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[u-boot/qq2440-u-boot.git] / drivers / usb / gadget / fotg210.c
blob3acf6a1f41dfd35897d84262871c71f5203e1de3
1 /*
2 * Faraday USB 2.0 OTG Controller
3 *
4 * (C) Copyright 2010 Faraday Technology
5 * Dante Su <dantesu@faraday-tech.com>
6 *
7 * SPDX-License-Identifier: GPL-2.0+
8 */
9
10 #include <common.h>
11 #include <command.h>
12 #include <config.h>
13 #include <net.h>
14 #include <malloc.h>
15 #include <asm/io.h>
16 #include <asm/errno.h>
17 #include <linux/types.h>
18 #include <linux/usb/ch9.h>
19 #include <linux/usb/gadget.h>
20
21 #include <usb/fotg210.h>
22
23 #define CFG_NUM_ENDPOINTS 4
24 #define CFG_EP0_MAX_PACKET_SIZE 64
25 #define CFG_EPX_MAX_PACKET_SIZE 512
26
27 #define CFG_CMD_TIMEOUT (CONFIG_SYS_HZ >> 2) /* 250 ms */
28
29 struct fotg210_chip;
30
31 struct fotg210_ep {
32 struct usb_ep ep;
33
34 uint maxpacket;
35 uint id;
36 uint stopped;
37
38 struct list_head queue;
39 struct fotg210_chip *chip;
40 const struct usb_endpoint_descriptor *desc;
41 };
42
43 struct fotg210_request {
44 struct usb_request req;
45 struct list_head queue;
46 struct fotg210_ep *ep;
47 };
48
49 struct fotg210_chip {
50 struct usb_gadget gadget;
51 struct usb_gadget_driver *driver;
52 struct fotg210_regs *regs;
53 uint8_t irq;
54 uint16_t addr;
55 int pullup;
56 enum usb_device_state state;
57 struct fotg210_ep ep[1 + CFG_NUM_ENDPOINTS];
58 };
59
60 static struct usb_endpoint_descriptor ep0_desc = {
61 .bLength = sizeof(struct usb_endpoint_descriptor),
62 .bDescriptorType = USB_DT_ENDPOINT,
63 .bEndpointAddress = USB_DIR_IN,
64 .bmAttributes = USB_ENDPOINT_XFER_CONTROL,
65 };
66
67 static inline int fifo_to_ep(struct fotg210_chip *chip, int id, int in)
68 {
69 return (id < 0) ? 0 : ((id & 0x03) + 1);
70 }
71
72 static inline int ep_to_fifo(struct fotg210_chip *chip, int id)
73 {
74 return (id <= 0) ? -1 : ((id - 1) & 0x03);
75 }
76
77 static inline int ep_reset(struct fotg210_chip *chip, uint8_t ep_addr)
78 {
79 int ep = ep_addr & USB_ENDPOINT_NUMBER_MASK;
80 struct fotg210_regs *regs = chip->regs;
81
82 if (ep_addr & USB_DIR_IN) {
83 /* reset endpoint */
84 setbits_le32(&regs->iep[ep - 1], IEP_RESET);
85 mdelay(1);
86 clrbits_le32(&regs->iep[ep - 1], IEP_RESET);
87 /* clear endpoint stall */
88 clrbits_le32(&regs->iep[ep - 1], IEP_STALL);
89 } else {
90 /* reset endpoint */
91 setbits_le32(&regs->oep[ep - 1], OEP_RESET);
92 mdelay(1);
93 clrbits_le32(&regs->oep[ep - 1], OEP_RESET);
94 /* clear endpoint stall */
95 clrbits_le32(&regs->oep[ep - 1], OEP_STALL);
96 }
97
98 return 0;
99 }
100
101 static int fotg210_reset(struct fotg210_chip *chip)
102 {
103 struct fotg210_regs *regs = chip->regs;
104 uint32_t i;
105
106 chip->state = USB_STATE_POWERED;
107
108 /* chip enable */
109 writel(DEVCTRL_EN, &regs->dev_ctrl);
110
111 /* device address reset */
112 chip->addr = 0;
113 writel(0, &regs->dev_addr);
114
115 /* set idle counter to 7ms */
116 writel(7, &regs->idle);
117
118 /* disable all interrupts */
119 writel(IMR_MASK, &regs->imr);
120 writel(GIMR_MASK, &regs->gimr);
121 writel(GIMR0_MASK, &regs->gimr0);
