[mirror_ubuntu-hirsute-kernel.git] / drivers / usb / mtu3 / mtu3_gadget.c

// SPDX-License-Identifier: GPL-2.0
/*
 * mtu3_gadget.c - MediaTek usb3 DRD peripheral support
 *
 * Copyright (C) 2016 MediaTek Inc.
 *
 * Author: Chunfeng Yun <chunfeng.yun@mediatek.com>
 */

#include "mtu3.h"
#include "mtu3_trace.h"

void mtu3_req_complete(struct mtu3_ep *mep,
		     struct usb_request *req, int status)
__releases(mep->mtu->lock)
__acquires(mep->mtu->lock)
{
	struct mtu3_request *mreq = to_mtu3_request(req);
	struct mtu3 *mtu = mreq->mtu;

	list_del(&mreq->list);
	if (req->status == -EINPROGRESS)
		req->status = status;

	trace_mtu3_req_complete(mreq);
	spin_unlock(&mtu->lock);

	/* ep0 makes use of PIO, needn't unmap it */
	if (mep->epnum)
		usb_gadget_unmap_request(&mtu->g, req, mep->is_in);

	dev_dbg(mtu->dev, "%s complete req: %p, sts %d, %d/%d\n",
		mep->name, req, req->status, req->actual, req->length);

	usb_gadget_giveback_request(&mep->ep, req);
	spin_lock(&mtu->lock);
}

static void nuke(struct mtu3_ep *mep, const int status)
{
	struct mtu3_request *mreq = NULL;

	if (list_empty(&mep->req_list))
		return;

	dev_dbg(mep->mtu->dev, "abort %s's req: sts %d\n", mep->name, status);

	/* exclude EP0 */
	if (mep->epnum)
		mtu3_qmu_flush(mep);

	while (!list_empty(&mep->req_list)) {
		mreq = list_first_entry(&mep->req_list,
					struct mtu3_request, list);
		mtu3_req_complete(mep, &mreq->request, status);
	}
}

static int mtu3_ep_enable(struct mtu3_ep *mep)
{
	const struct usb_endpoint_descriptor *desc;
	const struct usb_ss_ep_comp_descriptor *comp_desc;
	struct mtu3 *mtu = mep->mtu;
	u32 interval = 0;
	u32 mult = 0;
	u32 burst = 0;
	int ret;

	desc = mep->desc;
	comp_desc = mep->comp_desc;
	mep->type = usb_endpoint_type(desc);
	mep->maxp = usb_endpoint_maxp(desc);

	switch (mtu->g.speed) {
	case USB_SPEED_SUPER:
	case USB_SPEED_SUPER_PLUS:
		if (usb_endpoint_xfer_int(desc) ||
				usb_endpoint_xfer_isoc(desc)) {
			interval = desc->bInterval;
			interval = clamp_val(interval, 1, 16) - 1;
			if (usb_endpoint_xfer_isoc(desc) && comp_desc)
				mult = comp_desc->bmAttributes;
		}
		if (comp_desc)
			burst = comp_desc->bMaxBurst;

		break;
	case USB_SPEED_HIGH:
		if (usb_endpoint_xfer_isoc(desc) ||
				usb_endpoint_xfer_int(desc)) {
			interval = desc->bInterval;
			interval = clamp_val(interval, 1, 16) - 1;
			mult = usb_endpoint_maxp_mult(desc) - 1;
		}
		break;
	default:
		break; /*others are ignored */
	}

	dev_dbg(mtu->dev, "%s maxp:%d, interval:%d, burst:%d, mult:%d\n",
		__func__, mep->maxp, interval, burst, mult);

	mep->ep.maxpacket = mep->maxp;
	mep->ep.desc = desc;
	mep->ep.comp_desc = comp_desc;

	/* slot mainly affects bulk/isoc transfer, so ignore int */
	mep->slot = usb_endpoint_xfer_int(desc) ? 0 : mtu->slot;

	ret = mtu3_config_ep(mtu, mep, interval, burst, mult);
	if (ret < 0)
		return ret;

	ret = mtu3_gpd_ring_alloc(mep);
	if (ret < 0) {
		mtu3_deconfig_ep(mtu, mep);
		return ret;
	}

	mtu3_qmu_start(mep);

	return 0;
}

static int mtu3_ep_disable(struct mtu3_ep *mep)
{
	struct mtu3 *mtu = mep->mtu;

	mtu3_qmu_stop(mep);

	/* abort all pending requests */
	nuke(mep, -ESHUTDOWN);
	mtu3_deconfig_ep(mtu, mep);
	mtu3_gpd_ring_free(mep);

	mep->desc = NULL;
	mep->ep.desc = NULL;
	mep->comp_desc = NULL;
	mep->type = 0;
	mep->flags = 0;

	return 0;
}

static int mtu3_gadget_ep_enable(struct usb_ep *ep,
		const struct usb_endpoint_descriptor *desc)
{
	struct mtu3_ep *mep;
	struct mtu3 *mtu;
	unsigned long flags;
	int ret = -EINVAL;

	if (!ep || !desc || desc->bDescriptorType != USB_DT_ENDPOINT) {
		pr_debug("%s invalid parameters\n", __func__);
		return -EINVAL;
	}

	if (!desc->wMaxPacketSize) {
		pr_debug("%s missing wMaxPacketSize\n", __func__);
		return -EINVAL;
	}
	mep = to_mtu3_ep(ep);
	mtu = mep->mtu;

	/* check ep number and direction against endpoint */
	if (usb_endpoint_num(desc) != mep->epnum)
		return -EINVAL;

	if (!!usb_endpoint_dir_in(desc) ^ !!mep->is_in)
		return -EINVAL;

	dev_dbg(mtu->dev, "%s %s\n", __func__, ep->name);

	if (mep->flags & MTU3_EP_ENABLED) {
		dev_WARN_ONCE(mtu->dev, true, "%s is already enabled\n",
				mep->name);
		return 0;
	}

	spin_lock_irqsave(&mtu->lock, flags);
	mep->desc = desc;
	mep->comp_desc = ep->comp_desc;

	ret = mtu3_ep_enable(mep);
	if (ret)
		goto error;

	mep->flags = MTU3_EP_ENABLED;
	mtu->active_ep++;

error:
	spin_unlock_irqrestore(&mtu->lock, flags);

	dev_dbg(mtu->dev, "%s active_ep=%d\n", __func__, mtu->active_ep);
	trace_mtu3_gadget_ep_enable(mep);

	return ret;
}

static int mtu3_gadget_ep_disable(struct usb_ep *ep)
{
	struct mtu3_ep *mep = to_mtu3_ep(ep);
	struct mtu3 *mtu = mep->mtu;
	unsigned long flags;

	dev_dbg(mtu->dev, "%s %s\n", __func__, mep->name);
	trace_mtu3_gadget_ep_disable(mep);

	if (!(mep->flags & MTU3_EP_ENABLED)) {
		dev_warn(mtu->dev, "%s is already disabled\n", mep->name);
		return 0;
	}

