// SPDX-License-Identifier: GPL-2.0+ /* * Copyright 2011, Marvell Semiconductor Inc. * Lei Wen <leiwen@marvell.com> * * Back ported to the 8xx platform (from the 8260 platform) by * Murray.Jensen@cmst.csiro.au, 27-Jan-01. */ #include <common.h> #include <command.h> #include <config.h> #include <cpu_func.h> #include <net.h> #include <malloc.h> #include <asm/byteorder.h> #include <asm/cache.h> #include <linux/delay.h> #include <linux/errno.h> #include <asm/io.h> #include <asm/unaligned.h> #include <linux/types.h> #include <linux/usb/ch9.h> #include <linux/usb/gadget.h> #include <usb/ci_udc.h> #include "../host/ehci.h" #include "ci_udc.h" /* * Check if the system has too long cachelines. If the cachelines are * longer then 128b, the driver will not be able flush/invalidate data * cache over separate QH entries. We use 128b because one QH entry is * 64b long and there are always two QH list entries for each endpoint. */ #if ARCH_DMA_MINALIGN > 128 #error This driver can not work on systems with caches longer than 128b #endif /* * Every QTD must be individually aligned, since we can program any * QTD's address into HW. Cache flushing requires ARCH_DMA_MINALIGN, * and the USB HW requires 32-byte alignment. Align to both: */ #define ILIST_ALIGN roundup(ARCH_DMA_MINALIGN, 32) /* Each QTD is this size */ #define ILIST_ENT_RAW_SZ sizeof(struct ept_queue_item) /* * Align the size of the QTD too, so we can add this value to each * QTD's address to get another aligned address. */ #define ILIST_ENT_SZ roundup(ILIST_ENT_RAW_SZ, ILIST_ALIGN) /* For each endpoint, we need 2 QTDs, one for each of IN and OUT */ #define ILIST_SZ (NUM_ENDPOINTS * 2 * ILIST_ENT_SZ) #define EP_MAX_LENGTH_TRANSFER 0x4000 #ifndef DEBUG #define DBG(x...) do {} while (0) #else #define DBG(x...) printf(x) static const char *reqname(unsigned r) { switch (r) { case USB_REQ_GET_STATUS: return "GET_STATUS"; case USB_REQ_CLEAR_FEATURE: return "CLEAR_FEATURE"; case USB_REQ_SET_FEATURE: return "SET_FEATURE"; case USB_REQ_SET_ADDRESS: return "SET_ADDRESS"; case USB_REQ_GET_DESCRIPTOR: return "GET_DESCRIPTOR"; case USB_REQ_SET_DESCRIPTOR: return "SET_DESCRIPTOR"; case USB_REQ_GET_CONFIGURATION: return "GET_CONFIGURATION"; case USB_REQ_SET_CONFIGURATION: return "SET_CONFIGURATION"; case USB_REQ_GET_INTERFACE: return "GET_INTERFACE"; case USB_REQ_SET_INTERFACE: return "SET_INTERFACE"; default: return "*UNKNOWN*"; } } #endif static struct usb_endpoint_descriptor ep0_desc = { .bLength = sizeof(struct usb_endpoint_descriptor), .bDescriptorType = USB_DT_ENDPOINT, .bEndpointAddress = USB_DIR_IN, .bmAttributes = USB_ENDPOINT_XFER_CONTROL, }; static int ci_pullup(struct usb_gadget *gadget, int is_on); static int ci_ep_enable(struct usb_ep *ep, const struct usb_endpoint_descriptor *desc); static int ci_ep_disable(struct usb_ep *ep); static int ci_ep_queue(struct usb_ep *ep, struct usb_request *req, gfp_t gfp_flags); static int ci_ep_dequeue(struct usb_ep *ep, struct usb_request *req); static struct usb_request * ci_ep_alloc_request(struct usb_ep *ep, unsigned int gfp_flags); static void ci_ep_free_request(struct usb_ep *ep, struct usb_request *_req); static const struct usb_gadget_ops ci_udc_ops = { .pullup = ci_pullup, }; static const struct usb_ep_ops ci_ep_ops = { .enable = ci_ep_enable, .disable = ci_ep_disable, .queue = ci_ep_queue, .dequeue = ci_ep_dequeue, .alloc_request = ci_ep_alloc_request, .free_request = ci_ep_free_request, }; __weak void ci_init_after_reset(struct ehci_ctrl *ctrl) { } /* Init values for USB endpoints. */ static const struct usb_ep ci_ep_init[5] = { [0] = { /* EP 0 */ .maxpacket = 64, .name = "ep0", .ops = &ci_ep_ops, }, [1] = { .maxpacket = 512, .name = "ep1in-bulk", .ops = &ci_ep_ops, }, [2] = { .maxpacket = 512, .name = "ep2out-bulk", .ops = &ci_ep_ops, }, [3] = { .maxpacket = 512, .name = "ep3in-int", .ops = &ci_ep_ops, }, [4] = { .maxpacket = 512, .name = "ep-", .ops = &ci_ep_ops, }, }; static struct ci_drv controller = { .gadget = { .name = "ci_udc", .ops = &ci_udc_ops, .is_dualspeed = 1, .max_speed = USB_SPEED_HIGH, }, }; /** * ci_get_qh() - return queue head for endpoint * @ep_num: Endpoint number * @dir_in: Direction of the endpoint (IN = 1, OUT = 0) * * This function returns the QH associated with particular endpoint * and it's direction. */ static struct ept_queue_head *ci_get_qh(int ep_num, int dir_in) { return &controller.epts[(ep_num * 2) + dir_in]; } /** * ci_get_qtd() - return queue item for endpoint * @ep_num: Endpoint number * @dir_in: Direction of the endpoint (IN = 1, OUT = 0) * * This function returns the QH associated with particular endpoint * and it's direction. */ static struct ept_queue_item *ci_get_qtd(int ep_num, int dir_in) { int index = (ep_num * 2) + dir_in; uint8_t *imem = controller.items_mem + (index * ILIST_ENT_SZ); return (struct ept_queue_item *)imem; } /** * ci_flush_qh - flush cache over queue head * @ep_num: Endpoint number * * This function flushes cache over QH for particular endpoint. */ static void ci_flush_qh(int ep_num) { struct ept_queue_head *head = ci_get_qh(ep_num, 0); const unsigned long start = (unsigned long)head; const unsigned long end = start + 2 * sizeof(*head); flush_dcache_range(start, end); } /** * ci_invalidate_qh - invalidate cache over queue head * @ep_num: Endpoint number * * This function invalidates cache over QH for particular endpoint. */ static void ci_invalidate_qh(int ep_num) { struct ept_queue_head *head = ci_get_qh(ep_num, 0); unsigned long start = (unsigned long)head; unsigned long end = start + 2 * sizeof(*head); invalidate_dcache_range(start, end); } /** * ci_flush_qtd - flush cache over queue item * @ep_num: Endpoint number * * This function flushes cache over qTD pair for particular endpoint. */ static void ci_flush_qtd(int ep_num) { struct ept_queue_item *item = ci_get_qtd(ep_num, 0); const unsigned long start = (unsigned long)item; const unsigned long end = start + 2 * ILIST_ENT_SZ; flush_dcache_range(start, end); } /** * ci_flush_td - flush cache over queue item * @td: td pointer * * This function flushes cache for particular transfer descriptor. */ static void ci_flush_td(struct ept_queue_item *td) { const unsigned long start = (unsigned long)td; const unsigned long end = (unsigned long)td + ILIST_ENT_SZ; flush_dcache_range(start, end); } /** * ci_invalidate_qtd - invalidate cache over queue item * @ep_num: Endpoint number * * This function invalidates cache over qTD pair for particular endpoint. */ static void ci_invalidate_qtd(int ep_num) { struct ept_queue_item *item = ci_get_qtd(ep_num, 0); const unsigned long start = (unsigned long)item; const unsigned long end = start + 2 * ILIST_ENT_SZ; invalidate_dcache_range(start, end); } /** * ci_invalidate_td - invalidate cache over queue item * @td: td pointer * * This function invalidates cache for particular transfer descriptor. */ static void ci_invalidate_td(struct ept_queue_item *td) { const unsigned long start = (unsigned long)td; const unsigned long end = start + ILIST_ENT_SZ; invalidate_dcache_range(start, end); } static struct usb_request * ci_ep_alloc_request(struct usb_ep *ep, unsigned int gfp_flags) { struct ci_ep *ci_ep = container_of(ep, struct ci_ep, ep); int num = -1; struct ci_req *ci_req; if (ci_ep->desc) num = ci_ep->desc->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK; if (num == 0 && controller.ep0_req) return &controller.ep0_req->req; ci_req = calloc(1, sizeof(*ci_req)); if (!ci_req) return NULL; INIT_LIST_HEAD(&ci_req->queue); if (num == 0) controller.ep0_req = ci_req; return &ci_req->req; } static void ci_ep_free_request(struct usb_ep *ep, struct usb_request *req) { struct ci_ep *ci_ep = container_of(ep, struct ci_ep, ep); struct ci_req *ci_req = container_of(req, struct ci_req, req); int num = -1; if (ci_ep->desc) num = ci_ep->desc->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK; if (num == 0) { if (!controller.ep0_req) return; controller.ep0_req = 0; } if (ci_req->b_buf) free(ci_req->b_buf); free(ci_req); } static void ep_enable(int num, int in, int maxpacket) { struct ci_udc *udc = (struct ci_udc *)controller.ctrl->hcor; unsigned n; n = readl(&udc->epctrl[num]); if (in) n |= (CTRL_TXE | CTRL_TXR | CTRL_TXT_BULK); else n |= (CTRL_RXE | CTRL_RXR | CTRL_RXT_BULK); if (num != 0) { struct ept_queue_head *head = ci_get_qh(num, in); head->config = CONFIG_MAX_PKT(maxpacket) | CONFIG_ZLT; ci_flush_qh(num); } writel(n, &udc->epctrl[num]); } static int ci_ep_enable(struct usb_ep *ep, const struct usb_endpoint_descriptor *desc) { struct ci_ep *ci_ep = container_of(ep, struct ci_ep, ep); int num, in; num = desc->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK; in = (desc->bEndpointAddress & USB_DIR_IN) != 0; ci_ep->desc = desc; ep->desc = desc; if (num) { int max = get_unaligned_le16(&desc->wMaxPacketSize); if ((max > 64) && (controller.gadget.speed == USB_SPEED_FULL)) max = 64; if (ep->maxpacket != max) { DBG("%s: from %d to %d\n", __func__, ep->maxpacket, max); ep->maxpacket = max; } } ep_enable(num, in, ep->maxpacket); DBG("%s: num=%d maxpacket=%d\n", __func__, num, ep->maxpacket); return 0; } static int ci_ep_disable(struct usb_ep *ep) { struct ci_ep *ci_ep = container_of(ep, struct ci_ep, ep); ci_ep->desc = NULL; ep->desc = NULL; return 0; } static int ci_bounce(struct ci_req *ci_req, int in) { struct usb_request *req = &ci_req->req; unsigned long addr = (unsigned long)req->buf; unsigned long hwaddr; uint32_t aligned_used_len; /* Input buffer address is not aligned. */ if (addr & (ARCH_DMA_MINALIGN - 1)) goto align; /* Input buffer length is not aligned. */ if (req->length & (ARCH_DMA_MINALIGN - 1)) goto align; /* The buffer is well aligned, only flush cache. */ ci_req->hw_len = req->length; ci_req->hw_buf = req->buf; goto flush; align: if (ci_req->b_buf && req->length > ci_req->b_len) { free(ci_req->b_buf); ci_req->b_buf = 0; } if (!ci_req->b_buf) { ci_req->b_len = roundup(req->length, ARCH_DMA_MINALIGN); ci_req->b_buf = memalign(ARCH_DMA_MINALIGN, ci_req->b_len); if (!ci_req->b_buf) return -ENOMEM; } ci_req->hw_len = ci_req->b_len; ci_req->hw_buf = ci_req->b_buf; if (in) memcpy(ci_req->hw_buf, req->buf, req->length); flush: hwaddr = (unsigned long)ci_req->hw_buf; if (!hwaddr) return 0; aligned_used_len = roundup(req->length, ARCH_DMA_MINALIGN); flush_dcache_range(hwaddr, hwaddr + aligned_used_len); return 0; } static void ci_debounce(struct ci_req *ci_req, int in) { struct usb_request *req = &ci_req->req; unsigned long addr = (unsigned long)req->buf; unsigned long hwaddr = (unsigned long)ci_req->hw_buf; uint32_t aligned_used_len; if (in || !hwaddr) return; aligned_used_len = roundup(req->actual, ARCH_DMA_MINALIGN); invalidate_dcache_range(hwaddr, hwaddr + aligned_used_len); if (addr == hwaddr) return; /* not a bounce */ memcpy(req->buf, ci_req->hw_buf, req->actual); } static void ci_ep_submit_next_request(struct ci_ep *ci_ep) { struct ci_udc *udc = (struct ci_udc *)controller.ctrl->hcor; struct ept_queue_item *item; struct ept_queue_head *head; int bit, num, len, in; struct ci_req *ci_req; u8 *buf; uint32_t len_left, len_this_dtd; struct ept_queue_item *dtd, *qtd; ci_ep->req_primed = true; num = ci_ep->desc->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK; in = (ci_ep->desc->bEndpointAddress & USB_DIR_IN) != 0; item = ci_get_qtd(num, in); head = ci_get_qh(num, in); ci_req = list_first_entry(&ci_ep->queue, struct ci_req, queue); len = ci_req->req.length; head->next = (unsigned long)item; head->info = 0; ci_req->dtd_count = 0; buf = ci_req->hw_buf; len_left = len; dtd = item; do { len_this_dtd = min(len_left, (unsigned)EP_MAX_LENGTH_TRANSFER); dtd->info = INFO_BYTES(len_this_dtd) | INFO_ACTIVE; dtd->page0 = (unsigned long)buf; dtd->page1 = ((unsigned long)buf & 0xfffff000) + 0x1000; dtd->page2 = ((unsigned long)buf & 0xfffff000) + 0x2000; dtd->page3 = ((unsigned long)buf & 0xfffff000) + 0x3000; dtd->page4 = ((unsigned long)buf & 0xfffff000) + 0x4000; len_left -= len_this_dtd; buf += len_this_dtd; if (len_left) { qtd = (struct ept_queue_item *) memalign(ILIST_ALIGN, ILIST_ENT_SZ); dtd->next = (unsigned long)qtd; dtd = qtd; memset(dtd, 0, ILIST_ENT_SZ); } ci_req->dtd_count++; } while (len_left); item = dtd; /* * When sending the data for an IN transaction, the attached host * knows that all data for the IN is sent when one of the following * occurs: * a) A zero-length packet is transmitted. * b) A packet with length that isn't an exact multiple of the ep's * maxpacket is transmitted. * c) Enough data is sent to exactly fill the host's maximum expected * IN transaction size. * * One of these conditions MUST apply at the end of an IN transaction, * or the transaction will not be considered complete by the host. If * none of (a)..(c) already applies, then we must force (a) to apply * by explicitly sending an extra zero-length packet. */ /* IN !a !b !c */ if (in && len && !(len % ci_ep->ep.maxpacket) && ci_req->req.zero) { /* * Each endpoint has 2 items allocated, even though typically * only 1 is used at a time since either an IN or an OUT but * not both is queued. For an IN transaction, item currently * points at the second of these items, so we know that we * can use the other to transmit the extra zero-length packet. */ struct ept_queue_item *other_item = ci_get_qtd(num, 0); item->next = (unsigned long)other_item; item = other_item; item->info = INFO_ACTIVE; } item->next = TERMINATE; item->info |= INFO_IOC; ci_flush_qtd(num); item = (struct ept_queue_item *)(unsigned long)head->next; while (item->next != TERMINATE) { ci_flush_td((struct ept_queue_item *)(unsigned long)item->next); item = (struct ept_queue_item *)(unsigned long)item->next; } DBG("ept%d %s queue len %x, req %p, buffer %p\n", num, in ? "in" : "out", len, ci_req, ci_req->hw_buf); ci_flush_qh(num); if (in) bit = EPT_TX(num); else bit = EPT_RX(num); writel(bit, &udc->epprime); } static int ci_ep_dequeue(struct usb_ep *_ep, struct usb_request *_req) { struct ci_ep *ci_ep = container_of(_ep, struct ci_ep, ep); struct ci_req *ci_req; list_for_each_entry(ci_req, &ci_ep->queue, queue) { if (&ci_req->req == _req) break; } if (&ci_req->req != _req) return -EINVAL; list_del_init(&ci_req->queue); if (ci_req->req.status == -EINPROGRESS) { ci_req->req.status = -ECONNRESET; if (ci_req->req.complete) ci_req->req.complete(_ep, _req); } return 0; } static int ci_ep_queue(struct usb_ep *ep, struct usb_request *req, gfp_t gfp_flags) { struct ci_ep *ci_ep = container_of(ep, struct ci_ep, ep); struct ci_req *ci_req = container_of(req, struct ci_req, req); int in, ret; int __maybe_unused num; num = ci_ep->desc->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK; in = (ci_ep->desc->bEndpointAddress & USB_DIR_IN) != 0; if (!num && ci_ep->req_primed) { /* * The flipping of ep0 between IN and OUT relies on * ci_ep_queue consuming the current IN/OUT setting * immediately. If this is deferred to a later point when the * req is pulled out of ci_req->queue, then the IN/OUT setting * may have been changed since the req was queued, and state * will get out of sync. This condition doesn't occur today, * but could if bugs were introduced later, and this error * check will save a lot of debugging time. */ printf("%s: ep0 transaction already in progress\n", __func__); return -EPROTO; } ret = ci_bounce(ci_req, in); if (ret) return ret; DBG("ept%d %s pre-queue req %p, buffer %p\n", num, in ? "in" : "out", ci_req, ci_req->hw_buf); list_add_tail(&ci_req->queue, &ci_ep->queue); if (!ci_ep->req_primed) ci_ep_submit_next_request(ci_ep); return 0; } static void flip_ep0_direction(void) { if (ep0_desc.bEndpointAddress == USB_DIR_IN) { DBG("%s: Flipping ep0 to OUT\n", __func__); ep0_desc.bEndpointAddress = 0; } else { DBG("%s: Flipping ep0 to IN\n", __func__); ep0_desc.bEndpointAddress = USB_DIR_IN; } } static void handle_ep_complete(struct ci_ep *ci_ep) { struct ept_queue_item *item, *next_td; int num, in, len, j; struct ci_req *ci_req; num = ci_ep->desc->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK; in = (ci_ep->desc->bEndpointAddress & USB_DIR_IN) != 0; item = ci_get_qtd(num, in); ci_invalidate_qtd(num); ci_req = list_first_entry(&ci_ep->queue, struct ci_req, queue); next_td = item; len = 0; for (j = 0; j < ci_req->dtd_count; j++) { ci_invalidate_td(next_td); item = next_td; len += (item->info >> 16) & 0x7fff; if (item->info & 0xff) printf("EP%d/%s FAIL info=%x pg0=%x\n", num, in ? "in" : "out", item->info, item->page0); if (j != ci_req->dtd_count - 1) next_td = (struct ept_queue_item *)(unsigned long) item->next; if (j != 0) free(item); } list_del_init(&ci_req->queue); ci_ep->req_primed = false; if (!list_empty(&ci_ep->queue)) ci_ep_submit_next_request(ci_ep); ci_req->req.actual = ci_req->req.length - len; ci_debounce(ci_req, in); DBG("ept%d %s req %p, complete %x\n", num, in ? "in" : "out", ci_req, len); if (num != 0 || controller.ep0_data_phase) ci_req->req.complete(&ci_ep->ep, &ci_req->req); if (num == 0 && controller.ep0_data_phase) { /* * Data Stage is complete, so flip ep0 dir for Status Stage, * which always transfers a packet in the opposite direction. */ DBG("%s: flip ep0 dir for Status Stage\n", __func__); flip_ep0_direction(); controller.ep0_data_phase = false; ci_req->req.length = 0; usb_ep_queue(&ci_ep->ep, &ci_req->req, 0); } } #define SETUP(type, request) (((type) << 8) | (request)) static void handle_setup(void) { struct ci_ep *ci_ep = &controller.ep[0]; struct ci_req *ci_req; struct usb_request *req; struct ci_udc *udc = (struct ci_udc *)controller.ctrl->hcor; struct ept_queue_head *head; struct usb_ctrlrequest r; int status = 0; int num, in, _num, _in, i; char *buf; ci_req = controller.ep0_req; req = &ci_req->req; head = ci_get_qh(0, 0); /* EP0 OUT */ ci_invalidate_qh(0); memcpy(&r, head->setup_data, sizeof(struct usb_ctrlrequest)); #ifdef CONFIG_CI_UDC_HAS_HOSTPC writel(EPT_RX(0), &udc->epsetupstat); #else writel(EPT_RX(0), &udc->epstat); #endif DBG("handle setup %s, %x, %x index %x value %x length %x\n", reqname(r.bRequest), r.bRequestType, r.bRequest, r.wIndex, r.wValue, r.wLength); /* Set EP0 dir for Data Stage based on Setup Stage data */ if (r.bRequestType & USB_DIR_IN) { DBG("%s: Set ep0 to IN for Data Stage\n", __func__); ep0_desc.bEndpointAddress = USB_DIR_IN; } else { DBG("%s: Set ep0 to OUT for Data Stage\n", __func__); ep0_desc.bEndpointAddress = 0; } if (r.wLength) { controller.ep0_data_phase = true; } else { /* 0 length -> no Data Stage. Flip dir for Status Stage */ DBG("%s: 0 length: flip ep0 dir for Status Stage\n", __func__); flip_ep0_direction(); controller.ep0_data_phase = false; } list_del_init(&ci_req->queue); ci_ep->req_primed = false; switch (SETUP(r.bRequestType, r.bRequest)) { case SETUP(USB_RECIP_ENDPOINT, USB_REQ_CLEAR_FEATURE): _num = r.wIndex & 15; _in = !!(r.wIndex & 0x80); if ((r.wValue == 0) && (r.wLength == 0)) { req->length = 0; for (i = 0; i < NUM_ENDPOINTS; i++) { struct ci_ep *ep = &controller.ep[i]; if (!ep->desc) continue; num = ep->desc->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK; in = (ep->desc->bEndpointAddress & USB_DIR_IN) != 0; if ((num == _num) && (in == _in)) { ep_enable(num, in, ep->ep.maxpacket); usb_ep_queue(controller.gadget.ep0, req, 0); break; } } } return; case SETUP(USB_RECIP_DEVICE, USB_REQ_SET_ADDRESS): /* * write address delayed (will take effect * after the next IN txn) */ writel((r.wValue << 25) | (1 << 24), &udc->devaddr); req->length = 0; usb_ep_queue(controller.gadget.ep0, req, 0); return; case SETUP(USB_DIR_IN | USB_RECIP_DEVICE, USB_REQ_GET_STATUS): req->length = 2; buf = (char *)req->buf; buf[0] = 1 << USB_DEVICE_SELF_POWERED; buf[1] = 0; usb_ep_queue(controller.gadget.ep0, req, 0); return; } /* pass request up to the gadget driver */ if (controller.driver) status = controller.driver->setup(&controller.gadget, &r); else status = -ENODEV; if (!status) return; DBG("STALL reqname %s type %x value %x, index %x\n", reqname(r.bRequest), r.bRequestType, r.wValue, r.wIndex); writel((1<<16) | (1 << 0), &udc->epctrl[0]); } static void stop_activity(void) { int i, num, in; struct ept_queue_head *head; struct