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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 | * | |
9 | * Redistribution and use in source and binary forms, with or without | |
10 | * modification, are permitted provided that the following conditions | |
11 | * are met: | |
12 | * 1. Redistributions of source code must retain the above copyright | |
13 | * notice, this list of conditions, and the following disclaimer, | |
14 | * without modification. | |
15 | * 2. Redistributions in binary form must reproduce the above copyright | |
16 | * notice, this list of conditions and the following disclaimer in the | |
17 | * documentation and/or other materials provided with the distribution. | |
18 | * 3. The names of the above-listed copyright holders may not be used | |
19 | * to endorse or promote products derived from this software without | |
20 | * specific prior written permission. | |
21 | * | |
22 | * ALTERNATIVELY, this software may be distributed under the terms of the | |
23 | * GNU General Public License ("GPL") version 2, as published by the Free | |
24 | * Software Foundation. | |
25 | * | |
26 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS | |
27 | * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, | |
28 | * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR | |
29 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR | |
30 | * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, | |
31 | * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, | |
32 | * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR | |
33 | * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF | |
34 | * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING | |
35 | * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS | |
36 | * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
37 | */ | |
38 | ||
39 | #include <linux/kernel.h> | |
40 | #include <linux/delay.h> | |
41 | #include <linux/slab.h> | |
42 | #include <linux/spinlock.h> | |
43 | #include <linux/platform_device.h> | |
44 | #include <linux/pm_runtime.h> | |
45 | #include <linux/interrupt.h> | |
46 | #include <linux/io.h> | |
47 | #include <linux/list.h> | |
48 | #include <linux/dma-mapping.h> | |
49 | ||
50 | #include <linux/usb/ch9.h> | |
51 | #include <linux/usb/gadget.h> | |
52 | ||
53 | #include "core.h" | |
54 | #include "gadget.h" | |
55 | #include "io.h" | |
56 | ||
04a9bfcd FB |
57 | /** |
58 | * dwc3_gadget_set_test_mode - Enables USB2 Test Modes | |
59 | * @dwc: pointer to our context structure | |
60 | * @mode: the mode to set (J, K SE0 NAK, Force Enable) | |
61 | * | |
62 | * Caller should take care of locking. This function will | |
63 | * return 0 on success or -EINVAL if wrong Test Selector | |
64 | * is passed | |
65 | */ | |
66 | int dwc3_gadget_set_test_mode(struct dwc3 *dwc, int mode) | |
67 | { | |
68 | u32 reg; | |
69 | ||
70 | reg = dwc3_readl(dwc->regs, DWC3_DCTL); | |
71 | reg &= ~DWC3_DCTL_TSTCTRL_MASK; | |
72 | ||
73 | switch (mode) { | |
74 | case TEST_J: | |
75 | case TEST_K: | |
76 | case TEST_SE0_NAK: | |
77 | case TEST_PACKET: | |
78 | case TEST_FORCE_EN: | |
79 | reg |= mode << 1; | |
80 | break; | |
81 | default: | |
82 | return -EINVAL; | |
83 | } | |
84 | ||
85 | dwc3_writel(dwc->regs, DWC3_DCTL, reg); | |
86 | ||
87 | return 0; | |
88 | } | |
89 | ||
8598bde7 FB |
90 | /** |
91 | * dwc3_gadget_set_link_state - Sets USB Link to a particular State | |
92 | * @dwc: pointer to our context structure | |
93 | * @state: the state to put link into | |
94 | * | |
95 | * Caller should take care of locking. This function will | |
aee63e3c | 96 | * return 0 on success or -ETIMEDOUT. |
8598bde7 FB |
97 | */ |
98 | int dwc3_gadget_set_link_state(struct dwc3 *dwc, enum dwc3_link_state state) | |
99 | { | |
aee63e3c | 100 | int retries = 10000; |
8598bde7 FB |
101 | u32 reg; |
102 | ||
802fde98 PZ |
103 | /* |
104 | * Wait until device controller is ready. Only applies to 1.94a and | |
105 | * later RTL. | |
106 | */ | |
107 | if (dwc->revision >= DWC3_REVISION_194A) { | |
108 | while (--retries) { | |
109 | reg = dwc3_readl(dwc->regs, DWC3_DSTS); | |
110 | if (reg & DWC3_DSTS_DCNRD) | |
111 | udelay(5); | |
112 | else | |
113 | break; | |
114 | } | |
115 | ||
116 | if (retries <= 0) | |
117 | return -ETIMEDOUT; | |
118 | } | |
119 | ||
8598bde7 FB |
120 | reg = dwc3_readl(dwc->regs, DWC3_DCTL); |
121 | reg &= ~DWC3_DCTL_ULSTCHNGREQ_MASK; | |
122 | ||
123 | /* set requested state */ | |
124 | reg |= DWC3_DCTL_ULSTCHNGREQ(state); | |
125 | dwc3_writel(dwc->regs, DWC3_DCTL, reg); | |
126 | ||
802fde98 PZ |
127 | /* |
128 | * The following code is racy when called from dwc3_gadget_wakeup, | |
129 | * and is not needed, at least on newer versions | |
130 | */ | |
131 | if (dwc->revision >= DWC3_REVISION_194A) | |
132 | return 0; | |
133 | ||
8598bde7 | 134 | /* wait for a change in DSTS */ |
aed430e5 | 135 | retries = 10000; |
8598bde7 FB |
136 | while (--retries) { |
137 | reg = dwc3_readl(dwc->regs, DWC3_DSTS); | |
138 | ||
8598bde7 FB |
139 | if (DWC3_DSTS_USBLNKST(reg) == state) |
140 | return 0; | |
141 | ||
aee63e3c | 142 | udelay(5); |
8598bde7 FB |
143 | } |
144 | ||
145 | dev_vdbg(dwc->dev, "link state change request timed out\n"); | |
146 | ||
147 | return -ETIMEDOUT; | |
148 | } | |
149 | ||
457e84b6 FB |
150 | /** |
151 | * dwc3_gadget_resize_tx_fifos - reallocate fifo spaces for current use-case | |
152 | * @dwc: pointer to our context structure | |
153 | * | |
154 | * This function will a best effort FIFO allocation in order | |
155 | * to improve FIFO usage and throughput, while still allowing | |
156 | * us to enable as many endpoints as possible. | |
157 | * | |
158 | * Keep in mind that this operation will be highly dependent | |
159 | * on the configured size for RAM1 - which contains TxFifo -, | |
160 | * the amount of endpoints enabled on coreConsultant tool, and | |
161 | * the width of the Master Bus. | |
162 | * | |
163 | * In the ideal world, we would always be able to satisfy the | |
164 | * following equation: | |
165 | * | |
166 | * ((512 + 2 * MDWIDTH-Bytes) + (Number of IN Endpoints - 1) * \ | |
167 | * (3 * (1024 + MDWIDTH-Bytes) + MDWIDTH-Bytes)) / MDWIDTH-Bytes | |
168 | * | |
169 | * Unfortunately, due to many variables that's not always the case. | |
170 | */ | |
171 | int dwc3_gadget_resize_tx_fifos(struct dwc3 *dwc) | |
172 | { | |
173 | int last_fifo_depth = 0; | |
174 | int ram1_depth; | |
175 | int fifo_size; | |
176 | int mdwidth; | |
177 | int num; | |
178 | ||
179 | if (!dwc->needs_fifo_resize) | |
180 | return 0; | |
181 | ||
182 | ram1_depth = DWC3_RAM1_DEPTH(dwc->hwparams.hwparams7); | |
183 | mdwidth = DWC3_MDWIDTH(dwc->hwparams.hwparams0); | |
184 | ||
185 | /* MDWIDTH is represented in bits, we need it in bytes */ | |
186 | mdwidth >>= 3; | |
187 | ||
188 | /* | |
189 | * FIXME For now we will only allocate 1 wMaxPacketSize space | |
190 | * for each enabled endpoint, later patches will come to | |
191 | * improve this algorithm so that we better use the internal | |
192 | * FIFO space | |
193 | */ | |
194 | for (num = 0; num < DWC3_ENDPOINTS_NUM; num++) { | |
195 | struct dwc3_ep *dep = dwc->eps[num]; | |
196 | int fifo_number = dep->number >> 1; | |
2e81c36a | 197 | int mult = 1; |
457e84b6 FB |
198 | int tmp; |
199 | ||
200 | if (!(dep->number & 1)) | |
201 | continue; | |
202 | ||
203 | if (!(dep->flags & DWC3_EP_ENABLED)) | |
204 | continue; | |
205 | ||
16e78db7 IS |
206 | if (usb_endpoint_xfer_bulk(dep->endpoint.desc) |
207 | || usb_endpoint_xfer_isoc(dep->endpoint.desc)) | |
2e81c36a FB |
208 | mult = 3; |
209 | ||
210 | /* | |
211 | * REVISIT: the following assumes we will always have enough | |
212 | * space available on the FIFO RAM for all possible use cases. | |
213 | * Make sure that's true somehow and change FIFO allocation | |
214 | * accordingly. | |
215 | * | |
216 | * If we have Bulk or Isochronous endpoints, we want | |
217 | * them to be able to be very, very fast. So we're giving | |
218 | * those endpoints a fifo_size which is enough for 3 full | |
219 | * packets | |
220 | */ | |
221 | tmp = mult * (dep->endpoint.maxpacket + mdwidth); | |
457e84b6 FB |
222 | tmp += mdwidth; |
223 | ||
224 | fifo_size = DIV_ROUND_UP(tmp, mdwidth); | |
2e81c36a | 225 | |
457e84b6 FB |
226 | fifo_size |= (last_fifo_depth << 16); |
227 | ||
228 | dev_vdbg(dwc->dev, "%s: Fifo Addr %04x Size %d\n", | |
229 | dep->name, last_fifo_depth, fifo_size & 0xffff); | |
230 | ||
231 | dwc3_writel(dwc->regs, DWC3_GTXFIFOSIZ(fifo_number), | |
232 | fifo_size); | |
233 | ||
234 | last_fifo_depth += (fifo_size & 0xffff); | |
235 | } | |
236 | ||
237 | return 0; | |
238 | } | |
239 | ||
72246da4 FB |
240 | void dwc3_gadget_giveback(struct dwc3_ep *dep, struct dwc3_request *req, |
241 | int status) | |
242 | { | |
243 | struct dwc3 *dwc = dep->dwc; | |
244 | ||
245 | if (req->queued) { | |
eeb720fb FB |
246 | if (req->request.num_mapped_sgs) |
247 | dep->busy_slot += req->request.num_mapped_sgs; | |
248 | else | |
249 | dep->busy_slot++; | |
250 | ||
72246da4 FB |
251 | /* |
252 | * Skip LINK TRB. We can't use req->trb and check for | |
253 | * DWC3_TRBCTL_LINK_TRB because it points the TRB we just | |
254 | * completed (not the LINK TRB). | |
255 | */ | |
256 | if (((dep->busy_slot & DWC3_TRB_MASK) == DWC3_TRB_NUM - 1) && | |
16e78db7 | 257 | usb_endpoint_xfer_isoc(dep->endpoint.desc)) |
72246da4 FB |
258 | dep->busy_slot++; |
259 | } | |
260 | list_del(&req->list); | |
eeb720fb | 261 | req->trb = NULL; |
72246da4 FB |
262 | |
263 | if (req->request.status == -EINPROGRESS) | |
264 | req->request.status = status; | |
265 | ||
0fc9a1be FB |
266 | usb_gadget_unmap_request(&dwc->gadget, &req->request, |
267 | req->direction); | |
72246da4 FB |
268 | |
269 | dev_dbg(dwc->dev, "request %p from %s completed %d/%d ===> %d\n", | |
270 | req, dep->name, req->request.actual, | |
271 | req->request.length, status); | |
272 | ||
273 | spin_unlock(&dwc->lock); | |
0fc9a1be | 274 | req->request.complete(&dep->endpoint, &req->request); |
72246da4 FB |
275 | spin_lock(&dwc->lock); |
276 | } | |
277 | ||
278 | static const char *dwc3_gadget_ep_cmd_string(u8 cmd) | |
279 | { | |
280 | switch (cmd) { | |
281 | case DWC3_DEPCMD_DEPSTARTCFG: | |
282 | return "Start New Configuration"; | |
283 | case DWC3_DEPCMD_ENDTRANSFER: | |
284 | return "End Transfer"; | |
285 | case DWC3_DEPCMD_UPDATETRANSFER: | |
286 | return "Update Transfer"; | |
287 | case DWC3_DEPCMD_STARTTRANSFER: | |
288 | return "Start Transfer"; | |
289 | case DWC3_DEPCMD_CLEARSTALL: | |
290 | return "Clear Stall"; | |
291 | case DWC3_DEPCMD_SETSTALL: | |
292 | return "Set Stall"; | |
802fde98 PZ |
293 | case DWC3_DEPCMD_GETEPSTATE: |
294 | return "Get Endpoint State"; | |
72246da4 FB |
295 | case DWC3_DEPCMD_SETTRANSFRESOURCE: |
296 | return "Set Endpoint Transfer Resource"; | |
297 | case DWC3_DEPCMD_SETEPCONFIG: | |
298 | return "Set Endpoint Configuration"; | |
299 | default: | |
300 | return "UNKNOWN command"; | |
301 | } | |
302 | } | |
303 | ||
b09bb642 FB |
304 | int dwc3_send_gadget_generic_command(struct dwc3 *dwc, int cmd, u32 param) |
305 | { | |
306 | u32 timeout = 500; | |
307 | u32 reg; | |
308 | ||
309 | dwc3_writel(dwc->regs, DWC3_DGCMDPAR, param); | |