	spin_lock_irqsave(&mtu->lock, flags);
	mtu3_ep_disable(mep);
	mep->flags = 0;
	mtu->active_ep--;
	spin_unlock_irqrestore(&(mtu->lock), flags);

	dev_dbg(mtu->dev, "%s active_ep=%d, mtu3 is_active=%d\n",
		__func__, mtu->active_ep, mtu->is_active);

	return 0;
}

struct usb_request *mtu3_alloc_request(struct usb_ep *ep, gfp_t gfp_flags)
{
	struct mtu3_ep *mep = to_mtu3_ep(ep);
	struct mtu3_request *mreq;

	mreq = kzalloc(sizeof(*mreq), gfp_flags);
	if (!mreq)
		return NULL;

	mreq->request.dma = DMA_ADDR_INVALID;
	mreq->epnum = mep->epnum;
	mreq->mep = mep;
	trace_mtu3_alloc_request(mreq);

	return &mreq->request;
}

void mtu3_free_request(struct usb_ep *ep, struct usb_request *req)
{
	struct mtu3_request *mreq = to_mtu3_request(req);

	trace_mtu3_free_request(mreq);
	kfree(mreq);
}

static int mtu3_gadget_queue(struct usb_ep *ep,
		struct usb_request *req, gfp_t gfp_flags)
{
	struct mtu3_ep *mep = to_mtu3_ep(ep);
	struct mtu3_request *mreq = to_mtu3_request(req);
	struct mtu3 *mtu = mep->mtu;
	unsigned long flags;
	int ret = 0;

	if (!req->buf)
		return -ENODATA;

	if (mreq->mep != mep)
		return -EINVAL;

	dev_dbg(mtu->dev, "%s %s EP%d(%s), req=%p, maxp=%d, len#%d\n",
		__func__, mep->is_in ? "TX" : "RX", mreq->epnum, ep->name,
		mreq, ep->maxpacket, mreq->request.length);

	if (req->length > GPD_BUF_SIZE ||
	    (mtu->gen2cp && req->length > GPD_BUF_SIZE_EL)) {
		dev_warn(mtu->dev,
			"req length > supported MAX:%d requested:%d\n",
			mtu->gen2cp ? GPD_BUF_SIZE_EL : GPD_BUF_SIZE,
			req->length);
		return -EOPNOTSUPP;
	}

	/* don't queue if the ep is down */
	if (!mep->desc) {
		dev_dbg(mtu->dev, "req=%p queued to %s while it's disabled\n",
			req, ep->name);
		return -ESHUTDOWN;
	}

	mreq->mtu = mtu;
	mreq->request.actual = 0;
	mreq->request.status = -EINPROGRESS;

	ret = usb_gadget_map_request(&mtu->g, req, mep->is_in);
	if (ret) {
		dev_err(mtu->dev, "dma mapping failed\n");
		return ret;
	}

	spin_lock_irqsave(&mtu->lock, flags);

	if (mtu3_prepare_transfer(mep)) {
		ret = -EAGAIN;
		goto error;
	}

	list_add_tail(&mreq->list, &mep->req_list);
	mtu3_insert_gpd(mep, mreq);
	mtu3_qmu_resume(mep);

error:
	spin_unlock_irqrestore(&mtu->lock, flags);
	trace_mtu3_gadget_queue(mreq);

	return ret;
}

static int mtu3_gadget_dequeue(struct usb_ep *ep, struct usb_request *req)
{
	struct mtu3_ep *mep = to_mtu3_ep(ep);
	struct mtu3_request *mreq = to_mtu3_request(req);
	struct mtu3_request *r;
	struct mtu3 *mtu = mep->mtu;
	unsigned long flags;
	int ret = 0;

	if (mreq->mep != mep)
		return -EINVAL;

	dev_dbg(mtu->dev, "%s : req=%p\n", __func__, req);
	trace_mtu3_gadget_dequeue(mreq);

	spin_lock_irqsave(&mtu->lock, flags);

	list_for_each_entry(r, &mep->req_list, list) {
		if (r == mreq)
			break;
	}
	if (r != mreq) {
		dev_dbg(mtu->dev, "req=%p not queued to %s\n", req, ep->name);
		ret = -EINVAL;
		goto done;
	}

	mtu3_qmu_flush(mep);  /* REVISIT: set BPS ?? */
	mtu3_req_complete(mep, req, -ECONNRESET);
	mtu3_qmu_start(mep);

done:
	spin_unlock_irqrestore(&mtu->lock, flags);

	return ret;
}

/*
 * Set or clear the halt bit of an EP.
 * A halted EP won't TX/RX any data but will queue requests.
 */
static int mtu3_gadget_ep_set_halt(struct usb_ep *ep, int value)
{
	struct mtu3_ep *mep = to_mtu3_ep(ep);
	struct mtu3 *mtu = mep->mtu;
	struct mtu3_request *mreq;
	unsigned long flags;
	int ret = 0;

	dev_dbg(mtu->dev, "%s : %s...", __func__, ep->name);

	spin_lock_irqsave(&mtu->lock, flags);

	if (mep->type == USB_ENDPOINT_XFER_ISOC) {
		ret = -EINVAL;
		goto done;
	}

	mreq = next_request(mep);
	if (value) {
		/*
		 * If there is not request for TX-EP, QMU will not transfer
		 * data to TX-FIFO, so no need check whether TX-FIFO
		 * holds bytes or not here
		 */
		if (mreq) {
			dev_dbg(mtu->dev, "req in progress, cannot halt %s\n",
				ep->name);
			ret = -EAGAIN;
			goto done;
		}
	} else {
		mep->flags &= ~MTU3_EP_WEDGE;
	}

	dev_dbg(mtu->dev, "%s %s stall\n", ep->name, value ? "set" : "clear");

	mtu3_ep_stall_set(mep, value);

done:
	spin_unlock_irqrestore(&mtu->lock, flags);
	trace_mtu3_gadget_ep_set_halt(mep);

	return ret;
}

/* Sets the halt feature with the clear requests ignored */
static int mtu3_gadget_ep_set_wedge(struct usb_ep *ep)
{
	struct mtu3_ep *mep = to_mtu3_ep(ep);

	mep->flags |= MTU3_EP_WEDGE;

	return usb_ep_set_halt(ep);
}

static const struct usb_ep_ops mtu3_ep_ops = {
	.enable = mtu3_gadget_ep_enable,
	.disable = mtu3_gadget_ep_disable,
	.alloc_request = mtu3_alloc_request,
	.free_request = mtu3_free_request,
	.queue = mtu3_gadget_queue,
	.dequeue = mtu3_gadget_dequeue,
	.set_halt = mtu3_gadget_ep_set_halt,
	.set_wedge = mtu3_gadget_ep_set_wedge,
};

static int mtu3_gadget_get_frame(struct usb_gadget *gadget)
{
	struct mtu3 *mtu = gadget_to_mtu3(gadget);

	return (int)mtu3_readl(mtu->mac_base, U3D_USB20_FRAME_NUM);
}

static int mtu3_gadget_wakeup(struct usb_gadget *gadget)
{
	struct mtu3 *mtu = gadget_to_mtu3(gadget);
	unsigned long flags;

	dev_dbg(mtu->dev, "%s\n", __func__);

