/*
 * Copyright 2012 Red Hat Inc.
 *
 * 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 COPYRIGHT HOLDER(S) OR AUTHOR(S) 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 "priv.h"

#include <core/pci.h>

#if defined(__powerpc__)
struct priv {
        const void __iomem *data;
        int size;
};

static u32
of_read(void *data, u32 offset, u32 length, struct nvkm_bios *bios)
{
        struct priv *priv = data;
        if (offset < priv->size) {
                length = min_t(u32, length, priv->size - offset);
                memcpy_fromio(bios->data + offset, priv->data + offset, length);
                return length;
        }
        return 0;
}

static u32
of_size(void *data)
{
        struct priv *priv = data;
        return priv->size;
}

static void *
of_init(struct nvkm_bios *bios, const char *name)
{
        struct nvkm_device *device = bios->subdev.device;
        struct pci_dev *pdev = device->func->pci(device)->pdev;
        struct device_node *dn;
        struct priv *priv;
        if (!(dn = pci_device_to_OF_node(pdev)))
                return ERR_PTR(-ENODEV);
        if (!(priv = kzalloc_obj(*priv)))
                return ERR_PTR(-ENOMEM);
        if ((priv->data = of_get_property(dn, "NVDA,BMP", &priv->size)))
                return priv;
        kfree(priv);
        return ERR_PTR(-EINVAL);
}

static void of_fini(void *p)
{
        kfree(p);
}

const struct nvbios_source
nvbios_of = {
        .name = "OpenFirmware",
        .init = of_init,
        .fini = of_fini,
        .read = of_read,
        .size = of_size,
        .rw = false,
        .ignore_checksum = true,
        .no_pcir = true,
};
#else
const struct nvbios_source
nvbios_of = {
};
#endif