source: mainline/uspace/drv/char/pl011/main.c@ 7348c4b

/*
 * Copyright (c) 2018 Petr Pavlu
 * 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 uspace_drv_pl011
 * @{
 */
/** @file ARM PrimeCell PL011 UART driver.
 */

#include <ddf/driver.h>
#include <ddf/log.h>
#include <device/hw_res_parsed.h>
#include <errno.h>
#include <stdio.h>

#include "pl011.h"

#define NAME  "pl011"

static errno_t pl011_dev_add(ddf_dev_t *dev);
static errno_t pl011_dev_remove(ddf_dev_t *dev);
static errno_t pl011_dev_gone(ddf_dev_t *dev);
static errno_t pl011_fun_online(ddf_fun_t *fun);
static errno_t pl011_fun_offline(ddf_fun_t *fun);

static driver_ops_t driver_ops = {
        .dev_add = pl011_dev_add,
        .dev_remove = pl011_dev_remove,
        .dev_gone = pl011_dev_gone,
        .fun_online = pl011_fun_online,
        .fun_offline = pl011_fun_offline
};

static driver_t pl011_driver = {
        .name = NAME,
        .driver_ops = &driver_ops
};

static errno_t pl011_get_res(ddf_dev_t *dev, pl011_res_t *res)
{
        async_sess_t *parent_sess;
        hw_res_list_parsed_t hw_res;
        errno_t rc;

        parent_sess = ddf_dev_parent_sess_get(dev);
        if (parent_sess == NULL)
                return ENOMEM;

        hw_res_list_parsed_init(&hw_res);
        rc = hw_res_get_list_parsed(parent_sess, &hw_res, 0);
        if (rc != EOK)
                return rc;

        if (hw_res.mem_ranges.count != 1) {
                rc = EINVAL;
                goto error;
        }

        res->base = RNGABS(hw_res.mem_ranges.ranges[0]);

        if (hw_res.irqs.count != 1) {
                rc = EINVAL;
                goto error;
        }

        res->irq = hw_res.irqs.irqs[0];

        return EOK;
error:
        hw_res_list_parsed_clean(&hw_res);
        return rc;
}

static errno_t pl011_dev_add(ddf_dev_t *dev)
{
        pl011_t *pl011;
        pl011_res_t res;
        errno_t rc;

        ddf_msg(LVL_DEBUG, "pl011_dev_add(%p)", dev);

        pl011 = ddf_dev_data_alloc(dev, sizeof(pl011_t));
        if (pl011 == NULL) {
                ddf_msg(LVL_ERROR, "Failed allocating soft state.");
                return ENOMEM;
        }

        pl011->dev = dev;

        rc = pl011_get_res(dev, &res);
        if (rc != EOK) {
                ddf_msg(LVL_ERROR, "Failed getting hardware resource list.");
                return EIO;
        }

        return pl011_add(pl011, &res);
}

static errno_t pl011_dev_remove(ddf_dev_t *dev)
{
        pl011_t *pl011 = (pl011_t *)ddf_dev_data_get(dev);

        ddf_msg(LVL_DEBUG, "pl011_dev_remove(%p)", dev);

        return pl011_remove(pl011);
}

static errno_t pl011_dev_gone(ddf_dev_t *dev)
{
        pl011_t *pl011 = (pl011_t *)ddf_dev_data_get(dev);

        ddf_msg(LVL_DEBUG, "pl011_dev_gone(%p)", dev);

        return pl011_gone(pl011);
}

static errno_t pl011_fun_online(ddf_fun_t *fun)
{
        ddf_msg(LVL_DEBUG, "pl011_fun_online()");
        return ddf_fun_online(fun);
}

static errno_t pl011_fun_offline(ddf_fun_t *fun)
{
        ddf_msg(LVL_DEBUG, "pl011_fun_offline()");
        return ddf_fun_offline(fun);
}

int main(int argc, char *argv[])
{
        printf(NAME ": PL011 serial device driver\n");
        ddf_log_init(NAME);
        return ddf_driver_main(&pl011_driver);
}

/** @}
 */