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 <linux/errno.h>
28 #include <linux/list.h>
30 #include <linux/usb/ch9.h>
31 #include <linux/usb/otg.h>
32 #include <linux/usb/gadget.h>
35 #include <asm/byteorder.h>
36 #include <asm/unaligned.h>
39 #include <asm/mach-types.h>
41 #include <power/regulator.h>
43 #include "dwc2_udc_otg_regs.h"
44 #include "dwc2_udc_otg_priv.h"
46 /***********************************************************/
48 #define OTG_DMA_MODE 1
53 #define DEBUG_OUT_EP 0
56 #include <usb/dwc2_udc.h>
61 static char *state_names[] = {
64 "DATA_STATE_NEED_ZLP",
65 "WAIT_FOR_OUT_STATUS",
68 "WAIT_FOR_OUT_COMPLETE",
69 "WAIT_FOR_IN_COMPLETE",
70 "WAIT_FOR_NULL_COMPLETE",
73 #define DRIVER_VERSION "15 March 2009"
75 struct dwc2_udc *the_controller;
77 static const char driver_name[] = "dwc2-udc";
78 static const char ep0name[] = "ep0-control";
81 static unsigned int ep0_fifo_size = 64;
82 static unsigned int ep_fifo_size = 512;
83 static unsigned int ep_fifo_size2 = 1024;
84 static int reset_available = 1;
86 static struct usb_ctrlrequest *usb_ctrl;
87 static dma_addr_t usb_ctrl_dma_addr;
92 static int dwc2_ep_enable(struct usb_ep *ep,
93 const struct usb_endpoint_descriptor *);
94 static int dwc2_ep_disable(struct usb_ep *ep);
95 static struct usb_request *dwc2_alloc_request(struct usb_ep *ep,
97 static void dwc2_free_request(struct usb_ep *ep, struct usb_request *);
99 static int dwc2_queue(struct usb_ep *ep, struct usb_request *, gfp_t gfp_flags);
100 static int dwc2_dequeue(struct usb_ep *ep, struct usb_request *);
101 static int dwc2_fifo_status(struct usb_ep *ep);
102 static void dwc2_fifo_flush(struct usb_ep *ep);
103 static void dwc2_ep0_read(struct dwc2_udc *dev);
104 static void dwc2_ep0_kick(struct dwc2_udc *dev, struct dwc2_ep *ep);
105 static void dwc2_handle_ep0(struct dwc2_udc *dev);
106 static int dwc2_ep0_write(struct dwc2_udc *dev);
107 static int write_fifo_ep0(struct dwc2_ep *ep, struct dwc2_request *req);
108 static void done(struct dwc2_ep *ep, struct dwc2_request *req, int status);
109 static void stop_activity(struct dwc2_udc *dev,
110 struct usb_gadget_driver *driver);
111 static int udc_enable(struct dwc2_udc *dev);
112 static void udc_set_address(struct dwc2_udc *dev, unsigned char address);
113 static void reconfig_usbd(struct dwc2_udc *dev);
114 static void set_max_pktsize(struct dwc2_udc *dev, enum usb_device_speed speed);
115 static void nuke(struct dwc2_ep *ep, int status);
116 static int dwc2_udc_set_halt(struct usb_ep *_ep, int value);
117 static void dwc2_udc_set_nak(struct dwc2_ep *ep);
119 void set_udc_gadget_private_data(void *p)
121 debug_cond(DEBUG_SETUP != 0,
122 "%s: the_controller: 0x%p, p: 0x%p\n", __func__,
124 the_controller->gadget.dev.device_data = p;
127 void *get_udc_gadget_private_data(struct usb_gadget *gadget)
129 return gadget->dev.device_data;
132 static struct usb_ep_ops dwc2_ep_ops = {
133 .enable = dwc2_ep_enable,
134 .disable = dwc2_ep_disable,
