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4766ec53 BS |
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 | |
23 | */ | |
4766ec53 BS |
24 | #include <subdev/bios.h> |
25 | #include <subdev/bios/bit.h> | |
26 | #include <subdev/bios/M0203.h> | |
27 | ||
28 | u32 | |
d390b480 | 29 | nvbios_M0203Te(struct nvkm_bios *bios, u8 *ver, u8 *hdr, u8 *cnt, u8 *len) |
4766ec53 BS |
30 | { |
31 | struct bit_entry bit_M; | |
32 | u32 data = 0x00000000; | |
33 | ||
34 | if (!bit_entry(bios, 'M', &bit_M)) { | |
35 | if (bit_M.version == 2 && bit_M.length > 0x04) | |
7f5f518f | 36 | data = nvbios_rd16(bios, bit_M.offset + 0x03); |
4766ec53 | 37 | if (data) { |
7f5f518f | 38 | *ver = nvbios_rd08(bios, data + 0x00); |
4766ec53 BS |
39 | switch (*ver) { |
40 | case 0x10: | |
7f5f518f BS |
41 | *hdr = nvbios_rd08(bios, data + 0x01); |
42 | *len = nvbios_rd08(bios, data + 0x02); | |
43 | *cnt = nvbios_rd08(bios, data + 0x03); | |
4766ec53 BS |
44 | return data; |
45 | default: | |
46 | break; | |
47 | } | |
48 | } | |
49 | } | |
50 | ||
51 | return 0x00000000; | |
52 | } | |
53 | ||
54 | u32 | |
d390b480 | 55 | nvbios_M0203Tp(struct nvkm_bios *bios, u8 *ver, u8 *hdr, u8 *cnt, u8 *len, |
4766ec53 BS |
56 | struct nvbios_M0203T *info) |
57 | { | |
58 | u32 data = nvbios_M0203Te(bios, ver, hdr, cnt, len); | |
59 | memset(info, 0x00, sizeof(*info)); | |
60 | switch (!!data * *ver) { | |
61 | case 0x10: | |
7f5f518f BS |
62 | info->type = nvbios_rd08(bios, data + 0x04); |
63 | info->pointer = nvbios_rd16(bios, data + 0x05); | |
4766ec53 BS |
64 | break; |
65 | default: | |
66 | break; | |
67 | } | |
68 | return data; | |
69 | } | |
70 | ||
71 | u32 | |
d390b480 | 72 | nvbios_M0203Ee(struct nvkm_bios *bios, int idx, u8 *ver, u8 *hdr) |
4766ec53 BS |
73 | { |
74 | u8 cnt, len; | |
75 | u32 data = nvbios_M0203Te(bios, ver, hdr, &cnt, &len); | |
76 | if (data && idx < cnt) { | |
77 | data = data + *hdr + idx * len; | |
78 | *hdr = len; | |
79 | return data; | |
80 | } | |
81 | return 0x00000000; | |
82 | } | |
83 | ||
84 | u32 | |
d390b480 | 85 | nvbios_M0203Ep(struct nvkm_bios *bios, int idx, u8 *ver, u8 *hdr, |
4766ec53 BS |
86 | struct nvbios_M0203E *info) |
87 | { | |
88 | u32 data = nvbios_M0203Ee(bios, idx, ver, hdr); | |
89 | memset(info, 0x00, sizeof(*info)); | |
90 | switch (!!data * *ver) { | |
91 | case 0x10: | |
7f5f518f BS |
92 | info->type = (nvbios_rd08(bios, data + 0x00) & 0x0f) >> 0; |
93 | info->strap = (nvbios_rd08(bios, data + 0x00) & 0xf0) >> 4; | |
94 | info->group = (nvbios_rd08(bios, data + 0x01) & 0x0f) >> 0; | |
4766ec53 BS |
95 | return data; |
96 | default: | |
97 | break; | |
98 | } | |
99 | return 0x00000000; | |
100 | } | |
101 | ||
102 | u32 | |
d390b480 | 103 | nvbios_M0203Em(struct nvkm_bios *bios, u8 ramcfg, u8 *ver, u8 *hdr, |
4766ec53 BS |
104 | struct nvbios_M0203E *info) |
105 | { | |
60b29d20 | 106 | struct nvkm_subdev *subdev = &bios->subdev; |
4766ec53 BS |
107 | struct nvbios_M0203T M0203T; |
108 | u8 cnt, len, idx = 0xff; | |
109 | u32 data; | |
110 | ||
111 | if (!nvbios_M0203Tp(bios, ver, hdr, &cnt, &len, &M0203T)) { | |
60b29d20 | 112 | nvkm_warn(subdev, "M0203T not found\n"); |
4766ec53 BS |
113 | return 0x00000000; |
114 | } | |
115 | ||
116 | while ((data = nvbios_M0203Ep(bios, ++idx, ver, hdr, info))) { | |
117 | switch (M0203T.type) { | |
118 | case M0203T_TYPE_RAMCFG: | |
119 | if (info->strap != ramcfg) | |
120 | continue; | |
121 | return data; | |
122 | default: | |
60b29d20 | 123 | nvkm_warn(subdev, "M0203T type %02x\n", M0203T.type); |
4766ec53 BS |
124 | return 0x00000000; |
125 | } | |
126 | } | |
127 | ||
128 | return data; | |
129 | } |