122 writel(GIMR1_MASK, &regs->gimr1);
123 writel(GIMR2_MASK, &regs->gimr2);
124
125 /* clear interrupts */
126 writel(ISR_MASK, &regs->isr);
127 writel(0, &regs->gisr);
128 writel(0, &regs->gisr0);
129 writel(0, &regs->gisr1);
130 writel(0, &regs->gisr2);
131
132 /* chip reset */
133 setbits_le32(&regs->dev_ctrl, DEVCTRL_RESET);
134 mdelay(10);
135 if (readl(&regs->dev_ctrl) & DEVCTRL_RESET) {
136 printf("fotg210: chip reset failed\n");
137 return -1;
138 }
139
140 /* CX FIFO reset */
141 setbits_le32(&regs->cxfifo, CXFIFO_CXFIFOCLR);
142 mdelay(10);
143 if (readl(&regs->cxfifo) & CXFIFO_CXFIFOCLR) {
144 printf("fotg210: ep0 fifo reset failed\n");
145 return -1;
146 }
147
148 /* create static ep-fifo map (EP1 <-> FIFO0, EP2 <-> FIFO1 ...) */
149 writel(EPMAP14_DEFAULT, &regs->epmap14);
150 writel(EPMAP58_DEFAULT, &regs->epmap58);
151 writel(FIFOMAP_DEFAULT, &regs->fifomap);
152 writel(0, &regs->fifocfg);
153 for (i = 0; i < 8; ++i) {
154 writel(CFG_EPX_MAX_PACKET_SIZE, &regs->iep[i]);
155 writel(CFG_EPX_MAX_PACKET_SIZE, &regs->oep[i]);
156 }
157
158 /* FIFO reset */
159 for (i = 0; i < 4; ++i) {
160 writel(FIFOCSR_RESET, &regs->fifocsr[i]);
161 mdelay(10);
162 if (readl(&regs->fifocsr[i]) & FIFOCSR_RESET) {
163 printf("fotg210: fifo%d reset failed\n", i);
164 return -1;
165 }
166 }
167
168 /* enable only device interrupt and triggered at level-high */
169 writel(IMR_IRQLH | IMR_HOST | IMR_OTG, &regs->imr);
170 writel(ISR_MASK, &regs->isr);
171 /* disable EP0 IN/OUT interrupt */
172 writel(GIMR0_CXOUT | GIMR0_CXIN, &regs->gimr0);
173 /* disable EPX IN+SPK+OUT interrupts */
174 writel(GIMR1_MASK, &regs->gimr1);
175 /* disable wakeup+idle+dma+zlp interrupts */
176 writel(GIMR2_WAKEUP | GIMR2_IDLE | GIMR2_DMAERR | GIMR2_DMAFIN
177 | GIMR2_ZLPRX | GIMR2_ZLPTX, &regs->gimr2);
178 /* enable all group interrupt */
179 writel(0, &regs->gimr);
180
181 /* suspend delay = 3 ms */
182 writel(3, &regs->idle);
183
184 /* turn-on device interrupts */
185 setbits_le32(&regs->dev_ctrl, DEVCTRL_GIRQ_EN);
186
187 return 0;
188 }
189
190 static inline int fotg210_cxwait(struct fotg210_chip *chip, uint32_t mask)
191 {
192 struct fotg210_regs *regs = chip->regs;
193 int ret = -1;
194 ulong ts;
195
196 for (ts = get_timer(0); get_timer(ts) < CFG_CMD_TIMEOUT; ) {
197 if ((readl(&regs->cxfifo) & mask) != mask)
198 continue;
199 ret = 0;
200 break;
201 }
202
203 if (ret)
204 printf("fotg210: cx/ep0 timeout\n");
205
206 return ret;
207 }
208
209 static int fotg210_dma(struct fotg210_ep *ep, struct fotg210_request *req)
210 {
211 struct fotg210_chip *chip = ep->chip;
212 struct fotg210_regs *regs = chip->regs;
213 uint32_t tmp, ts;
214 uint8_t *buf = req->req.buf + req->req.actual;
215 uint32_t len = req->req.length - req->req.actual;
216 int fifo = ep_to_fifo(chip, ep->id);
217 int ret = -EBUSY;
218
219 /* 1. init dma buffer */
220 if (len > ep->maxpacket)
221 len = ep->maxpacket;
222
223 /* 2. wait for dma ready (hardware) */
224 for (ts = get_timer(0); get_timer(ts) < CFG_CMD_TIMEOUT; ) {
225 if (!(readl(&regs->dma_ctrl) & DMACTRL_START)) {
226 ret = 0;
227 break;
228 }
229 }
230 if (ret) {
