1 // SPDX-License-Identifier: GPL-2.0+
3 * drivers/usb/gadget/dwc2_udc_otg.c
4 * Designware DWC2 on-chip full/high speed USB OTG 2.0 device controllers
6 * Copyright (C) 2008 for Samsung Electronics
8 * BSP Support for Samsung's UDC driver
10 * git://git.kernel.org/pub/scm/linux/kernel/git/kki_ap/linux-2.6-samsung.git
12 * State machine bugfixes:
13 * Marek Szyprowski <m.szyprowski@samsung.com>
16 * Marek Szyprowski <m.szyprowski@samsung.com>
17 * Lukasz Majewski <l.majewski@samsumg.com>
21 #include <linux/errno.h>
22 #include <linux/list.h>
25 #include <linux/usb/ch9.h>
26 #include <linux/usb/gadget.h>
28 #include <asm/byteorder.h>
29 #include <asm/unaligned.h>
32 #include <asm/mach-types.h>
34 #include "dwc2_udc_otg_regs.h"
35 #include "dwc2_udc_otg_priv.h"
36 #include <usb/lin_gadget_compat.h>
38 /***********************************************************/
40 #define OTG_DMA_MODE 1
45 #define DEBUG_OUT_EP 0
48 #include <usb/dwc2_udc.h>
53 static char *state_names[] = {
56 "DATA_STATE_NEED_ZLP",
57 "WAIT_FOR_OUT_STATUS",
60 "WAIT_FOR_OUT_COMPLETE",
61 "WAIT_FOR_IN_COMPLETE",
62 "WAIT_FOR_NULL_COMPLETE",
65 #define DRIVER_VERSION "15 March 2009"
67 struct dwc2_udc *the_controller;
69 static const char driver_name[] = "dwc2-udc";
70 static const char ep0name[] = "ep0-control";
73 static unsigned int ep0_fifo_size = 64;
74 static unsigned int ep_fifo_size = 512;
75 static unsigned int ep_fifo_size2 = 1024;
76 static int reset_available = 1;
78 static struct usb_ctrlrequest *usb_ctrl;
79 static dma_addr_t usb_ctrl_dma_addr;
84 static int dwc2_ep_enable(struct usb_ep *ep,
85 const struct usb_endpoint_descriptor *);
86 static int dwc2_ep_disable(struct usb_ep *ep);
87 static struct usb_request *dwc2_alloc_request(struct usb_ep *ep,
89 static void dwc2_free_request(struct usb_ep *ep, struct usb_request *);
91 static int dwc2_queue(struct usb_ep *ep, struct usb_request *, gfp_t gfp_flags);
92 static int dwc2_dequeue(struct usb_ep *ep, struct usb_request *);
93 static int dwc2_fifo_status(struct usb_ep *ep);
94 static void dwc2_fifo_flush(struct usb_ep *ep);
95 static void dwc2_ep0_read(struct dwc2_udc *dev);
96 static void dwc2_ep0_kick(struct dwc2_udc *dev, struct dwc2_ep *ep);
97 static void dwc2_handle_ep0(struct dwc2_udc *dev);
98 static int dwc2_ep0_write(struct dwc2_udc *dev);
99 static int write_fifo_ep0(struct dwc2_ep *ep, struct dwc2_request *req);
100 static void done(struct dwc2_ep *ep, struct dwc2_request *req, int status);
101 static void stop_activity(struct dwc2_udc *dev,
102 struct usb_gadget_driver *driver);
103 static int udc_enable(struct dwc2_udc *dev);
104 static void udc_set_address(struct dwc2_udc *dev, unsigned char address);
105 static void reconfig_usbd(struct dwc2_udc *dev);
106 static void set_max_pktsize(struct dwc2_udc *dev, enum usb_device_speed speed);
107 static void nuke(struct dwc2_ep *ep, int status);
108 static int dwc2_udc_set_halt(struct usb_ep *_ep, int value);
109 static void dwc2_udc_set_nak(struct dwc2_ep *ep);
111 void set_udc_gadget_private_data(void *p)
113 debug_cond(DEBUG_SETUP != 0,
114 "%s: the_controller: 0x%p, p: 0x%p\n", __func__,
116 the_controller->gadget.dev.device_data = p;
