1 // SPDX-License-Identifier: GPL-2.0+
3 * Copyright 2011, Marvell Semiconductor Inc.
4 * Lei Wen <leiwen@marvell.com>
6 * Back ported to the 8xx platform (from the 8260 platform) by
7 * Murray.Jensen@cmst.csiro.au, 27-Jan-01.
15 #include <asm/byteorder.h>
16 #include <linux/errno.h>
18 #include <asm/unaligned.h>
19 #include <linux/types.h>
20 #include <linux/usb/ch9.h>
21 #include <linux/usb/gadget.h>
22 #include <usb/ci_udc.h>
23 #include "../host/ehci.h"
27 * Check if the system has too long cachelines. If the cachelines are
28 * longer then 128b, the driver will not be able flush/invalidate data
29 * cache over separate QH entries. We use 128b because one QH entry is
30 * 64b long and there are always two QH list entries for each endpoint.
32 #if ARCH_DMA_MINALIGN > 128
33 #error This driver can not work on systems with caches longer than 128b
37 * Every QTD must be individually aligned, since we can program any
38 * QTD's address into HW. Cache flushing requires ARCH_DMA_MINALIGN,
39 * and the USB HW requires 32-byte alignment. Align to both:
41 #define ILIST_ALIGN roundup(ARCH_DMA_MINALIGN, 32)
42 /* Each QTD is this size */
43 #define ILIST_ENT_RAW_SZ sizeof(struct ept_queue_item)
45 * Align the size of the QTD too, so we can add this value to each
46 * QTD's address to get another aligned address.
48 #define ILIST_ENT_SZ roundup(ILIST_ENT_RAW_SZ, ILIST_ALIGN)
49 /* For each endpoint, we need 2 QTDs, one for each of IN and OUT */
50 #define ILIST_SZ (NUM_ENDPOINTS * 2 * ILIST_ENT_SZ)
52 #define EP_MAX_LENGTH_TRANSFER 0x4000
55 #define DBG(x...) do {} while (0)
57 #define DBG(x...) printf(x)
58 static const char *reqname(unsigned r)
61 case USB_REQ_GET_STATUS: return "GET_STATUS";
62 case USB_REQ_CLEAR_FEATURE: return "CLEAR_FEATURE";
63 case USB_REQ_SET_FEATURE: return "SET_FEATURE";
64 case USB_REQ_SET_ADDRESS: return "SET_ADDRESS";
65 case USB_REQ_GET_DESCRIPTOR: return "GET_DESCRIPTOR";
66 case USB_REQ_SET_DESCRIPTOR: return "SET_DESCRIPTOR";
67 case USB_REQ_GET_CONFIGURATION: return "GET_CONFIGURATION";
68 case USB_REQ_SET_CONFIGURATION: return "SET_CONFIGURATION";
69 case USB_REQ_GET_INTERFACE: return "GET_INTERFACE";
70 case USB_REQ_SET_INTERFACE: return "SET_INTERFACE";
71 default: return "*UNKNOWN*";
76 static struct usb_endpoint_descriptor ep0_desc = {
77 .bLength = sizeof(struct usb_endpoint_descriptor),
78 .bDescriptorType = USB_DT_ENDPOINT,
79 .bEndpointAddress = USB_DIR_IN,
80 .bmAttributes = USB_ENDPOINT_XFER_CONTROL,
83 static int ci_pullup(struct usb_gadget *gadget, int is_on);
84 static int ci_ep_enable(struct usb_ep *ep,
85 const struct usb_endpoint_descriptor *desc);
86 static int ci_ep_disable(struct usb_ep *ep);
87 static int ci_ep_queue(struct usb_ep *ep,
88 struct usb_request *req, gfp_t gfp_flags);
89 static int ci_ep_dequeue(struct usb_ep *ep, struct usb_request *req);
90 static struct usb_request *
91 ci_ep_alloc_request(struct usb_ep *ep, unsigned int gfp_flags);
92 static void ci_ep_free_request(struct usb_ep *ep, struct usb_request *_req);
94 static struct usb_gadget_ops ci_udc_ops = {
98 static struct usb_ep_ops ci_ep_ops = {
99 .enable = ci_ep_enable,
100 .disable = ci_ep_disable,
101 .queue = ci_ep_queue,
102 .dequeue = ci_ep_dequeue,
103 .alloc_request = ci_ep_alloc_request,
104 .free_request = ci_ep_free_request,
107 __weak void ci_init_after_reset(struct ehci_ctrl *ctrl)
111 /* Init values for USB endpoints. */
112 static const struct usb_ep ci_ep_init[5] = {
120 .name = "ep1in-bulk",
125 .name = "ep2out-bulk",
140 static struct ci_drv controller = {
149 * ci_get_qh() - return queue head for endpoint
150 * @ep_num: Endpoint number
151 * @dir_in: Direction of the endpoint (IN = 1, OUT = 0)
153 * This function returns the QH associated with particular endpoint
154 * and it's direction.
