90 lines
2.4 KiB
C
90 lines
2.4 KiB
C
/*
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* Copyright 2012 Red Hat Inc.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
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* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*
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*/
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#include "priv.h"
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#include <core/pci.h>
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#if defined(__powerpc__)
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struct priv {
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const void __iomem *data;
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int size;
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};
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static u32
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of_read(void *data, u32 offset, u32 length, struct nvkm_bios *bios)
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{
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struct priv *priv = data;
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if (offset < priv->size) {
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length = min_t(u32, length, priv->size - offset);
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memcpy_fromio(bios->data + offset, priv->data + offset, length);
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return length;
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}
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return 0;
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}
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static u32
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of_size(void *data)
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{
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struct priv *priv = data;
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return priv->size;
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}
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static void *
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of_init(struct nvkm_bios *bios, const char *name)
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{
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struct nvkm_device *device = bios->subdev.device;
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struct pci_dev *pdev = device->func->pci(device)->pdev;
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struct device_node *dn;
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struct priv *priv;
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if (!(dn = pci_device_to_OF_node(pdev)))
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return ERR_PTR(-ENODEV);
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if (!(priv = kzalloc(sizeof(*priv), GFP_KERNEL)))
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return ERR_PTR(-ENOMEM);
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if ((priv->data = of_get_property(dn, "NVDA,BMP", &priv->size)))
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return priv;
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kfree(priv);
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return ERR_PTR(-EINVAL);
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}
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static void of_fini(void *p)
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{
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kfree(p);
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}
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const struct nvbios_source
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nvbios_of = {
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.name = "OpenFirmware",
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.init = of_init,
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.fini = of_fini,
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.read = of_read,
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.size = of_size,
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.rw = false,
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.ignore_checksum = true,
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.no_pcir = true,
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};
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#else
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const struct nvbios_source
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nvbios_of = {
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};
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#endif
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