uboot-phytec

// SPDX-License-Identifier: GPL-2.0+

/*

 * Copyright (C) 2016 Google, Inc

 * Written by Simon Glass <sjg@chromium.org>

 */

​

#include <common.h>

#include <linux/err.h>

​

struct blk_driver *blk_driver_lookup_type(int if_type)

{

    struct blk_driver *drv = ll_entry_start(struct blk_driver, blk_driver);

    const int n_ents = ll_entry_count(struct blk_driver, blk_driver);

    struct blk_driver *entry;

​

    for (entry = drv; entry != drv + n_ents; entry++) {

        if (if_type == entry->if_type)

            return entry;

    }

​

    /* Not found */

    return NULL;

}

​

static struct blk_driver *blk_driver_lookup_typename(const char *if_typename)

{

    struct blk_driver *drv = ll_entry_start(struct blk_driver, blk_driver);

    const int n_ents = ll_entry_count(struct blk_driver, blk_driver);

    struct blk_driver *entry;

​

    for (entry = drv; entry != drv + n_ents; entry++) {

        if (!strcmp(if_typename, entry->if_typename))

            return entry;

    }

​

    /* Not found */

    return NULL;

}

​

const char *blk_get_if_type_name(enum if_type if_type)

{

    struct blk_driver *drv = blk_driver_lookup_type(if_type);

​

    return drv ? drv->if_typename : NULL;

}

​

/**

 * get_desc() - Get the block device descriptor for the given device number

 *

 * @drv:    Legacy block driver

 * @devnum: Device number (0 = first)

 * @descp:  Returns block device descriptor on success

 * @return 0 on success, -ENODEV if there is no such device, -ENOSYS if the

 * driver does not provide a way to find a device, or other -ve on other

 * error.

 */

static int get_desc(struct blk_driver *drv, int devnum, struct blk_desc **descp)

{

    if (drv->desc) {

        if (devnum < 0 || devnum >= drv->max_devs)

            return -ENODEV;

        *descp = &drv->desc[devnum];

        return 0;