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/M0205.h>
27
28u32
29nvbios_M0205Te(struct nvkm_bios *bios,
30	       u8 *ver, u8 *hdr, u8 *cnt, u8 *len, u8 *snr, u8 *ssz)
31{
32	struct bit_entry bit_M;
33	u32 data = 0x00000000;
34
35	if (!bit_entry(bios, 'M', &bit_M)) {
36		if (bit_M.version == 2 && bit_M.length > 0x08)
37			data = nvbios_rd32(bios, bit_M.offset + 0x05);
38		if (data) {
39			*ver = nvbios_rd08(bios, data + 0x00);
40			switch (*ver) {
41			case 0x10:
42				*hdr = nvbios_rd08(bios, data + 0x01);
43				*len = nvbios_rd08(bios, data + 0x02);
44				*ssz = nvbios_rd08(bios, data + 0x03);
45				*snr = nvbios_rd08(bios, data + 0x04);
46				*cnt = nvbios_rd08(bios, data + 0x05);
47				return data;
48			default:
49				break;
50			}
51		}
52	}
53
54	return 0x00000000;
55}
56
57u32
58nvbios_M0205Tp(struct nvkm_bios *bios,
59	       u8 *ver, u8 *hdr, u8 *cnt, u8 *len, u8 *snr, u8 *ssz,
60	       struct nvbios_M0205T *info)
61{
62	u32 data = nvbios_M0205Te(bios, ver, hdr, cnt, len, snr, ssz);
63	memset(info, 0x00, sizeof(*info));
64	switch (!!data * *ver) {
65	case 0x10:
66		info->freq = nvbios_rd16(bios, data + 0x06);
67		break;
68	default:
69		break;
70	}
71	return data;
72}
73
74u32
75nvbios_M0205Ee(struct nvkm_bios *bios, int idx,
76	       u8 *ver, u8 *hdr, u8 *cnt, u8 *len)
77{
78	u8  snr, ssz;
79	u32 data = nvbios_M0205Te(bios, ver, hdr, cnt, len, &snr, &ssz);
80	if (data && idx < *cnt) {
81		data = data + *hdr + idx * (*len + (snr * ssz));
82		*hdr = *len;
83		*cnt = snr;
84		*len = ssz;
85		return data;
86	}
87	return 0x00000000;
88}
89
90u32
91nvbios_M0205Ep(struct nvkm_bios *bios, int idx,
92	       u8 *ver, u8 *hdr, u8 *cnt, u8 *len,
93	       struct nvbios_M0205E *info)
94{
95	u32 data = nvbios_M0205Ee(bios, idx, ver, hdr, cnt, len);
96	memset(info, 0x00, sizeof(*info));
97	switch (!!data * *ver) {
98	case 0x10:
99		info->type = nvbios_rd08(bios, data + 0x00) & 0x0f;
100		return data;
101	default:
102		break;
103	}
104	return 0x00000000;
105}
106
107u32
108nvbios_M0205Se(struct nvkm_bios *bios, int ent, int idx, u8 *ver, u8 *hdr)
109{
110
111	u8  cnt, len;
112	u32 data = nvbios_M0205Ee(bios, ent, ver, hdr, &cnt, &len);
113	if (data && idx < cnt) {
114		data = data + *hdr + idx * len;
115		*hdr = len;
116		return data;
117	}
118	return 0x00000000;
119}
120
121u32
122nvbios_M0205Sp(struct nvkm_bios *bios, int ent, int idx, u8 *ver, u8 *hdr,
123	       struct nvbios_M0205S *info)
124{
125	u32 data = nvbios_M0205Se(bios, ent, idx, ver, hdr);
126	memset(info, 0x00, sizeof(*info));
127	switch (!!data * *ver) {
128	case 0x10:
129		info->data = nvbios_rd08(bios, data + 0x00);
130		return data;
131	default:
132		break;
133	}
134	return 0x00000000;
135}
136