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
33 u32
nvbios_M0209Te(struct nvkm_bios * bios,u8 * ver,u8 * hdr,u8 * cnt,u8 * len,u8 * snr,u8 * ssz)34 nvbios_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
62 u32
nvbios_M0209Ee(struct nvkm_bios * bios,int idx,u8 * ver,u8 * hdr,u8 * cnt,u8 * len)63 nvbios_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
78 u32
nvbios_M0209Ep(struct nvkm_bios * bios,int idx,u8 * ver,u8 * hdr,u8 * cnt,u8 * len,struct nvbios_M0209E * info)79 nvbios_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
99 u32
nvbios_M0209Se(struct nvkm_bios * bios,int ent,int idx,u8 * ver,u8 * hdr)100 nvbios_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
113 u32
nvbios_M0209Sp(struct nvkm_bios * bios,int ent,int idx,u8 * ver,u8 * hdr,struct nvbios_M0209S * info)114 nvbios_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