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perf python: Do not force closing original perf descriptor in evlist.get_pollfd()
[linux/fpc-iii.git] / drivers / usb / gadget / udc / fotg210-udc.c
blobbc6abaea907d88db2555afdd9549d1486a96498f
1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * FOTG210 UDC Driver supports Bulk transfer so far
4 *
5 * Copyright (C) 2013 Faraday Technology Corporation
6 *
7 * Author : Yuan-Hsin Chen <yhchen@faraday-tech.com>
8 */
9
10 #include <linux/dma-mapping.h>
11 #include <linux/err.h>
12 #include <linux/interrupt.h>
13 #include <linux/io.h>
14 #include <linux/module.h>
15 #include <linux/platform_device.h>
16 #include <linux/usb/ch9.h>
17 #include <linux/usb/gadget.h>
18
19 #include "fotg210.h"
20
21 #define DRIVER_DESC "FOTG210 USB Device Controller Driver"
22 #define DRIVER_VERSION "30-April-2013"
23
24 static const char udc_name[] = "fotg210_udc";
25 static const char * const fotg210_ep_name[] = {
26 "ep0", "ep1", "ep2", "ep3", "ep4"};
27
28 static void fotg210_disable_fifo_int(struct fotg210_ep *ep)
29 {
30 u32 value = ioread32(ep->fotg210->reg + FOTG210_DMISGR1);
31
32 if (ep->dir_in)
33 value |= DMISGR1_MF_IN_INT(ep->epnum - 1);
34 else
35 value |= DMISGR1_MF_OUTSPK_INT(ep->epnum - 1);
36 iowrite32(value, ep->fotg210->reg + FOTG210_DMISGR1);
37 }
38
39 static void fotg210_enable_fifo_int(struct fotg210_ep *ep)
40 {
41 u32 value = ioread32(ep->fotg210->reg + FOTG210_DMISGR1);
42
43 if (ep->dir_in)
44 value &= ~DMISGR1_MF_IN_INT(ep->epnum - 1);
45 else
46 value &= ~DMISGR1_MF_OUTSPK_INT(ep->epnum - 1);
47 iowrite32(value, ep->fotg210->reg + FOTG210_DMISGR1);
48 }
49
50 static void fotg210_set_cxdone(struct fotg210_udc *fotg210)
51 {
52 u32 value = ioread32(fotg210->reg + FOTG210_DCFESR);
53
54 value |= DCFESR_CX_DONE;
55 iowrite32(value, fotg210->reg + FOTG210_DCFESR);
56 }
57
58 static void fotg210_done(struct fotg210_ep *ep, struct fotg210_request *req,
59 int status)
60 {
61 list_del_init(&req->queue);
62
63 /* don't modify queue heads during completion callback */
64 if (ep->fotg210->gadget.speed == USB_SPEED_UNKNOWN)
65 req->req.status = -ESHUTDOWN;
66 else
67 req->req.status = status;
68
69 spin_unlock(&ep->fotg210->lock);
70 usb_gadget_giveback_request(&ep->ep, &req->req);
71 spin_lock(&ep->fotg210->lock);
72
73 if (ep->epnum) {
74 if (list_empty(&ep->queue))
75 fotg210_disable_fifo_int(ep);
76 } else {
77 fotg210_set_cxdone(ep->fotg210);
78 }
79 }
80
81 static void fotg210_fifo_ep_mapping(struct fotg210_ep *ep, u32 epnum,
82 u32 dir_in)
83 {
84 struct fotg210_udc *fotg210 = ep->fotg210;
85 u32 val;
86
87 /* Driver should map an ep to a fifo and then map the fifo
88 * to the ep. What a brain-damaged design!
89 */
90
91 /* map a fifo to an ep */
92 val = ioread32(fotg210->reg + FOTG210_EPMAP);
93 val &= ~EPMAP_FIFONOMSK(epnum, dir_in);
94 val |= EPMAP_FIFONO(epnum, dir_in);
95 iowrite32(val, fotg210->reg + FOTG210_EPMAP);
96
97 /* map the ep to the fifo */
98 val = ioread32(fotg210->reg + FOTG210_FIFOMAP);
99 val &= ~FIFOMAP_EPNOMSK(epnum);
100 val |= FIFOMAP_EPNO(epnum);
101 iowrite32(val, fotg210->reg + FOTG210_FIFOMAP);
102
103 /* enable fifo */
104 val = ioread32(fotg210->reg + FOTG210_FIFOCF);
105 val |= FIFOCF_FIFO_EN(epnum - 1);
106 iowrite32(val, fotg210->reg + FOTG210_FIFOCF);
107 }
108
109 static void fotg210_set_fifo_dir(struct fotg210_ep *ep, u32 epnum, u32 dir_in)
110 {
111 struct fotg210_udc *fotg210 = ep->fotg210;
112 u32 val;
113
114 val = ioread32(fotg210->reg + FOTG210_FIFOMAP);
115 val |= (dir_in ? FIFOMAP_DIRIN(epnum - 1) : FIFOMAP_DIROUT(epnum - 1));
116 iowrite32(val, fotg210->reg + FOTG210_FIFOMAP);
117 }
118
119 static void fotg210_set_tfrtype(struct fotg210_ep *ep, u32 epnum, u32 type)
120 {
121 struct fotg210_udc *fotg210 = ep->fotg210;
122 u32 val;
123
124 val = ioread32(fotg210->reg + FOTG210_FIFOCF);
125 val |= FIFOCF_TYPE(type, epnum - 1);
126 iowrite32(val, fotg210->reg + FOTG210_FIFOCF);
127 }
128
129 static void fotg210_set_mps(struct fotg210_ep *ep, u32 epnum, u32 mps,
130 u32 dir_in)
131 {
132 struct fotg210_udc *fotg210 = ep->fotg210;
133 u32 val;
134 u32 offset = dir_in ? FOTG210_INEPMPSR(epnum) :
135 FOTG210_OUTEPMPSR(epnum);
136
137 val = ioread32(fotg210->reg + offset);
138 val |= INOUTEPMPSR_MPS(mps);
139 iowrite32(val, fotg210->reg + offset);
140 }
141
142 static int fotg210_config_ep(struct fotg210_ep *ep,
143 const struct usb_endpoint_descriptor *desc)
144 {
145 struct fotg210_udc *fotg210 = ep->fotg210;
146
147 fotg210_set_fifo_dir(ep, ep->epnum, ep->dir_in);
148 fotg210_set_tfrtype(ep, ep->epnum, ep->type);
149 fotg210_set_mps(ep, ep->epnum, ep->ep.maxpacket, ep->dir_in);
150 fotg210_fifo_ep_mapping(ep, ep->epnum, ep->dir_in);
151
152 fotg210->ep[ep->epnum] = ep;
153
154 return 0;
155 }
156
157 static int fotg210_ep_enable(struct usb_ep *_ep,
158 const struct usb_endpoint_descriptor *desc)
159 {
160 struct fotg210_ep *ep;
161
162 ep = container_of(_ep, struct fotg210_ep, ep);
163
164 ep->desc = desc;
165 ep->epnum = usb_endpoint_num(desc);
166 ep->type = usb_endpoint_type(desc);
167 ep->dir_in = usb_endpoint_dir_in(desc);
168 ep->ep.maxpacket = usb_endpoint_maxp(desc);
169
170 return fotg210_config_ep(ep, desc);
171 }
172
173 static void fotg210_reset_tseq(struct fotg210_udc *fotg210, u8 epnum)
174 {
175 struct fotg210_ep *ep = fotg210->ep[epnum];
176 u32 value;
177 void __iomem *reg;
178
179 reg = (ep->dir_in) ?