231 printf("fotg210: dma busy\n");
232 req->req.status = ret;
233 return ret;
234 }
235
236 /* 3. DMA target setup */
237 if (ep->desc->bEndpointAddress & USB_DIR_IN)
238 flush_dcache_range((ulong)buf, (ulong)buf + len);
239 else
240 invalidate_dcache_range((ulong)buf, (ulong)buf + len);
241
242 writel(virt_to_phys(buf), &regs->dma_addr);
243
244 if (ep->desc->bEndpointAddress & USB_DIR_IN) {
245 if (ep->id == 0) {
246 /* Wait until cx/ep0 fifo empty */
247 fotg210_cxwait(chip, CXFIFO_CXFIFOE);
248 udelay(1);
249 writel(DMAFIFO_CX, &regs->dma_fifo);
250 } else {
251 /* Wait until epx fifo empty */
252 fotg210_cxwait(chip, CXFIFO_FIFOE(fifo));
253 writel(DMAFIFO_FIFO(fifo), &regs->dma_fifo);
254 }
255 writel(DMACTRL_LEN(len) | DMACTRL_MEM2FIFO, &regs->dma_ctrl);
256 } else {
257 uint32_t blen;
258
259 if (ep->id == 0) {
260 writel(DMAFIFO_CX, &regs->dma_fifo);
261 do {
262 blen = CXFIFO_BYTES(readl(&regs->cxfifo));
263 } while (blen < len);
264 } else {
265 writel(DMAFIFO_FIFO(fifo), &regs->dma_fifo);
266 blen = FIFOCSR_BYTES(readl(&regs->fifocsr[fifo]));
267 }
268 len = (len < blen) ? len : blen;
269 writel(DMACTRL_LEN(len) | DMACTRL_FIFO2MEM, &regs->dma_ctrl);
270 }
271
272 /* 4. DMA start */
273 setbits_le32(&regs->dma_ctrl, DMACTRL_START);
274
275 /* 5. DMA wait */
276 ret = -EBUSY;
277 for (ts = get_timer(0); get_timer(ts) < CFG_CMD_TIMEOUT; ) {
278 tmp = readl(&regs->gisr2);
279 /* DMA complete */
280 if (tmp & GISR2_DMAFIN) {
281 ret = 0;
282 break;
283 }
284 /* DMA error */
285 if (tmp & GISR2_DMAERR) {
286 printf("fotg210: dma error\n");
287 break;
288 }
289 /* resume, suspend, reset */
290 if (tmp & (GISR2_RESUME | GISR2_SUSPEND | GISR2_RESET)) {
291 printf("fotg210: dma reset by host\n");
292 break;
293 }
294 }
295
296 /* 7. DMA target reset */
297 if (ret)
298 writel(DMACTRL_ABORT | DMACTRL_CLRFF, &regs->dma_ctrl);
299
300 writel(0, &regs->gisr2);
301 writel(0, &regs->dma_fifo);
302
303 req->req.status = ret;
304 if (!ret)
305 req->req.actual += len;
306 else
307 printf("fotg210: ep%d dma error(code=%d)\n", ep->id, ret);
308
309 return len;
310 }
311
312 /*
313 * result of setup packet
314 */
315 #define CX_IDLE 0
316 #define CX_FINISH 1
317 #define CX_STALL 2
318
319 static void fotg210_setup(struct fotg210_chip *chip)
320 {
321 int id, ret = CX_IDLE;
322 uint32_t tmp[2];
323 struct usb_ctrlrequest *req = (struct usb_ctrlrequest *)tmp;
324 struct fotg210_regs *regs = chip->regs;
325
326 /*
327 * If this is the first Cx 8 byte command,
328 * we can now query USB mode (high/full speed; USB 2.0/USB 1.0)
329 */
330 if (chip->state == USB_STATE_POWERED) {
331 chip->state = USB_STATE_DEFAULT;
332 if (readl(&regs->otgcsr) & OTGCSR_DEV_B) {
333 /* Mini-B */
334 if (readl(&regs->dev_ctrl) & DEVCTRL_HS) {
335 puts("fotg210: HS\n");
336 chip->gadget.speed = USB_SPEED_HIGH;
337 /* SOF mask timer = 1100 ticks */
338 writel(SOFMTR_TMR(1100), &regs->sof_mtr);
339 } else {
340 puts("fotg210: FS\n");
341 chip->gadget.speed = USB_SPEED_FULL;
342 /* SOF mask timer = 10000 ticks */
343 writel(SOFMTR_TMR(10000), &regs->sof_mtr);
344 }
345 } else {
346 printf("fotg210: mini-A?\n");
