stdreq.c

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/*
 * Copyright (c) 2011 Vojtech Horky
 * 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.
 */

#include <errno.h>
#include <usb/debug.h>
#include <usb/descriptor.h>
#include "stdreq.h"
#include "virthid.h"

#define VUHID_DATA(vuhid, device) \
        vuhid_data_t *vuhid = device->device_data

int req_get_descriptor(usbvirt_device_t *device,
    const usb_device_request_setup_packet_t *setup_packet,
    uint8_t *data, size_t *act_size)
{
        VUHID_DATA(vuhid, device);

        if (setup_packet->value_high == USB_DESCTYPE_HID_REPORT) {
                vuhid_interface_t *iface
                    = vuhid->interface_mapping[setup_packet->index];
                if (iface == NULL) {
                        return EFORWARD;
                }
                if (iface->report_descriptor != NULL) {
                        usbvirt_control_reply_helper(setup_packet,
                            data, act_size,
                            iface->report_descriptor,
                            iface->report_descriptor_size);
                        return EOK;
                } else {
                        return ENOENT;
                }
        }
        
        /* Let the framework handle all the rest. */
        return EFORWARD;
}

int req_set_protocol(usbvirt_device_t *device,
    const usb_device_request_setup_packet_t *setup_packet,
    uint8_t *data, size_t *act_size)
{
        VUHID_DATA(vuhid, device);

        size_t iface_index = setup_packet->index;
        int protocol = setup_packet->value;

        // FIXME - check ranges
        vuhid_interface_t *iface = vuhid->interface_mapping[iface_index];
        if (iface == NULL) {
                return ENOENT;
        }
        iface->set_protocol = protocol;

        return EOK;
}

int req_set_report(usbvirt_device_t *device,
    const usb_device_request_setup_packet_t *setup_packet,
    uint8_t *data, size_t *act_size)
{
        VUHID_DATA(vuhid, device);

        size_t iface_index = setup_packet->index;

        // FIXME - check ranges
        vuhid_interface_t *iface = vuhid->interface_mapping[iface_index];
        if (iface == NULL) {
                return ENOENT;
        }

        size_t data_length = setup_packet->length;
        if (iface->on_data_out == NULL) {
                return ENOTSUP;
        }

        /* SET_REPORT is translated to data out */
        int rc = iface->on_data_out(iface, data, data_length);

        return rc;
}

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