drivers/usb/c67x00/c67x00-hcd.c - kernel/common - Git at Google

 // SPDX-License-Identifier: GPL-2.0+
 /*
  * c67x00-hcd.c: Cypress C67X00 USB Host Controller Driver
  *
  * Copyright (C) 2006-2008 Barco N.V.
  *    Derived from the Cypress cy7c67200/300 ezusb linux driver and
  *    based on multiple host controller drivers inside the linux kernel.
  */

 #include <linux/device.h>
 #include <linux/platform_device.h>
 #include <linux/usb.h>

 #include "c67x00.h"
 #include "c67x00-hcd.h"

 /* --------------------------------------------------------------------------
  * Root Hub Support
  */

 static __u8 c67x00_hub_des[] = {
 	0x09,			/*  __u8  bLength; */
 	USB_DT_HUB,		/*  __u8  bDescriptorType; Hub-descriptor */
 	0x02,			/*  __u8  bNbrPorts; */
 	0x00,			/* __u16  wHubCharacteristics; */
 	0x00,			/*   (per-port OC, no power switching) */
 	0x32,			/*  __u8  bPwrOn2pwrGood; 2ms */
 	0x00,			/*  __u8  bHubContrCurrent; 0 mA */
 	0x00,			/*  __u8  DeviceRemovable; ** 7 Ports max ** */
 	0xff,			/*  __u8  PortPwrCtrlMask; ** 7 ports max ** */
 };

 static void c67x00_hub_reset_host_port(struct c67x00_sie *sie, int port)
 {
 	struct c67x00_hcd *c67x00 = sie->private_data;
 	unsigned long flags;

 	c67x00_ll_husb_reset(sie, port);

 	spin_lock_irqsave(&c67x00->lock, flags);
 	c67x00_ll_husb_reset_port(sie, port);
 	spin_unlock_irqrestore(&c67x00->lock, flags);

 	c67x00_ll_set_husb_eot(sie->dev, DEFAULT_EOT);
 }

 static int c67x00_hub_status_data(struct usb_hcd *hcd, char *buf)
 {
 	struct c67x00_hcd *c67x00 = hcd_to_c67x00_hcd(hcd);
 	struct c67x00_sie *sie = c67x00->sie;
 	u16 status;
 	int i;

 	*buf = 0;
 	status = c67x00_ll_usb_get_status(sie);
 	for (i = 0; i < C67X00_PORTS; i++)
 		if (status & PORT_CONNECT_CHANGE(i))
 			*buf |= (1 << i);

 	/* bit 0 denotes hub change, b1..n port change */
 	*buf <<= 1;

 	return !!*buf;
 }

 static int c67x00_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
 			      u16 wIndex, char *buf, u16 wLength)
 {
 	struct c67x00_hcd *c67x00 = hcd_to_c67x00_hcd(hcd);
 	struct c67x00_sie *sie = c67x00->sie;
 	u16 status, usb_status;
 	int len = 0;
 	unsigned int port = wIndex-1;
 	u16 wPortChange, wPortStatus;

 	switch (typeReq) {

 	case GetHubStatus:
 		*(__le32 *) buf = cpu_to_le32(0);
 		len = 4;		/* hub power */
 		break;

 	case GetPortStatus:
 		if (wIndex > C67X00_PORTS)
 			return -EPIPE;

 		status = c67x00_ll_usb_get_status(sie);
 		usb_status = c67x00_ll_get_usb_ctl(sie);

 		wPortChange = 0;
 		if (status & PORT_CONNECT_CHANGE(port))
 			wPortChange |= USB_PORT_STAT_C_CONNECTION;

 		wPortStatus = USB_PORT_STAT_POWER;
 		if (!(status & PORT_SE0_STATUS(port)))
 			wPortStatus |= USB_PORT_STAT_CONNECTION;
 		if (usb_status & LOW_SPEED_PORT(port)) {
 			wPortStatus |= USB_PORT_STAT_LOW_SPEED;
 			c67x00->low_speed_ports |= (1 << port);
 		} else
 			c67x00->low_speed_ports &= ~(1 << port);

 		if (usb_status & SOF_EOP_EN(port))
 			wPortStatus |= USB_PORT_STAT_ENABLE;

