/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License (the "License").
 * You may not use this file except in compliance with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */
/*
 * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
 */

/*
 * EHCI Host Controller Driver (EHCI)
 *
 * The EHCI driver is a software driver which interfaces to the Universal
 * Serial Bus layer (USBA) and the Host Controller (HC). The interface to
 * the Host Controller is defined by the EHCI Host Controller Interface.
 *
 * This module contains the code for root hub related functions.
 *
 * NOTE:
 *
 * ONE_XFER is not supported on root hub interrupt polling
 */

#include <sys/usb/hcd/ehci/ehcid.h>
#include <sys/usb/hcd/ehci/ehci_util.h>
#include <sys/usb/usba/usba_types.h>

/* Static function prototypes */
static int      ehci_handle_set_clear_port_feature(
                                ehci_state_t            *ehcip,
                                uchar_t                 bRequest,
                                uint16_t                wValue,
                                uint16_t                port);
static void     ehci_handle_port_power(
                                ehci_state_t            *ehcip,
                                uint16_t                port,
                                uint_t                  on);
static void     ehci_handle_port_enable(
                                ehci_state_t            *ehcip,
                                uint16_t                port,
                                uint_t                  on);
static void     ehci_handle_clrchng_port_enable(
                                ehci_state_t            *ehcip,
                                uint16_t                port);
static void     ehci_handle_port_suspend(
                                ehci_state_t            *ehcip,
                                uint16_t                port,
                                uint_t                  on);
static void     ehci_handle_clrchng_port_suspend(
                                ehci_state_t            *ehcip,
                                uint16_t                port);
static void     ehci_handle_port_reset(
                                ehci_state_t            *ehcip,
                                uint16_t                port);
static void     ehci_root_hub_reset_occured(
                                ehci_state_t            *ehcip);
static void     ehci_handle_complete_port_reset(
                                ehci_state_t            *ehcip,
                                uint16_t                port);
static void     ehci_handle_clear_port_connection(
                                ehci_state_t            *ehcip,
                                uint16_t                port);
static void     ehci_handle_clrchng_port_over_current(
                                ehci_state_t            *ehcip,
                                uint16_t                port);
static void     ehci_handle_get_port_status(
                                ehci_state_t            *ehcip,
                                uint16_t                port);
static void     ehci_handle_get_hub_descriptor(
                                ehci_state_t            *ehcip);
static void     ehci_handle_get_hub_status(
                                ehci_state_t            *ehcip);
static void     ehci_handle_get_device_status(
                                ehci_state_t            *ehcip);
static uint_t   ehci_get_root_hub_port_status(
                                ehci_state_t            *ehcip,
                                uint16_t                port);
static int      ehci_is_port_owner(
                                ehci_state_t            *ehcip,
                                uint16_t                port);
static int      ehci_root_hub_allocate_intr_pipe_resource(
                                ehci_state_t            *ehcip,
                                usb_flags_t             flags);
static void     ehci_root_hub_intr_pipe_cleanup(
                                ehci_state_t            *ehcip,
                                usb_cr_t                completion_reason);
static void     ehci_handle_root_hub_status_change(void *arg);
static void     ehci_root_hub_hcdi_callback(
                                usba_pipe_handle_data_t *ph,
                                usb_cr_t                completion_reason);


/*
 * ehci_init_root_hub:
 *
 * Initialize the root hub
 */
int
ehci_init_root_hub(ehci_state_t *ehcip)
{
        usb_hub_descr_t         *root_hub_descr =
            &ehcip->ehci_root_hub.rh_descr;
        uint_t                  i, length, port_state;
        uint32_t                capability;

        USB_DPRINTF_L4(PRINT_MASK_ROOT_HUB, ehcip->ehci_log_hdl,
            "ehci_init_root_hub:");

        /* Read the EHCI capability register */
        capability = Get_Cap(ehci_hcs_params);

        /*
         * Build the Root hub descriptor by looking EHCI capability
         * and operational registers.
         */
        root_hub_descr->bDescriptorType = ROOT_HUB_DESCRIPTOR_TYPE;

        if ((capability & EHCI_HCS_NUM_PORTS) > EHCI_MAX_RH_PORTS) {

                USB_DPRINTF_L2(PRINT_MASK_ROOT_HUB, ehcip->ehci_log_hdl,
                    "ehci_init_root_hub: Invalid no of root hub ports 0x%x",
                    capability & EHCI_HCS_NUM_PORTS);

                return (USB_FAILURE);
        }

        /* Obtain the number of downstream ports */
        root_hub_descr->bNbrPorts = capability & EHCI_HCS_NUM_PORTS;

        length = root_hub_descr->bNbrPorts / 8;

        if (length) {
                root_hub_descr->bDescLength = 7 + (2 * (length + 1));
        } else {
                root_hub_descr->bDescLength = ROOT_HUB_DESCRIPTOR_LENGTH;
        }

        /*
         * Obtain the number of Classic or Companion USB 1.1 (OHCI/UHCI)
         * Host Controllers information.
         */
        ehcip->ehci_root_hub.rh_companion_controllers = (capability &
            EHCI_HCS_NUM_COMP_CTRLS) >> EHCI_HCS_NUM_COMP_CTRL_SHIFT;

        /*
         * Determine the Power Switching Mode
         *
         * EHCI Specification, root hub supports either no power switching
         * individual port power switching. Also determine the Over-current
         * Protection Mode.
         */
        if (capability & EHCI_HCS_PORT_POWER_CONTROL) {
                /* Each port is powered individually */
                root_hub_descr-> wHubCharacteristics =
                    HUB_CHARS_INDIVIDUAL_PORT_POWER;

                /* Assume individual overcurrent reporting */
                root_hub_descr->wHubCharacteristics |=
                    HUB_CHARS_INDIV_OVER_CURRENT;

                /* Each port will start off in the POWERED_OFF mode */
                port_state = POWERED_OFF;
        } else {
                /* The ports are powered when the ctlr is powered */
                root_hub_descr->
                    wHubCharacteristics = HUB_CHARS_NO_POWER_SWITCHING;

                /* Assume no overcurrent reporting */
                root_hub_descr->wHubCharacteristics |=
                    HUB_CHARS_NO_OVER_CURRENT;

                port_state = DISCONNECTED;
        }

        /* Look at the port indicator information */
        if (capability & EHCI_HCS_PORT_INDICATOR) {
                root_hub_descr->wHubCharacteristics |= HUB_CHARS_PORT_INDICATOR;
        }

        /*
         * Obtain the power on to power good time of the ports.
         *
         * Assume: Zero for this field.
         */
        root_hub_descr->bPwrOn2PwrGood = 2;

        USB_DPRINTF_L3(PRINT_MASK_ROOT_HUB, ehcip->ehci_log_hdl,
            "Power on to power good %d", root_hub_descr->bPwrOn2PwrGood);

        /* Indicate if the device is removable */
        root_hub_descr->DeviceRemovable = 0;

        /* Set PortPowerControlMask to zero */
        root_hub_descr->PortPwrCtrlMask = 0;

        /* Set the state of each port and initialize the status */
        for (i = 0; i < root_hub_descr->bNbrPorts; i++) {

                /* Initilize state/status of each root hub port */
                ehcip->ehci_root_hub.rh_port_state[i] = port_state;
                ehcip->ehci_root_hub.rh_port_status[i] = 0;
        }

        return (USB_SUCCESS);
}


/*
 * ehci_load_root_hub_driver:
 *
 * Attach the root hub
 */
static usb_dev_descr_t ehci_root_hub_device_descriptor = {
        0x12,           /* bLength */
        0x01,           /* bDescriptorType, Device */
        0x200,          /* bcdUSB, v2.0 */
        0x09,           /* bDeviceClass */
        0x00,           /* bDeviceSubClass */
        0x01,           /* bDeviceProtocol */
        0x40,           /* bMaxPacketSize0 */
        0x00,           /* idVendor */
        0x00,           /* idProduct */
        0x00,           /* bcdDevice */
        0x00,           /* iManufacturer */
        0x00,           /* iProduct */
        0x00,           /* iSerialNumber */
        0x01            /* bNumConfigurations */
};

static uchar_t ehci_root_hub_config_descriptor[] = {
        /* One configuartion */
        0x09,           /* bLength */
        0x02,           /* bDescriptorType, Configuartion */
        0x19, 0x00,     /* wTotalLength */
        0x01,           /* bNumInterfaces */
        0x01,           /* bConfigurationValue */
        0x00,           /* iConfiguration */
        0x40,           /* bmAttributes */
        0x00,           /* MaxPower */

        /* One Interface */
        0x09,           /* bLength */
        0x04,           /* bDescriptorType, Interface */
        0x00,           /* bInterfaceNumber */
        0x00,           /* bAlternateSetting */
        0x01,           /* bNumEndpoints */
        0x09,           /* bInterfaceClass */
        0x01,           /* bInterfaceSubClass */
        0x00,           /* bInterfaceProtocol */
        0x00,           /* iInterface */

        /* One Endpoint (status change endpoint) */
        0x07,           /* bLength */
        0x05,           /* bDescriptorType, Endpoint */
        0x81,           /* bEndpointAddress */
        0x03,           /* bmAttributes */
        0x01, 0x00,     /* wMaxPacketSize, 1 +  (EHCI_MAX_RH_PORTS / 8) */
        0xff            /* bInterval */
};

int
ehci_load_root_hub_driver(ehci_state_t  *ehcip)
{
        USB_DPRINTF_L4(PRINT_MASK_ROOT_HUB, ehcip->ehci_log_hdl,
            "ehci_load_root_hub_driver:");

        return (usba_hubdi_bind_root_hub(ehcip->ehci_dip,
            ehci_root_hub_config_descriptor,
            sizeof (ehci_root_hub_config_descriptor),
            &ehci_root_hub_device_descriptor));
}


