source: mainline/uspace/drv/bus/usb/uhci/main.c@ f9599b9c

/*
 * Copyright (c) 2011 Vojtech Horky, Jan Vesely
 * 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 <devman.h>
#include <errno.h>
#include <io/log.h>
#include <pci_dev_iface.h>
#include <stdio.h>
#include <str_error.h>
#include <usb/debug.h>
#include <usb/host/ddf_helpers.h>

#include "hc.h"

#define NAME "uhci"

static int uhci_driver_init(hcd_t *hcd, const hw_res_list_parsed_t *res, bool irq)
{
        assert(hcd);
        assert(hcd->driver.data == NULL);

        hc_t *instance = malloc(sizeof(hc_t));
        if (!instance)
                return ENOMEM;

        const int ret = hc_init(instance, res, irq);
        if (ret == EOK)
                hcd_set_implementation(hcd, instance, uhci_hc_schedule, NULL,
                    NULL, uhci_hc_interrupt, uhci_hc_status);
        return ret;
}

static void uhci_driver_fini(hcd_t *hcd)
{
        assert(hcd);
        if (hcd->driver.data)
                hc_fini(hcd->driver.data);

        free(hcd->driver.data);
        hcd_set_implementation(hcd, NULL, NULL, NULL, NULL, NULL, NULL);
}

static int uhci_dev_add(ddf_dev_t *device);

static const driver_ops_t uhci_driver_ops = {
        .dev_add = uhci_dev_add,
};

static const driver_t uhci_driver = {
        .name = NAME,
        .driver_ops = &uhci_driver_ops
};

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

        async_sess_t *parent_sess = devman_parent_device_connect(
            EXCHANGE_SERIALIZE, ddf_dev_get_handle(device), IPC_FLAG_BLOCKING);
        if (!parent_sess)
                return ENOMEM;

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

        async_hangup(parent_sess);
        return rc;
}

/** Initialize a new ddf driver instance for uhci hc and hub.
 *
 * @param[in] device DDF instance of the device to initialize.
 * @return Error code.
 */
int uhci_dev_add(ddf_dev_t *device)
{
        usb_log_debug2("uhci_dev_add() called\n");
        assert(device);

        int ret = disable_legacy(device);
        if (ret != EOK) {
                usb_log_error("Failed to disable legacy USB: %s.\n",
                    str_error(ret));
                return ret;
        }


        ret = ddf_hcd_device_setup_all(device, USB_SPEED_FULL,
            BANDWIDTH_AVAILABLE_USB11, bandwidth_count_usb11,
            ddf_hcd_gen_irq_handler, uhci_hc_gen_irq_code,
            uhci_driver_init, uhci_driver_fini);
        if (ret != EOK) {
                usb_log_error("Failed to initialize UHCI driver: %s.\n",
                    str_error(ret));
        } else {
                usb_log_info("Controlling new UHCI device '%s'.\n",
                    ddf_dev_get_name(device));
        }

        return ret;
}

/** 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);

        return ddf_driver_main(&uhci_driver);
}
/**
 * @}
 */