 		*(__le16 *) buf = cpu_to_le16(wPortStatus);
 		*(__le16 *) (buf + 2) = cpu_to_le16(wPortChange);
 		len = 4;
 		break;

 	case SetHubFeature:	/* We don't implement these */
 	case ClearHubFeature:
 		switch (wValue) {
 		case C_HUB_OVER_CURRENT:
 		case C_HUB_LOCAL_POWER:
 			len = 0;
 			break;

 		default:
 			return -EPIPE;
 		}
 		break;

 	case SetPortFeature:
 		if (wIndex > C67X00_PORTS)
 			return -EPIPE;

 		switch (wValue) {
 		case USB_PORT_FEAT_SUSPEND:
 			dev_dbg(c67x00_hcd_dev(c67x00),
 				"SetPortFeature %d (SUSPEND)\n", port);
 			len = 0;
 			break;

 		case USB_PORT_FEAT_RESET:
 			c67x00_hub_reset_host_port(sie, port);
 			len = 0;
 			break;

 		case USB_PORT_FEAT_POWER:
 			/* Power always enabled */
 			len = 0;
 			break;

 		default:
 			dev_dbg(c67x00_hcd_dev(c67x00),
 				"%s: SetPortFeature %d (0x%04x) Error!\n",
 				__func__, port, wValue);
 			return -EPIPE;
 		}
 		break;

 	case ClearPortFeature:
 		if (wIndex > C67X00_PORTS)
 			return -EPIPE;

 		switch (wValue) {
 		case USB_PORT_FEAT_ENABLE:
 			/* Reset the port so that the c67x00 also notices the
 			 * disconnect */
 			c67x00_hub_reset_host_port(sie, port);
 			len = 0;
 			break;

 		case USB_PORT_FEAT_C_ENABLE:
 			dev_dbg(c67x00_hcd_dev(c67x00),
 				"ClearPortFeature (%d): C_ENABLE\n", port);
 			len = 0;
 			break;

 		case USB_PORT_FEAT_SUSPEND:
 			dev_dbg(c67x00_hcd_dev(c67x00),
 				"ClearPortFeature (%d): SUSPEND\n", port);
 			len = 0;
 			break;

 		case USB_PORT_FEAT_C_SUSPEND:
 			dev_dbg(c67x00_hcd_dev(c67x00),
 				"ClearPortFeature (%d): C_SUSPEND\n", port);
 			len = 0;
 			break;

 		case USB_PORT_FEAT_POWER:
 			dev_dbg(c67x00_hcd_dev(c67x00),
 				"ClearPortFeature (%d): POWER\n", port);
 			return -EPIPE;

 		case USB_PORT_FEAT_C_CONNECTION:
 			c67x00_ll_usb_clear_status(sie,
 						   PORT_CONNECT_CHANGE(port));
 			len = 0;
 			break;

 		case USB_PORT_FEAT_C_OVER_CURRENT:
 			dev_dbg(c67x00_hcd_dev(c67x00),
 				"ClearPortFeature (%d): OVER_CURRENT\n", port);
 			len = 0;
 			break;

 		case USB_PORT_FEAT_C_RESET:
 			dev_dbg(c67x00_hcd_dev(c67x00),
 				"ClearPortFeature (%d): C_RESET\n", port);
 			len = 0;
 			break;

 		default:
 			dev_dbg(c67x00_hcd_dev(c67x00),
 				"%s: ClearPortFeature %d (0x%04x) Error!\n",
 				__func__, port, wValue);
 			return -EPIPE;
 		}
 		break;

 	case GetHubDescriptor:
 		len = min_t(unsigned int, sizeof(c67x00_hub_des), wLength);
 		memcpy(buf, c67x00_hub_des, len);
 		break;

 	default:
 		dev_dbg(c67x00_hcd_dev(c67x00), "%s: unknown\n", __func__);
 		return -EPIPE;
 	}

 	return 0;
 }

 /* ---------------------------------------------------------------------
  * Main part of host controller driver
  */

