1 // SPDX-License-Identifier: GPL-2.0
3  * gadget.c - DesignWare USB3 DRD Controller Gadget Framework Link
5  * Copyright (C) 2010-2011 Texas Instruments Incorporated - https://www.ti.com
20 #include <linux/dma-mapping.h>
30 #define DWC3_ALIGN_FRAME(d, n)	(((d)->frame_number + ((d)->interval * (n))) \
31 					& ~((d)->interval - 1))
34  * dwc3_gadget_set_test_mode - enables usb2 test modes
39  * success or -EINVAL if wrong Test Selector is passed.
45 	reg = dwc3_readl(dwc->regs, DWC3_DCTL);  in dwc3_gadget_set_test_mode()
57 		return -EINVAL;  in dwc3_gadget_set_test_mode()
66  * dwc3_gadget_get_link_state - gets current state of usb link
70  * return the link state on success (>= 0) or -ETIMEDOUT.
76 	reg = dwc3_readl(dwc->regs, DWC3_DSTS);  in dwc3_gadget_get_link_state()
82  * dwc3_gadget_set_link_state - sets usb link to a particular state
87  * return 0 on success or -ETIMEDOUT.
99 		while (--retries) {  in dwc3_gadget_set_link_state()
100 			reg = dwc3_readl(dwc->regs, DWC3_DSTS);  in dwc3_gadget_set_link_state()
108 			return -ETIMEDOUT;  in dwc3_gadget_set_link_state()
111 	reg = dwc3_readl(dwc->regs, DWC3_DCTL);  in dwc3_gadget_set_link_state()
115 	dwc3_writel(dwc->regs, DWC3_DCTL, reg);  in dwc3_gadget_set_link_state()
119 	dwc3_writel(dwc->regs, DWC3_DCTL, reg);  in dwc3_gadget_set_link_state()
130 	while (--retries) {  in dwc3_gadget_set_link_state()
131 		reg = dwc3_readl(dwc->regs, DWC3_DSTS);  in dwc3_gadget_set_link_state()
139 	return -ETIMEDOUT;  in dwc3_gadget_set_link_state()
146 	if (dwc->ep0state != EP0_SETUP_PHASE) {  in dwc3_ep0_reset_state()
147 		dir = !!dwc->ep0_expect_in;  in dwc3_ep0_reset_state()
148 		if (dwc->ep0state == EP0_DATA_PHASE)  in dwc3_ep0_reset_state()
149 			dwc3_ep0_end_control_data(dwc, dwc->eps[dir]);  in dwc3_ep0_reset_state()
151 			dwc3_ep0_end_control_data(dwc, dwc->eps[!dir]);  in dwc3_ep0_reset_state()
153 		dwc->eps[0]->trb_enqueue = 0;  in dwc3_ep0_reset_state()
154 		dwc->eps[1]->trb_enqueue = 0;  in dwc3_ep0_reset_state()
161  * dwc3_ep_inc_trb - increment a trb index.
171 	if (*index == (DWC3_TRB_NUM - 1))  in dwc3_ep_inc_trb()
176  * dwc3_ep_inc_enq - increment endpoint's enqueue pointer
181 	dwc3_ep_inc_trb(&dep->trb_enqueue);  in dwc3_ep_inc_enq()
185  * dwc3_ep_inc_deq - increment endpoint's dequeue pointer
190 	dwc3_ep_inc_trb(&dep->trb_dequeue);  in dwc3_ep_inc_deq()
196 	struct dwc3			*dwc = dep->dwc;  in dwc3_gadget_del_and_unmap_request()
198 	list_del(&req->list);  in dwc3_gadget_del_and_unmap_request()
199 	req->remaining = 0;  in dwc3_gadget_del_and_unmap_request()
200 	req->needs_extra_trb = false;  in dwc3_gadget_del_and_unmap_request()
201 	req->num_trbs = 0;  in dwc3_gadget_del_and_unmap_request()
203 	if (req->request.status == -EINPROGRESS)  in dwc3_gadget_del_and_unmap_request()
204 		req->request.status = status;  in dwc3_gadget_del_and_unmap_request()
206 	if (req->trb)  in dwc3_gadget_del_and_unmap_request()
207 		usb_gadget_unmap_request_by_dev(dwc->sysdev,  in dwc3_gadget_del_and_unmap_request()
208 				&req->request, req->direction);  in dwc3_gadget_del_and_unmap_request()
210 	req->trb = NULL;  in dwc3_gadget_del_and_unmap_request()
213 	if (dep->number > 1)  in dwc3_gadget_del_and_unmap_request()
214 		pm_runtime_put(dwc->dev);  in dwc3_gadget_del_and_unmap_request()
218  * dwc3_gadget_giveback - call struct usb_request's ->complete callback
224  * function will unmap @req and call its ->complete() callback to notify upper
230 	struct dwc3			*dwc = dep->dwc;  in dwc3_gadget_giveback()
233 	req->status = DWC3_REQUEST_STATUS_COMPLETED;  in dwc3_gadget_giveback()
235 	spin_unlock(&dwc->lock);  in dwc3_gadget_giveback()
236 	usb_gadget_giveback_request(&dep->endpoint, &req->request);  in dwc3_gadget_giveback()
237 	spin_lock(&dwc->lock);  in dwc3_gadget_giveback()
241  * dwc3_send_gadget_generic_command - issue a generic command for the controller
257 	dwc3_writel(dwc->regs, DWC3_DGCMDPAR, param);  in dwc3_send_gadget_generic_command()
258 	dwc3_writel(dwc->regs, DWC3_DGCMD, cmd | DWC3_DGCMD_CMDACT);  in dwc3_send_gadget_generic_command()
261 		reg = dwc3_readl(dwc->regs, DWC3_DGCMD);  in dwc3_send_gadget_generic_command()
265 				ret = -EINVAL;  in dwc3_send_gadget_generic_command()
268 	} while (--timeout);  in dwc3_send_gadget_generic_command()
271 		ret = -ETIMEDOUT;  in dwc3_send_gadget_generic_command()
272 		status = -ETIMEDOUT;  in dwc3_send_gadget_generic_command()
283  * dwc3_send_gadget_ep_cmd - issue an endpoint command
294 	const struct usb_endpoint_descriptor *desc = dep->endpoint.desc;  in dwc3_send_gadget_ep_cmd()
295 	struct dwc3		*dwc = dep->dwc;  in dwc3_send_gadget_ep_cmd()
301 	int			ret = -EINVAL;  in dwc3_send_gadget_ep_cmd()
313 	if (dwc->gadget->speed <= USB_SPEED_HIGH ||  in dwc3_send_gadget_ep_cmd()
315 		reg = dwc3_readl(dwc->regs, DWC3_GUSB2PHYCFG(0));  in dwc3_send_gadget_ep_cmd()
327 			dwc3_writel(dwc->regs, DWC3_GUSB2PHYCFG(0), reg);  in dwc3_send_gadget_ep_cmd()
342 			if (dwc->gadget->speed >= USB_SPEED_SUPER)  in dwc3_send_gadget_ep_cmd()
348 			dev_WARN_ONCE(dwc->dev, ret, "wakeup failed --> %d\n",  in dwc3_send_gadget_ep_cmd()
361 		dwc3_writel(dep->regs, DWC3_DEPCMDPAR0, params->param0);  in dwc3_send_gadget_ep_cmd()
362 		dwc3_writel(dep->regs, DWC3_DEPCMDPAR1, params->param1);  in dwc3_send_gadget_ep_cmd()
363 		dwc3_writel(dep->regs, DWC3_DEPCMDPAR2, params->param2);  in dwc3_send_gadget_ep_cmd()
387 	dwc3_writel(dep->regs, DWC3_DEPCMD, cmd);  in dwc3_send_gadget_ep_cmd()
397 		reg = dwc3_readl(dep->regs, DWC3_DEPCMD);  in dwc3_send_gadget_ep_cmd()
406 				dev_WARN(dwc->dev, "No resource for %s\n",  in dwc3_send_gadget_ep_cmd()
407 					 dep->name);  in dwc3_send_gadget_ep_cmd()
408 				ret = -EINVAL;  in dwc3_send_gadget_ep_cmd()
418 				 * Instead of always returning -EINVAL, let's  in dwc3_send_gadget_ep_cmd()
420 				 * the case by returning -EAGAIN.  in dwc3_send_gadget_ep_cmd()
422 				ret = -EAGAIN;  in dwc3_send_gadget_ep_cmd()
425 				dev_WARN(dwc->dev, "UNKNOWN cmd status\n");  in dwc3_send_gadget_ep_cmd()
430 	} while (--timeout);  in dwc3_send_gadget_ep_cmd()
433 		ret = -ETIMEDOUT;  in dwc3_send_gadget_ep_cmd()
434 		cmd_status = -ETIMEDOUT;  in dwc3_send_gadget_ep_cmd()
442 			dep->flags |= DWC3_EP_TRANSFER_STARTED;  in dwc3_send_gadget_ep_cmd()
444 		if (ret != -ETIMEDOUT)  in dwc3_send_gadget_ep_cmd()
449 		reg = dwc3_readl(dwc->regs, DWC3_GUSB2PHYCFG(0));  in dwc3_send_gadget_ep_cmd()
451 		dwc3_writel(dwc->regs, DWC3_GUSB2PHYCFG(0), reg);  in dwc3_send_gadget_ep_cmd()
459 	struct dwc3 *dwc = dep->dwc;  in dwc3_send_clear_stall_ep_cmd()
467 	 * some (non-compliant) hosts may not send ACK TPs for pending  in dwc3_send_clear_stall_ep_cmd()
471 	if (dep->direction &&  in dwc3_send_clear_stall_ep_cmd()
473 	    (dwc->gadget->speed >= USB_SPEED_SUPER))  in dwc3_send_clear_stall_ep_cmd()
484 	u32		offset = (char *) trb - (char *) dep->trb_pool;  in dwc3_trb_dma_offset()
486 	return dep->trb_pool_dma + offset;  in dwc3_trb_dma_offset()
491 	struct dwc3		*dwc = dep->dwc;  in dwc3_alloc_trb_pool()
493 	if (dep->trb_pool)  in dwc3_alloc_trb_pool()
496 	dep->trb_pool = dma_alloc_coherent(dwc->sysdev,  in dwc3_alloc_trb_pool()
498 			&dep->trb_pool_dma, GFP_KERNEL);  in dwc3_alloc_trb_pool()
499 	if (!dep->trb_pool) {  in dwc3_alloc_trb_pool()
500 		dev_err(dep->dwc->dev, "failed to allocate trb pool for %s\n",  in dwc3_alloc_trb_pool()
501 				dep->name);  in dwc3_alloc_trb_pool()
502 		return -ENOMEM;  in dwc3_alloc_trb_pool()
510 	struct dwc3		*dwc = dep->dwc;  in dwc3_free_trb_pool()
512 	dma_free_coherent(dwc->sysdev, sizeof(struct dwc3_trb) * DWC3_TRB_NUM,  in dwc3_free_trb_pool()
513 			dep->trb_pool, dep->trb_pool_dma);  in dwc3_free_trb_pool()
515 	dep->trb_pool = NULL;  in dwc3_free_trb_pool()
516 	dep->trb_pool_dma = 0;  in dwc3_free_trb_pool()
532  * dwc3_gadget_start_config - configure ep resources
561  * triggered only when called for EP0-out, which always happens first, and which
572 	if (dep->number)  in dwc3_gadget_start_config()
577 	dwc = dep->dwc;  in dwc3_gadget_start_config()
584 		struct dwc3_ep *dep = dwc->eps[i];  in dwc3_gadget_start_config()
602 	struct dwc3 *dwc = dep->dwc;  in dwc3_gadget_set_ep_config()
604 	comp_desc = dep->endpoint.comp_desc;  in dwc3_gadget_set_ep_config()
605 	desc = dep->endpoint.desc;  in dwc3_gadget_set_ep_config()
613 	if (dwc->gadget->speed >= USB_SPEED_SUPER) {  in dwc3_gadget_set_ep_config()
614 		u32 burst = dep->endpoint.maxburst;  in dwc3_gadget_set_ep_config()
616 		params.param0 |= DWC3_DEPCFG_BURST_SIZE(burst - 1);  in dwc3_gadget_set_ep_config()
621 		params.param2 |= dep->saved_state;  in dwc3_gadget_set_ep_config()
626 	if (dep->number <= 1 || usb_endpoint_xfer_isoc(desc))  in dwc3_gadget_set_ep_config()
633 		dep->stream_capable = true;  in dwc3_gadget_set_ep_config()
645 	params.param1 |= DWC3_DEPCFG_EP_NUMBER(dep->number);  in dwc3_gadget_set_ep_config()
651 	if (dep->direction)  in dwc3_gadget_set_ep_config()
652 		params.param0 |= DWC3_DEPCFG_FIFO_NUMBER(dep->number >> 1);  in dwc3_gadget_set_ep_config()
654 	if (desc->bInterval) {  in dwc3_gadget_set_ep_config()
665 		bInterval_m1 = min_t(u8, desc->bInterval - 1, 13);  in dwc3_gadget_set_ep_config()
668 		    dwc->gadget->speed == USB_SPEED_FULL)  in dwc3_gadget_set_ep_config()
669 			dep->interval = desc->bInterval;  in dwc3_gadget_set_ep_config()
671 			dep->interval = 1 << (desc->bInterval - 1);  in dwc3_gadget_set_ep_config()
680  * dwc3_gadget_calc_tx_fifo_size - calculates the txfifo size value
715  * dwc3_gadget_clear_tx_fifos - Clears txfifo allocation
728 	if (!dwc->do_fifo_resize)  in dwc3_gadget_clear_tx_fifos()
732 	dep = dwc->eps[1];  in dwc3_gadget_clear_tx_fifos()
733 	size = dwc3_readl(dwc->regs, DWC3_GTXFIFOSIZ(0));  in dwc3_gadget_clear_tx_fifos()
