_set_ep_config(dwc, dep, desc, comp_desc, ignore, |
553 | restore); | |
72246da4 FB |
554 | if (ret) |
555 | return ret; | |
556 | ||
557 | if (!(dep->flags & DWC3_EP_ENABLED)) { | |
f6bafc6a FB |
558 | struct dwc3_trb *trb_st_hw; |
559 | struct dwc3_trb *trb_link; | |
72246da4 | 560 | |
16e78db7 | 561 | dep->endpoint.desc = desc; |
c90bfaec | 562 | dep->comp_desc = comp_desc; |
72246da4 FB |
563 | dep->type = usb_endpoint_type(desc); |
564 | dep->flags |= DWC3_EP_ENABLED; | |
565 | ||
566 | reg = dwc3_readl(dwc->regs, DWC3_DALEPENA); | |
567 | reg |= DWC3_DALEPENA_EP(dep->number); | |
568 | dwc3_writel(dwc->regs, DWC3_DALEPENA, reg); | |
569 | ||
570 | if (!usb_endpoint_xfer_isoc(desc)) | |
571 | return 0; | |
572 | ||
1d046793 | 573 | /* Link TRB for ISOC. The HWO bit is never reset */ |
72246da4 FB |
574 | trb_st_hw = &dep->trb_pool[0]; |
575 | ||
f6bafc6a | 576 | trb_link = &dep->trb_pool[DWC3_TRB_NUM - 1]; |
1200a82a | 577 | memset(trb_link, 0, sizeof(*trb_link)); |
72246da4 | 578 | |
f6bafc6a FB |
579 | trb_link->bpl = lower_32_bits(dwc3_trb_dma_offset(dep, trb_st_hw)); |
580 | trb_link->bph = upper_32_bits(dwc3_trb_dma_offset(dep, trb_st_hw)); | |
581 | trb_link->ctrl |= DWC3_TRBCTL_LINK_TRB; | |
582 | trb_link->ctrl |= DWC3_TRB_CTRL_HWO; | |
72246da4 FB |
583 | } |
584 | ||
aa739974 FB |
585 | switch (usb_endpoint_type(desc)) { |
586 | case USB_ENDPOINT_XFER_CONTROL: | |
587 | strlcat(dep->name, "-control", sizeof(dep->name)); | |
588 | break; | |
589 | case USB_ENDPOINT_XFER_ISOC: | |
590 | strlcat(dep->name, "-isoc", sizeof(dep->name)); | |
591 | break; | |
592 | case USB_ENDPOINT_XFER_BULK: | |
593 | strlcat(dep->name, "-bulk", sizeof(dep->name)); | |
594 | break; | |
595 | case USB_ENDPOINT_XFER_INT: | |
596 | strlcat(dep->name, "-int", sizeof(dep->name)); | |
597 | break; | |
598 | default: | |
599 | dev_err(dwc->dev, "invalid endpoint transfer type\n"); | |
600 | } | |
601 | ||
72246da4 FB |
602 | return 0; |
603 | } | |
604 | ||
b992e681 | 605 | static void dwc3_stop_active_transfer(struct dwc3 *dwc, u32 epnum, bool force); |
624407f9 | 606 | static void dwc3_remove_requests(struct dwc3 *dwc, struct dwc3_ep *dep) |
72246da4 FB |
607 | { |
608 | struct dwc3_request *req; | |
609 | ||
ea53b882 | 610 | if (!list_empty(&dep->req_queued)) { |
b992e681 | 611 | dwc3_stop_active_transfer(dwc, dep->number, true); |
624407f9 | 612 | |
57911504 | 613 | /* - giveback all requests to gadget driver */ |
1591633e PA |
614 | while (!list_empty(&dep->req_queued)) { |
615 | req = next_request(&dep->req_queued); | |
616 | ||
617 | dwc3_gadget_giveback(dep, req, -ESHUTDOWN); | |
618 | } | |
ea53b882 FB |
619 | } |
620 | ||
72246da4 FB |
621 | while (!list_empty(&dep->request_list)) { |
622 | req = next_request(&dep->request_list); | |
623 | ||
624407f9 | 624 | dwc3_gadget_giveback(dep, req, -ESHUTDOWN); |
72246da4 | 625 | } |
72246da4 FB |
626 | } |
627 | ||
628 | /** | |
629 | * __dwc3_gadget_ep_disable - Disables a HW endpoint | |
630 | * @dep: the endpoint to disable | |
631 | * | |
624407f9 SAS |
632 | * This function also removes requests which are currently processed ny the |
633 | * hardware and those which are not yet scheduled. | |
634 | * Caller should take care of locking. | |
72246da4 | 635 | */ |
72246da4 FB |
636 | static int __dwc3_gadget_ep_disable(struct dwc3_ep *dep) |
637 | { | |
638 | struct dwc3 *dwc = dep->dwc; | |
639 | u32 reg; | |
640 | ||
7eaeac5c FB |
641 | dwc3_trace(trace_dwc3_gadget, "Disabling %s", dep->name); |
642 | ||
624407f9 | 643 | dwc3_remove_requests(dwc, dep); |
72246da4 | 644 | |
687ef981 FB |
645 | /* make sure HW endpoint isn't stalled */ |
646 | if (dep->flags & DWC3_EP_STALL) | |
7a608559 | 647 | __dwc3_gadget_ep_set_halt(dep, 0, false); |
687ef981 | 648 | |
72246da4 FB |
649 | reg = dwc3_readl(dwc->regs, DWC3_DALEPENA); |
650 | reg &= ~DWC3_DALEPENA_EP(dep->number); | |
651 | dwc3_writel(dwc->regs, DWC3_DALEPENA, reg); | |
652 | ||
879631aa | 653 | dep->stream_capable = false; |
f9c56cdd | 654 | dep->endpoint.desc = NULL; |
c90bfaec | 655 | dep->comp_desc = NULL; |
72246da4 | 656 | dep->type = 0; |
879631aa | 657 | dep->flags = 0; |
72246da4 | 658 | |
aa739974 FB |
659 | snprintf(dep->name, sizeof(dep->name), "ep%d%s", |
660 | dep->number >> 1, | |
661 | (dep->number & 1) ? "in" : "out"); | |
662 | ||
72246da4 FB |
663 | return 0; |
664 | } | |
665 | ||
666 | /* -------------------------------------------------------------------------- */ | |
667 | ||
668 | static int dwc3_gadget_ep0_enable(struct usb_ep *ep, | |
669 | const struct usb_endpoint_descriptor *desc) | |
670 | { | |
671 | return -EINVAL; | |
672 | } | |
673 | ||
674 | static int dwc3_gadget_ep0_disable(struct usb_ep *ep) | |
675 | { | |
676 | return -EINVAL; | |
677 | } | |
678 | ||
679 | /* -------------------------------------------------------------------------- */ | |
680 | ||
681 | static int dwc3_gadget_ep_enable(struct usb_ep *ep, | |
682 | const struct usb_endpoint_descriptor *desc) | |
683 | { | |
684 | struct dwc3_ep *dep; | |
685 | struct dwc3 *dwc; | |
686 | unsigned long flags; | |
687 | int ret; | |
688 | ||
689 | if (!ep || !desc || desc->bDescriptorType != USB_DT_ENDPOINT) { | |
690 | pr_debug("dwc3: invalid parameters\n"); | |
691 | return -EINVAL; | |
692 | } | |
693 | ||
694 | if (!desc->wMaxPacketSize) { | |
695 | pr_debug("dwc3: missing wMaxPacketSize\n"); | |
696 | return -EINVAL; | |
697 | } | |
698 | ||
699 | dep = to_dwc3_ep(ep); | |
700 | dwc = dep->dwc; | |
701 | ||
95ca961c FB |
702 | if (dev_WARN_ONCE(dwc->dev, dep->flags & DWC3_EP_ENABLED, |
703 | "%s is already enabled\n", | |
704 | dep->name)) | |
c6f83f38 | 705 | return 0; |
c6f83f38 | 706 | |
72246da4 | 707 | spin_lock_irqsave(&dwc->lock, flags); |
265b70a7 | 708 | ret = __dwc3_gadget_ep_enable(dep, desc, ep->comp_desc, false, false); |
72246da4 FB |
709 | spin_unlock_irqrestore(&dwc->lock, flags); |
710 | ||
711 | return ret; | |
712 | } | |
713 | ||
714 | static int dwc3_gadget_ep_disable(struct usb_ep *ep) | |
715 | { | |
716 | struct dwc3_ep *dep; | |
717 | struct dwc3 *dwc; | |
718 | unsigned long flags; | |
719 | int ret; | |
720 | ||
721 | if (!ep) { | |
722 | pr_debug("dwc3: invalid parameters\n"); | |
723 | return -EINVAL; | |
724 | } | |
725 | ||
726 | dep = to_dwc3_ep(ep); | |
727 | dwc = dep->dwc; | |
728 | ||
95ca961c FB |
729 | if (dev_WARN_ONCE(dwc->dev, !(dep->flags & DWC3_EP_ENABLED), |
730 | "%s is already disabled\n", | |
731 | dep->name)) | |
72246da4 | 732 | return 0; |
72246da4 | 733 | |
72246da4 FB |
734 | spin_lock_irqsave(&dwc->lock, flags); |
735 | ret = __dwc3_gadget_ep_disable(dep); | |
736 | spin_unlock_irqrestore(&dwc->lock, flags); | |
737 | ||
738 | return ret; | |
739 | } | |
740 | ||
741 | static struct usb_request *dwc3_gadget_ep_alloc_request(struct usb_ep *ep, | |
742 | gfp_t gfp_flags) | |
743 | { | |
744 | struct dwc3_request *req; | |
745 | struct dwc3_ep *dep = to_dwc3_ep(ep); | |
72246da4 FB |
746 | |
747 | req = kzalloc(sizeof(*req), gfp_flags); | |
734d5a53 | 748 | if (!req) |
72246da4 | 749 | return NULL; |
72246da4 FB |
750 | |
751 | req->epnum = dep->number; | |
752 | req->dep = dep; | |
72246da4 | 753 | |
2c4cbe6e FB |
754 | trace_dwc3_alloc_request(req); |
755 | ||
72246da4 FB |
756 | return &req->request; |
757 | } | |
758 | ||
759 | static void dwc3_gadget_ep_free_request(struct usb_ep *ep, | |
760 | struct usb_request *request) | |
761 | { | |
762 | struct dwc3_request *req = to_dwc3_request(request); | |
763 | ||
2c4cbe6e | 764 | trace_dwc3_free_request(req); |
72246da4 FB |
765 | kfree(req); |
766 | } | |
767 | ||
c71fc37c FB |
768 | /** |
769 | * dwc3_prepare_one_trb - setup one TRB from one request | |
770 | * @dep: endpoint for which this request is prepared | |
771 | * @req: dwc3_request pointer | |
772 | */ | |
68e823e2 | 773 | static void dwc3_prepare_one_trb(struct dwc3_ep *dep, |
eeb720fb | 774 | struct dwc3_request *req, dma_addr_t dma, |
e5ba5ec8 | 775 | unsigned length, unsigned last, unsigned chain, unsigned node) |
c71fc37c | 776 | { |
f6bafc6a | 777 | struct dwc3_trb *trb; |
c71fc37c | 778 | |
73815280 | 779 | dwc3_trace(trace_dwc3_gadget, "%s: req %p dma %08llx length %d%s%s", |
eeb720fb FB |
780 | dep->name, req, (unsigned long long) dma, |
781 | length, last ? " last" : "", | |
782 | chain ? " chain" : ""); | |
783 | ||
915e202a PA |
784 | |
785 | trb = &dep->trb_pool[dep->free_slot & DWC3_TRB_MASK]; | |
c71fc37c | 786 | |
eeb720fb FB |
787 | if (!req->trb) { |
788 | dwc3_gadget_move_request_queued(req); | |
f6bafc6a FB |
789 | req->trb = trb; |
790 | req->trb_dma = dwc3_trb_dma_offset(dep, trb); | |
e5ba5ec8 | 791 | req->start_slot = dep->free_slot & DWC3_TRB_MASK; |
eeb720fb | 792 | } |
c71fc37c | 793 | |
e5ba5ec8 | 794 | dep->free_slot++; |
5cd8c48d ZJC |
795 | /* Skip the LINK-TRB on ISOC */ |
796 | if (((dep->free_slot & DWC3_TRB_MASK) == DWC3_TRB_NUM - 1) && | |
797 | usb_endpoint_xfer_isoc(dep->endpoint.desc)) | |
798 | dep->free_slot++; | |
e5ba5ec8 | 799 | |
f6bafc6a FB |
800 | trb->size = DWC3_TRB_SIZE_LENGTH(length); |
801 | trb->bpl = lower_32_bits(dma); | |
802 | trb->bph = upper_32_bits(dma); | |
c71fc37c | 803 | |
16e78db7 | 804 | switch (usb_endpoint_type(dep->endpoint.desc)) { |
c71fc37c | 805 | case USB_ENDPOINT_XFER_CONTROL: |
f6bafc6a | 806 | trb->ctrl = DWC3_TRBCTL_CONTROL_SETUP; |
c71fc37c FB |
807 | break; |
808 | ||
809 | case USB_ENDPOINT_XFER_ISOC: | |
e5ba5ec8 PA |
810 | if (!node) |
811 | trb->ctrl = DWC3_TRBCTL_ISOCHRONOUS_FIRST; | |
812 | else | |
813 | trb->ctrl = DWC3_TRBCTL_ISOCHRONOUS; | |
c71fc37c FB |
814 | break; |
815 | ||
816 | case USB_ENDPOINT_XFER_BULK: | |
817 | case USB_ENDPOINT_XFER_INT: | |
f6bafc6a | 818 | trb->ctrl = DWC3_TRBCTL_NORMAL; |
c71fc37c FB |
819 | break; |
820 | default: | |
821 | /* | |
822 | * This is only possible with faulty memory because we | |
823 | * checked it already :) | |
824 | */ | |
825 | BUG(); | |
826 | } | |
827 | ||
f3af3651 FB |
828 | if (!req->request.no_interrupt && !chain) |
829 | trb->ctrl |= DWC3_TRB_CTRL_IOC; | |
830 | ||
16e78db7 | 831 | if (usb_endpoint_xfer_isoc(dep->endpoint.desc)) { |
f6bafc6a FB |
832 | trb->ctrl |= DWC3_TRB_CTRL_ISP_IMI; |
833 | trb->ctrl |= DWC3_TRB_CTRL_CSP; | |
e5ba5ec8 PA |
834 | } else if (last) { |
835 | trb->ctrl |= DWC3_TRB_CTRL_LST; | |
f6bafc6a | 836 | } |
c71fc37c | 837 | |
e5ba5ec8 PA |
838 | if (chain) |
839 | trb->ctrl |= DWC3_TRB_CTRL_CHN; | |
840 | ||
16e78db7 | 841 | if (usb_endpoint_xfer_bulk(dep->endpoint.desc) && dep->stream_capable) |
f6bafc6a | 842 | trb->ctrl |= DWC3_TRB_CTRL_SID_SOFN(req->request.stream_id); |
c71fc37c | 843 | |
f6bafc6a | 844 | trb->ctrl |= DWC3_TRB_CTRL_HWO; |
2c4cbe6e FB |
845 | |
846 | trace_dwc3_prepare_trb(dep, trb); | |
c71fc37c FB |
847 | } |
848 | ||
72246da4 FB |
849 | /* |
850 | * dwc3_prepare_trbs - setup TRBs from requests | |
851 | * @dep: endpoint for which requests are being prepared | |
852 | * @starting: true if the endpoint is idle and no requests are queued. | |
853 | * | |
1d046793 PZ |
854 | * The function goes through the requests list and sets up TRBs for the |