119 void *get_udc_gadget_private_data(struct usb_gadget *gadget)
121 return gadget->dev.device_data;
124 static struct usb_ep_ops dwc2_ep_ops = {
125 .enable = dwc2_ep_enable,
126 .disable = dwc2_ep_disable,
128 .alloc_request = dwc2_alloc_request,
129 .free_request = dwc2_free_request,
132 .dequeue = dwc2_dequeue,
134 .set_halt = dwc2_udc_set_halt,
135 .fifo_status = dwc2_fifo_status,
136 .fifo_flush = dwc2_fifo_flush,
139 #define create_proc_files() do {} while (0)
140 #define remove_proc_files() do {} while (0)
142 /***********************************************************/
144 void __iomem *regs_otg;
145 struct dwc2_usbotg_reg *reg;
147 bool dfu_usb_get_reset(void)
149 return !!(readl(®->gintsts) & INT_RESET);
152 __weak void otg_phy_init(struct dwc2_udc *dev) {}
153 __weak void otg_phy_off(struct dwc2_udc *dev) {}
155 /***********************************************************/
157 #include "dwc2_udc_otg_xfer_dma.c"
160 * udc_disable - disable USB device controller
162 static void udc_disable(struct dwc2_udc *dev)
164 debug_cond(DEBUG_SETUP != 0, "%s: %p\n", __func__, dev);
166 udc_set_address(dev, 0);
168 dev->ep0state = WAIT_FOR_SETUP;
169 dev->gadget.speed = USB_SPEED_UNKNOWN;
170 dev->usb_address = 0;
176 * udc_reinit - initialize software state
178 static void udc_reinit(struct dwc2_udc *dev)
182 debug_cond(DEBUG_SETUP != 0, "%s: %p\n", __func__, dev);
184 /* device/ep0 records init */
185 INIT_LIST_HEAD(&dev->gadget.ep_list);
186 INIT_LIST_HEAD(&dev->gadget.ep0->ep_list);
187 dev->ep0state = WAIT_FOR_SETUP;
189 /* basic endpoint records init */
190 for (i = 0; i < DWC2_MAX_ENDPOINTS; i++) {
191 struct dwc2_ep *ep = &dev->ep[i];
194 list_add_tail(&ep->ep.ep_list, &dev->gadget.ep_list);
198 INIT_LIST_HEAD(&ep->queue);
202 /* the rest was statically initialized, and is read-only */
205 #define BYTES2MAXP(x) (x / 8)
206 #define MAXP2BYTES(x) (x * 8)
208 /* until it's enabled, this UDC should be completely invisible
211 static int udc_enable(struct dwc2_udc *dev)
213 debug_cond(DEBUG_SETUP != 0, "%s: %p\n", __func__, dev);
218 debug_cond(DEBUG_SETUP != 0,
219 "DWC2 USB 2.0 OTG Controller Core Initialized : 0x%x\n",
220 readl(®->gintmsk));
222 dev->gadget.speed = USB_SPEED_UNKNOWN;
228 Register entry point for the peripheral controller driver.
230 int usb_gadget_register_driver(struct usb_gadget_driver *driver)
232 struct dwc2_udc *dev = the_controller;
234 unsigned long flags = 0;
236 debug_cond(DEBUG_SETUP != 0, "%s: %s\n", __func__, "no name");
239 || (driver->speed != USB_SPEED_FULL
240 && driver->speed != USB_SPEED_HIGH)
241 || !driver->bind || !driver->disconnect || !driver->setup)
248 spin_lock_irqsave(&dev->lock, flags);
249 /* first hook up the driver ... */
250 dev->driver = driver;
251 spin_unlock_irqrestore(&dev->lock, flags);
253 if (retval) { /* TODO */
254 printf("target device_add failed, error %d\n", retval);
258 retval = driver->bind(&dev->gadget);
260 debug_cond(DEBUG_SETUP != 0,
261 "%s: bind to driver --> error %d\n",
262 dev->gadget.name, retval);
269 debug_cond(DEBUG_SETUP != 0,
270 "Registered gadget driver %s\n", dev->gadget.name);
277 * Unregister entry point for the peripheral controller driver.