180 fotg210->reg + FOTG210_INEPMPSR(epnum) :
181 fotg210->reg + FOTG210_OUTEPMPSR(epnum);
182
183 /* Note: Driver needs to set and clear INOUTEPMPSR_RESET_TSEQ
184 * bit. Controller wouldn't clear this bit. WTF!!!
185 */
186
187 value = ioread32(reg);
188 value |= INOUTEPMPSR_RESET_TSEQ;
189 iowrite32(value, reg);
190
191 value = ioread32(reg);
192 value &= ~INOUTEPMPSR_RESET_TSEQ;
193 iowrite32(value, reg);
194 }
195
196 static int fotg210_ep_release(struct fotg210_ep *ep)
197 {
198 if (!ep->epnum)
199 return 0;
200 ep->epnum = 0;
201 ep->stall = 0;
202 ep->wedged = 0;
203
204 fotg210_reset_tseq(ep->fotg210, ep->epnum);
205
206 return 0;
207 }
208
209 static int fotg210_ep_disable(struct usb_ep *_ep)
210 {
211 struct fotg210_ep *ep;
212 struct fotg210_request *req;
213 unsigned long flags;
214
215 BUG_ON(!_ep);
216
217 ep = container_of(_ep, struct fotg210_ep, ep);
218
219 while (!list_empty(&ep->queue)) {
220 req = list_entry(ep->queue.next,
221 struct fotg210_request, queue);
222 spin_lock_irqsave(&ep->fotg210->lock, flags);
223 fotg210_done(ep, req, -ECONNRESET);
224 spin_unlock_irqrestore(&ep->fotg210->lock, flags);
225 }
226
227 return fotg210_ep_release(ep);
228 }
229
230 static struct usb_request *fotg210_ep_alloc_request(struct usb_ep *_ep,
231 gfp_t gfp_flags)
232 {
233 struct fotg210_request *req;
234
235 req = kzalloc(sizeof(struct fotg210_request), gfp_flags);
236 if (!req)
237 return NULL;
238
239 INIT_LIST_HEAD(&req->queue);
240
241 return &req->req;
242 }
243
244 static void fotg210_ep_free_request(struct usb_ep *_ep,
245 struct usb_request *_req)
246 {
247 struct fotg210_request *req;
248
249 req = container_of(_req, struct fotg210_request, req);
250 kfree(req);
251 }
252
253 static void fotg210_enable_dma(struct fotg210_ep *ep,
254 dma_addr_t d, u32 len)
255 {
256 u32 value;
257 struct fotg210_udc *fotg210 = ep->fotg210;
258
259 /* set transfer length and direction */
260 value = ioread32(fotg210->reg + FOTG210_DMACPSR1);
261 value &= ~(DMACPSR1_DMA_LEN(0xFFFF) | DMACPSR1_DMA_TYPE(1));
262 value |= DMACPSR1_DMA_LEN(len) | DMACPSR1_DMA_TYPE(ep->dir_in);
263 iowrite32(value, fotg210->reg + FOTG210_DMACPSR1);
264
265 /* set device DMA target FIFO number */
266 value = ioread32(fotg210->reg + FOTG210_DMATFNR);
267 if (ep->epnum)
268 value |= DMATFNR_ACC_FN(ep->epnum - 1);
269 else
270 value |= DMATFNR_ACC_CXF;
271 iowrite32(value, fotg210->reg + FOTG210_DMATFNR);
272
273 /* set DMA memory address */
274 iowrite32(d, fotg210->reg + FOTG210_DMACPSR2);
275
276 /* enable MDMA_EROR and MDMA_CMPLT interrupt */
277 value = ioread32(fotg210->reg + FOTG210_DMISGR2);
278 value &= ~(DMISGR2_MDMA_CMPLT | DMISGR2_MDMA_ERROR);
279 iowrite32(value, fotg210->reg + FOTG210_DMISGR2);
280
281 /* start DMA */
282 value = ioread32(fotg210->reg + FOTG210_DMACPSR1);
283 value |= DMACPSR1_DMA_START;
284 iowrite32(value, fotg210->reg + FOTG210_DMACPSR1);
285 }
286
287 static void fotg210_disable_dma(struct fotg210_ep *ep)
288 {
289 iowrite32(DMATFNR_DISDMA, ep->fotg210->reg + FOTG210_DMATFNR);
290 }
291
292 static void fotg210_wait_dma_done(struct fotg210_ep *ep)
293 {
294 u32 value;
295
296 do {
297 value = ioread32(ep->fotg210->reg + FOTG210_DISGR2);
298 if ((value & DISGR2_USBRST_INT) ||
299 (value & DISGR2_DMA_ERROR))
300 goto dma_reset;
301 } while (!(value & DISGR2_DMA_CMPLT));
302
303 value &= ~DISGR2_DMA_CMPLT;
304 iowrite32(value, ep->fotg210->reg + FOTG210_DISGR2);
305 return;
306
307 dma_reset:
308 value = ioread32(ep->fotg210->reg + FOTG210_DMACPSR1);
309 value |= DMACPSR1_DMA_ABORT;
310 iowrite32(value, ep->fotg210->reg + FOTG210_DMACPSR1);
311
312 /* reset fifo */
313 if (ep->epnum) {
314 value = ioread32(ep->fotg210->reg +
315 FOTG210_FIBCR(ep->epnum - 1));
