FreeBSD/Linux Kernel Cross Reference
sys/dev/usb/usb_hub.h

     /* $FreeBSD$ */
     /*-
      * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
      *
      * Copyright (c) 2008 Hans Petter Selasky. All rights reserved.
      *
      * Redistribution and use in source and binary forms, with or without
      * modification, are permitted provided that the following conditions
      * are met:
     * 1. Redistributions of source code must retain the above copyright
     *    notice, this list of conditions and the following disclaimer.
     * 2. Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in the
     *    documentation and/or other materials provided with the distribution.
     *
     * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
     * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
     * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     * SUCH DAMAGE.
     */
    
    #ifndef _USB_HUB_H_
    #define _USB_HUB_H_
    
    /*
     * The following structure defines an USB port. 
     */
    struct usb_port {
            uint8_t restartcnt;
    #define USB_RESTART_MAX 5
            uint8_t device_index;           /* zero means not valid */
            enum usb_hc_mode usb_mode;      /* host or device mode */
    #if USB_HAVE_TT_SUPPORT
            struct usb_device_request req_reset_tt __aligned(4);
    #endif
    };
    
    /*
     * The following structure defines an USB HUB.
     */
    struct usb_hub {
            struct usb_device *hubudev;     /* the HUB device */
            usb_error_t (*explore) (struct usb_device *hub);
            void   *hubsoftc;
    #if USB_HAVE_TT_SUPPORT
            struct usb_udev_msg tt_msg[2];
    #endif
            usb_size_t uframe_usage[USB_HS_MICRO_FRAMES_MAX];
            uint16_t portpower;             /* mA per USB port */
            uint8_t isoc_last_time;
            uint8_t nports;
    #if (USB_HAVE_FIXED_PORT == 0)
            struct usb_port ports[0];
    #else
            struct usb_port ports[USB_MAX_PORTS];
    #endif
    };
    
    /* function prototypes */
    
    void    usb_hs_bandwidth_alloc(struct usb_xfer *xfer);
    void    usb_hs_bandwidth_free(struct usb_xfer *xfer);
    void    usb_bus_port_set_device(struct usb_bus *bus, struct usb_port *up,
                struct usb_device *udev, uint8_t device_index);
    struct usb_device *usb_bus_port_get_device(struct usb_bus *bus,
                struct usb_port *up);
    void    usb_needs_explore(struct usb_bus *bus, uint8_t do_probe);
    void    usb_needs_explore_all(void);
    void    usb_bus_power_update(struct usb_bus *bus);
    void    usb_bus_powerd(struct usb_bus *bus);
    void    uhub_root_intr(struct usb_bus *, const uint8_t *, uint8_t);
    usb_error_t uhub_query_info(struct usb_device *, uint8_t *, uint8_t *);
    void    uhub_explore_handle_re_enumerate(struct usb_device *);
    
    #endif                                  /* _USB_HUB_H_ */

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