2 * drivers/usb/gadget/dwc2_udc_otg.c
3 * Designware DWC2 on-chip full/high speed USB OTG 2.0 device controllers
5 * Copyright (C) 2008 for Samsung Electronics
7 * BSP Support for Samsung's UDC driver
9 * git://git.kernel.org/pub/scm/linux/kernel/git/kki_ap/linux-2.6-samsung.git
11 * State machine bugfixes:
12 * Marek Szyprowski <m.szyprowski@samsung.com>
15 * Marek Szyprowski <m.szyprowski@samsung.com>
16 * Lukasz Majewski <l.majewski@samsumg.com>
18 * SPDX-License-Identifier: GPL-2.0+
22 #include <linux/errno.h>
23 #include <linux/list.h>
26 #include <linux/usb/ch9.h>
27 #include <linux/usb/gadget.h>
29 #include <asm/byteorder.h>
30 #include <asm/unaligned.h>
33 #include <asm/mach-types.h>
35 #include "dwc2_udc_otg_regs.h"
36 #include "dwc2_udc_otg_priv.h"
37 #include <usb/lin_gadget_compat.h>
39 /***********************************************************/
41 #define OTG_DMA_MODE 1
46 #define DEBUG_OUT_EP 0
49 #include <usb/dwc2_udc.h>
54 static char *state_names[] = {
57 "DATA_STATE_NEED_ZLP",
58 "WAIT_FOR_OUT_STATUS",
61 "WAIT_FOR_OUT_COMPLETE",
62 "WAIT_FOR_IN_COMPLETE",
63 "WAIT_FOR_NULL_COMPLETE",
66 #define DRIVER_VERSION "15 March 2009"
68 struct dwc2_udc *the_controller;
70 static const char driver_name[] = "dwc2-udc";
71 static const char ep0name[] = "ep0-control";
74 static unsigned int ep0_fifo_size = 64;
75 static unsigned int ep_fifo_size = 512;
76 static unsigned int ep_fifo_size2 = 1024;
77 static int reset_available = 1;
79 static struct usb_ctrlrequest *usb_ctrl;
80 static dma_addr_t usb_ctrl_dma_addr;
85 static int dwc2_ep_enable(struct usb_ep *ep,
86 const struct usb_endpoint_descriptor *);
87 static int dwc2_ep_disable(struct usb_ep *ep);
88 static struct usb_request *dwc2_alloc_request(struct usb_ep *ep,
90 static void dwc2_free_request(struct usb_ep *ep, struct usb_request *);
92 static int dwc2_queue(struct usb_ep *ep, struct usb_request *, gfp_t gfp_flags);
93 static int dwc2_dequeue(struct usb_ep *ep, struct usb_request *);
94 static int dwc2_fifo_status(struct usb_ep *ep);
95 static void dwc2_fifo_flush(struct usb_ep *ep);
96 static void dwc2_ep0_read(struct dwc2_udc *dev);
97 static void dwc2_ep0_kick(struct dwc2_udc *dev, struct dwc2_ep *ep);
98 static void dwc2_handle_ep0(struct dwc2_udc *dev);
99 static int dwc2_ep0_write(struct dwc2_udc *dev);
100 static int write_fifo_ep0(struct dwc2_ep *ep, struct dwc2_request *req);
101 static void done(struct dwc2_ep *ep, struct dwc2_request *req, int status);
102 static void stop_activity(struct dwc2_udc *dev,
103 struct usb_gadget_driver *driver);
104 static int udc_enable(struct dwc2_udc *dev);
105 static void udc_set_address(struct dwc2_udc *dev, unsigned char address);
106 static void reconfig_usbd(struct dwc2_udc *dev);
107 static void set_max_pktsize(struct dwc2_udc *dev, enum usb_device_speed speed);
108 static void nuke(struct dwc2_ep *ep, int status);
109 static int dwc2_udc_set_halt(struct usb_ep *_ep, int value);
110 static void dwc2_udc_set_nak(struct dwc2_ep *ep);
112 void set_udc_gadget_private_data(void *p)
114 debug_cond(DEBUG_SETUP != 0,
115 "%s: the_controller: 0x%p, p: 0x%p\n", __func__,
117 the_controller->gadget.dev.device_data = p;