739 	dwc->last_fifo_depth = fifo_depth;  in dwc3_gadget_clear_tx_fifos()
741 	for (num = 3; num < min_t(int, dwc->num_eps, DWC3_ENDPOINTS_NUM);  in dwc3_gadget_clear_tx_fifos()
743 		dep = dwc->eps[num];  in dwc3_gadget_clear_tx_fifos()
746 			dwc3_readl(dwc->regs, DWC3_GTXFIFOSIZ(num >> 1)) &  in dwc3_gadget_clear_tx_fifos()
749 		dwc3_writel(dwc->regs, DWC3_GTXFIFOSIZ(num >> 1), size);  in dwc3_gadget_clear_tx_fifos()
750 		dep->flags &= ~DWC3_EP_TXFIFO_RESIZED;  in dwc3_gadget_clear_tx_fifos()
752 	dwc->num_ep_resized = 0;  in dwc3_gadget_clear_tx_fifos()
756  * dwc3_gadget_resize_tx_fifos - reallocate fifo spaces for current use-case
764  * on the configured size for RAM1 - which contains TxFifo -,
778 	struct dwc3 *dwc = dep->dwc;  in dwc3_gadget_resize_tx_fifos()
789 	if (!dwc->do_fifo_resize)  in dwc3_gadget_resize_tx_fifos()
793 	if (!usb_endpoint_dir_in(dep->endpoint.desc) || dep->number <= 1)  in dwc3_gadget_resize_tx_fifos()
797 	if (dep->flags & DWC3_EP_TXFIFO_RESIZED)  in dwc3_gadget_resize_tx_fifos()
800 	ram1_depth = DWC3_RAM1_DEPTH(dwc->hwparams.hwparams7);  in dwc3_gadget_resize_tx_fifos()
802 	if ((dep->endpoint.maxburst > 1 &&  in dwc3_gadget_resize_tx_fifos()
803 	     usb_endpoint_xfer_bulk(dep->endpoint.desc)) ||  in dwc3_gadget_resize_tx_fifos()
804 	    usb_endpoint_xfer_isoc(dep->endpoint.desc))  in dwc3_gadget_resize_tx_fifos()
807 	if (dep->endpoint.maxburst > 6 &&  in dwc3_gadget_resize_tx_fifos()
808 	    (usb_endpoint_xfer_bulk(dep->endpoint.desc) ||  in dwc3_gadget_resize_tx_fifos()
809 	     usb_endpoint_xfer_isoc(dep->endpoint.desc)) && DWC3_IP_IS(DWC31))  in dwc3_gadget_resize_tx_fifos()
810 		num_fifos = dwc->tx_fifo_resize_max_num;  in dwc3_gadget_resize_tx_fifos()
816 	num_in_ep = dwc->max_cfg_eps;  in dwc3_gadget_resize_tx_fifos()
817 	num_in_ep -= dwc->num_ep_resized;  in dwc3_gadget_resize_tx_fifos()
821 	remaining = ram1_depth - min_depth - dwc->last_fifo_depth;  in dwc3_gadget_resize_tx_fifos()
828 	fifo_size = (num_fifos - 1) * fifo;  in dwc3_gadget_resize_tx_fifos()
836 	/* Check if TXFIFOs start at non-zero addr */  in dwc3_gadget_resize_tx_fifos()
837 	tmp = dwc3_readl(dwc->regs, DWC3_GTXFIFOSIZ(0));  in dwc3_gadget_resize_tx_fifos()
840 	fifo_size |= (fifo_0_start + (dwc->last_fifo_depth << 16));  in dwc3_gadget_resize_tx_fifos()
842 		dwc->last_fifo_depth += DWC3_GTXFIFOSIZ_TXFDEP(fifo_size);  in dwc3_gadget_resize_tx_fifos()
844 		dwc->last_fifo_depth += DWC31_GTXFIFOSIZ_TXFDEP(fifo_size);  in dwc3_gadget_resize_tx_fifos()
847 	if (dwc->last_fifo_depth >= ram1_depth) {  in dwc3_gadget_resize_tx_fifos()
848 		dev_err(dwc->dev, "Fifosize(%d) > RAM size(%d) %s depth:%d\n",  in dwc3_gadget_resize_tx_fifos()
849 			dwc->last_fifo_depth, ram1_depth,  in dwc3_gadget_resize_tx_fifos()
850 			dep->endpoint.name, fifo_size);  in dwc3_gadget_resize_tx_fifos()
856 		dwc->last_fifo_depth -= fifo_size;  in dwc3_gadget_resize_tx_fifos()
857 		return -ENOMEM;  in dwc3_gadget_resize_tx_fifos()
860 	dwc3_writel(dwc->regs, DWC3_GTXFIFOSIZ(dep->number >> 1), fifo_size);  in dwc3_gadget_resize_tx_fifos()
861 	dep->flags |= DWC3_EP_TXFIFO_RESIZED;  in dwc3_gadget_resize_tx_fifos()
862 	dwc->num_ep_resized++;  in dwc3_gadget_resize_tx_fifos()
868  * __dwc3_gadget_ep_enable - initializes a hw endpoint
877 	const struct usb_endpoint_descriptor *desc = dep->endpoint.desc;  in __dwc3_gadget_ep_enable()
878 	struct dwc3		*dwc = dep->dwc;  in __dwc3_gadget_ep_enable()
883 	if (!(dep->flags & DWC3_EP_ENABLED)) {  in __dwc3_gadget_ep_enable()
897 	if (!(dep->flags & DWC3_EP_ENABLED)) {  in __dwc3_gadget_ep_enable()
901 		dep->type = usb_endpoint_type(desc);  in __dwc3_gadget_ep_enable()
902 		dep->flags |= DWC3_EP_ENABLED;  in __dwc3_gadget_ep_enable()
904 		reg = dwc3_readl(dwc->regs, DWC3_DALEPENA);  in __dwc3_gadget_ep_enable()
905 		reg |= DWC3_DALEPENA_EP(dep->number);  in __dwc3_gadget_ep_enable()
906 		dwc3_writel(dwc->regs, DWC3_DALEPENA, reg);  in __dwc3_gadget_ep_enable()
908 		dep->trb_dequeue = 0;  in __dwc3_gadget_ep_enable()
909 		dep->trb_enqueue = 0;  in __dwc3_gadget_ep_enable()
914 		/* Initialize the TRB ring */  in __dwc3_gadget_ep_enable()
915 		memset(dep->trb_pool, 0,  in __dwc3_gadget_ep_enable()
919 		trb_st_hw = &dep->trb_pool[0];  in __dwc3_gadget_ep_enable()
921 		trb_link = &dep->trb_pool[DWC3_TRB_NUM - 1];  in __dwc3_gadget_ep_enable()
922 		trb_link->bpl = lower_32_bits(dwc3_trb_dma_offset(dep, trb_st_hw));  in __dwc3_gadget_ep_enable()
923 		trb_link->bph = upper_32_bits(dwc3_trb_dma_offset(dep, trb_st_hw));  in __dwc3_gadget_ep_enable()
924 		trb_link->ctrl |= DWC3_TRBCTL_LINK_TRB;  in __dwc3_gadget_ep_enable()
925 		trb_link->ctrl |= DWC3_TRB_CTRL_HWO;  in __dwc3_gadget_ep_enable()
929 	 * Issue StartTransfer here with no-op TRB so we can always rely on No  in __dwc3_gadget_ep_enable()
940 		trb = &dep->trb_pool[0];  in __dwc3_gadget_ep_enable()
952 		if (dep->stream_capable) {  in __dwc3_gadget_ep_enable()
959 			 * no-op TRB as normal, but end it immediately. As a  in __dwc3_gadget_ep_enable()
977 			if (!dep->direction ||  in __dwc3_gadget_ep_enable()
978 			    !(dwc->hwparams.hwparams9 &  in __dwc3_gadget_ep_enable()
980 				dep->flags |= DWC3_EP_FORCE_RESTART_STREAM;  in __dwc3_gadget_ep_enable()
997 	if (dep->flags & DWC3_EP_DELAY_STOP)  in dwc3_remove_requests()
1000 	/* - giveback all requests to gadget driver */  in dwc3_remove_requests()
1001 	while (!list_empty(&dep->started_list)) {  in dwc3_remove_requests()
1002 		req = next_request(&dep->started_list);  in dwc3_remove_requests()
1007 	while (!list_empty(&dep->pending_list)) {  in dwc3_remove_requests()
1008 		req = next_request(&dep->pending_list);  in dwc3_remove_requests()
1013 	while (!list_empty(&dep->cancelled_list)) {  in dwc3_remove_requests()
1014 		req = next_request(&dep->cancelled_list);  in dwc3_remove_requests()
1021  * __dwc3_gadget_ep_disable - disables a hw endpoint
1022  * @dep: the endpoint to disable
1032 	struct dwc3		*dwc = dep->dwc;  in __dwc3_gadget_ep_disable()
1039 	if (dep->flags & DWC3_EP_STALL)  in __dwc3_gadget_ep_disable()
1042 	reg = dwc3_readl(dwc->regs, DWC3_DALEPENA);  in __dwc3_gadget_ep_disable()
1043 	reg &= ~DWC3_DALEPENA_EP(dep->number);  in __dwc3_gadget_ep_disable()
1044 	dwc3_writel(dwc->regs, DWC3_DALEPENA, reg);  in __dwc3_gadget_ep_disable()
1046 	dwc3_remove_requests(dwc, dep, -ESHUTDOWN);  in __dwc3_gadget_ep_disable()
1048 	dep->stream_capable = false;  in __dwc3_gadget_ep_disable()
1049 	dep->type = 0;  in __dwc3_gadget_ep_disable()
1056 	if (dep->flags & DWC3_EP_DELAY_STOP)  in __dwc3_gadget_ep_disable()
1058 	dep->flags &= mask;  in __dwc3_gadget_ep_disable()
1060 	/* Clear out the ep descriptors for non-ep0 */  in __dwc3_gadget_ep_disable()
1061 	if (dep->number > 1) {  in __dwc3_gadget_ep_disable()
1062 		dep->endpoint.comp_desc = NULL;  in __dwc3_gadget_ep_disable()
1063 		dep->endpoint.desc = NULL;  in __dwc3_gadget_ep_disable()
1069 /* -------------------------------------------------------------------------- */
1074 	return -EINVAL;  in dwc3_gadget_ep0_enable()
1079 	return -EINVAL;  in dwc3_gadget_ep0_disable()
1082 /* -------------------------------------------------------------------------- */
1092 	if (!ep || !desc || desc->bDescriptorType != USB_DT_ENDPOINT) {  in dwc3_gadget_ep_enable()
1094 		return -EINVAL;  in dwc3_gadget_ep_enable()
1097 	if (!desc->wMaxPacketSize) {  in dwc3_gadget_ep_enable()
1099 		return -EINVAL;  in dwc3_gadget_ep_enable()
1103 	dwc = dep->dwc;  in dwc3_gadget_ep_enable()
1105 	if (dev_WARN_ONCE(dwc->dev, dep->flags & DWC3_EP_ENABLED,  in dwc3_gadget_ep_enable()
1107 					dep->name))  in dwc3_gadget_ep_enable()
1110 	spin_lock_irqsave(&dwc->lock, flags);  in dwc3_gadget_ep_enable()
1112 	spin_unlock_irqrestore(&dwc->lock, flags);  in dwc3_gadget_ep_enable()
1126 		return -EINVAL;  in dwc3_gadget_ep_disable()
1130 	dwc = dep->dwc;  in dwc3_gadget_ep_disable()
1132 	if (dev_WARN_ONCE(dwc->dev, !(dep->flags & DWC3_EP_ENABLED),  in dwc3_gadget_ep_disable()
1134 					dep->name))  in dwc3_gadget_ep_disable()
1137 	spin_lock_irqsave(&dwc->lock, flags);  in dwc3_gadget_ep_disable()
1139 	spin_unlock_irqrestore(&dwc->lock, flags);  in dwc3_gadget_ep_disable()
1154 	req->direction	= dep->direction;  in dwc3_gadget_ep_alloc_request()
1155 	req->epnum	= dep->number;  in dwc3_gadget_ep_alloc_request()
1156 	req->dep	= dep;  in dwc3_gadget_ep_alloc_request()
1157 	req->status	= DWC3_REQUEST_STATUS_UNKNOWN;  in dwc3_gadget_ep_alloc_request()
1161 	return &req->request;  in dwc3_gadget_ep_alloc_request()
1174  * dwc3_ep_prev_trb - returns the previous TRB in the ring
1175  * @dep: The endpoint with the TRB ring
1176  * @index: The index of the current TRB in the ring
1187 		tmp = DWC3_TRB_NUM - 1;  in dwc3_ep_prev_trb()
1189 	return &dep->trb_pool[tmp - 1];  in dwc3_ep_prev_trb()
1197 	 * If the enqueue & dequeue are equal then the TRB ring is either full  in dwc3_calc_trbs_left()
1198 	 * or empty. It's considered full when there are DWC3_TRB_NUM-1 of TRBs  in dwc3_calc_trbs_left()
1201 	if (dep->trb_enqueue == dep->trb_dequeue) {  in dwc3_calc_trbs_left()
1206 		if (!list_empty(&dep->started_list))  in dwc3_calc_trbs_left()
1209 		return DWC3_TRB_NUM - 1;  in dwc3_calc_trbs_left()
1212 	trbs_left = dep->trb_dequeue - dep->trb_enqueue;  in dwc3_calc_trbs_left()
1213 	trbs_left &= (DWC3_TRB_NUM - 1);  in dwc3_calc_trbs_left()
1215 	if (dep->trb_dequeue < dep->trb_enqueue)  in dwc3_calc_trbs_left()
1216 		trbs_left--;  in dwc3_calc_trbs_left()
1222  * dwc3_prepare_one_trb - setup one TRB from one request
1238 	unsigned int		stream_id = req->request.stream_id;  in dwc3_prepare_one_trb()
1239 	unsigned int		short_not_ok = req->request.short_not_ok;  in dwc3_prepare_one_trb()