855 | * transfers. The function returns once there are no more TRBs available or | |
856 | * it runs out of requests. | |
72246da4 | 857 | */ |
68e823e2 | 858 | static void dwc3_prepare_trbs(struct dwc3_ep *dep, bool starting) |
72246da4 | 859 | { |
68e823e2 | 860 | struct dwc3_request *req, *n; |
72246da4 | 861 | u32 trbs_left; |
8d62cd65 | 862 | u32 max; |
c71fc37c | 863 | unsigned int last_one = 0; |
72246da4 FB |
864 | |
865 | BUILD_BUG_ON_NOT_POWER_OF_2(DWC3_TRB_NUM); | |
866 | ||
867 | /* the first request must not be queued */ | |
868 | trbs_left = (dep->busy_slot - dep->free_slot) & DWC3_TRB_MASK; | |
c71fc37c | 869 | |
8d62cd65 | 870 | /* Can't wrap around on a non-isoc EP since there's no link TRB */ |
16e78db7 | 871 | if (!usb_endpoint_xfer_isoc(dep->endpoint.desc)) { |
8d62cd65 PZ |
872 | max = DWC3_TRB_NUM - (dep->free_slot & DWC3_TRB_MASK); |
873 | if (trbs_left > max) | |
874 | trbs_left = max; | |
875 | } | |
876 | ||
72246da4 | 877 | /* |
1d046793 PZ |
878 | * If busy & slot are equal than it is either full or empty. If we are |
879 | * starting to process requests then we are empty. Otherwise we are | |
72246da4 FB |
880 | * full and don't do anything |
881 | */ | |
882 | if (!trbs_left) { | |
883 | if (!starting) | |
68e823e2 | 884 | return; |
72246da4 FB |
885 | trbs_left = DWC3_TRB_NUM; |
886 | /* | |
887 | * In case we start from scratch, we queue the ISOC requests | |
888 | * starting from slot 1. This is done because we use ring | |
889 | * buffer and have no LST bit to stop us. Instead, we place | |
1d046793 | 890 | * IOC bit every TRB_NUM/4. We try to avoid having an interrupt |
72246da4 FB |
891 | * after the first request so we start at slot 1 and have |
892 | * 7 requests proceed before we hit the first IOC. | |
893 | * Other transfer types don't use the ring buffer and are | |
894 | * processed from the first TRB until the last one. Since we | |
895 | * don't wrap around we have to start at the beginning. | |
896 | */ | |
16e78db7 | 897 | if (usb_endpoint_xfer_isoc(dep->endpoint.desc)) { |
72246da4 FB |
898 | dep->busy_slot = 1; |
899 | dep->free_slot = 1; | |
900 | } else { | |
901 | dep->busy_slot = 0; | |
902 | dep->free_slot = 0; | |
903 | } | |
904 | } | |
905 | ||
906 | /* The last TRB is a link TRB, not used for xfer */ | |
16e78db7 | 907 | if ((trbs_left <= 1) && usb_endpoint_xfer_isoc(dep->endpoint.desc)) |
68e823e2 | 908 | return; |
72246da4 FB |
909 | |
910 | list_for_each_entry_safe(req, n, &dep->request_list, list) { | |
eeb720fb FB |
911 | unsigned length; |
912 | dma_addr_t dma; | |
e5ba5ec8 | 913 | last_one = false; |
72246da4 | 914 | |
eeb720fb FB |
915 | if (req->request.num_mapped_sgs > 0) { |
916 | struct usb_request *request = &req->request; | |
917 | struct scatterlist *sg = request->sg; | |
918 | struct scatterlist *s; | |
919 | int i; | |
72246da4 | 920 | |
eeb720fb FB |
921 | for_each_sg(sg, s, request->num_mapped_sgs, i) { |
922 | unsigned chain = true; | |
72246da4 | 923 | |
eeb720fb FB |
924 | length = sg_dma_len(s); |
925 | dma = sg_dma_address(s); | |
72246da4 | 926 | |
1d046793 PZ |
927 | if (i == (request->num_mapped_sgs - 1) || |
928 | sg_is_last(s)) { | |
ec512fb8 | 929 | if (list_empty(&dep->request_list)) |
e5ba5ec8 | 930 | last_one = true; |
eeb720fb FB |
931 | chain = false; |
932 | } | |
72246da4 | 933 | |
eeb720fb FB |
934 | trbs_left--; |
935 | if (!trbs_left) | |
936 | last_one = true; | |
72246da4 | 937 | |
eeb720fb FB |
938 | if (last_one) |
939 | chain = false; | |
72246da4 | 940 | |
eeb720fb | 941 | dwc3_prepare_one_trb(dep, req, dma, length, |
e5ba5ec8 | 942 | last_one, chain, i); |
72246da4 | 943 | |
eeb720fb FB |
944 | if (last_one) |
945 | break; | |
946 | } | |
39e60635 AV |
947 | |
948 | if (last_one) | |
949 | break; | |
72246da4 | 950 | } else { |
eeb720fb FB |
951 | dma = req->request.dma; |
952 | length = req->request.length; | |
953 | trbs_left--; | |
72246da4 | 954 | |
eeb720fb FB |
955 | if (!trbs_left) |
956 | last_one = 1; | |
879631aa | 957 | |
eeb720fb FB |
958 | /* Is this the last request? */ |
959 | if (list_is_last(&req->list, &dep->request_list)) | |
960 | last_one = 1; | |
72246da4 | 961 | |
eeb720fb | 962 | dwc3_prepare_one_trb(dep, req, dma, length, |
e5ba5ec8 | 963 | last_one, false, 0); |
72246da4 | 964 | |
eeb720fb FB |
965 | if (last_one) |
966 | break; | |
72246da4 | 967 | } |
72246da4 | 968 | } |
72246da4 FB |
969 | } |
970 | ||
971 | static int __dwc3_gadget_kick_transfer(struct dwc3_ep *dep, u16 cmd_param, | |
972 | int start_new) | |
973 | { | |
974 | struct dwc3_gadget_ep_cmd_params params; | |
975 | struct dwc3_request *req; | |
976 | struct dwc3 *dwc = dep->dwc; | |
977 | int ret; | |
978 | u32 cmd; | |
979 | ||
980 | if (start_new && (dep->flags & DWC3_EP_BUSY)) { | |
73815280 | 981 | dwc3_trace(trace_dwc3_gadget, "%s: endpoint busy", dep->name); |
72246da4 FB |
982 | return -EBUSY; |
983 | } | |
72246da4 FB |
984 | |
985 | /* | |
986 | * If we are getting here after a short-out-packet we don't enqueue any | |
987 | * new requests as we try to set the IOC bit only on the last request. | |
988 | */ | |
989 | if (start_new) { | |
990 | if (list_empty(&dep->req_queued)) | |
991 | dwc3_prepare_trbs(dep, start_new); | |
992 | ||
993 | /* req points to the first request which will be sent */ | |
994 | req = next_request(&dep->req_queued); | |
995 | } else { | |
68e823e2 FB |
996 | dwc3_prepare_trbs(dep, start_new); |
997 | ||
72246da4 | 998 | /* |
1d046793 | 999 | * req points to the first request where HWO changed from 0 to 1 |
72246da4 | 1000 | */ |
68e823e2 | 1001 | req = next_request(&dep->req_queued); |
72246da4 FB |
1002 | } |
1003 | if (!req) { | |
1004 | dep->flags |= DWC3_EP_PENDING_REQUEST; | |
1005 | return 0; | |
1006 | } | |
1007 | ||
1008 | memset(¶ms, 0, sizeof(params)); | |
72246da4 | 1009 | |
1877d6c9 PA |
1010 | if (start_new) { |
1011 | params.param0 = upper_32_bits(req->trb_dma); | |
1012 | params.param1 = lower_32_bits(req->trb_dma); | |
72246da4 | 1013 | cmd = DWC3_DEPCMD_STARTTRANSFER; |
1877d6c9 | 1014 | } else { |
72246da4 | 1015 | cmd = DWC3_DEPCMD_UPDATETRANSFER; |
1877d6c9 | 1016 | } |
72246da4 FB |
1017 | |
1018 | cmd |= DWC3_DEPCMD_PARAM(cmd_param); | |
1019 | ret = dwc3_send_gadget_ep_cmd(dwc, dep->number, cmd, ¶ms); | |
1020 | if (ret < 0) { | |
72246da4 FB |
1021 | /* |
1022 | * FIXME we need to iterate over the list of requests | |
1023 | * here and stop, unmap, free and del each of the linked | |
1d046793 | 1024 | * requests instead of what we do now. |
72246da4 | 1025 | */ |
0fc9a1be FB |
1026 | usb_gadget_unmap_request(&dwc->gadget, &req->request, |
1027 | req->direction); | |
72246da4 FB |
1028 | list_del(&req->list); |
1029 | return ret; | |
1030 | } | |
1031 | ||
1032 | dep->flags |= DWC3_EP_BUSY; | |
25b8ff68 | 1033 | |
f898ae09 | 1034 | if (start_new) { |
b4996a86 | 1035 | dep->resource_index = dwc3_gadget_ep_get_transfer_index(dwc, |
f898ae09 | 1036 | dep->number); |
b4996a86 | 1037 | WARN_ON_ONCE(!dep->resource_index); |
f898ae09 | 1038 | } |
25b8ff68 | 1039 | |
72246da4 FB |
1040 | return 0; |
1041 | } | |
1042 | ||
d6d6ec7b PA |
1043 | static void __dwc3_gadget_start_isoc(struct dwc3 *dwc, |
1044 | struct dwc3_ep *dep, u32 cur_uf) | |
1045 | { | |
1046 | u32 uf; | |
1047 | ||
1048 | if (list_empty(&dep->request_list)) { | |
73815280 FB |
1049 | dwc3_trace(trace_dwc3_gadget, |
1050 | "ISOC ep %s run out for requests", | |
1051 | dep->name); | |
f4a53c55 | 1052 | dep->flags |= DWC3_EP_PENDING_REQUEST; |
d6d6ec7b PA |
1053 | return; |
1054 | } | |
1055 | ||
1056 | /* 4 micro frames in the future */ | |
1057 | uf = cur_uf + dep->interval * 4; | |
1058 | ||
1059 | __dwc3_gadget_kick_transfer(dep, uf, 1); | |
1060 | } | |
1061 | ||
1062 | static void dwc3_gadget_start_isoc(struct dwc3 *dwc, | |
1063 | struct dwc3_ep *dep, const struct dwc3_event_depevt *event) | |
1064 | { | |
1065 | u32 cur_uf, mask; | |
1066 | ||
1067 | mask = ~(dep->interval - 1); | |
1068 | cur_uf = event->parameters & mask; | |
1069 | ||
1070 | __dwc3_gadget_start_isoc(dwc, dep, cur_uf); | |
1071 | } | |
1072 | ||
72246da4 FB |
1073 | static int __dwc3_gadget_ep_queue(struct dwc3_ep *dep, struct dwc3_request *req) |
1074 | { | |
0fc9a1be FB |
1075 | struct dwc3 *dwc = dep->dwc; |
1076 | int ret; | |
1077 | ||
bb423984 | 1078 | if (!dep->endpoint.desc) { |
ec5e795c FB |
1079 | dwc3_trace(trace_dwc3_gadget, |
1080 | "trying to queue request %p to disabled %s\n", | |
bb423984 FB |
1081 | &req->request, dep->endpoint.name); |
1082 | return -ESHUTDOWN; | |
1083 | } | |
1084 | ||
1085 | if (WARN(req->dep != dep, "request %p belongs to '%s'\n", | |
1086 | &req->request, req->dep->name)) { | |
ec5e795c FB |
1087 | dwc3_trace(trace_dwc3_gadget, "request %p belongs to '%s'\n", |
1088 | &req->request, req->dep->name); | |
bb423984 FB |
1089 | return -EINVAL; |
1090 | } | |
1091 | ||
72246da4 FB |
1092 | req->request.actual = 0; |
1093 | req->request.status = -EINPROGRESS; | |
1094 | req->direction = dep->direction; | |
1095 | req->epnum = dep->number; | |
1096 | ||
fe84f522 FB |
1097 | trace_dwc3_ep_queue(req); |
1098 | ||
72246da4 FB |
1099 | /* |
1100 | * We only add to our list of requests now and | |
1101 | * start consuming the list once we get XferNotReady | |
1102 | * IRQ. | |
1103 | * | |
1104 | * That way, we avoid doing anything that we don't need | |
1105 | * to do now and defer it until the point we receive a | |
1106 | * particular token from the Host side. | |
1107 | * | |
1108 | * This will also avoid Host cancelling URBs due to too | |
1d046793 | 1109 | * many NAKs. |
72246da4 | 1110 | */ |
0fc9a1be FB |
1111 | ret = usb_gadget_map_request(&dwc->gadget, &req->request, |
1112 | dep->direction); | |
1113 | if (ret) | |
1114 | return ret; | |
1115 | ||
72246da4 FB |
1116 | list_add_tail(&req->list, &dep->request_list); |
1117 | ||
1d6a3918 FB |
1118 | /* |
1119 | * If there are no pending requests and the endpoint isn't already | |
1120 | * busy, we will just start the request straight away. | |
1121 | * | |
1122 | * This will save one IRQ (XFER_NOT_READY) and possibly make it a | |
1123 | * little bit faster. | |
1124 | */ | |
1125 | if (!usb_endpoint_xfer_isoc(dep->endpoint.desc) && | |
62e345ae | 1126 | !usb_endpoint_xfer_int(dep->endpoint.desc) && |
1d6a3918 FB |
1127 | !(dep->flags & DWC3_EP_BUSY)) { |
1128 | ret = __dwc3_gadget_kick_transfer(dep, 0, true); | |
a8f32817 | 1129 | goto out; |
1d6a3918 FB |
1130 | } |
1131 | ||
72246da4 | 1132 | /* |
b511e5e7 | 1133 | * There are a few special cases: |
72246da4 | 1134 | * |
f898ae09 PZ |
1135 | * 1. XferNotReady with empty list of requests. We need to kick the |
1136 | * transfer here in that situation, otherwise we will be NAKing | |
1137 | * forever. If we get XferNotReady before gadget driver has a | |
1138 | * chance to queue a request, we will ACK the IRQ but won't be | |
1139 | * able to receive the data until the next request is queued. | |
1140 | * The following code is handling exactly that. | |
72246da4 | 1141 | * |
72246da4 FB |
1142 | */ |
1143 | if (dep->flags & DWC3_EP_PENDING_REQUEST) { | |
f4a53c55 PA |
1144 | /* |
1145 | * If xfernotready is already elapsed and it is a case | |
