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__)
28 struct priv {
29 const void __iomem *data;
30 int size;
31 };
32
33 static u32
of_read(void * data,u32 offset,u32 length,struct nvkm_bios * bios)34 of_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
45 static u32
of_size(void * data)46 of_size(void *data)
47 {
48 struct priv *priv = data;
49 return priv->size;
50 }
51
52 static void *
of_init(struct nvkm_bios * bios,const char * name)53 of_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
of_fini(void * p)69 static void of_fini(void *p)
70 {
71 kfree(p);
72 }
73
74 const struct nvbios_source
75 nvbios_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
86 const struct nvbios_source
87 nvbios_of = {
88 };
89 #endif
90