1 /* $NetBSD: nouveau_nvkm_subdev_bios_P0260.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_P0260.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/P0260.h>
32
33 u32
nvbios_P0260Te(struct nvkm_bios * bios,u8 * ver,u8 * hdr,u8 * cnt,u8 * len,u8 * xnr,u8 * xsz)34 nvbios_P0260Te(struct nvkm_bios *bios,
35 u8 *ver, u8 *hdr, u8 *cnt, u8 *len, u8 *xnr, u8 *xsz)
36 {
37 struct bit_entry bit_P;
38 u32 data = 0x00000000;
39
40 if (!bit_entry(bios, 'P', &bit_P)) {
41 if (bit_P.version == 2 && bit_P.length > 0x63)
42 data = nvbios_rd32(bios, bit_P.offset + 0x60);
43 if (data) {
44 *ver = nvbios_rd08(bios, data + 0);
45 switch (*ver) {
46 case 0x10:
47 *hdr = nvbios_rd08(bios, data + 1);
48 *cnt = nvbios_rd08(bios, data + 2);
49 *len = 4;
50 *xnr = nvbios_rd08(bios, data + 3);
51 *xsz = 4;
52 return data;
53 default:
54 break;
55 }
56 }
57 }
58
59 return 0x00000000;
60 }
61
62 u32
nvbios_P0260Ee(struct nvkm_bios * bios,int idx,u8 * ver,u8 * len)63 nvbios_P0260Ee(struct nvkm_bios *bios, int idx, u8 *ver, u8 *len)
64 {
65 u8 hdr, cnt, xnr, xsz;
66 u32 data = nvbios_P0260Te(bios, ver, &hdr, &cnt, len, &xnr, &xsz);
67 if (data && idx < cnt)
68 return data + hdr + (idx * *len);
69 return 0x00000000;
70 }
71
72 u32
nvbios_P0260Ep(struct nvkm_bios * bios,int idx,u8 * ver,u8 * len,struct nvbios_P0260E * info)73 nvbios_P0260Ep(struct nvkm_bios *bios, int idx, u8 *ver, u8 *len,
74 struct nvbios_P0260E *info)
75 {
76 u32 data = nvbios_P0260Ee(bios, idx, ver, len);
77 memset(info, 0x00, sizeof(*info));
78 switch (!!data * *ver) {
79 case 0x10:
80 info->data = nvbios_rd32(bios, data);
81 return data;
82 default:
83 break;
84 }
85 return 0x00000000;
86 }
87
88 u32
nvbios_P0260Xe(struct nvkm_bios * bios,int idx,u8 * ver,u8 * xsz)89 nvbios_P0260Xe(struct nvkm_bios *bios, int idx, u8 *ver, u8 *xsz)
90 {
91 u8 hdr, cnt, len, xnr;
92 u32 data = nvbios_P0260Te(bios, ver, &hdr, &cnt, &len, &xnr, xsz);
93 if (data && idx < xnr)
94 return data + hdr + (cnt * len) + (idx * *xsz);
95 return 0x00000000;
96 }
97
98 u32
nvbios_P0260Xp(struct nvkm_bios * bios,int idx,u8 * ver,u8 * hdr,struct nvbios_P0260X * info)99 nvbios_P0260Xp(struct nvkm_bios *bios, int idx, u8 *ver, u8 *hdr,
100 struct nvbios_P0260X *info)
101 {
102 u32 data = nvbios_P0260Xe(bios, idx, ver, hdr);
103 memset(info, 0x00, sizeof(*info));
104 switch (!!data * *ver) {
105 case 0x10:
106 info->data = nvbios_rd32(bios, data);
107 return data;
108 default:
109 break;
110 }
111 return 0x00000000;
112 }
113