120 void *get_udc_gadget_private_data(struct usb_gadget *gadget)
122 return gadget->dev.device_data;
125 static struct usb_ep_ops dwc2_ep_ops = {
126 .enable = dwc2_ep_enable,
127 .disable = dwc2_ep_disable,
129 .alloc_request = dwc2_alloc_request,
130 .free_request = dwc2_free_request,
133 .dequeue = dwc2_dequeue,
135 .set_halt = dwc2_udc_set_halt,
136 .fifo_status = dwc2_fifo_status,
137 .fifo_flush = dwc2_fifo_flush,
140 #define create_proc_files() do {} while (0)
141 #define remove_proc_files() do {} while (0)
143 /***********************************************************/
145 void __iomem *regs_otg;
146 struct dwc2_usbotg_reg *reg;
148 bool dfu_usb_get_reset(void)
150 return !!(readl(®->gintsts) & INT_RESET);
153 __weak void otg_phy_init(struct dwc2_udc *dev) {}
154 __weak void otg_phy_off(struct dwc2_udc *dev) {}
156 /***********************************************************/
158 #include "dwc2_udc_otg_xfer_dma.c"
161 * udc_disable - disable USB device controller
163 static void udc_disable(struct dwc2_udc *dev)
165 debug_cond(DEBUG_SETUP != 0, "%s: %p\n", __func__, dev);
167 udc_set_address(dev, 0);
169 dev->ep0state = WAIT_FOR_SETUP;
170 dev->gadget.speed = USB_SPEED_UNKNOWN;
171 dev->usb_address = 0;
177 * udc_reinit - initialize software state
179 static void udc_reinit(struct dwc2_udc *dev)
183 debug_cond(DEBUG_SETUP != 0, "%s: %p\n", __func__, dev);
185 /* device/ep0 records init */
186 INIT_LIST_HEAD(&dev->gadget.ep_list);
187 INIT_LIST_HEAD(&dev->gadget.ep0->ep_list);
188 dev->ep0state = WAIT_FOR_SETUP;
190 /* basic endpoint records init */
191 for (i = 0; i < DWC2_MAX_ENDPOINTS; i++) {
192 struct dwc2_ep *ep = &dev->ep[i];
195 list_add_tail(&ep->ep.ep_list, &dev->gadget.ep_list);
199 INIT_LIST_HEAD(&ep->queue);
203 /* the rest was statically initialized, and is read-only */
206 #define BYTES2MAXP(x) (x / 8)
207 #define MAXP2BYTES(x) (x * 8)
209 /* until it's enabled, this UDC should be completely invisible
212 static int udc_enable(struct dwc2_udc *dev)
214 debug_cond(DEBUG_SETUP != 0, "%s: %p\n", __func__, dev);
219 debug_cond(DEBUG_SETUP != 0,
220 "DWC2 USB 2.0 OTG Controller Core Initialized : 0x%x\n",
221 readl(®->gintmsk));
223 dev->gadget.speed = USB_SPEED_UNKNOWN;
229 Register entry point for the peripheral controller driver.
231 int usb_gadget_register_driver(struct usb_gadget_driver *driver)
233 struct dwc2_udc *dev = the_controller;
235 unsigned long flags = 0;
237 debug_cond(DEBUG_SETUP != 0, "%s: %s\n", __func__, "no name");
240 || (driver->speed != USB_SPEED_FULL
241 && driver->speed != USB_SPEED_HIGH)
242 || !driver->bind || !driver->disconnect || !driver->setup)
249 spin_lock_irqsave(&dev->lock, flags);
250 /* first hook up the driver ... */
251 dev->driver = driver;
252 spin_unlock_irqrestore(&dev->lock, flags);
254 if (retval) { /* TODO */
255 printf("target device_add failed, error %d\n", retval);
259 retval = driver->bind(&dev->gadget);
261 debug_cond(DEBUG_SETUP != 0,
262 "%s: bind to driver --> error %d\n",
263 dev->gadget.name, retval);
270 debug_cond(DEBUG_SETUP != 0,
271 "Registered gadget driver %s\n", dev->gadget.name);
278 * Unregister entry point for the peripheral controller driver.
