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>
23 #include <generic-phy.h>
27 #include <dm/device_compat.h>
28 #include <dm/devres.h>
29 #include <linux/bug.h>
31 #include <linux/errno.h>
32 #include <linux/list.h>
34 #include <linux/usb/ch9.h>
35 #include <linux/usb/otg.h>
36 #include <linux/usb/gadget.h>
39 #include <asm/byteorder.h>
40 #include <asm/unaligned.h>
43 #include <asm/mach-types.h>
45 #include <power/regulator.h>
47 #include "dwc2_udc_otg_regs.h"
48 #include "dwc2_udc_otg_priv.h"
50 /***********************************************************/
52 #define OTG_DMA_MODE 1
57 #define DEBUG_OUT_EP 0
60 #include <usb/dwc2_udc.h>
65 static char *state_names[] = {
68 "DATA_STATE_NEED_ZLP",
69 "WAIT_FOR_OUT_STATUS",
72 "WAIT_FOR_OUT_COMPLETE",
73 "WAIT_FOR_IN_COMPLETE",
74 "WAIT_FOR_NULL_COMPLETE",
77 #define DRIVER_VERSION "15 March 2009"
79 struct dwc2_udc *the_controller;
81 static const char driver_name[] = "dwc2-udc";
82 static const char ep0name[] = "ep0-control";
85 static unsigned int ep0_fifo_size = 64;
86 static unsigned int ep_fifo_size = 512;
87 static unsigned int ep_fifo_size2 = 1024;
88 static int reset_available = 1;
90 static struct usb_ctrlrequest *usb_ctrl;
91 static dma_addr_t usb_ctrl_dma_addr;
96 static int dwc2_ep_enable(struct usb_ep *ep,
97 const struct usb_endpoint_descriptor *);
98 static int dwc2_ep_disable(struct usb_ep *ep);
99 static struct usb_request *dwc2_alloc_request(struct usb_ep *ep,
101 static void dwc2_free_request(struct usb_ep *ep, struct usb_request *);
103 static int dwc2_queue(struct usb_ep *ep, struct usb_request *, gfp_t gfp_flags);
104 static int dwc2_dequeue(struct usb_ep *ep, struct usb_request *);
105 static int dwc2_fifo_status(struct usb_ep *ep);
106 static void dwc2_fifo_flush(struct usb_ep *ep);
107 static void dwc2_ep0_read(struct dwc2_udc *dev);
108 static void dwc2_ep0_kick(struct dwc2_udc *dev, struct dwc2_ep *ep);
109 static void dwc2_handle_ep0(struct dwc2_udc *dev);
110 static int dwc2_ep0_write(struct dwc2_udc *dev);
111 static int write_fifo_ep0(struct dwc2_ep *ep, struct dwc2_request *req);
112 static void done(struct dwc2_ep *ep, struct dwc2_request *req, int status);
113 static void stop_activity(struct dwc2_udc *dev,
114 struct usb_gadget_driver *driver);
115 static int udc_enable(struct dwc2_udc *dev);
116 static void udc_set_address(struct dwc2_udc *dev, unsigned char address);
117 static void reconfig_usbd(struct dwc2_udc *dev);
118 static void set_max_pktsize(struct dwc2_udc *dev, enum usb_device_speed speed);
119 static void nuke(struct dwc2_ep *ep, int status);
120 static int dwc2_udc_set_halt(struct usb_ep *_ep, int value);
121 static void dwc2_udc_set_nak(struct dwc2_ep *ep);
123 void set_udc_gadget_private_data(void *p)
125 debug_cond(DEBUG_SETUP != 0,
126 "%s: the_controller: 0x%p, p: 0x%p\n", __func__,
128 the_controller->gadget.dev.device_data = p;
131 void *get_udc_gadget_private_data(struct usb_gadget *gadget)
133 return gadget->dev.device_data;
136 static struct usb_ep_ops dwc2_ep_ops = {
