1/*
2 * Copyright 2013 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
23 */
24#include <subdev/bios.h>
25#include <subdev/bios/bit.h>
26#include <subdev/bios/P0260.h>
27
28u32
29nvbios_P0260Te(struct nvkm_bios *bios,
30	       u8 *ver, u8 *hdr, u8 *cnt, u8 *len, u8 *xnr, u8 *xsz)
31{
32	struct bit_entry bit_P;
33	u32 data = 0x00000000;
34
35	if (!bit_entry(bios, 'P', &bit_P)) {
36		if (bit_P.version == 2 && bit_P.length > 0x63)
37			data = nvbios_rd32(bios, bit_P.offset + 0x60);
38		if (data) {
39			*ver = nvbios_rd08(bios, data + 0);
40			switch (*ver) {
41			case 0x10:
42				*hdr = nvbios_rd08(bios, data + 1);
43				*cnt = nvbios_rd08(bios, data + 2);
44				*len = 4;
45				*xnr = nvbios_rd08(bios, data + 3);
46				*xsz = 4;
47				return data;
48			default:
49				break;
50			}
51		}
52	}
53
54	return 0x00000000;
55}
56
57u32
58nvbios_P0260Ee(struct nvkm_bios *bios, int idx, u8 *ver, u8 *len)
59{
60	u8  hdr, cnt, xnr, xsz;
61	u32 data = nvbios_P0260Te(bios, ver, &hdr, &cnt, len, &xnr, &xsz);
62	if (data && idx < cnt)
63		return data + hdr + (idx * *len);
64	return 0x00000000;
65}
66
67u32
68nvbios_P0260Ep(struct nvkm_bios *bios, int idx, u8 *ver, u8 *len,
69	       struct nvbios_P0260E *info)
70{
71	u32 data = nvbios_P0260Ee(bios, idx, ver, len);
72	memset(info, 0x00, sizeof(*info));
73	switch (!!data * *ver) {
74	case 0x10:
75		info->data = nvbios_rd32(bios, data);
76		return data;
77	default:
78		break;
79	}
80	return 0x00000000;
81}
82
83u32
84nvbios_P0260Xe(struct nvkm_bios *bios, int idx, u8 *ver, u8 *xsz)
85{
86	u8  hdr, cnt, len, xnr;
87	u32 data = nvbios_P0260Te(bios, ver, &hdr, &cnt, &len, &xnr, xsz);
88	if (data && idx < xnr)
89		return data + hdr + (cnt * len) + (idx * *xsz);
90	return 0x00000000;
91}
92
93u32
94nvbios_P0260Xp(struct nvkm_bios *bios, int idx, u8 *ver, u8 *hdr,
95	       struct nvbios_P0260X *info)
96{
97	u32 data = nvbios_P0260Xe(bios, idx, ver, hdr);
98	memset(info, 0x00, sizeof(*info));
99	switch (!!data * *ver) {
100	case 0x10:
101		info->data = nvbios_rd32(bios, data);
102		return data;
103	default:
104		break;
105	}
106	return 0x00000000;
107}
108