136 .alloc_request = dwc2_alloc_request,
137 .free_request = dwc2_free_request,
140 .dequeue = dwc2_dequeue,
142 .set_halt = dwc2_udc_set_halt,
143 .fifo_status = dwc2_fifo_status,
144 .fifo_flush = dwc2_fifo_flush,
147 #define create_proc_files() do {} while (0)
148 #define remove_proc_files() do {} while (0)
150 /***********************************************************/
152 struct dwc2_usbotg_reg *reg;
154 bool dfu_usb_get_reset(void)
156 return !!(readl(®->gintsts) & INT_RESET);
159 __weak void otg_phy_init(struct dwc2_udc *dev) {}
160 __weak void otg_phy_off(struct dwc2_udc *dev) {}
162 /***********************************************************/
164 #include "dwc2_udc_otg_xfer_dma.c"
167 * udc_disable - disable USB device controller
169 static void udc_disable(struct dwc2_udc *dev)
171 debug_cond(DEBUG_SETUP != 0, "%s: %p\n", __func__, dev);
173 udc_set_address(dev, 0);
175 dev->ep0state = WAIT_FOR_SETUP;
176 dev->gadget.speed = USB_SPEED_UNKNOWN;
177 dev->usb_address = 0;
183 * udc_reinit - initialize software state
185 static void udc_reinit(struct dwc2_udc *dev)
189 debug_cond(DEBUG_SETUP != 0, "%s: %p\n", __func__, dev);
191 /* device/ep0 records init */
192 INIT_LIST_HEAD(&dev->gadget.ep_list);
193 INIT_LIST_HEAD(&dev->gadget.ep0->ep_list);
194 dev->ep0state = WAIT_FOR_SETUP;
196 /* basic endpoint records init */
197 for (i = 0; i < DWC2_MAX_ENDPOINTS; i++) {
198 struct dwc2_ep *ep = &dev->ep[i];
201 list_add_tail(&ep->ep.ep_list, &dev->gadget.ep_list);
205 INIT_LIST_HEAD(&ep->queue);
209 /* the rest was statically initialized, and is read-only */
212 #define BYTES2MAXP(x) (x / 8)
213 #define MAXP2BYTES(x) (x * 8)
215 /* until it's enabled, this UDC should be completely invisible
218 static int udc_enable(struct dwc2_udc *dev)
220 debug_cond(DEBUG_SETUP != 0, "%s: %p\n", __func__, dev);
225 debug_cond(DEBUG_SETUP != 0,
226 "DWC2 USB 2.0 OTG Controller Core Initialized : 0x%x\n",
227 readl(®->gintmsk));
229 dev->gadget.speed = USB_SPEED_UNKNOWN;
234 #if !CONFIG_IS_ENABLED(DM_USB_GADGET)
236 Register entry point for the peripheral controller driver.
238 int usb_gadget_register_driver(struct usb_gadget_driver *driver)
240 struct dwc2_udc *dev = the_controller;
242 unsigned long flags = 0;
244 debug_cond(DEBUG_SETUP != 0, "%s: %s\n", __func__, "no name");
247 || (driver->speed != USB_SPEED_FULL
248 && driver->speed != USB_SPEED_HIGH)
249 || !driver->bind || !driver->disconnect || !driver->setup)
256 spin_lock_irqsave(&dev->lock, flags);
257 /* first hook up the driver ... */
258 dev->driver = driver;
259 spin_unlock_irqrestore(&dev->lock, flags);
261 if (retval) { /* TODO */
262 printf("target device_add failed, error %d\n", retval);
266 retval = driver->bind(&dev->gadget);
268 debug_cond(DEBUG_SETUP != 0,
269 "%s: bind to driver --> error %d\n",
270 dev->gadget.name, retval);
277 debug_cond(DEBUG_SETUP != 0,
278 "Registered gadget driver %s\n", dev->gadget.name);
285 * Unregister entry point for the peripheral controller driver.