137 .enable = dwc2_ep_enable,
138 .disable = dwc2_ep_disable,
140 .alloc_request = dwc2_alloc_request,
141 .free_request = dwc2_free_request,
144 .dequeue = dwc2_dequeue,
146 .set_halt = dwc2_udc_set_halt,
147 .fifo_status = dwc2_fifo_status,
148 .fifo_flush = dwc2_fifo_flush,
151 #define create_proc_files() do {} while (0)
152 #define remove_proc_files() do {} while (0)
154 /***********************************************************/
156 struct dwc2_usbotg_reg *reg;
158 bool dfu_usb_get_reset(void)
160 return !!(readl(®->gintsts) & INT_RESET);
163 __weak void otg_phy_init(struct dwc2_udc *dev) {}
164 __weak void otg_phy_off(struct dwc2_udc *dev) {}
166 /***********************************************************/
168 #include "dwc2_udc_otg_xfer_dma.c"
171 * udc_disable - disable USB device controller
173 static void udc_disable(struct dwc2_udc *dev)
175 debug_cond(DEBUG_SETUP != 0, "%s: %p\n", __func__, dev);
177 udc_set_address(dev, 0);
179 dev->ep0state = WAIT_FOR_SETUP;
180 dev->gadget.speed = USB_SPEED_UNKNOWN;
181 dev->usb_address = 0;
187 * udc_reinit - initialize software state
189 static void udc_reinit(struct dwc2_udc *dev)
193 debug_cond(DEBUG_SETUP != 0, "%s: %p\n", __func__, dev);
195 /* device/ep0 records init */
196 INIT_LIST_HEAD(&dev->gadget.ep_list);
197 INIT_LIST_HEAD(&dev->gadget.ep0->ep_list);
198 dev->ep0state = WAIT_FOR_SETUP;
200 /* basic endpoint records init */
201 for (i = 0; i < DWC2_MAX_ENDPOINTS; i++) {
202 struct dwc2_ep *ep = &dev->ep[i];
205 list_add_tail(&ep->ep.ep_list, &dev->gadget.ep_list);
209 INIT_LIST_HEAD(&ep->queue);
213 /* the rest was statically initialized, and is read-only */
216 #define BYTES2MAXP(x) (x / 8)
217 #define MAXP2BYTES(x) (x * 8)
219 /* until it's enabled, this UDC should be completely invisible
222 static int udc_enable(struct dwc2_udc *dev)
224 debug_cond(DEBUG_SETUP != 0, "%s: %p\n", __func__, dev);
229 debug_cond(DEBUG_SETUP != 0,
230 "DWC2 USB 2.0 OTG Controller Core Initialized : 0x%x\n",
231 readl(®->gintmsk));
233 dev->gadget.speed = USB_SPEED_UNKNOWN;
238 #if !CONFIG_IS_ENABLED(DM_USB_GADGET)
240 Register entry point for the peripheral controller driver.
242 int usb_gadget_register_driver(struct usb_gadget_driver *driver)
244 struct dwc2_udc *dev = the_controller;
246 unsigned long flags = 0;
248 debug_cond(DEBUG_SETUP != 0, "%s: %s\n", __func__, "no name");
251 || (driver->speed != USB_SPEED_FULL
252 && driver->speed != USB_SPEED_HIGH)
253 || !driver->bind || !driver->disconnect || !driver->setup)
260 spin_lock_irqsave(&dev->lock, flags);
261 /* first hook up the driver ... */
262 dev->driver = driver;
263 spin_unlock_irqrestore(&dev->lock, flags);
265 if (retval) { /* TODO */
266 printf("target device_add failed, error %d\n", retval);
270 retval = driver->bind(&dev->gadget);
272 debug_cond(DEBUG_SETUP != 0,
273 "%s: bind to driver --> error %d\n",
274 dev->gadget.name, retval);
281 debug_cond(DEBUG_SETUP != 0,
282 "Registered gadget driver %s\n", dev->gadget.name);
289 * Unregister entry point for the peripheral controller driver.