/*
 * ehci_unload_root_hub_driver:
 */
int
ehci_unload_root_hub_driver(ehci_state_t        *ehcip)
{
        USB_DPRINTF_L4(PRINT_MASK_ROOT_HUB, ehcip->ehci_log_hdl,
            "ehci_unload_root_hub_driver:");

        return (usba_hubdi_unbind_root_hub(ehcip->ehci_dip));
}


/*
 * ehci_handle_root_hub_pipe_open:
 *
 * Handle opening of control and interrupt pipes on root hub.
 */
/* ARGSUSED */
int
ehci_handle_root_hub_pipe_open(
        usba_pipe_handle_data_t *ph,
        usb_flags_t             usb_flags)
{
        ehci_state_t            *ehcip = ehci_obtain_state(
            ph->p_usba_device->usb_root_hub_dip);
        usb_ep_descr_t          *eptd = &ph->p_ep;

        USB_DPRINTF_L4(PRINT_MASK_ROOT_HUB, ehcip->ehci_log_hdl,
            "ehci_handle_root_hub_pipe_open: Root hub pipe open");

        ASSERT(mutex_owned(&ehcip->ehci_int_mutex));

        switch (eptd->bmAttributes & USB_EP_ATTR_MASK) {
        case USB_EP_ATTR_CONTROL:
                /* Save control pipe handle */
                ehcip->ehci_root_hub.rh_ctrl_pipe_handle = ph;

                /* Set state of the root hub control pipe as idle */
                ehcip->ehci_root_hub.rh_ctrl_pipe_state = EHCI_PIPE_STATE_IDLE;

                ehcip->ehci_root_hub.rh_curr_ctrl_reqp = NULL;

                USB_DPRINTF_L4(PRINT_MASK_ROOT_HUB, ehcip->ehci_log_hdl,
                    "ehci_handle_root_hub_pipe_open: Root hub control "
                    "pipe open succeeded");

                break;
        case USB_EP_ATTR_INTR:
                /* Save interrupt pipe handle */
                ehcip->ehci_root_hub.rh_intr_pipe_handle = ph;

                /* Set state of the root hub interrupt pipe as idle */
                ehcip->ehci_root_hub.rh_intr_pipe_state = EHCI_PIPE_STATE_IDLE;

                ehcip->ehci_root_hub.rh_client_intr_reqp = NULL;

                ehcip->ehci_root_hub.rh_curr_intr_reqp = NULL;

                USB_DPRINTF_L4(PRINT_MASK_ROOT_HUB, ehcip->ehci_log_hdl,
                    "ehci_handle_root_hub_pipe_open: Root hub interrupt "
                    "pipe open succeeded");

                break;
        default:
                USB_DPRINTF_L2(PRINT_MASK_ROOT_HUB, ehcip->ehci_log_hdl,
                    "ehci_handle_root_hub_pipe_open: Root hub pipe open"
                    "failed");

                return (USB_FAILURE);
        }

        ehcip->ehci_open_pipe_count++;

        return (USB_SUCCESS);
}


/*
 * ehci_handle_root_hub_pipe_close:
 *
 * Handle closing of control and interrupt pipes on root hub.
 */
/* ARGSUSED */
int
ehci_handle_root_hub_pipe_close(usba_pipe_handle_data_t *ph)
{
        ehci_state_t            *ehcip = ehci_obtain_state(
            ph->p_usba_device->usb_root_hub_dip);
        usb_ep_descr_t          *eptd = &ph->p_ep;

        USB_DPRINTF_L4(PRINT_MASK_ROOT_HUB, ehcip->ehci_log_hdl,
            "ehci_handle_root_hub_pipe_close: Root hub pipe close");

        ASSERT(mutex_owned(&ehcip->ehci_int_mutex));

        switch (eptd->bmAttributes & USB_EP_ATTR_MASK) {
        case USB_EP_ATTR_CONTROL:
                ASSERT(ehcip->ehci_root_hub.
                    rh_ctrl_pipe_state != EHCI_PIPE_STATE_CLOSE);

                /* Set state of the root hub control pipe as close */
                ehcip->ehci_root_hub.rh_ctrl_pipe_state = EHCI_PIPE_STATE_CLOSE;

                /* Set root hub control pipe handle to null */
                ehcip->ehci_root_hub.rh_ctrl_pipe_handle = NULL;

                USB_DPRINTF_L4(PRINT_MASK_ROOT_HUB, ehcip->ehci_log_hdl,
                    "ehci_handle_root_hub_pipe_close: "
                    "Root hub control pipe close succeeded");
                break;
        case USB_EP_ATTR_INTR:
                ASSERT((eptd->bEndpointAddress & USB_EP_NUM_MASK) == 1);

                ASSERT(ehcip->ehci_root_hub.
                    rh_intr_pipe_state != EHCI_PIPE_STATE_CLOSE);

                /* Set state of the root hub interrupt pipe as close */
                ehcip->ehci_root_hub.rh_intr_pipe_state = EHCI_PIPE_STATE_CLOSE;

                /* Do interrupt pipe cleanup */
                ehci_root_hub_intr_pipe_cleanup(ehcip, USB_CR_PIPE_CLOSING);

                /* Set root hub interrupt pipe handle to null */
                ehcip->ehci_root_hub.rh_intr_pipe_handle = NULL;

                USB_DPRINTF_L4(PRINT_MASK_ROOT_HUB, ehcip->ehci_log_hdl,
                    "ehci_handle_root_hub_pipe_close: "
                    "Root hub interrupt pipe close succeeded");

                break;
        default:
                USB_DPRINTF_L2(PRINT_MASK_ROOT_HUB, ehcip->ehci_log_hdl,
                    "ehci_handle_root_hub_pipe_close: "
                    "Root hub pipe close failed");

                return (USB_FAILURE);
        }

        ehcip->ehci_open_pipe_count--;

        return (USB_SUCCESS);
}


/*
 * ehci_handle_root_hub_pipe_reset:
 *
 * Handle resetting of control and interrupt pipes on root hub.
 */
/* ARGSUSED */
int
ehci_handle_root_hub_pipe_reset(
        usba_pipe_handle_data_t *ph,
        usb_flags_t             usb_flags)
{
        ehci_state_t            *ehcip = ehci_obtain_state(
            ph->p_usba_device->usb_root_hub_dip);
        usb_ep_descr_t          *eptd = &ph->p_ep;
        int                     error = USB_SUCCESS;

        USB_DPRINTF_L4(PRINT_MASK_ROOT_HUB, ehcip->ehci_log_hdl,
            "ehci_handle_root_hub_pipe_reset: Root hub pipe reset");

        mutex_enter(&ehcip->ehci_int_mutex);

        switch (eptd->bmAttributes & USB_EP_ATTR_MASK) {
        case USB_EP_ATTR_CONTROL:
                ehcip->ehci_root_hub.rh_ctrl_pipe_state = EHCI_PIPE_STATE_IDLE;

                USB_DPRINTF_L4(PRINT_MASK_ROOT_HUB, ehcip->ehci_log_hdl,
                    "ehci_handle_root_hub_pipe_reset: Pipe reset"
                    "for the root hub control pipe successful");

                break;
        case USB_EP_ATTR_INTR:
                ASSERT((eptd->bEndpointAddress & USB_EP_NUM_MASK) == 1);

                if ((ehcip->ehci_root_hub.rh_client_intr_reqp) &&
                    (ehcip->ehci_root_hub.rh_intr_pipe_state !=
                    EHCI_PIPE_STATE_IDLE)) {

                        ehcip->ehci_root_hub.
                            rh_intr_pipe_state = EHCI_PIPE_STATE_RESET;

                        /* Do interrupt pipe cleanup */
                        ehci_root_hub_intr_pipe_cleanup(
                            ehcip, USB_CR_PIPE_RESET);
                }

                ASSERT(ehcip->ehci_root_hub.
                    rh_intr_pipe_state == EHCI_PIPE_STATE_IDLE);

                USB_DPRINTF_L4(PRINT_MASK_ROOT_HUB, ehcip->ehci_log_hdl,
                    "ehci_handle_root_hub_pipe_reset: "
                    "Pipe reset for root hub interrupt pipe successful");

                break;
        default:
                USB_DPRINTF_L2(PRINT_MASK_ROOT_HUB, ehcip->ehci_log_hdl,
                    "ehci_handle_root_hub_pipe_reset: "
                    "Root hub pipe reset failed");

                error = USB_FAILURE;
                break;
        }

        mutex_exit(&ehcip->ehci_int_mutex);

        return (error);
}


/*
 * ehci_handle_root_hub_request:
 *
 * Intercept a root hub request. Handle the  root hub request through the
 * registers
 */
/* ARGSUSED */
int
ehci_handle_root_hub_request(
        ehci_state_t            *ehcip,
        usba_pipe_handle_data_t *ph,
        usb_ctrl_req_t          *ctrl_reqp)
{
        uchar_t                 bmRequestType = ctrl_reqp->ctrl_bmRequestType;
        uchar_t                 bRequest = ctrl_reqp->ctrl_bRequest;
        uint16_t                wValue = ctrl_reqp->ctrl_wValue;
        uint16_t                wIndex = ctrl_reqp->ctrl_wIndex;
        uint16_t                wLength = ctrl_reqp->ctrl_wLength;
        mblk_t                  *data = ctrl_reqp->ctrl_data;
        uint16_t                port = wIndex - 1;
        usb_cr_t                completion_reason;
        int                     error = USB_SUCCESS;

