1 /*
2 * Copyright 2014 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 * Authors: Ben Skeggs <bskeggs@redhat.com>
23 */
24 #include <subdev/bios.h>
25 #include <subdev/bios/image.h>
26 #include <subdev/bios/pcir.h>
27 #include <subdev/bios/npde.h>
28
29 static bool
30 nvbios_imagen(struct nvkm_bios *bios, struct nvbios_image *image)
31 {
32 struct nvkm_subdev *subdev = &bios->subdev;
33 struct nvbios_pcirT pcir;
34 struct nvbios_npdeT npde;
35 u8 ver;
36 u16 hdr;
37 u32 data;
38
39 switch ((data = nvbios_rd16(bios, image->base + 0x00))) {
40 case 0xaa55:
41 case 0xbb77:
42 case 0x4e56: /* NV */
43 break;
44 default:
45 nvkm_debug(subdev, "%08x: ROM signature (%04x) unknown\n",
46 image->base, data);
47 return false;
48 }
49
50 if (!(data = nvbios_pcirTp(bios, image->base, &ver, &hdr, &pcir)))
51 return false;
52 image->size = pcir.image_size;
53 image->type = pcir.image_type;
54 image->last = pcir.last;
55
56 if (image->type != 0x70) {
57 if (!(data = nvbios_npdeTp(bios, image->base, &npde)))
58 return true;
59 image->size = npde.image_size;
60 image->last = npde.last;
61 } else {
62 image->last = true;
63 }
64
65 return true;
66 }
67
68 bool
69 nvbios_image(struct nvkm_bios *bios, int idx, struct nvbios_image *image)
70 {
71 u32 imaged_addr = bios->imaged_addr;
72 memset(image, 0x00, sizeof(*image));
73 bios->imaged_addr = 0;
74 do {
75 image->base += image->size;
76 if (image->last || !nvbios_imagen(bios, image)) {
77 bios->imaged_addr = imaged_addr;
78 return false;
79 }
80 } while(idx--);
81 bios->imaged_addr = imaged_addr;
82 return true;
83 }