1146 | * of isoc transfer, then issue END TRANSFER, so that | |
1147 | * you can receive xfernotready again and can have | |
1148 | * notion of current microframe. | |
1149 | */ | |
1150 | if (usb_endpoint_xfer_isoc(dep->endpoint.desc)) { | |
cdc359dd | 1151 | if (list_empty(&dep->req_queued)) { |
b992e681 | 1152 | dwc3_stop_active_transfer(dwc, dep->number, true); |
cdc359dd PA |
1153 | dep->flags = DWC3_EP_ENABLED; |
1154 | } | |
f4a53c55 PA |
1155 | return 0; |
1156 | } | |
1157 | ||
b511e5e7 | 1158 | ret = __dwc3_gadget_kick_transfer(dep, 0, true); |
89185916 FB |
1159 | if (!ret) |
1160 | dep->flags &= ~DWC3_EP_PENDING_REQUEST; | |
1161 | ||
a8f32817 | 1162 | goto out; |
b511e5e7 | 1163 | } |
72246da4 | 1164 | |
b511e5e7 FB |
1165 | /* |
1166 | * 2. XferInProgress on Isoc EP with an active transfer. We need to | |
1167 | * kick the transfer here after queuing a request, otherwise the | |
1168 | * core may not see the modified TRB(s). | |
1169 | */ | |
1170 | if (usb_endpoint_xfer_isoc(dep->endpoint.desc) && | |
79c9046e PA |
1171 | (dep->flags & DWC3_EP_BUSY) && |
1172 | !(dep->flags & DWC3_EP_MISSED_ISOC)) { | |
b4996a86 FB |
1173 | WARN_ON_ONCE(!dep->resource_index); |
1174 | ret = __dwc3_gadget_kick_transfer(dep, dep->resource_index, | |
b511e5e7 | 1175 | false); |
a8f32817 | 1176 | goto out; |
a0925324 | 1177 | } |
72246da4 | 1178 | |
b997ada5 FB |
1179 | /* |
1180 | * 4. Stream Capable Bulk Endpoints. We need to start the transfer | |
1181 | * right away, otherwise host will not know we have streams to be | |
1182 | * handled. | |
1183 | */ | |
a8f32817 | 1184 | if (dep->stream_capable) |
b997ada5 | 1185 | ret = __dwc3_gadget_kick_transfer(dep, 0, true); |
b997ada5 | 1186 | |
a8f32817 FB |
1187 | out: |
1188 | if (ret && ret != -EBUSY) | |
ec5e795c FB |
1189 | dwc3_trace(trace_dwc3_gadget, |
1190 | "%s: failed to kick transfers\n", | |
a8f32817 FB |
1191 | dep->name); |
1192 | if (ret == -EBUSY) | |
1193 | ret = 0; | |
1194 | ||
1195 | return ret; | |
72246da4 FB |
1196 | } |
1197 | ||
04c03d10 FB |
1198 | static void __dwc3_gadget_ep_zlp_complete(struct usb_ep *ep, |
1199 | struct usb_request *request) | |
1200 | { | |
1201 | dwc3_gadget_ep_free_request(ep, request); | |
1202 | } | |
1203 | ||
1204 | static int __dwc3_gadget_ep_queue_zlp(struct dwc3 *dwc, struct dwc3_ep *dep) | |
1205 | { | |
1206 | struct dwc3_request *req; | |
1207 | struct usb_request *request; | |
1208 | struct usb_ep *ep = &dep->endpoint; | |
1209 | ||
1210 | dwc3_trace(trace_dwc3_gadget, "queueing ZLP\n"); | |
1211 | request = dwc3_gadget_ep_alloc_request(ep, GFP_ATOMIC); | |
1212 | if (!request) | |
1213 | return -ENOMEM; | |
1214 | ||
1215 | request->length = 0; | |
1216 | request->buf = dwc->zlp_buf; | |
1217 | request->complete = __dwc3_gadget_ep_zlp_complete; | |
1218 | ||
1219 | req = to_dwc3_request(request); | |
1220 | ||
1221 | return __dwc3_gadget_ep_queue(dep, req); | |
1222 | } | |
1223 | ||
72246da4 FB |
1224 | static int dwc3_gadget_ep_queue(struct usb_ep *ep, struct usb_request *request, |
1225 | gfp_t gfp_flags) | |
1226 | { | |
1227 | struct dwc3_request *req = to_dwc3_request(request); | |
1228 | struct dwc3_ep *dep = to_dwc3_ep(ep); | |
1229 | struct dwc3 *dwc = dep->dwc; | |
1230 | ||
1231 | unsigned long flags; | |
1232 | ||
1233 | int ret; | |
1234 | ||
fdee4eba | 1235 | spin_lock_irqsave(&dwc->lock, flags); |
72246da4 | 1236 | ret = __dwc3_gadget_ep_queue(dep, req); |
04c03d10 FB |
1237 | |
1238 | /* | |
1239 | * Okay, here's the thing, if gadget driver has requested for a ZLP by | |
1240 | * setting request->zero, instead of doing magic, we will just queue an | |
1241 | * extra usb_request ourselves so that it gets handled the same way as | |
1242 | * any other request. | |
1243 | */ | |
d9261898 JY |
1244 | if (ret == 0 && request->zero && request->length && |
1245 | (request->length % ep->maxpacket == 0)) | |
04c03d10 FB |
1246 | ret = __dwc3_gadget_ep_queue_zlp(dwc, dep); |
1247 | ||
72246da4 FB |
1248 | spin_unlock_irqrestore(&dwc->lock, flags); |
1249 | ||
1250 | return ret; | |
1251 | } | |
1252 | ||
1253 | static int dwc3_gadget_ep_dequeue(struct usb_ep *ep, | |
1254 | struct usb_request *request) | |
1255 | { | |
1256 | struct dwc3_request *req = to_dwc3_request(request); | |
1257 | struct dwc3_request *r = NULL; | |
1258 | ||
1259 | struct dwc3_ep *dep = to_dwc3_ep(ep); | |
1260 | struct dwc3 *dwc = dep->dwc; | |
1261 | ||
1262 | unsigned long flags; | |
1263 | int ret = 0; | |
1264 | ||
2c4cbe6e FB |
1265 | trace_dwc3_ep_dequeue(req); |
1266 | ||
72246da4 FB |
1267 | spin_lock_irqsave(&dwc->lock, flags); |
1268 | ||
1269 | list_for_each_entry(r, &dep->request_list, list) { | |
1270 | if (r == req) | |
1271 | break; | |
1272 | } | |
1273 | ||
1274 | if (r != req) { | |
1275 | list_for_each_entry(r, &dep->req_queued, list) { | |
1276 | if (r == req) | |
1277 | break; | |
1278 | } | |
1279 | if (r == req) { | |
1280 | /* wait until it is processed */ | |
b992e681 | 1281 | dwc3_stop_active_transfer(dwc, dep->number, true); |
e8d4e8be | 1282 | goto out1; |
72246da4 FB |
1283 | } |
1284 | dev_err(dwc->dev, "request %p was not queued to %s\n", | |
1285 | request, ep->name); | |
1286 | ret = -EINVAL; | |
1287 | goto out0; | |
1288 | } | |
1289 | ||
e8d4e8be | 1290 | out1: |
72246da4 FB |
1291 | /* giveback the request */ |
1292 | dwc3_gadget_giveback(dep, req, -ECONNRESET); | |
1293 | ||
1294 | out0: | |
1295 | spin_unlock_irqrestore(&dwc->lock, flags); | |
1296 | ||
1297 | return ret; | |
1298 | } | |
1299 | ||
7a608559 | 1300 | int __dwc3_gadget_ep_set_halt(struct dwc3_ep *dep, int value, int protocol) |
72246da4 FB |
1301 | { |
1302 | struct dwc3_gadget_ep_cmd_params params; | |
1303 | struct dwc3 *dwc = dep->dwc; | |
1304 | int ret; | |
1305 | ||
5ad02fb8 FB |
1306 | if (usb_endpoint_xfer_isoc(dep->endpoint.desc)) { |
1307 | dev_err(dwc->dev, "%s is of Isochronous type\n", dep->name); | |
1308 | return -EINVAL; | |
1309 | } | |
1310 | ||
72246da4 FB |
1311 | memset(¶ms, 0x00, sizeof(params)); |
1312 | ||
1313 | if (value) { | |
7a608559 FB |
1314 | if (!protocol && ((dep->direction && dep->flags & DWC3_EP_BUSY) || |
1315 | (!list_empty(&dep->req_queued) || | |
1316 | !list_empty(&dep->request_list)))) { | |
ec5e795c FB |
1317 | dwc3_trace(trace_dwc3_gadget, |
1318 | "%s: pending request, cannot halt\n", | |
7a608559 FB |
1319 | dep->name); |
1320 | return -EAGAIN; | |
1321 | } | |
1322 | ||
72246da4 FB |
1323 | ret = dwc3_send_gadget_ep_cmd(dwc, dep->number, |
1324 | DWC3_DEPCMD_SETSTALL, ¶ms); | |
1325 | if (ret) | |
3f89204b | 1326 | dev_err(dwc->dev, "failed to set STALL on %s\n", |
72246da4 FB |
1327 | dep->name); |
1328 | else | |
1329 | dep->flags |= DWC3_EP_STALL; | |
1330 | } else { | |
1331 | ret = dwc3_send_gadget_ep_cmd(dwc, dep->number, | |
1332 | DWC3_DEPCMD_CLEARSTALL, ¶ms); | |
1333 | if (ret) | |
3f89204b | 1334 | dev_err(dwc->dev, "failed to clear STALL on %s\n", |
72246da4 FB |
1335 | dep->name); |
1336 | else | |
a535d81c | 1337 | dep->flags &= ~(DWC3_EP_STALL | DWC3_EP_WEDGE); |
72246da4 | 1338 | } |
5275455a | 1339 | |
72246da4 FB |
1340 | return ret; |
1341 | } | |
1342 | ||
1343 | static int dwc3_gadget_ep_set_halt(struct usb_ep *ep, int value) | |
1344 | { | |
1345 | struct dwc3_ep *dep = to_dwc3_ep(ep); | |
1346 | struct dwc3 *dwc = dep->dwc; | |
1347 | ||
1348 | unsigned long flags; | |
1349 | ||
1350 | int ret; | |
1351 | ||
1352 | spin_lock_irqsave(&dwc->lock, flags); | |
7a608559 | 1353 | ret = __dwc3_gadget_ep_set_halt(dep, value, false); |
72246da4 FB |
1354 | spin_unlock_irqrestore(&dwc->lock, flags); |
1355 | ||
1356 | return ret; | |
1357 | } | |
1358 | ||
1359 | static int dwc3_gadget_ep_set_wedge(struct usb_ep *ep) | |
1360 | { | |
1361 | struct dwc3_ep *dep = to_dwc3_ep(ep); | |
249a4569 PZ |
1362 | struct dwc3 *dwc = dep->dwc; |
1363 | unsigned long flags; | |
95aa4e8d | 1364 | int ret; |
72246da4 | 1365 | |
249a4569 | 1366 | spin_lock_irqsave(&dwc->lock, flags); |
72246da4 FB |
1367 | dep->flags |= DWC3_EP_WEDGE; |
1368 | ||
08f0d966 | 1369 | if (dep->number == 0 || dep->number == 1) |
95aa4e8d | 1370 | ret = __dwc3_gadget_ep0_set_halt(ep, 1); |
08f0d966 | 1371 | else |
7a608559 | 1372 | ret = __dwc3_gadget_ep_set_halt(dep, 1, false); |
95aa4e8d FB |
1373 | spin_unlock_irqrestore(&dwc->lock, flags); |
1374 | ||
1375 | return ret; | |
72246da4 FB |
1376 | } |
1377 | ||
1378 | /* -------------------------------------------------------------------------- */ | |
1379 | ||
1380 | static struct usb_endpoint_descriptor dwc3_gadget_ep0_desc = { | |
1381 | .bLength = USB_DT_ENDPOINT_SIZE, | |
1382 | .bDescriptorType = USB_DT_ENDPOINT, | |
1383 | .bmAttributes = USB_ENDPOINT_XFER_CONTROL, | |
1384 | }; | |
1385 | ||
1386 | static const struct usb_ep_ops dwc3_gadget_ep0_ops = { | |
1387 | .enable = dwc3_gadget_ep0_enable, | |
1388 | .disable = dwc3_gadget_ep0_disable, | |
1389 | .alloc_request = dwc3_gadget_ep_alloc_request, | |
1390 | .free_request = dwc3_gadget_ep_free_request, | |
1391 | .queue = dwc3_gadget_ep0_queue, | |
1392 | .dequeue = dwc3_gadget_ep_dequeue, | |
08f0d966 | 1393 | .set_halt = dwc3_gadget_ep0_set_halt, |
72246da4 FB |
1394 | .set_wedge = dwc3_gadget_ep_set_wedge, |
1395 | }; | |
1396 | ||
1397 | static const struct usb_ep_ops dwc3_gadget_ep_ops = { | |
1398 | .enable = dwc3_gadget_ep_enable, | |
1399 | .disable = dwc3_gadget_ep_disable, | |
1400 | .alloc_request = dwc3_gadget_ep_alloc_request, | |
1401 | .free_request = dwc3_gadget_ep_free_request, | |
1402 | .queue = dwc3_gadget_ep_queue, | |
1403 | .dequeue = dwc3_gadget_ep_dequeue, | |
1404 | .set_halt = dwc3_gadget_ep_set_halt, | |
1405 | .set_wedge = dwc3_gadget_ep_set_wedge, | |
1406 | }; | |
1407 | ||
1408 | /* -------------------------------------------------------------------------- */ | |
1409 | ||
1410 | static int dwc3_gadget_get_frame(struct usb_gadget *g) | |
1411 | { | |
1412 | struct dwc3 *dwc = gadget_to_dwc(g); | |
1413 | u32 reg; | |
1414 | ||
1415 | reg = dwc3_readl(dwc->regs, DWC3_DSTS); | |
1416 | return DWC3_DSTS_SOFFN(reg); | |
1417 | } | |
1418 | ||
1419 | static int dwc3_gadget_wakeup(struct usb_gadget *g) | |
1420 | { | |
1421 | struct dwc3 *dwc = gadget_to_dwc(g); | |
1422 | ||
1423 | unsigned long timeout; | |
1424 | unsigned long flags; | |
1425 | ||
1426 | u32 reg; | |
1427 | ||
1428 | int ret = 0; | |
1429 | ||
1430 | u8 link_state; | |
1431 | u8 speed; | |
1432 | ||
1433 | spin_lock_irqsave(&dwc->lock, flags); | |
1434 | ||
1435 | /* | |
1436 | * According to the Databook Remote wakeup request should | |
1437 | * be issued only when the device is in early suspend state. | |
1438 | * | |
1439 | * We can check that via USB Link State bits in DSTS register. | |
1440 | */ | |
1441 | reg = dwc3_readl(dwc->regs, DWC3_DSTS); | |
1442 | ||
1443 | speed = reg & DWC3_DSTS_CONNECTSPD; | |
1444 | if (speed == DWC3_DSTS_SUPERSPEED) { | |
ec5e795c | 1445 | dwc3_trace(trace_dwc3_gadget, "no wakeup on SuperSpeed\n"); |
72246da4 FB |
1446 | ret = -EINVAL; |
1447 | goto out; | |
1448 | } | |
1449 | ||
1450 | link_state = DWC3_DSTS_USBLNKST(reg); | |
1451 | ||