1240 	unsigned int		no_interrupt = req->request.no_interrupt;  in dwc3_prepare_one_trb()
1241 	unsigned int		is_last = req->request.is_last;  in dwc3_prepare_one_trb()
1242 	struct dwc3		*dwc = dep->dwc;  in dwc3_prepare_one_trb()
1243 	struct usb_gadget	*gadget = dwc->gadget;  in dwc3_prepare_one_trb()
1244 	enum usb_device_speed	speed = gadget->speed;  in dwc3_prepare_one_trb()
1247 		dma = dep->dwc->bounce_addr;  in dwc3_prepare_one_trb()
1248 	else if (req->request.num_sgs > 0)  in dwc3_prepare_one_trb()
1249 		dma = sg_dma_address(req->start_sg);  in dwc3_prepare_one_trb()
1251 		dma = req->request.dma;  in dwc3_prepare_one_trb()
1253 	trb = &dep->trb_pool[dep->trb_enqueue];  in dwc3_prepare_one_trb()
1255 	if (!req->trb) {  in dwc3_prepare_one_trb()
1257 		req->trb = trb;  in dwc3_prepare_one_trb()
1258 		req->trb_dma = dwc3_trb_dma_offset(dep, trb);  in dwc3_prepare_one_trb()
1261 	req->num_trbs++;  in dwc3_prepare_one_trb()
1263 	trb->size = DWC3_TRB_SIZE_LENGTH(trb_length);  in dwc3_prepare_one_trb()
1264 	trb->bpl = lower_32_bits(dma);  in dwc3_prepare_one_trb()
1265 	trb->bph = upper_32_bits(dma);  in dwc3_prepare_one_trb()
1267 	switch (usb_endpoint_type(dep->endpoint.desc)) {  in dwc3_prepare_one_trb()
1269 		trb->ctrl = DWC3_TRBCTL_CONTROL_SETUP;  in dwc3_prepare_one_trb()
1274 			trb->ctrl = DWC3_TRBCTL_ISOCHRONOUS_FIRST;  in dwc3_prepare_one_trb()
1290 			 *	- DATA0  in dwc3_prepare_one_trb()
1293 			 *	- DATA1, DATA0  in dwc3_prepare_one_trb()
1296 			 *	- DATA2, DATA1, DATA0  in dwc3_prepare_one_trb()
1299 				struct usb_ep *ep = &dep->endpoint;  in dwc3_prepare_one_trb()
1301 				unsigned int maxp = usb_endpoint_maxp(ep->desc);  in dwc3_prepare_one_trb()
1303 				if (req->request.length <= (2 * maxp))  in dwc3_prepare_one_trb()
1304 					mult--;  in dwc3_prepare_one_trb()
1306 				if (req->request.length <= maxp)  in dwc3_prepare_one_trb()
1307 					mult--;  in dwc3_prepare_one_trb()
1309 				trb->size |= DWC3_TRB_SIZE_PCM1(mult);  in dwc3_prepare_one_trb()
1312 			trb->ctrl = DWC3_TRBCTL_ISOCHRONOUS;  in dwc3_prepare_one_trb()
1316 			trb->ctrl |= DWC3_TRB_CTRL_ISP_IMI;  in dwc3_prepare_one_trb()
1321 		trb->ctrl = DWC3_TRBCTL_NORMAL;  in dwc3_prepare_one_trb()
1328 		dev_WARN(dwc->dev, "Unknown endpoint type %d\n",  in dwc3_prepare_one_trb()
1329 				usb_endpoint_type(dep->endpoint.desc));  in dwc3_prepare_one_trb()
1336 	if (usb_endpoint_dir_out(dep->endpoint.desc)) {  in dwc3_prepare_one_trb()
1337 		if (!dep->stream_capable)  in dwc3_prepare_one_trb()
1338 			trb->ctrl |= DWC3_TRB_CTRL_CSP;  in dwc3_prepare_one_trb()
1341 			trb->ctrl |= DWC3_TRB_CTRL_ISP_IMI;  in dwc3_prepare_one_trb()
1345 	if (dep->stream_capable && DWC3_MST_CAPABLE(&dwc->hwparams))  in dwc3_prepare_one_trb()
1346 		trb->ctrl |= DWC3_TRB_CTRL_CSP;  in dwc3_prepare_one_trb()
1349 		trb->ctrl |= DWC3_TRB_CTRL_IOC;  in dwc3_prepare_one_trb()
1352 		trb->ctrl |= DWC3_TRB_CTRL_CHN;  in dwc3_prepare_one_trb()
1353 	else if (dep->stream_capable && is_last &&  in dwc3_prepare_one_trb()
1354 		 !DWC3_MST_CAPABLE(&dwc->hwparams))  in dwc3_prepare_one_trb()
1355 		trb->ctrl |= DWC3_TRB_CTRL_LST;  in dwc3_prepare_one_trb()
1357 	if (usb_endpoint_xfer_bulk(dep->endpoint.desc) && dep->stream_capable)  in dwc3_prepare_one_trb()
1358 		trb->ctrl |= DWC3_TRB_CTRL_SID_SOFN(stream_id);  in dwc3_prepare_one_trb()
1368 	 * However there is a possibility of CPU re-ordering here which can cause  in dwc3_prepare_one_trb()
1370 	 * Add a write memory barrier to prevent CPU re-ordering.  in dwc3_prepare_one_trb()
1373 	trb->ctrl |= DWC3_TRB_CTRL_HWO;  in dwc3_prepare_one_trb()
1382 	unsigned int maxp = usb_endpoint_maxp(dep->endpoint.desc);  in dwc3_needs_extra_trb()
1383 	unsigned int rem = req->request.length % maxp;  in dwc3_needs_extra_trb()
1385 	if ((req->request.length && req->request.zero && !rem &&  in dwc3_needs_extra_trb()
1386 			!usb_endpoint_xfer_isoc(dep->endpoint.desc)) ||  in dwc3_needs_extra_trb()
1387 			(!req->direction && rem))  in dwc3_needs_extra_trb()
1394  * dwc3_prepare_last_sg - prepare TRBs for the last SG entry
1406 	unsigned int maxp = usb_endpoint_maxp(dep->endpoint.desc);  in dwc3_prepare_last_sg()
1407 	unsigned int rem = req->request.length % maxp;  in dwc3_prepare_last_sg()
1416 	req->needs_extra_trb = num_trbs > 1;  in dwc3_prepare_last_sg()
1419 	if (req->direction || req->request.length)  in dwc3_prepare_last_sg()
1421 				req->needs_extra_trb, node, false, false);  in dwc3_prepare_last_sg()
1424 	if ((!req->direction && !req->request.length) || req->needs_extra_trb)  in dwc3_prepare_last_sg()
1426 				req->direction ? 0 : maxp - rem,  in dwc3_prepare_last_sg()
1435 	struct scatterlist *sg = req->start_sg;  in dwc3_prepare_trbs_sg()
1438 	unsigned int length = req->request.length;  in dwc3_prepare_trbs_sg()
1439 	unsigned int remaining = req->request.num_mapped_sgs  in dwc3_prepare_trbs_sg()
1440 		- req->num_queued_sgs;  in dwc3_prepare_trbs_sg()
1441 	unsigned int num_trbs = req->num_trbs;  in dwc3_prepare_trbs_sg()
1448 	for_each_sg(req->request.sg, s, req->num_queued_sgs, i)  in dwc3_prepare_trbs_sg()
1449 		length -= sg_dma_len(s);  in dwc3_prepare_trbs_sg()
1459 		length -= trb_length;  in dwc3_prepare_trbs_sg()
1468 		if ((i == remaining - 1) || !length)  in dwc3_prepare_trbs_sg()
1490 				list_for_each_entry(r, &dep->started_list, list) {  in dwc3_prepare_trbs_sg()
1491 					if (r != req && !r->request.no_interrupt)  in dwc3_prepare_trbs_sg()
1511 			req->start_sg = sg_next(s);  in dwc3_prepare_trbs_sg()
1513 		req->num_queued_sgs++;  in dwc3_prepare_trbs_sg()
1514 		req->num_pending_sgs--;  in dwc3_prepare_trbs_sg()
1522 			req->num_pending_sgs = 0;  in dwc3_prepare_trbs_sg()
1530 	return req->num_trbs - num_trbs;  in dwc3_prepare_trbs_sg()
1536 	return dwc3_prepare_last_sg(dep, req, req->request.length, 0);  in dwc3_prepare_trbs_linear()
1540  * dwc3_prepare_trbs - setup TRBs from requests
1566 	list_for_each_entry(req, &dep->started_list, list) {  in dwc3_prepare_trbs()
1567 		if (req->num_pending_sgs > 0) {  in dwc3_prepare_trbs()
1569 			if (!ret || req->num_pending_sgs)  in dwc3_prepare_trbs()
1581 		if (dep->stream_capable && req->request.is_last &&  in dwc3_prepare_trbs()
1582 		    !DWC3_MST_CAPABLE(&dep->dwc->hwparams))  in dwc3_prepare_trbs()
1586 	list_for_each_entry_safe(req, n, &dep->pending_list, list) {  in dwc3_prepare_trbs()
1587 		struct dwc3	*dwc = dep->dwc;  in dwc3_prepare_trbs()
1589 		ret = usb_gadget_map_request_by_dev(dwc->sysdev, &req->request,  in dwc3_prepare_trbs()
1590 						    dep->direction);  in dwc3_prepare_trbs()
1594 		req->sg			= req->request.sg;  in dwc3_prepare_trbs()
1595 		req->start_sg		= req->sg;  in dwc3_prepare_trbs()
1596 		req->num_queued_sgs	= 0;  in dwc3_prepare_trbs()
1597 		req->num_pending_sgs	= req->request.num_mapped_sgs;  in dwc3_prepare_trbs()
1599 		if (req->num_pending_sgs > 0) {  in dwc3_prepare_trbs()
1601 			if (req->num_pending_sgs)  in dwc3_prepare_trbs()
1615 		if (dep->stream_capable && req->request.is_last &&  in dwc3_prepare_trbs()
1616 		    !DWC3_MST_CAPABLE(&dwc->hwparams))  in dwc3_prepare_trbs()
1642 	starting = !(dep->flags & DWC3_EP_TRANSFER_STARTED);  in __dwc3_gadget_kick_transfer()
1651 	req = next_request(&dep->started_list);  in __dwc3_gadget_kick_transfer()
1653 		dep->flags |= DWC3_EP_PENDING_REQUEST;  in __dwc3_gadget_kick_transfer()
1660 		params.param0 = upper_32_bits(req->trb_dma);  in __dwc3_gadget_kick_transfer()
1661 		params.param1 = lower_32_bits(req->trb_dma);  in __dwc3_gadget_kick_transfer()
1664 		if (dep->stream_capable)  in __dwc3_gadget_kick_transfer()
1665 			cmd |= DWC3_DEPCMD_PARAM(req->request.stream_id);  in __dwc3_gadget_kick_transfer()
1667 		if (usb_endpoint_xfer_isoc(dep->endpoint.desc))  in __dwc3_gadget_kick_transfer()
1668 			cmd |= DWC3_DEPCMD_PARAM(dep->frame_number);  in __dwc3_gadget_kick_transfer()
1671 			DWC3_DEPCMD_PARAM(dep->resource_index);  in __dwc3_gadget_kick_transfer()
1678 		if (ret == -EAGAIN)  in __dwc3_gadget_kick_transfer()
1683 		list_for_each_entry_safe(req, tmp, &dep->started_list, list)  in __dwc3_gadget_kick_transfer()
1687 		if (!(dep->flags & DWC3_EP_END_TRANSFER_PENDING))  in __dwc3_gadget_kick_transfer()
1693 	if (dep->stream_capable && req->request.is_last &&  in __dwc3_gadget_kick_transfer()
1694 	    !DWC3_MST_CAPABLE(&dep->dwc->hwparams))  in __dwc3_gadget_kick_transfer()
1695 		dep->flags |= DWC3_EP_WAIT_TRANSFER_COMPLETE;  in __dwc3_gadget_kick_transfer()
1704 	reg = dwc3_readl(dwc->regs, DWC3_DSTS);  in __dwc3_gadget_get_frame()
1709  * __dwc3_stop_active_transfer - stop the current active transfer
1721 	struct dwc3 *dwc = dep->dwc;  in __dwc3_stop_active_transfer()
1729 	cmd |= DWC3_DEPCMD_PARAM(dep->resource_index);  in __dwc3_stop_active_transfer()
1738 	if (ret == -ETIMEDOUT && dep->dwc->ep0state != EP0_SETUP_PHASE) {  in __dwc3_stop_active_transfer()
1739 		dep->flags |= DWC3_EP_DELAY_STOP;  in __dwc3_stop_active_transfer()
1743 	dep->resource_index = 0;  in __dwc3_stop_active_transfer()
1748 		dep->flags &= ~DWC3_EP_TRANSFER_STARTED;  in __dwc3_stop_active_transfer()
1750 		dep->flags |= DWC3_EP_END_TRANSFER_PENDING;  in __dwc3_stop_active_transfer()
1753 	dep->flags &= ~DWC3_EP_DELAY_STOP;  in __dwc3_stop_active_transfer()
1758  * dwc3_gadget_start_isoc_quirk - workaround invalid frame number
1761  * This function tests for the correct combination of BIT[15:14] from the 16-bit
1765  * In DWC_usb31 version 1.70a-ea06 and prior, for highspeed and fullspeed
1766  * isochronous IN, BIT[15:14] of the 16-bit microframe number reported by the
1770  * internal 16-bit microframe, the START TRANSFER command will pass and the
1773  * other conditions, the START TRANSFER command will fail with bus-expiry.
1778  * (or 2 seconds). 4 seconds into the future will result in a bus-expiry status.
