source: mainline/uspace/drv/usbhid/hidreq.c@ 2391aaf

/*
 * Copyright (c) 2011 Lubos Slovak
 * 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 drvusbhid
 * @{
 */
/** @file
 * HID class-specific requests.
 */

#include <stdint.h>
#include <errno.h>
#include <str_error.h>

#include <usb/classes/hid.h>
#include <usb/debug.h>
#include <usb/request.h>

#include "hidreq.h"
#include "hiddev.h"

/*----------------------------------------------------------------------------*/

int usbhid_req_set_report(usbhid_dev_t *hid_dev,
    usb_hid_report_type_t type, uint8_t *buffer, size_t buf_size)
{
        if (hid_dev == NULL) {
                usb_log_error("usbhid_req_set_report(): no HID device structure"
                    " given.\n");
                return EINVAL;
        }
        
        /*
         * No need for checking other parameters, as they are checked in
         * the called function (usb_control_request_set()).
         */
        
        int rc, sess_rc;
        
        sess_rc = usb_endpoint_pipe_start_session(&hid_dev->ctrl_pipe);
        if (sess_rc != EOK) {
                usb_log_warning("Failed to start a session: %s.\n",
                    str_error(sess_rc));
                return sess_rc;
        }

        usb_log_debug("Sending Set_Report request to the device.\n");
        
        rc = usb_control_request_set(&hid_dev->ctrl_pipe, 
            USB_REQUEST_TYPE_CLASS, USB_REQUEST_RECIPIENT_INTERFACE, 
            USB_HIDREQ_SET_REPORT, type, hid_dev->iface, buffer, buf_size);

        sess_rc = usb_endpoint_pipe_end_session(&hid_dev->ctrl_pipe);

        if (rc != EOK) {
                usb_log_warning("Error sending output report to the keyboard: "
                    "%s.\n", str_error(rc));
                return rc;
        }

        if (sess_rc != EOK) {
                usb_log_warning("Error closing session: %s.\n",
                    str_error(sess_rc));
                return sess_rc;
        }
        
        return EOK;
}

/*----------------------------------------------------------------------------*/

int usbhid_req_set_protocol(usbhid_dev_t *hid_dev, usb_hid_protocol_t protocol)
{
        if (hid_dev == NULL) {
                usb_log_error("usbhid_req_set_protocol(): no HID device "
                    "structure given.\n");
                return EINVAL;
        }
        
        /*
         * No need for checking other parameters, as they are checked in
         * the called function (usb_control_request_set()).
         */
        
        int rc, sess_rc;
        
        sess_rc = usb_endpoint_pipe_start_session(&hid_dev->ctrl_pipe);
        if (sess_rc != EOK) {
                usb_log_warning("Failed to start a session: %s.\n",
                    str_error(sess_rc));
                return sess_rc;
        }

        usb_log_debug("Sending Set_Protocol request to the device ("
            "protocol: %d, iface: %d).\n", protocol, hid_dev->iface);
        
        rc = usb_control_request_set(&hid_dev->ctrl_pipe, 
            USB_REQUEST_TYPE_CLASS, USB_REQUEST_RECIPIENT_INTERFACE, 
            USB_HIDREQ_SET_PROTOCOL, protocol, hid_dev->iface, NULL, 0);

        sess_rc = usb_endpoint_pipe_end_session(&hid_dev->ctrl_pipe);

        if (rc != EOK) {
                usb_log_warning("Error sending output report to the keyboard: "
                    "%s.\n", str_error(rc));
                return rc;
        }

        if (sess_rc != EOK) {
                usb_log_warning("Error closing session: %s.\n",
                    str_error(sess_rc));
                return sess_rc;
        }
        
        return EOK;
}

/*----------------------------------------------------------------------------*/

/**
 * @}
 */