280 int usb_gadget_unregister_driver(struct usb_gadget_driver *driver)
282 struct dwc2_udc *dev = the_controller;
283 unsigned long flags = 0;
287 if (!driver || driver != dev->driver)
290 spin_lock_irqsave(&dev->lock, flags);
292 stop_activity(dev, driver);
293 spin_unlock_irqrestore(&dev->lock, flags);
295 driver->unbind(&dev->gadget);
297 disable_irq(IRQ_OTG);
304 * done - retire a request; caller blocked irqs
306 static void done(struct dwc2_ep *ep, struct dwc2_request *req, int status)
308 unsigned int stopped = ep->stopped;
310 debug("%s: %s %p, req = %p, stopped = %d\n",
311 __func__, ep->ep.name, ep, &req->req, stopped);
313 list_del_init(&req->queue);
315 if (likely(req->req.status == -EINPROGRESS))
316 req->req.status = status;
318 status = req->req.status;
320 if (status && status != -ESHUTDOWN) {
321 debug("complete %s req %p stat %d len %u/%u\n",
322 ep->ep.name, &req->req, status,
323 req->req.actual, req->req.length);
326 /* don't modify queue heads during completion callback */
330 printf("calling complete callback\n");
332 int i, len = req->req.length;
334 printf("pkt[%d] = ", req->req.length);
337 for (i = 0; i < len; i++) {
338 printf("%02x", ((u8 *)req->req.buf)[i]);
345 spin_unlock(&ep->dev->lock);
346 req->req.complete(&ep->ep, &req->req);
347 spin_lock(&ep->dev->lock);
349 debug("callback completed\n");
351 ep->stopped = stopped;
355 * nuke - dequeue ALL requests
357 static void nuke(struct dwc2_ep *ep, int status)
359 struct dwc2_request *req;
361 debug("%s: %s %p\n", __func__, ep->ep.name, ep);
363 /* called with irqs blocked */
364 while (!list_empty(&ep->queue)) {
365 req = list_entry(ep->queue.next, struct dwc2_request, queue);
366 done(ep, req, status);
370 static void stop_activity(struct dwc2_udc *dev,
371 struct usb_gadget_driver *driver)
375 /* don't disconnect drivers more than once */
376 if (dev->gadget.speed == USB_SPEED_UNKNOWN)
378 dev->gadget.speed = USB_SPEED_UNKNOWN;
380 /* prevent new request submissions, kill any outstanding requests */
381 for (i = 0; i < DWC2_MAX_ENDPOINTS; i++) {
382 struct dwc2_ep *ep = &dev->ep[i];
384 nuke(ep, -ESHUTDOWN);
387 /* report disconnect; the driver is already quiesced */
389 spin_unlock(&dev->lock);
390 driver->disconnect(&dev->gadget);
391 spin_lock(&dev->lock);
394 /* re-init driver-visible data structures */
398 static void reconfig_usbd(struct dwc2_udc *dev)
400 /* 2. Soft-reset OTG Core and then unreset again. */
402 unsigned int uTemp = writel(CORE_SOFT_RESET, ®->grstctl);
403 uint32_t dflt_gusbcfg;
404 uint32_t rx_fifo_sz, tx_fifo_sz, np_tx_fifo_sz;
406 debug("Reseting OTG controller\n");
409 0<<15 /* PHY Low Power Clock sel*/
410 |1<<14 /* Non-Periodic TxFIFO Rewind Enable*/
411 |0x5<<10 /* Turnaround time*/
412 |0<<9 | 0<<8 /* [0:HNP disable,1:HNP enable][ 0:SRP disable*/
413 /* 1:SRP enable] H1= 1,1*/
414 |0<<7 /* Ulpi DDR sel*/
415 |0<<6 /* 0: high speed utmi+, 1: full speed serial*/
416 |0<<4 /* 0: utmi+, 1:ulpi*/
417 #ifdef CONFIG_USB_GADGET_DWC2_OTG_PHY_BUS_WIDTH_8
