LXR linux/tools/usb/usbip/libsrc/usbip_host

   1/*
   2 * Copyright (C) 2015-2016 Samsung Electronics
   3 *               Igor Kotrasinski <i.kotrasinsk@samsung.com>
   4 *               Krzysztof Opasiak <k.opasiak@samsung.com>
   5 *
   6 * Refactored from usbip_host_driver.c, which is:
   7 * Copyright (C) 2011 matt mooney <mfm@muteddisk.com>
   8 *               2005-2007 Takahiro Hirofuchi
   9 *
  10 * This program is free software: you can redistribute it and/or modify
  11 * it under the terms of the GNU General Public License as published by
  12 * the Free Software Foundation, either version 2 of the License, or
  13 * (at your option) any later version.
  14 *
  15 * This program is distributed in the hope that it will be useful,
  16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  18 * GNU General Public License for more details.
  19 *
  20 * You should have received a copy of the GNU General Public License
  21 * along with this program. If not, see <http://www.gnu.org/licenses/>.
  22 */
  23
  24#ifndef __USBIP_HOST_COMMON_H
  25#define __USBIP_HOST_COMMON_H
  26
  27#include <stdint.h>
  28#include <libudev.h>
  29#include <errno.h>
  30#include "list.h"
  31#include "usbip_common.h"
  32#include "sysfs_utils.h"
  33
  34struct usbip_host_driver;
  35
  36struct usbip_host_driver_ops {
  37        int (*open)(struct usbip_host_driver *hdriver);
  38        void (*close)(struct usbip_host_driver *hdriver);
  39        int (*refresh_device_list)(struct usbip_host_driver *hdriver);
  40        struct usbip_exported_device * (*get_device)(
  41                struct usbip_host_driver *hdriver, int num);
  42
  43        int (*read_device)(struct udev_device *sdev,
  44                           struct usbip_usb_device *dev);
  45        int (*read_interface)(struct usbip_usb_device *udev, int i,
  46                              struct usbip_usb_interface *uinf);
  47        int (*is_my_device)(struct udev_device *udev);
  48};
  49
  50struct usbip_host_driver {
  51        int ndevs;
  52        /* list of exported device */
  53        struct list_head edev_list;
  54        const char *udev_subsystem;
  55        struct usbip_host_driver_ops ops;
  56};
  57
  58struct usbip_exported_device {
  59        struct udev_device *sudev;
  60        int32_t status;
  61        struct usbip_usb_device udev;
  62        struct list_head node;
  63        struct usbip_usb_interface uinf[];
  64};
  65
  66/* External API to access the driver */
  67static inline int usbip_driver_open(struct usbip_host_driver *hdriver)
  68{
  69        if (!hdriver->ops.open)
  70                return -EOPNOTSUPP;
  71        return hdriver->ops.open(hdriver);
  72}
  73
  74static inline void usbip_driver_close(struct usbip_host_driver *hdriver)
  75{
  76        if (!hdriver->ops.close)
  77                return;
  78        hdriver->ops.close(hdriver);
  79}
  80
  81static inline int usbip_refresh_device_list(struct usbip_host_driver *hdriver)
  82{
  83        if (!hdriver->ops.refresh_device_list)
  84                return -EOPNOTSUPP;
  85        return hdriver->ops.refresh_device_list(hdriver);
  86}
  87
  88static inline struct usbip_exported_device *
  89usbip_get_device(struct usbip_host_driver *hdriver, int num)
  90{
  91        if (!hdriver->ops.get_device)
  92                return NULL;
  93        return hdriver->ops.get_device(hdriver, num);
  94}
  95
  96/* Helper functions for implementing driver backend */
  97int usbip_generic_driver_open(struct usbip_host_driver *hdriver);
  98void usbip_generic_driver_close(struct usbip_host_driver *hdriver);
  99int usbip_generic_refresh_device_list(struct usbip_host_driver *hdriver);
 100int usbip_export_device(struct usbip_exported_device *edev, int sockfd);
 101struct usbip_exported_device *usbip_generic_get_device(
 102                struct usbip_host_driver *hdriver, int num);
 103
 104#endif /* __USBIP_HOST_COMMON_H */
 105