1 /* $NetBSD: nouveau_nvkm_subdev_bios_M0203.c,v 1.3 2021/12/18 23:45:38 riastradh Exp $ */
2
3 /*
4 * Copyright 2014 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_M0203.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/M0203.h>
32
33 u32
nvbios_M0203Te(struct nvkm_bios * bios,u8 * ver,u8 * hdr,u8 * cnt,u8 * len)34 nvbios_M0203Te(struct nvkm_bios *bios, u8 *ver, u8 *hdr, u8 *cnt, u8 *len)
35 {
36 struct bit_entry bit_M;
37 u32 data = 0x00000000;
38
39 if (!bit_entry(bios, 'M', &bit_M)) {
40 if (bit_M.version == 2 && bit_M.length > 0x04)
41 data = nvbios_rd16(bios, bit_M.offset + 0x03);
42 if (data) {
43 *ver = nvbios_rd08(bios, data + 0x00);
44 switch (*ver) {
45 case 0x10:
46 *hdr = nvbios_rd08(bios, data + 0x01);
47 *len = nvbios_rd08(bios, data + 0x02);
48 *cnt = nvbios_rd08(bios, data + 0x03);
49 return data;
50 default:
51 break;
52 }
53 }
54 }
55
56 return 0x00000000;
57 }
58
59 u32
nvbios_M0203Tp(struct nvkm_bios * bios,u8 * ver,u8 * hdr,u8 * cnt,u8 * len,struct nvbios_M0203T * info)60 nvbios_M0203Tp(struct nvkm_bios *bios, u8 *ver, u8 *hdr, u8 *cnt, u8 *len,
61 struct nvbios_M0203T *info)
62 {
63 u32 data = nvbios_M0203Te(bios, ver, hdr, cnt, len);
64 memset(info, 0x00, sizeof(*info));
65 switch (!!data * *ver) {
66 case 0x10:
67 info->type = nvbios_rd08(bios, data + 0x04);
68 info->pointer = nvbios_rd16(bios, data + 0x05);
69 break;
70 default:
71 break;
72 }
73 return data;
74 }
75
76 u32
nvbios_M0203Ee(struct nvkm_bios * bios,int idx,u8 * ver,u8 * hdr)77 nvbios_M0203Ee(struct nvkm_bios *bios, int idx, u8 *ver, u8 *hdr)
78 {
79 u8 cnt, len;
80 u32 data = nvbios_M0203Te(bios, ver, hdr, &cnt, &len);
81 if (data && idx < cnt) {
82 data = data + *hdr + idx * len;
83 *hdr = len;
84 return data;
85 }
86 return 0x00000000;
87 }
88
89 u32
nvbios_M0203Ep(struct nvkm_bios * bios,int idx,u8 * ver,u8 * hdr,struct nvbios_M0203E * info)90 nvbios_M0203Ep(struct nvkm_bios *bios, int idx, u8 *ver, u8 *hdr,
91 struct nvbios_M0203E *info)
92 {
93 u32 data = nvbios_M0203Ee(bios, idx, ver, hdr);
94 memset(info, 0x00, sizeof(*info));
95 switch (!!data * *ver) {
96 case 0x10:
97 info->type = (nvbios_rd08(bios, data + 0x00) & 0x0f) >> 0;
98 info->strap = (nvbios_rd08(bios, data + 0x00) & 0xf0) >> 4;
99 info->group = (nvbios_rd08(bios, data + 0x01) & 0x0f) >> 0;
100 return data;
101 default:
102 break;
103 }
104 return 0x00000000;
105 }
106
107 u32
nvbios_M0203Em(struct nvkm_bios * bios,u8 ramcfg,u8 * ver,u8 * hdr,struct nvbios_M0203E * info)108 nvbios_M0203Em(struct nvkm_bios *bios, u8 ramcfg, u8 *ver, u8 *hdr,
109 struct nvbios_M0203E *info)
110 {
111 struct nvkm_subdev *subdev = &bios->subdev;
112 struct nvbios_M0203T M0203T;
113 u8 cnt, len, idx = 0xff;
114 u32 data;
115
116 if (!nvbios_M0203Tp(bios, ver, hdr, &cnt, &len, &M0203T)) {
117 nvkm_warn(subdev, "M0203T not found\n");
118 return 0x00000000;
119 }
120
121 while ((data = nvbios_M0203Ep(bios, ++idx, ver, hdr, info))) {
122 switch (M0203T.type) {
123 case M0203T_TYPE_RAMCFG:
124 if (info->strap != ramcfg)
125 continue;
126 return data;
127 default:
128 nvkm_warn(subdev, "M0203T type %02x\n", M0203T.type);
129 return 0x00000000;
130 }
131 }
132
133 return data;
134 }
135