1/*	$NetBSD: nouveau_nvkm_subdev_bios_M0209.c,v 1.3 2021/12/18 23:45:38 riastradh Exp $	*/
2
3/*
4 * Copyright 2013 Red Hat Inc.
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the "Software"),
8 * to deal in the Software without restriction, including without limitation
9 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
10 * and/or sell copies of the Software, and to permit persons to whom the
11 * Software is furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
19 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
20 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
21 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
22 * OTHER DEALINGS IN THE SOFTWARE.
23 *
24 * Authors: Ben Skeggs
25 */
26#include <sys/cdefs.h>
27__KERNEL_RCSID(0, "$NetBSD: nouveau_nvkm_subdev_bios_M0209.c,v 1.3 2021/12/18 23:45:38 riastradh Exp $");
28
29#include <subdev/bios.h>
30#include <subdev/bios/bit.h>
31#include <subdev/bios/M0209.h>
32
33u32
34nvbios_M0209Te(struct nvkm_bios *bios,
35	       u8 *ver, u8 *hdr, u8 *cnt, u8 *len, u8 *snr, u8 *ssz)
36{
37	struct bit_entry bit_M;
38	u32 data = 0x00000000;
39
40	if (!bit_entry(bios, 'M', &bit_M)) {
41		if (bit_M.version == 2 && bit_M.length > 0x0c)
42			data = nvbios_rd32(bios, bit_M.offset + 0x09);
43		if (data) {
44			*ver = nvbios_rd08(bios, data + 0x00);
45			switch (*ver) {
46			case 0x10:
47				*hdr = nvbios_rd08(bios, data + 0x01);
48				*len = nvbios_rd08(bios, data + 0x02);
49				*ssz = nvbios_rd08(bios, data + 0x03);
50				*snr = 1;
51				*cnt = nvbios_rd08(bios, data + 0x04);
52				return data;
53			default:
54				break;
55			}
56		}
57	}
58
59	return 0x00000000;
60}
61
62u32
63nvbios_M0209Ee(struct nvkm_bios *bios, int idx,
64	       u8 *ver, u8 *hdr, u8 *cnt, u8 *len)
65{
66	u8  snr, ssz;
67	u32 data = nvbios_M0209Te(bios, ver, hdr, cnt, len, &snr, &ssz);
68	if (data && idx < *cnt) {
69		data = data + *hdr + idx * (*len + (snr * ssz));
70		*hdr = *len;
71		*cnt = snr;
72		*len = ssz;
73		return data;
74	}
75	return 0x00000000;
76}
77
78u32
79nvbios_M0209Ep(struct nvkm_bios *bios, int idx,
80	       u8 *ver, u8 *hdr, u8 *cnt, u8 *len, struct nvbios_M0209E *info)
81{
82	u32 data = nvbios_M0209Ee(bios, idx, ver, hdr, cnt, len);
83	memset(info, 0x00, sizeof(*info));
84	switch (!!data * *ver) {
85	case 0x10:
86		info->v00_40 = (nvbios_rd08(bios, data + 0x00) & 0x40) >> 6;
87		info->bits   =  nvbios_rd08(bios, data + 0x00) & 0x3f;
88		info->modulo =  nvbios_rd08(bios, data + 0x01);
89		info->v02_40 = (nvbios_rd08(bios, data + 0x02) & 0x40) >> 6;
90		info->v02_07 =  nvbios_rd08(bios, data + 0x02) & 0x07;
91		info->v03    =  nvbios_rd08(bios, data + 0x03);
92		return data;
93	default:
94		break;
95	}
96	return 0x00000000;
97}
98
99u32
100nvbios_M0209Se(struct nvkm_bios *bios, int ent, int idx, u8 *ver, u8 *hdr)
101{
102
103	u8  cnt, len;
104	u32 data = nvbios_M0209Ee(bios, ent, ver, hdr, &cnt, &len);
105	if (data && idx < cnt) {
106		data = data + *hdr + idx * len;
107		*hdr = len;
108		return data;
109	}
110	return 0x00000000;
111}
112
113u32
114nvbios_M0209Sp(struct nvkm_bios *bios, int ent, int idx, u8 *ver, u8 *hdr,
115	       struct nvbios_M0209S *info)
116{
117	struct nvbios_M0209E M0209E;
118	u8  cnt, len;
119	u32 data = nvbios_M0209Ep(bios, ent, ver, hdr, &cnt, &len, &M0209E);
120	if (data) {
121		u32 i, data = nvbios_M0209Se(bios, ent, idx, ver, hdr);
122		memset(info, 0x00, sizeof(*info));
123		switch (!!data * *ver) {
124		case 0x10:
125			for (i = 0; i < ARRAY_SIZE(info->data); i++) {
126				u32 bits = (i % M0209E.modulo) * M0209E.bits;
127				u32 mask = (1ULL << M0209E.bits) - 1;
128				u16  off = bits / 8;
129				u8   mod = bits % 8;
130				info->data[i] = nvbios_rd32(bios, data + off);
131				info->data[i] = info->data[i] >> mod;
132				info->data[i] = info->data[i] & mask;
133			}
134			return data;
135		default:
136			break;
137		}
138	}
139	return 0x00000000;
140}
141