        USB_DPRINTF_L4(PRINT_MASK_ROOT_HUB, ehcip->ehci_log_hdl,
            "ehci_handle_root_hub_request: 0x%x 0x%x 0x%x 0x%x 0x%x 0x%p",
            bmRequestType, bRequest, wValue, wIndex, wLength, (void *)data);

        mutex_enter(&ehcip->ehci_int_mutex);

        if (ehcip->ehci_root_hub.
            rh_ctrl_pipe_state != EHCI_PIPE_STATE_IDLE) {

                USB_DPRINTF_L2(PRINT_MASK_ROOT_HUB, ehcip->ehci_log_hdl,
                    "ehci_handle_root_hub_request: Pipe is not idle");

                mutex_exit(&ehcip->ehci_int_mutex);

                return (USB_FAILURE);
        }

        /* Save the current control request pointer */
        ehcip->ehci_root_hub.rh_curr_ctrl_reqp = ctrl_reqp;

        /* Set pipe state to active */
        ehcip->ehci_root_hub.rh_ctrl_pipe_state = EHCI_PIPE_STATE_ACTIVE;

        mutex_exit(&ehcip->ehci_int_mutex);

        switch (bmRequestType) {
        case HUB_GET_DEVICE_STATUS_TYPE:
                ehci_handle_get_device_status(ehcip);
                break;
        case HUB_HANDLE_PORT_FEATURE_TYPE:
                error = ehci_handle_set_clear_port_feature(ehcip,
                    bRequest, wValue, port);
                break;
        case HUB_GET_PORT_STATUS_TYPE:
                ehci_handle_get_port_status(ehcip, port);
                break;
        case HUB_CLASS_REQ_TYPE:
                switch (bRequest) {
                case USB_REQ_GET_STATUS:
                        ehci_handle_get_hub_status(ehcip);
                        break;
                case USB_REQ_GET_DESCR:
                        ehci_handle_get_hub_descriptor(ehcip);
                        break;
                default:
                        USB_DPRINTF_L2(PRINT_MASK_ROOT_HUB, ehcip->ehci_log_hdl,
                            "ehci_handle_root_hub_request:"
                            "Unsupported request 0x%x", bRequest);

                        error = USB_FAILURE;
                        break;
                }
                break;
        default:
                USB_DPRINTF_L2(PRINT_MASK_ROOT_HUB, ehcip->ehci_log_hdl,
                    "ehci_handle_root_hub_request: "
                    "Unsupported request 0x%x", bmRequestType);

                error = USB_FAILURE;
                break;
        }

        completion_reason = (error) ? USB_CR_NOT_SUPPORTED : USB_CR_OK;

        mutex_enter(&ehcip->ehci_int_mutex);
        ehci_root_hub_hcdi_callback(ph, completion_reason);
        mutex_exit(&ehcip->ehci_int_mutex);

        USB_DPRINTF_L4(PRINT_MASK_ROOT_HUB, ehcip->ehci_log_hdl,
            "ehci_handle_root_hub_request: error = %d", error);

        return (USB_SUCCESS);
}


/*
 * ehci_handle_set_clear_port_feature:
 */
static int
ehci_handle_set_clear_port_feature(
        ehci_state_t            *ehcip,
        uchar_t                 bRequest,
        uint16_t                wValue,
        uint16_t                port)
{
        int                     error = USB_SUCCESS;

        USB_DPRINTF_L4(PRINT_MASK_ROOT_HUB, ehcip->ehci_log_hdl,
            "ehci_handle_set_clear_port_feature: 0x%x 0x%x 0x%x",
            bRequest, wValue, port);

        switch (bRequest) {
        case USB_REQ_SET_FEATURE:
                switch (wValue) {
                case CFS_PORT_ENABLE:
                        ehci_handle_port_enable(ehcip, port, 1);
                        break;
                case CFS_PORT_SUSPEND:
                        ehci_handle_port_suspend(ehcip, port, 1);
                        break;
                case CFS_PORT_RESET:
                        ehci_handle_port_reset(ehcip, port);
                        break;
                case CFS_PORT_POWER:
                        ehci_handle_port_power(ehcip, port, 1);
                        break;
                default:
                        USB_DPRINTF_L2(PRINT_MASK_ROOT_HUB, ehcip->ehci_log_hdl,
                            "ehci_handle_set_clear_port_feature: "
                            "Unsupported request 0x%x 0x%x", bRequest, wValue);

                        error = USB_FAILURE;
                        break;
                }
                break;
        case USB_REQ_CLEAR_FEATURE:
                switch (wValue) {
                case CFS_PORT_ENABLE:
                        ehci_handle_port_enable(ehcip, port, 0);
                        break;
                case CFS_C_PORT_ENABLE:
                        ehci_handle_clrchng_port_enable(ehcip, port);
                        break;
                case CFS_PORT_SUSPEND:
                        ehci_handle_port_suspend(ehcip, port, 0);
                        break;
                case CFS_C_PORT_SUSPEND:
                        ehci_handle_clrchng_port_suspend(ehcip, port);
                        break;
                case CFS_C_PORT_RESET:
                        ehci_handle_complete_port_reset(ehcip, port);
                        break;
                case CFS_PORT_POWER:
                        ehci_handle_port_power(ehcip, port, 0);
                        break;
                case CFS_C_PORT_CONNECTION:
                        ehci_handle_clear_port_connection(ehcip, port);
                        break;
                case CFS_C_PORT_OVER_CURRENT:
                        ehci_handle_clrchng_port_over_current(ehcip, port);
                        break;
                default:
                        USB_DPRINTF_L2(PRINT_MASK_ROOT_HUB, ehcip->ehci_log_hdl,
                            "ehci_handle_set_clear_port_feature: "
                            "Unsupported request 0x%x 0x%x", bRequest, wValue);

                        error = USB_FAILURE;
                        break;
                }
                break;
        default:
                USB_DPRINTF_L2(PRINT_MASK_ROOT_HUB, ehcip->ehci_log_hdl,
                    "ehci_handle_set_clear_port_feature: "
                    "Unsupported request 0x%x 0x%x", bRequest, wValue);

                error = USB_FAILURE;
                break;
        }

        return (error);
}


/*
 * ehci_handle_port_power:
 *
 * Turn on a root hub port.
 */
static void
ehci_handle_port_power(
        ehci_state_t            *ehcip,
        uint16_t                port,
        uint_t                  on)
{
        uint_t                  port_status;
        ehci_root_hub_t         *rh;

        mutex_enter(&ehcip->ehci_int_mutex);

        port_status = Get_OpReg(ehci_rh_port_status[port]) &
            ~EHCI_RH_PORT_CLEAR_MASK;

        rh = &ehcip->ehci_root_hub;

        USB_DPRINTF_L4(PRINT_MASK_ROOT_HUB, ehcip->ehci_log_hdl,
            "ehci_handle_port_power: port = 0x%x status = 0x%x on = %d",
            port, port_status, on);

        /* Check port is owned by ehci */
        if (ehci_is_port_owner(ehcip, port) != USB_SUCCESS) {
                mutex_exit(&ehcip->ehci_int_mutex);

                return;
        }

        if (on) {
                /* See if the port power is already on */
                if (!(port_status & EHCI_RH_PORT_POWER)) {
                        /* Turn the port on */
                        Set_OpReg(ehci_rh_port_status[port],
                            port_status | EHCI_RH_PORT_POWER);
                }

                rh->rh_port_status[port] = 0;
                rh->rh_port_state[port] = DISCONNECTED;
        } else {
                /* See if the port power is already OFF */
                if (port_status & EHCI_RH_PORT_POWER) {
                        /* Turn-off the port */
                        Set_OpReg(ehci_rh_port_status[port],
                            port_status & ~EHCI_RH_PORT_POWER);
                }

                rh->rh_port_status[port] = 0;
                rh->rh_port_state[port] = POWERED_OFF;
        }

        USB_DPRINTF_L4(PRINT_MASK_ROOT_HUB, ehcip->ehci_log_hdl,
            "ehci_handle_port_power done: port = 0x%x status = 0x%x on = %d",
            port, Get_OpReg(ehci_rh_port_status[port]), on);

        mutex_exit(&ehcip->ehci_int_mutex);
}


/*
 * ehci_handle_port_enable:
 *
 * Handle port enable request.
 */
static void
ehci_handle_port_enable(
        ehci_state_t            *ehcip,
        uint16_t                port,
        uint_t                  on)
{
        uint_t                  port_status;

        mutex_enter(&ehcip->ehci_int_mutex);

        port_status = Get_OpReg(ehci_rh_port_status[port]) &
            ~EHCI_RH_PORT_CLEAR_MASK;

        USB_DPRINTF_L4(PRINT_MASK_ROOT_HUB, ehcip->ehci_log_hdl,
            "ehci_handle_port_enable: port = 0x%x, status = 0x%x",
            port, port_status);

