2 * Faraday USB 2.0 OTG Controller
4 * (C) Copyright 2010 Faraday Technology
5 * Dante Su <dantesu@faraday-tech.com>
7 * SPDX-License-Identifier: GPL-2.0+
16 #include <asm/errno.h>
17 #include <linux/types.h>
18 #include <linux/usb/ch9.h>
19 #include <linux/usb/gadget.h>
21 #include <usb/fotg210.h>
23 #define CFG_NUM_ENDPOINTS 4
24 #define CFG_EP0_MAX_PACKET_SIZE 64
25 #define CFG_EPX_MAX_PACKET_SIZE 512
27 #define CFG_CMD_TIMEOUT (CONFIG_SYS_HZ >> 2) /* 250 ms */
38 struct list_head queue;
39 struct fotg210_chip *chip;
40 const struct usb_endpoint_descriptor *desc;
43 struct fotg210_request {
44 struct usb_request req;
45 struct list_head queue;
46 struct fotg210_ep *ep;
50 struct usb_gadget gadget;
51 struct usb_gadget_driver *driver;
52 struct fotg210_regs *regs;
56 enum usb_device_state state;
57 struct fotg210_ep ep[1 + CFG_NUM_ENDPOINTS];
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,
67 static inline int fifo_to_ep(struct fotg210_chip *chip, int id, int in)
69 return (id < 0) ? 0 : ((id & 0x03) + 1);
72 static inline int ep_to_fifo(struct fotg210_chip *chip, int id)
74 return (id <= 0) ? -1 : ((id - 1) & 0x03);
77 static inline int ep_reset(struct fotg210_chip *chip, uint8_t ep_addr)
79 int ep = ep_addr & USB_ENDPOINT_NUMBER_MASK;
80 struct fotg210_regs *regs = chip->regs;
82 if (ep_addr & USB_DIR_IN) {
84 setbits_le32(®s->iep[ep - 1], IEP_RESET);
86 clrbits_le32(®s->iep[ep - 1], IEP_RESET);
87 /* clear endpoint stall */
88 clrbits_le32(®s->iep[ep - 1], IEP_STALL);
91 setbits_le32(®s->oep[ep - 1], OEP_RESET);
93 clrbits_le32(®s->oep[ep - 1], OEP_RESET);
94 /* clear endpoint stall */
95 clrbits_le32(®s->oep[ep - 1], OEP_STALL);
101 static int fotg210_reset(struct fotg210_chip *chip)
103 struct fotg210_regs *regs = chip->regs;
106 chip->state = USB_STATE_POWERED;
109 writel(DEVCTRL_EN, ®s->dev_ctrl);
111 /* device address reset */
113 writel(0, ®s->dev_addr);
115 /* set idle counter to 7ms */
116 writel(7, ®s->idle);
118 /* disable all interrupts */
119 writel(IMR_MASK, ®s->imr);
120 writel(GIMR_MASK, ®s->gimr);
121 writel(GIMR0_MASK, ®s->gimr0);
122 writel(GIMR1_MASK, ®s->gimr1);
123 writel(GIMR2_MASK, ®s->gimr2);
125 /* clear interrupts */
126 writel(ISR_MASK, ®s->isr);
127 writel(0, ®s->gisr);
128 writel(0, ®s->gisr0);
129 writel(0, ®s->gisr1);
130 writel(0, ®s->gisr2);
133 setbits_le32(®s->dev_ctrl, DEVCTRL_RESET);
135 if (readl(®s->dev_ctrl) & DEVCTRL_RESET) {
136 printf("fotg210: chip reset failed\n");
141 setbits_le32(®s->cxfifo, CXFIFO_CXFIFOCLR);
143 if (readl(®s->cxfifo) & CXFIFO_CXFIFOCLR) {
144 printf("fotg210: ep0 fifo reset failed\n");
148 /* create static ep-fifo map (EP1 <-> FIFO0, EP2 <-> FIFO1 ...) */
149 writel(EPMAP14_DEFAULT, ®s->epmap14);
150 writel(EPMAP58_DEFAULT, ®s->epmap58);
151 writel(FIFOMAP_DEFAULT, ®s->fifomap);
152 writel(0, ®s->fifocfg);
153 for (i = 0; i < 8; ++i) {
154 writel(CFG_EPX_MAX_PACKET_SIZE, ®s->iep[i]);
155 writel(CFG_EPX_MAX_PACKET_SIZE, ®s->oep[i]);
159 for (i = 0; i < 4; ++i) {
160 writel(FIFOCSR_RESET, ®s->fifocsr[i]);
162 if (readl(®s->fifocsr[i]) & FIFOCSR_RESET) {