316 value |= FIBCR_FFRST;
317 iowrite32(value, ep->fotg210->reg +
318 FOTG210_FIBCR(ep->epnum - 1));
319 } else {
320 value = ioread32(ep->fotg210->reg + FOTG210_DCFESR);
321 value |= DCFESR_CX_CLR;
322 iowrite32(value, ep->fotg210->reg + FOTG210_DCFESR);
323 }
324 }
325
326 static void fotg210_start_dma(struct fotg210_ep *ep,
327 struct fotg210_request *req)
328 {
329 dma_addr_t d;
330 u8 *buffer;
331 u32 length;
332
333 if (ep->epnum) {
334 if (ep->dir_in) {
335 buffer = req->req.buf;
336 length = req->req.length;
337 } else {
338 buffer = req->req.buf + req->req.actual;
339 length = ioread32(ep->fotg210->reg +
340 FOTG210_FIBCR(ep->epnum - 1));
341 length &= FIBCR_BCFX;
342 }
343 } else {
344 buffer = req->req.buf + req->req.actual;
345 if (req->req.length - req->req.actual > ep->ep.maxpacket)
346 length = ep->ep.maxpacket;
347 else
348 length = req->req.length;
349 }
350
351 d = dma_map_single(NULL, buffer, length,
352 ep->dir_in ? DMA_TO_DEVICE : DMA_FROM_DEVICE);
353
354 if (dma_mapping_error(NULL, d)) {
355 pr_err("dma_mapping_error\n");
356 return;
357 }
358
359 dma_sync_single_for_device(NULL, d, length,
360 ep->dir_in ? DMA_TO_DEVICE :
361 DMA_FROM_DEVICE);
362
363 fotg210_enable_dma(ep, d, length);
364
365 /* check if dma is done */
366 fotg210_wait_dma_done(ep);
367
368 fotg210_disable_dma(ep);
369
370 /* update actual transfer length */
371 req->req.actual += length;
372
373 dma_unmap_single(NULL, d, length, DMA_TO_DEVICE);
374 }
375
376 static void fotg210_ep0_queue(struct fotg210_ep *ep,
377 struct fotg210_request *req)
378 {
379 if (!req->req.length) {
380 fotg210_done(ep, req, 0);
381 return;
382 }
383 if (ep->dir_in) { /* if IN */
384 fotg210_start_dma(ep, req);
385 if ((req->req.length == req->req.actual) ||
386 (req->req.actual < ep->ep.maxpacket))
387 fotg210_done(ep, req, 0);
388 } else { /* OUT */
389 u32 value = ioread32(ep->fotg210->reg + FOTG210_DMISGR0);
390
391 value &= ~DMISGR0_MCX_OUT_INT;
392 iowrite32(value, ep->fotg210->reg + FOTG210_DMISGR0);
393 }
394 }
395
396 static int fotg210_ep_queue(struct usb_ep *_ep, struct usb_request *_req,
397 gfp_t gfp_flags)
398 {
399 struct fotg210_ep *ep;
400 struct fotg210_request *req;
401 unsigned long flags;
402 int request = 0;
403
404 ep = container_of(_ep, struct fotg210_ep, ep);
405 req = container_of(_req, struct fotg210_request, req);
406
407 if (ep->fotg210->gadget.speed == USB_SPEED_UNKNOWN)
408 return -ESHUTDOWN;
409
410 spin_lock_irqsave(&ep->fotg210->lock, flags);
411
412 if (list_empty(&ep->queue))
413 request = 1;
414
415 list_add_tail(&req->queue, &ep->queue);
416
417 req->req.actual = 0;
418 req->req.status = -EINPROGRESS;
419
420 if (!ep->epnum) /* ep0 */
421 fotg210_ep0_queue(ep, req);
422 else if (request && !ep->stall)
423 fotg210_enable_fifo_int(ep);
424
425 spin_unlock_irqrestore(&ep->fotg210->lock, flags);
426
427 return 0;
428 }
429
430 static int fotg210_ep_dequeue(struct usb_ep *_ep, struct usb_request *_req)
431 {
432 struct fotg210_ep *ep;
433 struct fotg210_request *req;
434 unsigned long flags;
435
436 ep = container_of(_ep, struct fotg210_ep, ep);
437 req = container_of(_req, struct fotg210_request, req);
438
439 spin_lock_irqsave(&ep->fotg210->lock, flags);
440 if (!list_empty(&ep->queue))
441 fotg210_done(ep, req, -ECONNRESET);
442 spin_unlock_irqrestore(&ep->fotg210->lock, flags);
443
444 return 0;
445 }
446
447 static void fotg210_set_epnstall(struct fotg210_ep *ep)
448 {
449 struct fotg210_udc *fotg210 = ep->fotg210;
450 u32 value;
451 void __iomem *reg;
452
453 /* check if IN FIFO is empty before stall */
454 if (ep->dir_in) {
455 do {
456 value = ioread32(fotg210->reg + FOTG210_DCFESR);
457 } while (!(value & DCFESR_FIFO_EMPTY(ep->epnum - 1)));
458 }
459
460 reg = (ep->dir_in) ?