156 static struct ept_queue_head *ci_get_qh(int ep_num, int dir_in)
158 return &controller.epts[(ep_num * 2) + dir_in];
162 * ci_get_qtd() - return queue item for endpoint
163 * @ep_num: Endpoint number
164 * @dir_in: Direction of the endpoint (IN = 1, OUT = 0)
166 * This function returns the QH associated with particular endpoint
167 * and it's direction.
169 static struct ept_queue_item *ci_get_qtd(int ep_num, int dir_in)
171 int index = (ep_num * 2) + dir_in;
172 uint8_t *imem = controller.items_mem + (index * ILIST_ENT_SZ);
173 return (struct ept_queue_item *)imem;
177 * ci_flush_qh - flush cache over queue head
178 * @ep_num: Endpoint number
180 * This function flushes cache over QH for particular endpoint.
182 static void ci_flush_qh(int ep_num)
184 struct ept_queue_head *head = ci_get_qh(ep_num, 0);
185 const unsigned long start = (unsigned long)head;
186 const unsigned long end = start + 2 * sizeof(*head);
188 flush_dcache_range(start, end);
192 * ci_invalidate_qh - invalidate cache over queue head
193 * @ep_num: Endpoint number
195 * This function invalidates cache over QH for particular endpoint.
197 static void ci_invalidate_qh(int ep_num)
199 struct ept_queue_head *head = ci_get_qh(ep_num, 0);
200 unsigned long start = (unsigned long)head;
201 unsigned long end = start + 2 * sizeof(*head);
203 invalidate_dcache_range(start, end);
207 * ci_flush_qtd - flush cache over queue item
208 * @ep_num: Endpoint number
210 * This function flushes cache over qTD pair for particular endpoint.
212 static void ci_flush_qtd(int ep_num)
214 struct ept_queue_item *item = ci_get_qtd(ep_num, 0);
215 const unsigned long start = (unsigned long)item;
216 const unsigned long end = start + 2 * ILIST_ENT_SZ;
218 flush_dcache_range(start, end);
222 * ci_flush_td - flush cache over queue item
225 * This function flushes cache for particular transfer descriptor.
227 static void ci_flush_td(struct ept_queue_item *td)
229 const unsigned long start = (unsigned long)td;
230 const unsigned long end = (unsigned long)td + ILIST_ENT_SZ;
231 flush_dcache_range(start, end);
235 * ci_invalidate_qtd - invalidate cache over queue item
236 * @ep_num: Endpoint number
238 * This function invalidates cache over qTD pair for particular endpoint.
240 static void ci_invalidate_qtd(int ep_num)
242 struct ept_queue_item *item = ci_get_qtd(ep_num, 0);
243 const unsigned long start = (unsigned long)item;
244 const unsigned long end = start + 2 * ILIST_ENT_SZ;
246 invalidate_dcache_range(start, end);
250 * ci_invalidate_td - invalidate cache over queue item
253 * This function invalidates cache for particular transfer descriptor.