418 |0<<3 /* phy i/f 0:8bit, 1:16bit*/
420 |1<<3 /* phy i/f 0:8bit, 1:16bit*/
422 |0x7<<0; /* HS/FS Timeout**/
424 if (dev->pdata->usb_gusbcfg)
425 dflt_gusbcfg = dev->pdata->usb_gusbcfg;
427 writel(dflt_gusbcfg, ®->gusbcfg);
429 /* 3. Put the OTG device core in the disconnected state.*/
430 uTemp = readl(®->dctl);
431 uTemp |= SOFT_DISCONNECT;
432 writel(uTemp, ®->dctl);
436 /* 4. Make the OTG device core exit from the disconnected state.*/
437 uTemp = readl(®->dctl);
438 uTemp = uTemp & ~SOFT_DISCONNECT;
439 writel(uTemp, ®->dctl);
441 /* 5. Configure OTG Core to initial settings of device mode.*/
442 /* [][1: full speed(30Mhz) 0:high speed]*/
443 writel(EP_MISS_CNT(1) | DEV_SPEED_HIGH_SPEED_20, ®->dcfg);
447 /* 6. Unmask the core interrupts*/
448 writel(GINTMSK_INIT, ®->gintmsk);
450 /* 7. Set NAK bit of EP0, EP1, EP2*/
451 writel(DEPCTL_EPDIS|DEPCTL_SNAK, ®->out_endp[EP0_CON].doepctl);
452 writel(DEPCTL_EPDIS|DEPCTL_SNAK, ®->in_endp[EP0_CON].diepctl);
454 for (i = 1; i < DWC2_MAX_ENDPOINTS; i++) {
455 writel(DEPCTL_EPDIS|DEPCTL_SNAK, ®->out_endp[i].doepctl);
456 writel(DEPCTL_EPDIS|DEPCTL_SNAK, ®->in_endp[i].diepctl);
459 /* 8. Unmask EPO interrupts*/
460 writel(((1 << EP0_CON) << DAINT_OUT_BIT)
461 | (1 << EP0_CON), ®->daintmsk);
463 /* 9. Unmask device OUT EP common interrupts*/
464 writel(DOEPMSK_INIT, ®->doepmsk);
466 /* 10. Unmask device IN EP common interrupts*/
467 writel(DIEPMSK_INIT, ®->diepmsk);
469 rx_fifo_sz = RX_FIFO_SIZE;
470 np_tx_fifo_sz = NPTX_FIFO_SIZE;
471 tx_fifo_sz = PTX_FIFO_SIZE;
473 if (dev->pdata->rx_fifo_sz)
474 rx_fifo_sz = dev->pdata->rx_fifo_sz;
475 if (dev->pdata->np_tx_fifo_sz)
476 np_tx_fifo_sz = dev->pdata->np_tx_fifo_sz;
477 if (dev->pdata->tx_fifo_sz)
478 tx_fifo_sz = dev->pdata->tx_fifo_sz;
480 /* 11. Set Rx FIFO Size (in 32-bit words) */
481 writel(rx_fifo_sz, ®->grxfsiz);
483 /* 12. Set Non Periodic Tx FIFO Size */
484 writel((np_tx_fifo_sz << 16) | rx_fifo_sz,
487 for (i = 1; i < DWC2_MAX_HW_ENDPOINTS; i++)
488 writel((rx_fifo_sz + np_tx_fifo_sz + tx_fifo_sz*(i-1)) |
489 tx_fifo_sz << 16, ®->dieptxf[i-1]);
491 /* Flush the RX FIFO */
492 writel(RX_FIFO_FLUSH, ®->grstctl);
493 while (readl(®->grstctl) & RX_FIFO_FLUSH)
494 debug("%s: waiting for DWC2_UDC_OTG_GRSTCTL\n", __func__);
496 /* Flush all the Tx FIFO's */
497 writel(TX_FIFO_FLUSH_ALL, ®->grstctl);
498 writel(TX_FIFO_FLUSH_ALL | TX_FIFO_FLUSH, ®->grstctl);
499 while (readl(®->grstctl) & TX_FIFO_FLUSH)
500 debug("%s: waiting for DWC2_UDC_OTG_GRSTCTL\n", __func__);
502 /* 13. Clear NAK bit of EP0, EP1, EP2*/
504 /* EP0: Control OUT */
505 writel(DEPCTL_EPDIS | DEPCTL_CNAK,
506 ®->out_endp[EP0_CON].doepctl);
508 /* 14. Initialize OTG Link Core.*/
509 writel(GAHBCFG_INIT, ®->gahbcfg);
512 static void set_max_pktsize(struct dwc2_udc *dev, enum usb_device_speed speed)
514 unsigned int ep_ctrl;
517 if (speed == USB_SPEED_HIGH) {
520 ep_fifo_size2 = 1024;
521 dev->gadget.speed = USB_SPEED_HIGH;
526 dev->gadget.speed = USB_SPEED_FULL;