 /**
  * c67x00_hcd_irq
  *
  * This function is called from the interrupt handler in c67x00-drv.c
  */
 static void c67x00_hcd_irq(struct c67x00_sie *sie, u16 int_status, u16 msg)
 {
 	struct c67x00_hcd *c67x00 = sie->private_data;
 	struct usb_hcd *hcd = c67x00_hcd_to_hcd(c67x00);

 	/* Handle sie message flags */
 	if (msg) {
 		if (msg & HUSB_TDListDone)
 			c67x00_sched_kick(c67x00);
 		else
 			dev_warn(c67x00_hcd_dev(c67x00),
 				 "Unknown SIE msg flag(s): 0x%04x\n", msg);
 	}

 	if (unlikely(hcd->state == HC_STATE_HALT))
 		return;

 	if (!HCD_HW_ACCESSIBLE(hcd))
 		return;

 	/* Handle Start of frame events */
 	if (int_status & SOFEOP_FLG(sie->sie_num)) {
 		c67x00_ll_usb_clear_status(sie, SOF_EOP_IRQ_FLG);
 		c67x00_sched_kick(c67x00);
 	}
 }

 /**
  * c67x00_hcd_start: Host controller start hook
  */
 static int c67x00_hcd_start(struct usb_hcd *hcd)
 {
 	hcd->uses_new_polling = 1;
 	hcd->state = HC_STATE_RUNNING;
 	set_bit(HCD_FLAG_POLL_RH, &hcd->flags);

 	return 0;
 }

 /**
  * c67x00_hcd_stop: Host controller stop hook
  */
 static void c67x00_hcd_stop(struct usb_hcd *hcd)
 {
 	/* Nothing to do */
 }

 static int c67x00_hcd_get_frame(struct usb_hcd *hcd)
 {
 	struct c67x00_hcd *c67x00 = hcd_to_c67x00_hcd(hcd);
 	u16 temp_val;

 	dev_dbg(c67x00_hcd_dev(c67x00), "%s\n", __func__);
 	temp_val = c67x00_ll_husb_get_frame(c67x00->sie);
 	temp_val &= HOST_FRAME_MASK;
 	return temp_val ? (temp_val - 1) : HOST_FRAME_MASK;
 }

 static const struct hc_driver c67x00_hc_driver = {
 	.description	= "c67x00-hcd",
 	.product_desc	= "Cypress C67X00 Host Controller",
 	.hcd_priv_size	= sizeof(struct c67x00_hcd),
 	.flags		= HCD_USB11 | HCD_MEMORY,

 	/*
 	 * basic lifecycle operations
 	 */
 	.start		= c67x00_hcd_start,
 	.stop		= c67x00_hcd_stop,

 	/*
 	 * managing i/o requests and associated device resources
 	 */
 	.urb_enqueue	= c67x00_urb_enqueue,
 	.urb_dequeue	= c67x00_urb_dequeue,
 	.endpoint_disable = c67x00_endpoint_disable,

 	/*
 	 * scheduling support
 	 */
 	.get_frame_number = c67x00_hcd_get_frame,

 	/*
 	 * root hub support
 	 */
 	.hub_status_data = c67x00_hub_status_data,
 	.hub_control	= c67x00_hub_control,
 };

 /* ---------------------------------------------------------------------
  * Setup/Teardown routines
  */

 int c67x00_hcd_probe(struct c67x00_sie *sie)
 {
 	struct c67x00_hcd *c67x00;
 	struct usb_hcd *hcd;
 	unsigned long flags;
 	int retval;

 	if (usb_disabled())
 		return -ENODEV;

 	hcd = usb_create_hcd(&c67x00_hc_driver, sie_dev(sie), "c67x00_sie");
 	if (!hcd) {
 		retval = -ENOMEM;
 		goto err0;
 	}
 	c67x00 = hcd_to_c67x00_hcd(hcd);

 	spin_lock_init(&c67x00->lock);
 	c67x00->sie = sie;