1781  * command status will result in a 2-second delay start. The smaller BIT[15:14]
1805 	while (dep->combo_num < 2) {  in dwc3_gadget_start_isoc_quirk()
1812 		 * 4 uframes in the future with BIT[15:14] as dep->combo_num  in dwc3_gadget_start_isoc_quirk()
1814 		test_frame_number = dep->frame_number & DWC3_FRNUMBER_MASK;  in dwc3_gadget_start_isoc_quirk()
1815 		test_frame_number |= dep->combo_num << 14;  in dwc3_gadget_start_isoc_quirk()
1816 		test_frame_number += max_t(u32, 4, dep->interval);  in dwc3_gadget_start_isoc_quirk()
1818 		params.param0 = upper_32_bits(dep->dwc->bounce_addr);  in dwc3_gadget_start_isoc_quirk()
1819 		params.param1 = lower_32_bits(dep->dwc->bounce_addr);  in dwc3_gadget_start_isoc_quirk()
1825 		/* Redo if some other failure beside bus-expiry is received */  in dwc3_gadget_start_isoc_quirk()
1826 		if (cmd_status && cmd_status != -EAGAIN) {  in dwc3_gadget_start_isoc_quirk()
1827 			dep->start_cmd_status = 0;  in dwc3_gadget_start_isoc_quirk()
1828 			dep->combo_num = 0;  in dwc3_gadget_start_isoc_quirk()
1833 		if (dep->combo_num == 0)  in dwc3_gadget_start_isoc_quirk()
1834 			dep->start_cmd_status = cmd_status;  in dwc3_gadget_start_isoc_quirk()
1836 		dep->combo_num++;  in dwc3_gadget_start_isoc_quirk()
1849 	test0 = (dep->start_cmd_status == 0);  in dwc3_gadget_start_isoc_quirk()
1853 		dep->combo_num = 1;  in dwc3_gadget_start_isoc_quirk()
1855 		dep->combo_num = 2;  in dwc3_gadget_start_isoc_quirk()
1857 		dep->combo_num = 3;  in dwc3_gadget_start_isoc_quirk()
1859 		dep->combo_num = 0;  in dwc3_gadget_start_isoc_quirk()
1861 	dep->frame_number &= DWC3_FRNUMBER_MASK;  in dwc3_gadget_start_isoc_quirk()
1862 	dep->frame_number |= dep->combo_num << 14;  in dwc3_gadget_start_isoc_quirk()
1863 	dep->frame_number += max_t(u32, 4, dep->interval);  in dwc3_gadget_start_isoc_quirk()
1866 	dep->start_cmd_status = 0;  in dwc3_gadget_start_isoc_quirk()
1867 	dep->combo_num = 0;  in dwc3_gadget_start_isoc_quirk()
1874 	const struct usb_endpoint_descriptor *desc = dep->endpoint.desc;  in __dwc3_gadget_start_isoc()
1875 	struct dwc3 *dwc = dep->dwc;  in __dwc3_gadget_start_isoc()
1879 	if (list_empty(&dep->pending_list) &&  in __dwc3_gadget_start_isoc()
1880 	    list_empty(&dep->started_list)) {  in __dwc3_gadget_start_isoc()
1881 		dep->flags |= DWC3_EP_PENDING_REQUEST;  in __dwc3_gadget_start_isoc()
1882 		return -EAGAIN;  in __dwc3_gadget_start_isoc()
1885 	if (!dwc->dis_start_transfer_quirk &&  in __dwc3_gadget_start_isoc()
1888 		if (dwc->gadget->speed <= USB_SPEED_HIGH && dep->direction)  in __dwc3_gadget_start_isoc()
1892 	if (desc->bInterval <= 14 &&  in __dwc3_gadget_start_isoc()
1893 	    dwc->gadget->speed >= USB_SPEED_HIGH) {  in __dwc3_gadget_start_isoc()
1896 				(dep->frame_number & DWC3_FRNUMBER_MASK);  in __dwc3_gadget_start_isoc()
1907 		dep->frame_number = (dep->frame_number & ~DWC3_FRNUMBER_MASK) |  in __dwc3_gadget_start_isoc()
1910 			dep->frame_number += BIT(14);  in __dwc3_gadget_start_isoc()
1917 		if (desc->bInterval < 3)  in __dwc3_gadget_start_isoc()
1918 			future_interval += 3 - desc->bInterval;  in __dwc3_gadget_start_isoc()
1920 		dep->frame_number = DWC3_ALIGN_FRAME(dep, future_interval);  in __dwc3_gadget_start_isoc()
1923 		if (ret != -EAGAIN)  in __dwc3_gadget_start_isoc()
1928 	 * After a number of unsuccessful start attempts due to bus-expiry  in __dwc3_gadget_start_isoc()
1932 	if (ret == -EAGAIN)  in __dwc3_gadget_start_isoc()
1940 	struct dwc3		*dwc = dep->dwc;  in __dwc3_gadget_ep_queue()
1942 	if (!dep->endpoint.desc || !dwc->pullups_connected || !dwc->connected) {  in __dwc3_gadget_ep_queue()
1943 		dev_dbg(dwc->dev, "%s: can't queue to disabled endpoint\n",  in __dwc3_gadget_ep_queue()
1944 				dep->name);  in __dwc3_gadget_ep_queue()
1945 		return -ESHUTDOWN;  in __dwc3_gadget_ep_queue()
1948 	if (WARN(req->dep != dep, "request %pK belongs to '%s'\n",  in __dwc3_gadget_ep_queue()
1949 				&req->request, req->dep->name))  in __dwc3_gadget_ep_queue()
1950 		return -EINVAL;  in __dwc3_gadget_ep_queue()
1952 	if (WARN(req->status < DWC3_REQUEST_STATUS_COMPLETED,  in __dwc3_gadget_ep_queue()
1954 				dep->name, &req->request))  in __dwc3_gadget_ep_queue()
1955 		return -EINVAL;  in __dwc3_gadget_ep_queue()
1957 	pm_runtime_get(dwc->dev);  in __dwc3_gadget_ep_queue()
1959 	req->request.actual	= 0;  in __dwc3_gadget_ep_queue()
1960 	req->request.status	= -EINPROGRESS;  in __dwc3_gadget_ep_queue()
1964 	list_add_tail(&req->list, &dep->pending_list);  in __dwc3_gadget_ep_queue()
1965 	req->status = DWC3_REQUEST_STATUS_QUEUED;  in __dwc3_gadget_ep_queue()
1967 	if (dep->flags & DWC3_EP_WAIT_TRANSFER_COMPLETE)  in __dwc3_gadget_ep_queue()
1974 	if ((dep->flags & DWC3_EP_END_TRANSFER_PENDING) ||  in __dwc3_gadget_ep_queue()
1975 	    (dep->flags & DWC3_EP_WEDGE) ||  in __dwc3_gadget_ep_queue()
1976 	    (dep->flags & DWC3_EP_DELAY_STOP) ||  in __dwc3_gadget_ep_queue()
1977 	    (dep->flags & DWC3_EP_STALL)) {  in __dwc3_gadget_ep_queue()
1978 		dep->flags |= DWC3_EP_DELAY_START;  in __dwc3_gadget_ep_queue()
1985 	 * (micro-)frame number.  in __dwc3_gadget_ep_queue()
1990 	if (usb_endpoint_xfer_isoc(dep->endpoint.desc)) {  in __dwc3_gadget_ep_queue()
1991 		if (!(dep->flags & DWC3_EP_TRANSFER_STARTED)) {  in __dwc3_gadget_ep_queue()
1992 			if ((dep->flags & DWC3_EP_PENDING_REQUEST))  in __dwc3_gadget_ep_queue()
2009 	struct dwc3			*dwc = dep->dwc;  in dwc3_gadget_ep_queue()
2015 	spin_lock_irqsave(&dwc->lock, flags);  in dwc3_gadget_ep_queue()
2017 	spin_unlock_irqrestore(&dwc->lock, flags);  in dwc3_gadget_ep_queue()
2026 	/* If req->trb is not set, then the request has not started */  in dwc3_gadget_ep_skip_trbs()
2027 	if (!req->trb)  in dwc3_gadget_ep_skip_trbs()
2040 	for (i = 0; i < req->num_trbs; i++) {  in dwc3_gadget_ep_skip_trbs()
2043 		trb = &dep->trb_pool[dep->trb_dequeue];  in dwc3_gadget_ep_skip_trbs()
2044 		trb->ctrl &= ~DWC3_TRB_CTRL_HWO;  in dwc3_gadget_ep_skip_trbs()
2048 	req->num_trbs = 0;  in dwc3_gadget_ep_skip_trbs()
2054 	struct dwc3			*dwc = dep->dwc;  in dwc3_gadget_ep_cleanup_cancelled_requests()
2056 	while (!list_empty(&dep->cancelled_list)) {  in dwc3_gadget_ep_cleanup_cancelled_requests()
2057 		req = next_request(&dep->cancelled_list);  in dwc3_gadget_ep_cleanup_cancelled_requests()
2059 		switch (req->status) {  in dwc3_gadget_ep_cleanup_cancelled_requests()
2061 			dwc3_gadget_giveback(dep, req, -ESHUTDOWN);  in dwc3_gadget_ep_cleanup_cancelled_requests()
2064 			dwc3_gadget_giveback(dep, req, -ECONNRESET);  in dwc3_gadget_ep_cleanup_cancelled_requests()
2067 			dwc3_gadget_giveback(dep, req, -EPIPE);  in dwc3_gadget_ep_cleanup_cancelled_requests()
2070 			dev_err(dwc->dev, "request cancelled with wrong reason:%d\n", req->status);  in dwc3_gadget_ep_cleanup_cancelled_requests()
2071 			dwc3_gadget_giveback(dep, req, -ECONNRESET);  in dwc3_gadget_ep_cleanup_cancelled_requests()
2078 		if (!dep->endpoint.desc)  in dwc3_gadget_ep_cleanup_cancelled_requests()
2090 	struct dwc3			*dwc = dep->dwc;  in dwc3_gadget_ep_dequeue()
2097 	spin_lock_irqsave(&dwc->lock, flags);  in dwc3_gadget_ep_dequeue()
2099 	list_for_each_entry(r, &dep->cancelled_list, list) {  in dwc3_gadget_ep_dequeue()
2104 	list_for_each_entry(r, &dep->pending_list, list) {  in dwc3_gadget_ep_dequeue()
2113 			if (dep->number > 1)  in dwc3_gadget_ep_dequeue()
2114 				dwc3_gadget_giveback(dep, req, -ECONNRESET);  in dwc3_gadget_ep_dequeue()
2121 	list_for_each_entry(r, &dep->started_list, list) {  in dwc3_gadget_ep_dequeue()
2132 			list_for_each_entry_safe(r, t, &dep->started_list, list)  in dwc3_gadget_ep_dequeue()
2136 			dep->flags &= ~DWC3_EP_WAIT_TRANSFER_COMPLETE;  in dwc3_gadget_ep_dequeue()
2142 	dev_err(dwc->dev, "request %pK was not queued to %s\n",  in dwc3_gadget_ep_dequeue()
2143 		request, ep->name);  in dwc3_gadget_ep_dequeue()
2144 	ret = -EINVAL;  in dwc3_gadget_ep_dequeue()
2146 	spin_unlock_irqrestore(&dwc->lock, flags);  in dwc3_gadget_ep_dequeue()
2154 	struct dwc3				*dwc = dep->dwc;  in __dwc3_gadget_ep_set_halt()
2159 	if (usb_endpoint_xfer_isoc(dep->endpoint.desc)) {  in __dwc3_gadget_ep_set_halt()
2160 		dev_err(dwc->dev, "%s is of Isochronous type\n", dep->name);  in __dwc3_gadget_ep_set_halt()
2161 		return -EINVAL;  in __dwc3_gadget_ep_set_halt()
2172 		if (dep->number > 1)  in __dwc3_gadget_ep_set_halt()
2173 			trb = dwc3_ep_prev_trb(dep, dep->trb_enqueue);  in __dwc3_gadget_ep_set_halt()
2175 			trb = &dwc->ep0_trb[dep->trb_enqueue];  in __dwc3_gadget_ep_set_halt()
2177 		transfer_in_flight = trb->ctrl & DWC3_TRB_CTRL_HWO;  in __dwc3_gadget_ep_set_halt()
2178 		started = !list_empty(&dep->started_list);  in __dwc3_gadget_ep_set_halt()
2180 		if (!protocol && ((dep->direction && transfer_in_flight) ||  in __dwc3_gadget_ep_set_halt()
2181 				(!dep->direction && started))) {  in __dwc3_gadget_ep_set_halt()
2182 			return -EAGAIN;  in __dwc3_gadget_ep_set_halt()
2188 			dev_err(dwc->dev, "failed to set STALL on %s\n",  in __dwc3_gadget_ep_set_halt()
2189 					dep->name);  in __dwc3_gadget_ep_set_halt()
2191 			dep->flags |= DWC3_EP_STALL;  in __dwc3_gadget_ep_set_halt()
2198 		if (dep->number <= 1) {  in __dwc3_gadget_ep_set_halt()
2199 			dep->flags &= ~(DWC3_EP_STALL | DWC3_EP_WEDGE);  in __dwc3_gadget_ep_set_halt()
2205 		list_for_each_entry_safe(req, tmp, &dep->started_list, list)  in __dwc3_gadget_ep_set_halt()
2208 		if (dep->flags & DWC3_EP_END_TRANSFER_PENDING ||  in __dwc3_gadget_ep_set_halt()
2209 		    (dep->flags & DWC3_EP_DELAY_STOP)) {  in __dwc3_gadget_ep_set_halt()
2210 			dep->flags |= DWC3_EP_PENDING_CLEAR_STALL;  in __dwc3_gadget_ep_set_halt()
2212 				dwc->clear_stall_protocol = dep->number;  in __dwc3_gadget_ep_set_halt()
2221 			dev_err(dwc->dev, "failed to clear STALL on %s\n",  in __dwc3_gadget_ep_set_halt()
2222 					dep->name);  in __dwc3_gadget_ep_set_halt()
2226 		dep->flags &= ~(DWC3_EP_STALL | DWC3_EP_WEDGE);  in __dwc3_gadget_ep_set_halt()
2228 		if ((dep->flags & DWC3_EP_DELAY_START) &&  in __dwc3_gadget_ep_set_halt()
2229 		    !usb_endpoint_xfer_isoc(dep->endpoint.desc))  in __dwc3_gadget_ep_set_halt()
2232 		dep->flags &= ~DWC3_EP_DELAY_START;  in __dwc3_gadget_ep_set_halt()
2241 	struct dwc3			*dwc = dep->dwc;  in dwc3_gadget_ep_set_halt()
2247 	spin_lock_irqsave(&dwc->lock, flags);  in dwc3_gadget_ep_set_halt()
2249 	spin_unlock_irqrestore(&dwc->lock, flags);  in dwc3_gadget_ep_set_halt()
2257 	struct dwc3			*dwc = dep->dwc;  in dwc3_gadget_ep_set_wedge()
2261 	spin_lock_irqsave(&dwc->lock, flags);  in dwc3_gadget_ep_set_wedge()
2262 	dep->flags |= DWC3_EP_WEDGE;  in dwc3_gadget_ep_set_wedge()
2264 	if (dep->number == 0 || dep->number == 1)  in dwc3_gadget_ep_set_wedge()
2268 	spin_unlock_irqrestore(&dwc->lock, flags);  in dwc3_gadget_ep_set_wedge()
2273 /* -------------------------------------------------------------------------- */
2283 	.disable	= dwc3_gadget_ep0_disable,
2294 	.disable	= dwc3_gadget_ep_disable,