1452 | switch (link_state) { | |
1453 | case DWC3_LINK_STATE_RX_DET: /* in HS, means Early Suspend */ | |
1454 | case DWC3_LINK_STATE_U3: /* in HS, means SUSPEND */ | |
1455 | break; | |
1456 | default: | |
ec5e795c FB |
1457 | dwc3_trace(trace_dwc3_gadget, |
1458 | "can't wakeup from '%s'\n", | |
1459 | dwc3_gadget_link_string(link_state)); | |
72246da4 FB |
1460 | ret = -EINVAL; |
1461 | goto out; | |
1462 | } | |
1463 | ||
8598bde7 FB |
1464 | ret = dwc3_gadget_set_link_state(dwc, DWC3_LINK_STATE_RECOV); |
1465 | if (ret < 0) { | |
1466 | dev_err(dwc->dev, "failed to put link in Recovery\n"); | |
1467 | goto out; | |
1468 | } | |
72246da4 | 1469 | |
802fde98 PZ |
1470 | /* Recent versions do this automatically */ |
1471 | if (dwc->revision < DWC3_REVISION_194A) { | |
1472 | /* write zeroes to Link Change Request */ | |
fcc023c7 | 1473 | reg = dwc3_readl(dwc->regs, DWC3_DCTL); |
802fde98 PZ |
1474 | reg &= ~DWC3_DCTL_ULSTCHNGREQ_MASK; |
1475 | dwc3_writel(dwc->regs, DWC3_DCTL, reg); | |
1476 | } | |
72246da4 | 1477 | |
1d046793 | 1478 | /* poll until Link State changes to ON */ |
72246da4 FB |
1479 | timeout = jiffies + msecs_to_jiffies(100); |
1480 | ||
1d046793 | 1481 | while (!time_after(jiffies, timeout)) { |
72246da4 FB |
1482 | reg = dwc3_readl(dwc->regs, DWC3_DSTS); |
1483 | ||
1484 | /* in HS, means ON */ | |
1485 | if (DWC3_DSTS_USBLNKST(reg) == DWC3_LINK_STATE_U0) | |
1486 | break; | |
1487 | } | |
1488 | ||
1489 | if (DWC3_DSTS_USBLNKST(reg) != DWC3_LINK_STATE_U0) { | |
1490 | dev_err(dwc->dev, "failed to send remote wakeup\n"); | |
1491 | ret = -EINVAL; | |
1492 | } | |
1493 | ||
1494 | out: | |
1495 | spin_unlock_irqrestore(&dwc->lock, flags); | |
1496 | ||
1497 | return ret; | |
1498 | } | |
1499 | ||
1500 | static int dwc3_gadget_set_selfpowered(struct usb_gadget *g, | |
1501 | int is_selfpowered) | |
1502 | { | |
1503 | struct dwc3 *dwc = gadget_to_dwc(g); | |
249a4569 | 1504 | unsigned long flags; |
72246da4 | 1505 | |
249a4569 | 1506 | spin_lock_irqsave(&dwc->lock, flags); |
bcdea503 | 1507 | g->is_selfpowered = !!is_selfpowered; |
249a4569 | 1508 | spin_unlock_irqrestore(&dwc->lock, flags); |
72246da4 FB |
1509 | |
1510 | return 0; | |
1511 | } | |
1512 | ||
7b2a0368 | 1513 | static int dwc3_gadget_run_stop(struct dwc3 *dwc, int is_on, int suspend) |
72246da4 FB |
1514 | { |
1515 | u32 reg; | |
61d58242 | 1516 | u32 timeout = 500; |
72246da4 FB |
1517 | |
1518 | reg = dwc3_readl(dwc->regs, DWC3_DCTL); | |
8db7ed15 | 1519 | if (is_on) { |
802fde98 PZ |
1520 | if (dwc->revision <= DWC3_REVISION_187A) { |
1521 | reg &= ~DWC3_DCTL_TRGTULST_MASK; | |
1522 | reg |= DWC3_DCTL_TRGTULST_RX_DET; | |
1523 | } | |
1524 | ||
1525 | if (dwc->revision >= DWC3_REVISION_194A) | |
1526 | reg &= ~DWC3_DCTL_KEEP_CONNECT; | |
1527 | reg |= DWC3_DCTL_RUN_STOP; | |
7b2a0368 FB |
1528 | |
1529 | if (dwc->has_hibernation) | |
1530 | reg |= DWC3_DCTL_KEEP_CONNECT; | |
1531 | ||
9fcb3bd8 | 1532 | dwc->pullups_connected = true; |
8db7ed15 | 1533 | } else { |
72246da4 | 1534 | reg &= ~DWC3_DCTL_RUN_STOP; |
7b2a0368 FB |
1535 | |
1536 | if (dwc->has_hibernation && !suspend) | |
1537 | reg &= ~DWC3_DCTL_KEEP_CONNECT; | |
1538 | ||
9fcb3bd8 | 1539 | dwc->pullups_connected = false; |
8db7ed15 | 1540 | } |
72246da4 FB |
1541 | |
1542 | dwc3_writel(dwc->regs, DWC3_DCTL, reg); | |
1543 | ||
1544 | do { | |
1545 | reg = dwc3_readl(dwc->regs, DWC3_DSTS); | |
1546 | if (is_on) { | |
1547 | if (!(reg & DWC3_DSTS_DEVCTRLHLT)) | |
1548 | break; | |
1549 | } else { | |
1550 | if (reg & DWC3_DSTS_DEVCTRLHLT) | |
1551 | break; | |
1552 | } | |
72246da4 FB |
1553 | timeout--; |
1554 | if (!timeout) | |
6f17f74b | 1555 | return -ETIMEDOUT; |
61d58242 | 1556 | udelay(1); |
72246da4 FB |
1557 | } while (1); |
1558 | ||
73815280 | 1559 | dwc3_trace(trace_dwc3_gadget, "gadget %s data soft-%s", |
72246da4 FB |
1560 | dwc->gadget_driver |
1561 | ? dwc->gadget_driver->function : "no-function", | |
1562 | is_on ? "connect" : "disconnect"); | |
6f17f74b PA |
1563 | |
1564 | return 0; | |
72246da4 FB |
1565 | } |
1566 | ||
1567 | static int dwc3_gadget_pullup(struct usb_gadget *g, int is_on) | |
1568 | { | |
1569 | struct dwc3 *dwc = gadget_to_dwc(g); | |
1570 | unsigned long flags; | |
6f17f74b | 1571 | int ret; |
72246da4 FB |
1572 | |
1573 | is_on = !!is_on; | |
1574 | ||
1575 | spin_lock_irqsave(&dwc->lock, flags); | |
7b2a0368 | 1576 | ret = dwc3_gadget_run_stop(dwc, is_on, false); |
72246da4 FB |
1577 | spin_unlock_irqrestore(&dwc->lock, flags); |
1578 | ||
6f17f74b | 1579 | return ret; |
72246da4 FB |
1580 | } |
1581 | ||
8698e2ac FB |
1582 | static void dwc3_gadget_enable_irq(struct dwc3 *dwc) |
1583 | { | |
1584 | u32 reg; | |
1585 | ||
1586 | /* Enable all but Start and End of Frame IRQs */ | |
1587 | reg = (DWC3_DEVTEN_VNDRDEVTSTRCVEDEN | | |
1588 | DWC3_DEVTEN_EVNTOVERFLOWEN | | |
1589 | DWC3_DEVTEN_CMDCMPLTEN | | |
1590 | DWC3_DEVTEN_ERRTICERREN | | |
1591 | DWC3_DEVTEN_WKUPEVTEN | | |
1592 | DWC3_DEVTEN_ULSTCNGEN | | |
1593 | DWC3_DEVTEN_CONNECTDONEEN | | |
1594 | DWC3_DEVTEN_USBRSTEN | | |
1595 | DWC3_DEVTEN_DISCONNEVTEN); | |
1596 | ||
1597 | dwc3_writel(dwc->regs, DWC3_DEVTEN, reg); | |
1598 | } | |
1599 | ||
1600 | static void dwc3_gadget_disable_irq(struct dwc3 *dwc) | |
1601 | { | |
1602 | /* mask all interrupts */ | |
1603 | dwc3_writel(dwc->regs, DWC3_DEVTEN, 0x00); | |
1604 | } | |
1605 | ||
1606 | static irqreturn_t dwc3_interrupt(int irq, void *_dwc); | |
b15a762f | 1607 | static irqreturn_t dwc3_thread_interrupt(int irq, void *_dwc); |
8698e2ac | 1608 | |
72246da4 FB |
1609 | static int dwc3_gadget_start(struct usb_gadget *g, |
1610 | struct usb_gadget_driver *driver) | |
1611 | { | |
1612 | struct dwc3 *dwc = gadget_to_dwc(g); | |
1613 | struct dwc3_ep *dep; | |
1614 | unsigned long flags; | |
1615 | int ret = 0; | |
8698e2ac | 1616 | int irq; |
72246da4 FB |
1617 | u32 reg; |
1618 | ||
b0d7ffd4 FB |
1619 | irq = platform_get_irq(to_platform_device(dwc->dev), 0); |
1620 | ret = request_threaded_irq(irq, dwc3_interrupt, dwc3_thread_interrupt, | |
e8adfc30 | 1621 | IRQF_SHARED, "dwc3", dwc); |
b0d7ffd4 FB |
1622 | if (ret) { |
1623 | dev_err(dwc->dev, "failed to request irq #%d --> %d\n", | |
1624 | irq, ret); | |
1625 | goto err0; | |
1626 | } | |
1627 | ||
72246da4 FB |
1628 | spin_lock_irqsave(&dwc->lock, flags); |
1629 | ||
1630 | if (dwc->gadget_driver) { | |
1631 | dev_err(dwc->dev, "%s is already bound to %s\n", | |
1632 | dwc->gadget.name, | |
1633 | dwc->gadget_driver->driver.name); | |
1634 | ret = -EBUSY; | |
b0d7ffd4 | 1635 | goto err1; |
72246da4 FB |
1636 | } |
1637 | ||
1638 | dwc->gadget_driver = driver; | |
72246da4 | 1639 | |
72246da4 FB |
1640 | reg = dwc3_readl(dwc->regs, DWC3_DCFG); |
1641 | reg &= ~(DWC3_DCFG_SPEED_MASK); | |
07e7f47b FB |
1642 | |
1643 | /** | |
1644 | * WORKAROUND: DWC3 revision < 2.20a have an issue | |
1645 | * which would cause metastability state on Run/Stop | |
1646 | * bit if we try to force the IP to USB2-only mode. | |
1647 | * | |
1648 | * Because of that, we cannot configure the IP to any | |
1649 | * speed other than the SuperSpeed | |
1650 | * | |
1651 | * Refers to: | |
1652 | * | |
1653 | * STAR#9000525659: Clock Domain Crossing on DCTL in | |
1654 | * USB 2.0 Mode | |
1655 | */ | |
f7e846f0 | 1656 | if (dwc->revision < DWC3_REVISION_220A) { |
07e7f47b | 1657 | reg |= DWC3_DCFG_SUPERSPEED; |
f7e846f0 FB |
1658 | } else { |
1659 | switch (dwc->maximum_speed) { | |
1660 | case USB_SPEED_LOW: | |
1661 | reg |= DWC3_DSTS_LOWSPEED; | |
1662 | break; | |
1663 | case USB_SPEED_FULL: | |
1664 | reg |= DWC3_DSTS_FULLSPEED1; | |
1665 | break; | |
1666 | case USB_SPEED_HIGH: | |
1667 | reg |= DWC3_DSTS_HIGHSPEED; | |
1668 | break; | |
1669 | case USB_SPEED_SUPER: /* FALLTHROUGH */ | |
1670 | case USB_SPEED_UNKNOWN: /* FALTHROUGH */ | |
1671 | default: | |
1672 | reg |= DWC3_DSTS_SUPERSPEED; | |
1673 | } | |
1674 | } | |
72246da4 FB |
1675 | dwc3_writel(dwc->regs, DWC3_DCFG, reg); |
1676 | ||
1677 | /* Start with SuperSpeed Default */ | |
1678 | dwc3_gadget_ep0_desc.wMaxPacketSize = cpu_to_le16(512); | |
1679 | ||
1680 | dep = dwc->eps[0]; | |
265b70a7 PZ |
1681 | ret = __dwc3_gadget_ep_enable(dep, &dwc3_gadget_ep0_desc, NULL, false, |
1682 | false); | |
72246da4 FB |
1683 | if (ret) { |
1684 | dev_err(dwc->dev, "failed to enable %s\n", dep->name); | |
b0d7ffd4 | 1685 | goto err2; |
72246da4 FB |
1686 | } |
1687 | ||
1688 | dep = dwc->eps[1]; | |
265b70a7 PZ |
1689 | ret = __dwc3_gadget_ep_enable(dep, &dwc3_gadget_ep0_desc, NULL, false, |
1690 | false); | |
72246da4 FB |
1691 | if (ret) { |
1692 | dev_err(dwc->dev, "failed to enable %s\n", dep->name); | |
b0d7ffd4 | 1693 | goto err3; |
72246da4 FB |
1694 | } |
1695 | ||
1696 | /* begin to receive SETUP packets */ | |
c7fcdeb2 | 1697 | dwc->ep0state = EP0_SETUP_PHASE; |
72246da4 FB |
1698 | dwc3_ep0_out_start(dwc); |
1699 | ||
8698e2ac FB |
1700 | dwc3_gadget_enable_irq(dwc); |
1701 | ||
72246da4 FB |
1702 | spin_unlock_irqrestore(&dwc->lock, flags); |
1703 | ||
1704 | return 0; | |
1705 | ||
b0d7ffd4 | 1706 | err3: |
72246da4 FB |
1707 | __dwc3_gadget_ep_disable(dwc->eps[0]); |
1708 | ||
b0d7ffd4 | 1709 | err2: |
cdcedd69 | 1710 | dwc->gadget_driver = NULL; |
b0d7ffd4 FB |
1711 | |
1712 | err1: | |
72246da4 FB |
1713 | spin_unlock_irqrestore(&dwc->lock, flags); |
1714 | ||
b0d7ffd4 FB |
1715 | free_irq(irq, dwc); |
1716 | ||
1717 | err0: | |
72246da4 FB |
1718 | return ret; |
1719 | } | |
1720 | ||
22835b80 | 1721 | static int dwc3_gadget_stop(struct usb_gadget *g) |
72246da4 FB |
1722 | { |
1723 | struct dwc3 *dwc = gadget_to_dwc(g); | |
1724 | unsigned long flags; | |
8698e2ac | 1725 | int irq; |
72246da4 FB |
1726 | |
1727 | spin_lock_irqsave(&dwc->lock, flags); | |
1728 | ||
8698e2ac | 1729 | dwc3_gadget_disable_irq(dwc); |
72246da4 FB |
1730 | __dwc3_gadget_ep_disable(dwc->eps[0]); |
1731 | __dwc3_gadget_ep_disable(dwc->eps[1]); | |
1732 | ||
1733 | dwc->gadget_driver = NULL; | |
72246da4 FB |
1734 | |
1735 | spin_unlock_irqrestore(&dwc->lock, flags); | |
1736 | ||
b0d7ffd4 FB |
1737 | irq = platform_get_irq(to_platform_device(dwc->dev), 0); |
1738 | free_irq(irq, dwc); | |
1739 | ||
72246da4 FB |
1740 | return 0; |
1741 | } | |
802fde98 | 1742 | |
72246da4 FB |
1743 | static const struct usb_gadget_ops dwc3_gadget_ops = { |
1744 | .get_frame = dwc3_gadget_get_frame, | |
1745 | .wakeup = dwc3_gadget_wakeup, | |
1746 | .set_selfpowered = dwc3_gadget_set_selfpowered, | |
1747 | .pullup = dwc3_gadget_pullup, | |
1748 | .udc_start = dwc3_gadget_start, | |
1749 | .udc_stop = dwc3_gadget_stop, | |
1750 | }; | |
1751 | ||
1752 | /* -------------------------------------------------------------------------- */ | |
1753 | ||
6a1e3ef4 FB |
1754 | static int dwc3_gadget_init_hw_endpoints(struct dwc3 *dwc, |
1755 | u8 num, u32 direction) | |
72246da4 FB |
1756 | { |
1757 | struct dwc3_ep *dep; | |
6a1e3ef4 | 1758 | u8 i; |
72246da4 | 1759 | |
6a1e3ef4 FB |
1760 | for (i = 0; i < num; i++) { |
1761 | u8 epnum = (i << 1) | (!!direction); | |
72246da4 | 1762 | |
72246da4 | 1763 | dep = kzalloc(sizeof(*dep), GFP_KERNEL); |
734d5a53 | 1764 | if (!dep) |