 	INIT_LIST_HEAD(&c67x00->list[PIPE_ISOCHRONOUS]);
 	INIT_LIST_HEAD(&c67x00->list[PIPE_INTERRUPT]);
 	INIT_LIST_HEAD(&c67x00->list[PIPE_CONTROL]);
 	INIT_LIST_HEAD(&c67x00->list[PIPE_BULK]);
 	c67x00->urb_count = 0;
 	INIT_LIST_HEAD(&c67x00->td_list);
 	c67x00->td_base_addr = CY_HCD_BUF_ADDR + SIE_TD_OFFSET(sie->sie_num);
 	c67x00->buf_base_addr = CY_HCD_BUF_ADDR + SIE_BUF_OFFSET(sie->sie_num);
 	c67x00->max_frame_bw = MAX_FRAME_BW_STD;

 	c67x00_ll_husb_init_host_port(sie);

 	init_completion(&c67x00->endpoint_disable);
 	retval = c67x00_sched_start_scheduler(c67x00);
 	if (retval)
 		goto err1;

 	retval = usb_add_hcd(hcd, 0, 0);
 	if (retval) {
 		dev_dbg(sie_dev(sie), "%s: usb_add_hcd returned %d\n",
 			__func__, retval);
 		goto err2;
 	}

 	device_wakeup_enable(hcd->self.controller);

 	spin_lock_irqsave(&sie->lock, flags);
 	sie->private_data = c67x00;
 	sie->irq = c67x00_hcd_irq;
 	spin_unlock_irqrestore(&sie->lock, flags);

 	return retval;

  err2:
 	c67x00_sched_stop_scheduler(c67x00);
  err1:
 	usb_put_hcd(hcd);
  err0:
 	return retval;
 }

 /* may be called with controller, bus, and devices active */
 void c67x00_hcd_remove(struct c67x00_sie *sie)
 {
 	struct c67x00_hcd *c67x00 = sie->private_data;
 	struct usb_hcd *hcd = c67x00_hcd_to_hcd(c67x00);

 	c67x00_sched_stop_scheduler(c67x00);
 	usb_remove_hcd(hcd);
 	usb_put_hcd(hcd);
 }
	// SPDX-License-Identifier: GPL-2.0+
	/*
	* c67x00-hcd.c: Cypress C67X00 USB Host Controller Driver
	*
	* Copyright (C) 2006-2008 Barco N.V.
	* Derived from the Cypress cy7c67200/300 ezusb linux driver and
	* based on multiple host controller drivers inside the linux kernel.
	*/

	#include <linux/device.h>
	#include <linux/platform_device.h>
	#include <linux/usb.h>

	#include "c67x00.h"
	#include "c67x00-hcd.h"

	/* --------------------------------------------------------------------------
	* Root Hub Support
	*/

	static __u8 c67x00_hub_des[] = {
	0x09, /* __u8 bLength; */
	USB_DT_HUB, /* __u8 bDescriptorType; Hub-descriptor */
	0x02, /* __u8 bNbrPorts; */
	0x00, /* __u16 wHubCharacteristics; */
	0x00, /* (per-port OC, no power switching) */
	0x32, /* __u8 bPwrOn2pwrGood; 2ms */
	0x00, /* __u8 bHubContrCurrent; 0 mA */
	0x00, /* __u8 DeviceRemovable; 7 Ports max */
	0xff, /* __u8 PortPwrCtrlMask; 7 ports max */
	};

	static void c67x00_hub_reset_host_port(struct c67x00_sie *sie, int port)
	{
	struct c67x00_hcd *c67x00 = sie->private_data;
	unsigned long flags;

	c67x00_ll_husb_reset(sie, port);

	spin_lock_irqsave(&c67x00->lock, flags);
	c67x00_ll_husb_reset_port(sie, port);
	spin_unlock_irqrestore(&c67x00->lock, flags);

	c67x00_ll_set_husb_eot(sie->dev, DEFAULT_EOT);
	}

	static int c67x00_hub_status_data(struct usb_hcd hcd, char buf)
	{
	struct c67x00_hcd *c67x00 = hcd_to_c67x00_hcd(hcd);
	struct c67x00_sie *sie = c67x00->sie;
	u16 status;
	int i;