        /* Check port is owned by ehci */
        if (ehci_is_port_owner(ehcip, port) != USB_SUCCESS) {
                mutex_exit(&ehcip->ehci_int_mutex);

                return;
        }

        if (on) {
                /* See if the port enable is already on */
                if (!(port_status & EHCI_RH_PORT_ENABLE)) {
                        /* Enable the port */
                        Set_OpReg(ehci_rh_port_status[port],
                            port_status | EHCI_RH_PORT_ENABLE);
                }
        } else {
                /* See if the port enable is already off */
                if (port_status & EHCI_RH_PORT_ENABLE) {
                        /* Disable the port */
                        Set_OpReg(ehci_rh_port_status[port],
                            port_status & ~EHCI_RH_PORT_ENABLE);
                }
        }

        mutex_exit(&ehcip->ehci_int_mutex);
}


/*
 * ehci_handle_clrchng_port_enable:
 *
 * Handle clear port enable change bit.
 */
static void
ehci_handle_clrchng_port_enable(
        ehci_state_t            *ehcip,
        uint16_t                port)
{
        uint_t                  port_status;

        mutex_enter(&ehcip->ehci_int_mutex);

        port_status = Get_OpReg(ehci_rh_port_status[port]) &
            ~EHCI_RH_PORT_CLEAR_MASK;

        USB_DPRINTF_L4(PRINT_MASK_ROOT_HUB, ehcip->ehci_log_hdl,
            "ehci_handle_port_enable: port = 0x%x, status = 0x%x",
            port, port_status);

        /* Check port is owned by ehci */
        if (ehci_is_port_owner(ehcip, port) != USB_SUCCESS) {
                mutex_exit(&ehcip->ehci_int_mutex);

                return;
        }

        /* Clear the PortEnableStatusChange Bit */
        Set_OpReg(ehci_rh_port_status[port],
            port_status | EHCI_RH_PORT_ENABLE_CHANGE);

        mutex_exit(&ehcip->ehci_int_mutex);
}


/*
 * ehci_handle_port_suspend:
 *
 * Handle port suspend/resume request.
 */
static void
ehci_handle_port_suspend(
        ehci_state_t            *ehcip,
        uint16_t                port,
        uint_t                  on)
{
        uint_t                  port_status;

        mutex_enter(&ehcip->ehci_int_mutex);

        port_status = Get_OpReg(ehci_rh_port_status[port]) &
            ~EHCI_RH_PORT_CLEAR_MASK;

        USB_DPRINTF_L4(PRINT_MASK_ROOT_HUB, ehcip->ehci_log_hdl,
            "ehci_handle_port_suspend: port = 0x%x, status = 0x%x",
            port, port_status);

        /* Check port is owned by ehci */
        if (ehci_is_port_owner(ehcip, port) != USB_SUCCESS) {
                mutex_exit(&ehcip->ehci_int_mutex);

                return;
        }

        if (on) {
                /*
                 * Suspend port only if port is enabled and
                 * it is not already in suspend state.
                 */
                if ((port_status & EHCI_RH_PORT_ENABLE) &&
                    (!(port_status & EHCI_RH_PORT_SUSPEND))) {
                        /* Suspend the port */
                        Set_OpReg(ehci_rh_port_status[port],
                            port_status | EHCI_RH_PORT_SUSPEND);

                        mutex_exit(&ehcip->ehci_int_mutex);

                        /* Wait 10ms for port move to suspend state */
                        delay(drv_usectohz(EHCI_PORT_SUSPEND_TIMEWAIT));

                        return;
                }
        } else {
                /* Perform resume only if port is in suspend state */
                if (port_status & EHCI_RH_PORT_SUSPEND) {
                        /* Resume the port */
                        Set_OpReg(ehci_rh_port_status[port],
                            port_status | EHCI_RH_PORT_RESUME);
                }
        }

        mutex_exit(&ehcip->ehci_int_mutex);
}


/*
 * ehci_handle_clrchng_port_suspend:
 *
 * Handle port clear port suspend change bit.
 */
static void
ehci_handle_clrchng_port_suspend(
        ehci_state_t            *ehcip,
        uint16_t                port)
{
        uint_t                  port_status;
        int                     i;

        mutex_enter(&ehcip->ehci_int_mutex);

        port_status = Get_OpReg(ehci_rh_port_status[port]) &
            ~EHCI_RH_PORT_CLEAR_MASK;

        USB_DPRINTF_L4(PRINT_MASK_ROOT_HUB, ehcip->ehci_log_hdl,
            "ehci_handle_clrchng_port_suspend: port = 0x%x, "
            "status = 0x%x", port, port_status);

        /* Check port is owned by ehci */
        if (ehci_is_port_owner(ehcip, port) != USB_SUCCESS) {
                mutex_exit(&ehcip->ehci_int_mutex);

                return;
        }

        /* Return if port is not in resume state */
        if (!(port_status & EHCI_RH_PORT_RESUME)) {
                mutex_exit(&ehcip->ehci_int_mutex);

                return;
        }

        mutex_exit(&ehcip->ehci_int_mutex);

        /* Wait for 20ms to terminate resume */
        delay(drv_usectohz(EHCI_PORT_RESUME_TIMEWAIT));

        mutex_enter(&ehcip->ehci_int_mutex);

        Set_OpReg(ehci_rh_port_status[port],
            port_status & ~EHCI_RH_PORT_RESUME);

        mutex_exit(&ehcip->ehci_int_mutex);

        /*
         * Wait for port to return to high speed mode. It's necessary to poll
         * for resume completion for some high-speed devices to work correctly.
         */
        for (i = 0; i < EHCI_PORT_RESUME_RETRY_MAX; i++) {
                delay(drv_usectohz(EHCI_PORT_RESUME_COMP_TIMEWAIT));

                mutex_enter(&ehcip->ehci_int_mutex);
                port_status = Get_OpReg(ehci_rh_port_status[port]) &
                    ~EHCI_RH_PORT_CLEAR_MASK;
                mutex_exit(&ehcip->ehci_int_mutex);

                if (!(port_status & EHCI_RH_PORT_RESUME)) {
                        break;
                }
        }
}


/*
 * ehci_handle_port_reset:
 *
 * Perform a port reset.
 */
static void
ehci_handle_port_reset(
        ehci_state_t            *ehcip,
        uint16_t                port)
{
        ehci_root_hub_t         *rh;
        uint_t                  port_status;
        int                     i;

        mutex_enter(&ehcip->ehci_int_mutex);

        /* Get the root hub structure */
        rh = &ehcip->ehci_root_hub;

        /* Get the port status information */
        port_status = Get_OpReg(ehci_rh_port_status[port]) &
            ~EHCI_RH_PORT_CLEAR_MASK;

        USB_DPRINTF_L4(PRINT_MASK_ROOT_HUB, ehcip->ehci_log_hdl,
            "ehci_handle_port_reset: port = 0x%x status = 0x%x",
            port, port_status);

        /* Check port is owned by ehci */
        if (ehci_is_port_owner(ehcip, port) != USB_SUCCESS) {
                mutex_exit(&ehcip->ehci_int_mutex);

                return;
        }

        if (port_status & EHCI_RH_PORT_LOW_SPEED) {
                /* Check for classic or companion host controllers */
                if (rh->rh_companion_controllers) {
                        USB_DPRINTF_L3(PRINT_MASK_ROOT_HUB, ehcip->ehci_log_hdl,
                            "ehci_handle_port_reset: Low speed device "
                            "and handover this port to Companion controller");

                        Set_OpReg(ehci_rh_port_status[port],
                            port_status | EHCI_RH_PORT_OWNER_CLASSIC);
                } else {
                        USB_DPRINTF_L1(PRINT_MASK_ROOT_HUB, ehcip->ehci_log_hdl,
                            "Low speed device is not supported");
                }
        } else {
                Set_OpReg(ehci_rh_port_status[port],
                    ((port_status | EHCI_RH_PORT_RESET) &
                    ~EHCI_RH_PORT_ENABLE));

                mutex_exit(&ehcip->ehci_int_mutex);

                /* Wait 50ms for reset to complete */
                delay(drv_usectohz(EHCI_PORT_RESET_TIMEWAIT));

                mutex_enter(&ehcip->ehci_int_mutex);

                port_status = Get_OpReg(ehci_rh_port_status[port]) &
                    ~EHCI_RH_PORT_CLEAR_MASK;

                Set_OpReg(ehci_rh_port_status[port],
                    (port_status & ~EHCI_RH_PORT_RESET));

                mutex_exit(&ehcip->ehci_int_mutex);

                /*
                 * Wait for hardware to enable this port, if the connected
                 * usb device is high speed. It's necessary to poll for reset
                 * completion for some high-speed devices to recognized
                 * correctly.
                 */
                for (i = 0; i < EHCI_PORT_RESET_RETRY_MAX; i++) {
                        delay(drv_usectohz(EHCI_PORT_RESET_COMP_TIMEWAIT));

                        mutex_enter(&ehcip->ehci_int_mutex);
                        port_status = Get_OpReg(ehci_rh_port_status[port]) &
                            ~EHCI_RH_PORT_CLEAR_MASK;
                        mutex_exit(&ehcip->ehci_int_mutex);

                        if (!(port_status & EHCI_RH_PORT_RESET)) {
                                break;
                        }
                }

                mutex_enter(&ehcip->ehci_int_mutex);

                port_status = Get_OpReg(ehci_rh_port_status[port]) &
                    ~EHCI_RH_PORT_CLEAR_MASK;