255 static void ci_invalidate_td(struct ept_queue_item *td)
257 const unsigned long start = (unsigned long)td;
258 const unsigned long end = start + ILIST_ENT_SZ;
259 invalidate_dcache_range(start, end);
262 static struct usb_request *
263 ci_ep_alloc_request(struct usb_ep *ep, unsigned int gfp_flags)
265 struct ci_ep *ci_ep = container_of(ep, struct ci_ep, ep);
267 struct ci_req *ci_req;
270 num = ci_ep->desc->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK;
272 if (num == 0 && controller.ep0_req)
273 return &controller.ep0_req->req;
275 ci_req = calloc(1, sizeof(*ci_req));
279 INIT_LIST_HEAD(&ci_req->queue);
282 controller.ep0_req = ci_req;
287 static void ci_ep_free_request(struct usb_ep *ep, struct usb_request *req)
289 struct ci_ep *ci_ep = container_of(ep, struct ci_ep, ep);
290 struct ci_req *ci_req = container_of(req, struct ci_req, req);
294 num = ci_ep->desc->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK;
297 if (!controller.ep0_req)
299 controller.ep0_req = 0;
307 static void ep_enable(int num, int in, int maxpacket)
309 struct ci_udc *udc = (struct ci_udc *)controller.ctrl->hcor;
312 n = readl(&udc->epctrl[num]);
314 n |= (CTRL_TXE | CTRL_TXR | CTRL_TXT_BULK);
316 n |= (CTRL_RXE | CTRL_RXR | CTRL_RXT_BULK);
319 struct ept_queue_head *head = ci_get_qh(num, in);
321 head->config = CONFIG_MAX_PKT(maxpacket) | CONFIG_ZLT;
324 writel(n, &udc->epctrl[num]);
327 static int ci_ep_enable(struct usb_ep *ep,
328 const struct usb_endpoint_descriptor *desc)
330 struct ci_ep *ci_ep = container_of(ep, struct ci_ep, ep);
332 num = desc->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK;
333 in = (desc->bEndpointAddress & USB_DIR_IN) != 0;
337 int max = get_unaligned_le16(&desc->wMaxPacketSize);
339 if ((max > 64) && (controller.gadget.speed == USB_SPEED_FULL))
341 if (ep->maxpacket != max) {
342 DBG("%s: from %d to %d\n", __func__,
347 ep_enable(num, in, ep->maxpacket);
348 DBG("%s: num=%d maxpacket=%d\n", __func__, num, ep->maxpacket);
352 static int ci_ep_disable(struct usb_ep *ep)
354 struct ci_ep *ci_ep = container_of(ep, struct ci_ep, ep);
360 static int ci_bounce(struct ci_req *ci_req, int in)
362 struct usb_request *req = &ci_req->req;
363 unsigned long addr = (unsigned long)req->buf;
364 unsigned long hwaddr;
365 uint32_t aligned_used_len;
367 /* Input buffer address is not aligned. */
368 if (addr & (ARCH_DMA_MINALIGN - 1))
371 /* Input buffer length is not aligned. */
372 if (req->length & (ARCH_DMA_MINALIGN - 1))
375 /* The buffer is well aligned, only flush cache. */
376 ci_req->hw_len = req->length;
377 ci_req->hw_buf = req->buf;
381 if (ci_req->b_buf && req->length > ci_req->b_len) {
385 if (!ci_req->b_buf) {
386 ci_req->b_len = roundup(req->length, ARCH_DMA_MINALIGN);
387 ci_req->b_buf = memalign(ARCH_DMA_MINALIGN, ci_req->b_len);
391 ci_req->hw_len = ci_req->b_len;
392 ci_req->hw_buf = ci_req->b_buf;
395 memcpy(ci_req->hw_buf, req->buf, req->length);
398 hwaddr = (unsigned long)ci_req->hw_buf;