310 | dwc3_writel(dwc->regs, DWC3_DGCMD, cmd | DWC3_DGCMD_CMDACT); | |
311 | ||
312 | do { | |
313 | reg = dwc3_readl(dwc->regs, DWC3_DGCMD); | |
314 | if (!(reg & DWC3_DGCMD_CMDACT)) { | |
315 | dev_vdbg(dwc->dev, "Command Complete --> %d\n", | |
316 | DWC3_DGCMD_STATUS(reg)); | |
317 | return 0; | |
318 | } | |
319 | ||
320 | /* | |
321 | * We can't sleep here, because it's also called from | |
322 | * interrupt context. | |
323 | */ | |
324 | timeout--; | |
325 | if (!timeout) | |
326 | return -ETIMEDOUT; | |
327 | udelay(1); | |
328 | } while (1); | |
329 | } | |
330 | ||
72246da4 FB |
331 | int dwc3_send_gadget_ep_cmd(struct dwc3 *dwc, unsigned ep, |
332 | unsigned cmd, struct dwc3_gadget_ep_cmd_params *params) | |
333 | { | |
334 | struct dwc3_ep *dep = dwc->eps[ep]; | |
61d58242 | 335 | u32 timeout = 500; |
72246da4 FB |
336 | u32 reg; |
337 | ||
338 | dev_vdbg(dwc->dev, "%s: cmd '%s' params %08x %08x %08x\n", | |
339 | dep->name, | |
dc1c70a7 FB |
340 | dwc3_gadget_ep_cmd_string(cmd), params->param0, |
341 | params->param1, params->param2); | |
72246da4 | 342 | |
dc1c70a7 FB |
343 | dwc3_writel(dwc->regs, DWC3_DEPCMDPAR0(ep), params->param0); |
344 | dwc3_writel(dwc->regs, DWC3_DEPCMDPAR1(ep), params->param1); | |
345 | dwc3_writel(dwc->regs, DWC3_DEPCMDPAR2(ep), params->param2); | |
72246da4 FB |
346 | |
347 | dwc3_writel(dwc->regs, DWC3_DEPCMD(ep), cmd | DWC3_DEPCMD_CMDACT); | |
348 | do { | |
349 | reg = dwc3_readl(dwc->regs, DWC3_DEPCMD(ep)); | |
350 | if (!(reg & DWC3_DEPCMD_CMDACT)) { | |
164f6e14 FB |
351 | dev_vdbg(dwc->dev, "Command Complete --> %d\n", |
352 | DWC3_DEPCMD_STATUS(reg)); | |
72246da4 FB |
353 | return 0; |
354 | } | |
355 | ||
356 | /* | |
72246da4 FB |
357 | * We can't sleep here, because it is also called from |
358 | * interrupt context. | |
359 | */ | |
360 | timeout--; | |
361 | if (!timeout) | |
362 | return -ETIMEDOUT; | |
363 | ||
61d58242 | 364 | udelay(1); |
72246da4 FB |
365 | } while (1); |
366 | } | |
367 | ||
368 | static dma_addr_t dwc3_trb_dma_offset(struct dwc3_ep *dep, | |
f6bafc6a | 369 | struct dwc3_trb *trb) |
72246da4 | 370 | { |
c439ef87 | 371 | u32 offset = (char *) trb - (char *) dep->trb_pool; |
72246da4 FB |
372 | |
373 | return dep->trb_pool_dma + offset; | |
374 | } | |
375 | ||
376 | static int dwc3_alloc_trb_pool(struct dwc3_ep *dep) | |
377 | { | |
378 | struct dwc3 *dwc = dep->dwc; | |
379 | ||
380 | if (dep->trb_pool) | |
381 | return 0; | |
382 | ||
383 | if (dep->number == 0 || dep->number == 1) | |
384 | return 0; | |
385 | ||
386 | dep->trb_pool = dma_alloc_coherent(dwc->dev, | |
387 | sizeof(struct dwc3_trb) * DWC3_TRB_NUM, | |
388 | &dep->trb_pool_dma, GFP_KERNEL); | |
389 | if (!dep->trb_pool) { | |
390 | dev_err(dep->dwc->dev, "failed to allocate trb pool for %s\n", | |
391 | dep->name); | |
392 | return -ENOMEM; | |
393 | } | |
394 | ||
395 | return 0; | |
396 | } | |
397 | ||
398 | static void dwc3_free_trb_pool(struct dwc3_ep *dep) | |
399 | { | |
400 | struct dwc3 *dwc = dep->dwc; | |
401 | ||
402 | dma_free_coherent(dwc->dev, sizeof(struct dwc3_trb) * DWC3_TRB_NUM, | |
403 | dep->trb_pool, dep->trb_pool_dma); | |
404 | ||
405 | dep->trb_pool = NULL; | |
406 | dep->trb_pool_dma = 0; | |
407 | } | |
408 | ||
409 | static int dwc3_gadget_start_config(struct dwc3 *dwc, struct dwc3_ep *dep) | |
410 | { | |
411 | struct dwc3_gadget_ep_cmd_params params; | |
412 | u32 cmd; | |
413 | ||
414 | memset(¶ms, 0x00, sizeof(params)); | |
415 | ||
416 | if (dep->number != 1) { | |
417 | cmd = DWC3_DEPCMD_DEPSTARTCFG; | |
418 | /* XferRscIdx == 0 for ep0 and 2 for the remaining */ | |
b23c8439 PZ |
419 | if (dep->number > 1) { |
420 | if (dwc->start_config_issued) | |
421 | return 0; | |
422 | dwc->start_config_issued = true; | |
72246da4 | 423 | cmd |= DWC3_DEPCMD_PARAM(2); |
b23c8439 | 424 | } |
72246da4 FB |
425 | |
426 | return dwc3_send_gadget_ep_cmd(dwc, 0, cmd, ¶ms); | |
427 | } | |
428 | ||
429 | return 0; | |
430 | } | |
431 | ||
432 | static int dwc3_gadget_set_ep_config(struct dwc3 *dwc, struct dwc3_ep *dep, | |
c90bfaec | 433 | const struct usb_endpoint_descriptor *desc, |
4b345c9a FB |
434 | const struct usb_ss_ep_comp_descriptor *comp_desc, |
435 | bool ignore) | |
72246da4 FB |
436 | { |
437 | struct dwc3_gadget_ep_cmd_params params; | |
438 | ||
439 | memset(¶ms, 0x00, sizeof(params)); | |
440 | ||
dc1c70a7 FB |
441 | params.param0 = DWC3_DEPCFG_EP_TYPE(usb_endpoint_type(desc)) |
442 | | DWC3_DEPCFG_MAX_PACKET_SIZE(usb_endpoint_maxp(desc)) | |
b785ea7c | 443 | | DWC3_DEPCFG_BURST_SIZE(dep->endpoint.maxburst - 1); |
72246da4 | 444 | |
4b345c9a FB |
445 | if (ignore) |
446 | params.param0 |= DWC3_DEPCFG_IGN_SEQ_NUM; | |
447 | ||
dc1c70a7 FB |
448 | params.param1 = DWC3_DEPCFG_XFER_COMPLETE_EN |
449 | | DWC3_DEPCFG_XFER_NOT_READY_EN; | |
72246da4 | 450 | |
18b7ede5 | 451 | if (usb_ss_max_streams(comp_desc) && usb_endpoint_xfer_bulk(desc)) { |
dc1c70a7 FB |
452 | params.param1 |= DWC3_DEPCFG_STREAM_CAPABLE |
453 | | DWC3_DEPCFG_STREAM_EVENT_EN; | |
879631aa FB |
454 | dep->stream_capable = true; |
455 | } | |
456 | ||
72246da4 | 457 | if (usb_endpoint_xfer_isoc(desc)) |
dc1c70a7 | 458 | params.param1 |= DWC3_DEPCFG_XFER_IN_PROGRESS_EN; |
72246da4 FB |
459 | |
460 | /* | |
461 | * We are doing 1:1 mapping for endpoints, meaning | |
462 | * Physical Endpoints 2 maps to Logical Endpoint 2 and | |
463 | * so on. We consider the direction bit as part of the physical | |
464 | * endpoint number. So USB endpoint 0x81 is 0x03. | |
465 | */ | |
dc1c70a7 | 466 | params.param1 |= DWC3_DEPCFG_EP_NUMBER(dep->number); |
72246da4 FB |
467 | |
468 | /* | |
469 | * We must use the lower 16 TX FIFOs even though | |
470 | * HW might have more | |
471 | */ | |
472 | if (dep->direction) | |
dc1c70a7 | 473 | params.param0 |= DWC3_DEPCFG_FIFO_NUMBER(dep->number >> 1); |
72246da4 FB |
474 | |
475 | if (desc->bInterval) { | |
dc1c70a7 | 476 | params.param1 |= DWC3_DEPCFG_BINTERVAL_M1(desc->bInterval - 1); |
72246da4 FB |
477 | dep->interval = 1 << (desc->bInterval - 1); |
478 | } | |
479 | ||
480 | return dwc3_send_gadget_ep_cmd(dwc, dep->number, | |
481 | DWC3_DEPCMD_SETEPCONFIG, ¶ms); | |
482 | } | |
483 | ||
484 | static int dwc3_gadget_set_xfer_resource(struct dwc3 *dwc, struct dwc3_ep *dep) | |
485 | { | |
486 | struct dwc3_gadget_ep_cmd_params params; | |
487 | ||
488 | memset(¶ms, 0x00, sizeof(params)); | |
489 | ||
dc1c70a7 | 490 | params.param0 = DWC3_DEPXFERCFG_NUM_XFER_RES(1); |
72246da4 FB |
491 | |
492 | return dwc3_send_gadget_ep_cmd(dwc, dep->number, | |
493 | DWC3_DEPCMD_SETTRANSFRESOURCE, ¶ms); | |
494 | } | |
495 | ||
496 | /** | |
497 | * __dwc3_gadget_ep_enable - Initializes a HW endpoint | |
498 | * @dep: endpoint to be initialized | |
499 | * @desc: USB Endpoint Descriptor | |
500 | * | |
501 | * Caller should take care of locking | |
502 | */ | |
503 | static int __dwc3_gadget_ep_enable(struct dwc3_ep *dep, | |
c90bfaec | 504 | const struct usb_endpoint_descriptor *desc, |
4b345c9a FB |
505 | const struct usb_ss_ep_comp_descriptor *comp_desc, |
506 | bool ignore) | |
72246da4 FB |
507 | { |
508 | struct dwc3 *dwc = dep->dwc; | |
509 | u32 reg; | |
510 | int ret = -ENOMEM; | |
511 | ||
512 | if (!(dep->flags & DWC3_EP_ENABLED)) { | |
513 | ret = dwc3_gadget_start_config(dwc, dep); | |
514 | if (ret) | |
515 | return ret; | |
516 | } | |
517 | ||
4b345c9a | 518 | ret = dwc3_gadget_set_ep_config(dwc, dep, desc, comp_desc, ignore); |
72246da4 FB |
519 | if (ret) |
520 | return ret; | |
521 | ||
522 | if (!(dep->flags & DWC3_EP_ENABLED)) { | |
f6bafc6a FB |
523 | struct dwc3_trb *trb_st_hw; |
524 | struct dwc3_trb *trb_link; | |
72246da4 FB |
525 | |
526 | ret = dwc3_gadget_set_xfer_resource(dwc, dep); | |
527 | if (ret) | |
528 | return ret; | |
529 | ||
16e78db7 | 530 | dep->endpoint.desc = desc; |
c90bfaec | 531 | dep->comp_desc = comp_desc; |
72246da4 FB |
532 | dep->type = usb_endpoint_type(desc); |
533 | dep->flags |= DWC3_EP_ENABLED; | |
534 | ||
535 | reg = dwc3_readl(dwc->regs, DWC3_DALEPENA); | |
536 | reg |= DWC3_DALEPENA_EP(dep->number); | |
537 | dwc3_writel(dwc->regs, DWC3_DALEPENA, reg); | |
538 | ||
539 | if (!usb_endpoint_xfer_isoc(desc)) | |
540 | return 0; | |
541 | ||
542 | memset(&trb_link, 0, sizeof(trb_link)); | |
543 | ||
1d046793 | 544 | /* Link TRB for ISOC. The HWO bit is never reset */ |
72246da4 FB |
545 | trb_st_hw = &dep->trb_pool[0]; |
546 | ||
f6bafc6a | 547 | trb_link = &dep->trb_pool[DWC3_TRB_NUM - 1]; |
72246da4 | 548 | |
f6bafc6a FB |
549 | trb_link->bpl = lower_32_bits(dwc3_trb_dma_offset(dep, trb_st_hw)); |
550 | trb_link->bph = upper_32_bits(dwc3_trb_dma_offset(dep, trb_st_hw)); | |
551 | trb_link->ctrl |= DWC3_TRBCTL_LINK_TRB; | |
552 | trb_link->ctrl |= DWC3_TRB_CTRL_HWO; | |
72246da4 FB |
553 | } |
554 | ||
555 | return 0; | |
556 | } | |
557 | ||
624407f9 SAS |
558 | static void dwc3_stop_active_transfer(struct dwc3 *dwc, u32 epnum); |
559 | static void dwc3_remove_requests(struct dwc3 *dwc, struct dwc3_ep *dep) | |
72246da4 FB |
560 | { |
561 | struct dwc3_request *req; | |
562 | ||
ea53b882 | 563 | if (!list_empty(&dep->req_queued)) { |
624407f9 SAS |
564 | dwc3_stop_active_transfer(dwc, dep->number); |
565 | ||
57911504 | 566 | /* - giveback all requests to gadget driver */ |
1591633e PA |
567 | while (!list_empty(&dep->req_queued)) { |
568 | req = next_request(&dep->req_queued); | |
569 | ||
570 | dwc3_gadget_giveback(dep, req, -ESHUTDOWN); | |
571 | } | |
ea53b882 FB |
572 | } |
573 | ||
72246da4 FB |
574 | while (!list_empty(&dep->request_list)) { |
575 | req = next_request(&dep->request_list); | |
576 | ||
624407f9 | 577 | dwc3_gadget_giveback(dep, req, -ESHUTDOWN); |
72246da4 | 578 | } |
72246da4 FB |
579 | } |
580 | ||
581 | /** | |
582 | * __dwc3_gadget_ep_disable - Disables a HW endpoint | |
583 | * @dep: the endpoint to disable | |
584 | * | |
624407f9 SAS |
585 | * This function also removes requests which are currently processed ny the |
586 | * hardware and those which are not yet scheduled. | |
587 | * Caller should take care of locking. | |
72246da4 | 588 | */ |
72246da4 FB |
589 | static int __dwc3_gadget_ep_disable(struct dwc3_ep *dep) |
590 | { | |
591 | struct dwc3 *dwc = dep->dwc; | |
592 | u32 reg; | |
593 | ||
624407f9 | 594 | dwc3_remove_requests(dwc, dep); |
72246da4 FB |
595 | |
596 | reg = dwc3_readl(dwc->regs, DWC3_DALEPENA); | |
597 | reg &= ~DWC3_DALEPENA_EP(dep->number); | |
598 | dwc3_writel(dwc->regs, DWC3_DALEPENA, reg); | |
599 | ||
879631aa | 600 | dep->stream_capable = false; |
f9c56cdd | 601 | dep->endpoint.desc = NULL; |
c90bfaec | 602 | dep->comp_desc = NULL; |
72246da4 | 603 | dep->type = 0; |
879631aa | 604 | dep->flags = 0; |
72246da4 FB |
605 | |
606 | return 0; | |
607 | } | |
608 | ||
609 | /* -------------------------------------------------------------------------- */ | |
610 | ||
611 | static int dwc3_gadget_ep0_enable(struct usb_ep *ep, | |
612 | const struct usb_endpoint_descriptor *desc) | |
613 | { | |
614 | return -EINVAL; | |
615 | } | |
616 | ||
617 | static int dwc3_gadget_ep0_disable(struct usb_ep *ep) | |
618 | { | |
619 | return -EINVAL; | |
620 | } | |
621 | ||
622 | /* -------------------------------------------------------------------------- */ | |
623 | ||
624 | static int dwc3_gadget_ep_enable(struct usb_ep *ep, | |