2303 /* -------------------------------------------------------------------------- */
2312 	reg = dwc3_readl(dwc->regs, DWC3_DEVTEN);  in dwc3_gadget_enable_linksts_evts()
2318 	dwc3_writel(dwc->regs, DWC3_DEVTEN, reg);  in dwc3_gadget_enable_linksts_evts()
2343 	reg = dwc3_readl(dwc->regs, DWC3_DSTS);  in __dwc3_gadget_wakeup()
2356 		return -EINVAL;  in __dwc3_gadget_wakeup()
2364 		dev_err(dwc->dev, "failed to put link in Recovery\n");  in __dwc3_gadget_wakeup()
2372 		reg = dwc3_readl(dwc->regs, DWC3_DCTL);  in __dwc3_gadget_wakeup()
2374 		dwc3_writel(dwc->regs, DWC3_DCTL, reg);  in __dwc3_gadget_wakeup()
2387 	while (retries--) {  in __dwc3_gadget_wakeup()
2388 		reg = dwc3_readl(dwc->regs, DWC3_DSTS);  in __dwc3_gadget_wakeup()
2396 		dev_err(dwc->dev, "failed to send remote wakeup\n");  in __dwc3_gadget_wakeup()
2397 		return -EINVAL;  in __dwc3_gadget_wakeup()
2409 	if (!dwc->wakeup_configured) {  in dwc3_gadget_wakeup()
2410 		dev_err(dwc->dev, "remote wakeup not configured\n");  in dwc3_gadget_wakeup()
2411 		return -EINVAL;  in dwc3_gadget_wakeup()
2414 	spin_lock_irqsave(&dwc->lock, flags);  in dwc3_gadget_wakeup()
2415 	if (!dwc->gadget->wakeup_armed) {  in dwc3_gadget_wakeup()
2416 		dev_err(dwc->dev, "not armed for remote wakeup\n");  in dwc3_gadget_wakeup()
2417 		spin_unlock_irqrestore(&dwc->lock, flags);  in dwc3_gadget_wakeup()
2418 		return -EINVAL;  in dwc3_gadget_wakeup()
2422 	spin_unlock_irqrestore(&dwc->lock, flags);  in dwc3_gadget_wakeup()
2436 	if (!dwc->wakeup_configured) {  in dwc3_gadget_func_wakeup()
2437 		dev_err(dwc->dev, "remote wakeup not configured\n");  in dwc3_gadget_func_wakeup()
2438 		return -EINVAL;  in dwc3_gadget_func_wakeup()
2441 	spin_lock_irqsave(&dwc->lock, flags);  in dwc3_gadget_func_wakeup()
2450 			spin_unlock_irqrestore(&dwc->lock, flags);  in dwc3_gadget_func_wakeup()
2451 			return -EINVAL;  in dwc3_gadget_func_wakeup()
2454 		dwc->suspended = false;  in dwc3_gadget_func_wakeup()
2455 		dwc->link_state = DWC3_LINK_STATE_U0;  in dwc3_gadget_func_wakeup()
2462 		dev_err(dwc->dev, "function remote wakeup failed, ret:%d\n", ret);  in dwc3_gadget_func_wakeup()
2464 	spin_unlock_irqrestore(&dwc->lock, flags);  in dwc3_gadget_func_wakeup()
2474 	spin_lock_irqsave(&dwc->lock, flags);  in dwc3_gadget_set_remote_wakeup()
2475 	dwc->wakeup_configured = !!set;  in dwc3_gadget_set_remote_wakeup()
2476 	spin_unlock_irqrestore(&dwc->lock, flags);  in dwc3_gadget_set_remote_wakeup()
2487 	spin_lock_irqsave(&dwc->lock, flags);  in dwc3_gadget_set_selfpowered()
2488 	g->is_selfpowered = !!is_selfpowered;  in dwc3_gadget_set_selfpowered()
2489 	spin_unlock_irqrestore(&dwc->lock, flags);  in dwc3_gadget_set_selfpowered()
2498 	for (epnum = 2; epnum < dwc->num_eps; epnum++) {  in dwc3_stop_active_transfers()
2501 		dep = dwc->eps[epnum];  in dwc3_stop_active_transfers()
2505 		dwc3_remove_requests(dwc, dep, -ESHUTDOWN);  in dwc3_stop_active_transfers()
2511 	enum usb_ssp_rate	ssp_rate = dwc->gadget_ssp_rate;  in __dwc3_gadget_set_ssp_rate()
2515 		ssp_rate = dwc->max_ssp_rate;  in __dwc3_gadget_set_ssp_rate()
2517 	reg = dwc3_readl(dwc->regs, DWC3_DCFG);  in __dwc3_gadget_set_ssp_rate()
2523 	else if (dwc->max_ssp_rate != USB_SSP_GEN_1x2)  in __dwc3_gadget_set_ssp_rate()
2527 	    dwc->max_ssp_rate != USB_SSP_GEN_2x1)  in __dwc3_gadget_set_ssp_rate()
2530 	dwc3_writel(dwc->regs, DWC3_DCFG, reg);  in __dwc3_gadget_set_ssp_rate()
2538 	speed = dwc->gadget_max_speed;  in __dwc3_gadget_set_speed()
2539 	if (speed == USB_SPEED_UNKNOWN || speed > dwc->maximum_speed)  in __dwc3_gadget_set_speed()
2540 		speed = dwc->maximum_speed;  in __dwc3_gadget_set_speed()
2548 	reg = dwc3_readl(dwc->regs, DWC3_DCFG);  in __dwc3_gadget_set_speed()
2554 	 * bit if we try to force the IP to USB2-only mode.  in __dwc3_gadget_set_speed()
2565 	    !dwc->dis_metastability_quirk) {  in __dwc3_gadget_set_speed()
2585 			dev_err(dwc->dev, "invalid speed (%d)\n", speed);  in __dwc3_gadget_set_speed()
2599 	dwc3_writel(dwc->regs, DWC3_DCFG, reg);  in __dwc3_gadget_set_speed()
2607 	if (pm_runtime_suspended(dwc->dev))  in dwc3_gadget_run_stop()
2610 	reg = dwc3_readl(dwc->regs, DWC3_DCTL);  in dwc3_gadget_run_stop()
2622 		dwc->pullups_connected = true;  in dwc3_gadget_run_stop()
2626 		dwc->pullups_connected = false;  in dwc3_gadget_run_stop()
2633 		reg = dwc3_readl(dwc->regs, DWC3_DSTS);  in dwc3_gadget_run_stop()
2635 	} while (--timeout && !(!is_on ^ !reg));  in dwc3_gadget_run_stop()
2638 		return -ETIMEDOUT;  in dwc3_gadget_run_stop()
2652 	spin_lock_irqsave(&dwc->lock, flags);  in dwc3_gadget_soft_disconnect()
2653 	if (!dwc->pullups_connected) {  in dwc3_gadget_soft_disconnect()
2654 		spin_unlock_irqrestore(&dwc->lock, flags);  in dwc3_gadget_soft_disconnect()
2658 	dwc->connected = false;  in dwc3_gadget_soft_disconnect()
2664 	if (dwc->delayed_status)  in dwc3_gadget_soft_disconnect()
2669 	 * Section 4.1.8 Table 4-7, it states that for a device-initiated  in dwc3_gadget_soft_disconnect()
2675 	spin_unlock_irqrestore(&dwc->lock, flags);  in dwc3_gadget_soft_disconnect()
2684 	if (dwc->ep0state != EP0_SETUP_PHASE) {  in dwc3_gadget_soft_disconnect()
2685 		reinit_completion(&dwc->ep0_in_setup);  in dwc3_gadget_soft_disconnect()
2687 		ret = wait_for_completion_timeout(&dwc->ep0_in_setup,  in dwc3_gadget_soft_disconnect()
2690 			dev_warn(dwc->dev, "wait for SETUP phase timed out\n");  in dwc3_gadget_soft_disconnect()
2691 			spin_lock_irqsave(&dwc->lock, flags);  in dwc3_gadget_soft_disconnect()
2693 			spin_unlock_irqrestore(&dwc->lock, flags);  in dwc3_gadget_soft_disconnect()
2712 	spin_lock_irqsave(&dwc->lock, flags);  in dwc3_gadget_soft_disconnect()
2714 	spin_unlock_irqrestore(&dwc->lock, flags);  in dwc3_gadget_soft_disconnect()
2726 	 * device-initiated disconnect requires a core soft reset  in dwc3_gadget_soft_connect()
2745 	dwc->softconnect = is_on;  in dwc3_gadget_pullup()
2753 		pm_runtime_barrier(dwc->dev);  in dwc3_gadget_pullup()
2754 		if (pm_runtime_suspended(dwc->dev))  in dwc3_gadget_pullup()
2763 	ret = pm_runtime_get_sync(dwc->dev);  in dwc3_gadget_pullup()
2765 		pm_runtime_put(dwc->dev);  in dwc3_gadget_pullup()
2767 			pm_runtime_set_suspended(dwc->dev);  in dwc3_gadget_pullup()
2771 	if (dwc->pullups_connected == is_on) {  in dwc3_gadget_pullup()
2772 		pm_runtime_put(dwc->dev);  in dwc3_gadget_pullup()
2776 	synchronize_irq(dwc->irq_gadget);  in dwc3_gadget_pullup()
2783 	pm_runtime_put(dwc->dev);  in dwc3_gadget_pullup()
2804 	/* On 2.30a and above this bit enables U3/L2-L1 Suspend Events */  in dwc3_gadget_enable_irq()
2808 	dwc3_writel(dwc->regs, DWC3_DEVTEN, reg);  in dwc3_gadget_enable_irq()
2814 	dwc3_writel(dwc->regs, DWC3_DEVTEN, 0x00);  in dwc3_gadget_disable_irq()
2821  * dwc3_gadget_setup_nump - calculate and initialize NUMP field of %DWC3_DCFG
2834  * RxFIFO Size = (RAM2_DEPTH * MDWIDTH / 8) - 24 - 16;
2848 	ram2_depth = DWC3_GHWPARAMS7_RAM2_DEPTH(dwc->hwparams.hwparams7);  in dwc3_gadget_setup_nump()
2851 	nump = ((ram2_depth * mdwidth / 8) - 24 - 16) / 1024;  in dwc3_gadget_setup_nump()
2855 	reg = dwc3_readl(dwc->regs, DWC3_DCFG);  in dwc3_gadget_setup_nump()
2858 	dwc3_writel(dwc->regs, DWC3_DCFG, reg);  in dwc3_gadget_setup_nump()
2868 	 * Use IMOD if enabled via dwc->imod_interval. Otherwise, if  in __dwc3_gadget_start()
2869 	 * the core supports IMOD, disable it.  in __dwc3_gadget_start()
2871 	if (dwc->imod_interval) {  in __dwc3_gadget_start()
2872 		dwc3_writel(dwc->regs, DWC3_DEV_IMOD(0), dwc->imod_interval);  in __dwc3_gadget_start()
2873 		dwc3_writel(dwc->regs, DWC3_GEVNTCOUNT(0), DWC3_GEVNTCOUNT_EHB);  in __dwc3_gadget_start()
2875 		dwc3_writel(dwc->regs, DWC3_DEV_IMOD(0), 0);  in __dwc3_gadget_start()
2885 	reg = dwc3_readl(dwc->regs, DWC3_GRXTHRCFG);  in __dwc3_gadget_start()
2891 	dwc3_writel(dwc->regs, DWC3_GRXTHRCFG, reg);  in __dwc3_gadget_start()
2902 	reg = dwc3_readl(dwc->regs, DWC3_DCFG);  in __dwc3_gadget_start()
2904 	dwc3_writel(dwc->regs, DWC3_DCFG, reg);  in __dwc3_gadget_start()
2907 	if (DWC3_MST_CAPABLE(&dwc->hwparams)) {  in __dwc3_gadget_start()
2908 		reg = dwc3_readl(dwc->regs, DWC3_DCFG1);  in __dwc3_gadget_start()
2910 		dwc3_writel(dwc->regs, DWC3_DCFG1, reg);  in __dwc3_gadget_start()
2916 	dep = dwc->eps[0];  in __dwc3_gadget_start()
2917 	dep->flags = 0;  in __dwc3_gadget_start()
2920 		dev_err(dwc->dev, "failed to enable %s\n", dep->name);  in __dwc3_gadget_start()
2924 	dep = dwc->eps[1];  in __dwc3_gadget_start()
2925 	dep->flags = 0;  in __dwc3_gadget_start()
2928 		dev_err(dwc->dev, "failed to enable %s\n", dep->name);  in __dwc3_gadget_start()
2933 	dwc->ep0state = EP0_SETUP_PHASE;  in __dwc3_gadget_start()
2934 	dwc->ep0_bounced = false;  in __dwc3_gadget_start()
2935 	dwc->link_state = DWC3_LINK_STATE_SS_DIS;  in __dwc3_gadget_start()
2936 	dwc->delayed_status = false;  in __dwc3_gadget_start()
2944 	__dwc3_gadget_ep_disable(dwc->eps[0]);  in __dwc3_gadget_start()
2958 	irq = dwc->irq_gadget;  in dwc3_gadget_start()
2960 			IRQF_SHARED, "dwc3", dwc->ev_buf);  in dwc3_gadget_start()
2962 		dev_err(dwc->dev, "failed to request irq #%d --> %d\n",  in dwc3_gadget_start()
2967 	spin_lock_irqsave(&dwc->lock, flags);  in dwc3_gadget_start()
2968 	dwc->gadget_driver	= driver;  in dwc3_gadget_start()
2969 	spin_unlock_irqrestore(&dwc->lock, flags);  in dwc3_gadget_start()
2977 	__dwc3_gadget_ep_disable(dwc->eps[0]);  in __dwc3_gadget_stop()
2978 	__dwc3_gadget_ep_disable(dwc->eps[1]);  in __dwc3_gadget_stop()
2986 	spin_lock_irqsave(&dwc->lock, flags);  in dwc3_gadget_stop()
2987 	dwc->gadget_driver	= NULL;  in dwc3_gadget_stop()
2988 	dwc->max_cfg_eps = 0;  in dwc3_gadget_stop()
2989 	spin_unlock_irqrestore(&dwc->lock, flags);  in dwc3_gadget_stop()
2991 	free_irq(dwc->irq_gadget, dwc->ev_buf);  in dwc3_gadget_stop()
3001 	params->besl_baseline = USB_DEFAULT_BESL_UNSPECIFIED;  in dwc3_gadget_config_params()
3002 	params->besl_deep = USB_DEFAULT_BESL_UNSPECIFIED;  in dwc3_gadget_config_params()
3005 	if (!dwc->dis_enblslpm_quirk) {  in dwc3_gadget_config_params()
3015 		params->besl_baseline = 1;  in dwc3_gadget_config_params()
3016 		if (dwc->is_utmi_l1_suspend)  in dwc3_gadget_config_params()
3017 			params->besl_deep =  in dwc3_gadget_config_params()
3018 				clamp_t(u8, dwc->hird_threshold, 2, 15);  in dwc3_gadget_config_params()
3022 	if (dwc->dis_u1_entry_quirk)  in dwc3_gadget_config_params()
3023 		params->bU1devExitLat = 0;  in dwc3_gadget_config_params()
3025 		params->bU1devExitLat = DWC3_DEFAULT_U1_DEV_EXIT_LAT;  in dwc3_gadget_config_params()
3028 	if (dwc->dis_u2_entry_quirk)  in dwc3_gadget_config_params()
3029 		params->bU2DevExitLat = 0;  in dwc3_gadget_config_params()
3031 		params->bU2DevExitLat =  in dwc3_gadget_config_params()
3041 	spin_lock_irqsave(&dwc->lock, flags);  in dwc3_gadget_set_speed()
3042 	dwc->gadget_max_speed = speed;  in dwc3_gadget_set_speed()
