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

     /* $FreeBSD: releng/8.3/sys/dev/usb/usb_bus.h 229370 2012-01-03 09:15:54Z hselasky $ */
     /*-
      * 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_BUS_H_
    #define _USB_BUS_H_
    
    /*
     * The following structure defines the USB explore message sent to the USB
     * explore process.
     */
    
    struct usb_bus_msg {
            struct usb_proc_msg hdr;
            struct usb_bus *bus;
    };
    
    /*
     * The following structure defines the USB statistics structure.
     */
    struct usb_bus_stat {
            uint32_t uds_requests[4];
    };
    
    /*
     * The following structure defines an USB BUS. There is one USB BUS
     * for every Host or Device controller.
     */
    struct usb_bus {
            struct usb_bus_stat stats_err;
            struct usb_bus_stat stats_ok;
            struct root_hold_token *bus_roothold;
            /*
             * There are two callback processes. One for Giant locked
             * callbacks. One for non-Giant locked callbacks. This should
             * avoid congestion and reduce response time in most cases.
             */
            struct usb_process giant_callback_proc;
            struct usb_process non_giant_callback_proc;
    
            /* Explore process */
            struct usb_process explore_proc;
    
            /* Control request process */
            struct usb_process control_xfer_proc;
    
            struct usb_bus_msg explore_msg[2];
            struct usb_bus_msg detach_msg[2];
            struct usb_bus_msg attach_msg[2];
            struct usb_bus_msg suspend_msg[2];
            struct usb_bus_msg resume_msg[2];
            struct usb_bus_msg shutdown_msg[2];
            /*
             * This mutex protects the USB hardware:
             */
            struct mtx bus_mtx;
            struct usb_xfer_queue intr_q;
            struct usb_callout power_wdog;  /* power management */
    
            device_t parent;
            device_t bdev;                  /* filled by HC driver */
    
    #if USB_HAVE_BUSDMA
            struct usb_dma_parent_tag dma_parent_tag[1];
            struct usb_dma_tag dma_tags[USB_BUS_DMA_TAG_MAX];
    #endif
            struct usb_bus_methods *methods;        /* filled by HC driver */
            struct usb_device **devices;
    
            struct ifnet *ifp;      /* only for USB Packet Filter */
    
            usb_power_mask_t hw_power_state;        /* see USB_HW_POWER_XXX */
            usb_size_t uframe_usage[USB_HS_MICRO_FRAMES_MAX];
    
            uint16_t isoc_time_last;        /* in milliseconds */
    
            uint8_t alloc_failed;           /* Set if memory allocation failed. */
           uint8_t driver_added_refcount;  /* Current driver generation count */
           enum usb_revision usbrev;       /* USB revision. See "USB_REV_XXX". */
   
           uint8_t devices_max;            /* maximum number of USB devices */
           uint8_t do_probe;               /* set if USB should be re-probed */
           uint8_t no_explore;             /* don't explore USB ports */
   
           /* 
            * The scratch area can only be used inside the explore thread
            * belonging to the give serial bus.
            */
           union {
                   struct usb_hw_ep_scratch hw_ep_scratch[1];
                   struct usb_temp_setup temp_setup[1];
                   uint8_t data[255];
           }       scratch[1];
   };
   
   #endif                                  /* _USB_BUS_H_ */

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