287 int usb_gadget_unregister_driver(struct usb_gadget_driver *driver)
289 struct dwc2_udc *dev = the_controller;
290 unsigned long flags = 0;
294 if (!driver || driver != dev->driver)
297 spin_lock_irqsave(&dev->lock, flags);
299 stop_activity(dev, driver);
300 spin_unlock_irqrestore(&dev->lock, flags);
302 driver->unbind(&dev->gadget);
304 disable_irq(IRQ_OTG);
309 #else /* !CONFIG_IS_ENABLED(DM_USB_GADGET) */
311 static int dwc2_gadget_start(struct usb_gadget *g,
312 struct usb_gadget_driver *driver)
314 struct dwc2_udc *dev = the_controller;
316 debug_cond(DEBUG_SETUP != 0, "%s: %s\n", __func__, "no name");
319 (driver->speed != USB_SPEED_FULL &&
320 driver->speed != USB_SPEED_HIGH) ||
321 !driver->bind || !driver->disconnect || !driver->setup)
330 /* first hook up the driver ... */
331 dev->driver = driver;
333 debug_cond(DEBUG_SETUP != 0,
334 "Registered gadget driver %s\n", dev->gadget.name);
335 return udc_enable(dev);
338 static int dwc2_gadget_stop(struct usb_gadget *g)
340 struct dwc2_udc *dev = the_controller;
349 stop_activity(dev, dev->driver);
356 #endif /* !CONFIG_IS_ENABLED(DM_USB_GADGET) */
359 * done - retire a request; caller blocked irqs
361 static void done(struct dwc2_ep *ep, struct dwc2_request *req, int status)
363 unsigned int stopped = ep->stopped;
365 debug("%s: %s %p, req = %p, stopped = %d\n",
366 __func__, ep->ep.name, ep, &req->req, stopped);
368 list_del_init(&req->queue);
370 if (likely(req->req.status == -EINPROGRESS))
371 req->req.status = status;
373 status = req->req.status;
375 if (status && status != -ESHUTDOWN) {
376 debug("complete %s req %p stat %d len %u/%u\n",
377 ep->ep.name, &req->req, status,
378 req->req.actual, req->req.length);
381 /* don't modify queue heads during completion callback */
385 printf("calling complete callback\n");
387 int i, len = req->req.length;
389 printf("pkt[%d] = ", req->req.length);
392 for (i = 0; i < len; i++) {
393 printf("%02x", ((u8 *)req->req.buf)[i]);
400 spin_unlock(&ep->dev->lock);
401 req->req.complete(&ep->ep, &req->req);
402 spin_lock(&ep->dev->lock);
404 debug("callback completed\n");
406 ep->stopped = stopped;
410 * nuke - dequeue ALL requests
412 static void nuke(struct dwc2_ep *ep, int status)
414 struct dwc2_request *req;
416 debug("%s: %s %p\n", __func__, ep->ep.name, ep);
418 /* called with irqs blocked */
419 while (!list_empty(&ep->queue)) {
420 req = list_entry(ep->queue.next, struct dwc2_request, queue);
421 done(ep, req, status);
425 static void stop_activity(struct dwc2_udc *dev,
426 struct usb_gadget_driver *driver)
430 /* don't disconnect drivers more than once */
431 if (dev->gadget.speed == USB_SPEED_UNKNOWN)
433 dev->gadget.speed = USB_SPEED_UNKNOWN;
435 /* prevent new request submissions, kill any outstanding requests */
436 for (i = 0; i < DWC2_MAX_ENDPOINTS; i++) {
437 struct dwc2_ep *ep = &dev->ep[i];
439 nuke(ep, -ESHUTDOWN);
442 /* report disconnect; the driver is already quiesced */
444 spin_unlock(&dev->lock);
445 driver->disconnect(&dev->gadget);
446 spin_lock(&dev->lock);
449 /* re-init driver-visible data structures */
453 static void reconfig_usbd(struct dwc2_udc *dev)
455 /* 2. Soft-reset OTG Core and then unreset again. */
457 unsigned int uTemp = writel(CORE_SOFT_RESET, ®->grstctl);
458 uint32_t dflt_gusbcfg;