461 fotg210->reg + FOTG210_INEPMPSR(ep->epnum) :
462 fotg210->reg + FOTG210_OUTEPMPSR(ep->epnum);
463 value = ioread32(reg);
464 value |= INOUTEPMPSR_STL_EP;
465 iowrite32(value, reg);
466 }
467
468 static void fotg210_clear_epnstall(struct fotg210_ep *ep)
469 {
470 struct fotg210_udc *fotg210 = ep->fotg210;
471 u32 value;
472 void __iomem *reg;
473
474 reg = (ep->dir_in) ?
475 fotg210->reg + FOTG210_INEPMPSR(ep->epnum) :
476 fotg210->reg + FOTG210_OUTEPMPSR(ep->epnum);
477 value = ioread32(reg);
478 value &= ~INOUTEPMPSR_STL_EP;
479 iowrite32(value, reg);
480 }
481
482 static int fotg210_set_halt_and_wedge(struct usb_ep *_ep, int value, int wedge)
483 {
484 struct fotg210_ep *ep;
485 struct fotg210_udc *fotg210;
486 unsigned long flags;
487 int ret = 0;
488
489 ep = container_of(_ep, struct fotg210_ep, ep);
490
491 fotg210 = ep->fotg210;
492
493 spin_lock_irqsave(&ep->fotg210->lock, flags);
494
495 if (value) {
496 fotg210_set_epnstall(ep);
497 ep->stall = 1;
498 if (wedge)
499 ep->wedged = 1;
500 } else {
501 fotg210_reset_tseq(fotg210, ep->epnum);
502 fotg210_clear_epnstall(ep);
503 ep->stall = 0;
504 ep->wedged = 0;
505 if (!list_empty(&ep->queue))
506 fotg210_enable_fifo_int(ep);
507 }
508
509 spin_unlock_irqrestore(&ep->fotg210->lock, flags);
510 return ret;
511 }
512
513 static int fotg210_ep_set_halt(struct usb_ep *_ep, int value)
514 {
515 return fotg210_set_halt_and_wedge(_ep, value, 0);
516 }
517
518 static int fotg210_ep_set_wedge(struct usb_ep *_ep)
519 {
520 return fotg210_set_halt_and_wedge(_ep, 1, 1);
521 }
522
523 static void fotg210_ep_fifo_flush(struct usb_ep *_ep)
524 {
525 }
526
527 static const struct usb_ep_ops fotg210_ep_ops = {
528 .enable = fotg210_ep_enable,
529 .disable = fotg210_ep_disable,
530
531 .alloc_request = fotg210_ep_alloc_request,
532 .free_request = fotg210_ep_free_request,
533
534 .queue = fotg210_ep_queue,
535 .dequeue = fotg210_ep_dequeue,
536
537 .set_halt = fotg210_ep_set_halt,
538 .fifo_flush = fotg210_ep_fifo_flush,
539 .set_wedge = fotg210_ep_set_wedge,
540 };
541
542 static void fotg210_clear_tx0byte(struct fotg210_udc *fotg210)
543 {
544 u32 value = ioread32(fotg210->reg + FOTG210_TX0BYTE);
545
546 value &= ~(TX0BYTE_EP1 | TX0BYTE_EP2 | TX0BYTE_EP3
547 | TX0BYTE_EP4);
548 iowrite32(value, fotg210->reg + FOTG210_TX0BYTE);
549 }
550
551 static void fotg210_clear_rx0byte(struct fotg210_udc *fotg210)
552 {
553 u32 value = ioread32(fotg210->reg + FOTG210_RX0BYTE);
554
555 value &= ~(RX0BYTE_EP1 | RX0BYTE_EP2 | RX0BYTE_EP3
556 | RX0BYTE_EP4);
557 iowrite32(value, fotg210->reg + FOTG210_RX0BYTE);
558 }
559
560 /* read 8-byte setup packet only */
561 static void fotg210_rdsetupp(struct fotg210_udc *fotg210,
562 u8 *buffer)
563 {
564 int i = 0;
565 u8 *tmp = buffer;
566 u32 data;
567 u32 length = 8;
568
569 iowrite32(DMATFNR_ACC_CXF, fotg210->reg + FOTG210_DMATFNR);
570
571 for (i = (length >> 2); i > 0; i--) {
572 data = ioread32(fotg210->reg + FOTG210_CXPORT);
573 *tmp = data & 0xFF;
574 *(tmp + 1) = (data >> 8) & 0xFF;
575 *(tmp + 2) = (data >> 16) & 0xFF;
576 *(tmp + 3) = (data >> 24) & 0xFF;
577 tmp = tmp + 4;
578 }
579
580 switch (length % 4) {
581 case 1:
582 data = ioread32(fotg210->reg + FOTG210_CXPORT);
583 *tmp = data & 0xFF;
584 break;
585 case 2:
586 data = ioread32(fotg210->reg + FOTG210_CXPORT);
587 *tmp = data & 0xFF;
588 *(tmp + 1) = (data >> 8) & 0xFF;
589 break;
590 case 3:
591 data = ioread32(fotg210->reg + FOTG210_CXPORT);
592 *tmp = data & 0xFF;
593 *(tmp + 1) = (data >> 8) & 0xFF;
594 *(tmp + 2) = (data >> 16) & 0xFF;
595 break;
596 default:
597 break;
598 }
599
600 iowrite32(DMATFNR_DISDMA, fotg210->reg + FOTG210_DMATFNR);
601 }
602
603 static void fotg210_set_configuration(struct fotg210_udc *fotg210)
604 {
605 u32 value = ioread32(fotg210->reg + FOTG210_DAR);
606
607 value |= DAR_AFT_CONF;
608 iowrite32(value, fotg210->reg + FOTG210_DAR);
609 }
610