291 int usb_gadget_unregister_driver(struct usb_gadget_driver *driver)
293 struct dwc2_udc *dev = the_controller;
294 unsigned long flags = 0;
298 if (!driver || driver != dev->driver)
301 spin_lock_irqsave(&dev->lock, flags);
303 stop_activity(dev, driver);
304 spin_unlock_irqrestore(&dev->lock, flags);
306 driver->unbind(&dev->gadget);
308 disable_irq(IRQ_OTG);
313 #else /* !CONFIG_IS_ENABLED(DM_USB_GADGET) */
315 static int dwc2_gadget_start(struct usb_gadget *g,
316 struct usb_gadget_driver *driver)
318 struct dwc2_udc *dev = the_controller;
320 debug_cond(DEBUG_SETUP != 0, "%s: %s\n", __func__, "no name");
323 (driver->speed != USB_SPEED_FULL &&
324 driver->speed != USB_SPEED_HIGH) ||
325 !driver->bind || !driver->disconnect || !driver->setup)
334 /* first hook up the driver ... */
335 dev->driver = driver;
337 debug_cond(DEBUG_SETUP != 0,
338 "Registered gadget driver %s\n", dev->gadget.name);
339 return udc_enable(dev);
342 static int dwc2_gadget_stop(struct usb_gadget *g)
344 struct dwc2_udc *dev = the_controller;
353 stop_activity(dev, dev->driver);
360 #endif /* !CONFIG_IS_ENABLED(DM_USB_GADGET) */
363 * done - retire a request; caller blocked irqs
365 static void done(struct dwc2_ep *ep, struct dwc2_request *req, int status)
367 unsigned int stopped = ep->stopped;
369 debug("%s: %s %p, req = %p, stopped = %d\n",
370 __func__, ep->ep.name, ep, &req->req, stopped);
372 list_del_init(&req->queue);
374 if (likely(req->req.status == -EINPROGRESS))
375 req->req.status = status;
377 status = req->req.status;
379 if (status && status != -ESHUTDOWN) {
380 debug("complete %s req %p stat %d len %u/%u\n",
381 ep->ep.name, &req->req, status,
382 req->req.actual, req->req.length);
385 /* don't modify queue heads during completion callback */
389 printf("calling complete callback\n");
391 int i, len = req->req.length;
393 printf("pkt[%d] = ", req->req.length);
396 for (i = 0; i < len; i++) {
397 printf("%02x", ((u8 *)req->req.buf)[i]);
404 spin_unlock(&ep->dev->lock);
405 req->req.complete(&ep->ep, &req->req);
406 spin_lock(&ep->dev->lock);
408 debug("callback completed\n");
410 ep->stopped = stopped;
414 * nuke - dequeue ALL requests
416 static void nuke(struct dwc2_ep *ep, int status)
418 struct dwc2_request *req;
420 debug("%s: %s %p\n", __func__, ep->ep.name, ep);
422 /* called with irqs blocked */
423 while (!list_empty(&ep->queue)) {
424 req = list_entry(ep->queue.next, struct dwc2_request, queue);
425 done(ep, req, status);
429 static void stop_activity(struct dwc2_udc *dev,
430 struct usb_gadget_driver *driver)
434 /* don't disconnect drivers more than once */
435 if (dev->gadget.speed == USB_SPEED_UNKNOWN)
437 dev->gadget.speed = USB_SPEED_UNKNOWN;
439 /* prevent new request submissions, kill any outstanding requests */
440 for (i = 0; i < DWC2_MAX_ENDPOINTS; i++) {
441 struct dwc2_ep *ep = &dev->ep[i];
443 nuke(ep, -ESHUTDOWN);
446 /* report disconnect; the driver is already quiesced */
448 spin_unlock(&dev->lock);
449 driver->disconnect(&dev->gadget);
450 spin_lock(&dev->lock);
453 /* re-init driver-visible data structures */
457 static void reconfig_usbd(struct dwc2_udc *dev)
