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
29static bool
30nvbios_imagen(struct nvkm_bios *bios, struct nvbios_image *image)
31{
32	struct nvbios_pcirT pcir;
33	struct nvbios_npdeT npde;
34	u8  ver;
35	u16 hdr;
36	u32 data;
37
38	switch ((data = nv_ro16(bios, image->base + 0x00))) {
39	case 0xaa55:
40	case 0xbb77:
41	case 0x4e56: /* NV */
42		break;
43	default:
44		nv_debug(bios, "%08x: ROM signature (%04x) unknown\n",
45			 image->base, data);
46		return false;
47	}
48
49	if (!(data = nvbios_pcirTp(bios, image->base, &ver, &hdr, &pcir)))
50		return false;
51	image->size = pcir.image_size;
52	image->type = pcir.image_type;
53	image->last = pcir.last;
54
55	if (image->type != 0x70) {
56		if (!(data = nvbios_npdeTp(bios, image->base, &npde)))
57			return true;
58		image->size = npde.image_size;
59		image->last = npde.last;
60	} else {
61		image->last = true;
62	}
63
64	return true;
65}
66
67bool
68nvbios_image(struct nvkm_bios *bios, int idx, struct nvbios_image *image)
69{
70	memset(image, 0x00, sizeof(*image));
71	do {
72		image->base += image->size;
73		if (image->last || !nvbios_imagen(bios, image))
74			return false;
75	} while(idx--);
76	return true;
77}
78