611 static void fotg210_set_dev_addr(struct fotg210_udc *fotg210, u32 addr)
612 {
613 u32 value = ioread32(fotg210->reg + FOTG210_DAR);
614
615 value |= (addr & 0x7F);
616 iowrite32(value, fotg210->reg + FOTG210_DAR);
617 }
618
619 static void fotg210_set_cxstall(struct fotg210_udc *fotg210)
620 {
621 u32 value = ioread32(fotg210->reg + FOTG210_DCFESR);
622
623 value |= DCFESR_CX_STL;
624 iowrite32(value, fotg210->reg + FOTG210_DCFESR);
625 }
626
627 static void fotg210_request_error(struct fotg210_udc *fotg210)
628 {
629 fotg210_set_cxstall(fotg210);
630 pr_err("request error!!\n");
631 }
632
633 static void fotg210_set_address(struct fotg210_udc *fotg210,
634 struct usb_ctrlrequest *ctrl)
635 {
636 if (ctrl->wValue >= 0x0100) {
637 fotg210_request_error(fotg210);
638 } else {
639 fotg210_set_dev_addr(fotg210, ctrl->wValue);
640 fotg210_set_cxdone(fotg210);
641 }
642 }
643
644 static void fotg210_set_feature(struct fotg210_udc *fotg210,
645 struct usb_ctrlrequest *ctrl)
646 {
647 switch (ctrl->bRequestType & USB_RECIP_MASK) {
648 case USB_RECIP_DEVICE:
649 fotg210_set_cxdone(fotg210);
650 break;
651 case USB_RECIP_INTERFACE:
652 fotg210_set_cxdone(fotg210);
653 break;
654 case USB_RECIP_ENDPOINT: {
655 u8 epnum;
656 epnum = le16_to_cpu(ctrl->wIndex) & USB_ENDPOINT_NUMBER_MASK;
657 if (epnum)
658 fotg210_set_epnstall(fotg210->ep[epnum]);
659 else
660 fotg210_set_cxstall(fotg210);
661 fotg210_set_cxdone(fotg210);
662 }
663 break;
664 default:
665 fotg210_request_error(fotg210);
666 break;
667 }
668 }
669
670 static void fotg210_clear_feature(struct fotg210_udc *fotg210,
671 struct usb_ctrlrequest *ctrl)
672 {
673 struct fotg210_ep *ep =
674 fotg210->ep[ctrl->wIndex & USB_ENDPOINT_NUMBER_MASK];
675
676 switch (ctrl->bRequestType & USB_RECIP_MASK) {
677 case USB_RECIP_DEVICE:
678 fotg210_set_cxdone(fotg210);
679 break;
680 case USB_RECIP_INTERFACE:
681 fotg210_set_cxdone(fotg210);
682 break;
683 case USB_RECIP_ENDPOINT:
684 if (ctrl->wIndex & USB_ENDPOINT_NUMBER_MASK) {
685 if (ep->wedged) {
686 fotg210_set_cxdone(fotg210);
687 break;
688 }
689 if (ep->stall)
690 fotg210_set_halt_and_wedge(&ep->ep, 0, 0);
691 }
692 fotg210_set_cxdone(fotg210);
693 break;
694 default:
695 fotg210_request_error(fotg210);
696 break;
697 }
698 }
699
700 static int fotg210_is_epnstall(struct fotg210_ep *ep)
701 {
702 struct fotg210_udc *fotg210 = ep->fotg210;
703 u32 value;
704 void __iomem *reg;
705
706 reg = (ep->dir_in) ?
707 fotg210->reg + FOTG210_INEPMPSR(ep->epnum) :
708 fotg210->reg + FOTG210_OUTEPMPSR(ep->epnum);
709 value = ioread32(reg);
710 return value & INOUTEPMPSR_STL_EP ? 1 : 0;
711 }
712
713 static void fotg210_get_status(struct fotg210_udc *fotg210,
714 struct usb_ctrlrequest *ctrl)
715 {
716 u8 epnum;
717
718 switch (ctrl->bRequestType & USB_RECIP_MASK) {
719 case USB_RECIP_DEVICE:
720 fotg210->ep0_data = 1 << USB_DEVICE_SELF_POWERED;
721 break;
722 case USB_RECIP_INTERFACE:
723 fotg210->ep0_data = 0;
724 break;
725 case USB_RECIP_ENDPOINT:
726 epnum = ctrl->wIndex & USB_ENDPOINT_NUMBER_MASK;
727 if (epnum)
728 fotg210->ep0_data =
729 fotg210_is_epnstall(fotg210->ep[epnum])
730 << USB_ENDPOINT_HALT;
731 else
732 fotg210_request_error(fotg210);
733 break;
734
735 default:
736 fotg210_request_error(fotg210);
737 return; /* exit */
738 }
739
740 fotg210->ep0_req->buf = &fotg210->ep0_data;
741 fotg210->ep0_req->length = 2;
742
743 spin_unlock(&fotg210->lock);
744 fotg210_ep_queue(fotg210->gadget.ep0, fotg210->ep0_req, GFP_ATOMIC);
745 spin_lock(&fotg210->lock);
746 }
747
748 static int fotg210_setup_packet(struct fotg210_udc *fotg210,
749 struct usb_ctrlrequest *ctrl)
750 {
751 u8 *p = (u8 *)ctrl;
752 u8 ret = 0;
753
754 fotg210_rdsetupp(fotg210, p);
755
756 fotg210->ep[0]->dir_in = ctrl->bRequestType & USB_DIR_IN;
757
758 if (fotg210->gadget.speed == USB_SPEED_UNKNOWN) {
759 u32 value = ioread32(fotg210->reg + FOTG210_DMCR);
760 fotg210->gadget.speed = value & DMCR_HS_EN ?