459 /* 2. Soft-reset OTG Core and then unreset again. */
461 unsigned int uTemp = writel(CORE_SOFT_RESET, ®->grstctl);
462 uint32_t dflt_gusbcfg;
463 uint32_t rx_fifo_sz, tx_fifo_sz, np_tx_fifo_sz;
467 debug("Reseting OTG controller\n");
470 0<<15 /* PHY Low Power Clock sel*/
471 |1<<14 /* Non-Periodic TxFIFO Rewind Enable*/
472 |0x5<<10 /* Turnaround time*/
473 |0<<9 | 0<<8 /* [0:HNP disable,1:HNP enable][ 0:SRP disable*/
474 /* 1:SRP enable] H1= 1,1*/
475 |0<<7 /* Ulpi DDR sel*/
476 |0<<6 /* 0: high speed utmi+, 1: full speed serial*/
477 |0<<4 /* 0: utmi+, 1:ulpi*/
478 #ifdef CONFIG_USB_GADGET_DWC2_OTG_PHY_BUS_WIDTH_8
479 |0<<3 /* phy i/f 0:8bit, 1:16bit*/
481 |1<<3 /* phy i/f 0:8bit, 1:16bit*/
483 |0x7<<0; /* HS/FS Timeout**/
485 if (dev->pdata->usb_gusbcfg)
486 dflt_gusbcfg = dev->pdata->usb_gusbcfg;
488 writel(dflt_gusbcfg, ®->gusbcfg);
490 /* 3. Put the OTG device core in the disconnected state.*/
491 uTemp = readl(®->dctl);
492 uTemp |= SOFT_DISCONNECT;
493 writel(uTemp, ®->dctl);
497 /* 4. Make the OTG device core exit from the disconnected state.*/
498 uTemp = readl(®->dctl);
499 uTemp = uTemp & ~SOFT_DISCONNECT;
500 writel(uTemp, ®->dctl);
502 /* 5. Configure OTG Core to initial settings of device mode.*/
503 /* [][1: full speed(30Mhz) 0:high speed]*/
504 writel(EP_MISS_CNT(1) | DEV_SPEED_HIGH_SPEED_20, ®->dcfg);
508 /* 6. Unmask the core interrupts*/
509 writel(GINTMSK_INIT, ®->gintmsk);
511 /* 7. Set NAK bit of EP0, EP1, EP2*/
512 writel(DEPCTL_EPDIS|DEPCTL_SNAK, ®->out_endp[EP0_CON].doepctl);
513 writel(DEPCTL_EPDIS|DEPCTL_SNAK, ®->in_endp[EP0_CON].diepctl);
515 for (i = 1; i < DWC2_MAX_ENDPOINTS; i++) {
516 writel(DEPCTL_EPDIS|DEPCTL_SNAK, ®->out_endp[i].doepctl);
517 writel(DEPCTL_EPDIS|DEPCTL_SNAK, ®->in_endp[i].diepctl);
520 /* 8. Unmask EPO interrupts*/
521 writel(((1 << EP0_CON) << DAINT_OUT_BIT)
522 | (1 << EP0_CON), ®->daintmsk);
524 /* 9. Unmask device OUT EP common interrupts*/
525 writel(DOEPMSK_INIT, ®->doepmsk);
527 /* 10. Unmask device IN EP common interrupts*/
528 writel(DIEPMSK_INIT, ®->diepmsk);
530 rx_fifo_sz = RX_FIFO_SIZE;
531 np_tx_fifo_sz = NPTX_FIFO_SIZE;
532 tx_fifo_sz = PTX_FIFO_SIZE;
534 if (dev->pdata->rx_fifo_sz)
535 rx_fifo_sz = dev->pdata->rx_fifo_sz;
536 if (dev->pdata->np_tx_fifo_sz)
537 np_tx_fifo_sz = dev->pdata->np_tx_fifo_sz;
538 if (dev->pdata->tx_fifo_sz)
539 tx_fifo_sz = dev->pdata->tx_fifo_sz;
541 /* 11. Set Rx FIFO Size (in 32-bit words) */
542 writel(rx_fifo_sz, ®->grxfsiz);
544 /* 12. Set Non Periodic Tx FIFO Size */
545 writel((np_tx_fifo_sz << 16) | rx_fifo_sz,
548 /* retrieve the number of IN Endpoints (excluding ep0) */
549 max_hw_ep = (readl(®->ghwcfg4) & GHWCFG4_NUM_IN_EPS_MASK) >>
550 GHWCFG4_NUM_IN_EPS_SHIFT;
551 pdata_hw_ep = dev->pdata->tx_fifo_sz_nb;
553 /* tx_fifo_sz_nb should equal to number of IN Endpoint */
554 if (pdata_hw_ep && max_hw_ep != pdata_hw_ep)
555 pr_warn("Got %d hw endpoint but %d tx-fifo-size in array !!\n",
556 max_hw_ep, pdata_hw_ep);
558 for (i = 0; i < max_hw_ep; i++) {
560 tx_fifo_sz = dev->pdata->tx_fifo_sz_array[i];
562 writel((rx_fifo_sz + np_tx_fifo_sz + (tx_fifo_sz * i)) |