72246da4 | 1765 | return -ENOMEM; |
72246da4 FB |
1766 | |
1767 | dep->dwc = dwc; | |
1768 | dep->number = epnum; | |
9aa62ae4 | 1769 | dep->direction = !!direction; |
72246da4 FB |
1770 | dwc->eps[epnum] = dep; |
1771 | ||
1772 | snprintf(dep->name, sizeof(dep->name), "ep%d%s", epnum >> 1, | |
1773 | (epnum & 1) ? "in" : "out"); | |
6a1e3ef4 | 1774 | |
72246da4 | 1775 | dep->endpoint.name = dep->name; |
72246da4 | 1776 | |
73815280 | 1777 | dwc3_trace(trace_dwc3_gadget, "initializing %s", dep->name); |
653df35e | 1778 | |
72246da4 | 1779 | if (epnum == 0 || epnum == 1) { |
e117e742 | 1780 | usb_ep_set_maxpacket_limit(&dep->endpoint, 512); |
6048e4c6 | 1781 | dep->endpoint.maxburst = 1; |
72246da4 FB |
1782 | dep->endpoint.ops = &dwc3_gadget_ep0_ops; |
1783 | if (!epnum) | |
1784 | dwc->gadget.ep0 = &dep->endpoint; | |
1785 | } else { | |
1786 | int ret; | |
1787 | ||
e117e742 | 1788 | usb_ep_set_maxpacket_limit(&dep->endpoint, 1024); |
12d36c16 | 1789 | dep->endpoint.max_streams = 15; |
72246da4 FB |
1790 | dep->endpoint.ops = &dwc3_gadget_ep_ops; |
1791 | list_add_tail(&dep->endpoint.ep_list, | |
1792 | &dwc->gadget.ep_list); | |
1793 | ||
1794 | ret = dwc3_alloc_trb_pool(dep); | |
25b8ff68 | 1795 | if (ret) |
72246da4 | 1796 | return ret; |
72246da4 | 1797 | } |
25b8ff68 | 1798 | |
a474d3b7 RB |
1799 | if (epnum == 0 || epnum == 1) { |
1800 | dep->endpoint.caps.type_control = true; | |
1801 | } else { | |
1802 | dep->endpoint.caps.type_iso = true; | |
1803 | dep->endpoint.caps.type_bulk = true; | |
1804 | dep->endpoint.caps.type_int = true; | |
1805 | } | |
1806 | ||
1807 | dep->endpoint.caps.dir_in = !!direction; | |
1808 | dep->endpoint.caps.dir_out = !direction; | |
1809 | ||
72246da4 FB |
1810 | INIT_LIST_HEAD(&dep->request_list); |
1811 | INIT_LIST_HEAD(&dep->req_queued); | |
1812 | } | |
1813 | ||
1814 | return 0; | |
1815 | } | |
1816 | ||
6a1e3ef4 FB |
1817 | static int dwc3_gadget_init_endpoints(struct dwc3 *dwc) |
1818 | { | |
1819 | int ret; | |
1820 | ||
1821 | INIT_LIST_HEAD(&dwc->gadget.ep_list); | |
1822 | ||
1823 | ret = dwc3_gadget_init_hw_endpoints(dwc, dwc->num_out_eps, 0); | |
1824 | if (ret < 0) { | |
73815280 FB |
1825 | dwc3_trace(trace_dwc3_gadget, |
1826 | "failed to allocate OUT endpoints"); | |
6a1e3ef4 FB |
1827 | return ret; |
1828 | } | |
1829 | ||
1830 | ret = dwc3_gadget_init_hw_endpoints(dwc, dwc->num_in_eps, 1); | |
1831 | if (ret < 0) { | |
73815280 FB |
1832 | dwc3_trace(trace_dwc3_gadget, |
1833 | "failed to allocate IN endpoints"); | |
6a1e3ef4 FB |
1834 | return ret; |
1835 | } | |
1836 | ||
1837 | return 0; | |
1838 | } | |
1839 | ||
72246da4 FB |
1840 | static void dwc3_gadget_free_endpoints(struct dwc3 *dwc) |
1841 | { | |
1842 | struct dwc3_ep *dep; | |
1843 | u8 epnum; | |
1844 | ||
1845 | for (epnum = 0; epnum < DWC3_ENDPOINTS_NUM; epnum++) { | |
1846 | dep = dwc->eps[epnum]; | |
6a1e3ef4 FB |
1847 | if (!dep) |
1848 | continue; | |
5bf8fae3 GC |
1849 | /* |
1850 | * Physical endpoints 0 and 1 are special; they form the | |
1851 | * bi-directional USB endpoint 0. | |
1852 | * | |
1853 | * For those two physical endpoints, we don't allocate a TRB | |
1854 | * pool nor do we add them the endpoints list. Due to that, we | |
1855 | * shouldn't do these two operations otherwise we would end up | |
1856 | * with all sorts of bugs when removing dwc3.ko. | |
1857 | */ | |
1858 | if (epnum != 0 && epnum != 1) { | |
1859 | dwc3_free_trb_pool(dep); | |
72246da4 | 1860 | list_del(&dep->endpoint.ep_list); |
5bf8fae3 | 1861 | } |
72246da4 FB |
1862 | |
1863 | kfree(dep); | |
1864 | } | |
1865 | } | |
1866 | ||
72246da4 | 1867 | /* -------------------------------------------------------------------------- */ |
e5caff68 | 1868 | |
e5ba5ec8 PA |
1869 | static int __dwc3_cleanup_done_trbs(struct dwc3 *dwc, struct dwc3_ep *dep, |
1870 | struct dwc3_request *req, struct dwc3_trb *trb, | |
72246da4 FB |
1871 | const struct dwc3_event_depevt *event, int status) |
1872 | { | |
72246da4 FB |
1873 | unsigned int count; |
1874 | unsigned int s_pkt = 0; | |
d6d6ec7b | 1875 | unsigned int trb_status; |
72246da4 | 1876 | |
2c4cbe6e FB |
1877 | trace_dwc3_complete_trb(dep, trb); |
1878 | ||
e5ba5ec8 PA |
1879 | if ((trb->ctrl & DWC3_TRB_CTRL_HWO) && status != -ESHUTDOWN) |
1880 | /* | |
1881 | * We continue despite the error. There is not much we | |
1882 | * can do. If we don't clean it up we loop forever. If | |
1883 | * we skip the TRB then it gets overwritten after a | |
1884 | * while since we use them in a ring buffer. A BUG() | |
1885 | * would help. Lets hope that if this occurs, someone | |
1886 | * fixes the root cause instead of looking away :) | |
1887 | */ | |
1888 | dev_err(dwc->dev, "%s's TRB (%p) still owned by HW\n", | |
1889 | dep->name, trb); | |
1890 | count = trb->size & DWC3_TRB_SIZE_MASK; | |
1891 | ||
1892 | if (dep->direction) { | |
1893 | if (count) { | |
1894 | trb_status = DWC3_TRB_SIZE_TRBSTS(trb->size); | |
1895 | if (trb_status == DWC3_TRBSTS_MISSED_ISOC) { | |
ec5e795c FB |
1896 | dwc3_trace(trace_dwc3_gadget, |
1897 | "%s: incomplete IN transfer\n", | |
e5ba5ec8 PA |
1898 | dep->name); |
1899 | /* | |
1900 | * If missed isoc occurred and there is | |
1901 | * no request queued then issue END | |
1902 | * TRANSFER, so that core generates | |
1903 | * next xfernotready and we will issue | |
1904 | * a fresh START TRANSFER. | |
1905 | * If there are still queued request | |
1906 | * then wait, do not issue either END | |
1907 | * or UPDATE TRANSFER, just attach next | |
1908 | * request in request_list during | |
1909 | * giveback.If any future queued request | |
1910 | * is successfully transferred then we | |
1911 | * will issue UPDATE TRANSFER for all | |
1912 | * request in the request_list. | |
1913 | */ | |
1914 | dep->flags |= DWC3_EP_MISSED_ISOC; | |
1915 | } else { | |
1916 | dev_err(dwc->dev, "incomplete IN transfer %s\n", | |
1917 | dep->name); | |
1918 | status = -ECONNRESET; | |
1919 | } | |
1920 | } else { | |
1921 | dep->flags &= ~DWC3_EP_MISSED_ISOC; | |
1922 | } | |
1923 | } else { | |
1924 | if (count && (event->status & DEPEVT_STATUS_SHORT)) | |
1925 | s_pkt = 1; | |
1926 | } | |
1927 | ||
1928 | /* | |
1929 | * We assume here we will always receive the entire data block | |
1930 | * which we should receive. Meaning, if we program RX to | |
1931 | * receive 4K but we receive only 2K, we assume that's all we | |
1932 | * should receive and we simply bounce the request back to the | |
1933 | * gadget driver for further processing. | |
1934 | */ | |
1935 | req->request.actual += req->request.length - count; | |
1936 | if (s_pkt) | |
1937 | return 1; | |
1938 | if ((event->status & DEPEVT_STATUS_LST) && | |
1939 | (trb->ctrl & (DWC3_TRB_CTRL_LST | | |
1940 | DWC3_TRB_CTRL_HWO))) | |
1941 | return 1; | |
1942 | if ((event->status & DEPEVT_STATUS_IOC) && | |
1943 | (trb->ctrl & DWC3_TRB_CTRL_IOC)) | |
1944 | return 1; | |
1945 | return 0; | |
1946 | } | |
1947 | ||
1948 | static int dwc3_cleanup_done_reqs(struct dwc3 *dwc, struct dwc3_ep *dep, | |
1949 | const struct dwc3_event_depevt *event, int status) | |
1950 | { | |
1951 | struct dwc3_request *req; | |
1952 | struct dwc3_trb *trb; | |
1953 | unsigned int slot; | |
1954 | unsigned int i; | |
1955 | int ret; | |
1956 | ||
72246da4 | 1957 | do { |
d115d705 | 1958 | req = next_request(&dep->req_queued); |
ac7bdcc1 | 1959 | if (WARN_ON_ONCE(!req)) |
d115d705 | 1960 | return 1; |
ac7bdcc1 | 1961 | |
d115d705 VS |
1962 | i = 0; |
1963 | do { | |
1964 | slot = req->start_slot + i; | |
1965 | if ((slot == DWC3_TRB_NUM - 1) && | |
e5ba5ec8 | 1966 | usb_endpoint_xfer_isoc(dep->endpoint.desc)) |
d115d705 VS |
1967 | slot++; |
1968 | slot %= DWC3_TRB_NUM; | |
1969 | trb = &dep->trb_pool[slot]; | |
1970 | ||
1971 | ret = __dwc3_cleanup_done_trbs(dwc, dep, req, trb, | |
1972 | event, status); | |
1973 | if (ret) | |
1974 | break; | |
1975 | } while (++i < req->request.num_mapped_sgs); | |
1976 | ||
1977 | dwc3_gadget_giveback(dep, req, status); | |
e5ba5ec8 PA |
1978 | |
1979 | if (ret) | |
72246da4 | 1980 | break; |
d115d705 | 1981 | } while (1); |
72246da4 | 1982 | |
cdc359dd PA |
1983 | if (usb_endpoint_xfer_isoc(dep->endpoint.desc) && |
1984 | list_empty(&dep->req_queued)) { | |
1985 | if (list_empty(&dep->request_list)) { | |
1986 | /* | |
1987 | * If there is no entry in request list then do | |
1988 | * not issue END TRANSFER now. Just set PENDING | |
1989 | * flag, so that END TRANSFER is issued when an | |
1990 | * entry is added into request list. | |
1991 | */ | |
1992 | dep->flags = DWC3_EP_PENDING_REQUEST; | |
1993 | } else { | |
b992e681 | 1994 | dwc3_stop_active_transfer(dwc, dep->number, true); |
cdc359dd PA |
1995 | dep->flags = DWC3_EP_ENABLED; |
1996 | } | |
7efea86c PA |
1997 | return 1; |
1998 | } | |
1999 | ||
72246da4 FB |
2000 | return 1; |
2001 | } | |
2002 | ||
2003 | static void dwc3_endpoint_transfer_complete(struct dwc3 *dwc, | |
029d97ff | 2004 | struct dwc3_ep *dep, const struct dwc3_event_depevt *event) |
72246da4 FB |
2005 | { |
2006 | unsigned status = 0; | |
2007 | int clean_busy; | |
e18b7975 FB |
2008 | u32 is_xfer_complete; |
2009 | ||
2010 | is_xfer_complete = (event->endpoint_event == DWC3_DEPEVT_XFERCOMPLETE); | |
72246da4 FB |
2011 | |
2012 | if (event->status & DEPEVT_STATUS_BUSERR) | |
2013 | status = -ECONNRESET; | |
2014 | ||
1d046793 | 2015 | clean_busy = dwc3_cleanup_done_reqs(dwc, dep, event, status); |
e18b7975 FB |
2016 | if (clean_busy && (is_xfer_complete || |
2017 | usb_endpoint_xfer_isoc(dep->endpoint.desc))) | |
72246da4 | 2018 | dep->flags &= ~DWC3_EP_BUSY; |
fae2b904 FB |
2019 | |
2020 | /* | |
2021 | * WORKAROUND: This is the 2nd half of U1/U2 -> U0 workaround. | |
2022 | * See dwc3_gadget_linksts_change_interrupt() for 1st half. | |
2023 | */ | |
2024 | if (dwc->revision < DWC3_REVISION_183A) { | |
2025 | u32 reg; | |
2026 | int i; | |
2027 | ||
2028 | for (i = 0; i < DWC3_ENDPOINTS_NUM; i++) { | |
348e026f | 2029 | dep = dwc->eps[i]; |
fae2b904 FB |
2030 | |
2031 | if (!(dep->flags & DWC3_EP_ENABLED)) | |
2032 | continue; | |
2033 | ||
2034 | if (!list_empty(&dep->req_queued)) | |
2035 | return; | |
2036 | } | |
2037 | ||
2038 | reg = dwc3_readl(dwc->regs, DWC3_DCTL); | |
2039 | reg |= dwc->u1u2; | |
2040 | dwc3_writel(dwc->regs, DWC3_DCTL, reg); | |
2041 | ||
2042 | dwc->u1u2 = 0; | |
2043 | } | |
8a1a9c9e | 2044 | |
e6e709b7 | 2045 | if (!usb_endpoint_xfer_isoc(dep->endpoint.desc)) { |
8a1a9c9e FB |
2046 | int ret; |
2047 | ||
e6e709b7 | 2048 | ret = __dwc3_gadget_kick_transfer(dep, 0, is_xfer_complete); |
8a1a9c9e FB |
2049 | if (!ret || ret == -EBUSY) |
2050 | return; | |
2051 | } | |
72246da4 FB |
2052 | } |
2053 | ||
72246da4 FB |
2054 | static void dwc3_endpoint_interrupt(struct dwc3 *dwc, |
2055 | const struct dwc3_event_depevt *event) | |
2056 | { | |
2057 | struct dwc3_ep *dep; | |
2058 | u8 epnum = event->endpoint_number; | |
2059 | ||
2060 | dep = dwc->eps[epnum]; | |
2061 | ||
3336abb5 FB |
2062 | if (!(dep->flags & DWC3_EP_ENABLED)) |
2063 | return; | |
2064 | ||
72246da4 FB |
2065 | if (epnum == 0 || epnum == 1) { |
2066 | dwc3_ep0_interrupt(dwc, event); | |