	*buf = 0;
	status = c67x00_ll_usb_get_status(sie);
	for (i = 0; i < C67X00_PORTS; i++)
	if (status & PORT_CONNECT_CHANGE(i))
	*buf \|= (1 << i);

	/* bit 0 denotes hub change, b1..n port change */
	*buf <<= 1;

	return !!*buf;
	}

	static int c67x00_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
	u16 wIndex, char *buf, u16 wLength)
	{
	struct c67x00_hcd *c67x00 = hcd_to_c67x00_hcd(hcd);
	struct c67x00_sie *sie = c67x00->sie;
	u16 status, usb_status;
	int len = 0;
	unsigned int port = wIndex-1;
	u16 wPortChange, wPortStatus;

	switch (typeReq) {

	case GetHubStatus:
	(__le32 ) buf = cpu_to_le32(0);
	len = 4; /* hub power */
	break;

	case GetPortStatus:
	if (wIndex > C67X00_PORTS)
	return -EPIPE;

	status = c67x00_ll_usb_get_status(sie);
	usb_status = c67x00_ll_get_usb_ctl(sie);

	wPortChange = 0;
	if (status & PORT_CONNECT_CHANGE(port))
	wPortChange \|= USB_PORT_STAT_C_CONNECTION;

	wPortStatus = USB_PORT_STAT_POWER;
	if (!(status & PORT_SE0_STATUS(port)))
	wPortStatus \|= USB_PORT_STAT_CONNECTION;
	if (usb_status & LOW_SPEED_PORT(port)) {
	wPortStatus \|= USB_PORT_STAT_LOW_SPEED;
	c67x00->low_speed_ports \|= (1 << port);
	} else
	c67x00->low_speed_ports &= ~(1 << port);

	if (usb_status & SOF_EOP_EN(port))
	wPortStatus \|= USB_PORT_STAT_ENABLE;

	(__le16 ) buf = cpu_to_le16(wPortStatus);
	(__le16 ) (buf + 2) = cpu_to_le16(wPortChange);
	len = 4;
	break;

	case SetHubFeature: /* We don't implement these */
	case ClearHubFeature:
	switch (wValue) {
	case C_HUB_OVER_CURRENT:
	case C_HUB_LOCAL_POWER:
	len = 0;
	break;

	default:
	return -EPIPE;
	}
	break;

	case SetPortFeature:
	if (wIndex > C67X00_PORTS)
	return -EPIPE;

	switch (wValue) {
	case USB_PORT_FEAT_SUSPEND:
	dev_dbg(c67x00_hcd_dev(c67x00),
	"SetPortFeature %d (SUSPEND)\n", port);
	len = 0;
	break;

	case USB_PORT_FEAT_RESET:
	c67x00_hub_reset_host_port(sie, port);
	len = 0;
	break;

	case USB_PORT_FEAT_POWER:
	/* Power always enabled */
	len = 0;
	break;

	default:
	dev_dbg(c67x00_hcd_dev(c67x00),
	"%s: SetPortFeature %d (0x%04x) Error!\n",
	__func__, port, wValue);
	return -EPIPE;
	}
	break;

	case ClearPortFeature:
	if (wIndex > C67X00_PORTS)
	return -EPIPE;

	switch (wValue) {
	case USB_PORT_FEAT_ENABLE:
	/* Reset the port so that the c67x00 also notices the
	* disconnect */
	c67x00_hub_reset_host_port(sie, port);
	len = 0;
	break;