563 tx_fifo_sz << 16, ®->dieptxf[i]);
565 /* Flush the RX FIFO */
566 writel(RX_FIFO_FLUSH, ®->grstctl);
567 while (readl(®->grstctl) & RX_FIFO_FLUSH)
568 debug("%s: waiting for DWC2_UDC_OTG_GRSTCTL\n", __func__);
570 /* Flush all the Tx FIFO's */
571 writel(TX_FIFO_FLUSH_ALL, ®->grstctl);
572 writel(TX_FIFO_FLUSH_ALL | TX_FIFO_FLUSH, ®->grstctl);
573 while (readl(®->grstctl) & TX_FIFO_FLUSH)
574 debug("%s: waiting for DWC2_UDC_OTG_GRSTCTL\n", __func__);
576 /* 13. Clear NAK bit of EP0, EP1, EP2*/
578 /* EP0: Control OUT */
579 writel(DEPCTL_EPDIS | DEPCTL_CNAK,
580 ®->out_endp[EP0_CON].doepctl);
582 /* 14. Initialize OTG Link Core.*/
583 writel(GAHBCFG_INIT, ®->gahbcfg);
586 static void set_max_pktsize(struct dwc2_udc *dev, enum usb_device_speed speed)
588 unsigned int ep_ctrl;
591 if (speed == USB_SPEED_HIGH) {
594 ep_fifo_size2 = 1024;
595 dev->gadget.speed = USB_SPEED_HIGH;
600 dev->gadget.speed = USB_SPEED_FULL;
603 dev->ep[0].ep.maxpacket = ep0_fifo_size;
604 for (i = 1; i < DWC2_MAX_ENDPOINTS; i++)
605 dev->ep[i].ep.maxpacket = ep_fifo_size;
607 /* EP0 - Control IN (64 bytes)*/
608 ep_ctrl = readl(®->in_endp[EP0_CON].diepctl);
609 writel(ep_ctrl|(0<<0), ®->in_endp[EP0_CON].diepctl);
611 /* EP0 - Control OUT (64 bytes)*/
612 ep_ctrl = readl(®->out_endp[EP0_CON].doepctl);
613 writel(ep_ctrl|(0<<0), ®->out_endp[EP0_CON].doepctl);
616 static int dwc2_ep_enable(struct usb_ep *_ep,
617 const struct usb_endpoint_descriptor *desc)
620 struct dwc2_udc *dev;
621 unsigned long flags = 0;
623 debug("%s: %p\n", __func__, _ep);
625 ep = container_of(_ep, struct dwc2_ep, ep);
626 if (!_ep || !desc || ep->desc || _ep->name == ep0name
627 || desc->bDescriptorType != USB_DT_ENDPOINT
628 || ep->bEndpointAddress != desc->bEndpointAddress
629 || ep_maxpacket(ep) <
630 le16_to_cpu(get_unaligned(&desc->wMaxPacketSize))) {
632 debug("%s: bad ep or descriptor\n", __func__);
636 /* xfer types must match, except that interrupt ~= bulk */
637 if (ep->bmAttributes != desc->bmAttributes
638 && ep->bmAttributes != USB_ENDPOINT_XFER_BULK
639 && desc->bmAttributes != USB_ENDPOINT_XFER_INT) {
641 debug("%s: %s type mismatch\n", __func__, _ep->name);
645 /* hardware _could_ do smaller, but driver doesn't */
646 if ((desc->bmAttributes == USB_ENDPOINT_XFER_BULK &&
647 le16_to_cpu(get_unaligned(&desc->wMaxPacketSize)) >
648 ep_maxpacket(ep)) || !get_unaligned(&desc->wMaxPacketSize)) {
650 debug("%s: bad %s maxpacket\n", __func__, _ep->name);
655 if (!dev->driver || dev->gadget.speed == USB_SPEED_UNKNOWN) {
657 debug("%s: bogus device state\n", __func__);
664 ep->ep.maxpacket = le16_to_cpu(get_unaligned(&desc->wMaxPacketSize));
666 /* Reset halt state */
667 dwc2_udc_set_nak(ep);
668 dwc2_udc_set_halt(_ep, 0);
670 spin_lock_irqsave(&ep->dev->lock, flags);
671 dwc2_udc_ep_activate(ep);
672 spin_unlock_irqrestore(&ep->dev->lock, flags);
674 debug("%s: enabled %s, stopped = %d, maxpacket = %d\n",
675 __func__, _ep->name, ep->stopped, ep->ep.maxpacket);
682 static int dwc2_ep_disable(struct usb_ep *_ep)
685 unsigned long flags = 0;
687 debug("%s: %p\n", __func__, _ep);