399 aligned_used_len = roundup(req->length, ARCH_DMA_MINALIGN);
400 flush_dcache_range(hwaddr, hwaddr + aligned_used_len);
405 static void ci_debounce(struct ci_req *ci_req, int in)
407 struct usb_request *req = &ci_req->req;
408 unsigned long addr = (unsigned long)req->buf;
409 unsigned long hwaddr = (unsigned long)ci_req->hw_buf;
410 uint32_t aligned_used_len;
415 aligned_used_len = roundup(req->actual, ARCH_DMA_MINALIGN);
416 invalidate_dcache_range(hwaddr, hwaddr + aligned_used_len);
419 return; /* not a bounce */
421 memcpy(req->buf, ci_req->hw_buf, req->actual);
424 static void ci_ep_submit_next_request(struct ci_ep *ci_ep)
426 struct ci_udc *udc = (struct ci_udc *)controller.ctrl->hcor;
427 struct ept_queue_item *item;
428 struct ept_queue_head *head;
429 int bit, num, len, in;
430 struct ci_req *ci_req;
432 uint32_t len_left, len_this_dtd;
433 struct ept_queue_item *dtd, *qtd;
435 ci_ep->req_primed = true;
437 num = ci_ep->desc->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK;
438 in = (ci_ep->desc->bEndpointAddress & USB_DIR_IN) != 0;
439 item = ci_get_qtd(num, in);
440 head = ci_get_qh(num, in);
442 ci_req = list_first_entry(&ci_ep->queue, struct ci_req, queue);
443 len = ci_req->req.length;
445 head->next = (unsigned long)item;
448 ci_req->dtd_count = 0;
449 buf = ci_req->hw_buf;
454 len_this_dtd = min(len_left, (unsigned)EP_MAX_LENGTH_TRANSFER);
456 dtd->info = INFO_BYTES(len_this_dtd) | INFO_ACTIVE;
457 dtd->page0 = (unsigned long)buf;
458 dtd->page1 = ((unsigned long)buf & 0xfffff000) + 0x1000;
459 dtd->page2 = ((unsigned long)buf & 0xfffff000) + 0x2000;
460 dtd->page3 = ((unsigned long)buf & 0xfffff000) + 0x3000;
461 dtd->page4 = ((unsigned long)buf & 0xfffff000) + 0x4000;
463 len_left -= len_this_dtd;
467 qtd = (struct ept_queue_item *)
468 memalign(ILIST_ALIGN, ILIST_ENT_SZ);
469 dtd->next = (unsigned long)qtd;
471 memset(dtd, 0, ILIST_ENT_SZ);
479 * When sending the data for an IN transaction, the attached host
480 * knows that all data for the IN is sent when one of the following
482 * a) A zero-length packet is transmitted.
483 * b) A packet with length that isn't an exact multiple of the ep's
484 * maxpacket is transmitted.
485 * c) Enough data is sent to exactly fill the host's maximum expected
486 * IN transaction size.
488 * One of these conditions MUST apply at the end of an IN transaction,
489 * or the transaction will not be considered complete by the host. If
490 * none of (a)..(c) already applies, then we must force (a) to apply
491 * by explicitly sending an extra zero-length packet.
494 if (in && len && !(len % ci_ep->ep.maxpacket) && ci_req->req.zero) {
496 * Each endpoint has 2 items allocated, even though typically
497 * only 1 is used at a time since either an IN or an OUT but
498 * not both is queued. For an IN transaction, item currently
499 * points at the second of these items, so we know that we
500 * can use the other to transmit the extra zero-length packet.