279 int usb_gadget_unregister_driver(struct usb_gadget_driver *driver)
281 struct dwc2_udc *dev = the_controller;
282 unsigned long flags = 0;
286 if (!driver || driver != dev->driver)
289 spin_lock_irqsave(&dev->lock, flags);
291 stop_activity(dev, driver);
292 spin_unlock_irqrestore(&dev->lock, flags);
294 driver->unbind(&dev->gadget);
296 disable_irq(IRQ_OTG);
303 * done - retire a request; caller blocked irqs
305 static void done(struct dwc2_ep *ep, struct dwc2_request *req, int status)
307 unsigned int stopped = ep->stopped;
309 debug("%s: %s %p, req = %p, stopped = %d\n",
310 __func__, ep->ep.name, ep, &req->req, stopped);
312 list_del_init(&req->queue);
314 if (likely(req->req.status == -EINPROGRESS))
315 req->req.status = status;
317 status = req->req.status;
319 if (status && status != -ESHUTDOWN) {
320 debug("complete %s req %p stat %d len %u/%u\n",
321 ep->ep.name, &req->req, status,
322 req->req.actual, req->req.length);
325 /* don't modify queue heads during completion callback */
329 printf("calling complete callback\n");
331 int i, len = req->req.length;
333 printf("pkt[%d] = ", req->req.length);
336 for (i = 0; i < len; i++) {
337 printf("%02x", ((u8 *)req->req.buf)[i]);
344 spin_unlock(&ep->dev->lock);
345 req->req.complete(&ep->ep, &req->req);
346 spin_lock(&ep->dev->lock);
348 debug("callback completed\n");
350 ep->stopped = stopped;
354 * nuke - dequeue ALL requests
356 static void nuke(struct dwc2_ep *ep, int status)
358 struct dwc2_request *req;
360 debug("%s: %s %p\n", __func__, ep->ep.name, ep);
362 /* called with irqs blocked */
363 while (!list_empty(&ep->queue)) {
364 req = list_entry(ep->queue.next, struct dwc2_request, queue);
365 done(ep, req, status);
369 static void stop_activity(struct dwc2_udc *dev,
370 struct usb_gadget_driver *driver)
374 /* don't disconnect drivers more than once */
375 if (dev->gadget.speed == USB_SPEED_UNKNOWN)
377 dev->gadget.speed = USB_SPEED_UNKNOWN;
379 /* prevent new request submissions, kill any outstanding requests */
380 for (i = 0; i < DWC2_MAX_ENDPOINTS; i++) {
381 struct dwc2_ep *ep = &dev->ep[i];
383 nuke(ep, -ESHUTDOWN);
386 /* report disconnect; the driver is already quiesced */
388 spin_unlock(&dev->lock);
389 driver->disconnect(&dev->gadget);
390 spin_lock(&dev->lock);
393 /* re-init driver-visible data structures */
397 static void reconfig_usbd(struct dwc2_udc *dev)
399 /* 2. Soft-reset OTG Core and then unreset again. */
401 unsigned int uTemp = writel(CORE_SOFT_RESET, ®->grstctl);
402 uint32_t dflt_gusbcfg;
403 uint32_t rx_fifo_sz, tx_fifo_sz, np_tx_fifo_sz;
405 debug("Reseting OTG controller\n");
408 0<<15 /* PHY Low Power Clock sel*/
409 |1<<14 /* Non-Periodic TxFIFO Rewind Enable*/
410 |0x5<<10 /* Turnaround time*/
411 |0<<9 | 0<<8 /* [0:HNP disable,1:HNP enable][ 0:SRP disable*/
412 /* 1:SRP enable] H1= 1,1*/
413 |0<<7 /* Ulpi DDR sel*/
414 |0<<6 /* 0: high speed utmi+, 1: full speed serial*/
415 |0<<4 /* 0: utmi+, 1:ulpi*/
416 #ifdef CONFIG_USB_GADGET_DWC2_OTG_PHY_BUS_WIDTH_8