	/* remote wakeup feature is not enabled by host */
	if (!mtu->may_wakeup)
		return  -EOPNOTSUPP;

	spin_lock_irqsave(&mtu->lock, flags);
	if (mtu->g.speed >= USB_SPEED_SUPER) {
		mtu3_setbits(mtu->mac_base, U3D_LINK_POWER_CONTROL, UX_EXIT);
	} else {
		mtu3_setbits(mtu->mac_base, U3D_POWER_MANAGEMENT, RESUME);
		spin_unlock_irqrestore(&mtu->lock, flags);
		usleep_range(10000, 11000);
		spin_lock_irqsave(&mtu->lock, flags);
		mtu3_clrbits(mtu->mac_base, U3D_POWER_MANAGEMENT, RESUME);
	}
	spin_unlock_irqrestore(&mtu->lock, flags);
	return 0;
}

static int mtu3_gadget_set_self_powered(struct usb_gadget *gadget,
		int is_selfpowered)
{
	struct mtu3 *mtu = gadget_to_mtu3(gadget);

	mtu->is_self_powered = !!is_selfpowered;
	return 0;
}

static int mtu3_gadget_pullup(struct usb_gadget *gadget, int is_on)
{
	struct mtu3 *mtu = gadget_to_mtu3(gadget);
	unsigned long flags;

	dev_dbg(mtu->dev, "%s (%s) for %sactive device\n", __func__,
		is_on ? "on" : "off", mtu->is_active ? "" : "in");

	/* we'd rather not pullup unless the device is active. */
	spin_lock_irqsave(&mtu->lock, flags);

	is_on = !!is_on;
	if (!mtu->is_active) {
		/* save it for mtu3_start() to process the request */
		mtu->softconnect = is_on;
	} else if (is_on != mtu->softconnect) {
		mtu->softconnect = is_on;
		mtu3_dev_on_off(mtu, is_on);
	}

	spin_unlock_irqrestore(&mtu->lock, flags);

	return 0;
}

static int mtu3_gadget_start(struct usb_gadget *gadget,
		struct usb_gadget_driver *driver)
{
	struct mtu3 *mtu = gadget_to_mtu3(gadget);
	unsigned long flags;

	if (mtu->gadget_driver) {
		dev_err(mtu->dev, "%s is already bound to %s\n",
			mtu->g.name, mtu->gadget_driver->driver.name);
		return -EBUSY;
	}

	dev_dbg(mtu->dev, "bind driver %s\n", driver->function);

	spin_lock_irqsave(&mtu->lock, flags);

	mtu->softconnect = 0;
	mtu->gadget_driver = driver;

	if (mtu->ssusb->dr_mode == USB_DR_MODE_PERIPHERAL)
		mtu3_start(mtu);

	spin_unlock_irqrestore(&mtu->lock, flags);

	return 0;
}

static void stop_activity(struct mtu3 *mtu)
{
	struct usb_gadget_driver *driver = mtu->gadget_driver;
	int i;

	/* don't disconnect if it's not connected */
	if (mtu->g.speed == USB_SPEED_UNKNOWN)
		driver = NULL;
	else
		mtu->g.speed = USB_SPEED_UNKNOWN;

	/* deactivate the hardware */
	if (mtu->softconnect) {
		mtu->softconnect = 0;
		mtu3_dev_on_off(mtu, 0);
	}

	/*
	 * killing any outstanding requests will quiesce the driver;
	 * then report disconnect
	 */
	nuke(mtu->ep0, -ESHUTDOWN);
	for (i = 1; i < mtu->num_eps; i++) {
		nuke(mtu->in_eps + i, -ESHUTDOWN);
		nuke(mtu->out_eps + i, -ESHUTDOWN);
	}

	if (driver) {
		spin_unlock(&mtu->lock);
		driver->disconnect(&mtu->g);
		spin_lock(&mtu->lock);
	}
}

static int mtu3_gadget_stop(struct usb_gadget *g)
{
	struct mtu3 *mtu = gadget_to_mtu3(g);
	unsigned long flags;

	dev_dbg(mtu->dev, "%s\n", __func__);

	spin_lock_irqsave(&mtu->lock, flags);

	stop_activity(mtu);
	mtu->gadget_driver = NULL;

	if (mtu->ssusb->dr_mode == USB_DR_MODE_PERIPHERAL)
		mtu3_stop(mtu);

	spin_unlock_irqrestore(&mtu->lock, flags);

	synchronize_irq(mtu->irq);
	return 0;
}

static void
mtu3_gadget_set_speed(struct usb_gadget *g, enum usb_device_speed speed)
{
	struct mtu3 *mtu = gadget_to_mtu3(g);
	unsigned long flags;

	dev_dbg(mtu->dev, "%s %s\n", __func__, usb_speed_string(speed));

	spin_lock_irqsave(&mtu->lock, flags);
	mtu3_set_speed(mtu, speed);
	spin_unlock_irqrestore(&mtu->lock, flags);
}

static const struct usb_gadget_ops mtu3_gadget_ops = {
	.get_frame = mtu3_gadget_get_frame,
	.wakeup = mtu3_gadget_wakeup,
	.set_selfpowered = mtu3_gadget_set_self_powered,
	.pullup = mtu3_gadget_pullup,
	.udc_start = mtu3_gadget_start,
	.udc_stop = mtu3_gadget_stop,
	.udc_set_speed = mtu3_gadget_set_speed,
};

static void mtu3_state_reset(struct mtu3 *mtu)
{
	mtu->address = 0;
	mtu->ep0_state = MU3D_EP0_STATE_SETUP;
	mtu->may_wakeup = 0;
	mtu->u1_enable = 0;
	mtu->u2_enable = 0;
	mtu->delayed_status = false;
	mtu->test_mode = false;
}

static void init_hw_ep(struct mtu3 *mtu, struct mtu3_ep *mep,
		u32 epnum, u32 is_in)
{
	mep->epnum = epnum;
	mep->mtu = mtu;
	mep->is_in = is_in;

	INIT_LIST_HEAD(&mep->req_list);

	sprintf(mep->name, "ep%d%s", epnum,
		!epnum ? "" : (is_in ? "in" : "out"));

	mep->ep.name = mep->name;
	INIT_LIST_HEAD(&mep->ep.ep_list);