3043 	spin_unlock_irqrestore(&dwc->lock, flags);  in dwc3_gadget_set_speed()
3052 	spin_lock_irqsave(&dwc->lock, flags);  in dwc3_gadget_set_ssp_rate()
3053 	dwc->gadget_max_speed = USB_SPEED_SUPER_PLUS;  in dwc3_gadget_set_ssp_rate()
3054 	dwc->gadget_ssp_rate = rate;  in dwc3_gadget_set_ssp_rate()
3055 	spin_unlock_irqrestore(&dwc->lock, flags);  in dwc3_gadget_set_ssp_rate()
3064 	if (dwc->usb2_phy)  in dwc3_gadget_vbus_draw()
3065 		return usb_phy_set_power(dwc->usb2_phy, mA);  in dwc3_gadget_vbus_draw()
3067 	if (!dwc->usb_psy)  in dwc3_gadget_vbus_draw()
3068 		return -EOPNOTSUPP;  in dwc3_gadget_vbus_draw()
3071 	ret = power_supply_set_property(dwc->usb_psy, POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT, &val);  in dwc3_gadget_vbus_draw()
3077  * dwc3_gadget_check_config - ensure dwc3 can support the USB configuration
3094 	if (!dwc->do_fifo_resize)  in dwc3_gadget_check_config()
3097 	list_for_each_entry(ep, &g->ep_list, ep_list) {  in dwc3_gadget_check_config()
3099 		if (ep->claimed && (ep->address & USB_DIR_IN))  in dwc3_gadget_check_config()
3103 	if (ep_num <= dwc->max_cfg_eps)  in dwc3_gadget_check_config()
3107 	dwc->max_cfg_eps = ep_num;  in dwc3_gadget_check_config()
3109 	fifo_size = dwc3_gadget_calc_tx_fifo_size(dwc, dwc->max_cfg_eps);  in dwc3_gadget_check_config()
3111 	fifo_size += dwc->max_cfg_eps;  in dwc3_gadget_check_config()
3114 	ram1_depth = DWC3_RAM1_DEPTH(dwc->hwparams.hwparams7);  in dwc3_gadget_check_config()
3116 		return -ENOMEM;  in dwc3_gadget_check_config()
3126 	spin_lock_irqsave(&dwc->lock, flags);  in dwc3_gadget_async_callbacks()
3127 	dwc->async_callbacks = enable;  in dwc3_gadget_async_callbacks()
3128 	spin_unlock_irqrestore(&dwc->lock, flags);  in dwc3_gadget_async_callbacks()
3137 	.pullup			= dwc3_gadget_pullup,
3148 /* -------------------------------------------------------------------------- */
3152 	struct dwc3 *dwc = dep->dwc;  in dwc3_gadget_init_control_endpoint()
3154 	usb_ep_set_maxpacket_limit(&dep->endpoint, 512);  in dwc3_gadget_init_control_endpoint()
3155 	dep->endpoint.maxburst = 1;  in dwc3_gadget_init_control_endpoint()
3156 	dep->endpoint.ops = &dwc3_gadget_ep0_ops;  in dwc3_gadget_init_control_endpoint()
3157 	if (!dep->direction)  in dwc3_gadget_init_control_endpoint()
3158 		dwc->gadget->ep0 = &dep->endpoint;  in dwc3_gadget_init_control_endpoint()
3160 	dep->endpoint.caps.type_control = true;  in dwc3_gadget_init_control_endpoint()
3167 	struct dwc3 *dwc = dep->dwc;  in dwc3_gadget_init_in_endpoint()
3177 	size = dwc3_readl(dwc->regs, DWC3_GTXFIFOSIZ(dep->number >> 1));  in dwc3_gadget_init_in_endpoint()
3188 	 * maxpacket = mdwidth * (fifo_size - 1);  in dwc3_gadget_init_in_endpoint()
3192 	 * maxpacket = mdwidth * ((fifo_size - 1) - 1) - mdwidth;  in dwc3_gadget_init_in_endpoint()
3195 		maxpacket = mdwidth * (size - 1);  in dwc3_gadget_init_in_endpoint()
3197 		maxpacket = mdwidth * ((size - 1) - 1) - mdwidth;  in dwc3_gadget_init_in_endpoint()
3201 	usb_ep_set_maxpacket_limit(&dep->endpoint, size);  in dwc3_gadget_init_in_endpoint()
3203 	dep->endpoint.max_streams = 16;  in dwc3_gadget_init_in_endpoint()
3204 	dep->endpoint.ops = &dwc3_gadget_ep_ops;  in dwc3_gadget_init_in_endpoint()
3205 	list_add_tail(&dep->endpoint.ep_list,  in dwc3_gadget_init_in_endpoint()
3206 			&dwc->gadget->ep_list);  in dwc3_gadget_init_in_endpoint()
3207 	dep->endpoint.caps.type_iso = true;  in dwc3_gadget_init_in_endpoint()
3208 	dep->endpoint.caps.type_bulk = true;  in dwc3_gadget_init_in_endpoint()
3209 	dep->endpoint.caps.type_int = true;  in dwc3_gadget_init_in_endpoint()
3216 	struct dwc3 *dwc = dep->dwc;  in dwc3_gadget_init_out_endpoint()
3226 	size = dwc3_readl(dwc->regs, DWC3_GRXFIFOSIZ(0));  in dwc3_gadget_init_out_endpoint()
3243 	size -= (3 * 8) + 16;  in dwc3_gadget_init_out_endpoint()
3249 	usb_ep_set_maxpacket_limit(&dep->endpoint, size);  in dwc3_gadget_init_out_endpoint()
3250 	dep->endpoint.max_streams = 16;  in dwc3_gadget_init_out_endpoint()
3251 	dep->endpoint.ops = &dwc3_gadget_ep_ops;  in dwc3_gadget_init_out_endpoint()
3252 	list_add_tail(&dep->endpoint.ep_list,  in dwc3_gadget_init_out_endpoint()
3253 			&dwc->gadget->ep_list);  in dwc3_gadget_init_out_endpoint()
3254 	dep->endpoint.caps.type_iso = true;  in dwc3_gadget_init_out_endpoint()
3255 	dep->endpoint.caps.type_bulk = true;  in dwc3_gadget_init_out_endpoint()
3256 	dep->endpoint.caps.type_int = true;  in dwc3_gadget_init_out_endpoint()
3270 		return -ENOMEM;  in dwc3_gadget_init_endpoint()
3272 	dep->dwc = dwc;  in dwc3_gadget_init_endpoint()
3273 	dep->number = epnum;  in dwc3_gadget_init_endpoint()
3274 	dep->direction = direction;  in dwc3_gadget_init_endpoint()
3275 	dep->regs = dwc->regs + DWC3_DEP_BASE(epnum);  in dwc3_gadget_init_endpoint()
3276 	dwc->eps[epnum] = dep;  in dwc3_gadget_init_endpoint()
3277 	dep->combo_num = 0;  in dwc3_gadget_init_endpoint()
3278 	dep->start_cmd_status = 0;  in dwc3_gadget_init_endpoint()
3280 	snprintf(dep->name, sizeof(dep->name), "ep%u%s", num,  in dwc3_gadget_init_endpoint()
3283 	dep->endpoint.name = dep->name;  in dwc3_gadget_init_endpoint()
3285 	if (!(dep->number > 1)) {  in dwc3_gadget_init_endpoint()
3286 		dep->endpoint.desc = &dwc3_gadget_ep0_desc;  in dwc3_gadget_init_endpoint()
3287 		dep->endpoint.comp_desc = NULL;  in dwc3_gadget_init_endpoint()
3300 	dep->endpoint.caps.dir_in = direction;  in dwc3_gadget_init_endpoint()
3301 	dep->endpoint.caps.dir_out = !direction;  in dwc3_gadget_init_endpoint()
3303 	INIT_LIST_HEAD(&dep->pending_list);  in dwc3_gadget_init_endpoint()
3304 	INIT_LIST_HEAD(&dep->started_list);  in dwc3_gadget_init_endpoint()
3305 	INIT_LIST_HEAD(&dep->cancelled_list);  in dwc3_gadget_init_endpoint()
3316 	INIT_LIST_HEAD(&dwc->gadget->ep_list);  in dwc3_gadget_init_endpoints()
3335 		dep = dwc->eps[epnum];  in dwc3_gadget_free_endpoints()
3340 		 * bi-directional USB endpoint 0.  in dwc3_gadget_free_endpoints()
3349 			list_del(&dep->endpoint.ep_list);  in dwc3_gadget_free_endpoints()
3357 /* -------------------------------------------------------------------------- */
3368 	req->num_trbs--;  in dwc3_gadget_ep_reclaim_completed_trb()
3380 	if (chain && (trb->ctrl & DWC3_TRB_CTRL_HWO))  in dwc3_gadget_ep_reclaim_completed_trb()
3381 		trb->ctrl &= ~DWC3_TRB_CTRL_HWO;  in dwc3_gadget_ep_reclaim_completed_trb()
3385 	 * have the Isoc-First type. Track and report its interval frame number.  in dwc3_gadget_ep_reclaim_completed_trb()
3387 	if (usb_endpoint_xfer_isoc(dep->endpoint.desc) &&  in dwc3_gadget_ep_reclaim_completed_trb()
3388 	    (trb->ctrl & DWC3_TRBCTL_ISOCHRONOUS_FIRST)) {  in dwc3_gadget_ep_reclaim_completed_trb()
3391 		frame_number = DWC3_TRB_CTRL_GET_SID_SOFN(trb->ctrl);  in dwc3_gadget_ep_reclaim_completed_trb()
3392 		frame_number &= ~(dep->interval - 1);  in dwc3_gadget_ep_reclaim_completed_trb()
3393 		req->request.frame_number = frame_number;  in dwc3_gadget_ep_reclaim_completed_trb()
3399 	 * TRB. Don't add it to req->remaining calculation.  in dwc3_gadget_ep_reclaim_completed_trb()
3401 	if (trb->bpl == lower_32_bits(dep->dwc->bounce_addr) &&  in dwc3_gadget_ep_reclaim_completed_trb()
3402 	    trb->bph == upper_32_bits(dep->dwc->bounce_addr)) {  in dwc3_gadget_ep_reclaim_completed_trb()
3403 		trb->ctrl &= ~DWC3_TRB_CTRL_HWO;  in dwc3_gadget_ep_reclaim_completed_trb()
3407 	count = trb->size & DWC3_TRB_SIZE_MASK;  in dwc3_gadget_ep_reclaim_completed_trb()
3408 	req->remaining += count;  in dwc3_gadget_ep_reclaim_completed_trb()
3410 	if ((trb->ctrl & DWC3_TRB_CTRL_HWO) && status != -ESHUTDOWN)  in dwc3_gadget_ep_reclaim_completed_trb()
3413 	if (event->status & DEPEVT_STATUS_SHORT && !chain)  in dwc3_gadget_ep_reclaim_completed_trb()
3416 	if ((trb->ctrl & DWC3_TRB_CTRL_ISP_IMI) &&  in dwc3_gadget_ep_reclaim_completed_trb()
3417 	    DWC3_TRB_SIZE_TRBSTS(trb->size) == DWC3_TRBSTS_MISSED_ISOC)  in dwc3_gadget_ep_reclaim_completed_trb()
3420 	if ((trb->ctrl & DWC3_TRB_CTRL_IOC) ||  in dwc3_gadget_ep_reclaim_completed_trb()
3421 	    (trb->ctrl & DWC3_TRB_CTRL_LST))  in dwc3_gadget_ep_reclaim_completed_trb()
3431 	struct dwc3_trb *trb = &dep->trb_pool[dep->trb_dequeue];  in dwc3_gadget_ep_reclaim_trb_sg()
3432 	struct scatterlist *sg = req->sg;  in dwc3_gadget_ep_reclaim_trb_sg()
3434 	unsigned int num_queued = req->num_queued_sgs;  in dwc3_gadget_ep_reclaim_trb_sg()
3439 		trb = &dep->trb_pool[dep->trb_dequeue];  in dwc3_gadget_ep_reclaim_trb_sg()
3441 		req->sg = sg_next(s);  in dwc3_gadget_ep_reclaim_trb_sg()
3442 		req->num_queued_sgs--;  in dwc3_gadget_ep_reclaim_trb_sg()
3457 	struct dwc3_trb *trb = &dep->trb_pool[dep->trb_dequeue];  in dwc3_gadget_ep_reclaim_trb_linear()
3465 	return req->num_pending_sgs == 0 && req->num_queued_sgs == 0;  in dwc3_gadget_ep_request_completed()
3475 	if (req->request.num_mapped_sgs)  in dwc3_gadget_ep_cleanup_completed_request()
3482 	req->request.actual = req->request.length - req->remaining;  in dwc3_gadget_ep_cleanup_completed_request()
3487 	if (req->needs_extra_trb) {  in dwc3_gadget_ep_cleanup_completed_request()
3490 		req->needs_extra_trb = false;  in dwc3_gadget_ep_cleanup_completed_request()
3499 	if (req->request.no_interrupt) {  in dwc3_gadget_ep_cleanup_completed_request()
3502 		trb = dwc3_ep_prev_trb(dep, dep->trb_dequeue);  in dwc3_gadget_ep_cleanup_completed_request()
3503 		switch (DWC3_TRB_SIZE_TRBSTS(trb->size)) {  in dwc3_gadget_ep_cleanup_completed_request()
3506 			request_status = -EXDEV;  in dwc3_gadget_ep_cleanup_completed_request()
3532 	while (!list_empty(&dep->started_list)) {  in dwc3_gadget_ep_cleanup_completed_requests()
3535 		req = next_request(&dep->started_list);  in dwc3_gadget_ep_cleanup_completed_requests()
3544 		if (!dep->endpoint.desc)  in dwc3_gadget_ep_cleanup_completed_requests()
3552 	struct dwc3		*dwc = dep->dwc;  in dwc3_gadget_ep_should_continue()
3554 	if (!dep->endpoint.desc || !dwc->pullups_connected ||  in dwc3_gadget_ep_should_continue()
3555 	    !dwc->connected)  in dwc3_gadget_ep_should_continue()
3558 	if (!list_empty(&dep->pending_list))  in dwc3_gadget_ep_should_continue()
3565 	req = next_request(&dep->started_list);  in dwc3_gadget_ep_should_continue()
3575 	dep->frame_number = event->parameters;  in dwc3_gadget_endpoint_frame_from_event()
3581 	struct dwc3		*dwc = dep->dwc;  in dwc3_gadget_endpoint_trbs_complete()
3586 	if (dep->flags & DWC3_EP_END_TRANSFER_PENDING)  in dwc3_gadget_endpoint_trbs_complete()
3589 	if (!dep->endpoint.desc)  in dwc3_gadget_endpoint_trbs_complete()
3592 	if (usb_endpoint_xfer_isoc(dep->endpoint.desc) &&  in dwc3_gadget_endpoint_trbs_complete()
3593 		list_empty(&dep->started_list) &&  in dwc3_gadget_endpoint_trbs_complete()
3594 		(list_empty(&dep->pending_list) || status == -EXDEV))  in dwc3_gadget_endpoint_trbs_complete()
3602 	 * WORKAROUND: This is the 2nd half of U1/U2 -> U0 workaround.  in dwc3_gadget_endpoint_trbs_complete()
3610 			dep = dwc->eps[i];  in dwc3_gadget_endpoint_trbs_complete()