529 dev->ep[0].ep.maxpacket = ep0_fifo_size;
530 for (i = 1; i < DWC2_MAX_ENDPOINTS; i++)
531 dev->ep[i].ep.maxpacket = ep_fifo_size;
533 /* EP0 - Control IN (64 bytes)*/
534 ep_ctrl = readl(®->in_endp[EP0_CON].diepctl);
535 writel(ep_ctrl|(0<<0), ®->in_endp[EP0_CON].diepctl);
537 /* EP0 - Control OUT (64 bytes)*/
538 ep_ctrl = readl(®->out_endp[EP0_CON].doepctl);
539 writel(ep_ctrl|(0<<0), ®->out_endp[EP0_CON].doepctl);
542 static int dwc2_ep_enable(struct usb_ep *_ep,
543 const struct usb_endpoint_descriptor *desc)
546 struct dwc2_udc *dev;
547 unsigned long flags = 0;
549 debug("%s: %p\n", __func__, _ep);
551 ep = container_of(_ep, struct dwc2_ep, ep);
552 if (!_ep || !desc || ep->desc || _ep->name == ep0name
553 || desc->bDescriptorType != USB_DT_ENDPOINT
554 || ep->bEndpointAddress != desc->bEndpointAddress
555 || ep_maxpacket(ep) <
556 le16_to_cpu(get_unaligned(&desc->wMaxPacketSize))) {
558 debug("%s: bad ep or descriptor\n", __func__);
562 /* xfer types must match, except that interrupt ~= bulk */
563 if (ep->bmAttributes != desc->bmAttributes
564 && ep->bmAttributes != USB_ENDPOINT_XFER_BULK
565 && desc->bmAttributes != USB_ENDPOINT_XFER_INT) {
567 debug("%s: %s type mismatch\n", __func__, _ep->name);
571 /* hardware _could_ do smaller, but driver doesn't */
572 if ((desc->bmAttributes == USB_ENDPOINT_XFER_BULK &&
573 le16_to_cpu(get_unaligned(&desc->wMaxPacketSize)) >
574 ep_maxpacket(ep)) || !get_unaligned(&desc->wMaxPacketSize)) {
576 debug("%s: bad %s maxpacket\n", __func__, _ep->name);
581 if (!dev->driver || dev->gadget.speed == USB_SPEED_UNKNOWN) {
583 debug("%s: bogus device state\n", __func__);
590 ep->ep.maxpacket = le16_to_cpu(get_unaligned(&desc->wMaxPacketSize));
592 /* Reset halt state */
593 dwc2_udc_set_nak(ep);
594 dwc2_udc_set_halt(_ep, 0);
596 spin_lock_irqsave(&ep->dev->lock, flags);
597 dwc2_udc_ep_activate(ep);
598 spin_unlock_irqrestore(&ep->dev->lock, flags);
600 debug("%s: enabled %s, stopped = %d, maxpacket = %d\n",
601 __func__, _ep->name, ep->stopped, ep->ep.maxpacket);
608 static int dwc2_ep_disable(struct usb_ep *_ep)
611 unsigned long flags = 0;
613 debug("%s: %p\n", __func__, _ep);
615 ep = container_of(_ep, struct dwc2_ep, ep);
616 if (!_ep || !ep->desc) {
617 debug("%s: %s not enabled\n", __func__,
618 _ep ? ep->ep.name : NULL);
622 spin_lock_irqsave(&ep->dev->lock, flags);
624 /* Nuke all pending requests */
625 nuke(ep, -ESHUTDOWN);
630 spin_unlock_irqrestore(&ep->dev->lock, flags);
632 debug("%s: disabled %s\n", __func__, _ep->name);
636 static struct usb_request *dwc2_alloc_request(struct usb_ep *ep,
639 struct dwc2_request *req;
641 debug("%s: %s %p\n", __func__, ep->name, ep);
643 req = memalign(CONFIG_SYS_CACHELINE_SIZE, sizeof(*req));
647 memset(req, 0, sizeof *req);
648 INIT_LIST_HEAD(&req->queue);
653 static void dwc2_free_request(struct usb_ep *ep, struct usb_request *_req)
655 struct dwc2_request *req;
657 debug("%s: %p\n", __func__, ep);
659 req = container_of(_req, struct dwc2_request, req);