                /*
                 * If port is not enabled, connected device is a
                 * Full-speed usb device.
                 */
                if (!(port_status & EHCI_RH_PORT_ENABLE)) {
                        /* Check for classic or companion host controllers */
                        if (rh->rh_companion_controllers) {
                                USB_DPRINTF_L3(PRINT_MASK_ROOT_HUB,
                                    ehcip->ehci_log_hdl,
                                    "ehci_handle_port_reset: Full speed device "
                                    "and handover this port to Companion host "
                                    "controller");

                                Set_OpReg(ehci_rh_port_status[port],
                                    port_status | EHCI_RH_PORT_OWNER_CLASSIC);
                        } else {
                                USB_DPRINTF_L1(PRINT_MASK_ROOT_HUB,
                                    ehcip->ehci_log_hdl,
                                    "Full speed device is not supported");
                        }
                } else {
                        USB_DPRINTF_L3(PRINT_MASK_ROOT_HUB, ehcip->ehci_log_hdl,
                            "ehci_handle_port_reset: High speed device ");

                        port_status = Get_OpReg(ehci_rh_port_status[port]) &
                            ~EHCI_RH_PORT_CLEAR_MASK;

                        /*
                         * Disable over-current, connect, and disconnect
                         * wakeup bits.
                         */
                        Set_OpReg(ehci_rh_port_status[port], port_status &
                            ~(EHCI_RH_PORT_OVER_CURENT_ENABLE |
                            EHCI_RH_PORT_DISCONNECT_ENABLE |
                            EHCI_RH_PORT_CONNECT_ENABLE));

                        /*
                         * The next function is only called if the interrupt
                         * pipe is polling and the USBA is ready to receive
                         * the data.
                         */
                        ehcip->ehci_root_hub.
                            rh_intr_pending_status |= (1 << port);

                        if (ehcip->ehci_root_hub.
                            rh_intr_pipe_state == EHCI_PIPE_STATE_ACTIVE) {

                                ehci_root_hub_reset_occured(ehcip);
                        }
                }
        }

        mutex_exit(&ehcip->ehci_int_mutex);
}


/*
 * ehci_root_hub_reset_occured:
 *
 * Inform the upper layer that reset has occured on the port. This is
 * required because the upper layer is expecting a an evernt immidiately
 * after doing reset. In case of OHCI, the controller gets an interrupt
 * for the change in the root hub status but in case of EHCI, we dont.
 * So, send a event to the upper layer as soon as we complete the reset.
 */
void
ehci_root_hub_reset_occured(
        ehci_state_t            *ehcip)
{
        usb_intr_req_t          *curr_intr_reqp =
            ehcip->ehci_root_hub.rh_curr_intr_reqp;
        usb_port_mask_t         port_mask;
        usba_pipe_handle_data_t *ph;

        USB_DPRINTF_L4(PRINT_MASK_ROOT_HUB, ehcip->ehci_log_hdl,
            "ehci_root_hub_reset_occured: curr_intr_reqp = 0x%p data = 0x%p",
            (void *)curr_intr_reqp, (void *)curr_intr_reqp->intr_data);

        /* Get the interrupt pipe handle */
        ph = ehcip->ehci_root_hub.rh_intr_pipe_handle;

        /* Get the pending status */
        port_mask = ehcip->ehci_root_hub.rh_intr_pending_status << 1;

        do {
                *curr_intr_reqp->intr_data->b_wptr++ = (uchar_t)port_mask;
                port_mask >>= 8;
        } while (port_mask != 0);

        ehci_root_hub_hcdi_callback(ph, USB_CR_OK);

        /* Reset pending status */
        ehcip->ehci_root_hub.rh_intr_pending_status = 0;

        /* If needed, allocate new interrupt request */
        if ((ehci_root_hub_allocate_intr_pipe_resource(
            ehcip, 0)) != USB_SUCCESS) {

                /* Do interrupt pipe cleanup */
                ehci_root_hub_intr_pipe_cleanup(ehcip, USB_CR_NO_RESOURCES);
        }
}


/*
 * ehci_handle_complete_port_reset:
 *
 * Perform a port reset change.
 */
static void
ehci_handle_complete_port_reset(
        ehci_state_t            *ehcip,
        uint16_t                port)
{
        uint_t                  port_status;

        mutex_enter(&ehcip->ehci_int_mutex);

        port_status = Get_OpReg(ehci_rh_port_status[port]) &
            ~EHCI_RH_PORT_CLEAR_MASK;

        USB_DPRINTF_L4(PRINT_MASK_ROOT_HUB, ehcip->ehci_log_hdl,
            "ehci_handle_complete_port_reset: port = 0x%x status = 0x%x",
            port, port_status);

        /* Check port is owned by ehci */
        if (ehci_is_port_owner(ehcip, port) != USB_SUCCESS) {
                mutex_exit(&ehcip->ehci_int_mutex);

                return;
        }

        if (port_status & EHCI_RH_PORT_RESET) {
                Set_OpReg(ehci_rh_port_status[port],
                    port_status & ~EHCI_RH_PORT_RESET);

        }

        mutex_exit(&ehcip->ehci_int_mutex);
}


/*
 * ehci_handle_clear_port_connection:
 *
 * Perform a clear port connection.
 */
static void
ehci_handle_clear_port_connection(
        ehci_state_t            *ehcip,
        uint16_t                port)
{
        uint_t                  port_status;

        mutex_enter(&ehcip->ehci_int_mutex);

        port_status = Get_OpReg(ehci_rh_port_status[port]) &
            ~EHCI_RH_PORT_CLEAR_MASK;

        USB_DPRINTF_L4(PRINT_MASK_ROOT_HUB, ehcip->ehci_log_hdl,
            "ehci_handle_clear_port_connection: port = 0x%x"
            "status = 0x%x", port, port_status);

        Set_OpReg(ehci_rh_port_status[port],
            port_status | EHCI_RH_PORT_CONNECT_STS_CHANGE);

        mutex_exit(&ehcip->ehci_int_mutex);
}


/*
 * ehci_handle_clrchng_port_over_current:
 *
 * Perform a clear port connection.
 */
static void
ehci_handle_clrchng_port_over_current(
        ehci_state_t            *ehcip,
        uint16_t                port)
{
        uint_t                  port_status;

        mutex_enter(&ehcip->ehci_int_mutex);

        port_status = Get_OpReg(ehci_rh_port_status[port]) &
            ~EHCI_RH_PORT_CLEAR_MASK;

        USB_DPRINTF_L4(PRINT_MASK_ROOT_HUB, ehcip->ehci_log_hdl,
            "ehci_handle_clrchng_port_over_current: port = 0x%x"
            "status = 0x%x", port, port_status);

        Set_OpReg(ehci_rh_port_status[port],
            port_status | EHCI_RH_PORT_OVER_CURR_CHANGE);

        mutex_exit(&ehcip->ehci_int_mutex);
}


/*
 * ehci_handle_get_port_status:
 *
 * Handle a get port status request.
 */
static void
ehci_handle_get_port_status(
        ehci_state_t            *ehcip,
        uint16_t                port)
{
        usb_ctrl_req_t          *ctrl_reqp;
        mblk_t                  *message;
        uint_t                  new_port_status = 0;
        uint_t                  change_status = 0;
        uint_t                  port_status;

        mutex_enter(&ehcip->ehci_int_mutex);

        ctrl_reqp = ehcip->ehci_root_hub.rh_curr_ctrl_reqp;

        /* Get the root hub port status information */
        port_status = ehci_get_root_hub_port_status(ehcip, port);

        new_port_status = port_status & PORT_STATUS_MASK;
        change_status = (port_status >> 16) & PORT_CHANGE_MASK_2X;

        ehcip->ehci_root_hub.rh_port_status[port] = new_port_status;

        USB_DPRINTF_L4(PRINT_MASK_ROOT_HUB, ehcip->ehci_log_hdl,
            "ehci_handle_get_port_status: port = %d new status = 0x%x"
            "change = 0x%x", port, new_port_status, change_status);

        message = ctrl_reqp->ctrl_data;

        ASSERT(message != NULL);

        *message->b_wptr++ = (uchar_t)new_port_status;
        *message->b_wptr++ = (uchar_t)(new_port_status >> 8);
        *message->b_wptr++ = (uchar_t)change_status;
        *message->b_wptr++ = (uchar_t)(change_status >> 8);

        /* Save the data in control request */
        ctrl_reqp->ctrl_data = message;

        mutex_exit(&ehcip->ehci_int_mutex);
}


/*
 * ehci_handle_get_hub_descriptor:
 */
static void
ehci_handle_get_hub_descriptor(
        ehci_state_t            *ehcip)
{
        usb_ctrl_req_t          *ctrl_reqp;
        mblk_t                  *message;
        usb_hub_descr_t         *root_hub_descr;
        size_t                  length;
        uchar_t                 raw_descr[ROOT_HUB_DESCRIPTOR_LENGTH];

        mutex_enter(&ehcip->ehci_int_mutex);

        ctrl_reqp = ehcip->ehci_root_hub.rh_curr_ctrl_reqp;
        root_hub_descr = &ehcip->ehci_root_hub.rh_descr;
        length = ctrl_reqp->ctrl_wLength;

        USB_DPRINTF_L4(PRINT_MASK_ROOT_HUB, ehcip->ehci_log_hdl,
            "ehci_handle_get_hub_descriptor: Ctrl Req  = 0x%p",
            (void *)ctrl_reqp);

        message = ctrl_reqp->ctrl_data;