	/* initialize maxpacket as SS */
	if (!epnum) {
		usb_ep_set_maxpacket_limit(&mep->ep, 512);
		mep->ep.caps.type_control = true;
		mep->ep.ops = &mtu3_ep0_ops;
		mtu->g.ep0 = &mep->ep;
	} else {
		usb_ep_set_maxpacket_limit(&mep->ep, 1024);
		mep->ep.caps.type_iso = true;
		mep->ep.caps.type_bulk = true;
		mep->ep.caps.type_int = true;
		mep->ep.ops = &mtu3_ep_ops;
		list_add_tail(&mep->ep.ep_list, &mtu->g.ep_list);
	}

	dev_dbg(mtu->dev, "%s, name=%s, maxp=%d\n", __func__, mep->ep.name,
		 mep->ep.maxpacket);

	if (!epnum) {
		mep->ep.caps.dir_in = true;
		mep->ep.caps.dir_out = true;
	} else if (is_in) {
		mep->ep.caps.dir_in = true;
	} else {
		mep->ep.caps.dir_out = true;
	}
}

static void mtu3_gadget_init_eps(struct mtu3 *mtu)
{
	u8 epnum;

	/* initialize endpoint list just once */
	INIT_LIST_HEAD(&(mtu->g.ep_list));

	dev_dbg(mtu->dev, "%s num_eps(1 for a pair of tx&rx ep)=%d\n",
		__func__, mtu->num_eps);

	init_hw_ep(mtu, mtu->ep0, 0, 0);
	for (epnum = 1; epnum < mtu->num_eps; epnum++) {
		init_hw_ep(mtu, mtu->in_eps + epnum, epnum, 1);
		init_hw_ep(mtu, mtu->out_eps + epnum, epnum, 0);
	}
}

int mtu3_gadget_setup(struct mtu3 *mtu)
{
	mtu->g.ops = &mtu3_gadget_ops;
	mtu->g.max_speed = mtu->max_speed;
	mtu->g.speed = USB_SPEED_UNKNOWN;
	mtu->g.sg_supported = 0;
	mtu->g.name = MTU3_DRIVER_NAME;
	mtu->is_active = 0;
	mtu->delayed_status = false;

	mtu3_gadget_init_eps(mtu);

	return usb_add_gadget_udc(mtu->dev, &mtu->g);
}

void mtu3_gadget_cleanup(struct mtu3 *mtu)
{
	usb_del_gadget_udc(&mtu->g);
}

void mtu3_gadget_resume(struct mtu3 *mtu)
{
	dev_dbg(mtu->dev, "gadget RESUME\n");
	if (mtu->gadget_driver && mtu->gadget_driver->resume) {
		spin_unlock(&mtu->lock);
		mtu->gadget_driver->resume(&mtu->g);
		spin_lock(&mtu->lock);
	}
}

/* called when SOF packets stop for 3+ msec or enters U3 */
void mtu3_gadget_suspend(struct mtu3 *mtu)
{
	dev_dbg(mtu->dev, "gadget SUSPEND\n");
	if (mtu->gadget_driver && mtu->gadget_driver->suspend) {
		spin_unlock(&mtu->lock);
		mtu->gadget_driver->suspend(&mtu->g);
		spin_lock(&mtu->lock);
	}
}

/* called when VBUS drops below session threshold, and in other cases */
void mtu3_gadget_disconnect(struct mtu3 *mtu)
{
	dev_dbg(mtu->dev, "gadget DISCONNECT\n");
	if (mtu->gadget_driver && mtu->gadget_driver->disconnect) {
		spin_unlock(&mtu->lock);
		mtu->gadget_driver->disconnect(&mtu->g);
		spin_lock(&mtu->lock);
	}

	mtu3_state_reset(mtu);
	usb_gadget_set_state(&mtu->g, USB_STATE_NOTATTACHED);
}

void mtu3_gadget_reset(struct mtu3 *mtu)
{
	dev_dbg(mtu->dev, "gadget RESET\n");

