1 /* $FreeBSD: head/sys/dev/usb/usb_dynamic.c 250207 2013-05-03 11:10:04Z hselasky $ */ 2 /*- 3 * Copyright (c) 2008 Hans Petter Selasky. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 */ 26 27 #include <sys/stdint.h> 28 #include <sys/param.h> 29 #include <sys/queue.h> 30 #include <sys/types.h> 31 #include <sys/systm.h> 32 #include <sys/kernel.h> 33 #include <sys/bus.h> 34 #include <sys/module.h> 35 #include <sys/lock.h> 36 #include <sys/condvar.h> 37 #include <sys/sysctl.h> 38 #include <sys/unistd.h> 39 #include <sys/callout.h> 40 #include <sys/malloc.h> 41 #include <sys/priv.h> 42 43 #include <bus/u4b/usb.h> 44 #include <bus/u4b/usbdi.h> 45 46 #include <bus/u4b/usb_core.h> 47 #include <bus/u4b/usb_process.h> 48 #include <bus/u4b/usb_device.h> 49 #include <bus/u4b/usb_dynamic.h> 50 #include <bus/u4b/usb_request.h> 51 52 /* function prototypes */ 53 static usb_handle_req_t usb_temp_get_desc_w; 54 static usb_temp_setup_by_index_t usb_temp_setup_by_index_w; 55 static usb_temp_unsetup_t usb_temp_unsetup_w; 56 static usb_test_quirk_t usb_test_quirk_w; 57 static usb_quirk_ioctl_t usb_quirk_ioctl_w; 58 59 /* global variables */ 60 usb_handle_req_t *usb_temp_get_desc_p = &usb_temp_get_desc_w; 61 usb_temp_setup_by_index_t *usb_temp_setup_by_index_p = &usb_temp_setup_by_index_w; 62 usb_temp_unsetup_t *usb_temp_unsetup_p = &usb_temp_unsetup_w; 63 usb_test_quirk_t *usb_test_quirk_p = &usb_test_quirk_w; 64 usb_quirk_ioctl_t *usb_quirk_ioctl_p = &usb_quirk_ioctl_w; 65 devclass_t usb_devclass_ptr = NULL; 66 67 static usb_error_t 68 usb_temp_setup_by_index_w(struct usb_device *udev, uint16_t index) 69 { 70 return (USB_ERR_INVAL); 71 } 72 73 static uint8_t 74 usb_test_quirk_w(const struct usbd_lookup_info *info, uint16_t quirk) 75 { 76 return (0); /* no match */ 77 } 78 79 static int 80 usb_quirk_ioctl_w(unsigned long cmd, caddr_t data, int fflag, struct thread *td) 81 { 82 return (ENOIOCTL); 83 } 84 85 static usb_error_t 86 usb_temp_get_desc_w(struct usb_device *udev, struct usb_device_request *req, const void **pPtr, uint16_t *pLength) 87 { 88 /* stall */ 89 return (USB_ERR_STALLED); 90 } 91 92 static void 93 usb_temp_unsetup_w(struct usb_device *udev) 94 { 95 if(udev->usb_template_ptr) { 96 usbd_free_config_desc(udev, udev->usb_template_ptr); 97 udev->usb_template_ptr = NULL; 98 } 99 } 100 101 void 102 usb_quirk_unload(void *arg) 103 { 104 /* reset function pointers */ 105 106 usb_test_quirk_p = &usb_test_quirk_w; 107 usb_quirk_ioctl_p = &usb_quirk_ioctl_w; 108 109 /* wait for CPU to exit the loaded functions, if any */ 110 111 /* XXX this is a tradeoff */ 112 113 tsleep(usb_quirk_unload, 0, "WAIT", hz); 114 } 115 116 void 117 usb_temp_unload(void *arg) 118 { 119 /* reset function pointers */ 120 121 usb_temp_get_desc_p = &usb_temp_get_desc_w; 122 usb_temp_setup_by_index_p = &usb_temp_setup_by_index_w; 123 usb_temp_unsetup_p = &usb_temp_unsetup_w; 124 125 /* wait for CPU to exit the loaded functions, if any */ 126 127 /* XXX this is a tradeoff */ 128 129 tsleep(usb_quirk_unload, 0, "WAIT", hz); 130 } 131 132 void 133 usb_bus_unload(void *arg) 134 { 135 /* reset function pointers */ 136 137 usb_devclass_ptr = NULL; 138 139 /* wait for CPU to exit the loaded functions, if any */ 140 141 /* XXX this is a tradeoff */ 142 143 tsleep(usb_quirk_unload, 0, "WAIT", hz); 144 } 145