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/volt.h>
28
29 u16
nvbios_volt_table(struct nouveau_bios * bios,u8 * ver,u8 * hdr,u8 * cnt,u8 * len)30 nvbios_volt_table(struct nouveau_bios *bios, u8 *ver, u8 *hdr, u8 *cnt, u8 *len)
31 {
32 struct bit_entry bit_P;
33 u16 volt = 0x0000;
34
35 if (!bit_entry(bios, 'P', &bit_P)) {
36 if (bit_P.version == 2)
37 volt = nv_ro16(bios, bit_P.offset + 0x0c);
38 else
39 if (bit_P.version == 1)
40 volt = nv_ro16(bios, bit_P.offset + 0x10);
41
42 if (volt) {
43 *ver = nv_ro08(bios, volt + 0);
44 switch (*ver) {
45 case 0x12:
46 *hdr = 5;
47 *cnt = nv_ro08(bios, volt + 2);
48 *len = nv_ro08(bios, volt + 1);
49 return volt;
50 case 0x20:
51 *hdr = nv_ro08(bios, volt + 1);
52 *cnt = nv_ro08(bios, volt + 2);
53 *len = nv_ro08(bios, volt + 3);
54 return volt;
55 case 0x30:
56 case 0x40:
57 case 0x50:
58 *hdr = nv_ro08(bios, volt + 1);
59 *cnt = nv_ro08(bios, volt + 3);
60 *len = nv_ro08(bios, volt + 2);
61 return volt;
62 }
63 }
64 }
65
66 return 0x0000;
67 }
68
69 u16
nvbios_volt_parse(struct nouveau_bios * bios,u8 * ver,u8 * hdr,u8 * cnt,u8 * len,struct nvbios_volt * info)70 nvbios_volt_parse(struct nouveau_bios *bios, u8 *ver, u8 *hdr, u8 *cnt, u8 *len,
71 struct nvbios_volt *info)
72 {
73 u16 volt = nvbios_volt_table(bios, ver, hdr, cnt, len);
74 memset(info, 0x00, sizeof(*info));
75 switch (!!volt * *ver) {
76 case 0x12:
77 info->vidmask = nv_ro08(bios, volt + 0x04);
78 break;
79 case 0x20:
80 info->vidmask = nv_ro08(bios, volt + 0x05);
81 break;
82 case 0x30:
83 info->vidmask = nv_ro08(bios, volt + 0x04);
84 break;
85 case 0x40:
86 info->base = nv_ro32(bios, volt + 0x04);
87 info->step = nv_ro16(bios, volt + 0x08);
88 info->vidmask = nv_ro08(bios, volt + 0x0b);
89 /*XXX*/
90 info->min = 0;
91 info->max = info->base;
92 break;
93 case 0x50:
94 info->vidmask = nv_ro08(bios, volt + 0x06);
95 info->min = nv_ro32(bios, volt + 0x0a);
96 info->max = nv_ro32(bios, volt + 0x0e);
97 info->base = nv_ro32(bios, volt + 0x12) & 0x00ffffff;
98 info->step = nv_ro16(bios, volt + 0x16);
99 break;
100 }
101 return volt;
102 }
103
104 u16
nvbios_volt_entry(struct nouveau_bios * bios,int idx,u8 * ver,u8 * len)105 nvbios_volt_entry(struct nouveau_bios *bios, int idx, u8 *ver, u8 *len)
106 {
107 u8 hdr, cnt;
108 u16 volt = nvbios_volt_table(bios, ver, &hdr, &cnt, len);
109 if (volt && idx < cnt) {
110 volt = volt + hdr + (idx * *len);
111 return volt;
112 }
113 return 0x0000;
114 }
115
116 u16
nvbios_volt_entry_parse(struct nouveau_bios * bios,int idx,u8 * ver,u8 * len,struct nvbios_volt_entry * info)117 nvbios_volt_entry_parse(struct nouveau_bios *bios, int idx, u8 *ver, u8 *len,
118 struct nvbios_volt_entry *info)
119 {
120 u16 volt = nvbios_volt_entry(bios, idx, ver, len);
121 memset(info, 0x00, sizeof(*info));
122 switch (!!volt * *ver) {
123 case 0x12:
124 case 0x20:
125 info->voltage = nv_ro08(bios, volt + 0x00) * 10000;
126 info->vid = nv_ro08(bios, volt + 0x01);
127 break;
128 case 0x30:
129 info->voltage = nv_ro08(bios, volt + 0x00) * 10000;
130 info->vid = nv_ro08(bios, volt + 0x01) >> 2;
131 break;
132 case 0x40:
133 case 0x50:
134 break;
135 }
136 return volt;
137 }
138