347 }
348 }
349
350 /* switch data port to ep0 */
351 writel(DMAFIFO_CX, &regs->dma_fifo);
352 /* fetch 8 bytes setup packet */
353 tmp[0] = readl(&regs->ep0_data);
354 tmp[1] = readl(&regs->ep0_data);
355 /* release data port */
356 writel(0, &regs->dma_fifo);
357
358 if (req->bRequestType & USB_DIR_IN)
359 ep0_desc.bEndpointAddress = USB_DIR_IN;
360 else
361 ep0_desc.bEndpointAddress = USB_DIR_OUT;
362
363 ret = CX_IDLE;
364
365 if ((req->bRequestType & USB_TYPE_MASK) == USB_TYPE_STANDARD) {
366 switch (req->bRequest) {
367 case USB_REQ_SET_CONFIGURATION:
368 debug("fotg210: set_cfg(%d)\n", req->wValue & 0x00FF);
369 if (!(req->wValue & 0x00FF)) {
370 chip->state = USB_STATE_ADDRESS;
371 writel(chip->addr, &regs->dev_addr);
372 } else {
373 chip->state = USB_STATE_CONFIGURED;
374 writel(chip->addr | DEVADDR_CONF,
375 &regs->dev_addr);
376 }
377 ret = CX_IDLE;
378 break;
379
380 case USB_REQ_SET_ADDRESS:
381 debug("fotg210: set_addr(0x%04X)\n", req->wValue);
382 chip->state = USB_STATE_ADDRESS;
383 chip->addr = req->wValue & DEVADDR_ADDR_MASK;
384 ret = CX_FINISH;
385 writel(chip->addr, &regs->dev_addr);
386 break;
387
388 case USB_REQ_CLEAR_FEATURE:
389 debug("fotg210: clr_feature(%d, %d)\n",
390 req->bRequestType & 0x03, req->wValue);
391 switch (req->wValue) {
392 case 0: /* [Endpoint] halt */
393 ep_reset(chip, req->wIndex);
394 ret = CX_FINISH;
395 break;
396 case 1: /* [Device] remote wake-up */
397 case 2: /* [Device] test mode */
398 default:
399 ret = CX_STALL;
400 break;
401 }
402 break;
403
404 case USB_REQ_SET_FEATURE:
405 debug("fotg210: set_feature(%d, %d)\n",
406 req->wValue, req->wIndex & 0xf);
407 switch (req->wValue) {
408 case 0: /* Endpoint Halt */
409 id = req->wIndex & 0xf;
410 setbits_le32(&regs->iep[id - 1], IEP_STALL);
411 setbits_le32(&regs->oep[id - 1], OEP_STALL);
412 ret = CX_FINISH;
413 break;
414 case 1: /* Remote Wakeup */
415 case 2: /* Test Mode */
416 default:
417 ret = CX_STALL;
418 break;
419 }
420 break;
421
422 case USB_REQ_GET_STATUS:
423 debug("fotg210: get_status\n");
424 ret = CX_STALL;
425 break;
426
427 case USB_REQ_SET_DESCRIPTOR:
428 debug("fotg210: set_descriptor\n");
429 ret = CX_STALL;
430 break;
431
432 case USB_REQ_SYNCH_FRAME:
433 debug("fotg210: sync frame\n");
434 ret = CX_STALL;
435 break;
436 }
437 } /* if ((req->bRequestType & USB_TYPE_MASK) == USB_TYPE_STANDARD) */
438
439 if (ret == CX_IDLE && chip->driver->setup) {
440 if (chip->driver->setup(&chip->gadget, req) < 0)
441 ret = CX_STALL;
442 else
443 ret = CX_FINISH;
444 }
445
446 switch (ret) {
447 case CX_FINISH:
448 setbits_le32(&regs->cxfifo, CXFIFO_CXFIN);
449 break;
450
451 case CX_STALL:
452 setbits_le32(&regs->cxfifo, CXFIFO_CXSTALL | CXFIFO_CXFIN);
453 printf("fotg210: cx_stall!\n");
454 break;
455
456 case CX_IDLE:
457 debug("fotg210: cx_idle?\n");
458 default:
459 break;
460 }
461 }
462
463 /*
464 * fifo - FIFO id
465 * zlp - zero length packet
466 */
467 static void fotg210_recv(struct fotg210_chip *chip, int ep_id)
468 {
469 struct fotg210_regs *regs = chip->regs;
470 struct fotg210_ep *ep = chip->ep + ep_id;
