libusb/os/null_usb.c

   1 /*
   2  * Copyright © 2019 Pino Toscano <toscano.pino@tiscali.it>
   3  *
   4  * This library is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Lesser General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2.1 of the License, or (at your option) any later version.
   8  *
   9  * This library is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Lesser General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Lesser General Public
  15  * License along with this library; if not, write to the Free Software
  16  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  17  */
  18
  19 #include "libusbi.h"
  20
  21 static int
  22 null_get_device_list(struct libusb_context * ctx,
  23         struct discovered_devs **discdevs)
  24 {
  25         return LIBUSB_SUCCESS;
  26 }
  27
  28 static int
  29 null_open(struct libusb_device_handle *handle)
  30 {
  31         return LIBUSB_ERROR_NOT_SUPPORTED;
  32 }
  33
  34 static void
  35 null_close(struct libusb_device_handle *handle)
  36 {
  37 }
  38
  39 static int
  40 null_get_device_descriptor(struct libusb_device *dev, unsigned char *buf,
  41     int *host_endian)
  42 {
  43         return LIBUSB_ERROR_NOT_SUPPORTED;
  44 }
  45
  46 static int
  47 null_get_active_config_descriptor(struct libusb_device *dev,
  48     unsigned char *buf, size_t len, int *host_endian)
  49 {
  50         return LIBUSB_ERROR_NOT_SUPPORTED;
  51 }
  52
  53 static int
  54 null_get_config_descriptor(struct libusb_device *dev, uint8_t idx,
  55     unsigned char *buf, size_t len, int *host_endian)
  56 {
  57         return LIBUSB_ERROR_NOT_SUPPORTED;
  58 }
  59
  60 static int
  61 null_set_configuration(struct libusb_device_handle *handle, int config)
  62 {
  63         return LIBUSB_ERROR_NOT_SUPPORTED;
  64 }
  65
  66 static int
  67 null_claim_interface(struct libusb_device_handle *handle, int iface)
  68 {
  69         return LIBUSB_ERROR_NOT_SUPPORTED;
  70 }
  71
  72 static int
  73 null_release_interface(struct libusb_device_handle *handle, int iface)
  74 {
  75         return LIBUSB_ERROR_NOT_SUPPORTED;
  76 }
  77
  78 static int
  79 null_set_interface_altsetting(struct libusb_device_handle *handle, int iface,
  80     int altsetting)
  81 {
  82         return LIBUSB_ERROR_NOT_SUPPORTED;
  83 }
  84
  85 static int
  86 null_clear_halt(struct libusb_device_handle *handle, unsigned char endpoint)
  87 {
  88         return LIBUSB_ERROR_NOT_SUPPORTED;
  89 }
  90
  91 static int
  92 null_reset_device(struct libusb_device_handle *handle)
  93 {
  94         return LIBUSB_ERROR_NOT_SUPPORTED;
  95 }
  96
  97 static int
  98 null_submit_transfer(struct usbi_transfer *itransfer)
  99 {
 100         return LIBUSB_ERROR_NOT_SUPPORTED;
 101 }
 102
 103 static int
 104 null_cancel_transfer(struct usbi_transfer *itransfer)
 105 {
 106         return LIBUSB_ERROR_NOT_SUPPORTED;
 107 }
 108
 109 static void
 110 null_clear_transfer_priv(struct usbi_transfer *itransfer)
 111 {
 112 }
 113
 114 static int
 115 null_handle_transfer_completion(struct usbi_transfer *itransfer)
 116 {
 117         return LIBUSB_ERROR_NOT_SUPPORTED;
 118 }
 119
 120 static int
 121 null_clock_gettime(int clkid, struct timespec *tp)
 122 {
 123         switch (clkid) {
 124         case USBI_CLOCK_MONOTONIC:
 125                 return clock_gettime(CLOCK_REALTIME, tp);
 126         case USBI_CLOCK_REALTIME:
 127                 return clock_gettime(CLOCK_REALTIME, tp);
 128         default:
 129                 return LIBUSB_ERROR_INVALID_PARAM;
 130         }
 131 }
 132
 133 const struct usbi_os_backend usbi_backend = {
 134         .name = "Null backend",
 135         .caps = 0,
 136         .init = NULL,
 137         .exit = NULL,
 138         .set_option = NULL,
 139         .get_device_list = null_get_device_list,
 140         .hotplug_poll = NULL,
 141         .wrap_sys_device = NULL,
 142         .open = null_open,
 143         .close = null_close,
 144         .get_device_descriptor = null_get_device_descriptor,
 145         .get_active_config_descriptor = null_get_active_config_descriptor,
 146         .get_config_descriptor = null_get_config_descriptor,
 147         .get_config_descriptor_by_value = NULL,
 148         .get_configuration = NULL,
 149         .set_configuration = null_set_configuration,
 150         .claim_interface = null_claim_interface,
 151         .release_interface = null_release_interface,
 152         .set_interface_altsetting = null_set_interface_altsetting,
 153         .clear_halt = null_clear_halt,
 154         .reset_device = null_reset_device,
 155         .alloc_streams = NULL,
 156         .free_streams = NULL,
 157         .dev_mem_alloc = NULL,
 158         .dev_mem_free = NULL,
 159         .kernel_driver_active = NULL,
 160         .detach_kernel_driver = NULL,
 161         .attach_kernel_driver = NULL,
 162         .destroy_device = NULL,
 163         .submit_transfer = null_submit_transfer,
 164         .cancel_transfer = null_cancel_transfer,
 165         .clear_transfer_priv = null_clear_transfer_priv,
 166         .handle_events = NULL,
 167         .handle_transfer_completion = null_handle_transfer_completion,
 168         .clock_gettime = null_clock_gettime,
 169 #ifdef USBI_TIMERFD_AVAILABLE
 170         .get_timerfd_clockid = NULL,
 171 #endif
 172         .context_priv_size = 0,
 173         .device_priv_size = 0,
 174         .device_handle_priv_size = 0,
 175         .transfer_priv_size = 0,
 176 };