source: mainline/uspace/drv/char/sun4v-con/main.c

/*
 * Copyright (c) 2017 Jiri Svoboda
 * 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_sun4v_con
 * @file Sun4v console driver
 * @{
 */

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

#include "sun4v-con.h"

#define NAME  "sun4v-con"

static errno_t sun4v_con_dev_add(ddf_dev_t *dev);
static errno_t sun4v_con_dev_remove(ddf_dev_t *dev);
static errno_t sun4v_con_dev_gone(ddf_dev_t *dev);
static errno_t sun4v_con_fun_online(ddf_fun_t *fun);
static errno_t sun4v_con_fun_offline(ddf_fun_t *fun);

static driver_ops_t driver_ops = {
        .dev_add = sun4v_con_dev_add,
        .dev_remove = sun4v_con_dev_remove,
        .dev_gone = sun4v_con_dev_gone,
        .fun_online = sun4v_con_fun_online,
        .fun_offline = sun4v_con_fun_offline
};

static driver_t sun4v_con_driver = {
        .name = NAME,
        .driver_ops = &driver_ops
};

static errno_t sun4v_con_get_res(ddf_dev_t *dev, sun4v_con_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 != 2) {
                rc = EINVAL;
                goto error;
        }

        res->in_base = RNGABS(hw_res.mem_ranges.ranges[0]);
        res->out_base = RNGABS(hw_res.mem_ranges.ranges[1]);
        return EOK;
error:
        hw_res_list_parsed_clean(&hw_res);
        return rc;
}

static errno_t sun4v_con_dev_add(ddf_dev_t *dev)
{
        sun4v_con_t *sun4v_con;
        sun4v_con_res_t res;
        errno_t rc;

        ddf_msg(LVL_DEBUG, "sun4v_con_dev_add(%p)", dev);
        sun4v_con = ddf_dev_data_alloc(dev, sizeof(sun4v_con_t));
        if (sun4v_con == NULL) {
                ddf_msg(LVL_ERROR, "Failed allocating soft state.");
                return ENOMEM;
        }

        sun4v_con->dev = dev;

        rc = sun4v_con_get_res(dev, &res);
        if (rc != EOK) {
                ddf_msg(LVL_ERROR, "Failed getting hardware resource list.\n");
                return EIO;
        }

        return sun4v_con_add(sun4v_con, &res);
}

static errno_t sun4v_con_dev_remove(ddf_dev_t *dev)
{
        sun4v_con_t *sun4v_con = (sun4v_con_t *)ddf_dev_data_get(dev);

        ddf_msg(LVL_DEBUG, "sun4v_con_dev_remove(%p)", dev);

        return sun4v_con_remove(sun4v_con);
}

static errno_t sun4v_con_dev_gone(ddf_dev_t *dev)
{
        sun4v_con_t *sun4v_con = (sun4v_con_t *)ddf_dev_data_get(dev);

        ddf_msg(LVL_DEBUG, "sun4v_con_dev_gone(%p)", dev);

        return sun4v_con_gone(sun4v_con);
}

static errno_t sun4v_con_fun_online(ddf_fun_t *fun)
{
        ddf_msg(LVL_DEBUG, "sun4v_con_fun_online()");
        return ddf_fun_online(fun);
}

static errno_t sun4v_con_fun_offline(ddf_fun_t *fun)
{
        ddf_msg(LVL_DEBUG, "sun4v_con_fun_offline()");
        return ddf_fun_offline(fun);
}

int main(int argc, char *argv[])
{
        printf(NAME ": Sun4v console driver\n");
        ddf_log_init(NAME);
        return ddf_driver_main(&sun4v_con_driver);
}

/** @}
 */