471 struct fotg210_request *req;
472 int len;
473
474 if (ep->stopped || (ep->desc->bEndpointAddress & USB_DIR_IN)) {
475 printf("fotg210: ep%d recv, invalid!\n", ep->id);
476 return;
477 }
478
479 if (list_empty(&ep->queue)) {
480 printf("fotg210: ep%d recv, drop!\n", ep->id);
481 return;
482 }
483
484 req = list_first_entry(&ep->queue, struct fotg210_request, queue);
485 len = fotg210_dma(ep, req);
486 if (len < ep->ep.maxpacket || req->req.length <= req->req.actual) {
487 list_del_init(&req->queue);
488 if (req->req.complete)
489 req->req.complete(&ep->ep, &req->req);
490 }
491
492 if (ep->id > 0 && list_empty(&ep->queue)) {
493 setbits_le32(&regs->gimr1,
494 GIMR1_FIFO_RX(ep_to_fifo(chip, ep->id)));
495 }
496 }
497
498 /*
499 * USB Gadget Layer
500 */
501 static int fotg210_ep_enable(
502 struct usb_ep *_ep, const struct usb_endpoint_descriptor *desc)
503 {
504 struct fotg210_ep *ep = container_of(_ep, struct fotg210_ep, ep);
505 struct fotg210_chip *chip = ep->chip;
506 struct fotg210_regs *regs = chip->regs;
507 int id = ep_to_fifo(chip, ep->id);
508 int in = (desc->bEndpointAddress & USB_DIR_IN) ? 1 : 0;
509
510 if (!_ep || !desc
511 || desc->bDescriptorType != USB_DT_ENDPOINT
512 || le16_to_cpu(desc->wMaxPacketSize) == 0) {
513 printf("fotg210: bad ep or descriptor\n");
514 return -EINVAL;
515 }
516
517 ep->desc = desc;
518 ep->stopped = 0;
519
520 if (in)
521 setbits_le32(&regs->fifomap, FIFOMAP(id, FIFOMAP_IN));
522
523 switch (desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) {
524 case USB_ENDPOINT_XFER_CONTROL:
525 return -EINVAL;
526
527 case USB_ENDPOINT_XFER_ISOC:
528 setbits_le32(&regs->fifocfg,
529 FIFOCFG(id, FIFOCFG_EN | FIFOCFG_ISOC));
530 break;
531
532 case USB_ENDPOINT_XFER_BULK:
533 setbits_le32(&regs->fifocfg,
534 FIFOCFG(id, FIFOCFG_EN | FIFOCFG_BULK));
535 break;
536
537 case USB_ENDPOINT_XFER_INT:
538 setbits_le32(&regs->fifocfg,
539 FIFOCFG(id, FIFOCFG_EN | FIFOCFG_INTR));
540 break;
541 }
542
543 return 0;
544 }
545
546 static int fotg210_ep_disable(struct usb_ep *_ep)
547 {
548 struct fotg210_ep *ep = container_of(_ep, struct fotg210_ep, ep);
549 struct fotg210_chip *chip = ep->chip;
550 struct fotg210_regs *regs = chip->regs;
551 int id = ep_to_fifo(chip, ep->id);
552
553 ep->desc = NULL;
554 ep->stopped = 1;
555
556 clrbits_le32(&regs->fifocfg, FIFOCFG(id, FIFOCFG_CFG_MASK));
557 clrbits_le32(&regs->fifomap, FIFOMAP(id, FIFOMAP_DIR_MASK));
558
559 return 0;
560 }
561
562 static struct usb_request *fotg210_ep_alloc_request(
563 struct usb_ep *_ep, gfp_t gfp_flags)
564 {
565 struct fotg210_request *req = malloc(sizeof(*req));
566
567 if (req) {
568 memset(req, 0, sizeof(*req));
569 INIT_LIST_HEAD(&req->queue);
570 }
571 return &req->req;
572 }
573
574 static void fotg210_ep_free_request(
575 struct usb_ep *_ep, struct usb_request *_req)
576 {
577 struct fotg210_request *req;
578
579 req = container_of(_req, struct fotg210_request, req);
580 free(req);
581 }
582
583 static int fotg210_ep_queue(
584 struct usb_ep *_ep, struct usb_request *_req, gfp_t gfp_flags)
585 {
586 struct fotg210_ep *ep = container_of(_ep, struct fotg210_ep, ep);