689 ep = container_of(_ep, struct dwc2_ep, ep);
690 if (!_ep || !ep->desc) {
691 debug("%s: %s not enabled\n", __func__,
692 _ep ? ep->ep.name : NULL);
696 spin_lock_irqsave(&ep->dev->lock, flags);
698 /* Nuke all pending requests */
699 nuke(ep, -ESHUTDOWN);
704 spin_unlock_irqrestore(&ep->dev->lock, flags);
706 debug("%s: disabled %s\n", __func__, _ep->name);
710 static struct usb_request *dwc2_alloc_request(struct usb_ep *ep,
713 struct dwc2_request *req;
715 debug("%s: %s %p\n", __func__, ep->name, ep);
717 req = memalign(CONFIG_SYS_CACHELINE_SIZE, sizeof(*req));
721 memset(req, 0, sizeof *req);
722 INIT_LIST_HEAD(&req->queue);
727 static void dwc2_free_request(struct usb_ep *ep, struct usb_request *_req)
729 struct dwc2_request *req;
731 debug("%s: %p\n", __func__, ep);
733 req = container_of(_req, struct dwc2_request, req);
734 WARN_ON(!list_empty(&req->queue));
738 /* dequeue JUST ONE request */
739 static int dwc2_dequeue(struct usb_ep *_ep, struct usb_request *_req)
742 struct dwc2_request *req;
743 unsigned long flags = 0;
745 debug("%s: %p\n", __func__, _ep);
747 ep = container_of(_ep, struct dwc2_ep, ep);
748 if (!_ep || ep->ep.name == ep0name)
751 spin_lock_irqsave(&ep->dev->lock, flags);
753 /* make sure it's actually queued on this endpoint */
754 list_for_each_entry(req, &ep->queue, queue) {
755 if (&req->req == _req)
758 if (&req->req != _req) {
759 spin_unlock_irqrestore(&ep->dev->lock, flags);
763 done(ep, req, -ECONNRESET);
765 spin_unlock_irqrestore(&ep->dev->lock, flags);
770 * Return bytes in EP FIFO
772 static int dwc2_fifo_status(struct usb_ep *_ep)
777 ep = container_of(_ep, struct dwc2_ep, ep);
779 debug("%s: bad ep\n", __func__);
783 debug("%s: %d\n", __func__, ep_index(ep));
785 /* LPD can't report unclaimed bytes from IN fifos */
795 static void dwc2_fifo_flush(struct usb_ep *_ep)
799 ep = container_of(_ep, struct dwc2_ep, ep);
800 if (unlikely(!_ep || (!ep->desc && ep->ep.name != ep0name))) {
801 debug("%s: bad ep\n", __func__);
805 debug("%s: %d\n", __func__, ep_index(ep));
808 static const struct usb_gadget_ops dwc2_udc_ops = {
809 /* current versions must always be self-powered */
810 #if CONFIG_IS_ENABLED(DM_USB_GADGET)
811 .udc_start = dwc2_gadget_start,
812 .udc_stop = dwc2_gadget_stop,
816 static struct dwc2_udc memory = {
819 .ops = &dwc2_udc_ops,
820 .ep0 = &memory.ep[0].ep,
824 /* control endpoint */
829 .maxpacket = EP0_FIFO_SIZE,
833 .bEndpointAddress = 0,
836 .ep_type = ep_control,
839 /* first group of endpoints */
842 .name = "ep1in-bulk",
844 .maxpacket = EP_FIFO_SIZE,
848 .bEndpointAddress = USB_DIR_IN | 1,
849 .bmAttributes = USB_ENDPOINT_XFER_BULK,
851 .ep_type = ep_bulk_out,
857 .name = "ep2out-bulk",
859 .maxpacket = EP_FIFO_SIZE,
863 .bEndpointAddress = USB_DIR_OUT | 2,
864 .bmAttributes = USB_ENDPOINT_XFER_BULK,
866 .ep_type = ep_bulk_in,
874 .maxpacket = EP_FIFO_SIZE,
878 .bEndpointAddress = USB_DIR_IN | 3,
879 .bmAttributes = USB_ENDPOINT_XFER_INT,
881 .ep_type = ep_interrupt,
887 * probe - binds to the platform device
890 int dwc2_udc_probe(struct dwc2_plat_otg_data *pdata)
892 struct dwc2_udc *dev = &memory;
895 debug("%s: %p\n", __func__, pdata);