761 USB_SPEED_HIGH : USB_SPEED_FULL;
762 }
763
764 /* check request */
765 if ((ctrl->bRequestType & USB_TYPE_MASK) == USB_TYPE_STANDARD) {
766 switch (ctrl->bRequest) {
767 case USB_REQ_GET_STATUS:
768 fotg210_get_status(fotg210, ctrl);
769 break;
770 case USB_REQ_CLEAR_FEATURE:
771 fotg210_clear_feature(fotg210, ctrl);
772 break;
773 case USB_REQ_SET_FEATURE:
774 fotg210_set_feature(fotg210, ctrl);
775 break;
776 case USB_REQ_SET_ADDRESS:
777 fotg210_set_address(fotg210, ctrl);
778 break;
779 case USB_REQ_SET_CONFIGURATION:
780 fotg210_set_configuration(fotg210);
781 ret = 1;
782 break;
783 default:
784 ret = 1;
785 break;
786 }
787 } else {
788 ret = 1;
789 }
790
791 return ret;
792 }
793
794 static void fotg210_ep0out(struct fotg210_udc *fotg210)
795 {
796 struct fotg210_ep *ep = fotg210->ep[0];
797
798 if (!list_empty(&ep->queue) && !ep->dir_in) {
799 struct fotg210_request *req;
800
801 req = list_first_entry(&ep->queue,
802 struct fotg210_request, queue);
803
804 if (req->req.length)
805 fotg210_start_dma(ep, req);
806
807 if ((req->req.length - req->req.actual) < ep->ep.maxpacket)
808 fotg210_done(ep, req, 0);
809 } else {
810 pr_err("%s : empty queue\n", __func__);
811 }
812 }
813
814 static void fotg210_ep0in(struct fotg210_udc *fotg210)
815 {
816 struct fotg210_ep *ep = fotg210->ep[0];
817
818 if ((!list_empty(&ep->queue)) && (ep->dir_in)) {
819 struct fotg210_request *req;
820
821 req = list_entry(ep->queue.next,
822 struct fotg210_request, queue);
823
824 if (req->req.length)
825 fotg210_start_dma(ep, req);
826
827 if ((req->req.length - req->req.actual) < ep->ep.maxpacket)
828 fotg210_done(ep, req, 0);
829 } else {
830 fotg210_set_cxdone(fotg210);
831 }
832 }
833
834 static void fotg210_clear_comabt_int(struct fotg210_udc *fotg210)
835 {
836 u32 value = ioread32(fotg210->reg + FOTG210_DISGR0);
837
838 value &= ~DISGR0_CX_COMABT_INT;
839 iowrite32(value, fotg210->reg + FOTG210_DISGR0);
840 }
841
842 static void fotg210_in_fifo_handler(struct fotg210_ep *ep)
843 {
844 struct fotg210_request *req = list_entry(ep->queue.next,
845 struct fotg210_request, queue);
846
847 if (req->req.length)
848 fotg210_start_dma(ep, req);
849 fotg210_done(ep, req, 0);
850 }
851
852 static void fotg210_out_fifo_handler(struct fotg210_ep *ep)
853 {
854 struct fotg210_request *req = list_entry(ep->queue.next,
855 struct fotg210_request, queue);
856
857 fotg210_start_dma(ep, req);
858
859 /* finish out transfer */
860 if (req->req.length == req->req.actual ||
861 req->req.actual < ep->ep.maxpacket)
862 fotg210_done(ep, req, 0);
863 }
864
865 static irqreturn_t fotg210_irq(int irq, void *_fotg210)
866 {
867 struct fotg210_udc *fotg210 = _fotg210;
868 u32 int_grp = ioread32(fotg210->reg + FOTG210_DIGR);
869 u32 int_msk = ioread32(fotg210->reg + FOTG210_DMIGR);
870
871 int_grp &= ~int_msk;
872
873 spin_lock(&fotg210->lock);
874
875 if (int_grp & DIGR_INT_G2) {
876 void __iomem *reg = fotg210->reg + FOTG210_DISGR2;
877 u32 int_grp2 = ioread32(reg);
878 u32 int_msk2 = ioread32(fotg210->reg + FOTG210_DMISGR2);
879 u32 value;
880
881 int_grp2 &= ~int_msk2;
882
883 if (int_grp2 & DISGR2_USBRST_INT) {
884 value = ioread32(reg);
885 value &= ~DISGR2_USBRST_INT;
886 iowrite32(value, reg);
887 pr_info("fotg210 udc reset\n");
888 }
889 if (int_grp2 & DISGR2_SUSP_INT) {
890 value = ioread32(reg);
891 value &= ~DISGR2_SUSP_INT;
892 iowrite32(value, reg);
893 pr_info("fotg210 udc suspend\n");
894 }
895 if (int_grp2 & DISGR2_RESM_INT) {
896 value = ioread32(reg);
897 value &= ~DISGR2_RESM_INT;
898 iowrite32(value, reg);
899 pr_info("fotg210 udc resume\n");
900 }
901 if (int_grp2 & DISGR2_ISO_SEQ_ERR_INT) {
902 value = ioread32(reg);
903 value &= ~DISGR2_ISO_SEQ_ERR_INT;
904 iowrite32(value, reg);
905 pr_info("fotg210 iso sequence error\n");
906 }
907 if (int_grp2 & DISGR2_ISO_SEQ_ABORT_INT) {
908 value = ioread32(reg);
909 value &= ~DISGR2_ISO_SEQ_ABORT_INT;
910 iowrite32(value, reg);
911 pr_info("fotg210 iso sequence abort\n");
912 }
913 if (int_grp2 & DISGR2_TX0BYTE_INT) {
914 fotg210_clear_tx0byte(fotg210);
915 value = ioread32(reg);
916 value &= ~DISGR2_TX0BYTE_INT;