459 uint32_t rx_fifo_sz, tx_fifo_sz, np_tx_fifo_sz;
463 debug("Reseting OTG controller\n");
466 0<<15 /* PHY Low Power Clock sel*/
467 |1<<14 /* Non-Periodic TxFIFO Rewind Enable*/
468 |0x5<<10 /* Turnaround time*/
469 |0<<9 | 0<<8 /* [0:HNP disable,1:HNP enable][ 0:SRP disable*/
470 /* 1:SRP enable] H1= 1,1*/
471 |0<<7 /* Ulpi DDR sel*/
472 |0<<6 /* 0: high speed utmi+, 1: full speed serial*/
473 |0<<4 /* 0: utmi+, 1:ulpi*/
474 #ifdef CONFIG_USB_GADGET_DWC2_OTG_PHY_BUS_WIDTH_8
475 |0<<3 /* phy i/f 0:8bit, 1:16bit*/
477 |1<<3 /* phy i/f 0:8bit, 1:16bit*/
479 |0x7<<0; /* HS/FS Timeout**/
481 if (dev->pdata->usb_gusbcfg)
482 dflt_gusbcfg = dev->pdata->usb_gusbcfg;
484 writel(dflt_gusbcfg, ®->gusbcfg);
486 /* 3. Put the OTG device core in the disconnected state.*/
487 uTemp = readl(®->dctl);
488 uTemp |= SOFT_DISCONNECT;
489 writel(uTemp, ®->dctl);
493 /* 4. Make the OTG device core exit from the disconnected state.*/
494 uTemp = readl(®->dctl);
495 uTemp = uTemp & ~SOFT_DISCONNECT;
496 writel(uTemp, ®->dctl);
498 /* 5. Configure OTG Core to initial settings of device mode.*/
499 /* [][1: full speed(30Mhz) 0:high speed]*/
500 writel(EP_MISS_CNT(1) | DEV_SPEED_HIGH_SPEED_20, ®->dcfg);
504 /* 6. Unmask the core interrupts*/
505 writel(GINTMSK_INIT, ®->gintmsk);
507 /* 7. Set NAK bit of EP0, EP1, EP2*/
508 writel(DEPCTL_EPDIS|DEPCTL_SNAK, ®->out_endp[EP0_CON].doepctl);
509 writel(DEPCTL_EPDIS|DEPCTL_SNAK, ®->in_endp[EP0_CON].diepctl);
511 for (i = 1; i < DWC2_MAX_ENDPOINTS; i++) {
512 writel(DEPCTL_EPDIS|DEPCTL_SNAK, ®->out_endp[i].doepctl);
513 writel(DEPCTL_EPDIS|DEPCTL_SNAK, ®->in_endp[i].diepctl);
516 /* 8. Unmask EPO interrupts*/
517 writel(((1 << EP0_CON) << DAINT_OUT_BIT)
518 | (1 << EP0_CON), ®->daintmsk);
520 /* 9. Unmask device OUT EP common interrupts*/
521 writel(DOEPMSK_INIT, ®->doepmsk);
523 /* 10. Unmask device IN EP common interrupts*/
524 writel(DIEPMSK_INIT, ®->diepmsk);
526 rx_fifo_sz = RX_FIFO_SIZE;
527 np_tx_fifo_sz = NPTX_FIFO_SIZE;
528 tx_fifo_sz = PTX_FIFO_SIZE;
530 if (dev->pdata->rx_fifo_sz)
531 rx_fifo_sz = dev->pdata->rx_fifo_sz;
532 if (dev->pdata->np_tx_fifo_sz)
533 np_tx_fifo_sz = dev->pdata->np_tx_fifo_sz;
534 if (dev->pdata->tx_fifo_sz)
535 tx_fifo_sz = dev->pdata->tx_fifo_sz;
537 /* 11. Set Rx FIFO Size (in 32-bit words) */
538 writel(rx_fifo_sz, ®->grxfsiz);
540 /* 12. Set Non Periodic Tx FIFO Size */
541 writel((np_tx_fifo_sz << 16) | rx_fifo_sz,
544 /* retrieve the number of IN Endpoints (excluding ep0) */
545 max_hw_ep = (readl(®->ghwcfg4) & GHWCFG4_NUM_IN_EPS_MASK) >>
546 GHWCFG4_NUM_IN_EPS_SHIFT;
547 pdata_hw_ep = dev->pdata->tx_fifo_sz_nb;
549 /* tx_fifo_sz_nb should equal to number of IN Endpoint */
550 if (pdata_hw_ep && max_hw_ep != pdata_hw_ep)
551 pr_warn("Got %d hw endpoint but %d tx-fifo-size in array !!\n",
552 max_hw_ep, pdata_hw_ep);
554 for (i = 0; i < max_hw_ep; i++) {
556 tx_fifo_sz = dev->pdata->tx_fifo_sz_array[i];
558 writel((rx_fifo_sz + np_tx_fifo_sz + (tx_fifo_sz * i)) |
559 tx_fifo_sz << 16, ®->dieptxf[i]);
561 /* Flush the RX FIFO */
562 writel(RX_FIFO_FLUSH, ®->grstctl);
563 while (readl(®->grstctl) & RX_FIFO_FLUSH)
564 debug("%s: waiting for DWC2_UDC_OTG_GRSTCTL\n", __func__);
566 /* Flush all the Tx FIFO's */
567 writel(TX_FIFO_FLUSH_ALL, ®->grstctl);