899 reg = (struct dwc2_usbotg_reg *)pdata->regs_otg;
901 dev->gadget.is_dualspeed = 1; /* Hack only*/
902 dev->gadget.is_otg = 0;
903 dev->gadget.is_a_peripheral = 0;
904 dev->gadget.b_hnp_enable = 0;
905 dev->gadget.a_hnp_support = 0;
906 dev->gadget.a_alt_hnp_support = 0;
908 the_controller = dev;
910 usb_ctrl = memalign(CONFIG_SYS_CACHELINE_SIZE,
911 ROUND(sizeof(struct usb_ctrlrequest),
912 CONFIG_SYS_CACHELINE_SIZE));
914 pr_err("No memory available for UDC!\n");
918 usb_ctrl_dma_addr = (dma_addr_t) usb_ctrl;
925 int dwc2_udc_handle_interrupt(void)
927 u32 intr_status = readl(®->gintsts);
928 u32 gintmsk = readl(®->gintmsk);
930 if (intr_status & gintmsk)
931 return dwc2_udc_irq(1, (void *)the_controller);
936 #if !CONFIG_IS_ENABLED(DM_USB_GADGET)
938 int usb_gadget_handle_interrupts(int index)
940 return dwc2_udc_handle_interrupt();
943 #else /* CONFIG_IS_ENABLED(DM_USB_GADGET) */
945 struct dwc2_priv_data {
946 struct clk_bulk clks;
947 struct reset_ctl_bulk resets;
948 struct phy_bulk phys;
949 struct udevice *usb33d_supply;
952 int dm_usb_gadget_handle_interrupts(struct udevice *dev)
954 return dwc2_udc_handle_interrupt();
957 static int dwc2_phy_setup(struct udevice *dev, struct phy_bulk *phys)
961 ret = generic_phy_get_bulk(dev, phys);
965 ret = generic_phy_init_bulk(phys);
969 ret = generic_phy_power_on_bulk(phys);
971 generic_phy_exit_bulk(phys);
976 static void dwc2_phy_shutdown(struct udevice *dev, struct phy_bulk *phys)
978 generic_phy_power_off_bulk(phys);
979 generic_phy_exit_bulk(phys);
982 static int dwc2_udc_otg_ofdata_to_platdata(struct udevice *dev)
984 struct dwc2_plat_otg_data *platdata = dev_get_platdata(dev);
986 void (*set_params)(struct dwc2_plat_otg_data *data);
989 if (usb_get_dr_mode(dev->node) != USB_DR_MODE_PERIPHERAL &&
990 usb_get_dr_mode(dev->node) != USB_DR_MODE_OTG) {
991 dev_dbg(dev, "Invalid mode\n");
995 platdata->regs_otg = dev_read_addr(dev);
997 platdata->rx_fifo_sz = dev_read_u32_default(dev, "g-rx-fifo-size", 0);
998 platdata->np_tx_fifo_sz = dev_read_u32_default(dev,
999 "g-np-tx-fifo-size", 0);
1001 platdata->tx_fifo_sz_nb =
1002 dev_read_size(dev, "g-tx-fifo-size") / sizeof(u32);
1003 if (platdata->tx_fifo_sz_nb > DWC2_MAX_HW_ENDPOINTS)
1004 platdata->tx_fifo_sz_nb = DWC2_MAX_HW_ENDPOINTS;
1005 if (platdata->tx_fifo_sz_nb) {
1006 ret = dev_read_u32_array(dev, "g-tx-fifo-size",
1007 platdata->tx_fifo_sz_array,
1008 platdata->tx_fifo_sz_nb);
1013 platdata->force_b_session_valid =
1014 dev_read_bool(dev, "u-boot,force-b-session-valid");
1016 /* force platdata according compatible */
1017 drvdata = dev_get_driver_data(dev);
1019 set_params = (void *)drvdata;
1020 set_params(platdata);
1026 static void dwc2_set_stm32mp1_hsotg_params(struct dwc2_plat_otg_data *p)
1028 p->activate_stm_id_vb_detection = true;
1030 0 << 15 /* PHY Low Power Clock sel*/
1031 | 0x9 << 10 /* USB Turnaround time (0x9 for HS phy) */
1032 | 0 << 9 /* [0:HNP disable,1:HNP enable]*/
1033 | 0 << 8 /* [0:SRP disable 1:SRP enable]*/
1034 | 0 << 6 /* 0: high speed utmi+, 1: full speed serial*/
1035 | 0x7 << 0; /* FS timeout calibration**/