163 printf("fotg210: fifo%d reset failed\n", i);
168 /* enable only device interrupt and triggered at level-high */
169 writel(IMR_IRQLH | IMR_HOST | IMR_OTG, ®s->imr);
170 writel(ISR_MASK, ®s->isr);
171 /* disable EP0 IN/OUT interrupt */
172 writel(GIMR0_CXOUT | GIMR0_CXIN, ®s->gimr0);
173 /* disable EPX IN+SPK+OUT interrupts */
174 writel(GIMR1_MASK, ®s->gimr1);
175 /* disable wakeup+idle+dma+zlp interrupts */
176 writel(GIMR2_WAKEUP | GIMR2_IDLE | GIMR2_DMAERR | GIMR2_DMAFIN
177 | GIMR2_ZLPRX | GIMR2_ZLPTX, ®s->gimr2);
178 /* enable all group interrupt */
179 writel(0, ®s->gimr);
181 /* suspend delay = 3 ms */
182 writel(3, ®s->idle);
184 /* turn-on device interrupts */
185 setbits_le32(®s->dev_ctrl, DEVCTRL_GIRQ_EN);
190 static inline int fotg210_cxwait(struct fotg210_chip *chip, uint32_t mask)
192 struct fotg210_regs *regs = chip->regs;
196 for (ts = get_timer(0); get_timer(ts) < CFG_CMD_TIMEOUT; ) {
197 if ((readl(®s->cxfifo) & mask) != mask)
204 printf("fotg210: cx/ep0 timeout\n");
209 static int fotg210_dma(struct fotg210_ep *ep, struct fotg210_request *req)
211 struct fotg210_chip *chip = ep->chip;
212 struct fotg210_regs *regs = chip->regs;
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);
219 /* 1. init dma buffer */
220 if (len > ep->maxpacket)
223 /* 2. wait for dma ready (hardware) */
224 for (ts = get_timer(0); get_timer(ts) < CFG_CMD_TIMEOUT; ) {
225 if (!(readl(®s->dma_ctrl) & DMACTRL_START)) {
231 printf("fotg210: dma busy\n");
232 req->req.status = ret;
236 /* 3. DMA target setup */
237 if (ep->desc->bEndpointAddress & USB_DIR_IN)
238 flush_dcache_range((ulong)buf, (ulong)buf + len);
240 invalidate_dcache_range((ulong)buf, (ulong)buf + len);
242 writel(virt_to_phys(buf), ®s->dma_addr);
244 if (ep->desc->bEndpointAddress & USB_DIR_IN) {
246 /* Wait until cx/ep0 fifo empty */
247 fotg210_cxwait(chip, CXFIFO_CXFIFOE);
248 writel(DMAFIFO_CX, ®s->dma_fifo);
250 /* Wait until epx fifo empty */
251 fotg210_cxwait(chip, CXFIFO_FIFOE(fifo));
252 writel(DMAFIFO_FIFO(fifo), ®s->dma_fifo);
254 writel(DMACTRL_LEN(len) | DMACTRL_MEM2FIFO, ®s->dma_ctrl);
259 writel(DMAFIFO_CX, ®s->dma_fifo);
261 blen = CXFIFO_BYTES(readl(®s->cxfifo));
262 } while (blen < len);
264 writel(DMAFIFO_FIFO(fifo), ®s->dma_fifo);
265 blen = FIFOCSR_BYTES(readl(®s->fifocsr[fifo]));
267 len = (len < blen) ? len : blen;
268 writel(DMACTRL_LEN(len) | DMACTRL_FIFO2MEM, ®s->dma_ctrl);
272 setbits_le32(®s->dma_ctrl, DMACTRL_START);
276 for (ts = get_timer(0); get_timer(ts) < CFG_CMD_TIMEOUT; ) {
277 tmp = readl(®s->gisr2);
279 if (tmp & GISR2_DMAFIN) {
284 if (tmp & GISR2_DMAERR) {
285 printf("fotg210: dma error\n");
288 /* resume, suspend, reset */
289 if (tmp & (GISR2_RESUME | GISR2_SUSPEND | GISR2_RESET)) {
290 printf("fotg210: dma reset by host\n");
295 /* 7. DMA target reset */
297 writel(DMACTRL_ABORT | DMACTRL_CLRFF, ®s->dma_ctrl);
299 writel(0, ®s->gisr2);
300 writel(0, ®s->dma_fifo);
302 req->req.status = ret;
304 req->req.actual += len;
306 printf("fotg210: ep%d dma error(code=%d)\n", ep->id, ret);
312 * result of setup packet
