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2a4c6157ca
perform a function such as ejecting a 3G autoinstaller disk. The eventhandler system properly tracks threads and is safe to unload, remove the setting/clearing of a function pointer in the kernel by u3g(4) which included a tsleep for safety.
150 lines
4.0 KiB
C
150 lines
4.0 KiB
C
/* $FreeBSD$ */
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/*-
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* Copyright (c) 2008 Hans Petter Selasky. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/stdint.h>
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#include <sys/stddef.h>
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#include <sys/param.h>
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#include <sys/queue.h>
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#include <sys/types.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/bus.h>
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#include <sys/linker_set.h>
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#include <sys/module.h>
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#include <sys/lock.h>
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#include <sys/mutex.h>
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#include <sys/condvar.h>
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#include <sys/sysctl.h>
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#include <sys/sx.h>
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#include <sys/unistd.h>
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#include <sys/callout.h>
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#include <sys/malloc.h>
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#include <sys/priv.h>
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#include <dev/usb/usb.h>
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#include <dev/usb/usbdi.h>
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#include <dev/usb/usb_core.h>
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#include <dev/usb/usb_process.h>
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#include <dev/usb/usb_device.h>
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#include <dev/usb/usb_dynamic.h>
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/* function prototypes */
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static usb_handle_req_t usb_temp_get_desc_w;
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static usb_temp_setup_by_index_t usb_temp_setup_by_index_w;
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static usb_temp_unsetup_t usb_temp_unsetup_w;
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static usb_test_quirk_t usb_test_quirk_w;
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static usb_quirk_ioctl_t usb_quirk_ioctl_w;
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/* global variables */
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usb_handle_req_t *usb_temp_get_desc_p = &usb_temp_get_desc_w;
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usb_temp_setup_by_index_t *usb_temp_setup_by_index_p = &usb_temp_setup_by_index_w;
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usb_temp_unsetup_t *usb_temp_unsetup_p = &usb_temp_unsetup_w;
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usb_test_quirk_t *usb_test_quirk_p = &usb_test_quirk_w;
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usb_quirk_ioctl_t *usb_quirk_ioctl_p = &usb_quirk_ioctl_w;
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devclass_t usb_devclass_ptr = NULL;
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static usb_error_t
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usb_temp_setup_by_index_w(struct usb_device *udev, uint16_t index)
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{
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return (USB_ERR_INVAL);
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}
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static uint8_t
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usb_test_quirk_w(const struct usbd_lookup_info *info, uint16_t quirk)
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{
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return (0); /* no match */
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}
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static int
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usb_quirk_ioctl_w(unsigned long cmd, caddr_t data, int fflag, struct thread *td)
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{
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return (ENOIOCTL);
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}
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static usb_error_t
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usb_temp_get_desc_w(struct usb_device *udev, struct usb_device_request *req, const void **pPtr, uint16_t *pLength)
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{
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/* stall */
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return (USB_ERR_STALLED);
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}
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static void
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usb_temp_unsetup_w(struct usb_device *udev)
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{
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if (udev->usb_template_ptr) {
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free(udev->usb_template_ptr, M_USB);
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udev->usb_template_ptr = NULL;
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}
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}
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void
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usb_quirk_unload(void *arg)
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{
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/* reset function pointers */
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usb_test_quirk_p = &usb_test_quirk_w;
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usb_quirk_ioctl_p = &usb_quirk_ioctl_w;
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/* wait for CPU to exit the loaded functions, if any */
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/* XXX this is a tradeoff */
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pause("WAIT", hz);
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}
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void
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usb_temp_unload(void *arg)
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{
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/* reset function pointers */
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usb_temp_get_desc_p = &usb_temp_get_desc_w;
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usb_temp_setup_by_index_p = &usb_temp_setup_by_index_w;
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usb_temp_unsetup_p = &usb_temp_unsetup_w;
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/* wait for CPU to exit the loaded functions, if any */
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/* XXX this is a tradeoff */
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pause("WAIT", hz);
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}
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void
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usb_bus_unload(void *arg)
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{
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/* reset function pointers */
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usb_devclass_ptr = NULL;
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/* wait for CPU to exit the loaded functions, if any */
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/* XXX this is a tradeoff */
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pause("WAIT", hz);
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}
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