	/* report disconnect, if we didn't flush EP state */
	if (mtu->g.speed != USB_SPEED_UNKNOWN)
		mtu3_gadget_disconnect(mtu);
	else
		mtu3_state_reset(mtu);
}
Commit	Line	Data
5fd54ace	1	// SPDX-License-Identifier: GPL-2.0
df2069ac CY	2	/*
	3	* mtu3_gadget.c - MediaTek usb3 DRD peripheral support
	4	*
	5	* Copyright (C) 2016 MediaTek Inc.
	6	*
	7	* Author: Chunfeng Yun <chunfeng.yun@mediatek.com>
df2069ac CY	8	*/
	9
	10	#include "mtu3.h"
83374e03	11	#include "mtu3_trace.h"
df2069ac CY	12
	13	void mtu3_req_complete(struct mtu3_ep *mep,
	14	struct usb_request *req, int status)
	15	__releases(mep->mtu->lock)
	16	__acquires(mep->mtu->lock)
	17	{
ab4dc051 CY	18	struct mtu3_request *mreq = to_mtu3_request(req);
ab4dc051 CY	19	struct mtu3 *mtu = mreq->mtu;
df2069ac	20
df2069ac	21	list_del(&mreq->list);
ab4dc051 CY	22	if (req->status == -EINPROGRESS)
ab4dc051 CY	23	req->status = status;
df2069ac	24
83374e03	25	trace_mtu3_req_complete(mreq);
df2069ac CY	26	spin_unlock(&mtu->lock);
	27
	28	/* ep0 makes use of PIO, needn't unmap it */
	29	if (mep->epnum)
	30	usb_gadget_unmap_request(&mtu->g, req, mep->is_in);
	31
ab4dc051 CY	32	dev_dbg(mtu->dev, "%s complete req: %p, sts %d, %d/%d\n",
ab4dc051 CY	33	mep->name, req, req->status, req->actual, req->length);
df2069ac	34
ab4dc051	35	usb_gadget_giveback_request(&mep->ep, req);
df2069ac	36	spin_lock(&mtu->lock);
df2069ac CY	37	}
	38
	39	static void nuke(struct mtu3_ep *mep, const int status)
	40	{
	41	struct mtu3_request *mreq = NULL;
	42
df2069ac CY	43	if (list_empty(&mep->req_list))
	44	return;
	45
	46	dev_dbg(mep->mtu->dev, "abort %s's req: sts %d\n", mep->name, status);
	47
	48	/* exclude EP0 */
	49	if (mep->epnum)
	50	mtu3_qmu_flush(mep);
	51
	52	while (!list_empty(&mep->req_list)) {
	53	mreq = list_first_entry(&mep->req_list,
	54	struct mtu3_request, list);
	55	mtu3_req_complete(mep, &mreq->request, status);
	56	}
	57	}
	58
	59	static int mtu3_ep_enable(struct mtu3_ep *mep)
	60	{
	61	const struct usb_endpoint_descriptor *desc;
a29de31b	62	const struct usb_ss_ep_comp_descriptor *comp_desc;
df2069ac CY	63	struct mtu3 *mtu = mep->mtu;
	64	u32 interval = 0;
	65	u32 mult = 0;
	66	u32 burst = 0;
df2069ac CY	67	int ret;
	68
	69	desc = mep->desc;
a29de31b	70	comp_desc = mep->comp_desc;
df2069ac	71	mep->type = usb_endpoint_type(desc);
35894a4e	72	mep->maxp = usb_endpoint_maxp(desc);
df2069ac CY	73
df2069ac CY	74	switch (mtu->g.speed) {
a29de31b	75	case USB_SPEED_SUPER:
4d79e042	76	case USB_SPEED_SUPER_PLUS:
a29de31b CY	77	if (usb_endpoint_xfer_int(desc) \|\|
	78	usb_endpoint_xfer_isoc(desc)) {
	79	interval = desc->bInterval;
	80	interval = clamp_val(interval, 1, 16) - 1;
	81	if (usb_endpoint_xfer_isoc(desc) && comp_desc)
	82	mult = comp_desc->bmAttributes;
	83	}
	84	if (comp_desc)
	85	burst = comp_desc->bMaxBurst;
	86
	87	break;
df2069ac CY	88	case USB_SPEED_HIGH:
	89	if (usb_endpoint_xfer_isoc(desc) \|\|
	90	usb_endpoint_xfer_int(desc)) {
	91	interval = desc->bInterval;
	92	interval = clamp_val(interval, 1, 16) - 1;
35894a4e	93	mult = usb_endpoint_maxp_mult(desc) - 1;
df2069ac CY	94	}
	95	break;
	96	default:
	97	break; /others are ignored /
	98	}
	99
	100	dev_dbg(mtu->dev, "%s maxp:%d, interval:%d, burst:%d, mult:%d\n",
	101	__func__, mep->maxp, interval, burst, mult);
	102
	103	mep->ep.maxpacket = mep->maxp;
	104	mep->ep.desc = desc;
a29de31b	105	mep->ep.comp_desc = comp_desc;
df2069ac CY	106
	107	/* slot mainly affects bulk/isoc transfer, so ignore int */
	108	mep->slot = usb_endpoint_xfer_int(desc) ? 0 : mtu->slot;
	109
	110	ret = mtu3_config_ep(mtu, mep, interval, burst, mult);
	111	if (ret < 0)
	112	return ret;
	113
	114	ret = mtu3_gpd_ring_alloc(mep);
	115	if (ret < 0) {
	116	mtu3_deconfig_ep(mtu, mep);
	117	return ret;
	118	}
	119
	120	mtu3_qmu_start(mep);
	121
	122	return 0;
	123	}
	124
	125	static int mtu3_ep_disable(struct mtu3_ep *mep)
	126	{
	127	struct mtu3 *mtu = mep->mtu;
	128
	129	mtu3_qmu_stop(mep);
	130
	131	/* abort all pending requests */
	132	nuke(mep, -ESHUTDOWN);
	133	mtu3_deconfig_ep(mtu, mep);
	134	mtu3_gpd_ring_free(mep);
	135
	136	mep->desc = NULL;
	137	mep->ep.desc = NULL;
a29de31b	138	mep->comp_desc = NULL;
df2069ac CY	139	mep->type = 0;
	140	mep->flags = 0;
	141
	142	return 0;
	143	}
	144
	145	static int mtu3_gadget_ep_enable(struct usb_ep *ep,
	146	const struct usb_endpoint_descriptor *desc)
	147	{
	148	struct mtu3_ep *mep;
	149	struct mtu3 *mtu;
	150	unsigned long flags;
	151	int ret = -EINVAL;
	152
	153	if (!ep \|\| !desc \|\| desc->bDescriptorType != USB_DT_ENDPOINT) {
	154	pr_debug("%s invalid parameters\n", __func__);
	155	return -EINVAL;
	156	}
	157
	158	if (!desc->wMaxPacketSize) {
	159	pr_debug("%s missing wMaxPacketSize\n", __func__);
	160	return -EINVAL;
	161	}
	162	mep = to_mtu3_ep(ep);
	163	mtu = mep->mtu;
	164
	165	/* check ep number and direction against endpoint */
	166	if (usb_endpoint_num(desc) != mep->epnum)
	167	return -EINVAL;
	168
	169	if (!!usb_endpoint_dir_in(desc) ^ !!mep->is_in)
	170	return -EINVAL;
	171
	172	dev_dbg(mtu->dev, "%s %s\n", __func__, ep->name);
	173
	174	if (mep->flags & MTU3_EP_ENABLED) {
	175	dev_WARN_ONCE(mtu->dev, true, "%s is already enabled\n",
	176	mep->name);
	177	return 0;
	178	}
	179
	180	spin_lock_irqsave(&mtu->lock, flags);