625 | const struct usb_endpoint_descriptor *desc) | |
626 | { | |
627 | struct dwc3_ep *dep; | |
628 | struct dwc3 *dwc; | |
629 | unsigned long flags; | |
630 | int ret; | |
631 | ||
632 | if (!ep || !desc || desc->bDescriptorType != USB_DT_ENDPOINT) { | |
633 | pr_debug("dwc3: invalid parameters\n"); | |
634 | return -EINVAL; | |
635 | } | |
636 | ||
637 | if (!desc->wMaxPacketSize) { | |
638 | pr_debug("dwc3: missing wMaxPacketSize\n"); | |
639 | return -EINVAL; | |
640 | } | |
641 | ||
642 | dep = to_dwc3_ep(ep); | |
643 | dwc = dep->dwc; | |
644 | ||
645 | switch (usb_endpoint_type(desc)) { | |
646 | case USB_ENDPOINT_XFER_CONTROL: | |
27a78d6a | 647 | strlcat(dep->name, "-control", sizeof(dep->name)); |
72246da4 FB |
648 | break; |
649 | case USB_ENDPOINT_XFER_ISOC: | |
27a78d6a | 650 | strlcat(dep->name, "-isoc", sizeof(dep->name)); |
72246da4 FB |
651 | break; |
652 | case USB_ENDPOINT_XFER_BULK: | |
27a78d6a | 653 | strlcat(dep->name, "-bulk", sizeof(dep->name)); |
72246da4 FB |
654 | break; |
655 | case USB_ENDPOINT_XFER_INT: | |
27a78d6a | 656 | strlcat(dep->name, "-int", sizeof(dep->name)); |
72246da4 FB |
657 | break; |
658 | default: | |
659 | dev_err(dwc->dev, "invalid endpoint transfer type\n"); | |
660 | } | |
661 | ||
662 | if (dep->flags & DWC3_EP_ENABLED) { | |
663 | dev_WARN_ONCE(dwc->dev, true, "%s is already enabled\n", | |
664 | dep->name); | |
665 | return 0; | |
666 | } | |
667 | ||
668 | dev_vdbg(dwc->dev, "Enabling %s\n", dep->name); | |
669 | ||
670 | spin_lock_irqsave(&dwc->lock, flags); | |
4b345c9a | 671 | ret = __dwc3_gadget_ep_enable(dep, desc, ep->comp_desc, false); |
72246da4 FB |
672 | spin_unlock_irqrestore(&dwc->lock, flags); |
673 | ||
674 | return ret; | |
675 | } | |
676 | ||
677 | static int dwc3_gadget_ep_disable(struct usb_ep *ep) | |
678 | { | |
679 | struct dwc3_ep *dep; | |
680 | struct dwc3 *dwc; | |
681 | unsigned long flags; | |
682 | int ret; | |
683 | ||
684 | if (!ep) { | |
685 | pr_debug("dwc3: invalid parameters\n"); | |
686 | return -EINVAL; | |
687 | } | |
688 | ||
689 | dep = to_dwc3_ep(ep); | |
690 | dwc = dep->dwc; | |
691 | ||
692 | if (!(dep->flags & DWC3_EP_ENABLED)) { | |
693 | dev_WARN_ONCE(dwc->dev, true, "%s is already disabled\n", | |
694 | dep->name); | |
695 | return 0; | |
696 | } | |
697 | ||
698 | snprintf(dep->name, sizeof(dep->name), "ep%d%s", | |
699 | dep->number >> 1, | |
700 | (dep->number & 1) ? "in" : "out"); | |
701 | ||
702 | spin_lock_irqsave(&dwc->lock, flags); | |
703 | ret = __dwc3_gadget_ep_disable(dep); | |
704 | spin_unlock_irqrestore(&dwc->lock, flags); | |
705 | ||
706 | return ret; | |
707 | } | |
708 | ||
709 | static struct usb_request *dwc3_gadget_ep_alloc_request(struct usb_ep *ep, | |
710 | gfp_t gfp_flags) | |
711 | { | |
712 | struct dwc3_request *req; | |
713 | struct dwc3_ep *dep = to_dwc3_ep(ep); | |
714 | struct dwc3 *dwc = dep->dwc; | |
715 | ||
716 | req = kzalloc(sizeof(*req), gfp_flags); | |
717 | if (!req) { | |
718 | dev_err(dwc->dev, "not enough memory\n"); | |
719 | return NULL; | |
720 | } | |
721 | ||
722 | req->epnum = dep->number; | |
723 | req->dep = dep; | |
72246da4 FB |
724 | |
725 | return &req->request; | |
726 | } | |
727 | ||
728 | static void dwc3_gadget_ep_free_request(struct usb_ep *ep, | |
729 | struct usb_request *request) | |
730 | { | |
731 | struct dwc3_request *req = to_dwc3_request(request); | |
732 | ||
733 | kfree(req); | |
734 | } | |
735 | ||
c71fc37c FB |
736 | /** |
737 | * dwc3_prepare_one_trb - setup one TRB from one request | |
738 | * @dep: endpoint for which this request is prepared | |
739 | * @req: dwc3_request pointer | |
740 | */ | |
68e823e2 | 741 | static void dwc3_prepare_one_trb(struct dwc3_ep *dep, |
eeb720fb FB |
742 | struct dwc3_request *req, dma_addr_t dma, |
743 | unsigned length, unsigned last, unsigned chain) | |
c71fc37c | 744 | { |
eeb720fb | 745 | struct dwc3 *dwc = dep->dwc; |
f6bafc6a | 746 | struct dwc3_trb *trb; |
c71fc37c FB |
747 | |
748 | unsigned int cur_slot; | |
749 | ||
eeb720fb FB |
750 | dev_vdbg(dwc->dev, "%s: req %p dma %08llx length %d%s%s\n", |
751 | dep->name, req, (unsigned long long) dma, | |
752 | length, last ? " last" : "", | |
753 | chain ? " chain" : ""); | |
754 | ||
f6bafc6a | 755 | trb = &dep->trb_pool[dep->free_slot & DWC3_TRB_MASK]; |
c71fc37c FB |
756 | cur_slot = dep->free_slot; |
757 | dep->free_slot++; | |
758 | ||
759 | /* Skip the LINK-TRB on ISOC */ | |
760 | if (((cur_slot & DWC3_TRB_MASK) == DWC3_TRB_NUM - 1) && | |
16e78db7 | 761 | usb_endpoint_xfer_isoc(dep->endpoint.desc)) |
68e823e2 | 762 | return; |
c71fc37c | 763 | |
eeb720fb FB |
764 | if (!req->trb) { |
765 | dwc3_gadget_move_request_queued(req); | |
f6bafc6a FB |
766 | req->trb = trb; |
767 | req->trb_dma = dwc3_trb_dma_offset(dep, trb); | |
eeb720fb | 768 | } |
c71fc37c | 769 | |
f6bafc6a FB |
770 | trb->size = DWC3_TRB_SIZE_LENGTH(length); |
771 | trb->bpl = lower_32_bits(dma); | |
772 | trb->bph = upper_32_bits(dma); | |
c71fc37c | 773 | |
16e78db7 | 774 | switch (usb_endpoint_type(dep->endpoint.desc)) { |
c71fc37c | 775 | case USB_ENDPOINT_XFER_CONTROL: |
f6bafc6a | 776 | trb->ctrl = DWC3_TRBCTL_CONTROL_SETUP; |
c71fc37c FB |
777 | break; |
778 | ||
779 | case USB_ENDPOINT_XFER_ISOC: | |
f6bafc6a | 780 | trb->ctrl = DWC3_TRBCTL_ISOCHRONOUS_FIRST; |
c71fc37c | 781 | |
206dd69a | 782 | if (!req->request.no_interrupt) |
f6bafc6a | 783 | trb->ctrl |= DWC3_TRB_CTRL_IOC; |
c71fc37c FB |
784 | break; |
785 | ||
786 | case USB_ENDPOINT_XFER_BULK: | |
787 | case USB_ENDPOINT_XFER_INT: | |
f6bafc6a | 788 | trb->ctrl = DWC3_TRBCTL_NORMAL; |
c71fc37c FB |
789 | break; |
790 | default: | |
791 | /* | |
792 | * This is only possible with faulty memory because we | |
793 | * checked it already :) | |
794 | */ | |
795 | BUG(); | |
796 | } | |
797 | ||
16e78db7 | 798 | if (usb_endpoint_xfer_isoc(dep->endpoint.desc)) { |
f6bafc6a FB |
799 | trb->ctrl |= DWC3_TRB_CTRL_ISP_IMI; |
800 | trb->ctrl |= DWC3_TRB_CTRL_CSP; | |
801 | } else { | |
802 | if (chain) | |
803 | trb->ctrl |= DWC3_TRB_CTRL_CHN; | |
804 | ||
805 | if (last) | |
806 | trb->ctrl |= DWC3_TRB_CTRL_LST; | |
807 | } | |
c71fc37c | 808 | |
16e78db7 | 809 | if (usb_endpoint_xfer_bulk(dep->endpoint.desc) && dep->stream_capable) |
f6bafc6a | 810 | trb->ctrl |= DWC3_TRB_CTRL_SID_SOFN(req->request.stream_id); |
c71fc37c | 811 | |
f6bafc6a | 812 | trb->ctrl |= DWC3_TRB_CTRL_HWO; |
c71fc37c FB |
813 | } |
814 | ||
72246da4 FB |
815 | /* |
816 | * dwc3_prepare_trbs - setup TRBs from requests | |
817 | * @dep: endpoint for which requests are being prepared | |
818 | * @starting: true if the endpoint is idle and no requests are queued. | |
819 | * | |
1d046793 PZ |
820 | * The function goes through the requests list and sets up TRBs for the |
821 | * transfers. The function returns once there are no more TRBs available or | |
822 | * it runs out of requests. | |
72246da4 | 823 | */ |
68e823e2 | 824 | static void dwc3_prepare_trbs(struct dwc3_ep *dep, bool starting) |
72246da4 | 825 | { |
68e823e2 | 826 | struct dwc3_request *req, *n; |
72246da4 | 827 | u32 trbs_left; |
8d62cd65 | 828 | u32 max; |
c71fc37c | 829 | unsigned int last_one = 0; |
72246da4 FB |
830 | |
831 | BUILD_BUG_ON_NOT_POWER_OF_2(DWC3_TRB_NUM); | |
832 | ||
833 | /* the first request must not be queued */ | |
834 | trbs_left = (dep->busy_slot - dep->free_slot) & DWC3_TRB_MASK; | |
c71fc37c | 835 | |
8d62cd65 | 836 | /* Can't wrap around on a non-isoc EP since there's no link TRB */ |
16e78db7 | 837 | if (!usb_endpoint_xfer_isoc(dep->endpoint.desc)) { |
8d62cd65 PZ |
838 | max = DWC3_TRB_NUM - (dep->free_slot & DWC3_TRB_MASK); |
839 | if (trbs_left > max) | |
840 | trbs_left = max; | |
841 | } | |
842 | ||
72246da4 | 843 | /* |
1d046793 PZ |
844 | * If busy & slot are equal than it is either full or empty. If we are |
845 | * starting to process requests then we are empty. Otherwise we are | |
72246da4 FB |
846 | * full and don't do anything |
847 | */ | |
848 | if (!trbs_left) { | |
849 | if (!starting) | |
68e823e2 | 850 | return; |
72246da4 FB |
851 | trbs_left = DWC3_TRB_NUM; |
852 | /* | |
853 | * In case we start from scratch, we queue the ISOC requests | |
854 | * starting from slot 1. This is done because we use ring | |
855 | * buffer and have no LST bit to stop us. Instead, we place | |
1d046793 | 856 | * IOC bit every TRB_NUM/4. We try to avoid having an interrupt |
72246da4 FB |
857 | * after the first request so we start at slot 1 and have |
858 | * 7 requests proceed before we hit the first IOC. | |
859 | * Other transfer types don't use the ring buffer and are | |
860 | * processed from the first TRB until the last one. Since we | |
861 | * don't wrap around we have to start at the beginning. | |
862 | */ | |
16e78db7 | 863 | if (usb_endpoint_xfer_isoc(dep->endpoint.desc)) { |
72246da4 FB |
864 | dep->busy_slot = 1; |
865 | dep->free_slot = 1; | |
866 | } else { | |
867 | dep->busy_slot = 0; | |
868 | dep->free_slot = 0; | |
869 | } | |
870 | } | |
871 | ||
872 | /* The last TRB is a link TRB, not used for xfer */ | |
16e78db7 | 873 | if ((trbs_left <= 1) && usb_endpoint_xfer_isoc(dep->endpoint.desc)) |
68e823e2 | 874 | return; |
72246da4 FB |
875 | |
876 | list_for_each_entry_safe(req, n, &dep->request_list, list) { | |
eeb720fb FB |
877 | unsigned length; |
878 | dma_addr_t dma; | |
72246da4 | 879 | |
eeb720fb FB |
880 | if (req->request.num_mapped_sgs > 0) { |
881 | struct usb_request *request = &req->request; | |
882 | struct scatterlist *sg = request->sg; | |
883 | struct scatterlist *s; | |
884 | int i; | |
72246da4 | 885 | |
eeb720fb FB |
886 | for_each_sg(sg, s, request->num_mapped_sgs, i) { |
887 | unsigned chain = true; | |
72246da4 | 888 | |
eeb720fb FB |
889 | length = sg_dma_len(s); |
890 | dma = sg_dma_address(s); | |
72246da4 | 891 | |
1d046793 PZ |
892 | if (i == (request->num_mapped_sgs - 1) || |
893 | sg_is_last(s)) { | |
eeb720fb FB |
894 | last_one = true; |
895 | chain = false; | |
896 | } | |
72246da4 | 897 | |
eeb720fb FB |
898 | trbs_left--; |
899 | if (!trbs_left) | |
900 | last_one = true; | |
72246da4 | 901 | |
eeb720fb FB |
902 | if (last_one) |
903 | chain = false; | |
72246da4 | 904 | |
eeb720fb FB |
905 | dwc3_prepare_one_trb(dep, req, dma, length, |
906 | last_one, chain); | |
72246da4 | 907 | |
eeb720fb FB |
908 | if (last_one) |
909 | break; | |
910 | } | |
72246da4 | 911 | } else { |
eeb720fb FB |
912 | dma = req->request.dma; |
913 | length = req->request.length; | |
914 | trbs_left--; | |
72246da4 | 915 | |
eeb720fb FB |
916 | if (!trbs_left) |
917 | last_one = 1; | |
879631aa | 918 | |
eeb720fb FB |
919 | /* Is this the last request? */ |
920 | if (list_is_last(&req->list, &dep->request_list)) | |
921 | last_one = 1; | |
72246da4 | 922 | |
eeb720fb FB |
923 | dwc3_prepare_one_trb(dep, req, dma, length, |
924 | last_one, false); | |
72246da4 | 925 | |
eeb720fb FB |
926 | if (last_one) |
927 | break; | |
72246da4 | 928 | } |
72246da4 | 929 | } |
72246da4 FB |
930 | } |
931 | ||
932 | static int __dwc3_gadget_kick_transfer(struct dwc3_ep *dep, u16 cmd_param, | |
933 | int start_new) | |
934 | { | |
935 | struct dwc3_gadget_ep_cmd_params params; | |
936 | struct dwc3_request *req; | |
937 | struct dwc3 *dwc = dep->dwc; | |
938 | int ret; | |
939 | u32 cmd; | |
940 | ||