318 static void fotg210_setup(struct fotg210_chip *chip)
320 int id, ret = CX_IDLE;
322 struct usb_ctrlrequest *req = (struct usb_ctrlrequest *)tmp;
323 struct fotg210_regs *regs = chip->regs;
326 * If this is the first Cx 8 byte command,
327 * we can now query USB mode (high/full speed; USB 2.0/USB 1.0)
329 if (chip->state == USB_STATE_POWERED) {
330 chip->state = USB_STATE_DEFAULT;
331 if (readl(®s->otgcsr) & OTGCSR_DEV_B) {
333 if (readl(®s->dev_ctrl) & DEVCTRL_HS) {
334 puts("fotg210: HS\n");
335 chip->gadget.speed = USB_SPEED_HIGH;
336 /* SOF mask timer = 1100 ticks */
337 writel(SOFMTR_TMR(1100), ®s->sof_mtr);
339 puts("fotg210: FS\n");
340 chip->gadget.speed = USB_SPEED_FULL;
341 /* SOF mask timer = 10000 ticks */
342 writel(SOFMTR_TMR(10000), ®s->sof_mtr);
345 printf("fotg210: mini-A?\n");
349 /* switch data port to ep0 */
350 writel(DMAFIFO_CX, ®s->dma_fifo);
351 /* fetch 8 bytes setup packet */
352 tmp[0] = readl(®s->ep0_data);
353 tmp[1] = readl(®s->ep0_data);
354 /* release data port */
355 writel(0, ®s->dma_fifo);
357 if (req->bRequestType & USB_DIR_IN)
358 ep0_desc.bEndpointAddress = USB_DIR_IN;
360 ep0_desc.bEndpointAddress = USB_DIR_OUT;
364 if ((req->bRequestType & USB_TYPE_MASK) == USB_TYPE_STANDARD) {
365 switch (req->bRequest) {
366 case USB_REQ_SET_CONFIGURATION:
367 debug("fotg210: set_cfg(%d)\n", req->wValue & 0x00FF);
368 if (!(req->wValue & 0x00FF)) {
369 chip->state = USB_STATE_ADDRESS;
370 writel(chip->addr, ®s->dev_addr);
372 chip->state = USB_STATE_CONFIGURED;
373 writel(chip->addr | DEVADDR_CONF,
379 case USB_REQ_SET_ADDRESS:
380 debug("fotg210: set_addr(0x%04X)\n", req->wValue);
381 chip->state = USB_STATE_ADDRESS;
382 chip->addr = req->wValue & DEVADDR_ADDR_MASK;
384 writel(chip->addr, ®s->dev_addr);
387 case USB_REQ_CLEAR_FEATURE:
388 debug("fotg210: clr_feature(%d, %d)\n",
389 req->bRequestType & 0x03, req->wValue);
390 switch (req->wValue) {
391 case 0: /* [Endpoint] halt */
392 ep_reset(chip, req->wIndex);
395 case 1: /* [Device] remote wake-up */
396 case 2: /* [Device] test mode */
403 case USB_REQ_SET_FEATURE:
404 debug("fotg210: set_feature(%d, %d)\n",
405 req->wValue, req->wIndex & 0xf);
406 switch (req->wValue) {
407 case 0: /* Endpoint Halt */
408 id = req->wIndex & 0xf;
409 setbits_le32(®s->iep[id - 1], IEP_STALL);
410 setbits_le32(®s->oep[id - 1], OEP_STALL);
413 case 1: /* Remote Wakeup */
414 case 2: /* Test Mode */
421 case USB_REQ_GET_STATUS:
422 debug("fotg210: get_status\n");
426 case USB_REQ_SET_DESCRIPTOR:
427 debug("fotg210: set_descriptor\n");
431 case USB_REQ_SYNCH_FRAME:
432 debug("fotg210: sync frame\n");
436 } /* if ((req->bRequestType & USB_TYPE_MASK) == USB_TYPE_STANDARD) */
438 if (ret == CX_IDLE && chip->driver->setup) {
439 if (chip->driver->setup(&chip->gadget, req) < 0)
447 setbits_le32(®s->cxfifo, CXFIFO_CXFIN);
451 setbits_le32(®s->cxfifo, CXFIFO_CXSTALL | CXFIFO_CXFIN);
452 printf("fotg210: cx_stall!\n");
456 debug("fotg210: cx_idle?\n");
464 * zlp - zero length packet
466 static void fotg210_recv(struct fotg210_chip *chip, int ep_id)
468 struct fotg210_regs *regs = chip->regs;