917 iowrite32(value, reg);
918 pr_info("fotg210 transferred 0 byte\n");
919 }
920 if (int_grp2 & DISGR2_RX0BYTE_INT) {
921 fotg210_clear_rx0byte(fotg210);
922 value = ioread32(reg);
923 value &= ~DISGR2_RX0BYTE_INT;
924 iowrite32(value, reg);
925 pr_info("fotg210 received 0 byte\n");
926 }
927 if (int_grp2 & DISGR2_DMA_ERROR) {
928 value = ioread32(reg);
929 value &= ~DISGR2_DMA_ERROR;
930 iowrite32(value, reg);
931 }
932 }
933
934 if (int_grp & DIGR_INT_G0) {
935 void __iomem *reg = fotg210->reg + FOTG210_DISGR0;
936 u32 int_grp0 = ioread32(reg);
937 u32 int_msk0 = ioread32(fotg210->reg + FOTG210_DMISGR0);
938 struct usb_ctrlrequest ctrl;
939
940 int_grp0 &= ~int_msk0;
941
942 /* the highest priority in this source register */
943 if (int_grp0 & DISGR0_CX_COMABT_INT) {
944 fotg210_clear_comabt_int(fotg210);
945 pr_info("fotg210 CX command abort\n");
946 }
947
948 if (int_grp0 & DISGR0_CX_SETUP_INT) {
949 if (fotg210_setup_packet(fotg210, &ctrl)) {
950 spin_unlock(&fotg210->lock);
951 if (fotg210->driver->setup(&fotg210->gadget,
952 &ctrl) < 0)
953 fotg210_set_cxstall(fotg210);
954 spin_lock(&fotg210->lock);
955 }
956 }
957 if (int_grp0 & DISGR0_CX_COMEND_INT)
958 pr_info("fotg210 cmd end\n");
959
960 if (int_grp0 & DISGR0_CX_IN_INT)
961 fotg210_ep0in(fotg210);
962
963 if (int_grp0 & DISGR0_CX_OUT_INT)
964 fotg210_ep0out(fotg210);
965
966 if (int_grp0 & DISGR0_CX_COMFAIL_INT) {
967 fotg210_set_cxstall(fotg210);
968 pr_info("fotg210 ep0 fail\n");
969 }
970 }
971
972 if (int_grp & DIGR_INT_G1) {
973 void __iomem *reg = fotg210->reg + FOTG210_DISGR1;
974 u32 int_grp1 = ioread32(reg);
975 u32 int_msk1 = ioread32(fotg210->reg + FOTG210_DMISGR1);
976 int fifo;
977
978 int_grp1 &= ~int_msk1;
979
980 for (fifo = 0; fifo < FOTG210_MAX_FIFO_NUM; fifo++) {
981 if (int_grp1 & DISGR1_IN_INT(fifo))
982 fotg210_in_fifo_handler(fotg210->ep[fifo + 1]);
983
984 if ((int_grp1 & DISGR1_OUT_INT(fifo)) ||
985 (int_grp1 & DISGR1_SPK_INT(fifo)))
986 fotg210_out_fifo_handler(fotg210->ep[fifo + 1]);
987 }
988 }
989
990 spin_unlock(&fotg210->lock);
991
992 return IRQ_HANDLED;
993 }
994
995 static void fotg210_disable_unplug(struct fotg210_udc *fotg210)
996 {
997 u32 reg = ioread32(fotg210->reg + FOTG210_PHYTMSR);
998
999 reg &= ~PHYTMSR_UNPLUG;
1000 iowrite32(reg, fotg210->reg + FOTG210_PHYTMSR);
1001 }
1002
1003 static int fotg210_udc_start(struct usb_gadget *g,
1004 struct usb_gadget_driver *driver)
1005 {
1006 struct fotg210_udc *fotg210 = gadget_to_fotg210(g);
1007 u32 value;
1008
1009 /* hook up the driver */
1010 driver->driver.bus = NULL;
1011 fotg210->driver = driver;
1012
1013 /* enable device global interrupt */
1014 value = ioread32(fotg210->reg + FOTG210_DMCR);
1015 value |= DMCR_GLINT_EN;
1016 iowrite32(value, fotg210->reg + FOTG210_DMCR);
1017
1018 return 0;
1019 }
1020
1021 static void fotg210_init(struct fotg210_udc *fotg210)
1022 {
1023 u32 value;
1024
1025 /* disable global interrupt and set int polarity to active high */
1026 iowrite32(GMIR_MHC_INT | GMIR_MOTG_INT | GMIR_INT_POLARITY,
1027 fotg210->reg + FOTG210_GMIR);
1028
1029 /* disable device global interrupt */
1030 value = ioread32(fotg210->reg + FOTG210_DMCR);
1031 value &= ~DMCR_GLINT_EN;
1032 iowrite32(value, fotg210->reg + FOTG210_DMCR);
1033
1034 /* disable all fifo interrupt */
1035 iowrite32(~(u32)0, fotg210->reg + FOTG210_DMISGR1);
1036
1037 /* disable cmd end */
1038 value = ioread32(fotg210->reg + FOTG210_DMISGR0);
1039 value |= DMISGR0_MCX_COMEND;
1040 iowrite32(value, fotg210->reg + FOTG210_DMISGR0);
1041 }
1042
1043 static int fotg210_udc_stop(struct usb_gadget *g)
1044 {
1045 struct fotg210_udc *fotg210 = gadget_to_fotg210(g);
1046 unsigned long flags;
1047
1048 spin_lock_irqsave(&fotg210->lock, flags);
1049
1050 fotg210_init(fotg210);
1051 fotg210->driver = NULL;
1052
1053 spin_unlock_irqrestore(&fotg210->lock, flags);
1054
1055 return 0;
1056 }
1057
1058 static const struct usb_gadget_ops fotg210_gadget_ops = {
1059 .udc_start = fotg210_udc_start,
1060 .udc_stop = fotg210_udc_stop,
1061 };
1062
1063 static int fotg210_udc_remove(struct platform_device *pdev)
1064 {