587 struct fotg210_chip *chip = ep->chip;
588 struct fotg210_regs *regs = chip->regs;
589 struct fotg210_request *req;
590
591 req = container_of(_req, struct fotg210_request, req);
592 if (!_req || !_req->complete || !_req->buf
593 || !list_empty(&req->queue)) {
594 printf("fotg210: invalid request to ep%d\n", ep->id);
595 return -EINVAL;
596 }
597
598 if (!chip || chip->state == USB_STATE_SUSPENDED) {
599 printf("fotg210: request while chip suspended\n");
600 return -EINVAL;
601 }
602
603 req->req.actual = 0;
604 req->req.status = -EINPROGRESS;
605
606 if (req->req.length == 0) {
607 req->req.status = 0;
608 if (req->req.complete)
609 req->req.complete(&ep->ep, &req->req);
610 return 0;
611 }
612
613 if (ep->id == 0) {
614 do {
615 int len = fotg210_dma(ep, req);
616 if (len < ep->ep.maxpacket)
617 break;
618 if (ep->desc->bEndpointAddress & USB_DIR_IN)
619 udelay(100);
620 } while (req->req.length > req->req.actual);
621 } else {
622 if (ep->desc->bEndpointAddress & USB_DIR_IN) {
623 do {
624 int len = fotg210_dma(ep, req);
625 if (len < ep->ep.maxpacket)
626 break;
627 } while (req->req.length > req->req.actual);
628 } else {
629 list_add_tail(&req->queue, &ep->queue);
630 clrbits_le32(&regs->gimr1,
631 GIMR1_FIFO_RX(ep_to_fifo(chip, ep->id)));
632 }
633 }
634
635 if (ep->id == 0 || (ep->desc->bEndpointAddress & USB_DIR_IN)) {
636 if (req->req.complete)
637 req->req.complete(&ep->ep, &req->req);
638 }
639
640 return 0;
641 }
642
643 static int fotg210_ep_dequeue(struct usb_ep *_ep, struct usb_request *_req)
644 {
645 struct fotg210_ep *ep = container_of(_ep, struct fotg210_ep, ep);
646 struct fotg210_request *req;
647
648 /* make sure it's actually queued on this endpoint */
649 list_for_each_entry(req, &ep->queue, queue) {
650 if (&req->req == _req)
651 break;
652 }
653 if (&req->req != _req)
654 return -EINVAL;
655
656 /* remove the request */
657 list_del_init(&req->queue);
658
659 /* update status & invoke complete callback */
660 if (req->req.status == -EINPROGRESS) {
661 req->req.status = -ECONNRESET;
662 if (req->req.complete)
663 req->req.complete(_ep, &req->req);
664 }
665
666 return 0;
667 }
668
669 static int fotg210_ep_halt(struct usb_ep *_ep, int halt)
670 {
671 struct fotg210_ep *ep = container_of(_ep, struct fotg210_ep, ep);
672 struct fotg210_chip *chip = ep->chip;
673 struct fotg210_regs *regs = chip->regs;
674 int ret = -1;
675
676 debug("fotg210: ep%d halt=%d\n", ep->id, halt);
677
678 /* Endpoint STALL */
679 if (ep->id > 0 && ep->id <= CFG_NUM_ENDPOINTS) {
680 if (halt) {
681 /* wait until all ep fifo empty */
682 fotg210_cxwait(chip, 0xf00);
683 /* stall */
684 if (ep->desc->bEndpointAddress & USB_DIR_IN) {
685 setbits_le32(&regs->iep[ep->id - 1],
686 IEP_STALL);
687 } else {
688 setbits_le32(&regs->oep[ep->id - 1],
689 OEP_STALL);
690 }
691 } else {
692 if (ep->desc->bEndpointAddress & USB_DIR_IN) {
693 clrbits_le32(&regs->iep[ep->id - 1],
694 IEP_STALL);
695 } else {
696 clrbits_le32(&regs->oep[ep->id - 1],
697 OEP_STALL);
698 }
699 }
700 ret = 0;
701 }
702
703 return ret;
704 }
705
706 /*
707 * activate/deactivate link with host.