3612 			if (!(dep->flags & DWC3_EP_ENABLED))  in dwc3_gadget_endpoint_trbs_complete()
3615 			if (!list_empty(&dep->started_list))  in dwc3_gadget_endpoint_trbs_complete()
3619 		reg = dwc3_readl(dwc->regs, DWC3_DCTL);  in dwc3_gadget_endpoint_trbs_complete()
3620 		reg |= dwc->u1u2;  in dwc3_gadget_endpoint_trbs_complete()
3621 		dwc3_writel(dwc->regs, DWC3_DCTL, reg);  in dwc3_gadget_endpoint_trbs_complete()
3623 		dwc->u1u2 = 0;  in dwc3_gadget_endpoint_trbs_complete()
3634 	if (!dep->endpoint.desc)  in dwc3_gadget_endpoint_transfer_in_progress()
3637 	if (usb_endpoint_xfer_isoc(dep->endpoint.desc))  in dwc3_gadget_endpoint_transfer_in_progress()
3640 	if (event->status & DEPEVT_STATUS_BUSERR)  in dwc3_gadget_endpoint_transfer_in_progress()
3641 		status = -ECONNRESET;  in dwc3_gadget_endpoint_transfer_in_progress()
3643 	if (event->status & DEPEVT_STATUS_MISSED_ISOC)  in dwc3_gadget_endpoint_transfer_in_progress()
3644 		status = -EXDEV;  in dwc3_gadget_endpoint_transfer_in_progress()
3654 	dep->flags &= ~DWC3_EP_TRANSFER_STARTED;  in dwc3_gadget_endpoint_transfer_complete()
3656 	if (event->status & DEPEVT_STATUS_BUSERR)  in dwc3_gadget_endpoint_transfer_complete()
3657 		status = -ECONNRESET;  in dwc3_gadget_endpoint_transfer_complete()
3660 		dep->flags &= ~DWC3_EP_WAIT_TRANSFER_COMPLETE;  in dwc3_gadget_endpoint_transfer_complete()
3676 	if (dep->flags & DWC3_EP_END_TRANSFER_PENDING)  in dwc3_gadget_endpoint_transfer_not_ready()
3685 	u8 cmd = DEPEVT_PARAMETER_CMD(event->parameters);  in dwc3_gadget_endpoint_command_complete()
3695 	if (dep->stream_capable)  in dwc3_gadget_endpoint_command_complete()
3696 		dep->flags |= DWC3_EP_IGNORE_NEXT_NOSTREAM;  in dwc3_gadget_endpoint_command_complete()
3698 	dep->flags &= ~DWC3_EP_END_TRANSFER_PENDING;  in dwc3_gadget_endpoint_command_complete()
3699 	dep->flags &= ~DWC3_EP_TRANSFER_STARTED;  in dwc3_gadget_endpoint_command_complete()
3702 	if (dep->flags & DWC3_EP_PENDING_CLEAR_STALL) {  in dwc3_gadget_endpoint_command_complete()
3703 		struct dwc3 *dwc = dep->dwc;  in dwc3_gadget_endpoint_command_complete()
3705 		dep->flags &= ~DWC3_EP_PENDING_CLEAR_STALL;  in dwc3_gadget_endpoint_command_complete()
3707 			struct usb_ep *ep0 = &dwc->eps[0]->endpoint;  in dwc3_gadget_endpoint_command_complete()
3709 			dev_err(dwc->dev, "failed to clear STALL on %s\n", dep->name);  in dwc3_gadget_endpoint_command_complete()
3710 			if (dwc->delayed_status)  in dwc3_gadget_endpoint_command_complete()
3715 		dep->flags &= ~(DWC3_EP_STALL | DWC3_EP_WEDGE);  in dwc3_gadget_endpoint_command_complete()
3716 		if (dwc->clear_stall_protocol == dep->number)  in dwc3_gadget_endpoint_command_complete()
3720 	if ((dep->flags & DWC3_EP_DELAY_START) &&  in dwc3_gadget_endpoint_command_complete()
3721 	    !usb_endpoint_xfer_isoc(dep->endpoint.desc))  in dwc3_gadget_endpoint_command_complete()
3724 	dep->flags &= ~DWC3_EP_DELAY_START;  in dwc3_gadget_endpoint_command_complete()
3730 	struct dwc3 *dwc = dep->dwc;  in dwc3_gadget_endpoint_stream_event()
3732 	if (event->status == DEPEVT_STREAMEVT_FOUND) {  in dwc3_gadget_endpoint_stream_event()
3733 		dep->flags |= DWC3_EP_FIRST_STREAM_PRIMED;  in dwc3_gadget_endpoint_stream_event()
3738 	switch (event->parameters) {  in dwc3_gadget_endpoint_stream_event()
3747 		if (dep->flags & DWC3_EP_FORCE_RESTART_STREAM) {  in dwc3_gadget_endpoint_stream_event()
3748 			if (dep->flags & DWC3_EP_FIRST_STREAM_PRIMED)  in dwc3_gadget_endpoint_stream_event()
3749 				dep->flags &= ~DWC3_EP_FORCE_RESTART_STREAM;  in dwc3_gadget_endpoint_stream_event()
3751 				dep->flags |= DWC3_EP_FIRST_STREAM_PRIMED;  in dwc3_gadget_endpoint_stream_event()
3756 		if ((dep->flags & DWC3_EP_IGNORE_NEXT_NOSTREAM) ||  in dwc3_gadget_endpoint_stream_event()
3757 		    !(dep->flags & DWC3_EP_FORCE_RESTART_STREAM) ||  in dwc3_gadget_endpoint_stream_event()
3758 		    (!DWC3_MST_CAPABLE(&dwc->hwparams) &&  in dwc3_gadget_endpoint_stream_event()
3759 		     !(dep->flags & DWC3_EP_WAIT_TRANSFER_COMPLETE)))  in dwc3_gadget_endpoint_stream_event()
3779 			dwc3_send_gadget_generic_command(dwc, cmd, dep->number);  in dwc3_gadget_endpoint_stream_event()
3781 			dep->flags |= DWC3_EP_DELAY_START;  in dwc3_gadget_endpoint_stream_event()
3789 	dep->flags &= ~DWC3_EP_IGNORE_NEXT_NOSTREAM;  in dwc3_gadget_endpoint_stream_event()
3796 	u8			epnum = event->endpoint_number;  in dwc3_endpoint_interrupt()
3798 	dep = dwc->eps[epnum];  in dwc3_endpoint_interrupt()
3800 	if (!(dep->flags & DWC3_EP_ENABLED)) {  in dwc3_endpoint_interrupt()
3801 		if ((epnum > 1) && !(dep->flags & DWC3_EP_TRANSFER_STARTED))  in dwc3_endpoint_interrupt()
3805 		if ((event->endpoint_event != DWC3_DEPEVT_EPCMDCMPLT) &&  in dwc3_endpoint_interrupt()
3806 			!(epnum <= 1 && event->endpoint_event == DWC3_DEPEVT_XFERCOMPLETE))  in dwc3_endpoint_interrupt()
3815 	switch (event->endpoint_event) {  in dwc3_endpoint_interrupt()
3834 		dev_err(dwc->dev, "unknown endpoint event %d\n", event->endpoint_event);  in dwc3_endpoint_interrupt()
3841 	if (dwc->async_callbacks && dwc->gadget_driver->disconnect) {  in dwc3_disconnect_gadget()
3842 		spin_unlock(&dwc->lock);  in dwc3_disconnect_gadget()
3843 		dwc->gadget_driver->disconnect(dwc->gadget);  in dwc3_disconnect_gadget()
3844 		spin_lock(&dwc->lock);  in dwc3_disconnect_gadget()
3850 	if (dwc->async_callbacks && dwc->gadget_driver->suspend) {  in dwc3_suspend_gadget()
3851 		spin_unlock(&dwc->lock);  in dwc3_suspend_gadget()
3852 		dwc->gadget_driver->suspend(dwc->gadget);  in dwc3_suspend_gadget()
3853 		spin_lock(&dwc->lock);  in dwc3_suspend_gadget()
3859 	if (dwc->async_callbacks && dwc->gadget_driver->resume) {  in dwc3_resume_gadget()
3860 		spin_unlock(&dwc->lock);  in dwc3_resume_gadget()
3861 		dwc->gadget_driver->resume(dwc->gadget);  in dwc3_resume_gadget()
3862 		spin_lock(&dwc->lock);  in dwc3_resume_gadget()
3868 	if (!dwc->gadget_driver)  in dwc3_reset_gadget()
3871 	if (dwc->async_callbacks && dwc->gadget->speed != USB_SPEED_UNKNOWN) {  in dwc3_reset_gadget()
3872 		spin_unlock(&dwc->lock);  in dwc3_reset_gadget()
3873 		usb_gadget_udc_reset(dwc->gadget, dwc->gadget_driver);  in dwc3_reset_gadget()
3874 		spin_lock(&dwc->lock);  in dwc3_reset_gadget()
3881 	struct dwc3 *dwc = dep->dwc;  in dwc3_stop_active_transfer()
3889 	if (dep->number <= 1 && dwc->ep0state != EP0_DATA_PHASE)  in dwc3_stop_active_transfer()
3892 	if (interrupt && (dep->flags & DWC3_EP_DELAY_STOP))  in dwc3_stop_active_transfer()
3895 	if (!(dep->flags & DWC3_EP_TRANSFER_STARTED) ||  in dwc3_stop_active_transfer()
3896 	    (dep->flags & DWC3_EP_END_TRANSFER_PENDING))  in dwc3_stop_active_transfer()
3906 	if (dwc->ep0state != EP0_SETUP_PHASE && !dwc->delayed_status) {  in dwc3_stop_active_transfer()
3907 		dep->flags |= DWC3_EP_DELAY_STOP;  in dwc3_stop_active_transfer()
3953 		dep = dwc->eps[epnum];  in dwc3_clear_stall_all_ep()
3957 		if (!(dep->flags & DWC3_EP_STALL))  in dwc3_clear_stall_all_ep()
3960 		dep->flags &= ~DWC3_EP_STALL;  in dwc3_clear_stall_all_ep()
3971 	dwc->suspended = false;  in dwc3_gadget_disconnect_interrupt()
3975 	reg = dwc3_readl(dwc->regs, DWC3_DCTL);  in dwc3_gadget_disconnect_interrupt()
3980 	dwc->connected = false;  in dwc3_gadget_disconnect_interrupt()
3984 	dwc->gadget->speed = USB_SPEED_UNKNOWN;  in dwc3_gadget_disconnect_interrupt()
3985 	dwc->setup_packet_pending = false;  in dwc3_gadget_disconnect_interrupt()
3986 	dwc->gadget->wakeup_armed = false;  in dwc3_gadget_disconnect_interrupt()
3988 	usb_gadget_set_state(dwc->gadget, USB_STATE_NOTATTACHED);  in dwc3_gadget_disconnect_interrupt()
3995 	 * interrupt to set dwc->connected to FALSE.  in dwc3_gadget_disconnect_interrupt()
3997 	pm_request_idle(dwc->dev);  in dwc3_gadget_disconnect_interrupt()
4004 	dwc->suspended = false;  in dwc3_gadget_reset_interrupt()
4008 	 * drivers to stop any active transfers through ep disable.  in dwc3_gadget_reset_interrupt()
4009 	 * However, for functions which defer ep disable, such as mass  in dwc3_gadget_reset_interrupt()
4013 	dwc->connected = false;  in dwc3_gadget_reset_interrupt()
4042 		if (dwc->setup_packet_pending)  in dwc3_gadget_reset_interrupt()
4057 	 * Section 4.1.2 Table 4-2, it states that during a USB reset, the SW  in dwc3_gadget_reset_interrupt()
4062 	dwc->connected = true;  in dwc3_gadget_reset_interrupt()
4064 	reg = dwc3_readl(dwc->regs, DWC3_DCTL);  in dwc3_gadget_reset_interrupt()
4067 	dwc->test_mode = false;  in dwc3_gadget_reset_interrupt()
4068 	dwc->gadget->wakeup_armed = false;  in dwc3_gadget_reset_interrupt()
4073 	reg = dwc3_readl(dwc->regs, DWC3_DCFG);  in dwc3_gadget_reset_interrupt()
4075 	dwc3_writel(dwc->regs, DWC3_DCFG, reg);  in dwc3_gadget_reset_interrupt()
4086 	if (!dwc->softconnect)  in dwc3_gadget_conndone_interrupt()
4089 	reg = dwc3_readl(dwc->regs, DWC3_DSTS);  in dwc3_gadget_conndone_interrupt()
4091 	dwc->speed = speed;  in dwc3_gadget_conndone_interrupt()
4096 	dwc->gadget->ssp_rate = USB_SSP_GEN_UNKNOWN;  in dwc3_gadget_conndone_interrupt()
4110 		dwc->gadget->ep0->maxpacket = 512;  in dwc3_gadget_conndone_interrupt()
4111 		dwc->gadget->speed = USB_SPEED_SUPER_PLUS;  in dwc3_gadget_conndone_interrupt()
4114 			dwc->gadget->ssp_rate = USB_SSP_GEN_2x2;  in dwc3_gadget_conndone_interrupt()
4116 			dwc->gadget->ssp_rate = USB_SSP_GEN_2x1;  in dwc3_gadget_conndone_interrupt()
4136 		dwc->gadget->ep0->maxpacket = 512;  in dwc3_gadget_conndone_interrupt()
4137 		dwc->gadget->speed = USB_SPEED_SUPER;  in dwc3_gadget_conndone_interrupt()
4140 			dwc->gadget->speed = USB_SPEED_SUPER_PLUS;  in dwc3_gadget_conndone_interrupt()
4141 			dwc->gadget->ssp_rate = USB_SSP_GEN_1x2;  in dwc3_gadget_conndone_interrupt()
4146 		dwc->gadget->ep0->maxpacket = 64;  in dwc3_gadget_conndone_interrupt()
4147 		dwc->gadget->speed = USB_SPEED_HIGH;  in dwc3_gadget_conndone_interrupt()
4151 		dwc->gadget->ep0->maxpacket = 64;  in dwc3_gadget_conndone_interrupt()
4152 		dwc->gadget->speed = USB_SPEED_FULL;  in dwc3_gadget_conndone_interrupt()
4156 	dwc->eps[1]->endpoint.maxpacket = dwc->gadget->ep0->maxpacket;  in dwc3_gadget_conndone_interrupt()
4161 	    !dwc->usb2_gadget_lpm_disable &&  in dwc3_gadget_conndone_interrupt()
4164 		reg = dwc3_readl(dwc->regs, DWC3_DCFG);  in dwc3_gadget_conndone_interrupt()
4166 		dwc3_writel(dwc->regs, DWC3_DCFG, reg);  in dwc3_gadget_conndone_interrupt()
4168 		reg = dwc3_readl(dwc->regs, DWC3_DCTL);  in dwc3_gadget_conndone_interrupt()
4171 		reg |= DWC3_DCTL_HIRD_THRES(dwc->hird_threshold |  in dwc3_gadget_conndone_interrupt()
4172 					    (dwc->is_utmi_l1_suspend << 4));  in dwc3_gadget_conndone_interrupt()
4180 		WARN_ONCE(DWC3_VER_IS_PRIOR(DWC3, 240A) && dwc->has_lpm_erratum,  in dwc3_gadget_conndone_interrupt()
4183 		if (dwc->has_lpm_erratum && !DWC3_VER_IS_PRIOR(DWC3, 240A))  in dwc3_gadget_conndone_interrupt()
4184 			reg |= DWC3_DCTL_NYET_THRES(dwc->lpm_nyet_threshold);  in dwc3_gadget_conndone_interrupt()
