1 /*
2 * Copyright 2012 Nouveau Community
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: Martin Peres
23 */
24
25 #include <subdev/bios.h>
26 #include <subdev/bios/bit.h>
27 #include <subdev/bios/vmap.h>
28
29 u16
nvbios_vmap_table(struct nouveau_bios * bios,u8 * ver,u8 * hdr,u8 * cnt,u8 * len)30 nvbios_vmap_table(struct nouveau_bios *bios, u8 *ver, u8 *hdr, u8 *cnt, u8 *len)
31 {
32 struct bit_entry bit_P;
33 u16 vmap = 0x0000;
34
35 if (!bit_entry(bios, 'P', &bit_P)) {
36 if (bit_P.version == 2) {
37 vmap = nv_ro16(bios, bit_P.offset + 0x20);
38 if (vmap) {
39 *ver = nv_ro08(bios, vmap + 0);
40 switch (*ver) {
41 case 0x10:
42 case 0x20:
43 *hdr = nv_ro08(bios, vmap + 1);
44 *cnt = nv_ro08(bios, vmap + 3);
45 *len = nv_ro08(bios, vmap + 2);
46 return vmap;
47 default:
48 break;
49 }
50 }
51 }
52 }
53
54 return 0x0000;
55 }
56
57 u16
nvbios_vmap_parse(struct nouveau_bios * bios,u8 * ver,u8 * hdr,u8 * cnt,u8 * len,struct nvbios_vmap * info)58 nvbios_vmap_parse(struct nouveau_bios *bios, u8 *ver, u8 *hdr, u8 *cnt, u8 *len,
59 struct nvbios_vmap *info)
60 {
61 u16 vmap = nvbios_vmap_table(bios, ver, hdr, cnt, len);
62 memset(info, 0x00, sizeof(*info));
63 switch (!!vmap * *ver) {
64 case 0x10:
65 case 0x20:
66 break;
67 }
68 return vmap;
69 }
70
71 u16
nvbios_vmap_entry(struct nouveau_bios * bios,int idx,u8 * ver,u8 * len)72 nvbios_vmap_entry(struct nouveau_bios *bios, int idx, u8 *ver, u8 *len)
73 {
74 u8 hdr, cnt;
75 u16 vmap = nvbios_vmap_table(bios, ver, &hdr, &cnt, len);
76 if (vmap && idx < cnt) {
77 vmap = vmap + hdr + (idx * *len);
78 return vmap;
79 }
80 return 0x0000;
81 }
82
83 u16
nvbios_vmap_entry_parse(struct nouveau_bios * bios,int idx,u8 * ver,u8 * len,struct nvbios_vmap_entry * info)84 nvbios_vmap_entry_parse(struct nouveau_bios *bios, int idx, u8 *ver, u8 *len,
85 struct nvbios_vmap_entry *info)
86 {
87 u16 vmap = nvbios_vmap_entry(bios, idx, ver, len);
88 memset(info, 0x00, sizeof(*info));
89 switch (!!vmap * *ver) {
90 case 0x10:
91 info->link = 0xff;
92 info->min = nv_ro32(bios, vmap + 0x00);
93 info->max = nv_ro32(bios, vmap + 0x04);
94 info->arg[0] = nv_ro32(bios, vmap + 0x08);
95 info->arg[1] = nv_ro32(bios, vmap + 0x0c);
96 info->arg[2] = nv_ro32(bios, vmap + 0x10);
97 break;
98 case 0x20:
99 info->unk0 = nv_ro08(bios, vmap + 0x00);
100 info->link = nv_ro08(bios, vmap + 0x01);
101 info->min = nv_ro32(bios, vmap + 0x02);
102 info->max = nv_ro32(bios, vmap + 0x06);
103 info->arg[0] = nv_ro32(bios, vmap + 0x0a);
104 info->arg[1] = nv_ro32(bios, vmap + 0x0e);
105 info->arg[2] = nv_ro32(bios, vmap + 0x12);
106 info->arg[3] = nv_ro32(bios, vmap + 0x16);
107 info->arg[4] = nv_ro32(bios, vmap + 0x1a);
108 info->arg[5] = nv_ro32(bios, vmap + 0x1e);
109 break;
110 }
111 return vmap;
112 }
113