        ASSERT(message != NULL);

        bzero(&raw_descr, ROOT_HUB_DESCRIPTOR_LENGTH);

        raw_descr[0] = root_hub_descr->bDescLength;
        raw_descr[1] = root_hub_descr->bDescriptorType;
        raw_descr[2] = root_hub_descr->bNbrPorts;
        raw_descr[3] = root_hub_descr->wHubCharacteristics & 0x00FF;
        raw_descr[4] = (root_hub_descr->wHubCharacteristics & 0xFF00) >> 8;
        raw_descr[5] = root_hub_descr->bPwrOn2PwrGood;
        raw_descr[6] = root_hub_descr->bHubContrCurrent;
        raw_descr[7] = root_hub_descr->DeviceRemovable;
        raw_descr[8] = root_hub_descr->PortPwrCtrlMask;

        bcopy(raw_descr, message->b_wptr, length);
        message->b_wptr += length;

        /* Save the data in control request */
        ctrl_reqp->ctrl_data = message;

        mutex_exit(&ehcip->ehci_int_mutex);
}


/*
 * ehci_handle_get_hub_status:
 *
 * Handle a get hub status request.
 */
static void
ehci_handle_get_hub_status(
        ehci_state_t            *ehcip)
{
        usb_ctrl_req_t          *ctrl_reqp;
        mblk_t                  *message;
        uint_t                  new_root_hub_status;

        mutex_enter(&ehcip->ehci_int_mutex);

        ctrl_reqp = ehcip->ehci_root_hub.rh_curr_ctrl_reqp;

        /*
         * For EHCI, there is no overall hub status information.
         * Only individual root hub port status information is
         * available. So return zero for the root hub status
         * request.
         */
        new_root_hub_status = 0;

        USB_DPRINTF_L4(PRINT_MASK_ROOT_HUB, ehcip->ehci_log_hdl,
            "ehci_handle_get_hub_status: new root hub status = 0x%x",
            new_root_hub_status);

        message = ctrl_reqp->ctrl_data;

        ASSERT(message != NULL);

        *message->b_wptr++ = (uchar_t)new_root_hub_status;
        *message->b_wptr++ = (uchar_t)(new_root_hub_status >> 8);
        *message->b_wptr++ = (uchar_t)(new_root_hub_status >> 16);
        *message->b_wptr++ = (uchar_t)(new_root_hub_status >> 24);

        /* Save the data in control request */
        ctrl_reqp->ctrl_data = message;

        mutex_exit(&ehcip->ehci_int_mutex);
}


/*
 * ehci_handle_get_device_status:
 *
 * Handle a get device status request.
 */
static void
ehci_handle_get_device_status(
        ehci_state_t            *ehcip)
{
        usb_ctrl_req_t          *ctrl_reqp;
        mblk_t                  *message;
        uint16_t                dev_status;

        mutex_enter(&ehcip->ehci_int_mutex);

        ctrl_reqp = ehcip->ehci_root_hub.rh_curr_ctrl_reqp;

        /*
         * For EHCI, there is no device status information.
         * Simply return what is desired for the request.
         */
        dev_status = USB_DEV_SLF_PWRD_STATUS;

        USB_DPRINTF_L4(PRINT_MASK_ROOT_HUB, ehcip->ehci_log_hdl,
            "ehci_handle_get_device_status: device status = 0x%x",
            dev_status);

        message = ctrl_reqp->ctrl_data;

        ASSERT(message != NULL);

        *message->b_wptr++ = (uchar_t)dev_status;
        *message->b_wptr++ = (uchar_t)(dev_status >> 8);

        /* Save the data in control request */
        ctrl_reqp->ctrl_data = message;

        mutex_exit(&ehcip->ehci_int_mutex);
}


/*
 * ehci_handle_root_hub_pipe_start_intr_polling:
 *
 * Handle start polling on root hub interrupt pipe.
 */
/* ARGSUSED */
int
ehci_handle_root_hub_pipe_start_intr_polling(
        usba_pipe_handle_data_t *ph,
        usb_intr_req_t          *client_intr_reqp,
        usb_flags_t             flags)
{
        ehci_state_t            *ehcip = ehci_obtain_state(
            ph->p_usba_device->usb_root_hub_dip);
        usb_ep_descr_t          *eptd = &ph->p_ep;
        int                     error = USB_SUCCESS;
        uint_t                  pipe_state;

        USB_DPRINTF_L4(PRINT_MASK_ROOT_HUB, ehcip->ehci_log_hdl,
            "ehci_handle_root_hub_pipe_start_intr_polling: "
            "Root hub pipe start polling");

        ASSERT(mutex_owned(&ehcip->ehci_int_mutex));

        ASSERT((eptd->bEndpointAddress & USB_EP_NUM_MASK) == 1);

        ASSERT((client_intr_reqp->intr_attributes & USB_ATTRS_ONE_XFER) == 0);

        pipe_state = ehcip->ehci_root_hub.rh_intr_pipe_state;

        switch (pipe_state) {
        case EHCI_PIPE_STATE_IDLE:
                ASSERT(ehcip->ehci_root_hub.rh_intr_pipe_timer_id == 0);

                /*
                 * Save the Original Client's Interrupt IN request
                 * information. We use this for final callback
                 */
                ASSERT(ehcip->ehci_root_hub.rh_client_intr_reqp == NULL);
                ehcip->ehci_root_hub.rh_client_intr_reqp = client_intr_reqp;

                error = ehci_root_hub_allocate_intr_pipe_resource(ehcip, flags);

                if (error != USB_SUCCESS) {
                        /* Reset client interrupt request pointer */
                        ehcip->ehci_root_hub.rh_client_intr_reqp = NULL;

                        USB_DPRINTF_L2(PRINT_MASK_ROOT_HUB, ehcip->ehci_log_hdl,
                            "ehci_handle_root_hub_pipe_start_intr_polling: "
                            "No Resources");

                        return (error);
                }

                /* Check whether we need to send the reset data up */
                if (ehcip->ehci_root_hub.rh_intr_pending_status) {
                        ehci_root_hub_reset_occured(ehcip);
                }

                USB_DPRINTF_L4(PRINT_MASK_ROOT_HUB, ehcip->ehci_log_hdl,
                    "ehci_handle_root_hub_pipe_start_intr_polling: "
                    "Start polling for root hub successful");

                break;
        case EHCI_PIPE_STATE_ACTIVE:
                USB_DPRINTF_L2(PRINT_MASK_ROOT_HUB, ehcip->ehci_log_hdl,
                    "ehci_handle_root_hub_pipe_start_intr_polling: "
                    "Polling for root hub is already in progress");

                break;
        default:
                USB_DPRINTF_L2(PRINT_MASK_ROOT_HUB, ehcip->ehci_log_hdl,
                    "ehci_handle_root_hub_pipe_start_intr_polling: "
                    "Pipe is in error state 0x%x", pipe_state);

                error = USB_FAILURE;

                break;
        }

        return (error);
}


/*
 * ehci_handle_root_hub_pipe_stop_intr_polling:
 *
 * Handle stop polling on root hub intr pipe.
 */
/* ARGSUSED */
void
ehci_handle_root_hub_pipe_stop_intr_polling(
        usba_pipe_handle_data_t *ph,
        usb_flags_t             flags)
{
        ehci_state_t            *ehcip = ehci_obtain_state(
            ph->p_usba_device->usb_root_hub_dip);
        usb_ep_descr_t          *eptd = &ph->p_ep;

        ASSERT(mutex_owned(&ehcip->ehci_int_mutex));

        USB_DPRINTF_L4(PRINT_MASK_ROOT_HUB, ehcip->ehci_log_hdl,
            "ehci_handle_root_hub_pipe_stop_intr_polling: "
            "Root hub pipe stop polling");

        ASSERT((eptd->bEndpointAddress & USB_EP_NUM_MASK) == 1);

        if (ehcip->ehci_root_hub.rh_intr_pipe_state ==
            EHCI_PIPE_STATE_ACTIVE) {

                ehcip->ehci_root_hub.rh_intr_pipe_state =
                    EHCI_PIPE_STATE_STOP_POLLING;

                /* Do interrupt pipe cleanup */
                ehci_root_hub_intr_pipe_cleanup(ehcip, USB_CR_STOPPED_POLLING);

                ASSERT(ehcip->ehci_root_hub.
                    rh_intr_pipe_state == EHCI_PIPE_STATE_IDLE);

                USB_DPRINTF_L4(PRINT_MASK_ROOT_HUB, ehcip->ehci_log_hdl,
                    "ehci_hcdi_pipe_stop_intr_polling: Stop polling for root"
                    "hub successful");
        } else {
                USB_DPRINTF_L2(PRINT_MASK_ROOT_HUB,
                    ehcip->ehci_log_hdl, "ehci_hcdi_pipe_stop_intr_polling: "
                    "Polling for root hub is already stopped");
        }
}


/*
 * ehci_get_root_hub_port_status:
 *
 * Construct root hub port status and change information
 */
static uint_t
ehci_get_root_hub_port_status(
        ehci_state_t            *ehcip,
        uint16_t                port)
{
        uint_t                  new_port_status = 0;
        uint_t                  change_status = 0;
        uint_t                  port_status;

        ASSERT(mutex_owned(&ehcip->ehci_int_mutex));

        /* Read the current port status */
        port_status = Get_OpReg(ehci_rh_port_status[port]);

        USB_DPRINTF_L4(PRINT_MASK_ROOT_HUB, ehcip->ehci_log_hdl,
            "ehci_get_root_hub_port_status: port %d "
            "port status = 0x%x", port, port_status);