941 | if (start_new && (dep->flags & DWC3_EP_BUSY)) { | |
942 | dev_vdbg(dwc->dev, "%s: endpoint busy\n", dep->name); | |
943 | return -EBUSY; | |
944 | } | |
945 | dep->flags &= ~DWC3_EP_PENDING_REQUEST; | |
946 | ||
947 | /* | |
948 | * If we are getting here after a short-out-packet we don't enqueue any | |
949 | * new requests as we try to set the IOC bit only on the last request. | |
950 | */ | |
951 | if (start_new) { | |
952 | if (list_empty(&dep->req_queued)) | |
953 | dwc3_prepare_trbs(dep, start_new); | |
954 | ||
955 | /* req points to the first request which will be sent */ | |
956 | req = next_request(&dep->req_queued); | |
957 | } else { | |
68e823e2 FB |
958 | dwc3_prepare_trbs(dep, start_new); |
959 | ||
72246da4 | 960 | /* |
1d046793 | 961 | * req points to the first request where HWO changed from 0 to 1 |
72246da4 | 962 | */ |
68e823e2 | 963 | req = next_request(&dep->req_queued); |
72246da4 FB |
964 | } |
965 | if (!req) { | |
966 | dep->flags |= DWC3_EP_PENDING_REQUEST; | |
967 | return 0; | |
968 | } | |
969 | ||
970 | memset(¶ms, 0, sizeof(params)); | |
dc1c70a7 FB |
971 | params.param0 = upper_32_bits(req->trb_dma); |
972 | params.param1 = lower_32_bits(req->trb_dma); | |
72246da4 FB |
973 | |
974 | if (start_new) | |
975 | cmd = DWC3_DEPCMD_STARTTRANSFER; | |
976 | else | |
977 | cmd = DWC3_DEPCMD_UPDATETRANSFER; | |
978 | ||
979 | cmd |= DWC3_DEPCMD_PARAM(cmd_param); | |
980 | ret = dwc3_send_gadget_ep_cmd(dwc, dep->number, cmd, ¶ms); | |
981 | if (ret < 0) { | |
982 | dev_dbg(dwc->dev, "failed to send STARTTRANSFER command\n"); | |
983 | ||
984 | /* | |
985 | * FIXME we need to iterate over the list of requests | |
986 | * here and stop, unmap, free and del each of the linked | |
1d046793 | 987 | * requests instead of what we do now. |
72246da4 | 988 | */ |
0fc9a1be FB |
989 | usb_gadget_unmap_request(&dwc->gadget, &req->request, |
990 | req->direction); | |
72246da4 FB |
991 | list_del(&req->list); |
992 | return ret; | |
993 | } | |
994 | ||
995 | dep->flags |= DWC3_EP_BUSY; | |
25b8ff68 | 996 | |
f898ae09 | 997 | if (start_new) { |
b4996a86 | 998 | dep->resource_index = dwc3_gadget_ep_get_transfer_index(dwc, |
f898ae09 | 999 | dep->number); |
b4996a86 | 1000 | WARN_ON_ONCE(!dep->resource_index); |
f898ae09 | 1001 | } |
25b8ff68 | 1002 | |
72246da4 FB |
1003 | return 0; |
1004 | } | |
1005 | ||
d6d6ec7b PA |
1006 | static void __dwc3_gadget_start_isoc(struct dwc3 *dwc, |
1007 | struct dwc3_ep *dep, u32 cur_uf) | |
1008 | { | |
1009 | u32 uf; | |
1010 | ||
1011 | if (list_empty(&dep->request_list)) { | |
1012 | dev_vdbg(dwc->dev, "ISOC ep %s run out for requests.\n", | |
1013 | dep->name); | |
1014 | return; | |
1015 | } | |
1016 | ||
1017 | /* 4 micro frames in the future */ | |
1018 | uf = cur_uf + dep->interval * 4; | |
1019 | ||
1020 | __dwc3_gadget_kick_transfer(dep, uf, 1); | |
1021 | } | |
1022 | ||
1023 | static void dwc3_gadget_start_isoc(struct dwc3 *dwc, | |
1024 | struct dwc3_ep *dep, const struct dwc3_event_depevt *event) | |
1025 | { | |
1026 | u32 cur_uf, mask; | |
1027 | ||
1028 | mask = ~(dep->interval - 1); | |
1029 | cur_uf = event->parameters & mask; | |
1030 | ||
1031 | __dwc3_gadget_start_isoc(dwc, dep, cur_uf); | |
1032 | } | |
1033 | ||
72246da4 FB |
1034 | static int __dwc3_gadget_ep_queue(struct dwc3_ep *dep, struct dwc3_request *req) |
1035 | { | |
0fc9a1be FB |
1036 | struct dwc3 *dwc = dep->dwc; |
1037 | int ret; | |
1038 | ||
72246da4 FB |
1039 | req->request.actual = 0; |
1040 | req->request.status = -EINPROGRESS; | |
1041 | req->direction = dep->direction; | |
1042 | req->epnum = dep->number; | |
1043 | ||
1044 | /* | |
1045 | * We only add to our list of requests now and | |
1046 | * start consuming the list once we get XferNotReady | |
1047 | * IRQ. | |
1048 | * | |
1049 | * That way, we avoid doing anything that we don't need | |
1050 | * to do now and defer it until the point we receive a | |
1051 | * particular token from the Host side. | |
1052 | * | |
1053 | * This will also avoid Host cancelling URBs due to too | |
1d046793 | 1054 | * many NAKs. |
72246da4 | 1055 | */ |
0fc9a1be FB |
1056 | ret = usb_gadget_map_request(&dwc->gadget, &req->request, |
1057 | dep->direction); | |
1058 | if (ret) | |
1059 | return ret; | |
1060 | ||
72246da4 FB |
1061 | list_add_tail(&req->list, &dep->request_list); |
1062 | ||
1063 | /* | |
b511e5e7 | 1064 | * There are a few special cases: |
72246da4 | 1065 | * |
f898ae09 PZ |
1066 | * 1. XferNotReady with empty list of requests. We need to kick the |
1067 | * transfer here in that situation, otherwise we will be NAKing | |
1068 | * forever. If we get XferNotReady before gadget driver has a | |
1069 | * chance to queue a request, we will ACK the IRQ but won't be | |
1070 | * able to receive the data until the next request is queued. | |
1071 | * The following code is handling exactly that. | |
72246da4 | 1072 | * |
72246da4 FB |
1073 | */ |
1074 | if (dep->flags & DWC3_EP_PENDING_REQUEST) { | |
b511e5e7 | 1075 | ret = __dwc3_gadget_kick_transfer(dep, 0, true); |
348e026f | 1076 | if (ret && ret != -EBUSY) |
b511e5e7 FB |
1077 | dev_dbg(dwc->dev, "%s: failed to kick transfers\n", |
1078 | dep->name); | |
b511e5e7 | 1079 | } |
72246da4 | 1080 | |
b511e5e7 FB |
1081 | /* |
1082 | * 2. XferInProgress on Isoc EP with an active transfer. We need to | |
1083 | * kick the transfer here after queuing a request, otherwise the | |
1084 | * core may not see the modified TRB(s). | |
1085 | */ | |
1086 | if (usb_endpoint_xfer_isoc(dep->endpoint.desc) && | |
79c9046e PA |
1087 | (dep->flags & DWC3_EP_BUSY) && |
1088 | !(dep->flags & DWC3_EP_MISSED_ISOC)) { | |
b4996a86 FB |
1089 | WARN_ON_ONCE(!dep->resource_index); |
1090 | ret = __dwc3_gadget_kick_transfer(dep, dep->resource_index, | |
b511e5e7 | 1091 | false); |
348e026f | 1092 | if (ret && ret != -EBUSY) |
72246da4 FB |
1093 | dev_dbg(dwc->dev, "%s: failed to kick transfers\n", |
1094 | dep->name); | |
a0925324 | 1095 | } |
72246da4 | 1096 | |
b511e5e7 FB |
1097 | /* |
1098 | * 3. Missed ISOC Handling. We need to start isoc transfer on the saved | |
1099 | * uframe number. | |
1100 | */ | |
1101 | if (usb_endpoint_xfer_isoc(dep->endpoint.desc) && | |
1102 | (dep->flags & DWC3_EP_MISSED_ISOC)) { | |
1103 | __dwc3_gadget_start_isoc(dwc, dep, dep->current_uf); | |
1104 | dep->flags &= ~DWC3_EP_MISSED_ISOC; | |
1105 | } | |
72246da4 FB |
1106 | |
1107 | return 0; | |
1108 | } | |
1109 | ||
1110 | static int dwc3_gadget_ep_queue(struct usb_ep *ep, struct usb_request *request, | |
1111 | gfp_t gfp_flags) | |
1112 | { | |
1113 | struct dwc3_request *req = to_dwc3_request(request); | |
1114 | struct dwc3_ep *dep = to_dwc3_ep(ep); | |
1115 | struct dwc3 *dwc = dep->dwc; | |
1116 | ||
1117 | unsigned long flags; | |
1118 | ||
1119 | int ret; | |
1120 | ||
16e78db7 | 1121 | if (!dep->endpoint.desc) { |
72246da4 FB |
1122 | dev_dbg(dwc->dev, "trying to queue request %p to disabled %s\n", |
1123 | request, ep->name); | |
1124 | return -ESHUTDOWN; | |
1125 | } | |
1126 | ||
1127 | dev_vdbg(dwc->dev, "queing request %p to %s length %d\n", | |
1128 | request, ep->name, request->length); | |
1129 | ||
1130 | spin_lock_irqsave(&dwc->lock, flags); | |
1131 | ret = __dwc3_gadget_ep_queue(dep, req); | |
1132 | spin_unlock_irqrestore(&dwc->lock, flags); | |
1133 | ||
1134 | return ret; | |
1135 | } | |
1136 | ||
1137 | static int dwc3_gadget_ep_dequeue(struct usb_ep *ep, | |
1138 | struct usb_request *request) | |
1139 | { | |
1140 | struct dwc3_request *req = to_dwc3_request(request); | |
1141 | struct dwc3_request *r = NULL; | |
1142 | ||
1143 | struct dwc3_ep *dep = to_dwc3_ep(ep); | |
1144 | struct dwc3 *dwc = dep->dwc; | |
1145 | ||
1146 | unsigned long flags; | |
1147 | int ret = 0; | |
1148 | ||
1149 | spin_lock_irqsave(&dwc->lock, flags); | |
1150 | ||
1151 | list_for_each_entry(r, &dep->request_list, list) { | |
1152 | if (r == req) | |
1153 | break; | |
1154 | } | |
1155 | ||
1156 | if (r != req) { | |
1157 | list_for_each_entry(r, &dep->req_queued, list) { | |
1158 | if (r == req) | |
1159 | break; | |
1160 | } | |
1161 | if (r == req) { | |
1162 | /* wait until it is processed */ | |
1163 | dwc3_stop_active_transfer(dwc, dep->number); | |
e8d4e8be | 1164 | goto out1; |
72246da4 FB |
1165 | } |
1166 | dev_err(dwc->dev, "request %p was not queued to %s\n", | |
1167 | request, ep->name); | |
1168 | ret = -EINVAL; | |
1169 | goto out0; | |
1170 | } | |
1171 | ||
e8d4e8be | 1172 | out1: |
72246da4 FB |
1173 | /* giveback the request */ |
1174 | dwc3_gadget_giveback(dep, req, -ECONNRESET); | |
1175 | ||
1176 | out0: | |
1177 | spin_unlock_irqrestore(&dwc->lock, flags); | |
1178 | ||
1179 | return ret; | |
1180 | } | |
1181 | ||
1182 | int __dwc3_gadget_ep_set_halt(struct dwc3_ep *dep, int value) | |
1183 | { | |
1184 | struct dwc3_gadget_ep_cmd_params params; | |
1185 | struct dwc3 *dwc = dep->dwc; | |
1186 | int ret; | |
1187 | ||
1188 | memset(¶ms, 0x00, sizeof(params)); | |
1189 | ||
1190 | if (value) { | |
72246da4 FB |
1191 | ret = dwc3_send_gadget_ep_cmd(dwc, dep->number, |
1192 | DWC3_DEPCMD_SETSTALL, ¶ms); | |
1193 | if (ret) | |
1194 | dev_err(dwc->dev, "failed to %s STALL on %s\n", | |
1195 | value ? "set" : "clear", | |
1196 | dep->name); | |
1197 | else | |
1198 | dep->flags |= DWC3_EP_STALL; | |
1199 | } else { | |
5275455a PZ |
1200 | if (dep->flags & DWC3_EP_WEDGE) |
1201 | return 0; | |
1202 | ||
72246da4 FB |
1203 | ret = dwc3_send_gadget_ep_cmd(dwc, dep->number, |
1204 | DWC3_DEPCMD_CLEARSTALL, ¶ms); | |
1205 | if (ret) | |
1206 | dev_err(dwc->dev, "failed to %s STALL on %s\n", | |
1207 | value ? "set" : "clear", | |
1208 | dep->name); | |
1209 | else | |
1210 | dep->flags &= ~DWC3_EP_STALL; | |
1211 | } | |
5275455a | 1212 | |
72246da4 FB |
1213 | return ret; |
1214 | } | |
1215 | ||
1216 | static int dwc3_gadget_ep_set_halt(struct usb_ep *ep, int value) | |
1217 | { | |
1218 | struct dwc3_ep *dep = to_dwc3_ep(ep); | |
1219 | struct dwc3 *dwc = dep->dwc; | |
1220 | ||
1221 | unsigned long flags; | |
1222 | ||
1223 | int ret; | |
1224 | ||
1225 | spin_lock_irqsave(&dwc->lock, flags); | |
1226 | ||
16e78db7 | 1227 | if (usb_endpoint_xfer_isoc(dep->endpoint.desc)) { |
72246da4 FB |
1228 | dev_err(dwc->dev, "%s is of Isochronous type\n", dep->name); |
1229 | ret = -EINVAL; | |
1230 | goto out; | |
1231 | } | |
1232 | ||
1233 | ret = __dwc3_gadget_ep_set_halt(dep, value); | |
1234 | out: | |
1235 | spin_unlock_irqrestore(&dwc->lock, flags); | |
1236 | ||
1237 | return ret; | |
1238 | } | |
1239 | ||
1240 | static int dwc3_gadget_ep_set_wedge(struct usb_ep *ep) | |
1241 | { | |
1242 | struct dwc3_ep *dep = to_dwc3_ep(ep); | |
249a4569 PZ |
1243 | struct dwc3 *dwc = dep->dwc; |
1244 | unsigned long flags; | |
72246da4 | 1245 | |
249a4569 | 1246 | spin_lock_irqsave(&dwc->lock, flags); |
72246da4 | 1247 | dep->flags |= DWC3_EP_WEDGE; |
249a4569 | 1248 | spin_unlock_irqrestore(&dwc->lock, flags); |
72246da4 | 1249 | |
08f0d966 PA |
1250 | if (dep->number == 0 || dep->number == 1) |
1251 | return dwc3_gadget_ep0_set_halt(ep, 1); | |
1252 | else | |
1253 | return dwc3_gadget_ep_set_halt(ep, 1); | |
72246da4 FB |
1254 | } |
1255 | ||
1256 | /* -------------------------------------------------------------------------- */ | |
1257 | ||
