dev/class/block_api.c

/*
 * Copyright (c) 2013 Corey Tabaka
 *
 * Permission is hereby granted, free of charge, to any person obtaining
 * a copy of this software and associated documentation files
 * (the "Software"), to deal in the Software without restriction,
 * including without limitation the rights to use, copy, modify, merge,
 * publish, distribute, sublicense, and/or sell copies of the Software,
 * and to permit persons to whom the Software is furnished to do so,
 * subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be
 * included in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
 * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
 * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */

#include <err.h>
#include <dev/class/block.h>

ssize_t class_block_get_size(struct device *dev)
{
    struct block_ops *ops = device_get_driver_ops(dev, struct block_ops, std);
    if (!ops)
        return ERR_NOT_CONFIGURED;

    if (ops->get_block_size)
        return ops->get_block_size(dev);
    else
        return ERR_NOT_SUPPORTED;
}

ssize_t class_block_get_count(struct device *dev)
{
    struct block_ops *ops = device_get_driver_ops(dev, struct block_ops, std);
    if (!ops)
        return ERR_NOT_CONFIGURED;

    if (ops->get_block_count)
        return ops->get_block_count(dev);
    else
        return ERR_NOT_SUPPORTED;
}

ssize_t class_block_write(struct device *dev, off_t offset, const void *buf, size_t count)
{
    struct block_ops *ops = device_get_driver_ops(dev, struct block_ops, std);
    if (!ops)
        return ERR_NOT_CONFIGURED;

    if (ops->write)
        return ops->write(dev, offset, buf, count);
    else
        return ERR_NOT_SUPPORTED;
}

ssize_t class_block_read(struct device *dev, off_t offset, void *buf, size_t count)
{
    struct block_ops *ops = device_get_driver_ops(dev, struct block_ops, std);
    if (!ops)
        return ERR_NOT_CONFIGURED;

    if (ops->read)
        return ops->read(dev, offset, buf, count);
    else
        return ERR_NOT_SUPPORTED;
}

status_t class_block_flush(struct device *dev)
{
    struct block_ops *ops = device_get_driver_ops(dev, struct block_ops, std);
    if (!ops)
        return ERR_NOT_CONFIGURED;

    if (ops->flush)
        return ops->flush(dev);
    else
        return ERR_NOT_SUPPORTED;
}