        /*
         * EHCI root hub port status and control register information
         * format is different what Hub driver wants. So EHCI driver
         * needs to contruct the proper root hub port status information.
         *
         * Send all port status information only if port is owned by EHCI
         * host controller.
         */
        if ((port_status & EHCI_RH_PORT_OWNER) == EHCI_RH_PORT_OWNER_EHCI) {

                /* First construct port change information */
                if (port_status & EHCI_RH_PORT_ENABLE_CHANGE) {
                        change_status |= PORT_CHANGE_PESC;
                }

                if (port_status & EHCI_RH_PORT_RESUME) {
                        change_status |= PORT_CHANGE_PSSC;
                }

                if (port_status & EHCI_RH_PORT_OVER_CURR_CHANGE) {
                        change_status |= PORT_CHANGE_OCIC;
                }

                /* Now construct port status information */
                if (port_status & EHCI_RH_PORT_CONNECT_STATUS) {
                        new_port_status |= PORT_STATUS_CCS;
                }

                if (port_status & EHCI_RH_PORT_ENABLE) {
                        new_port_status |=
                            (PORT_STATUS_PES | PORT_STATUS_HSDA);
                }

                if (port_status & EHCI_RH_PORT_SUSPEND) {
                        new_port_status |= PORT_STATUS_PSS;
                }

                if (port_status & EHCI_RH_PORT_OVER_CURR_ACTIVE) {
                        new_port_status |= PORT_STATUS_POCI;
                }

                if (port_status & EHCI_RH_PORT_RESET) {
                        new_port_status |= PORT_STATUS_PRS;
                }

                if (port_status & EHCI_RH_PORT_INDICATOR) {
                        new_port_status |= PORT_STATUS_PIC;
                }
        }

        /*
         * Send the following port status and change information
         * even if port is not owned by EHCI.
         *
         * Additional port change information.
         */
        if (port_status & EHCI_RH_PORT_CONNECT_STS_CHANGE) {
                change_status |= PORT_CHANGE_CSC;
        }

        /* Additional port status information */
        if (port_status & EHCI_RH_PORT_POWER) {
                new_port_status |= PORT_STATUS_PPS;
        }

        if ((!(port_status & EHCI_RH_PORT_ENABLE)) &&
            (port_status & EHCI_RH_PORT_LOW_SPEED)) {
                new_port_status |= PORT_STATUS_LSDA;
        }

        /*
         * Construct complete root hub port status and change information.
         */
        port_status = ((change_status << 16) | new_port_status);

        USB_DPRINTF_L4(PRINT_MASK_ROOT_HUB, ehcip->ehci_log_hdl,
            "ehci_get_root_hub_port_status: port = %d new status = 0x%x "
            "change status = 0x%x complete port status 0x%x", port,
            new_port_status, change_status, port_status);

        return (port_status);
}


/*
 * ehci_is_port_owner:
 *
 * Check whether given port is owned by ehci.
 */
static int
ehci_is_port_owner(
        ehci_state_t            *ehcip,
        uint16_t                port)
{
        uint_t                  port_status;

        ASSERT(mutex_owned(&ehcip->ehci_int_mutex));

        port_status = Get_OpReg(ehci_rh_port_status[port]) &
            ~EHCI_RH_PORT_CLEAR_MASK;

        /*
         * Don't perform anything if port is owned by classis host
         * controller and return success.
         */
        if ((port_status & EHCI_RH_PORT_OWNER) == EHCI_RH_PORT_OWNER_CLASSIC) {

                USB_DPRINTF_L2(PRINT_MASK_ROOT_HUB, ehcip->ehci_log_hdl,
                    "ehci_handle_set_clear_port_feature: "
                    "Port %d is owned by classic host controller", port);

                return (USB_FAILURE);
        }

        return (USB_SUCCESS);
}


/*
 * ehci_root_hub_allocate_intr_pipe_resource:
 *
 * Allocate interrupt requests and initialize them.
 */
static int
ehci_root_hub_allocate_intr_pipe_resource(
        ehci_state_t            *ehcip,
        usb_flags_t             flags)
{
        usba_pipe_handle_data_t *ph;
        size_t                  length;
        usb_intr_req_t          *curr_intr_reqp;

        USB_DPRINTF_L4(PRINT_MASK_ROOT_HUB, ehcip->ehci_log_hdl,
            "ehci_root_hub_allocate_intr_pipe_resource");

        ASSERT(mutex_owned(&ehcip->ehci_int_mutex));

        /* Get the interrupt pipe handle */
        ph = ehcip->ehci_root_hub.rh_intr_pipe_handle;

        /* Get the current interrupt request pointer */
        curr_intr_reqp = ehcip->ehci_root_hub.rh_curr_intr_reqp;

        /*
         * If current interrupt request pointer is null,
         * allocate new interrupt request.
         */
        if (curr_intr_reqp == NULL) {
                ASSERT(ehcip->ehci_root_hub.rh_client_intr_reqp);

                /* Get the length of interrupt transfer */
                length = ehcip->ehci_root_hub.
                    rh_client_intr_reqp->intr_len;

                curr_intr_reqp = usba_hcdi_dup_intr_req(ph->p_dip,
                    ehcip->ehci_root_hub.rh_client_intr_reqp,
                    length, flags);

                if (curr_intr_reqp == NULL) {

                        USB_DPRINTF_L2(PRINT_MASK_ROOT_HUB, ehcip->ehci_log_hdl,
                            "ehci_root_hub_allocate_intr_pipe_resource:"
                            "Interrupt request structure allocation failed");

                        return (USB_NO_RESOURCES);
                }

                ehcip->ehci_root_hub.rh_curr_intr_reqp = curr_intr_reqp;
                mutex_enter(&ph->p_mutex);
                ph->p_req_count++;
                mutex_exit(&ph->p_mutex);
        }

        /* Start the timer for the root hub interrupt pipe polling */
        if (ehcip->ehci_root_hub.rh_intr_pipe_timer_id == 0) {
                ehcip->ehci_root_hub.rh_intr_pipe_timer_id =
                    timeout(ehci_handle_root_hub_status_change,
                    (void *)ehcip, drv_usectohz(EHCI_RH_POLL_TIME));

                ehcip->ehci_root_hub.
                    rh_intr_pipe_state = EHCI_PIPE_STATE_ACTIVE;
        }

        return (USB_SUCCESS);
}


/*
 * ehci_root_hub_intr_pipe_cleanup:
 *
 * Deallocate all interrupt requests and do callback
 * the original client interrupt request.
 */
static void
ehci_root_hub_intr_pipe_cleanup(
        ehci_state_t            *ehcip,
        usb_cr_t                completion_reason)
{
        usb_intr_req_t          *curr_intr_reqp;
        usb_opaque_t            client_intr_reqp;
        timeout_id_t            timer_id;
        usba_pipe_handle_data_t *ph;

        USB_DPRINTF_L4(PRINT_MASK_ROOT_HUB, ehcip->ehci_log_hdl,
            "ehci_root_hub_intr_pipe_cleanup");

        ASSERT(mutex_owned(&ehcip->ehci_int_mutex));

        /* Get the interrupt pipe handle */
        ph = ehcip->ehci_root_hub.rh_intr_pipe_handle;

        /* Get the interrupt timerid */
        timer_id = ehcip->ehci_root_hub.rh_intr_pipe_timer_id;

        /* Stop the root hub interrupt timer */
        if (timer_id) {
                /* Reset the timer id to zero */
                ehcip->ehci_root_hub.rh_intr_pipe_timer_id = 0;

                mutex_exit(&ehcip->ehci_int_mutex);
                (void) untimeout(timer_id);
                mutex_enter(&ehcip->ehci_int_mutex);
        }

        /* Reset the current interrupt request pointer */
        curr_intr_reqp = ehcip->ehci_root_hub.rh_curr_intr_reqp;

        /* Deallocate uncompleted interrupt request */
        if (curr_intr_reqp) {
                ehcip->ehci_root_hub.rh_curr_intr_reqp = NULL;
                usb_free_intr_req(curr_intr_reqp);

                mutex_enter(&ph->p_mutex);
                ph->p_req_count--;
                mutex_exit(&ph->p_mutex);
        }

        client_intr_reqp = (usb_opaque_t)
            ehcip->ehci_root_hub.rh_client_intr_reqp;

        /* Callback for original client interrupt request */
        if (client_intr_reqp) {
                ehci_root_hub_hcdi_callback(ph, completion_reason);
        }
}


/*
 * ehci_handle_root_hub_status_change:
 *
 * A root hub status change interrupt will occur any time there is a change
 * in the root hub status register or one of the port status registers.
 */
static void
ehci_handle_root_hub_status_change(void *arg)
{
        ehci_state_t            *ehcip = (ehci_state_t *)arg;
        usb_hub_descr_t         *root_hub_descr =
            &ehcip->ehci_root_hub.rh_descr;
        usb_intr_req_t          *curr_intr_reqp;
        usb_port_mask_t         port_mask = 0;
        uint_t                  new_port_status;
        uint_t                  change_status;
        uint_t                  port_status;
        mblk_t                  *message;
        size_t                  length;
        usb_ep_descr_t          *eptd;
        usba_pipe_handle_data_t *ph;
        int                     i;

        mutex_enter(&ehcip->ehci_int_mutex);

        USB_DPRINTF_L4(PRINT_MASK_ROOT_HUB, ehcip->ehci_log_hdl,
            "ehci_handle_root_hub_status_change: state = %d",
            ehcip->ehci_root_hub.rh_intr_pipe_state);

