1/*
2 * Copyright 2012 Red Hat Inc.
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
10 *
11 * The above copyright notice and this permission notice shall be included in
12 * all copies or substantial portions of the Software.
13 *
14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
18 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
20 * OTHER DEALINGS IN THE SOFTWARE.
21 *
22 */
23#include "priv.h"
24
25#include <core/pci.h>
26
27#if defined(__powerpc__)
28struct priv {
29	const void __iomem *data;
30	int size;
31};
32
33static u32
34of_read(void *data, u32 offset, u32 length, struct nvkm_bios *bios)
35{
36	struct priv *priv = data;
37	if (offset < priv->size) {
38		length = min_t(u32, length, priv->size - offset);
39		memcpy_fromio(bios->data + offset, priv->data + offset, length);
40		return length;
41	}
42	return 0;
43}
44
45static u32
46of_size(void *data)
47{
48	struct priv *priv = data;
49	return priv->size;
50}
51
52static void *
53of_init(struct nvkm_bios *bios, const char *name)
54{
55	struct nvkm_device *device = bios->subdev.device;
56	struct pci_dev *pdev = device->func->pci(device)->pdev;
57	struct device_node *dn;
58	struct priv *priv;
59	if (!(dn = pci_device_to_OF_node(pdev)))
60		return ERR_PTR(-ENODEV);
61	if (!(priv = kzalloc(sizeof(*priv), GFP_KERNEL)))
62		return ERR_PTR(-ENOMEM);
63	if ((priv->data = of_get_property(dn, "NVDA,BMP", &priv->size)))
64		return priv;
65	kfree(priv);
66	return ERR_PTR(-EINVAL);
67}
68
69static void of_fini(void *p)
70{
71	kfree(p);
72}
73
74const struct nvbios_source
75nvbios_of = {
76	.name = "OpenFirmware",
77	.init = of_init,
78	.fini = of_fini,
79	.read = of_read,
80	.size = of_size,
81	.rw = false,
82	.ignore_checksum = true,
83	.no_pcir = true,
84};
85#else
86const struct nvbios_source
87nvbios_of = {
88};
89#endif
90