660 WARN_ON(!list_empty(&req->queue));
664 /* dequeue JUST ONE request */
665 static int dwc2_dequeue(struct usb_ep *_ep, struct usb_request *_req)
668 struct dwc2_request *req;
669 unsigned long flags = 0;
671 debug("%s: %p\n", __func__, _ep);
673 ep = container_of(_ep, struct dwc2_ep, ep);
674 if (!_ep || ep->ep.name == ep0name)
677 spin_lock_irqsave(&ep->dev->lock, flags);
679 /* make sure it's actually queued on this endpoint */
680 list_for_each_entry(req, &ep->queue, queue) {
681 if (&req->req == _req)
684 if (&req->req != _req) {
685 spin_unlock_irqrestore(&ep->dev->lock, flags);
689 done(ep, req, -ECONNRESET);
691 spin_unlock_irqrestore(&ep->dev->lock, flags);
696 * Return bytes in EP FIFO
698 static int dwc2_fifo_status(struct usb_ep *_ep)
703 ep = container_of(_ep, struct dwc2_ep, ep);
705 debug("%s: bad ep\n", __func__);
709 debug("%s: %d\n", __func__, ep_index(ep));
711 /* LPD can't report unclaimed bytes from IN fifos */
721 static void dwc2_fifo_flush(struct usb_ep *_ep)
725 ep = container_of(_ep, struct dwc2_ep, ep);
726 if (unlikely(!_ep || (!ep->desc && ep->ep.name != ep0name))) {
727 debug("%s: bad ep\n", __func__);
731 debug("%s: %d\n", __func__, ep_index(ep));
734 static const struct usb_gadget_ops dwc2_udc_ops = {
735 /* current versions must always be self-powered */
738 static struct dwc2_udc memory = {
741 .ops = &dwc2_udc_ops,
742 .ep0 = &memory.ep[0].ep,
746 /* control endpoint */
751 .maxpacket = EP0_FIFO_SIZE,
755 .bEndpointAddress = 0,
758 .ep_type = ep_control,
761 /* first group of endpoints */
764 .name = "ep1in-bulk",
766 .maxpacket = EP_FIFO_SIZE,
770 .bEndpointAddress = USB_DIR_IN | 1,
771 .bmAttributes = USB_ENDPOINT_XFER_BULK,
773 .ep_type = ep_bulk_out,
779 .name = "ep2out-bulk",
781 .maxpacket = EP_FIFO_SIZE,
785 .bEndpointAddress = USB_DIR_OUT | 2,
786 .bmAttributes = USB_ENDPOINT_XFER_BULK,
788 .ep_type = ep_bulk_in,
796 .maxpacket = EP_FIFO_SIZE,
800 .bEndpointAddress = USB_DIR_IN | 3,
801 .bmAttributes = USB_ENDPOINT_XFER_INT,
803 .ep_type = ep_interrupt,
809 * probe - binds to the platform device
812 int dwc2_udc_probe(struct dwc2_plat_otg_data *pdata)
814 struct dwc2_udc *dev = &memory;
817 debug("%s: %p\n", __func__, pdata);
821 reg = (struct dwc2_usbotg_reg *)pdata->regs_otg;
823 /* regs_otg = (void *)pdata->regs_otg; */
825 dev->gadget.is_dualspeed = 1; /* Hack only*/
826 dev->gadget.is_otg = 0;
827 dev->gadget.is_a_peripheral = 0;
828 dev->gadget.b_hnp_enable = 0;
829 dev->gadget.a_hnp_support = 0;
830 dev->gadget.a_alt_hnp_support = 0;
832 the_controller = dev;
834 usb_ctrl = memalign(CONFIG_SYS_CACHELINE_SIZE,
835 ROUND(sizeof(struct usb_ctrlrequest),
836 CONFIG_SYS_CACHELINE_SIZE));
838 error("No memory available for UDC!\n");
842 usb_ctrl_dma_addr = (dma_addr_t) usb_ctrl;
849 int usb_gadget_handle_interrupts(int index)
851 u32 intr_status = readl(®->gintsts);
852 u32 gintmsk = readl(®->gintmsk);
854 if (intr_status & gintmsk)
855 return dwc2_udc_irq(1, (void *)the_controller);