#if defined(__x86)
        /*
         * When ohci are attached in ferrari 4000, SMI will reset ehci
         * registers. If ehci registers have been reset, we must re-initialize
         * them. During booting, this function will be called 2~3 times. When
         * this function is called 16 times, ohci drivers have been attached
         * and stop checking the ehci registers.
         */
        if (ehcip->ehci_polled_root_hub_count < 16) {

                if (Get_OpReg(ehci_config_flag) == 0) {

                        USB_DPRINTF_L2(PRINT_MASK_ROOT_HUB,
                            ehcip->ehci_log_hdl,
                            "ehci_handle_root_hub_status_change:"
                            " EHCI have been reset");

                        /* Reinitialize the controller */
                        if (ehci_init_ctlr(ehcip, EHCI_REINITIALIZATION) !=
                            DDI_SUCCESS) {
                                mutex_exit(&ehcip->ehci_int_mutex);

                                return;
                        }
                }

                ehcip->ehci_polled_root_hub_count++;
        }
#endif  /* __x86 */

        /* Get the current interrupt request pointer */
        curr_intr_reqp = ehcip->ehci_root_hub.rh_curr_intr_reqp;

        ph = ehcip->ehci_root_hub.rh_intr_pipe_handle;

        /* Check whether timeout handler is valid */
        if (ehcip->ehci_root_hub.rh_intr_pipe_timer_id) {
                /* Check host controller is in operational state */
                if ((ehci_state_is_operational(ehcip)) != USB_SUCCESS) {
                        /* Reset the timer id */
                        ehcip->ehci_root_hub.rh_intr_pipe_timer_id = 0;

                        /* Do interrupt pipe cleanup */
                        ehci_root_hub_intr_pipe_cleanup(
                            ehcip, USB_CR_HC_HARDWARE_ERR);

                        mutex_exit(&ehcip->ehci_int_mutex);

                        return;
                }
        } else {
                mutex_exit(&ehcip->ehci_int_mutex);

                return;
        }

        eptd = &ehcip->ehci_root_hub.rh_intr_pipe_handle->p_ep;

        /* Check each port */
        for (i = 0; i < root_hub_descr->bNbrPorts; i++) {

                port_status = ehci_get_root_hub_port_status(ehcip, i);

                new_port_status = port_status & PORT_STATUS_MASK;
                change_status = (port_status >> 16) & PORT_CHANGE_MASK_2X;

                /*
                 * If there is change in the port status then set the bit in the
                 * bitmap of changes and inform hub driver about these changes.
                 * Hub driver will take care of these changes.
                 */
                if (change_status) {

                        /* See if a device was attached/detached */
                        if (change_status & PORT_CHANGE_CSC) {
                                /*
                                 * Update the state depending on whether
                                 * the port was attached or detached.
                                 */
                                if (new_port_status & PORT_STATUS_CCS) {
                                        ehcip->ehci_root_hub.
                                            rh_port_state[i] = DISABLED;

                                        USB_DPRINTF_L3(PRINT_MASK_ROOT_HUB,
                                            ehcip->ehci_log_hdl,
                                            "Port %d connected", i+1);
                                } else {
                                        ehcip->ehci_root_hub.
                                            rh_port_state[i] = DISCONNECTED;

                                        USB_DPRINTF_L3(PRINT_MASK_ROOT_HUB,
                                            ehcip->ehci_log_hdl,
                                            "Port %d disconnected", i+1);
                                }
                        }

                        /* See if port enable status changed */
                        if (change_status & PORT_CHANGE_PESC) {
                                /*
                                 * Update the state depending on whether
                                 * the port was enabled or disabled.
                                 */
                                if (new_port_status & PORT_STATUS_PES) {
                                        ehcip->ehci_root_hub.
                                            rh_port_state[i] = ENABLED;

                                        USB_DPRINTF_L3(PRINT_MASK_ROOT_HUB,
                                            ehcip->ehci_log_hdl,
                                            "Port %d enabled", i+1);
                                } else {
                                        ehcip->ehci_root_hub.
                                            rh_port_state[i] = DISABLED;

                                        USB_DPRINTF_L3(PRINT_MASK_ROOT_HUB,
                                            ehcip->ehci_log_hdl,
                                            "Port %d disabled", i+1);
                                }
                        }

                        port_mask |= 1 << (i + 1);

                        /* Update the status */
                        ehcip->ehci_root_hub.
                            rh_port_status[i] = new_port_status;
                }
        }

        if (ph && port_mask && curr_intr_reqp) {
                length = eptd->wMaxPacketSize;

                ASSERT(length != 0);

                /* Get the  message block */
                message = curr_intr_reqp->intr_data;

                ASSERT(message != NULL);

                do {
                        /*
                         * check that the mblk is big enough when we
                         * are writing bytes into it
                         */
                        if (message->b_wptr >= message->b_datap->db_lim) {

                                USB_DPRINTF_L2(PRINT_MASK_ROOT_HUB,
                                    ehcip->ehci_log_hdl,
                                    "ehci_handle_root_hub_status_change"
                                    "mblk data overflow.");

                                break;
                        }
                        *message->b_wptr++ = (uchar_t)port_mask;
                        port_mask >>= 8;
                } while (port_mask != 0);

                ehci_root_hub_hcdi_callback(ph, USB_CR_OK);
        }

        /* Reset the timer id */
        ehcip->ehci_root_hub.rh_intr_pipe_timer_id = 0;

        if (ehcip->ehci_root_hub.rh_intr_pipe_state ==
            EHCI_PIPE_STATE_ACTIVE) {
                /*
                 * If needed, allocate new interrupt request. Also
                 * start the timer for the root hub interrupt polling.
                 */
                if ((ehci_root_hub_allocate_intr_pipe_resource(
                    ehcip, 0)) != USB_SUCCESS) {

                        USB_DPRINTF_L2(PRINT_MASK_ROOT_HUB, ehcip->ehci_log_hdl,
                            "ehci_handle_root_hub_status_change: No Resources");

                        /* Do interrupt pipe cleanup */
                        ehci_root_hub_intr_pipe_cleanup(
                            ehcip, USB_CR_NO_RESOURCES);
                }
        }

        mutex_exit(&ehcip->ehci_int_mutex);
}


/*
 * ehci_root_hub_hcdi_callback()
 *
 * Convenience wrapper around usba_hcdi_cb() for the root hub.
 */
static void
ehci_root_hub_hcdi_callback(
        usba_pipe_handle_data_t *ph,
        usb_cr_t                completion_reason)
{
        ehci_state_t            *ehcip = ehci_obtain_state(
            ph->p_usba_device->usb_root_hub_dip);
        uchar_t                 attributes = ph->p_ep.bmAttributes &
            USB_EP_ATTR_MASK;
        usb_opaque_t            curr_xfer_reqp;
        uint_t                  pipe_state = 0;

        USB_DPRINTF_L4(PRINT_MASK_ROOT_HUB, ehcip->ehci_log_hdl,
            "ehci_root_hub_hcdi_callback: ph = 0x%p, cr = 0x%x",
            (void *)ph, completion_reason);

        ASSERT(mutex_owned(&ehcip->ehci_int_mutex));

        /* Set the pipe state as per completion reason */
        switch (completion_reason) {
        case USB_CR_OK:
                switch (attributes) {
                case USB_EP_ATTR_CONTROL:
                        pipe_state = EHCI_PIPE_STATE_IDLE;
                        break;
                case USB_EP_ATTR_INTR:
                        pipe_state = ehcip->ehci_root_hub.
                            rh_intr_pipe_state;
                        break;
                }
                break;
        case USB_CR_NO_RESOURCES:
        case USB_CR_NOT_SUPPORTED:
        case USB_CR_STOPPED_POLLING:
        case USB_CR_PIPE_RESET:
        case USB_CR_HC_HARDWARE_ERR:
                /* Set pipe state to idle */
                pipe_state = EHCI_PIPE_STATE_IDLE;
                break;
        case USB_CR_PIPE_CLOSING:
                break;
        default:
                /* Set pipe state to error */
                pipe_state = EHCI_PIPE_STATE_ERROR;
                break;
        }

        switch (attributes) {
        case USB_EP_ATTR_CONTROL:
                curr_xfer_reqp = (usb_opaque_t)
                    ehcip->ehci_root_hub.rh_curr_ctrl_reqp;

                ehcip->ehci_root_hub.rh_curr_ctrl_reqp = NULL;
                ehcip->ehci_root_hub.rh_ctrl_pipe_state = pipe_state;
                break;
        case USB_EP_ATTR_INTR:
                /* if curr_intr_reqp available then use this request */
                if (ehcip->ehci_root_hub.rh_curr_intr_reqp) {
                        curr_xfer_reqp = (usb_opaque_t)ehcip->
                            ehci_root_hub.rh_curr_intr_reqp;

                        ehcip->ehci_root_hub.rh_curr_intr_reqp = NULL;
                } else {
                        /* no current request, use client's request */
                        curr_xfer_reqp = (usb_opaque_t)
                            ehcip->ehci_root_hub.rh_client_intr_reqp;

                        ehcip->ehci_root_hub.rh_client_intr_reqp = NULL;
                }
                ehcip->ehci_root_hub.rh_intr_pipe_state = pipe_state;
                break;
        }

        ASSERT(curr_xfer_reqp != NULL);

        mutex_exit(&ehcip->ehci_int_mutex);
        usba_hcdi_cb(ph, curr_xfer_reqp, completion_reason);
        mutex_enter(&ehcip->ehci_int_mutex);
}