	case USB_PORT_FEAT_C_ENABLE:
	dev_dbg(c67x00_hcd_dev(c67x00),
	"ClearPortFeature (%d): C_ENABLE\n", port);
	len = 0;
	break;

	case USB_PORT_FEAT_SUSPEND:
	dev_dbg(c67x00_hcd_dev(c67x00),
	"ClearPortFeature (%d): SUSPEND\n", port);
	len = 0;
	break;

	case USB_PORT_FEAT_C_SUSPEND:
	dev_dbg(c67x00_hcd_dev(c67x00),
	"ClearPortFeature (%d): C_SUSPEND\n", port);
	len = 0;
	break;

	case USB_PORT_FEAT_POWER:
	dev_dbg(c67x00_hcd_dev(c67x00),
	"ClearPortFeature (%d): POWER\n", port);
	return -EPIPE;

	case USB_PORT_FEAT_C_CONNECTION:
	c67x00_ll_usb_clear_status(sie,
	PORT_CONNECT_CHANGE(port));
	len = 0;
	break;

	case USB_PORT_FEAT_C_OVER_CURRENT:
	dev_dbg(c67x00_hcd_dev(c67x00),
	"ClearPortFeature (%d): OVER_CURRENT\n", port);
	len = 0;
	break;

	case USB_PORT_FEAT_C_RESET:
	dev_dbg(c67x00_hcd_dev(c67x00),
	"ClearPortFeature (%d): C_RESET\n", port);
	len = 0;
	break;

	default:
	dev_dbg(c67x00_hcd_dev(c67x00),
	"%s: ClearPortFeature %d (0x%04x) Error!\n",
	__func__, port, wValue);
	return -EPIPE;
	}
	break;

	case GetHubDescriptor:
	len = min_t(unsigned int, sizeof(c67x00_hub_des), wLength);
	memcpy(buf, c67x00_hub_des, len);
	break;

	default:
	dev_dbg(c67x00_hcd_dev(c67x00), "%s: unknown\n", __func__);
	return -EPIPE;
	}

	return 0;
	}

	/* ---------------------------------------------------------------------
	* Main part of host controller driver
	*/

	/**
	* c67x00_hcd_irq
	*
	* This function is called from the interrupt handler in c67x00-drv.c
	*/
	static void c67x00_hcd_irq(struct c67x00_sie *sie, u16 int_status, u16 msg)
	{
	struct c67x00_hcd *c67x00 = sie->private_data;
	struct usb_hcd *hcd = c67x00_hcd_to_hcd(c67x00);

	/* Handle sie message flags */
	if (msg) {
	if (msg & HUSB_TDListDone)
	c67x00_sched_kick(c67x00);
	else
	dev_warn(c67x00_hcd_dev(c67x00),
	"Unknown SIE msg flag(s): 0x%04x\n", msg);
	}

	if (unlikely(hcd->state == HC_STATE_HALT))
	return;

	if (!HCD_HW_ACCESSIBLE(hcd))
	return;

	/* Handle Start of frame events */
	if (int_status & SOFEOP_FLG(sie->sie_num)) {
	c67x00_ll_usb_clear_status(sie, SOF_EOP_IRQ_FLG);
	c67x00_sched_kick(c67x00);
	}
	}

	/**
	* c67x00_hcd_start: Host controller start hook
	*/
	static int c67x00_hcd_start(struct usb_hcd *hcd)
	{
	hcd->uses_new_polling = 1;
	hcd->state = HC_STATE_RUNNING;
	set_bit(HCD_FLAG_POLL_RH, &hcd->flags);

	return 0;
	}

	/**
	* c67x00_hcd_stop: Host controller stop hook
	*/
	static void c67x00_hcd_stop(struct usb_hcd *hcd)
	{
	/* Nothing to do */
	}

	static int c67x00_hcd_get_frame(struct usb_hcd *hcd)
	{
	struct c67x00_hcd *c67x00 = hcd_to_c67x00_hcd(hcd);
	u16 temp_val;

	dev_dbg(c67x00_hcd_dev(c67x00), "%s\n", __func__);
	temp_val = c67x00_ll_husb_get_frame(c67x00->sie);
	temp_val &= HOST_FRAME_MASK;
	return temp_val ? (temp_val - 1) : HOST_FRAME_MASK;
	}

	static const struct hc_driver c67x00_hc_driver = {
	.description = "c67x00-hcd",
	.product_desc = "Cypress C67X00 Host Controller",
	.hcd_priv_size = sizeof(struct c67x00_hcd),
	.flags = HCD_USB11 \| HCD_MEMORY,

