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
28 u32
nvbios_P0260Te(struct nvkm_bios * bios,u8 * ver,u8 * hdr,u8 * cnt,u8 * len,u8 * xnr,u8 * xsz)29 nvbios_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
57 u32
nvbios_P0260Ee(struct nvkm_bios * bios,int idx,u8 * ver,u8 * len)58 nvbios_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
67 u32
nvbios_P0260Ep(struct nvkm_bios * bios,int idx,u8 * ver,u8 * len,struct nvbios_P0260E * info)68 nvbios_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
83 u32
nvbios_P0260Xe(struct nvkm_bios * bios,int idx,u8 * ver,u8 * xsz)84 nvbios_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
93 u32
nvbios_P0260Xp(struct nvkm_bios * bios,int idx,u8 * ver,u8 * hdr,struct nvbios_P0260X * info)94 nvbios_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