FreeBSD/Linux Kernel Cross Reference
sys/dev/usb/usb_dynamic.c

     /* $FreeBSD: releng/8.3/sys/dev/usb/usb_dynamic.c 225470 2011-09-10 16:52:15Z 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.
     */
    
    #include <sys/stdint.h>
    #include <sys/stddef.h>
    #include <sys/param.h>
    #include <sys/queue.h>
    #include <sys/types.h>
    #include <sys/systm.h>
    #include <sys/kernel.h>
    #include <sys/bus.h>
    #include <sys/module.h>
    #include <sys/lock.h>
    #include <sys/mutex.h>
    #include <sys/condvar.h>
    #include <sys/sysctl.h>
    #include <sys/sx.h>
    #include <sys/unistd.h>
    #include <sys/callout.h>
    #include <sys/malloc.h>
    #include <sys/priv.h>
    
    #include <dev/usb/usb.h>
    #include <dev/usb/usbdi.h>
    
    #include <dev/usb/usb_core.h>
    #include <dev/usb/usb_process.h>
    #include <dev/usb/usb_device.h>
    #include <dev/usb/usb_dynamic.h>
    
    /* function prototypes */
    static usb_handle_req_t usb_temp_get_desc_w;
    static usb_temp_setup_by_index_t usb_temp_setup_by_index_w;
    static usb_temp_unsetup_t usb_temp_unsetup_w;
    static usb_test_quirk_t usb_test_quirk_w;
    static usb_quirk_ioctl_t usb_quirk_ioctl_w;
    
    /* global variables */
    usb_handle_req_t *usb_temp_get_desc_p = &usb_temp_get_desc_w;
    usb_temp_setup_by_index_t *usb_temp_setup_by_index_p = &usb_temp_setup_by_index_w;
    usb_temp_unsetup_t *usb_temp_unsetup_p = &usb_temp_unsetup_w;
    usb_test_quirk_t *usb_test_quirk_p = &usb_test_quirk_w;
    usb_quirk_ioctl_t *usb_quirk_ioctl_p = &usb_quirk_ioctl_w;
    devclass_t usb_devclass_ptr = NULL;
    
    static usb_error_t
    usb_temp_setup_by_index_w(struct usb_device *udev, uint16_t index)
    {
            return (USB_ERR_INVAL);
    }
    
    static uint8_t
    usb_test_quirk_w(const struct usbd_lookup_info *info, uint16_t quirk)
    {
            return (0);                     /* no match */
    }
    
    static int
    usb_quirk_ioctl_w(unsigned long cmd, caddr_t data, int fflag, struct thread *td)
    {
            return (ENOIOCTL);
    }
    
    static usb_error_t
    usb_temp_get_desc_w(struct usb_device *udev, struct usb_device_request *req, const void **pPtr, uint16_t *pLength)
    {
            /* stall */
            return (USB_ERR_STALLED);
    }
    
    static void
    usb_temp_unsetup_w(struct usb_device *udev)
    {
            if (udev->usb_template_ptr) {
    
                    free(udev->usb_template_ptr, M_USB);
   
                   udev->usb_template_ptr = NULL;
           }
   }
   
   void
   usb_quirk_unload(void *arg)
   {
           /* reset function pointers */
   
           usb_test_quirk_p = &usb_test_quirk_w;
           usb_quirk_ioctl_p = &usb_quirk_ioctl_w;
   
           /* wait for CPU to exit the loaded functions, if any */
   
           /* XXX this is a tradeoff */
   
           pause("WAIT", hz);
   }
   
   void
   usb_temp_unload(void *arg)
   {
           /* reset function pointers */
   
           usb_temp_get_desc_p = &usb_temp_get_desc_w;
           usb_temp_setup_by_index_p = &usb_temp_setup_by_index_w;
           usb_temp_unsetup_p = &usb_temp_unsetup_w;
   
           /* wait for CPU to exit the loaded functions, if any */
   
           /* XXX this is a tradeoff */
   
           pause("WAIT", hz);
   }
   
   void
   usb_bus_unload(void *arg)
   {
           /* reset function pointers */
   
           usb_devclass_ptr = NULL;
   
           /* wait for CPU to exit the loaded functions, if any */
   
           /* XXX this is a tradeoff */
   
           pause("WAIT", hz);
   }

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