1258 | static struct usb_endpoint_descriptor dwc3_gadget_ep0_desc = { | |
1259 | .bLength = USB_DT_ENDPOINT_SIZE, | |
1260 | .bDescriptorType = USB_DT_ENDPOINT, | |
1261 | .bmAttributes = USB_ENDPOINT_XFER_CONTROL, | |
1262 | }; | |
1263 | ||
1264 | static const struct usb_ep_ops dwc3_gadget_ep0_ops = { | |
1265 | .enable = dwc3_gadget_ep0_enable, | |
1266 | .disable = dwc3_gadget_ep0_disable, | |
1267 | .alloc_request = dwc3_gadget_ep_alloc_request, | |
1268 | .free_request = dwc3_gadget_ep_free_request, | |
1269 | .queue = dwc3_gadget_ep0_queue, | |
1270 | .dequeue = dwc3_gadget_ep_dequeue, | |
08f0d966 | 1271 | .set_halt = dwc3_gadget_ep0_set_halt, |
72246da4 FB |
1272 | .set_wedge = dwc3_gadget_ep_set_wedge, |
1273 | }; | |
1274 | ||
1275 | static const struct usb_ep_ops dwc3_gadget_ep_ops = { | |
1276 | .enable = dwc3_gadget_ep_enable, | |
1277 | .disable = dwc3_gadget_ep_disable, | |
1278 | .alloc_request = dwc3_gadget_ep_alloc_request, | |
1279 | .free_request = dwc3_gadget_ep_free_request, | |
1280 | .queue = dwc3_gadget_ep_queue, | |
1281 | .dequeue = dwc3_gadget_ep_dequeue, | |
1282 | .set_halt = dwc3_gadget_ep_set_halt, | |
1283 | .set_wedge = dwc3_gadget_ep_set_wedge, | |
1284 | }; | |
1285 | ||
1286 | /* -------------------------------------------------------------------------- */ | |
1287 | ||
1288 | static int dwc3_gadget_get_frame(struct usb_gadget *g) | |
1289 | { | |
1290 | struct dwc3 *dwc = gadget_to_dwc(g); | |
1291 | u32 reg; | |
1292 | ||
1293 | reg = dwc3_readl(dwc->regs, DWC3_DSTS); | |
1294 | return DWC3_DSTS_SOFFN(reg); | |
1295 | } | |
1296 | ||
1297 | static int dwc3_gadget_wakeup(struct usb_gadget *g) | |
1298 | { | |
1299 | struct dwc3 *dwc = gadget_to_dwc(g); | |
1300 | ||
1301 | unsigned long timeout; | |
1302 | unsigned long flags; | |
1303 | ||
1304 | u32 reg; | |
1305 | ||
1306 | int ret = 0; | |
1307 | ||
1308 | u8 link_state; | |
1309 | u8 speed; | |
1310 | ||
1311 | spin_lock_irqsave(&dwc->lock, flags); | |
1312 | ||
1313 | /* | |
1314 | * According to the Databook Remote wakeup request should | |
1315 | * be issued only when the device is in early suspend state. | |
1316 | * | |
1317 | * We can check that via USB Link State bits in DSTS register. | |
1318 | */ | |
1319 | reg = dwc3_readl(dwc->regs, DWC3_DSTS); | |
1320 | ||
1321 | speed = reg & DWC3_DSTS_CONNECTSPD; | |
1322 | if (speed == DWC3_DSTS_SUPERSPEED) { | |
1323 | dev_dbg(dwc->dev, "no wakeup on SuperSpeed\n"); | |
1324 | ret = -EINVAL; | |
1325 | goto out; | |
1326 | } | |
1327 | ||
1328 | link_state = DWC3_DSTS_USBLNKST(reg); | |
1329 | ||
1330 | switch (link_state) { | |
1331 | case DWC3_LINK_STATE_RX_DET: /* in HS, means Early Suspend */ | |
1332 | case DWC3_LINK_STATE_U3: /* in HS, means SUSPEND */ | |
1333 | break; | |
1334 | default: | |
1335 | dev_dbg(dwc->dev, "can't wakeup from link state %d\n", | |
1336 | link_state); | |
1337 | ret = -EINVAL; | |
1338 | goto out; | |
1339 | } | |
1340 | ||
8598bde7 FB |
1341 | ret = dwc3_gadget_set_link_state(dwc, DWC3_LINK_STATE_RECOV); |
1342 | if (ret < 0) { | |
1343 | dev_err(dwc->dev, "failed to put link in Recovery\n"); | |
1344 | goto out; | |
1345 | } | |
72246da4 | 1346 | |
802fde98 PZ |
1347 | /* Recent versions do this automatically */ |
1348 | if (dwc->revision < DWC3_REVISION_194A) { | |
1349 | /* write zeroes to Link Change Request */ | |
fcc023c7 | 1350 | reg = dwc3_readl(dwc->regs, DWC3_DCTL); |
802fde98 PZ |
1351 | reg &= ~DWC3_DCTL_ULSTCHNGREQ_MASK; |
1352 | dwc3_writel(dwc->regs, DWC3_DCTL, reg); | |
1353 | } | |
72246da4 | 1354 | |
1d046793 | 1355 | /* poll until Link State changes to ON */ |
72246da4 FB |
1356 | timeout = jiffies + msecs_to_jiffies(100); |
1357 | ||
1d046793 | 1358 | while (!time_after(jiffies, timeout)) { |
72246da4 FB |
1359 | reg = dwc3_readl(dwc->regs, DWC3_DSTS); |
1360 | ||
1361 | /* in HS, means ON */ | |
1362 | if (DWC3_DSTS_USBLNKST(reg) == DWC3_LINK_STATE_U0) | |
1363 | break; | |
1364 | } | |
1365 | ||
1366 | if (DWC3_DSTS_USBLNKST(reg) != DWC3_LINK_STATE_U0) { | |
1367 | dev_err(dwc->dev, "failed to send remote wakeup\n"); | |
1368 | ret = -EINVAL; | |
1369 | } | |
1370 | ||
1371 | out: | |
1372 | spin_unlock_irqrestore(&dwc->lock, flags); | |
1373 | ||
1374 | return ret; | |
1375 | } | |
1376 | ||
1377 | static int dwc3_gadget_set_selfpowered(struct usb_gadget *g, | |
1378 | int is_selfpowered) | |
1379 | { | |
1380 | struct dwc3 *dwc = gadget_to_dwc(g); | |
249a4569 | 1381 | unsigned long flags; |
72246da4 | 1382 | |
249a4569 | 1383 | spin_lock_irqsave(&dwc->lock, flags); |
72246da4 | 1384 | dwc->is_selfpowered = !!is_selfpowered; |
249a4569 | 1385 | spin_unlock_irqrestore(&dwc->lock, flags); |
72246da4 FB |
1386 | |
1387 | return 0; | |
1388 | } | |
1389 | ||
6f17f74b | 1390 | static int dwc3_gadget_run_stop(struct dwc3 *dwc, int is_on) |
72246da4 FB |
1391 | { |
1392 | u32 reg; | |
61d58242 | 1393 | u32 timeout = 500; |
72246da4 FB |
1394 | |
1395 | reg = dwc3_readl(dwc->regs, DWC3_DCTL); | |
8db7ed15 | 1396 | if (is_on) { |
802fde98 PZ |
1397 | if (dwc->revision <= DWC3_REVISION_187A) { |
1398 | reg &= ~DWC3_DCTL_TRGTULST_MASK; | |
1399 | reg |= DWC3_DCTL_TRGTULST_RX_DET; | |
1400 | } | |
1401 | ||
1402 | if (dwc->revision >= DWC3_REVISION_194A) | |
1403 | reg &= ~DWC3_DCTL_KEEP_CONNECT; | |
1404 | reg |= DWC3_DCTL_RUN_STOP; | |
8db7ed15 | 1405 | } else { |
72246da4 | 1406 | reg &= ~DWC3_DCTL_RUN_STOP; |
8db7ed15 | 1407 | } |
72246da4 FB |
1408 | |
1409 | dwc3_writel(dwc->regs, DWC3_DCTL, reg); | |
1410 | ||
1411 | do { | |
1412 | reg = dwc3_readl(dwc->regs, DWC3_DSTS); | |
1413 | if (is_on) { | |
1414 | if (!(reg & DWC3_DSTS_DEVCTRLHLT)) | |
1415 | break; | |
1416 | } else { | |
1417 | if (reg & DWC3_DSTS_DEVCTRLHLT) | |
1418 | break; | |
1419 | } | |
72246da4 FB |
1420 | timeout--; |
1421 | if (!timeout) | |
6f17f74b | 1422 | return -ETIMEDOUT; |
61d58242 | 1423 | udelay(1); |
72246da4 FB |
1424 | } while (1); |
1425 | ||
1426 | dev_vdbg(dwc->dev, "gadget %s data soft-%s\n", | |
1427 | dwc->gadget_driver | |
1428 | ? dwc->gadget_driver->function : "no-function", | |
1429 | is_on ? "connect" : "disconnect"); | |
6f17f74b PA |
1430 | |
1431 | return 0; | |
72246da4 FB |
1432 | } |
1433 | ||
1434 | static int dwc3_gadget_pullup(struct usb_gadget *g, int is_on) | |
1435 | { | |
1436 | struct dwc3 *dwc = gadget_to_dwc(g); | |
1437 | unsigned long flags; | |
6f17f74b | 1438 | int ret; |
72246da4 FB |
1439 | |
1440 | is_on = !!is_on; | |
1441 | ||
1442 | spin_lock_irqsave(&dwc->lock, flags); | |
6f17f74b | 1443 | ret = dwc3_gadget_run_stop(dwc, is_on); |
72246da4 FB |
1444 | spin_unlock_irqrestore(&dwc->lock, flags); |
1445 | ||
6f17f74b | 1446 | return ret; |
72246da4 FB |
1447 | } |
1448 | ||
1449 | static int dwc3_gadget_start(struct usb_gadget *g, | |
1450 | struct usb_gadget_driver *driver) | |
1451 | { | |
1452 | struct dwc3 *dwc = gadget_to_dwc(g); | |
1453 | struct dwc3_ep *dep; | |
1454 | unsigned long flags; | |
1455 | int ret = 0; | |
1456 | u32 reg; | |
1457 | ||
1458 | spin_lock_irqsave(&dwc->lock, flags); | |
1459 | ||
1460 | if (dwc->gadget_driver) { | |
1461 | dev_err(dwc->dev, "%s is already bound to %s\n", | |
1462 | dwc->gadget.name, | |
1463 | dwc->gadget_driver->driver.name); | |
1464 | ret = -EBUSY; | |
1465 | goto err0; | |
1466 | } | |
1467 | ||
1468 | dwc->gadget_driver = driver; | |
1469 | dwc->gadget.dev.driver = &driver->driver; | |
1470 | ||
72246da4 FB |
1471 | reg = dwc3_readl(dwc->regs, DWC3_DCFG); |
1472 | reg &= ~(DWC3_DCFG_SPEED_MASK); | |
07e7f47b FB |
1473 | |
1474 | /** | |
1475 | * WORKAROUND: DWC3 revision < 2.20a have an issue | |
1476 | * which would cause metastability state on Run/Stop | |
1477 | * bit if we try to force the IP to USB2-only mode. | |
1478 | * | |
1479 | * Because of that, we cannot configure the IP to any | |
1480 | * speed other than the SuperSpeed | |
1481 | * | |
1482 | * Refers to: | |
1483 | * | |
1484 | * STAR#9000525659: Clock Domain Crossing on DCTL in | |
1485 | * USB 2.0 Mode | |
1486 | */ | |
1487 | if (dwc->revision < DWC3_REVISION_220A) | |
1488 | reg |= DWC3_DCFG_SUPERSPEED; | |
1489 | else | |
1490 | reg |= dwc->maximum_speed; | |
72246da4 FB |
1491 | dwc3_writel(dwc->regs, DWC3_DCFG, reg); |
1492 | ||
b23c8439 PZ |
1493 | dwc->start_config_issued = false; |
1494 | ||
72246da4 FB |
1495 | /* Start with SuperSpeed Default */ |
1496 | dwc3_gadget_ep0_desc.wMaxPacketSize = cpu_to_le16(512); | |
1497 | ||
1498 | dep = dwc->eps[0]; | |
4b345c9a | 1499 | ret = __dwc3_gadget_ep_enable(dep, &dwc3_gadget_ep0_desc, NULL, false); |
72246da4 FB |
1500 | if (ret) { |
1501 | dev_err(dwc->dev, "failed to enable %s\n", dep->name); | |
1502 | goto err0; | |
1503 | } | |
1504 | ||
1505 | dep = dwc->eps[1]; | |
4b345c9a | 1506 | ret = __dwc3_gadget_ep_enable(dep, &dwc3_gadget_ep0_desc, NULL, false); |
72246da4 FB |
1507 | if (ret) { |
1508 | dev_err(dwc->dev, "failed to enable %s\n", dep->name); | |
1509 | goto err1; | |
1510 | } | |
1511 | ||
1512 | /* begin to receive SETUP packets */ | |
c7fcdeb2 | 1513 | dwc->ep0state = EP0_SETUP_PHASE; |
72246da4 FB |
1514 | dwc3_ep0_out_start(dwc); |
1515 | ||
1516 | spin_unlock_irqrestore(&dwc->lock, flags); | |
1517 | ||
1518 | return 0; | |
1519 | ||
1520 | err1: | |
1521 | __dwc3_gadget_ep_disable(dwc->eps[0]); | |
1522 | ||
1523 | err0: | |
1524 | spin_unlock_irqrestore(&dwc->lock, flags); | |
1525 | ||
1526 | return ret; | |
1527 | } | |
1528 | ||
1529 | static int dwc3_gadget_stop(struct usb_gadget *g, | |
1530 | struct usb_gadget_driver *driver) | |
1531 | { | |
1532 | struct dwc3 *dwc = gadget_to_dwc(g); | |
1533 | unsigned long flags; | |
1534 | ||
1535 | spin_lock_irqsave(&dwc->lock, flags); | |
1536 | ||
1537 | __dwc3_gadget_ep_disable(dwc->eps[0]); | |
1538 | __dwc3_gadget_ep_disable(dwc->eps[1]); | |
1539 | ||
1540 | dwc->gadget_driver = NULL; | |
1541 | dwc->gadget.dev.driver = NULL; | |
1542 | ||
1543 | spin_unlock_irqrestore(&dwc->lock, flags); | |
1544 | ||
1545 | return 0; | |
1546 | } | |
802fde98 | 1547 | |
72246da4 FB |
1548 | static const struct usb_gadget_ops dwc3_gadget_ops = { |
1549 | .get_frame = dwc3_gadget_get_frame, | |
1550 | .wakeup = dwc3_gadget_wakeup, | |
1551 | .set_selfpowered = dwc3_gadget_set_selfpowered, | |
1552 | .pullup = dwc3_gadget_pullup, | |
1553 | .udc_start = dwc3_gadget_start, | |
1554 | .udc_stop = dwc3_gadget_stop, | |
1555 | }; | |
1556 | ||
1557 | /* -------------------------------------------------------------------------- */ | |
1558 | ||
1559 | static int __devinit dwc3_gadget_init_endpoints(struct dwc3 *dwc) | |
1560 | { | |
1561 | struct dwc3_ep *dep; | |
1562 | u8 epnum; | |
1563 | ||
1564 | INIT_LIST_HEAD(&dwc->gadget.ep_list); | |
1565 | ||
1566 | for (epnum = 0; epnum < DWC3_ENDPOINTS_NUM; epnum++) { | |
1567 | dep = kzalloc(sizeof(*dep), GFP_KERNEL); | |
1568 | if (!dep) { | |
1569 | dev_err(dwc->dev, "can't allocate endpoint %d\n", | |
1570 | epnum); | |
1571 | return -ENOMEM; | |
1572 | } | |
1573 | ||
1574 | dep->dwc = dwc; | |
1575 | dep->number = epnum; | |
1576 | dwc->eps[epnum] = dep; | |
1577 | ||
1578 | snprintf(dep->name, sizeof(dep->name), "ep%d%s", epnum >> 1, | |
1579 | (epnum & 1) ? "in" : "out"); | |
1580 | dep->endpoint.name = dep->name; | |
1581 | dep->direction = (epnum & 1); | |
1582 | ||
1583 | if (epnum == 0 || epnum == 1) { | |