ci_udc *udc = (struct ci_udc *)controller.ctrl->hcor; writel(readl(&udc->epcomp), &udc->epcomp); #ifdef CONFIG_CI_UDC_HAS_HOSTPC writel(readl(&udc->epsetupstat), &udc->epsetupstat); #endif writel(readl(&udc->epstat), &udc->epstat); writel(0xffffffff, &udc->epflush); /* error out any pending reqs */ for (i = 0; i < NUM_ENDPOINTS; i++) { if (i != 0) writel(0, &udc->epctrl[i]); if (controller.ep[i].desc) { num = controller.ep[i].desc->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK; in = (controller.ep[i].desc->bEndpointAddress & USB_DIR_IN) != 0; head = ci_get_qh(num, in); head->info = INFO_ACTIVE; ci_flush_qh(num); } } } void udc_irq(void) { struct ci_udc *udc = (struct ci_udc *)controller.ctrl->hcor; unsigned n = readl(&udc->usbsts); writel(n, &udc->usbsts); int bit, i, num, in; n &= (STS_SLI | STS_URI | STS_PCI | STS_UI | STS_UEI); if (n == 0) return; if (n & STS_URI) { DBG("-- reset --\n"); stop_activity(); } if (n & STS_SLI) DBG("-- suspend --\n"); if (n & STS_PCI) { int max = 64; int speed = USB_SPEED_FULL; #ifdef CONFIG_CI_UDC_HAS_HOSTPC bit = (readl(&udc->hostpc1_devlc) >> 25) & 3; #else bit = (readl(&udc->portsc) >> 26) & 3; #endif DBG("-- portchange %x %s\n", bit, (bit == 2) ? "High" : "Full"); if (bit == 2) { speed = USB_SPEED_HIGH; max = 512; } controller.gadget.speed = speed; for (i = 1; i < NUM_ENDPOINTS; i++) { if (controller.ep[i].ep.maxpacket > max) controller.ep[i].ep.maxpacket = max; } } if (n & STS_UEI) printf("<UEI %x>\n", readl(&udc->epcomp)); if ((n & STS_UI) || (n & STS_UEI)) { #ifdef CONFIG_CI_UDC_HAS_HOSTPC n = readl(&udc->epsetupstat); #else n = readl(&udc->epstat); #endif if (n & EPT_RX(0)) handle_setup(); n = readl(&udc->epcomp); if (n != 0) writel(n, &udc->epcomp); for (i = 0; i < NUM_ENDPOINTS && n; i++) { if (controller.ep[i].desc) { num = controller.ep[i].desc->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK; in = (controller.ep[i].desc->bEndpointAddress & USB_DIR_IN) != 0; bit = (in) ? EPT_TX(num) : EPT_RX(num); if (n & bit) handle_ep_complete(&controller.ep[i]); } } } } int usb_gadget_handle_interrupts(int index) { u32 value; struct ci_udc *udc = (struct ci_udc *)controller.ctrl->hcor; value = readl(&udc->usbsts); if (value) udc_irq(); return value; } void udc_disconnect(void) { struct ci_udc *udc = (struct ci_udc *)controller.ctrl->hcor; /* disable pullup */ stop_activity(); writel(USBCMD_FS2, &udc->usbcmd); udelay(800); if (controller.driver) controller.driver->disconnect(&controller.gadget); } static int ci_pullup(struct usb_gadget *gadget, int is_on) { struct ci_udc *udc = (struct ci_udc *)controller.ctrl->hcor; if (is_on) { /* RESET */ writel(USBCMD_ITC(MICRO_8FRAME) | USBCMD_RST, &udc->usbcmd); udelay(200); ci_init_after_reset(controller.ctrl); writel((unsigned long)controller.epts, &udc->epinitaddr); /* select DEVICE mode */ writel(USBMODE_DEVICE, &udc->usbmode); #if !defined(CONFIG_USB_GADGET_DUALSPEED) /* Port force Full-Speed Connect */ setbits_le32(&udc->portsc, PFSC); #endif writel(0xffffffff, &udc->epflush); /* Turn on the USB connection by enabling the pullup resistor */ setbits_le32(&udc->usbcmd, USBCMD_ITC(MICRO_8FRAME) | USBCMD_RUN); } else { udc_disconnect(); } return 0; } static int ci_udc_probe(void) { struct ept_queue_head *head; int i; const int num = 2 * NUM_ENDPOINTS; const int eplist_min_align = 4096; const int