502 struct ept_queue_item *other_item = ci_get_qtd(num, 0);
503 item->next = (unsigned long)other_item;
505 item->info = INFO_ACTIVE;
508 item->next = TERMINATE;
509 item->info |= INFO_IOC;
513 item = (struct ept_queue_item *)(unsigned long)head->next;
514 while (item->next != TERMINATE) {
515 ci_flush_td((struct ept_queue_item *)(unsigned long)item->next);
516 item = (struct ept_queue_item *)(unsigned long)item->next;
519 DBG("ept%d %s queue len %x, req %p, buffer %p\n",
520 num, in ? "in" : "out", len, ci_req, ci_req->hw_buf);
528 writel(bit, &udc->epprime);
531 static int ci_ep_dequeue(struct usb_ep *_ep, struct usb_request *_req)
533 struct ci_ep *ci_ep = container_of(_ep, struct ci_ep, ep);
534 struct ci_req *ci_req;
536 list_for_each_entry(ci_req, &ci_ep->queue, queue) {
537 if (&ci_req->req == _req)
541 if (&ci_req->req != _req)
544 list_del_init(&ci_req->queue);
546 if (ci_req->req.status == -EINPROGRESS) {
547 ci_req->req.status = -ECONNRESET;
548 if (ci_req->req.complete)
549 ci_req->req.complete(_ep, _req);
555 static int ci_ep_queue(struct usb_ep *ep,
556 struct usb_request *req, gfp_t gfp_flags)
558 struct ci_ep *ci_ep = container_of(ep, struct ci_ep, ep);
559 struct ci_req *ci_req = container_of(req, struct ci_req, req);
561 int __maybe_unused num;
563 num = ci_ep->desc->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK;
564 in = (ci_ep->desc->bEndpointAddress & USB_DIR_IN) != 0;
566 if (!num && ci_ep->req_primed) {
568 * The flipping of ep0 between IN and OUT relies on
569 * ci_ep_queue consuming the current IN/OUT setting
570 * immediately. If this is deferred to a later point when the
571 * req is pulled out of ci_req->queue, then the IN/OUT setting
572 * may have been changed since the req was queued, and state
573 * will get out of sync. This condition doesn't occur today,
574 * but could if bugs were introduced later, and this error
575 * check will save a lot of debugging time.
577 printf("%s: ep0 transaction already in progress\n", __func__);
581 ret = ci_bounce(ci_req, in);
585 DBG("ept%d %s pre-queue req %p, buffer %p\n",
586 num, in ? "in" : "out", ci_req, ci_req->hw_buf);
587 list_add_tail(&ci_req->queue, &ci_ep->queue);
589 if (!ci_ep->req_primed)
590 ci_ep_submit_next_request(ci_ep);
595 static void flip_ep0_direction(void)
597 if (ep0_desc.bEndpointAddress == USB_DIR_IN) {
598 DBG("%s: Flipping ep0 to OUT\n", __func__);
599 ep0_desc.bEndpointAddress = 0;
601 DBG("%s: Flipping ep0 to IN\n", __func__);
602 ep0_desc.bEndpointAddress = USB_DIR_IN;
606 static void handle_ep_complete(struct ci_ep *ci_ep)
608 struct ept_queue_item *item, *next_td;
610 struct ci_req *ci_req;
612 num = ci_ep->desc->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK;
613 in = (ci_ep->desc->bEndpointAddress & USB_DIR_IN) != 0;
614 item = ci_get_qtd(num, in);
615 ci_invalidate_qtd(num);
616 ci_req = list_first_entry(&ci_ep->queue, struct ci_req, queue);
620 for (j = 0; j < ci_req->dtd_count; j++) {
621 ci_invalidate_td(next_td);
623 len += (item->info >> 16) & 0x7fff;
624 if (item->info & 0xff)
625 printf("EP%d/%s FAIL info=%x pg0=%x\n",
626 num, in ? "in" : "out", item->info, item->page0);
627 if (j != ci_req->dtd_count - 1)
628 next_td = (struct ept_queue_item *)(unsigned long)
634 list_del_init(&ci_req->queue);
635 ci_ep->req_primed = false;
637 if (!list_empty(&ci_ep->queue))
638 ci_ep_submit_next_request(ci_ep);
640 ci_req->req.actual = ci_req->req.length - len;
641 ci_debounce(ci_req, in);
643 DBG("ept%d %s req %p, complete %x\n",
644 num, in ? "in" : "out", ci_req, len);
645 if (num != 0 || controller.ep0_data_phase)
646 ci_req->req.complete(&ci_ep->ep, &ci_req->req);
647 if (num == 0 && controller.ep0_data_phase) {
649 * Data Stage is complete, so flip ep0 dir for Status Stage,
650 * which always transfers a packet in the opposite direction.