1584 | dep->endpoint.maxpacket = 512; | |
1585 | dep->endpoint.ops = &dwc3_gadget_ep0_ops; | |
1586 | if (!epnum) | |
1587 | dwc->gadget.ep0 = &dep->endpoint; | |
1588 | } else { | |
1589 | int ret; | |
1590 | ||
1591 | dep->endpoint.maxpacket = 1024; | |
12d36c16 | 1592 | dep->endpoint.max_streams = 15; |
72246da4 FB |
1593 | dep->endpoint.ops = &dwc3_gadget_ep_ops; |
1594 | list_add_tail(&dep->endpoint.ep_list, | |
1595 | &dwc->gadget.ep_list); | |
1596 | ||
1597 | ret = dwc3_alloc_trb_pool(dep); | |
25b8ff68 | 1598 | if (ret) |
72246da4 | 1599 | return ret; |
72246da4 | 1600 | } |
25b8ff68 | 1601 | |
72246da4 FB |
1602 | INIT_LIST_HEAD(&dep->request_list); |
1603 | INIT_LIST_HEAD(&dep->req_queued); | |
1604 | } | |
1605 | ||
1606 | return 0; | |
1607 | } | |
1608 | ||
1609 | static void dwc3_gadget_free_endpoints(struct dwc3 *dwc) | |
1610 | { | |
1611 | struct dwc3_ep *dep; | |
1612 | u8 epnum; | |
1613 | ||
1614 | for (epnum = 0; epnum < DWC3_ENDPOINTS_NUM; epnum++) { | |
1615 | dep = dwc->eps[epnum]; | |
1616 | dwc3_free_trb_pool(dep); | |
1617 | ||
1618 | if (epnum != 0 && epnum != 1) | |
1619 | list_del(&dep->endpoint.ep_list); | |
1620 | ||
1621 | kfree(dep); | |
1622 | } | |
1623 | } | |
1624 | ||
1625 | static void dwc3_gadget_release(struct device *dev) | |
1626 | { | |
1627 | dev_dbg(dev, "%s\n", __func__); | |
1628 | } | |
1629 | ||
1630 | /* -------------------------------------------------------------------------- */ | |
1631 | static int dwc3_cleanup_done_reqs(struct dwc3 *dwc, struct dwc3_ep *dep, | |
1632 | const struct dwc3_event_depevt *event, int status) | |
1633 | { | |
1634 | struct dwc3_request *req; | |
f6bafc6a | 1635 | struct dwc3_trb *trb; |
72246da4 FB |
1636 | unsigned int count; |
1637 | unsigned int s_pkt = 0; | |
d6d6ec7b | 1638 | unsigned int trb_status; |
72246da4 FB |
1639 | |
1640 | do { | |
1641 | req = next_request(&dep->req_queued); | |
d39ee7be SAS |
1642 | if (!req) { |
1643 | WARN_ON_ONCE(1); | |
1644 | return 1; | |
1645 | } | |
72246da4 | 1646 | |
f6bafc6a | 1647 | trb = req->trb; |
72246da4 | 1648 | |
f6bafc6a | 1649 | if ((trb->ctrl & DWC3_TRB_CTRL_HWO) && status != -ESHUTDOWN) |
0d2f4758 SAS |
1650 | /* |
1651 | * We continue despite the error. There is not much we | |
1d046793 PZ |
1652 | * can do. If we don't clean it up we loop forever. If |
1653 | * we skip the TRB then it gets overwritten after a | |
1654 | * while since we use them in a ring buffer. A BUG() | |
1655 | * would help. Lets hope that if this occurs, someone | |
0d2f4758 SAS |
1656 | * fixes the root cause instead of looking away :) |
1657 | */ | |
72246da4 FB |
1658 | dev_err(dwc->dev, "%s's TRB (%p) still owned by HW\n", |
1659 | dep->name, req->trb); | |
f6bafc6a | 1660 | count = trb->size & DWC3_TRB_SIZE_MASK; |
72246da4 FB |
1661 | |
1662 | if (dep->direction) { | |
1663 | if (count) { | |
d6d6ec7b PA |
1664 | trb_status = DWC3_TRB_SIZE_TRBSTS(trb->size); |
1665 | if (trb_status == DWC3_TRBSTS_MISSED_ISOC) { | |
1666 | dev_dbg(dwc->dev, "incomplete IN transfer %s\n", | |
1667 | dep->name); | |
1668 | dep->current_uf = event->parameters & | |
1669 | ~(dep->interval - 1); | |
1670 | dep->flags |= DWC3_EP_MISSED_ISOC; | |
1671 | } else { | |
1672 | dev_err(dwc->dev, "incomplete IN transfer %s\n", | |
1673 | dep->name); | |
1674 | status = -ECONNRESET; | |
1675 | } | |
72246da4 FB |
1676 | } |
1677 | } else { | |
1678 | if (count && (event->status & DEPEVT_STATUS_SHORT)) | |
1679 | s_pkt = 1; | |
1680 | } | |
1681 | ||
1682 | /* | |
1683 | * We assume here we will always receive the entire data block | |
1684 | * which we should receive. Meaning, if we program RX to | |
1685 | * receive 4K but we receive only 2K, we assume that's all we | |
1686 | * should receive and we simply bounce the request back to the | |
1687 | * gadget driver for further processing. | |
1688 | */ | |
1689 | req->request.actual += req->request.length - count; | |
1690 | dwc3_gadget_giveback(dep, req, status); | |
1691 | if (s_pkt) | |
1692 | break; | |
f6bafc6a | 1693 | if ((event->status & DEPEVT_STATUS_LST) && |
70b674bf PA |
1694 | (trb->ctrl & (DWC3_TRB_CTRL_LST | |
1695 | DWC3_TRB_CTRL_HWO))) | |
72246da4 | 1696 | break; |
f6bafc6a FB |
1697 | if ((event->status & DEPEVT_STATUS_IOC) && |
1698 | (trb->ctrl & DWC3_TRB_CTRL_IOC)) | |
72246da4 FB |
1699 | break; |
1700 | } while (1); | |
1701 | ||
f6bafc6a FB |
1702 | if ((event->status & DEPEVT_STATUS_IOC) && |
1703 | (trb->ctrl & DWC3_TRB_CTRL_IOC)) | |
72246da4 FB |
1704 | return 0; |
1705 | return 1; | |
1706 | } | |
1707 | ||
1708 | static void dwc3_endpoint_transfer_complete(struct dwc3 *dwc, | |
1709 | struct dwc3_ep *dep, const struct dwc3_event_depevt *event, | |
1710 | int start_new) | |
1711 | { | |
1712 | unsigned status = 0; | |
1713 | int clean_busy; | |
1714 | ||
1715 | if (event->status & DEPEVT_STATUS_BUSERR) | |
1716 | status = -ECONNRESET; | |
1717 | ||
1d046793 | 1718 | clean_busy = dwc3_cleanup_done_reqs(dwc, dep, event, status); |
c2df85ca | 1719 | if (clean_busy) |
72246da4 | 1720 | dep->flags &= ~DWC3_EP_BUSY; |
fae2b904 FB |
1721 | |
1722 | /* | |
1723 | * WORKAROUND: This is the 2nd half of U1/U2 -> U0 workaround. | |
1724 | * See dwc3_gadget_linksts_change_interrupt() for 1st half. | |
1725 | */ | |
1726 | if (dwc->revision < DWC3_REVISION_183A) { | |
1727 | u32 reg; | |
1728 | int i; | |
1729 | ||
1730 | for (i = 0; i < DWC3_ENDPOINTS_NUM; i++) { | |
348e026f | 1731 | dep = dwc->eps[i]; |
fae2b904 FB |
1732 | |
1733 | if (!(dep->flags & DWC3_EP_ENABLED)) | |
1734 | continue; | |
1735 | ||
1736 | if (!list_empty(&dep->req_queued)) | |
1737 | return; | |
1738 | } | |
1739 | ||
1740 | reg = dwc3_readl(dwc->regs, DWC3_DCTL); | |
1741 | reg |= dwc->u1u2; | |
1742 | dwc3_writel(dwc->regs, DWC3_DCTL, reg); | |
1743 | ||
1744 | dwc->u1u2 = 0; | |
1745 | } | |
72246da4 FB |
1746 | } |
1747 | ||
72246da4 FB |
1748 | static void dwc3_endpoint_interrupt(struct dwc3 *dwc, |
1749 | const struct dwc3_event_depevt *event) | |
1750 | { | |
1751 | struct dwc3_ep *dep; | |
1752 | u8 epnum = event->endpoint_number; | |
1753 | ||
1754 | dep = dwc->eps[epnum]; | |
1755 | ||
3336abb5 FB |
1756 | if (!(dep->flags & DWC3_EP_ENABLED)) |
1757 | return; | |
1758 | ||
72246da4 FB |
1759 | dev_vdbg(dwc->dev, "%s: %s\n", dep->name, |
1760 | dwc3_ep_event_string(event->endpoint_event)); | |
1761 | ||
1762 | if (epnum == 0 || epnum == 1) { | |
1763 | dwc3_ep0_interrupt(dwc, event); | |
1764 | return; | |
1765 | } | |
1766 | ||
1767 | switch (event->endpoint_event) { | |
1768 | case DWC3_DEPEVT_XFERCOMPLETE: | |
b4996a86 | 1769 | dep->resource_index = 0; |
c2df85ca | 1770 | |
16e78db7 | 1771 | if (usb_endpoint_xfer_isoc(dep->endpoint.desc)) { |
72246da4 FB |
1772 | dev_dbg(dwc->dev, "%s is an Isochronous endpoint\n", |
1773 | dep->name); | |
1774 | return; | |
1775 | } | |
1776 | ||
1777 | dwc3_endpoint_transfer_complete(dwc, dep, event, 1); | |
1778 | break; | |
1779 | case DWC3_DEPEVT_XFERINPROGRESS: | |
16e78db7 | 1780 | if (!usb_endpoint_xfer_isoc(dep->endpoint.desc)) { |
72246da4 FB |
1781 | dev_dbg(dwc->dev, "%s is not an Isochronous endpoint\n", |
1782 | dep->name); | |
1783 | return; | |
1784 | } | |
1785 | ||
1786 | dwc3_endpoint_transfer_complete(dwc, dep, event, 0); | |
1787 | break; | |
1788 | case DWC3_DEPEVT_XFERNOTREADY: | |
16e78db7 | 1789 | if (usb_endpoint_xfer_isoc(dep->endpoint.desc)) { |
72246da4 FB |
1790 | dwc3_gadget_start_isoc(dwc, dep, event); |
1791 | } else { | |
1792 | int ret; | |
1793 | ||
1794 | dev_vdbg(dwc->dev, "%s: reason %s\n", | |
40aa41fb FB |
1795 | dep->name, event->status & |
1796 | DEPEVT_STATUS_TRANSFER_ACTIVE | |
72246da4 FB |
1797 | ? "Transfer Active" |
1798 | : "Transfer Not Active"); | |
1799 | ||
1800 | ret = __dwc3_gadget_kick_transfer(dep, 0, 1); | |
1801 | if (!ret || ret == -EBUSY) | |
1802 | return; | |
1803 | ||
1804 | dev_dbg(dwc->dev, "%s: failed to kick transfers\n", | |
1805 | dep->name); | |
1806 | } | |
1807 | ||
879631aa FB |
1808 | break; |
1809 | case DWC3_DEPEVT_STREAMEVT: | |
16e78db7 | 1810 | if (!usb_endpoint_xfer_bulk(dep->endpoint.desc)) { |
879631aa FB |
1811 | dev_err(dwc->dev, "Stream event for non-Bulk %s\n", |
1812 | dep->name); | |
1813 | return; | |
1814 | } | |
1815 | ||
1816 | switch (event->status) { | |
1817 | case DEPEVT_STREAMEVT_FOUND: | |
1818 | dev_vdbg(dwc->dev, "Stream %d found and started\n", | |
1819 | event->parameters); | |
1820 | ||
1821 | break; | |
1822 | case DEPEVT_STREAMEVT_NOTFOUND: | |
1823 | /* FALLTHROUGH */ | |
1824 | default: | |
1825 | dev_dbg(dwc->dev, "Couldn't find suitable stream\n"); | |
1826 | } | |
72246da4 FB |
1827 | break; |
1828 | case DWC3_DEPEVT_RXTXFIFOEVT: | |
1829 | dev_dbg(dwc->dev, "%s FIFO Overrun\n", dep->name); | |
1830 | break; | |
72246da4 | 1831 | case DWC3_DEPEVT_EPCMDCMPLT: |
ea53b882 | 1832 | dev_vdbg(dwc->dev, "Endpoint Command Complete\n"); |
72246da4 FB |
1833 | break; |
1834 | } | |
1835 | } | |
1836 | ||
1837 | static void dwc3_disconnect_gadget(struct dwc3 *dwc) | |
1838 | { | |
1839 | if (dwc->gadget_driver && dwc->gadget_driver->disconnect) { | |
1840 | spin_unlock(&dwc->lock); | |
1841 | dwc->gadget_driver->disconnect(&dwc->gadget); | |
1842 | spin_lock(&dwc->lock); | |
1843 | } | |
1844 | } | |
1845 | ||
1846 | static void dwc3_stop_active_transfer(struct dwc3 *dwc, u32 epnum) | |
1847 | { | |
1848 | struct dwc3_ep *dep; | |
1849 | struct dwc3_gadget_ep_cmd_params params; | |
1850 | u32 cmd; | |
1851 | int ret; | |
1852 | ||
1853 | dep = dwc->eps[epnum]; | |
1854 | ||
b4996a86 | 1855 | if (!dep->resource_index) |
3daf74d7 PA |
1856 | return; |
1857 | ||
57911504 PA |
1858 | /* |
1859 | * NOTICE: We are violating what the Databook says about the | |
1860 | * EndTransfer command. Ideally we would _always_ wait for the | |
1861 | * EndTransfer Command Completion IRQ, but that's causing too | |
1862 | * much trouble synchronizing between us and gadget driver. | |
1863 | * | |
1864 | * We have discussed this with the IP Provider and it was | |
1865 | * suggested to giveback all requests here, but give HW some | |
1866 | * extra time to synchronize with the interconnect. We're using | |
1867 | * an arbitraty 100us delay for that. | |
1868 | * | |
1869 | * Note also that a similar handling was tested by Synopsys | |
1870 | * (thanks a lot Paul) and nothing bad has come out of it. | |
1871 | * In short, what we're doing is: | |
1872 | * | |
1873 | * - Issue EndTransfer WITH CMDIOC bit set | |
1874 | * - Wait 100us | |
1875 | */ | |
1876 | ||
3daf74d7 PA |
1877 | cmd = DWC3_DEPCMD_ENDTRANSFER; |
1878 | cmd |= DWC3_DEPCMD_HIPRI_FORCERM | DWC3_DEPCMD_CMDIOC; | |
b4996a86 | 1879 | cmd |= DWC3_DEPCMD_PARAM(dep->resource_index); |
3daf74d7 PA |
1880 | memset(¶ms, 0, sizeof(params)); |
1881 | ret = dwc3_send_gadget_ep_cmd(dwc, dep->number, cmd, ¶ms); | |
1882 | WARN_ON_ONCE(ret); | |
b4996a86 | 1883 | dep->resource_index = 0; |
57911504 PA |
1884 | |
1885 | udelay(100); | |
72246da4 FB |
1886 | } |
1887 | ||
1888 | static void dwc3_stop_active_transfers(struct dwc3 *dwc) | |
1889 | { | |
1890 | u32 epnum; | |
1891 | ||
1892 | for (epnum = 2; epnum < DWC3_ENDPOINTS_NUM; epnum++) { | |
1893 | struct dwc3_ep *dep; | |
1894 | ||
1895 | dep = dwc->eps[epnum]; | |
1896 | if (!(dep->flags & DWC3_EP_ENABLED)) | |