469 struct fotg210_ep *ep = chip->ep + ep_id;
470 struct fotg210_request *req;
473 if (ep->stopped || (ep->desc->bEndpointAddress & USB_DIR_IN)) {
474 printf("fotg210: ep%d recv, invalid!\n", ep->id);
478 if (list_empty(&ep->queue)) {
479 printf("fotg210: ep%d recv, drop!\n", ep->id);
483 req = list_first_entry(&ep->queue, struct fotg210_request, queue);
484 len = fotg210_dma(ep, req);
485 if (len < ep->ep.maxpacket || req->req.length <= req->req.actual) {
486 list_del_init(&req->queue);
487 if (req->req.complete)
488 req->req.complete(&ep->ep, &req->req);
491 if (ep->id > 0 && list_empty(&ep->queue)) {
492 setbits_le32(®s->gimr1,
493 GIMR1_FIFO_RX(ep_to_fifo(chip, ep->id)));
500 static int fotg210_ep_enable(
501 struct usb_ep *_ep, const struct usb_endpoint_descriptor *desc)
503 struct fotg210_ep *ep = container_of(_ep, struct fotg210_ep, ep);
504 struct fotg210_chip *chip = ep->chip;
505 struct fotg210_regs *regs = chip->regs;
506 int id = ep_to_fifo(chip, ep->id);
507 int in = (desc->bEndpointAddress & USB_DIR_IN) ? 1 : 0;
510 || desc->bDescriptorType != USB_DT_ENDPOINT
511 || le16_to_cpu(desc->wMaxPacketSize) == 0) {
512 printf("fotg210: bad ep or descriptor\n");
520 setbits_le32(®s->fifomap, FIFOMAP(id, FIFOMAP_IN));
522 switch (desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) {
523 case USB_ENDPOINT_XFER_CONTROL:
526 case USB_ENDPOINT_XFER_ISOC:
527 setbits_le32(®s->fifocfg,
528 FIFOCFG(id, FIFOCFG_EN | FIFOCFG_ISOC));
531 case USB_ENDPOINT_XFER_BULK:
532 setbits_le32(®s->fifocfg,
533 FIFOCFG(id, FIFOCFG_EN | FIFOCFG_BULK));
536 case USB_ENDPOINT_XFER_INT:
537 setbits_le32(®s->fifocfg,
538 FIFOCFG(id, FIFOCFG_EN | FIFOCFG_INTR));
545 static int fotg210_ep_disable(struct usb_ep *_ep)
547 struct fotg210_ep *ep = container_of(_ep, struct fotg210_ep, ep);
548 struct fotg210_chip *chip = ep->chip;
549 struct fotg210_regs *regs = chip->regs;
550 int id = ep_to_fifo(chip, ep->id);
555 clrbits_le32(®s->fifocfg, FIFOCFG(id, FIFOCFG_CFG_MASK));
556 clrbits_le32(®s->fifomap, FIFOMAP(id, FIFOMAP_DIR_MASK));
561 static struct usb_request *fotg210_ep_alloc_request(
562 struct usb_ep *_ep, gfp_t gfp_flags)
564 struct fotg210_request *req = malloc(sizeof(*req));
567 memset(req, 0, sizeof(*req));
568 INIT_LIST_HEAD(&req->queue);
573 static void fotg210_ep_free_request(
574 struct usb_ep *_ep, struct usb_request *_req)
576 struct fotg210_request *req;
578 req = container_of(_req, struct fotg210_request, req);
582 static int fotg210_ep_queue(
583 struct usb_ep *_ep, struct usb_request *_req, gfp_t gfp_flags)
585 struct fotg210_ep *ep = container_of(_ep, struct fotg210_ep, ep);
586 struct fotg210_chip *chip = ep->chip;
587 struct fotg210_regs *regs = chip->regs;
588 struct fotg210_request *req;
590 req = container_of(_req, struct fotg210_request, req);
591 if (!_req || !_req->complete || !_req->buf
592 || !list_empty(&req->queue)) {
593 printf("fotg210: invalid request to ep%d\n", ep->id);
597 if (!chip || chip->state == USB_STATE_SUSPENDED) {
598 printf("fotg210: request while chip suspended\n");
603 req->req.status = -EINPROGRESS;