417 |0<<3 /* phy i/f 0:8bit, 1:16bit*/
419 |1<<3 /* phy i/f 0:8bit, 1:16bit*/
421 |0x7<<0; /* HS/FS Timeout**/
423 if (dev->pdata->usb_gusbcfg)
424 dflt_gusbcfg = dev->pdata->usb_gusbcfg;
426 writel(dflt_gusbcfg, ®->gusbcfg);
428 /* 3. Put the OTG device core in the disconnected state.*/
429 uTemp = readl(®->dctl);
430 uTemp |= SOFT_DISCONNECT;
431 writel(uTemp, ®->dctl);
435 /* 4. Make the OTG device core exit from the disconnected state.*/
436 uTemp = readl(®->dctl);
437 uTemp = uTemp & ~SOFT_DISCONNECT;
438 writel(uTemp, ®->dctl);
440 /* 5. Configure OTG Core to initial settings of device mode.*/
441 /* [][1: full speed(30Mhz) 0:high speed]*/
442 writel(EP_MISS_CNT(1) | DEV_SPEED_HIGH_SPEED_20, ®->dcfg);
446 /* 6. Unmask the core interrupts*/
447 writel(GINTMSK_INIT, ®->gintmsk);
449 /* 7. Set NAK bit of EP0, EP1, EP2*/
450 writel(DEPCTL_EPDIS|DEPCTL_SNAK, ®->out_endp[EP0_CON].doepctl);
451 writel(DEPCTL_EPDIS|DEPCTL_SNAK, ®->in_endp[EP0_CON].diepctl);
453 for (i = 1; i < DWC2_MAX_ENDPOINTS; i++) {
454 writel(DEPCTL_EPDIS|DEPCTL_SNAK, ®->out_endp[i].doepctl);
455 writel(DEPCTL_EPDIS|DEPCTL_SNAK, ®->in_endp[i].diepctl);
458 /* 8. Unmask EPO interrupts*/
459 writel(((1 << EP0_CON) << DAINT_OUT_BIT)
460 | (1 << EP0_CON), ®->daintmsk);
462 /* 9. Unmask device OUT EP common interrupts*/
463 writel(DOEPMSK_INIT, ®->doepmsk);
465 /* 10. Unmask device IN EP common interrupts*/
466 writel(DIEPMSK_INIT, ®->diepmsk);
468 rx_fifo_sz = RX_FIFO_SIZE;
469 np_tx_fifo_sz = NPTX_FIFO_SIZE;
470 tx_fifo_sz = PTX_FIFO_SIZE;
472 if (dev->pdata->rx_fifo_sz)
473 rx_fifo_sz = dev->pdata->rx_fifo_sz;
474 if (dev->pdata->np_tx_fifo_sz)
475 np_tx_fifo_sz = dev->pdata->np_tx_fifo_sz;
476 if (dev->pdata->tx_fifo_sz)
477 tx_fifo_sz = dev->pdata->tx_fifo_sz;
479 /* 11. Set Rx FIFO Size (in 32-bit words) */
480 writel(rx_fifo_sz, ®->grxfsiz);
482 /* 12. Set Non Periodic Tx FIFO Size */
483 writel((np_tx_fifo_sz << 16) | rx_fifo_sz,
486 for (i = 1; i < DWC2_MAX_HW_ENDPOINTS; i++)
487 writel((rx_fifo_sz + np_tx_fifo_sz + tx_fifo_sz*(i-1)) |
488 tx_fifo_sz << 16, ®->dieptxf[i-1]);
490 /* Flush the RX FIFO */
491 writel(RX_FIFO_FLUSH, ®->grstctl);
492 while (readl(®->grstctl) & RX_FIFO_FLUSH)
493 debug("%s: waiting for DWC2_UDC_OTG_GRSTCTL\n", __func__);
495 /* Flush all the Tx FIFO's */
496 writel(TX_FIFO_FLUSH_ALL, ®->grstctl);
497 writel(TX_FIFO_FLUSH_ALL | TX_FIFO_FLUSH, ®->grstctl);
498 while (readl(®->grstctl) & TX_FIFO_FLUSH)
499 debug("%s: waiting for DWC2_UDC_OTG_GRSTCTL\n", __func__);
501 /* 13. Clear NAK bit of EP0, EP1, EP2*/
503 /* EP0: Control OUT */
504 writel(DEPCTL_EPDIS | DEPCTL_CNAK,
505 ®->out_endp[EP0_CON].doepctl);
507 /* 14. Initialize OTG Link Core.*/
508 writel(GAHBCFG_INIT, ®->gahbcfg);
511 static void set_max_pktsize(struct dwc2_udc *dev, enum usb_device_speed speed)
513 unsigned int ep_ctrl;
516 if (speed == USB_SPEED_HIGH) {
519 ep_fifo_size2 = 1024;
520 dev->gadget.speed = USB_SPEED_HIGH;
525 dev->gadget.speed = USB_SPEED_FULL;