1037 if (p->force_b_session_valid)
1038 p->usb_gusbcfg |= 1 << 30; /* FDMOD: Force device mode */
1041 static int dwc2_udc_otg_reset_init(struct udevice *dev,
1042 struct reset_ctl_bulk *resets)
1046 ret = reset_get_bulk(dev, resets);
1047 if (ret == -ENOTSUPP)
1053 ret = reset_assert_bulk(resets);
1057 ret = reset_deassert_bulk(resets);
1060 reset_release_bulk(resets);
1067 static int dwc2_udc_otg_clk_init(struct udevice *dev,
1068 struct clk_bulk *clks)
1072 ret = clk_get_bulk(dev, clks);
1079 ret = clk_enable_bulk(clks);
1081 clk_release_bulk(clks);
1088 static int dwc2_udc_otg_probe(struct udevice *dev)
1090 struct dwc2_plat_otg_data *platdata = dev_get_platdata(dev);
1091 struct dwc2_priv_data *priv = dev_get_priv(dev);
1092 struct dwc2_usbotg_reg *usbotg_reg =
1093 (struct dwc2_usbotg_reg *)platdata->regs_otg;
1096 ret = dwc2_udc_otg_clk_init(dev, &priv->clks);
1100 ret = dwc2_udc_otg_reset_init(dev, &priv->resets);
1104 ret = dwc2_phy_setup(dev, &priv->phys);
1108 if (CONFIG_IS_ENABLED(DM_REGULATOR) &&
1109 platdata->activate_stm_id_vb_detection &&
1110 !platdata->force_b_session_valid) {
1111 ret = device_get_supply_regulator(dev, "usb33d-supply",
1112 &priv->usb33d_supply);
1114 dev_err(dev, "can't get voltage level detector supply\n");
1117 ret = regulator_set_enable(priv->usb33d_supply, true);
1119 dev_err(dev, "can't enable voltage level detector supply\n");
1122 /* Enable vbus sensing */
1123 setbits_le32(&usbotg_reg->ggpio,
1124 GGPIO_STM32_OTG_GCCFG_VBDEN |
1125 GGPIO_STM32_OTG_GCCFG_IDEN);
1128 if (platdata->force_b_session_valid)
1129 /* Override B session bits : value and enable */
1130 setbits_le32(&usbotg_reg->gotgctl,
1131 A_VALOEN | A_VALOVAL | B_VALOEN | B_VALOVAL);
1133 ret = dwc2_udc_probe(platdata);
1137 the_controller->driver = 0;
1139 ret = usb_add_gadget_udc((struct device *)dev, &the_controller->gadget);
1144 static int dwc2_udc_otg_remove(struct udevice *dev)
1146 struct dwc2_priv_data *priv = dev_get_priv(dev);
1148 usb_del_gadget_udc(&the_controller->gadget);
1150 reset_release_bulk(&priv->resets);
1152 clk_release_bulk(&priv->clks);
1154 dwc2_phy_shutdown(dev, &priv->phys);
1156 return dm_scan_fdt_dev(dev);
1159 static const struct udevice_id dwc2_udc_otg_ids[] = {
1160 { .compatible = "snps,dwc2" },
1161 { .compatible = "brcm,bcm2835-usb" },
1162 { .compatible = "st,stm32mp1-hsotg",
1163 .data = (ulong)dwc2_set_stm32mp1_hsotg_params },
1167 U_BOOT_DRIVER(dwc2_udc_otg) = {
1168 .name = "dwc2-udc-otg",
1169 .id = UCLASS_USB_GADGET_GENERIC,
1170 .of_match = dwc2_udc_otg_ids,
1171 .ofdata_to_platdata = dwc2_udc_otg_ofdata_to_platdata,
1172 .probe = dwc2_udc_otg_probe,
1173 .remove = dwc2_udc_otg_remove,
1174 .platdata_auto_alloc_size = sizeof(struct dwc2_plat_otg_data),
1175 .priv_auto_alloc_size = sizeof(struct dwc2_priv_data),
1178 int dwc2_udc_B_session_valid(struct udevice *dev)
1180 struct dwc2_plat_otg_data *platdata = dev_get_platdata(dev);
1181 struct dwc2_usbotg_reg *usbotg_reg =
1182 (struct dwc2_usbotg_reg *)platdata->regs_otg;
1184 return readl(&usbotg_reg->gotgctl) & B_SESSION_VALID;
1186 #endif /* CONFIG_IS_ENABLED(DM_USB_GADGET) */