605 if (req->req.length == 0) {
607 if (req->req.complete)
608 req->req.complete(&ep->ep, &req->req);
614 int len = fotg210_dma(ep, req);
615 if (len < ep->ep.maxpacket)
617 if (ep->desc->bEndpointAddress & USB_DIR_IN)
619 } while (req->req.length > req->req.actual);
621 if (ep->desc->bEndpointAddress & USB_DIR_IN) {
623 int len = fotg210_dma(ep, req);
624 if (len < ep->ep.maxpacket)
626 } while (req->req.length > req->req.actual);
628 list_add_tail(&req->queue, &ep->queue);
629 clrbits_le32(®s->gimr1,
630 GIMR1_FIFO_RX(ep_to_fifo(chip, ep->id)));
634 if (ep->id == 0 || (ep->desc->bEndpointAddress & USB_DIR_IN)) {
635 if (req->req.complete)
636 req->req.complete(&ep->ep, &req->req);
642 static int fotg210_ep_dequeue(struct usb_ep *_ep, struct usb_request *_req)
644 struct fotg210_ep *ep = container_of(_ep, struct fotg210_ep, ep);
645 struct fotg210_request *req;
647 /* make sure it's actually queued on this endpoint */
648 list_for_each_entry(req, &ep->queue, queue) {
649 if (&req->req == _req)
652 if (&req->req != _req)
655 /* remove the request */
656 list_del_init(&req->queue);
658 /* update status & invoke complete callback */
659 if (req->req.status == -EINPROGRESS) {
660 req->req.status = -ECONNRESET;
661 if (req->req.complete)
662 req->req.complete(_ep, &req->req);
668 static int fotg210_ep_halt(struct usb_ep *_ep, int halt)
670 struct fotg210_ep *ep = container_of(_ep, struct fotg210_ep, ep);
671 struct fotg210_chip *chip = ep->chip;
672 struct fotg210_regs *regs = chip->regs;
675 debug("fotg210: ep%d halt=%d\n", ep->id, halt);
678 if (ep->id > 0 && ep->id <= CFG_NUM_ENDPOINTS) {
680 /* wait until all ep fifo empty */
681 fotg210_cxwait(chip, 0xf00);
683 if (ep->desc->bEndpointAddress & USB_DIR_IN) {
684 setbits_le32(®s->iep[ep->id - 1],
687 setbits_le32(®s->oep[ep->id - 1],
691 if (ep->desc->bEndpointAddress & USB_DIR_IN) {
692 clrbits_le32(®s->iep[ep->id - 1],
695 clrbits_le32(®s->oep[ep->id - 1],
706 * activate/deactivate link with host.
708 static void pullup(struct fotg210_chip *chip, int is_on)
710 struct fotg210_regs *regs = chip->regs;
714 chip->state = USB_STATE_POWERED;
716 /* enable the chip */
717 setbits_le32(®s->dev_ctrl, DEVCTRL_EN);
718 /* clear unplug bit (BIT0) */
719 clrbits_le32(®s->phy_tmsr, PHYTMSR_UNPLUG);
722 chip->state = USB_STATE_NOTATTACHED;
725 writel(chip->addr, ®s->dev_addr);
726 /* set unplug bit (BIT0) */
727 setbits_le32(®s->phy_tmsr, PHYTMSR_UNPLUG);
728 /* disable the chip */
729 clrbits_le32(®s->dev_ctrl, DEVCTRL_EN);
733 static int fotg210_pullup(struct usb_gadget *_gadget, int is_on)
735 struct fotg210_chip *chip;
737 chip = container_of(_gadget, struct fotg210_chip, gadget);
739 debug("fotg210: pullup=%d\n", is_on);
746 static int fotg210_get_frame(struct usb_gadget *_gadget)
748 struct fotg210_chip *chip;
749 struct fotg210_regs *regs;
751 chip = container_of(_gadget, struct fotg210_chip, gadget);
754 return SOFFNR_FNR(readl(®s->sof_fnr));
757 static struct usb_gadget_ops fotg210_gadget_ops = {
758 .get_frame = fotg210_get_frame,
759 .pullup = fotg210_pullup,
762 static struct usb_ep_ops fotg210_ep_ops = {