1897 | continue; | |
1898 | ||
624407f9 | 1899 | dwc3_remove_requests(dwc, dep); |
72246da4 FB |
1900 | } |
1901 | } | |
1902 | ||
1903 | static void dwc3_clear_stall_all_ep(struct dwc3 *dwc) | |
1904 | { | |
1905 | u32 epnum; | |
1906 | ||
1907 | for (epnum = 1; epnum < DWC3_ENDPOINTS_NUM; epnum++) { | |
1908 | struct dwc3_ep *dep; | |
1909 | struct dwc3_gadget_ep_cmd_params params; | |
1910 | int ret; | |
1911 | ||
1912 | dep = dwc->eps[epnum]; | |
1913 | ||
1914 | if (!(dep->flags & DWC3_EP_STALL)) | |
1915 | continue; | |
1916 | ||
1917 | dep->flags &= ~DWC3_EP_STALL; | |
1918 | ||
1919 | memset(¶ms, 0, sizeof(params)); | |
1920 | ret = dwc3_send_gadget_ep_cmd(dwc, dep->number, | |
1921 | DWC3_DEPCMD_CLEARSTALL, ¶ms); | |
1922 | WARN_ON_ONCE(ret); | |
1923 | } | |
1924 | } | |
1925 | ||
1926 | static void dwc3_gadget_disconnect_interrupt(struct dwc3 *dwc) | |
1927 | { | |
c4430a26 FB |
1928 | int reg; |
1929 | ||
72246da4 | 1930 | dev_vdbg(dwc->dev, "%s\n", __func__); |
72246da4 FB |
1931 | |
1932 | reg = dwc3_readl(dwc->regs, DWC3_DCTL); | |
1933 | reg &= ~DWC3_DCTL_INITU1ENA; | |
1934 | dwc3_writel(dwc->regs, DWC3_DCTL, reg); | |
1935 | ||
1936 | reg &= ~DWC3_DCTL_INITU2ENA; | |
1937 | dwc3_writel(dwc->regs, DWC3_DCTL, reg); | |
72246da4 | 1938 | |
72246da4 | 1939 | dwc3_disconnect_gadget(dwc); |
b23c8439 | 1940 | dwc->start_config_issued = false; |
72246da4 FB |
1941 | |
1942 | dwc->gadget.speed = USB_SPEED_UNKNOWN; | |
df62df56 | 1943 | dwc->setup_packet_pending = false; |
72246da4 FB |
1944 | } |
1945 | ||
d7a46a8d | 1946 | static void dwc3_gadget_usb3_phy_suspend(struct dwc3 *dwc, int suspend) |
72246da4 FB |
1947 | { |
1948 | u32 reg; | |
1949 | ||
1950 | reg = dwc3_readl(dwc->regs, DWC3_GUSB3PIPECTL(0)); | |
1951 | ||
d7a46a8d | 1952 | if (suspend) |
72246da4 | 1953 | reg |= DWC3_GUSB3PIPECTL_SUSPHY; |
d7a46a8d PZ |
1954 | else |
1955 | reg &= ~DWC3_GUSB3PIPECTL_SUSPHY; | |
72246da4 FB |
1956 | |
1957 | dwc3_writel(dwc->regs, DWC3_GUSB3PIPECTL(0), reg); | |
1958 | } | |
1959 | ||
d7a46a8d | 1960 | static void dwc3_gadget_usb2_phy_suspend(struct dwc3 *dwc, int suspend) |
72246da4 FB |
1961 | { |
1962 | u32 reg; | |
1963 | ||
1964 | reg = dwc3_readl(dwc->regs, DWC3_GUSB2PHYCFG(0)); | |
1965 | ||
d7a46a8d | 1966 | if (suspend) |
72246da4 | 1967 | reg |= DWC3_GUSB2PHYCFG_SUSPHY; |
d7a46a8d PZ |
1968 | else |
1969 | reg &= ~DWC3_GUSB2PHYCFG_SUSPHY; | |
72246da4 FB |
1970 | |
1971 | dwc3_writel(dwc->regs, DWC3_GUSB2PHYCFG(0), reg); | |
1972 | } | |
1973 | ||
1974 | static void dwc3_gadget_reset_interrupt(struct dwc3 *dwc) | |
1975 | { | |
1976 | u32 reg; | |
1977 | ||
1978 | dev_vdbg(dwc->dev, "%s\n", __func__); | |
1979 | ||
df62df56 FB |
1980 | /* |
1981 | * WORKAROUND: DWC3 revisions <1.88a have an issue which | |
1982 | * would cause a missing Disconnect Event if there's a | |
1983 | * pending Setup Packet in the FIFO. | |
1984 | * | |
1985 | * There's no suggested workaround on the official Bug | |
1986 | * report, which states that "unless the driver/application | |
1987 | * is doing any special handling of a disconnect event, | |
1988 | * there is no functional issue". | |
1989 | * | |
1990 | * Unfortunately, it turns out that we _do_ some special | |
1991 | * handling of a disconnect event, namely complete all | |
1992 | * pending transfers, notify gadget driver of the | |
1993 | * disconnection, and so on. | |
1994 | * | |
1995 | * Our suggested workaround is to follow the Disconnect | |
1996 | * Event steps here, instead, based on a setup_packet_pending | |
1997 | * flag. Such flag gets set whenever we have a XferNotReady | |
1998 | * event on EP0 and gets cleared on XferComplete for the | |
1999 | * same endpoint. | |
2000 | * | |
2001 | * Refers to: | |
2002 | * | |
2003 | * STAR#9000466709: RTL: Device : Disconnect event not | |
2004 | * generated if setup packet pending in FIFO | |
2005 | */ | |
2006 | if (dwc->revision < DWC3_REVISION_188A) { | |
2007 | if (dwc->setup_packet_pending) | |
2008 | dwc3_gadget_disconnect_interrupt(dwc); | |
2009 | } | |
2010 | ||
961906ed FB |
2011 | /* after reset -> Default State */ |
2012 | dwc->dev_state = DWC3_DEFAULT_STATE; | |
2013 | ||
802fde98 PZ |
2014 | /* Recent versions support automatic phy suspend and don't need this */ |
2015 | if (dwc->revision < DWC3_REVISION_194A) { | |
2016 | /* Resume PHYs */ | |
2017 | dwc3_gadget_usb2_phy_suspend(dwc, false); | |
2018 | dwc3_gadget_usb3_phy_suspend(dwc, false); | |
2019 | } | |
72246da4 FB |
2020 | |
2021 | if (dwc->gadget.speed != USB_SPEED_UNKNOWN) | |
2022 | dwc3_disconnect_gadget(dwc); | |
2023 | ||
2024 | reg = dwc3_readl(dwc->regs, DWC3_DCTL); | |
2025 | reg &= ~DWC3_DCTL_TSTCTRL_MASK; | |
2026 | dwc3_writel(dwc->regs, DWC3_DCTL, reg); | |
3b637367 | 2027 | dwc->test_mode = false; |
72246da4 FB |
2028 | |
2029 | dwc3_stop_active_transfers(dwc); | |
2030 | dwc3_clear_stall_all_ep(dwc); | |
b23c8439 | 2031 | dwc->start_config_issued = false; |
72246da4 FB |
2032 | |
2033 | /* Reset device address to zero */ | |
2034 | reg = dwc3_readl(dwc->regs, DWC3_DCFG); | |
2035 | reg &= ~(DWC3_DCFG_DEVADDR_MASK); | |
2036 | dwc3_writel(dwc->regs, DWC3_DCFG, reg); | |
72246da4 FB |
2037 | } |
2038 | ||
2039 | static void dwc3_update_ram_clk_sel(struct dwc3 *dwc, u32 speed) | |
2040 | { | |
2041 | u32 reg; | |
2042 | u32 usb30_clock = DWC3_GCTL_CLK_BUS; | |
2043 | ||
2044 | /* | |
2045 | * We change the clock only at SS but I dunno why I would want to do | |
2046 | * this. Maybe it becomes part of the power saving plan. | |
2047 | */ | |
2048 | ||
2049 | if (speed != DWC3_DSTS_SUPERSPEED) | |
2050 | return; | |
2051 | ||
2052 | /* | |
2053 | * RAMClkSel is reset to 0 after USB reset, so it must be reprogrammed | |
2054 | * each time on Connect Done. | |
2055 | */ | |
2056 | if (!usb30_clock) | |
2057 | return; | |
2058 | ||
2059 | reg = dwc3_readl(dwc->regs, DWC3_GCTL); | |
2060 | reg |= DWC3_GCTL_RAMCLKSEL(usb30_clock); | |
2061 | dwc3_writel(dwc->regs, DWC3_GCTL, reg); | |
2062 | } | |
2063 | ||
d7a46a8d | 2064 | static void dwc3_gadget_phy_suspend(struct dwc3 *dwc, u8 speed) |
72246da4 FB |
2065 | { |
2066 | switch (speed) { | |
2067 | case USB_SPEED_SUPER: | |
d7a46a8d | 2068 | dwc3_gadget_usb2_phy_suspend(dwc, true); |
72246da4 FB |
2069 | break; |
2070 | case USB_SPEED_HIGH: | |
2071 | case USB_SPEED_FULL: | |
2072 | case USB_SPEED_LOW: | |
d7a46a8d | 2073 | dwc3_gadget_usb3_phy_suspend(dwc, true); |
72246da4 FB |
2074 | break; |
2075 | } | |
2076 | } | |
2077 | ||
2078 | static void dwc3_gadget_conndone_interrupt(struct dwc3 *dwc) | |
2079 | { | |
2080 | struct dwc3_gadget_ep_cmd_params params; | |
2081 | struct dwc3_ep *dep; | |
2082 | int ret; | |
2083 | u32 reg; | |
2084 | u8 speed; | |
2085 | ||
2086 | dev_vdbg(dwc->dev, "%s\n", __func__); | |
2087 | ||
2088 | memset(¶ms, 0x00, sizeof(params)); | |
2089 | ||
72246da4 FB |
2090 | reg = dwc3_readl(dwc->regs, DWC3_DSTS); |
2091 | speed = reg & DWC3_DSTS_CONNECTSPD; | |
2092 | dwc->speed = speed; | |
2093 | ||
2094 | dwc3_update_ram_clk_sel(dwc, speed); | |
2095 | ||
2096 | switch (speed) { | |
2097 | case DWC3_DCFG_SUPERSPEED: | |
05870c5b FB |
2098 | /* |
2099 | * WORKAROUND: DWC3 revisions <1.90a have an issue which | |
2100 | * would cause a missing USB3 Reset event. | |
2101 | * | |
2102 | * In such situations, we should force a USB3 Reset | |
2103 | * event by calling our dwc3_gadget_reset_interrupt() | |
2104 | * routine. | |
2105 | * | |
2106 | * Refers to: | |
2107 | * | |
2108 | * STAR#9000483510: RTL: SS : USB3 reset event may | |
2109 | * not be generated always when the link enters poll | |
2110 | */ | |
2111 | if (dwc->revision < DWC3_REVISION_190A) | |
2112 | dwc3_gadget_reset_interrupt(dwc); | |
2113 | ||
72246da4 FB |
2114 | dwc3_gadget_ep0_desc.wMaxPacketSize = cpu_to_le16(512); |
2115 | dwc->gadget.ep0->maxpacket = 512; | |
2116 | dwc->gadget.speed = USB_SPEED_SUPER; | |
2117 | break; | |
2118 | case DWC3_DCFG_HIGHSPEED: | |
2119 | dwc3_gadget_ep0_desc.wMaxPacketSize = cpu_to_le16(64); | |
2120 | dwc->gadget.ep0->maxpacket = 64; | |
2121 | dwc->gadget.speed = USB_SPEED_HIGH; | |
2122 | break; | |
2123 | case DWC3_DCFG_FULLSPEED2: | |
2124 | case DWC3_DCFG_FULLSPEED1: | |
2125 | dwc3_gadget_ep0_desc.wMaxPacketSize = cpu_to_le16(64); | |
2126 | dwc->gadget.ep0->maxpacket = 64; | |
2127 | dwc->gadget.speed = USB_SPEED_FULL; | |
2128 | break; | |
2129 | case DWC3_DCFG_LOWSPEED: | |
2130 | dwc3_gadget_ep0_desc.wMaxPacketSize = cpu_to_le16(8); | |
2131 | dwc->gadget.ep0->maxpacket = 8; | |
2132 | dwc->gadget.speed = USB_SPEED_LOW; | |
2133 | break; | |
2134 | } | |
2135 | ||
802fde98 PZ |
2136 | /* Recent versions support automatic phy suspend and don't need this */ |
2137 | if (dwc->revision < DWC3_REVISION_194A) { | |
2138 | /* Suspend unneeded PHY */ | |
2139 | dwc3_gadget_phy_suspend(dwc, dwc->gadget.speed); | |
2140 | } | |
72246da4 FB |
2141 | |
2142 | dep = dwc->eps[0]; | |
4b345c9a | 2143 | ret = __dwc3_gadget_ep_enable(dep, &dwc3_gadget_ep0_desc, NULL, true); |
72246da4 FB |
2144 | if (ret) { |
2145 | dev_err(dwc->dev, "failed to enable %s\n", dep->name); | |
2146 | return; | |
2147 | } | |
2148 | ||
2149 | dep = dwc->eps[1]; | |
4b345c9a | 2150 | ret = __dwc3_gadget_ep_enable(dep, &dwc3_gadget_ep0_desc, NULL, true); |
72246da4 FB |
2151 | if (ret) { |
2152 | dev_err(dwc->dev, "failed to enable %s\n", dep->name); | |
2153 | return; | |
2154 | } | |
2155 | ||
2156 | /* | |
2157 | * Configure PHY via GUSB3PIPECTLn if required. | |
2158 | * | |
2159 | * Update GTXFIFOSIZn | |
2160 | * | |
2161 | * In both cases reset values should be sufficient. | |
2162 | */ | |
2163 | } | |
2164 | ||
2165 | static void dwc3_gadget_wakeup_interrupt(struct dwc3 *dwc) | |
2166 | { | |
2167 | dev_vdbg(dwc->dev, "%s\n", __func__); | |
2168 | ||
2169 | /* | |
2170 | * TODO take core out of low power mode when that's | |
2171 | * implemented. | |
2172 | */ | |
2173 | ||
2174 | dwc->gadget_driver->resume(&dwc->gadget); | |
2175 | } | |
2176 | ||
2177 | static void dwc3_gadget_linksts_change_interrupt(struct dwc3 *dwc, | |
2178 | unsigned int evtinfo) | |
2179 | { | |
fae2b904 FB |
2180 | enum dwc3_link_state next = evtinfo & DWC3_LINK_STATE_MASK; |
2181 | ||
2182 | /* | |
2183 | * WORKAROUND: DWC3 Revisions <1.83a have an issue which, depending | |
2184 | * on the link partner, the USB session might do multiple entry/exit | |
2185 | * of low power states before a transfer takes place. | |
2186 | * | |
2187 | * Due to this problem, we might experience lower throughput. The | |
2188 | * suggested workaround is to disable DCTL[12:9] bits if we're | |
2189 | * transitioning from U1/U2 to U0 and enable those bits again | |
2190 | * after a transfer completes and there are no pending transfers | |
2191 | * on any of the enabled endpoints. | |
2192 | * | |
2193 | * This is the first half of that workaround. | |
2194 | * | |
2195 | * Refers to: | |
2196 | * | |
2197 | * STAR#9000446952: RTL: Device SS : if U1/U2 ->U0 takes >128us | |
2198 | * core send LGO_Ux entering U0 | |
2199 | */ | |
2200 | if (dwc->revision < DWC3_REVISION_183A) { | |
2201 | if (next == DWC3_LINK_STATE_U0) { | |
2202 | u32 u1u2; | |
2203 | u32 reg; | |
2204 | ||
2205 | switch (dwc->link_state) { | |
2206 | case DWC3_LINK_STATE_U1: | |