568 writel(TX_FIFO_FLUSH_ALL | TX_FIFO_FLUSH, ®->grstctl);
569 while (readl(®->grstctl) & TX_FIFO_FLUSH)
570 debug("%s: waiting for DWC2_UDC_OTG_GRSTCTL\n", __func__);
572 /* 13. Clear NAK bit of EP0, EP1, EP2*/
574 /* EP0: Control OUT */
575 writel(DEPCTL_EPDIS | DEPCTL_CNAK,
576 ®->out_endp[EP0_CON].doepctl);
578 /* 14. Initialize OTG Link Core.*/
579 writel(GAHBCFG_INIT, ®->gahbcfg);
582 static void set_max_pktsize(struct dwc2_udc *dev, enum usb_device_speed speed)
584 unsigned int ep_ctrl;
587 if (speed == USB_SPEED_HIGH) {
590 ep_fifo_size2 = 1024;
591 dev->gadget.speed = USB_SPEED_HIGH;
596 dev->gadget.speed = USB_SPEED_FULL;
599 dev->ep[0].ep.maxpacket = ep0_fifo_size;
600 for (i = 1; i < DWC2_MAX_ENDPOINTS; i++)
601 dev->ep[i].ep.maxpacket = ep_fifo_size;
603 /* EP0 - Control IN (64 bytes)*/
604 ep_ctrl = readl(®->in_endp[EP0_CON].diepctl);
605 writel(ep_ctrl|(0<<0), ®->in_endp[EP0_CON].diepctl);
607 /* EP0 - Control OUT (64 bytes)*/
608 ep_ctrl = readl(®->out_endp[EP0_CON].doepctl);
609 writel(ep_ctrl|(0<<0), ®->out_endp[EP0_CON].doepctl);
612 static int dwc2_ep_enable(struct usb_ep *_ep,
613 const struct usb_endpoint_descriptor *desc)
616 struct dwc2_udc *dev;
617 unsigned long flags = 0;
619 debug("%s: %p\n", __func__, _ep);
621 ep = container_of(_ep, struct dwc2_ep, ep);
622 if (!_ep || !desc || ep->desc || _ep->name == ep0name
623 || desc->bDescriptorType != USB_DT_ENDPOINT
624 || ep->bEndpointAddress != desc->bEndpointAddress
625 || ep_maxpacket(ep) <
626 le16_to_cpu(get_unaligned(&desc->wMaxPacketSize))) {
628 debug("%s: bad ep or descriptor\n", __func__);
632 /* xfer types must match, except that interrupt ~= bulk */
633 if (ep->bmAttributes != desc->bmAttributes
634 && ep->bmAttributes != USB_ENDPOINT_XFER_BULK
635 && desc->bmAttributes != USB_ENDPOINT_XFER_INT) {
637 debug("%s: %s type mismatch\n", __func__, _ep->name);
641 /* hardware _could_ do smaller, but driver doesn't */
642 if ((desc->bmAttributes == USB_ENDPOINT_XFER_BULK &&
643 le16_to_cpu(get_unaligned(&desc->wMaxPacketSize)) >
644 ep_maxpacket(ep)) || !get_unaligned(&desc->wMaxPacketSize)) {
646 debug("%s: bad %s maxpacket\n", __func__, _ep->name);
651 if (!dev->driver || dev->gadget.speed == USB_SPEED_UNKNOWN) {
653 debug("%s: bogus device state\n", __func__);
660 ep->ep.maxpacket = le16_to_cpu(get_unaligned(&desc->wMaxPacketSize));
662 /* Reset halt state */
663 dwc2_udc_set_nak(ep);
664 dwc2_udc_set_halt(_ep, 0);
666 spin_lock_irqsave(&ep->dev->lock, flags);
667 dwc2_udc_ep_activate(ep);
668 spin_unlock_irqrestore(&ep->dev->lock, flags);
670 debug("%s: enabled %s, stopped = %d, maxpacket = %d\n",
671 __func__, _ep->name, ep->stopped, ep->ep.maxpacket);
678 static int dwc2_ep_disable(struct usb_ep *_ep)
681 unsigned long flags = 0;
683 debug("%s: %p\n", __func__, _ep);
685 ep = container_of(_ep, struct dwc2_ep, ep);
686 if (!_ep || !ep->desc) {
687 debug("%s: %s not enabled\n", __func__,
688 _ep ? ep->ep.name : NULL);
692 spin_lock_irqsave(&ep->dev->lock, flags);
694 /* Nuke all pending requests */
695 nuke(ep, -ESHUTDOWN);
700 spin_unlock_irqrestore(&ep->dev->lock, flags);
702 debug("%s: disabled %s\n", __func__, _ep->name);
706 static struct usb_request *dwc2_alloc_request(struct usb_ep *ep,
709 struct dwc2_request *req;
711 debug("%s: %s %p\n", __func__, ep->name, ep);