2067 | return; | |
2068 | } | |
2069 | ||
2070 | switch (event->endpoint_event) { | |
2071 | case DWC3_DEPEVT_XFERCOMPLETE: | |
b4996a86 | 2072 | dep->resource_index = 0; |
c2df85ca | 2073 | |
16e78db7 | 2074 | if (usb_endpoint_xfer_isoc(dep->endpoint.desc)) { |
ec5e795c FB |
2075 | dwc3_trace(trace_dwc3_gadget, |
2076 | "%s is an Isochronous endpoint\n", | |
72246da4 FB |
2077 | dep->name); |
2078 | return; | |
2079 | } | |
2080 | ||
029d97ff | 2081 | dwc3_endpoint_transfer_complete(dwc, dep, event); |
72246da4 FB |
2082 | break; |
2083 | case DWC3_DEPEVT_XFERINPROGRESS: | |
029d97ff | 2084 | dwc3_endpoint_transfer_complete(dwc, dep, event); |
72246da4 FB |
2085 | break; |
2086 | case DWC3_DEPEVT_XFERNOTREADY: | |
16e78db7 | 2087 | if (usb_endpoint_xfer_isoc(dep->endpoint.desc)) { |
72246da4 FB |
2088 | dwc3_gadget_start_isoc(dwc, dep, event); |
2089 | } else { | |
6bb4fe12 | 2090 | int active; |
72246da4 FB |
2091 | int ret; |
2092 | ||
6bb4fe12 FB |
2093 | active = event->status & DEPEVT_STATUS_TRANSFER_ACTIVE; |
2094 | ||
73815280 | 2095 | dwc3_trace(trace_dwc3_gadget, "%s: reason %s", |
6bb4fe12 | 2096 | dep->name, active ? "Transfer Active" |
72246da4 FB |
2097 | : "Transfer Not Active"); |
2098 | ||
6bb4fe12 | 2099 | ret = __dwc3_gadget_kick_transfer(dep, 0, !active); |
72246da4 FB |
2100 | if (!ret || ret == -EBUSY) |
2101 | return; | |
2102 | ||
ec5e795c FB |
2103 | dwc3_trace(trace_dwc3_gadget, |
2104 | "%s: failed to kick transfers\n", | |
72246da4 FB |
2105 | dep->name); |
2106 | } | |
2107 | ||
879631aa FB |
2108 | break; |
2109 | case DWC3_DEPEVT_STREAMEVT: | |
16e78db7 | 2110 | if (!usb_endpoint_xfer_bulk(dep->endpoint.desc)) { |
879631aa FB |
2111 | dev_err(dwc->dev, "Stream event for non-Bulk %s\n", |
2112 | dep->name); | |
2113 | return; | |
2114 | } | |
2115 | ||
2116 | switch (event->status) { | |
2117 | case DEPEVT_STREAMEVT_FOUND: | |
73815280 FB |
2118 | dwc3_trace(trace_dwc3_gadget, |
2119 | "Stream %d found and started", | |
879631aa FB |
2120 | event->parameters); |
2121 | ||
2122 | break; | |
2123 | case DEPEVT_STREAMEVT_NOTFOUND: | |
2124 | /* FALLTHROUGH */ | |
2125 | default: | |
ec5e795c FB |
2126 | dwc3_trace(trace_dwc3_gadget, |
2127 | "unable to find suitable stream\n"); | |
879631aa | 2128 | } |
72246da4 FB |
2129 | break; |
2130 | case DWC3_DEPEVT_RXTXFIFOEVT: | |
ec5e795c | 2131 | dwc3_trace(trace_dwc3_gadget, "%s FIFO Overrun\n", dep->name); |
72246da4 | 2132 | break; |
72246da4 | 2133 | case DWC3_DEPEVT_EPCMDCMPLT: |
73815280 | 2134 | dwc3_trace(trace_dwc3_gadget, "Endpoint Command Complete"); |
72246da4 FB |
2135 | break; |
2136 | } | |
2137 | } | |
2138 | ||
2139 | static void dwc3_disconnect_gadget(struct dwc3 *dwc) | |
2140 | { | |
2141 | if (dwc->gadget_driver && dwc->gadget_driver->disconnect) { | |
2142 | spin_unlock(&dwc->lock); | |
2143 | dwc->gadget_driver->disconnect(&dwc->gadget); | |
2144 | spin_lock(&dwc->lock); | |
2145 | } | |
2146 | } | |
2147 | ||
bc5ba2e0 FB |
2148 | static void dwc3_suspend_gadget(struct dwc3 *dwc) |
2149 | { | |
73a30bfc | 2150 | if (dwc->gadget_driver && dwc->gadget_driver->suspend) { |
bc5ba2e0 FB |
2151 | spin_unlock(&dwc->lock); |
2152 | dwc->gadget_driver->suspend(&dwc->gadget); | |
2153 | spin_lock(&dwc->lock); | |
2154 | } | |
2155 | } | |
2156 | ||
2157 | static void dwc3_resume_gadget(struct dwc3 *dwc) | |
2158 | { | |
73a30bfc | 2159 | if (dwc->gadget_driver && dwc->gadget_driver->resume) { |
bc5ba2e0 FB |
2160 | spin_unlock(&dwc->lock); |
2161 | dwc->gadget_driver->resume(&dwc->gadget); | |
5c7b3b02 | 2162 | spin_lock(&dwc->lock); |
8e74475b FB |
2163 | } |
2164 | } | |
2165 | ||
2166 | static void dwc3_reset_gadget(struct dwc3 *dwc) | |
2167 | { | |
2168 | if (!dwc->gadget_driver) | |
2169 | return; | |
2170 | ||
2171 | if (dwc->gadget.speed != USB_SPEED_UNKNOWN) { | |
2172 | spin_unlock(&dwc->lock); | |
2173 | usb_gadget_udc_reset(&dwc->gadget, dwc->gadget_driver); | |
bc5ba2e0 FB |
2174 | spin_lock(&dwc->lock); |
2175 | } | |
2176 | } | |
2177 | ||
b992e681 | 2178 | static void dwc3_stop_active_transfer(struct dwc3 *dwc, u32 epnum, bool force) |
72246da4 FB |
2179 | { |
2180 | struct dwc3_ep *dep; | |
2181 | struct dwc3_gadget_ep_cmd_params params; | |
2182 | u32 cmd; | |
2183 | int ret; | |
2184 | ||
2185 | dep = dwc->eps[epnum]; | |
2186 | ||
b4996a86 | 2187 | if (!dep->resource_index) |
3daf74d7 PA |
2188 | return; |
2189 | ||
57911504 PA |
2190 | /* |
2191 | * NOTICE: We are violating what the Databook says about the | |
2192 | * EndTransfer command. Ideally we would _always_ wait for the | |
2193 | * EndTransfer Command Completion IRQ, but that's causing too | |
2194 | * much trouble synchronizing between us and gadget driver. | |
2195 | * | |
2196 | * We have discussed this with the IP Provider and it was | |
2197 | * suggested to giveback all requests here, but give HW some | |
2198 | * extra time to synchronize with the interconnect. We're using | |
dc93b41a | 2199 | * an arbitrary 100us delay for that. |
57911504 PA |
2200 | * |
2201 | * Note also that a similar handling was tested by Synopsys | |
2202 | * (thanks a lot Paul) and nothing bad has come out of it. | |
2203 | * In short, what we're doing is: | |
2204 | * | |
2205 | * - Issue EndTransfer WITH CMDIOC bit set | |
2206 | * - Wait 100us | |
2207 | */ | |
2208 | ||
3daf74d7 | 2209 | cmd = DWC3_DEPCMD_ENDTRANSFER; |
b992e681 PZ |
2210 | cmd |= force ? DWC3_DEPCMD_HIPRI_FORCERM : 0; |
2211 | cmd |= DWC3_DEPCMD_CMDIOC; | |
b4996a86 | 2212 | cmd |= DWC3_DEPCMD_PARAM(dep->resource_index); |
3daf74d7 PA |
2213 | memset(¶ms, 0, sizeof(params)); |
2214 | ret = dwc3_send_gadget_ep_cmd(dwc, dep->number, cmd, ¶ms); | |
2215 | WARN_ON_ONCE(ret); | |
b4996a86 | 2216 | dep->resource_index = 0; |
041d81f4 | 2217 | dep->flags &= ~DWC3_EP_BUSY; |
57911504 | 2218 | udelay(100); |
72246da4 FB |
2219 | } |
2220 | ||
2221 | static void dwc3_stop_active_transfers(struct dwc3 *dwc) | |
2222 | { | |
2223 | u32 epnum; | |
2224 | ||
2225 | for (epnum = 2; epnum < DWC3_ENDPOINTS_NUM; epnum++) { | |
2226 | struct dwc3_ep *dep; | |
2227 | ||
2228 | dep = dwc->eps[epnum]; | |
6a1e3ef4 FB |
2229 | if (!dep) |
2230 | continue; | |
2231 | ||
72246da4 FB |
2232 | if (!(dep->flags & DWC3_EP_ENABLED)) |
2233 | continue; | |
2234 | ||
624407f9 | 2235 | dwc3_remove_requests(dwc, dep); |
72246da4 FB |
2236 | } |
2237 | } | |
2238 | ||
2239 | static void dwc3_clear_stall_all_ep(struct dwc3 *dwc) | |
2240 | { | |
2241 | u32 epnum; | |
2242 | ||
2243 | for (epnum = 1; epnum < DWC3_ENDPOINTS_NUM; epnum++) { | |
2244 | struct dwc3_ep *dep; | |
2245 | struct dwc3_gadget_ep_cmd_params params; | |
2246 | int ret; | |
2247 | ||
2248 | dep = dwc->eps[epnum]; | |
6a1e3ef4 FB |
2249 | if (!dep) |
2250 | continue; | |
72246da4 FB |
2251 | |
2252 | if (!(dep->flags & DWC3_EP_STALL)) | |
2253 | continue; | |
2254 | ||
2255 | dep->flags &= ~DWC3_EP_STALL; | |
2256 | ||
2257 | memset(¶ms, 0, sizeof(params)); | |
2258 | ret = dwc3_send_gadget_ep_cmd(dwc, dep->number, | |
2259 | DWC3_DEPCMD_CLEARSTALL, ¶ms); | |
2260 | WARN_ON_ONCE(ret); | |
2261 | } | |
2262 | } | |
2263 | ||
2264 | static void dwc3_gadget_disconnect_interrupt(struct dwc3 *dwc) | |
2265 | { | |
c4430a26 FB |
2266 | int reg; |
2267 | ||
72246da4 FB |
2268 | reg = dwc3_readl(dwc->regs, DWC3_DCTL); |
2269 | reg &= ~DWC3_DCTL_INITU1ENA; | |
2270 | dwc3_writel(dwc->regs, DWC3_DCTL, reg); | |
2271 | ||
2272 | reg &= ~DWC3_DCTL_INITU2ENA; | |
2273 | dwc3_writel(dwc->regs, DWC3_DCTL, reg); | |
72246da4 | 2274 | |
72246da4 FB |
2275 | dwc3_disconnect_gadget(dwc); |
2276 | ||
2277 | dwc->gadget.speed = USB_SPEED_UNKNOWN; | |
df62df56 | 2278 | dwc->setup_packet_pending = false; |
06a374ed | 2279 | usb_gadget_set_state(&dwc->gadget, USB_STATE_NOTATTACHED); |
72246da4 FB |
2280 | } |
2281 | ||
72246da4 FB |
2282 | static void dwc3_gadget_reset_interrupt(struct dwc3 *dwc) |
2283 | { | |
2284 | u32 reg; | |
2285 | ||
df62df56 FB |
2286 | /* |
2287 | * WORKAROUND: DWC3 revisions <1.88a have an issue which | |
2288 | * would cause a missing Disconnect Event if there's a | |
2289 | * pending Setup Packet in the FIFO. | |
2290 | * | |
2291 | * There's no suggested workaround on the official Bug | |
2292 | * report, which states that "unless the driver/application | |
2293 | * is doing any special handling of a disconnect event, | |
2294 | * there is no functional issue". | |
2295 | * | |
2296 | * Unfortunately, it turns out that we _do_ some special | |
2297 | * handling of a disconnect event, namely complete all | |
2298 | * pending transfers, notify gadget driver of the | |
2299 | * disconnection, and so on. | |
2300 | * | |
2301 | * Our suggested workaround is to follow the Disconnect | |
2302 | * Event steps here, instead, based on a setup_packet_pending | |
b5d335e5 FB |
2303 | * flag. Such flag gets set whenever we have a SETUP_PENDING |
2304 | * status for EP0 TRBs and gets cleared on XferComplete for the | |
df62df56 FB |
2305 | * same endpoint. |
2306 | * | |
2307 | * Refers to: | |
2308 | * | |
2309 | * STAR#9000466709: RTL: Device : Disconnect event not | |
2310 | * generated if setup packet pending in FIFO | |
2311 | */ | |
2312 | if (dwc->revision < DWC3_REVISION_188A) { | |
2313 | if (dwc->setup_packet_pending) | |
2314 | dwc3_gadget_disconnect_interrupt(dwc); | |
2315 | } | |
2316 | ||
8e74475b | 2317 | dwc3_reset_gadget(dwc); |
72246da4 FB |
2318 | |
2319 | reg = dwc3_readl(dwc->regs, DWC3_DCTL); | |
2320 | reg &= ~DWC3_DCTL_TSTCTRL_MASK; | |
2321 | dwc3_writel(dwc->regs, DWC3_DCTL, reg); | |
3b637367 | 2322 | dwc->test_mode = false; |
72246da4 FB |
2323 | |
2324 | dwc3_stop_active_transfers(dwc); | |
2325 | dwc3_clear_stall_all_ep(dwc); | |
2326 | ||
2327 | /* Reset device address to zero */ | |
2328 | reg = dwc3_readl(dwc->regs, DWC3_DCFG); | |
2329 | reg &= ~(DWC3_DCFG_DEVADDR_MASK); | |
2330 | dwc3_writel(dwc->regs, DWC3_DCFG, reg); | |
72246da4 FB |
2331 | } |
2332 | ||
2333 | static void dwc3_update_ram_clk_sel(struct dwc3 *dwc, u32 speed) | |
2334 | { | |
2335 | u32 reg; | |
2336 | u32 usb30_clock = DWC3_GCTL_CLK_BUS; | |
2337 | ||
2338 | /* | |
2339 | * We change the clock only at SS but I dunno why I would want to do | |
2340 | * this. Maybe it becomes part of the power saving plan. | |
2341 | */ | |
2342 | ||
2343 | if (speed != DWC3_DSTS_SUPERSPEED) | |
2344 | return; | |
2345 | ||
2346 | /* | |
2347 | * RAMClkSel is reset to 0 after USB reset, so it must be reprogrammed | |
2348 | * each time on Connect Done. | |
2349 | */ | |
2350 | if (!usb30_clock) | |
2351 | return; | |
2352 | ||
2353 | reg = dwc3_readl(dwc->regs, DWC3_GCTL); | |
2354 | reg |= DWC3_GCTL_RAMCLKSEL(usb30_clock); | |
2355 | dwc3_writel(dwc->regs, DWC3_GCTL, reg); | |
2356 | } | |
2357 | ||
72246da4 FB |
2358 | static void dwc3_gadget_conndone_interrupt(struct dwc3 *dwc) |
2359 | { | |
72246da4 FB |
2360 | struct dwc3_ep *dep; |
2361 | int ret; | |
2362 | u32 reg; | |
2363 | u8 speed; | |
2364 | ||
72246da4 FB |
2365 | reg = dwc3_readl(dwc->regs, DWC3_DSTS); |
2366 | speed = reg & DWC3_DSTS_CONNECTSPD; | |
2367 | dwc->speed = speed; | |
2368 | ||
2369 | dwc3_update_ram_clk_sel(dwc, speed); | |
