HelenOS sources

root/uspace/drv/bus/usb/uhci/main.c

DEFINITIONS

1. disable_legacy
2. main

/*
 * Copyright (c) 2025 Jiri Svoboda
 * Copyright (c) 2011 Vojtech Horky, Jan Vesely
 * Copyright (c) 2018 Ondrej Hlavaty, Petr Manek
 * 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 drvusbuhci
 * @{
 */
/** @file
 * @brief UHCI driver initialization
 */

#include <assert.h>
#include <ddf/driver.h>
#include <errno.h>
#include <io/log.h>
#include <io/logctl.h>
#include <pci_dev_iface.h>
#include <stdio.h>
#include <str_error.h>
#include <usb/debug.h>
#include <usb/host/utility.h>

#include "hc.h"

#define NAME "uhci"

static errno_t disable_legacy(hc_device_t *);

static const hc_driver_t uhci_driver = {
        .name = NAME,
        .hc_device_size = sizeof(hc_t),
        .claim = disable_legacy,
        .irq_code_gen = hc_gen_irq_code,
        .hc_add = hc_add,
        .start = hc_start,
        .setup_root_hub = hc_setup_roothub,
        .hc_gone = hc_gone,
        .hc_quiesce = hc_quiesce
};

/** Call the PCI driver with a request to clear legacy support register
 *
 * @param[in] device Device asking to disable interrupts
 * @return Error code.
 */
static errno_t disable_legacy(hc_device_t *hcd)
{
        assert(hcd);

        async_sess_t *parent_sess = ddf_dev_parent_sess_get(hcd->ddf_dev);
        if (parent_sess == NULL)
                return ENOMEM;

        /*
         * See UHCI design guide page 45 for these values.
         * Write all WC bits in USB legacy register
         */
        return pci_config_space_write_16(parent_sess, 0xc0, 0xaf00);
}

/** Initialize global driver structures (NONE).
 *
 * @param[in] argc Number of arguments in argv vector (ignored).
 * @param[in] argv Cmdline argument vector (ignored).
 * @return Error code.
 *
 * Driver debug level is set here.
 */
int main(int argc, char *argv[])
{
        printf(NAME ": HelenOS UHCI driver.\n");
        log_init(NAME);
        logctl_set_log_level(NAME, LVL_NOTE);
        return hc_driver_main(&uhci_driver);
}
/**
 * @}
 */