763 .enable = fotg210_ep_enable,
764 .disable = fotg210_ep_disable,
765 .queue = fotg210_ep_queue,
766 .dequeue = fotg210_ep_dequeue,
767 .set_halt = fotg210_ep_halt,
768 .alloc_request = fotg210_ep_alloc_request,
769 .free_request = fotg210_ep_free_request,
772 static struct fotg210_chip controller = {
773 .regs = (void __iomem *)CONFIG_FOTG210_BASE,
775 .name = "fotg210_udc",
776 .ops = &fotg210_gadget_ops,
777 .ep0 = &controller.ep[0].ep,
778 .speed = USB_SPEED_UNKNOWN,
781 .is_a_peripheral = 0,
784 .a_alt_hnp_support = 0,
790 .ops = &fotg210_ep_ops,
794 .maxpacket = CFG_EP0_MAX_PACKET_SIZE,
800 .ops = &fotg210_ep_ops,
803 .maxpacket = CFG_EPX_MAX_PACKET_SIZE,
809 .ops = &fotg210_ep_ops,
812 .maxpacket = CFG_EPX_MAX_PACKET_SIZE,
818 .ops = &fotg210_ep_ops,
821 .maxpacket = CFG_EPX_MAX_PACKET_SIZE,
827 .ops = &fotg210_ep_ops,
830 .maxpacket = CFG_EPX_MAX_PACKET_SIZE,
834 int usb_gadget_handle_interrupts(void)
836 struct fotg210_chip *chip = &controller;
837 struct fotg210_regs *regs = chip->regs;
838 uint32_t id, st, isr, gisr;
840 isr = readl(®s->isr) & (~readl(®s->imr));
841 gisr = readl(®s->gisr) & (~readl(®s->gimr));
842 if (!(isr & ISR_DEV) || !gisr)
845 writel(ISR_DEV, ®s->isr);
848 if (gisr & GISR_GRP0) {
849 st = readl(®s->gisr0);
850 writel(0, ®s->gisr0);
852 if (st & GISR0_CXERR)
853 printf("fotg210: cmd error\n");
855 if (st & GISR0_CXABORT)
856 printf("fotg210: cmd abort\n");
858 if (st & GISR0_CXSETUP) /* setup */
860 else if (st & GISR0_CXEND) /* command finish */
861 setbits_le32(®s->cxfifo, CXFIFO_CXFIN);
864 /* FIFO interrupts */
865 if (gisr & GISR_GRP1) {
866 st = readl(®s->gisr1);
867 for (id = 0; id < 4; ++id) {
868 if (st & GISR1_RX_FIFO(id))
869 fotg210_recv(chip, fifo_to_ep(chip, id, 0));
873 /* Device Status Interrupts */
874 if (gisr & GISR_GRP2) {
875 st = readl(®s->gisr2);
876 writel(0, ®s->gisr2);
878 if (st & GISR2_RESET)
879 printf("fotg210: reset by host\n");
880 else if (st & GISR2_SUSPEND)
881 printf("fotg210: suspend/removed\n");
882 else if (st & GISR2_RESUME)
883 printf("fotg210: resume\n");
886 if (st & GISR2_ISOCERR)
887 printf("fotg210: iso error\n");
888 if (st & GISR2_ISOCABT)
889 printf("fotg210: iso abort\n");
890 if (st & GISR2_DMAERR)
891 printf("fotg210: dma error\n");
897 int usb_gadget_register_driver(struct usb_gadget_driver *driver)
900 struct fotg210_chip *chip = &controller;
902 if (!driver || !driver->bind || !driver->setup) {
903 puts("fotg210: bad parameter.\n");
907 INIT_LIST_HEAD(&chip->gadget.ep_list);
908 for (i = 0; i < CFG_NUM_ENDPOINTS + 1; ++i) {
909 struct fotg210_ep *ep = chip->ep + i;
911 ep->ep.maxpacket = ep->maxpacket;
912 INIT_LIST_HEAD(&ep->queue);
918 list_add_tail(&ep->ep.ep_list, &chip->gadget.ep_list);
922 if (fotg210_reset(chip)) {
923 puts("fotg210: reset failed.\n");
927 ret = driver->bind(&chip->gadget);
929 debug("fotg210: driver->bind() returned %d\n", ret);
932 chip->driver = driver;
937 int usb_gadget_unregister_driver(struct usb_gadget_driver *driver)
939 struct fotg210_chip *chip = &controller;
941 driver->unbind(&chip->gadget);