528 dev->ep[0].ep.maxpacket = ep0_fifo_size;
529 for (i = 1; i < DWC2_MAX_ENDPOINTS; i++)
530 dev->ep[i].ep.maxpacket = ep_fifo_size;
532 /* EP0 - Control IN (64 bytes)*/
533 ep_ctrl = readl(®->in_endp[EP0_CON].diepctl);
534 writel(ep_ctrl|(0<<0), ®->in_endp[EP0_CON].diepctl);
536 /* EP0 - Control OUT (64 bytes)*/
537 ep_ctrl = readl(®->out_endp[EP0_CON].doepctl);
538 writel(ep_ctrl|(0<<0), ®->out_endp[EP0_CON].doepctl);
541 static int dwc2_ep_enable(struct usb_ep *_ep,
542 const struct usb_endpoint_descriptor *desc)
545 struct dwc2_udc *dev;
546 unsigned long flags = 0;
548 debug("%s: %p\n", __func__, _ep);
550 ep = container_of(_ep, struct dwc2_ep, ep);
551 if (!_ep || !desc || ep->desc || _ep->name == ep0name
552 || desc->bDescriptorType != USB_DT_ENDPOINT
553 || ep->bEndpointAddress != desc->bEndpointAddress
554 || ep_maxpacket(ep) <
555 le16_to_cpu(get_unaligned(&desc->wMaxPacketSize))) {
557 debug("%s: bad ep or descriptor\n", __func__);
561 /* xfer types must match, except that interrupt ~= bulk */
562 if (ep->bmAttributes != desc->bmAttributes
563 && ep->bmAttributes != USB_ENDPOINT_XFER_BULK
564 && desc->bmAttributes != USB_ENDPOINT_XFER_INT) {
566 debug("%s: %s type mismatch\n", __func__, _ep->name);
570 /* hardware _could_ do smaller, but driver doesn't */
571 if ((desc->bmAttributes == USB_ENDPOINT_XFER_BULK &&
572 le16_to_cpu(get_unaligned(&desc->wMaxPacketSize)) >
573 ep_maxpacket(ep)) || !get_unaligned(&desc->wMaxPacketSize)) {
575 debug("%s: bad %s maxpacket\n", __func__, _ep->name);
580 if (!dev->driver || dev->gadget.speed == USB_SPEED_UNKNOWN) {
582 debug("%s: bogus device state\n", __func__);
589 ep->ep.maxpacket = le16_to_cpu(get_unaligned(&desc->wMaxPacketSize));
591 /* Reset halt state */
592 dwc2_udc_set_nak(ep);
593 dwc2_udc_set_halt(_ep, 0);
595 spin_lock_irqsave(&ep->dev->lock, flags);
596 dwc2_udc_ep_activate(ep);
597 spin_unlock_irqrestore(&ep->dev->lock, flags);
599 debug("%s: enabled %s, stopped = %d, maxpacket = %d\n",
600 __func__, _ep->name, ep->stopped, ep->ep.maxpacket);
607 static int dwc2_ep_disable(struct usb_ep *_ep)
610 unsigned long flags = 0;
612 debug("%s: %p\n", __func__, _ep);
614 ep = container_of(_ep, struct dwc2_ep, ep);
615 if (!_ep || !ep->desc) {
616 debug("%s: %s not enabled\n", __func__,
617 _ep ? ep->ep.name : NULL);
621 spin_lock_irqsave(&ep->dev->lock, flags);
623 /* Nuke all pending requests */
624 nuke(ep, -ESHUTDOWN);
629 spin_unlock_irqrestore(&ep->dev->lock, flags);
631 debug("%s: disabled %s\n", __func__, _ep->name);
635 static struct usb_request *dwc2_alloc_request(struct usb_ep *ep,
638 struct dwc2_request *req;
640 debug("%s: %s %p\n", __func__, ep->name, ep);
642 req = memalign(CONFIG_SYS_CACHELINE_SIZE, sizeof(*req));
646 memset(req, 0, sizeof *req);
647 INIT_LIST_HEAD(&req->queue);
652 static void dwc2_free_request(struct usb_ep *ep, struct usb_request *_req)
654 struct dwc2_request *req;
656 debug("%s: %p\n", __func__, ep);
658 req = container_of(_req, struct dwc2_request, req);