	181	mep->desc = desc;
a29de31b	182	mep->comp_desc = ep->comp_desc;
df2069ac CY	183
	184	ret = mtu3_ep_enable(mep);
	185	if (ret)
	186	goto error;
	187
54402373	188	mep->flags = MTU3_EP_ENABLED;
df2069ac CY	189	mtu->active_ep++;
	190
	191	error:
	192	spin_unlock_irqrestore(&mtu->lock, flags);
	193
	194	dev_dbg(mtu->dev, "%s active_ep=%d\n", __func__, mtu->active_ep);
83374e03	195	trace_mtu3_gadget_ep_enable(mep);
df2069ac CY	196
	197	return ret;
	198	}
	199
	200	static int mtu3_gadget_ep_disable(struct usb_ep *ep)
	201	{
	202	struct mtu3_ep *mep = to_mtu3_ep(ep);
	203	struct mtu3 *mtu = mep->mtu;
	204	unsigned long flags;
	205
	206	dev_dbg(mtu->dev, "%s %s\n", __func__, mep->name);
83374e03	207	trace_mtu3_gadget_ep_disable(mep);
df2069ac CY	208
	209	if (!(mep->flags & MTU3_EP_ENABLED)) {
	210	dev_warn(mtu->dev, "%s is already disabled\n", mep->name);
	211	return 0;
	212	}
	213
	214	spin_lock_irqsave(&mtu->lock, flags);
	215	mtu3_ep_disable(mep);
54402373	216	mep->flags = 0;
df2069ac CY	217	mtu->active_ep--;
	218	spin_unlock_irqrestore(&(mtu->lock), flags);
	219
	220	dev_dbg(mtu->dev, "%s active_ep=%d, mtu3 is_active=%d\n",
	221	__func__, mtu->active_ep, mtu->is_active);
	222
	223	return 0;
	224	}
	225
	226	struct usb_request mtu3_alloc_request(struct usb_ep ep, gfp_t gfp_flags)
	227	{
	228	struct mtu3_ep *mep = to_mtu3_ep(ep);
	229	struct mtu3_request *mreq;
	230
	231	mreq = kzalloc(sizeof(*mreq), gfp_flags);
	232	if (!mreq)
	233	return NULL;
	234
	235	mreq->request.dma = DMA_ADDR_INVALID;
	236	mreq->epnum = mep->epnum;
	237	mreq->mep = mep;
83374e03	238	trace_mtu3_alloc_request(mreq);
df2069ac CY	239
	240	return &mreq->request;
	241	}
	242
	243	void mtu3_free_request(struct usb_ep ep, struct usb_request req)
	244	{
83374e03 CY	245	struct mtu3_request *mreq = to_mtu3_request(req);
	246
	247	trace_mtu3_free_request(mreq);
	248	kfree(mreq);
df2069ac CY	249	}
	250
	251	static int mtu3_gadget_queue(struct usb_ep *ep,
	252	struct usb_request *req, gfp_t gfp_flags)
	253	{
fde9156a CY	254	struct mtu3_ep *mep = to_mtu3_ep(ep);
	255	struct mtu3_request *mreq = to_mtu3_request(req);
	256	struct mtu3 *mtu = mep->mtu;
df2069ac CY	257	unsigned long flags;
	258	int ret = 0;
	259
df2069ac CY	260	if (!req->buf)
	261	return -ENODATA;
	262
df2069ac CY	263	if (mreq->mep != mep)
	264	return -EINVAL;
	265
	266	dev_dbg(mtu->dev, "%s %s EP%d(%s), req=%p, maxp=%d, len#%d\n",
	267	__func__, mep->is_in ? "TX" : "RX", mreq->epnum, ep->name,
	268	mreq, ep->maxpacket, mreq->request.length);
	269
48e0d373 CY	270	if (req->length > GPD_BUF_SIZE \|\|
48e0d373 CY	271	(mtu->gen2cp && req->length > GPD_BUF_SIZE_EL)) {
df2069ac CY	272	dev_warn(mtu->dev,
df2069ac CY	273	"req length > supported MAX:%d requested:%d\n",
48e0d373 CY	274	mtu->gen2cp ? GPD_BUF_SIZE_EL : GPD_BUF_SIZE,
48e0d373 CY	275	req->length);
df2069ac CY	276	return -EOPNOTSUPP;
	277	}
	278
	279	/* don't queue if the ep is down */
	280	if (!mep->desc) {
	281	dev_dbg(mtu->dev, "req=%p queued to %s while it's disabled\n",
	282	req, ep->name);
	283	return -ESHUTDOWN;
	284	}
	285
fde9156a	286	mreq->mtu = mtu;
df2069ac CY	287	mreq->request.actual = 0;
	288	mreq->request.status = -EINPROGRESS;
	289
	290	ret = usb_gadget_map_request(&mtu->g, req, mep->is_in);
	291	if (ret) {
	292	dev_err(mtu->dev, "dma mapping failed\n");
	293	return ret;
	294	}
	295
	296	spin_lock_irqsave(&mtu->lock, flags);
	297
	298	if (mtu3_prepare_transfer(mep)) {
	299	ret = -EAGAIN;
	300	goto error;
	301	}
	302
	303	list_add_tail(&mreq->list, &mep->req_list);
	304	mtu3_insert_gpd(mep, mreq);
	305	mtu3_qmu_resume(mep);
	306
	307	error:
	308	spin_unlock_irqrestore(&mtu->lock, flags);
83374e03	309	trace_mtu3_gadget_queue(mreq);
df2069ac CY	310
	311	return ret;
	312	}
	313
	314	static int mtu3_gadget_dequeue(struct usb_ep ep, struct usb_request req)
	315	{
	316	struct mtu3_ep *mep = to_mtu3_ep(ep);
	317	struct mtu3_request *mreq = to_mtu3_request(req);
	318	struct mtu3_request *r;
fde9156a	319	struct mtu3 *mtu = mep->mtu;
df2069ac CY	320	unsigned long flags;
df2069ac CY	321	int ret = 0;
df2069ac	322
fde9156a	323	if (mreq->mep != mep)
df2069ac CY	324	return -EINVAL;
	325
	326	dev_dbg(mtu->dev, "%s : req=%p\n", __func__, req);
83374e03	327	trace_mtu3_gadget_dequeue(mreq);
df2069ac CY	328
	329	spin_lock_irqsave(&mtu->lock, flags);
	330
	331	list_for_each_entry(r, &mep->req_list, list) {
	332	if (r == mreq)
	333	break;
	334	}
	335	if (r != mreq) {
	336	dev_dbg(mtu->dev, "req=%p not queued to %s\n", req, ep->name);
	337	ret = -EINVAL;
	338	goto done;
	339	}
	340
	341	mtu3_qmu_flush(mep); /* REVISIT: set BPS ?? */
	342	mtu3_req_complete(mep, req, -ECONNRESET);
	343	mtu3_qmu_start(mep);
	344
	345	done:
	346	spin_unlock_irqrestore(&mtu->lock, flags);
	347
	348	return ret;
	349	}
	350
	351	/*
	352	* Set or clear the halt bit of an EP.
	353	* A halted EP won't TX/RX any data but will queue requests.
	354	*/
	355	static int mtu3_gadget_ep_set_halt(struct usb_ep *ep, int value)
	356	{
	357	struct mtu3_ep *mep = to_mtu3_ep(ep);
	358	struct mtu3 *mtu = mep->mtu;
	359	struct mtu3_request *mreq;
	360	unsigned long flags;
	361	int ret = 0;
	362
df2069ac CY	363	dev_dbg(mtu->dev, "%s : %s...", __func__, ep->name);
	364
	365	spin_lock_irqsave(&mtu->lock, flags);
