source: mainline/uspace/lib/drv/generic/remote_usb.c@ f787c8e

/*
 * Copyright (c) 2010 Vojtech Horky
 * Copyright (c) 2011 Jan Vesely
 * Copyright (c) 2018 Michal Staruch, Ondrej Hlavaty
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * - 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.
 * - The name of the author may not be used to endorse or promote products
 *   derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 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.
 */

/** @addtogroup libdrv
 * @{
 */
/** @file
 */

#include <async.h>
#include <assert.h>
#include <macros.h>
#include <errno.h>
#include <devman.h>

#include "usb_iface.h"
#include "ddf/driver.h"


usb_dev_session_t *usb_dev_connect(devman_handle_t handle)
{
        return devman_device_connect(handle, IPC_FLAG_BLOCKING);
}

usb_dev_session_t *usb_dev_connect_to_self(ddf_dev_t *dev)
{
        return devman_parent_device_connect(ddf_dev_get_handle(dev),
            IPC_FLAG_BLOCKING);
}

void usb_dev_disconnect(usb_dev_session_t *sess)
{
        if (sess)
                async_hangup(sess);
}

typedef enum {
        IPC_M_USB_GET_MY_DESCRIPTION,
} usb_iface_funcs_t;

/** Tell interface number given device can use.
 * @param[in] exch IPC communication exchange
 * @param[in] handle Id of the device
 * @param[out] usb_iface Assigned USB interface
 * @return Error code.
 */
errno_t usb_get_my_description(async_exch_t *exch, usb_device_desc_t *desc)
{
        if (!exch)
                return EBADMEM;

        sysarg_t address, depth, speed, handle, iface;

        const errno_t ret = async_req_1_5(exch, DEV_IFACE_ID(USB_DEV_IFACE),
            IPC_M_USB_GET_MY_DESCRIPTION, &address, &depth, &speed, &handle,
            &iface);
        if (ret == EOK && desc) {
                *desc = (usb_device_desc_t) {
                        .address = address,
                        .depth = depth,
                        .speed = speed,
                        .handle = handle,
                        .iface = iface,
                };
        }

        return ret;
}

static void remote_usb_get_my_description(ddf_fun_t *, void *, ipc_call_t *);

/** Remote USB interface operations. */
static const remote_iface_func_ptr_t remote_usb_iface_ops [] = {
        [IPC_M_USB_GET_MY_DESCRIPTION] = remote_usb_get_my_description,
};

/** Remote USB interface structure.
 */
const remote_iface_t remote_usb_iface = {
        .method_count = ARRAY_SIZE(remote_usb_iface_ops),
        .methods = remote_usb_iface_ops,
};

void remote_usb_get_my_description(ddf_fun_t *fun, void *iface,
    ipc_call_t *call)
{
        const usb_iface_t *usb_iface = (usb_iface_t *) iface;

        if (usb_iface->get_my_description == NULL) {
                async_answer_0(call, ENOTSUP);
                return;
        }

        usb_device_desc_t desc;
        const errno_t ret = usb_iface->get_my_description(fun, &desc);
        if (ret != EOK) {
                async_answer_0(call, ret);
        } else {
                async_answer_5(call, EOK,
                    (sysarg_t) desc.address,
                    (sysarg_t) desc.depth,
                    (sysarg_t) desc.speed,
                    desc.handle,
                    desc.iface);
        }
}

/**
 * @}
 */