708 */
709 static void pullup(struct fotg210_chip *chip, int is_on)
710 {
711 struct fotg210_regs *regs = chip->regs;
712
713 if (is_on) {
714 if (!chip->pullup) {
715 chip->state = USB_STATE_POWERED;
716 chip->pullup = 1;
717 /* enable the chip */
718 setbits_le32(&regs->dev_ctrl, DEVCTRL_EN);
719 /* clear unplug bit (BIT0) */
720 clrbits_le32(&regs->phy_tmsr, PHYTMSR_UNPLUG);
721 }
722 } else {
723 chip->state = USB_STATE_NOTATTACHED;
724 chip->pullup = 0;
725 chip->addr = 0;
726 writel(chip->addr, &regs->dev_addr);
727 /* set unplug bit (BIT0) */
728 setbits_le32(&regs->phy_tmsr, PHYTMSR_UNPLUG);
729 /* disable the chip */
730 clrbits_le32(&regs->dev_ctrl, DEVCTRL_EN);
731 }
732 }
733
734 static int fotg210_pullup(struct usb_gadget *_gadget, int is_on)
735 {
736 struct fotg210_chip *chip;
737
738 chip = container_of(_gadget, struct fotg210_chip, gadget);
739
740 debug("fotg210: pullup=%d\n", is_on);
741
742 pullup(chip, is_on);
743
744 return 0;
745 }
746
747 static int fotg210_get_frame(struct usb_gadget *_gadget)
748 {
749 struct fotg210_chip *chip;
750 struct fotg210_regs *regs;
751
752 chip = container_of(_gadget, struct fotg210_chip, gadget);
753 regs = chip->regs;
754
755 return SOFFNR_FNR(readl(&regs->sof_fnr));
756 }
757
758 static struct usb_gadget_ops fotg210_gadget_ops = {
759 .get_frame = fotg210_get_frame,
760 .pullup = fotg210_pullup,
761 };
762
763 static struct usb_ep_ops fotg210_ep_ops = {
764 .enable = fotg210_ep_enable,
765 .disable = fotg210_ep_disable,
766 .queue = fotg210_ep_queue,
767 .dequeue = fotg210_ep_dequeue,
768 .set_halt = fotg210_ep_halt,
769 .alloc_request = fotg210_ep_alloc_request,
770 .free_request = fotg210_ep_free_request,
771 };
772
773 static struct fotg210_chip controller = {
774 .regs = (void __iomem *)CONFIG_FOTG210_BASE,
775 .gadget = {
776 .name = "fotg210_udc",
777 .ops = &fotg210_gadget_ops,
778 .ep0 = &controller.ep[0].ep,
779 .speed = USB_SPEED_UNKNOWN,
780 .is_dualspeed = 1,
781 .is_otg = 0,
782 .is_a_peripheral = 0,
783 .b_hnp_enable = 0,
784 .a_hnp_support = 0,
785 .a_alt_hnp_support = 0,
786 },
787 .ep[0] = {
788 .id = 0,
789 .ep = {
790 .name = "ep0",
791 .ops = &fotg210_ep_ops,
792 },
793 .desc = &ep0_desc,
794 .chip = &controller,
795 .maxpacket = CFG_EP0_MAX_PACKET_SIZE,
796 },
797 .ep[1] = {
798 .id = 1,
799 .ep = {
800 .name = "ep1",
801 .ops = &fotg210_ep_ops,
802 },
803 .chip = &controller,
804 .maxpacket = CFG_EPX_MAX_PACKET_SIZE,
805 },
806 .ep[2] = {
807 .id = 2,
808 .ep = {
809 .name = "ep2",
810 .ops = &fotg210_ep_ops,
811 },
812 .chip = &controller,
813 .maxpacket = CFG_EPX_MAX_PACKET_SIZE,
814 },
815 .ep[3] = {
816 .id = 3,
817 .ep = {
818 .name = "ep3",
819 .ops = &fotg210_ep_ops,
820 },
821 .chip = &controller,
822 .maxpacket = CFG_EPX_MAX_PACKET_SIZE,
823 },
824 .ep[4] = {
825 .id = 4,
826 .ep = {
827 .name = "ep4",
828 .ops = &fotg210_ep_ops,
829 },
830 .chip = &controller,
831 .maxpacket = CFG_EPX_MAX_PACKET_SIZE,
832 },
833 };
834
835 int usb_gadget_handle_interrupts(void)
836 {
837 struct fotg210_chip *chip = &controller;
838 struct fotg210_regs *regs = chip->regs;
839 uint32_t id, st, isr, gisr;
840
841 isr = readl(&regs->isr) & (~readl(&regs->imr));
842 gisr = readl(&regs->gisr) & (~readl(&regs->gimr));
843 if (!(isr & ISR_DEV) || !gisr)
844 return 0;
845
846 writel(ISR_DEV, &regs->isr);
847
848 /* CX interrupts */
849 if (gisr & GISR_GRP0) {
850 st = readl(&regs->gisr0);
851 /*
852 * Write 1 and then 0 works for both W1C & RW.