	366
	367	if (mep->type == USB_ENDPOINT_XFER_ISOC) {
	368	ret = -EINVAL;
	369	goto done;
	370	}
	371
	372	mreq = next_request(mep);
	373	if (value) {
	374	/*
	375	* If there is not request for TX-EP, QMU will not transfer
	376	* data to TX-FIFO, so no need check whether TX-FIFO
	377	* holds bytes or not here
	378	*/
	379	if (mreq) {
	380	dev_dbg(mtu->dev, "req in progress, cannot halt %s\n",
	381	ep->name);
	382	ret = -EAGAIN;
	383	goto done;
	384	}
	385	} else {
54402373	386	mep->flags &= ~MTU3_EP_WEDGE;
df2069ac CY	387	}
	388
	389	dev_dbg(mtu->dev, "%s %s stall\n", ep->name, value ? "set" : "clear");
	390
	391	mtu3_ep_stall_set(mep, value);
	392
	393	done:
	394	spin_unlock_irqrestore(&mtu->lock, flags);
83374e03	395	trace_mtu3_gadget_ep_set_halt(mep);
df2069ac CY	396
	397	return ret;
	398	}
	399
	400	/* Sets the halt feature with the clear requests ignored */
	401	static int mtu3_gadget_ep_set_wedge(struct usb_ep *ep)
	402	{
	403	struct mtu3_ep *mep = to_mtu3_ep(ep);
	404
54402373	405	mep->flags \|= MTU3_EP_WEDGE;
df2069ac CY	406
	407	return usb_ep_set_halt(ep);
	408	}
	409
	410	static const struct usb_ep_ops mtu3_ep_ops = {
	411	.enable = mtu3_gadget_ep_enable,
	412	.disable = mtu3_gadget_ep_disable,
	413	.alloc_request = mtu3_alloc_request,
	414	.free_request = mtu3_free_request,
	415	.queue = mtu3_gadget_queue,
	416	.dequeue = mtu3_gadget_dequeue,
	417	.set_halt = mtu3_gadget_ep_set_halt,
	418	.set_wedge = mtu3_gadget_ep_set_wedge,
	419	};
	420
	421	static int mtu3_gadget_get_frame(struct usb_gadget *gadget)
	422	{
	423	struct mtu3 *mtu = gadget_to_mtu3(gadget);
	424
	425	return (int)mtu3_readl(mtu->mac_base, U3D_USB20_FRAME_NUM);
	426	}
	427
	428	static int mtu3_gadget_wakeup(struct usb_gadget *gadget)
	429	{
	430	struct mtu3 *mtu = gadget_to_mtu3(gadget);
	431	unsigned long flags;
	432
	433	dev_dbg(mtu->dev, "%s\n", __func__);
	434
	435	/* remote wakeup feature is not enabled by host */
	436	if (!mtu->may_wakeup)
	437	return -EOPNOTSUPP;
	438
	439	spin_lock_irqsave(&mtu->lock, flags);
4d79e042	440	if (mtu->g.speed >= USB_SPEED_SUPER) {
a29de31b CY	441	mtu3_setbits(mtu->mac_base, U3D_LINK_POWER_CONTROL, UX_EXIT);
	442	} else {
	443	mtu3_setbits(mtu->mac_base, U3D_POWER_MANAGEMENT, RESUME);
	444	spin_unlock_irqrestore(&mtu->lock, flags);
	445	usleep_range(10000, 11000);
	446	spin_lock_irqsave(&mtu->lock, flags);
	447	mtu3_clrbits(mtu->mac_base, U3D_POWER_MANAGEMENT, RESUME);
	448	}
df2069ac CY	449	spin_unlock_irqrestore(&mtu->lock, flags);
	450	return 0;
	451	}
	452
	453	static int mtu3_gadget_set_self_powered(struct usb_gadget *gadget,
	454	int is_selfpowered)
	455	{
	456	struct mtu3 *mtu = gadget_to_mtu3(gadget);
	457
	458	mtu->is_self_powered = !!is_selfpowered;
	459	return 0;
	460	}
	461
	462	static int mtu3_gadget_pullup(struct usb_gadget *gadget, int is_on)
	463	{
	464	struct mtu3 *mtu = gadget_to_mtu3(gadget);
	465	unsigned long flags;
	466
	467	dev_dbg(mtu->dev, "%s (%s) for %sactive device\n", __func__,
	468	is_on ? "on" : "off", mtu->is_active ? "" : "in");
	469
	470	/* we'd rather not pullup unless the device is active. */
	471	spin_lock_irqsave(&mtu->lock, flags);
	472
	473	is_on = !!is_on;
	474	if (!mtu->is_active) {
	475	/* save it for mtu3_start() to process the request */
	476	mtu->softconnect = is_on;
	477	} else if (is_on != mtu->softconnect) {
	478	mtu->softconnect = is_on;
a29de31b	479	mtu3_dev_on_off(mtu, is_on);
df2069ac CY	480	}
	481
	482	spin_unlock_irqrestore(&mtu->lock, flags);
	483
	484	return 0;
	485	}
	486
	487	static int mtu3_gadget_start(struct usb_gadget *gadget,
	488	struct usb_gadget_driver *driver)
	489	{
	490	struct mtu3 *mtu = gadget_to_mtu3(gadget);
	491	unsigned long flags;
	492
	493	if (mtu->gadget_driver) {
	494	dev_err(mtu->dev, "%s is already bound to %s\n",
	495	mtu->g.name, mtu->gadget_driver->driver.name);
	496	return -EBUSY;
	497	}
	498
	499	dev_dbg(mtu->dev, "bind driver %s\n", driver->function);
	500
	501	spin_lock_irqsave(&mtu->lock, flags);
	502
	503	mtu->softconnect = 0;
	504	mtu->gadget_driver = driver;
	505
d0ed062a CY	506	if (mtu->ssusb->dr_mode == USB_DR_MODE_PERIPHERAL)
d0ed062a CY	507	mtu3_start(mtu);
df2069ac CY	508
	509	spin_unlock_irqrestore(&mtu->lock, flags);
	510
	511	return 0;
	512	}
	513
	514	static void stop_activity(struct mtu3 *mtu)
	515	{
	516	struct usb_gadget_driver *driver = mtu->gadget_driver;
	517	int i;
	518
	519	/* don't disconnect if it's not connected */
	520	if (mtu->g.speed == USB_SPEED_UNKNOWN)
	521	driver = NULL;
	522	else
	523	mtu->g.speed = USB_SPEED_UNKNOWN;
	524
	525	/* deactivate the hardware */
	526	if (mtu->softconnect) {
	527	mtu->softconnect = 0;
a29de31b	528	mtu3_dev_on_off(mtu, 0);
df2069ac CY	529	}
	530
	531	/*
	532	* killing any outstanding requests will quiesce the driver;
	533	* then report disconnect
	534	*/
	535	nuke(mtu->ep0, -ESHUTDOWN);
	536	for (i = 1; i < mtu->num_eps; i++) {
	537	nuke(mtu->in_eps + i, -ESHUTDOWN);
	538	nuke(mtu->out_eps + i, -ESHUTDOWN);
	539	}
	540
	541	if (driver) {
	542	spin_unlock(&mtu->lock);
	543	driver->disconnect(&mtu->g);
	544	spin_lock(&mtu->lock);
	545	}
	546	}
	547
	548	static int mtu3_gadget_stop(struct usb_gadget *g)
	549	{
	550	struct mtu3 *mtu = gadget_to_mtu3(g);