2370 | ||
2371 | switch (speed) { | |
2372 | case DWC3_DCFG_SUPERSPEED: | |
05870c5b FB |
2373 | /* |
2374 | * WORKAROUND: DWC3 revisions <1.90a have an issue which | |
2375 | * would cause a missing USB3 Reset event. | |
2376 | * | |
2377 | * In such situations, we should force a USB3 Reset | |
2378 | * event by calling our dwc3_gadget_reset_interrupt() | |
2379 | * routine. | |
2380 | * | |
2381 | * Refers to: | |
2382 | * | |
2383 | * STAR#9000483510: RTL: SS : USB3 reset event may | |
2384 | * not be generated always when the link enters poll | |
2385 | */ | |
2386 | if (dwc->revision < DWC3_REVISION_190A) | |
2387 | dwc3_gadget_reset_interrupt(dwc); | |
2388 | ||
72246da4 FB |
2389 | dwc3_gadget_ep0_desc.wMaxPacketSize = cpu_to_le16(512); |
2390 | dwc->gadget.ep0->maxpacket = 512; | |
2391 | dwc->gadget.speed = USB_SPEED_SUPER; | |
2392 | break; | |
2393 | case DWC3_DCFG_HIGHSPEED: | |
2394 | dwc3_gadget_ep0_desc.wMaxPacketSize = cpu_to_le16(64); | |
2395 | dwc->gadget.ep0->maxpacket = 64; | |
2396 | dwc->gadget.speed = USB_SPEED_HIGH; | |
2397 | break; | |
2398 | case DWC3_DCFG_FULLSPEED2: | |
2399 | case DWC3_DCFG_FULLSPEED1: | |
2400 | dwc3_gadget_ep0_desc.wMaxPacketSize = cpu_to_le16(64); | |
2401 | dwc->gadget.ep0->maxpacket = 64; | |
2402 | dwc->gadget.speed = USB_SPEED_FULL; | |
2403 | break; | |
2404 | case DWC3_DCFG_LOWSPEED: | |
2405 | dwc3_gadget_ep0_desc.wMaxPacketSize = cpu_to_le16(8); | |
2406 | dwc->gadget.ep0->maxpacket = 8; | |
2407 | dwc->gadget.speed = USB_SPEED_LOW; | |
2408 | break; | |
2409 | } | |
2410 | ||
2b758350 PA |
2411 | /* Enable USB2 LPM Capability */ |
2412 | ||
2413 | if ((dwc->revision > DWC3_REVISION_194A) | |
2414 | && (speed != DWC3_DCFG_SUPERSPEED)) { | |
2415 | reg = dwc3_readl(dwc->regs, DWC3_DCFG); | |
2416 | reg |= DWC3_DCFG_LPM_CAP; | |
2417 | dwc3_writel(dwc->regs, DWC3_DCFG, reg); | |
2418 | ||
2419 | reg = dwc3_readl(dwc->regs, DWC3_DCTL); | |
2420 | reg &= ~(DWC3_DCTL_HIRD_THRES_MASK | DWC3_DCTL_L1_HIBER_EN); | |
2421 | ||
460d098c | 2422 | reg |= DWC3_DCTL_HIRD_THRES(dwc->hird_threshold); |
2b758350 | 2423 | |
80caf7d2 HR |
2424 | /* |
2425 | * When dwc3 revisions >= 2.40a, LPM Erratum is enabled and | |
2426 | * DCFG.LPMCap is set, core responses with an ACK and the | |
2427 | * BESL value in the LPM token is less than or equal to LPM | |
2428 | * NYET threshold. | |
2429 | */ | |
2430 | WARN_ONCE(dwc->revision < DWC3_REVISION_240A | |
2431 | && dwc->has_lpm_erratum, | |
2432 | "LPM Erratum not available on dwc3 revisisions < 2.40a\n"); | |
2433 | ||
2434 | if (dwc->has_lpm_erratum && dwc->revision >= DWC3_REVISION_240A) | |
2435 | reg |= DWC3_DCTL_LPM_ERRATA(dwc->lpm_nyet_threshold); | |
2436 | ||
356363bf FB |
2437 | dwc3_writel(dwc->regs, DWC3_DCTL, reg); |
2438 | } else { | |
2439 | reg = dwc3_readl(dwc->regs, DWC3_DCTL); | |
2440 | reg &= ~DWC3_DCTL_HIRD_THRES_MASK; | |
2b758350 PA |
2441 | dwc3_writel(dwc->regs, DWC3_DCTL, reg); |
2442 | } | |
2443 | ||
72246da4 | 2444 | dep = dwc->eps[0]; |
265b70a7 PZ |
2445 | ret = __dwc3_gadget_ep_enable(dep, &dwc3_gadget_ep0_desc, NULL, true, |
2446 | false); | |
72246da4 FB |
2447 | if (ret) { |
2448 | dev_err(dwc->dev, "failed to enable %s\n", dep->name); | |
2449 | return; | |
2450 | } | |
2451 | ||
2452 | dep = dwc->eps[1]; | |
265b70a7 PZ |
2453 | ret = __dwc3_gadget_ep_enable(dep, &dwc3_gadget_ep0_desc, NULL, true, |
2454 | false); | |
72246da4 FB |
2455 | if (ret) { |
2456 | dev_err(dwc->dev, "failed to enable %s\n", dep->name); | |
2457 | return; | |
2458 | } | |
2459 | ||
2460 | /* | |
2461 | * Configure PHY via GUSB3PIPECTLn if required. | |
2462 | * | |
2463 | * Update GTXFIFOSIZn | |
2464 | * | |
2465 | * In both cases reset values should be sufficient. | |
2466 | */ | |
2467 | } | |
2468 | ||
2469 | static void dwc3_gadget_wakeup_interrupt(struct dwc3 *dwc) | |
2470 | { | |
72246da4 FB |
2471 | /* |
2472 | * TODO take core out of low power mode when that's | |
2473 | * implemented. | |
2474 | */ | |
2475 | ||
2476 | dwc->gadget_driver->resume(&dwc->gadget); | |
2477 | } | |
2478 | ||
2479 | static void dwc3_gadget_linksts_change_interrupt(struct dwc3 *dwc, | |
2480 | unsigned int evtinfo) | |
2481 | { | |
fae2b904 | 2482 | enum dwc3_link_state next = evtinfo & DWC3_LINK_STATE_MASK; |
0b0cc1cd FB |
2483 | unsigned int pwropt; |
2484 | ||
2485 | /* | |
2486 | * WORKAROUND: DWC3 < 2.50a have an issue when configured without | |
2487 | * Hibernation mode enabled which would show up when device detects | |
2488 | * host-initiated U3 exit. | |
2489 | * | |
2490 | * In that case, device will generate a Link State Change Interrupt | |
2491 | * from U3 to RESUME which is only necessary if Hibernation is | |
2492 | * configured in. | |
2493 | * | |
2494 | * There are no functional changes due to such spurious event and we | |
2495 | * just need to ignore it. | |
2496 | * | |
2497 | * Refers to: | |
2498 | * | |
2499 | * STAR#9000570034 RTL: SS Resume event generated in non-Hibernation | |
2500 | * operational mode | |
2501 | */ | |
2502 | pwropt = DWC3_GHWPARAMS1_EN_PWROPT(dwc->hwparams.hwparams1); | |
2503 | if ((dwc->revision < DWC3_REVISION_250A) && | |
2504 | (pwropt != DWC3_GHWPARAMS1_EN_PWROPT_HIB)) { | |
2505 | if ((dwc->link_state == DWC3_LINK_STATE_U3) && | |
2506 | (next == DWC3_LINK_STATE_RESUME)) { | |
73815280 FB |
2507 | dwc3_trace(trace_dwc3_gadget, |
2508 | "ignoring transition U3 -> Resume"); | |
0b0cc1cd FB |
2509 | return; |
2510 | } | |
2511 | } | |
fae2b904 FB |
2512 | |
2513 | /* | |
2514 | * WORKAROUND: DWC3 Revisions <1.83a have an issue which, depending | |
2515 | * on the link partner, the USB session might do multiple entry/exit | |
2516 | * of low power states before a transfer takes place. | |
2517 | * | |
2518 | * Due to this problem, we might experience lower throughput. The | |
2519 | * suggested workaround is to disable DCTL[12:9] bits if we're | |
2520 | * transitioning from U1/U2 to U0 and enable those bits again | |
2521 | * after a transfer completes and there are no pending transfers | |
2522 | * on any of the enabled endpoints. | |
2523 | * | |
2524 | * This is the first half of that workaround. | |
2525 | * | |
2526 | * Refers to: | |
2527 | * | |
2528 | * STAR#9000446952: RTL: Device SS : if U1/U2 ->U0 takes >128us | |
2529 | * core send LGO_Ux entering U0 | |
2530 | */ | |
2531 | if (dwc->revision < DWC3_REVISION_183A) { | |
2532 | if (next == DWC3_LINK_STATE_U0) { | |
2533 | u32 u1u2; | |
2534 | u32 reg; | |
2535 | ||
2536 | switch (dwc->link_state) { | |
2537 | case DWC3_LINK_STATE_U1: | |
2538 | case DWC3_LINK_STATE_U2: | |
2539 | reg = dwc3_readl(dwc->regs, DWC3_DCTL); | |
2540 | u1u2 = reg & (DWC3_DCTL_INITU2ENA | |
2541 | | DWC3_DCTL_ACCEPTU2ENA | |
2542 | | DWC3_DCTL_INITU1ENA | |
2543 | | DWC3_DCTL_ACCEPTU1ENA); | |
2544 | ||
2545 | if (!dwc->u1u2) | |
2546 | dwc->u1u2 = reg & u1u2; | |
2547 | ||
2548 | reg &= ~u1u2; | |
2549 | ||
2550 | dwc3_writel(dwc->regs, DWC3_DCTL, reg); | |
2551 | break; | |
2552 | default: | |
2553 | /* do nothing */ | |
2554 | break; | |
2555 | } | |
2556 | } | |
2557 | } | |
2558 | ||
bc5ba2e0 FB |
2559 | switch (next) { |
2560 | case DWC3_LINK_STATE_U1: | |
2561 | if (dwc->speed == USB_SPEED_SUPER) | |
2562 | dwc3_suspend_gadget(dwc); | |
2563 | break; | |
2564 | case DWC3_LINK_STATE_U2: | |
2565 | case DWC3_LINK_STATE_U3: | |
2566 | dwc3_suspend_gadget(dwc); | |
2567 | break; | |
2568 | case DWC3_LINK_STATE_RESUME: | |
2569 | dwc3_resume_gadget(dwc); | |
2570 | break; | |
2571 | default: | |
2572 | /* do nothing */ | |
2573 | break; | |
2574 | } | |
2575 | ||
e57ebc1d | 2576 | dwc->link_state = next; |
72246da4 FB |
2577 | } |
2578 | ||
e1dadd3b FB |
2579 | static void dwc3_gadget_hibernation_interrupt(struct dwc3 *dwc, |
2580 | unsigned int evtinfo) | |
2581 | { | |
2582 | unsigned int is_ss = evtinfo & BIT(4); | |
2583 | ||
2584 | /** | |
2585 | * WORKAROUND: DWC3 revison 2.20a with hibernation support | |
2586 | * have a known issue which can cause USB CV TD.9.23 to fail | |
2587 | * randomly. | |
2588 | * | |
2589 | * Because of this issue, core could generate bogus hibernation | |
2590 | * events which SW needs to ignore. | |
2591 | * | |
2592 | * Refers to: | |
2593 | * | |
2594 | * STAR#9000546576: Device Mode Hibernation: Issue in USB 2.0 | |
2595 | * Device Fallback from SuperSpeed | |
2596 | */ | |
2597 | if (is_ss ^ (dwc->speed == USB_SPEED_SUPER)) | |
2598 | return; | |
2599 | ||
2600 | /* enter hibernation here */ | |
2601 | } | |
2602 | ||
72246da4 FB |
2603 | static void dwc3_gadget_interrupt(struct dwc3 *dwc, |
2604 | const struct dwc3_event_devt *event) | |
2605 | { | |
2606 | switch (event->type) { | |
2607 | case DWC3_DEVICE_EVENT_DISCONNECT: | |
2608 | dwc3_gadget_disconnect_interrupt(dwc); | |
2609 | break; | |
2610 | case DWC3_DEVICE_EVENT_RESET: | |
2611 | dwc3_gadget_reset_interrupt(dwc); | |
2612 | break; | |
2613 | case DWC3_DEVICE_EVENT_CONNECT_DONE: | |
2614 | dwc3_gadget_conndone_interrupt(dwc); | |
2615 | break; | |
2616 | case DWC3_DEVICE_EVENT_WAKEUP: | |
2617 | dwc3_gadget_wakeup_interrupt(dwc); | |
2618 | break; | |
e1dadd3b FB |
2619 | case DWC3_DEVICE_EVENT_HIBER_REQ: |
2620 | if (dev_WARN_ONCE(dwc->dev, !dwc->has_hibernation, | |
2621 | "unexpected hibernation event\n")) | |
2622 | break; | |
2623 | ||
2624 | dwc3_gadget_hibernation_interrupt(dwc, event->event_info); | |
2625 | break; | |
72246da4 FB |
2626 | case DWC3_DEVICE_EVENT_LINK_STATUS_CHANGE: |
2627 | dwc3_gadget_linksts_change_interrupt(dwc, event->event_info); | |
2628 | break; | |
2629 | case DWC3_DEVICE_EVENT_EOPF: | |
73815280 | 2630 | dwc3_trace(trace_dwc3_gadget, "End of Periodic Frame"); |
72246da4 FB |
2631 | break; |
2632 | case DWC3_DEVICE_EVENT_SOF: | |
73815280 | 2633 | dwc3_trace(trace_dwc3_gadget, "Start of Periodic Frame"); |
72246da4 FB |
2634 | break; |
2635 | case DWC3_DEVICE_EVENT_ERRATIC_ERROR: | |
73815280 | 2636 | dwc3_trace(trace_dwc3_gadget, "Erratic Error"); |
72246da4 FB |
2637 | break; |
2638 | case DWC3_DEVICE_EVENT_CMD_CMPL: | |
73815280 | 2639 | dwc3_trace(trace_dwc3_gadget, "Command Complete"); |
72246da4 FB |
2640 | break; |
2641 | case DWC3_DEVICE_EVENT_OVERFLOW: | |
73815280 | 2642 | dwc3_trace(trace_dwc3_gadget, "Overflow"); |
72246da4 FB |
2643 | break; |
2644 | default: | |
e9f2aa87 | 2645 | dev_WARN(dwc->dev, "UNKNOWN IRQ %d\n", event->type); |
72246da4 FB |
2646 | } |
2647 | } | |
2648 | ||
2649 | static void dwc3_process_event_entry(struct dwc3 *dwc, | |
2650 | const union dwc3_event *event) | |
2651 | { | |
2c4cbe6e FB |
2652 | trace_dwc3_event(event->raw); |
2653 | ||
72246da4 FB |
2654 | /* Endpoint IRQ, handle it and return early */ |
2655 | if (event->type.is_devspec == 0) { | |
2656 | /* depevt */ | |
2657 | return dwc3_endpoint_interrupt(dwc, &event->depevt); | |
2658 | } | |
2659 | ||
2660 | switch (event->type.type) { | |
2661 | case DWC3_EVENT_TYPE_DEV: | |
2662 | dwc3_gadget_interrupt(dwc, &event->devt); | |
2663 | break; | |
2664 | /* REVISIT what to do with Carkit and I2C events ? */ | |
2665 | default: | |
2666 | dev_err(dwc->dev, "UNKNOWN IRQ type %d\n", event->raw); | |