659 WARN_ON(!list_empty(&req->queue));
663 /* dequeue JUST ONE request */
664 static int dwc2_dequeue(struct usb_ep *_ep, struct usb_request *_req)
667 struct dwc2_request *req;
668 unsigned long flags = 0;
670 debug("%s: %p\n", __func__, _ep);
672 ep = container_of(_ep, struct dwc2_ep, ep);
673 if (!_ep || ep->ep.name == ep0name)
676 spin_lock_irqsave(&ep->dev->lock, flags);
678 /* make sure it's actually queued on this endpoint */
679 list_for_each_entry(req, &ep->queue, queue) {
680 if (&req->req == _req)
683 if (&req->req != _req) {
684 spin_unlock_irqrestore(&ep->dev->lock, flags);
688 done(ep, req, -ECONNRESET);
690 spin_unlock_irqrestore(&ep->dev->lock, flags);
695 * Return bytes in EP FIFO
697 static int dwc2_fifo_status(struct usb_ep *_ep)
702 ep = container_of(_ep, struct dwc2_ep, ep);
704 debug("%s: bad ep\n", __func__);
708 debug("%s: %d\n", __func__, ep_index(ep));
710 /* LPD can't report unclaimed bytes from IN fifos */
720 static void dwc2_fifo_flush(struct usb_ep *_ep)
724 ep = container_of(_ep, struct dwc2_ep, ep);
725 if (unlikely(!_ep || (!ep->desc && ep->ep.name != ep0name))) {
726 debug("%s: bad ep\n", __func__);
730 debug("%s: %d\n", __func__, ep_index(ep));
733 static const struct usb_gadget_ops dwc2_udc_ops = {
734 /* current versions must always be self-powered */
737 static struct dwc2_udc memory = {
740 .ops = &dwc2_udc_ops,
741 .ep0 = &memory.ep[0].ep,
745 /* control endpoint */
750 .maxpacket = EP0_FIFO_SIZE,
754 .bEndpointAddress = 0,
757 .ep_type = ep_control,
760 /* first group of endpoints */
763 .name = "ep1in-bulk",
765 .maxpacket = EP_FIFO_SIZE,
769 .bEndpointAddress = USB_DIR_IN | 1,
770 .bmAttributes = USB_ENDPOINT_XFER_BULK,
772 .ep_type = ep_bulk_out,
778 .name = "ep2out-bulk",
780 .maxpacket = EP_FIFO_SIZE,
784 .bEndpointAddress = USB_DIR_OUT | 2,
785 .bmAttributes = USB_ENDPOINT_XFER_BULK,
787 .ep_type = ep_bulk_in,
795 .maxpacket = EP_FIFO_SIZE,
799 .bEndpointAddress = USB_DIR_IN | 3,
800 .bmAttributes = USB_ENDPOINT_XFER_INT,
802 .ep_type = ep_interrupt,
808 * probe - binds to the platform device
811 int dwc2_udc_probe(struct dwc2_plat_otg_data *pdata)
813 struct dwc2_udc *dev = &memory;
816 debug("%s: %p\n", __func__, pdata);
820 reg = (struct dwc2_usbotg_reg *)pdata->regs_otg;
822 /* regs_otg = (void *)pdata->regs_otg; */
824 dev->gadget.is_dualspeed = 1; /* Hack only*/
825 dev->gadget.is_otg = 0;
826 dev->gadget.is_a_peripheral = 0;
827 dev->gadget.b_hnp_enable = 0;
828 dev->gadget.a_hnp_support = 0;
829 dev->gadget.a_alt_hnp_support = 0;
831 the_controller = dev;
833 usb_ctrl = memalign(CONFIG_SYS_CACHELINE_SIZE,
834 ROUND(sizeof(struct usb_ctrlrequest),
835 CONFIG_SYS_CACHELINE_SIZE));
837 pr_err("No memory available for UDC!\n");
841 usb_ctrl_dma_addr = (dma_addr_t) usb_ctrl;
848 int usb_gadget_handle_interrupts(int index)
850 u32 intr_status = readl(®->gintsts);
851 u32 gintmsk = readl(®->gintmsk);
853 if (intr_status & gintmsk)
854 return dwc2_udc_irq(1, (void *)the_controller);