2207 | case DWC3_LINK_STATE_U2: | |
2208 | reg = dwc3_readl(dwc->regs, DWC3_DCTL); | |
2209 | u1u2 = reg & (DWC3_DCTL_INITU2ENA | |
2210 | | DWC3_DCTL_ACCEPTU2ENA | |
2211 | | DWC3_DCTL_INITU1ENA | |
2212 | | DWC3_DCTL_ACCEPTU1ENA); | |
2213 | ||
2214 | if (!dwc->u1u2) | |
2215 | dwc->u1u2 = reg & u1u2; | |
2216 | ||
2217 | reg &= ~u1u2; | |
2218 | ||
2219 | dwc3_writel(dwc->regs, DWC3_DCTL, reg); | |
2220 | break; | |
2221 | default: | |
2222 | /* do nothing */ | |
2223 | break; | |
2224 | } | |
2225 | } | |
2226 | } | |
2227 | ||
2228 | dwc->link_state = next; | |
019ac832 FB |
2229 | |
2230 | dev_vdbg(dwc->dev, "%s link %d\n", __func__, dwc->link_state); | |
72246da4 FB |
2231 | } |
2232 | ||
2233 | static void dwc3_gadget_interrupt(struct dwc3 *dwc, | |
2234 | const struct dwc3_event_devt *event) | |
2235 | { | |
2236 | switch (event->type) { | |
2237 | case DWC3_DEVICE_EVENT_DISCONNECT: | |
2238 | dwc3_gadget_disconnect_interrupt(dwc); | |
2239 | break; | |
2240 | case DWC3_DEVICE_EVENT_RESET: | |
2241 | dwc3_gadget_reset_interrupt(dwc); | |
2242 | break; | |
2243 | case DWC3_DEVICE_EVENT_CONNECT_DONE: | |
2244 | dwc3_gadget_conndone_interrupt(dwc); | |
2245 | break; | |
2246 | case DWC3_DEVICE_EVENT_WAKEUP: | |
2247 | dwc3_gadget_wakeup_interrupt(dwc); | |
2248 | break; | |
2249 | case DWC3_DEVICE_EVENT_LINK_STATUS_CHANGE: | |
2250 | dwc3_gadget_linksts_change_interrupt(dwc, event->event_info); | |
2251 | break; | |
2252 | case DWC3_DEVICE_EVENT_EOPF: | |
2253 | dev_vdbg(dwc->dev, "End of Periodic Frame\n"); | |
2254 | break; | |
2255 | case DWC3_DEVICE_EVENT_SOF: | |
2256 | dev_vdbg(dwc->dev, "Start of Periodic Frame\n"); | |
2257 | break; | |
2258 | case DWC3_DEVICE_EVENT_ERRATIC_ERROR: | |
2259 | dev_vdbg(dwc->dev, "Erratic Error\n"); | |
2260 | break; | |
2261 | case DWC3_DEVICE_EVENT_CMD_CMPL: | |
2262 | dev_vdbg(dwc->dev, "Command Complete\n"); | |
2263 | break; | |
2264 | case DWC3_DEVICE_EVENT_OVERFLOW: | |
2265 | dev_vdbg(dwc->dev, "Overflow\n"); | |
2266 | break; | |
2267 | default: | |
2268 | dev_dbg(dwc->dev, "UNKNOWN IRQ %d\n", event->type); | |
2269 | } | |
2270 | } | |
2271 | ||
2272 | static void dwc3_process_event_entry(struct dwc3 *dwc, | |
2273 | const union dwc3_event *event) | |
2274 | { | |
2275 | /* Endpoint IRQ, handle it and return early */ | |
2276 | if (event->type.is_devspec == 0) { | |
2277 | /* depevt */ | |
2278 | return dwc3_endpoint_interrupt(dwc, &event->depevt); | |
2279 | } | |
2280 | ||
2281 | switch (event->type.type) { | |
2282 | case DWC3_EVENT_TYPE_DEV: | |
2283 | dwc3_gadget_interrupt(dwc, &event->devt); | |
2284 | break; | |
2285 | /* REVISIT what to do with Carkit and I2C events ? */ | |
2286 | default: | |
2287 | dev_err(dwc->dev, "UNKNOWN IRQ type %d\n", event->raw); | |
2288 | } | |
2289 | } | |
2290 | ||
2291 | static irqreturn_t dwc3_process_event_buf(struct dwc3 *dwc, u32 buf) | |
2292 | { | |
2293 | struct dwc3_event_buffer *evt; | |
2294 | int left; | |
2295 | u32 count; | |
2296 | ||
2297 | count = dwc3_readl(dwc->regs, DWC3_GEVNTCOUNT(buf)); | |
2298 | count &= DWC3_GEVNTCOUNT_MASK; | |
2299 | if (!count) | |
2300 | return IRQ_NONE; | |
2301 | ||
2302 | evt = dwc->ev_buffs[buf]; | |
2303 | left = count; | |
2304 | ||
2305 | while (left > 0) { | |
2306 | union dwc3_event event; | |
2307 | ||
d70d8442 FB |
2308 | event.raw = *(u32 *) (evt->buf + evt->lpos); |
2309 | ||
72246da4 FB |
2310 | dwc3_process_event_entry(dwc, &event); |
2311 | /* | |
2312 | * XXX we wrap around correctly to the next entry as almost all | |
2313 | * entries are 4 bytes in size. There is one entry which has 12 | |
2314 | * bytes which is a regular entry followed by 8 bytes data. ATM | |
2315 | * I don't know how things are organized if were get next to the | |
2316 | * a boundary so I worry about that once we try to handle that. | |
2317 | */ | |
2318 | evt->lpos = (evt->lpos + 4) % DWC3_EVENT_BUFFERS_SIZE; | |
2319 | left -= 4; | |
2320 | ||
2321 | dwc3_writel(dwc->regs, DWC3_GEVNTCOUNT(buf), 4); | |
2322 | } | |
2323 | ||
2324 | return IRQ_HANDLED; | |
2325 | } | |
2326 | ||
2327 | static irqreturn_t dwc3_interrupt(int irq, void *_dwc) | |
2328 | { | |
2329 | struct dwc3 *dwc = _dwc; | |
2330 | int i; | |
2331 | irqreturn_t ret = IRQ_NONE; | |
2332 | ||
2333 | spin_lock(&dwc->lock); | |
2334 | ||
9f622b2a | 2335 | for (i = 0; i < dwc->num_event_buffers; i++) { |
72246da4 FB |
2336 | irqreturn_t status; |
2337 | ||
2338 | status = dwc3_process_event_buf(dwc, i); | |
2339 | if (status == IRQ_HANDLED) | |
2340 | ret = status; | |
2341 | } | |
2342 | ||
2343 | spin_unlock(&dwc->lock); | |
2344 | ||
2345 | return ret; | |
2346 | } | |
2347 | ||
2348 | /** | |
2349 | * dwc3_gadget_init - Initializes gadget related registers | |
1d046793 | 2350 | * @dwc: pointer to our controller context structure |
72246da4 FB |
2351 | * |
2352 | * Returns 0 on success otherwise negative errno. | |
2353 | */ | |
2354 | int __devinit dwc3_gadget_init(struct dwc3 *dwc) | |
2355 | { | |
2356 | u32 reg; | |
2357 | int ret; | |
2358 | int irq; | |
2359 | ||
2360 | dwc->ctrl_req = dma_alloc_coherent(dwc->dev, sizeof(*dwc->ctrl_req), | |
2361 | &dwc->ctrl_req_addr, GFP_KERNEL); | |
2362 | if (!dwc->ctrl_req) { | |
2363 | dev_err(dwc->dev, "failed to allocate ctrl request\n"); | |
2364 | ret = -ENOMEM; | |
2365 | goto err0; | |
2366 | } | |
2367 | ||
2368 | dwc->ep0_trb = dma_alloc_coherent(dwc->dev, sizeof(*dwc->ep0_trb), | |
2369 | &dwc->ep0_trb_addr, GFP_KERNEL); | |
2370 | if (!dwc->ep0_trb) { | |
2371 | dev_err(dwc->dev, "failed to allocate ep0 trb\n"); | |
2372 | ret = -ENOMEM; | |
2373 | goto err1; | |
2374 | } | |
2375 | ||
3ef35faf | 2376 | dwc->setup_buf = kzalloc(DWC3_EP0_BOUNCE_SIZE, GFP_KERNEL); |
72246da4 FB |
2377 | if (!dwc->setup_buf) { |
2378 | dev_err(dwc->dev, "failed to allocate setup buffer\n"); | |
2379 | ret = -ENOMEM; | |
2380 | goto err2; | |
2381 | } | |
2382 | ||
5812b1c2 | 2383 | dwc->ep0_bounce = dma_alloc_coherent(dwc->dev, |
3ef35faf FB |
2384 | DWC3_EP0_BOUNCE_SIZE, &dwc->ep0_bounce_addr, |
2385 | GFP_KERNEL); | |
5812b1c2 FB |
2386 | if (!dwc->ep0_bounce) { |
2387 | dev_err(dwc->dev, "failed to allocate ep0 bounce buffer\n"); | |
2388 | ret = -ENOMEM; | |
2389 | goto err3; | |
2390 | } | |
2391 | ||
72246da4 FB |
2392 | dev_set_name(&dwc->gadget.dev, "gadget"); |
2393 | ||
2394 | dwc->gadget.ops = &dwc3_gadget_ops; | |
d327ab5b | 2395 | dwc->gadget.max_speed = USB_SPEED_SUPER; |
72246da4 FB |
2396 | dwc->gadget.speed = USB_SPEED_UNKNOWN; |
2397 | dwc->gadget.dev.parent = dwc->dev; | |
eeb720fb | 2398 | dwc->gadget.sg_supported = true; |
72246da4 FB |
2399 | |
2400 | dma_set_coherent_mask(&dwc->gadget.dev, dwc->dev->coherent_dma_mask); | |
2401 | ||
2402 | dwc->gadget.dev.dma_parms = dwc->dev->dma_parms; | |
2403 | dwc->gadget.dev.dma_mask = dwc->dev->dma_mask; | |
2404 | dwc->gadget.dev.release = dwc3_gadget_release; | |
2405 | dwc->gadget.name = "dwc3-gadget"; | |
2406 | ||
2407 | /* | |
2408 | * REVISIT: Here we should clear all pending IRQs to be | |
2409 | * sure we're starting from a well known location. | |
2410 | */ | |
2411 | ||
2412 | ret = dwc3_gadget_init_endpoints(dwc); | |
2413 | if (ret) | |
5812b1c2 | 2414 | goto err4; |
72246da4 FB |
2415 | |
2416 | irq = platform_get_irq(to_platform_device(dwc->dev), 0); | |
2417 | ||
2418 | ret = request_irq(irq, dwc3_interrupt, IRQF_SHARED, | |
2419 | "dwc3", dwc); | |
2420 | if (ret) { | |
2421 | dev_err(dwc->dev, "failed to request irq #%d --> %d\n", | |
2422 | irq, ret); | |
5812b1c2 | 2423 | goto err5; |
72246da4 FB |
2424 | } |
2425 | ||
e6a3b5e2 SAS |
2426 | reg = dwc3_readl(dwc->regs, DWC3_DCFG); |
2427 | reg |= DWC3_DCFG_LPM_CAP; | |
2428 | dwc3_writel(dwc->regs, DWC3_DCFG, reg); | |
2429 | ||
72246da4 FB |
2430 | /* Enable all but Start and End of Frame IRQs */ |
2431 | reg = (DWC3_DEVTEN_VNDRDEVTSTRCVEDEN | | |
2432 | DWC3_DEVTEN_EVNTOVERFLOWEN | | |
2433 | DWC3_DEVTEN_CMDCMPLTEN | | |
2434 | DWC3_DEVTEN_ERRTICERREN | | |
2435 | DWC3_DEVTEN_WKUPEVTEN | | |
2436 | DWC3_DEVTEN_ULSTCNGEN | | |
2437 | DWC3_DEVTEN_CONNECTDONEEN | | |
2438 | DWC3_DEVTEN_USBRSTEN | | |
2439 | DWC3_DEVTEN_DISCONNEVTEN); | |
2440 | dwc3_writel(dwc->regs, DWC3_DEVTEN, reg); | |
2441 | ||
802fde98 PZ |
2442 | /* Enable USB2 LPM and automatic phy suspend only on recent versions */ |
2443 | if (dwc->revision >= DWC3_REVISION_194A) { | |
2444 | reg = dwc3_readl(dwc->regs, DWC3_DCFG); | |
2445 | reg |= DWC3_DCFG_LPM_CAP; | |
2446 | dwc3_writel(dwc->regs, DWC3_DCFG, reg); | |
2447 | ||
2448 | reg = dwc3_readl(dwc->regs, DWC3_DCTL); | |
2449 | reg &= ~(DWC3_DCTL_HIRD_THRES_MASK | DWC3_DCTL_L1_HIBER_EN); | |
2450 | ||
2451 | /* TODO: This should be configurable */ | |
cbc725b3 | 2452 | reg |= DWC3_DCTL_HIRD_THRES(28); |
802fde98 PZ |
2453 | |
2454 | dwc3_writel(dwc->regs, DWC3_DCTL, reg); | |
2455 | ||
dcae3573 PA |
2456 | dwc3_gadget_usb2_phy_suspend(dwc, false); |
2457 | dwc3_gadget_usb3_phy_suspend(dwc, false); | |
802fde98 PZ |
2458 | } |
2459 | ||
72246da4 FB |
2460 | ret = device_register(&dwc->gadget.dev); |
2461 | if (ret) { | |
2462 | dev_err(dwc->dev, "failed to register gadget device\n"); | |
2463 | put_device(&dwc->gadget.dev); | |
5812b1c2 | 2464 | goto err6; |
72246da4 FB |
2465 | } |
2466 | ||
2467 | ret = usb_add_gadget_udc(dwc->dev, &dwc->gadget); | |
2468 | if (ret) { | |
2469 | dev_err(dwc->dev, "failed to register udc\n"); | |
5812b1c2 | 2470 | goto err7; |
72246da4 FB |
2471 | } |
2472 | ||
2473 | return 0; | |
2474 | ||
5812b1c2 | 2475 | err7: |
72246da4 FB |
2476 | device_unregister(&dwc->gadget.dev); |
2477 | ||
5812b1c2 | 2478 | err6: |
72246da4 FB |
2479 | dwc3_writel(dwc->regs, DWC3_DEVTEN, 0x00); |
2480 | free_irq(irq, dwc); | |
2481 | ||
5812b1c2 | 2482 | err5: |
72246da4 FB |
2483 | dwc3_gadget_free_endpoints(dwc); |
2484 | ||
5812b1c2 | 2485 | err4: |
3ef35faf FB |
2486 | dma_free_coherent(dwc->dev, DWC3_EP0_BOUNCE_SIZE, |
2487 | dwc->ep0_bounce, dwc->ep0_bounce_addr); | |
5812b1c2 | 2488 | |
72246da4 | 2489 | err3: |
0fc9a1be | 2490 | kfree(dwc->setup_buf); |
72246da4 FB |
2491 | |
2492 | err2: | |
2493 | dma_free_coherent(dwc->dev, sizeof(*dwc->ep0_trb), | |
2494 | dwc->ep0_trb, dwc->ep0_trb_addr); | |
2495 | ||
2496 | err1: | |
2497 | dma_free_coherent(dwc->dev, sizeof(*dwc->ctrl_req), | |
2498 | dwc->ctrl_req, dwc->ctrl_req_addr); | |
2499 | ||
2500 | err0: | |
2501 | return ret; | |
2502 | } | |
2503 | ||
2504 | void dwc3_gadget_exit(struct dwc3 *dwc) | |
2505 | { | |
2506 | int irq; | |
72246da4 FB |
2507 | |
2508 | usb_del_gadget_udc(&dwc->gadget); | |
2509 | irq = platform_get_irq(to_platform_device(dwc->dev), 0); | |
2510 | ||
2511 | dwc3_writel(dwc->regs, DWC3_DEVTEN, 0x00); | |
2512 | free_irq(irq, dwc); | |
2513 | ||
72246da4 FB |
2514 | dwc3_gadget_free_endpoints(dwc); |
2515 | ||
3ef35faf FB |
2516 | dma_free_coherent(dwc->dev, DWC3_EP0_BOUNCE_SIZE, |
2517 | dwc->ep0_bounce, dwc->ep0_bounce_addr); | |
5812b1c2 | 2518 | |
0fc9a1be | 2519 | kfree(dwc->setup_buf); |
72246da4 FB |
2520 | |
2521 | dma_free_coherent(dwc->dev, sizeof(*dwc->ep0_trb), | |
2522 | dwc->ep0_trb, dwc->ep0_trb_addr); | |
2523 | ||
2524 | dma_free_coherent(dwc->dev, sizeof(*dwc->ctrl_req), | |
2525 | dwc->ctrl_req, dwc->ctrl_req_addr); | |
2526 | ||
2527 | device_unregister(&dwc->gadget.dev); | |
2528 | } |