652 DBG("%s: flip ep0 dir for Status Stage\n", __func__);
653 flip_ep0_direction();
654 controller.ep0_data_phase = false;
655 ci_req->req.length = 0;
656 usb_ep_queue(&ci_ep->ep, &ci_req->req, 0);
660 #define SETUP(type, request) (((type) << 8) | (request))
662 static void handle_setup(void)
664 struct ci_ep *ci_ep = &controller.ep[0];
665 struct ci_req *ci_req;
666 struct usb_request *req;
667 struct ci_udc *udc = (struct ci_udc *)controller.ctrl->hcor;
668 struct ept_queue_head *head;
669 struct usb_ctrlrequest r;
671 int num, in, _num, _in, i;
674 ci_req = controller.ep0_req;
676 head = ci_get_qh(0, 0); /* EP0 OUT */
679 memcpy(&r, head->setup_data, sizeof(struct usb_ctrlrequest));
680 #ifdef CONFIG_CI_UDC_HAS_HOSTPC
681 writel(EPT_RX(0), &udc->epsetupstat);
683 writel(EPT_RX(0), &udc->epstat);
685 DBG("handle setup %s, %x, %x index %x value %x length %x\n",
686 reqname(r.bRequest), r.bRequestType, r.bRequest, r.wIndex,
687 r.wValue, r.wLength);
689 /* Set EP0 dir for Data Stage based on Setup Stage data */
690 if (r.bRequestType & USB_DIR_IN) {
691 DBG("%s: Set ep0 to IN for Data Stage\n", __func__);
692 ep0_desc.bEndpointAddress = USB_DIR_IN;
694 DBG("%s: Set ep0 to OUT for Data Stage\n", __func__);
695 ep0_desc.bEndpointAddress = 0;
698 controller.ep0_data_phase = true;
700 /* 0 length -> no Data Stage. Flip dir for Status Stage */
701 DBG("%s: 0 length: flip ep0 dir for Status Stage\n", __func__);
702 flip_ep0_direction();
703 controller.ep0_data_phase = false;
706 list_del_init(&ci_req->queue);
707 ci_ep->req_primed = false;
709 switch (SETUP(r.bRequestType, r.bRequest)) {
710 case SETUP(USB_RECIP_ENDPOINT, USB_REQ_CLEAR_FEATURE):
711 _num = r.wIndex & 15;
712 _in = !!(r.wIndex & 0x80);
714 if ((r.wValue == 0) && (r.wLength == 0)) {
716 for (i = 0; i < NUM_ENDPOINTS; i++) {
717 struct ci_ep *ep = &controller.ep[i];
721 num = ep->desc->bEndpointAddress
722 & USB_ENDPOINT_NUMBER_MASK;
723 in = (ep->desc->bEndpointAddress
725 if ((num == _num) && (in == _in)) {
726 ep_enable(num, in, ep->ep.maxpacket);
727 usb_ep_queue(controller.gadget.ep0,
735 case SETUP(USB_RECIP_DEVICE, USB_REQ_SET_ADDRESS):
737 * write address delayed (will take effect
738 * after the next IN txn)
740 writel((r.wValue << 25) | (1 << 24), &udc->devaddr);
742 usb_ep_queue(controller.gadget.ep0, req, 0);
745 case SETUP(USB_DIR_IN | USB_RECIP_DEVICE, USB_REQ_GET_STATUS):
747 buf = (char *)req->buf;
748 buf[0] = 1 << USB_DEVICE_SELF_POWERED;
750 usb_ep_queue(controller.gadget.ep0, req, 0);
753 /* pass request up to the gadget driver */
754 if (controller.driver)
755 status = controller.driver->setup(&controller.gadget, &r);
761 DBG("STALL reqname %s type %x value %x, index %x\n",
762 reqname(r.bRequest), r.bRequestType, r.wValue, r.wIndex);
763 writel((1<<16) | (1 << 0), &udc->epctrl[0]);
766 static void stop_activity(void)
769 struct ept_queue_head *head;
770 struct ci_udc *udc = (struct ci_udc *)controller.ctrl->hcor;
771 writel(readl(&udc->epcomp), &udc->epcomp);
772 #ifdef CONFIG_CI_UDC_HAS_HOSTPC
773 writel(readl(&udc->epsetupstat), &udc->epsetupstat);
775 writel(readl(&udc->epstat), &udc->epstat);
776 writel(0xffffffff, &udc->epflush);
778 /* error out any pending reqs */
779 for (i = 0; i < NUM_ENDPOINTS; i++) {
781 writel(0, &udc->epctrl[i]);
782 if (controller.ep[i].desc) {
783 num = controller.ep[i].desc->bEndpointAddress
784 & USB_ENDPOINT_NUMBER_MASK;