713 req = memalign(CONFIG_SYS_CACHELINE_SIZE, sizeof(*req));
717 memset(req, 0, sizeof *req);
718 INIT_LIST_HEAD(&req->queue);
723 static void dwc2_free_request(struct usb_ep *ep, struct usb_request *_req)
725 struct dwc2_request *req;
727 debug("%s: %p\n", __func__, ep);
729 req = container_of(_req, struct dwc2_request, req);
730 WARN_ON(!list_empty(&req->queue));
734 /* dequeue JUST ONE request */
735 static int dwc2_dequeue(struct usb_ep *_ep, struct usb_request *_req)
738 struct dwc2_request *req;
739 unsigned long flags = 0;
741 debug("%s: %p\n", __func__, _ep);
743 ep = container_of(_ep, struct dwc2_ep, ep);
744 if (!_ep || ep->ep.name == ep0name)
747 spin_lock_irqsave(&ep->dev->lock, flags);
749 /* make sure it's actually queued on this endpoint */
750 list_for_each_entry(req, &ep->queue, queue) {
751 if (&req->req == _req)
754 if (&req->req != _req) {
755 spin_unlock_irqrestore(&ep->dev->lock, flags);
759 done(ep, req, -ECONNRESET);
761 spin_unlock_irqrestore(&ep->dev->lock, flags);
766 * Return bytes in EP FIFO
768 static int dwc2_fifo_status(struct usb_ep *_ep)
773 ep = container_of(_ep, struct dwc2_ep, ep);
775 debug("%s: bad ep\n", __func__);
779 debug("%s: %d\n", __func__, ep_index(ep));
781 /* LPD can't report unclaimed bytes from IN fifos */
791 static void dwc2_fifo_flush(struct usb_ep *_ep)
795 ep = container_of(_ep, struct dwc2_ep, ep);
796 if (unlikely(!_ep || (!ep->desc && ep->ep.name != ep0name))) {
797 debug("%s: bad ep\n", __func__);
801 debug("%s: %d\n", __func__, ep_index(ep));
804 static const struct usb_gadget_ops dwc2_udc_ops = {
805 /* current versions must always be self-powered */
806 #if CONFIG_IS_ENABLED(DM_USB_GADGET)
807 .udc_start = dwc2_gadget_start,
808 .udc_stop = dwc2_gadget_stop,
812 static struct dwc2_udc memory = {
815 .ops = &dwc2_udc_ops,
816 .ep0 = &memory.ep[0].ep,
820 /* control endpoint */
825 .maxpacket = EP0_FIFO_SIZE,
829 .bEndpointAddress = 0,
832 .ep_type = ep_control,
835 /* first group of endpoints */
838 .name = "ep1in-bulk",
840 .maxpacket = EP_FIFO_SIZE,
844 .bEndpointAddress = USB_DIR_IN | 1,
845 .bmAttributes = USB_ENDPOINT_XFER_BULK,
847 .ep_type = ep_bulk_out,
853 .name = "ep2out-bulk",
855 .maxpacket = EP_FIFO_SIZE,
859 .bEndpointAddress = USB_DIR_OUT | 2,
860 .bmAttributes = USB_ENDPOINT_XFER_BULK,
862 .ep_type = ep_bulk_in,
870 .maxpacket = EP_FIFO_SIZE,
874 .bEndpointAddress = USB_DIR_IN | 3,
875 .bmAttributes = USB_ENDPOINT_XFER_INT,
877 .ep_type = ep_interrupt,
883 * probe - binds to the platform device
886 int dwc2_udc_probe(struct dwc2_plat_otg_data *pdata)
888 struct dwc2_udc *dev = &memory;
891 debug("%s: %p\n", __func__, pdata);
895 reg = (struct dwc2_usbotg_reg *)pdata->regs_otg;
897 dev->gadget.is_dualspeed = 1; /* Hack only*/
898 dev->gadget.is_otg = 0;
899 dev->gadget.is_a_peripheral = 0;
900 dev->gadget.b_hnp_enable = 0;
901 dev->gadget.a_hnp_support = 0;
902 dev->gadget.a_alt_hnp_support = 0;
904 the_controller = dev;
906 usb_ctrl = memalign(CONFIG_SYS_CACHELINE_SIZE,
907 ROUND(sizeof(struct usb_ctrlrequest),
908 CONFIG_SYS_CACHELINE_SIZE));
910 pr_err("No memory available for UDC!\n");
914 usb_ctrl_dma_addr = (dma_addr_t) usb_ctrl;
921 int dwc2_udc_handle_interrupt(void)
923 u32 intr_status = readl(®->gintsts);