4188 		if (dwc->usb2_gadget_lpm_disable) {  in dwc3_gadget_conndone_interrupt()
4189 			reg = dwc3_readl(dwc->regs, DWC3_DCFG);  in dwc3_gadget_conndone_interrupt()
4191 			dwc3_writel(dwc->regs, DWC3_DCFG, reg);  in dwc3_gadget_conndone_interrupt()
4194 		reg = dwc3_readl(dwc->regs, DWC3_DCTL);  in dwc3_gadget_conndone_interrupt()
4199 	dep = dwc->eps[0];  in dwc3_gadget_conndone_interrupt()
4202 		dev_err(dwc->dev, "failed to enable %s\n", dep->name);  in dwc3_gadget_conndone_interrupt()
4206 	dep = dwc->eps[1];  in dwc3_gadget_conndone_interrupt()
4209 		dev_err(dwc->dev, "failed to enable %s\n", dep->name);  in dwc3_gadget_conndone_interrupt()
4224 	dwc->suspended = false;  in dwc3_gadget_wakeup_interrupt()
4231 	if (dwc->async_callbacks && dwc->gadget_driver->resume) {  in dwc3_gadget_wakeup_interrupt()
4232 		spin_unlock(&dwc->lock);  in dwc3_gadget_wakeup_interrupt()
4233 		dwc->gadget_driver->resume(dwc->gadget);  in dwc3_gadget_wakeup_interrupt()
4234 		spin_lock(&dwc->lock);  in dwc3_gadget_wakeup_interrupt()
4237 	dwc->link_state = evtinfo & DWC3_LINK_STATE_MASK;  in dwc3_gadget_wakeup_interrupt()
4249 	 * host-initiated U3 exit.  in dwc3_gadget_linksts_change_interrupt()
4260 	 * STAR#9000570034 RTL: SS Resume event generated in non-Hibernation  in dwc3_gadget_linksts_change_interrupt()
4263 	pwropt = DWC3_GHWPARAMS1_EN_PWROPT(dwc->hwparams.hwparams1);  in dwc3_gadget_linksts_change_interrupt()
4266 		if ((dwc->link_state == DWC3_LINK_STATE_U3) &&  in dwc3_gadget_linksts_change_interrupt()
4278 	 * suggested workaround is to disable DCTL[12:9] bits if we're  in dwc3_gadget_linksts_change_interrupt()
4287 	 * STAR#9000446952: RTL: Device SS : if U1/U2 ->U0 takes >128us  in dwc3_gadget_linksts_change_interrupt()
4295 			switch (dwc->link_state) {  in dwc3_gadget_linksts_change_interrupt()
4298 				reg = dwc3_readl(dwc->regs, DWC3_DCTL);  in dwc3_gadget_linksts_change_interrupt()
4304 				if (!dwc->u1u2)  in dwc3_gadget_linksts_change_interrupt()
4305 					dwc->u1u2 = reg & u1u2;  in dwc3_gadget_linksts_change_interrupt()
4320 		if (dwc->gadget->wakeup_armed) {  in dwc3_gadget_linksts_change_interrupt()
4323 			dwc->suspended = false;  in dwc3_gadget_linksts_change_interrupt()
4327 		if (dwc->speed == USB_SPEED_SUPER)  in dwc3_gadget_linksts_change_interrupt()
4342 	dwc->link_state = next;  in dwc3_gadget_linksts_change_interrupt()
4350 	if (!dwc->suspended && next == DWC3_LINK_STATE_U3) {  in dwc3_gadget_suspend_interrupt()
4351 		dwc->suspended = true;  in dwc3_gadget_suspend_interrupt()
4355 	dwc->link_state = next;  in dwc3_gadget_suspend_interrupt()
4361 	switch (event->type) {  in dwc3_gadget_interrupt()
4372 		dwc3_gadget_wakeup_interrupt(dwc, event->event_info);  in dwc3_gadget_interrupt()
4375 		dev_WARN_ONCE(dwc->dev, true, "unexpected hibernation event\n");  in dwc3_gadget_interrupt()
4378 		dwc3_gadget_linksts_change_interrupt(dwc, event->event_info);  in dwc3_gadget_interrupt()
4383 			dwc3_gadget_suspend_interrupt(dwc, event->event_info);  in dwc3_gadget_interrupt()
4391 		dev_WARN(dwc->dev, "UNKNOWN IRQ %d\n", event->type);  in dwc3_gadget_interrupt()
4398 	trace_dwc3_event(event->raw, dwc);  in dwc3_process_event_entry()
4400 	if (!event->type.is_devspec)  in dwc3_process_event_entry()
4401 		dwc3_endpoint_interrupt(dwc, &event->depevt);  in dwc3_process_event_entry()
4402 	else if (event->type.type == DWC3_EVENT_TYPE_DEV)  in dwc3_process_event_entry()
4403 		dwc3_gadget_interrupt(dwc, &event->devt);  in dwc3_process_event_entry()
4405 		dev_err(dwc->dev, "UNKNOWN IRQ type %d\n", event->raw);  in dwc3_process_event_entry()
4410 	struct dwc3 *dwc = evt->dwc;  in dwc3_process_event_buf()
4414 	left = evt->count;  in dwc3_process_event_buf()
4416 	if (!(evt->flags & DWC3_EVENT_PENDING))  in dwc3_process_event_buf()
4422 		event.raw = *(u32 *) (evt->cache + evt->lpos);  in dwc3_process_event_buf()
4435 		evt->lpos = (evt->lpos + 4) % evt->length;  in dwc3_process_event_buf()
4436 		left -= 4;  in dwc3_process_event_buf()
4439 	evt->count = 0;  in dwc3_process_event_buf()
4443 	dwc3_writel(dwc->regs, DWC3_GEVNTSIZ(0),  in dwc3_process_event_buf()
4444 		    DWC3_GEVNTSIZ_SIZE(evt->length));  in dwc3_process_event_buf()
4446 	if (dwc->imod_interval) {  in dwc3_process_event_buf()
4447 		dwc3_writel(dwc->regs, DWC3_GEVNTCOUNT(0), DWC3_GEVNTCOUNT_EHB);  in dwc3_process_event_buf()
4448 		dwc3_writel(dwc->regs, DWC3_DEV_IMOD(0), dwc->imod_interval);  in dwc3_process_event_buf()
4452 	evt->flags &= ~DWC3_EVENT_PENDING;  in dwc3_process_event_buf()
4460 	struct dwc3 *dwc = evt->dwc;  in dwc3_thread_interrupt()
4465 	spin_lock_irqsave(&dwc->lock, flags);  in dwc3_thread_interrupt()
4467 	spin_unlock_irqrestore(&dwc->lock, flags);  in dwc3_thread_interrupt()
4475 	struct dwc3 *dwc = evt->dwc;  in dwc3_check_event_buf()
4479 	if (pm_runtime_suspended(dwc->dev)) {  in dwc3_check_event_buf()
4480 		dwc->pending_events = true;  in dwc3_check_event_buf()
4486 		pm_runtime_get(dwc->dev);  in dwc3_check_event_buf()
4487 		disable_irq_nosync(dwc->irq_gadget);  in dwc3_check_event_buf()
4492 	 * With PCIe legacy interrupt, test shows that top-half irq handler can  in dwc3_check_event_buf()
4493 	 * be called again after HW interrupt deassertion. Check if bottom-half  in dwc3_check_event_buf()
4497 	if (evt->flags & DWC3_EVENT_PENDING)  in dwc3_check_event_buf()
4500 	count = dwc3_readl(dwc->regs, DWC3_GEVNTCOUNT(0));  in dwc3_check_event_buf()
4505 	evt->count = count;  in dwc3_check_event_buf()
4506 	evt->flags |= DWC3_EVENT_PENDING;  in dwc3_check_event_buf()
4509 	dwc3_writel(dwc->regs, DWC3_GEVNTSIZ(0),  in dwc3_check_event_buf()
4510 		    DWC3_GEVNTSIZ_INTMASK | DWC3_GEVNTSIZ_SIZE(evt->length));  in dwc3_check_event_buf()
4512 	amount = min(count, evt->length - evt->lpos);  in dwc3_check_event_buf()
4513 	memcpy(evt->cache + evt->lpos, evt->buf + evt->lpos, amount);  in dwc3_check_event_buf()
4516 		memcpy(evt->cache, evt->buf, count - amount);  in dwc3_check_event_buf()
4518 	dwc3_writel(dwc->regs, DWC3_GEVNTCOUNT(0), count);  in dwc3_check_event_buf()
4532 	struct platform_device *dwc3_pdev = to_platform_device(dwc->dev);  in dwc3_gadget_get_irq()
4539 	if (irq == -EPROBE_DEFER)  in dwc3_gadget_get_irq()
4546 	if (irq == -EPROBE_DEFER)  in dwc3_gadget_get_irq()
4563  * dwc3_gadget_init - initializes gadget related registers
4580 	dwc->irq_gadget = irq;  in dwc3_gadget_init()
4582 	dwc->ep0_trb = dma_alloc_coherent(dwc->sysdev,  in dwc3_gadget_init()
4583 					  sizeof(*dwc->ep0_trb) * 2,  in dwc3_gadget_init()
4584 					  &dwc->ep0_trb_addr, GFP_KERNEL);  in dwc3_gadget_init()
4585 	if (!dwc->ep0_trb) {  in dwc3_gadget_init()
4586 		dev_err(dwc->dev, "failed to allocate ep0 trb\n");  in dwc3_gadget_init()
4587 		ret = -ENOMEM;  in dwc3_gadget_init()
4591 	dwc->setup_buf = kzalloc(DWC3_EP0_SETUP_SIZE, GFP_KERNEL);  in dwc3_gadget_init()
4592 	if (!dwc->setup_buf) {  in dwc3_gadget_init()
4593 		ret = -ENOMEM;  in dwc3_gadget_init()
4597 	dwc->bounce = dma_alloc_coherent(dwc->sysdev, DWC3_BOUNCE_SIZE,  in dwc3_gadget_init()
4598 			&dwc->bounce_addr, GFP_KERNEL);  in dwc3_gadget_init()
4599 	if (!dwc->bounce) {  in dwc3_gadget_init()
4600 		ret = -ENOMEM;  in dwc3_gadget_init()
4604 	init_completion(&dwc->ep0_in_setup);  in dwc3_gadget_init()
4605 	dwc->gadget = kzalloc(sizeof(struct usb_gadget), GFP_KERNEL);  in dwc3_gadget_init()
4606 	if (!dwc->gadget) {  in dwc3_gadget_init()
4607 		ret = -ENOMEM;  in dwc3_gadget_init()
4612 	usb_initialize_gadget(dwc->dev, dwc->gadget, dwc_gadget_release);  in dwc3_gadget_init()
4613 	dev				= &dwc->gadget->dev;  in dwc3_gadget_init()
4614 	dev->platform_data		= dwc;  in dwc3_gadget_init()
4615 	dwc->gadget->ops		= &dwc3_gadget_ops;  in dwc3_gadget_init()
4616 	dwc->gadget->speed		= USB_SPEED_UNKNOWN;  in dwc3_gadget_init()
4617 	dwc->gadget->ssp_rate		= USB_SSP_GEN_UNKNOWN;  in dwc3_gadget_init()
4618 	dwc->gadget->sg_supported	= true;  in dwc3_gadget_init()
4619 	dwc->gadget->name		= "dwc3-gadget";  in dwc3_gadget_init()
4620 	dwc->gadget->lpm_capable	= !dwc->usb2_gadget_lpm_disable;  in dwc3_gadget_init()
4621 	dwc->gadget->wakeup_capable	= true;  in dwc3_gadget_init()
4640 	    !dwc->dis_metastability_quirk)  in dwc3_gadget_init()
4641 		dev_info(dwc->dev, "changing max_speed on rev %08x\n",  in dwc3_gadget_init()
4642 				dwc->revision);  in dwc3_gadget_init()
4644 	dwc->gadget->max_speed		= dwc->maximum_speed;  in dwc3_gadget_init()
4645 	dwc->gadget->max_ssp_rate	= dwc->max_ssp_rate;  in dwc3_gadget_init()
4652 	ret = dwc3_gadget_init_endpoints(dwc, dwc->num_eps);  in dwc3_gadget_init()
4656 	ret = usb_add_gadget(dwc->gadget);  in dwc3_gadget_init()
4658 		dev_err(dwc->dev, "failed to add gadget\n");  in dwc3_gadget_init()
4662 	if (DWC3_IP_IS(DWC32) && dwc->maximum_speed == USB_SPEED_SUPER_PLUS)  in dwc3_gadget_init()
4663 		dwc3_gadget_set_ssp_rate(dwc->gadget, dwc->max_ssp_rate);  in dwc3_gadget_init()
4665 		dwc3_gadget_set_speed(dwc->gadget, dwc->maximum_speed);  in dwc3_gadget_init()
4672 	usb_put_gadget(dwc->gadget);  in dwc3_gadget_init()
4673 	dwc->gadget = NULL;  in dwc3_gadget_init()
4675 	dma_free_coherent(dwc->sysdev, DWC3_BOUNCE_SIZE, dwc->bounce,  in dwc3_gadget_init()
4676 			dwc->bounce_addr);  in dwc3_gadget_init()
4679 	kfree(dwc->setup_buf);  in dwc3_gadget_init()
4682 	dma_free_coherent(dwc->sysdev, sizeof(*dwc->ep0_trb) * 2,  in dwc3_gadget_init()
4683 			dwc->ep0_trb, dwc->ep0_trb_addr);  in dwc3_gadget_init()
4689 /* -------------------------------------------------------------------------- */
4693 	if (!dwc->gadget)  in dwc3_gadget_exit()
4696 	usb_del_gadget(dwc->gadget);  in dwc3_gadget_exit()
4698 	usb_put_gadget(dwc->gadget);  in dwc3_gadget_exit()
4699 	dma_free_coherent(dwc->sysdev, DWC3_BOUNCE_SIZE, dwc->bounce,  in dwc3_gadget_exit()
4700 			  dwc->bounce_addr);  in dwc3_gadget_exit()
4701 	kfree(dwc->setup_buf);  in dwc3_gadget_exit()
4702 	dma_free_coherent(dwc->sysdev, sizeof(*dwc->ep0_trb) * 2,  in dwc3_gadget_exit()
4703 			  dwc->ep0_trb, dwc->ep0_trb_addr);  in dwc3_gadget_exit()
4715 	spin_lock_irqsave(&dwc->lock, flags);  in dwc3_gadget_suspend()
4716 	if (dwc->gadget_driver)  in dwc3_gadget_suspend()
4718 	spin_unlock_irqrestore(&dwc->lock, flags);  in dwc3_gadget_suspend()
4728 	if (dwc->softconnect)  in dwc3_gadget_suspend()
4736 	if (!dwc->gadget_driver || !dwc->softconnect)  in dwc3_gadget_resume()
4744 	if (dwc->pending_events) {  in dwc3_gadget_process_pending_events()
4745 		dwc3_interrupt(dwc->irq_gadget, dwc->ev_buf);  in dwc3_gadget_process_pending_events()
4746 		dwc3_thread_interrupt(dwc->irq_gadget, dwc->ev_buf);  in dwc3_gadget_process_pending_events()
4747 		pm_runtime_put(dwc->dev);  in dwc3_gadget_process_pending_events()
4748 		dwc->pending_events = false;  in dwc3_gadget_process_pending_events()
4749 		enable_irq(dwc->irq_gadget);  in dwc3_gadget_process_pending_events()