785 in = (controller.ep[i].desc->bEndpointAddress
787 head = ci_get_qh(num, in);
788 head->info = INFO_ACTIVE;
796 struct ci_udc *udc = (struct ci_udc *)controller.ctrl->hcor;
797 unsigned n = readl(&udc->usbsts);
798 writel(n, &udc->usbsts);
801 n &= (STS_SLI | STS_URI | STS_PCI | STS_UI | STS_UEI);
806 DBG("-- reset --\n");
810 DBG("-- suspend --\n");
814 int speed = USB_SPEED_FULL;
816 #ifdef CONFIG_CI_UDC_HAS_HOSTPC
817 bit = (readl(&udc->hostpc1_devlc) >> 25) & 3;
819 bit = (readl(&udc->portsc) >> 26) & 3;
821 DBG("-- portchange %x %s\n", bit, (bit == 2) ? "High" : "Full");
823 speed = USB_SPEED_HIGH;
826 controller.gadget.speed = speed;
827 for (i = 1; i < NUM_ENDPOINTS; i++) {
828 if (controller.ep[i].ep.maxpacket > max)
829 controller.ep[i].ep.maxpacket = max;
834 printf("<UEI %x>\n", readl(&udc->epcomp));
836 if ((n & STS_UI) || (n & STS_UEI)) {
837 #ifdef CONFIG_CI_UDC_HAS_HOSTPC
838 n = readl(&udc->epsetupstat);
840 n = readl(&udc->epstat);
845 n = readl(&udc->epcomp);
847 writel(n, &udc->epcomp);
849 for (i = 0; i < NUM_ENDPOINTS && n; i++) {
850 if (controller.ep[i].desc) {
851 num = controller.ep[i].desc->bEndpointAddress
852 & USB_ENDPOINT_NUMBER_MASK;
853 in = (controller.ep[i].desc->bEndpointAddress
855 bit = (in) ? EPT_TX(num) : EPT_RX(num);
857 handle_ep_complete(&controller.ep[i]);
863 int usb_gadget_handle_interrupts(int index)
866 struct ci_udc *udc = (struct ci_udc *)controller.ctrl->hcor;
868 value = readl(&udc->usbsts);
875 void udc_disconnect(void)
877 struct ci_udc *udc = (struct ci_udc *)controller.ctrl->hcor;
880 writel(USBCMD_FS2, &udc->usbcmd);
882 if (controller.driver)
883 controller.driver->disconnect(&controller.gadget);
886 static int ci_pullup(struct usb_gadget *gadget, int is_on)
888 struct ci_udc *udc = (struct ci_udc *)controller.ctrl->hcor;
891 writel(USBCMD_ITC(MICRO_8FRAME) | USBCMD_RST, &udc->usbcmd);
894 ci_init_after_reset(controller.ctrl);
896 writel((unsigned long)controller.epts, &udc->epinitaddr);
898 /* select DEVICE mode */
899 writel(USBMODE_DEVICE, &udc->usbmode);
901 #if !defined(CONFIG_USB_GADGET_DUALSPEED)
902 /* Port force Full-Speed Connect */
903 setbits_le32(&udc->portsc, PFSC);
906 writel(0xffffffff, &udc->epflush);
908 /* Turn on the USB connection by enabling the pullup resistor */
909 setbits_le32(&udc->usbcmd, USBCMD_ITC(MICRO_8FRAME) |
918 static int ci_udc_probe(void)
920 struct ept_queue_head *head;
923 const int num = 2 * NUM_ENDPOINTS;
925 const int eplist_min_align = 4096;
926 const int eplist_align = roundup(eplist_min_align, ARCH_DMA_MINALIGN);
927 const int eplist_raw_sz = num * sizeof(struct ept_queue_head);
928 const int eplist_sz = roundup(eplist_raw_sz, ARCH_DMA_MINALIGN);
930 /* The QH list must be aligned to 4096 bytes. */
931 controller.epts = memalign(eplist_align, eplist_sz);
932 if (!controller.epts)
934 memset(controller.epts, 0, eplist_sz);
936 controller.items_mem = memalign(ILIST_ALIGN, ILIST_SZ);
937 if (!controller.items_mem) {
938 free(controller.epts);
941 memset(controller.items_mem, 0, ILIST_SZ);
943 for (i = 0; i < 2 * NUM_ENDPOINTS; i++) {
945 * Configure QH for each endpoint. The structure of the QH list
946 * is such that each two subsequent fields, N and N+1 where N is
947 * even, in the QH list represent QH for one endpoint. The Nth
948 * entry represents OUT configuration and the N+1th entry does
949 * represent IN configuration of the endpoint.