924 u32 gintmsk = readl(®->gintmsk);
926 if (intr_status & gintmsk)
927 return dwc2_udc_irq(1, (void *)the_controller);
932 #if !CONFIG_IS_ENABLED(DM_USB_GADGET)
934 int usb_gadget_handle_interrupts(int index)
936 return dwc2_udc_handle_interrupt();
939 #else /* CONFIG_IS_ENABLED(DM_USB_GADGET) */
941 struct dwc2_priv_data {
942 struct clk_bulk clks;
943 struct reset_ctl_bulk resets;
946 struct udevice *usb33d_supply;
949 int dm_usb_gadget_handle_interrupts(struct udevice *dev)
951 return dwc2_udc_handle_interrupt();
954 int dwc2_phy_setup(struct udevice *dev, struct phy **array, int *num_phys)
957 struct phy *usb_phys;
959 /* Return if no phy declared */
960 if (!dev_read_prop(dev, "phys", NULL))
963 count = dev_count_phandle_with_args(dev, "phys", "#phy-cells");
967 usb_phys = devm_kcalloc(dev, count, sizeof(struct phy),
972 for (i = 0; i < count; i++) {
973 ret = generic_phy_get_by_index(dev, i, &usb_phys[i]);
974 if (ret && ret != -ENOENT) {
975 dev_err(dev, "Failed to get USB PHY%d for %s\n",
981 for (i = 0; i < count; i++) {
982 ret = generic_phy_init(&usb_phys[i]);
984 dev_err(dev, "Can't init USB PHY%d for %s\n",
990 for (i = 0; i < count; i++) {
991 ret = generic_phy_power_on(&usb_phys[i]);
993 dev_err(dev, "Can't power USB PHY%d for %s\n",
995 goto phys_poweron_err;
1005 for (i = count - 1; i >= 0; i--)
1006 generic_phy_power_off(&usb_phys[i]);
1008 for (i = 0; i < count; i++)
1009 generic_phy_exit(&usb_phys[i]);
1015 generic_phy_exit(&usb_phys[i]);
1020 void dwc2_phy_shutdown(struct udevice *dev, struct phy *usb_phys, int num_phys)
1024 for (i = 0; i < num_phys; i++) {
1025 if (!generic_phy_valid(&usb_phys[i]))
1028 ret = generic_phy_power_off(&usb_phys[i]);
1029 ret |= generic_phy_exit(&usb_phys[i]);
1031 dev_err(dev, "Can't shutdown USB PHY%d for %s\n",
1037 static int dwc2_udc_otg_ofdata_to_platdata(struct udevice *dev)
1039 struct dwc2_plat_otg_data *platdata = dev_get_platdata(dev);
1040 int node = dev_of_offset(dev);
1042 void (*set_params)(struct dwc2_plat_otg_data *data);
1045 if (usb_get_dr_mode(node) != USB_DR_MODE_PERIPHERAL &&
1046 usb_get_dr_mode(node) != USB_DR_MODE_OTG) {
1047 dev_dbg(dev, "Invalid mode\n");
1051 platdata->regs_otg = dev_read_addr(dev);
1053 platdata->rx_fifo_sz = dev_read_u32_default(dev, "g-rx-fifo-size", 0);
1054 platdata->np_tx_fifo_sz = dev_read_u32_default(dev,
1055 "g-np-tx-fifo-size", 0);
1057 platdata->tx_fifo_sz_nb =
1058 dev_read_size(dev, "g-tx-fifo-size") / sizeof(u32);
1059 if (platdata->tx_fifo_sz_nb > DWC2_MAX_HW_ENDPOINTS)
1060 platdata->tx_fifo_sz_nb = DWC2_MAX_HW_ENDPOINTS;
1061 if (platdata->tx_fifo_sz_nb) {
1062 ret = dev_read_u32_array(dev, "g-tx-fifo-size",
1063 platdata->tx_fifo_sz_array,
1064 platdata->tx_fifo_sz_nb);
1069 platdata->force_b_session_valid =
1070 dev_read_bool(dev, "u-boot,force-b-session-valid");
1072 /* force platdata according compatible */
1073 drvdata = dev_get_driver_data(dev);
1075 set_params = (void *)drvdata;
1076 set_params(platdata);
1082 static void dwc2_set_stm32mp1_hsotg_params(struct dwc2_plat_otg_data *p)
1084 p->activate_stm_id_vb_detection = true;
1086 0 << 15 /* PHY Low Power Clock sel*/
1087 | 0x9 << 10 /* USB Turnaround time (0x9 for HS phy) */
1088 | 0 << 9 /* [0:HNP disable,1:HNP enable]*/
1089 | 0 << 8 /* [0:SRP disable 1:SRP enable]*/