	551	unsigned long flags;
	552
	553	dev_dbg(mtu->dev, "%s\n", __func__);
	554
	555	spin_lock_irqsave(&mtu->lock, flags);
	556
	557	stop_activity(mtu);
	558	mtu->gadget_driver = NULL;
	559
d0ed062a CY	560	if (mtu->ssusb->dr_mode == USB_DR_MODE_PERIPHERAL)
d0ed062a CY	561	mtu3_stop(mtu);
df2069ac CY	562
	563	spin_unlock_irqrestore(&mtu->lock, flags);
	564
20914919	565	synchronize_irq(mtu->irq);
df2069ac CY	566	return 0;
	567	}
	568
dc4c1aa7 CY	569	static void
	570	mtu3_gadget_set_speed(struct usb_gadget *g, enum usb_device_speed speed)
	571	{
	572	struct mtu3 *mtu = gadget_to_mtu3(g);
	573	unsigned long flags;
	574
	575	dev_dbg(mtu->dev, "%s %s\n", __func__, usb_speed_string(speed));
	576
	577	spin_lock_irqsave(&mtu->lock, flags);
	578	mtu3_set_speed(mtu, speed);
	579	spin_unlock_irqrestore(&mtu->lock, flags);
	580	}
	581
df2069ac CY	582	static const struct usb_gadget_ops mtu3_gadget_ops = {
	583	.get_frame = mtu3_gadget_get_frame,
	584	.wakeup = mtu3_gadget_wakeup,
	585	.set_selfpowered = mtu3_gadget_set_self_powered,
	586	.pullup = mtu3_gadget_pullup,
	587	.udc_start = mtu3_gadget_start,
	588	.udc_stop = mtu3_gadget_stop,
dc4c1aa7	589	.udc_set_speed = mtu3_gadget_set_speed,
df2069ac CY	590	};
df2069ac CY	591
0eae4958 CY	592	static void mtu3_state_reset(struct mtu3 *mtu)
	593	{
	594	mtu->address = 0;
	595	mtu->ep0_state = MU3D_EP0_STATE_SETUP;
	596	mtu->may_wakeup = 0;
	597	mtu->u1_enable = 0;
	598	mtu->u2_enable = 0;
	599	mtu->delayed_status = false;
	600	mtu->test_mode = false;
	601	}
	602
df2069ac CY	603	static void init_hw_ep(struct mtu3 mtu, struct mtu3_ep mep,
	604	u32 epnum, u32 is_in)
	605	{
	606	mep->epnum = epnum;
	607	mep->mtu = mtu;
	608	mep->is_in = is_in;
	609
	610	INIT_LIST_HEAD(&mep->req_list);
	611
	612	sprintf(mep->name, "ep%d%s", epnum,
	613	!epnum ? "" : (is_in ? "in" : "out"));
	614
	615	mep->ep.name = mep->name;
	616	INIT_LIST_HEAD(&mep->ep.ep_list);
	617
a29de31b	618	/* initialize maxpacket as SS */
df2069ac	619	if (!epnum) {
a29de31b	620	usb_ep_set_maxpacket_limit(&mep->ep, 512);
df2069ac CY	621	mep->ep.caps.type_control = true;
	622	mep->ep.ops = &mtu3_ep0_ops;
	623	mtu->g.ep0 = &mep->ep;
	624	} else {
a29de31b	625	usb_ep_set_maxpacket_limit(&mep->ep, 1024);
df2069ac CY	626	mep->ep.caps.type_iso = true;
	627	mep->ep.caps.type_bulk = true;
	628	mep->ep.caps.type_int = true;
	629	mep->ep.ops = &mtu3_ep_ops;
	630	list_add_tail(&mep->ep.ep_list, &mtu->g.ep_list);
	631	}
	632
	633	dev_dbg(mtu->dev, "%s, name=%s, maxp=%d\n", __func__, mep->ep.name,
	634	mep->ep.maxpacket);
	635
	636	if (!epnum) {
	637	mep->ep.caps.dir_in = true;
	638	mep->ep.caps.dir_out = true;
	639	} else if (is_in) {
	640	mep->ep.caps.dir_in = true;
	641	} else {
	642	mep->ep.caps.dir_out = true;
	643	}
	644	}
	645
	646	static void mtu3_gadget_init_eps(struct mtu3 *mtu)
	647	{
	648	u8 epnum;
	649
	650	/* initialize endpoint list just once */
	651	INIT_LIST_HEAD(&(mtu->g.ep_list));
	652
	653	dev_dbg(mtu->dev, "%s num_eps(1 for a pair of tx&rx ep)=%d\n",
	654	__func__, mtu->num_eps);
	655
	656	init_hw_ep(mtu, mtu->ep0, 0, 0);
	657	for (epnum = 1; epnum < mtu->num_eps; epnum++) {
	658	init_hw_ep(mtu, mtu->in_eps + epnum, epnum, 1);
	659	init_hw_ep(mtu, mtu->out_eps + epnum, epnum, 0);
	660	}
	661	}
	662
	663	int mtu3_gadget_setup(struct mtu3 *mtu)
	664	{
df2069ac	665	mtu->g.ops = &mtu3_gadget_ops;
a29de31b	666	mtu->g.max_speed = mtu->max_speed;
df2069ac CY	667	mtu->g.speed = USB_SPEED_UNKNOWN;
	668	mtu->g.sg_supported = 0;
	669	mtu->g.name = MTU3_DRIVER_NAME;
	670	mtu->is_active = 0;
fe7c994a	671	mtu->delayed_status = false;
df2069ac CY	672
	673	mtu3_gadget_init_eps(mtu);
	674
ba428976	675	return usb_add_gadget_udc(mtu->dev, &mtu->g);
df2069ac CY	676	}
	677
	678	void mtu3_gadget_cleanup(struct mtu3 *mtu)
	679	{
	680	usb_del_gadget_udc(&mtu->g);
	681	}
	682
	683	void mtu3_gadget_resume(struct mtu3 *mtu)
	684	{
	685	dev_dbg(mtu->dev, "gadget RESUME\n");
	686	if (mtu->gadget_driver && mtu->gadget_driver->resume) {
	687	spin_unlock(&mtu->lock);
	688	mtu->gadget_driver->resume(&mtu->g);
	689	spin_lock(&mtu->lock);
	690	}
	691	}
	692
	693	/* called when SOF packets stop for 3+ msec or enters U3 */
	694	void mtu3_gadget_suspend(struct mtu3 *mtu)
	695	{
	696	dev_dbg(mtu->dev, "gadget SUSPEND\n");
	697	if (mtu->gadget_driver && mtu->gadget_driver->suspend) {
	698	spin_unlock(&mtu->lock);
	699	mtu->gadget_driver->suspend(&mtu->g);
	700	spin_lock(&mtu->lock);
	701	}
	702	}
	703
	704	/* called when VBUS drops below session threshold, and in other cases */
	705	void mtu3_gadget_disconnect(struct mtu3 *mtu)
	706	{
	707	dev_dbg(mtu->dev, "gadget DISCONNECT\n");
	708	if (mtu->gadget_driver && mtu->gadget_driver->disconnect) {
	709	spin_unlock(&mtu->lock);
	710	mtu->gadget_driver->disconnect(&mtu->g);
	711	spin_lock(&mtu->lock);
	712	}
	713
0eae4958	714	mtu3_state_reset(mtu);
df2069ac CY	715	usb_gadget_set_state(&mtu->g, USB_STATE_NOTATTACHED);
	716	}
	717
	718	void mtu3_gadget_reset(struct mtu3 *mtu)
	719	{
	720	dev_dbg(mtu->dev, "gadget RESET\n");
	721
	722	/* report disconnect, if we didn't flush EP state */
	723	if (mtu->g.speed != USB_SPEED_UNKNOWN)
	724	mtu3_gadget_disconnect(mtu);
0eae4958 CY	725	else
0eae4958 CY	726	mtu3_state_reset(mtu);
df2069ac	727	}