2667 | } | |
2668 | } | |
2669 | ||
f42f2447 | 2670 | static irqreturn_t dwc3_process_event_buf(struct dwc3 *dwc, u32 buf) |
b15a762f | 2671 | { |
f42f2447 | 2672 | struct dwc3_event_buffer *evt; |
b15a762f | 2673 | irqreturn_t ret = IRQ_NONE; |
f42f2447 | 2674 | int left; |
e8adfc30 | 2675 | u32 reg; |
b15a762f | 2676 | |
f42f2447 FB |
2677 | evt = dwc->ev_buffs[buf]; |
2678 | left = evt->count; | |
b15a762f | 2679 | |
f42f2447 FB |
2680 | if (!(evt->flags & DWC3_EVENT_PENDING)) |
2681 | return IRQ_NONE; | |
b15a762f | 2682 | |
f42f2447 FB |
2683 | while (left > 0) { |
2684 | union dwc3_event event; | |
b15a762f | 2685 | |
f42f2447 | 2686 | event.raw = *(u32 *) (evt->buf + evt->lpos); |
b15a762f | 2687 | |
f42f2447 | 2688 | dwc3_process_event_entry(dwc, &event); |
b15a762f | 2689 | |
f42f2447 FB |
2690 | /* |
2691 | * FIXME we wrap around correctly to the next entry as | |
2692 | * almost all entries are 4 bytes in size. There is one | |
2693 | * entry which has 12 bytes which is a regular entry | |
2694 | * followed by 8 bytes data. ATM I don't know how | |
2695 | * things are organized if we get next to the a | |
2696 | * boundary so I worry about that once we try to handle | |
2697 | * that. | |
2698 | */ | |
2699 | evt->lpos = (evt->lpos + 4) % DWC3_EVENT_BUFFERS_SIZE; | |
2700 | left -= 4; | |
b15a762f | 2701 | |
f42f2447 FB |
2702 | dwc3_writel(dwc->regs, DWC3_GEVNTCOUNT(buf), 4); |
2703 | } | |
b15a762f | 2704 | |
f42f2447 FB |
2705 | evt->count = 0; |
2706 | evt->flags &= ~DWC3_EVENT_PENDING; | |
2707 | ret = IRQ_HANDLED; | |
b15a762f | 2708 | |
f42f2447 FB |
2709 | /* Unmask interrupt */ |
2710 | reg = dwc3_readl(dwc->regs, DWC3_GEVNTSIZ(buf)); | |
2711 | reg &= ~DWC3_GEVNTSIZ_INTMASK; | |
2712 | dwc3_writel(dwc->regs, DWC3_GEVNTSIZ(buf), reg); | |
b15a762f | 2713 | |
f42f2447 FB |
2714 | return ret; |
2715 | } | |
e8adfc30 | 2716 | |
f42f2447 FB |
2717 | static irqreturn_t dwc3_thread_interrupt(int irq, void *_dwc) |
2718 | { | |
2719 | struct dwc3 *dwc = _dwc; | |
e5f68b4a | 2720 | unsigned long flags; |
f42f2447 FB |
2721 | irqreturn_t ret = IRQ_NONE; |
2722 | int i; | |
2723 | ||
e5f68b4a | 2724 | spin_lock_irqsave(&dwc->lock, flags); |
f42f2447 FB |
2725 | |
2726 | for (i = 0; i < dwc->num_event_buffers; i++) | |
2727 | ret |= dwc3_process_event_buf(dwc, i); | |
b15a762f | 2728 | |
e5f68b4a | 2729 | spin_unlock_irqrestore(&dwc->lock, flags); |
b15a762f FB |
2730 | |
2731 | return ret; | |
2732 | } | |
2733 | ||
7f97aa98 | 2734 | static irqreturn_t dwc3_check_event_buf(struct dwc3 *dwc, u32 buf) |
72246da4 FB |
2735 | { |
2736 | struct dwc3_event_buffer *evt; | |
72246da4 | 2737 | u32 count; |
e8adfc30 | 2738 | u32 reg; |
72246da4 | 2739 | |
b15a762f FB |
2740 | evt = dwc->ev_buffs[buf]; |
2741 | ||
72246da4 FB |
2742 | count = dwc3_readl(dwc->regs, DWC3_GEVNTCOUNT(buf)); |
2743 | count &= DWC3_GEVNTCOUNT_MASK; | |
2744 | if (!count) | |
2745 | return IRQ_NONE; | |
2746 | ||
b15a762f FB |
2747 | evt->count = count; |
2748 | evt->flags |= DWC3_EVENT_PENDING; | |
72246da4 | 2749 | |
e8adfc30 FB |
2750 | /* Mask interrupt */ |
2751 | reg = dwc3_readl(dwc->regs, DWC3_GEVNTSIZ(buf)); | |
2752 | reg |= DWC3_GEVNTSIZ_INTMASK; | |
2753 | dwc3_writel(dwc->regs, DWC3_GEVNTSIZ(buf), reg); | |
2754 | ||
b15a762f | 2755 | return IRQ_WAKE_THREAD; |
72246da4 FB |
2756 | } |
2757 | ||
2758 | static irqreturn_t dwc3_interrupt(int irq, void *_dwc) | |
2759 | { | |
2760 | struct dwc3 *dwc = _dwc; | |
2761 | int i; | |
2762 | irqreturn_t ret = IRQ_NONE; | |
2763 | ||
9f622b2a | 2764 | for (i = 0; i < dwc->num_event_buffers; i++) { |
72246da4 FB |
2765 | irqreturn_t status; |
2766 | ||
7f97aa98 | 2767 | status = dwc3_check_event_buf(dwc, i); |
b15a762f | 2768 | if (status == IRQ_WAKE_THREAD) |
72246da4 FB |
2769 | ret = status; |
2770 | } | |
2771 | ||
72246da4 FB |
2772 | return ret; |
2773 | } | |
2774 | ||
2775 | /** | |
2776 | * dwc3_gadget_init - Initializes gadget related registers | |
1d046793 | 2777 | * @dwc: pointer to our controller context structure |
72246da4 FB |
2778 | * |
2779 | * Returns 0 on success otherwise negative errno. | |
2780 | */ | |
41ac7b3a | 2781 | int dwc3_gadget_init(struct dwc3 *dwc) |
72246da4 | 2782 | { |
72246da4 | 2783 | int ret; |
72246da4 FB |
2784 | |
2785 | dwc->ctrl_req = dma_alloc_coherent(dwc->dev, sizeof(*dwc->ctrl_req), | |
2786 | &dwc->ctrl_req_addr, GFP_KERNEL); | |
2787 | if (!dwc->ctrl_req) { | |
2788 | dev_err(dwc->dev, "failed to allocate ctrl request\n"); | |
2789 | ret = -ENOMEM; | |
2790 | goto err0; | |
2791 | } | |
2792 | ||
2abd9d5f | 2793 | dwc->ep0_trb = dma_alloc_coherent(dwc->dev, sizeof(*dwc->ep0_trb) * 2, |
72246da4 FB |
2794 | &dwc->ep0_trb_addr, GFP_KERNEL); |
2795 | if (!dwc->ep0_trb) { | |
2796 | dev_err(dwc->dev, "failed to allocate ep0 trb\n"); | |
2797 | ret = -ENOMEM; | |
2798 | goto err1; | |
2799 | } | |
2800 | ||
3ef35faf | 2801 | dwc->setup_buf = kzalloc(DWC3_EP0_BOUNCE_SIZE, GFP_KERNEL); |
72246da4 | 2802 | if (!dwc->setup_buf) { |
72246da4 FB |
2803 | ret = -ENOMEM; |
2804 | goto err2; | |
2805 | } | |
2806 | ||
5812b1c2 | 2807 | dwc->ep0_bounce = dma_alloc_coherent(dwc->dev, |
3ef35faf FB |
2808 | DWC3_EP0_BOUNCE_SIZE, &dwc->ep0_bounce_addr, |
2809 | GFP_KERNEL); | |
5812b1c2 FB |
2810 | if (!dwc->ep0_bounce) { |
2811 | dev_err(dwc->dev, "failed to allocate ep0 bounce buffer\n"); | |
2812 | ret = -ENOMEM; | |
2813 | goto err3; | |
2814 | } | |
2815 | ||
04c03d10 FB |
2816 | dwc->zlp_buf = kzalloc(DWC3_ZLP_BUF_SIZE, GFP_KERNEL); |
2817 | if (!dwc->zlp_buf) { | |
2818 | ret = -ENOMEM; | |
2819 | goto err4; | |
2820 | } | |
2821 | ||
72246da4 | 2822 | dwc->gadget.ops = &dwc3_gadget_ops; |
72246da4 | 2823 | dwc->gadget.speed = USB_SPEED_UNKNOWN; |
eeb720fb | 2824 | dwc->gadget.sg_supported = true; |
72246da4 | 2825 | dwc->gadget.name = "dwc3-gadget"; |
6a4290cc | 2826 | dwc->gadget.is_otg = dwc->dr_mode == USB_DR_MODE_OTG; |
72246da4 | 2827 | |
b9e51b2b BM |
2828 | /* |
2829 | * FIXME We might be setting max_speed to <SUPER, however versions | |
2830 | * <2.20a of dwc3 have an issue with metastability (documented | |
2831 | * elsewhere in this driver) which tells us we can't set max speed to | |
2832 | * anything lower than SUPER. | |
2833 | * | |
2834 | * Because gadget.max_speed is only used by composite.c and function | |
2835 | * drivers (i.e. it won't go into dwc3's registers) we are allowing this | |
2836 | * to happen so we avoid sending SuperSpeed Capability descriptor | |
2837 | * together with our BOS descriptor as that could confuse host into | |
2838 | * thinking we can handle super speed. | |
2839 | * | |
2840 | * Note that, in fact, we won't even support GetBOS requests when speed | |
2841 | * is less than super speed because we don't have means, yet, to tell | |
2842 | * composite.c that we are USB 2.0 + LPM ECN. | |
2843 | */ | |
2844 | if (dwc->revision < DWC3_REVISION_220A) | |
2845 | dwc3_trace(trace_dwc3_gadget, | |
2846 | "Changing max_speed on rev %08x\n", | |
2847 | dwc->revision); | |
2848 | ||
2849 | dwc->gadget.max_speed = dwc->maximum_speed; | |
2850 | ||
a4b9d94b DC |
2851 | /* |
2852 | * Per databook, DWC3 needs buffer size to be aligned to MaxPacketSize | |
2853 | * on ep out. | |
2854 | */ | |
2855 | dwc->gadget.quirk_ep_out_aligned_size = true; | |
2856 | ||
72246da4 FB |
2857 | /* |
2858 | * REVISIT: Here we should clear all pending IRQs to be | |
2859 | * sure we're starting from a well known location. | |
2860 | */ | |
2861 | ||
2862 | ret = dwc3_gadget_init_endpoints(dwc); | |
2863 | if (ret) | |
04c03d10 | 2864 | goto err5; |
72246da4 | 2865 | |
72246da4 FB |
2866 | ret = usb_add_gadget_udc(dwc->dev, &dwc->gadget); |
2867 | if (ret) { | |
2868 | dev_err(dwc->dev, "failed to register udc\n"); | |
04c03d10 | 2869 | goto err5; |
72246da4 FB |
2870 | } |
2871 | ||
2872 | return 0; | |
2873 | ||
04c03d10 FB |
2874 | err5: |
2875 | kfree(dwc->zlp_buf); | |
2876 | ||
5812b1c2 | 2877 | err4: |
e1f80467 | 2878 | dwc3_gadget_free_endpoints(dwc); |
3ef35faf FB |
2879 | dma_free_coherent(dwc->dev, DWC3_EP0_BOUNCE_SIZE, |
2880 | dwc->ep0_bounce, dwc->ep0_bounce_addr); | |
5812b1c2 | 2881 | |
72246da4 | 2882 | err3: |
0fc9a1be | 2883 | kfree(dwc->setup_buf); |
72246da4 FB |
2884 | |
2885 | err2: | |
2886 | dma_free_coherent(dwc->dev, sizeof(*dwc->ep0_trb), | |
2887 | dwc->ep0_trb, dwc->ep0_trb_addr); | |
2888 | ||
2889 | err1: | |
2890 | dma_free_coherent(dwc->dev, sizeof(*dwc->ctrl_req), | |
2891 | dwc->ctrl_req, dwc->ctrl_req_addr); | |
2892 | ||
2893 | err0: | |
2894 | return ret; | |
2895 | } | |
2896 | ||
7415f17c FB |
2897 | /* -------------------------------------------------------------------------- */ |
2898 | ||
72246da4 FB |
2899 | void dwc3_gadget_exit(struct dwc3 *dwc) |
2900 | { | |
72246da4 | 2901 | usb_del_gadget_udc(&dwc->gadget); |
72246da4 | 2902 | |
72246da4 FB |
2903 | dwc3_gadget_free_endpoints(dwc); |
2904 | ||
3ef35faf FB |
2905 | dma_free_coherent(dwc->dev, DWC3_EP0_BOUNCE_SIZE, |
2906 | dwc->ep0_bounce, dwc->ep0_bounce_addr); | |
5812b1c2 | 2907 | |
0fc9a1be | 2908 | kfree(dwc->setup_buf); |
04c03d10 | 2909 | kfree(dwc->zlp_buf); |
72246da4 FB |
2910 | |
2911 | dma_free_coherent(dwc->dev, sizeof(*dwc->ep0_trb), | |
2912 | dwc->ep0_trb, dwc->ep0_trb_addr); | |
2913 | ||
2914 | dma_free_coherent(dwc->dev, sizeof(*dwc->ctrl_req), | |
2915 | dwc->ctrl_req, dwc->ctrl_req_addr); | |
72246da4 | 2916 | } |
7415f17c | 2917 | |
0b0231aa | 2918 | int dwc3_gadget_suspend(struct dwc3 *dwc) |
7415f17c | 2919 | { |
7b2a0368 | 2920 | if (dwc->pullups_connected) { |
7415f17c | 2921 | dwc3_gadget_disable_irq(dwc); |
7b2a0368 FB |
2922 | dwc3_gadget_run_stop(dwc, true, true); |
2923 | } | |
7415f17c | 2924 | |
7415f17c FB |
2925 | __dwc3_gadget_ep_disable(dwc->eps[0]); |
2926 | __dwc3_gadget_ep_disable(dwc->eps[1]); | |
2927 | ||
2928 | dwc->dcfg = dwc3_readl(dwc->regs, DWC3_DCFG); | |
2929 | ||
2930 | return 0; | |
2931 | } | |
2932 | ||
2933 | int dwc3_gadget_resume(struct dwc3 *dwc) | |
2934 | { | |
2935 | struct dwc3_ep *dep; | |
2936 | int ret; | |
2937 | ||
2938 | /* Start with SuperSpeed Default */ | |
2939 | dwc3_gadget_ep0_desc.wMaxPacketSize = cpu_to_le16(512); | |
2940 | ||
2941 | dep = dwc->eps[0]; | |
265b70a7 PZ |
2942 | ret = __dwc3_gadget_ep_enable(dep, &dwc3_gadget_ep0_desc, NULL, false, |
2943 | false); | |
7415f17c FB |
2944 | if (ret) |
2945 | goto err0; | |
2946 | ||
2947 | dep = dwc->eps[1]; | |
265b70a7 PZ |
2948 | ret = __dwc3_gadget_ep_enable(dep, &dwc3_gadget_ep0_desc, NULL, false, |
2949 | false); | |
7415f17c FB |
2950 | if (ret) |
2951 | goto err1; | |
2952 | ||
2953 | /* begin to receive SETUP packets */ | |
2954 | dwc->ep0state = EP0_SETUP_PHASE; | |
2955 | dwc3_ep0_out_start(dwc); | |
2956 | ||
2957 | dwc3_writel(dwc->regs, DWC3_DCFG, dwc->dcfg); | |
2958 | ||
0b0231aa FB |
2959 | if (dwc->pullups_connected) { |
2960 | dwc3_gadget_enable_irq(dwc); | |
2961 | dwc3_gadget_run_stop(dwc, true, false); | |
2962 | } | |
2963 | ||
7415f17c FB |
2964 | return 0; |
2965 | ||
2966 | err1: | |
2967 | __dwc3_gadget_ep_disable(dwc->eps[0]); | |
2968 | ||
2969 | err0: | |
2970 | return ret; | |
2971 | } |