1065 struct fotg210_udc *fotg210 = platform_get_drvdata(pdev);
1066 int i;
1067
1068 usb_del_gadget_udc(&fotg210->gadget);
1069 iounmap(fotg210->reg);
1070 free_irq(platform_get_irq(pdev, 0), fotg210);
1071
1072 fotg210_ep_free_request(&fotg210->ep[0]->ep, fotg210->ep0_req);
1073 for (i = 0; i < FOTG210_MAX_NUM_EP; i++)
1074 kfree(fotg210->ep[i]);
1075 kfree(fotg210);
1076
1077 return 0;
1078 }
1079
1080 static int fotg210_udc_probe(struct platform_device *pdev)
1081 {
1082 struct resource *res, *ires;
1083 struct fotg210_udc *fotg210 = NULL;
1084 struct fotg210_ep *_ep[FOTG210_MAX_NUM_EP];
1085 int ret = 0;
1086 int i;
1087
1088 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1089 if (!res) {
1090 pr_err("platform_get_resource error.\n");
1091 return -ENODEV;
1092 }
1093
1094 ires = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
1095 if (!ires) {
1096 pr_err("platform_get_resource IORESOURCE_IRQ error.\n");
1097 return -ENODEV;
1098 }
1099
1100 ret = -ENOMEM;
1101
1102 /* initialize udc */
1103 fotg210 = kzalloc(sizeof(struct fotg210_udc), GFP_KERNEL);
1104 if (fotg210 == NULL)
1105 goto err;
1106
1107 for (i = 0; i < FOTG210_MAX_NUM_EP; i++) {
1108 _ep[i] = kzalloc(sizeof(struct fotg210_ep), GFP_KERNEL);
1109 if (_ep[i] == NULL)
1110 goto err_alloc;
1111 fotg210->ep[i] = _ep[i];
1112 }
1113
1114 fotg210->reg = ioremap(res->start, resource_size(res));
1115 if (fotg210->reg == NULL) {
1116 pr_err("ioremap error.\n");
1117 goto err_alloc;
1118 }
1119
1120 spin_lock_init(&fotg210->lock);
1121
1122 platform_set_drvdata(pdev, fotg210);
1123
1124 fotg210->gadget.ops = &fotg210_gadget_ops;
1125
1126 fotg210->gadget.max_speed = USB_SPEED_HIGH;
1127 fotg210->gadget.dev.parent = &pdev->dev;
1128 fotg210->gadget.dev.dma_mask = pdev->dev.dma_mask;
1129 fotg210->gadget.name = udc_name;
1130
1131 INIT_LIST_HEAD(&fotg210->gadget.ep_list);
1132
1133 for (i = 0; i < FOTG210_MAX_NUM_EP; i++) {
1134 struct fotg210_ep *ep = fotg210->ep[i];
1135
1136 if (i) {
1137 INIT_LIST_HEAD(&fotg210->ep[i]->ep.ep_list);
1138 list_add_tail(&fotg210->ep[i]->ep.ep_list,
1139 &fotg210->gadget.ep_list);
1140 }
1141 ep->fotg210 = fotg210;
1142 INIT_LIST_HEAD(&ep->queue);
1143 ep->ep.name = fotg210_ep_name[i];
1144 ep->ep.ops = &fotg210_ep_ops;
1145 usb_ep_set_maxpacket_limit(&ep->ep, (unsigned short) ~0);
1146
1147 if (i == 0) {
1148 ep->ep.caps.type_control = true;
1149 } else {
1150 ep->ep.caps.type_iso = true;
1151 ep->ep.caps.type_bulk = true;
1152 ep->ep.caps.type_int = true;
1153 }
1154
1155 ep->ep.caps.dir_in = true;
1156 ep->ep.caps.dir_out = true;
1157 }
1158 usb_ep_set_maxpacket_limit(&fotg210->ep[0]->ep, 0x40);
1159 fotg210->gadget.ep0 = &fotg210->ep[0]->ep;
1160 INIT_LIST_HEAD(&fotg210->gadget.ep0->ep_list);
1161
1162 fotg210->ep0_req = fotg210_ep_alloc_request(&fotg210->ep[0]->ep,
1163 GFP_KERNEL);
1164 if (fotg210->ep0_req == NULL)
1165 goto err_map;
1166
1167 fotg210_init(fotg210);
1168
1169 fotg210_disable_unplug(fotg210);
1170
1171 ret = request_irq(ires->start, fotg210_irq, IRQF_SHARED,
1172 udc_name, fotg210);
1173 if (ret < 0) {
1174 pr_err("request_irq error (%d)\n", ret);
1175 goto err_req;
1176 }
1177
1178 ret = usb_add_gadget_udc(&pdev->dev, &fotg210->gadget);
1179 if (ret)
1180 goto err_add_udc;
1181
1182 dev_info(&pdev->dev, "version %s\n", DRIVER_VERSION);
1183
1184 return 0;
1185
1186 err_add_udc:
1187 free_irq(ires->start, fotg210);
1188
1189 err_req:
1190 fotg210_ep_free_request(&fotg210->ep[0]->ep, fotg210->ep0_req);
1191
1192 err_map:
1193 iounmap(fotg210->reg);
1194
1195 err_alloc:
1196 for (i = 0; i < FOTG210_MAX_NUM_EP; i++)
1197 kfree(fotg210->ep[i]);
1198 kfree(fotg210);
1199
1200 err:
1201 return ret;
1202 }
1203
1204 static struct platform_driver fotg210_driver = {
1205 .driver = {
1206 .name = (char *)udc_name,
1207 },
1208 .probe = fotg210_udc_probe,
1209 .remove = fotg210_udc_remove,
1210 };
1211
1212 module_platform_driver(fotg210_driver);
1213
1214 MODULE_AUTHOR("Yuan-Hsin Chen, Feng-Hsin Chiang <john453@faraday-tech.com>");
1215 MODULE_LICENSE("GPL");
1216 MODULE_DESCRIPTION(DRIVER_DESC);
Linux with added FPC-III support