1090 | 0 << 6 /* 0: high speed utmi+, 1: full speed serial*/
1091 | 0x7 << 0; /* FS timeout calibration**/
1093 if (p->force_b_session_valid)
1094 p->usb_gusbcfg |= 1 << 30; /* FDMOD: Force device mode */
1097 static int dwc2_udc_otg_reset_init(struct udevice *dev,
1098 struct reset_ctl_bulk *resets)
1102 ret = reset_get_bulk(dev, resets);
1103 if (ret == -ENOTSUPP)
1109 ret = reset_assert_bulk(resets);
1113 ret = reset_deassert_bulk(resets);
1116 reset_release_bulk(resets);
1123 static int dwc2_udc_otg_clk_init(struct udevice *dev,
1124 struct clk_bulk *clks)
1128 ret = clk_get_bulk(dev, clks);
1135 ret = clk_enable_bulk(clks);
1137 clk_release_bulk(clks);
1144 static int dwc2_udc_otg_probe(struct udevice *dev)
1146 struct dwc2_plat_otg_data *platdata = dev_get_platdata(dev);
1147 struct dwc2_priv_data *priv = dev_get_priv(dev);
1148 struct dwc2_usbotg_reg *usbotg_reg =
1149 (struct dwc2_usbotg_reg *)platdata->regs_otg;
1152 ret = dwc2_udc_otg_clk_init(dev, &priv->clks);
1156 ret = dwc2_udc_otg_reset_init(dev, &priv->resets);
1160 ret = dwc2_phy_setup(dev, &priv->phys, &priv->num_phys);
1164 if (CONFIG_IS_ENABLED(DM_REGULATOR) &&
1165 platdata->activate_stm_id_vb_detection &&
1166 !platdata->force_b_session_valid) {
1167 ret = device_get_supply_regulator(dev, "usb33d-supply",
1168 &priv->usb33d_supply);
1170 dev_err(dev, "can't get voltage level detector supply\n");
1173 ret = regulator_set_enable(priv->usb33d_supply, true);
1175 dev_err(dev, "can't enable voltage level detector supply\n");
1178 /* Enable vbus sensing */
1179 setbits_le32(&usbotg_reg->ggpio,
1180 GGPIO_STM32_OTG_GCCFG_VBDEN |
1181 GGPIO_STM32_OTG_GCCFG_IDEN);
1184 if (platdata->force_b_session_valid)
1185 /* Override B session bits : value and enable */
1186 setbits_le32(&usbotg_reg->gotgctl,
1187 A_VALOEN | A_VALOVAL | B_VALOEN | B_VALOVAL);
1189 ret = dwc2_udc_probe(platdata);
1193 the_controller->driver = 0;
1195 ret = usb_add_gadget_udc((struct device *)dev, &the_controller->gadget);
1200 static int dwc2_udc_otg_remove(struct udevice *dev)
1202 struct dwc2_priv_data *priv = dev_get_priv(dev);
1204 usb_del_gadget_udc(&the_controller->gadget);
1206 reset_release_bulk(&priv->resets);
1208 clk_release_bulk(&priv->clks);
1210 dwc2_phy_shutdown(dev, priv->phys, priv->num_phys);
1212 return dm_scan_fdt_dev(dev);
1215 static const struct udevice_id dwc2_udc_otg_ids[] = {
1216 { .compatible = "snps,dwc2" },
1217 { .compatible = "brcm,bcm2835-usb" },
1218 { .compatible = "st,stm32mp1-hsotg",
1219 .data = (ulong)dwc2_set_stm32mp1_hsotg_params },
1223 U_BOOT_DRIVER(dwc2_udc_otg) = {
1224 .name = "dwc2-udc-otg",
1225 .id = UCLASS_USB_GADGET_GENERIC,
1226 .of_match = dwc2_udc_otg_ids,
1227 .ofdata_to_platdata = dwc2_udc_otg_ofdata_to_platdata,
1228 .probe = dwc2_udc_otg_probe,
1229 .remove = dwc2_udc_otg_remove,
1230 .platdata_auto_alloc_size = sizeof(struct dwc2_plat_otg_data),
1231 .priv_auto_alloc_size = sizeof(struct dwc2_priv_data),
1234 int dwc2_udc_B_session_valid(struct udevice *dev)
1236 struct dwc2_plat_otg_data *platdata = dev_get_platdata(dev);
1237 struct dwc2_usbotg_reg *usbotg_reg =
1238 (struct dwc2_usbotg_reg *)platdata->regs_otg;
1240 return readl(&usbotg_reg->gotgctl) & B_SESSION_VALID;
1242 #endif /* CONFIG_IS_ENABLED(DM_USB_GADGET) */