	/*
	* basic lifecycle operations
	*/
	.start = c67x00_hcd_start,
	.stop = c67x00_hcd_stop,

	/*
	* managing i/o requests and associated device resources
	*/
	.urb_enqueue = c67x00_urb_enqueue,
	.urb_dequeue = c67x00_urb_dequeue,
	.endpoint_disable = c67x00_endpoint_disable,

	/*
	* scheduling support
	*/
	.get_frame_number = c67x00_hcd_get_frame,

	/*
	* root hub support
	*/
	.hub_status_data = c67x00_hub_status_data,
	.hub_control = c67x00_hub_control,
	};

	/* ---------------------------------------------------------------------
	* Setup/Teardown routines
	*/

	int c67x00_hcd_probe(struct c67x00_sie *sie)
	{
	struct c67x00_hcd *c67x00;
	struct usb_hcd *hcd;
	unsigned long flags;
	int retval;

	if (usb_disabled())
	return -ENODEV;

	hcd = usb_create_hcd(&c67x00_hc_driver, sie_dev(sie), "c67x00_sie");
	if (!hcd) {
	retval = -ENOMEM;
	goto err0;
	}
	c67x00 = hcd_to_c67x00_hcd(hcd);

	spin_lock_init(&c67x00->lock);
	c67x00->sie = sie;

	INIT_LIST_HEAD(&c67x00->list[PIPE_ISOCHRONOUS]);
	INIT_LIST_HEAD(&c67x00->list[PIPE_INTERRUPT]);
	INIT_LIST_HEAD(&c67x00->list[PIPE_CONTROL]);
	INIT_LIST_HEAD(&c67x00->list[PIPE_BULK]);
	c67x00->urb_count = 0;
	INIT_LIST_HEAD(&c67x00->td_list);
	c67x00->td_base_addr = CY_HCD_BUF_ADDR + SIE_TD_OFFSET(sie->sie_num);
	c67x00->buf_base_addr = CY_HCD_BUF_ADDR + SIE_BUF_OFFSET(sie->sie_num);
	c67x00->max_frame_bw = MAX_FRAME_BW_STD;

	c67x00_ll_husb_init_host_port(sie);

	init_completion(&c67x00->endpoint_disable);
	retval = c67x00_sched_start_scheduler(c67x00);
	if (retval)
	goto err1;

	retval = usb_add_hcd(hcd, 0, 0);
	if (retval) {
	dev_dbg(sie_dev(sie), "%s: usb_add_hcd returned %d\n",
	__func__, retval);
	goto err2;
	}

	device_wakeup_enable(hcd->self.controller);

	spin_lock_irqsave(&sie->lock, flags);
	sie->private_data = c67x00;
	sie->irq = c67x00_hcd_irq;
	spin_unlock_irqrestore(&sie->lock, flags);

	return retval;

	err2:
	c67x00_sched_stop_scheduler(c67x00);
	err1:
	usb_put_hcd(hcd);
	err0:
	return retval;
	}

	/* may be called with controller, bus, and devices active */
	void c67x00_hcd_remove(struct c67x00_sie *sie)
	{
	struct c67x00_hcd *c67x00 = sie->private_data;
	struct usb_hcd *hcd = c67x00_hcd_to_hcd(c67x00);

	c67x00_sched_stop_scheduler(c67x00);
	usb_remove_hcd(hcd);
	usb_put_hcd(hcd);
	}