951 head = controller.epts + i;
953 head->config = CONFIG_MAX_PKT(EP0_MAX_PACKET_SIZE)
954 | CONFIG_ZLT | CONFIG_IOS;
956 head->config = CONFIG_MAX_PKT(EP_MAX_PACKET_SIZE)
958 head->next = TERMINATE;
967 INIT_LIST_HEAD(&controller.gadget.ep_list);
970 memcpy(&controller.ep[0].ep, &ci_ep_init[0], sizeof(*ci_ep_init));
971 controller.ep[0].desc = &ep0_desc;
972 INIT_LIST_HEAD(&controller.ep[0].queue);
973 controller.ep[0].req_primed = false;
974 controller.gadget.ep0 = &controller.ep[0].ep;
975 INIT_LIST_HEAD(&controller.gadget.ep0->ep_list);
978 for (i = 1; i < 4; i++) {
979 memcpy(&controller.ep[i].ep, &ci_ep_init[i],
980 sizeof(*ci_ep_init));
981 INIT_LIST_HEAD(&controller.ep[i].queue);
982 controller.ep[i].req_primed = false;
983 list_add_tail(&controller.ep[i].ep.ep_list,
984 &controller.gadget.ep_list);
988 for (i = 4; i < NUM_ENDPOINTS; i++) {
989 memcpy(&controller.ep[i].ep, &ci_ep_init[4],
990 sizeof(*ci_ep_init));
991 INIT_LIST_HEAD(&controller.ep[i].queue);
992 controller.ep[i].req_primed = false;
993 list_add_tail(&controller.ep[i].ep.ep_list,
994 &controller.gadget.ep_list);
997 ci_ep_alloc_request(&controller.ep[0].ep, 0);
998 if (!controller.ep0_req) {
999 free(controller.items_mem);
1000 free(controller.epts);
1007 int usb_gadget_register_driver(struct usb_gadget_driver *driver)
1013 if (!driver->bind || !driver->setup || !driver->disconnect)
1015 if (driver->speed != USB_SPEED_FULL && driver->speed != USB_SPEED_HIGH)
1018 #if CONFIG_IS_ENABLED(DM_USB)
1019 ret = usb_setup_ehci_gadget(&controller.ctrl);
1021 ret = usb_lowlevel_init(0, USB_INIT_DEVICE, (void **)&controller.ctrl);
1026 ret = ci_udc_probe();
1028 DBG("udc probe failed, returned %d\n", ret);
1032 ret = driver->bind(&controller.gadget);
1034 DBG("driver->bind() returned %d\n", ret);
1037 controller.driver = driver;
1042 int usb_gadget_unregister_driver(struct usb_gadget_driver *driver)
1046 driver->unbind(&controller.gadget);
1047 controller.driver = NULL;
1049 ci_ep_free_request(&controller.ep[0].ep, &controller.ep0_req->req);
1050 free(controller.items_mem);
1051 free(controller.epts);
1056 bool dfu_usb_get_reset(void)
1058 struct ci_udc *udc = (struct ci_udc *)controller.ctrl->hcor;
1060 return !!(readl(&udc->usbsts) & STS_URI);