853 *
854 * HW v1.11.0+: It's a W1C register (write 1 clear)
855 * HW v1.10.0-: It's a R/W register (write 0 clear)
856 */
857 writel(st & GISR0_CXABORT, &regs->gisr0);
858 writel(0, &regs->gisr0);
859
860 if (st & GISR0_CXERR)
861 printf("fotg210: cmd error\n");
862
863 if (st & GISR0_CXABORT)
864 printf("fotg210: cmd abort\n");
865
866 if (st & GISR0_CXSETUP) /* setup */
867 fotg210_setup(chip);
868 else if (st & GISR0_CXEND) /* command finish */
869 setbits_le32(&regs->cxfifo, CXFIFO_CXFIN);
870 }
871
872 /* FIFO interrupts */
873 if (gisr & GISR_GRP1) {
874 st = readl(&regs->gisr1);
875 for (id = 0; id < 4; ++id) {
876 if (st & GISR1_RX_FIFO(id))
877 fotg210_recv(chip, fifo_to_ep(chip, id, 0));
878 }
879 }
880
881 /* Device Status Interrupts */
882 if (gisr & GISR_GRP2) {
883 st = readl(&regs->gisr2);
884 /*
885 * Write 1 and then 0 works for both W1C & RW.
886 *
887 * HW v1.11.0+: It's a W1C register (write 1 clear)
888 * HW v1.10.0-: It's a R/W register (write 0 clear)
889 */
890 writel(st, &regs->gisr2);
891 writel(0, &regs->gisr2);
892
893 if (st & GISR2_RESET)
894 printf("fotg210: reset by host\n");
895 else if (st & GISR2_SUSPEND)
896 printf("fotg210: suspend/removed\n");
897 else if (st & GISR2_RESUME)
898 printf("fotg210: resume\n");
899
900 /* Errors */
901 if (st & GISR2_ISOCERR)
902 printf("fotg210: iso error\n");
903 if (st & GISR2_ISOCABT)
904 printf("fotg210: iso abort\n");
905 if (st & GISR2_DMAERR)
906 printf("fotg210: dma error\n");
907 }
908
909 return 0;
910 }
911
912 int usb_gadget_register_driver(struct usb_gadget_driver *driver)
913 {
914 int i, ret = 0;
915 struct fotg210_chip *chip = &controller;
916
917 if (!driver || !driver->bind || !driver->setup) {
918 puts("fotg210: bad parameter.\n");
919 return -EINVAL;
920 }
921
922 INIT_LIST_HEAD(&chip->gadget.ep_list);
923 for (i = 0; i < CFG_NUM_ENDPOINTS + 1; ++i) {
924 struct fotg210_ep *ep = chip->ep + i;
925
926 ep->ep.maxpacket = ep->maxpacket;
927 INIT_LIST_HEAD(&ep->queue);
928
929 if (ep->id == 0) {
930 ep->stopped = 0;
931 } else {
932 ep->stopped = 1;
933 list_add_tail(&ep->ep.ep_list, &chip->gadget.ep_list);
934 }
935 }
936
937 if (fotg210_reset(chip)) {
938 puts("fotg210: reset failed.\n");
939 return -EINVAL;
940 }
941
942 ret = driver->bind(&chip->gadget);
943 if (ret) {
944 debug("fotg210: driver->bind() returned %d\n", ret);
945 return ret;
946 }
947 chip->driver = driver;
948
949 return ret;
950 }
951
952 int usb_gadget_unregister_driver(struct usb_gadget_driver *driver)
953 {
954 struct fotg210_chip *chip = &controller;
955
956 driver->unbind(&chip->gadget);
957 chip->driver = NULL;
958
959 pullup(chip, 0);
960
961 return 0;
962 }
u-boot for qq2440