eplist_align = roundup(eplist_min_align, ARCH_DMA_MINALIGN); const int eplist_raw_sz = num * sizeof(struct ept_queue_head); const int eplist_sz = roundup(eplist_raw_sz, ARCH_DMA_MINALIGN); /* The QH list must be aligned to 4096 bytes. */ controller.epts = memalign(eplist_align, eplist_sz); if (!controller.epts) return -ENOMEM; memset(controller.epts, 0, eplist_sz); controller.items_mem = memalign(ILIST_ALIGN, ILIST_SZ); if (!controller.items_mem) { free(controller.epts); return -ENOMEM; } memset(controller.items_mem, 0, ILIST_SZ); for (i = 0; i < 2 * NUM_ENDPOINTS; i++) { /* * Configure QH for each endpoint. The structure of the QH list * is such that each two subsequent fields, N and N+1 where N is * even, in the QH list represent QH for one endpoint. The Nth * entry represents OUT configuration and the N+1th entry does * represent IN configuration of the endpoint. */ head = controller.epts + i; if (i < 2) head->config = CONFIG_MAX_PKT(EP0_MAX_PACKET_SIZE) | CONFIG_ZLT | CONFIG_IOS; else head->config = CONFIG_MAX_PKT(EP_MAX_PACKET_SIZE) | CONFIG_ZLT; head->next = TERMINATE; head->info = 0; if (i & 1) { ci_flush_qh(i / 2); ci_flush_qtd(i / 2); } } INIT_LIST_HEAD(&controller.gadget.ep_list); /* Init EP 0 */ memcpy(&controller.ep[0].ep, &ci_ep_init[0], sizeof(*ci_ep_init)); controller.ep[0].desc = &ep0_desc; INIT_LIST_HEAD(&controller.ep[0].queue); controller.ep[0].req_primed = false; controller.gadget.ep0 = &controller.ep[0].ep; INIT_LIST_HEAD(&controller.gadget.ep0->ep_list); /* Init EP 1..3 */ for (i = 1; i < 4; i++) { memcpy(&controller.ep[i].ep, &ci_ep_init[i], sizeof(*ci_ep_init)); INIT_LIST_HEAD(&controller.ep[i].queue); controller.ep[i].req_primed = false; list_add_tail(&controller.ep[i].ep.ep_list, &controller.gadget.ep_list); } /* Init EP 4..n */ for (i = 4; i < NUM_ENDPOINTS; i++) { memcpy(&controller.ep[i].ep, &ci_ep_init[4], sizeof(*ci_ep_init)); INIT_LIST_HEAD(&controller.ep[i].queue); controller.ep[i].req_primed = false; list_add_tail(&controller.ep[i].ep.ep_list, &controller.gadget.ep_list); } ci_ep_alloc_request(&controller.ep[0].ep, 0); if (!controller.ep0_req) { free(controller.items_mem); free(controller.epts); return -ENOMEM; } return 0; } int usb_gadget_register_driver(struct usb_gadget_driver *driver) { int ret; if (!driver) return -EINVAL; if (!driver->bind || !driver->setup || !driver->disconnect) return -EINVAL; #if CONFIG_IS_ENABLED(DM_USB) ret = usb_setup_ehci_gadget(&controller.ctrl); #else ret = usb_lowlevel_init(0, USB_INIT_DEVICE, (void **)&controller.ctrl); #endif if (ret) return ret; ret = ci_udc_probe(); if (ret) { DBG("udc probe failed, returned %d\n", ret); return ret; } ret = driver->bind(&controller.gadget); if (ret) { DBG("driver->bind() returned %d\n", ret); return ret; } controller.driver = driver; return 0; } int usb_gadget_unregister_driver(struct usb_gadget_driver *driver) { udc_disconnect(); driver->unbind(&controller.gadget); controller.driver = NULL; ci_ep_free_request(&controller.ep[0].ep, &controller.ep0_req->req); free(controller.items_mem); free(controller.epts); #if CONFIG_IS_ENABLED(DM_USB) usb_remove_ehci_gadget(&controller.ctrl); #else usb_lowlevel_stop(0); controller.ctrl = NULL; #endif return 0; } bool dfu_usb_get_reset(void) { struct ci_udc *udc = (struct ci_udc *)controller.ctrl->hcor; return !!(readl(&udc->usbsts) & STS_URI); }